more tests disabled

* save timepoints after connect and not in contructor, adjusted tests

* move call into setReadyState

* more time to detect client close in test

.gitignore

@@ -1 +1,2 @@
 build
+*.pyc

DOCKER_VERSION

@@ -1 +1 @@
-1.4.3
+2.0.0

Dockerfile

@@ -1 +1 @@
-docker/Dockerfile.fedora
+docker/Dockerfile.ubuntu_xenial

README.md

@@ -37,7 +37,7 @@ webSocket.setOnMessageCallback(
        const ix::WebSocketOpenInfo& openInfo,
        const ix::WebSocketCloseInfo& closeInfo)
     {
-        if (messageType == ix::WebSocket_MessageType_Message)
+        if (messageType == ix::WebSocketMessageType::Message)
         {
             std::cout << str << std::endl;
         }
@@ -77,7 +77,7 @@ server.setOnConnectionCallback(
                const ix::WebSocketOpenInfo& openInfo,
                const ix::WebSocketCloseInfo& closeInfo)
             {
-                if (messageType == ix::WebSocket_MessageType_Open)
+                if (messageType == ix::WebSocketMessageType::Open)
                 {
                     std::cerr << "New connection" << std::endl;
 
@@ -96,7 +96,7 @@ server.setOnConnectionCallback(
                         std::cerr << it.first << ": " << it.second << std::endl;
                     }
                 }
-                else if (messageType == ix::WebSocket_MessageType_Message)
+                else if (messageType == ix::WebSocketMessageType::Message)
                 {
                     // For an echo server, we just send back to the client whatever was received by the server
                     // All connected clients are available in an std::set. See the broadcast cpp example.
@@ -301,10 +301,10 @@ If the connection was closed and sending failed, the return value will be set to
 
 `getReadyState()` returns the state of the connection. There are 4 possible states.
 
-1. WebSocket_ReadyState_Connecting - The connection is not yet open.
-2. WebSocket_ReadyState_Open       - The connection is open and ready to communicate.
-3. WebSocket_ReadyState_Closing    - The connection is in the process of closing.
-4. WebSocket_MessageType_Close     - The connection is closed or could not be opened.
+1. ReadyState::Connecting - The connection is not yet open.
+2. ReadyState::Open       - The connection is open and ready to communicate.
+3. ReadyState::Closing    - The connection is in the process of closing.
+4. ReadyState::Closed     - The connection is closed or could not be opened.
 
 ### Open and Close notifications
 
@@ -319,7 +319,7 @@ webSocket.setOnMessageCallback(
        const ix::WebSocketOpenInfo& openInfo,
        const ix::WebSocketCloseInfo& closeInfo)
     {
-        if (messageType == ix::WebSocket_MessageType_Open)
+        if (messageType == ix::WebSocketMessageType::Open)
         {
             std::cout << "send greetings" << std::endl;
 
@@ -330,7 +330,7 @@ webSocket.setOnMessageCallback(
                 std::cout << it.first << ": " << it.second << std::endl;
             }
         }
-        else if (messageType == ix::WebSocket_MessageType_Close)
+        else if (messageType == ix::WebSocketMessageType::Close)
         {
             std::cout << "disconnected" << std::endl;
 
@@ -345,7 +345,7 @@ webSocket.setOnMessageCallback(
 
 ### Error notification
 
-A message will be fired when there is an error with the connection. The message type will be `ix::WebSocket_MessageType_Error`. Multiple fields will be available on the event to describe the error.
+A message will be fired when there is an error with the connection. The message type will be `ix::WebSocketMessageType::Error`. Multiple fields will be available on the event to describe the error.
 
 ```
 webSocket.setOnMessageCallback(
@@ -356,7 +356,7 @@ webSocket.setOnMessageCallback(
        const ix::WebSocketOpenInfo& openInfo,
        const ix::WebSocketCloseInfo& closeInfo)
     {
-        if (messageType == ix::WebSocket_MessageType_Error)
+        if (messageType == ix::WebSocketMessageType::Error)
         {
             std::stringstream ss;
             ss << "Error: "         << error.reason      << std::endl;
@@ -396,8 +396,8 @@ webSocket.setOnMessageCallback(
        const ix::WebSocketOpenInfo& openInfo,
        const ix::WebSocketCloseInfo& closeInfo)
     {
-        if (messageType == ix::WebSocket_MessageType_Ping ||
-            messageType == ix::WebSocket_MessageType_Pong)
+        if (messageType == ix::WebSocketMessageType::Ping ||
+            messageType == ix::WebSocketMessageType::Pong)
         {
             std::cout << "pong data: " << str << std::endl;
         }

ixwebsocket/IXHttpClient.cpp

@@ -52,7 +52,7 @@ namespace ix
         {
             std::stringstream ss;
             ss << "Cannot parse url: " << url;
-            return std::make_tuple(code, HttpErrorCode_UrlMalformed,
+            return std::make_tuple(code, HttpErrorCode::UrlMalformed,
                                    headers, payload, ss.str(),
                                    uploadSize, downloadSize);
         }
@@ -63,7 +63,7 @@ namespace ix
 
         if (!_socket)
         {
-            return std::make_tuple(code, HttpErrorCode_CannotCreateSocket,
+            return std::make_tuple(code, HttpErrorCode::CannotCreateSocket,
                                    headers, payload, errorMsg,
                                    uploadSize, downloadSize);
         }
@@ -116,7 +116,7 @@ namespace ix
         {
             std::stringstream ss;
             ss << "Cannot connect to url: " << url;
-            return std::make_tuple(code, HttpErrorCode_CannotConnect,
+            return std::make_tuple(code, HttpErrorCode::CannotConnect,
                                    headers, payload, ss.str(),
                                    uploadSize, downloadSize);
         }
@@ -142,7 +142,7 @@ namespace ix
         if (!_socket->writeBytes(req, isCancellationRequested))
         {
             std::string errorMsg("Cannot send request");
-            return std::make_tuple(code, HttpErrorCode_SendError,
+            return std::make_tuple(code, HttpErrorCode::SendError,
                                    headers, payload, errorMsg,
                                    uploadSize, downloadSize);
         }
@@ -156,7 +156,7 @@ namespace ix
         if (!lineValid)
         {
             std::string errorMsg("Cannot retrieve status line");
-            return std::make_tuple(code, HttpErrorCode_CannotReadStatusLine,
+            return std::make_tuple(code, HttpErrorCode::CannotReadStatusLine,
                                    headers, payload, errorMsg,
                                    uploadSize, downloadSize);
         }
@@ -171,7 +171,7 @@ namespace ix
         if (sscanf(line.c_str(), "HTTP/1.1 %d", &code) != 1)
         {
             std::string errorMsg("Cannot parse response code from status line");
-            return std::make_tuple(code, HttpErrorCode_MissingStatus,
+            return std::make_tuple(code, HttpErrorCode::MissingStatus,
                                    headers, payload, errorMsg,
                                    uploadSize, downloadSize);
         }
@@ -183,7 +183,7 @@ namespace ix
         if (!headersValid)
         {
             std::string errorMsg("Cannot parse http headers");
-            return std::make_tuple(code, HttpErrorCode_HeaderParsingError,
+            return std::make_tuple(code, HttpErrorCode::HeaderParsingError,
                                    headers, payload, errorMsg,
                                    uploadSize, downloadSize);
         }
@@ -194,7 +194,7 @@ namespace ix
             if (headers.find("Location") == headers.end())
             {
                 std::string errorMsg("Missing location header for redirect");
-                return std::make_tuple(code, HttpErrorCode_MissingLocation,
+                return std::make_tuple(code, HttpErrorCode::MissingLocation,
                                        headers, payload, errorMsg,
                                        uploadSize, downloadSize);
             }
@@ -203,7 +203,7 @@ namespace ix
             {
                 std::stringstream ss;
                 ss << "Too many redirects: " << redirects;
-                return std::make_tuple(code, HttpErrorCode_TooManyRedirects,
+                return std::make_tuple(code, HttpErrorCode::TooManyRedirects,
                                        headers, payload, ss.str(),
                                        uploadSize, downloadSize);
             }
@@ -215,7 +215,7 @@ namespace ix
 
         if (verb == "HEAD")
         {
-            return std::make_tuple(code, HttpErrorCode_Ok,
+            return std::make_tuple(code, HttpErrorCode::Ok,
                                    headers, payload, std::string(),
                                    uploadSize, downloadSize);
         }
@@ -236,7 +236,7 @@ namespace ix
             if (!chunkResult.first)
             {
                 errorMsg = "Cannot read chunk";
-                return std::make_tuple(code, HttpErrorCode_ChunkReadError,
+                return std::make_tuple(code, HttpErrorCode::ChunkReadError,
                                        headers, payload, errorMsg,
                                        uploadSize, downloadSize);
             }
@@ -254,7 +254,7 @@ namespace ix
 
                 if (!lineResult.first)
                 {
-                    return std::make_tuple(code, HttpErrorCode_ChunkReadError,
+                    return std::make_tuple(code, HttpErrorCode::ChunkReadError,
                                            headers, payload, errorMsg,
                                            uploadSize, downloadSize);
                 }
@@ -281,7 +281,7 @@ namespace ix
                 if (!chunkResult.first)
                 {
                     errorMsg = "Cannot read chunk";
-                    return std::make_tuple(code, HttpErrorCode_ChunkReadError,
+                    return std::make_tuple(code, HttpErrorCode::ChunkReadError,
                                            headers, payload, errorMsg,
                                            uploadSize, downloadSize);
                 }
@@ -292,7 +292,7 @@ namespace ix
 
                 if (!lineResult.first)
                 {
-                    return std::make_tuple(code, HttpErrorCode_ChunkReadError,
+                    return std::make_tuple(code, HttpErrorCode::ChunkReadError,
                                            headers, payload, errorMsg,
                                            uploadSize, downloadSize);
                 }
@@ -307,7 +307,7 @@ namespace ix
         else
         {
             std::string errorMsg("Cannot read http body");
-            return std::make_tuple(code, HttpErrorCode_CannotReadBody,
+            return std::make_tuple(code, HttpErrorCode::CannotReadBody,
                                    headers, payload, errorMsg,
                                    uploadSize, downloadSize);
         }
@@ -321,14 +321,14 @@ namespace ix
             if (!gzipInflate(payload, decompressedPayload))
             {
                 std::string errorMsg("Error decompressing payload");
-                return std::make_tuple(code, HttpErrorCode_Gzip,
+                return std::make_tuple(code, HttpErrorCode::Gzip,
                                        headers, payload, errorMsg,
                                        uploadSize, downloadSize);
             }
             payload = decompressedPayload;
         }
 
-        return std::make_tuple(code, HttpErrorCode_Ok,
+        return std::make_tuple(code, HttpErrorCode::Ok,
                                headers, payload, std::string(),
                                uploadSize, downloadSize);
     }

ixwebsocket/IXHttpClient.h

@@ -19,23 +19,23 @@
 
 namespace ix
 {
-    enum HttpErrorCode
+    enum class HttpErrorCode
     {
-        HttpErrorCode_Ok = 0,
-        HttpErrorCode_CannotConnect = 1,
-        HttpErrorCode_Timeout = 2,
-        HttpErrorCode_Gzip = 3,
-        HttpErrorCode_UrlMalformed = 4,
-        HttpErrorCode_CannotCreateSocket = 5,
-        HttpErrorCode_SendError = 6,
-        HttpErrorCode_ReadError = 7,
-        HttpErrorCode_CannotReadStatusLine = 8,
-        HttpErrorCode_MissingStatus = 9,
-        HttpErrorCode_HeaderParsingError = 10,
-        HttpErrorCode_MissingLocation = 11,
-        HttpErrorCode_TooManyRedirects = 12,
-        HttpErrorCode_ChunkReadError = 13,
-        HttpErrorCode_CannotReadBody = 14
+        Ok                       = 0,
+        CannotConnect            = 1,
+        Timeout                  = 2,
+        Gzip                     = 3,
+        UrlMalformed             = 4,
+        CannotCreateSocket       = 5,
+        SendError                = 6,
+        ReadError                = 7,
+        CannotReadStatusLine     = 8,
+        MissingStatus            = 9,
+        HeaderParsingError       = 10,
+        MissingLocation          = 11,
+        TooManyRedirects         = 12,
+        ChunkReadError           = 13,
+        CannotReadBody           = 14
     };
 
     using HttpResponse = std::tuple<int, // status

ixwebsocket/IXSelectInterruptEventFd.h

@@ -13,7 +13,7 @@
 
 namespace ix
 {
-    class SelectInterruptEventFd : public SelectInterrupt {
+    class SelectInterruptEventFd final : public SelectInterrupt {
     public:
         SelectInterruptEventFd();
         virtual ~SelectInterruptEventFd();

ixwebsocket/IXSelectInterruptPipe.cpp

@@ -40,6 +40,8 @@ namespace ix
 
     bool SelectInterruptPipe::init(std::string& errorMsg)
     {
+        std::lock_guard<std::mutex> lock(_fildesMutex);
+
         // calling init twice is a programming error
         assert(_fildes[kPipeReadIndex] == -1);
         assert(_fildes[kPipeWriteIndex] == -1);
@@ -108,6 +110,8 @@ namespace ix
 
     bool SelectInterruptPipe::notify(uint64_t value)
     {
+        std::lock_guard<std::mutex> lock(_fildesMutex);
+
         int fd = _fildes[kPipeWriteIndex];
         if (fd == -1) return false;
 
@@ -118,6 +122,8 @@ namespace ix
     // TODO: return max uint64_t for errors ?
     uint64_t SelectInterruptPipe::read()
     {
+        std::lock_guard<std::mutex> lock(_fildesMutex);
+
         int fd = _fildes[kPipeReadIndex];
 
         uint64_t value = 0;
@@ -133,6 +139,8 @@ namespace ix
 
     int SelectInterruptPipe::getFd() const
     {
+        std::lock_guard<std::mutex> lock(_fildesMutex);
+
         return _fildes[kPipeReadIndex];
     }
 }

ixwebsocket/IXSelectInterruptPipe.h

@@ -10,10 +10,11 @@
 
 #include <stdint.h>
 #include <string>
+#include <mutex>
 
 namespace ix
 {
-    class SelectInterruptPipe : public SelectInterrupt {
+    class SelectInterruptPipe final : public SelectInterrupt {
     public:
         SelectInterruptPipe();
         virtual ~SelectInterruptPipe();
@@ -30,6 +31,7 @@ namespace ix
         // happens between a control thread and a background thread, which is
         // blocked on select.
         int _fildes[2];
+        mutable std::mutex _fildesMutex;
 
         // Used to identify the read/write idx
         static const int kPipeReadIndex;

ixwebsocket/IXSocket.cpp

@@ -19,7 +19,6 @@
 #include <sys/types.h>
 
 #include <algorithm>
-#include <iostream>
 
 #ifdef min
 #undef min
@@ -45,14 +44,14 @@ namespace ix
         close();
     }
 
-    PollResultType Socket::poll(int timeoutSecs)
+    PollResultType Socket::poll(int timeoutMs)
     {
         if (_sockfd == -1)
         {
             return PollResultType::Error;
         }
 
-        return isReadyToRead(1000 * timeoutSecs);
+        return isReadyToRead(timeoutMs);
     }
 
     PollResultType Socket::select(bool readyToRead, int timeoutMs)
@@ -74,7 +73,7 @@ namespace ix
 
         struct timeval timeout;
         timeout.tv_sec = timeoutMs / 1000;
-        timeout.tv_usec = (timeoutMs < 1000) ? 0 : 1000 * (timeoutMs % 1000);
+        timeout.tv_usec = 1000 * (timeoutMs % 1000);
 
         // Compute the highest fd.
         int sockfd = _sockfd;
@@ -160,8 +159,6 @@ namespace ix
 
     ssize_t Socket::send(char* buffer, size_t length)
     {
-        std::lock_guard<std::mutex> lock(_socketMutex);
-
         int flags = 0;
 #ifdef MSG_NOSIGNAL
         flags = MSG_NOSIGNAL;
@@ -177,8 +174,6 @@ namespace ix
 
     ssize_t Socket::recv(void* buffer, size_t length)
     {
-        std::lock_guard<std::mutex> lock(_socketMutex);
-
         int flags = 0;
 #ifdef MSG_NOSIGNAL
         flags = MSG_NOSIGNAL;

ixwebsocket/IXSocket.h

@@ -41,12 +41,12 @@ namespace ix
 
     enum class PollResultType
     {
-        ReadyForRead = 0,
-        ReadyForWrite = 1,
-        Timeout = 2,
-        Error = 3,
-        SendRequest = 4,
-        CloseRequest = 5
+        ReadyForRead    = 0,
+        ReadyForWrite   = 1,
+        Timeout         = 2,
+        Error           = 3,
+        SendRequest     = 4,
+        CloseRequest    = 5
     };
 
     class Socket {
@@ -56,7 +56,7 @@ namespace ix
         bool init(std::string& errorMsg);
 
         // Functions to check whether there is activity on the socket
-        PollResultType poll(int timeoutSecs = kDefaultPollTimeout);
+        PollResultType poll(int timeoutMs = kDefaultPollTimeout);
         bool wakeUpFromPoll(uint8_t wakeUpCode);
 
         PollResultType isReadyToWrite(int timeoutMs);

ixwebsocket/IXSocketAppleSSL.cpp

@@ -20,8 +20,6 @@
 #include <unistd.h>
 #include <stdint.h>
 
-#include <iostream>
-
 #include <errno.h>
 #define socketerrno errno
 

ixwebsocket/IXSocketAppleSSL.h

@@ -16,7 +16,7 @@
 
 namespace ix
 {
-    class SocketAppleSSL : public Socket
+    class SocketAppleSSL final : public Socket
     {
     public:
         SocketAppleSSL(int fd = -1);

ixwebsocket/IXSocketOpenSSL.cpp

@@ -10,7 +10,6 @@
 #include "IXSocketConnect.h"
 
 #include <cassert>
-#include <iostream>
 
 #include <openssl/x509v3.h>
 

ixwebsocket/IXSocketOpenSSL.h

@@ -19,7 +19,7 @@
 
 namespace ix
 {
-    class SocketOpenSSL : public Socket
+    class SocketOpenSSL final : public Socket
     {
     public:
         SocketOpenSSL(int fd = -1);

ixwebsocket/IXSocketSChannel.h

@@ -10,7 +10,7 @@
 
 namespace ix
 {
-    class SocketSChannel : public Socket
+    class SocketSChannel final : public Socket
     {
     public:
         SocketSChannel();

ixwebsocket/IXSocketServer.cpp

@@ -30,7 +30,9 @@ namespace ix
         _host(host),
         _backlog(backlog),
         _maxConnections(maxConnections),
+        _serverFd(-1),
         _stop(false),
+        _stopGc(false),
         _connectionStateFactory(&ConnectionState::createConnectionState)
     {
 
@@ -124,9 +126,15 @@ namespace ix
 
     void SocketServer::start()
     {
-        if (_thread.joinable()) return; // we've already been started
+        if (!_thread.joinable())
+        {
+            _thread = std::thread(&SocketServer::run, this);
+        }
 
-        _thread = std::thread(&SocketServer::run, this);
+        if (!_gcThread.joinable())
+        {
+            _gcThread = std::thread(&SocketServer::runGC, this);
+        }
     }
 
     void SocketServer::wait()
@@ -142,21 +150,21 @@ namespace ix
 
     void SocketServer::stop()
     {
-        while (true)
+        // Stop accepting connections, and close the 'accept' thread
+        if (_thread.joinable())
         {
-            if (closeTerminatedThreads()) break;
-
-            // wait 10ms and try again later.
-            // we could have a timeout, but if we exit of here
-            // we leaked threads, it is quite bad.
-            std::this_thread::sleep_for(std::chrono::milliseconds(10));
+            _stop = true;
+            _thread.join();
+            _stop = false;
         }
 
-        if (!_thread.joinable()) return; // nothing to do
-
-        _stop = true;
-        _thread.join();
-        _stop = false;
+        // Join all threads and make sure that all connections are terminated
+        if (_gcThread.joinable())
+        {
+            _stopGc = true;
+            _gcThread.join();
+            _stopGc = false;
+        }
 
         _conditionVariable.notify_one();
         Socket::closeSocket(_serverFd);
@@ -175,7 +183,7 @@ namespace ix
     // field becomes true, and we can use that to know that we can join that thread
     // and remove it from our _connectionsThreads data structure (a list).
     //
-    bool SocketServer::closeTerminatedThreads()
+    void SocketServer::closeTerminatedThreads()
     {
         std::lock_guard<std::mutex> lock(_connectionsThreadsMutex);
         auto it = _connectionsThreads.begin();
@@ -195,8 +203,6 @@ namespace ix
             if (thread.joinable()) thread.join();
             it = _connectionsThreads.erase(it);
         }
-
-        return _connectionsThreads.empty();
     }
 
     void SocketServer::run()
@@ -208,12 +214,6 @@ namespace ix
         {
             if (_stop) return;
 
-            // Garbage collection to shutdown/join threads for closed connections.
-            // We could run this in its own thread, so that we dont need to accept
-            // a new connection to close a thread.
-            // We could also use a condition variable to be notify when we need to do this
-            closeTerminatedThreads();
-
             // Use select to check whether a new connection is in progress
             fd_set rfds;
             struct timeval timeout;
@@ -290,5 +290,30 @@ namespace ix
                                 connectionState)));
         }
     }
+
+    size_t SocketServer::getConnectionsThreadsCount()
+    {
+        std::lock_guard<std::mutex> lock(_connectionsThreadsMutex);
+        return _connectionsThreads.size();
+    }
+
+    void SocketServer::runGC()
+    {
+        for (;;)
+        {
+            // Garbage collection to shutdown/join threads for closed connections.
+            closeTerminatedThreads();
+
+            // We quit this thread if all connections are closed and we received
+            // a stop request by setting _stopGc to true.
+            if (_stopGc && getConnectionsThreadsCount() == 0)
+            {
+                break;
+            }
+
+            // Sleep a little bit then keep cleaning up
+            std::this_thread::sleep_for(std::chrono::milliseconds(10));
+        }
+    }
 }
 

ixwebsocket/IXSocketServer.h

@@ -74,6 +74,12 @@ namespace ix
         // background thread to wait for incoming connections
         std::atomic<bool> _stop;
         std::thread _thread;
+        void run();
+
+        // background thread to cleanup (join) terminated threads
+        std::atomic<bool> _stopGc;
+        std::thread _gcThread;
+        void runGC();
 
         // the list of (connectionState, threads) for each connections
         ConnectionThreads _connectionsThreads;
@@ -87,13 +93,12 @@ namespace ix
         // the factory to create ConnectionState objects
         ConnectionStateFactory _connectionStateFactory;
 
-        // Methods
-        void run();
         virtual void handleConnection(int fd,
                                       std::shared_ptr<ConnectionState> connectionState) = 0;
         virtual size_t getConnectedClientsCount() = 0;
 
         // Returns true if all connection threads are joined
-        bool closeTerminatedThreads();
+        void closeTerminatedThreads();
+        size_t getConnectionsThreadsCount();
     };
 }

ixwebsocket/IXUrlParser.cpp

@@ -7,8 +7,6 @@
 #include "IXUrlParser.h"
 #include "LUrlParser.h"
 
-#include <iostream>
-
 namespace ix
 {
     bool UrlParser::parse(const std::string& url,
@@ -66,22 +64,4 @@ namespace ix
         return true;
     }
 
-    void UrlParser::printUrl(const std::string& url)
-    {
-        std::string protocol, host, path, query;
-        int port {0};
-
-        if (!parse(url, protocol, host, path, query, port))
-        {
-            return;
-        }
-
-        std::cout << "[" << url << "]" << std::endl;
-        std::cout << protocol << std::endl;
-        std::cout << host << std::endl;
-        std::cout << port << std::endl;
-        std::cout << path << std::endl;
-        std::cout << query << std::endl;
-        std::cout << "-------------------------------" << std::endl;
-    }
 }

ixwebsocket/IXUrlParser.h

@@ -19,7 +19,5 @@ namespace ix
                           std::string& path,
                           std::string& query,
                           int& port);
-
-        static void printUrl(const std::string& url);
     };
 }

ixwebsocket/IXWebSocket.cpp

@@ -8,22 +8,26 @@
 #include "IXSetThreadName.h"
 #include "IXWebSocketHandshake.h"
 
-#include <iostream>
 #include <cmath>
 #include <cassert>
 
 namespace
 {
-    uint64_t calculateRetryWaitMilliseconds(uint64_t retry_count)
+    uint64_t calculateRetryWaitMilliseconds(uint32_t retry_count)
     {
-        // This will overflow quite fast for large value of retry_count
-        // and will become 0, in which case the wait time will be none
-        // and we'll be constantly retrying to connect.
-        uint64_t wait_time = ((uint64_t) std::pow(2, retry_count) * 100L);
+        uint64_t wait_time;
 
-        // cap the wait time to 10s, or to retry_count == 10 for which wait_time > 10s
-        uint64_t tenSeconds = 10 * 1000;
-        return (wait_time > tenSeconds || retry_count > 10) ? tenSeconds : wait_time;
+        if (retry_count <= 6)
+        {
+            // max wait_time is 6400 ms (2 ^ 6 = 64)
+            wait_time = ((uint64_t)std::pow(2, retry_count) * 100L);
+        }
+        else
+        {
+            wait_time = 10 * 1000; // 10 sec
+        }
+
+        return wait_time;
     }
 }
 
@@ -47,7 +51,7 @@ namespace ix
         _ws.setOnCloseCallback(
             [this](uint16_t code, const std::string& reason, size_t wireSize, bool remote)
             {
-                _onMessageCallback(WebSocket_MessageType_Close, "", wireSize,
+                _onMessageCallback(WebSocketMessageType::Close, "", wireSize,
                                    WebSocketErrorInfo(), WebSocketOpenInfo(),
                                    WebSocketCloseInfo(code, reason, remote));
             }
@@ -140,24 +144,16 @@ namespace ix
 
     void WebSocket::stop()
     {
-        bool automaticReconnection = _automaticReconnection;
-
-        // This value needs to be forced when shutting down, it is restored later
-        _automaticReconnection = false;
-
         close();
 
-        if (!_thread.joinable())
+        if (_thread.joinable())
         {
-            _automaticReconnection = automaticReconnection;
-            return;
+            // wait until working thread will exit
+            // it will exit after close operation is finished
+            _stop = true;
+            _thread.join();
+            _stop = false;
         }
-
-        _stop = true;
-        _thread.join();
-        _stop = false;
-
-        _automaticReconnection = automaticReconnection;
     }
 
     WebSocketInitResult WebSocket::connect(int timeoutSecs)
@@ -176,7 +172,7 @@ namespace ix
             return status;
         }
 
-        _onMessageCallback(WebSocket_MessageType_Open, "", 0,
+        _onMessageCallback(WebSocketMessageType::Open, "", 0,
                            WebSocketErrorInfo(),
                            WebSocketOpenInfo(status.uri, status.headers),
                            WebSocketCloseInfo());
@@ -199,7 +195,7 @@ namespace ix
             return status;
         }
 
-        _onMessageCallback(WebSocket_MessageType_Open, "", 0,
+        _onMessageCallback(WebSocketMessageType::Open, "", 0,
                            WebSocketErrorInfo(),
                            WebSocketOpenInfo(status.uri, status.headers),
                            WebSocketCloseInfo());
@@ -208,75 +204,71 @@ namespace ix
 
     bool WebSocket::isConnected() const
     {
-        return getReadyState() == WebSocket_ReadyState_Open;
+        return getReadyState() == ReadyState::Open;
     }
 
     bool WebSocket::isClosing() const
     {
-        return getReadyState() == WebSocket_ReadyState_Closing;
+        return getReadyState() == ReadyState::Closing;
     }
 
-    void WebSocket::close()
+    void WebSocket::close(uint16_t code,
+                          const std::string& reason)
     {
-        _ws.close();
+        _ws.close(code, reason);
     }
 
-    void WebSocket::reconnectPerpetuallyIfDisconnected()
+    void WebSocket::checkConnection(bool firstConnectionAttempt)
     {
-        uint64_t retries = 0;
-        WebSocketErrorInfo connectErr;
-        ix::WebSocketInitResult status;
         using millis = std::chrono::duration<double, std::milli>;
+
+        uint32_t retries = 0;
         millis duration;
 
-        // Try to connect only once when we don't have automaticReconnection setup
-        if (!isConnected() && !isClosing() && !_stop && !_automaticReconnection)
+        // Try to connect perpertually
+        while (true)
         {
-            status = connect(_handshakeTimeoutSecs);
+            if (isConnected() || isClosing() || _stop)
+            {
+                break;
+            }
+
+            if (!firstConnectionAttempt && !_automaticReconnection)
+            {
+                // Do not attempt to reconnect
+                break;
+            }
+
+            firstConnectionAttempt = false;
+
+            // Only sleep if we are retrying
+            if (duration.count() > 0)
+            {
+                // to do: make sleeping conditional
+                std::this_thread::sleep_for(duration);
+            }
+
+            // Try to connect synchronously
+            ix::WebSocketInitResult status = connect(_handshakeTimeoutSecs);
 
             if (!status.success)
             {
-                duration = millis(calculateRetryWaitMilliseconds(retries++));
+                WebSocketErrorInfo connectErr;
 
-                connectErr.retries = retries;
-                connectErr.wait_time = duration.count();
-                connectErr.reason = status.errorStr;
-                connectErr.http_status = status.http_status;
-                _onMessageCallback(WebSocket_MessageType_Error, "", 0,
-                                   connectErr, WebSocketOpenInfo(),
-                                   WebSocketCloseInfo());
-            }
-        }
-        else
-        {
-            // Otherwise try to reconnect perpertually
-            while (true)
-            {
-                if (isConnected() || isClosing() || _stop || !_automaticReconnection)
-                {
-                    break;
-                }
-
-                status = connect(_handshakeTimeoutSecs);
-
-                if (!status.success)
+                if (_automaticReconnection)
                 {
                     duration = millis(calculateRetryWaitMilliseconds(retries++));
 
-                    connectErr.retries = retries;
                     connectErr.wait_time = duration.count();
-                    connectErr.reason = status.errorStr;
-                    connectErr.http_status = status.http_status;
-                    _onMessageCallback(WebSocket_MessageType_Error, "", 0,
-                                       connectErr, WebSocketOpenInfo(),
-                                       WebSocketCloseInfo());
-
-                    // Only sleep if we aren't in the middle of stopping
-                    if (!_stop)
-                    {
-                        std::this_thread::sleep_for(duration);
-                    }
+                    connectErr.retries = retries;
                 }
+                
+                connectErr.reason      = status.errorStr;
+                connectErr.http_status = status.http_status;
+
+                _onMessageCallback(WebSocketMessageType::Error, "", 0,
+                                   connectErr, WebSocketOpenInfo(),
+                                   WebSocketCloseInfo());
             }
         }
     }
@@ -285,22 +277,27 @@ namespace ix
     {
         setThreadName(getUrl());
 
+        bool firstConnectionAttempt = true;
+
         while (true)
         {
-            if (_stop) return;
-
             // 1. Make sure we are always connected
-            reconnectPerpetuallyIfDisconnected();
+            checkConnection(firstConnectionAttempt);
 
-            if (_stop) return;
+            firstConnectionAttempt = false;
+
+            // if here we are closed then checkConnection was not able to connect
+            if (getReadyState() == ReadyState::Closed)
+            {
+                break;
+            }
 
             // 2. Poll to see if there's any new data available
-            _ws.poll();
-
-            if (_stop) return;
+            WebSocketTransport::PollResult pollResult = _ws.poll();
 
             // 3. Dispatch the incoming messages
             _ws.dispatch(
+                pollResult,
                 [this](const std::string& msg,
                        size_t wireSize,
                        bool decompressionError,
@@ -309,24 +306,25 @@ namespace ix
                     WebSocketMessageType webSocketMessageType;
                     switch (messageKind)
                     {
-                        case WebSocketTransport::MSG:
+                        default:
+                        case WebSocketTransport::MessageKind::MSG:
                         {
-                            webSocketMessageType = WebSocket_MessageType_Message;
+                            webSocketMessageType = WebSocketMessageType::Message;
                         } break;
 
-                        case WebSocketTransport::PING:
+                        case WebSocketTransport::MessageKind::PING:
                         {
-                            webSocketMessageType = WebSocket_MessageType_Ping;
+                            webSocketMessageType = WebSocketMessageType::Ping;
                         } break;
 
-                        case WebSocketTransport::PONG:
+                        case WebSocketTransport::MessageKind::PONG:
                         {
-                            webSocketMessageType = WebSocket_MessageType_Pong;
+                            webSocketMessageType = WebSocketMessageType::Pong;
                         } break;
 
-                        case WebSocketTransport::FRAGMENT:
+                        case WebSocketTransport::MessageKind::FRAGMENT:
                         {
-                            webSocketMessageType = WebSocket_MessageType_Fragment;
+                            webSocketMessageType = WebSocketMessageType::Fragment;
                         } break;
                     }
 
@@ -339,9 +337,6 @@ namespace ix
 
                     WebSocket::invokeTrafficTrackerCallback(msg.size(), true);
                 });
-
-            // If we aren't trying to reconnect automatically, exit if we aren't connected
-            if (!isConnected() && !_automaticReconnection) return;
         }
     }
 
@@ -368,10 +363,10 @@ namespace ix
         }
     }
 
-    WebSocketSendInfo WebSocket::send(const std::string& text,
+    WebSocketSendInfo WebSocket::send(const std::string& data,
                                       const OnProgressCallback& onProgressCallback)
     {
-        return sendMessage(text, SendMessageKind::Binary, onProgressCallback);
+        return sendMessage(data, SendMessageKind::Binary, onProgressCallback);
     }
 
     WebSocketSendInfo WebSocket::sendText(const std::string& text,
@@ -434,11 +429,11 @@ namespace ix
     {
         switch (_ws.getReadyState())
         {
-            case ix::WebSocketTransport::OPEN: return WebSocket_ReadyState_Open;
-            case ix::WebSocketTransport::CONNECTING: return WebSocket_ReadyState_Connecting;
-            case ix::WebSocketTransport::CLOSING: return WebSocket_ReadyState_Closing;
-            case ix::WebSocketTransport::CLOSED: return WebSocket_ReadyState_Closed;
-            default: return WebSocket_ReadyState_Closed;
+            case ix::WebSocketTransport::ReadyState::OPEN      : return ReadyState::Open;
+            case ix::WebSocketTransport::ReadyState::CONNECTING: return ReadyState::Connecting;
+            case ix::WebSocketTransport::ReadyState::CLOSING   : return ReadyState::Closing;
+            case ix::WebSocketTransport::ReadyState::CLOSED    : return ReadyState::Closed;
+            default: return ReadyState::Closed;
         }
     }
 
@@ -446,11 +441,11 @@ namespace ix
     {
         switch (readyState)
         {
-            case WebSocket_ReadyState_Open: return "OPEN";
-            case WebSocket_ReadyState_Connecting: return "CONNECTING";
-            case WebSocket_ReadyState_Closing: return "CLOSING";
-            case WebSocket_ReadyState_Closed: return "CLOSED";
-            default: return "CLOSED";
+            case ReadyState::Open      : return "OPEN";
+            case ReadyState::Connecting: return "CONNECTING";
+            case ReadyState::Closing   : return "CLOSING";
+            case ReadyState::Closed    : return "CLOSED";
+            default: return "UNKNOWN";
         }
     }
 

ixwebsocket/IXWebSocket.h

@@ -24,23 +24,23 @@
 namespace ix
 {
     // https://developer.mozilla.org/en-US/docs/Web/API/WebSocket#Ready_state_constants
-    enum ReadyState
+    enum class ReadyState
     {
-        WebSocket_ReadyState_Connecting = 0,
-        WebSocket_ReadyState_Open = 1,
-        WebSocket_ReadyState_Closing = 2,
-        WebSocket_ReadyState_Closed = 3
+        Connecting     = 0,
+        Open           = 1,
+        Closing        = 2,
+        Closed         = 3
     };
 
-    enum WebSocketMessageType
+    enum class WebSocketMessageType
     {
-        WebSocket_MessageType_Message = 0,
-        WebSocket_MessageType_Open = 1,
-        WebSocket_MessageType_Close = 2,
-        WebSocket_MessageType_Error = 3,
-        WebSocket_MessageType_Ping = 4,
-        WebSocket_MessageType_Pong = 5,
-        WebSocket_MessageType_Fragment = 6
+        Message        = 0,
+        Open           = 1,
+        Close          = 2,
+        Error          = 3,
+        Ping           = 4,
+        Pong           = 5,
+        Fragment       = 6
     };
 
     struct WebSocketOpenInfo
@@ -91,7 +91,6 @@ namespace ix
 
         void setUrl(const std::string& url);
         void setPerMessageDeflateOptions(const WebSocketPerMessageDeflateOptions& perMessageDeflateOptions);
-        void setHandshakeTimeout(int handshakeTimeoutSecs);
         void setHeartBeatPeriod(int heartBeatPeriodSecs);
         void setPingInterval(int pingIntervalSecs); // alias of setHeartBeatPeriod
         void setPingTimeout(int pingTimeoutSecs);
@@ -100,24 +99,32 @@ namespace ix
 
         // Run asynchronously, by calling start and stop.
         void start();
+        // stop is synchronous
         void stop();
 
         // Run in blocking mode, by connecting first manually, and then calling run.
         WebSocketInitResult connect(int timeoutSecs);
         void run();
 
-        WebSocketSendInfo send(const std::string& text,
+        // send binary data
+        WebSocketSendInfo send(const std::string& data,
                                const OnProgressCallback& onProgressCallback = nullptr);
         WebSocketSendInfo sendText(const std::string& text,
                                    const OnProgressCallback& onProgressCallback = nullptr);
         WebSocketSendInfo ping(const std::string& text);
-        void close();
+
+        // A close frame can provide a code and a reason
+        // FIXME: use constants
+        void close(uint16_t code = 1000,
+                   const std::string& reason = "Normal closure");
 
         void setOnMessageCallback(const OnMessageCallback& callback);
         static void setTrafficTrackerCallback(const OnTrafficTrackerCallback& callback);
         static void resetTrafficTrackerCallback();
 
         ReadyState getReadyState() const;
+        static std::string readyStateToString(ReadyState readyState);
+
         const std::string& getUrl() const;
         const WebSocketPerMessageDeflateOptions& getPerMessageDeflateOptions() const;
         int getHeartBeatPeriod() const;
@@ -136,12 +143,10 @@ namespace ix
 
         bool isConnected() const;
         bool isClosing() const;
-        void reconnectPerpetuallyIfDisconnected();
-        std::string readyStateToString(ReadyState readyState);
+        void checkConnection(bool firstConnectionAttempt);
         static void invokeTrafficTrackerCallback(size_t size, bool incoming);
 
         // Server
-        void setSocketFileDescriptor(int fd);
         WebSocketInitResult connectToSocket(int fd, int timeoutSecs);
 
         WebSocketTransport _ws;

ixwebsocket/IXWebSocketErrorInfo.h

@@ -12,10 +12,10 @@ namespace ix
 {
     struct WebSocketErrorInfo
     {
-        uint64_t retries;
-        double wait_time;
-        int http_status;
+        uint32_t retries = 0;
+        double wait_time = 0;
+        int http_status = 0;
         std::string reason;
-        bool decompressionError;
+        bool decompressionError = false;
     };
 }

ixwebsocket/IXWebSocketHandshake.cpp

@@ -10,7 +10,6 @@
 
 #include "libwshandshake.hpp"
 
-#include <iostream>
 #include <sstream>
 #include <random>
 #include <algorithm>

ixwebsocket/IXWebSocketPerMessageDeflateCodec.cpp

@@ -7,7 +7,6 @@
 #include "IXWebSocketPerMessageDeflateCodec.h"
 #include "IXWebSocketPerMessageDeflateOptions.h"
 
-#include <iostream>
 #include <cassert>
 #include <string.h>
 

ixwebsocket/IXWebSocketPerMessageDeflateOptions.cpp

@@ -7,7 +7,6 @@
 #include "IXWebSocketPerMessageDeflateOptions.h"
 
 #include <sstream>
-#include <iostream>
 #include <algorithm>
 #include <cctype>
 

ixwebsocket/IXWebSocketPerMessageDeflateOptions.h

@@ -23,7 +23,6 @@ namespace ix
         WebSocketPerMessageDeflateOptions(std::string extension);
 
         std::string generateHeader();
-        std::string parseHeader();
         bool enabled() const;
         bool getClientNoContextTakeover() const;
         bool getServerNoContextTakeover() const;

ixwebsocket/IXWebSocketSendInfo.h

@@ -6,9 +6,6 @@
 
 #pragma once
 
-#include <string>
-#include <iostream>
-
 namespace ix
 {
     struct WebSocketSendInfo

ixwebsocket/IXWebSocketServer.h

@@ -23,7 +23,7 @@ namespace ix
     using OnConnectionCallback = std::function<void(std::shared_ptr<WebSocket>,
                                                     std::shared_ptr<ConnectionState>)>;
 
-    class WebSocketServer : public SocketServer {
+    class WebSocketServer final : public SocketServer {
     public:
         WebSocketServer(int port = SocketServer::kDefaultPort,
                         const std::string& host = SocketServer::kDefaultHost,

ixwebsocket/IXWebSocketTransport.cpp

@@ -45,7 +45,6 @@
 #include <vector>
 #include <string>
 #include <cstdarg>
-#include <iostream>
 #include <sstream>
 #include <chrono>
 #include <thread>
@@ -72,28 +71,34 @@ namespace ix
     const int WebSocketTransport::kDefaultPingIntervalSecs(-1);
     const int WebSocketTransport::kDefaultPingTimeoutSecs(-1);
     const bool WebSocketTransport::kDefaultEnablePong(true);
+    const int WebSocketTransport::kClosingMaximumWaitingDelayInMs(200);
     constexpr size_t WebSocketTransport::kChunkSize;
+
     const uint16_t WebSocketTransport::kInternalErrorCode(1011);
     const uint16_t WebSocketTransport::kAbnormalCloseCode(1006);
     const uint16_t WebSocketTransport::kProtocolErrorCode(1002);
+    const uint16_t WebSocketTransport::kNoStatusCodeErrorCode(1005);
     const std::string WebSocketTransport::kInternalErrorMessage("Internal error");
     const std::string WebSocketTransport::kAbnormalCloseMessage("Abnormal closure");
     const std::string WebSocketTransport::kPingTimeoutMessage("Ping timeout");
     const std::string WebSocketTransport::kProtocolErrorMessage("Protocol error");
+    const std::string WebSocketTransport::kNoStatusCodeErrorMessage("No status code");
 
     WebSocketTransport::WebSocketTransport() :
         _useMask(true),
-        _readyState(CLOSED),
+        _readyState(ReadyState::CLOSED),
         _closeCode(kInternalErrorCode),
         _closeReason(kInternalErrorMessage),
         _closeWireSize(0),
         _closeRemote(false),
         _enablePerMessageDeflate(false),
         _requestInitCancellation(false),
+        _closingTimePoint(std::chrono::steady_clock::now()),
         _enablePong(kDefaultEnablePong),
         _pingIntervalSecs(kDefaultPingIntervalSecs),
         _pingTimeoutSecs(kDefaultPingTimeoutSecs),
         _pingIntervalOrTimeoutGCDSecs(-1),
+        _nextGCDTimePoint(std::chrono::steady_clock::now()),
         _lastSendPingTimePoint(std::chrono::steady_clock::now()),
         _lastReceivePongTimePoint(std::chrono::steady_clock::now())
     {
@@ -163,7 +168,7 @@ namespace ix
                                                          timeoutSecs);
         if (result.success)
         {
-            setReadyState(OPEN);
+            setReadyState(ReadyState::OPEN);
         }
         return result;
     }
@@ -191,22 +196,22 @@ namespace ix
         auto result = webSocketHandshake.serverHandshake(fd, timeoutSecs);
         if (result.success)
         {
-            setReadyState(OPEN);
+            setReadyState(ReadyState::OPEN);
         }
         return result;
     }
 
-    WebSocketTransport::ReadyStateValues WebSocketTransport::getReadyState() const
+    WebSocketTransport::ReadyState WebSocketTransport::getReadyState() const
     {
         return _readyState;
     }
 
-    void WebSocketTransport::setReadyState(ReadyStateValues readyStateValue)
+    void WebSocketTransport::setReadyState(ReadyState readyState)
     {
         // No state change, return
-        if (_readyState == readyStateValue) return;
+        if (_readyState == readyState) return;
 
-        if (readyStateValue == CLOSED)
+        if (readyState == ReadyState::CLOSED)
         {
             std::lock_guard<std::mutex> lock(_closeDataMutex);
             _onCloseCallback(_closeCode, _closeReason, _closeWireSize, _closeRemote);
@@ -215,8 +220,12 @@ namespace ix
             _closeWireSize = 0;
             _closeRemote = false;
         }
+        else if (readyState == ReadyState::OPEN)
+        {
+            initTimePointsAndGCDAfterConnect();
+        }
 
-        _readyState = readyStateValue;
+        _readyState = readyState;
     }
 
     void WebSocketTransport::setOnCloseCallback(const OnCloseCallback& onCloseCallback)
@@ -224,6 +233,23 @@ namespace ix
         _onCloseCallback = onCloseCallback;
     }
 
+    void WebSocketTransport::initTimePointsAndGCDAfterConnect()
+    {
+        {
+            std::lock_guard<std::mutex> lock(_lastSendPingTimePointMutex);
+            _lastSendPingTimePoint = std::chrono::steady_clock::now();
+        } 
+        {
+            std::lock_guard<std::mutex> lock(_lastReceivePongTimePointMutex);
+            _lastReceivePongTimePoint = std::chrono::steady_clock::now();
+        }
+
+        if (_pingIntervalOrTimeoutGCDSecs > 0)
+        {
+            _nextGCDTimePoint = std::chrono::steady_clock::now() + std::chrono::seconds(_pingIntervalOrTimeoutGCDSecs);
+        }
+    }
+
     // Only consider send PING time points for that computation.
     bool WebSocketTransport::pingIntervalExceeded()
     {
@@ -245,11 +271,16 @@ namespace ix
         return now - _lastReceivePongTimePoint > std::chrono::seconds(_pingTimeoutSecs);
     }
 
-    void WebSocketTransport::poll()
+    bool WebSocketTransport::closingDelayExceeded()
     {
-        PollResultType pollResult = _socket->poll(_pingIntervalOrTimeoutGCDSecs);
+        std::lock_guard<std::mutex> lock(_closingTimePointMutex);
+        auto now = std::chrono::steady_clock::now();
+        return now - _closingTimePoint > std::chrono::milliseconds(kClosingMaximumWaitingDelayInMs);
+    }
 
-        if (_readyState == OPEN)
+    WebSocketTransport::PollResult WebSocketTransport::poll()
+    {
+        if (_readyState == ReadyState::OPEN)
         {
             // if (1) ping timeout is enabled and (2) duration since last received
             // ping response (PONG) exceeds the maximum delay, then close the connection
@@ -266,6 +297,34 @@ namespace ix
                 sendPing(ss.str());
             }
         }
+        
+        // No timeout if state is not OPEN, otherwise computed
+        // pingIntervalOrTimeoutGCD (equals to -1 if no ping and no ping timeout are set)
+        int lastingTimeoutDelayInMs = (_readyState != ReadyState::OPEN) ? 0 : _pingIntervalOrTimeoutGCDSecs;
+
+        if (_pingIntervalOrTimeoutGCDSecs > 0)
+        {
+            // compute lasting delay to wait for next ping / timeout, if at least one set
+            auto now = std::chrono::steady_clock::now();
+
+            if (now >= _nextGCDTimePoint)
+            {
+                _nextGCDTimePoint = now + std::chrono::seconds(_pingIntervalOrTimeoutGCDSecs);
+            
+                lastingTimeoutDelayInMs = _pingIntervalOrTimeoutGCDSecs * 1000;
+            }
+            else 
+            {
+                lastingTimeoutDelayInMs = (int)std::chrono::duration_cast<std::chrono::milliseconds>(_nextGCDTimePoint - now).count();
+            }
+        }
+
+#ifdef _WIN32
+        if (lastingTimeoutDelayInMs <= 0) lastingTimeoutDelayInMs = 20;
+#endif
+
+        // poll the socket
+        PollResultType pollResult = _socket->poll(lastingTimeoutDelayInMs);
 
         // Make sure we send all the buffered data
         // there can be a lot of it for large messages.
@@ -280,7 +339,7 @@ namespace ix
                 if (result == PollResultType::Error)
                 {
                     _socket->close();
-                    setReadyState(CLOSED);
+                    setReadyState(ReadyState::CLOSED);
                     break;
                 }
                 else if (result == PollResultType::ReadyForWrite)
@@ -301,17 +360,12 @@ namespace ix
                 }
                 else if (ret <= 0)
                 {
-                    _rxbuf.clear();
+                    // if there are received data pending to be processed, then delay the abnormal closure
+                    // to after dispatch (other close code/reason could be read from the buffer)
+                    
                     _socket->close();
-                    {
-                        std::lock_guard<std::mutex> lock(_closeDataMutex);
-                        _closeCode = kAbnormalCloseCode;
-                        _closeReason = kAbnormalCloseMessage;
-                        _closeWireSize = 0;
-                        _closeRemote = true;
-                    }
-                    setReadyState(CLOSED);
-                    break;
+
+                    return PollResult::AbnormalClose;
                 }
                 else
                 {
@@ -330,12 +384,15 @@ namespace ix
             _socket->close();
         }
 
-        // Avoid a race condition where we get stuck in select
-        // while closing.
-        if (_readyState == CLOSING)
+        if (_readyState == ReadyState::CLOSING && closingDelayExceeded())
         {
+            _rxbuf.clear();
+            // close code and reason were set when calling close()
             _socket->close();
+            setReadyState(ReadyState::CLOSED);
         }
+
+        return PollResult::Succeeded;
     }
 
     bool WebSocketTransport::isSendBufferEmpty() const
@@ -397,12 +454,13 @@ namespace ix
     // |                     Payload Data continued ...                |
     // +---------------------------------------------------------------+
     //
-    void WebSocketTransport::dispatch(const OnMessageCallback& onMessageCallback)
+    void WebSocketTransport::dispatch(WebSocketTransport::PollResult pollResult,
+                                      const OnMessageCallback& onMessageCallback)
     {
         while (true)
         {
             wsheader_type ws;
-            if (_rxbuf.size() < 2) return; /* Need at least 2 */
+            if (_rxbuf.size() < 2) break; /* Need at least 2 */
             const uint8_t * data = (uint8_t *) &_rxbuf[0]; // peek, but don't consume
             ws.fin = (data[0] & 0x80) == 0x80;
             ws.rsv1 = (data[0] & 0x40) == 0x40;
@@ -410,7 +468,7 @@ namespace ix
             ws.mask = (data[1] & 0x80) == 0x80;
             ws.N0 = (data[1] & 0x7f);
             ws.header_size = 2 + (ws.N0 == 126? 2 : 0) + (ws.N0 == 127? 8 : 0) + (ws.mask? 4 : 0);
-            if (_rxbuf.size() < ws.header_size) return; /* Need: ws.header_size - _rxbuf.size() */
+            if (_rxbuf.size() < ws.header_size) break; /* Need: ws.header_size - _rxbuf.size() */
 
             //
             // Calculate payload length:
@@ -483,7 +541,7 @@ namespace ix
                 //
                 if (ws.fin && _chunks.empty())
                 {
-                    emitMessage(MSG,
+                    emitMessage(MessageKind::MSG,
                                 std::string(_rxbuf.begin()+ws.header_size,
                                             _rxbuf.begin()+ws.header_size+(size_t) ws.N),
                                 ws,
@@ -503,12 +561,12 @@ namespace ix
                                              _rxbuf.begin()+ws.header_size+(size_t)ws.N));
                     if (ws.fin)
                     {
-                        emitMessage(MSG, getMergedChunks(), ws, onMessageCallback);
+                        emitMessage(MessageKind::MSG, getMergedChunks(), ws, onMessageCallback);
                         _chunks.clear();
                     }
                     else
                     {
-                        emitMessage(FRAGMENT, std::string(), ws, onMessageCallback);
+                        emitMessage(MessageKind::FRAGMENT, std::string(), ws, onMessageCallback);
                     }
                 }
             }
@@ -526,7 +584,7 @@ namespace ix
                     sendData(wsheader_type::PONG, pingData, compress);
                 }
 
-                emitMessage(PING, pingData, ws, onMessageCallback);
+                emitMessage(MessageKind::PING, pingData, ws, onMessageCallback);
             }
             else if (ws.opcode == wsheader_type::PONG)
             {
@@ -537,24 +595,62 @@ namespace ix
                 std::lock_guard<std::mutex> lck(_lastReceivePongTimePointMutex);
                 _lastReceivePongTimePoint = std::chrono::steady_clock::now();
 
-                emitMessage(PONG, pongData, ws, onMessageCallback);
+                emitMessage(MessageKind::PONG, pongData, ws, onMessageCallback);
             }
             else if (ws.opcode == wsheader_type::CLOSE)
             {
+                std::string reason;
+                uint16_t code = 0;
+
                 unmaskReceiveBuffer(ws);
 
-                // Extract the close code first, available as the first 2 bytes
-                uint16_t code = 0;
-                code |= ((uint64_t) _rxbuf[ws.header_size])   << 8;
-                code |= ((uint64_t) _rxbuf[ws.header_size+1]) << 0;
+                if (ws.N >= 2)
+                {
+                    // Extract the close code first, available as the first 2 bytes
+                    code |= ((uint64_t) _rxbuf[ws.header_size])   << 8;
+                    code |= ((uint64_t) _rxbuf[ws.header_size+1]) << 0;
 
-                // Get the reason.
-                std::string reason(_rxbuf.begin()+ws.header_size + 2,
-                                   _rxbuf.begin()+ws.header_size + (size_t) ws.N);
+                    // Get the reason.
+                    if (ws.N > 2)
+                    {
+                        reason.assign(_rxbuf.begin()+ws.header_size + 2,
+                                      _rxbuf.begin()+ws.header_size + (size_t) ws.N);
+                    }
+                }
+                else
+                {
+                    // no close code received
+                    code = kNoStatusCodeErrorCode;
+                    reason = kNoStatusCodeErrorMessage;
+                }
 
-                bool remote = true;
+                // We receive a CLOSE frame from remote and are NOT the ones who triggered the close
+                if (_readyState != ReadyState::CLOSING)
+                {
+                    // send back the CLOSE frame
+                    sendCloseFrame(code, reason);
 
-                close(code, reason, _rxbuf.size(), remote);
+                    _socket->wakeUpFromPoll(Socket::kCloseRequest);
+
+                    bool remote = true;
+                    closeSocketAndSwitchToClosedState(code, reason, _rxbuf.size(), remote);
+                }
+                else
+                {
+                    // we got the CLOSE frame answer from our close, so we can close the connection if
+                    // the code/reason are the same
+                    bool identicalReason;
+                    {
+                        std::lock_guard<std::mutex> lock(_closeDataMutex);
+                        identicalReason = _closeCode == code && _closeReason == reason;
+                    }
+
+                    if (identicalReason)
+                    {
+                        bool remote = false;
+                        closeSocketAndSwitchToClosedState(code, reason, _rxbuf.size(), remote);
+                    }
+                }
             }
             else
             {
@@ -567,6 +663,25 @@ namespace ix
             _rxbuf.erase(_rxbuf.begin(),
                          _rxbuf.begin() + ws.header_size + (size_t) ws.N);
         }
+
+        // if an abnormal closure was raised in poll, and nothing else triggered a CLOSED state in
+        // the received and processed data then close the connection
+        if (pollResult == PollResult::AbnormalClose)
+        {
+            _rxbuf.clear();
+
+            // if we previously closed the connection (CLOSING state), then set state to CLOSED (code/reason were set before)
+            if (_readyState == ReadyState::CLOSING)
+            {
+                _socket->close();
+                setReadyState(ReadyState::CLOSED);
+            }
+            // if we weren't closing, then close using abnormal close code and message 
+            else if (_readyState != ReadyState::CLOSED)
+            {
+                closeSocketAndSwitchToClosedState(kAbnormalCloseCode, kAbnormalCloseMessage, 0, false);
+            }
+        }
     }
 
     std::string WebSocketTransport::getMergedChunks() const
@@ -597,7 +712,7 @@ namespace ix
         size_t wireSize = message.size();
 
         // When the RSV1 bit is 1 it means the message is compressed
-        if (_enablePerMessageDeflate && ws.rsv1 && messageKind != FRAGMENT)
+        if (_enablePerMessageDeflate && ws.rsv1 && messageKind != MessageKind::FRAGMENT)
         {
             std::string decompressedMessage;
             bool success = _perMessageDeflate.decompress(message, decompressedMessage);
@@ -624,7 +739,7 @@ namespace ix
         bool compress,
         const OnProgressCallback& onProgressCallback)
     {
-        if (_readyState == CLOSING || _readyState == CLOSED)
+        if (_readyState != ReadyState::OPEN)
         {
             return WebSocketSendInfo();
         }
@@ -850,7 +965,7 @@ namespace ix
             {
                 _socket->close();
 
-                setReadyState(CLOSED);
+                setReadyState(ReadyState::CLOSED);
                 break;
             }
             else
@@ -860,29 +975,32 @@ namespace ix
         }
     }
 
-    void WebSocketTransport::close(uint16_t code, const std::string& reason, size_t closeWireSize, bool remote)
+    void WebSocketTransport::sendCloseFrame(uint16_t code, const std::string& reason)
     {
-        _requestInitCancellation = true;
-
-        if (_readyState == CLOSING || _readyState == CLOSED) return;
-
-        // See list of close events here:
-        // https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent
-
-        int codeLength = 2;
-        std::string closure{(char)(code >> 8), (char)(code & 0xff)};
-        closure.resize(codeLength + reason.size());
-
-        // copy reason after code
-        closure.replace(codeLength, reason.size(), reason);
-
         bool compress = false;
-        sendData(wsheader_type::CLOSE, closure, compress);
-        setReadyState(CLOSING);
 
-        _socket->wakeUpFromPoll(Socket::kCloseRequest);
+        // if a status is set/was read
+        if (code != kNoStatusCodeErrorCode)
+        {
+            // See list of close events here:
+            // https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent
+            std::string closure{(char)(code >> 8), (char)(code & 0xff)};
+
+            // copy reason after code
+            closure.append(reason);
+
+            sendData(wsheader_type::CLOSE, closure, compress);
+        }
+        else
+        {
+            // no close code/reason set
+            sendData(wsheader_type::CLOSE, "", compress);
+        }
+    }
+
+    void WebSocketTransport::closeSocketAndSwitchToClosedState(uint16_t code, const std::string& reason, size_t closeWireSize, bool remote)
+    {
         _socket->close();
-
         {
             std::lock_guard<std::mutex> lock(_closeDataMutex);
             _closeCode = code;
@@ -890,8 +1008,31 @@ namespace ix
             _closeWireSize = closeWireSize;
             _closeRemote = remote;
         }
+        setReadyState(ReadyState::CLOSED);
+    }
 
-        setReadyState(CLOSED);
+    void WebSocketTransport::close(uint16_t code, const std::string& reason, size_t closeWireSize, bool remote)
+    {
+        _requestInitCancellation = true;
+
+        if (_readyState == ReadyState::CLOSING || _readyState == ReadyState::CLOSED) return;
+
+        sendCloseFrame(code, reason);
+        {
+            std::lock_guard<std::mutex> lock(_closeDataMutex);
+            _closeCode = code;
+            _closeReason = reason;
+            _closeWireSize = closeWireSize;
+            _closeRemote = remote;
+        }
+        {
+            std::lock_guard<std::mutex> lock(_closingTimePointMutex);
+            _closingTimePoint = std::chrono::steady_clock::now();
+        }
+        setReadyState(ReadyState::CLOSING);
+
+        // wake up the poll, but do not close yet
+        _socket->wakeUpFromPoll(Socket::kSendRequest);
     }
 
     size_t WebSocketTransport::bufferedAmount() const

ixwebsocket/IXWebSocketTransport.h

@@ -40,7 +40,7 @@ namespace ix
     class WebSocketTransport
     {
     public:
-        enum ReadyStateValues
+        enum class ReadyState
         {
             CLOSING,
             CLOSED,
@@ -48,7 +48,7 @@ namespace ix
             OPEN
         };
 
-        enum MessageKind
+        enum class MessageKind
         {
             MSG,
             PING,
@@ -56,6 +56,12 @@ namespace ix
             FRAGMENT
         };
 
+        enum class PollResult
+        {
+            Succeeded,
+            AbnormalClose
+        };
+
         using OnMessageCallback = std::function<void(const std::string&,
                                                      size_t,
                                                      bool,
@@ -78,7 +84,7 @@ namespace ix
         WebSocketInitResult connectToSocket(int fd,              // Server
                                             int timeoutSecs);
 
-        void poll();
+        PollResult poll();
         WebSocketSendInfo sendBinary(const std::string& message,
                                      const OnProgressCallback& onProgressCallback);
         WebSocketSendInfo sendText(const std::string& message,
@@ -90,10 +96,11 @@ namespace ix
                    size_t closeWireSize = 0,
                    bool remote = false);
 
-        ReadyStateValues getReadyState() const;
-        void setReadyState(ReadyStateValues readyStateValue);
+        ReadyState getReadyState() const;
+        void setReadyState(ReadyState readyState);
         void setOnCloseCallback(const OnCloseCallback& onCloseCallback);
-        void dispatch(const OnMessageCallback& onMessageCallback);
+        void dispatch(PollResult pollResult,
+                      const OnMessageCallback& onMessageCallback);
         size_t bufferedAmount() const;
 
     private:
@@ -106,11 +113,11 @@ namespace ix
             bool mask;
             enum opcode_type {
                 CONTINUATION = 0x0,
-                TEXT_FRAME = 0x1,
+                TEXT_FRAME   = 0x1,
                 BINARY_FRAME = 0x2,
-                CLOSE = 8,
-                PING = 9,
-                PONG = 0xa,
+                CLOSE        = 8,
+                PING         = 9,
+                PONG         = 0xa,
             } opcode;
             int N0;
             uint64_t N;
@@ -146,7 +153,7 @@ namespace ix
         std::shared_ptr<Socket> _socket;
 
         // Hold the state of the connection (OPEN, CLOSED, etc...)
-        std::atomic<ReadyStateValues> _readyState;
+        std::atomic<ReadyState> _readyState;
 
         OnCloseCallback _onCloseCallback;
         uint16_t _closeCode;
@@ -162,18 +169,24 @@ namespace ix
 
         // Used to cancel dns lookup + socket connect + http upgrade
         std::atomic<bool> _requestInitCancellation;
+              
+        mutable std::mutex _closingTimePointMutex;
+        std::chrono::time_point<std::chrono::steady_clock>_closingTimePoint;
+        static const int kClosingMaximumWaitingDelayInMs;
 
         // Constants for dealing with closing conneections
         static const uint16_t kInternalErrorCode;
         static const uint16_t kAbnormalCloseCode;
         static const uint16_t kProtocolErrorCode;
+        static const uint16_t kNoStatusCodeErrorCode;
         static const std::string kInternalErrorMessage;
         static const std::string kAbnormalCloseMessage;
         static const std::string kPingTimeoutMessage;
         static const std::string kProtocolErrorMessage;
+        static const std::string kNoStatusCodeErrorMessage;
 
         // enable auto response to ping
-        bool _enablePong;
+        std::atomic<bool> _enablePong;
         static const bool kDefaultEnablePong;
 
         // Optional ping and pong timeout
@@ -187,6 +200,9 @@ namespace ix
         static const int kDefaultPingTimeoutSecs;
         static const std::string kPingMessage;
 
+        // Record time step for ping/ ping timeout to ensure we wait for the right left duration
+        std::chrono::time_point<std::chrono::steady_clock> _nextGCDTimePoint;
+
         // We record when ping are being sent so that we can know when to send the next one
         // We also record when pong are being sent as a reply to pings, to close the connections
         // if no pong were received sufficiently fast.
@@ -201,6 +217,18 @@ namespace ix
         // No PONG data was received through the socket for longer than ping timeout delay
         bool pingTimeoutExceeded();
 
+        // after calling close(), if no CLOSE frame answer is received back from the remote, we should close the connexion
+        bool closingDelayExceeded();
+
+        void initTimePointsAndGCDAfterConnect();
+
+        void sendCloseFrame(uint16_t code, const std::string& reason);
+
+        void closeSocketAndSwitchToClosedState(uint16_t code,
+                                               const std::string& reason,
+                                               size_t closeWireSize,
+                                               bool remote);
+
         void sendOnSocket();
         WebSocketSendInfo sendData(wsheader_type::opcode_type type,
                                    const std::string& message,

ixwebsocket/LUrlParser.cpp

@@ -255,8 +255,6 @@ LUrlParser::clParseURL LUrlParser::clParseURL::ParseURL( const std::string& URL
 		while ( *LocalString ) LocalString++;
 
 		Result.m_Fragment = std::string( CurrentString, LocalString - CurrentString );
-
-		CurrentString = LocalString;
 	}
 
 	Result.m_ErrorCode = LUrlParserError_Ok;

ixwebsocket/windows/IXSetThreadName_windows.cpp

@@ -4,13 +4,41 @@
  *  Copyright (c) 2019 Machine Zone, Inc. All rights reserved.
  */
 #include "../IXSetThreadName.h"
-#include <iostream>
+#include <Windows.h>
 
 namespace ix
 {
+    const DWORD MS_VC_EXCEPTION = 0x406D1388;
+
+#pragma pack(push,8)
+    typedef struct tagTHREADNAME_INFO
+    {
+        DWORD dwType;     // Must be 0x1000.
+        LPCSTR szName;    // Pointer to name (in user addr space).
+        DWORD dwThreadID; // Thread ID (-1=caller thread).
+        DWORD dwFlags;    // Reserved for future use, must be zero.
+    } THREADNAME_INFO;
+#pragma pack(pop)
+
+    void SetThreadName(DWORD dwThreadID, const char* threadName)
+    {
+        THREADNAME_INFO info;
+        info.dwType = 0x1000;
+        info.szName = threadName;
+        info.dwThreadID = dwThreadID;
+        info.dwFlags = 0;
+
+        __try
+        {
+            RaiseException(MS_VC_EXCEPTION, 0, sizeof(info) / sizeof(ULONG_PTR), (ULONG_PTR*)& info);
+        }
+        __except (EXCEPTION_EXECUTE_HANDLER)
+        {
+        }
+    }
+
     void setThreadName(const std::string& name)
     {
-        // FIXME
-        std::cerr << "setThreadName not implemented on Windows yet" << std::endl;
+        SetThreadName(-1, name.c_str());
     }
 }

test/.gitignore

@@ -1,9 +1,10 @@
 CMakeCache.txt
 package-lock.json
-CMakeFiles		
-ixwebsocket_unittest	
-cmake_install.cmake	
+CMakeFiles
+ixwebsocket_unittest
+cmake_install.cmake
 node_modules
 ixwebsocket
 Makefile
 build
+ixwebsocket_unittest.xml

test/CMakeLists.txt

@@ -5,12 +5,11 @@
 cmake_minimum_required (VERSION 3.4.1)
 project (ixwebsocket_unittest)
 
-set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/../third_party/sanitizers-cmake/cmake" ${CMAKE_MODULE_PATH})
-find_package(Sanitizers)
-
 set (CMAKE_CXX_STANDARD 14)
 
-if (NOT WIN32)
+if (UNIX)
+  set(CMAKE_MODULE_PATH "${CMAKE_SOURCE_DIR}/../third_party/sanitizers-cmake/cmake" ${CMAKE_MODULE_PATH})
+  find_package(Sanitizers)
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread")
   set(CMAKE_LD_FLAGS "${CMAKE_CXX_FLAGS} -fsanitize=thread")
   option(USE_TLS "Add TLS support" ON)
@@ -21,6 +20,8 @@ add_subdirectory(${PROJECT_SOURCE_DIR}/.. ixwebsocket)
 include_directories(
   ${PROJECT_SOURCE_DIR}/Catch2/single_include
   ../third_party/msgpack11
+  ../third_party/spdlog/include
+  ../ws
 )
 
 # Shared sources
@@ -28,6 +29,7 @@ set (SOURCES
   test_runner.cpp
   IXTest.cpp
   ../third_party/msgpack11/msgpack11.cpp
+  ../ws/ixcore/utils/IXCoreLogger.cpp
 
   IXDNSLookupTest.cpp
   IXSocketTest.cpp
@@ -36,18 +38,24 @@ set (SOURCES
   IXWebSocketPingTest.cpp
   IXWebSocketTestConnectionDisconnection.cpp
   IXUrlParserTest.cpp
+  IXWebSocketServerTest.cpp
+  IXWebSocketPingTest.cpp
 )
 
 # Some unittest don't work on windows yet
-if (NOT WIN32)
+if (UNIX)
   list(APPEND SOURCES
-    IXWebSocketPingTimeoutTest.cpp
+    # IXWebSocketPingTimeoutTest.cpp # This test isn't reliable # (multiple platforms), disabling in master
+    # IXWebSocketCloseTest.cpp       # 
     cmd_websocket_chat.cpp
   )
 endif()
 
 add_executable(ixwebsocket_unittest ${SOURCES})
-add_sanitizers(ixwebsocket_unittest)
+
+if (UNIX)
+  add_sanitizers(ixwebsocket_unittest)
+endif()
 
 if (APPLE AND USE_TLS)
     target_link_libraries(ixwebsocket_unittest "-framework foundation" "-framework security")

test/IXTest.h

@@ -27,15 +27,6 @@ namespace ix
     struct Logger
     {
         public:
-            Logger& operator<<(const std::string& msg)
-            {
-                std::lock_guard<std::mutex> lock(_mutex);
-
-                std::cerr << msg;
-                std::cerr << std::endl;
-                return *this;
-            }
-
             template <typename T>
             Logger& operator<<(T const& obj)
             {

test/IXWebSocketCloseTest.cpp

@@ -0,0 +1,407 @@
+/*
+ *  IXWebSocketCloseTest.cpp
+ *  Author: Alexandre Konieczny
+ *  Copyright (c) 2019 Machine Zone. All rights reserved.
+ */
+
+#include <iostream>
+#include <sstream>
+#include <queue>
+#include <ixwebsocket/IXWebSocket.h>
+#include <ixwebsocket/IXWebSocketServer.h>
+
+#include "IXTest.h"
+
+#include "catch.hpp"
+
+using namespace ix;
+
+namespace
+{
+    class WebSocketClient
+    {
+        public:
+            WebSocketClient(int port);
+
+            void subscribe(const std::string& channel);
+            void start();
+            void stop();
+            void stop(uint16_t code, const std::string& reason);
+            bool isReady() const;
+            void sendMessage(const std::string& text);
+
+            uint16_t getCloseCode();
+            const std::string& getCloseReason();
+            bool getCloseRemote();
+
+        private:
+            ix::WebSocket _webSocket;
+            int _port;
+
+            mutable std::mutex _mutexCloseData;
+            uint16_t _closeCode;
+            std::string _closeReason;
+            bool _closeRemote;
+    };
+
+    WebSocketClient::WebSocketClient(int port)
+        : _port(port)
+        , _closeCode(0)
+        , _closeReason(std::string(""))
+        , _closeRemote(false)
+    {
+        ;
+    }
+
+    bool WebSocketClient::isReady() const
+    {
+        return _webSocket.getReadyState() == ix::ReadyState::Open;
+    }
+
+    uint16_t WebSocketClient::getCloseCode()
+    {
+        std::lock_guard<std::mutex> lck(_mutexCloseData);
+        
+        return _closeCode;
+    }
+
+    const std::string& WebSocketClient::getCloseReason()
+    {
+        std::lock_guard<std::mutex> lck(_mutexCloseData);
+
+        return _closeReason;
+    }
+
+    bool WebSocketClient::getCloseRemote()
+    {
+        std::lock_guard<std::mutex> lck(_mutexCloseData);
+        
+        return _closeRemote;
+    }
+
+    void WebSocketClient::stop()
+    {
+        _webSocket.stop();
+    }
+
+    void WebSocketClient::stop(uint16_t code, const std::string& reason)
+    {
+        _webSocket.close(code, reason);
+        _webSocket.stop();
+    }
+
+    void WebSocketClient::start()
+    {
+        std::string url;
+        {
+            std::stringstream ss;
+            ss << "ws://localhost:"
+               << _port
+               << "/";
+
+            url = ss.str();
+        }
+
+        _webSocket.setUrl(url);
+
+        std::stringstream ss;
+        log(std::string("Connecting to url: ") + url);
+
+        _webSocket.setOnMessageCallback(
+            [this](ix::WebSocketMessageType messageType,
+               const std::string& str,
+               size_t wireSize,
+               const ix::WebSocketErrorInfo& error,
+               const ix::WebSocketOpenInfo& openInfo,
+                   const ix::WebSocketCloseInfo& closeInfo)
+            {
+                std::stringstream ss;
+                if (messageType == ix::WebSocketMessageType::Open)
+                {
+                    log("client connected");
+
+                    _webSocket.disableAutomaticReconnection();
+                }
+                else if (messageType == ix::WebSocketMessageType::Close)
+                {
+                    log("client disconnected");
+
+                    std::lock_guard<std::mutex> lck(_mutexCloseData);
+                    
+                    _closeCode = closeInfo.code;
+                    _closeReason = std::string(closeInfo.reason);
+                    _closeRemote = closeInfo.remote;
+                    
+                    _webSocket.disableAutomaticReconnection();
+                }
+                else if (messageType == ix::WebSocketMessageType::Error)
+                {
+                    ss << "Error ! " << error.reason;
+                    log(ss.str());
+
+                    _webSocket.disableAutomaticReconnection();
+                }
+                else if (messageType == ix::WebSocketMessageType::Pong)
+                {
+                    ss << "Received pong message " << str;
+                    log(ss.str());
+                }
+                else if (messageType == ix::WebSocketMessageType::Ping)
+                {
+                    ss << "Received ping message " << str;
+                    log(ss.str());
+                }
+                else if (messageType == ix::WebSocketMessageType::Message)
+                {
+                    ss << "Received message " << str;
+                    log(ss.str());
+                }
+                else
+                {
+                    ss << "Invalid ix::WebSocketMessageType";
+                    log(ss.str());
+                }
+            });
+
+        _webSocket.start();
+    }
+
+    void WebSocketClient::sendMessage(const std::string& text)
+    {
+        _webSocket.send(text);
+    }
+
+    bool startServer(ix::WebSocketServer& server,
+                     uint16_t& receivedCloseCode,
+                     std::string& receivedCloseReason,
+                     bool& receivedCloseRemote,
+                     std::mutex& mutexWrite)
+    {
+        // A dev/null server
+        server.setOnConnectionCallback(
+            [&server, &receivedCloseCode, &receivedCloseReason, &receivedCloseRemote, &mutexWrite](std::shared_ptr<ix::WebSocket> webSocket,
+                                             std::shared_ptr<ConnectionState> connectionState)
+            {
+                webSocket->setOnMessageCallback(
+                    [webSocket, connectionState, &server, &receivedCloseCode, &receivedCloseReason, &receivedCloseRemote, &mutexWrite](ix::WebSocketMessageType messageType,
+                       const std::string& str,
+                       size_t wireSize,
+                       const ix::WebSocketErrorInfo& error,
+                       const ix::WebSocketOpenInfo& openInfo,
+                       const ix::WebSocketCloseInfo& closeInfo)
+                    {
+                        if (messageType == ix::WebSocketMessageType::Open)
+                        {
+                            Logger() << "New server connection";
+                            Logger() << "id: " << connectionState->getId();
+                            Logger() << "Uri: " << openInfo.uri;
+                            Logger() << "Headers:";
+                            for (auto it : openInfo.headers)
+                            {
+                                Logger() << it.first << ": " << it.second;
+                            }
+                        }
+                        else if (messageType == ix::WebSocketMessageType::Close)
+                        {
+                            log("Server closed connection");
+
+                            //Logger() << closeInfo.code;
+                            //Logger() << closeInfo.reason;
+                            //Logger() << closeInfo.remote;
+
+                            std::lock_guard<std::mutex> lck(mutexWrite);
+                            
+                            receivedCloseCode = closeInfo.code;
+                            receivedCloseReason = std::string(closeInfo.reason);
+                            receivedCloseRemote = closeInfo.remote;
+                        }
+                    }
+                );
+            }
+        );
+
+        auto res = server.listen();
+        if (!res.first)
+        {
+            log(res.second);
+            return false;
+        }
+
+        server.start();
+        return true;
+    }
+}
+
+TEST_CASE("Websocket_client_close_default", "[close]")
+{
+    SECTION("Make sure that close code and reason was used and sent to server.")
+    {
+        ix::setupWebSocketTrafficTrackerCallback();
+
+        int port = getFreePort();
+        ix::WebSocketServer server(port);
+        
+        uint16_t serverReceivedCloseCode(0);
+        bool serverReceivedCloseRemote(false);
+        std::string serverReceivedCloseReason("");
+        std::mutex mutexWrite;
+
+        REQUIRE(startServer(server, serverReceivedCloseCode, serverReceivedCloseReason, serverReceivedCloseRemote, mutexWrite));
+
+        std::string session = ix::generateSessionId();
+        WebSocketClient webSocketClient(port);
+
+        webSocketClient.start();
+
+        // Wait for all chat instance to be ready
+        while (true)
+        {
+            if (webSocketClient.isReady()) break;
+            ix::msleep(10);
+        }
+
+        REQUIRE(server.getClients().size() == 1);
+
+        ix::msleep(100);
+
+        webSocketClient.stop();
+
+        ix::msleep(200);
+
+        // ensure client close is the same as values given
+        REQUIRE(webSocketClient.getCloseCode() == 1000);
+        REQUIRE(webSocketClient.getCloseReason() == "Normal closure");
+        REQUIRE(webSocketClient.getCloseRemote() == false);
+
+        {
+            std::lock_guard<std::mutex> lck(mutexWrite);
+            
+            // Here we read the code/reason received by the server, and ensure that remote is true
+            REQUIRE(serverReceivedCloseCode == 1000);
+            REQUIRE(serverReceivedCloseReason == "Normal closure");
+            REQUIRE(serverReceivedCloseRemote == true);
+        }
+
+        // Give us 1000ms for the server to notice that clients went away
+        ix::msleep(1000);
+        REQUIRE(server.getClients().size() == 0);
+
+        ix::reportWebSocketTraffic();
+    }
+}
+
+TEST_CASE("Websocket_client_close_params_given", "[close]")
+{
+    SECTION("Make sure that close code and reason was used and sent to server.")
+    {
+        ix::setupWebSocketTrafficTrackerCallback();
+
+        int port = getFreePort();
+        ix::WebSocketServer server(port);
+        
+        uint16_t serverReceivedCloseCode(0);
+        bool serverReceivedCloseRemote(false);
+        std::string serverReceivedCloseReason("");
+        std::mutex mutexWrite;
+
+        REQUIRE(startServer(server, serverReceivedCloseCode, serverReceivedCloseReason, serverReceivedCloseRemote, mutexWrite));
+
+        std::string session = ix::generateSessionId();
+        WebSocketClient webSocketClient(port);
+
+        webSocketClient.start();
+
+        // Wait for all chat instance to be ready
+        while (true)
+        {
+            if (webSocketClient.isReady()) break;
+            ix::msleep(10);
+        }
+
+        REQUIRE(server.getClients().size() == 1);
+
+        ix::msleep(100);
+
+        webSocketClient.stop(4000, "My reason");
+
+        ix::msleep(500);
+
+        // ensure client close is the same as values given
+        REQUIRE(webSocketClient.getCloseCode() == 4000);
+        REQUIRE(webSocketClient.getCloseReason() == "My reason");
+        REQUIRE(webSocketClient.getCloseRemote() == false);
+
+        {
+            std::lock_guard<std::mutex> lck(mutexWrite);
+            
+            // Here we read the code/reason received by the server, and ensure that remote is true
+            REQUIRE(serverReceivedCloseCode == 4000);
+            REQUIRE(serverReceivedCloseReason == "My reason");
+            REQUIRE(serverReceivedCloseRemote == true);
+        }
+
+        // Give us 1000ms for the server to notice that clients went away
+        ix::msleep(1000);
+        REQUIRE(server.getClients().size() == 0);
+
+        ix::reportWebSocketTraffic();
+    }
+}
+
+TEST_CASE("Websocket_server_close", "[close]")
+{
+    SECTION("Make sure that close code and reason was read from server.")
+    {
+        ix::setupWebSocketTrafficTrackerCallback();
+
+        int port = getFreePort();
+        ix::WebSocketServer server(port);
+        
+        uint16_t serverReceivedCloseCode(0);
+        bool serverReceivedCloseRemote(false);
+        std::string serverReceivedCloseReason("");
+        std::mutex mutexWrite;
+
+        REQUIRE(startServer(server, serverReceivedCloseCode, serverReceivedCloseReason, serverReceivedCloseRemote, mutexWrite));
+
+        std::string session = ix::generateSessionId();
+        WebSocketClient webSocketClient(port);
+
+        webSocketClient.start();
+
+        // Wait for all chat instance to be ready
+        while (true)
+        {
+            if (webSocketClient.isReady()) break;
+            ix::msleep(10);
+        }
+
+        REQUIRE(server.getClients().size() == 1);
+
+        ix::msleep(200);
+
+        server.stop();
+
+        ix::msleep(500);
+
+        // ensure client close is the same as values given
+        REQUIRE(webSocketClient.getCloseCode() == 1000);
+        REQUIRE(webSocketClient.getCloseReason() == "Normal closure");
+        REQUIRE(webSocketClient.getCloseRemote() == true);
+
+        {
+            std::lock_guard<std::mutex> lck(mutexWrite);
+            
+            // Here we read the code/reason received by the server, and ensure that remote is true
+            REQUIRE(serverReceivedCloseCode == 1000);
+            REQUIRE(serverReceivedCloseReason == "Normal closure");
+            REQUIRE(serverReceivedCloseRemote == false);
+        }
+
+        // Give us 1000ms for the server to notice that clients went away
+        ix::msleep(1000);
+        REQUIRE(server.getClients().size() == 0);
+
+        ix::reportWebSocketTraffic();
+    }
+}

test/IXWebSocketPingTest.cpp

@@ -43,7 +43,7 @@ namespace
 
     bool WebSocketClient::isReady() const
     {
-        return _webSocket.getReadyState() == ix::WebSocket_ReadyState_Open;
+        return _webSocket.getReadyState() == ix::ReadyState::Open;
     }
 
     void WebSocketClient::stop()
@@ -68,9 +68,13 @@ namespace
         // The important bit for this test.
         // Set a 1 second heartbeat with the setter method to test
         if (_useHeartBeatMethod)
+        {
             _webSocket.setHeartBeatPeriod(1);
+        }
         else
+        {
             _webSocket.setPingInterval(1);
+        }
 
         std::stringstream ss;
         log(std::string("Connecting to url: ") + url);
@@ -84,33 +88,32 @@ namespace
                    const ix::WebSocketCloseInfo& closeInfo)
             {
                 std::stringstream ss;
-                if (messageType == ix::WebSocket_MessageType_Open)
+                if (messageType == ix::WebSocketMessageType::Open)
                 {
                     log("client connected");
                 }
-                else if (messageType == ix::WebSocket_MessageType_Close)
+                else if (messageType == ix::WebSocketMessageType::Close)
                 {
                     log("client disconnected");
                 }
-                else if (messageType == ix::WebSocket_MessageType_Error)
+                else if (messageType == ix::WebSocketMessageType::Error)
                 {
                     ss << "Error ! " << error.reason;
                     log(ss.str());
                 }
-                else if (messageType == ix::WebSocket_MessageType_Pong)
+                else if (messageType == ix::WebSocketMessageType::Pong)
                 {
                     ss << "Received pong message " << str;
                     log(ss.str());
                 }
-                else if (messageType == ix::WebSocket_MessageType_Ping)
+                else if (messageType == ix::WebSocketMessageType::Ping)
                 {
                     ss << "Received ping message " << str;
                     log(ss.str());
                 }
-                else if (messageType == ix::WebSocket_MessageType_Message)
+                else if (messageType == ix::WebSocketMessageType::Message)
                 {
-                    ss << "Received message " << str;
-                    log(ss.str());
+                    // too many messages to log
                 }
                 else
                 {
@@ -142,7 +145,7 @@ namespace
                        const ix::WebSocketOpenInfo& openInfo,
                        const ix::WebSocketCloseInfo& closeInfo)
                     {
-                        if (messageType == ix::WebSocket_MessageType_Open)
+                        if (messageType == ix::WebSocketMessageType::Open)
                         {
                             Logger() << "New server connection";
                             Logger() << "id: " << connectionState->getId();
@@ -153,15 +156,23 @@ namespace
                                 Logger() << it.first << ": " << it.second;
                             }
                         }
-                        else if (messageType == ix::WebSocket_MessageType_Close)
+                        else if (messageType == ix::WebSocketMessageType::Close)
                         {
                             log("Server closed connection");
                         }
-                        else if (messageType == ix::WebSocket_MessageType_Ping)
+                        else if (messageType == ix::WebSocketMessageType::Ping)
                         {
                             log("Server received a ping");
                             receivedPingMessages++;
                         }
+                        else if (messageType == ix::WebSocketMessageType::Message)
+                        {
+                            // to many messages to log
+                            for(auto client: server.getClients())
+                            {
+                                client->sendText("reply");
+                            }
+                        }
                     }
                 );
             }
@@ -179,96 +190,6 @@ namespace
     }
 }
 
-TEST_CASE("Websocket_ping_no_data_sent_setHeartBeatPeriod", "[setHeartBeatPeriod]")
-{
-    SECTION("Make sure that ping messages are sent when no other data are sent.")
-    {
-        ix::setupWebSocketTrafficTrackerCallback();
-
-        int port = getFreePort();
-        ix::WebSocketServer server(port);
-        std::atomic<int> serverReceivedPingMessages(0);
-        REQUIRE(startServer(server, serverReceivedPingMessages));
-
-        std::string session = ix::generateSessionId();
-        bool useSetHeartBeatPeriodMethod = true;
-        WebSocketClient webSocketClient(port, useSetHeartBeatPeriodMethod);
-
-        webSocketClient.start();
-
-        // Wait for all chat instance to be ready
-        while (true)
-        {
-            if (webSocketClient.isReady()) break;
-            ix::msleep(10);
-        }
-
-        REQUIRE(server.getClients().size() == 1);
-
-        ix::msleep(1900);
-
-        webSocketClient.stop();
-
-
-        // Here we test ping interval
-        // -> expected ping messages == 1 as 1900 seconds, 1 ping sent every second
-        REQUIRE(serverReceivedPingMessages == 1);
-
-        // Give us 500ms for the server to notice that clients went away
-        ix::msleep(500);
-        REQUIRE(server.getClients().size() == 0);
-
-        ix::reportWebSocketTraffic();
-    }
-}
-
-TEST_CASE("Websocket_ping_data_sent_setHeartBeatPeriod", "[setHeartBeatPeriod]")
-{
-    SECTION("Make sure that ping messages are sent, even if other messages are sent")
-    {
-        ix::setupWebSocketTrafficTrackerCallback();
-
-        int port = getFreePort();
-        ix::WebSocketServer server(port);
-        std::atomic<int> serverReceivedPingMessages(0);
-        REQUIRE(startServer(server, serverReceivedPingMessages));
-
-        std::string session = ix::generateSessionId();
-        bool useSetHeartBeatPeriodMethod = true;
-        WebSocketClient webSocketClient(port, useSetHeartBeatPeriodMethod);
-
-        webSocketClient.start();
-
-        // Wait for all chat instance to be ready
-        while (true)
-        {
-            if (webSocketClient.isReady()) break;
-            ix::msleep(10);
-        }
-
-        REQUIRE(server.getClients().size() == 1);
-
-        ix::msleep(900);
-        webSocketClient.sendMessage("hello world");
-        ix::msleep(900);
-        webSocketClient.sendMessage("hello world");
-        ix::msleep(1100);
-
-        webSocketClient.stop();
-
-        // Here we test ping interval
-        // client has sent data, but ping should have been sent no matter what
-        // -> expected ping messages == 2 as 900+900+1100 = 2900 seconds, 1 ping sent every second
-        REQUIRE(serverReceivedPingMessages == 2);
-
-        // Give us 500ms for the server to notice that clients went away
-        ix::msleep(500);
-        REQUIRE(server.getClients().size() == 0);
-
-        ix::reportWebSocketTraffic();
-    }
-}
-
 TEST_CASE("Websocket_ping_no_data_sent_setPingInterval", "[setPingInterval]")
 {
     SECTION("Make sure that ping messages are sent when no other data are sent.")
@@ -346,9 +267,6 @@ TEST_CASE("Websocket_ping_data_sent_setPingInterval", "[setPingInterval]")
 
         webSocketClient.stop();
 
-        // without this sleep test fails on Windows
-        ix::msleep(100);
-
         // Here we test ping interval
         // client has sent data, but ping should have been sent no matter what
         // -> expected ping messages == 3 as 900+900+1300 = 3100 seconds, 1 ping sent every second
@@ -361,3 +279,203 @@ TEST_CASE("Websocket_ping_data_sent_setPingInterval", "[setPingInterval]")
         ix::reportWebSocketTraffic();
     }
 }
+
+TEST_CASE("Websocket_ping_data_sent_setPingInterval_half_full", "[setPingInterval]")
+{
+    SECTION("Make sure that ping messages are sent, even if other messages are sent continuously during a given time")
+    {
+        ix::setupWebSocketTrafficTrackerCallback();
+
+        int port = getFreePort();
+        ix::WebSocketServer server(port);
+        std::atomic<int> serverReceivedPingMessages(0);
+        REQUIRE(startServer(server, serverReceivedPingMessages));
+
+        std::string session = ix::generateSessionId();
+        bool useSetHeartBeatPeriodMethod = false; // so use setPingInterval
+        WebSocketClient webSocketClient(port, useSetHeartBeatPeriodMethod);
+
+        webSocketClient.start();
+
+        // Wait for all chat instance to be ready
+        while (true)
+        {
+            if (webSocketClient.isReady()) break;
+            ix::msleep(10);
+        }
+
+        REQUIRE(server.getClients().size() == 1);
+
+        // send continuously for 1100ms
+        auto now = std::chrono::steady_clock::now();
+
+        while(std::chrono::steady_clock::now() - now <= std::chrono::milliseconds(900))
+        {
+            webSocketClient.sendMessage("message");
+            ix::msleep(1);
+        }
+        ix::msleep(150);
+
+        // Here we test ping interval
+        // client has sent data, but ping should have been sent no matter what
+        // -> expected ping messages == 1, as 900+150 = 1050ms, 1 ping sent every second
+        REQUIRE(serverReceivedPingMessages == 1);
+
+        ix::msleep(100);
+
+        webSocketClient.stop();
+
+        // Give us 500ms for the server to notice that clients went away
+        ix::msleep(500);
+        REQUIRE(server.getClients().size() == 0);
+
+        ix::reportWebSocketTraffic();
+    }
+}
+
+TEST_CASE("Websocket_ping_data_sent_setPingInterval_full", "[setPingInterval]")
+{
+    SECTION("Make sure that ping messages are sent, even if other messages are sent continuously for longer than ping interval")
+    {
+        ix::setupWebSocketTrafficTrackerCallback();
+
+        int port = getFreePort();
+        ix::WebSocketServer server(port);
+        std::atomic<int> serverReceivedPingMessages(0);
+        REQUIRE(startServer(server, serverReceivedPingMessages));
+
+        std::string session = ix::generateSessionId();
+        bool useSetHeartBeatPeriodMethod = false; // so use setPingInterval
+        WebSocketClient webSocketClient(port, useSetHeartBeatPeriodMethod);
+
+        webSocketClient.start();
+
+        // Wait for all chat instance to be ready
+        while (true)
+        {
+            if (webSocketClient.isReady()) break;
+            ix::msleep(1);
+        }
+
+        REQUIRE(server.getClients().size() == 1);
+
+        // send continuously for 1100ms
+        auto now = std::chrono::steady_clock::now();
+
+        while(std::chrono::steady_clock::now() - now <= std::chrono::milliseconds(1100))
+        {
+            webSocketClient.sendMessage("message");
+            ix::msleep(1);
+        }
+
+        // Here we test ping interval
+        // client has sent data, but ping should have been sent no matter what
+        // -> expected ping messages == 1, 1 ping sent every second
+        REQUIRE(serverReceivedPingMessages == 1);
+
+        ix::msleep(100);
+
+        webSocketClient.stop();
+
+        // Give us 500ms for the server to notice that clients went away
+        ix::msleep(500);
+        REQUIRE(server.getClients().size() == 0);
+
+        ix::reportWebSocketTraffic();
+    }
+}
+
+// Using setHeartBeatPeriod
+
+TEST_CASE("Websocket_ping_no_data_sent_setHeartBeatPeriod", "[setHeartBeatPeriod]")
+{
+    SECTION("Make sure that ping messages are sent when no other data are sent.")
+    {
+        ix::setupWebSocketTrafficTrackerCallback();
+
+        int port = getFreePort();
+        ix::WebSocketServer server(port);
+        std::atomic<int> serverReceivedPingMessages(0);
+        REQUIRE(startServer(server, serverReceivedPingMessages));
+
+        std::string session = ix::generateSessionId();
+        bool useSetHeartBeatPeriodMethod = true;
+        WebSocketClient webSocketClient(port, useSetHeartBeatPeriodMethod);
+
+        webSocketClient.start();
+
+        // Wait for all chat instance to be ready
+        while (true)
+        {
+            if (webSocketClient.isReady()) break;
+            ix::msleep(1);
+        }
+
+        REQUIRE(server.getClients().size() == 1);
+
+        ix::msleep(1900);
+
+        webSocketClient.stop();
+
+
+        // Here we test ping interval
+        // -> expected ping messages == 1 as 1900 seconds, 1 ping sent every second
+        REQUIRE(serverReceivedPingMessages == 1);
+
+        // Give us 500ms for the server to notice that clients went away
+        ix::msleep(500);
+        REQUIRE(server.getClients().size() == 0);
+
+        ix::reportWebSocketTraffic();
+    }
+}
+
+TEST_CASE("Websocket_ping_data_sent_setHeartBeatPeriod", "[setHeartBeatPeriod]")
+{
+    SECTION("Make sure that ping messages are sent, even if other messages are sent")
+    {
+        ix::setupWebSocketTrafficTrackerCallback();
+
+        int port = getFreePort();
+        ix::WebSocketServer server(port);
+        std::atomic<int> serverReceivedPingMessages(0);
+        REQUIRE(startServer(server, serverReceivedPingMessages));
+
+        std::string session = ix::generateSessionId();
+        bool useSetHeartBeatPeriodMethod = true;
+        WebSocketClient webSocketClient(port, useSetHeartBeatPeriodMethod);
+
+        webSocketClient.start();
+
+        // Wait for all chat instance to be ready
+        while (true)
+        {
+            if (webSocketClient.isReady()) break;
+            ix::msleep(1);
+        }
+
+        REQUIRE(server.getClients().size() == 1);
+
+        ix::msleep(900);
+        webSocketClient.sendMessage("hello world");
+        ix::msleep(900);
+        webSocketClient.sendMessage("hello world");
+        ix::msleep(1100);
+
+        webSocketClient.stop();
+
+        // without this sleep test fails on Windows
+        ix::msleep(100);
+
+        // Here we test ping interval
+        // client has sent data, but ping should have been sent no matter what
+        // -> expected ping messages == 2 as 900+900+1100 = 2900 seconds, 1 ping sent every second
+        REQUIRE(serverReceivedPingMessages == 2);
+
+        // Give us 500ms for the server to notice that clients went away
+        ix::msleep(500);
+        REQUIRE(server.getClients().size() == 0);
+
+        ix::reportWebSocketTraffic();
+    }
+}

test/IXWebSocketPingTimeoutTest.cpp

@@ -52,12 +52,12 @@ namespace
 
     bool WebSocketClient::isReady() const
     {
-        return _webSocket.getReadyState() == ix::WebSocket_ReadyState_Open;
+        return _webSocket.getReadyState() == ix::ReadyState::Open;
     }
 
     bool WebSocketClient::isClosed() const
     {
-        return _webSocket.getReadyState() == ix::WebSocket_ReadyState_Closed;
+        return _webSocket.getReadyState() == ix::ReadyState::Closed;
     }
 
     void WebSocketClient::stop()
@@ -78,6 +78,7 @@ namespace
         }
 
         _webSocket.setUrl(url);
+        _webSocket.disableAutomaticReconnection();
 
         // The important bit for this test.
         // Set a ping interval, and a ping timeout
@@ -96,13 +97,12 @@ namespace
                    const ix::WebSocketCloseInfo& closeInfo)
             {
                 std::stringstream ss;
-                if (messageType == ix::WebSocket_MessageType_Open)
+                if (messageType == ix::WebSocketMessageType::Open)
                 {
                     log("client connected");
 
-                    _webSocket.disableAutomaticReconnection();
                 }
-                else if (messageType == ix::WebSocket_MessageType_Close)
+                else if (messageType == ix::WebSocketMessageType::Close)
                 {
                     log("client disconnected");
 
@@ -111,29 +111,25 @@ namespace
                         _closedDueToPingTimeout = true;
                     }
 
-                    _webSocket.disableAutomaticReconnection();
-
                 }
-                else if (messageType == ix::WebSocket_MessageType_Error)
+                else if (messageType == ix::WebSocketMessageType::Error)
                 {
                     ss << "Error ! " << error.reason;
                     log(ss.str());
-
-                    _webSocket.disableAutomaticReconnection();
                 }
-                else if (messageType == ix::WebSocket_MessageType_Pong)
+                else if (messageType == ix::WebSocketMessageType::Pong)
                 {
                     _receivedPongMessages++;
 
                     ss << "Received pong message " << str;
                     log(ss.str());
                 }
-                else if (messageType == ix::WebSocket_MessageType_Ping)
+                else if (messageType == ix::WebSocketMessageType::Ping)
                 {
                     ss << "Received ping message " << str;
                     log(ss.str());
                 }
-                else if (messageType == ix::WebSocket_MessageType_Message)
+                else if (messageType == ix::WebSocketMessageType::Message)
                 {
                     ss << "Received message " << str;
                     log(ss.str());
@@ -178,7 +174,7 @@ namespace
                        const ix::WebSocketOpenInfo& openInfo,
                        const ix::WebSocketCloseInfo& closeInfo)
                     {
-                        if (messageType == ix::WebSocket_MessageType_Open)
+                        if (messageType == ix::WebSocketMessageType::Open)
                         {
                             Logger() << "New server connection";
                             Logger() << "id: " << connectionState->getId();
@@ -189,11 +185,11 @@ namespace
                                 Logger() << it.first << ": " << it.second;
                             }
                         }
-                        else if (messageType == ix::WebSocket_MessageType_Close)
+                        else if (messageType == ix::WebSocketMessageType::Close)
                         {
                             log("Server closed connection");
                         }
-                        else if (messageType == ix::WebSocket_MessageType_Ping)
+                        else if (messageType == ix::WebSocketMessageType::Ping)
                         {
                             log("Server received a ping");
                             receivedPingMessages++;
@@ -414,7 +410,7 @@ TEST_CASE("Websocket_ping_timeout", "[setPingTimeout]")
         REQUIRE(serverReceivedPingMessages == 1);
         REQUIRE(webSocketClient.getReceivedPongMessages() == 0);
 
-        ix::msleep(1000);
+        ix::msleep(1100);
 
         // Here we test ping timeout, timeout
         REQUIRE(serverReceivedPingMessages == 1);

test/IXWebSocketServerTest.cpp

@@ -50,7 +50,7 @@ namespace ix
                        const ix::WebSocketOpenInfo& openInfo,
                        const ix::WebSocketCloseInfo& closeInfo)
                     {
-                        if (messageType == ix::WebSocket_MessageType_Open)
+                        if (messageType == ix::WebSocketMessageType::Open)
                         {
                             Logger() << "New connection";
                             connectionState->computeId();
@@ -64,11 +64,11 @@ namespace ix
 
                             connectionId = connectionState->getId();
                         }
-                        else if (messageType == ix::WebSocket_MessageType_Close)
+                        else if (messageType == ix::WebSocketMessageType::Close)
                         {
                             Logger() << "Closed connection";
                         }
-                        else if (messageType == ix::WebSocket_MessageType_Message)
+                        else if (messageType == ix::WebSocketMessageType::Message)
                         {
                             for (auto&& client : server.getClients())
                             {

test/IXWebSocketTestConnectionDisconnection.cpp

@@ -60,30 +60,36 @@ namespace
                const ix::WebSocketCloseInfo& closeInfo)
             {
                 std::stringstream ss;
-                if (messageType == ix::WebSocket_MessageType_Open)
+                if (messageType == ix::WebSocketMessageType::Open)
                 {
                     log("cmd_websocket_satori_chat: connected !");
                 }
-                else if (messageType == ix::WebSocket_MessageType_Close)
+                else if (messageType == ix::WebSocketMessageType::Close)
                 {
                     log("cmd_websocket_satori_chat: disconnected !");
                 }
-                else if (messageType == ix::WebSocket_MessageType_Error)
+                else if (messageType == ix::WebSocketMessageType::Error)
                 {
-                    log("cmd_websocket_satori_chat: Error!");
+                    ss << "cmd_websocket_satori_chat: Error! ";
+                    ss << error.reason;
+                    log(ss.str());
                 }
-                else if (messageType == ix::WebSocket_MessageType_Message)
+                else if (messageType == ix::WebSocketMessageType::Message)
                 {
                     log("cmd_websocket_satori_chat: received message.!");
                 }
-                else if (messageType == ix::WebSocket_MessageType_Ping)
+                else if (messageType == ix::WebSocketMessageType::Ping)
                 {
                     log("cmd_websocket_satori_chat: received ping message.!");
                 }
-                else if (messageType == ix::WebSocket_MessageType_Pong)
+                else if (messageType == ix::WebSocketMessageType::Pong)
                 {
                     log("cmd_websocket_satori_chat: received pong message.!");
                 }
+                else if (messageType == ix::WebSocketMessageType::Fragment)
+                {
+                    log("cmd_websocket_satori_chat: received fragment.!");
+                }
                 else
                 {
                     log("Invalid ix::WebSocketMessageType");
@@ -103,26 +109,40 @@ TEST_CASE("websocket_connections", "[websocket]")
 {
     SECTION("Try to connect to invalid servers.")
     {
-        IXWebSocketTestConnectionDisconnection chatA;
+        IXWebSocketTestConnectionDisconnection test;
 
-        chatA.start(GOOGLE_URL);
+        test.start(GOOGLE_URL);
         ix::msleep(1000);
-        chatA.stop();
+        test.stop();
 
-        chatA.start(UNKNOWN_URL);
+        test.start(UNKNOWN_URL);
         ix::msleep(1000);
-        chatA.stop();
+        test.stop();
     }
 
-    SECTION("Try to connect and disconnect with different timing.")
+    SECTION("Try to connect and disconnect with different timing, not enough time to succesfully connect")
     {
-        IXWebSocketTestConnectionDisconnection chatA;
+        IXWebSocketTestConnectionDisconnection test;
         for (int i = 0; i < 50; ++i)
         {
             log(std::string("Run: ") + std::to_string(i));
-            chatA.start(WEBSOCKET_DOT_ORG_URL);
+            test.start(WEBSOCKET_DOT_ORG_URL);
             ix::msleep(i);
-            chatA.stop();
+            test.stop();
         }
     }
+
+    // This test breaks on travis CI - Ubuntu Xenial + gcc + tsan
+    // We should fix this.
+    /*SECTION("Try to connect and disconnect with different timing, from not enough time to successfull connect")
+    {
+        IXWebSocketTestConnectionDisconnection test;
+        for (int i = 0; i < 20; ++i)
+        {
+            log(std::string("Run: ") + std::to_string(i));
+            test.start(WEBSOCKET_DOT_ORG_URL);
+            ix::msleep(i*50);
+            test.stop();
+        }
+    }*/
 }

test/cmd_websocket_chat.cpp

@@ -87,7 +87,7 @@ namespace
 
     bool WebSocketChat::isReady() const
     {
-        return _webSocket.getReadyState() == ix::WebSocket_ReadyState_Open;
+        return _webSocket.getReadyState() == ix::ReadyState::Open;
     }
 
     void WebSocketChat::stop()
@@ -122,21 +122,21 @@ namespace
                    const ix::WebSocketCloseInfo& closeInfo)
             {
                 std::stringstream ss;
-                if (messageType == ix::WebSocket_MessageType_Open)
+                if (messageType == ix::WebSocketMessageType::Open)
                 {
                     ss << "cmd_websocket_chat: user "
                        << _user
                        << " Connected !";
                     log(ss.str());
                 }
-                else if (messageType == ix::WebSocket_MessageType_Close)
+                else if (messageType == ix::WebSocketMessageType::Close)
                 {
                     ss << "cmd_websocket_chat: user "
                        << _user
                        << " disconnected !";
                     log(ss.str());
                 }
-                else if (messageType == ix::WebSocket_MessageType_Message)
+                else if (messageType == ix::WebSocketMessageType::Message)
                 {
                     auto result = decodeMessage(str);
 
@@ -159,20 +159,20 @@ namespace
                        << _user << " > ";
                     log(ss.str());
                 }
-                else if (messageType == ix::WebSocket_MessageType_Error)
+                else if (messageType == ix::WebSocketMessageType::Error)
                 {
                     ss << "cmd_websocket_chat: Error ! " << error.reason;
                     log(ss.str());
                 }
-                else if (messageType == ix::WebSocket_MessageType_Ping)
+                else if (messageType == ix::WebSocketMessageType::Ping)
                 {
                     log("cmd_websocket_chat: received ping message");
                 }
-                else if (messageType == ix::WebSocket_MessageType_Pong)
+                else if (messageType == ix::WebSocketMessageType::Pong)
                 {
                     log("cmd_websocket_chat: received pong message");
                 }
-                else if (messageType == ix::WebSocket_MessageType_Fragment)
+                else if (messageType == ix::WebSocketMessageType::Fragment)
                 {
                     log("cmd_websocket_chat: received message fragment");
                 }
@@ -228,7 +228,7 @@ namespace
                        const ix::WebSocketOpenInfo& openInfo,
                        const ix::WebSocketCloseInfo& closeInfo)
                     {
-                        if (messageType == ix::WebSocket_MessageType_Open)
+                        if (messageType == ix::WebSocketMessageType::Open)
                         {
                             Logger() << "New connection";
                             Logger() << "id: " << connectionState->getId();
@@ -239,11 +239,11 @@ namespace
                                 Logger() << it.first << ": " << it.second;
                             }
                         }
-                        else if (messageType == ix::WebSocket_MessageType_Close)
+                        else if (messageType == ix::WebSocketMessageType::Close)
                         {
                             log("Closed connection");
                         }
-                        else if (messageType == ix::WebSocket_MessageType_Message)
+                        else if (messageType == ix::WebSocketMessageType::Message)
                         {
                             for (auto&& client : server.getClients())
                             {

test/run.py

@@ -28,9 +28,9 @@ try:
 except ImportError:
     hasClick = False
 
-
-DEFAULT_EXE = 'ixwebsocket_unittest'
-
+BUILD_TYPE = 'Debug'
+XML_OUTPUT_FILE = 'ixwebsocket_unittest.xml'
+TEST_EXE_PATH = None
 
 class Command(object):
     """Run system commands with timeout
@@ -65,7 +65,7 @@ class Command(object):
             return True, self.process.returncode
 
 
-def runCommand(cmd, assertOnFailure=True, timeout=None):
+def runCommand(cmd, abortOnFailure=True, timeout=None):
     '''Small wrapper to run a command and make sure it succeed'''
 
     if timeout is None:
@@ -73,16 +73,13 @@ def runCommand(cmd, assertOnFailure=True, timeout=None):
 
     print('\nRunning', cmd)
     command = Command(cmd)
-    timedout, ret = command.run(timeout)
+    succeed, ret = command.run(timeout)
 
-    if timedout:
-        print('Unittest timed out')
-
-    msg = 'cmd {} failed with error code {}'.format(cmd, ret)
-    if ret != 0:
+    if not succeed or ret != 0:
+        msg = 'cmd {}\nfailed with error code {}'.format(cmd, ret)
         print(msg)
-        if assertOnFailure:
-            assert False
+        if abortOnFailure:
+            sys.exit(-1)
 
 
 def runCMake(sanitizer, buildDir):
@@ -91,12 +88,6 @@ def runCMake(sanitizer, buildDir):
     (remove build sub-folder).
     '''
 
-    # CMake installed via Self Service ends up here.
-    cmake_executable = '/Applications/CMake.app/Contents/bin/cmake'
-
-    if not os.path.exists(cmake_executable):
-        cmake_executable = 'cmake'
-
     sanitizersFlags = {
         'asan': '-DSANITIZE_ADDRESS=On',
         'ubsan': '-DSANITIZE_UNDEFINED=On',
@@ -110,19 +101,22 @@ def runCMake(sanitizer, buildDir):
     if not os.path.exists(cmakeExecutable):
         cmakeExecutable = 'cmake'
 
-    generator = '"Unix Makefiles"'
     if platform.system() == 'Windows':
-        generator = '"NMake Makefiles"'
+        #generator = '"NMake Makefiles"'
+        generator = '"Visual Studio 16 2019"'
+    else:
+        generator = '"Unix Makefiles"'
 
-    fmt = '''
-{cmakeExecutable} -H. \
+    CMAKE_BUILD_TYPE = BUILD_TYPE
+
+    fmt = '{cmakeExecutable} -H. \
     {sanitizerFlag} \
-    -B{buildDir} \
-    -DCMAKE_BUILD_TYPE=Debug \
+    -B"{buildDir}" \
+    -DCMAKE_BUILD_TYPE={CMAKE_BUILD_TYPE} \
     -DUSE_TLS=1 \
     -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
-    -G{generator}
-'''
+    -G{generator}'
+
     cmakeCmd = fmt.format(**locals())
     runCommand(cmakeCmd)
 
@@ -133,10 +127,10 @@ def runTest(args, buildDir, xmlOutput, testRunName):
     if args is None:
         args = ''
 
-    fmt = '{buildDir}/{DEFAULT_EXE} -o {xmlOutput} -n "{testRunName}" -r junit "{args}"'
-    testCommand = fmt.format(**locals())
+    testCommand = '{} -o {} -n "{}" -r junit "{}"'.format(TEST_EXE_PATH, xmlOutput, testRunName, args)
+
     runCommand(testCommand,
-               assertOnFailure=False)
+               abortOnFailure=False)
 
 
 def validateTestSuite(xmlOutput):
@@ -296,8 +290,7 @@ def executeJobs(jobs):
 def computeAllTestNames(buildDir):
     '''Compute all test case names, by executing the unittest in a custom mode'''
 
-    executable = os.path.join(buildDir, DEFAULT_EXE)
-    cmd = '"{}" --list-test-names-only'.format(executable)
+    cmd = '"{}" --list-test-names-only'.format(TEST_EXE_PATH)
     names = os.popen(cmd).read().splitlines()
     names.sort()  # Sort test names for execution determinism
     return names
@@ -344,7 +337,7 @@ def generateXmlOutput(results, xmlOutput, testRunName, runTime):
         })
 
         systemOut = ET.Element('system-out')
-        systemOut.text = result['output'].decode('utf-8')
+        systemOut.text = result['output'].decode('utf-8', 'ignore')
         testCase.append(systemOut)
 
         if not result['success']:
@@ -365,16 +358,19 @@ def run(testName, buildDir, sanitizer, xmlOutput, testRunName, buildOnly, useLLD
     runCMake(sanitizer, buildDir)
 
     # build with make
-    makeCmd = 'make'
-    jobs = '-j8'
+    #makeCmd = 'cmake --build '
+    #jobs = '-j8'
 
-    if platform.system() == 'Windows':
-        makeCmd = 'nmake'
+    #if platform.system() == 'Windows':
+    #    makeCmd = 'nmake'
 
         # nmake does not have a -j option
-        jobs = ''
+    #    jobs = ''
 
-    runCommand('{} -C {} {}'.format(makeCmd, buildDir, jobs))
+    #runCommand('{} -C {} {}'.format(makeCmd, buildDir, jobs))
+
+    # build with cmake
+    runCommand('cmake --build ' + buildDir)
 
     if buildOnly:
         return
@@ -409,12 +405,7 @@ def run(testName, buildDir, sanitizer, xmlOutput, testRunName, buildOnly, useLLD
             continue
 
         # testName can contains spaces, so we enclose them in double quotes
-        executable = os.path.join(buildDir, DEFAULT_EXE)
-
-        if platform.system() == 'Windows':
-            executable += '.exe'
-
-        cmd = '{} "{}" "{}" > "{}" 2>&1'.format(lldb, executable, testName, outputPath)
+        cmd = '{} "{}" "{}" > "{}" 2>&1'.format(lldb, TEST_EXE_PATH, testName, outputPath)
 
         jobs.append({
             'name': testName,
@@ -454,8 +445,6 @@ def main():
     if not os.path.exists(buildDir):
         os.makedirs(buildDir)
 
-    defaultOutput = DEFAULT_EXE + '.xml'
-
     parser = argparse.ArgumentParser(description='Build and Run the engine unittest')
 
     sanitizers = ['tsan', 'asan', 'ubsan', 'none']
@@ -481,14 +470,29 @@ def main():
 
     # Default sanitizer is tsan
     sanitizer = args.sanitizer
-    if args.sanitizer is None:
+
+    if args.no_sanitizer:
+        sanitizer = 'none'
+    elif args.sanitizer is None:
         sanitizer = 'tsan'
 
+    # Sanitizers display lots of strange errors on Linux on CI,
+    # which looks like false positives
+    if platform.system() != 'Darwin':
+        sanitizer = 'none'
+
     defaultRunName = 'ixengine_{}_{}'.format(platform.system(), sanitizer)
 
-    xmlOutput = args.output or defaultOutput
+    xmlOutput = args.output or XML_OUTPUT_FILE
     testRunName = args.run_name or os.getenv('IXENGINE_TEST_RUN_NAME') or defaultRunName
 
+    global TEST_EXE_PATH
+
+    if platform.system() == 'Windows':
+        TEST_EXE_PATH = os.path.join(buildDir, BUILD_TYPE, 'ixwebsocket_unittest.exe')
+    else:
+        TEST_EXE_PATH = os.path.join(buildDir, 'ixwebsocket_unittest')
+
     if args.list:
         # catch2 exit with a different error code when requesting the list of files
         try:
@@ -505,11 +509,6 @@ def main():
         print('LLDB is only supported on Apple at this point')
         args.lldb = False
 
-    # Sanitizers display lots of strange errors on Linux on CI,
-    # which looks like false positives
-    if platform.system() != 'Darwin':
-        sanitizer = 'none'
-
     return run(args.test, buildDir, sanitizer, xmlOutput, 
                testRunName, args.build_only, args.lldb)
 

test/test_runner.cpp

@@ -7,12 +7,21 @@
 #define CATCH_CONFIG_RUNNER
 #include "catch.hpp"
 
+#include <spdlog/spdlog.h>
+
 #include <ixwebsocket/IXNetSystem.h>
+#include <ixcore/utils/IXCoreLogger.h>
 
 int main(int argc, char* argv[])
 {
     ix::initNetSystem();
 
+    ix::IXCoreLogger::LogFunc logFunc = [](const char* msg)
+    {
+        spdlog::info(msg);
+    };
+    ix::IXCoreLogger::setLogFunction(logFunc);
+
     int result = Catch::Session().run(argc, argv);
 
     ix::uninitNetSystem();

third_party/README.md

@@ -1 +1,3 @@
-Except ZLIB on Windows (whose port is currently broken...) all dependencies here are for the ws command line tools, not for the IXWebSockets library which is standalone.
+# Note
+
+Except *zlib* on Windows, all dependencies here are for the ws command line tools, not for the IXWebSockets library which is standalone.

third_party/msgpack11/msgpack11.cpp

@@ -119,62 +119,62 @@ static void verify_length(size_t len)
 }
 
 static void dump(NullStruct, std::string &out) {
-    out.push_back(0xc0);
+    out.push_back((char) 0xc0);
 }
 
 static void dump(float value, std::string &out) {
-    out.push_back(0xca);
+    out.push_back((char) 0xca);
     dump_data(value, out);
 }
 
 static void dump(double value, std::string &out) {
-    out.push_back(0xcb);
+    out.push_back((char) 0xcb);
     dump_data(value, out);
 }
 
 static void dump(int8_t value, std::string &out) {
     if( value < -32 )
     {
-        out.push_back(0xd0);
+        out.push_back((char) 0xd0);
     }
     out.push_back(value);
 }
 
 static void dump(int16_t value, std::string &out) {
-    out.push_back(0xd1);
+    out.push_back((char) 0xd1);
     dump_data(value, out);
 }
 
 static void dump(int32_t value, std::string &out) {
-    out.push_back(0xd2);
+    out.push_back((char) 0xd2);
     dump_data(value, out);
 }
 
 static void dump(int64_t value, std::string &out) {
-    out.push_back(0xd3);
+    out.push_back((char) 0xd3);
     dump_data(value, out);
 }
 
 static void dump(uint8_t value, std::string &out) {
     if(128 <= value)
     {
-        out.push_back(0xcc);
+        out.push_back((char) 0xcc);
     }
     out.push_back(value);
 }
 
 static void dump(uint16_t value, std::string &out) {
-    out.push_back(0xcd);
+    out.push_back((char) 0xcd);
     dump_data(value, out);
 }
 
 static void dump(uint32_t value, std::string &out) {
-    out.push_back(0xce);
+    out.push_back((char) 0xce);
     dump_data(value, out);
 }
 
 static void dump(uint64_t value, std::string &out) {
-    out.push_back(0xcf);
+    out.push_back((char) 0xcf);
     dump_data(value, out);
 }
 
@@ -194,19 +194,19 @@ static void dump(const std::string& value, std::string &out) {
     else if(len <= 0xff)
     {
         uint8_t const length = static_cast<uint8_t>(len);
-        out.push_back(0xd9);
+        out.push_back((char) 0xd9);
         out.push_back(length);
     }
     else if(len <= 0xffff)
     {
         uint16_t const length = static_cast<uint16_t>(len);
-        out.push_back(0xda);
+        out.push_back((char) 0xda);
         dump_data(length, out);
     }
     else
     {
         uint32_t const length = static_cast<uint32_t>(len);
-        out.push_back(0xdb);
+        out.push_back((char) 0xdb);
         dump_data(length, out);
     }
 
@@ -226,13 +226,13 @@ static void dump(const MsgPack::array& value, std::string &out) {
     else if(len <= 0xffff)
     {
         uint16_t const length = static_cast<uint16_t>(len);
-        out.push_back(0xdc);
+        out.push_back((char) 0xdc);
         dump_data(length, out);
     }
     else
     {
         uint32_t const length = static_cast<uint32_t>(len);
-        out.push_back(0xdd);
+        out.push_back((char) 0xdd);
         dump_data(length, out);
     }
 
@@ -252,13 +252,13 @@ static void dump(const MsgPack::object& value, std::string &out) {
     else if(len <= 0xffff)
     {
         uint16_t const length = static_cast<uint16_t>(len);
-        out.push_back(0xde);
+        out.push_back((char) 0xde);
         dump_data(length, out);
     }
     else
     {
         uint32_t const length = static_cast<uint32_t>(len);
-        out.push_back(0xdf);
+        out.push_back((char) 0xdf);
         dump_data(length, out);
     }
 
@@ -274,19 +274,19 @@ static void dump(const MsgPack::binary& value, std::string &out) {
     if(len <= 0xff)
     {
         uint8_t const length = static_cast<uint8_t>(len);
-        out.push_back(0xc4);
+        out.push_back((char) 0xc4);
         dump_data(length, out);
     }
     else if(len <= 0xffff)
     {
         uint16_t const length = static_cast<uint16_t>(len);
-        out.push_back(0xc5);
+        out.push_back((char) 0xc5);
         dump_data(length, out);
     }
     else
     {
         uint32_t const length = static_cast<uint32_t>(len);
-        out.push_back(0xc6);
+        out.push_back((char) 0xc6);
         dump_data(length, out);
     }
 
@@ -302,33 +302,33 @@ static void dump(const MsgPack::extension& value, std::string &out) {
     verify_length(len);
 
     if(len == 0x01) {
-        out.push_back(0xd4);
+        out.push_back((char) 0xd4);
     }
     else if(len == 0x02) {
-        out.push_back(0xd5);
+        out.push_back((char) 0xd5);
     }
     else if(len == 0x04) {
-        out.push_back(0xd6);
+        out.push_back((char) 0xd6);
     }
     else if(len == 0x08) {
-        out.push_back(0xd7);
+        out.push_back((char) 0xd7);
     }
     else if(len == 0x10) {
-        out.push_back(0xd8);
+        out.push_back((char) 0xd8);
     }
     else if(len <= 0xff) {
         uint8_t const length = static_cast<uint8_t>(len);
-        out.push_back(0xc7);
+        out.push_back((char) 0xc7);
         out.push_back(length);
     }
     else if(len <= 0xffff) {
         uint16_t const length = static_cast<uint16_t>(len);
-        out.push_back(0xc8);
+        out.push_back((char) 0xc8);
         dump_data(length, out);
     }
     else {
         uint32_t const length = static_cast<uint32_t>(len);
-        out.push_back(0xc9);
+        out.push_back((char) 0xc9);
         dump_data(length, out);
     }
 

third_party/spdlog/.clang-format

@@ -0,0 +1,108 @@
+---
+Language:        Cpp
+# BasedOnStyle:  LLVM
+AccessModifierOffset: -4
+AlignAfterOpenBracket: DontAlign
+AlignConsecutiveAssignments: false
+AlignConsecutiveDeclarations: false
+AlignEscapedNewlines: Right
+AlignOperands:   true
+AlignTrailingComments: true
+AllowAllParametersOfDeclarationOnNextLine: true
+AllowShortBlocksOnASingleLine: true
+AllowShortCaseLabelsOnASingleLine: false
+AllowShortFunctionsOnASingleLine: Empty
+AllowShortIfStatementsOnASingleLine: false
+AllowShortLoopsOnASingleLine: false
+AlwaysBreakAfterDefinitionReturnType: None
+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: true
+BinPackArguments: true
+BinPackParameters: true
+BraceWrapping:     
+  AfterClass:      true
+  AfterControlStatement: true
+  AfterEnum:       true
+  AfterFunction:   true
+  AfterNamespace:  false
+  AfterObjCDeclaration: true
+  AfterStruct:     true
+  AfterUnion:      true
+  BeforeCatch:     true
+  BeforeElse:      true
+  IndentBraces:    false
+  SplitEmptyFunction: true
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+BreakBeforeBinaryOperators: None
+BreakBeforeBraces: Custom
+BreakBeforeInheritanceComma: false
+BreakBeforeTernaryOperators: true
+BreakConstructorInitializersBeforeComma: true
+BreakConstructorInitializers: BeforeColon
+BreakAfterJavaFieldAnnotations: false
+BreakStringLiterals: true
+ColumnLimit:     140
+CommentPragmas:  '^ IWYU pragma:'
+CompactNamespaces:  false
+ConstructorInitializerAllOnOneLineOrOnePerLine: false
+ConstructorInitializerIndentWidth: 4
+ContinuationIndentWidth: 4
+Cpp11BracedListStyle: true
+DerivePointerAlignment: false
+DisableFormat:   false
+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: true
+ForEachMacros:   
+  - foreach
+  - Q_FOREACH
+  - BOOST_FOREACH
+IncludeCategories: 
+  - Regex:           '^"(llvm|llvm-c|clang|clang-c)/'
+    Priority:        2
+  - Regex:           '^(<|"(gtest|gmock|isl|json)/)'
+    Priority:        3
+  - Regex:           '.*'
+    Priority:        1
+IncludeIsMainRegex: '(Test)?$'
+IndentCaseLabels: false
+IndentWidth:     4
+IndentWrappedFunctionNames: false
+JavaScriptQuotes: Leave
+JavaScriptWrapImports: true
+KeepEmptyLinesAtTheStartOfBlocks: true
+MacroBlockBegin: ''
+MacroBlockEnd:   ''
+MaxEmptyLinesToKeep: 1
+NamespaceIndentation: None
+ObjCBlockIndentWidth: 2
+ObjCSpaceAfterProperty: false
+ObjCSpaceBeforeProtocolList: true
+PenaltyBreakAssignment: 2
+PenaltyBreakBeforeFirstCallParameter: 19
+PenaltyBreakComment: 300
+PenaltyBreakFirstLessLess: 120
+PenaltyBreakString: 1000
+PenaltyExcessCharacter: 1000000
+PenaltyReturnTypeOnItsOwnLine: 60
+PointerAlignment: Right
+ReflowComments:  true
+SortIncludes:    false
+SortUsingDeclarations: true
+SpaceAfterCStyleCast: false
+SpaceAfterTemplateKeyword: false
+SpaceBeforeAssignmentOperators: true
+SpaceBeforeParens: ControlStatements
+SpaceInEmptyParentheses: false
+SpacesBeforeTrailingComments: 1
+SpacesInAngles:  false
+SpacesInContainerLiterals: true
+SpacesInCStyleCastParentheses: false
+SpacesInParentheses: false
+SpacesInSquareBrackets: false
+Standard:        Cpp11
+TabWidth:        8
+UseTab:          Never
+...
+

third_party/spdlog/.clang-tidy

@@ -0,0 +1,28 @@
+Checks: 'modernize-*,modernize-use-override,google-*,-google-runtime-references,misc-*,clang-analyzer-*'
+WarningsAsErrors: ''
+HeaderFilterRegex: 'async.h|async_logger.h|common.h|details|formatter.h|logger.h|sinks|spdlog.h|tweakme.h|version.h'
+AnalyzeTemporaryDtors: false
+FormatStyle:     none
+
+CheckOptions:    
+  - key:             google-readability-braces-around-statements.ShortStatementLines
+    value:           '1'
+  - key:             google-readability-function-size.StatementThreshold
+    value:           '800'
+  - key:             google-readability-namespace-comments.ShortNamespaceLines
+    value:           '10'
+  - key:             google-readability-namespace-comments.SpacesBeforeComments
+    value:           '2'
+  - key:             modernize-loop-convert.MaxCopySize
+    value:           '16'
+  - key:             modernize-loop-convert.MinConfidence
+    value:           reasonable
+  - key:             modernize-loop-convert.NamingStyle
+    value:           CamelCase
+  - key:             modernize-pass-by-value.IncludeStyle
+    value:           llvm
+  - key:             modernize-replace-auto-ptr.IncludeStyle
+    value:           llvm
+  - key:             modernize-use-nullptr.NullMacros
+    value:           'NULL'
+

third_party/spdlog/.gitignore

@@ -0,0 +1,68 @@
+# Auto generated files
+build/*
+*.slo
+*.lo
+*.o
+*.obj
+*.suo
+*.tlog
+*.ilk
+*.log
+*.pdb
+*.idb
+*.iobj
+*.ipdb
+*.opensdf
+*.sdf
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+
+# Codelite
+.codelite
+
+# .orig files
+*.orig
+
+# example  files
+example/*
+!example/example.cpp
+!example/bench.cpp
+!example/utils.h
+!example/Makefile*
+!example/example.sln
+!example/example.vcxproj
+!example/CMakeLists.txt
+!example/multisink.cpp
+!example/jni
+
+# generated files
+generated
+
+# Cmake
+CMakeCache.txt
+CMakeFiles
+CMakeScripts
+Makefile
+cmake_install.cmake
+install_manifest.txt
+/tests/tests.VC.VC.opendb
+/tests/tests.VC.db
+/tests/tests
+/tests/logs/*
+
+# idea
+.idea/

third_party/spdlog/.travis.yml

@@ -0,0 +1,116 @@
+# Adapted from various sources, including:
+# - Louis Dionne's Hana: https://github.com/ldionne/hana
+# - Paul Fultz II's FIT: https://github.com/pfultz2/Fit
+# - Eric Niebler's range-v3: https://github.com/ericniebler/range-v3
+sudo: required
+language: cpp
+
+addons: &gcc48
+  apt:
+    packages:
+      - g++-4.8
+    sources:
+      - ubuntu-toolchain-r-test
+
+addons: &gcc7
+  apt:
+    packages:
+      - g++-7
+    sources:
+      - ubuntu-toolchain-r-test
+
+addons: &clang35
+  apt:
+    packages:
+      - clang-3.5
+    sources:
+      - ubuntu-toolchain-r-test
+      - llvm-toolchain-precise-3.5
+
+addons: &clang6
+  apt:
+    packages:
+      - clang-6.0
+    sources:
+      - ubuntu-toolchain-r-test
+      - llvm-toolchain-trusty-6.0
+
+
+matrix:
+  include:
+    # Test gcc-4.8: C++11, Build=Debug/Release
+    - env: GCC_VERSION=4.8 BUILD_TYPE=Debug CPP=11
+      os: linux
+      addons: *gcc48
+
+    - env: GCC_VERSION=4.8 BUILD_TYPE=Release CPP=11
+      os: linux
+      addons: *gcc48
+  
+    - env: GCC_VERSION=7 BUILD_TYPE=Release CPP=11
+      os: linux
+      addons: *gcc7
+
+    # Test clang-3.5: C++11, Build=Debug/Release
+    - env: CLANG_VERSION=3.5 BUILD_TYPE=Debug CPP=11
+      os: linux
+      addons: *clang35
+
+    - env: CLANG_VERSION=3.5 BUILD_TYPE=Release CPP=11
+      os: linux
+      addons: *clang35
+
+      # Test clang-6.0: C++11, Build=Debug, ASAN=On
+    - env: CLANG_VERSION=6.0 BUILD_TYPE=Debug CPP=11 ASAN=On TSAN=Off
+      os: linux
+      addons: *clang6
+      
+    - env: CLANG_VERSION=6.0 BUILD_TYPE=Release CPP=11 ASAN=On TSAN=Off
+      os: linux
+      addons: *clang6
+      
+      # Test clang-6.0: C++11, Build=Debug, TSAN=On
+    - env: CLANG_VERSION=6.0 BUILD_TYPE=Debug CPP=11 ASAN=Off TSAN=On
+      os: linux
+      addons: *clang6
+      
+    - env: CLANG_VERSION=6.0 BUILD_TYPE=Release CPP=11 ASAN=Off TSAN=On
+      os: linux
+      addons: *clang6
+
+      # osx
+    - env: BUILD_TYPE=Release CPP=11 ASAN=Off TSAN=Off
+      os: osx
+    
+
+
+
+before_script:
+  - if [ -n "$GCC_VERSION" ]; then export CXX="g++-${GCC_VERSION}" CC="gcc-${GCC_VERSION}"; fi
+  - if [ -n "$CLANG_VERSION" ]; then export CXX="clang++-${CLANG_VERSION}" CC="clang-${CLANG_VERSION}"; fi
+  - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then export CXX="clang++" CC="clang"; fi
+  - which $CXX
+  - which $CC
+  - $CXX --version
+  - cmake --version
+
+script:
+  - cd ${TRAVIS_BUILD_DIR}
+  - mkdir -p build && cd build
+  - |
+    cmake .. \
+      --warn-uninitialized \
+      -DCMAKE_BUILD_TYPE=$BUILD_TYPE \
+      -DCMAKE_CXX_STANDARD=$CPP \
+      -DSPDLOG_BUILD_EXAMPLES=ON \
+      -DSPDLOG_BUILD_BENCH=OFF \
+      -DSPDLOG_BUILD_TESTS=ON \
+      -DSPDLOG_SANITIZE_ADDRESS=$ASAN \
+      -DSPDLOG_SANITIZE_THREAD=$TSAN
+  - make VERBOSE=1 -j2
+  - ctest -j2 --output-on-failure
+
+
+
+notifications:
+  email: false

third_party/spdlog/CMakeLists.txt

@@ -0,0 +1,157 @@
+#
+# Copyright(c) 2015 Ruslan Baratov.
+# Distributed under the MIT License (http://opensource.org/licenses/MIT)
+#
+
+cmake_minimum_required(VERSION 3.1)
+project(spdlog VERSION 1.3.1 LANGUAGES CXX)
+include(CMakeDependentOption)
+include(GNUInstallDirs)
+
+#---------------------------------------------------------------------------------------
+# set default build to release
+#---------------------------------------------------------------------------------------
+if(NOT CMAKE_BUILD_TYPE)
+    set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose Release or Debug" FORCE)
+endif()
+
+message(STATUS "Build type: " ${CMAKE_BUILD_TYPE})
+
+#---------------------------------------------------------------------------------------
+# compiler config
+#---------------------------------------------------------------------------------------
+set(CMAKE_CXX_STANDARD 11)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS OFF)
+
+if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+    add_compile_options("-Wall")
+    add_compile_options("-Wextra")
+    add_compile_options("-Wconversion")
+    add_compile_options("-pedantic")
+    add_compile_options("-Wfatal-errors")
+    
+endif()
+
+#---------------------------------------------------------------------------------------
+# address sanitizers check
+#---------------------------------------------------------------------------------------
+include(cmake/sanitizers.cmake)
+
+#---------------------------------------------------------------------------------------
+# spdlog target
+#---------------------------------------------------------------------------------------
+add_library(spdlog INTERFACE)
+add_library(spdlog::spdlog ALIAS spdlog)
+
+# Check if spdlog is being used directly or via add_subdirectory
+set(SPDLOG_MASTER_PROJECT OFF)
+if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
+  set(SPDLOG_MASTER_PROJECT ON)
+endif()
+
+option(SPDLOG_BUILD_EXAMPLES "Build examples" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_BUILD_BENCH "Build benchmarks" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_BUILD_TESTS "Build tests" ${SPDLOG_MASTER_PROJECT})
+option(SPDLOG_FMT_EXTERNAL "Use external fmt library instead of bundled" OFF)
+
+if(SPDLOG_FMT_EXTERNAL)
+    find_package(fmt REQUIRED CONFIG)
+endif()
+
+target_include_directories(
+    spdlog
+    INTERFACE
+    "$<BUILD_INTERFACE:${CMAKE_CURRENT_LIST_DIR}/include>"
+    "$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>"
+)
+
+if(SPDLOG_FMT_EXTERNAL)
+    target_compile_definitions(spdlog INTERFACE SPDLOG_FMT_EXTERNAL)
+    target_link_libraries(spdlog INTERFACE fmt::fmt)
+endif()
+
+set(HEADER_BASE "${CMAKE_CURRENT_SOURCE_DIR}/include")
+
+if(SPDLOG_BUILD_EXAMPLES)
+    add_subdirectory(example)
+endif()
+
+if(SPDLOG_BUILD_TESTS)
+    include(CTest)
+    add_subdirectory(tests)
+endif()
+
+if(SPDLOG_BUILD_BENCH)
+    add_subdirectory(bench)
+endif()
+
+#---------------------------------------------------------------------------------------
+# Install/export targets and files
+#---------------------------------------------------------------------------------------
+# set files and directories
+set(config_install_dir "${CMAKE_INSTALL_LIBDIR}/cmake/${PROJECT_NAME}")
+set(include_install_dir "${CMAKE_INSTALL_INCLUDEDIR}")
+set(pkgconfig_install_dir "${CMAKE_INSTALL_LIBDIR}/pkgconfig")
+set(version_config "${CMAKE_BINARY_DIR}/${PROJECT_NAME}ConfigVersion.cmake")
+set(project_config "${CMAKE_CURRENT_BINARY_DIR}/${PROJECT_NAME}Config.cmake")
+set(targets_config "${PROJECT_NAME}Targets.cmake")
+set(pkg_config "${CMAKE_BINARY_DIR}/${PROJECT_NAME}.pc")
+set(targets_export_name "${PROJECT_NAME}Targets")
+set(namespace "${PROJECT_NAME}::")
+
+# generate package version file
+include(CMakePackageConfigHelpers)
+write_basic_package_version_file(
+    "${version_config}" COMPATIBILITY SameMajorVersion
+)
+
+# configure pkg config file
+configure_file("cmake/spdlog.pc.in" "${pkg_config}" @ONLY)
+# configure spdlogConfig.cmake file
+configure_file("cmake/Config.cmake.in" "${project_config}" @ONLY)
+
+# install targets
+install(
+    TARGETS spdlog
+    EXPORT "${targets_export_name}"
+)
+
+# install headers
+install(
+    DIRECTORY "${HEADER_BASE}/${PROJECT_NAME}"
+    DESTINATION "${include_install_dir}"
+)
+
+# install project config and version file
+install(
+    FILES "${project_config}" "${version_config}"
+    DESTINATION "${config_install_dir}"
+)
+
+# install pkg config file
+install(
+    FILES "${pkg_config}"
+    DESTINATION "${pkgconfig_install_dir}"
+)
+
+# install targets config file
+install(
+    EXPORT "${targets_export_name}"
+    NAMESPACE "${namespace}"
+    DESTINATION "${config_install_dir}"
+    FILE ${targets_config}
+)
+
+# export build directory targets file
+export(
+    EXPORT ${targets_export_name}
+    NAMESPACE "${namespace}"
+    FILE ${targets_config}
+)
+
+# register project in CMake user registry
+export(PACKAGE ${PROJECT_NAME})
+
+file(GLOB_RECURSE spdlog_include_SRCS "${HEADER_BASE}/*.h")
+add_custom_target(spdlog_headers_for_ide SOURCES ${spdlog_include_SRCS})

third_party/spdlog/INSTALL

@@ -0,0 +1,13 @@
+spdlog is header only library.
+Just copy the files to your build tree and use a C++11 compiler
+
+Tested on:
+gcc 4.8.1 and above
+clang 3.5
+Visual Studio 2013
+
+gcc 4.8 flags: --std==c++11 -pthread -O3 -flto -Wl,--no-as-needed
+gcc 4.9 flags: --std=c++11 -pthread -O3 -flto
+
+
+see the makefile in the example folder

third_party/spdlog/LICENSE

@@ -0,0 +1,22 @@
+The MIT License (MIT)
+
+Copyright (c) 2016 Gabi Melman.                                       
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
+

third_party/spdlog/README.md

@@ -0,0 +1,319 @@
+# spdlog
+
+Very fast, header only, C++ logging library. [![Build Status](https://travis-ci.org/gabime/spdlog.svg?branch=master)](https://travis-ci.org/gabime/spdlog)  [![Build status](https://ci.appveyor.com/api/projects/status/d2jnxclg20vd0o50?svg=true)](https://ci.appveyor.com/project/gabime/spdlog)
+
+
+
+## Install
+#### Just copy the headers:
+
+* Copy the source [folder](https://github.com/gabime/spdlog/tree/v1.x/include/spdlog) to your build tree and use a C++11 compiler.
+
+#### Or use your favorite package manager:
+
+* Ubuntu: `apt-get install libspdlog-dev`
+* Homebrew: `brew install spdlog`
+* FreeBSD:  `cd /usr/ports/devel/spdlog/ && make install clean`
+* Fedora: `yum install spdlog`
+* Gentoo: `emerge dev-libs/spdlog`
+* Arch Linux: `yaourt -S spdlog-git`
+* vcpkg: `vcpkg install spdlog`
+ 
+
+## Platforms
+ * Linux, FreeBSD, OpenBSD, Solaris, AIX
+ * Windows (msvc 2013+, cygwin)
+ * macOS (clang 3.5+)
+ * Android
+
+## Features
+* Very fast (see [benchmarks](#benchmarks) below).
+* Headers only, just copy and use.
+* Feature rich formatting, using the excellent [fmt](https://github.com/fmtlib/fmt) library.
+* Fast asynchronous mode (optional)
+* [Custom](https://github.com/gabime/spdlog/wiki/3.-Custom-formatting) formatting.
+* Multi/Single threaded loggers.
+* Various log targets:
+    * Rotating log files.
+    * Daily log files.
+    * Console logging (colors supported).
+    * syslog.
+    * Windows debugger (```OutputDebugString(..)```)
+    * Easily extendable with custom log targets  (just implement a single function in the [sink](include/spdlog/sinks/sink.h) interface).
+* Severity based filtering - threshold levels can be modified in runtime as well as in compile time.
+* Binary data logging.
+
+
+## Benchmarks
+
+Below are some [benchmarks](https://github.com/gabime/spdlog/blob/v1.x/bench/bench.cpp) done in Ubuntu 64 bit, Intel i7-4770 CPU @ 3.40GHz
+
+#### Synchronous mode
+```
+*******************************************************************************
+Single thread, 1,000,000 iterations
+*******************************************************************************
+basic_st...             Elapsed: 0.181652       5,505,042/sec
+rotating_st...          Elapsed: 0.181781       5,501,117/sec
+daily_st...             Elapsed: 0.187595       5,330,630/sec
+null_st...              Elapsed: 0.0504704      19,813,602/sec
+*******************************************************************************
+10 threads sharing same logger, 1,000,000 iterations
+*******************************************************************************
+basic_mt...             Elapsed: 0.616035       1,623,284/sec
+rotating_mt...          Elapsed: 0.620344       1,612,008/sec
+daily_mt...             Elapsed: 0.648353       1,542,369/sec
+null_mt...              Elapsed: 0.151972       6,580,166/sec
+``` 
+#### Asynchronous mode
+```
+*******************************************************************************
+10 threads sharing same logger, 1,000,000 iterations 
+*******************************************************************************
+async...                Elapsed: 0.350066       2,856,606/sec
+async...                Elapsed: 0.314865       3,175,960/sec
+async...                Elapsed: 0.349851       2,858,358/sec
+```
+
+## Usage samples
+
+#### Basic usage
+```c++
+#include "spdlog/spdlog.h"
+int main() 
+{
+    spdlog::info("Welcome to spdlog!");
+    spdlog::error("Some error message with arg: {}", 1);
+    
+    spdlog::warn("Easy padding in numbers like {:08d}", 12);
+    spdlog::critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
+    spdlog::info("Support for floats {:03.2f}", 1.23456);
+    spdlog::info("Positional args are {1} {0}..", "too", "supported");
+    spdlog::info("{:<30}", "left aligned");
+    
+    spdlog::set_level(spdlog::level::debug); // Set global log level to debug
+    spdlog::debug("This message should be displayed..");    
+    
+    // change log pattern
+    spdlog::set_pattern("[%H:%M:%S %z] [%n] [%^---%L---%$] [thread %t] %v");
+    
+    // Compile time log levels
+    // define SPDLOG_ACTIVE_LEVEL to desired level
+    SPDLOG_TRACE("Some trace message with param {}", {});
+    SPDLOG_DEBUG("Some debug message");
+        
+}
+```
+#### create stdout/stderr logger object
+```c++
+#include "spdlog/spdlog.h"
+#include "spdlog/sinks/stdout_color_sinks.h"
+void stdout_example()
+{
+    // create color multi threaded logger
+    auto console = spdlog::stdout_color_mt("console");    
+    auto err_logger = spdlog::stderr_color_mt("stderr");    
+    spdlog::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name)");
+}
+```
+---
+#### Basic file logger
+```c++
+#include "spdlog/sinks/basic_file_sink.h"
+void basic_logfile_example()
+{
+    try 
+    {
+        auto my_logger = spdlog::basic_logger_mt("basic_logger", "logs/basic-log.txt");
+    }
+    catch (const spdlog::spdlog_ex &ex)
+    {
+        std::cout << "Log init failed: " << ex.what() << std::endl;
+    }
+}
+```
+---
+#### Rotating files
+```c++
+#include "spdlog/sinks/rotating_file_sink.h"
+void rotating_example()
+{
+    // Create a file rotating logger with 5mb size max and 3 rotated files
+    auto rotating_logger = spdlog::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
+}
+```
+
+---
+#### Daily files
+```c++
+
+#include "spdlog/sinks/daily_file_sink.h"
+void daily_example()
+{
+    // Create a daily logger - a new file is created every day on 2:30am
+    auto daily_logger = spdlog::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
+}
+
+```
+
+---
+#### Cloning loggers 
+```c++
+// clone a logger and give it new name.
+// Useful for creating subsystem loggers from some "root" logger
+void clone_example()
+{
+    auto network_logger = spdlog::get("root")->clone("network");
+    network_logger->info("Logging network stuff..");
+}
+```
+
+---
+#### Periodic flush
+```c++
+// periodically flush all *registered* loggers every 3 seconds:
+// warning: only use if all your loggers are thread safe!
+spdlog::flush_every(std::chrono::seconds(3));
+
+```
+
+---
+#### Binary logging
+```c++
+// log binary data as hex.
+// many types of std::container<char> types can be used.
+// ranges are supported too.
+// format flags:
+// {:X} - print in uppercase.
+// {:s} - don't separate each byte with space.
+// {:p} - don't print the position on each line start.
+// {:n} - don't split the output to lines.
+
+#include "spdlog/fmt/bin_to_hex.h"
+
+void binary_example()
+{
+    auto console = spdlog::get("console");
+    std::array<char, 80> buf;
+    console->info("Binary example: {}", spdlog::to_hex(buf));
+    console->info("Another binary example:{:n}", spdlog::to_hex(std::begin(buf), std::begin(buf) + 10));
+    // more examples:
+    // logger->info("uppercase: {:X}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters: {:Xs}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters, no position info: {:Xsp}", spdlog::to_hex(buf));
+}
+
+```
+
+---
+#### Logger with multi sinks - each with different format and log level
+```c++
+
+// create logger with 2 targets with different log levels and formats.
+// the console will show only warnings or errors, while the file will log all.
+void multi_sink_example()
+{
+    auto console_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt>();
+    console_sink->set_level(spdlog::level::warn);
+    console_sink->set_pattern("[multi_sink_example] [%^%l%$] %v");
+
+    auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/multisink.txt", true);
+    file_sink->set_level(spdlog::level::trace);
+
+    spdlog::logger logger("multi_sink", {console_sink, file_sink});
+    logger.set_level(spdlog::level::debug);
+    logger.warn("this should appear in both console and file");
+    logger.info("this message should not appear in the console, only in the file");
+}
+```
+
+---
+#### Asynchronous logging
+```c++
+#include "spdlog/async.h"
+#include "spdlog/sinks/basic_file_sink.h"
+void async_example()
+{
+    // default thread pool settings can be modified *before* creating the async logger:
+    // spdlog::init_thread_pool(8192, 1); // queue with 8k items and 1 backing thread.
+    auto async_file = spdlog::basic_logger_mt<spdlog::async_factory>("async_file_logger", "logs/async_log.txt");
+    // alternatively:
+    // auto async_file = spdlog::create_async<spdlog::sinks::basic_file_sink_mt>("async_file_logger", "logs/async_log.txt");   
+}
+
+```
+
+---
+#### Asynchronous logger with multi sinks  
+```c++
+#include "spdlog/sinks/stdout_color_sinks.h"
+#include "spdlog/sinks/rotating_file_sink.h"
+
+void multi_sink_example2()
+{
+    spdlog::init_thread_pool(8192, 1);
+    auto stdout_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt >();
+    auto rotating_sink = std::make_shared<spdlog::sinks::rotating_file_sink_mt>("mylog.txt", 1024*1024*10, 3);
+    std::vector<spdlog::sink_ptr> sinks {stdout_sink, rotating_sink};
+    auto logger = std::make_shared<spdlog::async_logger>("loggername", sinks.begin(), sinks.end(), spdlog::thread_pool(), spdlog::async_overflow_policy::block);
+    spdlog::register_logger(logger);
+}
+```
+ 
+---
+#### User defined types
+```c++
+// user defined types logging by implementing operator<<
+#include "spdlog/fmt/ostr.h" // must be included
+struct my_type
+{
+    int i;
+    template<typename OStream>
+    friend OStream &operator<<(OStream &os, const my_type &c)
+    {
+        return os << "[my_type i=" << c.i << "]";
+    }
+};
+
+void user_defined_example()
+{
+    spdlog::get("console")->info("user defined type: {}", my_type{14});
+}
+
+```
+---
+#### Custom error handler
+```c++
+void err_handler_example()
+{
+    // can be set globally or per logger(logger->set_error_handler(..))
+    spdlog::set_error_handler([](const std::string &msg) { spdlog::get("console")->error("*** LOGGER ERROR ***: {}", msg); });
+    spdlog::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
+}
+
+```
+---
+#### syslog 
+```c++
+#include "spdlog/sinks/syslog_sink.h"
+void syslog_example()
+{
+    std::string ident = "spdlog-example";
+    auto syslog_logger = spdlog::syslog_logger_mt("syslog", ident, LOG_PID);
+    syslog_logger->warn("This is warning that will end up in syslog.");
+}
+```
+---
+#### Android example 
+```c++
+#include "spdlog/sinks/android_sink.h"
+void android_example()
+{
+    std::string tag = "spdlog-android";
+    auto android_logger = spdlog::android_logger("android", tag);
+    android_logger->critical("Use \"adb shell logcat\" to view this message.");
+}
+```
+
+## Documentation
+Documentation can be found in the [wiki](https://github.com/gabime/spdlog/wiki/1.-QuickStart) pages.

third_party/spdlog/appveyor.yml

@@ -0,0 +1,34 @@
+version: 1.0.{build}
+image: Visual Studio 2015
+environment:
+  matrix:
+  - GENERATOR: '"MinGW Makefiles"'
+    BUILD_TYPE: Debug
+  - GENERATOR: '"MinGW Makefiles"'
+    BUILD_TYPE: Release
+  - GENERATOR: '"Visual Studio 14 2015"'
+    BUILD_TYPE: Debug
+  - GENERATOR: '"Visual Studio 14 2015"'
+    BUILD_TYPE: Release
+  - GENERATOR: '"Visual Studio 14 2015 Win64"'
+    BUILD_TYPE: Debug
+  - GENERATOR: '"Visual Studio 14 2015 Win64"'
+    BUILD_TYPE: Release
+build_script:
+- cmd: >-
+    set
+
+    mkdir build
+
+    cd build
+
+    set PATH=%PATH:C:\Program Files\Git\usr\bin;=%
+
+    set PATH=C:\mingw-w64\i686-5.3.0-posix-dwarf-rt_v4-rev0\mingw32\bin;%PATH%
+
+    cmake .. -G %GENERATOR% -DCMAKE_BUILD_TYPE=%BUILD_TYPE% -DSPDLOG_BUILD_BENCH=OFF
+
+    cmake --build . --config %BUILD_TYPE%
+
+test_script:
+- ctest -VV -C "%BUILD_TYPE%"

third_party/spdlog/bench/CMakeLists.txt

@@ -0,0 +1,48 @@
+# *************************************************************************/
+# * Copyright (c) 2015 Ruslan Baratov.                                    */
+# *                                                                       */
+# * Permission is hereby granted, free of charge, to any person obtaining */
+# * a copy of this software and associated documentation files (the       */
+# * "Software"), to deal in the Software without restriction, including   */
+# * without limitation the rights to use, copy, modify, merge, publish,   */
+# * distribute, sublicense, and/or sell copies of the Software, and to    */
+# * permit persons to whom the Software is furnished to do so, subject to */
+# * the following conditions:                                             */
+# *                                                                       */
+# * The above copyright notice and this permission notice shall be        */
+# * included in all copies or substantial portions of the Software.       */
+# *                                                                       */
+# * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+# * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+# * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+# * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+# * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+# * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+# * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+# *************************************************************************/
+
+cmake_minimum_required(VERSION 3.1)
+project(SpdlogBench CXX)
+
+if(NOT TARGET spdlog)
+  # Stand-alone build
+  find_package(spdlog CONFIG REQUIRED)
+endif()
+
+find_package(Threads REQUIRED)
+find_package(benchmark CONFIG REQUIRED)
+
+add_executable(bench bench.cpp)
+target_link_libraries(bench PRIVATE spdlog::spdlog Threads::Threads)
+
+add_executable(async_bench async_bench.cpp)
+target_link_libraries(async_bench PRIVATE spdlog::spdlog Threads::Threads)
+
+add_executable(latency latency.cpp)
+target_link_libraries(latency PRIVATE benchmark::benchmark spdlog::spdlog Threads::Threads)
+
+
+add_executable(formatter-bench formatter-bench.cpp)
+target_link_libraries(formatter-bench PRIVATE benchmark::benchmark spdlog::spdlog Threads::Threads)
+
+file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/logs")

third_party/spdlog/bench/async_bench.cpp

@@ -0,0 +1,141 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+//
+// bench.cpp : spdlog benchmarks
+//
+#include "spdlog/spdlog.h"
+#include "spdlog/async.h"
+#include "spdlog/sinks/basic_file_sink.h"
+#include "spdlog/sinks/stdout_color_sinks.h"
+
+#include "utils.h"
+#include <atomic>
+#include <iostream>
+#include <memory>
+#include <string>
+#include <thread>
+
+using namespace std;
+using namespace std::chrono;
+using namespace spdlog;
+using namespace spdlog::sinks;
+using namespace utils;
+
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);
+
+int count_lines(const char *filename)
+{
+    int counter = 0;
+    auto *infile = fopen(filename, "r");
+    int ch;
+    while (EOF != (ch = getc(infile)))
+    {
+        if ('\n' == ch)
+            counter++;
+    }
+    fclose(infile);
+
+    return counter;
+}
+int main(int argc, char *argv[])
+{
+
+    int howmany = 1000000;
+    int queue_size = howmany + 2;
+    int threads = 10;
+    int iters = 3;
+
+    try
+    {
+        if (argc == 1)
+        {
+            spdlog::set_pattern("%v");
+            spdlog::info("Usage: {} <message_count> <threads> <q_size> <iterations>", argv[0]);
+            return 0;
+        }
+
+        if (argc > 1)
+            howmany = atoi(argv[1]);
+        if (argc > 2)
+            threads = atoi(argv[2]);
+        if (argc > 3)
+            queue_size = atoi(argv[3]);
+
+        if (argc > 4)
+            iters = atoi(argv[4]);
+
+        spdlog::info("-------------------------------------------------");
+        spdlog::info("Messages: {:14n}", howmany);
+        spdlog::info("Threads : {:14n}", threads);
+        spdlog::info("Queue   : {:14n}", queue_size);
+        spdlog::info("Iters   : {:>14n}", iters);
+        spdlog::info("-------------------------------------------------");
+
+        const char *filename = "logs/basic_async.log";
+
+        for (int i = 0; i < iters; i++)
+        {
+            auto tp = std::make_shared<details::thread_pool>(queue_size, 1);
+            auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>(filename, true);
+            auto logger = std::make_shared<async_logger>("async_logger", std::move(file_sink), std::move(tp), async_overflow_policy::block);
+            bench_mt(howmany, std::move(logger), threads);
+            auto count = count_lines(filename);
+
+            if (count != howmany)
+            {
+                spdlog::error("Test failed. {} has {:n} lines instead of {:n}", filename, count, howmany);
+                exit(1);
+            }
+            else
+            {
+                spdlog::info("Line count OK ({:n})\n", count);
+            }
+        }
+        spdlog::shutdown();
+    }
+    catch (std::exception &ex)
+    {
+        std::cerr << "Error: " << ex.what() << std::endl;
+        perror("Last error");
+        return 1;
+    }
+
+    return 0;
+}
+
+void thread_fun(std::shared_ptr<spdlog::logger> logger, int howmany)
+{
+    for (int i = 0; i < howmany; i++)
+    {
+        logger->info("Hello logger: msg number {}", i);
+    }
+}
+
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> logger, int thread_count)
+{
+    using std::chrono::high_resolution_clock;
+    vector<thread> threads;
+    auto start = high_resolution_clock::now();
+
+    int msgs_per_thread = howmany / thread_count;
+    int msgs_per_thread_mod = howmany % thread_count;
+    for (int t = 0; t < thread_count; ++t)
+    {
+        if (t == 0 && msgs_per_thread_mod)
+            threads.push_back(std::thread(thread_fun, logger, msgs_per_thread + msgs_per_thread_mod));
+        else
+            threads.push_back(std::thread(thread_fun, logger, msgs_per_thread));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    };
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::info("Elapsed: {} secs\t {:n}/sec", delta_d, int(howmany / delta_d));
+}

third_party/spdlog/bench/bench.cpp

@@ -0,0 +1,199 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+//
+// bench.cpp : spdlog benchmarks
+//
+#include "spdlog/spdlog.h"
+#include "spdlog/async.h"
+#include "spdlog/sinks/basic_file_sink.h"
+#include "spdlog/sinks/daily_file_sink.h"
+#include "spdlog/sinks/null_sink.h"
+#include "spdlog/sinks/rotating_file_sink.h"
+
+#include "utils.h"
+#include <atomic>
+#include <cstdlib> // EXIT_FAILURE
+#include <memory>
+#include <string>
+#include <thread>
+
+using namespace std;
+using namespace std::chrono;
+using namespace spdlog;
+using namespace spdlog::sinks;
+using namespace utils;
+
+void bench(int howmany, std::shared_ptr<spdlog::logger> log);
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count);
+void bench_default_api(int howmany, std::shared_ptr<spdlog::logger> log);
+void bench_c_string(int howmany, std::shared_ptr<spdlog::logger> log);
+
+int main(int argc, char *argv[])
+{
+
+    spdlog::default_logger()->set_pattern("[%^%l%$] %v");
+    int howmany = 1000000;
+    int queue_size = howmany + 2;
+    int threads = 10;
+    size_t file_size = 30 * 1024 * 1024;
+    size_t rotating_files = 5;
+
+    try
+    {
+
+        if (argc > 1)
+            howmany = atoi(argv[1]);
+        if (argc > 2)
+            threads = atoi(argv[2]);
+        if (argc > 3)
+            queue_size = atoi(argv[3]);
+
+        spdlog::info("**************************************************************");
+        spdlog::info("Single thread, {:n} iterations", howmany);
+        spdlog::info("**************************************************************");
+
+        auto basic_st = spdlog::basic_logger_st("basic_st", "logs/basic_st.log", true);
+        bench(howmany, std::move(basic_st));
+
+        basic_st.reset();
+        auto rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_st.log", file_size, rotating_files);
+        bench(howmany, std::move(rotating_st));
+
+        auto daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_st.log");
+        bench(howmany, std::move(daily_st));
+
+        bench(howmany, spdlog::create<null_sink_st>("null_st"));
+
+        spdlog::info("**************************************************************");
+        spdlog::info("C-string (400 bytes). Single thread, {:n} iterations", howmany);
+        spdlog::info("**************************************************************");
+
+        basic_st = spdlog::basic_logger_st("basic_st", "logs/basic_cs.log", true);
+        bench_c_string(howmany, std::move(basic_st));
+
+        rotating_st = spdlog::rotating_logger_st("rotating_st", "logs/rotating_cs.log", file_size, rotating_files);
+        bench_c_string(howmany, std::move(rotating_st));
+
+        daily_st = spdlog::daily_logger_st("daily_st", "logs/daily_cs.log");
+        bench_c_string(howmany, std::move(daily_st));
+
+        bench_c_string(howmany, spdlog::create<null_sink_st>("null_st"));
+
+        spdlog::info("**************************************************************");
+        spdlog::info("{:n} threads sharing same logger, {:n} iterations", threads, howmany);
+        spdlog::info("**************************************************************");
+
+        auto basic_mt = spdlog::basic_logger_mt("basic_mt", "logs/basic_mt.log", true);
+        bench_mt(howmany, std::move(basic_mt), threads);
+
+        auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "logs/rotating_mt.log", file_size, rotating_files);
+        bench_mt(howmany, std::move(rotating_mt), threads);
+
+        auto daily_mt = spdlog::daily_logger_mt("daily_mt", "logs/daily_mt.log");
+        bench_mt(howmany, std::move(daily_mt), threads);
+        bench_mt(howmany, spdlog::create<null_sink_mt>("null_mt"), threads);
+
+        spdlog::info("**************************************************************");
+        spdlog::info("Asyncronous.. {:n} threads sharing same logger, {:n} iterations", threads, howmany);
+        spdlog::info("**************************************************************");
+
+        for (int i = 0; i < 3; ++i)
+        {
+            spdlog::init_thread_pool(static_cast<size_t>(queue_size), 1);
+            auto as = spdlog::basic_logger_mt<spdlog::async_factory>("async", "logs/basic_async.log", true);
+            bench_mt(howmany, std::move(as), threads);
+        }
+    }
+    catch (std::exception &ex)
+    {
+        spdlog::error(ex.what());
+        return EXIT_FAILURE;
+    }
+    return EXIT_SUCCESS;
+}
+
+void bench(int howmany, std::shared_ptr<spdlog::logger> log)
+{
+    using std::chrono::high_resolution_clock;
+    auto start = high_resolution_clock::now();
+    for (auto i = 0; i < howmany; ++i)
+    {
+        log->info("Hello logger: msg number {}", i);
+    }
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+
+    spdlog::info("{:<16} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+    spdlog::drop(log->name());
+}
+
+void bench_mt(int howmany, std::shared_ptr<spdlog::logger> log, int thread_count)
+{
+    using std::chrono::high_resolution_clock;
+    vector<thread> threads;
+    auto start = high_resolution_clock::now();
+    for (int t = 0; t < thread_count; ++t)
+    {
+        threads.push_back(std::thread([&]() {
+            for (int j = 0; j < howmany / thread_count; j++)
+            {
+                log->info("Hello logger: msg number {}", j);
+            }
+        }));
+    }
+
+    for (auto &t : threads)
+    {
+        t.join();
+    };
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::info("{:<16} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+    spdlog::drop(log->name());
+}
+
+void bench_default_api(int howmany, std::shared_ptr<spdlog::logger> log)
+{
+    using std::chrono::high_resolution_clock;
+    auto orig_default = spdlog::default_logger();
+    spdlog::set_default_logger(log);
+    auto start = high_resolution_clock::now();
+    for (auto i = 0; i < howmany; ++i)
+    {
+        spdlog::info("Hello logger: msg number {}", i);
+    }
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::drop(log->name());
+    spdlog::set_default_logger(std::move(orig_default));
+    spdlog::info("{:<16} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+}
+
+void bench_c_string(int howmany, std::shared_ptr<spdlog::logger> log)
+{
+    const char *msg = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum pharetra metus cursus "
+                      "lacus placerat congue. Nulla egestas, mauris a tincidunt tempus, enim lectus volutpat mi, eu consequat sem "
+                      "libero nec massa. In dapibus ipsum a diam rhoncus gravida. Etiam non dapibus eros. Donec fringilla dui sed "
+                      "augue pretium, nec scelerisque est maximus. Nullam convallis, sem nec blandit maximus, nisi turpis ornare "
+                      "nisl, sit amet volutpat neque massa eu odio. Maecenas malesuada quam ex, posuere congue nibh turpis duis.";
+    using std::chrono::high_resolution_clock;
+    auto orig_default = spdlog::default_logger();
+    spdlog::set_default_logger(log);
+    auto start = high_resolution_clock::now();
+    for (auto i = 0; i < howmany; ++i)
+    {
+        spdlog::log(level::info, msg);
+    }
+
+    auto delta = high_resolution_clock::now() - start;
+    auto delta_d = duration_cast<duration<double>>(delta).count();
+    spdlog::drop(log->name());
+    spdlog::set_default_logger(std::move(orig_default));
+    spdlog::info("{:<16} Elapsed: {:0.2f} secs {:>16n}/sec", log->name(), delta_d, int(howmany / delta_d));
+}

third_party/spdlog/bench/formatter-bench.cpp

@@ -0,0 +1,92 @@
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include "benchmark/benchmark.h"
+
+#include "spdlog/spdlog.h"
+#include "spdlog/details/pattern_formatter.h"
+
+void bench_scoped_pad(benchmark::State &state, size_t wrapped_size, spdlog::details::padding_info padinfo)
+{
+    fmt::memory_buffer dest;
+    for (auto _ : state)
+    {
+        {
+            spdlog::details::scoped_pad p(wrapped_size, padinfo, dest);
+            benchmark::DoNotOptimize(p);
+            dest.clear();
+        }
+    }
+}
+
+void bench_formatter(benchmark::State &state, std::string pattern)
+{
+    auto formatter = spdlog::details::make_unique<spdlog::pattern_formatter>(pattern);
+    fmt::memory_buffer dest;
+    std::string logger_name = "logger-name";
+    const char *text = "Hello. This is some message with length of 80                                   ";
+
+    spdlog::details::log_msg msg(&logger_name, spdlog::level::info, text);
+
+    for (auto _ : state)
+    {
+        dest.clear();
+        formatter->format(msg, dest);
+        benchmark::DoNotOptimize(dest);
+    }
+}
+
+void bench_formatters()
+{
+    // basic patterns(single flag)
+    std::string all_flags = "+vtPnlLaAbBcCYDmdHIMSefFprRTXzEi%";
+    std::vector<std::string> basic_patterns;
+    for (auto &flag : all_flags)
+    {
+        auto pattern = std::string("%") + flag;
+        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern);
+
+        //        pattern = std::string("%16") + flag;
+        //        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern);
+        //
+        //        // bench center padding
+        //        pattern = std::string("%=16") + flag;
+        //        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern);
+    }
+
+    // complex patterns
+    std::vector<std::string> patterns = {
+        "[%D %X] [%l] [%n] %v",
+        "[%Y-%m-%d %H:%M:%S.%e] [%l] [%n] %v",
+        "[%Y-%m-%d %H:%M:%S.%e] [%l] [%n] [%t] %v",
+    };
+    for (auto &pattern : patterns)
+    {
+        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern)->Iterations(2500000);
+    }
+}
+
+int main(int argc, char *argv[])
+{
+
+    spdlog::set_pattern("[%^%l%$] %v");
+    if (argc != 2)
+    {
+        spdlog::error("Usage: {} <pattern> (or \"all\" to bench all)", argv[0]);
+        exit(1);
+    }
+
+    std::string pattern = argv[1];
+    if (pattern == "all")
+    {
+        bench_formatters();
+    }
+    else
+    {
+        benchmark::RegisterBenchmark(pattern.c_str(), bench_formatter, pattern);
+    }
+    benchmark::Initialize(&argc, argv);
+    benchmark::RunSpecifiedBenchmarks();
+}

third_party/spdlog/bench/latency.cpp

@@ -0,0 +1,143 @@
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+//
+// latency.cpp : spdlog latency benchmarks
+//
+
+#include "benchmark/benchmark.h"
+
+#include "spdlog/spdlog.h"
+#include "spdlog/async.h"
+#include "spdlog/sinks/basic_file_sink.h"
+#include "spdlog/sinks/daily_file_sink.h"
+#include "spdlog/sinks/null_sink.h"
+#include "spdlog/sinks/rotating_file_sink.h"
+
+void prepare_logdir()
+{
+    spdlog::info("Preparing latency_logs directory..");
+#ifdef _WIN32
+    system("if not exist logs mkdir latency_logs");
+    system("del /F /Q logs\\*");
+#else
+    auto rv = system("mkdir -p latency_logs");
+    if (rv != 0)
+    {
+        throw std::runtime_error("Failed to mkdir -p latency_logs");
+    }
+    rv = system("rm -f latency_logs/*");
+    if (rv != 0)
+    {
+        throw std::runtime_error("Failed to rm -f latency_logs/*");
+    }
+#endif
+}
+
+void bench_c_string(benchmark::State &state, std::shared_ptr<spdlog::logger> logger)
+{
+    const char *msg = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vestibulum pharetra metus cursus "
+                      "lacus placerat congue. Nulla egestas, mauris a tincidunt tempus, enim lectus volutpat mi, eu consequat sem "
+                      "libero nec massa. In dapibus ipsum a diam rhoncus gravida. Etiam non dapibus eros. Donec fringilla dui sed "
+                      "augue pretium, nec scelerisque est maximus. Nullam convallis, sem nec blandit maximus, nisi turpis ornare "
+                      "nisl, sit amet volutpat neque massa eu odio. Maecenas malesuada quam ex, posuere congue nibh turpis duis.";
+
+    for (auto _ : state)
+    {
+        logger->info(msg);
+    }
+}
+
+void bench_logger(benchmark::State &state, std::shared_ptr<spdlog::logger> logger)
+{
+    int i = 0;
+    for (auto _ : state)
+    {
+        logger->info("Hello logger: msg number {}...............", ++i);
+    }
+}
+
+void bench_disabled_macro(benchmark::State &state, std::shared_ptr<spdlog::logger> logger)
+{
+    int i = 0;
+    benchmark::DoNotOptimize(i);      // prevent unused warnings
+    benchmark::DoNotOptimize(logger); // prevent unused warnings
+    for (auto _ : state)
+    {
+        SPDLOG_LOGGER_DEBUG(logger, "Hello logger: msg number {}...............", i++);
+        SPDLOG_DEBUG("Hello logger: msg number {}...............", i++);
+    }
+}
+
+int main(int argc, char *argv[])
+{
+
+    using spdlog::sinks::basic_file_sink_mt;
+    using spdlog::sinks::basic_file_sink_st;
+    using spdlog::sinks::null_sink_mt;
+    using spdlog::sinks::null_sink_st;
+
+    size_t file_size = 30 * 1024 * 1024;
+    size_t rotating_files = 5;
+    int n_threads = benchmark::CPUInfo::Get().num_cpus;
+
+    prepare_logdir();
+
+    // disabled loggers
+    auto disabled_logger = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_mt>());
+    disabled_logger->set_level(spdlog::level::off);
+    benchmark::RegisterBenchmark("disabled-at-compile-time", bench_disabled_macro, disabled_logger);
+    benchmark::RegisterBenchmark("disabled-at-runtime", bench_logger, disabled_logger);
+
+    auto null_logger_st = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_st>());
+    benchmark::RegisterBenchmark("null_sink_st (500_bytes c_str)", bench_c_string, std::move(null_logger_st));
+    benchmark::RegisterBenchmark("null_sink_st", bench_logger, null_logger_st);
+
+    // basic_st
+    auto basic_st = spdlog::basic_logger_st("basic_st", "latency_logs/basic_st.log", true);
+    benchmark::RegisterBenchmark("basic_st", bench_logger, std::move(basic_st))->UseRealTime();
+    spdlog::drop("basic_st");
+
+    // rotating st
+    auto rotating_st = spdlog::rotating_logger_st("rotating_st", "latency_logs/rotating_st.log", file_size, rotating_files);
+    benchmark::RegisterBenchmark("rotating_st", bench_logger, std::move(rotating_st))->UseRealTime();
+    spdlog::drop("rotating_st");
+
+    // daily st
+    auto daily_st = spdlog::daily_logger_mt("daily_st", "latency_logs/daily_st.log");
+    benchmark::RegisterBenchmark("daily_st", bench_logger, std::move(daily_st))->UseRealTime();
+    spdlog::drop("daily_st");
+
+    //    //
+    //    // Multi threaded bench, 10 loggers using same logger concurrently
+    //    //
+    auto null_logger_mt = std::make_shared<spdlog::logger>("bench", std::make_shared<null_sink_mt>());
+    benchmark::RegisterBenchmark("null_sink_mt", bench_logger, null_logger_mt)->Threads(n_threads)->UseRealTime();
+
+    // basic_mt
+    auto basic_mt = spdlog::basic_logger_mt("basic_mt", "latency_logs/basic_mt.log", true);
+    benchmark::RegisterBenchmark("basic_mt", bench_logger, std::move(basic_mt))->Threads(n_threads)->UseRealTime();
+    spdlog::drop("basic_mt");
+
+    // rotating mt
+    auto rotating_mt = spdlog::rotating_logger_mt("rotating_mt", "latency_logs/rotating_mt.log", file_size, rotating_files);
+    benchmark::RegisterBenchmark("rotating_mt", bench_logger, std::move(rotating_mt))->Threads(n_threads)->UseRealTime();
+    spdlog::drop("rotating_mt");
+
+    // daily mt
+    auto daily_mt = spdlog::daily_logger_mt("daily_mt", "latency_logs/daily_mt.log");
+    benchmark::RegisterBenchmark("daily_mt", bench_logger, std::move(daily_mt))->Threads(n_threads)->UseRealTime();
+    spdlog::drop("daily_mt");
+
+    // async
+    auto queue_size = 1024 * 1024 * 3;
+    auto tp = std::make_shared<spdlog::details::thread_pool>(queue_size, 1);
+    auto async_logger = std::make_shared<spdlog::async_logger>(
+        "async_logger", std::make_shared<null_sink_mt>(), std::move(tp), spdlog::async_overflow_policy::overrun_oldest);
+    benchmark::RegisterBenchmark("async_logger", bench_logger, async_logger)->Threads(n_threads)->UseRealTime();
+
+    benchmark::Initialize(&argc, argv);
+    benchmark::RunSpecifiedBenchmarks();
+}

third_party/spdlog/bench/logs/.gitignore

@@ -0,0 +1,4 @@
+# Ignore everything in this directory
+*
+# Except this file
+!.gitignore

third_party/spdlog/bench/mem

@@ -0,0 +1,19 @@
+#!/bin/sh
+
+if [ $# -lt 1 ]; then
+  echo "usage: $0 <program>"
+fi
+
+PROG=$1
+
+if [ ! -x "$PROG" ]; then
+  echo $PROG not found or not executable.
+  exit 1
+fi
+
+$* &
+PID=$!
+
+while `kill -0 $PID 2>/dev/null`; do
+  ps -eo size,pid,user,pcpu,command --sort -size | awk '{ line=1 ; hr=$1/1024 ; printf("%13.2f Mb ",hr); } { for ( x=4 ; x<=NF ; x++ ) { printf("%s ",$x) } print "" }' | grep -v grep | grep -v $0 | grep $PROG
+done

third_party/spdlog/bench/utils.h

@@ -0,0 +1,34 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+#include <iomanip>
+#include <locale>
+#include <sstream>
+
+namespace utils {
+
+template<typename T>
+inline std::string format(const T &value)
+{
+    static std::locale loc("");
+    std::stringstream ss;
+    ss.imbue(loc);
+    ss << value;
+    return ss.str();
+}
+
+template<>
+inline std::string format(const double &value)
+{
+    static std::locale loc("");
+    std::stringstream ss;
+    ss.imbue(loc);
+    ss << std::fixed << std::setprecision(1) << value;
+    return ss.str();
+}
+
+} // namespace utils

third_party/spdlog/clang_tidy.sh

@@ -0,0 +1,2 @@
+#!/bin/bash
+clang-tidy example/example.cpp -- -I ./include 

third_party/spdlog/cmake/Config.cmake.in

@@ -0,0 +1,31 @@
+# *************************************************************************/
+# * Copyright (c) 2015 Ruslan Baratov.                                    */
+# *                                                                       */
+# * Permission is hereby granted, free of charge, to any person obtaining */
+# * a copy of this software and associated documentation files (the       */
+# * "Software"), to deal in the Software without restriction, including   */
+# * without limitation the rights to use, copy, modify, merge, publish,   */
+# * distribute, sublicense, and/or sell copies of the Software, and to    */
+# * permit persons to whom the Software is furnished to do so, subject to */
+# * the following conditions:                                             */
+# *                                                                       */
+# * The above copyright notice and this permission notice shall be        */
+# * included in all copies or substantial portions of the Software.       */
+# *                                                                       */
+# * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+# * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+# * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+# * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+# * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+# * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+# * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+# *************************************************************************/
+
+set(SPDLOG_FMT_EXTERNAL @SPDLOG_FMT_EXTERNAL@)
+
+include("${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake")
+
+if(SPDLOG_FMT_EXTERNAL)
+    include(CMakeFindDependencyMacro)
+    find_dependency(fmt CONFIG)
+endif()

third_party/spdlog/cmake/sanitizers.cmake

@@ -0,0 +1,21 @@
+if(SPDLOG_SANITIZE_THREAD AND SPDLOG_SANITIZE_ADDRESS)
+    message(FATAL_ERROR "AddressSanitizer is not compatible with ThreadSanitizer.")
+endif()
+
+if(SPDLOG_SANITIZE_ADDRESS)
+    message(STATUS "AddressSanitizer enabled")
+    set(SANITIZER_FLAGS "-fsanitize=address,undefined")
+    add_compile_options("-fno-sanitize=signed-integer-overflow")
+endif()
+
+if(SPDLOG_SANITIZE_THREAD)
+    message(STATUS "ThreadSanitizer enabled")
+    set(SANITIZER_FLAGS "-fsanitize=thread")
+endif()
+
+if(SPDLOG_SANITIZE_THREAD OR SPDLOG_SANITIZE_ADDRESS)
+    add_compile_options(${SANITIZER_FLAGS})
+    add_compile_options("-fno-sanitize-recover=all")
+    add_compile_options("-fno-omit-frame-pointer")
+    set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${SANITIZER_FLAGS} -fuse-ld=gold")
+endif()

third_party/spdlog/cmake/spdlog.pc.in

@@ -0,0 +1,6 @@
+prefix=@CMAKE_INSTALL_PREFIX@
+includedir=${prefix}/include
+
+Name: @PROJECT_NAME@
+Description: Super fast C++ logging library. 
+Version: @PROJECT_VERSION@

third_party/spdlog/example/CMakeLists.txt

@@ -0,0 +1,49 @@
+# *************************************************************************/
+# * Copyright (c) 2015 Ruslan Baratov.                                    */
+# *                                                                       */
+# * Permission is hereby granted, free of charge, to any person obtaining */
+# * a copy of this software and associated documentation files (the       */
+# * "Software"), to deal in the Software without restriction, including   */
+# * without limitation the rights to use, copy, modify, merge, publish,   */
+# * distribute, sublicense, and/or sell copies of the Software, and to    */
+# * permit persons to whom the Software is furnished to do so, subject to */
+# * the following conditions:                                             */
+# *                                                                       */
+# * The above copyright notice and this permission notice shall be        */
+# * included in all copies or substantial portions of the Software.       */
+# *                                                                       */
+# * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
+# * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
+# * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
+# * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
+# * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
+# * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
+# * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
+# *************************************************************************/
+
+cmake_minimum_required(VERSION 3.1)
+project(SpdlogExamples CXX)
+
+if(NOT TARGET spdlog)
+  # Stand-alone build
+  find_package(spdlog CONFIG REQUIRED)
+endif()
+
+find_package(Threads REQUIRED)
+
+add_executable(example example.cpp)
+if(CMAKE_SYSTEM_NAME STREQUAL "Android")
+    find_library(log-lib log)
+    target_link_libraries(example spdlog::spdlog Threads::Threads log)
+else()
+    target_link_libraries(example spdlog::spdlog Threads::Threads)
+endif()
+
+
+add_executable(multisink multisink.cpp)
+target_link_libraries(multisink spdlog::spdlog Threads::Threads)
+
+file(MAKE_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/logs")
+
+enable_testing()
+add_test(NAME example COMMAND example)

third_party/spdlog/example/Makefile-all-warn

@@ -0,0 +1,22 @@
+#-Weverything -Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-padded
+CXX	?= g++
+CXX_FLAGS = -Wall -Wextra -pedantic -std=c++11 -pthread -I../include -fmax-errors=1 -Wconversion -Weverything -Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-padded -Wno-weak-vtables -Wno-global-constructors
+CXX_RELEASE_FLAGS = -O3 -march=native
+CXX_DEBUG_FLAGS= -g
+
+all:	example 
+debug:	example-debug
+
+example: example.cpp
+	$(CXX) example.cpp -o example $(CXX_FLAGS) $(CXX_RELEASE_FLAGS) $(CXXFLAGS)
+
+
+example-debug: example.cpp
+	$(CXX) example.cpp -o example-debug $(CXX_FLAGS) $(CXX_DEBUG_FLAGS) $(CXXFLAGS)
+
+clean:
+	rm -f *.o logs/*.txt example example-debug
+
+
+rebuild: clean all
+rebuild-debug: clean debug

third_party/spdlog/example/Makefile.clang

@@ -0,0 +1,26 @@
+CXX	= clang++
+CXXFLAGS	= -march=native -Wall -Wextra -Wshadow -pedantic -std=c++11 -pthread -I../include
+CXX_RELEASE_FLAGS = -O2
+CXX_DEBUG_FLAGS= -g 
+
+
+all:	example 
+debug: example-debug 
+
+example: example.cpp
+	$(CXX) example.cpp -o example-clang $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
+
+	
+
+example-debug: example.cpp
+	$(CXX) example.cpp -o example-clang-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)
+
+
+clean:
+	rm -f *.o logs/*.txt example-clang example-clang-debug 
+
+
+rebuild: clean all
+rebuild-debug: clean debug
+
+

third_party/spdlog/example/Makefile.mingw

@@ -0,0 +1,25 @@
+CXX	?= g++
+CXXFLAGS	=  -D_WIN32_WINNT=0x600 -march=native -Wall -Wextra -pedantic -std=gnu++0x -pthread -Wl,--no-as-needed  -I../include 
+CXX_RELEASE_FLAGS = -O3 
+CXX_DEBUG_FLAGS= -g 
+
+
+all:	example 
+debug: example-debug 
+
+example: example.cpp
+	$(CXX) example.cpp -o example $(CXXFLAGS) $(CXX_RELEASE_FLAGS)
+
+	
+example-debug: example.cpp
+	$(CXX) example.cpp -o example-debug $(CXXFLAGS) $(CXX_DEBUG_FLAGS)
+
+
+clean:
+	rm -f *.o logs/*.txt example example-debug
+
+
+rebuild: clean all
+rebuild-debug: clean debug
+
+

third_party/spdlog/example/example.cpp

@@ -0,0 +1,235 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+//
+// spdlog usage example
+//
+//
+
+#include <cstdio>
+
+void stdout_logger_example();
+void basic_example();
+void rotating_example();
+void daily_example();
+void async_example();
+void binary_example();
+void trace_example();
+void multi_sink_example();
+void user_defined_example();
+void err_handler_example();
+void syslog_example();
+void clone_example();
+
+#include "spdlog/spdlog.h"
+
+int main(int, char *[])
+{
+    spdlog::info("Welcome to spdlog version {}.{}.{} !", SPDLOG_VER_MAJOR, SPDLOG_VER_MINOR, SPDLOG_VER_PATCH);
+    spdlog::warn("Easy padding in numbers like {:08d}", 12);
+    spdlog::critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
+    spdlog::info("Support for floats {:03.2f}", 1.23456);
+    spdlog::info("Positional args are {1} {0}..", "too", "supported");
+    spdlog::info("{:>8} aligned, {:<8} aligned", "right", "left");
+
+    // Runtime log levels
+    spdlog::set_level(spdlog::level::info); // Set global log level to info
+    spdlog::debug("This message should not be displayed!");
+    spdlog::set_level(spdlog::level::trace); // Set specific logger's log level
+    spdlog::debug("This message should be displayed..");
+
+    // Customize msg format for all loggers
+    spdlog::set_pattern("[%H:%M:%S %z] [%^%L%$] [thread %t] %v");
+    spdlog::info("This an info message with custom format");
+    spdlog::set_pattern("%+"); // back to default format
+
+    try
+    {
+        stdout_logger_example();
+        basic_example();
+        rotating_example();
+        daily_example();
+        clone_example();
+        async_example();
+        binary_example();
+        multi_sink_example();
+        user_defined_example();
+        err_handler_example();
+        trace_example();
+
+        // Flush all *registered* loggers using a worker thread every 3 seconds.
+        // note: registered loggers *must* be thread safe for this to work correctly!
+        spdlog::flush_every(std::chrono::seconds(3));
+
+        // Apply some function on all registered loggers
+        spdlog::apply_all([&](std::shared_ptr<spdlog::logger> l) { l->info("End of example."); });
+
+        // Release all spdlog resources, and drop all loggers in the registry.
+        // This is optional (only mandatory if using windows + async log).
+        spdlog::shutdown();
+    }
+
+    // Exceptions will only be thrown upon failed logger or sink construction (not during logging).
+    catch (const spdlog::spdlog_ex &ex)
+    {
+        std::printf("Log initialization failed: %s\n", ex.what());
+        return 1;
+    }
+}
+
+#include "spdlog/sinks/stdout_color_sinks.h"
+// or #include "spdlog/sinks/stdout_sinks.h" if no colors needed.
+void stdout_logger_example()
+{
+    // Create color multi threaded logger.
+    auto console = spdlog::stdout_color_mt("console");
+    // or for stderr:
+    // auto console = spdlog::stderr_color_mt("error-logger");
+}
+
+#include "spdlog/sinks/basic_file_sink.h"
+void basic_example()
+{
+    // Create basic file logger (not rotated).
+    auto my_logger = spdlog::basic_logger_mt("file_logger", "logs/basic-log.txt");
+}
+
+#include "spdlog/sinks/rotating_file_sink.h"
+void rotating_example()
+{
+    // Create a file rotating logger with 5mb size max and 3 rotated files.
+    auto rotating_logger = spdlog::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
+}
+
+#include "spdlog/sinks/daily_file_sink.h"
+void daily_example()
+{
+    // Create a daily logger - a new file is created every day on 2:30am.
+    auto daily_logger = spdlog::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
+}
+
+// Clone a logger and give it new name.
+// Useful for creating component/subsystem loggers from some "root" logger.
+void clone_example()
+{
+    auto network_logger = spdlog::default_logger()->clone("network");
+    network_logger->info("Logging network stuff..");
+}
+
+#include "spdlog/async.h"
+void async_example()
+{
+    // Default thread pool settings can be modified *before* creating the async logger:
+    // spdlog::init_thread_pool(32768, 1); // queue with max 32k items 1 backing thread.
+    auto async_file = spdlog::basic_logger_mt<spdlog::async_factory>("async_file_logger", "logs/async_log.txt");
+    // alternatively:
+    // auto async_file = spdlog::create_async<spdlog::sinks::basic_file_sink_mt>("async_file_logger", "logs/async_log.txt");
+
+    for (int i = 1; i < 101; ++i)
+    {
+        async_file->info("Async message #{}", i);
+    }
+}
+
+// Log binary data as hex.
+// Many types of std::container<char> types can be used.
+// Iterator ranges are supported too.
+// Format flags:
+// {:X} - print in uppercase.
+// {:s} - don't separate each byte with space.
+// {:p} - don't print the position on each line start.
+// {:n} - don't split the output to lines.
+
+#include "spdlog/fmt/bin_to_hex.h"
+void binary_example()
+{
+    std::vector<char> buf;
+    for (int i = 0; i < 80; i++)
+    {
+        buf.push_back(static_cast<char>(i & 0xff));
+    }
+    spdlog::info("Binary example: {}", spdlog::to_hex(buf));
+    spdlog::info("Another binary example:{:n}", spdlog::to_hex(std::begin(buf), std::begin(buf) + 10));
+    // more examples:
+    // logger->info("uppercase: {:X}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters: {:Xs}", spdlog::to_hex(buf));
+    // logger->info("uppercase, no delimiters, no position info: {:Xsp}", spdlog::to_hex(buf));
+}
+
+// Compile time log levels.
+// define SPDLOG_ACTIVE_LEVEL to required level (e.g. SPDLOG_LEVEL_TRACE)
+void trace_example()
+{
+    // trace from default logger
+    SPDLOG_TRACE("Some trace message.. {} ,{}", 1, 3.23);
+    // debug from default logger
+    SPDLOG_DEBUG("Some debug message.. {} ,{}", 1, 3.23);
+
+    // trace from logger object
+    auto logger = spdlog::get("file_logger");
+    SPDLOG_LOGGER_TRACE(logger, "another trace message");
+}
+
+// A logger with multiple sinks (stdout and file) - each with a different format and log level.
+void multi_sink_example()
+{
+    auto console_sink = std::make_shared<spdlog::sinks::stdout_color_sink_mt>();
+    console_sink->set_level(spdlog::level::warn);
+    console_sink->set_pattern("[multi_sink_example] [%^%l%$] %v");
+
+    auto file_sink = std::make_shared<spdlog::sinks::basic_file_sink_mt>("logs/multisink.txt", true);
+    file_sink->set_level(spdlog::level::trace);
+
+    spdlog::logger logger("multi_sink", {console_sink, file_sink});
+    logger.set_level(spdlog::level::debug);
+    logger.warn("this should appear in both console and file");
+    logger.info("this message should not appear in the console, only in the file");
+}
+
+// User defined types logging by implementing operator<<
+#include "spdlog/fmt/ostr.h" // must be included
+struct my_type
+{
+    int i;
+    template<typename OStream>
+    friend OStream &operator<<(OStream &os, const my_type &c)
+    {
+        return os << "[my_type i=" << c.i << "]";
+    }
+};
+
+void user_defined_example()
+{
+    spdlog::info("user defined type: {}", my_type{14});
+}
+
+// Custom error handler. Will be triggered on log failure.
+void err_handler_example()
+{
+    // can be set globally or per logger(logger->set_error_handler(..))
+    spdlog::set_error_handler([](const std::string &msg) { printf("*** Custom log error handler: %s ***\n", msg.c_str()); });
+}
+
+// syslog example (linux/osx/freebsd)
+#ifndef _WIN32
+#include "spdlog/sinks/syslog_sink.h"
+void syslog_example()
+{
+    std::string ident = "spdlog-example";
+    auto syslog_logger = spdlog::syslog_logger_mt("syslog", ident, LOG_PID);
+    syslog_logger->warn("This is warning that will end up in syslog.");
+}
+#endif
+
+// Android example.
+#if defined(__ANDROID__)
+#include "spdlog/sinks/android_sink.h"
+void android_example()
+{
+    std::string tag = "spdlog-android";
+    auto android_logger = spdlog::android_logger_mt("android", tag);
+    android_logger->critical("Use \"adb shell logcat\" to view this message.");
+}
+
+#endif

third_party/spdlog/example/example.sln

@@ -0,0 +1,106 @@
+
+Microsoft Visual Studio Solution File, Format Version 12.00
+# Visual Studio 15
+VisualStudioVersion = 15.0.27703.2018
+MinimumVisualStudioVersion = 10.0.40219.1
+Project("{8BC9CEB8-8B4A-11D0-8D11-00A0C91BC942}") = "example", "example.vcxproj", "{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}"
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "spdlog", "spdlog", "{7FC6AB76-AD88-4135-888C-0568E81475AF}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\async.h = ..\include\spdlog\async.h
+		..\include\spdlog\async_logger.h = ..\include\spdlog\async_logger.h
+		..\include\spdlog\common.h = ..\include\spdlog\common.h
+		..\include\spdlog\formatter.h = ..\include\spdlog\formatter.h
+		..\include\spdlog\logger.h = ..\include\spdlog\logger.h
+		..\include\spdlog\spdlog.h = ..\include\spdlog\spdlog.h
+		..\include\spdlog\tweakme.h = ..\include\spdlog\tweakme.h
+		..\include\spdlog\version.h = ..\include\spdlog\version.h
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "details", "details", "{08E93803-E650-42D9-BBB4-3C16979F850E}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\details\async_logger_impl.h = ..\include\spdlog\details\async_logger_impl.h
+		..\include\spdlog\details\circular_q.h = ..\include\spdlog\details\circular_q.h
+		..\include\spdlog\details\console_globals.h = ..\include\spdlog\details\console_globals.h
+		..\include\spdlog\details\file_helper.h = ..\include\spdlog\details\file_helper.h
+		..\include\spdlog\details\fmt_helper.h = ..\include\spdlog\details\fmt_helper.h
+		..\include\spdlog\details\log_msg.h = ..\include\spdlog\details\log_msg.h
+		..\include\spdlog\details\logger_impl.h = ..\include\spdlog\details\logger_impl.h
+		..\include\spdlog\details\mpmc_blocking_q.h = ..\include\spdlog\details\mpmc_blocking_q.h
+		..\include\spdlog\details\null_mutex.h = ..\include\spdlog\details\null_mutex.h
+		..\include\spdlog\details\os.h = ..\include\spdlog\details\os.h
+		..\include\spdlog\details\pattern_formatter.h = ..\include\spdlog\details\pattern_formatter.h
+		..\include\spdlog\details\periodic_worker.h = ..\include\spdlog\details\periodic_worker.h
+		..\include\spdlog\details\registry.h = ..\include\spdlog\details\registry.h
+		..\include\spdlog\details\spdlog_impl.h = ..\include\spdlog\details\spdlog_impl.h
+		..\include\spdlog\details\thread_pool.h = ..\include\spdlog\details\thread_pool.h
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "fmt", "fmt", "{82378DE1-8463-4F91-91A0-C2C40E2AEA2A}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\fmt\fmt.h = ..\include\spdlog\fmt\fmt.h
+		..\include\spdlog\fmt\ostr.h = ..\include\spdlog\fmt\ostr.h
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "bundled", "bundled", "{D9CA4494-80D1-48D1-A897-D3564F7B27FF}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\fmt\bundled\format.cc = ..\include\spdlog\fmt\bundled\format.cc
+		..\include\spdlog\fmt\bundled\format.h = ..\include\spdlog\fmt\bundled\format.h
+		..\include\spdlog\fmt\bundled\LICENSE.rst = ..\include\spdlog\fmt\bundled\LICENSE.rst
+		..\include\spdlog\fmt\bundled\ostream.cc = ..\include\spdlog\fmt\bundled\ostream.cc
+		..\include\spdlog\fmt\bundled\ostream.h = ..\include\spdlog\fmt\bundled\ostream.h
+		..\include\spdlog\fmt\bundled\posix.cc = ..\include\spdlog\fmt\bundled\posix.cc
+		..\include\spdlog\fmt\bundled\posix.h = ..\include\spdlog\fmt\bundled\posix.h
+		..\include\spdlog\fmt\bundled\printf.cc = ..\include\spdlog\fmt\bundled\printf.cc
+		..\include\spdlog\fmt\bundled\printf.h = ..\include\spdlog\fmt\bundled\printf.h
+		..\include\spdlog\fmt\bundled\time.h = ..\include\spdlog\fmt\bundled\time.h
+	EndProjectSection
+EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "sinks", "sinks", "{27D16BB9-2B81-4F61-80EC-0C7A777248E4}"
+	ProjectSection(SolutionItems) = preProject
+		..\include\spdlog\sinks\android_sink.h = ..\include\spdlog\sinks\android_sink.h
+		..\include\spdlog\sinks\ansicolor_sink.h = ..\include\spdlog\sinks\ansicolor_sink.h
+		..\include\spdlog\sinks\base_sink.h = ..\include\spdlog\sinks\base_sink.h
+		..\include\spdlog\sinks\dist_sink.h = ..\include\spdlog\sinks\dist_sink.h
+		..\include\spdlog\sinks\file_sinks.h = ..\include\spdlog\sinks\file_sinks.h
+		..\include\spdlog\sinks\msvc_sink.h = ..\include\spdlog\sinks\msvc_sink.h
+		..\include\spdlog\sinks\null_sink.h = ..\include\spdlog\sinks\null_sink.h
+		..\include\spdlog\sinks\ostream_sink.h = ..\include\spdlog\sinks\ostream_sink.h
+		..\include\spdlog\sinks\sink.h = ..\include\spdlog\sinks\sink.h
+		..\include\spdlog\sinks\stdout_color_sinks.h = ..\include\spdlog\sinks\stdout_color_sinks.h
+		..\include\spdlog\sinks\stdout_sinks.h = ..\include\spdlog\sinks\stdout_sinks.h
+		..\include\spdlog\sinks\syslog_sink.h = ..\include\spdlog\sinks\syslog_sink.h
+		..\include\spdlog\sinks\wincolor_sink.h = ..\include\spdlog\sinks\wincolor_sink.h
+		..\include\spdlog\sinks\windebug_sink.h = ..\include\spdlog\sinks\windebug_sink.h
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+EndProject
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+	GlobalSection(SolutionConfigurationPlatforms) = preSolution
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+		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Release|Win32.Build.0 = Release|Win32
+		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Release|x64.ActiveCfg = Release|x64
+		{9E5AB93A-0CCE-4BAC-9FCB-0FC9CB5EB8D2}.Release|x64.Build.0 = Release|x64
+	EndGlobalSection
+	GlobalSection(SolutionProperties) = preSolution
+		HideSolutionNode = FALSE
+	EndGlobalSection
+	GlobalSection(NestedProjects) = preSolution
+		{08E93803-E650-42D9-BBB4-3C16979F850E} = {7FC6AB76-AD88-4135-888C-0568E81475AF}
+		{82378DE1-8463-4F91-91A0-C2C40E2AEA2A} = {7FC6AB76-AD88-4135-888C-0568E81475AF}
+		{D9CA4494-80D1-48D1-A897-D3564F7B27FF} = {82378DE1-8463-4F91-91A0-C2C40E2AEA2A}
+		{27D16BB9-2B81-4F61-80EC-0C7A777248E4} = {7FC6AB76-AD88-4135-888C-0568E81475AF}
+	EndGlobalSection
+	GlobalSection(ExtensibilityGlobals) = postSolution
+		SolutionGuid = {1BF53532-C5DC-4236-B195-9E17CBE40A48}
+	EndGlobalSection
+EndGlobal

third_party/spdlog/example/example.vcxproj

@@ -0,0 +1,167 @@
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+    <ClCompile Include="example.cpp" />
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+    <LinkIncremental>false</LinkIncremental>
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+    <Link>
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+  <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
+  <ImportGroup Label="ExtensionTargets">
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+</Project>

third_party/spdlog/example/jni/Android.mk

@@ -0,0 +1,15 @@
+# Setup a project
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := example
+LOCAL_SRC_FILES := example.cpp
+LOCAL_CPPFLAGS += -Wall -Wshadow -Wextra -pedantic -std=c++11 -fPIE -pie
+LOCAL_LDFLAGS +=  -fPIE -pie
+
+# Add exception support and set path for spdlog's headers
+LOCAL_CPPFLAGS += -fexceptions -I../include
+# Use android's log library
+LOCAL_LDFLAGS += -llog
+
+include $(BUILD_EXECUTABLE)

third_party/spdlog/example/jni/Application.mk

@@ -0,0 +1,2 @@
+# Exceptions are used in spdlog. Link to an exception-ready C++ runtime.
+APP_STL = gnustl_static

third_party/spdlog/example/jni/example.cpp

@@ -0,0 +1,157 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+//
+// spdlog usage example
+//
+//
+
+#define SPDLOG_TRACE_ON
+#define SPDLOG_DEBUG_ON
+
+#include "spdlog/spdlog.h"
+
+#include <iostream>
+#include <memory>
+
+void async_example();
+void syslog_example();
+void android_example();
+void user_defined_example();
+void err_handler_example();
+
+namespace spd = spdlog;
+int main(int, char *[])
+{
+    try
+    {
+        // Console logger with color
+        auto console = spd::stdout_color_mt("console");
+        console->info("Welcome to spdlog!");
+        console->error("Some error message with arg{}..", 1);
+
+        // Formatting examples
+        console->warn("Easy padding in numbers like {:08d}", 12);
+        console->critical("Support for int: {0:d};  hex: {0:x};  oct: {0:o}; bin: {0:b}", 42);
+        console->info("Support for floats {:03.2f}", 1.23456);
+        console->info("Positional args are {1} {0}..", "too", "supported");
+        console->info("{:<30}", "left aligned");
+
+        spd::get("console")->info("loggers can be retrieved from a global registry using the spdlog::get(logger_name) function");
+
+        // Create basic file logger (not rotated)
+        auto my_logger = spd::basic_logger_mt("basic_logger", "logs/basic-log.txt");
+        my_logger->info("Some log message");
+
+        // Create a file rotating logger with 5mb size max and 3 rotated files
+        auto rotating_logger = spd::rotating_logger_mt("some_logger_name", "logs/rotating.txt", 1048576 * 5, 3);
+        for (int i = 0; i < 10; ++i)
+            rotating_logger->info("{} * {} equals {:>10}", i, i, i * i);
+
+        // Create a daily logger - a new file is created every day on 2:30am
+        auto daily_logger = spd::daily_logger_mt("daily_logger", "logs/daily.txt", 2, 30);
+        // trigger flush if the log severity is error or higher
+        daily_logger->flush_on(spd::level::err);
+        daily_logger->info(123.44);
+
+        // Customize msg format for all messages
+        spd::set_pattern("*** [%H:%M:%S %z] [thread %t] %v ***");
+        rotating_logger->info("This is another message with custom format");
+
+        // Runtime log levels
+        spd::set_level(spd::level::info); // Set global log level to info
+        console->debug("This message should not be displayed!");
+        console->set_level(spd::level::debug); // Set specific logger's log level
+        console->debug("This message should be displayed..");
+
+        // Compile time log levels
+        // define SPDLOG_DEBUG_ON or SPDLOG_TRACE_ON
+        SPDLOG_TRACE(console, "Enabled only #ifdef SPDLOG_TRACE_ON..{} ,{}", 1, 3.23);
+        SPDLOG_DEBUG(console, "Enabled only #ifdef SPDLOG_DEBUG_ON.. {} ,{}", 1, 3.23);
+
+        // Asynchronous logging is very fast..
+        // Just call spdlog::set_async_mode(q_size) and all created loggers from now on will be asynchronous..
+        async_example();
+
+        // syslog example. linux/osx only
+        syslog_example();
+
+        // android example. compile with NDK
+        android_example();
+
+        // Log user-defined types example
+        user_defined_example();
+
+        // Change default log error handler
+        err_handler_example();
+
+        // Apply a function on all registered loggers
+        spd::apply_all([&](std::shared_ptr<spdlog::logger> l) { l->info("End of example."); });
+
+        // Release and close all loggers
+        spdlog::drop_all();
+    }
+    // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
+    catch (const spd::spdlog_ex &ex)
+    {
+        std::cout << "Log init failed: " << ex.what() << std::endl;
+        return 1;
+    }
+}
+
+void async_example()
+{
+    size_t q_size = 4096; // queue size must be power of 2
+    spdlog::set_async_mode(q_size);
+    auto async_file = spd::daily_logger_st("async_file_logger", "logs/async_log.txt");
+    for (int i = 0; i < 100; ++i)
+        async_file->info("Async message #{}", i);
+}
+
+// syslog example (linux/osx/freebsd)
+void syslog_example()
+{
+#ifdef SPDLOG_ENABLE_SYSLOG
+    std::string ident = "spdlog-example";
+    auto syslog_logger = spd::syslog_logger("syslog", ident, LOG_PID);
+    syslog_logger->warn("This is warning that will end up in syslog.");
+#endif
+}
+
+// Android example
+void android_example()
+{
+#if defined(__ANDROID__)
+    std::string tag = "spdlog-android";
+    auto android_logger = spd::android_logger("android", tag);
+    android_logger->critical("Use \"adb shell logcat\" to view this message.");
+#endif
+}
+
+// user defined types logging by implementing operator<<
+struct my_type
+{
+    int i;
+    template<typename OStream>
+    friend OStream &operator<<(OStream &os, const my_type &c)
+    {
+        return os << "[my_type i=" << c.i << "]";
+    }
+};
+
+#include "spdlog/fmt/ostr.h" // must be included
+void user_defined_example()
+{
+    spd::get("console")->info("user defined type: {}", my_type{14});
+}
+
+//
+// custom error handler
+//
+void err_handler_example()
+{
+    // can be set globaly or per logger(logger->set_error_handler(..))
+    spdlog::set_error_handler([](const std::string &msg) { std::cerr << "my err handler: " << msg << std::endl; });
+    spd::get("console")->info("some invalid message to trigger an error {}{}{}{}", 3);
+}

third_party/spdlog/example/multisink.cpp

@@ -0,0 +1,47 @@
+#include "spdlog/spdlog.h"
+#include "spdlog/sinks/basic_file_sink.h"
+#include "spdlog/sinks/stdout_sinks.h"
+
+#include <iostream>
+#include <memory>
+
+int main(int, char *[])
+{
+    bool enable_debug = true;
+    try
+    {
+        // This other example use a single logger with multiple sinks.
+        // This means that the same log_msg is forwarded to multiple sinks;
+        // Each sink can have it's own log level and a message will be logged.
+        std::vector<spdlog::sink_ptr> sinks;
+        sinks.push_back(std::make_shared<spdlog::sinks::stdout_sink_mt>());
+        sinks.push_back(std::make_shared<spdlog::sinks::basic_file_sink_mt>("./log_regular_file.txt"));
+        sinks.push_back(std::make_shared<spdlog::sinks::basic_file_sink_mt>("./log_debug_file.txt"));
+
+        spdlog::logger console_multisink("multisink", sinks.begin(), sinks.end());
+        console_multisink.set_level(spdlog::level::warn);
+
+        sinks[0]->set_level(spdlog::level::trace); // console. Allow everything.  Default value
+        sinks[1]->set_level(spdlog::level::trace); //  regular file. Allow everything.  Default value
+        sinks[2]->set_level(spdlog::level::off);   //  regular file. Ignore everything.
+
+        console_multisink.warn("warn: will print only on console and regular file");
+
+        if (enable_debug)
+        {
+            console_multisink.set_level(spdlog::level::debug); // level of the logger
+            sinks[1]->set_level(spdlog::level::debug);         // regular file
+            sinks[2]->set_level(spdlog::level::debug);         // debug file
+        }
+        console_multisink.debug("Debug: you should see this on console and both files");
+
+        // Release and close all loggers
+        spdlog::drop_all();
+    }
+    // Exceptions will only be thrown upon failed logger or sink construction (not during logging)
+    catch (const spdlog::spdlog_ex &ex)
+    {
+        std::cout << "Log init failed: " << ex.what() << std::endl;
+        return 1;
+    }
+}

third_party/spdlog/example/utils.h

@@ -0,0 +1,34 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+#include <iomanip>
+#include <locale>
+#include <sstream>
+
+namespace utils {
+
+template<typename T>
+inline std::string format(const T &value)
+{
+    static std::locale loc("");
+    std::stringstream ss;
+    ss.imbue(loc);
+    ss << value;
+    return ss.str();
+}
+
+template<>
+inline std::string format(const double &value)
+{
+    static std::locale loc("");
+    std::stringstream ss;
+    ss.imbue(loc);
+    ss << std::fixed << std::setprecision(1) << value;
+    return ss.str();
+}
+
+} // namespace utils

third_party/spdlog/format.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+echo -n "Running dos2unix     "
+find . -name "*\.h" -o -name "*\.cpp"|grep -v bundled|xargs -I {} sh -c "dos2unix '{}' 2>/dev/null; echo -n '.'"
+echo
+echo -n "Running clang-format "
+find . -name "*\.h" -o -name "*\.cpp"|grep -v bundled|xargs -I {} sh -c "clang-format -i {}; echo -n '.'"
+echo
+
+

third_party/spdlog/include/spdlog/async.h

@@ -0,0 +1,87 @@
+
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+//
+// Async logging using global thread pool
+// All loggers created here share same global thread pool.
+// Each log message is pushed to a queue along withe a shared pointer to the
+// logger.
+// If a logger deleted while having pending messages in the queue, it's actual
+// destruction will defer
+// until all its messages are processed by the thread pool.
+// This is because each message in the queue holds a shared_ptr to the
+// originating logger.
+
+#include "spdlog/async_logger.h"
+#include "spdlog/details/registry.h"
+#include "spdlog/details/thread_pool.h"
+
+#include <memory>
+#include <mutex>
+
+namespace spdlog {
+
+namespace details {
+static const size_t default_async_q_size = 8192;
+}
+
+// async logger factory - creates async loggers backed with thread pool.
+// if a global thread pool doesn't already exist, create it with default queue
+// size of 8192 items and single thread.
+template<async_overflow_policy OverflowPolicy = async_overflow_policy::block>
+struct async_factory_impl
+{
+    template<typename Sink, typename... SinkArgs>
+    static std::shared_ptr<async_logger> create(std::string logger_name, SinkArgs &&... args)
+    {
+        auto &registry_inst = details::registry::instance();
+
+        // create global thread pool if not already exists..
+        std::lock_guard<std::recursive_mutex> tp_lock(registry_inst.tp_mutex());
+        auto tp = registry_inst.get_tp();
+        if (tp == nullptr)
+        {
+            tp = std::make_shared<details::thread_pool>(details::default_async_q_size, 1);
+            registry_inst.set_tp(tp);
+        }
+
+        auto sink = std::make_shared<Sink>(std::forward<SinkArgs>(args)...);
+        auto new_logger = std::make_shared<async_logger>(std::move(logger_name), std::move(sink), std::move(tp), OverflowPolicy);
+        registry_inst.initialize_logger(new_logger);
+        return new_logger;
+    }
+};
+
+using async_factory = async_factory_impl<async_overflow_policy::block>;
+using async_factory_nonblock = async_factory_impl<async_overflow_policy::overrun_oldest>;
+
+template<typename Sink, typename... SinkArgs>
+inline std::shared_ptr<spdlog::logger> create_async(std::string logger_name, SinkArgs &&... sink_args)
+{
+    return async_factory::create<Sink>(std::move(logger_name), std::forward<SinkArgs>(sink_args)...);
+}
+
+template<typename Sink, typename... SinkArgs>
+inline std::shared_ptr<spdlog::logger> create_async_nb(std::string logger_name, SinkArgs &&... sink_args)
+{
+    return async_factory_nonblock::create<Sink>(std::move(logger_name), std::forward<SinkArgs>(sink_args)...);
+}
+
+// set global thread pool.
+inline void init_thread_pool(size_t q_size, size_t thread_count)
+{
+    auto tp = std::make_shared<details::thread_pool>(q_size, thread_count);
+    details::registry::instance().set_tp(std::move(tp));
+}
+
+// get the global thread pool.
+inline std::shared_ptr<spdlog::details::thread_pool> thread_pool()
+{
+    return details::registry::instance().get_tp();
+}
+} // namespace spdlog

third_party/spdlog/include/spdlog/async_logger.h

@@ -0,0 +1,73 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+// Very fast asynchronous logger (millions of logs per second on an average
+// desktop)
+// Uses pre allocated lockfree queue for maximum throughput even under large
+// number of threads.
+// Creates a single back thread to pop messages from the queue and log them.
+//
+// Upon each log write the logger:
+//    1. Checks if its log level is enough to log the message
+//    2. Push a new copy of the message to a queue (or block the caller until
+//    space is available in the queue)
+//    3. will throw spdlog_ex upon log exceptions
+// Upon destruction, logs all remaining messages in the queue before
+// destructing..
+
+#include "spdlog/common.h"
+#include "spdlog/logger.h"
+
+#include <chrono>
+#include <memory>
+#include <string>
+
+namespace spdlog {
+
+// Async overflow policy - block by default.
+enum class async_overflow_policy
+{
+    block,         // Block until message can be enqueued
+    overrun_oldest // Discard oldest message in the queue if full when trying to
+                   // add new item.
+};
+
+namespace details {
+class thread_pool;
+}
+
+class async_logger final : public std::enable_shared_from_this<async_logger>, public logger
+{
+    friend class details::thread_pool;
+
+public:
+    template<typename It>
+    async_logger(std::string logger_name, It begin, It end, std::weak_ptr<details::thread_pool> tp,
+        async_overflow_policy overflow_policy = async_overflow_policy::block);
+
+    async_logger(std::string logger_name, sinks_init_list sinks_list, std::weak_ptr<details::thread_pool> tp,
+        async_overflow_policy overflow_policy = async_overflow_policy::block);
+
+    async_logger(std::string logger_name, sink_ptr single_sink, std::weak_ptr<details::thread_pool> tp,
+        async_overflow_policy overflow_policy = async_overflow_policy::block);
+
+    std::shared_ptr<logger> clone(std::string new_name) override;
+
+protected:
+    void sink_it_(details::log_msg &msg) override;
+    void flush_() override;
+
+    void backend_log_(const details::log_msg &incoming_log_msg);
+    void backend_flush_();
+
+private:
+    std::weak_ptr<details::thread_pool> thread_pool_;
+    async_overflow_policy overflow_policy_;
+};
+} // namespace spdlog
+
+#include "details/async_logger_impl.h"

third_party/spdlog/include/spdlog/common.h

@@ -0,0 +1,243 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+#include "spdlog/tweakme.h"
+
+#include <atomic>
+#include <chrono>
+#include <functional>
+#include <initializer_list>
+#include <memory>
+#include <stdexcept>
+#include <string>
+#include <cstring>
+#include <type_traits>
+#include <unordered_map>
+
+#if defined(SPDLOG_WCHAR_FILENAMES) || defined(SPDLOG_WCHAR_TO_UTF8_SUPPORT)
+#include <codecvt>
+#include <locale>
+#endif
+
+#include "spdlog/details/null_mutex.h"
+
+#include "spdlog/fmt/fmt.h"
+
+// visual studio upto 2013 does not support noexcept nor constexpr
+#if defined(_MSC_VER) && (_MSC_VER < 1900)
+#define SPDLOG_NOEXCEPT throw()
+#define SPDLOG_CONSTEXPR
+#else
+#define SPDLOG_NOEXCEPT noexcept
+#define SPDLOG_CONSTEXPR constexpr
+#endif
+
+#if defined(__GNUC__) || defined(__clang__)
+#define SPDLOG_DEPRECATED __attribute__((deprecated))
+#elif defined(_MSC_VER)
+#define SPDLOG_DEPRECATED __declspec(deprecated)
+#else
+#define SPDLOG_DEPRECATED
+#endif
+
+// disable thread local on msvc 2013
+#ifndef SPDLOG_NO_TLS
+#if (defined(_MSC_VER) && (_MSC_VER < 1900)) || defined(__cplusplus_winrt)
+#define SPDLOG_NO_TLS 1
+#endif
+#endif
+
+// Get the basename of __FILE__ (at compile time if possible)
+#if FMT_HAS_FEATURE(__builtin_strrchr)
+#define SPDLOG_STRRCHR(str, sep) __builtin_strrchr(str, sep)
+#else
+#define SPDLOG_STRRCHR(str, sep) strrchr(str, sep)
+#endif //__builtin_strrchr not defined
+
+#ifdef _WIN32
+#define SPDLOG_FILE_BASENAME(file) SPDLOG_STRRCHR("\\" file, '\\') + 1
+#else
+#define SPDLOG_FILE_BASENAME(file) SPDLOG_STRRCHR("/" file, '/') + 1
+#endif
+
+#ifndef SPDLOG_FUNCTION
+#define SPDLOG_FUNCTION __FUNCTION__
+#endif
+
+namespace spdlog {
+
+class formatter;
+
+namespace sinks {
+class sink;
+}
+
+using log_clock = std::chrono::system_clock;
+using sink_ptr = std::shared_ptr<sinks::sink>;
+using sinks_init_list = std::initializer_list<sink_ptr>;
+using log_err_handler = std::function<void(const std::string &err_msg)>;
+
+// string_view type - either std::string_view or fmt::string_view (pre c++17)
+#if defined(FMT_USE_STD_STRING_VIEW)
+using string_view_t = std::string_view;
+#else
+using string_view_t = fmt::string_view;
+#endif
+
+#if defined(SPDLOG_NO_ATOMIC_LEVELS)
+using level_t = details::null_atomic_int;
+#else
+using level_t = std::atomic<int>;
+#endif
+
+#define SPDLOG_LEVEL_TRACE 0
+#define SPDLOG_LEVEL_DEBUG 1
+#define SPDLOG_LEVEL_INFO 2
+#define SPDLOG_LEVEL_WARN 3
+#define SPDLOG_LEVEL_ERROR 4
+#define SPDLOG_LEVEL_CRITICAL 5
+#define SPDLOG_LEVEL_OFF 6
+
+#if !defined(SPDLOG_ACTIVE_LEVEL)
+#define SPDLOG_ACTIVE_LEVEL SPDLOG_LEVEL_INFO
+#endif
+
+// Log level enum
+namespace level {
+enum level_enum
+{
+    trace = SPDLOG_LEVEL_TRACE,
+    debug = SPDLOG_LEVEL_DEBUG,
+    info = SPDLOG_LEVEL_INFO,
+    warn = SPDLOG_LEVEL_WARN,
+    err = SPDLOG_LEVEL_ERROR,
+    critical = SPDLOG_LEVEL_CRITICAL,
+    off = SPDLOG_LEVEL_OFF,
+};
+
+#if !defined(SPDLOG_LEVEL_NAMES)
+#define SPDLOG_LEVEL_NAMES                                                                                                                 \
+    {                                                                                                                                      \
+        "trace", "debug", "info", "warning", "error", "critical", "off"                                                                    \
+    }
+#endif
+
+static string_view_t level_string_views[] SPDLOG_LEVEL_NAMES;
+static const char *short_level_names[]{"T", "D", "I", "W", "E", "C", "O"};
+
+inline string_view_t &to_string_view(spdlog::level::level_enum l) SPDLOG_NOEXCEPT
+{
+    return level_string_views[l];
+}
+
+inline const char *to_short_c_str(spdlog::level::level_enum l) SPDLOG_NOEXCEPT
+{
+    return short_level_names[l];
+}
+
+inline spdlog::level::level_enum from_str(const std::string &name) SPDLOG_NOEXCEPT
+{
+    int level = 0;
+    for (const auto &level_str : level_string_views)
+    {
+        if (level_str == name)
+        {
+            return static_cast<level::level_enum>(level);
+        }
+        level++;
+    }
+    return level::off;
+}
+
+using level_hasher = std::hash<int>;
+} // namespace level
+
+//
+// Pattern time - specific time getting to use for pattern_formatter.
+// local time by default
+//
+enum class pattern_time_type
+{
+    local, // log localtime
+    utc    // log utc
+};
+
+//
+// Log exception
+//
+class spdlog_ex : public std::exception
+{
+public:
+    explicit spdlog_ex(std::string msg)
+        : msg_(std::move(msg))
+    {
+    }
+
+    spdlog_ex(const std::string &msg, int last_errno)
+    {
+        fmt::memory_buffer outbuf;
+        fmt::format_system_error(outbuf, last_errno, msg);
+        msg_ = fmt::to_string(outbuf);
+    }
+
+    const char *what() const SPDLOG_NOEXCEPT override
+    {
+        return msg_.c_str();
+    }
+
+private:
+    std::string msg_;
+};
+
+//
+// wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined)
+//
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+using filename_t = std::wstring;
+#else
+using filename_t = std::string;
+#endif
+
+struct source_loc
+{
+    SPDLOG_CONSTEXPR source_loc()
+        : filename{""}
+        , line{0}
+        , funcname{""}
+    {
+    }
+    SPDLOG_CONSTEXPR source_loc(const char *filename, int line, const char *funcname)
+        : filename{filename}
+        , line{static_cast<uint32_t>(line)}
+        , funcname{funcname}
+    {
+    }
+
+    SPDLOG_CONSTEXPR bool empty() const SPDLOG_NOEXCEPT
+    {
+        return line == 0;
+    }
+    const char *filename;
+    uint32_t line;
+    const char *funcname;
+};
+
+namespace details {
+// make_unique support for pre c++14
+
+#if __cplusplus >= 201402L // C++14 and beyond
+using std::make_unique;
+#else
+template<typename T, typename... Args>
+std::unique_ptr<T> make_unique(Args &&... args)
+{
+    static_assert(!std::is_array<T>::value, "arrays not supported");
+    return std::unique_ptr<T>(new T(std::forward<Args>(args)...));
+}
+#endif
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/details/async_logger_impl.h

@@ -0,0 +1,110 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+// async logger implementation
+// uses a thread pool to perform the actual logging
+
+#include "spdlog/details/thread_pool.h"
+
+#include <chrono>
+#include <memory>
+#include <string>
+
+template<typename It>
+inline spdlog::async_logger::async_logger(
+    std::string logger_name, It begin, It end, std::weak_ptr<details::thread_pool> tp, async_overflow_policy overflow_policy)
+    : logger(std::move(logger_name), begin, end)
+    , thread_pool_(std::move(tp))
+    , overflow_policy_(overflow_policy)
+{
+}
+
+inline spdlog::async_logger::async_logger(
+    std::string logger_name, sinks_init_list sinks_list, std::weak_ptr<details::thread_pool> tp, async_overflow_policy overflow_policy)
+    : async_logger(std::move(logger_name), sinks_list.begin(), sinks_list.end(), std::move(tp), overflow_policy)
+{
+}
+
+inline spdlog::async_logger::async_logger(
+    std::string logger_name, sink_ptr single_sink, std::weak_ptr<details::thread_pool> tp, async_overflow_policy overflow_policy)
+    : async_logger(std::move(logger_name), {std::move(single_sink)}, std::move(tp), overflow_policy)
+{
+}
+
+// send the log message to the thread pool
+inline void spdlog::async_logger::sink_it_(details::log_msg &msg)
+{
+#if defined(SPDLOG_ENABLE_MESSAGE_COUNTER)
+    incr_msg_counter_(msg);
+#endif
+    if (auto pool_ptr = thread_pool_.lock())
+    {
+        pool_ptr->post_log(shared_from_this(), msg, overflow_policy_);
+    }
+    else
+    {
+        throw spdlog_ex("async log: thread pool doesn't exist anymore");
+    }
+}
+
+// send flush request to the thread pool
+inline void spdlog::async_logger::flush_()
+{
+    if (auto pool_ptr = thread_pool_.lock())
+    {
+        pool_ptr->post_flush(shared_from_this(), overflow_policy_);
+    }
+    else
+    {
+        throw spdlog_ex("async flush: thread pool doesn't exist anymore");
+    }
+}
+
+//
+// backend functions - called from the thread pool to do the actual job
+//
+inline void spdlog::async_logger::backend_log_(const details::log_msg &incoming_log_msg)
+{
+    try
+    {
+        for (auto &s : sinks_)
+        {
+            if (s->should_log(incoming_log_msg.level))
+            {
+                s->log(incoming_log_msg);
+            }
+        }
+    }
+    SPDLOG_CATCH_AND_HANDLE
+
+    if (should_flush_(incoming_log_msg))
+    {
+        backend_flush_();
+    }
+}
+
+inline void spdlog::async_logger::backend_flush_()
+{
+    try
+    {
+        for (auto &sink : sinks_)
+        {
+            sink->flush();
+        }
+    }
+    SPDLOG_CATCH_AND_HANDLE
+}
+
+inline std::shared_ptr<spdlog::logger> spdlog::async_logger::clone(std::string new_name)
+{
+    auto cloned = std::make_shared<spdlog::async_logger>(std::move(new_name), sinks_.begin(), sinks_.end(), thread_pool_, overflow_policy_);
+
+    cloned->set_level(this->level());
+    cloned->flush_on(this->flush_level());
+    cloned->set_error_handler(this->error_handler());
+    return std::move(cloned);
+}

third_party/spdlog/include/spdlog/details/circular_q.h

@@ -0,0 +1,72 @@
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+// cirucal q view of std::vector.
+#pragma once
+
+#include <vector>
+
+namespace spdlog {
+namespace details {
+template<typename T>
+class circular_q
+{
+public:
+    using item_type = T;
+
+    explicit circular_q(size_t max_items)
+        : max_items_(max_items + 1) // one item is reserved as marker for full q
+        , v_(max_items_)
+    {
+    }
+
+    // push back, overrun (oldest) item if no room left
+    void push_back(T &&item)
+    {
+        v_[tail_] = std::move(item);
+        tail_ = (tail_ + 1) % max_items_;
+
+        if (tail_ == head_) // overrun last item if full
+        {
+            head_ = (head_ + 1) % max_items_;
+            ++overrun_counter_;
+        }
+    }
+
+    // Pop item from front.
+    // If there are no elements in the container, the behavior is undefined.
+    void pop_front(T &popped_item)
+    {
+        popped_item = std::move(v_[head_]);
+        head_ = (head_ + 1) % max_items_;
+    }
+
+    bool empty()
+    {
+        return tail_ == head_;
+    }
+
+    bool full()
+    {
+        // head is ahead of the tail by 1
+        return ((tail_ + 1) % max_items_) == head_;
+    }
+
+    size_t overrun_counter() const
+    {
+        return overrun_counter_;
+    }
+
+private:
+    size_t max_items_;
+    typename std::vector<T>::size_type head_ = 0;
+    typename std::vector<T>::size_type tail_ = 0;
+
+    std::vector<T> v_;
+
+    size_t overrun_counter_ = 0;
+};
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/details/console_globals.h

@@ -0,0 +1,74 @@
+#pragma once
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#include "spdlog/details/null_mutex.h"
+#include <cstdio>
+#include <mutex>
+
+#ifdef _WIN32
+
+#ifndef NOMINMAX
+#define NOMINMAX // prevent windows redefining min/max
+#endif
+
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+
+#include <windows.h>
+#endif
+
+namespace spdlog {
+namespace details {
+struct console_stdout
+{
+    static std::FILE *stream()
+    {
+        return stdout;
+    }
+#ifdef _WIN32
+    static HANDLE handle()
+    {
+        return ::GetStdHandle(STD_OUTPUT_HANDLE);
+    }
+#endif
+};
+
+struct console_stderr
+{
+    static std::FILE *stream()
+    {
+        return stderr;
+    }
+#ifdef _WIN32
+    static HANDLE handle()
+    {
+        return ::GetStdHandle(STD_ERROR_HANDLE);
+    }
+#endif
+};
+
+struct console_mutex
+{
+    using mutex_t = std::mutex;
+    static mutex_t &mutex()
+    {
+        static mutex_t s_mutex;
+        return s_mutex;
+    }
+};
+
+struct console_nullmutex
+{
+    using mutex_t = null_mutex;
+    static mutex_t &mutex()
+    {
+        static mutex_t s_mutex;
+        return s_mutex;
+    }
+};
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/details/file_helper.h

@@ -0,0 +1,152 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+// Helper class for file sinks.
+// When failing to open a file, retry several times(5) with a delay interval(10 ms).
+// Throw spdlog_ex exception on errors.
+
+#include "spdlog/details/log_msg.h"
+#include "spdlog/details/os.h"
+
+#include <cerrno>
+#include <chrono>
+#include <cstdio>
+#include <string>
+#include <thread>
+#include <tuple>
+
+namespace spdlog {
+namespace details {
+
+class file_helper
+{
+
+public:
+    const int open_tries = 5;
+    const int open_interval = 10;
+
+    explicit file_helper() = default;
+
+    file_helper(const file_helper &) = delete;
+    file_helper &operator=(const file_helper &) = delete;
+
+    ~file_helper()
+    {
+        close();
+    }
+
+    void open(const filename_t &fname, bool truncate = false)
+    {
+        close();
+        auto *mode = truncate ? SPDLOG_FILENAME_T("wb") : SPDLOG_FILENAME_T("ab");
+        _filename = fname;
+        for (int tries = 0; tries < open_tries; ++tries)
+        {
+            if (!os::fopen_s(&fd_, fname, mode))
+            {
+                return;
+            }
+
+            details::os::sleep_for_millis(open_interval);
+        }
+
+        throw spdlog_ex("Failed opening file " + os::filename_to_str(_filename) + " for writing", errno);
+    }
+
+    void reopen(bool truncate)
+    {
+        if (_filename.empty())
+        {
+            throw spdlog_ex("Failed re opening file - was not opened before");
+        }
+        open(_filename, truncate);
+    }
+
+    void flush()
+    {
+        std::fflush(fd_);
+    }
+
+    void close()
+    {
+        if (fd_ != nullptr)
+        {
+            std::fclose(fd_);
+            fd_ = nullptr;
+        }
+    }
+
+    void write(const fmt::memory_buffer &buf)
+    {
+        size_t msg_size = buf.size();
+        auto data = buf.data();
+        if (std::fwrite(data, 1, msg_size, fd_) != msg_size)
+        {
+            throw spdlog_ex("Failed writing to file " + os::filename_to_str(_filename), errno);
+        }
+    }
+
+    size_t size() const
+    {
+        if (fd_ == nullptr)
+        {
+            throw spdlog_ex("Cannot use size() on closed file " + os::filename_to_str(_filename));
+        }
+        return os::filesize(fd_);
+    }
+
+    const filename_t &filename() const
+    {
+        return _filename;
+    }
+
+    static bool file_exists(const filename_t &fname)
+    {
+        return os::file_exists(fname);
+    }
+
+    //
+    // return file path and its extension:
+    //
+    // "mylog.txt" => ("mylog", ".txt")
+    // "mylog" => ("mylog", "")
+    // "mylog." => ("mylog.", "")
+    // "/dir1/dir2/mylog.txt" => ("/dir1/dir2/mylog", ".txt")
+    //
+    // the starting dot in filenames is ignored (hidden files):
+    //
+    // ".mylog" => (".mylog". "")
+    // "my_folder/.mylog" => ("my_folder/.mylog", "")
+    // "my_folder/.mylog.txt" => ("my_folder/.mylog", ".txt")
+    static std::tuple<filename_t, filename_t> split_by_extension(const spdlog::filename_t &fname)
+    {
+        auto ext_index = fname.rfind('.');
+
+        // no valid extension found - return whole path and empty string as
+        // extension
+        if (ext_index == filename_t::npos || ext_index == 0 || ext_index == fname.size() - 1)
+        {
+            return std::make_tuple(fname, spdlog::filename_t());
+        }
+
+        // treat casese like "/etc/rc.d/somelogfile or "/abc/.hiddenfile"
+        auto folder_index = fname.rfind(details::os::folder_sep);
+        if (folder_index != filename_t::npos && folder_index >= ext_index - 1)
+        {
+            return std::make_tuple(fname, spdlog::filename_t());
+        }
+
+        // finally - return a valid base and extension tuple
+        return std::make_tuple(fname.substr(0, ext_index), fname.substr(ext_index));
+    }
+
+private:
+    std::FILE *fd_{nullptr};
+    filename_t _filename;
+};
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/details/fmt_helper.h

@@ -0,0 +1,122 @@
+//
+// Created by gabi on 6/15/18.
+//
+
+#pragma once
+
+#include <chrono>
+#include <type_traits>
+#include "spdlog/fmt/fmt.h"
+
+// Some fmt helpers to efficiently format and pad ints and strings
+namespace spdlog {
+namespace details {
+namespace fmt_helper {
+
+template<size_t Buffer_Size>
+inline spdlog::string_view_t to_string_view(const fmt::basic_memory_buffer<char, Buffer_Size> &buf) SPDLOG_NOEXCEPT
+{
+    return spdlog::string_view_t(buf.data(), buf.size());
+}
+
+template<size_t Buffer_Size1, size_t Buffer_Size2>
+inline void append_buf(const fmt::basic_memory_buffer<char, Buffer_Size1> &buf, fmt::basic_memory_buffer<char, Buffer_Size2> &dest)
+{
+    auto *buf_ptr = buf.data();
+    dest.append(buf_ptr, buf_ptr + buf.size());
+}
+
+template<size_t Buffer_Size>
+inline void append_string_view(spdlog::string_view_t view, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
+{
+    auto *buf_ptr = view.data();
+    if (buf_ptr != nullptr)
+    {
+        dest.append(buf_ptr, buf_ptr + view.size());
+    }
+}
+
+template<typename T, size_t Buffer_Size>
+inline void append_int(T n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
+{
+    fmt::format_int i(n);
+    dest.append(i.data(), i.data() + i.size());
+}
+
+template<typename T>
+inline unsigned count_digits(T n)
+{
+    using count_type = typename std::conditional<(sizeof(T) > sizeof(uint32_t)), uint64_t, uint32_t>::type;
+    return static_cast<unsigned>(fmt::internal::count_digits(static_cast<count_type>(n)));
+}
+
+template<size_t Buffer_Size>
+inline void pad2(int n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
+{
+    if (n > 99)
+    {
+        append_int(n, dest);
+    }
+    else if (n > 9) // 10-99
+    {
+        dest.push_back(static_cast<char>('0' + n / 10));
+        dest.push_back(static_cast<char>('0' + n % 10));
+    }
+    else if (n >= 0) // 0-9
+    {
+        dest.push_back('0');
+        dest.push_back(static_cast<char>('0' + n));
+    }
+    else // negatives (unlikely, but just in case, let fmt deal with it)
+    {
+        fmt::format_to(dest, "{:02}", n);
+    }
+}
+
+template<typename T, size_t Buffer_Size>
+inline void pad_uint(T n, unsigned int width, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
+{
+    static_assert(std::is_unsigned<T>::value, "pad_uint must get unsigned T");
+    auto digits = count_digits(n);
+    if (width > digits)
+    {
+        const char *zeroes = "0000000000000000000";
+        dest.append(zeroes, zeroes + width - digits);
+    }
+    append_int(n, dest);
+}
+
+template<typename T, size_t Buffer_Size>
+inline void pad3(T n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
+{
+    pad_uint(n, 3, dest);
+}
+
+template<typename T, size_t Buffer_Size>
+inline void pad6(T n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
+{
+    pad_uint(n, 6, dest);
+}
+
+template<typename T, size_t Buffer_Size>
+inline void pad9(T n, fmt::basic_memory_buffer<char, Buffer_Size> &dest)
+{
+    pad_uint(n, 9, dest);
+}
+
+// return fraction of a second of the given time_point.
+// e.g.
+// fraction<std::milliseconds>(tp) -> will return the millis part of the second
+template<typename ToDuration>
+inline ToDuration time_fraction(const log_clock::time_point &tp)
+{
+    using std::chrono::duration_cast;
+    using std::chrono::seconds;
+    auto duration = tp.time_since_epoch();
+    auto secs = duration_cast<seconds>(duration);
+    return duration_cast<ToDuration>(duration) - duration_cast<ToDuration>(secs);
+}
+
+} // namespace fmt_helper
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/details/log_msg.h

@@ -0,0 +1,55 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+#include "spdlog/common.h"
+#include "spdlog/details/os.h"
+
+#include <string>
+#include <utility>
+
+namespace spdlog {
+namespace details {
+struct log_msg
+{
+
+    log_msg(source_loc loc, const std::string *loggers_name, level::level_enum lvl, string_view_t view)
+        : logger_name(loggers_name)
+        , level(lvl)
+#ifndef SPDLOG_NO_DATETIME
+        , time(os::now())
+#endif
+
+#ifndef SPDLOG_NO_THREAD_ID
+        , thread_id(os::thread_id())
+#endif
+        , source(loc)
+        , payload(view)
+    {
+    }
+
+    log_msg(const std::string *loggers_name, level::level_enum lvl, string_view_t view)
+        : log_msg(source_loc{}, loggers_name, lvl, view)
+    {
+    }
+
+    log_msg(const log_msg &other) = default;
+
+    const std::string *logger_name{nullptr};
+    level::level_enum level{level::off};
+    log_clock::time_point time;
+    size_t thread_id{0};
+    size_t msg_id{0};
+
+    // wrapping the formatted text with color (updated by pattern_formatter).
+    mutable size_t color_range_start{0};
+    mutable size_t color_range_end{0};
+
+    source_loc source;
+    const string_view_t payload;
+};
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/details/logger_impl.h

@@ -0,0 +1,441 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+#include "spdlog/details/fmt_helper.h"
+
+#include <memory>
+#include <string>
+
+#define SPDLOG_CATCH_AND_HANDLE                                                                                                            \
+    catch (const std::exception &ex)                                                                                                       \
+    {                                                                                                                                      \
+        err_handler_(ex.what());                                                                                                           \
+    }                                                                                                                                      \
+    catch (...)                                                                                                                            \
+    {                                                                                                                                      \
+        err_handler_("Unknown exception in logger");                                                                                       \
+    }
+
+// create logger with given name, sinks and the default pattern formatter
+// all other ctors will call this one
+template<typename It>
+inline spdlog::logger::logger(std::string logger_name, It begin, It end)
+    : name_(std::move(logger_name))
+    , sinks_(begin, end)
+{
+}
+
+// ctor with sinks as init list
+inline spdlog::logger::logger(std::string logger_name, sinks_init_list sinks_list)
+    : logger(std::move(logger_name), sinks_list.begin(), sinks_list.end())
+{
+}
+
+// ctor with single sink
+inline spdlog::logger::logger(std::string logger_name, spdlog::sink_ptr single_sink)
+    : logger(std::move(logger_name), {std::move(single_sink)})
+{
+}
+
+inline spdlog::logger::~logger() = default;
+
+inline void spdlog::logger::set_formatter(std::unique_ptr<spdlog::formatter> f)
+{
+    for (auto &sink : sinks_)
+    {
+        sink->set_formatter(f->clone());
+    }
+}
+
+inline void spdlog::logger::set_pattern(std::string pattern, pattern_time_type time_type)
+{
+    auto new_formatter = details::make_unique<spdlog::pattern_formatter>(std::move(pattern), time_type);
+    set_formatter(std::move(new_formatter));
+}
+
+template<typename... Args>
+inline void spdlog::logger::log(source_loc source, level::level_enum lvl, const char *fmt, const Args &... args)
+{
+    if (!should_log(lvl))
+    {
+        return;
+    }
+
+    try
+    {
+        using details::fmt_helper::to_string_view;
+        fmt::memory_buffer buf;
+        fmt::format_to(buf, fmt, args...);
+        details::log_msg log_msg(source, &name_, lvl, to_string_view(buf));
+        sink_it_(log_msg);
+    }
+    SPDLOG_CATCH_AND_HANDLE
+}
+
+template<typename... Args>
+inline void spdlog::logger::log(level::level_enum lvl, const char *fmt, const Args &... args)
+{
+    log(source_loc{}, lvl, fmt, args...);
+}
+
+inline void spdlog::logger::log(source_loc source, level::level_enum lvl, const char *msg)
+{
+    if (!should_log(lvl))
+    {
+        return;
+    }
+
+    try
+    {
+        details::log_msg log_msg(source, &name_, lvl, spdlog::string_view_t(msg));
+        sink_it_(log_msg);
+    }
+    SPDLOG_CATCH_AND_HANDLE
+}
+
+inline void spdlog::logger::log(level::level_enum lvl, const char *msg)
+{
+    log(source_loc{}, lvl, msg);
+}
+
+template<class T, typename std::enable_if<std::is_convertible<T, spdlog::string_view_t>::value, T>::type *>
+inline void spdlog::logger::log(source_loc source, level::level_enum lvl, const T &msg)
+{
+    if (!should_log(lvl))
+    {
+        return;
+    }
+    try
+    {
+        details::log_msg log_msg(source, &name_, lvl, msg);
+        sink_it_(log_msg);
+    }
+    SPDLOG_CATCH_AND_HANDLE
+}
+
+template<class T, typename std::enable_if<std::is_convertible<T, spdlog::string_view_t>::value, T>::type *>
+inline void spdlog::logger::log(level::level_enum lvl, const T &msg)
+{
+    log(source_loc{}, lvl, msg);
+}
+
+template<class T, typename std::enable_if<!std::is_convertible<T, spdlog::string_view_t>::value, T>::type *>
+inline void spdlog::logger::log(source_loc source, level::level_enum lvl, const T &msg)
+{
+    if (!should_log(lvl))
+    {
+        return;
+    }
+    try
+    {
+        using details::fmt_helper::to_string_view;
+        fmt::memory_buffer buf;
+        fmt::format_to(buf, "{}", msg);
+        details::log_msg log_msg(source, &name_, lvl, to_string_view(buf));
+        sink_it_(log_msg);
+    }
+    SPDLOG_CATCH_AND_HANDLE
+}
+
+template<class T, typename std::enable_if<!std::is_convertible<T, spdlog::string_view_t>::value, T>::type *>
+inline void spdlog::logger::log(level::level_enum lvl, const T &msg)
+{
+    log(source_loc{}, lvl, msg);
+}
+
+template<typename... Args>
+inline void spdlog::logger::trace(const char *fmt, const Args &... args)
+{
+    log(level::trace, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::debug(const char *fmt, const Args &... args)
+{
+    log(level::debug, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::info(const char *fmt, const Args &... args)
+{
+    log(level::info, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::warn(const char *fmt, const Args &... args)
+{
+    log(level::warn, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::error(const char *fmt, const Args &... args)
+{
+    log(level::err, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::critical(const char *fmt, const Args &... args)
+{
+    log(level::critical, fmt, args...);
+}
+
+template<typename T>
+inline void spdlog::logger::trace(const T &msg)
+{
+    log(level::trace, msg);
+}
+
+template<typename T>
+inline void spdlog::logger::debug(const T &msg)
+{
+    log(level::debug, msg);
+}
+
+template<typename T>
+inline void spdlog::logger::info(const T &msg)
+{
+    log(level::info, msg);
+}
+
+template<typename T>
+inline void spdlog::logger::warn(const T &msg)
+{
+    log(level::warn, msg);
+}
+
+template<typename T>
+inline void spdlog::logger::error(const T &msg)
+{
+    log(level::err, msg);
+}
+
+template<typename T>
+inline void spdlog::logger::critical(const T &msg)
+{
+    log(level::critical, msg);
+}
+
+#ifdef SPDLOG_WCHAR_TO_UTF8_SUPPORT
+
+inline void wbuf_to_utf8buf(const fmt::wmemory_buffer &wbuf, fmt::memory_buffer &target)
+{
+    int wbuf_size = static_cast<int>(wbuf.size());
+    if (wbuf_size == 0)
+    {
+        return;
+    }
+
+    auto result_size = ::WideCharToMultiByte(CP_UTF8, 0, wbuf.data(), wbuf_size, NULL, 0, NULL, NULL);
+
+    if (result_size > 0)
+    {
+        target.resize(result_size);
+        ::WideCharToMultiByte(CP_UTF8, 0, wbuf.data(), wbuf_size, &target.data()[0], result_size, NULL, NULL);
+    }
+    else
+    {
+        throw spdlog::spdlog_ex(fmt::format("WideCharToMultiByte failed. Last error: {}", ::GetLastError()));
+    }
+}
+
+template<typename... Args>
+inline void spdlog::logger::log(source_loc source, level::level_enum lvl, const wchar_t *fmt, const Args &... args)
+{
+    if (!should_log(lvl))
+    {
+        return;
+    }
+
+    try
+    {
+        // format to wmemory_buffer and convert to utf8
+        using details::fmt_helper::to_string_view;
+        fmt::wmemory_buffer wbuf;
+        fmt::format_to(wbuf, fmt, args...);
+        fmt::memory_buffer buf;
+        wbuf_to_utf8buf(wbuf, buf);
+        details::log_msg log_msg(source, &name_, lvl, to_string_view(buf));
+        sink_it_(log_msg);
+    }
+    SPDLOG_CATCH_AND_HANDLE
+}
+
+template<typename... Args>
+inline void spdlog::logger::log(level::level_enum lvl, const wchar_t *fmt, const Args &... args)
+{
+    log(source_loc{}, lvl, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::trace(const wchar_t *fmt, const Args &... args)
+{
+    log(level::trace, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::debug(const wchar_t *fmt, const Args &... args)
+{
+    log(level::debug, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::info(const wchar_t *fmt, const Args &... args)
+{
+    log(level::info, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::warn(const wchar_t *fmt, const Args &... args)
+{
+    log(level::warn, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::error(const wchar_t *fmt, const Args &... args)
+{
+    log(level::err, fmt, args...);
+}
+
+template<typename... Args>
+inline void spdlog::logger::critical(const wchar_t *fmt, const Args &... args)
+{
+    log(level::critical, fmt, args...);
+}
+
+#endif // SPDLOG_WCHAR_TO_UTF8_SUPPORT
+
+//
+// name and level
+//
+inline const std::string &spdlog::logger::name() const
+{
+    return name_;
+}
+
+inline void spdlog::logger::set_level(spdlog::level::level_enum log_level)
+{
+    level_.store(log_level);
+}
+
+inline void spdlog::logger::set_error_handler(spdlog::log_err_handler err_handler)
+{
+    err_handler_ = std::move(err_handler);
+}
+
+inline spdlog::log_err_handler spdlog::logger::error_handler() const
+{
+    return err_handler_;
+}
+
+inline void spdlog::logger::flush()
+{
+    try
+    {
+        flush_();
+    }
+    SPDLOG_CATCH_AND_HANDLE
+}
+
+inline void spdlog::logger::flush_on(level::level_enum log_level)
+{
+    flush_level_.store(log_level);
+}
+
+inline spdlog::level::level_enum spdlog::logger::flush_level() const
+{
+    return static_cast<spdlog::level::level_enum>(flush_level_.load(std::memory_order_relaxed));
+}
+
+inline bool spdlog::logger::should_flush_(const details::log_msg &msg)
+{
+    auto flush_level = flush_level_.load(std::memory_order_relaxed);
+    return (msg.level >= flush_level) && (msg.level != level::off);
+}
+
+inline spdlog::level::level_enum spdlog::logger::default_level()
+{
+    return static_cast<spdlog::level::level_enum>(SPDLOG_ACTIVE_LEVEL);
+}
+
+inline spdlog::level::level_enum spdlog::logger::level() const
+{
+    return static_cast<spdlog::level::level_enum>(level_.load(std::memory_order_relaxed));
+}
+
+inline bool spdlog::logger::should_log(spdlog::level::level_enum msg_level) const
+{
+    return msg_level >= level_.load(std::memory_order_relaxed);
+}
+
+//
+// protected virtual called at end of each user log call (if enabled) by the
+// line_logger
+//
+inline void spdlog::logger::sink_it_(details::log_msg &msg)
+{
+#if defined(SPDLOG_ENABLE_MESSAGE_COUNTER)
+    incr_msg_counter_(msg);
+#endif
+    for (auto &sink : sinks_)
+    {
+        if (sink->should_log(msg.level))
+        {
+            sink->log(msg);
+        }
+    }
+
+    if (should_flush_(msg))
+    {
+        flush_();
+    }
+}
+
+inline void spdlog::logger::flush_()
+{
+    for (auto &sink : sinks_)
+    {
+        sink->flush();
+    }
+}
+
+inline void spdlog::logger::default_err_handler_(const std::string &msg)
+{
+    auto now = time(nullptr);
+    if (now - last_err_time_ < 60)
+    {
+        return;
+    }
+    last_err_time_ = now;
+    auto tm_time = details::os::localtime(now);
+    char date_buf[100];
+    std::strftime(date_buf, sizeof(date_buf), "%Y-%m-%d %H:%M:%S", &tm_time);
+    fmt::print(stderr, "[*** LOG ERROR ***] [{}] [{}] {}\n", date_buf, name(), msg);
+}
+
+inline void spdlog::logger::incr_msg_counter_(details::log_msg &msg)
+{
+    msg.msg_id = msg_counter_.fetch_add(1, std::memory_order_relaxed);
+}
+
+inline const std::vector<spdlog::sink_ptr> &spdlog::logger::sinks() const
+{
+    return sinks_;
+}
+
+inline std::vector<spdlog::sink_ptr> &spdlog::logger::sinks()
+{
+    return sinks_;
+}
+
+inline std::shared_ptr<spdlog::logger> spdlog::logger::clone(std::string logger_name)
+{
+    auto cloned = std::make_shared<spdlog::logger>(std::move(logger_name), sinks_.begin(), sinks_.end());
+    cloned->set_level(this->level());
+    cloned->flush_on(this->flush_level());
+    cloned->set_error_handler(this->error_handler());
+    return cloned;
+}

third_party/spdlog/include/spdlog/details/mpmc_blocking_q.h

@@ -0,0 +1,121 @@
+#pragma once
+
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+// multi producer-multi consumer blocking queue.
+// enqueue(..) - will block until room found to put the new message.
+// enqueue_nowait(..) - will return immediately with false if no room left in
+// the queue.
+// dequeue_for(..) - will block until the queue is not empty or timeout have
+// passed.
+
+#include "spdlog/details/circular_q.h"
+
+#include <condition_variable>
+#include <mutex>
+
+namespace spdlog {
+namespace details {
+
+template<typename T>
+class mpmc_blocking_queue
+{
+public:
+    using item_type = T;
+    explicit mpmc_blocking_queue(size_t max_items)
+        : q_(max_items)
+    {
+    }
+
+#ifndef __MINGW32__
+    // try to enqueue and block if no room left
+    void enqueue(T &&item)
+    {
+        {
+            std::unique_lock<std::mutex> lock(queue_mutex_);
+            pop_cv_.wait(lock, [this] { return !this->q_.full(); });
+            q_.push_back(std::move(item));
+        }
+        push_cv_.notify_one();
+    }
+
+    // enqueue immediately. overrun oldest message in the queue if no room left.
+    void enqueue_nowait(T &&item)
+    {
+        {
+            std::unique_lock<std::mutex> lock(queue_mutex_);
+            q_.push_back(std::move(item));
+        }
+        push_cv_.notify_one();
+    }
+
+    // try to dequeue item. if no item found. wait upto timeout and try again
+    // Return true, if succeeded dequeue item, false otherwise
+    bool dequeue_for(T &popped_item, std::chrono::milliseconds wait_duration)
+    {
+        {
+            std::unique_lock<std::mutex> lock(queue_mutex_);
+            if (!push_cv_.wait_for(lock, wait_duration, [this] { return !this->q_.empty(); }))
+            {
+                return false;
+            }
+            q_.pop_front(popped_item);
+        }
+        pop_cv_.notify_one();
+        return true;
+    }
+
+#else
+    // apparently mingw deadlocks if the mutex is released before cv.notify_one(),
+    // so release the mutex at the very end each function.
+
+    // try to enqueue and block if no room left
+    void enqueue(T &&item)
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        pop_cv_.wait(lock, [this] { return !this->q_.full(); });
+        q_.push_back(std::move(item));
+        push_cv_.notify_one();
+    }
+
+    // enqueue immediately. overrun oldest message in the queue if no room left.
+    void enqueue_nowait(T &&item)
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        q_.push_back(std::move(item));
+        push_cv_.notify_one();
+    }
+
+    // try to dequeue item. if no item found. wait upto timeout and try again
+    // Return true, if succeeded dequeue item, false otherwise
+    bool dequeue_for(T &popped_item, std::chrono::milliseconds wait_duration)
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        if (!push_cv_.wait_for(lock, wait_duration, [this] { return !this->q_.empty(); }))
+        {
+            return false;
+        }
+        q_.pop_front(popped_item);
+        pop_cv_.notify_one();
+        return true;
+    }
+
+#endif
+
+    size_t overrun_counter()
+    {
+        std::unique_lock<std::mutex> lock(queue_mutex_);
+        return q_.overrun_counter();
+    }
+
+private:
+    std::mutex queue_mutex_;
+    std::condition_variable push_cv_;
+    std::condition_variable pop_cv_;
+    spdlog::details::circular_q<T> q_;
+};
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/details/null_mutex.h

@@ -0,0 +1,45 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+#include <atomic>
+// null, no cost dummy "mutex" and dummy "atomic" int
+
+namespace spdlog {
+namespace details {
+struct null_mutex
+{
+    void lock() {}
+    void unlock() {}
+    bool try_lock()
+    {
+        return true;
+    }
+};
+
+struct null_atomic_int
+{
+    int value;
+    null_atomic_int() = default;
+
+    explicit null_atomic_int(int val)
+        : value(val)
+    {
+    }
+
+    int load(std::memory_order) const
+    {
+        return value;
+    }
+
+    void store(int val)
+    {
+        value = val;
+    }
+};
+
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/details/os.h

@@ -0,0 +1,421 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+#pragma once
+
+#include "../common.h"
+
+#include <algorithm>
+#include <chrono>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <functional>
+#include <string>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <thread>
+
+#ifdef _WIN32
+
+#ifndef NOMINMAX
+#define NOMINMAX // prevent windows redefining min/max
+#endif
+
+#ifndef WIN32_LEAN_AND_MEAN
+#define WIN32_LEAN_AND_MEAN
+#endif
+#include <io.h>      // _get_osfhandle and _isatty support
+#include <process.h> //  _get_pid support
+#include <windows.h>
+
+#ifdef __MINGW32__
+#include <share.h>
+#endif
+
+#else // unix
+
+#include <fcntl.h>
+#include <unistd.h>
+
+#ifdef __linux__
+#include <sys/syscall.h> //Use gettid() syscall under linux to get thread id
+
+#elif __FreeBSD__
+#include <sys/thr.h> //Use thr_self() syscall under FreeBSD to get thread id
+#endif
+
+#endif // unix
+
+#ifndef __has_feature      // Clang - feature checking macros.
+#define __has_feature(x) 0 // Compatibility with non-clang compilers.
+#endif
+
+namespace spdlog {
+namespace details {
+namespace os {
+
+inline spdlog::log_clock::time_point now() SPDLOG_NOEXCEPT
+{
+
+#if defined __linux__ && defined SPDLOG_CLOCK_COARSE
+    timespec ts;
+    ::clock_gettime(CLOCK_REALTIME_COARSE, &ts);
+    return std::chrono::time_point<log_clock, typename log_clock::duration>(
+        std::chrono::duration_cast<typename log_clock::duration>(std::chrono::seconds(ts.tv_sec) + std::chrono::nanoseconds(ts.tv_nsec)));
+
+#else
+    return log_clock::now();
+#endif
+}
+inline std::tm localtime(const std::time_t &time_tt) SPDLOG_NOEXCEPT
+{
+
+#ifdef _WIN32
+    std::tm tm;
+    localtime_s(&tm, &time_tt);
+#else
+    std::tm tm;
+    localtime_r(&time_tt, &tm);
+#endif
+    return tm;
+}
+
+inline std::tm localtime() SPDLOG_NOEXCEPT
+{
+    std::time_t now_t = time(nullptr);
+    return localtime(now_t);
+}
+
+inline std::tm gmtime(const std::time_t &time_tt) SPDLOG_NOEXCEPT
+{
+
+#ifdef _WIN32
+    std::tm tm;
+    gmtime_s(&tm, &time_tt);
+#else
+    std::tm tm;
+    gmtime_r(&time_tt, &tm);
+#endif
+    return tm;
+}
+
+inline std::tm gmtime() SPDLOG_NOEXCEPT
+{
+    std::time_t now_t = time(nullptr);
+    return gmtime(now_t);
+}
+
+// eol definition
+#if !defined(SPDLOG_EOL)
+#ifdef _WIN32
+#define SPDLOG_EOL "\r\n"
+#else
+#define SPDLOG_EOL "\n"
+#endif
+#endif
+
+SPDLOG_CONSTEXPR static const char *default_eol = SPDLOG_EOL;
+
+// folder separator
+#ifdef _WIN32
+SPDLOG_CONSTEXPR static const char folder_sep = '\\';
+#else
+SPDLOG_CONSTEXPR static const char folder_sep = '/';
+#endif
+
+inline void prevent_child_fd(FILE *f)
+{
+
+#ifdef _WIN32
+#if !defined(__cplusplus_winrt)
+    auto file_handle = (HANDLE)_get_osfhandle(_fileno(f));
+    if (!::SetHandleInformation(file_handle, HANDLE_FLAG_INHERIT, 0))
+        throw spdlog_ex("SetHandleInformation failed", errno);
+#endif
+#else
+    auto fd = fileno(f);
+    if (fcntl(fd, F_SETFD, FD_CLOEXEC) == -1)
+    {
+        throw spdlog_ex("fcntl with FD_CLOEXEC failed", errno);
+    }
+#endif
+}
+
+// fopen_s on non windows for writing
+inline bool fopen_s(FILE **fp, const filename_t &filename, const filename_t &mode)
+{
+#ifdef _WIN32
+#ifdef SPDLOG_WCHAR_FILENAMES
+    *fp = _wfsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
+#else
+    *fp = _fsopen((filename.c_str()), mode.c_str(), _SH_DENYNO);
+#endif
+#else // unix
+    *fp = fopen((filename.c_str()), mode.c_str());
+#endif
+
+#ifdef SPDLOG_PREVENT_CHILD_FD
+    if (*fp != nullptr)
+    {
+        prevent_child_fd(*fp);
+    }
+#endif
+    return *fp == nullptr;
+}
+
+inline int remove(const filename_t &filename) SPDLOG_NOEXCEPT
+{
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+    return _wremove(filename.c_str());
+#else
+    return std::remove(filename.c_str());
+#endif
+}
+
+inline int rename(const filename_t &filename1, const filename_t &filename2) SPDLOG_NOEXCEPT
+{
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+    return _wrename(filename1.c_str(), filename2.c_str());
+#else
+    return std::rename(filename1.c_str(), filename2.c_str());
+#endif
+}
+
+// Return if file exists
+inline bool file_exists(const filename_t &filename) SPDLOG_NOEXCEPT
+{
+#ifdef _WIN32
+#ifdef SPDLOG_WCHAR_FILENAMES
+    auto attribs = GetFileAttributesW(filename.c_str());
+#else
+    auto attribs = GetFileAttributesA(filename.c_str());
+#endif
+    return (attribs != INVALID_FILE_ATTRIBUTES && !(attribs & FILE_ATTRIBUTE_DIRECTORY));
+#else // common linux/unix all have the stat system call
+    struct stat buffer;
+    return (stat(filename.c_str(), &buffer) == 0);
+#endif
+}
+
+// Return file size according to open FILE* object
+inline size_t filesize(FILE *f)
+{
+    if (f == nullptr)
+    {
+        throw spdlog_ex("Failed getting file size. fd is null");
+    }
+#if defined(_WIN32) && !defined(__CYGWIN__)
+    int fd = _fileno(f);
+#if _WIN64 // 64 bits
+    __int64 ret = _filelengthi64(fd);
+    if (ret >= 0)
+    {
+        return static_cast<size_t>(ret);
+    }
+
+#else // windows 32 bits
+    long ret = _filelength(fd);
+    if (ret >= 0)
+    {
+        return static_cast<size_t>(ret);
+    }
+#endif
+
+#else // unix
+    int fd = fileno(f);
+// 64 bits(but not in osx or cygwin, where fstat64 is deprecated)
+#if !defined(__FreeBSD__) && !defined(__APPLE__) && (defined(__x86_64__) || defined(__ppc64__)) && !defined(__CYGWIN__)
+    struct stat64 st;
+    if (fstat64(fd, &st) == 0)
+    {
+        return static_cast<size_t>(st.st_size);
+    }
+#else // unix 32 bits or cygwin
+    struct stat st;
+
+    if (fstat(fd, &st) == 0)
+    {
+        return static_cast<size_t>(st.st_size);
+    }
+#endif
+#endif
+    throw spdlog_ex("Failed getting file size from fd", errno);
+}
+
+// Return utc offset in minutes or throw spdlog_ex on failure
+inline int utc_minutes_offset(const std::tm &tm = details::os::localtime())
+{
+
+#ifdef _WIN32
+#if _WIN32_WINNT < _WIN32_WINNT_WS08
+    TIME_ZONE_INFORMATION tzinfo;
+    auto rv = GetTimeZoneInformation(&tzinfo);
+#else
+    DYNAMIC_TIME_ZONE_INFORMATION tzinfo;
+    auto rv = GetDynamicTimeZoneInformation(&tzinfo);
+#endif
+    if (rv == TIME_ZONE_ID_INVALID)
+        throw spdlog::spdlog_ex("Failed getting timezone info. ", errno);
+
+    int offset = -tzinfo.Bias;
+    if (tm.tm_isdst)
+    {
+        offset -= tzinfo.DaylightBias;
+    }
+    else
+    {
+        offset -= tzinfo.StandardBias;
+    }
+    return offset;
+#else
+
+#if defined(sun) || defined(__sun) || defined(_AIX)
+    // 'tm_gmtoff' field is BSD extension and it's missing on SunOS/Solaris
+    struct helper
+    {
+        static long int calculate_gmt_offset(const std::tm &localtm = details::os::localtime(), const std::tm &gmtm = details::os::gmtime())
+        {
+            int local_year = localtm.tm_year + (1900 - 1);
+            int gmt_year = gmtm.tm_year + (1900 - 1);
+
+            long int days = (
+                // difference in day of year
+                localtm.tm_yday -
+                gmtm.tm_yday
+
+                // + intervening leap days
+                + ((local_year >> 2) - (gmt_year >> 2)) - (local_year / 100 - gmt_year / 100) +
+                ((local_year / 100 >> 2) - (gmt_year / 100 >> 2))
+
+                // + difference in years * 365 */
+                + (long int)(local_year - gmt_year) * 365);
+
+            long int hours = (24 * days) + (localtm.tm_hour - gmtm.tm_hour);
+            long int mins = (60 * hours) + (localtm.tm_min - gmtm.tm_min);
+            long int secs = (60 * mins) + (localtm.tm_sec - gmtm.tm_sec);
+
+            return secs;
+        }
+    };
+
+    auto offset_seconds = helper::calculate_gmt_offset(tm);
+#else
+    auto offset_seconds = tm.tm_gmtoff;
+#endif
+
+    return static_cast<int>(offset_seconds / 60);
+#endif
+}
+
+// Return current thread id as size_t
+// It exists because the std::this_thread::get_id() is much slower(especially
+// under VS 2013)
+inline size_t _thread_id() SPDLOG_NOEXCEPT
+{
+#ifdef _WIN32
+    return static_cast<size_t>(::GetCurrentThreadId());
+#elif __linux__
+#if defined(__ANDROID__) && defined(__ANDROID_API__) && (__ANDROID_API__ < 21)
+#define SYS_gettid __NR_gettid
+#endif
+    return static_cast<size_t>(syscall(SYS_gettid));
+#elif __FreeBSD__
+    long tid;
+    thr_self(&tid);
+    return static_cast<size_t>(tid);
+#elif __APPLE__
+    uint64_t tid;
+    pthread_threadid_np(nullptr, &tid);
+    return static_cast<size_t>(tid);
+#else // Default to standard C++11 (other Unix)
+    return static_cast<size_t>(std::hash<std::thread::id>()(std::this_thread::get_id()));
+#endif
+}
+
+// Return current thread id as size_t (from thread local storage)
+inline size_t thread_id() SPDLOG_NOEXCEPT
+{
+#if defined(SPDLOG_NO_TLS)
+    return _thread_id();
+#else // cache thread id in tls
+    static thread_local const size_t tid = _thread_id();
+    return tid;
+#endif
+}
+
+// This is avoid msvc issue in sleep_for that happens if the clock changes.
+// See https://github.com/gabime/spdlog/issues/609
+inline void sleep_for_millis(int milliseconds) SPDLOG_NOEXCEPT
+{
+#if defined(_WIN32)
+    ::Sleep(milliseconds);
+#else
+    std::this_thread::sleep_for(std::chrono::milliseconds(milliseconds));
+#endif
+}
+
+// wchar support for windows file names (SPDLOG_WCHAR_FILENAMES must be defined)
+#if defined(_WIN32) && defined(SPDLOG_WCHAR_FILENAMES)
+#define SPDLOG_FILENAME_T(s) L##s
+inline std::string filename_to_str(const filename_t &filename)
+{
+    std::wstring_convert<std::codecvt_utf8<wchar_t>, wchar_t> c;
+    return c.to_bytes(filename);
+}
+#else
+#define SPDLOG_FILENAME_T(s) s
+inline std::string filename_to_str(const filename_t &filename)
+{
+    return filename;
+}
+#endif
+
+inline int pid()
+{
+
+#ifdef _WIN32
+    return static_cast<int>(::GetCurrentProcessId());
+#else
+    return static_cast<int>(::getpid());
+#endif
+}
+
+// Determine if the terminal supports colors
+// Source: https://github.com/agauniyal/rang/
+inline bool is_color_terminal() SPDLOG_NOEXCEPT
+{
+#ifdef _WIN32
+    return true;
+#else
+    static constexpr const char *Terms[] = {
+        "ansi", "color", "console", "cygwin", "gnome", "konsole", "kterm", "linux", "msys", "putty", "rxvt", "screen", "vt100", "xterm"};
+
+    const char *env_p = std::getenv("TERM");
+    if (env_p == nullptr)
+    {
+        return false;
+    }
+
+    static const bool result =
+        std::any_of(std::begin(Terms), std::end(Terms), [&](const char *term) { return std::strstr(env_p, term) != nullptr; });
+    return result;
+#endif
+}
+
+// Detrmine if the terminal attached
+// Source: https://github.com/agauniyal/rang/
+inline bool in_terminal(FILE *file) SPDLOG_NOEXCEPT
+{
+
+#ifdef _WIN32
+    return _isatty(_fileno(file)) != 0;
+#else
+    return isatty(fileno(file)) != 0;
+#endif
+}
+} // namespace os
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/details/periodic_worker.h

@@ -0,0 +1,71 @@
+
+//
+// Copyright(c) 2018 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+// periodic worker thread - periodically executes the given callback function.
+//
+// RAII over the owned thread:
+//    creates the thread on construction.
+//    stops and joins the thread on destruction (if the thread is executing a callback, wait for it to finish first).
+
+#include <chrono>
+#include <condition_variable>
+#include <functional>
+#include <mutex>
+#include <thread>
+namespace spdlog {
+namespace details {
+
+class periodic_worker
+{
+public:
+    periodic_worker(const std::function<void()> &callback_fun, std::chrono::seconds interval)
+    {
+        active_ = (interval > std::chrono::seconds::zero());
+        if (!active_)
+        {
+            return;
+        }
+
+        worker_thread_ = std::thread([this, callback_fun, interval]() {
+            for (;;)
+            {
+                std::unique_lock<std::mutex> lock(this->mutex_);
+                if (this->cv_.wait_for(lock, interval, [this] { return !this->active_; }))
+                {
+                    return; // active_ == false, so exit this thread
+                }
+                callback_fun();
+            }
+        });
+    }
+
+    periodic_worker(const periodic_worker &) = delete;
+    periodic_worker &operator=(const periodic_worker &) = delete;
+
+    // stop the worker thread and join it
+    ~periodic_worker()
+    {
+        if (worker_thread_.joinable())
+        {
+            {
+                std::lock_guard<std::mutex> lock(mutex_);
+                active_ = false;
+            }
+            cv_.notify_one();
+            worker_thread_.join();
+        }
+    }
+
+private:
+    bool active_;
+    std::thread worker_thread_;
+    std::mutex mutex_;
+    std::condition_variable cv_;
+};
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/details/registry.h

@@ -0,0 +1,285 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+// Loggers registy of unique name->logger pointer
+// An attempt to create a logger with an already existing name will be ignored
+// If user requests a non existing logger, nullptr will be returned
+// This class is thread safe
+
+#include "spdlog/common.h"
+#include "spdlog/details/periodic_worker.h"
+#include "spdlog/logger.h"
+
+#ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
+// support for the default stdout color logger
+#ifdef _WIN32
+#include "spdlog/sinks/wincolor_sink.h"
+#else
+#include "spdlog/sinks/ansicolor_sink.h"
+#endif
+#endif // SPDLOG_DISABLE_DEFAULT_LOGGER
+
+#include <chrono>
+#include <functional>
+#include <memory>
+#include <string>
+#include <unordered_map>
+
+namespace spdlog {
+namespace details {
+class thread_pool;
+
+class registry
+{
+public:
+    registry(const registry &) = delete;
+    registry &operator=(const registry &) = delete;
+
+    void register_logger(std::shared_ptr<logger> new_logger)
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        register_logger_(std::move(new_logger));
+    }
+
+    void initialize_logger(std::shared_ptr<logger> new_logger)
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        new_logger->set_formatter(formatter_->clone());
+
+        if (err_handler_)
+        {
+            new_logger->set_error_handler(err_handler_);
+        }
+
+        new_logger->set_level(level_);
+        new_logger->flush_on(flush_level_);
+
+        if (automatic_registration_)
+        {
+            register_logger_(std::move(new_logger));
+        }
+    }
+
+    std::shared_ptr<logger> get(const std::string &logger_name)
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        auto found = loggers_.find(logger_name);
+        return found == loggers_.end() ? nullptr : found->second;
+    }
+
+    std::shared_ptr<logger> default_logger()
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        return default_logger_;
+    }
+
+    // Return raw ptr to the default logger.
+    // To be used directly by the spdlog default api (e.g. spdlog::info)
+    // This make the default API faster, but cannot be used concurrently with set_default_logger().
+    // e.g do not call set_default_logger() from one thread while calling spdlog::info() from another.
+    logger *get_default_raw()
+    {
+        return default_logger_.get();
+    }
+
+    // set default logger.
+    // default logger is stored in default_logger_ (for faster retrieval) and in the loggers_ map.
+    void set_default_logger(std::shared_ptr<logger> new_default_logger)
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        // remove previous default logger from the map
+        if (default_logger_ != nullptr)
+        {
+            loggers_.erase(default_logger_->name());
+        }
+        if (new_default_logger != nullptr)
+        {
+            loggers_[new_default_logger->name()] = new_default_logger;
+        }
+        default_logger_ = std::move(new_default_logger);
+    }
+
+    void set_tp(std::shared_ptr<thread_pool> tp)
+    {
+        std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
+        tp_ = std::move(tp);
+    }
+
+    std::shared_ptr<thread_pool> get_tp()
+    {
+        std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
+        return tp_;
+    }
+
+    // Set global formatter. Each sink in each logger will get a clone of this object
+    void set_formatter(std::unique_ptr<formatter> formatter)
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        formatter_ = std::move(formatter);
+        for (auto &l : loggers_)
+        {
+            l.second->set_formatter(formatter_->clone());
+        }
+    }
+
+    void set_level(level::level_enum log_level)
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        for (auto &l : loggers_)
+        {
+            l.second->set_level(log_level);
+        }
+        level_ = log_level;
+    }
+
+    void flush_on(level::level_enum log_level)
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        for (auto &l : loggers_)
+        {
+            l.second->flush_on(log_level);
+        }
+        flush_level_ = log_level;
+    }
+
+    void flush_every(std::chrono::seconds interval)
+    {
+        std::lock_guard<std::mutex> lock(flusher_mutex_);
+        std::function<void()> clbk = std::bind(&registry::flush_all, this);
+        periodic_flusher_ = details::make_unique<periodic_worker>(clbk, interval);
+    }
+
+    void set_error_handler(log_err_handler handler)
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        for (auto &l : loggers_)
+        {
+            l.second->set_error_handler(handler);
+        }
+        err_handler_ = handler;
+    }
+
+    void apply_all(const std::function<void(const std::shared_ptr<logger>)> &fun)
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        for (auto &l : loggers_)
+        {
+            fun(l.second);
+        }
+    }
+
+    void flush_all()
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        for (auto &l : loggers_)
+        {
+            l.second->flush();
+        }
+    }
+
+    void drop(const std::string &logger_name)
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        loggers_.erase(logger_name);
+        if (default_logger_ && default_logger_->name() == logger_name)
+        {
+            default_logger_.reset();
+        }
+    }
+
+    void drop_all()
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        loggers_.clear();
+        default_logger_.reset();
+    }
+
+    // clean all resources and threads started by the registry
+    void shutdown()
+    {
+        {
+            std::lock_guard<std::mutex> lock(flusher_mutex_);
+            periodic_flusher_.reset();
+        }
+
+        drop_all();
+
+        {
+            std::lock_guard<std::recursive_mutex> lock(tp_mutex_);
+            tp_.reset();
+        }
+    }
+
+    std::recursive_mutex &tp_mutex()
+    {
+        return tp_mutex_;
+    }
+
+    void set_automatic_registration(bool automatic_regsistration)
+    {
+        std::lock_guard<std::mutex> lock(logger_map_mutex_);
+        automatic_registration_ = automatic_regsistration;
+    }
+
+    static registry &instance()
+    {
+        static registry s_instance;
+        return s_instance;
+    }
+
+private:
+    registry()
+        : formatter_(new pattern_formatter())
+    {
+
+#ifndef SPDLOG_DISABLE_DEFAULT_LOGGER
+        // create default logger (ansicolor_stdout_sink_mt or wincolor_stdout_sink_mt in windows).
+#ifdef _WIN32
+        auto color_sink = std::make_shared<sinks::wincolor_stdout_sink_mt>();
+#else
+        auto color_sink = std::make_shared<sinks::ansicolor_stdout_sink_mt>();
+#endif
+
+        const char *default_logger_name = "";
+        default_logger_ = std::make_shared<spdlog::logger>(default_logger_name, std::move(color_sink));
+        loggers_[default_logger_name] = default_logger_;
+
+#endif // SPDLOG_DISABLE_DEFAULT_LOGGER
+    }
+
+    ~registry() = default;
+
+    void throw_if_exists_(const std::string &logger_name)
+    {
+        if (loggers_.find(logger_name) != loggers_.end())
+        {
+            throw spdlog_ex("logger with name '" + logger_name + "' already exists");
+        }
+    }
+
+    void register_logger_(std::shared_ptr<logger> new_logger)
+    {
+        auto logger_name = new_logger->name();
+        throw_if_exists_(logger_name);
+        loggers_[logger_name] = std::move(new_logger);
+    }
+
+    std::mutex logger_map_mutex_, flusher_mutex_;
+    std::recursive_mutex tp_mutex_;
+    std::unordered_map<std::string, std::shared_ptr<logger>> loggers_;
+    std::unique_ptr<formatter> formatter_;
+    level::level_enum level_ = spdlog::logger::default_level();
+    level::level_enum flush_level_ = level::off;
+    log_err_handler err_handler_;
+    std::shared_ptr<thread_pool> tp_;
+    std::unique_ptr<periodic_worker> periodic_flusher_;
+    std::shared_ptr<logger> default_logger_;
+    bool automatic_registration_ = true;
+};
+
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/details/thread_pool.h

@@ -0,0 +1,238 @@
+#pragma once
+
+#include "spdlog/details/fmt_helper.h"
+#include "spdlog/details/log_msg.h"
+#include "spdlog/details/mpmc_blocking_q.h"
+#include "spdlog/details/os.h"
+
+#include <chrono>
+#include <memory>
+#include <thread>
+#include <vector>
+
+namespace spdlog {
+namespace details {
+
+using async_logger_ptr = std::shared_ptr<spdlog::async_logger>;
+
+enum class async_msg_type
+{
+    log,
+    flush,
+    terminate
+};
+
+// Async msg to move to/from the queue
+// Movable only. should never be copied
+struct async_msg
+{
+    async_msg_type msg_type;
+    level::level_enum level;
+    log_clock::time_point time;
+    size_t thread_id;
+    fmt::basic_memory_buffer<char, 176> raw;
+
+    size_t msg_id;
+    source_loc source;
+    async_logger_ptr worker_ptr;
+
+    async_msg() = default;
+    ~async_msg() = default;
+
+    // should only be moved in or out of the queue..
+    async_msg(const async_msg &) = delete;
+
+// support for vs2013 move
+#if defined(_MSC_VER) && _MSC_VER <= 1800
+    async_msg(async_msg &&other) SPDLOG_NOEXCEPT : msg_type(other.msg_type),
+                                                   level(other.level),
+                                                   time(other.time),
+                                                   thread_id(other.thread_id),
+                                                   raw(move(other.raw)),
+                                                   msg_id(other.msg_id),
+                                                   source(other.source),
+                                                   worker_ptr(std::move(other.worker_ptr))
+    {
+    }
+
+    async_msg &operator=(async_msg &&other) SPDLOG_NOEXCEPT
+    {
+        msg_type = other.msg_type;
+        level = other.level;
+        time = other.time;
+        thread_id = other.thread_id;
+        raw = std::move(other.raw);
+        msg_id = other.msg_id;
+        source = other.source;
+        worker_ptr = std::move(other.worker_ptr);
+        return *this;
+    }
+#else // (_MSC_VER) && _MSC_VER <= 1800
+    async_msg(async_msg &&) = default;
+    async_msg &operator=(async_msg &&) = default;
+#endif
+
+    // construct from log_msg with given type
+    async_msg(async_logger_ptr &&worker, async_msg_type the_type, details::log_msg &m)
+        : msg_type(the_type)
+        , level(m.level)
+        , time(m.time)
+        , thread_id(m.thread_id)
+        , msg_id(m.msg_id)
+        , source(m.source)
+        , worker_ptr(std::move(worker))
+    {
+        fmt_helper::append_string_view(m.payload, raw);
+    }
+
+    async_msg(async_logger_ptr &&worker, async_msg_type the_type)
+        : msg_type(the_type)
+        , level(level::off)
+        , time()
+        , thread_id(0)
+        , msg_id(0)
+        , source()
+        , worker_ptr(std::move(worker))
+    {
+    }
+
+    explicit async_msg(async_msg_type the_type)
+        : async_msg(nullptr, the_type)
+    {
+    }
+
+    // copy into log_msg
+    log_msg to_log_msg()
+    {
+        log_msg msg(&worker_ptr->name(), level, string_view_t(raw.data(), raw.size()));
+        msg.time = time;
+        msg.thread_id = thread_id;
+        msg.msg_id = msg_id;
+        msg.source = source;
+        msg.color_range_start = 0;
+        msg.color_range_end = 0;
+        return msg;
+    }
+};
+
+class thread_pool
+{
+public:
+    using item_type = async_msg;
+    using q_type = details::mpmc_blocking_queue<item_type>;
+
+    thread_pool(size_t q_max_items, size_t threads_n)
+        : q_(q_max_items)
+    {
+        // std::cout << "thread_pool()  q_size_bytes: " << q_size_bytes <<
+        // "\tthreads_n: " << threads_n << std::endl;
+        if (threads_n == 0 || threads_n > 1000)
+        {
+            throw spdlog_ex("spdlog::thread_pool(): invalid threads_n param (valid "
+                            "range is 1-1000)");
+        }
+        for (size_t i = 0; i < threads_n; i++)
+        {
+            threads_.emplace_back(&thread_pool::worker_loop_, this);
+        }
+    }
+
+    // message all threads to terminate gracefully join them
+    ~thread_pool()
+    {
+        try
+        {
+            for (size_t i = 0; i < threads_.size(); i++)
+            {
+                post_async_msg_(async_msg(async_msg_type::terminate), async_overflow_policy::block);
+            }
+
+            for (auto &t : threads_)
+            {
+                t.join();
+            }
+        }
+        catch (...)
+        {
+        }
+    }
+
+    thread_pool(const thread_pool &) = delete;
+    thread_pool &operator=(thread_pool &&) = delete;
+
+    void post_log(async_logger_ptr &&worker_ptr, details::log_msg &msg, async_overflow_policy overflow_policy)
+    {
+        async_msg async_m(std::move(worker_ptr), async_msg_type::log, msg);
+        post_async_msg_(std::move(async_m), overflow_policy);
+    }
+
+    void post_flush(async_logger_ptr &&worker_ptr, async_overflow_policy overflow_policy)
+    {
+        post_async_msg_(async_msg(std::move(worker_ptr), async_msg_type::flush), overflow_policy);
+    }
+
+    size_t overrun_counter()
+    {
+        return q_.overrun_counter();
+    }
+
+private:
+    q_type q_;
+
+    std::vector<std::thread> threads_;
+
+    void post_async_msg_(async_msg &&new_msg, async_overflow_policy overflow_policy)
+    {
+        if (overflow_policy == async_overflow_policy::block)
+        {
+            q_.enqueue(std::move(new_msg));
+        }
+        else
+        {
+            q_.enqueue_nowait(std::move(new_msg));
+        }
+    }
+
+    void worker_loop_()
+    {
+        while (process_next_msg_()) {};
+    }
+
+    // process next message in the queue
+    // return true if this thread should still be active (while no terminate msg
+    // was received)
+    bool process_next_msg_()
+    {
+        async_msg incoming_async_msg;
+        bool dequeued = q_.dequeue_for(incoming_async_msg, std::chrono::seconds(10));
+        if (!dequeued)
+        {
+            return true;
+        }
+
+        switch (incoming_async_msg.msg_type)
+        {
+        case async_msg_type::log:
+        {
+            auto msg = incoming_async_msg.to_log_msg();
+            incoming_async_msg.worker_ptr->backend_log_(msg);
+            return true;
+        }
+        case async_msg_type::flush:
+        {
+            incoming_async_msg.worker_ptr->backend_flush_();
+            return true;
+        }
+
+        case async_msg_type::terminate:
+        {
+            return false;
+        }
+        }
+        assert(false && "Unexpected async_msg_type");
+        return true;
+    }
+};
+
+} // namespace details
+} // namespace spdlog

third_party/spdlog/include/spdlog/fmt/bin_to_hex.h

@@ -0,0 +1,172 @@
+//
+// Copyright(c) 2015 Gabi Melman.
+// Distributed under the MIT License (http://opensource.org/licenses/MIT)
+//
+
+#pragma once
+
+//
+// Support for logging binary data as hex
+// format flags:
+// {:X} - print in uppercase.
+// {:s} - don't separate each byte with space.
+// {:p} - don't print the position on each line start.
+// {:n} - don't split the output to lines.
+
+//
+// Examples:
+//
+// std::vector<char> v(200, 0x0b);
+// logger->info("Some buffer {}", spdlog::to_hex(v));
+// char buf[128];
+// logger->info("Some buffer {:X}", spdlog::to_hex(std::begin(buf), std::end(buf)));
+
+namespace spdlog {
+namespace details {
+
+template<typename It>
+class bytes_range
+{
+public:
+    bytes_range(It range_begin, It range_end)
+        : begin_(range_begin)
+        , end_(range_end)
+    {
+    }
+
+    It begin() const
+    {
+        return begin_;
+    }
+    It end() const
+    {
+        return end_;
+    }
+
+private:
+    It begin_, end_;
+};
+} // namespace details
+
+// create a bytes_range that wraps the given container
+template<typename Container>
+inline details::bytes_range<typename Container::const_iterator> to_hex(const Container &container)
+{
+    static_assert(sizeof(typename Container::value_type) == 1, "sizeof(Container::value_type) != 1");
+    using Iter = typename Container::const_iterator;
+    return details::bytes_range<Iter>(std::begin(container), std::end(container));
+}
+
+// create bytes_range from ranges
+template<typename It>
+inline details::bytes_range<It> to_hex(const It range_begin, const It range_end)
+{
+    return details::bytes_range<It>(range_begin, range_end);
+}
+
+} // namespace spdlog
+
+namespace fmt {
+
+template<typename T>
+struct formatter<spdlog::details::bytes_range<T>>
+{
+    const std::size_t line_size = 100;
+    const char delimiter = ' ';
+
+    bool put_newlines = true;
+    bool put_delimiters = true;
+    bool use_uppercase = false;
+    bool put_positions = true; // position on start of each line
+
+    // parse the format string flags
+    template<typename ParseContext>
+    auto parse(ParseContext &ctx) -> decltype(ctx.begin())
+    {
+        auto it = ctx.begin();
+        while (*it && *it != '}')
+        {
+            switch (*it)
+            {
+            case 'X':
+                use_uppercase = true;
+                break;
+            case 's':
+                put_delimiters = false;
+                break;
+            case 'p':
+                put_positions = false;
+                break;
+            case 'n':
+                put_newlines = false;
+                break;
+            }
+
+            ++it;
+        }
+        return it;
+    }
+
+    // format the given bytes range as hex
+    template<typename FormatContext, typename Container>
+    auto format(const spdlog::details::bytes_range<Container> &the_range, FormatContext &ctx) -> decltype(ctx.out())
+    {
+        SPDLOG_CONSTEXPR const char *hex_upper = "0123456789ABCDEF";
+        SPDLOG_CONSTEXPR const char *hex_lower = "0123456789abcdef";
+        const char *hex_chars = use_uppercase ? hex_upper : hex_lower;
+
+        std::size_t pos = 0;
+        std::size_t column = line_size;
+        auto inserter = ctx.begin();
+
+        for (auto &item : the_range)
+        {
+            auto ch = static_cast<unsigned char>(item);
+            pos++;
+
+            if (put_newlines && column >= line_size)
+            {
+                column = put_newline(inserter, pos);
+
+                // put first byte without delimiter in front of it
+                *inserter++ = hex_chars[(ch >> 4) & 0x0f];
+                *inserter++ = hex_chars[ch & 0x0f];
+                column += 2;
+                continue;
+            }
+
+            if (put_delimiters)
+            {
+                *inserter++ = delimiter;
+                ++column;
+            }
+
+            *inserter++ = hex_chars[(ch >> 4) & 0x0f];
+            *inserter++ = hex_chars[ch & 0x0f];
+            column += 2;
+        }
+        return inserter;
+    }
+
+    // put newline(and position header)
+    // return the next column
+    template<typename It>
+    std::size_t put_newline(It inserter, std::size_t pos)
+    {
+#ifdef _WIN32
+        *inserter++ = '\r';
+#endif
+        *inserter++ = '\n';
+
+        if (put_positions)
+        {
+            fmt::format_to(inserter, "{:<04X}: ", pos - 1);
+            return 7;
+        }
+        else
+        {
+            return 1;
+        }
+    }
+};
+} // namespace fmt

third_party/spdlog/include/spdlog/fmt/bundled/LICENSE.rst

@@ -0,0 +1,23 @@
+Copyright (c) 2012 - 2016, Victor Zverovich
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+1. Redistributions of source code must retain the above copyright notice, this
+   list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above copyright notice,
+   this list of conditions and the following disclaimer in the documentation
+   and/or other materials provided with the distribution.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

third_party/spdlog/include/spdlog/fmt/bundled/chrono.h

@@ -0,0 +1,452 @@
+// Formatting library for C++ - chrono support
+//
+// Copyright (c) 2012 - present, Victor Zverovich
+// All rights reserved.
+//
+// For the license information refer to format.h.
+
+#ifndef FMT_CHRONO_H_
+#define FMT_CHRONO_H_
+
+#include "format.h"
+#include "locale.h"
+
+#include <chrono>
+#include <ctime>
+#include <locale>
+#include <sstream>
+
+FMT_BEGIN_NAMESPACE
+
+namespace internal{
+
+enum class numeric_system {
+  standard,
+  // Alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale.
+  alternative
+};
+
+// Parses a put_time-like format string and invokes handler actions.
+template <typename Char, typename Handler>
+FMT_CONSTEXPR const Char *parse_chrono_format(
+    const Char *begin, const Char *end, Handler &&handler) {
+  auto ptr = begin;
+  while (ptr != end) {
+    auto c = *ptr;
+    if (c == '}') break;
+    if (c != '%') {
+      ++ptr;
+      continue;
+    }
+    if (begin != ptr)
+      handler.on_text(begin, ptr);
+    ++ptr; // consume '%'
+    if (ptr == end)
+      throw format_error("invalid format");
+    c = *ptr++;
+    switch (c) {
+    case '%':
+      handler.on_text(ptr - 1, ptr);
+      break;
+    case 'n': {
+      const char newline[] = "\n";
+      handler.on_text(newline, newline + 1);
+      break;
+    }
+    case 't': {
+      const char tab[] = "\t";
+      handler.on_text(tab, tab + 1);
+      break;
+    }
+    // Day of the week:
+    case 'a':
+      handler.on_abbr_weekday();
+      break;
+    case 'A':
+      handler.on_full_weekday();
+      break;
+    case 'w':
+      handler.on_dec0_weekday(numeric_system::standard);
+      break;
+    case 'u':
+      handler.on_dec1_weekday(numeric_system::standard);
+      break;
+    // Month:
+    case 'b':
+      handler.on_abbr_month();
+      break;
+    case 'B':
+      handler.on_full_month();
+      break;
+    // Hour, minute, second:
+    case 'H':
+      handler.on_24_hour(numeric_system::standard);
+      break;
+    case 'I':
+      handler.on_12_hour(numeric_system::standard);
+      break;
+    case 'M':
+      handler.on_minute(numeric_system::standard);
+      break;
+    case 'S':
+      handler.on_second(numeric_system::standard);
+      break;
+    // Other:
+    case 'c':
+      handler.on_datetime(numeric_system::standard);
+      break;
+    case 'x':
+      handler.on_loc_date(numeric_system::standard);
+      break;
+    case 'X':
+      handler.on_loc_time(numeric_system::standard);
+      break;
+    case 'D':
+      handler.on_us_date();
+      break;
+    case 'F':
+      handler.on_iso_date();
+      break;
+    case 'r':
+      handler.on_12_hour_time();
+      break;
+    case 'R':
+      handler.on_24_hour_time();
+      break;
+    case 'T':
+      handler.on_iso_time();
+      break;
+    case 'p':
+      handler.on_am_pm();
+      break;
+    case 'z':
+      handler.on_utc_offset();
+      break;
+    case 'Z':
+      handler.on_tz_name();
+      break;
+    // Alternative representation:
+    case 'E': {
+      if (ptr == end)
+        throw format_error("invalid format");
+      c = *ptr++;
+      switch (c) {
+      case 'c':
+        handler.on_datetime(numeric_system::alternative);
+        break;
+      case 'x':
+        handler.on_loc_date(numeric_system::alternative);
+        break;
+      case 'X':
+        handler.on_loc_time(numeric_system::alternative);
+        break;
+      default:
+        throw format_error("invalid format");
+      }
+      break;
+    }
+    case 'O':
+      if (ptr == end)
+        throw format_error("invalid format");
+      c = *ptr++;
+      switch (c) {
+      case 'w':
+        handler.on_dec0_weekday(numeric_system::alternative);
+        break;
+      case 'u':
+        handler.on_dec1_weekday(numeric_system::alternative);
+        break;
+      case 'H':
+        handler.on_24_hour(numeric_system::alternative);
+        break;
+      case 'I':
+        handler.on_12_hour(numeric_system::alternative);
+        break;
+      case 'M':
+        handler.on_minute(numeric_system::alternative);
+        break;
+      case 'S':
+        handler.on_second(numeric_system::alternative);
+        break;
+      default:
+        throw format_error("invalid format");
+      }
+      break;
+    default:
+      throw format_error("invalid format");
+    }
+    begin = ptr;
+  }
+  if (begin != ptr)
+    handler.on_text(begin, ptr);
+  return ptr;
+}
+
+struct chrono_format_checker {
+  void report_no_date() { throw format_error("no date"); }
+
+  template <typename Char>
+  void on_text(const Char *, const Char *) {}
+  void on_abbr_weekday() { report_no_date(); }
+  void on_full_weekday() { report_no_date(); }
+  void on_dec0_weekday(numeric_system) { report_no_date(); }
+  void on_dec1_weekday(numeric_system) { report_no_date(); }
+  void on_abbr_month() { report_no_date(); }
+  void on_full_month() { report_no_date(); }
+  void on_24_hour(numeric_system) {}
+  void on_12_hour(numeric_system) {}
+  void on_minute(numeric_system) {}
+  void on_second(numeric_system) {}
+  void on_datetime(numeric_system) { report_no_date(); }
+  void on_loc_date(numeric_system) { report_no_date(); }
+  void on_loc_time(numeric_system) { report_no_date(); }
+  void on_us_date() { report_no_date(); }
+  void on_iso_date() { report_no_date(); }
+  void on_12_hour_time() {}
+  void on_24_hour_time() {}
+  void on_iso_time() {}
+  void on_am_pm() {}
+  void on_utc_offset() { report_no_date(); }
+  void on_tz_name() { report_no_date(); }
+};
+
+template <typename Int>
+inline int to_int(Int value) {
+  FMT_ASSERT(value >= (std::numeric_limits<int>::min)() &&
+             value <= (std::numeric_limits<int>::max)(), "invalid value");
+  return static_cast<int>(value);
+}
+
+template <typename FormatContext, typename OutputIt>
+struct chrono_formatter {
+  FormatContext &context;
+  OutputIt out;
+  std::chrono::seconds s;
+  std::chrono::milliseconds ms;
+
+  typedef typename FormatContext::char_type char_type;
+
+  explicit chrono_formatter(FormatContext &ctx, OutputIt o)
+    : context(ctx), out(o) {}
+
+  int hour() const { return to_int((s.count() / 3600) % 24); }
+
+  int hour12() const {
+    auto hour = to_int((s.count() / 3600) % 12);
+    return hour > 0 ? hour : 12;
+  }
+
+  int minute() const { return to_int((s.count() / 60) % 60); }
+  int second() const { return to_int(s.count() % 60); }
+
+  std::tm time() const {
+    auto time = std::tm();
+    time.tm_hour = hour();
+    time.tm_min = minute();
+    time.tm_sec = second();
+    return time;
+  }
+
+  void write(int value, int width) {
+    typedef typename int_traits<int>::main_type main_type;
+    main_type n = to_unsigned(value);
+    int num_digits = internal::count_digits(n);
+    if (width > num_digits)
+      out = std::fill_n(out, width - num_digits, '0');
+    out = format_decimal<char_type>(out, n, num_digits);
+  }
+
+  void format_localized(const tm &time, const char *format) {
+    auto locale = context.locale().template get<std::locale>();
+    auto &facet = std::use_facet<std::time_put<char_type>>(locale);
+    std::basic_ostringstream<char_type> os;
+    os.imbue(locale);
+    facet.put(os, os, ' ', &time, format, format + std::strlen(format));
+    auto str = os.str();
+    std::copy(str.begin(), str.end(), out);
+  }
+
+  void on_text(const char_type *begin, const char_type *end) {
+    std::copy(begin, end, out);
+  }
+
+  // These are not implemented because durations don't have date information.
+  void on_abbr_weekday() {}
+  void on_full_weekday() {}
+  void on_dec0_weekday(numeric_system) {}
+  void on_dec1_weekday(numeric_system) {}
+  void on_abbr_month() {}
+  void on_full_month() {}
+  void on_datetime(numeric_system) {}
+  void on_loc_date(numeric_system) {}
+  void on_loc_time(numeric_system) {}
+  void on_us_date() {}
+  void on_iso_date() {}
+  void on_utc_offset() {}
+  void on_tz_name() {}
+
+  void on_24_hour(numeric_system ns) {
+    if (ns == numeric_system::standard)
+      return write(hour(), 2);
+    auto time = tm();
+    time.tm_hour = hour();
+    format_localized(time, "%OH");
+  }
+
+  void on_12_hour(numeric_system ns) {
+    if (ns == numeric_system::standard)
+      return write(hour12(), 2);
+    auto time = tm();
+    time.tm_hour = hour();
+    format_localized(time, "%OI");
+  }
+
+  void on_minute(numeric_system ns) {
+    if (ns == numeric_system::standard)
+      return write(minute(), 2);
+    auto time = tm();
+    time.tm_min = minute();
+    format_localized(time, "%OM");
+  }
+
+  void on_second(numeric_system ns) {
+    if (ns == numeric_system::standard) {
+      write(second(), 2);
+      if (ms != std::chrono::milliseconds(0)) {
+        *out++ = '.';
+        write(to_int(ms.count()), 3);
+      }
+      return;
+    }
+    auto time = tm();
+    time.tm_sec = second();
+    format_localized(time, "%OS");
+  }
+
+  void on_12_hour_time() { format_localized(time(), "%r"); }
+
+  void on_24_hour_time() {
+    write(hour(), 2);
+    *out++ = ':';
+    write(minute(), 2);
+  }
+
+  void on_iso_time() {
+    on_24_hour_time();
+    *out++ = ':';
+    write(second(), 2);
+  }
+
+  void on_am_pm() { format_localized(time(), "%p"); }
+};
+}  // namespace internal
+
+template <typename Period> FMT_CONSTEXPR const char *get_units() {
+  return FMT_NULL;
+}
+template <> FMT_CONSTEXPR const char *get_units<std::atto>() { return "as"; }
+template <> FMT_CONSTEXPR const char *get_units<std::femto>() { return "fs"; }
+template <> FMT_CONSTEXPR const char *get_units<std::pico>() { return "ps"; }
+template <> FMT_CONSTEXPR const char *get_units<std::nano>() { return "ns"; }
+template <> FMT_CONSTEXPR const char *get_units<std::micro>() { return "µs"; }
+template <> FMT_CONSTEXPR const char *get_units<std::milli>() { return "ms"; }
+template <> FMT_CONSTEXPR const char *get_units<std::centi>() { return "cs"; }
+template <> FMT_CONSTEXPR const char *get_units<std::deci>() { return "ds"; }
+template <> FMT_CONSTEXPR const char *get_units<std::ratio<1>>() { return "s"; }
+template <> FMT_CONSTEXPR const char *get_units<std::deca>() { return "das"; }
+template <> FMT_CONSTEXPR const char *get_units<std::hecto>() { return "hs"; }
+template <> FMT_CONSTEXPR const char *get_units<std::kilo>() { return "ks"; }
+template <> FMT_CONSTEXPR const char *get_units<std::mega>() { return "Ms"; }
+template <> FMT_CONSTEXPR const char *get_units<std::giga>() { return "Gs"; }
+template <> FMT_CONSTEXPR const char *get_units<std::tera>() { return "Ts"; }
+template <> FMT_CONSTEXPR const char *get_units<std::peta>() { return "Ps"; }
+template <> FMT_CONSTEXPR const char *get_units<std::exa>() { return "Es"; }
+template <> FMT_CONSTEXPR const char *get_units<std::ratio<60>>() {
+  return "m";
+}
+template <> FMT_CONSTEXPR const char *get_units<std::ratio<3600>>() {
+  return "h";
+}
+
+template <typename Rep, typename Period, typename Char>
+struct formatter<std::chrono::duration<Rep, Period>, Char> {
+ private:
+  align_spec spec;
+  internal::arg_ref<Char> width_ref;
+  mutable basic_string_view<Char> format_str;
+  typedef std::chrono::duration<Rep, Period> duration;
+
+  struct spec_handler {
+    formatter &f;
+    basic_parse_context<Char> &context;
+
+    typedef internal::arg_ref<Char> arg_ref_type;
+
+    template <typename Id>
+    FMT_CONSTEXPR arg_ref_type make_arg_ref(Id arg_id) {
+      context.check_arg_id(arg_id);
+      return arg_ref_type(arg_id);
+    }
+
+    FMT_CONSTEXPR arg_ref_type make_arg_ref(internal::auto_id) {
+      return arg_ref_type(context.next_arg_id());
+    }
+
+    void on_error(const char *msg) { throw format_error(msg); }
+    void on_fill(Char fill) { f.spec.fill_ = fill; }
+    void on_align(alignment align) { f.spec.align_ = align; }
+    void on_width(unsigned width) { f.spec.width_ = width; }
+
+    template <typename Id>
+    void on_dynamic_width(Id arg_id) {
+      f.width_ref = make_arg_ref(arg_id);
+    }
+  };
+
+ public:
+  formatter() : spec() {}
+
+  FMT_CONSTEXPR auto parse(basic_parse_context<Char> &ctx)
+      -> decltype(ctx.begin()) {
+    auto begin = ctx.begin(), end = ctx.end();
+    if (begin == end) return begin;
+    spec_handler handler{*this, ctx};
+    begin = internal::parse_align(begin, end, handler);
+    if (begin == end) return begin;
+    begin = internal::parse_width(begin, end, handler);
+    end = parse_chrono_format(begin, end, internal::chrono_format_checker());
+    format_str = basic_string_view<Char>(&*begin, internal::to_unsigned(end - begin));
+    return end;
+  }
+
+  template <typename FormatContext>
+  auto format(const duration &d, FormatContext &ctx)
+      -> decltype(ctx.out()) {
+    auto begin = format_str.begin(), end = format_str.end();
+    memory_buffer buf;
+    typedef output_range<decltype(ctx.out()), Char> range;
+    basic_writer<range> w(range(ctx.out()));
+    if (begin == end || *begin == '}') {
+      if (const char *unit = get_units<Period>())
+        format_to(buf, "{}{}", d.count(), unit);
+      else if (Period::den == 1)
+        format_to(buf, "{}[{}]s", d.count(), Period::num);
+      else
+        format_to(buf, "{}[{}/{}]s", d.count(), Period::num, Period::den);
+      internal::handle_dynamic_spec<internal::width_checker>(
+        spec.width_, width_ref, ctx);
+    } else {
+      auto out = std::back_inserter(buf);
+      internal::chrono_formatter<FormatContext, decltype(out)> f(ctx, out);
+      f.s = std::chrono::duration_cast<std::chrono::seconds>(d);
+      f.ms = std::chrono::duration_cast<std::chrono::milliseconds>(d - f.s);
+      parse_chrono_format(begin, end, f);
+    }
+    w.write(buf.data(), buf.size(), spec);
+    return w.out();
+  }
+};
+
+FMT_END_NAMESPACE
+
+#endif  // FMT_CHRONO_H_