Implement async dispatcher #221

src/framework/core/application.cpp

@@ -27,6 +27,7 @@
 #include <framework/core/modulemanager.h>
 #include <framework/core/eventdispatcher.h>
 #include <framework/core/configmanager.h>
+#include "asyncdispatcher.h"
 #include <framework/luaengine/luainterface.h>
 #include <framework/platform/crashhandler.h>
 #include <framework/platform/platform.h>
@@ -76,6 +77,8 @@ void Application::init(std::vector<std::string>& args)
     // process args encoding
     g_platform.processArgs(args);
 
+    g_asyncDispatcher.init();
+
     std::string startupOptions;
     for(uint i=1;i<args.size();++i) {
         const std::string& arg = args[i];
@@ -109,6 +112,8 @@ void Application::deinit()
     // poll remaining events
     poll();
 
+    g_asyncDispatcher.terminate();
+
     // disable dispatcher events
     g_dispatcher.shutdown();
 }

src/framework/core/asyncdispatcher.cpp

@@ -0,0 +1,71 @@
+/*
+ * Copyright (c) 2010-2013 OTClient <https://github.com/edubart/otclient>
+ *
+ * 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.
+ */
+
+#include "asyncdispatcher.h"
+
+AsyncDispatcher g_asyncDispatcher;
+
+void AsyncDispatcher::init()
+{
+    spawn_thread();
+}
+
+void AsyncDispatcher::terminate()
+{
+    stop();
+    m_tasks.clear();
+}
+
+void AsyncDispatcher::spawn_thread()
+{
+    m_running = true;
+    m_threads.push_back(std::thread(std::bind(&AsyncDispatcher::exec_loop, this)));
+}
+
+void AsyncDispatcher::stop()
+{
+    m_mutex.lock();
+    m_running = false;
+    m_condition.notify_all();
+    m_mutex.unlock();
+    for(std::thread& thread : m_threads)
+        thread.join();
+    m_threads.clear();
+};
+
+void AsyncDispatcher::exec_loop() {
+    std::unique_lock<std::mutex> lock(m_mutex);
+    while(true) {
+        while(m_tasks.size() == 0 && m_running)
+            m_condition.wait(lock);
+
+        if(!m_running)
+            return;
+
+        std::function<void()> task = m_tasks.front();
+        m_tasks.pop_front();
+
+        lock.unlock();
+        task();
+        lock.lock();
+    }
+}

src/framework/core/asyncdispatcher.h

@@ -0,0 +1,59 @@
+/*
+ * Copyright (c) 2010-2013 OTClient <https://github.com/edubart/otclient>
+ *
+ * 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.
+ */
+
+#ifndef ASYNCDISPATCHER_H
+#define ASYNCDISPATCHER_H
+
+#include "declarations.h"
+#include <framework/stdext/thread.h>
+
+class AsyncDispatcher {
+public:
+    void init();
+    void terminate();
+
+    void spawn_thread();
+    void stop();
+
+    template<class F>
+    std::future<typename std::result_of<F()>::type> schedule(const F& task) {
+        std::lock_guard<std::mutex> lock(m_mutex);
+        auto prom = std::make_shared<std::promise<typename std::result_of<F()>::type>>();
+        m_tasks.push_back([=]() { prom->set_value(task()); });
+        m_condition.notify_all();
+        return prom->get_future();
+    }
+
+protected:
+    void exec_loop();
+
+private:
+    std::list<std::function<void()>> m_tasks;
+    std::mutex m_mutex;
+    std::list<std::thread> m_threads;
+    std::condition_variable m_condition;
+    stdext::boolean<false> m_running;
+};
+
+extern AsyncDispatcher g_asyncDispatcher;
+
+#endif

src/framework/core/logger.cpp

@@ -35,6 +35,8 @@ Logger g_logger;
 
 void Logger::log(Fw::LogLevel level, const std::string& message)
 {
+    std::lock_guard<std::recursive_mutex> lock(m_mutex);
+
 #ifdef NDEBUG
     if(level == Fw::LogDebug)
         return;
@@ -95,6 +97,8 @@ void Logger::log(Fw::LogLevel level, const std::string& message)
 
 void Logger::logFunc(Fw::LogLevel level, const std::string& message, std::string prettyFunction)
 {
+    std::lock_guard<std::recursive_mutex> lock(m_mutex);
+
     prettyFunction = prettyFunction.substr(0, prettyFunction.find_first_of('('));
     if(prettyFunction.find_last_of(' ') != std::string::npos)
         prettyFunction = prettyFunction.substr(prettyFunction.find_last_of(' ') + 1);
@@ -114,6 +118,8 @@ void Logger::logFunc(Fw::LogLevel level, const std::string& message, std::string
 
 void Logger::fireOldMessages()
 {
+    std::lock_guard<std::recursive_mutex> lock(m_mutex);
+
     if(m_onLog) {
         auto backup = m_logMessages;
         for(const LogMessage& logMessage : backup) {
@@ -124,6 +130,8 @@ void Logger::fireOldMessages()
 
 void Logger::setLogFile(const std::string& file)
 {
+    std::lock_guard<std::recursive_mutex> lock(m_mutex);
+
     m_outFile.open(stdext::utf8_to_latin1(file.c_str()).c_str(), std::ios::out | std::ios::app);
     if(!m_outFile.is_open() || !m_outFile.good()) {
         g_logger.error(stdext::format("Unable to save log to '%s'", file));

src/framework/core/logger.h

@@ -25,6 +25,7 @@
 
 #include "../global.h"
 
+#include <framework/stdext/thread.h>
 #include <fstream>
 
 struct LogMessage {
@@ -61,6 +62,7 @@ private:
     std::list<LogMessage> m_logMessages;
     OnLogCallback m_onLog;
     std::ofstream m_outFile;
+    std::recursive_mutex m_mutex;
 };
 
 extern Logger g_logger;