diff src/logger.hpp @ 0:add35537fdbb tip

Initial import

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/logger.hpp	Thu Aug 25 11:05:55 2011 +0100
@@ -0,0 +1,63 @@
+//  Copyright 2011, Ian Hobson.
+//
+//  This file is part of gpsynth.
+//
+//  gpsynth is free software: you can redistribute it and/or modify
+//  it under the terms of the GNU General Public License as published by
+//  the Free Software Foundation, either version 3 of the License, or
+//  (at your option) any later version.
+//
+//  gpsynth is distributed in the hope that it will be useful,
+//  but WITHOUT ANY WARRANTY; without even the implied warranty of
+//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+//  GNU General Public License for more details.
+//
+//  You should have received a copy of the GNU General Public License
+//  along with gpsynth in the file COPYING. 
+//  If not, see http://www.gnu.org/licenses/.
+
+// Simple threadsafe logger class
+
+#pragma once
+
+#include "boost/shared_ptr.hpp"
+#include "boost/thread.hpp"
+
+#include <iostream>
+#include <queue>
+#include <string>
+
+namespace logger {
+
+class Logger {
+  std::ostream& output_stream_;
+  std::queue<std::string> log_queue_;
+  boost::mutex queue_mutex_;
+  boost::shared_ptr<boost::thread> logging_thread_;
+  boost::condition_variable queue_condition_;
+  bool quit_thread_;
+  
+public:
+  Logger();
+  ~Logger();
+  void LogMessage(const std::string& message);
+  void Flush();
+  
+  static Logger& Singleton() {
+    static Logger singleton;
+    return singleton;
+  }
+
+private:
+  void WorkerThread();
+};
+
+inline void Log(const std::string& message) {
+  Logger::Singleton().LogMessage(message);
+}
+
+inline void Flush() {
+  Logger::Singleton().Flush();
+}
+
+} // logger namespace