RealTimeClock.h

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/*
 * i6engine
 * Copyright (2016) Daniel Bonrath, Michael Baer, All rights reserved.
 *
 * This file is part of i6engine; i6engine is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 */

#ifndef __I6ENGINE_UTILS_REALTIMECLOCK_H__
#define __I6ENGINE_UTILS_REALTIMECLOCK_H__

#include <atomic>
#include <chrono>

#include "i6engine/utils/i6eSystemParameters.h"

#include "boost/thread.hpp"

namespace i6e {
namespace utils {

        class ISIXE_UTILS_API RealTimeClock {
        public:
                explicit RealTimeClock(const boost::function<void(void)> & f);

                ~RealTimeClock();

                uint64_t getCurrentTime(uint64_t lastTime) const;

                void setCurrentTime(uint64_t time);

                void Stop();

        protected:
                void Init();

        private:
                std::chrono::time_point<std::chrono::high_resolution_clock> _startTime;

                uint64_t _offset;

                boost::function<void(void)> _update;

                std::atomic<bool> _running;

                boost::thread _thread;

                void clockUpdater();

                RealTimeClock & operator=(const RealTimeClock &) = delete;
                RealTimeClock(const RealTimeClock &) = delete;
        };

} /* namespace utils */
} /* namespace i6e */

#endif /* __I6ENGINE_UTILS_REALTIMECLOCK_H__ */