Condition.h

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// -*- mode: c++; indent-tabs-mode: nil; c-basic-offset: 4; coding: iso-8859-1; -*-

/*
ACT-CV - Machine Vision for Cognitive Modeling
Copyright (c) 2008 Marc Halbruegge

This program 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 2 of the License, or
(at your option) any later version.

This program 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 this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
*/

#pragma once

#include <condition_variable>
#include <mutex>

#include <boost/noncopyable.hpp>

namespace mhthreads {
    
class Condition : public boost::noncopyable {
    std::condition_variable cond_;
    std::mutex mutex_;

public:
    Condition() {
    }

    void Signal() {
        cond_.notify_one();
    }
    int Wait() {
        std::unique_lock<std::mutex> lock(mutex_);
        cond_.wait(lock);
        return 0;
    }
    int TimedWait(unsigned int sec, unsigned int nsec) {
        std::unique_lock<std::mutex> lock(mutex_);
#ifdef __GNUC__
        return cond_.wait_for(lock, std::chrono::nanoseconds(sec*1000000 + nsec)) == std::cv_status::no_timeout
            ? 0 
            : 1;
#else
        return cond_.wait_for(lock, std::chrono::nanoseconds(sec*1000000 + nsec)) ? 0 : 1;
#endif
    }
};


}; // end of namespace mhthreads