source/tool/timer.cxx

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/*************************************************************************
 *
 *  The Contents of this file are made available subject to
 *  the terms of GNU Lesser General Public License Version 2.1.
 *
 *
 *    GNU Lesser General Public License Version 2.1
 *    =============================================
 *    Copyright 2005 by Kohei Yoshida.
 *    1039 Kingsway Dr., Apex, NC 27502, USA
 *
 *    This library is free software; you can redistribute it and/or
 *    modify it under the terms of the GNU Lesser General Public
 *    License version 2.1, as published by the Free Software Foundation.
 *
 *    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., 59 Temple Place, Suite 330, Boston,
 *    MA  02111-1307  USA
 *
 ************************************************************************/

#include "tool/timer.hxx"
#ifndef _WIN32
#include <sys/time.h>
#else
#include <windows.h>
#endif

namespace scsolver {

class TimerImpl
{
public:
        TimerImpl( double duration ) :
                m_fDuration(duration)
        {
        }

        ~TimerImpl() throw()
        {
        }

        void init()
        {
                m_fCurTime = getTime();
        }

        bool isTimedOut()
        {
                return (getTime() - m_fCurTime) > m_fDuration;
        }

private:

        double getTime()
        {
#ifndef _WIN32
                timeval tv;
                gettimeofday(&tv, NULL);
                return tv.tv_sec + tv.tv_usec / 1000000.0;
#else
                FILETIME ft;
                __int64 *time64 = (__int64 *) &ft;

                GetSystemTimeAsFileTime (&ft);

                /* Convert from 100s of nanoseconds since 1601-01-01
                 * to seconds since the Unix epoch.
                 */
                *time64 -= 116444736000000000i64;
                return *time64 / 10000000.0;
#endif
        }

        double m_fDuration;
        double m_fCurTime;
};

//-----------------------------------------------------------------

/*
Timer::Timer()
{
        // disabled
}
*/

Timer::Timer( double duration ) :
        m_pImpl( new TimerImpl(duration) )
{
}

Timer::~Timer() throw()
{
}

void Timer::init()
{
        m_pImpl->init();
}

bool Timer::isTimedOut() const
{
        return m_pImpl->isTimedOut();
}

}

---