MercuryTimer.h

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#ifndef MERCURYTIMER_H
#define MERCURYTIMER_H

#include "global.h"
#include <map>

int64_t GetMicrosecondsSinceEpoch();

class MercuryTimer
{
public:
    MercuryTimer();
    ~MercuryTimer();
    double Peek();
    double Age();
    void Touch();
    inline void Pause() { m_paused = !m_paused; }

    MercuryTimer operator-(const MercuryTimer& t);
    MercuryTimer operator+(const MercuryTimer& t);
    void operator=(const MercuryTimer& t);
private:
    uint64_t GetTimeMicroseconds();
    int64_t FixupTimeIfLooped( int64_t usecs );
    int64_t FixupTimeIfBackwards( int64_t usecs );

    long m_secs;
    long m_usecs;

    double m_pTime;
    bool m_paused;
};

class MercuryTimerBenchmark
{
public:
    void Start( const MString & sName );
    void End( const MString & sName );
    void Print( );
private:
    struct BenchPoint
    {
        BenchPoint() { fTotalTime = 0; iTimesRun = 0; }
        float           fTotalTime;
        int             iTimesRun;
        MercuryTimer    tTimer;
    };
    std::map< MString, BenchPoint > m_mTotals;
};

extern MercuryTimerBenchmark BENCHMARK;

#endif

/*
 *Copyright (c) 2001-2003 Chris Danford, Glenn Maynard
 * (c) 2005 Joshua Allen
 * All rights reserved.
 * 
 * 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, and/or sell copies of the Software, and to permit persons to
 * whom the Software is furnished to do so, provided that the above
 * copyright notice(s) and this permission notice appear in all copies of
 * the Software and that both the above copyright notice(s) and this
 * permission notice appear in supporting documentation.
 * 
 * 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 OF
 * THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR HOLDERS
 * INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL INDIRECT
 * OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR
 * OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
 * PERFORMANCE OF THIS SOFTWARE.
 */

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