mmd_t4_prism/ProfTimer.hpp

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#ifndef _PROFTIMER_HPP_
#define _PROFTIMER_HPP_

#ifdef WIN32
#define WIN
#endif

#ifdef WIN
    #include <windows.h>
#else // LINUX
    #include <time.h>
#endif
// very simple, high-precision (at least in theory) timer for timing API calls


struct ProfTimer {
    void Start(void)
    {
#ifdef WIN
        QueryPerformanceCounter(&mTimeStart);
#else
        clock_gettime(CLOCK_REALTIME,&mTimeStart);
#endif
    }

    void Stop(void)
    {
#ifdef WIN
        QueryPerformanceCounter(&mTimeStop);
#else
        clock_gettime(CLOCK_REALTIME, &mTimeStop);
#endif
    }

    double GetDurationInSecs(void) const
    {
#ifdef WIN
        LARGE_INTEGER freq;
        QueryPerformanceFrequency(&freq);
        return ((double)(mTimeStop.QuadPart-mTimeStart.QuadPart)/(double)freq.QuadPart);
#else
        return double(mTimeStop.tv_sec - mTimeStart.tv_sec) + (double(mTimeStop.tv_nsec - mTimeStart.tv_nsec)/double(1000000000));
#endif
    }

#ifdef WIN
    LARGE_INTEGER mTimeStart;
    LARGE_INTEGER mTimeStop;
#else
    timespec mTimeStart;
    timespec mTimeStop;
#endif
};


#endif // _PROFTIMER_HPP_

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