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/* Copyright (c) 2012 Patrick Ruoff
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*/
#include "timer.h"
#include <stdlib.h>
// ----------------------------------------------------------------------------
Timer::Timer()
: startTime(0), endTime(0), running(false)
{
#ifdef WIN32
QueryPerformanceFrequency(&frequency);
startCount.QuadPart = 0;
endCount.QuadPart = 0;
#else
startCount.tv_sec = startCount.tv_usec = 0;
endCount.tv_sec = endCount.tv_usec = 0;
#endif
}
void Timer::start()
{
#ifdef WIN32
QueryPerformanceCounter(&startCount);
#else
gettimeofday(&startCount, NULL);
#endif
running = true;
}
void Timer::stop()
{
#ifdef WIN32
QueryPerformanceCounter(&endCount);
#else
gettimeofday(&endCount, NULL);
#endif
running = false;
}
double Timer::elapsed()
{
#ifdef WIN32
if (running)
QueryPerformanceCounter(&endCount);
startTime = startCount.QuadPart * (1e3 / frequency.QuadPart);
endTime = endCount.QuadPart * (1e3 / frequency.QuadPart);
return endTime - startTime;
#else
if(running)
gettimeofday(&endCount, NULL);
startTime = (startCount.tv_sec) + startCount.tv_usec * 1e-6;
endTime = (endCount.tv_sec) + endCount.tv_usec * 1e-6;
return (endTime - startTime) * 1e3;
#endif
}
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