#include "Timer.hpp"

Timer::Timer() : isStarted_(false) 
{
}
	
bool Timer::isStarted() {
  return isStarted_;
}

unsigned long Timer::getTickCount()
{
	#ifdef WIN32
		// return number of ms since last reboot
		return GetTickCount();
	#else
		// return number of ms since 1970/1/1
		struct timeval cTime;
		gettimeofday(&cTime, 0);
		return (cTime.tv_sec * 1000) + (cTime.tv_usec / 1000);
	#endif
}    	

	void Timer::initTimer()
	{
	  isStarted_ = true;
	#ifdef WIN32
		temps = GetTickCount();
		QueryPerformanceFrequency(&ticksPerSecond);
  		QueryPerformanceCounter(&tick1);		
	#else
		gettimeofday(&sTime, 0);		
	#endif
	}

	unsigned long Timer::getMilliSec()
	{
    if (! isStarted_) return 0;
	#ifdef WIN32
		return GetTickCount() - temps;
	#else
	   struct timeval	cTime;
	   gettimeofday(&cTime, 0);
	   return ((cTime.tv_sec - sTime.tv_sec) * 1000)
	      + ((cTime.tv_usec - sTime.tv_usec) / 1000);
	#endif
	}

	unsigned long Timer::getMicroSec()
	{
    if (! isStarted_) return 0;
	#ifdef WIN32
		QueryPerformanceCounter(&tick2);
		return ((tick2.QuadPart - tick1.QuadPart) * 1000000) / ticksPerSecond.QuadPart;
	#else
	   struct timeval	cTime;
	   gettimeofday(&cTime, 0);
	   return ((cTime.tv_sec - sTime.tv_sec) * 1000000)
	      + ((cTime.tv_usec - sTime.tv_usec));
	#endif
	}