// StopWatch.cpp: implementation of the CStopWatch class.
//
//////////////////////////////////////////////////////////////////////
#include "stdafx.h"
#include "StopWatch.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif

//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CStopWatch::CStopWatch()
{
	m_swFreq.LowPart = m_swFreq.HighPart = 0;
	m_swStart = m_swFreq;
	m_swEnd = m_swFreq;
	m_fTimeforDuration = 0;

	QueryPerformanceFrequency(&m_swFreq);
//	m_swFreq.QuadPart = (LONGLONG)(2.41f*1024*1024*1024);
}

CStopWatch::~CStopWatch()
{
}

void CStopWatch::Start(void)
{
	QueryPerformanceCounter(&m_swStart);
}

void CStopWatch::End(void)
{
	QueryPerformanceCounter(&m_swEnd);
	m_fTimeforDuration = (m_swEnd.QuadPart - m_swStart.QuadPart)/(float)m_swFreq.QuadPart; 
}