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/**
* @file HiResTimer.h
* @brief
* @note
*/
#ifndef _HI_RES_TIMER_H_
#define _HI_RES_TIMER_H_
#ifdef WIN32
#include <windows.h> // probably already done in stdafx.h
static LARGE_INTEGER start;
static LARGE_INTEGER stop;
static LARGE_INTEGER freq;
static _int64 elapsedCounts;
static double elapsedMillis;
static double elapsedMicros;
static HANDLE processHandle;
static DWORD prevPriorityClass;
void HrtInit()
{
processHandle = GetCurrentProcess();
prevPriorityClass = GetPriorityClass(processHandle);
QueryPerformanceFrequency(&freq);
}
void HrtStart()
{
QueryPerformanceCounter(&start);
}
void HrtSetPriority(DWORD priority)
{
int flag;
prevPriorityClass = GetPriorityClass(processHandle);
flag = SetPriorityClass(processHandle, priority);
}
void HrtResetPriority(void)
{
int flag = SetPriorityClass(processHandle, prevPriorityClass);
}
double HrtElapsedMillis()
{
QueryPerformanceCounter(&stop);
elapsedCounts = (stop.QuadPart - start.QuadPart);
elapsedMillis = ((elapsedCounts * 1000.0) / freq.QuadPart);
return elapsedMillis;
}
#endif
#endif