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