alexpete
41 lines
1.1 KiB
C++
41 lines
1.1 KiB
C++
// Modifications copyright Amazon.com, Inc. or its affiliates
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// Modifications copyright Crytek GmbH
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#include "timer.h"
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void InitTimer(Timer_t* psTimer)
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{
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#if defined(_WIN32)
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QueryPerformanceFrequency(&psTimer->frequency);
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#endif
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}
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void ResetTimer(Timer_t* psTimer)
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{
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#if defined(_WIN32)
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QueryPerformanceCounter(&psTimer->startCount);
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#else
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gettimeofday(&psTimer->startCount, 0);
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#endif
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}
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/* Returns time in micro seconds */
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double ReadTimer(Timer_t* psTimer)
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{
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double startTimeInMicroSec, endTimeInMicroSec;
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#if defined(_WIN32)
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const double freq = (1000000.0 / psTimer->frequency.QuadPart);
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QueryPerformanceCounter(&psTimer->endCount);
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startTimeInMicroSec = psTimer->startCount.QuadPart * freq;
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endTimeInMicroSec = psTimer->endCount.QuadPart * freq;
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#else
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gettimeofday(&psTimer->endCount, 0);
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startTimeInMicroSec = (psTimer->startCount.tv_sec * 1000000.0) + psTimer->startCount.tv_usec;
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endTimeInMicroSec = (psTimer->endCount.tv_sec * 1000000.0) + psTimer->endCount.tv_usec;
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#endif
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return endTimeInMicroSec - startTimeInMicroSec;
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}
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