be9ad4e5fc
http://codereview.appspot.com/4548090/ git-svn-id: http://skia.googlecode.com/svn/trunk@1534 2bbb7eff-a529-9590-31e7-b0007b416f81
56 lines
1.5 KiB
C++
56 lines
1.5 KiB
C++
#include "BenchSysTimer_windows.h"
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//Time
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#define WIN32_LEAN_AND_MEAN 1
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#include <Windows.h>
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static ULONGLONG winCpuTime() {
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FILETIME createTime;
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FILETIME exitTime;
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FILETIME usrTime;
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FILETIME sysTime;
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if (0 == GetProcessTimes(GetCurrentProcess()
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, &createTime, &exitTime
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, &sysTime, &usrTime))
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{
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return 0;
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}
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ULARGE_INTEGER start_cpu_sys;
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ULARGE_INTEGER start_cpu_usr;
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start_cpu_sys.LowPart = sysTime.dwLowDateTime;
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start_cpu_sys.HighPart = sysTime.dwHighDateTime;
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start_cpu_usr.LowPart = usrTime.dwLowDateTime;
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start_cpu_usr.HighPart = usrTime.dwHighDateTime;
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return start_cpu_sys.QuadPart + start_cpu_usr.QuadPart;
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}
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void BenchSysTimer::startWall() {
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if (0 == ::QueryPerformanceCounter(&this->fStartWall)) {
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this->fStartWall.QuadPart = 0;
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}
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}
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void BenchSysTimer::startCpu() {
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this->fStartCpu = winCpuTime();
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}
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double BenchSysTimer::endCpu() {
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ULONGLONG end_cpu = winCpuTime();
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return (end_cpu - this->fStartCpu) / 10000;
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}
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double BenchSysTimer::endWall() {
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LARGE_INTEGER end_wall;
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if (0 == ::QueryPerformanceCounter(&end_wall)) {
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end_wall.QuadPart = 0;
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}
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LARGE_INTEGER ticks_elapsed;
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ticks_elapsed.QuadPart = end_wall.QuadPart - this->fStartWall.QuadPart;
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LARGE_INTEGER frequency;
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if (0 == ::QueryPerformanceFrequency(&frequency)) {
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return 0;
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} else {
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return (double)ticks_elapsed.QuadPart / frequency.QuadPart * 1000;
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}
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}
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