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/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#include "BenchSysTimer_windows.h"
//Time
#define WIN32_LEAN_AND_MEAN 1
#include <windows.h>
static ULONGLONG winCpuTime() {
FILETIME createTime;
FILETIME exitTime;
FILETIME usrTime;
FILETIME sysTime;
if (0 == GetProcessTimes(GetCurrentProcess()
, &createTime, &exitTime
, &sysTime, &usrTime))
{
return 0;
}
ULARGE_INTEGER start_cpu_sys;
ULARGE_INTEGER start_cpu_usr;
start_cpu_sys.LowPart = sysTime.dwLowDateTime;
start_cpu_sys.HighPart = sysTime.dwHighDateTime;
start_cpu_usr.LowPart = usrTime.dwLowDateTime;
start_cpu_usr.HighPart = usrTime.dwHighDateTime;
return start_cpu_sys.QuadPart + start_cpu_usr.QuadPart;
}
void BenchSysTimer::startWall() {
if (0 == ::QueryPerformanceCounter(&this->fStartWall)) {
this->fStartWall.QuadPart = 0;
}
}
void BenchSysTimer::startCpu() {
this->fStartCpu = winCpuTime();
}
double BenchSysTimer::endCpu() {
ULONGLONG end_cpu = winCpuTime();
return static_cast<double>((end_cpu - this->fStartCpu)) / 10000.0L;
}
double BenchSysTimer::endWall() {
LARGE_INTEGER end_wall;
if (0 == ::QueryPerformanceCounter(&end_wall)) {
end_wall.QuadPart = 0;
}
LARGE_INTEGER ticks_elapsed;
ticks_elapsed.QuadPart = end_wall.QuadPart - this->fStartWall.QuadPart;
LARGE_INTEGER frequency;
if (0 == ::QueryPerformanceFrequency(&frequency)) {
return 0.0L;
} else {
return static_cast<double>(ticks_elapsed.QuadPart)
/ static_cast<double>(frequency.QuadPart)
* 1000.0L;
}
}
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