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//
// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
#include "win32/Win32Timer.h"
Win32Timer::Win32Timer()
: mRunning(false),
mStartTime(0),
mStopTime(0)
{
}
void Win32Timer::start()
{
LARGE_INTEGER frequency;
QueryPerformanceFrequency(&frequency);
mFrequency = frequency.QuadPart;
LARGE_INTEGER curTime;
QueryPerformanceCounter(&curTime);
mStartTime = curTime.QuadPart;
mRunning = true;
}
void Win32Timer::stop()
{
LARGE_INTEGER curTime;
QueryPerformanceCounter(&curTime);
mStopTime = curTime.QuadPart;
mRunning = false;
}
double Win32Timer::getElapsedTime() const
{
LONGLONG endTime;
if (mRunning)
{
LARGE_INTEGER curTime;
QueryPerformanceCounter(&curTime);
endTime = curTime.QuadPart;
}
else
{
endTime = mStopTime;
}
return static_cast<double>(endTime - mStartTime) / mFrequency;
}
Timer *CreateTimer()
{
return new Win32Timer();
}
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