/***
* This file is based on or incorporates material from the UnitTest++ r30 open source project.
* Microsoft is not the original author of this code but has modified it and is licensing the code under 
* the MIT License. Microsoft reserves all other rights not expressly granted under the MIT License, 
* whether by implication, estoppel or otherwise. 
*
* UnitTest++ r30 
*
* Copyright (c) 2006 Noel Llopis and Charles Nicholson
* Portions Copyright (c) Microsoft Corporation
*
* All Rights Reserved.
*
* MIT License
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software 
* and associated documentation files (the "Software"), to deal in the Software without restriction, 
* including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, 
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, 
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or 
* substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
* INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE 
* AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
***/

#include "stdafx.h"

namespace UnitTest {

Timer::Timer()
	: m_threadHandle(::GetCurrentThread())
	, m_startTime(0)
{
#if defined(UNITTEST_WIN32) && (_MSC_VER == 1200) // VC6 doesn't have DWORD_PTR
	typedef unsigned long DWORD_PTR;
#endif

	DWORD_PTR systemMask;
	::GetProcessAffinityMask(GetCurrentProcess(), &m_processAffinityMask, &systemMask);
	::SetThreadAffinityMask(m_threadHandle, 1);
	::QueryPerformanceFrequency(reinterpret_cast< LARGE_INTEGER* >(&m_frequency));
	::SetThreadAffinityMask(m_threadHandle, m_processAffinityMask);
}

void Timer::Start()
{
	m_startTime = GetTime();
}

double Timer::GetTimeInMs() const
{
	__int64 const elapsedTime = GetTime() - m_startTime;
	double const seconds = double(elapsedTime) / double(m_frequency);
	return seconds * 1000.0;
}

__int64 Timer::GetTime() const
{
	LARGE_INTEGER curTime;
	::SetThreadAffinityMask(m_threadHandle, 1);
	::QueryPerformanceCounter(&curTime);
	::SetThreadAffinityMask(m_threadHandle, m_processAffinityMask);
	return curTime.QuadPart;
}

void TimeHelpers::SleepMs(int ms)
{
	::Sleep(ms);
}

}