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TimeHelpers.cpp

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TimeHelpers.cpp

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#include "TimeHelpers.h"
#define WIN32_LEAN_AND_MEAN
#include <windows.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);
}
}
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