root/library/tests/unittest-cpp/Win32/TimeHelpers.cpp @ 896

#include "TimeHelpers.h"
#include <windows.h>

namespace UnitTest {

Timer::Timer()
                : m_threadHandle ( ::GetCurrentThread() )
                , m_startTime ( 0 ) {
#if defined(_MSC_VER) && (_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 const ms ) {
        ::Sleep ( ms );
}

}