43 lines
1021 B
C++
43 lines
1021 B
C++
// Copyright (C) 2012 Jérôme Leclercq
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// This file is part of the "Nazara Engine".
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#include <Nazara/Core/Win32/ClockImpl.hpp>
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#include <Nazara/Core/Error.hpp>
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#include <ctime>
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#include <windows.h>
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#include <Nazara/Core/Debug.hpp>
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namespace
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{
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LARGE_INTEGER frequency; // La fréquence ne varie pas pas au cours de l'exécution
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}
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bool NzClockImplInitializeHighPrecision()
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{
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return QueryPerformanceFrequency(&frequency) != 0;
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}
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nzUInt64 NzClockImplGetMicroseconds()
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{
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// http://msdn.microsoft.com/en-us/library/windows/desktop/ms644904(v=vs.85).aspx
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HANDLE thread = GetCurrentThread();
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DWORD oldMask = SetThreadAffinityMask(thread, 1);
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LARGE_INTEGER time;
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QueryPerformanceCounter(&time);
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SetThreadAffinityMask(thread, oldMask);
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return time.QuadPart * 1000000ULL / frequency.QuadPart;
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}
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nzUInt64 NzClockImplGetMilliseconds()
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{
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#ifdef NAZARA_PLATFORM_WINDOWS_VISTA
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return GetTickCount64();
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#else
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return GetTickCount();
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#endif
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}
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