First commit

src/Nazara/Core/Win32/ClockImpl.cpp

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