*

LifeCore/Timer.cpp

@@ -0,0 +1,60 @@
+#include "Timer.h"
+#include <Windows.h>
+
+//#define TIMER_TGT
+
+namespace LifeCore
+{
+	Timer::Timer()
+		:timeElapsed(0)
+	{
+#ifdef TIMER_TGT
+		if(refCount == 0)
+			timeBeginPeriod(1);
+		refCount++;
+#else
+		QueryPerformanceFrequency((LARGE_INTEGER *)&perfFreq);
+#endif
+	}
+	Timer::~Timer()
+	{
+#ifdef TIMER_TGT
+		refCount--;
+		if(refCount == 0)
+			timeEndPeriod(1);
+#endif
+	}
+	void Timer::Start()
+	{
+#ifdef TIMER_TGT
+		lastTime = timeGetTime();
+#else
+		DWORD_PTR old_mask = SetThreadAffinityMask(GetCurrentThread(), 0);
+		QueryPerformanceCounter((LARGE_INTEGER *)&lastTime);
+		SetThreadAffinityMask(GetCurrentThread(), old_mask);
+#endif
+	}
+	void Timer::Stop()
+	{
+#ifdef TIMER_TGT
+		curTime = timeGetTime();
+		diff = curTime - lastTime;
+		timeElapsed = 1.0 / (double)diff; //time in SECONDS
+#else
+		DWORD_PTR old_mask = SetThreadAffinityMask(GetCurrentThread(), 0);
+		QueryPerformanceCounter((LARGE_INTEGER *)&curTime);
+		SetThreadAffinityMask(GetCurrentThread(), old_mask);
+		if(lastTime == 0)
+			timeElapsed = 0;
+		else
+		{
+			timeElapsed = (float)((double)(curTime - lastTime) / (double)perfFreq);
+		}
+
+#endif
+	}
+	float Timer::getTimeElapsed()
+	{
+		return timeElapsed;
+	}
+}