Windows timer implementation for Command Queues.

src/OpenCL/OpenCL1/commandqueue.cpp

@@ -528,6 +528,75 @@ void Event::setDeviceData(void *data)
 	p_device_data = data;
 }
 
+#if defined(_WIN32)
+LARGE_INTEGER getFILETIMEoffset()
+{
+	SYSTEMTIME s;
+	FILETIME f;
+	LARGE_INTEGER t;
+
+	s.wYear = 1970;
+	s.wMonth = 1;
+	s.wDay = 1;
+	s.wHour = 0;
+	s.wMinute = 0;
+	s.wSecond = 0;
+	s.wMilliseconds = 0;
+	SystemTimeToFileTime(&s, &f);
+	t.QuadPart = f.dwHighDateTime;
+	t.QuadPart <<= 32;
+	t.QuadPart |= f.dwLowDateTime;
+	return (t);
+}
+
+void clock_gettime(timeval *tv)
+{
+	LARGE_INTEGER           t;
+	FILETIME            f;
+	double                  microseconds;
+	static LARGE_INTEGER    offset;
+	static double           frequencyToMicroseconds;
+	static int              initialized = 0;
+	static BOOL             usePerformanceCounter = 0;
+
+	if(!initialized)
+	{
+		LARGE_INTEGER performanceFrequency;
+		initialized = 1;
+		usePerformanceCounter = QueryPerformanceFrequency(&performanceFrequency);
+		if(usePerformanceCounter)
+		{
+			QueryPerformanceCounter(&offset);
+			frequencyToMicroseconds = (double)performanceFrequency.QuadPart / 1000000.;
+		}
+		else
+		{
+			offset = getFILETIMEoffset();
+			frequencyToMicroseconds = 10.;
+		}
+	}
+
+	if(usePerformanceCounter)
+	{
+		QueryPerformanceCounter(&t);
+	}
+	else
+	{
+		GetSystemTimeAsFileTime(&f);
+		t.QuadPart = f.dwHighDateTime;
+		t.QuadPart <<= 32;
+		t.QuadPart |= f.dwLowDateTime;
+	}
+
+	t.QuadPart -= offset.QuadPart;
+	microseconds = (double)t.QuadPart / frequencyToMicroseconds;
+	t.QuadPart = microseconds;
+
+	tv->tv_sec = t.QuadPart / 1000000;
+	tv->tv_usec = t.QuadPart % 1000000;
+}
+#endif
+
 void Event::updateTiming(Timing timing)
 {
 	if(timing >= Max)
@@ -542,14 +611,21 @@ void Event::updateTiming(Timing timing)
 		return;
 	}
 
-	struct timespec tp;
 	cl_ulong rs;
 
+#if defined(_WIN32)
+	struct timeval tv;
+	clock_gettime(&tv);
+	rs = tv.tv_usec;
+	rs += tv.tv_sec * 1000000;
+#else
+	struct timespec tp;
 	if(clock_gettime(CLOCK_MONOTONIC, &tp) != 0)
 		clock_gettime(CLOCK_REALTIME, &tp);
 
 	rs = tp.tv_nsec;
 	rs += tp.tv_sec * 1000000;
+#endif
 
 	p_timing[timing] = rs;