1 files changed, 58 insertions, 0 deletions
diff --git a/extern/recastnavigation/Recast/Source/RecastTimer.cpp b/extern/recastnavigation/Recast/Source/RecastTimer.cpp
new file mode 100644
index 00000000000..51ffb7d3160
--- /dev/null
+++ b/extern/recastnavigation/Recast/Source/RecastTimer.cpp
@@ -0,0 +1,58 @@
+#include "RecastTimer.h"
+
+#if defined(WIN32)
+
+// Win32
+#include <windows.h>
+
+rcTimeVal rcGetPerformanceTimer()
+{
+	__int64 count;
+	QueryPerformanceCounter((LARGE_INTEGER*)&count);
+	return count;
+}
+
+int rcGetDeltaTimeUsec(rcTimeVal start, rcTimeVal end)
+{
+	static __int64 freq = 0;
+	if (freq == 0)
+		QueryPerformanceFrequency((LARGE_INTEGER*)&freq);
+	__int64 elapsed = end - start;
+	return (int)(elapsed*1000000 / freq);
+}
+
+#elif defined(__MACH__)
+
+// OSX
+#include <mach/mach_time.h>
+
+rcTimeVal rcGetPerformanceTimer()
+{
+	return mach_absolute_time();
+}
+
+int rcGetDeltaTimeUsec(rcTimeVal start, rcTimeVal end)
+{
+	static mach_timebase_info_data_t timebaseInfo;
+	if (timebaseInfo.denom == 0)
+		mach_timebase_info(&timebaseInfo);
+	uint64_t elapsed = end - start;
+	uint64_t nanosec = elapsed * timebaseInfo.numer / timebaseInfo.denom;
+	return (int)(nanosec / 1000);
+}
+
+#else
+
+// TODO: Linux, etc
+
+rcTimeVal rcGetPerformanceTimer()
+{
+	return 0;
+}
+
+int rcGetDeltaTimeUsec(rcTimeVal start, rcTimeVal end)
+{
+	return 0;
+}
+
+#endif
+\ No newline at end of file