Add Platform::Yield

Source/Engine/Platform/Win32/IncludeWindowsHeaders.h

@@ -68,6 +68,7 @@
 #undef CreateMutex
 #undef DrawState
 #undef LoadLibrary
+#undef Yield
 #undef GetEnvironmentVariable
 #undef SetEnvironmentVariable
 

Source/Engine/Platform/Win32/Win32Platform.cpp

@@ -400,6 +400,11 @@ void Win32Platform::Sleep(int32 milliseconds)
     WaitForSingleObject(timer, INFINITE);
 }
 
+void Win32Platform::Yield()
+{
+    SwitchToThread();
+}
+
 double Win32Platform::GetTimeSeconds()
 {
     LARGE_INTEGER counter;

Source/Engine/Platform/Win32/Win32Platform.h

@@ -100,6 +100,7 @@ public:
     static void SetThreadPriority(ThreadPriority priority);
     static void SetThreadAffinityMask(uint64 affinityMask);
     static void Sleep(int32 milliseconds);
+    static void Yield();
     static double GetTimeSeconds();
     static uint64 GetTimeCycles();
     static uint64 GetClockFrequency();