setup render-thread

TestApp1/TestApp1.cpp

 class TestApp1 : public DKApplication
 {
 	DKObject<DKWindow> window;
-	DKObject<DKScreen> screen;
+	DKObject<DKThread> renderThread;
+
+	DKAtomicNumber32 runningRenderThread;
 public:
+	void RenderThread(void)
+	{
+		DKObject<DKGraphicsDevice> device = DKGraphicsDevice::SharedInstance();
+		DKObject<DKCommandQueue> queue = device->CreateCommandQueue();
+		DKObject<DKCommandBuffer> buffer = queue->CreateCommandBuffer();
+		DKObject<DKSwapChain> swapChain = queue->CreateSwapChain(window);
+
+		DKTimer timer;
+		timer.Reset();
+
+		DKLog("Render thread begin");
+		while (!runningRenderThread.CompareAndSet(0, 0))
+		{
+
+
+			DKThread::Sleep(0.01);
+		}
+		DKLog("RenderThread terminating...");
+	}
+
 	void OnInitialize(void) override
 	{
 		DKLog("%s", DKGL_FUNCTION_NAME);
 		try {
 			window = DKWindow::Create("DefaultWindow");
-			screen = DKOBJECT_NEW DKScreen(window, NULL);
 		}
 		catch (DKError& e)
 		{
 			if (e.type == DKWindow::WindowEvent::WindowClosed)
 				DKApplication::Instance()->Terminate(0);
 		}),
-			NULL, NULL);
-
-		DKObject<DKGraphicsDevice> device = DKGraphicsDevice::SharedInstance();
-		DKObject<DKCommandQueue> queue = device->CreateCommandQueue();
-		DKObject<DKCommandBuffer> buffer = queue->CreateCommandBuffer();
-		DKObject<DKSwapChain> swapChain = queue->CreateSwapChain(window);
+		NULL, NULL);
 
+		runningRenderThread = 1;
+		renderThread = DKThread::Create(DKFunction(this, &TestApp1::RenderThread)->Invocation());
 	}
 	void OnTerminate(void) override
 	{
 		DKLog("%s", DKGL_FUNCTION_NAME);
+
+		runningRenderThread = 0;
+		renderThread->WaitTerminate();
+		renderThread = NULL;
+		window = NULL;
+
 		DKLog("Memory Pool Statistics");
 		size_t numBuckets = DKMemoryPoolNumberOfBuckets();
 		DKMemoryPoolBucketStatus* buckets = new DKMemoryPoolBucketStatus[numBuckets];