Improve load screen responsiveness

PortabilityLayer/WorkerThread.h

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <stdint.h>
+
+namespace PortabilityLayer
+{
+	class HostThreadEvent;
+
+	class WorkerThread
+	{
+	public:
+		typedef void(*Callback_t)(void *context);
+
+		static WorkerThread *Create();
+		virtual void Destroy() = 0;
+
+		virtual void AsyncExecuteTask(Callback_t callback, void *context) = 0;
+
+	protected:
+		WorkerThread();
+		virtual ~WorkerThread();
+	};
+}