Moving threading utils to poly.

src/poly/threading_win.cc

@@ -0,0 +1,30 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2014 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#include <poly/threading.h>
+
+namespace poly {
+namespace threading {
+
+uint32_t current_thread_id() {
+  return static_cast<uint32_t>(GetCurrentThreadId());
+}
+
+void Yield() { SwitchToThread(); }
+
+void Sleep(std::chrono::microseconds duration) {
+  if (duration.count() < 100) {
+    SwitchToThread();
+  } else {
+    Sleep(duration.count() / 1000);
+  }
+}
+
+}  // namespace threading
+}  // namespace poly