Moving threading utils to poly.

src/poly/threading.h

@@ -0,0 +1,36 @@
+/**
+ ******************************************************************************
+ * 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. *
+ ******************************************************************************
+ */
+
+#ifndef POLY_THREADING_H_
+#define POLY_THREADING_H_
+
+#include <chrono>
+#include <cstdint>
+
+namespace poly {
+namespace threading {
+
+// Gets a stable thread-specific ID, but may not be. Use for informative
+// purposes only.
+uint32_t current_thread_id();
+
+// Yields the current thread to the scheduler. Maybe.
+void Yield();
+
+// Sleeps the current thread for at least as long as the given duration.
+void Sleep(std::chrono::microseconds duration);
+template <typename Rep, typename Period>
+void Sleep(std::chrono::duration<Rep, Period> duration) {
+  Sleep(std::chrono::duration_cast<std::chrono::microseconds>(duration));
+}
+
+}  // namespace threading
+}  // namespace poly
+
+#endif  // POLY_THREADING_H_