Moving threading utils to poly.

src/poly/threading_mac.cc

@@ -0,0 +1,32 @@
+/**
+ ******************************************************************************
+ * 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>
+
+#include <pthread.h>
+#include <time.h>
+
+namespace poly {
+namespace threading {
+
+uint32_t current_thread_id() {
+  mach_port_t tid = pthread_mach_thread_np(pthread_self());
+  return static_cast<uint32_t>(tid);
+}
+
+void Yield() { pthread_yield_np(); }
+
+void Sleep(std::chrono::microseconds duration) {
+  timespec rqtp = {duration.count() / 1000000, duration.count() % 1000};
+  nanosleep(&rqtp, nullptr);
+  // TODO(benvanik): spin while rmtp >0?
+}
+
+}  // namespace threading
+}  // namespace poly