Move Mutex and Monitor from vm/ to platform/

runtime/platform/thread.h

Index: runtime/platform/thread.h
diff --git a/runtime/platform/thread.h b/runtime/platform/thread.h
new file mode 100644
index 0000000000000000000000000000000000000000..0eb8da13b2b502412cc21ac54951290785a4a64e
--- /dev/null
+++ b/runtime/platform/thread.h
@@ -0,0 +1,86 @@
+// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// for details. All rights reserved. Use of this source code is governed by a
+// BSD-style license that can be found in the LICENSE file.
+
+#ifndef PLATFORM_THREAD_H_
+#define PLATFORM_THREAD_H_
+
+#include "platform/globals.h"
+
+// Declare the OS-specific types ahead of defining the generic classes.
+#if defined(TARGET_OS_LINUX)
+#include "platform/thread_linux.h"
+#elif defined(TARGET_OS_MACOS)
+#include "platform/thread_macos.h"
+#elif defined(TARGET_OS_WINDOWS)
+#include "platform/thread_win.h"
+#else
+#error Unknown target os.
+#endif
+
+namespace dart {
+
+class Thread {
+ public:
+  // Function to be called on thread start.
+  typedef void (*ThreadStartFunction) (uword parameter);
+
+  // TODO(iposva): Define the proper interface for spawning and killing threads.
+  Thread(ThreadStartFunction function, uword parameters);
+  ~Thread();
+
+ private:
+  ThreadData data_;
+
+  DISALLOW_COPY_AND_ASSIGN(Thread);
+};
+
+
+class Mutex {
+ public:
+  Mutex();
+  ~Mutex();
+
+  void Lock();
+  bool TryLock();
+  void Unlock();
+
+ private:
+  MutexData data_;
+
+  DISALLOW_COPY_AND_ASSIGN(Mutex);
+};
+
+
+class Monitor {
+ public:
+  enum WaitResult {
+    kNotified,
+    kTimedOut
+  };
+
+  static const int64_t kNoTimeout = 0;
+
+  Monitor();
+  ~Monitor();
+
+  void Enter();
+  void Exit();
+
+  // Wait for notification or timeout.
+  WaitResult Wait(int64_t millis);
+
+  // Notify waiting threads.
+  void Notify();
+  void NotifyAll();
+
+ private:
+  MonitorData data_;  // OS-specific data.
+
+  DISALLOW_COPY_AND_ASSIGN(Monitor);
+};
+
+}  // namespace dart
+
+
+#endif  // PLATFORM_THREAD_H_