Initial in-process implementation of some Mojo primitives.

mojo/system/message_pipe_dispatcher.h

+// Copyright 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef MOJO_SYSTEM_MESSAGE_PIPE_DISPATCHER_H_
+#define MOJO_SYSTEM_MESSAGE_PIPE_DISPATCHER_H_
+
+#include "base/basictypes.h"
+#include "base/compiler_specific.h"
+#include "base/memory/ref_counted.h"
+#include "mojo/system/dispatcher.h"
+
+namespace mojo {
+namespace system {
+
+class MessagePipe;
+
+// This is the |Dispatcher| implementation for message pipes (created by the
+// Mojo primitive |MojoCreateMessagePipe()|). This class is thread-safe.
+class MessagePipeDispatcher : public Dispatcher {
+ public:
+  MessagePipeDispatcher();
+
+  // Must be called before any other methods. (This method is not thread-safe.)
+  void Init(scoped_refptr<MessagePipe> message_pipe, unsigned port);
+
+ private:
+  friend class base::RefCountedThreadSafe<MessagePipeDispatcher>;
+  virtual ~MessagePipeDispatcher();
+
+  // |Dispatcher| implementation/overrides:
+  virtual void CancelAllWaitersNoLock() OVERRIDE;
+  virtual MojoResult CloseImplNoLock() OVERRIDE;
+  virtual MojoResult WriteMessageImplNoLock(
+      const void* bytes,
+      uint32_t num_bytes,
+      const MojoHandle* handles,
+      uint32_t num_handles,
+      MojoWriteMessageFlags flags) OVERRIDE;
+  virtual MojoResult ReadMessageImplNoLock(
+      void* bytes,
+      uint32_t* num_bytes,
+      MojoHandle* handles,
+      uint32_t* num_handles,
+      MojoReadMessageFlags flags) OVERRIDE;
+  virtual MojoResult AddWaiterImplNoLock(Waiter* waiter,
+                                         MojoWaitFlags flags,
+                                         MojoResult wake_result) OVERRIDE;
+  virtual void RemoveWaiterImplNoLock(Waiter* waiter) OVERRIDE;
+
+  // Protected by |lock()|:
+  scoped_refptr<MessagePipe> message_pipe_;  // This will be null if closed.
+  unsigned port_;
+
+  DISALLOW_COPY_AND_ASSIGN(MessagePipeDispatcher);
+};
+
+}  // namespace system
+}  // namespace mojo
+
+#endif  // MOJO_SYSTEM_MESSAGE_PIPE_DISPATCHER_H_