Update mojo sdk to rev f6c8ec07c01deebc13178d516225fd12695c3dc2

mojo/edk/system/endpoint_relayer.h

+// Copyright 2014 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_EDK_SYSTEM_ENDPOINT_RELAYER_H_
+#define MOJO_EDK_SYSTEM_ENDPOINT_RELAYER_H_
+
+#include "base/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/synchronization/lock.h"
+#include "mojo/edk/system/channel_endpoint_client.h"
+#include "mojo/edk/system/system_impl_export.h"
+
+namespace mojo {
+namespace system {
+
+class ChannelEndpoint;
+
+// This is a simple |ChannelEndpointClient| that just relays messages between
+// two |ChannelEndpoint|s (without the overhead of |MessagePipe|).
+class MOJO_SYSTEM_IMPL_EXPORT EndpointRelayer : public ChannelEndpointClient {
+ public:
+  EndpointRelayer();
+
+  // Gets the other port number (i.e., 0 -> 1, 1 -> 0).
+  static unsigned GetPeerPort(unsigned port);
+
+  // Initialize this object. This must be called before any other method.
+  void Init(ChannelEndpoint* endpoint0, ChannelEndpoint* endpoint1);
+
+  // |ChannelEndpointClient| methods:
+  bool OnReadMessage(unsigned port, MessageInTransit* message) override;
+  void OnDetachFromChannel(unsigned port) override;
+
+ private:
+  virtual ~EndpointRelayer();
+
+  // TODO(vtl): We could probably get away without the lock if we had a
+  // thread-safe |scoped_refptr|.
+  base::Lock lock_;  // Protects the following members.
+  scoped_refptr<ChannelEndpoint> endpoints_[2];
+
+  DISALLOW_COPY_AND_ASSIGN(EndpointRelayer);
+};
+
+}  // namespace system
+}  // namespace mojo
+
+#endif  // MOJO_EDK_SYSTEM_ENDPOINT_RELAYER_H_