| // 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_EDK_SYSTEM_PROXY_MESSAGE_PIPE_ENDPOINT_H_ |
| #define MOJO_EDK_SYSTEM_PROXY_MESSAGE_PIPE_ENDPOINT_H_ |
| |
| #include "base/memory/ref_counted.h" |
| #include "mojo/edk/system/message_in_transit.h" |
| #include "mojo/edk/system/message_pipe_endpoint.h" |
| #include "mojo/edk/system/system_impl_export.h" |
| #include "mojo/public/cpp/system/macros.h" |
| |
| namespace mojo { |
| namespace system { |
| |
| class ChannelEndpoint; |
| class LocalMessagePipeEndpoint; |
| class MessagePipe; |
| |
| // A |ProxyMessagePipeEndpoint| is an endpoint which delegates everything to a |
| // |ChannelEndpoint|, which may be co-owned by a |Channel|. Like any |
| // |MessagePipeEndpoint|, a |ProxyMessagePipeEndpoint| is owned by a |
| // |MessagePipe|. |
| // |
| // For example, a |MessagePipe| with one endpoint local and the other endpoint |
| // remote consists of a |LocalMessagePipeEndpoint| and a |
| // |ProxyMessagePipeEndpoint|, with only the local endpoint being accessible via |
| // a |MessagePipeDispatcher|. |
| class MOJO_SYSTEM_IMPL_EXPORT ProxyMessagePipeEndpoint final |
| : public MessagePipeEndpoint { |
| public: |
| explicit ProxyMessagePipeEndpoint(ChannelEndpoint* channel_endpoint); |
| ~ProxyMessagePipeEndpoint() override; |
| |
| // Returns |channel_endpoint_| and resets |channel_endpoint_| to null. This |
| // may be called at most once, after which |Close()| need not be called. |
| // |
| // Note: The returned |ChannelEndpoint| must have its client changed while |
| // still under |MessagePipe|'s lock (which this must have also been called |
| // under). |
| scoped_refptr<ChannelEndpoint> ReleaseChannelEndpoint(); |
| |
| // |MessagePipeEndpoint| implementation: |
| Type GetType() const override; |
| bool OnPeerClose() override; |
| void EnqueueMessage(scoped_ptr<MessageInTransit> message) override; |
| void Close() override; |
| |
| private: |
| void DetachIfNecessary(); |
| |
| scoped_refptr<ChannelEndpoint> channel_endpoint_; |
| |
| MOJO_DISALLOW_COPY_AND_ASSIGN(ProxyMessagePipeEndpoint); |
| }; |
| |
| } // namespace system |
| } // namespace mojo |
| |
| #endif // MOJO_EDK_SYSTEM_PROXY_MESSAGE_PIPE_ENDPOINT_H_ |