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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #ifndef MOJO_EDK_SYSTEM_ENDPOINT_RELAYER_H_ | |
6 #define MOJO_EDK_SYSTEM_ENDPOINT_RELAYER_H_ | |
7 | |
8 #include "base/macros.h" | |
9 #include "base/memory/ref_counted.h" | |
10 #include "base/synchronization/lock.h" | |
11 #include "mojo/edk/system/channel_endpoint_client.h" | |
12 #include "mojo/edk/system/system_impl_export.h" | |
13 | |
14 namespace mojo { | |
15 namespace system { | |
16 | |
17 class ChannelEndpoint; | |
18 | |
19 // This is a simple |ChannelEndpointClient| that just relays messages between | |
20 // two |ChannelEndpoint|s (without the overhead of |MessagePipe|). | |
21 class MOJO_SYSTEM_IMPL_EXPORT EndpointRelayer : public ChannelEndpointClient { | |
22 public: | |
23 EndpointRelayer(); | |
24 | |
25 // Gets the other port number (i.e., 0 -> 1, 1 -> 0). | |
26 static unsigned GetPeerPort(unsigned port); | |
27 | |
28 // Initialize this object. This must be called before any other method. | |
29 void Init(ChannelEndpoint* endpoint0, ChannelEndpoint* endpoint1); | |
30 | |
31 // |ChannelEndpointClient| methods: | |
32 bool OnReadMessage(unsigned port, MessageInTransit* message) override; | |
33 void OnDetachFromChannel(unsigned port) override; | |
34 | |
35 private: | |
36 ~EndpointRelayer() override; | |
37 | |
38 // TODO(vtl): We could probably get away without the lock if we had a | |
39 // thread-safe |scoped_refptr|. | |
40 base::Lock lock_; // Protects the following members. | |
41 scoped_refptr<ChannelEndpoint> endpoints_[2]; | |
42 | |
43 DISALLOW_COPY_AND_ASSIGN(EndpointRelayer); | |
44 }; | |
45 | |
46 } // namespace system | |
47 } // namespace mojo | |
48 | |
49 #endif // MOJO_EDK_SYSTEM_ENDPOINT_RELAYER_H_ | |
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