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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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