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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_EMBEDDER_CHANNEL_INIT_H_ | |
| 6 #define MOJO_EDK_EMBEDDER_CHANNEL_INIT_H_ | |
| 7 | |
| 8 #include "base/files/file.h" | |
| 9 #include "base/memory/ref_counted.h" | |
| 10 #include "base/memory/weak_ptr.h" | |
| 11 #include "mojo/edk/embedder/channel_info_forward.h" | |
| 12 #include "mojo/edk/system/system_impl_export.h" | |
| 13 #include "mojo/public/cpp/system/message_pipe.h" | |
| 14 | |
| 15 namespace base { | |
| 16 class MessageLoopProxy; | |
| 17 class TaskRunner; | |
| 18 } | |
| 19 | |
| 20 namespace mojo { | |
| 21 namespace embedder { | |
| 22 | |
| 23 // |ChannelInit| handles creation (and destruction) of the Mojo channel. It is | |
| 24 // not thread-safe, but may be used on any single thread (with a |MessageLoop|). | |
| 25 class MOJO_SYSTEM_IMPL_EXPORT ChannelInit { | |
| 26 public: | |
| 27 ChannelInit(); | |
| 28 ~ChannelInit(); | |
| 29 | |
| 30 // Initializes the channel. This takes ownership of |file|. Returns the | |
| 31 // primordial MessagePipe for the channel. | |
| 32 mojo::ScopedMessagePipeHandle Init( | |
| 33 base::PlatformFile file, | |
| 34 scoped_refptr<base::TaskRunner> io_thread_task_runner); | |
| 35 | |
| 36 // Notifies the channel that we (hence it) will soon be destroyed. | |
| 37 void WillDestroySoon(); | |
| 38 | |
| 39 private: | |
| 40 // Invoked on the thread on which this object lives once the channel has been | |
| 41 // established. (This is a static method that takes a weak pointer to self, | |
| 42 // since we want to destroy the channel even if we're destroyed.) | |
| 43 static void OnCreatedChannel(base::WeakPtr<ChannelInit> self, | |
| 44 scoped_refptr<base::TaskRunner> io_thread, | |
| 45 ChannelInfo* channel); | |
| 46 | |
| 47 scoped_refptr<base::TaskRunner> io_thread_task_runner_; | |
| 48 | |
| 49 // If non-null the channel has been established. | |
| 50 ChannelInfo* channel_info_; | |
| 51 | |
| 52 base::WeakPtrFactory<ChannelInit> weak_factory_; | |
| 53 | |
| 54 DISALLOW_COPY_AND_ASSIGN(ChannelInit); | |
| 55 }; | |
| 56 | |
| 57 } // namespace embedder | |
| 58 } // namespace mojo | |
| 59 | |
| 60 #endif // MOJO_EDK_EMBEDDER_CHANNEL_INIT_H_ | |
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