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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 #include "mojo/system/embedder/embedder.h" | |
| 6 | |
| 7 #include "base/bind.h" | |
| 8 #include "base/location.h" | |
| 9 #include "base/logging.h" | |
| 10 #include "base/memory/scoped_ptr.h" | |
| 11 #include "mojo/system/channel.h" | |
| 12 #include "mojo/system/core_impl.h" | |
| 13 #include "mojo/system/message_pipe.h" | |
| 14 #include "mojo/system/message_pipe_dispatcher.h" | |
| 15 | |
| 16 namespace mojo { | |
| 17 namespace embedder { | |
| 18 | |
| 19 struct ChannelInfo { | |
| 20 scoped_refptr<system::Channel> channel; | |
| 21 }; | |
| 22 | |
| 23 static void CreateChannelOnIOThread( | |
| 24 ScopedPlatformHandle platform_handle, | |
| 25 scoped_refptr<system::MessagePipe> message_pipe, | |
| 26 DidCreateChannelOnIOThreadCallback callback) { | |
| 27 CHECK(platform_handle.is_valid()); | |
| 28 | |
| 29 scoped_ptr<ChannelInfo> channel_info(new ChannelInfo); | |
| 30 | |
| 31 // Create and initialize a |system::Channel|. | |
| 32 channel_info->channel = new system::Channel(); | |
| 33 bool success = channel_info->channel->Init(platform_handle.Pass()); | |
| 34 DCHECK(success); | |
| 35 | |
| 36 // Attach the message pipe endpoint. | |
| 37 system::MessageInTransit::EndpointId endpoint_id = | |
| 38 channel_info->channel->AttachMessagePipeEndpoint(message_pipe, 1); | |
| 39 DCHECK_EQ(endpoint_id, system::Channel::kBootstrapEndpointId); | |
| 40 channel_info->channel->RunMessagePipeEndpoint( | |
| 41 system::Channel::kBootstrapEndpointId, | |
| 42 system::Channel::kBootstrapEndpointId); | |
| 43 | |
| 44 // Hand the channel back to the embedder. | |
| 45 callback.Run(channel_info.release()); | |
| 46 } | |
| 47 | |
| 48 void Init() { | |
| 49 Core::Init(new system::CoreImpl()); | |
| 50 } | |
| 51 | |
| 52 MojoHandle CreateChannel( | |
| 53 ScopedPlatformHandle platform_handle, | |
| 54 scoped_refptr<base::TaskRunner> io_thread_task_runner, | |
| 55 DidCreateChannelOnIOThreadCallback callback) { | |
| 56 DCHECK(platform_handle.is_valid()); | |
| 57 | |
| 58 std::pair<scoped_refptr<system::MessagePipeDispatcher>, | |
| 59 scoped_refptr<system::MessagePipe> > remote_message_pipe = | |
| 60 system::MessagePipeDispatcher::CreateRemoteMessagePipe(); | |
| 61 | |
| 62 system::CoreImpl* core_impl = static_cast<system::CoreImpl*>(Core::Get()); | |
| 63 DCHECK(core_impl); | |
| 64 MojoHandle rv = core_impl->AddDispatcher(remote_message_pipe.first); | |
| 65 // TODO(vtl): Do we properly handle the failure case here? | |
| 66 if (rv != MOJO_HANDLE_INVALID) { | |
| 67 io_thread_task_runner->PostTask(FROM_HERE, | |
| 68 base::Bind(&CreateChannelOnIOThread, | |
| 69 base::Passed(&platform_handle), | |
| 70 remote_message_pipe.second, | |
| 71 callback)); | |
| 72 } | |
| 73 return rv; | |
| 74 } | |
| 75 | |
| 76 void DestroyChannelOnIOThread(ChannelInfo* channel_info) { | |
| 77 DCHECK(channel_info); | |
| 78 DCHECK(channel_info->channel.get()); | |
| 79 channel_info->channel->Shutdown(); | |
| 80 delete channel_info; | |
| 81 } | |
| 82 | |
| 83 } // namespace embedder | |
| 84 } // namespace mojo | |
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