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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/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/embedder/platform_support.h" | |
| 12 #include "mojo/system/channel.h" | |
| 13 #include "mojo/system/channel_endpoint.h" | |
| 14 #include "mojo/system/core.h" | |
| 15 #include "mojo/system/entrypoints.h" | |
| 16 #include "mojo/system/message_in_transit.h" | |
| 17 #include "mojo/system/message_pipe_dispatcher.h" | |
| 18 #include "mojo/system/platform_handle_dispatcher.h" | |
| 19 #include "mojo/system/raw_channel.h" | |
| 20 | |
| 21 namespace mojo { | |
| 22 namespace embedder { | |
| 23 | |
| 24 // This is defined here (instead of a header file), since it's opaque to the | |
| 25 // outside world. But we need to define it before our (internal-only) functions | |
| 26 // that use it. | |
| 27 struct ChannelInfo { | |
| 28 ChannelInfo() {} | |
| 29 ~ChannelInfo() {} | |
| 30 | |
| 31 scoped_refptr<system::Channel> channel; | |
| 32 | |
| 33 // May be null, in which case |DestroyChannelOnIOThread()| must be used (from | |
| 34 // the IO thread), instead of |DestroyChannel()|. | |
| 35 scoped_refptr<base::TaskRunner> io_thread_task_runner; | |
| 36 }; | |
| 37 | |
| 38 namespace { | |
| 39 | |
| 40 // Helper for |CreateChannel...()|. (Note: May return null for some failures.) | |
| 41 scoped_refptr<system::Channel> MakeChannel( | |
| 42 system::Core* core, | |
| 43 ScopedPlatformHandle platform_handle, | |
| 44 scoped_refptr<system::ChannelEndpoint> channel_endpoint) { | |
| 45 DCHECK(platform_handle.is_valid()); | |
| 46 | |
| 47 // Create and initialize a |system::Channel|. | |
| 48 scoped_refptr<system::Channel> channel = | |
| 49 new system::Channel(core->platform_support()); | |
| 50 if (!channel->Init(system::RawChannel::Create(platform_handle.Pass()))) { | |
| 51 // This is very unusual (e.g., maybe |platform_handle| was invalid or we | |
| 52 // reached some system resource limit). | |
| 53 LOG(ERROR) << "Channel::Init() failed"; | |
| 54 // Return null, since |Shutdown()| shouldn't be called in this case. | |
| 55 return scoped_refptr<system::Channel>(); | |
| 56 } | |
| 57 // Once |Init()| has succeeded, we have to return |channel| (since | |
| 58 // |Shutdown()| will have to be called on it). | |
| 59 | |
| 60 // Attach the endpoint. | |
| 61 system::MessageInTransit::EndpointId endpoint_id = | |
| 62 channel->AttachEndpoint(channel_endpoint); | |
| 63 if (endpoint_id == system::MessageInTransit::kInvalidEndpointId) { | |
| 64 // This means that, e.g., the other endpoint of the message pipe was closed | |
| 65 // first. But it's not necessarily an error per se. | |
| 66 DVLOG(2) << "Channel::AttachEndpoint() failed"; | |
| 67 return channel; | |
| 68 } | |
| 69 CHECK_EQ(endpoint_id, system::Channel::kBootstrapEndpointId); | |
| 70 | |
| 71 if (!channel->RunMessagePipeEndpoint(system::Channel::kBootstrapEndpointId, | |
| 72 system::Channel::kBootstrapEndpointId)) { | |
| 73 // Currently, there's no reason for this to fail. | |
| 74 NOTREACHED() << "Channel::RunMessagePipeEndpoint() failed"; | |
| 75 return channel; | |
| 76 } | |
| 77 | |
| 78 return channel; | |
| 79 } | |
| 80 | |
| 81 void CreateChannelHelper( | |
| 82 system::Core* core, | |
| 83 ScopedPlatformHandle platform_handle, | |
| 84 scoped_ptr<ChannelInfo> channel_info, | |
| 85 scoped_refptr<system::ChannelEndpoint> channel_endpoint, | |
| 86 DidCreateChannelCallback callback, | |
| 87 scoped_refptr<base::TaskRunner> callback_thread_task_runner) { | |
| 88 channel_info->channel = | |
| 89 MakeChannel(core, platform_handle.Pass(), channel_endpoint); | |
| 90 | |
| 91 // Hand the channel back to the embedder. | |
| 92 if (callback_thread_task_runner.get()) { | |
| 93 callback_thread_task_runner->PostTask( | |
| 94 FROM_HERE, base::Bind(callback, channel_info.release())); | |
| 95 } else { | |
| 96 callback.Run(channel_info.release()); | |
| 97 } | |
| 98 } | |
| 99 | |
| 100 } // namespace | |
| 101 | |
| 102 void Init(scoped_ptr<PlatformSupport> platform_support) { | |
| 103 system::entrypoints::SetCore(new system::Core(platform_support.Pass())); | |
| 104 } | |
| 105 | |
| 106 // TODO(vtl): Write tests for this. | |
| 107 ScopedMessagePipeHandle CreateChannelOnIOThread( | |
| 108 ScopedPlatformHandle platform_handle, | |
| 109 ChannelInfo** channel_info) { | |
| 110 DCHECK(platform_handle.is_valid()); | |
| 111 DCHECK(channel_info); | |
| 112 | |
| 113 scoped_refptr<system::ChannelEndpoint> channel_endpoint; | |
| 114 scoped_refptr<system::MessagePipeDispatcher> dispatcher = | |
| 115 system::MessagePipeDispatcher::CreateRemoteMessagePipe(&channel_endpoint); | |
| 116 | |
| 117 system::Core* core = system::entrypoints::GetCore(); | |
| 118 DCHECK(core); | |
| 119 ScopedMessagePipeHandle rv( | |
| 120 MessagePipeHandle(core->AddDispatcher(dispatcher))); | |
| 121 | |
| 122 *channel_info = new ChannelInfo(); | |
| 123 (*channel_info)->channel = | |
| 124 MakeChannel(core, platform_handle.Pass(), channel_endpoint); | |
| 125 | |
| 126 return rv.Pass(); | |
| 127 } | |
| 128 | |
| 129 ScopedMessagePipeHandle CreateChannel( | |
| 130 ScopedPlatformHandle platform_handle, | |
| 131 scoped_refptr<base::TaskRunner> io_thread_task_runner, | |
| 132 DidCreateChannelCallback callback, | |
| 133 scoped_refptr<base::TaskRunner> callback_thread_task_runner) { | |
| 134 DCHECK(platform_handle.is_valid()); | |
| 135 | |
| 136 scoped_refptr<system::ChannelEndpoint> channel_endpoint; | |
| 137 scoped_refptr<system::MessagePipeDispatcher> dispatcher = | |
| 138 system::MessagePipeDispatcher::CreateRemoteMessagePipe(&channel_endpoint); | |
| 139 | |
| 140 system::Core* core = system::entrypoints::GetCore(); | |
| 141 DCHECK(core); | |
| 142 ScopedMessagePipeHandle rv( | |
| 143 MessagePipeHandle(core->AddDispatcher(dispatcher))); | |
| 144 | |
| 145 scoped_ptr<ChannelInfo> channel_info(new ChannelInfo()); | |
| 146 channel_info->io_thread_task_runner = io_thread_task_runner; | |
| 147 | |
| 148 if (rv.is_valid()) { | |
| 149 io_thread_task_runner->PostTask(FROM_HERE, | |
| 150 base::Bind(&CreateChannelHelper, | |
| 151 base::Unretained(core), | |
| 152 base::Passed(&platform_handle), | |
| 153 base::Passed(&channel_info), | |
| 154 channel_endpoint, | |
| 155 callback, | |
| 156 callback_thread_task_runner)); | |
| 157 } else { | |
| 158 (callback_thread_task_runner.get() ? callback_thread_task_runner | |
| 159 : io_thread_task_runner) | |
| 160 ->PostTask(FROM_HERE, base::Bind(callback, channel_info.release())); | |
| 161 } | |
| 162 | |
| 163 return rv.Pass(); | |
| 164 } | |
| 165 | |
| 166 void DestroyChannelOnIOThread(ChannelInfo* channel_info) { | |
| 167 DCHECK(channel_info); | |
| 168 if (!channel_info->channel.get()) { | |
| 169 // Presumably, |Init()| on the channel failed. | |
| 170 return; | |
| 171 } | |
| 172 | |
| 173 channel_info->channel->Shutdown(); | |
| 174 delete channel_info; | |
| 175 } | |
| 176 | |
| 177 // TODO(vtl): Write tests for this. | |
| 178 void DestroyChannel(ChannelInfo* channel_info) { | |
| 179 DCHECK(channel_info); | |
| 180 DCHECK(channel_info->io_thread_task_runner.get()); | |
| 181 | |
| 182 if (!channel_info->channel.get()) { | |
| 183 // Presumably, |Init()| on the channel failed. | |
| 184 return; | |
| 185 } | |
| 186 | |
| 187 channel_info->channel->WillShutdownSoon(); | |
| 188 channel_info->io_thread_task_runner->PostTask( | |
| 189 FROM_HERE, base::Bind(&DestroyChannelOnIOThread, channel_info)); | |
| 190 } | |
| 191 | |
| 192 void WillDestroyChannelSoon(ChannelInfo* channel_info) { | |
| 193 DCHECK(channel_info); | |
| 194 channel_info->channel->WillShutdownSoon(); | |
| 195 } | |
| 196 | |
| 197 MojoResult CreatePlatformHandleWrapper( | |
| 198 ScopedPlatformHandle platform_handle, | |
| 199 MojoHandle* platform_handle_wrapper_handle) { | |
| 200 DCHECK(platform_handle_wrapper_handle); | |
| 201 | |
| 202 scoped_refptr<system::Dispatcher> dispatcher( | |
| 203 new system::PlatformHandleDispatcher(platform_handle.Pass())); | |
| 204 | |
| 205 system::Core* core = system::entrypoints::GetCore(); | |
| 206 DCHECK(core); | |
| 207 MojoHandle h = core->AddDispatcher(dispatcher); | |
| 208 if (h == MOJO_HANDLE_INVALID) { | |
| 209 LOG(ERROR) << "Handle table full"; | |
| 210 dispatcher->Close(); | |
| 211 return MOJO_RESULT_RESOURCE_EXHAUSTED; | |
| 212 } | |
| 213 | |
| 214 *platform_handle_wrapper_handle = h; | |
| 215 return MOJO_RESULT_OK; | |
| 216 } | |
| 217 | |
| 218 MojoResult PassWrappedPlatformHandle(MojoHandle platform_handle_wrapper_handle, | |
| 219 ScopedPlatformHandle* platform_handle) { | |
| 220 DCHECK(platform_handle); | |
| 221 | |
| 222 system::Core* core = system::entrypoints::GetCore(); | |
| 223 DCHECK(core); | |
| 224 scoped_refptr<system::Dispatcher> dispatcher( | |
| 225 core->GetDispatcher(platform_handle_wrapper_handle)); | |
| 226 if (!dispatcher.get()) | |
| 227 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 228 | |
| 229 if (dispatcher->GetType() != system::Dispatcher::kTypePlatformHandle) | |
| 230 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 231 | |
| 232 *platform_handle = | |
| 233 static_cast<system::PlatformHandleDispatcher*>(dispatcher.get()) | |
| 234 ->PassPlatformHandle() | |
| 235 .Pass(); | |
| 236 return MOJO_RESULT_OK; | |
| 237 } | |
| 238 | |
| 239 } // namespace embedder | |
| 240 } // namespace mojo | |
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Chromium Code Reviews
Issue 621153003:
Move mojo edk into mojo/edk (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master