| OLD | NEW |
|---|
| (Empty) |
| 1 // Copyright 2013 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 "third_party/mojo/src/mojo/edk/system/dispatcher.h" | |
| 6 | |
| 7 #include "base/logging.h" | |
| 8 #include "third_party/mojo/src/mojo/edk/system/configuration.h" | |
| 9 #include "third_party/mojo/src/mojo/edk/system/data_pipe_consumer_dispatcher.h" | |
| 10 #include "third_party/mojo/src/mojo/edk/system/data_pipe_producer_dispatcher.h" | |
| 11 #include "third_party/mojo/src/mojo/edk/system/message_pipe_dispatcher.h" | |
| 12 #include "third_party/mojo/src/mojo/edk/system/platform_handle_dispatcher.h" | |
| 13 #include "third_party/mojo/src/mojo/edk/system/shared_buffer_dispatcher.h" | |
| 14 | |
| 15 namespace mojo { | |
| 16 namespace system { | |
| 17 | |
| 18 namespace test { | |
| 19 | |
| 20 // TODO(vtl): Maybe this should be defined in a test-only file instead. | |
| 21 DispatcherTransport DispatcherTryStartTransport(Dispatcher* dispatcher) { | |
| 22 return Dispatcher::HandleTableAccess::TryStartTransport(dispatcher); | |
| 23 } | |
| 24 | |
| 25 } // namespace test | |
| 26 | |
| 27 // Dispatcher ------------------------------------------------------------------ | |
| 28 | |
| 29 // TODO(vtl): The thread-safety analyzer isn't smart enough to deal with the | |
| 30 // fact that we give up if |TryLock()| fails. | |
| 31 // static | |
| 32 DispatcherTransport Dispatcher::HandleTableAccess::TryStartTransport( | |
| 33 Dispatcher* dispatcher) MOJO_NO_THREAD_SAFETY_ANALYSIS { | |
| 34 DCHECK(dispatcher); | |
| 35 | |
| 36 if (!dispatcher->mutex_.TryLock()) | |
| 37 return DispatcherTransport(); | |
| 38 | |
| 39 // We shouldn't race with things that close dispatchers, since closing can | |
| 40 // only take place either under |handle_table_mutex_| or when the handle is | |
| 41 // marked as busy. | |
| 42 DCHECK(!dispatcher->is_closed_); | |
| 43 | |
| 44 return DispatcherTransport(dispatcher); | |
| 45 } | |
| 46 | |
| 47 // static | |
| 48 void Dispatcher::TransportDataAccess::StartSerialize( | |
| 49 Dispatcher* dispatcher, | |
| 50 Channel* channel, | |
| 51 size_t* max_size, | |
| 52 size_t* max_platform_handles) { | |
| 53 DCHECK(dispatcher); | |
| 54 dispatcher->StartSerialize(channel, max_size, max_platform_handles); | |
| 55 } | |
| 56 | |
| 57 // static | |
| 58 bool Dispatcher::TransportDataAccess::EndSerializeAndClose( | |
| 59 Dispatcher* dispatcher, | |
| 60 Channel* channel, | |
| 61 void* destination, | |
| 62 size_t* actual_size, | |
| 63 embedder::PlatformHandleVector* platform_handles) { | |
| 64 DCHECK(dispatcher); | |
| 65 return dispatcher->EndSerializeAndClose(channel, destination, actual_size, | |
| 66 platform_handles); | |
| 67 } | |
| 68 | |
| 69 // static | |
| 70 scoped_refptr<Dispatcher> Dispatcher::TransportDataAccess::Deserialize( | |
| 71 Channel* channel, | |
| 72 int32_t type, | |
| 73 const void* source, | |
| 74 size_t size, | |
| 75 embedder::PlatformHandleVector* platform_handles) { | |
| 76 switch (static_cast<Dispatcher::Type>(type)) { | |
| 77 case Type::WAIT_SET: | |
| 78 case Type::UNKNOWN: | |
| 79 DVLOG(2) << "Deserializing invalid handle"; | |
| 80 return nullptr; | |
| 81 case Type::MESSAGE_PIPE: | |
| 82 return scoped_refptr<Dispatcher>( | |
| 83 MessagePipeDispatcher::Deserialize(channel, source, size)); | |
| 84 case Type::DATA_PIPE_PRODUCER: | |
| 85 return scoped_refptr<Dispatcher>( | |
| 86 DataPipeProducerDispatcher::Deserialize(channel, source, size)); | |
| 87 case Type::DATA_PIPE_CONSUMER: | |
| 88 return scoped_refptr<Dispatcher>( | |
| 89 DataPipeConsumerDispatcher::Deserialize(channel, source, size)); | |
| 90 case Type::SHARED_BUFFER: | |
| 91 return scoped_refptr<Dispatcher>(SharedBufferDispatcher::Deserialize( | |
| 92 channel, source, size, platform_handles)); | |
| 93 case Type::PLATFORM_HANDLE: | |
| 94 return scoped_refptr<Dispatcher>(PlatformHandleDispatcher::Deserialize( | |
| 95 channel, source, size, platform_handles)); | |
| 96 } | |
| 97 LOG(WARNING) << "Unknown dispatcher type " << type; | |
| 98 return nullptr; | |
| 99 } | |
| 100 | |
| 101 MojoResult Dispatcher::Close() { | |
| 102 MutexLocker locker(&mutex_); | |
| 103 if (is_closed_) | |
| 104 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 105 | |
| 106 CloseNoLock(); | |
| 107 return MOJO_RESULT_OK; | |
| 108 } | |
| 109 | |
| 110 MojoResult Dispatcher::WriteMessage( | |
| 111 UserPointer<const void> bytes, | |
| 112 uint32_t num_bytes, | |
| 113 std::vector<DispatcherTransport>* transports, | |
| 114 MojoWriteMessageFlags flags) { | |
| 115 DCHECK(!transports || | |
| 116 (transports->size() > 0 && | |
| 117 transports->size() < GetConfiguration().max_message_num_handles)); | |
| 118 | |
| 119 MutexLocker locker(&mutex_); | |
| 120 if (is_closed_) | |
| 121 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 122 | |
| 123 return WriteMessageImplNoLock(bytes, num_bytes, transports, flags); | |
| 124 } | |
| 125 | |
| 126 MojoResult Dispatcher::ReadMessage(UserPointer<void> bytes, | |
| 127 UserPointer<uint32_t> num_bytes, | |
| 128 DispatcherVector* dispatchers, | |
| 129 uint32_t* num_dispatchers, | |
| 130 MojoReadMessageFlags flags) { | |
| 131 DCHECK(!num_dispatchers || *num_dispatchers == 0 || | |
| 132 (dispatchers && dispatchers->empty())); | |
| 133 | |
| 134 MutexLocker locker(&mutex_); | |
| 135 if (is_closed_) | |
| 136 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 137 | |
| 138 return ReadMessageImplNoLock(bytes, num_bytes, dispatchers, num_dispatchers, | |
| 139 flags); | |
| 140 } | |
| 141 | |
| 142 MojoResult Dispatcher::WriteData(UserPointer<const void> elements, | |
| 143 UserPointer<uint32_t> num_bytes, | |
| 144 MojoWriteDataFlags flags) { | |
| 145 MutexLocker locker(&mutex_); | |
| 146 if (is_closed_) | |
| 147 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 148 | |
| 149 return WriteDataImplNoLock(elements, num_bytes, flags); | |
| 150 } | |
| 151 | |
| 152 MojoResult Dispatcher::BeginWriteData(UserPointer<void*> buffer, | |
| 153 UserPointer<uint32_t> buffer_num_bytes, | |
| 154 MojoWriteDataFlags flags) { | |
| 155 MutexLocker locker(&mutex_); | |
| 156 if (is_closed_) | |
| 157 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 158 | |
| 159 return BeginWriteDataImplNoLock(buffer, buffer_num_bytes, flags); | |
| 160 } | |
| 161 | |
| 162 MojoResult Dispatcher::EndWriteData(uint32_t num_bytes_written) { | |
| 163 MutexLocker locker(&mutex_); | |
| 164 if (is_closed_) | |
| 165 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 166 | |
| 167 return EndWriteDataImplNoLock(num_bytes_written); | |
| 168 } | |
| 169 | |
| 170 MojoResult Dispatcher::ReadData(UserPointer<void> elements, | |
| 171 UserPointer<uint32_t> num_bytes, | |
| 172 MojoReadDataFlags flags) { | |
| 173 MutexLocker locker(&mutex_); | |
| 174 if (is_closed_) | |
| 175 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 176 | |
| 177 return ReadDataImplNoLock(elements, num_bytes, flags); | |
| 178 } | |
| 179 | |
| 180 MojoResult Dispatcher::BeginReadData(UserPointer<const void*> buffer, | |
| 181 UserPointer<uint32_t> buffer_num_bytes, | |
| 182 MojoReadDataFlags flags) { | |
| 183 MutexLocker locker(&mutex_); | |
| 184 if (is_closed_) | |
| 185 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 186 | |
| 187 return BeginReadDataImplNoLock(buffer, buffer_num_bytes, flags); | |
| 188 } | |
| 189 | |
| 190 MojoResult Dispatcher::EndReadData(uint32_t num_bytes_read) { | |
| 191 MutexLocker locker(&mutex_); | |
| 192 if (is_closed_) | |
| 193 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 194 | |
| 195 return EndReadDataImplNoLock(num_bytes_read); | |
| 196 } | |
| 197 | |
| 198 MojoResult Dispatcher::DuplicateBufferHandle( | |
| 199 UserPointer<const MojoDuplicateBufferHandleOptions> options, | |
| 200 scoped_refptr<Dispatcher>* new_dispatcher) { | |
| 201 MutexLocker locker(&mutex_); | |
| 202 if (is_closed_) | |
| 203 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 204 | |
| 205 return DuplicateBufferHandleImplNoLock(options, new_dispatcher); | |
| 206 } | |
| 207 | |
| 208 MojoResult Dispatcher::MapBuffer( | |
| 209 uint64_t offset, | |
| 210 uint64_t num_bytes, | |
| 211 MojoMapBufferFlags flags, | |
| 212 scoped_ptr<embedder::PlatformSharedBufferMapping>* mapping) { | |
| 213 MutexLocker locker(&mutex_); | |
| 214 if (is_closed_) | |
| 215 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 216 | |
| 217 return MapBufferImplNoLock(offset, num_bytes, flags, mapping); | |
| 218 } | |
| 219 | |
| 220 HandleSignalsState Dispatcher::GetHandleSignalsState() const { | |
| 221 MutexLocker locker(&mutex_); | |
| 222 if (is_closed_) | |
| 223 return HandleSignalsState(); | |
| 224 | |
| 225 return GetHandleSignalsStateImplNoLock(); | |
| 226 } | |
| 227 | |
| 228 MojoResult Dispatcher::AddAwakable(Awakable* awakable, | |
| 229 MojoHandleSignals signals, | |
| 230 uintptr_t context, | |
| 231 HandleSignalsState* signals_state) { | |
| 232 MutexLocker locker(&mutex_); | |
| 233 if (is_closed_) { | |
| 234 if (signals_state) | |
| 235 *signals_state = HandleSignalsState(); | |
| 236 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 237 } | |
| 238 | |
| 239 return AddAwakableImplNoLock(awakable, signals, context, signals_state); | |
| 240 } | |
| 241 | |
| 242 void Dispatcher::RemoveAwakable(Awakable* awakable, | |
| 243 HandleSignalsState* handle_signals_state) { | |
| 244 MutexLocker locker(&mutex_); | |
| 245 if (is_closed_) { | |
| 246 if (handle_signals_state) | |
| 247 *handle_signals_state = HandleSignalsState(); | |
| 248 return; | |
| 249 } | |
| 250 | |
| 251 RemoveAwakableImplNoLock(awakable, handle_signals_state); | |
| 252 } | |
| 253 | |
| 254 MojoResult Dispatcher::AddWaitingDispatcher( | |
| 255 const scoped_refptr<Dispatcher>& dispatcher, | |
| 256 MojoHandleSignals signals, | |
| 257 uintptr_t context) { | |
| 258 MutexLocker locker(&mutex_); | |
| 259 if (is_closed_) | |
| 260 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 261 | |
| 262 return AddWaitingDispatcherImplNoLock(dispatcher, signals, context); | |
| 263 } | |
| 264 | |
| 265 MojoResult Dispatcher::RemoveWaitingDispatcher( | |
| 266 const scoped_refptr<Dispatcher>& dispatcher) { | |
| 267 MutexLocker locker(&mutex_); | |
| 268 if (is_closed_) | |
| 269 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 270 | |
| 271 return RemoveWaitingDispatcherImplNoLock(dispatcher); | |
| 272 } | |
| 273 | |
| 274 MojoResult Dispatcher::GetReadyDispatchers(UserPointer<uint32_t> count, | |
| 275 DispatcherVector* dispatchers, | |
| 276 UserPointer<MojoResult> results, | |
| 277 UserPointer<uintptr_t> contexts) { | |
| 278 MutexLocker locker(&mutex_); | |
| 279 if (is_closed_) | |
| 280 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 281 | |
| 282 return GetReadyDispatchersImplNoLock(count, dispatchers, results, contexts); | |
| 283 } | |
| 284 | |
| 285 Dispatcher::Dispatcher() : is_closed_(false) { | |
| 286 } | |
| 287 | |
| 288 Dispatcher::~Dispatcher() { | |
| 289 // Make sure that |Close()| was called. | |
| 290 DCHECK(is_closed_); | |
| 291 } | |
| 292 | |
| 293 void Dispatcher::CancelAllAwakablesNoLock() { | |
| 294 mutex_.AssertHeld(); | |
| 295 DCHECK(is_closed_); | |
| 296 // By default, waiting isn't supported. Only dispatchers that can be waited on | |
| 297 // will do something nontrivial. | |
| 298 } | |
| 299 | |
| 300 void Dispatcher::CloseImplNoLock() { | |
| 301 mutex_.AssertHeld(); | |
| 302 DCHECK(is_closed_); | |
| 303 // This may not need to do anything. Dispatchers should override this to do | |
| 304 // any actual close-time cleanup necessary. | |
| 305 } | |
| 306 | |
| 307 MojoResult Dispatcher::WriteMessageImplNoLock( | |
| 308 UserPointer<const void> /*bytes*/, | |
| 309 uint32_t /*num_bytes*/, | |
| 310 std::vector<DispatcherTransport>* /*transports*/, | |
| 311 MojoWriteMessageFlags /*flags*/) { | |
| 312 mutex_.AssertHeld(); | |
| 313 DCHECK(!is_closed_); | |
| 314 // By default, not supported. Only needed for message pipe dispatchers. | |
| 315 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 316 } | |
| 317 | |
| 318 MojoResult Dispatcher::ReadMessageImplNoLock( | |
| 319 UserPointer<void> /*bytes*/, | |
| 320 UserPointer<uint32_t> /*num_bytes*/, | |
| 321 DispatcherVector* /*dispatchers*/, | |
| 322 uint32_t* /*num_dispatchers*/, | |
| 323 MojoReadMessageFlags /*flags*/) { | |
| 324 mutex_.AssertHeld(); | |
| 325 DCHECK(!is_closed_); | |
| 326 // By default, not supported. Only needed for message pipe dispatchers. | |
| 327 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 328 } | |
| 329 | |
| 330 MojoResult Dispatcher::WriteDataImplNoLock(UserPointer<const void> /*elements*/, | |
| 331 UserPointer<uint32_t> /*num_bytes*/, | |
| 332 MojoWriteDataFlags /*flags*/) { | |
| 333 mutex_.AssertHeld(); | |
| 334 DCHECK(!is_closed_); | |
| 335 // By default, not supported. Only needed for data pipe dispatchers. | |
| 336 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 337 } | |
| 338 | |
| 339 MojoResult Dispatcher::BeginWriteDataImplNoLock( | |
| 340 UserPointer<void*> /*buffer*/, | |
| 341 UserPointer<uint32_t> /*buffer_num_bytes*/, | |
| 342 MojoWriteDataFlags /*flags*/) { | |
| 343 mutex_.AssertHeld(); | |
| 344 DCHECK(!is_closed_); | |
| 345 // By default, not supported. Only needed for data pipe dispatchers. | |
| 346 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 347 } | |
| 348 | |
| 349 MojoResult Dispatcher::EndWriteDataImplNoLock(uint32_t /*num_bytes_written*/) { | |
| 350 mutex_.AssertHeld(); | |
| 351 DCHECK(!is_closed_); | |
| 352 // By default, not supported. Only needed for data pipe dispatchers. | |
| 353 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 354 } | |
| 355 | |
| 356 MojoResult Dispatcher::ReadDataImplNoLock(UserPointer<void> /*elements*/, | |
| 357 UserPointer<uint32_t> /*num_bytes*/, | |
| 358 MojoReadDataFlags /*flags*/) { | |
| 359 mutex_.AssertHeld(); | |
| 360 DCHECK(!is_closed_); | |
| 361 // By default, not supported. Only needed for data pipe dispatchers. | |
| 362 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 363 } | |
| 364 | |
| 365 MojoResult Dispatcher::BeginReadDataImplNoLock( | |
| 366 UserPointer<const void*> /*buffer*/, | |
| 367 UserPointer<uint32_t> /*buffer_num_bytes*/, | |
| 368 MojoReadDataFlags /*flags*/) { | |
| 369 mutex_.AssertHeld(); | |
| 370 DCHECK(!is_closed_); | |
| 371 // By default, not supported. Only needed for data pipe dispatchers. | |
| 372 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 373 } | |
| 374 | |
| 375 MojoResult Dispatcher::EndReadDataImplNoLock(uint32_t /*num_bytes_read*/) { | |
| 376 mutex_.AssertHeld(); | |
| 377 DCHECK(!is_closed_); | |
| 378 // By default, not supported. Only needed for data pipe dispatchers. | |
| 379 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 380 } | |
| 381 | |
| 382 MojoResult Dispatcher::DuplicateBufferHandleImplNoLock( | |
| 383 UserPointer<const MojoDuplicateBufferHandleOptions> /*options*/, | |
| 384 scoped_refptr<Dispatcher>* /*new_dispatcher*/) { | |
| 385 mutex_.AssertHeld(); | |
| 386 DCHECK(!is_closed_); | |
| 387 // By default, not supported. Only needed for buffer dispatchers. | |
| 388 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 389 } | |
| 390 | |
| 391 MojoResult Dispatcher::MapBufferImplNoLock( | |
| 392 uint64_t /*offset*/, | |
| 393 uint64_t /*num_bytes*/, | |
| 394 MojoMapBufferFlags /*flags*/, | |
| 395 scoped_ptr<embedder::PlatformSharedBufferMapping>* /*mapping*/) { | |
| 396 mutex_.AssertHeld(); | |
| 397 DCHECK(!is_closed_); | |
| 398 // By default, not supported. Only needed for buffer dispatchers. | |
| 399 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 400 } | |
| 401 | |
| 402 HandleSignalsState Dispatcher::GetHandleSignalsStateImplNoLock() const { | |
| 403 mutex_.AssertHeld(); | |
| 404 DCHECK(!is_closed_); | |
| 405 // By default, waiting isn't supported. Only dispatchers that can be waited on | |
| 406 // will do something nontrivial. | |
| 407 return HandleSignalsState(); | |
| 408 } | |
| 409 | |
| 410 MojoResult Dispatcher::AddAwakableImplNoLock( | |
| 411 Awakable* /*awakable*/, | |
| 412 MojoHandleSignals /*signals*/, | |
| 413 uintptr_t /*context*/, | |
| 414 HandleSignalsState* signals_state) { | |
| 415 mutex_.AssertHeld(); | |
| 416 DCHECK(!is_closed_); | |
| 417 // By default, waiting isn't supported. Only dispatchers that can be waited on | |
| 418 // will do something nontrivial. | |
| 419 if (signals_state) | |
| 420 *signals_state = HandleSignalsState(); | |
| 421 return MOJO_RESULT_FAILED_PRECONDITION; | |
| 422 } | |
| 423 | |
| 424 MojoResult Dispatcher::AddWaitingDispatcherImplNoLock( | |
| 425 const scoped_refptr<Dispatcher>& /*dispatcher*/, | |
| 426 MojoHandleSignals /*signals*/, | |
| 427 uintptr_t /*context*/) { | |
| 428 mutex_.AssertHeld(); | |
| 429 DCHECK(!is_closed_); | |
| 430 // By default, not supported. Only needed for wait set dispatchers. | |
| 431 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 432 } | |
| 433 | |
| 434 MojoResult Dispatcher::RemoveWaitingDispatcherImplNoLock( | |
| 435 const scoped_refptr<Dispatcher>& /*dispatcher*/) { | |
| 436 mutex_.AssertHeld(); | |
| 437 DCHECK(!is_closed_); | |
| 438 // By default, not supported. Only needed for wait set dispatchers. | |
| 439 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 440 } | |
| 441 | |
| 442 MojoResult Dispatcher::GetReadyDispatchersImplNoLock( | |
| 443 UserPointer<uint32_t> /*count*/, | |
| 444 DispatcherVector* /*dispatchers*/, | |
| 445 UserPointer<MojoResult> /*results*/, | |
| 446 UserPointer<uintptr_t> /*contexts*/) { | |
| 447 mutex_.AssertHeld(); | |
| 448 DCHECK(!is_closed_); | |
| 449 // By default, not supported. Only needed for wait set dispatchers. | |
| 450 return MOJO_RESULT_INVALID_ARGUMENT; | |
| 451 } | |
| 452 | |
| 453 void Dispatcher::RemoveAwakableImplNoLock(Awakable* /*awakable*/, | |
| 454 HandleSignalsState* signals_state) { | |
| 455 mutex_.AssertHeld(); | |
| 456 DCHECK(!is_closed_); | |
| 457 // By default, waiting isn't supported. Only dispatchers that can be waited on | |
| 458 // will do something nontrivial. | |
| 459 if (signals_state) | |
| 460 *signals_state = HandleSignalsState(); | |
| 461 } | |
| 462 | |
| 463 void Dispatcher::StartSerializeImplNoLock(Channel* /*channel*/, | |
| 464 size_t* max_size, | |
| 465 size_t* max_platform_handles) { | |
| 466 DCHECK(HasOneRef()); // Only one ref => no need to take the lock. | |
| 467 DCHECK(!is_closed_); | |
| 468 *max_size = 0; | |
| 469 *max_platform_handles = 0; | |
| 470 } | |
| 471 | |
| 472 bool Dispatcher::EndSerializeAndCloseImplNoLock( | |
| 473 Channel* /*channel*/, | |
| 474 void* /*destination*/, | |
| 475 size_t* /*actual_size*/, | |
| 476 embedder::PlatformHandleVector* /*platform_handles*/) { | |
| 477 DCHECK(HasOneRef()); // Only one ref => no need to take the lock. | |
| 478 DCHECK(is_closed_); | |
| 479 // By default, serializing isn't supported, so just close. | |
| 480 CloseImplNoLock(); | |
| 481 return false; | |
| 482 } | |
| 483 | |
| 484 bool Dispatcher::IsBusyNoLock() const { | |
| 485 mutex_.AssertHeld(); | |
| 486 DCHECK(!is_closed_); | |
| 487 // Most dispatchers support only "atomic" operations, so they are never busy | |
| 488 // (in this sense). | |
| 489 return false; | |
| 490 } | |
| 491 | |
| 492 void Dispatcher::CloseNoLock() { | |
| 493 mutex_.AssertHeld(); | |
| 494 DCHECK(!is_closed_); | |
| 495 | |
| 496 is_closed_ = true; | |
| 497 CancelAllAwakablesNoLock(); | |
| 498 CloseImplNoLock(); | |
| 499 } | |
| 500 | |
| 501 scoped_refptr<Dispatcher> | |
| 502 Dispatcher::CreateEquivalentDispatcherAndCloseNoLock() { | |
| 503 mutex_.AssertHeld(); | |
| 504 DCHECK(!is_closed_); | |
| 505 | |
| 506 is_closed_ = true; | |
| 507 CancelAllAwakablesNoLock(); | |
| 508 return CreateEquivalentDispatcherAndCloseImplNoLock(); | |
| 509 } | |
| 510 | |
| 511 void Dispatcher::StartSerialize(Channel* channel, | |
| 512 size_t* max_size, | |
| 513 size_t* max_platform_handles) { | |
| 514 DCHECK(channel); | |
| 515 DCHECK(max_size); | |
| 516 DCHECK(max_platform_handles); | |
| 517 DCHECK(HasOneRef()); // Only one ref => no need to take the lock. | |
| 518 DCHECK(!is_closed_); | |
| 519 StartSerializeImplNoLock(channel, max_size, max_platform_handles); | |
| 520 } | |
| 521 | |
| 522 bool Dispatcher::EndSerializeAndClose( | |
| 523 Channel* channel, | |
| 524 void* destination, | |
| 525 size_t* actual_size, | |
| 526 embedder::PlatformHandleVector* platform_handles) { | |
| 527 DCHECK(channel); | |
| 528 DCHECK(actual_size); | |
| 529 DCHECK(HasOneRef()); // Only one ref => no need to take the lock. | |
| 530 DCHECK(!is_closed_); | |
| 531 | |
| 532 // Like other |...Close()| methods, we mark ourselves as closed before calling | |
| 533 // the impl. But there's no need to cancel waiters: we shouldn't have any (and | |
| 534 // shouldn't be in |Core|'s handle table. | |
| 535 is_closed_ = true; | |
| 536 | |
| 537 #if !defined(NDEBUG) | |
| 538 // See the comment above |EndSerializeAndCloseImplNoLock()|. In brief: Locking | |
| 539 // isn't actually needed, but we need to satisfy assertions (which we don't | |
| 540 // want to remove or weaken). | |
| 541 MutexLocker locker(&mutex_); | |
| 542 #endif | |
| 543 | |
| 544 return EndSerializeAndCloseImplNoLock(channel, destination, actual_size, | |
| 545 platform_handles); | |
| 546 } | |
| 547 | |
| 548 // DispatcherTransport --------------------------------------------------------- | |
| 549 | |
| 550 void DispatcherTransport::End() { | |
| 551 DCHECK(dispatcher_); | |
| 552 dispatcher_->mutex_.Unlock(); | |
| 553 dispatcher_ = nullptr; | |
| 554 } | |
| 555 | |
| 556 } // namespace system | |
| 557 } // namespace mojo | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 1676913002:
[mojo] Delete third_party/mojo (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master