henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2004 The WebRTC Project Authors. All rights reserved. |
| 3 | * |
| 4 | * Use of this source code is governed by a BSD-style license |
| 5 | * that can be found in the LICENSE file in the root of the source |
| 6 | * tree. An additional intellectual property rights grant can be found |
| 7 | * in the file PATENTS. All contributing project authors may |
| 8 | * be found in the AUTHORS file in the root of the source tree. |
| 9 | */ |
| 10 | |
| 11 | #include "webrtc/base/thread.h" |
| 12 | |
| 13 | #ifndef __has_feature |
| 14 | #define __has_feature(x) 0 // Compatibility with non-clang or LLVM compilers. |
| 15 | #endif // __has_feature |
| 16 | |
| 17 | #if defined(WEBRTC_WIN) |
| 18 | #include <comdef.h> |
| 19 | #elif defined(WEBRTC_POSIX) |
| 20 | #include <time.h> |
| 21 | #endif |
| 22 | |
| 23 | #include "webrtc/base/common.h" |
| 24 | #include "webrtc/base/logging.h" |
| 25 | #include "webrtc/base/stringutils.h" |
| 26 | #include "webrtc/base/timeutils.h" |
| 27 | |
| 28 | #if !__has_feature(objc_arc) && (defined(WEBRTC_MAC)) |
| 29 | #include "webrtc/base/maccocoathreadhelper.h" |
| 30 | #include "webrtc/base/scoped_autorelease_pool.h" |
| 31 | #endif |
| 32 | |
| 33 | namespace rtc { |
| 34 | |
| 35 | ThreadManager* ThreadManager::Instance() { |
| 36 | LIBJINGLE_DEFINE_STATIC_LOCAL(ThreadManager, thread_manager, ()); |
| 37 | return &thread_manager; |
| 38 | } |
| 39 | |
| 40 | // static |
| 41 | Thread* Thread::Current() { |
| 42 | return ThreadManager::Instance()->CurrentThread(); |
| 43 | } |
| 44 | |
| 45 | #if defined(WEBRTC_POSIX) |
| 46 | ThreadManager::ThreadManager() { |
| 47 | pthread_key_create(&key_, NULL); |
| 48 | #ifndef NO_MAIN_THREAD_WRAPPING |
| 49 | WrapCurrentThread(); |
| 50 | #endif |
| 51 | #if !__has_feature(objc_arc) && (defined(WEBRTC_MAC)) |
| 52 | // Under Automatic Reference Counting (ARC), you cannot use autorelease pools |
| 53 | // directly. Instead, you use @autoreleasepool blocks instead. Also, we are |
| 54 | // maintaining thread safety using immutability within context of GCD dispatch |
| 55 | // queues in this case. |
| 56 | InitCocoaMultiThreading(); |
| 57 | #endif |
| 58 | } |
| 59 | |
| 60 | ThreadManager::~ThreadManager() { |
| 61 | #if __has_feature(objc_arc) |
| 62 | @autoreleasepool |
| 63 | #elif defined(WEBRTC_MAC) |
| 64 | // This is called during exit, at which point apparently no NSAutoreleasePools |
| 65 | // are available; but we might still need them to do cleanup (or we get the |
| 66 | // "no autoreleasepool in place, just leaking" warning when exiting). |
| 67 | ScopedAutoreleasePool pool; |
| 68 | #endif |
| 69 | { |
| 70 | UnwrapCurrentThread(); |
| 71 | pthread_key_delete(key_); |
| 72 | } |
| 73 | } |
| 74 | |
| 75 | Thread *ThreadManager::CurrentThread() { |
| 76 | return static_cast<Thread *>(pthread_getspecific(key_)); |
| 77 | } |
| 78 | |
| 79 | void ThreadManager::SetCurrentThread(Thread *thread) { |
| 80 | pthread_setspecific(key_, thread); |
| 81 | } |
| 82 | #endif |
| 83 | |
| 84 | #if defined(WEBRTC_WIN) |
| 85 | ThreadManager::ThreadManager() { |
| 86 | key_ = TlsAlloc(); |
| 87 | #ifndef NO_MAIN_THREAD_WRAPPING |
| 88 | WrapCurrentThread(); |
| 89 | #endif |
| 90 | } |
| 91 | |
| 92 | ThreadManager::~ThreadManager() { |
| 93 | UnwrapCurrentThread(); |
| 94 | TlsFree(key_); |
| 95 | } |
| 96 | |
| 97 | Thread *ThreadManager::CurrentThread() { |
| 98 | return static_cast<Thread *>(TlsGetValue(key_)); |
| 99 | } |
| 100 | |
| 101 | void ThreadManager::SetCurrentThread(Thread *thread) { |
| 102 | TlsSetValue(key_, thread); |
| 103 | } |
| 104 | #endif |
| 105 | |
| 106 | Thread *ThreadManager::WrapCurrentThread() { |
| 107 | Thread* result = CurrentThread(); |
| 108 | if (NULL == result) { |
| 109 | result = new Thread(); |
| 110 | result->WrapCurrentWithThreadManager(this); |
| 111 | } |
| 112 | return result; |
| 113 | } |
| 114 | |
| 115 | void ThreadManager::UnwrapCurrentThread() { |
| 116 | Thread* t = CurrentThread(); |
| 117 | if (t && !(t->IsOwned())) { |
| 118 | t->UnwrapCurrent(); |
| 119 | delete t; |
| 120 | } |
| 121 | } |
| 122 | |
| 123 | struct ThreadInit { |
| 124 | Thread* thread; |
| 125 | Runnable* runnable; |
| 126 | }; |
| 127 | |
| 128 | Thread::Thread(SocketServer* ss) |
| 129 | : MessageQueue(ss), |
| 130 | priority_(PRIORITY_NORMAL), |
| 131 | started_(false), |
| 132 | #if defined(WEBRTC_WIN) |
| 133 | thread_(NULL), |
| 134 | thread_id_(0), |
| 135 | #endif |
| 136 | owned_(true), |
| 137 | delete_self_when_complete_(false) { |
| 138 | SetName("Thread", this); // default name |
| 139 | } |
| 140 | |
| 141 | Thread::~Thread() { |
| 142 | Stop(); |
| 143 | if (active_) |
| 144 | Clear(NULL); |
| 145 | } |
| 146 | |
| 147 | bool Thread::SleepMs(int milliseconds) { |
| 148 | #if defined(WEBRTC_WIN) |
| 149 | ::Sleep(milliseconds); |
| 150 | return true; |
| 151 | #else |
| 152 | // POSIX has both a usleep() and a nanosleep(), but the former is deprecated, |
| 153 | // so we use nanosleep() even though it has greater precision than necessary. |
| 154 | struct timespec ts; |
| 155 | ts.tv_sec = milliseconds / 1000; |
| 156 | ts.tv_nsec = (milliseconds % 1000) * 1000000; |
| 157 | int ret = nanosleep(&ts, NULL); |
| 158 | if (ret != 0) { |
| 159 | LOG_ERR(LS_WARNING) << "nanosleep() returning early"; |
| 160 | return false; |
| 161 | } |
| 162 | return true; |
| 163 | #endif |
| 164 | } |
| 165 | |
| 166 | bool Thread::SetName(const std::string& name, const void* obj) { |
| 167 | if (started_) return false; |
| 168 | name_ = name; |
| 169 | if (obj) { |
| 170 | char buf[16]; |
| 171 | sprintfn(buf, sizeof(buf), " 0x%p", obj); |
| 172 | name_ += buf; |
| 173 | } |
| 174 | return true; |
| 175 | } |
| 176 | |
| 177 | bool Thread::SetPriority(ThreadPriority priority) { |
| 178 | #if defined(WEBRTC_WIN) |
| 179 | if (started_) { |
| 180 | BOOL ret = FALSE; |
| 181 | if (priority == PRIORITY_NORMAL) { |
| 182 | ret = ::SetThreadPriority(thread_, THREAD_PRIORITY_NORMAL); |
| 183 | } else if (priority == PRIORITY_HIGH) { |
| 184 | ret = ::SetThreadPriority(thread_, THREAD_PRIORITY_HIGHEST); |
| 185 | } else if (priority == PRIORITY_ABOVE_NORMAL) { |
| 186 | ret = ::SetThreadPriority(thread_, THREAD_PRIORITY_ABOVE_NORMAL); |
| 187 | } else if (priority == PRIORITY_IDLE) { |
| 188 | ret = ::SetThreadPriority(thread_, THREAD_PRIORITY_IDLE); |
| 189 | } |
| 190 | if (!ret) { |
| 191 | return false; |
| 192 | } |
| 193 | } |
| 194 | priority_ = priority; |
| 195 | return true; |
| 196 | #else |
| 197 | // TODO: Implement for Linux/Mac if possible. |
| 198 | if (started_) return false; |
| 199 | priority_ = priority; |
| 200 | return true; |
| 201 | #endif |
| 202 | } |
| 203 | |
| 204 | bool Thread::Start(Runnable* runnable) { |
| 205 | ASSERT(owned_); |
| 206 | if (!owned_) return false; |
| 207 | ASSERT(!started_); |
| 208 | if (started_) return false; |
| 209 | |
| 210 | Restart(); // reset fStop_ if the thread is being restarted |
| 211 | |
| 212 | // Make sure that ThreadManager is created on the main thread before |
| 213 | // we start a new thread. |
| 214 | ThreadManager::Instance(); |
| 215 | |
| 216 | ThreadInit* init = new ThreadInit; |
| 217 | init->thread = this; |
| 218 | init->runnable = runnable; |
| 219 | #if defined(WEBRTC_WIN) |
| 220 | DWORD flags = 0; |
| 221 | if (priority_ != PRIORITY_NORMAL) { |
| 222 | flags = CREATE_SUSPENDED; |
| 223 | } |
| 224 | thread_ = CreateThread(NULL, 0, (LPTHREAD_START_ROUTINE)PreRun, init, flags, |
| 225 | &thread_id_); |
| 226 | if (thread_) { |
| 227 | started_ = true; |
| 228 | if (priority_ != PRIORITY_NORMAL) { |
| 229 | SetPriority(priority_); |
| 230 | ::ResumeThread(thread_); |
| 231 | } |
| 232 | } else { |
| 233 | return false; |
| 234 | } |
| 235 | #elif defined(WEBRTC_POSIX) |
| 236 | pthread_attr_t attr; |
| 237 | pthread_attr_init(&attr); |
| 238 | |
| 239 | // Thread priorities are not supported in NaCl. |
| 240 | #if !defined(__native_client__) |
| 241 | if (priority_ != PRIORITY_NORMAL) { |
| 242 | if (priority_ == PRIORITY_IDLE) { |
| 243 | // There is no POSIX-standard way to set a below-normal priority for an |
| 244 | // individual thread (only whole process), so let's not support it. |
| 245 | LOG(LS_WARNING) << "PRIORITY_IDLE not supported"; |
| 246 | } else { |
| 247 | // Set real-time round-robin policy. |
| 248 | if (pthread_attr_setschedpolicy(&attr, SCHED_RR) != 0) { |
| 249 | LOG(LS_ERROR) << "pthread_attr_setschedpolicy"; |
| 250 | } |
| 251 | struct sched_param param; |
| 252 | if (pthread_attr_getschedparam(&attr, ¶m) != 0) { |
| 253 | LOG(LS_ERROR) << "pthread_attr_getschedparam"; |
| 254 | } else { |
| 255 | // The numbers here are arbitrary. |
| 256 | if (priority_ == PRIORITY_HIGH) { |
| 257 | param.sched_priority = 6; // 6 = HIGH |
| 258 | } else { |
| 259 | ASSERT(priority_ == PRIORITY_ABOVE_NORMAL); |
| 260 | param.sched_priority = 4; // 4 = ABOVE_NORMAL |
| 261 | } |
| 262 | if (pthread_attr_setschedparam(&attr, ¶m) != 0) { |
| 263 | LOG(LS_ERROR) << "pthread_attr_setschedparam"; |
| 264 | } |
| 265 | } |
| 266 | } |
| 267 | } |
| 268 | #endif // !defined(__native_client__) |
| 269 | |
| 270 | int error_code = pthread_create(&thread_, &attr, PreRun, init); |
| 271 | if (0 != error_code) { |
| 272 | LOG(LS_ERROR) << "Unable to create pthread, error " << error_code; |
| 273 | return false; |
| 274 | } |
| 275 | started_ = true; |
| 276 | #endif |
| 277 | return true; |
| 278 | } |
| 279 | |
| 280 | void Thread::Join() { |
| 281 | if (started_) { |
| 282 | ASSERT(!IsCurrent()); |
| 283 | #if defined(WEBRTC_WIN) |
| 284 | WaitForSingleObject(thread_, INFINITE); |
| 285 | CloseHandle(thread_); |
| 286 | thread_ = NULL; |
| 287 | thread_id_ = 0; |
| 288 | #elif defined(WEBRTC_POSIX) |
| 289 | void *pv; |
| 290 | pthread_join(thread_, &pv); |
| 291 | #endif |
| 292 | started_ = false; |
| 293 | } |
| 294 | } |
| 295 | |
| 296 | #if defined(WEBRTC_WIN) |
| 297 | // As seen on MSDN. |
| 298 | // http://msdn.microsoft.com/en-us/library/xcb2z8hs(VS.71).aspx |
| 299 | #define MSDEV_SET_THREAD_NAME 0x406D1388 |
| 300 | typedef struct tagTHREADNAME_INFO { |
| 301 | DWORD dwType; |
| 302 | LPCSTR szName; |
| 303 | DWORD dwThreadID; |
| 304 | DWORD dwFlags; |
| 305 | } THREADNAME_INFO; |
| 306 | |
| 307 | void SetThreadName(DWORD dwThreadID, LPCSTR szThreadName) { |
| 308 | THREADNAME_INFO info; |
| 309 | info.dwType = 0x1000; |
| 310 | info.szName = szThreadName; |
| 311 | info.dwThreadID = dwThreadID; |
| 312 | info.dwFlags = 0; |
| 313 | |
| 314 | __try { |
| 315 | RaiseException(MSDEV_SET_THREAD_NAME, 0, sizeof(info) / sizeof(DWORD), |
| 316 | reinterpret_cast<ULONG_PTR*>(&info)); |
| 317 | } |
| 318 | __except(EXCEPTION_CONTINUE_EXECUTION) { |
| 319 | } |
| 320 | } |
| 321 | #endif // WEBRTC_WIN |
| 322 | |
| 323 | void* Thread::PreRun(void* pv) { |
| 324 | ThreadInit* init = static_cast<ThreadInit*>(pv); |
| 325 | ThreadManager::Instance()->SetCurrentThread(init->thread); |
| 326 | #if defined(WEBRTC_WIN) |
| 327 | SetThreadName(GetCurrentThreadId(), init->thread->name_.c_str()); |
| 328 | #elif defined(WEBRTC_POSIX) |
| 329 | // TODO: See if naming exists for pthreads. |
| 330 | #endif |
| 331 | #if __has_feature(objc_arc) |
| 332 | @autoreleasepool |
| 333 | #elif defined(WEBRTC_MAC) |
| 334 | // Make sure the new thread has an autoreleasepool |
| 335 | ScopedAutoreleasePool pool; |
| 336 | #endif |
| 337 | { |
| 338 | if (init->runnable) { |
| 339 | init->runnable->Run(init->thread); |
| 340 | } else { |
| 341 | init->thread->Run(); |
| 342 | } |
| 343 | if (init->thread->delete_self_when_complete_) { |
| 344 | init->thread->started_ = false; |
| 345 | delete init->thread; |
| 346 | } |
| 347 | delete init; |
| 348 | return NULL; |
| 349 | } |
| 350 | } |
| 351 | |
| 352 | void Thread::Run() { |
| 353 | ProcessMessages(kForever); |
| 354 | } |
| 355 | |
| 356 | bool Thread::IsOwned() { |
| 357 | return owned_; |
| 358 | } |
| 359 | |
| 360 | void Thread::Stop() { |
| 361 | MessageQueue::Quit(); |
| 362 | Join(); |
| 363 | } |
| 364 | |
| 365 | void Thread::Send(MessageHandler *phandler, uint32 id, MessageData *pdata) { |
| 366 | if (fStop_) |
| 367 | return; |
| 368 | |
| 369 | // Sent messages are sent to the MessageHandler directly, in the context |
| 370 | // of "thread", like Win32 SendMessage. If in the right context, |
| 371 | // call the handler directly. |
| 372 | |
| 373 | Message msg; |
| 374 | msg.phandler = phandler; |
| 375 | msg.message_id = id; |
| 376 | msg.pdata = pdata; |
| 377 | if (IsCurrent()) { |
| 378 | phandler->OnMessage(&msg); |
| 379 | return; |
| 380 | } |
| 381 | |
| 382 | AutoThread thread; |
| 383 | Thread *current_thread = Thread::Current(); |
| 384 | ASSERT(current_thread != NULL); // AutoThread ensures this |
| 385 | |
| 386 | bool ready = false; |
| 387 | { |
| 388 | CritScope cs(&crit_); |
| 389 | EnsureActive(); |
| 390 | _SendMessage smsg; |
| 391 | smsg.thread = current_thread; |
| 392 | smsg.msg = msg; |
| 393 | smsg.ready = &ready; |
| 394 | sendlist_.push_back(smsg); |
| 395 | } |
| 396 | |
| 397 | // Wait for a reply |
| 398 | |
| 399 | ss_->WakeUp(); |
| 400 | |
| 401 | bool waited = false; |
| 402 | crit_.Enter(); |
| 403 | while (!ready) { |
| 404 | crit_.Leave(); |
| 405 | current_thread->ReceiveSends(); |
| 406 | current_thread->socketserver()->Wait(kForever, false); |
| 407 | waited = true; |
| 408 | crit_.Enter(); |
| 409 | } |
| 410 | crit_.Leave(); |
| 411 | |
| 412 | // Our Wait loop above may have consumed some WakeUp events for this |
| 413 | // MessageQueue, that weren't relevant to this Send. Losing these WakeUps can |
| 414 | // cause problems for some SocketServers. |
| 415 | // |
| 416 | // Concrete example: |
| 417 | // Win32SocketServer on thread A calls Send on thread B. While processing the |
| 418 | // message, thread B Posts a message to A. We consume the wakeup for that |
| 419 | // Post while waiting for the Send to complete, which means that when we exit |
| 420 | // this loop, we need to issue another WakeUp, or else the Posted message |
| 421 | // won't be processed in a timely manner. |
| 422 | |
| 423 | if (waited) { |
| 424 | current_thread->socketserver()->WakeUp(); |
| 425 | } |
| 426 | } |
| 427 | |
| 428 | void Thread::ReceiveSends() { |
| 429 | // Receive a sent message. Cleanup scenarios: |
| 430 | // - thread sending exits: We don't allow this, since thread can exit |
| 431 | // only via Join, so Send must complete. |
| 432 | // - thread receiving exits: Wakeup/set ready in Thread::Clear() |
| 433 | // - object target cleared: Wakeup/set ready in Thread::Clear() |
| 434 | crit_.Enter(); |
| 435 | while (!sendlist_.empty()) { |
| 436 | _SendMessage smsg = sendlist_.front(); |
| 437 | sendlist_.pop_front(); |
| 438 | crit_.Leave(); |
| 439 | smsg.msg.phandler->OnMessage(&smsg.msg); |
| 440 | crit_.Enter(); |
| 441 | *smsg.ready = true; |
| 442 | smsg.thread->socketserver()->WakeUp(); |
| 443 | } |
| 444 | crit_.Leave(); |
| 445 | } |
| 446 | |
| 447 | void Thread::Clear(MessageHandler *phandler, uint32 id, |
| 448 | MessageList* removed) { |
| 449 | CritScope cs(&crit_); |
| 450 | |
| 451 | // Remove messages on sendlist_ with phandler |
| 452 | // Object target cleared: remove from send list, wakeup/set ready |
| 453 | // if sender not NULL. |
| 454 | |
| 455 | std::list<_SendMessage>::iterator iter = sendlist_.begin(); |
| 456 | while (iter != sendlist_.end()) { |
| 457 | _SendMessage smsg = *iter; |
| 458 | if (smsg.msg.Match(phandler, id)) { |
| 459 | if (removed) { |
| 460 | removed->push_back(smsg.msg); |
| 461 | } else { |
| 462 | delete smsg.msg.pdata; |
| 463 | } |
| 464 | iter = sendlist_.erase(iter); |
| 465 | *smsg.ready = true; |
| 466 | smsg.thread->socketserver()->WakeUp(); |
| 467 | continue; |
| 468 | } |
| 469 | ++iter; |
| 470 | } |
| 471 | |
| 472 | MessageQueue::Clear(phandler, id, removed); |
| 473 | } |
| 474 | |
| 475 | bool Thread::ProcessMessages(int cmsLoop) { |
| 476 | uint32 msEnd = (kForever == cmsLoop) ? 0 : TimeAfter(cmsLoop); |
| 477 | int cmsNext = cmsLoop; |
| 478 | |
| 479 | while (true) { |
| 480 | #if __has_feature(objc_arc) |
| 481 | @autoreleasepool |
| 482 | #elif defined(WEBRTC_MAC) |
| 483 | // see: http://developer.apple.com/library/mac/#documentation/Cocoa/Reference/Foundation/Classes/NSAutoreleasePool_Class/Reference/Reference.html |
| 484 | // Each thread is supposed to have an autorelease pool. Also for event loops |
| 485 | // like this, autorelease pool needs to be created and drained/released |
| 486 | // for each cycle. |
| 487 | ScopedAutoreleasePool pool; |
| 488 | #endif |
| 489 | { |
| 490 | Message msg; |
| 491 | if (!Get(&msg, cmsNext)) |
| 492 | return !IsQuitting(); |
| 493 | Dispatch(&msg); |
| 494 | |
| 495 | if (cmsLoop != kForever) { |
| 496 | cmsNext = TimeUntil(msEnd); |
| 497 | if (cmsNext < 0) |
| 498 | return true; |
| 499 | } |
| 500 | } |
| 501 | } |
| 502 | } |
| 503 | |
| 504 | bool Thread::WrapCurrent() { |
| 505 | return WrapCurrentWithThreadManager(ThreadManager::Instance()); |
| 506 | } |
| 507 | |
| 508 | bool Thread::WrapCurrentWithThreadManager(ThreadManager* thread_manager) { |
| 509 | if (started_) |
| 510 | return false; |
| 511 | #if defined(WEBRTC_WIN) |
| 512 | // We explicitly ask for no rights other than synchronization. |
| 513 | // This gives us the best chance of succeeding. |
| 514 | thread_ = OpenThread(SYNCHRONIZE, FALSE, GetCurrentThreadId()); |
| 515 | if (!thread_) { |
| 516 | LOG_GLE(LS_ERROR) << "Unable to get handle to thread."; |
| 517 | return false; |
| 518 | } |
| 519 | thread_id_ = GetCurrentThreadId(); |
| 520 | #elif defined(WEBRTC_POSIX) |
| 521 | thread_ = pthread_self(); |
| 522 | #endif |
| 523 | owned_ = false; |
| 524 | started_ = true; |
| 525 | thread_manager->SetCurrentThread(this); |
| 526 | return true; |
| 527 | } |
| 528 | |
| 529 | void Thread::UnwrapCurrent() { |
| 530 | // Clears the platform-specific thread-specific storage. |
| 531 | ThreadManager::Instance()->SetCurrentThread(NULL); |
| 532 | #if defined(WEBRTC_WIN) |
| 533 | if (!CloseHandle(thread_)) { |
| 534 | LOG_GLE(LS_ERROR) << "When unwrapping thread, failed to close handle."; |
| 535 | } |
| 536 | #endif |
| 537 | started_ = false; |
| 538 | } |
| 539 | |
| 540 | |
| 541 | AutoThread::AutoThread(SocketServer* ss) : Thread(ss) { |
| 542 | if (!ThreadManager::Instance()->CurrentThread()) { |
| 543 | ThreadManager::Instance()->SetCurrentThread(this); |
| 544 | } |
| 545 | } |
| 546 | |
| 547 | AutoThread::~AutoThread() { |
| 548 | Stop(); |
| 549 | if (ThreadManager::Instance()->CurrentThread() == this) { |
| 550 | ThreadManager::Instance()->SetCurrentThread(NULL); |
| 551 | } |
| 552 | } |
| 553 | |
| 554 | #if defined(WEBRTC_WIN) |
| 555 | void ComThread::Run() { |
| 556 | HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED); |
| 557 | ASSERT(SUCCEEDED(hr)); |
| 558 | if (SUCCEEDED(hr)) { |
| 559 | Thread::Run(); |
| 560 | CoUninitialize(); |
| 561 | } else { |
| 562 | LOG(LS_ERROR) << "CoInitialize failed, hr=" << hr; |
| 563 | } |
| 564 | } |
| 565 | #endif |
| 566 | |
| 567 | } // namespace rtc |