henrike@webrtc.org | f7795df | 2014-05-13 18:00:26 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2007 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 | |
| 12 | #include "webrtc/base/macsocketserver.h" |
| 13 | |
| 14 | #include "webrtc/base/common.h" |
| 15 | #include "webrtc/base/logging.h" |
| 16 | #include "webrtc/base/macasyncsocket.h" |
| 17 | #include "webrtc/base/macutils.h" |
| 18 | #include "webrtc/base/thread.h" |
| 19 | |
| 20 | namespace rtc { |
| 21 | |
| 22 | /////////////////////////////////////////////////////////////////////////////// |
| 23 | // MacBaseSocketServer |
| 24 | /////////////////////////////////////////////////////////////////////////////// |
| 25 | |
| 26 | MacBaseSocketServer::MacBaseSocketServer() { |
| 27 | } |
| 28 | |
| 29 | MacBaseSocketServer::~MacBaseSocketServer() { |
| 30 | } |
| 31 | |
| 32 | AsyncSocket* MacBaseSocketServer::CreateAsyncSocket(int type) { |
| 33 | return CreateAsyncSocket(AF_INET, type); |
| 34 | } |
| 35 | |
| 36 | AsyncSocket* MacBaseSocketServer::CreateAsyncSocket(int family, int type) { |
| 37 | if (SOCK_STREAM != type) |
| 38 | return NULL; |
| 39 | |
| 40 | MacAsyncSocket* socket = new MacAsyncSocket(this, family); |
| 41 | if (!socket->valid()) { |
| 42 | delete socket; |
| 43 | return NULL; |
| 44 | } |
| 45 | return socket; |
| 46 | } |
| 47 | |
| 48 | void MacBaseSocketServer::RegisterSocket(MacAsyncSocket* s) { |
| 49 | sockets_.insert(s); |
| 50 | } |
| 51 | |
| 52 | void MacBaseSocketServer::UnregisterSocket(MacAsyncSocket* s) { |
| 53 | VERIFY(1 == sockets_.erase(s)); // found 1 |
| 54 | } |
| 55 | |
| 56 | bool MacBaseSocketServer::SetPosixSignalHandler(int signum, |
| 57 | void (*handler)(int)) { |
| 58 | Dispatcher* dispatcher = signal_dispatcher(); |
| 59 | if (!PhysicalSocketServer::SetPosixSignalHandler(signum, handler)) { |
| 60 | return false; |
| 61 | } |
| 62 | |
| 63 | // Only register the FD once, when the first custom handler is installed. |
| 64 | if (!dispatcher && (dispatcher = signal_dispatcher())) { |
| 65 | CFFileDescriptorContext ctx = { 0 }; |
| 66 | ctx.info = this; |
| 67 | |
| 68 | CFFileDescriptorRef desc = CFFileDescriptorCreate( |
| 69 | kCFAllocatorDefault, |
| 70 | dispatcher->GetDescriptor(), |
| 71 | false, |
| 72 | &MacBaseSocketServer::FileDescriptorCallback, |
| 73 | &ctx); |
| 74 | if (!desc) { |
| 75 | return false; |
| 76 | } |
| 77 | |
| 78 | CFFileDescriptorEnableCallBacks(desc, kCFFileDescriptorReadCallBack); |
| 79 | CFRunLoopSourceRef ref = |
| 80 | CFFileDescriptorCreateRunLoopSource(kCFAllocatorDefault, desc, 0); |
| 81 | |
| 82 | if (!ref) { |
| 83 | CFRelease(desc); |
| 84 | return false; |
| 85 | } |
| 86 | |
| 87 | CFRunLoopAddSource(CFRunLoopGetCurrent(), ref, kCFRunLoopCommonModes); |
| 88 | CFRelease(desc); |
| 89 | CFRelease(ref); |
| 90 | } |
| 91 | |
| 92 | return true; |
| 93 | } |
| 94 | |
| 95 | // Used to disable socket events from waking our message queue when |
| 96 | // process_io is false. Does not disable signal event handling though. |
| 97 | void MacBaseSocketServer::EnableSocketCallbacks(bool enable) { |
| 98 | for (std::set<MacAsyncSocket*>::iterator it = sockets().begin(); |
| 99 | it != sockets().end(); ++it) { |
| 100 | if (enable) { |
| 101 | (*it)->EnableCallbacks(); |
| 102 | } else { |
| 103 | (*it)->DisableCallbacks(); |
| 104 | } |
| 105 | } |
| 106 | } |
| 107 | |
| 108 | void MacBaseSocketServer::FileDescriptorCallback(CFFileDescriptorRef fd, |
| 109 | CFOptionFlags flags, |
| 110 | void* context) { |
| 111 | MacBaseSocketServer* this_ss = |
| 112 | reinterpret_cast<MacBaseSocketServer*>(context); |
| 113 | ASSERT(this_ss); |
| 114 | Dispatcher* signal_dispatcher = this_ss->signal_dispatcher(); |
| 115 | ASSERT(signal_dispatcher); |
| 116 | |
| 117 | signal_dispatcher->OnPreEvent(DE_READ); |
| 118 | signal_dispatcher->OnEvent(DE_READ, 0); |
| 119 | CFFileDescriptorEnableCallBacks(fd, kCFFileDescriptorReadCallBack); |
| 120 | } |
| 121 | |
| 122 | |
| 123 | /////////////////////////////////////////////////////////////////////////////// |
| 124 | // MacCFSocketServer |
| 125 | /////////////////////////////////////////////////////////////////////////////// |
| 126 | |
| 127 | void WakeUpCallback(void* info) { |
| 128 | MacCFSocketServer* server = static_cast<MacCFSocketServer*>(info); |
| 129 | ASSERT(NULL != server); |
| 130 | server->OnWakeUpCallback(); |
| 131 | } |
| 132 | |
| 133 | MacCFSocketServer::MacCFSocketServer() |
| 134 | : run_loop_(CFRunLoopGetCurrent()), |
| 135 | wake_up_(NULL) { |
| 136 | CFRunLoopSourceContext ctx; |
| 137 | memset(&ctx, 0, sizeof(ctx)); |
| 138 | ctx.info = this; |
| 139 | ctx.perform = &WakeUpCallback; |
| 140 | wake_up_ = CFRunLoopSourceCreate(NULL, 0, &ctx); |
| 141 | ASSERT(NULL != wake_up_); |
| 142 | if (wake_up_) { |
| 143 | CFRunLoopAddSource(run_loop_, wake_up_, kCFRunLoopCommonModes); |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | MacCFSocketServer::~MacCFSocketServer() { |
| 148 | if (wake_up_) { |
| 149 | CFRunLoopSourceInvalidate(wake_up_); |
| 150 | CFRelease(wake_up_); |
| 151 | } |
| 152 | } |
| 153 | |
| 154 | bool MacCFSocketServer::Wait(int cms, bool process_io) { |
| 155 | ASSERT(CFRunLoopGetCurrent() == run_loop_); |
| 156 | |
| 157 | if (!process_io && cms == 0) { |
| 158 | // No op. |
| 159 | return true; |
| 160 | } |
| 161 | |
| 162 | if (!process_io) { |
| 163 | // No way to listen to common modes and not get socket events, unless |
| 164 | // we disable each one's callbacks. |
| 165 | EnableSocketCallbacks(false); |
| 166 | } |
| 167 | |
| 168 | SInt32 result; |
| 169 | if (kForever == cms) { |
| 170 | do { |
| 171 | // Would prefer to run in a custom mode that only listens to wake_up, |
| 172 | // but we have qtkit sending work to the main thread which is effectively |
| 173 | // blocked here, causing deadlock. Thus listen to the common modes. |
| 174 | // TODO: If QTKit becomes thread safe, do the above. |
| 175 | result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 10000000, false); |
| 176 | } while (result != kCFRunLoopRunFinished && result != kCFRunLoopRunStopped); |
| 177 | } else { |
| 178 | // TODO: In the case of 0ms wait, this will only process one event, so we |
| 179 | // may want to loop until it returns TimedOut. |
| 180 | CFTimeInterval seconds = cms / 1000.0; |
| 181 | result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, seconds, false); |
| 182 | } |
| 183 | |
| 184 | if (!process_io) { |
| 185 | // Reenable them. Hopefully this won't cause spurious callbacks or |
| 186 | // missing ones while they were disabled. |
| 187 | EnableSocketCallbacks(true); |
| 188 | } |
| 189 | |
| 190 | if (kCFRunLoopRunFinished == result) { |
| 191 | return false; |
| 192 | } |
| 193 | return true; |
| 194 | } |
| 195 | |
| 196 | void MacCFSocketServer::WakeUp() { |
| 197 | if (wake_up_) { |
| 198 | CFRunLoopSourceSignal(wake_up_); |
| 199 | CFRunLoopWakeUp(run_loop_); |
| 200 | } |
| 201 | } |
| 202 | |
| 203 | void MacCFSocketServer::OnWakeUpCallback() { |
| 204 | ASSERT(run_loop_ == CFRunLoopGetCurrent()); |
| 205 | CFRunLoopStop(run_loop_); |
| 206 | } |
| 207 | |
| 208 | /////////////////////////////////////////////////////////////////////////////// |
| 209 | // MacCarbonSocketServer |
| 210 | /////////////////////////////////////////////////////////////////////////////// |
| 211 | #ifndef CARBON_DEPRECATED |
| 212 | |
| 213 | const UInt32 kEventClassSocketServer = 'MCSS'; |
| 214 | const UInt32 kEventWakeUp = 'WAKE'; |
| 215 | const EventTypeSpec kEventWakeUpSpec[] = { |
| 216 | { kEventClassSocketServer, kEventWakeUp } |
| 217 | }; |
| 218 | |
| 219 | std::string DecodeEvent(EventRef event) { |
| 220 | std::string str; |
| 221 | DecodeFourChar(::GetEventClass(event), &str); |
| 222 | str.push_back(':'); |
| 223 | DecodeFourChar(::GetEventKind(event), &str); |
| 224 | return str; |
| 225 | } |
| 226 | |
| 227 | MacCarbonSocketServer::MacCarbonSocketServer() |
| 228 | : event_queue_(GetCurrentEventQueue()), wake_up_(NULL) { |
| 229 | VERIFY(noErr == CreateEvent(NULL, kEventClassSocketServer, kEventWakeUp, 0, |
| 230 | kEventAttributeUserEvent, &wake_up_)); |
| 231 | } |
| 232 | |
| 233 | MacCarbonSocketServer::~MacCarbonSocketServer() { |
| 234 | if (wake_up_) { |
| 235 | ReleaseEvent(wake_up_); |
| 236 | } |
| 237 | } |
| 238 | |
| 239 | bool MacCarbonSocketServer::Wait(int cms, bool process_io) { |
| 240 | ASSERT(GetCurrentEventQueue() == event_queue_); |
| 241 | |
| 242 | // Listen to all events if we're processing I/O. |
| 243 | // Only listen for our wakeup event if we're not. |
| 244 | UInt32 num_types = 0; |
| 245 | const EventTypeSpec* events = NULL; |
| 246 | if (!process_io) { |
| 247 | num_types = GetEventTypeCount(kEventWakeUpSpec); |
| 248 | events = kEventWakeUpSpec; |
| 249 | } |
| 250 | |
| 251 | EventTargetRef target = GetEventDispatcherTarget(); |
| 252 | EventTimeout timeout = |
| 253 | (kForever == cms) ? kEventDurationForever : cms / 1000.0; |
| 254 | EventTimeout end_time = GetCurrentEventTime() + timeout; |
| 255 | |
| 256 | bool done = false; |
| 257 | while (!done) { |
| 258 | EventRef event; |
| 259 | OSStatus result = ReceiveNextEvent(num_types, events, timeout, true, |
| 260 | &event); |
| 261 | if (noErr == result) { |
| 262 | if (wake_up_ != event) { |
| 263 | LOG_F(LS_VERBOSE) << "Dispatching event: " << DecodeEvent(event); |
| 264 | result = SendEventToEventTarget(event, target); |
| 265 | if ((noErr != result) && (eventNotHandledErr != result)) { |
| 266 | LOG_E(LS_ERROR, OS, result) << "SendEventToEventTarget"; |
| 267 | } |
| 268 | } else { |
| 269 | done = true; |
| 270 | } |
| 271 | ReleaseEvent(event); |
| 272 | } else if (eventLoopTimedOutErr == result) { |
| 273 | ASSERT(cms != kForever); |
| 274 | done = true; |
| 275 | } else if (eventLoopQuitErr == result) { |
| 276 | // Ignore this... we get spurious quits for a variety of reasons. |
| 277 | LOG_E(LS_VERBOSE, OS, result) << "ReceiveNextEvent"; |
| 278 | } else { |
| 279 | // Some strange error occurred. Log it. |
| 280 | LOG_E(LS_WARNING, OS, result) << "ReceiveNextEvent"; |
| 281 | return false; |
| 282 | } |
| 283 | if (kForever != cms) { |
| 284 | timeout = end_time - GetCurrentEventTime(); |
| 285 | } |
| 286 | } |
| 287 | return true; |
| 288 | } |
| 289 | |
| 290 | void MacCarbonSocketServer::WakeUp() { |
| 291 | if (!IsEventInQueue(event_queue_, wake_up_)) { |
| 292 | RetainEvent(wake_up_); |
| 293 | OSStatus result = PostEventToQueue(event_queue_, wake_up_, |
| 294 | kEventPriorityStandard); |
| 295 | if (noErr != result) { |
| 296 | LOG_E(LS_ERROR, OS, result) << "PostEventToQueue"; |
| 297 | } |
| 298 | } |
| 299 | } |
| 300 | |
| 301 | /////////////////////////////////////////////////////////////////////////////// |
| 302 | // MacCarbonAppSocketServer |
| 303 | /////////////////////////////////////////////////////////////////////////////// |
| 304 | |
| 305 | MacCarbonAppSocketServer::MacCarbonAppSocketServer() |
| 306 | : event_queue_(GetCurrentEventQueue()) { |
| 307 | // Install event handler |
| 308 | VERIFY(noErr == InstallApplicationEventHandler( |
| 309 | NewEventHandlerUPP(WakeUpEventHandler), 1, kEventWakeUpSpec, this, |
| 310 | &event_handler_)); |
| 311 | |
| 312 | // Install a timer and set it idle to begin with. |
| 313 | VERIFY(noErr == InstallEventLoopTimer(GetMainEventLoop(), |
| 314 | kEventDurationForever, |
| 315 | kEventDurationForever, |
| 316 | NewEventLoopTimerUPP(TimerHandler), |
| 317 | this, |
| 318 | &timer_)); |
| 319 | } |
| 320 | |
| 321 | MacCarbonAppSocketServer::~MacCarbonAppSocketServer() { |
| 322 | RemoveEventLoopTimer(timer_); |
| 323 | RemoveEventHandler(event_handler_); |
| 324 | } |
| 325 | |
| 326 | OSStatus MacCarbonAppSocketServer::WakeUpEventHandler( |
| 327 | EventHandlerCallRef next, EventRef event, void *data) { |
| 328 | QuitApplicationEventLoop(); |
| 329 | return noErr; |
| 330 | } |
| 331 | |
| 332 | void MacCarbonAppSocketServer::TimerHandler( |
| 333 | EventLoopTimerRef timer, void *data) { |
| 334 | QuitApplicationEventLoop(); |
| 335 | } |
| 336 | |
| 337 | bool MacCarbonAppSocketServer::Wait(int cms, bool process_io) { |
| 338 | if (!process_io && cms == 0) { |
| 339 | // No op. |
| 340 | return true; |
| 341 | } |
| 342 | if (kForever != cms) { |
| 343 | // Start a timer. |
| 344 | OSStatus error = |
| 345 | SetEventLoopTimerNextFireTime(timer_, cms / 1000.0); |
| 346 | if (error != noErr) { |
| 347 | LOG(LS_ERROR) << "Failed setting next fire time."; |
| 348 | } |
| 349 | } |
| 350 | if (!process_io) { |
| 351 | // No way to listen to common modes and not get socket events, unless |
| 352 | // we disable each one's callbacks. |
| 353 | EnableSocketCallbacks(false); |
| 354 | } |
| 355 | RunApplicationEventLoop(); |
| 356 | if (!process_io) { |
| 357 | // Reenable them. Hopefully this won't cause spurious callbacks or |
| 358 | // missing ones while they were disabled. |
| 359 | EnableSocketCallbacks(true); |
| 360 | } |
| 361 | return true; |
| 362 | } |
| 363 | |
| 364 | void MacCarbonAppSocketServer::WakeUp() { |
| 365 | // TODO: No-op if there's already a WakeUp in flight. |
| 366 | EventRef wake_up; |
| 367 | VERIFY(noErr == CreateEvent(NULL, kEventClassSocketServer, kEventWakeUp, 0, |
| 368 | kEventAttributeUserEvent, &wake_up)); |
| 369 | OSStatus result = PostEventToQueue(event_queue_, wake_up, |
| 370 | kEventPriorityStandard); |
| 371 | if (noErr != result) { |
| 372 | LOG_E(LS_ERROR, OS, result) << "PostEventToQueue"; |
| 373 | } |
| 374 | ReleaseEvent(wake_up); |
| 375 | } |
| 376 | |
| 377 | #endif |
| 378 | } // namespace rtc |