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| 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 Socket* MacBaseSocketServer::CreateSocket(int type) { | |
| 33 return NULL; | |
| 34 } | |
| 35 | |
| 36 Socket* MacBaseSocketServer::CreateSocket(int family, int type) { | |
| 37 return NULL; | |
| 38 } | |
| 39 | |
| 40 AsyncSocket* MacBaseSocketServer::CreateAsyncSocket(int type) { | |
| 41 return CreateAsyncSocket(AF_INET, type); | |
| 42 } | |
| 43 | |
| 44 AsyncSocket* MacBaseSocketServer::CreateAsyncSocket(int family, int type) { | |
| 45 if (SOCK_STREAM != type) | |
| 46 return NULL; | |
| 47 | |
| 48 MacAsyncSocket* socket = new MacAsyncSocket(this, family); | |
| 49 if (!socket->valid()) { | |
| 50 delete socket; | |
| 51 return NULL; | |
| 52 } | |
| 53 return socket; | |
| 54 } | |
| 55 | |
| 56 void MacBaseSocketServer::RegisterSocket(MacAsyncSocket* s) { | |
| 57 sockets_.insert(s); | |
| 58 } | |
| 59 | |
| 60 void MacBaseSocketServer::UnregisterSocket(MacAsyncSocket* s) { | |
| 61 VERIFY(1 == sockets_.erase(s)); // found 1 | |
| 62 } | |
| 63 | |
| 64 bool MacBaseSocketServer::SetPosixSignalHandler(int signum, | |
| 65 void (*handler)(int)) { | |
| 66 Dispatcher* dispatcher = signal_dispatcher(); | |
| 67 if (!PhysicalSocketServer::SetPosixSignalHandler(signum, handler)) { | |
| 68 return false; | |
| 69 } | |
| 70 | |
| 71 // Only register the FD once, when the first custom handler is installed. | |
| 72 if (!dispatcher && (dispatcher = signal_dispatcher())) { | |
| 73 CFFileDescriptorContext ctx = { 0 }; | |
| 74 ctx.info = this; | |
| 75 | |
| 76 CFFileDescriptorRef desc = CFFileDescriptorCreate( | |
| 77 kCFAllocatorDefault, | |
| 78 dispatcher->GetDescriptor(), | |
| 79 false, | |
| 80 &MacBaseSocketServer::FileDescriptorCallback, | |
| 81 &ctx); | |
| 82 if (!desc) { | |
| 83 return false; | |
| 84 } | |
| 85 | |
| 86 CFFileDescriptorEnableCallBacks(desc, kCFFileDescriptorReadCallBack); | |
| 87 CFRunLoopSourceRef ref = | |
| 88 CFFileDescriptorCreateRunLoopSource(kCFAllocatorDefault, desc, 0); | |
| 89 | |
| 90 if (!ref) { | |
| 91 CFRelease(desc); | |
| 92 return false; | |
| 93 } | |
| 94 | |
| 95 CFRunLoopAddSource(CFRunLoopGetCurrent(), ref, kCFRunLoopCommonModes); | |
| 96 CFRelease(desc); | |
| 97 CFRelease(ref); | |
| 98 } | |
| 99 | |
| 100 return true; | |
| 101 } | |
| 102 | |
| 103 // Used to disable socket events from waking our message queue when | |
| 104 // process_io is false. Does not disable signal event handling though. | |
| 105 void MacBaseSocketServer::EnableSocketCallbacks(bool enable) { | |
| 106 for (std::set<MacAsyncSocket*>::iterator it = sockets().begin(); | |
| 107 it != sockets().end(); ++it) { | |
| 108 if (enable) { | |
| 109 (*it)->EnableCallbacks(); | |
| 110 } else { | |
| 111 (*it)->DisableCallbacks(); | |
| 112 } | |
| 113 } | |
| 114 } | |
| 115 | |
| 116 void MacBaseSocketServer::FileDescriptorCallback(CFFileDescriptorRef fd, | |
| 117 CFOptionFlags flags, | |
| 118 void* context) { | |
| 119 MacBaseSocketServer* this_ss = | |
| 120 reinterpret_cast<MacBaseSocketServer*>(context); | |
| 121 ASSERT(this_ss); | |
| 122 Dispatcher* signal_dispatcher = this_ss->signal_dispatcher(); | |
| 123 ASSERT(signal_dispatcher); | |
| 124 | |
| 125 signal_dispatcher->OnPreEvent(DE_READ); | |
| 126 signal_dispatcher->OnEvent(DE_READ, 0); | |
| 127 CFFileDescriptorEnableCallBacks(fd, kCFFileDescriptorReadCallBack); | |
| 128 } | |
| 129 | |
| 130 | |
| 131 /////////////////////////////////////////////////////////////////////////////// | |
| 132 // MacCFSocketServer | |
| 133 /////////////////////////////////////////////////////////////////////////////// | |
| 134 | |
| 135 void WakeUpCallback(void* info) { | |
| 136 MacCFSocketServer* server = static_cast<MacCFSocketServer*>(info); | |
| 137 ASSERT(NULL != server); | |
| 138 server->OnWakeUpCallback(); | |
| 139 } | |
| 140 | |
| 141 MacCFSocketServer::MacCFSocketServer() | |
| 142 : run_loop_(CFRunLoopGetCurrent()), | |
| 143 wake_up_(NULL) { | |
| 144 CFRunLoopSourceContext ctx; | |
| 145 memset(&ctx, 0, sizeof(ctx)); | |
| 146 ctx.info = this; | |
| 147 ctx.perform = &WakeUpCallback; | |
| 148 wake_up_ = CFRunLoopSourceCreate(NULL, 0, &ctx); | |
| 149 ASSERT(NULL != wake_up_); | |
| 150 if (wake_up_) { | |
| 151 CFRunLoopAddSource(run_loop_, wake_up_, kCFRunLoopCommonModes); | |
| 152 } | |
| 153 } | |
| 154 | |
| 155 MacCFSocketServer::~MacCFSocketServer() { | |
| 156 if (wake_up_) { | |
| 157 CFRunLoopSourceInvalidate(wake_up_); | |
| 158 CFRelease(wake_up_); | |
| 159 } | |
| 160 } | |
| 161 | |
| 162 bool MacCFSocketServer::Wait(int cms, bool process_io) { | |
| 163 ASSERT(CFRunLoopGetCurrent() == run_loop_); | |
| 164 | |
| 165 if (!process_io && cms == 0) { | |
| 166 // No op. | |
| 167 return true; | |
| 168 } | |
| 169 | |
| 170 if (!process_io) { | |
| 171 // No way to listen to common modes and not get socket events, unless | |
| 172 // we disable each one's callbacks. | |
| 173 EnableSocketCallbacks(false); | |
| 174 } | |
| 175 | |
| 176 SInt32 result; | |
| 177 if (kForever == cms) { | |
| 178 do { | |
| 179 // Would prefer to run in a custom mode that only listens to wake_up, | |
| 180 // but we have qtkit sending work to the main thread which is effectively | |
| 181 // blocked here, causing deadlock. Thus listen to the common modes. | |
| 182 // TODO: If QTKit becomes thread safe, do the above. | |
| 183 result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, 10000000, false); | |
| 184 } while (result != kCFRunLoopRunFinished && result != kCFRunLoopRunStopped); | |
| 185 } else { | |
| 186 // TODO: In the case of 0ms wait, this will only process one event, so we | |
| 187 // may want to loop until it returns TimedOut. | |
| 188 CFTimeInterval seconds = cms / 1000.0; | |
| 189 result = CFRunLoopRunInMode(kCFRunLoopDefaultMode, seconds, false); | |
| 190 } | |
| 191 | |
| 192 if (!process_io) { | |
| 193 // Reenable them. Hopefully this won't cause spurious callbacks or | |
| 194 // missing ones while they were disabled. | |
| 195 EnableSocketCallbacks(true); | |
| 196 } | |
| 197 | |
| 198 if (kCFRunLoopRunFinished == result) { | |
| 199 return false; | |
| 200 } | |
| 201 return true; | |
| 202 } | |
| 203 | |
| 204 void MacCFSocketServer::WakeUp() { | |
| 205 if (wake_up_) { | |
| 206 CFRunLoopSourceSignal(wake_up_); | |
| 207 CFRunLoopWakeUp(run_loop_); | |
| 208 } | |
| 209 } | |
| 210 | |
| 211 void MacCFSocketServer::OnWakeUpCallback() { | |
| 212 ASSERT(run_loop_ == CFRunLoopGetCurrent()); | |
| 213 CFRunLoopStop(run_loop_); | |
| 214 } | |
| 215 } // namespace rtc | |
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