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1 // Copyright 2012 The Chromium Authors. All rights reserved. | 1 // Copyright 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/message_loop/message_pump_io_ios.h" | 5 #include "base/message_loop/message_pump_io_ios.h" |
6 | 6 |
7 namespace base { | 7 namespace base { |
8 | 8 |
9 MessagePumpIOSForIO::FileDescriptorWatcher::FileDescriptorWatcher() | 9 MessagePumpIOSForIO::FileDescriptorWatcher::FileDescriptorWatcher() |
10 : is_persistent_(false), | 10 : is_persistent_(false), |
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172 void MessagePumpIOSForIO::HandleFdIOEvent(CFFileDescriptorRef fdref, | 172 void MessagePumpIOSForIO::HandleFdIOEvent(CFFileDescriptorRef fdref, |
173 CFOptionFlags callback_types, | 173 CFOptionFlags callback_types, |
174 void* context) { | 174 void* context) { |
175 FileDescriptorWatcher* controller = | 175 FileDescriptorWatcher* controller = |
176 static_cast<FileDescriptorWatcher*>(context); | 176 static_cast<FileDescriptorWatcher*>(context); |
177 DCHECK_EQ(fdref, controller->fdref_); | 177 DCHECK_EQ(fdref, controller->fdref_); |
178 | 178 |
179 // Ensure that |fdref| will remain live for the duration of this function | 179 // Ensure that |fdref| will remain live for the duration of this function |
180 // call even if |controller| is deleted or |StopWatchingFileDescriptor()| is | 180 // call even if |controller| is deleted or |StopWatchingFileDescriptor()| is |
181 // called, either of which will cause |fdref| to be released. | 181 // called, either of which will cause |fdref| to be released. |
182 mac::ScopedCFTypeRef<CFFileDescriptorRef> scoped_fdref( | 182 ScopedCFTypeRef<CFFileDescriptorRef> scoped_fdref( |
183 fdref, base::scoped_policy::RETAIN); | 183 fdref, base::scoped_policy::RETAIN); |
184 | 184 |
185 int fd = CFFileDescriptorGetNativeDescriptor(fdref); | 185 int fd = CFFileDescriptorGetNativeDescriptor(fdref); |
186 MessagePumpIOSForIO* pump = controller->pump(); | 186 MessagePumpIOSForIO* pump = controller->pump(); |
187 if (callback_types & kCFFileDescriptorWriteCallBack) | 187 if (callback_types & kCFFileDescriptorWriteCallBack) |
188 controller->OnFileCanWriteWithoutBlocking(fd, pump); | 188 controller->OnFileCanWriteWithoutBlocking(fd, pump); |
189 | 189 |
190 // Perform the read callback only if the file descriptor has not been | 190 // Perform the read callback only if the file descriptor has not been |
191 // invalidated in the write callback. As |FileDescriptorWatcher| invalidates | 191 // invalidated in the write callback. As |FileDescriptorWatcher| invalidates |
192 // its file descriptor on destruction, the file descriptor being valid also | 192 // its file descriptor on destruction, the file descriptor being valid also |
193 // guarantees that |controller| has not been deleted. | 193 // guarantees that |controller| has not been deleted. |
194 if (callback_types & kCFFileDescriptorReadCallBack && | 194 if (callback_types & kCFFileDescriptorReadCallBack && |
195 CFFileDescriptorIsValid(fdref)) { | 195 CFFileDescriptorIsValid(fdref)) { |
196 DCHECK_EQ(fdref, controller->fdref_); | 196 DCHECK_EQ(fdref, controller->fdref_); |
197 controller->OnFileCanReadWithoutBlocking(fd, pump); | 197 controller->OnFileCanReadWithoutBlocking(fd, pump); |
198 } | 198 } |
199 | 199 |
200 // Re-enable callbacks after the read/write if the file descriptor is still | 200 // Re-enable callbacks after the read/write if the file descriptor is still |
201 // valid and the controller is persistent. | 201 // valid and the controller is persistent. |
202 if (CFFileDescriptorIsValid(fdref) && controller->is_persistent_) { | 202 if (CFFileDescriptorIsValid(fdref) && controller->is_persistent_) { |
203 DCHECK_EQ(fdref, controller->fdref_); | 203 DCHECK_EQ(fdref, controller->fdref_); |
204 CFFileDescriptorEnableCallBacks(fdref, callback_types); | 204 CFFileDescriptorEnableCallBacks(fdref, callback_types); |
205 } | 205 } |
206 } | 206 } |
207 | 207 |
208 } // namespace base | 208 } // namespace base |
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