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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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/files/file_descriptor_watcher_posix.h" | 5 #include "base/files/file_descriptor_watcher_posix.h" |
6 | 6 |
7 #include "base/bind.h" | 7 #include "base/bind.h" |
8 #include "base/lazy_instance.h" | 8 #include "base/lazy_instance.h" |
9 #include "base/logging.h" | 9 #include "base/logging.h" |
10 #include "base/memory/ptr_util.h" | 10 #include "base/memory/ptr_util.h" |
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117 } | 117 } |
118 } | 118 } |
119 | 119 |
120 void FileDescriptorWatcher::Controller::Watcher::OnFileCanReadWithoutBlocking( | 120 void FileDescriptorWatcher::Controller::Watcher::OnFileCanReadWithoutBlocking( |
121 int fd) { | 121 int fd) { |
122 DCHECK_EQ(fd_, fd); | 122 DCHECK_EQ(fd_, fd); |
123 DCHECK_EQ(MessageLoopForIO::WATCH_READ, mode_); | 123 DCHECK_EQ(MessageLoopForIO::WATCH_READ, mode_); |
124 DCHECK(thread_checker_.CalledOnValidThread()); | 124 DCHECK(thread_checker_.CalledOnValidThread()); |
125 | 125 |
126 // Run the callback on the sequence on which the watch was initiated. | 126 // Run the callback on the sequence on which the watch was initiated. |
127 callback_task_runner_->PostTask(FROM_HERE, | 127 callback_task_runner_->PostTask( |
128 Bind(&Controller::RunCallback, controller_)); | 128 FROM_HERE, BindOnce(&Controller::RunCallback, controller_)); |
129 } | 129 } |
130 | 130 |
131 void FileDescriptorWatcher::Controller::Watcher::OnFileCanWriteWithoutBlocking( | 131 void FileDescriptorWatcher::Controller::Watcher::OnFileCanWriteWithoutBlocking( |
132 int fd) { | 132 int fd) { |
133 DCHECK_EQ(fd_, fd); | 133 DCHECK_EQ(fd_, fd); |
134 DCHECK_EQ(MessageLoopForIO::WATCH_WRITE, mode_); | 134 DCHECK_EQ(MessageLoopForIO::WATCH_WRITE, mode_); |
135 DCHECK(thread_checker_.CalledOnValidThread()); | 135 DCHECK(thread_checker_.CalledOnValidThread()); |
136 | 136 |
137 // Run the callback on the sequence on which the watch was initiated. | 137 // Run the callback on the sequence on which the watch was initiated. |
138 callback_task_runner_->PostTask(FROM_HERE, | 138 callback_task_runner_->PostTask( |
139 Bind(&Controller::RunCallback, controller_)); | 139 FROM_HERE, BindOnce(&Controller::RunCallback, controller_)); |
140 } | 140 } |
141 | 141 |
142 void FileDescriptorWatcher::Controller::Watcher:: | 142 void FileDescriptorWatcher::Controller::Watcher:: |
143 WillDestroyCurrentMessageLoop() { | 143 WillDestroyCurrentMessageLoop() { |
144 DCHECK(thread_checker_.CalledOnValidThread()); | 144 DCHECK(thread_checker_.CalledOnValidThread()); |
145 | 145 |
146 // A Watcher is owned by a Controller. When the Controller is deleted, it | 146 // A Watcher is owned by a Controller. When the Controller is deleted, it |
147 // transfers ownership of the Watcher to a delete task posted to the | 147 // transfers ownership of the Watcher to a delete task posted to the |
148 // MessageLoopForIO. If the MessageLoopForIO is deleted before the delete task | 148 // MessageLoopForIO. If the MessageLoopForIO is deleted before the delete task |
149 // runs, the following line takes care of deleting the Watcher. | 149 // runs, the following line takes care of deleting the Watcher. |
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163 StartWatching(); | 163 StartWatching(); |
164 } | 164 } |
165 | 165 |
166 void FileDescriptorWatcher::Controller::StartWatching() { | 166 void FileDescriptorWatcher::Controller::StartWatching() { |
167 DCHECK(sequence_checker_.CalledOnValidSequence()); | 167 DCHECK(sequence_checker_.CalledOnValidSequence()); |
168 // It is safe to use Unretained() below because |watcher_| can only be deleted | 168 // It is safe to use Unretained() below because |watcher_| can only be deleted |
169 // by a delete task posted to |message_loop_for_io_task_runner_| by this | 169 // by a delete task posted to |message_loop_for_io_task_runner_| by this |
170 // Controller's destructor. Since this delete task hasn't been posted yet, it | 170 // Controller's destructor. Since this delete task hasn't been posted yet, it |
171 // can't run before the task posted below. | 171 // can't run before the task posted below. |
172 message_loop_for_io_task_runner_->PostTask( | 172 message_loop_for_io_task_runner_->PostTask( |
173 FROM_HERE, Bind(&Watcher::StartWatching, Unretained(watcher_.get()))); | 173 FROM_HERE, BindOnce(&Watcher::StartWatching, Unretained(watcher_.get()))); |
174 } | 174 } |
175 | 175 |
176 void FileDescriptorWatcher::Controller::RunCallback() { | 176 void FileDescriptorWatcher::Controller::RunCallback() { |
177 DCHECK(sequence_checker_.CalledOnValidSequence()); | 177 DCHECK(sequence_checker_.CalledOnValidSequence()); |
178 | 178 |
179 WeakPtr<Controller> weak_this = weak_factory_.GetWeakPtr(); | 179 WeakPtr<Controller> weak_this = weak_factory_.GetWeakPtr(); |
180 | 180 |
181 callback_.Run(); | 181 callback_.Run(); |
182 | 182 |
183 // If |this| wasn't deleted, re-enable the watch. | 183 // If |this| wasn't deleted, re-enable the watch. |
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201 return WrapUnique(new Controller(MessageLoopForIO::WATCH_READ, fd, callback)); | 201 return WrapUnique(new Controller(MessageLoopForIO::WATCH_READ, fd, callback)); |
202 } | 202 } |
203 | 203 |
204 std::unique_ptr<FileDescriptorWatcher::Controller> | 204 std::unique_ptr<FileDescriptorWatcher::Controller> |
205 FileDescriptorWatcher::WatchWritable(int fd, const Closure& callback) { | 205 FileDescriptorWatcher::WatchWritable(int fd, const Closure& callback) { |
206 return WrapUnique( | 206 return WrapUnique( |
207 new Controller(MessageLoopForIO::WATCH_WRITE, fd, callback)); | 207 new Controller(MessageLoopForIO::WATCH_WRITE, fd, callback)); |
208 } | 208 } |
209 | 209 |
210 } // namespace base | 210 } // namespace base |
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