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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 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 #ifndef BASE_MESSAGE_LOOP_H_ | 5 #ifndef BASE_MESSAGE_LOOP_H_ |
6 #define BASE_MESSAGE_LOOP_H_ | 6 #define BASE_MESSAGE_LOOP_H_ |
7 #pragma once | 7 #pragma once |
8 | 8 |
9 #include <queue> | 9 #include <queue> |
10 #include <string> | 10 #include <string> |
11 | 11 |
12 #include "base/base_export.h" | 12 #include "base/base_export.h" |
13 #include "base/basictypes.h" | 13 #include "base/basictypes.h" |
14 #include "base/callback_forward.h" | 14 #include "base/callback_forward.h" |
15 #include "base/sequenced_task_runner_helpers.h" | |
willchan no longer on Chromium
2012/02/09 20:50:50
sort
akalin
2012/02/10 22:48:59
Done.
| |
15 #include "base/location.h" | 16 #include "base/location.h" |
16 #include "base/memory/ref_counted.h" | 17 #include "base/memory/ref_counted.h" |
17 #include "base/message_loop_helpers.h" | |
18 #include "base/message_loop_proxy.h" | 18 #include "base/message_loop_proxy.h" |
19 #include "base/message_pump.h" | 19 #include "base/message_pump.h" |
20 #include "base/observer_list.h" | 20 #include "base/observer_list.h" |
21 #include "base/pending_task.h" | 21 #include "base/pending_task.h" |
22 #include "base/synchronization/lock.h" | 22 #include "base/synchronization/lock.h" |
23 #include "base/tracking_info.h" | 23 #include "base/tracking_info.h" |
24 #include "base/time.h" | 24 #include "base/time.h" |
25 | 25 |
26 #if defined(OS_WIN) | 26 #if defined(OS_WIN) |
27 // We need this to declare base::MessagePumpWin::Dispatcher, which we should | 27 // We need this to declare base::MessagePumpWin::Dispatcher, which we should |
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191 // if the object needs to live until the next run of the MessageLoop (for | 191 // if the object needs to live until the next run of the MessageLoop (for |
192 // example, deleting a RenderProcessHost from within an IPC callback is not | 192 // example, deleting a RenderProcessHost from within an IPC callback is not |
193 // good). | 193 // good). |
194 // | 194 // |
195 // NOTE: This method may be called on any thread. The object will be deleted | 195 // NOTE: This method may be called on any thread. The object will be deleted |
196 // on the thread that executes MessageLoop::Run(). If this is not the same | 196 // on the thread that executes MessageLoop::Run(). If this is not the same |
197 // as the thread that calls PostDelayedTask(FROM_HERE, ), then T MUST inherit | 197 // as the thread that calls PostDelayedTask(FROM_HERE, ), then T MUST inherit |
198 // from RefCountedThreadSafe<T>! | 198 // from RefCountedThreadSafe<T>! |
199 template <class T> | 199 template <class T> |
200 void DeleteSoon(const tracked_objects::Location& from_here, const T* object) { | 200 void DeleteSoon(const tracked_objects::Location& from_here, const T* object) { |
201 base::subtle::DeleteHelperInternal<T, void>::DeleteOnMessageLoop( | 201 base::subtle::DeleteHelperInternal<T, void>::DeleteViaSequencedTaskRunner( |
202 this, from_here, object); | 202 this, from_here, object); |
203 } | 203 } |
204 | 204 |
205 // A variant on PostTask that releases the given reference counted object | 205 // A variant on PostTask that releases the given reference counted object |
206 // (by calling its Release method). This is useful if the object needs to | 206 // (by calling its Release method). This is useful if the object needs to |
207 // live until the next run of the MessageLoop, or if the object needs to be | 207 // live until the next run of the MessageLoop, or if the object needs to be |
208 // released on a particular thread. | 208 // released on a particular thread. |
209 // | 209 // |
210 // NOTE: This method may be called on any thread. The object will be | 210 // NOTE: This method may be called on any thread. The object will be |
211 // released (and thus possibly deleted) on the thread that executes | 211 // released (and thus possibly deleted) on the thread that executes |
212 // MessageLoop::Run(). If this is not the same as the thread that calls | 212 // MessageLoop::Run(). If this is not the same as the thread that calls |
213 // PostDelayedTask(FROM_HERE, ), then T MUST inherit from | 213 // PostDelayedTask(FROM_HERE, ), then T MUST inherit from |
214 // RefCountedThreadSafe<T>! | 214 // RefCountedThreadSafe<T>! |
215 template <class T> | 215 template <class T> |
216 void ReleaseSoon(const tracked_objects::Location& from_here, | 216 void ReleaseSoon(const tracked_objects::Location& from_here, |
217 const T* object) { | 217 const T* object) { |
218 base::subtle::ReleaseHelperInternal<T, void>::ReleaseOnMessageLoop( | 218 base::subtle::ReleaseHelperInternal<T, void>::ReleaseViaSequencedTaskRunner( |
219 this, from_here, object); | 219 this, from_here, object); |
220 } | 220 } |
221 | 221 |
222 // Run the message loop. | 222 // Run the message loop. |
223 void Run(); | 223 void Run(); |
224 | 224 |
225 // Process all pending tasks, windows messages, etc., but don't wait/sleep. | 225 // Process all pending tasks, windows messages, etc., but don't wait/sleep. |
226 // Return as soon as all items that can be run are taken care of. | 226 // Return as soon as all items that can be run are taken care of. |
227 void RunAllPending(); | 227 void RunAllPending(); |
228 | 228 |
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659 #endif // defined(OS_POSIX) | 659 #endif // defined(OS_POSIX) |
660 }; | 660 }; |
661 | 661 |
662 // Do not add any member variables to MessageLoopForIO! This is important b/c | 662 // Do not add any member variables to MessageLoopForIO! This is important b/c |
663 // MessageLoopForIO is often allocated via MessageLoop(TYPE_IO). Any extra | 663 // MessageLoopForIO is often allocated via MessageLoop(TYPE_IO). Any extra |
664 // data that you need should be stored on the MessageLoop's pump_ instance. | 664 // data that you need should be stored on the MessageLoop's pump_ instance. |
665 COMPILE_ASSERT(sizeof(MessageLoop) == sizeof(MessageLoopForIO), | 665 COMPILE_ASSERT(sizeof(MessageLoop) == sizeof(MessageLoopForIO), |
666 MessageLoopForIO_should_not_have_extra_member_variables); | 666 MessageLoopForIO_should_not_have_extra_member_variables); |
667 | 667 |
668 #endif // BASE_MESSAGE_LOOP_H_ | 668 #endif // BASE_MESSAGE_LOOP_H_ |
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