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| 1 // Copyright (c) 2011 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2011 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/synchronization/waitable_event.h" | 5 #include <stdbool.h> |
| 6 #include <stddef.h> |
| 7 #include <algorithm> |
| 8 #include <list> |
| 9 #include <utility> |
| 10 #include <vector> |
| 6 | 11 |
| 12 #include "base/logging.h" |
| 13 #include "base/ref_counted.h" |
| 7 #include "base/synchronization/condition_variable.h" | 14 #include "base/synchronization/condition_variable.h" |
| 8 #include "base/synchronization/lock.h" | 15 #include "base/synchronization/lock.h" |
| 9 #include "base/message_loop.h" | 16 #include "base/synchronization/waitable_event.h" |
| 17 #include "base/time.h" |
| 10 | 18 |
| 11 // ----------------------------------------------------------------------------- | 19 // ----------------------------------------------------------------------------- |
| 12 // A WaitableEvent on POSIX is implemented as a wait-list. Currently we don't | 20 // A WaitableEvent on POSIX is implemented as a wait-list. Currently we don't |
| 13 // support cross-process events (where one process can signal an event which | 21 // support cross-process events (where one process can signal an event which |
| 14 // others are waiting on). Because of this, we can avoid having one thread per | 22 // others are waiting on). Because of this, we can avoid having one thread per |
| 15 // listener in several cases. | 23 // listener in several cases. |
| 16 // | 24 // |
| 17 // The WaitableEvent maintains a list of waiters, protected by a lock. Each | 25 // The WaitableEvent maintains a list of waiters, protected by a lock. Each |
| 18 // waiter is either an async wait, in which case we have a Task and the | 26 // waiter is either an async wait, in which case we have a Task and the |
| 19 // MessageLoop to run it on, or a blocking wait, in which case we have the | 27 // MessageLoop to run it on, or a blocking wait, in which case we have the |
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| 392 return true; | 400 return true; |
| 393 } | 401 } |
| 394 } | 402 } |
| 395 | 403 |
| 396 return false; | 404 return false; |
| 397 } | 405 } |
| 398 | 406 |
| 399 // ----------------------------------------------------------------------------- | 407 // ----------------------------------------------------------------------------- |
| 400 | 408 |
| 401 } // namespace base | 409 } // namespace base |
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