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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_watcher.h" | 5 #include "base/synchronization/waitable_event_watcher.h" |
| 6 | 6 |
| 7 #include "base/compiler_specific.h" | 7 #include "base/compiler_specific.h" |
| 8 #include "base/synchronization/waitable_event.h" | 8 #include "base/synchronization/waitable_event.h" |
| 9 #include "base/win/object_watcher.h" | 9 #include "base/win/object_watcher.h" |
| 10 | 10 |
| 11 namespace base { | 11 namespace base { |
| 12 | 12 |
| 13 WaitableEventWatcher::WaitableEventWatcher() | 13 WaitableEventWatcher::WaitableEventWatcher() |
| 14 : event_(NULL) { | 14 : event_(NULL) { |
| 15 } | 15 } |
| 16 | 16 |
| 17 WaitableEventWatcher::~WaitableEventWatcher() { | 17 WaitableEventWatcher::~WaitableEventWatcher() { |
| 18 } | 18 } |
| 19 | 19 |
| 20 bool WaitableEventWatcher::StartWatching( | 20 bool WaitableEventWatcher::StartWatching( |
| 21 WaitableEvent* event, | 21 WaitableEvent* event, |
| 22 const EventCallback& callback) { | 22 const EventCallback& callback) { |
| 23 callback_ = callback; | 23 callback_ = callback; |
| 24 event_ = event; | 24 event_ = event; |
| 25 return watcher_.StartWatching(event->handle(), this); | 25 return watcher_.StartWatching(event->handle(), this, false); |
| 26 } | 26 } |
| 27 | 27 |
| 28 void WaitableEventWatcher::StopWatching() { | 28 void WaitableEventWatcher::StopWatching() { |
| 29 callback_.Reset(); | 29 callback_.Reset(); |
| 30 event_ = NULL; | 30 event_ = NULL; |
| 31 watcher_.StopWatching(); | 31 watcher_.StopWatching(); |
| 32 } | 32 } |
| 33 | 33 |
| 34 WaitableEvent* WaitableEventWatcher::GetWatchedEvent() { | 34 WaitableEvent* WaitableEventWatcher::GetWatchedEvent() { |
| 35 return event_; | 35 return event_; |
| 36 } | 36 } |
| 37 | 37 |
| 38 void WaitableEventWatcher::OnObjectSignaled(HANDLE h) { | 38 void WaitableEventWatcher::OnObjectSignaled(HANDLE h) { |
| 39 WaitableEvent* event = event_; | 39 WaitableEvent* event = event_; |
| 40 EventCallback callback = callback_; | 40 EventCallback callback = callback_; |
| 41 event_ = NULL; | 41 event_ = NULL; |
| 42 callback_.Reset(); | 42 callback_.Reset(); |
| 43 DCHECK(event); | 43 DCHECK(event); |
| 44 | 44 |
| 45 callback.Run(event); | 45 callback.Run(event); |
| 46 } | 46 } |
| 47 | 47 |
| 48 } // namespace base | 48 } // namespace base |
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