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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() = default; | 13 WaitableEventWatcher::WaitableEventWatcher() = default; |
14 | 14 |
15 WaitableEventWatcher::~WaitableEventWatcher() { | 15 WaitableEventWatcher::~WaitableEventWatcher() { |
16 } | 16 } |
17 | 17 |
18 bool WaitableEventWatcher::StartWatching( | 18 bool WaitableEventWatcher::StartWatching(WaitableEvent* event, |
19 WaitableEvent* event, | 19 EventCallback callback) { |
20 const EventCallback& callback) { | 20 callback_ = std::move(callback); |
21 callback_ = callback; | |
22 event_ = event; | 21 event_ = event; |
23 return watcher_.StartWatchingOnce(event->handle(), this); | 22 return watcher_.StartWatchingOnce(event->handle(), this); |
24 } | 23 } |
25 | 24 |
26 void WaitableEventWatcher::StopWatching() { | 25 void WaitableEventWatcher::StopWatching() { |
27 callback_.Reset(); | 26 callback_.Reset(); |
28 event_ = NULL; | 27 event_ = NULL; |
29 watcher_.StopWatching(); | 28 watcher_.StopWatching(); |
30 } | 29 } |
31 | 30 |
32 void WaitableEventWatcher::OnObjectSignaled(HANDLE h) { | 31 void WaitableEventWatcher::OnObjectSignaled(HANDLE h) { |
33 WaitableEvent* event = event_; | 32 WaitableEvent* event = event_; |
34 EventCallback callback = callback_; | 33 EventCallback callback = std::move(callback_); |
35 event_ = NULL; | 34 event_ = NULL; |
36 callback_.Reset(); | |
37 DCHECK(event); | 35 DCHECK(event); |
38 | 36 |
39 callback.Run(event); | 37 std::move(callback).Run(event); |
40 } | 38 } |
41 | 39 |
42 } // namespace base | 40 } // namespace base |
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