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1 // Copyright 2011 The Chromium Authors. All rights reserved. | 1 // Copyright 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 #ifndef CCCompletionEvent_h | 5 #ifndef CCCompletionEvent_h |
6 #define CCCompletionEvent_h | 6 #define CCCompletionEvent_h |
7 | 7 |
8 #include "base/synchronization/waitable_event.h" | 8 #include "base/synchronization/waitable_event.h" |
| 9 #include "cc/dcheck.h" |
9 | 10 |
10 namespace cc { | 11 namespace cc { |
11 | 12 |
12 // Used for making blocking calls from one thread to another. Use only when | 13 // Used for making blocking calls from one thread to another. Use only when |
13 // absolutely certain that doing-so will not lead to a deadlock. | 14 // absolutely certain that doing-so will not lead to a deadlock. |
14 // | 15 // |
15 // It is safe to destroy this object as soon as wait() returns. | 16 // It is safe to destroy this object as soon as wait() returns. |
16 class CCCompletionEvent { | 17 class CCCompletionEvent { |
17 public: | 18 public: |
18 CCCompletionEvent() | 19 CCCompletionEvent() |
19 : m_event(false /* manual_reset */, false /* initially_signaled */) | 20 : m_event(false /* manual_reset */, false /* initially_signaled */) |
20 { | 21 { |
21 #ifndef NDEBUG | 22 #if CC_DCHECK_ENABLED |
22 m_waited = false; | 23 m_waited = false; |
23 m_signaled = false; | 24 m_signaled = false; |
24 #endif | 25 #endif |
25 } | 26 } |
26 | 27 |
27 ~CCCompletionEvent() | 28 ~CCCompletionEvent() |
28 { | 29 { |
29 ASSERT(m_waited); | 30 CC_DCHECK(m_waited); |
30 ASSERT(m_signaled); | 31 CC_DCHECK(m_signaled); |
31 } | 32 } |
32 | 33 |
33 void wait() | 34 void wait() |
34 { | 35 { |
35 ASSERT(!m_waited); | 36 CC_DCHECK(!m_waited); |
36 #ifndef NDEBUG | 37 #if CC_DCHECK_ENABLED |
37 m_waited = true; | 38 m_waited = true; |
38 #endif | 39 #endif |
39 m_event.Wait(); | 40 m_event.Wait(); |
40 } | 41 } |
41 | 42 |
42 void signal() | 43 void signal() |
43 { | 44 { |
44 ASSERT(!m_signaled); | 45 CC_DCHECK(!m_signaled); |
45 #ifndef NDEBUG | 46 #if CC_DCHECK_ENABLED |
46 m_signaled = true; | 47 m_signaled = true; |
47 #endif | 48 #endif |
48 m_event.Signal(); | 49 m_event.Signal(); |
49 } | 50 } |
50 | 51 |
51 private: | 52 private: |
52 base::WaitableEvent m_event; | 53 base::WaitableEvent m_event; |
53 #ifndef NDEBUG | 54 #if CC_DCHECK_ENABLED |
54 // Used to assert that wait() and signal() are each called exactly once. | 55 // Used to assert that wait() and signal() are each called exactly once. |
55 bool m_waited; | 56 bool m_waited; |
56 bool m_signaled; | 57 bool m_signaled; |
57 #endif | 58 #endif |
58 }; | 59 }; |
59 | 60 |
60 } | 61 } |
61 | 62 |
62 #endif | 63 #endif |
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