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1 /* | |
2 * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. | |
3 * | |
4 * Use of this source code is governed by a BSD-style license | |
5 * that can be found in the LICENSE file in the root of the source | |
6 * tree. An additional intellectual property rights grant can be found | |
7 * in the file PATENTS. All contributing project authors may | |
8 * be found in the AUTHORS file in the root of the source tree. | |
9 */ | |
10 | |
11 #ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CRITICAL_SECTION_WRAPPER_H_ | |
12 #define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CRITICAL_SECTION_WRAPPER_H_ | |
13 | |
14 #include "webrtc/base/criticalsection.h" | |
15 #include "webrtc/base/thread_annotations.h" | |
16 #include "webrtc/common_types.h" | |
17 | |
18 namespace webrtc { | |
19 | |
20 class LOCKABLE CriticalSectionWrapper { | |
21 public: | |
22 // Legacy factory method, being deprecated. Please use the constructor. | |
23 // TODO(tommi): Remove the CriticalSectionWrapper class and move users over | |
24 // to using rtc::CriticalSection. | |
25 static CriticalSectionWrapper* CreateCriticalSection() { | |
26 return new CriticalSectionWrapper(); | |
27 } | |
28 | |
29 CriticalSectionWrapper() {} | |
30 ~CriticalSectionWrapper() {} | |
31 | |
32 // Tries to grab lock, beginning of a critical section. Will wait for the | |
33 // lock to become available if the grab failed. | |
34 void Enter() EXCLUSIVE_LOCK_FUNCTION() { lock_.Enter(); } | |
35 | |
36 // Returns a grabbed lock, end of critical section. | |
37 void Leave() UNLOCK_FUNCTION() { lock_.Leave(); } | |
38 | |
39 private: | |
40 rtc::CriticalSection lock_; | |
41 }; | |
42 | |
43 // RAII extension of the critical section. Prevents Enter/Leave mismatches and | |
44 // provides more compact critical section syntax. | |
45 class SCOPED_LOCKABLE CriticalSectionScoped { | |
46 public: | |
47 explicit CriticalSectionScoped(CriticalSectionWrapper* critsec) | |
48 EXCLUSIVE_LOCK_FUNCTION(critsec) | |
49 : ptr_crit_sec_(critsec) { | |
50 ptr_crit_sec_->Enter(); | |
51 } | |
52 | |
53 ~CriticalSectionScoped() UNLOCK_FUNCTION() { ptr_crit_sec_->Leave(); } | |
54 | |
55 private: | |
56 CriticalSectionWrapper* ptr_crit_sec_; | |
57 }; | |
58 | |
59 } // namespace webrtc | |
60 | |
61 #endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CRITICAL_SECTION_WRAPPER_H_ | |
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