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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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