| /* |
| * Copyright (c) 2011 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| #ifndef WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CRITICAL_SECTION_WRAPPER_H_ |
| #define WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CRITICAL_SECTION_WRAPPER_H_ |
| |
| // If the critical section is heavily contended it may be beneficial to use |
| // read/write locks instead. |
| |
| #include "webrtc/base/thread_annotations.h" |
| #include "webrtc/common_types.h" |
| |
| namespace webrtc { |
| class LOCKABLE CriticalSectionWrapper { |
| public: |
| // Factory method, constructor disabled |
| static CriticalSectionWrapper* CreateCriticalSection(); |
| |
| virtual ~CriticalSectionWrapper() {} |
| |
| // Tries to grab lock, beginning of a critical section. Will wait for the |
| // lock to become available if the grab failed. |
| virtual void Enter() EXCLUSIVE_LOCK_FUNCTION() = 0; |
| |
| // Returns a grabbed lock, end of critical section. |
| virtual void Leave() UNLOCK_FUNCTION() = 0; |
| }; |
| |
| // RAII extension of the critical section. Prevents Enter/Leave mismatches and |
| // provides more compact critical section syntax. |
| class SCOPED_LOCKABLE CriticalSectionScoped { |
| public: |
| explicit CriticalSectionScoped(CriticalSectionWrapper* critsec) |
| EXCLUSIVE_LOCK_FUNCTION(critsec) |
| : ptr_crit_sec_(critsec) { |
| ptr_crit_sec_->Enter(); |
| } |
| |
| ~CriticalSectionScoped() UNLOCK_FUNCTION() { ptr_crit_sec_->Leave(); } |
| |
| private: |
| CriticalSectionWrapper* ptr_crit_sec_; |
| }; |
| |
| } // namespace webrtc |
| |
| #endif // WEBRTC_SYSTEM_WRAPPERS_INCLUDE_CRITICAL_SECTION_WRAPPER_H_ |