| /* |
| * 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_SOURCE_RW_LOCK_WINDOWS_H_ |
| #define WEBRTC_SYSTEM_WRAPPERS_SOURCE_RW_LOCK_WINDOWS_H_ |
| |
| #include "rw_lock_wrapper.h" |
| |
| #include <Windows.h> |
| |
| #if !defined(RTL_SRWLOCK_INIT) |
| typedef struct _RTL_SRWLOCK |
| { |
| void* Ptr; |
| } RTL_SRWLOCK, *PRTL_SRWLOCK; |
| typedef RTL_SRWLOCK SRWLOCK, *PSRWLOCK; |
| #endif |
| |
| namespace webrtc { |
| class CriticalSectionWrapper; |
| class ConditionVariableWrapper; |
| |
| typedef void (WINAPI *PInitializeSRWLock)(PSRWLOCK); |
| |
| typedef void (WINAPI *PAcquireSRWLockExclusive)(PSRWLOCK); |
| typedef void (WINAPI *PReleaseSRWLockExclusive)(PSRWLOCK); |
| |
| typedef void (WINAPI *PAcquireSRWLockShared)(PSRWLOCK); |
| typedef void (WINAPI *PReleaseSRWLockShared)(PSRWLOCK); |
| |
| |
| class RWLockWindows :public RWLockWrapper |
| { |
| public: |
| RWLockWindows(); |
| virtual ~RWLockWindows(); |
| |
| virtual void AcquireLockExclusive(); |
| virtual void ReleaseLockExclusive(); |
| |
| virtual void AcquireLockShared(); |
| virtual void ReleaseLockShared(); |
| |
| protected: |
| virtual int Init(); |
| |
| private: |
| // For native implementation. |
| static bool _winSupportRWLockPrimitive; |
| SRWLOCK _lock; |
| |
| // Genric implementation, fallback if native is not supported. |
| CriticalSectionWrapper* _critSectPtr; |
| ConditionVariableWrapper* _readCondPtr; |
| ConditionVariableWrapper* _writeCondPtr; |
| |
| int _readersActive; |
| bool _writerActive; |
| int _readersWaiting; |
| int _writersWaiting; |
| }; |
| } // namespace webrtc |
| |
| #endif // WEBRTC_SYSTEM_WRAPPERS_SOURCE_RW_LOCK_WINDOWS_H_ |