72 lines
1.9 KiB
C++
72 lines
1.9 KiB
C++
/*
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* Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef WEBRTC_SYSTEM_WRAPPERS_SOURCE_RW_LOCK_WINDOWS_H_
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#define WEBRTC_SYSTEM_WRAPPERS_SOURCE_RW_LOCK_WINDOWS_H_
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#include "rw_lock_wrapper.h"
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#include <Windows.h>
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#if !defined(RTL_SRWLOCK_INIT)
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typedef struct _RTL_SRWLOCK
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{
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void* Ptr;
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} RTL_SRWLOCK, *PRTL_SRWLOCK;
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typedef RTL_SRWLOCK SRWLOCK, *PSRWLOCK;
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#endif
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namespace webrtc {
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class CriticalSectionWrapper;
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class ConditionVariableWrapper;
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typedef void (WINAPI *PInitializeSRWLock)(PSRWLOCK);
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typedef void (WINAPI *PAcquireSRWLockExclusive)(PSRWLOCK);
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typedef void (WINAPI *PReleaseSRWLockExclusive)(PSRWLOCK);
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typedef void (WINAPI *PAcquireSRWLockShared)(PSRWLOCK);
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typedef void (WINAPI *PReleaseSRWLockShared)(PSRWLOCK);
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class RWLockWindows :public RWLockWrapper
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{
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public:
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RWLockWindows();
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virtual ~RWLockWindows();
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virtual void AcquireLockExclusive();
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virtual void ReleaseLockExclusive();
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virtual void AcquireLockShared();
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virtual void ReleaseLockShared();
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protected:
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virtual int Init();
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private:
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// For native implementation.
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static bool _winSupportRWLockPrimitive;
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SRWLOCK _lock;
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// Genric implementation, fallback if native is not supported.
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CriticalSectionWrapper* _critSectPtr;
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ConditionVariableWrapper* _readCondPtr;
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ConditionVariableWrapper* _writeCondPtr;
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int _readersActive;
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bool _writerActive;
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int _readersWaiting;
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int _writersWaiting;
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};
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} // namespace webrtc
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#endif // WEBRTC_SYSTEM_WRAPPERS_SOURCE_RW_LOCK_WINDOWS_H_
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