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/*
* 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_
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