// Copyright (C) 2003 Intel Corporation

#ifndef _RW_LOCK_H_
#define _RW_LOCK_H_

#include "Semaphore.h"

class RWLock {

public:

    enum RWMode {
		READ_ONLY,
		READ_WRITE
    };
    
    RWLock();
    ~RWLock() {}

    void acquire(const RWMode mode_p = READ_ONLY);
    void release();
    void switch2RO();

private:

    Semaphore _readSem;
    Semaphore _writeSem;
    Semaphore _countSem;
    unsigned int _counter;
};


#endif //_RW_LOCK_H_