_rwlock.h

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/* === S T A R T =========================================================== */

#ifndef __ETL__RWLOCK_H_
#define __ETL__RWLOCK_H_

/* === H E A D E R S ======================================================= */

/* === M A C R O S ========================================================= */

/* === C L A S S E S & S T R U C T S ======================================= */

_ETL_BEGIN_NAMESPACE

class read_write_lock : private Mutex
{
public:

    read_write_lock()
    {  }

    ~read_write_lock()
    {  }

    class read_lock
    {
        read_write_lock *_mtx;
    public:
        read_lock(read_write_lock &x):_mtx(&x) { _mtx->lock_read(); }
        ~read_lock() { _mtx->unlock_read(); }
        read_write_lock &get() { return *_mtx; }
    };

    class write_lock
    {
        read_write_lock *_mtx;
    public:
        write_lock(read_write_lock &x):_mtx(&x) { _mtx->lock_write(); }
        ~read_lock() { _mtx->unlock_write(); }
        read_write_lock &get() { return *_mtx; }
    };

    void lock_read(void)
    { lock_mutex(); }

    void lock_write(void)
    { lock_mutex(); }

    bool try_lock_read(void)
    { return try_lock_mutex(); }

    bool try_lock_write(void)
    { return try_lock_mutex(); }

    void unlock_write(void)
    { unlock_mutex(); }

    void unlock_read(void)
    { unlock_mutex(); }
};

_ETL_END_NAMESPACE

/* === E X T E R N S ======================================================= */

/* === E N D =============================================================== */

#endif