inspiration/ETL/ETL/_mutex_pthreads_simple.h

/*! ========================================================================
** Extended Template and Library
** Mutex Abstraction Class Implementation
**
** Copyright (c) 2002 Robert B. Quattlebaum Jr.
** Copyright (c) 2008 Chris Moore
**
** This package is free software; you can redistribute it and/or
** modify it under the terms of the GNU General Public License as
** published by the Free Software Foundation; either version 2 of
** the License, or (at your option) any later version.
**
** This package is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
** General Public License for more details.
**
** === N O T E S ===========================================================
**
** This is an internal header file, included by other ETL headers.
** You should not attempt to use it directly.
**
** ========================================================================= */

#ifndef __ETL__MUTEX_PTHREADS_SIMPLE_H_
#define __ETL__MUTEX_PTHREADS_SIMPLE_H_

#include <pthread.h>

_ETL_BEGIN_NAMESPACE

class mutex
{
    pthread_mutex_t	mtx;
public:
    mutex()
    {
        pthread_mutex_init(&mtx, NULL);
    }
    ~mutex()
    {
        pthread_mutex_destroy(&mtx);
    }
    void	lock_mutex()
    {
        pthread_mutex_lock(&mtx);
    }
    void	unlock_mutex()
    {
        pthread_mutex_unlock(&mtx);
    }

    // Exception-safe mutex lock class
    class lock
    {
        mutex *_mtx;
    public:
        lock(mutex &x): _mtx(&x)
        {
            _mtx->lock_mutex();
        }
        ~lock()
        {
            _mtx->unlock_mutex();
        }
    };
};

_ETL_END_NAMESPACE

#endif