# scoped_lock.h

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    00001 ///
    00002 /// \file       scoped_lock.h
    00003 ///             Simple scope class for dealing with pthread mutex locking.
    00004 ///
    00005
    00006 /*
    00007     Copyright (C) 2008-2011, Net Direct Inc. (http://www.netdirect.ca/)
    00008
    00009     This program is free software; you can redistribute it and/or modify
    00010     it under the terms of the GNU General Public License as published by
    00011     the Free Software Foundation; either version 2 of the License, or
    00012     (at your option) any later version.
    00013
    00014     This program is distributed in the hope that it will be useful,
    00015     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00016     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
    00017
    00018     See the GNU General Public License in the COPYING file at the
    00019     root directory of this project for more details.
    00020 */
    00021
    00022 #ifndef __BARRY_SCOPED_LOCK_H__
    00023 #define __BARRY_SCOPED_LOCK_H__
    00024
    00025 #include <pthread.h>
    00026
    00027 namespace Barry {
    00028
    00029 class scoped_lock
    00030 {
    00031         pthread_mutex_t *m_mutex;
    00032
    00033 public:
    00034         scoped_lock(pthread_mutex_t &mutex)
    00035                 : m_mutex(&mutex)
    00036         {
    00037                 while( pthread_mutex_lock(m_mutex) != 0 )
    00038                         ;
    00039         }
    00040
    00041         ~scoped_lock()
    00042         {
    00043                 unlock();
    00044         }
    00045
    00046         void unlock()
    00047         {
    00048                 if( m_mutex ) {
    00049                         pthread_mutex_unlock(m_mutex);
    00050                         m_mutex = 0;
    00051                 }
    00052         }
    00053 };
    00054
    00055 } // namespace Barry
    00056
    00057 #endif
    00058