src/scoped_lock.h

   1 ///
   2 /// \file       scoped_lock.h
   3 ///             Simple scope class for dealing with pthread mutex locking.
   4 ///
   5
   6 /*
   7     Copyright (C) 2008-2009, Net Direct Inc. (http://www.netdirect.ca/)
   8
   9     This program is free software; you can redistribute it and/or modify
  10     it under the terms of the GNU General Public License as published by
  11     the Free Software Foundation; either version 2 of the License, or
  12     (at your option) any later version.
  13
  14     This program is distributed in the hope that it will be useful,
  15     but WITHOUT ANY WARRANTY; without even the implied warranty of
  16     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
  17
  18     See the GNU General Public License in the COPYING file at the
  19     root directory of this project for more details.
  20 */
  21
  22 #ifndef __BARRY_SCOPED_LOCK_H__
  23 #define __BARRY_SCOPED_LOCK_H__
  24
  25 #include <pthread.h>
  26
  27 namespace Barry {
  28
  29 class scoped_lock
  30 {
  31         pthread_mutex_t *m_mutex;
  32
  33 public:
  34         scoped_lock(pthread_mutex_t &mutex)
  35                 : m_mutex(&mutex)
  36         {
  37                 while( pthread_mutex_lock(m_mutex) != 0 )
  38                         ;
  39         }
  40
  41         ~scoped_lock()
  42         {
  43                 unlock();
  44         }
  45
  46         void unlock()
  47         {
  48                 if( m_mutex ) {
  49                         pthread_mutex_unlock(m_mutex);
  50                         m_mutex = 0;
  51                 }
  52         }
  53 };
  54
  55 } // namespace Barry
  56
  57 #endif
  58