1 /*****************************************************************************
3 *****************************************************************************
4 * Copyright (C) 2003 the VideoLAN team
7 * Authors: Cyril Deguet <asmax@via.ecp.fr>
8 * Olivier Teulière <ipkiss@via.ecp.fr>
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
23 *****************************************************************************/
29 /// Reference couting pointer
30 template <class T> class CountedPtr
33 explicit CountedPtr( T *pPtr = 0 ): m_pCounter( 0 )
35 if( pPtr ) m_pCounter = new Counter( pPtr );
38 ~CountedPtr() { release(); }
40 CountedPtr(const CountedPtr &rPtr ) { acquire( rPtr.m_pCounter ); }
42 CountedPtr &operator=( const CountedPtr &rPtr )
47 acquire( rPtr.m_pCounter );
52 T &operator*() const { return *m_pCounter->m_pPtr; }
54 T *operator->() const {return m_pCounter->m_pPtr; }
56 T *get() const { return m_pCounter ? m_pCounter->m_pPtr : 0; }
60 return ( m_pCounter ? m_pCounter->m_count == 1 : true );
66 Counter( T* pPtr = 0, unsigned int c = 1 ):
67 m_pPtr( pPtr ), m_count( c ) {}
72 void acquire( Counter* pCount )
75 if( pCount ) ++pCount->m_count;
82 if( --m_pCounter->m_count == 0 )
84 delete m_pCounter->m_pPtr;