include/RefCountable.h
00001 /* 00002 ** Tanl 00003 ** include/RefCountable.h 00004 ** ---------------------------------------------------------------------- 00005 ** Copyright (c) 2008 Giuseppe Attardi (attardi@di.unipi.it). 00006 ** ---------------------------------------------------------------------- 00007 ** 00008 ** This file is part of Tanl. 00009 ** 00010 ** Tanl is free software; you can redistribute it and/or modify it 00011 ** under the terms of the GNU General Public License, version 3, 00012 ** as published by the Free Software Foundation. 00013 ** 00014 ** Tanl 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. See the 00017 ** GNU General Public License for more details. 00018 ** 00019 ** You should have received a copy of the GNU General Public License 00020 ** along with this program. If not, see <http://www.gnu.org/licenses/>. 00021 ** ---------------------------------------------------------------------- 00022 */ 00023 00024 #ifndef Tanl_RefCountable_H 00025 #define Tanl_RefCountable_H 00026 00027 #include "Enumerator.h" 00028 00029 namespace Tanl { 00030 00034 struct RefCountable { 00035 RefCountable() : 00036 refCount(0) 00037 { } 00038 00039 virtual ~RefCountable() { } 00040 00041 unsigned refCount; 00042 unsigned incRef() { return ++refCount; } 00043 unsigned decRef() { 00044 if (--refCount == 0) { delete this; return 0; } 00045 else return refCount; 00046 } 00047 }; 00048 00049 } // namespace Tanl 00050 00051 #endif // Tanl_RefCountable_H