00001 // SuperTux 00002 // Copyright (C) 2006 Matthias Braun <matze@braunis.de> 00003 // 00004 // This program is free software: you can redistribute it and/or modify 00005 // it under the terms of the GNU General Public License as published by 00006 // the Free Software Foundation, either version 3 of the License, or 00007 // (at your option) any later version. 00008 // 00009 // This program is distributed in the hope that it will be useful, 00010 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00011 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00012 // GNU General Public License for more details. 00013 // 00014 // You should have received a copy of the GNU General Public License 00015 // along with this program. If not, see <http://www.gnu.org/licenses/>. 00016 00017 #ifndef HEADER_SUPERTUX_UTIL_REF_HPP 00018 #define HEADER_SUPERTUX_UTIL_REF_HPP 00019 00024 template<typename T> 00025 class Ref 00026 { 00027 public: 00028 Ref(T* object = 0) 00029 : object(object) 00030 { 00031 if(object) 00032 object->ref(); 00033 } 00034 Ref(const Ref<T>& other) 00035 : object(other.object) 00036 { 00037 if(object) 00038 object->ref(); 00039 } 00040 ~Ref() 00041 { 00042 if(object) 00043 object->unref(); 00044 } 00045 00046 Ref<T>& operator= (const Ref<T>& other) 00047 { 00048 *this = other.get(); 00049 return *this; 00050 } 00051 00052 Ref<T>& operator= (T* object) 00053 { 00054 if(object) 00055 object->ref(); 00056 if(this->object) 00057 this->object->unref(); 00058 this->object = object; 00059 00060 return *this; 00061 } 00062 00063 T* operator ->() const 00064 { 00065 return object; 00066 } 00067 00068 T& operator* () const 00069 { 00070 return *object; 00071 } 00072 00073 operator const T* () const 00074 { 00075 return object; 00076 } 00077 00078 T* get() const 00079 { 00080 return object; 00081 } 00082 00083 private: 00084 T* object; 00085 }; 00086 00087 #endif 00088 00089 /* EOF */