TonicTones
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00001 // Singleton.h 00002 // 00003 // Copyright 2010 Jérémy Laumon <jeremy.laumon@gmail.com> 00004 // 00005 // This program is free software; you can redistribute it and/or modify 00006 // it under the terms of the GNU General Public License as published by 00007 // the Free Software Foundation; either version 2 of the License, or 00008 // (at your option) any later version. 00009 // 00010 // This program is distributed in the hope that it will be useful, 00011 // but WITHOUT ANY WARRANTY; without even the implied warranty of 00012 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 00013 // GNU General Public License for more details. 00014 // 00015 // You should have received a copy of the GNU General Public License 00016 // along with this program; if not, write to the Free Software 00017 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, 00018 // MA 02110-1301, USA. 00019 00020 #ifndef SINGLETON_H 00021 #define SINGLETON_H 00022 00030 template <typename T> 00031 class Singleton 00032 { 00033 protected: 00034 Singleton() {} 00035 ~Singleton() {} 00036 00037 public: 00038 00042 static T *instance() 00043 { 00044 if (NULL == inst) 00045 { 00046 inst = new T; 00047 } 00048 return (static_cast<T*> (inst)); 00049 } 00050 00054 static void destroy() 00055 { 00056 if (NULL != inst) 00057 { 00058 delete inst; 00059 inst = NULL; 00060 } 00061 } 00062 00063 private: 00064 static T *inst; 00065 00066 Singleton(const Singleton&); 00067 Singleton& operator =(const Singleton&); 00068 }; 00069 00070 template <typename T> 00071 T *Singleton<T>::inst = NULL; 00072 00073 #endif