SingletonT.hh
00001 /* 00002 * Copyright 2011 Nate Koenig & Andrew Howard 00003 * 00004 * Licensed under the Apache License, Version 2.0 (the "License"); 00005 * you may not use this file except in compliance with the License. 00006 * You may obtain a copy of the License at 00007 * 00008 * http://www.apache.org/licenses/LICENSE-2.0 00009 * 00010 * Unless required by applicable law or agreed to in writing, software 00011 * distributed under the License is distributed on an "AS IS" BASIS, 00012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 00013 * See the License for the specific language governing permissions and 00014 * limitations under the License. 00015 * 00016 */ 00017 /* Desc: Singleton base class 00018 * Author: Nate Koenig 00019 * Date: 2 Sept 2007 00020 */ 00021 00022 #ifndef SINGLETONT_HH 00023 #define SINGLETONT_HH 00024 00027 00029 template <class T> 00030 class SingletonT 00031 { 00033 public: static T *Instance() 00034 { 00035 return &GetInstance(); 00036 } 00037 00039 protected: SingletonT() {} 00040 00042 protected: virtual ~SingletonT() {} 00043 00044 private: static T &GetInstance() 00045 { 00046 static T t; 00047 return static_cast<T &>(t); 00048 } 00049 00050 private: static T &myself; 00051 }; 00052 00053 template <class T> 00054 T &SingletonT<T>::myself = SingletonT<T>::GetInstance(); 00056 00057 #endif
