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00001 // Copyright (C) 2001-2005 Open Source Telecom Corporation. 00002 // Copyright (C) 2006-2014 David Sugar, Tycho Softworks. 00003 // Copyright (C) 2015 Cherokees of Idaho. 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 Lesser General Public License 00016 // along with this program. If not, see <http://www.gnu.org/licenses/>. 00017 // 00018 // As a special exception to the GNU General Public License, permission is 00019 // granted for additional uses of the text contained in its release 00020 // of Common C++. 00021 // 00022 // The exception is that, if you link the Common C++ library with other 00023 // files to produce an executable, this does not by itself cause the 00024 // resulting executable to be covered by the GNU General Public License. 00025 // Your use of that executable is in no way restricted on account of 00026 // linking the Common C++ library code into it. 00027 // 00028 // This exception does not however invalidate any other reasons why 00029 // the executable file might be covered by the GNU General Public License. 00030 // 00031 // This exception applies only to the code released under the 00032 // name Common C++. If you copy code from other releases into a copy of 00033 // Common C++, as the General Public License permits, the exception does 00034 // not apply to the code that you add in this way. To avoid misleading 00035 // anyone as to the status of such modified files, you must delete 00036 // this exception notice from them. 00037 // 00038 // If you write modifications of your own for Common C++, it is your choice 00039 // whether to permit this exception to apply to your modifications. 00040 // If you do not wish that, delete this exception notice. 00041 00047 #ifndef COMMONCPP_POINTER_H_ 00048 #define COMMONCPP_POINTER_H_ 00049 00050 #ifndef COMMONCPP_CONFIG_H_ 00051 #include <commoncpp/config.h> 00052 #endif 00053 00054 namespace ost { 00055 00062 template <class T> 00063 class Pointer 00064 { 00065 protected: 00066 unsigned *ptrCount; 00067 T *ptrObject; 00068 00069 inline void ptrDetach(void) { 00070 if(ptrCount && --(*ptrCount)==0) { 00071 delete ptrObject; 00072 delete ptrCount; 00073 } 00074 ptrObject = NULL; 00075 ptrCount = NULL; 00076 } 00077 00078 public: 00079 inline explicit Pointer(T* ptr = NULL) : ptrObject(ptr) { 00080 ptrCount = new unsigned; 00081 *ptrCount = 1; 00082 } 00083 00084 inline Pointer(const Pointer<T> &ref) { 00085 ptrObject = ref.ptrObject; 00086 ptrCount = ref.ptrCount; 00087 ++(*ptrCount); 00088 } 00089 00090 inline virtual ~Pointer() 00091 {ptrDetach();} 00092 00093 00094 inline Pointer& operator=(const Pointer<T> &ref) { 00095 if(this != &ref) { 00096 ptrDetach(); 00097 ptrObject = ref.ptrObject; 00098 ptrCount = ref.ptrCount; 00099 ++(*ptrCount); 00100 } 00101 return *this; 00102 } 00103 00104 inline T& operator*() const 00105 {return *ptrObject;} 00106 00107 inline T* getObject() const 00108 {return ptrObject;} 00109 00110 inline T* operator->() const 00111 {return ptrObject;} 00112 00113 inline bool operator!() const 00114 {return (*ptrCount == 1);} 00115 00116 inline int operator++() const 00117 {return ++(*ptrCount);} 00118 00119 inline int operator--() const { 00120 if(*ptrCount == 1) { 00121 delete this; 00122 return 0; 00123 } 00124 return --(*ptrCount); 00125 } 00126 }; 00127 00128 } // namespace ost 00129 00130 #endif