sigx++ 2.0.1
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00001 #ifndef _SIGX_VOLATILE_TRAIT_H_ 00002 #define _SIGX_VOLATILE_TRAIT_H_ 00003 00004 /* 00005 * Copyright 2006 Klaus Triendl 00006 * 00007 * This library is free software; you can redistribute it and/or 00008 * modify it under the terms of the GNU Library General Public 00009 * License as published by the Free Software Foundation; either 00010 * version 2 of the License, or (at your option) any later version. 00011 * 00012 * This library is distributed in the hope that it will be useful, 00013 * but WITHOUT ANY WARRANTY; without even the implied warranty of 00014 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00015 * Library General Public License for more details. 00016 * 00017 * You should have received a copy of the GNU Library General Public 00018 * License along with this library; if not, write to the Free 00019 * Software Foundation, 51 Franklin Street, Fifth Floor, 00020 * Boston, MA 02110-1301, USA. 00021 */ 00022 00023 /* 00024 * Inspired by Andrei Alexandrescu's article "volatile - Multithreaded 00025 * Programmer's Best Friend": 00026 * http://www.ddj.com/dept/cpp/184403766 00027 */ 00028 00029 00030 namespace sigx 00031 { 00032 00039 template<typename T_type> 00040 struct volatile_trait 00041 { 00042 typedef volatile T_type add; 00043 typedef T_type remove; 00044 }; 00045 00048 template<typename T_type> 00049 struct volatile_trait<volatile T_type> 00050 { 00051 typedef volatile T_type add; 00052 typedef T_type remove; 00053 }; 00054 00095 template<typename T_type> 00096 struct volatile_trait<T_type&> 00097 { 00098 typedef volatile T_type& add; 00099 typedef T_type& remove; 00100 }; 00101 00104 template<typename T_type> 00105 struct volatile_trait<volatile T_type&> 00106 { 00107 typedef volatile T_type& add; 00108 typedef T_type& remove; 00109 }; 00110 00111 00112 00113 template<typename T, typename T_src> 00114 T volatile_cast(T_src& tsrc) 00115 { 00116 return const_cast<T>(tsrc); 00117 } 00118 00119 00120 00121 // @addtogroup threadsafety 00125 } // namespace sigx 00126 00127 00128 #endif // end file guard