libstdc++
|
00001 // -*- C++ -*- 00002 00003 // Copyright (C) 2005, 2006, 2009 Free Software Foundation, Inc. 00004 // 00005 // This file is part of the GNU ISO C++ Library. This library is free 00006 // software; you can redistribute it and/or modify it under the terms 00007 // of the GNU General Public License as published by the Free Software 00008 // Foundation; either version 3, or (at your option) any later 00009 // version. 00010 00011 // This library is distributed in the hope that it will be useful, but 00012 // WITHOUT ANY WARRANTY; without even the implied warranty of 00013 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 00014 // General Public License for more details. 00015 00016 // Under Section 7 of GPL version 3, you are granted additional 00017 // permissions described in the GCC Runtime Library Exception, version 00018 // 3.1, as published by the Free Software Foundation. 00019 00020 // You should have received a copy of the GNU General Public License and 00021 // a copy of the GCC Runtime Library Exception along with this program; 00022 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 00023 // <http://www.gnu.org/licenses/>. 00024 00025 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 00026 00027 // Permission to use, copy, modify, sell, and distribute this software 00028 // is hereby granted without fee, provided that the above copyright 00029 // notice appears in all copies, and that both that copyright notice 00030 // and this permission notice appear in supporting documentation. None 00031 // of the above authors, nor IBM Haifa Research Laboratories, make any 00032 // representation about the suitability of this software for any 00033 // purpose. It is provided "as is" without express or implied 00034 // warranty. 00035 00036 /** 00037 * @file cond_dealtor.hpp 00038 * Contains a conditional deallocator. 00039 */ 00040 00041 #ifndef PB_DS_COND_DEALTOR_HPP 00042 #define PB_DS_COND_DEALTOR_HPP 00043 00044 namespace __gnu_pbds 00045 { 00046 00047 namespace detail 00048 { 00049 00050 #define PB_DS_COND_DEALTOR_CLASS_T_DEC \ 00051 template<typename Entry, class Allocator> 00052 00053 #define PB_DS_COND_DEALTOR_CLASS_C_DEC \ 00054 cond_dealtor< \ 00055 Entry, \ 00056 Allocator> 00057 00058 template<typename Entry, class Allocator> 00059 class cond_dealtor 00060 { 00061 public: 00062 typedef 00063 typename Allocator::template rebind<Entry>::other 00064 entry_allocator; 00065 00066 typedef typename entry_allocator::pointer entry_pointer; 00067 00068 public: 00069 inline 00070 cond_dealtor(entry_pointer p_e); 00071 00072 inline 00073 ~cond_dealtor(); 00074 00075 inline void 00076 set_no_action(); 00077 00078 private: 00079 entry_pointer m_p_e; 00080 00081 bool m_no_action_destructor; 00082 00083 static entry_allocator s_alloc; 00084 }; 00085 00086 PB_DS_COND_DEALTOR_CLASS_T_DEC 00087 typename PB_DS_COND_DEALTOR_CLASS_C_DEC::entry_allocator 00088 PB_DS_COND_DEALTOR_CLASS_C_DEC::s_alloc; 00089 00090 PB_DS_COND_DEALTOR_CLASS_T_DEC 00091 inline 00092 PB_DS_COND_DEALTOR_CLASS_C_DEC:: 00093 cond_dealtor(entry_pointer p_e) : 00094 m_p_e(p_e), 00095 m_no_action_destructor(false) 00096 { } 00097 00098 PB_DS_COND_DEALTOR_CLASS_T_DEC 00099 inline void 00100 PB_DS_COND_DEALTOR_CLASS_C_DEC:: 00101 set_no_action() 00102 { 00103 m_no_action_destructor = true; 00104 } 00105 00106 PB_DS_COND_DEALTOR_CLASS_T_DEC 00107 inline 00108 PB_DS_COND_DEALTOR_CLASS_C_DEC:: 00109 ~cond_dealtor() 00110 { 00111 if (m_no_action_destructor) 00112 return; 00113 00114 s_alloc.deallocate(m_p_e, 1); 00115 } 00116 00117 #undef PB_DS_COND_DEALTOR_CLASS_T_DEC 00118 #undef PB_DS_COND_DEALTOR_CLASS_C_DEC 00119 00120 } // namespace detail 00121 00122 } // namespace __gnu_pbds 00123 00124 #endif // #ifndef PB_DS_COND_DEALTOR_HPP 00125