1 // -*- C++ -*- 2 3 // Copyright (C) 2005, 2006 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the terms 7 // of the GNU General Public License as published by the Free Software 8 // Foundation; either version 2, or (at your option) any later 9 // version. 10 11 // This library is distributed in the hope that it will be useful, but 12 // WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 // General Public License for more details. 15 16 // You should have received a copy of the GNU General Public License 17 // along with this library; see the file COPYING. If not, write to 18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 19 // MA 02111-1307, USA. 20 21 // As a special exception, you may use this file as part of a free 22 // software library without restriction. Specifically, if other files 23 // instantiate templates or use macros or inline functions from this 24 // file, or you compile this file and link it with other files to 25 // produce an executable, this file does not by itself cause the 26 // resulting executable to be covered by the GNU General Public 27 // License. This exception does not however invalidate any other 28 // reasons why the executable file might be covered by the GNU General 29 // Public License. 30 31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 32 33 // Permission to use, copy, modify, sell, and distribute this software 34 // is hereby granted without fee, provided that the above copyright 35 // notice appears in all copies, and that both that copyright notice 36 // and this permission notice appear in supporting documentation. None 37 // of the above authors, nor IBM Haifa Research Laboratories, make any 38 // representation about the suitability of this software for any 39 // purpose. It is provided "as is" without express or implied 40 // warranty. 41 42 /** 43 * @file cond_dealtor.hpp 44 * Contains a conditional deallocator. 45 */ 46 47 #ifndef PB_DS_COND_DEALTOR_HPP 48 #define PB_DS_COND_DEALTOR_HPP 49 50 namespace pb_ds 51 { 52 53 namespace detail 54 { 55 56 #define PB_DS_COND_DEALTOR_CLASS_T_DEC \ 57 template<typename Entry, class Allocator> 58 59 #define PB_DS_COND_DEALTOR_CLASS_C_DEC \ 60 cond_dealtor< \ 61 Entry, \ 62 Allocator> 63 64 template<typename Entry, class Allocator> 65 class cond_dealtor 66 { 67 public: 68 typedef 69 typename Allocator::template rebind<Entry>::other 70 entry_allocator; 71 72 typedef typename entry_allocator::pointer entry_pointer; 73 74 public: 75 inline 76 cond_dealtor(entry_pointer p_e); 77 78 inline 79 ~cond_dealtor(); 80 81 inline void 82 set_no_action(); 83 84 private: 85 entry_pointer m_p_e; 86 87 bool m_no_action_destructor; 88 89 static entry_allocator s_alloc; 90 }; 91 92 PB_DS_COND_DEALTOR_CLASS_T_DEC 93 typename PB_DS_COND_DEALTOR_CLASS_C_DEC::entry_allocator 94 PB_DS_COND_DEALTOR_CLASS_C_DEC::s_alloc; 95 96 PB_DS_COND_DEALTOR_CLASS_T_DEC 97 inline 98 PB_DS_COND_DEALTOR_CLASS_C_DEC:: cond_dealtor(entry_pointer p_e)99 cond_dealtor(entry_pointer p_e) : 100 m_p_e(p_e), 101 m_no_action_destructor(false) 102 { } 103 104 PB_DS_COND_DEALTOR_CLASS_T_DEC 105 inline void 106 PB_DS_COND_DEALTOR_CLASS_C_DEC:: set_no_action()107 set_no_action() 108 { 109 m_no_action_destructor = true; 110 } 111 112 PB_DS_COND_DEALTOR_CLASS_T_DEC 113 inline 114 PB_DS_COND_DEALTOR_CLASS_C_DEC:: ~cond_dealtor()115 ~cond_dealtor() 116 { 117 if (m_no_action_destructor) 118 return; 119 120 s_alloc.deallocate(m_p_e, 1); 121 } 122 123 #undef PB_DS_COND_DEALTOR_CLASS_T_DEC 124 #undef PB_DS_COND_DEALTOR_CLASS_C_DEC 125 126 } // namespace detail 127 128 } // namespace pb_ds 129 130 #endif // #ifndef PB_DS_COND_DEALTOR_HPP 131 132