1 // -*- C++ -*- 2 3 // Copyright (C) 2005, 2006, 2009 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 3, 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 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 26 27 // Permission to use, copy, modify, sell, and distribute this software 28 // is hereby granted without fee, provided that the above copyright 29 // notice appears in all copies, and that both that copyright notice 30 // and this permission notice appear in supporting documentation. None 31 // of the above authors, nor IBM Haifa Research Laboratories, make any 32 // representation about the suitability of this software for any 33 // purpose. It is provided "as is" without express or implied 34 // warranty. 35 36 /** 37 * @file cond_dealtor.hpp 38 * Contains a conditional deallocator. 39 */ 40 41 #ifndef PB_DS_COND_DEALTOR_HPP 42 #define PB_DS_COND_DEALTOR_HPP 43 44 namespace __gnu_pbds 45 { 46 47 namespace detail 48 { 49 50 #define PB_DS_COND_DEALTOR_CLASS_T_DEC \ 51 template<typename Entry, class Allocator> 52 53 #define PB_DS_COND_DEALTOR_CLASS_C_DEC \ 54 cond_dealtor< \ 55 Entry, \ 56 Allocator> 57 58 template<typename Entry, class Allocator> 59 class cond_dealtor 60 { 61 public: 62 typedef 63 typename Allocator::template rebind<Entry>::other 64 entry_allocator; 65 66 typedef typename entry_allocator::pointer entry_pointer; 67 68 public: 69 inline 70 cond_dealtor(entry_pointer p_e); 71 72 inline 73 ~cond_dealtor(); 74 75 inline void 76 set_no_action(); 77 78 private: 79 entry_pointer m_p_e; 80 81 bool m_no_action_destructor; 82 83 static entry_allocator s_alloc; 84 }; 85 86 PB_DS_COND_DEALTOR_CLASS_T_DEC 87 typename PB_DS_COND_DEALTOR_CLASS_C_DEC::entry_allocator 88 PB_DS_COND_DEALTOR_CLASS_C_DEC::s_alloc; 89 90 PB_DS_COND_DEALTOR_CLASS_T_DEC 91 inline 92 PB_DS_COND_DEALTOR_CLASS_C_DEC:: 93 cond_dealtor(entry_pointer p_e) : 94 m_p_e(p_e), 95 m_no_action_destructor(false) 96 { } 97 98 PB_DS_COND_DEALTOR_CLASS_T_DEC 99 inline void 100 PB_DS_COND_DEALTOR_CLASS_C_DEC:: 101 set_no_action() 102 { 103 m_no_action_destructor = true; 104 } 105 106 PB_DS_COND_DEALTOR_CLASS_T_DEC 107 inline 108 PB_DS_COND_DEALTOR_CLASS_C_DEC:: 109 ~cond_dealtor() 110 { 111 if (m_no_action_destructor) 112 return; 113 114 s_alloc.deallocate(m_p_e, 1); 115 } 116 117 #undef PB_DS_COND_DEALTOR_CLASS_T_DEC 118 #undef PB_DS_COND_DEALTOR_CLASS_C_DEC 119 120 } // namespace detail 121 122 } // namespace __gnu_pbds 123 124 #endif // #ifndef PB_DS_COND_DEALTOR_HPP 125 126
