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_key_dtor_entry_dealtor.hpp 38 * Contains a conditional key destructor, used for exception handling. 39 */ 40 41 namespace __gnu_pbds 42 { 43 namespace detail 44 { 45 46 #define PB_DS_CLASS_T_DEC template<typename HT_Map> 47 #define PB_DS_CLASS_C_DEC PB_DS_CKDED_CLASS_NAME<HT_Map> 48 49 /** 50 * A conditional key destructor, used for exception handling. 51 **/ 52 template<typename HT_Map> 53 class PB_DS_CKDED_CLASS_NAME 54 { 55 public: 56 typedef typename HT_Map::entry entry; 57 typedef typename HT_Map::entry_allocator entry_allocator; 58 typedef typename HT_Map::key_type key_type; 59 60 inline 61 PB_DS_CKDED_CLASS_NAME(entry_allocator* p_a, entry* p_e); 62 63 inline 64 ~PB_DS_CKDED_CLASS_NAME(); 65 66 inline void 67 set_key_destruct(); 68 69 inline void 70 set_no_action_destructor(); 71 72 protected: 73 entry_allocator* const m_p_a; 74 entry* const m_p_e; 75 76 bool m_key_destruct; 77 bool m_no_action_destructor; 78 }; 79 80 PB_DS_CLASS_T_DEC 81 inline 82 PB_DS_CLASS_C_DEC:: 83 PB_DS_CKDED_CLASS_NAME(entry_allocator* p_a, entry* p_e) 84 : m_p_a(p_a), m_p_e(p_e), m_key_destruct(false), 85 m_no_action_destructor(false) 86 { } 87 88 PB_DS_CLASS_T_DEC 89 inline void 90 PB_DS_CLASS_C_DEC:: 91 set_key_destruct() 92 { m_key_destruct = true; } 93 94 PB_DS_CLASS_T_DEC 95 inline void 96 PB_DS_CLASS_C_DEC:: 97 set_no_action_destructor() 98 { m_no_action_destructor = true; } 99 100 PB_DS_CLASS_T_DEC 101 inline 102 PB_DS_CLASS_C_DEC:: 103 ~PB_DS_CKDED_CLASS_NAME() 104 { 105 if (m_no_action_destructor) 106 return; 107 if (m_key_destruct) 108 m_p_e->m_value.first.~key_type(); 109 m_p_a->deallocate(m_p_e, 1); 110 } 111 112 #undef PB_DS_CLASS_T_DEC 113 #undef PB_DS_CLASS_C_DEC 114 115 } // namespace detail 116 } // namespace __gnu_pbds 117 118
