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_key_dtor_entry_dealtor.hpp 44 * Contains a conditional key destructor, used for exception handling. 45 */ 46 47 namespace pb_ds 48 { 49 namespace detail 50 { 51 52 #define PB_DS_CLASS_T_DEC template<typename HT_Map> 53 #define PB_DS_CLASS_C_DEC PB_DS_CKDED_CLASS_NAME<HT_Map> 54 55 /** 56 * A conditional key destructor, used for exception handling. 57 **/ 58 template<typename HT_Map> 59 class PB_DS_CKDED_CLASS_NAME 60 { 61 public: 62 typedef typename HT_Map::entry entry; 63 typedef typename HT_Map::entry_allocator entry_allocator; 64 typedef typename HT_Map::key_type key_type; 65 66 inline 67 PB_DS_CKDED_CLASS_NAME(entry_allocator* p_a, entry* p_e); 68 69 inline 70 ~PB_DS_CKDED_CLASS_NAME(); 71 72 inline void 73 set_key_destruct(); 74 75 inline void 76 set_no_action_destructor(); 77 78 protected: 79 entry_allocator* const m_p_a; 80 entry* const m_p_e; 81 82 bool m_key_destruct; 83 bool m_no_action_destructor; 84 }; 85 86 PB_DS_CLASS_T_DEC 87 inline 88 PB_DS_CLASS_C_DEC:: PB_DS_CKDED_CLASS_NAME(entry_allocator * p_a,entry * p_e)89 PB_DS_CKDED_CLASS_NAME(entry_allocator* p_a, entry* p_e) 90 : m_p_a(p_a), m_p_e(p_e), m_key_destruct(false), 91 m_no_action_destructor(false) 92 { } 93 94 PB_DS_CLASS_T_DEC 95 inline void 96 PB_DS_CLASS_C_DEC:: set_key_destruct()97 set_key_destruct() 98 { m_key_destruct = true; } 99 100 PB_DS_CLASS_T_DEC 101 inline void 102 PB_DS_CLASS_C_DEC:: set_no_action_destructor()103 set_no_action_destructor() 104 { m_no_action_destructor = true; } 105 106 PB_DS_CLASS_T_DEC 107 inline 108 PB_DS_CLASS_C_DEC:: ~PB_DS_CKDED_CLASS_NAME()109 ~PB_DS_CKDED_CLASS_NAME() 110 { 111 if (m_no_action_destructor) 112 return; 113 if (m_key_destruct) 114 m_p_e->m_value.first.~key_type(); 115 m_p_a->deallocate(m_p_e, 1); 116 } 117 118 #undef PB_DS_CLASS_T_DEC 119 #undef PB_DS_CLASS_C_DEC 120 121 } // namespace detail 122 } // namespace pb_ds 123 124