1// -*- C++ -*- 2 3// Copyright (C) 2005, 2006, 2009, 2011 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 cc_hash_table_map_/cond_key_dtor_entry_dealtor.hpp 38 * Contains a conditional key destructor, used for exception handling. 39 */ 40 41namespace __gnu_pbds 42{ 43 namespace detail 44 { 45 /// Conditional dey destructor, cc_hash. 46 template<typename HT_Map> 47 class cond_dealtor 48 { 49 public: 50 typedef typename HT_Map::entry entry; 51 typedef typename HT_Map::entry_allocator entry_allocator; 52 typedef typename HT_Map::key_type key_type; 53 54 cond_dealtor(entry_allocator* p_a, entry* p_e) 55 : m_p_a(p_a), m_p_e(p_e), m_key_destruct(false), 56 m_no_action_destructor(false) 57 { } 58 59 inline 60 ~cond_dealtor(); 61 62 void 63 set_key_destruct() 64 { m_key_destruct = true; } 65 66 void 67 set_no_action_destructor() 68 { m_no_action_destructor = true; } 69 70 protected: 71 entry_allocator* const m_p_a; 72 entry* const m_p_e; 73 74 bool m_key_destruct; 75 bool m_no_action_destructor; 76 }; 77 78 template<typename HT_Map> 79 inline 80 cond_dealtor<HT_Map>:: 81 ~cond_dealtor() 82 { 83 if (m_no_action_destructor) 84 return; 85 if (m_key_destruct) 86 m_p_e->m_value.first.~key_type(); 87 m_p_a->deallocate(m_p_e, 1); 88 } 89 } // namespace detail 90} // namespace __gnu_pbds 91