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_dtor.hpp 44 * Contains a conditional destructor 45 */ 46 47template<typename Size_Type> 48class cond_dtor 49{ 50public: 51 cond_dtor(value_vector a_vec, iterator& r_last_it, Size_Type total_size) 52 : m_a_vec(a_vec), m_r_last_it(r_last_it), m_max_size(total_size), 53 m_no_action(false) 54 { } 55 56 ~cond_dtor() 57 { 58 if (m_no_action) 59 return; 60 iterator it = m_a_vec; 61 while (it != m_r_last_it) 62 { 63 it->~value_type(); 64 ++it; 65 } 66 67 if (m_max_size > 0) 68 value_allocator().deallocate(m_a_vec, m_max_size); 69 } 70 71 inline void 72 set_no_action() 73 { m_no_action = true; } 74 75protected: 76 value_vector m_a_vec; 77 iterator& m_r_last_it; 78 const Size_Type m_max_size; 79 bool m_no_action; 80}; 81