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_dtor.hpp
38 * Contains a conditional destructor
39 */
40
41template<typename Size_Type>
42class cond_dtor
43{
44public:
45  cond_dtor(value_vector a_vec, iterator& r_last_it, Size_Type total_size)
46  : m_a_vec(a_vec), m_r_last_it(r_last_it), m_max_size(total_size),
47    m_no_action(false)
48  { }
49
50  ~cond_dtor()
51  {
52    if (m_no_action)
53      return;
54    iterator it = m_a_vec;
55    while (it != m_r_last_it)
56      {
57	it->~value_type();
58	++it;
59      }
60
61    if (m_max_size > 0)
62      value_allocator().deallocate(m_a_vec, m_max_size);
63  }
64
65  inline void
66  set_no_action()
67  { m_no_action = true; }
68
69protected:
70  value_vector m_a_vec;
71  iterator& m_r_last_it;
72  const Size_Type m_max_size;
73  bool m_no_action;
74};
75