gomp-20050608-branch/libstdc++-v3/include/ext/pb_assoc/detail/ov_tree_map_/cond_dtor.hpp

   1 // -*- C++ -*-
   2
   3 // Copyright (C) 2005 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
   7 // terms of the GNU General Public License as published by the
   8 // Free Software Foundation; either version 2, or (at your option)
   9 // any later version.
  10
  11 // This library is distributed in the hope that it will be useful,
  12 // but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14 // GNU General Public License for more details.
  15
  16 // You should have received a copy of the GNU General Public License along
  17 // with this library; see the file COPYING.  If not, write to the Free
  18 // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
  19 // USA.
  20
  21 // As a special exception, you may use this file as part of a free software
  22 // library without restriction.  Specifically, if other files instantiate
  23 // templates or use macros or inline functions from this file, or you compile
  24 // this file and link it with other files to produce an executable, this
  25 // file does not by itself cause the resulting executable to be covered by
  26 // the GNU General Public License.  This exception does not however
  27 // invalidate any other reasons why the executable file might be covered by
  28 // the GNU General Public License.
  29
  30 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
  31
  32 // Permission to use, copy, modify, sell, and distribute this software
  33 // is hereby granted without fee, provided that the above copyright
  34 // notice appears in all copies, and that both that copyright notice and
  35 // this permission notice appear in supporting documentation. None of
  36 // the above authors, nor IBM Haifa Research Laboratories, make any
  37 // representation about the suitability of this software for any
  38 // purpose. It is provided "as is" without express or implied warranty.
  39
  40 /**
  41  * @file cond_dtor.hpp
  42  * Contains a conditional destructor
  43  */
  44
  45 class cond_dtor
  46 {
  47 public:
  48   cond_dtor(pointer a_vec, iterator& r_last_it, size_type total_size) : m_a_vec(a_vec),
  49                                                                         m_r_last_it(r_last_it),
  50                                                                         m_max_size(total_size),
  51                                                                         m_no_action(false)
  52   { }
  53
  54   ~cond_dtor()
  55   {
  56     if (m_no_action)
  57       return;
  58
  59     iterator it = m_a_vec;
  60
  61     while (it != m_r_last_it)
  62       {
  63         it->~value_type();
  64
  65         ++it;
  66       }
  67
  68     if (m_max_size > 0)
  69       value_allocator().deallocate(
  70                                    const_cast<typename value_allocator::pointer>(m_a_vec),
  71                                    m_max_size);
  72   }
  73
  74   inline void
  75   set_no_action()
  76   {
  77     m_no_action = true;
  78   }
  79
  80 protected:
  81   pointer m_a_vec;
  82
  83   iterator& m_r_last_it;
  84
  85   const size_type m_max_size;
  86
  87   bool m_no_action;
  88 };