Subversion Repositories scarts

// -*- C++ -*-
 
// Copyright (C) 2005 Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library.  This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
// Free Software Foundation; either version 2, or (at your option)
// any later version.
 
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
 
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING.  If not, write to the Free
// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
// USA.
 
// As a special exception, you may use this file as part of a free software
// library without restriction.  Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License.  This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
 
// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
 
// Permission to use, copy, modify, sell, and distribute this software
// is hereby granted without fee, provided that the above copyright
// notice appears in all copies, and that both that copyright notice and
// this permission notice appear in supporting documentation. None of
// the above authors, nor IBM Haifa Research Laboratories, make any
// representation about the suitability of this software for any
// purpose. It is provided "as is" without express or implied warranty.
 
/**
 * @file cond_dtor.hpp
 * Contains a conditional destructor
 */
 
class cond_dtor
{
public:
  cond_dtor(pointer a_vec, iterator& r_last_it, size_type total_size) : m_a_vec(a_vec),
									m_r_last_it(r_last_it),
									m_max_size(total_size),
									m_no_action(false)
  { }
 
  ~cond_dtor()
  {
    if (m_no_action)
      return;
 
    iterator it = m_a_vec;
 
    while (it != m_r_last_it)
      {
	it->~value_type();
 
	++it;
      }
 
    if (m_max_size > 0)
      value_allocator().deallocate(
				   const_cast<typename value_allocator::pointer>(m_a_vec),
				   m_max_size);
  }
 
  inline void
  set_no_action()
  {
    m_no_action = true;
  }
 
protected:
  pointer m_a_vec;
 
  iterator& m_r_last_it;
 
  const size_type m_max_size;
 
  bool m_no_action;
};