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// -*- 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_dealtor.hpp

 * Contains a conditional deallocator.

 */

#ifndef COND_DEALTOR_HPP

#define COND_DEALTOR_HPP

namespace pb_assoc

{

  namespace detail

  {

#define PB_ASSOC_COND_DEALTOR_CLASS_T_DEC \

        template<class Entry, class Allocator>

#define PB_ASSOC_COND_DEALTOR_CLASS_C_DEC \

        cond_dealtor< \

                Entry, \

                Allocator>

    template<class Entry, class Allocator>

    class cond_dealtor

    {

    public:

      typedef

      typename Allocator::template rebind<Entry>::other

      entry_allocator;

      typedef typename entry_allocator::pointer entry_pointer;

    public:

      inline

      cond_dealtor(entry_pointer p_e);

      inline

      ~cond_dealtor();

      inline void

      set_no_action();

    private:

      entry_pointer m_p_e;

      bool m_no_action_destructor;

      static entry_allocator s_alloc;

    };

    PB_ASSOC_COND_DEALTOR_CLASS_T_DEC

    typename PB_ASSOC_COND_DEALTOR_CLASS_C_DEC::entry_allocator

    PB_ASSOC_COND_DEALTOR_CLASS_C_DEC::s_alloc;

    PB_ASSOC_COND_DEALTOR_CLASS_T_DEC

    inline

    PB_ASSOC_COND_DEALTOR_CLASS_C_DEC::

    cond_dealtor(entry_pointer p_e) :

      m_p_e(p_e),

      m_no_action_destructor(false)

    { }

    PB_ASSOC_COND_DEALTOR_CLASS_T_DEC

    inline void

    PB_ASSOC_COND_DEALTOR_CLASS_C_DEC::

    set_no_action()

    {

      m_no_action_destructor = true;

    }

    PB_ASSOC_COND_DEALTOR_CLASS_T_DEC

    inline

    PB_ASSOC_COND_DEALTOR_CLASS_C_DEC::

    ~cond_dealtor()

    {

      if (m_no_action_destructor)

        return;

      s_alloc.deallocate(m_p_e, 1);

    }

#undef PB_ASSOC_COND_DEALTOR_CLASS_T_DEC

#undef PB_ASSOC_COND_DEALTOR_CLASS_C_DEC

  } // namespace detail

} // namespace pb_assoc

#endif // #ifndef COND_DEALTOR_HPP