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// -*- C++ -*-
// Copyright (C) 2005, 2006 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, 59 Temple Place - Suite 330, Boston,
// MA 02111-1307, 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_key_dtor_entry_dealtor.hpp
* Contains a conditional key destructor, used for exception handling.
*/
namespace __gnu_pbds
{
namespace detail
{
#define PB_DS_CLASS_T_DEC template<typename HT_Map>
#define PB_DS_CLASS_C_DEC PB_DS_CKDED_CLASS_NAME<HT_Map>
/**
* A conditional key destructor, used for exception handling.
**/
template<typename HT_Map>
class PB_DS_CKDED_CLASS_NAME
{
public:
typedef typename HT_Map::entry entry;
typedef typename HT_Map::entry_allocator entry_allocator;
typedef typename HT_Map::key_type key_type;
inline
PB_DS_CKDED_CLASS_NAME(entry_allocator* p_a, entry* p_e);
inline
~PB_DS_CKDED_CLASS_NAME();
inline void
set_key_destruct();
inline void
set_no_action_destructor();
protected:
entry_allocator* const m_p_a;
entry* const m_p_e;
bool m_key_destruct;
bool m_no_action_destructor;
};
PB_DS_CLASS_T_DEC
inline
PB_DS_CLASS_C_DEC::
PB_DS_CKDED_CLASS_NAME(entry_allocator* p_a, entry* p_e)
: m_p_a(p_a), m_p_e(p_e), m_key_destruct(false),
m_no_action_destructor(false)
{ }
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
set_key_destruct()
{ m_key_destruct = true; }
PB_DS_CLASS_T_DEC
inline void
PB_DS_CLASS_C_DEC::
set_no_action_destructor()
{ m_no_action_destructor = true; }
PB_DS_CLASS_T_DEC
inline
PB_DS_CLASS_C_DEC::
~PB_DS_CKDED_CLASS_NAME()
{
if (m_no_action_destructor)
return;
if (m_key_destruct)
m_p_e->m_value.first.~key_type();
m_p_a->deallocate(m_p_e, 1);
}
#undef PB_DS_CLASS_T_DEC
#undef PB_DS_CLASS_C_DEC
} // namespace detail
} // namespace __gnu_pbds
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