cond_key_dtor_entry_dealtor.hpp
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// -*- C++ -*-
// Copyright (C) 2005-2013 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 3, 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.
// Under Section 7 of GPL version 3, you are granted additional
// permissions described in the GCC Runtime Library Exception, version
// 3.1, as published by the Free Software Foundation.
// You should have received a copy of the GNU General Public License and
// a copy of the GCC Runtime Library Exception along with this program;
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
// <http://www.gnu.org/licenses/>.
// 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
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/**
* @file cc_hash_table_map_/cond_key_dtor_entry_dealtor.hpp
* Contains a conditional key destructor, used for exception handling.
*/
namespace __gnu_pbds
{
namespace detail
{
/// Conditional dey destructor, cc_hash.
template<typename HT_Map>
class cond_dealtor
{
public:
typedef typename HT_Map::entry entry;
typedef typename HT_Map::entry_allocator entry_allocator;
typedef typename HT_Map::key_type key_type;
cond_dealtor(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)
{ }
inline
~cond_dealtor();
void
set_key_destruct()
{ m_key_destruct = true; }
void
set_no_action_destructor()
{ m_no_action_destructor = true; }
protected:
entry_allocator* const m_p_a;
entry* const m_p_e;
bool m_key_destruct;
bool m_no_action_destructor;
};
template<typename HT_Map>
inline
cond_dealtor<HT_Map>::
~cond_dealtor()
{
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);
}
} // namespace detail
} // namespace __gnu_pbds