cond_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
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/**
* @file detail/cond_dealtor.hpp
* Contains a conditional deallocator.
*/
#ifndef PB_DS_COND_DEALTOR_HPP
#define PB_DS_COND_DEALTOR_HPP
namespace __gnu_pbds
{
namespace detail
{
/// Conditional deallocate constructor argument.
template<typename Entry, typename _Alloc>
class cond_dealtor
{
typedef typename _Alloc::template rebind<Entry> __rebind_e;
public:
typedef typename __rebind_e::other entry_allocator;
typedef typename entry_allocator::pointer entry_pointer;
cond_dealtor(entry_pointer p_e)
: m_p_e(p_e), m_no_action_destructor(false) { }
~cond_dealtor()
{
if (m_no_action_destructor)
return;
s_alloc.deallocate(m_p_e, 1);
}
void
set_no_action()
{ m_no_action_destructor = true; }
private:
entry_pointer m_p_e;
bool m_no_action_destructor;
static entry_allocator s_alloc;
};
template<typename Entry, class _Alloc>
typename cond_dealtor<Entry, _Alloc>::entry_allocator
cond_dealtor<Entry, _Alloc>::s_alloc;
} // namespace detail
} // namespace __gnu_pbds
#endif // #ifndef PB_DS_COND_DEALTOR_HPP