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// -*- C++ -*-
// Copyright (C) 2005, 2006, 2007, 2008, 2009 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
// 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 split_join_branch_bag.hpp
* Contains an implementation class for pat_trie_.
*/
class split_join_branch_bag
{
private:
typedef
std::list<
internal_node_pointer,
typename Allocator::template rebind<
internal_node_pointer>::other>
bag_t;
public:
void
add_branch()
{
internal_node_pointer p_nd = s_internal_node_allocator.allocate(1);
__try
{
m_bag.push_back(p_nd);
}
__catch(...)
{
s_internal_node_allocator.deallocate(p_nd, 1);
__throw_exception_again;
}
}
internal_node_pointer
get_branch()
{
_GLIBCXX_DEBUG_ASSERT(!m_bag.empty());
internal_node_pointer p_nd =* m_bag.begin();
m_bag.pop_front();
return p_nd;
}
~split_join_branch_bag()
{
while (!m_bag.empty())
{
internal_node_pointer p_nd =* m_bag.begin();
s_internal_node_allocator.deallocate(p_nd, 1);
m_bag.pop_front();
}
}
inline bool
empty() const
{ return m_bag.empty(); }
private:
bag_t m_bag;
};
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