1 // -*- C++ -*- 2 3 // Copyright (C) 2005, 2006 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the terms 7 // of the GNU General Public License as published by the Free Software 8 // Foundation; either version 2, or (at your option) any later 9 // version. 10 11 // This library is distributed in the hope that it will be useful, but 12 // WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 // General Public License for more details. 15 16 // You should have received a copy of the GNU General Public License 17 // along with this library; see the file COPYING. If not, write to 18 // the Free Software Foundation, 59 Temple Place - Suite 330, Boston, 19 // MA 02111-1307, USA. 20 21 // As a special exception, you may use this file as part of a free 22 // software library without restriction. Specifically, if other files 23 // instantiate templates or use macros or inline functions from this 24 // file, or you compile this file and link it with other files to 25 // produce an executable, this file does not by itself cause the 26 // resulting executable to be covered by the GNU General Public 27 // License. This exception does not however invalidate any other 28 // reasons why the executable file might be covered by the GNU General 29 // Public License. 30 31 // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. 32 33 // Permission to use, copy, modify, sell, and distribute this software 34 // is hereby granted without fee, provided that the above copyright 35 // notice appears in all copies, and that both that copyright notice 36 // and this permission notice appear in supporting documentation. None 37 // of the above authors, nor IBM Haifa Research Laboratories, make any 38 // representation about the suitability of this software for any 39 // purpose. It is provided "as is" without express or implied 40 // warranty. 41 42 /** 43 * @file split_join_branch_bag.hpp 44 * Contains an implementation class for pat_trie_. 45 */ 46 47 class split_join_branch_bag 48 { 49 private: 50 typedef 51 std::list< 52 internal_node_pointer, 53 typename Allocator::template rebind< 54 internal_node_pointer>::other> 55 bag_t; 56 57 public: 58 59 void add_branch()60 add_branch() 61 { 62 internal_node_pointer p_nd = s_internal_node_allocator.allocate(1); 63 try 64 { 65 m_bag.push_back(p_nd); 66 } 67 catch(...) 68 { 69 s_internal_node_allocator.deallocate(p_nd, 1); 70 __throw_exception_again; 71 } 72 } 73 74 internal_node_pointer get_branch()75 get_branch() 76 { 77 _GLIBCXX_DEBUG_ASSERT(!m_bag.empty()); 78 internal_node_pointer p_nd =* m_bag.begin(); 79 m_bag.pop_front(); 80 return p_nd; 81 } 82 ~split_join_branch_bag()83 ~split_join_branch_bag() 84 { 85 while (!m_bag.empty()) 86 { 87 internal_node_pointer p_nd =* m_bag.begin(); 88 s_internal_node_allocator.deallocate(p_nd, 1); 89 m_bag.pop_front(); 90 } 91 } 92 93 inline bool empty() const94 empty() const 95 { return m_bag.empty(); } 96 97 private: 98 bag_t m_bag; 99 }; 100