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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 | |
60 | add_branch() | |
61 | { | |
62 | internal_node_pointer p_nd = s_internal_node_allocator.allocate(1); | |
63 | ||
64 | try | |
65 | { | |
66 | m_bag.push_back(p_nd); | |
67 | } | |
68 | catch(...) | |
69 | { | |
70 | s_internal_node_allocator.deallocate(p_nd, 1); | |
71 | ||
72 | throw; | |
73 | } | |
74 | } | |
75 | ||
76 | internal_node_pointer | |
77 | get_branch() | |
78 | { | |
47bea7b8 | 79 | _GLIBCXX_DEBUG_ASSERT(!m_bag.empty()); |
4569a895 AT |
80 | |
81 | internal_node_pointer p_nd =* m_bag.begin(); | |
82 | ||
83 | m_bag.pop_front(); | |
84 | ||
85 | return (p_nd); | |
86 | } | |
87 | ||
88 | ~split_join_branch_bag() | |
89 | { | |
90 | while (!m_bag.empty()) | |
91 | { | |
92 | internal_node_pointer p_nd =* m_bag.begin(); | |
93 | ||
94 | s_internal_node_allocator.deallocate(p_nd, 1); | |
95 | ||
96 | m_bag.pop_front(); | |
97 | } | |
98 | } | |
99 | ||
100 | inline bool | |
101 | empty() const | |
102 | { | |
103 | return (m_bag.empty()); | |
104 | } | |
105 | ||
106 | private: | |
107 | bag_t m_bag; | |
108 | }; |