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4569a895 AT |
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 resize_fn_imps.hpp | |
44 | * Contains implementations of cc_ht_map_'s resize related functions. | |
45 | */ | |
46 | ||
47 | PB_DS_CLASS_T_DEC | |
48 | inline bool | |
49 | PB_DS_CLASS_C_DEC:: | |
50 | do_resize_if_needed() | |
51 | { | |
52 | if (!resize_base::is_resize_needed()) | |
1b24692f BK |
53 | return false; |
54 | resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e)); | |
55 | return true; | |
4569a895 AT |
56 | } |
57 | ||
58 | PB_DS_CLASS_T_DEC | |
59 | void | |
60 | PB_DS_CLASS_C_DEC:: | |
1ab79481 BK |
61 | do_resize(size_type len) |
62 | { resize_imp(resize_base::get_nearest_larger_size(len)); } | |
4569a895 AT |
63 | |
64 | PB_DS_CLASS_T_DEC | |
65 | inline void | |
66 | PB_DS_CLASS_C_DEC:: | |
67 | do_resize_if_needed_no_throw() | |
68 | { | |
69 | if (!resize_base::is_resize_needed()) | |
70 | return; | |
71 | ||
72 | try | |
73 | { | |
1b24692f | 74 | resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e)); |
4569a895 AT |
75 | } |
76 | catch(...) | |
77 | { } | |
78 | ||
47bea7b8 | 79 | _GLIBCXX_DEBUG_ONLY(assert_valid();) |
1b24692f | 80 | } |
4569a895 AT |
81 | |
82 | PB_DS_CLASS_T_DEC | |
83 | void | |
84 | PB_DS_CLASS_C_DEC:: | |
85 | resize_imp(size_type new_size) | |
86 | { | |
47bea7b8 | 87 | _GLIBCXX_DEBUG_ONLY(assert_valid();) |
1b24692f BK |
88 | if (new_size == m_num_e) |
89 | return; | |
4569a895 | 90 | |
3441f106 | 91 | const size_type old_size = m_num_e; |
4569a895 AT |
92 | entry_pointer_array a_p_entries_resized; |
93 | ||
94 | // Following line might throw an exception. | |
4569a895 AT |
95 | ranged_hash_fn_base::notify_resized(new_size); |
96 | ||
97 | try | |
98 | { | |
99 | // Following line might throw an exception. | |
4569a895 | 100 | a_p_entries_resized = s_entry_pointer_allocator.allocate(new_size); |
3441f106 | 101 | m_num_e = new_size; |
4569a895 AT |
102 | } |
103 | catch(...) | |
104 | { | |
105 | ranged_hash_fn_base::notify_resized(old_size); | |
8fafc2d3 | 106 | __throw_exception_again; |
4569a895 AT |
107 | } |
108 | ||
109 | // At this point no exceptions can be thrown. | |
4569a895 | 110 | resize_imp_no_exceptions(new_size, a_p_entries_resized, old_size); |
4569a895 | 111 | Resize_Policy::notify_resized(new_size); |
47bea7b8 | 112 | _GLIBCXX_DEBUG_ONLY(assert_valid();) |
1b24692f | 113 | } |
4569a895 AT |
114 | |
115 | PB_DS_CLASS_T_DEC | |
116 | void | |
117 | PB_DS_CLASS_C_DEC:: | |
118 | resize_imp_no_exceptions(size_type new_size, entry_pointer_array a_p_entries_resized, size_type old_size) | |
119 | { | |
1b24692f BK |
120 | std::fill(a_p_entries_resized, a_p_entries_resized + m_num_e, |
121 | entry_pointer(NULL)); | |
4569a895 AT |
122 | |
123 | for (size_type pos = 0; pos < old_size; ++pos) | |
124 | { | |
3441f106 | 125 | entry_pointer p_e = m_entries[pos]; |
4569a895 | 126 | while (p_e != NULL) |
1b24692f | 127 | p_e = resize_imp_no_exceptions_reassign_pointer(p_e, a_p_entries_resized, traits_base::m_store_extra_indicator); |
4569a895 AT |
128 | } |
129 | ||
3441f106 | 130 | m_num_e = new_size; |
47bea7b8 | 131 | _GLIBCXX_DEBUG_ONLY(assert_entry_pointer_array_valid(a_p_entries_resized);) |
1b24692f | 132 | s_entry_pointer_allocator.deallocate(m_entries, old_size); |
3441f106 | 133 | m_entries = a_p_entries_resized; |
47bea7b8 | 134 | _GLIBCXX_DEBUG_ONLY(assert_valid();) |
1b24692f | 135 | } |
4569a895 AT |
136 | |
137 | #include <ext/pb_ds/detail/cc_hash_table_map_/resize_no_store_hash_fn_imps.hpp> | |
138 | #include <ext/pb_ds/detail/cc_hash_table_map_/resize_store_hash_fn_imps.hpp> | |
139 |