libstdc++: resize_fn_imps.hpp Source File

libstdc++

cc_hash_table_map_/resize_fn_imps.hpp
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1// -*- C++ -*-
2
3// Copyright (C) 2005-2026 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 3, 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// Under Section 7 of GPL version 3, you are granted additional
17// permissions described in the GCC Runtime Library Exception, version
18// 3.1, as published by the Free Software Foundation.
19
20// You should have received a copy of the GNU General Public License and
21// a copy of the GCC Runtime Library Exception along with this program;
22// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
23// <http://www.gnu.org/licenses/>.
24
25// Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL.
26
27// Permission to use, copy, modify, sell, and distribute this software
28// is hereby granted without fee, provided that the above copyright
29// notice appears in all copies, and that both that copyright notice
30// and this permission notice appear in supporting documentation. None
31// of the above authors, nor IBM Haifa Research Laboratories, make any
32// representation about the suitability of this software for any
33// purpose. It is provided "as is" without express or implied
34// warranty.
35
36/**
37 * @file cc_hash_table_map_/resize_fn_imps.hpp
38 * Contains implementations of cc_ht_map_'s resize related functions.
39 */
40
41#ifdef PB_DS_CLASS_C_DEC
42
43PB_DS_CLASS_T_DEC
44 inline bool
45PB_DS_CLASS_C_DEC::
46do_resize_if_needed()
47{
48 if (!resize_base::is_resize_needed())
49 return false;
50 resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e));
51 return true;
52}
53
54PB_DS_CLASS_T_DEC
55 void
56PB_DS_CLASS_C_DEC::
57do_resize(size_type len)
58{ resize_imp(resize_base::get_nearest_larger_size(len)); }
59
60PB_DS_CLASS_T_DEC
61 inline void
62PB_DS_CLASS_C_DEC::
63do_resize_if_needed_no_throw()
64{
65 if (!resize_base::is_resize_needed())
66 return;
67
68 __try
69 {
70 resize_imp(resize_base::get_new_size(m_num_e, m_num_used_e));
71 }
72 __catch(...)
73 { }
74
75 PB_DS_ASSERT_VALID((*this))
76}
77
78PB_DS_CLASS_T_DEC
79 void
80PB_DS_CLASS_C_DEC::
81resize_imp(size_type new_size)
82{
83 PB_DS_ASSERT_VALID((*this))
84 if (new_size == m_num_e)
85 return;
86
87 const size_type old_size = m_num_e;
88 entry_pointer_array a_p_entries_resized;
89
90 // Following line might throw an exception.
91 ranged_hash_fn_base::notify_resized(new_size);
92
93 __try
94 {
95 // Following line might throw an exception.
96 a_p_entries_resized = s_entry_pointer_allocator.allocate(new_size);
97 m_num_e = new_size;
98 }
99 __catch(...)
100 {
101 ranged_hash_fn_base::notify_resized(old_size);
102 __throw_exception_again;
103 }
104
105 // At this point no exceptions can be thrown.
106 resize_imp_no_exceptions(new_size, a_p_entries_resized, old_size);
107 Resize_Policy::notify_resized(new_size);
108 PB_DS_ASSERT_VALID((*this))
109}
110
111PB_DS_CLASS_T_DEC
112 void
113PB_DS_CLASS_C_DEC::
114resize_imp_no_exceptions(size_type new_size, entry_pointer_array a_p_entries_resized, size_type old_size)
115{
116 std::fill(a_p_entries_resized, a_p_entries_resized + m_num_e,
117 entry_pointer(0));
118
119 for (size_type pos = 0; pos < old_size; ++pos)
120 {
121 entry_pointer p_e = m_entries[pos];
122 while (p_e != 0)
123 p_e = resize_imp_no_exceptions_reassign_pointer(p_e, a_p_entries_resized, traits_base::m_store_extra_indicator);
124 }
125
126 m_num_e = new_size;
127 _GLIBCXX_DEBUG_ONLY(assert_entry_pointer_array_valid(a_p_entries_resized,
128 __FILE__, __LINE__);)
129 s_entry_pointer_allocator.deallocate(m_entries, old_size);
130 m_entries = a_p_entries_resized;
131 PB_DS_ASSERT_VALID((*this))
132}
133
134#include <ext/pb_ds/detail/cc_hash_table_map_/resize_no_store_hash_fn_imps.hpp>
135#include <ext/pb_ds/detail/cc_hash_table_map_/resize_store_hash_fn_imps.hpp>
136
137#endif
resize_no_store_hash_fn_imps.hpp
resize_store_hash_fn_imps.hpp