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f53d0ff1 PC |
1 | // Memory extensions -*- C++ -*- |
2 | ||
99dee823 | 3 | // Copyright (C) 2002-2021 Free Software Foundation, Inc. |
f53d0ff1 PC |
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 | |
7 | // terms of the GNU General Public License as published by the | |
748086b7 | 8 | // Free Software Foundation; either version 3, or (at your option) |
f53d0ff1 PC |
9 | // any later version. |
10 | ||
11 | // This library is distributed in the hope that it will be useful, | |
12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | // GNU General Public License for more details. | |
15 | ||
748086b7 JJ |
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. | |
f53d0ff1 | 19 | |
748086b7 JJ |
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/>. | |
f53d0ff1 PC |
24 | |
25 | /* | |
26 | * | |
27 | * Copyright (c) 1994 | |
28 | * Hewlett-Packard Company | |
29 | * | |
30 | * Permission to use, copy, modify, distribute and sell this software | |
31 | * and its documentation for any purpose is hereby granted without fee, | |
32 | * provided that the above copyright notice appear in all copies and | |
33 | * that both that copyright notice and this permission notice appear | |
34 | * in supporting documentation. Hewlett-Packard Company makes no | |
35 | * representations about the suitability of this software for any | |
36 | * purpose. It is provided "as is" without express or implied warranty. | |
37 | * | |
38 | * | |
39 | * Copyright (c) 1996 | |
40 | * Silicon Graphics Computer Systems, Inc. | |
41 | * | |
42 | * Permission to use, copy, modify, distribute and sell this software | |
43 | * and its documentation for any purpose is hereby granted without fee, | |
44 | * provided that the above copyright notice appear in all copies and | |
45 | * that both that copyright notice and this permission notice appear | |
46 | * in supporting documentation. Silicon Graphics makes no | |
47 | * representations about the suitability of this software for any | |
48 | * purpose. It is provided "as is" without express or implied warranty. | |
49 | */ | |
50 | ||
ffe94f83 PE |
51 | /** @file ext/memory |
52 | * This file is a GNU extension to the Standard C++ Library (possibly | |
0aa06b18 | 53 | * containing extensions from the HP/SGI STL subset). |
ffe94f83 PE |
54 | */ |
55 | ||
f53d0ff1 | 56 | #ifndef _EXT_MEMORY |
b2acb86f | 57 | #define _EXT_MEMORY 1 |
f53d0ff1 PC |
58 | |
59 | #pragma GCC system_header | |
b2acb86f | 60 | |
54c1bf78 | 61 | #include <memory> |
6b20f9b5 | 62 | #include <bits/stl_tempbuf.h> |
f53d0ff1 | 63 | |
12ffa228 BK |
64 | namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) |
65 | { | |
66 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
3cbc7af0 | 67 | |
3b007b5d | 68 | using std::_Temporary_buffer; |
fa30fe72 | 69 | |
f53d0ff1 | 70 | template<typename _InputIter, typename _Size, typename _ForwardIter> |
3263fb9c | 71 | std::pair<_InputIter, _ForwardIter> |
f53d0ff1 | 72 | __uninitialized_copy_n(_InputIter __first, _Size __count, |
b2acb86f | 73 | _ForwardIter __result, std::input_iterator_tag) |
f53d0ff1 PC |
74 | { |
75 | _ForwardIter __cur = __result; | |
bc2631e0 | 76 | __try |
b2acb86f | 77 | { |
d962e073 | 78 | for (; __count > 0 ; --__count, ++__first, ++__cur) |
b2acb86f | 79 | std::_Construct(&*__cur, *__first); |
3263fb9c | 80 | return std::pair<_InputIter, _ForwardIter>(__first, __cur); |
b2acb86f | 81 | } |
bc2631e0 | 82 | __catch(...) |
f53d0ff1 PC |
83 | { |
84 | std::_Destroy(__result, __cur); | |
fa30fe72 | 85 | __throw_exception_again; |
f53d0ff1 PC |
86 | } |
87 | } | |
fa30fe72 | 88 | |
f53d0ff1 | 89 | template<typename _RandomAccessIter, typename _Size, typename _ForwardIter> |
3263fb9c | 90 | inline std::pair<_RandomAccessIter, _ForwardIter> |
f53d0ff1 | 91 | __uninitialized_copy_n(_RandomAccessIter __first, _Size __count, |
fa30fe72 | 92 | _ForwardIter __result, |
f53d0ff1 PC |
93 | std::random_access_iterator_tag) |
94 | { | |
95 | _RandomAccessIter __last = __first + __count; | |
3263fb9c | 96 | return (std::pair<_RandomAccessIter, _ForwardIter> |
d962e073 | 97 | (__last, std::uninitialized_copy(__first, __last, __result))); |
f53d0ff1 PC |
98 | } |
99 | ||
100 | template<typename _InputIter, typename _Size, typename _ForwardIter> | |
3263fb9c | 101 | inline std::pair<_InputIter, _ForwardIter> |
f53d0ff1 | 102 | __uninitialized_copy_n(_InputIter __first, _Size __count, |
a67b92c3 | 103 | _ForwardIter __result) |
3263fb9c JW |
104 | { |
105 | return __gnu_cxx::__uninitialized_copy_n(__first, __count, __result, | |
106 | std::__iterator_category(__first)); | |
107 | } | |
f53d0ff1 PC |
108 | |
109 | /** | |
110 | * @brief Copies the range [first,last) into result. | |
93c66bc6 BK |
111 | * @param __first An input iterator. |
112 | * @param __count Length | |
113 | * @param __result An output iterator. | |
114 | * @return __result + (__first + __count) | |
ffe94f83 | 115 | * @ingroup SGIextensions |
f53d0ff1 PC |
116 | * |
117 | * Like copy(), but does not require an initialized output range. | |
118 | */ | |
119 | template<typename _InputIter, typename _Size, typename _ForwardIter> | |
3263fb9c | 120 | inline std::pair<_InputIter, _ForwardIter> |
f53d0ff1 | 121 | uninitialized_copy_n(_InputIter __first, _Size __count, |
fa30fe72 | 122 | _ForwardIter __result) |
3263fb9c JW |
123 | { |
124 | return __gnu_cxx::__uninitialized_copy_n(__first, __count, __result, | |
125 | std::__iterator_category(__first)); | |
126 | } | |
3b007b5d | 127 | |
1985f1cd MA |
128 | |
129 | // An alternative version of uninitialized_copy_n that constructs | |
130 | // and destroys objects with a user-provided allocator. | |
131 | template<typename _InputIter, typename _Size, typename _ForwardIter, | |
132 | typename _Allocator> | |
3263fb9c | 133 | std::pair<_InputIter, _ForwardIter> |
1985f1cd MA |
134 | __uninitialized_copy_n_a(_InputIter __first, _Size __count, |
135 | _ForwardIter __result, | |
136 | _Allocator __alloc) | |
137 | { | |
138 | _ForwardIter __cur = __result; | |
bc2631e0 | 139 | __try |
1985f1cd MA |
140 | { |
141 | for (; __count > 0 ; --__count, ++__first, ++__cur) | |
142 | __alloc.construct(&*__cur, *__first); | |
3263fb9c | 143 | return std::pair<_InputIter, _ForwardIter>(__first, __cur); |
1985f1cd | 144 | } |
bc2631e0 | 145 | __catch(...) |
1985f1cd MA |
146 | { |
147 | std::_Destroy(__result, __cur, __alloc); | |
148 | __throw_exception_again; | |
149 | } | |
150 | } | |
151 | ||
152 | template<typename _InputIter, typename _Size, typename _ForwardIter, | |
153 | typename _Tp> | |
3263fb9c | 154 | inline std::pair<_InputIter, _ForwardIter> |
1985f1cd MA |
155 | __uninitialized_copy_n_a(_InputIter __first, _Size __count, |
156 | _ForwardIter __result, | |
157 | std::allocator<_Tp>) | |
158 | { | |
a67b92c3 | 159 | return __gnu_cxx::uninitialized_copy_n(__first, __count, __result); |
1985f1cd MA |
160 | } |
161 | ||
3b007b5d | 162 | /** |
ffe94f83 PE |
163 | * This class provides similar behavior and semantics of the standard |
164 | * functions get_temporary_buffer() and return_temporary_buffer(), but | |
165 | * encapsulated in a type vaguely resembling a standard container. | |
166 | * | |
167 | * By default, a temporary_buffer<Iter> stores space for objects of | |
168 | * whatever type the Iter iterator points to. It is constructed from a | |
169 | * typical [first,last) range, and provides the begin(), end(), size() | |
170 | * functions, as well as requested_size(). For non-trivial types, copies | |
171 | * of *first will be used to initialize the storage. | |
172 | * | |
173 | * @c malloc is used to obtain underlying storage. | |
174 | * | |
175 | * Like get_temporary_buffer(), not all the requested memory may be | |
176 | * available. Ideally, the created buffer will be large enough to hold a | |
177 | * copy of [first,last), but if size() is less than requested_size(), | |
178 | * then this didn't happen. | |
179 | * | |
6b20f9b5 PE |
180 | * @ingroup SGIextensions |
181 | */ | |
fa30fe72 | 182 | template <class _ForwardIterator, class _Tp |
d962e073 PC |
183 | = typename std::iterator_traits<_ForwardIterator>::value_type > |
184 | struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp> | |
185 | { | |
186 | /// Requests storage large enough to hold a copy of [first,last). | |
187 | temporary_buffer(_ForwardIterator __first, _ForwardIterator __last) | |
d31238cf FD |
188 | : _Temporary_buffer<_ForwardIterator, _Tp>(__first, |
189 | std::distance(__first, __last)) | |
190 | { } | |
d962e073 PC |
191 | |
192 | /// Destroys objects and frees storage. | |
193 | ~temporary_buffer() { } | |
194 | }; | |
3cbc7af0 | 195 | |
12ffa228 BK |
196 | _GLIBCXX_END_NAMESPACE_VERSION |
197 | } // namespace | |
f53d0ff1 | 198 | |
b2acb86f | 199 | #endif |
f53d0ff1 | 200 |