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5ebed336 | 1 | // Memory extensions -*- C++ -*- |
2 | ||
f1717362 | 3 | // Copyright (C) 2002-2016 Free Software Foundation, Inc. |
5ebed336 | 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 | |
6bc9506f | 8 | // Free Software Foundation; either version 3, or (at your option) |
5ebed336 | 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 | ||
6bc9506f | 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. | |
5ebed336 | 19 | |
6bc9506f | 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/>. | |
5ebed336 | 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 | ||
f51d6a00 | 51 | /** @file ext/memory |
52 | * This file is a GNU extension to the Standard C++ Library (possibly | |
b2a66747 | 53 | * containing extensions from the HP/SGI STL subset). |
f51d6a00 | 54 | */ |
55 | ||
5ebed336 | 56 | #ifndef _EXT_MEMORY |
3305f7d0 | 57 | #define _EXT_MEMORY 1 |
5ebed336 | 58 | |
59 | #pragma GCC system_header | |
3305f7d0 | 60 | |
e1e0016d | 61 | #include <memory> |
762a8ed1 | 62 | #include <bits/stl_tempbuf.h> |
5ebed336 | 63 | |
2948dd21 | 64 | namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) |
65 | { | |
66 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
1069247d | 67 | |
51a555a4 | 68 | using std::ptrdiff_t; |
5ebed336 | 69 | using std::pair; |
70 | using std::__iterator_category; | |
51a555a4 | 71 | using std::_Temporary_buffer; |
bbd02464 | 72 | |
5ebed336 | 73 | template<typename _InputIter, typename _Size, typename _ForwardIter> |
74 | pair<_InputIter, _ForwardIter> | |
75 | __uninitialized_copy_n(_InputIter __first, _Size __count, | |
3305f7d0 | 76 | _ForwardIter __result, std::input_iterator_tag) |
5ebed336 | 77 | { |
78 | _ForwardIter __cur = __result; | |
b1a09c64 | 79 | __try |
3305f7d0 | 80 | { |
4cf5c70f | 81 | for (; __count > 0 ; --__count, ++__first, ++__cur) |
3305f7d0 | 82 | std::_Construct(&*__cur, *__first); |
83 | return pair<_InputIter, _ForwardIter>(__first, __cur); | |
84 | } | |
b1a09c64 | 85 | __catch(...) |
5ebed336 | 86 | { |
87 | std::_Destroy(__result, __cur); | |
bbd02464 | 88 | __throw_exception_again; |
5ebed336 | 89 | } |
90 | } | |
bbd02464 | 91 | |
5ebed336 | 92 | template<typename _RandomAccessIter, typename _Size, typename _ForwardIter> |
93 | inline pair<_RandomAccessIter, _ForwardIter> | |
94 | __uninitialized_copy_n(_RandomAccessIter __first, _Size __count, | |
bbd02464 | 95 | _ForwardIter __result, |
5ebed336 | 96 | std::random_access_iterator_tag) |
97 | { | |
98 | _RandomAccessIter __last = __first + __count; | |
4cf5c70f | 99 | return (pair<_RandomAccessIter, _ForwardIter> |
100 | (__last, std::uninitialized_copy(__first, __last, __result))); | |
5ebed336 | 101 | } |
102 | ||
103 | template<typename _InputIter, typename _Size, typename _ForwardIter> | |
104 | inline pair<_InputIter, _ForwardIter> | |
105 | __uninitialized_copy_n(_InputIter __first, _Size __count, | |
b9ca25ed | 106 | _ForwardIter __result) |
107 | { return __gnu_cxx::__uninitialized_copy_n(__first, __count, __result, | |
108 | __iterator_category(__first)); } | |
5ebed336 | 109 | |
110 | /** | |
111 | * @brief Copies the range [first,last) into result. | |
e12e4f3b | 112 | * @param __first An input iterator. |
113 | * @param __count Length | |
114 | * @param __result An output iterator. | |
115 | * @return __result + (__first + __count) | |
f51d6a00 | 116 | * @ingroup SGIextensions |
5ebed336 | 117 | * |
118 | * Like copy(), but does not require an initialized output range. | |
119 | */ | |
120 | template<typename _InputIter, typename _Size, typename _ForwardIter> | |
121 | inline pair<_InputIter, _ForwardIter> | |
122 | uninitialized_copy_n(_InputIter __first, _Size __count, | |
bbd02464 | 123 | _ForwardIter __result) |
b9ca25ed | 124 | { return __gnu_cxx::__uninitialized_copy_n(__first, __count, __result, |
125 | __iterator_category(__first)); } | |
51a555a4 | 126 | |
e1d16db9 | 127 | |
128 | // An alternative version of uninitialized_copy_n that constructs | |
129 | // and destroys objects with a user-provided allocator. | |
130 | template<typename _InputIter, typename _Size, typename _ForwardIter, | |
131 | typename _Allocator> | |
132 | pair<_InputIter, _ForwardIter> | |
133 | __uninitialized_copy_n_a(_InputIter __first, _Size __count, | |
134 | _ForwardIter __result, | |
135 | _Allocator __alloc) | |
136 | { | |
137 | _ForwardIter __cur = __result; | |
b1a09c64 | 138 | __try |
e1d16db9 | 139 | { |
140 | for (; __count > 0 ; --__count, ++__first, ++__cur) | |
141 | __alloc.construct(&*__cur, *__first); | |
142 | return pair<_InputIter, _ForwardIter>(__first, __cur); | |
143 | } | |
b1a09c64 | 144 | __catch(...) |
e1d16db9 | 145 | { |
146 | std::_Destroy(__result, __cur, __alloc); | |
147 | __throw_exception_again; | |
148 | } | |
149 | } | |
150 | ||
151 | template<typename _InputIter, typename _Size, typename _ForwardIter, | |
152 | typename _Tp> | |
153 | inline pair<_InputIter, _ForwardIter> | |
154 | __uninitialized_copy_n_a(_InputIter __first, _Size __count, | |
155 | _ForwardIter __result, | |
156 | std::allocator<_Tp>) | |
157 | { | |
b9ca25ed | 158 | return __gnu_cxx::uninitialized_copy_n(__first, __count, __result); |
e1d16db9 | 159 | } |
160 | ||
51a555a4 | 161 | /** |
f51d6a00 | 162 | * This class provides similar behavior and semantics of the standard |
163 | * functions get_temporary_buffer() and return_temporary_buffer(), but | |
164 | * encapsulated in a type vaguely resembling a standard container. | |
165 | * | |
166 | * By default, a temporary_buffer<Iter> stores space for objects of | |
167 | * whatever type the Iter iterator points to. It is constructed from a | |
168 | * typical [first,last) range, and provides the begin(), end(), size() | |
169 | * functions, as well as requested_size(). For non-trivial types, copies | |
170 | * of *first will be used to initialize the storage. | |
171 | * | |
172 | * @c malloc is used to obtain underlying storage. | |
173 | * | |
174 | * Like get_temporary_buffer(), not all the requested memory may be | |
175 | * available. Ideally, the created buffer will be large enough to hold a | |
176 | * copy of [first,last), but if size() is less than requested_size(), | |
177 | * then this didn't happen. | |
178 | * | |
762a8ed1 | 179 | * @ingroup SGIextensions |
180 | */ | |
bbd02464 | 181 | template <class _ForwardIterator, class _Tp |
4cf5c70f | 182 | = typename std::iterator_traits<_ForwardIterator>::value_type > |
183 | struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp> | |
184 | { | |
185 | /// Requests storage large enough to hold a copy of [first,last). | |
186 | temporary_buffer(_ForwardIterator __first, _ForwardIterator __last) | |
187 | : _Temporary_buffer<_ForwardIterator, _Tp>(__first, __last) { } | |
188 | ||
189 | /// Destroys objects and frees storage. | |
190 | ~temporary_buffer() { } | |
191 | }; | |
1069247d | 192 | |
2948dd21 | 193 | _GLIBCXX_END_NAMESPACE_VERSION |
194 | } // namespace | |
5ebed336 | 195 | |
3305f7d0 | 196 | #endif |
5ebed336 | 197 |