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f53d0ff1 PC |
1 | // Memory extensions -*- C++ -*- |
2 | ||
3 | // Copyright (C) 2002 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 | |
7 | // terms of the GNU General Public License as published by the | |
8 | // Free Software Foundation; either version 2, or (at your option) | |
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 | ||
16 | // You should have received a copy of the GNU General Public License along | |
17 | // with this library; see the file COPYING. If not, write to the Free | |
18 | // Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, | |
19 | // USA. | |
20 | ||
21 | // As a special exception, you may use this file as part of a free software | |
22 | // library without restriction. Specifically, if other files instantiate | |
23 | // templates or use macros or inline functions from this file, or you compile | |
24 | // this file and link it with other files to produce an executable, this | |
25 | // file does not by itself cause the resulting executable to be covered by | |
26 | // the GNU General Public License. This exception does not however | |
27 | // invalidate any other reasons why the executable file might be covered by | |
28 | // the GNU General Public License. | |
29 | ||
30 | /* | |
31 | * | |
32 | * Copyright (c) 1994 | |
33 | * Hewlett-Packard Company | |
34 | * | |
35 | * Permission to use, copy, modify, distribute and sell this software | |
36 | * and its documentation for any purpose is hereby granted without fee, | |
37 | * provided that the above copyright notice appear in all copies and | |
38 | * that both that copyright notice and this permission notice appear | |
39 | * in supporting documentation. Hewlett-Packard Company makes no | |
40 | * representations about the suitability of this software for any | |
41 | * purpose. It is provided "as is" without express or implied warranty. | |
42 | * | |
43 | * | |
44 | * Copyright (c) 1996 | |
45 | * Silicon Graphics Computer Systems, Inc. | |
46 | * | |
47 | * Permission to use, copy, modify, distribute and sell this software | |
48 | * and its documentation for any purpose is hereby granted without fee, | |
49 | * provided that the above copyright notice appear in all copies and | |
50 | * that both that copyright notice and this permission notice appear | |
51 | * in supporting documentation. Silicon Graphics makes no | |
52 | * representations about the suitability of this software for any | |
53 | * purpose. It is provided "as is" without express or implied warranty. | |
54 | */ | |
55 | ||
ffe94f83 PE |
56 | /** @file ext/memory |
57 | * This file is a GNU extension to the Standard C++ Library (possibly | |
58 | * containing extensions from the HP/SGI STL subset). You should only | |
59 | * include this header if you are using GCC 3 or later. | |
60 | */ | |
61 | ||
f53d0ff1 | 62 | #ifndef _EXT_MEMORY |
b2acb86f | 63 | #define _EXT_MEMORY 1 |
f53d0ff1 PC |
64 | |
65 | #pragma GCC system_header | |
b2acb86f | 66 | |
54c1bf78 | 67 | #include <memory> |
6b20f9b5 | 68 | #include <bits/stl_tempbuf.h> |
f53d0ff1 PC |
69 | |
70 | namespace __gnu_cxx | |
71 | { | |
3b007b5d | 72 | using std::ptrdiff_t; |
f53d0ff1 PC |
73 | using std::pair; |
74 | using std::__iterator_category; | |
3b007b5d | 75 | using std::_Temporary_buffer; |
f53d0ff1 | 76 | |
f53d0ff1 PC |
77 | template<typename _InputIter, typename _Size, typename _ForwardIter> |
78 | pair<_InputIter, _ForwardIter> | |
79 | __uninitialized_copy_n(_InputIter __first, _Size __count, | |
b2acb86f | 80 | _ForwardIter __result, std::input_iterator_tag) |
f53d0ff1 PC |
81 | { |
82 | _ForwardIter __cur = __result; | |
b2acb86f BK |
83 | try |
84 | { | |
85 | for ( ; __count > 0 ; --__count, ++__first, ++__cur) | |
86 | std::_Construct(&*__cur, *__first); | |
87 | return pair<_InputIter, _ForwardIter>(__first, __cur); | |
88 | } | |
f53d0ff1 PC |
89 | catch(...) |
90 | { | |
91 | std::_Destroy(__result, __cur); | |
92 | __throw_exception_again; | |
93 | } | |
94 | } | |
b2acb86f | 95 | |
f53d0ff1 PC |
96 | template<typename _RandomAccessIter, typename _Size, typename _ForwardIter> |
97 | inline pair<_RandomAccessIter, _ForwardIter> | |
98 | __uninitialized_copy_n(_RandomAccessIter __first, _Size __count, | |
b2acb86f | 99 | _ForwardIter __result, |
f53d0ff1 PC |
100 | std::random_access_iterator_tag) |
101 | { | |
102 | _RandomAccessIter __last = __first + __count; | |
103 | return pair<_RandomAccessIter, _ForwardIter>( | |
104 | __last, | |
105 | std::uninitialized_copy(__first, __last, __result)); | |
106 | } | |
107 | ||
108 | template<typename _InputIter, typename _Size, typename _ForwardIter> | |
109 | inline pair<_InputIter, _ForwardIter> | |
110 | __uninitialized_copy_n(_InputIter __first, _Size __count, | |
b2acb86f BK |
111 | _ForwardIter __result) |
112 | { | |
f53d0ff1 PC |
113 | return __uninitialized_copy_n(__first, __count, __result, |
114 | __iterator_category(__first)); | |
115 | } | |
116 | ||
117 | /** | |
118 | * @brief Copies the range [first,last) into result. | |
119 | * @param first An input iterator. | |
120 | * @param last An input iterator. | |
121 | * @param result An output iterator. | |
122 | * @return result + (first - last) | |
ffe94f83 | 123 | * @ingroup SGIextensions |
f53d0ff1 PC |
124 | * |
125 | * Like copy(), but does not require an initialized output range. | |
126 | */ | |
127 | template<typename _InputIter, typename _Size, typename _ForwardIter> | |
128 | inline pair<_InputIter, _ForwardIter> | |
129 | uninitialized_copy_n(_InputIter __first, _Size __count, | |
b2acb86f BK |
130 | _ForwardIter __result) |
131 | { | |
f53d0ff1 PC |
132 | return __uninitialized_copy_n(__first, __count, __result, |
133 | __iterator_category(__first)); | |
134 | } | |
135 | ||
3b007b5d PC |
136 | |
137 | /** | |
ffe94f83 PE |
138 | * This class provides similar behavior and semantics of the standard |
139 | * functions get_temporary_buffer() and return_temporary_buffer(), but | |
140 | * encapsulated in a type vaguely resembling a standard container. | |
141 | * | |
142 | * By default, a temporary_buffer<Iter> stores space for objects of | |
143 | * whatever type the Iter iterator points to. It is constructed from a | |
144 | * typical [first,last) range, and provides the begin(), end(), size() | |
145 | * functions, as well as requested_size(). For non-trivial types, copies | |
146 | * of *first will be used to initialize the storage. | |
147 | * | |
148 | * @c malloc is used to obtain underlying storage. | |
149 | * | |
150 | * Like get_temporary_buffer(), not all the requested memory may be | |
151 | * available. Ideally, the created buffer will be large enough to hold a | |
152 | * copy of [first,last), but if size() is less than requested_size(), | |
153 | * then this didn't happen. | |
154 | * | |
6b20f9b5 PE |
155 | * @ingroup SGIextensions |
156 | */ | |
b2acb86f | 157 | template <class _ForwardIterator, class _Tp |
6b20f9b5 | 158 | = typename std::iterator_traits<_ForwardIterator>::value_type > |
3b007b5d PC |
159 | struct temporary_buffer : public _Temporary_buffer<_ForwardIterator, _Tp> |
160 | { | |
ffe94f83 | 161 | /// Requests storage large enough to hold a copy of [first,last). |
3b007b5d | 162 | temporary_buffer(_ForwardIterator __first, _ForwardIterator __last) |
b2acb86f BK |
163 | : _Temporary_buffer<_ForwardIterator, _Tp>(__first, __last) { } |
164 | ||
ffe94f83 | 165 | /// Destroys objects and frees storage. |
b2acb86f | 166 | ~temporary_buffer() { } |
3b007b5d | 167 | }; |
f53d0ff1 PC |
168 | } // namespace __gnu_cxx |
169 | ||
b2acb86f | 170 | #endif |
f53d0ff1 | 171 |