]>
Commit | Line | Data |
---|---|---|
e8eb60bd JW |
1 | // Allocator traits -*- C++ -*- |
2 | ||
a945c346 | 3 | // Copyright (C) 2011-2024 Free Software Foundation, Inc. |
e8eb60bd JW |
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 3, 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 | // 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 | /** @file ext/alloc_traits.h | |
26 | * This file is a GNU extension to the Standard C++ Library. | |
27 | */ | |
28 | ||
29 | #ifndef _EXT_ALLOC_TRAITS_H | |
30 | #define _EXT_ALLOC_TRAITS_H 1 | |
31 | ||
32 | #pragma GCC system_header | |
33 | ||
e8eb60bd | 34 | # include <bits/alloc_traits.h> |
e8eb60bd JW |
35 | |
36 | namespace __gnu_cxx _GLIBCXX_VISIBILITY(default) | |
37 | { | |
38 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
39 | ||
d526242c | 40 | /** |
a2b5fdcb | 41 | * @brief Uniform interface to C++98 and C++11 allocators. |
d526242c JW |
42 | * @ingroup allocators |
43 | */ | |
6d82c562 | 44 | template<typename _Alloc, typename = typename _Alloc::value_type> |
e8eb60bd | 45 | struct __alloc_traits |
734f5023 | 46 | #if __cplusplus >= 201103L |
e8eb60bd JW |
47 | : std::allocator_traits<_Alloc> |
48 | #endif | |
49 | { | |
50 | typedef _Alloc allocator_type; | |
734f5023 | 51 | #if __cplusplus >= 201103L |
e8eb60bd JW |
52 | typedef std::allocator_traits<_Alloc> _Base_type; |
53 | typedef typename _Base_type::value_type value_type; | |
54 | typedef typename _Base_type::pointer pointer; | |
55 | typedef typename _Base_type::const_pointer const_pointer; | |
56 | typedef typename _Base_type::size_type size_type; | |
605aed29 | 57 | typedef typename _Base_type::difference_type difference_type; |
20067423 | 58 | // C++11 allocators do not define reference or const_reference |
e8eb60bd JW |
59 | typedef value_type& reference; |
60 | typedef const value_type& const_reference; | |
61 | using _Base_type::allocate; | |
62 | using _Base_type::deallocate; | |
63 | using _Base_type::construct; | |
64 | using _Base_type::destroy; | |
73f05031 | 65 | using _Base_type::max_size; |
e8eb60bd | 66 | |
d526242c JW |
67 | private: |
68 | template<typename _Ptr> | |
20067423 JW |
69 | using __is_custom_pointer |
70 | = std::__and_<std::is_same<pointer, _Ptr>, | |
71 | std::__not_<std::is_pointer<_Ptr>>>; | |
d526242c JW |
72 | |
73 | public: | |
73f05031 | 74 | // overload construct for non-standard pointer types |
d526242c | 75 | template<typename _Ptr, typename... _Args> |
9d549401 | 76 | [[__gnu__::__always_inline__]] |
540218dd JW |
77 | static _GLIBCXX14_CONSTEXPR |
78 | std::__enable_if_t<__is_custom_pointer<_Ptr>::value> | |
d526242c | 79 | construct(_Alloc& __a, _Ptr __p, _Args&&... __args) |
0f317ef7 MG |
80 | noexcept(noexcept(_Base_type::construct(__a, std::__to_address(__p), |
81 | std::forward<_Args>(__args)...))) | |
d526242c | 82 | { |
2af96386 | 83 | _Base_type::construct(__a, std::__to_address(__p), |
d526242c JW |
84 | std::forward<_Args>(__args)...); |
85 | } | |
86 | ||
73f05031 | 87 | // overload destroy for non-standard pointer types |
d526242c | 88 | template<typename _Ptr> |
9d549401 | 89 | [[__gnu__::__always_inline__]] |
540218dd JW |
90 | static _GLIBCXX14_CONSTEXPR |
91 | std::__enable_if_t<__is_custom_pointer<_Ptr>::value> | |
d526242c | 92 | destroy(_Alloc& __a, _Ptr __p) |
0f317ef7 | 93 | noexcept(noexcept(_Base_type::destroy(__a, std::__to_address(__p)))) |
2af96386 | 94 | { _Base_type::destroy(__a, std::__to_address(__p)); } |
d526242c | 95 | |
9d549401 | 96 | [[__gnu__::__always_inline__]] |
85f24114 | 97 | static constexpr _Alloc _S_select_on_copy(const _Alloc& __a) |
e8eb60bd JW |
98 | { return _Base_type::select_on_container_copy_construction(__a); } |
99 | ||
9d549401 | 100 | [[__gnu__::__always_inline__]] |
540218dd | 101 | static _GLIBCXX14_CONSTEXPR void _S_on_swap(_Alloc& __a, _Alloc& __b) |
e8eb60bd JW |
102 | { std::__alloc_on_swap(__a, __b); } |
103 | ||
9d549401 | 104 | [[__gnu__::__always_inline__]] |
e8eb60bd JW |
105 | static constexpr bool _S_propagate_on_copy_assign() |
106 | { return _Base_type::propagate_on_container_copy_assignment::value; } | |
107 | ||
9d549401 | 108 | [[__gnu__::__always_inline__]] |
e8eb60bd JW |
109 | static constexpr bool _S_propagate_on_move_assign() |
110 | { return _Base_type::propagate_on_container_move_assignment::value; } | |
111 | ||
9d549401 | 112 | [[__gnu__::__always_inline__]] |
e8eb60bd JW |
113 | static constexpr bool _S_propagate_on_swap() |
114 | { return _Base_type::propagate_on_container_swap::value; } | |
115 | ||
9d549401 | 116 | [[__gnu__::__always_inline__]] |
d526242c | 117 | static constexpr bool _S_always_equal() |
a2b5fdcb | 118 | { return _Base_type::is_always_equal::value; } |
d526242c | 119 | |
9d549401 | 120 | __attribute__((__always_inline__)) |
d526242c JW |
121 | static constexpr bool _S_nothrow_move() |
122 | { return _S_propagate_on_move_assign() || _S_always_equal(); } | |
123 | ||
73f05031 JW |
124 | template<typename _Tp> |
125 | struct rebind | |
7579d15b | 126 | { typedef typename _Base_type::template rebind_alloc<_Tp> other; }; |
85f24114 | 127 | #else // ! C++11 |
e8eb60bd JW |
128 | |
129 | typedef typename _Alloc::pointer pointer; | |
130 | typedef typename _Alloc::const_pointer const_pointer; | |
131 | typedef typename _Alloc::value_type value_type; | |
132 | typedef typename _Alloc::reference reference; | |
133 | typedef typename _Alloc::const_reference const_reference; | |
134 | typedef typename _Alloc::size_type size_type; | |
605aed29 | 135 | typedef typename _Alloc::difference_type difference_type; |
e8eb60bd | 136 | |
9d549401 JW |
137 | __attribute__((__always_inline__)) _GLIBCXX_NODISCARD |
138 | static pointer | |
e8eb60bd JW |
139 | allocate(_Alloc& __a, size_type __n) |
140 | { return __a.allocate(__n); } | |
141 | ||
603aec67 | 142 | template<typename _Hint> |
9d549401 JW |
143 | __attribute__((__always_inline__)) _GLIBCXX_NODISCARD |
144 | static pointer | |
603aec67 JW |
145 | allocate(_Alloc& __a, size_type __n, _Hint __hint) |
146 | { return __a.allocate(__n, __hint); } | |
147 | ||
9d549401 | 148 | __attribute__((__always_inline__)) |
e8eb60bd JW |
149 | static void deallocate(_Alloc& __a, pointer __p, size_type __n) |
150 | { __a.deallocate(__p, __n); } | |
151 | ||
152 | template<typename _Tp> | |
9d549401 | 153 | __attribute__((__always_inline__)) |
e8eb60bd JW |
154 | static void construct(_Alloc& __a, pointer __p, const _Tp& __arg) |
155 | { __a.construct(__p, __arg); } | |
156 | ||
9d549401 | 157 | __attribute__((__always_inline__)) |
e8eb60bd JW |
158 | static void destroy(_Alloc& __a, pointer __p) |
159 | { __a.destroy(__p); } | |
160 | ||
9d549401 | 161 | __attribute__((__always_inline__)) |
73f05031 JW |
162 | static size_type max_size(const _Alloc& __a) |
163 | { return __a.max_size(); } | |
164 | ||
9d549401 | 165 | __attribute__((__always_inline__)) |
e8eb60bd JW |
166 | static const _Alloc& _S_select_on_copy(const _Alloc& __a) { return __a; } |
167 | ||
9d549401 | 168 | __attribute__((__always_inline__)) |
e8eb60bd JW |
169 | static void _S_on_swap(_Alloc& __a, _Alloc& __b) |
170 | { | |
171 | // _GLIBCXX_RESOLVE_LIB_DEFECTS | |
172 | // 431. Swapping containers with unequal allocators. | |
173 | std::__alloc_swap<_Alloc>::_S_do_it(__a, __b); | |
174 | } | |
73f05031 JW |
175 | |
176 | template<typename _Tp> | |
177 | struct rebind | |
178 | { typedef typename _Alloc::template rebind<_Tp>::other other; }; | |
85f24114 | 179 | #endif // C++11 |
e8eb60bd JW |
180 | }; |
181 | ||
182 | _GLIBCXX_END_NAMESPACE_VERSION | |
484dc599 | 183 | } // namespace __gnu_cxx |
e8eb60bd JW |
184 | |
185 | #endif |