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54c1bf78 | 1 | // <memory> -*- C++ -*- |
de96ac46 | 2 | |
818ab71a | 3 | // Copyright (C) 2001-2016 Free Software Foundation, Inc. |
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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) |
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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. | |
de96ac46 | 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/>. | |
de96ac46 | 24 | |
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25 | /* |
26 | * Copyright (c) 1997-1999 | |
27 | * Silicon Graphics Computer Systems, Inc. | |
28 | * | |
29 | * Permission to use, copy, modify, distribute and sell this software | |
30 | * and its documentation for any purpose is hereby granted without fee, | |
31 | * provided that the above copyright notice appear in all copies and | |
32 | * that both that copyright notice and this permission notice appear | |
33 | * in supporting documentation. Silicon Graphics makes no | |
34 | * representations about the suitability of this software for any | |
35 | * purpose. It is provided "as is" without express or implied warranty. | |
36 | * | |
37 | */ | |
38 | ||
143c27b0 | 39 | /** @file include/memory |
0aa06b18 | 40 | * This is a Standard C++ Library header. |
2f9d51b8 PE |
41 | */ |
42 | ||
1143680e SE |
43 | #ifndef _GLIBCXX_MEMORY |
44 | #define _GLIBCXX_MEMORY 1 | |
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45 | |
46 | #pragma GCC system_header | |
47 | ||
8e32aa11 BK |
48 | /** |
49 | * @defgroup memory Memory | |
50 | * @ingroup utilities | |
51 | * | |
52 | * Components for memory allocation, deallocation, and management. | |
53 | */ | |
54 | ||
55 | /** | |
56 | * @defgroup pointer_abstractions Pointer Abstractions | |
57 | * @ingroup memory | |
58 | * | |
59 | * Smart pointers, etc. | |
60 | */ | |
61 | ||
acb8a4ef PC |
62 | #include <bits/stl_algobase.h> |
63 | #include <bits/allocator.h> | |
64 | #include <bits/stl_construct.h> | |
65 | #include <bits/stl_uninitialized.h> | |
66 | #include <bits/stl_tempbuf.h> | |
acb8a4ef | 67 | #include <bits/stl_raw_storage_iter.h> |
54c1bf78 | 68 | |
734f5023 | 69 | #if __cplusplus >= 201103L |
e133ace8 | 70 | # include <exception> // std::exception |
e133ace8 | 71 | # include <typeinfo> // std::type_info in get_deleter |
e133ace8 PC |
72 | # include <iosfwd> // std::basic_ostream |
73 | # include <ext/atomicity.h> | |
74 | # include <ext/concurrence.h> | |
75 | # include <bits/functexcept.h> | |
76 | # include <bits/stl_function.h> // std::less | |
e8eb60bd | 77 | # include <bits/uses_allocator.h> |
e133ace8 | 78 | # include <type_traits> |
8e32aa11 | 79 | # include <debug/debug.h> |
6e48db73 JW |
80 | # include <bits/unique_ptr.h> |
81 | # include <bits/shared_ptr.h> | |
be8de894 | 82 | # include <bits/shared_ptr_atomic.h> |
e1bcd685 | 83 | # if _GLIBCXX_USE_DEPRECATED |
40abbf1f BK |
84 | # include <backward/auto_ptr.h> |
85 | # endif | |
40abbf1f BK |
86 | #else |
87 | # include <backward/auto_ptr.h> | |
af13a7a6 BK |
88 | #endif |
89 | ||
2f6ca9d3 RS |
90 | #if __cplusplus >= 201103L |
91 | # include <cstdint> | |
92 | # ifdef _GLIBCXX_USE_C99_STDINT_TR1 | |
93 | namespace std _GLIBCXX_VISIBILITY(default) | |
94 | { | |
95 | _GLIBCXX_BEGIN_NAMESPACE_VERSION | |
96 | ||
97 | /** | |
98 | * @brief Fit aligned storage in buffer. | |
99 | * | |
100 | * [ptr.align] | |
101 | * | |
102 | * This function tries to fit @a __size bytes of storage with alignment | |
103 | * @a __align into the buffer @a __ptr of size @a __space bytes. If such | |
104 | * a buffer fits then @a __ptr is changed to point to the first byte of the | |
105 | * aligned storage and @a __space is reduced by the bytes used for alignment. | |
106 | * | |
107 | * @param __align A fundamental or extended alignment value. | |
108 | * @param __size Size of the aligned storage required. | |
109 | * @param __ptr Pointer to a buffer of @a __space bytes. | |
110 | * @param __space Size of the buffer pointed to by @a __ptr. | |
111 | * @return the updated pointer if the aligned storage fits, otherwise nullptr. | |
112 | */ | |
113 | inline void* | |
114 | align(size_t __align, size_t __size, void*& __ptr, size_t& __space) noexcept | |
115 | { | |
01d6452f JW |
116 | const auto __intptr = reinterpret_cast<uintptr_t>(__ptr); |
117 | const auto __aligned = (__intptr - 1u + __align) & -__align; | |
118 | const auto __diff = __aligned - __intptr; | |
119 | if ((__size + __diff) > __space) | |
2f6ca9d3 RS |
120 | return nullptr; |
121 | else | |
122 | { | |
123 | __space -= __diff; | |
01d6452f | 124 | return __ptr = reinterpret_cast<void*>(__aligned); |
2f6ca9d3 RS |
125 | } |
126 | } | |
127 | ||
6fc456c3 JW |
128 | // 20.7.4 [util.dynamic.safety], pointer safety |
129 | ||
130 | enum class pointer_safety { relaxed, preferred, strict }; | |
131 | ||
132 | inline void | |
133 | declare_reachable(void*) { } | |
134 | ||
135 | template <class T> | |
136 | inline T* | |
137 | undeclare_reachable(T* __p) { return __p; } | |
138 | ||
139 | inline void | |
140 | declare_no_pointers(char*, size_t) { } | |
141 | ||
142 | inline void | |
143 | undeclare_no_pointers(char*, size_t) { } | |
144 | ||
145 | inline pointer_safety | |
146 | get_pointer_safety() noexcept { return pointer_safety::relaxed; } | |
147 | ||
2f6ca9d3 RS |
148 | _GLIBCXX_END_NAMESPACE_VERSION |
149 | } // namespace | |
150 | #endif // _GLIBCXX_USE_C99_STDINT_TR1 | |
151 | #endif // C++11 | |
152 | ||
1143680e | 153 | #endif /* _GLIBCXX_MEMORY */ |