[1166] | 1 | // -*- C++ -*- header.
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| 2 |
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| 3 | // Copyright (C) 2008-2021 Free Software Foundation, Inc.
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| 4 | //
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| 5 | // This file is part of the GNU ISO C++ Library. This library is free
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| 6 | // software; you can redistribute it and/or modify it under the
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| 7 | // terms of the GNU General Public License as published by the
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| 8 | // Free Software Foundation; either version 3, or (at your option)
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| 9 | // any later version.
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| 10 |
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| 11 | // This library is distributed in the hope that it will be useful,
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| 12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | // GNU General Public License for more details.
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| 15 |
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| 16 | // Under Section 7 of GPL version 3, you are granted additional
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| 17 | // permissions described in the GCC Runtime Library Exception, version
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| 18 | // 3.1, as published by the Free Software Foundation.
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| 19 |
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| 20 | // You should have received a copy of the GNU General Public License and
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| 21 | // a copy of the GCC Runtime Library Exception along with this program;
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| 22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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| 23 | // <http://www.gnu.org/licenses/>.
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| 24 |
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| 25 | /** @file include/atomic
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| 26 | * This is a Standard C++ Library header.
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| 27 | */
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| 28 |
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| 29 | // Based on "C++ Atomic Types and Operations" by Hans Boehm and Lawrence Crowl.
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| 30 | // http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2007/n2427.html
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| 31 |
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| 32 | #ifndef _GLIBCXX_ATOMIC
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| 33 | #define _GLIBCXX_ATOMIC 1
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| 34 |
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| 35 | #pragma GCC system_header
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| 36 |
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| 37 | #if __cplusplus < 201103L
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| 38 | # include <bits/c++0x_warning.h>
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| 39 | #else
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| 40 |
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| 41 | #include <bits/atomic_base.h>
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| 42 |
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| 43 | namespace std _GLIBCXX_VISIBILITY(default)
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| 44 | {
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| 45 | _GLIBCXX_BEGIN_NAMESPACE_VERSION
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| 46 |
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| 47 | /**
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| 48 | * @addtogroup atomics
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| 49 | * @{
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| 50 | */
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| 51 |
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| 52 | #if __cplusplus >= 201703L
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| 53 | # define __cpp_lib_atomic_is_always_lock_free 201603
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| 54 | #endif
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| 55 |
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| 56 | template<typename _Tp>
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| 57 | struct atomic;
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| 58 |
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| 59 | /// atomic<bool>
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| 60 | // NB: No operators or fetch-operations for this type.
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| 61 | template<>
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| 62 | struct atomic<bool>
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| 63 | {
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| 64 | using value_type = bool;
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| 65 |
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| 66 | private:
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| 67 | __atomic_base<bool> _M_base;
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| 68 |
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| 69 | public:
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| 70 | atomic() noexcept = default;
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| 71 | ~atomic() noexcept = default;
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| 72 | atomic(const atomic&) = delete;
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| 73 | atomic& operator=(const atomic&) = delete;
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| 74 | atomic& operator=(const atomic&) volatile = delete;
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| 75 |
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| 76 | constexpr atomic(bool __i) noexcept : _M_base(__i) { }
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| 77 |
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| 78 | bool
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| 79 | operator=(bool __i) noexcept
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| 80 | { return _M_base.operator=(__i); }
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| 81 |
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| 82 | bool
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| 83 | operator=(bool __i) volatile noexcept
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| 84 | { return _M_base.operator=(__i); }
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| 85 |
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| 86 | operator bool() const noexcept
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| 87 | { return _M_base.load(); }
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| 88 |
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| 89 | operator bool() const volatile noexcept
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| 90 | { return _M_base.load(); }
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| 91 |
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| 92 | bool
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| 93 | is_lock_free() const noexcept { return _M_base.is_lock_free(); }
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| 94 |
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| 95 | bool
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| 96 | is_lock_free() const volatile noexcept { return _M_base.is_lock_free(); }
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| 97 |
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| 98 | #if __cplusplus >= 201703L
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| 99 | static constexpr bool is_always_lock_free = ATOMIC_BOOL_LOCK_FREE == 2;
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| 100 | #endif
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| 101 |
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| 102 | void
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| 103 | store(bool __i, memory_order __m = memory_order_seq_cst) noexcept
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| 104 | { _M_base.store(__i, __m); }
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| 105 |
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| 106 | void
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| 107 | store(bool __i, memory_order __m = memory_order_seq_cst) volatile noexcept
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| 108 | { _M_base.store(__i, __m); }
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| 109 |
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| 110 | bool
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| 111 | load(memory_order __m = memory_order_seq_cst) const noexcept
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| 112 | { return _M_base.load(__m); }
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| 113 |
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| 114 | bool
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| 115 | load(memory_order __m = memory_order_seq_cst) const volatile noexcept
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| 116 | { return _M_base.load(__m); }
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| 117 |
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| 118 | bool
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| 119 | exchange(bool __i, memory_order __m = memory_order_seq_cst) noexcept
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| 120 | { return _M_base.exchange(__i, __m); }
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| 121 |
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| 122 | bool
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| 123 | exchange(bool __i,
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| 124 | memory_order __m = memory_order_seq_cst) volatile noexcept
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| 125 | { return _M_base.exchange(__i, __m); }
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| 126 |
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| 127 | bool
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| 128 | compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1,
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| 129 | memory_order __m2) noexcept
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| 130 | { return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); }
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| 131 |
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| 132 | bool
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| 133 | compare_exchange_weak(bool& __i1, bool __i2, memory_order __m1,
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| 134 | memory_order __m2) volatile noexcept
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| 135 | { return _M_base.compare_exchange_weak(__i1, __i2, __m1, __m2); }
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| 136 |
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| 137 | bool
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| 138 | compare_exchange_weak(bool& __i1, bool __i2,
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| 139 | memory_order __m = memory_order_seq_cst) noexcept
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| 140 | { return _M_base.compare_exchange_weak(__i1, __i2, __m); }
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| 141 |
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| 142 | bool
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| 143 | compare_exchange_weak(bool& __i1, bool __i2,
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| 144 | memory_order __m = memory_order_seq_cst) volatile noexcept
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| 145 | { return _M_base.compare_exchange_weak(__i1, __i2, __m); }
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| 146 |
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| 147 | bool
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| 148 | compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1,
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| 149 | memory_order __m2) noexcept
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| 150 | { return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); }
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| 151 |
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| 152 | bool
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| 153 | compare_exchange_strong(bool& __i1, bool __i2, memory_order __m1,
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| 154 | memory_order __m2) volatile noexcept
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| 155 | { return _M_base.compare_exchange_strong(__i1, __i2, __m1, __m2); }
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| 156 |
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| 157 | bool
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| 158 | compare_exchange_strong(bool& __i1, bool __i2,
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| 159 | memory_order __m = memory_order_seq_cst) noexcept
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| 160 | { return _M_base.compare_exchange_strong(__i1, __i2, __m); }
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| 161 |
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| 162 | bool
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| 163 | compare_exchange_strong(bool& __i1, bool __i2,
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| 164 | memory_order __m = memory_order_seq_cst) volatile noexcept
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| 165 | { return _M_base.compare_exchange_strong(__i1, __i2, __m); }
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| 166 |
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| 167 | #if __cpp_lib_atomic_wait
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| 168 | void
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| 169 | wait(bool __old, memory_order __m = memory_order_seq_cst) const noexcept
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| 170 | { _M_base.wait(__old, __m); }
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| 171 |
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| 172 | // TODO add const volatile overload
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| 173 |
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| 174 | void
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| 175 | notify_one() const noexcept
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| 176 | { _M_base.notify_one(); }
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| 177 |
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| 178 | void
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| 179 | notify_all() const noexcept
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| 180 | { _M_base.notify_all(); }
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| 181 | #endif // __cpp_lib_atomic_wait
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| 182 | };
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| 183 |
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| 184 | #if __cplusplus <= 201703L
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| 185 | # define _GLIBCXX20_INIT(I)
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| 186 | #else
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| 187 | # define _GLIBCXX20_INIT(I) = I
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| 188 | #endif
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| 189 |
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| 190 | /**
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| 191 | * @brief Generic atomic type, primary class template.
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| 192 | *
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| 193 | * @tparam _Tp Type to be made atomic, must be trivially copyable.
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| 194 | */
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| 195 | template<typename _Tp>
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| 196 | struct atomic
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| 197 | {
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| 198 | using value_type = _Tp;
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| 199 |
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| 200 | private:
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| 201 | // Align 1/2/4/8/16-byte types to at least their size.
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| 202 | static constexpr int _S_min_alignment
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| 203 | = (sizeof(_Tp) & (sizeof(_Tp) - 1)) || sizeof(_Tp) > 16
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| 204 | ? 0 : sizeof(_Tp);
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| 205 |
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| 206 | static constexpr int _S_alignment
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| 207 | = _S_min_alignment > alignof(_Tp) ? _S_min_alignment : alignof(_Tp);
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| 208 |
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| 209 | alignas(_S_alignment) _Tp _M_i _GLIBCXX20_INIT(_Tp());
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| 210 |
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| 211 | static_assert(__is_trivially_copyable(_Tp),
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| 212 | "std::atomic requires a trivially copyable type");
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| 213 |
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| 214 | static_assert(sizeof(_Tp) > 0,
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| 215 | "Incomplete or zero-sized types are not supported");
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| 216 |
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| 217 | #if __cplusplus > 201703L
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| 218 | static_assert(is_copy_constructible_v<_Tp>);
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| 219 | static_assert(is_move_constructible_v<_Tp>);
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| 220 | static_assert(is_copy_assignable_v<_Tp>);
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| 221 | static_assert(is_move_assignable_v<_Tp>);
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| 222 | #endif
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| 223 |
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| 224 | public:
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| 225 | atomic() = default;
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| 226 | ~atomic() noexcept = default;
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| 227 | atomic(const atomic&) = delete;
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| 228 | atomic& operator=(const atomic&) = delete;
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| 229 | atomic& operator=(const atomic&) volatile = delete;
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| 230 |
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| 231 | constexpr atomic(_Tp __i) noexcept : _M_i(__i) { }
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| 232 |
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| 233 | operator _Tp() const noexcept
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| 234 | { return load(); }
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| 235 |
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| 236 | operator _Tp() const volatile noexcept
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| 237 | { return load(); }
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| 238 |
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| 239 | _Tp
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| 240 | operator=(_Tp __i) noexcept
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| 241 | { store(__i); return __i; }
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| 242 |
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| 243 | _Tp
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| 244 | operator=(_Tp __i) volatile noexcept
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| 245 | { store(__i); return __i; }
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| 246 |
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| 247 | bool
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| 248 | is_lock_free() const noexcept
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| 249 | {
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| 250 | // Produce a fake, minimally aligned pointer.
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| 251 | return __atomic_is_lock_free(sizeof(_M_i),
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| 252 | reinterpret_cast<void *>(-_S_alignment));
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| 253 | }
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| 254 |
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| 255 | bool
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| 256 | is_lock_free() const volatile noexcept
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| 257 | {
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| 258 | // Produce a fake, minimally aligned pointer.
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| 259 | return __atomic_is_lock_free(sizeof(_M_i),
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| 260 | reinterpret_cast<void *>(-_S_alignment));
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| 261 | }
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| 262 |
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| 263 | #if __cplusplus >= 201703L
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| 264 | static constexpr bool is_always_lock_free
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| 265 | = __atomic_always_lock_free(sizeof(_M_i), 0);
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| 266 | #endif
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| 267 |
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| 268 | void
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| 269 | store(_Tp __i, memory_order __m = memory_order_seq_cst) noexcept
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| 270 | {
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| 271 | __atomic_store(std::__addressof(_M_i), std::__addressof(__i), int(__m));
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| 272 | }
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| 273 |
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| 274 | void
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| 275 | store(_Tp __i, memory_order __m = memory_order_seq_cst) volatile noexcept
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| 276 | {
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| 277 | __atomic_store(std::__addressof(_M_i), std::__addressof(__i), int(__m));
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| 278 | }
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| 279 |
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| 280 | _Tp
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| 281 | load(memory_order __m = memory_order_seq_cst) const noexcept
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| 282 | {
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| 283 | alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
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| 284 | _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
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| 285 | __atomic_load(std::__addressof(_M_i), __ptr, int(__m));
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| 286 | return *__ptr;
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| 287 | }
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| 288 |
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| 289 | _Tp
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| 290 | load(memory_order __m = memory_order_seq_cst) const volatile noexcept
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| 291 | {
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| 292 | alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
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| 293 | _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
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| 294 | __atomic_load(std::__addressof(_M_i), __ptr, int(__m));
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| 295 | return *__ptr;
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| 296 | }
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| 297 |
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| 298 | _Tp
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| 299 | exchange(_Tp __i, memory_order __m = memory_order_seq_cst) noexcept
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| 300 | {
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| 301 | alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
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| 302 | _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
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| 303 | __atomic_exchange(std::__addressof(_M_i), std::__addressof(__i),
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| 304 | __ptr, int(__m));
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| 305 | return *__ptr;
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| 306 | }
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| 307 |
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| 308 | _Tp
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| 309 | exchange(_Tp __i,
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| 310 | memory_order __m = memory_order_seq_cst) volatile noexcept
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| 311 | {
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| 312 | alignas(_Tp) unsigned char __buf[sizeof(_Tp)];
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| 313 | _Tp* __ptr = reinterpret_cast<_Tp*>(__buf);
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| 314 | __atomic_exchange(std::__addressof(_M_i), std::__addressof(__i),
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| 315 | __ptr, int(__m));
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| 316 | return *__ptr;
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| 317 | }
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| 318 |
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| 319 | bool
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| 320 | compare_exchange_weak(_Tp& __e, _Tp __i, memory_order __s,
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| 321 | memory_order __f) noexcept
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| 322 | {
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| 323 | return __atomic_compare_exchange(std::__addressof(_M_i),
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| 324 | std::__addressof(__e),
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| 325 | std::__addressof(__i),
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| 326 | true, int(__s), int(__f));
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| 327 | }
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| 328 |
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| 329 | bool
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| 330 | compare_exchange_weak(_Tp& __e, _Tp __i, memory_order __s,
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| 331 | memory_order __f) volatile noexcept
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| 332 | {
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| 333 | return __atomic_compare_exchange(std::__addressof(_M_i),
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| 334 | std::__addressof(__e),
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| 335 | std::__addressof(__i),
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| 336 | true, int(__s), int(__f));
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| 337 | }
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| 338 |
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| 339 | bool
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| 340 | compare_exchange_weak(_Tp& __e, _Tp __i,
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| 341 | memory_order __m = memory_order_seq_cst) noexcept
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| 342 | { return compare_exchange_weak(__e, __i, __m,
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| 343 | __cmpexch_failure_order(__m)); }
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| 344 |
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| 345 | bool
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| 346 | compare_exchange_weak(_Tp& __e, _Tp __i,
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| 347 | memory_order __m = memory_order_seq_cst) volatile noexcept
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| 348 | { return compare_exchange_weak(__e, __i, __m,
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| 349 | __cmpexch_failure_order(__m)); }
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| 350 |
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| 351 | bool
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| 352 | compare_exchange_strong(_Tp& __e, _Tp __i, memory_order __s,
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| 353 | memory_order __f) noexcept
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| 354 | {
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| 355 | return __atomic_compare_exchange(std::__addressof(_M_i),
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| 356 | std::__addressof(__e),
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| 357 | std::__addressof(__i),
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| 358 | false, int(__s), int(__f));
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| 359 | }
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| 360 |
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| 361 | bool
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| 362 | compare_exchange_strong(_Tp& __e, _Tp __i, memory_order __s,
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| 363 | memory_order __f) volatile noexcept
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| 364 | {
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| 365 | return __atomic_compare_exchange(std::__addressof(_M_i),
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| 366 | std::__addressof(__e),
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| 367 | std::__addressof(__i),
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| 368 | false, int(__s), int(__f));
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| 369 | }
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| 370 |
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| 371 | bool
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| 372 | compare_exchange_strong(_Tp& __e, _Tp __i,
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| 373 | memory_order __m = memory_order_seq_cst) noexcept
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| 374 | { return compare_exchange_strong(__e, __i, __m,
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| 375 | __cmpexch_failure_order(__m)); }
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| 376 |
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| 377 | bool
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| 378 | compare_exchange_strong(_Tp& __e, _Tp __i,
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| 379 | memory_order __m = memory_order_seq_cst) volatile noexcept
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| 380 | { return compare_exchange_strong(__e, __i, __m,
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| 381 | __cmpexch_failure_order(__m)); }
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| 382 |
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| 383 | #if __cpp_lib_atomic_wait
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| 384 | void
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| 385 | wait(_Tp __old, memory_order __m = memory_order_seq_cst) const noexcept
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| 386 | {
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| 387 | std::__atomic_wait_address_v(&_M_i, __old,
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| 388 | [__m, this] { return this->load(__m); });
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| 389 | }
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| 390 |
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| 391 | // TODO add const volatile overload
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| 392 |
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| 393 | void
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| 394 | notify_one() const noexcept
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| 395 | { std::__atomic_notify_address(&_M_i, false); }
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| 396 |
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| 397 | void
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| 398 | notify_all() const noexcept
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| 399 | { std::__atomic_notify_address(&_M_i, true); }
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| 400 | #endif // __cpp_lib_atomic_wait
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| 401 |
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| 402 | };
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| 403 | #undef _GLIBCXX20_INIT
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| 404 |
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| 405 | /// Partial specialization for pointer types.
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| 406 | template<typename _Tp>
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| 407 | struct atomic<_Tp*>
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| 408 | {
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| 409 | using value_type = _Tp*;
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| 410 | using difference_type = ptrdiff_t;
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| 411 |
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| 412 | typedef _Tp* __pointer_type;
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| 413 | typedef __atomic_base<_Tp*> __base_type;
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| 414 | __base_type _M_b;
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| 415 |
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| 416 | atomic() noexcept = default;
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| 417 | ~atomic() noexcept = default;
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| 418 | atomic(const atomic&) = delete;
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| 419 | atomic& operator=(const atomic&) = delete;
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| 420 | atomic& operator=(const atomic&) volatile = delete;
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| 421 |
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| 422 | constexpr atomic(__pointer_type __p) noexcept : _M_b(__p) { }
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| 423 |
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| 424 | operator __pointer_type() const noexcept
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| 425 | { return __pointer_type(_M_b); }
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| 426 |
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| 427 | operator __pointer_type() const volatile noexcept
|
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| 428 | { return __pointer_type(_M_b); }
|
---|
| 429 |
|
---|
| 430 | __pointer_type
|
---|
| 431 | operator=(__pointer_type __p) noexcept
|
---|
| 432 | { return _M_b.operator=(__p); }
|
---|
| 433 |
|
---|
| 434 | __pointer_type
|
---|
| 435 | operator=(__pointer_type __p) volatile noexcept
|
---|
| 436 | { return _M_b.operator=(__p); }
|
---|
| 437 |
|
---|
| 438 | __pointer_type
|
---|
| 439 | operator++(int) noexcept
|
---|
| 440 | {
|
---|
| 441 | #if __cplusplus >= 201703L
|
---|
| 442 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 443 | #endif
|
---|
| 444 | return _M_b++;
|
---|
| 445 | }
|
---|
| 446 |
|
---|
| 447 | __pointer_type
|
---|
| 448 | operator++(int) volatile noexcept
|
---|
| 449 | {
|
---|
| 450 | #if __cplusplus >= 201703L
|
---|
| 451 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 452 | #endif
|
---|
| 453 | return _M_b++;
|
---|
| 454 | }
|
---|
| 455 |
|
---|
| 456 | __pointer_type
|
---|
| 457 | operator--(int) noexcept
|
---|
| 458 | {
|
---|
| 459 | #if __cplusplus >= 201703L
|
---|
| 460 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 461 | #endif
|
---|
| 462 | return _M_b--;
|
---|
| 463 | }
|
---|
| 464 |
|
---|
| 465 | __pointer_type
|
---|
| 466 | operator--(int) volatile noexcept
|
---|
| 467 | {
|
---|
| 468 | #if __cplusplus >= 201703L
|
---|
| 469 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 470 | #endif
|
---|
| 471 | return _M_b--;
|
---|
| 472 | }
|
---|
| 473 |
|
---|
| 474 | __pointer_type
|
---|
| 475 | operator++() noexcept
|
---|
| 476 | {
|
---|
| 477 | #if __cplusplus >= 201703L
|
---|
| 478 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 479 | #endif
|
---|
| 480 | return ++_M_b;
|
---|
| 481 | }
|
---|
| 482 |
|
---|
| 483 | __pointer_type
|
---|
| 484 | operator++() volatile noexcept
|
---|
| 485 | {
|
---|
| 486 | #if __cplusplus >= 201703L
|
---|
| 487 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 488 | #endif
|
---|
| 489 | return ++_M_b;
|
---|
| 490 | }
|
---|
| 491 |
|
---|
| 492 | __pointer_type
|
---|
| 493 | operator--() noexcept
|
---|
| 494 | {
|
---|
| 495 | #if __cplusplus >= 201703L
|
---|
| 496 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 497 | #endif
|
---|
| 498 | return --_M_b;
|
---|
| 499 | }
|
---|
| 500 |
|
---|
| 501 | __pointer_type
|
---|
| 502 | operator--() volatile noexcept
|
---|
| 503 | {
|
---|
| 504 | #if __cplusplus >= 201703L
|
---|
| 505 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 506 | #endif
|
---|
| 507 | return --_M_b;
|
---|
| 508 | }
|
---|
| 509 |
|
---|
| 510 | __pointer_type
|
---|
| 511 | operator+=(ptrdiff_t __d) noexcept
|
---|
| 512 | {
|
---|
| 513 | #if __cplusplus >= 201703L
|
---|
| 514 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 515 | #endif
|
---|
| 516 | return _M_b.operator+=(__d);
|
---|
| 517 | }
|
---|
| 518 |
|
---|
| 519 | __pointer_type
|
---|
| 520 | operator+=(ptrdiff_t __d) volatile noexcept
|
---|
| 521 | {
|
---|
| 522 | #if __cplusplus >= 201703L
|
---|
| 523 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 524 | #endif
|
---|
| 525 | return _M_b.operator+=(__d);
|
---|
| 526 | }
|
---|
| 527 |
|
---|
| 528 | __pointer_type
|
---|
| 529 | operator-=(ptrdiff_t __d) noexcept
|
---|
| 530 | {
|
---|
| 531 | #if __cplusplus >= 201703L
|
---|
| 532 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 533 | #endif
|
---|
| 534 | return _M_b.operator-=(__d);
|
---|
| 535 | }
|
---|
| 536 |
|
---|
| 537 | __pointer_type
|
---|
| 538 | operator-=(ptrdiff_t __d) volatile noexcept
|
---|
| 539 | {
|
---|
| 540 | #if __cplusplus >= 201703L
|
---|
| 541 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 542 | #endif
|
---|
| 543 | return _M_b.operator-=(__d);
|
---|
| 544 | }
|
---|
| 545 |
|
---|
| 546 | bool
|
---|
| 547 | is_lock_free() const noexcept
|
---|
| 548 | { return _M_b.is_lock_free(); }
|
---|
| 549 |
|
---|
| 550 | bool
|
---|
| 551 | is_lock_free() const volatile noexcept
|
---|
| 552 | { return _M_b.is_lock_free(); }
|
---|
| 553 |
|
---|
| 554 | #if __cplusplus >= 201703L
|
---|
| 555 | static constexpr bool is_always_lock_free = ATOMIC_POINTER_LOCK_FREE == 2;
|
---|
| 556 | #endif
|
---|
| 557 |
|
---|
| 558 | void
|
---|
| 559 | store(__pointer_type __p,
|
---|
| 560 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
| 561 | { return _M_b.store(__p, __m); }
|
---|
| 562 |
|
---|
| 563 | void
|
---|
| 564 | store(__pointer_type __p,
|
---|
| 565 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
| 566 | { return _M_b.store(__p, __m); }
|
---|
| 567 |
|
---|
| 568 | __pointer_type
|
---|
| 569 | load(memory_order __m = memory_order_seq_cst) const noexcept
|
---|
| 570 | { return _M_b.load(__m); }
|
---|
| 571 |
|
---|
| 572 | __pointer_type
|
---|
| 573 | load(memory_order __m = memory_order_seq_cst) const volatile noexcept
|
---|
| 574 | { return _M_b.load(__m); }
|
---|
| 575 |
|
---|
| 576 | __pointer_type
|
---|
| 577 | exchange(__pointer_type __p,
|
---|
| 578 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
| 579 | { return _M_b.exchange(__p, __m); }
|
---|
| 580 |
|
---|
| 581 | __pointer_type
|
---|
| 582 | exchange(__pointer_type __p,
|
---|
| 583 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
| 584 | { return _M_b.exchange(__p, __m); }
|
---|
| 585 |
|
---|
| 586 | bool
|
---|
| 587 | compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
|
---|
| 588 | memory_order __m1, memory_order __m2) noexcept
|
---|
| 589 | { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
|
---|
| 590 |
|
---|
| 591 | bool
|
---|
| 592 | compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
|
---|
| 593 | memory_order __m1,
|
---|
| 594 | memory_order __m2) volatile noexcept
|
---|
| 595 | { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
|
---|
| 596 |
|
---|
| 597 | bool
|
---|
| 598 | compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
|
---|
| 599 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
| 600 | {
|
---|
| 601 | return compare_exchange_weak(__p1, __p2, __m,
|
---|
| 602 | __cmpexch_failure_order(__m));
|
---|
| 603 | }
|
---|
| 604 |
|
---|
| 605 | bool
|
---|
| 606 | compare_exchange_weak(__pointer_type& __p1, __pointer_type __p2,
|
---|
| 607 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
| 608 | {
|
---|
| 609 | return compare_exchange_weak(__p1, __p2, __m,
|
---|
| 610 | __cmpexch_failure_order(__m));
|
---|
| 611 | }
|
---|
| 612 |
|
---|
| 613 | bool
|
---|
| 614 | compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
|
---|
| 615 | memory_order __m1, memory_order __m2) noexcept
|
---|
| 616 | { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
|
---|
| 617 |
|
---|
| 618 | bool
|
---|
| 619 | compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
|
---|
| 620 | memory_order __m1,
|
---|
| 621 | memory_order __m2) volatile noexcept
|
---|
| 622 | { return _M_b.compare_exchange_strong(__p1, __p2, __m1, __m2); }
|
---|
| 623 |
|
---|
| 624 | bool
|
---|
| 625 | compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
|
---|
| 626 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
| 627 | {
|
---|
| 628 | return _M_b.compare_exchange_strong(__p1, __p2, __m,
|
---|
| 629 | __cmpexch_failure_order(__m));
|
---|
| 630 | }
|
---|
| 631 |
|
---|
| 632 | bool
|
---|
| 633 | compare_exchange_strong(__pointer_type& __p1, __pointer_type __p2,
|
---|
| 634 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
| 635 | {
|
---|
| 636 | return _M_b.compare_exchange_strong(__p1, __p2, __m,
|
---|
| 637 | __cmpexch_failure_order(__m));
|
---|
| 638 | }
|
---|
| 639 |
|
---|
| 640 | #if __cpp_lib_atomic_wait
|
---|
| 641 | void
|
---|
| 642 | wait(__pointer_type __old, memory_order __m = memory_order_seq_cst) noexcept
|
---|
| 643 | { _M_b.wait(__old, __m); }
|
---|
| 644 |
|
---|
| 645 | // TODO add const volatile overload
|
---|
| 646 |
|
---|
| 647 | void
|
---|
| 648 | notify_one() const noexcept
|
---|
| 649 | { _M_b.notify_one(); }
|
---|
| 650 |
|
---|
| 651 | void
|
---|
| 652 | notify_all() const noexcept
|
---|
| 653 | { _M_b.notify_all(); }
|
---|
| 654 | #endif // __cpp_lib_atomic_wait
|
---|
| 655 | __pointer_type
|
---|
| 656 | fetch_add(ptrdiff_t __d,
|
---|
| 657 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
| 658 | {
|
---|
| 659 | #if __cplusplus >= 201703L
|
---|
| 660 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 661 | #endif
|
---|
| 662 | return _M_b.fetch_add(__d, __m);
|
---|
| 663 | }
|
---|
| 664 |
|
---|
| 665 | __pointer_type
|
---|
| 666 | fetch_add(ptrdiff_t __d,
|
---|
| 667 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
| 668 | {
|
---|
| 669 | #if __cplusplus >= 201703L
|
---|
| 670 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 671 | #endif
|
---|
| 672 | return _M_b.fetch_add(__d, __m);
|
---|
| 673 | }
|
---|
| 674 |
|
---|
| 675 | __pointer_type
|
---|
| 676 | fetch_sub(ptrdiff_t __d,
|
---|
| 677 | memory_order __m = memory_order_seq_cst) noexcept
|
---|
| 678 | {
|
---|
| 679 | #if __cplusplus >= 201703L
|
---|
| 680 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 681 | #endif
|
---|
| 682 | return _M_b.fetch_sub(__d, __m);
|
---|
| 683 | }
|
---|
| 684 |
|
---|
| 685 | __pointer_type
|
---|
| 686 | fetch_sub(ptrdiff_t __d,
|
---|
| 687 | memory_order __m = memory_order_seq_cst) volatile noexcept
|
---|
| 688 | {
|
---|
| 689 | #if __cplusplus >= 201703L
|
---|
| 690 | static_assert( is_object<_Tp>::value, "pointer to object type" );
|
---|
| 691 | #endif
|
---|
| 692 | return _M_b.fetch_sub(__d, __m);
|
---|
| 693 | }
|
---|
| 694 | };
|
---|
| 695 |
|
---|
| 696 |
|
---|
| 697 | /// Explicit specialization for char.
|
---|
| 698 | template<>
|
---|
| 699 | struct atomic<char> : __atomic_base<char>
|
---|
| 700 | {
|
---|
| 701 | typedef char __integral_type;
|
---|
| 702 | typedef __atomic_base<char> __base_type;
|
---|
| 703 |
|
---|
| 704 | atomic() noexcept = default;
|
---|
| 705 | ~atomic() noexcept = default;
|
---|
| 706 | atomic(const atomic&) = delete;
|
---|
| 707 | atomic& operator=(const atomic&) = delete;
|
---|
| 708 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 709 |
|
---|
| 710 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 711 |
|
---|
| 712 | using __base_type::operator __integral_type;
|
---|
| 713 | using __base_type::operator=;
|
---|
| 714 |
|
---|
| 715 | #if __cplusplus >= 201703L
|
---|
| 716 | static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2;
|
---|
| 717 | #endif
|
---|
| 718 | };
|
---|
| 719 |
|
---|
| 720 | /// Explicit specialization for signed char.
|
---|
| 721 | template<>
|
---|
| 722 | struct atomic<signed char> : __atomic_base<signed char>
|
---|
| 723 | {
|
---|
| 724 | typedef signed char __integral_type;
|
---|
| 725 | typedef __atomic_base<signed char> __base_type;
|
---|
| 726 |
|
---|
| 727 | atomic() noexcept= default;
|
---|
| 728 | ~atomic() noexcept = default;
|
---|
| 729 | atomic(const atomic&) = delete;
|
---|
| 730 | atomic& operator=(const atomic&) = delete;
|
---|
| 731 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 732 |
|
---|
| 733 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 734 |
|
---|
| 735 | using __base_type::operator __integral_type;
|
---|
| 736 | using __base_type::operator=;
|
---|
| 737 |
|
---|
| 738 | #if __cplusplus >= 201703L
|
---|
| 739 | static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2;
|
---|
| 740 | #endif
|
---|
| 741 | };
|
---|
| 742 |
|
---|
| 743 | /// Explicit specialization for unsigned char.
|
---|
| 744 | template<>
|
---|
| 745 | struct atomic<unsigned char> : __atomic_base<unsigned char>
|
---|
| 746 | {
|
---|
| 747 | typedef unsigned char __integral_type;
|
---|
| 748 | typedef __atomic_base<unsigned char> __base_type;
|
---|
| 749 |
|
---|
| 750 | atomic() noexcept= default;
|
---|
| 751 | ~atomic() noexcept = default;
|
---|
| 752 | atomic(const atomic&) = delete;
|
---|
| 753 | atomic& operator=(const atomic&) = delete;
|
---|
| 754 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 755 |
|
---|
| 756 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 757 |
|
---|
| 758 | using __base_type::operator __integral_type;
|
---|
| 759 | using __base_type::operator=;
|
---|
| 760 |
|
---|
| 761 | #if __cplusplus >= 201703L
|
---|
| 762 | static constexpr bool is_always_lock_free = ATOMIC_CHAR_LOCK_FREE == 2;
|
---|
| 763 | #endif
|
---|
| 764 | };
|
---|
| 765 |
|
---|
| 766 | /// Explicit specialization for short.
|
---|
| 767 | template<>
|
---|
| 768 | struct atomic<short> : __atomic_base<short>
|
---|
| 769 | {
|
---|
| 770 | typedef short __integral_type;
|
---|
| 771 | typedef __atomic_base<short> __base_type;
|
---|
| 772 |
|
---|
| 773 | atomic() noexcept = default;
|
---|
| 774 | ~atomic() noexcept = default;
|
---|
| 775 | atomic(const atomic&) = delete;
|
---|
| 776 | atomic& operator=(const atomic&) = delete;
|
---|
| 777 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 778 |
|
---|
| 779 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 780 |
|
---|
| 781 | using __base_type::operator __integral_type;
|
---|
| 782 | using __base_type::operator=;
|
---|
| 783 |
|
---|
| 784 | #if __cplusplus >= 201703L
|
---|
| 785 | static constexpr bool is_always_lock_free = ATOMIC_SHORT_LOCK_FREE == 2;
|
---|
| 786 | #endif
|
---|
| 787 | };
|
---|
| 788 |
|
---|
| 789 | /// Explicit specialization for unsigned short.
|
---|
| 790 | template<>
|
---|
| 791 | struct atomic<unsigned short> : __atomic_base<unsigned short>
|
---|
| 792 | {
|
---|
| 793 | typedef unsigned short __integral_type;
|
---|
| 794 | typedef __atomic_base<unsigned short> __base_type;
|
---|
| 795 |
|
---|
| 796 | atomic() noexcept = default;
|
---|
| 797 | ~atomic() noexcept = default;
|
---|
| 798 | atomic(const atomic&) = delete;
|
---|
| 799 | atomic& operator=(const atomic&) = delete;
|
---|
| 800 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 801 |
|
---|
| 802 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 803 |
|
---|
| 804 | using __base_type::operator __integral_type;
|
---|
| 805 | using __base_type::operator=;
|
---|
| 806 |
|
---|
| 807 | #if __cplusplus >= 201703L
|
---|
| 808 | static constexpr bool is_always_lock_free = ATOMIC_SHORT_LOCK_FREE == 2;
|
---|
| 809 | #endif
|
---|
| 810 | };
|
---|
| 811 |
|
---|
| 812 | /// Explicit specialization for int.
|
---|
| 813 | template<>
|
---|
| 814 | struct atomic<int> : __atomic_base<int>
|
---|
| 815 | {
|
---|
| 816 | typedef int __integral_type;
|
---|
| 817 | typedef __atomic_base<int> __base_type;
|
---|
| 818 |
|
---|
| 819 | atomic() noexcept = default;
|
---|
| 820 | ~atomic() noexcept = default;
|
---|
| 821 | atomic(const atomic&) = delete;
|
---|
| 822 | atomic& operator=(const atomic&) = delete;
|
---|
| 823 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 824 |
|
---|
| 825 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 826 |
|
---|
| 827 | using __base_type::operator __integral_type;
|
---|
| 828 | using __base_type::operator=;
|
---|
| 829 |
|
---|
| 830 | #if __cplusplus >= 201703L
|
---|
| 831 | static constexpr bool is_always_lock_free = ATOMIC_INT_LOCK_FREE == 2;
|
---|
| 832 | #endif
|
---|
| 833 | };
|
---|
| 834 |
|
---|
| 835 | /// Explicit specialization for unsigned int.
|
---|
| 836 | template<>
|
---|
| 837 | struct atomic<unsigned int> : __atomic_base<unsigned int>
|
---|
| 838 | {
|
---|
| 839 | typedef unsigned int __integral_type;
|
---|
| 840 | typedef __atomic_base<unsigned int> __base_type;
|
---|
| 841 |
|
---|
| 842 | atomic() noexcept = default;
|
---|
| 843 | ~atomic() noexcept = default;
|
---|
| 844 | atomic(const atomic&) = delete;
|
---|
| 845 | atomic& operator=(const atomic&) = delete;
|
---|
| 846 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 847 |
|
---|
| 848 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 849 |
|
---|
| 850 | using __base_type::operator __integral_type;
|
---|
| 851 | using __base_type::operator=;
|
---|
| 852 |
|
---|
| 853 | #if __cplusplus >= 201703L
|
---|
| 854 | static constexpr bool is_always_lock_free = ATOMIC_INT_LOCK_FREE == 2;
|
---|
| 855 | #endif
|
---|
| 856 | };
|
---|
| 857 |
|
---|
| 858 | /// Explicit specialization for long.
|
---|
| 859 | template<>
|
---|
| 860 | struct atomic<long> : __atomic_base<long>
|
---|
| 861 | {
|
---|
| 862 | typedef long __integral_type;
|
---|
| 863 | typedef __atomic_base<long> __base_type;
|
---|
| 864 |
|
---|
| 865 | atomic() noexcept = default;
|
---|
| 866 | ~atomic() noexcept = default;
|
---|
| 867 | atomic(const atomic&) = delete;
|
---|
| 868 | atomic& operator=(const atomic&) = delete;
|
---|
| 869 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 870 |
|
---|
| 871 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 872 |
|
---|
| 873 | using __base_type::operator __integral_type;
|
---|
| 874 | using __base_type::operator=;
|
---|
| 875 |
|
---|
| 876 | #if __cplusplus >= 201703L
|
---|
| 877 | static constexpr bool is_always_lock_free = ATOMIC_LONG_LOCK_FREE == 2;
|
---|
| 878 | #endif
|
---|
| 879 | };
|
---|
| 880 |
|
---|
| 881 | /// Explicit specialization for unsigned long.
|
---|
| 882 | template<>
|
---|
| 883 | struct atomic<unsigned long> : __atomic_base<unsigned long>
|
---|
| 884 | {
|
---|
| 885 | typedef unsigned long __integral_type;
|
---|
| 886 | typedef __atomic_base<unsigned long> __base_type;
|
---|
| 887 |
|
---|
| 888 | atomic() noexcept = default;
|
---|
| 889 | ~atomic() noexcept = default;
|
---|
| 890 | atomic(const atomic&) = delete;
|
---|
| 891 | atomic& operator=(const atomic&) = delete;
|
---|
| 892 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 893 |
|
---|
| 894 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 895 |
|
---|
| 896 | using __base_type::operator __integral_type;
|
---|
| 897 | using __base_type::operator=;
|
---|
| 898 |
|
---|
| 899 | #if __cplusplus >= 201703L
|
---|
| 900 | static constexpr bool is_always_lock_free = ATOMIC_LONG_LOCK_FREE == 2;
|
---|
| 901 | #endif
|
---|
| 902 | };
|
---|
| 903 |
|
---|
| 904 | /// Explicit specialization for long long.
|
---|
| 905 | template<>
|
---|
| 906 | struct atomic<long long> : __atomic_base<long long>
|
---|
| 907 | {
|
---|
| 908 | typedef long long __integral_type;
|
---|
| 909 | typedef __atomic_base<long long> __base_type;
|
---|
| 910 |
|
---|
| 911 | atomic() noexcept = default;
|
---|
| 912 | ~atomic() noexcept = default;
|
---|
| 913 | atomic(const atomic&) = delete;
|
---|
| 914 | atomic& operator=(const atomic&) = delete;
|
---|
| 915 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 916 |
|
---|
| 917 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 918 |
|
---|
| 919 | using __base_type::operator __integral_type;
|
---|
| 920 | using __base_type::operator=;
|
---|
| 921 |
|
---|
| 922 | #if __cplusplus >= 201703L
|
---|
| 923 | static constexpr bool is_always_lock_free = ATOMIC_LLONG_LOCK_FREE == 2;
|
---|
| 924 | #endif
|
---|
| 925 | };
|
---|
| 926 |
|
---|
| 927 | /// Explicit specialization for unsigned long long.
|
---|
| 928 | template<>
|
---|
| 929 | struct atomic<unsigned long long> : __atomic_base<unsigned long long>
|
---|
| 930 | {
|
---|
| 931 | typedef unsigned long long __integral_type;
|
---|
| 932 | typedef __atomic_base<unsigned long long> __base_type;
|
---|
| 933 |
|
---|
| 934 | atomic() noexcept = default;
|
---|
| 935 | ~atomic() noexcept = default;
|
---|
| 936 | atomic(const atomic&) = delete;
|
---|
| 937 | atomic& operator=(const atomic&) = delete;
|
---|
| 938 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 939 |
|
---|
| 940 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 941 |
|
---|
| 942 | using __base_type::operator __integral_type;
|
---|
| 943 | using __base_type::operator=;
|
---|
| 944 |
|
---|
| 945 | #if __cplusplus >= 201703L
|
---|
| 946 | static constexpr bool is_always_lock_free = ATOMIC_LLONG_LOCK_FREE == 2;
|
---|
| 947 | #endif
|
---|
| 948 | };
|
---|
| 949 |
|
---|
| 950 | /// Explicit specialization for wchar_t.
|
---|
| 951 | template<>
|
---|
| 952 | struct atomic<wchar_t> : __atomic_base<wchar_t>
|
---|
| 953 | {
|
---|
| 954 | typedef wchar_t __integral_type;
|
---|
| 955 | typedef __atomic_base<wchar_t> __base_type;
|
---|
| 956 |
|
---|
| 957 | atomic() noexcept = default;
|
---|
| 958 | ~atomic() noexcept = default;
|
---|
| 959 | atomic(const atomic&) = delete;
|
---|
| 960 | atomic& operator=(const atomic&) = delete;
|
---|
| 961 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 962 |
|
---|
| 963 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 964 |
|
---|
| 965 | using __base_type::operator __integral_type;
|
---|
| 966 | using __base_type::operator=;
|
---|
| 967 |
|
---|
| 968 | #if __cplusplus >= 201703L
|
---|
| 969 | static constexpr bool is_always_lock_free = ATOMIC_WCHAR_T_LOCK_FREE == 2;
|
---|
| 970 | #endif
|
---|
| 971 | };
|
---|
| 972 |
|
---|
| 973 | #ifdef _GLIBCXX_USE_CHAR8_T
|
---|
| 974 | /// Explicit specialization for char8_t.
|
---|
| 975 | template<>
|
---|
| 976 | struct atomic<char8_t> : __atomic_base<char8_t>
|
---|
| 977 | {
|
---|
| 978 | typedef char8_t __integral_type;
|
---|
| 979 | typedef __atomic_base<char8_t> __base_type;
|
---|
| 980 |
|
---|
| 981 | atomic() noexcept = default;
|
---|
| 982 | ~atomic() noexcept = default;
|
---|
| 983 | atomic(const atomic&) = delete;
|
---|
| 984 | atomic& operator=(const atomic&) = delete;
|
---|
| 985 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 986 |
|
---|
| 987 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 988 |
|
---|
| 989 | using __base_type::operator __integral_type;
|
---|
| 990 | using __base_type::operator=;
|
---|
| 991 |
|
---|
| 992 | #if __cplusplus > 201402L
|
---|
| 993 | static constexpr bool is_always_lock_free = ATOMIC_CHAR8_T_LOCK_FREE == 2;
|
---|
| 994 | #endif
|
---|
| 995 | };
|
---|
| 996 | #endif
|
---|
| 997 |
|
---|
| 998 | /// Explicit specialization for char16_t.
|
---|
| 999 | template<>
|
---|
| 1000 | struct atomic<char16_t> : __atomic_base<char16_t>
|
---|
| 1001 | {
|
---|
| 1002 | typedef char16_t __integral_type;
|
---|
| 1003 | typedef __atomic_base<char16_t> __base_type;
|
---|
| 1004 |
|
---|
| 1005 | atomic() noexcept = default;
|
---|
| 1006 | ~atomic() noexcept = default;
|
---|
| 1007 | atomic(const atomic&) = delete;
|
---|
| 1008 | atomic& operator=(const atomic&) = delete;
|
---|
| 1009 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 1010 |
|
---|
| 1011 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 1012 |
|
---|
| 1013 | using __base_type::operator __integral_type;
|
---|
| 1014 | using __base_type::operator=;
|
---|
| 1015 |
|
---|
| 1016 | #if __cplusplus >= 201703L
|
---|
| 1017 | static constexpr bool is_always_lock_free = ATOMIC_CHAR16_T_LOCK_FREE == 2;
|
---|
| 1018 | #endif
|
---|
| 1019 | };
|
---|
| 1020 |
|
---|
| 1021 | /// Explicit specialization for char32_t.
|
---|
| 1022 | template<>
|
---|
| 1023 | struct atomic<char32_t> : __atomic_base<char32_t>
|
---|
| 1024 | {
|
---|
| 1025 | typedef char32_t __integral_type;
|
---|
| 1026 | typedef __atomic_base<char32_t> __base_type;
|
---|
| 1027 |
|
---|
| 1028 | atomic() noexcept = default;
|
---|
| 1029 | ~atomic() noexcept = default;
|
---|
| 1030 | atomic(const atomic&) = delete;
|
---|
| 1031 | atomic& operator=(const atomic&) = delete;
|
---|
| 1032 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 1033 |
|
---|
| 1034 | constexpr atomic(__integral_type __i) noexcept : __base_type(__i) { }
|
---|
| 1035 |
|
---|
| 1036 | using __base_type::operator __integral_type;
|
---|
| 1037 | using __base_type::operator=;
|
---|
| 1038 |
|
---|
| 1039 | #if __cplusplus >= 201703L
|
---|
| 1040 | static constexpr bool is_always_lock_free = ATOMIC_CHAR32_T_LOCK_FREE == 2;
|
---|
| 1041 | #endif
|
---|
| 1042 | };
|
---|
| 1043 |
|
---|
| 1044 |
|
---|
| 1045 | /// atomic_bool
|
---|
| 1046 | typedef atomic<bool> atomic_bool;
|
---|
| 1047 |
|
---|
| 1048 | /// atomic_char
|
---|
| 1049 | typedef atomic<char> atomic_char;
|
---|
| 1050 |
|
---|
| 1051 | /// atomic_schar
|
---|
| 1052 | typedef atomic<signed char> atomic_schar;
|
---|
| 1053 |
|
---|
| 1054 | /// atomic_uchar
|
---|
| 1055 | typedef atomic<unsigned char> atomic_uchar;
|
---|
| 1056 |
|
---|
| 1057 | /// atomic_short
|
---|
| 1058 | typedef atomic<short> atomic_short;
|
---|
| 1059 |
|
---|
| 1060 | /// atomic_ushort
|
---|
| 1061 | typedef atomic<unsigned short> atomic_ushort;
|
---|
| 1062 |
|
---|
| 1063 | /// atomic_int
|
---|
| 1064 | typedef atomic<int> atomic_int;
|
---|
| 1065 |
|
---|
| 1066 | /// atomic_uint
|
---|
| 1067 | typedef atomic<unsigned int> atomic_uint;
|
---|
| 1068 |
|
---|
| 1069 | /// atomic_long
|
---|
| 1070 | typedef atomic<long> atomic_long;
|
---|
| 1071 |
|
---|
| 1072 | /// atomic_ulong
|
---|
| 1073 | typedef atomic<unsigned long> atomic_ulong;
|
---|
| 1074 |
|
---|
| 1075 | /// atomic_llong
|
---|
| 1076 | typedef atomic<long long> atomic_llong;
|
---|
| 1077 |
|
---|
| 1078 | /// atomic_ullong
|
---|
| 1079 | typedef atomic<unsigned long long> atomic_ullong;
|
---|
| 1080 |
|
---|
| 1081 | /// atomic_wchar_t
|
---|
| 1082 | typedef atomic<wchar_t> atomic_wchar_t;
|
---|
| 1083 |
|
---|
| 1084 | #ifdef _GLIBCXX_USE_CHAR8_T
|
---|
| 1085 | /// atomic_char8_t
|
---|
| 1086 | typedef atomic<char8_t> atomic_char8_t;
|
---|
| 1087 | #endif
|
---|
| 1088 |
|
---|
| 1089 | /// atomic_char16_t
|
---|
| 1090 | typedef atomic<char16_t> atomic_char16_t;
|
---|
| 1091 |
|
---|
| 1092 | /// atomic_char32_t
|
---|
| 1093 | typedef atomic<char32_t> atomic_char32_t;
|
---|
| 1094 |
|
---|
| 1095 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1
|
---|
| 1096 | // _GLIBCXX_RESOLVE_LIB_DEFECTS
|
---|
| 1097 | // 2441. Exact-width atomic typedefs should be provided
|
---|
| 1098 |
|
---|
| 1099 | /// atomic_int8_t
|
---|
| 1100 | typedef atomic<int8_t> atomic_int8_t;
|
---|
| 1101 |
|
---|
| 1102 | /// atomic_uint8_t
|
---|
| 1103 | typedef atomic<uint8_t> atomic_uint8_t;
|
---|
| 1104 |
|
---|
| 1105 | /// atomic_int16_t
|
---|
| 1106 | typedef atomic<int16_t> atomic_int16_t;
|
---|
| 1107 |
|
---|
| 1108 | /// atomic_uint16_t
|
---|
| 1109 | typedef atomic<uint16_t> atomic_uint16_t;
|
---|
| 1110 |
|
---|
| 1111 | /// atomic_int32_t
|
---|
| 1112 | typedef atomic<int32_t> atomic_int32_t;
|
---|
| 1113 |
|
---|
| 1114 | /// atomic_uint32_t
|
---|
| 1115 | typedef atomic<uint32_t> atomic_uint32_t;
|
---|
| 1116 |
|
---|
| 1117 | /// atomic_int64_t
|
---|
| 1118 | typedef atomic<int64_t> atomic_int64_t;
|
---|
| 1119 |
|
---|
| 1120 | /// atomic_uint64_t
|
---|
| 1121 | typedef atomic<uint64_t> atomic_uint64_t;
|
---|
| 1122 |
|
---|
| 1123 |
|
---|
| 1124 | /// atomic_int_least8_t
|
---|
| 1125 | typedef atomic<int_least8_t> atomic_int_least8_t;
|
---|
| 1126 |
|
---|
| 1127 | /// atomic_uint_least8_t
|
---|
| 1128 | typedef atomic<uint_least8_t> atomic_uint_least8_t;
|
---|
| 1129 |
|
---|
| 1130 | /// atomic_int_least16_t
|
---|
| 1131 | typedef atomic<int_least16_t> atomic_int_least16_t;
|
---|
| 1132 |
|
---|
| 1133 | /// atomic_uint_least16_t
|
---|
| 1134 | typedef atomic<uint_least16_t> atomic_uint_least16_t;
|
---|
| 1135 |
|
---|
| 1136 | /// atomic_int_least32_t
|
---|
| 1137 | typedef atomic<int_least32_t> atomic_int_least32_t;
|
---|
| 1138 |
|
---|
| 1139 | /// atomic_uint_least32_t
|
---|
| 1140 | typedef atomic<uint_least32_t> atomic_uint_least32_t;
|
---|
| 1141 |
|
---|
| 1142 | /// atomic_int_least64_t
|
---|
| 1143 | typedef atomic<int_least64_t> atomic_int_least64_t;
|
---|
| 1144 |
|
---|
| 1145 | /// atomic_uint_least64_t
|
---|
| 1146 | typedef atomic<uint_least64_t> atomic_uint_least64_t;
|
---|
| 1147 |
|
---|
| 1148 |
|
---|
| 1149 | /// atomic_int_fast8_t
|
---|
| 1150 | typedef atomic<int_fast8_t> atomic_int_fast8_t;
|
---|
| 1151 |
|
---|
| 1152 | /// atomic_uint_fast8_t
|
---|
| 1153 | typedef atomic<uint_fast8_t> atomic_uint_fast8_t;
|
---|
| 1154 |
|
---|
| 1155 | /// atomic_int_fast16_t
|
---|
| 1156 | typedef atomic<int_fast16_t> atomic_int_fast16_t;
|
---|
| 1157 |
|
---|
| 1158 | /// atomic_uint_fast16_t
|
---|
| 1159 | typedef atomic<uint_fast16_t> atomic_uint_fast16_t;
|
---|
| 1160 |
|
---|
| 1161 | /// atomic_int_fast32_t
|
---|
| 1162 | typedef atomic<int_fast32_t> atomic_int_fast32_t;
|
---|
| 1163 |
|
---|
| 1164 | /// atomic_uint_fast32_t
|
---|
| 1165 | typedef atomic<uint_fast32_t> atomic_uint_fast32_t;
|
---|
| 1166 |
|
---|
| 1167 | /// atomic_int_fast64_t
|
---|
| 1168 | typedef atomic<int_fast64_t> atomic_int_fast64_t;
|
---|
| 1169 |
|
---|
| 1170 | /// atomic_uint_fast64_t
|
---|
| 1171 | typedef atomic<uint_fast64_t> atomic_uint_fast64_t;
|
---|
| 1172 | #endif
|
---|
| 1173 |
|
---|
| 1174 |
|
---|
| 1175 | /// atomic_intptr_t
|
---|
| 1176 | typedef atomic<intptr_t> atomic_intptr_t;
|
---|
| 1177 |
|
---|
| 1178 | /// atomic_uintptr_t
|
---|
| 1179 | typedef atomic<uintptr_t> atomic_uintptr_t;
|
---|
| 1180 |
|
---|
| 1181 | /// atomic_size_t
|
---|
| 1182 | typedef atomic<size_t> atomic_size_t;
|
---|
| 1183 |
|
---|
| 1184 | /// atomic_ptrdiff_t
|
---|
| 1185 | typedef atomic<ptrdiff_t> atomic_ptrdiff_t;
|
---|
| 1186 |
|
---|
| 1187 | #ifdef _GLIBCXX_USE_C99_STDINT_TR1
|
---|
| 1188 | /// atomic_intmax_t
|
---|
| 1189 | typedef atomic<intmax_t> atomic_intmax_t;
|
---|
| 1190 |
|
---|
| 1191 | /// atomic_uintmax_t
|
---|
| 1192 | typedef atomic<uintmax_t> atomic_uintmax_t;
|
---|
| 1193 | #endif
|
---|
| 1194 |
|
---|
| 1195 | // Function definitions, atomic_flag operations.
|
---|
| 1196 | inline bool
|
---|
| 1197 | atomic_flag_test_and_set_explicit(atomic_flag* __a,
|
---|
| 1198 | memory_order __m) noexcept
|
---|
| 1199 | { return __a->test_and_set(__m); }
|
---|
| 1200 |
|
---|
| 1201 | inline bool
|
---|
| 1202 | atomic_flag_test_and_set_explicit(volatile atomic_flag* __a,
|
---|
| 1203 | memory_order __m) noexcept
|
---|
| 1204 | { return __a->test_and_set(__m); }
|
---|
| 1205 |
|
---|
| 1206 | inline void
|
---|
| 1207 | atomic_flag_clear_explicit(atomic_flag* __a, memory_order __m) noexcept
|
---|
| 1208 | { __a->clear(__m); }
|
---|
| 1209 |
|
---|
| 1210 | inline void
|
---|
| 1211 | atomic_flag_clear_explicit(volatile atomic_flag* __a,
|
---|
| 1212 | memory_order __m) noexcept
|
---|
| 1213 | { __a->clear(__m); }
|
---|
| 1214 |
|
---|
| 1215 | inline bool
|
---|
| 1216 | atomic_flag_test_and_set(atomic_flag* __a) noexcept
|
---|
| 1217 | { return atomic_flag_test_and_set_explicit(__a, memory_order_seq_cst); }
|
---|
| 1218 |
|
---|
| 1219 | inline bool
|
---|
| 1220 | atomic_flag_test_and_set(volatile atomic_flag* __a) noexcept
|
---|
| 1221 | { return atomic_flag_test_and_set_explicit(__a, memory_order_seq_cst); }
|
---|
| 1222 |
|
---|
| 1223 | inline void
|
---|
| 1224 | atomic_flag_clear(atomic_flag* __a) noexcept
|
---|
| 1225 | { atomic_flag_clear_explicit(__a, memory_order_seq_cst); }
|
---|
| 1226 |
|
---|
| 1227 | inline void
|
---|
| 1228 | atomic_flag_clear(volatile atomic_flag* __a) noexcept
|
---|
| 1229 | { atomic_flag_clear_explicit(__a, memory_order_seq_cst); }
|
---|
| 1230 |
|
---|
| 1231 |
|
---|
| 1232 | template<typename _Tp>
|
---|
| 1233 | using __atomic_val_t = typename atomic<_Tp>::value_type;
|
---|
| 1234 | template<typename _Tp>
|
---|
| 1235 | using __atomic_diff_t = typename atomic<_Tp>::difference_type;
|
---|
| 1236 |
|
---|
| 1237 | // [atomics.nonmembers] Non-member functions.
|
---|
| 1238 | // Function templates generally applicable to atomic types.
|
---|
| 1239 | template<typename _ITp>
|
---|
| 1240 | inline bool
|
---|
| 1241 | atomic_is_lock_free(const atomic<_ITp>* __a) noexcept
|
---|
| 1242 | { return __a->is_lock_free(); }
|
---|
| 1243 |
|
---|
| 1244 | template<typename _ITp>
|
---|
| 1245 | inline bool
|
---|
| 1246 | atomic_is_lock_free(const volatile atomic<_ITp>* __a) noexcept
|
---|
| 1247 | { return __a->is_lock_free(); }
|
---|
| 1248 |
|
---|
| 1249 | template<typename _ITp>
|
---|
| 1250 | inline void
|
---|
| 1251 | atomic_init(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1252 | { __a->store(__i, memory_order_relaxed); }
|
---|
| 1253 |
|
---|
| 1254 | template<typename _ITp>
|
---|
| 1255 | inline void
|
---|
| 1256 | atomic_init(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1257 | { __a->store(__i, memory_order_relaxed); }
|
---|
| 1258 |
|
---|
| 1259 | template<typename _ITp>
|
---|
| 1260 | inline void
|
---|
| 1261 | atomic_store_explicit(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i,
|
---|
| 1262 | memory_order __m) noexcept
|
---|
| 1263 | { __a->store(__i, __m); }
|
---|
| 1264 |
|
---|
| 1265 | template<typename _ITp>
|
---|
| 1266 | inline void
|
---|
| 1267 | atomic_store_explicit(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i,
|
---|
| 1268 | memory_order __m) noexcept
|
---|
| 1269 | { __a->store(__i, __m); }
|
---|
| 1270 |
|
---|
| 1271 | template<typename _ITp>
|
---|
| 1272 | inline _ITp
|
---|
| 1273 | atomic_load_explicit(const atomic<_ITp>* __a, memory_order __m) noexcept
|
---|
| 1274 | { return __a->load(__m); }
|
---|
| 1275 |
|
---|
| 1276 | template<typename _ITp>
|
---|
| 1277 | inline _ITp
|
---|
| 1278 | atomic_load_explicit(const volatile atomic<_ITp>* __a,
|
---|
| 1279 | memory_order __m) noexcept
|
---|
| 1280 | { return __a->load(__m); }
|
---|
| 1281 |
|
---|
| 1282 | template<typename _ITp>
|
---|
| 1283 | inline _ITp
|
---|
| 1284 | atomic_exchange_explicit(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i,
|
---|
| 1285 | memory_order __m) noexcept
|
---|
| 1286 | { return __a->exchange(__i, __m); }
|
---|
| 1287 |
|
---|
| 1288 | template<typename _ITp>
|
---|
| 1289 | inline _ITp
|
---|
| 1290 | atomic_exchange_explicit(volatile atomic<_ITp>* __a,
|
---|
| 1291 | __atomic_val_t<_ITp> __i,
|
---|
| 1292 | memory_order __m) noexcept
|
---|
| 1293 | { return __a->exchange(__i, __m); }
|
---|
| 1294 |
|
---|
| 1295 | template<typename _ITp>
|
---|
| 1296 | inline bool
|
---|
| 1297 | atomic_compare_exchange_weak_explicit(atomic<_ITp>* __a,
|
---|
| 1298 | __atomic_val_t<_ITp>* __i1,
|
---|
| 1299 | __atomic_val_t<_ITp> __i2,
|
---|
| 1300 | memory_order __m1,
|
---|
| 1301 | memory_order __m2) noexcept
|
---|
| 1302 | { return __a->compare_exchange_weak(*__i1, __i2, __m1, __m2); }
|
---|
| 1303 |
|
---|
| 1304 | template<typename _ITp>
|
---|
| 1305 | inline bool
|
---|
| 1306 | atomic_compare_exchange_weak_explicit(volatile atomic<_ITp>* __a,
|
---|
| 1307 | __atomic_val_t<_ITp>* __i1,
|
---|
| 1308 | __atomic_val_t<_ITp> __i2,
|
---|
| 1309 | memory_order __m1,
|
---|
| 1310 | memory_order __m2) noexcept
|
---|
| 1311 | { return __a->compare_exchange_weak(*__i1, __i2, __m1, __m2); }
|
---|
| 1312 |
|
---|
| 1313 | template<typename _ITp>
|
---|
| 1314 | inline bool
|
---|
| 1315 | atomic_compare_exchange_strong_explicit(atomic<_ITp>* __a,
|
---|
| 1316 | __atomic_val_t<_ITp>* __i1,
|
---|
| 1317 | __atomic_val_t<_ITp> __i2,
|
---|
| 1318 | memory_order __m1,
|
---|
| 1319 | memory_order __m2) noexcept
|
---|
| 1320 | { return __a->compare_exchange_strong(*__i1, __i2, __m1, __m2); }
|
---|
| 1321 |
|
---|
| 1322 | template<typename _ITp>
|
---|
| 1323 | inline bool
|
---|
| 1324 | atomic_compare_exchange_strong_explicit(volatile atomic<_ITp>* __a,
|
---|
| 1325 | __atomic_val_t<_ITp>* __i1,
|
---|
| 1326 | __atomic_val_t<_ITp> __i2,
|
---|
| 1327 | memory_order __m1,
|
---|
| 1328 | memory_order __m2) noexcept
|
---|
| 1329 | { return __a->compare_exchange_strong(*__i1, __i2, __m1, __m2); }
|
---|
| 1330 |
|
---|
| 1331 |
|
---|
| 1332 | template<typename _ITp>
|
---|
| 1333 | inline void
|
---|
| 1334 | atomic_store(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1335 | { atomic_store_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1336 |
|
---|
| 1337 | template<typename _ITp>
|
---|
| 1338 | inline void
|
---|
| 1339 | atomic_store(volatile atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1340 | { atomic_store_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1341 |
|
---|
| 1342 | template<typename _ITp>
|
---|
| 1343 | inline _ITp
|
---|
| 1344 | atomic_load(const atomic<_ITp>* __a) noexcept
|
---|
| 1345 | { return atomic_load_explicit(__a, memory_order_seq_cst); }
|
---|
| 1346 |
|
---|
| 1347 | template<typename _ITp>
|
---|
| 1348 | inline _ITp
|
---|
| 1349 | atomic_load(const volatile atomic<_ITp>* __a) noexcept
|
---|
| 1350 | { return atomic_load_explicit(__a, memory_order_seq_cst); }
|
---|
| 1351 |
|
---|
| 1352 | template<typename _ITp>
|
---|
| 1353 | inline _ITp
|
---|
| 1354 | atomic_exchange(atomic<_ITp>* __a, __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1355 | { return atomic_exchange_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1356 |
|
---|
| 1357 | template<typename _ITp>
|
---|
| 1358 | inline _ITp
|
---|
| 1359 | atomic_exchange(volatile atomic<_ITp>* __a,
|
---|
| 1360 | __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1361 | { return atomic_exchange_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1362 |
|
---|
| 1363 | template<typename _ITp>
|
---|
| 1364 | inline bool
|
---|
| 1365 | atomic_compare_exchange_weak(atomic<_ITp>* __a,
|
---|
| 1366 | __atomic_val_t<_ITp>* __i1,
|
---|
| 1367 | __atomic_val_t<_ITp> __i2) noexcept
|
---|
| 1368 | {
|
---|
| 1369 | return atomic_compare_exchange_weak_explicit(__a, __i1, __i2,
|
---|
| 1370 | memory_order_seq_cst,
|
---|
| 1371 | memory_order_seq_cst);
|
---|
| 1372 | }
|
---|
| 1373 |
|
---|
| 1374 | template<typename _ITp>
|
---|
| 1375 | inline bool
|
---|
| 1376 | atomic_compare_exchange_weak(volatile atomic<_ITp>* __a,
|
---|
| 1377 | __atomic_val_t<_ITp>* __i1,
|
---|
| 1378 | __atomic_val_t<_ITp> __i2) noexcept
|
---|
| 1379 | {
|
---|
| 1380 | return atomic_compare_exchange_weak_explicit(__a, __i1, __i2,
|
---|
| 1381 | memory_order_seq_cst,
|
---|
| 1382 | memory_order_seq_cst);
|
---|
| 1383 | }
|
---|
| 1384 |
|
---|
| 1385 | template<typename _ITp>
|
---|
| 1386 | inline bool
|
---|
| 1387 | atomic_compare_exchange_strong(atomic<_ITp>* __a,
|
---|
| 1388 | __atomic_val_t<_ITp>* __i1,
|
---|
| 1389 | __atomic_val_t<_ITp> __i2) noexcept
|
---|
| 1390 | {
|
---|
| 1391 | return atomic_compare_exchange_strong_explicit(__a, __i1, __i2,
|
---|
| 1392 | memory_order_seq_cst,
|
---|
| 1393 | memory_order_seq_cst);
|
---|
| 1394 | }
|
---|
| 1395 |
|
---|
| 1396 | template<typename _ITp>
|
---|
| 1397 | inline bool
|
---|
| 1398 | atomic_compare_exchange_strong(volatile atomic<_ITp>* __a,
|
---|
| 1399 | __atomic_val_t<_ITp>* __i1,
|
---|
| 1400 | __atomic_val_t<_ITp> __i2) noexcept
|
---|
| 1401 | {
|
---|
| 1402 | return atomic_compare_exchange_strong_explicit(__a, __i1, __i2,
|
---|
| 1403 | memory_order_seq_cst,
|
---|
| 1404 | memory_order_seq_cst);
|
---|
| 1405 | }
|
---|
| 1406 |
|
---|
| 1407 |
|
---|
| 1408 | #if __cpp_lib_atomic_wait
|
---|
| 1409 | template<typename _Tp>
|
---|
| 1410 | inline void
|
---|
| 1411 | atomic_wait(const atomic<_Tp>* __a,
|
---|
| 1412 | typename std::atomic<_Tp>::value_type __old) noexcept
|
---|
| 1413 | { __a->wait(__old); }
|
---|
| 1414 |
|
---|
| 1415 | template<typename _Tp>
|
---|
| 1416 | inline void
|
---|
| 1417 | atomic_wait_explicit(const atomic<_Tp>* __a,
|
---|
| 1418 | typename std::atomic<_Tp>::value_type __old,
|
---|
| 1419 | std::memory_order __m) noexcept
|
---|
| 1420 | { __a->wait(__old, __m); }
|
---|
| 1421 |
|
---|
| 1422 | template<typename _Tp>
|
---|
| 1423 | inline void
|
---|
| 1424 | atomic_notify_one(atomic<_Tp>* __a) noexcept
|
---|
| 1425 | { __a->notify_one(); }
|
---|
| 1426 |
|
---|
| 1427 | template<typename _Tp>
|
---|
| 1428 | inline void
|
---|
| 1429 | atomic_notify_all(atomic<_Tp>* __a) noexcept
|
---|
| 1430 | { __a->notify_all(); }
|
---|
| 1431 | #endif // __cpp_lib_atomic_wait
|
---|
| 1432 |
|
---|
| 1433 | // Function templates for atomic_integral and atomic_pointer operations only.
|
---|
| 1434 | // Some operations (and, or, xor) are only available for atomic integrals,
|
---|
| 1435 | // which is implemented by taking a parameter of type __atomic_base<_ITp>*.
|
---|
| 1436 |
|
---|
| 1437 | template<typename _ITp>
|
---|
| 1438 | inline _ITp
|
---|
| 1439 | atomic_fetch_add_explicit(atomic<_ITp>* __a,
|
---|
| 1440 | __atomic_diff_t<_ITp> __i,
|
---|
| 1441 | memory_order __m) noexcept
|
---|
| 1442 | { return __a->fetch_add(__i, __m); }
|
---|
| 1443 |
|
---|
| 1444 | template<typename _ITp>
|
---|
| 1445 | inline _ITp
|
---|
| 1446 | atomic_fetch_add_explicit(volatile atomic<_ITp>* __a,
|
---|
| 1447 | __atomic_diff_t<_ITp> __i,
|
---|
| 1448 | memory_order __m) noexcept
|
---|
| 1449 | { return __a->fetch_add(__i, __m); }
|
---|
| 1450 |
|
---|
| 1451 | template<typename _ITp>
|
---|
| 1452 | inline _ITp
|
---|
| 1453 | atomic_fetch_sub_explicit(atomic<_ITp>* __a,
|
---|
| 1454 | __atomic_diff_t<_ITp> __i,
|
---|
| 1455 | memory_order __m) noexcept
|
---|
| 1456 | { return __a->fetch_sub(__i, __m); }
|
---|
| 1457 |
|
---|
| 1458 | template<typename _ITp>
|
---|
| 1459 | inline _ITp
|
---|
| 1460 | atomic_fetch_sub_explicit(volatile atomic<_ITp>* __a,
|
---|
| 1461 | __atomic_diff_t<_ITp> __i,
|
---|
| 1462 | memory_order __m) noexcept
|
---|
| 1463 | { return __a->fetch_sub(__i, __m); }
|
---|
| 1464 |
|
---|
| 1465 | template<typename _ITp>
|
---|
| 1466 | inline _ITp
|
---|
| 1467 | atomic_fetch_and_explicit(__atomic_base<_ITp>* __a,
|
---|
| 1468 | __atomic_val_t<_ITp> __i,
|
---|
| 1469 | memory_order __m) noexcept
|
---|
| 1470 | { return __a->fetch_and(__i, __m); }
|
---|
| 1471 |
|
---|
| 1472 | template<typename _ITp>
|
---|
| 1473 | inline _ITp
|
---|
| 1474 | atomic_fetch_and_explicit(volatile __atomic_base<_ITp>* __a,
|
---|
| 1475 | __atomic_val_t<_ITp> __i,
|
---|
| 1476 | memory_order __m) noexcept
|
---|
| 1477 | { return __a->fetch_and(__i, __m); }
|
---|
| 1478 |
|
---|
| 1479 | template<typename _ITp>
|
---|
| 1480 | inline _ITp
|
---|
| 1481 | atomic_fetch_or_explicit(__atomic_base<_ITp>* __a,
|
---|
| 1482 | __atomic_val_t<_ITp> __i,
|
---|
| 1483 | memory_order __m) noexcept
|
---|
| 1484 | { return __a->fetch_or(__i, __m); }
|
---|
| 1485 |
|
---|
| 1486 | template<typename _ITp>
|
---|
| 1487 | inline _ITp
|
---|
| 1488 | atomic_fetch_or_explicit(volatile __atomic_base<_ITp>* __a,
|
---|
| 1489 | __atomic_val_t<_ITp> __i,
|
---|
| 1490 | memory_order __m) noexcept
|
---|
| 1491 | { return __a->fetch_or(__i, __m); }
|
---|
| 1492 |
|
---|
| 1493 | template<typename _ITp>
|
---|
| 1494 | inline _ITp
|
---|
| 1495 | atomic_fetch_xor_explicit(__atomic_base<_ITp>* __a,
|
---|
| 1496 | __atomic_val_t<_ITp> __i,
|
---|
| 1497 | memory_order __m) noexcept
|
---|
| 1498 | { return __a->fetch_xor(__i, __m); }
|
---|
| 1499 |
|
---|
| 1500 | template<typename _ITp>
|
---|
| 1501 | inline _ITp
|
---|
| 1502 | atomic_fetch_xor_explicit(volatile __atomic_base<_ITp>* __a,
|
---|
| 1503 | __atomic_val_t<_ITp> __i,
|
---|
| 1504 | memory_order __m) noexcept
|
---|
| 1505 | { return __a->fetch_xor(__i, __m); }
|
---|
| 1506 |
|
---|
| 1507 | template<typename _ITp>
|
---|
| 1508 | inline _ITp
|
---|
| 1509 | atomic_fetch_add(atomic<_ITp>* __a,
|
---|
| 1510 | __atomic_diff_t<_ITp> __i) noexcept
|
---|
| 1511 | { return atomic_fetch_add_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1512 |
|
---|
| 1513 | template<typename _ITp>
|
---|
| 1514 | inline _ITp
|
---|
| 1515 | atomic_fetch_add(volatile atomic<_ITp>* __a,
|
---|
| 1516 | __atomic_diff_t<_ITp> __i) noexcept
|
---|
| 1517 | { return atomic_fetch_add_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1518 |
|
---|
| 1519 | template<typename _ITp>
|
---|
| 1520 | inline _ITp
|
---|
| 1521 | atomic_fetch_sub(atomic<_ITp>* __a,
|
---|
| 1522 | __atomic_diff_t<_ITp> __i) noexcept
|
---|
| 1523 | { return atomic_fetch_sub_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1524 |
|
---|
| 1525 | template<typename _ITp>
|
---|
| 1526 | inline _ITp
|
---|
| 1527 | atomic_fetch_sub(volatile atomic<_ITp>* __a,
|
---|
| 1528 | __atomic_diff_t<_ITp> __i) noexcept
|
---|
| 1529 | { return atomic_fetch_sub_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1530 |
|
---|
| 1531 | template<typename _ITp>
|
---|
| 1532 | inline _ITp
|
---|
| 1533 | atomic_fetch_and(__atomic_base<_ITp>* __a,
|
---|
| 1534 | __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1535 | { return atomic_fetch_and_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1536 |
|
---|
| 1537 | template<typename _ITp>
|
---|
| 1538 | inline _ITp
|
---|
| 1539 | atomic_fetch_and(volatile __atomic_base<_ITp>* __a,
|
---|
| 1540 | __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1541 | { return atomic_fetch_and_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1542 |
|
---|
| 1543 | template<typename _ITp>
|
---|
| 1544 | inline _ITp
|
---|
| 1545 | atomic_fetch_or(__atomic_base<_ITp>* __a,
|
---|
| 1546 | __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1547 | { return atomic_fetch_or_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1548 |
|
---|
| 1549 | template<typename _ITp>
|
---|
| 1550 | inline _ITp
|
---|
| 1551 | atomic_fetch_or(volatile __atomic_base<_ITp>* __a,
|
---|
| 1552 | __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1553 | { return atomic_fetch_or_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1554 |
|
---|
| 1555 | template<typename _ITp>
|
---|
| 1556 | inline _ITp
|
---|
| 1557 | atomic_fetch_xor(__atomic_base<_ITp>* __a,
|
---|
| 1558 | __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1559 | { return atomic_fetch_xor_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1560 |
|
---|
| 1561 | template<typename _ITp>
|
---|
| 1562 | inline _ITp
|
---|
| 1563 | atomic_fetch_xor(volatile __atomic_base<_ITp>* __a,
|
---|
| 1564 | __atomic_val_t<_ITp> __i) noexcept
|
---|
| 1565 | { return atomic_fetch_xor_explicit(__a, __i, memory_order_seq_cst); }
|
---|
| 1566 |
|
---|
| 1567 | #if __cplusplus > 201703L
|
---|
| 1568 | #define __cpp_lib_atomic_float 201711L
|
---|
| 1569 | template<>
|
---|
| 1570 | struct atomic<float> : __atomic_float<float>
|
---|
| 1571 | {
|
---|
| 1572 | atomic() noexcept = default;
|
---|
| 1573 |
|
---|
| 1574 | constexpr
|
---|
| 1575 | atomic(float __fp) noexcept : __atomic_float<float>(__fp)
|
---|
| 1576 | { }
|
---|
| 1577 |
|
---|
| 1578 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 1579 | atomic& operator=(const atomic&) = delete;
|
---|
| 1580 |
|
---|
| 1581 | using __atomic_float<float>::operator=;
|
---|
| 1582 | };
|
---|
| 1583 |
|
---|
| 1584 | template<>
|
---|
| 1585 | struct atomic<double> : __atomic_float<double>
|
---|
| 1586 | {
|
---|
| 1587 | atomic() noexcept = default;
|
---|
| 1588 |
|
---|
| 1589 | constexpr
|
---|
| 1590 | atomic(double __fp) noexcept : __atomic_float<double>(__fp)
|
---|
| 1591 | { }
|
---|
| 1592 |
|
---|
| 1593 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 1594 | atomic& operator=(const atomic&) = delete;
|
---|
| 1595 |
|
---|
| 1596 | using __atomic_float<double>::operator=;
|
---|
| 1597 | };
|
---|
| 1598 |
|
---|
| 1599 | template<>
|
---|
| 1600 | struct atomic<long double> : __atomic_float<long double>
|
---|
| 1601 | {
|
---|
| 1602 | atomic() noexcept = default;
|
---|
| 1603 |
|
---|
| 1604 | constexpr
|
---|
| 1605 | atomic(long double __fp) noexcept : __atomic_float<long double>(__fp)
|
---|
| 1606 | { }
|
---|
| 1607 |
|
---|
| 1608 | atomic& operator=(const atomic&) volatile = delete;
|
---|
| 1609 | atomic& operator=(const atomic&) = delete;
|
---|
| 1610 |
|
---|
| 1611 | using __atomic_float<long double>::operator=;
|
---|
| 1612 | };
|
---|
| 1613 |
|
---|
| 1614 | #define __cpp_lib_atomic_ref 201806L
|
---|
| 1615 |
|
---|
| 1616 | /// Class template to provide atomic operations on a non-atomic variable.
|
---|
| 1617 | template<typename _Tp>
|
---|
| 1618 | struct atomic_ref : __atomic_ref<_Tp>
|
---|
| 1619 | {
|
---|
| 1620 | explicit
|
---|
| 1621 | atomic_ref(_Tp& __t) noexcept : __atomic_ref<_Tp>(__t)
|
---|
| 1622 | { }
|
---|
| 1623 |
|
---|
| 1624 | atomic_ref& operator=(const atomic_ref&) = delete;
|
---|
| 1625 |
|
---|
| 1626 | atomic_ref(const atomic_ref&) = default;
|
---|
| 1627 |
|
---|
| 1628 | using __atomic_ref<_Tp>::operator=;
|
---|
| 1629 | };
|
---|
| 1630 |
|
---|
| 1631 | #endif // C++2a
|
---|
| 1632 |
|
---|
| 1633 | /// @} group atomics
|
---|
| 1634 |
|
---|
| 1635 | _GLIBCXX_END_NAMESPACE_VERSION
|
---|
| 1636 | } // namespace
|
---|
| 1637 |
|
---|
| 1638 | #endif // C++11
|
---|
| 1639 |
|
---|
| 1640 | #endif // _GLIBCXX_ATOMIC
|
---|