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1 | //===----------------------------------------------------------------------===// |
---|---|
2 | // |
3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
4 | // See https://llvm.org/LICENSE.txt for license information. |
5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
6 | // |
7 | //===----------------------------------------------------------------------===// |
8 | |
9 | #ifndef _LIBCPP___CXX03___ATOMIC_ATOMIC_BASE_H |
10 | #define _LIBCPP___CXX03___ATOMIC_ATOMIC_BASE_H |
11 | |
12 | #include <__cxx03/__atomic/atomic_sync.h> |
13 | #include <__cxx03/__atomic/check_memory_order.h> |
14 | #include <__cxx03/__atomic/cxx_atomic_impl.h> |
15 | #include <__cxx03/__atomic/is_always_lock_free.h> |
16 | #include <__cxx03/__atomic/memory_order.h> |
17 | #include <__cxx03/__config> |
18 | #include <__cxx03/__memory/addressof.h> |
19 | #include <__cxx03/__type_traits/is_integral.h> |
20 | #include <__cxx03/__type_traits/is_nothrow_constructible.h> |
21 | #include <__cxx03/__type_traits/is_same.h> |
22 | #include <__cxx03/version> |
23 | |
24 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
25 | # pragma GCC system_header |
26 | #endif |
27 | |
28 | _LIBCPP_BEGIN_NAMESPACE_STD |
29 | |
30 | template <class _Tp, bool = is_integral<_Tp>::value && !is_same<_Tp, bool>::value> |
31 | struct __atomic_base // false |
32 | { |
33 | mutable __cxx_atomic_impl<_Tp> __a_; |
34 | |
35 | _LIBCPP_HIDE_FROM_ABI bool is_lock_free() const volatile _NOEXCEPT { |
36 | return __cxx_atomic_is_lock_free(sizeof(__cxx_atomic_impl<_Tp>)); |
37 | } |
38 | _LIBCPP_HIDE_FROM_ABI bool is_lock_free() const _NOEXCEPT { |
39 | return static_cast<__atomic_base const volatile*>(this)->is_lock_free(); |
40 | } |
41 | _LIBCPP_HIDE_FROM_ABI void store(_Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT |
42 | _LIBCPP_CHECK_STORE_MEMORY_ORDER(__m) { |
43 | std::__cxx_atomic_store(std::addressof(__a_), __d, __m); |
44 | } |
45 | _LIBCPP_HIDE_FROM_ABI void store(_Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT |
46 | _LIBCPP_CHECK_STORE_MEMORY_ORDER(__m) { |
47 | std::__cxx_atomic_store(std::addressof(__a_), __d, __m); |
48 | } |
49 | _LIBCPP_HIDE_FROM_ABI _Tp load(memory_order __m = memory_order_seq_cst) const volatile _NOEXCEPT |
50 | _LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m) { |
51 | return std::__cxx_atomic_load(std::addressof(__a_), __m); |
52 | } |
53 | _LIBCPP_HIDE_FROM_ABI _Tp load(memory_order __m = memory_order_seq_cst) const _NOEXCEPT |
54 | _LIBCPP_CHECK_LOAD_MEMORY_ORDER(__m) { |
55 | return std::__cxx_atomic_load(std::addressof(__a_), __m); |
56 | } |
57 | _LIBCPP_HIDE_FROM_ABI operator _Tp() const volatile _NOEXCEPT { return load(); } |
58 | _LIBCPP_HIDE_FROM_ABI operator _Tp() const _NOEXCEPT { return load(); } |
59 | _LIBCPP_HIDE_FROM_ABI _Tp exchange(_Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT { |
60 | return std::__cxx_atomic_exchange(std::addressof(__a_), __d, __m); |
61 | } |
62 | _LIBCPP_HIDE_FROM_ABI _Tp exchange(_Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT { |
63 | return std::__cxx_atomic_exchange(std::addressof(__a_), __d, __m); |
64 | } |
65 | _LIBCPP_HIDE_FROM_ABI bool |
66 | compare_exchange_weak(_Tp& __e, _Tp __d, memory_order __s, memory_order __f) volatile _NOEXCEPT |
67 | _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) { |
68 | return std::__cxx_atomic_compare_exchange_weak(std::addressof(__a_), std::addressof(__e), __d, __s, __f); |
69 | } |
70 | _LIBCPP_HIDE_FROM_ABI bool compare_exchange_weak(_Tp& __e, _Tp __d, memory_order __s, memory_order __f) _NOEXCEPT |
71 | _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) { |
72 | return std::__cxx_atomic_compare_exchange_weak(std::addressof(__a_), std::addressof(__e), __d, __s, __f); |
73 | } |
74 | _LIBCPP_HIDE_FROM_ABI bool |
75 | compare_exchange_strong(_Tp& __e, _Tp __d, memory_order __s, memory_order __f) volatile _NOEXCEPT |
76 | _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) { |
77 | return std::__cxx_atomic_compare_exchange_strong(std::addressof(__a_), std::addressof(__e), __d, __s, __f); |
78 | } |
79 | _LIBCPP_HIDE_FROM_ABI bool compare_exchange_strong(_Tp& __e, _Tp __d, memory_order __s, memory_order __f) _NOEXCEPT |
80 | _LIBCPP_CHECK_EXCHANGE_MEMORY_ORDER(__s, __f) { |
81 | return std::__cxx_atomic_compare_exchange_strong(std::addressof(__a_), std::addressof(__e), __d, __s, __f); |
82 | } |
83 | _LIBCPP_HIDE_FROM_ABI bool |
84 | compare_exchange_weak(_Tp& __e, _Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT { |
85 | return std::__cxx_atomic_compare_exchange_weak(std::addressof(__a_), std::addressof(__e), __d, __m, __m); |
86 | } |
87 | _LIBCPP_HIDE_FROM_ABI bool |
88 | compare_exchange_weak(_Tp& __e, _Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT { |
89 | return std::__cxx_atomic_compare_exchange_weak(std::addressof(__a_), std::addressof(__e), __d, __m, __m); |
90 | } |
91 | _LIBCPP_HIDE_FROM_ABI bool |
92 | compare_exchange_strong(_Tp& __e, _Tp __d, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT { |
93 | return std::__cxx_atomic_compare_exchange_strong(std::addressof(__a_), std::addressof(__e), __d, __m, __m); |
94 | } |
95 | _LIBCPP_HIDE_FROM_ABI bool |
96 | compare_exchange_strong(_Tp& __e, _Tp __d, memory_order __m = memory_order_seq_cst) _NOEXCEPT { |
97 | return std::__cxx_atomic_compare_exchange_strong(std::addressof(__a_), std::addressof(__e), __d, __m, __m); |
98 | } |
99 | |
100 | _LIBCPP_AVAILABILITY_SYNC _LIBCPP_HIDE_FROM_ABI void wait(_Tp __v, memory_order __m = memory_order_seq_cst) const |
101 | volatile _NOEXCEPT { |
102 | std::__atomic_wait(*this, __v, __m); |
103 | } |
104 | _LIBCPP_AVAILABILITY_SYNC _LIBCPP_HIDE_FROM_ABI void |
105 | wait(_Tp __v, memory_order __m = memory_order_seq_cst) const _NOEXCEPT { |
106 | std::__atomic_wait(*this, __v, __m); |
107 | } |
108 | _LIBCPP_AVAILABILITY_SYNC _LIBCPP_HIDE_FROM_ABI void notify_one() volatile _NOEXCEPT { |
109 | std::__atomic_notify_one(*this); |
110 | } |
111 | _LIBCPP_AVAILABILITY_SYNC _LIBCPP_HIDE_FROM_ABI void notify_one() _NOEXCEPT { std::__atomic_notify_one(*this); } |
112 | _LIBCPP_AVAILABILITY_SYNC _LIBCPP_HIDE_FROM_ABI void notify_all() volatile _NOEXCEPT { |
113 | std::__atomic_notify_all(*this); |
114 | } |
115 | _LIBCPP_AVAILABILITY_SYNC _LIBCPP_HIDE_FROM_ABI void notify_all() _NOEXCEPT { std::__atomic_notify_all(*this); } |
116 | |
117 | _LIBCPP_HIDE_FROM_ABI __atomic_base() _NOEXCEPT = default; |
118 | |
119 | _LIBCPP_HIDE_FROM_ABI __atomic_base(_Tp __d) _NOEXCEPT : __a_(__d) {} |
120 | |
121 | __atomic_base(const __atomic_base&) = delete; |
122 | }; |
123 | |
124 | // atomic<Integral> |
125 | |
126 | template <class _Tp> |
127 | struct __atomic_base<_Tp, true> : public __atomic_base<_Tp, false> { |
128 | using __base = __atomic_base<_Tp, false>; |
129 | |
130 | _LIBCPP_HIDE_FROM_ABI __atomic_base() _NOEXCEPT = default; |
131 | |
132 | _LIBCPP_HIDE_FROM_ABI __atomic_base(_Tp __d) _NOEXCEPT : __base(__d) {} |
133 | |
134 | _LIBCPP_HIDE_FROM_ABI _Tp fetch_add(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT { |
135 | return std::__cxx_atomic_fetch_add(std::addressof(this->__a_), __op, __m); |
136 | } |
137 | _LIBCPP_HIDE_FROM_ABI _Tp fetch_add(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT { |
138 | return std::__cxx_atomic_fetch_add(std::addressof(this->__a_), __op, __m); |
139 | } |
140 | _LIBCPP_HIDE_FROM_ABI _Tp fetch_sub(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT { |
141 | return std::__cxx_atomic_fetch_sub(std::addressof(this->__a_), __op, __m); |
142 | } |
143 | _LIBCPP_HIDE_FROM_ABI _Tp fetch_sub(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT { |
144 | return std::__cxx_atomic_fetch_sub(std::addressof(this->__a_), __op, __m); |
145 | } |
146 | _LIBCPP_HIDE_FROM_ABI _Tp fetch_and(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT { |
147 | return std::__cxx_atomic_fetch_and(std::addressof(this->__a_), __op, __m); |
148 | } |
149 | _LIBCPP_HIDE_FROM_ABI _Tp fetch_and(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT { |
150 | return std::__cxx_atomic_fetch_and(std::addressof(this->__a_), __op, __m); |
151 | } |
152 | _LIBCPP_HIDE_FROM_ABI _Tp fetch_or(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT { |
153 | return std::__cxx_atomic_fetch_or(std::addressof(this->__a_), __op, __m); |
154 | } |
155 | _LIBCPP_HIDE_FROM_ABI _Tp fetch_or(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT { |
156 | return std::__cxx_atomic_fetch_or(std::addressof(this->__a_), __op, __m); |
157 | } |
158 | _LIBCPP_HIDE_FROM_ABI _Tp fetch_xor(_Tp __op, memory_order __m = memory_order_seq_cst) volatile _NOEXCEPT { |
159 | return std::__cxx_atomic_fetch_xor(std::addressof(this->__a_), __op, __m); |
160 | } |
161 | _LIBCPP_HIDE_FROM_ABI _Tp fetch_xor(_Tp __op, memory_order __m = memory_order_seq_cst) _NOEXCEPT { |
162 | return std::__cxx_atomic_fetch_xor(std::addressof(this->__a_), __op, __m); |
163 | } |
164 | |
165 | _LIBCPP_HIDE_FROM_ABI _Tp operator++(int) volatile _NOEXCEPT { return fetch_add(_Tp(1)); } |
166 | _LIBCPP_HIDE_FROM_ABI _Tp operator++(int) _NOEXCEPT { return fetch_add(_Tp(1)); } |
167 | _LIBCPP_HIDE_FROM_ABI _Tp operator--(int) volatile _NOEXCEPT { return fetch_sub(_Tp(1)); } |
168 | _LIBCPP_HIDE_FROM_ABI _Tp operator--(int) _NOEXCEPT { return fetch_sub(_Tp(1)); } |
169 | _LIBCPP_HIDE_FROM_ABI _Tp operator++() volatile _NOEXCEPT { return fetch_add(_Tp(1)) + _Tp(1); } |
170 | _LIBCPP_HIDE_FROM_ABI _Tp operator++() _NOEXCEPT { return fetch_add(_Tp(1)) + _Tp(1); } |
171 | _LIBCPP_HIDE_FROM_ABI _Tp operator--() volatile _NOEXCEPT { return fetch_sub(_Tp(1)) - _Tp(1); } |
172 | _LIBCPP_HIDE_FROM_ABI _Tp operator--() _NOEXCEPT { return fetch_sub(_Tp(1)) - _Tp(1); } |
173 | _LIBCPP_HIDE_FROM_ABI _Tp operator+=(_Tp __op) volatile _NOEXCEPT { return fetch_add(__op) + __op; } |
174 | _LIBCPP_HIDE_FROM_ABI _Tp operator+=(_Tp __op) _NOEXCEPT { return fetch_add(__op) + __op; } |
175 | _LIBCPP_HIDE_FROM_ABI _Tp operator-=(_Tp __op) volatile _NOEXCEPT { return fetch_sub(__op) - __op; } |
176 | _LIBCPP_HIDE_FROM_ABI _Tp operator-=(_Tp __op) _NOEXCEPT { return fetch_sub(__op) - __op; } |
177 | _LIBCPP_HIDE_FROM_ABI _Tp operator&=(_Tp __op) volatile _NOEXCEPT { return fetch_and(__op) & __op; } |
178 | _LIBCPP_HIDE_FROM_ABI _Tp operator&=(_Tp __op) _NOEXCEPT { return fetch_and(__op) & __op; } |
179 | _LIBCPP_HIDE_FROM_ABI _Tp operator|=(_Tp __op) volatile _NOEXCEPT { return fetch_or(__op) | __op; } |
180 | _LIBCPP_HIDE_FROM_ABI _Tp operator|=(_Tp __op) _NOEXCEPT { return fetch_or(__op) | __op; } |
181 | _LIBCPP_HIDE_FROM_ABI _Tp operator^=(_Tp __op) volatile _NOEXCEPT { return fetch_xor(__op) ^ __op; } |
182 | _LIBCPP_HIDE_FROM_ABI _Tp operator^=(_Tp __op) _NOEXCEPT { return fetch_xor(__op) ^ __op; } |
183 | }; |
184 | |
185 | // Here we need _IsIntegral because the default template argument is not enough |
186 | // e.g __atomic_base<int> is __atomic_base<int, true>, which inherits from |
187 | // __atomic_base<int, false> and the caller of the wait function is |
188 | // __atomic_base<int, false>. So specializing __atomic_base<_Tp> does not work |
189 | template <class _Tp, bool _IsIntegral> |
190 | struct __atomic_waitable_traits<__atomic_base<_Tp, _IsIntegral> > { |
191 | static _LIBCPP_HIDE_FROM_ABI _Tp __atomic_load(const __atomic_base<_Tp, _IsIntegral>& __a, memory_order __order) { |
192 | return __a.load(__order); |
193 | } |
194 | |
195 | static _LIBCPP_HIDE_FROM_ABI _Tp |
196 | __atomic_load(const volatile __atomic_base<_Tp, _IsIntegral>& __this, memory_order __order) { |
197 | return __this.load(__order); |
198 | } |
199 | |
200 | static _LIBCPP_HIDE_FROM_ABI const __cxx_atomic_impl<_Tp>* |
201 | __atomic_contention_address(const __atomic_base<_Tp, _IsIntegral>& __a) { |
202 | return std::addressof(__a.__a_); |
203 | } |
204 | |
205 | static _LIBCPP_HIDE_FROM_ABI const volatile __cxx_atomic_impl<_Tp>* |
206 | __atomic_contention_address(const volatile __atomic_base<_Tp, _IsIntegral>& __this) { |
207 | return std::addressof(__this.__a_); |
208 | } |
209 | }; |
210 | |
211 | _LIBCPP_END_NAMESPACE_STD |
212 | |
213 | #endif // _LIBCPP___CXX03___ATOMIC_ATOMIC_BASE_H |
214 |
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