1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___ATOMIC_SUPPORT_C11_H
#define _LIBCPP___ATOMIC_SUPPORT_C11_H
#include <__atomic/memory_order.h>
#include <__config>
#include <__cstddef/ptrdiff_t.h>
#include <__memory/addressof.h>
#include <__type_traits/remove_const.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
//
// This file implements support for C11-style atomics
//
_LIBCPP_BEGIN_NAMESPACE_STD
template <typename _Tp>
struct __cxx_atomic_base_impl {
_LIBCPP_HIDE_FROM_ABI
#ifndef _LIBCPP_CXX03_LANG
__cxx_atomic_base_impl() _NOEXCEPT = default;
#else
__cxx_atomic_base_impl() _NOEXCEPT : __a_value() {
}
#endif // _LIBCPP_CXX03_LANG
_LIBCPP_CONSTEXPR explicit __cxx_atomic_base_impl(_Tp __value) _NOEXCEPT : __a_value(__value) {}
_LIBCPP_DISABLE_EXTENSION_WARNING _Atomic(_Tp) __a_value;
};
#define __cxx_atomic_is_lock_free(__s) __c11_atomic_is_lock_free(__s)
_LIBCPP_HIDE_FROM_ABI inline void __cxx_atomic_thread_fence(memory_order __order) _NOEXCEPT {
__c11_atomic_thread_fence(static_cast<__memory_order_underlying_t>(__order));
}
_LIBCPP_HIDE_FROM_ABI inline void __cxx_atomic_signal_fence(memory_order __order) _NOEXCEPT {
__c11_atomic_signal_fence(static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI void __cxx_atomic_init(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __val) _NOEXCEPT {
__c11_atomic_init(std::addressof(__a->__a_value), __val);
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI void __cxx_atomic_init(__cxx_atomic_base_impl<_Tp>* __a, _Tp __val) _NOEXCEPT {
__c11_atomic_init(std::addressof(__a->__a_value), __val);
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI void
__cxx_atomic_store(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __val, memory_order __order) _NOEXCEPT {
__c11_atomic_store(std::addressof(__a->__a_value), __val, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI void
__cxx_atomic_store(__cxx_atomic_base_impl<_Tp>* __a, _Tp __val, memory_order __order) _NOEXCEPT {
__c11_atomic_store(std::addressof(__a->__a_value), __val, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_load(__cxx_atomic_base_impl<_Tp> const volatile* __a, memory_order __order) _NOEXCEPT {
using __ptr_type = __remove_const_t<decltype(__a->__a_value)>*;
return __c11_atomic_load(
const_cast<__ptr_type>(std::addressof(__a->__a_value)), static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp __cxx_atomic_load(__cxx_atomic_base_impl<_Tp> const* __a, memory_order __order) _NOEXCEPT {
using __ptr_type = __remove_const_t<decltype(__a->__a_value)>*;
return __c11_atomic_load(
const_cast<__ptr_type>(std::addressof(__a->__a_value)), static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI void
__cxx_atomic_load_inplace(__cxx_atomic_base_impl<_Tp> const volatile* __a, _Tp* __dst, memory_order __order) _NOEXCEPT {
using __ptr_type = __remove_const_t<decltype(__a->__a_value)>*;
*__dst = __c11_atomic_load(
const_cast<__ptr_type>(std::addressof(__a->__a_value)), static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI void
__cxx_atomic_load_inplace(__cxx_atomic_base_impl<_Tp> const* __a, _Tp* __dst, memory_order __order) _NOEXCEPT {
using __ptr_type = __remove_const_t<decltype(__a->__a_value)>*;
*__dst = __c11_atomic_load(
const_cast<__ptr_type>(std::addressof(__a->__a_value)), static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_exchange(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __value, memory_order __order) _NOEXCEPT {
return __c11_atomic_exchange(
std::addressof(__a->__a_value), __value, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_exchange(__cxx_atomic_base_impl<_Tp>* __a, _Tp __value, memory_order __order) _NOEXCEPT {
return __c11_atomic_exchange(
std::addressof(__a->__a_value), __value, static_cast<__memory_order_underlying_t>(__order));
}
_LIBCPP_HIDE_FROM_ABI inline _LIBCPP_CONSTEXPR memory_order __to_failure_order(memory_order __order) {
// Avoid switch statement to make this a constexpr.
return __order == memory_order_release
? memory_order_relaxed
: (__order == memory_order_acq_rel ? memory_order_acquire : __order);
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI bool __cxx_atomic_compare_exchange_strong(
__cxx_atomic_base_impl<_Tp> volatile* __a,
_Tp* __expected,
_Tp __value,
memory_order __success,
memory_order __failure) _NOEXCEPT {
return __c11_atomic_compare_exchange_strong(
std::addressof(__a->__a_value),
__expected,
__value,
static_cast<__memory_order_underlying_t>(__success),
static_cast<__memory_order_underlying_t>(__to_failure_order(__failure)));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI bool __cxx_atomic_compare_exchange_strong(
__cxx_atomic_base_impl<_Tp>* __a, _Tp* __expected, _Tp __value, memory_order __success, memory_order __failure)
_NOEXCEPT {
return __c11_atomic_compare_exchange_strong(
std::addressof(__a->__a_value),
__expected,
__value,
static_cast<__memory_order_underlying_t>(__success),
static_cast<__memory_order_underlying_t>(__to_failure_order(__failure)));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI bool __cxx_atomic_compare_exchange_weak(
__cxx_atomic_base_impl<_Tp> volatile* __a,
_Tp* __expected,
_Tp __value,
memory_order __success,
memory_order __failure) _NOEXCEPT {
return __c11_atomic_compare_exchange_weak(
std::addressof(__a->__a_value),
__expected,
__value,
static_cast<__memory_order_underlying_t>(__success),
static_cast<__memory_order_underlying_t>(__to_failure_order(__failure)));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI bool __cxx_atomic_compare_exchange_weak(
__cxx_atomic_base_impl<_Tp>* __a, _Tp* __expected, _Tp __value, memory_order __success, memory_order __failure)
_NOEXCEPT {
return __c11_atomic_compare_exchange_weak(
std::addressof(__a->__a_value),
__expected,
__value,
static_cast<__memory_order_underlying_t>(__success),
static_cast<__memory_order_underlying_t>(__to_failure_order(__failure)));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __delta, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_add(
std::addressof(__a->__a_value), __delta, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp>* __a, _Tp __delta, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_add(
std::addressof(__a->__a_value), __delta, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp*
__cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp*> volatile* __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_add(
std::addressof(__a->__a_value), __delta, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp*
__cxx_atomic_fetch_add(__cxx_atomic_base_impl<_Tp*>* __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_add(
std::addressof(__a->__a_value), __delta, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __delta, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_sub(
std::addressof(__a->__a_value), __delta, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp>* __a, _Tp __delta, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_sub(
std::addressof(__a->__a_value), __delta, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp*
__cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp*> volatile* __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_sub(
std::addressof(__a->__a_value), __delta, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp*
__cxx_atomic_fetch_sub(__cxx_atomic_base_impl<_Tp*>* __a, ptrdiff_t __delta, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_sub(
std::addressof(__a->__a_value), __delta, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_fetch_and(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_and(
std::addressof(__a->__a_value), __pattern, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_fetch_and(__cxx_atomic_base_impl<_Tp>* __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_and(
std::addressof(__a->__a_value), __pattern, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_fetch_or(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_or(
std::addressof(__a->__a_value), __pattern, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_fetch_or(__cxx_atomic_base_impl<_Tp>* __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_or(
std::addressof(__a->__a_value), __pattern, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_fetch_xor(__cxx_atomic_base_impl<_Tp> volatile* __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_xor(
std::addressof(__a->__a_value), __pattern, static_cast<__memory_order_underlying_t>(__order));
}
template <class _Tp>
_LIBCPP_HIDE_FROM_ABI _Tp
__cxx_atomic_fetch_xor(__cxx_atomic_base_impl<_Tp>* __a, _Tp __pattern, memory_order __order) _NOEXCEPT {
return __c11_atomic_fetch_xor(
std::addressof(__a->__a_value), __pattern, static_cast<__memory_order_underlying_t>(__order));
}
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___ATOMIC_SUPPORT_C11_H
|
