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comparison gcc/ginclude/stdatomic.h @ 111:04ced10e8804

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gcc 7
author kono
date Fri, 27 Oct 2017 22:46:09 +0900
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children 84e7813d76e9
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68:561a7518be6b 111:04ced10e8804
1 /* Copyright (C) 2013-2017 Free Software Foundation, Inc.
2
3 This file is part of GCC.
4
5 GCC is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 3, or (at your option)
8 any later version.
9
10 GCC is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 Under Section 7 of GPL version 3, you are granted additional
16 permissions described in the GCC Runtime Library Exception, version
17 3.1, as published by the Free Software Foundation.
18
19 You should have received a copy of the GNU General Public License and
20 a copy of the GCC Runtime Library Exception along with this program;
21 see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
22 <http://www.gnu.org/licenses/>. */
23
24 /* ISO C11 Standard: 7.17 Atomics <stdatomic.h>. */
25
26 #ifndef _STDATOMIC_H
27 #define _STDATOMIC_H
28
29 typedef enum
30 {
31 memory_order_relaxed = __ATOMIC_RELAXED,
32 memory_order_consume = __ATOMIC_CONSUME,
33 memory_order_acquire = __ATOMIC_ACQUIRE,
34 memory_order_release = __ATOMIC_RELEASE,
35 memory_order_acq_rel = __ATOMIC_ACQ_REL,
36 memory_order_seq_cst = __ATOMIC_SEQ_CST
37 } memory_order;
38
39
40 typedef _Atomic _Bool atomic_bool;
41 typedef _Atomic char atomic_char;
42 typedef _Atomic signed char atomic_schar;
43 typedef _Atomic unsigned char atomic_uchar;
44 typedef _Atomic short atomic_short;
45 typedef _Atomic unsigned short atomic_ushort;
46 typedef _Atomic int atomic_int;
47 typedef _Atomic unsigned int atomic_uint;
48 typedef _Atomic long atomic_long;
49 typedef _Atomic unsigned long atomic_ulong;
50 typedef _Atomic long long atomic_llong;
51 typedef _Atomic unsigned long long atomic_ullong;
52 typedef _Atomic __CHAR16_TYPE__ atomic_char16_t;
53 typedef _Atomic __CHAR32_TYPE__ atomic_char32_t;
54 typedef _Atomic __WCHAR_TYPE__ atomic_wchar_t;
55 typedef _Atomic __INT_LEAST8_TYPE__ atomic_int_least8_t;
56 typedef _Atomic __UINT_LEAST8_TYPE__ atomic_uint_least8_t;
57 typedef _Atomic __INT_LEAST16_TYPE__ atomic_int_least16_t;
58 typedef _Atomic __UINT_LEAST16_TYPE__ atomic_uint_least16_t;
59 typedef _Atomic __INT_LEAST32_TYPE__ atomic_int_least32_t;
60 typedef _Atomic __UINT_LEAST32_TYPE__ atomic_uint_least32_t;
61 typedef _Atomic __INT_LEAST64_TYPE__ atomic_int_least64_t;
62 typedef _Atomic __UINT_LEAST64_TYPE__ atomic_uint_least64_t;
63 typedef _Atomic __INT_FAST8_TYPE__ atomic_int_fast8_t;
64 typedef _Atomic __UINT_FAST8_TYPE__ atomic_uint_fast8_t;
65 typedef _Atomic __INT_FAST16_TYPE__ atomic_int_fast16_t;
66 typedef _Atomic __UINT_FAST16_TYPE__ atomic_uint_fast16_t;
67 typedef _Atomic __INT_FAST32_TYPE__ atomic_int_fast32_t;
68 typedef _Atomic __UINT_FAST32_TYPE__ atomic_uint_fast32_t;
69 typedef _Atomic __INT_FAST64_TYPE__ atomic_int_fast64_t;
70 typedef _Atomic __UINT_FAST64_TYPE__ atomic_uint_fast64_t;
71 typedef _Atomic __INTPTR_TYPE__ atomic_intptr_t;
72 typedef _Atomic __UINTPTR_TYPE__ atomic_uintptr_t;
73 typedef _Atomic __SIZE_TYPE__ atomic_size_t;
74 typedef _Atomic __PTRDIFF_TYPE__ atomic_ptrdiff_t;
75 typedef _Atomic __INTMAX_TYPE__ atomic_intmax_t;
76 typedef _Atomic __UINTMAX_TYPE__ atomic_uintmax_t;
77
78
79 #define ATOMIC_VAR_INIT(VALUE) (VALUE)
80
81 /* Initialize an atomic object pointed to by PTR with VAL. */
82 #define atomic_init(PTR, VAL) \
83 atomic_store_explicit (PTR, VAL, __ATOMIC_RELAXED)
84
85 #define kill_dependency(Y) \
86 __extension__ \
87 ({ \
88 __auto_type __kill_dependency_tmp = (Y); \
89 __kill_dependency_tmp; \
90 })
91
92 extern void atomic_thread_fence (memory_order);
93 #define atomic_thread_fence(MO) __atomic_thread_fence (MO)
94 extern void atomic_signal_fence (memory_order);
95 #define atomic_signal_fence(MO) __atomic_signal_fence (MO)
96 #define atomic_is_lock_free(OBJ) __atomic_is_lock_free (sizeof (*(OBJ)), (OBJ))
97
98 #define ATOMIC_BOOL_LOCK_FREE __GCC_ATOMIC_BOOL_LOCK_FREE
99 #define ATOMIC_CHAR_LOCK_FREE __GCC_ATOMIC_CHAR_LOCK_FREE
100 #define ATOMIC_CHAR16_T_LOCK_FREE __GCC_ATOMIC_CHAR16_T_LOCK_FREE
101 #define ATOMIC_CHAR32_T_LOCK_FREE __GCC_ATOMIC_CHAR32_T_LOCK_FREE
102 #define ATOMIC_WCHAR_T_LOCK_FREE __GCC_ATOMIC_WCHAR_T_LOCK_FREE
103 #define ATOMIC_SHORT_LOCK_FREE __GCC_ATOMIC_SHORT_LOCK_FREE
104 #define ATOMIC_INT_LOCK_FREE __GCC_ATOMIC_INT_LOCK_FREE
105 #define ATOMIC_LONG_LOCK_FREE __GCC_ATOMIC_LONG_LOCK_FREE
106 #define ATOMIC_LLONG_LOCK_FREE __GCC_ATOMIC_LLONG_LOCK_FREE
107 #define ATOMIC_POINTER_LOCK_FREE __GCC_ATOMIC_POINTER_LOCK_FREE
108
109
110 /* Note that these macros require __typeof__ and __auto_type to remove
111 _Atomic qualifiers (and const qualifiers, if those are valid on
112 macro operands).
113
114 Also note that the header file uses the generic form of __atomic
115 builtins, which requires the address to be taken of the value
116 parameter, and then we pass that value on. This allows the macros
117 to work for any type, and the compiler is smart enough to convert
118 these to lock-free _N variants if possible, and throw away the
119 temps. */
120
121 #define atomic_store_explicit(PTR, VAL, MO) \
122 __extension__ \
123 ({ \
124 __auto_type __atomic_store_ptr = (PTR); \
125 __typeof__ (*__atomic_store_ptr) __atomic_store_tmp = (VAL); \
126 __atomic_store (__atomic_store_ptr, &__atomic_store_tmp, (MO)); \
127 })
128
129 #define atomic_store(PTR, VAL) \
130 atomic_store_explicit (PTR, VAL, __ATOMIC_SEQ_CST)
131
132
133 #define atomic_load_explicit(PTR, MO) \
134 __extension__ \
135 ({ \
136 __auto_type __atomic_load_ptr = (PTR); \
137 __typeof__ (*__atomic_load_ptr) __atomic_load_tmp; \
138 __atomic_load (__atomic_load_ptr, &__atomic_load_tmp, (MO)); \
139 __atomic_load_tmp; \
140 })
141
142 #define atomic_load(PTR) atomic_load_explicit (PTR, __ATOMIC_SEQ_CST)
143
144
145 #define atomic_exchange_explicit(PTR, VAL, MO) \
146 __extension__ \
147 ({ \
148 __auto_type __atomic_exchange_ptr = (PTR); \
149 __typeof__ (*__atomic_exchange_ptr) __atomic_exchange_val = (VAL); \
150 __typeof__ (*__atomic_exchange_ptr) __atomic_exchange_tmp; \
151 __atomic_exchange (__atomic_exchange_ptr, &__atomic_exchange_val, \
152 &__atomic_exchange_tmp, (MO)); \
153 __atomic_exchange_tmp; \
154 })
155
156 #define atomic_exchange(PTR, VAL) \
157 atomic_exchange_explicit (PTR, VAL, __ATOMIC_SEQ_CST)
158
159
160 #define atomic_compare_exchange_strong_explicit(PTR, VAL, DES, SUC, FAIL) \
161 __extension__ \
162 ({ \
163 __auto_type __atomic_compare_exchange_ptr = (PTR); \
164 __typeof__ (*__atomic_compare_exchange_ptr) __atomic_compare_exchange_tmp \
165 = (DES); \
166 __atomic_compare_exchange (__atomic_compare_exchange_ptr, (VAL), \
167 &__atomic_compare_exchange_tmp, 0, \
168 (SUC), (FAIL)); \
169 })
170
171 #define atomic_compare_exchange_strong(PTR, VAL, DES) \
172 atomic_compare_exchange_strong_explicit (PTR, VAL, DES, __ATOMIC_SEQ_CST, \
173 __ATOMIC_SEQ_CST)
174
175 #define atomic_compare_exchange_weak_explicit(PTR, VAL, DES, SUC, FAIL) \
176 __extension__ \
177 ({ \
178 __auto_type __atomic_compare_exchange_ptr = (PTR); \
179 __typeof__ (*__atomic_compare_exchange_ptr) __atomic_compare_exchange_tmp \
180 = (DES); \
181 __atomic_compare_exchange (__atomic_compare_exchange_ptr, (VAL), \
182 &__atomic_compare_exchange_tmp, 1, \
183 (SUC), (FAIL)); \
184 })
185
186 #define atomic_compare_exchange_weak(PTR, VAL, DES) \
187 atomic_compare_exchange_weak_explicit (PTR, VAL, DES, __ATOMIC_SEQ_CST, \
188 __ATOMIC_SEQ_CST)
189
190
191
192 #define atomic_fetch_add(PTR, VAL) __atomic_fetch_add ((PTR), (VAL), \
193 __ATOMIC_SEQ_CST)
194 #define atomic_fetch_add_explicit(PTR, VAL, MO) \
195 __atomic_fetch_add ((PTR), (VAL), (MO))
196
197 #define atomic_fetch_sub(PTR, VAL) __atomic_fetch_sub ((PTR), (VAL), \
198 __ATOMIC_SEQ_CST)
199 #define atomic_fetch_sub_explicit(PTR, VAL, MO) \
200 __atomic_fetch_sub ((PTR), (VAL), (MO))
201
202 #define atomic_fetch_or(PTR, VAL) __atomic_fetch_or ((PTR), (VAL), \
203 __ATOMIC_SEQ_CST)
204 #define atomic_fetch_or_explicit(PTR, VAL, MO) \
205 __atomic_fetch_or ((PTR), (VAL), (MO))
206
207 #define atomic_fetch_xor(PTR, VAL) __atomic_fetch_xor ((PTR), (VAL), \
208 __ATOMIC_SEQ_CST)
209 #define atomic_fetch_xor_explicit(PTR, VAL, MO) \
210 __atomic_fetch_xor ((PTR), (VAL), (MO))
211
212 #define atomic_fetch_and(PTR, VAL) __atomic_fetch_and ((PTR), (VAL), \
213 __ATOMIC_SEQ_CST)
214 #define atomic_fetch_and_explicit(PTR, VAL, MO) \
215 __atomic_fetch_and ((PTR), (VAL), (MO))
216
217
218 typedef _Atomic struct
219 {
220 #if __GCC_ATOMIC_TEST_AND_SET_TRUEVAL == 1
221 _Bool __val;
222 #else
223 unsigned char __val;
224 #endif
225 } atomic_flag;
226
227 #define ATOMIC_FLAG_INIT { 0 }
228
229
230 extern _Bool atomic_flag_test_and_set (volatile atomic_flag *);
231 #define atomic_flag_test_and_set(PTR) \
232 __atomic_test_and_set ((PTR), __ATOMIC_SEQ_CST)
233 extern _Bool atomic_flag_test_and_set_explicit (volatile atomic_flag *,
234 memory_order);
235 #define atomic_flag_test_and_set_explicit(PTR, MO) \
236 __atomic_test_and_set ((PTR), (MO))
237
238 extern void atomic_flag_clear (volatile atomic_flag *);
239 #define atomic_flag_clear(PTR) __atomic_clear ((PTR), __ATOMIC_SEQ_CST)
240 extern void atomic_flag_clear_explicit (volatile atomic_flag *, memory_order);
241 #define atomic_flag_clear_explicit(PTR, MO) __atomic_clear ((PTR), (MO))
242
243 #endif /* _STDATOMIC_H */