1 /* Copyright (C) 2013 Free Software Foundation, Inc.
3 This file is part of GCC.
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)
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.
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.
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/>. */
24 /* ISO C11 Standard: 7.17 Atomics <stdatomic.h>. */
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
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
;
79 #define ATOMIC_VAR_INIT(VALUE) (VALUE)
80 #define atomic_init(PTR, VAL) \
87 #define kill_dependency(Y) \
90 __typeof__ (Y) __kill_dependency_tmp = (Y); \
91 __kill_dependency_tmp; \
94 #define atomic_thread_fence(MO) __atomic_thread_fence (MO)
95 #define atomic_signal_fence(MO) __atomic_signal_fence (MO)
96 #define atomic_is_lock_free(OBJ) __atomic_is_lock_free (sizeof (*(OBJ)), (OBJ))
98 #define __atomic_type_lock_free(T) \
99 (__atomic_always_lock_free (sizeof (T), (void *) 0) \
101 : (__atomic_is_lock_free (sizeof (T), (void *) 0) ? 1 : 0))
102 #define ATOMIC_BOOL_LOCK_FREE \
103 __atomic_type_lock_free (atomic_bool)
104 #define ATOMIC_CHAR_LOCK_FREE \
105 __atomic_type_lock_free (atomic_char)
106 #define ATOMIC_CHAR16_T_LOCK_FREE \
107 __atomic_type_lock_free (atomic_char16_t)
108 #define ATOMIC_CHAR32_T_LOCK_FREE \
109 __atomic_type_lock_free (atomic_char32_t)
110 #define ATOMIC_WCHAR_T_LOCK_FREE \
111 __atomic_type_lock_free (atomic_wchar_t)
112 #define ATOMIC_SHORT_LOCK_FREE \
113 __atomic_type_lock_free (atomic_short)
114 #define ATOMIC_INT_LOCK_FREE \
115 __atomic_type_lock_free (atomic_int)
116 #define ATOMIC_LONG_LOCK_FREE \
117 __atomic_type_lock_free (atomic_long)
118 #define ATOMIC_LLONG_LOCK_FREE \
119 __atomic_type_lock_free (atomic_llong)
120 #define ATOMIC_POINTER_LOCK_FREE \
121 __atomic_type_lock_free (void * _Atomic)
124 /* Note that these macros require __typeof__ to remove _Atomic
125 qualifiers (and const qualifiers, if those are valid on macro
128 Also note that the header file uses the generic form of __atomic
129 builtins, which requires the address to be taken of the value
130 parameter, and then we pass that value on. This allows the macros
131 to work for any type, and the compiler is smart enough to convert
132 these to lock-free _N variants if possible, and throw away the
135 #define atomic_store_explicit(PTR, VAL, MO) \
138 __typeof__ (*(PTR)) __atomic_store_tmp = (VAL); \
139 __atomic_store ((PTR), &__atomic_store_tmp, (MO)); \
142 #define atomic_store(PTR, VAL) \
143 atomic_store_explicit (PTR, VAL, __ATOMIC_SEQ_CST)
146 #define atomic_load_explicit(PTR, MO) \
149 __typeof__ (*(PTR)) __atomic_load_tmp; \
150 __atomic_load ((PTR), &__atomic_load_tmp, (MO)); \
154 #define atomic_load(PTR) atomic_load_explicit (PTR, __ATOMIC_SEQ_CST)
157 #define atomic_exchange_explicit(PTR, VAL, MO) \
160 __typeof__ (*(PTR)) __atomic_exchange_val = (VAL), __atomic_exchange_tmp; \
161 __atomic_exchange ((PTR), &__atomic_exchange_val, \
162 &__atomic_exchange_tmp, (MO)); \
163 __atomic_exchange_tmp; \
166 #define atomic_exchange(PTR, VAL) \
167 atomic_exchange_explicit (PTR, VAL, __ATOMIC_SEQ_CST)
170 #define atomic_compare_exchange_strong_explicit(PTR, VAL, DES, SUC, FAIL) \
173 __typeof__ (*(PTR)) __atomic_compare_exchange_tmp = (DES); \
174 __atomic_compare_exchange ((PTR), (VAL), \
175 &__atomic_compare_exchange_tmp, 0, \
179 #define atomic_compare_exchange_strong(PTR, VAL, DES) \
180 atomic_compare_exchange_strong_explicit (PTR, VAL, DES, __ATOMIC_SEQ_CST, \
183 #define atomic_compare_exchange_weak_explicit(PTR, VAL, DES, SUC, FAIL) \
186 __typeof__ (*(PTR)) __atomic_compare_exchange_tmp = (DES); \
187 __atomic_compare_exchange ((PTR), (VAL), \
188 &__atomic_compare_exchange_tmp, 1, \
192 #define atomic_compare_exchange_weak(PTR, VAL, DES) \
193 atomic_compare_exchange_weak_explicit (PTR, VAL, DES, __ATOMIC_SEQ_CST, \
198 #define atomic_fetch_add(PTR, VAL) __atomic_fetch_add ((PTR), (VAL), \
200 #define atomic_fetch_add_explicit(PTR, VAL, MO) \
201 __atomic_fetch_add ((PTR), (VAL), (MO))
203 #define atomic_fetch_sub(PTR, VAL) __atomic_fetch_sub ((PTR), (VAL), \
205 #define atomic_fetch_sub_explicit(PTR, VAL, MO) \
206 __atomic_fetch_sub ((PTR), (VAL), (MO))
208 #define atomic_fetch_or(PTR, VAL) __atomic_fetch_or ((PTR), (VAL), \
210 #define atomic_fetch_or_explicit(PTR, VAL, MO) \
211 __atomic_fetch_or ((PTR), (VAL), (MO))
213 #define atomic_fetch_xor(PTR, VAL) __atomic_fetch_xor ((PTR), (VAL), \
215 #define atomic_fetch_xor_explicit(PTR, VAL, MO) \
216 __atomic_fetch_xor ((PTR), (VAL), (MO))
218 #define atomic_fetch_and(PTR, VAL) __atomic_fetch_and ((PTR), (VAL), \
220 #define atomic_fetch_and_explicit(PTR, VAL, MO) \
221 __atomic_fetch_and ((PTR), (VAL), (MO))
224 typedef _Atomic
struct
226 #if __GCC_ATOMIC_TEST_AND_SET_TRUEVAL == 1
233 #define ATOMIC_FLAG_INIT { 0 }
236 #define atomic_flag_test_and_set(PTR) \
237 __atomic_test_and_set ((PTR), __ATOMIC_SEQ_CST)
238 #define atomic_flag_test_and_set_explicit(PTR, MO) \
239 __atomic_test_and_set ((PTR), (MO))
241 #define atomic_flag_clear(PTR) __atomic_clear ((PTR), __ATOMIC_SEQ_CST)
242 #define atomic_flag_clear_explicit(PTR, MO) __atomic_clear ((PTR), (MO))
244 #endif /* _STDATOMIC_H */