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stdatomic.h
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1 /*===---- stdatomic.h - Standard header for atomic types and operations -----===
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 
10 #ifndef __CLANG_STDATOMIC_H
11 #define __CLANG_STDATOMIC_H
12 
13 /* If we're hosted, fall back to the system's stdatomic.h. FreeBSD, for
14  * example, already has a Clang-compatible stdatomic.h header.
15  */
16 #if __STDC_HOSTED__ && __has_include_next(<stdatomic.h>)
17 # include_next <stdatomic.h>
18 #else
19 
20 #include <stddef.h>
21 #include <stdint.h>
22 
23 #ifdef __cplusplus
24 extern "C" {
25 #endif
26 
27 /* 7.17.1 Introduction */
28 
29 #define ATOMIC_BOOL_LOCK_FREE __CLANG_ATOMIC_BOOL_LOCK_FREE
30 #define ATOMIC_CHAR_LOCK_FREE __CLANG_ATOMIC_CHAR_LOCK_FREE
31 #define ATOMIC_CHAR16_T_LOCK_FREE __CLANG_ATOMIC_CHAR16_T_LOCK_FREE
32 #define ATOMIC_CHAR32_T_LOCK_FREE __CLANG_ATOMIC_CHAR32_T_LOCK_FREE
33 #define ATOMIC_WCHAR_T_LOCK_FREE __CLANG_ATOMIC_WCHAR_T_LOCK_FREE
34 #define ATOMIC_SHORT_LOCK_FREE __CLANG_ATOMIC_SHORT_LOCK_FREE
35 #define ATOMIC_INT_LOCK_FREE __CLANG_ATOMIC_INT_LOCK_FREE
36 #define ATOMIC_LONG_LOCK_FREE __CLANG_ATOMIC_LONG_LOCK_FREE
37 #define ATOMIC_LLONG_LOCK_FREE __CLANG_ATOMIC_LLONG_LOCK_FREE
38 #define ATOMIC_POINTER_LOCK_FREE __CLANG_ATOMIC_POINTER_LOCK_FREE
39 
40 /* 7.17.2 Initialization */
41 
42 #define ATOMIC_VAR_INIT(value) (value)
43 #define atomic_init __c11_atomic_init
44 
45 /* 7.17.3 Order and consistency */
46 
47 typedef enum memory_order {
48  memory_order_relaxed = __ATOMIC_RELAXED,
49  memory_order_consume = __ATOMIC_CONSUME,
50  memory_order_acquire = __ATOMIC_ACQUIRE,
51  memory_order_release = __ATOMIC_RELEASE,
52  memory_order_acq_rel = __ATOMIC_ACQ_REL,
53  memory_order_seq_cst = __ATOMIC_SEQ_CST
54 } memory_order;
55 
56 #define kill_dependency(y) (y)
57 
58 /* 7.17.4 Fences */
59 
60 /* These should be provided by the libc implementation. */
61 void atomic_thread_fence(memory_order);
62 void atomic_signal_fence(memory_order);
63 
64 #define atomic_thread_fence(order) __c11_atomic_thread_fence(order)
65 #define atomic_signal_fence(order) __c11_atomic_signal_fence(order)
66 
67 /* 7.17.5 Lock-free property */
68 
69 #define atomic_is_lock_free(obj) __c11_atomic_is_lock_free(sizeof(*(obj)))
70 
71 /* 7.17.6 Atomic integer types */
72 
73 #ifdef __cplusplus
74 typedef _Atomic(bool) atomic_bool;
75 #else
76 typedef _Atomic(_Bool) atomic_bool;
77 #endif
78 typedef _Atomic(char) atomic_char;
79 typedef _Atomic(signed char) atomic_schar;
80 typedef _Atomic(unsigned char) atomic_uchar;
81 typedef _Atomic(short) atomic_short;
82 typedef _Atomic(unsigned short) atomic_ushort;
83 typedef _Atomic(int) atomic_int;
84 typedef _Atomic(unsigned int) atomic_uint;
85 typedef _Atomic(long) atomic_long;
86 typedef _Atomic(unsigned long) atomic_ulong;
87 typedef _Atomic(long long) atomic_llong;
88 typedef _Atomic(unsigned long long) atomic_ullong;
89 typedef _Atomic(uint_least16_t) atomic_char16_t;
90 typedef _Atomic(uint_least32_t) atomic_char32_t;
91 typedef _Atomic(wchar_t) atomic_wchar_t;
92 typedef _Atomic(int_least8_t) atomic_int_least8_t;
93 typedef _Atomic(uint_least8_t) atomic_uint_least8_t;
94 typedef _Atomic(int_least16_t) atomic_int_least16_t;
95 typedef _Atomic(uint_least16_t) atomic_uint_least16_t;
96 typedef _Atomic(int_least32_t) atomic_int_least32_t;
97 typedef _Atomic(uint_least32_t) atomic_uint_least32_t;
98 typedef _Atomic(int_least64_t) atomic_int_least64_t;
99 typedef _Atomic(uint_least64_t) atomic_uint_least64_t;
100 typedef _Atomic(int_fast8_t) atomic_int_fast8_t;
101 typedef _Atomic(uint_fast8_t) atomic_uint_fast8_t;
102 typedef _Atomic(int_fast16_t) atomic_int_fast16_t;
103 typedef _Atomic(uint_fast16_t) atomic_uint_fast16_t;
104 typedef _Atomic(int_fast32_t) atomic_int_fast32_t;
105 typedef _Atomic(uint_fast32_t) atomic_uint_fast32_t;
106 typedef _Atomic(int_fast64_t) atomic_int_fast64_t;
107 typedef _Atomic(uint_fast64_t) atomic_uint_fast64_t;
108 typedef _Atomic(intptr_t) atomic_intptr_t;
109 typedef _Atomic(uintptr_t) atomic_uintptr_t;
110 typedef _Atomic(size_t) atomic_size_t;
111 typedef _Atomic(ptrdiff_t) atomic_ptrdiff_t;
112 typedef _Atomic(intmax_t) atomic_intmax_t;
113 typedef _Atomic(uintmax_t) atomic_uintmax_t;
114 
115 /* 7.17.7 Operations on atomic types */
116 
117 #define atomic_store(object, desired) __c11_atomic_store(object, desired, __ATOMIC_SEQ_CST)
118 #define atomic_store_explicit __c11_atomic_store
119 
120 #define atomic_load(object) __c11_atomic_load(object, __ATOMIC_SEQ_CST)
121 #define atomic_load_explicit __c11_atomic_load
122 
123 #define atomic_exchange(object, desired) __c11_atomic_exchange(object, desired, __ATOMIC_SEQ_CST)
124 #define atomic_exchange_explicit __c11_atomic_exchange
125 
126 #define atomic_compare_exchange_strong(object, expected, desired) __c11_atomic_compare_exchange_strong(object, expected, desired, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
127 #define atomic_compare_exchange_strong_explicit __c11_atomic_compare_exchange_strong
128 
129 #define atomic_compare_exchange_weak(object, expected, desired) __c11_atomic_compare_exchange_weak(object, expected, desired, __ATOMIC_SEQ_CST, __ATOMIC_SEQ_CST)
130 #define atomic_compare_exchange_weak_explicit __c11_atomic_compare_exchange_weak
131 
132 #define atomic_fetch_add(object, operand) __c11_atomic_fetch_add(object, operand, __ATOMIC_SEQ_CST)
133 #define atomic_fetch_add_explicit __c11_atomic_fetch_add
134 
135 #define atomic_fetch_sub(object, operand) __c11_atomic_fetch_sub(object, operand, __ATOMIC_SEQ_CST)
136 #define atomic_fetch_sub_explicit __c11_atomic_fetch_sub
137 
138 #define atomic_fetch_or(object, operand) __c11_atomic_fetch_or(object, operand, __ATOMIC_SEQ_CST)
139 #define atomic_fetch_or_explicit __c11_atomic_fetch_or
140 
141 #define atomic_fetch_xor(object, operand) __c11_atomic_fetch_xor(object, operand, __ATOMIC_SEQ_CST)
142 #define atomic_fetch_xor_explicit __c11_atomic_fetch_xor
143 
144 #define atomic_fetch_and(object, operand) __c11_atomic_fetch_and(object, operand, __ATOMIC_SEQ_CST)
145 #define atomic_fetch_and_explicit __c11_atomic_fetch_and
146 
147 /* 7.17.8 Atomic flag type and operations */
148 
149 typedef struct atomic_flag { atomic_bool _Value; } atomic_flag;
150 
151 #define ATOMIC_FLAG_INIT { 0 }
152 
153 /* These should be provided by the libc implementation. */
154 #ifdef __cplusplus
155 bool atomic_flag_test_and_set(volatile atomic_flag *);
156 bool atomic_flag_test_and_set_explicit(volatile atomic_flag *, memory_order);
157 #else
158 _Bool atomic_flag_test_and_set(volatile atomic_flag *);
159 _Bool atomic_flag_test_and_set_explicit(volatile atomic_flag *, memory_order);
160 #endif
161 void atomic_flag_clear(volatile atomic_flag *);
162 void atomic_flag_clear_explicit(volatile atomic_flag *, memory_order);
163 
164 #define atomic_flag_test_and_set(object) __c11_atomic_exchange(&(object)->_Value, 1, __ATOMIC_SEQ_CST)
165 #define atomic_flag_test_and_set_explicit(object, order) __c11_atomic_exchange(&(object)->_Value, 1, order)
166 
167 #define atomic_flag_clear(object) __c11_atomic_store(&(object)->_Value, 0, __ATOMIC_SEQ_CST)
168 #define atomic_flag_clear_explicit(object, order) __c11_atomic_store(&(object)->_Value, 0, order)
169 
170 #ifdef __cplusplus
171 }
172 #endif
173 
174 #endif /* __STDC_HOSTED__ */
175 #endif /* __CLANG_STDATOMIC_H */
176 
atomic_flag_clear_explicit
#define atomic_flag_clear_explicit(object, order)
Definition: stdatomic.h:168
memory_order_relaxed
@ memory_order_relaxed
Definition: stdatomic.h:48
atomic_flag
Definition: stdatomic.h:149
_Atomic
typedef _Atomic(_Bool) atomic_bool
memory_order
memory_order
Definition: opencl-c-base.h:379
atomic_flag_test_and_set
#define atomic_flag_test_and_set(object)
Definition: stdatomic.h:164
atomic_thread_fence
#define atomic_thread_fence(order)
Definition: stdatomic.h:64
intmax_t
__INTMAX_TYPE__ intmax_t
Definition: stdint.h:262
memory_order_release
@ memory_order_release
Definition: stdatomic.h:51
intptr_t
__INTPTR_TYPE__ intptr_t
A signed integer type with the property that any valid pointer to void can be converted to this type,...
Definition: opencl-c-base.h:117
uintptr_t
__UINTPTR_TYPE__ uintptr_t
An unsigned integer type with the property that any valid pointer to void can be converted to this ty...
Definition: opencl-c-base.h:124
atomic_signal_fence
#define atomic_signal_fence(order)
Definition: stdatomic.h:65
uintmax_t
__UINTMAX_TYPE__ uintmax_t
Definition: stdint.h:263
memory_order_acquire
@ memory_order_acquire
Definition: stdatomic.h:50
stdint.h
memory_order_consume
@ memory_order_consume
Definition: stdatomic.h:49
atomic_flag_clear
#define atomic_flag_clear(object)
Definition: stdatomic.h:167
atomic_flag::_Value
atomic_bool _Value
Definition: stdatomic.h:149
memory_order_seq_cst
@ memory_order_seq_cst
Definition: stdatomic.h:53
memory_order
memory_order
Definition: stdatomic.h:47
atomic_flag
struct atomic_flag atomic_flag
ptrdiff_t
__PTRDIFF_TYPE__ ptrdiff_t
A signed integer type that is the result of subtracting two pointers.
Definition: opencl-c-base.h:110
stddef.h
memory_order_acq_rel
@ memory_order_acq_rel
Definition: stdatomic.h:52
atomic_flag_test_and_set_explicit
#define atomic_flag_test_and_set_explicit(object, order)
Definition: stdatomic.h:165
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