Atomic operations library
If the macro constant __STDC_NO_ATOMICS__
(C11) is defined by the compiler, the header <stdatomic.h>
, the keyword _Atomic
, and all of the names listed here are not provided.
Types
Defined in header <stdatomic.h> |
|
---|---|
(C11)
|
defines memory ordering constraints (enum) |
(C11)
|
lock-free atomic boolean flag (struct) |
Macros
Defined in header <stdatomic.h> |
|
---|---|
(C11)
|
indicates that the given atomic type is lock-free (macro constant) |
(C11)
|
initializes a new atomic_flag (macro constant) |
(C11)(deprecated in C17)
|
initializes a new atomic object (function macro) |
(C11)
|
breaks a dependency chain for memory_order_consume (function macro) |
Functions
Defined in header <stdatomic.h> |
|
---|---|
(C11)
|
sets an atomic_flag to true and returns the old value (function) |
(C11)
|
sets an atomic_flag to false (function) |
(C11)
|
initializes an existing atomic object (function) |
(C11)
|
indicates whether the atomic object is lock-free (function) |
(C11)
|
stores a value in an atomic object (function) |
(C11)
|
reads a value from an atomic object (function) |
(C11)
|
swaps a value with the value of an atomic object (function) |
(C11)
|
swaps a value with an atomic object if the old value is what is expected, otherwise reads the old value (function) |
(C11)
|
atomic addition (function) |
(C11)
|
atomic subtraction (function) |
(C11)
|
atomic bitwise OR (function) |
(C11)
|
atomic bitwise exclusive OR (function) |
(C11)
|
atomic bitwise AND (function) |
(C11)
|
generic memory order-dependent fence synchronization primitive (function) |
(C11)
|
fence between a thread and a signal handler executed in the same thread (function) |
Types
The standard library offers convenience typedefs for the core language atomic types.
Typedef name | Full type name |
---|---|
atomic_bool |
_Atomic _Bool |
atomic_char |
_Atomic char |
atomic_schar |
_Atomic signed char |
atomic_uchar |
_Atomic unsigned char |
atomic_short |
_Atomic short |
atomic_ushort |
_Atomic unsigned short |
atomic_int |
_Atomic int |
atomic_uint |
_Atomic unsigned int |
atomic_long |
_Atomic long |
atomic_ulong |
_Atomic unsigned long |
atomic_llong |
_Atomic long long |
atomic_ullong |
_Atomic unsigned long long |
atomic_char16_t |
_Atomic char16_t |
atomic_char32_t |
_Atomic char32_t |
atomic_wchar_t |
_Atomic wchar_t |
atomic_int_least8_t |
_Atomic int_least8_t |
atomic_uint_least8_t |
_Atomic uint_least8_t |
atomic_int_least16_t |
_Atomic int_least16_t |
atomic_uint_least16_t |
_Atomic uint_least16_t |
atomic_int_least32_t |
_Atomic int_least32_t |
atomic_uint_least32_t |
_Atomic uint_least32_t |
atomic_int_least64_t |
_Atomic int_least64_t |
atomic_uint_least64_t |
_Atomic uint_least64_t |
atomic_int_fast8_t |
_Atomic int_fast8_t |
atomic_uint_fast8_t |
_Atomic uint_fast8_t |
atomic_int_fast16_t |
_Atomic int_fast16_t |
atomic_uint_fast16_t |
_Atomic uint_fast16_t |
atomic_int_fast32_t |
_Atomic int_fast32_t |
atomic_uint_fast32_t |
_Atomic uint_fast32_t |
atomic_int_fast64_t |
_Atomic int_fast64_t |
atomic_uint_fast64_t |
_Atomic uint_fast64_t |
atomic_intptr_t |
_Atomic intptr_t |
atomic_uintptr_t |
_Atomic uintptr_t |
atomic_size_t |
_Atomic size_t |
atomic_ptrdiff_t |
_Atomic ptrdiff_t |
atomic_intmax_t |
_Atomic intmax_t |
atomic_uintmax_t |
_Atomic uintmax_t |
References
- C11 standard (ISO/IEC 9899:2011):
- 7.17 Atomics <stdatomic.h> (p: 273-286)
- 7.31.8 Atomics <stdatomic.h> (p: 455-456)
See also
C++ documentation for Atomic operations library |
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