Atomic operations library
From cppreference.com
< c
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> | |
| indicates that the given atomic type is lock-free (macro constant) | |
| (C11) |
initializes a new atomic_flag (macro constant) |
| (C11) |
initializes a new atomic object (function macro) |
| (C11) |
breaks a dependency chain for memory_order_consume (function macro) |
Functions
| Defined in header
<stdatomic.h> | |
| sets an atomic_flag to true and returns the old value (function) | |
| sets an atomic_flag to false (function) | |
| (C11) |
initializes an existing atomic object (function) |
| (C11) |
indicates whether the atomic object is lock-free (function) |
| stores a value in an atomic object (function) | |
| reads a value from an atomic object (function) | |
| swaps a value with the value of an atomic object (function) | |
| swaps a value with the an atomic object if the old value is what is expected, otherwise reads the old value (function) | |
| atomic addition (function) | |
| atomic subtraction (function) | |
| atomic logical OR (function) | |
| atomic logical exclusive OR (function) | |
| atomic logical 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
|