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
| 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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