Standard library header <stdatomic.h>
From cppreference.com
This header was originally in the C standard library.
This header is part of the concurrency support library.
It is unspecified whether
<stdatomic.h>
provides any declarations in namespace
std
.
Macros |
|
|
(C++23)
|
compatibility macro such that
_Atomic
(
T
)
is identical to
std::
atomic
<
T
>
(function macro) |
|
(C++11)
|
initializes an
std::atomic_flag
to
false
(macro constant) |
Types |
|
|
(C++11)
|
the lock-free boolean atomic type
(class) |
|
(C++11)
|
defines memory ordering constraints for the given atomic operation
(enum) |
|
(C++11)
|
std::
atomic
<
bool
>
(typedef) |
|
(C++11)
|
std::
atomic
<
char
>
(typedef) |
|
(C++11)
|
std::
atomic
<
signed
char
>
(typedef) |
|
(C++11)
|
std::
atomic
<
unsigned
char
>
(typedef) |
|
(C++11)
|
std::
atomic
<
short
>
(typedef) |
|
(C++11)
|
std::
atomic
<
unsigned
short
>
(typedef) |
|
(C++11)
|
std::
atomic
<
int
>
(typedef) |
|
(C++11)
|
std::
atomic
<
unsigned
int
>
(typedef) |
|
(C++11)
|
std::
atomic
<
long
>
(typedef) |
|
(C++11)
|
std::
atomic
<
unsigned
long
>
(typedef) |
|
(C++11)
|
std::
atomic
<
long
long
>
(typedef) |
|
(C++11)
|
std::
atomic
<
unsigned
long
long
>
(typedef) |
|
(C++20)
|
std::
atomic
<
char8_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
char16_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
char32_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
wchar_t
>
(typedef) |
|
(C++11)
(optional)
|
std::
atomic
<
std::
int8_t
>
(typedef) |
|
(C++11)
(optional)
|
std::
atomic
<
std::
uint8_t
>
(typedef) |
|
(C++11)
(optional)
|
std::
atomic
<
std::
int16_t
>
(typedef) |
|
(C++11)
(optional)
|
std::
atomic
<
std::
uint16_t
>
(typedef) |
|
(C++11)
(optional)
|
std::
atomic
<
std::
int32_t
>
(typedef) |
|
(C++11)
(optional)
|
std::
atomic
<
std::
uint32_t
>
(typedef) |
|
(C++11)
(optional)
|
std::
atomic
<
std::
int64_t
>
(typedef) |
|
(C++11)
(optional)
|
std::
atomic
<
std::
uint64_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
int_least8_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
uint_least8_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
int_least16_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
uint_least16_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
int_least32_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
uint_least32_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
int_least64_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
uint_least64_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
int_fast8_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
uint_fast8_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
int_fast16_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
uint_fast16_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
int_fast32_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
uint_fast32_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
int_fast64_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
uint_fast64_t
>
(typedef) |
|
(C++11)
(optional)
|
std::
atomic
<
std::
intptr_t
>
(typedef) |
|
(C++11)
(optional)
|
std::
atomic
<
std::
uintptr_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
size_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
ptrdiff_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
intmax_t
>
(typedef) |
|
(C++11)
|
std::
atomic
<
std::
uintmax_t
>
(typedef) |
Functions |
|
|
(C++11)
|
checks if the atomic type's operations are lock-free
(function template) |
|
(C++11)
(C++11)
|
atomically replaces the value of the atomic object with a non-atomic argument
(function template) |
|
(C++11)
(C++11)
|
atomically obtains the value stored in an atomic object
(function template) |
|
(C++11)
(C++11)
|
atomically replaces the value of the atomic object with non-atomic argument and returns the old value of the atomic
(function template) |
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atomically compares the value of the atomic object with non-atomic argument and performs atomic exchange if equal or atomic load if not
(function template) |
|
|
(C++11)
(C++11)
|
adds a non-atomic value to an atomic object and obtains the previous value of the atomic
(function template) |
|
(C++11)
(C++11)
|
subtracts a non-atomic value from an atomic object and obtains the previous value of the atomic
(function template) |
|
(C++11)
(C++11)
|
replaces the atomic object with the result of bitwise AND with a non-atomic argument and obtains the previous value of the atomic
(function template) |
|
(C++11)
(C++11)
|
replaces the atomic object with the result of bitwise OR with a non-atomic argument and obtains the previous value of the atomic
(function template) |
|
(C++11)
(C++11)
|
replaces the atomic object with the result of bitwise XOR with a non-atomic argument and obtains the previous value of the atomic
(function template) |
|
(C++11)
(C++11)
|
atomically sets the flag to
true
and returns its previous value
(function) |
|
(C++11)
(C++11)
|
atomically sets the value of the flag to
false
(function) |
|
(C++11)
|
generic memory order-dependent fence synchronization primitive
(function) |
|
(C++11)
|
fence between a thread and a signal handler executed in the same thread
(function) |
Synopsis
template<class T> using __std_atomic = std::atomic<T>; // exposition only #define _Atomic(T) __std_atomic<T> #define ATOMIC_BOOL_LOCK_FREE /* see description */ #define ATOMIC_CHAR_LOCK_FREE /* see description */ #define ATOMIC_CHAR16_T_LOCK_FREE /* see description */ #define ATOMIC_CHAR32_T_LOCK_FREE /* see description */ #define ATOMIC_WCHAR_T_LOCK_FREE /* see description */ #define ATOMIC_SHORT_LOCK_FREE /* see description */ #define ATOMIC_INT_LOCK_FREE /* see description */ #define ATOMIC_LONG_LOCK_FREE /* see description */ #define ATOMIC_LLONG_LOCK_FREE /* see description */ #define ATOMIC_POINTER_LOCK_FREE /* see description */ using std::memory_order; // see description using std::memory_order_relaxed; // see description using std::memory_order_consume; // see description using std::memory_order_acquire; // see description using std::memory_order_release; // see description using std::memory_order_acq_rel; // see description using std::memory_order_seq_cst; // see description using std::atomic_flag; // see description using std::atomic_bool; // see description using std::atomic_char; // see description using std::atomic_schar; // see description using std::atomic_uchar; // see description using std::atomic_short; // see description using std::atomic_ushort; // see description using std::atomic_int; // see description using std::atomic_uint; // see description using std::atomic_long; // see description using std::atomic_ulong; // see description using std::atomic_llong; // see description using std::atomic_ullong; // see description using std::atomic_char8_t; // see description using std::atomic_char16_t; // see description using std::atomic_char32_t; // see description using std::atomic_wchar_t; // see description using std::atomic_int8_t; // see description using std::atomic_uint8_t; // see description using std::atomic_int16_t; // see description using std::atomic_uint16_t; // see description using std::atomic_int32_t; // see description using std::atomic_uint32_t; // see description using std::atomic_int64_t; // see description using std::atomic_uint64_t; // see description using std::atomic_int_least8_t; // see description using std::atomic_uint_least8_t; // see description using std::atomic_int_least16_t; // see description using std::atomic_uint_least16_t; // see description using std::atomic_int_least32_t; // see description using std::atomic_uint_least32_t; // see description using std::atomic_int_least64_t; // see description using std::atomic_uint_least64_t; // see description using std::atomic_int_fast8_t; // see description using std::atomic_uint_fast8_t; // see description using std::atomic_int_fast16_t; // see description using std::atomic_uint_fast16_t; // see description using std::atomic_int_fast32_t; // see description using std::atomic_uint_fast32_t; // see description using std::atomic_int_fast64_t; // see description using std::atomic_uint_fast64_t; // see description using std::atomic_intptr_t; // see description using std::atomic_uintptr_t; // see description using std::atomic_size_t; // see description using std::atomic_ptrdiff_t; // see description using std::atomic_intmax_t; // see description using std::atomic_uintmax_t; // see description using std::atomic_is_lock_free; // see description using std::atomic_load; // see description using std::atomic_load_explicit; // see description using std::atomic_store; // see description using std::atomic_store_explicit; // see description using std::atomic_exchange; // see description using std::atomic_exchange_explicit; // see description using std::atomic_compare_exchange_strong; // see description using std::atomic_compare_exchange_strong_explicit; // see description using std::atomic_compare_exchange_weak; // see description using std::atomic_compare_exchange_weak_explicit; // see description using std::atomic_fetch_add; // see description using std::atomic_fetch_add_explicit; // see description using std::atomic_fetch_sub; // see description using std::atomic_fetch_sub_explicit; // see description using std::atomic_fetch_or; // see description using std::atomic_fetch_or_explicit; // see description using std::atomic_fetch_xor; // see description using std::atomic_fetch_xor_explicit; // see description using std::atomic_fetch_and; // see description using std::atomic_fetch_and_explicit; // see description using std::atomic_flag_test_and_set; // see description using std::atomic_flag_test_and_set_explicit; // see description using std::atomic_flag_clear; // see description using std::atomic_flag_clear_explicit; // see description #define ATOMIC_FLAG_INIT /* see description */ using std::atomic_thread_fence; // see description using std::atomic_signal_fence; // see description