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Standard library header <stdatomic.h> (C++23)

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Standard library headers
 

This header was originally in the C standard library (<stdatomic.h>).

This header is part of the concurrency support library.

It is unspecified whether <stdatomic.h> provides any declarations in namespace std.

Contents

Macros

(C++23)
compatibility macro such that _Atomic(T) is identical to std::atomic <T>
(function macro) [edit]
initializes an std::atomic_flag to false
(macro constant) [edit]

Types

(C++11)
the lock-free boolean atomic type
(class) [edit]
defines memory ordering constraints for the given atomic operation
(enum) [edit]
(C++11)
std::atomic <bool>
(typedef) [edit]
(C++11)
std::atomic <char>
(typedef) [edit]
std::atomic <signed char>
(typedef) [edit]
std::atomic <unsigned char>
(typedef) [edit]
std::atomic <short>
(typedef) [edit]
std::atomic <unsigned short>
(typedef) [edit]
(C++11)
std::atomic <int>
(typedef) [edit]
(C++11)
std::atomic <unsigned int>
(typedef) [edit]
(C++11)
std::atomic <long>
(typedef) [edit]
std::atomic <unsigned long>
(typedef) [edit]
std::atomic <long long>
(typedef) [edit]
std::atomic <unsigned long long>
(typedef) [edit]
std::atomic <char8_t>
(typedef) [edit]
std::atomic <char16_t>
(typedef) [edit]
std::atomic <char32_t>
(typedef) [edit]
std::atomic <wchar_t>
(typedef) [edit]
(C++11)(optional)
std::atomic <std::int8_t >
(typedef) [edit]
(C++11)(optional)
std::atomic <std::uint8_t >
(typedef) [edit]
(C++11)(optional)
std::atomic <std::int16_t >
(typedef) [edit]
(C++11)(optional)
std::atomic <std::uint16_t >
(typedef) [edit]
(C++11)(optional)
std::atomic <std::int32_t >
(typedef) [edit]
(C++11)(optional)
std::atomic <std::uint32_t >
(typedef) [edit]
(C++11)(optional)
std::atomic <std::int64_t >
(typedef) [edit]
(C++11)(optional)
std::atomic <std::uint64_t >
(typedef) [edit]
std::atomic <std::int_least8_t >
(typedef) [edit]
std::atomic <std::uint_least8_t >
(typedef) [edit]
std::atomic <std::int_least16_t >
(typedef) [edit]
std::atomic <std::uint_least16_t >
(typedef) [edit]
std::atomic <std::int_least32_t >
(typedef) [edit]
std::atomic <std::uint_least32_t >
(typedef) [edit]
std::atomic <std::int_least64_t >
(typedef) [edit]
std::atomic <std::uint_least64_t >
(typedef) [edit]
std::atomic <std::int_fast8_t >
(typedef) [edit]
std::atomic <std::uint_fast8_t >
(typedef) [edit]
std::atomic <std::int_fast16_t >
(typedef) [edit]
std::atomic <std::uint_fast16_t >
(typedef) [edit]
std::atomic <std::int_fast32_t >
(typedef) [edit]
std::atomic <std::uint_fast32_t >
(typedef) [edit]
std::atomic <std::int_fast64_t >
(typedef) [edit]
std::atomic <std::uint_fast64_t >
(typedef) [edit]
(C++11)(optional)
std::atomic <std::intptr_t >
(typedef) [edit]
(C++11)(optional)
std::atomic <std::uintptr_t >
(typedef) [edit]
std::atomic <std::size_t >
(typedef) [edit]
std::atomic <std::ptrdiff_t >
(typedef) [edit]
std::atomic <std::intmax_t >
(typedef) [edit]
std::atomic <std::uintmax_t >
(typedef) [edit]

Functions

checks if the atomic type's operations are lock-free
(function template) [edit]
atomically replaces the value of the atomic object with a non-atomic argument
(function template) [edit]
atomically obtains the value stored in an atomic object
(function template) [edit]
atomically replaces the value of the atomic object with non-atomic argument and returns the old value of the atomic
(function template) [edit]
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) [edit]
adds a non-atomic value to an atomic object and obtains the previous value of the atomic
(function template) [edit]
subtracts a non-atomic value from an atomic object and obtains the previous value of the atomic
(function template) [edit]
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) [edit]
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) [edit]
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) [edit]
atomically sets the flag to true and returns its previous value
(function) [edit]
atomically sets the value of the flag to false
(function) [edit]
generic memory order-dependent fence synchronization primitive
(function) [edit]
fence between a thread and a signal handler executed in the same thread
(function) [edit]

[edit] 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
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