atomic_flag

C

Language

Headers

Type support

Program utilities

Variadic function support

Error handling

Dynamic memory management

Date and time utilities

Strings library

Algorithms

Numerics

Input/output support

Localization support

Atomic operations (C11)

Thread support (C11)

Technical Specifications

Atomic operations library

Types

memory_order

atomic_flag

Macros

ATOMIC_***_LOCK_FREE

ATOMIC_FLAG_INIT

ATOMIC_VAR_INIT

kill_dependency

Functions

atomic_flag_test_and_set

atomic_flag_clear

atomic_init

atomic_is_lock_free

atomic_store

atomic_load

atomic_exchange

atomic_compare_exchange

atomic_fetch_add

atomic_fetch_sub

atomic_fetch_or

atomic_fetch_xor

atomic_fetch_and

atomic_thread_fence

atomic_signal_fence

Defined in header <stdatomic.h>
struct atomic_flag;		(since C11)

atomic_flag is an atomic boolean type. Unlike other atomic types, it is guaranteed to be lock-free. Unlike atomic_bool, atomic_flag does not provide load or store operations.

References

• C11 standard (ISO/IEC 9899:2011):

• 7.17.1/4 atomic_flag (p: 273)

• 7.17.8 Atomic flag type and operations (p: 285-286)

See also

ATOMIC_FLAG_INIT (C11)	initializes a new atomic_flag (macro constant)
atomic_flag_test_and_setatomic_flag_test_and_set_explicit (C11)	sets an atomic_flag to true and returns the old value (function)
atomic_flag_clearatomic_flag_clear_explicit (C11)	sets an atomic_flag to false (function)