ATOMIC_FLAG_INIT

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>
#define ATOMIC_FLAG_INIT /* unspecified */		(since C11)

Expands to an expression that can be used to initialize atomic_flag type. The value atomic_flag that is not initialized using this macro is undefined.

Example

Run this code

#include <stdatomic.h>

atomic_flag flag = ATOMIC_FLAG_INIT;

References

• C11 standard (ISO/IEC 9899:2011):

• 7.17.1/3 ATOMIC_FLAG_INIT (p: 273)

• 7.17.8/4 ATOMIC_FLAG_INIT (p: 285)

See also

ATOMIC_VAR_INIT (C11)(deprecated)	initializes a new atomic object (function macro)
atomic_flag (C11)	lock-free atomic boolean flag (struct)