ATOMIC_FLAG_INIT

 

C

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Program utilities

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Error handling

Dynamic memory management

Date and time utilities

Strings library

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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 in C17)	initializes a new atomic object (function macro)
atomic_flag (C11)	lock-free atomic boolean flag (struct)