# ATOMIC_FLAG_INIT

From cppreference.com
< c‎ | atomic

Defined in header `<stdatomic.h>` |  |
#define ATOMIC_FLAG_INIT /* unspecified */ |  | (since C11)

Expands to an initializer that can be used to initialize atomic_flag type to the clear state. The value `atomic_flag` that is not initialized using this macro is indeterminate.

### Example

    #include <stdatomic.h>

    atomic_flag flag = ATOMIC_FLAG_INIT;

### References

- C17 standard (ISO/IEC 9899:2018):

  - 7.17.1/3 ATOMIC_FLAG_INIT (p: 200)

  - 7.17.8/4 ATOMIC_FLAG_INIT (p: 208)

- 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)(removed in C23) | initializes a new atomic object (function macro)
atomic_flag (C11) | lock-free atomic boolean flag (struct)

Retrieved from "https://en.cppreference.com/mwiki/index.php?title=c/atomic/ATOMIC_FLAG_INIT&oldid=138681"