ATOMIC_FLAG_FREE
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                    | 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.
[edit] See also
| (C11) | initializes a new atomic object (function macro) | 


