ATOMIC_*_LOCK_FREE
From cppreference.com
| Defined in header <stdatomic.h>
|
||
| #define ATOMIC_BOOL_LOCK_FREE /* implementation-defined */ #define ATOMIC_CHAR_LOCK_FREE /* implementation-defined */ |
(since C11) | |
Expands to preprocessor constant expressions that evaluate to either 0, 1, or 2 which indicate the lock-free property of the corresponding atomic types (both signed and unsigned).
| Value | Explanation |
0
|
The atomic type is never lock-free |
1
|
The atomic type is sometimes lock-free |
2
|
The atomic type is always lock-free |
[edit] References
- C11 standard (ISO/IEC 9899:2011):
- 7.17.1/3 atomic lock-free macros (p: 273)
