| Defined in header <stdatomic.h> | ||
|---|---|---|
_Bool atomic_is_lock_free( const volatile A* obj ); | (since C11) |
Determines if the atomic operations on all objects of the type A (the type of the object pointed to by obj) are lock-free. In any given program execution, the result of calling atomic_is_lock_free is the same for all pointers of the same type.
This is a generic function defined for all atomic object types A. The argument is pointer to a volatile atomic type to accept addresses of both non-volatile and volatile (e.g. memory-mapped I/O) atomic variables.
Parameters
| obj | - | pointer to the atomic object to inspect |
Return value
true if the the operations on all objects of the type A are lock-free, false otherwise.
Notes
C11, as published, specified that this function is per-object, not per-type. This was corrected by DR 465.
References
- C11 standard (ISO/IEC 9899:2011):
- 7.17.5.1 The atomic_is_lock_free generic function (p: 280)
See also
| indicates that the given atomic type is lock-free (macro constant) | |
C++ documentation for atomic_is_lock_free | |
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