std::atomic_ref::is_lock_free
From cppreference.com
< cpplrm; | atomiclrm; | atomic ref
| bool is_lock_free() const noexcept; |
(since C++20) | |
Checks whether the atomic operations on this object are lock-free.
Parameters
(none)
Return value
true if the atomic operations on this object are lock-free, false otherwise.
Notes
All atomic types except for std::atomic_flag may be implemented using mutexes or other locking operations, rather than using the lock-free atomic CPU instructions. Atomic types are also allowed to be sometimes lock-free, e.g. if only aligned memory accesses are naturally atomic on a given architecture, misaligned objects of the same type have to use locks.
The C++ standard recommends (but does not require) that lock-free atomic operations are also address-free, that is, suitable for communication between processes using shared memory.
Example
| This section is incomplete Reason: no example |
See also
| [static] |
indicates that the type is always lock-free (public static member constant) |