std::atomic_ref<T>::is_lock_free (3) - Linux Manuals

std::atomic_ref<T>::is_lock_free: std::atomic_ref<T>::is_lock_free


std::atomic_ref<T>::is_lock_free - std::atomic_ref<T>::is_lock_free


bool is_lock_free() const noexcept; (since C++20)

Checks whether the atomic operations on this object are lock-free.



Return value

true if the atomic operations on this object are lock-free, false otherwise.


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.


 This section is incomplete
 Reason: no example

See also

is_always_lock_free indicates that the type is always lock-free
                    (public static member constant)