# std::atomic_ref<T>::is_always_lock_free

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< cpp‎ | atomic‎ | atomic ref

static constexpr bool is_always_lock_free = /*implementation-defined*/; |  | (since C++20)

Equals `true` if this operations on this `atomic_ref` type is always lock-free and `false` if it is never or sometimes lock-free.

The value of this constant is consistent with the result of member function is_lock_free.

### See also

is_lock_free | checks if the `atomic_ref` object is lock-free (public member function)

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