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std::atomic_ref<T>::fetch_and

From cppreference.com
< cpp‎ | atomic‎ | atomic ref
 
 
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member only of atomic_ref<Integral> specializations
T fetch_and( T arg,
             std::memory_order order = std::memory_order_seq_cst ) const noexcept;
(since C++20)

Atomically replaces the current value of the referenced object with the result of bitwise AND of the value and arg. This operation is a read-modify-write operation. Memory is affected according to the value of order.

[edit] Parameters

arg - the other argument of bitwise AND
order - memory order constraints to enforce

[edit] Return value

The value of the referenced object, immediately preceding the effects of this function.