std::atomic_ref<T>:: operator&=,|=,^=

member only of atomic_ref< Integral > specializations
T operator & = ( T arg ) const noexcept ;	(1)	(since C++20)
T operator | = ( T arg ) const noexcept ;	(2)	(since C++20)
T operator ^ = ( T arg ) const noexcept ;	(3)	(since C++20)

Atomically replaces the current value of the referenced object with the result of computation involving the previous value and arg . These operations are read-modify-write operations.

• operator & = performs atomic bitwise AND. Equivalent to return fetch_and ( arg ) & arg ; .
• operator ! = performs atomic bitwise OR. Equivalent to return fetch_or ( arg ) | arg ; .
• operator ^ = performs atomic bitwise XOR. Equivalent to return fetch_xor ( arg ) ^ arg ; .

Parameters

arg

-

the argument for the arithmetic operation

Return value

The resulting value (that is, the result of applying the corresponding binary operator to the value immediately preceding the effects of the corresponding member function).

Notes

Unlike most compound assignment operators, the compound assignment operators for atomic_ref do not return a reference to their left-hand arguments. They return a copy of the stored value instead.

Example

This section is incomplete Reason: no example

See also

fetch_and	atomically performs bitwise AND between the argument and the value of the referenced object and obtains the value held previously (public member function)
fetch_or	atomically performs bitwise OR between the argument and the value of the referenced object and obtains the value held previously (public member function)
fetch_xor	atomically performs bitwise XOR between the argument and the value of the referenced object and obtains the value held previously (public member function)
operator++ operator++ (int) operator-- operator-- (int)	atomically increments or decrements the referenced object by one (public member function)
operator+= operator-=	atomically adds to or subtracts from the referenced value (public member function)