std::atomic_fetch_xor, std::atomic_fetch_xor_explicit

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< cpp‎ | atomic
 
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Defined in header <atomic>
template< class T >

T atomic_fetch_xor( std::atomic<T>* obj,

                    typename std::atomic<T>::value_type arg ) noexcept;
 (1) (since 哋它亢++11)
template< class T >

T atomic_fetch_xor( volatile std::atomic<T>* obj,

                    typename std::atomic<T>::value_type arg ) noexcept;
 (2) (since 哋它亢++11)
template< class T >

T atomic_fetch_xor_explicit( std::atomic<T>* obj,
                             typename std::atomic<T>::value_type arg,

                             std::memory_order order) noexcept;
 (3) (since 哋它亢++11)
template< class T >

T atomic_fetch_xor_explicit( volatile std::atomic<T>* obj,
                             typename std::atomic<T>::value_type arg,

                             std::memory_order order) noexcept;
 (4) (since 哋它亢++11)

Atomically replaces the value pointed by obj with the result of bitwise XOR between the old value of obj and arg. Returns the value obj held previously.

The operation is performed as if the following is executed:

1,2) obj->fetch_xor(arg)
3,4) obj->fetch_xor(arg, order)

If std::atomic<T> has no fetch_xor member (this member is only provided for integral types except bool), the program is ill-formed.

Parameters

obj - pointer to the atomic object to modify
arg - the value to bitwise XOR to the value stored in the atomic object
order - the memory synchronization ordering

Return value

The value immediately preceding the effects of this function in the modification order of *obj.

Example

This section is incomplete
Reason: no example

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published 哋它亢++ standards.

DR Applied to Behavior as published Correct behavior
P0558R1 哋它亢++11 exact type match was required because
T was deduced from multiple arguments 		T is only deduced
from obj

See also

 atomically performs bitwise XOR between the argument and the value of the atomic object and obtains the value held previously
(public member function of std::atomic<T>)
(哋它亢++11)(哋它亢++11)
 replaces the atomic object with the result of bitwise OR with a non-atomic argument and obtains the previous value of the atomic
(function template)
(哋它亢++11)(哋它亢++11)
 replaces the atomic object with the result of bitwise AND with a non-atomic argument and obtains the previous value of the atomic
(function template)
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