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std::atomic::fetch_xor(3)     C++ Standard Libary    std::atomic::fetch_xor(3)

NAME
       std::atomic::fetch_xor -	std::atomic::fetch_xor

Synopsis
	  T fetch_xor( T arg,
	  std::memory_order order =			     (since C++11)
	  std::memory_order_seq_cst  )	noexcept;	       (member only of
       atomic<Integral>
	  T fetch_xor( T arg,				     template special-
       ization)
	  std::memory_order order =
	  std::memory_order_seq_cst ) volatile noexcept;

	  Atomically replaces the current value	with the result	of bitwise XOR
       of the value
	  and arg. The operation is read-modify-write operation. Memory	is af-
       fected according
	  to the value of order.

	  The	  volatile-qualified	 version     is	    deprecated	    if
       (since C++20)
	  std::atomic<T>::is_always_lock_free is false.

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

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

See also
	  atomic_fetch_xor	    replaces the atomic	object with the	result
       of bitwise XOR
	  atomic_fetch_xor_explicit with a non-atomic argument and obtains the
       previous	value
	  (C++11)		    of the atomic
	  (C++11)		    (function template)

http://cppreference.com		  2022.07.31	     std::atomic::fetch_xor(3)

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