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std::experi...r::exchange(3)   C++ Standard Libary  std::experi...r::exchange(3)

NAME
     std::experimental::atomic_weak_ptr::exchange	 -	 std::experimen-
     tal::atomic_weak_ptr::exchange

Synopsis
	weak_ptr<T> exchange( weak_ptr<T> desired, std::memory_order order =
	std::memory_order_seq_cst ) noexcept;

	Atomically replaces the underlying weak_ptr with desired. The  operation
     is a
	read-modify-write  operation.  Memory is affected according to the value
     of order.

Parameters
	desired - value to assign
	order	- memory order constraints to enforce

Return value
	The value of the atomic variable before the call.

	Remarks

	All changes to the atomic_weak_ptr object  itself,  and  all  associated
     use_count
	increments,  are  guaranteed  to  be  performed  atomically.  Associated
     use_count
	decrements take place after the atomic operation, but are  not	required
     to be part of
	it. Any associated destruction or deallocation operations take place af-
     ter the
	atomic operation and are not part of it.

See also
	std::atomic_is_lock_free(std::shared_ptr)
	std::atomic_load(std::shared_ptr)
	std::atomic_load_explicit(std::shared_ptr)
	std::atomic_store(std::shared_ptr)
	std::atomic_store_explicit(std::shared_ptr)			special-
     izes atomic
	std::atomic_exchange(std::shared_ptr)			      operations
     for
	std::atomic_exchange_explicit(std::shared_ptr)
     std::shared_ptr
	std::atomic_compare_exchange_weak(std::shared_ptr)	       (function
     template)
	std::atomic_compare_exchange_strong(std::shared_ptr)
	std::atomic_compare_exchange_weak_explicit(std::shared_ptr)
	std::atomic_compare_exchange_strong_explicit(std::shared_ptr)
	(deprecated in C++20)
	(removed in C++26)

http://cppreference.com 	   2024.06.10	    std::experi...r::exchange(3)
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