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std::atomic...s_lock_free(3)  C++ Standard Libary std::atomic...s_lock_free(3)

NAME
       std::atomic_ref::is_always_lock_free	 -     std::atomic_ref::is_al-
       ways_lock_free

Synopsis
	  static       constexpr       bool	  is_always_lock_free	     =
       (since C++20)
	  /*implementation-defined*/;

	  Equals  true	if  the	 operations  on	this atomic_ref	type is	always
       lock-free and false
	  if it	is never or sometimes lock-free.

	  The value of this constant is	consistent with	the result  of	member
       function
	  is_lock_free.

See also
	  is_lock_free checks if the atomic_ref	object is lock-free
		       (public member function)

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

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