kBool kAtomic64s_CompareExchange	(	kAtomic64s *	atomic,
		k64s	oldValue,
		k64s	value
	)

Conditionally exchanges the value of an atomic variable.

If the atomic value is equal to the oldValue argument, then it is replaced by the value argument.

This method is thread-safe. Implements a full memory barrier.

Parameters

atomic	Pointer to atomic variable.
oldValue	Previous atomic value.
value	New atomic value.

Returns

kTRUE if the exchange succeeded.