subtract(_:ordering:)
Perform an atomic subtract operation and return the old and new value, applying the specified memory ordering.
Declaration
@discardableResult func subtract(_ operand: Int64, ordering: AtomicUpdateOrdering) -> (oldValue: Int64, newValue: Int64)Parameters
- operand:
An integer value.
- ordering:
The memory ordering to apply on this operation.
Return Value
A tuple containing the original value before the operation and the new value after the operation.