public final int updateAndGet ( T obj , IntUnaryOperator updateFunction ) { int prev , next ; do { prev = get ( obj ) ; next = updateFunction . applyAsInt ( prev ) ; } while ( ! compareAndSet ( obj , prev , next ) ) ; return next ; }
Atomically updates the field of the given object managed by this updater with the results of applying the given function returning the updated value . The function should be side - effect - free since it may be re - applied when attempted updates fail due to contention among threads .