197       /**
198        * Atomically increments by one the current value.
199        *
200        * @return the updated value
201        */
202       public final int incrementAndGet() {
203           for (;;) {
204               int current = get();
205               int next = current + 1;
206               if (compareAndSet(current, next))
207                   return next;
208           }
209       }