@Nullable Listener gasListeners(AbstractFutureState<?> future, Listener update) {
      return (Listener) listenersUpdater.getAndSet(future, update);
    }

    @Override
    @Nullable Waiter gasWaiters(AbstractFutureState<?> future, Waiter update) {
      return (Waiter) waitersUpdater.getAndSet(future, update);
    }

    @Override

          public void run() {
            assertFalse("previous tearDown should have run before setUp", setUpRan.getAndSet(true));
          }
        };
    Runnable tearDown =
        new Runnable() {
          @Override
          public void run() {
            assertTrue("setUp should have run", setUpRan.getAndSet(false));
          }
        };
    return MapTestSuiteBuilder.using(new CheckSetUpHashMapGenerator(setUpRan))

   *
   * @param i the index
   * @param newValue the new value
   * @return the previous value
   */
  public final double getAndSet(int i, double newValue) {
    long next = doubleToRawLongBits(newValue);
    return longBitsToDouble(longs.getAndSet(i, next));
  }

  /**
   * Atomically sets the element at position {@code i} to the given updated value if the current

    @Override
    @Nullable Listener gasListeners(AbstractFutureState<?> future, Listener update) {
      return listenersUpdater.getAndSet(future, update);
    }

    @Override
    @Nullable Waiter gasWaiters(AbstractFutureState<?> future, Waiter update) {
      return waitersUpdater.getAndSet(future, update);
    }

    @Override
    boolean casValue(AbstractFutureState<?> future, @Nullable Object expect, Object update) {

        prev = x;
      }
    }
  }

  /** getAndSet returns previous value and sets to given value at given index */
  public void testGetAndSet() {
    AtomicDoubleArray aa = new AtomicDoubleArray(SIZE);
    for (int i : new int[] {0, SIZE - 1}) {
      double prev = 0.0;
      for (double x : VALUES) {
        assertBitEquals(prev, aa.getAndSet(i, x));
        prev = x;
      }
    }
  }

        // not all.  See the test cases for examples on how this can happen.
        try {
          ((Thread) currentRunner).interrupt();
        } finally {
          Runnable prev = getAndSet(DONE);
          if (prev == PARKED) {
            LockSupport.unpark((Thread) currentRunner);
          }
        }
      }
    }
  }

  /**

        while (resultWithDoubleSelfLoop.hasNext()) {
          EndpointPair<N> edge = resultWithDoubleSelfLoop.next();
          if (edge.nodeU().equals(edge.nodeV())) {
            if (!alreadySeenSelfLoop.getAndSet(true)) {
              return edge;
            }
          } else {
            return edge;
          }
        }
        return endOfData();
      }
    };
  }

     * It's called both during normal shutdown and in error conditions.
     */
    private static void destroyContainer() {
        if (running.getAndSet(false)) {
            TimeoutManager.getInstance().stop();
            if (logger.isDebugEnabled()) {
                logger.debug("Destroying LaContainer...");
            }

     * cancelled before the callable started execution.
     */
    SettableFuture<@Nullable Void> newFuture = SettableFuture.create();

    ListenableFuture<@Nullable Void> oldFuture = ref.getAndSet(newFuture);

    // Invoke our task once the previous future completes.
    TrustedListenableFutureTask<T> taskFuture = TrustedListenableFutureTask.create(task);
    oldFuture.addListener(taskFuture, taskExecutor);

     * @param status The current cluster status.
     * @return true if the state has changed, false otherwise.
     */
    public boolean isChangedClusterState(final int status) {
        return previousClusterState.getAndSet(status) != status;
    }

    /**
     * Creates a new action validator.
     *
     * @param requestManager  The request manager.
     * @param messagesCreator The messages creator.