implements BlockingQueue<E> {

  // Based on revision 1.58 of ArrayBlockingQueue by Doug Lea, from
  // http://gee.cs.oswego.edu/cgi-bin/viewcvs.cgi/jsr166/src/main/java/util/concurrent/

  /** The queued items */
  final E[] items;
  /** items index for next take, poll or remove */
  int takeIndex;
  /** items index for next put, offer, or add. */
  int putIndex;
  /** Number of items in the queue */

    implements BlockingQueue<E> {

  // Based on revision 1.58 of ArrayBlockingQueue by Doug Lea, from
  // http://gee.cs.oswego.edu/cgi-bin/viewcvs.cgi/jsr166/src/main/java/util/concurrent/

  /** The queued items */
  final E[] items;
  /** items index for next take, poll or remove */
  int takeIndex;
  /** items index for next put, offer, or add. */
  int putIndex;
  /** Number of items in the queue */

   * Queue#isEmpty} and {@link Queue#remove()}, since {@link Queue}'s iteration order is undefined.
   * Calling {@link Iterator#hasNext()} on a generated iterator from the returned iterable may cause
   * an item to be immediately dequeued for return on a subsequent call to {@link Iterator#next()}.
   *
   * <p>Whether the input {@code iterable} is a {@link Queue} or not, the returned {@code Iterable}
   * is not thread-safe.
   *

    /**
     * Used to update and read the latestTaskQueue field. Set to null once the runnable has been run
     * or queued.
     */
    @CheckForNull ExecutionSequencer sequencer;

    /**
     * Executor the task was set to run on. Set to null when the task has been queued, run, or
     * cancelled.
     */
    @CheckForNull Executor delegate;

    /**

              protected void finalize() {
                finalizerRan.countDown();
              }
            });

    await(finalizerRan);
    awaitClear(ref);

    // Hope to catch some stragglers queued up behind our finalizable object
    System.runFinalization();
  }

  private static RuntimeException formatRuntimeException(String format, Object... args) {