private static final long busyOffset;

  static {
    try {
      UNSAFE = getUnsafe();
      Class<?> sk = Striped64.class;
      baseOffset = UNSAFE.objectFieldOffset(sk.getDeclaredField("base"));
      busyOffset = UNSAFE.objectFieldOffset(sk.getDeclaredField("busy"));
    } catch (Exception e) {
      throw new Error(e);
    }
  }

  /**

  private static final long busyOffset;

  static {
    try {
      UNSAFE = getUnsafe();
      Class<?> sk = Striped64.class;
      baseOffset = UNSAFE.objectFieldOffset(sk.getDeclaredField("base"));
      busyOffset = UNSAFE.objectFieldOffset(sk.getDeclaredField("busy"));
    } catch (Exception e) {
      throw new Error(e);
    }
  }

  /**

  private static final long busyOffset;

  static {
    try {
      UNSAFE = getUnsafe();
      Class<?> sk = Striped64.class;
      baseOffset = UNSAFE.objectFieldOffset(sk.getDeclaredField("base"));
      busyOffset = UNSAFE.objectFieldOffset(sk.getDeclaredField("busy"));
    } catch (Exception e) {
      throw new Error(e);
    }
  }

  /**

        WAITERS_OFFSET = unsafe.objectFieldOffset(abstractFuture.getDeclaredField("waiters"));
        LISTENERS_OFFSET = unsafe.objectFieldOffset(abstractFuture.getDeclaredField("listeners"));
        VALUE_OFFSET = unsafe.objectFieldOffset(abstractFuture.getDeclaredField("value"));
        WAITER_THREAD_OFFSET = unsafe.objectFieldOffset(Waiter.class.getDeclaredField("thread"));

     */
    private static final RunnableExecutorPair NULL_PAIR = new RunnableExecutorPair(null, null);

    static {
      try {
        UNSAFE = getUnsafe();
        HEAD_OFFSET = UNSAFE.objectFieldOffset(ExecutionListCAS.class.getDeclaredField("head"));
      } catch (Exception ex) {
        throw new Error(ex);
      }
    }

     */
    private static final RunnableExecutorPair NULL_PAIR = new RunnableExecutorPair(null, null);

    static {
      try {
        UNSAFE = getUnsafe();
        HEAD_OFFSET = UNSAFE.objectFieldOffset(ExecutionListCAS.class.getDeclaredField("head"));
      } catch (Exception ex) {
        throw new Error(ex);
      }
    }