throws InterruptedException {
    boolean firstTime = true;
    try {
      do {
        if (nanos <= 0L) {
          return false;
        }
        if (firstTime) {
          if (signalBeforeWaiting) {
            signalNextWaiter();
          }
          beginWaitingFor(guard);
          firstTime = false;
        }
        nanos = guard.condition.awaitNanos(nanos);