public void put(Object x) throws InterruptedException {
		lock.lock();
		try {
			while (count == items.length)
				notFull.await();
			items[putptr] = x;
			if (++putptr == items.length)
				putptr = 0;
			++count;
			notEmpty.signal();
		} finally {
			lock.unlock();
		}
	}