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poll publicEpoll() Description copied from interface:Queue Retrieves and removes the head of this queue, or returnsnullif this queue is empty. Specified by: pollin interfaceQueue<E> Returns: the head of this queue, ornullif this queue is empty ...
System.nanoTime() + nanos : 0L;//获取当前线程Thread w =Thread.currentThread();intspins = -1;//initialized after first item and cancel checksThreadLocalRandom randomYields =null;//bound if neededfor(;;) {//等待节点的当前数据Object item =s.item;//如果是take和timed poll方法,e为null。也...