最初，处于阻塞状态的端口被识别。
否则当前线程就进入阻塞状态。
保持阻塞状态，直到处理了队列中的所有项目为止。
Blocks until all items in the queue have been gotten and processed.
那些没必要直接和根网桥通信的端口都被置为阻塞状态。
All ports that are not needed to reach the root bridge are placed in blocking mode.
当未完成的任务的总数减少到零时，join() 就会结束阻塞状态。
When the count of unfinished tasks drops to zero, join() unblocks.
返回处于未阻塞状态等待加入任务或其它同步管理的工作线程数的估计值。
Returns an estimate of the number of worker threads that are not blocked waiting to join tasks or for other managed synchronization.
在模块清理过程中，会清理一些特别的工作队列(它们将保持阻塞状态直到处理程序完成对任务的处理)，然后销毁工作队列。
Here, in module cleanup, you flush the particular work queue (which blocks until the handler has completed processing of the work), and then destroy the work queue.
本发明继续对处 于阻塞状态的第一端口（2）解除活动，由此使得通过停用链路连接的第二端口 （1）处于链路断开状态。
The present invention proceeds by deactivating a first port (2) in the blocking state, whereby a second port (1) connected via an inactive link is caused to assume a link-down status.
本发明继续对处 于阻塞状态的第一端口（2）解除活动，由此使得通过停用链路连接的第二端口 （1）处于链路断开状态。
The present invention proceeds by deactivating a first port (2) in the blocking state, whereby a second port (1) connected via an inactive link is caused to assume a link-down status.
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