They are used when an operation on a message queue deems the process go into a sleep state (i. e. queue is full and the process is waiting for an opening).
他们认为一个消息队列上的操作过程中进入睡眠状态(即队列已满，该进程正在等待开口)时使用。
They are used when an operation on a message queue deems the process go into a sleep state (i. e. queue is full and the process is waiting for an opening).
他们认为一个消息队列上的操作过程中进入睡眠状态(即队列已满，该进程正在等待开口)时使用。
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