被呼叫的方法一定是位于堆叠中的较高层。
指示指标参数从被呼叫的程序传回到呼叫程序(从伺服器到用户端)。
Indicates that the pointer parameter is returned from the called procedure to the calling procedure (from the server to the client).
接收到信号或被显式的唤醒呼叫唤醒之后,进程将转变为TASK_RUNNING状态。
Once signalled or awoken by explicit wake-up call, the process transitions to TASK_RUNNING.
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