如何避免由于Linux中的信号而导致睡眠呼叫中断? [英] How to avoid the interruption of sleep calls due to a signal in Linux?

问题描述

我在Linux中使用实时信号来通知新数据在串行端口中的到达.不幸的是，这会导致有信号时睡眠呼叫被中断.

I'm using a real time signal in Linux to be notified of the arrival of new data in a serial port. Unfortunately this causes sleep calls to be interrupted when there is signal.

有人知道避免这种行为的方法吗?

Does anybody know of a way to avoid this behavior?

我尝试使用常规信号(SIGUSR1)，但仍保持相同的行为.

I tried using a regular signal (SIGUSR1) but I keep getting the same behavior.

推荐答案

来自nanosleep联机帮助页:

From the nanosleep manpage:

nanosleep至少在* req中指定的时间延迟程序的执行.如果已将信号传递到进程，则该函数可以更早返回.在这种情况下，除非rem为NULL，否则它将返回-1，将errno设置为EINTR，并将剩余时间写入rem指向的结构中.然后，可以使用* rem的值再次调用nanosleep并完成指定的暂停.

nanosleep delays the execution of the program for at least the time specified in *req. The function can return earlier if a signal has been delivered to the process. In this case, it returns -1, sets errno to EINTR, and writes the remaining time into the structure pointed to by rem unless rem is NULL. The value of *rem can then be used to call nanosleep again and complete the specified pause.

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