linux sleeping with clock_nanosleep

Question

I want to use clock_nanosleep for waiting of 1 microsec.. As far as I understand, I have to give an absolute time as input. Is the following code okay in this case?

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Answer 1

As far as I understand, I have to give an absolute time as input.

No, the flags argument allows you to choose relative or absolute time. You want

clock_nanosleep(CLOCK_REALTIME, 0, &deadline, NULL);

to specify one microsecond from now.