> I need a way to properly determine passage of time
> that is not affected if I change the system clock
> for example.
how about using setitimer(2) - ITIMER_REAL?
since it appears(?) on almost all unix(-like)
platforms this expires based only on callout (or
jiffies) ticks countdown, and settimeofday(2) never
seems to bother adjusting callout queues.
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