Subj : usage of time() for timeout handling
To   : comp.arch.embedded,comp.programming
From : David
Date : Wed Jul 27 2005 03:10 pm

Hi gurus,
I'm having some modules, that use time() for determine if a given activity
has timed out. As the operating system time will be updated periodically
with the time or the RTC chip, it is possible that the result of two calls
to time() would give a smaller value on the second call. This would cause
the timeout calculation to fail and result in unexpected behaviour.
This situation could specially occour if the user changed the time of the
system! How are you handling this problem? On could use the system tick for
timeout calculations. But somewhere I read that for acuracy reason you
should not do this for longer timeouts. How do you handle this problem?

Thanks in adbance
David

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