Make ftime return wall clock #4
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Return wall clock on calling `ftime`, since the function is used in `pte_relmillisecs` to find the time offset as milliseconds from the current system time. `pte_relmillisecs` returns timeout as milliseconds from current system time, got by calling `ftime`. `sem_timedwait` calculates the time offset using `pte_relmillisecs` and then waits in a loop. Using monotonic time results in a wrong offset when using `sem_timedwait` that makes the `abstime` argument be interpreted as a relative offset to the monotonic clock start, not as an absolute value since epoch. Signed-off-by: Stefan Jumarea <stefanjumarea02@gmail.com>
adinasm
approved these changes
May 25, 2022
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Looks good, seems like the bug is gone now.
Reviewed-by: Adina Smeu adina.smeu@gmail.com
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The problem was discussed here.
Return wall clock on calling
ftime, since thefunction is used in
pte_relmillisecsto findthe time offset as milliseconds from the current
system time.
pte_relmillisecsreturns timeout as millisecondsfrom current system time, got by calling
ftimehere.sem_timedwaitcalculates the time offset usingpte_relmillisecshere and then waits in a loop.Using monotonic time results in a wrong offset
when using
sem_timedwaitthat makes theabstimeargument be interpreted as a relative offset to
the monotonic clock start, not as an absolute value
since epoch.
Signed-off-by: Stefan Jumarea stefanjumarea02@gmail.com