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Make ftime return wall clock #4

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Make ftime return wall clock #4

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Commits on Feb 22, 2022

  1. Change ftime so it returns wall clock 

    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>
    @StefanJum
    StefanJum committed Feb 22, 2022
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