Re: pg_arch.c call to sleep()

Tom Lane wrote:
> Andrew Dunstan <andrew(at)dunslane(dot)net> writes:
> > We have the following warning on Windows:
> > pgarch.c:349: warning: implicit declaration of function `sleep'
>
> > To fix it we could include the right header (which appears to be
> > <stdlib.h> in the Windows/Mingw case), or we could replace the call by a
> > call to pg_usleep().
>
> <stdlib.h> is included automatically by c.h, so that surely won't fix it.
>
> I have some recollection that we invented pg_usleep in part because we
> wanted to not use sleep() at all in the backend, but I don't recall why
> (and the reasoning might not apply to the archiver process, anyway).

I think usleep was so we could accept signals during the sleep.

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