Re: pg_usleep for multisecond delays

On Fri, Feb 10, 2023 at 10:18:34AM -0500, Tom Lane wrote:
> Robert Haas <robertmhaas(at)gmail(dot)com> writes:
>> I wonder if we should have a wrapper around WaitLatch() that documents
>> that if the latch is set before the time expires, it will reset the
>> latch and try again to wait for the remaining time, after checking for
>> interrupts etc.
>
> Resetting the latch seems not very friendly for general-purpose use
> ... although I guess we could set it again on the way out.
>
> BTW, we have an existing pg_sleep() function that deals with all
> of this except re-setting the latch.

That seems workable. I think it might also need to accept a function
pointer for custom interrupt checking (e.g., archiver code should use
HandlePgArchInterrupts()). I'll put something together if that sounds
alright.

--
Nathan Bossart
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