Re: BUG #16985: ModifyWaitEvent function does not have pgsocket fd and void *user_data arguments

Ok, thanks.

I hope in next release it will be used doubly linked list instead of
WaitEvent c-array

ср, 28 апр. 2021 г. в 06:00, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>:
>
> On Wed, Apr 28, 2021 at 12:28 AM PG Bug reporting form
> <noreply(at)postgresql(dot)org> wrote:
> > The following bug has been logged on the website:
> >
> > Bug reference: 16985
> > Logged by: RekGRpth
> > Email address: rekgrpth(at)gmail(dot)com
> > PostgreSQL version: 13.2
> > Operating system: docker alpine
> > Description:
> >
> > How I can modify WaitEventSet if ModifyWaitEvent function does not have
> > pgsocket fd and void *user_data arguments?
>
> Hi,
>
> This sounds like a topic for the pgsql-hackers mailing list.
>
> The fd and user_data can't be changed currently. Only the set of
> events (wait for read, write, both) or the latch can be changed, and
> you identify which WaitEvent you're talking about by position (see
> return value of AddWaitEventToSet()). Hopefully in the next release,
> we'll be able to remove one fd and add another -- perhaps that's what
> you want to be able to do? I had a proposal like that buried in the
> middle of a whole bunch of related patches at [1], see
> "RemoveWaitEvent", but that piece didn't make it into PostgreSQL 14.