On Tue, Jul 13, 2021 at 12:30 PM Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
>
> Thomas Munro <tmunro(at)postgresql(dot)org> writes:
> > To make \watch react quickly when the user quits the pager or presses
> > ^C, and also to increase the accuracy of its timing and decrease the
> > rate of useless context switches, change the main loop of the \watch
> > command to use sigwait() rather than a sleeping/polling loop, on Unix.
>
> I think this is going to fall over on gaur, which doesn't have POSIX-style
> sigwait. We've escaped dealing with that so far because our only existing
> use of sigwait is hidden under
>
> #if defined(ENABLE_THREAD_SAFETY) && !defined(WIN32)
>
> Perhaps the easiest answer is to make the #if conditional for this
> code look like that too.
Oh, thanks for the advance warning. Wouldn't HAVE_SIGWAIT be better? Like so.