Re: RE: [COMMITTERS] pgsql/src/backend/access/transam ( xact.c xlog.c)

* Larry Rosenman <ler(at)lerctr(dot)org> [001116 12:09] wrote:
> * Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> [001116 14:02]:
> > > > This sounds like an interesting approach, yes.
> > > Question: Is sleep(0) guaranteed to at least give up control?
> > >
> > > The way I read my UnixWare 7's man page, it might not, since alarm(0)
> > > just cancels the alarm...
> >
> > Well, it certainly is a kernel call, and most OS's re-evaluate on kernel
> > call return.
> BUT, do we know for sure that sleep(0) is not optimized in the library
> to just return?

sleep(3) should conform to POSIX specification, if anyone has the
reference they can check it to see what the effect of sleep(0)
should be.

--
-Alfred Perlstein - [bright(at)wintelcom(dot)net|alfred(at)freebsd(dot)org]
"I have the heart of a child; I keep it in a jar on my desk."