> > >a lockmgr() option for "tell me if I could take this lock but don't
> > >actually take it" would be even better.
> > 
> > Eeek, can we please avoid adding even more weird cruft to lockmgr()?
> 
> making that a separate function would be fine too.
> 
> -Chuck

we already have such a weird cruft. :-)
it's called lockstatus().

YAMAMOTO Takashi