| From: | Alvaro Herrera <alvherre(at)commandprompt(dot)com> |
|---|---|
| To: | Peter Eisentraut <peter_e(at)gmx(dot)net> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-patches(at)postgresql(dot)org, Bruce Momjian <bruce(at)momjian(dot)us> |
| Subject: | Re: execl() sentinel |
| Date: | 2007-07-18 15:16:17 |
| Message-ID: | 20070718151617.GE6651@alvh.no-ip.org |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-patches |
Peter Eisentraut wrote:
> Am Mittwoch, 18. Juli 2007 16:16 schrieb Tom Lane:
> > You should *not* have to inform the machine that NULL is a pointer.
>
> For variadic functions, that expectation is invalid, AFAIK.
No, what's invalid is that using an unadorned 0 is understood as a "null
pointer" by the compiler. That would happen in a lot of places except
on a variadic function.
However, the platform may define NULL as it wishes, and indeed in our
c.h it is defined (conditionally) as (void *)0. If the platform had
such a definition then it would work without issues.
I assume the platform in question does something like
#define NULL 0
which would be silly.
--
Alvaro Herrera http://www.advogato.org/person/alvherre
"El conflicto es el camino real hacia la unión"
| From | Date | Subject | |
|---|---|---|---|
| Next Message | Peter Eisentraut | 2007-07-18 15:25:00 | Re: execl() sentinel |
| Previous Message | Bruce Momjian | 2007-07-18 15:04:28 | Re: docfix - DELETE doesn't affect auto-analyze |