Re: Re: [PATCH 1/5] Centralize Assert* macros into c.h so its common between backend/frontend

Alvaro Herrera wrote:
> Andres Freund wrote:
> > On 2013-01-18 15:48:01 +0100, Andres Freund wrote:
> > > Here's a trivially updated patch which also defines AssertArg() for
> > > FRONTEND-ish environments since Alvaro added one in xlogreader.c.
> >
> > This time for real. Please.
>
> Here's a different idea: move all the Assert() and StaticAssert() etc
> definitions from c.h and postgres.h into a new header, say pgassert.h.
> That header is included directly by postgres.h (just like palloc.h and
> elog.h already are) so we don't have to touch the backend code at all.
> Frontend programs that want that functionality can just #include
> "pgassert.h" by themselves.  The definitions are (obviously) protected
> by #ifdef FRONTEND so that it all works in both environments cleanly.

One slight problem with this is the common port/*.c idiom would require
an extra include:

#ifndef FRONTEND
#include "postgres.h"
#else
#include "postgres_fe.h"
#include "pgassert.h"        /* <--- new line required here */
#endif /* FRONTEND */

If this is seen as a serious issue (I don't think so) then we would have
to include pgassert.h into postgres_fe.h which would make the whole
thing pointless (i.e. the same as just having the definitions in c.h).

--
Álvaro Herrera                http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services