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Re: C exception code

From: Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>
To: Giles Lean <giles(at)nemeton(dot)com(dot)au>
Cc: PostgreSQL-development <pgsql-hackers(at)postgreSQL(dot)org>
Subject: Re: C exception code
Date: 2000-06-26 21:34:48
Message-ID: 200006262134.RAA01035@candle.pha.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Oh, well.  At least I asked.  :-)


> 
> > Are we interested in adding Try/Catch exception code to PostgreSQL. 
> > This looks interesting:
> > 
> > 	http://www.cs.berkeley.edu/~amc/cexcept/
> 
> IMHO using the C pre-processor to make C look like some other language:
> 
> - makes the code harder to read as readers have to learn the dialect
>   first
> 
> - makes the code harder to debug, since debugging tools don't know the
>   dialect but only the C it is translated into
> 
> This exception implementation has the obvious(?) problem of using
> setjump()/longjmp() where sigsetjmp()/siglongjmp() would probably be
> necessary for postgresql.
> 
> There are places too where this implementation would just plain not
> work and so couldn't be used: setjmp(), longjmp(), sigsetjump(), and
> siglongjmp() are not async safe signal functions and so can't be
> called in signal handlers, for a start.
> 
> Regards,
> 
> Giles
> 
> 
> 
> 


-- 
  Bruce Momjian                        |  http://www.op.net/~candle
  pgman(at)candle(dot)pha(dot)pa(dot)us               |  (610) 853-3000
  +  If your life is a hard drive,     |  830 Blythe Avenue
  +  Christ can be your backup.        |  Drexel Hill, Pennsylvania 19026

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