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Re: Console client plug-in options
From: |
Marcus Brinkmann |
Subject: |
Re: Console client plug-in options |
Date: |
Fri, 8 Aug 2003 19:55:51 +0200 |
User-agent: |
Mutt/1.5.4i |
On Fri, Aug 08, 2003 at 02:06:13PM +0200, Jeroen Dekkers wrote:
> On Thu, Aug 07, 2003 at 11:48:41PM +0200, Marco Gerards wrote:
> > Already tried to use an argp parser, and that worked. Unfortunately
> > there were issues with the argp parser, argp isn't reentrant. (I guess
> > I was lucky when I used it).
>
> Hmm, I don't see a reason why this wouldn't work. The problem is when
> different threads use argp at the same time, but this can't happen
> with the locks protecting argp. These locks are recursive, recursively
> calling argp doesn't cause a deadlock.
The comment in argp-parse.c is:
If we can, we regulate access to getopt, which is non-reentrant, with a
mutex. Since the case we're trying to guard against is two different
threads interfering, and it's possible that someone might want to call
argp_parse recursively (they're careful), we use a recursive lock if
possible.
I wonder what this "they're careful" means.
Thanks,
Marcus
--
`Rhubarb is no Egyptian god.' GNU http://www.gnu.org marcus@gnu.org
Marcus Brinkmann The Hurd http://www.gnu.org/software/hurd/
Marcus.Brinkmann@ruhr-uni-bochum.de
http://www.marcus-brinkmann.de/