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From: Leo <sdl.web@gmail.com>
To: Andreas Schwab <schwab@linux-m68k.org>
Cc: emacs-devel@gnu.org
Subject: Re: How and when to use GCPRO?
Date: Mon, 27 Dec 2010 10:38:24 +0000	[thread overview]
Message-ID: <m1hbdzijq7.fsf@cam.ac.uk> (raw)
In-Reply-To: <m2bp47bjxz.fsf@whitebox.home> (Andreas Schwab's message of "Mon,  27 Dec 2010 11:15:36 +0100")

On 2010-12-27 10:15 +0000, Andreas Schwab wrote:
> Whenever you call a function that can GC and you are using a reference
> to a Lisp object around that call.
>
> None of the functions you call in your example can GC.
>
> Andreas.

Thanks, Andreas. I'll keep that in mind.

If you pass a Lisp_Object as an argument to a function that does GC but
you don't need to use that object after the call, do you need to GCPRO
it?

For example, in `require' (fns.c line 2976), strictly speaking is
GCPROing `filename' absolutely necessary?

Thanks.
Leo



  reply	other threads:[~2010-12-27 10:38 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-12-27  9:21 How and when to use GCPRO? Leo
2010-12-27 10:15 ` Andreas Schwab
2010-12-27 10:38   ` Leo [this message]
2010-12-27 11:17     ` Andreas Schwab
2010-12-27 16:00   ` Stefan Monnier
2010-12-27 17:51     ` Andreas Schwab
2010-12-28  1:01       ` Stefan Monnier
2010-12-28  1:33         ` Daniel Colascione
2010-12-28  2:17           ` Stefan Monnier
2010-12-28  3:37             ` Daniel Colascione
2010-12-28  4:15               ` Stefan Monnier
2010-12-28  4:36                 ` Conservative scanning (was: Re: How and when to use GCPRO?) Daniel Colascione
2010-12-28 17:07               ` How and when to use GCPRO? Richard Stallman
2010-12-27 19:15     ` Leo
2010-12-27 19:26     ` Common Lisp like feature expressions (was: How and when to use GCPRO?) Leo
2010-12-27 19:38       ` Andreas Schwab
2010-12-27 19:57         ` Leo
2010-12-28  1:01           ` Common Lisp like feature expressions Stefan Monnier
2010-12-28 15:26             ` Leo

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