From: Eli Zaretskii <eliz@gnu.org>
To: Juanma Barranquero <lekktu@gmail.com>
Cc: eggert@cs.ucla.edu, emacs-devel@gnu.org
Subject: Re: Lisp object that refers to a C struct
Date: Thu, 18 Oct 2012 13:17:50 +0200 [thread overview]
Message-ID: <83wqyo1129.fsf@gnu.org> (raw)
In-Reply-To: <CAAeL0SR_we+5Ge-cEZZD7OQohKm=2bnR4dBZ1Ap6rfK0dOtCmQ@mail.gmail.com>
> From: Juanma Barranquero <lekktu@gmail.com>
> Date: Thu, 18 Oct 2012 10:52:21 +0200
> Cc: Paul Eggert <eggert@cs.ucla.edu>, emacs-devel@gnu.org
>
> On Thu, Oct 18, 2012 at 6:50 AM, Eli Zaretskii <eliz@gnu.org> wrote:
>
> > No, because, like Stephen says, the descriptor is first validated
> > against a list of known ones.
>
> In that case, wouldn't it be better to have the integer be an index
> into a table, like Stefan suggested?
It's easy to do that (of course, at a price of some slightly more
complicated memory management), but I think Stefan still prefers the
"new object" solution.
> It's faster to check that it is in range than compare it with an
> arbitrarily long list of known pointers.
That's not what the code does. It calls Fassoc_quit to find the
descriptor in the list of known live watches (which will still be
needed under the table suggestion), and then validates the pointer
itself, just in case (which is also independent of the table
suggestion).
next prev parent reply other threads:[~2012-10-18 11:17 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-15 21:24 Lisp object that refers to a C struct Eli Zaretskii
2012-10-16 1:07 ` Stefan Monnier
2012-10-16 3:53 ` Eli Zaretskii
2012-10-16 13:11 ` Stefan Monnier
2012-10-16 17:22 ` Eli Zaretskii
2012-10-16 21:43 ` Stefan Monnier
2012-10-17 4:05 ` Eli Zaretskii
2012-10-17 6:21 ` Stephen J. Turnbull
2012-10-17 15:50 ` Eli Zaretskii
2012-10-17 17:45 ` Stephen J. Turnbull
2012-10-17 13:34 ` Stefan Monnier
2012-10-17 16:08 ` Eli Zaretskii
2012-10-17 20:23 ` Stefan Monnier
2012-10-17 20:46 ` Eli Zaretskii
2012-10-17 22:08 ` Paul Eggert
2012-10-18 0:22 ` Stefan Monnier
2012-10-18 3:43 ` Stephen J. Turnbull
2012-10-18 4:50 ` Eli Zaretskii
2012-10-18 7:20 ` Paul Eggert
2012-10-18 11:09 ` Eli Zaretskii
2012-10-18 16:42 ` Paul Eggert
2012-10-18 17:21 ` Eli Zaretskii
2012-10-18 8:52 ` Juanma Barranquero
2012-10-18 11:17 ` Eli Zaretskii [this message]
2012-10-18 12:33 ` Stefan Monnier
2012-10-18 17:16 ` Eli Zaretskii
2012-10-18 22:09 ` Stefan Monnier
2012-10-19 7:14 ` Eli Zaretskii
2012-10-19 14:44 ` Stefan Monnier
2012-10-19 18:54 ` Eli Zaretskii
2012-10-19 21:35 ` Stefan Monnier
2012-10-19 22:35 ` Eli Zaretskii
2012-10-20 1:52 ` Stefan Monnier
2012-10-20 8:34 ` Eli Zaretskii
2012-10-17 16:05 ` Eli Zaretskii
2012-10-17 16:59 ` Davis Herring
2012-10-17 20:27 ` Stefan Monnier
2012-10-17 21:02 ` Eli Zaretskii
2012-10-18 0:23 ` Stefan Monnier
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