From: Stefan Monnier <monnier@iro.umontreal.ca>
To: martin rudalics <rudalics@gmx.at>
Cc: Andreas Schwab <schwab@linux-m68k.org>, emacs-devel@gnu.org
Subject: Re: emacs 24 randomly hanging
Date: Wed, 22 Feb 2012 09:49:35 -0500 [thread overview]
Message-ID: <jwv39a30vwi.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <4F44B84B.5020203@gmx.at> (martin rudalics's message of "Wed, 22 Feb 2012 10:41:31 +0100")
>> There is an invariant that *every* live frame is on Vframe_alist.
>> If that invariant is violated then this is the bug that must
>> be fixed.
> Such an invariant seems obvious but I don't see it neither formulated
> nor preserved.
It's indeed an important invariant.
> And why is Vframe_list "V" prefixed but not available in Lisp?
I don't know why it has a V, but I suspect it's because Vbuffer_alist
also has a "V". As for why it's not available to Lisp, it's
specifically because the above mentioned invariant needs to be preserved
and the C code might break otherwise. Actually, now that I think about
it I have a vague recollection that Vbuffer_alist was exported to Lisp
at some point in the past, and that it later was hidden so as to prevent
Lisp code from breaking the invariant. So if my memory isn't screwing
with me, that would explain Vbuffer_alist's "V".
Stefan
next prev parent reply other threads:[~2012-02-22 14:49 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-19 5:28 emacs 24 randomly hanging Adam
2012-02-19 9:45 ` Adam
2012-02-19 9:54 ` Andreas Schwab
2012-02-20 7:23 ` Adam
2012-02-20 15:34 ` Dan Nicolaescu
2012-02-21 10:10 ` Adam
2012-02-21 10:43 ` Adam
2012-02-21 15:41 ` Dan Nicolaescu
2012-02-21 16:54 ` martin rudalics
2012-02-21 18:42 ` Adam
2012-02-22 8:26 ` martin rudalics
2012-02-22 9:01 ` Andreas Schwab
2012-02-22 9:41 ` martin rudalics
2012-02-22 14:49 ` Stefan Monnier [this message]
2012-02-24 18:43 ` martin rudalics
2012-02-22 10:55 ` Chong Yidong
2012-02-22 16:28 ` Eli Zaretskii
2012-02-23 8:05 ` Chong Yidong
2012-02-23 14:03 ` Christopher Schmidt
2012-02-23 16:39 ` Christopher Schmidt
2012-02-23 17:42 ` Chong Yidong
2012-02-24 18:43 ` martin rudalics
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