From: Kenichi Handa <handa@m17n.org>
Cc: emacs-devel@gnu.org
Subject: Re: GC crashes
Date: Mon, 8 Dec 2003 15:05:01 +0900 (JST) [thread overview]
Message-ID: <200312080605.PAA13041@etlken.m17n.org> (raw)
In-Reply-To: <jwvptezopsx.fsf-monnier+emacs/devel@vor.iro.umontreal.ca> (message from Stefan Monnier on 08 Dec 2003 00:16:40 -0500)
In article <jwvptezopsx.fsf-monnier+emacs/devel@vor.iro.umontreal.ca>, Stefan Monnier <monnier@iro.umontreal.ca> writes:
> You said that the value associated with each key is always
> an integer, right? In that case, the value is always
> survive_gc_p, so it will never cause the key&value pair to
> be removed,
??? See this code of sweep_weak_table (in fns.c).
for (idx = HASH_INDEX (h, bucket); !GC_NILP (idx); idx = next)
{
int i = XFASTINT (idx);
int key_known_to_survive_p = survives_gc_p (HASH_KEY (h, i));
int value_known_to_survive_p = survives_gc_p (HASH_VALUE (h, i));
int remove_p;
if (EQ (h->weak, Qkey))
remove_p = !key_known_to_survive_p;
else if (EQ (h->weak, Qvalue))
remove_p = !value_known_to_survive_p;
else if (EQ (h->weak, Qkey_or_value))
remove_p = !(key_known_to_survive_p || value_known_to_survive_p);
else if (EQ (h->weak, Qkey_and_value))
remove_p = !(key_known_to_survive_p && value_known_to_survive_p);
else
abort ();
If h->weak is Qkey, it sets remove_p only by checking
key_known_to_survive_p. So, it seems that wether the value
survives GC or not doesn't matter in this case.
---
Ken'ichi HANDA
handa@m17n.org
next prev parent reply other threads:[~2003-12-08 6:05 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-11-24 10:09 GC crashes Werner LEMBERG
2003-11-26 2:03 ` Kenichi Handa
2003-11-28 9:31 ` [mew-int 01653] " Werner LEMBERG
2003-12-01 12:40 ` [mew-int 01661] " Kenichi Handa
2003-12-02 8:31 ` [mew-int 01666] " Werner LEMBERG
2003-12-02 16:25 ` Stefan Monnier
2003-12-02 23:37 ` [mew-int 01671] " Kenichi Handa
2003-12-03 17:25 ` Stefan Monnier
2003-12-03 23:19 ` Kenichi Handa
2003-12-03 23:58 ` [mew-int 01678] " Stefan Monnier
2003-12-04 0:29 ` Stefan Monnier
2003-12-04 1:12 ` Kenichi Handa
2003-12-04 2:21 ` Kenichi Handa
2003-12-04 15:48 ` Stefan Monnier
2003-12-08 2:31 ` Kenichi Handa
2003-12-08 2:52 ` Stefan Monnier
2003-12-08 5:01 ` Kenichi Handa
2003-12-08 5:16 ` Stefan Monnier
2003-12-08 6:05 ` Kenichi Handa [this message]
2003-12-08 6:25 ` Stefan Monnier
2003-12-08 7:14 ` Kenichi Handa
2003-11-26 14:24 ` Stefan Monnier
2003-12-02 7:01 ` Eli Zaretskii
-- strict thread matches above, loose matches on Subject: below --
2004-12-06 14:32 Items in FOR-RELEASE Stefan
2004-12-06 19:52 ` Juri Linkov
2004-12-06 20:12 ` Stefan Monnier
2004-12-06 21:12 ` Juri Linkov
2004-12-06 21:45 ` Stefan Monnier
2004-12-06 22:47 ` GC crashes (Was: Items in FOR-RELEASE) Juri Linkov
2004-12-07 9:37 ` GC crashes Kim F. Storm
2004-12-07 15:54 ` Paul Pogonyshev
2004-12-07 20:46 ` Jan D.
2004-12-07 20:53 ` Nick Roberts
2004-12-08 0:17 ` Paul Pogonyshev
2004-12-08 6:04 ` Jan D.
2004-12-08 7:31 ` Nick Roberts
2004-12-08 17:39 ` Eli Zaretskii
2004-12-08 19:27 ` Nick Roberts
2004-12-08 22:15 ` Richard Stallman
2005-12-14 21:49 Chong Yidong
2005-12-14 23:18 ` David Kastrup
2005-12-14 23:24 ` Chong Yidong
2005-12-14 23:28 ` David Kastrup
2005-12-17 19:52 ` Chong Yidong
2005-12-18 17:15 ` Richard M. Stallman
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