From: Stefan Monnier <monnier@iro.umontreal.ca>
To: guile-devel@gnu.org
Subject: Re: Mark procedures and LilyPond
Date: Fri, 06 Nov 2015 10:05:40 -0500 [thread overview]
Message-ID: <jwv611fgohc.fsf-monnier+gmane.lisp.guile.devel@gnu.org> (raw)
In-Reply-To: 87io5ftij0.fsf_-_@netris.org
> __________ __________
> Objects in | | | |
> GC-managed | SMOB 1 | | SMOB 2 |
> heap |__________| |__________|
> | ^ | ^
> .....................|...|.........................|...|..........
> __v___|___ _________ __v___|___
> Objects in | | | STL | | |
> normal heap |C++ object|--->|container|-->|C++ object|
> (not scanned |__________| |_________| |__________|
> by GC)
> The SMOB finalizers free the associated C++ objects below them. Now,
> suppose that none of the objects above are reachable, so both SMOBs are
> queued for finalization. Now suppose that SMOB 2 is finalized first,
> thus freeing the C++ object below it.
It's clearly wrong for SMOB2's finalizer to free its C++ object here
since that object is still reachable from C++ objects.
Stefan
next prev parent reply other threads:[~2015-11-06 15:05 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-04 10:10 Mark procedures Andy Wingo
2015-11-04 12:01 ` Stefan Israelsson Tampe
2015-11-04 17:01 ` Mark procedures, LilyPond, and backward compatibility Mark H Weaver
2015-11-05 10:16 ` Foreign object API Ludovic Courtès
2016-02-01 22:50 ` Foreign objects removed from ‘stable-2.0’ Ludovic Courtès
2015-11-05 14:46 ` Mark procedures, LilyPond, and backward compatibility Andy Wingo
2015-11-05 10:29 ` Mark procedures Ludovic Courtès
2015-11-05 13:11 ` Andy Wingo
2015-11-05 14:17 ` Ludovic Courtès
2015-11-06 12:32 ` Mark procedures and LilyPond Mark H Weaver
2015-11-06 13:50 ` Ludovic Courtès
2015-11-06 15:05 ` Stefan Monnier [this message]
2016-01-24 8:58 ` Hans Åberg
2016-06-20 10:34 ` Mark procedures Andy Wingo
2016-06-20 12:15 ` Ludovic Courtès
2021-05-18 15:46 ` Ephemerons, self-referentality in weak hashtables Christopher Lemmer Webber
2021-06-20 15:01 ` Maxime Devos
2021-06-21 17:15 ` Maxime Devos
2021-09-08 16:18 ` Christine Lemmer-Webber
2021-09-08 20:11 ` Maxime Devos
2021-09-08 20:50 ` Christine Lemmer-Webber
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