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From: Dmitry Antipov <dmantipov@yandex.ru>
To: Emacs development discussions <emacs-devel@gnu.org>
Subject: Objects layout and tagging scheme
Date: Thu, 02 Aug 2012 20:10:20 +0400	[thread overview]
Message-ID: <501AA66C.2030507@yandex.ru> (raw)

Any non-trivial GC design which I can imagine requires extra per-object information.
It may be just a few bits, bit this is a problem anyway because some objects
(conses at first) has no free space already so their mark bits are allocated
from separate bitmaps. Symbols and misc objects are free from these problems,
but vectors and string are affected. So I would like to raise the following
question: if I need, for example, 2 extra bits for each object, where to get them?

Dmitry





             reply	other threads:[~2012-08-02 16:10 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-08-02 16:10 Dmitry Antipov [this message]
2012-08-02 18:09 ` Objects layout and tagging scheme Paul Eggert
2012-08-03  8:17   ` Dmitry Antipov
2012-08-03 23:10     ` Stefan Monnier
2012-08-03  9:49 ` Stefan Monnier

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