From: Andy Wingo <wingo@pobox.com>
To: Abhijeet More <abhijeet.more@gmail.com>
Cc: guile-user@gnu.org, Tibi Turbureanu <tiberiuturbureanu@gmail.com>
Subject: Re: Implementation of the promise smob
Date: Thu, 19 Aug 2010 21:43:24 -0700 [thread overview]
Message-ID: <m3zkwhsxlf.fsf@unquote.localdomain> (raw)
In-Reply-To: <AANLkTikfC_Bi-ATXJxoW6J7ycOPERxs4Nxa2X+qMKiTO@mail.gmail.com> (Abhijeet More's message of "Thu, 19 Aug 2010 22:10:20 -0400")
On Thu 19 Aug 2010 19:10, Abhijeet More <abhijeet.more@gmail.com> writes:
> Hi,
> I noticed that the implementation of the "promise" smob did not have
> any "mark" function defined.
> This smob does contain a couple of other SCM objects.
>
> Can someone explain how these objects are not cleared up by the gc
> (since nobody marks them as live)?
If you do not provide a mark function, the GC will treat all words in an
object as pointers, and mark them.
The problem, I think, is not that the promise refers to its value: it is
that something is mistakenly referring to the promise (and thence to the
value).
Andy
--
http://wingolog.org/
prev parent reply other threads:[~2010-08-20 4:43 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-08-20 2:10 Implementation of the promise smob Abhijeet More
2010-08-20 4:43 ` Andy Wingo [this message]
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