From: Andy Wingo <wingo@pobox.com>
To: Mike Gran <spk121@yahoo.com>
Cc: guile-devel <guile-devel@gnu.org>
Subject: Re: rfi: immutable strings
Date: Thu, 27 Jan 2011 17:31:53 +0100 [thread overview]
Message-ID: <m3aaimgveu.fsf@unquote.localdomain> (raw)
In-Reply-To: <245692.94996.qm@web37905.mail.mud.yahoo.com> (Mike Gran's message of "Fri, 7 Jan 2011 10:52:35 -0800 (PST)")
On Fri 07 Jan 2011 19:52, Mike Gran <spk121@yahoo.com> writes:
>> Guile needs immutable strings.
>
> How is this different from read-only strings?
Seems to be the same. We should have read-only string API though;
currently there is only substring API. One should be able to allocate a
read-only string directly, like via
scm_from_static_latin1_{stringn,symboln}. Also, strings loaded from
objcode should be read-only, and share storage with the objcode itself;
perhaps?
>> Also, the result of (symbol->string 'foo) should be immutable;
>> currently symbol->string conses up a new shared substring every time.
Though the result is immutable, it does cons up a shared substring,
which involves all kinds of mutex and allocation shenanigans.
Andy
--
http://wingolog.org/
next prev parent reply other threads:[~2011-01-27 16:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-01-07 18:52 rfi: immutable strings Mike Gran
2011-01-08 21:57 ` Ludovic Courtès
2011-01-27 16:31 ` Andy Wingo [this message]
-- strict thread matches above, loose matches on Subject: below --
2011-01-07 16:57 Andy Wingo
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