From: "Julian Graham" <joolean@gmail.com>
To: guile-devel@gnu.org
Subject: srfi-18 requirements
Date: Wed, 10 Oct 2007 21:54:37 -0400 [thread overview]
Message-ID: <2bc5f8210710101854m1254160ei451026182b87e767@mail.gmail.com> (raw)
Hi guys,
While I was waiting to get my copyright assignment sorted out, I
started trying to figure out what it would take to add SRFI-18
(http://srfi.schemers.org/srfi-18/srfi-18.html) support to Guile. I
think a lot of it can be safely done in Scheme (mostly by mapping the
SRFI's proposed API onto what's already in Guile), but there are a few
things that'd require further modification to the C core.
Specifically:
* Type predicates: thread?, mutex?, and condition-variable?.
* Mutex state: This kind of needs to happen in C, since we need to
hook the actual lock / unlock calls in order to record the state
changes.
* Mutex unlocking outside the owner thread: The existing
implementation claims the result of doing this is undefined, but what
it actually does is mark the mutex unlocked and then throw an
exception. I don't really think there's a technical reason to
prohibit this, especially since Guile doesn't use the pthreads mutex
implementation directly.
* Mutex lock timeout: Not really sure how to do this -- maybe add a
pthreads condition variable to the definition of fat_mutex.
Supporting this with the existing lock-mutex code would also require a
breaking change to the C API, and I don't know what the conditions are
(if any) under which that's acceptable.
All this kind of presumes that SRFI-18 is something that the Guile
maintainers care about supporting. Is it? I'm afraid I don't know
the Guile project's attitude towards implementing SRFIs.
Regards,
Julian
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next reply other threads:[~2007-10-11 1:54 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-11 1:54 Julian Graham [this message]
2007-10-12 8:42 ` srfi-18 requirements Ludovic Courtès
2007-10-12 15:31 ` Julian Graham
2007-10-15 22:26 ` Julian Graham
2007-10-15 22:35 ` Stephen Compall
2007-10-15 22:47 ` Julian Graham
2007-10-29 14:37 ` Julian Graham
2007-11-26 18:11 ` Julian Graham
2007-11-27 9:14 ` Ludovic Courtès
2007-11-28 18:23 ` Ludovic Courtès
2007-11-28 18:55 ` Julian Graham
2007-12-01 5:08 ` Julian Graham
2007-12-01 10:21 ` Ludovic Courtès
2007-12-02 3:59 ` Julian Graham
2007-12-04 22:20 ` Neil Jerram
2007-12-04 22:29 ` Neil Jerram
2007-12-11 4:20 ` Julian Graham
2007-12-18 4:30 ` Julian Graham
2007-12-28 18:46 ` Ludovic Courtès
2007-12-28 19:08 ` Julian Graham
2007-12-28 22:35 ` Neil Jerram
2007-12-30 11:04 ` Neil Jerram
2007-12-30 20:38 ` Julian Graham
2008-01-01 19:09 ` Neil Jerram
2008-01-04 5:01 ` Julian Graham
2008-01-05 0:30 ` Neil Jerram
2008-01-06 21:41 ` Julian Graham
2008-01-08 23:11 ` Neil Jerram
2008-01-11 2:39 ` Julian Graham
2008-01-17 1:48 ` Neil Jerram
2008-01-19 20:10 ` Julian Graham
2008-01-23 22:46 ` Neil Jerram
2008-01-23 23:23 ` Julian Graham
2008-01-25 1:07 ` Neil Jerram
2008-01-25 1:38 ` Julian Graham
2008-01-28 2:06 ` Julian Graham
2008-02-03 0:30 ` Neil Jerram
2008-02-05 6:27 ` Julian Graham
2008-02-07 1:23 ` Neil Jerram
2008-02-07 3:06 ` Julian Graham
2008-02-07 23:26 ` Neil Jerram
2008-02-07 23:33 ` Julian Graham
2008-02-07 23:38 ` Neil Jerram
2008-02-08 0:04 ` Julian Graham
2008-02-11 5:14 ` Julian Graham
2008-02-19 22:48 ` Neil Jerram
2008-02-20 2:10 ` Julian Graham
2008-02-22 0:33 ` Neil Jerram
2008-02-22 4:14 ` Julian Graham
2008-02-24 9:41 ` Neil Jerram
2008-02-24 18:17 ` Julian Graham
2008-02-24 23:29 ` Neil Jerram
2008-03-01 19:56 ` Julian Graham
2008-03-08 16:34 ` Neil Jerram
2008-03-11 4:02 ` Julian Graham
2008-03-22 18:55 ` Julian Graham
2008-03-23 23:57 ` Neil Jerram
2008-03-24 22:03 ` Neil Jerram
2008-03-26 15:55 ` Julian Graham
2008-04-03 0:18 ` Neil Jerram
2008-04-03 19:07 ` Julian Graham
2008-04-09 21:29 ` Neil Jerram
2008-04-14 0:43 ` Julian Graham
2008-05-14 1:23 ` Julian Graham
2008-05-14 21:13 ` Neil Jerram
2008-05-14 23:11 ` Neil Jerram
2008-05-15 5:05 ` Julian Graham
2008-05-24 11:42 ` Neil Jerram
2008-05-24 13:55 ` Neil Jerram
2008-05-25 2:07 ` Julian Graham
2008-05-31 21:41 ` Ludovic Courtès
2008-06-02 4:48 ` Julian Graham
2008-06-21 5:03 ` Julian Graham
2008-06-30 17:51 ` Ludovic Courtès
2008-01-08 23:41 ` Neil Jerram
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