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Re: srfi-18 requirements

From: Neil Jerram
Subject: Re: srfi-18 requirements
Date: Thu, 07 Feb 2008 23:26:36 +0000
User-agent: Gnus/5.110006 (No Gnus v0.6) Emacs/21.4 (gnu/linux)

"Julian Graham" <address@hidden> writes:

>> How about if the core join-thread takes an optional timeout-val
>> parameter, like SRFI-18 thread-join! ?  If no timeout-val was
>> supplied, and the join timed out, the core join-thread would return
>> #f.
> For join-thread, sure.  What about scm_join_thread?  Sorry if I'm
> being obtuse, but my understanding was that you didn't want anything
> like scm_join_thread_timed and that changing the signature of
> scm_join_thread was out of the question.  (Or should this enhancement
> only be exposed in Scheme?)

Write scm_join_thread_timed(), which implements all the new behaviour.
Map that to join-thread in Scheme - then that's still back compatible,
because the added args are optional.  Then rewrite scm_join_thread()
as a trivial function that just calls scm_join_thread_timed().

See scm_catch_with_pre_unwind_handler() and scm_catch() in throw.c for
a similar example.

Does that sound OK to you?


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