[slime-devel] Re: Slime and :sb-futex on recent CVS SBCLs

[Christophe Rhodes]

Luke Gorrie <luke at synap.se> writes:

> Christophe Rhodes <csr21 at cam.ac.uk> writes:
>
>> If it's possible given the time constraints and cvs tagging activity,
>> I'd be happy if the preferred-communication-style checked only
>> :sb-thread, and if the slime release notes for 1.2 required an sbcl of
>> 0.8.21 or later.
>
> Does :sb-thread reasonably imply a working threads implementation? My
> only concern is that if SBCL on some platforms would have :sb-thread
> by default but not a reliable implementation, i.e. if SLIME suddenly
> starts using threads by default on platforms where it shouldn't.

I think (Dan reads this list, so he'll correct me if I'm wrong) that
from 0.8.21 :sb-thread implies the previous combination of :sb-thread
and :sb-futex before.  That said, there is a possible snafu where an
sbcl with :sb-thread will nevertheless refuse to start new threads if
the underlying kernel is insufficiently futexed.

Cheers,

Christophe