On Aug 5, 2009, at 10:06, Ken Raeburn wrote:
(1) In scm_pthread_mutex_lock, we leave and re-enter guile mode so
that we don't block the thread while in guile mode. But we could
use pthread_mutex_trylock first, and avoid the costs scm_leave_guile
seems to incur on the Mac. If we can't acqui
Hi,
On Wed 05 Aug 2009 12:42, Andy Wingo writes:
> The simple stack formulation of Ackermann's function is faster of
> course:
>
> (define (A m n)
> (if (= m 0)
> (+ n 1)
> (if (= n 0)
> (A (- m 1) 1)
> (A (- m 1) (A m (- n 1))
>
> (A
On Aug 5, 2009, at 10:06, I wrote:
(3) My four-year-old comments on scm_enter/leave_guile, recorded in
threads.c around line 300, still stand Those functions really
ought to go away. At least they're confined to one file, now. Some
of it looks a little messy, but I can probably get ri
