Hi!
Does anyone know if Guile plans to have better support for atomic
operations? For example `atomic-box-fetch-and-add!`.
I know that in theory, one can do the following:
------------------------------------------------------------------------------
(define (atomic-box-fetch-and-apply! box op value)
(let ([old (atomic-box-ref box)])
(if (eq? old
(atomic-box-compare-and-swap! box old (op old value)))
old
(atomic-box-fetch-and-apply! box op value))))
(define (atomic-box-fetch-and-add! box value)
(atomic-box-fetch-and-apply! box + value))
(define (atomic-box-fetch-and-sub! box value)
(atomic-box-fetch-and-apply! box - value))
(define (atomic-box-fetch-and-xor! box value)
(atomic-box-fetch-and-apply! box logxor value))
...
------------------------------------------------------------------------------
and it works.
But I think such operations would be faster if available as primitives in
the VM, if that's possible?
--
Olivier Dion
Polymtl
