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Finished implementation for pending interrupts.

This commit is contained in:
mainzelm 2002-08-05 11:30:33 +00:00
parent 66c2ae5d38
commit cad4096910
1 changed files with 15 additions and 10 deletions
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25
scsh/sighandlers.scm
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@ -60,10 +60,10 @@
(interrupt-in-set? int *pending-interrupts*)) (interrupt-in-set? int *pending-interrupts*))
(define (make-interrupt-pending int) (define (make-interrupt-pending int)
(insert-interrupt int *pending-interrupts*)) (set! *pending-interrupts* (insert-interrupt int *pending-interrupts*)))
(define (remove-pending-interrupt int) (define (remove-pending-interrupt int)
(remove-interrupt int *pending-interrupts*)) (set! *pending-interrupts* (remove-interrupt int *pending-interrupts*)))
;;; I'm trying to be consistent about the ! suffix -- I don't use it ;;; I'm trying to be consistent about the ! suffix -- I don't use it
;;; when frobbing process state. This is not a great rule; perhaps I ;;; when frobbing process state. This is not a great rule; perhaps I
@ -71,13 +71,17 @@
;;; ;;;
;;; I think you should... ;;; I think you should...
(define (set-enabled-interrupts new-enabled-interrupts) (define (set-enabled-interrupts new-enabled-interrupts)
(do ((int 0 (+ int 1))) (let ((old-enabled-interrupts *enabled-interrupts*))
((= int number-of-interrupts) new-enabled-interrupts) ;;; set it here so the handlers see the correct value
(let ((old-state (interrupt-enabled? int *enabled-interrupts*)) (set! *enabled-interrupts* new-enabled-interrupts)
(new-state (interrupt-enabled? int new-enabled-interrupts))) (do ((int 0 (+ int 1)))
(if (and (not old-state) new-state (interrupt-pending? int)) ((= int number-of-interrupts) new-enabled-interrupts)
(call-interrupt-handler int)))) (let ((old-state (interrupt-enabled? int old-enabled-interrupts))
(set! *enabled-interrupts* new-enabled-interrupts)) (new-state (interrupt-enabled? int new-enabled-interrupts)))
(if (and (not old-state) new-state (interrupt-pending? int))
(begin
(remove-pending-interrupt int)
(call-interrupt-handler int)))))))
(define-simple-syntax (with-enabled-interrupts interrupt-set body ...) (define-simple-syntax (with-enabled-interrupts interrupt-set body ...)
(begin (begin
@ -200,7 +204,8 @@
last full-interrupt-set)) last full-interrupt-set))
(interrupt ((structure-ref sigevents sigevent-type) event))) (interrupt ((structure-ref sigevents sigevent-type) event)))
(if (interrupt-enabled? interrupt (enabled-interrupts)) (if (interrupt-enabled? interrupt (enabled-interrupts))
(call-interrupt-handler interrupt)) (call-interrupt-handler interrupt)
(make-interrupt-pending interrupt))
(lp event)))) (lp event))))
;;; I am ashamed to say the 33 below is completely bogus. ;;; I am ashamed to say the 33 below is completely bogus.