make-time-segment time-segment?
time-segment-time time-segment-queue
- time-< time-= time-<=
+ time-< time-= time-<= time-+
+
+ <time-delta>
+ make-time-delta time-delta?
+ time-delta-sec time-delta-usec
<schedule>
make-schedule schedule?
;;; and with reasonable separation from functional components?
(define-immutable-record-type <agenda>
- (make-agenda-intern queue prompt-tag port-mapping schedule)
+ (make-agenda-intern queue prompt-tag port-mapping schedule time)
agenda?
(queue agenda-queue)
(prompt-tag agenda-prompt-tag)
(port-mapping agenda-port-mapping)
- (schedule agenda-schedule))
+ (schedule agenda-schedule)
+ (time agenda-time))
(define (make-async-prompt-tag)
(make-prompt-tag "prompt"))
(queue (make-q))
(prompt (make-prompt-tag))
(port-mapping (make-port-mapping))
- (schedule (make-schedule)))
- (make-agenda-intern queue prompt port-mapping schedule))
+ (schedule (make-schedule))
+ (time (gettimeofday)))
+ (make-agenda-intern queue prompt port-mapping schedule time))
\f
(or (time-< time1 time2)
(time-= time1 time2)))
+
+(define-record-type <time-delta>
+ (make-time-delta-intern sec usec)
+ time-delta?
+ (sec time-delta-sec)
+ (usec time-delta-usec))
+
+(define* (make-time-delta sec #:optional usec)
+ (make-time-delta-intern sec (or usec 0)))
+
+(define (time-+ time time-delta)
+ (cons (+ (car time) (time-delta-sec time-delta))
+ (+ (cdr time) (time-delta-usec time-delta))))
+
+
(define-record-type <schedule>
(make-schedule-intern segments)
schedule?
(agenda-run-once agenda))))
(if (and stop-condition (stop-condition agenda))
'done
- (loop new-agenda)))))
+ (let ((updated-agenda
+ ;; Adjust the agenda's time just in time
+ ;; We do this here rather than in agenda-run-once to make
+ ;; agenda-run-once's behavior fairly predictable
+ (set-field new-agenda (agenda-time) (gettimeofday))))
+ (loop updated-agenda))))))
(define (agenda-run-once agenda)
"Run once through the agenda, and produce a new agenda