(queue time-segment-queue))
(define (time-segment-right-format time)
+ "Ensure TIME is in the right format.
+
+The right format means (second . microsecond).
+If an integer, will convert appropriately."
+ ;; TODO: add floating point / rational number support.
(match time
;; time is already a cons of second and microsecnd
(((? integer? s) . (? integer? u)) time)
(_ (throw 'invalid-time "Invalid time" time))))
(define* (make-time-segment time #:optional (queue (make-q)))
+ "Make a time segment of TIME and QUEUE
+
+No automatic conversion is done, so you might have to
+run (time-segment-right-format) first."
(make-time-segment-intern time queue))
(define (time< time1 time2)
+ "Check if TIME1 is less than TIME2"
(cond ((< (car time1)
(car time2))
#t)
(else #f)))
(define (time= time1 time2)
+ "Check whether TIME1 and TIME2 are equivalent"
(and (= (car time1) (car time2))
(= (cdr time1) (cdr time2))))
(define (time<= time1 time2)
+ "Check if TIME1 is less than or equal to TIME2"
(or (time< time1 time2)
(time= time1 time2)))
(sec time-delta-sec)
(usec time-delta-usec))
-(define* (make-time-delta sec #:optional usec)
- (make-time-delta-intern sec (or usec 0)))
+(define* (make-time-delta sec #:optional (usec 0))
+ "Make a <time-delta> of SEC seconds and USEC microseconds.
+
+This is used primarily so the agenda can recognize RUN-REQUEST objects
+which are meant "
+ (make-time-delta-intern sec usec))
(define tdelta make-time-delta)
(else time)))
(define (time-delta+ time time-delta)
+ "Increment a TIME by the value of TIME-DELTA"
(time-carry-correct
(cons (+ (car time) (time-delta-sec time-delta))
(+ (cdr time) (time-delta-usec time-delta)))))
(define (time-minus time1 time2)
+ "Subtract TIME2 from TIME1"
(time-carry-correct
(cons (- (car time1) (car time2))
(- (cdr time2) (cdr time2)))))
(define (time-plus time1 time2)
+ "Add TIME1 and TIME2"
(time-carry-correct
(cons (+ (car time1) (car time2))
(+ (cdr time2) (cdr time2)))))
(segments schedule-segments set-schedule-segments!))
(define* (make-schedule #:optional segments)
+ "Make a schedule, optionally pre-composed of SEGMENTS"
(make-schedule-intern (or segments '())))
(define (schedule-soonest-time schedule)
;; but at least it'll be reasonably easy to refactor to
;; a more functional setup?
(define (schedule-add! schedule time proc)
+ "Mutate SCHEDULE, adding PROC at an appropriate time segment for TIME"
(let ((time (time-segment-right-format time)))
(define (new-time-segment)
(let ((new-segment
(loop (schedule-segments schedule)))))
(define (schedule-empty? schedule)
+ "Check if the SCHEDULE is currently empty"
(eq? (schedule-segments schedule) '()))
(define (schedule-segments-split schedule time)
segments))
-\f
-;;; Port handling
-;;; =============
-
-(define (make-port-mapping)
- (make-hash-table))
-
-(define* (port-mapping-set! port-mapping port #:optional read write except)
- "Sets port-mapping for reader / writer / exception handlers"
- (if (not (or read write except))
- (throw 'no-handlers-given "No handlers given for port" port))
- (hashq-set! port-mapping port
- `#(,read ,write ,except)))
-
-(define (port-mapping-remove! port-mapping port)
- (hashq-remove! port-mapping port))
-
-;; TODO: This is O(n), I'm pretty sure :\
-;; ... it might be worthwhile for us to have a
-;; port-mapping record that keeps a count of how many
-;; handlers (maybe via a promise?)
-(define (port-mapping-empty? port-mapping)
- "Is this port mapping empty?"
- (eq? (hash-count (const #t) port-mapping) 0))
-
-(define (port-mapping-non-empty? port-mapping)
- "Whether this port-mapping contains any elements"
- (not (port-mapping-empty? port-mapping)))
-
-
\f
;;; Request to run stuff
;;; ====================
(make-run-request (wrap body ...) when))
(define-syntax-rule (run-delay body ... delay-time)
+ "Run BODY at DELAY-TIME time from now"
(make-run-request (wrap body ...) (tdelta delay-time)))
(define (delay run-request delay-time)