-(define-module (loopy agenda)
+(define-module (eightsync agenda)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9)
#:use-module (srfi srfi-9 gnu)
schedule-segments-split schedule-extract-until!
add-segments-contents-to-queue!
+ %sync 8sync %sync-at 8sync-at %sync-delay 8sync-delay
+
<run-request>
make-run-request run-request?
run-request-proc run-request-when
+ <port-request>
+ make-port-request port-request?
+ port-request-port
+ port-request-read port-request-write port-request-except
+
run-it wrap run run-at run-delay
%current-agenda
;;; Request to run stuff
;;; ====================
-(define-immutable-record-type <run-request>
+(define-record-type <run-request>
(make-run-request proc when)
run-request?
(proc run-request-proc)
(make-run-request (wrap body ...) (tdelta delay-time)))
+;; A request to set up a port with at least one of read, write, except
+;; handling processes
+
+(define-record-type <port-request>
+ (make-port-request-intern port read write except)
+ port-request?
+ (port port-request-port)
+ (read port-request-read)
+ (write port-request-write)
+ (except port-request-except))
+
+(define* (make-port-request port #:key read write except)
+ (if (not (or read write except))
+ (throw 'no-port-handler-given "No port handler given.\n"))
+ (make-port-request-intern port read write except))
+
+
\f
;;; Asynchronous escape to run things
;;; =================================
(make-future call-first on-success on-fail on-error)
when))
-(define-syntax-rule (async body args ...)
+(define-syntax-rule (%sync body args ...)
+ "Run BODY asynchronously at a prompt, passing args to make-future.
+
+Pronounced `async' despite the spelling.
+
+%sync was chosen because (async) was already taken and could lead to
+errors, and this version of asynchronous code uses a prompt, so the `a'
+character becomes a `%' prompt! :)
+
+The % and 8 characters kind of look similar... hence this library's
+name! (There are 8sync aliases if you prefer that name.)"
(abort-to-prompt (current-agenda-prompt)
(wrap body)
args ...))
-(define-syntax-rule (async-at body when args ...)
+(define-syntax-rule (%sync-at body when args ...)
(abort-to-prompt (current-agenda-prompt)
(wrap body)
- (append (list #:when when)
- args ...)))
+ #:when when
+ args ...))
-(define-syntax-rule (async-delay body delay-time args ...)
+(define-syntax-rule (%sync-delay body delay-time args ...)
(abort-to-prompt (current-agenda-prompt)
(wrap body)
- (append (list #:when (tdelta delay-time))
- args ...)))
+ #:when (tdelta delay-time)
+ args ...))
+
+(define-syntax-rule (8sync args ...)
+ "Alias for %sync"
+ (%sync args ...))
+
+(define-syntax-rule (8sync-at args ...)
+ "Alias for %sync-at"
+ (%sync-at args ...))
+
+(define-syntax-rule (8sync-delay args ...)
+ "Alias for %sync-delay"
+ (8sync-delay args ...))
+
\f
;;; Execution of agenda, and current agenda
(update-agenda)
agenda))
+(define (agenda-handle-port-request! agenda port-request)
+ "Update an agenda for a port-request"
+ (define (handle-selector request-selector port-map-selector)
+ (if (request-selector port-request)
+ (hash-set! (port-map-selector agenda)
+ (port-request-port port-request)
+ (request-selector port-request))))
+ (handle-selector port-request-read agenda-read-port-map)
+ (handle-selector port-request-write agenda-write-port-map)
+ (handle-selector port-request-except agenda-except-port-map))
+
(define* (start-agenda agenda
#:key stop-condition
(schedule-at! request-time (run-request-proc run-request)))
(#f
(enq! next-queue (run-request-proc run-request))))))))
+ (define (handle-individual result)
+ (match result
+ ((? run-request? new-proc)
+ (enqueue new-proc))
+ ((? port-request? port-request)
+ (agenda-handle-port-request! agenda port-request))
+ ;; do nothing
+ (_ #f)))
;; @@: We might support delay-wrapped procedures here
(match proc-result
;; TODO: replace procedure with something that indicates
;; intent to run. Use a (run foo) procedure
- ((? run-request? new-proc)
- (enqueue new-proc))
- (((? run-request? new-procs) ...)
- (for-each
- (lambda (new-proc)
- (enqueue new-proc))
- new-procs))
- ;; do nothing
- (_ #f))))
+ ((results ...)
+ (for-each handle-individual results))
+ (one-result (handle-individual one-result)))))
;; TODO: Alternately, we could return the next-queue
;; along with changes to be added to the schedule here?
;; Return new agenda, with next queue set