schedule-segments-split schedule-extract-until!
add-segments-contents-to-queue!
- %8sync
-
<run-request>
make-run-request run-request?
run-request-proc run-request-when
run-it wrap wrap-apply run run-at run-delay
- %run %run-at %run-delay %port-request
- %8sync-run %8sync-run-at %8sync-run-delay %8sync-port
+ 8sync 8sync-delay
+ 8sync-run 8sync-run-at 8sync-run-delay
+ 8sync-port 8sync-port-remove
+ 8sync-nowait
- catch-8sync catch-%8sync
+ catch-8sync
;; used for introspecting the error, but a method for making
;; is not exposed
(schedule (make-schedule))
(time (gettimeofday))
(catch-handler #f)
- (pre-unwind-handler #f))
+ (pre-unwind-handler print-error-and-continue))
;; TODO: document arguments
"Make a fresh agenda."
(make-agenda-intern queue prompt
;;; Asynchronous escape to run things
;;; =================================
-(define-syntax-rule (%8sync async-request)
- "Run BODY asynchronously at a prompt, passing args to make-future.
-
-Runs things asynchronously (8synchronously?)"
- (propagate-%async-exceptions
- (abort-to-prompt (current-agenda-prompt)
- async-request)))
+(define-syntax-rule (8sync-abort-to-prompt async-request)
+ (abort-to-prompt (current-agenda-prompt)
+ async-request))
;; Async port request and run-request meta-requests
(define (make-async-request proc)
"Wrap PROC in an async-request
The purpose of this is to make sure that users don't accidentally
-return the wrong thing via (%8sync) and trip themselves up."
+return the wrong thing via (8sync) and trip themselves up."
(cons '*async-request* proc))
(define (setup-async-request resume-kont async-request)
;; TODO: deliver more helpful errors depending on what the user
;; returned
(_ (throw 'invalid-async-request
- "Invalid request passed back via an (%8sync) procedure."
+ "Invalid request passed back via an (8sync) procedure."
async-request))))
(define-record-type <wrapped-exception>
(wrapped-exception-stacks body-result))
body-result)))
-(define-syntax-rule (%run body ...)
- (%run-at body ... #f))
-
-(define-syntax-rule (%run-at body ... when)
- ;; Send an asynchronous request to apply a continuation to the
- ;; following function, then handle that as a request to the agenda
- (make-async-request
- (lambda (kont)
- ;; We're making a run request
- (make-run-request
- ;; Wrapping the following execution to run...
- (wrap
- ;; Once we get the result from the inner part, we'll resume
- ;; this continuation, but first
- ;; @@: Is this running immediately, or queueing the result
- ;; after evaluation for the next agenda tick? It looks
- ;; like evaluating immediately. Is that what we want?
- (kont
- ;; Any unhandled errors are caught
- (let ((exception-stack #f))
- (catch #t
- ;; Run the actual code the user requested
- (lambda ()
- body ...)
- ;; If something bad happened and we didn't catch it,
- ;; we'll wrap it up in such a way that the continuation
- ;; can address it
- (lambda (key . args)
- (cond
- ((eq? key '8sync-caught-error)
- (match args
- ((orig-key orig-args orig-stacks)
- (make-wrapped-exception
- orig-key orig-args
- (cons exception-stack orig-stacks)))))
- (else
- (make-wrapped-exception key args
- (list exception-stack)))))
- (lambda _
- (set! exception-stack (make-stack #t 1 0)))))))
- when))))
-
-(define-syntax-rule (%run-delay body ... delay-time)
- (%run-at body ... (tdelta delay-time)))
-
-(define-syntax-rule (%port-request port port-request-args ...)
- (make-async-request
- (lambda (kont)
- (list (make-port-request port port-request-args ...)
- (make-run-request kont)))))
-
-(define-syntax-rule (%port-remove-request port)
- (make-async-request
- (lambda (kont)
- (list (make-port-remove-request port)
- (make-run-request kont)))))
-
-
-;; Sugar
-(define-syntax-rule (%8sync-run rest ...)
- "Sugar for (%8sync (%run ...))"
- (%8sync (%run rest ...)))
-
-(define-syntax-rule (%8sync-run-at rest ...)
- "Sugar for (%8sync (%run-at ...))"
- (%8sync (%run-at rest ...)))
-
-(define-syntax-rule (%8sync-run-delay rest ...)
- "Sugar for (%8sync (%run-delay ...))"
- (%8sync (%run-delay rest ...)))
-
-(define-syntax-rule (%8sync-port rest ...)
- "Sugar for (%8sync (%port-request ...))"
- (%8sync (%port-request rest ...)))
+(define-syntax 8sync
+ (syntax-rules ()
+ "Run BODY asynchronously (8synchronously?) at a prompt, then return.
+
+Possibly specify WHEN as the second argument."
+ ((8sync body)
+ (8sync-run body))
+ ((8sync body when)
+ (8sync-run-at body when))))
+
+(define-syntax-rule (8sync-run body ...)
+ (8sync-run-at body ... #f))
+
+(define-syntax-rule (8sync-run-at body ... when)
+ (propagate-%async-exceptions
+ (8sync-abort-to-prompt
+ ;; Send an asynchronous request to apply a continuation to the
+ ;; following function, then handle that as a request to the agenda
+ (make-async-request
+ (lambda (kont)
+ ;; We're making a run request
+ (make-run-request
+ ;; Wrapping the following execution to run...
+ (wrap
+ ;; Once we get the result from the inner part, we'll resume
+ ;; this continuation, but first
+ ;; @@: Is this running immediately, or queueing the result
+ ;; after evaluation for the next agenda tick? It looks
+ ;; like evaluating immediately. Is that what we want?
+ (kont
+ ;; Any unhandled errors are caught
+ (let ((exception-stack #f))
+ (catch #t
+ ;; Run the actual code the user requested
+ (lambda ()
+ body ...)
+ ;; If something bad happened and we didn't catch it,
+ ;; we'll wrap it up in such a way that the continuation
+ ;; can address it
+ (lambda (key . args)
+ (cond
+ ((eq? key '8sync-caught-error)
+ (match args
+ ((orig-key orig-args orig-stacks)
+ (make-wrapped-exception
+ orig-key orig-args
+ (cons exception-stack orig-stacks)))))
+ (else
+ (make-wrapped-exception key args
+ (list exception-stack)))))
+ (lambda _
+ (set! exception-stack (make-stack #t 1 0)))))))
+ when))))))
+
+(define-syntax-rule (8sync-run-delay body ... delay-time)
+ (8sync-run-at body ... (tdelta delay-time)))
+
+(define-syntax-rule (8sync-delay args ...)
+ (8sync-run-delay args ...))
+
+(define-syntax-rule (8sync-port port port-request-args ...)
+ (8sync-abort-to-prompt
+ (make-async-request
+ (lambda (kont)
+ (list (make-port-request port port-request-args ...)
+ (make-run-request
+ ;; What's with returning #f to kont?
+ ;; Otherwise we sometimes get errors like
+ ;; "Zero values returned to single-valued continuation""
+ (wrap (kont #f)) #f))))))
+
+(define-syntax-rule (8sync-port-remove port)
+ (8sync-abort-to-prompt
+ (make-async-request
+ (lambda (kont)
+ (list (make-port-remove-request port)
+ (make-run-request
+ ;; See comment in 8sync-port
+ (wrap (kont #f)) #f))))))
;; TODO: Write (%run-immediately)
-;; TODO
-(define-syntax-rule (%run-with-return return body ...)
- (make-async-request
- (lambda (kont)
- (let ((return kont))
- (lambda ()
- body ...)))))
+(define-syntax-rule (8sync-nowait body)
+ "Run body asynchronously but ignore its result...
+forge ahead in our current function!"
+ (8sync-abort-to-prompt
+ (make-async-request
+ (lambda (kont)
+ (list (make-run-request
+ ;; See comment in 8sync-port
+ (wrap (kont #f)) #f)
+ (make-run-request (lambda () body) #f))))))
(define-syntax-rule (catch-8sync exp (handler-key handler) ...)
(catch '8sync-caught-error
(else (raise '8sync-caught-error
orig-key orig-args orig-stacks))))))
-;; Alias...?
-(define-syntax-rule (catch-%8sync rest ...)
- (catch-8sync rest ...))
-
\f
;;; Execution of agenda, and current agenda
#:key
;; @@: Should we make stop-on-nothing-to-do
;; the default stop-condition?
- stop-condition
+ (stop-condition stop-on-nothing-to-do)
(get-time gettimeofday)
(handle-ports update-agenda-from-select!))
;; TODO: Document fields
projects / 8sync.git / blobdiff