--- /dev/null
+;;; 8sync --- Asynchronous programming for Guile
+;;; Copyright (C) 2015 Christopher Allan Webber <cwebber@dustycloud.org>
+;;;
+;;; This file is part of 8sync.
+;;;
+;;; 8sync is free software: you can redistribute it and/or modify it
+;;; under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation, either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; 8sync is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU Lesser General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with 8sync. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (8sync agenda)
+ #:use-module (srfi srfi-1)
+ #:use-module (srfi srfi-9)
+ #:use-module (srfi srfi-9 gnu)
+ #:use-module (ice-9 q)
+ #:use-module (ice-9 match)
+ #:use-module (ice-9 receive)
+ #:export (<agenda>
+ make-agenda agenda?
+ agenda-queue agenda-prompt-tag
+ agenda-read-port-map agenda-write-port-map agenda-except-port-map
+ agenda-schedule
+
+ make-async-prompt-tag
+
+ list->q make-q*
+
+ <time-segment>
+ make-time-segment time-segment?
+ time-segment-time time-segment-queue
+
+ time< time= time<= time-delta+
+ time-minus time-plus
+
+ <time-delta>
+ make-time-delta tdelta time-delta?
+ time-delta-sec time-delta-usec
+
+ <schedule>
+ make-schedule schedule?
+ schedule-add! schedule-empty?
+ schedule-segments
+ schedule-soonest-time
+
+ 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
+
+ <port-request>
+ make-port-request port-request port-request?
+ port-request-port
+ port-request-read port-request-write port-request-except
+
+ run-it wrap wrap-apply run run-at run-delay
+
+ %port-request %run %run-at %run-delay
+
+ catch-8sync catch-%8sync
+
+ ;; used for introspecting the error, but a method for making
+ ;; is not exposed
+ wrapped-exception?
+ wrapped-exception-key wrapped-exception-args
+ wrapped-exception-stacks
+
+ print-error-and-continue
+
+ %current-agenda
+ start-agenda agenda-run-once))
+
+;; @@: Using immutable agendas here, so wouldn't it make sense to
+;; replace this queue stuff with using pfds based immutable queues?
+
+\f
+;;; Agenda definition
+;;; =================
+
+;;; The agenda consists of:
+;;; - a queue of immediate items to handle
+;;; - sheduled future events to be added to a future queue
+;;; - a tag by which running processes can escape for some asynchronous
+;;; operation (from which they can be returned later)
+;;; - a mapping of ports to various handler procedures
+;;;
+;;; The goal, eventually, is for this all to be immutable and functional.
+;;; However, we aren't there yet. Some tricky things:
+;;; - The schedule needs to be immutable, yet reasonably efficient.
+;;; - Need to use immutable queues (ijp's pfds library?)
+;;; - Modeling reading from ports as something repeatable,
+;;; and with reasonable separation from functional components?
+
+(define-immutable-record-type <agenda>
+ (make-agenda-intern queue prompt-tag
+ read-port-map write-port-map except-port-map
+ schedule time catch-handler pre-unwind-handler)
+ agenda?
+ (queue agenda-queue)
+ (prompt-tag agenda-prompt-tag)
+ (read-port-map agenda-read-port-map)
+ (write-port-map agenda-write-port-map)
+ (except-port-map agenda-except-port-map)
+ (schedule agenda-schedule)
+ (time agenda-time)
+ (catch-handler agenda-catch-handler)
+ (pre-unwind-handler agenda-pre-unwind-handler))
+
+(define (make-async-prompt-tag)
+ "Make an async prompt tag for an agenda.
+
+Generally done automatically for the user through (make-agenda)."
+ (make-prompt-tag "prompt"))
+
+(define* (make-agenda #:key
+ (queue (make-q))
+ (prompt (make-prompt-tag))
+ (read-port-map (make-hash-table))
+ (write-port-map (make-hash-table))
+ (except-port-map (make-hash-table))
+ (schedule (make-schedule))
+ (time (gettimeofday))
+ (catch-handler #f)
+ (pre-unwind-handler #f))
+ ;; TODO: document arguments
+ "Make a fresh agenda."
+ (make-agenda-intern queue prompt
+ read-port-map write-port-map except-port-map
+ schedule time
+ catch-handler pre-unwind-handler))
+
+(define (current-agenda-prompt)
+ "Get the prompt for the current agenda; signal an error if there isn't one."
+ (let ((current-agenda (%current-agenda)))
+ (if (not current-agenda)
+ (throw
+ 'no-current-agenda
+ "Can't get current agenda prompt if there's no current agenda!")
+ (agenda-prompt-tag current-agenda))))
+
+;; helper for making queues for an agenda
+(define (list->q lst)
+ "Makes a queue composed of LST items"
+ (let ((q (make-q)))
+ (for-each
+ (lambda (x)
+ (enq! q x))
+ lst)
+ q))
+
+(define (make-q* . args)
+ "Makes a queue and populates it with this invocation's ARGS"
+ (list->q args))
+
+\f
+;;; Schedule
+;;; ========
+
+;;; This is where we handle timed events for the future
+
+;; This section totally borrows from the ideas in SICP
+;; <3 <3 <3
+
+;; NOTE: time is a cons of (seconds . microseconds)
+
+(define-record-type <time-segment>
+ (make-time-segment-intern time queue)
+ time-segment?
+ (time time-segment-time)
+ (queue time-segment-queue))
+
+;; @@: This seems to be the same as srfi-18's seconds->time procedure?
+;; Maybe double check and switch to that? (Thanks amz3!)
+
+(define (time-from-float-or-fraction time)
+ "Produce a (sec . usec) pair from TIME, a float or fraction"
+ (let* ((mixed-whole (floor time))
+ (mixed-rest (- time mixed-whole)) ; float or fraction component
+ (sec mixed-whole)
+ (usec (floor (* 1000000 mixed-rest))))
+ (cons (inexact->exact sec) (inexact->exact usec))))
+
+(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)
+ ;; time was just an integer (just the second)
+ ((? integer? _) (cons time 0))
+ ((or (? rational? _) (? inexact? _))
+ (time-from-float-or-fraction 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)
+ ((and (= (car time1)
+ (car time2))
+ (< (cdr time1)
+ (cdr 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)))
+
+
+(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 time)
+ "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 to delay computation"
+ (match (time-segment-right-format time)
+ ((sec . usec)
+ (make-time-delta-intern sec usec))))
+
+(define tdelta make-time-delta)
+
+(define (time-carry-correct time)
+ "Corrects/handles time microsecond carry.
+Will produce (0 . 0) instead of a negative number, if needed."
+ (cond ((>= (cdr time) 1000000)
+ (cons
+ (+ (car time) 1)
+ (- (cdr time) 1000000)))
+ ((< (cdr time) 0)
+ (if (= (car time) 0)
+ '(0 0)
+ (cons
+ (- (car time) 1)
+ (+ (cdr time) 1000000))))
+ (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 time1) (cdr time2)))))
+
+(define (time-plus time1 time2)
+ "Add TIME1 and TIME2"
+ (time-carry-correct
+ (cons (+ (car time1) (car time2))
+ (+ (cdr time1) (cdr time2)))))
+
+
+(define-record-type <schedule>
+ (make-schedule-intern segments)
+ schedule?
+ (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)
+ "Return a cons of (sec . usec) for next time segement, or #f if none"
+ (let ((segments (schedule-segments schedule)))
+ (if (eq? segments '())
+ #f
+ (time-segment-time (car segments)))))
+
+;; TODO: This code is reasonably easy to read but it
+;; mutates AND is worst case of O(n) in both space and time :(
+;; 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
+ (make-time-segment time)))
+ (enq! (time-segment-queue new-segment) proc)
+ new-segment))
+ (define (loop segments)
+ (define (segment-equals-time? segment)
+ (time= time (time-segment-time segment)))
+
+ (define (segment-more-than-time? segment)
+ (time< time (time-segment-time segment)))
+
+ ;; We could switch this out to be more mutate'y
+ ;; and avoid the O(n) of space... is that over-optimizing?
+ (match segments
+ ;; If we're at the end of the list, time to make a new
+ ;; segment...
+ ('() (cons (new-time-segment) '()))
+ ;; If the segment's time is exactly our time, good news
+ ;; everyone! Let's append our stuff to its queue
+ (((? segment-equals-time? first) rest ...)
+ (enq! (time-segment-queue first) proc)
+ segments)
+ ;; If the first segment is more than our time,
+ ;; ours belongs before this one, so add it and
+ ;; start consing our way back
+ (((? segment-more-than-time? first) rest ...)
+ (cons (new-time-segment) segments))
+ ;; Otherwise, build up recursive result
+ ((first rest ... )
+ (cons first (loop rest)))))
+ (set-schedule-segments!
+ schedule
+ (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)
+ "Does a multiple value return of time segments before/at and after TIME"
+ (let ((time (time-segment-right-format time)))
+ (define (segment-is-now? segment)
+ (time= (time-segment-time segment) time))
+ (define (segment-is-before-now? segment)
+ (time< (time-segment-time segment) time))
+
+ (let loop ((segments-before '())
+ (segments-left (schedule-segments schedule)))
+ (match segments-left
+ ;; end of the line, return
+ ('()
+ (values (reverse segments-before) '()))
+
+ ;; It's right now, so time to stop, but include this one in before
+ ;; but otherwise return
+ (((? segment-is-now? first) rest ...)
+ (values (reverse (cons first segments-before)) rest))
+
+ ;; This is prior or at now, so add it and keep going
+ (((? segment-is-before-now? first) rest ...)
+ (loop (cons first segments-before) rest))
+
+ ;; Otherwise it's past now, just return what we have
+ (segments-after
+ (values segments-before segments-after))))))
+
+(define (schedule-extract-until! schedule time)
+ "Extract all segments until TIME from SCHEDULE, and pop old segments off"
+ (receive (segments-before segments-after)
+ (schedule-segments-split schedule time)
+ (set-schedule-segments! schedule segments-after)
+ segments-before))
+
+(define (add-segments-contents-to-queue! segments queue)
+ (for-each
+ (lambda (segment)
+ (let ((seg-queue (time-segment-queue segment)))
+ (while (not (q-empty? seg-queue))
+ (enq! queue (deq! seg-queue)))))
+ segments))
+
+
+\f
+;;; Request to run stuff
+;;; ====================
+
+(define-record-type <run-request>
+ (make-run-request proc when)
+ run-request?
+ (proc run-request-proc)
+ (when run-request-when))
+
+(define* (run-it proc #:optional when)
+ "Make a request to run PROC (possibly at WHEN)"
+ (make-run-request proc when))
+
+(define-syntax-rule (wrap body ...)
+ "Wrap contents in a procedure"
+ (lambda ()
+ body ...))
+
+(define-syntax-rule (wrap-apply body)
+ "Wrap possibly multi-value function in a procedure, applies all arguments"
+ (lambda args
+ (apply body args)))
+
+
+;; @@: Do we really want `body ...' here?
+;; what about just `body'?
+(define-syntax-rule (run body ...)
+ "Run everything in BODY but wrap in a convenient procedure"
+ (make-run-request (wrap body ...) #f))
+
+(define-syntax-rule (run-at body ... when)
+ "Run BODY at WHEN"
+ (make-run-request (wrap body ...) when))
+
+;; @@: Is it okay to overload the term "delay" like this?
+;; Would `run-in' be better?
+(define-syntax-rule (run-delay body ... delay-time)
+ "Run BODY at DELAY-TIME time from now"
+ (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))
+
+(define port-request make-port-request)
+
+
+\f
+;;; 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)))
+
+;; 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."
+ (cons '*async-request* proc))
+
+(define (setup-async-request resume-kont async-request)
+ "Complete an async request for agenda-run-once's continuation handling"
+ (match async-request
+ (('*async-request* . async-setup-proc)
+ (async-setup-proc resume-kont))
+ ;; TODO: deliver more helpful errors depending on what the user
+ ;; returned
+ (_ (throw 'invalid-async-request
+ "Invalid request passed back via an (%8sync) procedure."
+ async-request))))
+
+(define-record-type <wrapped-exception>
+ (make-wrapped-exception key args stacks)
+ wrapped-exception?
+ (key wrapped-exception-key)
+ (args wrapped-exception-args)
+ (stacks wrapped-exception-stacks))
+
+(define-syntax-rule (propagate-%async-exceptions body)
+ (let ((body-result body))
+ (if (wrapped-exception? body-result)
+ (throw '8sync-caught-error
+ (wrapped-exception-key body-result)
+ (wrapped-exception-args body-result)
+ (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 add-this-port port-request-args ...)
+ (make-async-request
+ (lambda (kont)
+ (list (make-port-request port-request-args ...)
+ (make-run-request kont)))))
+
+;; TODO
+(define-syntax-rule (%run-with-return return body ...)
+ (make-async-request
+ (lambda (kont)
+ (let ((return kont))
+ (lambda ()
+ body ...)))))
+
+(define-syntax-rule (catch-8sync exp (handler-key handler) ...)
+ (catch '8sync-caught-error
+ (lambda ()
+ exp)
+ (lambda (_ orig-key orig-args orig-stacks)
+ (cond
+ ((or (eq? handler-key #t)
+ (eq? orig-key handler-key))
+ (apply handler orig-stacks orig-args)) ...
+ (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
+;;; =======================================
+
+(define %current-agenda (make-parameter #f))
+
+(define (update-agenda-from-select! agenda)
+ "Potentially (select) on ports specified in agenda, adding items to queue"
+ (define (hash-keys hash)
+ (hash-map->list (lambda (k v) k) hash))
+ (define (get-wait-time)
+ ;; TODO: we need to figure this out based on whether there's anything
+ ;; in the queue, and if not, how long till the next scheduled item
+ (let ((soonest-time (schedule-soonest-time (agenda-schedule agenda))))
+ (cond
+ ((not (q-empty? (agenda-queue agenda)))
+ (cons 0 0))
+ (soonest-time ; ie, the agenda is non-empty
+ (let* ((current-time (agenda-time agenda)))
+ (if (time<= soonest-time current-time)
+ ;; Well there's something due so let's select
+ ;; (this avoids a (possible?) race condition chance)
+ (cons 0 0)
+ (time-minus soonest-time current-time))))
+ (else
+ (cons #f #f)))))
+ (define (do-select)
+ ;; TODO: support usecond wait time too
+ (match (get-wait-time)
+ ((sec . usec)
+ (catch 'system-error
+ (lambda ()
+ (select (hash-keys (agenda-read-port-map agenda))
+ (hash-keys (agenda-write-port-map agenda))
+ (hash-keys (agenda-except-port-map agenda))
+ sec usec))
+ (lambda (key . rest-args)
+ (match rest-args
+ ((_ _ _ (EINTR))
+ '(() () ()))
+ (_ (error "Unhandled error in select!" key rest-args))))))))
+ (define (get-procs-to-run)
+ (define (ports->procs ports port-map)
+ (lambda (initial-procs)
+ (fold
+ (lambda (port prev)
+ (cons (lambda ()
+ ((hash-ref port-map port) port))
+ prev))
+ initial-procs
+ ports)))
+ (match (do-select)
+ ((read-ports write-ports except-ports)
+ ;; @@: Come on, we can do better than append ;P
+ ((compose (ports->procs
+ read-ports
+ (agenda-read-port-map agenda))
+ (ports->procs
+ write-ports
+ (agenda-write-port-map agenda))
+ (ports->procs
+ except-ports
+ (agenda-except-port-map agenda)))
+ '()))))
+ (define (update-agenda)
+ (let ((procs-to-run (get-procs-to-run))
+ (q (agenda-queue agenda)))
+ (for-each
+ (lambda (proc)
+ (enq! q proc))
+ procs-to-run))
+ agenda)
+ (define (ports-to-select?)
+ (define (has-items? selector)
+ ;; @@: O(n)
+ ;; ... we could use hash-for-each and a continuation to jump
+ ;; out with a #t at first indication of an item
+ (not (= (hash-count (const #t)
+ (selector agenda))
+ 0)))
+ (or (has-items? agenda-read-port-map)
+ (has-items? agenda-write-port-map)
+ (has-items? agenda-except-port-map)))
+
+ (if (ports-to-select?)
+ (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
+ (get-time gettimeofday)
+ (handle-ports update-agenda-from-select!))
+ ;; TODO: Document fields
+ "Start up the AGENDA"
+ (let loop ((agenda agenda))
+ (let ((agenda
+ ;; @@: Hm, maybe here would be a great place to handle
+ ;; select'ing on ports.
+ ;; We could compose over agenda-run-once and agenda-read-ports
+ (agenda-run-once agenda)))
+ (if (and stop-condition (stop-condition agenda))
+ 'done
+ (let* ((agenda
+ ;; We have to update the time after ports handled, too
+ ;; because it may have changed after a select
+ (set-field
+ (handle-ports
+ ;; 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 agenda (agenda-time) (get-time)))
+ (agenda-time) (get-time))))
+ ;; Update the agenda's current queue based on
+ ;; currently applicable time segments
+ (add-segments-contents-to-queue!
+ (schedule-extract-until! (agenda-schedule agenda) (agenda-time agenda))
+ (agenda-queue agenda))
+ (loop agenda))))))
+
+(define (print-error-and-continue key . args)
+ "Frequently used as pre-unwind-handler for agenda"
+ (cond
+ ((eq? key '8sync-caught-error)
+ (match args
+ ((orig-key orig-args stacks)
+ (display "\n*** Caught async exception. ***\n")
+ (format (current-error-port)
+ "* Original key '~s and arguments: ~s *\n"
+ orig-key orig-args)
+ (display "* Caught stacks below (ending with original) *\n\n")
+ (for-each
+ (lambda (s)
+ (display-backtrace s (current-error-port))
+ (newline (current-error-port)))
+ stacks))))
+ (else
+ (format (current-error-port)
+ "\n*** Caught exception with key '~s and arguments: ~s ***\n"
+ key args)
+ (display-backtrace (make-stack #t 1 0)
+ (current-error-port))
+ (newline (current-error-port)))))
+
+(define-syntax-rule (maybe-catch-all (catch-handler pre-unwind-handler)
+ body ...)
+ (if (or catch-handler pre-unwind-handler)
+ (catch
+ #t
+ (lambda ()
+ body ...)
+ (or catch-handler (lambda _ #f))
+ (or pre-unwind-handler (lambda _ #f)))
+ (begin body ...)))
+
+(define (agenda-run-once agenda)
+ "Run once through the agenda, and produce a new agenda
+based on the results"
+ (define (call-proc proc)
+ (call-with-prompt
+ (agenda-prompt-tag agenda)
+ (lambda ()
+ (parameterize ((%current-agenda agenda))
+ (maybe-catch-all
+ ((agenda-catch-handler agenda)
+ (agenda-pre-unwind-handler agenda))
+ (proc))))
+ (lambda (kont async-request)
+ (setup-async-request kont async-request))))
+
+ (let ((queue (agenda-queue agenda))
+ (next-queue (make-q)))
+ (while (not (q-empty? queue))
+ (let* ((proc (q-pop! queue))
+ (proc-result (call-proc proc))
+ (enqueue
+ (lambda (run-request)
+ (define (schedule-at! time proc)
+ (schedule-add! (agenda-schedule agenda) time proc))
+ (let ((request-time (run-request-when run-request)))
+ (match request-time
+ ((? time-delta? time-delta)
+ (let ((time (time-delta+ (agenda-time agenda)
+ time-delta)))
+ (schedule-at! time (run-request-proc run-request))))
+ ((? integer? sec)
+ (let ((time (cons sec 0)))
+ (schedule-at! time (run-request-proc run-request))))
+ (((? integer? sec) . (? integer? usec))
+ (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
+ ((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
+ (set-field agenda (agenda-queue) next-queue)))
--- /dev/null
+;;; 8sync --- Asynchronous programming for Guile
+;;; Copyright (C) 2015 Christopher Allan Webber <cwebber@dustycloud.org>
+;;;
+;;; This file is part of 8sync.
+;;;
+;;; 8sync is free software: you can redistribute it and/or modify it
+;;; under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation, either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; 8sync is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU Lesser General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with 8sync. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (8sync repl)
+ #:use-module (ice-9 q)
+ #:use-module (8sync agenda)
+ #:use-module (system repl coop-server)
+ #:export (make-coop-server-handler
+ spawn-and-queue-repl-server!))
+
+(define (make-coop-server-handler coop-server)
+ (define (run-self)
+ (poll-coop-repl-server coop-server)
+ ;; queue ourselves again
+ (run-delay (run-self) (/ 1 30)))
+ run-self)
+
+(define* (spawn-and-queue-repl-server! agenda #:optional port)
+ (let ((coop-server
+ (if port
+ (spawn-coop-repl-server port)
+ (spawn-coop-repl-server))))
+ (enq! (agenda-queue agenda)
+ (make-coop-server-handler coop-server))))
--- /dev/null
+#!/usr/bin/guile \
+-e main -s
+!#
+
+;;; 8sync --- Asynchronous programming for Guile
+;;; Copyright (C) 2015 Christopher Allan Webber <cwebber@dustycloud.org>
+;;;
+;;; This file is part of 8sync.
+;;;
+;;; 8sync is free software: you can redistribute it and/or modify it
+;;; under the terms of the GNU Lesser General Public License as
+;;; published by the Free Software Foundation, either version 3 of the
+;;; License, or (at your option) any later version.
+;;;
+;;; 8sync is distributed in the hope that it will be useful,
+;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
+;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+;;; GNU Lesser General Public License for more details.
+;;;
+;;; You should have received a copy of the GNU Lesser General Public
+;;; License along with 8sync. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (8sync systems irc)
+ #:use-module (8sync repl)
+ #:use-module (8sync agenda)
+ #:use-module (srfi srfi-9)
+ #:use-module (ice-9 getopt-long)
+ #:use-module (ice-9 format)
+ #:use-module (ice-9 receive)
+ #:use-module (ice-9 q)
+ #:use-module (ice-9 match)
+ #:export (;; The only things you definitely need if writing a bot
+ make-irc-bot-cli
+ irc-format irc-display irc-send-message irc-send-formatted
+
+ ;; Useful things if you're making something more complicated
+ irc-line
+ irc-eol
+
+ default-irc-port
+
+ startswith-colon?
+
+ <irc-line>
+ make-irc-line irc-line?
+ irc-line-prefix irc-line-command irc-line-params
+
+ parse-line
+ irc-line-username
+
+ condense-privmsg-line
+ echo-back-message
+
+ make-handle-line make-basic-irc-handler
+ queue-and-start-irc-agenda!))
+
+\f
+;;; Network stuff
+;;; =============
+
+(define default-irc-port 6665)
+
+(define* (irc-socket-setup hostname #:optional (inet-port default-irc-port))
+ (let ((s (socket PF_INET SOCK_STREAM 0))
+ (ip-address (inet-ntoa (car (hostent:addr-list (gethost hostname))))))
+ (connect s AF_INET
+ (inet-pton AF_INET ip-address)
+ inet-port)
+ s))
+
+(define (install-socket socket handler)
+ (display "Installing socket...\n") ; debugging :)
+ (make-port-request socket #:read handler))
+
+(define irc-eol "\r\n")
+
+(define (irc-line line)
+ (string-concatenate (list line irc-eol)))
+
+(define-syntax-rule (irc-format dest format-string rest ...)
+ (let ((line (string-concatenate
+ (list (format #f format-string rest ...)
+ irc-eol))))
+ (match dest
+ (#f line)
+ (#t (display line))
+ (else
+ (display line dest)))))
+
+(define* (irc-display line #:optional dest)
+ (if dest
+ (display (irc-line line) dest)
+ (display (irc-line dest))))
+
+(define (irc-send-message socket channel message)
+ (irc-format socket "PRIVMSG ~a :~a" channel message))
+
+(define-syntax-rule (irc-send-formatted socket channel format-string
+ args ...)
+ (irc-format socket "PRIVMSG ~a :~a" channel
+ (format #f format-string args ...)))
+
+(define* (handle-login socket username
+ #:key
+ (hostname "*")
+ (servername "*")
+ (realname username)
+ (channels '()))
+ (irc-format socket "USER ~a ~a ~a :~a"
+ username hostname servername realname)
+ (irc-format socket "NICK ~a" username)
+ (for-each
+ (lambda (channel)
+ (irc-format socket "JOIN ~a" channel))
+ channels))
+
+(define (startswith-colon? str)
+ (and (> (string-length str) 0)
+ (eq? (string-ref str 0)
+ #\:)))
+
+(define-record-type <irc-line>
+ (make-irc-line prefix command params)
+ irc-line?
+ (prefix irc-line-prefix)
+ (command irc-line-command)
+ (params irc-line-params))
+
+
+(define (parse-line line)
+ (define (parse-params pre-params)
+ ;; This is stupid and imperative but I can't wrap my brain around
+ ;; the right way to do it in a functional way :\
+ (let ((param-list '())
+ (currently-building '()))
+ (for-each
+ (lambda (param-item)
+ (cond
+ ((startswith-colon? param-item)
+ (if (not (eq? currently-building '()))
+ (set! param-list
+ (cons
+ (reverse currently-building)
+ param-list)))
+ (set! currently-building (list param-item)))
+ (else
+ (set! currently-building (cons param-item currently-building)))))
+ pre-params)
+ ;; We're still building something, so tack that on there
+ (if (not (eq? currently-building '()))
+ (set! param-list
+ (cons (reverse currently-building) param-list)))
+ ;; return the reverse of the param list
+ (reverse param-list)))
+
+ (match (string-split line #\space)
+ (((? startswith-colon? prefix)
+ command
+ pre-params ...)
+ (make-irc-line prefix command
+ (parse-params pre-params)))
+ ((command pre-params ...)
+ (make-irc-line #f command
+ (parse-params pre-params)))))
+
+(define (strip-colon-if-necessary string)
+ (if (and (> (string-length string) 0)
+ (string-ref string 0))
+ (substring/copy string 1)
+ string))
+
+;; @@: Not sure if this works in all cases, like what about in a non-privmsg one?
+(define (irc-line-username irc-line)
+ (let* ((prefix-name (strip-colon-if-necessary (irc-line-prefix irc-line)))
+ (exclaim-index (string-index prefix-name #\!)))
+ (if exclaim-index
+ (substring/copy prefix-name 0 exclaim-index)
+ prefix-name)))
+
+(define (condense-privmsg-line line)
+ "Condense message line and do multiple value return of
+ (channel message is-action)"
+ (define (strip-last-char string)
+ (substring/copy string 0 (- (string-length string) 1)))
+ (let* ((channel-name (caar line))
+ (rest-params (apply append (cdr line))))
+ (match rest-params
+ (((or "\x01ACTION" ":\x01ACTION") middle-words ... (= strip-last-char last-word))
+ (values channel-name
+ (string-join
+ (append middle-words (list last-word))
+ " ")
+ #t))
+ (((= strip-colon-if-necessary first-word) rest-message ...)
+ (values channel-name
+ (string-join (cons first-word rest-message) " ")
+ #f)))))
+
+(define (echo-back-message socket my-name speaker
+ channel-name message is-action)
+ (if is-action
+ (format #t "~a emoted ~s in channel ~a\n"
+ speaker message channel-name)
+ (format #t "~a said ~s in channel ~a\n"
+ speaker message channel-name)))
+
+(define default-handle-privmsg echo-back-message)
+
+(define* (make-handle-line #:key
+ (handle-privmsg default-handle-privmsg))
+ (define (handle-line socket line my-username)
+ (let ((parsed-line (parse-line line)))
+ (match (irc-line-command parsed-line)
+ ("PING"
+ (irc-display "PONG" socket))
+ ("PRIVMSG"
+ (receive (channel-name message is-action)
+ (condense-privmsg-line (irc-line-params parsed-line))
+ (let ((username (irc-line-username parsed-line)))
+ (handle-privmsg socket my-username username
+ channel-name message is-action))))
+ (_
+ (display line)
+ (newline)))))
+ handle-line)
+
+(define (make-basic-irc-handler handle-line username)
+ (let ((buffer '()))
+ (define (reset-buffer)
+ (set! buffer '()))
+ (define (should-read-char socket)
+ (and (char-ready? socket) (not (eof-object? (peek-char socket)))))
+ (define (irc-handler socket)
+ (while (should-read-char socket)
+ (set! buffer (cons (read-char socket) buffer))
+ (match buffer
+ ((#\newline #\return (? char? line-chars) ...)
+ (let ((ready-line (list->string (reverse line-chars))))
+ ;; reset buffer
+ (set! buffer '())
+ ;; run it
+ (%8sync (%run (handle-line
+ socket
+ ready-line
+ username)))))
+ (_ #f))))
+ irc-handler))
+
+(define default-line-handler (make-handle-line))
+
+(define* (queue-and-start-irc-agenda! agenda socket #:key
+ (username "syncbot")
+ (inet-port default-irc-port)
+ (line-handler default-line-handler)
+ (channels '()))
+ (dynamic-wind
+ (lambda () #f)
+ (lambda ()
+ (enq! (agenda-queue agenda)
+ (wrap (install-socket
+ socket
+ (make-basic-irc-handler
+ line-handler
+ username))))
+ (enq! (agenda-queue agenda) (wrap (handle-login socket username
+ #:channels channels)))
+ (start-agenda agenda))
+ (lambda ()
+ (display "Cleaning up...\n")
+ (close socket))))
+
+
+\f
+;;; CLI
+;;; ===
+
+(define option-spec
+ `((server (single-char #\s) (required? #t) (value #t))
+ (port (single-char #\p)
+ (value #t)
+ (predicate
+ ,(lambda (s)
+ (if (string->number s) #t #f))))
+ (username (single-char #\u) (required? #t) (value #t))
+ (channels (value #t))
+ (listen)))
+
+(define* (make-irc-bot-cli #:optional
+ (line-handler default-line-handler)
+ (print-and-continue-on-error #t))
+ (define (main args)
+ (let* ((options (getopt-long args option-spec))
+ (hostname (option-ref options 'server #f))
+ (port (or (option-ref options 'port #f)
+ default-irc-port))
+ (username (option-ref options 'username #f))
+ (listen (option-ref options 'listen #f))
+ (channels (option-ref options 'channels ""))
+ (agenda (if print-and-continue-on-error
+ (make-agenda #:pre-unwind-handler print-error-and-continue)
+ (make-agenda))))
+ (display `((server ,hostname) (port ,port) (username ,username)
+ (listen ,listen) (channels-split ,(string-split channels #\space))))
+ (newline)
+ (if listen
+ (spawn-and-queue-repl-server! agenda))
+ (queue-and-start-irc-agenda!
+ agenda
+ (irc-socket-setup hostname port)
+ #:inet-port port
+ #:username username
+ #:channels (string-split channels #\space)
+ #:line-handler line-handler)))
+ main)
+
+(define main (make-irc-bot-cli))
godir=$(libdir)/guile/2.0/ccache
SOURCES = \
- eightsync/agenda.scm \
- eightsync/repl.scm \
- eightsync/systems/irc.scm
+ 8sync/agenda.scm \
+ 8sync/repl.scm \
+ 8sync/systems/irc.scm
TESTS = \
;;; You should have received a copy of the GNU Lesser General Public
;;; License along with 8sync. If not, see <http://www.gnu.org/licenses/>.
-(use-modules (eightsync systems irc)
- (eightsync agenda)
+(use-modules (8sync systems irc)
+ (8sync agenda)
(ice-9 match))
(define (handle-message socket my-name speaker
+++ /dev/null
-;;; 8sync --- Asynchronous programming for Guile
-;;; Copyright (C) 2015 Christopher Allan Webber <cwebber@dustycloud.org>
-;;;
-;;; This file is part of 8sync.
-;;;
-;;; 8sync is free software: you can redistribute it and/or modify it
-;;; under the terms of the GNU Lesser General Public License as
-;;; published by the Free Software Foundation, either version 3 of the
-;;; License, or (at your option) any later version.
-;;;
-;;; 8sync is distributed in the hope that it will be useful,
-;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;;; GNU Lesser General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU Lesser General Public
-;;; License along with 8sync. If not, see <http://www.gnu.org/licenses/>.
-
-(define-module (eightsync agenda)
- #:use-module (srfi srfi-1)
- #:use-module (srfi srfi-9)
- #:use-module (srfi srfi-9 gnu)
- #:use-module (ice-9 q)
- #:use-module (ice-9 match)
- #:use-module (ice-9 receive)
- #:export (<agenda>
- make-agenda agenda?
- agenda-queue agenda-prompt-tag
- agenda-read-port-map agenda-write-port-map agenda-except-port-map
- agenda-schedule
-
- make-async-prompt-tag
-
- list->q make-q*
-
- <time-segment>
- make-time-segment time-segment?
- time-segment-time time-segment-queue
-
- time< time= time<= time-delta+
- time-minus time-plus
-
- <time-delta>
- make-time-delta tdelta time-delta?
- time-delta-sec time-delta-usec
-
- <schedule>
- make-schedule schedule?
- schedule-add! schedule-empty?
- schedule-segments
- schedule-soonest-time
-
- 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
-
- <port-request>
- make-port-request port-request port-request?
- port-request-port
- port-request-read port-request-write port-request-except
-
- run-it wrap wrap-apply run run-at run-delay
-
- %port-request %run %run-at %run-delay
-
- catch-8sync catch-%8sync
-
- ;; used for introspecting the error, but a method for making
- ;; is not exposed
- wrapped-exception?
- wrapped-exception-key wrapped-exception-args
- wrapped-exception-stacks
-
- print-error-and-continue
-
- %current-agenda
- start-agenda agenda-run-once))
-
-;; @@: Using immutable agendas here, so wouldn't it make sense to
-;; replace this queue stuff with using pfds based immutable queues?
-
-\f
-;;; Agenda definition
-;;; =================
-
-;;; The agenda consists of:
-;;; - a queue of immediate items to handle
-;;; - sheduled future events to be added to a future queue
-;;; - a tag by which running processes can escape for some asynchronous
-;;; operation (from which they can be returned later)
-;;; - a mapping of ports to various handler procedures
-;;;
-;;; The goal, eventually, is for this all to be immutable and functional.
-;;; However, we aren't there yet. Some tricky things:
-;;; - The schedule needs to be immutable, yet reasonably efficient.
-;;; - Need to use immutable queues (ijp's pfds library?)
-;;; - Modeling reading from ports as something repeatable,
-;;; and with reasonable separation from functional components?
-
-(define-immutable-record-type <agenda>
- (make-agenda-intern queue prompt-tag
- read-port-map write-port-map except-port-map
- schedule time catch-handler pre-unwind-handler)
- agenda?
- (queue agenda-queue)
- (prompt-tag agenda-prompt-tag)
- (read-port-map agenda-read-port-map)
- (write-port-map agenda-write-port-map)
- (except-port-map agenda-except-port-map)
- (schedule agenda-schedule)
- (time agenda-time)
- (catch-handler agenda-catch-handler)
- (pre-unwind-handler agenda-pre-unwind-handler))
-
-(define (make-async-prompt-tag)
- "Make an async prompt tag for an agenda.
-
-Generally done automatically for the user through (make-agenda)."
- (make-prompt-tag "prompt"))
-
-(define* (make-agenda #:key
- (queue (make-q))
- (prompt (make-prompt-tag))
- (read-port-map (make-hash-table))
- (write-port-map (make-hash-table))
- (except-port-map (make-hash-table))
- (schedule (make-schedule))
- (time (gettimeofday))
- (catch-handler #f)
- (pre-unwind-handler #f))
- ;; TODO: document arguments
- "Make a fresh agenda."
- (make-agenda-intern queue prompt
- read-port-map write-port-map except-port-map
- schedule time
- catch-handler pre-unwind-handler))
-
-(define (current-agenda-prompt)
- "Get the prompt for the current agenda; signal an error if there isn't one."
- (let ((current-agenda (%current-agenda)))
- (if (not current-agenda)
- (throw
- 'no-current-agenda
- "Can't get current agenda prompt if there's no current agenda!")
- (agenda-prompt-tag current-agenda))))
-
-;; helper for making queues for an agenda
-(define (list->q lst)
- "Makes a queue composed of LST items"
- (let ((q (make-q)))
- (for-each
- (lambda (x)
- (enq! q x))
- lst)
- q))
-
-(define (make-q* . args)
- "Makes a queue and populates it with this invocation's ARGS"
- (list->q args))
-
-\f
-;;; Schedule
-;;; ========
-
-;;; This is where we handle timed events for the future
-
-;; This section totally borrows from the ideas in SICP
-;; <3 <3 <3
-
-;; NOTE: time is a cons of (seconds . microseconds)
-
-(define-record-type <time-segment>
- (make-time-segment-intern time queue)
- time-segment?
- (time time-segment-time)
- (queue time-segment-queue))
-
-;; @@: This seems to be the same as srfi-18's seconds->time procedure?
-;; Maybe double check and switch to that? (Thanks amz3!)
-
-(define (time-from-float-or-fraction time)
- "Produce a (sec . usec) pair from TIME, a float or fraction"
- (let* ((mixed-whole (floor time))
- (mixed-rest (- time mixed-whole)) ; float or fraction component
- (sec mixed-whole)
- (usec (floor (* 1000000 mixed-rest))))
- (cons (inexact->exact sec) (inexact->exact usec))))
-
-(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)
- ;; time was just an integer (just the second)
- ((? integer? _) (cons time 0))
- ((or (? rational? _) (? inexact? _))
- (time-from-float-or-fraction 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)
- ((and (= (car time1)
- (car time2))
- (< (cdr time1)
- (cdr 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)))
-
-
-(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 time)
- "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 to delay computation"
- (match (time-segment-right-format time)
- ((sec . usec)
- (make-time-delta-intern sec usec))))
-
-(define tdelta make-time-delta)
-
-(define (time-carry-correct time)
- "Corrects/handles time microsecond carry.
-Will produce (0 . 0) instead of a negative number, if needed."
- (cond ((>= (cdr time) 1000000)
- (cons
- (+ (car time) 1)
- (- (cdr time) 1000000)))
- ((< (cdr time) 0)
- (if (= (car time) 0)
- '(0 0)
- (cons
- (- (car time) 1)
- (+ (cdr time) 1000000))))
- (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 time1) (cdr time2)))))
-
-(define (time-plus time1 time2)
- "Add TIME1 and TIME2"
- (time-carry-correct
- (cons (+ (car time1) (car time2))
- (+ (cdr time1) (cdr time2)))))
-
-
-(define-record-type <schedule>
- (make-schedule-intern segments)
- schedule?
- (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)
- "Return a cons of (sec . usec) for next time segement, or #f if none"
- (let ((segments (schedule-segments schedule)))
- (if (eq? segments '())
- #f
- (time-segment-time (car segments)))))
-
-;; TODO: This code is reasonably easy to read but it
-;; mutates AND is worst case of O(n) in both space and time :(
-;; 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
- (make-time-segment time)))
- (enq! (time-segment-queue new-segment) proc)
- new-segment))
- (define (loop segments)
- (define (segment-equals-time? segment)
- (time= time (time-segment-time segment)))
-
- (define (segment-more-than-time? segment)
- (time< time (time-segment-time segment)))
-
- ;; We could switch this out to be more mutate'y
- ;; and avoid the O(n) of space... is that over-optimizing?
- (match segments
- ;; If we're at the end of the list, time to make a new
- ;; segment...
- ('() (cons (new-time-segment) '()))
- ;; If the segment's time is exactly our time, good news
- ;; everyone! Let's append our stuff to its queue
- (((? segment-equals-time? first) rest ...)
- (enq! (time-segment-queue first) proc)
- segments)
- ;; If the first segment is more than our time,
- ;; ours belongs before this one, so add it and
- ;; start consing our way back
- (((? segment-more-than-time? first) rest ...)
- (cons (new-time-segment) segments))
- ;; Otherwise, build up recursive result
- ((first rest ... )
- (cons first (loop rest)))))
- (set-schedule-segments!
- schedule
- (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)
- "Does a multiple value return of time segments before/at and after TIME"
- (let ((time (time-segment-right-format time)))
- (define (segment-is-now? segment)
- (time= (time-segment-time segment) time))
- (define (segment-is-before-now? segment)
- (time< (time-segment-time segment) time))
-
- (let loop ((segments-before '())
- (segments-left (schedule-segments schedule)))
- (match segments-left
- ;; end of the line, return
- ('()
- (values (reverse segments-before) '()))
-
- ;; It's right now, so time to stop, but include this one in before
- ;; but otherwise return
- (((? segment-is-now? first) rest ...)
- (values (reverse (cons first segments-before)) rest))
-
- ;; This is prior or at now, so add it and keep going
- (((? segment-is-before-now? first) rest ...)
- (loop (cons first segments-before) rest))
-
- ;; Otherwise it's past now, just return what we have
- (segments-after
- (values segments-before segments-after))))))
-
-(define (schedule-extract-until! schedule time)
- "Extract all segments until TIME from SCHEDULE, and pop old segments off"
- (receive (segments-before segments-after)
- (schedule-segments-split schedule time)
- (set-schedule-segments! schedule segments-after)
- segments-before))
-
-(define (add-segments-contents-to-queue! segments queue)
- (for-each
- (lambda (segment)
- (let ((seg-queue (time-segment-queue segment)))
- (while (not (q-empty? seg-queue))
- (enq! queue (deq! seg-queue)))))
- segments))
-
-
-\f
-;;; Request to run stuff
-;;; ====================
-
-(define-record-type <run-request>
- (make-run-request proc when)
- run-request?
- (proc run-request-proc)
- (when run-request-when))
-
-(define* (run-it proc #:optional when)
- "Make a request to run PROC (possibly at WHEN)"
- (make-run-request proc when))
-
-(define-syntax-rule (wrap body ...)
- "Wrap contents in a procedure"
- (lambda ()
- body ...))
-
-(define-syntax-rule (wrap-apply body)
- "Wrap possibly multi-value function in a procedure, applies all arguments"
- (lambda args
- (apply body args)))
-
-
-;; @@: Do we really want `body ...' here?
-;; what about just `body'?
-(define-syntax-rule (run body ...)
- "Run everything in BODY but wrap in a convenient procedure"
- (make-run-request (wrap body ...) #f))
-
-(define-syntax-rule (run-at body ... when)
- "Run BODY at WHEN"
- (make-run-request (wrap body ...) when))
-
-;; @@: Is it okay to overload the term "delay" like this?
-;; Would `run-in' be better?
-(define-syntax-rule (run-delay body ... delay-time)
- "Run BODY at DELAY-TIME time from now"
- (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))
-
-(define port-request make-port-request)
-
-
-\f
-;;; 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)))
-
-;; 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."
- (cons '*async-request* proc))
-
-(define (setup-async-request resume-kont async-request)
- "Complete an async request for agenda-run-once's continuation handling"
- (match async-request
- (('*async-request* . async-setup-proc)
- (async-setup-proc resume-kont))
- ;; TODO: deliver more helpful errors depending on what the user
- ;; returned
- (_ (throw 'invalid-async-request
- "Invalid request passed back via an (%8sync) procedure."
- async-request))))
-
-(define-record-type <wrapped-exception>
- (make-wrapped-exception key args stacks)
- wrapped-exception?
- (key wrapped-exception-key)
- (args wrapped-exception-args)
- (stacks wrapped-exception-stacks))
-
-(define-syntax-rule (propagate-%async-exceptions body)
- (let ((body-result body))
- (if (wrapped-exception? body-result)
- (throw '8sync-caught-error
- (wrapped-exception-key body-result)
- (wrapped-exception-args body-result)
- (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 add-this-port port-request-args ...)
- (make-async-request
- (lambda (kont)
- (list (make-port-request port-request-args ...)
- (make-run-request kont)))))
-
-;; TODO
-(define-syntax-rule (%run-with-return return body ...)
- (make-async-request
- (lambda (kont)
- (let ((return kont))
- (lambda ()
- body ...)))))
-
-(define-syntax-rule (catch-8sync exp (handler-key handler) ...)
- (catch '8sync-caught-error
- (lambda ()
- exp)
- (lambda (_ orig-key orig-args orig-stacks)
- (cond
- ((or (eq? handler-key #t)
- (eq? orig-key handler-key))
- (apply handler orig-stacks orig-args)) ...
- (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
-;;; =======================================
-
-(define %current-agenda (make-parameter #f))
-
-(define (update-agenda-from-select! agenda)
- "Potentially (select) on ports specified in agenda, adding items to queue"
- (define (hash-keys hash)
- (hash-map->list (lambda (k v) k) hash))
- (define (get-wait-time)
- ;; TODO: we need to figure this out based on whether there's anything
- ;; in the queue, and if not, how long till the next scheduled item
- (let ((soonest-time (schedule-soonest-time (agenda-schedule agenda))))
- (cond
- ((not (q-empty? (agenda-queue agenda)))
- (cons 0 0))
- (soonest-time ; ie, the agenda is non-empty
- (let* ((current-time (agenda-time agenda)))
- (if (time<= soonest-time current-time)
- ;; Well there's something due so let's select
- ;; (this avoids a (possible?) race condition chance)
- (cons 0 0)
- (time-minus soonest-time current-time))))
- (else
- (cons #f #f)))))
- (define (do-select)
- ;; TODO: support usecond wait time too
- (match (get-wait-time)
- ((sec . usec)
- (catch 'system-error
- (lambda ()
- (select (hash-keys (agenda-read-port-map agenda))
- (hash-keys (agenda-write-port-map agenda))
- (hash-keys (agenda-except-port-map agenda))
- sec usec))
- (lambda (key . rest-args)
- (match rest-args
- ((_ _ _ (EINTR))
- '(() () ()))
- (_ (error "Unhandled error in select!" key rest-args))))))))
- (define (get-procs-to-run)
- (define (ports->procs ports port-map)
- (lambda (initial-procs)
- (fold
- (lambda (port prev)
- (cons (lambda ()
- ((hash-ref port-map port) port))
- prev))
- initial-procs
- ports)))
- (match (do-select)
- ((read-ports write-ports except-ports)
- ;; @@: Come on, we can do better than append ;P
- ((compose (ports->procs
- read-ports
- (agenda-read-port-map agenda))
- (ports->procs
- write-ports
- (agenda-write-port-map agenda))
- (ports->procs
- except-ports
- (agenda-except-port-map agenda)))
- '()))))
- (define (update-agenda)
- (let ((procs-to-run (get-procs-to-run))
- (q (agenda-queue agenda)))
- (for-each
- (lambda (proc)
- (enq! q proc))
- procs-to-run))
- agenda)
- (define (ports-to-select?)
- (define (has-items? selector)
- ;; @@: O(n)
- ;; ... we could use hash-for-each and a continuation to jump
- ;; out with a #t at first indication of an item
- (not (= (hash-count (const #t)
- (selector agenda))
- 0)))
- (or (has-items? agenda-read-port-map)
- (has-items? agenda-write-port-map)
- (has-items? agenda-except-port-map)))
-
- (if (ports-to-select?)
- (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
- (get-time gettimeofday)
- (handle-ports update-agenda-from-select!))
- ;; TODO: Document fields
- "Start up the AGENDA"
- (let loop ((agenda agenda))
- (let ((agenda
- ;; @@: Hm, maybe here would be a great place to handle
- ;; select'ing on ports.
- ;; We could compose over agenda-run-once and agenda-read-ports
- (agenda-run-once agenda)))
- (if (and stop-condition (stop-condition agenda))
- 'done
- (let* ((agenda
- ;; We have to update the time after ports handled, too
- ;; because it may have changed after a select
- (set-field
- (handle-ports
- ;; 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 agenda (agenda-time) (get-time)))
- (agenda-time) (get-time))))
- ;; Update the agenda's current queue based on
- ;; currently applicable time segments
- (add-segments-contents-to-queue!
- (schedule-extract-until! (agenda-schedule agenda) (agenda-time agenda))
- (agenda-queue agenda))
- (loop agenda))))))
-
-(define (print-error-and-continue key . args)
- "Frequently used as pre-unwind-handler for agenda"
- (cond
- ((eq? key '8sync-caught-error)
- (match args
- ((orig-key orig-args stacks)
- (display "\n*** Caught async exception. ***\n")
- (format (current-error-port)
- "* Original key '~s and arguments: ~s *\n"
- orig-key orig-args)
- (display "* Caught stacks below (ending with original) *\n\n")
- (for-each
- (lambda (s)
- (display-backtrace s (current-error-port))
- (newline (current-error-port)))
- stacks))))
- (else
- (format (current-error-port)
- "\n*** Caught exception with key '~s and arguments: ~s ***\n"
- key args)
- (display-backtrace (make-stack #t 1 0)
- (current-error-port))
- (newline (current-error-port)))))
-
-(define-syntax-rule (maybe-catch-all (catch-handler pre-unwind-handler)
- body ...)
- (if (or catch-handler pre-unwind-handler)
- (catch
- #t
- (lambda ()
- body ...)
- (or catch-handler (lambda _ #f))
- (or pre-unwind-handler (lambda _ #f)))
- (begin body ...)))
-
-(define (agenda-run-once agenda)
- "Run once through the agenda, and produce a new agenda
-based on the results"
- (define (call-proc proc)
- (call-with-prompt
- (agenda-prompt-tag agenda)
- (lambda ()
- (parameterize ((%current-agenda agenda))
- (maybe-catch-all
- ((agenda-catch-handler agenda)
- (agenda-pre-unwind-handler agenda))
- (proc))))
- (lambda (kont async-request)
- (setup-async-request kont async-request))))
-
- (let ((queue (agenda-queue agenda))
- (next-queue (make-q)))
- (while (not (q-empty? queue))
- (let* ((proc (q-pop! queue))
- (proc-result (call-proc proc))
- (enqueue
- (lambda (run-request)
- (define (schedule-at! time proc)
- (schedule-add! (agenda-schedule agenda) time proc))
- (let ((request-time (run-request-when run-request)))
- (match request-time
- ((? time-delta? time-delta)
- (let ((time (time-delta+ (agenda-time agenda)
- time-delta)))
- (schedule-at! time (run-request-proc run-request))))
- ((? integer? sec)
- (let ((time (cons sec 0)))
- (schedule-at! time (run-request-proc run-request))))
- (((? integer? sec) . (? integer? usec))
- (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
- ((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
- (set-field agenda (agenda-queue) next-queue)))
+++ /dev/null
-;;; 8sync --- Asynchronous programming for Guile
-;;; Copyright (C) 2015 Christopher Allan Webber <cwebber@dustycloud.org>
-;;;
-;;; This file is part of 8sync.
-;;;
-;;; 8sync is free software: you can redistribute it and/or modify it
-;;; under the terms of the GNU Lesser General Public License as
-;;; published by the Free Software Foundation, either version 3 of the
-;;; License, or (at your option) any later version.
-;;;
-;;; 8sync is distributed in the hope that it will be useful,
-;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;;; GNU Lesser General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU Lesser General Public
-;;; License along with 8sync. If not, see <http://www.gnu.org/licenses/>.
-
-(define-module (eightsync repl)
- #:use-module (ice-9 q)
- #:use-module (eightsync agenda)
- #:use-module (system repl coop-server)
- #:export (make-coop-server-handler
- spawn-and-queue-repl-server!))
-
-(define (make-coop-server-handler coop-server)
- (define (run-self)
- (poll-coop-repl-server coop-server)
- ;; queue ourselves again
- (run-delay (run-self) (/ 1 30)))
- run-self)
-
-(define* (spawn-and-queue-repl-server! agenda #:optional port)
- (let ((coop-server
- (if port
- (spawn-coop-repl-server port)
- (spawn-coop-repl-server))))
- (enq! (agenda-queue agenda)
- (make-coop-server-handler coop-server))))
+++ /dev/null
-#!/usr/bin/guile \
--e main -s
-!#
-
-;;; 8sync --- Asynchronous programming for Guile
-;;; Copyright (C) 2015 Christopher Allan Webber <cwebber@dustycloud.org>
-;;;
-;;; This file is part of 8sync.
-;;;
-;;; 8sync is free software: you can redistribute it and/or modify it
-;;; under the terms of the GNU Lesser General Public License as
-;;; published by the Free Software Foundation, either version 3 of the
-;;; License, or (at your option) any later version.
-;;;
-;;; 8sync is distributed in the hope that it will be useful,
-;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
-;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-;;; GNU Lesser General Public License for more details.
-;;;
-;;; You should have received a copy of the GNU Lesser General Public
-;;; License along with 8sync. If not, see <http://www.gnu.org/licenses/>.
-
-(define-module (eightsync systems irc)
- #:use-module (eightsync repl)
- #:use-module (eightsync agenda)
- #:use-module (srfi srfi-9)
- #:use-module (ice-9 getopt-long)
- #:use-module (ice-9 format)
- #:use-module (ice-9 receive)
- #:use-module (ice-9 q)
- #:use-module (ice-9 match)
- #:export (;; The only things you definitely need if writing a bot
- make-irc-bot-cli
- irc-format irc-display irc-send-message irc-send-formatted
-
- ;; Useful things if you're making something more complicated
- irc-line
- irc-eol
-
- default-irc-port
-
- startswith-colon?
-
- <irc-line>
- make-irc-line irc-line?
- irc-line-prefix irc-line-command irc-line-params
-
- parse-line
- irc-line-username
-
- condense-privmsg-line
- echo-back-message
-
- make-handle-line make-basic-irc-handler
- queue-and-start-irc-agenda!))
-
-\f
-;;; Network stuff
-;;; =============
-
-(define default-irc-port 6665)
-
-(define* (irc-socket-setup hostname #:optional (inet-port default-irc-port))
- (let ((s (socket PF_INET SOCK_STREAM 0))
- (ip-address (inet-ntoa (car (hostent:addr-list (gethost hostname))))))
- (connect s AF_INET
- (inet-pton AF_INET ip-address)
- inet-port)
- s))
-
-(define (install-socket socket handler)
- (display "Installing socket...\n") ; debugging :)
- (make-port-request socket #:read handler))
-
-(define irc-eol "\r\n")
-
-(define (irc-line line)
- (string-concatenate (list line irc-eol)))
-
-(define-syntax-rule (irc-format dest format-string rest ...)
- (let ((line (string-concatenate
- (list (format #f format-string rest ...)
- irc-eol))))
- (match dest
- (#f line)
- (#t (display line))
- (else
- (display line dest)))))
-
-(define* (irc-display line #:optional dest)
- (if dest
- (display (irc-line line) dest)
- (display (irc-line dest))))
-
-(define (irc-send-message socket channel message)
- (irc-format socket "PRIVMSG ~a :~a" channel message))
-
-(define-syntax-rule (irc-send-formatted socket channel format-string
- args ...)
- (irc-format socket "PRIVMSG ~a :~a" channel
- (format #f format-string args ...)))
-
-(define* (handle-login socket username
- #:key
- (hostname "*")
- (servername "*")
- (realname username)
- (channels '()))
- (irc-format socket "USER ~a ~a ~a :~a"
- username hostname servername realname)
- (irc-format socket "NICK ~a" username)
- (for-each
- (lambda (channel)
- (irc-format socket "JOIN ~a" channel))
- channels))
-
-(define (startswith-colon? str)
- (and (> (string-length str) 0)
- (eq? (string-ref str 0)
- #\:)))
-
-(define-record-type <irc-line>
- (make-irc-line prefix command params)
- irc-line?
- (prefix irc-line-prefix)
- (command irc-line-command)
- (params irc-line-params))
-
-
-(define (parse-line line)
- (define (parse-params pre-params)
- ;; This is stupid and imperative but I can't wrap my brain around
- ;; the right way to do it in a functional way :\
- (let ((param-list '())
- (currently-building '()))
- (for-each
- (lambda (param-item)
- (cond
- ((startswith-colon? param-item)
- (if (not (eq? currently-building '()))
- (set! param-list
- (cons
- (reverse currently-building)
- param-list)))
- (set! currently-building (list param-item)))
- (else
- (set! currently-building (cons param-item currently-building)))))
- pre-params)
- ;; We're still building something, so tack that on there
- (if (not (eq? currently-building '()))
- (set! param-list
- (cons (reverse currently-building) param-list)))
- ;; return the reverse of the param list
- (reverse param-list)))
-
- (match (string-split line #\space)
- (((? startswith-colon? prefix)
- command
- pre-params ...)
- (make-irc-line prefix command
- (parse-params pre-params)))
- ((command pre-params ...)
- (make-irc-line #f command
- (parse-params pre-params)))))
-
-(define (strip-colon-if-necessary string)
- (if (and (> (string-length string) 0)
- (string-ref string 0))
- (substring/copy string 1)
- string))
-
-;; @@: Not sure if this works in all cases, like what about in a non-privmsg one?
-(define (irc-line-username irc-line)
- (let* ((prefix-name (strip-colon-if-necessary (irc-line-prefix irc-line)))
- (exclaim-index (string-index prefix-name #\!)))
- (if exclaim-index
- (substring/copy prefix-name 0 exclaim-index)
- prefix-name)))
-
-(define (condense-privmsg-line line)
- "Condense message line and do multiple value return of
- (channel message is-action)"
- (define (strip-last-char string)
- (substring/copy string 0 (- (string-length string) 1)))
- (let* ((channel-name (caar line))
- (rest-params (apply append (cdr line))))
- (match rest-params
- (((or "\x01ACTION" ":\x01ACTION") middle-words ... (= strip-last-char last-word))
- (values channel-name
- (string-join
- (append middle-words (list last-word))
- " ")
- #t))
- (((= strip-colon-if-necessary first-word) rest-message ...)
- (values channel-name
- (string-join (cons first-word rest-message) " ")
- #f)))))
-
-(define (echo-back-message socket my-name speaker
- channel-name message is-action)
- (if is-action
- (format #t "~a emoted ~s in channel ~a\n"
- speaker message channel-name)
- (format #t "~a said ~s in channel ~a\n"
- speaker message channel-name)))
-
-(define default-handle-privmsg echo-back-message)
-
-(define* (make-handle-line #:key
- (handle-privmsg default-handle-privmsg))
- (define (handle-line socket line my-username)
- (let ((parsed-line (parse-line line)))
- (match (irc-line-command parsed-line)
- ("PING"
- (irc-display "PONG" socket))
- ("PRIVMSG"
- (receive (channel-name message is-action)
- (condense-privmsg-line (irc-line-params parsed-line))
- (let ((username (irc-line-username parsed-line)))
- (handle-privmsg socket my-username username
- channel-name message is-action))))
- (_
- (display line)
- (newline)))))
- handle-line)
-
-(define (make-basic-irc-handler handle-line username)
- (let ((buffer '()))
- (define (reset-buffer)
- (set! buffer '()))
- (define (should-read-char socket)
- (and (char-ready? socket) (not (eof-object? (peek-char socket)))))
- (define (irc-handler socket)
- (while (should-read-char socket)
- (set! buffer (cons (read-char socket) buffer))
- (match buffer
- ((#\newline #\return (? char? line-chars) ...)
- (let ((ready-line (list->string (reverse line-chars))))
- ;; reset buffer
- (set! buffer '())
- ;; run it
- (%8sync (%run (handle-line
- socket
- ready-line
- username)))))
- (_ #f))))
- irc-handler))
-
-(define default-line-handler (make-handle-line))
-
-(define* (queue-and-start-irc-agenda! agenda socket #:key
- (username "syncbot")
- (inet-port default-irc-port)
- (line-handler default-line-handler)
- (channels '()))
- (dynamic-wind
- (lambda () #f)
- (lambda ()
- (enq! (agenda-queue agenda)
- (wrap (install-socket
- socket
- (make-basic-irc-handler
- line-handler
- username))))
- (enq! (agenda-queue agenda) (wrap (handle-login socket username
- #:channels channels)))
- (start-agenda agenda))
- (lambda ()
- (display "Cleaning up...\n")
- (close socket))))
-
-
-\f
-;;; CLI
-;;; ===
-
-(define option-spec
- `((server (single-char #\s) (required? #t) (value #t))
- (port (single-char #\p)
- (value #t)
- (predicate
- ,(lambda (s)
- (if (string->number s) #t #f))))
- (username (single-char #\u) (required? #t) (value #t))
- (channels (value #t))
- (listen)))
-
-(define* (make-irc-bot-cli #:optional
- (line-handler default-line-handler)
- (print-and-continue-on-error #t))
- (define (main args)
- (let* ((options (getopt-long args option-spec))
- (hostname (option-ref options 'server #f))
- (port (or (option-ref options 'port #f)
- default-irc-port))
- (username (option-ref options 'username #f))
- (listen (option-ref options 'listen #f))
- (channels (option-ref options 'channels ""))
- (agenda (if print-and-continue-on-error
- (make-agenda #:pre-unwind-handler print-error-and-continue)
- (make-agenda))))
- (display `((server ,hostname) (port ,port) (username ,username)
- (listen ,listen) (channels-split ,(string-split channels #\space))))
- (newline)
- (if listen
- (spawn-and-queue-repl-server! agenda))
- (queue-and-start-irc-agenda!
- agenda
- (irc-socket-setup hostname port)
- #:inet-port port
- #:username username
- #:channels (string-split channels #\space)
- #:line-handler line-handler)))
- main)
-
-(define main (make-irc-bot-cli))
#:use-module (srfi srfi-64)
#:use-module (ice-9 q)
#:use-module (ice-9 receive)
- #:use-module (eightsync agenda)
+ #:use-module (8sync agenda)
#:use-module (tests utils))
(test-begin "test-agenda")
(define (test-%run-and-friends async-request expected-when)
(let* ((fake-kont (speak-it))
- (run-request ((@@ (eightsync agenda) setup-async-request)
+ (run-request ((@@ (8sync agenda) setup-async-request)
fake-kont async-request)))
(test-equal (car async-request) '*async-request*)
(test-equal (run-request-when run-request) expected-when)
projects / 8sync.git / commitdiff