First attempt at novy syntax

This commit is contained in:
Tony Garnock-Jones 2021-06-01 10:04:10 +02:00
parent 35e1d24fde
commit 37bd64bf05
4 changed files with 262 additions and 60 deletions

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@ -3,69 +3,67 @@
(require racket/match)
(require preserves)
(require "main.rkt")
(require (except-in "main.rkt" actor-system))
(require "bag.rkt")
(require "schemas/gen/box-protocol.rkt")
(require "schemas/gen/dataspace.rkt")
(define ((box ds LIMIT REPORT_EVERY) turn)
(define value (turn-field! turn 'box-value 0))
(turn-assert/dataflow! turn ds (lambda (turn) (BoxState->preserves (BoxState (value)))))
(define start-time (current-inexact-milliseconds))
(define prev-value 0)
(turn-assert! turn ds
(Observe->preserves
(Observe 'SetBox
(turn-ref turn
(entity #:message
(lambda (turn new-value-rec)
(define new-value (SetBox-value new-value-rec))
(when (zero? (remainder new-value REPORT_EVERY))
(define end-time (current-inexact-milliseconds))
(define delta (/ (- end-time start-time) 1000.0))
(define count (- new-value prev-value))
(set! prev-value new-value)
(set! start-time end-time)
(log-info "Box got ~a (~a Hz)"
new-value
(/ count delta)))
(when (= new-value LIMIT)
(turn-stop-actor! turn))
(value new-value))))))))
(require "syntax.rkt")
(define ((client ds) turn)
(turn-assert! turn ds
(Observe->preserves
(Observe 'BoxState
(turn-ref turn
(entity #:assert
(lambda (turn current-value _handle)
;; (log-info "Client got ~a" current-value)
(turn-message! turn ds
(SetBox->preserves
(SetBox
(+ (BoxState-value current-value)
1))))))))))
(let ((count 0))
(turn-assert! turn ds
(Observe->preserves
(Observe 'BoxState
(turn-ref turn
(entity #:assert
(lambda (turn current-value _handle)
(define box
(action (ds LIMIT REPORT_EVERY)
(spawn (define root-facet this-facet)
(define-field value 0)
(define start-time (current-inexact-milliseconds))
(define prev-value 0)
(at ds
(assert (BoxState->preserves (BoxState (value))))
(when (message (SetBox new-value))
(when (zero? (remainder new-value REPORT_EVERY))
(define end-time (current-inexact-milliseconds))
(define delta (/ (- end-time start-time) 1000.0))
(define count (- new-value prev-value))
(set! prev-value new-value)
(set! start-time end-time)
(log-info "Box got ~a (~a Hz)" new-value (/ count delta)))
(when (= new-value LIMIT)
(stop-facet root-facet))
(value new-value))))))
(define client
(action (ds)
(spawn (define root-facet this-facet)
(define count 0)
(at ds
(when (asserted (BoxState value))
(send! ds (SetBox->preserves (SetBox (+ value 1)))))
;; (during (BoxState _)
;; (on-start (set! count (+ count 1)))
;; (on-stop (set! count (- count 1))
;; (when (zero? count)
;; (log-info "Client detected box termination")
;; (stop-facet root-facet))))
(assert (Observe->preserves
(Observe 'BoxState
(ref (entity #:assert
(action (_v _h)
(set! count (+ count 1)))
#:retract
(lambda (turn _handle)
(action (_h)
(set! count (- count 1))
(when (zero? count)
(log-info "Client detected box termination")
(turn-stop-actor! turn))))))))))
(stop-facet root-facet))))))))
;; (during (BoxState _)
;; (on-stop (log-info "Client detected box termination")
;; (stop-facet root-facet)))
))))
(define (dataspace)
(define handles (make-hash))
(define assertions (make-bag))
(define subscriptions (make-hash))
(entity #:assert (lambda (turn rec handle)
(entity #:assert (action (rec handle)
(when (record? rec)
(hash-set! handles handle rec)
(when (eq? (bag-change! assertions rec +1) 'absent->present)
@ -76,17 +74,17 @@
(hash-set! (hash-ref! subscriptions label make-hasheq) observer seen)
(for [(existing (in-bag assertions))]
(when (preserve=? (record-label existing) label)
(hash-set! seen existing (turn-assert! turn observer existing))))])
(hash-set! seen existing (turn-assert! this-turn observer existing))))])
(for [((observer seen) (in-hash (hash-ref subscriptions (record-label rec) '#hash())))]
(unless (hash-has-key? seen rec)
(hash-set! seen rec (turn-assert! turn observer rec)))))))
#:retract (lambda (turn upstream-handle)
(hash-set! seen rec (turn-assert! this-turn observer rec)))))))
#:retract (action (upstream-handle)
(define rec (hash-ref handles upstream-handle #f))
(when rec
(hash-remove! handles upstream-handle)
(when (eq? (bag-change! assertions rec -1) 'present->absent)
(for [(seen (in-hash-values (hash-ref subscriptions (record-label rec) '#hash())))]
(turn-retract! turn (hash-ref seen rec))
(turn-retract! this-turn (hash-ref seen rec))
(hash-remove! seen rec))
(match (parse-Observe rec)
[(? eof-object?) (void)]
@ -95,17 +93,15 @@
(hash-remove! subscribers observer)
(when (hash-empty? subscribers)
(hash-remove! subscriptions label)))]))))
#:message (lambda (turn message)
#:message (action (message)
(when (record? message)
(for [(peer (in-hash-keys (hash-ref subscriptions (record-label message) '#hash())))]
(turn-message! turn peer message))))))
(turn-message! this-turn peer message))))))
(module+ main
(time
(actor-system
(lambda (turn)
(actor-daemon! (facet-actor (turn-active-facet turn)) #t)
(define disarm (facet-prevent-inert-check! (turn-active-facet turn)))
(define ds (turn-ref turn (dataspace)))
(turn-spawn! turn (box ds 500000 100000))
(turn-spawn! turn (client ds))))))
(define disarm (facet-prevent-inert-check! this-facet))
(define ds (ref (dataspace)))
(box this-turn ds 500000 100000)
(client this-turn ds))))

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@ -4,6 +4,8 @@
(define deps '(
"base"
"auxiliary-macro-context"
"preserves"
"struct-defaults"

204
syndicate/syntax.rkt Normal file
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@ -0,0 +1,204 @@
#lang racket/base
(provide this-turn
this-facet
this-actor
action
entity
actor-system
with-fresh-turn
ref
react
define-field
stop-facet
stop-current-facet
on-start
on-stop
sync!
send!
spawn
begin/dataflow
define/dataflow
this-target
at
assert
(rename-out [event:when when])
during)
(require racket/match)
(require racket/stxparam)
(require (for-syntax racket/base))
(require (for-syntax racket/syntax))
(require "actor.rkt")
(require (prefix-in actor: "actor.rkt"))
(require "event-expander.rkt")
(define-syntax-parameter this-turn
(lambda (stx)
(raise-syntax-error #f "Illegal use outside an Actor turn" stx)))
(define-syntax-rule (with-this-turn id expr ...)
(syntax-parameterize ([this-turn (make-rename-transformer #'id)])
expr ...))
(define-syntax this-facet
(syntax-id-rules ()
[_ (turn-active-facet this-turn)]))
(define-syntax this-actor
(syntax-id-rules ()
[_ (facet-actor this-facet)]))
(define-syntax-rule (action formals expr ...)
(lambda (turn . formals)
(with-this-turn turn expr ...)))
(define-syntax-rule (actor-system expr ...)
(actor:actor-system (action () expr ...)))
(define-syntax-rule (with-fresh-turn expr ...)
(turn-freshen this-turn (action () expr ...)))
(define-syntax-rule (ref e)
(turn-ref this-turn e))
(define-syntax-rule (react setup-expr ...)
(turn-facet! this-turn (action () setup-expr ...)))
(define-syntax-rule (define-field id initial-value)
(define id (turn-field! this-turn 'id initial-value)))
(define-syntax stop-facet
(syntax-rules ()
[(_ f) (turn-stop! this-turn f)]
[(_ f expr ...) (turn-stop! this-turn f (action () expr ...))]))
(define-syntax-rule (stop-current-facet expr ...)
(stop-facet this-facet expr ...))
(define-syntax-rule (on-start expr ...)
;; TODO: delay to end of turn (?)
(begin expr ...))
(define-syntax-rule (on-stop expr ...)
(facet-on-stop! this-facet (action () expr ...)))
(define-syntax-rule (sync! peer expr ...)
(turn-sync! this-turn peer (action (_reply) expr ...)))
(define-syntax-rule (send! peer assertion)
(turn-message! this-turn peer assertion))
(define-syntax-rule (spawn setup-expr ...)
(turn-spawn! this-turn (action () setup-expr ...)))
(define-syntax-rule (begin/dataflow expr ...)
(turn-dataflow! this-turn (action () expr ...)))
(define-syntax-rule (define/dataflow id expr)
(begin (define-field id #f)
(begin/dataflow (id expr))))
;;---------------------------------------------------------------------------
(define-for-syntax orig-insp
(variable-reference->module-declaration-inspector (#%variable-reference)))
(define-syntax-parameter this-target
(lambda (stx)
(raise-syntax-error #f "Illegal use outside an Actor turn" stx)))
(define-syntax (at stx)
(syntax-case stx ()
[(_ target-expr items ...)
#`(let ((target target-expr))
(syntax-parameterize ([this-target (make-rename-transformer #'target)])
#,@(for/list [(item-stx (in-list (syntax->list #'(items ...))))]
(let loop ((item-stx item-stx))
(define disarmed-item-stx (syntax-disarm item-stx orig-insp))
(syntax-case disarmed-item-stx ()
[(expander args ...)
(event-expander-id? #'expander)
(event-expander-transform disarmed-item-stx
(lambda (r) (loop (syntax-rearm r item-stx))))]
[_
item-stx])))))]))
(define-event-expander assert
(syntax-rules ()
[(_ expr)
(turn-assert/dataflow! this-turn this-target (action () expr))]))
(require "schemas/gen/dataspace.rkt")
(define-event-expander event:when
(lambda (stx)
(syntax-case stx (message asserted)
[(_ (message (label fields ...)) expr ...)
#`(assert (Observe->preserves
(Observe 'label
(ref (entity #:message
(action (rec)
(match (#,(format-id #'label "parse-~a" (syntax-e #'label)) rec)
[(? eof-object?) (void)]
[(label fields ...)
expr ...])))))))]
[(_ (asserted (label fields ...)) expr ...)
#`(assert (Observe->preserves
(Observe 'label
(ref (entity #:assert
(action (rec handle)
(match (#,(format-id #'label "parse-~a" (syntax-e #'label)) rec)
[(? eof-object?) (void)]
[(label fields ...)
expr ...])))))))]))
(syntax-rules ()
[(_ test expr ...)
(when test expr ...)]))
(define-event-expander during
(lambda (stx)
(syntax-case stx ()
[(_ (label fields ...) expr ...)
#`(assert (Observe->preserves
(Observe 'label
(ref (let ((assertion-map (make-hash)))
(entity #:assert
(action (rec handle)
(match (#,(format-id #'label "parse-~a" (syntax-e #'label)) rec)
[(? eof-object?) (void)]
[(label fields ...)
(let ((facet (react
(facet-prevent-inert-check! this-facet)
expr ...)))
(match (hash-ref assertion-map handle #f)
[#f
(hash-set! assertion-map handle facet)]
['dead
(hash-remove! assertion-map handle)
(stop-facet facet)]
[_
(error 'during "Duplicate assertion handle ~a" handle)]))]))
#:retract
(action (handle)
(match (hash-ref assertion-map handle #f)
[#f
(hash-set! assertion-map handle 'dead)]
['dead
(error 'during "Duplicate retraction handle ~a" handle)]
[facet
(hash-remove! assertion-map handle)
(stop-facet facet)]))))))))])))
;;---------------------------------------------------------------------------
;;; Local Variables:
;;; eval: (put 'action 'scheme-indent-function 1)
;;; eval: (put 'action 'racket-indent-function 1)
;;; End: