70 lines
1.9 KiB
Racket
70 lines
1.9 KiB
Racket
#lang syndicate
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(require "../endpoint.rkt")
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(require "../drivers/timer.rkt")
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(spawn-timer-driver)
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(define ((log-it eid) e u)
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(log-info "endpoint ~a state ~a: ~v" eid u e)
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(and e (transition (+ u 1)
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(if (equal? e (message 2))
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(if (equal? eid 0)
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(list (unsub 2) (sub 5) (as-endpoint 1 (delete-endpoint)))
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(list (unsub 2) (sub 5)))
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'()))))
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(spawn (lambda (e u)
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(when (message? e) (log-info "general: ~v" e))
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#f)
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(void)
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(patch-seq (sub ?)
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(unsub (observe ?))
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(unsub (at-meta ?))))
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(spawn-endpoint-group 0
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(add-endpoint
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(lambda (eid state)
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(values (log-it eid)
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(transition state
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(list (sub 1)
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(sub 2))))))
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(add-endpoint
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(lambda (eid state)
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(values (log-it eid)
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(transition state
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(list (sub 3)
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(sub 2)))))))
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(define (after msec thunk)
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(define id (gensym 'after))
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(if (zero? msec)
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(thunk)
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(list
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(spawn (lambda (e s) (and (message? e) (quit (thunk))))
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(void)
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(sub (timer-expired id ?)))
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(message (set-timer id msec 'relative)))))
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(after 100
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(lambda ()
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(list
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(message 0)
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(message 1)
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(message 2)
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(message 3)
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(message 4)
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(message 5)
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(message 6))))
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(after 100
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(lambda ()
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(list
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(message 0)
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(message 1)
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(message 2)
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(message 3)
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(message 4)
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(message 5)
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(message 6))))
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