37 lines
1.2 KiB
Racket
37 lines
1.2 KiB
Racket
#lang prospect
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;; Demonstrates quit-network.
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(require (only-in racket/port read-bytes-line-evt))
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(define (spawn-command-listener)
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(spawn (lambda (e s)
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(match e
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[(message (at-meta (at-meta (external-event _ (list #"quit")))))
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(printf "Quitting just the leaf actor.\n")
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(quit)]
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[(message (at-meta (at-meta (external-event _ (list #"quit-network")))))
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(printf "Terminating the whole network.\n")
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(transition s (quit-network))]
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[_ #f]))
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(void)
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(sub (external-event (read-bytes-line-evt (current-input-port) 'any) ?)
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#:meta-level 2)))
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(define (spawn-ticker)
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(define (sub-to-alarm)
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(sub (external-event (alarm-evt (+ (current-inexact-milliseconds) 1000)) ?) #:meta-level 2))
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(spawn (lambda (e s)
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(match e
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[(message (at-meta (at-meta (external-event _ _))))
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(printf "Tick!\n")
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(transition s
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(list (retract ?)
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(sub-to-alarm)))]
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[_ #f]))
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(void)
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(sub-to-alarm)))
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(printf "Type 'quit' or 'quit-network'.\n")
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(spawn-network (spawn-command-listener)
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(spawn-ticker))
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