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janet/examples/select2.janet

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2020-10-11 14:14:31 +00:00
###
### examples/select2.janet
###
### Mix reads and writes in select.
###
(def c1 (ev/chan 40))
(def c2 (ev/chan 40))
(def c3 (ev/chan 40))
(def c4 (ev/chan 40))
(def c5 (ev/chan 4))
(defn worker
[c n x]
(forever
(ev/sleep n)
(ev/give c x)))
(defn writer-worker
[c]
(forever
(ev/sleep 0.2)
(print "writing " (ev/take c))))
(ev/call worker c1 1 :item1)
(ev/sleep 0.2)
(ev/call worker c2 1 :item2)
(ev/sleep 0.1)
(ev/call worker c3 1 :item3)
(ev/sleep 0.2)
(ev/call worker c4 1 :item4)
(ev/sleep 0.1)
(ev/call worker c4 1 :item5)
(ev/call writer-worker c5)
(forever (pp (ev/rselect c1 c2 c3 c4 [c5 :thing])))