40 lines
685 B
V
40 lines
685 B
V
import sync
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const (
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num_iterations = 10000
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)
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fn get_val_from_chan(ch chan i64) ?i64 {
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r := <-ch ?
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return r
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}
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// this function gets an array of channels for `i64`
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fn do_rec_calc_send(chs []chan i64, mut sem sync.Semaphore) {
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mut msg := ''
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for {
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mut s := get_val_from_chan(chs[0]) or {
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msg = err.str()
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break
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}
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s++
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chs[1] <- s
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}
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assert msg == 'channel closed'
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sem.post()
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}
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fn test_channel_array_mut() {
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mut chs := [chan i64{}, chan i64{cap: 10}]
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mut sem := sync.new_semaphore()
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go do_rec_calc_send(chs, mut sem)
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mut t := i64(100)
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for _ in 0 .. num_iterations {
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chs[0] <- t
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t = <-chs[1]
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}
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chs[0].close()
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sem.wait()
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assert t == 100 + num_iterations
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}
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