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v/vlib/sync/channel_4_test.v

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2020-08-06 16:28:19 +03:00
import sync
fn do_rec(mut ch sync.Channel, mut resch sync.Channel) {
mut sum := i64(0)
for _ in 0 .. 2000 {
mut a := 0
ch.pop(&a)
sum += a
}
println(sum)
resch.push(&sum)
}
fn do_send(mut ch sync.Channel) {
for i in 0 .. 2000 {
ch.push(&i)
}
}
fn test_channel_multi_buffered() {
mut ch := sync.new_channel<int>(100)
mut resch := sync.new_channel<i64>(0)
go do_rec(mut ch, mut resch)
go do_rec(mut ch, mut resch)
go do_rec(mut ch, mut resch)
go do_rec(mut ch, mut resch)
go do_send(mut ch)
go do_send(mut ch)
go do_send(mut ch)
go do_send(mut ch)
mut sum := i64(0)
for _ in 0 .. 4 {
mut r := i64(0)
resch.pop(&r)
sum += r
}
assert sum == i64(4) * 2000 * (2000 - 1) / 2
}