85 lines
1.7 KiB
V
85 lines
1.7 KiB
V
/*
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* ATTENTION! Do not use this file as an example!
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* For that, please look at `channel_select_2_test.v` or `channel_select_3_test.v`
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*
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* This test case uses the implementation in `sync/channels.v` directly
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* in order to test it independently from the support in the core language
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*/
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import sync
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fn do_rec_i64(mut ch sync.Channel) {
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mut sum := i64(0)
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for _ in 0 .. 300 {
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mut a := i64(0)
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ch.pop(&a)
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sum += a
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}
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assert sum == 300 * (300 - 1) / 2
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}
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fn do_send_int(mut ch sync.Channel) {
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for i in 0 .. 300 {
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ch.push(&i)
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}
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}
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fn do_send_byte(mut ch sync.Channel) {
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for i in 0 .. 300 {
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ii := byte(i)
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ch.push(&ii)
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}
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}
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fn do_send_i64(mut ch sync.Channel) {
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for i in 0 .. 300 {
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ii := i64(i)
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ch.push(&ii)
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}
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}
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fn test_select() {
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mut chi := sync.new_channel<int>(0)
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mut chl := sync.new_channel<i64>(1)
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mut chb := sync.new_channel<byte>(10)
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mut recch := sync.new_channel<i64>(0)
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go do_rec_i64(mut recch)
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go do_send_int(mut chi)
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go do_send_byte(mut chb)
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go do_send_i64(mut chl)
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mut channels := [chi, recch, chl, chb]
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directions := [sync.Direction.pop, .push, .pop, .pop]
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mut sum := i64(0)
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mut rl := i64(0)
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mut ri := int(0)
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mut rb := byte(0)
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mut sl := i64(0)
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mut objs := [voidptr(&ri), &sl, &rl, &rb]
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for _ in 0 .. 1200 {
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idx := sync.channel_select(mut channels, directions, mut objs, -1)
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match idx {
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0 {
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sum += ri
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}
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1 {
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sl++
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}
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2 {
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sum += rl
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}
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3 {
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sum += rb
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}
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else {
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println('got $idx (timeout)')
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}
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}
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}
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// Use Gauß' formula for the first 2 contributions
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// the 3rd contribution is `byte` and must be seen modulo 256
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expected_sum := 2 * (300 * (300 - 1) / 2) +
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256 * (256 - 1) / 2 +
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44 * (44 - 1) / 2
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assert sum == expected_sum
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}
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