94 lines
1.7 KiB
V
94 lines
1.7 KiB
V
import sync
|
|
import time
|
|
|
|
fn do_rec_i64(mut ch sync.Channel) {
|
|
mut sum := i64(0)
|
|
for i in 0 .. 300 {
|
|
if i == 200 {
|
|
ch.close()
|
|
}
|
|
mut a := i64(0)
|
|
if ch.pop(&a) {
|
|
sum += a
|
|
}
|
|
}
|
|
assert sum == 200 * (200 - 1) / 2
|
|
}
|
|
|
|
fn do_send_int(mut ch sync.Channel) {
|
|
for i in 0 .. 300 {
|
|
ch.push(&i)
|
|
}
|
|
ch.close()
|
|
}
|
|
|
|
fn do_send_byte(mut ch sync.Channel) {
|
|
for i in 0 .. 300 {
|
|
ii := byte(i)
|
|
ch.push(&ii)
|
|
}
|
|
ch.close()
|
|
}
|
|
|
|
fn do_send_i64(mut ch sync.Channel) {
|
|
for i in 0 .. 300 {
|
|
ii := i64(i)
|
|
ch.push(&ii)
|
|
}
|
|
ch.close()
|
|
}
|
|
|
|
fn test_select() {
|
|
mut chi := sync.new_channel<int>(0)
|
|
mut chl := sync.new_channel<i64>(1)
|
|
mut chb := sync.new_channel<byte>(10)
|
|
mut recch := sync.new_channel<i64>(0)
|
|
go do_rec_i64(mut recch)
|
|
go do_send_int(mut chi)
|
|
go do_send_byte(mut chb)
|
|
go do_send_i64(mut chl)
|
|
mut channels := [chi, recch, chl, chb]
|
|
directions := [sync.Direction.pop, .push, .pop, .pop]
|
|
mut sum := i64(0)
|
|
mut rl := i64(0)
|
|
mut ri := int(0)
|
|
mut rb := byte(0)
|
|
mut sl := i64(0)
|
|
mut objs := [voidptr(&ri), &sl, &rl, &rb]
|
|
for j in 0 .. 1101 {
|
|
idx := sync.channel_select(mut channels, directions, mut objs, time.infinite)
|
|
match idx {
|
|
0 {
|
|
sum += ri
|
|
}
|
|
1 {
|
|
sl++
|
|
}
|
|
2 {
|
|
sum += rl
|
|
}
|
|
3 {
|
|
sum += rb
|
|
}
|
|
-2 {
|
|
// channel was closed - last item
|
|
assert j == 1100
|
|
}
|
|
else {
|
|
println('got $idx (timeout)')
|
|
assert false
|
|
}
|
|
}
|
|
if j == 1100 {
|
|
// check also in other direction
|
|
assert idx == -2
|
|
}
|
|
}
|
|
// Use Gauß' formula for the first 2 contributions
|
|
// the 3rd contribution is `byte` and must be seen modulo 256
|
|
expected_sum := 2 * (300 * (300 - 1) / 2) +
|
|
256 * (256 - 1) / 2 +
|
|
44 * (44 - 1) / 2
|
|
assert sum == expected_sum
|
|
}
|