| 1 | fn do_rec(ch chan int, resch chan i64) { |
| 2 | mut sum := i64(0) |
| 3 | for _ in 0 .. 2000 { |
| 4 | sum += <-ch |
| 5 | } |
| 6 | println(sum) |
| 7 | resch <- sum |
| 8 | } |
| 9 | |
| 10 | fn do_send(ch chan int) { |
| 11 | for i in 0 .. 2000 { |
| 12 | ch <- i |
| 13 | } |
| 14 | } |
| 15 | |
| 16 | fn test_channel_multi_unbuffered() { |
| 17 | ch := chan int{} |
| 18 | resch := chan i64{} |
| 19 | spawn do_rec(ch, resch) |
| 20 | spawn do_rec(ch, resch) |
| 21 | spawn do_rec(ch, resch) |
| 22 | spawn do_rec(ch, resch) |
| 23 | spawn do_send(ch) |
| 24 | spawn do_send(ch) |
| 25 | spawn do_send(ch) |
| 26 | spawn do_send(ch) |
| 27 | mut sum := i64(0) |
| 28 | for _ in 0 .. 4 { |
| 29 | sum += <-resch |
| 30 | } |
| 31 | assert sum == i64(4) * 2000 * (2000 - 1) / 2 |
| 32 | } |
| 33 |