Created
February 17, 2018 17:28
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go-routines created by laidback - https://repl.it/@laidback/go-routines
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| package main | |
| import "os" | |
| import "fmt" | |
| import "time" | |
| import "runtime/debug" | |
| import "runtime/pprof" | |
| var _ = os.Stdout | |
| var _ = debug.PrintStack | |
| var _ = pprof.Lookup | |
| func ping(pings chan<- string, pongs <-chan string) { | |
| dbg := 0 | |
| for played := 0; played < 5; played++ { | |
| switch <- pongs { | |
| case "start": | |
| fmt.Println("start ping ...") | |
| pings <- "ping" | |
| default: | |
| if dbg == 0 { debug.PrintStack(); dbg++ } | |
| fmt.Println("ponged") | |
| pings <- "ping" | |
| } | |
| } | |
| fmt.Println("exiting ping") | |
| } | |
| func pong(pongs chan<- string, pings <-chan string) { | |
| dbg := 0 | |
| for played := 0; played < 5; played++ { | |
| switch <- pings { | |
| case "start": | |
| fmt.Println("start pong ...") | |
| pongs <- "pong" | |
| default: | |
| if dbg == 0 { debug.PrintStack(); dbg++ } | |
| fmt.Println("pinged") | |
| pongs <- "pong" | |
| } | |
| } | |
| fmt.Println("exiting pong") | |
| } | |
| func main() { | |
| pings := make(chan string) | |
| pongs := make(chan string) | |
| go ping(pings, pongs) | |
| go pong(pongs, pings) | |
| pongs <- "start" | |
| //debug.PrintStack() | |
| pprof.Lookup("goroutine").WriteTo(os.Stdout, 1) | |
| seconds := 3 | |
| time.Sleep(time.Duration(seconds) * time.Second) | |
| fmt.Println("Hello World") | |
| // wait for user | |
| // var input string | |
| // fmt.Scanln(&input) | |
| } |
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