go channel for synchronization

tags: learning go programming

content

go channel could be used to block a go routine

func main() {
	ch := make(chan, bool)
	go func(ch chan bool) {
		fmt.Printf("doing someting")
		time.Sleep(time.Second)
		fmt.Printf("done")
		ch <- true
	}(ch)
	<-ch
}

in this example, main will wait for go routine to finish
more precisely, main is waiting for the channel to have something to read (main is being blocked!)
if there’s no channel in this context, main will finish before go routine can.
- no output from go routine will be seen

up

go-channel-basics go-routine-basics

down

reference

Go by Example: Channel Synchronization