sync channel example

gistfile1.txt

package main

import (
	"fmt"
	"runtime"
)

func main() {
	runtime.GOMAXPROCS(runtime.NumCPU())
	synch := make(chan struct{})
	for i := 0; i < 10; i++ {
		print := func(s string) {
			fmt.Println(s)
			var ste struct{}
			synch <- ste
		}
		fmt.Println(i, ":---")
		go print("A")
		<-synch
		go print("B")
		<-synch
		go print("C")
		<-synch
	}
}