通过channel退出goroutine

channel.go

package main

import (
	"fmt"
	"time"
)

func main() {
	ch1 := make(chan int, 10)
	ch2 := make(chan int, 10)
	ch3 := make(chan int, 10)
	ch4 := make(chan int, 10)

	for i := 0; i < 10; i++ {
		ch1 <- i
		ch2 <- i
	}

	go func() {
		for {
			select {
			case c1 := <-ch1:
				{
					ch3 <- c1
					fmt.Println("1111 -> 3333")
					time.Sleep(1000)
				}
			case c2 := <-ch2:
				{
					ch4 <- c2
					if c2 == 3 {
						return
					}
					fmt.Println("2222 -> 4444")
				}
			}
		}
	}()

	for {
	}

}