方法执行超时机制实现

package main
import (
    "fmt"
    "time"
)
var timeoutchan chan bool
func init () {
    timeoutchan = make(chan bool ,1)
}
func main() {
    f13_1()
    // 通过睡眠模拟超时
    time.Sleep(time.Second * 3)
    f13_2()
    time.Sleep(time.Second * 5)
}
func f13_1(){
    go func () {
        for {
            <- time.After(time.Second*2)
            select {
            case <- timeoutchan:
                fmt.Println("success...")
                return
            default:
                fmt.Println("timeout...")
                // TODO 做超时处理逻辑
                return
            }
        }
    }()
}
func f13_2() {
    timeoutchan <- true
}