go程控制

package main
import (
    "context"
    "fmt"
    "time"
    "runtime"
)
func test(ctx context.Context,cancelFunc func())  {
    var i int
    for {
        select {
        case <-ctx.Done():
            fmt.Println("test done....")
            return
        default:
            fmt.Printf("执行第%d次go程\n",i)
            if i == 7{
                cancelFunc()
                fmt.Println("9999999999")
                return
            }
            i++
            time.Sleep(time.Second)
        }

    }
    fmt.Println("go程执行完毕！")
}

func main() {
    ctx, cancel := context.WithCancel(context.Background())
    go test(ctx,cancel)

    go func(context.Context) {
        ticker := time.NewTicker(1 * time.Second)
        for {
            select {
            case <-ctx.Done():
                fmt.Println("done....")
                return
            case <-ticker.C:
                fmt.Println("------aaaaaaaa-------")
                time.Sleep(time.Second)
                fmt.Println("------go程结束--------------")
            }

        }
        runtime.Goexit()

    }(ctx)
    time.Sleep(20*time.Second)
    fmt.Println("-----333333333-----")
    //for{
    //  runtime.GC()
    //}
}