go同步互斥锁

import "sync"

var (

    myMap = make(map[int]int, 10)

    lock sync.Mutex

    //声明一个全局的互斥锁

    //sync 包 同步

    // Mutex：是互斥

)

func test(n int){

    res := 1

    for i:=1;i<=n;i++{

        res *=1

    }

    lock.Lock()

    myMap[n] = res //concurrent map write

    lock.Unlock()

}

func main(){

    for i :=1;i<200;i++{

        go test(i)

    }

}

来自为知笔记(Wiz)