go手动添加锁=安全

package main

import (
    "fmt"
    "sync"
    "time"
)

// 为了解决线程不安全，我们自己加锁

type  concurentMat struct {
    mp map[int]int
    sync.RWMutex
}

// 通过set方法做原有map的赋值
func (c *concurentMat)Set(key, v int)  {
    // 添加写锁
    c.Lock()
    c.mp[key] = v
    c.Unlock()

}
// 通过get方法做原有map的读取值
func (c *concurentMat)Get(key int) int{
    c.RLock()
    r := c.mp[key]
    c.RUnlock()
    return r
}

func main(){

    c := concurentMat{
        mp: make(map[int]int),

    }
    // 并发一个线程循环写

    go func() {
        for i:= 0; i< 1000; i++ {
            c.Set(i, i)
        }
    }()


    go func() {
        for i:= 0; i< 1000; i++ {
            ret := c.Get(i)
            fmt.Println(i, ret)
        }
    }()
    time.Sleep(1 * time.Second)


}