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                            ## RWMutex
* 同一時間段內  有多個 goroutine  獲取到讀鎖
* 同一時間段內 只有一個 goroutine 獲取到寫鎖
* 同一時間段內 只能存在讀鎖或者寫鎖 （讀寫鎖互斥）
~~~
var lock sync.RWMutex

lock.RLock
lock.Runlock

lock.Lock()
lock.Unlock()
~~~
讀鎖代碼
![](https://img.kancloud.cn/7b/2d/7b2d5233362c79ff22bd423f93b0758b_782x412.png)

寫鎖代碼
![](https://img.kancloud.cn/14/ea/14ea3a4f7ba2332e3504f3e50e405f87_784x343.png)

運行結果
（同時/并發獲取讀鎖 然后釋放 ）（獲取寫鎖 釋放寫鎖 獲取寫鎖 釋放寫鎖 ... ...）(讀寫鎖沒有同時執行 代表互斥)
![](https://img.kancloud.cn/95/38/95381649bbb81deb261812e91432010b_619x336.png)
![](https://img.kancloud.cn/3e/9b/3e9b11eb1636829835d28048caea400f_629x364.png)
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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