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                            ## Mutex
* 保證同一時間段內 有且僅有一個goroutine持有鎖，其他申請鎖的goroutine將會被阻塞直到鎖釋放

~~~
var lock sync.Mutex
lock.Lock()
lock.Unlock()
~~~
![](https://img.kancloud.cn/bd/f9/bdf98d96fb3e2becdb5fc312dd26a1dd_696x468.png)


* 下圖跑的結果是 
方法1在57s加鎖 58s解鎖
方法2 58s加鎖 59s解鎖 
（保證同一時間段內 有且僅有一個goroutine持有鎖，其他申請鎖的goroutine將會被阻塞直到鎖釋放）
![](https://img.kancloud.cn/24/c4/24c48a453c04e4f278b69d0955416c05_914x200.png)

                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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