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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ### 讀寫互斥鎖 讀寫鎖分為兩種:讀鎖和寫鎖。當一個goroutine獲取讀鎖之后,其他的goroutine如果是獲取讀鎖會繼續獲得鎖,如果是獲取寫鎖就會等待;當一個goroutine獲取寫鎖之后,其他的goroutine無論是獲取讀鎖還是寫鎖都會等待; 讀寫鎖非常適合讀多寫少的場景,如果讀和寫的操作差別不大,讀寫鎖的優勢就發揮不出來 ~~~ var ( x int64 wg sync.WaitGroup lock sync.Mutex rwlock sync.RWMutex ) func write() { // lock.Lock() // 加互斥鎖 rwlock.Lock() // 加寫鎖 x = x + 1 time.Sleep(10 * time.Millisecond) // 假設讀操作耗時10毫秒 rwlock.Unlock() // 解寫鎖 // lock.Unlock() // 解互斥鎖 wg.Done() } func read() { // lock.Lock() // 加互斥鎖 rwlock.RLock() // 加讀鎖 time.Sleep(time.Millisecond) // 假設讀操作耗時1毫秒 rwlock.RUnlock() // 解讀鎖 // lock.Unlock() // 解互斥鎖 wg.Done() } func main() { start := time.Now() for i := 0; i < 10; i++ { wg.Add(1) go write() } for i := 0; i < 1000; i++ { wg.Add(1) go read() } wg.Wait() end := time.Now() fmt.Println(end.Sub(start)) } ~~~
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                              哎呀哎呀视频在线观看