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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
                在線程間共享多個資源的時候,如果兩個線程分別占有一部分資源并且同時等待對方的資源,就會造成死鎖。 ```python """ @Date 2021/4/5 """ import threading import time class MyThread1(threading.Thread): def run(self): # 對mutexA上鎖 mutexA.acquire() # mutexA上鎖后,延時1秒,等待另外那個線程 把mutexB上鎖 print(self.name + '----do1---up----') time.sleep(1) # 此時會堵塞,因為這個mutexB已經被另外的線程搶先上鎖了 mutexB.acquire() print(self.name + '----do1---down----') mutexB.release() # 對mutexA解鎖 mutexA.release() class MyThread2(threading.Thread): def run(self): # 對mutexB上鎖 mutexB.acquire() # mutexB上鎖后,延時1秒,等待另外那個線程 把mutexA上鎖 print(self.name + '----do2---up----') time.sleep(1) # 此時會堵塞,因為這個mutexA已經被另外的線程搶先上鎖了 mutexA.acquire() print(self.name + '----do2---down----') mutexA.release() # 對mutexB解鎖 mutexB.release() mutexA = threading.Lock() mutexB = threading.Lock() if __name__ == '__main__': t1 = MyThread1() t2 = MyThread2() t1.start() t2.start() """ 輸出 Thread-1----do1---up---- Thread-2----do2---up---- 后,線程被阻塞了 """ ```
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