Python多线程编程（五）：死锁的形成

'''
Created on 2012-9-8
 
@author: walfred
@module: thread.TreadTest5
'''  
import threading 
 
counterA = 0 
counterB = 0 
 
mutexA = threading.Lock() 
mutexB = threading.Lock() 
 
class MyThread(threading.Thread): 
    def __init__(self): 
        threading.Thread.__init__(self) 
 
    def run(self): 
        self.fun1() 
        self.fun2() 
 
    def fun1(self): 
        global mutexA, mutexB 
        if mutexA.acquire(): 
            print "I am %s , get res: %s" %(self.name, "ResA") 
 
            if mutexB.acquire(): 
                print "I am %s , get res: %s" %(self.name, "ResB") 
                mutexB.release() 
 
        mutexA.release()  
 
    def fun2(self): 
        global mutexA, mutexB 
        if mutexB.acquire(): 
            print "I am %s , get res: %s" %(self.name, "ResB") 
 
            if mutexA.acquire(): 
                print "I am %s , get res: %s" %(self.name, "ResA") 
                mutexA.release() 
 
        mutexB.release()  
 
if __name__ == "__main__": 
    for i in range(0, 100): 
        my_thread = MyThread() 
        my_thread.start()

I am Thread-1 , get res: ResA
I am Thread-1 , get res: ResB
I am Thread-2 , get res: ResAI am Thread-1 , get res: ResB