python 多线程一（lock）

'''
Created on Jun 17, 2013
 
@author: smp
'''
#-*- coding:utf-8 -*-
 
import threading
import time
 
counter = 0
mutex=threading.Lock()
 
class MyThread(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
 
    def run(self):
        global counter,mutex
        time.sleep(1);
        if mutex.acquire():
            counter += 1
            print "I am %s,set counter:%s" %(self.name,counter)
            mutex.release()
 
if __name__=="__main__":
    for i in range(0,10):
        my_thread = MyThread()
        my_thread.start()

I am Thread-1,set counter:1
I am Thread-2,set counter:2
I am Thread-4,set counter:3
I am Thread-3,set counter:4
I am Thread-5,set counter:5
I am Thread-6,set counter:6
I am Thread-7,set counter:7
I am Thread-9,set counter:8
I am Thread-10,set counter:9
I am Thread-8,set counter:10