python多线程threading.Lock锁用法实例

本文实例讲述了python多线程threading.Lock锁的用法实例,分享给大家供大家参考。具体分析如下:

python的锁可以独立提取出来

mutex = threading.Lock()

#锁的使用

#创建锁

mutex = threading.Lock()

#锁定

mutex.acquire([timeout])

#释放

mutex.release()

锁定方法acquire可以有一个超时时间的可选参数timeout。如果设定了timeout,则在超时后通过返回值可以判断是否得到了锁,从而可以进行一些其他的处理。

#!/usr/bin/env python

#coding=utf-8

import threading

import time

 

class MyThread(threading.Thread):

    def run(self):

        global num

        time.sleep(1)

 

        if mutex.acquire(1): 

            num = num+1

            msg = self.name+' set num to '+str(num)

            print msg

            mutex.release()

num = 0

mutex = threading.Lock()

def test():

    for i in range(5):

        t = MyThread()

        t.start()

if __name__ == '__main__':

    test()

Thread-1 set num to 1

Thread-3 set num to 2

Thread-4 set num to 3

Thread-5 set num to 4

Thread-2 set num to 5

 

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