淘先锋技术网

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# 代码

# coding=utf-8

"""通过使用互斥锁,锁定全局变量,防止数据异常"""

import threading

num = 0

# 创建互斥锁

lock = threading.Lock()

def testOne():

global num

for i in range(100000):

# 在num加1前进行资源抢占,如果抢到则锁定资源,在num+1完成之后进行资源释放

lock.acquire() # 上锁

num += 1

lock.release()# 释放锁

print("testOne 执行完毕,num的值为:",num)

def testTwo():

global num

for i in range(100000):

lock.acquire()

num += 1

lock.release()

print("testTwo 执行完毕,num的值为:",num)

if __name__ == '__main__':

# 创建线程

t1 = threading.Thread(target=testOne)

t2 = threading.Thread(target=testTwo)

# 启动线程

t1.start()

t1.join()

t2.start()

t2.join()