第十八节 多线程共享全局变量和锁机制

import threading

value = 0
glock = threading.Lock()

def value_add():
    global value
    glock.acquire()#加锁
    for x in range(1000000):
        value += 1
    glock.release()#解锁
    print('value:%s'%value)

def main():
    for x in range(2):
        t = threading.Thread(target = value_add)
        t.start()
        
if __name__ == '__main__':
    main()