python_并发编程——多线程2

import time
from threading import Thread,Lock

def func1(lock):
    global n
    lock.acquire()  #加锁
    temp = n
    time.sleep(0.2)
    n = temp -1
    lock.release()  #解锁

n = 10
t_list = []
lock = Lock()
for i in range(10):
    t1 = Thread(target=func1,args=(lock,))
    t1.start()
    t_list.append(t1)
for i in t_list:
    i.join()
print(n)

from threading import Thread,RLock

def func1(name):
    lock1.acquire()
    print(‘{}拿到第一把钥匙！‘.format(name))
    lock2.acquire()
    print(‘{}拿到第二把钥匙！‘.format(name))
    print(‘{}进入了房间‘.format(name))
    lock2.release() #归还第二把钥匙
    lock1.release() #归还第一把钥匙

lock1 = RLock()   #锁1
lock2 = RLock()   #锁2

for i in range(10):
    Thread(target=func1,args=(i,)).start()