线程_同步应用

'''
创建mutex = threading.Lock( )
锁定mutex.acquire([blocking])
释放mutex.release( )
创建->锁定->释放
'''
from threading import Thread,Lock
from time import sleep
class Task1(Thread):
    def run(self):
        while True:
            if lock1.acquire():
                #对lock1锁定
                print("------Task 1 -----")
                sleep(0.5)
                lock2.release()
#                 释放lock2锁的绑定
# 锁1上锁，锁2解锁
class Task2(Thread):
    def run(self):
        while True:
            if lock2.acquire():
                print("------Task 2 -----")
                sleep(0.5)
                lock3.release()
# 锁2上锁，锁3解锁
class Task3(Thread):
    def run(self):
        while True:
            if lock3.acquire():
                print("------Task 3 -----")
                sleep(0.5)
                lock1.release()
#使用Lock创建出的锁默认没有“锁上”
lock1 = Lock()
#创建另外的锁，并且上锁
lock2 = Lock()
lock2.acquire()
lock3 = Lock()
lock3.acquire()
t1 = Task1()
t2 = Task2()
t3 = Task3()
t1.start()
t2.start()
t3.start()

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2020-05-08