python多线程同步机制condition

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import threading
import time



def customer(cond):
 t = threading.currentThread()
with cond:
# wait()方法创建了一个名为waiter的锁，并且设置锁的状态为locked。这个waiter锁用于线程间的通讯
 cond.wait()
print '{}: Resource is available to consumer'.format(t.name)

def producer(cond):
 t = threading.currentThread()
with cond:
print '{}: Making resource available'.format(t.name)
 cond.notifyAll()


if __name__ == "__main__":
 cond = threading.Condition()
 c1 = threading.Thread(target=customer, args=(cond,), name='c1')
 c2 = threading.Thread(target=customer, args=(cond,), name='c2')
 p1 = threading.Thread(target=producer, args=(cond,), name='p1')

 c1.start()
 c2.start()
 p1.start()


print 'Main end'