thread_=threading.Thread(target=foreverLoop)
thread_.setDaemon(True)
thread_.start()
#主线程wait住了,不能接受信号了
#thread_.join()
def _exitCheckfunc():
print "ok"
try:
while 1:
alive=False
if thread_.isAlive():
alive=True
if not alive:
break
time.sleep(1)
#为了使得统计时间能够运行，要捕捉 KeyboardInterrupt :ctrl-c
except KeyboardInterrupt, e:
traceback.print_exc()
print "consume time :",time.time()-start
threading._shutdown=_exitCheckfunc
缺点：轮询总会浪费点cpu资源，以及battery.
有更好的解决方案敬请提出。
ps1: 进程监控解决方案 ：
用另外一个进程来接受信号后杀掉执行任务进程，牛
# -*- coding: utf-8 -*-
import time,signal,traceback,os
import sys
import threading
start=time.time()
def foreverLoop():
start=time.time()
while 1:
time.sleep(1)
print time.time()
if time.time()-start>5:
break
class Watcher:
"""this class solves two problems with multithreaded
programs in Python, (1) a signal might be delivered
to any thread (which is just a malfeature) and (2) if
the thread that gets the signal is waiting, the signal
is ignored (which is a bug).
The watcher is a concurrent process (not thread) that
waits for a signal and the process that contains the
threads. See Appendix A of The Little Book of Semaphores.
http://greenteapress.com/semaphores/
