往前走，一片诱人的新绿尽收眼底，那是满池的新荷。荷叶有的平展着圆盘浮在水面上；有的绿伞般在空中摇曳；有的兜着水珠把阳光反射得灿烂夺目；有的长得非常高，却未展开叶面，勇敢地挺立着。荷花则多半含苞待放，白中透粉的一朵朵花儿，活像一个个花仙子借着微风，在池中裙袂飞扬，翩然起舞。
原理：建立一个任务队列，然多个线程都从这个任务队列中取出任务然后执行，当然任务队列要加锁，详细请看代码
import threading
import time
import signal
import os
class task_info(object):
def __init__(self):
self.func = None
self.parm0 = None
self.parm1 = None
self.parm2 = None
class task_list(object):
def __init__(self):
self.tl = []
self.mutex = threading.Lock()
self.sem = threading.Semaphore(0)
def append(self, ti):
self.mutex.acquire()
self.tl.append(ti)
self.mutex.release()
self.sem.release()
def fetch(self):
self.sem.acquire()
self.mutex.acquire()
ti = self.tl.pop(0)
self.mutex.release()
return ti
class thrd(threading.Thread):
def __init__(self, tl):
threading.Thread.__init__(self)
self.tl = tl
def run(self):
while True:
tsk = self.tl.fetch()
tsk.func(tsk.parm0, tsk.parm1, tsk.parm2)
class thrd_pool(object):
def __init__(self, thd_count, tl):
self.thds = []
for i in range(thd_count):
self.thds.append(thrd(tl))
def run(self):
for thd in self.thds:
thd.start()
def func(parm0=None, parm1=None, parm2=None):
print 'count:%s, thrd_name:%s'%(str(parm0), threading.currentThread().getName())
def cleanup(signo, stkframe):
print ('Oops! Got signal %s', signo)
os._exit(0)
if __name__ == '__main__':
signal.signal(signal.SIGINT, cleanup)
signal.signal(signal.SIGQUIT, cleanup)
signal.signal(signal.SIGTERM, cleanup)
tl = task_list()
tp = thrd_pool(6, tl)
tp.run()
count = 0
while True:
ti = task_info()
ti.parm0 = count
ti.func = func
tl.append(ti)
count += 1
time.sleep(2)
pass
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