Python实现线程池代码分享

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