import threading, Queue, signal

class Task(object):
    def __init__(self):
        self.queue = Queue.Queue(0)

    def __worker(self):
        while True:
            item = self.queue.get()
            self.process(item)
            self.queue.task_done()

    def __start(self):
        thread = threading.Thread(target=self.__worker)
        thread.setDaemon(True)
        thread.start()

    def activate(self, threads):
        for thread in xrange(threads):
            self.__start()
        signal.signal(signal.SIGINT, signal.SIG_DFL)

    def put(self, item):
        self.queue.put(item)

    def wait(self):
        self.queue.join()

    def process(self, item):
        pass

class task(Task):
    def __init__(self, func):
        Task.__init__(self)
        self.process = func