gtkreactor.py 文件源码

def doIteration(self, delay):
        # flush some pending events, return if there was something to do
        # don't use the usual "while gtk.events_pending(): mainiteration()"
        # idiom because lots of IO (in particular test_tcp's
        # ProperlyCloseFilesTestCase) can keep us from ever exiting.
        log.msg(channel='system', event='iteration', reactor=self)
        if gtk.events_pending():
            gtk.mainiteration(0)
            return
        # nothing to do, must delay
        if delay == 0:
            return # shouldn't delay, so just return
        self.doIterationTimer = gtk.timeout_add(int(delay * 1000),
                                                self.doIterationTimeout)
        # This will either wake up from IO or from a timeout.
        gtk.mainiteration(1) # block
        # note: with the .simulate timer below, delays > 0.1 will always be
        # woken up by the .simulate timer
        if self.doIterationTimer:
            # if woken by IO, need to cancel the timer
            gtk.timeout_remove(self.doIterationTimer)
            self.doIterationTimer = None