sh.py 文件源码

def poll(self, timeout):
            if timeout is not None:
                # convert from seconds to milliseconds
                timeout *= 1000
            changes = self._poll.poll(timeout)
            results = []
            for fd, events in changes:
                f = self._get_file_object(fd)
                if events & (select.POLLIN | select.POLLPRI):
                    results.append((f, POLLER_EVENT_READ))
                elif events & (select.POLLOUT):
                    results.append((f, POLLER_EVENT_WRITE))
                elif events & (select.POLLHUP):
                    results.append((f, POLLER_EVENT_HUP))
                elif events & (select.POLLERR | select.POLLNVAL):
                    results.append((f, POLLER_EVENT_ERROR))
            return results