selectors.py 文件源码

def unregister(self, fileobj):
            key = super(KqueueSelector, self).unregister(fileobj)
            if key.events & EVENT_READ:
                kev = select.kevent(key.fd, select.KQ_FILTER_READ,
                                    select.KQ_EV_DELETE)
                try:
                    self._kqueue.control([kev], 0, 0)
                except OSError:
                    # This can happen if the FD was closed since it
                    # was registered.
                    pass
            if key.events & EVENT_WRITE:
                kev = select.kevent(key.fd, select.KQ_FILTER_WRITE,
                                    select.KQ_EV_DELETE)
                try:
                    self._kqueue.control([kev], 0, 0)
                except OSError:
                    # See comment above.
                    pass
            return key