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Diffstat (limited to 'pym/_emerge/AbstractPollTask.py')
-rw-r--r-- | pym/_emerge/AbstractPollTask.py | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/pym/_emerge/AbstractPollTask.py b/pym/_emerge/AbstractPollTask.py new file mode 100644 index 000000000..4262b0b34 --- /dev/null +++ b/pym/_emerge/AbstractPollTask.py @@ -0,0 +1,24 @@ +from _emerge.AsynchronousTask import AsynchronousTask +from _emerge.PollConstants import PollConstants +class AbstractPollTask(AsynchronousTask): + + __slots__ = ("scheduler",) + \ + ("_registered",) + + _bufsize = 4096 + _exceptional_events = PollConstants.POLLERR | PollConstants.POLLNVAL + _registered_events = PollConstants.POLLIN | PollConstants.POLLHUP | \ + _exceptional_events + + def _unregister(self): + raise NotImplementedError(self) + + def _unregister_if_appropriate(self, event): + if self._registered: + if event & self._exceptional_events: + self._unregister() + self.cancel() + elif event & PollConstants.POLLHUP: + self._unregister() + self.wait() + |