32 lines
1.0 KiB
Python
32 lines
1.0 KiB
Python
import errno
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from eventlet import patcher, support
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from eventlet.hubs import hub, poll
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select = patcher.original('select')
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def is_available():
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return hasattr(select, 'epoll')
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# NOTE: we rely on the fact that the epoll flag constants
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# are identical in value to the poll constants
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class Hub(poll.Hub):
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def __init__(self, clock=None):
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super(Hub, self).__init__(clock=clock)
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self.poll = select.epoll()
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def add(self, evtype, fileno, cb, tb, mac):
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oldlisteners = bool(self.listeners[self.READ].get(fileno) or
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self.listeners[self.WRITE].get(fileno))
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# not super() to avoid double register()
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listener = hub.BaseHub.add(self, evtype, fileno, cb, tb, mac)
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try:
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self.register(fileno, new=not oldlisteners)
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except IOError as ex: # ignore EEXIST, #80
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if support.get_errno(ex) != errno.EEXIST:
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raise
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return listener
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def do_poll(self, seconds):
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return self.poll.poll(seconds)
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