37 lines
1.2 KiB
Python
37 lines
1.2 KiB
Python
try:
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# shoot for epoll module first
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from epoll import poll as epoll
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except ImportError, e:
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# if we can't import that, hope we're on 2.6
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from select import epoll
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import time
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from eventlet.hubs.hub import BaseHub
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from eventlet.hubs import poll
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from eventlet.hubs.poll import READ, WRITE
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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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WAIT_MULTIPLIER = 1.0 # epoll.poll's timeout is measured in seconds
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def __init__(self, clock=time.time):
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BaseHub.__init__(self, clock)
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self.poll = epoll()
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try:
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# modify is required by select.epoll
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self.modify = self.poll.modify
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except AttributeError:
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self.modify = self.poll.register
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def add(self, evtype, fileno, cb):
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oldlisteners = bool(self.listeners[READ].get(fileno) or
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self.listeners[WRITE].get(fileno))
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listener = BaseHub.add(self,evtype, fileno, cb)
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if not oldlisteners:
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# Means we've added a new listener
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self.register(fileno, new=True)
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else:
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self.register(fileno, new=False)
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return listener
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