6 from eventlet.support import greenlets as greenlet, six
7 from eventlet.hubs.hub import BaseHub, READ, WRITE
10 class event_wrapper(object):
12 def __init__(self, impl=None, seconds=None):
14 self.seconds = seconds
17 if self.impl is not None:
18 return repr(self.impl)
20 return object.__repr__(self)
23 if self.impl is not None:
26 return object.__str__(self)
29 if self.impl is not None:
35 return bool(self.impl and self.impl.pending())
40 SYSTEM_EXCEPTIONS = (KeyboardInterrupt, SystemExit)
43 super(Hub, self).__init__()
46 self.signal_exc_info = None
49 lambda signalnum, frame: self.greenlet.parent.throw(KeyboardInterrupt))
50 self.events_to_add = []
55 for e in self.events_to_add:
56 if e is not None and e.impl is not None and e.seconds is not None:
59 self.events_to_add = []
62 if getattr(event, '__event_exc', None) is not None:
63 # only have to do this because of bug in event.loop
64 t = getattr(event, '__event_exc')
65 setattr(event, '__event_exc', None)
66 assert getattr(event, '__event_exc') is None
67 six.reraise(t[0], t[1], t[2])
76 except greenlet.GreenletExit:
78 except self.SYSTEM_EXCEPTIONS:
81 if self.signal_exc_info is not None:
82 self.schedule_call_global(
83 0, greenlet.getcurrent().parent.throw, *self.signal_exc_info)
84 self.signal_exc_info = None
86 self.squelch_timer_exception(None, sys.exc_info())
88 def abort(self, wait=True):
89 self.schedule_call_global(0, self.greenlet.throw, greenlet.GreenletExit)
91 assert self.greenlet is not greenlet.getcurrent(), "Can't abort with wait from inside the hub's greenlet."
94 def _getrunning(self):
95 return bool(self.greenlet)
97 def _setrunning(self, value):
98 pass # exists for compatibility with BaseHub
99 running = property(_getrunning, _setrunning)
101 def add(self, evtype, fileno, real_cb, real_tb, mac):
102 # this is stupid: pyevent won't call a callback unless it's a function,
103 # so we have to force it to be one here
104 if isinstance(real_cb, types.BuiltinMethodType):
111 evt = event.read(fileno, cb, fileno)
112 elif evtype is WRITE:
113 evt = event.write(fileno, cb, fileno)
115 return super(Hub, self).add(evtype, fileno, evt, real_tb, mac)
117 def signal(self, signalnum, handler):
120 handler(signalnum, None)
122 self.signal_exc_info = sys.exc_info()
124 return event_wrapper(event.signal(signalnum, wrapper))
126 def remove(self, listener):
127 super(Hub, self).remove(listener)
130 def remove_descriptor(self, fileno):
131 for lcontainer in six.itervalues(self.listeners):
132 listener = lcontainer.pop(fileno, None)
136 except self.SYSTEM_EXCEPTIONS:
139 traceback.print_exc()
141 def schedule_call_local(self, seconds, cb, *args, **kwargs):
142 current = greenlet.getcurrent()
143 if current is self.greenlet:
144 return self.schedule_call_global(seconds, cb, *args, **kwargs)
145 event_impl = event.event(_scheduled_call_local, (cb, args, kwargs, current))
146 wrapper = event_wrapper(event_impl, seconds=seconds)
147 self.events_to_add.append(wrapper)
150 schedule_call = schedule_call_local
152 def schedule_call_global(self, seconds, cb, *args, **kwargs):
153 event_impl = event.event(_scheduled_call, (cb, args, kwargs))
154 wrapper = event_wrapper(event_impl, seconds=seconds)
155 self.events_to_add.append(wrapper)
158 def _version_info(self):
159 baseversion = event.__version__
163 def _scheduled_call(event_impl, handle, evtype, arg):
164 cb, args, kwargs = arg
171 def _scheduled_call_local(event_impl, handle, evtype, arg):
172 cb, args, kwargs, caller_greenlet = arg
174 if not caller_greenlet.dead: