def __init__(self, name):
self.name = name
self.listeners = WeakMethodContainer()
if AIO_AVAILABLE:
self.aio_listeners = AioWeakMethodContainer()
self.aio_waiters = AioEventWaiters()
self.emission_lock = EmissionHoldLock(self)
class Event(object):
"""Holds references to event names and subscribed listeners
This is used internally by :class:`Dispatcher`.
"""
__slots__ = ('name', 'listeners', 'aio_waiters', 'aio_listeners', 'emission_lock')
def __init__(self, name):
self.name = name
self.listeners = WeakMethodContainer()
if AIO_AVAILABLE:
self.aio_listeners = AioWeakMethodContainer()
self.aio_waiters = AioEventWaiters()
self.emission_lock = EmissionHoldLock(self)
def add_listener(self, callback, **kwargs):
if AIO_AVAILABLE:
if iscoroutinefunction(callback):
loop = kwargs.get('__aio_loop__')
if loop is None:
raise RuntimeError('Coroutine function given without event loop')
self.aio_listeners.add_method(loop, callback)
return
self.listeners.add_method(callback)
def remove_listener(self, obj):
if isinstance(obj, (types.MethodType, types.FunctionType)):
self.listeners.del_method(obj)
if AIO_AVAILABLE:
self.aio_listeners.del_method(obj)
else:
self.listeners.del_instance(obj)
if AIO_AVAILABLE:
self.aio_listeners.del_instance(obj)
def __call__(self, *args, **kwargs):
"""Dispatches the event to listeners
Called by :meth:`~Dispatcher.emit`
"""
if self.emission_lock.held:
self.emission_lock.last_event = (args, kwargs)
return
if AIO_AVAILABLE:
self.aio_waiters(*args, **kwargs)
self.aio_listeners(*args, **kwargs)
for m in self.listeners.iter_methods():
r = m(*args, **kwargs)
if r is False:
return r
if AIO_AVAILABLE:
def __await__(self):
return self.aio_waiters.__await__()
def __repr__(self):
return '<{}: {}>'.format(self.__class__, self)
def __str__(self):
return self.name