def send(self, item):
"""sends the given item to the other side of the channel,
possibly blocking if the sender queue is full.
Note that an item needs to be marshallable.
"""
if self.isclosed():
raise IOError, "cannot send to %r" % (self, )
if isinstance(item, Channel):
data = Message.CHANNEL_NEW(self.id, item.id)
else:
data = Message.CHANNEL_DATA(self.id, item)
self.gateway._send(data)
