1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
|
import threading
try:
import queue
except ImportError:
import Queue as queue
class Notifier(object):
def __init__(self, bus, listeners, timeout=None):
"""Manages the distribution of **Messages** from a given bus to a
list of listeners.
:param bus: The :ref:`bus` to listen too.
:param listeners: An iterable of :class:`~can.Listeners`
:param timeout: An optional maximum number of seconds to wait for any message.
"""
self.listeners = listeners
self.bus = bus
self.timeout = timeout
self.running = threading.Event()
self.running.set()
self._reader = threading.Thread(target=self.rx_thread)
self._reader.daemon = True
self._reader.start()
def stop(self):
"""Stop notifying Listeners when new :class:`~can.Message` objects arrive
and call :meth:`~can.Listener.stop` on each Listener."""
self.running.clear()
if self.timeout is not None:
self._reader.join(self.timeout + 0.1)
def rx_thread(self):
while self.running.is_set():
msg = self.bus.recv(self.timeout)
if msg is not None:
for callback in self.listeners:
callback(msg)
for listener in self.listeners:
listener.stop()
|
