/usr/lib/python2.7/dist-packages/air_modes/zmq_socket.py is in gr-air-modes 0.0.0.e47992d-5ubuntu3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 | # Copyright 2013 Nick Foster
#
# This file is part of gr-air-modes
#
# gr-air-modes is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3, or (at your option)
# any later version.
#
# gr-air-modes is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with gr-air-modes; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#this serves as a bridge between ZMQ subscriber and the GR pubsub callbacks interface
#creates a thread, publishes socket data to pubsub subscribers
#just a convenient way to create an aggregating socket with callbacks on receive
#can use this for inproc:// signalling with minimal overhead
#not sure if it's a good idea to use this yet
import time
import threading
import zmq
from gnuradio.gr.pubsub import pubsub
import Queue
class zmq_pubsub_iface(threading.Thread):
def __init__(self, context, subaddr=None, pubaddr=None):
threading.Thread.__init__(self)
#private data
self._queue = Queue.Queue()
self._subsocket = context.socket(zmq.SUB)
self._pubsocket = context.socket(zmq.PUB)
self._subaddr = subaddr
self._pubaddr = pubaddr
if type(self._subaddr) is str:
self._subaddr = [self._subaddr]
if type(self._pubaddr) is str:
self._pubaddr = [self._pubaddr]
self._sub_connected = False
self._pubsub = pubsub()
if self._pubaddr is not None:
for addr in self._pubaddr:
self._pubsocket.bind(addr)
self._poller = zmq.Poller()
self._poller.register(self._subsocket, zmq.POLLIN)
#public data
self.shutdown = threading.Event()
self.finished = threading.Event()
#init
self.setDaemon(True)
self.start()
def subscribe(self, key, subscriber):
if not self._sub_connected:
if not self._subaddr:
raise Exception("No subscriber address set")
for addr in self._subaddr:
self._subsocket.connect(addr)
self._sub_connected = True
self._subsocket.setsockopt(zmq.SUBSCRIBE, key)
self._pubsub.subscribe(key, subscriber)
def unsubscribe(self, key, subscriber):
self._subsocket.setsockopt(zmq.UNSUBSCRIBE, key)
self._pubsub.unsubscribe(key, subscriber)
#executed from the thread context(s) of the caller(s)
#so we use a queue to push sending into the run loop
#since sockets must be used in the thread they were created in
def __setitem__(self, key, val):
if not self._pubaddr:
raise Exception("No publisher address set")
if not self.shutdown.is_set():
self._queue.put([key, val])
def __getitem__(self, key):
return self._pubsub[key]
def run(self):
done = False
while not self.shutdown.is_set() and not done:
if self.shutdown.is_set():
done = True
#send
while not self._queue.empty():
self._pubsocket.send_multipart(self._queue.get())
#receive
if self._sub_connected:
socks = dict(self._poller.poll(timeout=0))
while self._subsocket in socks \
and socks[self._subsocket] == zmq.POLLIN:
[address, msg] = self._subsocket.recv_multipart()
self._pubsub[address] = msg
socks = dict(self._poller.poll(timeout=0))
#snooze
if not done:
time.sleep(0.1)
self._subsocket.close()
self._pubsocket.close()
self.finished.set()
def close(self):
self.shutdown.set()
#self._queue.join() #why does this block forever
self.finished.wait(0.2)
def pr(x):
print x
if __name__ == "__main__":
#create socket pair
context = zmq.Context(1)
sock1 = zmq_pubsub_iface(context, subaddr="inproc://sock2-pub", pubaddr="inproc://sock1-pub")
sock2 = zmq_pubsub_iface(context, subaddr="inproc://sock1-pub", pubaddr=["inproc://sock2-pub", "tcp://*:5433"])
sock3 = zmq_pubsub_iface(context, subaddr="tcp://localhost:5433", pubaddr=None)
sock1.subscribe("data1", pr)
sock2.subscribe("data2", pr)
sock3.subscribe("data3", pr)
for i in range(10):
sock1["data2"] = "HOWDY"
sock2["data3"] = "DRAW"
sock2["data1"] = "PARDNER"
time.sleep(0.1)
time.sleep(0.1)
sock1.close()
sock2.close()
sock3.close()
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