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#
# Copyright 2013 Free Software Foundation, Inc.
#
# This file is part of GNU Radio.
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
import time
import zmq
import numpy
class probe_manager(object):
def __init__(self):
self.zmq_context = zmq.Context()
self.poller = zmq.Poller()
self.interfaces = []
def add_socket(self, address, data_type, callback_func):
socket = self.zmq_context.socket(zmq.SUB)
socket.setsockopt(zmq.SUBSCRIBE, b"")
# Do not wait more than 5 seconds for a message
socket.setsockopt(zmq.RCVTIMEO, 100)
socket.connect(address)
# use a tuple to store interface elements
self.interfaces.append((socket, data_type, callback_func))
self.poller.register(socket, zmq.POLLIN)
# Give it time for the socket to be ready
time.sleep(0.5)
def watcher(self):
poll = dict(self.poller.poll(1000))
for i in self.interfaces:
# i = (socket, data_type, callback_func)
if poll.get(i[0]) == zmq.POLLIN:
# receive data
msg_packed = i[0].recv()
# use numpy to unpack the data
msg_unpacked = numpy.frombuffer(msg_packed, numpy.dtype(i[1]))
# invoke callback function
i[2](msg_unpacked)
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