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#
# Copyright 2004 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# GNU Radio 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 2, or (at your option)
# any later version.
#
# GNU Radio 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 GNU Radio; see the file COPYING. If not, write to
# the Free Software Foundation, Inc., 51 Franklin Street,
# Boston, MA 02110-1301, USA.
#
from gnuradio.gr.exceptions import *
from gnuradio_swig_python import single_threaded_scheduler, sts_pyrun
import gr_threading as _threading
#import threading as _threading
class scheduler_thread(_threading.Thread):
def __init__(self, sts):
_threading.Thread.__init__(self)
self.sts = sts
def run(self):
# Invoke the single threaded scheduler's run method
#
# Note that we're in a new thread, and that sts_pyrun
# releases the global interpreter lock. This has the
# effect of evaluating the graph in parallel to the
# main line control code.
sts_pyrun(self.sts)
self.sts = None
class scheduler(object):
def __init__(self, fg):
graphs = fg.partition_graph(fg.blocks)
# print "@@@ # graphs = %d" % (len(graphs))
self.state = []
for g in graphs:
list_of_blocks = [x.block() for x in g]
sts = single_threaded_scheduler(list_of_blocks)
thread = scheduler_thread(sts)
thread.setDaemon(1)
self.state.append((sts, thread))
def start(self):
for (sts, thread) in self.state:
thread.start()
def stop(self):
for (sts, thread) in self.state:
sts.stop()
self.wait()
def wait(self):
for (sts, thread) in self.state:
timeout = 0.100
while True:
thread.join(timeout)
if not thread.isAlive():
break
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