scheduler.py

gnuradio软件无线电源程序.现在的手机多基于软件无线电

#
# 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., 59 Temple Place - Suite 330,
# Boston, MA 02111-1307, USA.
# 

from gnuradio.gr.exceptions import *
from gnuradio_swig_python import single_threaded_scheduler, sts_pyrun
import 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 ()
        for (sts, thread) in self.state:
            thread.join ()

    def wait (self):
        for (sts, thread) in self.state:
            thread.join ()