def __init__(self, msg_count=10, interval=1.0, payload=""):
'''Message source constructor.
@param msg_count: the number of messages to emit.
@param interval: the lapse of time between messages, in seconds.
@param payload: a string to include in message.
'''
gwnblock_py.__init__(self,
name='msg_source',
number_in=0,
number_out=1,
number_timers=1,
number_timeouts=0)
## initialize timers, start
self.timers[0].retry = msg_count
self.timers[0].interval = interval
#self.timers[0].exit_flag = False
#self.timers[0].interrupt = False
self.timers[0].msg_dc_1['Final'] = 'False'
self.timers[0].msg_dc_2['Final'] = 'True'
self.timers[0].msg_dc_1['payload'] = payload
self.timers[0].msg_dc_2['payload'] = payload
self.start_timers()
return
def __init__(self):
'''Message sink constructor.
'''
gwnblock_py.__init__(self,
name='msg_sink',
number_in=1,
number_out=0,
number_timers=0,
number_timeouts=0)
return
def __init__(self, tout_stop=5.0, tout_restart=8.0):
'''Message passer constructor.
@param tout_stop: a timeout to stop resending, in seconds.
@param tout_restart_ a timeout to restart resending, in seconds.
'''
gwnblock_py.__init__(self,
name='msg_passer',
number_in=1,
number_out=1,
number_timers=0,
number_timeouts=2)
## initialize timeouts, start
self.timeouts[0].timeout = tout_stop
self.timeouts[0].start()
self.timeouts[1].timeout = tout_restart
self.timeouts[1].start()
self.transmit = True # if True passes message to next block
return