GNU Radio, One Step at a Time: Re: [Discuss-gnuradio] how to trigger dynamic reconfiguration with lock/disconnect

I did some more research on the topic to get some ideas.
Now it seems there are two possibilities to send control signals
between the blocks:

1. Use a message queue and a watcher thread like in the digital example pkt.py

2. Use a probe block like gr.probe_avg_mag_sqrd and an endless while
loop in the main that checks for a change in some bool variable in
this block