[Discuss-gnuradio] Conditional switching between two subroutines in real-time

Hi,

In GRC, I need to switch back and forth (in real time) between two subroutines based on some conditional 'IF' statement. For example, 'after' some preset lapse of time. Is it possible to do that?  

Please note that I need the conditional switching to take place in real-time while the USRP is running, without turning the USRP off and on.

Thanks in advance.

Best regards,

Khalid