I need to get USRP samples from Gnuradio to C++. Eric mentioned that
a fifo with usrp_rx_cfile is the best approach to do this. All the
examples that I see use file_sink. How should I use usrp_rx_cfile?
Is it just like usrp_rx_cfile(gr.sizeof_gr_comples,filename)? Then
just one more question. If I am sampling at 500kHz (d=128), I will
get 1million samples per second when I read this in C++, real first,
then complex, and so on, right?

Thank you very much.