I find before handle IPC, we always call handshake_receiver function.

A basic question is why do we need to handshake receiver? What do we 

do when we handshake_receiver?

Another thing I note is we have separate handshake_receiver (remote_handshake_receiver) 

if the receiver is on the other core.

What is the difference between those two handshake_receiver functions?

Thank you very much.

Best,

Yuixn