Linux IPC implement signal and slot for new messange

Hi, I'm new in IPC.
I would like to implement a signal of a new message, which calls the slot function, eg .:

Code:

---

msg_on_newMessange(type, &slotFunction);

---

My code:
Header file: Attachment 13799
Parent file: Attachment 13800
Child file: Attachment 13801

How can I do this ?

You need to state your requirements clearly. We can't read your mind so please be as descriptive as possible of what you are trying to solve.

I know how to read, write messages in message queue. But I would like to implement function that is called when new messange was added to messange queue ( callback ).