this post to ask you the way to notify clients of my resource manager when interrupts occur.
After carefully reading the doc, I have written a resource manager for a digital I/O PCI board.
I have to handle select() calls from client processes, to inform them of level changes on I/O ports.
I have 4 ports, PC0 to PC3, each triggering an interrupt when changing level (0 to 1 or the opposite). This means 8 possible level changes.
So I would like the clients to be able to ask and to be notified when one or more of these 8 conditions occur.
Do I have to use out of band messages? How?
Thanks you very much in advance!
Best regards from Belgium,