shared memory

socket9001 · 02-05-2004, 03:43 AM

i have two processes that i need to communicate through a shared memory segment, how can one of the processes know when the other wrote data into the segment and the other way around ?

anther IPC question, is there a way to know how many processes are listening to a message queue ?

UltimaGuy · 02-05-2004, 04:39 AM

http://www.advancedlinuxprogramming.com

infamous41md · 02-05-2004, 10:11 AM

have them signal each other with sysV semaphores.

kalleanka · 02-05-2004, 12:13 PM

Thanks for the tip ultimaguy.

socket9001 · 02-06-2004, 02:08 PM

i didnt relly get how am i suppose to use semaphores to signal the processes...
can you explain in more detail ?
or maybe refer me to an example... ?

thanks in advance