IPC Queues

[Jason Resch]

Hello everyone,

My company is implementing an application which we plan will use shared 
memory and IPC mechanisms to coordinate work.  We would prefer to use 
POSIX message queues due to their better support for priorities, but 
from the research I have done thus far it appears none of the BSDs 
support POSIX queues.  My question is, does there exist some kernel 
patch or port that implements POSIX queues for FreeBSD?

I would also be grateful for any insight others could provide regarding 
alternatives.  For instance, how well socket performance stacks up 
against shared memory, particularly in a multi-threaded enviornment.  
Thank you in advance for any assitance you can provide.

Regards,

Jason Resch