Hi,
While porting a project from Solaris to FreeBSD 4.2, I found out that the
existing FreeBSD implementation of POSIX mutexes doesn't support sharing
mutexes between processes.
In order to get around this, I eventually did my own implementation of
mutexes that works within the uthread framework and supports the
PTHREAD_PROCESS_SHARED attribute.
I can see that there are a lot of changes coming down the road in -current
that could potentially affect this area. However, I don't have a good feel
for how far it is to a future including kernel-based synchronization
objects being available to user processes.
If there is interest out there, and if it makes sense architecturally, I
could do the work necessary to integrate my changes into the uthread code
and submit it. Would that be of enough value/interest to be worth doing?
Thanks,
Jeff
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