"window lock broken"

[Tom Perrine x426]

Environment: SW: SunOS 3.5/3.5.1	HW: Sun-3/260C

We are getting occasional "window lock broken because process XXX blocked"
messages. This only happens when we are doing menu things (menu selection)
in process XXX.

I am fairly sure that we are seeing this because we are running a
home-brew pseudo-real-time scheduler on top of the regular scheduler.  (I
inherited it.)

My question is: Where is this message documented? I can't find it
anywhere. I think that it means that some process wanted to write into a
locked region but found that some other process which held a lock on that
region was in the "blocked" state, and broke the lock.

If this is the case, we may be able to hack the real-time scheduler to
notice when window things are happening.

I am an OS person, but not (yet) a window person, so any pointers would be
greatly appreciated.

Tom Perrine
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