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From: jsiek_at_[hidden]
Date: 2000-08-26 09:25:19

John Maddock writes:
> Jeremy,
> Just a couple more nits on the feature diagram....
> Under "Owner priority" the options Priority Ceiling and Priority
> Inheritance are not mutually exclusive - pthread mutexes will only enable
> one or the other (as far as I can tell), but you can simulate the effect of
> both with two mutexes. To put it another way, its logically possible to
> have both, but the particular mutex type that we're using as a prototype
> (pthread_mutex_t) doesn't support it.

Ok, so we should add a ceiling-and-inherited feature?

owner-priority (unaffected | ceiling | inherited | ceiling-and-inherited )

> There is one more feature, which is normally taken for granted: the
> priority of a blocked thread. Normally this thread will be suspended by
> the kernal, but there are some cases (think user mode spin locks) were this
> does not occur. Whether you want to consider this under priority inversion
> or separately I'll leave up to you...

This should probably be separate.

blocked-priority ( suspended | unaffected | reduced )



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