Idle -> master ...

Hi guys,

        Sorry to bounce in and out again; but I merged your adaptations of the
Idle API pieces to master last night, and added a few bits on top that
we badly need just now to stabilize profiling =) That will be in 4.4.
However, not got a lot more time to invest here this week.

        Of course - there is a lot more API work needed and then we need to
hook up your nice new priority based system there.

        Also - in reading that code, I can't help noticing it is an abomination
in so many ways =)

        As well as adding priorities - I think we need to do this:

        * unify Timer and ImplTimerData state ...
                + we should prolly move all the 'protected' state
                  data except for the Impl pointer into ImplTimerData
                + and prolly call that member pImpl for good measure

        * ImplTimerData / linked list
                + this is an abomination =)
                + certainly there are re-enterancy hazards here and
                  having the Impl lifecycle de-coupled via the
                  'mbDeleted' thing makes some sense but ...
                + manual linked list manipulation is a horror.
                + it'd be good to re-work that to use a std::list or
                  somesuch.

        * ImplTimerData / linked list
                + it seems crazy to me not to have that list sorted
                  by deadline and/or priority - so to find work we
                  can just pop it off the queue; is it ? 

        Of course, it'd be great to have these all as separate easy-to-review /
re-factor commits.

        Otherwise - really looking forward to having the API pushed across the
code; then proper priorities and all the other good bits from your work
in there.

        Hope that helps,

                Michael.

-- 
 michael.meeks@collabora.com  <><, Pseudo Engineer, itinerant idiot