Prototyping child monitor thread.  Maybe only interim checkin due to repeatedly losing code during debugging, i.e. machine lockup and reboot.
Again interim commit of thread testing
Finally a working model.  Now adding back in other features and verifying stability.
More restoration and the addition of the wakeup thread
Refinement of the wakeup thread prototype
Adjustments to wakeup.  This is post loss of code again due to editor problems when realtime mulitprocess/multithread locks out the system.
Interim update to head off data loss.  Work on validating priorities
Added priority_test.cpp for validating the behaviours of competing processes.
Virtually fully developed test of priority behavior
Highlt likely 'good' test is complete for validating priority
Interim 'recovery' (read written twice due to loss recurrent) of priority test, specifically to validate wakeup thread.
Apparent fully successful validation test in priority_test.cpp of coordinator and controller processes with timer signal handler and wakeup blocking detector.