Doubt regarding Thread_Control_struct in rtems

Sebastian Huber sebastian.huber at
Fri Jul 17 05:46:12 UTC 2015

On 17/07/15 03:39, Cyrille Artho wrote:
> Note that the lock only protects against direct accesses to the thread
> priority. If other code relies on the fact that the change is still
> current further down, then we may have an "atomicity race" (as it's
> sometimes called) or causality problem (another name for this).
> We are currently trying out ways to avoid any such issues, without
> using too many locks.

Please review the _Thread_Change_priority() function and 
Thread_Lock_control carefully. You may have a look at 
_Thread_queue_Enqueue_critical() and search for _Thread_Lock_set() for 

Sebastian Huber, embedded brains GmbH

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