Doubt regarding Thread_Control_struct in rtems

[Sebastian Huber]

On 16/07/15 01:49, Saurabh Gadia wrote:
> Hi,
> Is there any explicit locking to avoid data races condition on members 
> of Thread_Control_struct in rtems? As for mutex we have ticket_lock 
> over its wait_queue in SMP architecture which can serve as explicit 
> locking in mutex. For thread I feel data race condition may happen 
> while setting *thread->current_priority. *As it is updated by thread 
> while restoring its priority and while some other thread trying to 
> promote for nested_mutex behavior.

There is no data race condition, see _Thread_Change_priority() and 
Thread_Lock_control. There is a potential problem with a deadlock at 
spin lock level however, in case the application provokes a deadlock at 
object level. This needs some further investigation.

-- 
Sebastian Huber, embedded brains GmbH

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