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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