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Initialize thread queue context early preferably outside the critical
section.
Remove implicit _Thread_queue_Context_initialize() from
_Thread_Wait_acquire().
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Replace Thread_Scheduler_control::control and
Thread_Scheduler_control::own_control with new
Thread_Scheduler_control::home.
Update #2556.
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Add priority nodes which contribute to the overall thread priority.
The actual priority of a thread is now an aggregation of priority nodes.
The thread priority aggregation for the home scheduler instance of a
thread consists of at least one priority node, which is normally the
real priority of the thread. The locking protocols (e.g. priority
ceiling and priority inheritance), rate-monotonic period objects and the
POSIX sporadic server add, change and remove priority nodes.
A thread changes its priority now immediately, e.g. priority changes are
not deferred until the thread releases its last resource.
Replace the _Thread_Change_priority() function with
* _Thread_Priority_perform_actions(),
* _Thread_Priority_add(),
* _Thread_Priority_remove(),
* _Thread_Priority_change(), and
* _Thread_Priority_update().
Update #2412.
Update #2556.
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Avoid direct access to thread internal data fields.
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Move POSIX API priority validation into _POSIX_Priority_To_core().
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Instead of lowering the priority in case the initial budget is consumed
raise the priority for each new period. Restore the normal priority
once the initial budget is consumed. This makes it later easier to
combine the high priority phase with temporary priority boosts (e.g. via
priority ceiling and inheritance).
Use the thread lock to protect the POSIX thread attributes instead of
the thread state lock. This makes it easier to change the thread
priority and keep the POSIX attributes consistent.
Fixes a false positive use of uninitialized variable warning.
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This field was redundant.
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Close #2734.
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