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Remove superfluous support for simple binary semaphores. With this we
can get rid of the CORE_MUTEX_NESTING_BLOCKS variant.
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Move the safety check performed by
_CORE_mutex_Check_dispatch_for_seize() out of the performance critical
path and generalize it. Blocking on a thread queue with an unexpected
thread dispatch disabled level is illegal in all system states.
Add the expected thread dispatch disable level (which may be 1 or 2
depending on the operation) to Thread_queue_Context and use it in
_Thread_queue_Enqueue_critical().
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Add _Thread_queue_Context_set_MP_callout() to simplify
_Thread_queue_Context_initialize(). This makes it possible to more
easily add additional fields to Thread_queue_Context.
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Unify the status codes of the Classic and POSIX API to use the new enum
Status_Control. This eliminates the Thread_Control::Wait::timeout_code
field and the timeout parameter of _Thread_queue_Enqueue_critical() and
_MPCI_Send_request_packet(). It gets rid of the status code translation
tables and instead uses simple bit operations to get the status for a
particular API. This enables translation of status code constants at
compile time. Add _Thread_Wait_get_status() to avoid direct access of
thread internal data structures.
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Close #2721.
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Close #2720.
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Close #2719.
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Drop the multiprocessing (MP) dependent callout parameter from the
thread queue extract, dequeue, flush and unblock methods. Merge this
parameter with the lock context into new structure Thread_queue_Context.
This helps to gets rid of the conditionally compiled method call
helpers.
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This change adds rtems_printf and related functions and wraps the
RTEMS print plugin support into a user API. All references to the
plugin are removed and replaced with the rtems_printer interface.
Printk and related functions are made to return a valid number of
characters formatted and output.
The function attribute to check printf functions has been added
to rtems_printf and printk. No changes to remove warrnings are part
of this patch set.
The testsuite has been moved over to the rtems_printer. The testsuite
has a mix of rtems_printer access and direct print control via the
tmacros.h header file. The support for begink/endk has been removed
as it served no purpose and only confused the code base. The testsuite
has not been refactored to use rtems_printf. This is future work.
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Close #2718.
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Uniformly use *_Get() to get an object by identifier with a lock
context.
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Use _Objects_Get_local() for _Semaphore_Get_interrupt_disable() to get
rid of the location parameter. Move remote object handling to semaphore
MPCI support.
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Update #2555.
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This is a preparation to remove the Giant lock.
Update #2555.
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Rename _ISR_Disable() into _ISR_Local_disable(). Rename _ISR_Enable()
into _ISR_Local_enable(). Remove _Debug_Is_owner_of_giant().
This is a preparation to remove the Giant lock.
Update #2555.
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Rename _ISR_Disable_without_giant() into _ISR_Local_disable(). Rename
_ISR_Enable_without_giant() into _ISR_Local_enable().
This is a preparation to remove the Giant lock.
Update #2555.
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Replace _Thread_Disable_dispatch() with _Thread_Dispatch_disable().
Replace _Thread_Enable_dispatch() with _Thread_Dispatch_enable().
This is a preparation to remove the Giant lock.
Update #2555.
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Replace _Thread_Get() with _Thread_Get_interrupt_disable() to avoid the
Giant lock.
Update #2555.
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Use _Semaphore_Get_interrupt_disable() instead.
Update #2555.
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Update #2555.
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Add _Thread_Change_life_locked() as a general function to alter the
thread life state. Use it to implement _Thread_Set_life_protection() as
a first step.
Update #2555.
Update #2626.
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Update #2714.
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Added only for evaluation purposes. We have to compare the performance
against the ticket lock on the interesting platforms via
smptests/smplock01.
The following GCC shortcoming affects the MCS lock:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66867
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Avoid output in signal handler to not disturb the timings which are
checked in this test. Use asserts to ensure proper signal handler
invocations.
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POSIX mandates that an error code is returned and not -1 plus errno.
Close #2715.
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Update #2714.
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POSIX recommends ESRCH in case no thread exists for the specified
identifier.
Close #2713.
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Fix overall clock tick count. Change introduced by
90d8567d34a6d80da04b1cb37b667a3173f584c4.
Update #2554.
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In addition protect scheduler of thread by thread state lock. Enables
use of scheduler per-instance locks.
Update #2555.
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The priority inheritance and ceiling CORE mutexes wrongly used the FIFO
queueing discipline. Delete misleading _CORE_mutex_Is_priority(). Bug
introduced by 1e1a91ed11458ddbb27b94d0001d8f0fc2ef7a97.
Add test sptests/spmutex01, since no existing uni-processor test covered
the thread priority queueing discipline for CORE mutexes.
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The _Objects_Information_table is statically initialized. So, we can
make it read-only.
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Update #2494.
Update #2555.
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Account for the terminating null character. Use _POSIX_PATH_MAX instead
of NAME_MAX according to _POSIX_Semaphore_Manager_initialization() and
_POSIX_Message_queue_Manager_initialization().
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Start with a copy of the Priority SMP scheduler implementation.
Update #2510.
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Remove support for strict order mutexes.
Close #2124.
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Update #2555.
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The mq_open() function returns a descriptor to a POSIX message queue
object identified by a name. This is similar to sem_open(). In
contrast to the POSIX semaphore the POSIX message queues use a separate
object for the descriptor. This extra object is superfluous, since the
object identifier can be used directly for this purpose, just like for
the semaphores.
Update #2702.
Update #2555.
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Remove unused location parameter.
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Remove unused supports_global parameter. Convert
_Objects_Initialize_information() to a macro to avoid use of
RTEMS_MULTIPROCESSING define for each caller.
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Delete _POSIX_Mutex_Get(). Use _POSIX_Mutex_Get_interrupt_disable()
instead.
Update #2555.
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Use proper CORE_semaphore_Status for _CORE_semaphore_Flush() and
_CORE_semaphore_Destroy() operations.
Close #2696.
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