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/* SPDX-License-Identifier: BSD-2-Clause */
/**
* @file
*
* @ingroup RTEMSScoreScheduler
*
* @brief This source file contains the implementation of
* _Scheduler_Set_affinity().
*/
/*
* Copyright (C) 2014, 2017 embedded brains GmbH & Co. KG
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <rtems/score/schedulerimpl.h>
Status_Control _Scheduler_Set_affinity(
Thread_Control *the_thread,
size_t cpusetsize,
const cpu_set_t *cpuset
)
{
Processor_mask affinity;
Processor_mask_Copy_status copy_status;
const Scheduler_Control *scheduler;
Scheduler_Node *node;
ISR_lock_Context lock_context;
Status_Control status;
copy_status = _Processor_mask_From_cpu_set_t( &affinity, cpusetsize, cpuset );
if ( !_Processor_mask_Is_at_most_partial_loss( copy_status ) ) {
return STATUS_INVALID_NUMBER;
}
/*
* Reduce affinity set to the online processors to be in line with
* _Thread_Initialize() which sets the default affinity to the set of online
* processors.
*/
_Processor_mask_And( &affinity, _SMP_Get_online_processors(), &affinity );
scheduler = _Thread_Scheduler_get_home( the_thread );
_Scheduler_Acquire_critical( scheduler, &lock_context );
node = _Thread_Scheduler_get_home_node( the_thread );
#if defined(RTEMS_SMP)
status = ( *scheduler->Operations.set_affinity )(
scheduler,
the_thread,
node,
&affinity
);
if ( status == STATUS_SUCCESSFUL ) {
_Processor_mask_Assign( &the_thread->Scheduler.Affinity, &affinity );
}
#else
status = _Scheduler_default_Set_affinity_body(
scheduler,
the_thread,
node,
&affinity
);
#endif
_Scheduler_Release_critical( scheduler, &lock_context );
return status;
}
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