forked from Imagelibrary/rtems
89 lines
3.0 KiB
C
89 lines
3.0 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/**
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* @file
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*
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* @ingroup POSIXAPI
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*
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* @brief Gets Scheduling Policy and Parameters of Individual Threads
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*/
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/*
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* 13.5.2 Dynamic Thread Scheduling Parameters Access,
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* P1003.1c/Draft 10, p. 124
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*
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* COPYRIGHT (c) 1989-2014.
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* On-Line Applications Research Corporation (OAR).
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <pthread.h>
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#include <errno.h>
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#include <rtems/posix/pthreadimpl.h>
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#include <rtems/posix/pthreadattrimpl.h>
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#include <rtems/posix/priorityimpl.h>
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#include <rtems/score/schedulerimpl.h>
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#include <rtems/score/threadimpl.h>
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int pthread_getschedparam(
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pthread_t thread,
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int *policy,
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struct sched_param *param
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)
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{
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Thread_Control *the_thread;
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Thread_queue_Context queue_context;
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const Thread_CPU_budget_operations *cpu_budget_operations;
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const Scheduler_Control *scheduler;
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Priority_Control priority;
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if ( policy == NULL || param == NULL ) {
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return EINVAL;
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}
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_Thread_queue_Context_initialize( &queue_context );
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the_thread = _Thread_Get( thread, &queue_context.Lock_context.Lock_context );
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if ( the_thread == NULL ) {
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return ESRCH;
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}
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_Thread_Wait_acquire_critical( the_thread, &queue_context );
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scheduler = _Thread_Scheduler_get_home( the_thread );
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_POSIX_Threads_Get_sched_param_sporadic( the_thread, scheduler, param );
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priority = the_thread->Real_priority.priority;
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cpu_budget_operations = the_thread->CPU_budget.operations;
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_Thread_Wait_release( the_thread, &queue_context );
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param->sched_priority = _POSIX_Priority_From_core( scheduler, priority );
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*policy = _POSIX_Thread_Translate_to_sched_policy( cpu_budget_operations );
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return 0;
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}
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