posix/src/pthreadsetaffinitynp.c

0001 /* SPDX-License-Identifier: BSD-2-Clause */
0002
0003 /**
0004  * @file
0005  *
0006  * @ingroup POSIXAPI
0007  *
0008  * @brief Pthread Set Affinity
0009  */
0010
0011 /*
0012  *  COPYRIGHT (c) 2014.
0013  *  On-Line Applications Research Corporation (OAR).
0014  *
0015  * Redistribution and use in source and binary forms, with or without
0016  * modification, are permitted provided that the following conditions
0017  * are met:
0018  * 1. Redistributions of source code must retain the above copyright
0019  *    notice, this list of conditions and the following disclaimer.
0020  * 2. Redistributions in binary form must reproduce the above copyright
0021  *    notice, this list of conditions and the following disclaimer in the
0022  *    documentation and/or other materials provided with the distribution.
0023  *
0024  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
0025  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
0026  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
0027  * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
0028  * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
0029  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
0030  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
0031  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
0032  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
0033  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
0034  * POSSIBILITY OF SUCH DAMAGE.
0035  */
0036
0037 #define  _GNU_SOURCE
0038
0039 #ifdef HAVE_CONFIG_H
0040 #include "config.h"
0041 #endif
0042
0043 #if HAVE_DECL_PTHREAD_SETAFFINITY_NP
0044
0045 #include <pthread.h>
0046 #include <errno.h>
0047
0048 #include <rtems/score/threadimpl.h>
0049 #include <rtems/score/schedulerimpl.h>
0050 #include <rtems/posix/posixapi.h>
0051
0052 int pthread_setaffinity_np(
0053   pthread_t        thread,
0054   size_t           cpusetsize,
0055   const cpu_set_t *cpuset
0056 )
0057 {
0058   Thread_Control   *the_thread;
0059   ISR_lock_Context  lock_context;
0060   Per_CPU_Control  *cpu_self;
0061   Status_Control    status;
0062
0063   if ( cpuset == NULL ) {
0064     return EFAULT;
0065   }
0066
0067   the_thread = _Thread_Get( thread, &lock_context );
0068
0069   if ( the_thread == NULL ) {
0070     return ESRCH;
0071   }
0072
0073   cpu_self = _Thread_Dispatch_disable_critical( &lock_context );
0074   _Thread_State_acquire_critical( the_thread, &lock_context );
0075
0076   status = _Scheduler_Set_affinity(
0077     the_thread,
0078     cpusetsize,
0079     cpuset
0080   );
0081
0082   _Thread_State_release( the_thread, &lock_context );
0083   _Thread_Dispatch_enable( cpu_self );
0084   return _POSIX_Get_error( status );
0085 }
0086 #endif