1  /* Separate thread test for pthread_getaffinity_np, pthread_setaffinity_np.
       2     Copyright (C) 2015-2023 Free Software Foundation, Inc.
       3     This file is part of the GNU C Library.
       4  
       5     The GNU C Library is free software; you can redistribute it and/or
       6     modify it under the terms of the GNU Lesser General Public
       7     License as published by the Free Software Foundation; either
       8     version 2.1 of the License, or (at your option) any later version.
       9  
      10     The GNU C Library is distributed in the hope that it will be useful,
      11     but WITHOUT ANY WARRANTY; without even the implied warranty of
      12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      13     Lesser General Public License for more details.
      14  
      15     You should have received a copy of the GNU Lesser General Public
      16     License along with the GNU C Library; if not, see
      17     <https://www.gnu.org/licenses/>.  */
      18  
      19  #include <errno.h>
      20  #include <pthread.h>
      21  #include <stdbool.h>
      22  #include <stdio.h>
      23  #include <stdlib.h>
      24  
      25  /* Defined for the benefit of tst-skeleton-thread-affinity.c, included
      26     below.  This variant runs the functions on a separate thread.  */
      27  
      28  struct affinity_access_task
      29  {
      30    pthread_t thread;
      31    cpu_set_t *set;
      32    size_t size;
      33    bool get;
      34    int result;
      35  };
      36  
      37  static void *
      38  affinity_access_thread (void *closure)
      39  {
      40    struct affinity_access_task *task = closure;
      41    if (task->get)
      42      task->result = pthread_getaffinity_np
      43        (task->thread, task->size, task->set);
      44    else
      45      task->result = pthread_setaffinity_np
      46        (task->thread, task->size, task->set);
      47    return NULL;
      48  }
      49  
      50  static int
      51  run_affinity_access_thread (cpu_set_t *set, size_t size, bool get)
      52  {
      53    struct affinity_access_task task =
      54      {
      55        .thread = pthread_self (),
      56        .set = set,
      57        .size = size,
      58        .get = get
      59      };
      60    pthread_t thr;
      61    int ret = pthread_create (&thr, NULL, affinity_access_thread, &task);
      62    if (ret != 0)
      63      {
      64        errno = ret;
      65        printf ("error: could not create affinity access thread: %m\n");
      66        abort ();
      67      }
      68    ret = pthread_join (thr, NULL);
      69    if (ret != 0)
      70      {
      71        errno = ret;
      72        printf ("error: could not join affinity access thread: %m\n");
      73        abort ();
      74      }
      75    if (task.result != 0)
      76      {
      77        errno = task.result;
      78        return -1;
      79      }
      80    return 0;
      81  }
      82  
      83  static int
      84  setaffinity (size_t size, const cpu_set_t *set)
      85  {
      86    return run_affinity_access_thread ((cpu_set_t *) set, size, false);
      87  }
      88  
      89  static int
      90  getaffinity (size_t size, cpu_set_t *set)
      91  {
      92    return run_affinity_access_thread (set, size, true);
      93  }
      94  
      95  #include "tst-skeleton-thread-affinity.c"