nptl/pthread_attr_setschedparam.c

   1 /* Copyright (C) 2002 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <assert.h>
  21 #include <errno.h>
  22 #include <string.h>
  23 #include "pthreadP.h"
  24
  25
  26 int
  27 __pthread_attr_setschedparam (attr, param)
  28      pthread_attr_t *attr;
  29      const struct sched_param *param;
  30 {
  31   struct pthread_attr *iattr;
  32   int max_prio;
  33   int min_prio;
  34
  35   assert (sizeof (*attr) >= sizeof (struct pthread_attr));
  36   iattr = (struct pthread_attr *) attr;
  37
  38   max_prio = __sched_get_priority_max (iattr->schedpolicy);
  39   min_prio = __sched_get_priority_min (iattr->schedpolicy);
  40
  41   /* Catch invalid values.  */
  42   if (param->sched_priority < min_prio || param->sched_priority > max_prio)
  43     return EINVAL;
  44
  45   /* Copy the new values.  */
  46   memcpy (&iattr->schedparam, param, sizeof (struct sched_param));
  47
  48   return 0;
  49 }
  50 strong_alias (__pthread_attr_setschedparam, pthread_attr_setschedparam)