uclibc-ng/libpthread/nptl/pthread_attr_setschedparam.c

/* Copyright (C) 2002, 2004, 2009 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

#include <assert.h>
#include <errno.h>
#include <string.h>
#include "pthreadP.h"


int
__pthread_attr_setschedparam (
     pthread_attr_t *attr,
     const struct sched_param *param)
{
  assert (sizeof (*attr) >= sizeof (struct pthread_attr));
  struct pthread_attr *iattr = (struct pthread_attr *) attr;

  int min = sched_get_priority_min (iattr->schedpolicy);
  int max = sched_get_priority_max (iattr->schedpolicy);
  if (min == -1 || max == -1
      || param->sched_priority > max || param->sched_priority < min)
    return EINVAL;

  /* Copy the new values.  */
  memcpy (&iattr->schedparam, param, sizeof (struct sched_param));

  /* Remember we set the value.  */
  iattr->flags |= ATTR_FLAG_SCHED_SET;

  return 0;
}
strong_alias (__pthread_attr_setschedparam, pthread_attr_setschedparam)