/* Copyright (C) 2002-2018 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, see

   <http://www.gnu.org/licenses/>.  */

#include <errno.h>

#include <string.h>

#include "pthreadP.h"

#include <lowlevellock.h>

int

__pthread_getschedparam (pthread_t threadid, int *policy,

			 struct sched_param *param)

{

  struct pthread *pd = (struct pthread *) threadid;

  /* Make sure the descriptor is valid.  */

  if (INVALID_TD_P (pd))

    /* Not a valid thread handle.  */

    return ESRCH;

  int result = 0;

  /* See CREATE THREAD NOTES in nptl/pthread_create.c.  */

  lll_lock (pd->lock, LLL_PRIVATE);

  /* The library is responsible for maintaining the values at all

     times.  If the user uses an interface other than

     pthread_setschedparam to modify the scheduler setting it is not

     the library's problem.  In case the descriptor's values have

     not yet been retrieved do it now.  */

  if ((pd->flags & ATTR_FLAG_SCHED_SET) == 0)

    {

      if (__sched_getparam (pd->tid, &pd->schedparam) != 0)

	result = 1;

      else

	pd->flags |= ATTR_FLAG_SCHED_SET;

    }

  if ((pd->flags & ATTR_FLAG_POLICY_SET) == 0)

    {

      pd->schedpolicy = __sched_getscheduler (pd->tid);

      if (pd->schedpolicy == -1)

	result = 1;

      else

	pd->flags |= ATTR_FLAG_POLICY_SET;

    }

  if (result == 0)

    {

      *policy = pd->schedpolicy;

      memcpy (param, &pd->schedparam, sizeof (struct sched_param));

    }

  lll_unlock (pd->lock, LLL_PRIVATE);

  return result;

}

strong_alias (__pthread_getschedparam, pthread_getschedparam)