/* Copyright (C) 2006-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.

   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 <pthread.h>

#include <sched.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <sys/syscall.h>

/* This test is Linux specific.  */

#define CHECK_TPP_PRIORITY(normal, boosted) \

  do								\

    {								\

      pid_t tid = syscall (__NR_gettid);			\

								\

      struct sched_param cep_sp;				\

      int cep_policy;						\

      if (pthread_getschedparam (pthread_self (), &cep_policy,	\

				 &cep_sp) != 0)			\

	{							\

	  puts ("getschedparam failed");			\

	  ret = 1;						\

	}							\

      else if (cep_sp.sched_priority != (normal))		\

	{							\

	  printf ("unexpected priority %d != %d\n",		\

		  cep_sp.sched_priority, (normal));		\

	}							\

      if (syscall (__NR_sched_getparam, tid, &cep_sp) == 0	\

	  && cep_sp.sched_priority != (boosted))		\

	{							\

	  printf ("unexpected boosted priority %d != %d\n",	\

		  cep_sp.sched_priority, (boosted));		\

	  ret = 1;						\

	}							\

    }								\

  while (0)

int fifo_min, fifo_max;

void

init_tpp_test (void)

{

  fifo_min = sched_get_priority_min (SCHED_FIFO);

  if (fifo_min < 0)

    {

      printf ("couldn't get min priority for SCHED_FIFO: %m\n");

      exit (1);

    }

  fifo_max = sched_get_priority_max (SCHED_FIFO);

  if (fifo_max < 0)

    {

      printf ("couldn't get max priority for SCHED_FIFO: %m\n");

      exit (1);

    }

  if (fifo_min > 4 || fifo_max < 10)

    {

      printf ("%d..%d SCHED_FIFO priority interval not suitable for this test\n",

	      fifo_min, fifo_max);

      exit (0);

    }

  struct sched_param sp;

  memset (&sp, 0, sizeof (sp));

  sp.sched_priority = 4;

  int e = pthread_setschedparam (pthread_self (), SCHED_FIFO, &sp);

  if (e != 0)

    {

      errno = e;

      printf ("cannot set scheduling params: %m\n");

      exit (0);

    }

}