/* Test that pthread_create diagnoses invalid scheduling parameters.

   Copyright (C) 2014-2018 Free Software Foundation, Inc.

   This file is part of the GNU C Library.

   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 <assert.h>

#include <errno.h>

#include <pthread.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

static void *

thread_function (void *arg)

{

  abort ();

}

static int

do_test (void)

{

#if !defined SCHED_FIFO || !defined SCHED_OTHER

  puts ("SCHED_FIFO or SCHED_OTHER not available at compile time");

  return 0; /* 77 */

#else

  int err;

#define TRY(func, arglist)                              \

  if ((err = func arglist) != 0)                        \

    {                                                   \

      printf ("%s: %s\n", #func, strerror (err));       \

      return 2;                                         \

    }

  int fifo_max = sched_get_priority_max (SCHED_FIFO);

  if (fifo_max == -1)

    {

      assert (errno == ENOTSUP || errno == ENOSYS);

      puts ("SCHED_FIFO not supported, cannot test");

      return 0; /* 77 */

    }

  int other_max = sched_get_priority_max (SCHED_OTHER);

  if (other_max == -1)

    {

      assert (errno == ENOTSUP || errno == ENOSYS);

      puts ("SCHED_OTHER not supported, cannot test");

      return 0; /* 77 */

    }

  assert (fifo_max > other_max);

  pthread_attr_t attr;

  TRY (pthread_attr_init, (&attr));

  TRY (pthread_attr_setinheritsched, (&attr, PTHREAD_EXPLICIT_SCHED));

  TRY (pthread_attr_setschedpolicy, (&attr, SCHED_FIFO));

  /* This value is chosen so as to be valid for SCHED_FIFO but invalid for

     SCHED_OTHER.  */

  struct sched_param param = { .sched_priority = other_max + 1 };

  TRY (pthread_attr_setschedparam, (&attr, &param));

  TRY (pthread_attr_setschedpolicy, (&attr, SCHED_OTHER));

  /* Now ATTR has a sched_param that is invalid for its policy.  */

  pthread_t th;

  err = pthread_create (&th, &attr, &thread_function, NULL);

  if (err != EINVAL)

    {

      printf ("pthread_create returned %d (%s), expected %d (EINVAL: %s)\n",

              err, strerror (err), EINVAL, strerror (EINVAL));

      return 1;

    }

  return 0;

#endif

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"