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/* Test that pthread_create diagnoses invalid scheduling parameters.
Copyright (C) 2014-2022 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
<https://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, ¶m));
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"
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