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/* Copyright (C) 2006-2021 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 <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);
}
}
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