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glibc/nptl/tst-tpp.h
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/* Copyright (C) 2006-2016 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); | |
} | |
} |