Blame nptl/tst-tpp.h

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/* Copyright (C) 2006-2018 Free Software Foundation, Inc.
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   This file is part of the GNU C Library.
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   Contributed by Jakub Jelinek <jakub@redhat.com>, 2006.
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   The GNU C Library is free software; you can redistribute it and/or
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   modify it under the terms of the GNU Lesser General Public
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   License as published by the Free Software Foundation; either
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   version 2.1 of the License, or (at your option) any later version.
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   The GNU C Library is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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   Lesser General Public License for more details.
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   You should have received a copy of the GNU Lesser General Public
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   License along with the GNU C Library; if not, see
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   <http://www.gnu.org/licenses/>.  */
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#include <errno.h>
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#include <pthread.h>
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#include <sched.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/syscall.h>
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/* This test is Linux specific.  */
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#define CHECK_TPP_PRIORITY(normal, boosted) \
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  do								\
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    {								\
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      pid_t tid = syscall (__NR_gettid);			\
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								\
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      struct sched_param cep_sp;				\
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      int cep_policy;						\
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      if (pthread_getschedparam (pthread_self (), &cep_policy,	\
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				 &cep_sp) != 0)			\
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	{							\
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	  puts ("getschedparam failed");			\
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	  ret = 1;						\
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	}							\
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      else if (cep_sp.sched_priority != (normal))		\
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	{							\
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	  printf ("unexpected priority %d != %d\n",		\
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		  cep_sp.sched_priority, (normal));		\
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	}							\
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      if (syscall (__NR_sched_getparam, tid, &cep_sp) == 0	\
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	  && cep_sp.sched_priority != (boosted))		\
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	{							\
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	  printf ("unexpected boosted priority %d != %d\n",	\
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		  cep_sp.sched_priority, (boosted));		\
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	  ret = 1;						\
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	}							\
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    }								\
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  while (0)
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int fifo_min, fifo_max;
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void
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init_tpp_test (void)
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{
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  fifo_min = sched_get_priority_min (SCHED_FIFO);
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  if (fifo_min < 0)
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    {
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      printf ("couldn't get min priority for SCHED_FIFO: %m\n");
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      exit (1);
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    }
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  fifo_max = sched_get_priority_max (SCHED_FIFO);
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  if (fifo_max < 0)
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    {
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      printf ("couldn't get max priority for SCHED_FIFO: %m\n");
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      exit (1);
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    }
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  if (fifo_min > 4 || fifo_max < 10)
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    {
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      printf ("%d..%d SCHED_FIFO priority interval not suitable for this test\n",
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	      fifo_min, fifo_max);
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      exit (0);
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    }
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  struct sched_param sp;
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  memset (&sp, 0, sizeof (sp));
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  sp.sched_priority = 4;
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  int e = pthread_setschedparam (pthread_self (), SCHED_FIFO, &sp);
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  if (e != 0)
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    {
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      errno = e;
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      printf ("cannot set scheduling params: %m\n");
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      exit (0);
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    }
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}