sysdeps/pthread/tst-pt-sysconf.c

   1 /* Copyright (C) 2002-2022 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <pthread.h>
  19 #include <stdio.h>
  20 #include <unistd.h>
  21
  22
  23 static int
  24 do_test (void)
  25 {
  26   puts ("We expect no limits");
  27   /* We have no fixed limit on the number of threads.  Make sure the
  28      headers tell the right story.  */
  29 #ifdef PTHREAD_THREADS_MAX
  30   printf ("Header report maximum number of threads = %lu\n",
  31           (unsigned long int) PTHREAD_THREADS_MAX);
  32   return 1;
  33 #else
  34   long int r = sysconf (_SC_THREAD_THREADS_MAX);
  35   if (r != -1)
  36     {
  37       printf ("sysconf(_SC_THREAD_THREADS_MAX) return %ld\n", r);
  38       return 1;
  39     }
  40 #endif
  41
  42   return 0;
  43 }
  44
  45 #define TEST_FUNCTION do_test ()
  46 #include "../test-skeleton.c"