nptl/tst-once2.c

   1 /* Copyright (C) 2002-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <pthread.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <time.h>
  23
  24
  25 #define N 100
  26
  27 static pthread_once_t once = PTHREAD_ONCE_INIT;
  28
  29 static int global;
  30
  31 static void
  32 once_handler (void)
  33 {
  34   struct timespec ts;
  35
  36   ++global;
  37
  38   ts.tv_sec = 2;
  39   ts.tv_nsec = 0;
  40   nanosleep (&ts, NULL);
  41 }
  42
  43
  44 static void *
  45 tf (void *arg)
  46 {
  47   pthread_once (&once, once_handler);
  48
  49   if (global != 1)
  50     {
  51       printf ("thread %ld: global == %d\n", (long int) arg, global);
  52       exit (1);
  53     }
  54
  55   return NULL;
  56 }
  57
  58
  59 static int
  60 do_test (void)
  61 {
  62   pthread_attr_t at;
  63   pthread_t th[N];
  64   int cnt;
  65
  66   if (pthread_attr_init (&at) != 0)
  67     {
  68       puts ("attr_init failed");
  69       return 1;
  70     }
  71
  72   if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0)
  73     {
  74       puts ("attr_setstacksize failed");
  75       return 1;
  76     }
  77
  78   for (cnt = 0; cnt < N; ++cnt)
  79     if (pthread_create (&th[cnt], &at, tf, (void *) (long int) cnt) != 0)
  80       {
  81         printf ("creation of thread %d failed\n", cnt);
  82         return 1;
  83       }
  84
  85   if (pthread_attr_destroy (&at) != 0)
  86     {
  87       puts ("attr_destroy failed");
  88       return 1;
  89     }
  90
  91   for (cnt = 0; cnt < N; ++cnt)
  92     if (pthread_join (th[cnt], NULL) != 0)
  93       {
  94         printf ("join of thread %d failed\n", cnt);
  95         return 1;
  96       }
  97
  98   return 0;
  99 }
 100
 101 #define TEST_FUNCTION do_test ()
 102 #define TIMEOUT 4
 103 #include "../test-skeleton.c"