nptl/tst-once2.c

   1 /* Copyright (C) 2002 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <pthread.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <time.h>
  24
  25
  26 #define N 100
  27
  28 static pthread_once_t once = PTHREAD_ONCE_INIT;
  29
  30 static int global;
  31
  32 static void
  33 once_handler (void)
  34 {
  35   struct timespec ts;
  36
  37   ++global;
  38
  39   ts.tv_sec = 2;
  40   ts.tv_nsec = 0;
  41   nanosleep (&ts, NULL);
  42 }
  43
  44
  45 static void *
  46 tf (void *arg)
  47 {
  48   pthread_once (&once, once_handler);
  49
  50   if (global != 1)
  51     {
  52       printf ("thread %ld: global == %d\n", (long int) arg, global);
  53       exit (1);
  54     }
  55
  56   return NULL;
  57 }
  58
  59
  60 static int
  61 do_test (void)
  62 {
  63   pthread_t th[N];
  64   int cnt;
  65
  66   for (cnt = 0; cnt < N; ++cnt)
  67     if (pthread_create (&th[cnt], NULL, tf, (void *) (long int) cnt) != 0)
  68       {
  69         printf ("creation of thread %d failed\n", cnt);
  70         return 1;
  71       }
  72
  73   for (cnt = 0; cnt < N; ++cnt)
  74     if (pthread_join (th[cnt], NULL) != 0)
  75       {
  76         printf ("join of thread %d failed\n", cnt);
  77         return 1;
  78       }
  79
  80   return 0;
  81 }
  82
  83 #define TEST_FUNCTION do_test ()
  84 #define TIMEOUT 4
  85 #include "../test-skeleton.c"