nptl/tst-tls1.c

   1 /* Copyright (C) 2003 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   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
  24
  25 #if HAVE___THREAD
  26 struct test_s
  27 {
  28   int a;
  29   int b;
  30 };
  31
  32 #define INIT_A 1
  33 #define INIT_B 42
  34 /* Deliberately not static.  */
  35 __thread struct test_s s __attribute__ ((tls_model ("initial-exec"))) =
  36 {
  37   .a = INIT_A,
  38   .b = INIT_B
  39 };
  40
  41
  42 static void *
  43 tf (void *arg)
  44 {
  45   if (s.a != INIT_A || s.b != INIT_B)
  46     {
  47       puts ("initial value of s in child thread wrong");
  48       exit (1);
  49     }
  50
  51   ++s.a;
  52
  53   return NULL;
  54 }
  55 #endif
  56
  57
  58 int
  59 do_test (void)
  60 {
  61 #if !HAVE___THREAD
  62
  63   puts ("No __thread support in compiler, test skipped.");
  64
  65   return 0;
  66 #else
  67
  68   if (s.a != INIT_A || s.b != INIT_B)
  69     {
  70       puts ("initial value of s in main thread wrong");
  71       exit (1);
  72     }
  73
  74 #define N 10
  75   int i;
  76   for (i = 0; i < N; ++i)
  77     {
  78 #define M 10
  79       pthread_t th[M];
  80       int j;
  81       for (j = 0; j < M; ++j, ++s.a)
  82         if (pthread_create (&th[j], NULL, tf, NULL) != 0)
  83           {
  84             puts ("pthread_create failed");
  85             exit (1);
  86           }
  87
  88       for (j = 0; j < M; ++j)
  89         if (pthread_join (th[j], NULL) != 0)
  90           {
  91             puts ("pthread_join failed");
  92             exit (1);
  93           }
  94     }
  95
  96   return 0;
  97 #endif
  98 }
  99
 100
 101 #define TEST_FUNCTION do_test ()
 102 #include "../test-skeleton.c"