htl/tests/test-17.c

   1 /* Test that the key reuse inside libpthread does not cause thread
   2    specific values to persist.
   3    Copyright (C) 2000-2022 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library;  if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #define _GNU_SOURCE 1
  21
  22 #include <pthread.h>
  23 #include <stdio.h>
  24 #include <assert.h>
  25 #include <errno.h>
  26
  27 void
  28 work (int iter)
  29 {
  30   error_t err;
  31   pthread_key_t key1;
  32   pthread_key_t key2;
  33   void *value1;
  34   void *value2;
  35
  36   printf ("work/%d: start\n", iter);
  37   err = pthread_key_create (&key1, NULL);
  38   assert (err == 0);
  39   err = pthread_key_create (&key2, NULL);
  40   assert (err == 0);
  41
  42   value1 = pthread_getspecific (key1);
  43   value2 = pthread_getspecific (key2);
  44   printf ("work/%d: pre-setspecific: %p,%p\n", iter, value1, value2);
  45   assert (value1 == NULL);
  46   assert (value2 == NULL);
  47   err = pthread_setspecific (key1, (void *) (0x100 + iter));
  48   assert (err == 0);
  49   err = pthread_setspecific (key2, (void *) (0x200 + iter));
  50   assert (err == 0);
  51
  52   value1 = pthread_getspecific (key1);
  53   value2 = pthread_getspecific (key2);
  54   printf ("work/%d: post-setspecific: %p,%p\n", iter, value1, value2);
  55   assert (value1 == (void *) (0x100 + iter));
  56   assert (value2 == (void *) (0x200 + iter));
  57
  58   err = pthread_key_delete (key1);
  59   assert (err == 0);
  60   err = pthread_key_delete (key2);
  61   assert (err == 0);
  62 }
  63
  64 int
  65 main (int argc, char *argv[])
  66 {
  67   int i;
  68
  69   for (i = 0; i < 8; ++i)
  70     work (i + 1);
  71
  72   return 0;
  73 }