1  /* Test that the key reuse inside libpthread does not cause thread
       2     specific values to persist.
       3     Copyright (C) 2000-2023 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  }