nptl/tst-tsd4.c

   1 /* Copyright (C) 2003-2024 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <limits.h>
  19 #include <pthread.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <unistd.h>
  23
  24
  25 static pthread_key_t key;
  26
  27
  28 static int rounds;
  29
  30
  31 static void
  32 destr (void *arg)
  33 {
  34   ++rounds;
  35
  36   /* Use an arbitrary but valid pointer to avoid GCC warnings.  */
  37   if (pthread_setspecific (key, (void *) &rounds) != 0)
  38     {
  39       puts ("destr: setspecific failed");
  40       exit (1);
  41     }
  42 }
  43
  44
  45 static void *
  46 tf (void *arg)
  47 {
  48   /* Use an arbitrary but valid pointer to avoid GCC warnings.  */
  49   if (pthread_setspecific (key, (void *) &rounds) != 0)
  50     {
  51       puts ("tf: setspecific failed");
  52       exit (1);
  53     }
  54
  55   return NULL;
  56 }
  57
  58
  59 /* This test check non-standard behavior.  The standard does not
  60    require that the implementation has to stop calling TSD destructors
  61    when they are set over and over again.  But NPTL does.  */
  62 static int
  63 do_test (void)
  64 {
  65   /* Allocate two keys, both with destructors.  */
  66   if (pthread_key_create (&key, destr) != 0)
  67     {
  68       puts ("key_create failed");
  69       return 1;
  70     }
  71
  72   pthread_t th;
  73   if (pthread_create (&th, NULL, tf, NULL) != 0)
  74     {
  75       puts ("create failed");
  76       return 1;
  77     }
  78
  79   if (pthread_join (th, NULL) != 0)
  80     {
  81       puts ("join failed");
  82       return 1;
  83     }
  84
  85   if (rounds < PTHREAD_DESTRUCTOR_ITERATIONS)
  86     {
  87       printf ("rounds == %d, PTHREAD_DESTRUCTOR_ITERATIONS = %d\n",
  88               rounds, PTHREAD_DESTRUCTOR_ITERATIONS);
  89       return 1;
  90     }
  91
  92   if (pthread_getspecific (key) != NULL)
  93     {
  94       puts ("key data != NULL");
  95       return 1;
  96     }
  97
  98   return 0;
  99 }
 100
 101
 102 #define TEST_FUNCTION do_test ()
 103 #include "../test-skeleton.c"