sysdeps/pthread/tst-join1.c

   1 /* Copyright (C) 2002-2023 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 <pthread.h>
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21
  22
  23 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
  24
  25
  26 static void *
  27 tf (void *arg)
  28 {
  29   pthread_t mh = (pthread_t) arg;
  30   void *result;
  31
  32   if (pthread_mutex_unlock (&lock) != 0)
  33     {
  34       puts ("unlock failed");
  35       exit (1);
  36     }
  37
  38   if (pthread_join (mh, &result) != 0)
  39     {
  40       puts ("join failed");
  41       exit (1);
  42     }
  43
  44   if (result != (void *) 42l)
  45     {
  46       printf ("result wrong: expected %p, got %p\n", (void *) 42, result);
  47       exit (1);
  48     }
  49
  50   exit (0);
  51 }
  52
  53
  54 static int
  55 do_test (void)
  56 {
  57   pthread_t th;
  58
  59   if (pthread_mutex_lock (&lock) != 0)
  60     {
  61       puts ("1st lock failed");
  62       exit (1);
  63     }
  64
  65   if (pthread_create (&th, NULL, tf, (void *) pthread_self ()) != 0)
  66     {
  67       puts ("create failed");
  68       exit (1);
  69     }
  70
  71   if (pthread_mutex_lock (&lock) != 0)
  72     {
  73       puts ("2nd lock failed");
  74       exit (1);
  75     }
  76
  77   pthread_exit ((void *) 42);
  78 }
  79
  80 #define TEST_FUNCTION do_test ()
  81 #include "../test-skeleton.c"