sysdeps/pthread/tst-join2.c

   1 /* Copyright (C) 2002-2024 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 <errno.h>
  19 #include <pthread.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <time.h>
  24
  25
  26 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
  27
  28
  29 static void *
  30 tf (void *arg)
  31 {
  32   if (pthread_mutex_lock (&lock) != 0)
  33     {
  34       puts ("child: mutex_lock failed");
  35       return NULL;
  36     }
  37
  38   return (void *) 42l;
  39 }
  40
  41
  42 static int
  43 do_test (void)
  44 {
  45   pthread_t th;
  46
  47   if (pthread_mutex_lock (&lock) != 0)
  48     {
  49       puts ("mutex_lock failed");
  50       exit (1);
  51     }
  52
  53   if (pthread_create (&th, NULL, tf, NULL) != 0)
  54     {
  55       puts ("mutex_create failed");
  56       exit (1);
  57     }
  58
  59   void *status;
  60   int val = pthread_tryjoin_np (th, &status);
  61   if (val == 0)
  62     {
  63       puts ("1st tryjoin succeeded");
  64       exit (1);
  65     }
  66   else if (val != EBUSY)
  67     {
  68       puts ("1st tryjoin didn't return EBUSY");
  69       exit (1);
  70     }
  71
  72   if (pthread_mutex_unlock (&lock) != 0)
  73     {
  74       puts ("mutex_unlock failed");
  75       exit (1);
  76     }
  77
  78   while ((val = pthread_tryjoin_np (th, &status)) != 0)
  79     {
  80       if (val != EBUSY)
  81         {
  82           printf ("tryjoin returned %s (%d), expected only 0 or EBUSY\n",
  83                   strerror (val), val);
  84           exit (1);
  85         }
  86
  87       /* Delay minimally.  */
  88       struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
  89       nanosleep (&ts, NULL);
  90     }
  91
  92   if (status != (void *) 42l)
  93     {
  94       printf ("return value %p, expected %p\n", status, (void *) 42l);
  95       exit (1);
  96     }
  97
  98   return 0;
  99 }
 100
 101 #define TEST_FUNCTION do_test ()
 102 #include "../test-skeleton.c"