nptl/tst-join2.c

   1 /* Copyright (C) 2002-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <pthread.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <time.h>
  25
  26
  27 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
  28
  29
  30 static void *
  31 tf (void *arg)
  32 {
  33   if (pthread_mutex_lock (&lock) != 0)
  34     {
  35       puts ("child: mutex_lock failed");
  36       return NULL;
  37     }
  38
  39   return (void *) 42l;
  40 }
  41
  42
  43 static int
  44 do_test (void)
  45 {
  46   pthread_t th;
  47
  48   if (pthread_mutex_lock (&lock) != 0)
  49     {
  50       puts ("mutex_lock failed");
  51       exit (1);
  52     }
  53
  54   if (pthread_create (&th, NULL, tf, NULL) != 0)
  55     {
  56       puts ("mutex_create failed");
  57       exit (1);
  58     }
  59
  60   void *status;
  61   int val = pthread_tryjoin_np (th, &status);
  62   if (val == 0)
  63     {
  64       puts ("1st tryjoin succeeded");
  65       exit (1);
  66     }
  67   else if (val != EBUSY)
  68     {
  69       puts ("1st tryjoin didn't return EBUSY");
  70       exit (1);
  71     }
  72
  73   if (pthread_mutex_unlock (&lock) != 0)
  74     {
  75       puts ("mutex_unlock failed");
  76       exit (1);
  77     }
  78
  79   while ((val = pthread_tryjoin_np (th, &status)) != 0)
  80     {
  81       if (val != EBUSY)
  82         {
  83           printf ("tryjoin returned %s (%d), expected only 0 or EBUSY\n",
  84                   strerror (val), val);
  85           exit (1);
  86         }
  87
  88       /* Delay minimally.  */
  89       struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
  90       nanosleep (&ts, NULL);
  91     }
  92
  93   if (status != (void *) 42l)
  94     {
  95       printf ("return value %p, expected %p\n", status, (void *) 42l);
  96       exit (1);
  97     }
  98
  99   return 0;
 100 }
 101
 102 #define TEST_FUNCTION do_test ()
 103 #include "../test-skeleton.c"