nptl/tst-join2.c

   1 /* Copyright (C) 2002 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <pthread.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <string.h>
  25 #include <time.h>
  26
  27
  28 static pthread_mutex_t lock = PTHREAD_MUTEX_INITIALIZER;
  29
  30
  31 static void *
  32 tf (void *arg)
  33 {
  34   if (pthread_mutex_lock (&lock) != 0)
  35     {
  36       puts ("child: mutex_lock failed");
  37       return NULL;
  38     }
  39
  40   return (void *) 42l;
  41 }
  42
  43
  44 static int
  45 do_test (void)
  46 {
  47   pthread_t th;
  48
  49   if (pthread_mutex_lock (&lock) != 0)
  50     {
  51       puts ("mutex_lock failed");
  52       exit (1);
  53     }
  54
  55   if (pthread_create (&th, NULL, tf, NULL) != 0)
  56     {
  57       puts ("mutex_create failed");
  58       exit (1);
  59     }
  60
  61   void *status;
  62   int val = pthread_tryjoin_np (th, &status);
  63   if (val == 0)
  64     {
  65       puts ("1st tryjoin succeeded");
  66       exit (1);
  67     }
  68   else if (val != EBUSY)
  69     {
  70       puts ("1st tryjoin didn't return EBUSY");
  71       exit (1);
  72     }
  73
  74   if (pthread_mutex_unlock (&lock) != 0)
  75     {
  76       puts ("mutex_unlock failed");
  77       exit (1);
  78     }
  79
  80   while ((val = pthread_tryjoin_np (th, &status)) != 0)
  81     {
  82       if (val != EBUSY)
  83         {
  84           printf ("tryjoin returned %s (%d), expected only 0 or EBUSY\n",
  85                   strerror (val), val);
  86           exit (1);
  87         }
  88
  89       /* Delay minimally.  */
  90       struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
  91       nanosleep (&ts, NULL);
  92     }
  93
  94   if (status != (void *) 42l)
  95     {
  96       printf ("return value %p, expected %p\n", status, (void *) 42l);
  97       exit (1);
  98     }
  99
 100   return 0;
 101 }
 102
 103 #define TEST_FUNCTION do_test ()
 104 #include "../test-skeleton.c"