nptl/tst-rwlock7.c

   1 /* Copyright (C) 2002-2017 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <pthread.h>
  21 #include <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <sys/time.h>
  25
  26
  27 static int kind[] =
  28   {
  29     PTHREAD_RWLOCK_PREFER_READER_NP,
  30     PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,
  31     PTHREAD_RWLOCK_PREFER_WRITER_NP,
  32   };
  33
  34
  35 static void *
  36 tf (void *arg)
  37 {
  38   pthread_rwlock_t *r = arg;
  39
  40   /* Timeout: 0.3 secs.  */
  41   struct timeval tv;
  42   (void) gettimeofday (&tv, NULL);
  43
  44   struct timespec ts;
  45   TIMEVAL_TO_TIMESPEC (&tv, &ts);
  46   ts.tv_nsec += 300000000;
  47   if (ts.tv_nsec >= 1000000000)
  48     {
  49       ts.tv_nsec -= 1000000000;
  50       ++ts.tv_sec;
  51     }
  52
  53   int err = pthread_rwlock_timedwrlock (r, &ts);
  54   if (err == 0)
  55     {
  56       puts ("rwlock_timedwrlock returned");
  57       pthread_exit ((void *) 1l);
  58     }
  59
  60   if (err != ETIMEDOUT)
  61     {
  62       printf ("err = %s (%d), expected %s (%d)\n",
  63               strerror (err), err, strerror (ETIMEDOUT), ETIMEDOUT);
  64       pthread_exit ((void *) 1l);
  65     }
  66   puts ("child: timedwrlock failed with ETIMEDOUT");
  67
  68   struct timeval tv2;
  69   (void) gettimeofday (&tv2, NULL);
  70
  71   timersub (&tv2, &tv, &tv);
  72
  73   if (tv.tv_usec < 200000)
  74     {
  75       puts ("timeout too short");
  76       pthread_exit ((void *) 1l);
  77     }
  78
  79   (void) gettimeofday (&tv, NULL);
  80   TIMEVAL_TO_TIMESPEC (&tv, &ts);
  81   ts.tv_sec += 10;
  82   /* Note that the following operation makes ts invalid.  */
  83   ts.tv_nsec += 1000000000;
  84
  85   err = pthread_rwlock_timedwrlock (r, &ts);
  86   if (err == 0)
  87     {
  88       puts ("2nd timedwrlock succeeded");
  89       pthread_exit ((void *) 1l);
  90     }
  91   if (err != EINVAL)
  92     {
  93       puts ("2nd timedwrlock did not return EINVAL");
  94       pthread_exit ((void *) 1l);
  95     }
  96   puts ("child: timedwrlock failed with EINVAL");
  97
  98   return NULL;
  99 }
 100
 101
 102 static int
 103 do_test (void)
 104 {
 105   size_t cnt;
 106   for (cnt = 0; cnt < sizeof (kind) / sizeof (kind[0]); ++cnt)
 107     {
 108       pthread_rwlock_t r;
 109       pthread_rwlockattr_t a;
 110
 111       if (pthread_rwlockattr_init (&a) != 0)
 112         {
 113           printf ("round %Zu: rwlockattr_t failed\n", cnt);
 114           exit (1);
 115         }
 116
 117       if (pthread_rwlockattr_setkind_np (&a, kind[cnt]) != 0)
 118         {
 119           printf ("round %Zu: rwlockattr_setkind failed\n", cnt);
 120           exit (1);
 121         }
 122
 123       if (pthread_rwlock_init (&r, &a) != 0)
 124         {
 125           printf ("round %Zu: rwlock_init failed\n", cnt);
 126           exit (1);
 127         }
 128
 129       if (pthread_rwlockattr_destroy (&a) != 0)
 130         {
 131           printf ("round %Zu: rwlockattr_destroy failed\n", cnt);
 132           exit (1);
 133         }
 134
 135       struct timeval tv;
 136       (void) gettimeofday (&tv, NULL);
 137
 138       struct timespec ts;
 139       TIMEVAL_TO_TIMESPEC (&tv, &ts);
 140
 141       ++ts.tv_sec;
 142
 143       /* Get a read lock.  */
 144       if (pthread_rwlock_timedrdlock (&r, &ts) != 0)
 145         {
 146           printf ("round %Zu: rwlock_timedrdlock failed\n", cnt);
 147           exit (1);
 148         }
 149       printf ("%zu: got timedrdlock\n", cnt);
 150
 151       pthread_t th;
 152       if (pthread_create (&th, NULL, tf, &r) != 0)
 153         {
 154           printf ("round %Zu: create failed\n", cnt);
 155           exit (1);
 156         }
 157
 158       void *status;
 159       if (pthread_join (th, &status) != 0)
 160         {
 161           printf ("round %Zu: join failed\n", cnt);
 162           exit (1);
 163         }
 164       if (status != NULL)
 165         {
 166           printf ("failure in round %Zu\n", cnt);
 167           exit (1);
 168         }
 169
 170       if (pthread_rwlock_destroy (&r) != 0)
 171         {
 172           printf ("round %Zu: rwlock_destroy failed\n", cnt);
 173           exit (1);
 174         }
 175     }
 176
 177   return 0;
 178 }
 179
 180 #define TEST_FUNCTION do_test ()
 181 #include "../test-skeleton.c"