nptl/tst-rwlock6.c

   1 /* Copyright (C) 2002-2018 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   puts ("child calling timedrdlock");
  54
  55   int err = pthread_rwlock_timedrdlock (r, &ts);
  56   if (err == 0)
  57     {
  58       puts ("rwlock_timedrdlock returned");
  59       pthread_exit ((void *) 1l);
  60     }
  61
  62   if (err != ETIMEDOUT)
  63     {
  64       printf ("err = %s (%d), expected %s (%d)\n",
  65               strerror (err), err, strerror (ETIMEDOUT), ETIMEDOUT);
  66       pthread_exit ((void *) 1l);
  67     }
  68
  69   puts ("1st child timedrdlock done");
  70
  71   struct timeval tv2;
  72   (void) gettimeofday (&tv2, NULL);
  73
  74   timersub (&tv2, &tv, &tv);
  75
  76   if (tv.tv_usec < 200000)
  77     {
  78       puts ("timeout too short");
  79       pthread_exit ((void *) 1l);
  80     }
  81
  82   (void) gettimeofday (&tv, NULL);
  83   TIMEVAL_TO_TIMESPEC (&tv, &ts);
  84   ts.tv_sec += 10;
  85   /* Note that the following operation makes ts invalid.  */
  86   ts.tv_nsec += 1000000000;
  87
  88   err = pthread_rwlock_timedrdlock (r, &ts);
  89   if (err == 0)
  90     {
  91       puts ("2nd timedrdlock succeeded");
  92       pthread_exit ((void *) 1l);
  93     }
  94   if (err != EINVAL)
  95     {
  96       puts ("2nd timedrdlock did not return EINVAL");
  97       pthread_exit ((void *) 1l);
  98     }
  99
 100   puts ("2nd child timedrdlock done");
 101
 102   return NULL;
 103 }
 104
 105
 106 static int
 107 do_test (void)
 108 {
 109   size_t cnt;
 110   for (cnt = 0; cnt < sizeof (kind) / sizeof (kind[0]); ++cnt)
 111     {
 112       pthread_rwlock_t r;
 113       pthread_rwlockattr_t a;
 114
 115       if (pthread_rwlockattr_init (&a) != 0)
 116         {
 117           printf ("round %Zu: rwlockattr_t failed\n", cnt);
 118           exit (1);
 119         }
 120
 121       if (pthread_rwlockattr_setkind_np (&a, kind[cnt]) != 0)
 122         {
 123           printf ("round %Zu: rwlockattr_setkind failed\n", cnt);
 124           exit (1);
 125         }
 126
 127       if (pthread_rwlock_init (&r, &a) != 0)
 128         {
 129           printf ("round %Zu: rwlock_init failed\n", cnt);
 130           exit (1);
 131         }
 132
 133       if (pthread_rwlockattr_destroy (&a) != 0)
 134         {
 135           printf ("round %Zu: rwlockattr_destroy failed\n", cnt);
 136           exit (1);
 137         }
 138
 139       struct timeval tv;
 140       (void) gettimeofday (&tv, NULL);
 141
 142       struct timespec ts;
 143       TIMEVAL_TO_TIMESPEC (&tv, &ts);
 144
 145       ++ts.tv_sec;
 146
 147       /* Get a write lock.  */
 148       int e = pthread_rwlock_timedwrlock (&r, &ts);
 149       if (e != 0)
 150         {
 151           printf ("round %Zu: rwlock_timedwrlock failed (%d)\n", cnt, e);
 152           exit (1);
 153         }
 154
 155       puts ("1st timedwrlock done");
 156
 157       (void) gettimeofday (&tv, NULL);
 158       TIMEVAL_TO_TIMESPEC (&tv, &ts);
 159       ++ts.tv_sec;
 160       e = pthread_rwlock_timedrdlock (&r, &ts);
 161       if (e == 0)
 162         {
 163           puts ("timedrdlock succeeded");
 164           exit (1);
 165         }
 166       if (e != EDEADLK)
 167         {
 168           puts ("timedrdlock did not return EDEADLK");
 169           exit (1);
 170         }
 171
 172       puts ("1st timedrdlock done");
 173
 174       (void) gettimeofday (&tv, NULL);
 175       TIMEVAL_TO_TIMESPEC (&tv, &ts);
 176       ++ts.tv_sec;
 177       e = pthread_rwlock_timedwrlock (&r, &ts);
 178       if (e == 0)
 179         {
 180           puts ("2nd timedwrlock succeeded");
 181           exit (1);
 182         }
 183       if (e != EDEADLK)
 184         {
 185           puts ("2nd timedwrlock did not return EDEADLK");
 186           exit (1);
 187         }
 188
 189       puts ("2nd timedwrlock done");
 190
 191       pthread_t th;
 192       if (pthread_create (&th, NULL, tf, &r) != 0)
 193         {
 194           printf ("round %Zu: create failed\n", cnt);
 195           exit (1);
 196         }
 197
 198       puts ("started thread");
 199
 200       void *status;
 201       if (pthread_join (th, &status) != 0)
 202         {
 203           printf ("round %Zu: join failed\n", cnt);
 204           exit (1);
 205         }
 206       if (status != NULL)
 207         {
 208           printf ("failure in round %Zu\n", cnt);
 209           exit (1);
 210         }
 211
 212       puts ("joined thread");
 213
 214       if (pthread_rwlock_destroy (&r) != 0)
 215         {
 216           printf ("round %Zu: rwlock_destroy failed\n", cnt);
 217           exit (1);
 218         }
 219     }
 220
 221   return 0;
 222 }
 223
 224 #define TEST_FUNCTION do_test ()
 225 #include "../test-skeleton.c"