nptl/tst-rwlock6.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 <stdlib.h>
  21 #include <stdio.h>
  22 #include <string.h>
  23 #include <sys/time.h>
  24 #include <support/check.h>
  25 #include <support/test-driver.h>
  26 #include <support/timespec.h>
  27 #include <support/xthread.h>
  28 #include <support/xtime.h>
  29
  30
  31 /* A bogus clock value that tells run_test to use pthread_rwlock_timedrdlock
  32    and pthread_rwlock_timedwrlock rather than pthread_rwlock_clockrdlock and
  33    pthread_rwlock_clockwrlock.  */
  34 #define CLOCK_USE_TIMEDLOCK (-1)
  35
  36 static int kind[] =
  37   {
  38     PTHREAD_RWLOCK_PREFER_READER_NP,
  39     PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,
  40     PTHREAD_RWLOCK_PREFER_WRITER_NP,
  41   };
  42
  43 struct thread_args
  44 {
  45   pthread_rwlock_t *rwlock;
  46   clockid_t clockid;
  47   const char *fnname;
  48 };
  49
  50 static void *
  51 tf (void *arg)
  52 {
  53   struct thread_args *args = arg;
  54   pthread_rwlock_t *r = args->rwlock;
  55   const clockid_t clockid = args->clockid;
  56   const clockid_t clockid_for_get =
  57     (clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid;
  58   const char *fnname = args->fnname;
  59
  60   /* Timeout: 0.3 secs.  */
  61   struct timespec ts_start;
  62   xclock_gettime (clockid_for_get, &ts_start);
  63
  64   struct timespec ts_timeout = timespec_add (ts_start,
  65                                              make_timespec (0, 300000000));
  66
  67   verbose_printf ("child calling %srdlock\n", fnname);
  68
  69   if (clockid == CLOCK_USE_TIMEDLOCK)
  70     TEST_COMPARE (pthread_rwlock_timedrdlock (r, &ts_timeout), ETIMEDOUT);
  71   else
  72     TEST_COMPARE (pthread_rwlock_clockrdlock (r, clockid, &ts_timeout),
  73                   ETIMEDOUT);
  74
  75   verbose_printf ("1st child %srdlock done\n", fnname);
  76
  77   TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts_timeout);
  78
  79   xclock_gettime (clockid_for_get, &ts_timeout);
  80   ts_timeout.tv_sec += 10;
  81   /* Note that the following operation makes ts invalid.  */
  82   ts_timeout.tv_nsec += 1000000000;
  83
  84   if (clockid == CLOCK_USE_TIMEDLOCK)
  85     TEST_COMPARE (pthread_rwlock_timedrdlock (r, &ts_timeout), EINVAL);
  86   else
  87     TEST_COMPARE (pthread_rwlock_clockrdlock (r, clockid, &ts_timeout), EINVAL);
  88
  89   verbose_printf ("2nd child %srdlock done\n", fnname);
  90
  91   return NULL;
  92 }
  93
  94
  95 static int
  96 do_test_clock (clockid_t clockid, const char *fnname)
  97 {
  98   const clockid_t clockid_for_get =
  99     (clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid;
 100   size_t cnt;
 101   for (cnt = 0; cnt < sizeof (kind) / sizeof (kind[0]); ++cnt)
 102     {
 103       pthread_rwlock_t r;
 104       pthread_rwlockattr_t a;
 105
 106       if (pthread_rwlockattr_init (&a) != 0)
 107         FAIL_EXIT1 ("round %zu: rwlockattr_t failed\n", cnt);
 108
 109       if (pthread_rwlockattr_setkind_np (&a, kind[cnt]) != 0)
 110         FAIL_EXIT1 ("round %zu: rwlockattr_setkind failed\n", cnt);
 111
 112       if (pthread_rwlock_init (&r, &a) != 0)
 113         FAIL_EXIT1 ("round %zu: rwlock_init failed\n", cnt);
 114
 115       if (pthread_rwlockattr_destroy (&a) != 0)
 116         FAIL_EXIT1 ("round %zu: rwlockattr_destroy failed\n", cnt);
 117
 118       struct timespec ts;
 119       xclock_gettime (clockid_for_get, &ts);
 120       ++ts.tv_sec;
 121
 122       /* Get a write lock.  */
 123       int e = (clockid == CLOCK_USE_TIMEDLOCK)
 124         ? pthread_rwlock_timedwrlock (&r, &ts)
 125         : pthread_rwlock_clockwrlock (&r, clockid, &ts);
 126       if (e != 0)
 127         FAIL_EXIT1 ("round %zu: %swrlock failed (%d)\n",
 128                     cnt, fnname, e);
 129
 130       verbose_printf ("1st %swrlock done\n", fnname);
 131
 132       xclock_gettime (clockid_for_get, &ts);
 133       ++ts.tv_sec;
 134       if (clockid == CLOCK_USE_TIMEDLOCK)
 135         TEST_COMPARE (pthread_rwlock_timedrdlock (&r, &ts), EDEADLK);
 136       else
 137         TEST_COMPARE (pthread_rwlock_clockrdlock (&r, clockid, &ts), EDEADLK);
 138
 139       verbose_printf ("1st %srdlock done\n", fnname);
 140
 141       xclock_gettime (clockid_for_get, &ts);
 142       ++ts.tv_sec;
 143       if (clockid == CLOCK_USE_TIMEDLOCK)
 144         TEST_COMPARE (pthread_rwlock_timedwrlock (&r, &ts), EDEADLK);
 145       else
 146         TEST_COMPARE (pthread_rwlock_clockwrlock (&r, clockid, &ts), EDEADLK);
 147
 148       verbose_printf ("2nd %swrlock done\n", fnname);
 149
 150       struct thread_args args;
 151       args.rwlock = &r;
 152       args.clockid = clockid;
 153       args.fnname = fnname;
 154       pthread_t th = xpthread_create (NULL, tf, &args);
 155
 156       puts ("started thread");
 157
 158       (void) xpthread_join (th);
 159
 160       puts ("joined thread");
 161
 162       if (pthread_rwlock_destroy (&r) != 0)
 163         FAIL_EXIT1 ("round %zu: rwlock_destroy failed\n", cnt);
 164     }
 165
 166   return 0;
 167 }
 168
 169 static int do_test (void)
 170 {
 171   do_test_clock (CLOCK_USE_TIMEDLOCK, "timed");
 172   do_test_clock (CLOCK_REALTIME, "clock(realtime)");
 173   do_test_clock (CLOCK_MONOTONIC, "clock(monotonic)");
 174   return 0;
 175 }
 176
 177 #include <support/test-driver.c>