nptl/tst-rwlock6.c

   1 /* Copyright (C) 2002-2021 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 <stdlib.h>
  22 #include <stdio.h>
  23 #include <string.h>
  24 #include <sys/time.h>
  25 #include <support/check.h>
  26 #include <support/test-driver.h>
  27 #include <support/timespec.h>
  28 #include <support/xthread.h>
  29 #include <support/xtime.h>
  30
  31
  32 /* A bogus clock value that tells run_test to use pthread_rwlock_timedrdlock
  33    and pthread_rwlock_timedwrlock rather than pthread_rwlock_clockrdlock and
  34    pthread_rwlock_clockwrlock.  */
  35 #define CLOCK_USE_TIMEDLOCK (-1)
  36
  37 static int kind[] =
  38   {
  39     PTHREAD_RWLOCK_PREFER_READER_NP,
  40     PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP,
  41     PTHREAD_RWLOCK_PREFER_WRITER_NP,
  42   };
  43
  44 struct thread_args
  45 {
  46   pthread_rwlock_t *rwlock;
  47   clockid_t clockid;
  48   const char *fnname;
  49 };
  50
  51 static void *
  52 tf (void *arg)
  53 {
  54   struct thread_args *args = arg;
  55   pthread_rwlock_t *r = args->rwlock;
  56   const clockid_t clockid = args->clockid;
  57   const clockid_t clockid_for_get =
  58     (clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid;
  59   const char *fnname = args->fnname;
  60
  61   /* Timeout: 0.3 secs.  */
  62   struct timespec ts_start;
  63   xclock_gettime (clockid_for_get, &ts_start);
  64
  65   struct timespec ts_timeout = timespec_add (ts_start,
  66                                              make_timespec (0, 300000000));
  67
  68   verbose_printf ("child calling %srdlock\n", fnname);
  69
  70   if (clockid == CLOCK_USE_TIMEDLOCK)
  71     TEST_COMPARE (pthread_rwlock_timedrdlock (r, &ts_timeout), ETIMEDOUT);
  72   else
  73     TEST_COMPARE (pthread_rwlock_clockrdlock (r, clockid, &ts_timeout),
  74                   ETIMEDOUT);
  75
  76   verbose_printf ("1st child %srdlock done\n", fnname);
  77
  78   TEST_TIMESPEC_NOW_OR_AFTER (CLOCK_REALTIME, ts_timeout);
  79
  80   xclock_gettime (clockid_for_get, &ts_timeout);
  81   ts_timeout.tv_sec += 10;
  82   /* Note that the following operation makes ts invalid.  */
  83   ts_timeout.tv_nsec += 1000000000;
  84
  85   if (clockid == CLOCK_USE_TIMEDLOCK)
  86     TEST_COMPARE (pthread_rwlock_timedrdlock (r, &ts_timeout), EINVAL);
  87   else
  88     TEST_COMPARE (pthread_rwlock_clockrdlock (r, clockid, &ts_timeout), EINVAL);
  89
  90   verbose_printf ("2nd child %srdlock done\n", fnname);
  91
  92   return NULL;
  93 }
  94
  95
  96 static int
  97 do_test_clock (clockid_t clockid, const char *fnname)
  98 {
  99   const clockid_t clockid_for_get =
 100     (clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid;
 101   size_t cnt;
 102   for (cnt = 0; cnt < sizeof (kind) / sizeof (kind[0]); ++cnt)
 103     {
 104       pthread_rwlock_t r;
 105       pthread_rwlockattr_t a;
 106
 107       if (pthread_rwlockattr_init (&a) != 0)
 108         FAIL_EXIT1 ("round %Zu: rwlockattr_t failed\n", cnt);
 109
 110       if (pthread_rwlockattr_setkind_np (&a, kind[cnt]) != 0)
 111         FAIL_EXIT1 ("round %Zu: rwlockattr_setkind failed\n", cnt);
 112
 113       if (pthread_rwlock_init (&r, &a) != 0)
 114         FAIL_EXIT1 ("round %Zu: rwlock_init failed\n", cnt);
 115
 116       if (pthread_rwlockattr_destroy (&a) != 0)
 117         FAIL_EXIT1 ("round %Zu: rwlockattr_destroy failed\n", cnt);
 118
 119       struct timespec ts;
 120       xclock_gettime (clockid_for_get, &ts);
 121       ++ts.tv_sec;
 122
 123       /* Get a write lock.  */
 124       int e = (clockid == CLOCK_USE_TIMEDLOCK)
 125         ? pthread_rwlock_timedwrlock (&r, &ts)
 126         : pthread_rwlock_clockwrlock (&r, clockid, &ts);
 127       if (e != 0)
 128         FAIL_EXIT1 ("round %Zu: %swrlock failed (%d)\n",
 129                     cnt, fnname, e);
 130
 131       verbose_printf ("1st %swrlock done\n", fnname);
 132
 133       xclock_gettime (clockid_for_get, &ts);
 134       ++ts.tv_sec;
 135       if (clockid == CLOCK_USE_TIMEDLOCK)
 136         TEST_COMPARE (pthread_rwlock_timedrdlock (&r, &ts), EDEADLK);
 137       else
 138         TEST_COMPARE (pthread_rwlock_clockrdlock (&r, clockid, &ts), EDEADLK);
 139
 140       verbose_printf ("1st %srdlock done\n", fnname);
 141
 142       xclock_gettime (clockid_for_get, &ts);
 143       ++ts.tv_sec;
 144       if (clockid == CLOCK_USE_TIMEDLOCK)
 145         TEST_COMPARE (pthread_rwlock_timedwrlock (&r, &ts), EDEADLK);
 146       else
 147         TEST_COMPARE (pthread_rwlock_clockwrlock (&r, clockid, &ts), EDEADLK);
 148
 149       verbose_printf ("2nd %swrlock done\n", fnname);
 150
 151       struct thread_args args;
 152       args.rwlock = &r;
 153       args.clockid = clockid;
 154       args.fnname = fnname;
 155       pthread_t th = xpthread_create (NULL, tf, &args);
 156
 157       puts ("started thread");
 158
 159       (void) xpthread_join (th);
 160
 161       puts ("joined thread");
 162
 163       if (pthread_rwlock_destroy (&r) != 0)
 164         FAIL_EXIT1 ("round %Zu: rwlock_destroy failed\n", cnt);
 165     }
 166
 167   return 0;
 168 }
 169
 170 static int do_test (void)
 171 {
 172   do_test_clock (CLOCK_USE_TIMEDLOCK, "timed");
 173   do_test_clock (CLOCK_REALTIME, "clock(realtime)");
 174   do_test_clock (CLOCK_MONOTONIC, "clock(monotonic)");
 175   return 0;
 176 }
 177
 178 #include <support/test-driver.c>