nptl/tst-rwlock7.c

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