rt/tst-mqueue8.c

   1 /* Copyright (C) 2004-2019 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Jakub Jelinek <jakub@redhat.com>, 2004.
   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 <mqueue.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #if _POSIX_THREADS
  26 # include <pthread.h>
  27
  28 static pthread_barrier_t b;
  29
  30 /* Cleanup handling test.  */
  31 static int cl_called;
  32
  33 static void
  34 cl (void *arg)
  35 {
  36   ++cl_called;
  37 }
  38
  39 #define TF_MQ_RECEIVE           0L
  40 #define TF_MQ_TIMEDRECEIVE      1L
  41 #define TF_MQ_SEND              2L
  42 #define TF_MQ_TIMEDSEND         3L
  43
  44 static const char *names[]
  45   = { "mq_receive", "mq_timedreceive", "mq_send", "mq_timedsend" };
  46
  47 static mqd_t q;
  48 static struct timespec never;
  49
  50 static void *
  51 tf (void *arg)
  52 {
  53   int r = pthread_barrier_wait (&b);
  54   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  55     {
  56       puts ("tf: barrier_wait failed");
  57       exit (1);
  58     }
  59
  60   pthread_cleanup_push (cl, NULL);
  61
  62   char c = ' ';
  63
  64   switch ((long) arg)
  65     {
  66     case TF_MQ_SEND:
  67       TEMP_FAILURE_RETRY (mq_send (q, &c, 1, 1));
  68       break;
  69     case TF_MQ_TIMEDSEND:
  70       TEMP_FAILURE_RETRY (mq_timedsend (q, &c, 1, 1, &never));
  71       break;
  72     case TF_MQ_RECEIVE:
  73       TEMP_FAILURE_RETRY (mq_receive (q, &c, 1, NULL));
  74       break;
  75     case TF_MQ_TIMEDRECEIVE:
  76       TEMP_FAILURE_RETRY (mq_timedreceive (q, &c, 1, NULL, &never));
  77       break;
  78     }
  79
  80   pthread_cleanup_pop (0);
  81
  82   printf ("tf: %s returned\n", names[(long) arg]);
  83
  84   exit (1);
  85 }
  86
  87 #define TEST_FUNCTION do_test ()
  88 static int
  89 do_test (void)
  90 {
  91   char name[sizeof "/tst-mqueue8-" + sizeof (pid_t) * 3];
  92   snprintf (name, sizeof (name), "/tst-mqueue8-%u", getpid ());
  93
  94   struct mq_attr attr = { .mq_maxmsg = 1, .mq_msgsize = 1 };
  95   q = mq_open (name, O_CREAT | O_EXCL | O_RDWR, 0600, &attr);
  96
  97   if (q == (mqd_t) -1)
  98     {
  99       printf ("mq_open failed with: %m\n");
 100       return 0;
 101     }
 102
 103   if (mq_unlink (name) != 0)
 104     {
 105       printf ("mq_unlink failed with: %m\n");
 106       return 1;
 107     }
 108
 109   if (pthread_barrier_init (&b, NULL, 2) != 0)
 110     {
 111       puts ("barrier_init failed");
 112       return 1;
 113     }
 114
 115   if (clock_gettime (CLOCK_REALTIME, &never) == 0)
 116     never.tv_sec += 100;
 117   else
 118     {
 119       never.tv_sec = time (NULL) + 100;
 120       never.tv_nsec = 0;
 121     }
 122
 123   int result = 0;
 124   for (long l = TF_MQ_RECEIVE; l <= TF_MQ_TIMEDSEND; ++l)
 125     {
 126       cl_called = 0;
 127
 128       pthread_t th;
 129       if (pthread_create (&th, NULL, tf, (void *) l) != 0)
 130         {
 131           printf ("1st %s create failed\n", names[l]);
 132           result = 1;
 133           continue;
 134         }
 135
 136       int r = pthread_barrier_wait (&b);
 137       if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 138         {
 139           puts ("barrier_wait failed");
 140           result = 1;
 141           continue;
 142         }
 143
 144       struct timespec ts = { .tv_sec = 0, .tv_nsec = 100000000 };
 145       while (nanosleep (&ts, &ts) != 0)
 146         continue;
 147
 148       printf ("going to cancel %s in-time\n", names[l]);
 149       if (pthread_cancel (th) != 0)
 150         {
 151           printf ("1st cancel of %s failed\n", names[l]);
 152           result = 1;
 153           continue;
 154         }
 155
 156       void *status;
 157       if (pthread_join (th, &status) != 0)
 158         {
 159           printf ("1st join of %s failed\n", names[l]);
 160           result = 1;
 161           continue;
 162         }
 163       if (status != PTHREAD_CANCELED)
 164         {
 165           printf ("1st %s thread not canceled\n", names[l]);
 166           result = 1;
 167           continue;
 168         }
 169
 170       if (cl_called == 0)
 171         {
 172           printf ("%s cleanup handler not called\n", names[l]);
 173           result = 1;
 174           continue;
 175         }
 176       if (cl_called > 1)
 177         {
 178           printf ("%s cleanup handler called more than once\n", names[l]);
 179           result = 1;
 180           continue;
 181         }
 182
 183       printf ("in-time %s cancellation succeeded\n", names[l]);
 184
 185       cl_called = 0;
 186
 187       if (pthread_create (&th, NULL, tf, (void *) l) != 0)
 188         {
 189           printf ("2nd %s create failed\n", names[l]);
 190           result = 1;
 191           continue;
 192         }
 193
 194       printf ("going to cancel %s early\n", names[l]);
 195       if (pthread_cancel (th) != 0)
 196         {
 197           printf ("2nd cancel of %s failed\n", names[l]);
 198           result = 1;
 199           continue;
 200         }
 201
 202       r = pthread_barrier_wait (&b);
 203       if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 204         {
 205           puts ("barrier_wait failed");
 206           result = 1;
 207           continue;
 208         }
 209
 210       if (pthread_join (th, &status) != 0)
 211         {
 212           printf ("2nd join of %s failed\n", names[l]);
 213           result = 1;
 214           continue;
 215         }
 216       if (status != PTHREAD_CANCELED)
 217         {
 218           printf ("2nd %s thread not canceled\n", names[l]);
 219           result = 1;
 220           continue;
 221         }
 222
 223       if (cl_called == 0)
 224         {
 225           printf ("%s cleanup handler not called\n", names[l]);
 226           result = 1;
 227           continue;
 228         }
 229       if (cl_called > 1)
 230         {
 231           printf ("%s cleanup handler called more than once\n", names[l]);
 232           result = 1;
 233           continue;
 234         }
 235
 236       printf ("early %s cancellation succeeded\n", names[l]);
 237
 238       if (l == TF_MQ_TIMEDRECEIVE)
 239         {
 240           /* mq_receive and mq_timedreceive are tested on empty mq.
 241              For mq_send and mq_timedsend we need to make it full.
 242              If this fails, there is no point in doing further testing.  */
 243           char c = ' ';
 244           if (mq_send (q, &c, 1, 1) != 0)
 245             {
 246               printf ("mq_send failed: %m\n");
 247               result = 1;
 248               break;
 249             }
 250         }
 251     }
 252
 253   if (mq_close (q) != 0)
 254     {
 255       printf ("mq_close failed: %m\n");
 256       result = 1;
 257     }
 258
 259   return result;
 260 }
 261 #else
 262 # define TEST_FUNCTION 0
 263 #endif
 264
 265 #include "../test-skeleton.c"