rt/tst-aio3.c

   1 /* Test for notification mechanism in lio_listio.
   2    Copyright (C) 2000-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 <aio.h>
  20 #include <signal.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24 #include <errno.h>
  25 #include <pthread.h>
  26
  27 static pthread_barrier_t b;
  28
  29
  30 static void
  31 thrfct (sigval_t arg)
  32 {
  33   int e = pthread_barrier_wait (&b);
  34   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  35     {
  36       puts ("child: barrier_wait failed");
  37       exit (1);
  38     }
  39 }
  40
  41
  42 static int
  43 do_test (int argc, char *argv[])
  44 {
  45   char name[] = "/tmp/aio3.XXXXXX";
  46   int fd;
  47   struct aiocb *arr[1];
  48   struct aiocb cb;
  49   static const char buf[] = "Hello World\n";
  50
  51   fd = mkstemp (name);
  52   if (fd == -1)
  53     {
  54       printf ("cannot open temp name: %m\n");
  55       return 1;
  56     }
  57
  58   unlink (name);
  59
  60   if (pthread_barrier_init (&b, NULL, 2) != 0)
  61     {
  62       puts ("barrier_init failed");
  63       return 1;
  64     }
  65
  66   arr[0] = &cb;
  67
  68   cb.aio_fildes = fd;
  69   cb.aio_lio_opcode = LIO_WRITE;
  70   cb.aio_reqprio = 0;
  71   cb.aio_buf = (void *) buf;
  72   cb.aio_nbytes = sizeof (buf) - 1;
  73   cb.aio_offset = 0;
  74   cb.aio_sigevent.sigev_notify = SIGEV_THREAD;
  75   cb.aio_sigevent.sigev_notify_function = thrfct;
  76   cb.aio_sigevent.sigev_notify_attributes = NULL;
  77   cb.aio_sigevent.sigev_value.sival_ptr = NULL;
  78
  79   if (lio_listio (LIO_NOWAIT, arr, 1, NULL) < 0)
  80     {
  81       if (errno == ENOSYS)
  82         {
  83           puts ("no aio support in this configuration");
  84           return 0;
  85         }
  86       printf ("lio_listio failed: %m\n");
  87       return 1;
  88     }
  89
  90   if (aio_suspend ((const struct aiocb *const *) arr, 1, NULL) < 0)
  91     {
  92       printf ("aio_suspend failed: %m\n");
  93       return 1;
  94     }
  95
  96   int e = pthread_barrier_wait (&b);
  97   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  98     {
  99       puts ("parent: barrier_wait failed");
 100       return 1;
 101     }
 102
 103   puts ("all OK");
 104
 105   return 0;
 106 }
 107
 108 #include "../test-skeleton.c"