rt/tst-aio2.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    Contributed by Ulrich Drepper <drepper@cygnus.com>, 2000.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <https://www.gnu.org/licenses/>.  */
  19
  20 #include <aio.h>
  21 #include <signal.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <errno.h>
  26 #include <pthread.h>
  27
  28
  29 static pthread_barrier_t b;
  30
  31
  32 static void
  33 thrfct (sigval_t arg)
  34 {
  35   int e = pthread_barrier_wait (&b);
  36   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  37     {
  38       puts ("thread: barrier_wait failed");
  39       exit (1);
  40     }
  41 }
  42
  43
  44 static int
  45 do_test (int argc, char *argv[])
  46 {
  47   char name[] = "/tmp/aio2.XXXXXX";
  48   int fd;
  49   struct aiocb *arr[1];
  50   struct aiocb cb;
  51   static const char buf[] = "Hello World\n";
  52
  53   fd = mkstemp (name);
  54   if (fd == -1)
  55     {
  56       printf ("cannot open temp name: %m\n");
  57       return 1;
  58     }
  59
  60   unlink (name);
  61
  62   if (pthread_barrier_init (&b, NULL, 2) != 0)
  63     {
  64       puts ("barrier_init failed");
  65       return 1;
  66     }
  67
  68   arr[0] = &cb;
  69
  70   cb.aio_fildes = fd;
  71   cb.aio_lio_opcode = LIO_WRITE;
  72   cb.aio_reqprio = 0;
  73   cb.aio_buf = (void *) buf;
  74   cb.aio_nbytes = sizeof (buf) - 1;
  75   cb.aio_offset = 0;
  76   cb.aio_sigevent.sigev_notify = SIGEV_THREAD;
  77   cb.aio_sigevent.sigev_notify_function = thrfct;
  78   cb.aio_sigevent.sigev_notify_attributes = NULL;
  79   cb.aio_sigevent.sigev_value.sival_ptr = NULL;
  80
  81   if (lio_listio (LIO_WAIT, arr, 1, NULL) < 0)
  82     {
  83       if (errno == ENOSYS)
  84         {
  85           puts ("no aio support in this configuration");
  86           return 0;
  87         }
  88       printf ("lio_listio failed: %m\n");
  89       return 1;
  90     }
  91
  92   puts ("lio_listio returned");
  93
  94   int e = pthread_barrier_wait (&b);
  95   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  96     {
  97       puts ("barrier_wait failed");
  98       return 1;
  99     }
 100
 101   puts ("all OK");
 102
 103   return 0;
 104 }
 105
 106 #include "../test-skeleton.c"