rt/tst-aio2.c

   1 /* Test for notification mechanism in lio_listio.
   2    Copyright (C) 2000-2023 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
  28 static pthread_barrier_t b;
  29
  30
  31 static void
  32 thrfct (sigval_t arg)
  33 {
  34   int e = pthread_barrier_wait (&b);
  35   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  36     {
  37       puts ("thread: barrier_wait failed");
  38       exit (1);
  39     }
  40 }
  41
  42
  43 static int
  44 do_test (int argc, char *argv[])
  45 {
  46   char name[] = "/tmp/aio2.XXXXXX";
  47   int fd;
  48   struct aiocb *arr[1];
  49   struct aiocb cb;
  50   static const char buf[] = "Hello World\n";
  51
  52   fd = mkstemp (name);
  53   if (fd == -1)
  54     {
  55       printf ("cannot open temp name: %m\n");
  56       return 1;
  57     }
  58
  59   unlink (name);
  60
  61   if (pthread_barrier_init (&b, NULL, 2) != 0)
  62     {
  63       puts ("barrier_init failed");
  64       return 1;
  65     }
  66
  67   arr[0] = &cb;
  68
  69   cb.aio_fildes = fd;
  70   cb.aio_lio_opcode = LIO_WRITE;
  71   cb.aio_reqprio = 0;
  72   cb.aio_buf = (void *) buf;
  73   cb.aio_nbytes = sizeof (buf) - 1;
  74   cb.aio_offset = 0;
  75   cb.aio_sigevent.sigev_notify = SIGEV_THREAD;
  76   cb.aio_sigevent.sigev_notify_function = thrfct;
  77   cb.aio_sigevent.sigev_notify_attributes = NULL;
  78   cb.aio_sigevent.sigev_value.sival_ptr = NULL;
  79
  80   if (lio_listio (LIO_WAIT, arr, 1, NULL) < 0)
  81     {
  82       if (errno == ENOSYS)
  83         {
  84           puts ("no aio support in this configuration");
  85           return 0;
  86         }
  87       printf ("lio_listio failed: %m\n");
  88       return 1;
  89     }
  90
  91   puts ("lio_listio returned");
  92
  93   int e = pthread_barrier_wait (&b);
  94   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  95     {
  96       puts ("barrier_wait failed");
  97       return 1;
  98     }
  99
 100   puts ("all OK");
 101
 102   return 0;
 103 }
 104
 105 #include "../test-skeleton.c"