glibc/rt/tst-aio5.c

/* Test for completion thread handling.
   Copyright (C) 2000-2022 Free Software Foundation, Inc.
   This file is part of the GNU C Library.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <https://www.gnu.org/licenses/>.  */

#include <aio.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>

#define MY_SIVAL 27

volatile sig_atomic_t flag;


static void
callback (sigval_t s)
{
  flag = s.sival_int;
}

static int
wait_flag (void)
{
  while (flag == 0)
    {
      puts ("Sleeping...");
      sleep (1);
    }

  if (flag != MY_SIVAL)
    {
      printf ("signal handler received wrong signal, flag is %d\n", flag);
      return 1;
    }

  return 0;
}


static int
do_test (int argc, char *argv[])
{
  char name[] = "/tmp/aio5.XXXXXX";
  int fd;
  struct aiocb *arr[1];
  struct aiocb cb;
  static const char buf[] = "Hello World\n";
  struct sigevent ev;

  fd = mkstemp (name);
  if (fd == -1)
    {
      printf ("cannot open temp name: %m\n");
      return 1;
    }

  unlink (name);

  arr[0] = &cb;

  cb.aio_fildes = fd;
  cb.aio_lio_opcode = LIO_WRITE;
  cb.aio_reqprio = 0;
  cb.aio_buf = (void *) buf;
  cb.aio_nbytes = sizeof (buf) - 1;
  cb.aio_offset = 0;
  cb.aio_sigevent.sigev_notify = SIGEV_THREAD;
  cb.aio_sigevent.sigev_notify_function = callback;
  cb.aio_sigevent.sigev_notify_attributes = NULL;
  cb.aio_sigevent.sigev_value.sival_int = MY_SIVAL;

  ev.sigev_notify = SIGEV_THREAD;
  ev.sigev_notify_function = callback;
  ev.sigev_notify_attributes = NULL;
  ev.sigev_value.sival_int = MY_SIVAL;

  /* First use aio_write.  */
  if (aio_write (arr[0]) < 0)
    {
      if (errno == ENOSYS)
	{
	  puts ("no aio support in this configuration");
	  return 0;
	}
      printf ("aio_write failed: %m\n");
      return 1;
    }

  if (wait_flag ())
    return 1;

  puts ("aio_write OK");

  flag = 0;
  /* Again with lio_listio.  */
  if (lio_listio (LIO_NOWAIT, arr, 1, &ev) < 0)
    {
      printf ("lio_listio failed: %m\n");
      return 1;
    }

  if (wait_flag ())
    return 1;

  puts ("all OK");

  return 0;
}

#include "../test-skeleton.c"