rt/tst-aio6.c

   1 /* Test for timeout handling.
   2    Copyright (C) 2000, 2002 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <aio.h>
  21 #include <errno.h>
  22 #include <stdio.h>
  23 #include <unistd.h>
  24 #include <sys/time.h>
  25
  26
  27 /* We expect to wait for 3 seconds so we have to increase the timeout.  */
  28 #define TIMEOUT 10 /* sec */
  29
  30
  31 #define TEST_FUNCTION do_test ()
  32 static int
  33 do_test (void)
  34 {
  35   struct aiocb *arr[1];
  36   struct aiocb cb;
  37   char buf[100];
  38   struct timeval before;
  39   struct timeval after;
  40   struct timespec timeout;
  41   int fd[2];
  42   int result = 0;
  43
  44   if (pipe (fd) != 0)
  45     {
  46       printf ("cannot create pipe: %m\n");
  47       return 1;
  48     }
  49
  50   arr[0] = &cb;
  51
  52   cb.aio_fildes = fd[0];
  53   cb.aio_lio_opcode = LIO_WRITE;
  54   cb.aio_reqprio = 0;
  55   cb.aio_buf = (void *) buf;
  56   cb.aio_nbytes = sizeof (buf) - 1;
  57   cb.aio_offset = 0;
  58   cb.aio_sigevent.sigev_notify = SIGEV_NONE;
  59
  60   /* Try to read from stdin where nothing will be available.  */
  61   if (aio_read (arr[0]) < 0)
  62     {
  63       if (errno == ENOSYS)
  64         {
  65           puts ("no aio support in this configuration");
  66           return 0;
  67         }
  68       printf ("aio_read failed: %m\n");
  69       return 1;
  70     }
  71
  72   /* Get the current time.  */
  73   gettimeofday (&before, NULL);
  74
  75   /* Wait for input which is unsuccessful and therefore the function will
  76      time out.  */
  77   timeout.tv_sec = 3;
  78   timeout.tv_nsec = 0;
  79   if (aio_suspend ((const struct aiocb *const*) arr, 1, &timeout) != -1)
  80     {
  81       puts ("aio_suspend() didn't return -1");
  82       result = 1;
  83     }
  84   else if (errno != EAGAIN)
  85     {
  86       puts ("error not set to EAGAIN");
  87       result = 1;
  88     }
  89   else
  90     {
  91       gettimeofday (&after, NULL);
  92       if (after.tv_sec < before.tv_sec + 1)
  93         {
  94           puts ("timeout came too early");
  95           result = 1;
  96         }
  97     }
  98
  99   return result;
 100 }
 101
 102 #include "../test-skeleton.c"