rt/tst-aio6.c

   1 /* Test for timeout handling.
   2    Copyright (C) 2000-2017 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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <aio.h>
  20 #include <errno.h>
  21 #include <stdio.h>
  22 #include <unistd.h>
  23 #include <sys/time.h>
  24
  25
  26 /* We expect to wait for 3 seconds so we have to increase the timeout.  */
  27 #define TIMEOUT 10 /* sec */
  28
  29
  30 #define TEST_FUNCTION do_test ()
  31 static int
  32 do_test (void)
  33 {
  34   struct aiocb *arr[1];
  35   struct aiocb cb;
  36   char buf[100];
  37   struct timeval before;
  38   struct timeval after;
  39   struct timespec timeout;
  40   int fd[2];
  41   int result = 0;
  42
  43   if (pipe (fd) != 0)
  44     {
  45       printf ("cannot create pipe: %m\n");
  46       return 1;
  47     }
  48
  49   arr[0] = &cb;
  50
  51   cb.aio_fildes = fd[0];
  52   cb.aio_lio_opcode = LIO_WRITE;
  53   cb.aio_reqprio = 0;
  54   cb.aio_buf = (void *) buf;
  55   cb.aio_nbytes = sizeof (buf) - 1;
  56   cb.aio_offset = 0;
  57   cb.aio_sigevent.sigev_notify = SIGEV_NONE;
  58
  59   /* Try to read from stdin where nothing will be available.  */
  60   if (aio_read (arr[0]) < 0)
  61     {
  62       if (errno == ENOSYS)
  63         {
  64           puts ("no aio support in this configuration");
  65           return 0;
  66         }
  67       printf ("aio_read failed: %m\n");
  68       return 1;
  69     }
  70
  71   /* Get the current time.  */
  72   gettimeofday (&before, NULL);
  73
  74   /* Wait for input which is unsuccessful and therefore the function will
  75      time out.  */
  76   timeout.tv_sec = 3;
  77   timeout.tv_nsec = 0;
  78   if (aio_suspend ((const struct aiocb *const*) arr, 1, &timeout) != -1)
  79     {
  80       puts ("aio_suspend() didn't return -1");
  81       result = 1;
  82     }
  83   else if (errno != EAGAIN)
  84     {
  85       puts ("error not set to EAGAIN");
  86       result = 1;
  87     }
  88   else
  89     {
  90       gettimeofday (&after, NULL);
  91       if (after.tv_sec < before.tv_sec + 1)
  92         {
  93           puts ("timeout came too early");
  94           result = 1;
  95         }
  96     }
  97
  98   return result;
  99 }
 100
 101 #include "../test-skeleton.c"