rt/tst-aio5.c

   1 /* Test for completion thread 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 <signal.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24 #include <errno.h>
  25
  26 /* We might need a bit longer timeout.  */
  27 #define TIMEOUT 10 /* sec */
  28
  29 #define MY_SIVAL 27
  30
  31 volatile sig_atomic_t flag;
  32
  33
  34 static void
  35 callback (sigval_t s)
  36 {
  37   flag = s.sival_int;
  38 }
  39
  40 static int
  41 wait_flag (void)
  42 {
  43   while (flag == 0)
  44     {
  45       puts ("Sleeping...");
  46       sleep (1);
  47     }
  48
  49   if (flag != MY_SIVAL)
  50     {
  51       printf ("signal handler received wrong signal, flag is %d\n", flag);
  52       return 1;
  53     }
  54
  55   return 0;
  56 }
  57
  58
  59 static int
  60 do_test (int argc, char *argv[])
  61 {
  62   char name[] = "/tmp/aio5.XXXXXX";
  63   int fd;
  64   struct aiocb *arr[1];
  65   struct aiocb cb;
  66   static const char buf[] = "Hello World\n";
  67   struct sigevent ev;
  68
  69   fd = mkstemp (name);
  70   if (fd == -1)
  71     {
  72       printf ("cannot open temp name: %m\n");
  73       return 1;
  74     }
  75
  76   unlink (name);
  77
  78   arr[0] = &cb;
  79
  80   cb.aio_fildes = fd;
  81   cb.aio_lio_opcode = LIO_WRITE;
  82   cb.aio_reqprio = 0;
  83   cb.aio_buf = (void *) buf;
  84   cb.aio_nbytes = sizeof (buf) - 1;
  85   cb.aio_offset = 0;
  86   cb.aio_sigevent.sigev_notify = SIGEV_THREAD;
  87   cb.aio_sigevent.sigev_notify_function = callback;
  88   cb.aio_sigevent.sigev_notify_attributes = NULL;
  89   cb.aio_sigevent.sigev_value.sival_int = MY_SIVAL;
  90
  91   ev.sigev_notify = SIGEV_THREAD;
  92   ev.sigev_notify_function = callback;
  93   ev.sigev_notify_attributes = NULL;
  94   ev.sigev_value.sival_int = MY_SIVAL;
  95
  96   /* First use aio_write.  */
  97   if (aio_write (arr[0]) < 0)
  98     {
  99       if (errno == ENOSYS)
 100         {
 101           puts ("no aio support in this configuration");
 102           return 0;
 103         }
 104       printf ("aio_write failed: %m\n");
 105       return 1;
 106     }
 107
 108   if (wait_flag ())
 109     return 1;
 110
 111   puts ("aio_write OK");
 112
 113   flag = 0;
 114   /* Again with lio_listio.  */
 115   if (lio_listio (LIO_NOWAIT, arr, 1, &ev) < 0)
 116     {
 117       printf ("lio_listio failed: %m\n");
 118       return 1;
 119     }
 120
 121   if (wait_flag ())
 122     return 1;
 123
 124   puts ("all OK");
 125
 126   return 0;
 127 }
 128
 129 #include "../test-skeleton.c"