rt/tst-aio5.c

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