rt/tst-aio4.c

   1 /* Test for completion signal handling.
   2    Copyright (C) 2000, 2001 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 <signal.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25
  26 /* We might need a bit longer timeout.  */
  27 #define TIMEOUT 10 /* sec */
  28
  29 int my_signo;
  30
  31 volatile sig_atomic_t flag;
  32
  33
  34 static void
  35 sighandler (const int signo)
  36 {
  37   flag = signo;
  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_signo)
  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/aio4.XXXXXX";
  63   int fd;
  64   struct aiocb *arr[1];
  65   struct aiocb cb;
  66   static const char buf[] = "Hello World\n";
  67   struct aioinit init = {10, 20, 0};
  68   struct sigaction sa;
  69   struct sigevent ev;
  70
  71   if (SIGRTMIN == -1)
  72   {
  73       printf ("RT signals not supported.\n");
  74       return 0;
  75   }
  76
  77   /* Select a signal from the middle of the available choices... */
  78   my_signo = (SIGRTMAX + SIGRTMIN) / 2;
  79
  80   fd = mkstemp (name);
  81   if (fd == -1)
  82     {
  83       printf ("cannot open temp name: %m\n");
  84       return 1;
  85     }
  86
  87   unlink (name);
  88
  89   /* Test also aio_init.  */
  90   aio_init (&init);
  91
  92   arr[0] = &cb;
  93
  94   cb.aio_fildes = fd;
  95   cb.aio_lio_opcode = LIO_WRITE;
  96   cb.aio_reqprio = 0;
  97   cb.aio_buf = (void *) buf;
  98   cb.aio_nbytes = sizeof (buf) - 1;
  99   cb.aio_offset = 0;
 100   cb.aio_sigevent.sigev_notify = SIGEV_SIGNAL;
 101   cb.aio_sigevent.sigev_notify_function = NULL;
 102   cb.aio_sigevent.sigev_notify_attributes = NULL;
 103   cb.aio_sigevent.sigev_signo = my_signo;
 104   cb.aio_sigevent.sigev_value.sival_ptr = NULL;
 105
 106   ev.sigev_notify = SIGEV_SIGNAL;
 107   ev.sigev_notify_function = NULL;
 108   ev.sigev_notify_attributes = NULL;
 109   ev.sigev_signo = my_signo;
 110
 111   sa.sa_handler = sighandler;
 112   sigemptyset (&sa.sa_mask);
 113   sa.sa_flags = SA_RESTART;
 114
 115   if (sigaction (my_signo, &sa, NULL) < 0)
 116     {
 117       printf ("sigaction failed: %m\n");
 118       return 1;
 119     }
 120
 121   flag = 0;
 122   /* First use aio_write.  */
 123   if (aio_write (arr[0]) < 0)
 124     {
 125       printf ("aio_write failed: %m\n");
 126       return 1;
 127     }
 128
 129   if (wait_flag ())
 130     return 1;
 131
 132   puts ("aio_write OK");
 133
 134   flag = 0;
 135   /* Again with lio_listio.  */
 136   if (lio_listio (LIO_NOWAIT, arr, 1, &ev) < 0)
 137     {
 138       printf ("lio_listio failed: %m\n");
 139       return 1;
 140     }
 141
 142   if (wait_flag ())
 143     return 1;
 144
 145   puts ("all OK");
 146
 147   return 0;
 148 }
 149
 150 #include "../test-skeleton.c"