uspace/app/tester/ipc/starve.c

   1 /*
   2  * Copyright (c) 2012 Vojtech Horky
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  *
   9  * - Redistributions of source code must retain the above copyright
  10  *   notice, this list of conditions and the following disclaimer.
  11  * - Redistributions in binary form must reproduce the above copyright
  12  *   notice, this list of conditions and the following disclaimer in the
  13  *   documentation and/or other materials provided with the distribution.
  14  * - The name of the author may not be used to endorse or promote products
  15  *   derived from this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  27  */
  28
  29 #include <stdio.h>
  30 #include <stdlib.h>
  31 #include <time.h>
  32 #include <io/console.h>
  33 #include <async.h>
  34 #include "../tester.h"
  35
  36 #define DURATION_SECS      30
  37
  38 const char *test_starve_ipc(void)
  39 {
  40         const char *err = NULL;
  41         console_ctrl_t *console = console_init(stdin, stdout);
  42         if (console == NULL)
  43                 return "Failed to init connection with console.";
  44
  45         struct timespec start;
  46         getuptime(&start);
  47
  48         TPRINTF("Intensive computation shall be imagined (for %ds)...\n", DURATION_SECS);
  49         TPRINTF("Press a key to terminate prematurely...\n");
  50         while (true) {
  51                 struct timespec now;
  52                 getuptime(&now);
  53
  54                 if (NSEC2SEC(ts_sub_diff(&now, &start)) >= DURATION_SECS)
  55                         break;
  56
  57                 cons_event_t ev;
  58                 usec_t timeout = 0;
  59                 bool has_event = console_get_event_timeout(console, &ev, &timeout);
  60                 if (has_event && ev.type == CEV_KEY && ev.ev.key.type == KEY_PRESS) {
  61                         TPRINTF("Key %d pressed, terminating.\n", ev.ev.key.key);
  62                         break;
  63                 }
  64         }
  65
  66         // FIXME - unless a key was pressed, the answer leaked as no one
  67         // will wait for it.
  68         // We cannot use async_forget() directly, though. Something like
  69         // console_forget_pending_kbd_event() shall come here.
  70
  71         TPRINTF("Terminating...\n");
  72
  73         console_done(console);
  74
  75         return err;
  76 }