HelenOS sources

root/uspace/app/tester/ipc/starve.c

DEFINITIONS

1. test_starve_ipc

/*
 * Copyright (c) 2012 Vojtech Horky
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 * - The name of the author may not be used to endorse or promote products
 *   derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <io/console.h>
#include <async.h>
#include "../tester.h"

#define DURATION_SECS      30

const char *test_starve_ipc(void)
{
        const char *err = NULL;
        console_ctrl_t *console = console_init(stdin, stdout);
        if (console == NULL)
                return "Failed to init connection with console.";

        struct timespec start;
        getuptime(&start);

        TPRINTF("Intensive computation shall be imagined (for %ds)...\n", DURATION_SECS);
        TPRINTF("Press a key to terminate prematurely...\n");
        while (true) {
                struct timespec now;
                getuptime(&now);

                if (NSEC2SEC(ts_sub_diff(&now, &start)) >= DURATION_SECS)
                        break;

                cons_event_t ev;
                usec_t timeout = 0;
                errno_t rc = console_get_event_timeout(console, &ev, &timeout);
                if (rc == EOK) {
                        if (ev.type == CEV_KEY && ev.ev.key.type == KEY_PRESS) {
                                TPRINTF("Key %d pressed, terminating.\n", ev.ev.key.key);
                                break;
                        }
                } else if (rc != ETIMEOUT) {
                        TPRINTF("Got rc=%d, terminating.\n", rc);
                        break;
                }
        }

        // FIXME - unless a key was pressed, the answer leaked as no one
        // will wait for it.
        // We cannot use async_forget() directly, though. Something like
        // console_forget_pending_kbd_event() shall come here.

        TPRINTF("Terminating...\n");

        console_done(console);

        return err;
}