Colony » Colony Scout

/*

 * Copyright (c) 2005-2007, Kohsuke Ohtani

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. 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.

 * 3. Neither the name of the author nor the names of any co-contributors

 *    may be used to endorse or promote products derived from this software

 *    without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``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 OR CONTRIBUTORS 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.

 */

/*

 * alarm.c - sample alarm program.

 */

/*

 * Expected output:

 *

 * Alarm sample program

 * Start alarm timer

 * Ring! count=1 time=1000 msec

 * Ring! count=2 time=1200 msec

 * Ring! count=3 time=1600 msec

 * Ring! count=4 time=2200 msec

 * Ring! count=5 time=3000 msec

 * Ring! count=6 time=4000 msec

 * Ring! count=7 time=5200 msec

 * Ring! count=8 time=6600 msec

 * Ring! count=9 time=8200 msec

 * Ring! count=10 time=10000 msec

 * End...

 *

 */

#include <sys/prex.h>

#include <sys/signal.h>

#include <stdio.h>

static int hz;

static volatile u_long count;

static u_long start_tick;

/*

 * Re-program alarm timer as count * 200msec.

 */

static void

alarm_handler(int code)

{

        u_long tick;

        if (code == SIGALRM) {

                count++;

                if (count > 10) {

                        printf("End...\n");

                        task_terminate(task_self());

                }

                timer_alarm(count * 200, 0);

                sys_time(&tick);

                printf("Ring! count=%ld time=%d msec\n", count,

                       (u_int)((tick - start_tick) * 1000 / hz));

        }

        exception_return();

}

int

main(int argc, char *argv[])

{

        struct timerinfo info;

        int code;

        printf("Alarm sample program\n");

        sys_info(INFO_TIMER, &info);

        if (info.hz == 0)

                panic("can not get timer tick rate");

        hz = info.hz;

        /*

         * Install alarm handler

         */

        exception_setup(alarm_handler);

        timer_sleep(2000, 0);

        /*

         * Kick first alarm timer.

         */

        printf("Start alarm timer\n");

        count = 0;

        sys_time(&start_tick);

        timer_alarm(1000, 0);

        /* Wait alarm */

        while (count < 10) {

                exception_wait(&code);

        }

        printf("Test completed...\n");

        return 0;

}