File: [local] / prex-old / usr / sample / alarm / alarm.c (download)
Revision 1.1.1.1 (vendor branch), Tue Jun 3 09:38:50 2008 UTC (16 years, 3 months ago) by nbrk
Branch: MAIN, KOHSUKE
CVS Tags: PREX_0_7_BASE, HEAD Branch point for: PREX_0_8_BASE
Changes since 1.1: +0 -0 lines
Yeah, this is an initial import of Prex, portable real-time microkernel
operating system. I wanna hack it for non-profit but fun, so let it in.
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/*
* 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 <prex/prex.h>
#include <sys/signal.h>
#include <stdio.h>
static int hz;
static int count;
static u_long start_tick;
/*
* Re-program alarm timer as count * 200msec.
*/
static void
alarm_handler(int code, void *regs)
{
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=%d time=%d msec\n", count,
(u_int)((tick - start_tick) * 1000 / hz));
}
exception_return(regs);
}
int
main(int argc, char *argv[])
{
struct info_timer info;
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);
exception_raise(task_self(), 0xfff);
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 */
for (;;);
return 0;
}