92 lines
3 KiB
C
92 lines
3 KiB
C
/*
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* Copyright (c) 2007, Swedish Institute of Computer Science.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* This file is part of the Contiki operating system.
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*
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* $Id: rt-arch.c,v 1.1 2007/03/19 00:26:54 adamdunkels Exp $
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*/
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/**
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* \file
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* Native (non-specific) code for the Contiki real-time module rt
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include <signal.h>
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#include <sys/time.h>
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#include "sys/rt.h"
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#include "sys/clock.h"
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#define DEBUG 0
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#if DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/*---------------------------------------------------------------------------*/
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static void
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interrupt(int sig)
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{
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signal(sig, interrupt);
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rt_task_run();
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}
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/*---------------------------------------------------------------------------*/
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void
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rt_arch_init(void)
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{
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signal(SIGALRM, interrupt);
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}
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/*---------------------------------------------------------------------------*/
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void
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rt_arch_schedule(rt_clock_t t)
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{
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struct itimerval val;
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rt_clock_t c;
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c = t - (unsigned short)clock_time();
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val.it_value.tv_sec = c / 1000;
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val.it_value.tv_usec = (c % 1000) * 1000;
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PRINTF("rt_arch_schedule time %u %u in %d.%d seconds\n", t, c, c / 1000,
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(c % 1000) * 1000);
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val.it_interval.tv_sec = val.it_interval.tv_usec = 0;
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setitimer(ITIMER_REAL, &val, NULL);
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}
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/*---------------------------------------------------------------------------*/
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rt_clock_t
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rt_arch_now(void)
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{
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return clock_time();
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}
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/*---------------------------------------------------------------------------*/
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