osd-contiki/platform/cooja/rtimer-arch.c

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/*
* Copyright (c) 2010, Swedish Institute of Computer Science.
* 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 Institute nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE 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 INSTITUTE 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.
*
* This file is part of the Contiki operating system.
*
* $Id: rtimer-arch.c,v 1.4 2010/03/23 13:13:17 fros4943 Exp $
*/
#include <signal.h>
#include <sys/time.h>
#include <stddef.h>
#include "sys/rtimer.h"
#include "sys/clock.h"
#include "sys/cooja_mt.h"
#include "lib/simEnvChange.h"
#define DEBUG 0
#if DEBUG
#include <stdio.h>
#define PRINTF(...) printf(__VA_ARGS__)
#else
#define PRINTF(...)
#endif
extern clock_time_t simCurrentTime;
static int pending_rtimer = 0;
static rtimer_clock_t next_rtimer = 0;
static clock_time_t last_rtimer_now = 0;
/*---------------------------------------------------------------------------*/
void
rtimer_arch_init(void)
{
next_rtimer = 0;
last_rtimer_now = 0;
pending_rtimer = 0;
}
/*---------------------------------------------------------------------------*/
void
rtimer_arch_schedule(rtimer_clock_t t)
{
next_rtimer = t;
pending_rtimer = 1;
}
/*---------------------------------------------------------------------------*/
rtimer_clock_t
rtimer_arch_next(void)
{
return next_rtimer;
}
/*---------------------------------------------------------------------------*/
int
rtimer_arch_pending(void)
{
return pending_rtimer;
}
/*---------------------------------------------------------------------------*/
int
rtimer_arch_check(void)
{
if (simCurrentTime == next_rtimer) {
/* Execute rtimer */
pending_rtimer = 0;
rtimer_run_next();
return 1;
}
return 0;
}
/*---------------------------------------------------------------------------*/
rtimer_clock_t
rtimer_arch_now(void)
{
if(last_rtimer_now == simCurrentTime) {
/* Yield to COOJA, to allow time to change */
simProcessRunValue = 1;
simNextExpirationTime = simCurrentTime + 1;
cooja_mt_yield();
}
last_rtimer_now = simCurrentTime;
return simCurrentTime;
}
/*---------------------------------------------------------------------------*/