contiki/core/sys/timetable.c

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/*
* Copyright (c) 2008, 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.
*
2009-09-09 21:10:35 +00:00
* $Id: timetable.c,v 1.3 2009/09/09 21:10:35 adamdunkels Exp $
*/
/**
* \file
2009-09-09 21:10:35 +00:00
* Implementation of timetable, a data structure containing timestamps for events
* \author
* Adam Dunkels <adam@sics.se>
*/
2009-09-09 21:10:35 +00:00
#include "sys/clock.h"
#include "sys/timetable.h"
#include <stdio.h>
rtimer_clock_t timetable_timestamp_time;
/*---------------------------------------------------------------------------*/
struct timetable_timestamp *
timetable_entry(struct timetable *t, int num)
{
if(t == NULL) {
return NULL;
}
return &(t->timestamps[num]);
}
/*---------------------------------------------------------------------------*/
int
timetable_ptr(struct timetable *t)
{
return *t->ptr;
}
/*---------------------------------------------------------------------------*/
void
timetable_clear(struct timetable *t)
{
*t->ptr = 0;
}
/*---------------------------------------------------------------------------*/
rtimer_clock_t
timetable_timediff(struct timetable *t,
const char *id1, const char *id2)
{
int i;
int t1, t2;
t1 = t2 = t->size;
for(i = *t->ptr - 1; i >= 0; --i) {
if(t->timestamps[i].id == id1) {
t1 = i;
break;
}
}
for(i = i - 1; i >= 0; --i) {
if(t->timestamps[i].id == id2) {
t2 = i;
break;
}
}
if(t1 != t->size && t2 != t->size) {
return t->timestamps[t1].time - t->timestamps[t2].time;
}
return 0;
}
/*---------------------------------------------------------------------------*/
void
timetable_init(void)
{
char dummy1, dummy2;
#define temp_size 4
TIMETABLE_STATIC(temp);
timetable_clear(&temp);
/* Measure the time for taking a timestamp. */
TIMETABLE_TIMESTAMP(temp, &dummy1);
TIMETABLE_TIMESTAMP(temp, &dummy2);
timetable_timestamp_time = timetable_timediff(&temp, &dummy1, &dummy2);
}
/*---------------------------------------------------------------------------*/
void
timetable_print(struct timetable *t)
{
int i;
int time;
time = t->timestamps[0].time;
printf("---\n");
for(i = 1; i < *t->ptr; ++i) {
printf("%s: %u\n", t->timestamps[i - 1].id, t->timestamps[i].time - time);
time = t->timestamps[i].time;
}
}
/*---------------------------------------------------------------------------*/