Contiki 2.6

timetable.c

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00001 /*
00002  * Copyright (c) 2008, Swedish Institute of Computer Science.
00003  * All rights reserved.
00004  *
00005  * Redistribution and use in source and binary forms, with or without
00006  * modification, are permitted provided that the following conditions
00007  * are met:
00008  * 1. Redistributions of source code must retain the above copyright
00009  *    notice, this list of conditions and the following disclaimer.
00010  * 2. Redistributions in binary form must reproduce the above copyright
00011  *    notice, this list of conditions and the following disclaimer in the
00012  *    documentation and/or other materials provided with the distribution.
00013  * 3. Neither the name of the Institute nor the names of its contributors
00014  *    may be used to endorse or promote products derived from this software
00015  *    without specific prior written permission.
00016  *
00017  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
00018  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
00019  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
00020  * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
00021  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
00022  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
00023  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
00024  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
00025  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
00026  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
00027  * SUCH DAMAGE.
00028  *
00029  * This file is part of the Contiki operating system.
00030  *
00031  * $Id: timetable.c,v 1.4 2010/04/06 19:10:21 anthony-a Exp $
00032  */
00033 
00034 /**
00035  * \file
00036  *         Implementation of timetable, a data structure containing timestamps for events
00037  * \author
00038  *         Adam Dunkels <adam@sics.se>
00039  */
00040 #include "sys/clock.h"
00041 #include "sys/timetable.h"
00042 
00043 #include <stdio.h>
00044 
00045 rtimer_clock_t timetable_timestamp_time;
00046 
00047 
00048 /*---------------------------------------------------------------------------*/
00049 struct timetable_timestamp *
00050 timetable_entry(struct timetable *t, int num)
00051 {
00052   if(t == NULL) {
00053     return NULL;
00054   }
00055   return &(t->timestamps[num]);
00056 }
00057 /*---------------------------------------------------------------------------*/
00058 int
00059 timetable_ptr(struct timetable *t)
00060 {
00061   return *t->ptr;
00062 }
00063 /*---------------------------------------------------------------------------*/
00064 void
00065 timetable_clear(struct timetable *t)
00066 {
00067   *t->ptr = 0;
00068 }
00069 /*---------------------------------------------------------------------------*/
00070 rtimer_clock_t
00071 timetable_timediff(struct timetable *t,
00072                    const char *id1, const char *id2)
00073 {
00074 #ifdef SDCC_mcs51
00075   char i; /* SDCC tracker 2982753 */
00076 #else
00077   int i;
00078 #endif
00079   int t1, t2;
00080   
00081   t1 = t2 = t->size;
00082   
00083   for(i = *t->ptr - 1; i >= 0; --i) {
00084     if(t->timestamps[i].id == id1) {
00085       t1 = i;
00086       break;
00087     }
00088   }
00089   
00090   for(i = i - 1; i >= 0; --i) {
00091     if(t->timestamps[i].id == id2) {
00092       t2 = i;
00093       break;
00094     }
00095   }
00096   if(t1 != t->size && t2 != t->size) {
00097     return t->timestamps[t1].time - t->timestamps[t2].time;
00098   }
00099   
00100   return 0;
00101 }
00102 /*---------------------------------------------------------------------------*/
00103 void
00104 timetable_init(void)
00105 {
00106   char dummy1, dummy2;
00107 #define temp_size 4
00108   TIMETABLE_STATIC(temp);
00109   
00110   timetable_clear(&temp);
00111 
00112   /* Measure the time for taking a timestamp. */
00113   TIMETABLE_TIMESTAMP(temp, &dummy1);
00114   TIMETABLE_TIMESTAMP(temp, &dummy2);
00115   timetable_timestamp_time = timetable_timediff(&temp, &dummy1, &dummy2);
00116 }
00117 /*---------------------------------------------------------------------------*/
00118 void
00119 timetable_print(struct timetable *t)
00120 {
00121   unsigned int i;
00122   int time;
00123   
00124   time = t->timestamps[0].time;
00125 
00126   printf("---\n");
00127   for(i = 1; i < *t->ptr; ++i) {
00128     printf("%s: %u\n", t->timestamps[i - 1].id, t->timestamps[i].time - time);
00129     time = t->timestamps[i].time;
00130   }
00131 }
00132 /*---------------------------------------------------------------------------*/