Contiki 2.6

clock.c

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00001 /*
00002  * Copyright (c) 2005, 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: clock.c,v 1.2 2008/07/10 17:10:39 adamdunkels Exp $
00032  */
00033 
00034 /**
00035  * \file
00036  *         Clock implementation for Unix.
00037  * \author
00038  *         Adam Dunkels <adam@sics.se>
00039  */
00040 
00041 #include "sys/clock.h"
00042 #include <stdlib.h>
00043 #include <sys/time.h>
00044 
00045 static long startsecs=0,startmsecs=0;
00046 /*---------------------------------------------------------------------------*/
00047 void
00048 clock_init(void)
00049 {
00050   struct timeval tv;
00051   gettimeofday(&tv, NULL) ;
00052   startmsecs=tv.tv_usec/1000;
00053   startsecs=tv.tv_sec;
00054 }
00055 /*---------------------------------------------------------------------------*/
00056 clock_time_t
00057 clock_time(void)
00058 {
00059   struct timeval tv;
00060   struct timezone tz;
00061    
00062   gettimeofday(&tv, &tz);
00063  
00064   return tv.tv_sec * 1000 + tv.tv_usec / 1000;
00065 }
00066 /*---------------------------------------------------------------------------*/
00067 unsigned long
00068 clock_seconds(void)
00069 {
00070 /* Returne seconds since startup */
00071   long secs,msecs;
00072   struct timeval tv;
00073   gettimeofday(&tv, NULL) ;
00074   msecs=tv.tv_usec/1000;
00075   secs=tv.tv_sec;
00076   secs -=startsecs;
00077   msecs-=startmsecs;
00078   if (msecs<0) secs--;
00079   return secs;
00080 }
00081 #if 0
00082  /* Return seconds since midnight*/
00083   struct timeval tv;
00084   struct timezone tz;
00085    
00086   gettimeofday(&tv, &tz);
00087  
00088   return tv.tv_sec;
00089 }
00090 #endif
00091 /*---------------------------------------------------------------------------*/
00092 void
00093 clock_delay(unsigned int d)
00094 {
00095   /* Does not do anything. */
00096 }
00097 /*---------------------------------------------------------------------------*/