contiki/cpu/6502/sys/clock.c
Oliver Schmidt ca2552461e Adjusted retro target clock to "new" DNS resolver.
The DNS resolver requires 1/4 sec clock resolution. The retro targets had a 1/2 sec clock resolution (optimized for the 1/2 sec TCP timer) resulting in DNS resolver timeouts being 0. Therefore the retro target clock resolution is now increased to 1/4 sec.
2015-08-04 13:48:08 +02:00

59 lines
2.5 KiB
C

/*
* Copyright (c) 2007, 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.
*
* Author: Oliver Schmidt <ol.sc@web.de>
*
*/
#include <time.h>
#include "contiki.h"
/*---------------------------------------------------------------------------*/
clock_time_t
clock_time(void)
{
/* Contiki contains quite some calculations based on clock_time_t so we want
* to avoid defining clock_time_t to be 32 bit because that would mean a lot
* of overhead for cc65 targets.
* On the other hand we want to avoid wrapping around frequently so the idea
* is to reduce the clock resolution to the bare minimum. This is defined by
* the DNS resolver using a 1/4 second timer. So CLOCK_CONF_SECOND needs to
* be defined at least as 4. */
return clock() / (CLK_TCK / CLOCK_CONF_SECOND);
}
/*---------------------------------------------------------------------------*/
unsigned long
clock_seconds(void)
{
return clock() / CLK_TCK;
}
/*---------------------------------------------------------------------------*/