107 lines
3.4 KiB
C
107 lines
3.4 KiB
C
/*
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* Copyright (c) 2016, SICS, Swedish ICT AB.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the Institute nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/**
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* \file
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* Example posix implementation of CoAP timer driver.
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* \author
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* Niclas Finne <nfi@sics.se>
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* Joakim Eriksson <joakime@sics.se>
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*/
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#include "coap-timer.h"
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#include <sys/time.h>
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#define DEBUG 1
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#if DEBUG
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#include <stdio.h>
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#define PRINTF(...) printf(__VA_ARGS__)
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#else
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#define PRINTF(...)
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#endif
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/* The maximal time allowed to move forward between updates */
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#define MAX_TIME_CHANGE_MSEC 360000UL
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static uint64_t uptime_msec = 0;
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static uint64_t last_msec;
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/*---------------------------------------------------------------------------*/
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static uint64_t
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uptime(void)
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{
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struct timeval tv;
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uint64_t t;
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if(gettimeofday(&tv, NULL)) {
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PRINTF("*** failed to retrieve system time\n");
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return last_msec;
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}
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t = tv.tv_sec * (uint64_t)1000;
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t += tv.tv_usec / (uint64_t)1000;
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if(last_msec == 0) {
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/* No update first time */
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} else if(t < last_msec) {
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/* System time has moved backwards */
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PRINTF("*** system time has moved backwards %lu msec\n",
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(unsigned long)(last_msec - t));
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} else if(t - last_msec > MAX_TIME_CHANGE_MSEC) {
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/* Too large jump forward in system time */
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PRINTF("*** system time has moved forward %lu msec\n",
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(unsigned long)(t - last_msec));
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uptime_msec += 1000UL;
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} else {
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uptime_msec += t - last_msec;
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}
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last_msec = t;
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return uptime_msec;
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}
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/*---------------------------------------------------------------------------*/
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static void
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init(void)
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{
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uptime();
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}
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/*---------------------------------------------------------------------------*/
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static void
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update(void)
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{
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}
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/*---------------------------------------------------------------------------*/
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const coap_timer_driver_t coap_timer_native_driver = {
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.init = init,
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.uptime = uptime,
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.update = update,
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};
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/*---------------------------------------------------------------------------*/
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