146 lines
4.1 KiB
C
146 lines
4.1 KiB
C
/**
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* \addtogroup ctimer
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* @{
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*/
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/*
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* Copyright (c) 2006, Swedish Institute of Computer Science.
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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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* This file is part of the Contiki operating system.
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*
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* $Id: ctimer.c,v 1.5 2007/11/13 15:13:03 nifi Exp $
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*/
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/**
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* \file
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* Callback timer implementation
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* \author
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* Adam Dunkels <adam@sics.se>
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*/
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#include "net/rime/ctimer.h"
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#include "contiki.h"
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#include "lib/list.h"
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#include "net/rime.h"
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LIST(ctimer_list);
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static char initialized;
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#define DEBUG 0
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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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/*---------------------------------------------------------------------------*/
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PROCESS(ctimer_process, "ctimer process");
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PROCESS_THREAD(ctimer_process, ev, data)
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{
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struct ctimer *c;
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PROCESS_BEGIN();
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for(c = list_head(ctimer_list); c != NULL; c = c->next) {
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etimer_set(&c->etimer, c->etimer.timer.interval);
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}
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initialized = 1;
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while(1) {
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PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_TIMER);
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for(c = list_head(ctimer_list); c != NULL; c = c->next) {
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if(&c->etimer == data) {
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list_remove(ctimer_list, c);
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PROCESS_CONTEXT_BEGIN(c->p);
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if(c->f != NULL) {
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c->f(c->ptr);
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}
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PROCESS_CONTEXT_END(c->p);
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break;
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}
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}
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}
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PROCESS_END();
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}
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/*---------------------------------------------------------------------------*/
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void
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ctimer_init(void)
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{
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initialized = 0;
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list_init(ctimer_list);
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process_start(&ctimer_process, NULL);
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}
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/*---------------------------------------------------------------------------*/
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void
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ctimer_set(struct ctimer *c, clock_time_t t,
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void (*f)(void *), void *ptr)
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{
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PRINTF("ctimer_set %p %d\n", c, t);
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c->p = PROCESS_CURRENT();
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c->f = f;
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c->ptr = ptr;
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if(initialized) {
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PROCESS_CONTEXT_BEGIN(&ctimer_process);
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etimer_set(&c->etimer, t);
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PROCESS_CONTEXT_END(&ctimer_process);
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} else {
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c->etimer.timer.interval = t;
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}
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list_remove(ctimer_list, c);
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list_add(ctimer_list, c);
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}
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/*---------------------------------------------------------------------------*/
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void
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ctimer_reset(struct ctimer *c)
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{
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if(initialized) {
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PROCESS_CONTEXT_BEGIN(&ctimer_process);
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etimer_reset(&c->etimer);
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PROCESS_CONTEXT_END(&ctimer_process);
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}
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list_remove(ctimer_list, c);
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list_add(ctimer_list, c);
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}
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/*---------------------------------------------------------------------------*/
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void
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ctimer_stop(struct ctimer *c)
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{
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if(initialized) {
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etimer_stop(&c->etimer);
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} else {
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c->etimer.next = NULL;
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c->etimer.p = PROCESS_NONE;
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}
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list_remove(ctimer_list, c);
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}
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/*---------------------------------------------------------------------------*/
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/** @} */
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