| /* |
| * Copyright (c) 2006, 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. |
| * |
| */ |
| |
| /** |
| * \file |
| * Callback timer implementation |
| * \author |
| * Adam Dunkels <adam@sics.se> |
| */ |
| |
| /** |
| * \addtogroup ctimer |
| * @{ |
| */ |
| |
| #include <net/buf.h> |
| |
| #include "sys/ctimer.h" |
| #include "contiki.h" |
| #include "lib/list.h" |
| |
| LIST(ctimer_list); |
| |
| static char initialized; |
| |
| #define DEBUG DEBUG_NONE |
| #include "contiki/ip/uip-debug.h" |
| |
| #if UIP_LOGGING |
| #include <stdio.h> |
| void uip_log(char *msg); |
| #define UIP_LOG(m) uip_log(m) |
| #else |
| #define UIP_LOG(m) |
| #endif |
| |
| /*---------------------------------------------------------------------------*/ |
| PROCESS(ctimer_process, "Ctimer process"); |
| PROCESS_THREAD(ctimer_process, ev, data, buf, user_data) |
| { |
| struct ctimer *c; |
| PROCESS_BEGIN(); |
| |
| for(c = list_head(ctimer_list); c != NULL; c = c->next) { |
| etimer_set(&c->etimer, c->etimer.timer.interval, &ctimer_process); |
| } |
| initialized = 1; |
| |
| while(1) { |
| PROCESS_YIELD_UNTIL(ev == PROCESS_EVENT_TIMER); |
| for(c = list_head(ctimer_list); c != NULL; c = c->next) { |
| if(&c->etimer == data) { |
| list_remove(ctimer_list, c); |
| PROCESS_CONTEXT_BEGIN(c->p); |
| if(c->f != NULL) { |
| c->f(c->buf, c->ptr); |
| } |
| PROCESS_CONTEXT_END(c->p); |
| break; |
| } |
| } |
| } |
| PROCESS_END(); |
| } |
| /*---------------------------------------------------------------------------*/ |
| void |
| ctimer_init(void) |
| { |
| initialized = 0; |
| list_init(ctimer_list); |
| process_start(&ctimer_process, NULL, NULL); |
| } |
| /*---------------------------------------------------------------------------*/ |
| void |
| ctimer_set(struct net_buf *buf, struct ctimer *c, clock_time_t t, |
| void (*f)(struct net_buf *, void *), void *ptr) |
| { |
| c->p = &ctimer_process; |
| c->f = f; |
| c->ptr = ptr; |
| c->buf = buf; |
| PRINTF("ctimer_set %p t %u process %p buf %p etimer %p\n", |
| c, (unsigned)t, c->p, buf, &c->etimer); |
| if(initialized) { |
| PROCESS_CONTEXT_BEGIN(&ctimer_process); |
| etimer_set(&c->etimer, t, &ctimer_process); |
| PROCESS_CONTEXT_END(&ctimer_process); |
| } else { |
| c->etimer.timer.interval = t; |
| } |
| |
| list_add(ctimer_list, c); |
| } |
| /*---------------------------------------------------------------------------*/ |
| void |
| ctimer_reset(struct ctimer *c) |
| { |
| if(initialized) { |
| PROCESS_CONTEXT_BEGIN(&ctimer_process); |
| etimer_reset(&c->etimer); |
| PROCESS_CONTEXT_END(&ctimer_process); |
| } |
| |
| list_add(ctimer_list, c); |
| } |
| /*---------------------------------------------------------------------------*/ |
| void |
| ctimer_restart(struct ctimer *c) |
| { |
| if(initialized) { |
| PROCESS_CONTEXT_BEGIN(&ctimer_process); |
| etimer_restart(&c->etimer); |
| PROCESS_CONTEXT_END(&ctimer_process); |
| } |
| |
| list_add(ctimer_list, c); |
| } |
| /*---------------------------------------------------------------------------*/ |
| void |
| ctimer_stop(struct ctimer *c) |
| { |
| if(initialized) { |
| etimer_stop(&c->etimer); |
| } else { |
| c->etimer.next = NULL; |
| //c->etimer.p = PROCESS_NONE; |
| } |
| list_remove(ctimer_list, c); |
| } |
| /*---------------------------------------------------------------------------*/ |
| int |
| ctimer_expired(struct ctimer *c) |
| { |
| struct ctimer *t; |
| if(initialized) { |
| return etimer_expired(&c->etimer); |
| } |
| for(t = list_head(ctimer_list); t != NULL; t = t->next) { |
| if(t == c) { |
| return 0; |
| } |
| } |
| return 1; |
| } |
| /*---------------------------------------------------------------------------*/ |
| /** @} */ |