Contiki-NG
rtimer.c
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1 /*
2  * Copyright (c) 2005, Swedish Institute of Computer Science
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  * notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  * notice, this list of conditions and the following disclaimer in the
12  * documentation and/or other materials provided with the distribution.
13  * 3. Neither the name of the Institute nor the names of its contributors
14  * may be used to endorse or promote products derived from this software
15  * without specific prior written permission.
16  *
17  * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20  * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27  * SUCH DAMAGE.
28  *
29  * This file is part of the Contiki operating system.
30  *
31  */
32 
33 /**
34  * \file
35  * Implementation of the architecture-agnostic parts of the real-time timer module.
36  * \author
37  * Adam Dunkels <adam@sics.se>
38  *
39  */
40 
41 /**
42  * \addtogroup rt
43  * @{
44  */
45 
46 #include "sys/rtimer.h"
47 #include "contiki.h"
48 
49 #define DEBUG 0
50 #if DEBUG
51 #include <stdio.h>
52 #define PRINTF(...) printf(__VA_ARGS__)
53 #else
54 #define PRINTF(...)
55 #endif
56 
57 static struct rtimer *next_rtimer;
58 
59 /*---------------------------------------------------------------------------*/
60 void
62 {
64 }
65 /*---------------------------------------------------------------------------*/
66 int
67 rtimer_set(struct rtimer *rtimer, rtimer_clock_t time,
68  rtimer_clock_t duration,
69  rtimer_callback_t func, void *ptr)
70 {
71  int first = 0;
72 
73  PRINTF("rtimer_set time %d\n", time);
74 
75  if(next_rtimer == NULL) {
76  first = 1;
77  }
78 
79  rtimer->func = func;
80  rtimer->ptr = ptr;
81 
82  rtimer->time = time;
83  next_rtimer = rtimer;
84 
85  if(first == 1) {
87  }
88  return RTIMER_OK;
89 }
90 /*---------------------------------------------------------------------------*/
91 void
93 {
94  struct rtimer *t;
95  if(next_rtimer == NULL) {
96  return;
97  }
98  t = next_rtimer;
99  next_rtimer = NULL;
100  t->func(t, t->ptr);
101  if(next_rtimer != NULL) {
102  rtimer_arch_schedule(next_rtimer->time);
103  }
104  return;
105 }
106 /*---------------------------------------------------------------------------*/
107 
108 /** @}*/
int rtimer_set(struct rtimer *rtimer, rtimer_clock_t time, rtimer_clock_t duration, rtimer_callback_t func, void *ptr)
Post a real-time task.
Definition: rtimer.c:67
Representation of a real-time task.
Definition: rtimer.h:133
void rtimer_arch_schedule(rtimer_clock_t t)
Schedules an rtimer task to be triggered at time t.
Definition: rtimer-arch.c:71
void rtimer_arch_init(void)
We don&#39;t need to explicitly initialise anything but this routine is required by the API...
Definition: rtimer-arch.c:59
void rtimer_run_next(void)
Execute the next real-time task and schedule the next task, if any.
Definition: rtimer.c:92
Header file for the real-time timer module.
rtimer task is scheduled successfully
Definition: rtimer.h:143
void rtimer_init(void)
Initialize the real-time scheduler.
Definition: rtimer.c:61