Contiki-NG
clock.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  * Clock implementation for Unix.
36  * \author
37  * Adam Dunkels <adam@sics.se>
38  */
39 
40 #include "sys/clock.h"
41 #include <time.h>
42 #include <sys/time.h>
43 
44 /*---------------------------------------------------------------------------*/
45 typedef struct clock_timespec_s {
46  time_t tv_sec;
47  long tv_nsec;
48 } clock_timespec_t;
49 /*---------------------------------------------------------------------------*/
50 static void
51 get_time(clock_timespec_t *spec)
52 {
53 #if defined(__linux__) || (defined(__MACH__) && __MAC_OS_X_VERSION_MIN_REQUIRED >= 101200)
54  struct timespec ts;
55 
56  clock_gettime(CLOCK_MONOTONIC, &ts);
57 
58  spec->tv_sec = ts.tv_sec;
59  spec->tv_nsec = ts.tv_nsec;
60 #else
61  struct timeval tv;
62 
63  gettimeofday(&tv, NULL);
64 
65  spec->tv_sec = tv.tv_sec;
66  spec->tv_nsec = tv.tv_usec * 1000;
67 #endif
68 }
69 /*---------------------------------------------------------------------------*/
70 clock_time_t
72 {
73  clock_timespec_t ts;
74 
75  get_time(&ts);
76 
77  return ts.tv_sec * CLOCK_SECOND + ts.tv_nsec / (1000000000 / CLOCK_SECOND);
78 }
79 /*---------------------------------------------------------------------------*/
80 unsigned long
82 {
83  clock_timespec_t ts;
84 
85  get_time(&ts);
86 
87  return ts.tv_sec;
88 }
89 /*---------------------------------------------------------------------------*/
90 void
91 clock_delay(unsigned int d)
92 {
93  /* Does not do anything. */
94 }
95 /*---------------------------------------------------------------------------*/
96 void
98 {
99  /* Provide this function, required by main() */
100  return;
101 }
102 /*---------------------------------------------------------------------------*/
unsigned long clock_seconds(void)
Get the current value of the platform seconds.
Definition: clock.c:130
#define CLOCK_SECOND
A second, measured in system clock time.
Definition: clock.h:82
void clock_delay(unsigned int i)
Obsolete delay function but we implement it here since some code still uses it.
Definition: clock.c:164
clock_time_t clock_time(void)
Get the current clock time.
Definition: clock.c:118
void clock_init(void)
Arch-specific implementation of clock_init for the cc2538.
Definition: clock.c:93