1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
|
/********************************************************************************
* include/time.h
*
* Copyright (C) 2007-2011, 2013-2015 Gregory Nutt. All rights reserved.
* Author: Gregory Nutt <gnutt@nuttx.org>
*
* 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 NuttX 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 COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*
********************************************************************************/
#ifndef __INCLUDE_TIME_H
#define __INCLUDE_TIME_H
/********************************************************************************
* Included Files
********************************************************************************/
#include <nuttx/config.h>
#include <sys/types.h>
#include <stdint.h>
/********************************************************************************
* Pre-processor Definitions
********************************************************************************/
/* Clock tick of the system (frequency Hz).
*
* NOTE: This symbolic name CLK_TCK has been removed from the standard. It is
* replaced with CLOCKS_PER_SEC. Both are defined here.
*
* The default value is 100Hz, but this default setting can be overridden by
* defining the clock interval in microseconds as CONFIG_USEC_PER_TICK in the
* board configuration file.
*/
#ifdef CONFIG_USEC_PER_TICK
# define CLK_TCK (1000000/CONFIG_USEC_PER_TICK)
# define CLOCKS_PER_SEC (1000000/CONFIG_USEC_PER_TICK)
#else
# define CLK_TCK (100)
# define CLOCKS_PER_SEC (100)
#endif
/* CLOCK_REALTIME refers to the standard time source. For most
* implementations, the standard time source is the system timer interrupt.
* However, if the platform supports an RTC, then the standard time source
* will be the RTC for the clock_gettime() and clock_settime() interfaces
* (the system timer is still the time source for all of the interfaces).
*
* CLOCK_REALTIME represents the machine's best-guess as to the current
* wall-clock, time-of-day time. This means that CLOCK_REALTIME can jump
* forward and backward as the system time-of-day clock is changed.
*/
#define CLOCK_REALTIME 0
/* Clock that cannot be set and represents monotonic time since some
* unspecified starting point. It is not affected by changes in the
* system time-of-day clock.
*/
#ifdef CONFIG_CLOCK_MONOTONIC
# define CLOCK_MONOTONIC 1
#endif
/* This is a flag that may be passed to the timer_settime() function */
#define TIMER_ABSTIME 1
#ifndef CONFIG_LIBC_LOCALTIME
/* Local time is the same as gmtime in this implementation */
#define localtime(c) gmtime(c)
#define localtime_r(c,r) gmtime_r(c,r)
#endif
/********************************************************************************
* Public Types
********************************************************************************/
/* Scalar types */
typedef uint32_t time_t; /* Holds time in seconds */
typedef uint8_t clockid_t; /* Identifies one time base source */
typedef FAR void *timer_t; /* Represents one POSIX timer */
/* struct timespec is the standard representation of time as seconds and
* nanoseconds.
*/
struct timespec
{
time_t tv_sec; /* Seconds */
long tv_nsec; /* Nanoseconds */
};
/* struct tm is the standard representation for "broken out" time.
*
* REVISIT: This structure could be packed better using uint8_t's and
* uint16_t's. The standard definition does, however, call out type int for
* all of the members. NOTE: Any changes to this structure must be also be
* reflected in struct rtc_time defined in include/nuttx/timers/rtc.h; these two
* structures must be cast compatible.
*/
struct tm
{
int tm_sec; /* Seconds (0-61, allows for leap seconds) */
int tm_min; /* Minutes (0-59) */
int tm_hour; /* Hours (0-23) */
int tm_mday; /* Day of the month (1-31) */
int tm_mon; /* Month (0-11) */
int tm_year; /* Years since 1900 */
#if defined(CONFIG_LIBC_LOCALTIME) || defined(CONFIG_TIME_EXTENDED)
int tm_wday; /* Day of the week (0-6) */
int tm_yday; /* Day of the year (0-365) */
int tm_isdst; /* Non-0 if daylight savings time is in effect */
#endif
};
/* Struct itimerspec is used to define settings for an interval timer */
struct itimerspec
{
struct timespec it_value; /* First time */
struct timespec it_interval; /* and thereafter */
};
/* forward reference (defined in signal.h) */
struct sigevent;
/********************************************************************************
* Public Data
********************************************************************************/
#undef EXTERN
#if defined(__cplusplus)
#define EXTERN extern "C"
extern "C"
{
#else
#define EXTERN extern
#endif
/* daylight - Daylight savings time flag */
/* EXTERN int daylight; not supported */
/* timezone - Difference from UTC and local standard time */
/* EXTERN long int timezone; not supported */
/* tzname[] - Timezone strings */
/* EXTERN FAR char *tzname[]; not supported */
/********************************************************************************
* Public Function Prototypes
********************************************************************************/
clock_t clock(void);
int clock_settime(clockid_t clockid, FAR const struct timespec *tp);
int clock_gettime(clockid_t clockid, FAR struct timespec *tp);
int clock_getres(clockid_t clockid, FAR struct timespec *res);
time_t mktime(FAR struct tm *tp);
FAR struct tm *gmtime(FAR const time_t *timer);
FAR struct tm *gmtime_r(FAR const time_t *timer, FAR struct tm *result);
size_t strftime(FAR char *s, size_t max, FAR const char *format,
FAR const struct tm *tm);
time_t time(FAR time_t *tloc);
int timer_create(clockid_t clockid, FAR struct sigevent *evp,
FAR timer_t *timerid);
int timer_delete(timer_t timerid);
int timer_settime(timer_t timerid, int flags,
FAR const struct itimerspec *value,
FAR struct itimerspec *ovalue);
int timer_gettime(timer_t timerid, FAR struct itimerspec *value);
int timer_getoverrun(timer_t timerid);
int nanosleep(FAR const struct timespec *rqtp, FAR struct timespec *rmtp);
#undef EXTERN
#if defined(__cplusplus)
}
#endif
#endif /* __INCLUDE_TIME_H */
|
