238 lines
8.0 KiB
C
238 lines
8.0 KiB
C
/********************************************************************************
|
|
* 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
|
|
|
|
#ifdef CONFIG_LIBC_LOCALTIME
|
|
|
|
/* 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
|
|
* Setup by tzset()
|
|
*/
|
|
|
|
EXTERN FAR char *tzname[2];
|
|
#endif
|
|
|
|
/********************************************************************************
|
|
* 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 *timep);
|
|
FAR struct tm *gmtime_r(FAR const time_t *timep, FAR struct tm *result);
|
|
|
|
#ifdef CONFIG_LIBC_LOCALTIME
|
|
FAR struct tm *localtime(FAR const time_t *timep);
|
|
FAR struct tm *localtime_r(FAR const time_t *timep, FAR struct tm *result);
|
|
#endif
|
|
|
|
size_t strftime(FAR char *s, size_t max, FAR const char *format,
|
|
FAR const struct tm *tm);
|
|
|
|
#ifdef CONFIG_TIME_EXTENDED
|
|
FAR char *asctime(FAR const struct tm *tp);
|
|
FAR char *asctime_r(FAR const struct tm *tp, FAR char *buf);
|
|
FAR char *ctime(FAR const time_t *timep);
|
|
FAR char *ctime_r(FAR const time_t *timep, FAR char *buf);
|
|
#endif
|
|
|
|
time_t time(FAR time_t *timep);
|
|
|
|
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);
|
|
|
|
#ifdef CONFIG_LIBC_LOCALTIME
|
|
void tzset(void);
|
|
#endif
|
|
|
|
#undef EXTERN
|
|
#if defined(__cplusplus)
|
|
}
|
|
#endif
|
|
|
|
#endif /* __INCLUDE_TIME_H */
|