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freebsd-skq/include/time.h
brooks 39f6c1e67a Fix C11 and POSIX 1003.1b-1993 compliance in time.h 
Only expose timespec_get in C11, C++17, or BSD code.  Always define
struct timespect if defining timespec_get.

PR:		231425
Reviewed by:	kib
Approved by:	re (gjb)
Differential Revision:	https://reviews.freebsd.org/D17174
2018-09-18 15:31:24 +00:00

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/*-
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
* (c) UNIX System Laboratories, Inc.
* All or some portions of this file are derived from material licensed
* to the University of California by American Telephone and Telegraph
* Co. or Unix System Laboratories, Inc. and are reproduced herein with
* the permission of UNIX System Laboratories, Inc.
*
* 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 University 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 REGENTS 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 REGENTS 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.
*
* @(#)time.h 8.3 (Berkeley) 1/21/94
*/
/*
* $FreeBSD$
*/
#ifndef _TIME_H_
#define _TIME_H_
#include <sys/cdefs.h>
#include <sys/_null.h>
#include <sys/_types.h>
#if __POSIX_VISIBLE > 0 && __POSIX_VISIBLE < 200112 || __BSD_VISIBLE
/*
* Frequency of the clock ticks reported by times(). Deprecated - use
* sysconf(_SC_CLK_TCK) instead. (Removed in 1003.1-2001.)
*/
#define CLK_TCK 128
#endif
/* Frequency of the clock ticks reported by clock(). */
#define CLOCKS_PER_SEC 128
#ifndef _CLOCK_T_DECLARED
typedef __clock_t clock_t;
#define _CLOCK_T_DECLARED
#endif
#ifndef _TIME_T_DECLARED
typedef __time_t time_t;
#define _TIME_T_DECLARED
#endif
#ifndef _SIZE_T_DECLARED
typedef __size_t size_t;
#define _SIZE_T_DECLARED
#endif
#if __POSIX_VISIBLE >= 199309
/*
* New in POSIX 1003.1b-1993.
*/
#ifndef _CLOCKID_T_DECLARED
typedef __clockid_t clockid_t;
#define _CLOCKID_T_DECLARED
#endif
#ifndef _TIMER_T_DECLARED
typedef __timer_t timer_t;
#define _TIMER_T_DECLARED
#endif
#include <sys/timespec.h>
#endif /* __POSIX_VISIBLE >= 199309 */
#if __POSIX_VISIBLE >= 200112
#ifndef _PID_T_DECLARED
typedef __pid_t pid_t;
#define _PID_T_DECLARED
#endif
#endif
/* These macros are also in sys/time.h. */
#if !defined(CLOCK_REALTIME) && __POSIX_VISIBLE >= 200112
#define CLOCK_REALTIME 0
#ifdef __BSD_VISIBLE
#define CLOCK_VIRTUAL 1
#define CLOCK_PROF 2
#endif
#define CLOCK_MONOTONIC 4
#define CLOCK_UPTIME 5 /* FreeBSD-specific. */
#define CLOCK_UPTIME_PRECISE 7 /* FreeBSD-specific. */
#define CLOCK_UPTIME_FAST 8 /* FreeBSD-specific. */
#define CLOCK_REALTIME_PRECISE 9 /* FreeBSD-specific. */
#define CLOCK_REALTIME_FAST 10 /* FreeBSD-specific. */
#define CLOCK_MONOTONIC_PRECISE 11 /* FreeBSD-specific. */
#define CLOCK_MONOTONIC_FAST 12 /* FreeBSD-specific. */
#define CLOCK_SECOND 13 /* FreeBSD-specific. */
#define CLOCK_THREAD_CPUTIME_ID 14
#define CLOCK_PROCESS_CPUTIME_ID 15
#endif /* !defined(CLOCK_REALTIME) && __POSIX_VISIBLE >= 200112 */
#if !defined(TIMER_ABSTIME) && __POSIX_VISIBLE >= 200112
#if __BSD_VISIBLE
#define TIMER_RELTIME 0x0 /* relative timer */
#endif
#define TIMER_ABSTIME 0x1 /* absolute timer */
#endif /* !defined(TIMER_ABSTIME) && __POSIX_VISIBLE >= 200112 */
struct tm {
int tm_sec; /* seconds after the minute [0-60] */
int tm_min; /* minutes after the hour [0-59] */
int tm_hour; /* hours since midnight [0-23] */
int tm_mday; /* day of the month [1-31] */
int tm_mon; /* months since January [0-11] */
int tm_year; /* years since 1900 */
int tm_wday; /* days since Sunday [0-6] */
int tm_yday; /* days since January 1 [0-365] */
int tm_isdst; /* Daylight Savings Time flag */
long tm_gmtoff; /* offset from UTC in seconds */
char *tm_zone; /* timezone abbreviation */
};
#if __POSIX_VISIBLE
extern char *tzname[];
#endif
__BEGIN_DECLS
char *asctime(const struct tm *);
clock_t clock(void);
char *ctime(const time_t *);
#ifndef _STANDALONE
double difftime(time_t, time_t);
#endif
/* XXX missing: getdate() */
struct tm *gmtime(const time_t *);
struct tm *localtime(const time_t *);
time_t mktime(struct tm *);
size_t strftime(char * __restrict, size_t, const char * __restrict,
const struct tm * __restrict);
time_t time(time_t *);
#if __POSIX_VISIBLE >= 200112
struct sigevent;
int timer_create(clockid_t, struct sigevent *__restrict, timer_t *__restrict);
int timer_delete(timer_t);
int timer_gettime(timer_t, struct itimerspec *);
int timer_getoverrun(timer_t);
int timer_settime(timer_t, int, const struct itimerspec *__restrict,
struct itimerspec *__restrict);
#endif
#if __POSIX_VISIBLE
void tzset(void);
#endif
#if __POSIX_VISIBLE >= 199309
int clock_getres(clockid_t, struct timespec *);
int clock_gettime(clockid_t, struct timespec *);
int clock_settime(clockid_t, const struct timespec *);
int nanosleep(const struct timespec *, struct timespec *);
#endif /* __POSIX_VISIBLE >= 199309 */
#if __POSIX_VISIBLE >= 200112
int clock_getcpuclockid(pid_t, clockid_t *);
int clock_nanosleep(clockid_t, int, const struct timespec *, struct timespec *);
#endif
#if __POSIX_VISIBLE >= 199506
char *asctime_r(const struct tm *, char *);
char *ctime_r(const time_t *, char *);
struct tm *gmtime_r(const time_t *, struct tm *);
struct tm *localtime_r(const time_t *, struct tm *);
#endif
#if __XSI_VISIBLE
char *strptime(const char * __restrict, const char * __restrict,
struct tm * __restrict);
#endif
#if __BSD_VISIBLE
char *timezone(int, int); /* XXX XSI conflict */
void tzsetwall(void);
time_t timelocal(struct tm * const);
time_t timegm(struct tm * const);
int timer_oshandle_np(timer_t timerid);
time_t time2posix(time_t t);
time_t posix2time(time_t t);
#endif /* __BSD_VISIBLE */
#if __POSIX_VISIBLE >= 200809 || defined(_XLOCALE_H_)
#include <xlocale/_time.h>
#endif
#if defined(__BSD_VISIBLE) || __ISO_C_VISIBLE >= 2011 || \
(defined(cplusplus) && cplusplus >= 201703)
#include <sys/_timespec.h>
/* ISO/IEC 9899:201x 7.27.2.5 The timespec_get function */
#define TIME_UTC 1 /* time elapsed since epoch */
int timespec_get(struct timespec *ts, int base);
#endif
__END_DECLS
#endif /* !_TIME_H_ */
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