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virtualbox/include/iprt/time.h
Daniel Baumann df1bda4fe9
Adding upstream version 7.0.20-dfsg. 
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
2025-06-22 09:56:04 +02:00

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/** @file
* IPRT - Time.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation, in version 3 of the
* License.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
#ifndef IPRT_INCLUDED_time_h
#define IPRT_INCLUDED_time_h
#ifndef RT_WITHOUT_PRAGMA_ONCE
# pragma once
#endif
#include <iprt/cdefs.h>
#include <iprt/types.h>
#include <iprt/assertcompile.h>
RT_C_DECLS_BEGIN
/** @defgroup grp_rt_time RTTime - Time
* @ingroup grp_rt
* @{
*/
/** Time Specification.
*
* Use the inline RTTimeSpecGet/Set to operate on structure this so we
* can easily change the representation if required later.
*
* The current representation is in nanoseconds relative to the unix epoch
* (1970-01-01 00:00:00 UTC). This gives us an approximate span from
* 1678 to 2262 without sacrificing the resolution offered by the various
* host OSes (BSD & LINUX 1ns, NT 100ns).
*/
typedef struct RTTIMESPEC
{
/** Nanoseconds since epoch.
* The name is intentially too long to be comfortable to use because you should be
* using inline helpers! */
int64_t i64NanosecondsRelativeToUnixEpoch;
} RTTIMESPEC;
/** @name RTTIMESPEC methods
* @{ */
/**
* Gets the time as nanoseconds relative to the unix epoch.
*
* @returns Nanoseconds relative to unix epoch.
* @param pTime The time spec to interpret.
*/
DECLINLINE(int64_t) RTTimeSpecGetNano(PCRTTIMESPEC pTime)
{
return pTime->i64NanosecondsRelativeToUnixEpoch;
}
/**
* Sets the time give by nanoseconds relative to the unix epoch.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Nano The new time in nanoseconds.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSetNano(PRTTIMESPEC pTime, int64_t i64Nano)
{
pTime->i64NanosecondsRelativeToUnixEpoch = i64Nano;
return pTime;
}
/**
* Gets the time as microseconds relative to the unix epoch.
*
* @returns microseconds relative to unix epoch.
* @param pTime The time spec to interpret.
*/
DECLINLINE(int64_t) RTTimeSpecGetMicro(PCRTTIMESPEC pTime)
{
return pTime->i64NanosecondsRelativeToUnixEpoch / RT_NS_1US;
}
/**
* Sets the time given by microseconds relative to the unix epoch.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Micro The new time in microsecond.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSetMicro(PRTTIMESPEC pTime, int64_t i64Micro)
{
pTime->i64NanosecondsRelativeToUnixEpoch = i64Micro * RT_NS_1US;
return pTime;
}
/**
* Gets the time as milliseconds relative to the unix epoch.
*
* @returns milliseconds relative to unix epoch.
* @param pTime The time spec to interpret.
*/
DECLINLINE(int64_t) RTTimeSpecGetMilli(PCRTTIMESPEC pTime)
{
return pTime->i64NanosecondsRelativeToUnixEpoch / RT_NS_1MS;
}
/**
* Sets the time given by milliseconds relative to the unix epoch.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Milli The new time in milliseconds.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSetMilli(PRTTIMESPEC pTime, int64_t i64Milli)
{
pTime->i64NanosecondsRelativeToUnixEpoch = i64Milli * RT_NS_1MS;
return pTime;
}
/**
* Gets the time as seconds relative to the unix epoch.
*
* @returns seconds relative to unix epoch.
* @param pTime The time spec to interpret.
*/
DECLINLINE(int64_t) RTTimeSpecGetSeconds(PCRTTIMESPEC pTime)
{
return pTime->i64NanosecondsRelativeToUnixEpoch / RT_NS_1SEC;
}
/**
* Sets the time given by seconds relative to the unix epoch.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Seconds The new time in seconds.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSetSeconds(PRTTIMESPEC pTime, int64_t i64Seconds)
{
pTime->i64NanosecondsRelativeToUnixEpoch = i64Seconds * RT_NS_1SEC;
return pTime;
}
/**
* Makes the time spec absolute like abs() does (i.e. a positive value).
*
* @returns pTime.
* @param pTime The time spec to modify.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecAbsolute(PRTTIMESPEC pTime)
{
if (pTime->i64NanosecondsRelativeToUnixEpoch < 0)
pTime->i64NanosecondsRelativeToUnixEpoch = -pTime->i64NanosecondsRelativeToUnixEpoch;
return pTime;
}
/**
* Negates the time.
*
* @returns pTime.
* @param pTime The time spec to modify.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecNegate(PRTTIMESPEC pTime)
{
pTime->i64NanosecondsRelativeToUnixEpoch = -pTime->i64NanosecondsRelativeToUnixEpoch;
return pTime;
}
/**
* Adds a time period to the time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param pTimeAdd The time spec to add to pTime.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecAdd(PRTTIMESPEC pTime, PCRTTIMESPEC pTimeAdd)
{
pTime->i64NanosecondsRelativeToUnixEpoch += pTimeAdd->i64NanosecondsRelativeToUnixEpoch;
return pTime;
}
/**
* Adds a time period give as nanoseconds from the time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Nano The time period in nanoseconds.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecAddNano(PRTTIMESPEC pTime, int64_t i64Nano)
{
pTime->i64NanosecondsRelativeToUnixEpoch += i64Nano;
return pTime;
}
/**
* Adds a time period give as microseconds from the time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Micro The time period in microseconds.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecAddMicro(PRTTIMESPEC pTime, int64_t i64Micro)
{
pTime->i64NanosecondsRelativeToUnixEpoch += i64Micro * RT_NS_1US;
return pTime;
}
/**
* Adds a time period give as milliseconds from the time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Milli The time period in milliseconds.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecAddMilli(PRTTIMESPEC pTime, int64_t i64Milli)
{
pTime->i64NanosecondsRelativeToUnixEpoch += i64Milli * RT_NS_1MS;
return pTime;
}
/**
* Adds a time period give as seconds from the time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Seconds The time period in seconds.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecAddSeconds(PRTTIMESPEC pTime, int64_t i64Seconds)
{
pTime->i64NanosecondsRelativeToUnixEpoch += i64Seconds * RT_NS_1SEC;
return pTime;
}
/**
* Subtracts a time period from the time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param pTimeSub The time spec to subtract from pTime.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSub(PRTTIMESPEC pTime, PCRTTIMESPEC pTimeSub)
{
pTime->i64NanosecondsRelativeToUnixEpoch -= pTimeSub->i64NanosecondsRelativeToUnixEpoch;
return pTime;
}
/**
* Subtracts a time period give as nanoseconds from the time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Nano The time period in nanoseconds.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSubNano(PRTTIMESPEC pTime, int64_t i64Nano)
{
pTime->i64NanosecondsRelativeToUnixEpoch -= i64Nano;
return pTime;
}
/**
* Subtracts a time period give as microseconds from the time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Micro The time period in microseconds.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSubMicro(PRTTIMESPEC pTime, int64_t i64Micro)
{
pTime->i64NanosecondsRelativeToUnixEpoch -= i64Micro * RT_NS_1US;
return pTime;
}
/**
* Subtracts a time period give as milliseconds from the time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Milli The time period in milliseconds.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSubMilli(PRTTIMESPEC pTime, int64_t i64Milli)
{
pTime->i64NanosecondsRelativeToUnixEpoch -= i64Milli * RT_NS_1MS;
return pTime;
}
/**
* Subtracts a time period give as seconds from the time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Seconds The time period in seconds.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSubSeconds(PRTTIMESPEC pTime, int64_t i64Seconds)
{
pTime->i64NanosecondsRelativeToUnixEpoch -= i64Seconds * RT_NS_1SEC;
return pTime;
}
/**
* Gives the time in seconds and nanoseconds.
*
* @param pTime The time spec to interpret.
* @param *pi32Seconds Where to store the time period in seconds.
* @param *pi32Nano Where to store the time period in nanoseconds.
*/
DECLINLINE(void) RTTimeSpecGetSecondsAndNano(PRTTIMESPEC pTime, int32_t *pi32Seconds, int32_t *pi32Nano)
{
int64_t i64 = RTTimeSpecGetNano(pTime);
int32_t i32Nano = (int32_t)(i64 % RT_NS_1SEC);
i64 /= RT_NS_1SEC;
if (i32Nano < 0)
{
i32Nano += RT_NS_1SEC;
i64--;
}
*pi32Seconds = (int32_t)i64;
*pi32Nano = i32Nano;
}
/** @def RTTIME_LINUX_KERNEL_PREREQ
* Prerequisite minimum linux kernel version.
* @note Cannot really be moved to iprt/cdefs.h, see the-linux-kernel.h */
/** @def RTTIME_LINUX_KERNEL_PREREQ_LT
* Prerequisite maxium linux kernel version (LT=less-than).
* @note Cannot really be moved to iprt/cdefs.h, see the-linux-kernel.h */
#if defined(RT_OS_LINUX) && defined(LINUX_VERSION_CODE) && defined(KERNEL_VERSION)
# define RTTIME_LINUX_KERNEL_PREREQ(a, b, c) (LINUX_VERSION_CODE >= KERNEL_VERSION(a, b, c))
# define RTTIME_LINUX_KERNEL_PREREQ_LT(a, b, c) (!RTTIME_LINUX_KERNEL_PREREQ(a, b, c))
#else
# define RTTIME_LINUX_KERNEL_PREREQ(a, b, c) 0
# define RTTIME_LINUX_KERNEL_PREREQ_LT(a, b, c) 0
#endif
/* PORTME: Add struct timeval guard macro here. */
#if defined(RTTIME_INCL_TIMEVAL) \
|| defined(_SYS__TIMEVAL_H_) \
|| defined(_SYS_TIME_H) \
|| defined(_TIMEVAL) \
|| defined(_STRUCT_TIMEVAL) \
|| ( defined(RT_OS_LINUX) \
&& defined(_LINUX_TIME_H) \
&& ( !defined(__KERNEL__) \
|| RTTIME_LINUX_KERNEL_PREREQ_LT(5,6,0) /* @bugref{9757} */ ) ) \
|| (defined(RT_OS_NETBSD) && defined(_SYS_TIME_H_))
/**
* Gets the time as POSIX timeval.
*
* @returns pTime.
* @param pTime The time spec to interpret.
* @param pTimeval Where to store the time as POSIX timeval.
*/
DECLINLINE(struct timeval *) RTTimeSpecGetTimeval(PCRTTIMESPEC pTime, struct timeval *pTimeval)
{
int64_t i64 = RTTimeSpecGetMicro(pTime);
int32_t i32Micro = (int32_t)(i64 % RT_US_1SEC);
i64 /= RT_US_1SEC;
if (i32Micro < 0)
{
i32Micro += RT_US_1SEC;
i64--;
}
pTimeval->tv_sec = (time_t)i64;
pTimeval->tv_usec = i32Micro;
return pTimeval;
}
/**
* Sets the time as POSIX timeval.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param pTimeval Pointer to the POSIX timeval struct with the new time.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSetTimeval(PRTTIMESPEC pTime, const struct timeval *pTimeval)
{
return RTTimeSpecAddMicro(RTTimeSpecSetSeconds(pTime, pTimeval->tv_sec), pTimeval->tv_usec);
}
#endif /* various ways of detecting struct timeval */
/* PORTME: Add struct timespec guard macro here. */
#if defined(RTTIME_INCL_TIMESPEC) \
|| defined(_SYS__TIMESPEC_H_) \
|| defined(TIMEVAL_TO_TIMESPEC) \
|| defined(_TIMESPEC) \
|| ( defined(_STRUCT_TIMESPEC) \
&& ( !defined(RT_OS_LINUX) \
|| !defined(__KERNEL__) \
|| RTTIME_LINUX_KERNEL_PREREQ_LT(5,6,0) /* @bugref{9757} */ ) ) \
|| (defined(RT_OS_NETBSD) && defined(_SYS_TIME_H_))
/**
* Gets the time as POSIX timespec.
*
* @returns pTimespec.
* @param pTime The time spec to interpret.
* @param pTimespec Where to store the time as POSIX timespec.
*/
DECLINLINE(struct timespec *) RTTimeSpecGetTimespec(PCRTTIMESPEC pTime, struct timespec *pTimespec)
{
int64_t i64 = RTTimeSpecGetNano(pTime);
int32_t i32Nano = (int32_t)(i64 % RT_NS_1SEC);
i64 /= RT_NS_1SEC;
if (i32Nano < 0)
{
i32Nano += RT_NS_1SEC;
i64--;
}
pTimespec->tv_sec = (time_t)i64;
pTimespec->tv_nsec = i32Nano;
return pTimespec;
}
/**
* Sets the time as POSIX timespec.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param pTimespec Pointer to the POSIX timespec struct with the new time.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSetTimespec(PRTTIMESPEC pTime, const struct timespec *pTimespec)
{
return RTTimeSpecAddNano(RTTimeSpecSetSeconds(pTime, pTimespec->tv_sec), pTimespec->tv_nsec);
}
#endif /* various ways of detecting struct timespec */
#if defined(RT_OS_LINUX) && defined(_LINUX_TIME64_H) /* since linux 3.17 */
/**
* Gets the time a linux 64-bit timespec structure.
* @returns pTimespec.
* @param pTime The time spec to modify.
* @param pTimespec Where to store the time as linux 64-bit timespec.
*/
DECLINLINE(struct timespec64 *) RTTimeSpecGetTimespec64(PCRTTIMESPEC pTime, struct timespec64 *pTimespec)
{
int64_t i64 = RTTimeSpecGetNano(pTime);
int32_t i32Nano = (int32_t)(i64 % RT_NS_1SEC);
i64 /= RT_NS_1SEC;
if (i32Nano < 0)
{
i32Nano += RT_NS_1SEC;
i64--;
}
pTimespec->tv_sec = i64;
pTimespec->tv_nsec = i32Nano;
return pTimespec;
}
/**
* Sets the time from a linux 64-bit timespec structure.
* @returns pTime.
* @param pTime The time spec to modify.
* @param pTimespec Pointer to the linux 64-bit timespec struct with the new time.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSetTimespec64(PRTTIMESPEC pTime, const struct timespec64 *pTimespec)
{
return RTTimeSpecAddNano(RTTimeSpecSetSeconds(pTime, pTimespec->tv_sec), pTimespec->tv_nsec);
}
#endif /* RT_OS_LINUX && _LINUX_TIME64_H */
/** The offset of the unix epoch and the base for NT time (in 100ns units).
* Nt time starts at 1601-01-01 00:00:00. */
#define RTTIME_NT_TIME_OFFSET_UNIX (116444736000000000LL)
/**
* Gets the time as NT time.
*
* @returns NT time.
* @param pTime The time spec to interpret.
*/
DECLINLINE(int64_t) RTTimeSpecGetNtTime(PCRTTIMESPEC pTime)
{
return pTime->i64NanosecondsRelativeToUnixEpoch / 100
+ RTTIME_NT_TIME_OFFSET_UNIX;
}
/**
* Sets the time given by Nt time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param u64NtTime The new time in Nt time.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSetNtTime(PRTTIMESPEC pTime, uint64_t u64NtTime)
{
pTime->i64NanosecondsRelativeToUnixEpoch =
((int64_t)u64NtTime - RTTIME_NT_TIME_OFFSET_UNIX) * 100;
return pTime;
}
#ifdef _FILETIME_
/**
* Gets the time as NT file time.
*
* @returns pFileTime.
* @param pTime The time spec to interpret.
* @param pFileTime Pointer to NT filetime structure.
*/
DECLINLINE(PFILETIME) RTTimeSpecGetNtFileTime(PCRTTIMESPEC pTime, PFILETIME pFileTime)
{
*((uint64_t *)pFileTime) = RTTimeSpecGetNtTime(pTime);
return pFileTime;
}
/**
* Sets the time as NT file time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param pFileTime Where to store the time as Nt file time.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSetNtFileTime(PRTTIMESPEC pTime, const FILETIME *pFileTime)
{
return RTTimeSpecSetNtTime(pTime, *(const uint64_t *)pFileTime);
}
#endif /* _FILETIME_ */
/** The offset to the start of DOS time.
* DOS time starts 1980-01-01 00:00:00. */
#define RTTIME_OFFSET_DOS_TIME (315532800000000000LL)
/**
* Gets the time as seconds relative to the start of dos time.
*
* @returns seconds relative to the start of dos time.
* @param pTime The time spec to interpret.
*/
DECLINLINE(int64_t) RTTimeSpecGetDosSeconds(PCRTTIMESPEC pTime)
{
return (pTime->i64NanosecondsRelativeToUnixEpoch - RTTIME_OFFSET_DOS_TIME)
/ RT_NS_1SEC;
}
/**
* Sets the time given by seconds relative to the start of dos time.
*
* @returns pTime.
* @param pTime The time spec to modify.
* @param i64Seconds The new time in seconds relative to the start of dos time.
*/
DECLINLINE(PRTTIMESPEC) RTTimeSpecSetDosSeconds(PRTTIMESPEC pTime, int64_t i64Seconds)
{
pTime->i64NanosecondsRelativeToUnixEpoch = i64Seconds * RT_NS_1SEC
+ RTTIME_OFFSET_DOS_TIME;
return pTime;
}
/**
* Compare two time specs.
*
* @returns true they are equal.
* @returns false they are not equal.
* @param pTime1 The 1st time spec.
* @param pTime2 The 2nd time spec.
*/
DECLINLINE(bool) RTTimeSpecIsEqual(PCRTTIMESPEC pTime1, PCRTTIMESPEC pTime2)
{
return pTime1->i64NanosecondsRelativeToUnixEpoch == pTime2->i64NanosecondsRelativeToUnixEpoch;
}
/**
* Compare two time specs.
*
* @returns 0 if equal, -1 if @a pLeft is smaller, 1 if @a pLeft is larger.
* @returns false they are not equal.
* @param pLeft The 1st time spec.
* @param pRight The 2nd time spec.
*/
DECLINLINE(int) RTTimeSpecCompare(PCRTTIMESPEC pLeft, PCRTTIMESPEC pRight)
{
if (pLeft->i64NanosecondsRelativeToUnixEpoch == pRight->i64NanosecondsRelativeToUnixEpoch)
return 0;
return pLeft->i64NanosecondsRelativeToUnixEpoch < pRight->i64NanosecondsRelativeToUnixEpoch ? -1 : 1;
}
/**
* Converts a time spec to a ISO date string.
*
* @returns psz on success.
* @returns NULL on buffer underflow.
* @param pTime The time spec.
* @param psz Where to store the string.
* @param cb The size of the buffer.
*/
RTDECL(char *) RTTimeSpecToString(PCRTTIMESPEC pTime, char *psz, size_t cb);
/**
* Attempts to convert an ISO date string to a time structure.
*
* We're a little forgiving with zero padding, unspecified parts, and leading
* and trailing spaces.
*
* @retval pTime on success,
* @retval NULL on failure.
* @param pTime The time spec.
* @param pszString The ISO date string to convert.
*/
RTDECL(PRTTIMESPEC) RTTimeSpecFromString(PRTTIMESPEC pTime, const char *pszString);
/**
* Formats duration as best we can according to ISO-8601, with no fraction.
*
* See RTTimeFormatDurationEx for details.
*
* @returns Number of characters in the output on success. VERR_BUFFER_OVEFLOW
* on failure.
* @param pszDst Pointer to the output buffer. In case of overflow,
* the max number of characters will be written and
* zero terminated, provided @a cbDst isn't zero.
* @param cbDst The size of the output buffer.
* @param pDuration The duration to format.
*/
RTDECL(int) RTTimeFormatDuration(char *pszDst, size_t cbDst, PCRTTIMESPEC pDuration);
/**
* Formats duration as best we can according to ISO-8601.
*
* The returned value is on the form "[-]PnnnnnWnDTnnHnnMnn.fffffffffS", where a
* sequence of 'n' can be between 1 and the given lenght, and all but the
* "nn.fffffffffS" part is optional and will only be outputted when the duration
* is sufficiently large. The code currently does not omit any inbetween
* elements other than the day count (D), so an exactly 7 day duration is
* formatted as "P1WT0H0M0.000000000S" when @a cFractionDigits is 9.
*
* @returns Number of characters in the output on success. VERR_BUFFER_OVEFLOW
* on failure.
* @retval VERR_OUT_OF_RANGE if @a cFractionDigits is too large.
* @param pszDst Pointer to the output buffer. In case of overflow,
* the max number of characters will be written and
* zero terminated, provided @a cbDst isn't zero.
* @param cbDst The size of the output buffer.
* @param pDuration The duration to format.
* @param cFractionDigits Number of digits in the second fraction part. Zero
* for whole no fraction. Max is 9 (nano seconds).
*/
RTDECL(ssize_t) RTTimeFormatDurationEx(char *pszDst, size_t cbDst, PCRTTIMESPEC pDuration, uint32_t cFractionDigits);
/** Max length of a RTTimeFormatDurationEx output string. */
#define RTTIME_DURATION_STR_LEN (sizeof("-P99999W7D23H59M59.123456789S") + 2)
/** @} */
/**
* Exploded time.
*/
typedef struct RTTIME
{
/** The year number. */
int32_t i32Year;
/** The month of the year (1-12). January is 1. */
uint8_t u8Month;
/** The day of the week (0-6). Monday is 0. */
uint8_t u8WeekDay;
/** The day of the year (1-366). January the 1st is 1. */
uint16_t u16YearDay;
/** The day of the month (1-31). */
uint8_t u8MonthDay;
/** Hour of the day (0-23). */
uint8_t u8Hour;
/** The minute of the hour (0-59). */
uint8_t u8Minute;
/** The second of the minute (0-60).
* (u32Nanosecond / 1000000) */
uint8_t u8Second;
/** The nanoseconds of the second (0-999999999). */
uint32_t u32Nanosecond;
/** Flags, of the RTTIME_FLAGS_* \#defines. */
uint32_t fFlags;
/** UTC time offset in minutes (-840-840). Positive for timezones east of
* UTC, negative for zones to the west. Same as what RTTimeLocalDeltaNano
* & RTTimeLocalDeltaNanoFor returns, just different unit. */
int32_t offUTC;
} RTTIME;
AssertCompileSize(RTTIME, 24);
/** Pointer to a exploded time structure. */
typedef RTTIME *PRTTIME;
/** Pointer to a const exploded time structure. */
typedef const RTTIME *PCRTTIME;
/** @name RTTIME::fFlags values.
* @{ */
/** Set if the time is UTC. If clear the time local time. */
#define RTTIME_FLAGS_TYPE_MASK 3
/** the time is UTC time. */
#define RTTIME_FLAGS_TYPE_UTC 2
/** The time is local time. */
#define RTTIME_FLAGS_TYPE_LOCAL 3
/** Set if the time is local and daylight saving time is in effect.
* Not bit is not valid if RTTIME_FLAGS_NO_DST_DATA is set. */
#define RTTIME_FLAGS_DST RT_BIT(4)
/** Set if the time is local and there is no data available on daylight saving time. */
#define RTTIME_FLAGS_NO_DST_DATA RT_BIT(5)
/** Set if the year is a leap year.
* This is mutual exclusiv with RTTIME_FLAGS_COMMON_YEAR. */
#define RTTIME_FLAGS_LEAP_YEAR RT_BIT(6)
/** Set if the year is a common year.
* This is mutual exclusiv with RTTIME_FLAGS_LEAP_YEAR. */
#define RTTIME_FLAGS_COMMON_YEAR RT_BIT(7)
/** The mask of valid flags. */
#define RTTIME_FLAGS_MASK UINT32_C(0xff)
/** @} */
/**
* Gets the current system time (UTC).
*
* @returns pTime.
* @param pTime Where to store the time.
*/
RTDECL(PRTTIMESPEC) RTTimeNow(PRTTIMESPEC pTime);
/**
* Sets the system time.
*
* @returns IPRT status code
* @param pTime The new system time (UTC).
*
* @remarks This will usually fail because changing the wall time is usually
* requires extra privileges.
*/
RTDECL(int) RTTimeSet(PCRTTIMESPEC pTime);
/**
* Explodes a time spec (UTC).
*
* @returns pTime.
* @param pTime Where to store the exploded time.
* @param pTimeSpec The time spec to exploded.
*/
RTDECL(PRTTIME) RTTimeExplode(PRTTIME pTime, PCRTTIMESPEC pTimeSpec);
/**
* Implodes exploded time to a time spec (UTC).
*
* @returns pTime on success.
* @returns NULL if the pTime data is invalid.
* @param pTimeSpec Where to store the imploded UTC time.
* If pTime specifies a time which outside the range, maximum or
* minimum values will be returned.
* @param pTime Pointer to the exploded time to implode.
* The fields u8Month, u8WeekDay and u8MonthDay are not used,
* and all the other fields are expected to be within their
* bounds. Use RTTimeNormalize() to calculate u16YearDay and
* normalize the ranges of the fields.
*/
RTDECL(PRTTIMESPEC) RTTimeImplode(PRTTIMESPEC pTimeSpec, PCRTTIME pTime);
/**
* Normalizes the fields of a time structure.
*
* It is possible to calculate year-day from month/day and vice
* versa. If you adjust any of of these, make sure to zero the
* other so you make it clear which of the fields to use. If
* it's ambiguous, the year-day field is used (and you get
* assertions in debug builds).
*
* All the time fields and the year-day or month/day fields will
* be adjusted for overflows. (Since all fields are unsigned, there
* is no underflows.) It is possible to exploit this for simple
* date math, though the recommended way of doing that to implode
* the time into a timespec and do the math on that.
*
* @returns pTime on success.
* @returns NULL if the data is invalid.
*
* @param pTime The time structure to normalize.
*
* @remarks This function doesn't work with local time, only with UTC time.
*/
RTDECL(PRTTIME) RTTimeNormalize(PRTTIME pTime);
/**
* Gets the current local system time.
*
* @returns pTime.
* @param pTime Where to store the local time.
*/
RTDECL(PRTTIMESPEC) RTTimeLocalNow(PRTTIMESPEC pTime);
/**
* Gets the current delta between UTC and local time.
*
* @code
* RTTIMESPEC LocalTime;
* RTTimeSpecAddNano(RTTimeNow(&LocalTime), RTTimeLocalDeltaNano());
* @endcode
*
* @returns Returns the nanosecond delta between UTC and local time.
*/
RTDECL(int64_t) RTTimeLocalDeltaNano(void);
/**
* Gets the delta between UTC and local time at the given time.
*
* @code
* RTTIMESPEC LocalTime;
* RTTimeNow(&LocalTime);
* RTTimeSpecAddNano(&LocalTime, RTTimeLocalDeltaNanoFor(&LocalTime));
* @endcode
*
* @param pTimeSpec The time spec giving the time to get the delta for.
* @returns Returns the nanosecond delta between UTC and local time.
*/
RTDECL(int64_t) RTTimeLocalDeltaNanoFor(PCRTTIMESPEC pTimeSpec);
/**
* Explodes a time spec to the localized timezone.
*
* @returns pTime.
* @param pTime Where to store the exploded time.
* @param pTimeSpec The time spec to exploded (UTC).
*/
RTDECL(PRTTIME) RTTimeLocalExplode(PRTTIME pTime, PCRTTIMESPEC pTimeSpec);
/**
* Normalizes the fields of a time structure containing local time.
*
* See RTTimeNormalize for details.
*
* @returns pTime on success.
* @returns NULL if the data is invalid.
* @param pTime The time structure to normalize.
*/
RTDECL(PRTTIME) RTTimeLocalNormalize(PRTTIME pTime);
/**
* Converts a time structure to UTC, relying on UTC offset information
* if it contains local time.
*
* @returns pTime on success.
* @returns NULL if the data is invalid.
* @param pTime The time structure to convert.
*/
RTDECL(PRTTIME) RTTimeConvertToZulu(PRTTIME pTime);
/**
* Converts a time spec to a ISO date string.
*
* @returns psz on success.
* @returns NULL on buffer underflow.
* @param pTime The time. Caller should've normalized this.
* @param psz Where to store the string.
* @param cb The size of the buffer.
*/
RTDECL(char *) RTTimeToString(PCRTTIME pTime, char *psz, size_t cb);
/**
* Converts a time spec to a ISO date string, extended version.
*
* @returns Output string length on success (positive), VERR_BUFFER_OVERFLOW
* (negative) or VERR_OUT_OF_RANGE (negative) on failure.
* @param pTime The time. Caller should've normalized this.
* @param psz Where to store the string.
* @param cb The size of the buffer.
* @param cFractionDigits Number of digits in the fraction. Max is 9.
*/
RTDECL(ssize_t) RTTimeToStringEx(PCRTTIME pTime, char *psz, size_t cb, unsigned cFractionDigits);
/** Suggested buffer length for RTTimeToString and RTTimeToStringEx output, including terminator. */
#define RTTIME_STR_LEN 40
/**
* Attempts to convert an ISO date string to a time structure.
*
* We're a little forgiving with zero padding, unspecified parts, and leading
* and trailing spaces.
*
* @retval pTime on success,
* @retval NULL on failure.
* @param pTime Where to store the time on success.
* @param pszString The ISO date string to convert.
*/
RTDECL(PRTTIME) RTTimeFromString(PRTTIME pTime, const char *pszString);
/**
* Formats the given time on a RTC-2822 compliant format.
*
* @returns Output string length on success (positive), VERR_BUFFER_OVERFLOW
* (negative) on failure.
* @param pTime The time. Caller should've normalized this.
* @param psz Where to store the string.
* @param cb The size of the buffer.
* @param fFlags RTTIME_RFC2822_F_XXX
* @sa RTTIME_RFC2822_LEN
*/
RTDECL(ssize_t) RTTimeToRfc2822(PRTTIME pTime, char *psz, size_t cb, uint32_t fFlags);
/** Suggested buffer length for RTTimeToRfc2822 output, including terminator. */
#define RTTIME_RFC2822_LEN 40
/** @name RTTIME_RFC2822_F_XXX
* @{ */
/** Use the deprecated GMT timezone instead of +/-0000.
* This is required by the HTTP RFC-7231 7.1.1.1. */
#define RTTIME_RFC2822_F_GMT RT_BIT_32(0)
/** @} */
/**
* Attempts to convert an RFC-2822 date string to a time structure.
*
* We're a little forgiving with zero padding, unspecified parts, and leading
* and trailing spaces.
*
* @retval pTime on success,
* @retval NULL on failure.
* @param pTime Where to store the time on success.
* @param pszString The ISO date string to convert.
*/
RTDECL(PRTTIME) RTTimeFromRfc2822(PRTTIME pTime, const char *pszString);
/**
* Checks if a year is a leap year or not.
*
* @returns true if it's a leap year.
* @returns false if it's a common year.
* @param i32Year The year in question.
*/
RTDECL(bool) RTTimeIsLeapYear(int32_t i32Year);
/**
* Compares two normalized time structures.
*
* @retval 0 if equal.
* @retval -1 if @a pLeft is earlier than @a pRight.
* @retval 1 if @a pRight is earlier than @a pLeft.
*
* @param pLeft The left side time. NULL is accepted.
* @param pRight The right side time. NULL is accepted.
*
* @note A NULL time is considered smaller than anything else. If both are
* NULL, they are considered equal.
*/
RTDECL(int) RTTimeCompare(PCRTTIME pLeft, PCRTTIME pRight);
/**
* Gets the current nanosecond timestamp.
*
* @returns nanosecond timestamp.
*/
RTDECL(uint64_t) RTTimeNanoTS(void);
/**
* Gets the current millisecond timestamp.
*
* @returns millisecond timestamp.
*/
RTDECL(uint64_t) RTTimeMilliTS(void);
/**
* Debugging the time api.
*
* @returns the number of 1ns steps which has been applied by RTTimeNanoTS().
*/
RTDECL(uint32_t) RTTimeDbgSteps(void);
/**
* Debugging the time api.
*
* @returns the number of times the TSC interval expired RTTimeNanoTS().
*/
RTDECL(uint32_t) RTTimeDbgExpired(void);
/**
* Debugging the time api.
*
* @returns the number of bad previous values encountered by RTTimeNanoTS().
*/
RTDECL(uint32_t) RTTimeDbgBad(void);
/**
* Debugging the time api.
*
* @returns the number of update races in RTTimeNanoTS().
*/
RTDECL(uint32_t) RTTimeDbgRaces(void);
RTDECL(const char *) RTTimeNanoTSWorkerName(void);
/** @name RTTimeNanoTS GIP worker functions, for TM.
* @{ */
/** Extra info optionally returned by the RTTimeNanoTS GIP workers. */
typedef struct RTITMENANOTSEXTRA
{
/** The TSC value used (delta adjusted). */
uint64_t uTSCValue;
} RTITMENANOTSEXTRA;
/** Pointer to extra info optionally returned by the RTTimeNanoTS GIP workers. */
typedef RTITMENANOTSEXTRA *PRTITMENANOTSEXTRA;
/** Pointer to a RTTIMENANOTSDATA structure. */
typedef struct RTTIMENANOTSDATA *PRTTIMENANOTSDATA;
/**
* Nanosecond timestamp data.
*
* This is used to keep track of statistics and callback so IPRT
* and TM (VirtualBox) can share code.
*
* @remark Keep this in sync with the assembly version in timesupA.asm.
*/
typedef struct RTTIMENANOTSDATA
{
/** Where the previous timestamp is stored.
* This is maintained to ensure that time doesn't go backwards or anything. */
uint64_t volatile *pu64Prev;
/**
* Helper function that's used by the assembly routines when something goes bust.
*
* @param pData Pointer to this structure.
* @param u64NanoTS The calculated nano ts.
* @param u64DeltaPrev The delta relative to the previously returned timestamp.
* @param u64PrevNanoTS The previously returned timestamp (as it was read it).
*/
DECLCALLBACKMEMBER(void, pfnBad,(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS, uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS));
/**
* Callback for when rediscovery is required.
*
* @returns Nanosecond timestamp.
* @param pData Pointer to this structure.
* @param pExtra Where to return extra time info. Optional.
*/
DECLCALLBACKMEMBER(uint64_t, pfnRediscover,(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra));
/**
* Callback for when some CPU index related stuff goes wrong.
*
* @returns Nanosecond timestamp.
* @param pData Pointer to this structure.
* @param pExtra Where to return extra time info. Optional.
* @param idApic The APIC ID if available, otherwise (UINT16_MAX-1).
* @param iCpuSet The CPU set index if available, otherwise
* (UINT16_MAX-1).
* @param iGipCpu The GIP CPU array index if available, otherwise
* (UINT16_MAX-1).
*/
DECLCALLBACKMEMBER(uint64_t, pfnBadCpuIndex,(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra,
uint16_t idApic, uint16_t iCpuSet, uint16_t iGipCpu));
/** Number of 1ns steps because of overshooting the period. */
uint32_t c1nsSteps;
/** The number of times the interval expired (overflow). */
uint32_t cExpired;
/** Number of "bad" previous values. */
uint32_t cBadPrev;
/** The number of update races. */
uint32_t cUpdateRaces;
} RTTIMENANOTSDATA;
#ifndef IN_RING3
/**
* The Ring-3 layout of the RTTIMENANOTSDATA structure.
*/
typedef struct RTTIMENANOTSDATAR3
{
R3PTRTYPE(uint64_t volatile *) pu64Prev;
DECLR3CALLBACKMEMBER(void, pfnBad,(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS, uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS));
DECLR3CALLBACKMEMBER(uint64_t, pfnRediscover,(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra));
DECLR3CALLBACKMEMBER(uint64_t, pfnBadCpuIndex,(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra,
uint16_t idApic, uint16_t iCpuSet, uint16_t iGipCpu));
uint32_t c1nsSteps;
uint32_t cExpired;
uint32_t cBadPrev;
uint32_t cUpdateRaces;
} RTTIMENANOTSDATAR3;
#else
typedef RTTIMENANOTSDATA RTTIMENANOTSDATAR3;
#endif
#ifndef IN_RING0
/**
* The Ring-3 layout of the RTTIMENANOTSDATA structure.
*/
typedef struct RTTIMENANOTSDATAR0
{
R0PTRTYPE(uint64_t volatile *) pu64Prev;
DECLR0CALLBACKMEMBER(void, pfnBad,(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS, uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS));
DECLR0CALLBACKMEMBER(uint64_t, pfnRediscover,(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra));
DECLR0CALLBACKMEMBER(uint64_t, pfnBadCpuIndex,(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra,
uint16_t idApic, uint16_t iCpuSet, uint16_t iGipCpu));
uint32_t c1nsSteps;
uint32_t cExpired;
uint32_t cBadPrev;
uint32_t cUpdateRaces;
} RTTIMENANOTSDATAR0;
#else
typedef RTTIMENANOTSDATA RTTIMENANOTSDATAR0;
#endif
#ifndef IN_RC
/**
* The RC layout of the RTTIMENANOTSDATA structure.
*/
typedef struct RTTIMENANOTSDATARC
{
RCPTRTYPE(uint64_t volatile *) pu64Prev;
DECLRCCALLBACKMEMBER(void, pfnBad,(PRTTIMENANOTSDATA pData, uint64_t u64NanoTS, uint64_t u64DeltaPrev, uint64_t u64PrevNanoTS));
DECLRCCALLBACKMEMBER(uint64_t, pfnRediscover,(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra));
DECLRCCALLBACKMEMBER(uint64_t, pfnBadCpuIndex,(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra,
uint16_t idApic, uint16_t iCpuSet, uint16_t iGipCpu));
uint32_t c1nsSteps;
uint32_t cExpired;
uint32_t cBadPrev;
uint32_t cUpdateRaces;
} RTTIMENANOTSDATARC;
#else
typedef RTTIMENANOTSDATA RTTIMENANOTSDATARC;
#endif
/** Internal RTTimeNanoTS worker (assembly). */
typedef DECLCALLBACKTYPE(uint64_t, FNTIMENANOTSINTERNAL,(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra));
/** Pointer to an internal RTTimeNanoTS worker (assembly). */
typedef FNTIMENANOTSINTERNAL *PFNTIMENANOTSINTERNAL;
RTDECL(uint64_t) RTTimeNanoTSLegacySyncInvarNoDelta(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceSyncInvarNoDelta(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
#ifdef IN_RING3
RTDECL(uint64_t) RTTimeNanoTSLegacyAsyncUseApicId(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLegacyAsyncUseApicIdExt0B(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLegacyAsyncUseApicIdExt8000001E(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLegacyAsyncUseRdtscp(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLegacyAsyncUseRdtscpGroupChNumCl(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLegacyAsyncUseIdtrLim(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLegacySyncInvarWithDeltaUseApicId(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLegacySyncInvarWithDeltaUseApicIdExt0B(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLegacySyncInvarWithDeltaUseApicIdExt8000001E(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLegacySyncInvarWithDeltaUseRdtscp(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLegacySyncInvarWithDeltaUseIdtrLim(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceAsyncUseApicId(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceAsyncUseApicIdExt0B(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceAsyncUseApicIdExt8000001E(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceAsyncUseRdtscp(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceAsyncUseRdtscpGroupChNumCl(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceAsyncUseIdtrLim(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceSyncInvarWithDeltaUseApicId(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceSyncInvarWithDeltaUseApicIdExt0B(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceSyncInvarWithDeltaUseApicIdExt8000001E(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceSyncInvarWithDeltaUseRdtscp(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceSyncInvarWithDeltaUseIdtrLim(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
#else
RTDECL(uint64_t) RTTimeNanoTSLegacyAsync(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLegacySyncInvarWithDelta(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceAsync(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
RTDECL(uint64_t) RTTimeNanoTSLFenceSyncInvarWithDelta(PRTTIMENANOTSDATA pData, PRTITMENANOTSEXTRA pExtra);
#endif
/** @} */
/**
* Gets the current nanosecond timestamp.
*
* This differs from RTTimeNanoTS in that it will use system APIs and not do any
* resolution or performance optimizations.
*
* @returns nanosecond timestamp.
*/
RTDECL(uint64_t) RTTimeSystemNanoTS(void);
/**
* Gets the current millisecond timestamp.
*
* This differs from RTTimeNanoTS in that it will use system APIs and not do any
* resolution or performance optimizations.
*
* @returns millisecond timestamp.
*/
RTDECL(uint64_t) RTTimeSystemMilliTS(void);
/**
* Get the nanosecond timestamp relative to program startup.
*
* @returns Timestamp relative to program startup.
*/
RTDECL(uint64_t) RTTimeProgramNanoTS(void);
/**
* Get the microsecond timestamp relative to program startup.
*
* @returns Timestamp relative to program startup.
*/
RTDECL(uint64_t) RTTimeProgramMicroTS(void);
/**
* Get the millisecond timestamp relative to program startup.
*
* @returns Timestamp relative to program startup.
*/
RTDECL(uint64_t) RTTimeProgramMilliTS(void);
/**
* Get the second timestamp relative to program startup.
*
* @returns Timestamp relative to program startup.
*/
RTDECL(uint32_t) RTTimeProgramSecTS(void);
/**
* Get the RTTimeNanoTS() of when the program started.
*
* @returns Program startup timestamp.
*/
RTDECL(uint64_t) RTTimeProgramStartNanoTS(void);
/**
* Time zone information.
*/
typedef struct RTTIMEZONEINFO
{
/** Unix time zone name (continent/country[/city]|). */
const char *pszUnixName;
/** Windows time zone name. */
const char *pszWindowsName;
/** The length of the unix time zone name. */
uint8_t cchUnixName;
/** The length of the windows time zone name. */
uint8_t cchWindowsName;
/** Two letter country/territory code if applicable, otherwise 'ZZ'. */
char szCountry[3];
/** Two letter windows country/territory code if applicable.
* Empty string if no windows mapping. */
char szWindowsCountry[3];
#if 0 /* Add when needed and it's been extracted. */
/** The standard delta in minutes (add to UTC). */
int16_t cMinStdDelta;
/** The daylight saving time delta in minutes (add to UTC). */
int16_t cMinDstDelta;
#endif
/** closest matching windows time zone index. */
uint32_t idxWindows;
/** Flags, RTTIMEZONEINFO_F_XXX. */
uint32_t fFlags;
} RTTIMEZONEINFO;
/** Pointer to time zone info. */
typedef RTTIMEZONEINFO const *PCRTTIMEZONEINFO;
/** @name RTTIMEZONEINFO_F_XXX - time zone info flags.
* @{ */
/** Indicates golden mapping entry for a windows time zone name. */
#define RTTIMEZONEINFO_F_GOLDEN RT_BIT_32(0)
/** @} */
/**
* Looks up static time zone information by unix name.
*
* @returns Pointer to info entry if found, NULL if not.
* @param pszName The unix zone name (TZ).
*/
RTDECL(PCRTTIMEZONEINFO) RTTimeZoneGetInfoByUnixName(const char *pszName);
/**
* Looks up static time zone information by window name.
*
* @returns Pointer to info entry if found, NULL if not.
* @param pszName The windows zone name (reg key).
*/
RTDECL(PCRTTIMEZONEINFO) RTTimeZoneGetInfoByWindowsName(const char *pszName);
/**
* Looks up static time zone information by windows index.
*
* @returns Pointer to info entry if found, NULL if not.
* @param idxZone The windows timezone index.
*/
RTDECL(PCRTTIMEZONEINFO) RTTimeZoneGetInfoByWindowsIndex(uint32_t idxZone);
/**
* Get the current time zone (TZ).
*
* @returns IPRT status code.
* @param pszName Where to return the time zone name.
* @param cbName The size of the name buffer.
*/
RTDECL(int) RTTimeZoneGetCurrent(char *pszName, size_t cbName);
/** @} */
RT_C_DECLS_END
#endif /* !IPRT_INCLUDED_time_h */
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