linux/include/linux/time64.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_TIME64_H
#define _LINUX_TIME64_H

#include <linux/math64.h>
#include <vdso/time64.h>

time64_t;
timeu64_t;

#include <uapi/linux/time.h>

struct timespec64 { … };

struct itimerspec64 { … };

/* Parameters used to convert the timespec values: */
#define PSEC_PER_NSEC …

/* Located here for timespec[64]_valid_strict */
#define TIME64_MAX …
#define TIME64_MIN …

#define KTIME_MAX …
#define KTIME_MIN …
#define KTIME_SEC_MAX …
#define KTIME_SEC_MIN …

/*
 * Limits for settimeofday():
 *
 * To prevent setting the time close to the wraparound point time setting
 * is limited so a reasonable uptime can be accomodated. Uptime of 30 years
 * should be really sufficient, which means the cutoff is 2232. At that
 * point the cutoff is just a small part of the larger problem.
 */
#define TIME_UPTIME_SEC_MAX …
#define TIME_SETTOD_SEC_MAX …

static inline int timespec64_equal(const struct timespec64 *a,
				   const struct timespec64 *b)
{ … }

/*
 * lhs < rhs:  return <0
 * lhs == rhs: return 0
 * lhs > rhs:  return >0
 */
static inline int timespec64_compare(const struct timespec64 *lhs, const struct timespec64 *rhs)
{ … }

extern void set_normalized_timespec64(struct timespec64 *ts, time64_t sec, s64 nsec);

static inline struct timespec64 timespec64_add(struct timespec64 lhs,
						struct timespec64 rhs)
{ … }

/*
 * sub = lhs - rhs, in normalized form
 */
static inline struct timespec64 timespec64_sub(struct timespec64 lhs,
						struct timespec64 rhs)
{ … }

/*
 * Returns true if the timespec64 is norm, false if denorm:
 */
static inline bool timespec64_valid(const struct timespec64 *ts)
{ … }

static inline bool timespec64_valid_strict(const struct timespec64 *ts)
{ … }

static inline bool timespec64_valid_settod(const struct timespec64 *ts)
{ … }

/**
 * timespec64_to_ns - Convert timespec64 to nanoseconds
 * @ts:		pointer to the timespec64 variable to be converted
 *
 * Returns the scalar nanosecond representation of the timespec64
 * parameter.
 */
static inline s64 timespec64_to_ns(const struct timespec64 *ts)
{ … }

/**
 * ns_to_timespec64 - Convert nanoseconds to timespec64
 * @nsec:	the nanoseconds value to be converted
 *
 * Returns the timespec64 representation of the nsec parameter.
 */
extern struct timespec64 ns_to_timespec64(s64 nsec);

/**
 * timespec64_add_ns - Adds nanoseconds to a timespec64
 * @a:		pointer to timespec64 to be incremented
 * @ns:		unsigned nanoseconds value to be added
 *
 * This must always be inlined because its used from the x86-64 vdso,
 * which cannot call other kernel functions.
 */
static __always_inline void timespec64_add_ns(struct timespec64 *a, u64 ns)
{ … }

/*
 * timespec64_add_safe assumes both values are positive and checks for
 * overflow. It will return TIME64_MAX in case of overflow.
 */
extern struct timespec64 timespec64_add_safe(const struct timespec64 lhs,
					 const struct timespec64 rhs);

#endif /* _LINUX_TIME64_H */