WebSVN – Kolibri OS – Blame – /drivers/include/linux/time.h

Rev	Author	Line No.	Line
4065	Serge	1	#ifndef _LINUX_TIME_H
		2	#define _LINUX_TIME_H
		3
5270	serge	4	# include
		5	# include
4065	Serge	6	# include
5270	serge	7	# include
4065	Serge	8
		9	extern struct timezone sys_tz;
		10
		11	#define TIME_T_MAX (time_t)((1UL << ((sizeof(time_t) << 3) - 1)) - 1)
		12
		13	static inline int timespec_equal(const struct timespec *a,
		14	const struct timespec *b)
		15	{
		16	return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
		17	}
		18
		19	/*
		20	* lhs < rhs: return <0
		21	* lhs == rhs: return 0
		22	* lhs > rhs: return >0
		23	*/
		24	static inline int timespec_compare(const struct timespec lhs, const struct timespec rhs)
		25	{
		26	if (lhs->tv_sec < rhs->tv_sec)
		27	return -1;
		28	if (lhs->tv_sec > rhs->tv_sec)
		29	return 1;
		30	return lhs->tv_nsec - rhs->tv_nsec;
		31	}
		32
		33	static inline int timeval_compare(const struct timeval lhs, const struct timeval rhs)
		34	{
		35	if (lhs->tv_sec < rhs->tv_sec)
		36	return -1;
		37	if (lhs->tv_sec > rhs->tv_sec)
		38	return 1;
		39	return lhs->tv_usec - rhs->tv_usec;
		40	}
		41
5270	serge	42	extern time64_t mktime64(const unsigned int year, const unsigned int mon,
6082	serge	43	const unsigned int day, const unsigned int hour,
		44	const unsigned int min, const unsigned int sec);
4065	Serge	45
5270	serge	46	/**
		47	* Deprecated. Use mktime64().
		48	*/
		49	static inline unsigned long mktime(const unsigned int year,
		50	const unsigned int mon, const unsigned int day,
		51	const unsigned int hour, const unsigned int min,
		52	const unsigned int sec)
		53	{
		54	return mktime64(year, mon, day, hour, min, sec);
		55	}
		56
4065	Serge	57	extern void set_normalized_timespec(struct timespec *ts, time_t sec, s64 nsec);
		58
		59	/*
		60	* timespec_add_safe assumes both values are positive and checks
		61	* for overflow. It will return TIME_T_MAX if the reutrn would be
		62	* smaller then either of the arguments.
		63	*/
		64	extern struct timespec timespec_add_safe(const struct timespec lhs,
		65	const struct timespec rhs);
		66
		67
		68	static inline struct timespec timespec_add(struct timespec lhs,
		69	struct timespec rhs)
		70	{
		71	struct timespec ts_delta;
		72	set_normalized_timespec(&ts_delta, lhs.tv_sec + rhs.tv_sec,
		73	lhs.tv_nsec + rhs.tv_nsec);
		74	return ts_delta;
		75	}
		76
		77	/*
		78	* sub = lhs - rhs, in normalized form
		79	*/
		80	static inline struct timespec timespec_sub(struct timespec lhs,
		81	struct timespec rhs)
		82	{
		83	struct timespec ts_delta;
		84	set_normalized_timespec(&ts_delta, lhs.tv_sec - rhs.tv_sec,
		85	lhs.tv_nsec - rhs.tv_nsec);
		86	return ts_delta;
		87	}
		88
		89	/*
		90	* Returns true if the timespec is norm, false if denorm:
		91	*/
		92	static inline bool timespec_valid(const struct timespec *ts)
		93	{
		94	/* Dates before 1970 are bogus */
		95	if (ts->tv_sec < 0)
		96	return false;
		97	/* Can't have more nanoseconds then a second */
		98	if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC)
		99	return false;
		100	return true;
		101	}
		102
		103	static inline bool timespec_valid_strict(const struct timespec *ts)
		104	{
		105	if (!timespec_valid(ts))
		106	return false;
		107	/* Disallow values that could overflow ktime_t */
		108	if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)
		109	return false;
		110	return true;
		111	}
		112
6082	serge	113	static inline bool timeval_valid(const struct timeval *tv)
		114	{
		115	/* Dates before 1970 are bogus */
		116	if (tv->tv_sec < 0)
		117	return false;
		118
		119	/* Can't have more microseconds then a second */
		120	if (tv->tv_usec < 0 \|\| tv->tv_usec >= USEC_PER_SEC)
		121	return false;
		122
		123	return true;
		124	}
		125
5270	serge	126	extern struct timespec timespec_trunc(struct timespec t, unsigned gran);
4065	Serge	127
		128	#define CURRENT_TIME (current_kernel_time())
		129	#define CURRENT_TIME_SEC ((struct timespec) { get_seconds(), 0 })
		130
		131	/* Some architectures do not supply their own clocksource.
		132	* This is mainly the case in architectures that get their
		133	* inter-tick times by reading the counter on their interval
		134	* timer. Since these timers wrap every tick, they're not really
		135	* useful as clocksources. Wrapping them to act like one is possible
		136	* but not very efficient. So we provide a callout these arches
		137	* can implement for use with the jiffies clocksource to provide
		138	* finer then tick granular time.
		139	*/
		140	#ifdef CONFIG_ARCH_USES_GETTIMEOFFSET
		141	extern u32 (*arch_gettimeoffset)(void);
		142	#endif
		143
		144	struct itimerval;
		145	extern int do_setitimer(int which, struct itimerval *value,
		146	struct itimerval *ovalue);
		147	extern int do_getitimer(int which, struct itimerval *value);
		148
5270	serge	149	extern unsigned int alarm_setitimer(unsigned int seconds);
4065	Serge	150
5270	serge	151	extern long do_utimes(int dfd, const char __user filename, struct timespec times, int flags);
		152
4065	Serge	153	struct tms;
		154	extern void do_sys_times(struct tms *);
		155
		156	/*
		157	* Similar to the struct tm in userspace , but it needs to be here so
		158	* that the kernel source is self contained.
		159	*/
		160	struct tm {
		161	/*
		162	* the number of seconds after the minute, normally in the range
		163	* 0 to 59, but can be up to 60 to allow for leap seconds
		164	*/
		165	int tm_sec;
		166	/* the number of minutes after the hour, in the range 0 to 59*/
		167	int tm_min;
		168	/* the number of hours past midnight, in the range 0 to 23 */
		169	int tm_hour;
		170	/* the day of the month, in the range 1 to 31 */
		171	int tm_mday;
		172	/* the number of months since January, in the range 0 to 11 */
		173	int tm_mon;
		174	/* the number of years since 1900 */
		175	long tm_year;
		176	/* the number of days since Sunday, in the range 0 to 6 */
		177	int tm_wday;
		178	/* the number of days since January 1, in the range 0 to 365 */
		179	int tm_yday;
		180	};
		181
		182	void time_to_tm(time_t totalsecs, int offset, struct tm *result);
		183
		184	/**
		185	* timespec_to_ns - Convert timespec to nanoseconds
		186	* @ts: pointer to the timespec variable to be converted
		187	*
		188	* Returns the scalar nanosecond representation of the timespec
		189	* parameter.
		190	*/
		191	static inline s64 timespec_to_ns(const struct timespec *ts)
		192	{
		193	return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
		194	}
		195
		196	/**
		197	* timeval_to_ns - Convert timeval to nanoseconds
		198	* @ts: pointer to the timeval variable to be converted
		199	*
		200	* Returns the scalar nanosecond representation of the timeval
		201	* parameter.
		202	*/
		203	static inline s64 timeval_to_ns(const struct timeval *tv)
		204	{
		205	return ((s64) tv->tv_sec * NSEC_PER_SEC) +
		206	tv->tv_usec * NSEC_PER_USEC;
		207	}
		208
		209	/**
		210	* ns_to_timespec - Convert nanoseconds to timespec
		211	* @nsec: the nanoseconds value to be converted
		212	*
		213	* Returns the timespec representation of the nsec parameter.
		214	*/
		215	extern struct timespec ns_to_timespec(const s64 nsec);
		216
		217	/**
		218	* ns_to_timeval - Convert nanoseconds to timeval
		219	* @nsec: the nanoseconds value to be converted
		220	*
		221	* Returns the timeval representation of the nsec parameter.
		222	*/
		223	extern struct timeval ns_to_timeval(const s64 nsec);
		224
		225	/**
		226	* timespec_add_ns - Adds nanoseconds to a timespec
		227	* @a: pointer to timespec to be incremented
		228	* @ns: unsigned nanoseconds value to be added
		229	*
		230	* This must always be inlined because its used from the x86-64 vdso,
		231	* which cannot call other kernel functions.
		232	*/
		233	static __always_inline void timespec_add_ns(struct timespec *a, u64 ns)
		234	{
		235	a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns);
		236	a->tv_nsec = ns;
		237	}
		238
		239	#endif

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(root)/drivers/include/linux/time.h – Rev 6082