[linux-block.git] / include / uapi / linux / time.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI_LINUX_TIME_H
#define _UAPI_LINUX_TIME_H

#include <linux/types.h>
#include <linux/time_types.h>

#ifndef _STRUCT_TIMESPEC
#define _STRUCT_TIMESPEC
struct timespec {
	__kernel_time_t	tv_sec;			/* seconds */
	long		tv_nsec;		/* nanoseconds */
};
#endif

struct timeval {
	__kernel_time_t		tv_sec;		/* seconds */
	__kernel_suseconds_t	tv_usec;	/* microseconds */
};

struct timezone {
	int	tz_minuteswest;	/* minutes west of Greenwich */
	int	tz_dsttime;	/* type of dst correction */
};

/*
 * Names of the interval timers, and structure
 * defining a timer setting:
 */
#define	ITIMER_REAL		0
#define	ITIMER_VIRTUAL		1
#define	ITIMER_PROF		2

struct itimerspec {
	struct timespec it_interval;	/* timer period */
	struct timespec it_value;	/* timer expiration */
};

struct itimerval {
	struct timeval it_interval;	/* timer interval */
	struct timeval it_value;	/* current value */
};

/*
 * The IDs of the various system clocks (for POSIX.1b interval timers):
 */
#define CLOCK_REALTIME			0
#define CLOCK_MONOTONIC			1
#define CLOCK_PROCESS_CPUTIME_ID	2
#define CLOCK_THREAD_CPUTIME_ID		3
#define CLOCK_MONOTONIC_RAW		4
#define CLOCK_REALTIME_COARSE		5
#define CLOCK_MONOTONIC_COARSE		6
#define CLOCK_BOOTTIME			7
#define CLOCK_REALTIME_ALARM		8
#define CLOCK_BOOTTIME_ALARM		9
/*
 * The driver implementing this got removed. The clock ID is kept as a
 * place holder. Do not reuse!
 */
#define CLOCK_SGI_CYCLE			10
#define CLOCK_TAI			11

#define MAX_CLOCKS			16
#define CLOCKS_MASK			(CLOCK_REALTIME | CLOCK_MONOTONIC)
#define CLOCKS_MONO			CLOCK_MONOTONIC

/*
 * The various flags for setting POSIX.1b interval timers:
 */
#define TIMER_ABSTIME			0x01

#endif /* _UAPI_LINUX_TIME_H */
Commit	Line	Data
6f52b16c	1	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
607ca46e DH	2	#ifndef _UAPI_LINUX_TIME_H
	3	#define _UAPI_LINUX_TIME_H
	4
	5	#include <linux/types.h>
ca5e9aba	6	#include <linux/time_types.h>
607ca46e DH	7
	8	#ifndef _STRUCT_TIMESPEC
	9	#define _STRUCT_TIMESPEC
	10	struct timespec {
	11	__kernel_time_t tv_sec; /* seconds */
	12	long tv_nsec; /* nanoseconds */
	13	};
	14	#endif
	15
	16	struct timeval {
	17	__kernel_time_t tv_sec; /* seconds */
	18	__kernel_suseconds_t tv_usec; /* microseconds */
	19	};
	20
	21	struct timezone {
	22	int tz_minuteswest; /* minutes west of Greenwich */
	23	int tz_dsttime; /* type of dst correction */
	24	};
	25
607ca46e DH	26	/*
	27	* Names of the interval timers, and structure
	28	* defining a timer setting:
	29	*/
	30	#define ITIMER_REAL 0
	31	#define ITIMER_VIRTUAL 1
	32	#define ITIMER_PROF 2
	33
	34	struct itimerspec {
	35	struct timespec it_interval; /* timer period */
	36	struct timespec it_value; /* timer expiration */
	37	};
	38
	39	struct itimerval {
	40	struct timeval it_interval; /* timer interval */
	41	struct timeval it_value; /* current value */
	42	};
	43
	44	/*
	45	* The IDs of the various system clocks (for POSIX.1b interval timers):
	46	*/
	47	#define CLOCK_REALTIME 0
	48	#define CLOCK_MONOTONIC 1
	49	#define CLOCK_PROCESS_CPUTIME_ID 2
	50	#define CLOCK_THREAD_CPUTIME_ID 3
	51	#define CLOCK_MONOTONIC_RAW 4
	52	#define CLOCK_REALTIME_COARSE 5
	53	#define CLOCK_MONOTONIC_COARSE 6
	54	#define CLOCK_BOOTTIME 7
	55	#define CLOCK_REALTIME_ALARM 8
	56	#define CLOCK_BOOTTIME_ALARM 9
07903ada CH	57	/*
	58	* The driver implementing this got removed. The clock ID is kept as a
	59	* place holder. Do not reuse!
	60	*/
	61	#define CLOCK_SGI_CYCLE 10
1ff3c967	62	#define CLOCK_TAI 11
607ca46e	63
607ca46e DH	64	#define MAX_CLOCKS 16
	65	#define CLOCKS_MASK (CLOCK_REALTIME \| CLOCK_MONOTONIC)
	66	#define CLOCKS_MONO CLOCK_MONOTONIC
	67
	68	/*
	69	* The various flags for setting POSIX.1b interval timers:
	70	*/
	71	#define TIMER_ABSTIME 0x01
	72
	73	#endif /* _UAPI_LINUX_TIME_H */