4 #include <linux/types.h>
7 # include <linux/seqlock.h>
10 #ifndef _STRUCT_TIMESPEC
11 #define _STRUCT_TIMESPEC
13 time_t tv_sec
; /* seconds */
14 long tv_nsec
; /* nanoseconds */
19 time_t tv_sec
; /* seconds */
20 suseconds_t tv_usec
; /* microseconds */
24 int tz_minuteswest
; /* minutes west of Greenwich */
25 int tz_dsttime
; /* type of dst correction */
30 /* Parameters used to convert the timespec values: */
31 #define MSEC_PER_SEC 1000L
32 #define USEC_PER_SEC 1000000L
33 #define NSEC_PER_SEC 1000000000L
34 #define NSEC_PER_USEC 1000L
36 static __inline__
int timespec_equal(struct timespec
*a
, struct timespec
*b
)
38 return (a
->tv_sec
== b
->tv_sec
) && (a
->tv_nsec
== b
->tv_nsec
);
41 extern unsigned long mktime(const unsigned int year
, const unsigned int mon
,
42 const unsigned int day
, const unsigned int hour
,
43 const unsigned int min
, const unsigned int sec
);
45 extern void set_normalized_timespec(struct timespec
*ts
, time_t sec
, long nsec
);
48 * Returns true if the timespec is norm, false if denorm:
50 #define timespec_valid(ts) \
51 (((ts)->tv_sec >= 0) && (((unsigned) (ts)->tv_nsec) < NSEC_PER_SEC))
54 * 64-bit nanosec type. Large enough to span 292+ years in nanosecond
55 * resolution. Ought to be enough for a while.
59 extern struct timespec xtime
;
60 extern struct timespec wall_to_monotonic
;
61 extern seqlock_t xtime_lock
;
63 static inline unsigned long get_seconds(void)
68 struct timespec
current_kernel_time(void);
70 #define CURRENT_TIME (current_kernel_time())
71 #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 })
73 extern void do_gettimeofday(struct timeval
*tv
);
74 extern int do_settimeofday(struct timespec
*tv
);
75 extern int do_sys_settimeofday(struct timespec
*tv
, struct timezone
*tz
);
76 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
77 extern long do_utimes(int dfd
, char __user
*filename
, struct timeval
*times
);
79 extern int do_setitimer(int which
, struct itimerval
*value
,
80 struct itimerval
*ovalue
);
81 extern int do_getitimer(int which
, struct itimerval
*value
);
82 extern void getnstimeofday(struct timespec
*tv
);
84 extern struct timespec
timespec_trunc(struct timespec t
, unsigned gran
);
87 * timespec_to_ns - Convert timespec to nanoseconds
88 * @ts: pointer to the timespec variable to be converted
90 * Returns the scalar nanosecond representation of the timespec
93 static inline nsec_t
timespec_to_ns(const struct timespec
*ts
)
95 return ((nsec_t
) ts
->tv_sec
* NSEC_PER_SEC
) + ts
->tv_nsec
;
99 * timeval_to_ns - Convert timeval to nanoseconds
100 * @ts: pointer to the timeval variable to be converted
102 * Returns the scalar nanosecond representation of the timeval
105 static inline nsec_t
timeval_to_ns(const struct timeval
*tv
)
107 return ((nsec_t
) tv
->tv_sec
* NSEC_PER_SEC
) +
108 tv
->tv_usec
* NSEC_PER_USEC
;
112 * ns_to_timespec - Convert nanoseconds to timespec
113 * @nsec: the nanoseconds value to be converted
115 * Returns the timespec representation of the nsec parameter.
117 extern struct timespec
ns_to_timespec(const nsec_t nsec
);
120 * ns_to_timeval - Convert nanoseconds to timeval
121 * @nsec: the nanoseconds value to be converted
123 * Returns the timeval representation of the nsec parameter.
125 extern struct timeval
ns_to_timeval(const nsec_t nsec
);
127 #endif /* __KERNEL__ */
129 #define NFDBITS __NFDBITS
131 #define FD_SETSIZE __FD_SETSIZE
132 #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
133 #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
134 #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
135 #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
138 * Names of the interval timers, and structure
139 * defining a timer setting:
141 #define ITIMER_REAL 0
142 #define ITIMER_VIRTUAL 1
143 #define ITIMER_PROF 2
146 struct timespec it_interval
; /* timer period */
147 struct timespec it_value
; /* timer expiration */
151 struct timeval it_interval
; /* timer interval */
152 struct timeval it_value
; /* current value */
156 * The IDs of the various system clocks (for POSIX.1b interval timers):
158 #define CLOCK_REALTIME 0
159 #define CLOCK_MONOTONIC 1
160 #define CLOCK_PROCESS_CPUTIME_ID 2
161 #define CLOCK_THREAD_CPUTIME_ID 3
164 * The IDs of various hardware clocks:
166 #define CLOCK_SGI_CYCLE 10
167 #define MAX_CLOCKS 16
168 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
169 #define CLOCKS_MONO CLOCK_MONOTONIC
172 * The various flags for setting POSIX.1b interval timers:
174 #define TIMER_ABSTIME 0x01