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_MSEC 1000L
33 #define NSEC_PER_USEC 1000L
34 #define NSEC_PER_MSEC 1000000L
35 #define USEC_PER_SEC 1000000L
36 #define NSEC_PER_SEC 1000000000L
37 #define FSEC_PER_SEC 1000000000000000L
39 static inline int timespec_equal(struct timespec
*a
, struct timespec
*b
)
41 return (a
->tv_sec
== b
->tv_sec
) && (a
->tv_nsec
== b
->tv_nsec
);
45 * lhs < rhs: return <0
46 * lhs == rhs: return 0
47 * lhs > rhs: return >0
49 static inline int timespec_compare(struct timespec
*lhs
, struct timespec
*rhs
)
51 if (lhs
->tv_sec
< rhs
->tv_sec
)
53 if (lhs
->tv_sec
> rhs
->tv_sec
)
55 return lhs
->tv_nsec
- rhs
->tv_nsec
;
58 static inline int timeval_compare(struct timeval
*lhs
, struct timeval
*rhs
)
60 if (lhs
->tv_sec
< rhs
->tv_sec
)
62 if (lhs
->tv_sec
> rhs
->tv_sec
)
64 return lhs
->tv_usec
- rhs
->tv_usec
;
67 extern unsigned long mktime(const unsigned int year
, const unsigned int mon
,
68 const unsigned int day
, const unsigned int hour
,
69 const unsigned int min
, const unsigned int sec
);
71 extern void set_normalized_timespec(struct timespec
*ts
, time_t sec
, long nsec
);
74 * Returns true if the timespec is norm, false if denorm:
76 #define timespec_valid(ts) \
77 (((ts)->tv_sec >= 0) && (((unsigned long) (ts)->tv_nsec) < NSEC_PER_SEC))
79 extern struct timespec xtime
;
80 extern struct timespec wall_to_monotonic
;
81 extern seqlock_t xtime_lock
;
83 void timekeeping_init(void);
85 static inline unsigned long get_seconds(void)
90 struct timespec
current_kernel_time(void);
92 #define CURRENT_TIME (current_kernel_time())
93 #define CURRENT_TIME_SEC ((struct timespec) { xtime.tv_sec, 0 })
95 extern void do_gettimeofday(struct timeval
*tv
);
96 extern int do_settimeofday(struct timespec
*tv
);
97 extern int do_sys_settimeofday(struct timespec
*tv
, struct timezone
*tz
);
98 #define do_posix_clock_monotonic_gettime(ts) ktime_get_ts(ts)
99 extern long do_utimes(int dfd
, char __user
*filename
, struct timeval
*times
);
101 extern int do_setitimer(int which
, struct itimerval
*value
,
102 struct itimerval
*ovalue
);
103 extern unsigned int alarm_setitimer(unsigned int seconds
);
104 extern int do_getitimer(int which
, struct itimerval
*value
);
105 extern void getnstimeofday(struct timespec
*tv
);
107 extern struct timespec
timespec_trunc(struct timespec t
, unsigned gran
);
108 extern int timekeeping_is_continuous(void);
111 * timespec_to_ns - Convert timespec to nanoseconds
112 * @ts: pointer to the timespec variable to be converted
114 * Returns the scalar nanosecond representation of the timespec
117 static inline s64
timespec_to_ns(const struct timespec
*ts
)
119 return ((s64
) ts
->tv_sec
* NSEC_PER_SEC
) + ts
->tv_nsec
;
123 * timeval_to_ns - Convert timeval to nanoseconds
124 * @ts: pointer to the timeval variable to be converted
126 * Returns the scalar nanosecond representation of the timeval
129 static inline s64
timeval_to_ns(const struct timeval
*tv
)
131 return ((s64
) tv
->tv_sec
* NSEC_PER_SEC
) +
132 tv
->tv_usec
* NSEC_PER_USEC
;
136 * ns_to_timespec - Convert nanoseconds to timespec
137 * @nsec: the nanoseconds value to be converted
139 * Returns the timespec representation of the nsec parameter.
141 extern struct timespec
ns_to_timespec(const s64 nsec
);
144 * ns_to_timeval - Convert nanoseconds to timeval
145 * @nsec: the nanoseconds value to be converted
147 * Returns the timeval representation of the nsec parameter.
149 extern struct timeval
ns_to_timeval(const s64 nsec
);
152 * timespec_add_ns - Adds nanoseconds to a timespec
153 * @a: pointer to timespec to be incremented
154 * @ns: unsigned nanoseconds value to be added
156 static inline void timespec_add_ns(struct timespec
*a
, u64 ns
)
159 while(unlikely(ns
>= NSEC_PER_SEC
)) {
165 #endif /* __KERNEL__ */
167 #define NFDBITS __NFDBITS
169 #define FD_SETSIZE __FD_SETSIZE
170 #define FD_SET(fd,fdsetp) __FD_SET(fd,fdsetp)
171 #define FD_CLR(fd,fdsetp) __FD_CLR(fd,fdsetp)
172 #define FD_ISSET(fd,fdsetp) __FD_ISSET(fd,fdsetp)
173 #define FD_ZERO(fdsetp) __FD_ZERO(fdsetp)
176 * Names of the interval timers, and structure
177 * defining a timer setting:
179 #define ITIMER_REAL 0
180 #define ITIMER_VIRTUAL 1
181 #define ITIMER_PROF 2
184 struct timespec it_interval
; /* timer period */
185 struct timespec it_value
; /* timer expiration */
189 struct timeval it_interval
; /* timer interval */
190 struct timeval it_value
; /* current value */
194 * The IDs of the various system clocks (for POSIX.1b interval timers):
196 #define CLOCK_REALTIME 0
197 #define CLOCK_MONOTONIC 1
198 #define CLOCK_PROCESS_CPUTIME_ID 2
199 #define CLOCK_THREAD_CPUTIME_ID 3
202 * The IDs of various hardware clocks:
204 #define CLOCK_SGI_CYCLE 10
205 #define MAX_CLOCKS 16
206 #define CLOCKS_MASK (CLOCK_REALTIME | CLOCK_MONOTONIC)
207 #define CLOCKS_MONO CLOCK_MONOTONIC
210 * The various flags for setting POSIX.1b interval timers:
212 #define TIMER_ABSTIME 0x01