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1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef _LINUX_TIME64_H
3 #define _LINUX_TIME64_H
5 #include <uapi/linux/time.h>
6 #include <linux/math64.h>
8 typedef __s64 time64_t
;
9 typedef __u64 timeu64_t
;
12 * This wants to go into uapi/linux/time.h once we agreed about the
13 * userspace interfaces.
15 #if __BITS_PER_LONG == 64
16 # define timespec64 timespec
17 #define itimerspec64 itimerspec
20 time64_t tv_sec
; /* seconds */
21 long tv_nsec
; /* nanoseconds */
25 struct timespec64 it_interval
;
26 struct timespec64 it_value
;
31 /* Parameters used to convert the timespec values: */
32 #define MSEC_PER_SEC 1000L
33 #define USEC_PER_MSEC 1000L
34 #define NSEC_PER_USEC 1000L
35 #define NSEC_PER_MSEC 1000000L
36 #define USEC_PER_SEC 1000000L
37 #define NSEC_PER_SEC 1000000000L
38 #define FSEC_PER_SEC 1000000000000000LL
40 /* Located here for timespec[64]_valid_strict */
41 #define TIME64_MAX ((s64)~((u64)1 << 63))
42 #define KTIME_MAX ((s64)~((u64)1 << 63))
43 #define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
45 #if __BITS_PER_LONG == 64
47 static inline struct timespec
timespec64_to_timespec(const struct timespec64 ts64
)
52 static inline struct timespec64
timespec_to_timespec64(const struct timespec ts
)
57 static inline struct itimerspec
itimerspec64_to_itimerspec(struct itimerspec64
*its64
)
62 static inline struct itimerspec64
itimerspec_to_itimerspec64(struct itimerspec
*its
)
67 # define timespec64_equal timespec_equal
68 # define timespec64_compare timespec_compare
69 # define set_normalized_timespec64 set_normalized_timespec
70 # define timespec64_add timespec_add
71 # define timespec64_sub timespec_sub
72 # define timespec64_valid timespec_valid
73 # define timespec64_valid_strict timespec_valid_strict
74 # define timespec64_to_ns timespec_to_ns
75 # define ns_to_timespec64 ns_to_timespec
76 # define timespec64_add_ns timespec_add_ns
80 static inline struct timespec
timespec64_to_timespec(const struct timespec64 ts64
)
84 ret
.tv_sec
= (time_t)ts64
.tv_sec
;
85 ret
.tv_nsec
= ts64
.tv_nsec
;
89 static inline struct timespec64
timespec_to_timespec64(const struct timespec ts
)
91 struct timespec64 ret
;
93 ret
.tv_sec
= ts
.tv_sec
;
94 ret
.tv_nsec
= ts
.tv_nsec
;
98 static inline struct itimerspec
itimerspec64_to_itimerspec(struct itimerspec64
*its64
)
100 struct itimerspec ret
;
102 ret
.it_interval
= timespec64_to_timespec(its64
->it_interval
);
103 ret
.it_value
= timespec64_to_timespec(its64
->it_value
);
107 static inline struct itimerspec64
itimerspec_to_itimerspec64(struct itimerspec
*its
)
109 struct itimerspec64 ret
;
111 ret
.it_interval
= timespec_to_timespec64(its
->it_interval
);
112 ret
.it_value
= timespec_to_timespec64(its
->it_value
);
116 static inline int timespec64_equal(const struct timespec64
*a
,
117 const struct timespec64
*b
)
119 return (a
->tv_sec
== b
->tv_sec
) && (a
->tv_nsec
== b
->tv_nsec
);
123 * lhs < rhs: return <0
124 * lhs == rhs: return 0
125 * lhs > rhs: return >0
127 static inline int timespec64_compare(const struct timespec64
*lhs
, const struct timespec64
*rhs
)
129 if (lhs
->tv_sec
< rhs
->tv_sec
)
131 if (lhs
->tv_sec
> rhs
->tv_sec
)
133 return lhs
->tv_nsec
- rhs
->tv_nsec
;
136 extern void set_normalized_timespec64(struct timespec64
*ts
, time64_t sec
, s64 nsec
);
138 static inline struct timespec64
timespec64_add(struct timespec64 lhs
,
139 struct timespec64 rhs
)
141 struct timespec64 ts_delta
;
142 set_normalized_timespec64(&ts_delta
, lhs
.tv_sec
+ rhs
.tv_sec
,
143 lhs
.tv_nsec
+ rhs
.tv_nsec
);
148 * sub = lhs - rhs, in normalized form
150 static inline struct timespec64
timespec64_sub(struct timespec64 lhs
,
151 struct timespec64 rhs
)
153 struct timespec64 ts_delta
;
154 set_normalized_timespec64(&ts_delta
, lhs
.tv_sec
- rhs
.tv_sec
,
155 lhs
.tv_nsec
- rhs
.tv_nsec
);
160 * Returns true if the timespec64 is norm, false if denorm:
162 static inline bool timespec64_valid(const struct timespec64
*ts
)
164 /* Dates before 1970 are bogus */
167 /* Can't have more nanoseconds then a second */
168 if ((unsigned long)ts
->tv_nsec
>= NSEC_PER_SEC
)
173 static inline bool timespec64_valid_strict(const struct timespec64
*ts
)
175 if (!timespec64_valid(ts
))
177 /* Disallow values that could overflow ktime_t */
178 if ((unsigned long long)ts
->tv_sec
>= KTIME_SEC_MAX
)
184 * timespec64_to_ns - Convert timespec64 to nanoseconds
185 * @ts: pointer to the timespec64 variable to be converted
187 * Returns the scalar nanosecond representation of the timespec64
190 static inline s64
timespec64_to_ns(const struct timespec64
*ts
)
192 return ((s64
) ts
->tv_sec
* NSEC_PER_SEC
) + ts
->tv_nsec
;
196 * ns_to_timespec64 - Convert nanoseconds to timespec64
197 * @nsec: the nanoseconds value to be converted
199 * Returns the timespec64 representation of the nsec parameter.
201 extern struct timespec64
ns_to_timespec64(const s64 nsec
);
204 * timespec64_add_ns - Adds nanoseconds to a timespec64
205 * @a: pointer to timespec64 to be incremented
206 * @ns: unsigned nanoseconds value to be added
208 * This must always be inlined because its used from the x86-64 vdso,
209 * which cannot call other kernel functions.
211 static __always_inline
void timespec64_add_ns(struct timespec64
*a
, u64 ns
)
213 a
->tv_sec
+= __iter_div_u64_rem(a
->tv_nsec
+ ns
, NSEC_PER_SEC
, &ns
);
220 * timespec64_add_safe assumes both values are positive and checks for
221 * overflow. It will return TIME64_MAX in case of overflow.
223 extern struct timespec64
timespec64_add_safe(const struct timespec64 lhs
,
224 const struct timespec64 rhs
);
226 #endif /* _LINUX_TIME64_H */