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git.proxmox.com Git - mirror_ubuntu-eoan-kernel.git/blob - include/linux/time64.h
1 #ifndef _LINUX_TIME64_H
2 #define _LINUX_TIME64_H
4 #include <uapi/linux/time.h>
5 #include <linux/math64.h>
7 typedef __s64 time64_t
;
8 typedef __u64 timeu64_t
;
11 * This wants to go into uapi/linux/time.h once we agreed about the
12 * userspace interfaces.
14 #if __BITS_PER_LONG == 64
15 # define timespec64 timespec
16 #define itimerspec64 itimerspec
19 time64_t tv_sec
; /* seconds */
20 long tv_nsec
; /* nanoseconds */
24 struct timespec64 it_interval
;
25 struct timespec64 it_value
;
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 1000000000000000LL
39 /* Located here for timespec[64]_valid_strict */
40 #define TIME64_MAX ((s64)~((u64)1 << 63))
41 #define KTIME_MAX ((s64)~((u64)1 << 63))
42 #define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
44 #if __BITS_PER_LONG == 64
46 static inline struct timespec
timespec64_to_timespec(const struct timespec64 ts64
)
51 static inline struct timespec64
timespec_to_timespec64(const struct timespec ts
)
56 static inline struct itimerspec
itimerspec64_to_itimerspec(struct itimerspec64
*its64
)
61 static inline struct itimerspec64
itimerspec_to_itimerspec64(struct itimerspec
*its
)
66 # define timespec64_equal timespec_equal
67 # define timespec64_compare timespec_compare
68 # define set_normalized_timespec64 set_normalized_timespec
69 # define timespec64_add timespec_add
70 # define timespec64_sub timespec_sub
71 # define timespec64_valid timespec_valid
72 # define timespec64_valid_strict timespec_valid_strict
73 # define timespec64_to_ns timespec_to_ns
74 # define ns_to_timespec64 ns_to_timespec
75 # define timespec64_add_ns timespec_add_ns
79 static inline struct timespec
timespec64_to_timespec(const struct timespec64 ts64
)
83 ret
.tv_sec
= (time_t)ts64
.tv_sec
;
84 ret
.tv_nsec
= ts64
.tv_nsec
;
88 static inline struct timespec64
timespec_to_timespec64(const struct timespec ts
)
90 struct timespec64 ret
;
92 ret
.tv_sec
= ts
.tv_sec
;
93 ret
.tv_nsec
= ts
.tv_nsec
;
97 static inline struct itimerspec
itimerspec64_to_itimerspec(struct itimerspec64
*its64
)
99 struct itimerspec ret
;
101 ret
.it_interval
= timespec64_to_timespec(its64
->it_interval
);
102 ret
.it_value
= timespec64_to_timespec(its64
->it_value
);
106 static inline struct itimerspec64
itimerspec_to_itimerspec64(struct itimerspec
*its
)
108 struct itimerspec64 ret
;
110 ret
.it_interval
= timespec_to_timespec64(its
->it_interval
);
111 ret
.it_value
= timespec_to_timespec64(its
->it_value
);
115 static inline int timespec64_equal(const struct timespec64
*a
,
116 const struct timespec64
*b
)
118 return (a
->tv_sec
== b
->tv_sec
) && (a
->tv_nsec
== b
->tv_nsec
);
122 * lhs < rhs: return <0
123 * lhs == rhs: return 0
124 * lhs > rhs: return >0
126 static inline int timespec64_compare(const struct timespec64
*lhs
, const struct timespec64
*rhs
)
128 if (lhs
->tv_sec
< rhs
->tv_sec
)
130 if (lhs
->tv_sec
> rhs
->tv_sec
)
132 return lhs
->tv_nsec
- rhs
->tv_nsec
;
135 extern void set_normalized_timespec64(struct timespec64
*ts
, time64_t sec
, s64 nsec
);
137 static inline struct timespec64
timespec64_add(struct timespec64 lhs
,
138 struct timespec64 rhs
)
140 struct timespec64 ts_delta
;
141 set_normalized_timespec64(&ts_delta
, lhs
.tv_sec
+ rhs
.tv_sec
,
142 lhs
.tv_nsec
+ rhs
.tv_nsec
);
147 * sub = lhs - rhs, in normalized form
149 static inline struct timespec64
timespec64_sub(struct timespec64 lhs
,
150 struct timespec64 rhs
)
152 struct timespec64 ts_delta
;
153 set_normalized_timespec64(&ts_delta
, lhs
.tv_sec
- rhs
.tv_sec
,
154 lhs
.tv_nsec
- rhs
.tv_nsec
);
159 * Returns true if the timespec64 is norm, false if denorm:
161 static inline bool timespec64_valid(const struct timespec64
*ts
)
163 /* Dates before 1970 are bogus */
166 /* Can't have more nanoseconds then a second */
167 if ((unsigned long)ts
->tv_nsec
>= NSEC_PER_SEC
)
172 static inline bool timespec64_valid_strict(const struct timespec64
*ts
)
174 if (!timespec64_valid(ts
))
176 /* Disallow values that could overflow ktime_t */
177 if ((unsigned long long)ts
->tv_sec
>= KTIME_SEC_MAX
)
183 * timespec64_to_ns - Convert timespec64 to nanoseconds
184 * @ts: pointer to the timespec64 variable to be converted
186 * Returns the scalar nanosecond representation of the timespec64
189 static inline s64
timespec64_to_ns(const struct timespec64
*ts
)
191 return ((s64
) ts
->tv_sec
* NSEC_PER_SEC
) + ts
->tv_nsec
;
195 * ns_to_timespec64 - Convert nanoseconds to timespec64
196 * @nsec: the nanoseconds value to be converted
198 * Returns the timespec64 representation of the nsec parameter.
200 extern struct timespec64
ns_to_timespec64(const s64 nsec
);
203 * timespec64_add_ns - Adds nanoseconds to a timespec64
204 * @a: pointer to timespec64 to be incremented
205 * @ns: unsigned nanoseconds value to be added
207 * This must always be inlined because its used from the x86-64 vdso,
208 * which cannot call other kernel functions.
210 static __always_inline
void timespec64_add_ns(struct timespec64
*a
, u64 ns
)
212 a
->tv_sec
+= __iter_div_u64_rem(a
->tv_nsec
+ ns
, NSEC_PER_SEC
, &ns
);
219 * timespec64_add_safe assumes both values are positive and checks for
220 * overflow. It will return TIME64_MAX in case of overflow.
222 extern struct timespec64
timespec64_add_safe(const struct timespec64 lhs
,
223 const struct timespec64 rhs
);
225 #endif /* _LINUX_TIME64_H */