1 #ifndef _LINUX_TIME64_H
2 #define _LINUX_TIME64_H
4 #include <uapi/linux/time.h>
6 typedef __s64 time64_t
;
9 * This wants to go into uapi/linux/time.h once we agreed about the
10 * userspace interfaces.
12 #if __BITS_PER_LONG == 64
13 # define timespec64 timespec
16 time64_t tv_sec
; /* seconds */
17 long tv_nsec
; /* nanoseconds */
21 /* Parameters used to convert the timespec values: */
22 #define MSEC_PER_SEC 1000L
23 #define USEC_PER_MSEC 1000L
24 #define NSEC_PER_USEC 1000L
25 #define NSEC_PER_MSEC 1000000L
26 #define USEC_PER_SEC 1000000L
27 #define NSEC_PER_SEC 1000000000L
28 #define FSEC_PER_SEC 1000000000000000LL
30 /* Located here for timespec[64]_valid_strict */
31 #define KTIME_MAX ((s64)~((u64)1 << 63))
32 #define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
34 #if __BITS_PER_LONG == 64
36 static inline struct timespec
timespec64_to_timespec(const struct timespec64 ts64
)
41 static inline struct timespec64
timespec_to_timespec64(const struct timespec ts
)
46 # define timespec64_equal timespec_equal
47 # define timespec64_compare timespec_compare
48 # define set_normalized_timespec64 set_normalized_timespec
49 # define timespec64_add_safe timespec_add_safe
50 # define timespec64_add timespec_add
51 # define timespec64_sub timespec_sub
52 # define timespec64_valid timespec_valid
53 # define timespec64_valid_strict timespec_valid_strict
54 # define timespec64_to_ns timespec_to_ns
55 # define ns_to_timespec64 ns_to_timespec
56 # define timespec64_add_ns timespec_add_ns
60 static inline struct timespec
timespec64_to_timespec(const struct timespec64 ts64
)
64 ret
.tv_sec
= (time_t)ts64
.tv_sec
;
65 ret
.tv_nsec
= ts64
.tv_nsec
;
69 static inline struct timespec64
timespec_to_timespec64(const struct timespec ts
)
71 struct timespec64 ret
;
73 ret
.tv_sec
= ts
.tv_sec
;
74 ret
.tv_nsec
= ts
.tv_nsec
;
78 static inline int timespec64_equal(const struct timespec64
*a
,
79 const struct timespec64
*b
)
81 return (a
->tv_sec
== b
->tv_sec
) && (a
->tv_nsec
== b
->tv_nsec
);
85 * lhs < rhs: return <0
86 * lhs == rhs: return 0
87 * lhs > rhs: return >0
89 static inline int timespec64_compare(const struct timespec64
*lhs
, const struct timespec64
*rhs
)
91 if (lhs
->tv_sec
< rhs
->tv_sec
)
93 if (lhs
->tv_sec
> rhs
->tv_sec
)
95 return lhs
->tv_nsec
- rhs
->tv_nsec
;
98 extern void set_normalized_timespec64(struct timespec64
*ts
, time64_t sec
, s64 nsec
);
101 * timespec64_add_safe assumes both values are positive and checks for
102 * overflow. It will return TIME_T_MAX if the returned value would be
103 * smaller then either of the arguments.
105 extern struct timespec64
timespec64_add_safe(const struct timespec64 lhs
,
106 const struct timespec64 rhs
);
109 static inline struct timespec64
timespec64_add(struct timespec64 lhs
,
110 struct timespec64 rhs
)
112 struct timespec64 ts_delta
;
113 set_normalized_timespec64(&ts_delta
, lhs
.tv_sec
+ rhs
.tv_sec
,
114 lhs
.tv_nsec
+ rhs
.tv_nsec
);
119 * sub = lhs - rhs, in normalized form
121 static inline struct timespec64
timespec64_sub(struct timespec64 lhs
,
122 struct timespec64 rhs
)
124 struct timespec64 ts_delta
;
125 set_normalized_timespec64(&ts_delta
, lhs
.tv_sec
- rhs
.tv_sec
,
126 lhs
.tv_nsec
- rhs
.tv_nsec
);
131 * Returns true if the timespec64 is norm, false if denorm:
133 static inline bool timespec64_valid(const struct timespec64
*ts
)
135 /* Dates before 1970 are bogus */
138 /* Can't have more nanoseconds then a second */
139 if ((unsigned long)ts
->tv_nsec
>= NSEC_PER_SEC
)
144 static inline bool timespec64_valid_strict(const struct timespec64
*ts
)
146 if (!timespec64_valid(ts
))
148 /* Disallow values that could overflow ktime_t */
149 if ((unsigned long long)ts
->tv_sec
>= KTIME_SEC_MAX
)
155 * timespec64_to_ns - Convert timespec64 to nanoseconds
156 * @ts: pointer to the timespec64 variable to be converted
158 * Returns the scalar nanosecond representation of the timespec64
161 static inline s64
timespec64_to_ns(const struct timespec64
*ts
)
163 return ((s64
) ts
->tv_sec
* NSEC_PER_SEC
) + ts
->tv_nsec
;
167 * ns_to_timespec64 - Convert nanoseconds to timespec64
168 * @nsec: the nanoseconds value to be converted
170 * Returns the timespec64 representation of the nsec parameter.
172 extern struct timespec64
ns_to_timespec64(const s64 nsec
);
175 * timespec64_add_ns - Adds nanoseconds to a timespec64
176 * @a: pointer to timespec64 to be incremented
177 * @ns: unsigned nanoseconds value to be added
179 * This must always be inlined because its used from the x86-64 vdso,
180 * which cannot call other kernel functions.
182 static __always_inline
void timespec64_add_ns(struct timespec64
*a
, u64 ns
)
184 a
->tv_sec
+= __iter_div_u64_rem(a
->tv_nsec
+ ns
, NSEC_PER_SEC
, &ns
);
190 #endif /* _LINUX_TIME64_H */