1
2#ifndef _LINUX_TIME64_H
3#define _LINUX_TIME64_H
4
5#include <linux/math64.h>
6#include <vdso/time64.h>
7
8typedef __s64 time64_t;
9typedef __u64 timeu64_t;
10
11#include <uapi/linux/time.h>
12
13struct timespec64 {
14 time64_t tv_sec;
15 long tv_nsec;
16};
17
18struct itimerspec64 {
19 struct timespec64 it_interval;
20 struct timespec64 it_value;
21};
22
23
24#define TIME64_MAX ((s64)~((u64)1 << 63))
25#define TIME64_MIN (-TIME64_MAX - 1)
26
27#define KTIME_MAX ((s64)~((u64)1 << 63))
28#define KTIME_SEC_MAX (KTIME_MAX / NSEC_PER_SEC)
29
30
31
32
33
34
35
36
37
38#define TIME_UPTIME_SEC_MAX (30LL * 365 * 24 *3600)
39#define TIME_SETTOD_SEC_MAX (KTIME_SEC_MAX - TIME_UPTIME_SEC_MAX)
40
41static inline int timespec64_equal(const struct timespec64 *a,
42 const struct timespec64 *b)
43{
44 return (a->tv_sec == b->tv_sec) && (a->tv_nsec == b->tv_nsec);
45}
46
47
48
49
50
51
52static inline int timespec64_compare(const struct timespec64 *lhs, const struct timespec64 *rhs)
53{
54 if (lhs->tv_sec < rhs->tv_sec)
55 return -1;
56 if (lhs->tv_sec > rhs->tv_sec)
57 return 1;
58 return lhs->tv_nsec - rhs->tv_nsec;
59}
60
61extern void set_normalized_timespec64(struct timespec64 *ts, time64_t sec, s64 nsec);
62
63static inline struct timespec64 timespec64_add(struct timespec64 lhs,
64 struct timespec64 rhs)
65{
66 struct timespec64 ts_delta;
67 set_normalized_timespec64(&ts_delta, lhs.tv_sec + rhs.tv_sec,
68 lhs.tv_nsec + rhs.tv_nsec);
69 return ts_delta;
70}
71
72
73
74
75static inline struct timespec64 timespec64_sub(struct timespec64 lhs,
76 struct timespec64 rhs)
77{
78 struct timespec64 ts_delta;
79 set_normalized_timespec64(&ts_delta, lhs.tv_sec - rhs.tv_sec,
80 lhs.tv_nsec - rhs.tv_nsec);
81 return ts_delta;
82}
83
84
85
86
87static inline bool timespec64_valid(const struct timespec64 *ts)
88{
89
90 if (ts->tv_sec < 0)
91 return false;
92
93 if ((unsigned long)ts->tv_nsec >= NSEC_PER_SEC)
94 return false;
95 return true;
96}
97
98static inline bool timespec64_valid_strict(const struct timespec64 *ts)
99{
100 if (!timespec64_valid(ts))
101 return false;
102
103 if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)
104 return false;
105 return true;
106}
107
108static inline bool timespec64_valid_settod(const struct timespec64 *ts)
109{
110 if (!timespec64_valid(ts))
111 return false;
112
113 if ((unsigned long long)ts->tv_sec >= TIME_SETTOD_SEC_MAX)
114 return false;
115 return true;
116}
117
118
119
120
121
122
123
124
125static inline s64 timespec64_to_ns(const struct timespec64 *ts)
126{
127
128 if ((unsigned long long)ts->tv_sec >= KTIME_SEC_MAX)
129 return KTIME_MAX;
130
131 return ((s64) ts->tv_sec * NSEC_PER_SEC) + ts->tv_nsec;
132}
133
134
135
136
137
138
139
140extern struct timespec64 ns_to_timespec64(const s64 nsec);
141
142
143
144
145
146
147
148
149
150static __always_inline void timespec64_add_ns(struct timespec64 *a, u64 ns)
151{
152 a->tv_sec += __iter_div_u64_rem(a->tv_nsec + ns, NSEC_PER_SEC, &ns);
153 a->tv_nsec = ns;
154}
155
156
157
158
159
160extern struct timespec64 timespec64_add_safe(const struct timespec64 lhs,
161 const struct timespec64 rhs);
162
163#endif
164