1 /*
2 * Copyright (c) 2015-2020 François Tigeot <ftigeot@wolfpond.org>
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
10 * disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 */
26
27 #ifndef _LINUX_KTIME_H_
28 #define _LINUX_KTIME_H_
29
30 #include <linux/time.h>
31 #include <linux/jiffies.h>
32
33 /* time values in nanoseconds */
34 typedef s64 ktime_t;
35
36 static inline ktime_t
ktime_set(const s64 secs,const unsigned long nsecs)37 ktime_set(const s64 secs, const unsigned long nsecs)
38 {
39 return (secs * NSEC_PER_SEC) + (s64)nsecs;
40 }
41
42 static inline s64
ktime_to_us(const ktime_t kt)43 ktime_to_us(const ktime_t kt)
44 {
45 return kt / NSEC_PER_USEC;
46 }
47
48 static inline s64
ktime_us_delta(const ktime_t later,const ktime_t earlier)49 ktime_us_delta(const ktime_t later, const ktime_t earlier)
50 {
51 return later - earlier;
52 }
53
ktime_to_ns(ktime_t kt)54 static inline int64_t ktime_to_ns(ktime_t kt)
55 {
56 return kt;
57 }
58
ktime_to_timeval(ktime_t kt)59 static inline struct timeval ktime_to_timeval(ktime_t kt)
60 {
61 return ns_to_timeval(kt);
62 }
63
ktime_add_ns(ktime_t kt,int64_t ns)64 static inline ktime_t ktime_add_ns(ktime_t kt, int64_t ns)
65 {
66 return kt + ns;
67 }
68
69 static inline ktime_t
ktime_add_ms(const ktime_t kt,const u64 ms)70 ktime_add_ms(const ktime_t kt, const u64 ms)
71 {
72 return ktime_add_ns(kt, NSEC_PER_MSEC * ms);
73 }
74
ktime_sub_ns(ktime_t kt,int64_t ns)75 static inline ktime_t ktime_sub_ns(ktime_t kt, int64_t ns)
76 {
77 return kt - ns;
78 }
79
ktime_get(void)80 static inline ktime_t ktime_get(void)
81 {
82 struct timespec ts;
83
84 nanouptime(&ts);
85 return (ts.tv_sec * NSEC_PER_SEC) + ts.tv_nsec;
86 }
87
88 static inline ktime_t
ktime_sub(ktime_t lhs,ktime_t rhs)89 ktime_sub(ktime_t lhs, ktime_t rhs)
90 {
91 return lhs - rhs;
92 }
93
94 static inline ktime_t
ns_to_ktime(u64 ns)95 ns_to_ktime(u64 ns)
96 {
97 return ns;
98 }
99
100 static inline bool
ktime_before(const ktime_t cmp1,const ktime_t cmp2)101 ktime_before(const ktime_t cmp1, const ktime_t cmp2)
102 {
103 return (cmp1 < cmp2);
104 }
105
106 static inline bool
ktime_after(const ktime_t cmp1,const ktime_t cmp2)107 ktime_after(const ktime_t cmp1, const ktime_t cmp2)
108 {
109 return (cmp1 > cmp2);
110 }
111
112 #define ktime_to_timespec64(kt) ns_to_timespec((kt))
113
114 #include <linux/timekeeping.h>
115
116 #endif /* _LINUX_KTIME_H_ */
117