1 /* $NetBSD: ktime.h,v 1.21 2021/12/19 12:30:23 riastradh Exp $ */
2
3 /*-
4 * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Taylor R. Campbell.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifndef _LINUX_KTIME_H_
33 #define _LINUX_KTIME_H_
34
35 #include <sys/types.h>
36 #include <sys/endian.h>
37 #include <sys/kernel.h>
38 #include <sys/time.h>
39 #include <sys/timevar.h>
40
41 #include <linux/jiffies.h>
42 #include <linux/time.h>
43
44 typedef int64_t ktime_t;
45
46 static inline int64_t
ktime_to_ns(ktime_t kt)47 ktime_to_ns(ktime_t kt)
48 {
49 return kt;
50 }
51
52 static inline int64_t
ktime_to_us(ktime_t kt)53 ktime_to_us(ktime_t kt)
54 {
55 return ktime_to_ns(kt)/1000;
56 }
57
58 static inline int64_t
ktime_to_ms(ktime_t kt)59 ktime_to_ms(ktime_t kt)
60 {
61 return ktime_to_ns(kt)/1000000;
62 }
63
64 static inline ktime_t
ns_to_ktime(int64_t nsec)65 ns_to_ktime(int64_t nsec)
66 {
67 return nsec;
68 }
69
70 static inline ktime_t
ktime_add(ktime_t a,ktime_t b)71 ktime_add(ktime_t a, ktime_t b)
72 {
73 return ns_to_ktime(ktime_to_ns(a) + ktime_to_ns(b));
74 }
75
76 static inline ktime_t
ktime_add_ns(ktime_t kt,int64_t nsec)77 ktime_add_ns(ktime_t kt, int64_t nsec)
78 {
79 return ns_to_ktime(ktime_to_ns(kt) + nsec);
80 }
81
82 static inline ktime_t
ktime_add_us(ktime_t kt,int64_t usec)83 ktime_add_us(ktime_t kt, int64_t usec)
84 {
85 return ktime_add_ns(kt, 1000 * usec);
86 }
87
88 static inline ktime_t
ktime_sub(ktime_t a,ktime_t b)89 ktime_sub(ktime_t a, ktime_t b)
90 {
91 return ns_to_ktime(ktime_to_ns(a) - ktime_to_ns(b));
92 }
93
94 static inline ktime_t
ktime_sub_ns(ktime_t a,int64_t nsec)95 ktime_sub_ns(ktime_t a, int64_t nsec)
96 {
97 return ns_to_ktime(ktime_to_ns(a) - nsec);
98 }
99
100 static inline struct timespec
ktime_to_timespec(ktime_t kt)101 ktime_to_timespec(ktime_t kt)
102 {
103 return ns_to_timespec(ktime_to_ns(kt));
104 }
105 #define ktime_to_timespec64 ktime_to_timespec
106
107 static inline struct timeval
ktime_to_timeval(ktime_t kt)108 ktime_to_timeval(ktime_t kt)
109 {
110 return ns_to_timeval(ktime_to_ns(kt));
111 }
112
113 static inline ktime_t
timespec_to_ktime(struct timespec ts)114 timespec_to_ktime(struct timespec ts)
115 {
116 /* XXX Silently truncate? */
117 return ns_to_ktime(1000000000*(int64_t)ts.tv_sec + ts.tv_nsec);
118 }
119 #define timespec64_to_ktime timespec_to_ktime
120
121 static inline ktime_t
ktime_get(void)122 ktime_get(void)
123 {
124 struct timespec ts;
125
126 nanouptime(&ts);
127
128 return timespec_to_ktime(ts);
129 }
130
131 static inline ktime_t
ktime_get_real(void)132 ktime_get_real(void)
133 {
134 struct timespec ts;
135
136 nanotime(&ts);
137
138 return timespec_to_ktime(ts);
139 }
140
141 static inline ktime_t
ktime_get_boottime(void)142 ktime_get_boottime(void)
143 {
144 /* XXX include time spent in suspend */
145 return ktime_get();
146 }
147
148 static inline ktime_t
ktime_get_raw(void)149 ktime_get_raw(void)
150 {
151 /* XXX */
152 return ktime_get();
153 }
154
155 static inline uint64_t
ktime_get_ns(void)156 ktime_get_ns(void)
157 {
158 return ktime_to_ns(ktime_get());
159 }
160
161 static inline uint64_t
ktime_get_raw_ns(void)162 ktime_get_raw_ns(void)
163 {
164 return ktime_to_ns(ktime_get_raw());
165 }
166
167 static inline uint64_t
ktime_get_mono_fast_ns(void)168 ktime_get_mono_fast_ns(void)
169 {
170 return ktime_get_raw_ns();
171 }
172
173 static inline ktime_t
ktime_get_monotonic_offset(void)174 ktime_get_monotonic_offset(void)
175 {
176 struct timespec ts;
177
178 getnanoboottime(&ts);
179
180 return timespec_to_ktime(ts);
181 }
182
183 static inline ktime_t
ktime_mono_to_real(ktime_t kt)184 ktime_mono_to_real(ktime_t kt)
185 {
186 struct timespec ts = ktime_to_timespec(kt);
187 struct timespec bts;
188
189 getnanoboottime(&bts);
190 timespecadd(&ts, &bts, &ts);
191
192 return timespec_to_ktime(ts);
193 }
194
195 static inline int64_t
ktime_us_delta(ktime_t a,ktime_t b)196 ktime_us_delta(ktime_t a, ktime_t b)
197 {
198 return ktime_to_us(ktime_sub(a, b));
199 }
200
201 static inline int64_t
ktime_ms_delta(ktime_t a,ktime_t b)202 ktime_ms_delta(ktime_t a, ktime_t b)
203 {
204 return ktime_to_ms(ktime_sub(a, b));
205 }
206
207
208 static inline bool
time_in_range(unsigned long x,unsigned long a,unsigned long b)209 time_in_range(unsigned long x, unsigned long a, unsigned long b)
210 {
211 return ((a <= x) && (x <= b));
212 }
213
214 static inline bool
ktime_after(ktime_t a,ktime_t b)215 ktime_after(ktime_t a, ktime_t b)
216 {
217 return ktime_to_ns(a) > ktime_to_ns(b);
218 }
219
220 static inline time_t
ktime_get_real_seconds(void)221 ktime_get_real_seconds(void)
222 {
223 return time_second;
224 }
225
226 static inline void
ktime_get_ts64(struct timespec64 * ts)227 ktime_get_ts64(struct timespec64 *ts)
228 {
229
230 nanotime(ts);
231 }
232
233 #endif /* _LINUX_KTIME_H_ */
234