ktime.h revision 1.5 1 1.4 riastrad /* $NetBSD: ktime.h,v 1.5 2018/08/27 07:05:00 riastradh Exp $ */
2 1.2 riastrad
3 1.2 riastrad /*-
4 1.2 riastrad * Copyright (c) 2013 The NetBSD Foundation, Inc.
5 1.2 riastrad * All rights reserved.
6 1.2 riastrad *
7 1.2 riastrad * This code is derived from software contributed to The NetBSD Foundation
8 1.2 riastrad * by Taylor R. Campbell.
9 1.2 riastrad *
10 1.2 riastrad * Redistribution and use in source and binary forms, with or without
11 1.2 riastrad * modification, are permitted provided that the following conditions
12 1.2 riastrad * are met:
13 1.2 riastrad * 1. Redistributions of source code must retain the above copyright
14 1.2 riastrad * notice, this list of conditions and the following disclaimer.
15 1.2 riastrad * 2. Redistributions in binary form must reproduce the above copyright
16 1.2 riastrad * notice, this list of conditions and the following disclaimer in the
17 1.2 riastrad * documentation and/or other materials provided with the distribution.
18 1.2 riastrad *
19 1.2 riastrad * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 1.2 riastrad * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 1.2 riastrad * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 1.2 riastrad * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 1.2 riastrad * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 1.2 riastrad * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 1.2 riastrad * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 1.2 riastrad * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 1.2 riastrad * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 1.2 riastrad * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 1.2 riastrad * POSSIBILITY OF SUCH DAMAGE.
30 1.2 riastrad */
31 1.2 riastrad
32 1.2 riastrad #ifndef _LINUX_KTIME_H_
33 1.2 riastrad #define _LINUX_KTIME_H_
34 1.2 riastrad
35 1.2 riastrad #include <sys/types.h>
36 1.2 riastrad #include <sys/endian.h>
37 1.2 riastrad #include <sys/time.h>
38 1.2 riastrad
39 1.3 riastrad #include <linux/time.h>
40 1.3 riastrad
41 1.2 riastrad union ktime {
42 1.2 riastrad int64_t kt_nsec;
43 1.2 riastrad struct {
44 1.2 riastrad #if _BYTE_ORDER == _BIG_ENDIAN
45 1.2 riastrad int32_t ktsn_sec;
46 1.2 riastrad int32_t ktsn_nsec;
47 1.2 riastrad #else
48 1.2 riastrad int32_t ktsn_nsec;
49 1.2 riastrad int32_t ktsn_sec;
50 1.2 riastrad #endif
51 1.2 riastrad } kt_sec_nsec;
52 1.2 riastrad };
53 1.2 riastrad
54 1.2 riastrad typedef union ktime ktime_t;
55 1.2 riastrad
56 1.3 riastrad static inline ktime_t
57 1.3 riastrad ktime_add_ns(ktime_t kt, int64_t nsec)
58 1.3 riastrad {
59 1.3 riastrad return (ktime_t) { .kt_nsec = (kt.kt_nsec + nsec) };
60 1.3 riastrad }
61 1.3 riastrad
62 1.2 riastrad static inline int64_t
63 1.2 riastrad ktime_to_ns(ktime_t kt)
64 1.2 riastrad {
65 1.2 riastrad return kt.kt_nsec;
66 1.2 riastrad }
67 1.2 riastrad
68 1.2 riastrad static inline ktime_t
69 1.2 riastrad ns_to_ktime(int64_t nsec)
70 1.2 riastrad {
71 1.2 riastrad ktime_t kt;
72 1.2 riastrad
73 1.2 riastrad kt.kt_nsec = nsec;
74 1.2 riastrad
75 1.2 riastrad return kt;
76 1.2 riastrad }
77 1.2 riastrad
78 1.2 riastrad static inline ktime_t
79 1.2 riastrad ktime_sub(ktime_t a, ktime_t b)
80 1.2 riastrad {
81 1.2 riastrad return ns_to_ktime(ktime_to_ns(a) - ktime_to_ns(b));
82 1.2 riastrad }
83 1.2 riastrad
84 1.2 riastrad static inline ktime_t
85 1.2 riastrad ktime_sub_ns(ktime_t a, int64_t nsec)
86 1.2 riastrad {
87 1.2 riastrad return ns_to_ktime(ktime_to_ns(a) - nsec);
88 1.2 riastrad }
89 1.2 riastrad
90 1.2 riastrad static inline struct timespec
91 1.2 riastrad ktime_to_timespec(ktime_t kt)
92 1.2 riastrad {
93 1.2 riastrad return ns_to_timespec(ktime_to_ns(kt));
94 1.2 riastrad }
95 1.2 riastrad
96 1.2 riastrad static inline struct timeval
97 1.2 riastrad ktime_to_timeval(ktime_t kt)
98 1.2 riastrad {
99 1.2 riastrad return ns_to_timeval(ktime_to_ns(kt));
100 1.2 riastrad }
101 1.2 riastrad
102 1.2 riastrad static inline ktime_t
103 1.4 riastrad timespec_to_ktime(struct timespec ts)
104 1.4 riastrad {
105 1.4 riastrad return ns_to_ktime(1000000000*ts.tv_sec + ts.tv_nsec);
106 1.4 riastrad }
107 1.4 riastrad
108 1.4 riastrad static inline ktime_t
109 1.2 riastrad ktime_get(void)
110 1.2 riastrad {
111 1.2 riastrad struct timespec ts;
112 1.2 riastrad ktime_t kt;
113 1.2 riastrad
114 1.2 riastrad nanouptime(&ts);
115 1.2 riastrad
116 1.2 riastrad /* XXX Silently truncate? */
117 1.2 riastrad kt.kt_sec_nsec.ktsn_sec = ts.tv_sec & 0xffffffffUL;
118 1.2 riastrad kt.kt_sec_nsec.ktsn_nsec = ts.tv_nsec;
119 1.2 riastrad
120 1.2 riastrad return kt;
121 1.2 riastrad }
122 1.2 riastrad
123 1.2 riastrad static inline ktime_t
124 1.4 riastrad ktime_get_real(void)
125 1.4 riastrad {
126 1.4 riastrad struct timespec ts;
127 1.4 riastrad ktime_t kt;
128 1.4 riastrad
129 1.4 riastrad nanotime(&ts);
130 1.4 riastrad
131 1.4 riastrad /* XXX Silently truncate? */
132 1.4 riastrad kt.kt_sec_nsec.ktsn_sec = ts.tv_sec & 0xffffffffUL;
133 1.4 riastrad kt.kt_sec_nsec.ktsn_nsec = ts.tv_nsec;
134 1.4 riastrad
135 1.4 riastrad return kt;
136 1.4 riastrad }
137 1.4 riastrad
138 1.5 riastrad static inline uint64_t
139 1.5 riastrad ktime_get_raw_ns(void)
140 1.5 riastrad {
141 1.5 riastrad
142 1.5 riastrad /* XXX */
143 1.5 riastrad return ktime_to_ns(ktime_get());
144 1.5 riastrad }
145 1.5 riastrad
146 1.4 riastrad static inline ktime_t
147 1.2 riastrad ktime_get_monotonic_offset(void)
148 1.2 riastrad {
149 1.4 riastrad return timespec_to_ktime(boottime);
150 1.4 riastrad }
151 1.4 riastrad
152 1.4 riastrad static inline ktime_t
153 1.4 riastrad ktime_mono_to_real(ktime_t kt)
154 1.4 riastrad {
155 1.4 riastrad struct timespec ts = ktime_to_timespec(kt);
156 1.4 riastrad
157 1.4 riastrad timespecadd(&ts, &boottime, &ts);
158 1.4 riastrad
159 1.4 riastrad return timespec_to_ktime(ts);
160 1.2 riastrad }
161 1.2 riastrad
162 1.3 riastrad static inline bool
163 1.3 riastrad time_in_range(unsigned long x, unsigned long a, unsigned long b)
164 1.3 riastrad {
165 1.3 riastrad return ((a <= x) && (x <= b));
166 1.3 riastrad }
167 1.3 riastrad
168 1.2 riastrad #endif /* _LINUX_KTIME_H_ */
169