1 | /* $NetBSD: ktime.h,v 1.3 2014/07/16 20:56:25 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/time.h> |
38 | |
39 | #include <linux/time.h> |
40 | |
41 | union ktime { |
42 | int64_t kt_nsec; |
43 | struct { |
44 | #if _BYTE_ORDER == _BIG_ENDIAN |
45 | int32_t ktsn_sec; |
46 | int32_t ktsn_nsec; |
47 | #else |
48 | int32_t ktsn_nsec; |
49 | int32_t ktsn_sec; |
50 | #endif |
51 | } kt_sec_nsec; |
52 | }; |
53 | |
54 | typedef union ktime ktime_t; |
55 | |
56 | static inline ktime_t |
57 | ktime_add_ns(ktime_t kt, int64_t nsec) |
58 | { |
59 | return (ktime_t) { .kt_nsec = (kt.kt_nsec + nsec) }; |
60 | } |
61 | |
62 | static inline int64_t |
63 | ktime_to_ns(ktime_t kt) |
64 | { |
65 | return kt.kt_nsec; |
66 | } |
67 | |
68 | static inline ktime_t |
69 | ns_to_ktime(int64_t nsec) |
70 | { |
71 | ktime_t kt; |
72 | |
73 | kt.kt_nsec = nsec; |
74 | |
75 | return kt; |
76 | } |
77 | |
78 | static inline ktime_t |
79 | ktime_sub(ktime_t a, ktime_t b) |
80 | { |
81 | return ns_to_ktime(ktime_to_ns(a) - ktime_to_ns(b)); |
82 | } |
83 | |
84 | static inline ktime_t |
85 | ktime_sub_ns(ktime_t a, int64_t nsec) |
86 | { |
87 | return ns_to_ktime(ktime_to_ns(a) - nsec); |
88 | } |
89 | |
90 | static inline struct timespec |
91 | ktime_to_timespec(ktime_t kt) |
92 | { |
93 | return ns_to_timespec(ktime_to_ns(kt)); |
94 | } |
95 | |
96 | static inline struct timeval |
97 | ktime_to_timeval(ktime_t kt) |
98 | { |
99 | return ns_to_timeval(ktime_to_ns(kt)); |
100 | } |
101 | |
102 | static inline ktime_t |
103 | ktime_get(void) |
104 | { |
105 | struct timespec ts; |
106 | ktime_t kt; |
107 | |
108 | /* XXX nanotime or nanouptime? */ |
109 | nanouptime(&ts); |
110 | |
111 | /* XXX Silently truncate? */ |
112 | kt.kt_sec_nsec.ktsn_sec = ts.tv_sec & 0xffffffffUL; |
113 | kt.kt_sec_nsec.ktsn_nsec = ts.tv_nsec; |
114 | |
115 | return kt; |
116 | } |
117 | |
118 | static inline ktime_t |
119 | ktime_get_monotonic_offset(void) |
120 | { |
121 | return ns_to_ktime(0); /* XXX Obviously wrong! Revisit. */ |
122 | } |
123 | |
124 | static inline bool |
125 | time_in_range(unsigned long x, unsigned long a, unsigned long b) |
126 | { |
127 | return ((a <= x) && (x <= b)); |
128 | } |
129 | |
130 | #endif /* _LINUX_KTIME_H_ */ |
131 | |