1 | /* $NetBSD: jiffies.h,v 1.6 2014/07/26 14:24:08 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_JIFFIES_H_ |
33 | #define _LINUX_JIFFIES_H_ |
34 | |
35 | #include <sys/param.h> |
36 | #include <sys/kernel.h> |
37 | |
38 | #define jiffies hardclock_ticks |
39 | #define jiffies_64 hardclock_ticks /* XXX */ |
40 | |
41 | /* XXX Er, what? */ |
42 | #define MAX_JIFFY_OFFSET ((INT_MAX >> 1) - 1) |
43 | |
44 | static inline unsigned int |
45 | msecs_to_jiffies(unsigned int msec) |
46 | { |
47 | return mstohz(msec); |
48 | } |
49 | |
50 | static inline unsigned int |
51 | jiffies_to_msecs(unsigned int j) |
52 | { |
53 | return hztoms(j); |
54 | } |
55 | |
56 | static inline unsigned int |
57 | usecs_to_jiffies(unsigned int usec) |
58 | { |
59 | const struct timeval tv = { |
60 | .tv_sec = usec / 1000000, |
61 | .tv_usec = usec % 1000000, |
62 | }; |
63 | |
64 | return tvtohz(&tv); |
65 | } |
66 | |
67 | static inline unsigned int |
68 | timespec_to_jiffies(const struct timespec *ts) |
69 | { |
70 | return tstohz(ts); |
71 | } |
72 | |
73 | /* XXX long is the wrong type here times... */ |
74 | |
75 | #define __linux_time_compare(A, OP, B) (((long)(A) - (long)(B)) OP 0) |
76 | |
77 | static inline bool |
78 | time_after(unsigned long a, unsigned long b) |
79 | { |
80 | return __linux_time_compare(a, >, b); |
81 | } |
82 | |
83 | static inline bool |
84 | time_after_eq(unsigned long a, unsigned long b) |
85 | { |
86 | return __linux_time_compare(a, >=, b); |
87 | } |
88 | |
89 | static inline bool |
90 | time_before(unsigned long a, unsigned long b) |
91 | { |
92 | return __linux_time_compare(a, <, b); |
93 | } |
94 | |
95 | static inline bool |
96 | time_before_eq(unsigned long a, unsigned long b) |
97 | { |
98 | return __linux_time_compare(a, <=, b); |
99 | } |
100 | |
101 | #endif /* _LINUX_JIFFIES_H_ */ |
102 | |