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
msecs_to_jiffies(unsigned int msec)45 msecs_to_jiffies(unsigned int msec)
46 {
47 return mstohz(msec);
48 }
49
50 static inline unsigned int
jiffies_to_msecs(unsigned int j)51 jiffies_to_msecs(unsigned int j)
52 {
53 return hztoms(j);
54 }
55
56 static inline unsigned int
usecs_to_jiffies(unsigned int usec)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
timespec_to_jiffies(const struct timespec * ts)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
time_after(unsigned long a,unsigned long b)78 time_after(unsigned long a, unsigned long b)
79 {
80 return __linux_time_compare(a, >, b);
81 }
82
83 static inline bool
time_after_eq(unsigned long a,unsigned long b)84 time_after_eq(unsigned long a, unsigned long b)
85 {
86 return __linux_time_compare(a, >=, b);
87 }
88
89 static inline bool
time_before(unsigned long a,unsigned long b)90 time_before(unsigned long a, unsigned long b)
91 {
92 return __linux_time_compare(a, <, b);
93 }
94
95 static inline bool
time_before_eq(unsigned long a,unsigned long b)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