2 * Copyright (c) 2014-2020 François Tigeot <ftigeot@wolfpond.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice unmodified, this list of conditions, and the following
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #ifndef _LINUX_JIFFIES_H_
28 #define _LINUX_JIFFIES_H_
30 #include <sys/kernel.h>
31 #include <machine/limits.h>
33 #include <linux/math64.h>
34 #include <linux/time.h>
38 #define MAX_JIFFY_OFFSET ((LONG_MAX >> 1) - 1)
40 #define jiffies_to_msecs(x) (((int64_t)(x)) * 1000 / hz)
41 #define msecs_to_jiffies(x) (((int64_t)(x)) * hz / 1000)
43 #define jiffies_64 ticks /* XXX hmmm */
44 #define time_after(a,b) ((long)(b) - (long)(a) < 0)
45 #define time_after_eq(a,b) ((long)(b) - (long)(a) <= 0)
47 #define time_before(a,b) time_after(b,a)
48 #define time_before_eq(a,b) time_after_eq(b,a)
50 #define time_in_range(a,b,c) \
51 time_after_eq(a,b) && time_before_eq(a,c)
53 static inline unsigned long
54 timespec_to_jiffies(const struct timespec
*ts
)
58 result
= ((unsigned long)hz
* ts
->tv_sec
) + (ts
->tv_nsec
/ NSEC_PER_SEC
);
59 if (result
> LONG_MAX
)
66 unsigned long usecs_to_jiffies(const unsigned int u
)
68 unsigned long jiffies
;
70 jiffies
= (u
* hz
) / 1000000;
77 static inline u64
get_jiffies_64(void)
82 static inline u64
nsecs_to_jiffies(u64 n
)
84 return (n
* hz
) / NSEC_PER_SEC
;
87 static inline u64
nsecs_to_jiffies64(u64 n
)
89 return nsecs_to_jiffies(n
);
93 unsigned int jiffies_to_usecs(const unsigned long j
)
95 return j
* (USEC_PER_SEC
/ HZ
);
99 jiffies_to_nsecs(const unsigned long j
)
101 return j
* (NSEC_PER_SEC
/ HZ
);
104 #endif /* _LINUX_JIFFIES_H_ */