/* $NetBSD: ktime.h,v 1.7 2018/08/27 13:57:38 riastradh Exp $ */
/*-
* Copyright (c) 2013 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Taylor R. Campbell.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef _LINUX_KTIME_H_
#define _LINUX_KTIME_H_
#include <sys/types.h>
#include <sys/endian.h>
#include <sys/kernel.h>
#include <sys/time.h>
#include <linux/time.h>
union ktime {
int64_t kt_nsec;
};
typedef union ktime ktime_t;
static inline int64_t
ktime_to_ns(ktime_t kt)
{
return kt.kt_nsec;
}
static inline int64_t
ktime_to_us(ktime_t kt)
{
return ktime_to_ns(kt)/1000;
}
static inline ktime_t
ns_to_ktime(int64_t nsec)
{
return (ktime_t) { .kt_nsec = nsec };
}
static inline ktime_t
ktime_add_ns(ktime_t kt, int64_t nsec)
{
return ns_to_ktime(ktime_to_ns(kt) + nsec);
}
static inline ktime_t
ktime_sub(ktime_t a, ktime_t b)
{
return ns_to_ktime(ktime_to_ns(a) - ktime_to_ns(b));
}
static inline ktime_t
ktime_sub_ns(ktime_t a, int64_t nsec)
{
return ns_to_ktime(ktime_to_ns(a) - nsec);
}
static inline struct timespec
ktime_to_timespec(ktime_t kt)
{
return ns_to_timespec(ktime_to_ns(kt));
}
static inline struct timeval
ktime_to_timeval(ktime_t kt)
{
return ns_to_timeval(ktime_to_ns(kt));
}
static inline ktime_t
timespec_to_ktime(struct timespec ts)
{
/* XXX Silently truncate? */
return ns_to_ktime(1000000000*(int64_t)ts.tv_sec + ts.tv_nsec);
}
static inline ktime_t
ktime_get(void)
{
struct timespec ts;
nanouptime(&ts);
return timespec_to_ktime(ts);
}
static inline ktime_t
ktime_get_real(void)
{
struct timespec ts;
nanotime(&ts);
return timespec_to_ktime(ts);
}
static inline uint64_t
ktime_get_raw_ns(void)
{
/* XXX */
return ktime_to_ns(ktime_get());
}
static inline ktime_t
ktime_get_monotonic_offset(void)
{
return timespec_to_ktime(boottime);
}
static inline ktime_t
ktime_mono_to_real(ktime_t kt)
{
struct timespec ts = ktime_to_timespec(kt);
timespecadd(&ts, &boottime, &ts);
return timespec_to_ktime(ts);
}
static inline int64_t
ktime_us_delta(ktime_t a, ktime_t b)
{
return ktime_to_us(ktime_sub(a, b));
}
static inline bool
time_in_range(unsigned long x, unsigned long a, unsigned long b)
{
return ((a <= x) && (x <= b));
}
#endif /* _LINUX_KTIME_H_ */