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ktime.h revision 1.5
      1  1.4  riastrad /*	$NetBSD: ktime.h,v 1.5 2018/08/27 07:05:00 riastradh Exp $	*/
      2  1.2  riastrad 
      3  1.2  riastrad /*-
      4  1.2  riastrad  * Copyright (c) 2013 The NetBSD Foundation, Inc.
      5  1.2  riastrad  * All rights reserved.
      6  1.2  riastrad  *
      7  1.2  riastrad  * This code is derived from software contributed to The NetBSD Foundation
      8  1.2  riastrad  * by Taylor R. Campbell.
      9  1.2  riastrad  *
     10  1.2  riastrad  * Redistribution and use in source and binary forms, with or without
     11  1.2  riastrad  * modification, are permitted provided that the following conditions
     12  1.2  riastrad  * are met:
     13  1.2  riastrad  * 1. Redistributions of source code must retain the above copyright
     14  1.2  riastrad  *    notice, this list of conditions and the following disclaimer.
     15  1.2  riastrad  * 2. Redistributions in binary form must reproduce the above copyright
     16  1.2  riastrad  *    notice, this list of conditions and the following disclaimer in the
     17  1.2  riastrad  *    documentation and/or other materials provided with the distribution.
     18  1.2  riastrad  *
     19  1.2  riastrad  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     20  1.2  riastrad  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     21  1.2  riastrad  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     22  1.2  riastrad  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     23  1.2  riastrad  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     24  1.2  riastrad  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     25  1.2  riastrad  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     26  1.2  riastrad  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     27  1.2  riastrad  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     28  1.2  riastrad  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     29  1.2  riastrad  * POSSIBILITY OF SUCH DAMAGE.
     30  1.2  riastrad  */
     31  1.2  riastrad 
     32  1.2  riastrad #ifndef _LINUX_KTIME_H_
     33  1.2  riastrad #define _LINUX_KTIME_H_
     34  1.2  riastrad 
     35  1.2  riastrad #include <sys/types.h>
     36  1.2  riastrad #include <sys/endian.h>
     37  1.2  riastrad #include <sys/time.h>
     38  1.2  riastrad 
     39  1.3  riastrad #include <linux/time.h>
     40  1.3  riastrad 
     41  1.2  riastrad union ktime {
     42  1.2  riastrad 	int64_t kt_nsec;
     43  1.2  riastrad 	struct {
     44  1.2  riastrad #if _BYTE_ORDER == _BIG_ENDIAN
     45  1.2  riastrad 		int32_t ktsn_sec;
     46  1.2  riastrad 		int32_t ktsn_nsec;
     47  1.2  riastrad #else
     48  1.2  riastrad 		int32_t ktsn_nsec;
     49  1.2  riastrad 		int32_t ktsn_sec;
     50  1.2  riastrad #endif
     51  1.2  riastrad 	} kt_sec_nsec;
     52  1.2  riastrad };
     53  1.2  riastrad 
     54  1.2  riastrad typedef union ktime ktime_t;
     55  1.2  riastrad 
     56  1.3  riastrad static inline ktime_t
     57  1.3  riastrad ktime_add_ns(ktime_t kt, int64_t nsec)
     58  1.3  riastrad {
     59  1.3  riastrad 	return (ktime_t) { .kt_nsec = (kt.kt_nsec + nsec) };
     60  1.3  riastrad }
     61  1.3  riastrad 
     62  1.2  riastrad static inline int64_t
     63  1.2  riastrad ktime_to_ns(ktime_t kt)
     64  1.2  riastrad {
     65  1.2  riastrad 	return kt.kt_nsec;
     66  1.2  riastrad }
     67  1.2  riastrad 
     68  1.2  riastrad static inline ktime_t
     69  1.2  riastrad ns_to_ktime(int64_t nsec)
     70  1.2  riastrad {
     71  1.2  riastrad 	ktime_t kt;
     72  1.2  riastrad 
     73  1.2  riastrad 	kt.kt_nsec = nsec;
     74  1.2  riastrad 
     75  1.2  riastrad 	return kt;
     76  1.2  riastrad }
     77  1.2  riastrad 
     78  1.2  riastrad static inline ktime_t
     79  1.2  riastrad ktime_sub(ktime_t a, ktime_t b)
     80  1.2  riastrad {
     81  1.2  riastrad 	return ns_to_ktime(ktime_to_ns(a) - ktime_to_ns(b));
     82  1.2  riastrad }
     83  1.2  riastrad 
     84  1.2  riastrad static inline ktime_t
     85  1.2  riastrad ktime_sub_ns(ktime_t a, int64_t nsec)
     86  1.2  riastrad {
     87  1.2  riastrad 	return ns_to_ktime(ktime_to_ns(a) - nsec);
     88  1.2  riastrad }
     89  1.2  riastrad 
     90  1.2  riastrad static inline struct timespec
     91  1.2  riastrad ktime_to_timespec(ktime_t kt)
     92  1.2  riastrad {
     93  1.2  riastrad 	return ns_to_timespec(ktime_to_ns(kt));
     94  1.2  riastrad }
     95  1.2  riastrad 
     96  1.2  riastrad static inline struct timeval
     97  1.2  riastrad ktime_to_timeval(ktime_t kt)
     98  1.2  riastrad {
     99  1.2  riastrad 	return ns_to_timeval(ktime_to_ns(kt));
    100  1.2  riastrad }
    101  1.2  riastrad 
    102  1.2  riastrad static inline ktime_t
    103  1.4  riastrad timespec_to_ktime(struct timespec ts)
    104  1.4  riastrad {
    105  1.4  riastrad 	return ns_to_ktime(1000000000*ts.tv_sec + ts.tv_nsec);
    106  1.4  riastrad }
    107  1.4  riastrad 
    108  1.4  riastrad static inline ktime_t
    109  1.2  riastrad ktime_get(void)
    110  1.2  riastrad {
    111  1.2  riastrad 	struct timespec ts;
    112  1.2  riastrad 	ktime_t kt;
    113  1.2  riastrad 
    114  1.2  riastrad 	nanouptime(&ts);
    115  1.2  riastrad 
    116  1.2  riastrad 	/* XXX Silently truncate?  */
    117  1.2  riastrad 	kt.kt_sec_nsec.ktsn_sec = ts.tv_sec & 0xffffffffUL;
    118  1.2  riastrad 	kt.kt_sec_nsec.ktsn_nsec = ts.tv_nsec;
    119  1.2  riastrad 
    120  1.2  riastrad 	return kt;
    121  1.2  riastrad }
    122  1.2  riastrad 
    123  1.2  riastrad static inline ktime_t
    124  1.4  riastrad ktime_get_real(void)
    125  1.4  riastrad {
    126  1.4  riastrad 	struct timespec ts;
    127  1.4  riastrad 	ktime_t kt;
    128  1.4  riastrad 
    129  1.4  riastrad 	nanotime(&ts);
    130  1.4  riastrad 
    131  1.4  riastrad 	/* XXX Silently truncate?  */
    132  1.4  riastrad 	kt.kt_sec_nsec.ktsn_sec = ts.tv_sec & 0xffffffffUL;
    133  1.4  riastrad 	kt.kt_sec_nsec.ktsn_nsec = ts.tv_nsec;
    134  1.4  riastrad 
    135  1.4  riastrad 	return kt;
    136  1.4  riastrad }
    137  1.4  riastrad 
    138  1.5  riastrad static inline uint64_t
    139  1.5  riastrad ktime_get_raw_ns(void)
    140  1.5  riastrad {
    141  1.5  riastrad 
    142  1.5  riastrad 	/* XXX */
    143  1.5  riastrad 	return ktime_to_ns(ktime_get());
    144  1.5  riastrad }
    145  1.5  riastrad 
    146  1.4  riastrad static inline ktime_t
    147  1.2  riastrad ktime_get_monotonic_offset(void)
    148  1.2  riastrad {
    149  1.4  riastrad 	return timespec_to_ktime(boottime);
    150  1.4  riastrad }
    151  1.4  riastrad 
    152  1.4  riastrad static inline ktime_t
    153  1.4  riastrad ktime_mono_to_real(ktime_t kt)
    154  1.4  riastrad {
    155  1.4  riastrad 	struct timespec ts = ktime_to_timespec(kt);
    156  1.4  riastrad 
    157  1.4  riastrad 	timespecadd(&ts, &boottime, &ts);
    158  1.4  riastrad 
    159  1.4  riastrad 	return timespec_to_ktime(ts);
    160  1.2  riastrad }
    161  1.2  riastrad 
    162  1.3  riastrad static inline bool
    163  1.3  riastrad time_in_range(unsigned long x, unsigned long a, unsigned long b)
    164  1.3  riastrad {
    165  1.3  riastrad 	return ((a <= x) && (x <= b));
    166  1.3  riastrad }
    167  1.3  riastrad 
    168  1.2  riastrad #endif  /* _LINUX_KTIME_H_ */
    169