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131 lines
3.1 KiB
C
131 lines
3.1 KiB
C
/* $NetBSD: ktime.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $ */
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/*-
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* Copyright (c) 2013 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Taylor R. Campbell.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef _LINUX_KTIME_H_
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#define _LINUX_KTIME_H_
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#include <sys/types.h>
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#include <sys/endian.h>
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#include <sys/time.h>
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#include <linux/time.h>
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union ktime {
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int64_t kt_nsec;
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struct {
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#if _BYTE_ORDER == _BIG_ENDIAN
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int32_t ktsn_sec;
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int32_t ktsn_nsec;
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#else
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int32_t ktsn_nsec;
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int32_t ktsn_sec;
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#endif
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} kt_sec_nsec;
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};
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typedef union ktime ktime_t;
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static inline ktime_t
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ktime_add_ns(ktime_t kt, int64_t nsec)
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{
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return (ktime_t) { .kt_nsec = (kt.kt_nsec + nsec) };
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}
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static inline int64_t
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ktime_to_ns(ktime_t kt)
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{
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return kt.kt_nsec;
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}
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static inline ktime_t
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ns_to_ktime(int64_t nsec)
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{
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ktime_t kt;
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kt.kt_nsec = nsec;
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return kt;
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}
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static inline ktime_t
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ktime_sub(ktime_t a, ktime_t b)
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{
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return ns_to_ktime(ktime_to_ns(a) - ktime_to_ns(b));
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}
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static inline ktime_t
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ktime_sub_ns(ktime_t a, int64_t nsec)
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{
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return ns_to_ktime(ktime_to_ns(a) - nsec);
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}
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static inline struct timespec
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ktime_to_timespec(ktime_t kt)
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{
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return ns_to_timespec(ktime_to_ns(kt));
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}
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static inline struct timeval
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ktime_to_timeval(ktime_t kt)
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{
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return ns_to_timeval(ktime_to_ns(kt));
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}
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static inline ktime_t
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ktime_get(void)
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{
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struct timespec ts;
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ktime_t kt;
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/* XXX nanotime or nanouptime? */
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nanouptime(&ts);
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/* XXX Silently truncate? */
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kt.kt_sec_nsec.ktsn_sec = ts.tv_sec & 0xffffffffUL;
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kt.kt_sec_nsec.ktsn_nsec = ts.tv_nsec;
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return kt;
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}
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static inline ktime_t
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ktime_get_monotonic_offset(void)
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{
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return ns_to_ktime(0); /* XXX Obviously wrong! Revisit. */
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}
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static inline bool
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time_in_range(unsigned long x, unsigned long a, unsigned long b)
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{
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return ((a <= x) && (x <= b));
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}
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#endif /* _LINUX_KTIME_H_ */
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