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      1 /*	$NetBSD: time.h,v 1.16 2025/07/24 09:04:56 hans Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2007 Pawel Jakub Dawidek <pjd (at) FreeBSD.org>
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  *
     28  * $FreeBSD: head/sys/cddl/compat/opensolaris/sys/time.h 296530 2016-03-08 18:28:24Z mav $
     29  */
     30 
     31 #ifndef _OPENSOLARIS_SYS_TIME_H_
     32 #define	_OPENSOLARIS_SYS_TIME_H_
     33 
     34 #include_next <sys/time.h>
     35 
     36 #define SEC		1
     37 #define MILLISEC	1000
     38 #define MICROSEC	1000000
     39 #define NANOSEC		1000000000
     40 #define TIME_MAX	LLONG_MAX
     41 
     42 #define	MSEC2NSEC(m)	((hrtime_t)(m) * (NANOSEC / MILLISEC))
     43 #define	NSEC2MSEC(n)	((n) / (NANOSEC / MILLISEC))
     44 
     45 #define	NSEC2SEC(n)	((n) / (NANOSEC / SEC))
     46 #define	SEC2NSEC(m)	((hrtime_t)(m) * (NANOSEC / SEC))
     47 
     48 #ifndef __defined_hr_t
     49 #define __defined_hr_t
     50 typedef longlong_t	hrtime_t;
     51 #endif
     52 
     53 /* FreeBSD i386 and PPC use int32 for time, all else int64 */
     54 #if defined(__FreeBSD__) && (defined(__i386__) || defined(__powerpc__))
     55 #define	TIMESPEC_OVERFLOW(ts)						\
     56 	((ts)->tv_sec < INT32_MIN || (ts)->tv_sec > INT32_MAX)
     57 #else
     58 #define	TIMESPEC_OVERFLOW(ts)						\
     59 	((ts)->tv_sec < INT64_MIN || (ts)->tv_sec > INT64_MAX)
     60 #endif
     61 
     62 #define	SEC_TO_TICK(sec)	((sec) * hz)
     63 #define	NSEC_TO_TICK(nsec)	((nsec) / (NANOSEC / hz))
     64 
     65 #ifdef _KERNEL
     66 
     67 static __inline hrtime_t
     68 gethrtime(void) {
     69 
     70 	struct timespec ts;
     71 	hrtime_t nsec;
     72 
     73 	getnanouptime(&ts);
     74 	nsec = (hrtime_t)ts.tv_sec * NANOSEC + ts.tv_nsec;
     75 	return (nsec);
     76 }
     77 
     78 #define	gethrestime_sec()	(time_second)
     79 #define	gethrestime(ts)		getnanotime(ts)
     80 #define	gethrtime_waitfree()	gethrtime()
     81 
     82 static inline int64_t
     83 ddi_get_lbolt64(void)
     84 {
     85 	struct timespec ts;
     86 	extern int hz;
     87 
     88 	getnanouptime(&ts);
     89 	return (int64_t)(SEC_TO_TICK(ts.tv_sec) + NSEC_TO_TICK(ts.tv_nsec));
     90 }
     91 
     92 #define ddi_get_lbolt()		(clock_t)ddi_get_lbolt64()
     93 
     94 #else
     95 
     96 #ifndef __sun
     97 #ifdef __NetBSD__
     98 int clock_gettime(clockid_t, struct timespec *)
     99     __RENAME(__clock_gettime50);
    100 #endif
    101 #if defined(__linux__) || defined(__GNU__)
    102 #include <time.h>
    103 #endif
    104 
    105 static __inline hrtime_t gethrtime(void) {
    106 	struct timespec ts;
    107 	clock_gettime(CLOCK_REALTIME,&ts);
    108 	return (((u_int64_t) ts.tv_sec) * NANOSEC + ts.tv_nsec);
    109 }
    110 
    111 #define	ddi_get_lbolt()		(gethrtime() >> 23)
    112 #define	ddi_get_lbolt64()	(gethrtime() >> 23)
    113 
    114 #endif	/* __sun */
    115 
    116 #endif	/* _KERNEL */
    117 
    118 #endif	/* !_OPENSOLARIS_SYS_TIME_H_ */
    119