FreeBSD/Linux Kernel Cross Reference
sys/contrib/openzfs/include/os/freebsd/spl/sys/time.h

     /*
      * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
      * All rights reserved.
      *
      * 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 AUTHORS 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 AUTHORS 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.
     *
     * $FreeBSD$
     */
    
    #ifndef _OPENSOLARIS_SYS_TIME_H_
    #define _OPENSOLARIS_SYS_TIME_H_
    #pragma once
    #include_next <sys/time.h>
    #include <sys/debug.h>
    #ifndef _SYS_KERNEL_H_
    extern int hz;
    #endif
    
    #define SEC             1
    #define MILLISEC        1000UL
    #define MICROSEC        1000000UL
    #define NANOSEC 1000000000UL
    #define TIME_MAX        LLONG_MAX
    
    #define MSEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MILLISEC))
    #define NSEC2MSEC(n)    ((n) / (NANOSEC / MILLISEC))
    
    #define USEC2NSEC(m)    ((hrtime_t)(m) * (NANOSEC / MICROSEC))
    #define NSEC2USEC(n)    ((n) / (NANOSEC / MICROSEC))
    
    #define NSEC2SEC(n)     ((n) / (NANOSEC / SEC))
    #define SEC2NSEC(m)     ((hrtime_t)(m) * (NANOSEC / SEC))
    
    typedef longlong_t      hrtime_t;
    
    #if defined(__i386__) || defined(__powerpc__)
    #define TIMESPEC_OVERFLOW(ts)                                           \
            ((ts)->tv_sec < INT32_MIN || (ts)->tv_sec > INT32_MAX)
    #else
    #define TIMESPEC_OVERFLOW(ts)                                           \
            ((ts)->tv_sec < INT64_MIN || (ts)->tv_sec > INT64_MAX)
    #endif
    
    #define SEC_TO_TICK(sec)        ((sec) * hz)
    #define NSEC_TO_TICK(nsec)      ((nsec) / (NANOSEC / hz))
    
    static __inline hrtime_t
    gethrtime(void)
    {
            struct timespec ts;
            hrtime_t nsec;
    
            nanouptime(&ts);
            nsec = ((hrtime_t)ts.tv_sec * NANOSEC) + ts.tv_nsec;
            return (nsec);
    }
    
    #define gethrestime_sec()       (time_second)
    #define gethrestime(ts)         getnanotime(ts)
    #define gethrtime_waitfree()    gethrtime()
    
    extern int nsec_per_tick;       /* nanoseconds per clock tick */
    
    #define ddi_get_lbolt64()                               \
            (int64_t)(((getsbinuptime() >> 16) * hz) >> 16)
    #define ddi_get_lbolt()         (clock_t)ddi_get_lbolt64()
    
    #else
    
    static __inline hrtime_t
    gethrtime(void)
    {
            struct timespec ts;
            clock_gettime(CLOCK_UPTIME, &ts);
            return (((u_int64_t)ts.tv_sec) * NANOSEC + ts.tv_nsec);
    }
    #endif  /* !_OPENSOLARIS_SYS_TIME_H_ */

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