+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
- *
- * Copyright (C) 2004 Cluster File Systems, Inc.
- * Author: Nikita Danilov <nikita@clusterfs.com>
- *
- * This file is part of Lustre, http://www.lustre.org.
- *
- * Lustre is free software; you can redistribute it and/or modify it under the
- * terms of version 2 of the GNU General Public License as published by the
- * Free Software Foundation.
- *
- * Lustre is distributed in the hope that it will be useful, but WITHOUT ANY
- * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
- * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
- * details.
- *
- * You should have received a copy of the GNU General Public License along
- * with Lustre; if not, write to the Free Software Foundation, Inc., 675 Mass
- * Ave, Cambridge, MA 02139, USA.
- *
- * Implementation of portable time API for XNU kernel
- *
- */
-
-#ifndef __LIBCFS_DARWIN_DARWIN_TIME_H__
-#define __LIBCFS_DARWIN_DARWIN_TIME_H__
-
-#ifndef __LIBCFS_LIBCFS_H__
-#error Do not #include this file directly. #include <libcfs/libcfs.h> instead
-#endif
-
-/* Portable time API */
-
-/*
- * Platform provides three opaque data-types:
- *
- * cfs_time_t represents point in time. This is internal kernel
- * time rather than "wall clock". This time bears no
- * relation to gettimeofday().
- *
- * cfs_duration_t represents time interval with resolution of internal
- * platform clock
- *
- * cfs_fs_time_t represents instance in world-visible time. This is
- * used in file-system time-stamps
- *
- * cfs_time_t cfs_time_current(void);
- * cfs_time_t cfs_time_add (cfs_time_t, cfs_duration_t);
- * cfs_duration_t cfs_time_sub (cfs_time_t, cfs_time_t);
- * int cfs_time_before (cfs_time_t, cfs_time_t);
- * int cfs_time_beforeq(cfs_time_t, cfs_time_t);
- *
- * cfs_duration_t cfs_duration_build(int64_t);
- *
- * time_t cfs_duration_sec (cfs_duration_t);
- * void cfs_duration_usec(cfs_duration_t, struct timeval *);
- * void cfs_duration_nsec(cfs_duration_t, struct timespec *);
- *
- * void cfs_fs_time_current(cfs_fs_time_t *);
- * time_t cfs_fs_time_sec (cfs_fs_time_t *);
- * void cfs_fs_time_usec (cfs_fs_time_t *, struct timeval *);
- * void cfs_fs_time_nsec (cfs_fs_time_t *, struct timespec *);
- * int cfs_fs_time_before (cfs_fs_time_t *, cfs_fs_time_t *);
- * int cfs_fs_time_beforeq(cfs_fs_time_t *, cfs_fs_time_t *);
- *
- * CFS_TIME_FORMAT
- * CFS_DURATION_FORMAT
- *
- */
-
-#define ONE_BILLION ((u_int64_t)1000000000)
-#define ONE_MILLION 1000000
-
-#ifdef __KERNEL__
-#include <sys/types.h>
-#include <sys/systm.h>
-
-#include <sys/kernel.h>
-
-#include <mach/mach_types.h>
-#include <mach/time_value.h>
-#include <kern/clock.h>
-#include <sys/param.h>
-
-#include <libcfs/darwin/darwin-types.h>
-#include <libcfs/darwin/darwin-utils.h>
-#include <libcfs/darwin/darwin-lock.h>
-
-/*
- * There are three way to measure time in OS X:
- * 1. nanoseconds
- * 2. absolute time (abstime unit equal to the length of one bus cycle),
- * schedule of thread/timer are counted by absolute time, but abstime
- * in different mac can be different also, so we wouldn't use it.
- * 3. clock interval (1sec = 100hz). But clock interval only taken by KPI
- * like tsleep().
- *
- * We use nanoseconds (uptime, not calendar time)
- *
- * clock_get_uptime() :get absolute time since bootup.
- * nanouptime() :get nanoseconds since bootup
- * microuptime() :get microseonds since bootup
- * nanotime() :get nanoseconds since epoch
- * microtime() :get microseconds since epoch
- */
-typedef u_int64_t cfs_time_t; /* nanoseconds */
-typedef int64_t cfs_duration_t;
-
-#define CFS_TIME_T "%llu"
-#define CFS_DURATION_T "%lld"
-
-typedef struct timeval cfs_fs_time_t;
-
-static inline cfs_time_t cfs_time_current(void)
-{
- struct timespec instant;
-
- nanouptime(&instant);
- return ((u_int64_t)instant.tv_sec) * NSEC_PER_SEC + instant.tv_nsec;
-}
-
-static inline time_t cfs_time_current_sec(void)
-{
- struct timespec instant;
-
- nanouptime(&instant);
- return instant.tv_sec;
-}
-
-static inline cfs_time_t cfs_time_add(cfs_time_t t, cfs_duration_t d)
-{
- return t + d;
-}
-
-static inline cfs_duration_t cfs_time_sub(cfs_time_t t1, cfs_time_t t2)
-{
- return t1 - t2;
-}
-
-static inline int cfs_time_before(cfs_time_t t1, cfs_time_t t2)
-{
- return (int64_t)t1 - (int64_t)t2 < 0;
-}
-
-static inline int cfs_time_beforeq(cfs_time_t t1, cfs_time_t t2)
-{
- return (int64_t)t1 - (int64_t)t2 <= 0;
-}
-
-static inline void cfs_fs_time_current(cfs_fs_time_t *t)
-{
- microtime((struct timeval *)t);
-}
-
-static inline time_t cfs_fs_time_sec(cfs_fs_time_t *t)
-{
- return t->tv_sec;
-}
-
-static inline void cfs_fs_time_usec(cfs_fs_time_t *t, struct timeval *v)
-{
- *v = *t;
-}
-
-static inline void cfs_fs_time_nsec(cfs_fs_time_t *t, struct timespec *s)
-{
- s->tv_sec = t->tv_sec;
- s->tv_nsec = t->tv_usec * NSEC_PER_USEC;
-}
-
-static inline cfs_duration_t cfs_time_seconds(int seconds)
-{
- return (NSEC_PER_SEC * (int64_t)seconds);
-}
-
-/*
- * internal helper function used by cfs_fs_time_before*()
- */
-static inline int64_t __cfs_fs_time_flat(cfs_fs_time_t *t)
-{
- return ((int64_t)t->tv_sec)*NSEC_PER_SEC + t->tv_usec*NSEC_PER_USEC;
-}
-
-static inline int cfs_fs_time_before(cfs_fs_time_t *t1, cfs_fs_time_t *t2)
-{
- return __cfs_fs_time_flat(t1) - __cfs_fs_time_flat(t2) < 0;
-}
-
-static inline int cfs_fs_time_beforeq(cfs_fs_time_t *t1, cfs_fs_time_t *t2)
-{
- return __cfs_fs_time_flat(t1) - __cfs_fs_time_flat(t2) <= 0;
-}
-
-static inline time_t cfs_duration_sec(cfs_duration_t d)
-{
- return d / NSEC_PER_SEC;
-}
-
-static inline void cfs_duration_usec(cfs_duration_t d, struct timeval *s)
-{
- s->tv_sec = d / NSEC_PER_SEC;
- s->tv_usec = (d - ((int64_t)s->tv_sec) * NSEC_PER_SEC) / NSEC_PER_USEC;
-}
-
-static inline void cfs_duration_nsec(cfs_duration_t d, struct timespec *s)
-{
- s->tv_sec = d / NSEC_PER_SEC;
- s->tv_nsec = d - ((int64_t)s->tv_sec) * NSEC_PER_SEC;
-}
-
-#define cfs_time_current_64 cfs_time_current
-#define cfs_time_add_64 cfs_time_add
-#define cfs_time_shift_64 cfs_time_shift
-#define cfs_time_before_64 cfs_time_before
-#define cfs_time_beforeq_64 cfs_time_beforeq
-
-/*
- * One jiffy (in nanoseconds)
- *
- * osfmk/kern/sched_prim.c
- * #define DEFAULT_PREEMPTION_RATE 100
- */
-#define CFS_TICK (NSEC_PER_SEC / (u_int64_t)100)
-
-#define LTIME_S(t) (t)
-
-/* __KERNEL__ */
-#else
-
-/*
- * User level
- */
-#include <libcfs/user-time.h>
-
-/* __KERNEL__ */
-#endif
-
-/* __LIBCFS_DARWIN_DARWIN_TIME_H__ */
-#endif
-/*
- * Local variables:
- * c-indentation-style: "K&R"
- * c-basic-offset: 8
- * tab-width: 8
- * fill-column: 80
- * scroll-step: 1
- * End:
- */
git://git.whamcloud.com / fs / lustre-release.git / blobdiff