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/*
* GPL HEADER START
*
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 only,
* as published by the Free Software Foundation.
*
* This program 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 version 2 for more details (a copy is included
* in the LICENSE file that accompanied this code).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this program; If not, see
* http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
* GPL HEADER END
*/
/*
* Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
* Lustre is a trademark of Sun Microsystems, Inc.
*
* libcfs/include/libcfs/linux/linux-time.h
*
* Implementation of portable time API for Linux (kernel and user-level).
*
* Author: Nikita Danilov <nikita@clusterfs.com>
*/
#ifndef __LIBCFS_LINUX_LINUX_TIME_H__
#define __LIBCFS_LINUX_LINUX_TIME_H__
#ifndef __LIBCFS_LIBCFS_H__
#error Do not #include this file directly. #include <linux/libcfs/libcfs.h> instead
#endif
/* Portable time API */
/*
* Platform provides three opaque data-types:
*
* unsigned long 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
*
* struct timespec represents instance in world-visible time. This is
* used in file-system time-stamps
*
* unsigned long cfs_time_current(void);
* unsigned long cfs_time_add (unsigned long, cfs_duration_t);
* cfs_duration_t cfs_time_sub (unsigned long, unsigned long);
* int cfs_impl_time_before (unsigned long, unsigned long);
* int cfs_impl_time_before_eq(unsigned long, unsigned long);
*
* 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_fs_time_current(struct timespec *);
* time_t cfs_fs_time_sec (struct timespec *);
* void cfs_fs_time_usec (struct timespec *, struct timeval *);
*
* CFS_TIME_FORMAT
* CFS_DURATION_FORMAT
*
*/
#define ONE_BILLION ((u_int64_t)1000000000)
#define ONE_MILLION 1000000
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/time.h>
#include <asm/div64.h>
#include "portals_compat25.h"
/*
* post 2.5 kernels.
*/
#include <linux/jiffies.h>
static inline void cfs_fs_time_usec(struct timespec *t, struct timeval *v)
{
v->tv_sec = t->tv_sec;
v->tv_usec = t->tv_nsec / 1000;
}
/*
* Generic kernel stuff
*/
typedef long cfs_duration_t;
static inline int cfs_time_before(unsigned long t1, unsigned long t2)
{
return time_before(t1, t2);
}
static inline unsigned long cfs_time_current(void)
{
return jiffies;
}
static inline void cfs_fs_time_current(struct timespec *t)
{
*t = CURRENT_TIME;
}
static inline time_t cfs_fs_time_sec(struct timespec *t)
{
return t->tv_sec;
}
static inline cfs_duration_t cfs_time_seconds(int seconds)
{
return ((cfs_duration_t)seconds) * HZ;
}
static inline time_t cfs_duration_sec(cfs_duration_t d)
{
return d / HZ;
}
static inline void cfs_duration_usec(cfs_duration_t d, struct timeval *s)
{
#if (BITS_PER_LONG == 32) && (HZ > 4096)
__u64 t;
s->tv_sec = d / HZ;
t = (d - (cfs_duration_t)s->tv_sec * HZ) * ONE_MILLION;
do_div(t, HZ);
s->tv_usec = t;
#else
s->tv_sec = d / HZ;
s->tv_usec = ((d - (cfs_duration_t)s->tv_sec * HZ) * \
ONE_MILLION) / HZ;
#endif
}
#define cfs_time_current_64 get_jiffies_64
static inline __u64 cfs_time_add_64(__u64 t, __u64 d)
{
return t + d;
}
static inline __u64 cfs_time_shift_64(int seconds)
{
return cfs_time_add_64(cfs_time_current_64(),
cfs_time_seconds(seconds));
}
static inline int cfs_time_before_64(__u64 t1, __u64 t2)
{
return (__s64)t2 - (__s64)t1 > 0;
}
static inline int cfs_time_beforeq_64(__u64 t1, __u64 t2)
{
return (__s64)t2 - (__s64)t1 >= 0;
}
/*
* One jiffy
*/
#define CFS_TICK (1)
#define CFS_TIME_T "%lu"
#define CFS_DURATION_T "%ld"
#endif /* __LIBCFS_LINUX_LINUX_TIME_H__ */
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