/* * 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. * * Copyright (c) 2014, Intel Corporation. */ /* * 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 */ #ifndef __LIBCFS_LINUX_LINUX_TIME_H__ #define __LIBCFS_LINUX_LINUX_TIME_H__ #ifndef __LIBCFS_LIBCFS_H__ #error Do not #include this file directly. #include instead #endif #ifndef __KERNEL__ #error This include is only for kernel use. #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_impl_time_before (cfs_time_t, cfs_time_t); * int cfs_impl_time_before_eq(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 #ifndef __KERNEL__ #error This include is only for kernel use. #endif #include #include #include #include #include /* * post 2.5 kernels. */ #include typedef struct timespec cfs_fs_time_t; static inline void cfs_fs_time_usec(cfs_fs_time_t *t, struct timeval *v) { v->tv_sec = t->tv_sec; v->tv_usec = t->tv_nsec / 1000; } static inline void cfs_fs_time_nsec(cfs_fs_time_t *t, struct timespec *s) { *s = *t; } /* * internal helper function used by cfs_fs_time_before*() */ static inline unsigned long long __cfs_fs_time_flat(cfs_fs_time_t *t) { return (unsigned long long)t->tv_sec * NSEC_PER_SEC + t->tv_nsec; } /* * Generic kernel stuff */ typedef unsigned long cfs_time_t; /* jiffies */ typedef long cfs_duration_t; typedef cycles_t cfs_cycles_t; static inline int cfs_time_before(cfs_time_t t1, cfs_time_t t2) { return time_before(t1, t2); } static inline int cfs_time_beforeq(cfs_time_t t1, cfs_time_t t2) { return time_before_eq(t1, t2); } static inline cfs_time_t cfs_time_current(void) { return jiffies; } static inline time_t cfs_time_current_sec(void) { return get_seconds(); } static inline void cfs_fs_time_current(cfs_fs_time_t *t) { *t = CURRENT_TIME; } static inline time_t cfs_fs_time_sec(cfs_fs_time_t *t) { return t->tv_sec; } 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); } 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); } static inline cfs_duration_t cfs_time_seconds(int seconds) { return ((cfs_duration_t)seconds) * msecs_to_jiffies(MSEC_PER_SEC); } static inline time_t cfs_duration_sec(cfs_duration_t d) { return d / msecs_to_jiffies(MSEC_PER_SEC); } static inline void cfs_duration_usec(cfs_duration_t d, struct timeval *s) { #if (BITS_PER_LONG == 32) if (msecs_to_jiffies(MSEC_PER_SEC) > 4096) { __u64 t; s->tv_sec = d / msecs_to_jiffies(MSEC_PER_SEC); t = (d - (cfs_duration_t)s->tv_sec * msecs_to_jiffies(MSEC_PER_SEC)) * USEC_PER_SEC; do_div(t, msecs_to_jiffies(MSEC_PER_SEC)); s->tv_usec = t; } else { s->tv_sec = d / msecs_to_jiffies(MSEC_PER_SEC); s->tv_usec = ((d - (cfs_duration_t)s->tv_sec * msecs_to_jiffies(MSEC_PER_SEC)) * USEC_PER_SEC) / msecs_to_jiffies(MSEC_PER_SEC); } #else s->tv_sec = d / msecs_to_jiffies(MSEC_PER_SEC); s->tv_usec = ((d - (cfs_duration_t)s->tv_sec * msecs_to_jiffies(MSEC_PER_SEC)) * USEC_PER_SEC) / msecs_to_jiffies(MSEC_PER_SEC); #endif } static inline void cfs_duration_nsec(cfs_duration_t d, struct timespec *s) { #if (BITS_PER_LONG == 32) __u64 t; s->tv_sec = d / msecs_to_jiffies(MSEC_PER_SEC); t = (d - s->tv_sec * msecs_to_jiffies(MSEC_PER_SEC)) * NSEC_PER_SEC; do_div(t, msecs_to_jiffies(MSEC_PER_SEC)); s->tv_nsec = t; #else s->tv_sec = d / msecs_to_jiffies(MSEC_PER_SEC); s->tv_nsec = ((d - s->tv_sec * msecs_to_jiffies(MSEC_PER_SEC)) * NSEC_PER_SEC) / msecs_to_jiffies(MSEC_PER_SEC); #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__ */ /* * Local variables: * c-indentation-style: "K&R" * c-basic-offset: 8 * tab-width: 8 * fill-column: 80 * scroll-step: 1 * End: */