diff options
Diffstat (limited to 'drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h')
-rw-r--r-- | drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h | 144 |
1 files changed, 144 insertions, 0 deletions
diff --git a/drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h b/drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h new file mode 100644 index 000000000..0fc490bac --- /dev/null +++ b/drivers/staging/lustre/include/linux/libcfs/linux/linux-time.h @@ -0,0 +1,144 @@ +/* + * 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 + +#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> + +/* + * 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 + */ + +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 long cfs_time_seconds(int seconds) +{ + return ((long)seconds) * HZ; +} + +static inline time_t cfs_duration_sec(long d) +{ + return d / HZ; +} + +static inline void cfs_duration_usec(long d, struct timeval *s) +{ +#if (BITS_PER_LONG == 32) && (HZ > 4096) + __u64 t; + + s->tv_sec = d / HZ; + t = (d - (long)s->tv_sec * HZ) * ONE_MILLION; + do_div(t, HZ); + s->tv_usec = t; +#else + s->tv_sec = d / HZ; + s->tv_usec = ((d - (long)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__ */ |