1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 */
30 /*
31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
33 *
34 * libcfs/include/libcfs/linux/linux-time.h
35 *
36 * Implementation of portable time API for Linux (kernel and user-level).
37 *
38 * Author: Nikita Danilov <nikita@clusterfs.com>
39 */
40
41 #ifndef __LIBCFS_LINUX_LINUX_TIME_H__
42 #define __LIBCFS_LINUX_LINUX_TIME_H__
43
44 #ifndef __LIBCFS_LIBCFS_H__
45 #error Do not #include this file directly. #include <linux/libcfs/libcfs.h> instead
46 #endif
47
48 #define ONE_BILLION ((u_int64_t)1000000000)
49 #define ONE_MILLION 1000000
50
51 #include <linux/module.h>
52 #include <linux/kernel.h>
53 #include <linux/time.h>
54 #include <asm/div64.h>
55
56 /*
57 * post 2.5 kernels.
58 */
59
60 #include <linux/jiffies.h>
61
62 /*
63 * Generic kernel stuff
64 */
65
cfs_time_current(void)66 static inline unsigned long cfs_time_current(void)
67 {
68 return jiffies;
69 }
70
cfs_time_seconds(int seconds)71 static inline long cfs_time_seconds(int seconds)
72 {
73 return ((long)seconds) * HZ;
74 }
75
cfs_duration_sec(long d)76 static inline long cfs_duration_sec(long d)
77 {
78 return d / HZ;
79 }
80
81 #define cfs_time_current_64 get_jiffies_64
82
cfs_time_add_64(__u64 t,__u64 d)83 static inline __u64 cfs_time_add_64(__u64 t, __u64 d)
84 {
85 return t + d;
86 }
87
cfs_time_shift_64(int seconds)88 static inline __u64 cfs_time_shift_64(int seconds)
89 {
90 return cfs_time_add_64(cfs_time_current_64(),
91 cfs_time_seconds(seconds));
92 }
93
cfs_time_before_64(__u64 t1,__u64 t2)94 static inline int cfs_time_before_64(__u64 t1, __u64 t2)
95 {
96 return (__s64)t2 - (__s64)t1 > 0;
97 }
98
cfs_time_beforeq_64(__u64 t1,__u64 t2)99 static inline int cfs_time_beforeq_64(__u64 t1, __u64 t2)
100 {
101 return (__s64)t2 - (__s64)t1 >= 0;
102 }
103
104 /*
105 * One jiffy
106 */
107 #define CFS_TICK (1)
108
109 #define CFS_DURATION_T "%ld"
110
111 #endif /* __LIBCFS_LINUX_LINUX_TIME_H__ */
112