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.gnu.org/licenses/gpl-2.0.html
19 *
20 * GPL HEADER END
21 */
22 /*
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
25 */
26 /*
27 * This file is part of Lustre, http://www.lustre.org/
28 * Lustre is a trademark of Sun Microsystems, Inc.
29 *
30 * libcfs/include/libcfs/linux/linux-time.h
31 *
32 * Implementation of portable time API for Linux (kernel and user-level).
33 *
34 * Author: Nikita Danilov <nikita@clusterfs.com>
35 */
36
37 #ifndef __LIBCFS_LINUX_LINUX_TIME_H__
38 #define __LIBCFS_LINUX_LINUX_TIME_H__
39
40 #ifndef __LIBCFS_LIBCFS_H__
41 #error Do not #include this file directly. #include <linux/libcfs/libcfs.h> instead
42 #endif
43
44 #define ONE_BILLION ((u_int64_t)1000000000)
45 #define ONE_MILLION 1000000
46
47 #include <linux/module.h>
48 #include <linux/kernel.h>
49 #include <linux/time.h>
50 #include <asm/div64.h>
51
52 /*
53 * post 2.5 kernels.
54 */
55
56 #include <linux/jiffies.h>
57
58 /*
59 * Generic kernel stuff
60 */
61
cfs_time_current(void)62 static inline unsigned long cfs_time_current(void)
63 {
64 return jiffies;
65 }
66
cfs_time_seconds(int seconds)67 static inline long cfs_time_seconds(int seconds)
68 {
69 return ((long)seconds) * msecs_to_jiffies(MSEC_PER_SEC);
70 }
71
cfs_duration_sec(long d)72 static inline long cfs_duration_sec(long d)
73 {
74 return d / msecs_to_jiffies(MSEC_PER_SEC);
75 }
76
77 #define cfs_time_current_64 get_jiffies_64
78
cfs_time_add_64(__u64 t,__u64 d)79 static inline __u64 cfs_time_add_64(__u64 t, __u64 d)
80 {
81 return t + d;
82 }
83
cfs_time_shift_64(int seconds)84 static inline __u64 cfs_time_shift_64(int seconds)
85 {
86 return cfs_time_add_64(cfs_time_current_64(),
87 cfs_time_seconds(seconds));
88 }
89
cfs_time_before_64(__u64 t1,__u64 t2)90 static inline int cfs_time_before_64(__u64 t1, __u64 t2)
91 {
92 return (__s64)t2 - (__s64)t1 > 0;
93 }
94
cfs_time_beforeq_64(__u64 t1,__u64 t2)95 static inline int cfs_time_beforeq_64(__u64 t1, __u64 t2)
96 {
97 return (__s64)t2 - (__s64)t1 >= 0;
98 }
99
100 /*
101 * One jiffy
102 */
103 #define CFS_TICK (1)
104
105 #define CFS_DURATION_T "%ld"
106
107 #endif /* __LIBCFS_LINUX_LINUX_TIME_H__ */
108