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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