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d7e09d03 PT |
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 | ||
d7e09d03 PT |
48 | #define ONE_BILLION ((u_int64_t)1000000000) |
49 | #define ONE_MILLION 1000000 | |
50 | ||
d7e09d03 PT |
51 | #include <linux/module.h> |
52 | #include <linux/kernel.h> | |
d7e09d03 PT |
53 | #include <linux/time.h> |
54 | #include <asm/div64.h> | |
55 | ||
d7e09d03 PT |
56 | /* |
57 | * post 2.5 kernels. | |
58 | */ | |
59 | ||
60 | #include <linux/jiffies.h> | |
61 | ||
d7e09d03 | 62 | |
61b3508a | 63 | static inline void cfs_fs_time_usec(struct timespec *t, struct timeval *v) |
d7e09d03 PT |
64 | { |
65 | v->tv_sec = t->tv_sec; | |
66 | v->tv_usec = t->tv_nsec / 1000; | |
67 | } | |
68 | ||
d7e09d03 PT |
69 | /* |
70 | * Generic kernel stuff | |
71 | */ | |
72 | ||
a649ad1d | 73 | static inline unsigned long cfs_time_current(void) |
d7e09d03 PT |
74 | { |
75 | return jiffies; | |
76 | } | |
77 | ||
61b3508a | 78 | static inline void cfs_fs_time_current(struct timespec *t) |
d7e09d03 PT |
79 | { |
80 | *t = CURRENT_TIME; | |
81 | } | |
82 | ||
61b3508a | 83 | static inline time_t cfs_fs_time_sec(struct timespec *t) |
d7e09d03 PT |
84 | { |
85 | return t->tv_sec; | |
86 | } | |
87 | ||
b2d201bd | 88 | static inline long cfs_time_seconds(int seconds) |
d7e09d03 | 89 | { |
b2d201bd | 90 | return ((long)seconds) * HZ; |
d7e09d03 PT |
91 | } |
92 | ||
b2d201bd | 93 | static inline time_t cfs_duration_sec(long d) |
d7e09d03 PT |
94 | { |
95 | return d / HZ; | |
96 | } | |
97 | ||
b2d201bd | 98 | static inline void cfs_duration_usec(long d, struct timeval *s) |
d7e09d03 PT |
99 | { |
100 | #if (BITS_PER_LONG == 32) && (HZ > 4096) | |
101 | __u64 t; | |
102 | ||
103 | s->tv_sec = d / HZ; | |
b2d201bd | 104 | t = (d - (long)s->tv_sec * HZ) * ONE_MILLION; |
d7e09d03 PT |
105 | do_div(t, HZ); |
106 | s->tv_usec = t; | |
107 | #else | |
108 | s->tv_sec = d / HZ; | |
4de8e0d8 | 109 | s->tv_usec = ((d - (long)s->tv_sec * HZ) * ONE_MILLION) / HZ; |
d7e09d03 PT |
110 | #endif |
111 | } | |
112 | ||
d7e09d03 PT |
113 | #define cfs_time_current_64 get_jiffies_64 |
114 | ||
115 | static inline __u64 cfs_time_add_64(__u64 t, __u64 d) | |
116 | { | |
117 | return t + d; | |
118 | } | |
119 | ||
120 | static inline __u64 cfs_time_shift_64(int seconds) | |
121 | { | |
122 | return cfs_time_add_64(cfs_time_current_64(), | |
123 | cfs_time_seconds(seconds)); | |
124 | } | |
125 | ||
126 | static inline int cfs_time_before_64(__u64 t1, __u64 t2) | |
127 | { | |
128 | return (__s64)t2 - (__s64)t1 > 0; | |
129 | } | |
130 | ||
131 | static inline int cfs_time_beforeq_64(__u64 t1, __u64 t2) | |
132 | { | |
133 | return (__s64)t2 - (__s64)t1 >= 0; | |
134 | } | |
135 | ||
d7e09d03 PT |
136 | /* |
137 | * One jiffy | |
138 | */ | |
139 | #define CFS_TICK (1) | |
140 | ||
141 | #define CFS_TIME_T "%lu" | |
142 | #define CFS_DURATION_T "%ld" | |
143 | ||
d7e09d03 | 144 | #endif /* __LIBCFS_LINUX_LINUX_TIME_H__ */ |