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/libcfs_time.h
31 *
32 * Time functions.
33 *
34 */
35
36 #ifndef __LIBCFS_TIME_H__
37 #define __LIBCFS_TIME_H__
38 /*
39 * generic time manipulation functions.
40 */
41
cfs_time_add(unsigned long t,long d)42 static inline unsigned long cfs_time_add(unsigned long t, long d)
43 {
44 return (unsigned long)(t + d);
45 }
46
cfs_time_sub(unsigned long t1,unsigned long t2)47 static inline unsigned long cfs_time_sub(unsigned long t1, unsigned long t2)
48 {
49 return (unsigned long)(t1 - t2);
50 }
51
cfs_time_after(unsigned long t1,unsigned long t2)52 static inline int cfs_time_after(unsigned long t1, unsigned long t2)
53 {
54 return time_before(t2, t1);
55 }
56
cfs_time_aftereq(unsigned long t1,unsigned long t2)57 static inline int cfs_time_aftereq(unsigned long t1, unsigned long t2)
58 {
59 return time_before_eq(t2, t1);
60 }
61
cfs_time_shift(int seconds)62 static inline unsigned long cfs_time_shift(int seconds)
63 {
64 return cfs_time_add(cfs_time_current(), cfs_time_seconds(seconds));
65 }
66
67 /*
68 * return valid time-out based on user supplied one. Currently we only check
69 * that time-out is not shorted than allowed.
70 */
cfs_timeout_cap(long timeout)71 static inline long cfs_timeout_cap(long timeout)
72 {
73 if (timeout < CFS_TICK)
74 timeout = CFS_TICK;
75 return timeout;
76 }
77
78 #endif
79