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10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
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13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
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21 * CA 95054 USA or visit www.sun.com if you need additional information or
27 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
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31 * This file is part of Lustre, http://www.lustre.org/
32 * Lustre is a trademark of Sun Microsystems, Inc.
34 * libcfs/include/libcfs/user-time.h
36 * Implementation of portable time API for user-level.
38 * Author: Nikita Danilov <nikita@clusterfs.com>
41 #ifndef __LIBCFS_USER_TIME_H__
42 #define __LIBCFS_USER_TIME_H__
44 /* Portable time API */
47 * Platform provides three opaque data-types:
49 * cfs_time_t represents point in time. This is internal kernel
50 * time rather than "wall clock". This time bears no
51 * relation to gettimeofday().
53 * cfs_duration_t represents time interval with resolution of internal
56 * cfs_fs_time_t represents instance in world-visible time. This is
57 * used in file-system time-stamps
59 * cfs_time_t cfs_time_current(void);
60 * cfs_time_t cfs_time_add (cfs_time_t, cfs_duration_t);
61 * cfs_duration_t cfs_time_sub (cfs_time_t, cfs_time_t);
62 * int cfs_time_before (cfs_time_t, cfs_time_t);
63 * int cfs_time_beforeq(cfs_time_t, cfs_time_t);
65 * cfs_duration_t cfs_duration_build(int64_t);
67 * time_t cfs_duration_sec (cfs_duration_t);
68 * void cfs_duration_usec(cfs_duration_t, struct timeval *);
69 * void cfs_duration_nsec(cfs_duration_t, struct timespec *);
71 * void cfs_fs_time_current(cfs_fs_time_t *);
72 * time_t cfs_fs_time_sec (cfs_fs_time_t *);
73 * void cfs_fs_time_usec (cfs_fs_time_t *, struct timeval *);
74 * void cfs_fs_time_nsec (cfs_fs_time_t *, struct timespec *);
75 * int cfs_fs_time_before (cfs_fs_time_t *, cfs_fs_time_t *);
76 * int cfs_fs_time_beforeq(cfs_fs_time_t *, cfs_fs_time_t *);
92 #define ONE_BILLION ((uint64_t)1000000000)
93 #define ONE_MILLION 1000000
96 * Liblustre. time(2) based implementation.
99 typedef time_t cfs_fs_time_t;
100 typedef time_t cfs_time_t;
101 typedef time_t cfs_duration_t;
103 #define cfs_time_before(a, b) ((long)(a) - (long)(b) < 0)
104 #define cfs_time_beforeq(a, b) ((long)(b) - (long)(a) >= 0)
106 static inline cfs_time_t cfs_time_current(void)
111 static inline cfs_duration_t cfs_time_seconds(cfs_time_t seconds)
116 static inline time_t cfs_time_current_sec(void)
118 return cfs_time_seconds(cfs_time_current());
121 static inline cfs_duration_t cfs_duration_build(int64_t nano)
123 return (cfs_duration_t) (nano / ONE_BILLION);
126 static inline time_t cfs_duration_sec(cfs_duration_t d)
131 static inline void cfs_duration_usec(cfs_duration_t d, struct timeval *s)
137 static inline void cfs_duration_nsec(cfs_duration_t d, struct timespec *s)
143 static inline void cfs_fs_time_current(cfs_fs_time_t *t)
148 static inline time_t cfs_fs_time_sec(cfs_fs_time_t *t)
153 static inline void cfs_fs_time_usec(cfs_fs_time_t *t, struct timeval *v)
159 static inline void cfs_fs_time_nsec(cfs_fs_time_t *t, struct timespec *s)
165 static inline int cfs_fs_time_before(cfs_fs_time_t *t1, cfs_fs_time_t *t2)
170 static inline int cfs_fs_time_beforeq(cfs_fs_time_t *t1, cfs_fs_time_t *t2)
177 #define cfs_time_current_64 cfs_time_current
178 #define cfs_time_add_64 cfs_time_add
179 #define cfs_time_shift_64 cfs_time_shift
180 #define cfs_time_before_64 cfs_time_before
181 #define cfs_time_beforeq_64 cfs_time_beforeq
183 /* XXX needs to move to arch specific header or configured */
185 #define CFS_TIME_T "%lu"
188 #define CFS_DURATION_T "%ld"
193 /* __LIBCFS_USER_TIME_H__ */
197 * c-indentation-style: "K&R"