1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
4 * Copyright (C) 2004 Cluster File Systems, Inc.
5 * Author: Nikita Danilov <nikita@clusterfs.com>
7 * This file is part of Lustre, http://www.lustre.org.
9 * Lustre is free software; you can redistribute it and/or modify it under the
10 * terms of version 2 of the GNU General Public License as published by the
11 * Free Software Foundation.
13 * Lustre is distributed in the hope that it will be useful, but WITHOUT ANY
14 * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
15 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
18 * You should have received a copy of the GNU General Public License along
19 * with Lustre; if not, write to the Free Software Foundation, Inc., 675 Mass
20 * Ave, Cambridge, MA 02139, USA.
22 * Implementation of portable time API for user-level.
26 #ifndef __LIBCFS_USER_TIME_H__
27 #define __LIBCFS_USER_TIME_H__
29 #ifndef __LIBCFS_LIBCFS_H__
30 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
33 /* Portable time API */
36 * Platform provides three opaque data-types:
38 * cfs_time_t represents point in time. This is internal kernel
39 * time rather than "wall clock". This time bears no
40 * relation to gettimeofday().
42 * cfs_duration_t represents time interval with resolution of internal
45 * cfs_fs_time_t represents instance in world-visible time. This is
46 * used in file-system time-stamps
48 * cfs_time_t cfs_time_current(void);
49 * cfs_time_t cfs_time_add (cfs_time_t, cfs_duration_t);
50 * cfs_duration_t cfs_time_sub (cfs_time_t, cfs_time_t);
51 * int cfs_time_before (cfs_time_t, cfs_time_t);
52 * int cfs_time_beforeq(cfs_time_t, cfs_time_t);
54 * cfs_duration_t cfs_duration_build(int64_t);
56 * time_t cfs_duration_sec (cfs_duration_t);
57 * void cfs_duration_usec(cfs_duration_t, struct timeval *);
58 * void cfs_duration_nsec(cfs_duration_t, struct timespec *);
60 * void cfs_fs_time_current(cfs_fs_time_t *);
61 * time_t cfs_fs_time_sec (cfs_fs_time_t *);
62 * void cfs_fs_time_usec (cfs_fs_time_t *, struct timeval *);
63 * void cfs_fs_time_nsec (cfs_fs_time_t *, struct timespec *);
64 * int cfs_fs_time_before (cfs_fs_time_t *, cfs_fs_time_t *);
65 * int cfs_fs_time_beforeq(cfs_fs_time_t *, cfs_fs_time_t *);
74 #define ONE_BILLION ((u_int64_t)1000000000)
75 #define ONE_MILLION 1000000
78 * Liblustre. time(2) based implementation.
81 #include <sys/types.h>
85 typedef time_t cfs_fs_time_t;
86 typedef time_t cfs_time_t;
87 typedef long cfs_duration_t;
89 static inline cfs_time_t cfs_time_current(void)
94 static inline cfs_duration_t cfs_time_seconds(int seconds)
99 static inline time_t cfs_time_current_sec(void)
101 return cfs_time_seconds(cfs_time_current());
104 static inline int cfs_time_before(cfs_time_t t1, cfs_time_t t2)
109 static inline int cfs_time_beforeq(cfs_time_t t1, cfs_time_t t2)
114 static inline cfs_duration_t cfs_duration_build(int64_t nano)
116 return (cfs_duration_t) (nano / ONE_BILLION);
119 static inline time_t cfs_duration_sec(cfs_duration_t d)
124 static inline void cfs_duration_usec(cfs_duration_t d, struct timeval *s)
130 static inline void cfs_duration_nsec(cfs_duration_t d, struct timespec *s)
136 static inline void cfs_fs_time_current(cfs_fs_time_t *t)
141 static inline time_t cfs_fs_time_sec(cfs_fs_time_t *t)
146 static inline void cfs_fs_time_usec(cfs_fs_time_t *t, struct timeval *v)
152 static inline void cfs_fs_time_nsec(cfs_fs_time_t *t, struct timespec *s)
158 static inline int cfs_fs_time_before(cfs_fs_time_t *t1, cfs_fs_time_t *t2)
163 static inline int cfs_fs_time_beforeq(cfs_fs_time_t *t1, cfs_fs_time_t *t2)
170 static inline cfs_time_t cfs_time_add(cfs_time_t t, cfs_duration_t d)
175 static inline cfs_duration_t cfs_time_sub(cfs_time_t t1, cfs_time_t t2)
180 #define cfs_time_current_64 cfs_time_current
181 #define cfs_time_add_64 cfs_time_add
182 #define cfs_time_shift_64 cfs_time_shift
183 #define cfs_time_before_64 cfs_time_before
185 #define CFS_TIME_T "%lu"
186 #define CFS_DURATION_T "%ld"
191 /* __LIBCFS_USER_TIME_H__ */
195 * c-indentation-style: "K&R"