1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
2 * vim:expandtab:shiftwidth=8:tabstop=8:
6 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 only,
10 * as published by the Free Software Foundation.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * General Public License version 2 for more details (a copy is included
16 * in the LICENSE file that accompanied this code).
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19 * version 2 along with this program; If not, see
20 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
22 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
23 * CA 95054 USA or visit www.sun.com if you need additional information or
29 * Copyright 2008 Sun Microsystems, Inc. All rights reserved
30 * Use is subject to license terms.
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
36 * libcfs/include/libcfs/winnt/winnt-time.h
38 * Implementation of portable time API for Winnt (kernel and user-level).
41 #ifndef __LIBCFS_WINNT_LINUX_TIME_H__
42 #define __LIBCFS_WINNT_LINUX_TIME_H__
44 #ifndef __LIBCFS_LIBCFS_H__
45 #error Do not #include this file directly. #include <libcfs/libcfs.h> instead
48 /* Portable time API */
51 * Platform provides three opaque data-types:
53 * cfs_time_t represents point in time. This is internal kernel
54 * time rather than "wall clock". This time bears no
55 * relation to gettimeofday().
57 * cfs_duration_t represents time interval with resolution of internal
60 * cfs_fs_time_t represents instance in world-visible time. This is
61 * used in file-system time-stamps
63 * cfs_time_t cfs_time_current(void);
64 * cfs_time_t cfs_time_add (cfs_time_t, cfs_duration_t);
65 * cfs_duration_t cfs_time_sub (cfs_time_t, cfs_time_t);
66 * int cfs_time_before (cfs_time_t, cfs_time_t);
67 * int cfs_time_beforeq(cfs_time_t, cfs_time_t);
69 * cfs_duration_t cfs_duration_build(int64_t);
71 * time_t cfs_duration_sec (cfs_duration_t);
72 * void cfs_duration_usec(cfs_duration_t, struct timeval *);
73 * void cfs_duration_nsec(cfs_duration_t, struct timespec *);
75 * void cfs_fs_time_current(cfs_fs_time_t *);
76 * time_t cfs_fs_time_sec (cfs_fs_time_t *);
77 * void cfs_fs_time_usec (cfs_fs_time_t *, struct timeval *);
78 * void cfs_fs_time_nsec (cfs_fs_time_t *, struct timespec *);
79 * int cfs_fs_time_before (cfs_fs_time_t *, cfs_fs_time_t *);
80 * int cfs_fs_time_beforeq(cfs_fs_time_t *, cfs_fs_time_t *);
88 time_t tv_sec; /* seconds */
89 suseconds_t tv_usec; /* microseconds */
92 typedef time_t cfs_time_t;
93 typedef time_t cfs_duration_t;
97 #include <libcfs/winnt/portals_compat25.h>
105 typedef struct timeval cfs_fs_time_t;
108 #define ONE_BILLION ((u_int64_t)1000000000)
109 #define ONE_MILLION ((u_int64_t) 1000000)
112 * Generic kernel stuff
115 #define jiffies (ULONG_PTR)JIFFIES()
116 #define cfs_jiffies (ULONG_PTR)JIFFIES()
118 static inline void cfs_gettimeofday(struct timeval *tv)
122 KeQuerySystemTime(&Time);
124 tv->tv_sec = (time_t) (Time.QuadPart / 10000000);
125 tv->tv_usec = (suseconds_t) (Time.QuadPart % 10000000) / 10;
128 static inline LONGLONG JIFFIES()
131 LARGE_INTEGER Elapse;
133 KeQueryTickCount(&Tick);
135 Elapse.QuadPart = Tick.QuadPart * KeQueryTimeIncrement();
136 Elapse.QuadPart /= (10000000 / CFS_HZ);
138 return Elapse.QuadPart;
141 static inline cfs_time_t cfs_time_current(void)
143 return (cfs_time_t)JIFFIES();
146 static inline time_t cfs_time_current_sec(void)
148 return (time_t)(JIFFIES() / CFS_HZ);
151 #define cfs_time_before(t1, t2) (((signed)(t1) - (signed)(t2)) < 0)
152 #define cfs_time_beforeq(t1, t2) (((signed)(t1) - (signed)(t2)) <= 0)
154 static inline void cfs_fs_time_current(cfs_fs_time_t *t)
159 KeQuerySystemTime(&Sys);
161 RtlTimeToSecondsSince1970(&Sys, &Linux);
164 t->tv_usec = (Sys.LowPart % 10000000) / 10;
167 static inline unsigned long get_seconds(void)
170 cfs_fs_time_current(&t);
171 return (unsigned long) t.tv_sec;
174 static inline cfs_time_t cfs_fs_time_sec(cfs_fs_time_t *t)
176 return (cfs_time_t)t->tv_sec;
179 static inline unsigned long __cfs_fs_time_flat(cfs_fs_time_t *t)
181 return (unsigned long)(t->tv_sec) * ONE_MILLION + t->tv_usec;
184 static inline int cfs_fs_time_before(cfs_fs_time_t *t1, cfs_fs_time_t *t2)
186 return (__cfs_fs_time_flat(t1) < __cfs_fs_time_flat(t2));
189 static inline int cfs_fs_time_beforeq(cfs_fs_time_t *t1, cfs_fs_time_t *t2)
191 return (__cfs_fs_time_flat(t1) <= __cfs_fs_time_flat(t2));
194 static inline cfs_duration_t cfs_time_seconds(cfs_duration_t seconds)
196 return (cfs_duration_t)(seconds * CFS_HZ);
199 static inline time_t cfs_duration_sec(cfs_duration_t d)
201 return (time_t)(d / CFS_HZ);
204 static inline void cfs_duration_usec(cfs_duration_t d, struct timeval *s)
206 s->tv_sec = (__u32)(d / CFS_HZ);
207 s->tv_usec = (__u32)((d - (cfs_duration_t)s->tv_sec * CFS_HZ) *
208 ONE_MILLION / CFS_HZ);
211 static inline void cfs_duration_nsec(cfs_duration_t d, struct timespec *s)
213 s->tv_sec = (__u32) (d / CFS_HZ);
214 s->tv_nsec = (__u32)((d - (cfs_duration_t)s->tv_sec * CFS_HZ) *
215 ONE_BILLION / CFS_HZ);
218 static inline void cfs_fs_time_usec(cfs_fs_time_t *t, struct timeval *v)
223 static inline void cfs_fs_time_nsec(cfs_fs_time_t *t, struct timespec *s)
225 s->tv_sec = (__u32) t->tv_sec;
226 s->tv_nsec = (__u32) t->tv_usec * 1000;
230 #define cfs_time_current_64 JIFFIES
232 static inline __u64 cfs_time_add_64(__u64 t, __u64 d)
237 static inline __u64 cfs_time_shift_64(cfs_duration_t seconds)
239 return cfs_time_add_64(cfs_time_current_64(),
240 cfs_time_seconds(seconds));
243 static inline int cfs_time_before_64(__u64 t1, __u64 t2)
245 return (__s64)t2 - (__s64)t1 > 0;
248 static inline int cfs_time_beforeq_64(__u64 t1, __u64 t2)
250 return (__s64)t2 - (__s64)t1 >= 0;
257 #define LTIME_S(t) *((__u64 *)&(t))
259 #define CFS_TIME_T "%u"
260 #define CFS_DURATION_T "%d"
262 #else /* !__KERNEL__ */
265 #ifdef HAVE_LIBPTHREAD
269 unsigned long tv_sec;
270 unsigned long tv_nsec;
272 #endif /* HAVE_LIBPTHREAD */
274 #include "../user-time.h"
276 /* liblustre. time(2) based implementation. */
277 int nanosleep(const struct timespec *rqtp, struct timespec *rmtp);
278 void sleep(int time);
279 void cfs_gettimeofday(struct timeval *tv);
280 int gettimeofday(struct timeval *tv, void * tz);
282 #endif /* !__KERNEL__ */
284 /* __LIBCFS_LINUX_LINUX_TIME_H__ */
288 * c-indentation-style: "K&R"