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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2005-2009 Oracle. All rights reserved.
*
* $Id$
*/
/*
* Copyright (c) 1982, 1986, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)time.h 8.5 (Berkeley) 5/4/95
* FreeBSD: src/sys/sys/time.h,v 1.65 2004/04/07 04:19:49 imp Exp
*/
#ifndef _DB_CLOCK_H_
#define _DB_CLOCK_H_
#if defined(__cplusplus)
extern "C" {
#endif
/*
* This declaration is POSIX-compatible. Because there are lots of different
* time.h include file patterns out there, it's easier to declare our own name
* in all cases than to try and discover if a system has a struct timespec.
* For the same reason, and because we'd have to #include <sys/time.h> in db.h,
* we don't export any timespec structures in the DB API, even in places where
* it would make sense, like the replication statistics information.
*/
typedef struct {
time_t tv_sec; /* seconds */
long tv_nsec; /* nanoseconds */
} db_timespec;
/* Operations on timespecs */
#undef timespecclear
#define timespecclear(tvp) ((tvp)->tv_sec = (tvp)->tv_nsec = 0)
#undef timespecisset
#define timespecisset(tvp) ((tvp)->tv_sec || (tvp)->tv_nsec)
#undef timespeccmp
#define timespeccmp(tvp, uvp, cmp) \
(((tvp)->tv_sec == (uvp)->tv_sec) ? \
((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \
((tvp)->tv_sec cmp (uvp)->tv_sec))
#undef timespecadd
/*
* Note that using timespecadd to add to yourself (i.e. doubling)
* must be supported.
*/
#define timespecadd(vvp, uvp) \
do { \
(vvp)->tv_sec += (uvp)->tv_sec; \
(vvp)->tv_nsec += (uvp)->tv_nsec; \
if ((vvp)->tv_nsec >= 1000000000) { \
(vvp)->tv_sec++; \
(vvp)->tv_nsec -= 1000000000; \
} \
} while (0)
#undef timespecsub
#define timespecsub(vvp, uvp) \
do { \
(vvp)->tv_sec -= (uvp)->tv_sec; \
(vvp)->tv_nsec -= (uvp)->tv_nsec; \
if ((vvp)->tv_nsec < 0) { \
(vvp)->tv_sec--; \
(vvp)->tv_nsec += 1000000000; \
} \
} while (0)
#undef timespecset
#define timespecset(vvp, sec, nsec) \
do { \
(vvp)->tv_sec = (time_t)(sec); \
(vvp)->tv_nsec = (long)(nsec); \
} while (0)
#define DB_TIMEOUT_TO_TIMESPEC(t, vvp) \
do { \
(vvp)->tv_sec = (time_t)((t) / 1000000); \
(vvp)->tv_nsec = (long)(((t) % 1000000) * 1000); \
} while (0)
#define DB_TIMESPEC_TO_TIMEOUT(t, vvp, prec) \
do { \
t = (u_long)((vvp)->tv_sec * 1000000); \
t += (u_long)((vvp)->tv_nsec / 1000); \
/* Add in 1 usec for lost nsec precision if wanted. */ \
if (prec) \
t++; \
} while (0)
#define TIMESPEC_ADD_DB_TIMEOUT(vvp, t) \
do { \
db_timespec __tmp; \
DB_TIMEOUT_TO_TIMESPEC(t, &__tmp); \
timespecadd((vvp), &__tmp); \
} while (0)
#if defined(__cplusplus)
}
#endif
#endif /* !_DB_CLOCK_H_ */
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