NetBSD-5.0.2/sys/sys/timevar.h
/* $NetBSD: timevar.h,v 1.23 2008/07/15 16:18:09 christos Exp $ */
/*
* Copyright (c) 2005, 2008 The NetBSD Foundation.
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* 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.
* 3. 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
*/
#ifndef _SYS_TIMEVAR_H_
#define _SYS_TIMEVAR_H_
#include <sys/callout.h>
#include <sys/queue.h>
#include <sys/signal.h>
#include <sys/systm.h>
/*
* Structure used to manage timers in a process.
*/
struct ptimer {
union {
callout_t pt_ch;
struct {
LIST_ENTRY(ptimer) pt_list;
int pt_active;
} pt_nonreal;
} pt_data;
struct sigevent pt_ev;
struct itimerspec pt_time;
struct ksiginfo pt_info;
int pt_overruns; /* Overruns currently accumulating */
int pt_poverruns; /* Overruns associated w/ a delivery */
int pt_type;
int pt_entry;
int pt_queued;
struct proc *pt_proc;
TAILQ_ENTRY(ptimer) pt_chain;
};
#define pt_ch pt_data.pt_ch
#define pt_list pt_data.pt_nonreal.pt_list
#define pt_active pt_data.pt_nonreal.pt_active
#define TIMER_MAX 32 /* See ptimers->pts_fired if you enlarge this */
#define TIMERS_ALL 0
#define TIMERS_POSIX 1
LIST_HEAD(ptlist, ptimer);
struct ptimers {
struct ptlist pts_virtual;
struct ptlist pts_prof;
struct ptimer *pts_timers[TIMER_MAX];
int pts_fired;
};
/*
* Functions for looking at our clock: [get]{bin,nano,micro}[up]time()
*
* Functions without the "get" prefix returns the best timestamp
* we can produce in the given format.
*
* "bin" == struct bintime == seconds + 64 bit fraction of seconds.
* "nano" == struct timespec == seconds + nanoseconds.
* "micro" == struct timeval == seconds + microseconds.
*
* Functions containing "up" returns time relative to boot and
* should be used for calculating time intervals.
*
* Functions without "up" returns GMT time.
*
* Functions with the "get" prefix returns a less precise result
* much faster than the functions without "get" prefix and should
* be used where a precision of 1/HZ (eg 10 msec on a 100HZ machine)
* is acceptable or where performance is priority.
* (NB: "precision", _not_ "resolution" !)
*
*/
void binuptime(struct bintime *);
void nanouptime(struct timespec *);
void microuptime(struct timeval *);
void bintime(struct bintime *);
void nanotime(struct timespec *);
void microtime(struct timeval *);
void getbinuptime(struct bintime *);
void getnanouptime(struct timespec *);
void getmicrouptime(struct timeval *);
void getbintime(struct bintime *);
void getnanotime(struct timespec *);
void getmicrotime(struct timeval *);
/* Other functions */
int adjtime1(const struct timeval *, struct timeval *, struct proc *);
int clock_settime1(struct proc *, clockid_t, const struct timespec *, bool);
int dogetitimer(struct proc *, int, struct itimerval *);
int dosetitimer(struct proc *, int, struct itimerval *);
int dotimer_gettime(int, struct proc *, struct itimerspec *);
int dotimer_settime(int, struct itimerspec *, struct itimerspec *, int,
struct proc *);
int tshzto(const struct timespec *);
int tvhzto(const struct timeval *);
void inittimecounter(void);
int itimerfix(struct timeval *);
int itimespecfix(struct timespec *);
int ppsratecheck(struct timeval *, int *, int);
int ratecheck(struct timeval *, const struct timeval *);
void realtimerexpire(void *);
int settime(struct proc *p, struct timespec *);
int nanosleep1(struct lwp *l, struct timespec *, struct timespec *);
int settimeofday1(const struct timeval *, bool,
const void *, struct lwp *, bool);
int timer_create1(timer_t *, clockid_t, struct sigevent *, copyin_t,
struct lwp *);
void timer_gettime(struct ptimer *, struct itimerspec *);
void timer_settime(struct ptimer *);
struct ptimers *timers_alloc(struct proc *);
void timers_free(struct proc *, int);
void timer_tick(struct lwp *, bool);
int tstohz(const struct timespec *);
int tvtohz(const struct timeval *);
int inittimeleft(struct timeval *, struct timeval *);
int gettimeleft(struct timeval *, struct timeval *);
void timerupcall(struct lwp *);
void time_init(void);
void time_init2(void);
extern time_t time_second; /* current second in the epoch */
extern time_t time_uptime; /* system uptime in seconds */
#endif /* !_SYS_TIMEVAR_H_ */