209 lines
7.8 KiB
C
209 lines
7.8 KiB
C
/* $NetBSD: timevar.h,v 1.6 2006/07/23 22:06:14 ad Exp $ */
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/*
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* Copyright (c) 2005 The NetBSD Foundation.
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* All rights reserved.
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*
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* This code is derived from software contributed to the NetBSD Foundation
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* by Quentin Garnier.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the NetBSD
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* Foundation, Inc. and its contributors.
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* 4. Neither the name of The NetBSD Foundation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982, 1986, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)time.h 8.5 (Berkeley) 5/4/95
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*/
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#ifndef _SYS_TIMEVAR_H_
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#define _SYS_TIMEVAR_H_
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#include <sys/callout.h>
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#include <sys/queue.h>
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#include <sys/signal.h>
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#include <sys/systm.h>
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/*
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* Structure used to manage timers in a process.
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*/
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struct ptimer {
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union {
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struct callout pt_ch;
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struct {
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LIST_ENTRY(ptimer) pt_list;
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int pt_active;
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} pt_nonreal;
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} pt_data;
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struct sigevent pt_ev;
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struct itimerval pt_time;
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struct ksiginfo pt_info;
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int pt_overruns; /* Overruns currently accumulating */
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int pt_poverruns; /* Overruns associated w/ a delivery */
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int pt_type;
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int pt_entry;
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struct proc *pt_proc;
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};
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#define pt_ch pt_data.pt_ch
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#define pt_list pt_data.pt_nonreal.pt_list
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#define pt_active pt_data.pt_nonreal.pt_active
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#define TIMER_MAX 32 /* See ptimers->pts_fired if you enlarge this */
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#define TIMERS_ALL 0
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#define TIMERS_POSIX 1
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LIST_HEAD(ptlist, ptimer);
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struct ptimers {
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struct ptlist pts_virtual;
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struct ptlist pts_prof;
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struct ptimer *pts_timers[TIMER_MAX];
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int pts_fired;
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};
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/*
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* Functions for looking at our clock: [get]{bin,nano,micro}[up]time()
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*
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* Functions without the "get" prefix returns the best timestamp
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* we can produce in the given format.
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*
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* "bin" == struct bintime == seconds + 64 bit fraction of seconds.
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* "nano" == struct timespec == seconds + nanoseconds.
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* "micro" == struct timeval == seconds + microseconds.
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*
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* Functions containing "up" returns time relative to boot and
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* should be used for calculating time intervals.
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*
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* Functions without "up" returns GMT time.
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*
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* Functions with the "get" prefix returns a less precise result
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* much faster than the functions without "get" prefix and should
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* be used where a precision of 10 msec is acceptable or where
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* performance is priority. (NB: "precision", _not_ "resolution" !)
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*
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*/
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#ifdef __HAVE_TIMECOUNTER
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void binuptime(struct bintime *);
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void nanouptime(struct timespec *);
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void microuptime(struct timeval *);
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void bintime(struct bintime *);
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void nanotime(struct timespec *);
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void microtime(struct timeval *);
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void getbinuptime(struct bintime *);
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void getnanouptime(struct timespec *);
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void getmicrouptime(struct timeval *);
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void getbintime(struct bintime *);
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void getnanotime(struct timespec *);
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void getmicrotime(struct timeval *);
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#else /* !__HAVE_TIMECOUNTER */
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/* timecounter compat functions */
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void microtime(struct timeval *);
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void nanotime(struct timespec *);
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void nanouptime(struct timespec *);
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void getbinuptime(struct bintime *);
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void getnanouptime(struct timespec *);
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void getmicrouptime(struct timeval *);
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void getnanotime(struct timespec *);
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void getmicrotime(struct timeval *);
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#endif /* !__HAVE_TIMECOUNTER */
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/* Other functions */
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int adjtime1(const struct timeval *, struct timeval *, struct proc *);
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int clock_settime1(struct proc *, clockid_t, const struct timespec *);
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int dogetitimer(struct proc *, int, struct itimerval *);
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int dosetitimer(struct proc *, int, struct itimerval *);
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int dotimer_gettime(int, struct proc *, struct itimerspec *);
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int dotimer_settime(int, struct itimerspec *, struct itimerspec *, int,
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struct proc *);
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int hzto(struct timeval *);
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void inittimecounter(void);
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int itimerdecr(struct ptimer *, int);
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void itimerfire(struct ptimer *);
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int itimerfix(struct timeval *tv);
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int ppsratecheck(struct timeval *, int *, int);
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int ratecheck(struct timeval *, const struct timeval *);
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void realtimerexpire(void *);
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int settime(struct proc *p, struct timespec *);
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int settimeofday1(const struct timeval *, const struct timezone *,
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struct proc *);
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int timer_create1(timer_t *, clockid_t, struct sigevent *, copyin_t,
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struct lwp *);
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void timer_gettime(struct ptimer *, struct itimerval *);
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void timer_settime(struct ptimer *);
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void timers_alloc(struct proc *);
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void timers_free(struct proc *, int);
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int tstohz(struct timespec *);
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int tvtohz(struct timeval *);
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int inittimeleft(struct timeval *, struct timeval *);
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int gettimeleft(struct timeval *, struct timeval *);
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#ifdef __HAVE_TIMECOUNTER
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extern time_t time_second; /* current second in the epoch */
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extern time_t time_uptime; /* system uptime in seconds */
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#else /* !__HAVE_TIMECOUNTER */
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extern volatile struct timeval mono_time;
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extern volatile struct timeval time;
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#define time_second time.tv_sec
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#define time_uptime mono_time.tv_sec
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#endif /* !__HAVE_TIMECOUNTER */
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#endif /* !_SYS_TIMEVAR_H_ */
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