183 lines
4.2 KiB
C
183 lines
4.2 KiB
C
/* $NetBSD: schedule.c,v 1.6 2006/03/19 00:56:12 christos Exp $ */
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/*
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* Copyright (c) 1980, 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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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)schedule.c 8.1 (Berkeley) 5/31/93";
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#else
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__RCSID("$NetBSD: schedule.c,v 1.6 2006/03/19 00:56:12 christos Exp $");
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#endif
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#endif /* not lint */
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#include <stdio.h>
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#include <math.h>
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#include <err.h>
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#include "trek.h"
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/*
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** SCHEDULE AN EVENT
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**
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** An event of type 'type' is scheduled for time NOW + 'offset'
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** into the first available slot. 'x', 'y', and 'z' are
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** considered the attributes for this event.
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**
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** The address of the slot is returned.
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*/
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struct event *schedule(type, offset, x, y, z)
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int type;
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double offset;
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char x, y;
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char z;
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{
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struct event *e;
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int i;
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double date;
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date = Now.date + offset;
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for (i = 0; i < MAXEVENTS; i++)
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{
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e = &Event[i];
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if (e->evcode)
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continue;
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/* got a slot */
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# ifdef xTRACE
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if (Trace)
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printf("schedule: type %d @ %.2f slot %d parm %d %d %d\n",
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type, date, i, x, y, z);
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# endif
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e->evcode = type;
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e->date = date;
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e->x = x;
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e->y = y;
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e->systemname = z;
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Now.eventptr[type & ~E_GHOST] = e;
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return (e);
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}
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errx(1, "Cannot schedule event %d parm %d %d %d", type, x, y, z);
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}
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/*
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** RESCHEDULE AN EVENT
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**
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** The event pointed to by 'e' is rescheduled to the current
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** time plus 'offset'.
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*/
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void
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reschedule(e1, offset)
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struct event *e1;
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double offset;
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{
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double date;
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struct event *e;
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e = e1;
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date = Now.date + offset;
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e->date = date;
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# ifdef xTRACE
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if (Trace)
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printf("reschedule: type %d parm %d %d %d @ %.2f\n",
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e->evcode, e->x, e->y, e->systemname, date);
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# endif
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return;
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}
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/*
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** UNSCHEDULE AN EVENT
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**
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** The event at slot 'e' is deleted.
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*/
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void
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unschedule(e1)
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struct event *e1;
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{
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struct event *e;
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e = e1;
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# ifdef xTRACE
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if (Trace)
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printf("unschedule: type %d @ %.2f parm %d %d %d\n",
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e->evcode, e->date, e->x, e->y, e->systemname);
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# endif
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Now.eventptr[e->evcode & E_EVENT] = 0;
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e->date = 1e50;
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e->evcode = 0;
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return;
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}
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/*
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** Abreviated schedule routine
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**
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** Parameters are the event index and a factor for the time
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** figure.
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*/
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struct event *xsched(ev1, factor, x, y, z)
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int ev1;
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int factor;
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int x, y, z;
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{
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int ev;
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ev = ev1;
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return (schedule(ev, -Param.eventdly[ev] * Param.time * log(franf()) / factor, x, y, z));
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}
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/*
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** Simplified reschedule routine
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**
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** Parameters are the event index, the initial date, and the
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** division factor. Look at the code to see what really happens.
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*/
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void
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xresched(e1, ev1, factor)
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struct event *e1;
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int ev1;
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int factor;
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{
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int ev;
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struct event *e;
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ev = ev1;
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e = e1;
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reschedule(e, -Param.eventdly[ev] * Param.time * log(franf()) / factor);
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}
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