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- /*
- * Copyright (c) 1980 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. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 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.
- */
-
- #ifndef lint
- static char sccsid[] = "@(#)schedule.c 5.4 (Berkeley) 6/1/90";
- #endif /* not lint */
-
- # include "trek.h"
-
- /*
- ** SCHEDULE AN EVENT
- **
- ** An event of type 'type' is scheduled for time NOW + 'offset'
- ** into the first available slot. 'x', 'y', and 'z' are
- ** considered the attributes for this event.
- **
- ** The address of the slot is returned.
- */
-
- struct event *schedule(type, offset, x, y, z)
- int type;
- double offset;
- char x, y;
- char z;
- {
- register struct event *e;
- register int i;
- double date;
-
- date = Now.date + offset;
- for (i = 0; i < MAXEVENTS; i++)
- {
- e = &Event[i];
- if (e->evcode)
- continue;
- /* got a slot */
- # ifdef xTRACE
- if (Trace)
- printf("schedule: type %d @ %.2f slot %d parm %d %d %d\n",
- type, date, i, x, y, z);
- # endif
- e->evcode = type;
- e->date = date;
- e->x = x;
- e->y = y;
- e->systemname = z;
- Now.eventptr[type] = e;
- return (e);
- }
- syserr("Cannot schedule event %d parm %d %d %d", type, x, y, z);
- }
-
-
- /*
- ** RESCHEDULE AN EVENT
- **
- ** The event pointed to by 'e' is rescheduled to the current
- ** time plus 'offset'.
- */
-
- reschedule(e1, offset)
- struct event *e1;
- double offset;
- {
- double date;
- register struct event *e;
-
- e = e1;
-
- date = Now.date + offset;
- e->date = date;
- # ifdef xTRACE
- if (Trace)
- printf("reschedule: type %d parm %d %d %d @ %.2f\n",
- e->evcode, e->x, e->y, e->systemname, date);
- # endif
- return;
- }
-
-
- /*
- ** UNSCHEDULE AN EVENT
- **
- ** The event at slot 'e' is deleted.
- */
-
- unschedule(e1)
- struct event *e1;
- {
- register struct event *e;
-
- e = e1;
-
- # ifdef xTRACE
- if (Trace)
- printf("unschedule: type %d @ %.2f parm %d %d %d\n",
- e->evcode, e->date, e->x, e->y, e->systemname);
- # endif
- Now.eventptr[e->evcode & E_EVENT] = 0;
- e->date = 1e50;
- e->evcode = 0;
- return;
- }
-
-
- /*
- ** Abreviated schedule routine
- **
- ** Parameters are the event index and a factor for the time
- ** figure.
- */
-
- struct event *xsched(ev1, factor, x, y, z)
- int ev1;
- int factor;
- int x, y, z;
- {
- register int ev;
-
- ev = ev1;
- return (schedule(ev, -Param.eventdly[ev] * Param.time * log(franf()) / factor, x, y, z));
- }
-
-
- /*
- ** Simplified reschedule routine
- **
- ** Parameters are the event index, the initial date, and the
- ** division factor. Look at the code to see what really happens.
- */
-
- xresched(e1, ev1, factor)
- struct event *e1;
- int ev1;
- int factor;
- {
- register int ev;
- register struct event *e;
-
- ev = ev1;
- e = e1;
- reschedule(e, -Param.eventdly[ev] * Param.time * log(franf()) / factor);
- }
-