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1 | /* |
2 | * Copyright (c) 1980 Regents of the University of California. | |
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3 | * All rights reserved. |
4 | * | |
5 | * Redistribution and use in source and binary forms are permitted | |
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6 | * provided that the above copyright notice and this paragraph are |
7 | * duplicated in all such forms and that any documentation, | |
8 | * advertising materials, and other materials related to such | |
9 | * distribution and use acknowledge that the software was developed | |
10 | * by the University of California, Berkeley. The name of the | |
11 | * University may not be used to endorse or promote products derived | |
12 | * from this software without specific prior written permission. | |
13 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR | |
14 | * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED | |
15 | * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. | |
bb0cfa24 DF |
16 | */ |
17 | ||
b8401192 | 18 | #ifndef lint |
d99e6414 | 19 | static char sccsid[] = "@(#)schedule.c 5.3 (Berkeley) %G%"; |
e9fb6bea | 20 | #endif /* not lint */ |
b8401192 KM |
21 | |
22 | # include "trek.h" | |
23 | ||
24 | /* | |
25 | ** SCHEDULE AN EVENT | |
26 | ** | |
27 | ** An event of type 'type' is scheduled for time NOW + 'offset' | |
28 | ** into the first available slot. 'x', 'y', and 'z' are | |
29 | ** considered the attributes for this event. | |
30 | ** | |
31 | ** The address of the slot is returned. | |
32 | */ | |
33 | ||
34 | struct event *schedule(type, offset, x, y, z) | |
35 | int type; | |
06d69904 | 36 | double offset; |
b8401192 KM |
37 | char x, y; |
38 | char z; | |
39 | { | |
40 | register struct event *e; | |
41 | register int i; | |
06d69904 | 42 | double date; |
b8401192 KM |
43 | |
44 | date = Now.date + offset; | |
45 | for (i = 0; i < MAXEVENTS; i++) | |
46 | { | |
47 | e = &Event[i]; | |
48 | if (e->evcode) | |
49 | continue; | |
50 | /* got a slot */ | |
51 | # ifdef xTRACE | |
52 | if (Trace) | |
53 | printf("schedule: type %d @ %.2f slot %d parm %d %d %d\n", | |
54 | type, date, i, x, y, z); | |
55 | # endif | |
56 | e->evcode = type; | |
57 | e->date = date; | |
58 | e->x = x; | |
59 | e->y = y; | |
60 | e->systemname = z; | |
61 | Now.eventptr[type] = e; | |
62 | return (e); | |
63 | } | |
64 | syserr("Cannot schedule event %d parm %d %d %d", type, x, y, z); | |
65 | } | |
66 | ||
67 | ||
68 | /* | |
69 | ** RESCHEDULE AN EVENT | |
70 | ** | |
71 | ** The event pointed to by 'e' is rescheduled to the current | |
72 | ** time plus 'offset'. | |
73 | */ | |
74 | ||
75 | reschedule(e1, offset) | |
76 | struct event *e1; | |
06d69904 | 77 | double offset; |
b8401192 | 78 | { |
06d69904 | 79 | double date; |
b8401192 KM |
80 | register struct event *e; |
81 | ||
82 | e = e1; | |
83 | ||
84 | date = Now.date + offset; | |
85 | e->date = date; | |
86 | # ifdef xTRACE | |
87 | if (Trace) | |
88 | printf("reschedule: type %d parm %d %d %d @ %.2f\n", | |
89 | e->evcode, e->x, e->y, e->systemname, date); | |
90 | # endif | |
91 | return; | |
92 | } | |
93 | ||
94 | ||
95 | /* | |
96 | ** UNSCHEDULE AN EVENT | |
97 | ** | |
98 | ** The event at slot 'e' is deleted. | |
99 | */ | |
100 | ||
101 | unschedule(e1) | |
102 | struct event *e1; | |
103 | { | |
104 | register struct event *e; | |
105 | ||
106 | e = e1; | |
107 | ||
108 | # ifdef xTRACE | |
109 | if (Trace) | |
110 | printf("unschedule: type %d @ %.2f parm %d %d %d\n", | |
111 | e->evcode, e->date, e->x, e->y, e->systemname); | |
112 | # endif | |
113 | Now.eventptr[e->evcode & E_EVENT] = 0; | |
114 | e->date = 1e50; | |
115 | e->evcode = 0; | |
116 | return; | |
117 | } | |
118 | ||
119 | ||
120 | /* | |
121 | ** Abreviated schedule routine | |
122 | ** | |
123 | ** Parameters are the event index and a factor for the time | |
124 | ** figure. | |
125 | */ | |
126 | ||
127 | struct event *xsched(ev1, factor, x, y, z) | |
128 | int ev1; | |
129 | int factor; | |
130 | int x, y, z; | |
131 | { | |
132 | register int ev; | |
133 | ||
134 | ev = ev1; | |
135 | return (schedule(ev, -Param.eventdly[ev] * Param.time * log(franf()) / factor, x, y, z)); | |
136 | } | |
137 | ||
138 | ||
139 | /* | |
140 | ** Simplified reschedule routine | |
141 | ** | |
142 | ** Parameters are the event index, the initial date, and the | |
143 | ** division factor. Look at the code to see what really happens. | |
144 | */ | |
145 | ||
146 | xresched(e1, ev1, factor) | |
147 | struct event *e1; | |
148 | int ev1; | |
149 | int factor; | |
150 | { | |
151 | register int ev; | |
152 | register struct event *e; | |
153 | ||
154 | ev = ev1; | |
155 | e = e1; | |
156 | reschedule(e, -Param.eventdly[ev] * Param.time * log(franf()) / factor); | |
157 | } |