1 |
gregl |
3.1 |
#ifndef lint |
2 |
greg |
3.28 |
static const char RCSid[] = "$Id$"; |
3 |
gregl |
3.1 |
#endif |
4 |
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/* |
5 |
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* Holodeck display process communication |
6 |
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*/ |
7 |
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8 |
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#include "rholo.h" |
9 |
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#include "rhdisp.h" |
10 |
gregl |
3.2 |
#include <sys/uio.h> |
11 |
gregl |
3.1 |
|
12 |
gregl |
3.2 |
#ifndef HDSUF |
13 |
gwlarson |
3.26 |
#define HDSUF ".hdi" |
14 |
gregl |
3.2 |
#endif |
15 |
gwlarson |
3.26 |
#ifndef SLAVENAME |
16 |
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#define SLAVENAME "slave" |
17 |
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#endif |
18 |
gregl |
3.1 |
|
19 |
gwlarson |
3.21 |
#ifndef FNONBLK |
20 |
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#define FNONBLK O_NONBLOCK |
21 |
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#endif |
22 |
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23 |
gregl |
3.2 |
static int inp_flags; |
24 |
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static int dpd[3]; |
25 |
gregl |
3.5 |
static FILE *dpout; |
26 |
gregl |
3.2 |
|
27 |
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28 |
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disp_open(dname) /* open the named display driver */ |
29 |
gregl |
3.1 |
char *dname; |
30 |
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{ |
31 |
gwlarson |
3.25 |
char buf[sizeof(HDGRID)+512], fd0[8], fd1[8], *cmd[5], *sfn; |
32 |
gwlarson |
3.24 |
int i, n, len; |
33 |
gwlarson |
3.26 |
|
34 |
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if (!strcmp(dname, SLAVENAME)) { |
35 |
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dpd[0] = 0; /* read from stdin */ |
36 |
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dpout = stdout; /* write to stdout */ |
37 |
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dpd[2] = -1; /* we're the slave process */ |
38 |
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} else { |
39 |
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/* get full display program name */ |
40 |
gregl |
3.2 |
#ifdef DEVPATH |
41 |
gwlarson |
3.26 |
sprintf(buf, "%s/%s%s", DEVPATH, dname, HDSUF); |
42 |
gregl |
3.2 |
#else |
43 |
gwlarson |
3.26 |
sprintf(buf, "dev/%s%s", dname, HDSUF); |
44 |
gregl |
3.2 |
#endif |
45 |
gwlarson |
3.26 |
/* dup stdin and stdout */ |
46 |
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if (readinp) |
47 |
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sprintf(fd0, "%d", dup(0)); |
48 |
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else |
49 |
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strcpy(fd0, "-1"); |
50 |
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sprintf(fd1, "%d", dup(1)); |
51 |
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/* start the display process */ |
52 |
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cmd[0] = buf; |
53 |
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cmd[1] = froot; cmd[2] = fd1; cmd[3] = fd0; |
54 |
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cmd[4] = NULL; |
55 |
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i = open_process(dpd, cmd); |
56 |
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if (i <= 0) |
57 |
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error(USER, "cannot start display process"); |
58 |
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if ((dpout = fdopen(dpd[1], "w")) == NULL) |
59 |
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error(SYSTEM, "problem opening display pipe"); |
60 |
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/* close dup'ed stdin and stdout */ |
61 |
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if (readinp) |
62 |
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close(atoi(fd0)); |
63 |
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close(atoi(fd1)); |
64 |
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} |
65 |
gregl |
3.11 |
dpd[1] = -1; /* causes ignored error in close_process() */ |
66 |
gregl |
3.2 |
inp_flags = 0; |
67 |
gregl |
3.17 |
/* check if outside */ |
68 |
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if (vdef(OBSTRUCTIONS) && vbool(OBSTRUCTIONS)) |
69 |
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disp_result(DS_OUTSECT, 0, NULL); |
70 |
gwlarson |
3.18 |
/* send eye separation if specified */ |
71 |
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if (vdef(EYESEP)) { |
72 |
gwlarson |
3.23 |
sprintf(buf, "%.9e", vflt(EYESEP)); |
73 |
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disp_result(DS_EYESEP, strlen(buf)+1, buf); |
74 |
gwlarson |
3.18 |
} |
75 |
gwlarson |
3.23 |
/* write out hologram grids & octrees */ |
76 |
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for (i = 0; hdlist[i] != NULL; i++) { |
77 |
greg |
3.29 |
bcopy((void *)hdlist[i], buf, sizeof(HDGRID)); |
78 |
gwlarson |
3.24 |
len = sizeof(HDGRID); |
79 |
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n = vdef(GEOMETRY); |
80 |
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sfn = i<n ? nvalue(GEOMETRY,i) : |
81 |
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n ? nvalue(GEOMETRY,n-1) : vval(OCTREE); |
82 |
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strcpy(buf+len, sfn); |
83 |
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len += strlen(sfn) + 1; |
84 |
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n = vdef(PORTS); |
85 |
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sfn = i<n ? nvalue(PORTS,i) : n ? nvalue(PORTS,n-1) : ""; |
86 |
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strcpy(buf+len, sfn); |
87 |
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len += strlen(sfn) + 1; |
88 |
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disp_result(DS_ADDHOLO, len, buf); |
89 |
gwlarson |
3.23 |
} |
90 |
gregl |
3.5 |
disp_flush(); |
91 |
gregl |
3.1 |
} |
92 |
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93 |
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94 |
gregl |
3.2 |
disp_packet(p) /* display a packet */ |
95 |
gregl |
3.4 |
register PACKHEAD *p; |
96 |
gregl |
3.2 |
{ |
97 |
gregl |
3.4 |
disp_result(DS_BUNDLE, packsiz(p->nr), (char *)p); |
98 |
gregl |
3.2 |
} |
99 |
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100 |
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101 |
gregl |
3.1 |
disp_check(block) /* check display process */ |
102 |
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int block; |
103 |
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{ |
104 |
gregl |
3.2 |
MSGHEAD msg; |
105 |
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int n; |
106 |
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char *buf = NULL; |
107 |
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108 |
gregl |
3.6 |
if (dpout == NULL) |
109 |
gregl |
3.2 |
return(-1); |
110 |
gregl |
3.5 |
/* flush display output */ |
111 |
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disp_flush(); |
112 |
gregl |
3.3 |
/* check read blocking */ |
113 |
gregl |
3.2 |
if (block != (inp_flags == 0)) { |
114 |
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inp_flags = block ? 0 : FNONBLK; |
115 |
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if (fcntl(dpd[0], F_SETFL, inp_flags) < 0) |
116 |
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goto fcntlerr; |
117 |
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} |
118 |
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/* read message header */ |
119 |
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n = read(dpd[0], (char *)&msg, sizeof(MSGHEAD)); |
120 |
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if (n != sizeof(MSGHEAD)) { |
121 |
gregl |
3.10 |
if (n >= 0) { |
122 |
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dpout = NULL; |
123 |
gregl |
3.2 |
error(USER, "display process died"); |
124 |
gregl |
3.10 |
} |
125 |
gregl |
3.2 |
if (errno != EAGAIN & errno != EINTR) |
126 |
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goto readerr; |
127 |
gregl |
3.3 |
return(2); /* acceptable failure */ |
128 |
gregl |
3.2 |
} |
129 |
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if (msg.nbytes) { /* get the message body */ |
130 |
gwlarson |
3.20 |
if (msg.nbytes < 0) |
131 |
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error(INTERNAL, "anti-message from display process"); |
132 |
gregl |
3.2 |
buf = (char *)malloc(msg.nbytes); |
133 |
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if (buf == NULL) |
134 |
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error(SYSTEM, "out of memory in disp_check"); |
135 |
gwlarson |
3.19 |
if (inp_flags != 0 && fcntl(dpd[0], F_SETFL, inp_flags=0) < 0) |
136 |
gregl |
3.2 |
goto fcntlerr; |
137 |
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if (readbuf(dpd[0], buf, msg.nbytes) != msg.nbytes) |
138 |
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goto readerr; |
139 |
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} |
140 |
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switch (msg.type) { /* take appropriate action */ |
141 |
gregl |
3.12 |
case DR_BUNDLE: /* new bundle to calculate */ |
142 |
gregl |
3.2 |
if (msg.nbytes != sizeof(PACKHEAD)) |
143 |
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error(INTERNAL, "bad DR_BUNDLE from display process"); |
144 |
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bundle_set(BS_ADD, (PACKHEAD *)buf, 1); |
145 |
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break; |
146 |
gregl |
3.12 |
case DR_NEWSET: /* new calculation set */ |
147 |
gregl |
3.2 |
if (msg.nbytes % sizeof(PACKHEAD)) |
148 |
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error(INTERNAL, "bad DR_NEWSET from display process"); |
149 |
gwlarson |
3.19 |
if (msg.nbytes) |
150 |
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disp_result(DS_STARTIMM, 0, NULL); |
151 |
gregl |
3.2 |
bundle_set(BS_NEW, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); |
152 |
gwlarson |
3.19 |
if (msg.nbytes) { |
153 |
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disp_result(DS_ENDIMM, 0, NULL); |
154 |
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disp_flush(); |
155 |
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} |
156 |
gregl |
3.2 |
break; |
157 |
gregl |
3.12 |
case DR_ADDSET: /* add to calculation set */ |
158 |
gwlarson |
3.19 |
if (!msg.nbytes) |
159 |
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break; |
160 |
gregl |
3.2 |
if (msg.nbytes % sizeof(PACKHEAD)) |
161 |
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error(INTERNAL, "bad DR_ADDSET from display process"); |
162 |
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disp_result(DS_STARTIMM, 0, NULL); |
163 |
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bundle_set(BS_ADD, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); |
164 |
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disp_result(DS_ENDIMM, 0, NULL); |
165 |
gregl |
3.15 |
disp_flush(); |
166 |
gregl |
3.2 |
break; |
167 |
gregl |
3.12 |
case DR_ADJSET: /* adjust calculation set members */ |
168 |
gwlarson |
3.19 |
if (!msg.nbytes) |
169 |
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break; |
170 |
gregl |
3.9 |
if (msg.nbytes % sizeof(PACKHEAD)) |
171 |
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error(INTERNAL, "bad DR_ADJSET from display process"); |
172 |
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disp_result(DS_STARTIMM, 0, NULL); |
173 |
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bundle_set(BS_ADJ, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); |
174 |
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disp_result(DS_ENDIMM, 0, NULL); |
175 |
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disp_flush(); |
176 |
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break; |
177 |
gregl |
3.12 |
case DR_DELSET: /* delete from calculation set */ |
178 |
gwlarson |
3.19 |
if (!msg.nbytes) |
179 |
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break; |
180 |
gregl |
3.2 |
if (msg.nbytes % sizeof(PACKHEAD)) |
181 |
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error(INTERNAL, "bad DR_DELSET from display process"); |
182 |
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bundle_set(BS_DEL, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); |
183 |
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break; |
184 |
gwlarson |
3.22 |
case DR_VIEWPOINT: /* set target eye position */ |
185 |
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if (msg.nbytes != sizeof(VIEWPOINT)) |
186 |
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error(INTERNAL, "bad DR_VIEWPOINT from display process"); |
187 |
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copystruct(&myeye, (VIEWPOINT *)buf); |
188 |
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break; |
189 |
gregl |
3.12 |
case DR_ATTEN: /* block for priority request */ |
190 |
gregl |
3.2 |
if (msg.nbytes) |
191 |
|
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error(INTERNAL, "bad DR_ATTEN from display process"); |
192 |
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/* send acknowledgement */ |
193 |
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disp_result(DS_ACKNOW, 0, NULL); |
194 |
gregl |
3.3 |
return(disp_check(1)); /* block on following request */ |
195 |
gregl |
3.13 |
case DR_KILL: /* kill computation process(es) */ |
196 |
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if (msg.nbytes) |
197 |
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error(INTERNAL, "bad DR_KILL from display process"); |
198 |
gregl |
3.14 |
if (nprocs > 0) |
199 |
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done_rtrace(); |
200 |
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else |
201 |
gregl |
3.13 |
error(WARNING, "no rtrace process to kill"); |
202 |
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break; |
203 |
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case DR_RESTART: /* restart computation process(es) */ |
204 |
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if (msg.nbytes) |
205 |
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error(INTERNAL, "bad DR_RESTART from display process"); |
206 |
gregl |
3.14 |
if (ncprocs > nprocs) |
207 |
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new_rtrace(); |
208 |
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else if (nprocs > 0) |
209 |
gregl |
3.13 |
error(WARNING, "rtrace already runnning"); |
210 |
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else |
211 |
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error(WARNING, "holodeck not open for writing"); |
212 |
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break; |
213 |
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case DR_CLOBBER: /* clobber holodeck */ |
214 |
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if (msg.nbytes) |
215 |
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error(INTERNAL, "bad DR_CLOBBER from display process"); |
216 |
gwlarson |
3.27 |
if (force <= 0 | ncprocs <= 0) |
217 |
gregl |
3.13 |
error(WARNING, "request to clobber holodeck denied"); |
218 |
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else { |
219 |
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error(WARNING, "clobbering holodeck contents"); |
220 |
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hdclobber(NULL); |
221 |
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} |
222 |
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break; |
223 |
gregl |
3.12 |
case DR_SHUTDOWN: /* shut down program */ |
224 |
gregl |
3.2 |
if (msg.nbytes) |
225 |
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error(INTERNAL, "bad DR_SHUTDOWN from display process"); |
226 |
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return(0); /* zero return signals shutdown */ |
227 |
gregl |
3.12 |
case DR_NOOP: /* do nothing */ |
228 |
gregl |
3.7 |
break; |
229 |
gregl |
3.2 |
default: |
230 |
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error(INTERNAL, "unrecognized request from display process"); |
231 |
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} |
232 |
gregl |
3.3 |
if (msg.nbytes) /* clean up */ |
233 |
gregl |
3.2 |
free(buf); |
234 |
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return(1); /* normal return value */ |
235 |
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fcntlerr: |
236 |
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error(SYSTEM, "cannot change display blocking mode"); |
237 |
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readerr: |
238 |
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error(SYSTEM, "error reading from display process"); |
239 |
gregl |
3.1 |
} |
240 |
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241 |
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|
242 |
gregl |
3.2 |
int |
243 |
|
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disp_close() /* close our display process */ |
244 |
gregl |
3.1 |
{ |
245 |
gregl |
3.2 |
int rval; |
246 |
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|
247 |
gregl |
3.6 |
if (dpout == NULL) |
248 |
gregl |
3.2 |
return(-1); |
249 |
gwlarson |
3.23 |
myeye.rng = 0; |
250 |
gregl |
3.2 |
disp_result(DS_SHUTDOWN, 0, NULL); |
251 |
gregl |
3.5 |
fclose(dpout); |
252 |
|
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dpout = NULL; |
253 |
gwlarson |
3.26 |
return(dpd[2]<0 ? 0 : close_process(dpd)); |
254 |
gregl |
3.2 |
} |
255 |
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256 |
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|
257 |
gregl |
3.5 |
disp_result(type, nbytes, p) /* queue result message to display process */ |
258 |
gregl |
3.2 |
int type, nbytes; |
259 |
|
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char *p; |
260 |
|
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{ |
261 |
|
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MSGHEAD msg; |
262 |
gwlarson |
3.20 |
/* consistency checks */ |
263 |
|
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#ifdef DEBUG |
264 |
|
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if (nbytes < 0 || nbytes > 0 & p == NULL) |
265 |
|
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error(CONSISTENCY, "bad buffer handed to disp_result"); |
266 |
|
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#endif |
267 |
gregl |
3.6 |
if (dpout == NULL) |
268 |
|
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return; |
269 |
gregl |
3.2 |
msg.type = type; |
270 |
|
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msg.nbytes = nbytes; |
271 |
gregl |
3.5 |
fwrite((char *)&msg, sizeof(MSGHEAD), 1, dpout); |
272 |
|
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if (nbytes > 0) |
273 |
|
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fwrite(p, 1, nbytes, dpout); |
274 |
|
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} |
275 |
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276 |
|
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|
277 |
|
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disp_flush() /* flush output to display */ |
278 |
|
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{ |
279 |
|
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if (fflush(dpout) < 0) |
280 |
|
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error(SYSTEM, "error writing to the display process"); |
281 |
gregl |
3.1 |
} |