1 |
gwlarson |
3.19 |
/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
2 |
gregl |
3.1 |
|
3 |
|
|
#ifndef lint |
4 |
|
|
static char SCCSid[] = "$SunId$ SGI"; |
5 |
|
|
#endif |
6 |
|
|
|
7 |
|
|
/* |
8 |
|
|
* Holodeck display process communication |
9 |
|
|
*/ |
10 |
|
|
|
11 |
|
|
#include "rholo.h" |
12 |
|
|
#include "rhdisp.h" |
13 |
gregl |
3.2 |
#include <sys/uio.h> |
14 |
gregl |
3.1 |
|
15 |
gregl |
3.2 |
#ifndef HDSUF |
16 |
gregl |
3.16 |
#define HDSUF ".hdi" |
17 |
gregl |
3.2 |
#endif |
18 |
gregl |
3.1 |
|
19 |
gregl |
3.2 |
static int inp_flags; |
20 |
|
|
static int dpd[3]; |
21 |
gregl |
3.5 |
static FILE *dpout; |
22 |
gregl |
3.2 |
|
23 |
|
|
|
24 |
|
|
disp_open(dname) /* open the named display driver */ |
25 |
gregl |
3.1 |
char *dname; |
26 |
|
|
{ |
27 |
gregl |
3.11 |
char dpath[128], fd0[8], fd1[8], *cmd[5]; |
28 |
gregl |
3.2 |
int i; |
29 |
gregl |
3.11 |
/* get full display program name */ |
30 |
gregl |
3.2 |
#ifdef DEVPATH |
31 |
|
|
sprintf(dpath, "%s/%s%s", DEVPATH, dname, HDSUF); |
32 |
|
|
#else |
33 |
|
|
sprintf(dpath, "dev/%s%s", dname, HDSUF); |
34 |
|
|
#endif |
35 |
gregl |
3.11 |
/* dup stdin and stdout */ |
36 |
|
|
if (readinp) |
37 |
|
|
sprintf(fd0, "%d", dup(0)); |
38 |
|
|
else |
39 |
|
|
strcpy(fd0, "-1"); |
40 |
|
|
sprintf(fd1, "%d", dup(1)); |
41 |
|
|
/* start the display process */ |
42 |
|
|
cmd[0] = dpath; |
43 |
|
|
cmd[1] = froot; cmd[2] = fd1; cmd[3] = fd0; |
44 |
|
|
cmd[4] = NULL; |
45 |
|
|
i = open_process(dpd, cmd); |
46 |
gregl |
3.6 |
if (i <= 0) |
47 |
gregl |
3.2 |
error(USER, "cannot start display process"); |
48 |
gregl |
3.11 |
if ((dpout = fdopen(dpd[1], "w")) == NULL) |
49 |
gregl |
3.5 |
error(SYSTEM, "cannot associate FILE with display pipe"); |
50 |
gregl |
3.11 |
dpd[1] = -1; /* causes ignored error in close_process() */ |
51 |
gregl |
3.2 |
inp_flags = 0; |
52 |
gregl |
3.11 |
/* close dup'ed stdin and stdout */ |
53 |
|
|
if (readinp) |
54 |
|
|
close(atoi(fd0)); |
55 |
|
|
close(atoi(fd1)); |
56 |
gregl |
3.17 |
/* check if outside */ |
57 |
|
|
if (vdef(OBSTRUCTIONS) && vbool(OBSTRUCTIONS)) |
58 |
|
|
disp_result(DS_OUTSECT, 0, NULL); |
59 |
gwlarson |
3.18 |
/* send eye separation if specified */ |
60 |
|
|
if (vdef(EYESEP)) { |
61 |
|
|
char fbuf[32]; |
62 |
|
|
sprintf(fbuf, "%.9e", vflt(EYESEP)); |
63 |
|
|
disp_result(DS_EYESEP, strlen(fbuf)+1, fbuf); |
64 |
|
|
} |
65 |
gregl |
3.2 |
/* write out hologram grids */ |
66 |
|
|
for (i = 0; hdlist[i] != NULL; i++) |
67 |
|
|
disp_result(DS_ADDHOLO, sizeof(HDGRID), (char *)hdlist[i]); |
68 |
gregl |
3.5 |
disp_flush(); |
69 |
gregl |
3.1 |
} |
70 |
|
|
|
71 |
|
|
|
72 |
gregl |
3.2 |
disp_packet(p) /* display a packet */ |
73 |
gregl |
3.4 |
register PACKHEAD *p; |
74 |
gregl |
3.2 |
{ |
75 |
gregl |
3.4 |
disp_result(DS_BUNDLE, packsiz(p->nr), (char *)p); |
76 |
gregl |
3.2 |
} |
77 |
|
|
|
78 |
|
|
|
79 |
gregl |
3.1 |
disp_check(block) /* check display process */ |
80 |
|
|
int block; |
81 |
|
|
{ |
82 |
gregl |
3.2 |
MSGHEAD msg; |
83 |
|
|
int n; |
84 |
|
|
char *buf = NULL; |
85 |
|
|
|
86 |
gregl |
3.6 |
if (dpout == NULL) |
87 |
gregl |
3.2 |
return(-1); |
88 |
gregl |
3.5 |
/* flush display output */ |
89 |
|
|
disp_flush(); |
90 |
gregl |
3.3 |
/* check read blocking */ |
91 |
gregl |
3.2 |
if (block != (inp_flags == 0)) { |
92 |
|
|
inp_flags = block ? 0 : FNONBLK; |
93 |
|
|
if (fcntl(dpd[0], F_SETFL, inp_flags) < 0) |
94 |
|
|
goto fcntlerr; |
95 |
|
|
} |
96 |
|
|
/* read message header */ |
97 |
|
|
n = read(dpd[0], (char *)&msg, sizeof(MSGHEAD)); |
98 |
|
|
if (n != sizeof(MSGHEAD)) { |
99 |
gregl |
3.10 |
if (n >= 0) { |
100 |
|
|
dpout = NULL; |
101 |
gregl |
3.2 |
error(USER, "display process died"); |
102 |
gregl |
3.10 |
} |
103 |
gregl |
3.2 |
if (errno != EAGAIN & errno != EINTR) |
104 |
|
|
goto readerr; |
105 |
gregl |
3.3 |
return(2); /* acceptable failure */ |
106 |
gregl |
3.2 |
} |
107 |
|
|
if (msg.nbytes) { /* get the message body */ |
108 |
gwlarson |
3.20 |
if (msg.nbytes < 0) |
109 |
|
|
error(INTERNAL, "anti-message from display process"); |
110 |
gregl |
3.2 |
buf = (char *)malloc(msg.nbytes); |
111 |
|
|
if (buf == NULL) |
112 |
|
|
error(SYSTEM, "out of memory in disp_check"); |
113 |
gwlarson |
3.19 |
if (inp_flags != 0 && fcntl(dpd[0], F_SETFL, inp_flags=0) < 0) |
114 |
gregl |
3.2 |
goto fcntlerr; |
115 |
|
|
if (readbuf(dpd[0], buf, msg.nbytes) != msg.nbytes) |
116 |
|
|
goto readerr; |
117 |
|
|
} |
118 |
|
|
switch (msg.type) { /* take appropriate action */ |
119 |
gregl |
3.12 |
case DR_BUNDLE: /* new bundle to calculate */ |
120 |
gregl |
3.2 |
if (msg.nbytes != sizeof(PACKHEAD)) |
121 |
|
|
error(INTERNAL, "bad DR_BUNDLE from display process"); |
122 |
|
|
bundle_set(BS_ADD, (PACKHEAD *)buf, 1); |
123 |
|
|
break; |
124 |
gregl |
3.12 |
case DR_NEWSET: /* new calculation set */ |
125 |
gregl |
3.2 |
if (msg.nbytes % sizeof(PACKHEAD)) |
126 |
|
|
error(INTERNAL, "bad DR_NEWSET from display process"); |
127 |
gwlarson |
3.19 |
if (msg.nbytes) |
128 |
|
|
disp_result(DS_STARTIMM, 0, NULL); |
129 |
gregl |
3.2 |
bundle_set(BS_NEW, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); |
130 |
gwlarson |
3.19 |
if (msg.nbytes) { |
131 |
|
|
disp_result(DS_ENDIMM, 0, NULL); |
132 |
|
|
disp_flush(); |
133 |
|
|
} |
134 |
gregl |
3.2 |
break; |
135 |
gregl |
3.12 |
case DR_ADDSET: /* add to calculation set */ |
136 |
gwlarson |
3.19 |
if (!msg.nbytes) |
137 |
|
|
break; |
138 |
gregl |
3.2 |
if (msg.nbytes % sizeof(PACKHEAD)) |
139 |
|
|
error(INTERNAL, "bad DR_ADDSET from display process"); |
140 |
|
|
disp_result(DS_STARTIMM, 0, NULL); |
141 |
|
|
bundle_set(BS_ADD, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); |
142 |
|
|
disp_result(DS_ENDIMM, 0, NULL); |
143 |
gregl |
3.15 |
disp_flush(); |
144 |
gregl |
3.2 |
break; |
145 |
gregl |
3.12 |
case DR_ADJSET: /* adjust calculation set members */ |
146 |
gwlarson |
3.19 |
if (!msg.nbytes) |
147 |
|
|
break; |
148 |
gregl |
3.9 |
if (msg.nbytes % sizeof(PACKHEAD)) |
149 |
|
|
error(INTERNAL, "bad DR_ADJSET from display process"); |
150 |
|
|
disp_result(DS_STARTIMM, 0, NULL); |
151 |
|
|
bundle_set(BS_ADJ, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); |
152 |
|
|
disp_result(DS_ENDIMM, 0, NULL); |
153 |
|
|
disp_flush(); |
154 |
|
|
break; |
155 |
gregl |
3.12 |
case DR_DELSET: /* delete from calculation set */ |
156 |
gwlarson |
3.19 |
if (!msg.nbytes) |
157 |
|
|
break; |
158 |
gregl |
3.2 |
if (msg.nbytes % sizeof(PACKHEAD)) |
159 |
|
|
error(INTERNAL, "bad DR_DELSET from display process"); |
160 |
|
|
bundle_set(BS_DEL, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); |
161 |
|
|
break; |
162 |
gregl |
3.12 |
case DR_ATTEN: /* block for priority request */ |
163 |
gregl |
3.2 |
if (msg.nbytes) |
164 |
|
|
error(INTERNAL, "bad DR_ATTEN from display process"); |
165 |
|
|
/* send acknowledgement */ |
166 |
|
|
disp_result(DS_ACKNOW, 0, NULL); |
167 |
gregl |
3.3 |
return(disp_check(1)); /* block on following request */ |
168 |
gregl |
3.13 |
case DR_KILL: /* kill computation process(es) */ |
169 |
|
|
if (msg.nbytes) |
170 |
|
|
error(INTERNAL, "bad DR_KILL from display process"); |
171 |
gregl |
3.14 |
if (nprocs > 0) |
172 |
|
|
done_rtrace(); |
173 |
|
|
else |
174 |
gregl |
3.13 |
error(WARNING, "no rtrace process to kill"); |
175 |
|
|
break; |
176 |
|
|
case DR_RESTART: /* restart computation process(es) */ |
177 |
|
|
if (msg.nbytes) |
178 |
|
|
error(INTERNAL, "bad DR_RESTART from display process"); |
179 |
gregl |
3.14 |
if (ncprocs > nprocs) |
180 |
|
|
new_rtrace(); |
181 |
|
|
else if (nprocs > 0) |
182 |
gregl |
3.13 |
error(WARNING, "rtrace already runnning"); |
183 |
|
|
else |
184 |
|
|
error(WARNING, "holodeck not open for writing"); |
185 |
|
|
break; |
186 |
|
|
case DR_CLOBBER: /* clobber holodeck */ |
187 |
|
|
if (msg.nbytes) |
188 |
|
|
error(INTERNAL, "bad DR_CLOBBER from display process"); |
189 |
|
|
if (!force || !ncprocs) |
190 |
|
|
error(WARNING, "request to clobber holodeck denied"); |
191 |
|
|
else { |
192 |
|
|
error(WARNING, "clobbering holodeck contents"); |
193 |
|
|
hdclobber(NULL); |
194 |
|
|
} |
195 |
|
|
break; |
196 |
gregl |
3.12 |
case DR_SHUTDOWN: /* shut down program */ |
197 |
gregl |
3.2 |
if (msg.nbytes) |
198 |
|
|
error(INTERNAL, "bad DR_SHUTDOWN from display process"); |
199 |
|
|
return(0); /* zero return signals shutdown */ |
200 |
gregl |
3.12 |
case DR_NOOP: /* do nothing */ |
201 |
gregl |
3.7 |
break; |
202 |
gregl |
3.2 |
default: |
203 |
|
|
error(INTERNAL, "unrecognized request from display process"); |
204 |
|
|
} |
205 |
gregl |
3.3 |
if (msg.nbytes) /* clean up */ |
206 |
gregl |
3.2 |
free(buf); |
207 |
|
|
return(1); /* normal return value */ |
208 |
|
|
fcntlerr: |
209 |
|
|
error(SYSTEM, "cannot change display blocking mode"); |
210 |
|
|
readerr: |
211 |
|
|
error(SYSTEM, "error reading from display process"); |
212 |
gregl |
3.1 |
} |
213 |
|
|
|
214 |
|
|
|
215 |
gregl |
3.2 |
int |
216 |
|
|
disp_close() /* close our display process */ |
217 |
gregl |
3.1 |
{ |
218 |
gregl |
3.2 |
int rval; |
219 |
|
|
|
220 |
gregl |
3.6 |
if (dpout == NULL) |
221 |
gregl |
3.2 |
return(-1); |
222 |
|
|
disp_result(DS_SHUTDOWN, 0, NULL); |
223 |
gregl |
3.5 |
fclose(dpout); |
224 |
|
|
dpout = NULL; |
225 |
gregl |
3.2 |
return(close_process(dpd)); |
226 |
|
|
} |
227 |
|
|
|
228 |
|
|
|
229 |
gregl |
3.5 |
disp_result(type, nbytes, p) /* queue result message to display process */ |
230 |
gregl |
3.2 |
int type, nbytes; |
231 |
|
|
char *p; |
232 |
|
|
{ |
233 |
|
|
MSGHEAD msg; |
234 |
gwlarson |
3.20 |
/* consistency checks */ |
235 |
|
|
#ifdef DEBUG |
236 |
|
|
if (nbytes < 0 || nbytes > 0 & p == NULL) |
237 |
|
|
error(CONSISTENCY, "bad buffer handed to disp_result"); |
238 |
|
|
#endif |
239 |
gregl |
3.6 |
if (dpout == NULL) |
240 |
|
|
return; |
241 |
gregl |
3.2 |
msg.type = type; |
242 |
|
|
msg.nbytes = nbytes; |
243 |
gregl |
3.5 |
fwrite((char *)&msg, sizeof(MSGHEAD), 1, dpout); |
244 |
|
|
if (nbytes > 0) |
245 |
|
|
fwrite(p, 1, nbytes, dpout); |
246 |
|
|
} |
247 |
|
|
|
248 |
|
|
|
249 |
|
|
disp_flush() /* flush output to display */ |
250 |
|
|
{ |
251 |
|
|
if (fflush(dpout) < 0) |
252 |
|
|
error(SYSTEM, "error writing to the display process"); |
253 |
gregl |
3.1 |
} |