| 1 | – | /* Copyright (c) 1998 Silicon Graphics, Inc. */ | 
| 2 | – |  | 
| 1 |  | #ifndef lint | 
| 2 | < | static char SCCSid[] = "$SunId$ SGI"; | 
| 2 | > | static const char       RCSid[] = "$Id$"; | 
| 3 |  | #endif | 
| 6 | – |  | 
| 4 |  | /* | 
| 5 |  | * Holodeck display process communication | 
| 6 |  | */ | 
| 7 |  |  | 
| 8 |  | #include "rholo.h" | 
| 9 |  | #include "rhdisp.h" | 
| 10 | + | #include "rtprocess.h" | 
| 11 |  | #include <sys/uio.h> | 
| 12 | + | #include <string.h> | 
| 13 |  |  | 
| 14 |  | #ifndef HDSUF | 
| 15 | < | #define HDSUF   ".hdi" | 
| 15 | > | #define HDSUF           ".hdi" | 
| 16 |  | #endif | 
| 17 | + | #ifndef SLAVENAME | 
| 18 | + | #define SLAVENAME       "slave" | 
| 19 | + | #endif | 
| 20 |  |  | 
| 21 |  | #ifndef FNONBLK | 
| 22 |  | #define FNONBLK         O_NONBLOCK | 
| 23 |  | #endif | 
| 24 |  |  | 
| 25 |  | static int      inp_flags; | 
| 26 | < | static int      dpd[3]; | 
| 26 | > | static SUBPROC  dpd = SP_INACTIVE; | 
| 27 |  | static FILE     *dpout; | 
| 28 |  |  | 
| 29 | + | static void disp_flush(void); | 
| 30 | + | static void disp_result(int type, int nbytes, char *p); | 
| 31 |  |  | 
| 32 | < | disp_open(dname)                /* open the named display driver */ | 
| 33 | < | char    *dname; | 
| 32 | > |  | 
| 33 | > | void | 
| 34 | > | disp_open(              /* open the named display driver */ | 
| 35 | > | char    *dname | 
| 36 | > | ) | 
| 37 |  | { | 
| 38 | < | char    dpath[128], fd0[8], fd1[8], *cmd[5]; | 
| 39 | < | int     i; | 
| 40 | < | /* get full display program name */ | 
| 38 | > | char    buf[sizeof(HDGRID)+512], fd0[8], fd1[8], *cmd[5], *sfn; | 
| 39 | > | int     i, n, len; | 
| 40 | > |  | 
| 41 | > | if (!strcmp(dname, SLAVENAME)) { | 
| 42 | > | dpd.r = 0;              /* read from stdin */ | 
| 43 | > | dpout = stdout;         /* write to stdout */ | 
| 44 | > | dpd.flags = 0;          /* we're the slave procees */ | 
| 45 | > | } else { | 
| 46 | > | /* get full display program name */ | 
| 47 |  | #ifdef DEVPATH | 
| 48 | < | sprintf(dpath, "%s/%s%s", DEVPATH, dname, HDSUF); | 
| 48 | > | sprintf(buf, "%s/%s%s", DEVPATH, dname, HDSUF); | 
| 49 |  | #else | 
| 50 | < | sprintf(dpath, "dev/%s%s", dname, HDSUF); | 
| 50 | > | sprintf(buf, "dev/%s%s", dname, HDSUF); | 
| 51 |  | #endif | 
| 52 | < | /* dup stdin and stdout */ | 
| 53 | < | if (readinp) | 
| 54 | < | sprintf(fd0, "%d", dup(0)); | 
| 55 | < | else | 
| 56 | < | strcpy(fd0, "-1"); | 
| 57 | < | sprintf(fd1, "%d", dup(1)); | 
| 58 | < | /* start the display process */ | 
| 59 | < | cmd[0] = dpath; | 
| 60 | < | cmd[1] = froot; cmd[2] = fd1; cmd[3] = fd0; | 
| 61 | < | cmd[4] = NULL; | 
| 62 | < | i = open_process(dpd, cmd); | 
| 63 | < | if (i <= 0) | 
| 64 | < | error(USER, "cannot start display process"); | 
| 65 | < | if ((dpout = fdopen(dpd[1], "w")) == NULL) | 
| 66 | < | error(SYSTEM, "cannot associate FILE with display pipe"); | 
| 67 | < | dpd[1] = -1;            /* causes ignored error in close_process() */ | 
| 52 | > | /* dup stdin and stdout */ | 
| 53 | > | if (readinp) | 
| 54 | > | sprintf(fd0, "%d", dup(0)); | 
| 55 | > | else | 
| 56 | > | strcpy(fd0, "-1"); | 
| 57 | > | sprintf(fd1, "%d", dup(1)); | 
| 58 | > | /* start the display process */ | 
| 59 | > | cmd[0] = buf; | 
| 60 | > | cmd[1] = froot; cmd[2] = fd1; cmd[3] = fd0; | 
| 61 | > | cmd[4] = NULL; | 
| 62 | > | i = open_process(&dpd, cmd); | 
| 63 | > | if (i <= 0) | 
| 64 | > | error(USER, "cannot start display process"); | 
| 65 | > | if ((dpout = fdopen(dpd.w, "w")) == NULL) | 
| 66 | > | error(SYSTEM, "problem opening display pipe"); | 
| 67 | > | /* close dup'ed stdin and stdout */ | 
| 68 | > | if (readinp) | 
| 69 | > | close(atoi(fd0)); | 
| 70 | > | close(atoi(fd1)); | 
| 71 | > | } | 
| 72 | > | dpd.w = -1;             /* causes ignored error in close_process() */ | 
| 73 |  | inp_flags = 0; | 
| 56 | – | /* close dup'ed stdin and stdout */ | 
| 57 | – | if (readinp) | 
| 58 | – | close(atoi(fd0)); | 
| 59 | – | close(atoi(fd1)); | 
| 74 |  | /* check if outside */ | 
| 75 |  | if (vdef(OBSTRUCTIONS) && vbool(OBSTRUCTIONS)) | 
| 76 |  | disp_result(DS_OUTSECT, 0, NULL); | 
| 77 |  | /* send eye separation if specified */ | 
| 78 |  | if (vdef(EYESEP)) { | 
| 79 | < | char    fbuf[32]; | 
| 80 | < | sprintf(fbuf, "%.9e", vflt(EYESEP)); | 
| 67 | < | disp_result(DS_EYESEP, strlen(fbuf)+1, fbuf); | 
| 79 | > | sprintf(buf, "%.9e", vflt(EYESEP)); | 
| 80 | > | disp_result(DS_EYESEP, strlen(buf)+1, buf); | 
| 81 |  | } | 
| 82 | < | /* write out hologram grids */ | 
| 83 | < | for (i = 0; hdlist[i] != NULL; i++) | 
| 84 | < | disp_result(DS_ADDHOLO, sizeof(HDGRID), (char *)hdlist[i]); | 
| 82 | > | /* write out hologram grids & octrees */ | 
| 83 | > | for (i = 0; hdlist[i] != NULL; i++) { | 
| 84 | > | memcpy(buf, (void *)hdlist[i], sizeof(HDGRID)); | 
| 85 | > | len = sizeof(HDGRID); | 
| 86 | > | n = vdef(GEOMETRY); | 
| 87 | > | sfn = i<n ? nvalue(GEOMETRY,i) : | 
| 88 | > | n ? nvalue(GEOMETRY,n-1) : vval(OCTREE); | 
| 89 | > | strcpy(buf+len, sfn); | 
| 90 | > | len += strlen(sfn) + 1; | 
| 91 | > | n = vdef(PORTS); | 
| 92 | > | sfn = i<n ? nvalue(PORTS,i) : n ? nvalue(PORTS,n-1) : ""; | 
| 93 | > | strcpy(buf+len, sfn); | 
| 94 | > | len += strlen(sfn) + 1; | 
| 95 | > | disp_result(DS_ADDHOLO, len, buf); | 
| 96 | > | } | 
| 97 |  | disp_flush(); | 
| 98 |  | } | 
| 99 |  |  | 
| 100 |  |  | 
| 101 | < | disp_packet(p)                  /* display a packet */ | 
| 102 | < | register PACKHEAD       *p; | 
| 101 | > | void | 
| 102 | > | disp_packet(                    /* display a packet */ | 
| 103 | > | PACKHEAD        *p | 
| 104 | > | ) | 
| 105 |  | { | 
| 106 |  | disp_result(DS_BUNDLE, packsiz(p->nr), (char *)p); | 
| 107 |  | } | 
| 108 |  |  | 
| 109 |  |  | 
| 110 | < | disp_check(block)               /* check display process */ | 
| 111 | < | int     block; | 
| 110 | > | int | 
| 111 | > | disp_check(             /* check display process */ | 
| 112 | > | int     block | 
| 113 | > | ) | 
| 114 |  | { | 
| 115 |  | MSGHEAD msg; | 
| 116 |  | int     n; | 
| 123 |  | /* check read blocking */ | 
| 124 |  | if (block != (inp_flags == 0)) { | 
| 125 |  | inp_flags = block ? 0 : FNONBLK; | 
| 126 | < | if (fcntl(dpd[0], F_SETFL, inp_flags) < 0) | 
| 126 | > | if (fcntl(dpd.r, F_SETFL, inp_flags) < 0) | 
| 127 |  | goto fcntlerr; | 
| 128 |  | } | 
| 129 |  | /* read message header */ | 
| 130 | < | n = read(dpd[0], (char *)&msg, sizeof(MSGHEAD)); | 
| 130 | > | n = read(dpd.r, (char *)&msg, sizeof(MSGHEAD)); | 
| 131 |  | if (n != sizeof(MSGHEAD)) { | 
| 132 |  | if (n >= 0) { | 
| 133 |  | dpout = NULL; | 
| 134 |  | error(USER, "display process died"); | 
| 135 |  | } | 
| 136 | < | if (errno != EAGAIN & errno != EINTR) | 
| 136 | > | if ((errno != EAGAIN) & (errno != EINTR)) | 
| 137 |  | goto readerr; | 
| 138 |  | return(2);              /* acceptable failure */ | 
| 139 |  | } | 
| 143 |  | buf = (char *)malloc(msg.nbytes); | 
| 144 |  | if (buf == NULL) | 
| 145 |  | error(SYSTEM, "out of memory in disp_check"); | 
| 146 | < | if (inp_flags != 0 && fcntl(dpd[0], F_SETFL, inp_flags=0) < 0) | 
| 146 | > | if (inp_flags != 0 && fcntl(dpd.r, F_SETFL, inp_flags=0) < 0) | 
| 147 |  | goto fcntlerr; | 
| 148 | < | if (readbuf(dpd[0], buf, msg.nbytes) != msg.nbytes) | 
| 148 | > | if (readbuf(dpd.r, buf, msg.nbytes) != msg.nbytes) | 
| 149 |  | goto readerr; | 
| 150 |  | } | 
| 151 |  | switch (msg.type) {             /* take appropriate action */ | 
| 192 |  | error(INTERNAL, "bad DR_DELSET from display process"); | 
| 193 |  | bundle_set(BS_DEL, (PACKHEAD *)buf, msg.nbytes/sizeof(PACKHEAD)); | 
| 194 |  | break; | 
| 195 | + | case DR_VIEWPOINT:      /* set target eye position */ | 
| 196 | + | if (msg.nbytes != sizeof(VIEWPOINT)) | 
| 197 | + | error(INTERNAL, "bad DR_VIEWPOINT from display process"); | 
| 198 | + | myeye = *((VIEWPOINT *)buf); | 
| 199 | + | break; | 
| 200 |  | case DR_ATTEN:          /* block for priority request */ | 
| 201 |  | if (msg.nbytes) | 
| 202 |  | error(INTERNAL, "bad DR_ATTEN from display process"); | 
| 224 |  | case DR_CLOBBER:        /* clobber holodeck */ | 
| 225 |  | if (msg.nbytes) | 
| 226 |  | error(INTERNAL, "bad DR_CLOBBER from display process"); | 
| 227 | < | if (!force || !ncprocs) | 
| 227 | > | if ((force <= 0) | (ncprocs <= 0)) | 
| 228 |  | error(WARNING, "request to clobber holodeck denied"); | 
| 229 |  | else { | 
| 230 |  | error(WARNING, "clobbering holodeck contents"); | 
| 247 |  | error(SYSTEM, "cannot change display blocking mode"); | 
| 248 |  | readerr: | 
| 249 |  | error(SYSTEM, "error reading from display process"); | 
| 250 | + | return -1; /* pro forma return */ | 
| 251 |  | } | 
| 252 |  |  | 
| 253 |  |  | 
| 254 |  | int | 
| 255 | < | disp_close()                    /* close our display process */ | 
| 255 | > | disp_close(void)                        /* close our display process */ | 
| 256 |  | { | 
| 222 | – | int     rval; | 
| 223 | – |  | 
| 257 |  | if (dpout == NULL) | 
| 258 |  | return(-1); | 
| 259 | + | myeye.rng = 0; | 
| 260 |  | disp_result(DS_SHUTDOWN, 0, NULL); | 
| 261 |  | fclose(dpout); | 
| 262 |  | dpout = NULL; | 
| 263 | < | return(close_process(dpd)); | 
| 263 | > | return(dpd.flags&PF_RUNNING ? close_process(&dpd) : 0); | 
| 264 | > |  | 
| 265 |  | } | 
| 266 |  |  | 
| 267 |  |  | 
| 268 | < | disp_result(type, nbytes, p)    /* queue result message to display process */ | 
| 269 | < | int     type, nbytes; | 
| 270 | < | char    *p; | 
| 268 | > | static void | 
| 269 | > | disp_result(    /* queue result message to display process */ | 
| 270 | > | int     type, | 
| 271 | > | int     nbytes, | 
| 272 | > | char    *p | 
| 273 | > | ) | 
| 274 |  | { | 
| 275 |  | MSGHEAD msg; | 
| 276 |  | /* consistency checks */ | 
| 282 |  | return; | 
| 283 |  | msg.type = type; | 
| 284 |  | msg.nbytes = nbytes; | 
| 285 | < | fwrite((char *)&msg, sizeof(MSGHEAD), 1, dpout); | 
| 285 | > | putbinary(&msg, sizeof(MSGHEAD), 1, dpout); | 
| 286 |  | if (nbytes > 0) | 
| 287 | < | fwrite(p, 1, nbytes, dpout); | 
| 287 | > | putbinary(p, 1, nbytes, dpout); | 
| 288 |  | } | 
| 289 |  |  | 
| 290 |  |  | 
| 291 | < | disp_flush()                    /* flush output to display */ | 
| 291 | > | static void | 
| 292 | > | disp_flush(void)                        /* flush output to display */ | 
| 293 |  | { | 
| 294 |  | if (fflush(dpout) < 0) | 
| 295 |  | error(SYSTEM, "error writing to the display process"); |