| 30 |
|
* between processes. Rays are then traced using a simple |
| 31 |
|
* queuing mechanism, explained below. |
| 32 |
|
* |
| 33 |
< |
* The ray queue holds at least RAYQLEN rays, up to |
| 34 |
< |
* as many rays as there are rendering processes. |
| 33 |
> |
* The ray queue buffers RAYQLEN rays before sending to |
| 34 |
> |
* children, each of which may internally buffer RAYQLEN rays. |
| 35 |
> |
* |
| 36 |
|
* Rays are queued and returned by a single |
| 37 |
|
* ray_pqueue() call. A ray_pqueue() return |
| 38 |
|
* value of 0 indicates that no rays are ready |
| 246 |
|
if (sendq_full() && ray_pflush() <= 0) |
| 247 |
|
error(INTERNAL, "ray_pflush failed in ray_psend"); |
| 248 |
|
|
| 249 |
< |
r_queue[r_send_next] = *r; |
| 249 |
< |
r_send_next++; |
| 249 |
> |
r_queue[r_send_next++] = *r; |
| 250 |
|
} |
| 251 |
|
|
| 252 |
|
|
| 265 |
|
/* wait for a result */ |
| 266 |
|
rval = ray_presult(r, 0); |
| 267 |
|
/* put new ray in queue */ |
| 268 |
< |
r_queue[r_send_next] = mySend; |
| 269 |
< |
r_send_next++; |
| 268 |
> |
r_queue[r_send_next++] = mySend; |
| 269 |
|
return(rval); /* done */ |
| 270 |
|
} |
| 271 |
|
/* else add ray to send queue */ |
| 272 |
< |
r_queue[r_send_next] = *r; |
| 274 |
< |
r_send_next++; |
| 272 |
> |
r_queue[r_send_next++] = *r; |
| 273 |
|
/* check for returned ray... */ |
| 274 |
|
if (r_recv_first >= r_recv_next) |
| 275 |
|
return(0); |
| 276 |
|
/* ...one is sitting in queue */ |
| 277 |
< |
*r = r_queue[r_recv_first]; |
| 280 |
< |
r_recv_first++; |
| 277 |
> |
*r = r_queue[r_recv_first++]; |
| 278 |
|
return(1); |
| 279 |
|
} |
| 280 |
|
|
| 294 |
|
return(0); |
| 295 |
|
/* check queued results first */ |
| 296 |
|
if (r_recv_first < r_recv_next) { |
| 297 |
< |
*r = r_queue[r_recv_first]; |
| 298 |
< |
r_recv_first++; |
| 297 |
> |
*r = r_queue[r_recv_first++]; |
| 298 |
> |
/* make sure send queue has room */ |
| 299 |
> |
if (sendq_full() && ray_pflush() <= 0) |
| 300 |
> |
return(-1); |
| 301 |
|
return(1); |
| 302 |
|
} |
| 303 |
|
n = ray_pnprocs - ray_pnidle; /* pending before flush? */ |
| 311 |
|
n = ray_pnprocs - ray_pnidle; |
| 312 |
|
if (n <= 0) /* return if nothing to await */ |
| 313 |
|
return(0); |
| 314 |
+ |
if (!poll && ray_pnprocs == 1) /* one process -> skip select() */ |
| 315 |
+ |
FD_SET(r_proc[0].fd_recv, &readset); |
| 316 |
+ |
|
| 317 |
|
getready: /* any children waiting for us? */ |
| 318 |
|
for (pn = ray_pnprocs; pn--; ) |
| 319 |
|
if (FD_ISSET(r_proc[pn].fd_recv, &readset) || |
| 402 |
|
{ |
| 403 |
|
int n; |
| 404 |
|
register int i; |
| 405 |
+ |
/* flag child process for quit() */ |
| 406 |
+ |
ray_pnprocs = -1; |
| 407 |
|
/* read each ray request set */ |
| 408 |
|
while ((n = read(fd_in, (char *)r_queue, sizeof(r_queue))) > 0) { |
| 409 |
|
int n2; |
| 527 |
|
quit(ec) /* make sure exit is called */ |
| 528 |
|
int ec; |
| 529 |
|
{ |
| 530 |
+ |
if (ray_pnprocs > 0) /* close children if any */ |
| 531 |
+ |
ray_pclose(0); |
| 532 |
|
exit(ec); |
| 533 |
|
} |
