6 |
|
* Controlling process for multiple children |
7 |
|
*/ |
8 |
|
|
9 |
+ |
#include <signal.h> |
10 |
|
#include "rcontrib.h" |
10 |
– |
#include "platform.h" |
11 |
– |
#include "rtprocess.h" |
11 |
|
#include "selcall.h" |
12 |
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|
13 |
+ |
#define MAXIQ (int)(PIPE_BUF/(sizeof(FVECT)*2)) |
14 |
+ |
|
15 |
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/* Modifier contribution queue (results waiting to be output) */ |
16 |
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typedef struct s_binq { |
17 |
|
RNUMBER ndx; /* index for this entry */ |
23 |
|
static BINQ *out_bq = NULL; /* output bin queue */ |
24 |
|
static BINQ *free_bq = NULL; /* free queue entries */ |
25 |
|
|
26 |
+ |
static SUBPROC kidpr[MAXPROCESS]; /* our child processes */ |
27 |
+ |
|
28 |
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static struct { |
29 |
|
RNUMBER r1; /* assigned ray starting index */ |
27 |
– |
SUBPROC pr; /* PID, i/o descriptors */ |
30 |
|
FILE *infp; /* file pointer to read from process */ |
31 |
< |
int nr; /* number rays to sum (0 if free) */ |
32 |
< |
} kida[MAXPROCESS]; /* our child processes */ |
31 |
> |
int nr; /* number of rays to sum (0 if free) */ |
32 |
> |
} kida[MAXPROCESS]; /* our child process i/o */ |
33 |
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|
34 |
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|
35 |
|
/* Get new bin queue entry */ |
89 |
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/* for (i = nmods; i--; ) |
90 |
|
memset(bp->mca[i]->cbin, 0, sizeof(DCOLOR)*bp->mca[i]->nbins); |
91 |
|
*/ |
92 |
+ |
if (bp->next != NULL) |
93 |
+ |
error(CONSISTENCY, "free_binq() handed list"); |
94 |
|
bp->ndx = 0; |
95 |
|
bp->next = free_bq; /* push onto free list */ |
96 |
|
free_bq = bp; |
98 |
|
|
99 |
|
|
100 |
|
/* Add modifier values to accumulation record in queue and clear */ |
101 |
< |
void |
101 |
> |
static void |
102 |
|
queue_modifiers() |
103 |
|
{ |
104 |
|
MODCONT *mpin, *mpout; |
150 |
|
} |
151 |
|
return; |
152 |
|
} |
153 |
< |
b_last = NULL; /* else insert in output queue */ |
153 |
> |
b_last = NULL; /* insert in output queue */ |
154 |
|
for (b_cur = out_bq; b_cur != NULL && b_cur->ndx < bp->ndx; |
155 |
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b_cur = b_cur->next) |
156 |
|
b_last = b_cur; |
188 |
|
int nready = 0; |
189 |
|
BINQ *bp; |
190 |
|
|
187 |
– |
if (accumulate <= 0) /* just accumulating? */ |
188 |
– |
return(0); |
189 |
– |
|
191 |
|
for (bp = out_bq; bp != NULL && bp->nadded >= accumulate && |
192 |
|
bp->ndx == lastdone+nready*accumulate+1; |
193 |
|
bp = bp->next) |
204 |
|
int nout = 0; |
205 |
|
BINQ *bp; |
206 |
|
int i; |
207 |
< |
|
207 |
< |
if (accumulate <= 0) /* just accumulating? */ |
208 |
< |
return(0); |
209 |
< |
/* else output ready results */ |
207 |
> |
/* output ready results */ |
208 |
|
while (out_bq != NULL && out_bq->nadded >= accumulate |
209 |
|
&& out_bq->ndx == lastdone+1) { |
210 |
|
if ((nmax > 0) & (nout >= nmax)) |
250 |
|
bq->nadded = kida[k].nr; |
251 |
|
/* read from child */ |
252 |
|
for (j = 0; j < nmods; j++) |
253 |
< |
if (fread(bq->mca[j]->cbin, sizeof(DCOLOR), bq->mca[j]->nbins, |
253 |
> |
if (getbinary(bq->mca[j]->cbin, sizeof(DCOLOR), bq->mca[j]->nbins, |
254 |
|
kida[k].infp) != bq->mca[j]->nbins) |
255 |
|
error(SYSTEM, "read error from render process"); |
256 |
|
|
268 |
|
} |
269 |
|
|
270 |
|
|
271 |
< |
/* Start child processes if we can */ |
271 |
> |
/* Start child processes if we can (call only once in parent!) */ |
272 |
|
int |
273 |
|
in_rchild() |
274 |
|
{ |
276 |
|
|
277 |
|
while (nchild < nproc) { /* fork until target reached */ |
278 |
|
errno = 0; |
279 |
< |
rval = open_process(&kida[nchild].pr, NULL); |
279 |
> |
rval = open_process(&kidpr[nchild], NULL); |
280 |
|
if (rval < 0) |
281 |
|
error(SYSTEM, "open_process() call failed"); |
282 |
|
if (rval == 0) { /* if in child, set up & return true */ |
283 |
< |
lu_doall(&modconttab, set_stdout, NULL); |
283 |
> |
lu_doall(&modconttab, &set_stdout, NULL); |
284 |
|
lu_done(&ofiletab); |
285 |
|
while (nchild--) { /* don't share other pipes */ |
286 |
< |
close(kida[nchild].pr.w); |
286 |
> |
close(kidpr[nchild].w); |
287 |
|
fclose(kida[nchild].infp); |
288 |
|
} |
289 |
|
inpfmt = (sizeof(RREAL)==sizeof(double)) ? 'd' : 'f'; |
303 |
|
if (rval != PIPE_BUF) |
304 |
|
error(CONSISTENCY, "bad value from open_process()"); |
305 |
|
/* connect to child's output */ |
306 |
< |
kida[nchild].infp = fdopen(kida[nchild].pr.r, "rb"); |
306 |
> |
kida[nchild].infp = fdopen(kidpr[nchild].r, "rb"); |
307 |
|
if (kida[nchild].infp == NULL) |
308 |
|
error(SYSTEM, "out of memory in in_rchild()"); |
311 |
– |
#ifdef getc_unlocked |
312 |
– |
flockfile(kida[nchild].infp); /* avoid mutex overhead */ |
313 |
– |
#endif |
309 |
|
kida[nchild++].nr = 0; /* mark as available */ |
310 |
|
} |
311 |
+ |
#ifdef getc_unlocked |
312 |
+ |
for (rval = nchild; rval--; ) /* avoid mutex overhead */ |
313 |
+ |
flockfile(kida[rval].infp); |
314 |
+ |
#endif |
315 |
|
return(0); /* return "false" in parent */ |
316 |
|
} |
317 |
|
|
318 |
|
|
319 |
|
/* Close child processes */ |
320 |
|
void |
321 |
< |
end_children() |
321 |
> |
end_children(int immed) |
322 |
|
{ |
323 |
< |
int status; |
324 |
< |
|
325 |
< |
while (nchild > 0) { |
326 |
< |
nchild--; |
327 |
< |
if ((status = close_process(&kida[nchild].pr)) > 0) { |
328 |
< |
sprintf(errmsg, |
329 |
< |
"rendering process returned bad status (%d)", |
330 |
< |
status); |
323 |
> |
int i; |
324 |
> |
|
325 |
> |
#ifdef SIGKILL /* error mode -- quick exit */ |
326 |
> |
for (i = nchild*immed; i-- > 0; ) |
327 |
> |
kill(kidpr[nchild].pid, SIGKILL); |
328 |
> |
#endif |
329 |
> |
if ((i = close_processes(kidpr, nchild)) > 0 && !immed) { |
330 |
> |
sprintf(errmsg, "rendering process returned bad status (%d)", |
331 |
> |
i); |
332 |
|
error(WARNING, errmsg); |
333 |
– |
} |
334 |
– |
fclose(kida[nchild].infp); |
333 |
|
} |
334 |
+ |
while (nchild-- > 0) |
335 |
+ |
fclose(kida[nchild].infp); |
336 |
|
} |
337 |
|
|
338 |
|
|
366 |
|
n = nr = 0; |
367 |
|
for (i = nchild; i--; ) { |
368 |
|
if (kida[i].nr) { |
369 |
< |
FD_SET(kida[i].pr.r, &readset); |
369 |
> |
FD_SET(kidpr[i].r, &readset); |
370 |
|
++nr; |
371 |
|
} |
372 |
< |
FD_SET(kida[i].pr.r, &errset); |
373 |
< |
if (kida[i].pr.r >= n) |
374 |
< |
n = kida[i].pr.r + 1; |
372 |
> |
FD_SET(kidpr[i].r, &errset); |
373 |
> |
if (kidpr[i].r >= n) |
374 |
> |
n = kidpr[i].r + 1; |
375 |
|
} |
376 |
|
if (!nr) /* nothing to wait for? */ |
377 |
|
return(-1); |
388 |
|
FD_ZERO(&errset); |
389 |
|
n = -1; /* read results from child(ren) */ |
390 |
|
for (i = nchild; i--; ) { |
391 |
< |
if (FD_ISSET(kida[i].pr.r, &errset)) |
391 |
> |
if (FD_ISSET(kidpr[i].r, &errset)) |
392 |
|
error(USER, "rendering process died"); |
393 |
< |
if (FD_ISSET(kida[i].pr.r, &readset)) |
393 |
> |
if (FD_ISSET(kidpr[i].r, &readset)) |
394 |
|
queue_results(n = i); |
395 |
|
} |
396 |
|
return(n); /* first available child */ |
401 |
|
void |
402 |
|
parental_loop() |
403 |
|
{ |
404 |
< |
#define MAXIQ (int)(PIPE_BUF/(sizeof(FVECT)*2)) |
405 |
< |
static int ignore_warning_given = 0; |
406 |
< |
int qlimit = (accumulate == 1) ? 1 : MAXIQ-1; |
404 |
> |
const int qlimit = (accumulate == 1) ? 1 : MAXIQ-1; |
405 |
|
int ninq = 0; |
406 |
|
FVECT orgdir[2*MAXIQ]; |
407 |
|
int i, n; |
410 |
|
flockfile(stdin); /* avoid lock/unlock overhead */ |
411 |
|
#endif |
412 |
|
while (getvec(orgdir[2*ninq]) == 0 && getvec(orgdir[2*ninq+1]) == 0) { |
413 |
< |
if (orgdir[2*ninq+1][0] == 0.0 && /* asking for flush? */ |
414 |
< |
(orgdir[2*ninq+1][1] == 0.0) & |
415 |
< |
(orgdir[2*ninq+1][2] == 0.0)) { |
416 |
< |
if (accumulate != 1) { |
417 |
< |
if (!ignore_warning_given++) |
418 |
< |
error(WARNING, |
421 |
< |
"dummy ray(s) ignored during accumulation\n"); |
422 |
< |
continue; |
423 |
< |
} |
424 |
< |
while (next_child_nq(1) >= 0) |
425 |
< |
; /* clear the queue */ |
426 |
< |
lastdone = lastray = 0; |
427 |
< |
if ((yres <= 0) | (xres <= 0)) |
428 |
< |
waitflush = 1; /* flush next */ |
429 |
< |
put_zero_record(++lastray); |
430 |
< |
} else if (++ninq >= qlimit || accumulate > 1 && |
413 |
> |
const int zero_ray = orgdir[2*ninq+1][0] == 0.0 && |
414 |
> |
(orgdir[2*ninq+1][1] == 0.0) & |
415 |
> |
(orgdir[2*ninq+1][2] == 0.0); |
416 |
> |
ninq += !zero_ray; |
417 |
> |
/* Zero ray cannot go in input queue */ |
418 |
> |
if (zero_ray ? ninq : ninq >= qlimit || |
419 |
|
lastray/accumulate != (lastray+ninq)/accumulate) { |
420 |
|
i = next_child_nq(0); /* manages output */ |
421 |
|
n = ninq; |
422 |
< |
if (accumulate != 1) /* request flush? */ |
422 |
> |
if (accumulate > 1) /* need terminator? */ |
423 |
|
memset(orgdir[2*n++], 0, sizeof(FVECT)*2); |
424 |
|
n *= sizeof(FVECT)*2; /* send assignment */ |
425 |
< |
if (writebuf(kida[i].pr.w, (char *)orgdir, n) != n) |
425 |
> |
if (writebuf(kidpr[i].w, (char *)orgdir, n) != n) |
426 |
|
error(SYSTEM, "pipe write error"); |
427 |
|
kida[i].r1 = lastray+1; |
428 |
|
lastray += kida[i].nr = ninq; /* mark as busy */ |
441 |
– |
ninq = 0; |
429 |
|
if (lastray < lastdone) { /* RNUMBER wrapped? */ |
430 |
|
while (next_child_nq(1) >= 0) |
431 |
|
; |
432 |
< |
lastdone = lastray = 0; |
432 |
> |
lastray -= ninq; |
433 |
> |
lastdone = lastray %= accumulate; |
434 |
|
} |
435 |
+ |
ninq = 0; |
436 |
|
} |
437 |
< |
if (raysleft && !--raysleft) |
437 |
> |
if (zero_ray) { /* put bogus record? */ |
438 |
> |
if ((yres <= 0) | (xres <= 1) && |
439 |
> |
(lastray+1) % accumulate == 0) { |
440 |
> |
while (next_child_nq(1) >= 0) |
441 |
> |
; /* clear the queue */ |
442 |
> |
lastdone = lastray = accumulate-1; |
443 |
> |
waitflush = 1; /* flush next */ |
444 |
> |
} |
445 |
> |
put_zero_record(++lastray); |
446 |
> |
} |
447 |
> |
if (!morays()) |
448 |
|
break; /* preemptive EOI */ |
449 |
|
} |
450 |
|
while (next_child_nq(1) >= 0) /* empty results queue */ |
451 |
|
; |
452 |
< |
/* output accumulated record */ |
453 |
< |
if (accumulate <= 0 || account < accumulate) { |
454 |
< |
end_children(); /* frees up file descriptors */ |
456 |
< |
if (account < accumulate) { |
457 |
< |
error(WARNING, "partial accumulation in final record"); |
458 |
< |
accumulate -= account; |
459 |
< |
} |
460 |
< |
for (i = 0; i < nmods; i++) |
461 |
< |
mod_output(out_bq->mca[i]); |
462 |
< |
end_record(); |
463 |
< |
free_binq(out_bq); |
452 |
> |
if (account < accumulate) { |
453 |
> |
error(WARNING, "partial accumulation in final record"); |
454 |
> |
free_binq(out_bq); /* XXX just ignore it */ |
455 |
|
out_bq = NULL; |
456 |
|
} |
457 |
+ |
free_binq(NULL); /* clean up */ |
458 |
+ |
lu_done(&ofiletab); |
459 |
|
if (raysleft) |
460 |
|
error(USER, "unexpected EOF on input"); |
461 |
< |
free_binq(NULL); /* clean up */ |
461 |
> |
} |
462 |
> |
|
463 |
> |
|
464 |
> |
/* Wait for the next available child by monitoring "to" pipes */ |
465 |
> |
static int |
466 |
> |
next_child_ready() |
467 |
> |
{ |
468 |
> |
fd_set writeset, errset; |
469 |
> |
int i, n; |
470 |
> |
|
471 |
> |
for (i = nchild; i--; ) /* see if there's one free first */ |
472 |
> |
if (!kida[i].nr) |
473 |
> |
return(i); |
474 |
> |
/* prepare select() call */ |
475 |
> |
FD_ZERO(&writeset); FD_ZERO(&errset); |
476 |
> |
n = 0; |
477 |
> |
for (i = nchild; i--; ) { |
478 |
> |
FD_SET(kidpr[i].w, &writeset); |
479 |
> |
FD_SET(kidpr[i].r, &errset); |
480 |
> |
if (kidpr[i].w >= n) |
481 |
> |
n = kidpr[i].w + 1; |
482 |
> |
if (kidpr[i].r >= n) |
483 |
> |
n = kidpr[i].r + 1; |
484 |
> |
} |
485 |
> |
errno = 0; |
486 |
> |
n = select(n, NULL, &writeset, &errset, NULL); |
487 |
> |
if (n < 0) |
488 |
> |
error(SYSTEM, "select() error in next_child_ready()"); |
489 |
> |
n = -1; /* identify waiting child */ |
490 |
> |
for (i = nchild; i--; ) { |
491 |
> |
if (FD_ISSET(kidpr[i].r, &errset)) |
492 |
> |
error(USER, "rendering process died"); |
493 |
> |
if (FD_ISSET(kidpr[i].w, &writeset)) |
494 |
> |
kida[n = i].nr = 0; |
495 |
> |
} |
496 |
> |
return(n); /* first available child */ |
497 |
> |
} |
498 |
> |
|
499 |
> |
|
500 |
> |
/* Modified parental loop for full accumulation mode (-c 0) */ |
501 |
> |
void |
502 |
> |
feeder_loop() |
503 |
> |
{ |
504 |
> |
static int ignore_warning_given = 0; |
505 |
> |
int ninq = 0; |
506 |
> |
FVECT orgdir[2*MAXIQ]; |
507 |
> |
int i, n; |
508 |
> |
/* load rays from stdin & process */ |
509 |
> |
#ifdef getc_unlocked |
510 |
> |
flockfile(stdin); /* avoid lock/unlock overhead */ |
511 |
> |
#endif |
512 |
> |
while (getvec(orgdir[2*ninq]) == 0 && getvec(orgdir[2*ninq+1]) == 0) { |
513 |
> |
if (orgdir[2*ninq+1][0] == 0.0 && /* asking for flush? */ |
514 |
> |
(orgdir[2*ninq+1][1] == 0.0) & |
515 |
> |
(orgdir[2*ninq+1][2] == 0.0)) { |
516 |
> |
if (!ignore_warning_given++) |
517 |
> |
error(WARNING, |
518 |
> |
"dummy ray(s) ignored during accumulation\n"); |
519 |
> |
continue; |
520 |
> |
} |
521 |
> |
if (++ninq >= MAXIQ) { |
522 |
> |
i = next_child_ready(); /* get eager child */ |
523 |
> |
n = sizeof(FVECT)*2 * ninq; /* give assignment */ |
524 |
> |
if (writebuf(kidpr[i].w, (char *)orgdir, n) != n) |
525 |
> |
error(SYSTEM, "pipe write error"); |
526 |
> |
kida[i].r1 = lastray+1; |
527 |
> |
lastray += kida[i].nr = ninq; |
528 |
> |
if (lastray < lastdone) /* RNUMBER wrapped? */ |
529 |
> |
lastdone = lastray = 0; |
530 |
> |
ninq = 0; |
531 |
> |
} |
532 |
> |
if (!morays()) |
533 |
> |
break; /* preemptive EOI */ |
534 |
> |
} |
535 |
> |
if (ninq) { /* polish off input */ |
536 |
> |
i = next_child_ready(); |
537 |
> |
n = sizeof(FVECT)*2 * ninq; |
538 |
> |
if (writebuf(kidpr[i].w, (char *)orgdir, n) != n) |
539 |
> |
error(SYSTEM, "pipe write error"); |
540 |
> |
kida[i].r1 = lastray+1; |
541 |
> |
lastray += kida[i].nr = ninq; |
542 |
> |
ninq = 0; |
543 |
> |
} |
544 |
> |
memset(orgdir, 0, sizeof(FVECT)*2); /* get results */ |
545 |
> |
for (i = nchild; i--; ) { |
546 |
> |
writebuf(kidpr[i].w, (char *)orgdir, sizeof(FVECT)*2); |
547 |
> |
queue_results(i); |
548 |
> |
} |
549 |
> |
if (recover) /* and from before? */ |
550 |
> |
queue_modifiers(); |
551 |
> |
end_children(0); /* free up file descriptors */ |
552 |
> |
for (i = 0; i < nmods; i++) |
553 |
> |
mod_output(out_bq->mca[i]); /* output accumulated record */ |
554 |
> |
end_record(); |
555 |
> |
free_binq(out_bq); /* clean up */ |
556 |
> |
out_bq = NULL; |
557 |
> |
free_binq(NULL); |
558 |
|
lu_done(&ofiletab); |
559 |
< |
#undef MAXIQ |
559 |
> |
if (raysleft) |
560 |
> |
error(USER, "unexpected EOF on input"); |
561 |
|
} |