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* Controlling process for multiple children |
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*/ |
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|
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+ |
#include <signal.h> |
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#include "rcontrib.h" |
| 10 |
– |
#include "platform.h" |
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– |
#include "rtprocess.h" |
| 11 |
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#include "selcall.h" |
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|
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#define MAXIQ (int)(PIPE_BUF/(sizeof(FVECT)*2)) |
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} |
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|
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|
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< |
/* Start child processes if we can */ |
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> |
/* Start child processes if we can (call only once in parent!) */ |
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int |
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in_rchild() |
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{ |
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if (rval < 0) |
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error(SYSTEM, "open_process() call failed"); |
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if (rval == 0) { /* if in child, set up & return true */ |
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< |
lu_doall(&modconttab, set_stdout, NULL); |
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> |
lu_doall(&modconttab, &set_stdout, NULL); |
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lu_done(&ofiletab); |
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while (nchild--) { /* don't share other pipes */ |
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close(kida[nchild].pr.w); |
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kida[nchild].infp = fdopen(kida[nchild].pr.r, "rb"); |
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if (kida[nchild].infp == NULL) |
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error(SYSTEM, "out of memory in in_rchild()"); |
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– |
#ifdef getc_unlocked |
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– |
flockfile(kida[nchild].infp); /* avoid mutex overhead */ |
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– |
#endif |
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kida[nchild++].nr = 0; /* mark as available */ |
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} |
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+ |
#ifdef getc_unlocked |
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+ |
for (rval = nchild; rval--; ) /* avoid mutex overhead */ |
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+ |
flockfile(kida[rval].infp); |
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+ |
#endif |
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return(0); /* return "false" in parent */ |
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} |
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|
| 315 |
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|
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/* Close child processes */ |
| 317 |
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void |
| 318 |
< |
end_children() |
| 318 |
> |
end_children(int immed) |
| 319 |
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{ |
| 320 |
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int status; |
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|
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while (nchild > 0) { |
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nchild--; |
| 324 |
< |
if ((status = close_process(&kida[nchild].pr)) > 0) { |
| 324 |
> |
#ifdef SIGKILL |
| 325 |
> |
if (immed) /* error mode -- quick exit */ |
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> |
kill(kida[nchild].pr.pid, SIGKILL); |
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> |
#endif |
| 328 |
> |
if ((status = close_process(&kida[nchild].pr)) > 0 && !immed) { |
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sprintf(errmsg, |
| 330 |
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"rendering process returned bad status (%d)", |
| 331 |
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status); |
| 401 |
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void |
| 402 |
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parental_loop() |
| 403 |
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{ |
| 404 |
< |
static int ignore_warning_given = 0; |
| 401 |
< |
int qlimit = (accumulate == 1) ? 1 : MAXIQ-1; |
| 404 |
> |
const int qlimit = (accumulate == 1) ? 1 : MAXIQ-1; |
| 405 |
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int ninq = 0; |
| 406 |
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FVECT orgdir[2*MAXIQ]; |
| 407 |
|
int i, n; |
| 410 |
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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, |
| 416 |
< |
"dummy ray(s) ignored during accumulation\n"); |
| 417 |
< |
continue; |
| 418 |
< |
} |
| 419 |
< |
while (next_child_nq(1) >= 0) |
| 420 |
< |
; /* clear the queue */ |
| 421 |
< |
lastdone = lastray = 0; |
| 422 |
< |
if ((yres <= 0) | (xres <= 0)) |
| 423 |
< |
waitflush = 1; /* flush next */ |
| 424 |
< |
put_zero_record(++lastray); |
| 425 |
< |
} else if (++ninq >= qlimit || |
| 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) |
| 426 |
|
error(SYSTEM, "pipe write error"); |
| 427 |
|
kida[i].r1 = lastray+1; |
| 428 |
|
lastray += kida[i].nr = ninq; /* mark as busy */ |
| 436 |
– |
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 (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 (raysleft && !--raysleft) |
| 448 |
|
break; /* preemptive EOI */ |
| 449 |
|
} |
| 466 |
|
next_child_ready() |
| 467 |
|
{ |
| 468 |
|
fd_set writeset, errset; |
| 469 |
< |
int i, n, nqr; |
| 469 |
> |
int i, n; |
| 470 |
|
|
| 471 |
|
for (i = nchild; i--; ) /* see if there's one free first */ |
| 472 |
|
if (!kida[i].nr) |
| 525 |
|
error(SYSTEM, "pipe write error"); |
| 526 |
|
kida[i].r1 = lastray+1; |
| 527 |
|
lastray += kida[i].nr = ninq; |
| 524 |
– |
ninq = 0; |
| 528 |
|
if (lastray < lastdone) /* RNUMBER wrapped? */ |
| 529 |
|
lastdone = lastray = 0; |
| 530 |
+ |
ninq = 0; |
| 531 |
|
} |
| 532 |
|
if (raysleft && !--raysleft) |
| 533 |
|
break; /* preemptive EOI */ |
| 541 |
|
lastray += kida[i].nr = ninq; |
| 542 |
|
ninq = 0; |
| 543 |
|
} |
| 544 |
< |
for (i = nchild; i--; ) { /* get results */ |
| 545 |
< |
close(kida[i].pr.w); |
| 544 |
> |
memset(orgdir, 0, sizeof(FVECT)*2); /* get results */ |
| 545 |
> |
for (i = nchild; i--; ) { |
| 546 |
> |
writebuf(kida[i].pr.w, (char *)orgdir, sizeof(FVECT)*2); |
| 547 |
|
queue_results(i); |
| 548 |
|
} |
| 549 |
|
if (recover) /* and from before? */ |
| 550 |
|
queue_modifiers(); |
| 551 |
< |
end_children(); /* free up file descriptors */ |
| 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(); |
