1 |
< |
/* Copyright (c) 1993 Regents of the University of California */ |
1 |
> |
/* Copyright (c) 1996 Regents of the University of California */ |
2 |
|
|
3 |
|
#ifndef lint |
4 |
|
static char SCCSid[] = "$SunId$ LBL"; |
18 |
|
|
19 |
|
#include "random.h" |
20 |
|
|
21 |
< |
#define OCTSCALE 0.5 /* ceil((valid rad.)/(cube size)) */ |
21 |
> |
#ifndef OCTSCALE |
22 |
> |
#define OCTSCALE 1.0 /* ceil((valid rad.)/(cube size)) */ |
23 |
> |
#endif |
24 |
|
|
25 |
|
typedef struct ambtree { |
26 |
|
AMBVAL *alist; /* ambient value list */ |
29 |
|
|
30 |
|
extern CUBE thescene; /* contains space boundaries */ |
31 |
|
|
32 |
+ |
extern char *shm_boundary; /* memory sharing boundary */ |
33 |
+ |
|
34 |
|
#define MAXASET 511 /* maximum number of elements in ambient set */ |
35 |
|
OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
36 |
|
|
42 |
|
static FILE *ambfp = NULL; /* ambient file pointer */ |
43 |
|
static int nunflshed = 0; /* number of unflushed ambient values */ |
44 |
|
|
45 |
+ |
#ifndef SORT_THRESH |
46 |
+ |
#ifdef BIGMEM |
47 |
+ |
#define SORT_THRESH ((9L<<20)/sizeof(AMBVAL)) |
48 |
+ |
#else |
49 |
+ |
#define SORT_THRESH ((3L<<20)/sizeof(AMBVAL)) |
50 |
+ |
#endif |
51 |
+ |
#endif |
52 |
+ |
#ifndef SORT_INTVL |
53 |
+ |
#define SORT_INTVL (SORT_THRESH<<1) |
54 |
+ |
#endif |
55 |
+ |
#ifndef MAX_SORT_INTVL |
56 |
+ |
#define MAX_SORT_INTVL (SORT_INTVL<<6) |
57 |
+ |
#endif |
58 |
+ |
|
59 |
+ |
static double avsum = 0.; /* computed ambient value sum (log) */ |
60 |
+ |
static unsigned int navsum = 0; /* number of values in avsum */ |
61 |
+ |
static unsigned int nambvals = 0; /* total number of indirect values */ |
62 |
+ |
static unsigned int nambshare = 0; /* number of values from file */ |
63 |
+ |
static unsigned long ambclock = 0; /* ambient access clock */ |
64 |
+ |
static unsigned long lastsort = 0; /* time of last value sort */ |
65 |
+ |
static long sortintvl = SORT_INTVL; /* time until next sort */ |
66 |
+ |
|
67 |
+ |
#define MAXACLOCK (1L<<30) /* clock turnover value */ |
68 |
+ |
/* |
69 |
+ |
* Track access times unless we are sharing ambient values |
70 |
+ |
* through memory on a multiprocessor, when we want to avoid |
71 |
+ |
* claiming our own memory (copy on write). Go ahead anyway |
72 |
+ |
* if more than two thirds of our values are unshared. |
73 |
+ |
* Compile with -Dtracktime=0 to turn this code off. |
74 |
+ |
*/ |
75 |
+ |
#ifndef tracktime |
76 |
+ |
#define tracktime (shm_boundary == NULL || nambvals > 3*nambshare) |
77 |
+ |
#endif |
78 |
+ |
|
79 |
|
#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
80 |
|
|
81 |
|
#define newambval() (AMBVAL *)bmalloc(sizeof(AMBVAL)) |
82 |
|
|
83 |
< |
#define newambtree() (AMBTREE *)calloc(8, sizeof(AMBTREE)) |
46 |
< |
#define freeambtree(t) free((char *)(t)) |
47 |
< |
|
48 |
< |
extern long ftell(), lseek(); |
49 |
< |
static int initambfile(), avsave(), avinsert(), loadatree(); |
83 |
> |
static int initambfile(), avsave(), avinsert(), sortambvals(), avlmemi(); |
84 |
|
static AMBVAL *avstore(); |
85 |
|
#ifdef F_SETLKW |
86 |
|
static aflock(); |
97 |
|
maxarad = thescene.cusize / 2.0; |
98 |
|
} else { |
99 |
|
minarad = thescene.cusize / ar; |
100 |
< |
maxarad = 16 * minarad; /* heuristic */ |
100 |
> |
maxarad = 64 * minarad; /* heuristic */ |
101 |
|
if (maxarad > thescene.cusize / 2.0) |
102 |
|
maxarad = thescene.cusize / 2.0; |
103 |
|
} |
111 |
|
setambacc(newa) /* set ambient accuracy */ |
112 |
|
double newa; |
113 |
|
{ |
114 |
< |
static double oldambacc = -1.0; |
81 |
< |
AMBTREE oldatrunk; |
114 |
> |
double ambdiff; |
115 |
|
|
116 |
< |
ambacc = newa < 0.0 ? 0.0 : newa; /* may be done already */ |
117 |
< |
if (oldambacc < -FTINY) |
118 |
< |
oldambacc = ambacc; /* do nothing first call */ |
119 |
< |
if (fabs(newa - oldambacc) < 0.01) |
120 |
< |
return; /* insignificant -- don't bother */ |
88 |
< |
if (ambacc <= FTINY) |
89 |
< |
return; /* cannot build new tree */ |
90 |
< |
/* else need to rebuild tree */ |
91 |
< |
copystruct(&oldatrunk, &atrunk); |
92 |
< |
atrunk.alist = NULL; |
93 |
< |
atrunk.kid = NULL; |
94 |
< |
loadatree(&oldatrunk); |
95 |
< |
oldambacc = ambacc; /* remeber setting for next call */ |
116 |
> |
if (newa < 0.0) |
117 |
> |
newa = 0.0; |
118 |
> |
ambdiff = fabs(newa - ambacc); |
119 |
> |
if (ambdiff >= .01 && (ambacc = newa) > FTINY && nambvals > 0) |
120 |
> |
sortambvals(1); /* rebuild tree */ |
121 |
|
} |
122 |
|
|
123 |
|
|
124 |
|
setambient(afile) /* initialize calculation */ |
125 |
|
char *afile; |
126 |
|
{ |
127 |
< |
long headlen; |
127 |
> |
long pos, flen; |
128 |
|
AMBVAL amb; |
129 |
|
/* init ambient limits */ |
130 |
|
setambres(ambres); |
140 |
|
/* open ambient file */ |
141 |
|
if ((ambfp = fopen(afile, "r+")) != NULL) { |
142 |
|
initambfile(0); |
143 |
< |
headlen = ftell(ambfp); |
143 |
> |
pos = ftell(ambfp); |
144 |
|
while (readambval(&amb, ambfp)) |
145 |
|
avinsert(avstore(&amb)); |
146 |
|
/* align */ |
147 |
< |
fseek(ambfp, -((ftell(ambfp)-headlen)%AMBVALSIZ), 1); |
147 |
> |
pos += (long)nambvals*AMBVALSIZ; |
148 |
> |
flen = lseek(fileno(ambfp), 0L, 2); |
149 |
> |
if (flen != pos) { |
150 |
> |
sprintf(errmsg, |
151 |
> |
"ignoring last %ld values in ambient file (corrupted)", |
152 |
> |
(flen - pos)/AMBVALSIZ); |
153 |
> |
error(WARNING, errmsg); |
154 |
> |
fseek(ambfp, pos, 0); |
155 |
> |
ftruncate(fileno(ambfp), pos); |
156 |
> |
} |
157 |
> |
nambshare = nambvals; |
158 |
|
} else if ((ambfp = fopen(afile, "w+")) != NULL) |
159 |
|
initambfile(1); |
160 |
|
else { |
188 |
|
} |
189 |
|
|
190 |
|
|
191 |
< |
ambient(acol, r) /* compute ambient component for ray */ |
191 |
> |
ambient(acol, r, nrm) /* compute ambient component for ray */ |
192 |
|
COLOR acol; |
193 |
|
register RAY *r; |
194 |
+ |
FVECT nrm; |
195 |
|
{ |
196 |
|
static int rdepth = 0; /* ambient recursion */ |
197 |
< |
double d; |
197 |
> |
double d, l; |
198 |
|
|
199 |
|
if (ambdiv <= 0) /* no ambient calculation */ |
200 |
|
goto dumbamb; |
210 |
|
rdepth++; |
211 |
|
d = doambient(acol, r, r->rweight, NULL, NULL); |
212 |
|
rdepth--; |
213 |
< |
if (d == 0.0) |
213 |
> |
if (d <= FTINY) |
214 |
|
goto dumbamb; |
215 |
|
return; |
216 |
|
} |
217 |
+ |
|
218 |
+ |
if (tracktime) /* sort to minimize thrashing */ |
219 |
+ |
sortambvals(0); |
220 |
|
/* get ambient value */ |
221 |
|
setcolor(acol, 0.0, 0.0, 0.0); |
222 |
< |
d = sumambient(acol, r, rdepth, |
222 |
> |
d = sumambient(acol, r, nrm, rdepth, |
223 |
|
&atrunk, thescene.cuorg, thescene.cusize); |
224 |
< |
if (d > FTINY) |
224 |
> |
if (d > FTINY) { |
225 |
|
scalecolor(acol, 1.0/d); |
226 |
< |
else { |
188 |
< |
d = makeambient(acol, r, rdepth++); |
189 |
< |
rdepth--; |
226 |
> |
return; |
227 |
|
} |
228 |
+ |
rdepth++; /* need to cache new value */ |
229 |
+ |
d = makeambient(acol, r, nrm, rdepth-1); |
230 |
+ |
rdepth--; |
231 |
|
if (d > FTINY) |
232 |
|
return; |
233 |
|
dumbamb: /* return global value */ |
234 |
|
copycolor(acol, ambval); |
235 |
+ |
if (ambvwt <= 0 | navsum == 0) |
236 |
+ |
return; |
237 |
+ |
l = bright(ambval); /* average in computations */ |
238 |
+ |
if (l > FTINY) { |
239 |
+ |
d = (log(l)*(double)ambvwt + avsum) / |
240 |
+ |
(double)(ambvwt + navsum); |
241 |
+ |
d = exp(d) / l; |
242 |
+ |
scalecolor(acol, d); /* apply color of ambval */ |
243 |
+ |
} else { |
244 |
+ |
d = exp( avsum / (double)navsum ); |
245 |
+ |
setcolor(acol, d, d, d); /* neutral color */ |
246 |
+ |
} |
247 |
|
} |
248 |
|
|
249 |
|
|
250 |
|
double |
251 |
< |
sumambient(acol, r, al, at, c0, s) /* get interpolated ambient value */ |
251 |
> |
sumambient(acol, r, rn, al, at, c0, s) /* get interpolated ambient value */ |
252 |
|
COLOR acol; |
253 |
|
register RAY *r; |
254 |
+ |
FVECT rn; |
255 |
|
int al; |
256 |
|
AMBTREE *at; |
257 |
|
FVECT c0; |
263 |
|
int i; |
264 |
|
register int j; |
265 |
|
register AMBVAL *av; |
266 |
< |
/* do this node */ |
266 |
> |
|
267 |
|
wsum = 0.0; |
268 |
+ |
/* do this node */ |
269 |
|
for (av = at->alist; av != NULL; av = av->next) { |
270 |
+ |
if (tracktime) |
271 |
+ |
av->latick = ambclock; |
272 |
|
/* |
273 |
|
* Ambient level test. |
274 |
|
*/ |
279 |
|
/* |
280 |
|
* Ambient radius test. |
281 |
|
*/ |
282 |
< |
e1 = 0.0; |
283 |
< |
for (j = 0; j < 3; j++) { |
284 |
< |
d = av->pos[j] - r->rop[j]; |
285 |
< |
e1 += d * d; |
286 |
< |
} |
282 |
> |
d = av->pos[0] - r->rop[0]; |
283 |
> |
e1 = d * d; |
284 |
> |
d = av->pos[1] - r->rop[1]; |
285 |
> |
e1 += d * d; |
286 |
> |
d = av->pos[2] - r->rop[2]; |
287 |
> |
e1 += d * d; |
288 |
|
e1 /= av->rad * av->rad; |
289 |
|
if (e1 > ambacc*ambacc*1.21) |
290 |
|
continue; |
308 |
|
* Jittering final test reduces image artifacts. |
309 |
|
*/ |
310 |
|
wt = sqrt(e1) + sqrt(e2); |
311 |
< |
wt *= .9 + .2*urand(9015+samplendx); |
255 |
< |
if (wt > ambacc) |
311 |
> |
if (wt > ambacc*(.9+.2*urand(9015+samplendx))) |
312 |
|
continue; |
313 |
|
if (wt <= 1e-3) |
314 |
|
wt = 1e3; |
315 |
|
else |
316 |
|
wt = 1.0 / wt; |
317 |
|
wsum += wt; |
318 |
< |
extambient(ct, av, r->rop, r->ron); |
318 |
> |
extambient(ct, av, r->rop, rn); |
319 |
|
scalecolor(ct, wt); |
320 |
|
addcolor(acol, ct); |
321 |
|
} |
334 |
|
break; |
335 |
|
} |
336 |
|
if (j == 3) |
337 |
< |
wsum += sumambient(acol, r, al, at->kid+i, ck0, s); |
337 |
> |
wsum += sumambient(acol, r, rn, al, at->kid+i, ck0, s); |
338 |
|
} |
339 |
|
return(wsum); |
340 |
|
} |
341 |
|
|
342 |
|
|
343 |
|
double |
344 |
< |
makeambient(acol, r, al) /* make a new ambient value */ |
344 |
> |
makeambient(acol, r, rn, al) /* make a new ambient value */ |
345 |
|
COLOR acol; |
346 |
|
register RAY *r; |
347 |
+ |
FVECT rn; |
348 |
|
int al; |
349 |
|
{ |
350 |
|
AMBVAL amb; |
351 |
|
FVECT gp, gd; |
352 |
|
/* compute weight */ |
353 |
|
amb.weight = pow(AVGREFL, (double)al); |
354 |
< |
if (r->rweight < 0.2*amb.weight) /* heuristic */ |
354 |
> |
if (r->rweight < 0.1*amb.weight) /* heuristic */ |
355 |
|
amb.weight = r->rweight; |
356 |
|
/* compute ambient */ |
357 |
|
amb.rad = doambient(acol, r, amb.weight, gp, gd); |
358 |
< |
if (amb.rad == 0.0) |
358 |
> |
if (amb.rad <= FTINY) |
359 |
|
return(0.0); |
360 |
|
/* store it */ |
361 |
|
VCOPY(amb.pos, r->rop); |
366 |
|
VCOPY(amb.gdir, gd); |
367 |
|
/* insert into tree */ |
368 |
|
avsave(&amb); /* and save to file */ |
369 |
+ |
if (rn != r->ron) |
370 |
+ |
extambient(acol, &amb, r->rop, rn); /* texture */ |
371 |
|
return(amb.rad); |
372 |
|
} |
373 |
|
|
377 |
|
register AMBVAL *ap; |
378 |
|
FVECT pv, nv; |
379 |
|
{ |
380 |
< |
FVECT v1, v2; |
380 |
> |
FVECT v1; |
381 |
|
register int i; |
382 |
|
double d; |
383 |
|
|
386 |
|
for (i = 0; i < 3; i++) |
387 |
|
d += ap->gpos[i]*(pv[i]-ap->pos[i]); |
388 |
|
/* gradient due to rotation */ |
389 |
< |
VCOPY(v1, ap->dir); |
390 |
< |
fcross(v2, v1, nv); |
332 |
< |
d += DOT(ap->gdir, v2); |
389 |
> |
VCROSS(v1, ap->dir, nv); |
390 |
> |
d += DOT(ap->gdir, v1); |
391 |
|
if (d <= 0.0) { |
392 |
|
setcolor(cr, 0.0, 0.0, 0.0); |
393 |
|
return; |
412 |
|
setbuf(ambfp, bmalloc(BUFSIZ+8)); |
413 |
|
if (creat) { /* new file */ |
414 |
|
newheader("RADIANCE", ambfp); |
415 |
< |
fprintf(ambfp, "%s -av %g %g %g -ab %d -aa %g ", |
415 |
> |
fprintf(ambfp, "%s -av %g %g %g -aw %d -ab %d -aa %g ", |
416 |
|
progname, colval(ambval,RED), |
417 |
|
colval(ambval,GRN), colval(ambval,BLU), |
418 |
< |
ambounce, ambacc); |
418 |
> |
ambvwt, ambounce, ambacc); |
419 |
|
fprintf(ambfp, "-ad %d -as %d -ar %d %s\n", |
420 |
|
ambdiv, ambssamp, ambres, |
421 |
|
octname==NULL ? "" : octname); |
451 |
|
register AMBVAL *aval; |
452 |
|
{ |
453 |
|
register AMBVAL *av; |
454 |
+ |
double d; |
455 |
|
|
456 |
|
if ((av = newambval()) == NULL) |
457 |
|
error(SYSTEM, "out of memory in avstore"); |
458 |
|
copystruct(av, aval); |
459 |
+ |
av->latick = ambclock; |
460 |
+ |
av->next = NULL; |
461 |
+ |
nambvals++; |
462 |
+ |
d = bright(av->val); |
463 |
+ |
if (d > FTINY) { /* add to log sum for averaging */ |
464 |
+ |
avsum += log(d); |
465 |
+ |
navsum++; |
466 |
+ |
} |
467 |
|
return(av); |
468 |
|
} |
469 |
|
|
470 |
|
|
471 |
+ |
#define ATALLOCSZ 512 /* #/8 trees to allocate at once */ |
472 |
+ |
|
473 |
+ |
static AMBTREE *atfreelist = NULL; /* free ambient tree structures */ |
474 |
+ |
|
475 |
+ |
|
476 |
|
static |
477 |
+ |
AMBTREE * |
478 |
+ |
newambtree() /* allocate 8 ambient tree structs */ |
479 |
+ |
{ |
480 |
+ |
register AMBTREE *atp, *upperlim; |
481 |
+ |
|
482 |
+ |
if (atfreelist == NULL) { /* get more nodes */ |
483 |
+ |
atfreelist = (AMBTREE *)bmalloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
484 |
+ |
if (atfreelist == NULL) |
485 |
+ |
return(NULL); |
486 |
+ |
/* link new free list */ |
487 |
+ |
upperlim = atfreelist + 8*(ATALLOCSZ-1); |
488 |
+ |
for (atp = atfreelist; atp < upperlim; atp += 8) |
489 |
+ |
atp->kid = atp + 8; |
490 |
+ |
atp->kid = NULL; |
491 |
+ |
} |
492 |
+ |
atp = atfreelist; |
493 |
+ |
atfreelist = atp->kid; |
494 |
+ |
bzero((char *)atp, 8*sizeof(AMBTREE)); |
495 |
+ |
return(atp); |
496 |
+ |
} |
497 |
+ |
|
498 |
+ |
|
499 |
+ |
static |
500 |
+ |
freeambtree(atp) /* free 8 ambient tree structs */ |
501 |
+ |
AMBTREE *atp; |
502 |
+ |
{ |
503 |
+ |
atp->kid = atfreelist; |
504 |
+ |
atfreelist = atp; |
505 |
+ |
} |
506 |
+ |
|
507 |
+ |
|
508 |
+ |
static |
509 |
|
avinsert(av) /* insert ambient value in our tree */ |
510 |
|
register AMBVAL *av; |
511 |
|
{ |
546 |
|
|
547 |
|
|
548 |
|
static |
549 |
< |
loadatree(at) /* move tree to main store */ |
549 |
> |
unloadatree(at, f) /* unload an ambient value tree */ |
550 |
|
register AMBTREE *at; |
551 |
+ |
int (*f)(); |
552 |
|
{ |
553 |
|
register AMBVAL *av; |
554 |
|
register int i; |
555 |
|
/* transfer values at this node */ |
556 |
|
for (av = at->alist; av != NULL; av = at->alist) { |
557 |
|
at->alist = av->next; |
558 |
< |
avinsert(av); |
558 |
> |
(*f)(av); |
559 |
|
} |
560 |
|
if (at->kid == NULL) |
561 |
|
return; |
562 |
|
for (i = 0; i < 8; i++) /* transfer and free children */ |
563 |
< |
loadatree(at->kid+i); |
563 |
> |
unloadatree(at->kid+i, f); |
564 |
|
freeambtree(at->kid); |
565 |
+ |
at->kid = NULL; |
566 |
|
} |
567 |
|
|
568 |
|
|
569 |
+ |
static struct avl { |
570 |
+ |
AMBVAL *p; |
571 |
+ |
unsigned long t; |
572 |
+ |
} *avlist1; /* ambient value list with ticks */ |
573 |
+ |
static AMBVAL **avlist2; /* memory positions for sorting */ |
574 |
+ |
static int i_avlist; /* index for lists */ |
575 |
+ |
|
576 |
+ |
|
577 |
+ |
static |
578 |
+ |
av2list(av) |
579 |
+ |
register AMBVAL *av; |
580 |
+ |
{ |
581 |
+ |
#ifdef DEBUG |
582 |
+ |
if (i_avlist >= nambvals) |
583 |
+ |
error(CONSISTENCY, "too many ambient values in av2list1"); |
584 |
+ |
#endif |
585 |
+ |
avlist1[i_avlist].p = avlist2[i_avlist] = av; |
586 |
+ |
avlist1[i_avlist++].t = av->latick; |
587 |
+ |
} |
588 |
+ |
|
589 |
+ |
|
590 |
+ |
static int |
591 |
+ |
alatcmp(av1, av2) /* compare ambient values for MRA */ |
592 |
+ |
struct avl *av1, *av2; |
593 |
+ |
{ |
594 |
+ |
register long lc = av2->t - av1->t; |
595 |
+ |
return(lc<0 ? -1 : lc>0 ? 1 : 0); |
596 |
+ |
} |
597 |
+ |
|
598 |
+ |
|
599 |
+ |
static int |
600 |
+ |
aposcmp(avp1, avp2) /* compare ambient value positions */ |
601 |
+ |
AMBVAL **avp1, **avp2; |
602 |
+ |
{ |
603 |
+ |
return(*avp1 - *avp2); |
604 |
+ |
} |
605 |
+ |
|
606 |
+ |
|
607 |
+ |
#if 1 |
608 |
+ |
static int |
609 |
+ |
avlmemi(avaddr) /* find list position from address */ |
610 |
+ |
AMBVAL *avaddr; |
611 |
+ |
{ |
612 |
+ |
register AMBVAL **avlpp; |
613 |
+ |
|
614 |
+ |
avlpp = (AMBVAL **)bsearch((char *)&avaddr, (char *)avlist2, |
615 |
+ |
nambvals, sizeof(AMBVAL *), aposcmp); |
616 |
+ |
if (avlpp == NULL) |
617 |
+ |
error(CONSISTENCY, "address not found in avlmemi"); |
618 |
+ |
return(avlpp - avlist2); |
619 |
+ |
} |
620 |
+ |
#else |
621 |
+ |
#define avlmemi(avaddr) ((AMBVAL **)bsearch((char *)&avaddr,(char *)avlist2, \ |
622 |
+ |
nambvals,sizeof(AMBVAL *),aposcmp) - avlist2) |
623 |
+ |
#endif |
624 |
+ |
|
625 |
+ |
|
626 |
+ |
static |
627 |
+ |
sortambvals(always) /* resort ambient values */ |
628 |
+ |
int always; |
629 |
+ |
{ |
630 |
+ |
AMBTREE oldatrunk; |
631 |
+ |
AMBVAL tav, *tap, *pnext; |
632 |
+ |
register int i, j; |
633 |
+ |
/* see if it's time yet */ |
634 |
+ |
if (!always && (ambclock++ < lastsort+sortintvl || |
635 |
+ |
nambvals < SORT_THRESH)) |
636 |
+ |
return; |
637 |
+ |
/* |
638 |
+ |
* The idea here is to minimize memory thrashing |
639 |
+ |
* in VM systems by improving reference locality. |
640 |
+ |
* We do this by periodically sorting our stored ambient |
641 |
+ |
* values in memory in order of most recently to least |
642 |
+ |
* recently accessed. This ordering was chosen so that new |
643 |
+ |
* ambient values (which tend to be less important) go into |
644 |
+ |
* higher memory with the infrequently accessed values. |
645 |
+ |
* Since we expect our values to need sorting less |
646 |
+ |
* frequently as the process continues, we double our |
647 |
+ |
* waiting interval after each call. |
648 |
+ |
* This routine is also called by setambacc() with |
649 |
+ |
* the "always" parameter set to 1 so that the ambient |
650 |
+ |
* tree will be rebuilt with the new accuracy parameter. |
651 |
+ |
*/ |
652 |
+ |
if (tracktime) { /* allocate pointer arrays to sort */ |
653 |
+ |
avlist2 = (AMBVAL **)malloc(nambvals*sizeof(AMBVAL *)); |
654 |
+ |
avlist1 = (struct avl *)malloc(nambvals*sizeof(struct avl)); |
655 |
+ |
} else { |
656 |
+ |
avlist2 = NULL; |
657 |
+ |
avlist1 = NULL; |
658 |
+ |
} |
659 |
+ |
if (avlist1 == NULL) { /* no time tracking -- rebuild tree? */ |
660 |
+ |
if (avlist2 != NULL) |
661 |
+ |
free((char *)avlist2); |
662 |
+ |
if (always) { /* rebuild without sorting */ |
663 |
+ |
copystruct(&oldatrunk, &atrunk); |
664 |
+ |
atrunk.alist = NULL; |
665 |
+ |
atrunk.kid = NULL; |
666 |
+ |
unloadatree(&oldatrunk, avinsert); |
667 |
+ |
} |
668 |
+ |
} else { /* sort memory by last access time */ |
669 |
+ |
/* |
670 |
+ |
* Sorting memory is tricky because it isn't contiguous. |
671 |
+ |
* We have to sort an array of pointers by MRA and also |
672 |
+ |
* by memory position. We then copy values in "loops" |
673 |
+ |
* to minimize memory hits. Nevertheless, we will visit |
674 |
+ |
* everyone at least twice, and this is an expensive process |
675 |
+ |
* when we're thrashing, which is when we need to do it. |
676 |
+ |
*/ |
677 |
+ |
#ifdef DEBUG |
678 |
+ |
sprintf(errmsg, "sorting %u ambient values at ambclock=%lu...", |
679 |
+ |
nambvals, ambclock); |
680 |
+ |
eputs(errmsg); |
681 |
+ |
#endif |
682 |
+ |
i_avlist = 0; |
683 |
+ |
unloadatree(&atrunk, av2list); /* empty current tree */ |
684 |
+ |
#ifdef DEBUG |
685 |
+ |
if (i_avlist < nambvals) |
686 |
+ |
error(CONSISTENCY, "missing ambient values in sortambvals"); |
687 |
+ |
#endif |
688 |
+ |
qsort((char *)avlist1, nambvals, sizeof(struct avl), alatcmp); |
689 |
+ |
qsort((char *)avlist2, nambvals, sizeof(AMBVAL *), aposcmp); |
690 |
+ |
for (i = 0; i < nambvals; i++) { |
691 |
+ |
if (avlist1[i].p == NULL) |
692 |
+ |
continue; |
693 |
+ |
tap = avlist2[i]; |
694 |
+ |
copystruct(&tav, tap); |
695 |
+ |
for (j = i; (pnext = avlist1[j].p) != tap; |
696 |
+ |
j = avlmemi(pnext)) { |
697 |
+ |
copystruct(avlist2[j], pnext); |
698 |
+ |
avinsert(avlist2[j]); |
699 |
+ |
avlist1[j].p = NULL; |
700 |
+ |
} |
701 |
+ |
copystruct(avlist2[j], &tav); |
702 |
+ |
avinsert(avlist2[j]); |
703 |
+ |
avlist1[j].p = NULL; |
704 |
+ |
} |
705 |
+ |
free((char *)avlist1); |
706 |
+ |
free((char *)avlist2); |
707 |
+ |
/* compute new sort interval */ |
708 |
+ |
sortintvl = ambclock - lastsort; |
709 |
+ |
if (sortintvl >= MAX_SORT_INTVL/2) |
710 |
+ |
sortintvl = MAX_SORT_INTVL; |
711 |
+ |
else |
712 |
+ |
sortintvl <<= 1; /* wait twice as long next */ |
713 |
+ |
#ifdef DEBUG |
714 |
+ |
eputs("done\n"); |
715 |
+ |
#endif |
716 |
+ |
} |
717 |
+ |
if (ambclock >= MAXACLOCK) |
718 |
+ |
ambclock = MAXACLOCK/2; |
719 |
+ |
lastsort = ambclock; |
720 |
+ |
} |
721 |
+ |
|
722 |
+ |
|
723 |
|
#ifdef F_SETLKW |
724 |
|
|
725 |
|
static |
761 |
|
if (fseek(ambinp, lastpos, 0) < 0) |
762 |
|
goto seekerr; |
763 |
|
while (n >= AMBVALSIZ) { /* load contributed values */ |
764 |
< |
readambval(&avs, ambinp); |
764 |
> |
if (!readambval(&avs, ambinp)) { |
765 |
> |
sprintf(errmsg, |
766 |
> |
"ambient file corrupted near character %ld", |
767 |
> |
flen - n); |
768 |
> |
error(WARNING, errmsg); |
769 |
> |
break; |
770 |
> |
} |
771 |
|
avinsert(avstore(&avs)); |
772 |
|
n -= AMBVALSIZ; |
773 |
|
} |