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/* Copyright (c) 1993 Regents of the University of California */ |
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> |
/* Copyright (c) 1995 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
18 |
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19 |
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#include "random.h" |
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|
21 |
< |
#define OCTSCALE 0.5 /* ceil((valid rad.)/(cube size)) */ |
21 |
> |
#define OCTSCALE 1.0 /* ceil((valid rad.)/(cube size)) */ |
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|
23 |
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typedef struct ambtree { |
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AMBVAL *alist; /* ambient value list */ |
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|
28 |
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extern CUBE thescene; /* contains space boundaries */ |
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|
30 |
+ |
extern char *shm_boundary; /* memory sharing boundary */ |
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|
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#define MAXASET 511 /* maximum number of elements in ambient set */ |
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OBJECT ambset[MAXASET+1]={0}; /* ambient include/exclude set */ |
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|
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static FILE *ambfp = NULL; /* ambient file pointer */ |
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static int nunflshed = 0; /* number of unflushed ambient values */ |
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|
43 |
+ |
#ifndef SORT_THRESH |
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#ifdef BIGMEM |
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#define SORT_THRESH ((9L<<20)/sizeof(AMBVAL)) |
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#else |
47 |
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#define SORT_THRESH ((3L<<20)/sizeof(AMBVAL)) |
48 |
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#endif |
49 |
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#endif |
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#ifndef SORT_INTVL |
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#define SORT_INTVL (SORT_THRESH*256) |
52 |
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#endif |
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#ifndef MAX_SORT_INTVL |
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#define MAX_SORT_INTVL (SORT_INTVL<<4) |
55 |
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#endif |
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|
57 |
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static unsigned long ambclock = 0; /* ambient access clock */ |
58 |
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static unsigned int nambvals = 0; /* number of stored ambient values */ |
59 |
+ |
static unsigned long lastsort = 0; /* time of last value sort */ |
60 |
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static long sortintvl = SORT_INTVL; /* time until next sort */ |
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|
62 |
+ |
#define MAXACLOCK (1L<<30) /* clock turnover value */ |
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/* |
64 |
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* Track access times unless we are sharing ambient values |
65 |
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* through memory on a multiprocessor, when we want to avoid |
66 |
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* claiming our own memory (copy on write). |
67 |
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*/ |
68 |
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#define tracktime (shm_boundary == NULL || ambfp == NULL) |
69 |
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|
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#define AMBFLUSH (BUFSIZ/AMBVALSIZ) |
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|
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#define newambval() (AMBVAL *)bmalloc(sizeof(AMBVAL)) |
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|
45 |
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#define newambtree() (AMBTREE *)calloc(8, sizeof(AMBTREE)) |
46 |
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#define freeambtree(t) free((char *)(t)) |
47 |
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|
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extern long ftell(), lseek(); |
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static int initambfile(), avsave(), avinsert(), loadatree(); |
75 |
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static int initambfile(), avsave(), avinsert(), sortambvals(); |
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static AMBVAL *avstore(); |
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#ifdef F_SETLKW |
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static aflock(); |
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ambres = ar < 0 ? 0 : ar; /* may be done already */ |
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/* set min & max radii */ |
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if (ar <= 0) { |
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minarad = 0.0; |
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minarad = 0; |
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maxarad = thescene.cusize / 2.0; |
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} else { |
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minarad = thescene.cusize / ar; |
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maxarad = 16.0 * minarad; /* heuristic */ |
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maxarad = 64 * minarad; /* heuristic */ |
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if (maxarad > thescene.cusize / 2.0) |
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maxarad = thescene.cusize / 2.0; |
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} |
96 |
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if (maxarad <= FTINY) |
97 |
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maxarad = .001; |
96 |
> |
if (minarad <= FTINY) |
97 |
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minarad = 10*FTINY; |
98 |
> |
if (maxarad <= minarad) |
99 |
> |
maxarad = 64 * minarad; |
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} |
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|
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|
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double newa; |
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{ |
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static double oldambacc = -1.0; |
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AMBTREE oldatrunk; |
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|
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ambacc = newa < 0.0 ? 0.0 : newa; /* may be done already */ |
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if (oldambacc < -FTINY) |
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if (ambacc <= FTINY) |
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return; /* cannot build new tree */ |
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/* else need to rebuild tree */ |
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copystruct(&oldatrunk, &atrunk); |
90 |
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atrunk.alist = NULL; |
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atrunk.kid = NULL; |
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loadatree(&oldatrunk); |
116 |
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sortambvals(1); |
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oldambacc = ambacc; /* remeber setting for next call */ |
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} |
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|
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goto dumbamb; |
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return; |
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} |
203 |
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/* resort memory? */ |
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sortambvals(0); |
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/* get ambient value */ |
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setcolor(acol, 0.0, 0.0, 0.0); |
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d = sumambient(acol, r, rdepth, |
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int i; |
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register int j; |
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register AMBVAL *av; |
237 |
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/* do this node */ |
237 |
> |
|
238 |
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wsum = 0.0; |
239 |
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/* do this node */ |
240 |
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for (av = at->alist; av != NULL; av = av->next) { |
241 |
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if (tracktime) |
242 |
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av->latick = ambclock++; |
243 |
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/* |
244 |
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* Ambient level test. |
245 |
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*/ |
246 |
< |
if (av->lvl > al || av->weight < r->rweight-FTINY) |
246 |
> |
if (av->lvl > al) /* list sorted, so this works */ |
247 |
> |
break; |
248 |
> |
if (av->weight < r->rweight-FTINY) |
249 |
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continue; |
250 |
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/* |
251 |
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* Ambient radius test. |
252 |
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*/ |
253 |
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e1 = 0.0; |
254 |
< |
for (j = 0; j < 3; j++) { |
255 |
< |
d = av->pos[j] - r->rop[j]; |
256 |
< |
e1 += d * d; |
257 |
< |
} |
253 |
> |
d = av->pos[0] - r->rop[0]; |
254 |
> |
e1 = d * d; |
255 |
> |
d = av->pos[1] - r->rop[1]; |
256 |
> |
e1 += d * d; |
257 |
> |
d = av->pos[2] - r->rop[2]; |
258 |
> |
e1 += d * d; |
259 |
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e1 /= av->rad * av->rad; |
260 |
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if (e1 > ambacc*ambacc*1.21) |
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continue; |
381 |
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#endif |
382 |
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setbuf(ambfp, bmalloc(BUFSIZ+8)); |
383 |
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if (creat) { /* new file */ |
384 |
+ |
newheader("RADIANCE", ambfp); |
385 |
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fprintf(ambfp, "%s -av %g %g %g -ab %d -aa %g ", |
386 |
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progname, colval(ambval,RED), |
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colval(ambval,GRN), colval(ambval,BLU), |
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if ((av = newambval()) == NULL) |
426 |
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error(SYSTEM, "out of memory in avstore"); |
427 |
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copystruct(av, aval); |
428 |
+ |
av->latick = ambclock; |
429 |
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av->next = NULL; |
430 |
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nambvals++; |
431 |
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return(av); |
432 |
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} |
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|
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|
435 |
+ |
#define ATALLOCSZ 512 /* #/8 trees to allocate at once */ |
436 |
+ |
|
437 |
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static AMBTREE *atfreelist = NULL; /* free ambient tree structures */ |
438 |
+ |
|
439 |
+ |
|
440 |
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static |
441 |
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AMBTREE * |
442 |
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newambtree() /* allocate 8 ambient tree structs */ |
443 |
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{ |
444 |
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register AMBTREE *atp, *upperlim; |
445 |
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|
446 |
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if (atfreelist == NULL) { /* get more nodes */ |
447 |
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atfreelist = (AMBTREE *)bmalloc(ATALLOCSZ*8*sizeof(AMBTREE)); |
448 |
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if (atfreelist == NULL) |
449 |
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return(NULL); |
450 |
+ |
/* link new free list */ |
451 |
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upperlim = atfreelist + 8*(ATALLOCSZ-1); |
452 |
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for (atp = atfreelist; atp < upperlim; atp += 8) |
453 |
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atp->kid = atp + 8; |
454 |
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atp->kid = NULL; |
455 |
+ |
} |
456 |
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atp = atfreelist; |
457 |
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atfreelist = atp->kid; |
458 |
+ |
bzero((char *)atp, 8*sizeof(AMBTREE)); |
459 |
+ |
return(atp); |
460 |
+ |
} |
461 |
+ |
|
462 |
+ |
|
463 |
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static |
464 |
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freeambtree(atp) /* free 8 ambient tree structs */ |
465 |
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AMBTREE *atp; |
466 |
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{ |
467 |
+ |
atp->kid = atfreelist; |
468 |
+ |
atfreelist = atp; |
469 |
+ |
} |
470 |
+ |
|
471 |
+ |
|
472 |
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static |
473 |
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avinsert(av) /* insert ambient value in our tree */ |
474 |
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register AMBVAL *av; |
475 |
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{ |
476 |
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register AMBTREE *at; |
477 |
+ |
register AMBVAL *ap; |
478 |
+ |
AMBVAL avh; |
479 |
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FVECT ck0; |
480 |
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double s; |
481 |
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int branch; |
499 |
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} |
500 |
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at = at->kid + branch; |
501 |
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} |
502 |
< |
av->next = at->alist; |
503 |
< |
at->alist = av; |
502 |
> |
avh.next = at->alist; /* order by increasing level */ |
503 |
> |
for (ap = &avh; ap->next != NULL; ap = ap->next) |
504 |
> |
if (ap->next->lvl >= av->lvl) |
505 |
> |
break; |
506 |
> |
av->next = ap->next; |
507 |
> |
ap->next = av; |
508 |
> |
at->alist = avh.next; |
509 |
|
} |
510 |
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|
511 |
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|
512 |
|
static |
513 |
< |
loadatree(at) /* move tree to main store */ |
513 |
> |
unloadatree(at, f) /* unload an ambient value tree */ |
514 |
|
register AMBTREE *at; |
515 |
+ |
int (*f)(); |
516 |
|
{ |
517 |
|
register AMBVAL *av; |
518 |
|
register int i; |
519 |
|
/* transfer values at this node */ |
520 |
|
for (av = at->alist; av != NULL; av = at->alist) { |
521 |
|
at->alist = av->next; |
522 |
< |
avinsert(av); |
522 |
> |
(*f)(av); |
523 |
|
} |
524 |
|
if (at->kid == NULL) |
525 |
|
return; |
526 |
|
for (i = 0; i < 8; i++) /* transfer and free children */ |
527 |
< |
loadatree(at->kid+i); |
527 |
> |
unloadatree(at->kid+i, f); |
528 |
|
freeambtree(at->kid); |
529 |
+ |
at->kid = NULL; |
530 |
|
} |
531 |
|
|
532 |
|
|
533 |
+ |
static AMBVAL **avlist1, **avlist2; /* ambient value lists for sorting */ |
534 |
+ |
static int i_avlist; /* index for lists */ |
535 |
+ |
|
536 |
+ |
|
537 |
+ |
static |
538 |
+ |
av2list(av) |
539 |
+ |
AMBVAL *av; |
540 |
+ |
{ |
541 |
+ |
#ifdef DEBUG |
542 |
+ |
if (i_avlist >= nambvals) |
543 |
+ |
error(CONSISTENCY, "too many ambient values in av2list1"); |
544 |
+ |
#endif |
545 |
+ |
avlist1[i_avlist] = avlist2[i_avlist] = av; |
546 |
+ |
i_avlist++; |
547 |
+ |
} |
548 |
+ |
|
549 |
+ |
|
550 |
+ |
static int |
551 |
+ |
alatcmp(avp1, avp2) /* compare ambient values for MRA */ |
552 |
+ |
AMBVAL **avp1, **avp2; |
553 |
+ |
{ |
554 |
+ |
return((**avp2).latick - (**avp1).latick); |
555 |
+ |
} |
556 |
+ |
|
557 |
+ |
|
558 |
+ |
static int |
559 |
+ |
aposcmp(avp1, avp2) /* compare ambient value positions */ |
560 |
+ |
AMBVAL **avp1, **avp2; |
561 |
+ |
{ |
562 |
+ |
return(*avp1 - *avp2); |
563 |
+ |
} |
564 |
+ |
|
565 |
+ |
|
566 |
+ |
#ifdef DEBUG |
567 |
+ |
static int |
568 |
+ |
avlmemi(avaddr) /* find list position from address */ |
569 |
+ |
AMBVAL *avaddr; |
570 |
+ |
{ |
571 |
+ |
register AMBVAL **avlpp; |
572 |
+ |
|
573 |
+ |
avlpp = (AMBVAL **)bsearch((char *)&avaddr, (char *)avlist2, |
574 |
+ |
nambvals, sizeof(AMBVAL *), aposcmp); |
575 |
+ |
if (avlpp == NULL) |
576 |
+ |
error(CONSISTENCY, "address not found in avlmemi"); |
577 |
+ |
return(avlpp - avlist2); |
578 |
+ |
} |
579 |
+ |
#else |
580 |
+ |
#define avlmemi(avaddr) ((AMBVAL **)bsearch((char *)&avaddr,(char *)avlist2, \ |
581 |
+ |
nambvals,sizeof(AMBVAL *),aposcmp) - avlist2) |
582 |
+ |
#endif |
583 |
+ |
|
584 |
+ |
|
585 |
+ |
static |
586 |
+ |
sortambvals(always) /* resort ambient values */ |
587 |
+ |
int always; |
588 |
+ |
{ |
589 |
+ |
AMBTREE oldatrunk; |
590 |
+ |
AMBVAL tav, *tap, *pnext; |
591 |
+ |
register int i, j; |
592 |
+ |
/* see if it's time yet */ |
593 |
+ |
if (!always && (ambclock < lastsort+sortintvl || |
594 |
+ |
nambvals < SORT_THRESH)) |
595 |
+ |
return; |
596 |
+ |
/* |
597 |
+ |
* The idea here is to minimize memory thrashing |
598 |
+ |
* in VM systems by improving reference locality. |
599 |
+ |
* We do this by periodically sorting our stored ambient |
600 |
+ |
* values in memory in order of most recently to least |
601 |
+ |
* recently accessed. This ordering was chosen so that new |
602 |
+ |
* ambient values (which tend to be less important) go into |
603 |
+ |
* higher memory with the infrequently accessed values. |
604 |
+ |
* Since we expect our values to need sorting less |
605 |
+ |
* frequently as the process continues, we double our |
606 |
+ |
* waiting interval after each call. |
607 |
+ |
* This routine is also called by setambacc() with |
608 |
+ |
* the "always" parameter set to 1 so that the ambient |
609 |
+ |
* tree will be rebuilt with the new accuracy parameter. |
610 |
+ |
*/ |
611 |
+ |
if (tracktime) { /* allocate pointer arrays to sort */ |
612 |
+ |
avlist1 = (AMBVAL **)malloc(nambvals*sizeof(AMBVAL *)); |
613 |
+ |
avlist2 = (AMBVAL **)malloc(nambvals*sizeof(AMBVAL *)); |
614 |
+ |
} else |
615 |
+ |
avlist1 = avlist2 = NULL; |
616 |
+ |
if (avlist2 == NULL) { /* no time tracking -- rebuild tree? */ |
617 |
+ |
if (avlist1 != NULL) |
618 |
+ |
free((char *)avlist1); |
619 |
+ |
if (always) { /* rebuild without sorting */ |
620 |
+ |
copystruct(&oldatrunk, &atrunk); |
621 |
+ |
atrunk.alist = NULL; |
622 |
+ |
atrunk.kid = NULL; |
623 |
+ |
unloadatree(&oldatrunk, avinsert); |
624 |
+ |
} |
625 |
+ |
} else { /* sort memory by last access time */ |
626 |
+ |
/* |
627 |
+ |
* Sorting memory is tricky because it isn't contiguous. |
628 |
+ |
* We have to sort an array of pointers by MRA and also |
629 |
+ |
* by memory position. We then copy values in "loops" |
630 |
+ |
* to minimize memory hits. Nevertheless, we will visit |
631 |
+ |
* everyone at least twice, and this is an expensive process |
632 |
+ |
* when we're thrashing, which is when we need to do it. |
633 |
+ |
*/ |
634 |
+ |
#ifdef DEBUG |
635 |
+ |
sprintf(errmsg, "sorting %u ambient values at ambclock=%lu...", |
636 |
+ |
nambvals, ambclock); |
637 |
+ |
eputs(errmsg); |
638 |
+ |
#endif |
639 |
+ |
i_avlist = 0; |
640 |
+ |
unloadatree(&atrunk, av2list); /* empty current tree */ |
641 |
+ |
#ifdef DEBUG |
642 |
+ |
if (i_avlist < nambvals) |
643 |
+ |
error(CONSISTENCY, "missing ambient values in sortambvals"); |
644 |
+ |
#endif |
645 |
+ |
qsort((char *)avlist1, nambvals, sizeof(AMBVAL *), alatcmp); |
646 |
+ |
qsort((char *)avlist2, nambvals, sizeof(AMBVAL *), aposcmp); |
647 |
+ |
for (i = 0; i < nambvals; i++) { |
648 |
+ |
if (avlist1[i] == NULL) |
649 |
+ |
continue; |
650 |
+ |
tap = avlist2[i]; |
651 |
+ |
copystruct(&tav, tap); |
652 |
+ |
for (j = i; (pnext = avlist1[j]) != tap; |
653 |
+ |
j = avlmemi(pnext)) { |
654 |
+ |
copystruct(avlist2[j], pnext); |
655 |
+ |
avinsert(avlist2[j]); |
656 |
+ |
avlist1[j] = NULL; |
657 |
+ |
} |
658 |
+ |
copystruct(avlist2[j], &tav); |
659 |
+ |
avinsert(avlist2[j]); |
660 |
+ |
avlist1[j] = NULL; |
661 |
+ |
} |
662 |
+ |
free((char *)avlist1); |
663 |
+ |
free((char *)avlist2); |
664 |
+ |
/* compute new sort interval */ |
665 |
+ |
sortintvl = ambclock - lastsort; |
666 |
+ |
if (sortintvl > MAX_SORT_INTVL) |
667 |
+ |
sortintvl = MAX_SORT_INTVL; |
668 |
+ |
else |
669 |
+ |
sortintvl <<= 1; /* wait twice as long next */ |
670 |
+ |
#ifdef DEBUG |
671 |
+ |
eputs("done\n"); |
672 |
+ |
#endif |
673 |
+ |
} |
674 |
+ |
if (ambclock >= MAXACLOCK) |
675 |
+ |
ambclock = MAXACLOCK/2; |
676 |
+ |
lastsort = ambclock; |
677 |
+ |
} |
678 |
+ |
|
679 |
+ |
|
680 |
|
#ifdef F_SETLKW |
681 |
|
|
682 |
|
static |
722 |
|
avinsert(avstore(&avs)); |
723 |
|
n -= AMBVALSIZ; |
724 |
|
} |
725 |
< |
if (n) /* alignment */ |
725 |
> |
/*** seek always as safety measure |
726 |
> |
if (n) ***/ /* alignment */ |
727 |
|
if (lseek(fileno(ambfp), flen-n, 0) < 0) |
728 |
|
goto seekerr; |
729 |
|
} |