| 16 |
|
#define CACHESIZE 16 /* default cache size (Mbytes, 0==inf) */ |
| 17 |
|
#endif |
| 18 |
|
#ifndef FREEBEAMS |
| 19 |
< |
#define FREEBEAMS 1024 /* maximum beams to free at a time */ |
| 19 |
> |
#define FREEBEAMS 512 /* maximum beams to free at a time */ |
| 20 |
|
#endif |
| 21 |
|
#ifndef PCTFREE |
| 22 |
< |
#define PCTFREE 12 /* maximum fraction to free (%) */ |
| 22 |
> |
#define PCTFREE 20 /* maximum fraction to free (%) */ |
| 23 |
|
#endif |
| 24 |
< |
#ifndef FFDMAX |
| 25 |
< |
#define FFDMAX 64 /* max. file descriptor for tracking */ |
| 24 |
> |
|
| 25 |
> |
/* define MAXFRAG if you want to limit fragment tracking memory */ |
| 26 |
> |
|
| 27 |
> |
#ifndef BSD |
| 28 |
> |
#define write writebuf /* safe i/o routines */ |
| 29 |
> |
#define read readbuf |
| 30 |
|
#endif |
| 27 |
– |
#ifndef MAXFRAG |
| 28 |
– |
#define MAXFRAG 2048 /* maximum fragments tracked in each file */ |
| 29 |
– |
#endif |
| 31 |
|
|
| 32 |
+ |
#define FRAGBLK 64 /* number of fragments to allocate at a time */ |
| 33 |
+ |
|
| 34 |
|
int hdcachesize = CACHESIZE*1024*1024; /* target cache size (bytes) */ |
| 35 |
|
unsigned long hdclock; /* clock value */ |
| 36 |
|
|
| 39 |
|
static struct fragment { |
| 40 |
|
short nlinks; /* number of holodeck sections using us */ |
| 41 |
|
short nfrags; /* number of known fragments */ |
| 42 |
< |
BEAMI fi[MAXFRAG]; /* fragments, descending file position */ |
| 42 |
> |
BEAMI *fi; /* fragments, descending file position */ |
| 43 |
|
long flen; /* last known file length */ |
| 44 |
< |
} *hdfrag[FFDMAX]; /* fragment lists, indexed by file descriptor */ |
| 44 |
> |
} *hdfrag; /* fragment lists, indexed by file descriptor */ |
| 45 |
|
|
| 46 |
+ |
static int nhdfrags; /* size of hdfrag array */ |
| 47 |
|
|
| 48 |
+ |
|
| 49 |
|
hdattach(fd) /* start tracking file fragments for some section */ |
| 50 |
|
register int fd; |
| 51 |
|
{ |
| 52 |
< |
if (fd >= FFDMAX) |
| 53 |
< |
return; /* descriptor out of range */ |
| 54 |
< |
if (hdfrag[fd] == NULL) { |
| 55 |
< |
if ((hdfrag[fd] = (struct fragment *) |
| 56 |
< |
malloc(sizeof(struct fragment))) == NULL) |
| 57 |
< |
return; /* should flag error? */ |
| 58 |
< |
hdfrag[fd]->nlinks = 0; |
| 59 |
< |
hdfrag[fd]->nfrags = 0; |
| 52 |
> |
if (fd >= nhdfrags) { |
| 53 |
> |
if (nhdfrags) |
| 54 |
> |
hdfrag = (struct fragment *)realloc((char *)hdfrag, |
| 55 |
> |
(fd+1)*sizeof(struct fragment)); |
| 56 |
> |
else |
| 57 |
> |
hdfrag = (struct fragment *)malloc( |
| 58 |
> |
(fd+1)*sizeof(struct fragment)); |
| 59 |
> |
if (hdfrag == NULL) |
| 60 |
> |
error(SYSTEM, "out of memory in hdattach"); |
| 61 |
> |
bzero((char *)(hdfrag+nhdfrags), |
| 62 |
> |
(fd+1-nhdfrags)*sizeof(struct fragment)); |
| 63 |
> |
nhdfrags = fd+1; |
| 64 |
|
} |
| 65 |
< |
hdfrag[fd]->nlinks++; |
| 66 |
< |
hdfrag[fd]->flen = lseek(fd, 0L, 2); /* get file length */ |
| 65 |
> |
hdfrag[fd].nlinks++; |
| 66 |
> |
hdfrag[fd].flen = lseek(fd, 0L, 2); /* get file length */ |
| 67 |
|
} |
| 68 |
|
|
| 69 |
|
|
| 73 |
|
hdrelease(fd) /* stop tracking file fragments for some section */ |
| 74 |
|
register int fd; |
| 75 |
|
{ |
| 76 |
< |
if (fd >= FFDMAX || hdfrag[fd] == NULL) |
| 76 |
> |
if (fd < 0 | fd >= nhdfrags || !hdfrag[fd].nlinks) |
| 77 |
|
return; |
| 78 |
< |
if (!--hdfrag[fd]->nlinks) { |
| 79 |
< |
free((char *)hdfrag[fd]); |
| 80 |
< |
hdfrag[fd] = NULL; |
| 78 |
> |
if (!--hdfrag[fd].nlinks && hdfrag[fd].nfrags) { |
| 79 |
> |
free((char *)hdfrag[fd].fi); |
| 80 |
> |
hdfrag[fd].fi = NULL; |
| 81 |
> |
hdfrag[fd].nfrags = 0; |
| 82 |
|
} |
| 83 |
|
} |
| 84 |
|
|
| 85 |
|
|
| 86 |
+ |
markdirty(hp) /* mark holodeck section directory dirty */ |
| 87 |
+ |
register HOLO *hp; |
| 88 |
+ |
{ |
| 89 |
+ |
static BEAMI smudge = {0, -1}; |
| 90 |
+ |
|
| 91 |
+ |
if (hp->dirty) /* already marked? */ |
| 92 |
+ |
return; |
| 93 |
+ |
hp->dirty = 1; |
| 94 |
+ |
if (lseek(hp->fd, biglob(hp)->fo+(nbeams(hp)-1)*sizeof(BEAMI), 0) < 0 |
| 95 |
+ |
|| write(hp->fd, (char *)&smudge, |
| 96 |
+ |
sizeof(BEAMI)) != sizeof(BEAMI)) |
| 97 |
+ |
error(SYSTEM, "seek/write error in markdirty"); |
| 98 |
+ |
} |
| 99 |
+ |
|
| 100 |
+ |
|
| 101 |
|
HOLO * |
| 102 |
|
hdinit(fd, hproto) /* initialize a holodeck section in a file */ |
| 103 |
|
int fd; /* corresponding file descriptor */ |
| 122 |
|
n = nbeams(hp)*sizeof(BEAMI); |
| 123 |
|
if (read(fd, (char *)(hp->bi+1), n) != n) |
| 124 |
|
error(SYSTEM, "failure loading holodeck directory"); |
| 125 |
+ |
/* check that it's clean */ |
| 126 |
+ |
if (hp->bi[nbeams(hp)].fo < 0) |
| 127 |
+ |
error(USER, "dirty holodeck section"); |
| 128 |
|
} else { /* assume we're creating it */ |
| 129 |
|
if ((hp = hdalloc(hproto)) == NULL) |
| 130 |
|
goto memerr; |
| 170 |
|
} |
| 171 |
|
if (!hp->dirty) /* check first */ |
| 172 |
|
return(0); |
| 173 |
+ |
errno = 0; |
| 174 |
|
if (lseek(hp->fd, biglob(hp)->fo, 0) < 0) |
| 175 |
|
error(SYSTEM, "cannot seek on holodeck file"); |
| 176 |
|
n = nbeams(hp)*sizeof(BEAMI); |
| 200 |
|
} |
| 201 |
|
} |
| 202 |
|
if (all) |
| 203 |
< |
for (j = 0; j < FFDMAX; j++) |
| 204 |
< |
if (hdfrag[j] != NULL) |
| 205 |
< |
total += sizeof(struct fragment); |
| 203 |
> |
for (j = 0; j < nhdfrags; j++) { |
| 204 |
> |
total += sizeof(struct fragment); |
| 205 |
> |
if (hdfrag[j].nfrags) |
| 206 |
> |
total += FRAGBLK*sizeof(BEAMI) * |
| 207 |
> |
((hdfrag[j].nfrags-1)/FRAGBLK + 1) ; |
| 208 |
> |
} |
| 209 |
|
return(total); |
| 210 |
|
} |
| 211 |
|
|
| 212 |
|
|
| 213 |
|
long |
| 214 |
+ |
hdfilen(fd) /* return file length for fd */ |
| 215 |
+ |
int fd; |
| 216 |
+ |
{ |
| 217 |
+ |
long fpos, flen; |
| 218 |
+ |
|
| 219 |
+ |
if (fd < 0) |
| 220 |
+ |
return(-1); |
| 221 |
+ |
if (fd >= nhdfrags || !hdfrag[fd].nlinks) { |
| 222 |
+ |
if ((fpos = lseek(fd, 0L, 1)) < 0) |
| 223 |
+ |
return(-1); |
| 224 |
+ |
flen = lseek(fd, 0L, 2); |
| 225 |
+ |
lseek(fd, fpos, 0); |
| 226 |
+ |
return(flen); |
| 227 |
+ |
} |
| 228 |
+ |
return(hdfrag[fd].flen); |
| 229 |
+ |
} |
| 230 |
+ |
|
| 231 |
+ |
|
| 232 |
+ |
long |
| 233 |
|
hdfiluse(fd, all) /* compute file usage (in bytes) */ |
| 234 |
|
int fd; /* open file descriptor to check */ |
| 235 |
|
int all; /* include overhead and unflushed data */ |
| 272 |
|
hp->bl[i]->tick = hdclock; /* preempt swap */ |
| 273 |
|
if (hdcachesize > 0 && hdmemuse(0) >= hdcachesize) |
| 274 |
|
hdfreecache(PCTFREE, NULL); /* free some space */ |
| 275 |
+ |
errno = 0; |
| 276 |
|
if (hp->bl[i] == NULL) { /* allocate (and load) */ |
| 277 |
|
n = hp->bi[i].nrd + nr; |
| 278 |
|
if ((hp->bl[i] = (BEAM *)malloc(hdbsiz(n))) == NULL) |
| 344 |
|
if (hp->bi[i].nrd == nrays) /* current one will do? */ |
| 345 |
|
return(0); |
| 346 |
|
|
| 347 |
< |
if (hp->fd >= FFDMAX || hdfrag[hp->fd] == NULL) /* untracked */ |
| 347 |
> |
if (hp->fd >= nhdfrags || !hdfrag[hp->fd].nlinks) /* untracked */ |
| 348 |
|
hp->bi[i].fo = lseek(hp->fd, 0L, 2); |
| 349 |
|
|
| 350 |
|
else if (hp->bi[i].fo + hp->bi[i].nrd*sizeof(RAYVAL) == |
| 351 |
< |
hdfrag[hp->fd]->flen) /* EOF special case */ |
| 352 |
< |
hdfrag[hp->fd]->flen = hp->bi[i].fo + nrays*sizeof(RAYVAL); |
| 351 |
> |
hdfrag[hp->fd].flen) /* EOF special case */ |
| 352 |
> |
hdfrag[hp->fd].flen = hp->bi[i].fo + nrays*sizeof(RAYVAL); |
| 353 |
|
|
| 354 |
|
else { /* general case */ |
| 355 |
< |
register struct fragment *f = hdfrag[hp->fd]; |
| 355 |
> |
register struct fragment *f = &hdfrag[hp->fd]; |
| 356 |
|
register int j, k; |
| 357 |
|
/* relinquish old fragment */ |
| 358 |
< |
if ((j = ++f->nfrags) >= MAXFRAG) |
| 359 |
< |
f->nfrags--; |
| 360 |
< |
for ( ; ; ) { /* stick it in our descending list */ |
| 361 |
< |
if (!--j || hp->bi[i].fo < f->fi[j-1].fo) { |
| 362 |
< |
f->fi[j].fo = hp->bi[i].fo; |
| 363 |
< |
f->fi[j].nrd = hp->bi[i].nrd; |
| 364 |
< |
break; |
| 358 |
> |
if (hp->bi[i].nrd) { |
| 359 |
> |
j = f->nfrags++; |
| 360 |
> |
#ifdef MAXFRAG |
| 361 |
> |
if (j >= MAXFRAG-1) |
| 362 |
> |
f->nfrags--; |
| 363 |
> |
#endif |
| 364 |
> |
if (j % FRAGBLK == 0) { /* more frag. space */ |
| 365 |
> |
if (f->fi == NULL) |
| 366 |
> |
f->fi = (BEAMI *)malloc( |
| 367 |
> |
FRAGBLK*sizeof(BEAMI)); |
| 368 |
> |
else |
| 369 |
> |
f->fi = (BEAMI *)realloc((char *)f->fi, |
| 370 |
> |
(j+FRAGBLK)*sizeof(BEAMI)); |
| 371 |
> |
if (f->fi == NULL) |
| 372 |
> |
error(SYSTEM, |
| 373 |
> |
"out of memory in hdgetbi"); |
| 374 |
|
} |
| 375 |
< |
copystruct(f->fi+j, f->fi+j-1); |
| 376 |
< |
} |
| 375 |
> |
for ( ; ; j--) { /* insert in descending list */ |
| 376 |
> |
if (!j || hp->bi[i].fo < f->fi[j-1].fo) { |
| 377 |
> |
f->fi[j].fo = hp->bi[i].fo; |
| 378 |
> |
f->fi[j].nrd = hp->bi[i].nrd; |
| 379 |
> |
break; |
| 380 |
> |
} |
| 381 |
> |
copystruct(f->fi+j, f->fi+j-1); |
| 382 |
> |
} |
| 383 |
|
/* coalesce adjacent fragments */ |
| 384 |
< |
for (j = k = 0; k < f->nfrags; j++, k++) { |
| 385 |
< |
if (j != k) |
| 386 |
< |
copystruct(f->fi+j, f->fi+k); |
| 387 |
< |
while (k+1 < f->nfrags && |
| 388 |
< |
f->fi[k+1].fo + f->fi[k+1].nrd*sizeof(RAYVAL) == |
| 389 |
< |
f->fi[j].fo) |
| 390 |
< |
f->fi[j].fo -= f->fi[++k].nrd*sizeof(RAYVAL); |
| 384 |
> |
for (j = k = 0; k < f->nfrags; j++, k++) { |
| 385 |
> |
if (k > j) |
| 386 |
> |
copystruct(f->fi+j, f->fi+k); |
| 387 |
> |
while (k+1 < f->nfrags && f->fi[k+1].fo + |
| 388 |
> |
f->fi[k+1].nrd*sizeof(RAYVAL) |
| 389 |
> |
== f->fi[j].fo) { |
| 390 |
> |
f->fi[j].fo -= |
| 391 |
> |
f->fi[++k].nrd*sizeof(RAYVAL); |
| 392 |
> |
f->fi[j].nrd += f->fi[k].nrd; |
| 393 |
> |
} |
| 394 |
> |
} |
| 395 |
> |
f->nfrags = j; |
| 396 |
|
} |
| 325 |
– |
f->nfrags = j; |
| 397 |
|
k = -1; /* find closest-sized fragment */ |
| 398 |
|
for (j = f->nfrags; j-- > 0; ) |
| 399 |
|
if (f->fi[j].nrd >= nrays && |
| 400 |
< |
(k < 0 || f->fi[j].nrd < f->fi[k].nrd) |
| 401 |
< |
&& f->fi[k=j].nrd == nrays) |
| 402 |
< |
break; |
| 400 |
> |
(k < 0 || f->fi[j].nrd < f->fi[k].nrd)) |
| 401 |
> |
if (f->fi[k=j].nrd == nrays) |
| 402 |
> |
break; |
| 403 |
|
if (k < 0) { /* no fragment -- extend file */ |
| 404 |
|
hp->bi[i].fo = f->flen; |
| 405 |
|
f->flen += nrays*sizeof(RAYVAL); |
| 417 |
|
} |
| 418 |
|
biglob(hp)->nrd += nrays - hp->bi[i].nrd; |
| 419 |
|
hp->bi[i].nrd = nrays; |
| 420 |
< |
hp->dirty++; /* section directory now out of date */ |
| 420 |
> |
markdirty(hp); /* section directory now out of date */ |
| 421 |
|
return(1); |
| 422 |
|
} |
| 423 |
|
|
| 435 |
|
nchanged += hdfreebeam(hdlist[i], 0); |
| 436 |
|
return(nchanged); |
| 437 |
|
} |
| 438 |
+ |
if (hp->fd < 0) /* check for recursive error */ |
| 439 |
+ |
return(-1); |
| 440 |
|
if (i == 0) { /* clear entire holodeck */ |
| 441 |
|
nchanged = 0; |
| 442 |
< |
for (i = 1; i <= nbeams(hp); i++) |
| 443 |
< |
nchanged += hdfreebeam(hp, i); |
| 442 |
> |
for (i = nbeams(hp); i > 0; i--) |
| 443 |
> |
if (hp->bl[i] != NULL) |
| 444 |
> |
nchanged += hdfreebeam(hp, i); |
| 445 |
|
return(nchanged); |
| 446 |
|
} |
| 447 |
|
if (i < 1 | i > nbeams(hp)) |
| 456 |
|
if (lseek(hp->fd, hp->bi[i].fo, 0) < 0) |
| 457 |
|
error(SYSTEM, "cannot seek on holodeck file"); |
| 458 |
|
n = hp->bl[i]->nrm * sizeof(RAYVAL); |
| 459 |
< |
if (write(hp->fd, (char *)hdbray(hp->bl[i]), n) != n) |
| 459 |
> |
if (write(hp->fd, (char *)hdbray(hp->bl[i]), n) != n) { |
| 460 |
> |
hp->fd = -1; /* avoid recursive error */ |
| 461 |
|
error(SYSTEM, "write error in hdfreebeam"); |
| 462 |
+ |
} |
| 463 |
|
} |
| 464 |
|
blglob(hp)->nrm -= hp->bl[i]->nrm; |
| 465 |
|
free((char *)hp->bl[i]); /* free memory */ |
| 468 |
|
} |
| 469 |
|
|
| 470 |
|
|
| 471 |
+ |
int |
| 472 |
+ |
hdkillbeam(hp, i) /* delete beam from holodeck */ |
| 473 |
+ |
register HOLO *hp; |
| 474 |
+ |
register int i; |
| 475 |
+ |
{ |
| 476 |
+ |
static BEAM emptybeam; |
| 477 |
+ |
int nchanged, n; |
| 478 |
+ |
|
| 479 |
+ |
if (hp == NULL) { /* clobber all holodecks */ |
| 480 |
+ |
nchanged = 0; |
| 481 |
+ |
for (i = 0; hdlist[i] != NULL; i++) |
| 482 |
+ |
nchanged += hdkillbeam(hdlist[i], 0); |
| 483 |
+ |
return(nchanged); |
| 484 |
+ |
} |
| 485 |
+ |
if (i == 0) { /* clobber entire holodeck */ |
| 486 |
+ |
nchanged = 0; |
| 487 |
+ |
for (i = nbeams(hp); i > 0; i--) |
| 488 |
+ |
if (hp->bi[i].nrd > 0 || hp->bl[i] != NULL) |
| 489 |
+ |
nchanged += hdkillbeam(hp, i); |
| 490 |
+ |
#ifdef DEBUG |
| 491 |
+ |
if (biglob(hp)->nrd != 0 | blglob(hp)->nrm != 0) |
| 492 |
+ |
error(CONSISTENCY, "bad beam count in hdkillbeam"); |
| 493 |
+ |
#endif |
| 494 |
+ |
return(nchanged); |
| 495 |
+ |
} |
| 496 |
+ |
if (i < 1 | i > nbeams(hp)) |
| 497 |
+ |
error(CONSISTENCY, "bad beam index to hdkillbeam"); |
| 498 |
+ |
if (hp->bl[i] != NULL) { /* free memory */ |
| 499 |
+ |
blglob(hp)->nrm -= nchanged = hp->bl[i]->nrm; |
| 500 |
+ |
free((char *)hp->bl[i]); |
| 501 |
+ |
} else |
| 502 |
+ |
nchanged = hp->bi[i].nrd; |
| 503 |
+ |
if (hp->bi[i].nrd) { /* free file fragment */ |
| 504 |
+ |
hp->bl[i] = &emptybeam; |
| 505 |
+ |
hdgetbi(hp, i); |
| 506 |
+ |
} |
| 507 |
+ |
hp->bl[i] = NULL; |
| 508 |
+ |
return(nchanged); |
| 509 |
+ |
} |
| 510 |
+ |
|
| 511 |
+ |
|
| 512 |
|
hdlrulist(ha, ba, n, hp) /* add beams from holodeck to LRU list */ |
| 513 |
|
register HOLO *ha[]; /* section list (NULL terminated) */ |
| 514 |
|
register int ba[]; /* beam index to go with section */ |
| 522 |
|
; |
| 523 |
|
nents = j; |
| 524 |
|
/* insert each beam from hp */ |
| 525 |
< |
for (i = nbeams(hp); i > 0; i-- ) { |
| 525 |
> |
for (i = nbeams(hp); i > 0; i--) { |
| 526 |
|
if (hp->bl[i] == NULL) /* check if loaded */ |
| 527 |
|
continue; |
| 528 |
|
if ((j = ++nents) > n) /* grow list if we can */ |