| 22 |
|
#define PCTFREE 20 /* maximum fraction to free (%) */ |
| 23 |
|
#endif |
| 24 |
|
#ifndef MAXFRAG |
| 25 |
< |
#define MAXFRAG 131000 /* maximum fragments/file to track (0==inf) */ |
| 25 |
> |
#define MAXFRAG 32767 /* maximum fragments/file to track (0==inf) */ |
| 26 |
|
#endif |
| 27 |
|
|
| 28 |
|
#ifndef BSD |
| 30 |
|
#define read readbuf |
| 31 |
|
#endif |
| 32 |
|
|
| 33 |
< |
#define FRAGBLK 64 /* number of fragments to allocate at a time */ |
| 33 |
> |
#define FRAGBLK 256 /* number of fragments to allocate at a time */ |
| 34 |
|
|
| 35 |
|
unsigned hdcachesize = CACHESIZE*1024*1024; /* target cache size */ |
| 36 |
|
unsigned long hdclock; /* clock value */ |
| 37 |
|
|
| 38 |
|
HOLO *hdlist[HDMAX+1]; /* holodeck pointers (NULL term.) */ |
| 39 |
|
|
| 40 |
< |
static struct fragment { |
| 40 |
> |
static struct fraglist { |
| 41 |
|
short nlinks; /* number of holodeck sections using us */ |
| 42 |
|
short writerr; /* write error encountered */ |
| 43 |
|
int nfrags; /* number of known fragments */ |
| 44 |
|
BEAMI *fi; /* fragments, descending file position */ |
| 45 |
|
long flen; /* last known file length */ |
| 46 |
< |
} *hdfrag; /* fragment lists, indexed by file descriptor */ |
| 46 |
> |
} *hdfragl; /* fragment lists, indexed by file descriptor */ |
| 47 |
|
|
| 48 |
< |
static int nhdfrags; /* size of hdfrag array */ |
| 48 |
> |
static int nhdfragls; /* size of hdfragl array */ |
| 49 |
|
|
| 50 |
|
|
| 51 |
|
hdattach(fd) /* start tracking file fragments for some section */ |
| 52 |
|
register int fd; |
| 53 |
|
{ |
| 54 |
< |
if (fd >= nhdfrags) { |
| 55 |
< |
if (nhdfrags) |
| 56 |
< |
hdfrag = (struct fragment *)realloc((char *)hdfrag, |
| 57 |
< |
(fd+1)*sizeof(struct fragment)); |
| 54 |
> |
if (fd >= nhdfragls) { |
| 55 |
> |
if (nhdfragls) |
| 56 |
> |
hdfragl = (struct fraglist *)realloc((char *)hdfragl, |
| 57 |
> |
(fd+1)*sizeof(struct fraglist)); |
| 58 |
|
else |
| 59 |
< |
hdfrag = (struct fragment *)malloc( |
| 60 |
< |
(fd+1)*sizeof(struct fragment)); |
| 61 |
< |
if (hdfrag == NULL) |
| 59 |
> |
hdfragl = (struct fraglist *)malloc( |
| 60 |
> |
(fd+1)*sizeof(struct fraglist)); |
| 61 |
> |
if (hdfragl == NULL) |
| 62 |
|
error(SYSTEM, "out of memory in hdattach"); |
| 63 |
< |
bzero((char *)(hdfrag+nhdfrags), |
| 64 |
< |
(fd+1-nhdfrags)*sizeof(struct fragment)); |
| 65 |
< |
nhdfrags = fd+1; |
| 63 |
> |
bzero((char *)(hdfragl+nhdfragls), |
| 64 |
> |
(fd+1-nhdfragls)*sizeof(struct fraglist)); |
| 65 |
> |
nhdfragls = fd+1; |
| 66 |
|
} |
| 67 |
< |
hdfrag[fd].nlinks++; |
| 68 |
< |
hdfrag[fd].flen = lseek(fd, 0L, 2); /* get file length */ |
| 67 |
> |
hdfragl[fd].nlinks++; |
| 68 |
> |
hdfragl[fd].flen = lseek(fd, 0L, 2); /* get file length */ |
| 69 |
|
} |
| 70 |
|
|
| 71 |
|
|
| 75 |
|
hdrelease(fd) /* stop tracking file fragments for some section */ |
| 76 |
|
register int fd; |
| 77 |
|
{ |
| 78 |
< |
if (fd < 0 | fd >= nhdfrags || !hdfrag[fd].nlinks) |
| 78 |
> |
if (fd < 0 | fd >= nhdfragls || !hdfragl[fd].nlinks) |
| 79 |
|
return; |
| 80 |
< |
if (!--hdfrag[fd].nlinks && hdfrag[fd].nfrags) { |
| 81 |
< |
free((char *)hdfrag[fd].fi); |
| 82 |
< |
hdfrag[fd].fi = NULL; |
| 83 |
< |
hdfrag[fd].nfrags = 0; |
| 80 |
> |
if (!--hdfragl[fd].nlinks && hdfragl[fd].nfrags) { |
| 81 |
> |
free((char *)hdfragl[fd].fi); |
| 82 |
> |
hdfragl[fd].fi = NULL; |
| 83 |
> |
hdfragl[fd].nfrags = 0; |
| 84 |
|
} |
| 85 |
|
} |
| 86 |
|
|
| 213 |
|
} |
| 214 |
|
} |
| 215 |
|
if (all) |
| 216 |
< |
for (j = 0; j < nhdfrags; j++) { |
| 217 |
< |
total += sizeof(struct fragment); |
| 218 |
< |
if (hdfrag[j].nfrags) |
| 216 |
> |
for (j = 0; j < nhdfragls; j++) { |
| 217 |
> |
total += sizeof(struct fraglist); |
| 218 |
> |
if (hdfragl[j].nfrags) |
| 219 |
|
total += FRAGBLK*sizeof(BEAMI) * |
| 220 |
< |
((hdfrag[j].nfrags-1)/FRAGBLK + 1) ; |
| 220 |
> |
((hdfragl[j].nfrags-1)/FRAGBLK + 1) ; |
| 221 |
|
} |
| 222 |
|
return(total); |
| 223 |
|
} |
| 231 |
|
|
| 232 |
|
if (fd < 0) |
| 233 |
|
return(-1); |
| 234 |
< |
if (fd >= nhdfrags || !hdfrag[fd].nlinks) { |
| 234 |
> |
if (fd >= nhdfragls || !hdfragl[fd].nlinks) { |
| 235 |
|
if ((fpos = lseek(fd, 0L, 1)) < 0) |
| 236 |
|
return(-1); |
| 237 |
|
flen = lseek(fd, 0L, 2); |
| 238 |
|
lseek(fd, fpos, 0); |
| 239 |
|
return(flen); |
| 240 |
|
} |
| 241 |
< |
return(hdfrag[fd].flen); |
| 241 |
> |
return(hdfragl[fd].flen); |
| 242 |
|
} |
| 243 |
|
|
| 244 |
|
|
| 348 |
|
|
| 349 |
|
|
| 350 |
|
int |
| 351 |
< |
hdfilord(hb1, hb2) /* order beams for optimal loading */ |
| 351 |
> |
hdfilord(hb1, hb2) /* order beams for quick loading */ |
| 352 |
|
register HDBEAMI *hb1, *hb2; |
| 353 |
|
{ |
| 354 |
< |
register int c; |
| 355 |
< |
/* sort by file descriptor first */ |
| 354 |
> |
register long c; |
| 355 |
> |
/* residents go first */ |
| 356 |
> |
if (hb2->h->bl[hb2->b] != NULL) |
| 357 |
> |
return(hb1->h->bl[hb1->b] == NULL); |
| 358 |
> |
if (hb1->h->bl[hb1->b] != NULL) |
| 359 |
> |
return(-1); |
| 360 |
> |
/* otherwise sort by file descriptor */ |
| 361 |
|
if ((c = hb1->h->fd - hb2->h->fd)) |
| 362 |
|
return(c); |
| 363 |
|
/* then by position in file */ |
| 364 |
< |
return(hb1->h->bi[hb1->b].fo - hb2->h->bi[hb2->b].fo); |
| 364 |
> |
c = hb1->h->bi[hb1->b].fo - hb2->h->bi[hb2->b].fo; |
| 365 |
> |
return(c > 0 ? 1 : c < 0 ? -1 : 0); |
| 366 |
|
} |
| 367 |
|
|
| 368 |
|
|
| 381 |
|
error(CONSISTENCY, "bad beam in hdloadbeams"); |
| 382 |
|
/* sort list for optimal access */ |
| 383 |
|
qsort((char *)hb, n, sizeof(HDBEAMI), hdfilord); |
| 384 |
< |
bytesloaded = needbytes = 0; /* figure out memory needs */ |
| 384 |
> |
bytesloaded = 0; /* run through loaded beams */ |
| 385 |
> |
for ( ; n && (bp = hb->h->bl[hb->b]) != NULL; n--, hb++) { |
| 386 |
> |
bp->tick = hdclock; /* preempt swap */ |
| 387 |
> |
bytesloaded += bp->nrm; |
| 388 |
> |
if (bf != NULL) |
| 389 |
> |
(*bf)(bp, hb->h, hb->b); |
| 390 |
> |
} |
| 391 |
> |
bytesloaded *= sizeof(RAYVAL); |
| 392 |
|
if ((origcachesize = hdcachesize) > 0) { |
| 393 |
+ |
needbytes = 0; /* figure out memory needs */ |
| 394 |
|
for (i = n; i--; ) |
| 395 |
< |
if ((bp = hb[i].h->bl[hb[i].b]) != NULL) { |
| 382 |
< |
bp->tick = hdclock; /* preempt swap */ |
| 383 |
< |
bytesloaded += bp->nrm; |
| 384 |
< |
} else /* prepare to load */ |
| 385 |
< |
needbytes += hb[i].h->bi[hb[i].b].nrd; |
| 386 |
< |
bytesloaded *= sizeof(RAYVAL); |
| 395 |
> |
needbytes += hb[i].h->bi[hb[i].b].nrd; |
| 396 |
|
needbytes *= sizeof(RAYVAL); |
| 397 |
|
do { /* free enough memory */ |
| 398 |
|
memuse = hdmemuse(0); |
| 399 |
< |
bytes2free = needbytes - (signed)(hdcachesize-memuse); |
| 400 |
< |
if (bytes2free > (signed)(memuse - bytesloaded)) |
| 399 |
> |
bytes2free = needbytes - (int)(hdcachesize-memuse); |
| 400 |
> |
if (bytes2free > (int)(memuse - bytesloaded)) |
| 401 |
|
bytes2free = memuse - bytesloaded; |
| 402 |
|
} while (bytes2free > 0 && |
| 403 |
|
hdfreecache(100*bytes2free/memuse, NULL) < 0); |
| 404 |
+ |
hdcachesize = 0; /* load beams w/o swap */ |
| 405 |
|
} |
| 396 |
– |
hdcachesize = 0; /* load the ordered beams w/o swap */ |
| 406 |
|
for (i = 0; i < n; i++) |
| 407 |
|
if ((bp = hdgetbeam(hb[i].h, hb[i].b)) != NULL && bf != NULL) |
| 408 |
|
(*bf)(bp, hb[i].h, hb[i].b); |
| 419 |
|
long nfo; |
| 420 |
|
unsigned int n; |
| 421 |
|
/* check file status */ |
| 422 |
< |
if (hdfrag[hp->fd].writerr) |
| 422 |
> |
if (hdfragl[hp->fd].writerr) |
| 423 |
|
return(-1); |
| 424 |
|
#ifdef DEBUG |
| 425 |
|
if (i < 1 | i > nbeams(hp)) |
| 429 |
|
if (hp->bl[i] == NULL || (nrays = hp->bl[i]->nrm) == hp->bi[i].nrd) |
| 430 |
|
return(0); |
| 431 |
|
/* locate fragment */ |
| 432 |
< |
if (hp->fd >= nhdfrags || !hdfrag[hp->fd].nlinks) /* untracked */ |
| 432 |
> |
if (hp->fd >= nhdfragls || !hdfragl[hp->fd].nlinks) /* untracked */ |
| 433 |
|
hp->bi[i].fo = lseek(hp->fd, 0L, 2); |
| 434 |
|
|
| 435 |
|
else if (hp->bi[i].fo + hp->bi[i].nrd*sizeof(RAYVAL) == |
| 436 |
< |
hdfrag[hp->fd].flen) /* EOF special case */ |
| 437 |
< |
hdfrag[hp->fd].flen = (nfo=hp->bi[i].fo) + nrays*sizeof(RAYVAL); |
| 436 |
> |
hdfragl[hp->fd].flen) /* EOF special case */ |
| 437 |
> |
hdfragl[hp->fd].flen = (nfo=hp->bi[i].fo) + nrays*sizeof(RAYVAL); |
| 438 |
|
|
| 439 |
|
else { /* general case */ |
| 440 |
< |
register struct fragment *f = &hdfrag[hp->fd]; |
| 440 |
> |
register struct fraglist *f = &hdfragl[hp->fd]; |
| 441 |
|
register int j, k; |
| 442 |
< |
/* relinquish old fragment */ |
| 442 |
> |
n = f->nfrags; /* relinquish old fragment */ |
| 443 |
|
if (hp->bi[i].nrd) { |
| 444 |
|
j = f->nfrags++; |
| 445 |
|
#if MAXFRAG |
| 470 |
|
f->fi[j].nrd*sizeof(RAYVAL)) { |
| 471 |
|
f->fi[j].nrd += f->fi[j-1].nrd; |
| 472 |
|
f->fi[j-1].nrd = 0; |
| 473 |
+ |
n = j-1; |
| 474 |
|
} |
| 475 |
|
if (j+1 < f->nfrags && f->fi[j].fo == f->fi[j+1].fo + |
| 476 |
|
f->fi[j+1].nrd*sizeof(RAYVAL)) { |
| 477 |
|
f->fi[j+1].nrd += f->fi[j].nrd; |
| 478 |
|
f->fi[j].nrd = 0; |
| 479 |
+ |
if (j < n) n = j; |
| 480 |
|
} |
| 481 |
|
} |
| 482 |
|
k = -1; /* find closest-sized fragment */ |
| 491 |
|
} else { /* else use fragment */ |
| 492 |
|
nfo = f->fi[k].fo; |
| 493 |
|
f->fi[k].fo += nrays*sizeof(RAYVAL); |
| 494 |
< |
f->fi[k].nrd -= nrays; |
| 494 |
> |
if (!(f->fi[k].nrd -= nrays) && k < n) |
| 495 |
> |
n = k; |
| 496 |
|
} |
| 497 |
|
/* delete empty remnants */ |
| 498 |
< |
for (j = k = 0; k < f->nfrags; j++, k++) { |
| 498 |
> |
for (j = k = n; k < f->nfrags; j++, k++) { |
| 499 |
|
while (f->fi[k].nrd == 0) |
| 500 |
|
if (++k >= f->nfrags) |
| 501 |
|
goto endloop; |
| 511 |
|
error(SYSTEM, "cannot seek on holodeck file"); |
| 512 |
|
n = hp->bl[i]->nrm * sizeof(RAYVAL); |
| 513 |
|
if (write(hp->fd, (char *)hdbray(hp->bl[i]), n) != n) { |
| 514 |
< |
hdfrag[hp->fd].writerr++; |
| 514 |
> |
hdfragl[hp->fd].writerr++; |
| 515 |
|
hdsync(hp, 0); /* sync directory */ |
| 516 |
|
error(SYSTEM, "write error in hdsyncbeam"); |
| 517 |
|
} |
| 537 |
|
nchanged += hdfreebeam(hdlist[i], 0); |
| 538 |
|
return(nchanged); |
| 539 |
|
} |
| 540 |
< |
if (hdfrag[hp->fd].writerr) /* check for file error */ |
| 540 |
> |
if (hdfragl[hp->fd].writerr) /* check for file error */ |
| 541 |
|
return(0); |
| 542 |
|
if (i == 0) { /* clear entire holodeck */ |
| 543 |
|
nchanged = 0; |
