22 |
|
#define PCTFREE 20 /* maximum fraction to free (%) */ |
23 |
|
#endif |
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 |
31 |
|
|
30 |
– |
#define MAXFRAG (128*FRAGBLK) /* maximum fragments per file */ |
31 |
– |
|
32 |
|
#define FRAGBLK 64 /* number of fragments to allocate at a time */ |
33 |
|
|
34 |
|
int hdcachesize = CACHESIZE*1024*1024; /* target cache size (bytes) */ |
73 |
|
hdrelease(fd) /* stop tracking file fragments for some section */ |
74 |
|
register int fd; |
75 |
|
{ |
76 |
< |
if (fd >= nhdfrags || !hdfrag[fd].nlinks) |
76 |
> |
if (fd < 0 | fd >= nhdfrags || !hdfrag[fd].nlinks) |
77 |
|
return; |
78 |
|
if (!--hdfrag[fd].nlinks && hdfrag[fd].nfrags) { |
79 |
|
free((char *)hdfrag[fd].fi); |
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 */ |
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 */ |