| 22 |
|
#define PCTFREE 20 /* maximum fraction to free (%) */ |
| 23 |
|
#endif |
| 24 |
|
|
| 25 |
< |
#define MAXFRAG (128*FRAGBLK) /* maximum fragments per file */ |
| 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 |
+ |
|
| 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); |
| 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; |
| 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 */ |
| 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 |
|
|
