| 48 |
|
static int nhdfragls; /* size of hdfragl array */ |
| 49 |
|
|
| 50 |
|
|
| 51 |
+ |
char * |
| 52 |
+ |
hdrealloc(ptr, siz, rout) /* (re)allocate memory, retry then error */ |
| 53 |
+ |
char *ptr; |
| 54 |
+ |
unsigned siz; |
| 55 |
+ |
char *rout; |
| 56 |
+ |
{ |
| 57 |
+ |
register char *newp; |
| 58 |
+ |
/* call malloc/realloc */ |
| 59 |
+ |
if (ptr == NULL) newp = (char *)malloc(siz); |
| 60 |
+ |
else newp = (char *)realloc(ptr, siz); |
| 61 |
+ |
/* check success */ |
| 62 |
+ |
if (newp == NULL && rout != NULL) { |
| 63 |
+ |
hdfreecache(25, NULL); /* free some memory */ |
| 64 |
+ |
errno = 0; /* retry */ |
| 65 |
+ |
newp = hdrealloc(ptr, siz, NULL); |
| 66 |
+ |
if (newp == NULL) { /* give up and report error */ |
| 67 |
+ |
sprintf(errmsg, "out of memory in %s", rout); |
| 68 |
+ |
error(SYSTEM, errmsg); |
| 69 |
+ |
} |
| 70 |
+ |
} |
| 71 |
+ |
return(newp); |
| 72 |
+ |
} |
| 73 |
+ |
|
| 74 |
+ |
|
| 75 |
|
hdattach(fd) /* start tracking file fragments for some section */ |
| 76 |
|
register int fd; |
| 77 |
|
{ |
| 78 |
|
if (fd >= nhdfragls) { |
| 79 |
< |
if (nhdfragls) |
| 80 |
< |
hdfragl = (struct fraglist *)realloc((char *)hdfragl, |
| 57 |
< |
(fd+1)*sizeof(struct fraglist)); |
| 58 |
< |
else |
| 59 |
< |
hdfragl = (struct fraglist *)malloc( |
| 60 |
< |
(fd+1)*sizeof(struct fraglist)); |
| 61 |
< |
if (hdfragl == NULL) |
| 62 |
< |
error(SYSTEM, "out of memory in hdattach"); |
| 79 |
> |
hdfragl = (struct fraglist *)hdrealloc((char *)hdfragl, |
| 80 |
> |
(fd+1)*sizeof(struct fraglist), "hdattach"); |
| 81 |
|
bzero((char *)(hdfragl+nhdfragls), |
| 82 |
|
(fd+1-nhdfragls)*sizeof(struct fraglist)); |
| 83 |
|
nhdfragls = fd+1; |
| 103 |
|
} |
| 104 |
|
|
| 105 |
|
|
| 88 |
– |
markdirty(hp) /* mark holodeck section directory dirty */ |
| 89 |
– |
register HOLO *hp; |
| 90 |
– |
{ |
| 91 |
– |
static BEAMI smudge = {0, -1}; |
| 92 |
– |
|
| 93 |
– |
if (hp->dirty) /* already marked? */ |
| 94 |
– |
return; |
| 95 |
– |
hp->dirty = 1; |
| 96 |
– |
if (lseek(hp->fd, biglob(hp)->fo+(nbeams(hp)-1)*sizeof(BEAMI), 0) < 0 |
| 97 |
– |
|| write(hp->fd, (char *)&smudge, |
| 98 |
– |
sizeof(BEAMI)) != sizeof(BEAMI)) |
| 99 |
– |
error(SYSTEM, "seek/write error in markdirty"); |
| 100 |
– |
} |
| 101 |
– |
|
| 102 |
– |
|
| 106 |
|
HOLO * |
| 107 |
|
hdinit(fd, hproto) /* initialize a holodeck section in a file */ |
| 108 |
|
int fd; /* corresponding file descriptor */ |
| 129 |
|
if (read(fd, (char *)(hp->bi+1), n) != n) |
| 130 |
|
error(SYSTEM, "failure loading holodeck directory"); |
| 131 |
|
/* check that it's clean */ |
| 132 |
< |
if (hp->bi[nbeams(hp)].fo < 0) |
| 133 |
< |
error(WARNING, "dirty holodeck section"); |
| 132 |
> |
for (n = nbeams(hp); n > 0; n--) |
| 133 |
> |
if (hp->bi[n].fo < 0) { |
| 134 |
> |
hp->bi[n].fo = 0; |
| 135 |
> |
error(WARNING, "dirty holodeck section"); |
| 136 |
> |
break; |
| 137 |
> |
} |
| 138 |
|
} else { /* assume we're creating it */ |
| 139 |
|
if ((hp = hdalloc(hproto)) == NULL) |
| 140 |
|
goto memerr; |
| 155 |
|
biglob(hp)->nrd = rtrunc = 0; |
| 156 |
|
for (n = hproto == NULL ? nbeams(hp) : 0; n > 0; n--) |
| 157 |
|
if (hp->bi[n].nrd) |
| 158 |
< |
if (hp->bi[n].fo + hp->bi[n].nrd > fpos) { |
| 158 |
> |
if (hp->bi[n].fo+hp->bi[n].nrd*sizeof(RAYVAL) > fpos) { |
| 159 |
|
rtrunc += hp->bi[n].nrd; |
| 160 |
|
hp->bi[n].nrd = 0; |
| 161 |
|
} else |
| 178 |
|
} |
| 179 |
|
|
| 180 |
|
|
| 181 |
+ |
markdirty(hp, i) /* mark holodeck directory position dirty */ |
| 182 |
+ |
register HOLO *hp; |
| 183 |
+ |
int i; |
| 184 |
+ |
{ |
| 185 |
+ |
static BEAMI smudge = {0, -1}; |
| 186 |
+ |
int mindist, minpos; |
| 187 |
+ |
register int j; |
| 188 |
+ |
|
| 189 |
+ |
if (!hp->dirty++) { /* write smudge first time */ |
| 190 |
+ |
if (lseek(hp->fd, biglob(hp)->fo+(i-1)*sizeof(BEAMI), 0) < 0 |
| 191 |
+ |
|| write(hp->fd, (char *)&smudge, |
| 192 |
+ |
sizeof(BEAMI)) != sizeof(BEAMI)) |
| 193 |
+ |
error(SYSTEM, "seek/write error in markdirty"); |
| 194 |
+ |
hp->dirseg[0].s = i; |
| 195 |
+ |
hp->dirseg[0].n = 1; |
| 196 |
+ |
return; |
| 197 |
+ |
} |
| 198 |
+ |
/* insert into segment list */ |
| 199 |
+ |
for (j = hp->dirty; j--; ) { |
| 200 |
+ |
if (!j || hp->dirseg[j-1].s < i) { |
| 201 |
+ |
hp->dirseg[j].s = i; |
| 202 |
+ |
hp->dirseg[j].n = 1; |
| 203 |
+ |
break; |
| 204 |
+ |
} |
| 205 |
+ |
copystruct(hp->dirseg+j, hp->dirseg+(j-1)); |
| 206 |
+ |
} |
| 207 |
+ |
mindist = nbeams(hp); /* find closest neighbors */ |
| 208 |
+ |
for (j = hp->dirty; --j; ) |
| 209 |
+ |
if (hp->dirseg[j].s - (hp->dirseg[j-1].s + hp->dirseg[j-1].n) |
| 210 |
+ |
< mindist) { |
| 211 |
+ |
mindist = hp->dirseg[j].s - |
| 212 |
+ |
(hp->dirseg[j-1].s + hp->dirseg[j-1].n); |
| 213 |
+ |
minpos = j; |
| 214 |
+ |
} |
| 215 |
+ |
if (hp->dirty > MAXDIRSE || mindist <= BUFSIZ/sizeof(BEAMI)) { |
| 216 |
+ |
j = minpos - 1; /* coalesce neighbors */ |
| 217 |
+ |
if (hp->dirseg[j].s + hp->dirseg[j].n < |
| 218 |
+ |
hp->dirseg[minpos].s + hp->dirseg[minpos].n) { |
| 219 |
+ |
hp->dirseg[j].n = hp->dirseg[minpos].s + |
| 220 |
+ |
hp->dirseg[minpos].n - hp->dirseg[j].s; |
| 221 |
+ |
} |
| 222 |
+ |
hp->dirty--; /* close the gap */ |
| 223 |
+ |
for (j = minpos; j < hp->dirty; j++) |
| 224 |
+ |
copystruct(hp->dirseg+j, hp->dirseg+(j+1)); |
| 225 |
+ |
} |
| 226 |
+ |
} |
| 227 |
+ |
|
| 228 |
+ |
|
| 229 |
|
int |
| 230 |
|
hdsync(hp, all) /* update beams and directory on disk */ |
| 231 |
|
register HOLO *hp; |
| 245 |
|
hdsyncbeam(hp, j); |
| 246 |
|
if (!hp->dirty) /* directory clean? */ |
| 247 |
|
return(0); |
| 248 |
< |
errno = 0; |
| 249 |
< |
if (lseek(hp->fd, biglob(hp)->fo, 0) < 0) |
| 250 |
< |
error(SYSTEM, "cannot seek on holodeck file"); |
| 251 |
< |
n = nbeams(hp)*sizeof(BEAMI); |
| 252 |
< |
if (write(hp->fd, (char *)(hp->bi+1), n) != n) |
| 253 |
< |
error(SYSTEM, "cannot update holodeck section directory"); |
| 254 |
< |
hp->dirty = 0; |
| 248 |
> |
errno = 0; /* write dirty segments */ |
| 249 |
> |
for (j = 0; j < hp->dirty; j++) { |
| 250 |
> |
if (lseek(hp->fd, biglob(hp)->fo + |
| 251 |
> |
(hp->dirseg[j].s-1)*sizeof(BEAMI), 0) < 0) |
| 252 |
> |
error(SYSTEM, "cannot seek on holodeck file"); |
| 253 |
> |
n = hp->dirseg[j].n * sizeof(BEAMI); |
| 254 |
> |
if (write(hp->fd, (char *)(hp->bi+hp->dirseg[j].s), n) != n) |
| 255 |
> |
error(SYSTEM, "cannot update section directory"); |
| 256 |
> |
} |
| 257 |
> |
hp->dirty = 0; /* all clean */ |
| 258 |
|
return(1); |
| 259 |
|
} |
| 260 |
|
|
| 350 |
|
hp->bl[i]->tick = hdclock; /* preempt swap */ |
| 351 |
|
if (hdcachesize > 0 && hdmemuse(0) >= hdcachesize) |
| 352 |
|
hdfreecache(PCTFREE, NULL); /* free some space */ |
| 295 |
– |
errno = 0; |
| 353 |
|
if (hp->bl[i] == NULL) { /* allocate (and load) */ |
| 354 |
|
n = hp->bi[i].nrd + nr; |
| 355 |
< |
if ((hp->bl[i] = (BEAM *)malloc(hdbsiz(n))) == NULL) |
| 299 |
< |
goto memerr; |
| 355 |
> |
hp->bl[i] = (BEAM *)hdrealloc(NULL, hdbsiz(n), "hdnewrays"); |
| 356 |
|
blglob(hp)->nrm += n; |
| 357 |
|
if (n = hp->bl[i]->nrm = hp->bi[i].nrd) { |
| 358 |
+ |
errno = 0; |
| 359 |
|
if (lseek(hp->fd, hp->bi[i].fo, 0) < 0) |
| 360 |
|
error(SYSTEM, "seek error on holodeck file"); |
| 361 |
|
n *= sizeof(RAYVAL); |
| 364 |
|
"error reading beam from holodeck file"); |
| 365 |
|
} |
| 366 |
|
} else { /* just grow in memory */ |
| 367 |
< |
hp->bl[i] = (BEAM *)realloc( (char *)hp->bl[i], |
| 368 |
< |
hdbsiz(hp->bl[i]->nrm + nr) ); |
| 312 |
< |
if (hp->bl[i] == NULL) |
| 313 |
< |
goto memerr; |
| 367 |
> |
hp->bl[i] = (BEAM *)hdrealloc((char *)hp->bl[i], |
| 368 |
> |
hdbsiz(hp->bl[i]->nrm + nr), "hdnewrays"); |
| 369 |
|
blglob(hp)->nrm += nr; |
| 370 |
|
} |
| 371 |
|
p = hdbray(hp->bl[i]) + hp->bl[i]->nrm; |
| 373 |
|
bzero((char *)p, nr*sizeof(RAYVAL)); |
| 374 |
|
blglob(hp)->tick = hp->bl[i]->tick = hdclock++; /* update LRU clock */ |
| 375 |
|
return(p); /* point to new rays */ |
| 321 |
– |
memerr: |
| 322 |
– |
error(SYSTEM, "out of memory in hdnewrays"); |
| 376 |
|
} |
| 377 |
|
|
| 378 |
|
|
| 390 |
|
return(NULL); |
| 391 |
|
if (hdcachesize > 0 && hdmemuse(0) >= hdcachesize) |
| 392 |
|
hdfreecache(PCTFREE, NULL); /* get free space */ |
| 393 |
< |
errno = 0; |
| 341 |
< |
if ((hp->bl[i] = (BEAM *)malloc(hdbsiz(n))) == NULL) |
| 342 |
< |
error(SYSTEM, "cannot allocate memory for beam"); |
| 393 |
> |
hp->bl[i] = (BEAM *)hdrealloc(NULL, hdbsiz(n), "hdgetbeam"); |
| 394 |
|
blglob(hp)->nrm += hp->bl[i]->nrm = n; |
| 395 |
+ |
errno = 0; |
| 396 |
|
if (lseek(hp->fd, hp->bi[i].fo, 0) < 0) |
| 397 |
|
error(SYSTEM, "seek error on holodeck file"); |
| 398 |
|
n *= sizeof(RAYVAL); |
| 499 |
|
f->nfrags--; |
| 500 |
|
#endif |
| 501 |
|
if (j % FRAGBLK == 0) { /* more free list space */ |
| 502 |
+ |
register BEAMI *newp; |
| 503 |
|
if (f->fi == NULL) |
| 504 |
< |
f->fi = (BEAMI *)malloc(FRAGBLK*sizeof(BEAMI)); |
| 504 |
> |
newp = (BEAMI *)malloc((j+FRAGBLK)*sizeof(BEAMI)); |
| 505 |
|
else |
| 506 |
< |
f->fi = (BEAMI *)realloc((char *)f->fi, |
| 506 |
> |
newp = (BEAMI *)realloc((char *)f->fi, |
| 507 |
|
(j+FRAGBLK)*sizeof(BEAMI)); |
| 508 |
< |
if (f->fi == NULL) |
| 509 |
< |
error(SYSTEM, "out of memory in hdfreefrag"); |
| 508 |
> |
if (newp == NULL) { |
| 509 |
> |
f->nfrags--; /* graceful failure */ |
| 510 |
> |
return; |
| 511 |
> |
} |
| 512 |
> |
f->fi = newp; |
| 513 |
|
} |
| 514 |
|
for ( ; ; j--) { /* insert in descending list */ |
| 515 |
|
if (!j || bi->fo < f->fi[j-1].fo) { |
| 607 |
|
hp->bi[i].fo = 0L; |
| 608 |
|
biglob(hp)->nrd += nrays - hp->bi[i].nrd; |
| 609 |
|
hp->bi[i].nrd = nrays; |
| 610 |
< |
markdirty(hp); /* section directory now out of date */ |
| 610 |
> |
markdirty(hp, i); /* section directory now out of date */ |
| 611 |
|
return(1); |
| 612 |
|
} |
| 613 |
|
|
| 783 |
|
return; |
| 784 |
|
} |
| 785 |
|
/* flush all data and free memory */ |
| 786 |
< |
hdflush(hp); |
| 786 |
> |
hdfreebeam(hp, 0); |
| 787 |
> |
hdsync(hp, 0); |
| 788 |
|
/* release fragment resources */ |
| 789 |
|
hdrelease(hp->fd); |
| 790 |
|
/* remove hp from active list */ |