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/* Copyright (c) 1997 Silicon Graphics, Inc. */ |
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/* Copyright (c) 1998 Silicon Graphics, Inc. */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ SGI"; |
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#define CACHESIZE 16 /* default cache size (Mbytes, 0==inf) */ |
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#endif |
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#ifndef FREEBEAMS |
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#define FREEBEAMS 512 /* maximum beams to free at a time */ |
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#define FREEBEAMS 1500 /* maximum beams to free at a time */ |
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#endif |
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#ifndef PCTFREE |
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#define PCTFREE 20 /* maximum fraction to free (%) */ |
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#define PCTFREE 15 /* maximum fraction to free (%) */ |
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#endif |
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#ifndef MAXFRAG |
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#define MAXFRAG 32767 /* maximum fragments/file to track (0==inf) */ |
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int fd; /* corresponding file descriptor */ |
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HDGRID *hproto; /* holodeck section grid */ |
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{ |
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long rtrunc; |
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long fpos; |
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register HOLO *hp; |
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register int n; |
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error(SYSTEM, "failure loading holodeck directory"); |
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/* check that it's clean */ |
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if (hp->bi[nbeams(hp)].fo < 0) |
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error(USER, "dirty holodeck section"); |
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error(WARNING, "dirty holodeck section"); |
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} else { /* assume we're creating it */ |
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if ((hp = hdalloc(hproto)) == NULL) |
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goto memerr; |
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hdattach(fd); |
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/* check rays on disk */ |
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fpos = hdfilen(fd); |
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biglob(hp)->nrd = 0; |
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biglob(hp)->nrd = rtrunc = 0; |
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for (n = hproto == NULL ? nbeams(hp) : 0; n > 0; n--) |
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if (hp->bi[n].nrd) |
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if (hp->bi[n].fo + hp->bi[n].nrd > fpos) |
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hp->bi[n].nrd = 0; /* off end */ |
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else |
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if (hp->bi[n].fo + hp->bi[n].nrd > fpos) { |
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rtrunc += hp->bi[n].nrd; |
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hp->bi[n].nrd = 0; |
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} else |
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biglob(hp)->nrd += hp->bi[n].nrd; |
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if (rtrunc) { |
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sprintf(errmsg, "truncated section, %ld rays lost (%.1f%%)", |
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rtrunc, 100.*rtrunc/(rtrunc+biglob(hp)->nrd)); |
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error(WARNING, errmsg); |
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} |
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/* add to holodeck list */ |
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for (n = 0; n < HDMAX; n++) |
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if (hdlist[n] == NULL) { |
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p = hdbray(hp->bl[i]) + hp->bl[i]->nrm; |
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hp->bl[i]->nrm += nr; /* update in-core structure */ |
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bzero((char *)p, nr*sizeof(RAYVAL)); |
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hp->bl[i]->tick = hdclock; /* update LRU clock */ |
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blglob(hp)->tick = hdclock++; |
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blglob(hp)->tick = hp->bl[i]->tick = hdclock++; /* update LRU clock */ |
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return(p); /* point to new rays */ |
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memerr: |
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error(SYSTEM, "out of memory in hdnewrays"); |
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if (read(hp->fd, (char *)hdbray(hp->bl[i]), n) != n) |
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error(SYSTEM, "error reading beam from holodeck file"); |
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} |
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hp->bl[i]->tick = hdclock; /* update LRU clock */ |
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blglob(hp)->tick = hdclock++; |
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blglob(hp)->tick = hp->bl[i]->tick = hdclock++; /* update LRU clock */ |
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return(hp->bl[i]); |
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} |
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int (*bf)(); /* callback function (optional) */ |
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{ |
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unsigned origcachesize, memuse; |
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register BEAM *bp; |
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int bytesloaded, needbytes, bytes2free; |
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register BEAM *bp; |
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register int i; |
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/* precheck consistency */ |
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if (n <= 0) return; |
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for (i = n; i--; ) |
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if (hb[i].h == NULL || hb[i].b < 1 | hb[i].b > nbeams(hb[i].h)) |
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error(CONSISTENCY, "bad beam in hdloadbeams"); |
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qsort((char *)hb, n, sizeof(HDBEAMI), hdfilord); |
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bytesloaded = 0; /* run through loaded beams */ |
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for ( ; n && (bp = hb->h->bl[hb->b]) != NULL; n--, hb++) { |
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bp->tick = hdclock; /* preempt swap */ |
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bp->tick = hdclock; /* preempt swap */ |
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bytesloaded += bp->nrm; |
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if (bf != NULL) |
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(*bf)(bp, hb->h, hb->b); |
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(*bf)(bp, hb); |
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} |
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bytesloaded *= sizeof(RAYVAL); |
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if ((origcachesize = hdcachesize) > 0) { |
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} |
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for (i = 0; i < n; i++) |
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if ((bp = hdgetbeam(hb[i].h, hb[i].b)) != NULL && bf != NULL) |
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(*bf)(bp, hb[i].h, hb[i].b); |
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(*bf)(bp, hb+i); |
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hdcachesize = origcachesize; /* resume dynamic swapping */ |
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} |
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{ |
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register int i, j; |
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/* insert each beam from hp */ |
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for (i = nbeams(hp); i > 0; i--) { |
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for (i = 1; i <= nbeams(hp); i++) { |
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if (hp->bl[i] == NULL) /* check if loaded */ |
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continue; |
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#if 0 |
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int freetarget; |
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int n; |
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register int i; |
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#ifdef DEBUG |
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unsigned membefore; |
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membefore = hdmemuse(0); |
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#endif |
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/* compute free target */ |
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freetarget = (honly != NULL) ? blglob(honly)->nrm : |
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hdmemuse(0)/sizeof(RAYVAL) ; |
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break; |
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} |
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hdsync(honly, 0); /* synchronize directories as necessary */ |
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#ifdef DEBUG |
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sprintf(errmsg, |
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"%dK before, %dK after hdfreecache (%dK total), %d rays short\n", |
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membefore>>10, hdmemuse(0)>>10, hdmemuse(1)>>10, freetarget); |
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wputs(errmsg); |
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#endif |
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return(-freetarget); /* return how far past goal we went */ |
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} |
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if (hp == NULL) { /* NULL means clean up everything */ |
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while (hdlist[0] != NULL) |
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hddone(hdlist[0]); |
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free((char *)hdfragl); |
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hdfragl = NULL; nhdfragls = 0; |
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return; |
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} |
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/* flush all data and free memory */ |
