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#include <string.h> |
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#include "platform.h" |
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#include "rtprocess.h" |
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#include "holo.h" |
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#ifndef CACHESIZE |
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#ifdef SMLMEM |
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#define CACHESIZE 5 |
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#define CACHESIZE 10 |
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#else |
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#define CACHESIZE 17 /* default cache size (Mbytes, 0==inf) */ |
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#define CACHESIZE 100 /* default cache size (Mbytes, 0==inf) */ |
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#endif |
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#endif |
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#ifndef FREEBEAMS |
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#define PCTFREE 15 /* maximum fraction to free (%) */ |
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#endif |
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#ifndef MAXFRAGB |
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#define MAXFRAGB 16 /* fragment blocks/file to track (0==inf) */ |
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#define MAXFRAGB 64 /* fragment blocks/file to track (0==inf) */ |
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#endif |
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#ifndef FF_DEFAULT |
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/* when to free a beam fragment */ |
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|
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static int nhdfragls; /* size of hdfragl array */ |
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|
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static HOLO *hdalloc(HDGRID *hproto); |
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static char *hdrealloc(char *ptr, unsigned siz, char *rout); |
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static void hdattach(int fd, int wr); |
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static void hdrelease(int fd); |
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static void hdmarkdirty(HOLO *hp, int i); |
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static unsigned int hdmemuse(int all); |
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static int hdfilord(const void *hb1, const void *hb2); |
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static off_t hdallocfrag(int fd, uint32 nrays); |
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static int hdsyncbeam(HOLO *hp, int i); |
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static int hdlrulist(HDBEAMI *hb, int nents, int n, HOLO *hp); |
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static int hdfreecache(int pct, HOLO *honly); |
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HOLO * |
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hdalloc(hproto) /* allocate and set holodeck section based on grid */ |
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HDGRID *hproto; |
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hdalloc( /* allocate and set holodeck section based on grid */ |
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HDGRID *hproto |
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) |
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{ |
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HOLO hdhead; |
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register HOLO *hp; |
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char * |
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hdrealloc(ptr, siz, rout) /* (re)allocate memory, retry then error */ |
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char *ptr; |
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unsigned siz; |
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char *rout; |
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hdrealloc( /* (re)allocate memory, retry then error */ |
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char *ptr, |
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unsigned siz, |
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char *rout |
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) |
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{ |
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register char *newp; |
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/* call malloc/realloc */ |
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} |
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hdattach(fd, wr) /* start tracking file fragments for some section */ |
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register int fd; |
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int wr; |
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void |
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hdattach( /* start tracking file fragments for some section */ |
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register int fd, |
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int wr |
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) |
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{ |
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if (fd >= nhdfragls) { |
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hdfragl = (struct fraglist *)hdrealloc((char *)hdfragl, |
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} |
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hdfragl[fd].nlinks++; |
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hdfragl[fd].writable = wr; /* set writable flag */ |
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hdfragl[fd].flen = lseek(fd, (off_t)0, 2); /* get file length */ |
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/* get file length */ |
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hdfragl[fd].flen = lseek(fd, (off_t)0, SEEK_END); |
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} |
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/* Do we need a routine to locate file fragments given known occupants? */ |
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hdrelease(fd) /* stop tracking file fragments for some section */ |
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register int fd; |
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void |
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hdrelease( /* stop tracking file fragments for some section */ |
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register int fd |
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) |
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{ |
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if (fd < 0 | fd >= nhdfragls || !hdfragl[fd].nlinks) |
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if ((fd < 0) | (fd >= nhdfragls) || !hdfragl[fd].nlinks) |
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return; |
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if (!--hdfragl[fd].nlinks && hdfragl[fd].nfrags) { |
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free((void *)hdfragl[fd].fi); |
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} |
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HOLO * |
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hdinit(fd, hproto) /* initialize a holodeck section in a file */ |
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int fd; /* corresponding file descriptor */ |
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HDGRID *hproto; /* holodeck section grid */ |
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extern HOLO * |
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hdinit( /* initialize a holodeck section in a file */ |
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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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{ |
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off_t rtrunc; |
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off_t fpos; |
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register int n; |
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/* prepare for system errors */ |
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errno = 0; |
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if ((fpos = lseek(fd, (off_t)0, 1)) < 0) |
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if ((fpos = lseek(fd, (off_t)0, SEEK_CUR)) < 0) |
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error(SYSTEM, "cannot determine holodeck file position"); |
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if (hproto == NULL) { /* assume we're loading it */ |
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HDGRID hpr; |
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if (fd < nhdfragls && hdfragl[fd].nlinks) |
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writable = hdfragl[fd].writable; |
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else |
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writable = lseek(fd, fpos, 0) == fpos && |
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writable = lseek(fd, fpos, SEEK_SET) == fpos && |
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write(fd, (char *)hp, sizeof(HDGRID)) == |
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sizeof(HDGRID); |
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} else { /* else assume we're creating it */ |
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fpos = hdfilen(fd); |
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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].nrd) { |
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if (hp->bi[n].fo+hp->bi[n].nrd*sizeof(RAYVAL) > 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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} |
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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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return(hp); |
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memerr: |
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error(SYSTEM, "cannot allocate holodeck grid"); |
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return NULL; /* pro forma return */ |
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} |
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|
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hdmarkdirty(hp, i) /* mark holodeck directory position dirty */ |
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register HOLO *hp; |
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int i; |
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void |
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hdmarkdirty( /* mark holodeck directory position dirty */ |
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register HOLO *hp, |
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int i |
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) |
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{ |
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static BEAMI smudge = {0, -1}; |
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int mindist, minpos; |
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register int j; |
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|
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if (!hp->dirty++) { /* write smudge first time */ |
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if (lseek(hp->fd, biglob(hp)->fo+(i-1)*sizeof(BEAMI), 0) < 0 |
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|| write(hp->fd, (char *)&smudge, |
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> |
if (lseek(hp->fd, biglob(hp)->fo+(i-1)*sizeof(BEAMI), |
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> |
SEEK_SET) < 0 || |
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> |
write(hp->fd, (char *)&smudge, |
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sizeof(BEAMI)) != sizeof(BEAMI)) |
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error(SYSTEM, "seek/write error in hdmarkdirty"); |
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hp->dirseg[0].s = i; |
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} |
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|
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int |
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< |
hdsync(hp, all) /* update beams and directory on disk */ |
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register HOLO *hp; |
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< |
int all; |
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> |
extern int |
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> |
hdsync( /* update beams and directory on disk */ |
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> |
register HOLO *hp, |
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> |
int all |
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) |
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{ |
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register int j, n; |
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errno = 0; /* write dirty segments */ |
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for (j = 0; j < hp->dirty; j++) { |
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if (lseek(hp->fd, biglob(hp)->fo + |
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< |
(hp->dirseg[j].s-1)*sizeof(BEAMI), 0) < 0) |
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> |
(hp->dirseg[j].s-1)*sizeof(BEAMI), SEEK_SET) < 0) |
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error(SYSTEM, "cannot seek on holodeck file"); |
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n = hp->dirseg[j].n * sizeof(BEAMI); |
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if (write(hp->fd, (char *)(hp->bi+hp->dirseg[j].s), n) != n) |
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} |
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unsigned |
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hdmemuse(all) /* return memory usage (in bytes) */ |
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int all; /* include overhead (painful) */ |
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unsigned int |
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hdmemuse( /* return memory usage (in bytes) */ |
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> |
int all /* include overhead (painful) */ |
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) |
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{ |
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long total = 0; |
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register int i, j; |
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} |
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off_t |
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hdfilen(fd) /* return file length for fd */ |
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< |
int fd; |
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> |
extern off_t |
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> |
hdfilen( /* return file length for fd */ |
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> |
int fd |
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> |
) |
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{ |
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off_t fpos, flen; |
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|
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if (fd < 0) |
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return(-1); |
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if (fd >= nhdfragls || !hdfragl[fd].nlinks) { |
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< |
if ((fpos = lseek(fd, (off_t)0, 1)) < 0) |
394 |
> |
if ((fpos = lseek(fd, (off_t)0, SEEK_CUR)) < 0) |
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return(-1); |
396 |
< |
flen = lseek(fd, (off_t)0, 2); |
397 |
< |
lseek(fd, fpos, 0); |
396 |
> |
flen = lseek(fd, (off_t)0, SEEK_END); |
397 |
> |
lseek(fd, fpos, SEEK_SET); |
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return(flen); |
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} |
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return(hdfragl[fd].flen); |
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} |
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|
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|
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< |
off_t |
405 |
< |
hdfiluse(fd, all) /* compute file usage (in bytes) */ |
406 |
< |
int fd; /* open file descriptor to check */ |
407 |
< |
int all; /* include overhead and unflushed data */ |
404 |
> |
extern off_t |
405 |
> |
hdfiluse( /* compute file usage (in bytes) */ |
406 |
> |
int fd /* open file descriptor to check */ |
407 |
> |
) |
408 |
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{ |
409 |
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off_t total = 0; |
410 |
< |
register int i, j; |
410 |
> |
register int j; |
411 |
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|
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for (j = 0; hdlist[j] != NULL; j++) { |
413 |
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if (hdlist[j]->fd != fd) |
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continue; |
415 |
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total += biglob(hdlist[j])->nrd * sizeof(RAYVAL); |
416 |
< |
if (all) { |
417 |
< |
for (i = nbeams(hdlist[j]); i > 0; i--) |
418 |
< |
if (hdlist[j]->bl[i] != NULL) |
419 |
< |
total += sizeof(RAYVAL) * |
416 |
> |
total += nbeams(hdlist[j])*sizeof(BEAMI) + sizeof(HDGRID); |
417 |
> |
#if 0 |
418 |
> |
for (i = nbeams(hdlist[j]); i > 0; i--) |
419 |
> |
if (hdlist[j]->bl[i] != NULL) |
420 |
> |
total += sizeof(RAYVAL) * |
421 |
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(hdlist[j]->bl[i]->nrm - |
422 |
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hdlist[j]->bi[i].nrd); |
423 |
< |
total += sizeof(HDGRID) + |
391 |
< |
nbeams(hdlist[j])*sizeof(BEAMI); |
392 |
< |
} |
423 |
> |
#endif |
424 |
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} |
425 |
< |
return(total); /* does not include fragments */ |
425 |
> |
return(total); /* doesn't include fragments, unflushed rays */ |
426 |
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} |
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|
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|
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< |
RAYVAL * |
430 |
< |
hdnewrays(hp, i, nr) /* allocate space for add'l rays and return pointer */ |
431 |
< |
register HOLO *hp; |
432 |
< |
register int i; |
433 |
< |
int nr; /* number of new rays desired */ |
429 |
> |
extern RAYVAL * |
430 |
> |
hdnewrays( /* allocate space for add'l rays and return pointer */ |
431 |
> |
register HOLO *hp, |
432 |
> |
register int i, |
433 |
> |
int nr /* number of new rays desired */ |
434 |
> |
) |
435 |
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{ |
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RAYVAL *p; |
437 |
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int n; |
438 |
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|
439 |
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if (nr <= 0) return(NULL); |
440 |
< |
CHECK(i < 1 | i > nbeams(hp), |
440 |
> |
CHECK((i < 1) | (i > nbeams(hp)), |
441 |
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CONSISTENCY, "bad beam index given to hdnewrays"); |
442 |
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if (hp->bl[i] != NULL) |
443 |
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hp->bl[i]->tick = hdclock; /* preempt swap */ |
449 |
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blglob(hp)->nrm += n; |
450 |
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if ((n = hp->bl[i]->nrm = hp->bi[i].nrd)) { |
451 |
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errno = 0; |
452 |
< |
if (lseek(hp->fd, hp->bi[i].fo, 0) < 0) |
452 |
> |
if (lseek(hp->fd, hp->bi[i].fo, SEEK_SET) < 0) |
453 |
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error(SYSTEM, "seek error on holodeck file"); |
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n *= sizeof(RAYVAL); |
455 |
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if (read(hp->fd, (char *)hdbray(hp->bl[i]), n) != n) |
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} |
472 |
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|
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|
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< |
BEAM * |
475 |
< |
hdgetbeam(hp, i) /* get beam (from file if necessary) */ |
476 |
< |
register HOLO *hp; |
477 |
< |
register int i; |
474 |
> |
extern BEAM * |
475 |
> |
hdgetbeam( /* get beam (from file if necessary) */ |
476 |
> |
register HOLO *hp, |
477 |
> |
register int i |
478 |
> |
) |
479 |
|
{ |
480 |
|
register int n; |
481 |
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|
482 |
< |
CHECK(i < 1 | i > nbeams(hp), |
482 |
> |
CHECK((i < 1) | (i > nbeams(hp)), |
483 |
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CONSISTENCY, "bad beam index given to hdgetbeam"); |
484 |
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if (hp->bl[i] == NULL) { /* load from disk */ |
485 |
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if (!(n = hp->bi[i].nrd)) |
489 |
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hp->bl[i] = (BEAM *)hdrealloc(NULL, hdbsiz(n), "hdgetbeam"); |
490 |
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blglob(hp)->nrm += hp->bl[i]->nrm = n; |
491 |
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errno = 0; |
492 |
< |
if (lseek(hp->fd, hp->bi[i].fo, 0) < 0) |
492 |
> |
if (lseek(hp->fd, hp->bi[i].fo, SEEK_SET) < 0) |
493 |
|
error(SYSTEM, "seek error on holodeck file"); |
494 |
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n *= sizeof(RAYVAL); |
495 |
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if (read(hp->fd, (char *)hdbray(hp->bl[i]), n) != n) |
503 |
|
|
504 |
|
|
505 |
|
int |
506 |
< |
hdfilord(hb1, hb2) /* order beams for quick loading */ |
507 |
< |
register HDBEAMI *hb1, *hb2; |
506 |
> |
hdfilord( /* order beams for quick loading */ |
507 |
> |
register const void *hb1, |
508 |
> |
register const void *hb2 |
509 |
> |
) |
510 |
|
{ |
511 |
|
register off_t c; |
512 |
|
/* residents go first */ |
513 |
< |
if (hb2->h->bl[hb2->b] != NULL) |
514 |
< |
return(hb1->h->bl[hb1->b] == NULL); |
515 |
< |
if (hb1->h->bl[hb1->b] != NULL) |
513 |
> |
if (((HDBEAMI*)hb2)->h->bl[((HDBEAMI*)hb2)->b] != NULL) |
514 |
> |
return(((HDBEAMI*)hb1)->h->bl[((HDBEAMI*)hb1)->b] == NULL); |
515 |
> |
if (((HDBEAMI*)hb1)->h->bl[((HDBEAMI*)hb1)->b] != NULL) |
516 |
|
return(-1); |
517 |
|
/* otherwise sort by file descriptor */ |
518 |
< |
if (hb1->h->fd != hb2->h->fd) |
519 |
< |
return(hb1->h->fd - hb2->h->fd); |
518 |
> |
if (((HDBEAMI*)hb1)->h->fd != ((HDBEAMI*)hb2)->h->fd) |
519 |
> |
return(((HDBEAMI*)hb1)->h->fd - ((HDBEAMI*)hb2)->h->fd); |
520 |
|
/* then by position in file */ |
521 |
< |
c = hb1->h->bi[hb1->b].fo - hb2->h->bi[hb2->b].fo; |
521 |
> |
c = ((HDBEAMI*)hb1)->h->bi[((HDBEAMI*)hb1)->b].fo |
522 |
> |
- ((HDBEAMI*)hb2)->h->bi[((HDBEAMI*)hb2)->b].fo; |
523 |
|
return(c > 0 ? 1 : c < 0 ? -1 : 0); |
524 |
|
} |
525 |
|
|
526 |
|
|
527 |
< |
hdloadbeams(hb, n, bf) /* load a list of beams in optimal order */ |
528 |
< |
register HDBEAMI *hb; /* list gets sorted by hdfilord() */ |
529 |
< |
int n; /* list length */ |
530 |
< |
void (*bf)(); /* callback function (optional) */ |
527 |
> |
extern void |
528 |
> |
hdloadbeams( /* load a list of beams in optimal order */ |
529 |
> |
register HDBEAMI *hb, /* list gets sorted by hdfilord() */ |
530 |
> |
int n, /* list length */ |
531 |
> |
void (*bf)(BEAM *bp, HDBEAMI *hb) /* callback function (optional) */ |
532 |
> |
) |
533 |
|
{ |
534 |
|
unsigned origcachesize, memuse; |
535 |
|
int bytesloaded, needbytes, bytes2free; |
538 |
|
/* precheck consistency */ |
539 |
|
if (n <= 0) return; |
540 |
|
for (i = n; i--; ) |
541 |
< |
if (hb[i].h==NULL || hb[i].b<1 | hb[i].b>nbeams(hb[i].h)) |
541 |
> |
if (hb[i].h==NULL || (hb[i].b<1) | (hb[i].b>nbeams(hb[i].h))) |
542 |
|
error(CONSISTENCY, "bad beam in hdloadbeams"); |
543 |
|
/* sort list for optimal access */ |
544 |
|
qsort((void *)hb, n, sizeof(HDBEAMI), hdfilord); |
571 |
|
} |
572 |
|
|
573 |
|
|
574 |
< |
int |
575 |
< |
hdfreefrag(hp, i) /* free a file fragment */ |
576 |
< |
HOLO *hp; |
577 |
< |
int i; |
574 |
> |
extern int |
575 |
> |
hdfreefrag( /* free a file fragment */ |
576 |
> |
HOLO *hp, |
577 |
> |
int i |
578 |
> |
) |
579 |
|
{ |
580 |
|
register BEAMI *bi = &hp->bi[i]; |
581 |
|
register struct fraglist *f; |
651 |
|
} |
652 |
|
|
653 |
|
|
654 |
< |
int |
655 |
< |
hdfragOK(fd, listlen, listsiz) /* get fragment list status for file */ |
656 |
< |
int fd; |
657 |
< |
int *listlen; |
658 |
< |
register int32 *listsiz; |
654 |
> |
extern int |
655 |
> |
hdfragOK( /* get fragment list status for file */ |
656 |
> |
int fd, |
657 |
> |
int *listlen, |
658 |
> |
register int32 *listsiz |
659 |
> |
) |
660 |
|
{ |
661 |
|
register struct fraglist *f; |
662 |
|
register int i; |
663 |
|
|
664 |
< |
if (fd < 0 | fd >= nhdfragls || !(f = &hdfragl[fd])->nlinks) |
664 |
> |
if ((fd < 0) | (fd >= nhdfragls) || !(f = &hdfragl[fd])->nlinks) |
665 |
|
return(0); /* listless */ |
666 |
|
if (listlen != NULL) |
667 |
|
*listlen = f->nfrags; |
677 |
|
|
678 |
|
|
679 |
|
off_t |
680 |
< |
hdallocfrag(fd, nrays) /* allocate a file fragment */ |
681 |
< |
int fd; |
682 |
< |
uint32 nrays; |
680 |
> |
hdallocfrag( /* allocate a file fragment */ |
681 |
> |
int fd, |
682 |
> |
uint32 nrays |
683 |
> |
) |
684 |
|
{ |
685 |
|
register struct fraglist *f; |
686 |
|
register int j; |
707 |
|
|
708 |
|
|
709 |
|
int |
710 |
< |
hdsyncbeam(hp, i) /* sync beam in memory with beam on disk */ |
711 |
< |
register HOLO *hp; |
712 |
< |
register int i; |
710 |
> |
hdsyncbeam( /* sync beam in memory with beam on disk */ |
711 |
> |
register HOLO *hp, |
712 |
> |
register int i |
713 |
> |
) |
714 |
|
{ |
715 |
|
int fragfreed; |
716 |
|
uint32 nrays; |
729 |
|
if (nrays) { /* get and write new fragment */ |
730 |
|
nfo = hdallocfrag(hp->fd, nrays); |
731 |
|
errno = 0; |
732 |
< |
if (lseek(hp->fd, nfo, 0) < 0) |
732 |
> |
if (lseek(hp->fd, nfo, SEEK_SET) < 0) |
733 |
|
error(SYSTEM, "cannot seek on holodeck file"); |
734 |
|
n = hp->bl[i]->nrm * sizeof(RAYVAL); |
735 |
|
if (write(hp->fd, (char *)hdbray(hp->bl[i]), n) != n) { |
748 |
|
} |
749 |
|
|
750 |
|
|
751 |
< |
int |
752 |
< |
hdfreebeam(hp, i) /* free beam, writing if dirty */ |
753 |
< |
register HOLO *hp; |
754 |
< |
register int i; |
751 |
> |
extern int |
752 |
> |
hdfreebeam( /* free beam, writing if dirty */ |
753 |
> |
register HOLO *hp, |
754 |
> |
register int i |
755 |
> |
) |
756 |
|
{ |
757 |
|
int nchanged; |
758 |
|
|
790 |
|
} |
791 |
|
|
792 |
|
|
793 |
< |
int |
794 |
< |
hdkillbeam(hp, i) /* delete beam from holodeck */ |
795 |
< |
register HOLO *hp; |
796 |
< |
register int i; |
793 |
> |
extern int |
794 |
> |
hdkillbeam( /* delete beam from holodeck */ |
795 |
> |
register HOLO *hp, |
796 |
> |
register int i |
797 |
> |
) |
798 |
|
{ |
799 |
|
int nchanged; |
800 |
|
|
805 |
|
return(nchanged); |
806 |
|
} |
807 |
|
if (i == 0) { /* clobber entire holodeck */ |
808 |
< |
if (biglob(hp)->nrd == 0 & blglob(hp)->nrm == 0) |
808 |
> |
if ((biglob(hp)->nrd == 0) & (blglob(hp)->nrm == 0)) |
809 |
|
return(0); /* already empty */ |
810 |
|
nchanged = 0; |
811 |
|
nchanged = 0; |
837 |
|
|
838 |
|
|
839 |
|
int |
840 |
< |
hdlrulist(hb, nents, n, hp) /* add beams from holodeck to LRU list */ |
841 |
< |
register HDBEAMI *hb; /* beam list */ |
842 |
< |
int nents; /* current list length */ |
843 |
< |
int n; /* maximum list length */ |
844 |
< |
register HOLO *hp; /* section we're adding from */ |
840 |
> |
hdlrulist( /* add beams from holodeck to LRU list */ |
841 |
> |
register HDBEAMI *hb, /* beam list */ |
842 |
> |
int nents, /* current list length */ |
843 |
> |
int n, /* maximum list length */ |
844 |
> |
register HOLO *hp /* section we're adding from */ |
845 |
> |
) |
846 |
|
{ |
847 |
|
register int i, j; |
848 |
|
/* insert each beam from hp */ |
870 |
|
|
871 |
|
|
872 |
|
int |
873 |
< |
hdfreecache(pct, honly) /* free up cache space, writing changes */ |
874 |
< |
int pct; /* maximum percentage to free */ |
875 |
< |
register HOLO *honly; /* NULL means check all */ |
873 |
> |
hdfreecache( /* free up cache space, writing changes */ |
874 |
> |
int pct, /* maximum percentage to free */ |
875 |
> |
register HOLO *honly /* NULL means check all */ |
876 |
> |
) |
877 |
|
{ |
878 |
|
HDBEAMI hb[FREEBEAMS]; |
879 |
|
int freetarget; |
914 |
|
} |
915 |
|
|
916 |
|
|
917 |
< |
hddone(hp) /* clean up holodeck section and free */ |
918 |
< |
register HOLO *hp; /* NULL means clean up all */ |
917 |
> |
extern void |
918 |
> |
hddone( /* clean up holodeck section and free */ |
919 |
> |
register HOLO *hp /* NULL means clean up all */ |
920 |
> |
) |
921 |
|
{ |
922 |
|
register int i; |
923 |
|
|