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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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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* Routines for managing holodeck files |
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* |
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* 9/30/97 GWLarson |
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*/ |
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#include "copyright.h" |
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|
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#include <string.h> |
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|
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#include "platform.h" |
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#include "rtprocess.h" |
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|
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#include "holo.h" |
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|
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#ifndef CACHESIZE |
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#define CACHESIZE 16 /* default cache size (Mbytes, 0==inf) */ |
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#ifdef SMLMEM |
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#define CACHESIZE 5 |
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#else |
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#define CACHESIZE 17 /* 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 FREEBEAMS 1500 /* maximum beams to free at a time */ |
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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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#endif |
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#ifndef FF_DEFAULT |
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/* when to free a beam fragment */ |
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#define FF_DEFAULT (FF_WRITE|FF_KILL) |
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#endif |
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#ifndef MINDIRSEL |
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/* minimum directory seek length */ |
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#define MINDIRSEL (4*BUFSIZ/sizeof(BEAMI)) |
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|
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#define FRAGBLK 512 /* number of fragments to allocate at a time */ |
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|
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int hdfragflags = FF_DEFAULT; /* tells when to free fragments */ |
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unsigned hdcachesize = CACHESIZE*1024*1024; /* target cache size */ |
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unsigned long hdclock; /* clock value */ |
53 |
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unsigned long hdclock; /* clock value */ |
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|
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HOLO *hdlist[HDMAX+1]; /* holodeck pointers (NULL term.) */ |
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|
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static struct fraglist { |
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short nlinks; /* number of holodeck sections using us */ |
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short writerr; /* write error encountered */ |
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> |
short writable; /* 0 read-only, <0 write error encountered */ |
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int nfrags; /* number of known fragments */ |
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BEAMI *fi; /* fragments, descending file position */ |
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long flen; /* last known file length */ |
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off_t flen; /* last known file length */ |
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} *hdfragl; /* fragment lists, indexed by file descriptor */ |
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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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|
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|
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|
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HOLO * |
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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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int n; |
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/* copy grid to temporary header */ |
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memcpy((void *)&hdhead, (void *)hproto, sizeof(HDGRID)); |
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/* compute grid vectors and sizes */ |
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hdcompgrid(&hdhead); |
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/* allocate header with directory */ |
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n = sizeof(HOLO)+nbeams(&hdhead)*sizeof(BEAMI); |
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if ((hp = (HOLO *)malloc(n)) == NULL) |
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return(NULL); |
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/* copy header information */ |
98 |
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*hp = hdhead; |
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/* allocate and clear beam list */ |
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hp->bl = (BEAM **)malloc((nbeams(hp)+1)*sizeof(BEAM *)+sizeof(BEAM)); |
101 |
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if (hp->bl == NULL) { |
102 |
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free((void *)hp); |
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return(NULL); |
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} |
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memset((void *)hp->bl, '\0', (nbeams(hp)+1)*sizeof(BEAM *)+sizeof(BEAM)); |
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hp->bl[0] = (BEAM *)(hp->bl+nbeams(hp)+1); /* set blglob(hp) */ |
107 |
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hp->fd = -1; |
108 |
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hp->dirty = 0; |
109 |
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hp->priv = NULL; |
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/* clear beam directory */ |
111 |
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memset((void *)hp->bi, '\0', (nbeams(hp)+1)*sizeof(BEAMI)); |
112 |
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return(hp); /* all is well */ |
113 |
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} |
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|
115 |
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|
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char * |
117 |
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hdrealloc(ptr, siz, rout) /* (re)allocate memory, retry then error */ |
118 |
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char *ptr; |
119 |
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unsigned siz; |
120 |
< |
char *rout; |
117 |
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hdrealloc( /* (re)allocate memory, retry then error */ |
118 |
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char *ptr, |
119 |
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unsigned siz, |
120 |
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char *rout |
121 |
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) |
122 |
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{ |
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register char *newp; |
124 |
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/* call malloc/realloc */ |
125 |
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if (ptr == NULL) newp = (char *)malloc(siz); |
126 |
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else newp = (char *)realloc(ptr, siz); |
126 |
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else newp = (char *)realloc((void *)ptr, siz); |
127 |
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/* check success */ |
128 |
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if (newp == NULL && rout != NULL) { |
129 |
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hdfreecache(25, NULL); /* free some memory */ |
138 |
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} |
139 |
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|
140 |
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|
141 |
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hdattach(fd) /* start tracking file fragments for some section */ |
142 |
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register int fd; |
141 |
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void |
142 |
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hdattach( /* start tracking file fragments for some section */ |
143 |
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register int fd, |
144 |
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int wr |
145 |
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) |
146 |
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{ |
147 |
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if (fd >= nhdfragls) { |
148 |
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hdfragl = (struct fraglist *)hdrealloc((char *)hdfragl, |
149 |
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(fd+1)*sizeof(struct fraglist), "hdattach"); |
150 |
< |
bzero((char *)(hdfragl+nhdfragls), |
151 |
< |
(fd+1-nhdfragls)*sizeof(struct fraglist)); |
150 |
> |
memset((void *)(hdfragl+nhdfragls), |
151 |
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'\0', (fd+1-nhdfragls)*sizeof(struct fraglist)); |
152 |
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nhdfragls = fd+1; |
153 |
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} |
154 |
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hdfragl[fd].nlinks++; |
155 |
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hdfragl[fd].flen = lseek(fd, 0L, 2); /* get file length */ |
155 |
> |
hdfragl[fd].writable = wr; /* set writable flag */ |
156 |
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/* get file length */ |
157 |
> |
hdfragl[fd].flen = lseek(fd, (off_t)0, SEEK_END); |
158 |
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} |
159 |
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|
160 |
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|
161 |
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/* Do we need a routine to locate file fragments given known occupants? */ |
162 |
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|
163 |
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|
164 |
< |
hdrelease(fd) /* stop tracking file fragments for some section */ |
165 |
< |
register int fd; |
164 |
> |
void |
165 |
> |
hdrelease( /* stop tracking file fragments for some section */ |
166 |
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register int fd |
167 |
> |
) |
168 |
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{ |
169 |
< |
if (fd < 0 | fd >= nhdfragls || !hdfragl[fd].nlinks) |
169 |
> |
if ((fd < 0) | (fd >= nhdfragls) || !hdfragl[fd].nlinks) |
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return; |
171 |
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if (!--hdfragl[fd].nlinks && hdfragl[fd].nfrags) { |
172 |
< |
free((char *)hdfragl[fd].fi); |
172 |
> |
free((void *)hdfragl[fd].fi); |
173 |
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hdfragl[fd].fi = NULL; |
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hdfragl[fd].nfrags = 0; |
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} |
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} |
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|
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|
179 |
< |
HOLO * |
180 |
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hdinit(fd, hproto) /* initialize a holodeck section in a file */ |
181 |
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int fd; /* corresponding file descriptor */ |
182 |
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HDGRID *hproto; /* holodeck section grid */ |
179 |
> |
extern HOLO * |
180 |
> |
hdinit( /* initialize a holodeck section in a file */ |
181 |
> |
int fd, /* corresponding file descriptor */ |
182 |
> |
HDGRID *hproto /* holodeck section grid */ |
183 |
> |
) |
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{ |
185 |
< |
long rtrunc; |
186 |
< |
long fpos; |
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> |
off_t rtrunc; |
186 |
> |
off_t fpos; |
187 |
> |
int writable; |
188 |
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register HOLO *hp; |
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register int n; |
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/* prepare for system errors */ |
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errno = 0; |
192 |
< |
if ((fpos = lseek(fd, 0L, 1)) < 0) |
192 |
> |
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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error(WARNING, "dirty holodeck section"); |
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break; |
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} |
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< |
} else { /* assume we're creating it */ |
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> |
/* check writability */ |
214 |
> |
if (fd < nhdfragls && hdfragl[fd].nlinks) |
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> |
writable = hdfragl[fd].writable; |
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else |
217 |
> |
writable = lseek(fd, fpos, SEEK_SET) == fpos && |
218 |
> |
write(fd, (char *)hp, sizeof(HDGRID)) == |
219 |
> |
sizeof(HDGRID); |
220 |
> |
} else { /* 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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/* write header and skeleton */ |
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sizeof(HDGRID) || |
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write(fd, (char *)(hp->bi+1), n) != n) |
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error(SYSTEM, "cannot write header to holodeck file"); |
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writable = 1; |
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} |
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hp->fd = fd; |
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hp->dirty = 0; |
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biglob(hp)->fo = fpos + sizeof(HDGRID); |
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/* start tracking fragments */ |
235 |
< |
hdattach(fd); |
235 |
> |
hdattach(fd, writable); |
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/* check rays on disk */ |
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fpos = hdfilen(fd); |
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biglob(hp)->nrd = rtrunc = 0; |
239 |
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for (n = hproto == NULL ? nbeams(hp) : 0; n > 0; n--) |
240 |
< |
if (hp->bi[n].nrd) |
240 |
> |
if (hp->bi[n].nrd) { |
241 |
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if (hp->bi[n].fo+hp->bi[n].nrd*sizeof(RAYVAL) > fpos) { |
242 |
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rtrunc += hp->bi[n].nrd; |
243 |
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hp->bi[n].nrd = 0; |
244 |
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} else |
245 |
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biglob(hp)->nrd += hp->bi[n].nrd; |
246 |
+ |
} |
247 |
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if (rtrunc) { |
248 |
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sprintf(errmsg, "truncated section, %ld rays lost (%.1f%%)", |
249 |
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rtrunc, 100.*rtrunc/(rtrunc+biglob(hp)->nrd)); |
259 |
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return(hp); |
260 |
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memerr: |
261 |
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error(SYSTEM, "cannot allocate holodeck grid"); |
262 |
+ |
return NULL; /* pro forma return */ |
263 |
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} |
264 |
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|
265 |
|
|
266 |
< |
markdirty(hp, i) /* mark holodeck directory position dirty */ |
267 |
< |
register HOLO *hp; |
268 |
< |
int i; |
266 |
> |
void |
267 |
> |
hdmarkdirty( /* mark holodeck directory position dirty */ |
268 |
> |
register HOLO *hp, |
269 |
> |
int i |
270 |
> |
) |
271 |
|
{ |
272 |
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static BEAMI smudge = {0, -1}; |
273 |
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int mindist, minpos; |
274 |
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register int j; |
275 |
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|
276 |
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if (!hp->dirty++) { /* write smudge first time */ |
277 |
< |
if (lseek(hp->fd, biglob(hp)->fo+(i-1)*sizeof(BEAMI), 0) < 0 |
278 |
< |
|| write(hp->fd, (char *)&smudge, |
277 |
> |
if (lseek(hp->fd, biglob(hp)->fo+(i-1)*sizeof(BEAMI), |
278 |
> |
SEEK_SET) < 0 || |
279 |
> |
write(hp->fd, (char *)&smudge, |
280 |
|
sizeof(BEAMI)) != sizeof(BEAMI)) |
281 |
< |
error(SYSTEM, "seek/write error in markdirty"); |
281 |
> |
error(SYSTEM, "seek/write error in hdmarkdirty"); |
282 |
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hp->dirseg[0].s = i; |
283 |
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hp->dirseg[0].n = 1; |
284 |
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return; |
290 |
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hp->dirseg[j].n = 1; |
291 |
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break; |
292 |
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} |
293 |
< |
copystruct(hp->dirseg+j, hp->dirseg+(j-1)); |
293 |
> |
*(hp->dirseg+j) = *(hp->dirseg+(j-1)); |
294 |
|
} |
295 |
|
do { /* check neighbors */ |
296 |
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mindist = nbeams(hp); /* find closest */ |
312 |
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hp->dirseg[minpos].n - hp->dirseg[j].s; |
313 |
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hp->dirty--; |
314 |
|
while (++j < hp->dirty) /* close the gap */ |
315 |
< |
copystruct(hp->dirseg+j, hp->dirseg+(j+1)); |
315 |
> |
*(hp->dirseg+j) = *(hp->dirseg+(j+1)); |
316 |
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} while (mindist <= MINDIRSEL); |
317 |
|
} |
318 |
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|
319 |
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|
320 |
< |
int |
321 |
< |
hdsync(hp, all) /* update beams and directory on disk */ |
322 |
< |
register HOLO *hp; |
323 |
< |
int all; |
320 |
> |
extern int |
321 |
> |
hdsync( /* update beams and directory on disk */ |
322 |
> |
register HOLO *hp, |
323 |
> |
int all |
324 |
> |
) |
325 |
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{ |
326 |
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register int j, n; |
327 |
|
|
340 |
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errno = 0; /* write dirty segments */ |
341 |
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for (j = 0; j < hp->dirty; j++) { |
342 |
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if (lseek(hp->fd, biglob(hp)->fo + |
343 |
< |
(hp->dirseg[j].s-1)*sizeof(BEAMI), 0) < 0) |
343 |
> |
(hp->dirseg[j].s-1)*sizeof(BEAMI), SEEK_SET) < 0) |
344 |
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error(SYSTEM, "cannot seek on holodeck file"); |
345 |
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n = hp->dirseg[j].n * sizeof(BEAMI); |
346 |
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if (write(hp->fd, (char *)(hp->bi+hp->dirseg[j].s), n) != n) |
351 |
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} |
352 |
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|
353 |
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|
354 |
< |
unsigned |
355 |
< |
hdmemuse(all) /* return memory usage (in bytes) */ |
356 |
< |
int all; /* include overhead (painful) */ |
354 |
> |
unsigned int |
355 |
> |
hdmemuse( /* return memory usage (in bytes) */ |
356 |
> |
int all /* include overhead (painful) */ |
357 |
> |
) |
358 |
|
{ |
359 |
|
long total = 0; |
360 |
|
register int i, j; |
381 |
|
} |
382 |
|
|
383 |
|
|
384 |
< |
long |
385 |
< |
hdfilen(fd) /* return file length for fd */ |
386 |
< |
int fd; |
384 |
> |
extern off_t |
385 |
> |
hdfilen( /* return file length for fd */ |
386 |
> |
int fd |
387 |
> |
) |
388 |
|
{ |
389 |
< |
long fpos, flen; |
389 |
> |
off_t fpos, flen; |
390 |
|
|
391 |
|
if (fd < 0) |
392 |
|
return(-1); |
393 |
|
if (fd >= nhdfragls || !hdfragl[fd].nlinks) { |
394 |
< |
if ((fpos = lseek(fd, 0L, 1)) < 0) |
394 |
> |
if ((fpos = lseek(fd, (off_t)0, SEEK_CUR)) < 0) |
395 |
|
return(-1); |
396 |
< |
flen = lseek(fd, 0L, 2); |
397 |
< |
lseek(fd, fpos, 0); |
396 |
> |
flen = lseek(fd, (off_t)0, SEEK_END); |
397 |
> |
lseek(fd, fpos, SEEK_SET); |
398 |
|
return(flen); |
399 |
|
} |
400 |
|
return(hdfragl[fd].flen); |
401 |
|
} |
402 |
|
|
403 |
|
|
404 |
< |
long |
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 |
> |
int all /* include overhead and unflushed data */ |
408 |
> |
) |
409 |
|
{ |
410 |
< |
long total = 0; |
410 |
> |
off_t total = 0; |
411 |
|
register int i, j; |
412 |
|
|
413 |
|
for (j = 0; hdlist[j] != NULL; j++) { |
428 |
|
} |
429 |
|
|
430 |
|
|
431 |
< |
RAYVAL * |
432 |
< |
hdnewrays(hp, i, nr) /* allocate space for add'l rays and return pointer */ |
433 |
< |
register HOLO *hp; |
434 |
< |
register int i; |
435 |
< |
int nr; /* number of new rays desired */ |
431 |
> |
extern RAYVAL * |
432 |
> |
hdnewrays( /* allocate space for add'l rays and return pointer */ |
433 |
> |
register HOLO *hp, |
434 |
> |
register int i, |
435 |
> |
int nr /* number of new rays desired */ |
436 |
> |
) |
437 |
|
{ |
438 |
|
RAYVAL *p; |
439 |
|
int n; |
440 |
|
|
441 |
< |
if (nr <= 0) |
442 |
< |
return(NULL); |
443 |
< |
if (i < 1 | i > nbeams(hp)) |
355 |
< |
error(CONSISTENCY, "bad beam index given to hdnewrays"); |
441 |
> |
if (nr <= 0) return(NULL); |
442 |
> |
CHECK((i < 1) | (i > nbeams(hp)), |
443 |
> |
CONSISTENCY, "bad beam index given to hdnewrays"); |
444 |
|
if (hp->bl[i] != NULL) |
445 |
|
hp->bl[i]->tick = hdclock; /* preempt swap */ |
446 |
|
if (hdcachesize > 0 && hdmemuse(0) >= hdcachesize) |
449 |
|
n = hp->bi[i].nrd + nr; |
450 |
|
hp->bl[i] = (BEAM *)hdrealloc(NULL, hdbsiz(n), "hdnewrays"); |
451 |
|
blglob(hp)->nrm += n; |
452 |
< |
if (n = hp->bl[i]->nrm = hp->bi[i].nrd) { |
452 |
> |
if ((n = hp->bl[i]->nrm = hp->bi[i].nrd)) { |
453 |
|
errno = 0; |
454 |
< |
if (lseek(hp->fd, hp->bi[i].fo, 0) < 0) |
454 |
> |
if (lseek(hp->fd, hp->bi[i].fo, SEEK_SET) < 0) |
455 |
|
error(SYSTEM, "seek error on holodeck file"); |
456 |
|
n *= sizeof(RAYVAL); |
457 |
|
if (read(hp->fd, (char *)hdbray(hp->bl[i]), n) != n) |
463 |
|
hdbsiz(hp->bl[i]->nrm + nr), "hdnewrays"); |
464 |
|
blglob(hp)->nrm += nr; |
465 |
|
} |
466 |
+ |
if (hdfragflags&FF_ALLOC && hp->bi[i].nrd) |
467 |
+ |
hdfreefrag(hp, i); /* relinquish old fragment */ |
468 |
|
p = hdbray(hp->bl[i]) + hp->bl[i]->nrm; |
469 |
|
hp->bl[i]->nrm += nr; /* update in-core structure */ |
470 |
< |
bzero((char *)p, nr*sizeof(RAYVAL)); |
470 |
> |
memset((void *)p, '\0', nr*sizeof(RAYVAL)); |
471 |
|
blglob(hp)->tick = hp->bl[i]->tick = hdclock++; /* update LRU clock */ |
472 |
|
return(p); /* point to new rays */ |
473 |
|
} |
474 |
|
|
475 |
|
|
476 |
< |
BEAM * |
477 |
< |
hdgetbeam(hp, i) /* get beam (from file if necessary) */ |
478 |
< |
register HOLO *hp; |
479 |
< |
register int i; |
476 |
> |
extern BEAM * |
477 |
> |
hdgetbeam( /* get beam (from file if necessary) */ |
478 |
> |
register HOLO *hp, |
479 |
> |
register int i |
480 |
> |
) |
481 |
|
{ |
482 |
|
register int n; |
483 |
|
|
484 |
< |
if (i < 1 | i > nbeams(hp)) |
485 |
< |
error(CONSISTENCY, "bad beam index given to hdgetbeam"); |
484 |
> |
CHECK((i < 1) | (i > nbeams(hp)), |
485 |
> |
CONSISTENCY, "bad beam index given to hdgetbeam"); |
486 |
|
if (hp->bl[i] == NULL) { /* load from disk */ |
487 |
|
if (!(n = hp->bi[i].nrd)) |
488 |
|
return(NULL); |
491 |
|
hp->bl[i] = (BEAM *)hdrealloc(NULL, hdbsiz(n), "hdgetbeam"); |
492 |
|
blglob(hp)->nrm += hp->bl[i]->nrm = n; |
493 |
|
errno = 0; |
494 |
< |
if (lseek(hp->fd, hp->bi[i].fo, 0) < 0) |
494 |
> |
if (lseek(hp->fd, hp->bi[i].fo, SEEK_SET) < 0) |
495 |
|
error(SYSTEM, "seek error on holodeck file"); |
496 |
|
n *= sizeof(RAYVAL); |
497 |
|
if (read(hp->fd, (char *)hdbray(hp->bl[i]), n) != n) |
498 |
|
error(SYSTEM, "error reading beam from holodeck file"); |
499 |
+ |
if (hdfragflags&FF_READ) |
500 |
+ |
hdfreefrag(hp, i); /* relinquish old frag. */ |
501 |
|
} |
502 |
|
blglob(hp)->tick = hp->bl[i]->tick = hdclock++; /* update LRU clock */ |
503 |
|
return(hp->bl[i]); |
505 |
|
|
506 |
|
|
507 |
|
int |
508 |
< |
hdfilord(hb1, hb2) /* order beams for quick loading */ |
509 |
< |
register HDBEAMI *hb1, *hb2; |
508 |
> |
hdfilord( /* order beams for quick loading */ |
509 |
> |
register const void *hb1, |
510 |
> |
register const void *hb2 |
511 |
> |
) |
512 |
|
{ |
513 |
< |
register long c; |
513 |
> |
register off_t c; |
514 |
|
/* residents go first */ |
515 |
< |
if (hb2->h->bl[hb2->b] != NULL) |
516 |
< |
return(hb1->h->bl[hb1->b] == NULL); |
517 |
< |
if (hb1->h->bl[hb1->b] != NULL) |
515 |
> |
if (((HDBEAMI*)hb2)->h->bl[((HDBEAMI*)hb2)->b] != NULL) |
516 |
> |
return(((HDBEAMI*)hb1)->h->bl[((HDBEAMI*)hb1)->b] == NULL); |
517 |
> |
if (((HDBEAMI*)hb1)->h->bl[((HDBEAMI*)hb1)->b] != NULL) |
518 |
|
return(-1); |
519 |
|
/* otherwise sort by file descriptor */ |
520 |
< |
if ((c = hb1->h->fd - hb2->h->fd)) |
521 |
< |
return(c); |
520 |
> |
if (((HDBEAMI*)hb1)->h->fd != ((HDBEAMI*)hb2)->h->fd) |
521 |
> |
return(((HDBEAMI*)hb1)->h->fd - ((HDBEAMI*)hb2)->h->fd); |
522 |
|
/* then by position in file */ |
523 |
< |
c = hb1->h->bi[hb1->b].fo - hb2->h->bi[hb2->b].fo; |
523 |
> |
c = ((HDBEAMI*)hb1)->h->bi[((HDBEAMI*)hb1)->b].fo |
524 |
> |
- ((HDBEAMI*)hb2)->h->bi[((HDBEAMI*)hb2)->b].fo; |
525 |
|
return(c > 0 ? 1 : c < 0 ? -1 : 0); |
526 |
|
} |
527 |
|
|
528 |
|
|
529 |
< |
hdloadbeams(hb, n, bf) /* load a list of beams in optimal order */ |
530 |
< |
register HDBEAMI *hb; /* list gets sorted by hdfilord() */ |
531 |
< |
int n; /* list length */ |
532 |
< |
int (*bf)(); /* callback function (optional) */ |
529 |
> |
extern void |
530 |
> |
hdloadbeams( /* load a list of beams in optimal order */ |
531 |
> |
register HDBEAMI *hb, /* list gets sorted by hdfilord() */ |
532 |
> |
int n, /* list length */ |
533 |
> |
void (*bf)(BEAM *bp, HDBEAMI *hb) /* callback function (optional) */ |
534 |
> |
) |
535 |
|
{ |
536 |
|
unsigned origcachesize, memuse; |
537 |
|
int bytesloaded, needbytes, bytes2free; |
540 |
|
/* precheck consistency */ |
541 |
|
if (n <= 0) return; |
542 |
|
for (i = n; i--; ) |
543 |
< |
if (hb[i].h == NULL || hb[i].b < 1 | hb[i].b > nbeams(hb[i].h)) |
543 |
> |
if (hb[i].h==NULL || (hb[i].b<1) | (hb[i].b>nbeams(hb[i].h))) |
544 |
|
error(CONSISTENCY, "bad beam in hdloadbeams"); |
545 |
|
/* sort list for optimal access */ |
546 |
< |
qsort((char *)hb, n, sizeof(HDBEAMI), hdfilord); |
546 |
> |
qsort((void *)hb, n, sizeof(HDBEAMI), hdfilord); |
547 |
|
bytesloaded = 0; /* run through loaded beams */ |
548 |
|
for ( ; n && (bp = hb->h->bl[hb->b]) != NULL; n--, hb++) { |
549 |
|
bp->tick = hdclock; /* preempt swap */ |
573 |
|
} |
574 |
|
|
575 |
|
|
576 |
< |
hdfreefrag(fd, bi) /* free a file fragment */ |
577 |
< |
int fd; |
578 |
< |
register BEAMI *bi; |
576 |
> |
extern int |
577 |
> |
hdfreefrag( /* free a file fragment */ |
578 |
> |
HOLO *hp, |
579 |
> |
int i |
580 |
> |
) |
581 |
|
{ |
582 |
+ |
register BEAMI *bi = &hp->bi[i]; |
583 |
|
register struct fraglist *f; |
584 |
|
register int j, k; |
585 |
|
|
586 |
< |
if (bi->nrd == 0) |
587 |
< |
return; |
588 |
< |
#ifdef DEBUG |
589 |
< |
if (fd < 0 | fd >= nhdfragls || !hdfragl[fd].nlinks) |
590 |
< |
error(CONSISTENCY, "bad file descriptor in hdfreefrag"); |
591 |
< |
#endif |
592 |
< |
f = &hdfragl[fd]; |
586 |
> |
if (bi->nrd <= 0) |
587 |
> |
return(0); |
588 |
> |
DCHECK(hp->fd < 0 | hp->fd >= nhdfragls || !hdfragl[hp->fd].nlinks, |
589 |
> |
CONSISTENCY, "bad file descriptor in hdfreefrag"); |
590 |
> |
f = &hdfragl[hp->fd]; |
591 |
> |
if (!f->writable) |
592 |
> |
return(0); |
593 |
|
if (f->nfrags % FRAGBLK == 0) { /* delete empty remnants */ |
594 |
|
for (j = k = 0; k < f->nfrags; j++, k++) { |
595 |
|
while (f->fi[k].nrd == 0) |
596 |
|
if (++k >= f->nfrags) |
597 |
|
goto endloop; |
598 |
|
if (k > j) |
599 |
< |
copystruct(f->fi+j, f->fi+k); |
599 |
> |
*(f->fi+j) = *(f->fi+k); |
600 |
|
} |
601 |
|
endloop: |
602 |
|
f->nfrags = j; |
606 |
|
if (j >= MAXFRAGB*FRAGBLK) { |
607 |
|
f->nfrags = j--; /* stop list growth */ |
608 |
|
if (bi->nrd <= f->fi[j].nrd) |
609 |
< |
return; /* new one no better than discard */ |
609 |
> |
return(0); /* new one no better than discard */ |
610 |
|
} |
611 |
|
#endif |
612 |
< |
if (j % FRAGBLK == 0) { /* more free list space */ |
612 |
> |
if (j % FRAGBLK == 0) { /* more (or less) free list space */ |
613 |
|
register BEAMI *newp; |
614 |
|
if (f->fi == NULL) |
615 |
|
newp = (BEAMI *)malloc((j+FRAGBLK)*sizeof(BEAMI)); |
616 |
|
else |
617 |
< |
newp = (BEAMI *)realloc((char *)f->fi, |
617 |
> |
newp = (BEAMI *)realloc((void *)f->fi, |
618 |
|
(j+FRAGBLK)*sizeof(BEAMI)); |
619 |
|
if (newp == NULL) { |
620 |
|
f->nfrags--; /* graceful failure */ |
621 |
< |
return; |
621 |
> |
return(0); |
622 |
|
} |
623 |
|
f->fi = newp; |
624 |
|
} |
628 |
|
f->fi[j].nrd = bi->nrd; |
629 |
|
break; |
630 |
|
} |
631 |
< |
copystruct(f->fi+j, f->fi+(j-1)); |
631 |
> |
*(f->fi+j) = *(f->fi+(j-1)); |
632 |
|
} |
633 |
|
/* coalesce adjacent fragments */ |
634 |
|
/* successors never empty */ |
645 |
|
} |
646 |
|
break; |
647 |
|
} |
648 |
+ |
biglob(hp)->nrd -= bi->nrd; /* tell fragment it's free */ |
649 |
+ |
bi->nrd = 0; |
650 |
+ |
bi->fo = 0; |
651 |
+ |
hdmarkdirty(hp, i); /* assume we'll reallocate */ |
652 |
+ |
return(1); |
653 |
|
} |
654 |
|
|
655 |
|
|
656 |
< |
long |
657 |
< |
hdallocfrag(fd, nrays) /* allocate a file fragment */ |
658 |
< |
int fd; |
659 |
< |
unsigned int4 nrays; |
656 |
> |
extern int |
657 |
> |
hdfragOK( /* get fragment list status for file */ |
658 |
> |
int fd, |
659 |
> |
int *listlen, |
660 |
> |
register int32 *listsiz |
661 |
> |
) |
662 |
|
{ |
663 |
|
register struct fraglist *f; |
664 |
< |
register int j, k; |
557 |
< |
long nfo; |
664 |
> |
register int i; |
665 |
|
|
666 |
+ |
if ((fd < 0) | (fd >= nhdfragls) || !(f = &hdfragl[fd])->nlinks) |
667 |
+ |
return(0); /* listless */ |
668 |
+ |
if (listlen != NULL) |
669 |
+ |
*listlen = f->nfrags; |
670 |
+ |
if (listsiz != NULL) |
671 |
+ |
for (i = f->nfrags, *listsiz = 0; i--; ) |
672 |
+ |
*listsiz += f->fi[i].nrd; |
673 |
+ |
#if MAXFRAGB |
674 |
+ |
return(f->nfrags < MAXFRAGB*FRAGBLK); |
675 |
+ |
#else |
676 |
+ |
return(1); /* list never fills up */ |
677 |
+ |
#endif |
678 |
+ |
} |
679 |
+ |
|
680 |
+ |
|
681 |
+ |
off_t |
682 |
+ |
hdallocfrag( /* allocate a file fragment */ |
683 |
+ |
int fd, |
684 |
+ |
uint32 nrays |
685 |
+ |
) |
686 |
+ |
{ |
687 |
+ |
register struct fraglist *f; |
688 |
+ |
register int j; |
689 |
+ |
off_t nfo; |
690 |
+ |
|
691 |
|
if (nrays == 0) |
692 |
|
return(-1L); |
693 |
< |
#ifdef DEBUG |
694 |
< |
if (fd < 0 | fd >= nhdfragls || !hdfragl[fd].nlinks) |
563 |
< |
error(CONSISTENCY, "bad file descriptor in hdallocfrag"); |
564 |
< |
#endif |
693 |
> |
DCHECK(fd < 0 | fd >= nhdfragls || !hdfragl[fd].nlinks, |
694 |
> |
CONSISTENCY, "bad file descriptor in hdallocfrag"); |
695 |
|
f = &hdfragl[fd]; |
696 |
< |
k = -1; /* find closest-sized fragment */ |
697 |
< |
for (j = f->nfrags; j-- > 0; ) |
698 |
< |
if (f->fi[j].nrd >= nrays && |
699 |
< |
(k < 0 || f->fi[j].nrd < f->fi[k].nrd)) |
570 |
< |
if (f->fi[k=j].nrd == nrays) |
571 |
< |
break; |
572 |
< |
if (k < 0) { /* no fragment -- extend file */ |
696 |
> |
for (j = f->nfrags; j-- > 0; ) /* first fit algorithm */ |
697 |
> |
if (f->fi[j].nrd >= nrays) |
698 |
> |
break; |
699 |
> |
if (j < 0) { /* no fragment -- extend file */ |
700 |
|
nfo = f->flen; |
701 |
|
f->flen += nrays*sizeof(RAYVAL); |
702 |
|
} else { /* else use fragment */ |
703 |
< |
nfo = f->fi[k].fo; |
704 |
< |
f->fi[k].fo += nrays*sizeof(RAYVAL); |
705 |
< |
f->fi[k].nrd -= nrays; |
703 |
> |
nfo = f->fi[j].fo; |
704 |
> |
f->fi[j].fo += nrays*sizeof(RAYVAL); |
705 |
> |
f->fi[j].nrd -= nrays; |
706 |
|
} |
707 |
|
return(nfo); |
708 |
|
} |
709 |
|
|
710 |
|
|
711 |
|
int |
712 |
< |
hdsyncbeam(hp, i) /* sync beam in memory with beam on disk */ |
713 |
< |
register HOLO *hp; |
714 |
< |
register int i; |
712 |
> |
hdsyncbeam( /* sync beam in memory with beam on disk */ |
713 |
> |
register HOLO *hp, |
714 |
> |
register int i |
715 |
> |
) |
716 |
|
{ |
717 |
< |
unsigned int4 nrays; |
717 |
> |
int fragfreed; |
718 |
> |
uint32 nrays; |
719 |
|
unsigned int n; |
720 |
< |
long nfo; |
720 |
> |
off_t nfo; |
721 |
|
/* check file status */ |
722 |
< |
if (hdfragl[hp->fd].writerr) |
723 |
< |
return(-1); |
724 |
< |
#ifdef DEBUG |
725 |
< |
if (i < 1 | i > nbeams(hp)) |
597 |
< |
error(CONSISTENCY, "bad beam index in hdsyncbeam"); |
598 |
< |
#endif |
722 |
> |
if (hdfragl[hp->fd].writable <= 0) |
723 |
> |
return(hdfragl[hp->fd].writable); |
724 |
> |
DCHECK(i < 1 | i > nbeams(hp), |
725 |
> |
CONSISTENCY, "bad beam index in hdsyncbeam"); |
726 |
|
/* is current fragment OK? */ |
727 |
|
if (hp->bl[i] == NULL || (nrays = hp->bl[i]->nrm) == hp->bi[i].nrd) |
728 |
|
return(0); |
729 |
< |
if (hp->bi[i].nrd) /* relinquish old fragment */ |
730 |
< |
hdfreefrag(hp->fd, &hp->bi[i]); |
729 |
> |
/* relinquish old fragment? */ |
730 |
> |
fragfreed = hdfragflags&FF_WRITE && hp->bi[i].nrd && hdfreefrag(hp,i); |
731 |
|
if (nrays) { /* get and write new fragment */ |
732 |
|
nfo = hdallocfrag(hp->fd, nrays); |
733 |
|
errno = 0; |
734 |
< |
if (lseek(hp->fd, nfo, 0) < 0) |
734 |
> |
if (lseek(hp->fd, nfo, SEEK_SET) < 0) |
735 |
|
error(SYSTEM, "cannot seek on holodeck file"); |
736 |
|
n = hp->bl[i]->nrm * sizeof(RAYVAL); |
737 |
|
if (write(hp->fd, (char *)hdbray(hp->bl[i]), n) != n) { |
738 |
< |
hdfragl[hp->fd].writerr++; |
738 |
> |
hdfragl[hp->fd].writable = -1; |
739 |
|
hdsync(NULL, 0); /* sync directories */ |
740 |
|
error(SYSTEM, "write error in hdsyncbeam"); |
741 |
|
} |
742 |
|
hp->bi[i].fo = nfo; |
743 |
|
} else |
744 |
< |
hp->bi[i].fo = 0L; |
744 |
> |
hp->bi[i].fo = 0; |
745 |
|
biglob(hp)->nrd += nrays - hp->bi[i].nrd; |
746 |
|
hp->bi[i].nrd = nrays; |
747 |
< |
markdirty(hp, i); /* section directory now out of date */ |
747 |
> |
if (!fragfreed) |
748 |
> |
hdmarkdirty(hp, i); /* need to flag dir. ent. */ |
749 |
|
return(1); |
750 |
|
} |
751 |
|
|
752 |
|
|
753 |
< |
int |
754 |
< |
hdfreebeam(hp, i) /* free beam, writing if dirty */ |
755 |
< |
register HOLO *hp; |
756 |
< |
register int i; |
753 |
> |
extern int |
754 |
> |
hdfreebeam( /* free beam, writing if dirty */ |
755 |
> |
register HOLO *hp, |
756 |
> |
register int i |
757 |
> |
) |
758 |
|
{ |
759 |
|
int nchanged; |
760 |
|
|
764 |
|
nchanged += hdfreebeam(hdlist[i], 0); |
765 |
|
return(nchanged); |
766 |
|
} |
767 |
< |
if (hdfragl[hp->fd].writerr) /* check for file error */ |
767 |
> |
if (hdfragl[hp->fd].writable < 0) /* check for file error */ |
768 |
|
return(0); |
769 |
|
if (i == 0) { /* clear entire holodeck */ |
770 |
+ |
if (blglob(hp)->nrm == 0) |
771 |
+ |
return(0); /* already clear */ |
772 |
|
nchanged = 0; |
773 |
|
for (i = nbeams(hp); i > 0; i--) |
774 |
|
if (hp->bl[i] != NULL) |
775 |
|
nchanged += hdfreebeam(hp, i); |
776 |
+ |
DCHECK(blglob(hp)->nrm != 0, |
777 |
+ |
CONSISTENCY, "bad beam count in hdfreebeam"); |
778 |
|
return(nchanged); |
779 |
|
} |
780 |
< |
#ifdef DEBUG |
781 |
< |
if (i < 1 | i > nbeams(hp)) |
649 |
< |
error(CONSISTENCY, "bad beam index to hdfreebeam"); |
650 |
< |
#endif |
780 |
> |
DCHECK(i < 1 | i > nbeams(hp), |
781 |
> |
CONSISTENCY, "bad beam index to hdfreebeam"); |
782 |
|
if (hp->bl[i] == NULL) |
783 |
|
return(0); |
784 |
|
/* check for additions */ |
786 |
|
if (nchanged) |
787 |
|
hdsyncbeam(hp, i); /* write new fragment */ |
788 |
|
blglob(hp)->nrm -= hp->bl[i]->nrm; |
789 |
< |
free((char *)hp->bl[i]); /* free memory */ |
789 |
> |
free((void *)hp->bl[i]); /* free memory */ |
790 |
|
hp->bl[i] = NULL; |
791 |
|
return(nchanged); |
792 |
|
} |
793 |
|
|
794 |
|
|
795 |
< |
int |
796 |
< |
hdkillbeam(hp, i) /* delete beam from holodeck */ |
797 |
< |
register HOLO *hp; |
798 |
< |
register int i; |
795 |
> |
extern int |
796 |
> |
hdkillbeam( /* delete beam from holodeck */ |
797 |
> |
register HOLO *hp, |
798 |
> |
register int i |
799 |
> |
) |
800 |
|
{ |
669 |
– |
static BEAM emptybeam; |
801 |
|
int nchanged; |
802 |
|
|
803 |
|
if (hp == NULL) { /* clobber all holodecks */ |
807 |
|
return(nchanged); |
808 |
|
} |
809 |
|
if (i == 0) { /* clobber entire holodeck */ |
810 |
+ |
if ((biglob(hp)->nrd == 0) & (blglob(hp)->nrm == 0)) |
811 |
+ |
return(0); /* already empty */ |
812 |
|
nchanged = 0; |
813 |
+ |
nchanged = 0; |
814 |
|
for (i = nbeams(hp); i > 0; i--) |
815 |
|
if (hp->bi[i].nrd > 0 || hp->bl[i] != NULL) |
816 |
|
nchanged += hdkillbeam(hp, i); |
817 |
< |
#ifdef DEBUG |
818 |
< |
if (biglob(hp)->nrd != 0 | blglob(hp)->nrm != 0) |
685 |
< |
error(CONSISTENCY, "bad beam count in hdkillbeam"); |
686 |
< |
#endif |
817 |
> |
DCHECK(biglob(hp)->nrd != 0 | blglob(hp)->nrm != 0, |
818 |
> |
CONSISTENCY, "bad beam count in hdkillbeam"); |
819 |
|
return(nchanged); |
820 |
|
} |
821 |
< |
#ifdef DEBUG |
822 |
< |
if (i < 1 | i > nbeams(hp)) |
823 |
< |
error(CONSISTENCY, "bad beam index to hdkillbeam"); |
824 |
< |
#endif |
821 |
> |
DCHECK(i < 1 | i > nbeams(hp), CONSISTENCY, |
822 |
> |
"bad beam index to hdkillbeam"); |
823 |
> |
DCHECK(!hdfragl[hp->fd].writable, CONSISTENCY, |
824 |
> |
"hdkillbeam called on read-only holodeck"); |
825 |
|
if (hp->bl[i] != NULL) { /* free memory */ |
826 |
|
blglob(hp)->nrm -= nchanged = hp->bl[i]->nrm; |
827 |
< |
free((char *)hp->bl[i]); |
827 |
> |
free((void *)hp->bl[i]); |
828 |
> |
hp->bl[i] = NULL; |
829 |
|
} else |
830 |
|
nchanged = hp->bi[i].nrd; |
831 |
< |
if (hp->bi[i].nrd) { /* free file fragment */ |
832 |
< |
hp->bl[i] = &emptybeam; |
833 |
< |
hdsyncbeam(hp, i); |
831 |
> |
if (hp->bi[i].nrd && !(hdfragflags&FF_KILL && hdfreefrag(hp,i))) { |
832 |
> |
biglob(hp)->nrd -= hp->bi[i].nrd; /* free failed */ |
833 |
> |
hp->bi[i].nrd = 0; |
834 |
> |
hp->bi[i].fo = 0; |
835 |
> |
hdmarkdirty(hp, i); |
836 |
|
} |
702 |
– |
hp->bl[i] = NULL; |
837 |
|
return(nchanged); |
838 |
|
} |
839 |
|
|
840 |
|
|
841 |
|
int |
842 |
< |
hdlrulist(hb, nents, n, hp) /* add beams from holodeck to LRU list */ |
843 |
< |
register HDBEAMI *hb; /* beam list */ |
844 |
< |
int nents; /* current list length */ |
845 |
< |
int n; /* maximum list length */ |
846 |
< |
register HOLO *hp; /* section we're adding from */ |
842 |
> |
hdlrulist( /* add beams from holodeck to LRU list */ |
843 |
> |
register HDBEAMI *hb, /* beam list */ |
844 |
> |
int nents, /* current list length */ |
845 |
> |
int n, /* maximum list length */ |
846 |
> |
register HOLO *hp /* section we're adding from */ |
847 |
> |
) |
848 |
|
{ |
849 |
|
register int i, j; |
850 |
|
/* insert each beam from hp */ |
864 |
|
hb[j].b = i; |
865 |
|
break; |
866 |
|
} |
867 |
< |
copystruct(hb+j, hb+(j-1)); |
867 |
> |
*(hb+j) = *(hb+(j-1)); |
868 |
|
} |
869 |
|
} |
870 |
|
return(nents); /* return new list length */ |
872 |
|
|
873 |
|
|
874 |
|
int |
875 |
< |
hdfreecache(pct, honly) /* free up cache space, writing changes */ |
876 |
< |
int pct; /* maximum percentage to free */ |
877 |
< |
register HOLO *honly; /* NULL means check all */ |
875 |
> |
hdfreecache( /* free up cache space, writing changes */ |
876 |
> |
int pct, /* maximum percentage to free */ |
877 |
> |
register HOLO *honly /* NULL means check all */ |
878 |
> |
) |
879 |
|
{ |
880 |
|
HDBEAMI hb[FREEBEAMS]; |
881 |
|
int freetarget; |
916 |
|
} |
917 |
|
|
918 |
|
|
919 |
< |
hddone(hp) /* clean up holodeck section and free */ |
920 |
< |
register HOLO *hp; /* NULL means clean up all */ |
919 |
> |
extern void |
920 |
> |
hddone( /* clean up holodeck section and free */ |
921 |
> |
register HOLO *hp /* NULL means clean up all */ |
922 |
> |
) |
923 |
|
{ |
924 |
|
register int i; |
925 |
|
|
926 |
|
if (hp == NULL) { /* NULL means clean up everything */ |
927 |
|
while (hdlist[0] != NULL) |
928 |
|
hddone(hdlist[0]); |
929 |
< |
free((char *)hdfragl); |
929 |
> |
free((void *)hdfragl); |
930 |
|
hdfragl = NULL; nhdfragls = 0; |
931 |
|
return; |
932 |
|
} |
933 |
|
/* flush all data and free memory */ |
934 |
< |
hdfreebeam(hp, 0); |
797 |
< |
hdsync(hp, 0); |
934 |
> |
hdflush(hp); |
935 |
|
/* release fragment resources */ |
936 |
|
hdrelease(hp->fd); |
937 |
|
/* remove hp from active list */ |
941 |
|
i++; |
942 |
|
break; |
943 |
|
} |
944 |
< |
free((char *)hp->bl); /* free beam list */ |
945 |
< |
free((char *)hp); /* free holodeck struct */ |
944 |
> |
free((void *)hp->bl); /* free beam list */ |
945 |
> |
free((void *)hp); /* free holodeck struct */ |
946 |
|
} |