103 |
|
} |
104 |
|
|
105 |
|
|
106 |
– |
markdirty(hp) /* mark holodeck section directory dirty */ |
107 |
– |
register HOLO *hp; |
108 |
– |
{ |
109 |
– |
static BEAMI smudge = {0, -1}; |
110 |
– |
|
111 |
– |
if (hp->dirty) /* already marked? */ |
112 |
– |
return; |
113 |
– |
hp->dirty = 1; |
114 |
– |
if (lseek(hp->fd, biglob(hp)->fo+(nbeams(hp)-1)*sizeof(BEAMI), 0) < 0 |
115 |
– |
|| write(hp->fd, (char *)&smudge, |
116 |
– |
sizeof(BEAMI)) != sizeof(BEAMI)) |
117 |
– |
error(SYSTEM, "seek/write error in markdirty"); |
118 |
– |
} |
119 |
– |
|
120 |
– |
|
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 |
|
|
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 */ |