14 |
|
/* Modifier contribution queue (results waiting to be output) */ |
15 |
|
typedef struct s_binq { |
16 |
|
int ndx; /* index for this entry */ |
17 |
< |
int n2add; /* number left to add */ |
17 |
> |
int nadded; /* accumulated so far */ |
18 |
|
struct s_binq *next; /* next in queue */ |
19 |
|
MODCONT *mca[1]; /* contrib. array (extends struct) */ |
20 |
|
} BINQ; |
26 |
|
static FILE *inq_fp[MAXPROCESS]; /* input streams */ |
27 |
|
|
28 |
|
|
29 |
< |
/* Get new (empty) bin queue entry */ |
29 |
> |
/* Get new bin queue entry */ |
30 |
|
static BINQ * |
31 |
|
new_binq() |
32 |
|
{ |
33 |
< |
BINQ *bp = free_bq; |
33 |
> |
BINQ *bp; |
34 |
|
int i; |
35 |
|
|
36 |
< |
if (bp != NULL) { /* something already available? */ |
36 |
> |
if (free_bq != NULL) { /* something already available? */ |
37 |
> |
bp = free_bq; |
38 |
|
free_bq = bp->next; |
39 |
|
bp->next = NULL; |
40 |
< |
bp->n2add = accumulate-1; |
40 |
> |
bp->nadded = 1; |
41 |
|
return(bp); |
42 |
|
} |
43 |
|
/* else allocate fresh */ |
44 |
< |
bp = (BINQ *)malloc(sizeof(BINQ)+(nmods-1)*sizeof(MODCONT *)); |
44 |
> |
bp = (BINQ *)malloc(sizeof(BINQ) + sizeof(MODCONT *)*(nmods-1)); |
45 |
|
if (bp == NULL) |
46 |
|
goto memerr; |
47 |
|
for (i = nmods; i--; ) { |
54 |
|
/* memset(bp->mca[i]->cbin, 0, sizeof(DCOLOR)*mp->nbins); */ |
55 |
|
} |
56 |
|
bp->ndx = 0; |
57 |
< |
bp->n2add = accumulate-1; |
57 |
> |
bp->nadded = 1; |
58 |
|
bp->next = NULL; |
59 |
|
return(bp); |
60 |
|
memerr: |
106 |
|
addcolor(mpout->cbin[j], mpin->cbin[j]); |
107 |
|
memset(mpin->cbin, 0, sizeof(DCOLOR)*mpin->nbins); |
108 |
|
} |
109 |
+ |
out_bq->nadded++; |
110 |
|
} |
111 |
|
|
112 |
|
|
113 |
< |
/* Sum one modifier record into another (doesn't update n2add) */ |
113 |
> |
/* Sum one modifier record into another (updates nadded) */ |
114 |
|
static void |
115 |
|
add_modbin(BINQ *dst, BINQ *src) |
116 |
|
{ |
122 |
|
for (j = mpout->nbins; j--; ) |
123 |
|
addcolor(mpout->cbin[j], mpin->cbin[j]); |
124 |
|
} |
125 |
+ |
dst->nadded += src->nadded; |
126 |
|
} |
127 |
|
|
128 |
|
|
146 |
|
for (b_cur = out_bq; b_cur != NULL && b_cur->ndx < bp->ndx; |
147 |
|
b_cur = b_cur->next) |
148 |
|
b_last = b_cur; |
149 |
+ |
|
150 |
|
if (b_last != NULL) { |
151 |
|
bp->next = b_cur; |
152 |
|
b_last->next = bp; |
158 |
|
return; |
159 |
|
b_cur = out_bq; /* else merge accumulation entries */ |
160 |
|
while (b_cur->next != NULL) { |
161 |
< |
if (b_cur->n2add <= 0 || |
161 |
> |
if (b_cur->nadded >= accumulate || |
162 |
|
(b_cur->ndx-1)/accumulate != |
163 |
|
(b_cur->next->ndx-1)/accumulate) { |
164 |
|
b_cur = b_cur->next; |
165 |
|
continue; |
166 |
|
} |
167 |
|
add_modbin(b_cur, b_cur->next); |
164 |
– |
b_cur->n2add--; |
168 |
|
b_last = b_cur->next; |
169 |
|
b_cur->next = b_last->next; |
170 |
|
b_last->next = NULL; |
173 |
|
} |
174 |
|
|
175 |
|
|
176 |
< |
/* Get current with output queue by producing ready results */ |
176 |
> |
/* Count number of records ready for output */ |
177 |
|
static int |
178 |
< |
output_catchup() |
178 |
> |
queue_ready() |
179 |
|
{ |
180 |
+ |
int nready = 0; |
181 |
+ |
BINQ *bp; |
182 |
+ |
|
183 |
+ |
if (accumulate <= 0) /* just accumulating? */ |
184 |
+ |
return(0); |
185 |
+ |
|
186 |
+ |
for (bp = out_bq; bp != NULL && bp->nadded >= accumulate && |
187 |
+ |
bp->ndx == lastdone+nready*accumulate+1; |
188 |
+ |
bp = bp->next) |
189 |
+ |
++nready; |
190 |
+ |
|
191 |
+ |
return(nready); |
192 |
+ |
} |
193 |
+ |
|
194 |
+ |
|
195 |
+ |
/* Catch up with output queue by producing ready results */ |
196 |
+ |
static int |
197 |
+ |
output_catchup(int nmax) |
198 |
+ |
{ |
199 |
|
int nout = 0; |
200 |
|
BINQ *bp; |
201 |
|
int i; |
203 |
|
if (accumulate <= 0) /* just accumulating? */ |
204 |
|
return(0); |
205 |
|
/* else output ready results */ |
206 |
< |
while (out_bq != NULL && (out_bq->ndx == lastdone+1) & !out_bq->n2add) { |
206 |
> |
while (out_bq != NULL && out_bq->nadded >= accumulate |
207 |
> |
&& out_bq->ndx == lastdone+1) { |
208 |
> |
if ((nmax > 0) & (nout >= nmax)) |
209 |
> |
break; |
210 |
|
bp = out_bq; /* pop off first entry */ |
211 |
|
out_bq = bp->next; |
212 |
|
bp->next = NULL; |
232 |
|
memset(bp->mca[i]->cbin, 0, sizeof(DCOLOR)*bp->mca[i]->nbins); |
233 |
|
bp->ndx = ndx; |
234 |
|
queue_output(bp); |
235 |
< |
output_catchup(); |
235 |
> |
output_catchup(0); |
236 |
|
} |
237 |
|
|
238 |
|
|
265 |
|
pid = fork(); /* fork parent process */ |
266 |
|
if (pid == 0) { /* if in child, set up & return true */ |
267 |
|
close(p0[1]); close(p1[0]); |
268 |
+ |
lu_doall(&modconttab, set_stdout, NULL); |
269 |
+ |
lu_done(&ofiletab); |
270 |
+ |
while (nchild--) { /* don't share other pipes */ |
271 |
+ |
close(kida[nchild].w); |
272 |
+ |
fclose(inq_fp[nchild]); |
273 |
+ |
} |
274 |
|
dup2(p0[0], 0); close(p0[0]); |
275 |
|
dup2(p1[1], 1); close(p1[1]); |
276 |
|
inpfmt = (sizeof(RREAL)==sizeof(double)) ? 'd' : 'f'; |
280 |
|
yres = 0; |
281 |
|
raysleft = 0; |
282 |
|
account = accumulate = 1; |
252 |
– |
lu_doall(&modconttab, set_stdout, NULL); |
253 |
– |
nchild = -1; |
283 |
|
return(1); /* child return value */ |
284 |
|
} |
285 |
|
if (pid < 0) |
309 |
|
{ |
310 |
|
int status; |
311 |
|
|
312 |
< |
while (nchild-- > 0) { |
312 |
> |
while (nchild > 0) { |
313 |
> |
nchild--; |
314 |
|
kida[nchild].r = -1; /* close(-1) error is ignored */ |
315 |
|
if ((status = close_process(&kida[nchild])) > 0) { |
316 |
|
sprintf(errmsg, |
323 |
|
} |
324 |
|
|
325 |
|
|
326 |
< |
/* Wait for the next available child, managing output queue as well */ |
326 |
> |
/* Wait for the next available child, managing output queue simultaneously */ |
327 |
|
static int |
328 |
< |
next_child_nq(int force_wait) |
328 |
> |
next_child_nq(int flushing) |
329 |
|
{ |
330 |
|
static struct timeval polling; |
331 |
< |
struct timeval *pmode = force_wait | (accumulate <= 0) ? |
302 |
< |
(struct timeval *)NULL : &polling; |
331 |
> |
struct timeval *pmode; |
332 |
|
fd_set readset, errset; |
333 |
< |
int i, j, n, nr; |
333 |
> |
int i, j, n, nr, nqr; |
334 |
|
|
335 |
< |
if (!force_wait) /* see if there's one free */ |
335 |
> |
if (!flushing) /* see if there's one free */ |
336 |
|
for (i = nchild; i--; ) |
337 |
|
if (kida[i].running < 0) |
338 |
|
return(i); |
339 |
+ |
|
340 |
+ |
nqr = queue_ready(); /* choose blocking mode or polling */ |
341 |
+ |
if ((nqr > 0) & !flushing) |
342 |
+ |
pmode = &polling; |
343 |
+ |
else |
344 |
+ |
pmode = NULL; |
345 |
+ |
tryagain: /* catch up with output? */ |
346 |
+ |
if (pmode == &polling) { |
347 |
+ |
if (nqr > nchild) /* don't get too far behind */ |
348 |
+ |
nqr -= output_catchup(nqr-nchild); |
349 |
+ |
} else if (nqr > 0) /* clear output before blocking */ |
350 |
+ |
nqr -= output_catchup(0); |
351 |
|
/* prepare select() call */ |
352 |
|
FD_ZERO(&readset); FD_ZERO(&errset); |
353 |
|
n = nr = 0; |
360 |
|
if (kida[i].r >= n) |
361 |
|
n = kida[i].r + 1; |
362 |
|
} |
322 |
– |
tryagain: |
323 |
– |
if (pmode == NULL) /* catch up in case we block */ |
324 |
– |
output_catchup(); |
363 |
|
if (!nr) /* nothing to wait for? */ |
364 |
|
return(-1); |
365 |
|
if ((nr > 1) | (pmode == &polling)) { |
366 |
|
errno = 0; |
367 |
< |
i = select(n, &readset, NULL, &errset, pmode); |
368 |
< |
if (!i) { |
367 |
> |
nr = select(n, &readset, NULL, &errset, pmode); |
368 |
> |
if (!nr) { |
369 |
|
pmode = NULL; /* try again, blocking this time */ |
370 |
|
goto tryagain; |
371 |
|
} |
372 |
< |
if (i < 0) |
372 |
> |
if (nr < 0) |
373 |
|
error(SYSTEM, "select() error in next_child_nq()"); |
374 |
|
} else |
375 |
|
FD_ZERO(&errset); |
425 |
|
} |
426 |
|
if (d == 0.0) { |
427 |
|
if ((yres <= 0) | (xres <= 0)) |
428 |
< |
waitflush = 1; /* flush right after */ |
428 |
> |
waitflush = 1; /* flush next */ |
429 |
|
put_zero_record(++lastray); |
430 |
|
} else { /* else assign ray */ |
431 |
< |
i = next_child_nq(0); |
431 |
> |
i = next_child_nq(0); /* manages output */ |
432 |
|
if (writebuf(kida[i].w, (char *)orgdir, |
433 |
|
sizeof(orgdir)) != sizeof(orgdir)) |
434 |
|
error(SYSTEM, "pipe write error"); |
435 |
< |
kida[i].running = ++lastray; |
435 |
> |
kida[i].running = ++lastray; /* busy now */ |
436 |
|
} |
437 |
|
if (raysleft && !--raysleft) |
438 |
|
break; /* preemptive EOI */ |
441 |
|
; |
442 |
|
/* output accumulated record */ |
443 |
|
if (accumulate <= 0 || account < accumulate) { |
444 |
+ |
end_children(); /* frees up file descriptors */ |
445 |
|
if (account < accumulate) { |
446 |
|
error(WARNING, "partial accumulation in final record"); |
447 |
|
accumulate -= account; |