1 |
#if __linux |
2 |
# define _GNU_SOURCE |
3 |
#endif |
4 |
|
5 |
#define _REENTRANT 1 |
6 |
|
7 |
#include <errno.h> |
8 |
|
9 |
#include "EXTERN.h" |
10 |
#include "perl.h" |
11 |
#include "XSUB.h" |
12 |
|
13 |
#include "autoconf/config.h" |
14 |
|
15 |
#include <pthread.h> |
16 |
|
17 |
#include <stddef.h> |
18 |
#include <errno.h> |
19 |
#include <sys/time.h> |
20 |
#include <sys/select.h> |
21 |
#include <sys/types.h> |
22 |
#include <sys/stat.h> |
23 |
#include <limits.h> |
24 |
#include <unistd.h> |
25 |
#include <fcntl.h> |
26 |
#include <signal.h> |
27 |
#include <sched.h> |
28 |
|
29 |
#if HAVE_SENDFILE |
30 |
# if __linux |
31 |
# include <sys/sendfile.h> |
32 |
# elif __freebsd |
33 |
# include <sys/socket.h> |
34 |
# include <sys/uio.h> |
35 |
# elif __hpux |
36 |
# include <sys/socket.h> |
37 |
# elif __solaris /* not yet */ |
38 |
# include <sys/sendfile.h> |
39 |
# else |
40 |
# error sendfile support requested but not available |
41 |
# endif |
42 |
#endif |
43 |
|
44 |
/* used for struct dirent, AIX doesn't provide it */ |
45 |
#ifndef NAME_MAX |
46 |
# define NAME_MAX 4096 |
47 |
#endif |
48 |
|
49 |
#if __ia64 |
50 |
# define STACKSIZE 65536 |
51 |
#elif __i386 || __x86_64 /* 16k is unreasonably high :( */ |
52 |
# define STACKSIZE PTHREAD_STACK_MIN |
53 |
#else |
54 |
# define STACKSIZE 16384 |
55 |
#endif |
56 |
|
57 |
/* buffer size for various temporary buffers */ |
58 |
#define AIO_BUFSIZE 65536 |
59 |
|
60 |
#define dBUF \ |
61 |
char *aio_buf = malloc (AIO_BUFSIZE); \ |
62 |
if (!aio_buf) \ |
63 |
return -1; |
64 |
|
65 |
#define fBUF free (aio_buf) |
66 |
|
67 |
enum { |
68 |
REQ_QUIT, |
69 |
REQ_OPEN, REQ_CLOSE, |
70 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
71 |
REQ_SENDFILE, |
72 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
73 |
REQ_FSYNC, REQ_FDATASYNC, |
74 |
REQ_UNLINK, REQ_RMDIR, REQ_RENAME, |
75 |
REQ_READDIR, |
76 |
REQ_LINK, REQ_SYMLINK, |
77 |
REQ_GROUP, REQ_NOP, |
78 |
REQ_SLEEP, |
79 |
}; |
80 |
|
81 |
#define AIO_REQ_KLASS "IO::AIO::REQ" |
82 |
#define AIO_GRP_KLASS "IO::AIO::GRP" |
83 |
|
84 |
typedef struct aio_cb |
85 |
{ |
86 |
struct aio_cb *volatile next; |
87 |
|
88 |
SV *data, *callback; |
89 |
SV *fh, *fh2; |
90 |
void *dataptr, *data2ptr; |
91 |
Stat_t *statdata; |
92 |
off_t offset; |
93 |
size_t length; |
94 |
ssize_t result; |
95 |
|
96 |
STRLEN dataoffset; |
97 |
int type; |
98 |
int fd, fd2; |
99 |
int errorno; |
100 |
mode_t mode; /* open */ |
101 |
|
102 |
unsigned char flags; |
103 |
unsigned char pri; |
104 |
|
105 |
SV *self; /* the perl counterpart of this request, if any */ |
106 |
struct aio_cb *grp, *grp_prev, *grp_next, *grp_first; |
107 |
} aio_cb; |
108 |
|
109 |
enum { |
110 |
FLAG_CANCELLED = 0x01, |
111 |
}; |
112 |
|
113 |
typedef aio_cb *aio_req; |
114 |
typedef aio_cb *aio_req_ornot; |
115 |
|
116 |
enum { |
117 |
PRI_MIN = -4, |
118 |
PRI_MAX = 4, |
119 |
|
120 |
DEFAULT_PRI = 0, |
121 |
PRI_BIAS = -PRI_MIN, |
122 |
NUM_PRI = PRI_MAX + PRI_BIAS + 1, |
123 |
}; |
124 |
|
125 |
static int next_pri = DEFAULT_PRI + PRI_BIAS; |
126 |
|
127 |
static int started, wanted; |
128 |
static volatile int nreqs; |
129 |
static int max_outstanding = 1<<30; |
130 |
static int respipe [2]; |
131 |
|
132 |
#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
133 |
# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
134 |
#else |
135 |
# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER |
136 |
#endif |
137 |
|
138 |
static pthread_mutex_t reslock = AIO_MUTEX_INIT; |
139 |
static pthread_mutex_t reqlock = AIO_MUTEX_INIT; |
140 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
141 |
|
142 |
/* |
143 |
* a somewhat faster data structure might be nice, but |
144 |
* with 8 priorities this actually needs <20 insns |
145 |
* per shift, the most expensive operation. |
146 |
*/ |
147 |
typedef struct { |
148 |
aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */ |
149 |
int size; |
150 |
} reqq; |
151 |
|
152 |
static reqq req_queue; |
153 |
static reqq res_queue; |
154 |
|
155 |
int reqq_push (reqq *q, aio_req req) |
156 |
{ |
157 |
int pri = req->pri; |
158 |
req->next = 0; |
159 |
|
160 |
if (q->qe[pri]) |
161 |
{ |
162 |
q->qe[pri]->next = req; |
163 |
q->qe[pri] = req; |
164 |
} |
165 |
else |
166 |
q->qe[pri] = q->qs[pri] = req; |
167 |
|
168 |
return q->size++; |
169 |
} |
170 |
|
171 |
aio_req reqq_shift (reqq *q) |
172 |
{ |
173 |
int pri; |
174 |
|
175 |
if (!q->size) |
176 |
return 0; |
177 |
|
178 |
--q->size; |
179 |
|
180 |
for (pri = NUM_PRI; pri--; ) |
181 |
{ |
182 |
aio_req req = q->qs[pri]; |
183 |
|
184 |
if (req) |
185 |
{ |
186 |
if (!(q->qs[pri] = req->next)) |
187 |
q->qe[pri] = 0; |
188 |
|
189 |
return req; |
190 |
} |
191 |
} |
192 |
|
193 |
abort (); |
194 |
} |
195 |
|
196 |
static void req_invoke (aio_req req); |
197 |
static void req_free (aio_req req); |
198 |
|
199 |
/* must be called at most once */ |
200 |
static SV *req_sv (aio_req req, const char *klass) |
201 |
{ |
202 |
if (!req->self) |
203 |
{ |
204 |
req->self = (SV *)newHV (); |
205 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
206 |
} |
207 |
|
208 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
209 |
} |
210 |
|
211 |
static aio_req SvAIO_REQ (SV *sv) |
212 |
{ |
213 |
MAGIC *mg; |
214 |
|
215 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
216 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
217 |
|
218 |
mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
219 |
|
220 |
return mg ? (aio_req)mg->mg_ptr : 0; |
221 |
} |
222 |
|
223 |
static void aio_grp_feed (aio_req grp) |
224 |
{ |
225 |
while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED)) |
226 |
{ |
227 |
int old_len = grp->length; |
228 |
|
229 |
if (grp->fh2 && SvOK (grp->fh2)) |
230 |
{ |
231 |
dSP; |
232 |
|
233 |
ENTER; |
234 |
SAVETMPS; |
235 |
PUSHMARK (SP); |
236 |
XPUSHs (req_sv (grp, AIO_GRP_KLASS)); |
237 |
PUTBACK; |
238 |
call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR); |
239 |
SPAGAIN; |
240 |
FREETMPS; |
241 |
LEAVE; |
242 |
} |
243 |
|
244 |
/* stop if no progress has been made */ |
245 |
if (old_len == grp->length) |
246 |
{ |
247 |
SvREFCNT_dec (grp->fh2); |
248 |
grp->fh2 = 0; |
249 |
break; |
250 |
} |
251 |
} |
252 |
} |
253 |
|
254 |
static void aio_grp_dec (aio_req grp) |
255 |
{ |
256 |
--grp->length; |
257 |
|
258 |
/* call feeder, if applicable */ |
259 |
aio_grp_feed (grp); |
260 |
|
261 |
/* finish, if done */ |
262 |
if (!grp->length && grp->fd) |
263 |
{ |
264 |
req_invoke (grp); |
265 |
req_free (grp); |
266 |
} |
267 |
} |
268 |
|
269 |
static void poll_wait () |
270 |
{ |
271 |
fd_set rfd; |
272 |
|
273 |
while (nreqs) |
274 |
{ |
275 |
int size; |
276 |
#if !(__i386 || __x86_64) /* safe without sempahore on this archs */ |
277 |
pthread_mutex_lock (&reslock); |
278 |
#endif |
279 |
size = res_queue.size; |
280 |
#if !(__i386 || __x86_64) /* safe without sempahore on this archs */ |
281 |
pthread_mutex_unlock (&reslock); |
282 |
#endif |
283 |
|
284 |
if (size) |
285 |
return; |
286 |
|
287 |
FD_ZERO(&rfd); |
288 |
FD_SET(respipe [0], &rfd); |
289 |
|
290 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
291 |
} |
292 |
} |
293 |
|
294 |
static void req_invoke (aio_req req) |
295 |
{ |
296 |
dSP; |
297 |
|
298 |
if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback)) |
299 |
{ |
300 |
errno = req->errorno; |
301 |
|
302 |
ENTER; |
303 |
SAVETMPS; |
304 |
PUSHMARK (SP); |
305 |
EXTEND (SP, 1); |
306 |
|
307 |
switch (req->type) |
308 |
{ |
309 |
case REQ_READDIR: |
310 |
{ |
311 |
SV *rv = &PL_sv_undef; |
312 |
|
313 |
if (req->result >= 0) |
314 |
{ |
315 |
char *buf = req->data2ptr; |
316 |
AV *av = newAV (); |
317 |
|
318 |
while (req->result) |
319 |
{ |
320 |
SV *sv = newSVpv (buf, 0); |
321 |
|
322 |
av_push (av, sv); |
323 |
buf += SvCUR (sv) + 1; |
324 |
req->result--; |
325 |
} |
326 |
|
327 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
328 |
} |
329 |
|
330 |
PUSHs (rv); |
331 |
} |
332 |
break; |
333 |
|
334 |
case REQ_OPEN: |
335 |
{ |
336 |
/* convert fd to fh */ |
337 |
SV *fh; |
338 |
|
339 |
PUSHs (sv_2mortal (newSViv (req->result))); |
340 |
PUTBACK; |
341 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
342 |
SPAGAIN; |
343 |
|
344 |
fh = SvREFCNT_inc (POPs); |
345 |
|
346 |
PUSHMARK (SP); |
347 |
XPUSHs (sv_2mortal (fh)); |
348 |
} |
349 |
break; |
350 |
|
351 |
case REQ_GROUP: |
352 |
req->fd = 2; /* mark group as finished */ |
353 |
|
354 |
if (req->data) |
355 |
{ |
356 |
int i; |
357 |
AV *av = (AV *)req->data; |
358 |
|
359 |
EXTEND (SP, AvFILL (av) + 1); |
360 |
for (i = 0; i <= AvFILL (av); ++i) |
361 |
PUSHs (*av_fetch (av, i, 0)); |
362 |
} |
363 |
break; |
364 |
|
365 |
case REQ_NOP: |
366 |
case REQ_SLEEP: |
367 |
break; |
368 |
|
369 |
default: |
370 |
PUSHs (sv_2mortal (newSViv (req->result))); |
371 |
break; |
372 |
} |
373 |
|
374 |
|
375 |
PUTBACK; |
376 |
call_sv (req->callback, G_VOID | G_EVAL); |
377 |
SPAGAIN; |
378 |
|
379 |
FREETMPS; |
380 |
LEAVE; |
381 |
} |
382 |
|
383 |
if (req->grp) |
384 |
{ |
385 |
aio_req grp = req->grp; |
386 |
|
387 |
/* unlink request */ |
388 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
389 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
390 |
|
391 |
if (grp->grp_first == req) |
392 |
grp->grp_first = req->grp_next; |
393 |
|
394 |
aio_grp_dec (grp); |
395 |
} |
396 |
|
397 |
if (SvTRUE (ERRSV)) |
398 |
{ |
399 |
req_free (req); |
400 |
croak (0); |
401 |
} |
402 |
} |
403 |
|
404 |
static void req_free (aio_req req) |
405 |
{ |
406 |
if (req->self) |
407 |
{ |
408 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
409 |
SvREFCNT_dec (req->self); |
410 |
} |
411 |
|
412 |
SvREFCNT_dec (req->data); |
413 |
SvREFCNT_dec (req->fh); |
414 |
SvREFCNT_dec (req->fh2); |
415 |
SvREFCNT_dec (req->callback); |
416 |
Safefree (req->statdata); |
417 |
|
418 |
if (req->type == REQ_READDIR && req->result >= 0) |
419 |
free (req->data2ptr); |
420 |
|
421 |
Safefree (req); |
422 |
} |
423 |
|
424 |
static void req_cancel (aio_req req) |
425 |
{ |
426 |
req->flags |= FLAG_CANCELLED; |
427 |
|
428 |
if (req->type == REQ_GROUP) |
429 |
{ |
430 |
aio_req sub; |
431 |
|
432 |
for (sub = req->grp_first; sub; sub = sub->grp_next) |
433 |
req_cancel (sub); |
434 |
} |
435 |
} |
436 |
|
437 |
static int poll_cb () |
438 |
{ |
439 |
dSP; |
440 |
int count = 0; |
441 |
int do_croak = 0; |
442 |
aio_req req; |
443 |
|
444 |
for (;;) |
445 |
{ |
446 |
pthread_mutex_lock (&reslock); |
447 |
req = reqq_shift (&res_queue); |
448 |
|
449 |
if (req) |
450 |
{ |
451 |
if (!res_queue.size) |
452 |
{ |
453 |
/* read any signals sent by the worker threads */ |
454 |
char buf [32]; |
455 |
while (read (respipe [0], buf, 32) == 32) |
456 |
; |
457 |
} |
458 |
} |
459 |
|
460 |
pthread_mutex_unlock (&reslock); |
461 |
|
462 |
if (!req) |
463 |
break; |
464 |
|
465 |
--nreqs; |
466 |
|
467 |
if (req->type == REQ_QUIT) |
468 |
started--; |
469 |
else if (req->type == REQ_GROUP && req->length) |
470 |
{ |
471 |
req->fd = 1; /* mark request as delayed */ |
472 |
continue; |
473 |
} |
474 |
else |
475 |
{ |
476 |
if (req->type == REQ_READ) |
477 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
478 |
|
479 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
480 |
SvREADONLY_off (req->data); |
481 |
|
482 |
if (req->statdata) |
483 |
{ |
484 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
485 |
PL_laststatval = req->result; |
486 |
PL_statcache = *(req->statdata); |
487 |
} |
488 |
|
489 |
req_invoke (req); |
490 |
|
491 |
count++; |
492 |
} |
493 |
|
494 |
req_free (req); |
495 |
} |
496 |
|
497 |
return count; |
498 |
} |
499 |
|
500 |
static void *aio_proc(void *arg); |
501 |
|
502 |
static void start_thread (void) |
503 |
{ |
504 |
sigset_t fullsigset, oldsigset; |
505 |
pthread_t tid; |
506 |
pthread_attr_t attr; |
507 |
|
508 |
pthread_attr_init (&attr); |
509 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
510 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
511 |
|
512 |
sigfillset (&fullsigset); |
513 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
514 |
|
515 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
516 |
started++; |
517 |
|
518 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
519 |
} |
520 |
|
521 |
static void req_send (aio_req req) |
522 |
{ |
523 |
while (started < wanted && nreqs >= started) |
524 |
start_thread (); |
525 |
|
526 |
++nreqs; |
527 |
|
528 |
pthread_mutex_lock (&reqlock); |
529 |
reqq_push (&req_queue, req); |
530 |
pthread_cond_signal (&reqwait); |
531 |
pthread_mutex_unlock (&reqlock); |
532 |
|
533 |
if (nreqs > max_outstanding) |
534 |
for (;;) |
535 |
{ |
536 |
poll_cb (); |
537 |
|
538 |
if (nreqs <= max_outstanding) |
539 |
break; |
540 |
|
541 |
poll_wait (); |
542 |
} |
543 |
} |
544 |
|
545 |
static void end_thread (void) |
546 |
{ |
547 |
aio_req req; |
548 |
|
549 |
Newz (0, req, 1, aio_cb); |
550 |
|
551 |
req->type = REQ_QUIT; |
552 |
req->pri = PRI_MAX + PRI_BIAS; |
553 |
|
554 |
req_send (req); |
555 |
} |
556 |
|
557 |
static void min_parallel (int nthreads) |
558 |
{ |
559 |
if (wanted < nthreads) |
560 |
wanted = nthreads; |
561 |
} |
562 |
|
563 |
static void max_parallel (int nthreads) |
564 |
{ |
565 |
int cur = started; |
566 |
|
567 |
if (wanted > nthreads) |
568 |
wanted = nthreads; |
569 |
|
570 |
while (cur > wanted) |
571 |
{ |
572 |
end_thread (); |
573 |
cur--; |
574 |
} |
575 |
|
576 |
while (started > wanted) |
577 |
{ |
578 |
poll_wait (); |
579 |
poll_cb (); |
580 |
} |
581 |
} |
582 |
|
583 |
static void create_pipe () |
584 |
{ |
585 |
if (pipe (respipe)) |
586 |
croak ("unable to initialize result pipe"); |
587 |
|
588 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
589 |
croak ("cannot set result pipe to nonblocking mode"); |
590 |
|
591 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
592 |
croak ("cannot set result pipe to nonblocking mode"); |
593 |
} |
594 |
|
595 |
/*****************************************************************************/ |
596 |
/* work around various missing functions */ |
597 |
|
598 |
#if !HAVE_PREADWRITE |
599 |
# define pread aio_pread |
600 |
# define pwrite aio_pwrite |
601 |
|
602 |
/* |
603 |
* make our pread/pwrite safe against themselves, but not against |
604 |
* normal read/write by using a mutex. slows down execution a lot, |
605 |
* but that's your problem, not mine. |
606 |
*/ |
607 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
608 |
|
609 |
static ssize_t pread (int fd, void *buf, size_t count, off_t offset) |
610 |
{ |
611 |
ssize_t res; |
612 |
off_t ooffset; |
613 |
|
614 |
pthread_mutex_lock (&preadwritelock); |
615 |
ooffset = lseek (fd, 0, SEEK_CUR); |
616 |
lseek (fd, offset, SEEK_SET); |
617 |
res = read (fd, buf, count); |
618 |
lseek (fd, ooffset, SEEK_SET); |
619 |
pthread_mutex_unlock (&preadwritelock); |
620 |
|
621 |
return res; |
622 |
} |
623 |
|
624 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
625 |
{ |
626 |
ssize_t res; |
627 |
off_t ooffset; |
628 |
|
629 |
pthread_mutex_lock (&preadwritelock); |
630 |
ooffset = lseek (fd, 0, SEEK_CUR); |
631 |
lseek (fd, offset, SEEK_SET); |
632 |
res = write (fd, buf, count); |
633 |
lseek (fd, offset, SEEK_SET); |
634 |
pthread_mutex_unlock (&preadwritelock); |
635 |
|
636 |
return res; |
637 |
} |
638 |
#endif |
639 |
|
640 |
#if !HAVE_FDATASYNC |
641 |
# define fdatasync fsync |
642 |
#endif |
643 |
|
644 |
#if !HAVE_READAHEAD |
645 |
# define readahead aio_readahead |
646 |
|
647 |
static ssize_t readahead (int fd, off_t offset, size_t count) |
648 |
{ |
649 |
dBUF; |
650 |
|
651 |
while (count > 0) |
652 |
{ |
653 |
size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE; |
654 |
|
655 |
pread (fd, aio_buf, len, offset); |
656 |
offset += len; |
657 |
count -= len; |
658 |
} |
659 |
|
660 |
fBUF; |
661 |
|
662 |
errno = 0; |
663 |
} |
664 |
#endif |
665 |
|
666 |
#if !HAVE_READDIR_R |
667 |
# define readdir_r aio_readdir_r |
668 |
|
669 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
670 |
|
671 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
672 |
{ |
673 |
struct dirent *e; |
674 |
int errorno; |
675 |
|
676 |
pthread_mutex_lock (&readdirlock); |
677 |
|
678 |
e = readdir (dirp); |
679 |
errorno = errno; |
680 |
|
681 |
if (e) |
682 |
{ |
683 |
*res = ent; |
684 |
strcpy (ent->d_name, e->d_name); |
685 |
} |
686 |
else |
687 |
*res = 0; |
688 |
|
689 |
pthread_mutex_unlock (&readdirlock); |
690 |
|
691 |
errno = errorno; |
692 |
return e ? 0 : -1; |
693 |
} |
694 |
#endif |
695 |
|
696 |
/* sendfile always needs emulation */ |
697 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count) |
698 |
{ |
699 |
ssize_t res; |
700 |
|
701 |
if (!count) |
702 |
return 0; |
703 |
|
704 |
#if HAVE_SENDFILE |
705 |
# if __linux |
706 |
res = sendfile (ofd, ifd, &offset, count); |
707 |
|
708 |
# elif __freebsd |
709 |
/* |
710 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
711 |
* wasted on making it similar to other I/O functions. |
712 |
*/ |
713 |
{ |
714 |
off_t sbytes; |
715 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
716 |
|
717 |
if (res < 0 && sbytes) |
718 |
/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */ |
719 |
res = sbytes; |
720 |
} |
721 |
|
722 |
# elif __hpux |
723 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
724 |
|
725 |
# elif __solaris |
726 |
{ |
727 |
struct sendfilevec vec; |
728 |
size_t sbytes; |
729 |
|
730 |
vec.sfv_fd = ifd; |
731 |
vec.sfv_flag = 0; |
732 |
vec.sfv_off = offset; |
733 |
vec.sfv_len = count; |
734 |
|
735 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
736 |
|
737 |
if (res < 0 && sbytes) |
738 |
res = sbytes; |
739 |
} |
740 |
|
741 |
# endif |
742 |
#else |
743 |
res = -1; |
744 |
errno = ENOSYS; |
745 |
#endif |
746 |
|
747 |
if (res < 0 |
748 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
749 |
#if __solaris |
750 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
751 |
#endif |
752 |
) |
753 |
) |
754 |
{ |
755 |
/* emulate sendfile. this is a major pain in the ass */ |
756 |
dBUF; |
757 |
|
758 |
res = 0; |
759 |
|
760 |
while (count) |
761 |
{ |
762 |
ssize_t cnt; |
763 |
|
764 |
cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset); |
765 |
|
766 |
if (cnt <= 0) |
767 |
{ |
768 |
if (cnt && !res) res = -1; |
769 |
break; |
770 |
} |
771 |
|
772 |
cnt = write (ofd, aio_buf, cnt); |
773 |
|
774 |
if (cnt <= 0) |
775 |
{ |
776 |
if (cnt && !res) res = -1; |
777 |
break; |
778 |
} |
779 |
|
780 |
offset += cnt; |
781 |
res += cnt; |
782 |
count -= cnt; |
783 |
} |
784 |
|
785 |
fBUF; |
786 |
} |
787 |
|
788 |
return res; |
789 |
} |
790 |
|
791 |
/* read a full directory */ |
792 |
static int scandir_ (const char *path, void **namesp) |
793 |
{ |
794 |
DIR *dirp; |
795 |
union |
796 |
{ |
797 |
struct dirent d; |
798 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
799 |
} *u; |
800 |
struct dirent *entp; |
801 |
char *name, *names; |
802 |
int memlen = 4096; |
803 |
int memofs = 0; |
804 |
int res = 0; |
805 |
int errorno; |
806 |
|
807 |
dirp = opendir (path); |
808 |
if (!dirp) |
809 |
return -1; |
810 |
|
811 |
u = malloc (sizeof (*u)); |
812 |
names = malloc (memlen); |
813 |
|
814 |
if (u && names) |
815 |
for (;;) |
816 |
{ |
817 |
errno = 0; |
818 |
readdir_r (dirp, &u->d, &entp); |
819 |
|
820 |
if (!entp) |
821 |
break; |
822 |
|
823 |
name = entp->d_name; |
824 |
|
825 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
826 |
{ |
827 |
int len = strlen (name) + 1; |
828 |
|
829 |
res++; |
830 |
|
831 |
while (memofs + len > memlen) |
832 |
{ |
833 |
memlen *= 2; |
834 |
names = realloc (names, memlen); |
835 |
if (!names) |
836 |
break; |
837 |
} |
838 |
|
839 |
memcpy (names + memofs, name, len); |
840 |
memofs += len; |
841 |
} |
842 |
} |
843 |
|
844 |
errorno = errno; |
845 |
free (u); |
846 |
closedir (dirp); |
847 |
|
848 |
if (errorno) |
849 |
{ |
850 |
free (names); |
851 |
errno = errorno; |
852 |
res = -1; |
853 |
} |
854 |
|
855 |
*namesp = (void *)names; |
856 |
return res; |
857 |
} |
858 |
|
859 |
/*****************************************************************************/ |
860 |
|
861 |
static void *aio_proc (void *thr_arg) |
862 |
{ |
863 |
aio_req req; |
864 |
int type; |
865 |
|
866 |
do |
867 |
{ |
868 |
pthread_mutex_lock (&reqlock); |
869 |
|
870 |
for (;;) |
871 |
{ |
872 |
req = reqq_shift (&req_queue); |
873 |
|
874 |
if (req) |
875 |
break; |
876 |
|
877 |
pthread_cond_wait (&reqwait, &reqlock); |
878 |
} |
879 |
|
880 |
pthread_mutex_unlock (&reqlock); |
881 |
|
882 |
errno = 0; /* strictly unnecessary */ |
883 |
type = req->type; /* remember type for QUIT check */ |
884 |
|
885 |
if (!(req->flags & FLAG_CANCELLED)) |
886 |
switch (type) |
887 |
{ |
888 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
889 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
890 |
|
891 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
892 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break; |
893 |
|
894 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
895 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
896 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
897 |
|
898 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
899 |
case REQ_CLOSE: req->result = close (req->fd); break; |
900 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
901 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
902 |
case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; |
903 |
case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; |
904 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
905 |
|
906 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
907 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
908 |
case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break; |
909 |
|
910 |
case REQ_SLEEP: |
911 |
{ |
912 |
struct timeval tv; |
913 |
|
914 |
tv.tv_sec = req->fd; |
915 |
tv.tv_usec = req->fd2; |
916 |
|
917 |
req->result = select (0, 0, 0, 0, &tv); |
918 |
} |
919 |
|
920 |
case REQ_GROUP: |
921 |
case REQ_NOP: |
922 |
case REQ_QUIT: |
923 |
break; |
924 |
|
925 |
default: |
926 |
req->result = ENOSYS; |
927 |
break; |
928 |
} |
929 |
|
930 |
req->errorno = errno; |
931 |
|
932 |
pthread_mutex_lock (&reslock); |
933 |
|
934 |
if (!reqq_push (&res_queue, req)) |
935 |
/* write a dummy byte to the pipe so fh becomes ready */ |
936 |
write (respipe [1], &respipe, 1); |
937 |
|
938 |
pthread_mutex_unlock (&reslock); |
939 |
} |
940 |
while (type != REQ_QUIT); |
941 |
|
942 |
return 0; |
943 |
} |
944 |
|
945 |
/*****************************************************************************/ |
946 |
|
947 |
static void atfork_prepare (void) |
948 |
{ |
949 |
pthread_mutex_lock (&reqlock); |
950 |
pthread_mutex_lock (&reslock); |
951 |
#if !HAVE_PREADWRITE |
952 |
pthread_mutex_lock (&preadwritelock); |
953 |
#endif |
954 |
#if !HAVE_READDIR_R |
955 |
pthread_mutex_lock (&readdirlock); |
956 |
#endif |
957 |
} |
958 |
|
959 |
static void atfork_parent (void) |
960 |
{ |
961 |
#if !HAVE_READDIR_R |
962 |
pthread_mutex_unlock (&readdirlock); |
963 |
#endif |
964 |
#if !HAVE_PREADWRITE |
965 |
pthread_mutex_unlock (&preadwritelock); |
966 |
#endif |
967 |
pthread_mutex_unlock (&reslock); |
968 |
pthread_mutex_unlock (&reqlock); |
969 |
} |
970 |
|
971 |
static void atfork_child (void) |
972 |
{ |
973 |
aio_req prv; |
974 |
|
975 |
started = 0; |
976 |
|
977 |
while (prv = reqq_shift (&req_queue)) |
978 |
req_free (prv); |
979 |
|
980 |
while (prv = reqq_shift (&res_queue)) |
981 |
req_free (prv); |
982 |
|
983 |
close (respipe [0]); |
984 |
close (respipe [1]); |
985 |
create_pipe (); |
986 |
|
987 |
atfork_parent (); |
988 |
} |
989 |
|
990 |
#define dREQ \ |
991 |
aio_req req; \ |
992 |
int req_pri = next_pri; \ |
993 |
next_pri = DEFAULT_PRI + PRI_BIAS; \ |
994 |
\ |
995 |
if (SvOK (callback) && !SvROK (callback)) \ |
996 |
croak ("callback must be undef or of reference type"); \ |
997 |
\ |
998 |
Newz (0, req, 1, aio_cb); \ |
999 |
if (!req) \ |
1000 |
croak ("out of memory during aio_req allocation"); \ |
1001 |
\ |
1002 |
req->callback = newSVsv (callback); \ |
1003 |
req->pri = req_pri |
1004 |
|
1005 |
#define REQ_SEND \ |
1006 |
req_send (req); \ |
1007 |
\ |
1008 |
if (GIMME_V != G_VOID) \ |
1009 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
1010 |
|
1011 |
MODULE = IO::AIO PACKAGE = IO::AIO |
1012 |
|
1013 |
PROTOTYPES: ENABLE |
1014 |
|
1015 |
BOOT: |
1016 |
{ |
1017 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
1018 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
1019 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
1020 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
1021 |
|
1022 |
create_pipe (); |
1023 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
1024 |
} |
1025 |
|
1026 |
void |
1027 |
min_parallel (nthreads) |
1028 |
int nthreads |
1029 |
PROTOTYPE: $ |
1030 |
|
1031 |
void |
1032 |
max_parallel (nthreads) |
1033 |
int nthreads |
1034 |
PROTOTYPE: $ |
1035 |
|
1036 |
int |
1037 |
max_outstanding (nreqs) |
1038 |
int nreqs |
1039 |
PROTOTYPE: $ |
1040 |
CODE: |
1041 |
RETVAL = max_outstanding; |
1042 |
max_outstanding = nreqs; |
1043 |
|
1044 |
void |
1045 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
1046 |
SV * pathname |
1047 |
int flags |
1048 |
int mode |
1049 |
SV * callback |
1050 |
PROTOTYPE: $$$;$ |
1051 |
PPCODE: |
1052 |
{ |
1053 |
dREQ; |
1054 |
|
1055 |
req->type = REQ_OPEN; |
1056 |
req->data = newSVsv (pathname); |
1057 |
req->dataptr = SvPVbyte_nolen (req->data); |
1058 |
req->fd = flags; |
1059 |
req->mode = mode; |
1060 |
|
1061 |
REQ_SEND; |
1062 |
} |
1063 |
|
1064 |
void |
1065 |
aio_close (fh,callback=&PL_sv_undef) |
1066 |
SV * fh |
1067 |
SV * callback |
1068 |
PROTOTYPE: $;$ |
1069 |
ALIAS: |
1070 |
aio_close = REQ_CLOSE |
1071 |
aio_fsync = REQ_FSYNC |
1072 |
aio_fdatasync = REQ_FDATASYNC |
1073 |
PPCODE: |
1074 |
{ |
1075 |
dREQ; |
1076 |
|
1077 |
req->type = ix; |
1078 |
req->fh = newSVsv (fh); |
1079 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1080 |
|
1081 |
REQ_SEND (req); |
1082 |
} |
1083 |
|
1084 |
void |
1085 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
1086 |
SV * fh |
1087 |
UV offset |
1088 |
UV length |
1089 |
SV * data |
1090 |
UV dataoffset |
1091 |
SV * callback |
1092 |
ALIAS: |
1093 |
aio_read = REQ_READ |
1094 |
aio_write = REQ_WRITE |
1095 |
PROTOTYPE: $$$$$;$ |
1096 |
PPCODE: |
1097 |
{ |
1098 |
aio_req req; |
1099 |
STRLEN svlen; |
1100 |
char *svptr = SvPVbyte (data, svlen); |
1101 |
|
1102 |
SvUPGRADE (data, SVt_PV); |
1103 |
SvPOK_on (data); |
1104 |
|
1105 |
if (dataoffset < 0) |
1106 |
dataoffset += svlen; |
1107 |
|
1108 |
if (dataoffset < 0 || dataoffset > svlen) |
1109 |
croak ("data offset outside of string"); |
1110 |
|
1111 |
if (ix == REQ_WRITE) |
1112 |
{ |
1113 |
/* write: check length and adjust. */ |
1114 |
if (length < 0 || length + dataoffset > svlen) |
1115 |
length = svlen - dataoffset; |
1116 |
} |
1117 |
else |
1118 |
{ |
1119 |
/* read: grow scalar as necessary */ |
1120 |
svptr = SvGROW (data, length + dataoffset); |
1121 |
} |
1122 |
|
1123 |
if (length < 0) |
1124 |
croak ("length must not be negative"); |
1125 |
|
1126 |
{ |
1127 |
dREQ; |
1128 |
|
1129 |
req->type = ix; |
1130 |
req->fh = newSVsv (fh); |
1131 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
1132 |
: IoOFP (sv_2io (fh))); |
1133 |
req->offset = offset; |
1134 |
req->length = length; |
1135 |
req->data = SvREFCNT_inc (data); |
1136 |
req->dataptr = (char *)svptr + dataoffset; |
1137 |
|
1138 |
if (!SvREADONLY (data)) |
1139 |
{ |
1140 |
SvREADONLY_on (data); |
1141 |
req->data2ptr = (void *)data; |
1142 |
} |
1143 |
|
1144 |
REQ_SEND; |
1145 |
} |
1146 |
} |
1147 |
|
1148 |
void |
1149 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
1150 |
SV * out_fh |
1151 |
SV * in_fh |
1152 |
UV in_offset |
1153 |
UV length |
1154 |
SV * callback |
1155 |
PROTOTYPE: $$$$;$ |
1156 |
PPCODE: |
1157 |
{ |
1158 |
dREQ; |
1159 |
|
1160 |
req->type = REQ_SENDFILE; |
1161 |
req->fh = newSVsv (out_fh); |
1162 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
1163 |
req->fh2 = newSVsv (in_fh); |
1164 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
1165 |
req->offset = in_offset; |
1166 |
req->length = length; |
1167 |
|
1168 |
REQ_SEND; |
1169 |
} |
1170 |
|
1171 |
void |
1172 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
1173 |
SV * fh |
1174 |
UV offset |
1175 |
IV length |
1176 |
SV * callback |
1177 |
PROTOTYPE: $$$;$ |
1178 |
PPCODE: |
1179 |
{ |
1180 |
dREQ; |
1181 |
|
1182 |
req->type = REQ_READAHEAD; |
1183 |
req->fh = newSVsv (fh); |
1184 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1185 |
req->offset = offset; |
1186 |
req->length = length; |
1187 |
|
1188 |
REQ_SEND; |
1189 |
} |
1190 |
|
1191 |
void |
1192 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
1193 |
SV * fh_or_path |
1194 |
SV * callback |
1195 |
ALIAS: |
1196 |
aio_stat = REQ_STAT |
1197 |
aio_lstat = REQ_LSTAT |
1198 |
PPCODE: |
1199 |
{ |
1200 |
dREQ; |
1201 |
|
1202 |
New (0, req->statdata, 1, Stat_t); |
1203 |
if (!req->statdata) |
1204 |
{ |
1205 |
req_free (req); |
1206 |
croak ("out of memory during aio_req->statdata allocation"); |
1207 |
} |
1208 |
|
1209 |
if (SvPOK (fh_or_path)) |
1210 |
{ |
1211 |
req->type = ix; |
1212 |
req->data = newSVsv (fh_or_path); |
1213 |
req->dataptr = SvPVbyte_nolen (req->data); |
1214 |
} |
1215 |
else |
1216 |
{ |
1217 |
req->type = REQ_FSTAT; |
1218 |
req->fh = newSVsv (fh_or_path); |
1219 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1220 |
} |
1221 |
|
1222 |
REQ_SEND; |
1223 |
} |
1224 |
|
1225 |
void |
1226 |
aio_unlink (pathname,callback=&PL_sv_undef) |
1227 |
SV * pathname |
1228 |
SV * callback |
1229 |
ALIAS: |
1230 |
aio_unlink = REQ_UNLINK |
1231 |
aio_rmdir = REQ_RMDIR |
1232 |
aio_readdir = REQ_READDIR |
1233 |
PPCODE: |
1234 |
{ |
1235 |
dREQ; |
1236 |
|
1237 |
req->type = ix; |
1238 |
req->data = newSVsv (pathname); |
1239 |
req->dataptr = SvPVbyte_nolen (req->data); |
1240 |
|
1241 |
REQ_SEND; |
1242 |
} |
1243 |
|
1244 |
void |
1245 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
1246 |
SV * oldpath |
1247 |
SV * newpath |
1248 |
SV * callback |
1249 |
ALIAS: |
1250 |
aio_link = REQ_LINK |
1251 |
aio_symlink = REQ_SYMLINK |
1252 |
aio_rename = REQ_RENAME |
1253 |
PPCODE: |
1254 |
{ |
1255 |
dREQ; |
1256 |
|
1257 |
req->type = ix; |
1258 |
req->fh = newSVsv (oldpath); |
1259 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
1260 |
req->data = newSVsv (newpath); |
1261 |
req->dataptr = SvPVbyte_nolen (req->data); |
1262 |
|
1263 |
REQ_SEND; |
1264 |
} |
1265 |
|
1266 |
void |
1267 |
aio_sleep (delay,callback=&PL_sv_undef) |
1268 |
double delay |
1269 |
SV * callback |
1270 |
PPCODE: |
1271 |
{ |
1272 |
dREQ; |
1273 |
|
1274 |
req->type = REQ_SLEEP; |
1275 |
req->fd = delay < 0. ? 0 : delay; |
1276 |
req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd); |
1277 |
|
1278 |
REQ_SEND; |
1279 |
} |
1280 |
|
1281 |
void |
1282 |
aio_group (callback=&PL_sv_undef) |
1283 |
SV * callback |
1284 |
PROTOTYPE: ;$ |
1285 |
PPCODE: |
1286 |
{ |
1287 |
dREQ; |
1288 |
|
1289 |
req->type = REQ_GROUP; |
1290 |
req_send (req); |
1291 |
|
1292 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
1293 |
} |
1294 |
|
1295 |
void |
1296 |
aio_nop (callback=&PL_sv_undef) |
1297 |
SV * callback |
1298 |
PPCODE: |
1299 |
{ |
1300 |
dREQ; |
1301 |
|
1302 |
req->type = REQ_NOP; |
1303 |
|
1304 |
REQ_SEND; |
1305 |
} |
1306 |
|
1307 |
void |
1308 |
aioreq_pri (int pri = DEFAULT_PRI) |
1309 |
CODE: |
1310 |
if (pri < PRI_MIN) pri = PRI_MIN; |
1311 |
if (pri > PRI_MAX) pri = PRI_MAX; |
1312 |
next_pri = pri + PRI_BIAS; |
1313 |
|
1314 |
void |
1315 |
flush () |
1316 |
PROTOTYPE: |
1317 |
CODE: |
1318 |
while (nreqs) |
1319 |
{ |
1320 |
poll_wait (); |
1321 |
poll_cb (); |
1322 |
} |
1323 |
|
1324 |
void |
1325 |
poll() |
1326 |
PROTOTYPE: |
1327 |
CODE: |
1328 |
if (nreqs) |
1329 |
{ |
1330 |
poll_wait (); |
1331 |
poll_cb (); |
1332 |
} |
1333 |
|
1334 |
int |
1335 |
poll_fileno() |
1336 |
PROTOTYPE: |
1337 |
CODE: |
1338 |
RETVAL = respipe [0]; |
1339 |
OUTPUT: |
1340 |
RETVAL |
1341 |
|
1342 |
int |
1343 |
poll_cb(...) |
1344 |
PROTOTYPE: |
1345 |
CODE: |
1346 |
RETVAL = poll_cb (); |
1347 |
OUTPUT: |
1348 |
RETVAL |
1349 |
|
1350 |
void |
1351 |
poll_wait() |
1352 |
PROTOTYPE: |
1353 |
CODE: |
1354 |
if (nreqs) |
1355 |
poll_wait (); |
1356 |
|
1357 |
int |
1358 |
nreqs() |
1359 |
PROTOTYPE: |
1360 |
CODE: |
1361 |
RETVAL = nreqs; |
1362 |
OUTPUT: |
1363 |
RETVAL |
1364 |
|
1365 |
PROTOTYPES: DISABLE |
1366 |
|
1367 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
1368 |
|
1369 |
void |
1370 |
cancel (aio_req_ornot req) |
1371 |
CODE: |
1372 |
req_cancel (req); |
1373 |
|
1374 |
void |
1375 |
cb (aio_req_ornot req, SV *callback=&PL_sv_undef) |
1376 |
CODE: |
1377 |
SvREFCNT_dec (req->callback); |
1378 |
req->callback = newSVsv (callback); |
1379 |
|
1380 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
1381 |
|
1382 |
void |
1383 |
add (aio_req grp, ...) |
1384 |
PPCODE: |
1385 |
{ |
1386 |
int i; |
1387 |
aio_req req; |
1388 |
|
1389 |
if (grp->fd == 2) |
1390 |
croak ("cannot add requests to IO::AIO::GRP after the group finished"); |
1391 |
|
1392 |
for (i = 1; i < items; ++i ) |
1393 |
{ |
1394 |
if (GIMME_V != G_VOID) |
1395 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
1396 |
|
1397 |
req = SvAIO_REQ (ST (i)); |
1398 |
|
1399 |
if (req) |
1400 |
{ |
1401 |
++grp->length; |
1402 |
req->grp = grp; |
1403 |
|
1404 |
req->grp_prev = 0; |
1405 |
req->grp_next = grp->grp_first; |
1406 |
|
1407 |
if (grp->grp_first) |
1408 |
grp->grp_first->grp_prev = req; |
1409 |
|
1410 |
grp->grp_first = req; |
1411 |
} |
1412 |
} |
1413 |
} |
1414 |
|
1415 |
void |
1416 |
result (aio_req grp, ...) |
1417 |
CODE: |
1418 |
{ |
1419 |
int i; |
1420 |
AV *av = newAV (); |
1421 |
|
1422 |
for (i = 1; i < items; ++i ) |
1423 |
av_push (av, newSVsv (ST (i))); |
1424 |
|
1425 |
SvREFCNT_dec (grp->data); |
1426 |
grp->data = (SV *)av; |
1427 |
} |
1428 |
|
1429 |
void |
1430 |
limit (aio_req grp, int limit) |
1431 |
CODE: |
1432 |
grp->fd2 = limit; |
1433 |
aio_grp_feed (grp); |
1434 |
|
1435 |
void |
1436 |
feed (aio_req grp, SV *callback=&PL_sv_undef) |
1437 |
CODE: |
1438 |
{ |
1439 |
SvREFCNT_dec (grp->fh2); |
1440 |
grp->fh2 = newSVsv (callback); |
1441 |
|
1442 |
if (grp->fd2 <= 0) |
1443 |
grp->fd2 = 2; |
1444 |
|
1445 |
aio_grp_feed (grp); |
1446 |
} |
1447 |
|