1 |
#define _REENTRANT 1 |
2 |
#include <errno.h> |
3 |
|
4 |
#include "EXTERN.h" |
5 |
#include "perl.h" |
6 |
#include "XSUB.h" |
7 |
|
8 |
#include "autoconf/config.h" |
9 |
|
10 |
#include <pthread.h> |
11 |
|
12 |
#include <sys/types.h> |
13 |
#include <sys/stat.h> |
14 |
|
15 |
#include <unistd.h> |
16 |
#include <fcntl.h> |
17 |
#include <signal.h> |
18 |
#include <sched.h> |
19 |
|
20 |
#if HAVE_SENDFILE |
21 |
# if __linux |
22 |
# include <sys/sendfile.h> |
23 |
# elif __freebsd |
24 |
# include <sys/socket.h> |
25 |
# include <sys/uio.h> |
26 |
# elif __hpux |
27 |
# include <sys/socket.h> |
28 |
# elif __solaris /* not yet */ |
29 |
# include <sys/sendfile.h> |
30 |
# else |
31 |
# error sendfile support requested but not available |
32 |
# endif |
33 |
#endif |
34 |
|
35 |
#if __ia64 |
36 |
# define STACKSIZE 65536 |
37 |
#else |
38 |
# define STACKSIZE 4096 |
39 |
#endif |
40 |
|
41 |
enum { |
42 |
REQ_QUIT, |
43 |
REQ_OPEN, REQ_CLOSE, |
44 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
45 |
REQ_SENDFILE, |
46 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
47 |
REQ_FSYNC, REQ_FDATASYNC, |
48 |
REQ_UNLINK, REQ_RMDIR, |
49 |
REQ_SYMLINK, |
50 |
}; |
51 |
|
52 |
typedef struct aio_cb { |
53 |
struct aio_cb *volatile next; |
54 |
|
55 |
int type; |
56 |
|
57 |
int fd, fd2; |
58 |
off_t offset; |
59 |
size_t length; |
60 |
ssize_t result; |
61 |
mode_t mode; /* open */ |
62 |
int errorno; |
63 |
SV *data, *callback; |
64 |
SV *fh, *fh2; |
65 |
void *dataptr, *data2ptr; |
66 |
STRLEN dataoffset; |
67 |
|
68 |
Stat_t *statdata; |
69 |
} aio_cb; |
70 |
|
71 |
typedef aio_cb *aio_req; |
72 |
|
73 |
static int started, wanted; |
74 |
static volatile int nreqs; |
75 |
static int max_outstanding = 1<<30; |
76 |
static int respipe [2]; |
77 |
|
78 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
79 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
80 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
81 |
|
82 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
83 |
static volatile aio_req ress, rese; /* queue start, queue end */ |
84 |
|
85 |
static void free_req (aio_req req) |
86 |
{ |
87 |
if (req->data) |
88 |
SvREFCNT_dec (req->data); |
89 |
|
90 |
if (req->fh) |
91 |
SvREFCNT_dec (req->fh); |
92 |
|
93 |
if (req->fh2) |
94 |
SvREFCNT_dec (req->fh2); |
95 |
|
96 |
if (req->statdata) |
97 |
Safefree (req->statdata); |
98 |
|
99 |
if (req->callback) |
100 |
SvREFCNT_dec (req->callback); |
101 |
|
102 |
Safefree (req); |
103 |
} |
104 |
|
105 |
static void |
106 |
poll_wait () |
107 |
{ |
108 |
if (nreqs && !ress) |
109 |
{ |
110 |
fd_set rfd; |
111 |
FD_ZERO(&rfd); |
112 |
FD_SET(respipe [0], &rfd); |
113 |
|
114 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
115 |
} |
116 |
} |
117 |
|
118 |
static int |
119 |
poll_cb () |
120 |
{ |
121 |
dSP; |
122 |
int count = 0; |
123 |
int do_croak = 0; |
124 |
aio_req req; |
125 |
|
126 |
for (;;) |
127 |
{ |
128 |
pthread_mutex_lock (&reslock); |
129 |
req = ress; |
130 |
|
131 |
if (req) |
132 |
{ |
133 |
ress = req->next; |
134 |
|
135 |
if (!ress) |
136 |
{ |
137 |
/* read any signals sent by the worker threads */ |
138 |
char buf [32]; |
139 |
while (read (respipe [0], buf, 32) == 32) |
140 |
; |
141 |
|
142 |
rese = 0; |
143 |
} |
144 |
} |
145 |
|
146 |
pthread_mutex_unlock (&reslock); |
147 |
|
148 |
if (!req) |
149 |
break; |
150 |
|
151 |
nreqs--; |
152 |
|
153 |
if (req->type == REQ_QUIT) |
154 |
started--; |
155 |
else |
156 |
{ |
157 |
int errorno = errno; |
158 |
errno = req->errorno; |
159 |
|
160 |
if (req->type == REQ_READ) |
161 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
162 |
|
163 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
164 |
SvREADONLY_off (req->data); |
165 |
|
166 |
if (req->statdata) |
167 |
{ |
168 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
169 |
PL_laststatval = req->result; |
170 |
PL_statcache = *(req->statdata); |
171 |
} |
172 |
|
173 |
ENTER; |
174 |
PUSHMARK (SP); |
175 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
176 |
|
177 |
if (req->type == REQ_OPEN) |
178 |
{ |
179 |
/* convert fd to fh */ |
180 |
SV *fh; |
181 |
|
182 |
PUTBACK; |
183 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
184 |
SPAGAIN; |
185 |
|
186 |
fh = SvREFCNT_inc (POPs); |
187 |
|
188 |
PUSHMARK (SP); |
189 |
XPUSHs (sv_2mortal (fh)); |
190 |
} |
191 |
|
192 |
if (SvOK (req->callback)) |
193 |
{ |
194 |
PUTBACK; |
195 |
call_sv (req->callback, G_VOID | G_EVAL); |
196 |
SPAGAIN; |
197 |
|
198 |
if (SvTRUE (ERRSV)) |
199 |
{ |
200 |
free_req (req); |
201 |
croak (0); |
202 |
} |
203 |
} |
204 |
|
205 |
LEAVE; |
206 |
|
207 |
errno = errorno; |
208 |
count++; |
209 |
} |
210 |
|
211 |
free_req (req); |
212 |
} |
213 |
|
214 |
return count; |
215 |
} |
216 |
|
217 |
static void *aio_proc(void *arg); |
218 |
|
219 |
static void |
220 |
start_thread (void) |
221 |
{ |
222 |
sigset_t fullsigset, oldsigset; |
223 |
pthread_t tid; |
224 |
pthread_attr_t attr; |
225 |
|
226 |
pthread_attr_init (&attr); |
227 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
228 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
229 |
|
230 |
sigfillset (&fullsigset); |
231 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
232 |
|
233 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
234 |
started++; |
235 |
|
236 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
237 |
} |
238 |
|
239 |
static void |
240 |
send_req (aio_req req) |
241 |
{ |
242 |
while (started < wanted && nreqs >= started) |
243 |
start_thread (); |
244 |
|
245 |
nreqs++; |
246 |
|
247 |
pthread_mutex_lock (&reqlock); |
248 |
|
249 |
req->next = 0; |
250 |
|
251 |
if (reqe) |
252 |
{ |
253 |
reqe->next = req; |
254 |
reqe = req; |
255 |
} |
256 |
else |
257 |
reqe = reqs = req; |
258 |
|
259 |
pthread_cond_signal (&reqwait); |
260 |
pthread_mutex_unlock (&reqlock); |
261 |
|
262 |
if (nreqs > max_outstanding) |
263 |
for (;;) |
264 |
{ |
265 |
poll_cb (); |
266 |
|
267 |
if (nreqs <= max_outstanding) |
268 |
break; |
269 |
|
270 |
poll_wait (); |
271 |
} |
272 |
} |
273 |
|
274 |
static void |
275 |
end_thread (void) |
276 |
{ |
277 |
aio_req req; |
278 |
Newz (0, req, 1, aio_cb); |
279 |
req->type = REQ_QUIT; |
280 |
|
281 |
send_req (req); |
282 |
} |
283 |
|
284 |
static void min_parallel (int nthreads) |
285 |
{ |
286 |
if (wanted < nthreads) |
287 |
wanted = nthreads; |
288 |
} |
289 |
|
290 |
static void max_parallel (int nthreads) |
291 |
{ |
292 |
int cur = started; |
293 |
|
294 |
if (wanted > nthreads) |
295 |
wanted = nthreads; |
296 |
|
297 |
while (cur > wanted) |
298 |
{ |
299 |
end_thread (); |
300 |
cur--; |
301 |
} |
302 |
|
303 |
while (started > wanted) |
304 |
{ |
305 |
poll_wait (); |
306 |
poll_cb (); |
307 |
} |
308 |
} |
309 |
|
310 |
static void create_pipe () |
311 |
{ |
312 |
if (pipe (respipe)) |
313 |
croak ("unable to initialize result pipe"); |
314 |
|
315 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
316 |
croak ("cannot set result pipe to nonblocking mode"); |
317 |
|
318 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
319 |
croak ("cannot set result pipe to nonblocking mode"); |
320 |
} |
321 |
|
322 |
static void atfork_prepare (void) |
323 |
{ |
324 |
pthread_mutex_lock (&reqlock); |
325 |
pthread_mutex_lock (&reslock); |
326 |
} |
327 |
|
328 |
static void atfork_parent (void) |
329 |
{ |
330 |
pthread_mutex_unlock (&reslock); |
331 |
pthread_mutex_unlock (&reqlock); |
332 |
} |
333 |
|
334 |
static void atfork_child (void) |
335 |
{ |
336 |
aio_req prv; |
337 |
|
338 |
started = 0; |
339 |
|
340 |
while (reqs) |
341 |
{ |
342 |
prv = reqs; |
343 |
reqs = prv->next; |
344 |
free_req (prv); |
345 |
} |
346 |
|
347 |
reqs = reqe = 0; |
348 |
|
349 |
while (ress) |
350 |
{ |
351 |
prv = ress; |
352 |
ress = prv->next; |
353 |
free_req (prv); |
354 |
} |
355 |
|
356 |
ress = rese = 0; |
357 |
|
358 |
close (respipe [0]); |
359 |
close (respipe [1]); |
360 |
create_pipe (); |
361 |
|
362 |
atfork_parent (); |
363 |
} |
364 |
|
365 |
/*****************************************************************************/ |
366 |
/* work around various missing functions */ |
367 |
|
368 |
#if !HAVE_PREADWRITE |
369 |
# define pread aio_pread |
370 |
# define pwrite aio_pwrite |
371 |
|
372 |
/* |
373 |
* make our pread/pwrite safe against themselves, but not against |
374 |
* normal read/write by using a mutex. slows down execution a lot, |
375 |
* but that's your problem, not mine. |
376 |
*/ |
377 |
static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; |
378 |
|
379 |
static ssize_t |
380 |
pread (int fd, void *buf, size_t count, off_t offset) |
381 |
{ |
382 |
ssize_t res; |
383 |
off_t ooffset; |
384 |
|
385 |
pthread_mutex_lock (&iolock); |
386 |
ooffset = lseek (fd, 0, SEEK_CUR); |
387 |
lseek (fd, offset, SEEK_SET); |
388 |
res = read (fd, buf, count); |
389 |
lseek (fd, ooffset, SEEK_SET); |
390 |
pthread_mutex_unlock (&iolock); |
391 |
|
392 |
return res; |
393 |
} |
394 |
|
395 |
static ssize_t |
396 |
pwrite (int fd, void *buf, size_t count, off_t offset) |
397 |
{ |
398 |
ssize_t res; |
399 |
off_t ooffset; |
400 |
|
401 |
pthread_mutex_lock (&iolock); |
402 |
ooffset = lseek (fd, 0, SEEK_CUR); |
403 |
lseek (fd, offset, SEEK_SET); |
404 |
res = write (fd, buf, count); |
405 |
lseek (fd, offset, SEEK_SET); |
406 |
pthread_mutex_unlock (&iolock); |
407 |
|
408 |
return res; |
409 |
} |
410 |
#endif |
411 |
|
412 |
#if !HAVE_FDATASYNC |
413 |
# define fdatasync fsync |
414 |
#endif |
415 |
|
416 |
#if !HAVE_READAHEAD |
417 |
# define readahead aio_readahead |
418 |
|
419 |
static char readahead_buf[4096]; |
420 |
|
421 |
static ssize_t |
422 |
readahead (int fd, off_t offset, size_t count) |
423 |
{ |
424 |
while (count > 0) |
425 |
{ |
426 |
size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); |
427 |
|
428 |
pread (fd, readahead_buf, len, offset); |
429 |
offset += len; |
430 |
count -= len; |
431 |
} |
432 |
|
433 |
errno = 0; |
434 |
} |
435 |
#endif |
436 |
|
437 |
/* sendfile always needs emulation */ |
438 |
static ssize_t |
439 |
sendfile_ (int ofd, int ifd, off_t offset, size_t count) |
440 |
{ |
441 |
ssize_t res; |
442 |
|
443 |
if (!count) |
444 |
return 0; |
445 |
|
446 |
#if HAVE_SENDFILE |
447 |
# if __linux |
448 |
res = sendfile (ofd, ifd, &offset, count); |
449 |
|
450 |
# elif __freebsd |
451 |
/* |
452 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
453 |
* wasted on making it similar to other I/O functions. |
454 |
*/ |
455 |
{ |
456 |
off_t sbytes; |
457 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
458 |
|
459 |
if (res < 0 && sbytes) |
460 |
/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */ |
461 |
res = sbytes; |
462 |
} |
463 |
|
464 |
# elif __hpux |
465 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
466 |
|
467 |
# elif __solaris |
468 |
{ |
469 |
struct sendfilevec vec; |
470 |
size_t sbytes; |
471 |
|
472 |
vec.sfv_fd = ifd; |
473 |
vec.sfv_flag = 0; |
474 |
vec.sfv_off = offset; |
475 |
vec.sfv_len = count; |
476 |
|
477 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
478 |
|
479 |
if (res < 0 && sbytes) |
480 |
res = sbytes; |
481 |
} |
482 |
|
483 |
# else |
484 |
res = -1; |
485 |
errno = ENOSYS; |
486 |
# endif |
487 |
#endif |
488 |
|
489 |
if (res < 0 |
490 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
491 |
#if __solaris |
492 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
493 |
#endif |
494 |
) |
495 |
) |
496 |
{ |
497 |
/* emulate sendfile. this is a major pain in the ass */ |
498 |
char *buf = malloc (4096); |
499 |
res = 0; |
500 |
|
501 |
for (;;) |
502 |
{ |
503 |
ssize_t cnt; |
504 |
|
505 |
cnt = pread (ifd, buf, 4096, offset); |
506 |
|
507 |
if (cnt <= 0) |
508 |
{ |
509 |
if (cnt && !res) res = -1; |
510 |
break; |
511 |
} |
512 |
|
513 |
cnt = write (ofd, buf, cnt); |
514 |
|
515 |
if (cnt <= 0) |
516 |
{ |
517 |
if (cnt && !res) res = -1; |
518 |
break; |
519 |
} |
520 |
|
521 |
offset += cnt; |
522 |
res += cnt; |
523 |
} |
524 |
|
525 |
{ |
526 |
int errorno = errno; |
527 |
free (buf); |
528 |
errno = errorno; |
529 |
} |
530 |
} |
531 |
|
532 |
return res; |
533 |
} |
534 |
|
535 |
/*****************************************************************************/ |
536 |
|
537 |
static void * |
538 |
aio_proc (void *thr_arg) |
539 |
{ |
540 |
aio_req req; |
541 |
int type; |
542 |
|
543 |
do |
544 |
{ |
545 |
pthread_mutex_lock (&reqlock); |
546 |
|
547 |
for (;;) |
548 |
{ |
549 |
req = reqs; |
550 |
|
551 |
if (reqs) |
552 |
{ |
553 |
reqs = reqs->next; |
554 |
if (!reqs) reqe = 0; |
555 |
} |
556 |
|
557 |
if (req) |
558 |
break; |
559 |
|
560 |
pthread_cond_wait (&reqwait, &reqlock); |
561 |
} |
562 |
|
563 |
pthread_mutex_unlock (&reqlock); |
564 |
|
565 |
errno = 0; /* strictly unnecessary */ |
566 |
|
567 |
type = req->type; |
568 |
|
569 |
switch (type) |
570 |
{ |
571 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
572 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
573 |
|
574 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
575 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break; |
576 |
|
577 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
578 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
579 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
580 |
|
581 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
582 |
case REQ_CLOSE: req->result = close (req->fd); break; |
583 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
584 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
585 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
586 |
|
587 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
588 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
589 |
|
590 |
case REQ_QUIT: |
591 |
break; |
592 |
|
593 |
default: |
594 |
req->result = ENOSYS; |
595 |
break; |
596 |
} |
597 |
|
598 |
req->errorno = errno; |
599 |
|
600 |
pthread_mutex_lock (&reslock); |
601 |
|
602 |
req->next = 0; |
603 |
|
604 |
if (rese) |
605 |
{ |
606 |
rese->next = req; |
607 |
rese = req; |
608 |
} |
609 |
else |
610 |
{ |
611 |
rese = ress = req; |
612 |
|
613 |
/* write a dummy byte to the pipe so fh becomes ready */ |
614 |
write (respipe [1], &respipe, 1); |
615 |
} |
616 |
|
617 |
pthread_mutex_unlock (&reslock); |
618 |
} |
619 |
while (type != REQ_QUIT); |
620 |
|
621 |
return 0; |
622 |
} |
623 |
|
624 |
#define dREQ \ |
625 |
aio_req req; \ |
626 |
\ |
627 |
if (SvOK (callback) && !SvROK (callback)) \ |
628 |
croak ("clalback must be undef or of reference type"); \ |
629 |
\ |
630 |
Newz (0, req, 1, aio_cb); \ |
631 |
if (!req) \ |
632 |
croak ("out of memory during aio_req allocation"); \ |
633 |
\ |
634 |
req->callback = newSVsv (callback); |
635 |
|
636 |
MODULE = IO::AIO PACKAGE = IO::AIO |
637 |
|
638 |
PROTOTYPES: ENABLE |
639 |
|
640 |
BOOT: |
641 |
{ |
642 |
create_pipe (); |
643 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
644 |
} |
645 |
|
646 |
void |
647 |
min_parallel(nthreads) |
648 |
int nthreads |
649 |
PROTOTYPE: $ |
650 |
|
651 |
void |
652 |
max_parallel(nthreads) |
653 |
int nthreads |
654 |
PROTOTYPE: $ |
655 |
|
656 |
int |
657 |
max_outstanding(nreqs) |
658 |
int nreqs |
659 |
PROTOTYPE: $ |
660 |
CODE: |
661 |
RETVAL = max_outstanding; |
662 |
max_outstanding = nreqs; |
663 |
|
664 |
void |
665 |
aio_open(pathname,flags,mode,callback=&PL_sv_undef) |
666 |
SV * pathname |
667 |
int flags |
668 |
int mode |
669 |
SV * callback |
670 |
PROTOTYPE: $$$;$ |
671 |
CODE: |
672 |
{ |
673 |
dREQ; |
674 |
|
675 |
req->type = REQ_OPEN; |
676 |
req->data = newSVsv (pathname); |
677 |
req->dataptr = SvPVbyte_nolen (req->data); |
678 |
req->fd = flags; |
679 |
req->mode = mode; |
680 |
|
681 |
send_req (req); |
682 |
} |
683 |
|
684 |
void |
685 |
aio_close(fh,callback=&PL_sv_undef) |
686 |
SV * fh |
687 |
SV * callback |
688 |
PROTOTYPE: $;$ |
689 |
ALIAS: |
690 |
aio_close = REQ_CLOSE |
691 |
aio_fsync = REQ_FSYNC |
692 |
aio_fdatasync = REQ_FDATASYNC |
693 |
CODE: |
694 |
{ |
695 |
dREQ; |
696 |
|
697 |
req->type = ix; |
698 |
req->fh = newSVsv (fh); |
699 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
700 |
|
701 |
send_req (req); |
702 |
} |
703 |
|
704 |
void |
705 |
aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
706 |
SV * fh |
707 |
UV offset |
708 |
UV length |
709 |
SV * data |
710 |
UV dataoffset |
711 |
SV * callback |
712 |
ALIAS: |
713 |
aio_read = REQ_READ |
714 |
aio_write = REQ_WRITE |
715 |
PROTOTYPE: $$$$$;$ |
716 |
CODE: |
717 |
{ |
718 |
aio_req req; |
719 |
STRLEN svlen; |
720 |
char *svptr = SvPVbyte (data, svlen); |
721 |
|
722 |
SvUPGRADE (data, SVt_PV); |
723 |
SvPOK_on (data); |
724 |
|
725 |
if (dataoffset < 0) |
726 |
dataoffset += svlen; |
727 |
|
728 |
if (dataoffset < 0 || dataoffset > svlen) |
729 |
croak ("data offset outside of string"); |
730 |
|
731 |
if (ix == REQ_WRITE) |
732 |
{ |
733 |
/* write: check length and adjust. */ |
734 |
if (length < 0 || length + dataoffset > svlen) |
735 |
length = svlen - dataoffset; |
736 |
} |
737 |
else |
738 |
{ |
739 |
/* read: grow scalar as necessary */ |
740 |
svptr = SvGROW (data, length + dataoffset); |
741 |
} |
742 |
|
743 |
if (length < 0) |
744 |
croak ("length must not be negative"); |
745 |
|
746 |
{ |
747 |
dREQ; |
748 |
|
749 |
req->type = ix; |
750 |
req->fh = newSVsv (fh); |
751 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
752 |
: IoOFP (sv_2io (fh))); |
753 |
req->offset = offset; |
754 |
req->length = length; |
755 |
req->data = SvREFCNT_inc (data); |
756 |
req->dataptr = (char *)svptr + dataoffset; |
757 |
|
758 |
if (!SvREADONLY (data)) |
759 |
{ |
760 |
SvREADONLY_on (data); |
761 |
req->data2ptr = (void *)data; |
762 |
} |
763 |
|
764 |
send_req (req); |
765 |
} |
766 |
} |
767 |
|
768 |
void |
769 |
aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
770 |
SV * out_fh |
771 |
SV * in_fh |
772 |
UV in_offset |
773 |
UV length |
774 |
SV * callback |
775 |
PROTOTYPE: $$$$;$ |
776 |
CODE: |
777 |
{ |
778 |
dREQ; |
779 |
|
780 |
req->type = REQ_SENDFILE; |
781 |
req->fh = newSVsv (out_fh); |
782 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
783 |
req->fh2 = newSVsv (in_fh); |
784 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
785 |
req->offset = in_offset; |
786 |
req->length = length; |
787 |
|
788 |
send_req (req); |
789 |
} |
790 |
|
791 |
void |
792 |
aio_readahead(fh,offset,length,callback=&PL_sv_undef) |
793 |
SV * fh |
794 |
UV offset |
795 |
IV length |
796 |
SV * callback |
797 |
PROTOTYPE: $$$;$ |
798 |
CODE: |
799 |
{ |
800 |
dREQ; |
801 |
|
802 |
req->type = REQ_READAHEAD; |
803 |
req->fh = newSVsv (fh); |
804 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
805 |
req->offset = offset; |
806 |
req->length = length; |
807 |
|
808 |
send_req (req); |
809 |
} |
810 |
|
811 |
void |
812 |
aio_stat(fh_or_path,callback=&PL_sv_undef) |
813 |
SV * fh_or_path |
814 |
SV * callback |
815 |
ALIAS: |
816 |
aio_stat = REQ_STAT |
817 |
aio_lstat = REQ_LSTAT |
818 |
CODE: |
819 |
{ |
820 |
dREQ; |
821 |
|
822 |
New (0, req->statdata, 1, Stat_t); |
823 |
if (!req->statdata) |
824 |
{ |
825 |
free_req (req); |
826 |
croak ("out of memory during aio_req->statdata allocation"); |
827 |
} |
828 |
|
829 |
if (SvPOK (fh_or_path)) |
830 |
{ |
831 |
req->type = ix; |
832 |
req->data = newSVsv (fh_or_path); |
833 |
req->dataptr = SvPVbyte_nolen (req->data); |
834 |
} |
835 |
else |
836 |
{ |
837 |
req->type = REQ_FSTAT; |
838 |
req->fh = newSVsv (fh_or_path); |
839 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
840 |
} |
841 |
|
842 |
send_req (req); |
843 |
} |
844 |
|
845 |
void |
846 |
aio_unlink(pathname,callback=&PL_sv_undef) |
847 |
SV * pathname |
848 |
SV * callback |
849 |
ALIAS: |
850 |
aio_unlink = REQ_UNLINK |
851 |
aio_rmdir = REQ_RMDIR |
852 |
CODE: |
853 |
{ |
854 |
dREQ; |
855 |
|
856 |
req->type = ix; |
857 |
req->data = newSVsv (pathname); |
858 |
req->dataptr = SvPVbyte_nolen (req->data); |
859 |
|
860 |
send_req (req); |
861 |
} |
862 |
|
863 |
void |
864 |
aio_symlink(oldpath,newpath,callback=&PL_sv_undef) |
865 |
SV * oldpath |
866 |
SV * newpath |
867 |
SV * callback |
868 |
CODE: |
869 |
{ |
870 |
dREQ; |
871 |
|
872 |
req->type = REQ_SYMLINK; |
873 |
req->fh = newSVsv (oldpath); |
874 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
875 |
req->data = newSVsv (newpath); |
876 |
req->dataptr = SvPVbyte_nolen (req->data); |
877 |
|
878 |
send_req (req); |
879 |
} |
880 |
|
881 |
void |
882 |
flush() |
883 |
PROTOTYPE: |
884 |
CODE: |
885 |
while (nreqs) |
886 |
{ |
887 |
poll_wait (); |
888 |
poll_cb (); |
889 |
} |
890 |
|
891 |
void |
892 |
poll() |
893 |
PROTOTYPE: |
894 |
CODE: |
895 |
if (nreqs) |
896 |
{ |
897 |
poll_wait (); |
898 |
poll_cb (); |
899 |
} |
900 |
|
901 |
int |
902 |
poll_fileno() |
903 |
PROTOTYPE: |
904 |
CODE: |
905 |
RETVAL = respipe [0]; |
906 |
OUTPUT: |
907 |
RETVAL |
908 |
|
909 |
int |
910 |
poll_cb(...) |
911 |
PROTOTYPE: |
912 |
CODE: |
913 |
RETVAL = poll_cb (); |
914 |
OUTPUT: |
915 |
RETVAL |
916 |
|
917 |
void |
918 |
poll_wait() |
919 |
PROTOTYPE: |
920 |
CODE: |
921 |
if (nreqs) |
922 |
poll_wait (); |
923 |
|
924 |
int |
925 |
nreqs() |
926 |
PROTOTYPE: |
927 |
CODE: |
928 |
RETVAL = nreqs; |
929 |
OUTPUT: |
930 |
RETVAL |
931 |
|