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 <stddef.h> |
13 |
#include <errno.h> |
14 |
#include <sys/types.h> |
15 |
#include <sys/stat.h> |
16 |
#include <limits.h> |
17 |
#include <unistd.h> |
18 |
#include <fcntl.h> |
19 |
#include <signal.h> |
20 |
#include <sched.h> |
21 |
|
22 |
#if HAVE_SENDFILE |
23 |
# if __linux |
24 |
# include <sys/sendfile.h> |
25 |
# elif __freebsd |
26 |
# include <sys/socket.h> |
27 |
# include <sys/uio.h> |
28 |
# elif __hpux |
29 |
# include <sys/socket.h> |
30 |
# elif __solaris /* not yet */ |
31 |
# include <sys/sendfile.h> |
32 |
# else |
33 |
# error sendfile support requested but not available |
34 |
# endif |
35 |
#endif |
36 |
|
37 |
/* used for struct dirent, AIX doesn't provide it */ |
38 |
#ifndef NAME_MAX |
39 |
# define NAME_MAX 4096 |
40 |
#endif |
41 |
|
42 |
#if __ia64 |
43 |
# define STACKSIZE 65536 |
44 |
#else |
45 |
# define STACKSIZE 8192 |
46 |
#endif |
47 |
|
48 |
enum { |
49 |
REQ_QUIT, |
50 |
REQ_OPEN, REQ_CLOSE, |
51 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
52 |
REQ_SENDFILE, |
53 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
54 |
REQ_FSYNC, REQ_FDATASYNC, |
55 |
REQ_UNLINK, REQ_RMDIR, REQ_RENAME, |
56 |
REQ_READDIR, |
57 |
REQ_LINK, REQ_SYMLINK, |
58 |
}; |
59 |
|
60 |
typedef struct aio_cb { |
61 |
struct aio_cb *volatile next; |
62 |
|
63 |
int type; |
64 |
|
65 |
/* should receive a cleanup, with unions */ |
66 |
int fd, fd2; |
67 |
off_t offset; |
68 |
size_t length; |
69 |
ssize_t result; |
70 |
mode_t mode; /* open */ |
71 |
int errorno; |
72 |
SV *data, *callback; |
73 |
SV *fh, *fh2; |
74 |
void *dataptr, *data2ptr; |
75 |
STRLEN dataoffset; |
76 |
|
77 |
Stat_t *statdata; |
78 |
} aio_cb; |
79 |
|
80 |
typedef aio_cb *aio_req; |
81 |
|
82 |
static int started, wanted; |
83 |
static volatile int nreqs; |
84 |
static int max_outstanding = 1<<30; |
85 |
static int respipe [2]; |
86 |
|
87 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
88 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
89 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
90 |
|
91 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
92 |
static volatile aio_req ress, rese; /* queue start, queue end */ |
93 |
|
94 |
static void free_req (aio_req req) |
95 |
{ |
96 |
if (req->data) |
97 |
SvREFCNT_dec (req->data); |
98 |
|
99 |
if (req->fh) |
100 |
SvREFCNT_dec (req->fh); |
101 |
|
102 |
if (req->fh2) |
103 |
SvREFCNT_dec (req->fh2); |
104 |
|
105 |
if (req->statdata) |
106 |
Safefree (req->statdata); |
107 |
|
108 |
if (req->callback) |
109 |
SvREFCNT_dec (req->callback); |
110 |
|
111 |
if (req->type == REQ_READDIR && req->result >= 0) |
112 |
free (req->data2ptr); |
113 |
|
114 |
Safefree (req); |
115 |
} |
116 |
|
117 |
static void |
118 |
poll_wait () |
119 |
{ |
120 |
if (nreqs && !ress) |
121 |
{ |
122 |
fd_set rfd; |
123 |
FD_ZERO(&rfd); |
124 |
FD_SET(respipe [0], &rfd); |
125 |
|
126 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
127 |
} |
128 |
} |
129 |
|
130 |
static int |
131 |
poll_cb () |
132 |
{ |
133 |
dSP; |
134 |
int count = 0; |
135 |
int do_croak = 0; |
136 |
aio_req req; |
137 |
|
138 |
for (;;) |
139 |
{ |
140 |
pthread_mutex_lock (&reslock); |
141 |
req = ress; |
142 |
|
143 |
if (req) |
144 |
{ |
145 |
ress = req->next; |
146 |
|
147 |
if (!ress) |
148 |
{ |
149 |
/* read any signals sent by the worker threads */ |
150 |
char buf [32]; |
151 |
while (read (respipe [0], buf, 32) == 32) |
152 |
; |
153 |
|
154 |
rese = 0; |
155 |
} |
156 |
} |
157 |
|
158 |
pthread_mutex_unlock (&reslock); |
159 |
|
160 |
if (!req) |
161 |
break; |
162 |
|
163 |
nreqs--; |
164 |
|
165 |
if (req->type == REQ_QUIT) |
166 |
started--; |
167 |
else |
168 |
{ |
169 |
int errorno = errno; |
170 |
errno = req->errorno; |
171 |
|
172 |
if (req->type == REQ_READ) |
173 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
174 |
|
175 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
176 |
SvREADONLY_off (req->data); |
177 |
|
178 |
if (req->statdata) |
179 |
{ |
180 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
181 |
PL_laststatval = req->result; |
182 |
PL_statcache = *(req->statdata); |
183 |
} |
184 |
|
185 |
ENTER; |
186 |
PUSHMARK (SP); |
187 |
|
188 |
if (req->type == REQ_READDIR) |
189 |
{ |
190 |
SV *rv = &PL_sv_undef; |
191 |
|
192 |
if (req->result >= 0) |
193 |
{ |
194 |
char *buf = req->data2ptr; |
195 |
AV *av = newAV (); |
196 |
|
197 |
while (req->result) |
198 |
{ |
199 |
SV *sv = newSVpv (buf, 0); |
200 |
|
201 |
av_push (av, sv); |
202 |
buf += SvCUR (sv) + 1; |
203 |
req->result--; |
204 |
} |
205 |
|
206 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
207 |
} |
208 |
|
209 |
XPUSHs (rv); |
210 |
} |
211 |
else |
212 |
{ |
213 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
214 |
|
215 |
if (req->type == REQ_OPEN) |
216 |
{ |
217 |
/* convert fd to fh */ |
218 |
SV *fh; |
219 |
|
220 |
PUTBACK; |
221 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
222 |
SPAGAIN; |
223 |
|
224 |
fh = SvREFCNT_inc (POPs); |
225 |
|
226 |
PUSHMARK (SP); |
227 |
XPUSHs (sv_2mortal (fh)); |
228 |
} |
229 |
} |
230 |
|
231 |
if (SvOK (req->callback)) |
232 |
{ |
233 |
PUTBACK; |
234 |
call_sv (req->callback, G_VOID | G_EVAL); |
235 |
SPAGAIN; |
236 |
|
237 |
if (SvTRUE (ERRSV)) |
238 |
{ |
239 |
free_req (req); |
240 |
croak (0); |
241 |
} |
242 |
} |
243 |
|
244 |
LEAVE; |
245 |
|
246 |
errno = errorno; |
247 |
count++; |
248 |
} |
249 |
|
250 |
free_req (req); |
251 |
} |
252 |
|
253 |
return count; |
254 |
} |
255 |
|
256 |
static void *aio_proc(void *arg); |
257 |
|
258 |
static void |
259 |
start_thread (void) |
260 |
{ |
261 |
sigset_t fullsigset, oldsigset; |
262 |
pthread_t tid; |
263 |
pthread_attr_t attr; |
264 |
|
265 |
pthread_attr_init (&attr); |
266 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
267 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
268 |
|
269 |
sigfillset (&fullsigset); |
270 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
271 |
|
272 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
273 |
started++; |
274 |
|
275 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
276 |
} |
277 |
|
278 |
static void |
279 |
send_req (aio_req req) |
280 |
{ |
281 |
while (started < wanted && nreqs >= started) |
282 |
start_thread (); |
283 |
|
284 |
nreqs++; |
285 |
|
286 |
pthread_mutex_lock (&reqlock); |
287 |
|
288 |
req->next = 0; |
289 |
|
290 |
if (reqe) |
291 |
{ |
292 |
reqe->next = req; |
293 |
reqe = req; |
294 |
} |
295 |
else |
296 |
reqe = reqs = req; |
297 |
|
298 |
pthread_cond_signal (&reqwait); |
299 |
pthread_mutex_unlock (&reqlock); |
300 |
|
301 |
if (nreqs > max_outstanding) |
302 |
for (;;) |
303 |
{ |
304 |
poll_cb (); |
305 |
|
306 |
if (nreqs <= max_outstanding) |
307 |
break; |
308 |
|
309 |
poll_wait (); |
310 |
} |
311 |
} |
312 |
|
313 |
static void |
314 |
end_thread (void) |
315 |
{ |
316 |
aio_req req; |
317 |
Newz (0, req, 1, aio_cb); |
318 |
req->type = REQ_QUIT; |
319 |
|
320 |
send_req (req); |
321 |
} |
322 |
|
323 |
static void min_parallel (int nthreads) |
324 |
{ |
325 |
if (wanted < nthreads) |
326 |
wanted = nthreads; |
327 |
} |
328 |
|
329 |
static void max_parallel (int nthreads) |
330 |
{ |
331 |
int cur = started; |
332 |
|
333 |
if (wanted > nthreads) |
334 |
wanted = nthreads; |
335 |
|
336 |
while (cur > wanted) |
337 |
{ |
338 |
end_thread (); |
339 |
cur--; |
340 |
} |
341 |
|
342 |
while (started > wanted) |
343 |
{ |
344 |
poll_wait (); |
345 |
poll_cb (); |
346 |
} |
347 |
} |
348 |
|
349 |
static void create_pipe () |
350 |
{ |
351 |
if (pipe (respipe)) |
352 |
croak ("unable to initialize result pipe"); |
353 |
|
354 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
355 |
croak ("cannot set result pipe to nonblocking mode"); |
356 |
|
357 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
358 |
croak ("cannot set result pipe to nonblocking mode"); |
359 |
} |
360 |
|
361 |
/*****************************************************************************/ |
362 |
/* work around various missing functions */ |
363 |
|
364 |
#if !HAVE_PREADWRITE |
365 |
# define pread aio_pread |
366 |
# define pwrite aio_pwrite |
367 |
|
368 |
/* |
369 |
* make our pread/pwrite safe against themselves, but not against |
370 |
* normal read/write by using a mutex. slows down execution a lot, |
371 |
* but that's your problem, not mine. |
372 |
*/ |
373 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
374 |
|
375 |
static ssize_t |
376 |
pread (int fd, void *buf, size_t count, off_t offset) |
377 |
{ |
378 |
ssize_t res; |
379 |
off_t ooffset; |
380 |
|
381 |
pthread_mutex_lock (&preadwritelock); |
382 |
ooffset = lseek (fd, 0, SEEK_CUR); |
383 |
lseek (fd, offset, SEEK_SET); |
384 |
res = read (fd, buf, count); |
385 |
lseek (fd, ooffset, SEEK_SET); |
386 |
pthread_mutex_unlock (&preadwritelock); |
387 |
|
388 |
return res; |
389 |
} |
390 |
|
391 |
static ssize_t |
392 |
pwrite (int fd, void *buf, size_t count, off_t offset) |
393 |
{ |
394 |
ssize_t res; |
395 |
off_t ooffset; |
396 |
|
397 |
pthread_mutex_lock (&preadwritelock); |
398 |
ooffset = lseek (fd, 0, SEEK_CUR); |
399 |
lseek (fd, offset, SEEK_SET); |
400 |
res = write (fd, buf, count); |
401 |
lseek (fd, offset, SEEK_SET); |
402 |
pthread_mutex_unlock (&preadwritelock); |
403 |
|
404 |
return res; |
405 |
} |
406 |
#endif |
407 |
|
408 |
#if !HAVE_FDATASYNC |
409 |
# define fdatasync fsync |
410 |
#endif |
411 |
|
412 |
#if !HAVE_READAHEAD |
413 |
# define readahead aio_readahead |
414 |
|
415 |
static ssize_t |
416 |
readahead (int fd, off_t offset, size_t count) |
417 |
{ |
418 |
char readahead_buf[4096]; |
419 |
|
420 |
while (count > 0) |
421 |
{ |
422 |
size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); |
423 |
|
424 |
pread (fd, readahead_buf, len, offset); |
425 |
offset += len; |
426 |
count -= len; |
427 |
} |
428 |
|
429 |
errno = 0; |
430 |
} |
431 |
#endif |
432 |
|
433 |
#if !HAVE_READDIR_R |
434 |
# define readdir_r aio_readdir_r |
435 |
|
436 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
437 |
|
438 |
static int |
439 |
readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
440 |
{ |
441 |
struct dirent *e; |
442 |
int errorno; |
443 |
|
444 |
pthread_mutex_lock (&readdirlock); |
445 |
|
446 |
e = readdir (dirp); |
447 |
errorno = errno; |
448 |
|
449 |
if (e) |
450 |
{ |
451 |
*res = ent; |
452 |
strcpy (ent->d_name, e->d_name); |
453 |
} |
454 |
else |
455 |
*res = 0; |
456 |
|
457 |
pthread_mutex_unlock (&readdirlock); |
458 |
|
459 |
errno = errorno; |
460 |
return e ? 0 : -1; |
461 |
} |
462 |
#endif |
463 |
|
464 |
/* sendfile always needs emulation */ |
465 |
static ssize_t |
466 |
sendfile_ (int ofd, int ifd, off_t offset, size_t count) |
467 |
{ |
468 |
ssize_t res; |
469 |
|
470 |
if (!count) |
471 |
return 0; |
472 |
|
473 |
#if HAVE_SENDFILE |
474 |
# if __linux |
475 |
res = sendfile (ofd, ifd, &offset, count); |
476 |
|
477 |
# elif __freebsd |
478 |
/* |
479 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
480 |
* wasted on making it similar to other I/O functions. |
481 |
*/ |
482 |
{ |
483 |
off_t sbytes; |
484 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
485 |
|
486 |
if (res < 0 && sbytes) |
487 |
/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */ |
488 |
res = sbytes; |
489 |
} |
490 |
|
491 |
# elif __hpux |
492 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
493 |
|
494 |
# elif __solaris |
495 |
{ |
496 |
struct sendfilevec vec; |
497 |
size_t sbytes; |
498 |
|
499 |
vec.sfv_fd = ifd; |
500 |
vec.sfv_flag = 0; |
501 |
vec.sfv_off = offset; |
502 |
vec.sfv_len = count; |
503 |
|
504 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
505 |
|
506 |
if (res < 0 && sbytes) |
507 |
res = sbytes; |
508 |
} |
509 |
|
510 |
# endif |
511 |
#else |
512 |
res = -1; |
513 |
errno = ENOSYS; |
514 |
#endif |
515 |
|
516 |
if (res < 0 |
517 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
518 |
#if __solaris |
519 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
520 |
#endif |
521 |
) |
522 |
) |
523 |
{ |
524 |
/* emulate sendfile. this is a major pain in the ass */ |
525 |
char buf[4096]; |
526 |
res = 0; |
527 |
|
528 |
while (count) |
529 |
{ |
530 |
ssize_t cnt; |
531 |
|
532 |
cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset); |
533 |
|
534 |
if (cnt <= 0) |
535 |
{ |
536 |
if (cnt && !res) res = -1; |
537 |
break; |
538 |
} |
539 |
|
540 |
cnt = write (ofd, buf, cnt); |
541 |
|
542 |
if (cnt <= 0) |
543 |
{ |
544 |
if (cnt && !res) res = -1; |
545 |
break; |
546 |
} |
547 |
|
548 |
offset += cnt; |
549 |
res += cnt; |
550 |
count -= cnt; |
551 |
} |
552 |
} |
553 |
|
554 |
return res; |
555 |
} |
556 |
|
557 |
/* read a full directory */ |
558 |
static int |
559 |
scandir_ (const char *path, void **namesp) |
560 |
{ |
561 |
DIR *dirp = opendir (path); |
562 |
union |
563 |
{ |
564 |
struct dirent d; |
565 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
566 |
} u; |
567 |
struct dirent *entp; |
568 |
char *name, *names; |
569 |
int memlen = 4096; |
570 |
int memofs = 0; |
571 |
int res = 0; |
572 |
int errorno; |
573 |
|
574 |
if (!dirp) |
575 |
return -1; |
576 |
|
577 |
names = malloc (memlen); |
578 |
|
579 |
for (;;) |
580 |
{ |
581 |
errno = 0, readdir_r (dirp, &u.d, &entp); |
582 |
|
583 |
if (!entp) |
584 |
break; |
585 |
|
586 |
name = entp->d_name; |
587 |
|
588 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
589 |
{ |
590 |
int len = strlen (name) + 1; |
591 |
|
592 |
res++; |
593 |
|
594 |
while (memofs + len > memlen) |
595 |
{ |
596 |
memlen *= 2; |
597 |
names = realloc (names, memlen); |
598 |
if (!names) |
599 |
break; |
600 |
} |
601 |
|
602 |
memcpy (names + memofs, name, len); |
603 |
memofs += len; |
604 |
} |
605 |
} |
606 |
|
607 |
errorno = errno; |
608 |
closedir (dirp); |
609 |
|
610 |
if (errorno) |
611 |
{ |
612 |
free (names); |
613 |
errno = errorno; |
614 |
res = -1; |
615 |
} |
616 |
|
617 |
*namesp = (void *)names; |
618 |
return res; |
619 |
} |
620 |
|
621 |
/*****************************************************************************/ |
622 |
|
623 |
static void * |
624 |
aio_proc (void *thr_arg) |
625 |
{ |
626 |
aio_req req; |
627 |
int type; |
628 |
|
629 |
do |
630 |
{ |
631 |
pthread_mutex_lock (&reqlock); |
632 |
|
633 |
for (;;) |
634 |
{ |
635 |
req = reqs; |
636 |
|
637 |
if (reqs) |
638 |
{ |
639 |
reqs = reqs->next; |
640 |
if (!reqs) reqe = 0; |
641 |
} |
642 |
|
643 |
if (req) |
644 |
break; |
645 |
|
646 |
pthread_cond_wait (&reqwait, &reqlock); |
647 |
} |
648 |
|
649 |
pthread_mutex_unlock (&reqlock); |
650 |
|
651 |
errno = 0; /* strictly unnecessary */ |
652 |
|
653 |
type = req->type; |
654 |
|
655 |
switch (type) |
656 |
{ |
657 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
658 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
659 |
|
660 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
661 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break; |
662 |
|
663 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
664 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
665 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
666 |
|
667 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
668 |
case REQ_CLOSE: req->result = close (req->fd); break; |
669 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
670 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
671 |
case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; |
672 |
case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; |
673 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
674 |
|
675 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
676 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
677 |
case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break; |
678 |
|
679 |
case REQ_QUIT: |
680 |
break; |
681 |
|
682 |
default: |
683 |
req->result = ENOSYS; |
684 |
break; |
685 |
} |
686 |
|
687 |
req->errorno = errno; |
688 |
|
689 |
pthread_mutex_lock (&reslock); |
690 |
|
691 |
req->next = 0; |
692 |
|
693 |
if (rese) |
694 |
{ |
695 |
rese->next = req; |
696 |
rese = req; |
697 |
} |
698 |
else |
699 |
{ |
700 |
rese = ress = req; |
701 |
|
702 |
/* write a dummy byte to the pipe so fh becomes ready */ |
703 |
write (respipe [1], &respipe, 1); |
704 |
} |
705 |
|
706 |
pthread_mutex_unlock (&reslock); |
707 |
} |
708 |
while (type != REQ_QUIT); |
709 |
|
710 |
return 0; |
711 |
} |
712 |
|
713 |
/*****************************************************************************/ |
714 |
|
715 |
static void atfork_prepare (void) |
716 |
{ |
717 |
pthread_mutex_lock (&reqlock); |
718 |
pthread_mutex_lock (&reslock); |
719 |
#if !HAVE_PREADWRITE |
720 |
pthread_mutex_lock (&preadwritelock); |
721 |
#endif |
722 |
#if !HAVE_READDIR_R |
723 |
pthread_mutex_lock (&readdirlock); |
724 |
#endif |
725 |
} |
726 |
|
727 |
static void atfork_parent (void) |
728 |
{ |
729 |
#if !HAVE_READDIR_R |
730 |
pthread_mutex_unlock (&readdirlock); |
731 |
#endif |
732 |
#if !HAVE_PREADWRITE |
733 |
pthread_mutex_unlock (&preadwritelock); |
734 |
#endif |
735 |
pthread_mutex_unlock (&reslock); |
736 |
pthread_mutex_unlock (&reqlock); |
737 |
} |
738 |
|
739 |
static void atfork_child (void) |
740 |
{ |
741 |
aio_req prv; |
742 |
|
743 |
started = 0; |
744 |
|
745 |
while (reqs) |
746 |
{ |
747 |
prv = reqs; |
748 |
reqs = prv->next; |
749 |
free_req (prv); |
750 |
} |
751 |
|
752 |
reqs = reqe = 0; |
753 |
|
754 |
while (ress) |
755 |
{ |
756 |
prv = ress; |
757 |
ress = prv->next; |
758 |
free_req (prv); |
759 |
} |
760 |
|
761 |
ress = rese = 0; |
762 |
|
763 |
close (respipe [0]); |
764 |
close (respipe [1]); |
765 |
create_pipe (); |
766 |
|
767 |
atfork_parent (); |
768 |
} |
769 |
|
770 |
#define dREQ \ |
771 |
aio_req req; \ |
772 |
\ |
773 |
if (SvOK (callback) && !SvROK (callback)) \ |
774 |
croak ("clalback must be undef or of reference type"); \ |
775 |
\ |
776 |
Newz (0, req, 1, aio_cb); \ |
777 |
if (!req) \ |
778 |
croak ("out of memory during aio_req allocation"); \ |
779 |
\ |
780 |
req->callback = newSVsv (callback); |
781 |
|
782 |
MODULE = IO::AIO PACKAGE = IO::AIO |
783 |
|
784 |
PROTOTYPES: ENABLE |
785 |
|
786 |
BOOT: |
787 |
{ |
788 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
789 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
790 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
791 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
792 |
|
793 |
create_pipe (); |
794 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
795 |
} |
796 |
|
797 |
void |
798 |
min_parallel (nthreads) |
799 |
int nthreads |
800 |
PROTOTYPE: $ |
801 |
|
802 |
void |
803 |
max_parallel (nthreads) |
804 |
int nthreads |
805 |
PROTOTYPE: $ |
806 |
|
807 |
int |
808 |
max_outstanding (nreqs) |
809 |
int nreqs |
810 |
PROTOTYPE: $ |
811 |
CODE: |
812 |
RETVAL = max_outstanding; |
813 |
max_outstanding = nreqs; |
814 |
|
815 |
void |
816 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
817 |
SV * pathname |
818 |
int flags |
819 |
int mode |
820 |
SV * callback |
821 |
PROTOTYPE: $$$;$ |
822 |
CODE: |
823 |
{ |
824 |
dREQ; |
825 |
|
826 |
req->type = REQ_OPEN; |
827 |
req->data = newSVsv (pathname); |
828 |
req->dataptr = SvPVbyte_nolen (req->data); |
829 |
req->fd = flags; |
830 |
req->mode = mode; |
831 |
|
832 |
send_req (req); |
833 |
} |
834 |
|
835 |
void |
836 |
aio_close (fh,callback=&PL_sv_undef) |
837 |
SV * fh |
838 |
SV * callback |
839 |
PROTOTYPE: $;$ |
840 |
ALIAS: |
841 |
aio_close = REQ_CLOSE |
842 |
aio_fsync = REQ_FSYNC |
843 |
aio_fdatasync = REQ_FDATASYNC |
844 |
CODE: |
845 |
{ |
846 |
dREQ; |
847 |
|
848 |
req->type = ix; |
849 |
req->fh = newSVsv (fh); |
850 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
851 |
|
852 |
send_req (req); |
853 |
} |
854 |
|
855 |
void |
856 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
857 |
SV * fh |
858 |
UV offset |
859 |
UV length |
860 |
SV * data |
861 |
UV dataoffset |
862 |
SV * callback |
863 |
ALIAS: |
864 |
aio_read = REQ_READ |
865 |
aio_write = REQ_WRITE |
866 |
PROTOTYPE: $$$$$;$ |
867 |
CODE: |
868 |
{ |
869 |
aio_req req; |
870 |
STRLEN svlen; |
871 |
char *svptr = SvPVbyte (data, svlen); |
872 |
|
873 |
SvUPGRADE (data, SVt_PV); |
874 |
SvPOK_on (data); |
875 |
|
876 |
if (dataoffset < 0) |
877 |
dataoffset += svlen; |
878 |
|
879 |
if (dataoffset < 0 || dataoffset > svlen) |
880 |
croak ("data offset outside of string"); |
881 |
|
882 |
if (ix == REQ_WRITE) |
883 |
{ |
884 |
/* write: check length and adjust. */ |
885 |
if (length < 0 || length + dataoffset > svlen) |
886 |
length = svlen - dataoffset; |
887 |
} |
888 |
else |
889 |
{ |
890 |
/* read: grow scalar as necessary */ |
891 |
svptr = SvGROW (data, length + dataoffset); |
892 |
} |
893 |
|
894 |
if (length < 0) |
895 |
croak ("length must not be negative"); |
896 |
|
897 |
{ |
898 |
dREQ; |
899 |
|
900 |
req->type = ix; |
901 |
req->fh = newSVsv (fh); |
902 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
903 |
: IoOFP (sv_2io (fh))); |
904 |
req->offset = offset; |
905 |
req->length = length; |
906 |
req->data = SvREFCNT_inc (data); |
907 |
req->dataptr = (char *)svptr + dataoffset; |
908 |
|
909 |
if (!SvREADONLY (data)) |
910 |
{ |
911 |
SvREADONLY_on (data); |
912 |
req->data2ptr = (void *)data; |
913 |
} |
914 |
|
915 |
send_req (req); |
916 |
} |
917 |
} |
918 |
|
919 |
void |
920 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
921 |
SV * out_fh |
922 |
SV * in_fh |
923 |
UV in_offset |
924 |
UV length |
925 |
SV * callback |
926 |
PROTOTYPE: $$$$;$ |
927 |
CODE: |
928 |
{ |
929 |
dREQ; |
930 |
|
931 |
req->type = REQ_SENDFILE; |
932 |
req->fh = newSVsv (out_fh); |
933 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
934 |
req->fh2 = newSVsv (in_fh); |
935 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
936 |
req->offset = in_offset; |
937 |
req->length = length; |
938 |
|
939 |
send_req (req); |
940 |
} |
941 |
|
942 |
void |
943 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
944 |
SV * fh |
945 |
UV offset |
946 |
IV length |
947 |
SV * callback |
948 |
PROTOTYPE: $$$;$ |
949 |
CODE: |
950 |
{ |
951 |
dREQ; |
952 |
|
953 |
req->type = REQ_READAHEAD; |
954 |
req->fh = newSVsv (fh); |
955 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
956 |
req->offset = offset; |
957 |
req->length = length; |
958 |
|
959 |
send_req (req); |
960 |
} |
961 |
|
962 |
void |
963 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
964 |
SV * fh_or_path |
965 |
SV * callback |
966 |
ALIAS: |
967 |
aio_stat = REQ_STAT |
968 |
aio_lstat = REQ_LSTAT |
969 |
CODE: |
970 |
{ |
971 |
dREQ; |
972 |
|
973 |
New (0, req->statdata, 1, Stat_t); |
974 |
if (!req->statdata) |
975 |
{ |
976 |
free_req (req); |
977 |
croak ("out of memory during aio_req->statdata allocation"); |
978 |
} |
979 |
|
980 |
if (SvPOK (fh_or_path)) |
981 |
{ |
982 |
req->type = ix; |
983 |
req->data = newSVsv (fh_or_path); |
984 |
req->dataptr = SvPVbyte_nolen (req->data); |
985 |
} |
986 |
else |
987 |
{ |
988 |
req->type = REQ_FSTAT; |
989 |
req->fh = newSVsv (fh_or_path); |
990 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
991 |
} |
992 |
|
993 |
send_req (req); |
994 |
} |
995 |
|
996 |
void |
997 |
aio_unlink (pathname,callback=&PL_sv_undef) |
998 |
SV * pathname |
999 |
SV * callback |
1000 |
ALIAS: |
1001 |
aio_unlink = REQ_UNLINK |
1002 |
aio_rmdir = REQ_RMDIR |
1003 |
aio_readdir = REQ_READDIR |
1004 |
CODE: |
1005 |
{ |
1006 |
dREQ; |
1007 |
|
1008 |
req->type = ix; |
1009 |
req->data = newSVsv (pathname); |
1010 |
req->dataptr = SvPVbyte_nolen (req->data); |
1011 |
|
1012 |
send_req (req); |
1013 |
} |
1014 |
|
1015 |
void |
1016 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
1017 |
SV * oldpath |
1018 |
SV * newpath |
1019 |
SV * callback |
1020 |
ALIAS: |
1021 |
aio_link = REQ_LINK |
1022 |
aio_symlink = REQ_SYMLINK |
1023 |
aio_rename = REQ_RENAME |
1024 |
CODE: |
1025 |
{ |
1026 |
dREQ; |
1027 |
|
1028 |
req->type = ix; |
1029 |
req->fh = newSVsv (oldpath); |
1030 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
1031 |
req->data = newSVsv (newpath); |
1032 |
req->dataptr = SvPVbyte_nolen (req->data); |
1033 |
|
1034 |
send_req (req); |
1035 |
} |
1036 |
|
1037 |
void |
1038 |
flush () |
1039 |
PROTOTYPE: |
1040 |
CODE: |
1041 |
while (nreqs) |
1042 |
{ |
1043 |
poll_wait (); |
1044 |
poll_cb (); |
1045 |
} |
1046 |
|
1047 |
void |
1048 |
poll() |
1049 |
PROTOTYPE: |
1050 |
CODE: |
1051 |
if (nreqs) |
1052 |
{ |
1053 |
poll_wait (); |
1054 |
poll_cb (); |
1055 |
} |
1056 |
|
1057 |
int |
1058 |
poll_fileno() |
1059 |
PROTOTYPE: |
1060 |
CODE: |
1061 |
RETVAL = respipe [0]; |
1062 |
OUTPUT: |
1063 |
RETVAL |
1064 |
|
1065 |
int |
1066 |
poll_cb(...) |
1067 |
PROTOTYPE: |
1068 |
CODE: |
1069 |
RETVAL = poll_cb (); |
1070 |
OUTPUT: |
1071 |
RETVAL |
1072 |
|
1073 |
void |
1074 |
poll_wait() |
1075 |
PROTOTYPE: |
1076 |
CODE: |
1077 |
if (nreqs) |
1078 |
poll_wait (); |
1079 |
|
1080 |
int |
1081 |
nreqs() |
1082 |
PROTOTYPE: |
1083 |
CODE: |
1084 |
RETVAL = nreqs; |
1085 |
OUTPUT: |
1086 |
RETVAL |
1087 |
|