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 |
REQ_GROUP, |
59 |
}; |
60 |
|
61 |
#define AIO_REQ_KLASS "IO::AIO::REQ" |
62 |
#define AIO_GRP_KLASS "IO::AIO::GRP" |
63 |
|
64 |
typedef struct aio_cb |
65 |
{ |
66 |
struct aio_cb *grp, *grp_prev, *grp_next; |
67 |
|
68 |
struct aio_cb *volatile next; |
69 |
|
70 |
SV *self; /* the perl counterpart of this request, if any */ |
71 |
|
72 |
SV *data, *callback; |
73 |
SV *fh, *fh2; |
74 |
void *dataptr, *data2ptr; |
75 |
Stat_t *statdata; |
76 |
off_t offset; |
77 |
size_t length; |
78 |
ssize_t result; |
79 |
|
80 |
int type; |
81 |
int fd, fd2; |
82 |
int errorno; |
83 |
STRLEN dataoffset; |
84 |
mode_t mode; /* open */ |
85 |
unsigned char cancelled; |
86 |
} aio_cb; |
87 |
|
88 |
typedef aio_cb *aio_req; |
89 |
typedef aio_cb *aio_req_ornot; |
90 |
typedef aio_cb *aio_group; |
91 |
|
92 |
static int started, wanted; |
93 |
static volatile int nreqs; |
94 |
static int max_outstanding = 1<<30; |
95 |
static int respipe [2]; |
96 |
|
97 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
98 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
99 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
100 |
|
101 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
102 |
static volatile aio_req ress, rese; /* queue start, queue end */ |
103 |
|
104 |
/* must be called at most once */ |
105 |
static SV *req_sv (aio_req req, const char *klass) |
106 |
{ |
107 |
req->self = (SV *)newHV (); |
108 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
109 |
|
110 |
return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1))); |
111 |
} |
112 |
|
113 |
static aio_req SvAIO_REQ (SV *sv, const char *klass) |
114 |
{ |
115 |
if (!sv_derived_from (sv, klass) || !SvROK (sv)) |
116 |
croak ("object of class %s expected", klass); |
117 |
|
118 |
MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
119 |
|
120 |
return mg ? (aio_req)mg->mg_ptr : 0; |
121 |
} |
122 |
|
123 |
static void req_free (aio_req req) |
124 |
{ |
125 |
if (req->self) |
126 |
{ |
127 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
128 |
SvREFCNT_dec (req->self); |
129 |
} |
130 |
|
131 |
if (req->data) |
132 |
SvREFCNT_dec (req->data); |
133 |
|
134 |
if (req->fh) |
135 |
SvREFCNT_dec (req->fh); |
136 |
|
137 |
if (req->fh2) |
138 |
SvREFCNT_dec (req->fh2); |
139 |
|
140 |
if (req->statdata) |
141 |
Safefree (req->statdata); |
142 |
|
143 |
if (req->callback) |
144 |
SvREFCNT_dec (req->callback); |
145 |
|
146 |
if (req->type == REQ_READDIR && req->result >= 0) |
147 |
free (req->data2ptr); |
148 |
|
149 |
Safefree (req); |
150 |
} |
151 |
|
152 |
static void |
153 |
poll_wait () |
154 |
{ |
155 |
if (nreqs && !ress) |
156 |
{ |
157 |
fd_set rfd; |
158 |
FD_ZERO(&rfd); |
159 |
FD_SET(respipe [0], &rfd); |
160 |
|
161 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
162 |
} |
163 |
} |
164 |
|
165 |
static int |
166 |
poll_cb () |
167 |
{ |
168 |
dSP; |
169 |
int count = 0; |
170 |
int do_croak = 0; |
171 |
aio_req req; |
172 |
|
173 |
for (;;) |
174 |
{ |
175 |
pthread_mutex_lock (&reslock); |
176 |
req = ress; |
177 |
|
178 |
if (req) |
179 |
{ |
180 |
ress = req->next; |
181 |
|
182 |
if (!ress) |
183 |
{ |
184 |
/* read any signals sent by the worker threads */ |
185 |
char buf [32]; |
186 |
while (read (respipe [0], buf, 32) == 32) |
187 |
; |
188 |
|
189 |
rese = 0; |
190 |
} |
191 |
} |
192 |
|
193 |
pthread_mutex_unlock (&reslock); |
194 |
|
195 |
if (!req) |
196 |
break; |
197 |
|
198 |
nreqs--; |
199 |
|
200 |
if (req->type == REQ_QUIT) |
201 |
started--; |
202 |
else |
203 |
{ |
204 |
int errorno = errno; |
205 |
errno = req->errorno; |
206 |
|
207 |
if (req->type == REQ_READ) |
208 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
209 |
|
210 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
211 |
SvREADONLY_off (req->data); |
212 |
|
213 |
if (req->statdata) |
214 |
{ |
215 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
216 |
PL_laststatval = req->result; |
217 |
PL_statcache = *(req->statdata); |
218 |
} |
219 |
|
220 |
ENTER; |
221 |
PUSHMARK (SP); |
222 |
|
223 |
if (req->type == REQ_READDIR) |
224 |
{ |
225 |
SV *rv = &PL_sv_undef; |
226 |
|
227 |
if (req->result >= 0) |
228 |
{ |
229 |
char *buf = req->data2ptr; |
230 |
AV *av = newAV (); |
231 |
|
232 |
while (req->result) |
233 |
{ |
234 |
SV *sv = newSVpv (buf, 0); |
235 |
|
236 |
av_push (av, sv); |
237 |
buf += SvCUR (sv) + 1; |
238 |
req->result--; |
239 |
} |
240 |
|
241 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
242 |
} |
243 |
|
244 |
XPUSHs (rv); |
245 |
} |
246 |
else |
247 |
{ |
248 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
249 |
|
250 |
if (req->type == REQ_OPEN) |
251 |
{ |
252 |
/* convert fd to fh */ |
253 |
SV *fh; |
254 |
|
255 |
PUTBACK; |
256 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
257 |
SPAGAIN; |
258 |
|
259 |
fh = SvREFCNT_inc (POPs); |
260 |
|
261 |
PUSHMARK (SP); |
262 |
XPUSHs (sv_2mortal (fh)); |
263 |
} |
264 |
} |
265 |
|
266 |
if (SvOK (req->callback) && !req->cancelled) |
267 |
{ |
268 |
PUTBACK; |
269 |
call_sv (req->callback, G_VOID | G_EVAL); |
270 |
SPAGAIN; |
271 |
|
272 |
if (SvTRUE (ERRSV)) |
273 |
{ |
274 |
req_free (req); |
275 |
croak (0); |
276 |
} |
277 |
} |
278 |
|
279 |
LEAVE; |
280 |
|
281 |
errno = errorno; |
282 |
count++; |
283 |
} |
284 |
|
285 |
req_free (req); |
286 |
} |
287 |
|
288 |
return count; |
289 |
} |
290 |
|
291 |
static void *aio_proc(void *arg); |
292 |
|
293 |
static void |
294 |
start_thread (void) |
295 |
{ |
296 |
sigset_t fullsigset, oldsigset; |
297 |
pthread_t tid; |
298 |
pthread_attr_t attr; |
299 |
|
300 |
pthread_attr_init (&attr); |
301 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
302 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
303 |
|
304 |
sigfillset (&fullsigset); |
305 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
306 |
|
307 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
308 |
started++; |
309 |
|
310 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
311 |
} |
312 |
|
313 |
static void |
314 |
req_send (aio_req req) |
315 |
{ |
316 |
while (started < wanted && nreqs >= started) |
317 |
start_thread (); |
318 |
|
319 |
nreqs++; |
320 |
|
321 |
pthread_mutex_lock (&reqlock); |
322 |
|
323 |
req->next = 0; |
324 |
|
325 |
if (reqe) |
326 |
{ |
327 |
reqe->next = req; |
328 |
reqe = req; |
329 |
} |
330 |
else |
331 |
reqe = reqs = req; |
332 |
|
333 |
pthread_cond_signal (&reqwait); |
334 |
pthread_mutex_unlock (&reqlock); |
335 |
|
336 |
if (nreqs > max_outstanding) |
337 |
for (;;) |
338 |
{ |
339 |
poll_cb (); |
340 |
|
341 |
if (nreqs <= max_outstanding) |
342 |
break; |
343 |
|
344 |
poll_wait (); |
345 |
} |
346 |
} |
347 |
|
348 |
static void |
349 |
end_thread (void) |
350 |
{ |
351 |
aio_req req; |
352 |
Newz (0, req, 1, aio_cb); |
353 |
req->type = REQ_QUIT; |
354 |
|
355 |
req_send (req); |
356 |
} |
357 |
|
358 |
static void min_parallel (int nthreads) |
359 |
{ |
360 |
if (wanted < nthreads) |
361 |
wanted = nthreads; |
362 |
} |
363 |
|
364 |
static void max_parallel (int nthreads) |
365 |
{ |
366 |
int cur = started; |
367 |
|
368 |
if (wanted > nthreads) |
369 |
wanted = nthreads; |
370 |
|
371 |
while (cur > wanted) |
372 |
{ |
373 |
end_thread (); |
374 |
cur--; |
375 |
} |
376 |
|
377 |
while (started > wanted) |
378 |
{ |
379 |
poll_wait (); |
380 |
poll_cb (); |
381 |
} |
382 |
} |
383 |
|
384 |
static void create_pipe () |
385 |
{ |
386 |
if (pipe (respipe)) |
387 |
croak ("unable to initialize result pipe"); |
388 |
|
389 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
390 |
croak ("cannot set result pipe to nonblocking mode"); |
391 |
|
392 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
393 |
croak ("cannot set result pipe to nonblocking mode"); |
394 |
} |
395 |
|
396 |
/*****************************************************************************/ |
397 |
/* work around various missing functions */ |
398 |
|
399 |
#if !HAVE_PREADWRITE |
400 |
# define pread aio_pread |
401 |
# define pwrite aio_pwrite |
402 |
|
403 |
/* |
404 |
* make our pread/pwrite safe against themselves, but not against |
405 |
* normal read/write by using a mutex. slows down execution a lot, |
406 |
* but that's your problem, not mine. |
407 |
*/ |
408 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
409 |
|
410 |
static ssize_t |
411 |
pread (int fd, void *buf, size_t count, off_t offset) |
412 |
{ |
413 |
ssize_t res; |
414 |
off_t ooffset; |
415 |
|
416 |
pthread_mutex_lock (&preadwritelock); |
417 |
ooffset = lseek (fd, 0, SEEK_CUR); |
418 |
lseek (fd, offset, SEEK_SET); |
419 |
res = read (fd, buf, count); |
420 |
lseek (fd, ooffset, SEEK_SET); |
421 |
pthread_mutex_unlock (&preadwritelock); |
422 |
|
423 |
return res; |
424 |
} |
425 |
|
426 |
static ssize_t |
427 |
pwrite (int fd, void *buf, size_t count, off_t offset) |
428 |
{ |
429 |
ssize_t res; |
430 |
off_t ooffset; |
431 |
|
432 |
pthread_mutex_lock (&preadwritelock); |
433 |
ooffset = lseek (fd, 0, SEEK_CUR); |
434 |
lseek (fd, offset, SEEK_SET); |
435 |
res = write (fd, buf, count); |
436 |
lseek (fd, offset, SEEK_SET); |
437 |
pthread_mutex_unlock (&preadwritelock); |
438 |
|
439 |
return res; |
440 |
} |
441 |
#endif |
442 |
|
443 |
#if !HAVE_FDATASYNC |
444 |
# define fdatasync fsync |
445 |
#endif |
446 |
|
447 |
#if !HAVE_READAHEAD |
448 |
# define readahead aio_readahead |
449 |
|
450 |
static ssize_t |
451 |
readahead (int fd, off_t offset, size_t count) |
452 |
{ |
453 |
char readahead_buf[4096]; |
454 |
|
455 |
while (count > 0) |
456 |
{ |
457 |
size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); |
458 |
|
459 |
pread (fd, readahead_buf, len, offset); |
460 |
offset += len; |
461 |
count -= len; |
462 |
} |
463 |
|
464 |
errno = 0; |
465 |
} |
466 |
#endif |
467 |
|
468 |
#if !HAVE_READDIR_R |
469 |
# define readdir_r aio_readdir_r |
470 |
|
471 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
472 |
|
473 |
static int |
474 |
readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
475 |
{ |
476 |
struct dirent *e; |
477 |
int errorno; |
478 |
|
479 |
pthread_mutex_lock (&readdirlock); |
480 |
|
481 |
e = readdir (dirp); |
482 |
errorno = errno; |
483 |
|
484 |
if (e) |
485 |
{ |
486 |
*res = ent; |
487 |
strcpy (ent->d_name, e->d_name); |
488 |
} |
489 |
else |
490 |
*res = 0; |
491 |
|
492 |
pthread_mutex_unlock (&readdirlock); |
493 |
|
494 |
errno = errorno; |
495 |
return e ? 0 : -1; |
496 |
} |
497 |
#endif |
498 |
|
499 |
/* sendfile always needs emulation */ |
500 |
static ssize_t |
501 |
sendfile_ (int ofd, int ifd, off_t offset, size_t count) |
502 |
{ |
503 |
ssize_t res; |
504 |
|
505 |
if (!count) |
506 |
return 0; |
507 |
|
508 |
#if HAVE_SENDFILE |
509 |
# if __linux |
510 |
res = sendfile (ofd, ifd, &offset, count); |
511 |
|
512 |
# elif __freebsd |
513 |
/* |
514 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
515 |
* wasted on making it similar to other I/O functions. |
516 |
*/ |
517 |
{ |
518 |
off_t sbytes; |
519 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
520 |
|
521 |
if (res < 0 && sbytes) |
522 |
/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */ |
523 |
res = sbytes; |
524 |
} |
525 |
|
526 |
# elif __hpux |
527 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
528 |
|
529 |
# elif __solaris |
530 |
{ |
531 |
struct sendfilevec vec; |
532 |
size_t sbytes; |
533 |
|
534 |
vec.sfv_fd = ifd; |
535 |
vec.sfv_flag = 0; |
536 |
vec.sfv_off = offset; |
537 |
vec.sfv_len = count; |
538 |
|
539 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
540 |
|
541 |
if (res < 0 && sbytes) |
542 |
res = sbytes; |
543 |
} |
544 |
|
545 |
# endif |
546 |
#else |
547 |
res = -1; |
548 |
errno = ENOSYS; |
549 |
#endif |
550 |
|
551 |
if (res < 0 |
552 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
553 |
#if __solaris |
554 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
555 |
#endif |
556 |
) |
557 |
) |
558 |
{ |
559 |
/* emulate sendfile. this is a major pain in the ass */ |
560 |
char buf[4096]; |
561 |
res = 0; |
562 |
|
563 |
while (count) |
564 |
{ |
565 |
ssize_t cnt; |
566 |
|
567 |
cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset); |
568 |
|
569 |
if (cnt <= 0) |
570 |
{ |
571 |
if (cnt && !res) res = -1; |
572 |
break; |
573 |
} |
574 |
|
575 |
cnt = write (ofd, buf, cnt); |
576 |
|
577 |
if (cnt <= 0) |
578 |
{ |
579 |
if (cnt && !res) res = -1; |
580 |
break; |
581 |
} |
582 |
|
583 |
offset += cnt; |
584 |
res += cnt; |
585 |
count -= cnt; |
586 |
} |
587 |
} |
588 |
|
589 |
return res; |
590 |
} |
591 |
|
592 |
/* read a full directory */ |
593 |
static int |
594 |
scandir_ (const char *path, void **namesp) |
595 |
{ |
596 |
DIR *dirp = opendir (path); |
597 |
union |
598 |
{ |
599 |
struct dirent d; |
600 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
601 |
} u; |
602 |
struct dirent *entp; |
603 |
char *name, *names; |
604 |
int memlen = 4096; |
605 |
int memofs = 0; |
606 |
int res = 0; |
607 |
int errorno; |
608 |
|
609 |
if (!dirp) |
610 |
return -1; |
611 |
|
612 |
names = malloc (memlen); |
613 |
|
614 |
for (;;) |
615 |
{ |
616 |
errno = 0, readdir_r (dirp, &u.d, &entp); |
617 |
|
618 |
if (!entp) |
619 |
break; |
620 |
|
621 |
name = entp->d_name; |
622 |
|
623 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
624 |
{ |
625 |
int len = strlen (name) + 1; |
626 |
|
627 |
res++; |
628 |
|
629 |
while (memofs + len > memlen) |
630 |
{ |
631 |
memlen *= 2; |
632 |
names = realloc (names, memlen); |
633 |
if (!names) |
634 |
break; |
635 |
} |
636 |
|
637 |
memcpy (names + memofs, name, len); |
638 |
memofs += len; |
639 |
} |
640 |
} |
641 |
|
642 |
errorno = errno; |
643 |
closedir (dirp); |
644 |
|
645 |
if (errorno) |
646 |
{ |
647 |
free (names); |
648 |
errno = errorno; |
649 |
res = -1; |
650 |
} |
651 |
|
652 |
*namesp = (void *)names; |
653 |
return res; |
654 |
} |
655 |
|
656 |
/*****************************************************************************/ |
657 |
|
658 |
static void * |
659 |
aio_proc (void *thr_arg) |
660 |
{ |
661 |
aio_req req; |
662 |
int type; |
663 |
|
664 |
do |
665 |
{ |
666 |
pthread_mutex_lock (&reqlock); |
667 |
|
668 |
for (;;) |
669 |
{ |
670 |
req = reqs; |
671 |
|
672 |
if (reqs) |
673 |
{ |
674 |
reqs = reqs->next; |
675 |
if (!reqs) reqe = 0; |
676 |
} |
677 |
|
678 |
if (req) |
679 |
break; |
680 |
|
681 |
pthread_cond_wait (&reqwait, &reqlock); |
682 |
} |
683 |
|
684 |
pthread_mutex_unlock (&reqlock); |
685 |
|
686 |
errno = 0; /* strictly unnecessary */ |
687 |
|
688 |
if (!req->cancelled) |
689 |
switch (req->type) |
690 |
{ |
691 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
692 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
693 |
|
694 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
695 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break; |
696 |
|
697 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
698 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
699 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
700 |
|
701 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
702 |
case REQ_CLOSE: req->result = close (req->fd); break; |
703 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
704 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
705 |
case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; |
706 |
case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; |
707 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
708 |
|
709 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
710 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
711 |
case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break; |
712 |
|
713 |
case REQ_QUIT: |
714 |
break; |
715 |
|
716 |
default: |
717 |
req->result = ENOSYS; |
718 |
break; |
719 |
} |
720 |
|
721 |
req->errorno = errno; |
722 |
|
723 |
pthread_mutex_lock (&reslock); |
724 |
|
725 |
req->next = 0; |
726 |
|
727 |
if (rese) |
728 |
{ |
729 |
rese->next = req; |
730 |
rese = req; |
731 |
} |
732 |
else |
733 |
{ |
734 |
rese = ress = req; |
735 |
|
736 |
/* write a dummy byte to the pipe so fh becomes ready */ |
737 |
write (respipe [1], &respipe, 1); |
738 |
} |
739 |
|
740 |
pthread_mutex_unlock (&reslock); |
741 |
} |
742 |
while (type != REQ_QUIT); |
743 |
|
744 |
return 0; |
745 |
} |
746 |
|
747 |
/*****************************************************************************/ |
748 |
|
749 |
static void atfork_prepare (void) |
750 |
{ |
751 |
pthread_mutex_lock (&reqlock); |
752 |
pthread_mutex_lock (&reslock); |
753 |
#if !HAVE_PREADWRITE |
754 |
pthread_mutex_lock (&preadwritelock); |
755 |
#endif |
756 |
#if !HAVE_READDIR_R |
757 |
pthread_mutex_lock (&readdirlock); |
758 |
#endif |
759 |
} |
760 |
|
761 |
static void atfork_parent (void) |
762 |
{ |
763 |
#if !HAVE_READDIR_R |
764 |
pthread_mutex_unlock (&readdirlock); |
765 |
#endif |
766 |
#if !HAVE_PREADWRITE |
767 |
pthread_mutex_unlock (&preadwritelock); |
768 |
#endif |
769 |
pthread_mutex_unlock (&reslock); |
770 |
pthread_mutex_unlock (&reqlock); |
771 |
} |
772 |
|
773 |
static void atfork_child (void) |
774 |
{ |
775 |
aio_req prv; |
776 |
|
777 |
started = 0; |
778 |
|
779 |
while (reqs) |
780 |
{ |
781 |
prv = reqs; |
782 |
reqs = prv->next; |
783 |
req_free (prv); |
784 |
} |
785 |
|
786 |
reqs = reqe = 0; |
787 |
|
788 |
while (ress) |
789 |
{ |
790 |
prv = ress; |
791 |
ress = prv->next; |
792 |
req_free (prv); |
793 |
} |
794 |
|
795 |
ress = rese = 0; |
796 |
|
797 |
close (respipe [0]); |
798 |
close (respipe [1]); |
799 |
create_pipe (); |
800 |
|
801 |
atfork_parent (); |
802 |
} |
803 |
|
804 |
#define dREQ \ |
805 |
aio_req req; \ |
806 |
\ |
807 |
if (SvOK (callback) && !SvROK (callback)) \ |
808 |
croak ("callback must be undef or of reference type"); \ |
809 |
\ |
810 |
Newz (0, req, 1, aio_cb); \ |
811 |
if (!req) \ |
812 |
croak ("out of memory during aio_req allocation"); \ |
813 |
\ |
814 |
req->callback = newSVsv (callback) |
815 |
|
816 |
#define REQ_SEND \ |
817 |
req_send (req); \ |
818 |
\ |
819 |
if (GIMME_V != G_VOID) \ |
820 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
821 |
|
822 |
MODULE = IO::AIO PACKAGE = IO::AIO |
823 |
|
824 |
PROTOTYPES: ENABLE |
825 |
|
826 |
BOOT: |
827 |
{ |
828 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
829 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
830 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
831 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
832 |
|
833 |
create_pipe (); |
834 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
835 |
} |
836 |
|
837 |
void |
838 |
min_parallel (nthreads) |
839 |
int nthreads |
840 |
PROTOTYPE: $ |
841 |
|
842 |
void |
843 |
max_parallel (nthreads) |
844 |
int nthreads |
845 |
PROTOTYPE: $ |
846 |
|
847 |
int |
848 |
max_outstanding (nreqs) |
849 |
int nreqs |
850 |
PROTOTYPE: $ |
851 |
CODE: |
852 |
RETVAL = max_outstanding; |
853 |
max_outstanding = nreqs; |
854 |
|
855 |
void |
856 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
857 |
SV * pathname |
858 |
int flags |
859 |
int mode |
860 |
SV * callback |
861 |
PROTOTYPE: $$$;$ |
862 |
PPCODE: |
863 |
{ |
864 |
dREQ; |
865 |
|
866 |
req->type = REQ_OPEN; |
867 |
req->data = newSVsv (pathname); |
868 |
req->dataptr = SvPVbyte_nolen (req->data); |
869 |
req->fd = flags; |
870 |
req->mode = mode; |
871 |
|
872 |
REQ_SEND; |
873 |
} |
874 |
|
875 |
void |
876 |
aio_close (fh,callback=&PL_sv_undef) |
877 |
SV * fh |
878 |
SV * callback |
879 |
PROTOTYPE: $;$ |
880 |
ALIAS: |
881 |
aio_close = REQ_CLOSE |
882 |
aio_fsync = REQ_FSYNC |
883 |
aio_fdatasync = REQ_FDATASYNC |
884 |
PPCODE: |
885 |
{ |
886 |
dREQ; |
887 |
|
888 |
req->type = ix; |
889 |
req->fh = newSVsv (fh); |
890 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
891 |
|
892 |
REQ_SEND (req); |
893 |
} |
894 |
|
895 |
void |
896 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
897 |
SV * fh |
898 |
UV offset |
899 |
UV length |
900 |
SV * data |
901 |
UV dataoffset |
902 |
SV * callback |
903 |
ALIAS: |
904 |
aio_read = REQ_READ |
905 |
aio_write = REQ_WRITE |
906 |
PROTOTYPE: $$$$$;$ |
907 |
PPCODE: |
908 |
{ |
909 |
aio_req req; |
910 |
STRLEN svlen; |
911 |
char *svptr = SvPVbyte (data, svlen); |
912 |
|
913 |
SvUPGRADE (data, SVt_PV); |
914 |
SvPOK_on (data); |
915 |
|
916 |
if (dataoffset < 0) |
917 |
dataoffset += svlen; |
918 |
|
919 |
if (dataoffset < 0 || dataoffset > svlen) |
920 |
croak ("data offset outside of string"); |
921 |
|
922 |
if (ix == REQ_WRITE) |
923 |
{ |
924 |
/* write: check length and adjust. */ |
925 |
if (length < 0 || length + dataoffset > svlen) |
926 |
length = svlen - dataoffset; |
927 |
} |
928 |
else |
929 |
{ |
930 |
/* read: grow scalar as necessary */ |
931 |
svptr = SvGROW (data, length + dataoffset); |
932 |
} |
933 |
|
934 |
if (length < 0) |
935 |
croak ("length must not be negative"); |
936 |
|
937 |
{ |
938 |
dREQ; |
939 |
|
940 |
req->type = ix; |
941 |
req->fh = newSVsv (fh); |
942 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
943 |
: IoOFP (sv_2io (fh))); |
944 |
req->offset = offset; |
945 |
req->length = length; |
946 |
req->data = SvREFCNT_inc (data); |
947 |
req->dataptr = (char *)svptr + dataoffset; |
948 |
|
949 |
if (!SvREADONLY (data)) |
950 |
{ |
951 |
SvREADONLY_on (data); |
952 |
req->data2ptr = (void *)data; |
953 |
} |
954 |
|
955 |
REQ_SEND; |
956 |
} |
957 |
} |
958 |
|
959 |
void |
960 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
961 |
SV * out_fh |
962 |
SV * in_fh |
963 |
UV in_offset |
964 |
UV length |
965 |
SV * callback |
966 |
PROTOTYPE: $$$$;$ |
967 |
PPCODE: |
968 |
{ |
969 |
dREQ; |
970 |
|
971 |
req->type = REQ_SENDFILE; |
972 |
req->fh = newSVsv (out_fh); |
973 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
974 |
req->fh2 = newSVsv (in_fh); |
975 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
976 |
req->offset = in_offset; |
977 |
req->length = length; |
978 |
|
979 |
REQ_SEND; |
980 |
} |
981 |
|
982 |
void |
983 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
984 |
SV * fh |
985 |
UV offset |
986 |
IV length |
987 |
SV * callback |
988 |
PROTOTYPE: $$$;$ |
989 |
PPCODE: |
990 |
{ |
991 |
dREQ; |
992 |
|
993 |
req->type = REQ_READAHEAD; |
994 |
req->fh = newSVsv (fh); |
995 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
996 |
req->offset = offset; |
997 |
req->length = length; |
998 |
|
999 |
REQ_SEND; |
1000 |
} |
1001 |
|
1002 |
void |
1003 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
1004 |
SV * fh_or_path |
1005 |
SV * callback |
1006 |
ALIAS: |
1007 |
aio_stat = REQ_STAT |
1008 |
aio_lstat = REQ_LSTAT |
1009 |
PPCODE: |
1010 |
{ |
1011 |
dREQ; |
1012 |
|
1013 |
New (0, req->statdata, 1, Stat_t); |
1014 |
if (!req->statdata) |
1015 |
{ |
1016 |
req_free (req); |
1017 |
croak ("out of memory during aio_req->statdata allocation"); |
1018 |
} |
1019 |
|
1020 |
if (SvPOK (fh_or_path)) |
1021 |
{ |
1022 |
req->type = ix; |
1023 |
req->data = newSVsv (fh_or_path); |
1024 |
req->dataptr = SvPVbyte_nolen (req->data); |
1025 |
} |
1026 |
else |
1027 |
{ |
1028 |
req->type = REQ_FSTAT; |
1029 |
req->fh = newSVsv (fh_or_path); |
1030 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1031 |
} |
1032 |
|
1033 |
REQ_SEND; |
1034 |
} |
1035 |
|
1036 |
void |
1037 |
aio_unlink (pathname,callback=&PL_sv_undef) |
1038 |
SV * pathname |
1039 |
SV * callback |
1040 |
ALIAS: |
1041 |
aio_unlink = REQ_UNLINK |
1042 |
aio_rmdir = REQ_RMDIR |
1043 |
aio_readdir = REQ_READDIR |
1044 |
PPCODE: |
1045 |
{ |
1046 |
dREQ; |
1047 |
|
1048 |
req->type = ix; |
1049 |
req->data = newSVsv (pathname); |
1050 |
req->dataptr = SvPVbyte_nolen (req->data); |
1051 |
|
1052 |
REQ_SEND; |
1053 |
} |
1054 |
|
1055 |
void |
1056 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
1057 |
SV * oldpath |
1058 |
SV * newpath |
1059 |
SV * callback |
1060 |
ALIAS: |
1061 |
aio_link = REQ_LINK |
1062 |
aio_symlink = REQ_SYMLINK |
1063 |
aio_rename = REQ_RENAME |
1064 |
PPCODE: |
1065 |
{ |
1066 |
dREQ; |
1067 |
|
1068 |
req->type = ix; |
1069 |
req->fh = newSVsv (oldpath); |
1070 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
1071 |
req->data = newSVsv (newpath); |
1072 |
req->dataptr = SvPVbyte_nolen (req->data); |
1073 |
|
1074 |
REQ_SEND; |
1075 |
} |
1076 |
|
1077 |
void |
1078 |
aio_group (callback=&PL_sv_undef) |
1079 |
SV * callback |
1080 |
PROTOTYPE: ;& |
1081 |
PPCODE: |
1082 |
{ |
1083 |
dREQ; |
1084 |
req->type = REQ_GROUP; |
1085 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
1086 |
} |
1087 |
|
1088 |
void |
1089 |
flush () |
1090 |
PROTOTYPE: |
1091 |
CODE: |
1092 |
while (nreqs) |
1093 |
{ |
1094 |
poll_wait (); |
1095 |
poll_cb (); |
1096 |
} |
1097 |
|
1098 |
void |
1099 |
poll() |
1100 |
PROTOTYPE: |
1101 |
CODE: |
1102 |
if (nreqs) |
1103 |
{ |
1104 |
poll_wait (); |
1105 |
poll_cb (); |
1106 |
} |
1107 |
|
1108 |
int |
1109 |
poll_fileno() |
1110 |
PROTOTYPE: |
1111 |
CODE: |
1112 |
RETVAL = respipe [0]; |
1113 |
OUTPUT: |
1114 |
RETVAL |
1115 |
|
1116 |
int |
1117 |
poll_cb(...) |
1118 |
PROTOTYPE: |
1119 |
CODE: |
1120 |
RETVAL = poll_cb (); |
1121 |
OUTPUT: |
1122 |
RETVAL |
1123 |
|
1124 |
void |
1125 |
poll_wait() |
1126 |
PROTOTYPE: |
1127 |
CODE: |
1128 |
if (nreqs) |
1129 |
poll_wait (); |
1130 |
|
1131 |
int |
1132 |
nreqs() |
1133 |
PROTOTYPE: |
1134 |
CODE: |
1135 |
RETVAL = nreqs; |
1136 |
OUTPUT: |
1137 |
RETVAL |
1138 |
|
1139 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
1140 |
|
1141 |
void |
1142 |
cancel (aio_req_ornot req) |
1143 |
PROTOTYPE: |
1144 |
CODE: |
1145 |
req->cancelled = 1; |
1146 |
|