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 <sys/types.h> |
14 |
#include <sys/stat.h> |
15 |
#include <limits.h> |
16 |
#include <unistd.h> |
17 |
#include <fcntl.h> |
18 |
#include <signal.h> |
19 |
#include <sched.h> |
20 |
|
21 |
#if HAVE_SENDFILE |
22 |
# if __linux |
23 |
# include <sys/sendfile.h> |
24 |
# elif __freebsd |
25 |
# include <sys/socket.h> |
26 |
# include <sys/uio.h> |
27 |
# elif __hpux |
28 |
# include <sys/socket.h> |
29 |
# elif __solaris /* not yet */ |
30 |
# include <sys/sendfile.h> |
31 |
# else |
32 |
# error sendfile support requested but not available |
33 |
# endif |
34 |
#endif |
35 |
|
36 |
/* used for struct dirent, AIX doesn't provide it */ |
37 |
#ifndef NAME_MAX |
38 |
# define NAME_MAX 4096 |
39 |
#endif |
40 |
|
41 |
#if __ia64 |
42 |
# define STACKSIZE 65536 |
43 |
#else |
44 |
# define STACKSIZE 8192 |
45 |
#endif |
46 |
|
47 |
enum { |
48 |
REQ_QUIT, |
49 |
REQ_OPEN, REQ_CLOSE, |
50 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
51 |
REQ_SENDFILE, |
52 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
53 |
REQ_FSYNC, REQ_FDATASYNC, |
54 |
REQ_UNLINK, REQ_RMDIR, |
55 |
REQ_READDIR, |
56 |
REQ_SYMLINK, |
57 |
}; |
58 |
|
59 |
typedef struct aio_cb { |
60 |
struct aio_cb *volatile next; |
61 |
|
62 |
int type; |
63 |
|
64 |
/* should receive a cleanup, with unions */ |
65 |
int fd, fd2; |
66 |
off_t offset; |
67 |
size_t length; |
68 |
ssize_t result; |
69 |
mode_t mode; /* open */ |
70 |
int errorno; |
71 |
SV *data, *callback; |
72 |
SV *fh, *fh2; |
73 |
void *dataptr, *data2ptr; |
74 |
STRLEN dataoffset; |
75 |
|
76 |
Stat_t *statdata; |
77 |
} aio_cb; |
78 |
|
79 |
typedef aio_cb *aio_req; |
80 |
|
81 |
static int started, wanted; |
82 |
static volatile int nreqs; |
83 |
static int max_outstanding = 1<<30; |
84 |
static int respipe [2]; |
85 |
|
86 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
87 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
88 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
89 |
|
90 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
91 |
static volatile aio_req ress, rese; /* queue start, queue end */ |
92 |
|
93 |
static void free_req (aio_req req) |
94 |
{ |
95 |
if (req->data) |
96 |
SvREFCNT_dec (req->data); |
97 |
|
98 |
if (req->fh) |
99 |
SvREFCNT_dec (req->fh); |
100 |
|
101 |
if (req->fh2) |
102 |
SvREFCNT_dec (req->fh2); |
103 |
|
104 |
if (req->statdata) |
105 |
Safefree (req->statdata); |
106 |
|
107 |
if (req->callback) |
108 |
SvREFCNT_dec (req->callback); |
109 |
|
110 |
if (req->type == REQ_READDIR && req->result >= 0) |
111 |
free (req->data2ptr); |
112 |
|
113 |
Safefree (req); |
114 |
} |
115 |
|
116 |
static void |
117 |
poll_wait () |
118 |
{ |
119 |
if (nreqs && !ress) |
120 |
{ |
121 |
fd_set rfd; |
122 |
FD_ZERO(&rfd); |
123 |
FD_SET(respipe [0], &rfd); |
124 |
|
125 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
126 |
} |
127 |
} |
128 |
|
129 |
static int |
130 |
poll_cb () |
131 |
{ |
132 |
dSP; |
133 |
int count = 0; |
134 |
int do_croak = 0; |
135 |
aio_req req; |
136 |
|
137 |
for (;;) |
138 |
{ |
139 |
pthread_mutex_lock (&reslock); |
140 |
req = ress; |
141 |
|
142 |
if (req) |
143 |
{ |
144 |
ress = req->next; |
145 |
|
146 |
if (!ress) |
147 |
{ |
148 |
/* read any signals sent by the worker threads */ |
149 |
char buf [32]; |
150 |
while (read (respipe [0], buf, 32) == 32) |
151 |
; |
152 |
|
153 |
rese = 0; |
154 |
} |
155 |
} |
156 |
|
157 |
pthread_mutex_unlock (&reslock); |
158 |
|
159 |
if (!req) |
160 |
break; |
161 |
|
162 |
nreqs--; |
163 |
|
164 |
if (req->type == REQ_QUIT) |
165 |
started--; |
166 |
else |
167 |
{ |
168 |
int errorno = errno; |
169 |
errno = req->errorno; |
170 |
|
171 |
if (req->type == REQ_READ) |
172 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
173 |
|
174 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
175 |
SvREADONLY_off (req->data); |
176 |
|
177 |
if (req->statdata) |
178 |
{ |
179 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
180 |
PL_laststatval = req->result; |
181 |
PL_statcache = *(req->statdata); |
182 |
} |
183 |
|
184 |
ENTER; |
185 |
PUSHMARK (SP); |
186 |
|
187 |
if (req->type == REQ_READDIR) |
188 |
{ |
189 |
SV *rv = &PL_sv_undef; |
190 |
|
191 |
if (req->result >= 0) |
192 |
{ |
193 |
char *buf = req->data2ptr; |
194 |
AV *av = newAV (); |
195 |
|
196 |
while (req->result) |
197 |
{ |
198 |
SV *sv = newSVpv (buf, 0); |
199 |
|
200 |
av_push (av, sv); |
201 |
buf += SvCUR (sv) + 1; |
202 |
req->result--; |
203 |
} |
204 |
|
205 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
206 |
} |
207 |
|
208 |
XPUSHs (rv); |
209 |
} |
210 |
else |
211 |
{ |
212 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
213 |
|
214 |
if (req->type == REQ_OPEN) |
215 |
{ |
216 |
/* convert fd to fh */ |
217 |
SV *fh; |
218 |
|
219 |
PUTBACK; |
220 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
221 |
SPAGAIN; |
222 |
|
223 |
fh = SvREFCNT_inc (POPs); |
224 |
|
225 |
PUSHMARK (SP); |
226 |
XPUSHs (sv_2mortal (fh)); |
227 |
} |
228 |
} |
229 |
|
230 |
if (SvOK (req->callback)) |
231 |
{ |
232 |
PUTBACK; |
233 |
call_sv (req->callback, G_VOID | G_EVAL); |
234 |
SPAGAIN; |
235 |
|
236 |
if (SvTRUE (ERRSV)) |
237 |
{ |
238 |
free_req (req); |
239 |
croak (0); |
240 |
} |
241 |
} |
242 |
|
243 |
LEAVE; |
244 |
|
245 |
errno = errorno; |
246 |
count++; |
247 |
} |
248 |
|
249 |
free_req (req); |
250 |
} |
251 |
|
252 |
return count; |
253 |
} |
254 |
|
255 |
static void *aio_proc(void *arg); |
256 |
|
257 |
static void |
258 |
start_thread (void) |
259 |
{ |
260 |
sigset_t fullsigset, oldsigset; |
261 |
pthread_t tid; |
262 |
pthread_attr_t attr; |
263 |
|
264 |
pthread_attr_init (&attr); |
265 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
266 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
267 |
|
268 |
sigfillset (&fullsigset); |
269 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
270 |
|
271 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
272 |
started++; |
273 |
|
274 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
275 |
} |
276 |
|
277 |
static void |
278 |
send_req (aio_req req) |
279 |
{ |
280 |
while (started < wanted && nreqs >= started) |
281 |
start_thread (); |
282 |
|
283 |
nreqs++; |
284 |
|
285 |
pthread_mutex_lock (&reqlock); |
286 |
|
287 |
req->next = 0; |
288 |
|
289 |
if (reqe) |
290 |
{ |
291 |
reqe->next = req; |
292 |
reqe = req; |
293 |
} |
294 |
else |
295 |
reqe = reqs = req; |
296 |
|
297 |
pthread_cond_signal (&reqwait); |
298 |
pthread_mutex_unlock (&reqlock); |
299 |
|
300 |
if (nreqs > max_outstanding) |
301 |
for (;;) |
302 |
{ |
303 |
poll_cb (); |
304 |
|
305 |
if (nreqs <= max_outstanding) |
306 |
break; |
307 |
|
308 |
poll_wait (); |
309 |
} |
310 |
} |
311 |
|
312 |
static void |
313 |
end_thread (void) |
314 |
{ |
315 |
aio_req req; |
316 |
Newz (0, req, 1, aio_cb); |
317 |
req->type = REQ_QUIT; |
318 |
|
319 |
send_req (req); |
320 |
} |
321 |
|
322 |
static void min_parallel (int nthreads) |
323 |
{ |
324 |
if (wanted < nthreads) |
325 |
wanted = nthreads; |
326 |
} |
327 |
|
328 |
static void max_parallel (int nthreads) |
329 |
{ |
330 |
int cur = started; |
331 |
|
332 |
if (wanted > nthreads) |
333 |
wanted = nthreads; |
334 |
|
335 |
while (cur > wanted) |
336 |
{ |
337 |
end_thread (); |
338 |
cur--; |
339 |
} |
340 |
|
341 |
while (started > wanted) |
342 |
{ |
343 |
poll_wait (); |
344 |
poll_cb (); |
345 |
} |
346 |
} |
347 |
|
348 |
static void create_pipe () |
349 |
{ |
350 |
if (pipe (respipe)) |
351 |
croak ("unable to initialize result pipe"); |
352 |
|
353 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
354 |
croak ("cannot set result pipe to nonblocking mode"); |
355 |
|
356 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
357 |
croak ("cannot set result pipe to nonblocking mode"); |
358 |
} |
359 |
|
360 |
/*****************************************************************************/ |
361 |
/* work around various missing functions */ |
362 |
|
363 |
#if !HAVE_PREADWRITE |
364 |
# define pread aio_pread |
365 |
# define pwrite aio_pwrite |
366 |
|
367 |
/* |
368 |
* make our pread/pwrite safe against themselves, but not against |
369 |
* normal read/write by using a mutex. slows down execution a lot, |
370 |
* but that's your problem, not mine. |
371 |
*/ |
372 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
373 |
|
374 |
static ssize_t |
375 |
pread (int fd, void *buf, size_t count, off_t offset) |
376 |
{ |
377 |
ssize_t res; |
378 |
off_t ooffset; |
379 |
|
380 |
pthread_mutex_lock (&preadwritelock); |
381 |
ooffset = lseek (fd, 0, SEEK_CUR); |
382 |
lseek (fd, offset, SEEK_SET); |
383 |
res = read (fd, buf, count); |
384 |
lseek (fd, ooffset, SEEK_SET); |
385 |
pthread_mutex_unlock (&preadwritelock); |
386 |
|
387 |
return res; |
388 |
} |
389 |
|
390 |
static ssize_t |
391 |
pwrite (int fd, void *buf, size_t count, off_t offset) |
392 |
{ |
393 |
ssize_t res; |
394 |
off_t ooffset; |
395 |
|
396 |
pthread_mutex_lock (&preadwritelock); |
397 |
ooffset = lseek (fd, 0, SEEK_CUR); |
398 |
lseek (fd, offset, SEEK_SET); |
399 |
res = write (fd, buf, count); |
400 |
lseek (fd, offset, SEEK_SET); |
401 |
pthread_mutex_unlock (&preadwritelock); |
402 |
|
403 |
return res; |
404 |
} |
405 |
#endif |
406 |
|
407 |
#if !HAVE_FDATASYNC |
408 |
# define fdatasync fsync |
409 |
#endif |
410 |
|
411 |
#if !HAVE_READAHEAD |
412 |
# define readahead aio_readahead |
413 |
|
414 |
static ssize_t |
415 |
readahead (int fd, off_t offset, size_t count) |
416 |
{ |
417 |
char readahead_buf[4096]; |
418 |
|
419 |
while (count > 0) |
420 |
{ |
421 |
size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); |
422 |
|
423 |
pread (fd, readahead_buf, len, offset); |
424 |
offset += len; |
425 |
count -= len; |
426 |
} |
427 |
|
428 |
errno = 0; |
429 |
} |
430 |
#endif |
431 |
|
432 |
#if !HAVE_READDIR_R |
433 |
# define readdir_r aio_readdir_r |
434 |
|
435 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
436 |
|
437 |
static int |
438 |
readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
439 |
{ |
440 |
struct dirent *e; |
441 |
int errorno; |
442 |
|
443 |
pthread_mutex_lock (&readdirlock); |
444 |
|
445 |
e = readdir (dirp); |
446 |
errorno = errno; |
447 |
|
448 |
if (e) |
449 |
{ |
450 |
*res = ent; |
451 |
strcpy (ent->d_name, e->d_name); |
452 |
} |
453 |
else |
454 |
*res = 0; |
455 |
|
456 |
pthread_mutex_unlock (&readdirlock); |
457 |
|
458 |
errno = errorno; |
459 |
return e ? 0 : -1; |
460 |
} |
461 |
#endif |
462 |
|
463 |
/* sendfile always needs emulation */ |
464 |
static ssize_t |
465 |
sendfile_ (int ofd, int ifd, off_t offset, size_t count) |
466 |
{ |
467 |
ssize_t res; |
468 |
|
469 |
if (!count) |
470 |
return 0; |
471 |
|
472 |
#if HAVE_SENDFILE |
473 |
# if __linux |
474 |
res = sendfile (ofd, ifd, &offset, count); |
475 |
|
476 |
# elif __freebsd |
477 |
/* |
478 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
479 |
* wasted on making it similar to other I/O functions. |
480 |
*/ |
481 |
{ |
482 |
off_t sbytes; |
483 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
484 |
|
485 |
if (res < 0 && sbytes) |
486 |
/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */ |
487 |
res = sbytes; |
488 |
} |
489 |
|
490 |
# elif __hpux |
491 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
492 |
|
493 |
# elif __solaris |
494 |
{ |
495 |
struct sendfilevec vec; |
496 |
size_t sbytes; |
497 |
|
498 |
vec.sfv_fd = ifd; |
499 |
vec.sfv_flag = 0; |
500 |
vec.sfv_off = offset; |
501 |
vec.sfv_len = count; |
502 |
|
503 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
504 |
|
505 |
if (res < 0 && sbytes) |
506 |
res = sbytes; |
507 |
} |
508 |
|
509 |
# endif |
510 |
#else |
511 |
res = -1; |
512 |
errno = ENOSYS; |
513 |
#endif |
514 |
|
515 |
if (res < 0 |
516 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
517 |
#if __solaris |
518 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
519 |
#endif |
520 |
) |
521 |
) |
522 |
{ |
523 |
/* emulate sendfile. this is a major pain in the ass */ |
524 |
char buf[4096]; |
525 |
res = 0; |
526 |
|
527 |
while (count) |
528 |
{ |
529 |
ssize_t cnt; |
530 |
|
531 |
cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset); |
532 |
|
533 |
if (cnt <= 0) |
534 |
{ |
535 |
if (cnt && !res) res = -1; |
536 |
break; |
537 |
} |
538 |
|
539 |
cnt = write (ofd, buf, cnt); |
540 |
|
541 |
if (cnt <= 0) |
542 |
{ |
543 |
if (cnt && !res) res = -1; |
544 |
break; |
545 |
} |
546 |
|
547 |
offset += cnt; |
548 |
res += cnt; |
549 |
count -= cnt; |
550 |
} |
551 |
} |
552 |
|
553 |
return res; |
554 |
} |
555 |
|
556 |
/* read a full directory */ |
557 |
static int |
558 |
scandir_ (const char *path, void **namesp) |
559 |
{ |
560 |
DIR *dirp = opendir (path); |
561 |
union |
562 |
{ |
563 |
struct dirent d; |
564 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
565 |
} u; |
566 |
struct dirent *entp; |
567 |
char *name, *names; |
568 |
int memlen = 4096; |
569 |
int memofs = 0; |
570 |
int res = 0; |
571 |
int errorno; |
572 |
|
573 |
if (!dirp) |
574 |
return -1; |
575 |
|
576 |
names = malloc (memlen); |
577 |
|
578 |
for (;;) |
579 |
{ |
580 |
errno = 0, readdir_r (dirp, &u.d, &entp); |
581 |
|
582 |
if (!entp) |
583 |
break; |
584 |
|
585 |
name = entp->d_name; |
586 |
|
587 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
588 |
{ |
589 |
int len = strlen (name) + 1; |
590 |
|
591 |
res++; |
592 |
|
593 |
while (memofs + len > memlen) |
594 |
{ |
595 |
memlen *= 2; |
596 |
names = realloc (names, memlen); |
597 |
if (!names) |
598 |
break; |
599 |
} |
600 |
|
601 |
memcpy (names + memofs, name, len); |
602 |
memofs += len; |
603 |
} |
604 |
} |
605 |
|
606 |
errorno = errno; |
607 |
closedir (dirp); |
608 |
|
609 |
if (errorno) |
610 |
{ |
611 |
free (names); |
612 |
errno = errorno; |
613 |
res = -1; |
614 |
} |
615 |
|
616 |
*namesp = (void *)names; |
617 |
return res; |
618 |
} |
619 |
|
620 |
/*****************************************************************************/ |
621 |
|
622 |
static void * |
623 |
aio_proc (void *thr_arg) |
624 |
{ |
625 |
aio_req req; |
626 |
int type; |
627 |
|
628 |
do |
629 |
{ |
630 |
pthread_mutex_lock (&reqlock); |
631 |
|
632 |
for (;;) |
633 |
{ |
634 |
req = reqs; |
635 |
|
636 |
if (reqs) |
637 |
{ |
638 |
reqs = reqs->next; |
639 |
if (!reqs) reqe = 0; |
640 |
} |
641 |
|
642 |
if (req) |
643 |
break; |
644 |
|
645 |
pthread_cond_wait (&reqwait, &reqlock); |
646 |
} |
647 |
|
648 |
pthread_mutex_unlock (&reqlock); |
649 |
|
650 |
errno = 0; /* strictly unnecessary */ |
651 |
|
652 |
type = req->type; |
653 |
|
654 |
switch (type) |
655 |
{ |
656 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
657 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
658 |
|
659 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
660 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break; |
661 |
|
662 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
663 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
664 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
665 |
|
666 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
667 |
case REQ_CLOSE: req->result = close (req->fd); break; |
668 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
669 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
670 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
671 |
|
672 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
673 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
674 |
case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break; |
675 |
|
676 |
case REQ_QUIT: |
677 |
break; |
678 |
|
679 |
default: |
680 |
req->result = ENOSYS; |
681 |
break; |
682 |
} |
683 |
|
684 |
req->errorno = errno; |
685 |
|
686 |
pthread_mutex_lock (&reslock); |
687 |
|
688 |
req->next = 0; |
689 |
|
690 |
if (rese) |
691 |
{ |
692 |
rese->next = req; |
693 |
rese = req; |
694 |
} |
695 |
else |
696 |
{ |
697 |
rese = ress = req; |
698 |
|
699 |
/* write a dummy byte to the pipe so fh becomes ready */ |
700 |
write (respipe [1], &respipe, 1); |
701 |
} |
702 |
|
703 |
pthread_mutex_unlock (&reslock); |
704 |
} |
705 |
while (type != REQ_QUIT); |
706 |
|
707 |
return 0; |
708 |
} |
709 |
|
710 |
/*****************************************************************************/ |
711 |
|
712 |
static void atfork_prepare (void) |
713 |
{ |
714 |
pthread_mutex_lock (&reqlock); |
715 |
pthread_mutex_lock (&reslock); |
716 |
#if !HAVE_PREADWRITE |
717 |
pthread_mutex_lock (&preadwritelock); |
718 |
#endif |
719 |
#if !HAVE_READDIR_R |
720 |
pthread_mutex_lock (&readdirlock); |
721 |
#endif |
722 |
} |
723 |
|
724 |
static void atfork_parent (void) |
725 |
{ |
726 |
#if !HAVE_READDIR_R |
727 |
pthread_mutex_unlock (&readdirlock); |
728 |
#endif |
729 |
#if !HAVE_PREADWRITE |
730 |
pthread_mutex_unlock (&preadwritelock); |
731 |
#endif |
732 |
pthread_mutex_unlock (&reslock); |
733 |
pthread_mutex_unlock (&reqlock); |
734 |
} |
735 |
|
736 |
static void atfork_child (void) |
737 |
{ |
738 |
aio_req prv; |
739 |
|
740 |
started = 0; |
741 |
|
742 |
while (reqs) |
743 |
{ |
744 |
prv = reqs; |
745 |
reqs = prv->next; |
746 |
free_req (prv); |
747 |
} |
748 |
|
749 |
reqs = reqe = 0; |
750 |
|
751 |
while (ress) |
752 |
{ |
753 |
prv = ress; |
754 |
ress = prv->next; |
755 |
free_req (prv); |
756 |
} |
757 |
|
758 |
ress = rese = 0; |
759 |
|
760 |
close (respipe [0]); |
761 |
close (respipe [1]); |
762 |
create_pipe (); |
763 |
|
764 |
atfork_parent (); |
765 |
} |
766 |
|
767 |
#define dREQ \ |
768 |
aio_req req; \ |
769 |
\ |
770 |
if (SvOK (callback) && !SvROK (callback)) \ |
771 |
croak ("clalback must be undef or of reference type"); \ |
772 |
\ |
773 |
Newz (0, req, 1, aio_cb); \ |
774 |
if (!req) \ |
775 |
croak ("out of memory during aio_req allocation"); \ |
776 |
\ |
777 |
req->callback = newSVsv (callback); |
778 |
|
779 |
MODULE = IO::AIO PACKAGE = IO::AIO |
780 |
|
781 |
PROTOTYPES: ENABLE |
782 |
|
783 |
BOOT: |
784 |
{ |
785 |
create_pipe (); |
786 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
787 |
} |
788 |
|
789 |
void |
790 |
min_parallel(nthreads) |
791 |
int nthreads |
792 |
PROTOTYPE: $ |
793 |
|
794 |
void |
795 |
max_parallel(nthreads) |
796 |
int nthreads |
797 |
PROTOTYPE: $ |
798 |
|
799 |
int |
800 |
max_outstanding(nreqs) |
801 |
int nreqs |
802 |
PROTOTYPE: $ |
803 |
CODE: |
804 |
RETVAL = max_outstanding; |
805 |
max_outstanding = nreqs; |
806 |
|
807 |
void |
808 |
aio_open(pathname,flags,mode,callback=&PL_sv_undef) |
809 |
SV * pathname |
810 |
int flags |
811 |
int mode |
812 |
SV * callback |
813 |
PROTOTYPE: $$$;$ |
814 |
CODE: |
815 |
{ |
816 |
dREQ; |
817 |
|
818 |
req->type = REQ_OPEN; |
819 |
req->data = newSVsv (pathname); |
820 |
req->dataptr = SvPVbyte_nolen (req->data); |
821 |
req->fd = flags; |
822 |
req->mode = mode; |
823 |
|
824 |
send_req (req); |
825 |
} |
826 |
|
827 |
void |
828 |
aio_close(fh,callback=&PL_sv_undef) |
829 |
SV * fh |
830 |
SV * callback |
831 |
PROTOTYPE: $;$ |
832 |
ALIAS: |
833 |
aio_close = REQ_CLOSE |
834 |
aio_fsync = REQ_FSYNC |
835 |
aio_fdatasync = REQ_FDATASYNC |
836 |
CODE: |
837 |
{ |
838 |
dREQ; |
839 |
|
840 |
req->type = ix; |
841 |
req->fh = newSVsv (fh); |
842 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
843 |
|
844 |
send_req (req); |
845 |
} |
846 |
|
847 |
void |
848 |
aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
849 |
SV * fh |
850 |
UV offset |
851 |
UV length |
852 |
SV * data |
853 |
UV dataoffset |
854 |
SV * callback |
855 |
ALIAS: |
856 |
aio_read = REQ_READ |
857 |
aio_write = REQ_WRITE |
858 |
PROTOTYPE: $$$$$;$ |
859 |
CODE: |
860 |
{ |
861 |
aio_req req; |
862 |
STRLEN svlen; |
863 |
char *svptr = SvPVbyte (data, svlen); |
864 |
|
865 |
SvUPGRADE (data, SVt_PV); |
866 |
SvPOK_on (data); |
867 |
|
868 |
if (dataoffset < 0) |
869 |
dataoffset += svlen; |
870 |
|
871 |
if (dataoffset < 0 || dataoffset > svlen) |
872 |
croak ("data offset outside of string"); |
873 |
|
874 |
if (ix == REQ_WRITE) |
875 |
{ |
876 |
/* write: check length and adjust. */ |
877 |
if (length < 0 || length + dataoffset > svlen) |
878 |
length = svlen - dataoffset; |
879 |
} |
880 |
else |
881 |
{ |
882 |
/* read: grow scalar as necessary */ |
883 |
svptr = SvGROW (data, length + dataoffset); |
884 |
} |
885 |
|
886 |
if (length < 0) |
887 |
croak ("length must not be negative"); |
888 |
|
889 |
{ |
890 |
dREQ; |
891 |
|
892 |
req->type = ix; |
893 |
req->fh = newSVsv (fh); |
894 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
895 |
: IoOFP (sv_2io (fh))); |
896 |
req->offset = offset; |
897 |
req->length = length; |
898 |
req->data = SvREFCNT_inc (data); |
899 |
req->dataptr = (char *)svptr + dataoffset; |
900 |
|
901 |
if (!SvREADONLY (data)) |
902 |
{ |
903 |
SvREADONLY_on (data); |
904 |
req->data2ptr = (void *)data; |
905 |
} |
906 |
|
907 |
send_req (req); |
908 |
} |
909 |
} |
910 |
|
911 |
void |
912 |
aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
913 |
SV * out_fh |
914 |
SV * in_fh |
915 |
UV in_offset |
916 |
UV length |
917 |
SV * callback |
918 |
PROTOTYPE: $$$$;$ |
919 |
CODE: |
920 |
{ |
921 |
dREQ; |
922 |
|
923 |
req->type = REQ_SENDFILE; |
924 |
req->fh = newSVsv (out_fh); |
925 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
926 |
req->fh2 = newSVsv (in_fh); |
927 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
928 |
req->offset = in_offset; |
929 |
req->length = length; |
930 |
|
931 |
send_req (req); |
932 |
} |
933 |
|
934 |
void |
935 |
aio_readahead(fh,offset,length,callback=&PL_sv_undef) |
936 |
SV * fh |
937 |
UV offset |
938 |
IV length |
939 |
SV * callback |
940 |
PROTOTYPE: $$$;$ |
941 |
CODE: |
942 |
{ |
943 |
dREQ; |
944 |
|
945 |
req->type = REQ_READAHEAD; |
946 |
req->fh = newSVsv (fh); |
947 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
948 |
req->offset = offset; |
949 |
req->length = length; |
950 |
|
951 |
send_req (req); |
952 |
} |
953 |
|
954 |
void |
955 |
aio_stat(fh_or_path,callback=&PL_sv_undef) |
956 |
SV * fh_or_path |
957 |
SV * callback |
958 |
ALIAS: |
959 |
aio_stat = REQ_STAT |
960 |
aio_lstat = REQ_LSTAT |
961 |
CODE: |
962 |
{ |
963 |
dREQ; |
964 |
|
965 |
New (0, req->statdata, 1, Stat_t); |
966 |
if (!req->statdata) |
967 |
{ |
968 |
free_req (req); |
969 |
croak ("out of memory during aio_req->statdata allocation"); |
970 |
} |
971 |
|
972 |
if (SvPOK (fh_or_path)) |
973 |
{ |
974 |
req->type = ix; |
975 |
req->data = newSVsv (fh_or_path); |
976 |
req->dataptr = SvPVbyte_nolen (req->data); |
977 |
} |
978 |
else |
979 |
{ |
980 |
req->type = REQ_FSTAT; |
981 |
req->fh = newSVsv (fh_or_path); |
982 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
983 |
} |
984 |
|
985 |
send_req (req); |
986 |
} |
987 |
|
988 |
void |
989 |
aio_unlink(pathname,callback=&PL_sv_undef) |
990 |
SV * pathname |
991 |
SV * callback |
992 |
ALIAS: |
993 |
aio_unlink = REQ_UNLINK |
994 |
aio_rmdir = REQ_RMDIR |
995 |
CODE: |
996 |
{ |
997 |
dREQ; |
998 |
|
999 |
req->type = ix; |
1000 |
req->data = newSVsv (pathname); |
1001 |
req->dataptr = SvPVbyte_nolen (req->data); |
1002 |
|
1003 |
send_req (req); |
1004 |
} |
1005 |
|
1006 |
void |
1007 |
aio_symlink(oldpath,newpath,callback=&PL_sv_undef) |
1008 |
SV * oldpath |
1009 |
SV * newpath |
1010 |
SV * callback |
1011 |
CODE: |
1012 |
{ |
1013 |
dREQ; |
1014 |
|
1015 |
req->type = REQ_SYMLINK; |
1016 |
req->fh = newSVsv (oldpath); |
1017 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
1018 |
req->data = newSVsv (newpath); |
1019 |
req->dataptr = SvPVbyte_nolen (req->data); |
1020 |
|
1021 |
send_req (req); |
1022 |
} |
1023 |
|
1024 |
void |
1025 |
aio_readdir(pathname,callback=&PL_sv_undef) |
1026 |
SV * pathname |
1027 |
SV * callback |
1028 |
CODE: |
1029 |
{ |
1030 |
dREQ; |
1031 |
|
1032 |
req->type = REQ_READDIR; |
1033 |
req->data = newSVsv (pathname); |
1034 |
req->dataptr = SvPVbyte_nolen (req->data); |
1035 |
|
1036 |
send_req (req); |
1037 |
} |
1038 |
|
1039 |
void |
1040 |
flush() |
1041 |
PROTOTYPE: |
1042 |
CODE: |
1043 |
while (nreqs) |
1044 |
{ |
1045 |
poll_wait (); |
1046 |
poll_cb (); |
1047 |
} |
1048 |
|
1049 |
void |
1050 |
poll() |
1051 |
PROTOTYPE: |
1052 |
CODE: |
1053 |
if (nreqs) |
1054 |
{ |
1055 |
poll_wait (); |
1056 |
poll_cb (); |
1057 |
} |
1058 |
|
1059 |
int |
1060 |
poll_fileno() |
1061 |
PROTOTYPE: |
1062 |
CODE: |
1063 |
RETVAL = respipe [0]; |
1064 |
OUTPUT: |
1065 |
RETVAL |
1066 |
|
1067 |
int |
1068 |
poll_cb(...) |
1069 |
PROTOTYPE: |
1070 |
CODE: |
1071 |
RETVAL = poll_cb (); |
1072 |
OUTPUT: |
1073 |
RETVAL |
1074 |
|
1075 |
void |
1076 |
poll_wait() |
1077 |
PROTOTYPE: |
1078 |
CODE: |
1079 |
if (nreqs) |
1080 |
poll_wait (); |
1081 |
|
1082 |
int |
1083 |
nreqs() |
1084 |
PROTOTYPE: |
1085 |
CODE: |
1086 |
RETVAL = nreqs; |
1087 |
OUTPUT: |
1088 |
RETVAL |
1089 |
|