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/time.h> |
15 |
#include <sys/select.h> |
16 |
#include <sys/types.h> |
17 |
#include <sys/stat.h> |
18 |
#include <limits.h> |
19 |
#include <unistd.h> |
20 |
#include <fcntl.h> |
21 |
#include <signal.h> |
22 |
#include <sched.h> |
23 |
|
24 |
#if HAVE_SENDFILE |
25 |
# if __linux |
26 |
# include <sys/sendfile.h> |
27 |
# elif __freebsd |
28 |
# include <sys/socket.h> |
29 |
# include <sys/uio.h> |
30 |
# elif __hpux |
31 |
# include <sys/socket.h> |
32 |
# elif __solaris /* not yet */ |
33 |
# include <sys/sendfile.h> |
34 |
# else |
35 |
# error sendfile support requested but not available |
36 |
# endif |
37 |
#endif |
38 |
|
39 |
/* used for struct dirent, AIX doesn't provide it */ |
40 |
#ifndef NAME_MAX |
41 |
# define NAME_MAX 4096 |
42 |
#endif |
43 |
|
44 |
#if __ia64 |
45 |
# define STACKSIZE 65536 |
46 |
#else |
47 |
# define STACKSIZE 8192 |
48 |
#endif |
49 |
|
50 |
enum { |
51 |
REQ_QUIT, |
52 |
REQ_OPEN, REQ_CLOSE, |
53 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
54 |
REQ_SENDFILE, |
55 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
56 |
REQ_FSYNC, REQ_FDATASYNC, |
57 |
REQ_UNLINK, REQ_RMDIR, REQ_RENAME, |
58 |
REQ_READDIR, |
59 |
REQ_LINK, REQ_SYMLINK, |
60 |
REQ_SLEEP, |
61 |
REQ_GROUP, |
62 |
}; |
63 |
|
64 |
#define AIO_REQ_KLASS "IO::AIO::REQ" |
65 |
#define AIO_GRP_KLASS "IO::AIO::GRP" |
66 |
|
67 |
typedef struct aio_cb |
68 |
{ |
69 |
struct aio_cb *grp, *grp_prev, *grp_next; |
70 |
|
71 |
struct aio_cb *volatile next; |
72 |
|
73 |
SV *self; /* the perl counterpart of this request, if any */ |
74 |
|
75 |
SV *data, *callback; |
76 |
SV *fh, *fh2; |
77 |
void *dataptr, *data2ptr; |
78 |
Stat_t *statdata; |
79 |
off_t offset; |
80 |
size_t length; |
81 |
ssize_t result; |
82 |
|
83 |
int type; |
84 |
int fd, fd2; |
85 |
int errorno; |
86 |
STRLEN dataoffset; |
87 |
mode_t mode; /* open */ |
88 |
unsigned char cancelled; |
89 |
} aio_cb; |
90 |
|
91 |
typedef aio_cb *aio_req; |
92 |
typedef aio_cb *aio_req_ornot; |
93 |
|
94 |
static int started, wanted; |
95 |
static volatile int nreqs; |
96 |
static int max_outstanding = 1<<30; |
97 |
static int respipe [2]; |
98 |
|
99 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
100 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
101 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
102 |
|
103 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
104 |
static volatile aio_req ress, rese; /* queue start, queue end */ |
105 |
|
106 |
static void req_free (aio_req req); |
107 |
|
108 |
/* must be called at most once */ |
109 |
static SV *req_sv (aio_req req, const char *klass) |
110 |
{ |
111 |
req->self = (SV *)newHV (); |
112 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
113 |
|
114 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
115 |
} |
116 |
|
117 |
static aio_req SvAIO_REQ (SV *sv) |
118 |
{ |
119 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
120 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
121 |
|
122 |
MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
123 |
|
124 |
return mg ? (aio_req)mg->mg_ptr : 0; |
125 |
} |
126 |
|
127 |
static void poll_wait () |
128 |
{ |
129 |
if (nreqs && !ress) |
130 |
{ |
131 |
fd_set rfd; |
132 |
FD_ZERO(&rfd); |
133 |
FD_SET(respipe [0], &rfd); |
134 |
|
135 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
136 |
} |
137 |
} |
138 |
|
139 |
static void req_invoke (aio_req req) |
140 |
{ |
141 |
dSP; |
142 |
int errorno = errno; |
143 |
|
144 |
if (req->cancelled || !SvOK (req->callback)) |
145 |
return; |
146 |
|
147 |
errno = req->errorno; |
148 |
|
149 |
ENTER; |
150 |
PUSHMARK (SP); |
151 |
|
152 |
switch (req->type) |
153 |
{ |
154 |
case REQ_READDIR: |
155 |
{ |
156 |
SV *rv = &PL_sv_undef; |
157 |
|
158 |
if (req->result >= 0) |
159 |
{ |
160 |
char *buf = req->data2ptr; |
161 |
AV *av = newAV (); |
162 |
|
163 |
while (req->result) |
164 |
{ |
165 |
SV *sv = newSVpv (buf, 0); |
166 |
|
167 |
av_push (av, sv); |
168 |
buf += SvCUR (sv) + 1; |
169 |
req->result--; |
170 |
} |
171 |
|
172 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
173 |
} |
174 |
|
175 |
XPUSHs (rv); |
176 |
} |
177 |
break; |
178 |
|
179 |
case REQ_OPEN: |
180 |
{ |
181 |
/* convert fd to fh */ |
182 |
SV *fh; |
183 |
|
184 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
185 |
PUTBACK; |
186 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
187 |
SPAGAIN; |
188 |
|
189 |
fh = SvREFCNT_inc (POPs); |
190 |
|
191 |
PUSHMARK (SP); |
192 |
XPUSHs (sv_2mortal (fh)); |
193 |
} |
194 |
break; |
195 |
|
196 |
case REQ_SLEEP: |
197 |
case REQ_GROUP: |
198 |
break; |
199 |
|
200 |
default: |
201 |
XPUSHs (sv_2mortal (newSViv (req->result))); |
202 |
break; |
203 |
} |
204 |
|
205 |
|
206 |
PUTBACK; |
207 |
call_sv (req->callback, G_VOID | G_EVAL); |
208 |
SPAGAIN; |
209 |
|
210 |
if (SvTRUE (ERRSV)) |
211 |
{ |
212 |
req_free (req); |
213 |
croak (0); |
214 |
} |
215 |
|
216 |
LEAVE; |
217 |
|
218 |
errno = errorno; |
219 |
} |
220 |
|
221 |
static void req_free (aio_req req) |
222 |
{ |
223 |
if (req->grp) |
224 |
{ |
225 |
aio_req grp = req->grp; |
226 |
|
227 |
/* unlink request */ |
228 |
req->grp_next->grp_prev = req->grp_prev; |
229 |
req->grp_prev->grp_next = req->grp_next; |
230 |
|
231 |
if (grp->grp_next == grp && grp->fd) |
232 |
{ |
233 |
req_invoke (grp); |
234 |
req_free (grp); |
235 |
} |
236 |
} |
237 |
|
238 |
if (req->self) |
239 |
{ |
240 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
241 |
SvREFCNT_dec (req->self); |
242 |
} |
243 |
|
244 |
if (req->data) |
245 |
SvREFCNT_dec (req->data); |
246 |
|
247 |
if (req->fh) |
248 |
SvREFCNT_dec (req->fh); |
249 |
|
250 |
if (req->fh2) |
251 |
SvREFCNT_dec (req->fh2); |
252 |
|
253 |
if (req->statdata) |
254 |
Safefree (req->statdata); |
255 |
|
256 |
if (req->callback) |
257 |
SvREFCNT_dec (req->callback); |
258 |
|
259 |
if (req->type == REQ_READDIR && req->result >= 0) |
260 |
free (req->data2ptr); |
261 |
|
262 |
Safefree (req); |
263 |
} |
264 |
|
265 |
static void req_cancel (aio_req req) |
266 |
{ |
267 |
req->cancelled = 1; |
268 |
|
269 |
if (req->type == REQ_GROUP) |
270 |
{ |
271 |
aio_req sub; |
272 |
|
273 |
for (sub = req->grp_next; sub != req; sub = sub->grp_next) |
274 |
req_cancel (sub); |
275 |
} |
276 |
} |
277 |
|
278 |
static int poll_cb () |
279 |
{ |
280 |
dSP; |
281 |
int count = 0; |
282 |
int do_croak = 0; |
283 |
aio_req req; |
284 |
|
285 |
for (;;) |
286 |
{ |
287 |
pthread_mutex_lock (&reslock); |
288 |
req = ress; |
289 |
|
290 |
if (req) |
291 |
{ |
292 |
ress = req->next; |
293 |
|
294 |
if (!ress) |
295 |
{ |
296 |
/* read any signals sent by the worker threads */ |
297 |
char buf [32]; |
298 |
while (read (respipe [0], buf, 32) == 32) |
299 |
; |
300 |
|
301 |
rese = 0; |
302 |
} |
303 |
} |
304 |
|
305 |
pthread_mutex_unlock (&reslock); |
306 |
|
307 |
if (!req) |
308 |
break; |
309 |
|
310 |
nreqs--; |
311 |
|
312 |
if (req->type == REQ_QUIT) |
313 |
started--; |
314 |
else if (req->type == REQ_GROUP && req->grp_next != req) |
315 |
{ |
316 |
req->fd = 1; /* mark request as delayed */ |
317 |
continue; |
318 |
} |
319 |
else |
320 |
{ |
321 |
if (req->type == REQ_READ) |
322 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
323 |
|
324 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
325 |
SvREADONLY_off (req->data); |
326 |
|
327 |
if (req->statdata) |
328 |
{ |
329 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
330 |
PL_laststatval = req->result; |
331 |
PL_statcache = *(req->statdata); |
332 |
} |
333 |
|
334 |
req_invoke (req); |
335 |
|
336 |
count++; |
337 |
} |
338 |
|
339 |
req_free (req); |
340 |
} |
341 |
|
342 |
return count; |
343 |
} |
344 |
|
345 |
static void *aio_proc(void *arg); |
346 |
|
347 |
static void start_thread (void) |
348 |
{ |
349 |
sigset_t fullsigset, oldsigset; |
350 |
pthread_t tid; |
351 |
pthread_attr_t attr; |
352 |
|
353 |
pthread_attr_init (&attr); |
354 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
355 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
356 |
|
357 |
sigfillset (&fullsigset); |
358 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
359 |
|
360 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
361 |
started++; |
362 |
|
363 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
364 |
} |
365 |
|
366 |
static void req_send (aio_req req) |
367 |
{ |
368 |
while (started < wanted && nreqs >= started) |
369 |
start_thread (); |
370 |
|
371 |
nreqs++; |
372 |
|
373 |
pthread_mutex_lock (&reqlock); |
374 |
|
375 |
req->next = 0; |
376 |
|
377 |
if (reqe) |
378 |
{ |
379 |
reqe->next = req; |
380 |
reqe = req; |
381 |
} |
382 |
else |
383 |
reqe = reqs = req; |
384 |
|
385 |
pthread_cond_signal (&reqwait); |
386 |
pthread_mutex_unlock (&reqlock); |
387 |
|
388 |
if (nreqs > max_outstanding) |
389 |
for (;;) |
390 |
{ |
391 |
poll_cb (); |
392 |
|
393 |
if (nreqs <= max_outstanding) |
394 |
break; |
395 |
|
396 |
poll_wait (); |
397 |
} |
398 |
} |
399 |
|
400 |
static void end_thread (void) |
401 |
{ |
402 |
aio_req req; |
403 |
Newz (0, req, 1, aio_cb); |
404 |
req->type = REQ_QUIT; |
405 |
|
406 |
req_send (req); |
407 |
} |
408 |
|
409 |
static void min_parallel (int nthreads) |
410 |
{ |
411 |
if (wanted < nthreads) |
412 |
wanted = nthreads; |
413 |
} |
414 |
|
415 |
static void max_parallel (int nthreads) |
416 |
{ |
417 |
int cur = started; |
418 |
|
419 |
if (wanted > nthreads) |
420 |
wanted = nthreads; |
421 |
|
422 |
while (cur > wanted) |
423 |
{ |
424 |
end_thread (); |
425 |
cur--; |
426 |
} |
427 |
|
428 |
while (started > wanted) |
429 |
{ |
430 |
poll_wait (); |
431 |
poll_cb (); |
432 |
} |
433 |
} |
434 |
|
435 |
static void create_pipe () |
436 |
{ |
437 |
if (pipe (respipe)) |
438 |
croak ("unable to initialize result pipe"); |
439 |
|
440 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
441 |
croak ("cannot set result pipe to nonblocking mode"); |
442 |
|
443 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
444 |
croak ("cannot set result pipe to nonblocking mode"); |
445 |
} |
446 |
|
447 |
/*****************************************************************************/ |
448 |
/* work around various missing functions */ |
449 |
|
450 |
#if !HAVE_PREADWRITE |
451 |
# define pread aio_pread |
452 |
# define pwrite aio_pwrite |
453 |
|
454 |
/* |
455 |
* make our pread/pwrite safe against themselves, but not against |
456 |
* normal read/write by using a mutex. slows down execution a lot, |
457 |
* but that's your problem, not mine. |
458 |
*/ |
459 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
460 |
|
461 |
static ssize_t pread (int fd, void *buf, size_t count, off_t offset) |
462 |
{ |
463 |
ssize_t res; |
464 |
off_t ooffset; |
465 |
|
466 |
pthread_mutex_lock (&preadwritelock); |
467 |
ooffset = lseek (fd, 0, SEEK_CUR); |
468 |
lseek (fd, offset, SEEK_SET); |
469 |
res = read (fd, buf, count); |
470 |
lseek (fd, ooffset, SEEK_SET); |
471 |
pthread_mutex_unlock (&preadwritelock); |
472 |
|
473 |
return res; |
474 |
} |
475 |
|
476 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
477 |
{ |
478 |
ssize_t res; |
479 |
off_t ooffset; |
480 |
|
481 |
pthread_mutex_lock (&preadwritelock); |
482 |
ooffset = lseek (fd, 0, SEEK_CUR); |
483 |
lseek (fd, offset, SEEK_SET); |
484 |
res = write (fd, buf, count); |
485 |
lseek (fd, offset, SEEK_SET); |
486 |
pthread_mutex_unlock (&preadwritelock); |
487 |
|
488 |
return res; |
489 |
} |
490 |
#endif |
491 |
|
492 |
#if !HAVE_FDATASYNC |
493 |
# define fdatasync fsync |
494 |
#endif |
495 |
|
496 |
#if !HAVE_READAHEAD |
497 |
# define readahead aio_readahead |
498 |
|
499 |
static ssize_t readahead (int fd, off_t offset, size_t count) |
500 |
{ |
501 |
char readahead_buf[4096]; |
502 |
|
503 |
while (count > 0) |
504 |
{ |
505 |
size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); |
506 |
|
507 |
pread (fd, readahead_buf, len, offset); |
508 |
offset += len; |
509 |
count -= len; |
510 |
} |
511 |
|
512 |
errno = 0; |
513 |
} |
514 |
#endif |
515 |
|
516 |
#if !HAVE_READDIR_R |
517 |
# define readdir_r aio_readdir_r |
518 |
|
519 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
520 |
|
521 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
522 |
{ |
523 |
struct dirent *e; |
524 |
int errorno; |
525 |
|
526 |
pthread_mutex_lock (&readdirlock); |
527 |
|
528 |
e = readdir (dirp); |
529 |
errorno = errno; |
530 |
|
531 |
if (e) |
532 |
{ |
533 |
*res = ent; |
534 |
strcpy (ent->d_name, e->d_name); |
535 |
} |
536 |
else |
537 |
*res = 0; |
538 |
|
539 |
pthread_mutex_unlock (&readdirlock); |
540 |
|
541 |
errno = errorno; |
542 |
return e ? 0 : -1; |
543 |
} |
544 |
#endif |
545 |
|
546 |
/* sendfile always needs emulation */ |
547 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count) |
548 |
{ |
549 |
ssize_t res; |
550 |
|
551 |
if (!count) |
552 |
return 0; |
553 |
|
554 |
#if HAVE_SENDFILE |
555 |
# if __linux |
556 |
res = sendfile (ofd, ifd, &offset, count); |
557 |
|
558 |
# elif __freebsd |
559 |
/* |
560 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
561 |
* wasted on making it similar to other I/O functions. |
562 |
*/ |
563 |
{ |
564 |
off_t sbytes; |
565 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
566 |
|
567 |
if (res < 0 && sbytes) |
568 |
/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */ |
569 |
res = sbytes; |
570 |
} |
571 |
|
572 |
# elif __hpux |
573 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
574 |
|
575 |
# elif __solaris |
576 |
{ |
577 |
struct sendfilevec vec; |
578 |
size_t sbytes; |
579 |
|
580 |
vec.sfv_fd = ifd; |
581 |
vec.sfv_flag = 0; |
582 |
vec.sfv_off = offset; |
583 |
vec.sfv_len = count; |
584 |
|
585 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
586 |
|
587 |
if (res < 0 && sbytes) |
588 |
res = sbytes; |
589 |
} |
590 |
|
591 |
# endif |
592 |
#else |
593 |
res = -1; |
594 |
errno = ENOSYS; |
595 |
#endif |
596 |
|
597 |
if (res < 0 |
598 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
599 |
#if __solaris |
600 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
601 |
#endif |
602 |
) |
603 |
) |
604 |
{ |
605 |
/* emulate sendfile. this is a major pain in the ass */ |
606 |
char buf[4096]; |
607 |
res = 0; |
608 |
|
609 |
while (count) |
610 |
{ |
611 |
ssize_t cnt; |
612 |
|
613 |
cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset); |
614 |
|
615 |
if (cnt <= 0) |
616 |
{ |
617 |
if (cnt && !res) res = -1; |
618 |
break; |
619 |
} |
620 |
|
621 |
cnt = write (ofd, buf, cnt); |
622 |
|
623 |
if (cnt <= 0) |
624 |
{ |
625 |
if (cnt && !res) res = -1; |
626 |
break; |
627 |
} |
628 |
|
629 |
offset += cnt; |
630 |
res += cnt; |
631 |
count -= cnt; |
632 |
} |
633 |
} |
634 |
|
635 |
return res; |
636 |
} |
637 |
|
638 |
/* read a full directory */ |
639 |
static int scandir_ (const char *path, void **namesp) |
640 |
{ |
641 |
DIR *dirp = opendir (path); |
642 |
union |
643 |
{ |
644 |
struct dirent d; |
645 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
646 |
} u; |
647 |
struct dirent *entp; |
648 |
char *name, *names; |
649 |
int memlen = 4096; |
650 |
int memofs = 0; |
651 |
int res = 0; |
652 |
int errorno; |
653 |
|
654 |
if (!dirp) |
655 |
return -1; |
656 |
|
657 |
names = malloc (memlen); |
658 |
|
659 |
for (;;) |
660 |
{ |
661 |
errno = 0, readdir_r (dirp, &u.d, &entp); |
662 |
|
663 |
if (!entp) |
664 |
break; |
665 |
|
666 |
name = entp->d_name; |
667 |
|
668 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
669 |
{ |
670 |
int len = strlen (name) + 1; |
671 |
|
672 |
res++; |
673 |
|
674 |
while (memofs + len > memlen) |
675 |
{ |
676 |
memlen *= 2; |
677 |
names = realloc (names, memlen); |
678 |
if (!names) |
679 |
break; |
680 |
} |
681 |
|
682 |
memcpy (names + memofs, name, len); |
683 |
memofs += len; |
684 |
} |
685 |
} |
686 |
|
687 |
errorno = errno; |
688 |
closedir (dirp); |
689 |
|
690 |
if (errorno) |
691 |
{ |
692 |
free (names); |
693 |
errno = errorno; |
694 |
res = -1; |
695 |
} |
696 |
|
697 |
*namesp = (void *)names; |
698 |
return res; |
699 |
} |
700 |
|
701 |
/*****************************************************************************/ |
702 |
|
703 |
static void *aio_proc (void *thr_arg) |
704 |
{ |
705 |
aio_req req; |
706 |
int type; |
707 |
|
708 |
do |
709 |
{ |
710 |
pthread_mutex_lock (&reqlock); |
711 |
|
712 |
for (;;) |
713 |
{ |
714 |
req = reqs; |
715 |
|
716 |
if (reqs) |
717 |
{ |
718 |
reqs = reqs->next; |
719 |
if (!reqs) reqe = 0; |
720 |
} |
721 |
|
722 |
if (req) |
723 |
break; |
724 |
|
725 |
pthread_cond_wait (&reqwait, &reqlock); |
726 |
} |
727 |
|
728 |
pthread_mutex_unlock (&reqlock); |
729 |
|
730 |
errno = 0; /* strictly unnecessary */ |
731 |
|
732 |
if (!req->cancelled) |
733 |
switch (req->type) |
734 |
{ |
735 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
736 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
737 |
|
738 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
739 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break; |
740 |
|
741 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
742 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
743 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
744 |
|
745 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
746 |
case REQ_CLOSE: req->result = close (req->fd); break; |
747 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
748 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
749 |
case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; |
750 |
case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; |
751 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
752 |
|
753 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
754 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
755 |
case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break; |
756 |
|
757 |
case REQ_SLEEP: |
758 |
{ |
759 |
struct timeval tv; |
760 |
|
761 |
tv.tv_sec = req->fd; |
762 |
tv.tv_usec = req->fd2; |
763 |
|
764 |
req->result = select (0, 0, 0, 0, &tv); |
765 |
} |
766 |
|
767 |
case REQ_QUIT: |
768 |
break; |
769 |
|
770 |
default: |
771 |
req->result = ENOSYS; |
772 |
break; |
773 |
} |
774 |
|
775 |
req->errorno = errno; |
776 |
|
777 |
pthread_mutex_lock (&reslock); |
778 |
|
779 |
req->next = 0; |
780 |
|
781 |
if (rese) |
782 |
{ |
783 |
rese->next = req; |
784 |
rese = req; |
785 |
} |
786 |
else |
787 |
{ |
788 |
rese = ress = req; |
789 |
|
790 |
/* write a dummy byte to the pipe so fh becomes ready */ |
791 |
write (respipe [1], &respipe, 1); |
792 |
} |
793 |
|
794 |
pthread_mutex_unlock (&reslock); |
795 |
} |
796 |
while (type != REQ_QUIT); |
797 |
|
798 |
return 0; |
799 |
} |
800 |
|
801 |
/*****************************************************************************/ |
802 |
|
803 |
static void atfork_prepare (void) |
804 |
{ |
805 |
pthread_mutex_lock (&reqlock); |
806 |
pthread_mutex_lock (&reslock); |
807 |
#if !HAVE_PREADWRITE |
808 |
pthread_mutex_lock (&preadwritelock); |
809 |
#endif |
810 |
#if !HAVE_READDIR_R |
811 |
pthread_mutex_lock (&readdirlock); |
812 |
#endif |
813 |
} |
814 |
|
815 |
static void atfork_parent (void) |
816 |
{ |
817 |
#if !HAVE_READDIR_R |
818 |
pthread_mutex_unlock (&readdirlock); |
819 |
#endif |
820 |
#if !HAVE_PREADWRITE |
821 |
pthread_mutex_unlock (&preadwritelock); |
822 |
#endif |
823 |
pthread_mutex_unlock (&reslock); |
824 |
pthread_mutex_unlock (&reqlock); |
825 |
} |
826 |
|
827 |
static void atfork_child (void) |
828 |
{ |
829 |
aio_req prv; |
830 |
|
831 |
started = 0; |
832 |
|
833 |
while (reqs) |
834 |
{ |
835 |
prv = reqs; |
836 |
reqs = prv->next; |
837 |
req_free (prv); |
838 |
} |
839 |
|
840 |
reqs = reqe = 0; |
841 |
|
842 |
while (ress) |
843 |
{ |
844 |
prv = ress; |
845 |
ress = prv->next; |
846 |
req_free (prv); |
847 |
} |
848 |
|
849 |
ress = rese = 0; |
850 |
|
851 |
close (respipe [0]); |
852 |
close (respipe [1]); |
853 |
create_pipe (); |
854 |
|
855 |
atfork_parent (); |
856 |
} |
857 |
|
858 |
#define dREQ \ |
859 |
aio_req req; \ |
860 |
\ |
861 |
if (SvOK (callback) && !SvROK (callback)) \ |
862 |
croak ("callback must be undef or of reference type"); \ |
863 |
\ |
864 |
Newz (0, req, 1, aio_cb); \ |
865 |
if (!req) \ |
866 |
croak ("out of memory during aio_req allocation"); \ |
867 |
\ |
868 |
req->callback = newSVsv (callback) |
869 |
|
870 |
#define REQ_SEND \ |
871 |
req_send (req); \ |
872 |
\ |
873 |
if (GIMME_V != G_VOID) \ |
874 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
875 |
|
876 |
MODULE = IO::AIO PACKAGE = IO::AIO |
877 |
|
878 |
PROTOTYPES: ENABLE |
879 |
|
880 |
BOOT: |
881 |
{ |
882 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
883 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
884 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
885 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
886 |
|
887 |
create_pipe (); |
888 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
889 |
} |
890 |
|
891 |
void |
892 |
min_parallel (nthreads) |
893 |
int nthreads |
894 |
PROTOTYPE: $ |
895 |
|
896 |
void |
897 |
max_parallel (nthreads) |
898 |
int nthreads |
899 |
PROTOTYPE: $ |
900 |
|
901 |
int |
902 |
max_outstanding (nreqs) |
903 |
int nreqs |
904 |
PROTOTYPE: $ |
905 |
CODE: |
906 |
RETVAL = max_outstanding; |
907 |
max_outstanding = nreqs; |
908 |
|
909 |
void |
910 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
911 |
SV * pathname |
912 |
int flags |
913 |
int mode |
914 |
SV * callback |
915 |
PROTOTYPE: $$$;$ |
916 |
PPCODE: |
917 |
{ |
918 |
dREQ; |
919 |
|
920 |
req->type = REQ_OPEN; |
921 |
req->data = newSVsv (pathname); |
922 |
req->dataptr = SvPVbyte_nolen (req->data); |
923 |
req->fd = flags; |
924 |
req->mode = mode; |
925 |
|
926 |
REQ_SEND; |
927 |
} |
928 |
|
929 |
void |
930 |
aio_close (fh,callback=&PL_sv_undef) |
931 |
SV * fh |
932 |
SV * callback |
933 |
PROTOTYPE: $;$ |
934 |
ALIAS: |
935 |
aio_close = REQ_CLOSE |
936 |
aio_fsync = REQ_FSYNC |
937 |
aio_fdatasync = REQ_FDATASYNC |
938 |
PPCODE: |
939 |
{ |
940 |
dREQ; |
941 |
|
942 |
req->type = ix; |
943 |
req->fh = newSVsv (fh); |
944 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
945 |
|
946 |
REQ_SEND (req); |
947 |
} |
948 |
|
949 |
void |
950 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
951 |
SV * fh |
952 |
UV offset |
953 |
UV length |
954 |
SV * data |
955 |
UV dataoffset |
956 |
SV * callback |
957 |
ALIAS: |
958 |
aio_read = REQ_READ |
959 |
aio_write = REQ_WRITE |
960 |
PROTOTYPE: $$$$$;$ |
961 |
PPCODE: |
962 |
{ |
963 |
aio_req req; |
964 |
STRLEN svlen; |
965 |
char *svptr = SvPVbyte (data, svlen); |
966 |
|
967 |
SvUPGRADE (data, SVt_PV); |
968 |
SvPOK_on (data); |
969 |
|
970 |
if (dataoffset < 0) |
971 |
dataoffset += svlen; |
972 |
|
973 |
if (dataoffset < 0 || dataoffset > svlen) |
974 |
croak ("data offset outside of string"); |
975 |
|
976 |
if (ix == REQ_WRITE) |
977 |
{ |
978 |
/* write: check length and adjust. */ |
979 |
if (length < 0 || length + dataoffset > svlen) |
980 |
length = svlen - dataoffset; |
981 |
} |
982 |
else |
983 |
{ |
984 |
/* read: grow scalar as necessary */ |
985 |
svptr = SvGROW (data, length + dataoffset); |
986 |
} |
987 |
|
988 |
if (length < 0) |
989 |
croak ("length must not be negative"); |
990 |
|
991 |
{ |
992 |
dREQ; |
993 |
|
994 |
req->type = ix; |
995 |
req->fh = newSVsv (fh); |
996 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
997 |
: IoOFP (sv_2io (fh))); |
998 |
req->offset = offset; |
999 |
req->length = length; |
1000 |
req->data = SvREFCNT_inc (data); |
1001 |
req->dataptr = (char *)svptr + dataoffset; |
1002 |
|
1003 |
if (!SvREADONLY (data)) |
1004 |
{ |
1005 |
SvREADONLY_on (data); |
1006 |
req->data2ptr = (void *)data; |
1007 |
} |
1008 |
|
1009 |
REQ_SEND; |
1010 |
} |
1011 |
} |
1012 |
|
1013 |
void |
1014 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
1015 |
SV * out_fh |
1016 |
SV * in_fh |
1017 |
UV in_offset |
1018 |
UV length |
1019 |
SV * callback |
1020 |
PROTOTYPE: $$$$;$ |
1021 |
PPCODE: |
1022 |
{ |
1023 |
dREQ; |
1024 |
|
1025 |
req->type = REQ_SENDFILE; |
1026 |
req->fh = newSVsv (out_fh); |
1027 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
1028 |
req->fh2 = newSVsv (in_fh); |
1029 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
1030 |
req->offset = in_offset; |
1031 |
req->length = length; |
1032 |
|
1033 |
REQ_SEND; |
1034 |
} |
1035 |
|
1036 |
void |
1037 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
1038 |
SV * fh |
1039 |
UV offset |
1040 |
IV length |
1041 |
SV * callback |
1042 |
PROTOTYPE: $$$;$ |
1043 |
PPCODE: |
1044 |
{ |
1045 |
dREQ; |
1046 |
|
1047 |
req->type = REQ_READAHEAD; |
1048 |
req->fh = newSVsv (fh); |
1049 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1050 |
req->offset = offset; |
1051 |
req->length = length; |
1052 |
|
1053 |
REQ_SEND; |
1054 |
} |
1055 |
|
1056 |
void |
1057 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
1058 |
SV * fh_or_path |
1059 |
SV * callback |
1060 |
ALIAS: |
1061 |
aio_stat = REQ_STAT |
1062 |
aio_lstat = REQ_LSTAT |
1063 |
PPCODE: |
1064 |
{ |
1065 |
dREQ; |
1066 |
|
1067 |
New (0, req->statdata, 1, Stat_t); |
1068 |
if (!req->statdata) |
1069 |
{ |
1070 |
req_free (req); |
1071 |
croak ("out of memory during aio_req->statdata allocation"); |
1072 |
} |
1073 |
|
1074 |
if (SvPOK (fh_or_path)) |
1075 |
{ |
1076 |
req->type = ix; |
1077 |
req->data = newSVsv (fh_or_path); |
1078 |
req->dataptr = SvPVbyte_nolen (req->data); |
1079 |
} |
1080 |
else |
1081 |
{ |
1082 |
req->type = REQ_FSTAT; |
1083 |
req->fh = newSVsv (fh_or_path); |
1084 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1085 |
} |
1086 |
|
1087 |
REQ_SEND; |
1088 |
} |
1089 |
|
1090 |
void |
1091 |
aio_unlink (pathname,callback=&PL_sv_undef) |
1092 |
SV * pathname |
1093 |
SV * callback |
1094 |
ALIAS: |
1095 |
aio_unlink = REQ_UNLINK |
1096 |
aio_rmdir = REQ_RMDIR |
1097 |
aio_readdir = REQ_READDIR |
1098 |
PPCODE: |
1099 |
{ |
1100 |
dREQ; |
1101 |
|
1102 |
req->type = ix; |
1103 |
req->data = newSVsv (pathname); |
1104 |
req->dataptr = SvPVbyte_nolen (req->data); |
1105 |
|
1106 |
REQ_SEND; |
1107 |
} |
1108 |
|
1109 |
void |
1110 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
1111 |
SV * oldpath |
1112 |
SV * newpath |
1113 |
SV * callback |
1114 |
ALIAS: |
1115 |
aio_link = REQ_LINK |
1116 |
aio_symlink = REQ_SYMLINK |
1117 |
aio_rename = REQ_RENAME |
1118 |
PPCODE: |
1119 |
{ |
1120 |
dREQ; |
1121 |
|
1122 |
req->type = ix; |
1123 |
req->fh = newSVsv (oldpath); |
1124 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
1125 |
req->data = newSVsv (newpath); |
1126 |
req->dataptr = SvPVbyte_nolen (req->data); |
1127 |
|
1128 |
REQ_SEND; |
1129 |
} |
1130 |
|
1131 |
void |
1132 |
aio_sleep (delay,callback=&PL_sv_undef) |
1133 |
double delay |
1134 |
SV * callback |
1135 |
PPCODE: |
1136 |
{ |
1137 |
dREQ; |
1138 |
|
1139 |
req->type = REQ_SLEEP; |
1140 |
req->fd = delay < 0. ? 0 : delay; |
1141 |
req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd); |
1142 |
|
1143 |
REQ_SEND; |
1144 |
} |
1145 |
|
1146 |
void |
1147 |
aio_group (callback=&PL_sv_undef) |
1148 |
SV * callback |
1149 |
PROTOTYPE: ;$ |
1150 |
PPCODE: |
1151 |
{ |
1152 |
dREQ; |
1153 |
req->type = REQ_GROUP; |
1154 |
req->grp_next = req; |
1155 |
req->grp_prev = req; |
1156 |
|
1157 |
req_send (req); |
1158 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
1159 |
} |
1160 |
|
1161 |
void |
1162 |
flush () |
1163 |
PROTOTYPE: |
1164 |
CODE: |
1165 |
while (nreqs) |
1166 |
{ |
1167 |
poll_wait (); |
1168 |
poll_cb (); |
1169 |
} |
1170 |
|
1171 |
void |
1172 |
poll() |
1173 |
PROTOTYPE: |
1174 |
CODE: |
1175 |
if (nreqs) |
1176 |
{ |
1177 |
poll_wait (); |
1178 |
poll_cb (); |
1179 |
} |
1180 |
|
1181 |
int |
1182 |
poll_fileno() |
1183 |
PROTOTYPE: |
1184 |
CODE: |
1185 |
RETVAL = respipe [0]; |
1186 |
OUTPUT: |
1187 |
RETVAL |
1188 |
|
1189 |
int |
1190 |
poll_cb(...) |
1191 |
PROTOTYPE: |
1192 |
CODE: |
1193 |
RETVAL = poll_cb (); |
1194 |
OUTPUT: |
1195 |
RETVAL |
1196 |
|
1197 |
void |
1198 |
poll_wait() |
1199 |
PROTOTYPE: |
1200 |
CODE: |
1201 |
if (nreqs) |
1202 |
poll_wait (); |
1203 |
|
1204 |
int |
1205 |
nreqs() |
1206 |
PROTOTYPE: |
1207 |
CODE: |
1208 |
RETVAL = nreqs; |
1209 |
OUTPUT: |
1210 |
RETVAL |
1211 |
|
1212 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
1213 |
|
1214 |
void |
1215 |
cancel (aio_req_ornot req) |
1216 |
PROTOTYPE: |
1217 |
CODE: |
1218 |
req_cancel (req); |
1219 |
|
1220 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
1221 |
|
1222 |
void |
1223 |
add (aio_req grp, ...) |
1224 |
PROTOTYPE: $;@ |
1225 |
PPCODE: |
1226 |
{ |
1227 |
int i; |
1228 |
|
1229 |
for (i = 1; i < items; ++i ) |
1230 |
{ |
1231 |
if (GIMME_V != G_VOID) |
1232 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
1233 |
|
1234 |
aio_req req = SvAIO_REQ (ST (i)); |
1235 |
printf ("req = %p\n", req);//D |
1236 |
|
1237 |
if (req) |
1238 |
{ |
1239 |
req->grp_prev = grp; |
1240 |
req->grp_next = grp->grp_next; |
1241 |
grp->grp_next->grp_prev = req; |
1242 |
grp->grp_next = req; |
1243 |
|
1244 |
req->grp = grp; |
1245 |
} |
1246 |
} |
1247 |
} |
1248 |
|