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 *volatile next; |
70 |
|
71 |
struct aio_cb *grp, *grp_prev, *grp_next, *grp_first; |
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 |
if (!req->self) |
112 |
{ |
113 |
req->self = (SV *)newHV (); |
114 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
115 |
} |
116 |
|
117 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
118 |
} |
119 |
|
120 |
static aio_req SvAIO_REQ (SV *sv) |
121 |
{ |
122 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
123 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
124 |
|
125 |
MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
126 |
|
127 |
return mg ? (aio_req)mg->mg_ptr : 0; |
128 |
} |
129 |
|
130 |
static void aio_grp_feed (aio_req grp) |
131 |
{ |
132 |
while (grp->length < grp->fd2) |
133 |
{ |
134 |
int old_len = grp->length; |
135 |
|
136 |
if (grp->fh2 && SvOK (grp->fh2)) |
137 |
{ |
138 |
dSP; |
139 |
|
140 |
ENTER; |
141 |
SAVETMPS; |
142 |
PUSHMARK (SP); |
143 |
XPUSHs (req_sv (grp, AIO_GRP_KLASS)); |
144 |
PUTBACK; |
145 |
call_sv (grp->fh2, G_VOID | G_EVAL); |
146 |
SPAGAIN; |
147 |
FREETMPS; |
148 |
LEAVE; |
149 |
} |
150 |
|
151 |
/* stop if no progress has been made */ |
152 |
if (old_len == grp->length) |
153 |
{ |
154 |
SvREFCNT_dec (grp->fh2); |
155 |
grp->fh2 = 0; |
156 |
break; |
157 |
} |
158 |
} |
159 |
} |
160 |
|
161 |
static void poll_wait () |
162 |
{ |
163 |
if (nreqs && !ress) |
164 |
{ |
165 |
fd_set rfd; |
166 |
FD_ZERO(&rfd); |
167 |
FD_SET(respipe [0], &rfd); |
168 |
|
169 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
170 |
} |
171 |
} |
172 |
|
173 |
static void req_invoke (aio_req req) |
174 |
{ |
175 |
dSP; |
176 |
int errorno = errno; |
177 |
|
178 |
if (req->cancelled || !SvOK (req->callback)) |
179 |
return; |
180 |
|
181 |
errno = req->errorno; |
182 |
|
183 |
ENTER; |
184 |
SAVETMPS; |
185 |
PUSHMARK (SP); |
186 |
EXTEND (SP, 1); |
187 |
|
188 |
switch (req->type) |
189 |
{ |
190 |
case REQ_READDIR: |
191 |
{ |
192 |
SV *rv = &PL_sv_undef; |
193 |
|
194 |
if (req->result >= 0) |
195 |
{ |
196 |
char *buf = req->data2ptr; |
197 |
AV *av = newAV (); |
198 |
|
199 |
while (req->result) |
200 |
{ |
201 |
SV *sv = newSVpv (buf, 0); |
202 |
|
203 |
av_push (av, sv); |
204 |
buf += SvCUR (sv) + 1; |
205 |
req->result--; |
206 |
} |
207 |
|
208 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
209 |
} |
210 |
|
211 |
PUSHs (rv); |
212 |
} |
213 |
break; |
214 |
|
215 |
case REQ_OPEN: |
216 |
{ |
217 |
/* convert fd to fh */ |
218 |
SV *fh; |
219 |
|
220 |
PUSHs (sv_2mortal (newSViv (req->result))); |
221 |
PUTBACK; |
222 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
223 |
SPAGAIN; |
224 |
|
225 |
fh = SvREFCNT_inc (POPs); |
226 |
|
227 |
PUSHMARK (SP); |
228 |
XPUSHs (sv_2mortal (fh)); |
229 |
} |
230 |
break; |
231 |
|
232 |
case REQ_GROUP: |
233 |
req->fd = 2; /* mark group as finished */ |
234 |
|
235 |
if (req->data) |
236 |
{ |
237 |
int i; |
238 |
AV *av = (AV *)req->data; |
239 |
|
240 |
EXTEND (SP, AvFILL (av) + 1); |
241 |
for (i = 0; i <= AvFILL (av); ++i) |
242 |
PUSHs (*av_fetch (av, i, 0)); |
243 |
} |
244 |
break; |
245 |
|
246 |
case REQ_SLEEP: |
247 |
break; |
248 |
|
249 |
default: |
250 |
PUSHs (sv_2mortal (newSViv (req->result))); |
251 |
break; |
252 |
} |
253 |
|
254 |
|
255 |
PUTBACK; |
256 |
call_sv (req->callback, G_VOID | G_EVAL); |
257 |
SPAGAIN; |
258 |
|
259 |
if (SvTRUE (ERRSV)) |
260 |
{ |
261 |
req_free (req); |
262 |
croak (0); |
263 |
} |
264 |
|
265 |
FREETMPS; |
266 |
LEAVE; |
267 |
|
268 |
errno = errorno; |
269 |
} |
270 |
|
271 |
static void req_free (aio_req req) |
272 |
{ |
273 |
if (req->grp) |
274 |
{ |
275 |
aio_req grp = req->grp; |
276 |
|
277 |
/* unlink request */ |
278 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
279 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
280 |
|
281 |
if (grp->grp_first == req) |
282 |
grp->grp_first = req->grp_next; |
283 |
|
284 |
--grp->length; |
285 |
|
286 |
/* call feeder, if applicable */ |
287 |
aio_grp_feed (grp); |
288 |
|
289 |
/* finish, if done */ |
290 |
if (!grp->length && grp->fd) |
291 |
{ |
292 |
req_invoke (grp); |
293 |
req_free (grp); |
294 |
} |
295 |
} |
296 |
|
297 |
if (req->self) |
298 |
{ |
299 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
300 |
SvREFCNT_dec (req->self); |
301 |
} |
302 |
|
303 |
SvREFCNT_dec (req->data); |
304 |
SvREFCNT_dec (req->fh); |
305 |
SvREFCNT_dec (req->fh2); |
306 |
SvREFCNT_dec (req->callback); |
307 |
Safefree (req->statdata); |
308 |
|
309 |
if (req->type == REQ_READDIR && req->result >= 0) |
310 |
free (req->data2ptr); |
311 |
|
312 |
Safefree (req); |
313 |
} |
314 |
|
315 |
static void req_cancel (aio_req req) |
316 |
{ |
317 |
req->cancelled = 1; |
318 |
|
319 |
if (req->type == REQ_GROUP) |
320 |
{ |
321 |
aio_req sub; |
322 |
|
323 |
for (sub = req->grp_first; sub; sub = sub->grp_next) |
324 |
req_cancel (sub); |
325 |
} |
326 |
} |
327 |
|
328 |
static int poll_cb () |
329 |
{ |
330 |
dSP; |
331 |
int count = 0; |
332 |
int do_croak = 0; |
333 |
aio_req req; |
334 |
|
335 |
for (;;) |
336 |
{ |
337 |
pthread_mutex_lock (&reslock); |
338 |
req = ress; |
339 |
|
340 |
if (req) |
341 |
{ |
342 |
ress = req->next; |
343 |
|
344 |
if (!ress) |
345 |
{ |
346 |
/* read any signals sent by the worker threads */ |
347 |
char buf [32]; |
348 |
while (read (respipe [0], buf, 32) == 32) |
349 |
; |
350 |
|
351 |
rese = 0; |
352 |
} |
353 |
} |
354 |
|
355 |
pthread_mutex_unlock (&reslock); |
356 |
|
357 |
if (!req) |
358 |
break; |
359 |
|
360 |
nreqs--; |
361 |
|
362 |
if (req->type == REQ_QUIT) |
363 |
started--; |
364 |
else if (req->type == REQ_GROUP && req->length) |
365 |
{ |
366 |
req->fd = 1; /* mark request as delayed */ |
367 |
continue; |
368 |
} |
369 |
else |
370 |
{ |
371 |
if (req->type == REQ_READ) |
372 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
373 |
|
374 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
375 |
SvREADONLY_off (req->data); |
376 |
|
377 |
if (req->statdata) |
378 |
{ |
379 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
380 |
PL_laststatval = req->result; |
381 |
PL_statcache = *(req->statdata); |
382 |
} |
383 |
|
384 |
req_invoke (req); |
385 |
|
386 |
count++; |
387 |
} |
388 |
|
389 |
req_free (req); |
390 |
} |
391 |
|
392 |
return count; |
393 |
} |
394 |
|
395 |
static void *aio_proc(void *arg); |
396 |
|
397 |
static void start_thread (void) |
398 |
{ |
399 |
sigset_t fullsigset, oldsigset; |
400 |
pthread_t tid; |
401 |
pthread_attr_t attr; |
402 |
|
403 |
pthread_attr_init (&attr); |
404 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
405 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
406 |
|
407 |
sigfillset (&fullsigset); |
408 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
409 |
|
410 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
411 |
started++; |
412 |
|
413 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
414 |
} |
415 |
|
416 |
static void req_send (aio_req req) |
417 |
{ |
418 |
while (started < wanted && nreqs >= started) |
419 |
start_thread (); |
420 |
|
421 |
nreqs++; |
422 |
|
423 |
pthread_mutex_lock (&reqlock); |
424 |
|
425 |
req->next = 0; |
426 |
|
427 |
if (reqe) |
428 |
{ |
429 |
reqe->next = req; |
430 |
reqe = req; |
431 |
} |
432 |
else |
433 |
reqe = reqs = req; |
434 |
|
435 |
pthread_cond_signal (&reqwait); |
436 |
pthread_mutex_unlock (&reqlock); |
437 |
|
438 |
if (nreqs > max_outstanding) |
439 |
for (;;) |
440 |
{ |
441 |
poll_cb (); |
442 |
|
443 |
if (nreqs <= max_outstanding) |
444 |
break; |
445 |
|
446 |
poll_wait (); |
447 |
} |
448 |
} |
449 |
|
450 |
static void end_thread (void) |
451 |
{ |
452 |
aio_req req; |
453 |
Newz (0, req, 1, aio_cb); |
454 |
req->type = REQ_QUIT; |
455 |
|
456 |
req_send (req); |
457 |
} |
458 |
|
459 |
static void min_parallel (int nthreads) |
460 |
{ |
461 |
if (wanted < nthreads) |
462 |
wanted = nthreads; |
463 |
} |
464 |
|
465 |
static void max_parallel (int nthreads) |
466 |
{ |
467 |
int cur = started; |
468 |
|
469 |
if (wanted > nthreads) |
470 |
wanted = nthreads; |
471 |
|
472 |
while (cur > wanted) |
473 |
{ |
474 |
end_thread (); |
475 |
cur--; |
476 |
} |
477 |
|
478 |
while (started > wanted) |
479 |
{ |
480 |
poll_wait (); |
481 |
poll_cb (); |
482 |
} |
483 |
} |
484 |
|
485 |
static void create_pipe () |
486 |
{ |
487 |
if (pipe (respipe)) |
488 |
croak ("unable to initialize result pipe"); |
489 |
|
490 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
491 |
croak ("cannot set result pipe to nonblocking mode"); |
492 |
|
493 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
494 |
croak ("cannot set result pipe to nonblocking mode"); |
495 |
} |
496 |
|
497 |
/*****************************************************************************/ |
498 |
/* work around various missing functions */ |
499 |
|
500 |
#if !HAVE_PREADWRITE |
501 |
# define pread aio_pread |
502 |
# define pwrite aio_pwrite |
503 |
|
504 |
/* |
505 |
* make our pread/pwrite safe against themselves, but not against |
506 |
* normal read/write by using a mutex. slows down execution a lot, |
507 |
* but that's your problem, not mine. |
508 |
*/ |
509 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
510 |
|
511 |
static ssize_t pread (int fd, void *buf, size_t count, off_t offset) |
512 |
{ |
513 |
ssize_t res; |
514 |
off_t ooffset; |
515 |
|
516 |
pthread_mutex_lock (&preadwritelock); |
517 |
ooffset = lseek (fd, 0, SEEK_CUR); |
518 |
lseek (fd, offset, SEEK_SET); |
519 |
res = read (fd, buf, count); |
520 |
lseek (fd, ooffset, SEEK_SET); |
521 |
pthread_mutex_unlock (&preadwritelock); |
522 |
|
523 |
return res; |
524 |
} |
525 |
|
526 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
527 |
{ |
528 |
ssize_t res; |
529 |
off_t ooffset; |
530 |
|
531 |
pthread_mutex_lock (&preadwritelock); |
532 |
ooffset = lseek (fd, 0, SEEK_CUR); |
533 |
lseek (fd, offset, SEEK_SET); |
534 |
res = write (fd, buf, count); |
535 |
lseek (fd, offset, SEEK_SET); |
536 |
pthread_mutex_unlock (&preadwritelock); |
537 |
|
538 |
return res; |
539 |
} |
540 |
#endif |
541 |
|
542 |
#if !HAVE_FDATASYNC |
543 |
# define fdatasync fsync |
544 |
#endif |
545 |
|
546 |
#if !HAVE_READAHEAD |
547 |
# define readahead aio_readahead |
548 |
|
549 |
static ssize_t readahead (int fd, off_t offset, size_t count) |
550 |
{ |
551 |
char readahead_buf[4096]; |
552 |
|
553 |
while (count > 0) |
554 |
{ |
555 |
size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); |
556 |
|
557 |
pread (fd, readahead_buf, len, offset); |
558 |
offset += len; |
559 |
count -= len; |
560 |
} |
561 |
|
562 |
errno = 0; |
563 |
} |
564 |
#endif |
565 |
|
566 |
#if !HAVE_READDIR_R |
567 |
# define readdir_r aio_readdir_r |
568 |
|
569 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
570 |
|
571 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
572 |
{ |
573 |
struct dirent *e; |
574 |
int errorno; |
575 |
|
576 |
pthread_mutex_lock (&readdirlock); |
577 |
|
578 |
e = readdir (dirp); |
579 |
errorno = errno; |
580 |
|
581 |
if (e) |
582 |
{ |
583 |
*res = ent; |
584 |
strcpy (ent->d_name, e->d_name); |
585 |
} |
586 |
else |
587 |
*res = 0; |
588 |
|
589 |
pthread_mutex_unlock (&readdirlock); |
590 |
|
591 |
errno = errorno; |
592 |
return e ? 0 : -1; |
593 |
} |
594 |
#endif |
595 |
|
596 |
/* sendfile always needs emulation */ |
597 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count) |
598 |
{ |
599 |
ssize_t res; |
600 |
|
601 |
if (!count) |
602 |
return 0; |
603 |
|
604 |
#if HAVE_SENDFILE |
605 |
# if __linux |
606 |
res = sendfile (ofd, ifd, &offset, count); |
607 |
|
608 |
# elif __freebsd |
609 |
/* |
610 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
611 |
* wasted on making it similar to other I/O functions. |
612 |
*/ |
613 |
{ |
614 |
off_t sbytes; |
615 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
616 |
|
617 |
if (res < 0 && sbytes) |
618 |
/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */ |
619 |
res = sbytes; |
620 |
} |
621 |
|
622 |
# elif __hpux |
623 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
624 |
|
625 |
# elif __solaris |
626 |
{ |
627 |
struct sendfilevec vec; |
628 |
size_t sbytes; |
629 |
|
630 |
vec.sfv_fd = ifd; |
631 |
vec.sfv_flag = 0; |
632 |
vec.sfv_off = offset; |
633 |
vec.sfv_len = count; |
634 |
|
635 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
636 |
|
637 |
if (res < 0 && sbytes) |
638 |
res = sbytes; |
639 |
} |
640 |
|
641 |
# endif |
642 |
#else |
643 |
res = -1; |
644 |
errno = ENOSYS; |
645 |
#endif |
646 |
|
647 |
if (res < 0 |
648 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
649 |
#if __solaris |
650 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
651 |
#endif |
652 |
) |
653 |
) |
654 |
{ |
655 |
/* emulate sendfile. this is a major pain in the ass */ |
656 |
char buf[4096]; |
657 |
res = 0; |
658 |
|
659 |
while (count) |
660 |
{ |
661 |
ssize_t cnt; |
662 |
|
663 |
cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset); |
664 |
|
665 |
if (cnt <= 0) |
666 |
{ |
667 |
if (cnt && !res) res = -1; |
668 |
break; |
669 |
} |
670 |
|
671 |
cnt = write (ofd, buf, cnt); |
672 |
|
673 |
if (cnt <= 0) |
674 |
{ |
675 |
if (cnt && !res) res = -1; |
676 |
break; |
677 |
} |
678 |
|
679 |
offset += cnt; |
680 |
res += cnt; |
681 |
count -= cnt; |
682 |
} |
683 |
} |
684 |
|
685 |
return res; |
686 |
} |
687 |
|
688 |
/* read a full directory */ |
689 |
static int scandir_ (const char *path, void **namesp) |
690 |
{ |
691 |
DIR *dirp = opendir (path); |
692 |
union |
693 |
{ |
694 |
struct dirent d; |
695 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
696 |
} u; |
697 |
struct dirent *entp; |
698 |
char *name, *names; |
699 |
int memlen = 4096; |
700 |
int memofs = 0; |
701 |
int res = 0; |
702 |
int errorno; |
703 |
|
704 |
if (!dirp) |
705 |
return -1; |
706 |
|
707 |
names = malloc (memlen); |
708 |
|
709 |
for (;;) |
710 |
{ |
711 |
errno = 0, readdir_r (dirp, &u.d, &entp); |
712 |
|
713 |
if (!entp) |
714 |
break; |
715 |
|
716 |
name = entp->d_name; |
717 |
|
718 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
719 |
{ |
720 |
int len = strlen (name) + 1; |
721 |
|
722 |
res++; |
723 |
|
724 |
while (memofs + len > memlen) |
725 |
{ |
726 |
memlen *= 2; |
727 |
names = realloc (names, memlen); |
728 |
if (!names) |
729 |
break; |
730 |
} |
731 |
|
732 |
memcpy (names + memofs, name, len); |
733 |
memofs += len; |
734 |
} |
735 |
} |
736 |
|
737 |
errorno = errno; |
738 |
closedir (dirp); |
739 |
|
740 |
if (errorno) |
741 |
{ |
742 |
free (names); |
743 |
errno = errorno; |
744 |
res = -1; |
745 |
} |
746 |
|
747 |
*namesp = (void *)names; |
748 |
return res; |
749 |
} |
750 |
|
751 |
/*****************************************************************************/ |
752 |
|
753 |
static void *aio_proc (void *thr_arg) |
754 |
{ |
755 |
aio_req req; |
756 |
int type; |
757 |
|
758 |
do |
759 |
{ |
760 |
pthread_mutex_lock (&reqlock); |
761 |
|
762 |
for (;;) |
763 |
{ |
764 |
req = reqs; |
765 |
|
766 |
if (reqs) |
767 |
{ |
768 |
reqs = reqs->next; |
769 |
if (!reqs) reqe = 0; |
770 |
} |
771 |
|
772 |
if (req) |
773 |
break; |
774 |
|
775 |
pthread_cond_wait (&reqwait, &reqlock); |
776 |
} |
777 |
|
778 |
pthread_mutex_unlock (&reqlock); |
779 |
|
780 |
errno = 0; /* strictly unnecessary */ |
781 |
|
782 |
if (!req->cancelled) |
783 |
switch (req->type) |
784 |
{ |
785 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
786 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
787 |
|
788 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
789 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break; |
790 |
|
791 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
792 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
793 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
794 |
|
795 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
796 |
case REQ_CLOSE: req->result = close (req->fd); break; |
797 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
798 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
799 |
case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; |
800 |
case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; |
801 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
802 |
|
803 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
804 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
805 |
case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break; |
806 |
|
807 |
case REQ_SLEEP: |
808 |
{ |
809 |
struct timeval tv; |
810 |
|
811 |
tv.tv_sec = req->fd; |
812 |
tv.tv_usec = req->fd2; |
813 |
|
814 |
req->result = select (0, 0, 0, 0, &tv); |
815 |
} |
816 |
|
817 |
case REQ_QUIT: |
818 |
break; |
819 |
|
820 |
default: |
821 |
req->result = ENOSYS; |
822 |
break; |
823 |
} |
824 |
|
825 |
req->errorno = errno; |
826 |
|
827 |
pthread_mutex_lock (&reslock); |
828 |
|
829 |
req->next = 0; |
830 |
|
831 |
if (rese) |
832 |
{ |
833 |
rese->next = req; |
834 |
rese = req; |
835 |
} |
836 |
else |
837 |
{ |
838 |
rese = ress = req; |
839 |
|
840 |
/* write a dummy byte to the pipe so fh becomes ready */ |
841 |
write (respipe [1], &respipe, 1); |
842 |
} |
843 |
|
844 |
pthread_mutex_unlock (&reslock); |
845 |
} |
846 |
while (type != REQ_QUIT); |
847 |
|
848 |
return 0; |
849 |
} |
850 |
|
851 |
/*****************************************************************************/ |
852 |
|
853 |
static void atfork_prepare (void) |
854 |
{ |
855 |
pthread_mutex_lock (&reqlock); |
856 |
pthread_mutex_lock (&reslock); |
857 |
#if !HAVE_PREADWRITE |
858 |
pthread_mutex_lock (&preadwritelock); |
859 |
#endif |
860 |
#if !HAVE_READDIR_R |
861 |
pthread_mutex_lock (&readdirlock); |
862 |
#endif |
863 |
} |
864 |
|
865 |
static void atfork_parent (void) |
866 |
{ |
867 |
#if !HAVE_READDIR_R |
868 |
pthread_mutex_unlock (&readdirlock); |
869 |
#endif |
870 |
#if !HAVE_PREADWRITE |
871 |
pthread_mutex_unlock (&preadwritelock); |
872 |
#endif |
873 |
pthread_mutex_unlock (&reslock); |
874 |
pthread_mutex_unlock (&reqlock); |
875 |
} |
876 |
|
877 |
static void atfork_child (void) |
878 |
{ |
879 |
aio_req prv; |
880 |
|
881 |
started = 0; |
882 |
|
883 |
while (reqs) |
884 |
{ |
885 |
prv = reqs; |
886 |
reqs = prv->next; |
887 |
req_free (prv); |
888 |
} |
889 |
|
890 |
reqs = reqe = 0; |
891 |
|
892 |
while (ress) |
893 |
{ |
894 |
prv = ress; |
895 |
ress = prv->next; |
896 |
req_free (prv); |
897 |
} |
898 |
|
899 |
ress = rese = 0; |
900 |
|
901 |
close (respipe [0]); |
902 |
close (respipe [1]); |
903 |
create_pipe (); |
904 |
|
905 |
atfork_parent (); |
906 |
} |
907 |
|
908 |
#define dREQ \ |
909 |
aio_req req; \ |
910 |
\ |
911 |
if (SvOK (callback) && !SvROK (callback)) \ |
912 |
croak ("callback must be undef or of reference type"); \ |
913 |
\ |
914 |
Newz (0, req, 1, aio_cb); \ |
915 |
if (!req) \ |
916 |
croak ("out of memory during aio_req allocation"); \ |
917 |
\ |
918 |
req->callback = newSVsv (callback) |
919 |
|
920 |
#define REQ_SEND \ |
921 |
req_send (req); \ |
922 |
\ |
923 |
if (GIMME_V != G_VOID) \ |
924 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
925 |
|
926 |
MODULE = IO::AIO PACKAGE = IO::AIO |
927 |
|
928 |
PROTOTYPES: ENABLE |
929 |
|
930 |
BOOT: |
931 |
{ |
932 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
933 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
934 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
935 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
936 |
|
937 |
create_pipe (); |
938 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
939 |
} |
940 |
|
941 |
void |
942 |
min_parallel (nthreads) |
943 |
int nthreads |
944 |
PROTOTYPE: $ |
945 |
|
946 |
void |
947 |
max_parallel (nthreads) |
948 |
int nthreads |
949 |
PROTOTYPE: $ |
950 |
|
951 |
int |
952 |
max_outstanding (nreqs) |
953 |
int nreqs |
954 |
PROTOTYPE: $ |
955 |
CODE: |
956 |
RETVAL = max_outstanding; |
957 |
max_outstanding = nreqs; |
958 |
|
959 |
void |
960 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
961 |
SV * pathname |
962 |
int flags |
963 |
int mode |
964 |
SV * callback |
965 |
PROTOTYPE: $$$;$ |
966 |
PPCODE: |
967 |
{ |
968 |
dREQ; |
969 |
|
970 |
req->type = REQ_OPEN; |
971 |
req->data = newSVsv (pathname); |
972 |
req->dataptr = SvPVbyte_nolen (req->data); |
973 |
req->fd = flags; |
974 |
req->mode = mode; |
975 |
|
976 |
REQ_SEND; |
977 |
} |
978 |
|
979 |
void |
980 |
aio_close (fh,callback=&PL_sv_undef) |
981 |
SV * fh |
982 |
SV * callback |
983 |
PROTOTYPE: $;$ |
984 |
ALIAS: |
985 |
aio_close = REQ_CLOSE |
986 |
aio_fsync = REQ_FSYNC |
987 |
aio_fdatasync = REQ_FDATASYNC |
988 |
PPCODE: |
989 |
{ |
990 |
dREQ; |
991 |
|
992 |
req->type = ix; |
993 |
req->fh = newSVsv (fh); |
994 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
995 |
|
996 |
REQ_SEND (req); |
997 |
} |
998 |
|
999 |
void |
1000 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
1001 |
SV * fh |
1002 |
UV offset |
1003 |
UV length |
1004 |
SV * data |
1005 |
UV dataoffset |
1006 |
SV * callback |
1007 |
ALIAS: |
1008 |
aio_read = REQ_READ |
1009 |
aio_write = REQ_WRITE |
1010 |
PROTOTYPE: $$$$$;$ |
1011 |
PPCODE: |
1012 |
{ |
1013 |
aio_req req; |
1014 |
STRLEN svlen; |
1015 |
char *svptr = SvPVbyte (data, svlen); |
1016 |
|
1017 |
SvUPGRADE (data, SVt_PV); |
1018 |
SvPOK_on (data); |
1019 |
|
1020 |
if (dataoffset < 0) |
1021 |
dataoffset += svlen; |
1022 |
|
1023 |
if (dataoffset < 0 || dataoffset > svlen) |
1024 |
croak ("data offset outside of string"); |
1025 |
|
1026 |
if (ix == REQ_WRITE) |
1027 |
{ |
1028 |
/* write: check length and adjust. */ |
1029 |
if (length < 0 || length + dataoffset > svlen) |
1030 |
length = svlen - dataoffset; |
1031 |
} |
1032 |
else |
1033 |
{ |
1034 |
/* read: grow scalar as necessary */ |
1035 |
svptr = SvGROW (data, length + dataoffset); |
1036 |
} |
1037 |
|
1038 |
if (length < 0) |
1039 |
croak ("length must not be negative"); |
1040 |
|
1041 |
{ |
1042 |
dREQ; |
1043 |
|
1044 |
req->type = ix; |
1045 |
req->fh = newSVsv (fh); |
1046 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
1047 |
: IoOFP (sv_2io (fh))); |
1048 |
req->offset = offset; |
1049 |
req->length = length; |
1050 |
req->data = SvREFCNT_inc (data); |
1051 |
req->dataptr = (char *)svptr + dataoffset; |
1052 |
|
1053 |
if (!SvREADONLY (data)) |
1054 |
{ |
1055 |
SvREADONLY_on (data); |
1056 |
req->data2ptr = (void *)data; |
1057 |
} |
1058 |
|
1059 |
REQ_SEND; |
1060 |
} |
1061 |
} |
1062 |
|
1063 |
void |
1064 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
1065 |
SV * out_fh |
1066 |
SV * in_fh |
1067 |
UV in_offset |
1068 |
UV length |
1069 |
SV * callback |
1070 |
PROTOTYPE: $$$$;$ |
1071 |
PPCODE: |
1072 |
{ |
1073 |
dREQ; |
1074 |
|
1075 |
req->type = REQ_SENDFILE; |
1076 |
req->fh = newSVsv (out_fh); |
1077 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
1078 |
req->fh2 = newSVsv (in_fh); |
1079 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
1080 |
req->offset = in_offset; |
1081 |
req->length = length; |
1082 |
|
1083 |
REQ_SEND; |
1084 |
} |
1085 |
|
1086 |
void |
1087 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
1088 |
SV * fh |
1089 |
UV offset |
1090 |
IV length |
1091 |
SV * callback |
1092 |
PROTOTYPE: $$$;$ |
1093 |
PPCODE: |
1094 |
{ |
1095 |
dREQ; |
1096 |
|
1097 |
req->type = REQ_READAHEAD; |
1098 |
req->fh = newSVsv (fh); |
1099 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1100 |
req->offset = offset; |
1101 |
req->length = length; |
1102 |
|
1103 |
REQ_SEND; |
1104 |
} |
1105 |
|
1106 |
void |
1107 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
1108 |
SV * fh_or_path |
1109 |
SV * callback |
1110 |
ALIAS: |
1111 |
aio_stat = REQ_STAT |
1112 |
aio_lstat = REQ_LSTAT |
1113 |
PPCODE: |
1114 |
{ |
1115 |
dREQ; |
1116 |
|
1117 |
New (0, req->statdata, 1, Stat_t); |
1118 |
if (!req->statdata) |
1119 |
{ |
1120 |
req_free (req); |
1121 |
croak ("out of memory during aio_req->statdata allocation"); |
1122 |
} |
1123 |
|
1124 |
if (SvPOK (fh_or_path)) |
1125 |
{ |
1126 |
req->type = ix; |
1127 |
req->data = newSVsv (fh_or_path); |
1128 |
req->dataptr = SvPVbyte_nolen (req->data); |
1129 |
} |
1130 |
else |
1131 |
{ |
1132 |
req->type = REQ_FSTAT; |
1133 |
req->fh = newSVsv (fh_or_path); |
1134 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1135 |
} |
1136 |
|
1137 |
REQ_SEND; |
1138 |
} |
1139 |
|
1140 |
void |
1141 |
aio_unlink (pathname,callback=&PL_sv_undef) |
1142 |
SV * pathname |
1143 |
SV * callback |
1144 |
ALIAS: |
1145 |
aio_unlink = REQ_UNLINK |
1146 |
aio_rmdir = REQ_RMDIR |
1147 |
aio_readdir = REQ_READDIR |
1148 |
PPCODE: |
1149 |
{ |
1150 |
dREQ; |
1151 |
|
1152 |
req->type = ix; |
1153 |
req->data = newSVsv (pathname); |
1154 |
req->dataptr = SvPVbyte_nolen (req->data); |
1155 |
|
1156 |
REQ_SEND; |
1157 |
} |
1158 |
|
1159 |
void |
1160 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
1161 |
SV * oldpath |
1162 |
SV * newpath |
1163 |
SV * callback |
1164 |
ALIAS: |
1165 |
aio_link = REQ_LINK |
1166 |
aio_symlink = REQ_SYMLINK |
1167 |
aio_rename = REQ_RENAME |
1168 |
PPCODE: |
1169 |
{ |
1170 |
dREQ; |
1171 |
|
1172 |
req->type = ix; |
1173 |
req->fh = newSVsv (oldpath); |
1174 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
1175 |
req->data = newSVsv (newpath); |
1176 |
req->dataptr = SvPVbyte_nolen (req->data); |
1177 |
|
1178 |
REQ_SEND; |
1179 |
} |
1180 |
|
1181 |
void |
1182 |
aio_sleep (delay,callback=&PL_sv_undef) |
1183 |
double delay |
1184 |
SV * callback |
1185 |
PPCODE: |
1186 |
{ |
1187 |
dREQ; |
1188 |
|
1189 |
req->type = REQ_SLEEP; |
1190 |
req->fd = delay < 0. ? 0 : delay; |
1191 |
req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd); |
1192 |
|
1193 |
REQ_SEND; |
1194 |
} |
1195 |
|
1196 |
void |
1197 |
aio_group (callback=&PL_sv_undef) |
1198 |
SV * callback |
1199 |
PROTOTYPE: ;$ |
1200 |
PPCODE: |
1201 |
{ |
1202 |
dREQ; |
1203 |
req->type = REQ_GROUP; |
1204 |
req_send (req); |
1205 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
1206 |
} |
1207 |
|
1208 |
void |
1209 |
flush () |
1210 |
PROTOTYPE: |
1211 |
CODE: |
1212 |
while (nreqs) |
1213 |
{ |
1214 |
poll_wait (); |
1215 |
poll_cb (); |
1216 |
} |
1217 |
|
1218 |
void |
1219 |
poll() |
1220 |
PROTOTYPE: |
1221 |
CODE: |
1222 |
if (nreqs) |
1223 |
{ |
1224 |
poll_wait (); |
1225 |
poll_cb (); |
1226 |
} |
1227 |
|
1228 |
int |
1229 |
poll_fileno() |
1230 |
PROTOTYPE: |
1231 |
CODE: |
1232 |
RETVAL = respipe [0]; |
1233 |
OUTPUT: |
1234 |
RETVAL |
1235 |
|
1236 |
int |
1237 |
poll_cb(...) |
1238 |
PROTOTYPE: |
1239 |
CODE: |
1240 |
RETVAL = poll_cb (); |
1241 |
OUTPUT: |
1242 |
RETVAL |
1243 |
|
1244 |
void |
1245 |
poll_wait() |
1246 |
PROTOTYPE: |
1247 |
CODE: |
1248 |
if (nreqs) |
1249 |
poll_wait (); |
1250 |
|
1251 |
int |
1252 |
nreqs() |
1253 |
PROTOTYPE: |
1254 |
CODE: |
1255 |
RETVAL = nreqs; |
1256 |
OUTPUT: |
1257 |
RETVAL |
1258 |
|
1259 |
PROTOTYPES: DISABLE |
1260 |
|
1261 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
1262 |
|
1263 |
void |
1264 |
cancel (aio_req_ornot req) |
1265 |
PROTOTYPE: |
1266 |
CODE: |
1267 |
req_cancel (req); |
1268 |
|
1269 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
1270 |
|
1271 |
void |
1272 |
add (aio_req grp, ...) |
1273 |
PPCODE: |
1274 |
{ |
1275 |
int i; |
1276 |
|
1277 |
if (grp->fd == 2) |
1278 |
croak ("cannot add requests to IO::AIO::GRP after the group finished"); |
1279 |
|
1280 |
for (i = 1; i < items; ++i ) |
1281 |
{ |
1282 |
if (GIMME_V != G_VOID) |
1283 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
1284 |
|
1285 |
aio_req req = SvAIO_REQ (ST (i)); |
1286 |
|
1287 |
if (req) |
1288 |
{ |
1289 |
++grp->length; |
1290 |
req->grp = grp; |
1291 |
|
1292 |
req->grp_prev = 0; |
1293 |
req->grp_next = grp->grp_first; |
1294 |
|
1295 |
if (grp->grp_first) |
1296 |
grp->grp_first->grp_prev = req; |
1297 |
|
1298 |
grp->grp_first = req; |
1299 |
} |
1300 |
} |
1301 |
} |
1302 |
|
1303 |
void |
1304 |
result (aio_req grp, ...) |
1305 |
CODE: |
1306 |
{ |
1307 |
int i; |
1308 |
AV *av = newAV (); |
1309 |
|
1310 |
for (i = 1; i < items; ++i ) |
1311 |
av_push (av, newSVsv (ST (i))); |
1312 |
|
1313 |
SvREFCNT_dec (grp->data); |
1314 |
grp->data = (SV *)av; |
1315 |
} |
1316 |
|
1317 |
void |
1318 |
feeder_limit (aio_req grp, int limit) |
1319 |
CODE: |
1320 |
grp->fd2 = limit; |
1321 |
aio_grp_feed (grp); |
1322 |
|
1323 |
void |
1324 |
set_feeder (aio_req grp, SV *callback=&PL_sv_undef) |
1325 |
CODE: |
1326 |
{ |
1327 |
SvREFCNT_dec (grp->fh2); |
1328 |
grp->fh2 = newSVsv (callback); |
1329 |
|
1330 |
if (grp->fd2 <= 0) |
1331 |
grp->fd2 = 2; |
1332 |
|
1333 |
aio_grp_feed (grp); |
1334 |
} |
1335 |
|