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_GROUP, REQ_NOP, |
61 |
REQ_SLEEP, |
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 |
SV *data, *callback; |
72 |
SV *fh, *fh2; |
73 |
void *dataptr, *data2ptr; |
74 |
Stat_t *statdata; |
75 |
off_t offset; |
76 |
size_t length; |
77 |
ssize_t result; |
78 |
|
79 |
STRLEN dataoffset; |
80 |
int type; |
81 |
int fd, fd2; |
82 |
int errorno; |
83 |
mode_t mode; /* open */ |
84 |
|
85 |
unsigned char flags; |
86 |
unsigned char pri; |
87 |
|
88 |
SV *self; /* the perl counterpart of this request, if any */ |
89 |
struct aio_cb *grp, *grp_prev, *grp_next, *grp_first; |
90 |
} aio_cb; |
91 |
|
92 |
enum { |
93 |
FLAG_CANCELLED = 0x01, |
94 |
}; |
95 |
|
96 |
typedef aio_cb *aio_req; |
97 |
typedef aio_cb *aio_req_ornot; |
98 |
|
99 |
enum { |
100 |
PRI_MIN = 4, |
101 |
PRI_MAX = -4, |
102 |
|
103 |
DEFAULT_PRI = 0, |
104 |
PRI_BIAS = PRI_MIN, |
105 |
}; |
106 |
|
107 |
static int next_pri = DEFAULT_PRI + PRI_BIAS; |
108 |
|
109 |
static int started, wanted; |
110 |
static volatile int nreqs; |
111 |
static int max_outstanding = 1<<30; |
112 |
static int respipe [2]; |
113 |
|
114 |
static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; |
115 |
static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; |
116 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
117 |
|
118 |
static volatile aio_req reqs, reqe; /* queue start, queue end */ |
119 |
static volatile aio_req ress, rese; /* queue start, queue end */ |
120 |
|
121 |
static void req_invoke (aio_req req); |
122 |
static void req_free (aio_req req); |
123 |
|
124 |
/* must be called at most once */ |
125 |
static SV *req_sv (aio_req req, const char *klass) |
126 |
{ |
127 |
if (!req->self) |
128 |
{ |
129 |
req->self = (SV *)newHV (); |
130 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
131 |
} |
132 |
|
133 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
134 |
} |
135 |
|
136 |
static aio_req SvAIO_REQ (SV *sv) |
137 |
{ |
138 |
MAGIC *mg; |
139 |
|
140 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
141 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
142 |
|
143 |
mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
144 |
|
145 |
return mg ? (aio_req)mg->mg_ptr : 0; |
146 |
} |
147 |
|
148 |
static void aio_grp_feed (aio_req grp) |
149 |
{ |
150 |
while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED)) |
151 |
{ |
152 |
int old_len = grp->length; |
153 |
|
154 |
if (grp->fh2 && SvOK (grp->fh2)) |
155 |
{ |
156 |
dSP; |
157 |
|
158 |
ENTER; |
159 |
SAVETMPS; |
160 |
PUSHMARK (SP); |
161 |
XPUSHs (req_sv (grp, AIO_GRP_KLASS)); |
162 |
PUTBACK; |
163 |
call_sv (grp->fh2, G_VOID | G_EVAL); |
164 |
SPAGAIN; |
165 |
FREETMPS; |
166 |
LEAVE; |
167 |
} |
168 |
|
169 |
/* stop if no progress has been made */ |
170 |
if (old_len == grp->length) |
171 |
{ |
172 |
SvREFCNT_dec (grp->fh2); |
173 |
grp->fh2 = 0; |
174 |
break; |
175 |
} |
176 |
} |
177 |
} |
178 |
|
179 |
static void aio_grp_dec (aio_req grp) |
180 |
{ |
181 |
--grp->length; |
182 |
|
183 |
/* call feeder, if applicable */ |
184 |
aio_grp_feed (grp); |
185 |
|
186 |
/* finish, if done */ |
187 |
if (!grp->length && grp->fd) |
188 |
{ |
189 |
req_invoke (grp); |
190 |
req_free (grp); |
191 |
} |
192 |
} |
193 |
|
194 |
static void poll_wait () |
195 |
{ |
196 |
while (nreqs) |
197 |
{ |
198 |
aio_req req; |
199 |
pthread_mutex_lock (&reslock); |
200 |
req = ress; |
201 |
pthread_mutex_unlock (&reslock); |
202 |
|
203 |
if (req) |
204 |
return; |
205 |
|
206 |
fd_set rfd; |
207 |
FD_ZERO(&rfd); |
208 |
FD_SET(respipe [0], &rfd); |
209 |
|
210 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
211 |
} |
212 |
} |
213 |
|
214 |
static void req_invoke (aio_req req) |
215 |
{ |
216 |
dSP; |
217 |
int errorno = errno; |
218 |
|
219 |
if (req->flags & FLAG_CANCELLED || !SvOK (req->callback)) |
220 |
return; |
221 |
|
222 |
errno = req->errorno; |
223 |
|
224 |
ENTER; |
225 |
SAVETMPS; |
226 |
PUSHMARK (SP); |
227 |
EXTEND (SP, 1); |
228 |
|
229 |
switch (req->type) |
230 |
{ |
231 |
case REQ_READDIR: |
232 |
{ |
233 |
SV *rv = &PL_sv_undef; |
234 |
|
235 |
if (req->result >= 0) |
236 |
{ |
237 |
char *buf = req->data2ptr; |
238 |
AV *av = newAV (); |
239 |
|
240 |
while (req->result) |
241 |
{ |
242 |
SV *sv = newSVpv (buf, 0); |
243 |
|
244 |
av_push (av, sv); |
245 |
buf += SvCUR (sv) + 1; |
246 |
req->result--; |
247 |
} |
248 |
|
249 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
250 |
} |
251 |
|
252 |
PUSHs (rv); |
253 |
} |
254 |
break; |
255 |
|
256 |
case REQ_OPEN: |
257 |
{ |
258 |
/* convert fd to fh */ |
259 |
SV *fh; |
260 |
|
261 |
PUSHs (sv_2mortal (newSViv (req->result))); |
262 |
PUTBACK; |
263 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
264 |
SPAGAIN; |
265 |
|
266 |
fh = SvREFCNT_inc (POPs); |
267 |
|
268 |
PUSHMARK (SP); |
269 |
XPUSHs (sv_2mortal (fh)); |
270 |
} |
271 |
break; |
272 |
|
273 |
case REQ_GROUP: |
274 |
req->fd = 2; /* mark group as finished */ |
275 |
|
276 |
if (req->data) |
277 |
{ |
278 |
int i; |
279 |
AV *av = (AV *)req->data; |
280 |
|
281 |
EXTEND (SP, AvFILL (av) + 1); |
282 |
for (i = 0; i <= AvFILL (av); ++i) |
283 |
PUSHs (*av_fetch (av, i, 0)); |
284 |
} |
285 |
break; |
286 |
|
287 |
case REQ_NOP: |
288 |
case REQ_SLEEP: |
289 |
break; |
290 |
|
291 |
default: |
292 |
PUSHs (sv_2mortal (newSViv (req->result))); |
293 |
break; |
294 |
} |
295 |
|
296 |
|
297 |
PUTBACK; |
298 |
call_sv (req->callback, G_VOID | G_EVAL); |
299 |
SPAGAIN; |
300 |
|
301 |
FREETMPS; |
302 |
LEAVE; |
303 |
|
304 |
errno = errorno; |
305 |
|
306 |
if (SvTRUE (ERRSV)) |
307 |
{ |
308 |
req_free (req); |
309 |
croak (0); |
310 |
} |
311 |
} |
312 |
|
313 |
static void req_free (aio_req req) |
314 |
{ |
315 |
if (req->grp) |
316 |
{ |
317 |
aio_req grp = req->grp; |
318 |
|
319 |
/* unlink request */ |
320 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
321 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
322 |
|
323 |
if (grp->grp_first == req) |
324 |
grp->grp_first = req->grp_next; |
325 |
|
326 |
aio_grp_dec (grp); |
327 |
} |
328 |
|
329 |
if (req->self) |
330 |
{ |
331 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
332 |
SvREFCNT_dec (req->self); |
333 |
} |
334 |
|
335 |
SvREFCNT_dec (req->data); |
336 |
SvREFCNT_dec (req->fh); |
337 |
SvREFCNT_dec (req->fh2); |
338 |
SvREFCNT_dec (req->callback); |
339 |
Safefree (req->statdata); |
340 |
|
341 |
if (req->type == REQ_READDIR && req->result >= 0) |
342 |
free (req->data2ptr); |
343 |
|
344 |
Safefree (req); |
345 |
} |
346 |
|
347 |
static void req_cancel (aio_req req) |
348 |
{ |
349 |
req->flags |= FLAG_CANCELLED; |
350 |
|
351 |
if (req->type == REQ_GROUP) |
352 |
{ |
353 |
aio_req sub; |
354 |
|
355 |
for (sub = req->grp_first; sub; sub = sub->grp_next) |
356 |
req_cancel (sub); |
357 |
} |
358 |
} |
359 |
|
360 |
static int poll_cb () |
361 |
{ |
362 |
dSP; |
363 |
int count = 0; |
364 |
int do_croak = 0; |
365 |
aio_req req; |
366 |
|
367 |
for (;;) |
368 |
{ |
369 |
pthread_mutex_lock (&reslock); |
370 |
req = ress; |
371 |
|
372 |
if (req) |
373 |
{ |
374 |
ress = req->next; |
375 |
|
376 |
if (!ress) |
377 |
{ |
378 |
/* read any signals sent by the worker threads */ |
379 |
char buf [32]; |
380 |
while (read (respipe [0], buf, 32) == 32) |
381 |
; |
382 |
|
383 |
rese = 0; |
384 |
} |
385 |
} |
386 |
|
387 |
pthread_mutex_unlock (&reslock); |
388 |
|
389 |
if (!req) |
390 |
break; |
391 |
|
392 |
--nreqs; |
393 |
|
394 |
if (req->type == REQ_QUIT) |
395 |
started--; |
396 |
else if (req->type == REQ_GROUP && req->length) |
397 |
{ |
398 |
req->fd = 1; /* mark request as delayed */ |
399 |
continue; |
400 |
} |
401 |
else |
402 |
{ |
403 |
if (req->type == REQ_READ) |
404 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
405 |
|
406 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
407 |
SvREADONLY_off (req->data); |
408 |
|
409 |
if (req->statdata) |
410 |
{ |
411 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
412 |
PL_laststatval = req->result; |
413 |
PL_statcache = *(req->statdata); |
414 |
} |
415 |
|
416 |
req_invoke (req); |
417 |
|
418 |
count++; |
419 |
} |
420 |
|
421 |
req_free (req); |
422 |
} |
423 |
|
424 |
return count; |
425 |
} |
426 |
|
427 |
static void *aio_proc(void *arg); |
428 |
|
429 |
static void start_thread (void) |
430 |
{ |
431 |
sigset_t fullsigset, oldsigset; |
432 |
pthread_t tid; |
433 |
pthread_attr_t attr; |
434 |
|
435 |
pthread_attr_init (&attr); |
436 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
437 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
438 |
|
439 |
sigfillset (&fullsigset); |
440 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
441 |
|
442 |
if (pthread_create (&tid, &attr, aio_proc, 0) == 0) |
443 |
started++; |
444 |
|
445 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
446 |
} |
447 |
|
448 |
static void req_send (aio_req req) |
449 |
{ |
450 |
while (started < wanted && nreqs >= started) |
451 |
start_thread (); |
452 |
|
453 |
++nreqs; |
454 |
|
455 |
pthread_mutex_lock (&reqlock); |
456 |
|
457 |
req->next = 0; |
458 |
|
459 |
if (reqe) |
460 |
{ |
461 |
reqe->next = req; |
462 |
reqe = req; |
463 |
} |
464 |
else |
465 |
reqe = reqs = req; |
466 |
|
467 |
pthread_cond_signal (&reqwait); |
468 |
pthread_mutex_unlock (&reqlock); |
469 |
|
470 |
if (nreqs > max_outstanding) |
471 |
for (;;) |
472 |
{ |
473 |
poll_cb (); |
474 |
|
475 |
if (nreqs <= max_outstanding) |
476 |
break; |
477 |
|
478 |
poll_wait (); |
479 |
} |
480 |
} |
481 |
|
482 |
static void end_thread (void) |
483 |
{ |
484 |
aio_req req; |
485 |
Newz (0, req, 1, aio_cb); |
486 |
req->type = REQ_QUIT; |
487 |
|
488 |
req_send (req); |
489 |
} |
490 |
|
491 |
static void min_parallel (int nthreads) |
492 |
{ |
493 |
if (wanted < nthreads) |
494 |
wanted = nthreads; |
495 |
} |
496 |
|
497 |
static void max_parallel (int nthreads) |
498 |
{ |
499 |
int cur = started; |
500 |
|
501 |
if (wanted > nthreads) |
502 |
wanted = nthreads; |
503 |
|
504 |
while (cur > wanted) |
505 |
{ |
506 |
end_thread (); |
507 |
cur--; |
508 |
} |
509 |
|
510 |
while (started > wanted) |
511 |
{ |
512 |
poll_wait (); |
513 |
poll_cb (); |
514 |
} |
515 |
} |
516 |
|
517 |
static void create_pipe () |
518 |
{ |
519 |
if (pipe (respipe)) |
520 |
croak ("unable to initialize result pipe"); |
521 |
|
522 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
523 |
croak ("cannot set result pipe to nonblocking mode"); |
524 |
|
525 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
526 |
croak ("cannot set result pipe to nonblocking mode"); |
527 |
} |
528 |
|
529 |
/*****************************************************************************/ |
530 |
/* work around various missing functions */ |
531 |
|
532 |
#if !HAVE_PREADWRITE |
533 |
# define pread aio_pread |
534 |
# define pwrite aio_pwrite |
535 |
|
536 |
/* |
537 |
* make our pread/pwrite safe against themselves, but not against |
538 |
* normal read/write by using a mutex. slows down execution a lot, |
539 |
* but that's your problem, not mine. |
540 |
*/ |
541 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
542 |
|
543 |
static ssize_t pread (int fd, void *buf, size_t count, off_t offset) |
544 |
{ |
545 |
ssize_t res; |
546 |
off_t ooffset; |
547 |
|
548 |
pthread_mutex_lock (&preadwritelock); |
549 |
ooffset = lseek (fd, 0, SEEK_CUR); |
550 |
lseek (fd, offset, SEEK_SET); |
551 |
res = read (fd, buf, count); |
552 |
lseek (fd, ooffset, SEEK_SET); |
553 |
pthread_mutex_unlock (&preadwritelock); |
554 |
|
555 |
return res; |
556 |
} |
557 |
|
558 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
559 |
{ |
560 |
ssize_t res; |
561 |
off_t ooffset; |
562 |
|
563 |
pthread_mutex_lock (&preadwritelock); |
564 |
ooffset = lseek (fd, 0, SEEK_CUR); |
565 |
lseek (fd, offset, SEEK_SET); |
566 |
res = write (fd, buf, count); |
567 |
lseek (fd, offset, SEEK_SET); |
568 |
pthread_mutex_unlock (&preadwritelock); |
569 |
|
570 |
return res; |
571 |
} |
572 |
#endif |
573 |
|
574 |
#if !HAVE_FDATASYNC |
575 |
# define fdatasync fsync |
576 |
#endif |
577 |
|
578 |
#if !HAVE_READAHEAD |
579 |
# define readahead aio_readahead |
580 |
|
581 |
static ssize_t readahead (int fd, off_t offset, size_t count) |
582 |
{ |
583 |
char readahead_buf[4096]; |
584 |
|
585 |
while (count > 0) |
586 |
{ |
587 |
size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); |
588 |
|
589 |
pread (fd, readahead_buf, len, offset); |
590 |
offset += len; |
591 |
count -= len; |
592 |
} |
593 |
|
594 |
errno = 0; |
595 |
} |
596 |
#endif |
597 |
|
598 |
#if !HAVE_READDIR_R |
599 |
# define readdir_r aio_readdir_r |
600 |
|
601 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
602 |
|
603 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
604 |
{ |
605 |
struct dirent *e; |
606 |
int errorno; |
607 |
|
608 |
pthread_mutex_lock (&readdirlock); |
609 |
|
610 |
e = readdir (dirp); |
611 |
errorno = errno; |
612 |
|
613 |
if (e) |
614 |
{ |
615 |
*res = ent; |
616 |
strcpy (ent->d_name, e->d_name); |
617 |
} |
618 |
else |
619 |
*res = 0; |
620 |
|
621 |
pthread_mutex_unlock (&readdirlock); |
622 |
|
623 |
errno = errorno; |
624 |
return e ? 0 : -1; |
625 |
} |
626 |
#endif |
627 |
|
628 |
/* sendfile always needs emulation */ |
629 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count) |
630 |
{ |
631 |
ssize_t res; |
632 |
|
633 |
if (!count) |
634 |
return 0; |
635 |
|
636 |
#if HAVE_SENDFILE |
637 |
# if __linux |
638 |
res = sendfile (ofd, ifd, &offset, count); |
639 |
|
640 |
# elif __freebsd |
641 |
/* |
642 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
643 |
* wasted on making it similar to other I/O functions. |
644 |
*/ |
645 |
{ |
646 |
off_t sbytes; |
647 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
648 |
|
649 |
if (res < 0 && sbytes) |
650 |
/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */ |
651 |
res = sbytes; |
652 |
} |
653 |
|
654 |
# elif __hpux |
655 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
656 |
|
657 |
# elif __solaris |
658 |
{ |
659 |
struct sendfilevec vec; |
660 |
size_t sbytes; |
661 |
|
662 |
vec.sfv_fd = ifd; |
663 |
vec.sfv_flag = 0; |
664 |
vec.sfv_off = offset; |
665 |
vec.sfv_len = count; |
666 |
|
667 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
668 |
|
669 |
if (res < 0 && sbytes) |
670 |
res = sbytes; |
671 |
} |
672 |
|
673 |
# endif |
674 |
#else |
675 |
res = -1; |
676 |
errno = ENOSYS; |
677 |
#endif |
678 |
|
679 |
if (res < 0 |
680 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
681 |
#if __solaris |
682 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
683 |
#endif |
684 |
) |
685 |
) |
686 |
{ |
687 |
/* emulate sendfile. this is a major pain in the ass */ |
688 |
char buf[4096]; |
689 |
res = 0; |
690 |
|
691 |
while (count) |
692 |
{ |
693 |
ssize_t cnt; |
694 |
|
695 |
cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset); |
696 |
|
697 |
if (cnt <= 0) |
698 |
{ |
699 |
if (cnt && !res) res = -1; |
700 |
break; |
701 |
} |
702 |
|
703 |
cnt = write (ofd, buf, cnt); |
704 |
|
705 |
if (cnt <= 0) |
706 |
{ |
707 |
if (cnt && !res) res = -1; |
708 |
break; |
709 |
} |
710 |
|
711 |
offset += cnt; |
712 |
res += cnt; |
713 |
count -= cnt; |
714 |
} |
715 |
} |
716 |
|
717 |
return res; |
718 |
} |
719 |
|
720 |
/* read a full directory */ |
721 |
static int scandir_ (const char *path, void **namesp) |
722 |
{ |
723 |
DIR *dirp = opendir (path); |
724 |
union |
725 |
{ |
726 |
struct dirent d; |
727 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
728 |
} u; |
729 |
struct dirent *entp; |
730 |
char *name, *names; |
731 |
int memlen = 4096; |
732 |
int memofs = 0; |
733 |
int res = 0; |
734 |
int errorno; |
735 |
|
736 |
if (!dirp) |
737 |
return -1; |
738 |
|
739 |
names = malloc (memlen); |
740 |
|
741 |
for (;;) |
742 |
{ |
743 |
errno = 0, readdir_r (dirp, &u.d, &entp); |
744 |
|
745 |
if (!entp) |
746 |
break; |
747 |
|
748 |
name = entp->d_name; |
749 |
|
750 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
751 |
{ |
752 |
int len = strlen (name) + 1; |
753 |
|
754 |
res++; |
755 |
|
756 |
while (memofs + len > memlen) |
757 |
{ |
758 |
memlen *= 2; |
759 |
names = realloc (names, memlen); |
760 |
if (!names) |
761 |
break; |
762 |
} |
763 |
|
764 |
memcpy (names + memofs, name, len); |
765 |
memofs += len; |
766 |
} |
767 |
} |
768 |
|
769 |
errorno = errno; |
770 |
closedir (dirp); |
771 |
|
772 |
if (errorno) |
773 |
{ |
774 |
free (names); |
775 |
errno = errorno; |
776 |
res = -1; |
777 |
} |
778 |
|
779 |
*namesp = (void *)names; |
780 |
return res; |
781 |
} |
782 |
|
783 |
/*****************************************************************************/ |
784 |
|
785 |
static void *aio_proc (void *thr_arg) |
786 |
{ |
787 |
aio_req req; |
788 |
int type; |
789 |
|
790 |
do |
791 |
{ |
792 |
pthread_mutex_lock (&reqlock); |
793 |
|
794 |
for (;;) |
795 |
{ |
796 |
req = reqs; |
797 |
|
798 |
if (reqs) |
799 |
{ |
800 |
reqs = reqs->next; |
801 |
if (!reqs) reqe = 0; |
802 |
} |
803 |
|
804 |
if (req) |
805 |
break; |
806 |
|
807 |
pthread_cond_wait (&reqwait, &reqlock); |
808 |
} |
809 |
|
810 |
pthread_mutex_unlock (&reqlock); |
811 |
|
812 |
errno = 0; /* strictly unnecessary */ |
813 |
type = req->type; /* remember type for QUIT check */ |
814 |
|
815 |
if (!(req->flags & FLAG_CANCELLED)) |
816 |
switch (type) |
817 |
{ |
818 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
819 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
820 |
|
821 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
822 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break; |
823 |
|
824 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
825 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
826 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
827 |
|
828 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
829 |
case REQ_CLOSE: req->result = close (req->fd); break; |
830 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
831 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
832 |
case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; |
833 |
case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; |
834 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
835 |
|
836 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
837 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
838 |
case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break; |
839 |
|
840 |
case REQ_SLEEP: |
841 |
{ |
842 |
struct timeval tv; |
843 |
|
844 |
tv.tv_sec = req->fd; |
845 |
tv.tv_usec = req->fd2; |
846 |
|
847 |
req->result = select (0, 0, 0, 0, &tv); |
848 |
} |
849 |
|
850 |
case REQ_GROUP: |
851 |
case REQ_NOP: |
852 |
case REQ_QUIT: |
853 |
break; |
854 |
|
855 |
default: |
856 |
req->result = ENOSYS; |
857 |
break; |
858 |
} |
859 |
|
860 |
req->errorno = errno; |
861 |
|
862 |
pthread_mutex_lock (&reslock); |
863 |
|
864 |
req->next = 0; |
865 |
|
866 |
if (rese) |
867 |
{ |
868 |
rese->next = req; |
869 |
rese = req; |
870 |
} |
871 |
else |
872 |
{ |
873 |
rese = ress = req; |
874 |
|
875 |
/* write a dummy byte to the pipe so fh becomes ready */ |
876 |
write (respipe [1], &respipe, 1); |
877 |
} |
878 |
|
879 |
pthread_mutex_unlock (&reslock); |
880 |
} |
881 |
while (type != REQ_QUIT); |
882 |
|
883 |
return 0; |
884 |
} |
885 |
|
886 |
/*****************************************************************************/ |
887 |
|
888 |
static void atfork_prepare (void) |
889 |
{ |
890 |
pthread_mutex_lock (&reqlock); |
891 |
pthread_mutex_lock (&reslock); |
892 |
#if !HAVE_PREADWRITE |
893 |
pthread_mutex_lock (&preadwritelock); |
894 |
#endif |
895 |
#if !HAVE_READDIR_R |
896 |
pthread_mutex_lock (&readdirlock); |
897 |
#endif |
898 |
} |
899 |
|
900 |
static void atfork_parent (void) |
901 |
{ |
902 |
#if !HAVE_READDIR_R |
903 |
pthread_mutex_unlock (&readdirlock); |
904 |
#endif |
905 |
#if !HAVE_PREADWRITE |
906 |
pthread_mutex_unlock (&preadwritelock); |
907 |
#endif |
908 |
pthread_mutex_unlock (&reslock); |
909 |
pthread_mutex_unlock (&reqlock); |
910 |
} |
911 |
|
912 |
static void atfork_child (void) |
913 |
{ |
914 |
aio_req prv; |
915 |
|
916 |
started = 0; |
917 |
|
918 |
while (reqs) |
919 |
{ |
920 |
prv = reqs; |
921 |
reqs = prv->next; |
922 |
req_free (prv); |
923 |
} |
924 |
|
925 |
reqs = reqe = 0; |
926 |
|
927 |
while (ress) |
928 |
{ |
929 |
prv = ress; |
930 |
ress = prv->next; |
931 |
req_free (prv); |
932 |
} |
933 |
|
934 |
ress = rese = 0; |
935 |
|
936 |
close (respipe [0]); |
937 |
close (respipe [1]); |
938 |
create_pipe (); |
939 |
|
940 |
atfork_parent (); |
941 |
} |
942 |
|
943 |
#define dREQ \ |
944 |
aio_req req; \ |
945 |
int req_pri = next_pri; \ |
946 |
next_pri = DEFAULT_PRI + PRI_BIAS; \ |
947 |
\ |
948 |
if (SvOK (callback) && !SvROK (callback)) \ |
949 |
croak ("callback must be undef or of reference type"); \ |
950 |
\ |
951 |
Newz (0, req, 1, aio_cb); \ |
952 |
if (!req) \ |
953 |
croak ("out of memory during aio_req allocation"); \ |
954 |
\ |
955 |
req->callback = newSVsv (callback); \ |
956 |
req->pri = req_pri |
957 |
|
958 |
#define REQ_SEND \ |
959 |
req_send (req); \ |
960 |
\ |
961 |
if (GIMME_V != G_VOID) \ |
962 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
963 |
|
964 |
MODULE = IO::AIO PACKAGE = IO::AIO |
965 |
|
966 |
PROTOTYPES: ENABLE |
967 |
|
968 |
BOOT: |
969 |
{ |
970 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
971 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
972 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
973 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
974 |
|
975 |
create_pipe (); |
976 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
977 |
} |
978 |
|
979 |
void |
980 |
min_parallel (nthreads) |
981 |
int nthreads |
982 |
PROTOTYPE: $ |
983 |
|
984 |
void |
985 |
max_parallel (nthreads) |
986 |
int nthreads |
987 |
PROTOTYPE: $ |
988 |
|
989 |
int |
990 |
max_outstanding (nreqs) |
991 |
int nreqs |
992 |
PROTOTYPE: $ |
993 |
CODE: |
994 |
RETVAL = max_outstanding; |
995 |
max_outstanding = nreqs; |
996 |
|
997 |
void |
998 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
999 |
SV * pathname |
1000 |
int flags |
1001 |
int mode |
1002 |
SV * callback |
1003 |
PROTOTYPE: $$$;$ |
1004 |
PPCODE: |
1005 |
{ |
1006 |
dREQ; |
1007 |
|
1008 |
req->type = REQ_OPEN; |
1009 |
req->data = newSVsv (pathname); |
1010 |
req->dataptr = SvPVbyte_nolen (req->data); |
1011 |
req->fd = flags; |
1012 |
req->mode = mode; |
1013 |
|
1014 |
REQ_SEND; |
1015 |
} |
1016 |
|
1017 |
void |
1018 |
aio_close (fh,callback=&PL_sv_undef) |
1019 |
SV * fh |
1020 |
SV * callback |
1021 |
PROTOTYPE: $;$ |
1022 |
ALIAS: |
1023 |
aio_close = REQ_CLOSE |
1024 |
aio_fsync = REQ_FSYNC |
1025 |
aio_fdatasync = REQ_FDATASYNC |
1026 |
PPCODE: |
1027 |
{ |
1028 |
dREQ; |
1029 |
|
1030 |
req->type = ix; |
1031 |
req->fh = newSVsv (fh); |
1032 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1033 |
|
1034 |
REQ_SEND (req); |
1035 |
} |
1036 |
|
1037 |
void |
1038 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
1039 |
SV * fh |
1040 |
UV offset |
1041 |
UV length |
1042 |
SV * data |
1043 |
UV dataoffset |
1044 |
SV * callback |
1045 |
ALIAS: |
1046 |
aio_read = REQ_READ |
1047 |
aio_write = REQ_WRITE |
1048 |
PROTOTYPE: $$$$$;$ |
1049 |
PPCODE: |
1050 |
{ |
1051 |
aio_req req; |
1052 |
STRLEN svlen; |
1053 |
char *svptr = SvPVbyte (data, svlen); |
1054 |
|
1055 |
SvUPGRADE (data, SVt_PV); |
1056 |
SvPOK_on (data); |
1057 |
|
1058 |
if (dataoffset < 0) |
1059 |
dataoffset += svlen; |
1060 |
|
1061 |
if (dataoffset < 0 || dataoffset > svlen) |
1062 |
croak ("data offset outside of string"); |
1063 |
|
1064 |
if (ix == REQ_WRITE) |
1065 |
{ |
1066 |
/* write: check length and adjust. */ |
1067 |
if (length < 0 || length + dataoffset > svlen) |
1068 |
length = svlen - dataoffset; |
1069 |
} |
1070 |
else |
1071 |
{ |
1072 |
/* read: grow scalar as necessary */ |
1073 |
svptr = SvGROW (data, length + dataoffset); |
1074 |
} |
1075 |
|
1076 |
if (length < 0) |
1077 |
croak ("length must not be negative"); |
1078 |
|
1079 |
{ |
1080 |
dREQ; |
1081 |
|
1082 |
req->type = ix; |
1083 |
req->fh = newSVsv (fh); |
1084 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
1085 |
: IoOFP (sv_2io (fh))); |
1086 |
req->offset = offset; |
1087 |
req->length = length; |
1088 |
req->data = SvREFCNT_inc (data); |
1089 |
req->dataptr = (char *)svptr + dataoffset; |
1090 |
|
1091 |
if (!SvREADONLY (data)) |
1092 |
{ |
1093 |
SvREADONLY_on (data); |
1094 |
req->data2ptr = (void *)data; |
1095 |
} |
1096 |
|
1097 |
REQ_SEND; |
1098 |
} |
1099 |
} |
1100 |
|
1101 |
void |
1102 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
1103 |
SV * out_fh |
1104 |
SV * in_fh |
1105 |
UV in_offset |
1106 |
UV length |
1107 |
SV * callback |
1108 |
PROTOTYPE: $$$$;$ |
1109 |
PPCODE: |
1110 |
{ |
1111 |
dREQ; |
1112 |
|
1113 |
req->type = REQ_SENDFILE; |
1114 |
req->fh = newSVsv (out_fh); |
1115 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
1116 |
req->fh2 = newSVsv (in_fh); |
1117 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
1118 |
req->offset = in_offset; |
1119 |
req->length = length; |
1120 |
|
1121 |
REQ_SEND; |
1122 |
} |
1123 |
|
1124 |
void |
1125 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
1126 |
SV * fh |
1127 |
UV offset |
1128 |
IV length |
1129 |
SV * callback |
1130 |
PROTOTYPE: $$$;$ |
1131 |
PPCODE: |
1132 |
{ |
1133 |
dREQ; |
1134 |
|
1135 |
req->type = REQ_READAHEAD; |
1136 |
req->fh = newSVsv (fh); |
1137 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1138 |
req->offset = offset; |
1139 |
req->length = length; |
1140 |
|
1141 |
REQ_SEND; |
1142 |
} |
1143 |
|
1144 |
void |
1145 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
1146 |
SV * fh_or_path |
1147 |
SV * callback |
1148 |
ALIAS: |
1149 |
aio_stat = REQ_STAT |
1150 |
aio_lstat = REQ_LSTAT |
1151 |
PPCODE: |
1152 |
{ |
1153 |
dREQ; |
1154 |
|
1155 |
New (0, req->statdata, 1, Stat_t); |
1156 |
if (!req->statdata) |
1157 |
{ |
1158 |
req_free (req); |
1159 |
croak ("out of memory during aio_req->statdata allocation"); |
1160 |
} |
1161 |
|
1162 |
if (SvPOK (fh_or_path)) |
1163 |
{ |
1164 |
req->type = ix; |
1165 |
req->data = newSVsv (fh_or_path); |
1166 |
req->dataptr = SvPVbyte_nolen (req->data); |
1167 |
} |
1168 |
else |
1169 |
{ |
1170 |
req->type = REQ_FSTAT; |
1171 |
req->fh = newSVsv (fh_or_path); |
1172 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1173 |
} |
1174 |
|
1175 |
REQ_SEND; |
1176 |
} |
1177 |
|
1178 |
void |
1179 |
aio_unlink (pathname,callback=&PL_sv_undef) |
1180 |
SV * pathname |
1181 |
SV * callback |
1182 |
ALIAS: |
1183 |
aio_unlink = REQ_UNLINK |
1184 |
aio_rmdir = REQ_RMDIR |
1185 |
aio_readdir = REQ_READDIR |
1186 |
PPCODE: |
1187 |
{ |
1188 |
dREQ; |
1189 |
|
1190 |
req->type = ix; |
1191 |
req->data = newSVsv (pathname); |
1192 |
req->dataptr = SvPVbyte_nolen (req->data); |
1193 |
|
1194 |
REQ_SEND; |
1195 |
} |
1196 |
|
1197 |
void |
1198 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
1199 |
SV * oldpath |
1200 |
SV * newpath |
1201 |
SV * callback |
1202 |
ALIAS: |
1203 |
aio_link = REQ_LINK |
1204 |
aio_symlink = REQ_SYMLINK |
1205 |
aio_rename = REQ_RENAME |
1206 |
PPCODE: |
1207 |
{ |
1208 |
dREQ; |
1209 |
|
1210 |
req->type = ix; |
1211 |
req->fh = newSVsv (oldpath); |
1212 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
1213 |
req->data = newSVsv (newpath); |
1214 |
req->dataptr = SvPVbyte_nolen (req->data); |
1215 |
|
1216 |
REQ_SEND; |
1217 |
} |
1218 |
|
1219 |
void |
1220 |
aio_sleep (delay,callback=&PL_sv_undef) |
1221 |
double delay |
1222 |
SV * callback |
1223 |
PPCODE: |
1224 |
{ |
1225 |
dREQ; |
1226 |
|
1227 |
req->type = REQ_SLEEP; |
1228 |
req->fd = delay < 0. ? 0 : delay; |
1229 |
req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd); |
1230 |
|
1231 |
REQ_SEND; |
1232 |
} |
1233 |
|
1234 |
void |
1235 |
aio_group (callback=&PL_sv_undef) |
1236 |
SV * callback |
1237 |
PROTOTYPE: ;$ |
1238 |
PPCODE: |
1239 |
{ |
1240 |
dREQ; |
1241 |
|
1242 |
req->type = REQ_GROUP; |
1243 |
req_send (req); |
1244 |
|
1245 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
1246 |
} |
1247 |
|
1248 |
void |
1249 |
aio_nop (callback=&PL_sv_undef) |
1250 |
SV * callback |
1251 |
PPCODE: |
1252 |
{ |
1253 |
dREQ; |
1254 |
|
1255 |
req->type = REQ_NOP; |
1256 |
|
1257 |
REQ_SEND; |
1258 |
} |
1259 |
|
1260 |
#if 0 |
1261 |
|
1262 |
void |
1263 |
aio_pri (int pri = DEFAULT_PRI) |
1264 |
CODE: |
1265 |
if (pri > PRI_MIN) pri = PRI_MIN; |
1266 |
if (pri < PRI_MAX) pri = PRI_MAX; |
1267 |
next_pri = pri + PRI_BIAS; |
1268 |
|
1269 |
#endif |
1270 |
|
1271 |
void |
1272 |
flush () |
1273 |
PROTOTYPE: |
1274 |
CODE: |
1275 |
while (nreqs) |
1276 |
{ |
1277 |
poll_wait (); |
1278 |
poll_cb (); |
1279 |
} |
1280 |
|
1281 |
void |
1282 |
poll() |
1283 |
PROTOTYPE: |
1284 |
CODE: |
1285 |
if (nreqs) |
1286 |
{ |
1287 |
poll_wait (); |
1288 |
poll_cb (); |
1289 |
} |
1290 |
|
1291 |
int |
1292 |
poll_fileno() |
1293 |
PROTOTYPE: |
1294 |
CODE: |
1295 |
RETVAL = respipe [0]; |
1296 |
OUTPUT: |
1297 |
RETVAL |
1298 |
|
1299 |
int |
1300 |
poll_cb(...) |
1301 |
PROTOTYPE: |
1302 |
CODE: |
1303 |
RETVAL = poll_cb (); |
1304 |
OUTPUT: |
1305 |
RETVAL |
1306 |
|
1307 |
void |
1308 |
poll_wait() |
1309 |
PROTOTYPE: |
1310 |
CODE: |
1311 |
if (nreqs) |
1312 |
poll_wait (); |
1313 |
|
1314 |
int |
1315 |
nreqs() |
1316 |
PROTOTYPE: |
1317 |
CODE: |
1318 |
RETVAL = nreqs; |
1319 |
OUTPUT: |
1320 |
RETVAL |
1321 |
|
1322 |
PROTOTYPES: DISABLE |
1323 |
|
1324 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
1325 |
|
1326 |
void |
1327 |
cancel (aio_req_ornot req) |
1328 |
PROTOTYPE: |
1329 |
CODE: |
1330 |
req_cancel (req); |
1331 |
|
1332 |
void |
1333 |
cb (aio_req_ornot req, SV *callback=&PL_sv_undef) |
1334 |
CODE: |
1335 |
SvREFCNT_dec (req->callback); |
1336 |
req->callback = newSVsv (callback); |
1337 |
|
1338 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
1339 |
|
1340 |
void |
1341 |
add (aio_req grp, ...) |
1342 |
PPCODE: |
1343 |
{ |
1344 |
int i; |
1345 |
aio_req req; |
1346 |
|
1347 |
if (grp->fd == 2) |
1348 |
croak ("cannot add requests to IO::AIO::GRP after the group finished"); |
1349 |
|
1350 |
for (i = 1; i < items; ++i ) |
1351 |
{ |
1352 |
if (GIMME_V != G_VOID) |
1353 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
1354 |
|
1355 |
req = SvAIO_REQ (ST (i)); |
1356 |
|
1357 |
if (req) |
1358 |
{ |
1359 |
++grp->length; |
1360 |
req->grp = grp; |
1361 |
|
1362 |
req->grp_prev = 0; |
1363 |
req->grp_next = grp->grp_first; |
1364 |
|
1365 |
if (grp->grp_first) |
1366 |
grp->grp_first->grp_prev = req; |
1367 |
|
1368 |
grp->grp_first = req; |
1369 |
} |
1370 |
} |
1371 |
} |
1372 |
|
1373 |
void |
1374 |
result (aio_req grp, ...) |
1375 |
CODE: |
1376 |
{ |
1377 |
int i; |
1378 |
AV *av = newAV (); |
1379 |
|
1380 |
for (i = 1; i < items; ++i ) |
1381 |
av_push (av, newSVsv (ST (i))); |
1382 |
|
1383 |
SvREFCNT_dec (grp->data); |
1384 |
grp->data = (SV *)av; |
1385 |
} |
1386 |
|
1387 |
void |
1388 |
feed_limit (aio_req grp, int limit) |
1389 |
CODE: |
1390 |
grp->fd2 = limit; |
1391 |
aio_grp_feed (grp); |
1392 |
|
1393 |
void |
1394 |
feed (aio_req grp, SV *callback=&PL_sv_undef) |
1395 |
CODE: |
1396 |
{ |
1397 |
SvREFCNT_dec (grp->fh2); |
1398 |
grp->fh2 = newSVsv (callback); |
1399 |
|
1400 |
if (grp->fd2 <= 0) |
1401 |
grp->fd2 = 2; |
1402 |
|
1403 |
aio_grp_feed (grp); |
1404 |
} |
1405 |
|