1 |
/* solaris */ |
2 |
#define _POSIX_PTHREAD_SEMANTICS 1 |
3 |
|
4 |
#if __linux && !defined(_GNU_SOURCE) |
5 |
# define _GNU_SOURCE |
6 |
#endif |
7 |
|
8 |
/* just in case */ |
9 |
#define _REENTRANT 1 |
10 |
|
11 |
#include <errno.h> |
12 |
|
13 |
#include "EXTERN.h" |
14 |
#include "perl.h" |
15 |
#include "XSUB.h" |
16 |
|
17 |
#include "autoconf/config.h" |
18 |
|
19 |
#include <pthread.h> |
20 |
|
21 |
#include <stddef.h> |
22 |
#include <errno.h> |
23 |
#include <sys/time.h> |
24 |
#include <sys/select.h> |
25 |
#include <sys/types.h> |
26 |
#include <sys/stat.h> |
27 |
#include <limits.h> |
28 |
#include <unistd.h> |
29 |
#include <fcntl.h> |
30 |
#include <signal.h> |
31 |
#include <sched.h> |
32 |
|
33 |
#if HAVE_SENDFILE |
34 |
# if __linux |
35 |
# include <sys/sendfile.h> |
36 |
# elif __freebsd |
37 |
# include <sys/socket.h> |
38 |
# include <sys/uio.h> |
39 |
# elif __hpux |
40 |
# include <sys/socket.h> |
41 |
# elif __solaris /* not yet */ |
42 |
# include <sys/sendfile.h> |
43 |
# else |
44 |
# error sendfile support requested but not available |
45 |
# endif |
46 |
#endif |
47 |
|
48 |
/* used for struct dirent, AIX doesn't provide it */ |
49 |
#ifndef NAME_MAX |
50 |
# define NAME_MAX 4096 |
51 |
#endif |
52 |
|
53 |
#ifndef PTHREAD_STACK_MIN |
54 |
/* care for broken platforms, e.g. windows */ |
55 |
# define PTHREAD_STACK_MIN 16384 |
56 |
#endif |
57 |
|
58 |
#if __ia64 |
59 |
# define STACKSIZE 65536 |
60 |
#elif __i386 || __x86_64 /* 16k is unreasonably high :( */ |
61 |
# define STACKSIZE PTHREAD_STACK_MIN |
62 |
#else |
63 |
# define STACKSIZE 16384 |
64 |
#endif |
65 |
|
66 |
/* wether word reads are potentially non-atomic. |
67 |
* this is conservatice, likely most arches this runs |
68 |
* on have atomic word read/writes. |
69 |
*/ |
70 |
#ifndef WORDREAD_UNSAFE |
71 |
# if __i386 || __x86_64 |
72 |
# define WORDREAD_UNSAFE 0 |
73 |
# else |
74 |
# define WORDREAD_UNSAFE 1 |
75 |
# endif |
76 |
#endif |
77 |
|
78 |
/* buffer size for various temporary buffers */ |
79 |
#define AIO_BUFSIZE 65536 |
80 |
|
81 |
#define dBUF \ |
82 |
char *aio_buf; \ |
83 |
LOCK (wrklock); \ |
84 |
self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \ |
85 |
UNLOCK (wrklock); \ |
86 |
if (!aio_buf) \ |
87 |
return -1; |
88 |
|
89 |
enum { |
90 |
REQ_QUIT, |
91 |
REQ_OPEN, REQ_CLOSE, |
92 |
REQ_READ, REQ_WRITE, REQ_READAHEAD, |
93 |
REQ_SENDFILE, |
94 |
REQ_STAT, REQ_LSTAT, REQ_FSTAT, |
95 |
REQ_FSYNC, REQ_FDATASYNC, |
96 |
REQ_UNLINK, REQ_RMDIR, REQ_RENAME, |
97 |
REQ_READDIR, |
98 |
REQ_LINK, REQ_SYMLINK, |
99 |
REQ_GROUP, REQ_NOP, |
100 |
REQ_BUSY, |
101 |
}; |
102 |
|
103 |
#define AIO_REQ_KLASS "IO::AIO::REQ" |
104 |
#define AIO_GRP_KLASS "IO::AIO::GRP" |
105 |
|
106 |
typedef struct aio_cb |
107 |
{ |
108 |
struct aio_cb *volatile next; |
109 |
|
110 |
SV *data, *callback; |
111 |
SV *fh, *fh2; |
112 |
void *dataptr, *data2ptr; |
113 |
Stat_t *statdata; |
114 |
off_t offset; |
115 |
size_t length; |
116 |
ssize_t result; |
117 |
|
118 |
STRLEN dataoffset; |
119 |
int type; |
120 |
int fd, fd2; |
121 |
int errorno; |
122 |
mode_t mode; /* open */ |
123 |
|
124 |
unsigned char flags; |
125 |
unsigned char pri; |
126 |
|
127 |
SV *self; /* the perl counterpart of this request, if any */ |
128 |
struct aio_cb *grp, *grp_prev, *grp_next, *grp_first; |
129 |
} aio_cb; |
130 |
|
131 |
enum { |
132 |
FLAG_CANCELLED = 0x01, |
133 |
}; |
134 |
|
135 |
typedef aio_cb *aio_req; |
136 |
typedef aio_cb *aio_req_ornot; |
137 |
|
138 |
enum { |
139 |
PRI_MIN = -4, |
140 |
PRI_MAX = 4, |
141 |
|
142 |
DEFAULT_PRI = 0, |
143 |
PRI_BIAS = -PRI_MIN, |
144 |
NUM_PRI = PRI_MAX + PRI_BIAS + 1, |
145 |
}; |
146 |
|
147 |
static int next_pri = DEFAULT_PRI + PRI_BIAS; |
148 |
|
149 |
static unsigned int started, wanted; |
150 |
static volatile unsigned int nreqs, nready, npending; |
151 |
static volatile unsigned int max_outstanding = 0xffffffff; |
152 |
static int respipe [2]; |
153 |
|
154 |
#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP) |
155 |
# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP |
156 |
#else |
157 |
# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER |
158 |
#endif |
159 |
|
160 |
#define LOCK(mutex) pthread_mutex_lock (&(mutex)) |
161 |
#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex)) |
162 |
|
163 |
/* worker threads management */ |
164 |
static pthread_mutex_t wrklock = AIO_MUTEX_INIT; |
165 |
|
166 |
typedef struct worker { |
167 |
/* locked by wrklock */ |
168 |
struct worker *prev, *next; |
169 |
|
170 |
pthread_t tid; |
171 |
|
172 |
/* locked by reslock, reqlock or wrklock */ |
173 |
aio_req req; /* currently processed request */ |
174 |
void *dbuf; |
175 |
DIR *dirp; |
176 |
} worker; |
177 |
|
178 |
static worker wrk_first = { &wrk_first, &wrk_first, 0 }; |
179 |
|
180 |
static void worker_clear (worker *wrk) |
181 |
{ |
182 |
if (wrk->dirp) |
183 |
{ |
184 |
closedir (wrk->dirp); |
185 |
wrk->dirp = 0; |
186 |
} |
187 |
|
188 |
if (wrk->dbuf) |
189 |
{ |
190 |
free (wrk->dbuf); |
191 |
wrk->dbuf = 0; |
192 |
} |
193 |
} |
194 |
|
195 |
static void worker_free (worker *wrk) |
196 |
{ |
197 |
wrk->next->prev = wrk->prev; |
198 |
wrk->prev->next = wrk->next; |
199 |
|
200 |
free (wrk); |
201 |
} |
202 |
|
203 |
static pthread_mutex_t reslock = AIO_MUTEX_INIT; |
204 |
static pthread_mutex_t reqlock = AIO_MUTEX_INIT; |
205 |
static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; |
206 |
|
207 |
/* |
208 |
* a somewhat faster data structure might be nice, but |
209 |
* with 8 priorities this actually needs <20 insns |
210 |
* per shift, the most expensive operation. |
211 |
*/ |
212 |
typedef struct { |
213 |
aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */ |
214 |
int size; |
215 |
} reqq; |
216 |
|
217 |
static reqq req_queue; |
218 |
static reqq res_queue; |
219 |
|
220 |
int reqq_push (reqq *q, aio_req req) |
221 |
{ |
222 |
int pri = req->pri; |
223 |
req->next = 0; |
224 |
|
225 |
if (q->qe[pri]) |
226 |
{ |
227 |
q->qe[pri]->next = req; |
228 |
q->qe[pri] = req; |
229 |
} |
230 |
else |
231 |
q->qe[pri] = q->qs[pri] = req; |
232 |
|
233 |
return q->size++; |
234 |
} |
235 |
|
236 |
aio_req reqq_shift (reqq *q) |
237 |
{ |
238 |
int pri; |
239 |
|
240 |
if (!q->size) |
241 |
return 0; |
242 |
|
243 |
--q->size; |
244 |
|
245 |
for (pri = NUM_PRI; pri--; ) |
246 |
{ |
247 |
aio_req req = q->qs[pri]; |
248 |
|
249 |
if (req) |
250 |
{ |
251 |
if (!(q->qs[pri] = req->next)) |
252 |
q->qe[pri] = 0; |
253 |
|
254 |
return req; |
255 |
} |
256 |
} |
257 |
|
258 |
abort (); |
259 |
} |
260 |
|
261 |
static int poll_cb (int max); |
262 |
static void req_invoke (aio_req req); |
263 |
static void req_free (aio_req req); |
264 |
static void req_cancel (aio_req req); |
265 |
|
266 |
/* must be called at most once */ |
267 |
static SV *req_sv (aio_req req, const char *klass) |
268 |
{ |
269 |
if (!req->self) |
270 |
{ |
271 |
req->self = (SV *)newHV (); |
272 |
sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); |
273 |
} |
274 |
|
275 |
return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1))); |
276 |
} |
277 |
|
278 |
static aio_req SvAIO_REQ (SV *sv) |
279 |
{ |
280 |
MAGIC *mg; |
281 |
|
282 |
if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv)) |
283 |
croak ("object of class " AIO_REQ_KLASS " expected"); |
284 |
|
285 |
mg = mg_find (SvRV (sv), PERL_MAGIC_ext); |
286 |
|
287 |
return mg ? (aio_req)mg->mg_ptr : 0; |
288 |
} |
289 |
|
290 |
static void aio_grp_feed (aio_req grp) |
291 |
{ |
292 |
while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED)) |
293 |
{ |
294 |
int old_len = grp->length; |
295 |
|
296 |
if (grp->fh2 && SvOK (grp->fh2)) |
297 |
{ |
298 |
dSP; |
299 |
|
300 |
ENTER; |
301 |
SAVETMPS; |
302 |
PUSHMARK (SP); |
303 |
XPUSHs (req_sv (grp, AIO_GRP_KLASS)); |
304 |
PUTBACK; |
305 |
call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR); |
306 |
SPAGAIN; |
307 |
FREETMPS; |
308 |
LEAVE; |
309 |
} |
310 |
|
311 |
/* stop if no progress has been made */ |
312 |
if (old_len == grp->length) |
313 |
{ |
314 |
SvREFCNT_dec (grp->fh2); |
315 |
grp->fh2 = 0; |
316 |
break; |
317 |
} |
318 |
} |
319 |
} |
320 |
|
321 |
static void aio_grp_dec (aio_req grp) |
322 |
{ |
323 |
--grp->length; |
324 |
|
325 |
/* call feeder, if applicable */ |
326 |
aio_grp_feed (grp); |
327 |
|
328 |
/* finish, if done */ |
329 |
if (!grp->length && grp->fd) |
330 |
{ |
331 |
req_invoke (grp); |
332 |
req_free (grp); |
333 |
} |
334 |
} |
335 |
|
336 |
static void poll_wait () |
337 |
{ |
338 |
fd_set rfd; |
339 |
|
340 |
while (nreqs) |
341 |
{ |
342 |
int size; |
343 |
if (WORDREAD_UNSAFE) LOCK (reslock); |
344 |
size = res_queue.size; |
345 |
if (WORDREAD_UNSAFE) UNLOCK (reslock); |
346 |
|
347 |
if (size) |
348 |
return; |
349 |
|
350 |
FD_ZERO(&rfd); |
351 |
FD_SET(respipe [0], &rfd); |
352 |
|
353 |
select (respipe [0] + 1, &rfd, 0, 0, 0); |
354 |
} |
355 |
} |
356 |
|
357 |
static void req_invoke (aio_req req) |
358 |
{ |
359 |
dSP; |
360 |
|
361 |
if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback)) |
362 |
{ |
363 |
ENTER; |
364 |
SAVETMPS; |
365 |
PUSHMARK (SP); |
366 |
EXTEND (SP, 1); |
367 |
|
368 |
switch (req->type) |
369 |
{ |
370 |
case REQ_READDIR: |
371 |
{ |
372 |
SV *rv = &PL_sv_undef; |
373 |
|
374 |
if (req->result >= 0) |
375 |
{ |
376 |
int i; |
377 |
char *buf = req->data2ptr; |
378 |
AV *av = newAV (); |
379 |
|
380 |
av_extend (av, req->result - 1); |
381 |
|
382 |
for (i = 0; i < req->result; ++i) |
383 |
{ |
384 |
SV *sv = newSVpv (buf, 0); |
385 |
|
386 |
av_store (av, i, sv); |
387 |
buf += SvCUR (sv) + 1; |
388 |
} |
389 |
|
390 |
rv = sv_2mortal (newRV_noinc ((SV *)av)); |
391 |
} |
392 |
|
393 |
PUSHs (rv); |
394 |
} |
395 |
break; |
396 |
|
397 |
case REQ_OPEN: |
398 |
{ |
399 |
/* convert fd to fh */ |
400 |
SV *fh; |
401 |
|
402 |
PUSHs (sv_2mortal (newSViv (req->result))); |
403 |
PUTBACK; |
404 |
call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); |
405 |
SPAGAIN; |
406 |
|
407 |
fh = SvREFCNT_inc (POPs); |
408 |
|
409 |
PUSHMARK (SP); |
410 |
XPUSHs (sv_2mortal (fh)); |
411 |
} |
412 |
break; |
413 |
|
414 |
case REQ_GROUP: |
415 |
req->fd = 2; /* mark group as finished */ |
416 |
|
417 |
if (req->data) |
418 |
{ |
419 |
int i; |
420 |
AV *av = (AV *)req->data; |
421 |
|
422 |
EXTEND (SP, AvFILL (av) + 1); |
423 |
for (i = 0; i <= AvFILL (av); ++i) |
424 |
PUSHs (*av_fetch (av, i, 0)); |
425 |
} |
426 |
break; |
427 |
|
428 |
case REQ_NOP: |
429 |
case REQ_BUSY: |
430 |
break; |
431 |
|
432 |
default: |
433 |
PUSHs (sv_2mortal (newSViv (req->result))); |
434 |
break; |
435 |
} |
436 |
|
437 |
errno = req->errorno; |
438 |
|
439 |
PUTBACK; |
440 |
call_sv (req->callback, G_VOID | G_EVAL); |
441 |
SPAGAIN; |
442 |
|
443 |
FREETMPS; |
444 |
LEAVE; |
445 |
} |
446 |
|
447 |
if (req->grp) |
448 |
{ |
449 |
aio_req grp = req->grp; |
450 |
|
451 |
/* unlink request */ |
452 |
if (req->grp_next) req->grp_next->grp_prev = req->grp_prev; |
453 |
if (req->grp_prev) req->grp_prev->grp_next = req->grp_next; |
454 |
|
455 |
if (grp->grp_first == req) |
456 |
grp->grp_first = req->grp_next; |
457 |
|
458 |
aio_grp_dec (grp); |
459 |
} |
460 |
|
461 |
if (SvTRUE (ERRSV)) |
462 |
{ |
463 |
req_free (req); |
464 |
croak (0); |
465 |
} |
466 |
} |
467 |
|
468 |
static void req_free (aio_req req) |
469 |
{ |
470 |
if (req->self) |
471 |
{ |
472 |
sv_unmagic (req->self, PERL_MAGIC_ext); |
473 |
SvREFCNT_dec (req->self); |
474 |
} |
475 |
|
476 |
SvREFCNT_dec (req->data); |
477 |
SvREFCNT_dec (req->fh); |
478 |
SvREFCNT_dec (req->fh2); |
479 |
SvREFCNT_dec (req->callback); |
480 |
Safefree (req->statdata); |
481 |
|
482 |
if (req->type == REQ_READDIR) |
483 |
free (req->data2ptr); |
484 |
|
485 |
Safefree (req); |
486 |
} |
487 |
|
488 |
static void req_cancel_subs (aio_req grp) |
489 |
{ |
490 |
aio_req sub; |
491 |
|
492 |
if (grp->type != REQ_GROUP) |
493 |
return; |
494 |
|
495 |
SvREFCNT_dec (grp->fh2); |
496 |
grp->fh2 = 0; |
497 |
|
498 |
for (sub = grp->grp_first; sub; sub = sub->grp_next) |
499 |
req_cancel (sub); |
500 |
} |
501 |
|
502 |
static void req_cancel (aio_req req) |
503 |
{ |
504 |
req->flags |= FLAG_CANCELLED; |
505 |
|
506 |
req_cancel_subs (req); |
507 |
} |
508 |
|
509 |
static int poll_cb (int max) |
510 |
{ |
511 |
dSP; |
512 |
int count = 0; |
513 |
int do_croak = 0; |
514 |
aio_req req; |
515 |
|
516 |
for (;;) |
517 |
{ |
518 |
while (max <= 0 || count < max) |
519 |
{ |
520 |
LOCK (reslock); |
521 |
req = reqq_shift (&res_queue); |
522 |
|
523 |
if (req) |
524 |
{ |
525 |
--npending; |
526 |
|
527 |
if (!res_queue.size) |
528 |
{ |
529 |
/* read any signals sent by the worker threads */ |
530 |
char buf [32]; |
531 |
while (read (respipe [0], buf, 32) == 32) |
532 |
; |
533 |
} |
534 |
} |
535 |
|
536 |
UNLOCK (reslock); |
537 |
|
538 |
if (!req) |
539 |
break; |
540 |
|
541 |
--nreqs; |
542 |
|
543 |
if (req->type == REQ_QUIT) |
544 |
--started; |
545 |
else if (req->type == REQ_GROUP && req->length) |
546 |
{ |
547 |
req->fd = 1; /* mark request as delayed */ |
548 |
continue; |
549 |
} |
550 |
else |
551 |
{ |
552 |
if (req->type == REQ_READ) |
553 |
SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); |
554 |
|
555 |
if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) |
556 |
SvREADONLY_off (req->data); |
557 |
|
558 |
if (req->statdata) |
559 |
{ |
560 |
PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; |
561 |
PL_laststatval = req->result; |
562 |
PL_statcache = *(req->statdata); |
563 |
} |
564 |
|
565 |
req_invoke (req); |
566 |
|
567 |
count++; |
568 |
} |
569 |
|
570 |
req_free (req); |
571 |
} |
572 |
|
573 |
if (nreqs <= max_outstanding) |
574 |
break; |
575 |
|
576 |
poll_wait (); |
577 |
|
578 |
max = 0; |
579 |
} |
580 |
|
581 |
return count; |
582 |
} |
583 |
|
584 |
static void *aio_proc(void *arg); |
585 |
|
586 |
static void start_thread (void) |
587 |
{ |
588 |
sigset_t fullsigset, oldsigset; |
589 |
pthread_attr_t attr; |
590 |
|
591 |
worker *wrk = calloc (1, sizeof (worker)); |
592 |
|
593 |
if (!wrk) |
594 |
croak ("unable to allocate worker thread data"); |
595 |
|
596 |
pthread_attr_init (&attr); |
597 |
pthread_attr_setstacksize (&attr, STACKSIZE); |
598 |
pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); |
599 |
|
600 |
sigfillset (&fullsigset); |
601 |
|
602 |
LOCK (wrklock); |
603 |
sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); |
604 |
|
605 |
if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0) |
606 |
{ |
607 |
wrk->prev = &wrk_first; |
608 |
wrk->next = wrk_first.next; |
609 |
wrk_first.next->prev = wrk; |
610 |
wrk_first.next = wrk; |
611 |
++started; |
612 |
} |
613 |
else |
614 |
free (wrk); |
615 |
|
616 |
sigprocmask (SIG_SETMASK, &oldsigset, 0); |
617 |
UNLOCK (wrklock); |
618 |
} |
619 |
|
620 |
static void req_send (aio_req req) |
621 |
{ |
622 |
while (started < wanted && nreqs >= started) |
623 |
start_thread (); |
624 |
|
625 |
++nreqs; |
626 |
|
627 |
LOCK (reqlock); |
628 |
++nready; |
629 |
reqq_push (&req_queue, req); |
630 |
pthread_cond_signal (&reqwait); |
631 |
UNLOCK (reqlock); |
632 |
} |
633 |
|
634 |
static void end_thread (void) |
635 |
{ |
636 |
aio_req req; |
637 |
|
638 |
Newz (0, req, 1, aio_cb); |
639 |
|
640 |
req->type = REQ_QUIT; |
641 |
req->pri = PRI_MAX + PRI_BIAS; |
642 |
|
643 |
req_send (req); |
644 |
} |
645 |
|
646 |
static void min_parallel (int nthreads) |
647 |
{ |
648 |
if (wanted < nthreads) |
649 |
wanted = nthreads; |
650 |
} |
651 |
|
652 |
static void max_parallel (int nthreads) |
653 |
{ |
654 |
int cur = started; |
655 |
|
656 |
if (wanted > nthreads) |
657 |
wanted = nthreads; |
658 |
|
659 |
while (cur > wanted) |
660 |
{ |
661 |
end_thread (); |
662 |
cur--; |
663 |
} |
664 |
|
665 |
while (started > wanted) |
666 |
{ |
667 |
poll_wait (); |
668 |
poll_cb (0); |
669 |
} |
670 |
} |
671 |
|
672 |
static void create_pipe () |
673 |
{ |
674 |
if (pipe (respipe)) |
675 |
croak ("unable to initialize result pipe"); |
676 |
|
677 |
if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) |
678 |
croak ("cannot set result pipe to nonblocking mode"); |
679 |
|
680 |
if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) |
681 |
croak ("cannot set result pipe to nonblocking mode"); |
682 |
} |
683 |
|
684 |
/*****************************************************************************/ |
685 |
/* work around various missing functions */ |
686 |
|
687 |
#if !HAVE_PREADWRITE |
688 |
# define pread aio_pread |
689 |
# define pwrite aio_pwrite |
690 |
|
691 |
/* |
692 |
* make our pread/pwrite safe against themselves, but not against |
693 |
* normal read/write by using a mutex. slows down execution a lot, |
694 |
* but that's your problem, not mine. |
695 |
*/ |
696 |
static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; |
697 |
|
698 |
static ssize_t pread (int fd, void *buf, size_t count, off_t offset) |
699 |
{ |
700 |
ssize_t res; |
701 |
off_t ooffset; |
702 |
|
703 |
LOCK (preadwritelock); |
704 |
ooffset = lseek (fd, 0, SEEK_CUR); |
705 |
lseek (fd, offset, SEEK_SET); |
706 |
res = read (fd, buf, count); |
707 |
lseek (fd, ooffset, SEEK_SET); |
708 |
UNLOCK (preadwritelock); |
709 |
|
710 |
return res; |
711 |
} |
712 |
|
713 |
static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset) |
714 |
{ |
715 |
ssize_t res; |
716 |
off_t ooffset; |
717 |
|
718 |
LOCK (preadwritelock); |
719 |
ooffset = lseek (fd, 0, SEEK_CUR); |
720 |
lseek (fd, offset, SEEK_SET); |
721 |
res = write (fd, buf, count); |
722 |
lseek (fd, offset, SEEK_SET); |
723 |
UNLOCK (preadwritelock); |
724 |
|
725 |
return res; |
726 |
} |
727 |
#endif |
728 |
|
729 |
#if !HAVE_FDATASYNC |
730 |
# define fdatasync fsync |
731 |
#endif |
732 |
|
733 |
#if !HAVE_READAHEAD |
734 |
# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self) |
735 |
|
736 |
static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self) |
737 |
{ |
738 |
dBUF; |
739 |
|
740 |
while (count > 0) |
741 |
{ |
742 |
size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE; |
743 |
|
744 |
pread (fd, aio_buf, len, offset); |
745 |
offset += len; |
746 |
count -= len; |
747 |
} |
748 |
|
749 |
errno = 0; |
750 |
} |
751 |
|
752 |
#endif |
753 |
|
754 |
#if !HAVE_READDIR_R |
755 |
# define readdir_r aio_readdir_r |
756 |
|
757 |
static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; |
758 |
|
759 |
static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) |
760 |
{ |
761 |
struct dirent *e; |
762 |
int errorno; |
763 |
|
764 |
LOCK (readdirlock); |
765 |
|
766 |
e = readdir (dirp); |
767 |
errorno = errno; |
768 |
|
769 |
if (e) |
770 |
{ |
771 |
*res = ent; |
772 |
strcpy (ent->d_name, e->d_name); |
773 |
} |
774 |
else |
775 |
*res = 0; |
776 |
|
777 |
UNLOCK (readdirlock); |
778 |
|
779 |
errno = errorno; |
780 |
return e ? 0 : -1; |
781 |
} |
782 |
#endif |
783 |
|
784 |
/* sendfile always needs emulation */ |
785 |
static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self) |
786 |
{ |
787 |
ssize_t res; |
788 |
|
789 |
if (!count) |
790 |
return 0; |
791 |
|
792 |
#if HAVE_SENDFILE |
793 |
# if __linux |
794 |
res = sendfile (ofd, ifd, &offset, count); |
795 |
|
796 |
# elif __freebsd |
797 |
/* |
798 |
* Of course, the freebsd sendfile is a dire hack with no thoughts |
799 |
* wasted on making it similar to other I/O functions. |
800 |
*/ |
801 |
{ |
802 |
off_t sbytes; |
803 |
res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); |
804 |
|
805 |
if (res < 0 && sbytes) |
806 |
/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */ |
807 |
res = sbytes; |
808 |
} |
809 |
|
810 |
# elif __hpux |
811 |
res = sendfile (ofd, ifd, offset, count, 0, 0); |
812 |
|
813 |
# elif __solaris |
814 |
{ |
815 |
struct sendfilevec vec; |
816 |
size_t sbytes; |
817 |
|
818 |
vec.sfv_fd = ifd; |
819 |
vec.sfv_flag = 0; |
820 |
vec.sfv_off = offset; |
821 |
vec.sfv_len = count; |
822 |
|
823 |
res = sendfilev (ofd, &vec, 1, &sbytes); |
824 |
|
825 |
if (res < 0 && sbytes) |
826 |
res = sbytes; |
827 |
} |
828 |
|
829 |
# endif |
830 |
#else |
831 |
res = -1; |
832 |
errno = ENOSYS; |
833 |
#endif |
834 |
|
835 |
if (res < 0 |
836 |
&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK |
837 |
#if __solaris |
838 |
|| errno == EAFNOSUPPORT || errno == EPROTOTYPE |
839 |
#endif |
840 |
) |
841 |
) |
842 |
{ |
843 |
/* emulate sendfile. this is a major pain in the ass */ |
844 |
dBUF; |
845 |
|
846 |
res = 0; |
847 |
|
848 |
while (count) |
849 |
{ |
850 |
ssize_t cnt; |
851 |
|
852 |
cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset); |
853 |
|
854 |
if (cnt <= 0) |
855 |
{ |
856 |
if (cnt && !res) res = -1; |
857 |
break; |
858 |
} |
859 |
|
860 |
cnt = write (ofd, aio_buf, cnt); |
861 |
|
862 |
if (cnt <= 0) |
863 |
{ |
864 |
if (cnt && !res) res = -1; |
865 |
break; |
866 |
} |
867 |
|
868 |
offset += cnt; |
869 |
res += cnt; |
870 |
count -= cnt; |
871 |
} |
872 |
} |
873 |
|
874 |
return res; |
875 |
} |
876 |
|
877 |
/* read a full directory */ |
878 |
static void scandir_ (aio_req req, worker *self) |
879 |
{ |
880 |
DIR *dirp; |
881 |
union |
882 |
{ |
883 |
struct dirent d; |
884 |
char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; |
885 |
} *u; |
886 |
struct dirent *entp; |
887 |
char *name, *names; |
888 |
int memlen = 4096; |
889 |
int memofs = 0; |
890 |
int res = 0; |
891 |
int errorno; |
892 |
|
893 |
LOCK (wrklock); |
894 |
self->dirp = dirp = opendir (req->dataptr); |
895 |
self->dbuf = u = malloc (sizeof (*u)); |
896 |
req->data2ptr = names = malloc (memlen); |
897 |
UNLOCK (wrklock); |
898 |
|
899 |
if (dirp && u && names) |
900 |
for (;;) |
901 |
{ |
902 |
errno = 0; |
903 |
readdir_r (dirp, &u->d, &entp); |
904 |
|
905 |
if (!entp) |
906 |
break; |
907 |
|
908 |
name = entp->d_name; |
909 |
|
910 |
if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2]))) |
911 |
{ |
912 |
int len = strlen (name) + 1; |
913 |
|
914 |
res++; |
915 |
|
916 |
while (memofs + len > memlen) |
917 |
{ |
918 |
memlen *= 2; |
919 |
LOCK (wrklock); |
920 |
req->data2ptr = names = realloc (names, memlen); |
921 |
UNLOCK (wrklock); |
922 |
|
923 |
if (!names) |
924 |
break; |
925 |
} |
926 |
|
927 |
memcpy (names + memofs, name, len); |
928 |
memofs += len; |
929 |
} |
930 |
} |
931 |
|
932 |
if (errno) |
933 |
res = -1; |
934 |
|
935 |
req->result = res; |
936 |
} |
937 |
|
938 |
/*****************************************************************************/ |
939 |
|
940 |
static void *aio_proc (void *thr_arg) |
941 |
{ |
942 |
aio_req req; |
943 |
int type; |
944 |
worker *self = (worker *)thr_arg; |
945 |
|
946 |
do |
947 |
{ |
948 |
LOCK (reqlock); |
949 |
|
950 |
for (;;) |
951 |
{ |
952 |
self->req = req = reqq_shift (&req_queue); |
953 |
|
954 |
if (req) |
955 |
break; |
956 |
|
957 |
pthread_cond_wait (&reqwait, &reqlock); |
958 |
} |
959 |
|
960 |
--nready; |
961 |
|
962 |
UNLOCK (reqlock); |
963 |
|
964 |
errno = 0; /* strictly unnecessary */ |
965 |
type = req->type; /* remember type for QUIT check */ |
966 |
|
967 |
if (!(req->flags & FLAG_CANCELLED)) |
968 |
switch (type) |
969 |
{ |
970 |
case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; |
971 |
case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; |
972 |
|
973 |
case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; |
974 |
case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break; |
975 |
|
976 |
case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; |
977 |
case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; |
978 |
case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; |
979 |
|
980 |
case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; |
981 |
case REQ_CLOSE: req->result = close (req->fd); break; |
982 |
case REQ_UNLINK: req->result = unlink (req->dataptr); break; |
983 |
case REQ_RMDIR: req->result = rmdir (req->dataptr); break; |
984 |
case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; |
985 |
case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; |
986 |
case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; |
987 |
|
988 |
case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; |
989 |
case REQ_FSYNC: req->result = fsync (req->fd); break; |
990 |
case REQ_READDIR: scandir_ (req, self); break; |
991 |
|
992 |
case REQ_BUSY: |
993 |
{ |
994 |
struct timeval tv; |
995 |
|
996 |
tv.tv_sec = req->fd; |
997 |
tv.tv_usec = req->fd2; |
998 |
|
999 |
req->result = select (0, 0, 0, 0, &tv); |
1000 |
} |
1001 |
|
1002 |
case REQ_GROUP: |
1003 |
case REQ_NOP: |
1004 |
case REQ_QUIT: |
1005 |
break; |
1006 |
|
1007 |
default: |
1008 |
req->result = ENOSYS; |
1009 |
break; |
1010 |
} |
1011 |
|
1012 |
req->errorno = errno; |
1013 |
|
1014 |
LOCK (reslock); |
1015 |
|
1016 |
++npending; |
1017 |
|
1018 |
if (!reqq_push (&res_queue, req)) |
1019 |
/* write a dummy byte to the pipe so fh becomes ready */ |
1020 |
write (respipe [1], &respipe, 1); |
1021 |
|
1022 |
self->req = 0; |
1023 |
worker_clear (self); |
1024 |
|
1025 |
UNLOCK (reslock); |
1026 |
} |
1027 |
while (type != REQ_QUIT); |
1028 |
|
1029 |
LOCK (wrklock); |
1030 |
worker_free (self); |
1031 |
UNLOCK (wrklock); |
1032 |
|
1033 |
return 0; |
1034 |
} |
1035 |
|
1036 |
/*****************************************************************************/ |
1037 |
|
1038 |
static void atfork_prepare (void) |
1039 |
{ |
1040 |
LOCK (wrklock); |
1041 |
LOCK (reqlock); |
1042 |
LOCK (reslock); |
1043 |
#if !HAVE_PREADWRITE |
1044 |
LOCK (preadwritelock); |
1045 |
#endif |
1046 |
#if !HAVE_READDIR_R |
1047 |
LOCK (readdirlock); |
1048 |
#endif |
1049 |
} |
1050 |
|
1051 |
static void atfork_parent (void) |
1052 |
{ |
1053 |
#if !HAVE_READDIR_R |
1054 |
UNLOCK (readdirlock); |
1055 |
#endif |
1056 |
#if !HAVE_PREADWRITE |
1057 |
UNLOCK (preadwritelock); |
1058 |
#endif |
1059 |
UNLOCK (reslock); |
1060 |
UNLOCK (reqlock); |
1061 |
UNLOCK (wrklock); |
1062 |
} |
1063 |
|
1064 |
static void atfork_child (void) |
1065 |
{ |
1066 |
aio_req prv; |
1067 |
|
1068 |
while (prv = reqq_shift (&req_queue)) |
1069 |
req_free (prv); |
1070 |
|
1071 |
while (prv = reqq_shift (&res_queue)) |
1072 |
req_free (prv); |
1073 |
|
1074 |
while (wrk_first.next != &wrk_first) |
1075 |
{ |
1076 |
worker *wrk = wrk_first.next; |
1077 |
|
1078 |
if (wrk->req) |
1079 |
req_free (wrk->req); |
1080 |
|
1081 |
worker_clear (wrk); |
1082 |
worker_free (wrk); |
1083 |
} |
1084 |
|
1085 |
started = 0; |
1086 |
nreqs = 0; |
1087 |
|
1088 |
close (respipe [0]); |
1089 |
close (respipe [1]); |
1090 |
create_pipe (); |
1091 |
|
1092 |
atfork_parent (); |
1093 |
} |
1094 |
|
1095 |
#define dREQ \ |
1096 |
aio_req req; \ |
1097 |
int req_pri = next_pri; \ |
1098 |
next_pri = DEFAULT_PRI + PRI_BIAS; \ |
1099 |
\ |
1100 |
if (SvOK (callback) && !SvROK (callback)) \ |
1101 |
croak ("callback must be undef or of reference type"); \ |
1102 |
\ |
1103 |
Newz (0, req, 1, aio_cb); \ |
1104 |
if (!req) \ |
1105 |
croak ("out of memory during aio_req allocation"); \ |
1106 |
\ |
1107 |
req->callback = newSVsv (callback); \ |
1108 |
req->pri = req_pri |
1109 |
|
1110 |
#define REQ_SEND \ |
1111 |
req_send (req); \ |
1112 |
\ |
1113 |
if (GIMME_V != G_VOID) \ |
1114 |
XPUSHs (req_sv (req, AIO_REQ_KLASS)); |
1115 |
|
1116 |
MODULE = IO::AIO PACKAGE = IO::AIO |
1117 |
|
1118 |
PROTOTYPES: ENABLE |
1119 |
|
1120 |
BOOT: |
1121 |
{ |
1122 |
HV *stash = gv_stashpv ("IO::AIO", 1); |
1123 |
newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); |
1124 |
newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); |
1125 |
newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); |
1126 |
|
1127 |
create_pipe (); |
1128 |
pthread_atfork (atfork_prepare, atfork_parent, atfork_child); |
1129 |
} |
1130 |
|
1131 |
void |
1132 |
min_parallel (int nthreads) |
1133 |
PROTOTYPE: $ |
1134 |
|
1135 |
void |
1136 |
max_parallel (int nthreads) |
1137 |
PROTOTYPE: $ |
1138 |
|
1139 |
int |
1140 |
max_outstanding (int maxreqs) |
1141 |
PROTOTYPE: $ |
1142 |
CODE: |
1143 |
RETVAL = max_outstanding; |
1144 |
max_outstanding = maxreqs; |
1145 |
OUTPUT: |
1146 |
RETVAL |
1147 |
|
1148 |
void |
1149 |
aio_open (pathname,flags,mode,callback=&PL_sv_undef) |
1150 |
SV * pathname |
1151 |
int flags |
1152 |
int mode |
1153 |
SV * callback |
1154 |
PROTOTYPE: $$$;$ |
1155 |
PPCODE: |
1156 |
{ |
1157 |
dREQ; |
1158 |
|
1159 |
req->type = REQ_OPEN; |
1160 |
req->data = newSVsv (pathname); |
1161 |
req->dataptr = SvPVbyte_nolen (req->data); |
1162 |
req->fd = flags; |
1163 |
req->mode = mode; |
1164 |
|
1165 |
REQ_SEND; |
1166 |
} |
1167 |
|
1168 |
void |
1169 |
aio_close (fh,callback=&PL_sv_undef) |
1170 |
SV * fh |
1171 |
SV * callback |
1172 |
PROTOTYPE: $;$ |
1173 |
ALIAS: |
1174 |
aio_close = REQ_CLOSE |
1175 |
aio_fsync = REQ_FSYNC |
1176 |
aio_fdatasync = REQ_FDATASYNC |
1177 |
PPCODE: |
1178 |
{ |
1179 |
dREQ; |
1180 |
|
1181 |
req->type = ix; |
1182 |
req->fh = newSVsv (fh); |
1183 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1184 |
|
1185 |
REQ_SEND (req); |
1186 |
} |
1187 |
|
1188 |
void |
1189 |
aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef) |
1190 |
SV * fh |
1191 |
UV offset |
1192 |
UV length |
1193 |
SV * data |
1194 |
UV dataoffset |
1195 |
SV * callback |
1196 |
ALIAS: |
1197 |
aio_read = REQ_READ |
1198 |
aio_write = REQ_WRITE |
1199 |
PROTOTYPE: $$$$$;$ |
1200 |
PPCODE: |
1201 |
{ |
1202 |
aio_req req; |
1203 |
STRLEN svlen; |
1204 |
char *svptr = SvPVbyte (data, svlen); |
1205 |
|
1206 |
SvUPGRADE (data, SVt_PV); |
1207 |
SvPOK_on (data); |
1208 |
|
1209 |
if (dataoffset < 0) |
1210 |
dataoffset += svlen; |
1211 |
|
1212 |
if (dataoffset < 0 || dataoffset > svlen) |
1213 |
croak ("data offset outside of string"); |
1214 |
|
1215 |
if (ix == REQ_WRITE) |
1216 |
{ |
1217 |
/* write: check length and adjust. */ |
1218 |
if (length < 0 || length + dataoffset > svlen) |
1219 |
length = svlen - dataoffset; |
1220 |
} |
1221 |
else |
1222 |
{ |
1223 |
/* read: grow scalar as necessary */ |
1224 |
svptr = SvGROW (data, length + dataoffset); |
1225 |
} |
1226 |
|
1227 |
if (length < 0) |
1228 |
croak ("length must not be negative"); |
1229 |
|
1230 |
{ |
1231 |
dREQ; |
1232 |
|
1233 |
req->type = ix; |
1234 |
req->fh = newSVsv (fh); |
1235 |
req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) |
1236 |
: IoOFP (sv_2io (fh))); |
1237 |
req->offset = offset; |
1238 |
req->length = length; |
1239 |
req->data = SvREFCNT_inc (data); |
1240 |
req->dataptr = (char *)svptr + dataoffset; |
1241 |
|
1242 |
if (!SvREADONLY (data)) |
1243 |
{ |
1244 |
SvREADONLY_on (data); |
1245 |
req->data2ptr = (void *)data; |
1246 |
} |
1247 |
|
1248 |
REQ_SEND; |
1249 |
} |
1250 |
} |
1251 |
|
1252 |
void |
1253 |
aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) |
1254 |
SV * out_fh |
1255 |
SV * in_fh |
1256 |
UV in_offset |
1257 |
UV length |
1258 |
SV * callback |
1259 |
PROTOTYPE: $$$$;$ |
1260 |
PPCODE: |
1261 |
{ |
1262 |
dREQ; |
1263 |
|
1264 |
req->type = REQ_SENDFILE; |
1265 |
req->fh = newSVsv (out_fh); |
1266 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh))); |
1267 |
req->fh2 = newSVsv (in_fh); |
1268 |
req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); |
1269 |
req->offset = in_offset; |
1270 |
req->length = length; |
1271 |
|
1272 |
REQ_SEND; |
1273 |
} |
1274 |
|
1275 |
void |
1276 |
aio_readahead (fh,offset,length,callback=&PL_sv_undef) |
1277 |
SV * fh |
1278 |
UV offset |
1279 |
IV length |
1280 |
SV * callback |
1281 |
PROTOTYPE: $$$;$ |
1282 |
PPCODE: |
1283 |
{ |
1284 |
dREQ; |
1285 |
|
1286 |
req->type = REQ_READAHEAD; |
1287 |
req->fh = newSVsv (fh); |
1288 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); |
1289 |
req->offset = offset; |
1290 |
req->length = length; |
1291 |
|
1292 |
REQ_SEND; |
1293 |
} |
1294 |
|
1295 |
void |
1296 |
aio_stat (fh_or_path,callback=&PL_sv_undef) |
1297 |
SV * fh_or_path |
1298 |
SV * callback |
1299 |
ALIAS: |
1300 |
aio_stat = REQ_STAT |
1301 |
aio_lstat = REQ_LSTAT |
1302 |
PPCODE: |
1303 |
{ |
1304 |
dREQ; |
1305 |
|
1306 |
New (0, req->statdata, 1, Stat_t); |
1307 |
if (!req->statdata) |
1308 |
{ |
1309 |
req_free (req); |
1310 |
croak ("out of memory during aio_req->statdata allocation"); |
1311 |
} |
1312 |
|
1313 |
if (SvPOK (fh_or_path)) |
1314 |
{ |
1315 |
req->type = ix; |
1316 |
req->data = newSVsv (fh_or_path); |
1317 |
req->dataptr = SvPVbyte_nolen (req->data); |
1318 |
} |
1319 |
else |
1320 |
{ |
1321 |
req->type = REQ_FSTAT; |
1322 |
req->fh = newSVsv (fh_or_path); |
1323 |
req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); |
1324 |
} |
1325 |
|
1326 |
REQ_SEND; |
1327 |
} |
1328 |
|
1329 |
void |
1330 |
aio_unlink (pathname,callback=&PL_sv_undef) |
1331 |
SV * pathname |
1332 |
SV * callback |
1333 |
ALIAS: |
1334 |
aio_unlink = REQ_UNLINK |
1335 |
aio_rmdir = REQ_RMDIR |
1336 |
aio_readdir = REQ_READDIR |
1337 |
PPCODE: |
1338 |
{ |
1339 |
dREQ; |
1340 |
|
1341 |
req->type = ix; |
1342 |
req->data = newSVsv (pathname); |
1343 |
req->dataptr = SvPVbyte_nolen (req->data); |
1344 |
|
1345 |
REQ_SEND; |
1346 |
} |
1347 |
|
1348 |
void |
1349 |
aio_link (oldpath,newpath,callback=&PL_sv_undef) |
1350 |
SV * oldpath |
1351 |
SV * newpath |
1352 |
SV * callback |
1353 |
ALIAS: |
1354 |
aio_link = REQ_LINK |
1355 |
aio_symlink = REQ_SYMLINK |
1356 |
aio_rename = REQ_RENAME |
1357 |
PPCODE: |
1358 |
{ |
1359 |
dREQ; |
1360 |
|
1361 |
req->type = ix; |
1362 |
req->fh = newSVsv (oldpath); |
1363 |
req->data2ptr = SvPVbyte_nolen (req->fh); |
1364 |
req->data = newSVsv (newpath); |
1365 |
req->dataptr = SvPVbyte_nolen (req->data); |
1366 |
|
1367 |
REQ_SEND; |
1368 |
} |
1369 |
|
1370 |
void |
1371 |
aio_busy (delay,callback=&PL_sv_undef) |
1372 |
double delay |
1373 |
SV * callback |
1374 |
PPCODE: |
1375 |
{ |
1376 |
dREQ; |
1377 |
|
1378 |
req->type = REQ_BUSY; |
1379 |
req->fd = delay < 0. ? 0 : delay; |
1380 |
req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd); |
1381 |
|
1382 |
REQ_SEND; |
1383 |
} |
1384 |
|
1385 |
void |
1386 |
aio_group (callback=&PL_sv_undef) |
1387 |
SV * callback |
1388 |
PROTOTYPE: ;$ |
1389 |
PPCODE: |
1390 |
{ |
1391 |
dREQ; |
1392 |
|
1393 |
req->type = REQ_GROUP; |
1394 |
req_send (req); |
1395 |
|
1396 |
XPUSHs (req_sv (req, AIO_GRP_KLASS)); |
1397 |
} |
1398 |
|
1399 |
void |
1400 |
aio_nop (callback=&PL_sv_undef) |
1401 |
SV * callback |
1402 |
PPCODE: |
1403 |
{ |
1404 |
dREQ; |
1405 |
|
1406 |
req->type = REQ_NOP; |
1407 |
|
1408 |
REQ_SEND; |
1409 |
} |
1410 |
|
1411 |
int |
1412 |
aioreq_pri (int pri = 0) |
1413 |
PROTOTYPE: ;$ |
1414 |
CODE: |
1415 |
RETVAL = next_pri - PRI_BIAS; |
1416 |
if (items > 0) |
1417 |
{ |
1418 |
if (pri < PRI_MIN) pri = PRI_MIN; |
1419 |
if (pri > PRI_MAX) pri = PRI_MAX; |
1420 |
next_pri = pri + PRI_BIAS; |
1421 |
} |
1422 |
OUTPUT: |
1423 |
RETVAL |
1424 |
|
1425 |
void |
1426 |
aioreq_nice (int nice = 0) |
1427 |
CODE: |
1428 |
nice = next_pri - nice; |
1429 |
if (nice < PRI_MIN) nice = PRI_MIN; |
1430 |
if (nice > PRI_MAX) nice = PRI_MAX; |
1431 |
next_pri = nice + PRI_BIAS; |
1432 |
|
1433 |
void |
1434 |
flush () |
1435 |
PROTOTYPE: |
1436 |
CODE: |
1437 |
while (nreqs) |
1438 |
{ |
1439 |
poll_wait (); |
1440 |
poll_cb (0); |
1441 |
} |
1442 |
|
1443 |
void |
1444 |
poll() |
1445 |
PROTOTYPE: |
1446 |
CODE: |
1447 |
if (nreqs) |
1448 |
{ |
1449 |
poll_wait (); |
1450 |
poll_cb (0); |
1451 |
} |
1452 |
|
1453 |
int |
1454 |
poll_fileno() |
1455 |
PROTOTYPE: |
1456 |
CODE: |
1457 |
RETVAL = respipe [0]; |
1458 |
OUTPUT: |
1459 |
RETVAL |
1460 |
|
1461 |
int |
1462 |
poll_cb(...) |
1463 |
PROTOTYPE: |
1464 |
CODE: |
1465 |
RETVAL = poll_cb (0); |
1466 |
OUTPUT: |
1467 |
RETVAL |
1468 |
|
1469 |
int |
1470 |
poll_some(int max = 0) |
1471 |
PROTOTYPE: $ |
1472 |
CODE: |
1473 |
RETVAL = poll_cb (max); |
1474 |
OUTPUT: |
1475 |
RETVAL |
1476 |
|
1477 |
void |
1478 |
poll_wait() |
1479 |
PROTOTYPE: |
1480 |
CODE: |
1481 |
if (nreqs) |
1482 |
poll_wait (); |
1483 |
|
1484 |
int |
1485 |
nreqs() |
1486 |
PROTOTYPE: |
1487 |
CODE: |
1488 |
RETVAL = nreqs; |
1489 |
OUTPUT: |
1490 |
RETVAL |
1491 |
|
1492 |
int |
1493 |
nready() |
1494 |
PROTOTYPE: |
1495 |
CODE: |
1496 |
if (WORDREAD_UNSAFE) LOCK (reqlock); |
1497 |
RETVAL = nready; |
1498 |
if (WORDREAD_UNSAFE) UNLOCK (reqlock); |
1499 |
OUTPUT: |
1500 |
RETVAL |
1501 |
|
1502 |
int |
1503 |
npending() |
1504 |
PROTOTYPE: |
1505 |
CODE: |
1506 |
if (WORDREAD_UNSAFE) LOCK (reslock); |
1507 |
RETVAL = npending; |
1508 |
if (WORDREAD_UNSAFE) UNLOCK (reslock); |
1509 |
OUTPUT: |
1510 |
RETVAL |
1511 |
|
1512 |
PROTOTYPES: DISABLE |
1513 |
|
1514 |
MODULE = IO::AIO PACKAGE = IO::AIO::REQ |
1515 |
|
1516 |
void |
1517 |
cancel (aio_req_ornot req) |
1518 |
CODE: |
1519 |
req_cancel (req); |
1520 |
|
1521 |
void |
1522 |
cb (aio_req_ornot req, SV *callback=&PL_sv_undef) |
1523 |
CODE: |
1524 |
SvREFCNT_dec (req->callback); |
1525 |
req->callback = newSVsv (callback); |
1526 |
|
1527 |
MODULE = IO::AIO PACKAGE = IO::AIO::GRP |
1528 |
|
1529 |
void |
1530 |
add (aio_req grp, ...) |
1531 |
PPCODE: |
1532 |
{ |
1533 |
int i; |
1534 |
aio_req req; |
1535 |
|
1536 |
if (grp->fd == 2) |
1537 |
croak ("cannot add requests to IO::AIO::GRP after the group finished"); |
1538 |
|
1539 |
for (i = 1; i < items; ++i ) |
1540 |
{ |
1541 |
if (GIMME_V != G_VOID) |
1542 |
XPUSHs (sv_2mortal (newSVsv (ST (i)))); |
1543 |
|
1544 |
req = SvAIO_REQ (ST (i)); |
1545 |
|
1546 |
if (req) |
1547 |
{ |
1548 |
++grp->length; |
1549 |
req->grp = grp; |
1550 |
|
1551 |
req->grp_prev = 0; |
1552 |
req->grp_next = grp->grp_first; |
1553 |
|
1554 |
if (grp->grp_first) |
1555 |
grp->grp_first->grp_prev = req; |
1556 |
|
1557 |
grp->grp_first = req; |
1558 |
} |
1559 |
} |
1560 |
} |
1561 |
|
1562 |
void |
1563 |
cancel_subs (aio_req_ornot req) |
1564 |
CODE: |
1565 |
req_cancel_subs (req); |
1566 |
|
1567 |
void |
1568 |
result (aio_req grp, ...) |
1569 |
CODE: |
1570 |
{ |
1571 |
int i; |
1572 |
AV *av; |
1573 |
|
1574 |
grp->errorno = errno; |
1575 |
|
1576 |
av = newAV (); |
1577 |
|
1578 |
for (i = 1; i < items; ++i ) |
1579 |
av_push (av, newSVsv (ST (i))); |
1580 |
|
1581 |
SvREFCNT_dec (grp->data); |
1582 |
grp->data = (SV *)av; |
1583 |
} |
1584 |
|
1585 |
void |
1586 |
errno (aio_req grp, int errorno = errno) |
1587 |
CODE: |
1588 |
grp->errorno = errorno; |
1589 |
|
1590 |
void |
1591 |
limit (aio_req grp, int limit) |
1592 |
CODE: |
1593 |
grp->fd2 = limit; |
1594 |
aio_grp_feed (grp); |
1595 |
|
1596 |
void |
1597 |
feed (aio_req grp, SV *callback=&PL_sv_undef) |
1598 |
CODE: |
1599 |
{ |
1600 |
SvREFCNT_dec (grp->fh2); |
1601 |
grp->fh2 = newSVsv (callback); |
1602 |
|
1603 |
if (grp->fd2 <= 0) |
1604 |
grp->fd2 = 2; |
1605 |
|
1606 |
aio_grp_feed (grp); |
1607 |
} |
1608 |
|