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/cvs/IO-AIO/AIO.xs
Revision: 1.250
Committed: Fri Sep 22 05:20:39 2017 UTC (6 years, 7 months ago) by root
Branch: MAIN
Changes since 1.249: +79 -1 lines
Log Message:
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File Contents

# Content
1 #include "libeio/xthread.h"
2
3 #include <errno.h>
4
5 #include "EXTERN.h"
6 #include "perl.h"
7 #include "XSUB.h"
8
9 #include "schmorp.h"
10
11 #include <stddef.h>
12 #include <stdlib.h>
13 #include <errno.h>
14 #include <sys/types.h>
15 #include <sys/stat.h>
16 #include <limits.h>
17 #include <fcntl.h>
18 #include <sched.h>
19
20 #if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
21 # include <sys/mman.h>
22 #endif
23
24 /* the incompetent fool that created musl keeps __linux__, refuses
25 * to implement any linux standard apis, and also has no way to test
26 * for his broken iplementation. don't complain to me if this fails
27 * for you.
28 */
29 #if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
30 # include <linux/fs.h>
31 # ifdef FS_IOC_FIEMAP
32 # include <linux/types.h>
33 # include <linux/fiemap.h>
34 # define HAVE_FIEMAP 1
35 # endif
36 #endif
37
38 /* perl namespace pollution */
39 #undef VERSION
40
41 /* perl stupidly overrides readdir and maybe others */
42 /* with thread-unsafe versions, imagine that :( */
43 #undef readdir
44 #undef opendir
45 #undef closedir
46
47 #ifdef _WIN32
48
49 // perl overrides all those nice libc functions
50
51 #undef malloc
52 #undef free
53 #undef open
54 #undef read
55 #undef write
56 #undef send
57 #undef recv
58 #undef stat
59 #undef lstat
60 #undef fstat
61 #undef truncate
62 #undef ftruncate
63 #undef open
64 #undef link
65 #undef close
66 #undef unlink
67 #undef mkdir
68 #undef rmdir
69 #undef rename
70 #undef lseek
71 #undef opendir
72 #undef readdir
73 #undef closedir
74 #undef chmod
75 #undef fchmod
76 #undef dup
77 #undef dup2
78 #undef abort
79 #undef pipe
80
81 #define EIO_STRUCT_STAT struct _stati64
82 #define EIO_STRUCT_STATI64
83
84 #else
85
86 #include <sys/time.h>
87 #include <sys/select.h>
88 #include <unistd.h>
89 #include <utime.h>
90 #include <signal.h>
91
92 #define EIO_STRUCT_STAT Stat_t
93
94 #endif
95
96 /*****************************************************************************/
97
98 #if __GNUC__ >= 3
99 # define expect(expr,value) __builtin_expect ((expr),(value))
100 #else
101 # define expect(expr,value) (expr)
102 #endif
103
104 #define expect_false(expr) expect ((expr) != 0, 0)
105 #define expect_true(expr) expect ((expr) != 0, 1)
106
107 /*****************************************************************************/
108
109 #include "libeio/config.h"
110
111 #if HAVE_RLIMITS
112 #include <sys/time.h>
113 #include <sys/resource.h>
114 #endif
115
116 typedef SV SV8; /* byte-sv, used for argument-checking */
117 typedef int aio_rfd; /* read file desriptor */
118 typedef int aio_wfd; /* write file descriptor */
119
120 static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
121
122 #define EIO_REQ_MEMBERS \
123 SV *callback; \
124 SV *sv1, *sv2; \
125 SV *sv3, *sv4; \
126 STRLEN stroffset; \
127 SV *self;
128
129 #define EIO_NO_WRAPPERS 1
130
131 #include "libeio/eio.h"
132
133 static int req_invoke (eio_req *req);
134 #define EIO_FINISH(req) req_invoke (req)
135 static void req_destroy (eio_req *grp);
136 #define EIO_DESTROY(req) req_destroy (req)
137
138 #include "libeio/eio.c"
139
140 #if !HAVE_POSIX_FADVISE
141 # define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
142 #endif
143
144 #if !HAVE_POSIX_MADVISE
145 # define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
146 #endif
147
148 #ifndef MAP_ANONYMOUS
149 # ifdef MAP_ANON
150 # define MAP_ANONYMOUS MAP_ANON
151 # else
152 # define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
153 # endif
154 #endif
155
156 /* defines all sorts of constants to 0 unless they are already defined */
157 /* also provides const_iv_ and const_niv_ macros for them */
158 #include "def0.h"
159
160 #ifndef makedev
161 # define makedev(maj,min) (((maj) << 8) | (min))
162 #endif
163 #ifndef major
164 # define major(dev) ((dev) >> 8)
165 #endif
166 #ifndef minor
167 # define minor(dev) ((dev) & 0xff)
168 #endif
169
170 #if PAGESIZE <= 0
171 # define PAGESIZE sysconf (_SC_PAGESIZE)
172 #endif
173
174 /*****************************************************************************/
175
176 static void
177 fiemap (eio_req *req)
178 {
179 req->result = -1;
180
181 #if HAVE_FIEMAP
182 /* assume some c99 */
183 struct fiemap *fiemap = 0;
184 size_t end_offset;
185 int count = req->int3;
186
187 req->flags |= EIO_FLAG_PTR1_FREE;
188
189 /* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
190 /* increase in 3.5kb steps */
191 if (count < 0)
192 count = 8;
193
194 fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
195 errno = ENOMEM;
196 if (!fiemap)
197 return;
198
199 req->ptr1 = fiemap;
200
201 fiemap->fm_start = req->offs;
202 fiemap->fm_length = req->size;
203 fiemap->fm_flags = req->int2;
204 fiemap->fm_extent_count = count;
205
206 if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
207 return;
208
209 if (req->int3 >= 0 /* not autosizing */
210 || !fiemap->fm_mapped_extents /* no more extents */
211 || fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
212 goto done;
213
214 /* else we have to loop -
215 * it would be tempting (actually I tried that first) to just query the
216 * number of extents needed, but linux often feels like not returning all
217 * extents, without telling us it left any out. this complicates
218 * this quite a bit.
219 */
220
221 end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
222
223 for (;;)
224 {
225 /* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
226 char scratch[3072];
227 struct fiemap *incmap = (struct fiemap *)scratch;
228
229 incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
230 + fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
231 incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
232 incmap->fm_flags = fiemap->fm_flags;
233 incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
234
235 if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
236 return;
237
238 if (!incmap->fm_mapped_extents)
239 goto done;
240
241 count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
242 fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
243 errno = ENOMEM;
244 if (!fiemap)
245 return;
246
247 req->ptr1 = fiemap;
248
249 for (count = 0; count < incmap->fm_mapped_extents; ++count)
250 {
251 struct fiemap_extent *e = incmap->fm_extents + count;
252
253 if (e->fe_logical + e->fe_length >= end_offset)
254 goto done;
255
256 fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
257
258 if (e->fe_flags & FIEMAP_EXTENT_LAST)
259 goto done;
260
261 }
262 }
263
264 done:
265 req->result = 0;
266
267 #else
268 errno = ENOSYS;
269 #endif
270 }
271
272 /*****************************************************************************/
273
274 enum {
275 FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
276 };
277
278 typedef eio_req *aio_req;
279 typedef eio_req *aio_req_ornot;
280 typedef eio_wd aio_wd;
281
282 static SV *on_next_submit;
283 static int next_pri = EIO_PRI_DEFAULT;
284 static int max_outstanding;
285
286 static s_epipe respipe;
287
288 static void req_destroy (aio_req req);
289 static void req_cancel (aio_req req);
290
291 static void
292 want_poll (void)
293 {
294 /* write a dummy byte to the pipe so fh becomes ready */
295 s_epipe_signal (&respipe);
296 }
297
298 static void
299 done_poll (void)
300 {
301 /* read any signals sent by the worker threads */
302 s_epipe_drain (&respipe);
303 }
304
305 /* must be called at most once */
306 static SV *
307 req_sv (aio_req req, HV *stash)
308 {
309 if (!req->self)
310 {
311 req->self = (SV *)newHV ();
312 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
313 }
314
315 return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
316 }
317
318 static SV *
319 newSVaio_wd (aio_wd wd)
320 {
321 return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
322 }
323
324 static aio_req
325 SvAIO_REQ (SV *sv)
326 {
327 MAGIC *mg;
328
329 if (!SvROK (sv)
330 /* for speed reasons, we do not verify that SvROK actually has a stash ptr */
331 || (SvSTASH (SvRV (sv)) != aio_grp_stash
332 && SvSTASH (SvRV (sv)) != aio_req_stash
333 && !sv_derived_from (sv, "IO::AIO::REQ")))
334 croak ("object of class IO::AIO::REQ expected");
335
336 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
337
338 return mg ? (aio_req)mg->mg_ptr : 0;
339 }
340
341 static aio_wd
342 SvAIO_WD (SV *sv)
343 {
344 if (!SvROK (sv)
345 || SvTYPE (SvRV (sv)) != SVt_PVMG
346 || SvSTASH (SvRV (sv)) != aio_wd_stash)
347 croak ("IO::AIO: expected a working directory object as returned by aio_wd");
348
349 return (aio_wd)(long)SvIVX (SvRV (sv));
350 }
351
352 static SV *
353 newmortalFH (int fd, int flags)
354 {
355 if (fd < 0)
356 return &PL_sv_undef;
357
358 GV *gv = (GV *)sv_newmortal ();
359 char sym[64];
360 int symlen;
361
362 symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
363 gv_init (gv, aio_stash, sym, symlen, 0);
364
365 symlen = snprintf (
366 sym,
367 sizeof (sym),
368 "%s&=%d",
369 flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
370 fd
371 );
372
373 return do_open (gv, sym, symlen, 0, 0, 0, 0)
374 ? (SV *)gv : &PL_sv_undef;
375 }
376
377 static void
378 aio_grp_feed (aio_req grp)
379 {
380 if (grp->sv2 && SvOK (grp->sv2))
381 {
382 dSP;
383
384 ENTER;
385 SAVETMPS;
386 PUSHMARK (SP);
387 XPUSHs (req_sv (grp, aio_grp_stash));
388 PUTBACK;
389 call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
390 SPAGAIN;
391 FREETMPS;
392 LEAVE;
393 }
394 }
395
396 static void
397 req_submit (eio_req *req)
398 {
399 eio_submit (req);
400
401 if (expect_false (on_next_submit))
402 {
403 dSP;
404 SV *cb = sv_2mortal (on_next_submit);
405
406 on_next_submit = 0;
407
408 PUSHMARK (SP);
409 PUTBACK;
410 call_sv (cb, G_DISCARD | G_EVAL);
411 }
412 }
413
414 static int
415 req_invoke (eio_req *req)
416 {
417 if (req->flags & FLAG_SV2_RO_OFF)
418 SvREADONLY_off (req->sv2);
419
420 if (!EIO_CANCELLED (req) && req->callback)
421 {
422 dSP;
423 static SV *sv_result_cache; /* caches the result integer SV */
424 SV *sv_result;
425
426 ENTER;
427 SAVETMPS;
428 PUSHMARK (SP);
429 EXTEND (SP, 1);
430
431 /* do not recreate the result IV from scratch each time */
432 if (expect_true (sv_result_cache))
433 {
434 sv_result = sv_result_cache; sv_result_cache = 0;
435 SvIV_set (sv_result, req->result);
436 SvIOK_only (sv_result);
437 }
438 else
439 {
440 sv_result = newSViv (req->result);
441 SvREADONLY_on (sv_result);
442 }
443
444 switch (req->type)
445 {
446 case EIO_WD_OPEN:
447 PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
448 break;
449
450 case EIO_READDIR:
451 {
452 SV *rv = &PL_sv_undef;
453
454 if (req->result >= 0)
455 {
456 int i;
457 char *names = (char *)req->ptr2;
458 eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
459 AV *av = newAV ();
460
461 av_extend (av, req->result - 1);
462
463 for (i = 0; i < req->result; ++i)
464 {
465 if (req->int1 & EIO_READDIR_DENTS)
466 {
467 SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
468
469 if (req->int1 & EIO_READDIR_CUSTOM2)
470 {
471 static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
472 AV *avent = newAV ();
473
474 av_extend (avent, 2);
475
476 if (!sv_type [ent->type])
477 {
478 sv_type [ent->type] = newSViv (ent->type);
479 SvREADONLY_on (sv_type [ent->type]);
480 }
481
482 av_store (avent, 0, namesv);
483 av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
484 av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
485
486 av_store (av, i, newRV_noinc ((SV *)avent));
487 }
488 else
489 av_store (av, i, namesv);
490
491 ++ent;
492 }
493 else
494 {
495 SV *name = newSVpv (names, 0);
496 av_store (av, i, name);
497 names += SvCUR (name) + 1;
498 }
499 }
500
501 rv = sv_2mortal (newRV_noinc ((SV *)av));
502 }
503
504 PUSHs (rv);
505
506 if (req->int1 & EIO_READDIR_CUSTOM1)
507 XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
508 }
509 break;
510
511 case EIO_OPEN:
512 PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
513 break;
514
515 case EIO_STATVFS:
516 case EIO_FSTATVFS:
517 {
518 SV *rv = &PL_sv_undef;
519
520 #ifndef _WIN32
521 if (req->result >= 0)
522 {
523 EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
524 HV *hv = newHV ();
525 /* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
526 * chooses to make it a struct.
527 */
528 unsigned long fsid = 0;
529 memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
530
531 rv = sv_2mortal (newRV_noinc ((SV *)hv));
532
533 hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
534 hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
535 hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
536 hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
537 hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
538 hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
539 hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
540 hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
541 hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
542 hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
543 hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
544 }
545 #endif
546
547 PUSHs (rv);
548 }
549
550 break;
551
552 case EIO_GROUP:
553 req->int1 = 2; /* mark group as finished */
554
555 if (req->sv1)
556 {
557 int i;
558 AV *av = (AV *)req->sv1;
559
560 EXTEND (SP, AvFILL (av) + 1);
561 for (i = 0; i <= AvFILL (av); ++i)
562 PUSHs (*av_fetch (av, i, 0));
563 }
564 break;
565
566 case EIO_NOP:
567 case EIO_BUSY:
568 break;
569
570 case EIO_READLINK:
571 case EIO_REALPATH:
572 if (req->result > 0)
573 PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
574 break;
575
576 case EIO_STAT:
577 case EIO_LSTAT:
578 case EIO_FSTAT:
579 PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
580
581 if (!(PL_laststatval = req->result))
582 /* if compilation fails here then perl's Stat_t is not struct _stati64 */
583 PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
584
585 PUSHs (sv_result);
586 break;
587
588 case EIO_SEEK:
589 PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
590 break;
591
592 case EIO_READ:
593 {
594 SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
595 *SvEND (req->sv2) = 0;
596 SvPOK_only (req->sv2);
597 SvSETMAGIC (req->sv2);
598 PUSHs (sv_result);
599 }
600 break;
601
602 case EIO_CUSTOM:
603 if (req->feed == fiemap)
604 {
605 #if HAVE_FIEMAP
606 if (!req->result)
607 {
608 struct fiemap *fiemap = (struct fiemap *)req->ptr1;
609
610 if (fiemap->fm_extent_count)
611 {
612 AV *av = newAV ();
613 int i;
614
615 while (fiemap->fm_mapped_extents)
616 {
617 struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
618 AV *ext_av = newAV ();
619
620 av_store (ext_av, 3, newSVuv (extent->fe_flags));
621 av_store (ext_av, 2, newSVval64 (extent->fe_length));
622 av_store (ext_av, 1, newSVval64 (extent->fe_physical));
623 av_store (ext_av, 0, newSVval64 (extent->fe_logical));
624
625 av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
626 }
627
628 PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
629 }
630 else
631 {
632 SvIV_set (sv_result, fiemap->fm_mapped_extents);
633 PUSHs (sv_result);
634 }
635 }
636 #endif
637 }
638 else
639 PUSHs (sv_result);
640 break;
641
642 case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
643 if (req->result > 0)
644 SvIV_set (sv_result, 0);
645 /* FALLTHROUGH */
646
647 default:
648 PUSHs (sv_result);
649 break;
650 }
651
652 errno = req->errorno;
653
654 PUTBACK;
655 call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
656 SPAGAIN;
657
658 if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
659 SvREFCNT_dec (sv_result);
660 else
661 sv_result_cache = sv_result;
662
663 FREETMPS;
664 LEAVE;
665
666 PUTBACK;
667 }
668
669 return !!SvTRUE (ERRSV);
670 }
671
672 static void
673 req_destroy (aio_req req)
674 {
675 if (req->self)
676 {
677 sv_unmagic (req->self, PERL_MAGIC_ext);
678 SvREFCNT_dec (req->self);
679 }
680
681 SvREFCNT_dec (req->sv1);
682 SvREFCNT_dec (req->sv2);
683 SvREFCNT_dec (req->sv3);
684 SvREFCNT_dec (req->sv4);
685 SvREFCNT_dec (req->callback);
686
687 free (req);
688 }
689
690 static void
691 req_cancel_subs (aio_req grp)
692 {
693 if (grp->type != EIO_GROUP)
694 return;
695
696 SvREFCNT_dec (grp->sv2);
697 grp->sv2 = 0;
698
699 eio_grp_cancel (grp);
700 }
701
702 static void ecb_cold
703 create_respipe (void)
704 {
705 if (s_epipe_renew (&respipe))
706 croak ("IO::AIO: unable to initialize result pipe");
707 }
708
709 static void
710 poll_wait (void)
711 {
712 while (eio_nreqs ())
713 {
714 int size;
715
716 X_LOCK (EIO_POOL->reslock);
717 size = EIO_POOL->res_queue.size;
718 X_UNLOCK (EIO_POOL->reslock);
719
720 if (size)
721 return;
722
723 etp_maybe_start_thread (EIO_POOL);
724
725 s_epipe_wait (&respipe);
726 }
727 }
728
729 static int
730 poll_cb (void)
731 {
732 for (;;)
733 {
734 int res = eio_poll ();
735
736 if (res > 0)
737 croak (0);
738
739 if (!max_outstanding || max_outstanding > eio_nreqs ())
740 return res;
741
742 poll_wait ();
743 }
744 }
745
746 static void ecb_cold
747 reinit (void)
748 {
749 create_respipe ();
750
751 if (eio_init (want_poll, done_poll) < 0)
752 croak ("IO::AIO: unable to initialise eio library");
753 }
754
755 /*****************************************************************************/
756
757 #if !_POSIX_MAPPED_FILES
758 # define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
759 # define munmap(addr,length) EIO_ENOSYS ()
760 #endif
761
762 #if !_POSIX_MEMORY_PROTECTION
763 # define mprotect(addr,len,prot) EIO_ENOSYS ()
764 #endif
765
766 #define MMAP_MAGIC PERL_MAGIC_ext
767
768 static int ecb_cold
769 mmap_free (pTHX_ SV *sv, MAGIC *mg)
770 {
771 int old_errno = errno;
772 munmap (mg->mg_ptr, (size_t)mg->mg_obj);
773 errno = old_errno;
774
775 mg->mg_obj = 0; /* just in case */
776
777 SvREADONLY_off (sv);
778
779 if (SvPVX (sv) != mg->mg_ptr)
780 croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
781
782 SvCUR_set (sv, 0);
783 SvPVX (sv) = 0;
784 SvOK_off (sv);
785
786 return 0;
787 }
788
789 static MGVTBL mmap_vtbl = {
790 0, 0, 0, 0, mmap_free
791 };
792
793 /*****************************************************************************/
794
795 static SV *
796 get_cb (SV *cb_sv)
797 {
798 SvGETMAGIC (cb_sv);
799 return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
800 }
801
802 static aio_req ecb_noinline
803 dreq (SV *callback)
804 {
805 SV *cb_cv;
806 aio_req req;
807 int req_pri = next_pri;
808 next_pri = EIO_PRI_DEFAULT;
809
810 cb_cv = get_cb (callback);
811
812 req = calloc (sizeof (*req), 1);
813 if (!req)
814 croak ("out of memory during eio_req allocation");
815
816 req->callback = SvREFCNT_inc (cb_cv);
817 req->pri = req_pri;
818
819 return req;
820 }
821
822 #define dREQ \
823 aio_req req = dreq (callback); \
824
825 #define REQ_SEND \
826 PUTBACK; \
827 req_submit (req); \
828 SPAGAIN; \
829 \
830 if (GIMME_V != G_VOID) \
831 XPUSHs (req_sv (req, aio_req_stash));
832
833 ecb_inline void
834 req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
835 {
836 if (expect_false (SvROK (path)))
837 {
838 SV *rv = SvRV (path);
839 SV *wdob;
840
841 if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
842 {
843 path = AvARRAY (rv)[1];
844 wdob = AvARRAY (rv)[0];
845
846 if (SvOK (wdob))
847 {
848 *wd = SvAIO_WD (wdob);
849 *wdsv = SvREFCNT_inc_NN (SvRV (wdob));
850 }
851 else
852 *wd = EIO_INVALID_WD;
853 }
854 else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
855 {
856 *wd = (aio_wd)(long)SvIVX (rv);
857 *wdsv = SvREFCNT_inc_NN (rv);
858 *ptr = ".";
859 return; /* path set to "." */
860 }
861 else
862 croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
863 }
864
865 *pathsv = newSVsv (path);
866 *ptr = SvPVbyte_nolen (*pathsv);
867 }
868
869 static void ecb_noinline
870 req_set_path1 (aio_req req, SV *path)
871 {
872 req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
873 }
874
875 static void ecb_noinline
876 req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
877 {
878 SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
879
880 switch (SvTYPE (rv))
881 {
882 case SVt_PVIO:
883 case SVt_PVLV:
884 case SVt_PVGV:
885 req->type = type_fh;
886 req->sv1 = newSVsv (fh_or_path);
887 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
888 break;
889
890 default:
891 req->type = type_path;
892 req_set_path1 (req, fh_or_path);
893 break;
894 }
895 }
896
897 XS(boot_IO__AIO) ecb_cold;
898
899 MODULE = IO::AIO PACKAGE = IO::AIO
900
901 PROTOTYPES: ENABLE
902
903 BOOT:
904 {
905 static const struct {
906 const char *name;
907 IV iv;
908 } *civ, const_iv[] = {
909 # define const_niv(name, value) { # name, (IV) value },
910 # define const_iv(name) { # name, (IV) name },
911 # define const_eio(name) { # name, (IV) EIO_ ## name },
912
913 /* you have to re-run ./gendef0 after adding/removing any constants here */
914 /* the first block can be undef if missing */
915 const_iv (ENOSYS)
916 const_iv (EXDEV)
917 const_iv (EBADR)
918
919 /* for lseek */
920 const_iv (SEEK_DATA)
921 const_iv (SEEK_HOLE)
922
923 const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
924 const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
925 const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
926 const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
927 const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
928 const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
929
930 const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
931 const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
932 const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
933 const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
934 const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
935
936 /* the second block will be 0 when missing */
937 const_iv (O_RDONLY)
938 const_iv (O_WRONLY)
939 const_iv (O_RDWR)
940 const_iv (O_CREAT)
941 const_iv (O_TRUNC)
942 const_iv (O_EXCL)
943 const_iv (O_APPEND)
944
945 const_iv (O_ASYNC)
946 const_iv (O_DIRECT)
947 const_iv (O_NOATIME)
948
949 const_iv (O_CLOEXEC)
950 const_iv (O_NOCTTY)
951 const_iv (O_NOFOLLOW)
952 const_iv (O_NONBLOCK)
953 const_iv (O_EXEC)
954 const_iv (O_SEARCH)
955 const_iv (O_DIRECTORY)
956 const_iv (O_DSYNC)
957 const_iv (O_RSYNC)
958 const_iv (O_SYNC)
959 const_iv (O_PATH)
960 const_iv (O_TMPFILE)
961 const_iv (O_TTY_INIT)
962
963 const_iv (S_IFIFO)
964 const_iv (S_IFCHR)
965 const_iv (S_IFBLK)
966 const_iv (S_IFLNK)
967 const_iv (S_IFREG)
968 const_iv (S_IFDIR)
969 const_iv (S_IFWHT)
970 const_iv (S_IFSOCK)
971 const_iv (S_IFMT)
972
973 const_iv (ST_RDONLY)
974 const_iv (ST_NOSUID)
975 const_iv (ST_NODEV)
976 const_iv (ST_NOEXEC)
977 const_iv (ST_SYNCHRONOUS)
978 const_iv (ST_MANDLOCK)
979 const_iv (ST_WRITE)
980 const_iv (ST_APPEND)
981 const_iv (ST_IMMUTABLE)
982 const_iv (ST_NOATIME)
983 const_iv (ST_NODIRATIME)
984 const_iv (ST_RELATIME)
985
986 const_iv (PROT_NONE)
987 const_iv (PROT_EXEC)
988 const_iv (PROT_READ)
989 const_iv (PROT_WRITE)
990
991 const_iv (MAP_PRIVATE)
992 const_iv (MAP_SHARED)
993 const_iv (MAP_FIXED)
994 const_iv (MAP_ANONYMOUS)
995
996 /* linuxish */
997 const_iv (MAP_LOCKED)
998 const_iv (MAP_NORESERVE)
999 const_iv (MAP_POPULATE)
1000 const_iv (MAP_NONBLOCK)
1001 const_iv (MAP_GROWSDOWN)
1002 const_iv (MAP_32BIT)
1003 const_iv (MAP_HUGETLB)
1004 const_iv (MAP_STACK)
1005
1006 const_iv (F_DUPFD_CLOEXEC)
1007
1008 const_iv (F_OFD_GETLK)
1009 const_iv (F_OFD_SETLK)
1010 const_iv (F_OFD_GETLKW)
1011
1012 const_iv (FIFREEZE)
1013 const_iv (FITHAW)
1014 const_iv (FITRIM)
1015 const_iv (FICLONE)
1016 const_iv (FICLONERANGE)
1017 const_iv (FIDEDUPERANGE)
1018
1019 const_iv (FS_IOC_GETFLAGS)
1020 const_iv (FS_IOC_SETFLAGS)
1021 const_iv (FS_IOC_GETVERSION)
1022 const_iv (FS_IOC_SETVERSION)
1023 const_iv (FS_IOC_FIEMAP)
1024 const_iv (FS_IOC_FSGETXATTR)
1025 const_iv (FS_IOC_FSSETXATTR)
1026 const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
1027 const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
1028 const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
1029
1030 const_iv (FS_KEY_DESCRIPTOR_SIZE)
1031
1032 const_iv (FS_SECRM_FL)
1033 const_iv (FS_UNRM_FL)
1034 const_iv (FS_COMPR_FL)
1035 const_iv (FS_SYNC_FL)
1036 const_iv (FS_IMMUTABLE_FL)
1037 const_iv (FS_APPEND_FL)
1038 const_iv (FS_NODUMP_FL)
1039 const_iv (FS_NOATIME_FL)
1040 const_iv (FS_DIRTY_FL)
1041 const_iv (FS_COMPRBLK_FL)
1042 const_iv (FS_NOCOMP_FL)
1043 const_iv (FS_ENCRYPT_FL)
1044 const_iv (FS_BTREE_FL)
1045 const_iv (FS_INDEX_FL)
1046 const_iv (FS_JOURNAL_DATA_FL)
1047 const_iv (FS_NOTAIL_FL)
1048 const_iv (FS_DIRSYNC_FL)
1049 const_iv (FS_TOPDIR_FL)
1050 const_iv (FS_FL_USER_MODIFIABLE)
1051
1052 const_iv (FS_XFLAG_REALTIME)
1053 const_iv (FS_XFLAG_PREALLOC)
1054 const_iv (FS_XFLAG_IMMUTABLE)
1055 const_iv (FS_XFLAG_APPEND)
1056 const_iv (FS_XFLAG_SYNC)
1057 const_iv (FS_XFLAG_NOATIME)
1058 const_iv (FS_XFLAG_NODUMP)
1059 const_iv (FS_XFLAG_RTINHERIT)
1060 const_iv (FS_XFLAG_PROJINHERIT)
1061 const_iv (FS_XFLAG_NOSYMLINKS)
1062 const_iv (FS_XFLAG_EXTSIZE)
1063 const_iv (FS_XFLAG_EXTSZINHERIT)
1064 const_iv (FS_XFLAG_NODEFRAG)
1065 const_iv (FS_XFLAG_FILESTREAM)
1066 const_iv (FS_XFLAG_DAX)
1067 const_iv (FS_XFLAG_HASATTR)
1068
1069 const_iv (FIEMAP_FLAG_SYNC)
1070 const_iv (FIEMAP_FLAG_XATTR)
1071 const_iv (FIEMAP_FLAGS_COMPAT)
1072 const_iv (FIEMAP_EXTENT_LAST)
1073 const_iv (FIEMAP_EXTENT_UNKNOWN)
1074 const_iv (FIEMAP_EXTENT_DELALLOC)
1075 const_iv (FIEMAP_EXTENT_ENCODED)
1076 const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
1077 const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
1078 const_iv (FIEMAP_EXTENT_DATA_INLINE)
1079 const_iv (FIEMAP_EXTENT_DATA_TAIL)
1080 const_iv (FIEMAP_EXTENT_UNWRITTEN)
1081 const_iv (FIEMAP_EXTENT_MERGED)
1082 const_iv (FIEMAP_EXTENT_SHARED)
1083
1084 const_iv (SPLICE_F_MOVE)
1085 const_iv (SPLICE_F_NONBLOCK)
1086 const_iv (SPLICE_F_MORE)
1087 const_iv (SPLICE_F_GIFT)
1088
1089 /* these are libeio constants, and are independent of gendef0 */
1090 const_eio (SEEK_SET)
1091 const_eio (SEEK_CUR)
1092 const_eio (SEEK_END)
1093
1094 const_eio (MCL_FUTURE)
1095 const_eio (MCL_CURRENT)
1096
1097 const_eio (MS_ASYNC)
1098 const_eio (MS_INVALIDATE)
1099 const_eio (MS_SYNC)
1100
1101 const_eio (MT_MODIFY)
1102
1103 const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
1104 const_eio (SYNC_FILE_RANGE_WRITE)
1105 const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
1106
1107 const_eio (FALLOC_FL_KEEP_SIZE)
1108 const_eio (FALLOC_FL_PUNCH_HOLE)
1109 const_eio (FALLOC_FL_COLLAPSE_RANGE)
1110 const_eio (FALLOC_FL_ZERO_RANGE)
1111 const_eio (FALLOC_FL_INSERT_RANGE)
1112 const_eio (FALLOC_FL_UNSHARE_RANGE)
1113
1114 const_eio (RENAME_NOREPLACE)
1115 const_eio (RENAME_EXCHANGE)
1116 const_eio (RENAME_WHITEOUT)
1117
1118 const_eio (READDIR_DENTS)
1119 const_eio (READDIR_DIRS_FIRST)
1120 const_eio (READDIR_STAT_ORDER)
1121 const_eio (READDIR_FOUND_UNKNOWN)
1122
1123 const_eio (DT_UNKNOWN)
1124 const_eio (DT_FIFO)
1125 const_eio (DT_CHR)
1126 const_eio (DT_DIR)
1127 const_eio (DT_BLK)
1128 const_eio (DT_REG)
1129 const_eio (DT_LNK)
1130 const_eio (DT_SOCK)
1131 const_eio (DT_WHT)
1132 };
1133
1134 aio_stash = gv_stashpv ("IO::AIO" , 1);
1135 aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1136 aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1137 aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
1138
1139 for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
1140 newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
1141
1142 newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
1143
1144 reinit ();
1145 }
1146
1147 void
1148 reinit ()
1149 PROTOTYPE:
1150
1151 void
1152 max_poll_reqs (unsigned int nreqs)
1153 PROTOTYPE: $
1154 CODE:
1155 eio_set_max_poll_reqs (nreqs);
1156
1157 void
1158 max_poll_time (double nseconds)
1159 PROTOTYPE: $
1160 CODE:
1161 eio_set_max_poll_time (nseconds);
1162
1163 void
1164 min_parallel (unsigned int nthreads)
1165 PROTOTYPE: $
1166 CODE:
1167 eio_set_min_parallel (nthreads);
1168
1169 void
1170 max_parallel (unsigned int nthreads)
1171 PROTOTYPE: $
1172 CODE:
1173 eio_set_max_parallel (nthreads);
1174
1175 void
1176 max_idle (unsigned int nthreads)
1177 PROTOTYPE: $
1178 CODE:
1179 eio_set_max_idle (nthreads);
1180
1181 void
1182 idle_timeout (unsigned int seconds)
1183 PROTOTYPE: $
1184 CODE:
1185 eio_set_idle_timeout (seconds);
1186
1187 void
1188 max_outstanding (unsigned int maxreqs)
1189 PROTOTYPE: $
1190 CODE:
1191 max_outstanding = maxreqs;
1192
1193 void
1194 aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
1195 PPCODE:
1196 {
1197 dREQ;
1198
1199 req->type = EIO_WD_OPEN;
1200 req_set_path1 (req, pathname);
1201
1202 REQ_SEND;
1203 }
1204
1205 void
1206 aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
1207 PPCODE:
1208 {
1209 dREQ;
1210
1211 req->type = EIO_OPEN;
1212 req_set_path1 (req, pathname);
1213 req->int1 = flags;
1214 req->int2 = mode;
1215
1216 REQ_SEND;
1217 }
1218
1219 void
1220 aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
1221 ALIAS:
1222 aio_fsync = EIO_FSYNC
1223 aio_fdatasync = EIO_FDATASYNC
1224 aio_syncfs = EIO_SYNCFS
1225 PPCODE:
1226 {
1227 int fd = s_fileno_croak (fh, 0);
1228 dREQ;
1229
1230 req->type = ix;
1231 req->sv1 = newSVsv (fh);
1232 req->int1 = fd;
1233
1234 REQ_SEND;
1235 }
1236
1237 void
1238 aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
1239 PPCODE:
1240 {
1241 int fd = s_fileno_croak (fh, 0);
1242 dREQ;
1243
1244 req->type = EIO_SYNC_FILE_RANGE;
1245 req->sv1 = newSVsv (fh);
1246 req->int1 = fd;
1247 req->offs = offset;
1248 req->size = nbytes;
1249 req->int2 = flags;
1250
1251 REQ_SEND;
1252 }
1253
1254 void
1255 aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
1256 PPCODE:
1257 {
1258 int fd = s_fileno_croak (fh, 0);
1259 dREQ;
1260
1261 req->type = EIO_FALLOCATE;
1262 req->sv1 = newSVsv (fh);
1263 req->int1 = fd;
1264 req->int2 = mode;
1265 req->offs = offset;
1266 req->size = len;
1267
1268 REQ_SEND;
1269 }
1270
1271 void
1272 aio_close (SV *fh, SV *callback = &PL_sv_undef)
1273 PPCODE:
1274 {
1275 static int close_fd = -1; /* dummy fd to close fds via dup2 */
1276 int fd = s_fileno_croak (fh, 0);
1277 dREQ;
1278
1279 if (expect_false (close_fd < 0))
1280 {
1281 int pipefd [2];
1282
1283 if (
1284 #ifdef _WIN32
1285 _pipe (pipefd, 1, _O_BINARY) < 0
1286 #else
1287 pipe (pipefd) < 0
1288 || fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
1289 #endif
1290 || close (pipefd [1]) < 0
1291 )
1292 abort (); /*D*/
1293
1294 close_fd = pipefd [0];
1295 }
1296
1297 req->type = EIO_DUP2;
1298 req->int1 = close_fd;
1299 req->sv2 = newSVsv (fh);
1300 req->int2 = fd;
1301
1302 REQ_SEND;
1303 }
1304
1305 void
1306 aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
1307 PPCODE:
1308 {
1309 int fd = s_fileno_croak (fh, 0);
1310 dREQ;
1311
1312 req->type = EIO_SEEK;
1313 req->sv1 = newSVsv (fh);
1314 req->int1 = fd;
1315 req->offs = SvVAL64 (offset);
1316 req->int2 = whence;
1317
1318 REQ_SEND;
1319 }
1320
1321 void
1322 aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
1323 ALIAS:
1324 aio_read = EIO_READ
1325 aio_write = EIO_WRITE
1326 PPCODE:
1327 {
1328 STRLEN svlen;
1329 int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1330 char *svptr = SvPVbyte (data, svlen);
1331 UV len = SvUV (length);
1332
1333 if (dataoffset < 0)
1334 dataoffset += svlen;
1335
1336 if (dataoffset < 0 || dataoffset > svlen)
1337 croak ("dataoffset outside of data scalar");
1338
1339 if (ix == EIO_WRITE)
1340 {
1341 /* write: check length and adjust. */
1342 if (!SvOK (length) || len + dataoffset > svlen)
1343 len = svlen - dataoffset;
1344 }
1345 else
1346 {
1347 /* read: check type and grow scalar as necessary */
1348 if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1349 svptr = sv_grow (data, len + dataoffset + 1);
1350 else if (SvCUR (data) < len + dataoffset)
1351 croak ("length + dataoffset outside of scalar, and cannot grow");
1352 }
1353
1354 {
1355 dREQ;
1356
1357 req->type = ix;
1358 req->sv1 = newSVsv (fh);
1359 req->int1 = fd;
1360 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1361 req->size = len;
1362 req->sv2 = SvREFCNT_inc (data);
1363 req->ptr2 = (char *)svptr + dataoffset;
1364 req->stroffset = dataoffset;
1365
1366 if (!SvREADONLY (data))
1367 {
1368 SvREADONLY_on (data);
1369 req->flags |= FLAG_SV2_RO_OFF;
1370 }
1371
1372 REQ_SEND;
1373 }
1374 }
1375
1376 void
1377 aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
1378 ALIAS:
1379 aio_ioctl = EIO_IOCTL
1380 aio_fcntl = EIO_FCNTL
1381 PPCODE:
1382 {
1383 int fd = s_fileno_croak (fh, 0);
1384 char *svptr;
1385
1386 if (SvPOK (arg) || !SvNIOK (arg))
1387 {
1388 STRLEN svlen;
1389 /* perl uses IOCPARM_LEN for fcntl, so we do, too */
1390 #ifdef IOCPARM_LEN
1391 STRLEN need = IOCPARM_LEN (request);
1392 #else
1393 STRLEN need = 256;
1394 #endif
1395
1396 if (svlen < need)
1397 svptr = SvGROW (arg, need);
1398 }
1399 else
1400 svptr = (char *)SvIV (arg);
1401
1402 {
1403 dREQ;
1404
1405 req->type = ix;
1406 req->sv1 = newSVsv (fh);
1407 req->int1 = fd;
1408 req->int2 = (long)request;
1409 req->sv2 = SvREFCNT_inc (arg);
1410 req->ptr2 = svptr;
1411
1412 REQ_SEND;
1413 }
1414 }
1415
1416 void
1417 aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1418 ALIAS:
1419 aio_readlink = EIO_READLINK
1420 aio_realpath = EIO_REALPATH
1421 PPCODE:
1422 {
1423 dREQ;
1424
1425 req->type = ix;
1426 req_set_path1 (req, pathname);
1427
1428 REQ_SEND;
1429 }
1430
1431 void
1432 aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
1433 PPCODE:
1434 {
1435 int ifd = s_fileno_croak (in_fh , 0);
1436 int ofd = s_fileno_croak (out_fh, 1);
1437 dREQ;
1438
1439 req->type = EIO_SENDFILE;
1440 req->sv1 = newSVsv (out_fh);
1441 req->int1 = ofd;
1442 req->sv2 = newSVsv (in_fh);
1443 req->int2 = ifd;
1444 req->offs = in_offset;
1445 req->size = length;
1446
1447 REQ_SEND;
1448 }
1449
1450 void
1451 aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
1452 PPCODE:
1453 {
1454 int fd = s_fileno_croak (fh, 0);
1455 dREQ;
1456
1457 req->type = EIO_READAHEAD;
1458 req->sv1 = newSVsv (fh);
1459 req->int1 = fd;
1460 req->offs = offset;
1461 req->size = length;
1462
1463 REQ_SEND;
1464 }
1465
1466 void
1467 aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
1468 ALIAS:
1469 aio_stat = EIO_STAT
1470 aio_lstat = EIO_LSTAT
1471 aio_statvfs = EIO_STATVFS
1472 PPCODE:
1473 {
1474 dREQ;
1475
1476 req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1477
1478 REQ_SEND;
1479 }
1480
1481 UV
1482 major (UV dev)
1483 ALIAS:
1484 minor = 1
1485 CODE:
1486 RETVAL = ix ? minor (dev) : major (dev);
1487 OUTPUT:
1488 RETVAL
1489
1490 UV
1491 makedev (UV maj, UV min)
1492 CODE:
1493 RETVAL = makedev (maj, min);
1494 OUTPUT:
1495 RETVAL
1496
1497 void
1498 aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
1499 PPCODE:
1500 {
1501 dREQ;
1502
1503 req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
1504 req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
1505 req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
1506
1507 REQ_SEND;
1508 }
1509
1510 void
1511 aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
1512 PPCODE:
1513 {
1514 dREQ;
1515
1516 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1517 req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
1518
1519 REQ_SEND;
1520 }
1521
1522 void
1523 aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
1524 PPCODE:
1525 {
1526 dREQ;
1527
1528 req->int2 = mode;
1529 req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
1530
1531 REQ_SEND;
1532 }
1533
1534 void
1535 aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
1536 PPCODE:
1537 {
1538 dREQ;
1539
1540 req->int2 = SvOK (uid) ? SvIV (uid) : -1;
1541 req->int3 = SvOK (gid) ? SvIV (gid) : -1;
1542 req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
1543
1544 REQ_SEND;
1545 }
1546
1547 void
1548 aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
1549 PPCODE:
1550 {
1551 dREQ;
1552
1553 req->type = EIO_READDIR;
1554 req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
1555
1556 if (flags & EIO_READDIR_DENTS)
1557 req->int1 |= EIO_READDIR_CUSTOM2;
1558
1559 req_set_path1 (req, pathname);
1560
1561 REQ_SEND;
1562 }
1563
1564 void
1565 aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
1566 PPCODE:
1567 {
1568 dREQ;
1569
1570 req->type = EIO_MKDIR;
1571 req->int2 = mode;
1572 req_set_path1 (req, pathname);
1573
1574 REQ_SEND;
1575 }
1576
1577 void
1578 aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
1579 ALIAS:
1580 aio_unlink = EIO_UNLINK
1581 aio_rmdir = EIO_RMDIR
1582 aio_readdir = EIO_READDIR
1583 PPCODE:
1584 {
1585 dREQ;
1586
1587 req->type = ix;
1588 req_set_path1 (req, pathname);
1589
1590 REQ_SEND;
1591 }
1592
1593 void
1594 aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1595 ALIAS:
1596 aio_link = EIO_LINK
1597 aio_symlink = EIO_SYMLINK
1598 aio_rename = EIO_RENAME
1599 PPCODE:
1600 {
1601 eio_wd wd2 = 0;
1602 dREQ;
1603
1604 req->type = ix;
1605 req_set_path1 (req, oldpath);
1606 req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1607 req->int3 = (long)wd2;
1608
1609 REQ_SEND;
1610 }
1611
1612 void
1613 aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
1614 PPCODE:
1615 {
1616 eio_wd wd2 = 0;
1617 dREQ;
1618
1619 req->type = EIO_RENAME;
1620 req_set_path1 (req, oldpath);
1621 req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1622 req->int2 = flags;
1623 req->int3 = (long)wd2;
1624
1625 REQ_SEND;
1626 }
1627
1628 void
1629 aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1630 PPCODE:
1631 {
1632 dREQ;
1633
1634 req->type = EIO_MKNOD;
1635 req->int2 = (mode_t)mode;
1636 req->offs = dev;
1637 req_set_path1 (req, pathname);
1638
1639 REQ_SEND;
1640 }
1641
1642 void
1643 aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
1644 ALIAS:
1645 aio_mtouch = EIO_MTOUCH
1646 aio_msync = EIO_MSYNC
1647 PPCODE:
1648 {
1649 STRLEN svlen;
1650 char *svptr = SvPVbyte (data, svlen);
1651 UV len = SvUV (length);
1652
1653 if (flags < 0)
1654 flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
1655
1656 if (offset < 0)
1657 offset += svlen;
1658
1659 if (offset < 0 || offset > svlen)
1660 croak ("offset outside of scalar");
1661
1662 if (!SvOK (length) || len + offset > svlen)
1663 len = svlen - offset;
1664
1665 {
1666 dREQ;
1667
1668 req->type = ix;
1669 req->sv2 = SvREFCNT_inc (data);
1670 req->ptr2 = (char *)svptr + offset;
1671 req->size = len;
1672 req->int1 = flags;
1673
1674 REQ_SEND;
1675 }
1676 }
1677
1678 void
1679 aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
1680 PPCODE:
1681 {
1682 STRLEN svlen;
1683 char *svptr = SvPVbyte (data, svlen);
1684 UV len = SvUV (length);
1685
1686 if (offset < 0)
1687 offset += svlen;
1688
1689 if (offset < 0 || offset > svlen)
1690 croak ("offset outside of scalar");
1691
1692 if (!SvOK (length) || len + offset > svlen)
1693 len = svlen - offset;
1694
1695 {
1696 dREQ;
1697
1698 req->type = EIO_MLOCK;
1699 req->sv2 = SvREFCNT_inc (data);
1700 req->ptr2 = (char *)svptr + offset;
1701 req->size = len;
1702
1703 REQ_SEND;
1704 }
1705 }
1706
1707 void
1708 aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
1709 PPCODE:
1710 {
1711 dREQ;
1712
1713 req->type = EIO_MLOCKALL;
1714 req->int1 = flags;
1715
1716 REQ_SEND;
1717 }
1718
1719 void
1720 aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
1721 PPCODE:
1722 {
1723 int fd = s_fileno_croak (fh, 0);
1724 dREQ;
1725
1726 req->type = EIO_CUSTOM;
1727 req->sv1 = newSVsv (fh);
1728 req->int1 = fd;
1729
1730 req->feed = fiemap;
1731 #if HAVE_FIEMAP
1732 /* keep our fingers crossed that the next two types are 64 bit */
1733 req->offs = start;
1734 req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
1735 req->int2 = flags;
1736 req->int3 = SvOK (count) ? SvIV (count) : -1;
1737 #endif
1738
1739 REQ_SEND;
1740 }
1741
1742 void
1743 aio_busy (double delay, SV *callback = &PL_sv_undef)
1744 PPCODE:
1745 {
1746 dREQ;
1747
1748 req->type = EIO_BUSY;
1749 req->nv1 = delay < 0. ? 0. : delay;
1750
1751 REQ_SEND;
1752 }
1753
1754 void
1755 aio_group (SV *callback = &PL_sv_undef)
1756 PPCODE:
1757 {
1758 dREQ;
1759
1760 req->type = EIO_GROUP;
1761
1762 PUTBACK;
1763 req_submit (req);
1764 SPAGAIN;
1765
1766 XPUSHs (req_sv (req, aio_grp_stash));
1767 }
1768
1769 void
1770 aio_nop (SV *callback = &PL_sv_undef)
1771 ALIAS:
1772 aio_nop = EIO_NOP
1773 aio_sync = EIO_SYNC
1774 PPCODE:
1775 {
1776 dREQ;
1777
1778 req->type = ix;
1779
1780 REQ_SEND;
1781 }
1782
1783 int
1784 aioreq_pri (int pri = NO_INIT)
1785 CODE:
1786 RETVAL = next_pri;
1787 if (items > 0)
1788 {
1789 if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1790 if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1791 next_pri = pri;
1792 }
1793 OUTPUT:
1794 RETVAL
1795
1796 void
1797 aioreq_nice (int nice = 0)
1798 CODE:
1799 nice = next_pri - nice;
1800 if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1801 if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1802 next_pri = nice;
1803
1804 void
1805 flush ()
1806 CODE:
1807 while (eio_nreqs ())
1808 {
1809 poll_wait ();
1810 poll_cb ();
1811 }
1812
1813 int
1814 poll ()
1815 CODE:
1816 poll_wait ();
1817 RETVAL = poll_cb ();
1818 OUTPUT:
1819 RETVAL
1820
1821 int
1822 poll_fileno ()
1823 CODE:
1824 RETVAL = s_epipe_fd (&respipe);
1825 OUTPUT:
1826 RETVAL
1827
1828 int
1829 poll_cb (...)
1830 PROTOTYPE:
1831 CODE:
1832 RETVAL = poll_cb ();
1833 OUTPUT:
1834 RETVAL
1835
1836 void
1837 poll_wait ()
1838 CODE:
1839 poll_wait ();
1840
1841 int
1842 nreqs ()
1843 CODE:
1844 RETVAL = eio_nreqs ();
1845 OUTPUT:
1846 RETVAL
1847
1848 int
1849 nready ()
1850 CODE:
1851 RETVAL = eio_nready ();
1852 OUTPUT:
1853 RETVAL
1854
1855 int
1856 npending ()
1857 CODE:
1858 RETVAL = eio_npending ();
1859 OUTPUT:
1860 RETVAL
1861
1862 int
1863 nthreads ()
1864 CODE:
1865 RETVAL = eio_nthreads ();
1866 OUTPUT:
1867 RETVAL
1868
1869 int
1870 fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
1871 CODE:
1872 RETVAL = posix_fadvise (fh, offset, length, advice);
1873 OUTPUT:
1874 RETVAL
1875
1876 IV
1877 sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
1878 CODE:
1879 RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
1880 OUTPUT:
1881 RETVAL
1882
1883 void
1884 mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
1885 PPCODE:
1886 sv_unmagic (scalar, MMAP_MAGIC);
1887 {
1888 int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
1889 void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
1890 if (addr == (void *)-1)
1891 XSRETURN_NO;
1892
1893 sv_force_normal (scalar);
1894
1895 /* we store the length in mg_obj, as namlen is I32 :/ */
1896 sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
1897 ->mg_obj = (SV *)length;
1898
1899 SvUPGRADE (scalar, SVt_PV); /* nop... */
1900
1901 if (!(prot & PROT_WRITE))
1902 SvREADONLY_on (scalar);
1903
1904 if (SvLEN (scalar))
1905 Safefree (SvPVX (scalar));
1906
1907 SvPVX (scalar) = (char *)addr;
1908 SvCUR_set (scalar, length);
1909 SvLEN_set (scalar, 0);
1910 SvPOK_only (scalar);
1911
1912 XSRETURN_YES;
1913 }
1914
1915 void
1916 munmap (SV *scalar)
1917 CODE:
1918 sv_unmagic (scalar, MMAP_MAGIC);
1919
1920 int
1921 madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
1922 ALIAS:
1923 mprotect = 1
1924 CODE:
1925 {
1926 STRLEN svlen;
1927 void *addr = SvPVbyte (scalar, svlen);
1928 STRLEN len = SvUV (length);
1929
1930 if (offset < 0)
1931 offset += svlen;
1932
1933 if (offset < 0 || offset > svlen)
1934 croak ("offset outside of scalar");
1935
1936 if (!SvOK (length) || len + offset > svlen)
1937 len = svlen - offset;
1938
1939 addr = (void *)(((intptr_t)addr) + offset);
1940 eio_page_align (&addr, &len);
1941
1942 switch (ix)
1943 {
1944 case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
1945 case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
1946 }
1947 }
1948 OUTPUT:
1949 RETVAL
1950
1951 int
1952 munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
1953 CODE:
1954 {
1955 STRLEN svlen;
1956 void *addr = SvPVbyte (scalar, svlen);
1957 size_t len = SvUV (length);
1958
1959 if (offset < 0)
1960 offset += svlen;
1961
1962 if (offset < 0 || offset > svlen)
1963 croak ("offset outside of scalar");
1964
1965 if (!SvOK (length) || len + offset > svlen)
1966 len = svlen - offset;
1967
1968 addr = (void *)(((intptr_t)addr) + offset);
1969 eio_page_align (&addr, &len);
1970 #if _POSIX_MEMLOCK_RANGE
1971 RETVAL = munlock (addr, len);
1972 #else
1973 RETVAL = EIO_ENOSYS ();
1974 #endif
1975 }
1976 OUTPUT:
1977 RETVAL
1978
1979 int
1980 munlockall ()
1981 CODE:
1982 #if _POSIX_MEMLOCK
1983 munlockall ();
1984 #else
1985 RETVAL = EIO_ENOSYS ();
1986 #endif
1987 OUTPUT:
1988 RETVAL
1989
1990 int
1991 splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
1992 CODE:
1993 {
1994 #if HAVE_LINUX_SPLICE
1995 loff_t off_in_, off_out_;
1996 RETVAL = splice (
1997 rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
1998 wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
1999 length, flags
2000 );
2001 #else
2002 RETVAL = EIO_ENOSYS ();
2003 #endif
2004 }
2005 OUTPUT:
2006 RETVAL
2007
2008 int
2009 tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
2010 CODE:
2011 #if HAVE_LINUX_SPLICE
2012 RETVAL = tee (rfh, wfh, length, flags);
2013 #else
2014 RETVAL = EIO_ENOSYS ();
2015 #endif
2016 OUTPUT:
2017 RETVAL
2018
2019 int
2020 pipesize (aio_rfd rfh, int new_size = -1)
2021 PROTOTYPE: $;$
2022 CODE:
2023 #if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
2024 if (new_size >= 0)
2025 RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
2026 else
2027 RETVAL = fcntl (rfh, F_GETPIPE_SZ);
2028 #else
2029 errno = ENOSYS;
2030 RETVAL = -1;
2031 #endif
2032 OUTPUT:
2033 RETVAL
2034
2035 void
2036 pipe2 (int flags = 0)
2037 PROTOTYPE: ;$
2038 PPCODE:
2039 {
2040 int fd[2];
2041 int res;
2042
2043 if (flags)
2044 #if HAVE_PIPE2
2045 res = pipe2 (fd, flags);
2046 #else
2047 res = (errno = ENOSYS, -1);
2048 #endif
2049 else
2050 res = pipe (fd);
2051
2052 if (!res)
2053 {
2054 EXTEND (SP, 2);
2055 PUSHs (newmortalFH (fd[0], O_RDONLY));
2056 PUSHs (newmortalFH (fd[1], O_WRONLY));
2057 }
2058 }
2059
2060 UV
2061 get_fdlimit ()
2062 CODE:
2063 #if HAVE_RLIMITS
2064 struct rlimit rl;
2065 if (0 == getrlimit (RLIMIT_NOFILE, &rl))
2066 XSRETURN_UV (rl.rlim_cur == RLIM_INFINITY ? (UV)-1 : rl.rlim_cur);
2067 #endif
2068 XSRETURN_UNDEF;
2069 OUTPUT:
2070 RETVAL
2071
2072 void
2073 min_fdlimit (UV limit = 0x7fffffffU)
2074 CODE:
2075 {
2076 #if HAVE_RLIMITS
2077 struct rlimit rl;
2078 rlim_t orig_rlim_max;
2079 UV bit;
2080
2081 if (0 != getrlimit (RLIMIT_NOFILE, &rl))
2082 goto fail;
2083
2084 if (rl.rlim_cur == RLIM_INFINITY)
2085 XSRETURN_YES;
2086
2087 orig_rlim_max = rl.rlim_max == RLIM_INFINITY ? ((rlim_t)0)-1 : rl.rlim_max;
2088
2089 if (rl.rlim_cur < limit)
2090 {
2091 rl.rlim_cur = limit;
2092
2093 if (rl.rlim_max < rl.rlim_cur && rl.rlim_max != RLIM_INFINITY)
2094 rl.rlim_max = rl.rlim_cur;
2095 }
2096
2097 if (0 == setrlimit (RLIMIT_NOFILE, &rl))
2098 XSRETURN_YES;
2099
2100 if (errno == EPERM)
2101 {
2102 /* setlimit failed with EPERM - maybe we can't raise the hardlimit, or maybe */
2103 /* our limit overflows a system-wide limit */
2104 /* try an adaptive algorithm, but do not lower the hardlimit */
2105 rl.rlim_max = 0;
2106 for (bit = 0x40000000U; bit; bit >>= 1)
2107 {
2108 rl.rlim_max |= bit;
2109 rl.rlim_cur = rl.rlim_max;
2110
2111 /* nevr decrease the hard limit */
2112 if (rl.rlim_max < orig_rlim_max)
2113 break;
2114
2115 if (0 != setrlimit (RLIMIT_NOFILE, &rl))
2116 rl.rlim_max &= ~bit; /* too high, remove bit again */
2117 }
2118
2119 /* now, raise the soft limit to the max permitted */
2120 if (0 == getrlimit (RLIMIT_NOFILE, &rl))
2121 {
2122 rl.rlim_cur = rl.rlim_max;
2123 if (0 == setrlimit (RLIMIT_NOFILE, &rl))
2124 errno = EPERM;
2125 }
2126 }
2127 #endif
2128 fail:
2129 XSRETURN_UNDEF;
2130 }
2131
2132 void _on_next_submit (SV *cb)
2133 CODE:
2134 SvREFCNT_dec (on_next_submit);
2135 on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
2136
2137 PROTOTYPES: DISABLE
2138
2139 MODULE = IO::AIO PACKAGE = IO::AIO::WD
2140
2141 BOOT:
2142 {
2143 newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
2144 newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
2145 }
2146
2147 void
2148 DESTROY (SV *self)
2149 CODE:
2150 {
2151 aio_wd wd = SvAIO_WD (self);
2152 #if HAVE_AT
2153 {
2154 SV *callback = &PL_sv_undef;
2155 dREQ; /* clobbers next_pri :/ */
2156 next_pri = req->pri; /* restore next_pri */
2157 req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
2158 req->type = EIO_WD_CLOSE;
2159 req->wd = wd;
2160 REQ_SEND;
2161 }
2162 #else
2163 eio_wd_close_sync (wd);
2164 #endif
2165 }
2166
2167 MODULE = IO::AIO PACKAGE = IO::AIO::REQ
2168
2169 void
2170 cancel (aio_req_ornot req)
2171 CODE:
2172 eio_cancel (req);
2173
2174 void
2175 cb (aio_req_ornot req, SV *callback = NO_INIT)
2176 PPCODE:
2177 {
2178 if (GIMME_V != G_VOID)
2179 XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
2180
2181 if (items > 1)
2182 {
2183 SV *cb_cv = get_cb (callback);
2184
2185 SvREFCNT_dec (req->callback);
2186 req->callback = SvREFCNT_inc (cb_cv);
2187 }
2188 }
2189
2190 MODULE = IO::AIO PACKAGE = IO::AIO::GRP
2191
2192 void
2193 add (aio_req grp, ...)
2194 PPCODE:
2195 {
2196 int i;
2197
2198 if (grp->int1 == 2)
2199 croak ("cannot add requests to IO::AIO::GRP after the group finished");
2200
2201 for (i = 1; i < items; ++i )
2202 {
2203 aio_req req;
2204
2205 if (GIMME_V != G_VOID)
2206 XPUSHs (sv_2mortal (newSVsv (ST (i))));
2207
2208 req = SvAIO_REQ (ST (i));
2209
2210 if (req)
2211 eio_grp_add (grp, req);
2212 }
2213 }
2214
2215 void
2216 cancel_subs (aio_req_ornot req)
2217 CODE:
2218 req_cancel_subs (req);
2219
2220 void
2221 result (aio_req grp, ...)
2222 CODE:
2223 {
2224 int i;
2225 AV *av;
2226
2227 grp->errorno = errno;
2228
2229 av = newAV ();
2230 av_extend (av, items - 1);
2231
2232 for (i = 1; i < items; ++i )
2233 av_push (av, newSVsv (ST (i)));
2234
2235 SvREFCNT_dec (grp->sv1);
2236 grp->sv1 = (SV *)av;
2237 }
2238
2239 void
2240 errno (aio_req grp, int errorno = errno)
2241 CODE:
2242 grp->errorno = errorno;
2243
2244 void
2245 limit (aio_req grp, int limit)
2246 CODE:
2247 eio_grp_limit (grp, limit);
2248
2249 void
2250 feed (aio_req grp, SV *callback = &PL_sv_undef)
2251 CODE:
2252 {
2253 SvREFCNT_dec (grp->sv2);
2254 grp->sv2 = newSVsv (callback);
2255 grp->feed = aio_grp_feed;
2256
2257 if (grp->int2 <= 0)
2258 grp->int2 = 2;
2259
2260 eio_grp_limit (grp, grp->int2);
2261 }
2262