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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.28 by root, Wed Aug 17 05:06:59 2005 UTC vs.
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC

… …
5#include "perl.h" 5#include "perl.h"
6#include "XSUB.h" 6#include "XSUB.h"
7 7
8#include "autoconf/config.h" 8#include "autoconf/config.h"
9 9
10#include <pthread.h>
11
12#include <stddef.h>
13#include <errno.h>
10#include <sys/types.h> 14#include <sys/types.h>
11#include <sys/stat.h> 15#include <sys/stat.h>
12 16#include <limits.h>
13#include <unistd.h> 17#include <unistd.h>
14#include <fcntl.h> 18#include <fcntl.h>
15#include <signal.h> 19#include <signal.h>
16#include <sched.h> 20#include <sched.h>
17 21
18#include <pthread.h> 22#if HAVE_SENDFILE
23# if __linux
24# include <sys/sendfile.h>
25# elif __freebsd
26# include <sys/socket.h>
27# include <sys/uio.h>
28# elif __hpux
29# include <sys/socket.h>
30# elif __solaris /* not yet */
31# include <sys/sendfile.h>
32# else
33# error sendfile support requested but not available
34# endif
35#endif
19 36
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 37/* used for struct dirent, AIX doesn't provide it */
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 38#ifndef NAME_MAX
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 39# define NAME_MAX 4096
40#endif
23 41
24#if __ia64 42#if __ia64
25# define STACKSIZE 65536 43# define STACKSIZE 65536
26#else 44#else
27# define STACKSIZE 4096 45# define STACKSIZE 8192
28#endif 46#endif
29 47
30enum { 48enum {
31 REQ_QUIT, 49 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 50 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 51 REQ_READ, REQ_WRITE, REQ_READAHEAD,
52 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, 53 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 54 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR, 55 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37 REQ_SYMLINK, 56 REQ_READDIR,
57 REQ_LINK, REQ_SYMLINK,
38}; 58};
39 59
60#define AIO_CB_KLASS "IO::AIO::CB"
61
40typedef struct aio_cb { 62typedef struct aio_cb
63{
64 struct aio_cb *grp_prev, *grp_next;
65 struct aio_grp *grp;
66
41 struct aio_cb *volatile next; 67 struct aio_cb *volatile next;
42 68
43 int type; 69 SV *self; /* the perl counterpart of this request, if any */
44 70
45 int fd; 71 SV *data, *callback;
72 SV *fh, *fh2;
73 void *dataptr, *data2ptr;
74 Stat_t *statdata;
46 off_t offset; 75 off_t offset;
47 size_t length; 76 size_t length;
48 ssize_t result; 77 ssize_t result;
78
79 int type;
80 int fd, fd2;
81 int errorno;
82 STRLEN dataoffset;
49 mode_t mode; /* open */ 83 mode_t mode; /* open */
50 int errorno; 84 unsigned char cancelled;
51 SV *data, *callback, *fh;
52 void *dataptr, *data2ptr;
53 STRLEN dataoffset;
54
55 Stat_t *statdata;
56} aio_cb; 85} aio_cb;
57 86
58typedef aio_cb *aio_req; 87typedef aio_cb *aio_req;
88typedef aio_cb *aio_req_ornot;
59 89
60static int started; 90static int started, wanted;
61static volatile int nreqs; 91static volatile int nreqs;
62static int max_outstanding = 1<<30; 92static int max_outstanding = 1<<30;
63static int respipe [2]; 93static int respipe [2];
64 94
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 95static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
… …
67static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 97static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68 98
69static volatile aio_req reqs, reqe; /* queue start, queue end */ 99static volatile aio_req reqs, reqe; /* queue start, queue end */
70static volatile aio_req ress, rese; /* queue start, queue end */ 100static volatile aio_req ress, rese; /* queue start, queue end */
71 101
102typedef struct aio_grp
103{
104 struct aio_cb *first, *last;
105 SV *callback;
106 int busycount;
107} aio_grp;
108
109static void aio_grp_begin (aio_grp *grp)
110{
111 ++grp->busycount;
112}
113
114static void aio_grp_end (aio_grp *grp)
115{
116 --grp->busycount;
117
118 if (grp->busycount)
119 return;
120
121 SvREFCNT_dec (grp->callback);
122 grp->callback = 0;
123}
124
125static aio_grp *aio_grp_new ()
126{
127 aio_grp *grp;
128
129 Newz (0, grp, 1, aio_grp);
130 aio_grp_begin (grp);
131
132 return grp;
133}
134
135/* must be called at most once */
136static SV *req_sv (aio_req req)
137{
138 req->self = (SV *)newHV ();
139 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
140
141 return sv_bless (newRV_noinc (req->self), gv_stashpv (AIO_CB_KLASS, 1));
142}
143
144static aio_req SvAIO_REQ (SV *sv)
145{
146 if (!sv_derived_from (sv, AIO_CB_KLASS) || !SvROK (sv))
147 croak ("object of class " AIO_CB_KLASS " expected");
148
149 MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
150
151 return mg ? (aio_req)mg->mg_ptr : 0;
152}
153
72static void free_req (aio_req req) 154static void req_free (aio_req req)
73{ 155{
156 if (req->self)
157 {
158 sv_unmagic (req->self, PERL_MAGIC_ext);
159 SvREFCNT_dec (req->self);
160 }
161
74 if (req->data) 162 if (req->data)
75 SvREFCNT_dec (req->data); 163 SvREFCNT_dec (req->data);
76 164
77 if (req->fh) 165 if (req->fh)
78 SvREFCNT_dec (req->fh); 166 SvREFCNT_dec (req->fh);
79 167
168 if (req->fh2)
169 SvREFCNT_dec (req->fh2);
170
80 if (req->statdata) 171 if (req->statdata)
81 Safefree (req->statdata); 172 Safefree (req->statdata);
82 173
83 if (req->callback) 174 if (req->callback)
84 SvREFCNT_dec (req->callback); 175 SvREFCNT_dec (req->callback);
176
177 if (req->type == REQ_READDIR && req->result >= 0)
178 free (req->data2ptr);
85 179
86 Safefree (req); 180 Safefree (req);
87} 181}
88 182
89static void 183static void
… …
116 { 210 {
117 ress = req->next; 211 ress = req->next;
118 212
119 if (!ress) 213 if (!ress)
120 { 214 {
121 rese = 0;
122
123 /* read any signals sent by the worker threads */ 215 /* read any signals sent by the worker threads */
124 char buf [32]; 216 char buf [32];
125 while (read (respipe [0], buf, 32) == 32) 217 while (read (respipe [0], buf, 32) == 32)
126 ; 218 ;
219
220 rese = 0;
127 } 221 }
128 } 222 }
129 223
130 pthread_mutex_unlock (&reslock); 224 pthread_mutex_unlock (&reslock);
131 225
… …
154 PL_statcache = *(req->statdata); 248 PL_statcache = *(req->statdata);
155 } 249 }
156 250
157 ENTER; 251 ENTER;
158 PUSHMARK (SP); 252 PUSHMARK (SP);
159 XPUSHs (sv_2mortal (newSViv (req->result)));
160 253
161 if (req->type == REQ_OPEN) 254 if (req->type == REQ_READDIR)
162 { 255 {
163 /* convert fd to fh */ 256 SV *rv = &PL_sv_undef;
164 SV *fh;
165 257
166 PUTBACK; 258 if (req->result >= 0)
167 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 259 {
168 SPAGAIN; 260 char *buf = req->data2ptr;
261 AV *av = newAV ();
169 262
170 fh = SvREFCNT_inc (POPs); 263 while (req->result)
264 {
265 SV *sv = newSVpv (buf, 0);
171 266
267 av_push (av, sv);
268 buf += SvCUR (sv) + 1;
269 req->result--;
270 }
271
272 rv = sv_2mortal (newRV_noinc ((SV *)av));
273 }
274
172 PUSHMARK (SP); 275 XPUSHs (rv);
173 XPUSHs (sv_2mortal (fh));
174 } 276 }
277 else
278 {
279 XPUSHs (sv_2mortal (newSViv (req->result)));
175 280
281 if (req->type == REQ_OPEN)
282 {
283 /* convert fd to fh */
284 SV *fh;
285
286 PUTBACK;
287 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
288 SPAGAIN;
289
290 fh = SvREFCNT_inc (POPs);
291
292 PUSHMARK (SP);
293 XPUSHs (sv_2mortal (fh));
294 }
295 }
296
176 if (SvOK (req->callback)) 297 if (SvOK (req->callback) && !req->cancelled)
177 { 298 {
178 PUTBACK; 299 PUTBACK;
179 call_sv (req->callback, G_VOID | G_EVAL); 300 call_sv (req->callback, G_VOID | G_EVAL);
180 SPAGAIN; 301 SPAGAIN;
181 302
182 if (SvTRUE (ERRSV)) 303 if (SvTRUE (ERRSV))
183 { 304 {
184 free_req (req); 305 req_free (req);
185 croak (0); 306 croak (0);
186 } 307 }
187 } 308 }
188 309
189 LEAVE; 310 LEAVE;
190 311
191 errno = errorno; 312 errno = errorno;
192 count++; 313 count++;
193 } 314 }
194 315
195 free_req (req); 316 req_free (req);
196 } 317 }
197 318
198 return count; 319 return count;
199} 320}
200 321
… …
219 340
220 sigprocmask (SIG_SETMASK, &oldsigset, 0); 341 sigprocmask (SIG_SETMASK, &oldsigset, 0);
221} 342}
222 343
223static void 344static void
224send_req (aio_req req) 345req_send (aio_req req)
225{ 346{
347 while (started < wanted && nreqs >= started)
348 start_thread ();
349
226 nreqs++; 350 nreqs++;
227 351
228 pthread_mutex_lock (&reqlock); 352 pthread_mutex_lock (&reqlock);
229 353
230 req->next = 0; 354 req->next = 0;
… …
257{ 381{
258 aio_req req; 382 aio_req req;
259 Newz (0, req, 1, aio_cb); 383 Newz (0, req, 1, aio_cb);
260 req->type = REQ_QUIT; 384 req->type = REQ_QUIT;
261 385
262 send_req (req); 386 req_send (req);
263} 387}
264 388
265static void min_parallel (int nthreads) 389static void min_parallel (int nthreads)
266{ 390{
267 while (nthreads > started) 391 if (wanted < nthreads)
268 start_thread (); 392 wanted = nthreads;
269} 393}
270 394
271static void max_parallel (int nthreads) 395static void max_parallel (int nthreads)
272{ 396{
273 int cur = started; 397 int cur = started;
274 398
399 if (wanted > nthreads)
400 wanted = nthreads;
401
275 while (cur > nthreads) 402 while (cur > wanted)
276 { 403 {
277 end_thread (); 404 end_thread ();
278 cur--; 405 cur--;
279 } 406 }
280 407
281 while (started > nthreads) 408 while (started > wanted)
282 { 409 {
283 poll_wait (); 410 poll_wait ();
284 poll_cb (); 411 poll_cb ();
285 } 412 }
286} 413}
… …
293 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 420 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
294 croak ("cannot set result pipe to nonblocking mode"); 421 croak ("cannot set result pipe to nonblocking mode");
295 422
296 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 423 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
297 croak ("cannot set result pipe to nonblocking mode"); 424 croak ("cannot set result pipe to nonblocking mode");
298}
299
300static void atfork_prepare (void)
301{
302 pthread_mutex_lock (&reqlock);
303 pthread_mutex_lock (&reslock);
304}
305
306static void atfork_parent (void)
307{
308 pthread_mutex_unlock (&reslock);
309 pthread_mutex_unlock (&reqlock);
310}
311
312static void atfork_child (void)
313{
314 aio_req prv;
315
316 int restart = started;
317 started = 0;
318
319 while (reqs)
320 {
321 prv = reqs;
322 reqs = prv->next;
323 free_req (prv);
324 }
325
326 reqs = reqe = 0;
327
328 while (ress)
329 {
330 prv = ress;
331 ress = prv->next;
332 free_req (prv);
333 }
334
335 ress = rese = 0;
336
337 atfork_parent ();
338
339 min_parallel (restart);
340} 425}
341 426
342/*****************************************************************************/ 427/*****************************************************************************/
343/* work around various missing functions */ 428/* work around various missing functions */
344 429
… …
349/* 434/*
350 * make our pread/pwrite safe against themselves, but not against 435 * make our pread/pwrite safe against themselves, but not against
351 * normal read/write by using a mutex. slows down execution a lot, 436 * normal read/write by using a mutex. slows down execution a lot,
352 * but that's your problem, not mine. 437 * but that's your problem, not mine.
353 */ 438 */
354static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 439static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
355 440
356static ssize_t 441static ssize_t
357pread (int fd, void *buf, size_t count, off_t offset) 442pread (int fd, void *buf, size_t count, off_t offset)
358{ 443{
359 ssize_t res; 444 ssize_t res;
360 off_t ooffset; 445 off_t ooffset;
361 446
362 pthread_mutex_lock (&iolock); 447 pthread_mutex_lock (&preadwritelock);
363 ooffset = lseek (fd, 0, SEEK_CUR); 448 ooffset = lseek (fd, 0, SEEK_CUR);
364 lseek (fd, offset, SEEK_SET); 449 lseek (fd, offset, SEEK_SET);
365 res = read (fd, buf, count); 450 res = read (fd, buf, count);
366 lseek (fd, ooffset, SEEK_SET); 451 lseek (fd, ooffset, SEEK_SET);
367 pthread_mutex_unlock (&iolock); 452 pthread_mutex_unlock (&preadwritelock);
368 453
369 return res; 454 return res;
370} 455}
371 456
372static ssize_t 457static ssize_t
373pwrite (int fd, void *buf, size_t count, off_t offset) 458pwrite (int fd, void *buf, size_t count, off_t offset)
374{ 459{
375 ssize_t res; 460 ssize_t res;
376 off_t ooffset; 461 off_t ooffset;
377 462
378 pthread_mutex_lock (&iolock); 463 pthread_mutex_lock (&preadwritelock);
379 ooffset = lseek (fd, 0, SEEK_CUR); 464 ooffset = lseek (fd, 0, SEEK_CUR);
380 lseek (fd, offset, SEEK_SET); 465 lseek (fd, offset, SEEK_SET);
381 res = write (fd, buf, count); 466 res = write (fd, buf, count);
382 lseek (fd, offset, SEEK_SET); 467 lseek (fd, offset, SEEK_SET);
383 pthread_mutex_unlock (&iolock); 468 pthread_mutex_unlock (&preadwritelock);
384 469
385 return res; 470 return res;
386} 471}
387#endif 472#endif
388 473
… …
391#endif 476#endif
392 477
393#if !HAVE_READAHEAD 478#if !HAVE_READAHEAD
394# define readahead aio_readahead 479# define readahead aio_readahead
395 480
396static char readahead_buf[4096];
397
398static ssize_t 481static ssize_t
399readahead (int fd, off_t offset, size_t count) 482readahead (int fd, off_t offset, size_t count)
400{ 483{
484 char readahead_buf[4096];
485
401 while (count > 0) 486 while (count > 0)
402 { 487 {
403 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 488 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
404 489
405 pread (fd, readahead_buf, len, offset); 490 pread (fd, readahead_buf, len, offset);
… …
408 } 493 }
409 494
410 errno = 0; 495 errno = 0;
411} 496}
412#endif 497#endif
498
499#if !HAVE_READDIR_R
500# define readdir_r aio_readdir_r
501
502static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
503
504static int
505readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
506{
507 struct dirent *e;
508 int errorno;
509
510 pthread_mutex_lock (&readdirlock);
511
512 e = readdir (dirp);
513 errorno = errno;
514
515 if (e)
516 {
517 *res = ent;
518 strcpy (ent->d_name, e->d_name);
519 }
520 else
521 *res = 0;
522
523 pthread_mutex_unlock (&readdirlock);
524
525 errno = errorno;
526 return e ? 0 : -1;
527}
528#endif
529
530/* sendfile always needs emulation */
531static ssize_t
532sendfile_ (int ofd, int ifd, off_t offset, size_t count)
533{
534 ssize_t res;
535
536 if (!count)
537 return 0;
538
539#if HAVE_SENDFILE
540# if __linux
541 res = sendfile (ofd, ifd, &offset, count);
542
543# elif __freebsd
544 /*
545 * Of course, the freebsd sendfile is a dire hack with no thoughts
546 * wasted on making it similar to other I/O functions.
547 */
548 {
549 off_t sbytes;
550 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
551
552 if (res < 0 && sbytes)
553 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
554 res = sbytes;
555 }
556
557# elif __hpux
558 res = sendfile (ofd, ifd, offset, count, 0, 0);
559
560# elif __solaris
561 {
562 struct sendfilevec vec;
563 size_t sbytes;
564
565 vec.sfv_fd = ifd;
566 vec.sfv_flag = 0;
567 vec.sfv_off = offset;
568 vec.sfv_len = count;
569
570 res = sendfilev (ofd, &vec, 1, &sbytes);
571
572 if (res < 0 && sbytes)
573 res = sbytes;
574 }
575
576# endif
577#else
578 res = -1;
579 errno = ENOSYS;
580#endif
581
582 if (res < 0
583 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
584#if __solaris
585 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
586#endif
587 )
588 )
589 {
590 /* emulate sendfile. this is a major pain in the ass */
591 char buf[4096];
592 res = 0;
593
594 while (count)
595 {
596 ssize_t cnt;
597
598 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
599
600 if (cnt <= 0)
601 {
602 if (cnt && !res) res = -1;
603 break;
604 }
605
606 cnt = write (ofd, buf, cnt);
607
608 if (cnt <= 0)
609 {
610 if (cnt && !res) res = -1;
611 break;
612 }
613
614 offset += cnt;
615 res += cnt;
616 count -= cnt;
617 }
618 }
619
620 return res;
621}
622
623/* read a full directory */
624static int
625scandir_ (const char *path, void **namesp)
626{
627 DIR *dirp = opendir (path);
628 union
629 {
630 struct dirent d;
631 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
632 } u;
633 struct dirent *entp;
634 char *name, *names;
635 int memlen = 4096;
636 int memofs = 0;
637 int res = 0;
638 int errorno;
639
640 if (!dirp)
641 return -1;
642
643 names = malloc (memlen);
644
645 for (;;)
646 {
647 errno = 0, readdir_r (dirp, &u.d, &entp);
648
649 if (!entp)
650 break;
651
652 name = entp->d_name;
653
654 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
655 {
656 int len = strlen (name) + 1;
657
658 res++;
659
660 while (memofs + len > memlen)
661 {
662 memlen *= 2;
663 names = realloc (names, memlen);
664 if (!names)
665 break;
666 }
667
668 memcpy (names + memofs, name, len);
669 memofs += len;
670 }
671 }
672
673 errorno = errno;
674 closedir (dirp);
675
676 if (errorno)
677 {
678 free (names);
679 errno = errorno;
680 res = -1;
681 }
682
683 *namesp = (void *)names;
684 return res;
685}
413 686
414/*****************************************************************************/ 687/*****************************************************************************/
415 688
416static void * 689static void *
417aio_proc (void *thr_arg) 690aio_proc (void *thr_arg)
… …
441 714
442 pthread_mutex_unlock (&reqlock); 715 pthread_mutex_unlock (&reqlock);
443 716
444 errno = 0; /* strictly unnecessary */ 717 errno = 0; /* strictly unnecessary */
445 718
446 type = req->type; 719 if (!req->cancelled)
447
448 switch (type) 720 switch (req->type)
449 { 721 {
450 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 722 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
451 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 723 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
452 724
453 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 725 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
726 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
454 727
455 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 728 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
456 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 729 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
457 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 730 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
458 731
459 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 732 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
460 case REQ_CLOSE: req->result = close (req->fd); break; 733 case REQ_CLOSE: req->result = close (req->fd); break;
461 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 734 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
462 case REQ_RMDIR: req->result = rmdir (req->dataptr); break; 735 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
736 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
737 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
463 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 738 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
464 739
465 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 740 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
466 case REQ_FSYNC: req->result = fsync (req->fd); break; 741 case REQ_FSYNC: req->result = fsync (req->fd); break;
742 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
467 743
468 case REQ_QUIT: 744 case REQ_QUIT:
469 break; 745 break;
470 746
471 default: 747 default:
472 req->result = ENOSYS; 748 req->result = ENOSYS;
473 break; 749 break;
474 } 750 }
475 751
476 req->errorno = errno; 752 req->errorno = errno;
477 753
478 pthread_mutex_lock (&reslock); 754 pthread_mutex_lock (&reslock);
479 755
… …
497 while (type != REQ_QUIT); 773 while (type != REQ_QUIT);
498 774
499 return 0; 775 return 0;
500} 776}
501 777
778/*****************************************************************************/
779
780static void atfork_prepare (void)
781{
782 pthread_mutex_lock (&reqlock);
783 pthread_mutex_lock (&reslock);
784#if !HAVE_PREADWRITE
785 pthread_mutex_lock (&preadwritelock);
786#endif
787#if !HAVE_READDIR_R
788 pthread_mutex_lock (&readdirlock);
789#endif
790}
791
792static void atfork_parent (void)
793{
794#if !HAVE_READDIR_R
795 pthread_mutex_unlock (&readdirlock);
796#endif
797#if !HAVE_PREADWRITE
798 pthread_mutex_unlock (&preadwritelock);
799#endif
800 pthread_mutex_unlock (&reslock);
801 pthread_mutex_unlock (&reqlock);
802}
803
804static void atfork_child (void)
805{
806 aio_req prv;
807
808 started = 0;
809
810 while (reqs)
811 {
812 prv = reqs;
813 reqs = prv->next;
814 req_free (prv);
815 }
816
817 reqs = reqe = 0;
818
819 while (ress)
820 {
821 prv = ress;
822 ress = prv->next;
823 req_free (prv);
824 }
825
826 ress = rese = 0;
827
828 close (respipe [0]);
829 close (respipe [1]);
830 create_pipe ();
831
832 atfork_parent ();
833}
834
502#define dREQ \ 835#define dREQ \
503 aio_req req; \ 836 aio_req req; \
504 \ 837 \
505 if (SvOK (callback) && !SvROK (callback)) \ 838 if (SvOK (callback) && !SvROK (callback)) \
506 croak ("clalback must be undef or of reference type"); \ 839 croak ("callback must be undef or of reference type"); \
507 \ 840 \
508 Newz (0, req, 1, aio_cb); \ 841 Newz (0, req, 1, aio_cb); \
509 if (!req) \ 842 if (!req) \
510 croak ("out of memory during aio_req allocation"); \ 843 croak ("out of memory during aio_req allocation"); \
511 \ 844 \
512 req->callback = newSVsv (callback); 845 req->callback = newSVsv (callback)
846
847#define REQ_SEND \
848 req_send (req); \
849 \
850 if (GIMME_V != G_VOID) \
851 XPUSHs (req_sv (req));
513 852
514MODULE = IO::AIO PACKAGE = IO::AIO 853MODULE = IO::AIO PACKAGE = IO::AIO
515 854
516PROTOTYPES: ENABLE 855PROTOTYPES: ENABLE
517 856
518BOOT: 857BOOT:
519{ 858{
859 HV *stash = gv_stashpv ("IO::AIO", 1);
860 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
861 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
862 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
863
520 create_pipe (); 864 create_pipe ();
521 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 865 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
522} 866}
523 867
524void 868void
525min_parallel(nthreads) 869min_parallel (nthreads)
526 int nthreads 870 int nthreads
527 PROTOTYPE: $ 871 PROTOTYPE: $
528 872
529void 873void
530max_parallel(nthreads) 874max_parallel (nthreads)
531 int nthreads 875 int nthreads
532 PROTOTYPE: $ 876 PROTOTYPE: $
533 877
534int 878int
535max_outstanding(nreqs) 879max_outstanding (nreqs)
536 int nreqs 880 int nreqs
537 PROTOTYPE: $ 881 PROTOTYPE: $
538 CODE: 882 CODE:
539 RETVAL = max_outstanding; 883 RETVAL = max_outstanding;
540 max_outstanding = nreqs; 884 max_outstanding = nreqs;
541 885
542void 886void
543aio_open(pathname,flags,mode,callback=&PL_sv_undef) 887aio_open (pathname,flags,mode,callback=&PL_sv_undef)
544 SV * pathname 888 SV * pathname
545 int flags 889 int flags
546 int mode 890 int mode
547 SV * callback 891 SV * callback
548 PROTOTYPE: $$$;$ 892 PROTOTYPE: $$$;$
549 CODE: 893 PPCODE:
550{ 894{
551 dREQ; 895 dREQ;
552 896
553 req->type = REQ_OPEN; 897 req->type = REQ_OPEN;
554 req->data = newSVsv (pathname); 898 req->data = newSVsv (pathname);
555 req->dataptr = SvPVbyte_nolen (req->data); 899 req->dataptr = SvPVbyte_nolen (req->data);
556 req->fd = flags; 900 req->fd = flags;
557 req->mode = mode; 901 req->mode = mode;
558 902
559 send_req (req); 903 REQ_SEND;
560} 904}
561 905
562void 906void
563aio_close(fh,callback=&PL_sv_undef) 907aio_close (fh,callback=&PL_sv_undef)
564 SV * fh 908 SV * fh
565 SV * callback 909 SV * callback
566 PROTOTYPE: $;$ 910 PROTOTYPE: $;$
567 ALIAS: 911 ALIAS:
568 aio_close = REQ_CLOSE 912 aio_close = REQ_CLOSE
569 aio_fsync = REQ_FSYNC 913 aio_fsync = REQ_FSYNC
570 aio_fdatasync = REQ_FDATASYNC 914 aio_fdatasync = REQ_FDATASYNC
571 CODE: 915 PPCODE:
572{ 916{
573 dREQ; 917 dREQ;
574 918
575 req->type = ix; 919 req->type = ix;
576 req->fh = newSVsv (fh); 920 req->fh = newSVsv (fh);
577 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 921 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
578 922
579 send_req (req); 923 REQ_SEND (req);
580} 924}
581 925
582void 926void
583aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 927aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
584 SV * fh 928 SV * fh
585 UV offset 929 UV offset
586 IV length 930 UV length
587 SV * data 931 SV * data
588 IV dataoffset 932 UV dataoffset
589 SV * callback 933 SV * callback
590 ALIAS: 934 ALIAS:
591 aio_read = REQ_READ 935 aio_read = REQ_READ
592 aio_write = REQ_WRITE 936 aio_write = REQ_WRITE
593 PROTOTYPE: $$$$$;$ 937 PROTOTYPE: $$$$$;$
594 CODE: 938 PPCODE:
595{ 939{
596 aio_req req; 940 aio_req req;
597 STRLEN svlen; 941 STRLEN svlen;
598 char *svptr = SvPVbyte (data, svlen); 942 char *svptr = SvPVbyte (data, svlen);
599 943
… …
637 { 981 {
638 SvREADONLY_on (data); 982 SvREADONLY_on (data);
639 req->data2ptr = (void *)data; 983 req->data2ptr = (void *)data;
640 } 984 }
641 985
642 send_req (req); 986 REQ_SEND;
643 } 987 }
644} 988}
645 989
646void 990void
991aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
992 SV * out_fh
993 SV * in_fh
994 UV in_offset
995 UV length
996 SV * callback
997 PROTOTYPE: $$$$;$
998 PPCODE:
999{
1000 dREQ;
1001
1002 req->type = REQ_SENDFILE;
1003 req->fh = newSVsv (out_fh);
1004 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1005 req->fh2 = newSVsv (in_fh);
1006 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1007 req->offset = in_offset;
1008 req->length = length;
1009
1010 REQ_SEND;
1011}
1012
1013void
647aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1014aio_readahead (fh,offset,length,callback=&PL_sv_undef)
648 SV * fh 1015 SV * fh
649 UV offset 1016 UV offset
650 IV length 1017 IV length
651 SV * callback 1018 SV * callback
652 PROTOTYPE: $$$;$ 1019 PROTOTYPE: $$$;$
653 CODE: 1020 PPCODE:
654{ 1021{
655 dREQ; 1022 dREQ;
656 1023
657 req->type = REQ_READAHEAD; 1024 req->type = REQ_READAHEAD;
658 req->fh = newSVsv (fh); 1025 req->fh = newSVsv (fh);
659 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1026 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
660 req->offset = offset; 1027 req->offset = offset;
661 req->length = length; 1028 req->length = length;
662 1029
663 send_req (req); 1030 REQ_SEND;
664} 1031}
665 1032
666void 1033void
667aio_stat(fh_or_path,callback=&PL_sv_undef) 1034aio_stat (fh_or_path,callback=&PL_sv_undef)
668 SV * fh_or_path 1035 SV * fh_or_path
669 SV * callback 1036 SV * callback
670 ALIAS: 1037 ALIAS:
671 aio_stat = REQ_STAT 1038 aio_stat = REQ_STAT
672 aio_lstat = REQ_LSTAT 1039 aio_lstat = REQ_LSTAT
673 CODE: 1040 PPCODE:
674{ 1041{
675 dREQ; 1042 dREQ;
676 1043
677 New (0, req->statdata, 1, Stat_t); 1044 New (0, req->statdata, 1, Stat_t);
678 if (!req->statdata) 1045 if (!req->statdata)
679 { 1046 {
680 free_req (req); 1047 req_free (req);
681 croak ("out of memory during aio_req->statdata allocation"); 1048 croak ("out of memory during aio_req->statdata allocation");
682 } 1049 }
683 1050
684 if (SvPOK (fh_or_path)) 1051 if (SvPOK (fh_or_path))
685 { 1052 {
… …
692 req->type = REQ_FSTAT; 1059 req->type = REQ_FSTAT;
693 req->fh = newSVsv (fh_or_path); 1060 req->fh = newSVsv (fh_or_path);
694 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1061 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
695 } 1062 }
696 1063
697 send_req (req); 1064 REQ_SEND;
698} 1065}
699 1066
700void 1067void
701aio_unlink(pathname,callback=&PL_sv_undef) 1068aio_unlink (pathname,callback=&PL_sv_undef)
702 SV * pathname 1069 SV * pathname
703 SV * callback 1070 SV * callback
704 ALIAS: 1071 ALIAS:
705 aio_unlink = REQ_UNLINK 1072 aio_unlink = REQ_UNLINK
706 aio_rmdir = REQ_RMDIR 1073 aio_rmdir = REQ_RMDIR
1074 aio_readdir = REQ_READDIR
707 CODE: 1075 PPCODE:
708{ 1076{
709 dREQ; 1077 dREQ;
710 1078
711 req->type = ix; 1079 req->type = ix;
712 req->data = newSVsv (pathname); 1080 req->data = newSVsv (pathname);
713 req->dataptr = SvPVbyte_nolen (req->data); 1081 req->dataptr = SvPVbyte_nolen (req->data);
714 1082
715 send_req (req); 1083 REQ_SEND;
716} 1084}
717 1085
718void 1086void
719aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1087aio_link (oldpath,newpath,callback=&PL_sv_undef)
720 SV * oldpath 1088 SV * oldpath
721 SV * newpath 1089 SV * newpath
722 SV * callback 1090 SV * callback
1091 ALIAS:
1092 aio_link = REQ_LINK
1093 aio_symlink = REQ_SYMLINK
1094 aio_rename = REQ_RENAME
723 CODE: 1095 PPCODE:
724{ 1096{
725 dREQ; 1097 dREQ;
726 1098
727 req->type = REQ_SYMLINK; 1099 req->type = ix;
728 req->fh = newSVsv (oldpath); 1100 req->fh = newSVsv (oldpath);
729 req->data2ptr = SvPVbyte_nolen (req->fh); 1101 req->data2ptr = SvPVbyte_nolen (req->fh);
730 req->data = newSVsv (newpath); 1102 req->data = newSVsv (newpath);
731 req->dataptr = SvPVbyte_nolen (req->data); 1103 req->dataptr = SvPVbyte_nolen (req->data);
732 1104
733 send_req (req); 1105 REQ_SEND;
734} 1106}
735 1107
1108#if 0
1109
1110# undocumented, because it does not cancel active requests
736void 1111void
1112cancel_most_requests ()
1113 PROTOTYPE:
1114 CODE:
1115{
1116 aio_req *req;
1117
1118 pthread_mutex_lock (&reqlock);
1119 for (req = reqs; req; req = req->next)
1120 req->flags |= 1;
1121 pthread_mutex_unlock (&reqlock);
1122
1123 pthread_mutex_lock (&reslock);
1124 for (req = ress; req; req = req->next)
1125 req->flags |= 1;
1126 pthread_mutex_unlock (&reslock);
1127}
1128
1129#endif
1130
1131void
737flush() 1132flush ()
738 PROTOTYPE: 1133 PROTOTYPE:
739 CODE: 1134 CODE:
740 while (nreqs) 1135 while (nreqs)
741 { 1136 {
742 poll_wait (); 1137 poll_wait ();
… …
782 CODE: 1177 CODE:
783 RETVAL = nreqs; 1178 RETVAL = nreqs;
784 OUTPUT: 1179 OUTPUT:
785 RETVAL 1180 RETVAL
786 1181
1182MODULE = IO::AIO PACKAGE = IO::AIO::CB
1183
1184void
1185cancel (aio_req_ornot req)
1186 PROTOTYPE:
1187 CODE:
1188 req->cancelled = 1;
1189

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