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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.19 by root, Sun Jul 31 19:04:45 2005 UTC vs.
Revision 1.23 by root, Tue Aug 16 23:33:34 2005 UTC

1#ifndef _REENTRANT
2# define _REENTRANT 1 1#define _REENTRANT 1
3#endif
4#include <errno.h> 2#include <errno.h>
5 3
6#include "EXTERN.h" 4#include "EXTERN.h"
7#include "perl.h" 5#include "perl.h"
8#include "XSUB.h" 6#include "XSUB.h"
… …
31 29
32enum { 30enum {
33 REQ_QUIT, 31 REQ_QUIT,
34 REQ_OPEN, REQ_CLOSE, 32 REQ_OPEN, REQ_CLOSE,
35 REQ_READ, REQ_WRITE, REQ_READAHEAD, 33 REQ_READ, REQ_WRITE, REQ_READAHEAD,
36 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 34 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
37 REQ_FSYNC, REQ_FDATASYNC, 35 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR,
37 REQ_SYMLINK,
38}; 38};
39 39
40typedef struct aio_cb { 40typedef struct aio_cb {
41 struct aio_cb *volatile next; 41 struct aio_cb *volatile next;
42 42
… …
47 size_t length; 47 size_t length;
48 ssize_t result; 48 ssize_t result;
49 mode_t mode; /* open */ 49 mode_t mode; /* open */
50 int errorno; 50 int errorno;
51 SV *data, *callback, *fh; 51 SV *data, *callback, *fh;
52 void *dataptr; 52 void *dataptr, *data2ptr;
53 STRLEN dataoffset; 53 STRLEN dataoffset;
54 54
55 Stat_t *statdata; 55 Stat_t *statdata;
56} aio_cb; 56} aio_cb;
57 57
… …
62static int max_outstanding = 1<<30; 62static int max_outstanding = 1<<30;
63static int respipe [2]; 63static int respipe [2];
64 64
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 68static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68 69
69static volatile aio_req reqs, reqe; /* queue start, queue end */ 70static volatile aio_req reqs, reqe; /* queue start, queue end */
70static volatile aio_req ress, rese; /* queue start, queue end */ 71static volatile aio_req ress, rese; /* queue start, queue end */
71 72
… …
92 pthread_mutex_lock (&reslock); 93 pthread_mutex_lock (&reslock);
93 94
94 { 95 {
95 /* read any signals sent by the worker threads */ 96 /* read any signals sent by the worker threads */
96 char buf [32]; 97 char buf [32];
97 while (read (respipe [0], buf, 32) > 0) 98 while (read (respipe [0], buf, 32) == 32)
98 ; 99 ;
99 } 100 }
100 101
101 req = ress; 102 req = ress;
102 ress = rese = 0; 103 ress = rese = 0;
… …
235 req->type = REQ_QUIT; 236 req->type = REQ_QUIT;
236 237
237 send_req (req); 238 send_req (req);
238} 239}
239 240
241
242static void min_parallel (int nthreads)
243{
244 while (nthreads > started)
245 start_thread ();
246}
247
248static void max_parallel (int nthreads)
249{
250 int cur = started;
251 while (cur > nthreads)
252 {
253 end_thread ();
254 cur--;
255 }
256
257 while (started > nthreads)
258 {
259 poll_wait ();
260 poll_cb ();
261 }
262}
263
264static int fork_started;
265
266static void atfork_prepare (void)
267{
268 pthread_mutex_lock (&frklock);
269
270 fork_started = started;
271
272 for (;;) {
273 while (nreqs)
274 {
275 poll_wait ();
276 poll_cb ();
277 }
278
279 max_parallel (0);
280
281 pthread_mutex_lock (&reqlock);
282
283 if (!nreqs && !started)
284 break;
285
286 pthread_mutex_unlock (&reqlock);
287
288 min_parallel (fork_started);
289 }
290
291 pthread_mutex_lock (&reslock);
292
293 assert (!started);
294 assert (!nreqs);
295 assert (!reqs && !reqe);
296 assert (!ress && !rese);
297}
298
299static void atfork_parent (void)
300{
301 pthread_mutex_unlock (&reslock);
302 min_parallel (fork_started);
303 pthread_mutex_unlock (&reqlock);
304 pthread_mutex_unlock (&frklock);
305}
306
307static void atfork_child (void)
308{
309 reqs = reqe = 0;
310
311 atfork_parent ();
312}
313
314/*****************************************************************************/
240/* work around various missing functions */ 315/* work around various missing functions */
241 316
242#if !HAVE_PREADWRITE 317#if !HAVE_PREADWRITE
243# define pread aio_pread 318# define pread aio_pread
244# define pwrite aio_pwrite 319# define pwrite aio_pwrite
… …
306 381
307 errno = 0; 382 errno = 0;
308} 383}
309#endif 384#endif
310 385
386/*****************************************************************************/
387
311static void * 388static void *
312aio_proc (void *thr_arg) 389aio_proc (void *thr_arg)
313{ 390{
314 aio_req req; 391 aio_req req;
315 int type; 392 int type;
… …
352 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 429 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
353 430
354 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 431 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
355 case REQ_CLOSE: req->result = close (req->fd); break; 432 case REQ_CLOSE: req->result = close (req->fd); break;
356 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 433 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
435 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
357 436
358 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 437 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
359 case REQ_FSYNC: req->result = fsync (req->fd); break; 438 case REQ_FSYNC: req->result = fsync (req->fd); break;
360 439
361 case REQ_QUIT: 440 case REQ_QUIT:
… …
390 while (type != REQ_QUIT); 469 while (type != REQ_QUIT);
391 470
392 return 0; 471 return 0;
393} 472}
394 473
474#define dREQ \
475 aio_req req; \
476 \
477 if (SvOK (callback) && !SvROK (callback)) \
478 croak ("clalback must be undef or of reference type"); \
479 \
480 Newz (0, req, 1, aio_cb); \
481 if (!req) \
482 croak ("out of memory during aio_req allocation"); \
483 \
484 req->callback = SvREFCNT_inc (callback);
485
395MODULE = IO::AIO PACKAGE = IO::AIO 486MODULE = IO::AIO PACKAGE = IO::AIO
396 487
397PROTOTYPES: ENABLE 488PROTOTYPES: ENABLE
398 489
399BOOT: 490BOOT:
… …
404 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 495 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
405 croak ("cannot set result pipe to nonblocking mode"); 496 croak ("cannot set result pipe to nonblocking mode");
406 497
407 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 498 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
408 croak ("cannot set result pipe to nonblocking mode"); 499 croak ("cannot set result pipe to nonblocking mode");
500
501 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
409} 502}
410 503
411void 504void
412min_parallel(nthreads) 505min_parallel(nthreads)
413 int nthreads 506 int nthreads
414 PROTOTYPE: $ 507 PROTOTYPE: $
415 CODE:
416 while (nthreads > started)
417 start_thread ();
418 508
419void 509void
420max_parallel(nthreads) 510max_parallel(nthreads)
421 int nthreads 511 int nthreads
422 PROTOTYPE: $ 512 PROTOTYPE: $
423 CODE:
424{
425 int cur = started;
426 while (cur > nthreads)
427 {
428 end_thread ();
429 cur--;
430 }
431
432 while (started > nthreads)
433 {
434 poll_wait ();
435 poll_cb ();
436 }
437}
438 513
439int 514int
440max_outstanding(nreqs) 515max_outstanding(nreqs)
441 int nreqs 516 int nreqs
442 PROTOTYPE: $ 517 PROTOTYPE: $
… …
451 int mode 526 int mode
452 SV * callback 527 SV * callback
453 PROTOTYPE: $$$;$ 528 PROTOTYPE: $$$;$
454 CODE: 529 CODE:
455{ 530{
456 aio_req req; 531 dREQ;
457
458 Newz (0, req, 1, aio_cb);
459
460 if (!req)
461 croak ("out of memory during aio_req allocation");
462 532
463 req->type = REQ_OPEN; 533 req->type = REQ_OPEN;
464 req->data = newSVsv (pathname); 534 req->data = newSVsv (pathname);
465 req->dataptr = SvPV_nolen (req->data); 535 req->dataptr = SvPVbyte_nolen (req->data);
466 req->fd = flags; 536 req->fd = flags;
467 req->mode = mode; 537 req->mode = mode;
468 req->callback = SvREFCNT_inc (callback);
469 538
470 send_req (req); 539 send_req (req);
471} 540}
472 541
473void 542void
… …
479 aio_close = REQ_CLOSE 548 aio_close = REQ_CLOSE
480 aio_fsync = REQ_FSYNC 549 aio_fsync = REQ_FSYNC
481 aio_fdatasync = REQ_FDATASYNC 550 aio_fdatasync = REQ_FDATASYNC
482 CODE: 551 CODE:
483{ 552{
484 aio_req req; 553 dREQ;
485
486 Newz (0, req, 1, aio_cb);
487
488 if (!req)
489 croak ("out of memory during aio_req allocation");
490 554
491 req->type = ix; 555 req->type = ix;
492 req->fh = newSVsv (fh); 556 req->fh = newSVsv (fh);
493 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 557 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
494 req->callback = SvREFCNT_inc (callback);
495 558
496 send_req (req); 559 send_req (req);
497} 560}
498 561
499void 562void
… …
510 PROTOTYPE: $$$$$;$ 573 PROTOTYPE: $$$$$;$
511 CODE: 574 CODE:
512{ 575{
513 aio_req req; 576 aio_req req;
514 STRLEN svlen; 577 STRLEN svlen;
515 char *svptr = SvPV (data, svlen); 578 char *svptr = SvPVbyte (data, svlen);
516 579
517 SvUPGRADE (data, SVt_PV); 580 SvUPGRADE (data, SVt_PV);
518 SvPOK_on (data); 581 SvPOK_on (data);
519 582
520 if (dataoffset < 0) 583 if (dataoffset < 0)
… …
536 } 599 }
537 600
538 if (length < 0) 601 if (length < 0)
539 croak ("length must not be negative"); 602 croak ("length must not be negative");
540 603
541 Newz (0, req, 1, aio_cb); 604 {
605 dREQ;
542 606
543 if (!req)
544 croak ("out of memory during aio_req allocation");
545
546 req->type = ix; 607 req->type = ix;
547 req->fh = newSVsv (fh); 608 req->fh = newSVsv (fh);
548 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) 609 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
549 : IoOFP (sv_2io (fh))); 610 : IoOFP (sv_2io (fh)));
550 req->offset = offset; 611 req->offset = offset;
551 req->length = length; 612 req->length = length;
552 req->data = SvREFCNT_inc (data); 613 req->data = SvREFCNT_inc (data);
553 req->dataptr = (char *)svptr + dataoffset; 614 req->dataptr = (char *)svptr + dataoffset;
554 req->callback = SvREFCNT_inc (callback); 615 req->callback = SvREFCNT_inc (callback);
555 616
556 send_req (req); 617 send_req (req);
618 }
557} 619}
558 620
559void 621void
560aio_readahead(fh,offset,length,callback=&PL_sv_undef) 622aio_readahead(fh,offset,length,callback=&PL_sv_undef)
561 SV * fh 623 SV * fh
… …
563 IV length 625 IV length
564 SV * callback 626 SV * callback
565 PROTOTYPE: $$$;$ 627 PROTOTYPE: $$$;$
566 CODE: 628 CODE:
567{ 629{
568 aio_req req; 630 dREQ;
569
570 if (length < 0)
571 croak ("length must not be negative");
572
573 Newz (0, req, 1, aio_cb);
574
575 if (!req)
576 croak ("out of memory during aio_req allocation");
577 631
578 req->type = REQ_READAHEAD; 632 req->type = REQ_READAHEAD;
579 req->fh = newSVsv (fh); 633 req->fh = newSVsv (fh);
580 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 634 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
581 req->offset = offset; 635 req->offset = offset;
582 req->length = length; 636 req->length = length;
583 req->callback = SvREFCNT_inc (callback);
584 637
585 send_req (req); 638 send_req (req);
586} 639}
587 640
588void 641void
… …
592 ALIAS: 645 ALIAS:
593 aio_stat = REQ_STAT 646 aio_stat = REQ_STAT
594 aio_lstat = REQ_LSTAT 647 aio_lstat = REQ_LSTAT
595 CODE: 648 CODE:
596{ 649{
597 aio_req req; 650 dREQ;
598
599 Newz (0, req, 1, aio_cb);
600
601 if (!req)
602 croak ("out of memory during aio_req allocation");
603 651
604 New (0, req->statdata, 1, Stat_t); 652 New (0, req->statdata, 1, Stat_t);
605
606 if (!req->statdata) 653 if (!req->statdata)
607 croak ("out of memory during aio_req->statdata allocation"); 654 croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
608 655
609 if (SvPOK (fh_or_path)) 656 if (SvPOK (fh_or_path))
610 { 657 {
611 req->type = ix; 658 req->type = ix;
612 req->data = newSVsv (fh_or_path); 659 req->data = newSVsv (fh_or_path);
613 req->dataptr = SvPV_nolen (req->data); 660 req->dataptr = SvPVbyte_nolen (req->data);
614 } 661 }
615 else 662 else
616 { 663 {
617 req->type = REQ_FSTAT; 664 req->type = REQ_FSTAT;
618 req->fh = newSVsv (fh_or_path); 665 req->fh = newSVsv (fh_or_path);
619 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 666 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
620 } 667 }
621 668
622 req->callback = SvREFCNT_inc (callback);
623
624 send_req (req); 669 send_req (req);
625} 670}
626 671
627void 672void
628aio_unlink(pathname,callback=&PL_sv_undef) 673aio_unlink(pathname,callback=&PL_sv_undef)
629 SV * pathname 674 SV * pathname
630 SV * callback 675 SV * callback
676 ALIAS:
677 aio_unlink = REQ_UNLINK
678 aio_rmdir = REQ_RMDIR
631 CODE: 679 CODE:
632{ 680{
633 aio_req req; 681 dREQ;
634 682
635 Newz (0, req, 1, aio_cb); 683 req->type = ix;
684 req->data = newSVsv (pathname);
685 req->dataptr = SvPVbyte_nolen (req->data);
636 686
637 if (!req) 687 send_req (req);
638 croak ("out of memory during aio_req allocation"); 688}
689
690void
691aio_symlink(oldpath,newpath,callback=&PL_sv_undef)
692 SV * oldpath
693 SV * newpath
694 SV * callback
695 CODE:
696{
697 dREQ;
639 698
640 req->type = REQ_UNLINK; 699 req->type = REQ_SYMLINK;
700 req->fh = newSVsv (oldpath);
701 req->data2ptr = SvPVbyte_nolen (req->fh);
641 req->data = newSVsv (pathname); 702 req->data = newSVsv (newpath);
642 req->dataptr = SvPV_nolen (req->data); 703 req->dataptr = SvPVbyte_nolen (req->data);
643 req->callback = SvREFCNT_inc (callback);
644 704
645 send_req (req); 705 send_req (req);
646} 706}
647 707
648void 708void

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