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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.17 by root, Sun Jul 31 18:45:48 2005 UTC vs.
Revision 1.22 by root, Tue Aug 16 22:22:18 2005 UTC

1#define _REENTRANT 1
2#include <errno.h>
3
1#include "EXTERN.h" 4#include "EXTERN.h"
2#include "perl.h" 5#include "perl.h"
3#include "XSUB.h" 6#include "XSUB.h"
4 7
5#include "autoconf/config.h" 8#include "autoconf/config.h"
… …
26 29
27enum { 30enum {
28 REQ_QUIT, 31 REQ_QUIT,
29 REQ_OPEN, REQ_CLOSE, 32 REQ_OPEN, REQ_CLOSE,
30 REQ_READ, REQ_WRITE, REQ_READAHEAD, 33 REQ_READ, REQ_WRITE, REQ_READAHEAD,
31 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 34 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
32 REQ_FSYNC, REQ_FDATASYNC, 35 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR, REQ_SYMLINK,
37 REQ_SYMLINK,
33}; 38};
34 39
35typedef struct aio_cb { 40typedef struct aio_cb {
36 struct aio_cb *volatile next; 41 struct aio_cb *volatile next;
37 42
… …
42 size_t length; 47 size_t length;
43 ssize_t result; 48 ssize_t result;
44 mode_t mode; /* open */ 49 mode_t mode; /* open */
45 int errorno; 50 int errorno;
46 SV *data, *callback, *fh; 51 SV *data, *callback, *fh;
47 void *dataptr; 52 void *dataptr, *data2ptr;
48 STRLEN dataoffset; 53 STRLEN dataoffset;
49 54
50 Stat_t *statdata; 55 Stat_t *statdata;
51} aio_cb; 56} aio_cb;
52 57
… …
57static int max_outstanding = 1<<30; 62static int max_outstanding = 1<<30;
58static int respipe [2]; 63static int respipe [2];
59 64
60static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
61static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
62static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 68static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
63 69
64static volatile aio_req reqs, reqe; /* queue start, queue end */ 70static volatile aio_req reqs, reqe; /* queue start, queue end */
65static volatile aio_req ress, rese; /* queue start, queue end */ 71static volatile aio_req ress, rese; /* queue start, queue end */
66 72
… …
87 pthread_mutex_lock (&reslock); 93 pthread_mutex_lock (&reslock);
88 94
89 { 95 {
90 /* read any signals sent by the worker threads */ 96 /* read any signals sent by the worker threads */
91 char buf [32]; 97 char buf [32];
92 while (read (respipe [0], buf, 32) > 0) 98 while (read (respipe [0], buf, 32) == 32)
93 ; 99 ;
94 } 100 }
95 101
96 req = ress; 102 req = ress;
97 ress = rese = 0; 103 ress = rese = 0;
… …
230 req->type = REQ_QUIT; 236 req->type = REQ_QUIT;
231 237
232 send_req (req); 238 send_req (req);
233} 239}
234 240
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/*****************************************************************************/
235/* work around various missing functions */ 315/* work around various missing functions */
236 316
237#if !HAVE_PREADWRITE 317#if !HAVE_PREADWRITE
238# define pread aio_pread 318# define pread aio_pread
239# define pwrite aio_pwrite 319# define pwrite aio_pwrite
… …
301 381
302 errno = 0; 382 errno = 0;
303} 383}
304#endif 384#endif
305 385
386/*****************************************************************************/
387
306static void * 388static void *
307aio_proc (void *thr_arg) 389aio_proc (void *thr_arg)
308{ 390{
309 aio_req req; 391 aio_req req;
310 int type; 392 int type;
… …
347 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 429 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
348 430
349 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;
350 case REQ_CLOSE: req->result = close (req->fd); break; 432 case REQ_CLOSE: req->result = close (req->fd); break;
351 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;
352 436
353 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 437 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
354 case REQ_FSYNC: req->result = fsync (req->fd); break; 438 case REQ_FSYNC: req->result = fsync (req->fd); break;
355 439
356 case REQ_QUIT: 440 case REQ_QUIT:
… …
385 while (type != REQ_QUIT); 469 while (type != REQ_QUIT);
386 470
387 return 0; 471 return 0;
388} 472}
389 473
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
390MODULE = IO::AIO PACKAGE = IO::AIO 486MODULE = IO::AIO PACKAGE = IO::AIO
391 487
392PROTOTYPES: ENABLE 488PROTOTYPES: ENABLE
393 489
394BOOT: 490BOOT:
… …
399 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 495 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
400 croak ("cannot set result pipe to nonblocking mode"); 496 croak ("cannot set result pipe to nonblocking mode");
401 497
402 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 498 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
403 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);
404} 502}
405 503
406void 504void
407min_parallel(nthreads) 505min_parallel(nthreads)
408 int nthreads 506 int nthreads
409 PROTOTYPE: $ 507 PROTOTYPE: $
410 CODE:
411 while (nthreads > started)
412 start_thread ();
413 508
414void 509void
415max_parallel(nthreads) 510max_parallel(nthreads)
416 int nthreads 511 int nthreads
417 PROTOTYPE: $ 512 PROTOTYPE: $
418 CODE:
419{
420 int cur = started;
421 while (cur > nthreads)
422 {
423 end_thread ();
424 cur--;
425 }
426
427 while (started > nthreads)
428 {
429 poll_wait ();
430 poll_cb ();
431 }
432}
433 513
434int 514int
435max_outstanding(nreqs) 515max_outstanding(nreqs)
436 int nreqs 516 int nreqs
437 PROTOTYPE: $ 517 PROTOTYPE: $
… …
446 int mode 526 int mode
447 SV * callback 527 SV * callback
448 PROTOTYPE: $$$;$ 528 PROTOTYPE: $$$;$
449 CODE: 529 CODE:
450{ 530{
451 aio_req req; 531 dREQ;
452
453 Newz (0, req, 1, aio_cb);
454
455 if (!req)
456 croak ("out of memory during aio_req allocation");
457 532
458 req->type = REQ_OPEN; 533 req->type = REQ_OPEN;
459 req->data = newSVsv (pathname); 534 req->data = newSVsv (pathname);
460 req->dataptr = SvPV_nolen (req->data); 535 req->dataptr = SvPVbyte_nolen (req->data);
461 req->fd = flags; 536 req->fd = flags;
462 req->mode = mode; 537 req->mode = mode;
463 req->callback = SvREFCNT_inc (callback);
464 538
465 send_req (req); 539 send_req (req);
466} 540}
467 541
468void 542void
… …
474 aio_close = REQ_CLOSE 548 aio_close = REQ_CLOSE
475 aio_fsync = REQ_FSYNC 549 aio_fsync = REQ_FSYNC
476 aio_fdatasync = REQ_FDATASYNC 550 aio_fdatasync = REQ_FDATASYNC
477 CODE: 551 CODE:
478{ 552{
479 aio_req req; 553 dREQ;
480
481 Newz (0, req, 1, aio_cb);
482
483 if (!req)
484 croak ("out of memory during aio_req allocation");
485 554
486 req->type = ix; 555 req->type = ix;
487 req->fh = newSVsv (fh); 556 req->fh = newSVsv (fh);
488 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 557 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
489 req->callback = SvREFCNT_inc (callback);
490 558
491 send_req (req); 559 send_req (req);
492} 560}
493 561
494void 562void
… …
505 PROTOTYPE: $$$$$;$ 573 PROTOTYPE: $$$$$;$
506 CODE: 574 CODE:
507{ 575{
508 aio_req req; 576 aio_req req;
509 STRLEN svlen; 577 STRLEN svlen;
510 char *svptr = SvPV (data, svlen); 578 char *svptr = SvPVbyte (data, svlen);
511 579
512 SvUPGRADE (data, SVt_PV); 580 SvUPGRADE (data, SVt_PV);
513 SvPOK_on (data); 581 SvPOK_on (data);
514 582
515 if (dataoffset < 0) 583 if (dataoffset < 0)
… …
531 } 599 }
532 600
533 if (length < 0) 601 if (length < 0)
534 croak ("length must not be negative"); 602 croak ("length must not be negative");
535 603
536 Newz (0, req, 1, aio_cb); 604 {
605 dREQ;
537 606
538 if (!req)
539 croak ("out of memory during aio_req allocation");
540
541 req->type = ix; 607 req->type = ix;
542 req->fh = newSVsv (fh); 608 req->fh = newSVsv (fh);
543 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) 609 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
544 : IoOFP (sv_2io (fh))); 610 : IoOFP (sv_2io (fh)));
545 req->offset = offset; 611 req->offset = offset;
546 req->length = length; 612 req->length = length;
547 req->data = SvREFCNT_inc (data); 613 req->data = SvREFCNT_inc (data);
548 req->dataptr = (char *)svptr + dataoffset; 614 req->dataptr = (char *)svptr + dataoffset;
549 req->callback = SvREFCNT_inc (callback); 615 req->callback = SvREFCNT_inc (callback);
550 616
551 send_req (req); 617 send_req (req);
618 }
552} 619}
553 620
554void 621void
555aio_readahead(fh,offset,length,callback=&PL_sv_undef) 622aio_readahead(fh,offset,length,callback=&PL_sv_undef)
556 SV * fh 623 SV * fh
… …
558 IV length 625 IV length
559 SV * callback 626 SV * callback
560 PROTOTYPE: $$$;$ 627 PROTOTYPE: $$$;$
561 CODE: 628 CODE:
562{ 629{
563 aio_req req; 630 dREQ;
564
565 if (length < 0)
566 croak ("length must not be negative");
567
568 Newz (0, req, 1, aio_cb);
569
570 if (!req)
571 croak ("out of memory during aio_req allocation");
572 631
573 req->type = REQ_READAHEAD; 632 req->type = REQ_READAHEAD;
574 req->fh = newSVsv (fh); 633 req->fh = newSVsv (fh);
575 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 634 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
576 req->offset = offset; 635 req->offset = offset;
577 req->length = length; 636 req->length = length;
578 req->callback = SvREFCNT_inc (callback);
579 637
580 send_req (req); 638 send_req (req);
581} 639}
582 640
583void 641void
… …
587 ALIAS: 645 ALIAS:
588 aio_stat = REQ_STAT 646 aio_stat = REQ_STAT
589 aio_lstat = REQ_LSTAT 647 aio_lstat = REQ_LSTAT
590 CODE: 648 CODE:
591{ 649{
592 aio_req req; 650 dREQ;
593
594 Newz (0, req, 1, aio_cb);
595
596 if (!req)
597 croak ("out of memory during aio_req allocation");
598 651
599 New (0, req->statdata, 1, Stat_t); 652 New (0, req->statdata, 1, Stat_t);
600
601 if (!req->statdata) 653 if (!req->statdata)
602 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)");
603 655
604 if (SvPOK (fh_or_path)) 656 if (SvPOK (fh_or_path))
605 { 657 {
606 req->type = ix; 658 req->type = ix;
607 req->data = newSVsv (fh_or_path); 659 req->data = newSVsv (fh_or_path);
608 req->dataptr = SvPV_nolen (req->data); 660 req->dataptr = SvPVbyte_nolen (req->data);
609 } 661 }
610 else 662 else
611 { 663 {
612 req->type = REQ_FSTAT; 664 req->type = REQ_FSTAT;
613 req->fh = newSVsv (fh_or_path); 665 req->fh = newSVsv (fh_or_path);
614 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 666 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
615 } 667 }
616 668
617 req->callback = SvREFCNT_inc (callback);
618
619 send_req (req); 669 send_req (req);
620} 670}
621 671
622void 672void
623aio_unlink(pathname,callback=&PL_sv_undef) 673aio_unlink(pathname,callback=&PL_sv_undef)
624 SV * pathname 674 SV * pathname
625 SV * callback 675 SV * callback
676 ALIAS:
677 aio_unlink = REQ_UNLINK
678 aio_rmdir = REQ_RMDIR
626 CODE: 679 CODE:
627{ 680{
628 aio_req req; 681 dREQ;
629 682
630 Newz (0, req, 1, aio_cb); 683 req->type = ix;
684 req->data = newSVsv (pathname);
685 req->dataptr = SvPVbyte_nolen (req->data);
631 686
632 if (!req) 687 send_req (req);
633 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;
634 698
635 req->type = REQ_UNLINK; 699 req->type = REQ_SYMLINK;
700 req->fh = newSVsv (oldpath);
701 req->data2ptr = SvPVbyte_nolen (req->fh);
636 req->data = newSVsv (pathname); 702 req->data = newSVsv (newpath);
637 req->dataptr = SvPV_nolen (req->data); 703 req->dataptr = SvPVbyte_nolen (req->data);
638 req->callback = SvREFCNT_inc (callback);
639 704
640 send_req (req); 705 send_req (req);
641} 706}
642 707
643void 708void

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