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/cvs/IO-AIO/AIO.xs
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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.21 by root, Sun Aug 7 03:26:10 2005 UTC vs.
Revision 1.22 by root, Tue Aug 16 22:22:18 2005 UTC

… …
29 29
30enum { 30enum {
31 REQ_QUIT, 31 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 32 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 33 REQ_READ, REQ_WRITE, REQ_READAHEAD,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 34 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 35 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR, REQ_SYMLINK,
37 REQ_SYMLINK,
36}; 38};
37 39
38typedef struct aio_cb { 40typedef struct aio_cb {
39 struct aio_cb *volatile next; 41 struct aio_cb *volatile next;
40 42
… …
45 size_t length; 47 size_t length;
46 ssize_t result; 48 ssize_t result;
47 mode_t mode; /* open */ 49 mode_t mode; /* open */
48 int errorno; 50 int errorno;
49 SV *data, *callback, *fh; 51 SV *data, *callback, *fh;
50 void *dataptr; 52 void *dataptr, *data2ptr;
51 STRLEN dataoffset; 53 STRLEN dataoffset;
52 54
53 Stat_t *statdata; 55 Stat_t *statdata;
54} aio_cb; 56} aio_cb;
55 57
… …
60static int max_outstanding = 1<<30; 62static int max_outstanding = 1<<30;
61static int respipe [2]; 63static int respipe [2];
62 64
63static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
64static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
65static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 68static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66 69
67static volatile aio_req reqs, reqe; /* queue start, queue end */ 70static volatile aio_req reqs, reqe; /* queue start, queue end */
68static volatile aio_req ress, rese; /* queue start, queue end */ 71static volatile aio_req ress, rese; /* queue start, queue end */
69 72
… …
90 pthread_mutex_lock (&reslock); 93 pthread_mutex_lock (&reslock);
91 94
92 { 95 {
93 /* read any signals sent by the worker threads */ 96 /* read any signals sent by the worker threads */
94 char buf [32]; 97 char buf [32];
95 while (read (respipe [0], buf, 32) > 0) 98 while (read (respipe [0], buf, 32) == 32)
96 ; 99 ;
97 } 100 }
98 101
99 req = ress; 102 req = ress;
100 ress = rese = 0; 103 ress = rese = 0;
… …
233 req->type = REQ_QUIT; 236 req->type = REQ_QUIT;
234 237
235 send_req (req); 238 send_req (req);
236} 239}
237 240
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/*****************************************************************************/
238/* work around various missing functions */ 315/* work around various missing functions */
239 316
240#if !HAVE_PREADWRITE 317#if !HAVE_PREADWRITE
241# define pread aio_pread 318# define pread aio_pread
242# define pwrite aio_pwrite 319# define pwrite aio_pwrite
… …
304 381
305 errno = 0; 382 errno = 0;
306} 383}
307#endif 384#endif
308 385
386/*****************************************************************************/
387
309static void * 388static void *
310aio_proc (void *thr_arg) 389aio_proc (void *thr_arg)
311{ 390{
312 aio_req req; 391 aio_req req;
313 int type; 392 int type;
… …
350 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 429 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
351 430
352 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;
353 case REQ_CLOSE: req->result = close (req->fd); break; 432 case REQ_CLOSE: req->result = close (req->fd); break;
354 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;
355 436
356 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 437 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
357 case REQ_FSYNC: req->result = fsync (req->fd); break; 438 case REQ_FSYNC: req->result = fsync (req->fd); break;
358 439
359 case REQ_QUIT: 440 case REQ_QUIT:
… …
388 while (type != REQ_QUIT); 469 while (type != REQ_QUIT);
389 470
390 return 0; 471 return 0;
391} 472}
392 473
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
393MODULE = IO::AIO PACKAGE = IO::AIO 486MODULE = IO::AIO PACKAGE = IO::AIO
394 487
395PROTOTYPES: ENABLE 488PROTOTYPES: ENABLE
396 489
397BOOT: 490BOOT:
… …
402 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 495 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
403 croak ("cannot set result pipe to nonblocking mode"); 496 croak ("cannot set result pipe to nonblocking mode");
404 497
405 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 498 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
406 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);
407} 502}
408 503
409void 504void
410min_parallel(nthreads) 505min_parallel(nthreads)
411 int nthreads 506 int nthreads
412 PROTOTYPE: $ 507 PROTOTYPE: $
413 CODE:
414 while (nthreads > started)
415 start_thread ();
416 508
417void 509void
418max_parallel(nthreads) 510max_parallel(nthreads)
419 int nthreads 511 int nthreads
420 PROTOTYPE: $ 512 PROTOTYPE: $
421 CODE:
422{
423 int cur = started;
424 while (cur > nthreads)
425 {
426 end_thread ();
427 cur--;
428 }
429
430 while (started > nthreads)
431 {
432 poll_wait ();
433 poll_cb ();
434 }
435}
436 513
437int 514int
438max_outstanding(nreqs) 515max_outstanding(nreqs)
439 int nreqs 516 int nreqs
440 PROTOTYPE: $ 517 PROTOTYPE: $
… …
449 int mode 526 int mode
450 SV * callback 527 SV * callback
451 PROTOTYPE: $$$;$ 528 PROTOTYPE: $$$;$
452 CODE: 529 CODE:
453{ 530{
454 aio_req req; 531 dREQ;
455
456 Newz (0, req, 1, aio_cb);
457
458 if (!req)
459 croak ("out of memory during aio_req allocation");
460 532
461 req->type = REQ_OPEN; 533 req->type = REQ_OPEN;
462 req->data = newSVsv (pathname); 534 req->data = newSVsv (pathname);
463 req->dataptr = SvPV_nolen (req->data); 535 req->dataptr = SvPVbyte_nolen (req->data);
464 req->fd = flags; 536 req->fd = flags;
465 req->mode = mode; 537 req->mode = mode;
466 req->callback = SvREFCNT_inc (callback);
467 538
468 send_req (req); 539 send_req (req);
469} 540}
470 541
471void 542void
… …
477 aio_close = REQ_CLOSE 548 aio_close = REQ_CLOSE
478 aio_fsync = REQ_FSYNC 549 aio_fsync = REQ_FSYNC
479 aio_fdatasync = REQ_FDATASYNC 550 aio_fdatasync = REQ_FDATASYNC
480 CODE: 551 CODE:
481{ 552{
482 aio_req req; 553 dREQ;
483
484 Newz (0, req, 1, aio_cb);
485
486 if (!req)
487 croak ("out of memory during aio_req allocation");
488 554
489 req->type = ix; 555 req->type = ix;
490 req->fh = newSVsv (fh); 556 req->fh = newSVsv (fh);
491 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 557 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
492 req->callback = SvREFCNT_inc (callback);
493 558
494 send_req (req); 559 send_req (req);
495} 560}
496 561
497void 562void
… …
534 } 599 }
535 600
536 if (length < 0) 601 if (length < 0)
537 croak ("length must not be negative"); 602 croak ("length must not be negative");
538 603
539 Newz (0, req, 1, aio_cb); 604 {
605 dREQ;
540 606
541 if (!req)
542 croak ("out of memory during aio_req allocation");
543
544 req->type = ix; 607 req->type = ix;
545 req->fh = newSVsv (fh); 608 req->fh = newSVsv (fh);
546 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) 609 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
547 : IoOFP (sv_2io (fh))); 610 : IoOFP (sv_2io (fh)));
548 req->offset = offset; 611 req->offset = offset;
549 req->length = length; 612 req->length = length;
550 req->data = SvREFCNT_inc (data); 613 req->data = SvREFCNT_inc (data);
551 req->dataptr = (char *)svptr + dataoffset; 614 req->dataptr = (char *)svptr + dataoffset;
552 req->callback = SvREFCNT_inc (callback); 615 req->callback = SvREFCNT_inc (callback);
553 616
554 send_req (req); 617 send_req (req);
618 }
555} 619}
556 620
557void 621void
558aio_readahead(fh,offset,length,callback=&PL_sv_undef) 622aio_readahead(fh,offset,length,callback=&PL_sv_undef)
559 SV * fh 623 SV * fh
… …
561 IV length 625 IV length
562 SV * callback 626 SV * callback
563 PROTOTYPE: $$$;$ 627 PROTOTYPE: $$$;$
564 CODE: 628 CODE:
565{ 629{
566 aio_req req; 630 dREQ;
567
568 if (length < 0)
569 croak ("length must not be negative");
570
571 Newz (0, req, 1, aio_cb);
572
573 if (!req)
574 croak ("out of memory during aio_req allocation");
575 631
576 req->type = REQ_READAHEAD; 632 req->type = REQ_READAHEAD;
577 req->fh = newSVsv (fh); 633 req->fh = newSVsv (fh);
578 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 634 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
579 req->offset = offset; 635 req->offset = offset;
580 req->length = length; 636 req->length = length;
581 req->callback = SvREFCNT_inc (callback);
582 637
583 send_req (req); 638 send_req (req);
584} 639}
585 640
586void 641void
… …
590 ALIAS: 645 ALIAS:
591 aio_stat = REQ_STAT 646 aio_stat = REQ_STAT
592 aio_lstat = REQ_LSTAT 647 aio_lstat = REQ_LSTAT
593 CODE: 648 CODE:
594{ 649{
595 aio_req req; 650 dREQ;
596
597 Newz (0, req, 1, aio_cb);
598
599 if (!req)
600 croak ("out of memory during aio_req allocation");
601 651
602 New (0, req->statdata, 1, Stat_t); 652 New (0, req->statdata, 1, Stat_t);
603
604 if (!req->statdata) 653 if (!req->statdata)
605 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)");
606 655
607 if (SvPOK (fh_or_path)) 656 if (SvPOK (fh_or_path))
608 { 657 {
609 req->type = ix; 658 req->type = ix;
610 req->data = newSVsv (fh_or_path); 659 req->data = newSVsv (fh_or_path);
611 req->dataptr = SvPV_nolen (req->data); 660 req->dataptr = SvPVbyte_nolen (req->data);
612 } 661 }
613 else 662 else
614 { 663 {
615 req->type = REQ_FSTAT; 664 req->type = REQ_FSTAT;
616 req->fh = newSVsv (fh_or_path); 665 req->fh = newSVsv (fh_or_path);
617 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 666 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
618 } 667 }
619 668
620 req->callback = SvREFCNT_inc (callback);
621
622 send_req (req); 669 send_req (req);
623} 670}
624 671
625void 672void
626aio_unlink(pathname,callback=&PL_sv_undef) 673aio_unlink(pathname,callback=&PL_sv_undef)
627 SV * pathname 674 SV * pathname
628 SV * callback 675 SV * callback
676 ALIAS:
677 aio_unlink = REQ_UNLINK
678 aio_rmdir = REQ_RMDIR
629 CODE: 679 CODE:
630{ 680{
631 aio_req req; 681 dREQ;
632 682
633 Newz (0, req, 1, aio_cb); 683 req->type = ix;
684 req->data = newSVsv (pathname);
685 req->dataptr = SvPVbyte_nolen (req->data);
634 686
635 if (!req) 687 send_req (req);
636 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;
637 698
638 req->type = REQ_UNLINK; 699 req->type = REQ_SYMLINK;
700 req->fh = newSVsv (oldpath);
701 req->data2ptr = SvPVbyte_nolen (req->fh);
639 req->data = newSVsv (pathname); 702 req->data = newSVsv (newpath);
640 req->dataptr = SvPV_nolen (req->data); 703 req->dataptr = SvPVbyte_nolen (req->data);
641 req->callback = SvREFCNT_inc (callback);
642 704
643 send_req (req); 705 send_req (req);
644} 706}
645 707
646void 708void

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