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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.18 by root, Sun Jul 31 19:00:31 2005 UTC vs.
Revision 1.27 by root, Wed Aug 17 04:47:02 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"
… …
9 12
10#include <unistd.h> 13#include <unistd.h>
11#include <fcntl.h> 14#include <fcntl.h>
12#include <signal.h> 15#include <signal.h>
13#include <sched.h> 16#include <sched.h>
14
15#ifndef _REENTRANT
16# define _REENTRANT 1
17#endif
18#include <errno.h>
19 17
20#include <pthread.h> 18#include <pthread.h>
21 19
22typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
23typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
… …
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
… …
66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 67static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68 68
69static volatile aio_req reqs, reqe; /* queue start, queue end */ 69static volatile aio_req reqs, reqe; /* queue start, queue end */
70static volatile aio_req ress, rese; /* queue start, queue end */ 70static volatile aio_req ress, rese; /* queue start, queue end */
71
72static void free_req (aio_req req)
73{
74 if (req->data)
75 SvREFCNT_dec (req->data);
76
77 if (req->fh)
78 SvREFCNT_dec (req->fh);
79
80 if (req->statdata)
81 Safefree (req->statdata);
82
83 if (req->callback)
84 SvREFCNT_dec (req->callback);
85
86 Safefree (req);
87}
71 88
72static void 89static void
73poll_wait () 90poll_wait ()
74{ 91{
75 if (nreqs && !ress) 92 if (nreqs && !ress)
… …
85static int 102static int
86poll_cb () 103poll_cb ()
87{ 104{
88 dSP; 105 dSP;
89 int count = 0; 106 int count = 0;
107 int do_croak = 0;
90 aio_req req, prv; 108 aio_req req;
91 109
92 pthread_mutex_lock (&reslock); 110 for (;;)
93
94 {
95 /* read any signals sent by the worker threads */
96 char buf [32];
97 while (read (respipe [0], buf, 32) > 0)
98 ;
99 }
100
101 req = ress;
102 ress = rese = 0;
103
104 pthread_mutex_unlock (&reslock);
105
106 while (req)
107 { 111 {
112 pthread_mutex_lock (&reslock);
113 req = ress;
114
115 if (req)
116 {
117 ress = req->next;
118
119 if (!ress)
120 {
121 rese = 0;
122
123 /* read any signals sent by the worker threads */
124 char buf [32];
125 while (read (respipe [0], buf, 32) == 32)
126 ;
127 }
128 }
129
130 pthread_mutex_unlock (&reslock);
131
132 if (!req)
133 break;
134
108 nreqs--; 135 nreqs--;
109 136
110 if (req->type == REQ_QUIT) 137 if (req->type == REQ_QUIT)
111 started--; 138 started--;
112 else 139 else
113 { 140 {
114 int errorno = errno; 141 int errorno = errno;
115 errno = req->errorno; 142 errno = req->errorno;
116 143
117 if (req->type == REQ_READ) 144 if (req->type == REQ_READ)
118 SvCUR_set (req->data, req->dataoffset 145 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
119 + req->result > 0 ? req->result : 0);
120 146
121 if (req->data) 147 if (req->statdata)
122 SvREFCNT_dec (req->data);
123
124 if (req->fh)
125 SvREFCNT_dec (req->fh);
126
127 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
128 { 148 {
129 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 149 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
130 PL_laststatval = req->result; 150 PL_laststatval = req->result;
131 PL_statcache = *(req->statdata); 151 PL_statcache = *(req->statdata);
132
133 Safefree (req->statdata);
134 } 152 }
135 153
136 ENTER; 154 ENTER;
137 PUSHMARK (SP); 155 PUSHMARK (SP);
138 XPUSHs (sv_2mortal (newSViv (req->result))); 156 XPUSHs (sv_2mortal (newSViv (req->result)));
… …
155 if (SvOK (req->callback)) 173 if (SvOK (req->callback))
156 { 174 {
157 PUTBACK; 175 PUTBACK;
158 call_sv (req->callback, G_VOID | G_EVAL); 176 call_sv (req->callback, G_VOID | G_EVAL);
159 SPAGAIN; 177 SPAGAIN;
178
179 if (SvTRUE (ERRSV))
180 {
181 free_req (req);
182 croak (0);
183 }
160 } 184 }
161 185
162 LEAVE; 186 LEAVE;
163
164 if (req->callback)
165 SvREFCNT_dec (req->callback);
166 187
167 errno = errorno; 188 errno = errorno;
168 count++; 189 count++;
169 } 190 }
170 191
171 prv = req; 192 free_req (req);
172 req = req->next;
173 Safefree (prv);
174
175 /* TODO: croak on errors? */
176 } 193 }
177 194
178 return count; 195 return count;
179} 196}
180 197
… …
218 reqe = reqs = req; 235 reqe = reqs = req;
219 236
220 pthread_cond_signal (&reqwait); 237 pthread_cond_signal (&reqwait);
221 pthread_mutex_unlock (&reqlock); 238 pthread_mutex_unlock (&reqlock);
222 239
223 while (nreqs > max_outstanding) 240 if (nreqs > max_outstanding)
241 for (;;)
242 {
243 poll_cb ();
244
245 if (nreqs <= max_outstanding)
246 break;
247
248 poll_wait ();
249 }
250}
251
252static void
253end_thread (void)
254{
255 aio_req req;
256 Newz (0, req, 1, aio_cb);
257 req->type = REQ_QUIT;
258
259 send_req (req);
260}
261
262static void min_parallel (int nthreads)
263{
264 while (nthreads > started)
265 start_thread ();
266}
267
268static void max_parallel (int nthreads)
269{
270 int cur = started;
271
272 while (cur > nthreads)
273 {
274 end_thread ();
275 cur--;
276 }
277
278 while (started > nthreads)
224 { 279 {
225 poll_wait (); 280 poll_wait ();
226 poll_cb (); 281 poll_cb ();
227 } 282 }
228} 283}
229 284
230static void 285static void create_pipe ()
231end_thread (void)
232{ 286{
233 aio_req req; 287 if (pipe (respipe))
234 New (0, req, 1, aio_cb); 288 croak ("unable to initialize result pipe");
235 req->type = REQ_QUIT;
236 289
237 send_req (req); 290 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
238} 291 croak ("cannot set result pipe to nonblocking mode");
239 292
293 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
294 croak ("cannot set result pipe to nonblocking mode");
295}
296
297static void atfork_prepare (void)
298{
299 for (;;) {
300
301 for (;;)
302 {
303 poll_cb ();
304
305 if (!nreqs)
306 break;
307
308 poll_wait ();
309 }
310
311 pthread_mutex_lock (&reqlock);
312
313 if (!nreqs)
314 break;
315
316 pthread_mutex_unlock (&reqlock);
317 }
318
319 pthread_mutex_lock (&reslock);
320
321 assert (!nreqs && !reqs && !ress);
322}
323
324static void atfork_parent (void)
325{
326 pthread_mutex_unlock (&reslock);
327 pthread_mutex_unlock (&reqlock);
328}
329
330static void atfork_child (void)
331{
332 int restart = started;
333 started = 0;
334
335 atfork_parent ();
336
337 min_parallel (restart);
338}
339
340/*****************************************************************************/
240/* work around various missing functions */ 341/* work around various missing functions */
241 342
242#if !HAVE_PREADWRITE 343#if !HAVE_PREADWRITE
243# define pread aio_pread 344# define pread aio_pread
244# define pwrite aio_pwrite 345# define pwrite aio_pwrite
… …
306 407
307 errno = 0; 408 errno = 0;
308} 409}
309#endif 410#endif
310 411
412/*****************************************************************************/
413
311static void * 414static void *
312aio_proc (void *thr_arg) 415aio_proc (void *thr_arg)
313{ 416{
314 aio_req req; 417 aio_req req;
315 int type; 418 int type;
… …
352 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 455 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
353 456
354 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 457 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
355 case REQ_CLOSE: req->result = close (req->fd); break; 458 case REQ_CLOSE: req->result = close (req->fd); break;
356 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 459 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
460 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
461 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
357 462
358 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 463 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
359 case REQ_FSYNC: req->result = fsync (req->fd); break; 464 case REQ_FSYNC: req->result = fsync (req->fd); break;
360 465
361 case REQ_QUIT: 466 case REQ_QUIT:
… …
390 while (type != REQ_QUIT); 495 while (type != REQ_QUIT);
391 496
392 return 0; 497 return 0;
393} 498}
394 499
500#define dREQ \
501 aio_req req; \
502 \
503 if (SvOK (callback) && !SvROK (callback)) \
504 croak ("clalback must be undef or of reference type"); \
505 \
506 Newz (0, req, 1, aio_cb); \
507 if (!req) \
508 croak ("out of memory during aio_req allocation"); \
509 \
510 req->callback = newSVsv (callback);
511
395MODULE = IO::AIO PACKAGE = IO::AIO 512MODULE = IO::AIO PACKAGE = IO::AIO
396 513
397PROTOTYPES: ENABLE 514PROTOTYPES: ENABLE
398 515
399BOOT: 516BOOT:
400{ 517{
401 if (pipe (respipe)) 518 create_pipe ();
402 croak ("unable to initialize result pipe"); 519 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
403
404 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
405 croak ("cannot set result pipe to nonblocking mode");
406
407 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
408 croak ("cannot set result pipe to nonblocking mode");
409} 520}
410 521
411void 522void
412min_parallel(nthreads) 523min_parallel(nthreads)
413 int nthreads 524 int nthreads
414 PROTOTYPE: $ 525 PROTOTYPE: $
415 CODE:
416 while (nthreads > started)
417 start_thread ();
418 526
419void 527void
420max_parallel(nthreads) 528max_parallel(nthreads)
421 int nthreads 529 int nthreads
422 PROTOTYPE: $ 530 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}
438 531
439int 532int
440max_outstanding(nreqs) 533max_outstanding(nreqs)
441 int nreqs 534 int nreqs
442 PROTOTYPE: $ 535 PROTOTYPE: $
… …
451 int mode 544 int mode
452 SV * callback 545 SV * callback
453 PROTOTYPE: $$$;$ 546 PROTOTYPE: $$$;$
454 CODE: 547 CODE:
455{ 548{
456 aio_req req; 549 dREQ;
457
458 Newz (0, req, 1, aio_cb);
459
460 if (!req)
461 croak ("out of memory during aio_req allocation");
462 550
463 req->type = REQ_OPEN; 551 req->type = REQ_OPEN;
464 req->data = newSVsv (pathname); 552 req->data = newSVsv (pathname);
465 req->dataptr = SvPV_nolen (req->data); 553 req->dataptr = SvPVbyte_nolen (req->data);
466 req->fd = flags; 554 req->fd = flags;
467 req->mode = mode; 555 req->mode = mode;
468 req->callback = SvREFCNT_inc (callback);
469 556
470 send_req (req); 557 send_req (req);
471} 558}
472 559
473void 560void
… …
479 aio_close = REQ_CLOSE 566 aio_close = REQ_CLOSE
480 aio_fsync = REQ_FSYNC 567 aio_fsync = REQ_FSYNC
481 aio_fdatasync = REQ_FDATASYNC 568 aio_fdatasync = REQ_FDATASYNC
482 CODE: 569 CODE:
483{ 570{
484 aio_req req; 571 dREQ;
485
486 Newz (0, req, 1, aio_cb);
487
488 if (!req)
489 croak ("out of memory during aio_req allocation");
490 572
491 req->type = ix; 573 req->type = ix;
492 req->fh = newSVsv (fh); 574 req->fh = newSVsv (fh);
493 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 575 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
494 req->callback = SvREFCNT_inc (callback);
495 576
496 send_req (req); 577 send_req (req);
497} 578}
498 579
499void 580void
… …
510 PROTOTYPE: $$$$$;$ 591 PROTOTYPE: $$$$$;$
511 CODE: 592 CODE:
512{ 593{
513 aio_req req; 594 aio_req req;
514 STRLEN svlen; 595 STRLEN svlen;
515 char *svptr = SvPV (data, svlen); 596 char *svptr = SvPVbyte (data, svlen);
516 597
517 SvUPGRADE (data, SVt_PV); 598 SvUPGRADE (data, SVt_PV);
518 SvPOK_on (data); 599 SvPOK_on (data);
519 600
520 if (dataoffset < 0) 601 if (dataoffset < 0)
… …
536 } 617 }
537 618
538 if (length < 0) 619 if (length < 0)
539 croak ("length must not be negative"); 620 croak ("length must not be negative");
540 621
541 Newz (0, req, 1, aio_cb); 622 {
623 dREQ;
542 624
543 if (!req)
544 croak ("out of memory during aio_req allocation");
545
546 req->type = ix; 625 req->type = ix;
547 req->fh = newSVsv (fh); 626 req->fh = newSVsv (fh);
548 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) 627 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
549 : IoOFP (sv_2io (fh))); 628 : IoOFP (sv_2io (fh)));
550 req->offset = offset; 629 req->offset = offset;
551 req->length = length; 630 req->length = length;
552 req->data = SvREFCNT_inc (data); 631 req->data = SvREFCNT_inc (data);
553 req->dataptr = (char *)svptr + dataoffset; 632 req->dataptr = (char *)svptr + dataoffset;
554 req->callback = SvREFCNT_inc (callback);
555 633
556 send_req (req); 634 send_req (req);
635 }
557} 636}
558 637
559void 638void
560aio_readahead(fh,offset,length,callback=&PL_sv_undef) 639aio_readahead(fh,offset,length,callback=&PL_sv_undef)
561 SV * fh 640 SV * fh
… …
563 IV length 642 IV length
564 SV * callback 643 SV * callback
565 PROTOTYPE: $$$;$ 644 PROTOTYPE: $$$;$
566 CODE: 645 CODE:
567{ 646{
568 aio_req req; 647 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");
577 648
578 req->type = REQ_READAHEAD; 649 req->type = REQ_READAHEAD;
579 req->fh = newSVsv (fh); 650 req->fh = newSVsv (fh);
580 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 651 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
581 req->offset = offset; 652 req->offset = offset;
582 req->length = length; 653 req->length = length;
583 req->callback = SvREFCNT_inc (callback);
584 654
585 send_req (req); 655 send_req (req);
586} 656}
587 657
588void 658void
… …
592 ALIAS: 662 ALIAS:
593 aio_stat = REQ_STAT 663 aio_stat = REQ_STAT
594 aio_lstat = REQ_LSTAT 664 aio_lstat = REQ_LSTAT
595 CODE: 665 CODE:
596{ 666{
597 aio_req req; 667 dREQ;
598
599 Newz (0, req, 1, aio_cb);
600
601 if (!req)
602 croak ("out of memory during aio_req allocation");
603 668
604 New (0, req->statdata, 1, Stat_t); 669 New (0, req->statdata, 1, Stat_t);
605
606 if (!req->statdata) 670 if (!req->statdata)
671 {
672 free_req (req);
607 croak ("out of memory during aio_req->statdata allocation"); 673 croak ("out of memory during aio_req->statdata allocation");
674 }
608 675
609 if (SvPOK (fh_or_path)) 676 if (SvPOK (fh_or_path))
610 { 677 {
611 req->type = ix; 678 req->type = ix;
612 req->data = newSVsv (fh_or_path); 679 req->data = newSVsv (fh_or_path);
613 req->dataptr = SvPV_nolen (req->data); 680 req->dataptr = SvPVbyte_nolen (req->data);
614 } 681 }
615 else 682 else
616 { 683 {
617 req->type = REQ_FSTAT; 684 req->type = REQ_FSTAT;
618 req->fh = newSVsv (fh_or_path); 685 req->fh = newSVsv (fh_or_path);
619 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 686 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
620 } 687 }
621 688
622 req->callback = SvREFCNT_inc (callback);
623
624 send_req (req); 689 send_req (req);
625} 690}
626 691
627void 692void
628aio_unlink(pathname,callback=&PL_sv_undef) 693aio_unlink(pathname,callback=&PL_sv_undef)
629 SV * pathname 694 SV * pathname
630 SV * callback 695 SV * callback
696 ALIAS:
697 aio_unlink = REQ_UNLINK
698 aio_rmdir = REQ_RMDIR
631 CODE: 699 CODE:
632{ 700{
633 aio_req req; 701 dREQ;
634 702
635 Newz (0, req, 1, aio_cb); 703 req->type = ix;
704 req->data = newSVsv (pathname);
705 req->dataptr = SvPVbyte_nolen (req->data);
636 706
637 if (!req) 707 send_req (req);
638 croak ("out of memory during aio_req allocation"); 708}
709
710void
711aio_symlink(oldpath,newpath,callback=&PL_sv_undef)
712 SV * oldpath
713 SV * newpath
714 SV * callback
715 CODE:
716{
717 dREQ;
639 718
640 req->type = REQ_UNLINK; 719 req->type = REQ_SYMLINK;
720 req->fh = newSVsv (oldpath);
721 req->data2ptr = SvPVbyte_nolen (req->fh);
641 req->data = newSVsv (pathname); 722 req->data = newSVsv (newpath);
642 req->dataptr = SvPV_nolen (req->data); 723 req->dataptr = SvPVbyte_nolen (req->data);
643 req->callback = SvREFCNT_inc (callback);
644 724
645 send_req (req); 725 send_req (req);
646} 726}
647 727
648void 728void

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