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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.2 by root, Sun Jul 10 18:16:49 2005 UTC vs.
Revision 1.78 by root, Thu Oct 26 14:35:34 2006 UTC

1#define PERL_NO_GET_CONTEXT 1/* solaris */
2#define _POSIX_PTHREAD_SEMANTICS 1
3
4#if __linux && !defined(_GNU_SOURCE)
5# define _GNU_SOURCE
6#endif
7
8/* just in case */
9#define _REENTRANT 1
10
11#include <errno.h>
2 12
3#include "EXTERN.h" 13#include "EXTERN.h"
4#include "perl.h" 14#include "perl.h"
5#include "XSUB.h" 15#include "XSUB.h"
6 16
17#include "autoconf/config.h"
18
19#include <pthread.h>
20
21#include <stddef.h>
22#include <errno.h>
23#include <sys/time.h>
24#include <sys/select.h>
7#include <sys/types.h> 25#include <sys/types.h>
8#include <sys/stat.h> 26#include <sys/stat.h>
27#include <limits.h>
9#include <unistd.h> 28#include <unistd.h>
10#include <fcntl.h> 29#include <fcntl.h>
11#include <signal.h> 30#include <signal.h>
12#include <sched.h> 31#include <sched.h>
13#include <endian.h>
14 32
15#include <pthread.h> 33#if HAVE_SENDFILE
34# if __linux
35# include <sys/sendfile.h>
36# elif __freebsd
16#include <sys/syscall.h> 37# include <sys/socket.h>
38# include <sys/uio.h>
39# elif __hpux
40# include <sys/socket.h>
41# elif __solaris /* not yet */
42# include <sys/sendfile.h>
43# else
44# error sendfile support requested but not available
45# endif
46#endif
17 47
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 48/* used for struct dirent, AIX doesn't provide it */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49#ifndef NAME_MAX
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 50# define NAME_MAX 4096
51#endif
21 52
22#if __i386 || __amd64 53#ifndef PTHREAD_STACK_MIN
23# define STACKSIZE ( 256 * sizeof (long)) 54/* care for broken platforms, e.g. windows */
55# define PTHREAD_STACK_MIN 16384
56#endif
57
24#elif __ia64 58#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 59# define STACKSIZE 65536
60#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61# define STACKSIZE PTHREAD_STACK_MIN
26#else 62#else
27# define STACKSIZE ( 512 * sizeof (long)) 63# define STACKSIZE 16384
28#endif 64#endif
65
66/* buffer size for various temporary buffers */
67#define AIO_BUFSIZE 65536
68
69#define dBUF \
70 char *aio_buf; \
71 LOCK (wrklock); \
72 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
73 UNLOCK (wrklock); \
74 if (!aio_buf) \
75 return -1;
29 76
30enum { 77enum {
31 REQ_QUIT, 78 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 79 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 80 REQ_READ, REQ_WRITE, REQ_READAHEAD,
81 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 82 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 83 REQ_FSYNC, REQ_FDATASYNC,
84 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
85 REQ_READDIR,
86 REQ_LINK, REQ_SYMLINK,
87 REQ_GROUP, REQ_NOP,
88 REQ_BUSY,
36}; 89};
37 90
91#define AIO_REQ_KLASS "IO::AIO::REQ"
92#define AIO_GRP_KLASS "IO::AIO::GRP"
93
38typedef struct aio_cb { 94typedef struct aio_cb
95{
39 struct aio_cb *next; 96 struct aio_cb *volatile next;
40 97
41 int type; 98 SV *data, *callback;
42 99 SV *fh, *fh2;
43 int fd; 100 void *dataptr, *data2ptr;
101 Stat_t *statdata;
44 off_t offset; 102 off_t offset;
45 size_t length; 103 size_t length;
46 ssize_t result; 104 ssize_t result;
105
106 STRLEN dataoffset;
107 int type;
108 int fd, fd2;
109 int errorno;
47 mode_t mode; /* open */ 110 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 111
53 Stat_t *statdata; 112 unsigned char flags;
113 unsigned char pri;
114
115 SV *self; /* the perl counterpart of this request, if any */
116 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 117} aio_cb;
55 118
119enum {
120 FLAG_CANCELLED = 0x01,
121};
122
56typedef aio_cb *aio_req; 123typedef aio_cb *aio_req;
124typedef aio_cb *aio_req_ornot;
57 125
58static int started; 126enum {
59static int nreqs; 127 PRI_MIN = -4,
128 PRI_MAX = 4,
129
130 DEFAULT_PRI = 0,
131 PRI_BIAS = -PRI_MIN,
132 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
133};
134
135static int next_pri = DEFAULT_PRI + PRI_BIAS;
136
137static unsigned int started, wanted;
138static volatile unsigned int nreqs;
139static volatile unsigned int max_outstanding = 0xffffffff;
60static int reqpipe[2], respipe[2]; 140static int respipe [2];
61 141
62static aio_req qs, qe; /* queue start, queue end */ 142#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
143# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
144#else
145# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
146#endif
147
148#define LOCK(mutex) pthread_mutex_lock (&(mutex))
149#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
150
151/* worker threads management */
152static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
153
154typedef struct worker {
155 /* locked by wrklock */
156 struct worker *prev, *next;
157
158 pthread_t tid;
159
160 /* locked by reslock, reqlock or wrklock */
161 aio_req req; /* currently processed request */
162 void *dbuf;
163 DIR *dirp;
164} worker;
165
166static worker wrk_first = { &wrk_first, &wrk_first, 0 };
167
168static void worker_clear (worker *wrk)
169{
170 if (wrk->dirp)
171 {
172 closedir (wrk->dirp);
173 wrk->dirp = 0;
174 }
175
176 if (wrk->dbuf)
177 {
178 free (wrk->dbuf);
179 wrk->dbuf = 0;
180 }
181}
182
183static void worker_free (worker *wrk)
184{
185 wrk->next->prev = wrk->prev;
186 wrk->prev->next = wrk->next;
187
188 free (wrk);
189}
190
191static pthread_mutex_t reslock = AIO_MUTEX_INIT;
192static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
193static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
194
195/*
196 * a somewhat faster data structure might be nice, but
197 * with 8 priorities this actually needs <20 insns
198 * per shift, the most expensive operation.
199 */
200typedef struct {
201 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
202 int size;
203} reqq;
204
205static reqq req_queue;
206static reqq res_queue;
207
208int reqq_push (reqq *q, aio_req req)
209{
210 int pri = req->pri;
211 req->next = 0;
212
213 if (q->qe[pri])
214 {
215 q->qe[pri]->next = req;
216 q->qe[pri] = req;
217 }
218 else
219 q->qe[pri] = q->qs[pri] = req;
220
221 return q->size++;
222}
223
224aio_req reqq_shift (reqq *q)
225{
226 int pri;
227
228 if (!q->size)
229 return 0;
230
231 --q->size;
232
233 for (pri = NUM_PRI; pri--; )
234 {
235 aio_req req = q->qs[pri];
236
237 if (req)
238 {
239 if (!(q->qs[pri] = req->next))
240 q->qe[pri] = 0;
241
242 return req;
243 }
244 }
245
246 abort ();
247}
248
249static int poll_cb (int max);
250static void req_invoke (aio_req req);
251static void req_free (aio_req req);
252static void req_cancel (aio_req req);
253
254/* must be called at most once */
255static SV *req_sv (aio_req req, const char *klass)
256{
257 if (!req->self)
258 {
259 req->self = (SV *)newHV ();
260 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
261 }
262
263 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
264}
265
266static aio_req SvAIO_REQ (SV *sv)
267{
268 MAGIC *mg;
269
270 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
271 croak ("object of class " AIO_REQ_KLASS " expected");
272
273 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
274
275 return mg ? (aio_req)mg->mg_ptr : 0;
276}
277
278static void aio_grp_feed (aio_req grp)
279{
280 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
281 {
282 int old_len = grp->length;
283
284 if (grp->fh2 && SvOK (grp->fh2))
285 {
286 dSP;
287
288 ENTER;
289 SAVETMPS;
290 PUSHMARK (SP);
291 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
292 PUTBACK;
293 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
294 SPAGAIN;
295 FREETMPS;
296 LEAVE;
297 }
298
299 /* stop if no progress has been made */
300 if (old_len == grp->length)
301 {
302 SvREFCNT_dec (grp->fh2);
303 grp->fh2 = 0;
304 break;
305 }
306 }
307}
308
309static void aio_grp_dec (aio_req grp)
310{
311 --grp->length;
312
313 /* call feeder, if applicable */
314 aio_grp_feed (grp);
315
316 /* finish, if done */
317 if (!grp->length && grp->fd)
318 {
319 req_invoke (grp);
320 req_free (grp);
321 }
322}
323
324static void poll_wait ()
325{
326 fd_set rfd;
327
328 while (nreqs)
329 {
330 int size;
331#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
332 LOCK (reslock);
333#endif
334 size = res_queue.size;
335#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
336 UNLOCK (reslock);
337#endif
338
339 if (size)
340 return;
341
342 FD_ZERO(&rfd);
343 FD_SET(respipe [0], &rfd);
344
345 select (respipe [0] + 1, &rfd, 0, 0, 0);
346 }
347}
348
349static void req_invoke (aio_req req)
350{
351 dSP;
352
353 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
354 {
355 errno = req->errorno;
356
357 ENTER;
358 SAVETMPS;
359 PUSHMARK (SP);
360 EXTEND (SP, 1);
361
362 switch (req->type)
363 {
364 case REQ_READDIR:
365 {
366 SV *rv = &PL_sv_undef;
367
368 if (req->result >= 0)
369 {
370 int i;
371 char *buf = req->data2ptr;
372 AV *av = newAV ();
373
374 av_extend (av, req->result - 1);
375
376 for (i = 0; i < req->result; ++i)
377 {
378 SV *sv = newSVpv (buf, 0);
379
380 av_store (av, i, sv);
381 buf += SvCUR (sv) + 1;
382 }
383
384 rv = sv_2mortal (newRV_noinc ((SV *)av));
385 }
386
387 PUSHs (rv);
388 }
389 break;
390
391 case REQ_OPEN:
392 {
393 /* convert fd to fh */
394 SV *fh;
395
396 PUSHs (sv_2mortal (newSViv (req->result)));
397 PUTBACK;
398 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
399 SPAGAIN;
400
401 fh = SvREFCNT_inc (POPs);
402
403 PUSHMARK (SP);
404 XPUSHs (sv_2mortal (fh));
405 }
406 break;
407
408 case REQ_GROUP:
409 req->fd = 2; /* mark group as finished */
410
411 if (req->data)
412 {
413 int i;
414 AV *av = (AV *)req->data;
415
416 EXTEND (SP, AvFILL (av) + 1);
417 for (i = 0; i <= AvFILL (av); ++i)
418 PUSHs (*av_fetch (av, i, 0));
419 }
420 break;
421
422 case REQ_NOP:
423 case REQ_BUSY:
424 break;
425
426 default:
427 PUSHs (sv_2mortal (newSViv (req->result)));
428 break;
429 }
430
431
432 PUTBACK;
433 call_sv (req->callback, G_VOID | G_EVAL);
434 SPAGAIN;
435
436 FREETMPS;
437 LEAVE;
438 }
439
440 if (req->grp)
441 {
442 aio_req grp = req->grp;
443
444 /* unlink request */
445 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
446 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
447
448 if (grp->grp_first == req)
449 grp->grp_first = req->grp_next;
450
451 aio_grp_dec (grp);
452 }
453
454 if (SvTRUE (ERRSV))
455 {
456 req_free (req);
457 croak (0);
458 }
459}
460
461static void req_free (aio_req req)
462{
463 if (req->self)
464 {
465 sv_unmagic (req->self, PERL_MAGIC_ext);
466 SvREFCNT_dec (req->self);
467 }
468
469 SvREFCNT_dec (req->data);
470 SvREFCNT_dec (req->fh);
471 SvREFCNT_dec (req->fh2);
472 SvREFCNT_dec (req->callback);
473 Safefree (req->statdata);
474
475 if (req->type == REQ_READDIR)
476 free (req->data2ptr);
477
478 Safefree (req);
479}
480
481static void req_cancel_subs (aio_req grp)
482{
483 aio_req sub;
484
485 if (grp->type != REQ_GROUP)
486 return;
487
488 SvREFCNT_dec (grp->fh2);
489 grp->fh2 = 0;
490
491 for (sub = grp->grp_first; sub; sub = sub->grp_next)
492 req_cancel (sub);
493}
494
495static void req_cancel (aio_req req)
496{
497 req->flags |= FLAG_CANCELLED;
498
499 req_cancel_subs (req);
500}
501
502static int poll_cb (int max)
503{
504 dSP;
505 int count = 0;
506 int do_croak = 0;
507 aio_req req;
508
509 for (;;)
510 {
511 while (max <= 0 || count < max)
512 {
513 LOCK (reslock);
514 req = reqq_shift (&res_queue);
515
516 if (req)
517 {
518 if (!res_queue.size)
519 {
520 /* read any signals sent by the worker threads */
521 char buf [32];
522 while (read (respipe [0], buf, 32) == 32)
523 ;
524 }
525 }
526
527 UNLOCK (reslock);
528
529 if (!req)
530 break;
531
532 --nreqs;
533
534 if (req->type == REQ_QUIT)
535 --started;
536 else if (req->type == REQ_GROUP && req->length)
537 {
538 req->fd = 1; /* mark request as delayed */
539 continue;
540 }
541 else
542 {
543 if (req->type == REQ_READ)
544 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
545
546 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
547 SvREADONLY_off (req->data);
548
549 if (req->statdata)
550 {
551 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
552 PL_laststatval = req->result;
553 PL_statcache = *(req->statdata);
554 }
555
556 req_invoke (req);
557
558 count++;
559 }
560
561 req_free (req);
562 }
563
564 if (nreqs <= max_outstanding)
565 break;
566
567 poll_wait ();
568
569 max = 0;
570 }
571
572 return count;
573}
63 574
64static void *aio_proc(void *arg); 575static void *aio_proc(void *arg);
65 576
66static void
67start_thread (void) 577static void start_thread (void)
68{ 578{
69 sigset_t fullsigset, oldsigset; 579 sigset_t fullsigset, oldsigset;
70 pthread_t tid;
71 pthread_attr_t attr; 580 pthread_attr_t attr;
581
582 worker *wrk = calloc (1, sizeof (worker));
583
584 if (!wrk)
585 croak ("unable to allocate worker thread data");
72 586
73 pthread_attr_init (&attr); 587 pthread_attr_init (&attr);
74 pthread_attr_setstacksize (&attr, STACKSIZE); 588 pthread_attr_setstacksize (&attr, STACKSIZE);
75 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 589 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
76 590
77 sigfillset (&fullsigset); 591 sigfillset (&fullsigset);
592
593 LOCK (wrklock);
78 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 594 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79 595
80 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 596 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
597 {
598 wrk->prev = &wrk_first;
599 wrk->next = wrk_first.next;
600 wrk_first.next->prev = wrk;
601 wrk_first.next = wrk;
81 started++; 602 ++started;
603 }
604 else
605 free (wrk);
82 606
83 sigprocmask (SIG_SETMASK, &oldsigset, 0); 607 sigprocmask (SIG_SETMASK, &oldsigset, 0);
608 UNLOCK (wrklock);
84} 609}
85 610
86static void 611static void req_send (aio_req req)
87send_reqs (void)
88{ 612{
89 /* this write is atomic */ 613 while (started < wanted && nreqs >= started)
90 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) 614 start_thread ();
615
616 ++nreqs;
617
618 LOCK (reqlock);
619 reqq_push (&req_queue, req);
620 pthread_cond_signal (&reqwait);
621 UNLOCK (reqlock);
622}
623
624static void end_thread (void)
625{
626 aio_req req;
627
628 Newz (0, req, 1, aio_cb);
629
630 req->type = REQ_QUIT;
631 req->pri = PRI_MAX + PRI_BIAS;
632
633 req_send (req);
634}
635
636static void min_parallel (int nthreads)
637{
638 if (wanted < nthreads)
639 wanted = nthreads;
640}
641
642static void max_parallel (int nthreads)
643{
644 int cur = started;
645
646 if (wanted > nthreads)
647 wanted = nthreads;
648
649 while (cur > wanted)
91 { 650 {
92 qs = qs->next; 651 end_thread ();
93 if (!qs) qe = 0; 652 cur--;
94 } 653 }
95}
96 654
97static void 655 while (started > wanted)
98send_req (aio_req req) 656 {
99{ 657 poll_wait ();
100 nreqs++; 658 poll_cb (0);
101 req->next = 0; 659 }
660}
102 661
662static void create_pipe ()
663{
664 if (pipe (respipe))
665 croak ("unable to initialize result pipe");
666
667 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
668 croak ("cannot set result pipe to nonblocking mode");
669
670 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
671 croak ("cannot set result pipe to nonblocking mode");
672}
673
674/*****************************************************************************/
675/* work around various missing functions */
676
677#if !HAVE_PREADWRITE
678# define pread aio_pread
679# define pwrite aio_pwrite
680
681/*
682 * make our pread/pwrite safe against themselves, but not against
683 * normal read/write by using a mutex. slows down execution a lot,
684 * but that's your problem, not mine.
685 */
686static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
687
688static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
689{
690 ssize_t res;
691 off_t ooffset;
692
693 LOCK (preadwritelock);
694 ooffset = lseek (fd, 0, SEEK_CUR);
695 lseek (fd, offset, SEEK_SET);
696 res = read (fd, buf, count);
697 lseek (fd, ooffset, SEEK_SET);
698 UNLOCK (preadwritelock);
699
700 return res;
701}
702
703static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
704{
705 ssize_t res;
706 off_t ooffset;
707
708 LOCK (preadwritelock);
709 ooffset = lseek (fd, 0, SEEK_CUR);
710 lseek (fd, offset, SEEK_SET);
711 res = write (fd, buf, count);
712 lseek (fd, offset, SEEK_SET);
713 UNLOCK (preadwritelock);
714
715 return res;
716}
717#endif
718
719#if !HAVE_FDATASYNC
720# define fdatasync fsync
721#endif
722
723#if !HAVE_READAHEAD
724# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
725
726static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
727{
728 dBUF;
729
730 while (count > 0)
731 {
732 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
733
734 pread (fd, aio_buf, len, offset);
735 offset += len;
736 count -= len;
737 }
738
739 errno = 0;
740}
741
742#endif
743
744#if !HAVE_READDIR_R
745# define readdir_r aio_readdir_r
746
747static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
748
749static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
750{
751 struct dirent *e;
752 int errorno;
753
754 LOCK (readdirlock);
755
756 e = readdir (dirp);
757 errorno = errno;
758
103 if (qe) 759 if (e)
104 { 760 {
105 qe->next = req; 761 *res = ent;
106 qe = req; 762 strcpy (ent->d_name, e->d_name);
107 } 763 }
108 else 764 else
109 qe = qs = req; 765 *res = 0;
110 766
111 send_reqs (); 767 UNLOCK (readdirlock);
112}
113 768
114static void 769 errno = errorno;
115end_thread (void) 770 return e ? 0 : -1;
771}
772#endif
773
774/* sendfile always needs emulation */
775static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
776{
777 ssize_t res;
778
779 if (!count)
780 return 0;
781
782#if HAVE_SENDFILE
783# if __linux
784 res = sendfile (ofd, ifd, &offset, count);
785
786# elif __freebsd
787 /*
788 * Of course, the freebsd sendfile is a dire hack with no thoughts
789 * wasted on making it similar to other I/O functions.
790 */
791 {
792 off_t sbytes;
793 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
794
795 if (res < 0 && sbytes)
796 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
797 res = sbytes;
798 }
799
800# elif __hpux
801 res = sendfile (ofd, ifd, offset, count, 0, 0);
802
803# elif __solaris
804 {
805 struct sendfilevec vec;
806 size_t sbytes;
807
808 vec.sfv_fd = ifd;
809 vec.sfv_flag = 0;
810 vec.sfv_off = offset;
811 vec.sfv_len = count;
812
813 res = sendfilev (ofd, &vec, 1, &sbytes);
814
815 if (res < 0 && sbytes)
816 res = sbytes;
817 }
818
819# endif
820#else
821 res = -1;
822 errno = ENOSYS;
823#endif
824
825 if (res < 0
826 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
827#if __solaris
828 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
829#endif
830 )
831 )
832 {
833 /* emulate sendfile. this is a major pain in the ass */
834 dBUF;
835
836 res = 0;
837
838 while (count)
839 {
840 ssize_t cnt;
841
842 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
843
844 if (cnt <= 0)
845 {
846 if (cnt && !res) res = -1;
847 break;
848 }
849
850 cnt = write (ofd, aio_buf, cnt);
851
852 if (cnt <= 0)
853 {
854 if (cnt && !res) res = -1;
855 break;
856 }
857
858 offset += cnt;
859 res += cnt;
860 count -= cnt;
861 }
862 }
863
864 return res;
865}
866
867/* read a full directory */
868static void scandir_ (aio_req req, worker *self)
869{
870 DIR *dirp;
871 union
872 {
873 struct dirent d;
874 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
875 } *u;
876 struct dirent *entp;
877 char *name, *names;
878 int memlen = 4096;
879 int memofs = 0;
880 int res = 0;
881 int errorno;
882
883 LOCK (wrklock);
884 self->dirp = dirp = opendir (req->dataptr);
885 self->dbuf = u = malloc (sizeof (*u));
886 req->data2ptr = names = malloc (memlen);
887 UNLOCK (wrklock);
888
889 if (dirp && u && names)
890 for (;;)
891 {
892 errno = 0;
893 readdir_r (dirp, &u->d, &entp);
894
895 if (!entp)
896 break;
897
898 name = entp->d_name;
899
900 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
901 {
902 int len = strlen (name) + 1;
903
904 res++;
905
906 while (memofs + len > memlen)
907 {
908 memlen *= 2;
909 LOCK (wrklock);
910 req->data2ptr = names = realloc (names, memlen);
911 UNLOCK (wrklock);
912
913 if (!names)
914 break;
915 }
916
917 memcpy (names + memofs, name, len);
918 memofs += len;
919 }
920 }
921
922 if (errno)
923 res = -1;
924
925 req->result = res;
926}
927
928/*****************************************************************************/
929
930static void *aio_proc (void *thr_arg)
116{ 931{
117 aio_req req; 932 aio_req req;
118 New (0, req, 1, aio_cb); 933 int type;
119 req->type = REQ_QUIT; 934 worker *self = (worker *)thr_arg;
120 935
121 send_req (req); 936 do
122}
123
124static void
125read_write (pTHX_
126 int dowrite, int fd, off_t offset, size_t length,
127 SV *data, STRLEN dataoffset, SV *callback)
128{
129 aio_req req;
130 STRLEN svlen;
131 char *svptr = SvPV (data, svlen);
132
133 SvUPGRADE (data, SVt_PV);
134 SvPOK_on (data);
135
136 if (dataoffset < 0)
137 dataoffset += svlen;
138
139 if (dataoffset < 0 || dataoffset > svlen)
140 croak ("data offset outside of string");
141
142 if (dowrite)
143 {
144 /* write: check length and adjust. */
145 if (length < 0 || length + dataoffset > svlen)
146 length = svlen - dataoffset;
147 } 937 {
148 else 938 LOCK (reqlock);
149 {
150 /* read: grow scalar as necessary */
151 svptr = SvGROW (data, length + dataoffset);
152 }
153 939
154 if (length < 0) 940 for (;;)
155 croak ("length must not be negative");
156
157 Newz (0, req, 1, aio_cb);
158
159 if (!req)
160 croak ("out of memory during aio_req allocation");
161
162 req->type = dowrite ? REQ_WRITE : REQ_READ;
163 req->fd = fd;
164 req->offset = offset;
165 req->length = length;
166 req->data = SvREFCNT_inc (data);
167 req->dataptr = (char *)svptr + dataoffset;
168 req->callback = SvREFCNT_inc (callback);
169
170 send_req (req);
171}
172
173static void
174poll_wait ()
175{
176 fd_set rfd;
177 FD_ZERO(&rfd);
178 FD_SET(respipe[0], &rfd);
179
180 select (respipe[0] + 1, &rfd, 0, 0, 0);
181}
182
183static int
184poll_cb (pTHX)
185{
186 dSP;
187 int count = 0;
188 aio_req req;
189
190 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))
191 {
192 nreqs--;
193
194 if (req->type == REQ_QUIT)
195 started--;
196 else
197 { 941 {
198 int errorno = errno; 942 self->req = req = reqq_shift (&req_queue);
199 errno = req->errorno;
200 943
201 if (req->type == REQ_READ)
202 SvCUR_set (req->data, req->dataoffset
203 + req->result > 0 ? req->result : 0);
204
205 if (req->data) 944 if (req)
206 SvREFCNT_dec (req->data);
207
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209 { 945 break;
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211 PL_laststatval = req->result;
212 PL_statcache = *(req->statdata);
213 946
214 Safefree (req->statdata); 947 pthread_cond_wait (&reqwait, &reqlock);
215 }
216
217 PUSHMARK (SP);
218 XPUSHs (sv_2mortal (newSViv (req->result)));
219
220 if (req->type == REQ_OPEN)
221 {
222 /* convert fd to fh */
223 SV *fh;
224
225 PUTBACK;
226 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
227 SPAGAIN;
228
229 fh = POPs;
230
231 PUSHMARK (SP);
232 XPUSHs (fh);
233 }
234
235 PUTBACK;
236 call_sv (req->callback, G_VOID | G_EVAL);
237 SPAGAIN;
238
239 if (req->callback)
240 SvREFCNT_dec (req->callback);
241
242 errno = errorno;
243 count++;
244 } 948 }
245 949
246 Safefree (req); 950 UNLOCK (reqlock);
247 } 951
248
249 if (qs)
250 send_reqs ();
251
252 return count;
253}
254
255static void *
256aio_proc (void *thr_arg)
257{
258 aio_req req;
259
260 /* then loop */
261 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
262 {
263 errno = 0; /* strictly unnecessary */ 952 errno = 0; /* strictly unnecessary */
953 type = req->type; /* remember type for QUIT check */
264 954
955 if (!(req->flags & FLAG_CANCELLED))
265 switch (req->type) 956 switch (type)
266 { 957 {
267 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 958 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
268 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 959 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
269#if SYS_readahead 960
270 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 961 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
271#else 962 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
272 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
273#endif
274 963
275 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 964 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
276 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 965 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
277 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 966 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
278 967
279 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 968 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
280 case REQ_CLOSE: req->result = close (req->fd); break; 969 case REQ_CLOSE: req->result = close (req->fd); break;
281 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 970 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
282
283 case REQ_FSYNC: req->result = fsync (req->fd); break; 971 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
972 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
973 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
974 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
975
284 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 976 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
977 case REQ_FSYNC: req->result = fsync (req->fd); break;
978 case REQ_READDIR: scandir_ (req, self); break;
285 979
980 case REQ_BUSY:
981 {
982 struct timeval tv;
983
984 tv.tv_sec = req->fd;
985 tv.tv_usec = req->fd2;
986
987 req->result = select (0, 0, 0, 0, &tv);
988 }
989
990 case REQ_GROUP:
991 case REQ_NOP:
286 case REQ_QUIT: 992 case REQ_QUIT:
287 write (respipe[1], (void *)&req, sizeof (req)); 993 break;
288 return 0;
289 994
290 default: 995 default:
291 req->result = ENOSYS; 996 req->result = ENOSYS;
292 break; 997 break;
293 } 998 }
294 999
295 req->errorno = errno; 1000 req->errorno = errno;
296 write (respipe[1], (void *)&req, sizeof (req)); 1001
1002 LOCK (reslock);
1003
1004 if (!reqq_push (&res_queue, req))
1005 /* write a dummy byte to the pipe so fh becomes ready */
1006 write (respipe [1], &respipe, 1);
1007
1008 self->req = 0;
1009 worker_clear (self);
1010
1011 UNLOCK (reslock);
297 } 1012 }
1013 while (type != REQ_QUIT);
1014
1015 LOCK (wrklock);
1016 worker_free (self);
1017 UNLOCK (wrklock);
298 1018
299 return 0; 1019 return 0;
300} 1020}
301 1021
1022/*****************************************************************************/
1023
1024static void atfork_prepare (void)
1025{
1026 LOCK (wrklock);
1027 LOCK (reqlock);
1028 LOCK (reslock);
1029#if !HAVE_PREADWRITE
1030 LOCK (preadwritelock);
1031#endif
1032#if !HAVE_READDIR_R
1033 LOCK (readdirlock);
1034#endif
1035}
1036
1037static void atfork_parent (void)
1038{
1039#if !HAVE_READDIR_R
1040 UNLOCK (readdirlock);
1041#endif
1042#if !HAVE_PREADWRITE
1043 UNLOCK (preadwritelock);
1044#endif
1045 UNLOCK (reslock);
1046 UNLOCK (reqlock);
1047 UNLOCK (wrklock);
1048}
1049
1050static void atfork_child (void)
1051{
1052 aio_req prv;
1053
1054 while (prv = reqq_shift (&req_queue))
1055 req_free (prv);
1056
1057 while (prv = reqq_shift (&res_queue))
1058 req_free (prv);
1059
1060 while (wrk_first.next != &wrk_first)
1061 {
1062 worker *wrk = wrk_first.next;
1063
1064 if (wrk->req)
1065 req_free (wrk->req);
1066
1067 worker_clear (wrk);
1068 worker_free (wrk);
1069 }
1070
1071 started = 0;
1072 nreqs = 0;
1073
1074 close (respipe [0]);
1075 close (respipe [1]);
1076 create_pipe ();
1077
1078 atfork_parent ();
1079}
1080
1081#define dREQ \
1082 aio_req req; \
1083 int req_pri = next_pri; \
1084 next_pri = DEFAULT_PRI + PRI_BIAS; \
1085 \
1086 if (SvOK (callback) && !SvROK (callback)) \
1087 croak ("callback must be undef or of reference type"); \
1088 \
1089 Newz (0, req, 1, aio_cb); \
1090 if (!req) \
1091 croak ("out of memory during aio_req allocation"); \
1092 \
1093 req->callback = newSVsv (callback); \
1094 req->pri = req_pri
1095
1096#define REQ_SEND \
1097 req_send (req); \
1098 \
1099 if (GIMME_V != G_VOID) \
1100 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1101
302MODULE = IO::AIO PACKAGE = IO::AIO 1102MODULE = IO::AIO PACKAGE = IO::AIO
303 1103
1104PROTOTYPES: ENABLE
1105
304BOOT: 1106BOOT:
305{ 1107{
306 if (pipe (reqpipe) || pipe (respipe)) 1108 HV *stash = gv_stashpv ("IO::AIO", 1);
307 croak ("unable to initialize request or result pipe"); 1109 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1110 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1111 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
308 1112
309 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) 1113 create_pipe ();
310 croak ("cannot set result pipe to nonblocking mode"); 1114 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
311
312 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
313 croak ("cannot set result pipe to nonblocking mode");
314} 1115}
315 1116
316void 1117void
317min_parallel(nthreads) 1118min_parallel (int nthreads)
318 int nthreads 1119 PROTOTYPE: $
1120
1121void
1122max_parallel (int nthreads)
1123 PROTOTYPE: $
1124
1125int
1126max_outstanding (int maxreqs)
319 PROTOTYPE: $ 1127 PROTOTYPE: $
320 CODE: 1128 CODE:
321 while (nthreads > started) 1129 RETVAL = max_outstanding;
322 start_thread (); 1130 max_outstanding = maxreqs;
1131 OUTPUT:
1132 RETVAL
323 1133
324void 1134void
325max_parallel(nthreads)
326 int nthreads
327 PROTOTYPE: $
328 CODE:
329{
330 int cur = started;
331 while (cur > nthreads)
332 {
333 end_thread ();
334 cur--;
335 }
336
337 while (started > nthreads)
338 {
339 poll_wait ();
340 poll_cb (aTHX);
341 }
342}
343
344void
345aio_open(pathname,flags,mode,callback) 1135aio_open (pathname,flags,mode,callback=&PL_sv_undef)
346 SV * pathname 1136 SV * pathname
347 int flags 1137 int flags
348 int mode 1138 int mode
349 SV * callback 1139 SV * callback
350 PROTOTYPE: $$$$ 1140 PROTOTYPE: $$$;$
351 CODE: 1141 PPCODE:
352{ 1142{
353 aio_req req; 1143 dREQ;
354
355 Newz (0, req, 1, aio_cb);
356
357 if (!req)
358 croak ("out of memory during aio_req allocation");
359 1144
360 req->type = REQ_OPEN; 1145 req->type = REQ_OPEN;
361 req->data = newSVsv (pathname); 1146 req->data = newSVsv (pathname);
362 req->dataptr = SvPV_nolen (req->data); 1147 req->dataptr = SvPVbyte_nolen (req->data);
363 req->fd = flags; 1148 req->fd = flags;
364 req->mode = mode; 1149 req->mode = mode;
365 req->callback = SvREFCNT_inc (callback);
366 1150
367 send_req (req); 1151 REQ_SEND;
368} 1152}
369 1153
370void 1154void
371aio_close(fh,callback) 1155aio_close (fh,callback=&PL_sv_undef)
372 InputStream fh 1156 SV * fh
373 SV * callback 1157 SV * callback
374 PROTOTYPE: $$ 1158 PROTOTYPE: $;$
375 ALIAS: 1159 ALIAS:
376 aio_close = REQ_CLOSE 1160 aio_close = REQ_CLOSE
377 aio_fsync = REQ_FSYNC 1161 aio_fsync = REQ_FSYNC
378 aio_fdatasync = REQ_FDATASYNC 1162 aio_fdatasync = REQ_FDATASYNC
379 CODE: 1163 PPCODE:
1164{
1165 dREQ;
1166
1167 req->type = ix;
1168 req->fh = newSVsv (fh);
1169 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1170
1171 REQ_SEND (req);
1172}
1173
1174void
1175aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1176 SV * fh
1177 UV offset
1178 UV length
1179 SV * data
1180 UV dataoffset
1181 SV * callback
1182 ALIAS:
1183 aio_read = REQ_READ
1184 aio_write = REQ_WRITE
1185 PROTOTYPE: $$$$$;$
1186 PPCODE:
380{ 1187{
381 aio_req req; 1188 aio_req req;
1189 STRLEN svlen;
1190 char *svptr = SvPVbyte (data, svlen);
382 1191
383 Newz (0, req, 1, aio_cb); 1192 SvUPGRADE (data, SVt_PV);
1193 SvPOK_on (data);
384 1194
385 if (!req) 1195 if (dataoffset < 0)
386 croak ("out of memory during aio_req allocation"); 1196 dataoffset += svlen;
387 1197
388 req->type = ix; 1198 if (dataoffset < 0 || dataoffset > svlen)
389 req->fd = PerlIO_fileno (fh); 1199 croak ("data offset outside of string");
390 req->callback = SvREFCNT_inc (callback);
391 1200
392 send_req (req); 1201 if (ix == REQ_WRITE)
393} 1202 {
394 1203 /* write: check length and adjust. */
395void 1204 if (length < 0 || length + dataoffset > svlen)
396aio_read(fh,offset,length,data,dataoffset,callback) 1205 length = svlen - dataoffset;
397 InputStream fh 1206 }
398 UV offset 1207 else
399 IV length 1208 {
400 SV * data 1209 /* read: grow scalar as necessary */
401 IV dataoffset 1210 svptr = SvGROW (data, length + dataoffset);
402 SV * callback 1211 }
403 PROTOTYPE: $$$$$$
404 CODE:
405 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407void
408aio_write(fh,offset,length,data,dataoffset,callback)
409 OutputStream fh
410 UV offset
411 IV length
412 SV * data
413 IV dataoffset
414 SV * callback
415 PROTOTYPE: $$$$$$
416 CODE:
417 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
418
419void
420aio_readahead(fh,offset,length,callback)
421 InputStream fh
422 UV offset
423 IV length
424 SV * callback
425 PROTOTYPE: $$$$
426 CODE:
427{
428 aio_req req;
429 1212
430 if (length < 0) 1213 if (length < 0)
431 croak ("length must not be negative"); 1214 croak ("length must not be negative");
432 1215
433 Newz (0, req, 1, aio_cb); 1216 {
1217 dREQ;
434 1218
435 if (!req) 1219 req->type = ix;
436 croak ("out of memory during aio_req allocation"); 1220 req->fh = newSVsv (fh);
1221 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1222 : IoOFP (sv_2io (fh)));
1223 req->offset = offset;
1224 req->length = length;
1225 req->data = SvREFCNT_inc (data);
1226 req->dataptr = (char *)svptr + dataoffset;
1227
1228 if (!SvREADONLY (data))
1229 {
1230 SvREADONLY_on (data);
1231 req->data2ptr = (void *)data;
1232 }
1233
1234 REQ_SEND;
1235 }
1236}
1237
1238void
1239aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1240 SV * out_fh
1241 SV * in_fh
1242 UV in_offset
1243 UV length
1244 SV * callback
1245 PROTOTYPE: $$$$;$
1246 PPCODE:
1247{
1248 dREQ;
1249
1250 req->type = REQ_SENDFILE;
1251 req->fh = newSVsv (out_fh);
1252 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1253 req->fh2 = newSVsv (in_fh);
1254 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1255 req->offset = in_offset;
1256 req->length = length;
1257
1258 REQ_SEND;
1259}
1260
1261void
1262aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1263 SV * fh
1264 UV offset
1265 IV length
1266 SV * callback
1267 PROTOTYPE: $$$;$
1268 PPCODE:
1269{
1270 dREQ;
437 1271
438 req->type = REQ_READAHEAD; 1272 req->type = REQ_READAHEAD;
1273 req->fh = newSVsv (fh);
439 req->fd = PerlIO_fileno (fh); 1274 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
440 req->offset = offset; 1275 req->offset = offset;
441 req->length = length; 1276 req->length = length;
442 req->callback = SvREFCNT_inc (callback);
443 1277
444 send_req (req); 1278 REQ_SEND;
445} 1279}
446 1280
447void 1281void
448aio_stat(fh_or_path,callback) 1282aio_stat (fh_or_path,callback=&PL_sv_undef)
449 SV * fh_or_path 1283 SV * fh_or_path
450 SV * callback 1284 SV * callback
451 PROTOTYPE: $$
452 ALIAS: 1285 ALIAS:
1286 aio_stat = REQ_STAT
453 aio_lstat = 1 1287 aio_lstat = REQ_LSTAT
454 CODE: 1288 PPCODE:
455{ 1289{
456 aio_req req; 1290 dREQ;
457
458 Newz (0, req, 1, aio_cb);
459
460 if (!req)
461 croak ("out of memory during aio_req allocation");
462 1291
463 New (0, req->statdata, 1, Stat_t); 1292 New (0, req->statdata, 1, Stat_t);
464
465 if (!req->statdata) 1293 if (!req->statdata)
1294 {
1295 req_free (req);
466 croak ("out of memory during aio_req->statdata allocation"); 1296 croak ("out of memory during aio_req->statdata allocation");
1297 }
467 1298
468 if (SvPOK (fh_or_path)) 1299 if (SvPOK (fh_or_path))
469 { 1300 {
470 req->type = ix ? REQ_LSTAT : REQ_STAT; 1301 req->type = ix;
471 req->data = newSVsv (fh_or_path); 1302 req->data = newSVsv (fh_or_path);
472 req->dataptr = SvPV_nolen (req->data); 1303 req->dataptr = SvPVbyte_nolen (req->data);
473 } 1304 }
474 else 1305 else
475 { 1306 {
476 req->type = REQ_FSTAT; 1307 req->type = REQ_FSTAT;
1308 req->fh = newSVsv (fh_or_path);
477 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1309 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
478 } 1310 }
479 1311
480 req->callback = SvREFCNT_inc (callback); 1312 REQ_SEND;
481
482 send_req (req);
483} 1313}
484 1314
485void 1315void
486aio_unlink(pathname,callback) 1316aio_unlink (pathname,callback=&PL_sv_undef)
487 SV * pathname 1317 SV * pathname
488 SV * callback 1318 SV * callback
1319 ALIAS:
1320 aio_unlink = REQ_UNLINK
1321 aio_rmdir = REQ_RMDIR
1322 aio_readdir = REQ_READDIR
1323 PPCODE:
1324{
1325 dREQ;
1326
1327 req->type = ix;
1328 req->data = newSVsv (pathname);
1329 req->dataptr = SvPVbyte_nolen (req->data);
1330
1331 REQ_SEND;
1332}
1333
1334void
1335aio_link (oldpath,newpath,callback=&PL_sv_undef)
1336 SV * oldpath
1337 SV * newpath
1338 SV * callback
1339 ALIAS:
1340 aio_link = REQ_LINK
1341 aio_symlink = REQ_SYMLINK
1342 aio_rename = REQ_RENAME
1343 PPCODE:
1344{
1345 dREQ;
1346
1347 req->type = ix;
1348 req->fh = newSVsv (oldpath);
1349 req->data2ptr = SvPVbyte_nolen (req->fh);
1350 req->data = newSVsv (newpath);
1351 req->dataptr = SvPVbyte_nolen (req->data);
1352
1353 REQ_SEND;
1354}
1355
1356void
1357aio_busy (delay,callback=&PL_sv_undef)
1358 double delay
1359 SV * callback
1360 PPCODE:
1361{
1362 dREQ;
1363
1364 req->type = REQ_BUSY;
1365 req->fd = delay < 0. ? 0 : delay;
1366 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1367
1368 REQ_SEND;
1369}
1370
1371void
1372aio_group (callback=&PL_sv_undef)
1373 SV * callback
489 PROTOTYPE: $$ 1374 PROTOTYPE: ;$
1375 PPCODE:
1376{
1377 dREQ;
1378
1379 req->type = REQ_GROUP;
1380 req_send (req);
1381
1382 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1383}
1384
1385void
1386aio_nop (callback=&PL_sv_undef)
1387 SV * callback
1388 PPCODE:
1389{
1390 dREQ;
1391
1392 req->type = REQ_NOP;
1393
1394 REQ_SEND;
1395}
1396
1397void
1398aioreq_pri (int pri = DEFAULT_PRI)
1399 CODE:
1400 if (pri < PRI_MIN) pri = PRI_MIN;
1401 if (pri > PRI_MAX) pri = PRI_MAX;
1402 next_pri = pri + PRI_BIAS;
1403
1404void
1405aioreq_nice (int nice = 0)
1406 CODE:
1407 nice = next_pri - nice;
1408 if (nice < PRI_MIN) nice = PRI_MIN;
1409 if (nice > PRI_MAX) nice = PRI_MAX;
1410 next_pri = nice + PRI_BIAS;
1411
1412void
1413flush ()
1414 PROTOTYPE:
490 CODE: 1415 CODE:
491{ 1416 while (nreqs)
492 aio_req req; 1417 {
493 1418 poll_wait ();
494 Newz (0, req, 1, aio_cb); 1419 poll_cb (0);
495 1420 }
496 if (!req) 1421
497 croak ("out of memory during aio_req allocation"); 1422void
498 1423poll()
499 req->type = REQ_UNLINK; 1424 PROTOTYPE:
500 req->data = newSVsv (pathname); 1425 CODE:
501 req->dataptr = SvPV_nolen (req->data); 1426 if (nreqs)
502 req->callback = SvREFCNT_inc (callback); 1427 {
503 1428 poll_wait ();
504 send_req (req); 1429 poll_cb (0);
505} 1430 }
506 1431
507int 1432int
508poll_fileno() 1433poll_fileno()
509 PROTOTYPE: 1434 PROTOTYPE:
510 CODE: 1435 CODE:
511 RETVAL = respipe[0]; 1436 RETVAL = respipe [0];
512 OUTPUT: 1437 OUTPUT:
513 RETVAL 1438 RETVAL
514 1439
515int 1440int
516poll_cb(...) 1441poll_cb(...)
517 PROTOTYPE: 1442 PROTOTYPE:
518 CODE: 1443 CODE:
1444 RETVAL = poll_cb (0);
1445 OUTPUT:
1446 RETVAL
1447
1448int
1449poll_some(int max = 0)
1450 PROTOTYPE: $
1451 CODE:
519 RETVAL = poll_cb (aTHX); 1452 RETVAL = poll_cb (max);
520 OUTPUT: 1453 OUTPUT:
521 RETVAL 1454 RETVAL
522 1455
523void 1456void
524poll_wait() 1457poll_wait()
525 PROTOTYPE: 1458 PROTOTYPE:
526 CODE: 1459 CODE:
1460 if (nreqs)
527 poll_wait (); 1461 poll_wait ();
528 1462
529int 1463int
530nreqs() 1464nreqs()
531 PROTOTYPE: 1465 PROTOTYPE:
532 CODE: 1466 CODE:
533 RETVAL = nreqs; 1467 RETVAL = nreqs;
534 OUTPUT: 1468 OUTPUT:
535 RETVAL 1469 RETVAL
536 1470
1471PROTOTYPES: DISABLE
1472
1473MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1474
1475void
1476cancel (aio_req_ornot req)
1477 CODE:
1478 req_cancel (req);
1479
1480void
1481cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1482 CODE:
1483 SvREFCNT_dec (req->callback);
1484 req->callback = newSVsv (callback);
1485
1486MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1487
1488void
1489add (aio_req grp, ...)
1490 PPCODE:
1491{
1492 int i;
1493 aio_req req;
1494
1495 if (grp->fd == 2)
1496 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1497
1498 for (i = 1; i < items; ++i )
1499 {
1500 if (GIMME_V != G_VOID)
1501 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1502
1503 req = SvAIO_REQ (ST (i));
1504
1505 if (req)
1506 {
1507 ++grp->length;
1508 req->grp = grp;
1509
1510 req->grp_prev = 0;
1511 req->grp_next = grp->grp_first;
1512
1513 if (grp->grp_first)
1514 grp->grp_first->grp_prev = req;
1515
1516 grp->grp_first = req;
1517 }
1518 }
1519}
1520
1521void
1522cancel_subs (aio_req_ornot req)
1523 CODE:
1524 req_cancel_subs (req);
1525
1526void
1527result (aio_req grp, ...)
1528 CODE:
1529{
1530 int i;
1531 AV *av = newAV ();
1532
1533 for (i = 1; i < items; ++i )
1534 av_push (av, newSVsv (ST (i)));
1535
1536 SvREFCNT_dec (grp->data);
1537 grp->data = (SV *)av;
1538}
1539
1540void
1541limit (aio_req grp, int limit)
1542 CODE:
1543 grp->fd2 = limit;
1544 aio_grp_feed (grp);
1545
1546void
1547feed (aio_req grp, SV *callback=&PL_sv_undef)
1548 CODE:
1549{
1550 SvREFCNT_dec (grp->fh2);
1551 grp->fh2 = newSVsv (callback);
1552
1553 if (grp->fd2 <= 0)
1554 grp->fd2 = 2;
1555
1556 aio_grp_feed (grp);
1557}
1558

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