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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.1 by root, Sun Jul 10 17:07:44 2005 UTC vs.
Revision 1.79 by root, Thu Oct 26 16:28:33 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/* wether word reads are potentially non-atomic.
67 * this is conservatice, likely most arches this runs
68 * on have atomic word read/writes.
69 */
70#ifndef WORDREAD_UNSAFE
71# if __i386 || __x86_64
72# define WORDREAD_UNSAFE 0
73# else
74# define WORDREAD_UNSAFE 1
75# endif
76#endif
77
78/* buffer size for various temporary buffers */
79#define AIO_BUFSIZE 65536
80
81#define dBUF \
82 char *aio_buf; \
83 LOCK (wrklock); \
84 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
85 UNLOCK (wrklock); \
86 if (!aio_buf) \
87 return -1;
29 88
30enum { 89enum {
31 REQ_QUIT, 90 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 91 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 92 REQ_READ, REQ_WRITE, REQ_READAHEAD,
93 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 94 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 95 REQ_FSYNC, REQ_FDATASYNC,
96 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
97 REQ_READDIR,
98 REQ_LINK, REQ_SYMLINK,
99 REQ_GROUP, REQ_NOP,
100 REQ_BUSY,
36}; 101};
37 102
103#define AIO_REQ_KLASS "IO::AIO::REQ"
104#define AIO_GRP_KLASS "IO::AIO::GRP"
105
38typedef struct aio_cb { 106typedef struct aio_cb
107{
39 struct aio_cb *next; 108 struct aio_cb *volatile next;
40 109
41 int type; 110 SV *data, *callback;
42 111 SV *fh, *fh2;
43 int fd; 112 void *dataptr, *data2ptr;
113 Stat_t *statdata;
44 off_t offset; 114 off_t offset;
45 size_t length; 115 size_t length;
46 ssize_t result; 116 ssize_t result;
117
118 STRLEN dataoffset;
119 int type;
120 int fd, fd2;
121 int errorno;
47 mode_t mode; /* open */ 122 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 123
53 Stat_t *statdata; 124 unsigned char flags;
125 unsigned char pri;
126
127 SV *self; /* the perl counterpart of this request, if any */
128 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 129} aio_cb;
55 130
131enum {
132 FLAG_CANCELLED = 0x01,
133};
134
56typedef aio_cb *aio_req; 135typedef aio_cb *aio_req;
136typedef aio_cb *aio_req_ornot;
57 137
58static int started; 138enum {
59static int nreqs; 139 PRI_MIN = -4,
140 PRI_MAX = 4,
141
142 DEFAULT_PRI = 0,
143 PRI_BIAS = -PRI_MIN,
144 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
145};
146
147static int next_pri = DEFAULT_PRI + PRI_BIAS;
148
149static unsigned int started, wanted;
150static volatile unsigned int nreqs, nready, npending;
151static volatile unsigned int max_outstanding = 0xffffffff;
60static int reqpipe[2], respipe[2]; 152static int respipe [2];
61 153
62static aio_req qs, qe; /* queue start, queue end */ 154#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
155# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
156#else
157# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
158#endif
159
160#define LOCK(mutex) pthread_mutex_lock (&(mutex))
161#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
162
163/* worker threads management */
164static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
165
166typedef struct worker {
167 /* locked by wrklock */
168 struct worker *prev, *next;
169
170 pthread_t tid;
171
172 /* locked by reslock, reqlock or wrklock */
173 aio_req req; /* currently processed request */
174 void *dbuf;
175 DIR *dirp;
176} worker;
177
178static worker wrk_first = { &wrk_first, &wrk_first, 0 };
179
180static void worker_clear (worker *wrk)
181{
182 if (wrk->dirp)
183 {
184 closedir (wrk->dirp);
185 wrk->dirp = 0;
186 }
187
188 if (wrk->dbuf)
189 {
190 free (wrk->dbuf);
191 wrk->dbuf = 0;
192 }
193}
194
195static void worker_free (worker *wrk)
196{
197 wrk->next->prev = wrk->prev;
198 wrk->prev->next = wrk->next;
199
200 free (wrk);
201}
202
203static pthread_mutex_t reslock = AIO_MUTEX_INIT;
204static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
205static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
206
207/*
208 * a somewhat faster data structure might be nice, but
209 * with 8 priorities this actually needs <20 insns
210 * per shift, the most expensive operation.
211 */
212typedef struct {
213 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
214 int size;
215} reqq;
216
217static reqq req_queue;
218static reqq res_queue;
219
220int reqq_push (reqq *q, aio_req req)
221{
222 int pri = req->pri;
223 req->next = 0;
224
225 if (q->qe[pri])
226 {
227 q->qe[pri]->next = req;
228 q->qe[pri] = req;
229 }
230 else
231 q->qe[pri] = q->qs[pri] = req;
232
233 return q->size++;
234}
235
236aio_req reqq_shift (reqq *q)
237{
238 int pri;
239
240 if (!q->size)
241 return 0;
242
243 --q->size;
244
245 for (pri = NUM_PRI; pri--; )
246 {
247 aio_req req = q->qs[pri];
248
249 if (req)
250 {
251 if (!(q->qs[pri] = req->next))
252 q->qe[pri] = 0;
253
254 return req;
255 }
256 }
257
258 abort ();
259}
260
261static int poll_cb (int max);
262static void req_invoke (aio_req req);
263static void req_free (aio_req req);
264static void req_cancel (aio_req req);
265
266/* must be called at most once */
267static SV *req_sv (aio_req req, const char *klass)
268{
269 if (!req->self)
270 {
271 req->self = (SV *)newHV ();
272 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
273 }
274
275 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
276}
277
278static aio_req SvAIO_REQ (SV *sv)
279{
280 MAGIC *mg;
281
282 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
283 croak ("object of class " AIO_REQ_KLASS " expected");
284
285 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
286
287 return mg ? (aio_req)mg->mg_ptr : 0;
288}
289
290static void aio_grp_feed (aio_req grp)
291{
292 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
293 {
294 int old_len = grp->length;
295
296 if (grp->fh2 && SvOK (grp->fh2))
297 {
298 dSP;
299
300 ENTER;
301 SAVETMPS;
302 PUSHMARK (SP);
303 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
304 PUTBACK;
305 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
306 SPAGAIN;
307 FREETMPS;
308 LEAVE;
309 }
310
311 /* stop if no progress has been made */
312 if (old_len == grp->length)
313 {
314 SvREFCNT_dec (grp->fh2);
315 grp->fh2 = 0;
316 break;
317 }
318 }
319}
320
321static void aio_grp_dec (aio_req grp)
322{
323 --grp->length;
324
325 /* call feeder, if applicable */
326 aio_grp_feed (grp);
327
328 /* finish, if done */
329 if (!grp->length && grp->fd)
330 {
331 req_invoke (grp);
332 req_free (grp);
333 }
334}
335
336static void poll_wait ()
337{
338 fd_set rfd;
339
340 while (nreqs)
341 {
342 int size;
343 if (WORDREAD_UNSAFE) LOCK (reslock);
344 size = res_queue.size;
345 if (WORDREAD_UNSAFE) UNLOCK (reslock);
346
347 if (size)
348 return;
349
350 FD_ZERO(&rfd);
351 FD_SET(respipe [0], &rfd);
352
353 select (respipe [0] + 1, &rfd, 0, 0, 0);
354 }
355}
356
357static void req_invoke (aio_req req)
358{
359 dSP;
360
361 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
362 {
363 ENTER;
364 SAVETMPS;
365 PUSHMARK (SP);
366 EXTEND (SP, 1);
367
368 switch (req->type)
369 {
370 case REQ_READDIR:
371 {
372 SV *rv = &PL_sv_undef;
373
374 if (req->result >= 0)
375 {
376 int i;
377 char *buf = req->data2ptr;
378 AV *av = newAV ();
379
380 av_extend (av, req->result - 1);
381
382 for (i = 0; i < req->result; ++i)
383 {
384 SV *sv = newSVpv (buf, 0);
385
386 av_store (av, i, sv);
387 buf += SvCUR (sv) + 1;
388 }
389
390 rv = sv_2mortal (newRV_noinc ((SV *)av));
391 }
392
393 PUSHs (rv);
394 }
395 break;
396
397 case REQ_OPEN:
398 {
399 /* convert fd to fh */
400 SV *fh;
401
402 PUSHs (sv_2mortal (newSViv (req->result)));
403 PUTBACK;
404 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
405 SPAGAIN;
406
407 fh = SvREFCNT_inc (POPs);
408
409 PUSHMARK (SP);
410 XPUSHs (sv_2mortal (fh));
411 }
412 break;
413
414 case REQ_GROUP:
415 req->fd = 2; /* mark group as finished */
416
417 if (req->data)
418 {
419 int i;
420 AV *av = (AV *)req->data;
421
422 EXTEND (SP, AvFILL (av) + 1);
423 for (i = 0; i <= AvFILL (av); ++i)
424 PUSHs (*av_fetch (av, i, 0));
425 }
426 break;
427
428 case REQ_NOP:
429 case REQ_BUSY:
430 break;
431
432 default:
433 PUSHs (sv_2mortal (newSViv (req->result)));
434 break;
435 }
436
437 errno = req->errorno;
438
439 PUTBACK;
440 call_sv (req->callback, G_VOID | G_EVAL);
441 SPAGAIN;
442
443 FREETMPS;
444 LEAVE;
445 }
446
447 if (req->grp)
448 {
449 aio_req grp = req->grp;
450
451 /* unlink request */
452 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
453 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
454
455 if (grp->grp_first == req)
456 grp->grp_first = req->grp_next;
457
458 aio_grp_dec (grp);
459 }
460
461 if (SvTRUE (ERRSV))
462 {
463 req_free (req);
464 croak (0);
465 }
466}
467
468static void req_free (aio_req req)
469{
470 if (req->self)
471 {
472 sv_unmagic (req->self, PERL_MAGIC_ext);
473 SvREFCNT_dec (req->self);
474 }
475
476 SvREFCNT_dec (req->data);
477 SvREFCNT_dec (req->fh);
478 SvREFCNT_dec (req->fh2);
479 SvREFCNT_dec (req->callback);
480 Safefree (req->statdata);
481
482 if (req->type == REQ_READDIR)
483 free (req->data2ptr);
484
485 Safefree (req);
486}
487
488static void req_cancel_subs (aio_req grp)
489{
490 aio_req sub;
491
492 if (grp->type != REQ_GROUP)
493 return;
494
495 SvREFCNT_dec (grp->fh2);
496 grp->fh2 = 0;
497
498 for (sub = grp->grp_first; sub; sub = sub->grp_next)
499 req_cancel (sub);
500}
501
502static void req_cancel (aio_req req)
503{
504 req->flags |= FLAG_CANCELLED;
505
506 req_cancel_subs (req);
507}
508
509static int poll_cb (int max)
510{
511 dSP;
512 int count = 0;
513 int do_croak = 0;
514 aio_req req;
515
516 for (;;)
517 {
518 while (max <= 0 || count < max)
519 {
520 LOCK (reslock);
521 req = reqq_shift (&res_queue);
522
523 if (req)
524 {
525 --npending;
526
527 if (!res_queue.size)
528 {
529 /* read any signals sent by the worker threads */
530 char buf [32];
531 while (read (respipe [0], buf, 32) == 32)
532 ;
533 }
534 }
535
536 UNLOCK (reslock);
537
538 if (!req)
539 break;
540
541 --nreqs;
542
543 if (req->type == REQ_QUIT)
544 --started;
545 else if (req->type == REQ_GROUP && req->length)
546 {
547 req->fd = 1; /* mark request as delayed */
548 continue;
549 }
550 else
551 {
552 if (req->type == REQ_READ)
553 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
554
555 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
556 SvREADONLY_off (req->data);
557
558 if (req->statdata)
559 {
560 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
561 PL_laststatval = req->result;
562 PL_statcache = *(req->statdata);
563 }
564
565 req_invoke (req);
566
567 count++;
568 }
569
570 req_free (req);
571 }
572
573 if (nreqs <= max_outstanding)
574 break;
575
576 poll_wait ();
577
578 max = 0;
579 }
580
581 return count;
582}
63 583
64static void *aio_proc(void *arg); 584static void *aio_proc(void *arg);
65 585
66static void
67start_thread (void) 586static void start_thread (void)
68{ 587{
69 sigset_t fullsigset, oldsigset; 588 sigset_t fullsigset, oldsigset;
70 pthread_t tid;
71 pthread_attr_t attr; 589 pthread_attr_t attr;
590
591 worker *wrk = calloc (1, sizeof (worker));
592
593 if (!wrk)
594 croak ("unable to allocate worker thread data");
72 595
73 pthread_attr_init (&attr); 596 pthread_attr_init (&attr);
74 pthread_attr_setstacksize (&attr, STACKSIZE); 597 pthread_attr_setstacksize (&attr, STACKSIZE);
75 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 598 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
76 599
77 sigfillset (&fullsigset); 600 sigfillset (&fullsigset);
601
602 LOCK (wrklock);
78 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 603 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79 604
80 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 605 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
606 {
607 wrk->prev = &wrk_first;
608 wrk->next = wrk_first.next;
609 wrk_first.next->prev = wrk;
610 wrk_first.next = wrk;
81 started++; 611 ++started;
612 }
613 else
614 free (wrk);
82 615
83 sigprocmask (SIG_SETMASK, &oldsigset, 0); 616 sigprocmask (SIG_SETMASK, &oldsigset, 0);
617 UNLOCK (wrklock);
84} 618}
85 619
86static void 620static void req_send (aio_req req)
87send_reqs (void)
88{ 621{
89 /* this write is atomic */ 622 while (started < wanted && nreqs >= started)
90 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) 623 start_thread ();
624
625 ++nreqs;
626
627 LOCK (reqlock);
628 ++nready;
629 reqq_push (&req_queue, req);
630 pthread_cond_signal (&reqwait);
631 UNLOCK (reqlock);
632}
633
634static void end_thread (void)
635{
636 aio_req req;
637
638 Newz (0, req, 1, aio_cb);
639
640 req->type = REQ_QUIT;
641 req->pri = PRI_MAX + PRI_BIAS;
642
643 req_send (req);
644}
645
646static void min_parallel (int nthreads)
647{
648 if (wanted < nthreads)
649 wanted = nthreads;
650}
651
652static void max_parallel (int nthreads)
653{
654 int cur = started;
655
656 if (wanted > nthreads)
657 wanted = nthreads;
658
659 while (cur > wanted)
91 { 660 {
92 qs = qs->next; 661 end_thread ();
93 if (!qs) qe = 0; 662 cur--;
94 } 663 }
95}
96 664
97static void 665 while (started > wanted)
98send_req (aio_req req) 666 {
99{ 667 poll_wait ();
100 nreqs++; 668 poll_cb (0);
101 req->next = 0; 669 }
670}
102 671
672static void create_pipe ()
673{
674 if (pipe (respipe))
675 croak ("unable to initialize result pipe");
676
677 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
678 croak ("cannot set result pipe to nonblocking mode");
679
680 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
681 croak ("cannot set result pipe to nonblocking mode");
682}
683
684/*****************************************************************************/
685/* work around various missing functions */
686
687#if !HAVE_PREADWRITE
688# define pread aio_pread
689# define pwrite aio_pwrite
690
691/*
692 * make our pread/pwrite safe against themselves, but not against
693 * normal read/write by using a mutex. slows down execution a lot,
694 * but that's your problem, not mine.
695 */
696static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
697
698static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
699{
700 ssize_t res;
701 off_t ooffset;
702
703 LOCK (preadwritelock);
704 ooffset = lseek (fd, 0, SEEK_CUR);
705 lseek (fd, offset, SEEK_SET);
706 res = read (fd, buf, count);
707 lseek (fd, ooffset, SEEK_SET);
708 UNLOCK (preadwritelock);
709
710 return res;
711}
712
713static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
714{
715 ssize_t res;
716 off_t ooffset;
717
718 LOCK (preadwritelock);
719 ooffset = lseek (fd, 0, SEEK_CUR);
720 lseek (fd, offset, SEEK_SET);
721 res = write (fd, buf, count);
722 lseek (fd, offset, SEEK_SET);
723 UNLOCK (preadwritelock);
724
725 return res;
726}
727#endif
728
729#if !HAVE_FDATASYNC
730# define fdatasync fsync
731#endif
732
733#if !HAVE_READAHEAD
734# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
735
736static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
737{
738 dBUF;
739
740 while (count > 0)
741 {
742 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
743
744 pread (fd, aio_buf, len, offset);
745 offset += len;
746 count -= len;
747 }
748
749 errno = 0;
750}
751
752#endif
753
754#if !HAVE_READDIR_R
755# define readdir_r aio_readdir_r
756
757static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
758
759static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
760{
761 struct dirent *e;
762 int errorno;
763
764 LOCK (readdirlock);
765
766 e = readdir (dirp);
767 errorno = errno;
768
103 if (qe) 769 if (e)
104 { 770 {
105 qe->next = req; 771 *res = ent;
106 qe = req; 772 strcpy (ent->d_name, e->d_name);
107 } 773 }
108 else 774 else
109 qe = qs = req; 775 *res = 0;
110 776
111 send_reqs (); 777 UNLOCK (readdirlock);
112}
113 778
114static void 779 errno = errorno;
115end_thread (void) 780 return e ? 0 : -1;
781}
782#endif
783
784/* sendfile always needs emulation */
785static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
786{
787 ssize_t res;
788
789 if (!count)
790 return 0;
791
792#if HAVE_SENDFILE
793# if __linux
794 res = sendfile (ofd, ifd, &offset, count);
795
796# elif __freebsd
797 /*
798 * Of course, the freebsd sendfile is a dire hack with no thoughts
799 * wasted on making it similar to other I/O functions.
800 */
801 {
802 off_t sbytes;
803 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
804
805 if (res < 0 && sbytes)
806 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
807 res = sbytes;
808 }
809
810# elif __hpux
811 res = sendfile (ofd, ifd, offset, count, 0, 0);
812
813# elif __solaris
814 {
815 struct sendfilevec vec;
816 size_t sbytes;
817
818 vec.sfv_fd = ifd;
819 vec.sfv_flag = 0;
820 vec.sfv_off = offset;
821 vec.sfv_len = count;
822
823 res = sendfilev (ofd, &vec, 1, &sbytes);
824
825 if (res < 0 && sbytes)
826 res = sbytes;
827 }
828
829# endif
830#else
831 res = -1;
832 errno = ENOSYS;
833#endif
834
835 if (res < 0
836 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
837#if __solaris
838 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
839#endif
840 )
841 )
842 {
843 /* emulate sendfile. this is a major pain in the ass */
844 dBUF;
845
846 res = 0;
847
848 while (count)
849 {
850 ssize_t cnt;
851
852 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
853
854 if (cnt <= 0)
855 {
856 if (cnt && !res) res = -1;
857 break;
858 }
859
860 cnt = write (ofd, aio_buf, cnt);
861
862 if (cnt <= 0)
863 {
864 if (cnt && !res) res = -1;
865 break;
866 }
867
868 offset += cnt;
869 res += cnt;
870 count -= cnt;
871 }
872 }
873
874 return res;
875}
876
877/* read a full directory */
878static void scandir_ (aio_req req, worker *self)
879{
880 DIR *dirp;
881 union
882 {
883 struct dirent d;
884 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
885 } *u;
886 struct dirent *entp;
887 char *name, *names;
888 int memlen = 4096;
889 int memofs = 0;
890 int res = 0;
891 int errorno;
892
893 LOCK (wrklock);
894 self->dirp = dirp = opendir (req->dataptr);
895 self->dbuf = u = malloc (sizeof (*u));
896 req->data2ptr = names = malloc (memlen);
897 UNLOCK (wrklock);
898
899 if (dirp && u && names)
900 for (;;)
901 {
902 errno = 0;
903 readdir_r (dirp, &u->d, &entp);
904
905 if (!entp)
906 break;
907
908 name = entp->d_name;
909
910 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
911 {
912 int len = strlen (name) + 1;
913
914 res++;
915
916 while (memofs + len > memlen)
917 {
918 memlen *= 2;
919 LOCK (wrklock);
920 req->data2ptr = names = realloc (names, memlen);
921 UNLOCK (wrklock);
922
923 if (!names)
924 break;
925 }
926
927 memcpy (names + memofs, name, len);
928 memofs += len;
929 }
930 }
931
932 if (errno)
933 res = -1;
934
935 req->result = res;
936}
937
938/*****************************************************************************/
939
940static void *aio_proc (void *thr_arg)
116{ 941{
117 aio_req req; 942 aio_req req;
118 New (0, req, 1, aio_cb); 943 int type;
119 req->type = REQ_QUIT; 944 worker *self = (worker *)thr_arg;
120 945
121 send_req (req); 946 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 } 947 {
148 else 948 LOCK (reqlock);
149 {
150 /* read: grow scalar as necessary */
151 svptr = SvGROW (data, length + dataoffset);
152 }
153 949
154 if (length < 0) 950 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 { 951 {
198 int errorno = errno; 952 self->req = req = reqq_shift (&req_queue);
199 errno = req->errorno;
200 953
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) 954 if (req)
206 SvREFCNT_dec (req->data);
207
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209 { 955 break;
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211 PL_laststatval = req->result;
212 PL_statcache = *(req->statdata);
213 956
214 Safefree (req->statdata); 957 pthread_cond_wait (&reqwait, &reqlock);
215 }
216
217 PUSHMARK (SP);
218 XPUSHs (sv_2mortal (newSViv (req->result)));
219 PUTBACK;
220 call_sv (req->callback, G_VOID);
221 SPAGAIN;
222
223 if (req->callback)
224 SvREFCNT_dec (req->callback);
225
226 errno = errorno;
227 count++;
228 } 958 }
229 959
230 Safefree (req); 960 --nready;
961
962 UNLOCK (reqlock);
231 } 963
232
233 if (qs)
234 send_reqs ();
235
236 return count;
237}
238
239static void *
240aio_proc (void *thr_arg)
241{
242 aio_req req;
243
244 /* then loop */
245 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
246 {
247 errno = 0; /* strictly unnecessary */ 964 errno = 0; /* strictly unnecessary */
965 type = req->type; /* remember type for QUIT check */
248 966
967 if (!(req->flags & FLAG_CANCELLED))
249 switch (req->type) 968 switch (type)
250 { 969 {
251 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 970 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
252 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 971 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
253#if SYS_readahead 972
254 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 973 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
255#else 974 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
256 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break; 975
976 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
977 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
978 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
979
980 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
981 case REQ_CLOSE: req->result = close (req->fd); break;
982 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
983 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
984 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
985 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
986 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
987
988 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
989 case REQ_FSYNC: req->result = fsync (req->fd); break;
990 case REQ_READDIR: scandir_ (req, self); break;
991
992 case REQ_BUSY:
993 {
994 struct timeval tv;
995
996 tv.tv_sec = req->fd;
997 tv.tv_usec = req->fd2;
998
999 req->result = select (0, 0, 0, 0, &tv);
1000 }
1001
1002 case REQ_GROUP:
1003 case REQ_NOP:
1004 case REQ_QUIT:
1005 break;
1006
1007 default:
1008 req->result = ENOSYS;
1009 break;
1010 }
1011
1012 req->errorno = errno;
1013
1014 LOCK (reslock);
1015
1016 ++npending;
1017
1018 if (!reqq_push (&res_queue, req))
1019 /* write a dummy byte to the pipe so fh becomes ready */
1020 write (respipe [1], &respipe, 1);
1021
1022 self->req = 0;
1023 worker_clear (self);
1024
1025 UNLOCK (reslock);
1026 }
1027 while (type != REQ_QUIT);
1028
1029 LOCK (wrklock);
1030 worker_free (self);
1031 UNLOCK (wrklock);
1032
1033 return 0;
1034}
1035
1036/*****************************************************************************/
1037
1038static void atfork_prepare (void)
1039{
1040 LOCK (wrklock);
1041 LOCK (reqlock);
1042 LOCK (reslock);
1043#if !HAVE_PREADWRITE
1044 LOCK (preadwritelock);
257#endif 1045#endif
1046#if !HAVE_READDIR_R
1047 LOCK (readdirlock);
1048#endif
1049}
258 1050
259 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 1051static void atfork_parent (void)
260 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 1052{
261 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 1053#if !HAVE_READDIR_R
1054 UNLOCK (readdirlock);
1055#endif
1056#if !HAVE_PREADWRITE
1057 UNLOCK (preadwritelock);
1058#endif
1059 UNLOCK (reslock);
1060 UNLOCK (reqlock);
1061 UNLOCK (wrklock);
1062}
262 1063
263 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 1064static void atfork_child (void)
264 case REQ_CLOSE: req->result = close (req->fd); break; 1065{
265 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 1066 aio_req prv;
266 1067
267 case REQ_FSYNC: req->result = fsync (req->fd); break; 1068 while (prv = reqq_shift (&req_queue))
268 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 1069 req_free (prv);
269 1070
270 case REQ_QUIT: 1071 while (prv = reqq_shift (&res_queue))
271 write (respipe[1], (void *)&req, sizeof (req)); 1072 req_free (prv);
272 return 0;
273 1073
274 default: 1074 while (wrk_first.next != &wrk_first)
275 req->result = ENOSYS;
276 break;
277 }
278
279 req->errorno = errno;
280 write (respipe[1], (void *)&req, sizeof (req));
281 } 1075 {
1076 worker *wrk = wrk_first.next;
282 1077
283 return 0; 1078 if (wrk->req)
284} 1079 req_free (wrk->req);
285 1080
1081 worker_clear (wrk);
1082 worker_free (wrk);
1083 }
1084
1085 started = 0;
1086 nreqs = 0;
1087
1088 close (respipe [0]);
1089 close (respipe [1]);
1090 create_pipe ();
1091
1092 atfork_parent ();
1093}
1094
1095#define dREQ \
1096 aio_req req; \
1097 int req_pri = next_pri; \
1098 next_pri = DEFAULT_PRI + PRI_BIAS; \
1099 \
1100 if (SvOK (callback) && !SvROK (callback)) \
1101 croak ("callback must be undef or of reference type"); \
1102 \
1103 Newz (0, req, 1, aio_cb); \
1104 if (!req) \
1105 croak ("out of memory during aio_req allocation"); \
1106 \
1107 req->callback = newSVsv (callback); \
1108 req->pri = req_pri
1109
1110#define REQ_SEND \
1111 req_send (req); \
1112 \
1113 if (GIMME_V != G_VOID) \
1114 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1115
286MODULE = IO::AIO PACKAGE = IO::AIO 1116MODULE = IO::AIO PACKAGE = IO::AIO
287 1117
1118PROTOTYPES: ENABLE
1119
288BOOT: 1120BOOT:
289{ 1121{
290 if (pipe (reqpipe) || pipe (respipe)) 1122 HV *stash = gv_stashpv ("IO::AIO", 1);
291 croak ("unable to initialize request or result pipe"); 1123 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1124 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1125 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
292 1126
293 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) 1127 create_pipe ();
294 croak ("cannot set result pipe to nonblocking mode"); 1128 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
295
296 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
297 croak ("cannot set result pipe to nonblocking mode");
298} 1129}
299 1130
300void 1131void
301min_parallel(nthreads) 1132min_parallel (int nthreads)
302 int nthreads 1133 PROTOTYPE: $
1134
1135void
1136max_parallel (int nthreads)
1137 PROTOTYPE: $
1138
1139int
1140max_outstanding (int maxreqs)
303 PROTOTYPE: $ 1141 PROTOTYPE: $
304 CODE: 1142 CODE:
305 while (nthreads > started) 1143 RETVAL = max_outstanding;
306 start_thread (); 1144 max_outstanding = maxreqs;
1145 OUTPUT:
1146 RETVAL
307 1147
308void 1148void
309max_parallel(nthreads)
310 int nthreads
311 PROTOTYPE: $
312 CODE:
313{
314 int cur = started;
315 while (cur > nthreads)
316 {
317 end_thread ();
318 cur--;
319 }
320
321 while (started > nthreads)
322 {
323 poll_wait ();
324 poll_cb (aTHX);
325 }
326}
327
328void
329aio_open(pathname,flags,mode,callback) 1149aio_open (pathname,flags,mode,callback=&PL_sv_undef)
330 SV * pathname 1150 SV * pathname
331 int flags 1151 int flags
332 int mode 1152 int mode
333 SV * callback 1153 SV * callback
334 PROTOTYPE: $$$$ 1154 PROTOTYPE: $$$;$
335 CODE: 1155 PPCODE:
336{ 1156{
337 aio_req req; 1157 dREQ;
338
339 Newz (0, req, 1, aio_cb);
340
341 if (!req)
342 croak ("out of memory during aio_req allocation");
343 1158
344 req->type = REQ_OPEN; 1159 req->type = REQ_OPEN;
345 req->data = newSVsv (pathname); 1160 req->data = newSVsv (pathname);
346 req->dataptr = SvPV_nolen (req->data); 1161 req->dataptr = SvPVbyte_nolen (req->data);
347 req->fd = flags; 1162 req->fd = flags;
348 req->mode = mode; 1163 req->mode = mode;
349 req->callback = SvREFCNT_inc (callback);
350 1164
351 send_req (req); 1165 REQ_SEND;
352} 1166}
353 1167
354void 1168void
355aio_close(fh,callback) 1169aio_close (fh,callback=&PL_sv_undef)
356 InputStream fh 1170 SV * fh
357 SV * callback 1171 SV * callback
358 PROTOTYPE: $$ 1172 PROTOTYPE: $;$
359 ALIAS: 1173 ALIAS:
360 aio_close = REQ_CLOSE 1174 aio_close = REQ_CLOSE
361 aio_fsync = REQ_FSYNC 1175 aio_fsync = REQ_FSYNC
362 aio_fdatasync = REQ_FDATASYNC 1176 aio_fdatasync = REQ_FDATASYNC
363 CODE: 1177 PPCODE:
1178{
1179 dREQ;
1180
1181 req->type = ix;
1182 req->fh = newSVsv (fh);
1183 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1184
1185 REQ_SEND (req);
1186}
1187
1188void
1189aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1190 SV * fh
1191 UV offset
1192 UV length
1193 SV * data
1194 UV dataoffset
1195 SV * callback
1196 ALIAS:
1197 aio_read = REQ_READ
1198 aio_write = REQ_WRITE
1199 PROTOTYPE: $$$$$;$
1200 PPCODE:
364{ 1201{
365 aio_req req; 1202 aio_req req;
1203 STRLEN svlen;
1204 char *svptr = SvPVbyte (data, svlen);
366 1205
367 Newz (0, req, 1, aio_cb); 1206 SvUPGRADE (data, SVt_PV);
1207 SvPOK_on (data);
368 1208
369 if (!req) 1209 if (dataoffset < 0)
370 croak ("out of memory during aio_req allocation"); 1210 dataoffset += svlen;
371 1211
372 req->type = ix; 1212 if (dataoffset < 0 || dataoffset > svlen)
373 req->fd = PerlIO_fileno (fh); 1213 croak ("data offset outside of string");
374 req->callback = SvREFCNT_inc (callback);
375 1214
376 send_req (req); 1215 if (ix == REQ_WRITE)
377} 1216 {
378 1217 /* write: check length and adjust. */
379void 1218 if (length < 0 || length + dataoffset > svlen)
380aio_read(fh,offset,length,data,dataoffset,callback) 1219 length = svlen - dataoffset;
381 InputStream fh 1220 }
382 UV offset 1221 else
383 IV length 1222 {
384 SV * data 1223 /* read: grow scalar as necessary */
385 IV dataoffset 1224 svptr = SvGROW (data, length + dataoffset);
386 SV * callback 1225 }
387 PROTOTYPE: $$$$$$
388 CODE:
389 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
390
391void
392aio_write(fh,offset,length,data,dataoffset,callback)
393 OutputStream fh
394 UV offset
395 IV length
396 SV * data
397 IV dataoffset
398 SV * callback
399 PROTOTYPE: $$$$$$
400 CODE:
401 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
402
403void
404aio_readahead(fh,offset,length,callback)
405 InputStream fh
406 UV offset
407 IV length
408 SV * callback
409 PROTOTYPE: $$$$
410 CODE:
411{
412 aio_req req;
413 1226
414 if (length < 0) 1227 if (length < 0)
415 croak ("length must not be negative"); 1228 croak ("length must not be negative");
416 1229
417 Newz (0, req, 1, aio_cb); 1230 {
1231 dREQ;
418 1232
419 if (!req) 1233 req->type = ix;
420 croak ("out of memory during aio_req allocation"); 1234 req->fh = newSVsv (fh);
1235 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1236 : IoOFP (sv_2io (fh)));
1237 req->offset = offset;
1238 req->length = length;
1239 req->data = SvREFCNT_inc (data);
1240 req->dataptr = (char *)svptr + dataoffset;
1241
1242 if (!SvREADONLY (data))
1243 {
1244 SvREADONLY_on (data);
1245 req->data2ptr = (void *)data;
1246 }
1247
1248 REQ_SEND;
1249 }
1250}
1251
1252void
1253aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1254 SV * out_fh
1255 SV * in_fh
1256 UV in_offset
1257 UV length
1258 SV * callback
1259 PROTOTYPE: $$$$;$
1260 PPCODE:
1261{
1262 dREQ;
1263
1264 req->type = REQ_SENDFILE;
1265 req->fh = newSVsv (out_fh);
1266 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1267 req->fh2 = newSVsv (in_fh);
1268 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1269 req->offset = in_offset;
1270 req->length = length;
1271
1272 REQ_SEND;
1273}
1274
1275void
1276aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1277 SV * fh
1278 UV offset
1279 IV length
1280 SV * callback
1281 PROTOTYPE: $$$;$
1282 PPCODE:
1283{
1284 dREQ;
421 1285
422 req->type = REQ_READAHEAD; 1286 req->type = REQ_READAHEAD;
1287 req->fh = newSVsv (fh);
423 req->fd = PerlIO_fileno (fh); 1288 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
424 req->offset = offset; 1289 req->offset = offset;
425 req->length = length; 1290 req->length = length;
426 req->callback = SvREFCNT_inc (callback);
427 1291
428 send_req (req); 1292 REQ_SEND;
429} 1293}
430 1294
431void 1295void
432aio_stat(fh_or_path,callback) 1296aio_stat (fh_or_path,callback=&PL_sv_undef)
433 SV * fh_or_path 1297 SV * fh_or_path
434 SV * callback 1298 SV * callback
435 PROTOTYPE: $$
436 ALIAS: 1299 ALIAS:
1300 aio_stat = REQ_STAT
437 aio_lstat = 1 1301 aio_lstat = REQ_LSTAT
438 CODE: 1302 PPCODE:
439{ 1303{
440 aio_req req; 1304 dREQ;
441
442 Newz (0, req, 1, aio_cb);
443
444 if (!req)
445 croak ("out of memory during aio_req allocation");
446 1305
447 New (0, req->statdata, 1, Stat_t); 1306 New (0, req->statdata, 1, Stat_t);
448
449 if (!req->statdata) 1307 if (!req->statdata)
1308 {
1309 req_free (req);
450 croak ("out of memory during aio_req->statdata allocation"); 1310 croak ("out of memory during aio_req->statdata allocation");
1311 }
451 1312
452 if (SvPOK (fh_or_path)) 1313 if (SvPOK (fh_or_path))
453 { 1314 {
454 req->type = ix ? REQ_LSTAT : REQ_STAT; 1315 req->type = ix;
455 req->data = newSVsv (fh_or_path); 1316 req->data = newSVsv (fh_or_path);
456 req->dataptr = SvPV_nolen (req->data); 1317 req->dataptr = SvPVbyte_nolen (req->data);
457 } 1318 }
458 else 1319 else
459 { 1320 {
460 req->type = REQ_FSTAT; 1321 req->type = REQ_FSTAT;
1322 req->fh = newSVsv (fh_or_path);
461 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1323 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
462 } 1324 }
463 1325
464 req->callback = SvREFCNT_inc (callback); 1326 REQ_SEND;
465
466 send_req (req);
467} 1327}
468 1328
469void 1329void
470aio_unlink(pathname,callback) 1330aio_unlink (pathname,callback=&PL_sv_undef)
471 SV * pathname 1331 SV * pathname
472 SV * callback 1332 SV * callback
1333 ALIAS:
1334 aio_unlink = REQ_UNLINK
1335 aio_rmdir = REQ_RMDIR
1336 aio_readdir = REQ_READDIR
1337 PPCODE:
1338{
1339 dREQ;
1340
1341 req->type = ix;
1342 req->data = newSVsv (pathname);
1343 req->dataptr = SvPVbyte_nolen (req->data);
1344
1345 REQ_SEND;
1346}
1347
1348void
1349aio_link (oldpath,newpath,callback=&PL_sv_undef)
1350 SV * oldpath
1351 SV * newpath
1352 SV * callback
1353 ALIAS:
1354 aio_link = REQ_LINK
1355 aio_symlink = REQ_SYMLINK
1356 aio_rename = REQ_RENAME
1357 PPCODE:
1358{
1359 dREQ;
1360
1361 req->type = ix;
1362 req->fh = newSVsv (oldpath);
1363 req->data2ptr = SvPVbyte_nolen (req->fh);
1364 req->data = newSVsv (newpath);
1365 req->dataptr = SvPVbyte_nolen (req->data);
1366
1367 REQ_SEND;
1368}
1369
1370void
1371aio_busy (delay,callback=&PL_sv_undef)
1372 double delay
1373 SV * callback
1374 PPCODE:
1375{
1376 dREQ;
1377
1378 req->type = REQ_BUSY;
1379 req->fd = delay < 0. ? 0 : delay;
1380 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1381
1382 REQ_SEND;
1383}
1384
1385void
1386aio_group (callback=&PL_sv_undef)
1387 SV * callback
473 PROTOTYPE: $$ 1388 PROTOTYPE: ;$
1389 PPCODE:
1390{
1391 dREQ;
1392
1393 req->type = REQ_GROUP;
1394 req_send (req);
1395
1396 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1397}
1398
1399void
1400aio_nop (callback=&PL_sv_undef)
1401 SV * callback
1402 PPCODE:
1403{
1404 dREQ;
1405
1406 req->type = REQ_NOP;
1407
1408 REQ_SEND;
1409}
1410
1411int
1412aioreq_pri (int pri = 0)
1413 PROTOTYPE: ;$
474 CODE: 1414 CODE:
475{ 1415 RETVAL = next_pri - PRI_BIAS;
476 aio_req req; 1416 if (items > 0)
477 1417 {
478 Newz (0, req, 1, aio_cb); 1418 if (pri < PRI_MIN) pri = PRI_MIN;
479 1419 if (pri > PRI_MAX) pri = PRI_MAX;
480 if (!req) 1420 next_pri = pri + PRI_BIAS;
481 croak ("out of memory during aio_req allocation"); 1421 }
482 1422 OUTPUT:
483 req->type = REQ_UNLINK; 1423 RETVAL
484 req->data = newSVsv (pathname); 1424
485 req->dataptr = SvPV_nolen (req->data); 1425void
486 req->callback = SvREFCNT_inc (callback); 1426aioreq_nice (int nice = 0)
487 1427 CODE:
488 send_req (req); 1428 nice = next_pri - nice;
489} 1429 if (nice < PRI_MIN) nice = PRI_MIN;
1430 if (nice > PRI_MAX) nice = PRI_MAX;
1431 next_pri = nice + PRI_BIAS;
1432
1433void
1434flush ()
1435 PROTOTYPE:
1436 CODE:
1437 while (nreqs)
1438 {
1439 poll_wait ();
1440 poll_cb (0);
1441 }
1442
1443void
1444poll()
1445 PROTOTYPE:
1446 CODE:
1447 if (nreqs)
1448 {
1449 poll_wait ();
1450 poll_cb (0);
1451 }
490 1452
491int 1453int
492poll_fileno() 1454poll_fileno()
493 PROTOTYPE: 1455 PROTOTYPE:
494 CODE: 1456 CODE:
495 RETVAL = respipe[0]; 1457 RETVAL = respipe [0];
496 OUTPUT: 1458 OUTPUT:
497 RETVAL 1459 RETVAL
498 1460
499int 1461int
500poll_cb(...) 1462poll_cb(...)
501 PROTOTYPE: 1463 PROTOTYPE:
502 CODE: 1464 CODE:
1465 RETVAL = poll_cb (0);
1466 OUTPUT:
1467 RETVAL
1468
1469int
1470poll_some(int max = 0)
1471 PROTOTYPE: $
1472 CODE:
503 RETVAL = poll_cb (aTHX); 1473 RETVAL = poll_cb (max);
504 OUTPUT: 1474 OUTPUT:
505 RETVAL 1475 RETVAL
506 1476
507void 1477void
508poll_wait() 1478poll_wait()
509 PROTOTYPE: 1479 PROTOTYPE:
510 CODE: 1480 CODE:
1481 if (nreqs)
511 poll_wait (); 1482 poll_wait ();
512 1483
513int 1484int
514nreqs() 1485nreqs()
515 PROTOTYPE: 1486 PROTOTYPE:
516 CODE: 1487 CODE:
517 RETVAL = nreqs; 1488 RETVAL = nreqs;
518 OUTPUT: 1489 OUTPUT:
519 RETVAL 1490 RETVAL
520 1491
1492int
1493nready()
1494 PROTOTYPE:
1495 CODE:
1496 if (WORDREAD_UNSAFE) LOCK (reqlock);
1497 RETVAL = nready;
1498 if (WORDREAD_UNSAFE) UNLOCK (reqlock);
1499 OUTPUT:
1500 RETVAL
1501
1502int
1503npending()
1504 PROTOTYPE:
1505 CODE:
1506 if (WORDREAD_UNSAFE) LOCK (reslock);
1507 RETVAL = npending;
1508 if (WORDREAD_UNSAFE) UNLOCK (reslock);
1509 OUTPUT:
1510 RETVAL
1511
1512PROTOTYPES: DISABLE
1513
1514MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1515
1516void
1517cancel (aio_req_ornot req)
1518 CODE:
1519 req_cancel (req);
1520
1521void
1522cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1523 CODE:
1524 SvREFCNT_dec (req->callback);
1525 req->callback = newSVsv (callback);
1526
1527MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1528
1529void
1530add (aio_req grp, ...)
1531 PPCODE:
1532{
1533 int i;
1534 aio_req req;
1535
1536 if (grp->fd == 2)
1537 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1538
1539 for (i = 1; i < items; ++i )
1540 {
1541 if (GIMME_V != G_VOID)
1542 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1543
1544 req = SvAIO_REQ (ST (i));
1545
1546 if (req)
1547 {
1548 ++grp->length;
1549 req->grp = grp;
1550
1551 req->grp_prev = 0;
1552 req->grp_next = grp->grp_first;
1553
1554 if (grp->grp_first)
1555 grp->grp_first->grp_prev = req;
1556
1557 grp->grp_first = req;
1558 }
1559 }
1560}
1561
1562void
1563cancel_subs (aio_req_ornot req)
1564 CODE:
1565 req_cancel_subs (req);
1566
1567void
1568result (aio_req grp, ...)
1569 CODE:
1570{
1571 int i;
1572 AV *av;
1573
1574 grp->errorno = errno;
1575
1576 av = newAV ();
1577
1578 for (i = 1; i < items; ++i )
1579 av_push (av, newSVsv (ST (i)));
1580
1581 SvREFCNT_dec (grp->data);
1582 grp->data = (SV *)av;
1583}
1584
1585void
1586errno (aio_req grp, int errorno = errno)
1587 CODE:
1588 grp->errorno = errorno;
1589
1590void
1591limit (aio_req grp, int limit)
1592 CODE:
1593 grp->fd2 = limit;
1594 aio_grp_feed (grp);
1595
1596void
1597feed (aio_req grp, SV *callback=&PL_sv_undef)
1598 CODE:
1599{
1600 SvREFCNT_dec (grp->fh2);
1601 grp->fh2 = newSVsv (callback);
1602
1603 if (grp->fd2 <= 0)
1604 grp->fd2 = 2;
1605
1606 aio_grp_feed (grp);
1607}
1608

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