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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.9 by root, Tue Jul 12 11:02:54 2005 UTC vs.
Revision 1.83 by root, Sat Oct 28 00:17:30 2006 UTC

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>
12
1#include "EXTERN.h" 13#include "EXTERN.h"
2#include "perl.h" 14#include "perl.h"
3#include "XSUB.h" 15#include "XSUB.h"
4 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>
5#include <sys/types.h> 25#include <sys/types.h>
6#include <sys/stat.h> 26#include <sys/stat.h>
27#include <limits.h>
7#include <unistd.h> 28#include <unistd.h>
8#include <fcntl.h> 29#include <fcntl.h>
9#include <signal.h> 30#include <signal.h>
10#include <sched.h> 31#include <sched.h>
11 32
12#include <pthread.h> 33#if HAVE_SENDFILE
34# if __linux
35# include <sys/sendfile.h>
36# elif __freebsd
13#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
14 47
15typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 48/* used for struct dirent, AIX doesn't provide it */
16typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49#ifndef NAME_MAX
17typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 50# define NAME_MAX 4096
51#endif
52
53#ifndef PTHREAD_STACK_MIN
54/* care for broken platforms, e.g. windows */
55# define PTHREAD_STACK_MIN 16384
56#endif
18 57
19#if __ia64 58#if __ia64
20# define STACKSIZE 65536 59# define STACKSIZE 65536
60#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61# define STACKSIZE PTHREAD_STACK_MIN
21#else 62#else
22# define STACKSIZE 4096 63# define STACKSIZE 16384
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
23#endif 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;
24 88
25enum { 89enum {
26 REQ_QUIT, 90 REQ_QUIT,
27 REQ_OPEN, REQ_CLOSE, 91 REQ_OPEN, REQ_CLOSE,
28 REQ_READ, REQ_WRITE, REQ_READAHEAD, 92 REQ_READ, REQ_WRITE, REQ_READAHEAD,
93 REQ_SENDFILE,
29 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 94 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
30 REQ_FSYNC, REQ_FDATASYNC, 95 REQ_FSYNC, REQ_FDATASYNC,
96 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
97 REQ_MKNOD, REQ_READDIR,
98 REQ_LINK, REQ_SYMLINK,
99 REQ_GROUP, REQ_NOP,
100 REQ_BUSY,
31}; 101};
32 102
103#define AIO_REQ_KLASS "IO::AIO::REQ"
104#define AIO_GRP_KLASS "IO::AIO::GRP"
105
33typedef struct aio_cb { 106typedef struct aio_cb
107{
34 struct aio_cb *volatile next; 108 struct aio_cb *volatile next;
35 109
36 int type; 110 SV *data, *callback;
37 111 SV *fh, *fh2;
38 int fd; 112 void *dataptr, *data2ptr;
113 Stat_t *statdata;
39 off_t offset; 114 off_t offset;
40 size_t length; 115 size_t length;
41 ssize_t result; 116 ssize_t result;
117
118 STRLEN dataoffset;
119 int type;
120 int fd, fd2;
121 int errorno;
42 mode_t mode; /* open */ 122 mode_t mode; /* open */
43 int errorno;
44 SV *data, *callback;
45 void *dataptr;
46 STRLEN dataoffset;
47 123
48 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;
49} aio_cb; 129} aio_cb;
50 130
131enum {
132 FLAG_CANCELLED = 0x01,
133};
134
51typedef aio_cb *aio_req; 135typedef aio_cb *aio_req;
136typedef aio_cb *aio_req_ornot;
52 137
53static int started; 138enum {
54static int nreqs; 139 PRI_MIN = -4,
55static int max_outstanding = 1<<30; 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;
150
151#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
152# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
153#else
154# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
155#endif
156
157#define LOCK(mutex) pthread_mutex_lock (&(mutex))
158#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
159
160/* worker threads management */
161static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
162
163typedef struct worker {
164 /* locked by wrklock */
165 struct worker *prev, *next;
166
167 pthread_t tid;
168
169 /* locked by reslock, reqlock or wrklock */
170 aio_req req; /* currently processed request */
171 void *dbuf;
172 DIR *dirp;
173} worker;
174
175static worker wrk_first = { &wrk_first, &wrk_first, 0 };
176
177static void worker_clear (worker *wrk)
178{
179 if (wrk->dirp)
180 {
181 closedir (wrk->dirp);
182 wrk->dirp = 0;
183 }
184
185 if (wrk->dbuf)
186 {
187 free (wrk->dbuf);
188 wrk->dbuf = 0;
189 }
190}
191
192static void worker_free (worker *wrk)
193{
194 wrk->next->prev = wrk->prev;
195 wrk->prev->next = wrk->next;
196
197 free (wrk);
198}
199
200static volatile unsigned int nreqs, nready, npending;
201static volatile unsigned int max_outstanding = 0xffffffff;
56static int respipe [2]; 202static int respipe [2];
57 203
58static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 204static pthread_mutex_t reslock = AIO_MUTEX_INIT;
59static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 205static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
60static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 206static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
61 207
62static volatile aio_req reqs, reqe; /* queue start, queue end */ 208#if WORDREAD_UNSAFE
63static volatile aio_req ress, rese; /* queue start, queue end */
64 209
65static void 210static unsigned int get_nready ()
66poll_wait ()
67{ 211{
68 if (!nreqs) 212 unsigned int retval;
213
214 LOCK (reqlock);
215 retval = nready;
216 UNLOCK (reqlock);
217
218 return retval;
219}
220
221static unsigned int get_npending ()
222{
223 unsigned int retval;
224
225 LOCK (reslock);
226 retval = npending;
227 UNLOCK (reslock);
228
229 return retval;
230}
231
232#else
233
234# define get_nready() nready
235# define get_npending() npending
236
237#endif
238
239/*
240 * a somewhat faster data structure might be nice, but
241 * with 8 priorities this actually needs <20 insns
242 * per shift, the most expensive operation.
243 */
244typedef struct {
245 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
246 int size;
247} reqq;
248
249static reqq req_queue;
250static reqq res_queue;
251
252int reqq_push (reqq *q, aio_req req)
253{
254 int pri = req->pri;
255 req->next = 0;
256
257 if (q->qe[pri])
258 {
259 q->qe[pri]->next = req;
260 q->qe[pri] = req;
261 }
262 else
263 q->qe[pri] = q->qs[pri] = req;
264
265 return q->size++;
266}
267
268aio_req reqq_shift (reqq *q)
269{
270 int pri;
271
272 if (!q->size)
69 return; 273 return 0;
70 274
71 fd_set rfd; 275 --q->size;
72 FD_ZERO(&rfd);
73 FD_SET(respipe [0], &rfd);
74 276
75 select (respipe [0] + 1, &rfd, 0, 0, 0); 277 for (pri = NUM_PRI; pri--; )
76} 278 {
279 aio_req req = q->qs[pri];
77 280
78static int 281 if (req)
79poll_cb () 282 {
283 if (!(q->qs[pri] = req->next))
284 q->qe[pri] = 0;
285
286 return req;
287 }
288 }
289
290 abort ();
291}
292
293static int poll_cb (int max);
294static void req_invoke (aio_req req);
295static void req_free (aio_req req);
296static void req_cancel (aio_req req);
297
298/* must be called at most once */
299static SV *req_sv (aio_req req, const char *klass)
300{
301 if (!req->self)
302 {
303 req->self = (SV *)newHV ();
304 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
305 }
306
307 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
308}
309
310static aio_req SvAIO_REQ (SV *sv)
311{
312 MAGIC *mg;
313
314 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
315 croak ("object of class " AIO_REQ_KLASS " expected");
316
317 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
318
319 return mg ? (aio_req)mg->mg_ptr : 0;
320}
321
322static void aio_grp_feed (aio_req grp)
323{
324 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
325 {
326 int old_len = grp->length;
327
328 if (grp->fh2 && SvOK (grp->fh2))
329 {
330 dSP;
331
332 ENTER;
333 SAVETMPS;
334 PUSHMARK (SP);
335 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
336 PUTBACK;
337 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
338 SPAGAIN;
339 FREETMPS;
340 LEAVE;
341 }
342
343 /* stop if no progress has been made */
344 if (old_len == grp->length)
345 {
346 SvREFCNT_dec (grp->fh2);
347 grp->fh2 = 0;
348 break;
349 }
350 }
351}
352
353static void aio_grp_dec (aio_req grp)
354{
355 --grp->length;
356
357 /* call feeder, if applicable */
358 aio_grp_feed (grp);
359
360 /* finish, if done */
361 if (!grp->length && grp->fd)
362 {
363 req_invoke (grp);
364 req_free (grp);
365 }
366}
367
368static void req_invoke (aio_req req)
80{ 369{
81 dSP; 370 dSP;
82 int count = 0; 371
83 aio_req req; 372 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
84
85 { 373 {
86 /* read and signals sent by the worker threads */ 374 ENTER;
87 char buf [32]; 375 SAVETMPS;
88 while (read (respipe [0], buf, 32) > 0) 376 PUSHMARK (SP);
89 ; 377 EXTEND (SP, 1);
90 }
91 378
92 for (;;) 379 switch (req->type)
93 {
94 pthread_mutex_lock (&reslock);
95
96 req = ress;
97
98 if (ress)
99 { 380 {
100 ress = ress->next; 381 case REQ_READDIR:
101 if (!ress) rese = 0;
102 }
103
104 pthread_mutex_unlock (&reslock);
105
106 if (!req)
107 break;
108
109 nreqs--;
110
111 if (req->type == REQ_QUIT)
112 started--;
113 else
114 {
115 int errorno = errno;
116 errno = req->errorno;
117
118 if (req->type == REQ_READ)
119 SvCUR_set (req->data, req->dataoffset
120 + req->result > 0 ? req->result : 0);
121
122 if (req->data)
123 SvREFCNT_dec (req->data);
124
125 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
126 { 382 {
127 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 383 SV *rv = &PL_sv_undef;
128 PL_laststatval = req->result;
129 PL_statcache = *(req->statdata);
130 384
131 Safefree (req->statdata); 385 if (req->result >= 0)
386 {
387 int i;
388 char *buf = req->data2ptr;
389 AV *av = newAV ();
390
391 av_extend (av, req->result - 1);
392
393 for (i = 0; i < req->result; ++i)
394 {
395 SV *sv = newSVpv (buf, 0);
396
397 av_store (av, i, sv);
398 buf += SvCUR (sv) + 1;
399 }
400
401 rv = sv_2mortal (newRV_noinc ((SV *)av));
402 }
403
404 PUSHs (rv);
132 } 405 }
406 break;
133 407
134 PUSHMARK (SP); 408 case REQ_OPEN:
135 XPUSHs (sv_2mortal (newSViv (req->result)));
136
137 if (req->type == REQ_OPEN)
138 { 409 {
139 /* convert fd to fh */ 410 /* convert fd to fh */
140 SV *fh; 411 SV *fh;
141 412
413 PUSHs (sv_2mortal (newSViv (req->result)));
142 PUTBACK; 414 PUTBACK;
143 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 415 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
144 SPAGAIN; 416 SPAGAIN;
145 417
146 fh = POPs; 418 fh = SvREFCNT_inc (POPs);
147 419
148 PUSHMARK (SP); 420 PUSHMARK (SP);
149 XPUSHs (fh); 421 XPUSHs (sv_2mortal (fh));
150 } 422 }
423 break;
151 424
152 if (SvOK (req->callback)) 425 case REQ_GROUP:
426 req->fd = 2; /* mark group as finished */
427
428 if (req->data)
153 { 429 {
154 PUTBACK; 430 int i;
155 call_sv (req->callback, G_VOID | G_EVAL); 431 AV *av = (AV *)req->data;
156 SPAGAIN; 432
433 EXTEND (SP, AvFILL (av) + 1);
434 for (i = 0; i <= AvFILL (av); ++i)
435 PUSHs (*av_fetch (av, i, 0));
157 } 436 }
158 437 break;
159 if (req->callback)
160 SvREFCNT_dec (req->callback);
161 438
162 errno = errorno; 439 case REQ_NOP:
163 count++; 440 case REQ_BUSY:
441 break;
442
443 default:
444 PUSHs (sv_2mortal (newSViv (req->result)));
445 break;
164 } 446 }
165 447
448 errno = req->errorno;
449
450 PUTBACK;
451 call_sv (req->callback, G_VOID | G_EVAL);
452 SPAGAIN;
453
454 FREETMPS;
455 LEAVE;
456 }
457
458 if (req->grp)
459 {
460 aio_req grp = req->grp;
461
462 /* unlink request */
463 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
464 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
465
466 if (grp->grp_first == req)
467 grp->grp_first = req->grp_next;
468
469 aio_grp_dec (grp);
470 }
471
472 if (SvTRUE (ERRSV))
473 {
474 req_free (req);
475 croak (0);
476 }
477}
478
479static void req_free (aio_req req)
480{
481 if (req->self)
482 {
483 sv_unmagic (req->self, PERL_MAGIC_ext);
484 SvREFCNT_dec (req->self);
485 }
486
487 SvREFCNT_dec (req->data);
488 SvREFCNT_dec (req->fh);
489 SvREFCNT_dec (req->fh2);
490 SvREFCNT_dec (req->callback);
491 Safefree (req->statdata);
492
493 if (req->type == REQ_READDIR)
494 free (req->data2ptr);
495
166 Safefree (req); 496 Safefree (req);
167 } 497}
168 498
169 return count; 499static void req_cancel_subs (aio_req grp)
500{
501 aio_req sub;
502
503 if (grp->type != REQ_GROUP)
504 return;
505
506 SvREFCNT_dec (grp->fh2);
507 grp->fh2 = 0;
508
509 for (sub = grp->grp_first; sub; sub = sub->grp_next)
510 req_cancel (sub);
511}
512
513static void req_cancel (aio_req req)
514{
515 req->flags |= FLAG_CANCELLED;
516
517 req_cancel_subs (req);
170} 518}
171 519
172static void *aio_proc(void *arg); 520static void *aio_proc(void *arg);
173 521
174static void
175start_thread (void) 522static void start_thread (void)
176{ 523{
177 sigset_t fullsigset, oldsigset; 524 sigset_t fullsigset, oldsigset;
178 pthread_t tid;
179 pthread_attr_t attr; 525 pthread_attr_t attr;
526
527 worker *wrk = calloc (1, sizeof (worker));
528
529 if (!wrk)
530 croak ("unable to allocate worker thread data");
180 531
181 pthread_attr_init (&attr); 532 pthread_attr_init (&attr);
182 pthread_attr_setstacksize (&attr, STACKSIZE); 533 pthread_attr_setstacksize (&attr, STACKSIZE);
183 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 534 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
535#ifdef PTHREAD_SCOPE_PROCESS
536 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
537#endif
184 538
185 sigfillset (&fullsigset); 539 sigfillset (&fullsigset);
540
541 LOCK (wrklock);
186 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 542 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
187 543
188 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 544 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
545 {
546 wrk->prev = &wrk_first;
547 wrk->next = wrk_first.next;
548 wrk_first.next->prev = wrk;
549 wrk_first.next = wrk;
189 started++; 550 ++started;
551 }
552 else
553 free (wrk);
190 554
191 sigprocmask (SIG_SETMASK, &oldsigset, 0); 555 sigprocmask (SIG_SETMASK, &oldsigset, 0);
556 UNLOCK (wrklock);
192} 557}
193 558
194static void 559static void maybe_start_thread ()
195send_req (aio_req req)
196{ 560{
561#if 0
562 static struct timeval last;
563 struct timeval diff, now;
564#endif
565
566 if (started >= wanted)
567 return;
568
569 if (nready <= nreqs - get_nready () - get_npending ())
570 return;
571
572#if 0
573 gettimeofday (&now, 0);
574
575 diff.tv_sec = now.tv_sec - last.tv_sec;
576 diff.tv_usec = now.tv_usec - last.tv_usec;
577
578 if (diff.tv_usec < 0)
579 {
580 --diff.tv_sec;
581 diff.tv_usec += 1000000;
582 }
583
584 if (!diff.tv_sec && diff.tv_usec < 10000)
585 return;
586
587 last = now;
588#endif
589
590 start_thread ();
591}
592
593static void req_send (aio_req req)
594{
197 nreqs++; 595 ++nreqs;
198 596
199 pthread_mutex_lock (&reqlock); 597 LOCK (reqlock);
598 ++nready;
599 reqq_push (&req_queue, req);
600 pthread_cond_signal (&reqwait);
601 UNLOCK (reqlock);
200 602
201 req->next = 0; 603 maybe_start_thread ();
604}
202 605
606static void end_thread (void)
607{
608 aio_req req;
609
610 Newz (0, req, 1, aio_cb);
611
612 req->type = REQ_QUIT;
613 req->pri = PRI_MAX + PRI_BIAS;
614
615 LOCK (reqlock);
616 reqq_push (&req_queue, req);
617 pthread_cond_signal (&reqwait);
618 UNLOCK (reqlock);
619
620 LOCK (wrklock);
621 --started;
622 UNLOCK (wrklock);
623}
624
625static void min_parallel (int nthreads)
626{
627 if (wanted < nthreads)
628 wanted = nthreads;
629}
630
631static void max_parallel (int nthreads)
632{
633 if (wanted > nthreads)
634 wanted = nthreads;
635
636 while (started > wanted)
637 end_thread ();
638}
639
640static void poll_wait ()
641{
642 fd_set rfd;
643
644 while (nreqs)
645 {
646 int size;
647 if (WORDREAD_UNSAFE) LOCK (reslock);
648 size = res_queue.size;
649 if (WORDREAD_UNSAFE) UNLOCK (reslock);
650
651 if (size)
652 return;
653
654 maybe_start_thread ();
655
656 FD_ZERO(&rfd);
657 FD_SET(respipe [0], &rfd);
658
659 select (respipe [0] + 1, &rfd, 0, 0, 0);
660 }
661}
662
663static int poll_cb (int max)
664{
665 dSP;
666 int count = 0;
667 int do_croak = 0;
668 aio_req req;
669
670 for (;;)
671 {
672 while (max <= 0 || count < max)
673 {
674 maybe_start_thread ();
675
676 LOCK (reslock);
677 req = reqq_shift (&res_queue);
678
679 if (req)
680 {
681 --npending;
682
683 if (!res_queue.size)
684 {
685 /* read any signals sent by the worker threads */
686 char buf [32];
687 while (read (respipe [0], buf, 32) == 32)
688 ;
689 }
690 }
691
692 UNLOCK (reslock);
693
694 if (!req)
695 break;
696
697 --nreqs;
698
699 if (req->type == REQ_GROUP && req->length)
700 {
701 req->fd = 1; /* mark request as delayed */
702 continue;
703 }
704 else
705 {
706 if (req->type == REQ_READ)
707 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
708
709 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
710 SvREADONLY_off (req->data);
711
712 if (req->statdata)
713 {
714 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
715 PL_laststatval = req->result;
716 PL_statcache = *(req->statdata);
717 }
718
719 req_invoke (req);
720
721 count++;
722 }
723
724 req_free (req);
725 }
726
727 if (nreqs <= max_outstanding)
728 break;
729
730 poll_wait ();
731
732 max = 0;
733 }
734
735 return count;
736}
737
738static void create_pipe ()
739{
740 if (pipe (respipe))
741 croak ("unable to initialize result pipe");
742
743 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
744 croak ("cannot set result pipe to nonblocking mode");
745
746 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
747 croak ("cannot set result pipe to nonblocking mode");
748}
749
750/*****************************************************************************/
751/* work around various missing functions */
752
753#if !HAVE_PREADWRITE
754# define pread aio_pread
755# define pwrite aio_pwrite
756
757/*
758 * make our pread/pwrite safe against themselves, but not against
759 * normal read/write by using a mutex. slows down execution a lot,
760 * but that's your problem, not mine.
761 */
762static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
763
764static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
765{
766 ssize_t res;
767 off_t ooffset;
768
769 LOCK (preadwritelock);
770 ooffset = lseek (fd, 0, SEEK_CUR);
771 lseek (fd, offset, SEEK_SET);
772 res = read (fd, buf, count);
773 lseek (fd, ooffset, SEEK_SET);
774 UNLOCK (preadwritelock);
775
776 return res;
777}
778
779static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
780{
781 ssize_t res;
782 off_t ooffset;
783
784 LOCK (preadwritelock);
785 ooffset = lseek (fd, 0, SEEK_CUR);
786 lseek (fd, offset, SEEK_SET);
787 res = write (fd, buf, count);
788 lseek (fd, offset, SEEK_SET);
789 UNLOCK (preadwritelock);
790
791 return res;
792}
793#endif
794
795#if !HAVE_FDATASYNC
796# define fdatasync fsync
797#endif
798
799#if !HAVE_READAHEAD
800# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
801
802static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
803{
804 dBUF;
805
806 while (count > 0)
807 {
808 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
809
810 pread (fd, aio_buf, len, offset);
811 offset += len;
812 count -= len;
813 }
814
815 errno = 0;
816}
817
818#endif
819
820#if !HAVE_READDIR_R
821# define readdir_r aio_readdir_r
822
823static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
824
825static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
826{
827 struct dirent *e;
828 int errorno;
829
830 LOCK (readdirlock);
831
832 e = readdir (dirp);
833 errorno = errno;
834
203 if (reqe) 835 if (e)
204 { 836 {
205 reqe->next = req; 837 *res = ent;
206 reqe = req; 838 strcpy (ent->d_name, e->d_name);
207 } 839 }
208 else 840 else
209 reqe = reqs = req; 841 *res = 0;
210 842
211 pthread_cond_signal (&reqwait); 843 UNLOCK (readdirlock);
212 pthread_mutex_unlock (&reqlock);
213 844
214 while (nreqs > max_outstanding) 845 errno = errorno;
846 return e ? 0 : -1;
847}
848#endif
849
850/* sendfile always needs emulation */
851static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
852{
853 ssize_t res;
854
855 if (!count)
856 return 0;
857
858#if HAVE_SENDFILE
859# if __linux
860 res = sendfile (ofd, ifd, &offset, count);
861
862# elif __freebsd
863 /*
864 * Of course, the freebsd sendfile is a dire hack with no thoughts
865 * wasted on making it similar to other I/O functions.
866 */
867 {
868 off_t sbytes;
869 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
870
871 if (res < 0 && sbytes)
872 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
873 res = sbytes;
874 }
875
876# elif __hpux
877 res = sendfile (ofd, ifd, offset, count, 0, 0);
878
879# elif __solaris
880 {
881 struct sendfilevec vec;
882 size_t sbytes;
883
884 vec.sfv_fd = ifd;
885 vec.sfv_flag = 0;
886 vec.sfv_off = offset;
887 vec.sfv_len = count;
888
889 res = sendfilev (ofd, &vec, 1, &sbytes);
890
891 if (res < 0 && sbytes)
892 res = sbytes;
893 }
894
895# endif
896#else
897 res = -1;
898 errno = ENOSYS;
899#endif
900
901 if (res < 0
902 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
903#if __solaris
904 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
905#endif
906 )
907 )
908 {
909 /* emulate sendfile. this is a major pain in the ass */
910 dBUF;
911
912 res = 0;
913
914 while (count)
915 {
916 ssize_t cnt;
917
918 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
919
920 if (cnt <= 0)
921 {
922 if (cnt && !res) res = -1;
923 break;
924 }
925
926 cnt = write (ofd, aio_buf, cnt);
927
928 if (cnt <= 0)
929 {
930 if (cnt && !res) res = -1;
931 break;
932 }
933
934 offset += cnt;
935 res += cnt;
936 count -= cnt;
937 }
938 }
939
940 return res;
941}
942
943/* read a full directory */
944static void scandir_ (aio_req req, worker *self)
945{
946 DIR *dirp;
947 union
948 {
949 struct dirent d;
950 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
951 } *u;
952 struct dirent *entp;
953 char *name, *names;
954 int memlen = 4096;
955 int memofs = 0;
956 int res = 0;
957 int errorno;
958
959 LOCK (wrklock);
960 self->dirp = dirp = opendir (req->dataptr);
961 self->dbuf = u = malloc (sizeof (*u));
962 req->data2ptr = names = malloc (memlen);
963 UNLOCK (wrklock);
964
965 if (dirp && u && names)
966 for (;;)
215 { 967 {
216 poll_wait (); 968 errno = 0;
217 poll_cb (); 969 readdir_r (dirp, &u->d, &entp);
970
971 if (!entp)
972 break;
973
974 name = entp->d_name;
975
976 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
977 {
978 int len = strlen (name) + 1;
979
980 res++;
981
982 while (memofs + len > memlen)
983 {
984 memlen *= 2;
985 LOCK (wrklock);
986 req->data2ptr = names = realloc (names, memlen);
987 UNLOCK (wrklock);
988
989 if (!names)
990 break;
991 }
992
993 memcpy (names + memofs, name, len);
994 memofs += len;
995 }
218 } 996 }
219}
220 997
221static void 998 if (errno)
222end_thread (void) 999 res = -1;
1000
1001 req->result = res;
1002}
1003
1004/*****************************************************************************/
1005
1006static void *aio_proc (void *thr_arg)
223{ 1007{
224 aio_req req; 1008 aio_req req;
225 New (0, req, 1, aio_cb); 1009 worker *self = (worker *)thr_arg;
226 req->type = REQ_QUIT;
227 1010
228 send_req (req); 1011 for (;;)
229}
230
231static void
232read_write (int dowrite, int fd, off_t offset, size_t length,
233 SV *data, STRLEN dataoffset, SV *callback)
234{
235 aio_req req;
236 STRLEN svlen;
237 char *svptr = SvPV (data, svlen);
238
239 SvUPGRADE (data, SVt_PV);
240 SvPOK_on (data);
241
242 if (dataoffset < 0)
243 dataoffset += svlen;
244
245 if (dataoffset < 0 || dataoffset > svlen)
246 croak ("data offset outside of string");
247
248 if (dowrite)
249 {
250 /* write: check length and adjust. */
251 if (length < 0 || length + dataoffset > svlen)
252 length = svlen - dataoffset;
253 } 1012 {
254 else 1013 LOCK (reqlock);
255 {
256 /* read: grow scalar as necessary */
257 svptr = SvGROW (data, length + dataoffset);
258 }
259
260 if (length < 0)
261 croak ("length must not be negative");
262
263 Newz (0, req, 1, aio_cb);
264
265 if (!req)
266 croak ("out of memory during aio_req allocation");
267
268 req->type = dowrite ? REQ_WRITE : REQ_READ;
269 req->fd = fd;
270 req->offset = offset;
271 req->length = length;
272 req->data = SvREFCNT_inc (data);
273 req->dataptr = (char *)svptr + dataoffset;
274 req->callback = SvREFCNT_inc (callback);
275
276 send_req (req);
277}
278
279static void *
280aio_proc (void *thr_arg)
281{
282 aio_req req;
283 int type;
284
285 do
286 {
287 pthread_mutex_lock (&reqlock);
288 1014
289 for (;;) 1015 for (;;)
290 { 1016 {
291 req = reqs; 1017 self->req = req = reqq_shift (&req_queue);
292
293 if (reqs)
294 {
295 reqs = reqs->next;
296 if (!reqs) reqe = 0;
297 }
298 1018
299 if (req) 1019 if (req)
300 break; 1020 break;
301 1021
302 pthread_cond_wait (&reqwait, &reqlock); 1022 pthread_cond_wait (&reqwait, &reqlock);
303 } 1023 }
304 1024
305 pthread_mutex_unlock (&reqlock); 1025 --nready;
1026
1027 UNLOCK (reqlock);
306 1028
307 errno = 0; /* strictly unnecessary */ 1029 errno = 0; /* strictly unnecessary */
308 1030
309 type = req->type; 1031 if (!(req->flags & FLAG_CANCELLED))
310
311 switch (type) 1032 switch (req->type)
312 { 1033 {
313 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 1034 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
314 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 1035 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
315#if SYS_readahead 1036
316 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 1037 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
317#else 1038 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
318 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
319#endif
320 1039
321 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 1040 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
322 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 1041 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
323 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 1042 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
324 1043
325 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 1044 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
326 case REQ_CLOSE: req->result = close (req->fd); break; 1045 case REQ_CLOSE: req->result = close (req->fd); break;
327 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 1046 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
328
329 case REQ_FSYNC: req->result = fsync (req->fd); break; 1047 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1048 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1049 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1050 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1051 case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1052
330 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 1053 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1054 case REQ_FSYNC: req->result = fsync (req->fd); break;
1055 case REQ_READDIR: scandir_ (req, self); break;
331 1056
1057 case REQ_BUSY:
1058 {
1059 struct timeval tv;
1060
1061 tv.tv_sec = req->fd;
1062 tv.tv_usec = req->fd2;
1063
1064 req->result = select (0, 0, 0, 0, &tv);
1065 }
1066
1067 case REQ_GROUP:
1068 case REQ_NOP:
1069 break;
1070
332 case REQ_QUIT: 1071 case REQ_QUIT:
333 break; 1072 LOCK (wrklock);
1073 worker_free (self);
1074 --started;
1075 UNLOCK (wrklock);
1076 return 0;
334 1077
335 default: 1078 default:
336 req->result = ENOSYS; 1079 req->result = ENOSYS;
337 break; 1080 break;
338 } 1081 }
339 1082
340 req->errorno = errno; 1083 req->errorno = errno;
341 1084
342 pthread_mutex_lock (&reslock); 1085 LOCK (reslock);
343 1086
344 req->next = 0; 1087 ++npending;
345 1088
346 if (rese) 1089 if (!reqq_push (&res_queue, req))
347 {
348 rese->next = req;
349 rese = req;
350 }
351 else
352 {
353 rese = ress = req;
354
355 /* write a dummy byte to the pipe so fh becomes ready */ 1090 /* write a dummy byte to the pipe so fh becomes ready */
356 write (respipe [1], &respipe, 1); 1091 write (respipe [1], &respipe, 1);
357 }
358 1092
359 pthread_mutex_unlock (&reslock); 1093 self->req = 0;
1094 worker_clear (self);
1095
1096 UNLOCK (reslock);
1097 }
1098}
1099
1100/*****************************************************************************/
1101
1102static void atfork_prepare (void)
1103{
1104 LOCK (wrklock);
1105 LOCK (reqlock);
1106 LOCK (reslock);
1107#if !HAVE_PREADWRITE
1108 LOCK (preadwritelock);
1109#endif
1110#if !HAVE_READDIR_R
1111 LOCK (readdirlock);
1112#endif
1113}
1114
1115static void atfork_parent (void)
1116{
1117#if !HAVE_READDIR_R
1118 UNLOCK (readdirlock);
1119#endif
1120#if !HAVE_PREADWRITE
1121 UNLOCK (preadwritelock);
1122#endif
1123 UNLOCK (reslock);
1124 UNLOCK (reqlock);
1125 UNLOCK (wrklock);
1126}
1127
1128static void atfork_child (void)
1129{
1130 aio_req prv;
1131
1132 while (prv = reqq_shift (&req_queue))
1133 req_free (prv);
1134
1135 while (prv = reqq_shift (&res_queue))
1136 req_free (prv);
1137
1138 while (wrk_first.next != &wrk_first)
360 } 1139 {
361 while (type != REQ_QUIT); 1140 worker *wrk = wrk_first.next;
362 1141
363 return 0; 1142 if (wrk->req)
364} 1143 req_free (wrk->req);
365 1144
1145 worker_clear (wrk);
1146 worker_free (wrk);
1147 }
1148
1149 started = 0;
1150 nreqs = 0;
1151
1152 close (respipe [0]);
1153 close (respipe [1]);
1154 create_pipe ();
1155
1156 atfork_parent ();
1157}
1158
1159#define dREQ \
1160 aio_req req; \
1161 int req_pri = next_pri; \
1162 next_pri = DEFAULT_PRI + PRI_BIAS; \
1163 \
1164 if (SvOK (callback) && !SvROK (callback)) \
1165 croak ("callback must be undef or of reference type"); \
1166 \
1167 Newz (0, req, 1, aio_cb); \
1168 if (!req) \
1169 croak ("out of memory during aio_req allocation"); \
1170 \
1171 req->callback = newSVsv (callback); \
1172 req->pri = req_pri
1173
1174#define REQ_SEND \
1175 req_send (req); \
1176 \
1177 if (GIMME_V != G_VOID) \
1178 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1179
366MODULE = IO::AIO PACKAGE = IO::AIO 1180MODULE = IO::AIO PACKAGE = IO::AIO
367 1181
368PROTOTYPES: ENABLE 1182PROTOTYPES: ENABLE
369 1183
370BOOT: 1184BOOT:
371{ 1185{
372 if (pipe (respipe)) 1186 HV *stash = gv_stashpv ("IO::AIO", 1);
373 croak ("unable to initialize result pipe");
374 1187
375 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1188 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
376 croak ("cannot set result pipe to nonblocking mode"); 1189 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1190 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1191 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1192 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1193 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
377 1194
378 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 1195 create_pipe ();
379 croak ("cannot set result pipe to nonblocking mode"); 1196 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
380}
381 1197
1198 start_thread ();
1199}
1200
382void 1201void
383min_parallel(nthreads) 1202min_parallel (int nthreads)
384 int nthreads 1203 PROTOTYPE: $
1204
1205void
1206max_parallel (int nthreads)
1207 PROTOTYPE: $
1208
1209int
1210max_outstanding (int maxreqs)
385 PROTOTYPE: $ 1211 PROTOTYPE: $
386 CODE: 1212 CODE:
387 while (nthreads > started)
388 start_thread ();
389
390void
391max_parallel(nthreads)
392 int nthreads
393 PROTOTYPE: $
394 CODE:
395{
396 int cur = started;
397 while (cur > nthreads)
398 {
399 end_thread ();
400 cur--;
401 }
402
403 while (started > nthreads)
404 {
405 poll_wait ();
406 poll_cb ();
407 }
408}
409
410int
411max_outstanding(nreqs)
412 int nreqs
413 PROTOTYPE: $
414 CODE:
415 RETVAL = max_outstanding; 1213 RETVAL = max_outstanding;
416 max_outstanding = nreqs; 1214 max_outstanding = maxreqs;
1215 OUTPUT:
1216 RETVAL
417 1217
418void 1218void
419aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1219aio_open (pathname,flags,mode,callback=&PL_sv_undef)
420 SV * pathname 1220 SV * pathname
421 int flags 1221 int flags
422 int mode 1222 int mode
423 SV * callback 1223 SV * callback
424 PROTOTYPE: $$$;$ 1224 PROTOTYPE: $$$;$
425 CODE: 1225 PPCODE:
426{ 1226{
427 aio_req req; 1227 dREQ;
428
429 Newz (0, req, 1, aio_cb);
430
431 if (!req)
432 croak ("out of memory during aio_req allocation");
433 1228
434 req->type = REQ_OPEN; 1229 req->type = REQ_OPEN;
435 req->data = newSVsv (pathname); 1230 req->data = newSVsv (pathname);
436 req->dataptr = SvPV_nolen (req->data); 1231 req->dataptr = SvPVbyte_nolen (req->data);
437 req->fd = flags; 1232 req->fd = flags;
438 req->mode = mode; 1233 req->mode = mode;
439 req->callback = SvREFCNT_inc (callback);
440 1234
441 send_req (req); 1235 REQ_SEND;
442} 1236}
443 1237
444void 1238void
445aio_close(fh,callback=&PL_sv_undef) 1239aio_close (fh,callback=&PL_sv_undef)
446 InputStream fh 1240 SV * fh
447 SV * callback 1241 SV * callback
448 PROTOTYPE: $;$ 1242 PROTOTYPE: $;$
449 ALIAS: 1243 ALIAS:
450 aio_close = REQ_CLOSE 1244 aio_close = REQ_CLOSE
451 aio_fsync = REQ_FSYNC 1245 aio_fsync = REQ_FSYNC
452 aio_fdatasync = REQ_FDATASYNC 1246 aio_fdatasync = REQ_FDATASYNC
453 CODE: 1247 PPCODE:
1248{
1249 dREQ;
1250
1251 req->type = ix;
1252 req->fh = newSVsv (fh);
1253 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1254
1255 REQ_SEND (req);
1256}
1257
1258void
1259aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1260 SV * fh
1261 UV offset
1262 UV length
1263 SV * data
1264 UV dataoffset
1265 SV * callback
1266 ALIAS:
1267 aio_read = REQ_READ
1268 aio_write = REQ_WRITE
1269 PROTOTYPE: $$$$$;$
1270 PPCODE:
454{ 1271{
455 aio_req req; 1272 aio_req req;
1273 STRLEN svlen;
1274 char *svptr = SvPVbyte (data, svlen);
456 1275
457 Newz (0, req, 1, aio_cb); 1276 SvUPGRADE (data, SVt_PV);
1277 SvPOK_on (data);
458 1278
459 if (!req) 1279 if (dataoffset < 0)
460 croak ("out of memory during aio_req allocation"); 1280 dataoffset += svlen;
461 1281
462 req->type = ix; 1282 if (dataoffset < 0 || dataoffset > svlen)
463 req->fd = PerlIO_fileno (fh); 1283 croak ("data offset outside of string");
464 req->callback = SvREFCNT_inc (callback);
465 1284
466 send_req (req); 1285 if (ix == REQ_WRITE)
467} 1286 {
468 1287 /* write: check length and adjust. */
469void 1288 if (length < 0 || length + dataoffset > svlen)
470aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1289 length = svlen - dataoffset;
471 InputStream fh 1290 }
472 UV offset 1291 else
473 IV length 1292 {
474 SV * data 1293 /* read: grow scalar as necessary */
475 IV dataoffset 1294 svptr = SvGROW (data, length + dataoffset);
476 SV * callback 1295 }
477 PROTOTYPE: $$$$$;$
478 CODE:
479 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
480
481void
482aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
483 OutputStream fh
484 UV offset
485 IV length
486 SV * data
487 IV dataoffset
488 SV * callback
489 PROTOTYPE: $$$$$;$
490 CODE:
491 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
492
493void
494aio_readahead(fh,offset,length,callback=&PL_sv_undef)
495 InputStream fh
496 UV offset
497 IV length
498 SV * callback
499 PROTOTYPE: $$$;$
500 CODE:
501{
502 aio_req req;
503 1296
504 if (length < 0) 1297 if (length < 0)
505 croak ("length must not be negative"); 1298 croak ("length must not be negative");
506 1299
507 Newz (0, req, 1, aio_cb); 1300 {
1301 dREQ;
508 1302
509 if (!req) 1303 req->type = ix;
510 croak ("out of memory during aio_req allocation"); 1304 req->fh = newSVsv (fh);
1305 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1306 : IoOFP (sv_2io (fh)));
1307 req->offset = offset;
1308 req->length = length;
1309 req->data = SvREFCNT_inc (data);
1310 req->dataptr = (char *)svptr + dataoffset;
1311
1312 if (!SvREADONLY (data))
1313 {
1314 SvREADONLY_on (data);
1315 req->data2ptr = (void *)data;
1316 }
1317
1318 REQ_SEND;
1319 }
1320}
1321
1322void
1323aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1324 SV * out_fh
1325 SV * in_fh
1326 UV in_offset
1327 UV length
1328 SV * callback
1329 PROTOTYPE: $$$$;$
1330 PPCODE:
1331{
1332 dREQ;
1333
1334 req->type = REQ_SENDFILE;
1335 req->fh = newSVsv (out_fh);
1336 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1337 req->fh2 = newSVsv (in_fh);
1338 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1339 req->offset = in_offset;
1340 req->length = length;
1341
1342 REQ_SEND;
1343}
1344
1345void
1346aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1347 SV * fh
1348 UV offset
1349 IV length
1350 SV * callback
1351 PROTOTYPE: $$$;$
1352 PPCODE:
1353{
1354 dREQ;
511 1355
512 req->type = REQ_READAHEAD; 1356 req->type = REQ_READAHEAD;
1357 req->fh = newSVsv (fh);
513 req->fd = PerlIO_fileno (fh); 1358 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
514 req->offset = offset; 1359 req->offset = offset;
515 req->length = length; 1360 req->length = length;
516 req->callback = SvREFCNT_inc (callback);
517 1361
518 send_req (req); 1362 REQ_SEND;
519} 1363}
520 1364
521void 1365void
522aio_stat(fh_or_path,callback=&PL_sv_undef) 1366aio_stat (fh_or_path,callback=&PL_sv_undef)
523 SV * fh_or_path 1367 SV * fh_or_path
524 SV * callback 1368 SV * callback
525 ALIAS: 1369 ALIAS:
526 aio_stat = REQ_STAT 1370 aio_stat = REQ_STAT
527 aio_lstat = REQ_LSTAT 1371 aio_lstat = REQ_LSTAT
528 CODE: 1372 PPCODE:
529{ 1373{
530 aio_req req; 1374 dREQ;
531
532 Newz (0, req, 1, aio_cb);
533
534 if (!req)
535 croak ("out of memory during aio_req allocation");
536 1375
537 New (0, req->statdata, 1, Stat_t); 1376 New (0, req->statdata, 1, Stat_t);
538
539 if (!req->statdata) 1377 if (!req->statdata)
1378 {
1379 req_free (req);
540 croak ("out of memory during aio_req->statdata allocation"); 1380 croak ("out of memory during aio_req->statdata allocation");
1381 }
541 1382
542 if (SvPOK (fh_or_path)) 1383 if (SvPOK (fh_or_path))
543 { 1384 {
544 req->type = ix; 1385 req->type = ix;
545 req->data = newSVsv (fh_or_path); 1386 req->data = newSVsv (fh_or_path);
546 req->dataptr = SvPV_nolen (req->data); 1387 req->dataptr = SvPVbyte_nolen (req->data);
547 } 1388 }
548 else 1389 else
549 { 1390 {
550 req->type = REQ_FSTAT; 1391 req->type = REQ_FSTAT;
1392 req->fh = newSVsv (fh_or_path);
551 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1393 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
552 } 1394 }
553 1395
554 req->callback = SvREFCNT_inc (callback); 1396 REQ_SEND;
555
556 send_req (req);
557} 1397}
558 1398
559void 1399void
560aio_unlink(pathname,callback=&PL_sv_undef) 1400aio_unlink (pathname,callback=&PL_sv_undef)
561 SV * pathname 1401 SV * pathname
562 SV * callback 1402 SV * callback
1403 ALIAS:
1404 aio_unlink = REQ_UNLINK
1405 aio_rmdir = REQ_RMDIR
1406 aio_readdir = REQ_READDIR
1407 PPCODE:
1408{
1409 dREQ;
1410
1411 req->type = ix;
1412 req->data = newSVsv (pathname);
1413 req->dataptr = SvPVbyte_nolen (req->data);
1414
1415 REQ_SEND;
1416}
1417
1418void
1419aio_link (oldpath,newpath,callback=&PL_sv_undef)
1420 SV * oldpath
1421 SV * newpath
1422 SV * callback
1423 ALIAS:
1424 aio_link = REQ_LINK
1425 aio_symlink = REQ_SYMLINK
1426 aio_rename = REQ_RENAME
1427 PPCODE:
1428{
1429 dREQ;
1430
1431 req->type = ix;
1432 req->fh = newSVsv (oldpath);
1433 req->data2ptr = SvPVbyte_nolen (req->fh);
1434 req->data = newSVsv (newpath);
1435 req->dataptr = SvPVbyte_nolen (req->data);
1436
1437 REQ_SEND;
1438}
1439
1440void
1441aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1442 SV * pathname
1443 SV * callback
1444 UV mode
1445 UV dev
1446 PPCODE:
1447{
1448 dREQ;
1449
1450 req->type = REQ_MKNOD;
1451 req->data = newSVsv (pathname);
1452 req->dataptr = SvPVbyte_nolen (req->data);
1453 req->mode = (mode_t)mode;
1454 req->offset = dev;
1455
1456 REQ_SEND;
1457}
1458
1459void
1460aio_busy (delay,callback=&PL_sv_undef)
1461 double delay
1462 SV * callback
1463 PPCODE:
1464{
1465 dREQ;
1466
1467 req->type = REQ_BUSY;
1468 req->fd = delay < 0. ? 0 : delay;
1469 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1470
1471 REQ_SEND;
1472}
1473
1474void
1475aio_group (callback=&PL_sv_undef)
1476 SV * callback
1477 PROTOTYPE: ;$
1478 PPCODE:
1479{
1480 dREQ;
1481
1482 req->type = REQ_GROUP;
1483 req_send (req);
1484
1485 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1486}
1487
1488void
1489aio_nop (callback=&PL_sv_undef)
1490 SV * callback
1491 PPCODE:
1492{
1493 dREQ;
1494
1495 req->type = REQ_NOP;
1496
1497 REQ_SEND;
1498}
1499
1500int
1501aioreq_pri (int pri = 0)
1502 PROTOTYPE: ;$
563 CODE: 1503 CODE:
564{ 1504 RETVAL = next_pri - PRI_BIAS;
565 aio_req req; 1505 if (items > 0)
566 1506 {
567 Newz (0, req, 1, aio_cb); 1507 if (pri < PRI_MIN) pri = PRI_MIN;
568 1508 if (pri > PRI_MAX) pri = PRI_MAX;
569 if (!req) 1509 next_pri = pri + PRI_BIAS;
570 croak ("out of memory during aio_req allocation"); 1510 }
571 1511 OUTPUT:
572 req->type = REQ_UNLINK; 1512 RETVAL
573 req->data = newSVsv (pathname);
574 req->dataptr = SvPV_nolen (req->data);
575 req->callback = SvREFCNT_inc (callback);
576
577 send_req (req);
578}
579 1513
580void 1514void
1515aioreq_nice (int nice = 0)
1516 CODE:
1517 nice = next_pri - nice;
1518 if (nice < PRI_MIN) nice = PRI_MIN;
1519 if (nice > PRI_MAX) nice = PRI_MAX;
1520 next_pri = nice + PRI_BIAS;
1521
1522void
581flush() 1523flush ()
582 PROTOTYPE: 1524 PROTOTYPE:
583 CODE: 1525 CODE:
584 while (nreqs) 1526 while (nreqs)
585 { 1527 {
586 poll_wait (); 1528 poll_wait ();
587 poll_cb (); 1529 poll_cb (0);
588 } 1530 }
589 1531
590void 1532void
591poll() 1533poll()
592 PROTOTYPE: 1534 PROTOTYPE:
593 CODE: 1535 CODE:
594 if (nreqs) 1536 if (nreqs)
595 { 1537 {
596 poll_wait (); 1538 poll_wait ();
597 poll_cb (); 1539 poll_cb (0);
598 } 1540 }
599 1541
600int 1542int
601poll_fileno() 1543poll_fileno()
602 PROTOTYPE: 1544 PROTOTYPE:
… …
607 1549
608int 1550int
609poll_cb(...) 1551poll_cb(...)
610 PROTOTYPE: 1552 PROTOTYPE:
611 CODE: 1553 CODE:
612 RETVAL = poll_cb (); 1554 RETVAL = poll_cb (0);
1555 OUTPUT:
1556 RETVAL
1557
1558int
1559poll_some(int max = 0)
1560 PROTOTYPE: $
1561 CODE:
1562 RETVAL = poll_cb (max);
613 OUTPUT: 1563 OUTPUT:
614 RETVAL 1564 RETVAL
615 1565
616void 1566void
617poll_wait() 1567poll_wait()
… …
626 CODE: 1576 CODE:
627 RETVAL = nreqs; 1577 RETVAL = nreqs;
628 OUTPUT: 1578 OUTPUT:
629 RETVAL 1579 RETVAL
630 1580
1581int
1582nready()
1583 PROTOTYPE:
1584 CODE:
1585 RETVAL = get_nready ();
1586 OUTPUT:
1587 RETVAL
1588
1589int
1590npending()
1591 PROTOTYPE:
1592 CODE:
1593 RETVAL = get_npending ();
1594 OUTPUT:
1595 RETVAL
1596
1597PROTOTYPES: DISABLE
1598
1599MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1600
1601void
1602cancel (aio_req_ornot req)
1603 CODE:
1604 req_cancel (req);
1605
1606void
1607cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1608 CODE:
1609 SvREFCNT_dec (req->callback);
1610 req->callback = newSVsv (callback);
1611
1612MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1613
1614void
1615add (aio_req grp, ...)
1616 PPCODE:
1617{
1618 int i;
1619 aio_req req;
1620
1621 if (grp->fd == 2)
1622 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1623
1624 for (i = 1; i < items; ++i )
1625 {
1626 if (GIMME_V != G_VOID)
1627 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1628
1629 req = SvAIO_REQ (ST (i));
1630
1631 if (req)
1632 {
1633 ++grp->length;
1634 req->grp = grp;
1635
1636 req->grp_prev = 0;
1637 req->grp_next = grp->grp_first;
1638
1639 if (grp->grp_first)
1640 grp->grp_first->grp_prev = req;
1641
1642 grp->grp_first = req;
1643 }
1644 }
1645}
1646
1647void
1648cancel_subs (aio_req_ornot req)
1649 CODE:
1650 req_cancel_subs (req);
1651
1652void
1653result (aio_req grp, ...)
1654 CODE:
1655{
1656 int i;
1657 AV *av;
1658
1659 grp->errorno = errno;
1660
1661 av = newAV ();
1662
1663 for (i = 1; i < items; ++i )
1664 av_push (av, newSVsv (ST (i)));
1665
1666 SvREFCNT_dec (grp->data);
1667 grp->data = (SV *)av;
1668}
1669
1670void
1671errno (aio_req grp, int errorno = errno)
1672 CODE:
1673 grp->errorno = errorno;
1674
1675void
1676limit (aio_req grp, int limit)
1677 CODE:
1678 grp->fd2 = limit;
1679 aio_grp_feed (grp);
1680
1681void
1682feed (aio_req grp, SV *callback=&PL_sv_undef)
1683 CODE:
1684{
1685 SvREFCNT_dec (grp->fh2);
1686 grp->fh2 = newSVsv (callback);
1687
1688 if (grp->fd2 <= 0)
1689 grp->fd2 = 2;
1690
1691 aio_grp_feed (grp);
1692}
1693

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