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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.8 by root, Mon Jul 11 02:53:59 2005 UTC vs.
Revision 1.81 by root, Fri Oct 27 20:10:06 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#include <endian.h>
12 32
13#include <pthread.h> 33#if HAVE_SENDFILE
34# if __linux
35# include <sys/sendfile.h>
36# elif __freebsd
14#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
15 47
16typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 48/* used for struct dirent, AIX doesn't provide it */
17typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49#ifndef NAME_MAX
18typedef 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
19 57
20#if __ia64 58#if __ia64
21# define STACKSIZE 65536 59# define STACKSIZE 65536
60#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61# define STACKSIZE PTHREAD_STACK_MIN
22#else 62#else
23# 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
24#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;
25 88
26enum { 89enum {
27 REQ_QUIT, 90 REQ_QUIT,
28 REQ_OPEN, REQ_CLOSE, 91 REQ_OPEN, REQ_CLOSE,
29 REQ_READ, REQ_WRITE, REQ_READAHEAD, 92 REQ_READ, REQ_WRITE, REQ_READAHEAD,
93 REQ_SENDFILE,
30 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 94 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
31 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,
32}; 101};
33 102
103#define AIO_REQ_KLASS "IO::AIO::REQ"
104#define AIO_GRP_KLASS "IO::AIO::GRP"
105
34typedef struct aio_cb { 106typedef struct aio_cb
107{
35 struct aio_cb *volatile next; 108 struct aio_cb *volatile next;
36 109
37 int type; 110 SV *data, *callback;
38 111 SV *fh, *fh2;
39 int fd; 112 void *dataptr, *data2ptr;
113 Stat_t *statdata;
40 off_t offset; 114 off_t offset;
41 size_t length; 115 size_t length;
42 ssize_t result; 116 ssize_t result;
117
118 STRLEN dataoffset;
119 int type;
120 int fd, fd2;
121 int errorno;
43 mode_t mode; /* open */ 122 mode_t mode; /* open */
44 int errorno;
45 SV *data, *callback;
46 void *dataptr;
47 STRLEN dataoffset;
48 123
49 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;
50} aio_cb; 129} aio_cb;
51 130
131enum {
132 FLAG_CANCELLED = 0x01,
133};
134
52typedef aio_cb *aio_req; 135typedef aio_cb *aio_req;
136typedef aio_cb *aio_req_ornot;
53 137
54static int started; 138enum {
55static int nreqs; 139 PRI_MIN = -4,
56static 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;
57static int respipe [2]; 202static int respipe [2];
58 203
59static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 204static pthread_mutex_t reslock = AIO_MUTEX_INIT;
60static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 205static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
61static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 206static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62 207
63static volatile aio_req reqs, reqe; /* queue start, queue end */ 208#if WORDREAD_UNSAFE
64static volatile aio_req ress, rese; /* queue start, queue end */
65 209
66static void 210static unsigned int get_nready ()
67poll_wait ()
68{ 211{
69 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)
70 return; 273 return 0;
71 274
72 fd_set rfd; 275 --q->size;
73 FD_ZERO(&rfd);
74 FD_SET(respipe [0], &rfd);
75 276
76 select (respipe [0] + 1, &rfd, 0, 0, 0); 277 for (pri = NUM_PRI; pri--; )
77} 278 {
279 aio_req req = q->qs[pri];
78 280
79static int 281 if (req)
80poll_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)
81{ 369{
82 dSP; 370 dSP;
83 int count = 0; 371
84 aio_req req; 372 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
85
86 { 373 {
87 /* read and signals sent by the worker threads */ 374 ENTER;
88 char buf [32]; 375 SAVETMPS;
89 while (read (respipe [0], buf, 32) > 0) 376 PUSHMARK (SP);
90 ; 377 EXTEND (SP, 1);
91 }
92 378
93 for (;;) 379 switch (req->type)
94 {
95 pthread_mutex_lock (&reslock);
96
97 req = ress;
98
99 if (ress)
100 { 380 {
101 ress = ress->next; 381 case REQ_READDIR:
102 if (!ress) rese = 0;
103 }
104
105 pthread_mutex_unlock (&reslock);
106
107 if (!req)
108 break;
109
110 nreqs--;
111
112 if (req->type == REQ_QUIT)
113 started--;
114 else
115 {
116 int errorno = errno;
117 errno = req->errorno;
118
119 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset
121 + req->result > 0 ? req->result : 0);
122
123 if (req->data)
124 SvREFCNT_dec (req->data);
125
126 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127 { 382 {
128 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 383 SV *rv = &PL_sv_undef;
129 PL_laststatval = req->result;
130 PL_statcache = *(req->statdata);
131 384
132 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);
133 } 405 }
406 break;
134 407
135 PUSHMARK (SP); 408 case REQ_OPEN:
136 XPUSHs (sv_2mortal (newSViv (req->result)));
137
138 if (req->type == REQ_OPEN)
139 { 409 {
140 /* convert fd to fh */ 410 /* convert fd to fh */
141 SV *fh; 411 SV *fh;
142 412
413 PUSHs (sv_2mortal (newSViv (req->result)));
143 PUTBACK; 414 PUTBACK;
144 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 415 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
145 SPAGAIN; 416 SPAGAIN;
146 417
147 fh = POPs; 418 fh = SvREFCNT_inc (POPs);
148 419
149 PUSHMARK (SP); 420 PUSHMARK (SP);
150 XPUSHs (fh); 421 XPUSHs (sv_2mortal (fh));
151 } 422 }
423 break;
152 424
153 if (SvOK (req->callback)) 425 case REQ_GROUP:
426 req->fd = 2; /* mark group as finished */
427
428 if (req->data)
154 { 429 {
155 PUTBACK; 430 int i;
156 call_sv (req->callback, G_VOID | G_EVAL); 431 AV *av = (AV *)req->data;
157 SPAGAIN; 432
433 EXTEND (SP, AvFILL (av) + 1);
434 for (i = 0; i <= AvFILL (av); ++i)
435 PUSHs (*av_fetch (av, i, 0));
158 } 436 }
159 437 break;
160 if (req->callback)
161 SvREFCNT_dec (req->callback);
162 438
163 errno = errorno; 439 case REQ_NOP:
164 count++; 440 case REQ_BUSY:
441 break;
442
443 default:
444 PUSHs (sv_2mortal (newSViv (req->result)));
445 break;
165 } 446 }
166 447
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
167 Safefree (req); 496 Safefree (req);
168 } 497}
169 498
170 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);
171} 518}
172 519
173static void *aio_proc(void *arg); 520static void *aio_proc(void *arg);
174 521
175static void
176start_thread (void) 522static void start_thread (void)
177{ 523{
178 sigset_t fullsigset, oldsigset; 524 sigset_t fullsigset, oldsigset;
179 pthread_t tid;
180 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");
181 531
182 pthread_attr_init (&attr); 532 pthread_attr_init (&attr);
183 pthread_attr_setstacksize (&attr, STACKSIZE); 533 pthread_attr_setstacksize (&attr, STACKSIZE);
184 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
185 538
186 sigfillset (&fullsigset); 539 sigfillset (&fullsigset);
540
541 LOCK (wrklock);
187 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 542 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
188 543
189 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;
190 started++; 550 ++started;
551 }
552 else
553 free (wrk);
191 554
192 sigprocmask (SIG_SETMASK, &oldsigset, 0); 555 sigprocmask (SIG_SETMASK, &oldsigset, 0);
556 UNLOCK (wrklock);
193} 557}
194 558
195static void 559static void maybe_start_thread ()
196send_req (aio_req req)
197{ 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{
198 nreqs++; 595 ++nreqs;
199 596
200 pthread_mutex_lock (&reqlock); 597 LOCK (reqlock);
598 ++nready;
599 reqq_push (&req_queue, req);
600 pthread_cond_signal (&reqwait);
601 UNLOCK (reqlock);
201 602
202 req->next = 0; 603 maybe_start_thread ();
604}
203 605
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 req_send (req);
616
617 LOCK (wrklock);
618 --started;
619 UNLOCK (wrklock);
620}
621
622static void min_parallel (int nthreads)
623{
624 if (wanted < nthreads)
625 wanted = nthreads;
626}
627
628static void max_parallel (int nthreads)
629{
630 if (wanted > nthreads)
631 wanted = nthreads;
632
633 while (started > wanted)
634 end_thread ();
635}
636
637static void poll_wait ()
638{
639 fd_set rfd;
640
641 while (nreqs)
642 {
643 int size;
644 if (WORDREAD_UNSAFE) LOCK (reslock);
645 size = res_queue.size;
646 if (WORDREAD_UNSAFE) UNLOCK (reslock);
647
648 if (size)
649 return;
650
651 maybe_start_thread ();
652
653 FD_ZERO(&rfd);
654 FD_SET(respipe [0], &rfd);
655
656 select (respipe [0] + 1, &rfd, 0, 0, 0);
657 }
658}
659
660static int poll_cb (int max)
661{
662 dSP;
663 int count = 0;
664 int do_croak = 0;
665 aio_req req;
666
667 for (;;)
668 {
669 while (max <= 0 || count < max)
670 {
671 maybe_start_thread ();
672
673 LOCK (reslock);
674 req = reqq_shift (&res_queue);
675
676 if (req)
677 {
678 --npending;
679
680 if (!res_queue.size)
681 {
682 /* read any signals sent by the worker threads */
683 char buf [32];
684 while (read (respipe [0], buf, 32) == 32)
685 ;
686 }
687 }
688
689 UNLOCK (reslock);
690
691 if (!req)
692 break;
693
694 --nreqs;
695
696 if (req->type == REQ_GROUP && req->length)
697 {
698 req->fd = 1; /* mark request as delayed */
699 continue;
700 }
701 else
702 {
703 if (req->type == REQ_READ)
704 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
705
706 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
707 SvREADONLY_off (req->data);
708
709 if (req->statdata)
710 {
711 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
712 PL_laststatval = req->result;
713 PL_statcache = *(req->statdata);
714 }
715
716 req_invoke (req);
717
718 count++;
719 }
720
721 req_free (req);
722 }
723
724 if (nreqs <= max_outstanding)
725 break;
726
727 poll_wait ();
728
729 max = 0;
730 }
731
732 return count;
733}
734
735static void create_pipe ()
736{
737 if (pipe (respipe))
738 croak ("unable to initialize result pipe");
739
740 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
741 croak ("cannot set result pipe to nonblocking mode");
742
743 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
744 croak ("cannot set result pipe to nonblocking mode");
745}
746
747/*****************************************************************************/
748/* work around various missing functions */
749
750#if !HAVE_PREADWRITE
751# define pread aio_pread
752# define pwrite aio_pwrite
753
754/*
755 * make our pread/pwrite safe against themselves, but not against
756 * normal read/write by using a mutex. slows down execution a lot,
757 * but that's your problem, not mine.
758 */
759static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
760
761static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
762{
763 ssize_t res;
764 off_t ooffset;
765
766 LOCK (preadwritelock);
767 ooffset = lseek (fd, 0, SEEK_CUR);
768 lseek (fd, offset, SEEK_SET);
769 res = read (fd, buf, count);
770 lseek (fd, ooffset, SEEK_SET);
771 UNLOCK (preadwritelock);
772
773 return res;
774}
775
776static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
777{
778 ssize_t res;
779 off_t ooffset;
780
781 LOCK (preadwritelock);
782 ooffset = lseek (fd, 0, SEEK_CUR);
783 lseek (fd, offset, SEEK_SET);
784 res = write (fd, buf, count);
785 lseek (fd, offset, SEEK_SET);
786 UNLOCK (preadwritelock);
787
788 return res;
789}
790#endif
791
792#if !HAVE_FDATASYNC
793# define fdatasync fsync
794#endif
795
796#if !HAVE_READAHEAD
797# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
798
799static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
800{
801 dBUF;
802
803 while (count > 0)
804 {
805 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
806
807 pread (fd, aio_buf, len, offset);
808 offset += len;
809 count -= len;
810 }
811
812 errno = 0;
813}
814
815#endif
816
817#if !HAVE_READDIR_R
818# define readdir_r aio_readdir_r
819
820static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
821
822static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
823{
824 struct dirent *e;
825 int errorno;
826
827 LOCK (readdirlock);
828
829 e = readdir (dirp);
830 errorno = errno;
831
204 if (reqe) 832 if (e)
205 { 833 {
206 reqe->next = req; 834 *res = ent;
207 reqe = req; 835 strcpy (ent->d_name, e->d_name);
208 } 836 }
209 else 837 else
210 reqe = reqs = req; 838 *res = 0;
211 839
212 pthread_cond_signal (&reqwait); 840 UNLOCK (readdirlock);
213 pthread_mutex_unlock (&reqlock);
214 841
215 while (nreqs > max_outstanding) 842 errno = errorno;
843 return e ? 0 : -1;
844}
845#endif
846
847/* sendfile always needs emulation */
848static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
849{
850 ssize_t res;
851
852 if (!count)
853 return 0;
854
855#if HAVE_SENDFILE
856# if __linux
857 res = sendfile (ofd, ifd, &offset, count);
858
859# elif __freebsd
860 /*
861 * Of course, the freebsd sendfile is a dire hack with no thoughts
862 * wasted on making it similar to other I/O functions.
863 */
864 {
865 off_t sbytes;
866 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
867
868 if (res < 0 && sbytes)
869 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
870 res = sbytes;
871 }
872
873# elif __hpux
874 res = sendfile (ofd, ifd, offset, count, 0, 0);
875
876# elif __solaris
877 {
878 struct sendfilevec vec;
879 size_t sbytes;
880
881 vec.sfv_fd = ifd;
882 vec.sfv_flag = 0;
883 vec.sfv_off = offset;
884 vec.sfv_len = count;
885
886 res = sendfilev (ofd, &vec, 1, &sbytes);
887
888 if (res < 0 && sbytes)
889 res = sbytes;
890 }
891
892# endif
893#else
894 res = -1;
895 errno = ENOSYS;
896#endif
897
898 if (res < 0
899 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
900#if __solaris
901 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
902#endif
903 )
904 )
905 {
906 /* emulate sendfile. this is a major pain in the ass */
907 dBUF;
908
909 res = 0;
910
911 while (count)
912 {
913 ssize_t cnt;
914
915 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
916
917 if (cnt <= 0)
918 {
919 if (cnt && !res) res = -1;
920 break;
921 }
922
923 cnt = write (ofd, aio_buf, cnt);
924
925 if (cnt <= 0)
926 {
927 if (cnt && !res) res = -1;
928 break;
929 }
930
931 offset += cnt;
932 res += cnt;
933 count -= cnt;
934 }
935 }
936
937 return res;
938}
939
940/* read a full directory */
941static void scandir_ (aio_req req, worker *self)
942{
943 DIR *dirp;
944 union
945 {
946 struct dirent d;
947 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
948 } *u;
949 struct dirent *entp;
950 char *name, *names;
951 int memlen = 4096;
952 int memofs = 0;
953 int res = 0;
954 int errorno;
955
956 LOCK (wrklock);
957 self->dirp = dirp = opendir (req->dataptr);
958 self->dbuf = u = malloc (sizeof (*u));
959 req->data2ptr = names = malloc (memlen);
960 UNLOCK (wrklock);
961
962 if (dirp && u && names)
963 for (;;)
216 { 964 {
217 poll_wait (); 965 errno = 0;
218 poll_cb (); 966 readdir_r (dirp, &u->d, &entp);
967
968 if (!entp)
969 break;
970
971 name = entp->d_name;
972
973 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
974 {
975 int len = strlen (name) + 1;
976
977 res++;
978
979 while (memofs + len > memlen)
980 {
981 memlen *= 2;
982 LOCK (wrklock);
983 req->data2ptr = names = realloc (names, memlen);
984 UNLOCK (wrklock);
985
986 if (!names)
987 break;
988 }
989
990 memcpy (names + memofs, name, len);
991 memofs += len;
992 }
219 } 993 }
220}
221 994
222static void 995 if (errno)
223end_thread (void) 996 res = -1;
997
998 req->result = res;
999}
1000
1001/*****************************************************************************/
1002
1003static void *aio_proc (void *thr_arg)
224{ 1004{
225 aio_req req; 1005 aio_req req;
226 New (0, req, 1, aio_cb); 1006 worker *self = (worker *)thr_arg;
227 req->type = REQ_QUIT;
228 1007
229 send_req (req); 1008 for (;;)
230}
231
232static void
233read_write (int dowrite, int fd, off_t offset, size_t length,
234 SV *data, STRLEN dataoffset, SV *callback)
235{
236 aio_req req;
237 STRLEN svlen;
238 char *svptr = SvPV (data, svlen);
239
240 SvUPGRADE (data, SVt_PV);
241 SvPOK_on (data);
242
243 if (dataoffset < 0)
244 dataoffset += svlen;
245
246 if (dataoffset < 0 || dataoffset > svlen)
247 croak ("data offset outside of string");
248
249 if (dowrite)
250 {
251 /* write: check length and adjust. */
252 if (length < 0 || length + dataoffset > svlen)
253 length = svlen - dataoffset;
254 } 1009 {
255 else 1010 LOCK (reqlock);
256 {
257 /* read: grow scalar as necessary */
258 svptr = SvGROW (data, length + dataoffset);
259 }
260
261 if (length < 0)
262 croak ("length must not be negative");
263
264 Newz (0, req, 1, aio_cb);
265
266 if (!req)
267 croak ("out of memory during aio_req allocation");
268
269 req->type = dowrite ? REQ_WRITE : REQ_READ;
270 req->fd = fd;
271 req->offset = offset;
272 req->length = length;
273 req->data = SvREFCNT_inc (data);
274 req->dataptr = (char *)svptr + dataoffset;
275 req->callback = SvREFCNT_inc (callback);
276
277 send_req (req);
278}
279
280static void *
281aio_proc (void *thr_arg)
282{
283 aio_req req;
284 int type;
285
286 do
287 {
288 pthread_mutex_lock (&reqlock);
289 1011
290 for (;;) 1012 for (;;)
291 { 1013 {
292 req = reqs; 1014 self->req = req = reqq_shift (&req_queue);
293
294 if (reqs)
295 {
296 reqs = reqs->next;
297 if (!reqs) reqe = 0;
298 }
299 1015
300 if (req) 1016 if (req)
301 break; 1017 break;
302 1018
303 pthread_cond_wait (&reqwait, &reqlock); 1019 pthread_cond_wait (&reqwait, &reqlock);
304 } 1020 }
305 1021
306 pthread_mutex_unlock (&reqlock); 1022 --nready;
1023
1024 UNLOCK (reqlock);
307 1025
308 errno = 0; /* strictly unnecessary */ 1026 errno = 0; /* strictly unnecessary */
309 1027
310 type = req->type; 1028 if (!(req->flags & FLAG_CANCELLED))
311
312 switch (type) 1029 switch (req->type)
313 { 1030 {
314 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 1031 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
315 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 1032 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
316#if SYS_readahead 1033
317 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 1034 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
318#else 1035 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
319 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
320#endif
321 1036
322 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 1037 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
323 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 1038 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
324 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 1039 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
325 1040
326 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 1041 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
327 case REQ_CLOSE: req->result = close (req->fd); break; 1042 case REQ_CLOSE: req->result = close (req->fd); break;
328 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 1043 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
329
330 case REQ_FSYNC: req->result = fsync (req->fd); break; 1044 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1045 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1046 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1047 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1048 case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1049
331 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 1050 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1051 case REQ_FSYNC: req->result = fsync (req->fd); break;
1052 case REQ_READDIR: scandir_ (req, self); break;
332 1053
1054 case REQ_BUSY:
1055 {
1056 struct timeval tv;
1057
1058 tv.tv_sec = req->fd;
1059 tv.tv_usec = req->fd2;
1060
1061 req->result = select (0, 0, 0, 0, &tv);
1062 }
1063
1064 case REQ_GROUP:
1065 case REQ_NOP:
1066 break;
1067
333 case REQ_QUIT: 1068 case REQ_QUIT:
334 break; 1069 LOCK (wrklock);
1070 worker_free (self);
1071 --started;
1072 UNLOCK (wrklock);
1073 return 0;
335 1074
336 default: 1075 default:
337 req->result = ENOSYS; 1076 req->result = ENOSYS;
338 break; 1077 break;
339 } 1078 }
340 1079
341 req->errorno = errno; 1080 req->errorno = errno;
342 1081
343 pthread_mutex_lock (&reslock); 1082 LOCK (reslock);
344 1083
345 req->next = 0; 1084 ++npending;
346 1085
347 if (rese) 1086 if (!reqq_push (&res_queue, req))
348 {
349 rese->next = req;
350 rese = req;
351 }
352 else
353 {
354 rese = ress = req;
355
356 /* write a dummy byte to the pipe so fh becomes ready */ 1087 /* write a dummy byte to the pipe so fh becomes ready */
357 write (respipe [1], &respipe, 1); 1088 write (respipe [1], &respipe, 1);
358 }
359 1089
360 pthread_mutex_unlock (&reslock); 1090 self->req = 0;
1091 worker_clear (self);
1092
1093 UNLOCK (reslock);
1094 }
1095}
1096
1097/*****************************************************************************/
1098
1099static void atfork_prepare (void)
1100{
1101 LOCK (wrklock);
1102 LOCK (reqlock);
1103 LOCK (reslock);
1104#if !HAVE_PREADWRITE
1105 LOCK (preadwritelock);
1106#endif
1107#if !HAVE_READDIR_R
1108 LOCK (readdirlock);
1109#endif
1110}
1111
1112static void atfork_parent (void)
1113{
1114#if !HAVE_READDIR_R
1115 UNLOCK (readdirlock);
1116#endif
1117#if !HAVE_PREADWRITE
1118 UNLOCK (preadwritelock);
1119#endif
1120 UNLOCK (reslock);
1121 UNLOCK (reqlock);
1122 UNLOCK (wrklock);
1123}
1124
1125static void atfork_child (void)
1126{
1127 aio_req prv;
1128
1129 while (prv = reqq_shift (&req_queue))
1130 req_free (prv);
1131
1132 while (prv = reqq_shift (&res_queue))
1133 req_free (prv);
1134
1135 while (wrk_first.next != &wrk_first)
361 } 1136 {
362 while (type != REQ_QUIT); 1137 worker *wrk = wrk_first.next;
363 1138
364 return 0; 1139 if (wrk->req)
365} 1140 req_free (wrk->req);
366 1141
1142 worker_clear (wrk);
1143 worker_free (wrk);
1144 }
1145
1146 started = 0;
1147 nreqs = 0;
1148
1149 close (respipe [0]);
1150 close (respipe [1]);
1151 create_pipe ();
1152
1153 atfork_parent ();
1154}
1155
1156#define dREQ \
1157 aio_req req; \
1158 int req_pri = next_pri; \
1159 next_pri = DEFAULT_PRI + PRI_BIAS; \
1160 \
1161 if (SvOK (callback) && !SvROK (callback)) \
1162 croak ("callback must be undef or of reference type"); \
1163 \
1164 Newz (0, req, 1, aio_cb); \
1165 if (!req) \
1166 croak ("out of memory during aio_req allocation"); \
1167 \
1168 req->callback = newSVsv (callback); \
1169 req->pri = req_pri
1170
1171#define REQ_SEND \
1172 req_send (req); \
1173 \
1174 if (GIMME_V != G_VOID) \
1175 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1176
367MODULE = IO::AIO PACKAGE = IO::AIO 1177MODULE = IO::AIO PACKAGE = IO::AIO
368 1178
369PROTOTYPES: ENABLE 1179PROTOTYPES: ENABLE
370 1180
371BOOT: 1181BOOT:
372{ 1182{
373 if (pipe (respipe)) 1183 HV *stash = gv_stashpv ("IO::AIO", 1);
374 croak ("unable to initialize result pipe"); 1184 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1185 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1186 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1187 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1188 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
375 1189
376 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1190 create_pipe ();
377 croak ("cannot set result pipe to nonblocking mode"); 1191 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
378 1192
379 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 1193 start_thread ();
380 croak ("cannot set result pipe to nonblocking mode");
381} 1194}
382 1195
383void 1196void
384min_parallel(nthreads) 1197min_parallel (int nthreads)
385 int nthreads 1198 PROTOTYPE: $
1199
1200void
1201max_parallel (int nthreads)
1202 PROTOTYPE: $
1203
1204int
1205max_outstanding (int maxreqs)
386 PROTOTYPE: $ 1206 PROTOTYPE: $
387 CODE: 1207 CODE:
388 while (nthreads > started)
389 start_thread ();
390
391void
392max_parallel(nthreads)
393 int nthreads
394 PROTOTYPE: $
395 CODE:
396{
397 int cur = started;
398 while (cur > nthreads)
399 {
400 end_thread ();
401 cur--;
402 }
403
404 while (started > nthreads)
405 {
406 poll_wait ();
407 poll_cb ();
408 }
409}
410
411int
412max_outstanding(nreqs)
413 int nreqs
414 PROTOTYPE: $
415 CODE:
416 RETVAL = max_outstanding; 1208 RETVAL = max_outstanding;
417 max_outstanding = nreqs; 1209 max_outstanding = maxreqs;
1210 OUTPUT:
1211 RETVAL
418 1212
419void 1213void
420aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1214aio_open (pathname,flags,mode,callback=&PL_sv_undef)
421 SV * pathname 1215 SV * pathname
422 int flags 1216 int flags
423 int mode 1217 int mode
424 SV * callback 1218 SV * callback
425 PROTOTYPE: $$$;$ 1219 PROTOTYPE: $$$;$
426 CODE: 1220 PPCODE:
427{ 1221{
428 aio_req req; 1222 dREQ;
429
430 Newz (0, req, 1, aio_cb);
431
432 if (!req)
433 croak ("out of memory during aio_req allocation");
434 1223
435 req->type = REQ_OPEN; 1224 req->type = REQ_OPEN;
436 req->data = newSVsv (pathname); 1225 req->data = newSVsv (pathname);
437 req->dataptr = SvPV_nolen (req->data); 1226 req->dataptr = SvPVbyte_nolen (req->data);
438 req->fd = flags; 1227 req->fd = flags;
439 req->mode = mode; 1228 req->mode = mode;
440 req->callback = SvREFCNT_inc (callback);
441 1229
442 send_req (req); 1230 REQ_SEND;
443} 1231}
444 1232
445void 1233void
446aio_close(fh,callback=&PL_sv_undef) 1234aio_close (fh,callback=&PL_sv_undef)
447 InputStream fh 1235 SV * fh
448 SV * callback 1236 SV * callback
449 PROTOTYPE: $;$ 1237 PROTOTYPE: $;$
450 ALIAS: 1238 ALIAS:
451 aio_close = REQ_CLOSE 1239 aio_close = REQ_CLOSE
452 aio_fsync = REQ_FSYNC 1240 aio_fsync = REQ_FSYNC
453 aio_fdatasync = REQ_FDATASYNC 1241 aio_fdatasync = REQ_FDATASYNC
454 CODE: 1242 PPCODE:
1243{
1244 dREQ;
1245
1246 req->type = ix;
1247 req->fh = newSVsv (fh);
1248 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1249
1250 REQ_SEND (req);
1251}
1252
1253void
1254aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1255 SV * fh
1256 UV offset
1257 UV length
1258 SV * data
1259 UV dataoffset
1260 SV * callback
1261 ALIAS:
1262 aio_read = REQ_READ
1263 aio_write = REQ_WRITE
1264 PROTOTYPE: $$$$$;$
1265 PPCODE:
455{ 1266{
456 aio_req req; 1267 aio_req req;
1268 STRLEN svlen;
1269 char *svptr = SvPVbyte (data, svlen);
457 1270
458 Newz (0, req, 1, aio_cb); 1271 SvUPGRADE (data, SVt_PV);
1272 SvPOK_on (data);
459 1273
460 if (!req) 1274 if (dataoffset < 0)
461 croak ("out of memory during aio_req allocation"); 1275 dataoffset += svlen;
462 1276
463 req->type = ix; 1277 if (dataoffset < 0 || dataoffset > svlen)
464 req->fd = PerlIO_fileno (fh); 1278 croak ("data offset outside of string");
465 req->callback = SvREFCNT_inc (callback);
466 1279
467 send_req (req); 1280 if (ix == REQ_WRITE)
468} 1281 {
469 1282 /* write: check length and adjust. */
470void 1283 if (length < 0 || length + dataoffset > svlen)
471aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1284 length = svlen - dataoffset;
472 InputStream fh 1285 }
473 UV offset 1286 else
474 IV length 1287 {
475 SV * data 1288 /* read: grow scalar as necessary */
476 IV dataoffset 1289 svptr = SvGROW (data, length + dataoffset);
477 SV * callback 1290 }
478 PROTOTYPE: $$$$$;$
479 CODE:
480 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
481
482void
483aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
484 OutputStream fh
485 UV offset
486 IV length
487 SV * data
488 IV dataoffset
489 SV * callback
490 PROTOTYPE: $$$$$;$
491 CODE:
492 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
493
494void
495aio_readahead(fh,offset,length,callback=&PL_sv_undef)
496 InputStream fh
497 UV offset
498 IV length
499 SV * callback
500 PROTOTYPE: $$$;$
501 CODE:
502{
503 aio_req req;
504 1291
505 if (length < 0) 1292 if (length < 0)
506 croak ("length must not be negative"); 1293 croak ("length must not be negative");
507 1294
508 Newz (0, req, 1, aio_cb); 1295 {
1296 dREQ;
509 1297
510 if (!req) 1298 req->type = ix;
511 croak ("out of memory during aio_req allocation"); 1299 req->fh = newSVsv (fh);
1300 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1301 : IoOFP (sv_2io (fh)));
1302 req->offset = offset;
1303 req->length = length;
1304 req->data = SvREFCNT_inc (data);
1305 req->dataptr = (char *)svptr + dataoffset;
1306
1307 if (!SvREADONLY (data))
1308 {
1309 SvREADONLY_on (data);
1310 req->data2ptr = (void *)data;
1311 }
1312
1313 REQ_SEND;
1314 }
1315}
1316
1317void
1318aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1319 SV * out_fh
1320 SV * in_fh
1321 UV in_offset
1322 UV length
1323 SV * callback
1324 PROTOTYPE: $$$$;$
1325 PPCODE:
1326{
1327 dREQ;
1328
1329 req->type = REQ_SENDFILE;
1330 req->fh = newSVsv (out_fh);
1331 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1332 req->fh2 = newSVsv (in_fh);
1333 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1334 req->offset = in_offset;
1335 req->length = length;
1336
1337 REQ_SEND;
1338}
1339
1340void
1341aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1342 SV * fh
1343 UV offset
1344 IV length
1345 SV * callback
1346 PROTOTYPE: $$$;$
1347 PPCODE:
1348{
1349 dREQ;
512 1350
513 req->type = REQ_READAHEAD; 1351 req->type = REQ_READAHEAD;
1352 req->fh = newSVsv (fh);
514 req->fd = PerlIO_fileno (fh); 1353 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
515 req->offset = offset; 1354 req->offset = offset;
516 req->length = length; 1355 req->length = length;
517 req->callback = SvREFCNT_inc (callback);
518 1356
519 send_req (req); 1357 REQ_SEND;
520} 1358}
521 1359
522void 1360void
523aio_stat(fh_or_path,callback=&PL_sv_undef) 1361aio_stat (fh_or_path,callback=&PL_sv_undef)
524 SV * fh_or_path 1362 SV * fh_or_path
525 SV * callback 1363 SV * callback
526 ALIAS: 1364 ALIAS:
527 aio_stat = REQ_STAT 1365 aio_stat = REQ_STAT
528 aio_lstat = REQ_LSTAT 1366 aio_lstat = REQ_LSTAT
529 CODE: 1367 PPCODE:
530{ 1368{
531 aio_req req; 1369 dREQ;
532
533 Newz (0, req, 1, aio_cb);
534
535 if (!req)
536 croak ("out of memory during aio_req allocation");
537 1370
538 New (0, req->statdata, 1, Stat_t); 1371 New (0, req->statdata, 1, Stat_t);
539
540 if (!req->statdata) 1372 if (!req->statdata)
1373 {
1374 req_free (req);
541 croak ("out of memory during aio_req->statdata allocation"); 1375 croak ("out of memory during aio_req->statdata allocation");
1376 }
542 1377
543 if (SvPOK (fh_or_path)) 1378 if (SvPOK (fh_or_path))
544 { 1379 {
545 req->type = ix; 1380 req->type = ix;
546 req->data = newSVsv (fh_or_path); 1381 req->data = newSVsv (fh_or_path);
547 req->dataptr = SvPV_nolen (req->data); 1382 req->dataptr = SvPVbyte_nolen (req->data);
548 } 1383 }
549 else 1384 else
550 { 1385 {
551 req->type = REQ_FSTAT; 1386 req->type = REQ_FSTAT;
1387 req->fh = newSVsv (fh_or_path);
552 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1388 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
553 } 1389 }
554 1390
555 req->callback = SvREFCNT_inc (callback); 1391 REQ_SEND;
556
557 send_req (req);
558} 1392}
559 1393
560void 1394void
561aio_unlink(pathname,callback=&PL_sv_undef) 1395aio_unlink (pathname,callback=&PL_sv_undef)
562 SV * pathname 1396 SV * pathname
563 SV * callback 1397 SV * callback
1398 ALIAS:
1399 aio_unlink = REQ_UNLINK
1400 aio_rmdir = REQ_RMDIR
1401 aio_readdir = REQ_READDIR
1402 PPCODE:
1403{
1404 dREQ;
1405
1406 req->type = ix;
1407 req->data = newSVsv (pathname);
1408 req->dataptr = SvPVbyte_nolen (req->data);
1409
1410 REQ_SEND;
1411}
1412
1413void
1414aio_link (oldpath,newpath,callback=&PL_sv_undef)
1415 SV * oldpath
1416 SV * newpath
1417 SV * callback
1418 ALIAS:
1419 aio_link = REQ_LINK
1420 aio_symlink = REQ_SYMLINK
1421 aio_rename = REQ_RENAME
1422 PPCODE:
1423{
1424 dREQ;
1425
1426 req->type = ix;
1427 req->fh = newSVsv (oldpath);
1428 req->data2ptr = SvPVbyte_nolen (req->fh);
1429 req->data = newSVsv (newpath);
1430 req->dataptr = SvPVbyte_nolen (req->data);
1431
1432 REQ_SEND;
1433}
1434
1435void
1436aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1437 SV * pathname
1438 SV * callback
1439 UV mode
1440 UV dev
1441 PPCODE:
1442{
1443 dREQ;
1444
1445 req->type = REQ_MKNOD;
1446 req->data = newSVsv (pathname);
1447 req->dataptr = SvPVbyte_nolen (req->data);
1448 req->mode = (mode_t)mode;
1449 req->offset = dev;
1450
1451 REQ_SEND;
1452}
1453
1454void
1455aio_busy (delay,callback=&PL_sv_undef)
1456 double delay
1457 SV * callback
1458 PPCODE:
1459{
1460 dREQ;
1461
1462 req->type = REQ_BUSY;
1463 req->fd = delay < 0. ? 0 : delay;
1464 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1465
1466 REQ_SEND;
1467}
1468
1469void
1470aio_group (callback=&PL_sv_undef)
1471 SV * callback
1472 PROTOTYPE: ;$
1473 PPCODE:
1474{
1475 dREQ;
1476
1477 req->type = REQ_GROUP;
1478 req_send (req);
1479
1480 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1481}
1482
1483void
1484aio_nop (callback=&PL_sv_undef)
1485 SV * callback
1486 PPCODE:
1487{
1488 dREQ;
1489
1490 req->type = REQ_NOP;
1491
1492 REQ_SEND;
1493}
1494
1495int
1496aioreq_pri (int pri = 0)
1497 PROTOTYPE: ;$
564 CODE: 1498 CODE:
565{ 1499 RETVAL = next_pri - PRI_BIAS;
566 aio_req req; 1500 if (items > 0)
567 1501 {
568 Newz (0, req, 1, aio_cb); 1502 if (pri < PRI_MIN) pri = PRI_MIN;
569 1503 if (pri > PRI_MAX) pri = PRI_MAX;
570 if (!req) 1504 next_pri = pri + PRI_BIAS;
571 croak ("out of memory during aio_req allocation"); 1505 }
572 1506 OUTPUT:
573 req->type = REQ_UNLINK; 1507 RETVAL
574 req->data = newSVsv (pathname);
575 req->dataptr = SvPV_nolen (req->data);
576 req->callback = SvREFCNT_inc (callback);
577
578 send_req (req);
579}
580 1508
581void 1509void
1510aioreq_nice (int nice = 0)
1511 CODE:
1512 nice = next_pri - nice;
1513 if (nice < PRI_MIN) nice = PRI_MIN;
1514 if (nice > PRI_MAX) nice = PRI_MAX;
1515 next_pri = nice + PRI_BIAS;
1516
1517void
582flush() 1518flush ()
583 PROTOTYPE: 1519 PROTOTYPE:
584 CODE: 1520 CODE:
585 while (nreqs) 1521 while (nreqs)
586 { 1522 {
587 poll_wait (); 1523 poll_wait ();
588 poll_cb (); 1524 poll_cb (0);
589 } 1525 }
590 1526
591void 1527void
592poll() 1528poll()
593 PROTOTYPE: 1529 PROTOTYPE:
594 CODE: 1530 CODE:
595 if (nreqs) 1531 if (nreqs)
596 { 1532 {
597 poll_wait (); 1533 poll_wait ();
598 poll_cb (); 1534 poll_cb (0);
599 } 1535 }
600 1536
601int 1537int
602poll_fileno() 1538poll_fileno()
603 PROTOTYPE: 1539 PROTOTYPE:
… …
608 1544
609int 1545int
610poll_cb(...) 1546poll_cb(...)
611 PROTOTYPE: 1547 PROTOTYPE:
612 CODE: 1548 CODE:
613 RETVAL = poll_cb (); 1549 RETVAL = poll_cb (0);
1550 OUTPUT:
1551 RETVAL
1552
1553int
1554poll_some(int max = 0)
1555 PROTOTYPE: $
1556 CODE:
1557 RETVAL = poll_cb (max);
614 OUTPUT: 1558 OUTPUT:
615 RETVAL 1559 RETVAL
616 1560
617void 1561void
618poll_wait() 1562poll_wait()
… …
627 CODE: 1571 CODE:
628 RETVAL = nreqs; 1572 RETVAL = nreqs;
629 OUTPUT: 1573 OUTPUT:
630 RETVAL 1574 RETVAL
631 1575
1576int
1577nready()
1578 PROTOTYPE:
1579 CODE:
1580 RETVAL = get_nready ();
1581 OUTPUT:
1582 RETVAL
1583
1584int
1585npending()
1586 PROTOTYPE:
1587 CODE:
1588 RETVAL = get_npending ();
1589 OUTPUT:
1590 RETVAL
1591
1592PROTOTYPES: DISABLE
1593
1594MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1595
1596void
1597cancel (aio_req_ornot req)
1598 CODE:
1599 req_cancel (req);
1600
1601void
1602cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1603 CODE:
1604 SvREFCNT_dec (req->callback);
1605 req->callback = newSVsv (callback);
1606
1607MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1608
1609void
1610add (aio_req grp, ...)
1611 PPCODE:
1612{
1613 int i;
1614 aio_req req;
1615
1616 if (grp->fd == 2)
1617 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1618
1619 for (i = 1; i < items; ++i )
1620 {
1621 if (GIMME_V != G_VOID)
1622 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1623
1624 req = SvAIO_REQ (ST (i));
1625
1626 if (req)
1627 {
1628 ++grp->length;
1629 req->grp = grp;
1630
1631 req->grp_prev = 0;
1632 req->grp_next = grp->grp_first;
1633
1634 if (grp->grp_first)
1635 grp->grp_first->grp_prev = req;
1636
1637 grp->grp_first = req;
1638 }
1639 }
1640}
1641
1642void
1643cancel_subs (aio_req_ornot req)
1644 CODE:
1645 req_cancel_subs (req);
1646
1647void
1648result (aio_req grp, ...)
1649 CODE:
1650{
1651 int i;
1652 AV *av;
1653
1654 grp->errorno = errno;
1655
1656 av = newAV ();
1657
1658 for (i = 1; i < items; ++i )
1659 av_push (av, newSVsv (ST (i)));
1660
1661 SvREFCNT_dec (grp->data);
1662 grp->data = (SV *)av;
1663}
1664
1665void
1666errno (aio_req grp, int errorno = errno)
1667 CODE:
1668 grp->errorno = errorno;
1669
1670void
1671limit (aio_req grp, int limit)
1672 CODE:
1673 grp->fd2 = limit;
1674 aio_grp_feed (grp);
1675
1676void
1677feed (aio_req grp, SV *callback=&PL_sv_undef)
1678 CODE:
1679{
1680 SvREFCNT_dec (grp->fh2);
1681 grp->fh2 = newSVsv (callback);
1682
1683 if (grp->fd2 <= 0)
1684 grp->fd2 = 2;
1685
1686 aio_grp_feed (grp);
1687}
1688

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