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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs.
Revision 1.82 by root, Fri Oct 27 20:11:58 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
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
28#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;
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_MKNOD, 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 *volatile 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;
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;
60static int respipe [2]; 202static int respipe [2];
61 203
62static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 204static pthread_mutex_t reslock = AIO_MUTEX_INIT;
63static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 205static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
64static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 206static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65 207
66static volatile aio_req reqs, reqe; /* queue start, queue end */ 208#if WORDREAD_UNSAFE
67static volatile aio_req ress, rese; /* queue start, queue end */ 209
210static unsigned int get_nready ()
211{
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)
273 return 0;
274
275 --q->size;
276
277 for (pri = NUM_PRI; pri--; )
278 {
279 aio_req req = q->qs[pri];
280
281 if (req)
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)
369{
370 dSP;
371
372 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
373 {
374 ENTER;
375 SAVETMPS;
376 PUSHMARK (SP);
377 EXTEND (SP, 1);
378
379 switch (req->type)
380 {
381 case REQ_READDIR:
382 {
383 SV *rv = &PL_sv_undef;
384
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);
405 }
406 break;
407
408 case REQ_OPEN:
409 {
410 /* convert fd to fh */
411 SV *fh;
412
413 PUSHs (sv_2mortal (newSViv (req->result)));
414 PUTBACK;
415 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
416 SPAGAIN;
417
418 fh = SvREFCNT_inc (POPs);
419
420 PUSHMARK (SP);
421 XPUSHs (sv_2mortal (fh));
422 }
423 break;
424
425 case REQ_GROUP:
426 req->fd = 2; /* mark group as finished */
427
428 if (req->data)
429 {
430 int i;
431 AV *av = (AV *)req->data;
432
433 EXTEND (SP, AvFILL (av) + 1);
434 for (i = 0; i <= AvFILL (av); ++i)
435 PUSHs (*av_fetch (av, i, 0));
436 }
437 break;
438
439 case REQ_NOP:
440 case REQ_BUSY:
441 break;
442
443 default:
444 PUSHs (sv_2mortal (newSViv (req->result)));
445 break;
446 }
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
496 Safefree (req);
497}
498
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);
518}
68 519
69static void *aio_proc(void *arg); 520static void *aio_proc(void *arg);
70 521
71static void
72start_thread (void) 522static void start_thread (void)
73{ 523{
74 sigset_t fullsigset, oldsigset; 524 sigset_t fullsigset, oldsigset;
75 pthread_t tid;
76 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");
77 531
78 pthread_attr_init (&attr); 532 pthread_attr_init (&attr);
79 pthread_attr_setstacksize (&attr, STACKSIZE); 533 pthread_attr_setstacksize (&attr, STACKSIZE);
80 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
81 538
82 sigfillset (&fullsigset); 539 sigfillset (&fullsigset);
540
541 LOCK (wrklock);
83 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 542 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
84 543
85 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;
86 started++; 550 ++started;
551 }
552 else
553 free (wrk);
87 554
88 sigprocmask (SIG_SETMASK, &oldsigset, 0); 555 sigprocmask (SIG_SETMASK, &oldsigset, 0);
556 UNLOCK (wrklock);
89} 557}
90 558
91static void 559static void maybe_start_thread ()
92send_req (aio_req req)
93{ 560{
94 nreqs++; 561#if 0
562 static struct timeval last;
563 struct timeval diff, now;
564#endif
95 565
96 pthread_mutex_lock (&reqlock); 566 if (started >= wanted)
567 return;
568
569 if (nready <= nreqs - get_nready () - get_npending ())
570 return;
97 571
98 req->next = 0; 572#if 0
573 gettimeofday (&now, 0);
99 574
100 if (reqe) 575 diff.tv_sec = now.tv_sec - last.tv_sec;
101 { 576 diff.tv_usec = now.tv_usec - last.tv_usec;
102 reqe->next = req; 577
103 reqe = req; 578 if (diff.tv_usec < 0)
104 } 579 {
105 else 580 --diff.tv_sec;
106 reqe = reqs = req; 581 diff.tv_usec += 1000000;
582 }
107 583
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{
595 ++nreqs;
596
597 LOCK (reqlock);
598 ++nready;
599 reqq_push (&req_queue, req);
108 pthread_cond_signal (&reqwait); 600 pthread_cond_signal (&reqwait);
109 pthread_mutex_unlock (&reqlock); 601 UNLOCK (reqlock);
110}
111 602
112static void 603 maybe_start_thread ();
113end_thread (void) 604}
605
606static void end_thread (void)
114{ 607{
115 aio_req req; 608 aio_req req;
609
116 New (0, req, 1, aio_cb); 610 Newz (0, req, 1, aio_cb);
611
117 req->type = REQ_QUIT; 612 req->type = REQ_QUIT;
613 req->pri = PRI_MAX + PRI_BIAS;
118 614
119 send_req (req); 615 req_send (req);
120}
121 616
122static void 617 LOCK (wrklock);
123read_write (pTHX_ 618 --started;
124 int dowrite, int fd, off_t offset, size_t length, 619 UNLOCK (wrklock);
125 SV *data, STRLEN dataoffset, SV *callback)
126{
127 aio_req req;
128 STRLEN svlen;
129 char *svptr = SvPV (data, svlen);
130
131 SvUPGRADE (data, SVt_PV);
132 SvPOK_on (data);
133
134 if (dataoffset < 0)
135 dataoffset += svlen;
136
137 if (dataoffset < 0 || dataoffset > svlen)
138 croak ("data offset outside of string");
139
140 if (dowrite)
141 {
142 /* write: check length and adjust. */
143 if (length < 0 || length + dataoffset > svlen)
144 length = svlen - dataoffset;
145 }
146 else
147 {
148 /* read: grow scalar as necessary */
149 svptr = SvGROW (data, length + dataoffset);
150 }
151
152 if (length < 0)
153 croak ("length must not be negative");
154
155 Newz (0, req, 1, aio_cb);
156
157 if (!req)
158 croak ("out of memory during aio_req allocation");
159
160 req->type = dowrite ? REQ_WRITE : REQ_READ;
161 req->fd = fd;
162 req->offset = offset;
163 req->length = length;
164 req->data = SvREFCNT_inc (data);
165 req->dataptr = (char *)svptr + dataoffset;
166 req->callback = SvREFCNT_inc (callback);
167
168 send_req (req);
169} 620}
170 621
171static void 622static void min_parallel (int nthreads)
172poll_wait ()
173{ 623{
174 if (!nreqs) 624 if (wanted < nthreads)
175 return; 625 wanted = nthreads;
626}
176 627
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{
177 fd_set rfd; 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
178 FD_ZERO(&rfd); 653 FD_ZERO(&rfd);
179 FD_SET(respipe [0], &rfd); 654 FD_SET(respipe [0], &rfd);
180 655
181 select (respipe [0] + 1, &rfd, 0, 0, 0); 656 select (respipe [0] + 1, &rfd, 0, 0, 0);
657 }
182} 658}
183 659
184static int 660static int poll_cb (int max)
185poll_cb (pTHX)
186{ 661{
187 dSP; 662 dSP;
188 int count = 0; 663 int count = 0;
664 int do_croak = 0;
189 aio_req req; 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;
190 821
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
832 if (e)
833 {
834 *res = ent;
835 strcpy (ent->d_name, e->d_name);
836 }
837 else
838 *res = 0;
839
840 UNLOCK (readdirlock);
841
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 */
191 { 864 {
192 /* read and signals sent by the worker threads */ 865 off_t sbytes;
193 char buf [32]; 866 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
194 while (read (respipe [0], buf, 32) > 0) 867
195 ; 868 if (res < 0 && sbytes)
869 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
870 res = sbytes;
196 } 871 }
197 872
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 (;;)
964 {
965 errno = 0;
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 }
993 }
994
995 if (errno)
996 res = -1;
997
998 req->result = res;
999}
1000
1001/*****************************************************************************/
1002
1003static void *aio_proc (void *thr_arg)
1004{
1005 aio_req req;
1006 worker *self = (worker *)thr_arg;
1007
198 for (;;) 1008 for (;;)
199 { 1009 {
200 pthread_mutex_lock (&reslock); 1010 LOCK (reqlock);
201
202 req = ress;
203
204 if (ress)
205 {
206 ress = ress->next;
207 if (!ress) rese = 0;
208 }
209
210 pthread_mutex_unlock (&reslock);
211
212 if (!req)
213 break;
214
215 nreqs--;
216
217 if (req->type == REQ_QUIT)
218 started--;
219 else
220 {
221 int errorno = errno;
222 errno = req->errorno;
223
224 if (req->type == REQ_READ)
225 SvCUR_set (req->data, req->dataoffset
226 + req->result > 0 ? req->result : 0);
227
228 if (req->data)
229 SvREFCNT_dec (req->data);
230
231 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
232 {
233 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
234 PL_laststatval = req->result;
235 PL_statcache = *(req->statdata);
236
237 Safefree (req->statdata);
238 }
239
240 PUSHMARK (SP);
241 XPUSHs (sv_2mortal (newSViv (req->result)));
242
243 if (req->type == REQ_OPEN)
244 {
245 /* convert fd to fh */
246 SV *fh;
247
248 PUTBACK;
249 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
250 SPAGAIN;
251
252 fh = POPs;
253
254 PUSHMARK (SP);
255 XPUSHs (fh);
256 }
257
258 PUTBACK;
259 call_sv (req->callback, G_VOID | G_EVAL);
260 SPAGAIN;
261
262 if (req->callback)
263 SvREFCNT_dec (req->callback);
264
265 errno = errorno;
266 count++;
267 }
268
269 Safefree (req);
270 }
271
272 return count;
273}
274
275static void *
276aio_proc (void *thr_arg)
277{
278 aio_req req;
279 int type;
280
281 do
282 {
283 pthread_mutex_lock (&reqlock);
284 1011
285 for (;;) 1012 for (;;)
286 { 1013 {
287 req = reqs; 1014 self->req = req = reqq_shift (&req_queue);
288
289 if (reqs)
290 {
291 reqs = reqs->next;
292 if (!reqs) reqe = 0;
293 }
294 1015
295 if (req) 1016 if (req)
296 break; 1017 break;
297 1018
298 pthread_cond_wait (&reqwait, &reqlock); 1019 pthread_cond_wait (&reqwait, &reqlock);
299 } 1020 }
300 1021
301 pthread_mutex_unlock (&reqlock); 1022 --nready;
1023
1024 UNLOCK (reqlock);
302 1025
303 errno = 0; /* strictly unnecessary */ 1026 errno = 0; /* strictly unnecessary */
304 1027
305 type = req->type; 1028 if (!(req->flags & FLAG_CANCELLED))
306
307 switch (type) 1029 switch (req->type)
308 { 1030 {
309 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;
310 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;
311#if SYS_readahead 1033
312 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;
313#else 1035 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
314 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
315#endif
316 1036
317 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 1037 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
318 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 1038 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
319 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 1039 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
320 1040
321 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;
322 case REQ_CLOSE: req->result = close (req->fd); break; 1042 case REQ_CLOSE: req->result = close (req->fd); break;
323 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 1043 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
324
325 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
326 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;
327 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
328 case REQ_QUIT: 1068 case REQ_QUIT:
329 break; 1069 LOCK (wrklock);
1070 worker_free (self);
1071 --started;
1072 UNLOCK (wrklock);
1073 return 0;
330 1074
331 default: 1075 default:
332 req->result = ENOSYS; 1076 req->result = ENOSYS;
333 break; 1077 break;
334 } 1078 }
335 1079
336 req->errorno = errno; 1080 req->errorno = errno;
337 1081
338 pthread_mutex_lock (&reslock); 1082 LOCK (reslock);
339 1083
340 req->next = 0; 1084 ++npending;
341 1085
342 if (rese) 1086 if (!reqq_push (&res_queue, req))
343 {
344 rese->next = req;
345 rese = req;
346 }
347 else
348 {
349 rese = ress = req;
350
351 /* write a dummy byte to the pipe so fh becomes ready */ 1087 /* write a dummy byte to the pipe so fh becomes ready */
352 write (respipe [1], &respipe, 1); 1088 write (respipe [1], &respipe, 1);
353 }
354 1089
355 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)
356 } 1136 {
357 while (type != REQ_QUIT); 1137 worker *wrk = wrk_first.next;
358 1138
359 return 0; 1139 if (wrk->req)
360} 1140 req_free (wrk->req);
361 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
362MODULE = IO::AIO PACKAGE = IO::AIO 1177MODULE = IO::AIO PACKAGE = IO::AIO
363 1178
1179PROTOTYPES: ENABLE
1180
364BOOT: 1181BOOT:
365{ 1182{
366 if (pipe (respipe)) 1183 HV *stash = gv_stashpv ("IO::AIO", 1);
367 croak ("unable to initialize result pipe");
368 1184
369 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1185 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
370 croak ("cannot set result pipe to nonblocking mode"); 1186 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1187 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1188 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1189 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1190 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
371 1191
372 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 1192 create_pipe ();
373 croak ("cannot set result pipe to nonblocking mode"); 1193 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
374}
375 1194
1195 start_thread ();
1196}
1197
376void 1198void
377min_parallel(nthreads) 1199min_parallel (int nthreads)
378 int nthreads 1200 PROTOTYPE: $
1201
1202void
1203max_parallel (int nthreads)
1204 PROTOTYPE: $
1205
1206int
1207max_outstanding (int maxreqs)
379 PROTOTYPE: $ 1208 PROTOTYPE: $
380 CODE: 1209 CODE:
381 while (nthreads > started) 1210 RETVAL = max_outstanding;
382 start_thread (); 1211 max_outstanding = maxreqs;
1212 OUTPUT:
1213 RETVAL
383 1214
384void 1215void
385max_parallel(nthreads)
386 int nthreads
387 PROTOTYPE: $
388 CODE:
389{
390 int cur = started;
391 while (cur > nthreads)
392 {
393 end_thread ();
394 cur--;
395 }
396
397 while (started > nthreads)
398 {
399 poll_wait ();
400 poll_cb (aTHX);
401 }
402}
403
404void
405aio_open(pathname,flags,mode,callback) 1216aio_open (pathname,flags,mode,callback=&PL_sv_undef)
406 SV * pathname 1217 SV * pathname
407 int flags 1218 int flags
408 int mode 1219 int mode
409 SV * callback 1220 SV * callback
410 PROTOTYPE: $$$$ 1221 PROTOTYPE: $$$;$
411 CODE: 1222 PPCODE:
412{ 1223{
413 aio_req req; 1224 dREQ;
414
415 Newz (0, req, 1, aio_cb);
416
417 if (!req)
418 croak ("out of memory during aio_req allocation");
419 1225
420 req->type = REQ_OPEN; 1226 req->type = REQ_OPEN;
421 req->data = newSVsv (pathname); 1227 req->data = newSVsv (pathname);
422 req->dataptr = SvPV_nolen (req->data); 1228 req->dataptr = SvPVbyte_nolen (req->data);
423 req->fd = flags; 1229 req->fd = flags;
424 req->mode = mode; 1230 req->mode = mode;
425 req->callback = SvREFCNT_inc (callback);
426 1231
427 send_req (req); 1232 REQ_SEND;
428} 1233}
429 1234
430void 1235void
431aio_close(fh,callback) 1236aio_close (fh,callback=&PL_sv_undef)
432 InputStream fh 1237 SV * fh
433 SV * callback 1238 SV * callback
434 PROTOTYPE: $$ 1239 PROTOTYPE: $;$
435 ALIAS: 1240 ALIAS:
436 aio_close = REQ_CLOSE 1241 aio_close = REQ_CLOSE
437 aio_fsync = REQ_FSYNC 1242 aio_fsync = REQ_FSYNC
438 aio_fdatasync = REQ_FDATASYNC 1243 aio_fdatasync = REQ_FDATASYNC
439 CODE: 1244 PPCODE:
1245{
1246 dREQ;
1247
1248 req->type = ix;
1249 req->fh = newSVsv (fh);
1250 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1251
1252 REQ_SEND (req);
1253}
1254
1255void
1256aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1257 SV * fh
1258 UV offset
1259 UV length
1260 SV * data
1261 UV dataoffset
1262 SV * callback
1263 ALIAS:
1264 aio_read = REQ_READ
1265 aio_write = REQ_WRITE
1266 PROTOTYPE: $$$$$;$
1267 PPCODE:
440{ 1268{
441 aio_req req; 1269 aio_req req;
1270 STRLEN svlen;
1271 char *svptr = SvPVbyte (data, svlen);
442 1272
443 Newz (0, req, 1, aio_cb); 1273 SvUPGRADE (data, SVt_PV);
1274 SvPOK_on (data);
444 1275
445 if (!req) 1276 if (dataoffset < 0)
446 croak ("out of memory during aio_req allocation"); 1277 dataoffset += svlen;
447 1278
448 req->type = ix; 1279 if (dataoffset < 0 || dataoffset > svlen)
449 req->fd = PerlIO_fileno (fh); 1280 croak ("data offset outside of string");
450 req->callback = SvREFCNT_inc (callback);
451 1281
452 send_req (req); 1282 if (ix == REQ_WRITE)
453} 1283 {
454 1284 /* write: check length and adjust. */
455void 1285 if (length < 0 || length + dataoffset > svlen)
456aio_read(fh,offset,length,data,dataoffset,callback) 1286 length = svlen - dataoffset;
457 InputStream fh 1287 }
458 UV offset 1288 else
459 IV length 1289 {
460 SV * data 1290 /* read: grow scalar as necessary */
461 IV dataoffset 1291 svptr = SvGROW (data, length + dataoffset);
462 SV * callback 1292 }
463 PROTOTYPE: $$$$$$
464 CODE:
465 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
466
467void
468aio_write(fh,offset,length,data,dataoffset,callback)
469 OutputStream fh
470 UV offset
471 IV length
472 SV * data
473 IV dataoffset
474 SV * callback
475 PROTOTYPE: $$$$$$
476 CODE:
477 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
478
479void
480aio_readahead(fh,offset,length,callback)
481 InputStream fh
482 UV offset
483 IV length
484 SV * callback
485 PROTOTYPE: $$$$
486 CODE:
487{
488 aio_req req;
489 1293
490 if (length < 0) 1294 if (length < 0)
491 croak ("length must not be negative"); 1295 croak ("length must not be negative");
492 1296
493 Newz (0, req, 1, aio_cb); 1297 {
1298 dREQ;
494 1299
495 if (!req) 1300 req->type = ix;
496 croak ("out of memory during aio_req allocation"); 1301 req->fh = newSVsv (fh);
1302 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1303 : IoOFP (sv_2io (fh)));
1304 req->offset = offset;
1305 req->length = length;
1306 req->data = SvREFCNT_inc (data);
1307 req->dataptr = (char *)svptr + dataoffset;
1308
1309 if (!SvREADONLY (data))
1310 {
1311 SvREADONLY_on (data);
1312 req->data2ptr = (void *)data;
1313 }
1314
1315 REQ_SEND;
1316 }
1317}
1318
1319void
1320aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1321 SV * out_fh
1322 SV * in_fh
1323 UV in_offset
1324 UV length
1325 SV * callback
1326 PROTOTYPE: $$$$;$
1327 PPCODE:
1328{
1329 dREQ;
1330
1331 req->type = REQ_SENDFILE;
1332 req->fh = newSVsv (out_fh);
1333 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1334 req->fh2 = newSVsv (in_fh);
1335 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1336 req->offset = in_offset;
1337 req->length = length;
1338
1339 REQ_SEND;
1340}
1341
1342void
1343aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1344 SV * fh
1345 UV offset
1346 IV length
1347 SV * callback
1348 PROTOTYPE: $$$;$
1349 PPCODE:
1350{
1351 dREQ;
497 1352
498 req->type = REQ_READAHEAD; 1353 req->type = REQ_READAHEAD;
1354 req->fh = newSVsv (fh);
499 req->fd = PerlIO_fileno (fh); 1355 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
500 req->offset = offset; 1356 req->offset = offset;
501 req->length = length; 1357 req->length = length;
502 req->callback = SvREFCNT_inc (callback);
503 1358
504 send_req (req); 1359 REQ_SEND;
505} 1360}
506 1361
507void 1362void
508aio_stat(fh_or_path,callback) 1363aio_stat (fh_or_path,callback=&PL_sv_undef)
509 SV * fh_or_path 1364 SV * fh_or_path
510 SV * callback 1365 SV * callback
511 PROTOTYPE: $$
512 ALIAS: 1366 ALIAS:
1367 aio_stat = REQ_STAT
513 aio_lstat = 1 1368 aio_lstat = REQ_LSTAT
514 CODE: 1369 PPCODE:
515{ 1370{
516 aio_req req; 1371 dREQ;
517
518 Newz (0, req, 1, aio_cb);
519
520 if (!req)
521 croak ("out of memory during aio_req allocation");
522 1372
523 New (0, req->statdata, 1, Stat_t); 1373 New (0, req->statdata, 1, Stat_t);
524
525 if (!req->statdata) 1374 if (!req->statdata)
1375 {
1376 req_free (req);
526 croak ("out of memory during aio_req->statdata allocation"); 1377 croak ("out of memory during aio_req->statdata allocation");
1378 }
527 1379
528 if (SvPOK (fh_or_path)) 1380 if (SvPOK (fh_or_path))
529 { 1381 {
530 req->type = ix ? REQ_LSTAT : REQ_STAT; 1382 req->type = ix;
531 req->data = newSVsv (fh_or_path); 1383 req->data = newSVsv (fh_or_path);
532 req->dataptr = SvPV_nolen (req->data); 1384 req->dataptr = SvPVbyte_nolen (req->data);
533 } 1385 }
534 else 1386 else
535 { 1387 {
536 req->type = REQ_FSTAT; 1388 req->type = REQ_FSTAT;
1389 req->fh = newSVsv (fh_or_path);
537 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1390 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
538 } 1391 }
539 1392
540 req->callback = SvREFCNT_inc (callback); 1393 REQ_SEND;
541
542 send_req (req);
543} 1394}
544 1395
545void 1396void
546aio_unlink(pathname,callback) 1397aio_unlink (pathname,callback=&PL_sv_undef)
547 SV * pathname 1398 SV * pathname
548 SV * callback 1399 SV * callback
1400 ALIAS:
1401 aio_unlink = REQ_UNLINK
1402 aio_rmdir = REQ_RMDIR
1403 aio_readdir = REQ_READDIR
1404 PPCODE:
1405{
1406 dREQ;
1407
1408 req->type = ix;
1409 req->data = newSVsv (pathname);
1410 req->dataptr = SvPVbyte_nolen (req->data);
1411
1412 REQ_SEND;
1413}
1414
1415void
1416aio_link (oldpath,newpath,callback=&PL_sv_undef)
1417 SV * oldpath
1418 SV * newpath
1419 SV * callback
1420 ALIAS:
1421 aio_link = REQ_LINK
1422 aio_symlink = REQ_SYMLINK
1423 aio_rename = REQ_RENAME
1424 PPCODE:
1425{
1426 dREQ;
1427
1428 req->type = ix;
1429 req->fh = newSVsv (oldpath);
1430 req->data2ptr = SvPVbyte_nolen (req->fh);
1431 req->data = newSVsv (newpath);
1432 req->dataptr = SvPVbyte_nolen (req->data);
1433
1434 REQ_SEND;
1435}
1436
1437void
1438aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1439 SV * pathname
1440 SV * callback
1441 UV mode
1442 UV dev
1443 PPCODE:
1444{
1445 dREQ;
1446
1447 req->type = REQ_MKNOD;
1448 req->data = newSVsv (pathname);
1449 req->dataptr = SvPVbyte_nolen (req->data);
1450 req->mode = (mode_t)mode;
1451 req->offset = dev;
1452
1453 REQ_SEND;
1454}
1455
1456void
1457aio_busy (delay,callback=&PL_sv_undef)
1458 double delay
1459 SV * callback
1460 PPCODE:
1461{
1462 dREQ;
1463
1464 req->type = REQ_BUSY;
1465 req->fd = delay < 0. ? 0 : delay;
1466 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1467
1468 REQ_SEND;
1469}
1470
1471void
1472aio_group (callback=&PL_sv_undef)
1473 SV * callback
549 PROTOTYPE: $$ 1474 PROTOTYPE: ;$
1475 PPCODE:
1476{
1477 dREQ;
1478
1479 req->type = REQ_GROUP;
1480 req_send (req);
1481
1482 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1483}
1484
1485void
1486aio_nop (callback=&PL_sv_undef)
1487 SV * callback
1488 PPCODE:
1489{
1490 dREQ;
1491
1492 req->type = REQ_NOP;
1493
1494 REQ_SEND;
1495}
1496
1497int
1498aioreq_pri (int pri = 0)
1499 PROTOTYPE: ;$
550 CODE: 1500 CODE:
551{ 1501 RETVAL = next_pri - PRI_BIAS;
552 aio_req req; 1502 if (items > 0)
553 1503 {
554 Newz (0, req, 1, aio_cb); 1504 if (pri < PRI_MIN) pri = PRI_MIN;
555 1505 if (pri > PRI_MAX) pri = PRI_MAX;
556 if (!req) 1506 next_pri = pri + PRI_BIAS;
557 croak ("out of memory during aio_req allocation"); 1507 }
558 1508 OUTPUT:
559 req->type = REQ_UNLINK; 1509 RETVAL
560 req->data = newSVsv (pathname); 1510
561 req->dataptr = SvPV_nolen (req->data); 1511void
562 req->callback = SvREFCNT_inc (callback); 1512aioreq_nice (int nice = 0)
563 1513 CODE:
564 send_req (req); 1514 nice = next_pri - nice;
565} 1515 if (nice < PRI_MIN) nice = PRI_MIN;
1516 if (nice > PRI_MAX) nice = PRI_MAX;
1517 next_pri = nice + PRI_BIAS;
1518
1519void
1520flush ()
1521 PROTOTYPE:
1522 CODE:
1523 while (nreqs)
1524 {
1525 poll_wait ();
1526 poll_cb (0);
1527 }
1528
1529void
1530poll()
1531 PROTOTYPE:
1532 CODE:
1533 if (nreqs)
1534 {
1535 poll_wait ();
1536 poll_cb (0);
1537 }
566 1538
567int 1539int
568poll_fileno() 1540poll_fileno()
569 PROTOTYPE: 1541 PROTOTYPE:
570 CODE: 1542 CODE:
… …
574 1546
575int 1547int
576poll_cb(...) 1548poll_cb(...)
577 PROTOTYPE: 1549 PROTOTYPE:
578 CODE: 1550 CODE:
1551 RETVAL = poll_cb (0);
1552 OUTPUT:
1553 RETVAL
1554
1555int
1556poll_some(int max = 0)
1557 PROTOTYPE: $
1558 CODE:
579 RETVAL = poll_cb (aTHX); 1559 RETVAL = poll_cb (max);
580 OUTPUT: 1560 OUTPUT:
581 RETVAL 1561 RETVAL
582 1562
583void 1563void
584poll_wait() 1564poll_wait()
… …
593 CODE: 1573 CODE:
594 RETVAL = nreqs; 1574 RETVAL = nreqs;
595 OUTPUT: 1575 OUTPUT:
596 RETVAL 1576 RETVAL
597 1577
1578int
1579nready()
1580 PROTOTYPE:
1581 CODE:
1582 RETVAL = get_nready ();
1583 OUTPUT:
1584 RETVAL
1585
1586int
1587npending()
1588 PROTOTYPE:
1589 CODE:
1590 RETVAL = get_npending ();
1591 OUTPUT:
1592 RETVAL
1593
1594PROTOTYPES: DISABLE
1595
1596MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1597
1598void
1599cancel (aio_req_ornot req)
1600 CODE:
1601 req_cancel (req);
1602
1603void
1604cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1605 CODE:
1606 SvREFCNT_dec (req->callback);
1607 req->callback = newSVsv (callback);
1608
1609MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1610
1611void
1612add (aio_req grp, ...)
1613 PPCODE:
1614{
1615 int i;
1616 aio_req req;
1617
1618 if (grp->fd == 2)
1619 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1620
1621 for (i = 1; i < items; ++i )
1622 {
1623 if (GIMME_V != G_VOID)
1624 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1625
1626 req = SvAIO_REQ (ST (i));
1627
1628 if (req)
1629 {
1630 ++grp->length;
1631 req->grp = grp;
1632
1633 req->grp_prev = 0;
1634 req->grp_next = grp->grp_first;
1635
1636 if (grp->grp_first)
1637 grp->grp_first->grp_prev = req;
1638
1639 grp->grp_first = req;
1640 }
1641 }
1642}
1643
1644void
1645cancel_subs (aio_req_ornot req)
1646 CODE:
1647 req_cancel_subs (req);
1648
1649void
1650result (aio_req grp, ...)
1651 CODE:
1652{
1653 int i;
1654 AV *av;
1655
1656 grp->errorno = errno;
1657
1658 av = newAV ();
1659
1660 for (i = 1; i < items; ++i )
1661 av_push (av, newSVsv (ST (i)));
1662
1663 SvREFCNT_dec (grp->data);
1664 grp->data = (SV *)av;
1665}
1666
1667void
1668errno (aio_req grp, int errorno = errno)
1669 CODE:
1670 grp->errorno = errorno;
1671
1672void
1673limit (aio_req grp, int limit)
1674 CODE:
1675 grp->fd2 = limit;
1676 aio_grp_feed (grp);
1677
1678void
1679feed (aio_req grp, SV *callback=&PL_sv_undef)
1680 CODE:
1681{
1682 SvREFCNT_dec (grp->fh2);
1683 grp->fh2 = newSVsv (callback);
1684
1685 if (grp->fd2 <= 0)
1686 grp->fd2 = 2;
1687
1688 aio_grp_feed (grp);
1689}
1690

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