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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.10 by root, Wed Jul 13 00:13:09 2005 UTC vs.
Revision 1.78 by root, Thu Oct 26 14:35:34 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
5#define _XOPEN_SOURCE 500 17#include "autoconf/config.h"
6 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>
9 27#include <limits.h>
10#include <unistd.h> 28#include <unistd.h>
11#include <fcntl.h> 29#include <fcntl.h>
12#include <signal.h> 30#include <signal.h>
13#include <sched.h> 31#include <sched.h>
32
33#if HAVE_SENDFILE
14#if __linux 34# if __linux
35# include <sys/sendfile.h>
36# elif __freebsd
15#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
16#endif 45# endif
46#endif
17 47
18#include <pthread.h> 48/* used for struct dirent, AIX doesn't provide it */
49#ifndef NAME_MAX
50# define NAME_MAX 4096
51#endif
19 52
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 53#ifndef PTHREAD_STACK_MIN
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 54/* care for broken platforms, e.g. windows */
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 55# define PTHREAD_STACK_MIN 16384
56#endif
23 57
24#if __ia64 58#if __ia64
25# define STACKSIZE 65536 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 4096 63# define STACKSIZE 16384
28#endif 64#endif
65
66/* buffer size for various temporary buffers */
67#define AIO_BUFSIZE 65536
68
69#define dBUF \
70 char *aio_buf; \
71 LOCK (wrklock); \
72 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
73 UNLOCK (wrklock); \
74 if (!aio_buf) \
75 return -1;
29 76
30enum { 77enum {
31 REQ_QUIT, 78 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 79 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 80 REQ_READ, REQ_WRITE, REQ_READAHEAD,
81 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 82 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 83 REQ_FSYNC, REQ_FDATASYNC,
84 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
85 REQ_READDIR,
86 REQ_LINK, REQ_SYMLINK,
87 REQ_GROUP, REQ_NOP,
88 REQ_BUSY,
36}; 89};
37 90
91#define AIO_REQ_KLASS "IO::AIO::REQ"
92#define AIO_GRP_KLASS "IO::AIO::GRP"
93
38typedef struct aio_cb { 94typedef struct aio_cb
95{
39 struct aio_cb *volatile next; 96 struct aio_cb *volatile next;
40 97
41 int type; 98 SV *data, *callback;
42 99 SV *fh, *fh2;
43 int fd; 100 void *dataptr, *data2ptr;
101 Stat_t *statdata;
44 off_t offset; 102 off_t offset;
45 size_t length; 103 size_t length;
46 ssize_t result; 104 ssize_t result;
105
106 STRLEN dataoffset;
107 int type;
108 int fd, fd2;
109 int errorno;
47 mode_t mode; /* open */ 110 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 111
53 Stat_t *statdata; 112 unsigned char flags;
113 unsigned char pri;
114
115 SV *self; /* the perl counterpart of this request, if any */
116 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 117} aio_cb;
55 118
119enum {
120 FLAG_CANCELLED = 0x01,
121};
122
56typedef aio_cb *aio_req; 123typedef aio_cb *aio_req;
124typedef aio_cb *aio_req_ornot;
57 125
58static int started; 126enum {
59static int nreqs; 127 PRI_MIN = -4,
60static int max_outstanding = 1<<30; 128 PRI_MAX = 4,
129
130 DEFAULT_PRI = 0,
131 PRI_BIAS = -PRI_MIN,
132 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
133};
134
135static int next_pri = DEFAULT_PRI + PRI_BIAS;
136
137static unsigned int started, wanted;
138static volatile unsigned int nreqs;
139static volatile unsigned int max_outstanding = 0xffffffff;
61static int respipe [2]; 140static int respipe [2];
62 141
142#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
143# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
144#else
145# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
146#endif
147
148#define LOCK(mutex) pthread_mutex_lock (&(mutex))
149#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
150
151/* worker threads management */
152static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
153
154typedef struct worker {
155 /* locked by wrklock */
156 struct worker *prev, *next;
157
158 pthread_t tid;
159
160 /* locked by reslock, reqlock or wrklock */
161 aio_req req; /* currently processed request */
162 void *dbuf;
163 DIR *dirp;
164} worker;
165
166static worker wrk_first = { &wrk_first, &wrk_first, 0 };
167
168static void worker_clear (worker *wrk)
169{
170 if (wrk->dirp)
171 {
172 closedir (wrk->dirp);
173 wrk->dirp = 0;
174 }
175
176 if (wrk->dbuf)
177 {
178 free (wrk->dbuf);
179 wrk->dbuf = 0;
180 }
181}
182
183static void worker_free (worker *wrk)
184{
185 wrk->next->prev = wrk->prev;
186 wrk->prev->next = wrk->next;
187
188 free (wrk);
189}
190
63static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 191static pthread_mutex_t reslock = AIO_MUTEX_INIT;
64static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 192static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
65static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 193static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66 194
67static volatile aio_req reqs, reqe; /* queue start, queue end */ 195/*
68static volatile aio_req ress, rese; /* queue start, queue end */ 196 * a somewhat faster data structure might be nice, but
197 * with 8 priorities this actually needs <20 insns
198 * per shift, the most expensive operation.
199 */
200typedef struct {
201 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
202 int size;
203} reqq;
69 204
70static void 205static reqq req_queue;
71poll_wait () 206static reqq res_queue;
207
208int reqq_push (reqq *q, aio_req req)
72{ 209{
73 if (!nreqs) 210 int pri = req->pri;
211 req->next = 0;
212
213 if (q->qe[pri])
214 {
215 q->qe[pri]->next = req;
216 q->qe[pri] = req;
217 }
218 else
219 q->qe[pri] = q->qs[pri] = req;
220
221 return q->size++;
222}
223
224aio_req reqq_shift (reqq *q)
225{
226 int pri;
227
228 if (!q->size)
74 return; 229 return 0;
75 230
231 --q->size;
232
233 for (pri = NUM_PRI; pri--; )
234 {
235 aio_req req = q->qs[pri];
236
237 if (req)
238 {
239 if (!(q->qs[pri] = req->next))
240 q->qe[pri] = 0;
241
242 return req;
243 }
244 }
245
246 abort ();
247}
248
249static int poll_cb (int max);
250static void req_invoke (aio_req req);
251static void req_free (aio_req req);
252static void req_cancel (aio_req req);
253
254/* must be called at most once */
255static SV *req_sv (aio_req req, const char *klass)
256{
257 if (!req->self)
258 {
259 req->self = (SV *)newHV ();
260 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
261 }
262
263 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
264}
265
266static aio_req SvAIO_REQ (SV *sv)
267{
268 MAGIC *mg;
269
270 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
271 croak ("object of class " AIO_REQ_KLASS " expected");
272
273 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
274
275 return mg ? (aio_req)mg->mg_ptr : 0;
276}
277
278static void aio_grp_feed (aio_req grp)
279{
280 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
281 {
282 int old_len = grp->length;
283
284 if (grp->fh2 && SvOK (grp->fh2))
285 {
286 dSP;
287
288 ENTER;
289 SAVETMPS;
290 PUSHMARK (SP);
291 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
292 PUTBACK;
293 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
294 SPAGAIN;
295 FREETMPS;
296 LEAVE;
297 }
298
299 /* stop if no progress has been made */
300 if (old_len == grp->length)
301 {
302 SvREFCNT_dec (grp->fh2);
303 grp->fh2 = 0;
304 break;
305 }
306 }
307}
308
309static void aio_grp_dec (aio_req grp)
310{
311 --grp->length;
312
313 /* call feeder, if applicable */
314 aio_grp_feed (grp);
315
316 /* finish, if done */
317 if (!grp->length && grp->fd)
318 {
319 req_invoke (grp);
320 req_free (grp);
321 }
322}
323
324static void poll_wait ()
325{
76 fd_set rfd; 326 fd_set rfd;
327
328 while (nreqs)
329 {
330 int size;
331#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
332 LOCK (reslock);
333#endif
334 size = res_queue.size;
335#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
336 UNLOCK (reslock);
337#endif
338
339 if (size)
340 return;
341
77 FD_ZERO(&rfd); 342 FD_ZERO(&rfd);
78 FD_SET(respipe [0], &rfd); 343 FD_SET(respipe [0], &rfd);
79 344
80 select (respipe [0] + 1, &rfd, 0, 0, 0); 345 select (respipe [0] + 1, &rfd, 0, 0, 0);
346 }
81} 347}
82 348
83static int 349static void req_invoke (aio_req req)
84poll_cb ()
85{ 350{
86 dSP; 351 dSP;
87 int count = 0; 352
88 aio_req req; 353 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
89
90 { 354 {
91 /* read and signals sent by the worker threads */ 355 errno = req->errorno;
92 char buf [32];
93 while (read (respipe [0], buf, 32) > 0)
94 ;
95 }
96 356
97 for (;;) 357 ENTER;
98 { 358 SAVETMPS;
99 pthread_mutex_lock (&reslock); 359 PUSHMARK (SP);
360 EXTEND (SP, 1);
100 361
101 req = ress; 362 switch (req->type)
102
103 if (ress)
104 { 363 {
105 ress = ress->next; 364 case REQ_READDIR:
106 if (!ress) rese = 0;
107 }
108
109 pthread_mutex_unlock (&reslock);
110
111 if (!req)
112 break;
113
114 nreqs--;
115
116 if (req->type == REQ_QUIT)
117 started--;
118 else
119 {
120 int errorno = errno;
121 errno = req->errorno;
122
123 if (req->type == REQ_READ)
124 SvCUR_set (req->data, req->dataoffset
125 + req->result > 0 ? req->result : 0);
126
127 if (req->data)
128 SvREFCNT_dec (req->data);
129
130 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
131 { 365 {
132 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 366 SV *rv = &PL_sv_undef;
133 PL_laststatval = req->result;
134 PL_statcache = *(req->statdata);
135 367
136 Safefree (req->statdata); 368 if (req->result >= 0)
369 {
370 int i;
371 char *buf = req->data2ptr;
372 AV *av = newAV ();
373
374 av_extend (av, req->result - 1);
375
376 for (i = 0; i < req->result; ++i)
377 {
378 SV *sv = newSVpv (buf, 0);
379
380 av_store (av, i, sv);
381 buf += SvCUR (sv) + 1;
382 }
383
384 rv = sv_2mortal (newRV_noinc ((SV *)av));
385 }
386
387 PUSHs (rv);
137 } 388 }
389 break;
138 390
139 PUSHMARK (SP); 391 case REQ_OPEN:
140 XPUSHs (sv_2mortal (newSViv (req->result)));
141
142 if (req->type == REQ_OPEN)
143 { 392 {
144 /* convert fd to fh */ 393 /* convert fd to fh */
145 SV *fh; 394 SV *fh;
146 395
396 PUSHs (sv_2mortal (newSViv (req->result)));
147 PUTBACK; 397 PUTBACK;
148 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 398 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149 SPAGAIN; 399 SPAGAIN;
150 400
151 fh = POPs; 401 fh = SvREFCNT_inc (POPs);
152 402
153 PUSHMARK (SP); 403 PUSHMARK (SP);
154 XPUSHs (fh); 404 XPUSHs (sv_2mortal (fh));
155 } 405 }
406 break;
156 407
157 if (SvOK (req->callback)) 408 case REQ_GROUP:
409 req->fd = 2; /* mark group as finished */
410
411 if (req->data)
412 {
413 int i;
414 AV *av = (AV *)req->data;
415
416 EXTEND (SP, AvFILL (av) + 1);
417 for (i = 0; i <= AvFILL (av); ++i)
418 PUSHs (*av_fetch (av, i, 0));
419 }
420 break;
421
422 case REQ_NOP:
423 case REQ_BUSY:
424 break;
425
426 default:
427 PUSHs (sv_2mortal (newSViv (req->result)));
428 break;
429 }
430
431
432 PUTBACK;
433 call_sv (req->callback, G_VOID | G_EVAL);
434 SPAGAIN;
435
436 FREETMPS;
437 LEAVE;
438 }
439
440 if (req->grp)
441 {
442 aio_req grp = req->grp;
443
444 /* unlink request */
445 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
446 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
447
448 if (grp->grp_first == req)
449 grp->grp_first = req->grp_next;
450
451 aio_grp_dec (grp);
452 }
453
454 if (SvTRUE (ERRSV))
455 {
456 req_free (req);
457 croak (0);
458 }
459}
460
461static void req_free (aio_req req)
462{
463 if (req->self)
464 {
465 sv_unmagic (req->self, PERL_MAGIC_ext);
466 SvREFCNT_dec (req->self);
467 }
468
469 SvREFCNT_dec (req->data);
470 SvREFCNT_dec (req->fh);
471 SvREFCNT_dec (req->fh2);
472 SvREFCNT_dec (req->callback);
473 Safefree (req->statdata);
474
475 if (req->type == REQ_READDIR)
476 free (req->data2ptr);
477
478 Safefree (req);
479}
480
481static void req_cancel_subs (aio_req grp)
482{
483 aio_req sub;
484
485 if (grp->type != REQ_GROUP)
486 return;
487
488 SvREFCNT_dec (grp->fh2);
489 grp->fh2 = 0;
490
491 for (sub = grp->grp_first; sub; sub = sub->grp_next)
492 req_cancel (sub);
493}
494
495static void req_cancel (aio_req req)
496{
497 req->flags |= FLAG_CANCELLED;
498
499 req_cancel_subs (req);
500}
501
502static int poll_cb (int max)
503{
504 dSP;
505 int count = 0;
506 int do_croak = 0;
507 aio_req req;
508
509 for (;;)
510 {
511 while (max <= 0 || count < max)
512 {
513 LOCK (reslock);
514 req = reqq_shift (&res_queue);
515
516 if (req)
158 { 517 {
159 PUTBACK; 518 if (!res_queue.size)
160 call_sv (req->callback, G_VOID | G_EVAL); 519 {
161 SPAGAIN; 520 /* read any signals sent by the worker threads */
521 char buf [32];
522 while (read (respipe [0], buf, 32) == 32)
523 ;
524 }
162 } 525 }
526
527 UNLOCK (reslock);
528
529 if (!req)
530 break;
531
532 --nreqs;
533
534 if (req->type == REQ_QUIT)
535 --started;
536 else if (req->type == REQ_GROUP && req->length)
163 537 {
164 if (req->callback) 538 req->fd = 1; /* mark request as delayed */
165 SvREFCNT_dec (req->callback); 539 continue;
540 }
541 else
542 {
543 if (req->type == REQ_READ)
544 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
166 545
167 errno = errorno; 546 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
547 SvREADONLY_off (req->data);
548
549 if (req->statdata)
550 {
551 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
552 PL_laststatval = req->result;
553 PL_statcache = *(req->statdata);
554 }
555
556 req_invoke (req);
557
168 count++; 558 count++;
559 }
560
561 req_free (req);
169 } 562 }
170 563
171 Safefree (req); 564 if (nreqs <= max_outstanding)
565 break;
566
567 poll_wait ();
568
569 max = 0;
172 } 570 }
173 571
174 return count; 572 return count;
175} 573}
176 574
177static void *aio_proc(void *arg); 575static void *aio_proc(void *arg);
178 576
179static void
180start_thread (void) 577static void start_thread (void)
181{ 578{
182 sigset_t fullsigset, oldsigset; 579 sigset_t fullsigset, oldsigset;
183 pthread_t tid;
184 pthread_attr_t attr; 580 pthread_attr_t attr;
581
582 worker *wrk = calloc (1, sizeof (worker));
583
584 if (!wrk)
585 croak ("unable to allocate worker thread data");
185 586
186 pthread_attr_init (&attr); 587 pthread_attr_init (&attr);
187 pthread_attr_setstacksize (&attr, STACKSIZE); 588 pthread_attr_setstacksize (&attr, STACKSIZE);
188 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 589 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
189 590
190 sigfillset (&fullsigset); 591 sigfillset (&fullsigset);
592
593 LOCK (wrklock);
191 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 594 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
192 595
193 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 596 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
597 {
598 wrk->prev = &wrk_first;
599 wrk->next = wrk_first.next;
600 wrk_first.next->prev = wrk;
601 wrk_first.next = wrk;
194 started++; 602 ++started;
603 }
604 else
605 free (wrk);
195 606
196 sigprocmask (SIG_SETMASK, &oldsigset, 0); 607 sigprocmask (SIG_SETMASK, &oldsigset, 0);
608 UNLOCK (wrklock);
197} 609}
198 610
199static void 611static void req_send (aio_req req)
200send_req (aio_req req)
201{ 612{
613 while (started < wanted && nreqs >= started)
614 start_thread ();
615
202 nreqs++; 616 ++nreqs;
203 617
204 pthread_mutex_lock (&reqlock); 618 LOCK (reqlock);
619 reqq_push (&req_queue, req);
620 pthread_cond_signal (&reqwait);
621 UNLOCK (reqlock);
622}
205 623
206 req->next = 0; 624static void end_thread (void)
625{
626 aio_req req;
207 627
628 Newz (0, req, 1, aio_cb);
629
630 req->type = REQ_QUIT;
631 req->pri = PRI_MAX + PRI_BIAS;
632
633 req_send (req);
634}
635
636static void min_parallel (int nthreads)
637{
638 if (wanted < nthreads)
639 wanted = nthreads;
640}
641
642static void max_parallel (int nthreads)
643{
644 int cur = started;
645
646 if (wanted > nthreads)
647 wanted = nthreads;
648
649 while (cur > wanted)
650 {
651 end_thread ();
652 cur--;
653 }
654
655 while (started > wanted)
656 {
657 poll_wait ();
658 poll_cb (0);
659 }
660}
661
662static void create_pipe ()
663{
664 if (pipe (respipe))
665 croak ("unable to initialize result pipe");
666
667 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
668 croak ("cannot set result pipe to nonblocking mode");
669
670 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
671 croak ("cannot set result pipe to nonblocking mode");
672}
673
674/*****************************************************************************/
675/* work around various missing functions */
676
677#if !HAVE_PREADWRITE
678# define pread aio_pread
679# define pwrite aio_pwrite
680
681/*
682 * make our pread/pwrite safe against themselves, but not against
683 * normal read/write by using a mutex. slows down execution a lot,
684 * but that's your problem, not mine.
685 */
686static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
687
688static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
689{
690 ssize_t res;
691 off_t ooffset;
692
693 LOCK (preadwritelock);
694 ooffset = lseek (fd, 0, SEEK_CUR);
695 lseek (fd, offset, SEEK_SET);
696 res = read (fd, buf, count);
697 lseek (fd, ooffset, SEEK_SET);
698 UNLOCK (preadwritelock);
699
700 return res;
701}
702
703static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
704{
705 ssize_t res;
706 off_t ooffset;
707
708 LOCK (preadwritelock);
709 ooffset = lseek (fd, 0, SEEK_CUR);
710 lseek (fd, offset, SEEK_SET);
711 res = write (fd, buf, count);
712 lseek (fd, offset, SEEK_SET);
713 UNLOCK (preadwritelock);
714
715 return res;
716}
717#endif
718
719#if !HAVE_FDATASYNC
720# define fdatasync fsync
721#endif
722
723#if !HAVE_READAHEAD
724# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
725
726static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
727{
728 dBUF;
729
730 while (count > 0)
731 {
732 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
733
734 pread (fd, aio_buf, len, offset);
735 offset += len;
736 count -= len;
737 }
738
739 errno = 0;
740}
741
742#endif
743
744#if !HAVE_READDIR_R
745# define readdir_r aio_readdir_r
746
747static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
748
749static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
750{
751 struct dirent *e;
752 int errorno;
753
754 LOCK (readdirlock);
755
756 e = readdir (dirp);
757 errorno = errno;
758
208 if (reqe) 759 if (e)
209 { 760 {
210 reqe->next = req; 761 *res = ent;
211 reqe = req; 762 strcpy (ent->d_name, e->d_name);
212 } 763 }
213 else 764 else
214 reqe = reqs = req; 765 *res = 0;
215 766
216 pthread_cond_signal (&reqwait); 767 UNLOCK (readdirlock);
217 pthread_mutex_unlock (&reqlock);
218 768
219 while (nreqs > max_outstanding) 769 errno = errorno;
770 return e ? 0 : -1;
771}
772#endif
773
774/* sendfile always needs emulation */
775static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
776{
777 ssize_t res;
778
779 if (!count)
780 return 0;
781
782#if HAVE_SENDFILE
783# if __linux
784 res = sendfile (ofd, ifd, &offset, count);
785
786# elif __freebsd
787 /*
788 * Of course, the freebsd sendfile is a dire hack with no thoughts
789 * wasted on making it similar to other I/O functions.
790 */
791 {
792 off_t sbytes;
793 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
794
795 if (res < 0 && sbytes)
796 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
797 res = sbytes;
798 }
799
800# elif __hpux
801 res = sendfile (ofd, ifd, offset, count, 0, 0);
802
803# elif __solaris
804 {
805 struct sendfilevec vec;
806 size_t sbytes;
807
808 vec.sfv_fd = ifd;
809 vec.sfv_flag = 0;
810 vec.sfv_off = offset;
811 vec.sfv_len = count;
812
813 res = sendfilev (ofd, &vec, 1, &sbytes);
814
815 if (res < 0 && sbytes)
816 res = sbytes;
817 }
818
819# endif
820#else
821 res = -1;
822 errno = ENOSYS;
823#endif
824
825 if (res < 0
826 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
827#if __solaris
828 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
829#endif
830 )
831 )
832 {
833 /* emulate sendfile. this is a major pain in the ass */
834 dBUF;
835
836 res = 0;
837
838 while (count)
839 {
840 ssize_t cnt;
841
842 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
843
844 if (cnt <= 0)
845 {
846 if (cnt && !res) res = -1;
847 break;
848 }
849
850 cnt = write (ofd, aio_buf, cnt);
851
852 if (cnt <= 0)
853 {
854 if (cnt && !res) res = -1;
855 break;
856 }
857
858 offset += cnt;
859 res += cnt;
860 count -= cnt;
861 }
862 }
863
864 return res;
865}
866
867/* read a full directory */
868static void scandir_ (aio_req req, worker *self)
869{
870 DIR *dirp;
871 union
872 {
873 struct dirent d;
874 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
875 } *u;
876 struct dirent *entp;
877 char *name, *names;
878 int memlen = 4096;
879 int memofs = 0;
880 int res = 0;
881 int errorno;
882
883 LOCK (wrklock);
884 self->dirp = dirp = opendir (req->dataptr);
885 self->dbuf = u = malloc (sizeof (*u));
886 req->data2ptr = names = malloc (memlen);
887 UNLOCK (wrklock);
888
889 if (dirp && u && names)
890 for (;;)
220 { 891 {
221 poll_wait (); 892 errno = 0;
222 poll_cb (); 893 readdir_r (dirp, &u->d, &entp);
894
895 if (!entp)
896 break;
897
898 name = entp->d_name;
899
900 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
901 {
902 int len = strlen (name) + 1;
903
904 res++;
905
906 while (memofs + len > memlen)
907 {
908 memlen *= 2;
909 LOCK (wrklock);
910 req->data2ptr = names = realloc (names, memlen);
911 UNLOCK (wrklock);
912
913 if (!names)
914 break;
915 }
916
917 memcpy (names + memofs, name, len);
918 memofs += len;
919 }
223 } 920 }
224}
225 921
226static void 922 if (errno)
227end_thread (void) 923 res = -1;
228{ 924
229 aio_req req; 925 req->result = res;
230 New (0, req, 1, aio_cb);
231 req->type = REQ_QUIT;
232
233 send_req (req);
234} 926}
235 927
236static void 928/*****************************************************************************/
237read_write (int dowrite, int fd, off_t offset, size_t length,
238 SV *data, STRLEN dataoffset, SV *callback)
239{
240 aio_req req;
241 STRLEN svlen;
242 char *svptr = SvPV (data, svlen);
243 929
244 SvUPGRADE (data, SVt_PV);
245 SvPOK_on (data);
246
247 if (dataoffset < 0)
248 dataoffset += svlen;
249
250 if (dataoffset < 0 || dataoffset > svlen)
251 croak ("data offset outside of string");
252
253 if (dowrite)
254 {
255 /* write: check length and adjust. */
256 if (length < 0 || length + dataoffset > svlen)
257 length = svlen - dataoffset;
258 }
259 else
260 {
261 /* read: grow scalar as necessary */
262 svptr = SvGROW (data, length + dataoffset);
263 }
264
265 if (length < 0)
266 croak ("length must not be negative");
267
268 Newz (0, req, 1, aio_cb);
269
270 if (!req)
271 croak ("out of memory during aio_req allocation");
272
273 req->type = dowrite ? REQ_WRITE : REQ_READ;
274 req->fd = fd;
275 req->offset = offset;
276 req->length = length;
277 req->data = SvREFCNT_inc (data);
278 req->dataptr = (char *)svptr + dataoffset;
279 req->callback = SvREFCNT_inc (callback);
280
281 send_req (req);
282}
283
284static void *
285aio_proc (void *thr_arg) 930static void *aio_proc (void *thr_arg)
286{ 931{
287 aio_req req; 932 aio_req req;
288 int type; 933 int type;
934 worker *self = (worker *)thr_arg;
289 935
290 do 936 do
291 { 937 {
292 pthread_mutex_lock (&reqlock); 938 LOCK (reqlock);
293 939
294 for (;;) 940 for (;;)
295 { 941 {
296 req = reqs; 942 self->req = req = reqq_shift (&req_queue);
297
298 if (reqs)
299 {
300 reqs = reqs->next;
301 if (!reqs) reqe = 0;
302 }
303 943
304 if (req) 944 if (req)
305 break; 945 break;
306 946
307 pthread_cond_wait (&reqwait, &reqlock); 947 pthread_cond_wait (&reqwait, &reqlock);
308 } 948 }
309 949
310 pthread_mutex_unlock (&reqlock); 950 UNLOCK (reqlock);
311 951
312 errno = 0; /* strictly unnecessary */ 952 errno = 0; /* strictly unnecessary */
953 type = req->type; /* remember type for QUIT check */
313 954
314 type = req->type; 955 if (!(req->flags & FLAG_CANCELLED))
315
316 switch (type) 956 switch (type)
317 { 957 {
318 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 958 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
319 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 959 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
320#if SYS_readahead 960
321 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 961 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
322#else 962 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
323 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
324#endif
325 963
326 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 964 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
327 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 965 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
328 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 966 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
329 967
330 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 968 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
331 case REQ_CLOSE: req->result = close (req->fd); break; 969 case REQ_CLOSE: req->result = close (req->fd); break;
332 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 970 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
333
334 case REQ_FSYNC: req->result = fsync (req->fd); break; 971 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
972 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
973 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
974 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
975
335 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 976 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
977 case REQ_FSYNC: req->result = fsync (req->fd); break;
978 case REQ_READDIR: scandir_ (req, self); break;
336 979
980 case REQ_BUSY:
981 {
982 struct timeval tv;
983
984 tv.tv_sec = req->fd;
985 tv.tv_usec = req->fd2;
986
987 req->result = select (0, 0, 0, 0, &tv);
988 }
989
990 case REQ_GROUP:
991 case REQ_NOP:
337 case REQ_QUIT: 992 case REQ_QUIT:
338 break; 993 break;
339 994
340 default: 995 default:
341 req->result = ENOSYS; 996 req->result = ENOSYS;
342 break; 997 break;
343 } 998 }
344 999
345 req->errorno = errno; 1000 req->errorno = errno;
346 1001
347 pthread_mutex_lock (&reslock); 1002 LOCK (reslock);
348 1003
349 req->next = 0; 1004 if (!reqq_push (&res_queue, req))
350
351 if (rese)
352 {
353 rese->next = req;
354 rese = req;
355 }
356 else
357 {
358 rese = ress = req;
359
360 /* write a dummy byte to the pipe so fh becomes ready */ 1005 /* write a dummy byte to the pipe so fh becomes ready */
361 write (respipe [1], &respipe, 1); 1006 write (respipe [1], &respipe, 1);
362 }
363 1007
364 pthread_mutex_unlock (&reslock); 1008 self->req = 0;
1009 worker_clear (self);
1010
1011 UNLOCK (reslock);
365 } 1012 }
366 while (type != REQ_QUIT); 1013 while (type != REQ_QUIT);
367 1014
1015 LOCK (wrklock);
1016 worker_free (self);
1017 UNLOCK (wrklock);
1018
368 return 0; 1019 return 0;
369} 1020}
370 1021
1022/*****************************************************************************/
1023
1024static void atfork_prepare (void)
1025{
1026 LOCK (wrklock);
1027 LOCK (reqlock);
1028 LOCK (reslock);
1029#if !HAVE_PREADWRITE
1030 LOCK (preadwritelock);
1031#endif
1032#if !HAVE_READDIR_R
1033 LOCK (readdirlock);
1034#endif
1035}
1036
1037static void atfork_parent (void)
1038{
1039#if !HAVE_READDIR_R
1040 UNLOCK (readdirlock);
1041#endif
1042#if !HAVE_PREADWRITE
1043 UNLOCK (preadwritelock);
1044#endif
1045 UNLOCK (reslock);
1046 UNLOCK (reqlock);
1047 UNLOCK (wrklock);
1048}
1049
1050static void atfork_child (void)
1051{
1052 aio_req prv;
1053
1054 while (prv = reqq_shift (&req_queue))
1055 req_free (prv);
1056
1057 while (prv = reqq_shift (&res_queue))
1058 req_free (prv);
1059
1060 while (wrk_first.next != &wrk_first)
1061 {
1062 worker *wrk = wrk_first.next;
1063
1064 if (wrk->req)
1065 req_free (wrk->req);
1066
1067 worker_clear (wrk);
1068 worker_free (wrk);
1069 }
1070
1071 started = 0;
1072 nreqs = 0;
1073
1074 close (respipe [0]);
1075 close (respipe [1]);
1076 create_pipe ();
1077
1078 atfork_parent ();
1079}
1080
1081#define dREQ \
1082 aio_req req; \
1083 int req_pri = next_pri; \
1084 next_pri = DEFAULT_PRI + PRI_BIAS; \
1085 \
1086 if (SvOK (callback) && !SvROK (callback)) \
1087 croak ("callback must be undef or of reference type"); \
1088 \
1089 Newz (0, req, 1, aio_cb); \
1090 if (!req) \
1091 croak ("out of memory during aio_req allocation"); \
1092 \
1093 req->callback = newSVsv (callback); \
1094 req->pri = req_pri
1095
1096#define REQ_SEND \
1097 req_send (req); \
1098 \
1099 if (GIMME_V != G_VOID) \
1100 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1101
371MODULE = IO::AIO PACKAGE = IO::AIO 1102MODULE = IO::AIO PACKAGE = IO::AIO
372 1103
373PROTOTYPES: ENABLE 1104PROTOTYPES: ENABLE
374 1105
375BOOT: 1106BOOT:
376{ 1107{
377 if (pipe (respipe)) 1108 HV *stash = gv_stashpv ("IO::AIO", 1);
378 croak ("unable to initialize result pipe"); 1109 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1110 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1111 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
379 1112
380 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1113 create_pipe ();
381 croak ("cannot set result pipe to nonblocking mode"); 1114 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
382
383 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
384 croak ("cannot set result pipe to nonblocking mode");
385} 1115}
386 1116
387void 1117void
388min_parallel(nthreads) 1118min_parallel (int nthreads)
389 int nthreads 1119 PROTOTYPE: $
1120
1121void
1122max_parallel (int nthreads)
1123 PROTOTYPE: $
1124
1125int
1126max_outstanding (int maxreqs)
390 PROTOTYPE: $ 1127 PROTOTYPE: $
391 CODE: 1128 CODE:
392 while (nthreads > started)
393 start_thread ();
394
395void
396max_parallel(nthreads)
397 int nthreads
398 PROTOTYPE: $
399 CODE:
400{
401 int cur = started;
402 while (cur > nthreads)
403 {
404 end_thread ();
405 cur--;
406 }
407
408 while (started > nthreads)
409 {
410 poll_wait ();
411 poll_cb ();
412 }
413}
414
415int
416max_outstanding(nreqs)
417 int nreqs
418 PROTOTYPE: $
419 CODE:
420 RETVAL = max_outstanding; 1129 RETVAL = max_outstanding;
421 max_outstanding = nreqs; 1130 max_outstanding = maxreqs;
1131 OUTPUT:
1132 RETVAL
422 1133
423void 1134void
424aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1135aio_open (pathname,flags,mode,callback=&PL_sv_undef)
425 SV * pathname 1136 SV * pathname
426 int flags 1137 int flags
427 int mode 1138 int mode
428 SV * callback 1139 SV * callback
429 PROTOTYPE: $$$;$ 1140 PROTOTYPE: $$$;$
430 CODE: 1141 PPCODE:
431{ 1142{
432 aio_req req; 1143 dREQ;
433
434 Newz (0, req, 1, aio_cb);
435
436 if (!req)
437 croak ("out of memory during aio_req allocation");
438 1144
439 req->type = REQ_OPEN; 1145 req->type = REQ_OPEN;
440 req->data = newSVsv (pathname); 1146 req->data = newSVsv (pathname);
441 req->dataptr = SvPV_nolen (req->data); 1147 req->dataptr = SvPVbyte_nolen (req->data);
442 req->fd = flags; 1148 req->fd = flags;
443 req->mode = mode; 1149 req->mode = mode;
444 req->callback = SvREFCNT_inc (callback);
445 1150
446 send_req (req); 1151 REQ_SEND;
447} 1152}
448 1153
449void 1154void
450aio_close(fh,callback=&PL_sv_undef) 1155aio_close (fh,callback=&PL_sv_undef)
451 InputStream fh 1156 SV * fh
452 SV * callback 1157 SV * callback
453 PROTOTYPE: $;$ 1158 PROTOTYPE: $;$
454 ALIAS: 1159 ALIAS:
455 aio_close = REQ_CLOSE 1160 aio_close = REQ_CLOSE
456 aio_fsync = REQ_FSYNC 1161 aio_fsync = REQ_FSYNC
457 aio_fdatasync = REQ_FDATASYNC 1162 aio_fdatasync = REQ_FDATASYNC
458 CODE: 1163 PPCODE:
1164{
1165 dREQ;
1166
1167 req->type = ix;
1168 req->fh = newSVsv (fh);
1169 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1170
1171 REQ_SEND (req);
1172}
1173
1174void
1175aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1176 SV * fh
1177 UV offset
1178 UV length
1179 SV * data
1180 UV dataoffset
1181 SV * callback
1182 ALIAS:
1183 aio_read = REQ_READ
1184 aio_write = REQ_WRITE
1185 PROTOTYPE: $$$$$;$
1186 PPCODE:
459{ 1187{
460 aio_req req; 1188 aio_req req;
1189 STRLEN svlen;
1190 char *svptr = SvPVbyte (data, svlen);
461 1191
462 Newz (0, req, 1, aio_cb); 1192 SvUPGRADE (data, SVt_PV);
1193 SvPOK_on (data);
463 1194
464 if (!req) 1195 if (dataoffset < 0)
465 croak ("out of memory during aio_req allocation"); 1196 dataoffset += svlen;
466 1197
467 req->type = ix; 1198 if (dataoffset < 0 || dataoffset > svlen)
468 req->fd = PerlIO_fileno (fh); 1199 croak ("data offset outside of string");
469 req->callback = SvREFCNT_inc (callback);
470 1200
471 send_req (req); 1201 if (ix == REQ_WRITE)
472} 1202 {
473 1203 /* write: check length and adjust. */
474void 1204 if (length < 0 || length + dataoffset > svlen)
475aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1205 length = svlen - dataoffset;
476 InputStream fh 1206 }
477 UV offset 1207 else
478 IV length 1208 {
479 SV * data 1209 /* read: grow scalar as necessary */
480 IV dataoffset 1210 svptr = SvGROW (data, length + dataoffset);
481 SV * callback 1211 }
482 PROTOTYPE: $$$$$;$
483 CODE:
484 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
485
486void
487aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
488 OutputStream fh
489 UV offset
490 IV length
491 SV * data
492 IV dataoffset
493 SV * callback
494 PROTOTYPE: $$$$$;$
495 CODE:
496 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
497
498void
499aio_readahead(fh,offset,length,callback=&PL_sv_undef)
500 InputStream fh
501 UV offset
502 IV length
503 SV * callback
504 PROTOTYPE: $$$;$
505 CODE:
506{
507 aio_req req;
508 1212
509 if (length < 0) 1213 if (length < 0)
510 croak ("length must not be negative"); 1214 croak ("length must not be negative");
511 1215
512 Newz (0, req, 1, aio_cb); 1216 {
1217 dREQ;
513 1218
514 if (!req) 1219 req->type = ix;
515 croak ("out of memory during aio_req allocation"); 1220 req->fh = newSVsv (fh);
1221 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1222 : IoOFP (sv_2io (fh)));
1223 req->offset = offset;
1224 req->length = length;
1225 req->data = SvREFCNT_inc (data);
1226 req->dataptr = (char *)svptr + dataoffset;
1227
1228 if (!SvREADONLY (data))
1229 {
1230 SvREADONLY_on (data);
1231 req->data2ptr = (void *)data;
1232 }
1233
1234 REQ_SEND;
1235 }
1236}
1237
1238void
1239aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1240 SV * out_fh
1241 SV * in_fh
1242 UV in_offset
1243 UV length
1244 SV * callback
1245 PROTOTYPE: $$$$;$
1246 PPCODE:
1247{
1248 dREQ;
1249
1250 req->type = REQ_SENDFILE;
1251 req->fh = newSVsv (out_fh);
1252 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1253 req->fh2 = newSVsv (in_fh);
1254 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1255 req->offset = in_offset;
1256 req->length = length;
1257
1258 REQ_SEND;
1259}
1260
1261void
1262aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1263 SV * fh
1264 UV offset
1265 IV length
1266 SV * callback
1267 PROTOTYPE: $$$;$
1268 PPCODE:
1269{
1270 dREQ;
516 1271
517 req->type = REQ_READAHEAD; 1272 req->type = REQ_READAHEAD;
1273 req->fh = newSVsv (fh);
518 req->fd = PerlIO_fileno (fh); 1274 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
519 req->offset = offset; 1275 req->offset = offset;
520 req->length = length; 1276 req->length = length;
521 req->callback = SvREFCNT_inc (callback);
522 1277
523 send_req (req); 1278 REQ_SEND;
524} 1279}
525 1280
526void 1281void
527aio_stat(fh_or_path,callback=&PL_sv_undef) 1282aio_stat (fh_or_path,callback=&PL_sv_undef)
528 SV * fh_or_path 1283 SV * fh_or_path
529 SV * callback 1284 SV * callback
530 ALIAS: 1285 ALIAS:
531 aio_stat = REQ_STAT 1286 aio_stat = REQ_STAT
532 aio_lstat = REQ_LSTAT 1287 aio_lstat = REQ_LSTAT
533 CODE: 1288 PPCODE:
534{ 1289{
535 aio_req req; 1290 dREQ;
536
537 Newz (0, req, 1, aio_cb);
538
539 if (!req)
540 croak ("out of memory during aio_req allocation");
541 1291
542 New (0, req->statdata, 1, Stat_t); 1292 New (0, req->statdata, 1, Stat_t);
543
544 if (!req->statdata) 1293 if (!req->statdata)
1294 {
1295 req_free (req);
545 croak ("out of memory during aio_req->statdata allocation"); 1296 croak ("out of memory during aio_req->statdata allocation");
1297 }
546 1298
547 if (SvPOK (fh_or_path)) 1299 if (SvPOK (fh_or_path))
548 { 1300 {
549 req->type = ix; 1301 req->type = ix;
550 req->data = newSVsv (fh_or_path); 1302 req->data = newSVsv (fh_or_path);
551 req->dataptr = SvPV_nolen (req->data); 1303 req->dataptr = SvPVbyte_nolen (req->data);
552 } 1304 }
553 else 1305 else
554 { 1306 {
555 req->type = REQ_FSTAT; 1307 req->type = REQ_FSTAT;
1308 req->fh = newSVsv (fh_or_path);
556 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1309 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
557 } 1310 }
558 1311
559 req->callback = SvREFCNT_inc (callback); 1312 REQ_SEND;
560
561 send_req (req);
562} 1313}
563 1314
564void 1315void
565aio_unlink(pathname,callback=&PL_sv_undef) 1316aio_unlink (pathname,callback=&PL_sv_undef)
566 SV * pathname 1317 SV * pathname
567 SV * callback 1318 SV * callback
1319 ALIAS:
1320 aio_unlink = REQ_UNLINK
1321 aio_rmdir = REQ_RMDIR
1322 aio_readdir = REQ_READDIR
568 CODE: 1323 PPCODE:
569{ 1324{
570 aio_req req; 1325 dREQ;
571 1326
572 Newz (0, req, 1, aio_cb); 1327 req->type = ix;
1328 req->data = newSVsv (pathname);
1329 req->dataptr = SvPVbyte_nolen (req->data);
573 1330
574 if (!req) 1331 REQ_SEND;
575 croak ("out of memory during aio_req allocation"); 1332}
1333
1334void
1335aio_link (oldpath,newpath,callback=&PL_sv_undef)
1336 SV * oldpath
1337 SV * newpath
1338 SV * callback
1339 ALIAS:
1340 aio_link = REQ_LINK
1341 aio_symlink = REQ_SYMLINK
1342 aio_rename = REQ_RENAME
1343 PPCODE:
1344{
1345 dREQ;
576 1346
577 req->type = REQ_UNLINK; 1347 req->type = ix;
1348 req->fh = newSVsv (oldpath);
1349 req->data2ptr = SvPVbyte_nolen (req->fh);
578 req->data = newSVsv (pathname); 1350 req->data = newSVsv (newpath);
579 req->dataptr = SvPV_nolen (req->data); 1351 req->dataptr = SvPVbyte_nolen (req->data);
580 req->callback = SvREFCNT_inc (callback);
581 1352
582 send_req (req); 1353 REQ_SEND;
583} 1354}
584 1355
585void 1356void
1357aio_busy (delay,callback=&PL_sv_undef)
1358 double delay
1359 SV * callback
1360 PPCODE:
1361{
1362 dREQ;
1363
1364 req->type = REQ_BUSY;
1365 req->fd = delay < 0. ? 0 : delay;
1366 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1367
1368 REQ_SEND;
1369}
1370
1371void
1372aio_group (callback=&PL_sv_undef)
1373 SV * callback
1374 PROTOTYPE: ;$
1375 PPCODE:
1376{
1377 dREQ;
1378
1379 req->type = REQ_GROUP;
1380 req_send (req);
1381
1382 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1383}
1384
1385void
1386aio_nop (callback=&PL_sv_undef)
1387 SV * callback
1388 PPCODE:
1389{
1390 dREQ;
1391
1392 req->type = REQ_NOP;
1393
1394 REQ_SEND;
1395}
1396
1397void
1398aioreq_pri (int pri = DEFAULT_PRI)
1399 CODE:
1400 if (pri < PRI_MIN) pri = PRI_MIN;
1401 if (pri > PRI_MAX) pri = PRI_MAX;
1402 next_pri = pri + PRI_BIAS;
1403
1404void
1405aioreq_nice (int nice = 0)
1406 CODE:
1407 nice = next_pri - nice;
1408 if (nice < PRI_MIN) nice = PRI_MIN;
1409 if (nice > PRI_MAX) nice = PRI_MAX;
1410 next_pri = nice + PRI_BIAS;
1411
1412void
586flush() 1413flush ()
587 PROTOTYPE: 1414 PROTOTYPE:
588 CODE: 1415 CODE:
589 while (nreqs) 1416 while (nreqs)
590 { 1417 {
591 poll_wait (); 1418 poll_wait ();
592 poll_cb (); 1419 poll_cb (0);
593 } 1420 }
594 1421
595void 1422void
596poll() 1423poll()
597 PROTOTYPE: 1424 PROTOTYPE:
598 CODE: 1425 CODE:
599 if (nreqs) 1426 if (nreqs)
600 { 1427 {
601 poll_wait (); 1428 poll_wait ();
602 poll_cb (); 1429 poll_cb (0);
603 } 1430 }
604 1431
605int 1432int
606poll_fileno() 1433poll_fileno()
607 PROTOTYPE: 1434 PROTOTYPE:
… …
612 1439
613int 1440int
614poll_cb(...) 1441poll_cb(...)
615 PROTOTYPE: 1442 PROTOTYPE:
616 CODE: 1443 CODE:
617 RETVAL = poll_cb (); 1444 RETVAL = poll_cb (0);
1445 OUTPUT:
1446 RETVAL
1447
1448int
1449poll_some(int max = 0)
1450 PROTOTYPE: $
1451 CODE:
1452 RETVAL = poll_cb (max);
618 OUTPUT: 1453 OUTPUT:
619 RETVAL 1454 RETVAL
620 1455
621void 1456void
622poll_wait() 1457poll_wait()
… …
631 CODE: 1466 CODE:
632 RETVAL = nreqs; 1467 RETVAL = nreqs;
633 OUTPUT: 1468 OUTPUT:
634 RETVAL 1469 RETVAL
635 1470
1471PROTOTYPES: DISABLE
1472
1473MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1474
1475void
1476cancel (aio_req_ornot req)
1477 CODE:
1478 req_cancel (req);
1479
1480void
1481cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1482 CODE:
1483 SvREFCNT_dec (req->callback);
1484 req->callback = newSVsv (callback);
1485
1486MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1487
1488void
1489add (aio_req grp, ...)
1490 PPCODE:
1491{
1492 int i;
1493 aio_req req;
1494
1495 if (grp->fd == 2)
1496 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1497
1498 for (i = 1; i < items; ++i )
1499 {
1500 if (GIMME_V != G_VOID)
1501 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1502
1503 req = SvAIO_REQ (ST (i));
1504
1505 if (req)
1506 {
1507 ++grp->length;
1508 req->grp = grp;
1509
1510 req->grp_prev = 0;
1511 req->grp_next = grp->grp_first;
1512
1513 if (grp->grp_first)
1514 grp->grp_first->grp_prev = req;
1515
1516 grp->grp_first = req;
1517 }
1518 }
1519}
1520
1521void
1522cancel_subs (aio_req_ornot req)
1523 CODE:
1524 req_cancel_subs (req);
1525
1526void
1527result (aio_req grp, ...)
1528 CODE:
1529{
1530 int i;
1531 AV *av = newAV ();
1532
1533 for (i = 1; i < items; ++i )
1534 av_push (av, newSVsv (ST (i)));
1535
1536 SvREFCNT_dec (grp->data);
1537 grp->data = (SV *)av;
1538}
1539
1540void
1541limit (aio_req grp, int limit)
1542 CODE:
1543 grp->fd2 = limit;
1544 aio_grp_feed (grp);
1545
1546void
1547feed (aio_req grp, SV *callback=&PL_sv_undef)
1548 CODE:
1549{
1550 SvREFCNT_dec (grp->fh2);
1551 grp->fh2 = newSVsv (callback);
1552
1553 if (grp->fd2 <= 0)
1554 grp->fd2 = 2;
1555
1556 aio_grp_feed (grp);
1557}
1558

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