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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.6 by root, Mon Jul 11 01:03:17 2005 UTC vs.
Revision 1.98 by root, Wed May 9 06:45:12 2007 UTC

1#include "xthread.h"
2
3#include <errno.h>
4
1#include "EXTERN.h" 5#include "EXTERN.h"
2#include "perl.h" 6#include "perl.h"
3#include "XSUB.h" 7#include "XSUB.h"
4 8
9#include "autoconf/config.h"
10
11#include <stddef.h>
12#include <stdlib.h>
13#include <errno.h>
14#include <sys/time.h>
15#include <sys/select.h>
5#include <sys/types.h> 16#include <sys/types.h>
6#include <sys/stat.h> 17#include <sys/stat.h>
18#include <limits.h>
7#include <unistd.h> 19#include <unistd.h>
8#include <fcntl.h> 20#include <fcntl.h>
9#include <signal.h> 21#include <signal.h>
10#include <sched.h> 22#include <sched.h>
11#include <endian.h>
12 23
13#include <pthread.h> 24#if HAVE_SENDFILE
25# if __linux
26# include <sys/sendfile.h>
27# elif __freebsd
14#include <sys/syscall.h> 28# include <sys/socket.h>
15 29# include <sys/uio.h>
16typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 30# elif __hpux
17typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 31# include <sys/socket.h>
18typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 32# elif __solaris /* not yet */
19 33# include <sys/sendfile.h>
20#if __ia64
21# define STACKSIZE 65536
22#else 34# else
23# define STACKSIZE 4096 35# error sendfile support requested but not available
36# endif
24#endif 37#endif
38
39/* number of seconds after which idle threads exit */
40#define IDLE_TIMEOUT 10
41
42/* used for struct dirent, AIX doesn't provide it */
43#ifndef NAME_MAX
44# define NAME_MAX 4096
45#endif
46
47/* buffer size for various temporary buffers */
48#define AIO_BUFSIZE 65536
49
50#define dBUF \
51 char *aio_buf; \
52 LOCK (wrklock); \
53 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
54 UNLOCK (wrklock); \
55 if (!aio_buf) \
56 return -1;
57
58typedef SV SV8; /* byte-sv, used for argument-checking */
25 59
26enum { 60enum {
27 REQ_QUIT, 61 REQ_QUIT,
28 REQ_OPEN, REQ_CLOSE, 62 REQ_OPEN, REQ_CLOSE,
29 REQ_READ, REQ_WRITE, REQ_READAHEAD, 63 REQ_READ, REQ_WRITE, REQ_READAHEAD,
64 REQ_SENDFILE,
30 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 65 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
31 REQ_FSYNC, REQ_FDATASYNC, 66 REQ_FSYNC, REQ_FDATASYNC,
67 REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
68 REQ_MKNOD, REQ_READDIR,
69 REQ_LINK, REQ_SYMLINK, REQ_READLINK,
70 REQ_GROUP, REQ_NOP,
71 REQ_BUSY,
32}; 72};
33 73
74#define AIO_REQ_KLASS "IO::AIO::REQ"
75#define AIO_GRP_KLASS "IO::AIO::GRP"
76
34typedef struct aio_cb { 77typedef struct aio_cb
78{
35 struct aio_cb *volatile next; 79 struct aio_cb *volatile next;
36 80
81 SV *callback, *fh;
82 SV *sv1, *sv2;
83 void *ptr1, *ptr2;
84 off_t offs;
85 size_t size;
86 ssize_t result;
87
88 STRLEN stroffset;
37 int type; 89 int type;
38 90 int int1, int2;
39 int fd; 91 int errorno;
40 off_t offset;
41 size_t length;
42 ssize_t result;
43 mode_t mode; /* open */ 92 mode_t mode; /* open */
44 int errorno;
45 SV *data, *callback;
46 void *dataptr;
47 STRLEN dataoffset;
48 93
49 Stat_t *statdata; 94 unsigned char flags;
95 unsigned char pri;
96
97 SV *self; /* the perl counterpart of this request, if any */
98 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
50} aio_cb; 99} aio_cb;
51 100
101enum {
102 FLAG_CANCELLED = 0x01, /* request was cancelled */
103 FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
104 FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
105};
106
52typedef aio_cb *aio_req; 107typedef aio_cb *aio_req;
108typedef aio_cb *aio_req_ornot;
53 109
54static int started; 110enum {
111 PRI_MIN = -4,
112 PRI_MAX = 4,
113
114 DEFAULT_PRI = 0,
115 PRI_BIAS = -PRI_MIN,
116 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
117};
118
119#define AIO_TICKS ((1000000 + 1023) >> 10)
120
121static unsigned int max_poll_time = 0;
122static unsigned int max_poll_reqs = 0;
123
124/* calculcate time difference in ~1/AIO_TICKS of a second */
125static int tvdiff (struct timeval *tv1, struct timeval *tv2)
126{
127 return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
128 + ((tv2->tv_usec - tv1->tv_usec) >> 10);
129}
130
131static thread_t main_tid;
55static int nreqs; 132static int main_sig;
56static int max_outstanding = 1<<30; 133static int block_sig_level;
134
135void block_sig ()
136{
137 sigset_t ss;
138
139 if (block_sig_level++)
140 return;
141
142 if (!main_sig)
143 return;
144
145 sigemptyset (&ss);
146 sigaddset (&ss, main_sig);
147 pthread_sigmask (SIG_BLOCK, &ss, 0);
148}
149
150void unblock_sig ()
151{
152 sigset_t ss;
153
154 if (--block_sig_level)
155 return;
156
157 if (!main_sig)
158 return;
159
160 sigemptyset (&ss);
161 sigaddset (&ss, main_sig);
162 pthread_sigmask (SIG_UNBLOCK, &ss, 0);
163}
164
165static int next_pri = DEFAULT_PRI + PRI_BIAS;
166
167static unsigned int started, idle, wanted;
168
169/* worker threads management */
170static mutex_t wrklock = MUTEX_INIT;
171
172typedef struct worker {
173 /* locked by wrklock */
174 struct worker *prev, *next;
175
176 thread_t tid;
177
178 /* locked by reslock, reqlock or wrklock */
179 aio_req req; /* currently processed request */
180 void *dbuf;
181 DIR *dirp;
182} worker;
183
184static worker wrk_first = { &wrk_first, &wrk_first, 0 };
185
186static void worker_clear (worker *wrk)
187{
188 if (wrk->dirp)
189 {
190 closedir (wrk->dirp);
191 wrk->dirp = 0;
192 }
193
194 if (wrk->dbuf)
195 {
196 free (wrk->dbuf);
197 wrk->dbuf = 0;
198 }
199}
200
201static void worker_free (worker *wrk)
202{
203 wrk->next->prev = wrk->prev;
204 wrk->prev->next = wrk->next;
205
206 free (wrk);
207}
208
209static volatile unsigned int nreqs, nready, npending;
210static volatile unsigned int max_idle = 4;
211static volatile unsigned int max_outstanding = 0xffffffff;
57static int respipe [2]; 212static int respipe [2];
58 213
59static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 214static mutex_t reslock = MUTEX_INIT;
60static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 215static mutex_t reqlock = MUTEX_INIT;
61static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 216static cond_t reqwait = COND_INIT;
62 217
63static volatile aio_req reqs, reqe; /* queue start, queue end */ 218#if WORDACCESS_UNSAFE
64static volatile aio_req ress, rese; /* queue start, queue end */
65 219
66static void 220static unsigned int get_nready ()
67poll_wait ()
68{ 221{
69 if (!nreqs) 222 unsigned int retval;
223
224 LOCK (reqlock);
225 retval = nready;
226 UNLOCK (reqlock);
227
228 return retval;
229}
230
231static unsigned int get_npending ()
232{
233 unsigned int retval;
234
235 LOCK (reslock);
236 retval = npending;
237 UNLOCK (reslock);
238
239 return retval;
240}
241
242static unsigned int get_nthreads ()
243{
244 unsigned int retval;
245
246 LOCK (wrklock);
247 retval = started;
248 UNLOCK (wrklock);
249
250 return retval;
251}
252
253#else
254
255# define get_nready() nready
256# define get_npending() npending
257# define get_nthreads() started
258
259#endif
260
261/*
262 * a somewhat faster data structure might be nice, but
263 * with 8 priorities this actually needs <20 insns
264 * per shift, the most expensive operation.
265 */
266typedef struct {
267 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
268 int size;
269} reqq;
270
271static reqq req_queue;
272static reqq res_queue;
273
274int reqq_push (reqq *q, aio_req req)
275{
276 int pri = req->pri;
277 req->next = 0;
278
279 if (q->qe[pri])
280 {
281 q->qe[pri]->next = req;
282 q->qe[pri] = req;
283 }
284 else
285 q->qe[pri] = q->qs[pri] = req;
286
287 return q->size++;
288}
289
290aio_req reqq_shift (reqq *q)
291{
292 int pri;
293
294 if (!q->size)
70 return; 295 return 0;
71 296
72 fd_set rfd; 297 --q->size;
73 FD_ZERO(&rfd);
74 FD_SET(respipe [0], &rfd);
75 298
76 select (respipe [0] + 1, &rfd, 0, 0, 0); 299 for (pri = NUM_PRI; pri--; )
77} 300 {
301 aio_req req = q->qs[pri];
78 302
79static int 303 if (req)
80poll_cb () 304 {
305 if (!(q->qs[pri] = req->next))
306 q->qe[pri] = 0;
307
308 return req;
309 }
310 }
311
312 abort ();
313}
314
315static int poll_cb ();
316static int req_invoke (aio_req req);
317static void req_free (aio_req req);
318static void req_cancel (aio_req req);
319
320/* must be called at most once */
321static SV *req_sv (aio_req req, const char *klass)
322{
323 if (!req->self)
324 {
325 req->self = (SV *)newHV ();
326 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
327 }
328
329 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
330}
331
332static aio_req SvAIO_REQ (SV *sv)
333{
334 MAGIC *mg;
335
336 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
337 croak ("object of class " AIO_REQ_KLASS " expected");
338
339 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
340
341 return mg ? (aio_req)mg->mg_ptr : 0;
342}
343
344static void aio_grp_feed (aio_req grp)
345{
346 block_sig ();
347
348 while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
349 {
350 int old_len = grp->size;
351
352 if (grp->sv2 && SvOK (grp->sv2))
353 {
354 dSP;
355
356 ENTER;
357 SAVETMPS;
358 PUSHMARK (SP);
359 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
360 PUTBACK;
361 call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
362 SPAGAIN;
363 FREETMPS;
364 LEAVE;
365 }
366
367 /* stop if no progress has been made */
368 if (old_len == grp->size)
369 {
370 SvREFCNT_dec (grp->sv2);
371 grp->sv2 = 0;
372 break;
373 }
374 }
375
376 unblock_sig ();
377}
378
379static void aio_grp_dec (aio_req grp)
380{
381 --grp->size;
382
383 /* call feeder, if applicable */
384 aio_grp_feed (grp);
385
386 /* finish, if done */
387 if (!grp->size && grp->int1)
388 {
389 block_sig ();
390
391 if (!req_invoke (grp))
392 {
393 req_free (grp);
394 unblock_sig ();
395 croak (0);
396 }
397
398 req_free (grp);
399 unblock_sig ();
400 }
401}
402
403static int req_invoke (aio_req req)
81{ 404{
82 dSP; 405 dSP;
83 int count = 0;
84 aio_req req;
85
86 {
87 /* read and signals sent by the worker threads */
88 char buf [32];
89 while (read (respipe [0], buf, 32) > 0)
90 ;
91 }
92 406
93 for (;;) 407 if (req->flags & FLAG_SV1_RO_OFF)
408 SvREADONLY_off (req->sv1);
409
410 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
94 { 411 {
95 pthread_mutex_lock (&reslock); 412 ENTER;
413 SAVETMPS;
414 PUSHMARK (SP);
415 EXTEND (SP, 1);
96 416
97 req = ress; 417 switch (req->type)
98
99 if (ress)
100 { 418 {
101 ress = ress->next; 419 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 { 420 {
128 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 421 SV *rv = &PL_sv_undef;
129 PL_laststatval = req->result;
130 PL_statcache = *(req->statdata);
131 422
132 Safefree (req->statdata); 423 if (req->result >= 0)
424 {
425 int i;
426 char *buf = req->ptr2;
427 AV *av = newAV ();
428
429 av_extend (av, req->result - 1);
430
431 for (i = 0; i < req->result; ++i)
432 {
433 SV *sv = newSVpv (buf, 0);
434
435 av_store (av, i, sv);
436 buf += SvCUR (sv) + 1;
437 }
438
439 rv = sv_2mortal (newRV_noinc ((SV *)av));
440 }
441
442 PUSHs (rv);
133 } 443 }
444 break;
134 445
135 PUSHMARK (SP); 446 case REQ_OPEN:
136 XPUSHs (sv_2mortal (newSViv (req->result)));
137
138 if (req->type == REQ_OPEN)
139 { 447 {
140 /* convert fd to fh */ 448 /* convert fd to fh */
141 SV *fh; 449 SV *fh;
142 450
451 PUSHs (sv_2mortal (newSViv (req->result)));
143 PUTBACK; 452 PUTBACK;
144 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 453 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
145 SPAGAIN; 454 SPAGAIN;
146 455
147 fh = POPs; 456 fh = POPs;
148
149 PUSHMARK (SP); 457 PUSHMARK (SP);
150 XPUSHs (fh); 458 XPUSHs (fh);
151 } 459 }
460 break;
152 461
153 PUTBACK; 462 case REQ_GROUP:
154 call_sv (req->callback, G_VOID | G_EVAL); 463 req->int1 = 2; /* mark group as finished */
155 SPAGAIN; 464
465 if (req->sv1)
156 466 {
157 if (req->callback) 467 int i;
158 SvREFCNT_dec (req->callback); 468 AV *av = (AV *)req->sv1;
159 469
160 errno = errorno; 470 EXTEND (SP, AvFILL (av) + 1);
161 count++; 471 for (i = 0; i <= AvFILL (av); ++i)
472 PUSHs (*av_fetch (av, i, 0));
473 }
474 break;
475
476 case REQ_NOP:
477 case REQ_BUSY:
478 break;
479
480 case REQ_READLINK:
481 if (req->result > 0)
482 {
483 SvCUR_set (req->sv1, req->result);
484 *SvEND (req->sv1) = 0;
485 PUSHs (req->sv1);
486 }
487 break;
488
489 case REQ_STAT:
490 case REQ_LSTAT:
491 case REQ_FSTAT:
492 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
493 PL_laststatval = req->result;
494 PL_statcache = *(Stat_t *)(req->ptr2);
495 PUSHs (sv_2mortal (newSViv (req->result)));
496 break;
497
498 case REQ_READ:
499 SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
500 *SvEND (req->sv1) = 0;
501 PUSHs (sv_2mortal (newSViv (req->result)));
502 break;
503
504 default:
505 PUSHs (sv_2mortal (newSViv (req->result)));
506 break;
162 } 507 }
163 508
164 Safefree (req); 509 errno = req->errorno;
510
511 PUTBACK;
512 call_sv (req->callback, G_VOID | G_EVAL);
513 SPAGAIN;
514
515 FREETMPS;
516 LEAVE;
165 } 517 }
166 518
167 return count; 519 if (req->grp)
520 {
521 aio_req grp = req->grp;
522
523 /* unlink request */
524 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
525 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
526
527 if (grp->grp_first == req)
528 grp->grp_first = req->grp_next;
529
530 aio_grp_dec (grp);
531 }
532
533 return !SvTRUE (ERRSV);
534}
535
536static void req_free (aio_req req)
537{
538 if (req->self)
539 {
540 sv_unmagic (req->self, PERL_MAGIC_ext);
541 SvREFCNT_dec (req->self);
542 }
543
544 SvREFCNT_dec (req->fh);
545 SvREFCNT_dec (req->sv1);
546 SvREFCNT_dec (req->sv2);
547 SvREFCNT_dec (req->callback);
548
549 if (req->flags & FLAG_PTR2_FREE)
550 free (req->ptr2);
551
552 Safefree (req);
553}
554
555static void req_cancel_subs (aio_req grp)
556{
557 aio_req sub;
558
559 if (grp->type != REQ_GROUP)
560 return;
561
562 SvREFCNT_dec (grp->sv2);
563 grp->sv2 = 0;
564
565 for (sub = grp->grp_first; sub; sub = sub->grp_next)
566 req_cancel (sub);
567}
568
569static void req_cancel (aio_req req)
570{
571 req->flags |= FLAG_CANCELLED;
572
573 req_cancel_subs (req);
168} 574}
169 575
170static void *aio_proc(void *arg); 576static void *aio_proc(void *arg);
171 577
172static void
173start_thread (void) 578static void start_thread (void)
174{ 579{
175 sigset_t fullsigset, oldsigset; 580 worker *wrk = calloc (1, sizeof (worker));
176 pthread_t tid;
177 pthread_attr_t attr;
178 581
179 pthread_attr_init (&attr); 582 if (!wrk)
180 pthread_attr_setstacksize (&attr, STACKSIZE); 583 croak ("unable to allocate worker thread data");
181 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
182 584
183 sigfillset (&fullsigset); 585 LOCK (wrklock);
184 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
185 586
186 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 587 if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
187 started++;
188
189 sigprocmask (SIG_SETMASK, &oldsigset, 0);
190}
191
192static void
193send_req (aio_req req)
194{
195 nreqs++;
196
197 pthread_mutex_lock (&reqlock);
198
199 req->next = 0;
200
201 if (reqe)
202 { 588 {
203 reqe->next = req; 589 wrk->prev = &wrk_first;
204 reqe = req; 590 wrk->next = wrk_first.next;
591 wrk_first.next->prev = wrk;
592 wrk_first.next = wrk;
593 ++started;
205 } 594 }
206 else 595 else
207 reqe = reqs = req; 596 free (wrk);
208 597
209 pthread_cond_signal (&reqwait); 598 UNLOCK (wrklock);
210 pthread_mutex_unlock (&reqlock); 599}
211 600
212 while (nreqs > max_outstanding) 601static void maybe_start_thread ()
602{
603 if (get_nthreads () >= wanted)
604 return;
605
606 /* todo: maybe use idle here, but might be less exact */
607 if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
608 return;
609
610 start_thread ();
611}
612
613static void req_send (aio_req req)
614{
615 block_sig ();
616
617 ++nreqs;
618
619 LOCK (reqlock);
620 ++nready;
621 reqq_push (&req_queue, req);
622 COND_SIGNAL (reqwait);
623 UNLOCK (reqlock);
624
625 unblock_sig ();
626
627 maybe_start_thread ();
628}
629
630static void end_thread (void)
631{
632 aio_req req;
633
634 Newz (0, req, 1, aio_cb);
635
636 req->type = REQ_QUIT;
637 req->pri = PRI_MAX + PRI_BIAS;
638
639 LOCK (reqlock);
640 reqq_push (&req_queue, req);
641 COND_SIGNAL (reqwait);
642 UNLOCK (reqlock);
643
644 LOCK (wrklock);
645 --started;
646 UNLOCK (wrklock);
647}
648
649static void set_max_idle (int nthreads)
650{
651 if (WORDACCESS_UNSAFE) LOCK (reqlock);
652 max_idle = nthreads <= 0 ? 1 : nthreads;
653 if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
654}
655
656static void min_parallel (int nthreads)
657{
658 if (wanted < nthreads)
659 wanted = nthreads;
660}
661
662static void max_parallel (int nthreads)
663{
664 if (wanted > nthreads)
665 wanted = nthreads;
666
667 while (started > wanted)
668 end_thread ();
669}
670
671static void poll_wait ()
672{
673 fd_set rfd;
674
675 while (nreqs)
213 { 676 {
677 int size;
678 if (WORDACCESS_UNSAFE) LOCK (reslock);
679 size = res_queue.size;
680 if (WORDACCESS_UNSAFE) UNLOCK (reslock);
681
682 if (size)
683 return;
684
685 maybe_start_thread ();
686
687 FD_ZERO(&rfd);
688 FD_SET(respipe [0], &rfd);
689
690 select (respipe [0] + 1, &rfd, 0, 0, 0);
691 }
692}
693
694static int poll_cb ()
695{
696 dSP;
697 int count = 0;
698 int maxreqs = max_poll_reqs;
699 int do_croak = 0;
700 struct timeval tv_start, tv_now;
701 aio_req req;
702
703 if (max_poll_time)
704 gettimeofday (&tv_start, 0);
705
706 block_sig ();
707
708 for (;;)
709 {
710 for (;;)
711 {
712 maybe_start_thread ();
713
714 LOCK (reslock);
715 req = reqq_shift (&res_queue);
716
717 if (req)
718 {
719 --npending;
720
721 if (!res_queue.size)
722 {
723 /* read any signals sent by the worker threads */
724 char buf [4];
725 while (read (respipe [0], buf, 4) == 4)
726 ;
727 }
728 }
729
730 UNLOCK (reslock);
731
732 if (!req)
733 break;
734
735 --nreqs;
736
737 if (req->type == REQ_GROUP && req->size)
738 {
739 req->int1 = 1; /* mark request as delayed */
740 continue;
741 }
742 else
743 {
744 if (!req_invoke (req))
745 {
746 req_free (req);
747 unblock_sig ();
748 croak (0);
749 }
750
751 count++;
752 }
753
754 req_free (req);
755
756 if (maxreqs && !--maxreqs)
757 break;
758
759 if (max_poll_time)
760 {
761 gettimeofday (&tv_now, 0);
762
763 if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
764 break;
765 }
766 }
767
768 if (nreqs <= max_outstanding)
769 break;
770
214 poll_wait (); 771 poll_wait ();
215 poll_cb (); 772
773 ++maxreqs;
216 } 774 }
217}
218 775
219static void 776 unblock_sig ();
220end_thread (void) 777 return count;
221{
222 aio_req req;
223 New (0, req, 1, aio_cb);
224 req->type = REQ_QUIT;
225
226 send_req (req);
227} 778}
228 779
229static void 780static void create_pipe ()
230read_write (int dowrite, int fd, off_t offset, size_t length,
231 SV *data, STRLEN dataoffset, SV *callback)
232{ 781{
233 aio_req req; 782 if (pipe (respipe))
234 STRLEN svlen; 783 croak ("unable to initialize result pipe");
235 char *svptr = SvPV (data, svlen);
236 784
237 SvUPGRADE (data, SVt_PV); 785 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
238 SvPOK_on (data); 786 croak ("cannot set result pipe to nonblocking mode");
239 787
240 if (dataoffset < 0) 788 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
241 dataoffset += svlen; 789 croak ("cannot set result pipe to nonblocking mode");
790}
242 791
243 if (dataoffset < 0 || dataoffset > svlen) 792/*****************************************************************************/
244 croak ("data offset outside of string"); 793/* work around various missing functions */
245 794
246 if (dowrite) 795#if !HAVE_PREADWRITE
796# define pread aio_pread
797# define pwrite aio_pwrite
798
799/*
800 * make our pread/pwrite safe against themselves, but not against
801 * normal read/write by using a mutex. slows down execution a lot,
802 * but that's your problem, not mine.
803 */
804static mutex_t preadwritelock = MUTEX_INIT;
805
806static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
807{
808 ssize_t res;
809 off_t ooffset;
810
811 LOCK (preadwritelock);
812 ooffset = lseek (fd, 0, SEEK_CUR);
813 lseek (fd, offset, SEEK_SET);
814 res = read (fd, buf, count);
815 lseek (fd, ooffset, SEEK_SET);
816 UNLOCK (preadwritelock);
817
818 return res;
819}
820
821static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
822{
823 ssize_t res;
824 off_t ooffset;
825
826 LOCK (preadwritelock);
827 ooffset = lseek (fd, 0, SEEK_CUR);
828 lseek (fd, offset, SEEK_SET);
829 res = write (fd, buf, count);
830 lseek (fd, offset, SEEK_SET);
831 UNLOCK (preadwritelock);
832
833 return res;
834}
835#endif
836
837#if !HAVE_FDATASYNC
838# define fdatasync fsync
839#endif
840
841#if !HAVE_READAHEAD
842# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
843
844static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
845{
846 dBUF;
847
848 while (count > 0)
247 { 849 {
248 /* write: check length and adjust. */ 850 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
249 if (length < 0 || length + dataoffset > svlen) 851
250 length = svlen - dataoffset; 852 pread (fd, aio_buf, len, offset);
853 offset += len;
854 count -= len;
855 }
856
857 errno = 0;
858}
859
860#endif
861
862#if !HAVE_READDIR_R
863# define readdir_r aio_readdir_r
864
865static mutex_t readdirlock = MUTEX_INIT;
866
867static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
868{
869 struct dirent *e;
870 int errorno;
871
872 LOCK (readdirlock);
873
874 e = readdir (dirp);
875 errorno = errno;
876
877 if (e)
878 {
879 *res = ent;
880 strcpy (ent->d_name, e->d_name);
251 } 881 }
252 else 882 else
883 *res = 0;
884
885 UNLOCK (readdirlock);
886
887 errno = errorno;
888 return e ? 0 : -1;
889}
890#endif
891
892/* sendfile always needs emulation */
893static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
894{
895 ssize_t res;
896
897 if (!count)
898 return 0;
899
900#if HAVE_SENDFILE
901# if __linux
902 res = sendfile (ofd, ifd, &offset, count);
903
904# elif __freebsd
905 /*
906 * Of course, the freebsd sendfile is a dire hack with no thoughts
907 * wasted on making it similar to other I/O functions.
908 */
909 {
910 off_t sbytes;
911 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
912
913 if (res < 0 && sbytes)
914 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
915 res = sbytes;
916 }
917
918# elif __hpux
919 res = sendfile (ofd, ifd, offset, count, 0, 0);
920
921# elif __solaris
922 {
923 struct sendfilevec vec;
924 size_t sbytes;
925
926 vec.sfv_fd = ifd;
927 vec.sfv_flag = 0;
928 vec.sfv_off = offset;
929 vec.sfv_len = count;
930
931 res = sendfilev (ofd, &vec, 1, &sbytes);
932
933 if (res < 0 && sbytes)
934 res = sbytes;
935 }
936
937# endif
938#else
939 res = -1;
940 errno = ENOSYS;
941#endif
942
943 if (res < 0
944 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
945#if __solaris
946 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
947#endif
948 )
949 )
253 { 950 {
254 /* read: grow scalar as necessary */ 951 /* emulate sendfile. this is a major pain in the ass */
255 svptr = SvGROW (data, length + dataoffset); 952 dBUF;
953
954 res = 0;
955
956 while (count)
957 {
958 ssize_t cnt;
959
960 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
961
962 if (cnt <= 0)
963 {
964 if (cnt && !res) res = -1;
965 break;
966 }
967
968 cnt = write (ofd, aio_buf, cnt);
969
970 if (cnt <= 0)
971 {
972 if (cnt && !res) res = -1;
973 break;
974 }
975
976 offset += cnt;
977 res += cnt;
978 count -= cnt;
979 }
256 } 980 }
257 981
258 if (length < 0) 982 return res;
259 croak ("length must not be negative");
260
261 Newz (0, req, 1, aio_cb);
262
263 if (!req)
264 croak ("out of memory during aio_req allocation");
265
266 req->type = dowrite ? REQ_WRITE : REQ_READ;
267 req->fd = fd;
268 req->offset = offset;
269 req->length = length;
270 req->data = SvREFCNT_inc (data);
271 req->dataptr = (char *)svptr + dataoffset;
272 req->callback = SvREFCNT_inc (callback);
273
274 send_req (req);
275} 983}
276 984
277static void * 985/* read a full directory */
986static void scandir_ (aio_req req, worker *self)
987{
988 DIR *dirp;
989 union
990 {
991 struct dirent d;
992 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
993 } *u;
994 struct dirent *entp;
995 char *name, *names;
996 int memlen = 4096;
997 int memofs = 0;
998 int res = 0;
999 int errorno;
1000
1001 LOCK (wrklock);
1002 self->dirp = dirp = opendir (req->ptr1);
1003 self->dbuf = u = malloc (sizeof (*u));
1004 req->flags |= FLAG_PTR2_FREE;
1005 req->ptr2 = names = malloc (memlen);
1006 UNLOCK (wrklock);
1007
1008 if (dirp && u && names)
1009 for (;;)
1010 {
1011 errno = 0;
1012 readdir_r (dirp, &u->d, &entp);
1013
1014 if (!entp)
1015 break;
1016
1017 name = entp->d_name;
1018
1019 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1020 {
1021 int len = strlen (name) + 1;
1022
1023 res++;
1024
1025 while (memofs + len > memlen)
1026 {
1027 memlen *= 2;
1028 LOCK (wrklock);
1029 req->ptr2 = names = realloc (names, memlen);
1030 UNLOCK (wrklock);
1031
1032 if (!names)
1033 break;
1034 }
1035
1036 memcpy (names + memofs, name, len);
1037 memofs += len;
1038 }
1039 }
1040
1041 if (errno)
1042 res = -1;
1043
1044 req->result = res;
1045}
1046
1047/*****************************************************************************/
1048
278aio_proc (void *thr_arg) 1049static void *aio_proc (void *thr_arg)
279{ 1050{
280 aio_req req; 1051 aio_req req;
281 int type; 1052 struct timespec ts;
1053 worker *self = (worker *)thr_arg;
282 1054
283 do 1055 /* try to distribute timeouts somewhat evenly */
1056 ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1057 * (1000000000UL / 1024UL);
1058
1059 for (;;)
284 { 1060 {
285 pthread_mutex_lock (&reqlock); 1061 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1062
1063 LOCK (reqlock);
286 1064
287 for (;;) 1065 for (;;)
288 { 1066 {
289 req = reqs; 1067 self->req = req = reqq_shift (&req_queue);
290
291 if (reqs)
292 {
293 reqs = reqs->next;
294 if (!reqs) reqe = 0;
295 }
296 1068
297 if (req) 1069 if (req)
298 break; 1070 break;
299 1071
300 pthread_cond_wait (&reqwait, &reqlock); 1072 ++idle;
1073
1074 if (COND_TIMEDWAIT (reqwait, reqlock, ts)
1075 == ETIMEDOUT)
1076 {
1077 if (idle > max_idle)
1078 {
1079 --idle;
1080 UNLOCK (reqlock);
1081 LOCK (wrklock);
1082 --started;
1083 UNLOCK (wrklock);
1084 goto quit;
1085 }
1086
1087 /* we are allowed to idle, so do so without any timeout */
1088 COND_WAIT (reqwait, reqlock);
1089 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1090 }
1091
1092 --idle;
301 } 1093 }
302 1094
303 pthread_mutex_unlock (&reqlock); 1095 --nready;
1096
1097 UNLOCK (reqlock);
304 1098
305 errno = 0; /* strictly unnecessary */ 1099 errno = 0; /* strictly unnecessary */
306 1100
307 type = req->type; 1101 if (!(req->flags & FLAG_CANCELLED))
308
309 switch (type) 1102 switch (req->type)
1103 {
1104 case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1105 case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1106
1107 case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1108 case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1109
1110 case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1111 case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1112 case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1113
1114 case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1115 case REQ_CLOSE: req->result = close (req->int1); break;
1116 case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1117 case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1118 case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
1119 case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1120 case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1121 case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1122 case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1123 case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1124
1125 case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1126 case REQ_FSYNC: req->result = fsync (req->int1); break;
1127 case REQ_READDIR: scandir_ (req, self); break;
1128
1129 case REQ_BUSY:
1130 {
1131 struct timeval tv;
1132
1133 tv.tv_sec = req->int1;
1134 tv.tv_usec = req->int2;
1135
1136 req->result = select (0, 0, 0, 0, &tv);
1137 }
1138
1139 case REQ_GROUP:
1140 case REQ_NOP:
1141 break;
1142
1143 case REQ_QUIT:
1144 goto quit;
1145
1146 default:
1147 req->result = ENOSYS;
1148 break;
1149 }
1150
1151 req->errorno = errno;
1152
1153 LOCK (reslock);
1154
1155 ++npending;
1156
1157 if (!reqq_push (&res_queue, req))
310 { 1158 {
311 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
312 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
313#if SYS_readahead
314 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
315#else
316 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
317#endif
318
319 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
320 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
321 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
322
323 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
324 case REQ_CLOSE: req->result = close (req->fd); break;
325 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
326
327 case REQ_FSYNC: req->result = fsync (req->fd); break;
328 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
329
330 case REQ_QUIT:
331 break;
332
333 default:
334 req->result = ENOSYS;
335 break;
336 }
337
338 req->errorno = errno;
339
340 pthread_mutex_lock (&reslock);
341
342 req->next = 0;
343
344 if (rese)
345 {
346 rese->next = req;
347 rese = req;
348 }
349 else
350 {
351 rese = ress = req;
352
353 /* write a dummy byte to the pipe so fh becomes ready */ 1159 /* write a dummy byte to the pipe so fh becomes ready */
354 write (respipe [1], &respipe, 1); 1160 write (respipe [1], &respipe, 1);
1161
1162 /* optionally signal the main thread asynchronously */
1163 if (main_sig)
1164 pthread_kill (main_tid, main_sig);
355 } 1165 }
356 1166
357 pthread_mutex_unlock (&reslock); 1167 self->req = 0;
1168 worker_clear (self);
1169
1170 UNLOCK (reslock);
358 } 1171 }
359 while (type != REQ_QUIT); 1172
1173quit:
1174 LOCK (wrklock);
1175 worker_free (self);
1176 UNLOCK (wrklock);
360 1177
361 return 0; 1178 return 0;
362} 1179}
363 1180
1181/*****************************************************************************/
1182
1183static void atfork_prepare (void)
1184{
1185 LOCK (wrklock);
1186 LOCK (reqlock);
1187 LOCK (reslock);
1188#if !HAVE_PREADWRITE
1189 LOCK (preadwritelock);
1190#endif
1191#if !HAVE_READDIR_R
1192 LOCK (readdirlock);
1193#endif
1194}
1195
1196static void atfork_parent (void)
1197{
1198#if !HAVE_READDIR_R
1199 UNLOCK (readdirlock);
1200#endif
1201#if !HAVE_PREADWRITE
1202 UNLOCK (preadwritelock);
1203#endif
1204 UNLOCK (reslock);
1205 UNLOCK (reqlock);
1206 UNLOCK (wrklock);
1207}
1208
1209static void atfork_child (void)
1210{
1211 aio_req prv;
1212
1213 while (prv = reqq_shift (&req_queue))
1214 req_free (prv);
1215
1216 while (prv = reqq_shift (&res_queue))
1217 req_free (prv);
1218
1219 while (wrk_first.next != &wrk_first)
1220 {
1221 worker *wrk = wrk_first.next;
1222
1223 if (wrk->req)
1224 req_free (wrk->req);
1225
1226 worker_clear (wrk);
1227 worker_free (wrk);
1228 }
1229
1230 started = 0;
1231 idle = 0;
1232 nreqs = 0;
1233 nready = 0;
1234 npending = 0;
1235
1236 close (respipe [0]);
1237 close (respipe [1]);
1238 create_pipe ();
1239
1240 atfork_parent ();
1241}
1242
1243#define dREQ \
1244 aio_req req; \
1245 int req_pri = next_pri; \
1246 next_pri = DEFAULT_PRI + PRI_BIAS; \
1247 \
1248 if (SvOK (callback) && !SvROK (callback)) \
1249 croak ("callback must be undef or of reference type"); \
1250 \
1251 Newz (0, req, 1, aio_cb); \
1252 if (!req) \
1253 croak ("out of memory during aio_req allocation"); \
1254 \
1255 req->callback = newSVsv (callback); \
1256 req->pri = req_pri
1257
1258#define REQ_SEND \
1259 req_send (req); \
1260 \
1261 if (GIMME_V != G_VOID) \
1262 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1263
364MODULE = IO::AIO PACKAGE = IO::AIO 1264MODULE = IO::AIO PACKAGE = IO::AIO
365 1265
1266PROTOTYPES: ENABLE
1267
366BOOT: 1268BOOT:
367{ 1269{
368 if (pipe (respipe)) 1270 HV *stash = gv_stashpv ("IO::AIO", 1);
369 croak ("unable to initialize result pipe");
370 1271
371 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1272 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
372 croak ("cannot set result pipe to nonblocking mode"); 1273 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1274 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1275 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1276 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1277 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1278 newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
373 1279
374 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 1280 create_pipe ();
375 croak ("cannot set result pipe to nonblocking mode"); 1281 ATFORK (atfork_prepare, atfork_parent, atfork_child);
376} 1282}
377 1283
378void 1284void
379min_parallel(nthreads) 1285max_poll_reqs (int nreqs)
380 int nthreads
381 PROTOTYPE: $ 1286 PROTOTYPE: $
382 CODE: 1287 CODE:
383 while (nthreads > started) 1288 max_poll_reqs = nreqs;
384 start_thread ();
385 1289
386void 1290void
387max_parallel(nthreads) 1291max_poll_time (double nseconds)
388 int nthreads
389 PROTOTYPE: $ 1292 PROTOTYPE: $
390 CODE: 1293 CODE:
391{ 1294 max_poll_time = nseconds * AIO_TICKS;
392 int cur = started;
393 while (cur > nthreads)
394 {
395 end_thread ();
396 cur--;
397 }
398 1295
399 while (started > nthreads) 1296void
400 { 1297min_parallel (int nthreads)
401 poll_wait (); 1298 PROTOTYPE: $
402 poll_cb (); 1299
403 } 1300void
404} 1301max_parallel (int nthreads)
1302 PROTOTYPE: $
1303
1304void
1305max_idle (int nthreads)
1306 PROTOTYPE: $
1307 CODE:
1308 set_max_idle (nthreads);
405 1309
406int 1310int
407max_outstanding(nreqs) 1311max_outstanding (int maxreqs)
408 int nreqs 1312 PROTOTYPE: $
409 PROTOTYPE: $
410 CODE: 1313 CODE:
411 RETVAL = max_outstanding; 1314 RETVAL = max_outstanding;
412 max_outstanding = nreqs; 1315 max_outstanding = maxreqs;
1316 OUTPUT:
1317 RETVAL
413 1318
414void 1319void
415aio_open(pathname,flags,mode,callback) 1320aio_open (pathname,flags,mode,callback=&PL_sv_undef)
416 SV * pathname 1321 SV8 * pathname
417 int flags 1322 int flags
418 int mode 1323 int mode
419 SV * callback 1324 SV * callback
420 PROTOTYPE: $$$$ 1325 PROTOTYPE: $$$;$
421 CODE: 1326 PPCODE:
422{ 1327{
423 aio_req req; 1328 dREQ;
424
425 Newz (0, req, 1, aio_cb);
426
427 if (!req)
428 croak ("out of memory during aio_req allocation");
429 1329
430 req->type = REQ_OPEN; 1330 req->type = REQ_OPEN;
431 req->data = newSVsv (pathname); 1331 req->sv1 = newSVsv (pathname);
432 req->dataptr = SvPV_nolen (req->data); 1332 req->ptr1 = SvPVbyte_nolen (req->sv1);
433 req->fd = flags; 1333 req->int1 = flags;
434 req->mode = mode; 1334 req->mode = mode;
435 req->callback = SvREFCNT_inc (callback);
436 1335
437 send_req (req); 1336 REQ_SEND;
438} 1337}
439 1338
440void 1339void
441aio_close(fh,callback) 1340aio_close (fh,callback=&PL_sv_undef)
442 InputStream fh 1341 SV * fh
443 SV * callback 1342 SV * callback
444 PROTOTYPE: $$ 1343 PROTOTYPE: $;$
445 ALIAS: 1344 ALIAS:
446 aio_close = REQ_CLOSE 1345 aio_close = REQ_CLOSE
447 aio_fsync = REQ_FSYNC 1346 aio_fsync = REQ_FSYNC
448 aio_fdatasync = REQ_FDATASYNC 1347 aio_fdatasync = REQ_FDATASYNC
449 CODE: 1348 PPCODE:
450{ 1349{
451 aio_req req; 1350 dREQ;
452
453 Newz (0, req, 1, aio_cb);
454
455 if (!req)
456 croak ("out of memory during aio_req allocation");
457 1351
458 req->type = ix; 1352 req->type = ix;
1353 req->fh = newSVsv (fh);
459 req->fd = PerlIO_fileno (fh); 1354 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
460 req->callback = SvREFCNT_inc (callback);
461 1355
462 send_req (req); 1356 REQ_SEND (req);
463} 1357}
464 1358
465void 1359void
466aio_read(fh,offset,length,data,dataoffset,callback) 1360aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
467 InputStream fh 1361 SV * fh
468 UV offset 1362 UV offset
469 IV length 1363 UV length
470 SV * data 1364 SV8 * data
471 IV dataoffset 1365 UV dataoffset
472 SV * callback 1366 SV * callback
1367 ALIAS:
1368 aio_read = REQ_READ
1369 aio_write = REQ_WRITE
473 PROTOTYPE: $$$$$$ 1370 PROTOTYPE: $$$$$;$
474 CODE: 1371 PPCODE:
475 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
476
477void
478aio_write(fh,offset,length,data,dataoffset,callback)
479 OutputStream fh
480 UV offset
481 IV length
482 SV * data
483 IV dataoffset
484 SV * callback
485 PROTOTYPE: $$$$$$
486 CODE:
487 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
488
489void
490aio_readahead(fh,offset,length,callback)
491 InputStream fh
492 UV offset
493 IV length
494 SV * callback
495 PROTOTYPE: $$$$
496 CODE:
497{ 1372{
498 aio_req req; 1373 STRLEN svlen;
1374 char *svptr = SvPVbyte (data, svlen);
1375
1376 SvUPGRADE (data, SVt_PV);
1377 SvPOK_on (data);
1378
1379 if (dataoffset < 0)
1380 dataoffset += svlen;
1381
1382 if (dataoffset < 0 || dataoffset > svlen)
1383 croak ("data offset outside of string");
1384
1385 if (ix == REQ_WRITE)
1386 {
1387 /* write: check length and adjust. */
1388 if (length < 0 || length + dataoffset > svlen)
1389 length = svlen - dataoffset;
1390 }
1391 else
1392 {
1393 /* read: grow scalar as necessary */
1394 svptr = SvGROW (data, length + dataoffset + 1);
1395 }
499 1396
500 if (length < 0) 1397 if (length < 0)
501 croak ("length must not be negative"); 1398 croak ("length must not be negative");
502 1399
503 Newz (0, req, 1, aio_cb); 1400 {
1401 dREQ;
504 1402
505 if (!req) 1403 req->type = ix;
506 croak ("out of memory during aio_req allocation"); 1404 req->fh = newSVsv (fh);
1405 req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1406 : IoOFP (sv_2io (fh)));
1407 req->offs = offset;
1408 req->size = length;
1409 req->sv1 = SvREFCNT_inc (data);
1410 req->ptr1 = (char *)svptr + dataoffset;
1411 req->stroffset = dataoffset;
1412
1413 if (!SvREADONLY (data))
1414 {
1415 SvREADONLY_on (data);
1416 req->flags |= FLAG_SV1_RO_OFF;
1417 }
1418
1419 REQ_SEND;
1420 }
1421}
1422
1423void
1424aio_readlink (path,callback=&PL_sv_undef)
1425 SV8 * path
1426 SV * callback
1427 PROTOTYPE: $$;$
1428 PPCODE:
1429{
1430 SV *data;
1431 dREQ;
1432
1433 data = newSV (NAME_MAX);
1434 SvPOK_on (data);
1435
1436 req->type = REQ_READLINK;
1437 req->fh = newSVsv (path);
1438 req->ptr2 = SvPVbyte_nolen (req->fh);
1439 req->sv1 = data;
1440 req->ptr1 = SvPVbyte_nolen (data);
1441
1442 REQ_SEND;
1443}
1444
1445void
1446aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1447 SV * out_fh
1448 SV * in_fh
1449 UV in_offset
1450 UV length
1451 SV * callback
1452 PROTOTYPE: $$$$;$
1453 PPCODE:
1454{
1455 dREQ;
1456
1457 req->type = REQ_SENDFILE;
1458 req->fh = newSVsv (out_fh);
1459 req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1460 req->sv2 = newSVsv (in_fh);
1461 req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1462 req->offs = in_offset;
1463 req->size = length;
1464
1465 REQ_SEND;
1466}
1467
1468void
1469aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1470 SV * fh
1471 UV offset
1472 IV length
1473 SV * callback
1474 PROTOTYPE: $$$;$
1475 PPCODE:
1476{
1477 dREQ;
507 1478
508 req->type = REQ_READAHEAD; 1479 req->type = REQ_READAHEAD;
1480 req->fh = newSVsv (fh);
509 req->fd = PerlIO_fileno (fh); 1481 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
510 req->offset = offset; 1482 req->offs = offset;
511 req->length = length; 1483 req->size = length;
512 req->callback = SvREFCNT_inc (callback);
513 1484
514 send_req (req); 1485 REQ_SEND;
515} 1486}
516 1487
517void 1488void
518aio_stat(fh_or_path,callback) 1489aio_stat (fh_or_path,callback=&PL_sv_undef)
519 SV * fh_or_path 1490 SV8 * fh_or_path
520 SV * callback 1491 SV * callback
521 PROTOTYPE: $$
522 ALIAS: 1492 ALIAS:
1493 aio_stat = REQ_STAT
523 aio_lstat = 1 1494 aio_lstat = REQ_LSTAT
524 CODE: 1495 PPCODE:
525{ 1496{
526 aio_req req; 1497 dREQ;
527 1498
528 Newz (0, req, 1, aio_cb); 1499 req->ptr2 = malloc (sizeof (Stat_t));
529
530 if (!req) 1500 if (!req->ptr2)
531 croak ("out of memory during aio_req allocation"); 1501 {
532 1502 req_free (req);
533 New (0, req->statdata, 1, Stat_t);
534
535 if (!req->statdata)
536 croak ("out of memory during aio_req->statdata allocation"); 1503 croak ("out of memory during aio_stat statdata allocation");
1504 }
1505
1506 req->flags |= FLAG_PTR2_FREE;
537 1507
538 if (SvPOK (fh_or_path)) 1508 if (SvPOK (fh_or_path))
539 { 1509 {
540 req->type = ix ? REQ_LSTAT : REQ_STAT; 1510 req->type = ix;
541 req->data = newSVsv (fh_or_path); 1511 req->sv1 = newSVsv (fh_or_path);
542 req->dataptr = SvPV_nolen (req->data); 1512 req->ptr1 = SvPVbyte_nolen (req->sv1);
543 } 1513 }
544 else 1514 else
545 { 1515 {
546 req->type = REQ_FSTAT; 1516 req->type = REQ_FSTAT;
1517 req->fh = newSVsv (fh_or_path);
547 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1518 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548 } 1519 }
549 1520
550 req->callback = SvREFCNT_inc (callback); 1521 REQ_SEND;
551
552 send_req (req);
553} 1522}
554 1523
555void 1524void
556aio_unlink(pathname,callback) 1525aio_unlink (pathname,callback=&PL_sv_undef)
557 SV * pathname 1526 SV8 * pathname
558 SV * callback 1527 SV * callback
1528 ALIAS:
1529 aio_unlink = REQ_UNLINK
1530 aio_rmdir = REQ_RMDIR
1531 aio_readdir = REQ_READDIR
1532 PPCODE:
1533{
1534 dREQ;
1535
1536 req->type = ix;
1537 req->sv1 = newSVsv (pathname);
1538 req->ptr1 = SvPVbyte_nolen (req->sv1);
1539
1540 REQ_SEND;
1541}
1542
1543void
1544aio_mkdir (pathname,mode,callback=&PL_sv_undef)
1545 SV8 * pathname
1546 UV mode
1547 SV * callback
1548 PPCODE:
1549{
1550 dREQ;
1551
1552 req->type = REQ_MKDIR;
1553 req->sv1 = newSVsv (pathname);
1554 req->ptr1 = SvPVbyte_nolen (req->sv1);
1555 req->mode = mode;
1556
1557 REQ_SEND;
1558}
1559
1560void
1561aio_link (oldpath,newpath,callback=&PL_sv_undef)
1562 SV8 * oldpath
1563 SV8 * newpath
1564 SV * callback
1565 ALIAS:
1566 aio_link = REQ_LINK
1567 aio_symlink = REQ_SYMLINK
1568 aio_rename = REQ_RENAME
1569 PPCODE:
1570{
1571 dREQ;
1572
1573 req->type = ix;
1574 req->fh = newSVsv (oldpath);
1575 req->ptr2 = SvPVbyte_nolen (req->fh);
1576 req->sv1 = newSVsv (newpath);
1577 req->ptr1 = SvPVbyte_nolen (req->sv1);
1578
1579 REQ_SEND;
1580}
1581
1582void
1583aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1584 SV8 * pathname
1585 UV mode
1586 UV dev
1587 SV * callback
1588 PPCODE:
1589{
1590 dREQ;
1591
1592 req->type = REQ_MKNOD;
1593 req->sv1 = newSVsv (pathname);
1594 req->ptr1 = SvPVbyte_nolen (req->sv1);
1595 req->mode = (mode_t)mode;
1596 req->offs = dev;
1597
1598 REQ_SEND;
1599}
1600
1601void
1602aio_busy (delay,callback=&PL_sv_undef)
1603 double delay
1604 SV * callback
1605 PPCODE:
1606{
1607 dREQ;
1608
1609 req->type = REQ_BUSY;
1610 req->int1 = delay < 0. ? 0 : delay;
1611 req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1612
1613 REQ_SEND;
1614}
1615
1616void
1617aio_group (callback=&PL_sv_undef)
1618 SV * callback
559 PROTOTYPE: $$ 1619 PROTOTYPE: ;$
1620 PPCODE:
1621{
1622 dREQ;
1623
1624 req->type = REQ_GROUP;
1625
1626 req_send (req);
1627 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1628}
1629
1630void
1631aio_nop (callback=&PL_sv_undef)
1632 SV * callback
1633 PPCODE:
1634{
1635 dREQ;
1636
1637 req->type = REQ_NOP;
1638
1639 REQ_SEND;
1640}
1641
1642int
1643aioreq_pri (int pri = 0)
1644 PROTOTYPE: ;$
560 CODE: 1645 CODE:
561{ 1646 RETVAL = next_pri - PRI_BIAS;
562 aio_req req; 1647 if (items > 0)
563 1648 {
564 Newz (0, req, 1, aio_cb); 1649 if (pri < PRI_MIN) pri = PRI_MIN;
565 1650 if (pri > PRI_MAX) pri = PRI_MAX;
566 if (!req) 1651 next_pri = pri + PRI_BIAS;
567 croak ("out of memory during aio_req allocation"); 1652 }
568 1653 OUTPUT:
569 req->type = REQ_UNLINK; 1654 RETVAL
570 req->data = newSVsv (pathname);
571 req->dataptr = SvPV_nolen (req->data);
572 req->callback = SvREFCNT_inc (callback);
573
574 send_req (req);
575}
576 1655
577void 1656void
1657aioreq_nice (int nice = 0)
1658 CODE:
1659 nice = next_pri - nice;
1660 if (nice < PRI_MIN) nice = PRI_MIN;
1661 if (nice > PRI_MAX) nice = PRI_MAX;
1662 next_pri = nice + PRI_BIAS;
1663
1664void
578flush() 1665flush ()
579 PROTOTYPE: 1666 PROTOTYPE:
580 CODE: 1667 CODE:
581 while (nreqs) 1668 while (nreqs)
582 { 1669 {
583 poll_wait (); 1670 poll_wait ();
584 poll_cb (); 1671 poll_cb ();
585 } 1672 }
586 1673
587int 1674int
1675poll()
1676 PROTOTYPE:
1677 CODE:
1678 poll_wait ();
1679 RETVAL = poll_cb ();
1680 OUTPUT:
1681 RETVAL
1682
1683int
588poll_fileno() 1684poll_fileno()
589 PROTOTYPE: 1685 PROTOTYPE:
590 CODE: 1686 CODE:
591 RETVAL = respipe [0]; 1687 RETVAL = respipe [0];
592 OUTPUT: 1688 OUTPUT:
… …
602 1698
603void 1699void
604poll_wait() 1700poll_wait()
605 PROTOTYPE: 1701 PROTOTYPE:
606 CODE: 1702 CODE:
607 if (nreqs)
608 poll_wait (); 1703 poll_wait ();
1704
1705void
1706setsig (int signum = SIGIO)
1707 PROTOTYPE: ;$
1708 CODE:
1709{
1710 if (block_sig_level)
1711 croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1712
1713 LOCK (reslock);
1714 main_tid = pthread_self ();
1715 main_sig = signum;
1716 UNLOCK (reslock);
1717
1718 if (main_sig && npending)
1719 pthread_kill (main_tid, main_sig);
1720}
1721
1722void
1723aio_block (SV *cb)
1724 PROTOTYPE: &
1725 PPCODE:
1726{
1727 int count;
1728
1729 block_sig ();
1730 PUSHMARK (SP);
1731 PUTBACK;
1732 count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
1733 SPAGAIN;
1734 unblock_sig ();
1735
1736 if (SvTRUE (ERRSV))
1737 croak (0);
1738
1739 XSRETURN (count);
1740}
609 1741
610int 1742int
611nreqs() 1743nreqs()
612 PROTOTYPE: 1744 PROTOTYPE:
613 CODE: 1745 CODE:
614 RETVAL = nreqs; 1746 RETVAL = nreqs;
615 OUTPUT: 1747 OUTPUT:
616 RETVAL 1748 RETVAL
617 1749
1750int
1751nready()
1752 PROTOTYPE:
1753 CODE:
1754 RETVAL = get_nready ();
1755 OUTPUT:
1756 RETVAL
1757
1758int
1759npending()
1760 PROTOTYPE:
1761 CODE:
1762 RETVAL = get_npending ();
1763 OUTPUT:
1764 RETVAL
1765
1766int
1767nthreads()
1768 PROTOTYPE:
1769 CODE:
1770 if (WORDACCESS_UNSAFE) LOCK (wrklock);
1771 RETVAL = started;
1772 if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1773 OUTPUT:
1774 RETVAL
1775
1776PROTOTYPES: DISABLE
1777
1778MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1779
1780void
1781cancel (aio_req_ornot req)
1782 CODE:
1783 req_cancel (req);
1784
1785void
1786cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1787 CODE:
1788 SvREFCNT_dec (req->callback);
1789 req->callback = newSVsv (callback);
1790
1791MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1792
1793void
1794add (aio_req grp, ...)
1795 PPCODE:
1796{
1797 int i;
1798 aio_req req;
1799
1800 if (main_sig && !block_sig_level)
1801 croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
1802
1803 if (grp->int1 == 2)
1804 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1805
1806 for (i = 1; i < items; ++i )
1807 {
1808 if (GIMME_V != G_VOID)
1809 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1810
1811 req = SvAIO_REQ (ST (i));
1812
1813 if (req)
1814 {
1815 ++grp->size;
1816 req->grp = grp;
1817
1818 req->grp_prev = 0;
1819 req->grp_next = grp->grp_first;
1820
1821 if (grp->grp_first)
1822 grp->grp_first->grp_prev = req;
1823
1824 grp->grp_first = req;
1825 }
1826 }
1827}
1828
1829void
1830cancel_subs (aio_req_ornot req)
1831 CODE:
1832 req_cancel_subs (req);
1833
1834void
1835result (aio_req grp, ...)
1836 CODE:
1837{
1838 int i;
1839 AV *av;
1840
1841 grp->errorno = errno;
1842
1843 av = newAV ();
1844
1845 for (i = 1; i < items; ++i )
1846 av_push (av, newSVsv (ST (i)));
1847
1848 SvREFCNT_dec (grp->sv1);
1849 grp->sv1 = (SV *)av;
1850}
1851
1852void
1853errno (aio_req grp, int errorno = errno)
1854 CODE:
1855 grp->errorno = errorno;
1856
1857void
1858limit (aio_req grp, int limit)
1859 CODE:
1860 grp->int2 = limit;
1861 aio_grp_feed (grp);
1862
1863void
1864feed (aio_req grp, SV *callback=&PL_sv_undef)
1865 CODE:
1866{
1867 SvREFCNT_dec (grp->sv2);
1868 grp->sv2 = newSVsv (callback);
1869
1870 if (grp->int2 <= 0)
1871 grp->int2 = 2;
1872
1873 aio_grp_feed (grp);
1874}
1875

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