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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 1.84 by root, Sat Oct 28 01:24:19 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/* number of seconds after which idle threads exit */
49#define IDLE_TIMEOUT 10
19 50
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 51/* used for struct dirent, AIX doesn't provide it */
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 52#ifndef NAME_MAX
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 53# define NAME_MAX 4096
54#endif
55
56#ifndef PTHREAD_STACK_MIN
57/* care for broken platforms, e.g. windows */
58# define PTHREAD_STACK_MIN 16384
59#endif
23 60
24#if __ia64 61#if __ia64
25# define STACKSIZE 65536 62# define STACKSIZE 65536
63#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
64# define STACKSIZE PTHREAD_STACK_MIN
26#else 65#else
27# define STACKSIZE 4096 66# define STACKSIZE 16384
67#endif
68
69/* wether word reads are potentially non-atomic.
70 * this is conservatice, likely most arches this runs
71 * on have atomic word read/writes.
72 */
73#ifndef WORDREAD_UNSAFE
74# if __i386 || __x86_64
75# define WORDREAD_UNSAFE 0
76# else
77# define WORDREAD_UNSAFE 1
28#endif 78# endif
79#endif
80
81/* buffer size for various temporary buffers */
82#define AIO_BUFSIZE 65536
83
84#define dBUF \
85 char *aio_buf; \
86 LOCK (wrklock); \
87 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
88 UNLOCK (wrklock); \
89 if (!aio_buf) \
90 return -1;
29 91
30enum { 92enum {
31 REQ_QUIT, 93 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 94 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 95 REQ_READ, REQ_WRITE, REQ_READAHEAD,
96 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 97 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 98 REQ_FSYNC, REQ_FDATASYNC,
99 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
100 REQ_MKNOD, REQ_READDIR,
101 REQ_LINK, REQ_SYMLINK,
102 REQ_GROUP, REQ_NOP,
103 REQ_BUSY,
36}; 104};
37 105
106#define AIO_REQ_KLASS "IO::AIO::REQ"
107#define AIO_GRP_KLASS "IO::AIO::GRP"
108
38typedef struct aio_cb { 109typedef struct aio_cb
110{
39 struct aio_cb *volatile next; 111 struct aio_cb *volatile next;
40 112
41 int type; 113 SV *data, *callback;
42 114 SV *fh, *fh2;
43 int fd; 115 void *dataptr, *data2ptr;
116 Stat_t *statdata;
44 off_t offset; 117 off_t offset;
45 size_t length; 118 size_t length;
46 ssize_t result; 119 ssize_t result;
120
121 STRLEN dataoffset;
122 int type;
123 int fd, fd2;
124 int errorno;
47 mode_t mode; /* open */ 125 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 126
53 Stat_t *statdata; 127 unsigned char flags;
128 unsigned char pri;
129
130 SV *self; /* the perl counterpart of this request, if any */
131 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 132} aio_cb;
55 133
134enum {
135 FLAG_CANCELLED = 0x01,
136};
137
56typedef aio_cb *aio_req; 138typedef aio_cb *aio_req;
139typedef aio_cb *aio_req_ornot;
57 140
58static int started; 141enum {
59static int nreqs; 142 PRI_MIN = -4,
60static int max_outstanding = 1<<30; 143 PRI_MAX = 4,
144
145 DEFAULT_PRI = 0,
146 PRI_BIAS = -PRI_MIN,
147 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148};
149
150static int next_pri = DEFAULT_PRI + PRI_BIAS;
151
152static unsigned int started, idle, wanted;
153
154#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
155# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
156#else
157# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
158#endif
159
160#define LOCK(mutex) pthread_mutex_lock (&(mutex))
161#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
162
163/* worker threads management */
164static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
165
166typedef struct worker {
167 /* locked by wrklock */
168 struct worker *prev, *next;
169
170 pthread_t tid;
171
172 /* locked by reslock, reqlock or wrklock */
173 aio_req req; /* currently processed request */
174 void *dbuf;
175 DIR *dirp;
176} worker;
177
178static worker wrk_first = { &wrk_first, &wrk_first, 0 };
179
180static void worker_clear (worker *wrk)
181{
182 if (wrk->dirp)
183 {
184 closedir (wrk->dirp);
185 wrk->dirp = 0;
186 }
187
188 if (wrk->dbuf)
189 {
190 free (wrk->dbuf);
191 wrk->dbuf = 0;
192 }
193}
194
195static void worker_free (worker *wrk)
196{
197 wrk->next->prev = wrk->prev;
198 wrk->prev->next = wrk->next;
199
200 free (wrk);
201}
202
203static volatile unsigned int nreqs, nready, npending;
204static volatile unsigned int max_idle = 4;
205static volatile unsigned int max_outstanding = 0xffffffff;
61static int respipe [2]; 206static int respipe [2];
62 207
63static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 208static pthread_mutex_t reslock = AIO_MUTEX_INIT;
64static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 209static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
65static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 210static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66 211
67static volatile aio_req reqs, reqe; /* queue start, queue end */ 212#if WORDREAD_UNSAFE
68static volatile aio_req ress, rese; /* queue start, queue end */
69 213
70static void 214static unsigned int get_nready ()
71poll_wait ()
72{ 215{
73 if (!nreqs) 216 unsigned int retval;
217
218 LOCK (reqlock);
219 retval = nready;
220 UNLOCK (reqlock);
221
222 return retval;
223}
224
225static unsigned int get_npending ()
226{
227 unsigned int retval;
228
229 LOCK (reslock);
230 retval = npending;
231 UNLOCK (reslock);
232
233 return retval;
234}
235
236#else
237
238# define get_nready() nready
239# define get_npending() npending
240
241#endif
242
243/*
244 * a somewhat faster data structure might be nice, but
245 * with 8 priorities this actually needs <20 insns
246 * per shift, the most expensive operation.
247 */
248typedef struct {
249 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
250 int size;
251} reqq;
252
253static reqq req_queue;
254static reqq res_queue;
255
256int reqq_push (reqq *q, aio_req req)
257{
258 int pri = req->pri;
259 req->next = 0;
260
261 if (q->qe[pri])
262 {
263 q->qe[pri]->next = req;
264 q->qe[pri] = req;
265 }
266 else
267 q->qe[pri] = q->qs[pri] = req;
268
269 return q->size++;
270}
271
272aio_req reqq_shift (reqq *q)
273{
274 int pri;
275
276 if (!q->size)
74 return; 277 return 0;
75 278
76 fd_set rfd; 279 --q->size;
77 FD_ZERO(&rfd);
78 FD_SET(respipe [0], &rfd);
79 280
80 select (respipe [0] + 1, &rfd, 0, 0, 0); 281 for (pri = NUM_PRI; pri--; )
81} 282 {
283 aio_req req = q->qs[pri];
82 284
83static int 285 if (req)
84poll_cb () 286 {
287 if (!(q->qs[pri] = req->next))
288 q->qe[pri] = 0;
289
290 return req;
291 }
292 }
293
294 abort ();
295}
296
297static int poll_cb (int max);
298static void req_invoke (aio_req req);
299static void req_free (aio_req req);
300static void req_cancel (aio_req req);
301
302/* must be called at most once */
303static SV *req_sv (aio_req req, const char *klass)
304{
305 if (!req->self)
306 {
307 req->self = (SV *)newHV ();
308 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
309 }
310
311 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
312}
313
314static aio_req SvAIO_REQ (SV *sv)
315{
316 MAGIC *mg;
317
318 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
319 croak ("object of class " AIO_REQ_KLASS " expected");
320
321 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
322
323 return mg ? (aio_req)mg->mg_ptr : 0;
324}
325
326static void aio_grp_feed (aio_req grp)
327{
328 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
329 {
330 int old_len = grp->length;
331
332 if (grp->fh2 && SvOK (grp->fh2))
333 {
334 dSP;
335
336 ENTER;
337 SAVETMPS;
338 PUSHMARK (SP);
339 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
340 PUTBACK;
341 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
342 SPAGAIN;
343 FREETMPS;
344 LEAVE;
345 }
346
347 /* stop if no progress has been made */
348 if (old_len == grp->length)
349 {
350 SvREFCNT_dec (grp->fh2);
351 grp->fh2 = 0;
352 break;
353 }
354 }
355}
356
357static void aio_grp_dec (aio_req grp)
358{
359 --grp->length;
360
361 /* call feeder, if applicable */
362 aio_grp_feed (grp);
363
364 /* finish, if done */
365 if (!grp->length && grp->fd)
366 {
367 req_invoke (grp);
368 req_free (grp);
369 }
370}
371
372static void req_invoke (aio_req req)
85{ 373{
86 dSP; 374 dSP;
87 int count = 0; 375
88 aio_req req; 376 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
89
90 { 377 {
91 /* read and signals sent by the worker threads */ 378 ENTER;
92 char buf [32]; 379 SAVETMPS;
93 while (read (respipe [0], buf, 32) > 0) 380 PUSHMARK (SP);
94 ; 381 EXTEND (SP, 1);
95 }
96 382
97 for (;;) 383 switch (req->type)
98 {
99 pthread_mutex_lock (&reslock);
100
101 req = ress;
102
103 if (ress)
104 { 384 {
105 ress = ress->next; 385 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 { 386 {
132 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 387 SV *rv = &PL_sv_undef;
133 PL_laststatval = req->result;
134 PL_statcache = *(req->statdata);
135 388
136 Safefree (req->statdata); 389 if (req->result >= 0)
390 {
391 int i;
392 char *buf = req->data2ptr;
393 AV *av = newAV ();
394
395 av_extend (av, req->result - 1);
396
397 for (i = 0; i < req->result; ++i)
398 {
399 SV *sv = newSVpv (buf, 0);
400
401 av_store (av, i, sv);
402 buf += SvCUR (sv) + 1;
403 }
404
405 rv = sv_2mortal (newRV_noinc ((SV *)av));
406 }
407
408 PUSHs (rv);
137 } 409 }
410 break;
138 411
139 PUSHMARK (SP); 412 case REQ_OPEN:
140 XPUSHs (sv_2mortal (newSViv (req->result)));
141
142 if (req->type == REQ_OPEN)
143 { 413 {
144 /* convert fd to fh */ 414 /* convert fd to fh */
145 SV *fh; 415 SV *fh;
146 416
417 PUSHs (sv_2mortal (newSViv (req->result)));
147 PUTBACK; 418 PUTBACK;
148 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 419 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149 SPAGAIN; 420 SPAGAIN;
150 421
151 fh = POPs; 422 fh = SvREFCNT_inc (POPs);
152 423
153 PUSHMARK (SP); 424 PUSHMARK (SP);
154 XPUSHs (fh); 425 XPUSHs (sv_2mortal (fh));
155 } 426 }
427 break;
156 428
157 if (SvOK (req->callback)) 429 case REQ_GROUP:
430 req->fd = 2; /* mark group as finished */
431
432 if (req->data)
158 { 433 {
159 PUTBACK; 434 int i;
160 call_sv (req->callback, G_VOID | G_EVAL); 435 AV *av = (AV *)req->data;
161 SPAGAIN; 436
437 EXTEND (SP, AvFILL (av) + 1);
438 for (i = 0; i <= AvFILL (av); ++i)
439 PUSHs (*av_fetch (av, i, 0));
162 } 440 }
163 441 break;
164 if (req->callback)
165 SvREFCNT_dec (req->callback);
166 442
167 errno = errorno; 443 case REQ_NOP:
168 count++; 444 case REQ_BUSY:
445 break;
446
447 default:
448 PUSHs (sv_2mortal (newSViv (req->result)));
449 break;
169 } 450 }
170 451
452 errno = req->errorno;
453
454 PUTBACK;
455 call_sv (req->callback, G_VOID | G_EVAL);
456 SPAGAIN;
457
458 FREETMPS;
459 LEAVE;
460 }
461
462 if (req->grp)
463 {
464 aio_req grp = req->grp;
465
466 /* unlink request */
467 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
468 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
469
470 if (grp->grp_first == req)
471 grp->grp_first = req->grp_next;
472
473 aio_grp_dec (grp);
474 }
475
476 if (SvTRUE (ERRSV))
477 {
478 req_free (req);
479 croak (0);
480 }
481}
482
483static void req_free (aio_req req)
484{
485 if (req->self)
486 {
487 sv_unmagic (req->self, PERL_MAGIC_ext);
488 SvREFCNT_dec (req->self);
489 }
490
491 SvREFCNT_dec (req->data);
492 SvREFCNT_dec (req->fh);
493 SvREFCNT_dec (req->fh2);
494 SvREFCNT_dec (req->callback);
495 Safefree (req->statdata);
496
497 if (req->type == REQ_READDIR)
498 free (req->data2ptr);
499
171 Safefree (req); 500 Safefree (req);
172 } 501}
173 502
174 return count; 503static void req_cancel_subs (aio_req grp)
504{
505 aio_req sub;
506
507 if (grp->type != REQ_GROUP)
508 return;
509
510 SvREFCNT_dec (grp->fh2);
511 grp->fh2 = 0;
512
513 for (sub = grp->grp_first; sub; sub = sub->grp_next)
514 req_cancel (sub);
515}
516
517static void req_cancel (aio_req req)
518{
519 req->flags |= FLAG_CANCELLED;
520
521 req_cancel_subs (req);
175} 522}
176 523
177static void *aio_proc(void *arg); 524static void *aio_proc(void *arg);
178 525
179static void
180start_thread (void) 526static void start_thread (void)
181{ 527{
182 sigset_t fullsigset, oldsigset; 528 sigset_t fullsigset, oldsigset;
183 pthread_t tid;
184 pthread_attr_t attr; 529 pthread_attr_t attr;
530
531 worker *wrk = calloc (1, sizeof (worker));
532
533 if (!wrk)
534 croak ("unable to allocate worker thread data");
185 535
186 pthread_attr_init (&attr); 536 pthread_attr_init (&attr);
187 pthread_attr_setstacksize (&attr, STACKSIZE); 537 pthread_attr_setstacksize (&attr, STACKSIZE);
188 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 538 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
539#ifdef PTHREAD_SCOPE_PROCESS
540 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
541#endif
189 542
190 sigfillset (&fullsigset); 543 sigfillset (&fullsigset);
544
545 LOCK (wrklock);
191 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 546 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
192 547
193 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 548 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
549 {
550 wrk->prev = &wrk_first;
551 wrk->next = wrk_first.next;
552 wrk_first.next->prev = wrk;
553 wrk_first.next = wrk;
194 started++; 554 ++started;
555 }
556 else
557 free (wrk);
195 558
196 sigprocmask (SIG_SETMASK, &oldsigset, 0); 559 sigprocmask (SIG_SETMASK, &oldsigset, 0);
560 UNLOCK (wrklock);
197} 561}
198 562
199static void 563static void maybe_start_thread ()
200send_req (aio_req req)
201{ 564{
565 if (started >= wanted)
566 return;
567
568 /* todo: maybe use idle here, but might be less exact */
569 if ((int)nready <= (int)started - (int)(nreqs - get_nready () - get_npending ()))
570 return;
571
572 start_thread ();
573}
574
575static void req_send (aio_req req)
576{
202 nreqs++; 577 ++nreqs;
203 578
204 pthread_mutex_lock (&reqlock); 579 LOCK (reqlock);
580 ++nready;
581 reqq_push (&req_queue, req);
582 pthread_cond_signal (&reqwait);
583 UNLOCK (reqlock);
205 584
206 req->next = 0; 585 maybe_start_thread ();
586}
207 587
588static void end_thread (void)
589{
590 aio_req req;
591
592 Newz (0, req, 1, aio_cb);
593
594 req->type = REQ_QUIT;
595 req->pri = PRI_MAX + PRI_BIAS;
596
597 LOCK (reqlock);
598 reqq_push (&req_queue, req);
599 pthread_cond_signal (&reqwait);
600 UNLOCK (reqlock);
601
602 LOCK (wrklock);
603 --started;
604 UNLOCK (wrklock);
605}
606
607static void min_parallel (int nthreads)
608{
609 if (wanted < nthreads)
610 wanted = nthreads;
611}
612
613static void max_parallel (int nthreads)
614{
615 if (wanted > nthreads)
616 wanted = nthreads;
617
618 while (started > wanted)
619 end_thread ();
620}
621
622static void poll_wait ()
623{
624 fd_set rfd;
625
626 while (nreqs)
627 {
628 int size;
629 if (WORDREAD_UNSAFE) LOCK (reslock);
630 size = res_queue.size;
631 if (WORDREAD_UNSAFE) UNLOCK (reslock);
632
633 if (size)
634 return;
635
636 maybe_start_thread ();
637
638 FD_ZERO(&rfd);
639 FD_SET(respipe [0], &rfd);
640
641 select (respipe [0] + 1, &rfd, 0, 0, 0);
642 }
643}
644
645static int poll_cb (int max)
646{
647 dSP;
648 int count = 0;
649 int do_croak = 0;
650 aio_req req;
651
652 for (;;)
653 {
654 while (max <= 0 || count < max)
655 {
656 maybe_start_thread ();
657
658 LOCK (reslock);
659 req = reqq_shift (&res_queue);
660
661 if (req)
662 {
663 --npending;
664
665 if (!res_queue.size)
666 {
667 /* read any signals sent by the worker threads */
668 char buf [32];
669 while (read (respipe [0], buf, 32) == 32)
670 ;
671 }
672 }
673
674 UNLOCK (reslock);
675
676 if (!req)
677 break;
678
679 --nreqs;
680
681 if (req->type == REQ_GROUP && req->length)
682 {
683 req->fd = 1; /* mark request as delayed */
684 continue;
685 }
686 else
687 {
688 if (req->type == REQ_READ)
689 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
690
691 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
692 SvREADONLY_off (req->data);
693
694 if (req->statdata)
695 {
696 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
697 PL_laststatval = req->result;
698 PL_statcache = *(req->statdata);
699 }
700
701 req_invoke (req);
702
703 count++;
704 }
705
706 req_free (req);
707 }
708
709 if (nreqs <= max_outstanding)
710 break;
711
712 poll_wait ();
713
714 max = 0;
715 }
716
717 return count;
718}
719
720static void create_pipe ()
721{
722 if (pipe (respipe))
723 croak ("unable to initialize result pipe");
724
725 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
726 croak ("cannot set result pipe to nonblocking mode");
727
728 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
729 croak ("cannot set result pipe to nonblocking mode");
730}
731
732/*****************************************************************************/
733/* work around various missing functions */
734
735#if !HAVE_PREADWRITE
736# define pread aio_pread
737# define pwrite aio_pwrite
738
739/*
740 * make our pread/pwrite safe against themselves, but not against
741 * normal read/write by using a mutex. slows down execution a lot,
742 * but that's your problem, not mine.
743 */
744static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
745
746static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
747{
748 ssize_t res;
749 off_t ooffset;
750
751 LOCK (preadwritelock);
752 ooffset = lseek (fd, 0, SEEK_CUR);
753 lseek (fd, offset, SEEK_SET);
754 res = read (fd, buf, count);
755 lseek (fd, ooffset, SEEK_SET);
756 UNLOCK (preadwritelock);
757
758 return res;
759}
760
761static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
762{
763 ssize_t res;
764 off_t ooffset;
765
766 LOCK (preadwritelock);
767 ooffset = lseek (fd, 0, SEEK_CUR);
768 lseek (fd, offset, SEEK_SET);
769 res = write (fd, buf, count);
770 lseek (fd, offset, SEEK_SET);
771 UNLOCK (preadwritelock);
772
773 return res;
774}
775#endif
776
777#if !HAVE_FDATASYNC
778# define fdatasync fsync
779#endif
780
781#if !HAVE_READAHEAD
782# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
783
784static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
785{
786 dBUF;
787
788 while (count > 0)
789 {
790 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
791
792 pread (fd, aio_buf, len, offset);
793 offset += len;
794 count -= len;
795 }
796
797 errno = 0;
798}
799
800#endif
801
802#if !HAVE_READDIR_R
803# define readdir_r aio_readdir_r
804
805static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
806
807static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
808{
809 struct dirent *e;
810 int errorno;
811
812 LOCK (readdirlock);
813
814 e = readdir (dirp);
815 errorno = errno;
816
208 if (reqe) 817 if (e)
209 { 818 {
210 reqe->next = req; 819 *res = ent;
211 reqe = req; 820 strcpy (ent->d_name, e->d_name);
212 } 821 }
213 else 822 else
214 reqe = reqs = req; 823 *res = 0;
215 824
216 pthread_cond_signal (&reqwait); 825 UNLOCK (readdirlock);
217 pthread_mutex_unlock (&reqlock);
218 826
219 while (nreqs > max_outstanding) 827 errno = errorno;
828 return e ? 0 : -1;
829}
830#endif
831
832/* sendfile always needs emulation */
833static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
834{
835 ssize_t res;
836
837 if (!count)
838 return 0;
839
840#if HAVE_SENDFILE
841# if __linux
842 res = sendfile (ofd, ifd, &offset, count);
843
844# elif __freebsd
845 /*
846 * Of course, the freebsd sendfile is a dire hack with no thoughts
847 * wasted on making it similar to other I/O functions.
848 */
849 {
850 off_t sbytes;
851 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
852
853 if (res < 0 && sbytes)
854 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
855 res = sbytes;
856 }
857
858# elif __hpux
859 res = sendfile (ofd, ifd, offset, count, 0, 0);
860
861# elif __solaris
862 {
863 struct sendfilevec vec;
864 size_t sbytes;
865
866 vec.sfv_fd = ifd;
867 vec.sfv_flag = 0;
868 vec.sfv_off = offset;
869 vec.sfv_len = count;
870
871 res = sendfilev (ofd, &vec, 1, &sbytes);
872
873 if (res < 0 && sbytes)
874 res = sbytes;
875 }
876
877# endif
878#else
879 res = -1;
880 errno = ENOSYS;
881#endif
882
883 if (res < 0
884 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
885#if __solaris
886 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
887#endif
888 )
889 )
890 {
891 /* emulate sendfile. this is a major pain in the ass */
892 dBUF;
893
894 res = 0;
895
896 while (count)
897 {
898 ssize_t cnt;
899
900 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
901
902 if (cnt <= 0)
903 {
904 if (cnt && !res) res = -1;
905 break;
906 }
907
908 cnt = write (ofd, aio_buf, cnt);
909
910 if (cnt <= 0)
911 {
912 if (cnt && !res) res = -1;
913 break;
914 }
915
916 offset += cnt;
917 res += cnt;
918 count -= cnt;
919 }
920 }
921
922 return res;
923}
924
925/* read a full directory */
926static void scandir_ (aio_req req, worker *self)
927{
928 DIR *dirp;
929 union
930 {
931 struct dirent d;
932 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
933 } *u;
934 struct dirent *entp;
935 char *name, *names;
936 int memlen = 4096;
937 int memofs = 0;
938 int res = 0;
939 int errorno;
940
941 LOCK (wrklock);
942 self->dirp = dirp = opendir (req->dataptr);
943 self->dbuf = u = malloc (sizeof (*u));
944 req->data2ptr = names = malloc (memlen);
945 UNLOCK (wrklock);
946
947 if (dirp && u && names)
948 for (;;)
220 { 949 {
221 poll_wait (); 950 errno = 0;
222 poll_cb (); 951 readdir_r (dirp, &u->d, &entp);
952
953 if (!entp)
954 break;
955
956 name = entp->d_name;
957
958 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
959 {
960 int len = strlen (name) + 1;
961
962 res++;
963
964 while (memofs + len > memlen)
965 {
966 memlen *= 2;
967 LOCK (wrklock);
968 req->data2ptr = names = realloc (names, memlen);
969 UNLOCK (wrklock);
970
971 if (!names)
972 break;
973 }
974
975 memcpy (names + memofs, name, len);
976 memofs += len;
977 }
223 } 978 }
224}
225 979
226static void 980 if (errno)
227end_thread (void) 981 res = -1;
982
983 req->result = res;
984}
985
986/*****************************************************************************/
987
988static void *aio_proc (void *thr_arg)
228{ 989{
229 aio_req req; 990 aio_req req;
230 New (0, req, 1, aio_cb); 991 struct timespec ts;
231 req->type = REQ_QUIT; 992 worker *self = (worker *)thr_arg;
232 993
233 send_req (req); 994 /* try to distribute timeouts somewhat evenly */
234} 995 ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
996 * (1000000000UL / 1024UL);
235 997
236static void 998 for (;;)
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
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 } 999 {
259 else 1000 ts.tv_sec = time (0) + IDLE_TIMEOUT;
260 {
261 /* read: grow scalar as necessary */
262 svptr = SvGROW (data, length + dataoffset);
263 }
264 1001
265 if (length < 0) 1002 LOCK (reqlock);
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)
286{
287 aio_req req;
288 int type;
289
290 do
291 {
292 pthread_mutex_lock (&reqlock);
293 1003
294 for (;;) 1004 for (;;)
295 { 1005 {
296 req = reqs; 1006 self->req = req = reqq_shift (&req_queue);
297
298 if (reqs)
299 {
300 reqs = reqs->next;
301 if (!reqs) reqe = 0;
302 }
303 1007
304 if (req) 1008 if (req)
305 break; 1009 break;
306 1010
1011 ++idle;
1012
1013 if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1014 == ETIMEDOUT)
1015 {
1016 if (idle > max_idle)
1017 {
1018 --idle;
1019 UNLOCK (reqlock);
1020 LOCK (wrklock);
1021 --started;
1022 UNLOCK (wrklock);
1023 goto quit;
1024 }
1025
1026 /* we are allowed to idle, so do so without any timeout */
307 pthread_cond_wait (&reqwait, &reqlock); 1027 pthread_cond_wait (&reqwait, &reqlock);
1028 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1029 }
1030
1031 --idle;
308 } 1032 }
309 1033
310 pthread_mutex_unlock (&reqlock); 1034 --nready;
1035
1036 UNLOCK (reqlock);
311 1037
312 errno = 0; /* strictly unnecessary */ 1038 errno = 0; /* strictly unnecessary */
313 1039
314 type = req->type; 1040 if (!(req->flags & FLAG_CANCELLED))
315
316 switch (type) 1041 switch (req->type)
317 { 1042 {
318 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 1043 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; 1044 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
320#if SYS_readahead 1045
321 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 1046 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
322#else 1047 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 1048
326 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 1049 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
327 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 1050 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
328 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 1051 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
329 1052
330 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 1053 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
331 case REQ_CLOSE: req->result = close (req->fd); break; 1054 case REQ_CLOSE: req->result = close (req->fd); break;
332 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 1055 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
333
334 case REQ_FSYNC: req->result = fsync (req->fd); break; 1056 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1057 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1058 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1059 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1060 case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1061
335 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 1062 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1063 case REQ_FSYNC: req->result = fsync (req->fd); break;
1064 case REQ_READDIR: scandir_ (req, self); break;
336 1065
1066 case REQ_BUSY:
1067 {
1068 struct timeval tv;
1069
1070 tv.tv_sec = req->fd;
1071 tv.tv_usec = req->fd2;
1072
1073 req->result = select (0, 0, 0, 0, &tv);
1074 }
1075
1076 case REQ_GROUP:
1077 case REQ_NOP:
1078 break;
1079
337 case REQ_QUIT: 1080 case REQ_QUIT:
338 break; 1081 goto quit;
339 1082
340 default: 1083 default:
341 req->result = ENOSYS; 1084 req->result = ENOSYS;
342 break; 1085 break;
343 } 1086 }
344 1087
345 req->errorno = errno; 1088 req->errorno = errno;
346 1089
347 pthread_mutex_lock (&reslock); 1090 LOCK (reslock);
348 1091
349 req->next = 0; 1092 ++npending;
350 1093
351 if (rese) 1094 if (!reqq_push (&res_queue, req))
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 */ 1095 /* write a dummy byte to the pipe so fh becomes ready */
361 write (respipe [1], &respipe, 1); 1096 write (respipe [1], &respipe, 1);
362 }
363 1097
364 pthread_mutex_unlock (&reslock); 1098 self->req = 0;
1099 worker_clear (self);
1100
1101 UNLOCK (reslock);
365 } 1102 }
366 while (type != REQ_QUIT); 1103
1104quit:
1105 LOCK (wrklock);
1106 worker_free (self);
1107 UNLOCK (wrklock);
367 1108
368 return 0; 1109 return 0;
369} 1110}
370 1111
1112/*****************************************************************************/
1113
1114static void atfork_prepare (void)
1115{
1116 LOCK (wrklock);
1117 LOCK (reqlock);
1118 LOCK (reslock);
1119#if !HAVE_PREADWRITE
1120 LOCK (preadwritelock);
1121#endif
1122#if !HAVE_READDIR_R
1123 LOCK (readdirlock);
1124#endif
1125}
1126
1127static void atfork_parent (void)
1128{
1129#if !HAVE_READDIR_R
1130 UNLOCK (readdirlock);
1131#endif
1132#if !HAVE_PREADWRITE
1133 UNLOCK (preadwritelock);
1134#endif
1135 UNLOCK (reslock);
1136 UNLOCK (reqlock);
1137 UNLOCK (wrklock);
1138}
1139
1140static void atfork_child (void)
1141{
1142 aio_req prv;
1143
1144 while (prv = reqq_shift (&req_queue))
1145 req_free (prv);
1146
1147 while (prv = reqq_shift (&res_queue))
1148 req_free (prv);
1149
1150 while (wrk_first.next != &wrk_first)
1151 {
1152 worker *wrk = wrk_first.next;
1153
1154 if (wrk->req)
1155 req_free (wrk->req);
1156
1157 worker_clear (wrk);
1158 worker_free (wrk);
1159 }
1160
1161 started = 0;
1162 idle = 0;
1163 nreqs = 0;
1164 nready = 0;
1165 npending = 0;
1166
1167 close (respipe [0]);
1168 close (respipe [1]);
1169 create_pipe ();
1170
1171 atfork_parent ();
1172}
1173
1174#define dREQ \
1175 aio_req req; \
1176 int req_pri = next_pri; \
1177 next_pri = DEFAULT_PRI + PRI_BIAS; \
1178 \
1179 if (SvOK (callback) && !SvROK (callback)) \
1180 croak ("callback must be undef or of reference type"); \
1181 \
1182 Newz (0, req, 1, aio_cb); \
1183 if (!req) \
1184 croak ("out of memory during aio_req allocation"); \
1185 \
1186 req->callback = newSVsv (callback); \
1187 req->pri = req_pri
1188
1189#define REQ_SEND \
1190 req_send (req); \
1191 \
1192 if (GIMME_V != G_VOID) \
1193 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1194
371MODULE = IO::AIO PACKAGE = IO::AIO 1195MODULE = IO::AIO PACKAGE = IO::AIO
372 1196
373PROTOTYPES: ENABLE 1197PROTOTYPES: ENABLE
374 1198
375BOOT: 1199BOOT:
376{ 1200{
377 if (pipe (respipe)) 1201 HV *stash = gv_stashpv ("IO::AIO", 1);
378 croak ("unable to initialize result pipe");
379 1202
380 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1203 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
381 croak ("cannot set result pipe to nonblocking mode"); 1204 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1205 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1206 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1207 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1208 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
382 1209
383 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 1210 create_pipe ();
384 croak ("cannot set result pipe to nonblocking mode"); 1211 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
385} 1212}
386 1213
387void 1214void
388min_parallel(nthreads) 1215min_parallel (int nthreads)
389 int nthreads 1216 PROTOTYPE: $
1217
1218void
1219max_parallel (int nthreads)
1220 PROTOTYPE: $
1221
1222int
1223max_outstanding (int maxreqs)
390 PROTOTYPE: $ 1224 PROTOTYPE: $
391 CODE: 1225 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; 1226 RETVAL = max_outstanding;
421 max_outstanding = nreqs; 1227 max_outstanding = maxreqs;
1228 OUTPUT:
1229 RETVAL
422 1230
423void 1231void
424aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1232aio_open (pathname,flags,mode,callback=&PL_sv_undef)
425 SV * pathname 1233 SV * pathname
426 int flags 1234 int flags
427 int mode 1235 int mode
428 SV * callback 1236 SV * callback
429 PROTOTYPE: $$$;$ 1237 PROTOTYPE: $$$;$
430 CODE: 1238 PPCODE:
431{ 1239{
432 aio_req req; 1240 dREQ;
433
434 Newz (0, req, 1, aio_cb);
435
436 if (!req)
437 croak ("out of memory during aio_req allocation");
438 1241
439 req->type = REQ_OPEN; 1242 req->type = REQ_OPEN;
440 req->data = newSVsv (pathname); 1243 req->data = newSVsv (pathname);
441 req->dataptr = SvPV_nolen (req->data); 1244 req->dataptr = SvPVbyte_nolen (req->data);
442 req->fd = flags; 1245 req->fd = flags;
443 req->mode = mode; 1246 req->mode = mode;
444 req->callback = SvREFCNT_inc (callback);
445 1247
446 send_req (req); 1248 REQ_SEND;
447} 1249}
448 1250
449void 1251void
450aio_close(fh,callback=&PL_sv_undef) 1252aio_close (fh,callback=&PL_sv_undef)
451 InputStream fh 1253 SV * fh
452 SV * callback 1254 SV * callback
453 PROTOTYPE: $;$ 1255 PROTOTYPE: $;$
454 ALIAS: 1256 ALIAS:
455 aio_close = REQ_CLOSE 1257 aio_close = REQ_CLOSE
456 aio_fsync = REQ_FSYNC 1258 aio_fsync = REQ_FSYNC
457 aio_fdatasync = REQ_FDATASYNC 1259 aio_fdatasync = REQ_FDATASYNC
458 CODE: 1260 PPCODE:
1261{
1262 dREQ;
1263
1264 req->type = ix;
1265 req->fh = newSVsv (fh);
1266 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1267
1268 REQ_SEND (req);
1269}
1270
1271void
1272aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1273 SV * fh
1274 UV offset
1275 UV length
1276 SV * data
1277 UV dataoffset
1278 SV * callback
1279 ALIAS:
1280 aio_read = REQ_READ
1281 aio_write = REQ_WRITE
1282 PROTOTYPE: $$$$$;$
1283 PPCODE:
459{ 1284{
460 aio_req req; 1285 aio_req req;
1286 STRLEN svlen;
1287 char *svptr = SvPVbyte (data, svlen);
461 1288
462 Newz (0, req, 1, aio_cb); 1289 SvUPGRADE (data, SVt_PV);
1290 SvPOK_on (data);
463 1291
464 if (!req) 1292 if (dataoffset < 0)
465 croak ("out of memory during aio_req allocation"); 1293 dataoffset += svlen;
466 1294
467 req->type = ix; 1295 if (dataoffset < 0 || dataoffset > svlen)
468 req->fd = PerlIO_fileno (fh); 1296 croak ("data offset outside of string");
469 req->callback = SvREFCNT_inc (callback);
470 1297
471 send_req (req); 1298 if (ix == REQ_WRITE)
472} 1299 {
473 1300 /* write: check length and adjust. */
474void 1301 if (length < 0 || length + dataoffset > svlen)
475aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1302 length = svlen - dataoffset;
476 InputStream fh 1303 }
477 UV offset 1304 else
478 IV length 1305 {
479 SV * data 1306 /* read: grow scalar as necessary */
480 IV dataoffset 1307 svptr = SvGROW (data, length + dataoffset);
481 SV * callback 1308 }
482 PROTOTYPE: $$$$$;$
483 CODE:
484 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
485
486void
487aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
488 OutputStream fh
489 UV offset
490 IV length
491 SV * data
492 IV dataoffset
493 SV * callback
494 PROTOTYPE: $$$$$;$
495 CODE:
496 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
497
498void
499aio_readahead(fh,offset,length,callback=&PL_sv_undef)
500 InputStream fh
501 UV offset
502 IV length
503 SV * callback
504 PROTOTYPE: $$$;$
505 CODE:
506{
507 aio_req req;
508 1309
509 if (length < 0) 1310 if (length < 0)
510 croak ("length must not be negative"); 1311 croak ("length must not be negative");
511 1312
512 Newz (0, req, 1, aio_cb); 1313 {
1314 dREQ;
513 1315
514 if (!req) 1316 req->type = ix;
515 croak ("out of memory during aio_req allocation"); 1317 req->fh = newSVsv (fh);
1318 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1319 : IoOFP (sv_2io (fh)));
1320 req->offset = offset;
1321 req->length = length;
1322 req->data = SvREFCNT_inc (data);
1323 req->dataptr = (char *)svptr + dataoffset;
1324
1325 if (!SvREADONLY (data))
1326 {
1327 SvREADONLY_on (data);
1328 req->data2ptr = (void *)data;
1329 }
1330
1331 REQ_SEND;
1332 }
1333}
1334
1335void
1336aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1337 SV * out_fh
1338 SV * in_fh
1339 UV in_offset
1340 UV length
1341 SV * callback
1342 PROTOTYPE: $$$$;$
1343 PPCODE:
1344{
1345 dREQ;
1346
1347 req->type = REQ_SENDFILE;
1348 req->fh = newSVsv (out_fh);
1349 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1350 req->fh2 = newSVsv (in_fh);
1351 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1352 req->offset = in_offset;
1353 req->length = length;
1354
1355 REQ_SEND;
1356}
1357
1358void
1359aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1360 SV * fh
1361 UV offset
1362 IV length
1363 SV * callback
1364 PROTOTYPE: $$$;$
1365 PPCODE:
1366{
1367 dREQ;
516 1368
517 req->type = REQ_READAHEAD; 1369 req->type = REQ_READAHEAD;
1370 req->fh = newSVsv (fh);
518 req->fd = PerlIO_fileno (fh); 1371 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
519 req->offset = offset; 1372 req->offset = offset;
520 req->length = length; 1373 req->length = length;
521 req->callback = SvREFCNT_inc (callback);
522 1374
523 send_req (req); 1375 REQ_SEND;
524} 1376}
525 1377
526void 1378void
527aio_stat(fh_or_path,callback=&PL_sv_undef) 1379aio_stat (fh_or_path,callback=&PL_sv_undef)
528 SV * fh_or_path 1380 SV * fh_or_path
529 SV * callback 1381 SV * callback
530 ALIAS: 1382 ALIAS:
531 aio_stat = REQ_STAT 1383 aio_stat = REQ_STAT
532 aio_lstat = REQ_LSTAT 1384 aio_lstat = REQ_LSTAT
533 CODE: 1385 PPCODE:
534{ 1386{
535 aio_req req; 1387 dREQ;
536
537 Newz (0, req, 1, aio_cb);
538
539 if (!req)
540 croak ("out of memory during aio_req allocation");
541 1388
542 New (0, req->statdata, 1, Stat_t); 1389 New (0, req->statdata, 1, Stat_t);
543
544 if (!req->statdata) 1390 if (!req->statdata)
1391 {
1392 req_free (req);
545 croak ("out of memory during aio_req->statdata allocation"); 1393 croak ("out of memory during aio_req->statdata allocation");
1394 }
546 1395
547 if (SvPOK (fh_or_path)) 1396 if (SvPOK (fh_or_path))
548 { 1397 {
549 req->type = ix; 1398 req->type = ix;
550 req->data = newSVsv (fh_or_path); 1399 req->data = newSVsv (fh_or_path);
551 req->dataptr = SvPV_nolen (req->data); 1400 req->dataptr = SvPVbyte_nolen (req->data);
552 } 1401 }
553 else 1402 else
554 { 1403 {
555 req->type = REQ_FSTAT; 1404 req->type = REQ_FSTAT;
1405 req->fh = newSVsv (fh_or_path);
556 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1406 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
557 } 1407 }
558 1408
559 req->callback = SvREFCNT_inc (callback); 1409 REQ_SEND;
560
561 send_req (req);
562} 1410}
563 1411
564void 1412void
565aio_unlink(pathname,callback=&PL_sv_undef) 1413aio_unlink (pathname,callback=&PL_sv_undef)
566 SV * pathname 1414 SV * pathname
567 SV * callback 1415 SV * callback
1416 ALIAS:
1417 aio_unlink = REQ_UNLINK
1418 aio_rmdir = REQ_RMDIR
1419 aio_readdir = REQ_READDIR
1420 PPCODE:
1421{
1422 dREQ;
1423
1424 req->type = ix;
1425 req->data = newSVsv (pathname);
1426 req->dataptr = SvPVbyte_nolen (req->data);
1427
1428 REQ_SEND;
1429}
1430
1431void
1432aio_link (oldpath,newpath,callback=&PL_sv_undef)
1433 SV * oldpath
1434 SV * newpath
1435 SV * callback
1436 ALIAS:
1437 aio_link = REQ_LINK
1438 aio_symlink = REQ_SYMLINK
1439 aio_rename = REQ_RENAME
1440 PPCODE:
1441{
1442 dREQ;
1443
1444 req->type = ix;
1445 req->fh = newSVsv (oldpath);
1446 req->data2ptr = SvPVbyte_nolen (req->fh);
1447 req->data = newSVsv (newpath);
1448 req->dataptr = SvPVbyte_nolen (req->data);
1449
1450 REQ_SEND;
1451}
1452
1453void
1454aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1455 SV * pathname
1456 SV * callback
1457 UV mode
1458 UV dev
1459 PPCODE:
1460{
1461 dREQ;
1462
1463 req->type = REQ_MKNOD;
1464 req->data = newSVsv (pathname);
1465 req->dataptr = SvPVbyte_nolen (req->data);
1466 req->mode = (mode_t)mode;
1467 req->offset = dev;
1468
1469 REQ_SEND;
1470}
1471
1472void
1473aio_busy (delay,callback=&PL_sv_undef)
1474 double delay
1475 SV * callback
1476 PPCODE:
1477{
1478 dREQ;
1479
1480 req->type = REQ_BUSY;
1481 req->fd = delay < 0. ? 0 : delay;
1482 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1483
1484 REQ_SEND;
1485}
1486
1487void
1488aio_group (callback=&PL_sv_undef)
1489 SV * callback
1490 PROTOTYPE: ;$
1491 PPCODE:
1492{
1493 dREQ;
1494
1495 req->type = REQ_GROUP;
1496 req_send (req);
1497
1498 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1499}
1500
1501void
1502aio_nop (callback=&PL_sv_undef)
1503 SV * callback
1504 PPCODE:
1505{
1506 dREQ;
1507
1508 req->type = REQ_NOP;
1509
1510 REQ_SEND;
1511}
1512
1513int
1514aioreq_pri (int pri = 0)
1515 PROTOTYPE: ;$
568 CODE: 1516 CODE:
569{ 1517 RETVAL = next_pri - PRI_BIAS;
570 aio_req req; 1518 if (items > 0)
571 1519 {
572 Newz (0, req, 1, aio_cb); 1520 if (pri < PRI_MIN) pri = PRI_MIN;
573 1521 if (pri > PRI_MAX) pri = PRI_MAX;
574 if (!req) 1522 next_pri = pri + PRI_BIAS;
575 croak ("out of memory during aio_req allocation"); 1523 }
576 1524 OUTPUT:
577 req->type = REQ_UNLINK; 1525 RETVAL
578 req->data = newSVsv (pathname);
579 req->dataptr = SvPV_nolen (req->data);
580 req->callback = SvREFCNT_inc (callback);
581
582 send_req (req);
583}
584 1526
585void 1527void
1528aioreq_nice (int nice = 0)
1529 CODE:
1530 nice = next_pri - nice;
1531 if (nice < PRI_MIN) nice = PRI_MIN;
1532 if (nice > PRI_MAX) nice = PRI_MAX;
1533 next_pri = nice + PRI_BIAS;
1534
1535void
586flush() 1536flush ()
587 PROTOTYPE: 1537 PROTOTYPE:
588 CODE: 1538 CODE:
589 while (nreqs) 1539 while (nreqs)
590 { 1540 {
591 poll_wait (); 1541 poll_wait ();
592 poll_cb (); 1542 poll_cb (0);
593 } 1543 }
594 1544
595void 1545void
596poll() 1546poll()
597 PROTOTYPE: 1547 PROTOTYPE:
598 CODE: 1548 CODE:
599 if (nreqs) 1549 if (nreqs)
600 { 1550 {
601 poll_wait (); 1551 poll_wait ();
602 poll_cb (); 1552 poll_cb (0);
603 } 1553 }
604 1554
605int 1555int
606poll_fileno() 1556poll_fileno()
607 PROTOTYPE: 1557 PROTOTYPE:
… …
612 1562
613int 1563int
614poll_cb(...) 1564poll_cb(...)
615 PROTOTYPE: 1565 PROTOTYPE:
616 CODE: 1566 CODE:
617 RETVAL = poll_cb (); 1567 RETVAL = poll_cb (0);
1568 OUTPUT:
1569 RETVAL
1570
1571int
1572poll_some(int max = 0)
1573 PROTOTYPE: $
1574 CODE:
1575 RETVAL = poll_cb (max);
618 OUTPUT: 1576 OUTPUT:
619 RETVAL 1577 RETVAL
620 1578
621void 1579void
622poll_wait() 1580poll_wait()
… …
631 CODE: 1589 CODE:
632 RETVAL = nreqs; 1590 RETVAL = nreqs;
633 OUTPUT: 1591 OUTPUT:
634 RETVAL 1592 RETVAL
635 1593
1594int
1595nready()
1596 PROTOTYPE:
1597 CODE:
1598 RETVAL = get_nready ();
1599 OUTPUT:
1600 RETVAL
1601
1602int
1603npending()
1604 PROTOTYPE:
1605 CODE:
1606 RETVAL = get_npending ();
1607 OUTPUT:
1608 RETVAL
1609
1610PROTOTYPES: DISABLE
1611
1612MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1613
1614void
1615cancel (aio_req_ornot req)
1616 CODE:
1617 req_cancel (req);
1618
1619void
1620cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1621 CODE:
1622 SvREFCNT_dec (req->callback);
1623 req->callback = newSVsv (callback);
1624
1625MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1626
1627void
1628add (aio_req grp, ...)
1629 PPCODE:
1630{
1631 int i;
1632 aio_req req;
1633
1634 if (grp->fd == 2)
1635 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1636
1637 for (i = 1; i < items; ++i )
1638 {
1639 if (GIMME_V != G_VOID)
1640 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1641
1642 req = SvAIO_REQ (ST (i));
1643
1644 if (req)
1645 {
1646 ++grp->length;
1647 req->grp = grp;
1648
1649 req->grp_prev = 0;
1650 req->grp_next = grp->grp_first;
1651
1652 if (grp->grp_first)
1653 grp->grp_first->grp_prev = req;
1654
1655 grp->grp_first = req;
1656 }
1657 }
1658}
1659
1660void
1661cancel_subs (aio_req_ornot req)
1662 CODE:
1663 req_cancel_subs (req);
1664
1665void
1666result (aio_req grp, ...)
1667 CODE:
1668{
1669 int i;
1670 AV *av;
1671
1672 grp->errorno = errno;
1673
1674 av = newAV ();
1675
1676 for (i = 1; i < items; ++i )
1677 av_push (av, newSVsv (ST (i)));
1678
1679 SvREFCNT_dec (grp->data);
1680 grp->data = (SV *)av;
1681}
1682
1683void
1684errno (aio_req grp, int errorno = errno)
1685 CODE:
1686 grp->errorno = errorno;
1687
1688void
1689limit (aio_req grp, int limit)
1690 CODE:
1691 grp->fd2 = limit;
1692 aio_grp_feed (grp);
1693
1694void
1695feed (aio_req grp, SV *callback=&PL_sv_undef)
1696 CODE:
1697{
1698 SvREFCNT_dec (grp->fh2);
1699 grp->fh2 = newSVsv (callback);
1700
1701 if (grp->fd2 <= 0)
1702 grp->fd2 = 2;
1703
1704 aio_grp_feed (grp);
1705}
1706

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