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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.2 by root, Sun Jul 10 18:16:49 2005 UTC vs.
Revision 1.92 by root, Wed Nov 8 01:59:59 2006 UTC

1#define PERL_NO_GET_CONTEXT 1/* solaris */
2#define _POSIX_PTHREAD_SEMANTICS 1
3
4#if __linux && !defined(_GNU_SOURCE)
5# define _GNU_SOURCE
6#endif
7
8/* just in case */
9#define _REENTRANT 1
10
11#include <errno.h>
2 12
3#include "EXTERN.h" 13#include "EXTERN.h"
4#include "perl.h" 14#include "perl.h"
5#include "XSUB.h" 15#include "XSUB.h"
6 16
17#include "autoconf/config.h"
18
19#include <pthread.h>
20
21#include <stddef.h>
22#include <errno.h>
23#include <sys/time.h>
24#include <sys/select.h>
7#include <sys/types.h> 25#include <sys/types.h>
8#include <sys/stat.h> 26#include <sys/stat.h>
27#include <limits.h>
9#include <unistd.h> 28#include <unistd.h>
10#include <fcntl.h> 29#include <fcntl.h>
11#include <signal.h> 30#include <signal.h>
12#include <sched.h> 31#include <sched.h>
13#include <endian.h>
14 32
15#include <pthread.h> 33#if HAVE_SENDFILE
34# if __linux
35# include <sys/sendfile.h>
36# elif __freebsd
16#include <sys/syscall.h> 37# include <sys/socket.h>
38# include <sys/uio.h>
39# elif __hpux
40# include <sys/socket.h>
41# elif __solaris /* not yet */
42# include <sys/sendfile.h>
43# else
44# error sendfile support requested but not available
45# endif
46#endif
17 47
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 48/* number of seconds after which idle threads exit */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49#define IDLE_TIMEOUT 10
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
21 50
22#if __i386 || __amd64 51/* used for struct dirent, AIX doesn't provide it */
23# define STACKSIZE ( 256 * sizeof (long)) 52#ifndef NAME_MAX
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
60
24#elif __ia64 61#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 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 ( 512 * sizeof (long)) 66# define STACKSIZE 16384
28#endif 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 WORDACCESS_UNSAFE
74# if __i386 || __x86_64
75# define WORDACCESS_UNSAFE 0
76# else
77# define WORDACCESS_UNSAFE 1
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;
91
92typedef SV SV8; /* byte-sv, used for argument-checking */
29 93
30enum { 94enum {
31 REQ_QUIT, 95 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 96 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 97 REQ_READ, REQ_WRITE, REQ_READAHEAD,
98 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 99 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 100 REQ_FSYNC, REQ_FDATASYNC,
101 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
102 REQ_MKNOD, REQ_READDIR,
103 REQ_LINK, REQ_SYMLINK, REQ_READLINK,
104 REQ_GROUP, REQ_NOP,
105 REQ_BUSY,
36}; 106};
37 107
108#define AIO_REQ_KLASS "IO::AIO::REQ"
109#define AIO_GRP_KLASS "IO::AIO::GRP"
110
38typedef struct aio_cb { 111typedef struct aio_cb
112{
39 struct aio_cb *next; 113 struct aio_cb *volatile next;
40 114
115 SV *callback, *fh;
116 SV *sv1, *sv2;
117 void *ptr1, *ptr2;
118 off_t offs;
119 size_t size;
120 ssize_t result;
121
122 STRLEN stroffset;
41 int type; 123 int type;
42 124 int int1, int2;
43 int fd; 125 int errorno;
44 off_t offset;
45 size_t length;
46 ssize_t result;
47 mode_t mode; /* open */ 126 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 127
53 Stat_t *statdata; 128 unsigned char flags;
129 unsigned char pri;
130
131 SV *self; /* the perl counterpart of this request, if any */
132 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 133} aio_cb;
55 134
135enum {
136 FLAG_CANCELLED = 0x01, /* request was cancelled */
137 FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
138 FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
139};
140
56typedef aio_cb *aio_req; 141typedef aio_cb *aio_req;
142typedef aio_cb *aio_req_ornot;
57 143
58static int started; 144enum {
59static int nreqs; 145 PRI_MIN = -4,
146 PRI_MAX = 4,
147
148 DEFAULT_PRI = 0,
149 PRI_BIAS = -PRI_MIN,
150 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
151};
152
153#define AIO_TICKS ((1000000 + 1023) >> 10)
154
155static unsigned int max_poll_time = 0;
156static unsigned int max_poll_reqs = 0;
157
158/* calculcate time difference in ~1/AIO_TICKS of a second */
159static int tvdiff (struct timeval *tv1, struct timeval *tv2)
160{
161 return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
162 + ((tv2->tv_usec - tv1->tv_usec) >> 10);
163}
164
165static int next_pri = DEFAULT_PRI + PRI_BIAS;
166
167static unsigned int started, idle, wanted;
168
169#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
170# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
171#else
172# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
173#endif
174
175#define LOCK(mutex) pthread_mutex_lock (&(mutex))
176#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
177
178/* worker threads management */
179static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
180
181typedef struct worker {
182 /* locked by wrklock */
183 struct worker *prev, *next;
184
185 pthread_t tid;
186
187 /* locked by reslock, reqlock or wrklock */
188 aio_req req; /* currently processed request */
189 void *dbuf;
190 DIR *dirp;
191} worker;
192
193static worker wrk_first = { &wrk_first, &wrk_first, 0 };
194
195static void worker_clear (worker *wrk)
196{
197 if (wrk->dirp)
198 {
199 closedir (wrk->dirp);
200 wrk->dirp = 0;
201 }
202
203 if (wrk->dbuf)
204 {
205 free (wrk->dbuf);
206 wrk->dbuf = 0;
207 }
208}
209
210static void worker_free (worker *wrk)
211{
212 wrk->next->prev = wrk->prev;
213 wrk->prev->next = wrk->next;
214
215 free (wrk);
216}
217
218static volatile unsigned int nreqs, nready, npending;
219static volatile unsigned int max_idle = 4;
220static volatile unsigned int max_outstanding = 0xffffffff;
60static int reqpipe[2], respipe[2]; 221static int respipe [2];
61 222
62static aio_req qs, qe; /* queue start, queue end */ 223static pthread_mutex_t reslock = AIO_MUTEX_INIT;
224static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
225static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
226
227#if WORDACCESS_UNSAFE
228
229static unsigned int get_nready ()
230{
231 unsigned int retval;
232
233 LOCK (reqlock);
234 retval = nready;
235 UNLOCK (reqlock);
236
237 return retval;
238}
239
240static unsigned int get_npending ()
241{
242 unsigned int retval;
243
244 LOCK (reslock);
245 retval = npending;
246 UNLOCK (reslock);
247
248 return retval;
249}
250
251static unsigned int get_nthreads ()
252{
253 unsigned int retval;
254
255 LOCK (wrklock);
256 retval = started;
257 UNLOCK (wrklock);
258
259 return retval;
260}
261
262#else
263
264# define get_nready() nready
265# define get_npending() npending
266# define get_nthreads() started
267
268#endif
269
270/*
271 * a somewhat faster data structure might be nice, but
272 * with 8 priorities this actually needs <20 insns
273 * per shift, the most expensive operation.
274 */
275typedef struct {
276 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
277 int size;
278} reqq;
279
280static reqq req_queue;
281static reqq res_queue;
282
283int reqq_push (reqq *q, aio_req req)
284{
285 int pri = req->pri;
286 req->next = 0;
287
288 if (q->qe[pri])
289 {
290 q->qe[pri]->next = req;
291 q->qe[pri] = req;
292 }
293 else
294 q->qe[pri] = q->qs[pri] = req;
295
296 return q->size++;
297}
298
299aio_req reqq_shift (reqq *q)
300{
301 int pri;
302
303 if (!q->size)
304 return 0;
305
306 --q->size;
307
308 for (pri = NUM_PRI; pri--; )
309 {
310 aio_req req = q->qs[pri];
311
312 if (req)
313 {
314 if (!(q->qs[pri] = req->next))
315 q->qe[pri] = 0;
316
317 return req;
318 }
319 }
320
321 abort ();
322}
323
324static int poll_cb ();
325static void req_invoke (aio_req req);
326static void req_free (aio_req req);
327static void req_cancel (aio_req req);
328
329/* must be called at most once */
330static SV *req_sv (aio_req req, const char *klass)
331{
332 if (!req->self)
333 {
334 req->self = (SV *)newHV ();
335 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
336 }
337
338 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
339}
340
341static aio_req SvAIO_REQ (SV *sv)
342{
343 MAGIC *mg;
344
345 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
346 croak ("object of class " AIO_REQ_KLASS " expected");
347
348 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
349
350 return mg ? (aio_req)mg->mg_ptr : 0;
351}
352
353static void aio_grp_feed (aio_req grp)
354{
355 while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
356 {
357 int old_len = grp->size;
358
359 if (grp->sv2 && SvOK (grp->sv2))
360 {
361 dSP;
362
363 ENTER;
364 SAVETMPS;
365 PUSHMARK (SP);
366 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
367 PUTBACK;
368 call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
369 SPAGAIN;
370 FREETMPS;
371 LEAVE;
372 }
373
374 /* stop if no progress has been made */
375 if (old_len == grp->size)
376 {
377 SvREFCNT_dec (grp->sv2);
378 grp->sv2 = 0;
379 break;
380 }
381 }
382}
383
384static void aio_grp_dec (aio_req grp)
385{
386 --grp->size;
387
388 /* call feeder, if applicable */
389 aio_grp_feed (grp);
390
391 /* finish, if done */
392 if (!grp->size && grp->int1)
393 {
394 req_invoke (grp);
395 req_free (grp);
396 }
397}
398
399static void req_invoke (aio_req req)
400{
401 dSP;
402
403 if (req->flags & FLAG_SV1_RO_OFF)
404 SvREADONLY_off (req->sv1);
405
406 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
407 {
408 ENTER;
409 SAVETMPS;
410 PUSHMARK (SP);
411 EXTEND (SP, 1);
412
413 switch (req->type)
414 {
415 case REQ_READDIR:
416 {
417 SV *rv = &PL_sv_undef;
418
419 if (req->result >= 0)
420 {
421 int i;
422 char *buf = req->ptr2;
423 AV *av = newAV ();
424
425 av_extend (av, req->result - 1);
426
427 for (i = 0; i < req->result; ++i)
428 {
429 SV *sv = newSVpv (buf, 0);
430
431 av_store (av, i, sv);
432 buf += SvCUR (sv) + 1;
433 }
434
435 rv = sv_2mortal (newRV_noinc ((SV *)av));
436 }
437
438 PUSHs (rv);
439 }
440 break;
441
442 case REQ_OPEN:
443 {
444 /* convert fd to fh */
445 SV *fh;
446
447 PUSHs (sv_2mortal (newSViv (req->result)));
448 PUTBACK;
449 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
450 SPAGAIN;
451
452 fh = SvREFCNT_inc (POPs);
453
454 PUSHMARK (SP);
455 XPUSHs (sv_2mortal (fh));
456 }
457 break;
458
459 case REQ_GROUP:
460 req->int1 = 2; /* mark group as finished */
461
462 if (req->sv1)
463 {
464 int i;
465 AV *av = (AV *)req->sv1;
466
467 EXTEND (SP, AvFILL (av) + 1);
468 for (i = 0; i <= AvFILL (av); ++i)
469 PUSHs (*av_fetch (av, i, 0));
470 }
471 break;
472
473 case REQ_NOP:
474 case REQ_BUSY:
475 break;
476
477 case REQ_READLINK:
478 if (req->result > 0)
479 {
480 SvCUR_set (req->sv1, req->result);
481 *SvEND (req->sv1) = 0;
482 PUSHs (req->sv1);
483 }
484 break;
485
486 case REQ_STAT:
487 case REQ_LSTAT:
488 case REQ_FSTAT:
489 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
490 PL_laststatval = req->result;
491 PL_statcache = *(Stat_t *)(req->ptr2);
492 PUSHs (sv_2mortal (newSViv (req->result)));
493 break;
494
495 case REQ_READ:
496 SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
497 *SvEND (req->sv1) = 0;
498 PUSHs (sv_2mortal (newSViv (req->result)));
499 break;
500
501 default:
502 PUSHs (sv_2mortal (newSViv (req->result)));
503 break;
504 }
505
506 errno = req->errorno;
507
508 PUTBACK;
509 call_sv (req->callback, G_VOID | G_EVAL);
510 SPAGAIN;
511
512 FREETMPS;
513 LEAVE;
514 }
515
516 if (req->grp)
517 {
518 aio_req grp = req->grp;
519
520 /* unlink request */
521 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
522 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
523
524 if (grp->grp_first == req)
525 grp->grp_first = req->grp_next;
526
527 aio_grp_dec (grp);
528 }
529
530 if (SvTRUE (ERRSV))
531 {
532 req_free (req);
533 croak (0);
534 }
535}
536
537static void req_free (aio_req req)
538{
539 if (req->self)
540 {
541 sv_unmagic (req->self, PERL_MAGIC_ext);
542 SvREFCNT_dec (req->self);
543 }
544
545 SvREFCNT_dec (req->fh);
546 SvREFCNT_dec (req->sv1);
547 SvREFCNT_dec (req->sv2);
548 SvREFCNT_dec (req->callback);
549
550 if (req->flags & FLAG_PTR2_FREE)
551 free (req->ptr2);
552
553 Safefree (req);
554}
555
556static void req_cancel_subs (aio_req grp)
557{
558 aio_req sub;
559
560 if (grp->type != REQ_GROUP)
561 return;
562
563 SvREFCNT_dec (grp->sv2);
564 grp->sv2 = 0;
565
566 for (sub = grp->grp_first; sub; sub = sub->grp_next)
567 req_cancel (sub);
568}
569
570static void req_cancel (aio_req req)
571{
572 req->flags |= FLAG_CANCELLED;
573
574 req_cancel_subs (req);
575}
63 576
64static void *aio_proc(void *arg); 577static void *aio_proc(void *arg);
65 578
66static void
67start_thread (void) 579static void start_thread (void)
68{ 580{
69 sigset_t fullsigset, oldsigset; 581 sigset_t fullsigset, oldsigset;
70 pthread_t tid;
71 pthread_attr_t attr; 582 pthread_attr_t attr;
583
584 worker *wrk = calloc (1, sizeof (worker));
585
586 if (!wrk)
587 croak ("unable to allocate worker thread data");
72 588
73 pthread_attr_init (&attr); 589 pthread_attr_init (&attr);
74 pthread_attr_setstacksize (&attr, STACKSIZE); 590 pthread_attr_setstacksize (&attr, STACKSIZE);
75 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 591 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
592#ifdef PTHREAD_SCOPE_PROCESS
593 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
594#endif
76 595
77 sigfillset (&fullsigset); 596 sigfillset (&fullsigset);
597
598 LOCK (wrklock);
78 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 599 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79 600
80 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 601 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
81 started++;
82
83 sigprocmask (SIG_SETMASK, &oldsigset, 0);
84}
85
86static void
87send_reqs (void)
88{
89 /* this write is atomic */
90 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
91 {
92 qs = qs->next;
93 if (!qs) qe = 0;
94 }
95}
96
97static void
98send_req (aio_req req)
99{
100 nreqs++;
101 req->next = 0;
102
103 if (qe)
104 { 602 {
105 qe->next = req; 603 wrk->prev = &wrk_first;
106 qe = req; 604 wrk->next = wrk_first.next;
605 wrk_first.next->prev = wrk;
606 wrk_first.next = wrk;
607 ++started;
107 } 608 }
108 else 609 else
109 qe = qs = req; 610 free (wrk);
110 611
111 send_reqs (); 612 sigprocmask (SIG_SETMASK, &oldsigset, 0);
613 UNLOCK (wrklock);
112} 614}
113 615
114static void 616static void maybe_start_thread ()
115end_thread (void) 617{
618 if (get_nthreads () >= wanted)
619 return;
620
621 /* todo: maybe use idle here, but might be less exact */
622 if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
623 return;
624
625 start_thread ();
626}
627
628static void req_send (aio_req req)
629{
630 ++nreqs;
631
632 LOCK (reqlock);
633 ++nready;
634 reqq_push (&req_queue, req);
635 pthread_cond_signal (&reqwait);
636 UNLOCK (reqlock);
637
638 maybe_start_thread ();
639}
640
641static void end_thread (void)
116{ 642{
117 aio_req req; 643 aio_req req;
644
118 New (0, req, 1, aio_cb); 645 Newz (0, req, 1, aio_cb);
646
119 req->type = REQ_QUIT; 647 req->type = REQ_QUIT;
648 req->pri = PRI_MAX + PRI_BIAS;
120 649
121 send_req (req); 650 LOCK (reqlock);
122} 651 reqq_push (&req_queue, req);
652 pthread_cond_signal (&reqwait);
653 UNLOCK (reqlock);
123 654
124static void 655 LOCK (wrklock);
125read_write (pTHX_ 656 --started;
126 int dowrite, int fd, off_t offset, size_t length, 657 UNLOCK (wrklock);
127 SV *data, STRLEN dataoffset, SV *callback) 658}
659
660static void set_max_idle (int nthreads)
128{ 661{
662 if (WORDACCESS_UNSAFE) LOCK (reqlock);
663 max_idle = nthreads <= 0 ? 1 : nthreads;
664 if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
665}
666
667static void min_parallel (int nthreads)
668{
669 if (wanted < nthreads)
670 wanted = nthreads;
671}
672
673static void max_parallel (int nthreads)
674{
675 if (wanted > nthreads)
676 wanted = nthreads;
677
678 while (started > wanted)
679 end_thread ();
680}
681
682static void poll_wait ()
683{
684 fd_set rfd;
685
686 while (nreqs)
687 {
688 int size;
689 if (WORDACCESS_UNSAFE) LOCK (reslock);
690 size = res_queue.size;
691 if (WORDACCESS_UNSAFE) UNLOCK (reslock);
692
693 if (size)
694 return;
695
696 maybe_start_thread ();
697
698 FD_ZERO(&rfd);
699 FD_SET(respipe [0], &rfd);
700
701 select (respipe [0] + 1, &rfd, 0, 0, 0);
702 }
703}
704
705static int poll_cb ()
706{
707 dSP;
708 int count = 0;
709 int maxreqs = max_poll_reqs;
710 int do_croak = 0;
711 struct timeval tv_start, tv_now;
129 aio_req req; 712 aio_req req;
130 STRLEN svlen;
131 char *svptr = SvPV (data, svlen);
132 713
133 SvUPGRADE (data, SVt_PV); 714 if (max_poll_time)
134 SvPOK_on (data); 715 gettimeofday (&tv_start, 0);
135 716
136 if (dataoffset < 0) 717 for (;;)
137 dataoffset += svlen;
138
139 if (dataoffset < 0 || dataoffset > svlen)
140 croak ("data offset outside of string");
141
142 if (dowrite)
143 { 718 {
144 /* write: check length and adjust. */ 719 for (;;)
145 if (length < 0 || length + dataoffset > svlen) 720 {
146 length = svlen - dataoffset; 721 maybe_start_thread ();
722
723 LOCK (reslock);
724 req = reqq_shift (&res_queue);
725
726 if (req)
727 {
728 --npending;
729
730 if (!res_queue.size)
731 {
732 /* read any signals sent by the worker threads */
733 char buf [32];
734 while (read (respipe [0], buf, 32) == 32)
735 ;
736 }
737 }
738
739 UNLOCK (reslock);
740
741 if (!req)
742 break;
743
744 --nreqs;
745
746 if (req->type == REQ_GROUP && req->size)
747 {
748 req->int1 = 1; /* mark request as delayed */
749 continue;
750 }
751 else
752 {
753 req_invoke (req);
754
755 count++;
756 }
757
758 req_free (req);
759
760 if (maxreqs && !--maxreqs)
761 break;
762
763 if (max_poll_time)
764 {
765 gettimeofday (&tv_now, 0);
766
767 if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
768 break;
769 }
770 }
771
772 if (nreqs <= max_outstanding)
773 break;
774
775 poll_wait ();
776
777 ++maxreqs;
778 }
779
780 return count;
781}
782
783static void create_pipe ()
784{
785 if (pipe (respipe))
786 croak ("unable to initialize result pipe");
787
788 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
789 croak ("cannot set result pipe to nonblocking mode");
790
791 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
792 croak ("cannot set result pipe to nonblocking mode");
793}
794
795/*****************************************************************************/
796/* work around various missing functions */
797
798#if !HAVE_PREADWRITE
799# define pread aio_pread
800# define pwrite aio_pwrite
801
802/*
803 * make our pread/pwrite safe against themselves, but not against
804 * normal read/write by using a mutex. slows down execution a lot,
805 * but that's your problem, not mine.
806 */
807static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
808
809static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
810{
811 ssize_t res;
812 off_t ooffset;
813
814 LOCK (preadwritelock);
815 ooffset = lseek (fd, 0, SEEK_CUR);
816 lseek (fd, offset, SEEK_SET);
817 res = read (fd, buf, count);
818 lseek (fd, ooffset, SEEK_SET);
819 UNLOCK (preadwritelock);
820
821 return res;
822}
823
824static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
825{
826 ssize_t res;
827 off_t ooffset;
828
829 LOCK (preadwritelock);
830 ooffset = lseek (fd, 0, SEEK_CUR);
831 lseek (fd, offset, SEEK_SET);
832 res = write (fd, buf, count);
833 lseek (fd, offset, SEEK_SET);
834 UNLOCK (preadwritelock);
835
836 return res;
837}
838#endif
839
840#if !HAVE_FDATASYNC
841# define fdatasync fsync
842#endif
843
844#if !HAVE_READAHEAD
845# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
846
847static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
848{
849 dBUF;
850
851 while (count > 0)
852 {
853 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
854
855 pread (fd, aio_buf, len, offset);
856 offset += len;
857 count -= len;
858 }
859
860 errno = 0;
861}
862
863#endif
864
865#if !HAVE_READDIR_R
866# define readdir_r aio_readdir_r
867
868static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
869
870static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
871{
872 struct dirent *e;
873 int errorno;
874
875 LOCK (readdirlock);
876
877 e = readdir (dirp);
878 errorno = errno;
879
880 if (e)
881 {
882 *res = ent;
883 strcpy (ent->d_name, e->d_name);
147 } 884 }
148 else 885 else
886 *res = 0;
887
888 UNLOCK (readdirlock);
889
890 errno = errorno;
891 return e ? 0 : -1;
892}
893#endif
894
895/* sendfile always needs emulation */
896static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
897{
898 ssize_t res;
899
900 if (!count)
901 return 0;
902
903#if HAVE_SENDFILE
904# if __linux
905 res = sendfile (ofd, ifd, &offset, count);
906
907# elif __freebsd
908 /*
909 * Of course, the freebsd sendfile is a dire hack with no thoughts
910 * wasted on making it similar to other I/O functions.
911 */
912 {
913 off_t sbytes;
914 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
915
916 if (res < 0 && sbytes)
917 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
918 res = sbytes;
919 }
920
921# elif __hpux
922 res = sendfile (ofd, ifd, offset, count, 0, 0);
923
924# elif __solaris
925 {
926 struct sendfilevec vec;
927 size_t sbytes;
928
929 vec.sfv_fd = ifd;
930 vec.sfv_flag = 0;
931 vec.sfv_off = offset;
932 vec.sfv_len = count;
933
934 res = sendfilev (ofd, &vec, 1, &sbytes);
935
936 if (res < 0 && sbytes)
937 res = sbytes;
938 }
939
940# endif
941#else
942 res = -1;
943 errno = ENOSYS;
944#endif
945
946 if (res < 0
947 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
948#if __solaris
949 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
950#endif
951 )
952 )
149 { 953 {
150 /* read: grow scalar as necessary */ 954 /* emulate sendfile. this is a major pain in the ass */
151 svptr = SvGROW (data, length + dataoffset); 955 dBUF;
956
957 res = 0;
958
959 while (count)
960 {
961 ssize_t cnt;
962
963 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
964
965 if (cnt <= 0)
966 {
967 if (cnt && !res) res = -1;
968 break;
969 }
970
971 cnt = write (ofd, aio_buf, cnt);
972
973 if (cnt <= 0)
974 {
975 if (cnt && !res) res = -1;
976 break;
977 }
978
979 offset += cnt;
980 res += cnt;
981 count -= cnt;
982 }
152 } 983 }
153 984
154 if (length < 0) 985 return res;
155 croak ("length must not be negative");
156
157 Newz (0, req, 1, aio_cb);
158
159 if (!req)
160 croak ("out of memory during aio_req allocation");
161
162 req->type = dowrite ? REQ_WRITE : REQ_READ;
163 req->fd = fd;
164 req->offset = offset;
165 req->length = length;
166 req->data = SvREFCNT_inc (data);
167 req->dataptr = (char *)svptr + dataoffset;
168 req->callback = SvREFCNT_inc (callback);
169
170 send_req (req);
171} 986}
172 987
173static void 988/* read a full directory */
174poll_wait () 989static void scandir_ (aio_req req, worker *self)
175{ 990{
176 fd_set rfd; 991 DIR *dirp;
177 FD_ZERO(&rfd); 992 union
178 FD_SET(respipe[0], &rfd); 993 {
994 struct dirent d;
995 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
996 } *u;
997 struct dirent *entp;
998 char *name, *names;
999 int memlen = 4096;
1000 int memofs = 0;
1001 int res = 0;
1002 int errorno;
179 1003
180 select (respipe[0] + 1, &rfd, 0, 0, 0); 1004 LOCK (wrklock);
181} 1005 self->dirp = dirp = opendir (req->ptr1);
1006 self->dbuf = u = malloc (sizeof (*u));
1007 req->flags |= FLAG_PTR2_FREE;
1008 req->ptr2 = names = malloc (memlen);
1009 UNLOCK (wrklock);
182 1010
183static int 1011 if (dirp && u && names)
184poll_cb (pTHX) 1012 for (;;)
1013 {
1014 errno = 0;
1015 readdir_r (dirp, &u->d, &entp);
1016
1017 if (!entp)
1018 break;
1019
1020 name = entp->d_name;
1021
1022 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1023 {
1024 int len = strlen (name) + 1;
1025
1026 res++;
1027
1028 while (memofs + len > memlen)
1029 {
1030 memlen *= 2;
1031 LOCK (wrklock);
1032 req->ptr2 = names = realloc (names, memlen);
1033 UNLOCK (wrklock);
1034
1035 if (!names)
1036 break;
1037 }
1038
1039 memcpy (names + memofs, name, len);
1040 memofs += len;
1041 }
1042 }
1043
1044 if (errno)
1045 res = -1;
1046
1047 req->result = res;
1048}
1049
1050/*****************************************************************************/
1051
1052static void *aio_proc (void *thr_arg)
185{ 1053{
186 dSP;
187 int count = 0;
188 aio_req req; 1054 aio_req req;
1055 struct timespec ts;
1056 worker *self = (worker *)thr_arg;
189 1057
190 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 1058 /* try to distribute timeouts somewhat evenly */
1059 ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1060 * (1000000000UL / 1024UL);
1061
1062 for (;;)
191 { 1063 {
192 nreqs--; 1064 ts.tv_sec = time (0) + IDLE_TIMEOUT;
193 1065
194 if (req->type == REQ_QUIT) 1066 LOCK (reqlock);
195 started--; 1067
196 else 1068 for (;;)
197 { 1069 {
198 int errorno = errno; 1070 self->req = req = reqq_shift (&req_queue);
199 errno = req->errorno;
200 1071
201 if (req->type == REQ_READ)
202 SvCUR_set (req->data, req->dataoffset
203 + req->result > 0 ? req->result : 0);
204
205 if (req->data) 1072 if (req)
206 SvREFCNT_dec (req->data); 1073 break;
207 1074
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) 1075 ++idle;
1076
1077 if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1078 == ETIMEDOUT)
209 { 1079 {
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 1080 if (idle > max_idle)
211 PL_laststatval = req->result; 1081 {
212 PL_statcache = *(req->statdata); 1082 --idle;
1083 UNLOCK (reqlock);
1084 LOCK (wrklock);
1085 --started;
1086 UNLOCK (wrklock);
1087 goto quit;
1088 }
213 1089
214 Safefree (req->statdata); 1090 /* we are allowed to idle, so do so without any timeout */
1091 pthread_cond_wait (&reqwait, &reqlock);
1092 ts.tv_sec = time (0) + IDLE_TIMEOUT;
215 } 1093 }
216 1094
217 PUSHMARK (SP); 1095 --idle;
218 XPUSHs (sv_2mortal (newSViv (req->result)));
219
220 if (req->type == REQ_OPEN)
221 {
222 /* convert fd to fh */
223 SV *fh;
224
225 PUTBACK;
226 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
227 SPAGAIN;
228
229 fh = POPs;
230
231 PUSHMARK (SP);
232 XPUSHs (fh);
233 }
234
235 PUTBACK;
236 call_sv (req->callback, G_VOID | G_EVAL);
237 SPAGAIN;
238
239 if (req->callback)
240 SvREFCNT_dec (req->callback);
241
242 errno = errorno;
243 count++;
244 } 1096 }
245 1097
246 Safefree (req); 1098 --nready;
1099
1100 UNLOCK (reqlock);
1101
1102 errno = 0; /* strictly unnecessary */
1103
1104 if (!(req->flags & FLAG_CANCELLED))
1105 switch (req->type)
1106 {
1107 case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1108 case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1109
1110 case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1111 case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1112
1113 case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1114 case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1115 case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1116
1117 case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1118 case REQ_CLOSE: req->result = close (req->int1); break;
1119 case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1120 case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1121 case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1122 case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1123 case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1124 case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1125 case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1126
1127 case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1128 case REQ_FSYNC: req->result = fsync (req->int1); break;
1129 case REQ_READDIR: scandir_ (req, self); break;
1130
1131 case REQ_BUSY:
1132 {
1133 struct timeval tv;
1134
1135 tv.tv_sec = req->int1;
1136 tv.tv_usec = req->int2;
1137
1138 req->result = select (0, 0, 0, 0, &tv);
1139 }
1140
1141 case REQ_GROUP:
1142 case REQ_NOP:
1143 break;
1144
1145 case REQ_QUIT:
1146 goto quit;
1147
1148 default:
1149 req->result = ENOSYS;
1150 break;
1151 }
1152
1153 req->errorno = errno;
1154
1155 LOCK (reslock);
1156
1157 ++npending;
1158
1159 if (!reqq_push (&res_queue, req))
1160 /* write a dummy byte to the pipe so fh becomes ready */
1161 write (respipe [1], &respipe, 1);
1162
1163 self->req = 0;
1164 worker_clear (self);
1165
1166 UNLOCK (reslock);
247 } 1167 }
248 1168
249 if (qs) 1169quit:
250 send_reqs (); 1170 LOCK (wrklock);
1171 worker_free (self);
1172 UNLOCK (wrklock);
251 1173
252 return count; 1174 return 0;
253} 1175}
254 1176
255static void * 1177/*****************************************************************************/
256aio_proc (void *thr_arg) 1178
1179static void atfork_prepare (void)
257{ 1180{
1181 LOCK (wrklock);
1182 LOCK (reqlock);
1183 LOCK (reslock);
1184#if !HAVE_PREADWRITE
1185 LOCK (preadwritelock);
1186#endif
1187#if !HAVE_READDIR_R
1188 LOCK (readdirlock);
1189#endif
1190}
1191
1192static void atfork_parent (void)
1193{
1194#if !HAVE_READDIR_R
1195 UNLOCK (readdirlock);
1196#endif
1197#if !HAVE_PREADWRITE
1198 UNLOCK (preadwritelock);
1199#endif
1200 UNLOCK (reslock);
1201 UNLOCK (reqlock);
1202 UNLOCK (wrklock);
1203}
1204
1205static void atfork_child (void)
1206{
258 aio_req req; 1207 aio_req prv;
259 1208
260 /* then loop */ 1209 while (prv = reqq_shift (&req_queue))
261 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 1210 req_free (prv);
1211
1212 while (prv = reqq_shift (&res_queue))
1213 req_free (prv);
1214
1215 while (wrk_first.next != &wrk_first)
262 { 1216 {
263 errno = 0; /* strictly unnecessary */ 1217 worker *wrk = wrk_first.next;
264 1218
265 switch (req->type) 1219 if (wrk->req)
266 { 1220 req_free (wrk->req);
267 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
268 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
269#if SYS_readahead
270 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
271#else
272 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
273#endif
274 1221
275 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 1222 worker_clear (wrk);
276 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 1223 worker_free (wrk);
277 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
278
279 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
280 case REQ_CLOSE: req->result = close (req->fd); break;
281 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
282
283 case REQ_FSYNC: req->result = fsync (req->fd); break;
284 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
285
286 case REQ_QUIT:
287 write (respipe[1], (void *)&req, sizeof (req));
288 return 0;
289
290 default:
291 req->result = ENOSYS;
292 break;
293 }
294
295 req->errorno = errno;
296 write (respipe[1], (void *)&req, sizeof (req));
297 } 1224 }
298 1225
299 return 0; 1226 started = 0;
300} 1227 idle = 0;
1228 nreqs = 0;
1229 nready = 0;
1230 npending = 0;
301 1231
1232 close (respipe [0]);
1233 close (respipe [1]);
1234 create_pipe ();
1235
1236 atfork_parent ();
1237}
1238
1239#define dREQ \
1240 aio_req req; \
1241 int req_pri = next_pri; \
1242 next_pri = DEFAULT_PRI + PRI_BIAS; \
1243 \
1244 if (SvOK (callback) && !SvROK (callback)) \
1245 croak ("callback must be undef or of reference type"); \
1246 \
1247 Newz (0, req, 1, aio_cb); \
1248 if (!req) \
1249 croak ("out of memory during aio_req allocation"); \
1250 \
1251 req->callback = newSVsv (callback); \
1252 req->pri = req_pri
1253
1254#define REQ_SEND \
1255 req_send (req); \
1256 \
1257 if (GIMME_V != G_VOID) \
1258 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1259
302MODULE = IO::AIO PACKAGE = IO::AIO 1260MODULE = IO::AIO PACKAGE = IO::AIO
303 1261
1262PROTOTYPES: ENABLE
1263
304BOOT: 1264BOOT:
305{ 1265{
306 if (pipe (reqpipe) || pipe (respipe)) 1266 HV *stash = gv_stashpv ("IO::AIO", 1);
307 croak ("unable to initialize request or result pipe");
308 1267
309 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) 1268 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
310 croak ("cannot set result pipe to nonblocking mode"); 1269 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1270 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1271 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1272 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1273 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
311 1274
312 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) 1275 create_pipe ();
313 croak ("cannot set result pipe to nonblocking mode"); 1276 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
314} 1277}
315 1278
316void 1279void
317min_parallel(nthreads) 1280max_poll_reqs (int nreqs)
318 int nthreads
319 PROTOTYPE: $ 1281 PROTOTYPE: $
320 CODE: 1282 CODE:
321 while (nthreads > started) 1283 max_poll_reqs = nreqs;
322 start_thread ();
323 1284
324void 1285void
325max_parallel(nthreads) 1286max_poll_time (double nseconds)
326 int nthreads
327 PROTOTYPE: $ 1287 PROTOTYPE: $
328 CODE: 1288 CODE:
329{ 1289 max_poll_time = nseconds * AIO_TICKS;
330 int cur = started;
331 while (cur > nthreads)
332 {
333 end_thread ();
334 cur--;
335 }
336 1290
337 while (started > nthreads)
338 {
339 poll_wait ();
340 poll_cb (aTHX);
341 }
342}
343
344void 1291void
1292min_parallel (int nthreads)
1293 PROTOTYPE: $
1294
1295void
1296max_parallel (int nthreads)
1297 PROTOTYPE: $
1298
1299void
1300max_idle (int nthreads)
1301 PROTOTYPE: $
1302 CODE:
1303 set_max_idle (nthreads);
1304
1305int
1306max_outstanding (int maxreqs)
1307 PROTOTYPE: $
1308 CODE:
1309 RETVAL = max_outstanding;
1310 max_outstanding = maxreqs;
1311 OUTPUT:
1312 RETVAL
1313
1314void
345aio_open(pathname,flags,mode,callback) 1315aio_open (pathname,flags,mode,callback=&PL_sv_undef)
346 SV * pathname 1316 SV8 * pathname
347 int flags 1317 int flags
348 int mode 1318 int mode
349 SV * callback 1319 SV * callback
350 PROTOTYPE: $$$$ 1320 PROTOTYPE: $$$;$
351 CODE: 1321 PPCODE:
352{ 1322{
353 aio_req req; 1323 dREQ;
354
355 Newz (0, req, 1, aio_cb);
356
357 if (!req)
358 croak ("out of memory during aio_req allocation");
359 1324
360 req->type = REQ_OPEN; 1325 req->type = REQ_OPEN;
361 req->data = newSVsv (pathname); 1326 req->sv1 = newSVsv (pathname);
362 req->dataptr = SvPV_nolen (req->data); 1327 req->ptr1 = SvPVbyte_nolen (req->sv1);
363 req->fd = flags; 1328 req->int1 = flags;
364 req->mode = mode; 1329 req->mode = mode;
365 req->callback = SvREFCNT_inc (callback);
366 1330
367 send_req (req); 1331 REQ_SEND;
368} 1332}
369 1333
370void 1334void
371aio_close(fh,callback) 1335aio_close (fh,callback=&PL_sv_undef)
372 InputStream fh 1336 SV * fh
373 SV * callback 1337 SV * callback
374 PROTOTYPE: $$ 1338 PROTOTYPE: $;$
375 ALIAS: 1339 ALIAS:
376 aio_close = REQ_CLOSE 1340 aio_close = REQ_CLOSE
377 aio_fsync = REQ_FSYNC 1341 aio_fsync = REQ_FSYNC
378 aio_fdatasync = REQ_FDATASYNC 1342 aio_fdatasync = REQ_FDATASYNC
379 CODE: 1343 PPCODE:
380{ 1344{
381 aio_req req; 1345 dREQ;
382
383 Newz (0, req, 1, aio_cb);
384
385 if (!req)
386 croak ("out of memory during aio_req allocation");
387 1346
388 req->type = ix; 1347 req->type = ix;
1348 req->fh = newSVsv (fh);
389 req->fd = PerlIO_fileno (fh); 1349 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
390 req->callback = SvREFCNT_inc (callback);
391 1350
392 send_req (req); 1351 REQ_SEND (req);
393} 1352}
394 1353
395void 1354void
396aio_read(fh,offset,length,data,dataoffset,callback) 1355aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
397 InputStream fh 1356 SV * fh
398 UV offset 1357 UV offset
399 IV length 1358 UV length
400 SV * data 1359 SV8 * data
401 IV dataoffset 1360 UV dataoffset
402 SV * callback 1361 SV * callback
1362 ALIAS:
1363 aio_read = REQ_READ
1364 aio_write = REQ_WRITE
403 PROTOTYPE: $$$$$$ 1365 PROTOTYPE: $$$$$;$
404 CODE: 1366 PPCODE:
405 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407void
408aio_write(fh,offset,length,data,dataoffset,callback)
409 OutputStream fh
410 UV offset
411 IV length
412 SV * data
413 IV dataoffset
414 SV * callback
415 PROTOTYPE: $$$$$$
416 CODE:
417 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
418
419void
420aio_readahead(fh,offset,length,callback)
421 InputStream fh
422 UV offset
423 IV length
424 SV * callback
425 PROTOTYPE: $$$$
426 CODE:
427{ 1367{
428 aio_req req; 1368 STRLEN svlen;
1369 char *svptr = SvPVbyte (data, svlen);
1370
1371 SvUPGRADE (data, SVt_PV);
1372 SvPOK_on (data);
1373
1374 if (dataoffset < 0)
1375 dataoffset += svlen;
1376
1377 if (dataoffset < 0 || dataoffset > svlen)
1378 croak ("data offset outside of string");
1379
1380 if (ix == REQ_WRITE)
1381 {
1382 /* write: check length and adjust. */
1383 if (length < 0 || length + dataoffset > svlen)
1384 length = svlen - dataoffset;
1385 }
1386 else
1387 {
1388 /* read: grow scalar as necessary */
1389 svptr = SvGROW (data, length + dataoffset);
1390 }
429 1391
430 if (length < 0) 1392 if (length < 0)
431 croak ("length must not be negative"); 1393 croak ("length must not be negative");
432 1394
433 Newz (0, req, 1, aio_cb); 1395 {
1396 dREQ;
434 1397
435 if (!req) 1398 req->type = ix;
436 croak ("out of memory during aio_req allocation"); 1399 req->fh = newSVsv (fh);
1400 req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1401 : IoOFP (sv_2io (fh)));
1402 req->offs = offset;
1403 req->size = length;
1404 req->sv1 = SvREFCNT_inc (data);
1405 req->ptr1 = (char *)svptr + dataoffset;
1406 req->stroffset = dataoffset;
1407
1408 if (!SvREADONLY (data))
1409 {
1410 SvREADONLY_on (data);
1411 req->flags |= FLAG_SV1_RO_OFF;
1412 }
1413
1414 REQ_SEND;
1415 }
1416}
1417
1418void
1419aio_readlink (path,callback=&PL_sv_undef)
1420 SV8 * path
1421 SV * callback
1422 PROTOTYPE: $$;$
1423 PPCODE:
1424{
1425 SV *data;
1426 dREQ;
1427
1428 data = newSV (NAME_MAX);
1429 SvPOK_on (data);
1430
1431 req->type = REQ_READLINK;
1432 req->fh = newSVsv (path);
1433 req->ptr2 = SvPVbyte_nolen (req->fh);
1434 req->sv1 = data;
1435 req->ptr1 = SvPVbyte_nolen (data);
1436
1437 REQ_SEND;
1438}
1439
1440void
1441aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1442 SV * out_fh
1443 SV * in_fh
1444 UV in_offset
1445 UV length
1446 SV * callback
1447 PROTOTYPE: $$$$;$
1448 PPCODE:
1449{
1450 dREQ;
1451
1452 req->type = REQ_SENDFILE;
1453 req->fh = newSVsv (out_fh);
1454 req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1455 req->sv2 = newSVsv (in_fh);
1456 req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1457 req->offs = in_offset;
1458 req->size = length;
1459
1460 REQ_SEND;
1461}
1462
1463void
1464aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1465 SV * fh
1466 UV offset
1467 IV length
1468 SV * callback
1469 PROTOTYPE: $$$;$
1470 PPCODE:
1471{
1472 dREQ;
437 1473
438 req->type = REQ_READAHEAD; 1474 req->type = REQ_READAHEAD;
1475 req->fh = newSVsv (fh);
439 req->fd = PerlIO_fileno (fh); 1476 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
440 req->offset = offset; 1477 req->offs = offset;
441 req->length = length; 1478 req->size = length;
442 req->callback = SvREFCNT_inc (callback);
443 1479
444 send_req (req); 1480 REQ_SEND;
445} 1481}
446 1482
447void 1483void
448aio_stat(fh_or_path,callback) 1484aio_stat (fh_or_path,callback=&PL_sv_undef)
449 SV * fh_or_path 1485 SV8 * fh_or_path
450 SV * callback 1486 SV * callback
451 PROTOTYPE: $$
452 ALIAS: 1487 ALIAS:
1488 aio_stat = REQ_STAT
453 aio_lstat = 1 1489 aio_lstat = REQ_LSTAT
454 CODE: 1490 PPCODE:
455{ 1491{
456 aio_req req; 1492 dREQ;
457 1493
458 Newz (0, req, 1, aio_cb); 1494 req->ptr2 = malloc (sizeof (Stat_t));
459
460 if (!req) 1495 if (!req->ptr2)
461 croak ("out of memory during aio_req allocation"); 1496 {
462 1497 req_free (req);
463 New (0, req->statdata, 1, Stat_t);
464
465 if (!req->statdata)
466 croak ("out of memory during aio_req->statdata allocation"); 1498 croak ("out of memory during aio_stat statdata allocation");
1499 }
1500
1501 req->flags |= FLAG_PTR2_FREE;
467 1502
468 if (SvPOK (fh_or_path)) 1503 if (SvPOK (fh_or_path))
469 { 1504 {
470 req->type = ix ? REQ_LSTAT : REQ_STAT; 1505 req->type = ix;
471 req->data = newSVsv (fh_or_path); 1506 req->sv1 = newSVsv (fh_or_path);
472 req->dataptr = SvPV_nolen (req->data); 1507 req->ptr1 = SvPVbyte_nolen (req->sv1);
473 } 1508 }
474 else 1509 else
475 { 1510 {
476 req->type = REQ_FSTAT; 1511 req->type = REQ_FSTAT;
1512 req->fh = newSVsv (fh_or_path);
477 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1513 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
478 } 1514 }
479 1515
480 req->callback = SvREFCNT_inc (callback); 1516 REQ_SEND;
481
482 send_req (req);
483} 1517}
484 1518
485void 1519void
486aio_unlink(pathname,callback) 1520aio_unlink (pathname,callback=&PL_sv_undef)
487 SV * pathname 1521 SV8 * pathname
488 SV * callback 1522 SV * callback
1523 ALIAS:
1524 aio_unlink = REQ_UNLINK
1525 aio_rmdir = REQ_RMDIR
1526 aio_readdir = REQ_READDIR
1527 PPCODE:
1528{
1529 dREQ;
1530
1531 req->type = ix;
1532 req->sv1 = newSVsv (pathname);
1533 req->ptr1 = SvPVbyte_nolen (req->sv1);
1534
1535 REQ_SEND;
1536}
1537
1538void
1539aio_link (oldpath,newpath,callback=&PL_sv_undef)
1540 SV8 * oldpath
1541 SV8 * newpath
1542 SV * callback
1543 ALIAS:
1544 aio_link = REQ_LINK
1545 aio_symlink = REQ_SYMLINK
1546 aio_rename = REQ_RENAME
1547 PPCODE:
1548{
1549 dREQ;
1550
1551 req->type = ix;
1552 req->fh = newSVsv (oldpath);
1553 req->ptr2 = SvPVbyte_nolen (req->fh);
1554 req->sv1 = newSVsv (newpath);
1555 req->ptr1 = SvPVbyte_nolen (req->sv1);
1556
1557 REQ_SEND;
1558}
1559
1560void
1561aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1562 SV8 * pathname
1563 SV * callback
1564 UV mode
1565 UV dev
1566 PPCODE:
1567{
1568 dREQ;
1569
1570 req->type = REQ_MKNOD;
1571 req->sv1 = newSVsv (pathname);
1572 req->ptr1 = SvPVbyte_nolen (req->sv1);
1573 req->mode = (mode_t)mode;
1574 req->offs = dev;
1575
1576 REQ_SEND;
1577}
1578
1579void
1580aio_busy (delay,callback=&PL_sv_undef)
1581 double delay
1582 SV * callback
1583 PPCODE:
1584{
1585 dREQ;
1586
1587 req->type = REQ_BUSY;
1588 req->int1 = delay < 0. ? 0 : delay;
1589 req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1590
1591 REQ_SEND;
1592}
1593
1594void
1595aio_group (callback=&PL_sv_undef)
1596 SV * callback
489 PROTOTYPE: $$ 1597 PROTOTYPE: ;$
1598 PPCODE:
1599{
1600 dREQ;
1601
1602 req->type = REQ_GROUP;
1603
1604 req_send (req);
1605 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1606}
1607
1608void
1609aio_nop (callback=&PL_sv_undef)
1610 SV * callback
1611 PPCODE:
1612{
1613 dREQ;
1614
1615 req->type = REQ_NOP;
1616
1617 REQ_SEND;
1618}
1619
1620int
1621aioreq_pri (int pri = 0)
1622 PROTOTYPE: ;$
490 CODE: 1623 CODE:
491{ 1624 RETVAL = next_pri - PRI_BIAS;
492 aio_req req; 1625 if (items > 0)
493 1626 {
494 Newz (0, req, 1, aio_cb); 1627 if (pri < PRI_MIN) pri = PRI_MIN;
495 1628 if (pri > PRI_MAX) pri = PRI_MAX;
496 if (!req) 1629 next_pri = pri + PRI_BIAS;
497 croak ("out of memory during aio_req allocation"); 1630 }
498 1631 OUTPUT:
499 req->type = REQ_UNLINK; 1632 RETVAL
500 req->data = newSVsv (pathname); 1633
501 req->dataptr = SvPV_nolen (req->data); 1634void
502 req->callback = SvREFCNT_inc (callback); 1635aioreq_nice (int nice = 0)
503 1636 CODE:
504 send_req (req); 1637 nice = next_pri - nice;
505} 1638 if (nice < PRI_MIN) nice = PRI_MIN;
1639 if (nice > PRI_MAX) nice = PRI_MAX;
1640 next_pri = nice + PRI_BIAS;
1641
1642void
1643flush ()
1644 PROTOTYPE:
1645 CODE:
1646 while (nreqs)
1647 {
1648 poll_wait ();
1649 poll_cb ();
1650 }
1651
1652int
1653poll()
1654 PROTOTYPE:
1655 CODE:
1656 poll_wait ();
1657 RETVAL = poll_cb ();
1658 OUTPUT:
1659 RETVAL
506 1660
507int 1661int
508poll_fileno() 1662poll_fileno()
509 PROTOTYPE: 1663 PROTOTYPE:
510 CODE: 1664 CODE:
511 RETVAL = respipe[0]; 1665 RETVAL = respipe [0];
512 OUTPUT: 1666 OUTPUT:
513 RETVAL 1667 RETVAL
514 1668
515int 1669int
516poll_cb(...) 1670poll_cb(...)
517 PROTOTYPE: 1671 PROTOTYPE:
518 CODE: 1672 CODE:
519 RETVAL = poll_cb (aTHX); 1673 RETVAL = poll_cb ();
520 OUTPUT: 1674 OUTPUT:
521 RETVAL 1675 RETVAL
522 1676
523void 1677void
524poll_wait() 1678poll_wait()
… …
532 CODE: 1686 CODE:
533 RETVAL = nreqs; 1687 RETVAL = nreqs;
534 OUTPUT: 1688 OUTPUT:
535 RETVAL 1689 RETVAL
536 1690
1691int
1692nready()
1693 PROTOTYPE:
1694 CODE:
1695 RETVAL = get_nready ();
1696 OUTPUT:
1697 RETVAL
1698
1699int
1700npending()
1701 PROTOTYPE:
1702 CODE:
1703 RETVAL = get_npending ();
1704 OUTPUT:
1705 RETVAL
1706
1707int
1708nthreads()
1709 PROTOTYPE:
1710 CODE:
1711 if (WORDACCESS_UNSAFE) LOCK (wrklock);
1712 RETVAL = started;
1713 if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1714 OUTPUT:
1715 RETVAL
1716
1717PROTOTYPES: DISABLE
1718
1719MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1720
1721void
1722cancel (aio_req_ornot req)
1723 CODE:
1724 req_cancel (req);
1725
1726void
1727cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1728 CODE:
1729 SvREFCNT_dec (req->callback);
1730 req->callback = newSVsv (callback);
1731
1732MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1733
1734void
1735add (aio_req grp, ...)
1736 PPCODE:
1737{
1738 int i;
1739 aio_req req;
1740
1741 if (grp->int1 == 2)
1742 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1743
1744 for (i = 1; i < items; ++i )
1745 {
1746 if (GIMME_V != G_VOID)
1747 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1748
1749 req = SvAIO_REQ (ST (i));
1750
1751 if (req)
1752 {
1753 ++grp->size;
1754 req->grp = grp;
1755
1756 req->grp_prev = 0;
1757 req->grp_next = grp->grp_first;
1758
1759 if (grp->grp_first)
1760 grp->grp_first->grp_prev = req;
1761
1762 grp->grp_first = req;
1763 }
1764 }
1765}
1766
1767void
1768cancel_subs (aio_req_ornot req)
1769 CODE:
1770 req_cancel_subs (req);
1771
1772void
1773result (aio_req grp, ...)
1774 CODE:
1775{
1776 int i;
1777 AV *av;
1778
1779 grp->errorno = errno;
1780
1781 av = newAV ();
1782
1783 for (i = 1; i < items; ++i )
1784 av_push (av, newSVsv (ST (i)));
1785
1786 SvREFCNT_dec (grp->sv1);
1787 grp->sv1 = (SV *)av;
1788}
1789
1790void
1791errno (aio_req grp, int errorno = errno)
1792 CODE:
1793 grp->errorno = errorno;
1794
1795void
1796limit (aio_req grp, int limit)
1797 CODE:
1798 grp->int2 = limit;
1799 aio_grp_feed (grp);
1800
1801void
1802feed (aio_req grp, SV *callback=&PL_sv_undef)
1803 CODE:
1804{
1805 SvREFCNT_dec (grp->sv2);
1806 grp->sv2 = newSVsv (callback);
1807
1808 if (grp->int2 <= 0)
1809 grp->int2 = 2;
1810
1811 aio_grp_feed (grp);
1812}
1813

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