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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs.
Revision 1.85 by root, Sat Oct 28 23:32:29 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 */
1#define _REENTRANT 1 9#define _REENTRANT 1
10
2#include <errno.h> 11#include <errno.h>
3 12
4#include "EXTERN.h" 13#include "EXTERN.h"
5#include "perl.h" 14#include "perl.h"
6#include "XSUB.h" 15#include "XSUB.h"
9 18
10#include <pthread.h> 19#include <pthread.h>
11 20
12#include <stddef.h> 21#include <stddef.h>
13#include <errno.h> 22#include <errno.h>
23#include <sys/time.h>
24#include <sys/select.h>
14#include <sys/types.h> 25#include <sys/types.h>
15#include <sys/stat.h> 26#include <sys/stat.h>
16#include <limits.h> 27#include <limits.h>
17#include <unistd.h> 28#include <unistd.h>
18#include <fcntl.h> 29#include <fcntl.h>
32# else 43# else
33# error sendfile support requested but not available 44# error sendfile support requested but not available
34# endif 45# endif
35#endif 46#endif
36 47
48/* number of seconds after which idle threads exit */
49#define IDLE_TIMEOUT 10
50
37/* used for struct dirent, AIX doesn't provide it */ 51/* used for struct dirent, AIX doesn't provide it */
38#ifndef NAME_MAX 52#ifndef NAME_MAX
39# define NAME_MAX 4096 53# define NAME_MAX 4096
40#endif 54#endif
41 55
56#ifndef PTHREAD_STACK_MIN
57/* care for broken platforms, e.g. windows */
58# define PTHREAD_STACK_MIN 16384
59#endif
60
42#if __ia64 61#if __ia64
43# define STACKSIZE 65536 62# define STACKSIZE 65536
63#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
64# define STACKSIZE PTHREAD_STACK_MIN
44#else 65#else
45# define STACKSIZE 8192 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 WORDACCESS_UNSAFE
74# if __i386 || __x86_64
75# define WORDACCESS_UNSAFE 0
76# else
77# define WORDACCESS_UNSAFE 1
46#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;
47 91
48enum { 92enum {
49 REQ_QUIT, 93 REQ_QUIT,
50 REQ_OPEN, REQ_CLOSE, 94 REQ_OPEN, REQ_CLOSE,
51 REQ_READ, REQ_WRITE, REQ_READAHEAD, 95 REQ_READ, REQ_WRITE, REQ_READAHEAD,
52 REQ_SENDFILE, 96 REQ_SENDFILE,
53 REQ_STAT, REQ_LSTAT, REQ_FSTAT, 97 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54 REQ_FSYNC, REQ_FDATASYNC, 98 REQ_FSYNC, REQ_FDATASYNC,
55 REQ_UNLINK, REQ_RMDIR, REQ_RENAME, 99 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56 REQ_READDIR, 100 REQ_MKNOD, REQ_READDIR,
57 REQ_LINK, REQ_SYMLINK, 101 REQ_LINK, REQ_SYMLINK,
102 REQ_GROUP, REQ_NOP,
103 REQ_BUSY,
58}; 104};
59 105
60#define AIO_CB_KLASS "IO::AIO::CB" 106#define AIO_REQ_KLASS "IO::AIO::REQ"
107#define AIO_GRP_KLASS "IO::AIO::GRP"
61 108
62typedef struct aio_cb 109typedef struct aio_cb
63{ 110{
64 struct aio_cb *grp_prev, *grp_next;
65 struct aio_grp *grp;
66
67 struct aio_cb *volatile next; 111 struct aio_cb *volatile next;
68
69 SV *self; /* the perl counterpart of this request, if any */
70 112
71 SV *data, *callback; 113 SV *data, *callback;
72 SV *fh, *fh2; 114 SV *fh, *fh2;
73 void *dataptr, *data2ptr; 115 void *dataptr, *data2ptr;
74 Stat_t *statdata; 116 Stat_t *statdata;
75 off_t offset; 117 off_t offset;
76 size_t length; 118 size_t length;
77 ssize_t result; 119 ssize_t result;
78 120
121 STRLEN dataoffset;
79 int type; 122 int type;
80 int fd, fd2; 123 int fd, fd2;
81 int errorno; 124 int errorno;
82 STRLEN dataoffset;
83 mode_t mode; /* open */ 125 mode_t mode; /* open */
126
84 unsigned char cancelled; 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;
85} aio_cb; 132} aio_cb;
133
134enum {
135 FLAG_CANCELLED = 0x01,
136};
86 137
87typedef aio_cb *aio_req; 138typedef aio_cb *aio_req;
88typedef aio_cb *aio_req_ornot; 139typedef aio_cb *aio_req_ornot;
89 140
141enum {
142 PRI_MIN = -4,
143 PRI_MAX = 4,
144
145 DEFAULT_PRI = 0,
146 PRI_BIAS = -PRI_MIN,
147 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148};
149
150#define AIO_TICKS ((1000000 + 1023) >> 10)
151
152static unsigned int max_poll_time = 0;
153static unsigned int max_poll_reqs = 0;
154
155/* calculcate time difference in ~1/AIO_TICKS of a second */
156static int tvdiff (struct timeval *tv1, struct timeval *tv2)
157{
158 return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
159 + ((tv2->tv_usec - tv1->tv_usec) >> 10);
160}
161
162static int next_pri = DEFAULT_PRI + PRI_BIAS;
163
90static int started, wanted; 164static unsigned int started, idle, wanted;
91static volatile int nreqs; 165
92static int max_outstanding = 1<<30; 166#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
167# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
168#else
169# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
170#endif
171
172#define LOCK(mutex) pthread_mutex_lock (&(mutex))
173#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
174
175/* worker threads management */
176static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
177
178typedef struct worker {
179 /* locked by wrklock */
180 struct worker *prev, *next;
181
182 pthread_t tid;
183
184 /* locked by reslock, reqlock or wrklock */
185 aio_req req; /* currently processed request */
186 void *dbuf;
187 DIR *dirp;
188} worker;
189
190static worker wrk_first = { &wrk_first, &wrk_first, 0 };
191
192static void worker_clear (worker *wrk)
193{
194 if (wrk->dirp)
195 {
196 closedir (wrk->dirp);
197 wrk->dirp = 0;
198 }
199
200 if (wrk->dbuf)
201 {
202 free (wrk->dbuf);
203 wrk->dbuf = 0;
204 }
205}
206
207static void worker_free (worker *wrk)
208{
209 wrk->next->prev = wrk->prev;
210 wrk->prev->next = wrk->next;
211
212 free (wrk);
213}
214
215static volatile unsigned int nreqs, nready, npending;
216static volatile unsigned int max_idle = 4;
217static volatile unsigned int max_outstanding = 0xffffffff;
93static int respipe [2]; 218static int respipe [2];
94 219
95static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 220static pthread_mutex_t reslock = AIO_MUTEX_INIT;
96static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 221static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
97static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 222static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
98 223
99static volatile aio_req reqs, reqe; /* queue start, queue end */ 224#if WORDACCESS_UNSAFE
100static volatile aio_req ress, rese; /* queue start, queue end */
101 225
226static unsigned int get_nready ()
227{
228 unsigned int retval;
229
230 LOCK (reqlock);
231 retval = nready;
232 UNLOCK (reqlock);
233
234 return retval;
235}
236
237static unsigned int get_npending ()
238{
239 unsigned int retval;
240
241 LOCK (reslock);
242 retval = npending;
243 UNLOCK (reslock);
244
245 return retval;
246}
247
248static unsigned int get_nthreads ()
249{
250 unsigned int retval;
251
252 LOCK (wrklock);
253 retval = started;
254 UNLOCK (wrklock);
255
256 return retval;
257}
258
259#else
260
261# define get_nready() nready
262# define get_npending() npending
263# define get_nthreads() started
264
265#endif
266
267/*
268 * a somewhat faster data structure might be nice, but
269 * with 8 priorities this actually needs <20 insns
270 * per shift, the most expensive operation.
271 */
102typedef struct aio_grp 272typedef struct {
103{ 273 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
104 struct aio_cb *first, *last; 274 int size;
105 SV *callback; 275} reqq;
106 int busycount;
107} aio_grp;
108 276
109static void aio_grp_begin (aio_grp *grp) 277static reqq req_queue;
110{ 278static reqq res_queue;
111 ++grp->busycount;
112}
113 279
114static void aio_grp_end (aio_grp *grp) 280int reqq_push (reqq *q, aio_req req)
115{ 281{
116 --grp->busycount; 282 int pri = req->pri;
283 req->next = 0;
117 284
118 if (grp->busycount) 285 if (q->qe[pri])
286 {
287 q->qe[pri]->next = req;
288 q->qe[pri] = req;
289 }
290 else
291 q->qe[pri] = q->qs[pri] = req;
292
293 return q->size++;
294}
295
296aio_req reqq_shift (reqq *q)
297{
298 int pri;
299
300 if (!q->size)
119 return; 301 return 0;
120 302
121 SvREFCNT_dec (grp->callback); 303 --q->size;
122 grp->callback = 0;
123}
124 304
125static aio_grp *aio_grp_new () 305 for (pri = NUM_PRI; pri--; )
126{ 306 {
127 aio_grp *grp; 307 aio_req req = q->qs[pri];
128 308
129 Newz (0, grp, 1, aio_grp); 309 if (req)
130 aio_grp_begin (grp); 310 {
311 if (!(q->qs[pri] = req->next))
312 q->qe[pri] = 0;
131 313
132 return grp; 314 return req;
315 }
316 }
317
318 abort ();
133} 319}
320
321static int poll_cb ();
322static void req_invoke (aio_req req);
323static void req_free (aio_req req);
324static void req_cancel (aio_req req);
134 325
135/* must be called at most once */ 326/* must be called at most once */
136static SV *req_sv (aio_req req) 327static SV *req_sv (aio_req req, const char *klass)
137{ 328{
329 if (!req->self)
330 {
138 req->self = (SV *)newHV (); 331 req->self = (SV *)newHV ();
139 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0); 332 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
333 }
140 334
141 return sv_bless (newRV_noinc (req->self), gv_stashpv (AIO_CB_KLASS, 1)); 335 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
142} 336}
143 337
144static aio_req SvAIO_REQ (SV *sv) 338static aio_req SvAIO_REQ (SV *sv)
145{ 339{
340 MAGIC *mg;
341
146 if (!sv_derived_from (sv, AIO_CB_KLASS) || !SvROK (sv)) 342 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
147 croak ("object of class " AIO_CB_KLASS " expected"); 343 croak ("object of class " AIO_REQ_KLASS " expected");
148 344
149 MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext); 345 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
150 346
151 return mg ? (aio_req)mg->mg_ptr : 0; 347 return mg ? (aio_req)mg->mg_ptr : 0;
348}
349
350static void aio_grp_feed (aio_req grp)
351{
352 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
353 {
354 int old_len = grp->length;
355
356 if (grp->fh2 && SvOK (grp->fh2))
357 {
358 dSP;
359
360 ENTER;
361 SAVETMPS;
362 PUSHMARK (SP);
363 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
364 PUTBACK;
365 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
366 SPAGAIN;
367 FREETMPS;
368 LEAVE;
369 }
370
371 /* stop if no progress has been made */
372 if (old_len == grp->length)
373 {
374 SvREFCNT_dec (grp->fh2);
375 grp->fh2 = 0;
376 break;
377 }
378 }
379}
380
381static void aio_grp_dec (aio_req grp)
382{
383 --grp->length;
384
385 /* call feeder, if applicable */
386 aio_grp_feed (grp);
387
388 /* finish, if done */
389 if (!grp->length && grp->fd)
390 {
391 req_invoke (grp);
392 req_free (grp);
393 }
394}
395
396static void req_invoke (aio_req req)
397{
398 dSP;
399
400 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
401 {
402 ENTER;
403 SAVETMPS;
404 PUSHMARK (SP);
405 EXTEND (SP, 1);
406
407 switch (req->type)
408 {
409 case REQ_READDIR:
410 {
411 SV *rv = &PL_sv_undef;
412
413 if (req->result >= 0)
414 {
415 int i;
416 char *buf = req->data2ptr;
417 AV *av = newAV ();
418
419 av_extend (av, req->result - 1);
420
421 for (i = 0; i < req->result; ++i)
422 {
423 SV *sv = newSVpv (buf, 0);
424
425 av_store (av, i, sv);
426 buf += SvCUR (sv) + 1;
427 }
428
429 rv = sv_2mortal (newRV_noinc ((SV *)av));
430 }
431
432 PUSHs (rv);
433 }
434 break;
435
436 case REQ_OPEN:
437 {
438 /* convert fd to fh */
439 SV *fh;
440
441 PUSHs (sv_2mortal (newSViv (req->result)));
442 PUTBACK;
443 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
444 SPAGAIN;
445
446 fh = SvREFCNT_inc (POPs);
447
448 PUSHMARK (SP);
449 XPUSHs (sv_2mortal (fh));
450 }
451 break;
452
453 case REQ_GROUP:
454 req->fd = 2; /* mark group as finished */
455
456 if (req->data)
457 {
458 int i;
459 AV *av = (AV *)req->data;
460
461 EXTEND (SP, AvFILL (av) + 1);
462 for (i = 0; i <= AvFILL (av); ++i)
463 PUSHs (*av_fetch (av, i, 0));
464 }
465 break;
466
467 case REQ_NOP:
468 case REQ_BUSY:
469 break;
470
471 default:
472 PUSHs (sv_2mortal (newSViv (req->result)));
473 break;
474 }
475
476 errno = req->errorno;
477
478 PUTBACK;
479 call_sv (req->callback, G_VOID | G_EVAL);
480 SPAGAIN;
481
482 FREETMPS;
483 LEAVE;
484 }
485
486 if (req->grp)
487 {
488 aio_req grp = req->grp;
489
490 /* unlink request */
491 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
492 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
493
494 if (grp->grp_first == req)
495 grp->grp_first = req->grp_next;
496
497 aio_grp_dec (grp);
498 }
499
500 if (SvTRUE (ERRSV))
501 {
502 req_free (req);
503 croak (0);
504 }
152} 505}
153 506
154static void req_free (aio_req req) 507static void req_free (aio_req req)
155{ 508{
156 if (req->self) 509 if (req->self)
157 { 510 {
158 sv_unmagic (req->self, PERL_MAGIC_ext); 511 sv_unmagic (req->self, PERL_MAGIC_ext);
159 SvREFCNT_dec (req->self); 512 SvREFCNT_dec (req->self);
160 } 513 }
161 514
162 if (req->data)
163 SvREFCNT_dec (req->data); 515 SvREFCNT_dec (req->data);
164
165 if (req->fh)
166 SvREFCNT_dec (req->fh); 516 SvREFCNT_dec (req->fh);
167
168 if (req->fh2)
169 SvREFCNT_dec (req->fh2); 517 SvREFCNT_dec (req->fh2);
170
171 if (req->statdata)
172 Safefree (req->statdata);
173
174 if (req->callback)
175 SvREFCNT_dec (req->callback); 518 SvREFCNT_dec (req->callback);
519 Safefree (req->statdata);
176 520
177 if (req->type == REQ_READDIR && req->result >= 0) 521 if (req->type == REQ_READDIR)
178 free (req->data2ptr); 522 free (req->data2ptr);
179 523
180 Safefree (req); 524 Safefree (req);
181} 525}
182 526
183static void 527static void req_cancel_subs (aio_req grp)
184poll_wait ()
185{ 528{
186 if (nreqs && !ress) 529 aio_req sub;
530
531 if (grp->type != REQ_GROUP)
532 return;
533
534 SvREFCNT_dec (grp->fh2);
535 grp->fh2 = 0;
536
537 for (sub = grp->grp_first; sub; sub = sub->grp_next)
538 req_cancel (sub);
539}
540
541static void req_cancel (aio_req req)
542{
543 req->flags |= FLAG_CANCELLED;
544
545 req_cancel_subs (req);
546}
547
548static void *aio_proc(void *arg);
549
550static void start_thread (void)
551{
552 sigset_t fullsigset, oldsigset;
553 pthread_attr_t attr;
554
555 worker *wrk = calloc (1, sizeof (worker));
556
557 if (!wrk)
558 croak ("unable to allocate worker thread data");
559
560 pthread_attr_init (&attr);
561 pthread_attr_setstacksize (&attr, STACKSIZE);
562 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
563#ifdef PTHREAD_SCOPE_PROCESS
564 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
565#endif
566
567 sigfillset (&fullsigset);
568
569 LOCK (wrklock);
570 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
571
572 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
573 {
574 wrk->prev = &wrk_first;
575 wrk->next = wrk_first.next;
576 wrk_first.next->prev = wrk;
577 wrk_first.next = wrk;
578 ++started;
187 { 579 }
580 else
581 free (wrk);
582
583 sigprocmask (SIG_SETMASK, &oldsigset, 0);
584 UNLOCK (wrklock);
585}
586
587static void maybe_start_thread ()
588{
589 if (get_nthreads () >= wanted)
590 return;
591
592 /* todo: maybe use idle here, but might be less exact */
593 if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
594 return;
595
596 start_thread ();
597}
598
599static void req_send (aio_req req)
600{
601 ++nreqs;
602
603 LOCK (reqlock);
604 ++nready;
605 reqq_push (&req_queue, req);
606 pthread_cond_signal (&reqwait);
607 UNLOCK (reqlock);
608
609 maybe_start_thread ();
610}
611
612static void end_thread (void)
613{
614 aio_req req;
615
616 Newz (0, req, 1, aio_cb);
617
618 req->type = REQ_QUIT;
619 req->pri = PRI_MAX + PRI_BIAS;
620
621 LOCK (reqlock);
622 reqq_push (&req_queue, req);
623 pthread_cond_signal (&reqwait);
624 UNLOCK (reqlock);
625
626 LOCK (wrklock);
627 --started;
628 UNLOCK (wrklock);
629}
630
631static void set_max_idle (int nthreads)
632{
633 if (WORDACCESS_UNSAFE) LOCK (reqlock);
634 max_idle = nthreads <= 0 ? 1 : nthreads;
635 if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
636}
637
638static void min_parallel (int nthreads)
639{
640 if (wanted < nthreads)
641 wanted = nthreads;
642}
643
644static void max_parallel (int nthreads)
645{
646 if (wanted > nthreads)
647 wanted = nthreads;
648
649 while (started > wanted)
650 end_thread ();
651}
652
653static void poll_wait ()
654{
188 fd_set rfd; 655 fd_set rfd;
656
657 while (nreqs)
658 {
659 int size;
660 if (WORDACCESS_UNSAFE) LOCK (reslock);
661 size = res_queue.size;
662 if (WORDACCESS_UNSAFE) UNLOCK (reslock);
663
664 if (size)
665 return;
666
667 maybe_start_thread ();
668
189 FD_ZERO(&rfd); 669 FD_ZERO(&rfd);
190 FD_SET(respipe [0], &rfd); 670 FD_SET(respipe [0], &rfd);
191 671
192 select (respipe [0] + 1, &rfd, 0, 0, 0); 672 select (respipe [0] + 1, &rfd, 0, 0, 0);
193 } 673 }
194} 674}
195 675
196static int 676static int poll_cb ()
197poll_cb ()
198{ 677{
199 dSP; 678 dSP;
200 int count = 0; 679 int count = 0;
680 int maxreqs = max_poll_reqs;
201 int do_croak = 0; 681 int do_croak = 0;
682 struct timeval tv_start, tv_now;
202 aio_req req; 683 aio_req req;
203 684
685 if (max_poll_time)
686 gettimeofday (&tv_start, 0);
687
204 for (;;) 688 for (;;)
205 { 689 {
206 pthread_mutex_lock (&reslock); 690 for (;;)
207 req = ress;
208
209 if (req)
210 { 691 {
211 ress = req->next; 692 maybe_start_thread ();
212 693
694 LOCK (reslock);
695 req = reqq_shift (&res_queue);
696
213 if (!ress) 697 if (req)
214 { 698 {
699 --npending;
700
701 if (!res_queue.size)
702 {
215 /* read any signals sent by the worker threads */ 703 /* read any signals sent by the worker threads */
216 char buf [32]; 704 char buf [32];
217 while (read (respipe [0], buf, 32) == 32) 705 while (read (respipe [0], buf, 32) == 32)
706 ;
218 ; 707 }
219
220 rese = 0;
221 } 708 }
222 }
223 709
224 pthread_mutex_unlock (&reslock); 710 UNLOCK (reslock);
225 711
226 if (!req) 712 if (!req)
227 break; 713 break;
228 714
229 nreqs--; 715 --nreqs;
230 716
231 if (req->type == REQ_QUIT)
232 started--;
233 else
234 {
235 int errorno = errno;
236 errno = req->errorno;
237
238 if (req->type == REQ_READ) 717 if (req->type == REQ_GROUP && req->length)
239 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
240
241 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
242 SvREADONLY_off (req->data);
243
244 if (req->statdata)
245 { 718 {
246 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 719 req->fd = 1; /* mark request as delayed */
247 PL_laststatval = req->result; 720 continue;
248 PL_statcache = *(req->statdata);
249 }
250
251 ENTER;
252 PUSHMARK (SP);
253
254 if (req->type == REQ_READDIR)
255 {
256 SV *rv = &PL_sv_undef;
257
258 if (req->result >= 0)
259 {
260 char *buf = req->data2ptr;
261 AV *av = newAV ();
262
263 while (req->result)
264 {
265 SV *sv = newSVpv (buf, 0);
266
267 av_push (av, sv);
268 buf += SvCUR (sv) + 1;
269 req->result--;
270 }
271
272 rv = sv_2mortal (newRV_noinc ((SV *)av));
273 }
274
275 XPUSHs (rv);
276 } 721 }
277 else 722 else
278 { 723 {
279 XPUSHs (sv_2mortal (newSViv (req->result)));
280
281 if (req->type == REQ_OPEN) 724 if (req->type == REQ_READ)
725 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
726
727 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
728 SvREADONLY_off (req->data);
729
730 if (req->statdata)
282 { 731 {
283 /* convert fd to fh */ 732 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
284 SV *fh; 733 PL_laststatval = req->result;
285 734 PL_statcache = *(req->statdata);
286 PUTBACK;
287 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
288 SPAGAIN;
289
290 fh = SvREFCNT_inc (POPs);
291
292 PUSHMARK (SP);
293 XPUSHs (sv_2mortal (fh));
294 } 735 }
736
737 req_invoke (req);
738
739 count++;
295 } 740 }
296 741
297 if (SvOK (req->callback) && !req->cancelled) 742 req_free (req);
743
744 if (maxreqs && !--maxreqs)
745 break;
746
747 if (max_poll_time)
298 { 748 {
299 PUTBACK; 749 gettimeofday (&tv_now, 0);
300 call_sv (req->callback, G_VOID | G_EVAL);
301 SPAGAIN;
302 750
303 if (SvTRUE (ERRSV)) 751 if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
304 { 752 break;
305 req_free (req);
306 croak (0);
307 }
308 } 753 }
309
310 LEAVE;
311
312 errno = errorno;
313 count++;
314 } 754 }
315 755
316 req_free (req); 756 if (nreqs <= max_outstanding)
757 break;
758
759 poll_wait ();
760
761 ++maxreqs;
317 } 762 }
318 763
319 return count; 764 return count;
320}
321
322static void *aio_proc(void *arg);
323
324static void
325start_thread (void)
326{
327 sigset_t fullsigset, oldsigset;
328 pthread_t tid;
329 pthread_attr_t attr;
330
331 pthread_attr_init (&attr);
332 pthread_attr_setstacksize (&attr, STACKSIZE);
333 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
334
335 sigfillset (&fullsigset);
336 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
337
338 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
339 started++;
340
341 sigprocmask (SIG_SETMASK, &oldsigset, 0);
342}
343
344static void
345req_send (aio_req req)
346{
347 while (started < wanted && nreqs >= started)
348 start_thread ();
349
350 nreqs++;
351
352 pthread_mutex_lock (&reqlock);
353
354 req->next = 0;
355
356 if (reqe)
357 {
358 reqe->next = req;
359 reqe = req;
360 }
361 else
362 reqe = reqs = req;
363
364 pthread_cond_signal (&reqwait);
365 pthread_mutex_unlock (&reqlock);
366
367 if (nreqs > max_outstanding)
368 for (;;)
369 {
370 poll_cb ();
371
372 if (nreqs <= max_outstanding)
373 break;
374
375 poll_wait ();
376 }
377}
378
379static void
380end_thread (void)
381{
382 aio_req req;
383 Newz (0, req, 1, aio_cb);
384 req->type = REQ_QUIT;
385
386 req_send (req);
387}
388
389static void min_parallel (int nthreads)
390{
391 if (wanted < nthreads)
392 wanted = nthreads;
393}
394
395static void max_parallel (int nthreads)
396{
397 int cur = started;
398
399 if (wanted > nthreads)
400 wanted = nthreads;
401
402 while (cur > wanted)
403 {
404 end_thread ();
405 cur--;
406 }
407
408 while (started > wanted)
409 {
410 poll_wait ();
411 poll_cb ();
412 }
413} 765}
414 766
415static void create_pipe () 767static void create_pipe ()
416{ 768{
417 if (pipe (respipe)) 769 if (pipe (respipe))
436 * normal read/write by using a mutex. slows down execution a lot, 788 * normal read/write by using a mutex. slows down execution a lot,
437 * but that's your problem, not mine. 789 * but that's your problem, not mine.
438 */ 790 */
439static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER; 791static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
440 792
441static ssize_t 793static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
442pread (int fd, void *buf, size_t count, off_t offset)
443{ 794{
444 ssize_t res; 795 ssize_t res;
445 off_t ooffset; 796 off_t ooffset;
446 797
447 pthread_mutex_lock (&preadwritelock); 798 LOCK (preadwritelock);
448 ooffset = lseek (fd, 0, SEEK_CUR); 799 ooffset = lseek (fd, 0, SEEK_CUR);
449 lseek (fd, offset, SEEK_SET); 800 lseek (fd, offset, SEEK_SET);
450 res = read (fd, buf, count); 801 res = read (fd, buf, count);
451 lseek (fd, ooffset, SEEK_SET); 802 lseek (fd, ooffset, SEEK_SET);
452 pthread_mutex_unlock (&preadwritelock); 803 UNLOCK (preadwritelock);
453 804
454 return res; 805 return res;
455} 806}
456 807
457static ssize_t
458pwrite (int fd, void *buf, size_t count, off_t offset) 808static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
459{ 809{
460 ssize_t res; 810 ssize_t res;
461 off_t ooffset; 811 off_t ooffset;
462 812
463 pthread_mutex_lock (&preadwritelock); 813 LOCK (preadwritelock);
464 ooffset = lseek (fd, 0, SEEK_CUR); 814 ooffset = lseek (fd, 0, SEEK_CUR);
465 lseek (fd, offset, SEEK_SET); 815 lseek (fd, offset, SEEK_SET);
466 res = write (fd, buf, count); 816 res = write (fd, buf, count);
467 lseek (fd, offset, SEEK_SET); 817 lseek (fd, offset, SEEK_SET);
468 pthread_mutex_unlock (&preadwritelock); 818 UNLOCK (preadwritelock);
469 819
470 return res; 820 return res;
471} 821}
472#endif 822#endif
473 823
474#if !HAVE_FDATASYNC 824#if !HAVE_FDATASYNC
475# define fdatasync fsync 825# define fdatasync fsync
476#endif 826#endif
477 827
478#if !HAVE_READAHEAD 828#if !HAVE_READAHEAD
479# define readahead aio_readahead 829# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
480 830
481static ssize_t 831static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
482readahead (int fd, off_t offset, size_t count)
483{ 832{
484 char readahead_buf[4096]; 833 dBUF;
485 834
486 while (count > 0) 835 while (count > 0)
487 { 836 {
488 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 837 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
489 838
490 pread (fd, readahead_buf, len, offset); 839 pread (fd, aio_buf, len, offset);
491 offset += len; 840 offset += len;
492 count -= len; 841 count -= len;
493 } 842 }
494 843
495 errno = 0; 844 errno = 0;
496} 845}
846
497#endif 847#endif
498 848
499#if !HAVE_READDIR_R 849#if !HAVE_READDIR_R
500# define readdir_r aio_readdir_r 850# define readdir_r aio_readdir_r
501 851
502static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER; 852static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
503 853
504static int
505readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res) 854static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
506{ 855{
507 struct dirent *e; 856 struct dirent *e;
508 int errorno; 857 int errorno;
509 858
510 pthread_mutex_lock (&readdirlock); 859 LOCK (readdirlock);
511 860
512 e = readdir (dirp); 861 e = readdir (dirp);
513 errorno = errno; 862 errorno = errno;
514 863
515 if (e) 864 if (e)
518 strcpy (ent->d_name, e->d_name); 867 strcpy (ent->d_name, e->d_name);
519 } 868 }
520 else 869 else
521 *res = 0; 870 *res = 0;
522 871
523 pthread_mutex_unlock (&readdirlock); 872 UNLOCK (readdirlock);
524 873
525 errno = errorno; 874 errno = errorno;
526 return e ? 0 : -1; 875 return e ? 0 : -1;
527} 876}
528#endif 877#endif
529 878
530/* sendfile always needs emulation */ 879/* sendfile always needs emulation */
531static ssize_t
532sendfile_ (int ofd, int ifd, off_t offset, size_t count) 880static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
533{ 881{
534 ssize_t res; 882 ssize_t res;
535 883
536 if (!count) 884 if (!count)
537 return 0; 885 return 0;
548 { 896 {
549 off_t sbytes; 897 off_t sbytes;
550 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); 898 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
551 899
552 if (res < 0 && sbytes) 900 if (res < 0 && sbytes)
553 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */ 901 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
554 res = sbytes; 902 res = sbytes;
555 } 903 }
556 904
557# elif __hpux 905# elif __hpux
558 res = sendfile (ofd, ifd, offset, count, 0, 0); 906 res = sendfile (ofd, ifd, offset, count, 0, 0);
586#endif 934#endif
587 ) 935 )
588 ) 936 )
589 { 937 {
590 /* emulate sendfile. this is a major pain in the ass */ 938 /* emulate sendfile. this is a major pain in the ass */
591 char buf[4096]; 939 dBUF;
940
592 res = 0; 941 res = 0;
593 942
594 while (count) 943 while (count)
595 { 944 {
596 ssize_t cnt; 945 ssize_t cnt;
597 946
598 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset); 947 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
599 948
600 if (cnt <= 0) 949 if (cnt <= 0)
601 { 950 {
602 if (cnt && !res) res = -1; 951 if (cnt && !res) res = -1;
603 break; 952 break;
604 } 953 }
605 954
606 cnt = write (ofd, buf, cnt); 955 cnt = write (ofd, aio_buf, cnt);
607 956
608 if (cnt <= 0) 957 if (cnt <= 0)
609 { 958 {
610 if (cnt && !res) res = -1; 959 if (cnt && !res) res = -1;
611 break; 960 break;
619 968
620 return res; 969 return res;
621} 970}
622 971
623/* read a full directory */ 972/* read a full directory */
624static int 973static void scandir_ (aio_req req, worker *self)
625scandir_ (const char *path, void **namesp)
626{ 974{
627 DIR *dirp = opendir (path); 975 DIR *dirp;
628 union 976 union
629 { 977 {
630 struct dirent d; 978 struct dirent d;
631 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1]; 979 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
632 } u; 980 } *u;
633 struct dirent *entp; 981 struct dirent *entp;
634 char *name, *names; 982 char *name, *names;
635 int memlen = 4096; 983 int memlen = 4096;
636 int memofs = 0; 984 int memofs = 0;
637 int res = 0; 985 int res = 0;
638 int errorno; 986 int errorno;
639 987
640 if (!dirp) 988 LOCK (wrklock);
641 return -1; 989 self->dirp = dirp = opendir (req->dataptr);
642 990 self->dbuf = u = malloc (sizeof (*u));
643 names = malloc (memlen); 991 req->data2ptr = names = malloc (memlen);
992 UNLOCK (wrklock);
993
994 if (dirp && u && names)
995 for (;;)
996 {
997 errno = 0;
998 readdir_r (dirp, &u->d, &entp);
999
1000 if (!entp)
1001 break;
1002
1003 name = entp->d_name;
1004
1005 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1006 {
1007 int len = strlen (name) + 1;
1008
1009 res++;
1010
1011 while (memofs + len > memlen)
1012 {
1013 memlen *= 2;
1014 LOCK (wrklock);
1015 req->data2ptr = names = realloc (names, memlen);
1016 UNLOCK (wrklock);
1017
1018 if (!names)
1019 break;
1020 }
1021
1022 memcpy (names + memofs, name, len);
1023 memofs += len;
1024 }
1025 }
1026
1027 if (errno)
1028 res = -1;
1029
1030 req->result = res;
1031}
1032
1033/*****************************************************************************/
1034
1035static void *aio_proc (void *thr_arg)
1036{
1037 aio_req req;
1038 struct timespec ts;
1039 worker *self = (worker *)thr_arg;
1040
1041 /* try to distribute timeouts somewhat evenly */
1042 ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1043 * (1000000000UL / 1024UL);
644 1044
645 for (;;) 1045 for (;;)
646 { 1046 {
647 errno = 0, readdir_r (dirp, &u.d, &entp); 1047 ts.tv_sec = time (0) + IDLE_TIMEOUT;
648 1048
649 if (!entp) 1049 LOCK (reqlock);
650 break;
651
652 name = entp->d_name;
653
654 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
655 {
656 int len = strlen (name) + 1;
657
658 res++;
659
660 while (memofs + len > memlen)
661 {
662 memlen *= 2;
663 names = realloc (names, memlen);
664 if (!names)
665 break;
666 }
667
668 memcpy (names + memofs, name, len);
669 memofs += len;
670 }
671 }
672
673 errorno = errno;
674 closedir (dirp);
675
676 if (errorno)
677 {
678 free (names);
679 errno = errorno;
680 res = -1;
681 }
682
683 *namesp = (void *)names;
684 return res;
685}
686
687/*****************************************************************************/
688
689static void *
690aio_proc (void *thr_arg)
691{
692 aio_req req;
693 int type;
694
695 do
696 {
697 pthread_mutex_lock (&reqlock);
698 1050
699 for (;;) 1051 for (;;)
700 { 1052 {
701 req = reqs; 1053 self->req = req = reqq_shift (&req_queue);
702
703 if (reqs)
704 {
705 reqs = reqs->next;
706 if (!reqs) reqe = 0;
707 }
708 1054
709 if (req) 1055 if (req)
710 break; 1056 break;
711 1057
1058 ++idle;
1059
1060 if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1061 == ETIMEDOUT)
1062 {
1063 if (idle > max_idle)
1064 {
1065 --idle;
1066 UNLOCK (reqlock);
1067 LOCK (wrklock);
1068 --started;
1069 UNLOCK (wrklock);
1070 goto quit;
1071 }
1072
1073 /* we are allowed to idle, so do so without any timeout */
712 pthread_cond_wait (&reqwait, &reqlock); 1074 pthread_cond_wait (&reqwait, &reqlock);
1075 ts.tv_sec = time (0) + IDLE_TIMEOUT;
1076 }
1077
1078 --idle;
713 } 1079 }
714 1080
715 pthread_mutex_unlock (&reqlock); 1081 --nready;
1082
1083 UNLOCK (reqlock);
716 1084
717 errno = 0; /* strictly unnecessary */ 1085 errno = 0; /* strictly unnecessary */
718 1086
719 if (!req->cancelled) 1087 if (!(req->flags & FLAG_CANCELLED))
720 switch (req->type) 1088 switch (req->type)
721 { 1089 {
722 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 1090 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
723 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 1091 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
724 1092
725 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 1093 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
726 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break; 1094 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
727 1095
728 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 1096 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
729 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 1097 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
730 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 1098 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
731 1099
734 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 1102 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
735 case REQ_RMDIR: req->result = rmdir (req->dataptr); break; 1103 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
736 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break; 1104 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
737 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break; 1105 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
738 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 1106 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1107 case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
739 1108
740 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 1109 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
741 case REQ_FSYNC: req->result = fsync (req->fd); break; 1110 case REQ_FSYNC: req->result = fsync (req->fd); break;
742 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break; 1111 case REQ_READDIR: scandir_ (req, self); break;
1112
1113 case REQ_BUSY:
1114 {
1115 struct timeval tv;
1116
1117 tv.tv_sec = req->fd;
1118 tv.tv_usec = req->fd2;
1119
1120 req->result = select (0, 0, 0, 0, &tv);
1121 }
1122
1123 case REQ_GROUP:
1124 case REQ_NOP:
1125 break;
743 1126
744 case REQ_QUIT: 1127 case REQ_QUIT:
745 break; 1128 goto quit;
746 1129
747 default: 1130 default:
748 req->result = ENOSYS; 1131 req->result = ENOSYS;
749 break; 1132 break;
750 } 1133 }
751 1134
752 req->errorno = errno; 1135 req->errorno = errno;
753 1136
754 pthread_mutex_lock (&reslock); 1137 LOCK (reslock);
755 1138
756 req->next = 0; 1139 ++npending;
757 1140
758 if (rese) 1141 if (!reqq_push (&res_queue, req))
759 {
760 rese->next = req;
761 rese = req;
762 }
763 else
764 {
765 rese = ress = req;
766
767 /* write a dummy byte to the pipe so fh becomes ready */ 1142 /* write a dummy byte to the pipe so fh becomes ready */
768 write (respipe [1], &respipe, 1); 1143 write (respipe [1], &respipe, 1);
769 }
770 1144
771 pthread_mutex_unlock (&reslock); 1145 self->req = 0;
1146 worker_clear (self);
1147
1148 UNLOCK (reslock);
772 } 1149 }
773 while (type != REQ_QUIT); 1150
1151quit:
1152 LOCK (wrklock);
1153 worker_free (self);
1154 UNLOCK (wrklock);
774 1155
775 return 0; 1156 return 0;
776} 1157}
777 1158
778/*****************************************************************************/ 1159/*****************************************************************************/
779 1160
780static void atfork_prepare (void) 1161static void atfork_prepare (void)
781{ 1162{
782 pthread_mutex_lock (&reqlock); 1163 LOCK (wrklock);
783 pthread_mutex_lock (&reslock); 1164 LOCK (reqlock);
1165 LOCK (reslock);
784#if !HAVE_PREADWRITE 1166#if !HAVE_PREADWRITE
785 pthread_mutex_lock (&preadwritelock); 1167 LOCK (preadwritelock);
786#endif 1168#endif
787#if !HAVE_READDIR_R 1169#if !HAVE_READDIR_R
788 pthread_mutex_lock (&readdirlock); 1170 LOCK (readdirlock);
789#endif 1171#endif
790} 1172}
791 1173
792static void atfork_parent (void) 1174static void atfork_parent (void)
793{ 1175{
794#if !HAVE_READDIR_R 1176#if !HAVE_READDIR_R
795 pthread_mutex_unlock (&readdirlock); 1177 UNLOCK (readdirlock);
796#endif 1178#endif
797#if !HAVE_PREADWRITE 1179#if !HAVE_PREADWRITE
798 pthread_mutex_unlock (&preadwritelock); 1180 UNLOCK (preadwritelock);
799#endif 1181#endif
800 pthread_mutex_unlock (&reslock); 1182 UNLOCK (reslock);
801 pthread_mutex_unlock (&reqlock); 1183 UNLOCK (reqlock);
1184 UNLOCK (wrklock);
802} 1185}
803 1186
804static void atfork_child (void) 1187static void atfork_child (void)
805{ 1188{
806 aio_req prv; 1189 aio_req prv;
807 1190
1191 while (prv = reqq_shift (&req_queue))
1192 req_free (prv);
1193
1194 while (prv = reqq_shift (&res_queue))
1195 req_free (prv);
1196
1197 while (wrk_first.next != &wrk_first)
1198 {
1199 worker *wrk = wrk_first.next;
1200
1201 if (wrk->req)
1202 req_free (wrk->req);
1203
1204 worker_clear (wrk);
1205 worker_free (wrk);
1206 }
1207
808 started = 0; 1208 started = 0;
809 1209 idle = 0;
810 while (reqs) 1210 nreqs = 0;
811 { 1211 nready = 0;
812 prv = reqs; 1212 npending = 0;
813 reqs = prv->next;
814 req_free (prv);
815 }
816
817 reqs = reqe = 0;
818
819 while (ress)
820 {
821 prv = ress;
822 ress = prv->next;
823 req_free (prv);
824 }
825
826 ress = rese = 0;
827 1213
828 close (respipe [0]); 1214 close (respipe [0]);
829 close (respipe [1]); 1215 close (respipe [1]);
830 create_pipe (); 1216 create_pipe ();
831 1217
832 atfork_parent (); 1218 atfork_parent ();
833} 1219}
834 1220
835#define dREQ \ 1221#define dREQ \
836 aio_req req; \ 1222 aio_req req; \
1223 int req_pri = next_pri; \
1224 next_pri = DEFAULT_PRI + PRI_BIAS; \
837 \ 1225 \
838 if (SvOK (callback) && !SvROK (callback)) \ 1226 if (SvOK (callback) && !SvROK (callback)) \
839 croak ("callback must be undef or of reference type"); \ 1227 croak ("callback must be undef or of reference type"); \
840 \ 1228 \
841 Newz (0, req, 1, aio_cb); \ 1229 Newz (0, req, 1, aio_cb); \
842 if (!req) \ 1230 if (!req) \
843 croak ("out of memory during aio_req allocation"); \ 1231 croak ("out of memory during aio_req allocation"); \
844 \ 1232 \
845 req->callback = newSVsv (callback) 1233 req->callback = newSVsv (callback); \
1234 req->pri = req_pri
846 1235
847#define REQ_SEND \ 1236#define REQ_SEND \
848 req_send (req); \ 1237 req_send (req); \
849 \ 1238 \
850 if (GIMME_V != G_VOID) \ 1239 if (GIMME_V != G_VOID) \
851 XPUSHs (req_sv (req)); 1240 XPUSHs (req_sv (req, AIO_REQ_KLASS));
852 1241
853MODULE = IO::AIO PACKAGE = IO::AIO 1242MODULE = IO::AIO PACKAGE = IO::AIO
854 1243
855PROTOTYPES: ENABLE 1244PROTOTYPES: ENABLE
856 1245
857BOOT: 1246BOOT:
858{ 1247{
859 HV *stash = gv_stashpv ("IO::AIO", 1); 1248 HV *stash = gv_stashpv ("IO::AIO", 1);
1249
860 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV)); 1250 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
861 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY)); 1251 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
862 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY)); 1252 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1253 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1254 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1255 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
863 1256
864 create_pipe (); 1257 create_pipe ();
865 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 1258 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
866} 1259}
867 1260
868void 1261void
869min_parallel (nthreads) 1262max_poll_reqs (int nreqs)
870 int nthreads
871 PROTOTYPE: $ 1263 PROTOTYPE: $
1264 CODE:
1265 max_poll_reqs = nreqs;
872 1266
873void 1267void
874max_parallel (nthreads) 1268max_poll_time (double nseconds)
875 int nthreads
876 PROTOTYPE: $ 1269 PROTOTYPE: $
1270 CODE:
1271 max_poll_time = nseconds * AIO_TICKS;
1272
1273void
1274min_parallel (int nthreads)
1275 PROTOTYPE: $
1276
1277void
1278max_parallel (int nthreads)
1279 PROTOTYPE: $
1280
1281void
1282max_idle (int nthreads)
1283 PROTOTYPE: $
1284 CODE:
1285 set_max_idle (nthreads);
877 1286
878int 1287int
879max_outstanding (nreqs) 1288max_outstanding (int maxreqs)
880 int nreqs 1289 PROTOTYPE: $
881 PROTOTYPE: $
882 CODE: 1290 CODE:
883 RETVAL = max_outstanding; 1291 RETVAL = max_outstanding;
884 max_outstanding = nreqs; 1292 max_outstanding = maxreqs;
1293 OUTPUT:
1294 RETVAL
885 1295
886void 1296void
887aio_open (pathname,flags,mode,callback=&PL_sv_undef) 1297aio_open (pathname,flags,mode,callback=&PL_sv_undef)
888 SV * pathname 1298 SV * pathname
889 int flags 1299 int flags
1103 req->dataptr = SvPVbyte_nolen (req->data); 1513 req->dataptr = SvPVbyte_nolen (req->data);
1104 1514
1105 REQ_SEND; 1515 REQ_SEND;
1106} 1516}
1107 1517
1108#if 0
1109
1110# undocumented, because it does not cancel active requests
1111void 1518void
1112cancel_most_requests () 1519aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1520 SV * pathname
1521 SV * callback
1522 UV mode
1523 UV dev
1524 PPCODE:
1525{
1526 dREQ;
1527
1528 req->type = REQ_MKNOD;
1529 req->data = newSVsv (pathname);
1530 req->dataptr = SvPVbyte_nolen (req->data);
1531 req->mode = (mode_t)mode;
1532 req->offset = dev;
1533
1534 REQ_SEND;
1535}
1536
1537void
1538aio_busy (delay,callback=&PL_sv_undef)
1539 double delay
1540 SV * callback
1541 PPCODE:
1542{
1543 dREQ;
1544
1545 req->type = REQ_BUSY;
1546 req->fd = delay < 0. ? 0 : delay;
1547 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1548
1549 REQ_SEND;
1550}
1551
1552void
1553aio_group (callback=&PL_sv_undef)
1554 SV * callback
1113 PROTOTYPE: 1555 PROTOTYPE: ;$
1114 CODE: 1556 PPCODE:
1115{ 1557{
1116 aio_req *req; 1558 dREQ;
1117 1559
1118 pthread_mutex_lock (&reqlock); 1560 req->type = REQ_GROUP;
1119 for (req = reqs; req; req = req->next) 1561 req_send (req);
1120 req->flags |= 1;
1121 pthread_mutex_unlock (&reqlock);
1122 1562
1123 pthread_mutex_lock (&reslock); 1563 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1124 for (req = ress; req; req = req->next)
1125 req->flags |= 1;
1126 pthread_mutex_unlock (&reslock);
1127} 1564}
1128 1565
1129#endif 1566void
1567aio_nop (callback=&PL_sv_undef)
1568 SV * callback
1569 PPCODE:
1570{
1571 dREQ;
1572
1573 req->type = REQ_NOP;
1574
1575 REQ_SEND;
1576}
1577
1578int
1579aioreq_pri (int pri = 0)
1580 PROTOTYPE: ;$
1581 CODE:
1582 RETVAL = next_pri - PRI_BIAS;
1583 if (items > 0)
1584 {
1585 if (pri < PRI_MIN) pri = PRI_MIN;
1586 if (pri > PRI_MAX) pri = PRI_MAX;
1587 next_pri = pri + PRI_BIAS;
1588 }
1589 OUTPUT:
1590 RETVAL
1591
1592void
1593aioreq_nice (int nice = 0)
1594 CODE:
1595 nice = next_pri - nice;
1596 if (nice < PRI_MIN) nice = PRI_MIN;
1597 if (nice > PRI_MAX) nice = PRI_MAX;
1598 next_pri = nice + PRI_BIAS;
1130 1599
1131void 1600void
1132flush () 1601flush ()
1133 PROTOTYPE: 1602 PROTOTYPE:
1134 CODE: 1603 CODE:
1135 while (nreqs) 1604 while (nreqs)
1136 { 1605 {
1137 poll_wait (); 1606 poll_wait ();
1138 poll_cb (); 1607 poll_cb (0);
1139 } 1608 }
1140 1609
1141void 1610void
1142poll() 1611poll()
1143 PROTOTYPE: 1612 PROTOTYPE:
1144 CODE: 1613 CODE:
1145 if (nreqs) 1614 if (nreqs)
1146 { 1615 {
1147 poll_wait (); 1616 poll_wait ();
1148 poll_cb (); 1617 poll_cb (0);
1149 } 1618 }
1150 1619
1151int 1620int
1152poll_fileno() 1621poll_fileno()
1153 PROTOTYPE: 1622 PROTOTYPE:
1177 CODE: 1646 CODE:
1178 RETVAL = nreqs; 1647 RETVAL = nreqs;
1179 OUTPUT: 1648 OUTPUT:
1180 RETVAL 1649 RETVAL
1181 1650
1182MODULE = IO::AIO PACKAGE = IO::AIO::CB 1651int
1183 1652nready()
1184void
1185cancel (aio_req_ornot req)
1186 PROTOTYPE: 1653 PROTOTYPE:
1187 CODE: 1654 CODE:
1188 req->cancelled = 1; 1655 RETVAL = get_nready ();
1656 OUTPUT:
1657 RETVAL
1189 1658
1659int
1660npending()
1661 PROTOTYPE:
1662 CODE:
1663 RETVAL = get_npending ();
1664 OUTPUT:
1665 RETVAL
1666
1667int
1668nthreads()
1669 PROTOTYPE:
1670 CODE:
1671 if (WORDACCESS_UNSAFE) LOCK (wrklock);
1672 RETVAL = started;
1673 if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1674 OUTPUT:
1675 RETVAL
1676
1677PROTOTYPES: DISABLE
1678
1679MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1680
1681void
1682cancel (aio_req_ornot req)
1683 CODE:
1684 req_cancel (req);
1685
1686void
1687cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1688 CODE:
1689 SvREFCNT_dec (req->callback);
1690 req->callback = newSVsv (callback);
1691
1692MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1693
1694void
1695add (aio_req grp, ...)
1696 PPCODE:
1697{
1698 int i;
1699 aio_req req;
1700
1701 if (grp->fd == 2)
1702 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1703
1704 for (i = 1; i < items; ++i )
1705 {
1706 if (GIMME_V != G_VOID)
1707 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1708
1709 req = SvAIO_REQ (ST (i));
1710
1711 if (req)
1712 {
1713 ++grp->length;
1714 req->grp = grp;
1715
1716 req->grp_prev = 0;
1717 req->grp_next = grp->grp_first;
1718
1719 if (grp->grp_first)
1720 grp->grp_first->grp_prev = req;
1721
1722 grp->grp_first = req;
1723 }
1724 }
1725}
1726
1727void
1728cancel_subs (aio_req_ornot req)
1729 CODE:
1730 req_cancel_subs (req);
1731
1732void
1733result (aio_req grp, ...)
1734 CODE:
1735{
1736 int i;
1737 AV *av;
1738
1739 grp->errorno = errno;
1740
1741 av = newAV ();
1742
1743 for (i = 1; i < items; ++i )
1744 av_push (av, newSVsv (ST (i)));
1745
1746 SvREFCNT_dec (grp->data);
1747 grp->data = (SV *)av;
1748}
1749
1750void
1751errno (aio_req grp, int errorno = errno)
1752 CODE:
1753 grp->errorno = errorno;
1754
1755void
1756limit (aio_req grp, int limit)
1757 CODE:
1758 grp->fd2 = limit;
1759 aio_grp_feed (grp);
1760
1761void
1762feed (aio_req grp, SV *callback=&PL_sv_undef)
1763 CODE:
1764{
1765 SvREFCNT_dec (grp->fh2);
1766 grp->fh2 = newSVsv (callback);
1767
1768 if (grp->fd2 <= 0)
1769 grp->fd2 = 2;
1770
1771 aio_grp_feed (grp);
1772}
1773

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