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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.11 by root, Wed Jul 20 21:55:27 2005 UTC vs.
Revision 1.76 by root, Thu Oct 26 12:38:04 2006 UTC

1/* solaris */
2#define _POSIX_PTHREAD_SEMANTICS 1
3
4#if __linux && !defined(_GNU_SOURCE)
1#define _XOPEN_SOURCE 500 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>
9 27#include <limits.h>
10#include <unistd.h> 28#include <unistd.h>
11#include <fcntl.h> 29#include <fcntl.h>
12#include <signal.h> 30#include <signal.h>
13#include <sched.h> 31#include <sched.h>
32
33#if HAVE_SENDFILE
14#if __linux 34# if __linux
35# include <sys/sendfile.h>
36# elif __freebsd
15#include <sys/syscall.h> 37# include <sys/socket.h>
38# include <sys/uio.h>
39# elif __hpux
40# include <sys/socket.h>
41# elif __solaris /* not yet */
42# include <sys/sendfile.h>
43# else
44# error sendfile support requested but not available
16#endif 45# endif
46#endif
17 47
18#include <pthread.h> 48/* used for struct dirent, AIX doesn't provide it */
49#ifndef NAME_MAX
50# define NAME_MAX 4096
51#endif
19 52
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 53#ifndef PTHREAD_STACK_MIN
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 54/* care for broken platforms, e.g. windows */
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 55# define PTHREAD_STACK_MIN 16384
56#endif
23 57
24#if __ia64 58#if __ia64
25# define STACKSIZE 65536 59# define STACKSIZE 65536
60#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61# define STACKSIZE PTHREAD_STACK_MIN
26#else 62#else
27# define STACKSIZE 4096 63# define STACKSIZE 16384
28#endif 64#endif
65
66/* buffer size for various temporary buffers */
67#define AIO_BUFSIZE 65536
68
69#define dBUF \
70 char *aio_buf; \
71 LOCK (wrklock); \
72 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
73 UNLOCK (wrklock); \
74 if (!aio_buf) \
75 return -1;
29 76
30enum { 77enum {
31 REQ_QUIT, 78 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 79 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 80 REQ_READ, REQ_WRITE, REQ_READAHEAD,
81 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 82 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 83 REQ_FSYNC, REQ_FDATASYNC,
84 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
85 REQ_READDIR,
86 REQ_LINK, REQ_SYMLINK,
87 REQ_GROUP, REQ_NOP,
88 REQ_BUSY,
36}; 89};
37 90
91#define AIO_REQ_KLASS "IO::AIO::REQ"
92#define AIO_GRP_KLASS "IO::AIO::GRP"
93
38typedef struct aio_cb { 94typedef struct aio_cb
95{
39 struct aio_cb *volatile next; 96 struct aio_cb *volatile next;
40 97
41 int type; 98 SV *data, *callback;
42 99 SV *fh, *fh2;
43 int fd; 100 void *dataptr, *data2ptr;
101 Stat_t *statdata;
44 off_t offset; 102 off_t offset;
45 size_t length; 103 size_t length;
46 ssize_t result; 104 ssize_t result;
105
106 STRLEN dataoffset;
107 int type;
108 int fd, fd2;
109 int errorno;
47 mode_t mode; /* open */ 110 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 111
53 Stat_t *statdata; 112 unsigned char flags;
113 unsigned char pri;
114
115 SV *self; /* the perl counterpart of this request, if any */
116 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 117} aio_cb;
55 118
119enum {
120 FLAG_CANCELLED = 0x01,
121};
122
56typedef aio_cb *aio_req; 123typedef aio_cb *aio_req;
124typedef aio_cb *aio_req_ornot;
57 125
126enum {
127 PRI_MIN = -4,
128 PRI_MAX = 4,
129
130 DEFAULT_PRI = 0,
131 PRI_BIAS = -PRI_MIN,
132 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
133};
134
135static int next_pri = DEFAULT_PRI + PRI_BIAS;
136
58static int started; 137static int started, wanted;
59static volatile int nreqs; 138static volatile int nreqs;
60static int max_outstanding = 1<<30;
61static int respipe [2]; 139static int respipe [2];
62 140
141#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
142# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
143#else
144# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
145#endif
146
147#define LOCK(mutex) pthread_mutex_lock (&(mutex))
148#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
149
150/* worker threads management */
151static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
152
153typedef struct worker {
154 /* locked by wrklock */
155 struct worker *prev, *next;
156
157 pthread_t tid;
158
159 /* locked by reslock, reqlock or wrklock */
160 aio_req req; /* currently processed request */
161 void *dbuf;
162 DIR *dirp;
163} worker;
164
165static worker wrk_first = { &wrk_first, &wrk_first, 0 };
166
167static void worker_clear (worker *wrk)
168{
169 if (wrk->dirp)
170 {
171 closedir (wrk->dirp);
172 wrk->dirp = 0;
173 }
174
175 if (wrk->dbuf)
176 {
177 free (wrk->dbuf);
178 wrk->dbuf = 0;
179 }
180}
181
182static void worker_free (worker *wrk)
183{
184 wrk->next->prev = wrk->prev;
185 wrk->prev->next = wrk->next;
186
187 free (wrk);
188}
189
63static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 190static pthread_mutex_t reslock = AIO_MUTEX_INIT;
64static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 191static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
65static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 192static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66 193
67static volatile aio_req reqs, reqe; /* queue start, queue end */ 194/*
68static volatile aio_req ress, rese; /* queue start, queue end */ 195 * a somewhat faster data structure might be nice, but
196 * with 8 priorities this actually needs <20 insns
197 * per shift, the most expensive operation.
198 */
199typedef struct {
200 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
201 int size;
202} reqq;
69 203
70static void 204static reqq req_queue;
71poll_wait () 205static reqq res_queue;
206
207int reqq_push (reqq *q, aio_req req)
72{ 208{
73 if (nreqs && !ress) 209 int pri = req->pri;
210 req->next = 0;
211
212 if (q->qe[pri])
213 {
214 q->qe[pri]->next = req;
215 q->qe[pri] = req;
74 { 216 }
217 else
218 q->qe[pri] = q->qs[pri] = req;
219
220 return q->size++;
221}
222
223aio_req reqq_shift (reqq *q)
224{
225 int pri;
226
227 if (!q->size)
228 return 0;
229
230 --q->size;
231
232 for (pri = NUM_PRI; pri--; )
233 {
234 aio_req req = q->qs[pri];
235
236 if (req)
237 {
238 if (!(q->qs[pri] = req->next))
239 q->qe[pri] = 0;
240
241 return req;
242 }
243 }
244
245 abort ();
246}
247
248static int poll_cb (int max);
249static void req_invoke (aio_req req);
250static void req_free (aio_req req);
251static void req_cancel (aio_req req);
252
253/* must be called at most once */
254static SV *req_sv (aio_req req, const char *klass)
255{
256 if (!req->self)
257 {
258 req->self = (SV *)newHV ();
259 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
260 }
261
262 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
263}
264
265static aio_req SvAIO_REQ (SV *sv)
266{
267 MAGIC *mg;
268
269 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
270 croak ("object of class " AIO_REQ_KLASS " expected");
271
272 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
273
274 return mg ? (aio_req)mg->mg_ptr : 0;
275}
276
277static void aio_grp_feed (aio_req grp)
278{
279 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
280 {
281 int old_len = grp->length;
282
283 if (grp->fh2 && SvOK (grp->fh2))
284 {
285 dSP;
286
287 ENTER;
288 SAVETMPS;
289 PUSHMARK (SP);
290 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
291 PUTBACK;
292 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
293 SPAGAIN;
294 FREETMPS;
295 LEAVE;
296 }
297
298 /* stop if no progress has been made */
299 if (old_len == grp->length)
300 {
301 SvREFCNT_dec (grp->fh2);
302 grp->fh2 = 0;
303 break;
304 }
305 }
306}
307
308static void aio_grp_dec (aio_req grp)
309{
310 --grp->length;
311
312 /* call feeder, if applicable */
313 aio_grp_feed (grp);
314
315 /* finish, if done */
316 if (!grp->length && grp->fd)
317 {
318 req_invoke (grp);
319 req_free (grp);
320 }
321}
322
323static void poll_wait ()
324{
75 fd_set rfd; 325 fd_set rfd;
326
327 while (nreqs)
328 {
329 int size;
330#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
331 LOCK (reslock);
332#endif
333 size = res_queue.size;
334#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
335 UNLOCK (reslock);
336#endif
337
338 if (size)
339 return;
340
76 FD_ZERO(&rfd); 341 FD_ZERO(&rfd);
77 FD_SET(respipe [0], &rfd); 342 FD_SET(respipe [0], &rfd);
78 343
79 select (respipe [0] + 1, &rfd, 0, 0, 0); 344 select (respipe [0] + 1, &rfd, 0, 0, 0);
80 } 345 }
81} 346}
82 347
83static int 348static void req_invoke (aio_req req)
84poll_cb () 349{
350 dSP;
351
352 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
353 {
354 errno = req->errorno;
355
356 ENTER;
357 SAVETMPS;
358 PUSHMARK (SP);
359 EXTEND (SP, 1);
360
361 switch (req->type)
362 {
363 case REQ_READDIR:
364 {
365 SV *rv = &PL_sv_undef;
366
367 if (req->result >= 0)
368 {
369 int i;
370 char *buf = req->data2ptr;
371 AV *av = newAV ();
372
373 av_extend (av, req->result - 1);
374
375 for (i = 0; i < req->result; ++i)
376 {
377 SV *sv = newSVpv (buf, 0);
378
379 av_store (av, i, sv);
380 buf += SvCUR (sv) + 1;
381 }
382
383 rv = sv_2mortal (newRV_noinc ((SV *)av));
384 }
385
386 PUSHs (rv);
387 }
388 break;
389
390 case REQ_OPEN:
391 {
392 /* convert fd to fh */
393 SV *fh;
394
395 PUSHs (sv_2mortal (newSViv (req->result)));
396 PUTBACK;
397 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
398 SPAGAIN;
399
400 fh = SvREFCNT_inc (POPs);
401
402 PUSHMARK (SP);
403 XPUSHs (sv_2mortal (fh));
404 }
405 break;
406
407 case REQ_GROUP:
408 req->fd = 2; /* mark group as finished */
409
410 if (req->data)
411 {
412 int i;
413 AV *av = (AV *)req->data;
414
415 EXTEND (SP, AvFILL (av) + 1);
416 for (i = 0; i <= AvFILL (av); ++i)
417 PUSHs (*av_fetch (av, i, 0));
418 }
419 break;
420
421 case REQ_NOP:
422 case REQ_BUSY:
423 break;
424
425 default:
426 PUSHs (sv_2mortal (newSViv (req->result)));
427 break;
428 }
429
430
431 PUTBACK;
432 call_sv (req->callback, G_VOID | G_EVAL);
433 SPAGAIN;
434
435 FREETMPS;
436 LEAVE;
437 }
438
439 if (req->grp)
440 {
441 aio_req grp = req->grp;
442
443 /* unlink request */
444 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
445 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
446
447 if (grp->grp_first == req)
448 grp->grp_first = req->grp_next;
449
450 aio_grp_dec (grp);
451 }
452
453 if (SvTRUE (ERRSV))
454 {
455 req_free (req);
456 croak (0);
457 }
458}
459
460static void req_free (aio_req req)
461{
462 if (req->self)
463 {
464 sv_unmagic (req->self, PERL_MAGIC_ext);
465 SvREFCNT_dec (req->self);
466 }
467
468 SvREFCNT_dec (req->data);
469 SvREFCNT_dec (req->fh);
470 SvREFCNT_dec (req->fh2);
471 SvREFCNT_dec (req->callback);
472 Safefree (req->statdata);
473
474 if (req->type == REQ_READDIR)
475 free (req->data2ptr);
476
477 Safefree (req);
478}
479
480static void req_cancel_subs (aio_req grp)
481{
482 aio_req sub;
483
484 if (grp->type != REQ_GROUP)
485 return;
486
487 SvREFCNT_dec (grp->fh2);
488 grp->fh2 = 0;
489
490 for (sub = grp->grp_first; sub; sub = sub->grp_next)
491 req_cancel (sub);
492}
493
494static void req_cancel (aio_req req)
495{
496 req->flags |= FLAG_CANCELLED;
497
498 req_cancel_subs (req);
499}
500
501static int poll_cb (int max)
85{ 502{
86 dSP; 503 dSP;
87 int count = 0; 504 int count = 0;
505 int do_croak = 0;
88 aio_req req, prv; 506 aio_req req;
89 507
90 static int rl;//D 508 while (max <= 0 || count < max)
91 //printf ("%d ENTER\n", ++rl);//D
92
93 pthread_mutex_lock (&reslock);
94
95 { 509 {
510 LOCK (reslock);
511 req = reqq_shift (&res_queue);
512
513 if (req)
514 {
515 if (!res_queue.size)
516 {
96 /* read any signals sent by the worker threads */ 517 /* read any signals sent by the worker threads */
97 char buf [32]; 518 char buf [32];
98 while (read (respipe [0], buf, 32) > 0) 519 while (read (respipe [0], buf, 32) == 32)
520 ;
521 }
99 ; 522 }
100 }
101 523
102 req = ress; 524 UNLOCK (reslock);
103 ress = rese = 0;
104 525
105 pthread_mutex_unlock (&reslock); 526 if (!req)
527 break;
106 528
107 while (req)
108 {
109 nreqs--; 529 --nreqs;
110 //printf ("%d count %d %p->%p\n", rl, count, req, req->next);//D
111 530
112 if (req->type == REQ_QUIT) 531 if (req->type == REQ_QUIT)
113 started--; 532 started--;
533 else if (req->type == REQ_GROUP && req->length)
534 {
535 req->fd = 1; /* mark request as delayed */
536 continue;
537 }
114 else 538 else
115 { 539 {
116 int errorno = errno;
117 errno = req->errorno;
118
119 if (req->type == REQ_READ) 540 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset 541 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121 + req->result > 0 ? req->result : 0);
122 542
543 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
544 SvREADONLY_off (req->data);
545
123 if (req->data) 546 if (req->statdata)
124 SvREFCNT_dec (req->data);
125
126 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127 { 547 {
128 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 548 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129 PL_laststatval = req->result; 549 PL_laststatval = req->result;
130 PL_statcache = *(req->statdata); 550 PL_statcache = *(req->statdata);
131
132 Safefree (req->statdata);
133 } 551 }
134 552
135 PUSHMARK (SP); 553 req_invoke (req);
136 XPUSHs (sv_2mortal (newSViv (req->result)));
137 554
138 if (req->type == REQ_OPEN)
139 {
140 /* convert fd to fh */
141 SV *fh;
142
143 PUTBACK;
144 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
145 SPAGAIN;
146
147 fh = POPs;
148
149 PUSHMARK (SP);
150 XPUSHs (fh);
151 }
152
153 if (SvOK (req->callback))
154 {
155 PUTBACK;
156 call_sv (req->callback, G_VOID | G_EVAL);
157 SPAGAIN;
158 }
159
160 if (req->callback)
161 SvREFCNT_dec (req->callback);
162
163 errno = errorno;
164 count++; 555 count++;
165 } 556 }
166 557
167 prv = req;
168 req = req->next;
169 Safefree (prv); 558 req_free (req);
170
171 /* TODO: croak on errors? */
172 } 559 }
173 560
174 //printf ("%d LEAVE %p %p\n", rl--, ress, rese);//D
175 return count; 561 return count;
176} 562}
177 563
178static void *aio_proc(void *arg); 564static void *aio_proc(void *arg);
179 565
180static void
181start_thread (void) 566static void start_thread (void)
182{ 567{
183 sigset_t fullsigset, oldsigset; 568 sigset_t fullsigset, oldsigset;
184 pthread_t tid;
185 pthread_attr_t attr; 569 pthread_attr_t attr;
570
571 worker *wrk = calloc (1, sizeof (worker));
572
573 if (!wrk)
574 croak ("unable to allocate worker thread data");
186 575
187 pthread_attr_init (&attr); 576 pthread_attr_init (&attr);
188 pthread_attr_setstacksize (&attr, STACKSIZE); 577 pthread_attr_setstacksize (&attr, STACKSIZE);
189 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 578 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
190 579
191 sigfillset (&fullsigset); 580 sigfillset (&fullsigset);
581
582 LOCK (wrklock);
192 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 583 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
193 584
194 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 585 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
586 {
587 wrk->prev = &wrk_first;
588 wrk->next = wrk_first.next;
589 wrk_first.next->prev = wrk;
590 wrk_first.next = wrk;
195 started++; 591 started++;
592 }
593 else
594 free (wrk);
196 595
197 sigprocmask (SIG_SETMASK, &oldsigset, 0); 596 sigprocmask (SIG_SETMASK, &oldsigset, 0);
597 UNLOCK (wrklock);
198} 598}
199 599
200static void 600static void req_send (aio_req req)
201send_req (aio_req req)
202{ 601{
602 while (started < wanted && nreqs >= started)
603 start_thread ();
604
203 nreqs++; 605 ++nreqs;
204 606
205 pthread_mutex_lock (&reqlock); 607 LOCK (reqlock);
608 reqq_push (&req_queue, req);
609 pthread_cond_signal (&reqwait);
610 UNLOCK (reqlock);
611}
206 612
207 req->next = 0; 613static void end_thread (void)
614{
615 aio_req req;
208 616
617 Newz (0, req, 1, aio_cb);
618
619 req->type = REQ_QUIT;
620 req->pri = PRI_MAX + PRI_BIAS;
621
622 req_send (req);
623}
624
625static void min_parallel (int nthreads)
626{
627 if (wanted < nthreads)
628 wanted = nthreads;
629}
630
631static void max_parallel (int nthreads)
632{
633 int cur = started;
634
635 if (wanted > nthreads)
636 wanted = nthreads;
637
638 while (cur > wanted)
639 {
640 end_thread ();
641 cur--;
642 }
643
644 while (started > wanted)
645 {
646 poll_wait ();
647 poll_cb (0);
648 }
649}
650
651static void create_pipe ()
652{
653 if (pipe (respipe))
654 croak ("unable to initialize result pipe");
655
656 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
657 croak ("cannot set result pipe to nonblocking mode");
658
659 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
660 croak ("cannot set result pipe to nonblocking mode");
661}
662
663/*****************************************************************************/
664/* work around various missing functions */
665
666#if !HAVE_PREADWRITE
667# define pread aio_pread
668# define pwrite aio_pwrite
669
670/*
671 * make our pread/pwrite safe against themselves, but not against
672 * normal read/write by using a mutex. slows down execution a lot,
673 * but that's your problem, not mine.
674 */
675static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
676
677static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
678{
679 ssize_t res;
680 off_t ooffset;
681
682 LOCK (preadwritelock);
683 ooffset = lseek (fd, 0, SEEK_CUR);
684 lseek (fd, offset, SEEK_SET);
685 res = read (fd, buf, count);
686 lseek (fd, ooffset, SEEK_SET);
687 UNLOCK (preadwritelock);
688
689 return res;
690}
691
692static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
693{
694 ssize_t res;
695 off_t ooffset;
696
697 LOCK (preadwritelock);
698 ooffset = lseek (fd, 0, SEEK_CUR);
699 lseek (fd, offset, SEEK_SET);
700 res = write (fd, buf, count);
701 lseek (fd, offset, SEEK_SET);
702 UNLOCK (preadwritelock);
703
704 return res;
705}
706#endif
707
708#if !HAVE_FDATASYNC
709# define fdatasync fsync
710#endif
711
712#if !HAVE_READAHEAD
713# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
714
715static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
716{
717 dBUF;
718
719 while (count > 0)
720 {
721 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
722
723 pread (fd, aio_buf, len, offset);
724 offset += len;
725 count -= len;
726 }
727
728 errno = 0;
729}
730
731#endif
732
733#if !HAVE_READDIR_R
734# define readdir_r aio_readdir_r
735
736static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
737
738static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
739{
740 struct dirent *e;
741 int errorno;
742
743 LOCK (readdirlock);
744
745 e = readdir (dirp);
746 errorno = errno;
747
209 if (reqe) 748 if (e)
210 { 749 {
211 reqe->next = req; 750 *res = ent;
212 reqe = req; 751 strcpy (ent->d_name, e->d_name);
213 } 752 }
214 else 753 else
215 reqe = reqs = req; 754 *res = 0;
216 755
217 pthread_cond_signal (&reqwait); 756 UNLOCK (readdirlock);
218 pthread_mutex_unlock (&reqlock);
219 757
220 while (nreqs > max_outstanding) 758 errno = errorno;
759 return e ? 0 : -1;
760}
761#endif
762
763/* sendfile always needs emulation */
764static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
765{
766 ssize_t res;
767
768 if (!count)
769 return 0;
770
771#if HAVE_SENDFILE
772# if __linux
773 res = sendfile (ofd, ifd, &offset, count);
774
775# elif __freebsd
776 /*
777 * Of course, the freebsd sendfile is a dire hack with no thoughts
778 * wasted on making it similar to other I/O functions.
779 */
780 {
781 off_t sbytes;
782 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
783
784 if (res < 0 && sbytes)
785 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
786 res = sbytes;
787 }
788
789# elif __hpux
790 res = sendfile (ofd, ifd, offset, count, 0, 0);
791
792# elif __solaris
793 {
794 struct sendfilevec vec;
795 size_t sbytes;
796
797 vec.sfv_fd = ifd;
798 vec.sfv_flag = 0;
799 vec.sfv_off = offset;
800 vec.sfv_len = count;
801
802 res = sendfilev (ofd, &vec, 1, &sbytes);
803
804 if (res < 0 && sbytes)
805 res = sbytes;
806 }
807
808# endif
809#else
810 res = -1;
811 errno = ENOSYS;
812#endif
813
814 if (res < 0
815 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
816#if __solaris
817 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
818#endif
819 )
820 )
821 {
822 /* emulate sendfile. this is a major pain in the ass */
823 dBUF;
824
825 res = 0;
826
827 while (count)
828 {
829 ssize_t cnt;
830
831 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
832
833 if (cnt <= 0)
834 {
835 if (cnt && !res) res = -1;
836 break;
837 }
838
839 cnt = write (ofd, aio_buf, cnt);
840
841 if (cnt <= 0)
842 {
843 if (cnt && !res) res = -1;
844 break;
845 }
846
847 offset += cnt;
848 res += cnt;
849 count -= cnt;
850 }
851 }
852
853 return res;
854}
855
856/* read a full directory */
857static void scandir_ (aio_req req, worker *self)
858{
859 DIR *dirp;
860 union
861 {
862 struct dirent d;
863 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
864 } *u;
865 struct dirent *entp;
866 char *name, *names;
867 int memlen = 4096;
868 int memofs = 0;
869 int res = 0;
870 int errorno;
871
872 LOCK (wrklock);
873 self->dirp = dirp = opendir (req->dataptr);
874 self->dbuf = u = malloc (sizeof (*u));
875 req->data2ptr = names = malloc (memlen);
876 UNLOCK (wrklock);
877
878 if (dirp && u && names)
879 for (;;)
221 { 880 {
222 poll_wait (); 881 errno = 0;
223 poll_cb (); 882 readdir_r (dirp, &u->d, &entp);
883
884 if (!entp)
885 break;
886
887 name = entp->d_name;
888
889 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
890 {
891 int len = strlen (name) + 1;
892
893 res++;
894
895 while (memofs + len > memlen)
896 {
897 memlen *= 2;
898 LOCK (wrklock);
899 req->data2ptr = names = realloc (names, memlen);
900 UNLOCK (wrklock);
901
902 if (!names)
903 break;
904 }
905
906 memcpy (names + memofs, name, len);
907 memofs += len;
908 }
224 } 909 }
225}
226 910
227static void 911 if (errno)
228end_thread (void) 912 res = -1;
229{ 913
230 aio_req req; 914 req->result = res;
231 New (0, req, 1, aio_cb);
232 req->type = REQ_QUIT;
233
234 send_req (req);
235} 915}
236 916
237static void 917/*****************************************************************************/
238read_write (int dowrite, int fd, off_t offset, size_t length,
239 SV *data, STRLEN dataoffset, SV *callback)
240{
241 aio_req req;
242 STRLEN svlen;
243 char *svptr = SvPV (data, svlen);
244 918
245 SvUPGRADE (data, SVt_PV);
246 SvPOK_on (data);
247
248 if (dataoffset < 0)
249 dataoffset += svlen;
250
251 if (dataoffset < 0 || dataoffset > svlen)
252 croak ("data offset outside of string");
253
254 if (dowrite)
255 {
256 /* write: check length and adjust. */
257 if (length < 0 || length + dataoffset > svlen)
258 length = svlen - dataoffset;
259 }
260 else
261 {
262 /* read: grow scalar as necessary */
263 svptr = SvGROW (data, length + dataoffset);
264 }
265
266 if (length < 0)
267 croak ("length must not be negative");
268
269 Newz (0, req, 1, aio_cb);
270
271 if (!req)
272 croak ("out of memory during aio_req allocation");
273
274 req->type = dowrite ? REQ_WRITE : REQ_READ;
275 req->fd = fd;
276 req->offset = offset;
277 req->length = length;
278 req->data = SvREFCNT_inc (data);
279 req->dataptr = (char *)svptr + dataoffset;
280 req->callback = SvREFCNT_inc (callback);
281
282 send_req (req);
283}
284
285static void *
286aio_proc (void *thr_arg) 919static void *aio_proc (void *thr_arg)
287{ 920{
288 aio_req req; 921 aio_req req;
289 int type; 922 int type;
923 worker *self = (worker *)thr_arg;
290 924
291 do 925 do
292 { 926 {
293 pthread_mutex_lock (&reqlock); 927 LOCK (reqlock);
294 928
295 for (;;) 929 for (;;)
296 { 930 {
297 req = reqs; 931 self->req = req = reqq_shift (&req_queue);
298
299 if (reqs)
300 {
301 reqs = reqs->next;
302 if (!reqs) reqe = 0;
303 }
304 932
305 if (req) 933 if (req)
306 break; 934 break;
307 935
308 pthread_cond_wait (&reqwait, &reqlock); 936 pthread_cond_wait (&reqwait, &reqlock);
309 } 937 }
310 938
311 pthread_mutex_unlock (&reqlock); 939 UNLOCK (reqlock);
312 940
313 errno = 0; /* strictly unnecessary */ 941 errno = 0; /* strictly unnecessary */
942 type = req->type; /* remember type for QUIT check */
314 943
315 type = req->type; 944 if (!(req->flags & FLAG_CANCELLED))
316
317 switch (type) 945 switch (type)
318 { 946 {
319 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 947 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
320 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 948 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
321#if SYS_readahead 949
322 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 950 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
323#else 951 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
324 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
325#endif
326 952
327 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 953 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
328 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 954 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
329 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 955 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
330 956
331 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 957 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
332 case REQ_CLOSE: req->result = close (req->fd); break; 958 case REQ_CLOSE: req->result = close (req->fd); break;
333 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 959 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
334
335 case REQ_FSYNC: req->result = fsync (req->fd); break; 960 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
961 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
962 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
963 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
964
336 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 965 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
966 case REQ_FSYNC: req->result = fsync (req->fd); break;
967 case REQ_READDIR: scandir_ (req, self); break;
337 968
969 case REQ_BUSY:
970 {
971 struct timeval tv;
972
973 tv.tv_sec = req->fd;
974 tv.tv_usec = req->fd2;
975
976 req->result = select (0, 0, 0, 0, &tv);
977 }
978
979 case REQ_GROUP:
980 case REQ_NOP:
338 case REQ_QUIT: 981 case REQ_QUIT:
339 break; 982 break;
340 983
341 default: 984 default:
342 req->result = ENOSYS; 985 req->result = ENOSYS;
343 break; 986 break;
344 } 987 }
345 988
346 req->errorno = errno; 989 req->errorno = errno;
347 990
348 pthread_mutex_lock (&reslock); 991 LOCK (reslock);
349 992
350 req->next = 0; 993 if (!reqq_push (&res_queue, req))
351
352 if (rese)
353 {
354 rese->next = req;
355 rese = req;
356 }
357 else
358 {
359 rese = ress = req;
360
361 /* write a dummy byte to the pipe so fh becomes ready */ 994 /* write a dummy byte to the pipe so fh becomes ready */
362 write (respipe [1], &respipe, 1); 995 write (respipe [1], &respipe, 1);
363 }
364 996
365 pthread_mutex_unlock (&reslock); 997 self->req = 0;
998 worker_clear (self);
999
1000 UNLOCK (reslock);
366 } 1001 }
367 while (type != REQ_QUIT); 1002 while (type != REQ_QUIT);
368 1003
1004 LOCK (wrklock);
1005 worker_free (self);
1006 UNLOCK (wrklock);
1007
369 return 0; 1008 return 0;
370} 1009}
371 1010
1011/*****************************************************************************/
1012
1013static void atfork_prepare (void)
1014{
1015 LOCK (wrklock);
1016 LOCK (reqlock);
1017 LOCK (reslock);
1018#if !HAVE_PREADWRITE
1019 LOCK (preadwritelock);
1020#endif
1021#if !HAVE_READDIR_R
1022 LOCK (readdirlock);
1023#endif
1024}
1025
1026static void atfork_parent (void)
1027{
1028#if !HAVE_READDIR_R
1029 UNLOCK (readdirlock);
1030#endif
1031#if !HAVE_PREADWRITE
1032 UNLOCK (preadwritelock);
1033#endif
1034 UNLOCK (reslock);
1035 UNLOCK (reqlock);
1036 UNLOCK (wrklock);
1037}
1038
1039static void atfork_child (void)
1040{
1041 aio_req prv;
1042
1043 while (prv = reqq_shift (&req_queue))
1044 req_free (prv);
1045
1046 while (prv = reqq_shift (&res_queue))
1047 req_free (prv);
1048
1049 while (wrk_first.next != &wrk_first)
1050 {
1051 worker *wrk = wrk_first.next;
1052
1053 if (wrk->req)
1054 req_free (wrk->req);
1055
1056 worker_clear (wrk);
1057 worker_free (wrk);
1058 }
1059
1060 started = 0;
1061 nreqs = 0;
1062
1063 close (respipe [0]);
1064 close (respipe [1]);
1065 create_pipe ();
1066
1067 atfork_parent ();
1068}
1069
1070#define dREQ \
1071 aio_req req; \
1072 int req_pri = next_pri; \
1073 next_pri = DEFAULT_PRI + PRI_BIAS; \
1074 \
1075 if (SvOK (callback) && !SvROK (callback)) \
1076 croak ("callback must be undef or of reference type"); \
1077 \
1078 Newz (0, req, 1, aio_cb); \
1079 if (!req) \
1080 croak ("out of memory during aio_req allocation"); \
1081 \
1082 req->callback = newSVsv (callback); \
1083 req->pri = req_pri
1084
1085#define REQ_SEND \
1086 req_send (req); \
1087 \
1088 if (GIMME_V != G_VOID) \
1089 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1090
372MODULE = IO::AIO PACKAGE = IO::AIO 1091MODULE = IO::AIO PACKAGE = IO::AIO
373 1092
374PROTOTYPES: ENABLE 1093PROTOTYPES: ENABLE
375 1094
376BOOT: 1095BOOT:
377{ 1096{
378 if (pipe (respipe)) 1097 HV *stash = gv_stashpv ("IO::AIO", 1);
379 croak ("unable to initialize result pipe"); 1098 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1099 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1100 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
380 1101
381 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1102 create_pipe ();
382 croak ("cannot set result pipe to nonblocking mode"); 1103 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
383
384 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
385 croak ("cannot set result pipe to nonblocking mode");
386} 1104}
387 1105
388void 1106void
389min_parallel(nthreads) 1107min_parallel (nthreads)
390 int nthreads 1108 int nthreads
391 PROTOTYPE: $ 1109 PROTOTYPE: $
392 CODE:
393 while (nthreads > started)
394 start_thread ();
395 1110
396void 1111void
397max_parallel(nthreads) 1112max_parallel (nthreads)
398 int nthreads 1113 int nthreads
399 PROTOTYPE: $ 1114 PROTOTYPE: $
400 CODE:
401{
402 int cur = started;
403 while (cur > nthreads)
404 {
405 end_thread ();
406 cur--;
407 }
408 1115
409 while (started > nthreads)
410 {
411 poll_wait ();
412 poll_cb ();
413 }
414}
415
416int
417max_outstanding(nreqs)
418 int nreqs
419 PROTOTYPE: $
420 CODE:
421 RETVAL = max_outstanding;
422 max_outstanding = nreqs;
423
424void 1116void
425aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1117aio_open (pathname,flags,mode,callback=&PL_sv_undef)
426 SV * pathname 1118 SV * pathname
427 int flags 1119 int flags
428 int mode 1120 int mode
429 SV * callback 1121 SV * callback
430 PROTOTYPE: $$$;$ 1122 PROTOTYPE: $$$;$
431 CODE: 1123 PPCODE:
432{ 1124{
433 aio_req req; 1125 dREQ;
434
435 Newz (0, req, 1, aio_cb);
436
437 if (!req)
438 croak ("out of memory during aio_req allocation");
439 1126
440 req->type = REQ_OPEN; 1127 req->type = REQ_OPEN;
441 req->data = newSVsv (pathname); 1128 req->data = newSVsv (pathname);
442 req->dataptr = SvPV_nolen (req->data); 1129 req->dataptr = SvPVbyte_nolen (req->data);
443 req->fd = flags; 1130 req->fd = flags;
444 req->mode = mode; 1131 req->mode = mode;
445 req->callback = SvREFCNT_inc (callback);
446 1132
447 send_req (req); 1133 REQ_SEND;
448} 1134}
449 1135
450void 1136void
451aio_close(fh,callback=&PL_sv_undef) 1137aio_close (fh,callback=&PL_sv_undef)
452 InputStream fh 1138 SV * fh
453 SV * callback 1139 SV * callback
454 PROTOTYPE: $;$ 1140 PROTOTYPE: $;$
455 ALIAS: 1141 ALIAS:
456 aio_close = REQ_CLOSE 1142 aio_close = REQ_CLOSE
457 aio_fsync = REQ_FSYNC 1143 aio_fsync = REQ_FSYNC
458 aio_fdatasync = REQ_FDATASYNC 1144 aio_fdatasync = REQ_FDATASYNC
459 CODE: 1145 PPCODE:
1146{
1147 dREQ;
1148
1149 req->type = ix;
1150 req->fh = newSVsv (fh);
1151 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1152
1153 REQ_SEND (req);
1154}
1155
1156void
1157aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1158 SV * fh
1159 UV offset
1160 UV length
1161 SV * data
1162 UV dataoffset
1163 SV * callback
1164 ALIAS:
1165 aio_read = REQ_READ
1166 aio_write = REQ_WRITE
1167 PROTOTYPE: $$$$$;$
1168 PPCODE:
460{ 1169{
461 aio_req req; 1170 aio_req req;
1171 STRLEN svlen;
1172 char *svptr = SvPVbyte (data, svlen);
462 1173
463 Newz (0, req, 1, aio_cb); 1174 SvUPGRADE (data, SVt_PV);
1175 SvPOK_on (data);
464 1176
465 if (!req) 1177 if (dataoffset < 0)
466 croak ("out of memory during aio_req allocation"); 1178 dataoffset += svlen;
467 1179
468 req->type = ix; 1180 if (dataoffset < 0 || dataoffset > svlen)
469 req->fd = PerlIO_fileno (fh); 1181 croak ("data offset outside of string");
470 req->callback = SvREFCNT_inc (callback);
471 1182
472 send_req (req); 1183 if (ix == REQ_WRITE)
473} 1184 {
474 1185 /* write: check length and adjust. */
475void 1186 if (length < 0 || length + dataoffset > svlen)
476aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1187 length = svlen - dataoffset;
477 InputStream fh 1188 }
478 UV offset 1189 else
479 IV length 1190 {
480 SV * data 1191 /* read: grow scalar as necessary */
481 IV dataoffset 1192 svptr = SvGROW (data, length + dataoffset);
482 SV * callback 1193 }
483 PROTOTYPE: $$$$$;$
484 CODE:
485 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
486
487void
488aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
489 OutputStream fh
490 UV offset
491 IV length
492 SV * data
493 IV dataoffset
494 SV * callback
495 PROTOTYPE: $$$$$;$
496 CODE:
497 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
498
499void
500aio_readahead(fh,offset,length,callback=&PL_sv_undef)
501 InputStream fh
502 UV offset
503 IV length
504 SV * callback
505 PROTOTYPE: $$$;$
506 CODE:
507{
508 aio_req req;
509 1194
510 if (length < 0) 1195 if (length < 0)
511 croak ("length must not be negative"); 1196 croak ("length must not be negative");
512 1197
513 Newz (0, req, 1, aio_cb); 1198 {
1199 dREQ;
514 1200
515 if (!req) 1201 req->type = ix;
516 croak ("out of memory during aio_req allocation"); 1202 req->fh = newSVsv (fh);
1203 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1204 : IoOFP (sv_2io (fh)));
1205 req->offset = offset;
1206 req->length = length;
1207 req->data = SvREFCNT_inc (data);
1208 req->dataptr = (char *)svptr + dataoffset;
1209
1210 if (!SvREADONLY (data))
1211 {
1212 SvREADONLY_on (data);
1213 req->data2ptr = (void *)data;
1214 }
1215
1216 REQ_SEND;
1217 }
1218}
1219
1220void
1221aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1222 SV * out_fh
1223 SV * in_fh
1224 UV in_offset
1225 UV length
1226 SV * callback
1227 PROTOTYPE: $$$$;$
1228 PPCODE:
1229{
1230 dREQ;
1231
1232 req->type = REQ_SENDFILE;
1233 req->fh = newSVsv (out_fh);
1234 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1235 req->fh2 = newSVsv (in_fh);
1236 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1237 req->offset = in_offset;
1238 req->length = length;
1239
1240 REQ_SEND;
1241}
1242
1243void
1244aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1245 SV * fh
1246 UV offset
1247 IV length
1248 SV * callback
1249 PROTOTYPE: $$$;$
1250 PPCODE:
1251{
1252 dREQ;
517 1253
518 req->type = REQ_READAHEAD; 1254 req->type = REQ_READAHEAD;
1255 req->fh = newSVsv (fh);
519 req->fd = PerlIO_fileno (fh); 1256 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
520 req->offset = offset; 1257 req->offset = offset;
521 req->length = length; 1258 req->length = length;
522 req->callback = SvREFCNT_inc (callback);
523 1259
524 send_req (req); 1260 REQ_SEND;
525} 1261}
526 1262
527void 1263void
528aio_stat(fh_or_path,callback=&PL_sv_undef) 1264aio_stat (fh_or_path,callback=&PL_sv_undef)
529 SV * fh_or_path 1265 SV * fh_or_path
530 SV * callback 1266 SV * callback
531 ALIAS: 1267 ALIAS:
532 aio_stat = REQ_STAT 1268 aio_stat = REQ_STAT
533 aio_lstat = REQ_LSTAT 1269 aio_lstat = REQ_LSTAT
534 CODE: 1270 PPCODE:
535{ 1271{
536 aio_req req; 1272 dREQ;
537
538 Newz (0, req, 1, aio_cb);
539
540 if (!req)
541 croak ("out of memory during aio_req allocation");
542 1273
543 New (0, req->statdata, 1, Stat_t); 1274 New (0, req->statdata, 1, Stat_t);
544
545 if (!req->statdata) 1275 if (!req->statdata)
1276 {
1277 req_free (req);
546 croak ("out of memory during aio_req->statdata allocation"); 1278 croak ("out of memory during aio_req->statdata allocation");
1279 }
547 1280
548 if (SvPOK (fh_or_path)) 1281 if (SvPOK (fh_or_path))
549 { 1282 {
550 req->type = ix; 1283 req->type = ix;
551 req->data = newSVsv (fh_or_path); 1284 req->data = newSVsv (fh_or_path);
552 req->dataptr = SvPV_nolen (req->data); 1285 req->dataptr = SvPVbyte_nolen (req->data);
553 } 1286 }
554 else 1287 else
555 { 1288 {
556 req->type = REQ_FSTAT; 1289 req->type = REQ_FSTAT;
1290 req->fh = newSVsv (fh_or_path);
557 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1291 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
558 } 1292 }
559 1293
560 req->callback = SvREFCNT_inc (callback); 1294 REQ_SEND;
561
562 send_req (req);
563} 1295}
564 1296
565void 1297void
566aio_unlink(pathname,callback=&PL_sv_undef) 1298aio_unlink (pathname,callback=&PL_sv_undef)
567 SV * pathname 1299 SV * pathname
568 SV * callback 1300 SV * callback
1301 ALIAS:
1302 aio_unlink = REQ_UNLINK
1303 aio_rmdir = REQ_RMDIR
1304 aio_readdir = REQ_READDIR
569 CODE: 1305 PPCODE:
570{ 1306{
571 aio_req req; 1307 dREQ;
572 1308
573 Newz (0, req, 1, aio_cb); 1309 req->type = ix;
1310 req->data = newSVsv (pathname);
1311 req->dataptr = SvPVbyte_nolen (req->data);
574 1312
575 if (!req) 1313 REQ_SEND;
576 croak ("out of memory during aio_req allocation"); 1314}
1315
1316void
1317aio_link (oldpath,newpath,callback=&PL_sv_undef)
1318 SV * oldpath
1319 SV * newpath
1320 SV * callback
1321 ALIAS:
1322 aio_link = REQ_LINK
1323 aio_symlink = REQ_SYMLINK
1324 aio_rename = REQ_RENAME
1325 PPCODE:
1326{
1327 dREQ;
577 1328
578 req->type = REQ_UNLINK; 1329 req->type = ix;
1330 req->fh = newSVsv (oldpath);
1331 req->data2ptr = SvPVbyte_nolen (req->fh);
579 req->data = newSVsv (pathname); 1332 req->data = newSVsv (newpath);
580 req->dataptr = SvPV_nolen (req->data); 1333 req->dataptr = SvPVbyte_nolen (req->data);
581 req->callback = SvREFCNT_inc (callback);
582 1334
583 send_req (req); 1335 REQ_SEND;
584} 1336}
585 1337
586void 1338void
1339aio_busy (delay,callback=&PL_sv_undef)
1340 double delay
1341 SV * callback
1342 PPCODE:
1343{
1344 dREQ;
1345
1346 req->type = REQ_BUSY;
1347 req->fd = delay < 0. ? 0 : delay;
1348 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1349
1350 REQ_SEND;
1351}
1352
1353void
1354aio_group (callback=&PL_sv_undef)
1355 SV * callback
1356 PROTOTYPE: ;$
1357 PPCODE:
1358{
1359 dREQ;
1360
1361 req->type = REQ_GROUP;
1362 req_send (req);
1363
1364 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1365}
1366
1367void
1368aio_nop (callback=&PL_sv_undef)
1369 SV * callback
1370 PPCODE:
1371{
1372 dREQ;
1373
1374 req->type = REQ_NOP;
1375
1376 REQ_SEND;
1377}
1378
1379void
1380aioreq_pri (int pri = DEFAULT_PRI)
1381 CODE:
1382 if (pri < PRI_MIN) pri = PRI_MIN;
1383 if (pri > PRI_MAX) pri = PRI_MAX;
1384 next_pri = pri + PRI_BIAS;
1385
1386void
1387aioreq_nice (int nice = 0)
1388 CODE:
1389 nice = next_pri - nice;
1390 if (nice < PRI_MIN) nice = PRI_MIN;
1391 if (nice > PRI_MAX) nice = PRI_MAX;
1392 next_pri = nice + PRI_BIAS;
1393
1394void
587flush() 1395flush ()
588 PROTOTYPE: 1396 PROTOTYPE:
589 CODE: 1397 CODE:
590 while (nreqs) 1398 while (nreqs)
591 { 1399 {
592 poll_wait (); 1400 poll_wait ();
593 poll_cb (); 1401 poll_cb (0);
594 } 1402 }
595 1403
596void 1404void
597poll() 1405poll()
598 PROTOTYPE: 1406 PROTOTYPE:
599 CODE: 1407 CODE:
600 if (nreqs) 1408 if (nreqs)
601 { 1409 {
602 poll_wait (); 1410 poll_wait ();
603 poll_cb (); 1411 poll_cb (0);
604 } 1412 }
605 1413
606int 1414int
607poll_fileno() 1415poll_fileno()
608 PROTOTYPE: 1416 PROTOTYPE:
… …
613 1421
614int 1422int
615poll_cb(...) 1423poll_cb(...)
616 PROTOTYPE: 1424 PROTOTYPE:
617 CODE: 1425 CODE:
618 RETVAL = poll_cb (); 1426 RETVAL = poll_cb (0);
1427 OUTPUT:
1428 RETVAL
1429
1430int
1431poll_some(int max = 0)
1432 PROTOTYPE: $
1433 CODE:
1434 RETVAL = poll_cb (max);
619 OUTPUT: 1435 OUTPUT:
620 RETVAL 1436 RETVAL
621 1437
622void 1438void
623poll_wait() 1439poll_wait()
… …
632 CODE: 1448 CODE:
633 RETVAL = nreqs; 1449 RETVAL = nreqs;
634 OUTPUT: 1450 OUTPUT:
635 RETVAL 1451 RETVAL
636 1452
1453PROTOTYPES: DISABLE
1454
1455MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1456
1457void
1458cancel (aio_req_ornot req)
1459 CODE:
1460 req_cancel (req);
1461
1462void
1463cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1464 CODE:
1465 SvREFCNT_dec (req->callback);
1466 req->callback = newSVsv (callback);
1467
1468MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1469
1470void
1471add (aio_req grp, ...)
1472 PPCODE:
1473{
1474 int i;
1475 aio_req req;
1476
1477 if (grp->fd == 2)
1478 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1479
1480 for (i = 1; i < items; ++i )
1481 {
1482 if (GIMME_V != G_VOID)
1483 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1484
1485 req = SvAIO_REQ (ST (i));
1486
1487 if (req)
1488 {
1489 ++grp->length;
1490 req->grp = grp;
1491
1492 req->grp_prev = 0;
1493 req->grp_next = grp->grp_first;
1494
1495 if (grp->grp_first)
1496 grp->grp_first->grp_prev = req;
1497
1498 grp->grp_first = req;
1499 }
1500 }
1501}
1502
1503void
1504cancel_subs (aio_req_ornot req)
1505 CODE:
1506 req_cancel_subs (req);
1507
1508void
1509result (aio_req grp, ...)
1510 CODE:
1511{
1512 int i;
1513 AV *av = newAV ();
1514
1515 for (i = 1; i < items; ++i )
1516 av_push (av, newSVsv (ST (i)));
1517
1518 SvREFCNT_dec (grp->data);
1519 grp->data = (SV *)av;
1520}
1521
1522void
1523limit (aio_req grp, int limit)
1524 CODE:
1525 grp->fd2 = limit;
1526 aio_grp_feed (grp);
1527
1528void
1529feed (aio_req grp, SV *callback=&PL_sv_undef)
1530 CODE:
1531{
1532 SvREFCNT_dec (grp->fh2);
1533 grp->fh2 = newSVsv (callback);
1534
1535 if (grp->fd2 <= 0)
1536 grp->fd2 = 2;
1537
1538 aio_grp_feed (grp);
1539}
1540

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