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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 1.80 by root, Fri Oct 27 19:17:23 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/* used for struct dirent, AIX doesn't provide it */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49#ifndef NAME_MAX
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 50# define NAME_MAX 4096
51#endif
21 52
22#if __i386 || __amd64 53#ifndef PTHREAD_STACK_MIN
23# define STACKSIZE ( 256 * sizeof (long)) 54/* care for broken platforms, e.g. windows */
55# define PTHREAD_STACK_MIN 16384
56#endif
57
24#elif __ia64 58#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 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 ( 512 * sizeof (long)) 63# define STACKSIZE 16384
64#endif
65
66/* wether word reads are potentially non-atomic.
67 * this is conservatice, likely most arches this runs
68 * on have atomic word read/writes.
69 */
70#ifndef WORDREAD_UNSAFE
71# if __i386 || __x86_64
72# define WORDREAD_UNSAFE 0
73# else
74# define WORDREAD_UNSAFE 1
28#endif 75# endif
76#endif
77
78/* buffer size for various temporary buffers */
79#define AIO_BUFSIZE 65536
80
81#define dBUF \
82 char *aio_buf; \
83 LOCK (wrklock); \
84 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
85 UNLOCK (wrklock); \
86 if (!aio_buf) \
87 return -1;
29 88
30enum { 89enum {
31 REQ_QUIT, 90 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 91 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 92 REQ_READ, REQ_WRITE, REQ_READAHEAD,
93 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 94 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 95 REQ_FSYNC, REQ_FDATASYNC,
96 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
97 REQ_READDIR,
98 REQ_LINK, REQ_SYMLINK,
99 REQ_GROUP, REQ_NOP,
100 REQ_BUSY,
36}; 101};
37 102
103#define AIO_REQ_KLASS "IO::AIO::REQ"
104#define AIO_GRP_KLASS "IO::AIO::GRP"
105
38typedef struct aio_cb { 106typedef struct aio_cb
107{
39 struct aio_cb *next; 108 struct aio_cb *volatile next;
40 109
41 int type; 110 SV *data, *callback;
42 111 SV *fh, *fh2;
43 int fd; 112 void *dataptr, *data2ptr;
113 Stat_t *statdata;
44 off_t offset; 114 off_t offset;
45 size_t length; 115 size_t length;
46 ssize_t result; 116 ssize_t result;
117
118 STRLEN dataoffset;
119 int type;
120 int fd, fd2;
121 int errorno;
47 mode_t mode; /* open */ 122 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 123
53 Stat_t *statdata; 124 unsigned char flags;
125 unsigned char pri;
126
127 SV *self; /* the perl counterpart of this request, if any */
128 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 129} aio_cb;
55 130
131enum {
132 FLAG_CANCELLED = 0x01,
133};
134
56typedef aio_cb *aio_req; 135typedef aio_cb *aio_req;
136typedef aio_cb *aio_req_ornot;
57 137
58static int started; 138enum {
59static int nreqs; 139 PRI_MIN = -4,
140 PRI_MAX = 4,
141
142 DEFAULT_PRI = 0,
143 PRI_BIAS = -PRI_MIN,
144 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
145};
146
147static int next_pri = DEFAULT_PRI + PRI_BIAS;
148
149static unsigned int started, wanted;
150
151#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
152# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
153#else
154# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
155#endif
156
157#define LOCK(mutex) pthread_mutex_lock (&(mutex))
158#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
159
160/* worker threads management */
161static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
162
163typedef struct worker {
164 /* locked by wrklock */
165 struct worker *prev, *next;
166
167 pthread_t tid;
168
169 /* locked by reslock, reqlock or wrklock */
170 aio_req req; /* currently processed request */
171 void *dbuf;
172 DIR *dirp;
173} worker;
174
175static worker wrk_first = { &wrk_first, &wrk_first, 0 };
176
177static void worker_clear (worker *wrk)
178{
179 if (wrk->dirp)
180 {
181 closedir (wrk->dirp);
182 wrk->dirp = 0;
183 }
184
185 if (wrk->dbuf)
186 {
187 free (wrk->dbuf);
188 wrk->dbuf = 0;
189 }
190}
191
192static void worker_free (worker *wrk)
193{
194 wrk->next->prev = wrk->prev;
195 wrk->prev->next = wrk->next;
196
197 free (wrk);
198}
199
200static volatile unsigned int nreqs, nready, npending;
201static volatile unsigned int max_outstanding = 0xffffffff;
60static int reqpipe[2], respipe[2]; 202static int respipe [2];
61 203
62static aio_req qs, qe; /* queue start, queue end */ 204static pthread_mutex_t reslock = AIO_MUTEX_INIT;
205static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
206static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
207
208#if WORDREAD_UNSAFE
209
210static unsigned int get_nready ()
211{
212 unsigned int retval;
213
214 LOCK (reqlock);
215 retval = nready;
216 UNLOCK (reqlock);
217
218 return retval;
219}
220
221static unsigned int get_npending ()
222{
223 unsigned int retval;
224
225 LOCK (reslock);
226 retval = npending;
227 UNLOCK (reslock);
228
229 return retval;
230}
231
232#else
233
234# define get_nready() nready
235# define get_npending() npending
236
237#endif
238
239/*
240 * a somewhat faster data structure might be nice, but
241 * with 8 priorities this actually needs <20 insns
242 * per shift, the most expensive operation.
243 */
244typedef struct {
245 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
246 int size;
247} reqq;
248
249static reqq req_queue;
250static reqq res_queue;
251
252int reqq_push (reqq *q, aio_req req)
253{
254 int pri = req->pri;
255 req->next = 0;
256
257 if (q->qe[pri])
258 {
259 q->qe[pri]->next = req;
260 q->qe[pri] = req;
261 }
262 else
263 q->qe[pri] = q->qs[pri] = req;
264
265 return q->size++;
266}
267
268aio_req reqq_shift (reqq *q)
269{
270 int pri;
271
272 if (!q->size)
273 return 0;
274
275 --q->size;
276
277 for (pri = NUM_PRI; pri--; )
278 {
279 aio_req req = q->qs[pri];
280
281 if (req)
282 {
283 if (!(q->qs[pri] = req->next))
284 q->qe[pri] = 0;
285
286 return req;
287 }
288 }
289
290 abort ();
291}
292
293static int poll_cb (int max);
294static void req_invoke (aio_req req);
295static void req_free (aio_req req);
296static void req_cancel (aio_req req);
297
298/* must be called at most once */
299static SV *req_sv (aio_req req, const char *klass)
300{
301 if (!req->self)
302 {
303 req->self = (SV *)newHV ();
304 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
305 }
306
307 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
308}
309
310static aio_req SvAIO_REQ (SV *sv)
311{
312 MAGIC *mg;
313
314 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
315 croak ("object of class " AIO_REQ_KLASS " expected");
316
317 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
318
319 return mg ? (aio_req)mg->mg_ptr : 0;
320}
321
322static void aio_grp_feed (aio_req grp)
323{
324 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
325 {
326 int old_len = grp->length;
327
328 if (grp->fh2 && SvOK (grp->fh2))
329 {
330 dSP;
331
332 ENTER;
333 SAVETMPS;
334 PUSHMARK (SP);
335 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
336 PUTBACK;
337 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
338 SPAGAIN;
339 FREETMPS;
340 LEAVE;
341 }
342
343 /* stop if no progress has been made */
344 if (old_len == grp->length)
345 {
346 SvREFCNT_dec (grp->fh2);
347 grp->fh2 = 0;
348 break;
349 }
350 }
351}
352
353static void aio_grp_dec (aio_req grp)
354{
355 --grp->length;
356
357 /* call feeder, if applicable */
358 aio_grp_feed (grp);
359
360 /* finish, if done */
361 if (!grp->length && grp->fd)
362 {
363 req_invoke (grp);
364 req_free (grp);
365 }
366}
367
368static void req_invoke (aio_req req)
369{
370 dSP;
371
372 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
373 {
374 ENTER;
375 SAVETMPS;
376 PUSHMARK (SP);
377 EXTEND (SP, 1);
378
379 switch (req->type)
380 {
381 case REQ_READDIR:
382 {
383 SV *rv = &PL_sv_undef;
384
385 if (req->result >= 0)
386 {
387 int i;
388 char *buf = req->data2ptr;
389 AV *av = newAV ();
390
391 av_extend (av, req->result - 1);
392
393 for (i = 0; i < req->result; ++i)
394 {
395 SV *sv = newSVpv (buf, 0);
396
397 av_store (av, i, sv);
398 buf += SvCUR (sv) + 1;
399 }
400
401 rv = sv_2mortal (newRV_noinc ((SV *)av));
402 }
403
404 PUSHs (rv);
405 }
406 break;
407
408 case REQ_OPEN:
409 {
410 /* convert fd to fh */
411 SV *fh;
412
413 PUSHs (sv_2mortal (newSViv (req->result)));
414 PUTBACK;
415 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
416 SPAGAIN;
417
418 fh = SvREFCNT_inc (POPs);
419
420 PUSHMARK (SP);
421 XPUSHs (sv_2mortal (fh));
422 }
423 break;
424
425 case REQ_GROUP:
426 req->fd = 2; /* mark group as finished */
427
428 if (req->data)
429 {
430 int i;
431 AV *av = (AV *)req->data;
432
433 EXTEND (SP, AvFILL (av) + 1);
434 for (i = 0; i <= AvFILL (av); ++i)
435 PUSHs (*av_fetch (av, i, 0));
436 }
437 break;
438
439 case REQ_NOP:
440 case REQ_BUSY:
441 break;
442
443 default:
444 PUSHs (sv_2mortal (newSViv (req->result)));
445 break;
446 }
447
448 errno = req->errorno;
449
450 PUTBACK;
451 call_sv (req->callback, G_VOID | G_EVAL);
452 SPAGAIN;
453
454 FREETMPS;
455 LEAVE;
456 }
457
458 if (req->grp)
459 {
460 aio_req grp = req->grp;
461
462 /* unlink request */
463 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
464 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
465
466 if (grp->grp_first == req)
467 grp->grp_first = req->grp_next;
468
469 aio_grp_dec (grp);
470 }
471
472 if (SvTRUE (ERRSV))
473 {
474 req_free (req);
475 croak (0);
476 }
477}
478
479static void req_free (aio_req req)
480{
481 if (req->self)
482 {
483 sv_unmagic (req->self, PERL_MAGIC_ext);
484 SvREFCNT_dec (req->self);
485 }
486
487 SvREFCNT_dec (req->data);
488 SvREFCNT_dec (req->fh);
489 SvREFCNT_dec (req->fh2);
490 SvREFCNT_dec (req->callback);
491 Safefree (req->statdata);
492
493 if (req->type == REQ_READDIR)
494 free (req->data2ptr);
495
496 Safefree (req);
497}
498
499static void req_cancel_subs (aio_req grp)
500{
501 aio_req sub;
502
503 if (grp->type != REQ_GROUP)
504 return;
505
506 SvREFCNT_dec (grp->fh2);
507 grp->fh2 = 0;
508
509 for (sub = grp->grp_first; sub; sub = sub->grp_next)
510 req_cancel (sub);
511}
512
513static void req_cancel (aio_req req)
514{
515 req->flags |= FLAG_CANCELLED;
516
517 req_cancel_subs (req);
518}
63 519
64static void *aio_proc(void *arg); 520static void *aio_proc(void *arg);
65 521
66static void
67start_thread (void) 522static void start_thread (void)
68{ 523{
69 sigset_t fullsigset, oldsigset; 524 sigset_t fullsigset, oldsigset;
70 pthread_t tid;
71 pthread_attr_t attr; 525 pthread_attr_t attr;
526
527 worker *wrk = calloc (1, sizeof (worker));
528
529 if (!wrk)
530 croak ("unable to allocate worker thread data");
72 531
73 pthread_attr_init (&attr); 532 pthread_attr_init (&attr);
74 pthread_attr_setstacksize (&attr, STACKSIZE); 533 pthread_attr_setstacksize (&attr, STACKSIZE);
75 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 534 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
535#ifdef PTHREAD_SCOPE_PROCESS
536 pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
537#endif
76 538
77 sigfillset (&fullsigset); 539 sigfillset (&fullsigset);
540
541 LOCK (wrklock);
78 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 542 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79 543
80 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 544 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
545 {
546 wrk->prev = &wrk_first;
547 wrk->next = wrk_first.next;
548 wrk_first.next->prev = wrk;
549 wrk_first.next = wrk;
81 started++; 550 ++started;
551 }
552 else
553 free (wrk);
82 554
83 sigprocmask (SIG_SETMASK, &oldsigset, 0); 555 sigprocmask (SIG_SETMASK, &oldsigset, 0);
556 UNLOCK (wrklock);
84} 557}
85 558
86static void 559static void maybe_start_thread ()
87send_reqs (void)
88{ 560{
89 /* this write is atomic */ 561#if 0
90 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) 562 static struct timeval last;
563 struct timeval diff, now;
564#endif
565
566 if (started >= wanted)
567 return;
568
569 if (nready <= nreqs - get_nready () - get_npending ())
570 return;
571
572#if 0
573 gettimeofday (&now, 0);
574
575 diff.tv_sec = now.tv_sec - last.tv_sec;
576 diff.tv_usec = now.tv_usec - last.tv_usec;
577
578 if (diff.tv_usec < 0)
91 { 579 {
92 qs = qs->next; 580 --diff.tv_sec;
93 if (!qs) qe = 0; 581 diff.tv_usec += 1000000;
94 } 582 }
95}
96 583
97static void 584 if (!diff.tv_sec && diff.tv_usec < 10000)
98send_req (aio_req req) 585 return;
586
587 last = now;
588#endif
589
590 start_thread ();
591}
592
593static void req_send (aio_req req)
99{ 594{
100 nreqs++; 595 ++nreqs;
101 req->next = 0;
102 596
103 if (qe) 597 LOCK (reqlock);
104 { 598 ++nready;
105 qe->next = req; 599 reqq_push (&req_queue, req);
106 qe = req; 600 pthread_cond_signal (&reqwait);
107 } 601 UNLOCK (reqlock);
108 else
109 qe = qs = req;
110 602
111 send_reqs (); 603 maybe_start_thread ();
112} 604}
113 605
114static void 606static void end_thread (void)
115end_thread (void)
116{ 607{
117 aio_req req; 608 aio_req req;
609
118 New (0, req, 1, aio_cb); 610 Newz (0, req, 1, aio_cb);
611
119 req->type = REQ_QUIT; 612 req->type = REQ_QUIT;
613 req->pri = PRI_MAX + PRI_BIAS;
120 614
121 send_req (req); 615 req_send (req);
122}
123 616
124static void 617 LOCK (wrklock);
125read_write (pTHX_ 618 --started;
126 int dowrite, int fd, off_t offset, size_t length, 619 UNLOCK (wrklock);
127 SV *data, STRLEN dataoffset, SV *callback)
128{
129 aio_req req;
130 STRLEN svlen;
131 char *svptr = SvPV (data, svlen);
132
133 SvUPGRADE (data, SVt_PV);
134 SvPOK_on (data);
135
136 if (dataoffset < 0)
137 dataoffset += svlen;
138
139 if (dataoffset < 0 || dataoffset > svlen)
140 croak ("data offset outside of string");
141
142 if (dowrite)
143 {
144 /* write: check length and adjust. */
145 if (length < 0 || length + dataoffset > svlen)
146 length = svlen - dataoffset;
147 }
148 else
149 {
150 /* read: grow scalar as necessary */
151 svptr = SvGROW (data, length + dataoffset);
152 }
153
154 if (length < 0)
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} 620}
172 621
173static void 622static void min_parallel (int nthreads)
174poll_wait () 623{
624 if (wanted < nthreads)
625 wanted = nthreads;
626}
627
628static void max_parallel (int nthreads)
629{
630 if (wanted > nthreads)
631 wanted = nthreads;
632
633 while (started > wanted)
634 end_thread ();
635}
636
637static void poll_wait ()
175{ 638{
176 fd_set rfd; 639 fd_set rfd;
640
641 while (nreqs)
642 {
643 int size;
644 if (WORDREAD_UNSAFE) LOCK (reslock);
645 size = res_queue.size;
646 if (WORDREAD_UNSAFE) UNLOCK (reslock);
647
648 if (size)
649 return;
650
651 maybe_start_thread ();
652
177 FD_ZERO(&rfd); 653 FD_ZERO(&rfd);
178 FD_SET(respipe[0], &rfd); 654 FD_SET(respipe [0], &rfd);
179 655
180 select (respipe[0] + 1, &rfd, 0, 0, 0); 656 select (respipe [0] + 1, &rfd, 0, 0, 0);
657 }
181} 658}
182 659
183static int 660static int poll_cb (int max)
184poll_cb (pTHX)
185{ 661{
186 dSP; 662 dSP;
187 int count = 0; 663 int count = 0;
664 int do_croak = 0;
188 aio_req req; 665 aio_req req;
189 666
190 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 667 for (;;)
191 { 668 {
192 nreqs--; 669 while (max <= 0 || count < max)
193
194 if (req->type == REQ_QUIT)
195 started--;
196 else
197 { 670 {
198 int errorno = errno; 671 maybe_start_thread ();
199 errno = req->errorno;
200 672
201 if (req->type == REQ_READ) 673 LOCK (reslock);
202 SvCUR_set (req->data, req->dataoffset 674 req = reqq_shift (&res_queue);
203 + req->result > 0 ? req->result : 0);
204 675
205 if (req->data) 676 if (req)
206 SvREFCNT_dec (req->data);
207
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209 { 677 {
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 678 --npending;
211 PL_laststatval = req->result;
212 PL_statcache = *(req->statdata);
213 679
214 Safefree (req->statdata); 680 if (!res_queue.size)
681 {
682 /* read any signals sent by the worker threads */
683 char buf [32];
684 while (read (respipe [0], buf, 32) == 32)
685 ;
686 }
215 } 687 }
216 688
217 PUSHMARK (SP); 689 UNLOCK (reslock);
218 XPUSHs (sv_2mortal (newSViv (req->result)));
219 690
691 if (!req)
692 break;
693
694 --nreqs;
695
220 if (req->type == REQ_OPEN) 696 if (req->type == REQ_GROUP && req->length)
221 { 697 {
222 /* convert fd to fh */ 698 req->fd = 1; /* mark request as delayed */
223 SV *fh; 699 continue;
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 } 700 }
701 else
702 {
703 if (req->type == REQ_READ)
704 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
234 705
235 PUTBACK; 706 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
236 call_sv (req->callback, G_VOID | G_EVAL); 707 SvREADONLY_off (req->data);
237 SPAGAIN; 708
709 if (req->statdata)
710 {
711 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
712 PL_laststatval = req->result;
713 PL_statcache = *(req->statdata);
714 }
715
716 req_invoke (req);
717
718 count++;
719 }
720
721 req_free (req);
722 }
723
724 if (nreqs <= max_outstanding)
725 break;
726
727 poll_wait ();
728
729 max = 0;
730 }
731
732 return count;
733}
734
735static void create_pipe ()
736{
737 if (pipe (respipe))
738 croak ("unable to initialize result pipe");
739
740 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
741 croak ("cannot set result pipe to nonblocking mode");
742
743 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
744 croak ("cannot set result pipe to nonblocking mode");
745}
746
747/*****************************************************************************/
748/* work around various missing functions */
749
750#if !HAVE_PREADWRITE
751# define pread aio_pread
752# define pwrite aio_pwrite
753
754/*
755 * make our pread/pwrite safe against themselves, but not against
756 * normal read/write by using a mutex. slows down execution a lot,
757 * but that's your problem, not mine.
758 */
759static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
760
761static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
762{
763 ssize_t res;
764 off_t ooffset;
765
766 LOCK (preadwritelock);
767 ooffset = lseek (fd, 0, SEEK_CUR);
768 lseek (fd, offset, SEEK_SET);
769 res = read (fd, buf, count);
770 lseek (fd, ooffset, SEEK_SET);
771 UNLOCK (preadwritelock);
772
773 return res;
774}
775
776static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
777{
778 ssize_t res;
779 off_t ooffset;
780
781 LOCK (preadwritelock);
782 ooffset = lseek (fd, 0, SEEK_CUR);
783 lseek (fd, offset, SEEK_SET);
784 res = write (fd, buf, count);
785 lseek (fd, offset, SEEK_SET);
786 UNLOCK (preadwritelock);
787
788 return res;
789}
790#endif
791
792#if !HAVE_FDATASYNC
793# define fdatasync fsync
794#endif
795
796#if !HAVE_READAHEAD
797# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
798
799static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
800{
801 dBUF;
802
803 while (count > 0)
804 {
805 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
806
807 pread (fd, aio_buf, len, offset);
808 offset += len;
809 count -= len;
810 }
811
812 errno = 0;
813}
814
815#endif
816
817#if !HAVE_READDIR_R
818# define readdir_r aio_readdir_r
819
820static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
821
822static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
823{
824 struct dirent *e;
825 int errorno;
826
827 LOCK (readdirlock);
828
829 e = readdir (dirp);
830 errorno = errno;
831
832 if (e)
833 {
834 *res = ent;
835 strcpy (ent->d_name, e->d_name);
836 }
837 else
838 *res = 0;
839
840 UNLOCK (readdirlock);
841
842 errno = errorno;
843 return e ? 0 : -1;
844}
845#endif
846
847/* sendfile always needs emulation */
848static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
849{
850 ssize_t res;
851
852 if (!count)
853 return 0;
854
855#if HAVE_SENDFILE
856# if __linux
857 res = sendfile (ofd, ifd, &offset, count);
858
859# elif __freebsd
860 /*
861 * Of course, the freebsd sendfile is a dire hack with no thoughts
862 * wasted on making it similar to other I/O functions.
863 */
864 {
865 off_t sbytes;
866 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
867
868 if (res < 0 && sbytes)
869 /* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
870 res = sbytes;
871 }
872
873# elif __hpux
874 res = sendfile (ofd, ifd, offset, count, 0, 0);
875
876# elif __solaris
877 {
878 struct sendfilevec vec;
879 size_t sbytes;
880
881 vec.sfv_fd = ifd;
882 vec.sfv_flag = 0;
883 vec.sfv_off = offset;
884 vec.sfv_len = count;
885
886 res = sendfilev (ofd, &vec, 1, &sbytes);
887
888 if (res < 0 && sbytes)
889 res = sbytes;
890 }
891
892# endif
893#else
894 res = -1;
895 errno = ENOSYS;
896#endif
897
898 if (res < 0
899 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
900#if __solaris
901 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
902#endif
903 )
904 )
905 {
906 /* emulate sendfile. this is a major pain in the ass */
907 dBUF;
908
909 res = 0;
910
911 while (count)
912 {
913 ssize_t cnt;
238 914
239 if (req->callback) 915 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
240 SvREFCNT_dec (req->callback);
241 916
242 errno = errorno; 917 if (cnt <= 0)
918 {
919 if (cnt && !res) res = -1;
920 break;
921 }
922
923 cnt = write (ofd, aio_buf, cnt);
924
925 if (cnt <= 0)
926 {
927 if (cnt && !res) res = -1;
928 break;
929 }
930
931 offset += cnt;
932 res += cnt;
243 count++; 933 count -= cnt;
244 } 934 }
935 }
245 936
246 Safefree (req); 937 return res;
938}
939
940/* read a full directory */
941static void scandir_ (aio_req req, worker *self)
942{
943 DIR *dirp;
944 union
945 {
946 struct dirent d;
947 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
948 } *u;
949 struct dirent *entp;
950 char *name, *names;
951 int memlen = 4096;
952 int memofs = 0;
953 int res = 0;
954 int errorno;
955
956 LOCK (wrklock);
957 self->dirp = dirp = opendir (req->dataptr);
958 self->dbuf = u = malloc (sizeof (*u));
959 req->data2ptr = names = malloc (memlen);
960 UNLOCK (wrklock);
961
962 if (dirp && u && names)
963 for (;;)
964 {
965 errno = 0;
966 readdir_r (dirp, &u->d, &entp);
967
968 if (!entp)
969 break;
970
971 name = entp->d_name;
972
973 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
974 {
975 int len = strlen (name) + 1;
976
977 res++;
978
979 while (memofs + len > memlen)
980 {
981 memlen *= 2;
982 LOCK (wrklock);
983 req->data2ptr = names = realloc (names, memlen);
984 UNLOCK (wrklock);
985
986 if (!names)
987 break;
988 }
989
990 memcpy (names + memofs, name, len);
991 memofs += len;
992 }
247 } 993 }
248 994
249 if (qs) 995 if (errno)
250 send_reqs (); 996 res = -1;
251 997
252 return count; 998 req->result = res;
253} 999}
254 1000
255static void * 1001/*****************************************************************************/
1002
256aio_proc (void *thr_arg) 1003static void *aio_proc (void *thr_arg)
257{ 1004{
258 aio_req req; 1005 aio_req req;
1006 worker *self = (worker *)thr_arg;
259 1007
260 /* then loop */ 1008 for (;;)
261 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 1009 {
1010 LOCK (reqlock);
1011
1012 for (;;)
1013 {
1014 self->req = req = reqq_shift (&req_queue);
1015
1016 if (req)
1017 break;
1018
1019 pthread_cond_wait (&reqwait, &reqlock);
1020 }
1021
1022 --nready;
1023
1024 UNLOCK (reqlock);
262 { 1025
263 errno = 0; /* strictly unnecessary */ 1026 errno = 0; /* strictly unnecessary */
264 1027
1028 if (!(req->flags & FLAG_CANCELLED))
265 switch (req->type) 1029 switch (req->type)
266 { 1030 {
267 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 1031 case REQ_READ: req->result = pread (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; 1032 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
269#if SYS_readahead 1033
270 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 1034 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
271#else 1035 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
272 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
273#endif
274 1036
275 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 1037 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
276 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 1038 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
277 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 1039 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
278 1040
279 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 1041 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
280 case REQ_CLOSE: req->result = close (req->fd); break; 1042 case REQ_CLOSE: req->result = close (req->fd); break;
281 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 1043 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
282
283 case REQ_FSYNC: req->result = fsync (req->fd); break; 1044 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1045 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1046 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1047 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1048
284 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 1049 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1050 case REQ_FSYNC: req->result = fsync (req->fd); break;
1051 case REQ_READDIR: scandir_ (req, self); break;
285 1052
1053 case REQ_BUSY:
1054 {
1055 struct timeval tv;
1056
1057 tv.tv_sec = req->fd;
1058 tv.tv_usec = req->fd2;
1059
1060 req->result = select (0, 0, 0, 0, &tv);
1061 }
1062
1063 case REQ_GROUP:
1064 case REQ_NOP:
1065 break;
1066
286 case REQ_QUIT: 1067 case REQ_QUIT:
287 write (respipe[1], (void *)&req, sizeof (req)); 1068 LOCK (wrklock);
288 return 0; 1069 worker_free (self);
1070 --started;
1071 UNLOCK (wrklock);
1072 return 0;
289 1073
290 default: 1074 default:
291 req->result = ENOSYS; 1075 req->result = ENOSYS;
292 break; 1076 break;
293 } 1077 }
294 1078
295 req->errorno = errno; 1079 req->errorno = errno;
296 write (respipe[1], (void *)&req, sizeof (req)); 1080
1081 LOCK (reslock);
1082
1083 ++npending;
1084
1085 if (!reqq_push (&res_queue, req))
1086 /* write a dummy byte to the pipe so fh becomes ready */
1087 write (respipe [1], &respipe, 1);
1088
1089 self->req = 0;
1090 worker_clear (self);
1091
1092 UNLOCK (reslock);
1093 }
1094}
1095
1096/*****************************************************************************/
1097
1098static void atfork_prepare (void)
1099{
1100 LOCK (wrklock);
1101 LOCK (reqlock);
1102 LOCK (reslock);
1103#if !HAVE_PREADWRITE
1104 LOCK (preadwritelock);
1105#endif
1106#if !HAVE_READDIR_R
1107 LOCK (readdirlock);
1108#endif
1109}
1110
1111static void atfork_parent (void)
1112{
1113#if !HAVE_READDIR_R
1114 UNLOCK (readdirlock);
1115#endif
1116#if !HAVE_PREADWRITE
1117 UNLOCK (preadwritelock);
1118#endif
1119 UNLOCK (reslock);
1120 UNLOCK (reqlock);
1121 UNLOCK (wrklock);
1122}
1123
1124static void atfork_child (void)
1125{
1126 aio_req prv;
1127
1128 while (prv = reqq_shift (&req_queue))
1129 req_free (prv);
1130
1131 while (prv = reqq_shift (&res_queue))
1132 req_free (prv);
1133
1134 while (wrk_first.next != &wrk_first)
297 } 1135 {
1136 worker *wrk = wrk_first.next;
298 1137
299 return 0; 1138 if (wrk->req)
300} 1139 req_free (wrk->req);
301 1140
1141 worker_clear (wrk);
1142 worker_free (wrk);
1143 }
1144
1145 started = 0;
1146 nreqs = 0;
1147
1148 close (respipe [0]);
1149 close (respipe [1]);
1150 create_pipe ();
1151
1152 atfork_parent ();
1153}
1154
1155#define dREQ \
1156 aio_req req; \
1157 int req_pri = next_pri; \
1158 next_pri = DEFAULT_PRI + PRI_BIAS; \
1159 \
1160 if (SvOK (callback) && !SvROK (callback)) \
1161 croak ("callback must be undef or of reference type"); \
1162 \
1163 Newz (0, req, 1, aio_cb); \
1164 if (!req) \
1165 croak ("out of memory during aio_req allocation"); \
1166 \
1167 req->callback = newSVsv (callback); \
1168 req->pri = req_pri
1169
1170#define REQ_SEND \
1171 req_send (req); \
1172 \
1173 if (GIMME_V != G_VOID) \
1174 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1175
302MODULE = IO::AIO PACKAGE = IO::AIO 1176MODULE = IO::AIO PACKAGE = IO::AIO
303 1177
1178PROTOTYPES: ENABLE
1179
304BOOT: 1180BOOT:
305{ 1181{
306 if (pipe (reqpipe) || pipe (respipe)) 1182 HV *stash = gv_stashpv ("IO::AIO", 1);
307 croak ("unable to initialize request or result pipe"); 1183 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1184 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1185 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
308 1186
309 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) 1187 create_pipe ();
310 croak ("cannot set result pipe to nonblocking mode"); 1188 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
311 1189
312 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) 1190 start_thread ();
313 croak ("cannot set result pipe to nonblocking mode");
314} 1191}
315 1192
316void 1193void
317min_parallel(nthreads) 1194min_parallel (int nthreads)
318 int nthreads 1195 PROTOTYPE: $
1196
1197void
1198max_parallel (int nthreads)
1199 PROTOTYPE: $
1200
1201int
1202max_outstanding (int maxreqs)
319 PROTOTYPE: $ 1203 PROTOTYPE: $
320 CODE: 1204 CODE:
321 while (nthreads > started) 1205 RETVAL = max_outstanding;
322 start_thread (); 1206 max_outstanding = maxreqs;
1207 OUTPUT:
1208 RETVAL
323 1209
324void 1210void
325max_parallel(nthreads)
326 int nthreads
327 PROTOTYPE: $
328 CODE:
329{
330 int cur = started;
331 while (cur > nthreads)
332 {
333 end_thread ();
334 cur--;
335 }
336
337 while (started > nthreads)
338 {
339 poll_wait ();
340 poll_cb (aTHX);
341 }
342}
343
344void
345aio_open(pathname,flags,mode,callback) 1211aio_open (pathname,flags,mode,callback=&PL_sv_undef)
346 SV * pathname 1212 SV * pathname
347 int flags 1213 int flags
348 int mode 1214 int mode
349 SV * callback 1215 SV * callback
350 PROTOTYPE: $$$$ 1216 PROTOTYPE: $$$;$
351 CODE: 1217 PPCODE:
352{ 1218{
353 aio_req req; 1219 dREQ;
354
355 Newz (0, req, 1, aio_cb);
356
357 if (!req)
358 croak ("out of memory during aio_req allocation");
359 1220
360 req->type = REQ_OPEN; 1221 req->type = REQ_OPEN;
361 req->data = newSVsv (pathname); 1222 req->data = newSVsv (pathname);
362 req->dataptr = SvPV_nolen (req->data); 1223 req->dataptr = SvPVbyte_nolen (req->data);
363 req->fd = flags; 1224 req->fd = flags;
364 req->mode = mode; 1225 req->mode = mode;
365 req->callback = SvREFCNT_inc (callback);
366 1226
367 send_req (req); 1227 REQ_SEND;
368} 1228}
369 1229
370void 1230void
371aio_close(fh,callback) 1231aio_close (fh,callback=&PL_sv_undef)
372 InputStream fh 1232 SV * fh
373 SV * callback 1233 SV * callback
374 PROTOTYPE: $$ 1234 PROTOTYPE: $;$
375 ALIAS: 1235 ALIAS:
376 aio_close = REQ_CLOSE 1236 aio_close = REQ_CLOSE
377 aio_fsync = REQ_FSYNC 1237 aio_fsync = REQ_FSYNC
378 aio_fdatasync = REQ_FDATASYNC 1238 aio_fdatasync = REQ_FDATASYNC
379 CODE: 1239 PPCODE:
1240{
1241 dREQ;
1242
1243 req->type = ix;
1244 req->fh = newSVsv (fh);
1245 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1246
1247 REQ_SEND (req);
1248}
1249
1250void
1251aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1252 SV * fh
1253 UV offset
1254 UV length
1255 SV * data
1256 UV dataoffset
1257 SV * callback
1258 ALIAS:
1259 aio_read = REQ_READ
1260 aio_write = REQ_WRITE
1261 PROTOTYPE: $$$$$;$
1262 PPCODE:
380{ 1263{
381 aio_req req; 1264 aio_req req;
1265 STRLEN svlen;
1266 char *svptr = SvPVbyte (data, svlen);
382 1267
383 Newz (0, req, 1, aio_cb); 1268 SvUPGRADE (data, SVt_PV);
1269 SvPOK_on (data);
384 1270
385 if (!req) 1271 if (dataoffset < 0)
386 croak ("out of memory during aio_req allocation"); 1272 dataoffset += svlen;
387 1273
388 req->type = ix; 1274 if (dataoffset < 0 || dataoffset > svlen)
389 req->fd = PerlIO_fileno (fh); 1275 croak ("data offset outside of string");
390 req->callback = SvREFCNT_inc (callback);
391 1276
392 send_req (req); 1277 if (ix == REQ_WRITE)
393} 1278 {
394 1279 /* write: check length and adjust. */
395void 1280 if (length < 0 || length + dataoffset > svlen)
396aio_read(fh,offset,length,data,dataoffset,callback) 1281 length = svlen - dataoffset;
397 InputStream fh 1282 }
398 UV offset 1283 else
399 IV length 1284 {
400 SV * data 1285 /* read: grow scalar as necessary */
401 IV dataoffset 1286 svptr = SvGROW (data, length + dataoffset);
402 SV * callback 1287 }
403 PROTOTYPE: $$$$$$
404 CODE:
405 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407void
408aio_write(fh,offset,length,data,dataoffset,callback)
409 OutputStream fh
410 UV offset
411 IV length
412 SV * data
413 IV dataoffset
414 SV * callback
415 PROTOTYPE: $$$$$$
416 CODE:
417 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
418
419void
420aio_readahead(fh,offset,length,callback)
421 InputStream fh
422 UV offset
423 IV length
424 SV * callback
425 PROTOTYPE: $$$$
426 CODE:
427{
428 aio_req req;
429 1288
430 if (length < 0) 1289 if (length < 0)
431 croak ("length must not be negative"); 1290 croak ("length must not be negative");
432 1291
433 Newz (0, req, 1, aio_cb); 1292 {
1293 dREQ;
434 1294
435 if (!req) 1295 req->type = ix;
436 croak ("out of memory during aio_req allocation"); 1296 req->fh = newSVsv (fh);
1297 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1298 : IoOFP (sv_2io (fh)));
1299 req->offset = offset;
1300 req->length = length;
1301 req->data = SvREFCNT_inc (data);
1302 req->dataptr = (char *)svptr + dataoffset;
1303
1304 if (!SvREADONLY (data))
1305 {
1306 SvREADONLY_on (data);
1307 req->data2ptr = (void *)data;
1308 }
1309
1310 REQ_SEND;
1311 }
1312}
1313
1314void
1315aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1316 SV * out_fh
1317 SV * in_fh
1318 UV in_offset
1319 UV length
1320 SV * callback
1321 PROTOTYPE: $$$$;$
1322 PPCODE:
1323{
1324 dREQ;
1325
1326 req->type = REQ_SENDFILE;
1327 req->fh = newSVsv (out_fh);
1328 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1329 req->fh2 = newSVsv (in_fh);
1330 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1331 req->offset = in_offset;
1332 req->length = length;
1333
1334 REQ_SEND;
1335}
1336
1337void
1338aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1339 SV * fh
1340 UV offset
1341 IV length
1342 SV * callback
1343 PROTOTYPE: $$$;$
1344 PPCODE:
1345{
1346 dREQ;
437 1347
438 req->type = REQ_READAHEAD; 1348 req->type = REQ_READAHEAD;
1349 req->fh = newSVsv (fh);
439 req->fd = PerlIO_fileno (fh); 1350 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
440 req->offset = offset; 1351 req->offset = offset;
441 req->length = length; 1352 req->length = length;
442 req->callback = SvREFCNT_inc (callback);
443 1353
444 send_req (req); 1354 REQ_SEND;
445} 1355}
446 1356
447void 1357void
448aio_stat(fh_or_path,callback) 1358aio_stat (fh_or_path,callback=&PL_sv_undef)
449 SV * fh_or_path 1359 SV * fh_or_path
450 SV * callback 1360 SV * callback
451 PROTOTYPE: $$
452 ALIAS: 1361 ALIAS:
1362 aio_stat = REQ_STAT
453 aio_lstat = 1 1363 aio_lstat = REQ_LSTAT
454 CODE: 1364 PPCODE:
455{ 1365{
456 aio_req req; 1366 dREQ;
457
458 Newz (0, req, 1, aio_cb);
459
460 if (!req)
461 croak ("out of memory during aio_req allocation");
462 1367
463 New (0, req->statdata, 1, Stat_t); 1368 New (0, req->statdata, 1, Stat_t);
464
465 if (!req->statdata) 1369 if (!req->statdata)
1370 {
1371 req_free (req);
466 croak ("out of memory during aio_req->statdata allocation"); 1372 croak ("out of memory during aio_req->statdata allocation");
1373 }
467 1374
468 if (SvPOK (fh_or_path)) 1375 if (SvPOK (fh_or_path))
469 { 1376 {
470 req->type = ix ? REQ_LSTAT : REQ_STAT; 1377 req->type = ix;
471 req->data = newSVsv (fh_or_path); 1378 req->data = newSVsv (fh_or_path);
472 req->dataptr = SvPV_nolen (req->data); 1379 req->dataptr = SvPVbyte_nolen (req->data);
473 } 1380 }
474 else 1381 else
475 { 1382 {
476 req->type = REQ_FSTAT; 1383 req->type = REQ_FSTAT;
1384 req->fh = newSVsv (fh_or_path);
477 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1385 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
478 } 1386 }
479 1387
480 req->callback = SvREFCNT_inc (callback); 1388 REQ_SEND;
481
482 send_req (req);
483} 1389}
484 1390
485void 1391void
486aio_unlink(pathname,callback) 1392aio_unlink (pathname,callback=&PL_sv_undef)
487 SV * pathname 1393 SV * pathname
488 SV * callback 1394 SV * callback
1395 ALIAS:
1396 aio_unlink = REQ_UNLINK
1397 aio_rmdir = REQ_RMDIR
1398 aio_readdir = REQ_READDIR
1399 PPCODE:
1400{
1401 dREQ;
1402
1403 req->type = ix;
1404 req->data = newSVsv (pathname);
1405 req->dataptr = SvPVbyte_nolen (req->data);
1406
1407 REQ_SEND;
1408}
1409
1410void
1411aio_link (oldpath,newpath,callback=&PL_sv_undef)
1412 SV * oldpath
1413 SV * newpath
1414 SV * callback
1415 ALIAS:
1416 aio_link = REQ_LINK
1417 aio_symlink = REQ_SYMLINK
1418 aio_rename = REQ_RENAME
1419 PPCODE:
1420{
1421 dREQ;
1422
1423 req->type = ix;
1424 req->fh = newSVsv (oldpath);
1425 req->data2ptr = SvPVbyte_nolen (req->fh);
1426 req->data = newSVsv (newpath);
1427 req->dataptr = SvPVbyte_nolen (req->data);
1428
1429 REQ_SEND;
1430}
1431
1432void
1433aio_busy (delay,callback=&PL_sv_undef)
1434 double delay
1435 SV * callback
1436 PPCODE:
1437{
1438 dREQ;
1439
1440 req->type = REQ_BUSY;
1441 req->fd = delay < 0. ? 0 : delay;
1442 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1443
1444 REQ_SEND;
1445}
1446
1447void
1448aio_group (callback=&PL_sv_undef)
1449 SV * callback
489 PROTOTYPE: $$ 1450 PROTOTYPE: ;$
1451 PPCODE:
1452{
1453 dREQ;
1454
1455 req->type = REQ_GROUP;
1456 req_send (req);
1457
1458 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1459}
1460
1461void
1462aio_nop (callback=&PL_sv_undef)
1463 SV * callback
1464 PPCODE:
1465{
1466 dREQ;
1467
1468 req->type = REQ_NOP;
1469
1470 REQ_SEND;
1471}
1472
1473int
1474aioreq_pri (int pri = 0)
1475 PROTOTYPE: ;$
490 CODE: 1476 CODE:
491{ 1477 RETVAL = next_pri - PRI_BIAS;
492 aio_req req; 1478 if (items > 0)
493 1479 {
494 Newz (0, req, 1, aio_cb); 1480 if (pri < PRI_MIN) pri = PRI_MIN;
495 1481 if (pri > PRI_MAX) pri = PRI_MAX;
496 if (!req) 1482 next_pri = pri + PRI_BIAS;
497 croak ("out of memory during aio_req allocation"); 1483 }
498 1484 OUTPUT:
499 req->type = REQ_UNLINK; 1485 RETVAL
500 req->data = newSVsv (pathname); 1486
501 req->dataptr = SvPV_nolen (req->data); 1487void
502 req->callback = SvREFCNT_inc (callback); 1488aioreq_nice (int nice = 0)
503 1489 CODE:
504 send_req (req); 1490 nice = next_pri - nice;
505} 1491 if (nice < PRI_MIN) nice = PRI_MIN;
1492 if (nice > PRI_MAX) nice = PRI_MAX;
1493 next_pri = nice + PRI_BIAS;
1494
1495void
1496flush ()
1497 PROTOTYPE:
1498 CODE:
1499 while (nreqs)
1500 {
1501 poll_wait ();
1502 poll_cb (0);
1503 }
1504
1505void
1506poll()
1507 PROTOTYPE:
1508 CODE:
1509 if (nreqs)
1510 {
1511 poll_wait ();
1512 poll_cb (0);
1513 }
506 1514
507int 1515int
508poll_fileno() 1516poll_fileno()
509 PROTOTYPE: 1517 PROTOTYPE:
510 CODE: 1518 CODE:
511 RETVAL = respipe[0]; 1519 RETVAL = respipe [0];
512 OUTPUT: 1520 OUTPUT:
513 RETVAL 1521 RETVAL
514 1522
515int 1523int
516poll_cb(...) 1524poll_cb(...)
517 PROTOTYPE: 1525 PROTOTYPE:
518 CODE: 1526 CODE:
1527 RETVAL = poll_cb (0);
1528 OUTPUT:
1529 RETVAL
1530
1531int
1532poll_some(int max = 0)
1533 PROTOTYPE: $
1534 CODE:
519 RETVAL = poll_cb (aTHX); 1535 RETVAL = poll_cb (max);
520 OUTPUT: 1536 OUTPUT:
521 RETVAL 1537 RETVAL
522 1538
523void 1539void
524poll_wait() 1540poll_wait()
525 PROTOTYPE: 1541 PROTOTYPE:
526 CODE: 1542 CODE:
1543 if (nreqs)
527 poll_wait (); 1544 poll_wait ();
528 1545
529int 1546int
530nreqs() 1547nreqs()
531 PROTOTYPE: 1548 PROTOTYPE:
532 CODE: 1549 CODE:
533 RETVAL = nreqs; 1550 RETVAL = nreqs;
534 OUTPUT: 1551 OUTPUT:
535 RETVAL 1552 RETVAL
536 1553
1554int
1555nready()
1556 PROTOTYPE:
1557 CODE:
1558 RETVAL = get_nready ();
1559 OUTPUT:
1560 RETVAL
1561
1562int
1563npending()
1564 PROTOTYPE:
1565 CODE:
1566 RETVAL = get_npending ();
1567 OUTPUT:
1568 RETVAL
1569
1570PROTOTYPES: DISABLE
1571
1572MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1573
1574void
1575cancel (aio_req_ornot req)
1576 CODE:
1577 req_cancel (req);
1578
1579void
1580cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1581 CODE:
1582 SvREFCNT_dec (req->callback);
1583 req->callback = newSVsv (callback);
1584
1585MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1586
1587void
1588add (aio_req grp, ...)
1589 PPCODE:
1590{
1591 int i;
1592 aio_req req;
1593
1594 if (grp->fd == 2)
1595 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1596
1597 for (i = 1; i < items; ++i )
1598 {
1599 if (GIMME_V != G_VOID)
1600 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1601
1602 req = SvAIO_REQ (ST (i));
1603
1604 if (req)
1605 {
1606 ++grp->length;
1607 req->grp = grp;
1608
1609 req->grp_prev = 0;
1610 req->grp_next = grp->grp_first;
1611
1612 if (grp->grp_first)
1613 grp->grp_first->grp_prev = req;
1614
1615 grp->grp_first = req;
1616 }
1617 }
1618}
1619
1620void
1621cancel_subs (aio_req_ornot req)
1622 CODE:
1623 req_cancel_subs (req);
1624
1625void
1626result (aio_req grp, ...)
1627 CODE:
1628{
1629 int i;
1630 AV *av;
1631
1632 grp->errorno = errno;
1633
1634 av = newAV ();
1635
1636 for (i = 1; i < items; ++i )
1637 av_push (av, newSVsv (ST (i)));
1638
1639 SvREFCNT_dec (grp->data);
1640 grp->data = (SV *)av;
1641}
1642
1643void
1644errno (aio_req grp, int errorno = errno)
1645 CODE:
1646 grp->errorno = errorno;
1647
1648void
1649limit (aio_req grp, int limit)
1650 CODE:
1651 grp->fd2 = limit;
1652 aio_grp_feed (grp);
1653
1654void
1655feed (aio_req grp, SV *callback=&PL_sv_undef)
1656 CODE:
1657{
1658 SvREFCNT_dec (grp->fh2);
1659 grp->fh2 = newSVsv (callback);
1660
1661 if (grp->fd2 <= 0)
1662 grp->fd2 = 2;
1663
1664 aio_grp_feed (grp);
1665}
1666

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