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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.23 by root, Tue Aug 16 23:33:34 2005 UTC vs.
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC

… …
5#include "perl.h" 5#include "perl.h"
6#include "XSUB.h" 6#include "XSUB.h"
7 7
8#include "autoconf/config.h" 8#include "autoconf/config.h"
9 9
10#include <pthread.h>
11
12#include <stddef.h>
13#include <errno.h>
10#include <sys/types.h> 14#include <sys/types.h>
11#include <sys/stat.h> 15#include <sys/stat.h>
12 16#include <limits.h>
13#include <unistd.h> 17#include <unistd.h>
14#include <fcntl.h> 18#include <fcntl.h>
15#include <signal.h> 19#include <signal.h>
16#include <sched.h> 20#include <sched.h>
17 21
18#include <pthread.h> 22#if HAVE_SENDFILE
23# if __linux
24# include <sys/sendfile.h>
25# elif __freebsd
26# include <sys/socket.h>
27# include <sys/uio.h>
28# elif __hpux
29# include <sys/socket.h>
30# elif __solaris /* not yet */
31# include <sys/sendfile.h>
32# else
33# error sendfile support requested but not available
34# endif
35#endif
19 36
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 37/* used for struct dirent, AIX doesn't provide it */
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 38#ifndef NAME_MAX
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 39# define NAME_MAX 4096
40#endif
23 41
24#if __ia64 42#if __ia64
25# define STACKSIZE 65536 43# define STACKSIZE 65536
26#else 44#else
27# define STACKSIZE 4096 45# define STACKSIZE 8192
28#endif 46#endif
29 47
30enum { 48enum {
31 REQ_QUIT, 49 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 50 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 51 REQ_READ, REQ_WRITE, REQ_READAHEAD,
52 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, 53 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 54 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR, 55 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37 REQ_SYMLINK, 56 REQ_READDIR,
57 REQ_LINK, REQ_SYMLINK,
58 REQ_GROUP,
38}; 59};
39 60
61#define AIO_REQ_KLASS "IO::AIO::REQ"
62#define AIO_GRP_KLASS "IO::AIO::GRP"
63
40typedef struct aio_cb { 64typedef struct aio_cb
65{
66 struct aio_cb *grp, *grp_prev, *grp_next;
67
41 struct aio_cb *volatile next; 68 struct aio_cb *volatile next;
42 69
43 int type; 70 SV *self; /* the perl counterpart of this request, if any */
44 71
45 int fd; 72 SV *data, *callback;
73 SV *fh, *fh2;
74 void *dataptr, *data2ptr;
75 Stat_t *statdata;
46 off_t offset; 76 off_t offset;
47 size_t length; 77 size_t length;
48 ssize_t result; 78 ssize_t result;
79
80 int type;
81 int fd, fd2;
82 int errorno;
83 STRLEN dataoffset;
49 mode_t mode; /* open */ 84 mode_t mode; /* open */
50 int errorno; 85 unsigned char cancelled;
51 SV *data, *callback, *fh;
52 void *dataptr, *data2ptr;
53 STRLEN dataoffset;
54
55 Stat_t *statdata;
56} aio_cb; 86} aio_cb;
57 87
58typedef aio_cb *aio_req; 88typedef aio_cb *aio_req;
89typedef aio_cb *aio_req_ornot;
90typedef aio_cb *aio_group;
59 91
60static int started; 92static int started, wanted;
61static volatile int nreqs; 93static volatile int nreqs;
62static int max_outstanding = 1<<30; 94static int max_outstanding = 1<<30;
63static int respipe [2]; 95static int respipe [2];
64 96
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 97static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 98static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 99static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69 100
70static volatile aio_req reqs, reqe; /* queue start, queue end */ 101static volatile aio_req reqs, reqe; /* queue start, queue end */
71static volatile aio_req ress, rese; /* queue start, queue end */ 102static volatile aio_req ress, rese; /* queue start, queue end */
103
104/* must be called at most once */
105static SV *req_sv (aio_req req, const char *klass)
106{
107 req->self = (SV *)newHV ();
108 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
109
110 return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));
111}
112
113static aio_req SvAIO_REQ (SV *sv, const char *klass)
114{
115 if (!sv_derived_from (sv, klass) || !SvROK (sv))
116 croak ("object of class %s expected", klass);
117
118 MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
119
120 return mg ? (aio_req)mg->mg_ptr : 0;
121}
122
123static void req_free (aio_req req)
124{
125 if (req->self)
126 {
127 sv_unmagic (req->self, PERL_MAGIC_ext);
128 SvREFCNT_dec (req->self);
129 }
130
131 if (req->data)
132 SvREFCNT_dec (req->data);
133
134 if (req->fh)
135 SvREFCNT_dec (req->fh);
136
137 if (req->fh2)
138 SvREFCNT_dec (req->fh2);
139
140 if (req->statdata)
141 Safefree (req->statdata);
142
143 if (req->callback)
144 SvREFCNT_dec (req->callback);
145
146 if (req->type == REQ_READDIR && req->result >= 0)
147 free (req->data2ptr);
148
149 Safefree (req);
150}
72 151
73static void 152static void
74poll_wait () 153poll_wait ()
75{ 154{
76 if (nreqs && !ress) 155 if (nreqs && !ress)
… …
86static int 165static int
87poll_cb () 166poll_cb ()
88{ 167{
89 dSP; 168 dSP;
90 int count = 0; 169 int count = 0;
170 int do_croak = 0;
91 aio_req req, prv; 171 aio_req req;
92 172
173 for (;;)
174 {
93 pthread_mutex_lock (&reslock); 175 pthread_mutex_lock (&reslock);
176 req = ress;
94 177
95 { 178 if (req)
179 {
180 ress = req->next;
181
182 if (!ress)
183 {
96 /* read any signals sent by the worker threads */ 184 /* read any signals sent by the worker threads */
97 char buf [32]; 185 char buf [32];
98 while (read (respipe [0], buf, 32) == 32) 186 while (read (respipe [0], buf, 32) == 32)
187 ;
188
189 rese = 0;
190 }
99 ; 191 }
100 }
101 192
102 req = ress;
103 ress = rese = 0;
104
105 pthread_mutex_unlock (&reslock); 193 pthread_mutex_unlock (&reslock);
106 194
107 while (req) 195 if (!req)
108 { 196 break;
197
109 nreqs--; 198 nreqs--;
110 199
111 if (req->type == REQ_QUIT) 200 if (req->type == REQ_QUIT)
112 started--; 201 started--;
113 else 202 else
114 { 203 {
115 int errorno = errno; 204 int errorno = errno;
116 errno = req->errorno; 205 errno = req->errorno;
117 206
118 if (req->type == REQ_READ) 207 if (req->type == REQ_READ)
119 SvCUR_set (req->data, req->dataoffset 208 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
120 + req->result > 0 ? req->result : 0);
121 209
210 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
211 SvREADONLY_off (req->data);
212
122 if (req->data) 213 if (req->statdata)
123 SvREFCNT_dec (req->data);
124
125 if (req->fh)
126 SvREFCNT_dec (req->fh);
127
128 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
129 { 214 {
130 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 215 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131 PL_laststatval = req->result; 216 PL_laststatval = req->result;
132 PL_statcache = *(req->statdata); 217 PL_statcache = *(req->statdata);
133
134 Safefree (req->statdata);
135 } 218 }
136 219
137 ENTER; 220 ENTER;
138 PUSHMARK (SP); 221 PUSHMARK (SP);
139 XPUSHs (sv_2mortal (newSViv (req->result)));
140 222
141 if (req->type == REQ_OPEN) 223 if (req->type == REQ_READDIR)
142 { 224 {
143 /* convert fd to fh */ 225 SV *rv = &PL_sv_undef;
144 SV *fh;
145 226
146 PUTBACK; 227 if (req->result >= 0)
147 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 228 {
148 SPAGAIN; 229 char *buf = req->data2ptr;
230 AV *av = newAV ();
149 231
150 fh = SvREFCNT_inc (POPs); 232 while (req->result)
233 {
234 SV *sv = newSVpv (buf, 0);
151 235
236 av_push (av, sv);
237 buf += SvCUR (sv) + 1;
238 req->result--;
239 }
240
241 rv = sv_2mortal (newRV_noinc ((SV *)av));
242 }
243
152 PUSHMARK (SP); 244 XPUSHs (rv);
153 XPUSHs (sv_2mortal (fh));
154 } 245 }
246 else
247 {
248 XPUSHs (sv_2mortal (newSViv (req->result)));
155 249
250 if (req->type == REQ_OPEN)
251 {
252 /* convert fd to fh */
253 SV *fh;
254
255 PUTBACK;
256 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
257 SPAGAIN;
258
259 fh = SvREFCNT_inc (POPs);
260
261 PUSHMARK (SP);
262 XPUSHs (sv_2mortal (fh));
263 }
264 }
265
156 if (SvOK (req->callback)) 266 if (SvOK (req->callback) && !req->cancelled)
157 { 267 {
158 PUTBACK; 268 PUTBACK;
159 call_sv (req->callback, G_VOID | G_EVAL); 269 call_sv (req->callback, G_VOID | G_EVAL);
160 SPAGAIN; 270 SPAGAIN;
271
272 if (SvTRUE (ERRSV))
273 {
274 req_free (req);
275 croak (0);
276 }
161 } 277 }
162 278
163 LEAVE; 279 LEAVE;
164
165 if (req->callback)
166 SvREFCNT_dec (req->callback);
167 280
168 errno = errorno; 281 errno = errorno;
169 count++; 282 count++;
170 } 283 }
171 284
172 prv = req;
173 req = req->next;
174 Safefree (prv); 285 req_free (req);
175
176 /* TODO: croak on errors? */
177 } 286 }
178 287
179 return count; 288 return count;
180} 289}
181 290
… …
200 309
201 sigprocmask (SIG_SETMASK, &oldsigset, 0); 310 sigprocmask (SIG_SETMASK, &oldsigset, 0);
202} 311}
203 312
204static void 313static void
205send_req (aio_req req) 314req_send (aio_req req)
206{ 315{
316 while (started < wanted && nreqs >= started)
317 start_thread ();
318
207 nreqs++; 319 nreqs++;
208 320
209 pthread_mutex_lock (&reqlock); 321 pthread_mutex_lock (&reqlock);
210 322
211 req->next = 0; 323 req->next = 0;
… …
219 reqe = reqs = req; 331 reqe = reqs = req;
220 332
221 pthread_cond_signal (&reqwait); 333 pthread_cond_signal (&reqwait);
222 pthread_mutex_unlock (&reqlock); 334 pthread_mutex_unlock (&reqlock);
223 335
224 while (nreqs > max_outstanding) 336 if (nreqs > max_outstanding)
337 for (;;)
338 {
339 poll_cb ();
340
341 if (nreqs <= max_outstanding)
342 break;
343
344 poll_wait ();
345 }
346}
347
348static void
349end_thread (void)
350{
351 aio_req req;
352 Newz (0, req, 1, aio_cb);
353 req->type = REQ_QUIT;
354
355 req_send (req);
356}
357
358static void min_parallel (int nthreads)
359{
360 if (wanted < nthreads)
361 wanted = nthreads;
362}
363
364static void max_parallel (int nthreads)
365{
366 int cur = started;
367
368 if (wanted > nthreads)
369 wanted = nthreads;
370
371 while (cur > wanted)
372 {
373 end_thread ();
374 cur--;
375 }
376
377 while (started > wanted)
225 { 378 {
226 poll_wait (); 379 poll_wait ();
227 poll_cb (); 380 poll_cb ();
228 } 381 }
229} 382}
230 383
231static void 384static void create_pipe ()
232end_thread (void)
233{ 385{
234 aio_req req; 386 if (pipe (respipe))
235 New (0, req, 1, aio_cb); 387 croak ("unable to initialize result pipe");
236 req->type = REQ_QUIT;
237 388
238 send_req (req); 389 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
239} 390 croak ("cannot set result pipe to nonblocking mode");
240 391
241 392 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
242static void min_parallel (int nthreads) 393 croak ("cannot set result pipe to nonblocking mode");
243{
244 while (nthreads > started)
245 start_thread ();
246}
247
248static void max_parallel (int nthreads)
249{
250 int cur = started;
251 while (cur > nthreads)
252 {
253 end_thread ();
254 cur--;
255 }
256
257 while (started > nthreads)
258 {
259 poll_wait ();
260 poll_cb ();
261 }
262}
263
264static int fork_started;
265
266static void atfork_prepare (void)
267{
268 pthread_mutex_lock (&frklock);
269
270 fork_started = started;
271
272 for (;;) {
273 while (nreqs)
274 {
275 poll_wait ();
276 poll_cb ();
277 }
278
279 max_parallel (0);
280
281 pthread_mutex_lock (&reqlock);
282
283 if (!nreqs && !started)
284 break;
285
286 pthread_mutex_unlock (&reqlock);
287
288 min_parallel (fork_started);
289 }
290
291 pthread_mutex_lock (&reslock);
292
293 assert (!started);
294 assert (!nreqs);
295 assert (!reqs && !reqe);
296 assert (!ress && !rese);
297}
298
299static void atfork_parent (void)
300{
301 pthread_mutex_unlock (&reslock);
302 min_parallel (fork_started);
303 pthread_mutex_unlock (&reqlock);
304 pthread_mutex_unlock (&frklock);
305}
306
307static void atfork_child (void)
308{
309 reqs = reqe = 0;
310
311 atfork_parent ();
312} 394}
313 395
314/*****************************************************************************/ 396/*****************************************************************************/
315/* work around various missing functions */ 397/* work around various missing functions */
316 398
… …
321/* 403/*
322 * make our pread/pwrite safe against themselves, but not against 404 * make our pread/pwrite safe against themselves, but not against
323 * normal read/write by using a mutex. slows down execution a lot, 405 * normal read/write by using a mutex. slows down execution a lot,
324 * but that's your problem, not mine. 406 * but that's your problem, not mine.
325 */ 407 */
326static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 408static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
327 409
328static ssize_t 410static ssize_t
329pread (int fd, void *buf, size_t count, off_t offset) 411pread (int fd, void *buf, size_t count, off_t offset)
330{ 412{
331 ssize_t res; 413 ssize_t res;
332 off_t ooffset; 414 off_t ooffset;
333 415
334 pthread_mutex_lock (&iolock); 416 pthread_mutex_lock (&preadwritelock);
335 ooffset = lseek (fd, 0, SEEK_CUR); 417 ooffset = lseek (fd, 0, SEEK_CUR);
336 lseek (fd, offset, SEEK_SET); 418 lseek (fd, offset, SEEK_SET);
337 res = read (fd, buf, count); 419 res = read (fd, buf, count);
338 lseek (fd, ooffset, SEEK_SET); 420 lseek (fd, ooffset, SEEK_SET);
339 pthread_mutex_unlock (&iolock); 421 pthread_mutex_unlock (&preadwritelock);
340 422
341 return res; 423 return res;
342} 424}
343 425
344static ssize_t 426static ssize_t
345pwrite (int fd, void *buf, size_t count, off_t offset) 427pwrite (int fd, void *buf, size_t count, off_t offset)
346{ 428{
347 ssize_t res; 429 ssize_t res;
348 off_t ooffset; 430 off_t ooffset;
349 431
350 pthread_mutex_lock (&iolock); 432 pthread_mutex_lock (&preadwritelock);
351 ooffset = lseek (fd, 0, SEEK_CUR); 433 ooffset = lseek (fd, 0, SEEK_CUR);
352 lseek (fd, offset, SEEK_SET); 434 lseek (fd, offset, SEEK_SET);
353 res = write (fd, buf, count); 435 res = write (fd, buf, count);
354 lseek (fd, offset, SEEK_SET); 436 lseek (fd, offset, SEEK_SET);
355 pthread_mutex_unlock (&iolock); 437 pthread_mutex_unlock (&preadwritelock);
356 438
357 return res; 439 return res;
358} 440}
359#endif 441#endif
360 442
… …
363#endif 445#endif
364 446
365#if !HAVE_READAHEAD 447#if !HAVE_READAHEAD
366# define readahead aio_readahead 448# define readahead aio_readahead
367 449
368static char readahead_buf[4096];
369
370static ssize_t 450static ssize_t
371readahead (int fd, off_t offset, size_t count) 451readahead (int fd, off_t offset, size_t count)
372{ 452{
453 char readahead_buf[4096];
454
373 while (count > 0) 455 while (count > 0)
374 { 456 {
375 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 457 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
376 458
377 pread (fd, readahead_buf, len, offset); 459 pread (fd, readahead_buf, len, offset);
… …
380 } 462 }
381 463
382 errno = 0; 464 errno = 0;
383} 465}
384#endif 466#endif
467
468#if !HAVE_READDIR_R
469# define readdir_r aio_readdir_r
470
471static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
472
473static int
474readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
475{
476 struct dirent *e;
477 int errorno;
478
479 pthread_mutex_lock (&readdirlock);
480
481 e = readdir (dirp);
482 errorno = errno;
483
484 if (e)
485 {
486 *res = ent;
487 strcpy (ent->d_name, e->d_name);
488 }
489 else
490 *res = 0;
491
492 pthread_mutex_unlock (&readdirlock);
493
494 errno = errorno;
495 return e ? 0 : -1;
496}
497#endif
498
499/* sendfile always needs emulation */
500static ssize_t
501sendfile_ (int ofd, int ifd, off_t offset, size_t count)
502{
503 ssize_t res;
504
505 if (!count)
506 return 0;
507
508#if HAVE_SENDFILE
509# if __linux
510 res = sendfile (ofd, ifd, &offset, count);
511
512# elif __freebsd
513 /*
514 * Of course, the freebsd sendfile is a dire hack with no thoughts
515 * wasted on making it similar to other I/O functions.
516 */
517 {
518 off_t sbytes;
519 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
520
521 if (res < 0 && sbytes)
522 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
523 res = sbytes;
524 }
525
526# elif __hpux
527 res = sendfile (ofd, ifd, offset, count, 0, 0);
528
529# elif __solaris
530 {
531 struct sendfilevec vec;
532 size_t sbytes;
533
534 vec.sfv_fd = ifd;
535 vec.sfv_flag = 0;
536 vec.sfv_off = offset;
537 vec.sfv_len = count;
538
539 res = sendfilev (ofd, &vec, 1, &sbytes);
540
541 if (res < 0 && sbytes)
542 res = sbytes;
543 }
544
545# endif
546#else
547 res = -1;
548 errno = ENOSYS;
549#endif
550
551 if (res < 0
552 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
553#if __solaris
554 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
555#endif
556 )
557 )
558 {
559 /* emulate sendfile. this is a major pain in the ass */
560 char buf[4096];
561 res = 0;
562
563 while (count)
564 {
565 ssize_t cnt;
566
567 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
568
569 if (cnt <= 0)
570 {
571 if (cnt && !res) res = -1;
572 break;
573 }
574
575 cnt = write (ofd, buf, cnt);
576
577 if (cnt <= 0)
578 {
579 if (cnt && !res) res = -1;
580 break;
581 }
582
583 offset += cnt;
584 res += cnt;
585 count -= cnt;
586 }
587 }
588
589 return res;
590}
591
592/* read a full directory */
593static int
594scandir_ (const char *path, void **namesp)
595{
596 DIR *dirp = opendir (path);
597 union
598 {
599 struct dirent d;
600 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
601 } u;
602 struct dirent *entp;
603 char *name, *names;
604 int memlen = 4096;
605 int memofs = 0;
606 int res = 0;
607 int errorno;
608
609 if (!dirp)
610 return -1;
611
612 names = malloc (memlen);
613
614 for (;;)
615 {
616 errno = 0, readdir_r (dirp, &u.d, &entp);
617
618 if (!entp)
619 break;
620
621 name = entp->d_name;
622
623 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
624 {
625 int len = strlen (name) + 1;
626
627 res++;
628
629 while (memofs + len > memlen)
630 {
631 memlen *= 2;
632 names = realloc (names, memlen);
633 if (!names)
634 break;
635 }
636
637 memcpy (names + memofs, name, len);
638 memofs += len;
639 }
640 }
641
642 errorno = errno;
643 closedir (dirp);
644
645 if (errorno)
646 {
647 free (names);
648 errno = errorno;
649 res = -1;
650 }
651
652 *namesp = (void *)names;
653 return res;
654}
385 655
386/*****************************************************************************/ 656/*****************************************************************************/
387 657
388static void * 658static void *
389aio_proc (void *thr_arg) 659aio_proc (void *thr_arg)
… …
413 683
414 pthread_mutex_unlock (&reqlock); 684 pthread_mutex_unlock (&reqlock);
415 685
416 errno = 0; /* strictly unnecessary */ 686 errno = 0; /* strictly unnecessary */
417 687
418 type = req->type; 688 if (!req->cancelled)
419
420 switch (type) 689 switch (req->type)
421 { 690 {
422 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 691 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
423 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 692 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
424 693
425 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 694 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
695 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
426 696
427 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 697 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
428 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 698 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
429 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 699 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430 700
431 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 701 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
432 case REQ_CLOSE: req->result = close (req->fd); break; 702 case REQ_CLOSE: req->result = close (req->fd); break;
433 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 703 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434 case REQ_RMDIR: req->result = rmdir (req->dataptr); break; 704 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
705 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
706 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
435 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 707 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
436 708
437 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 709 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438 case REQ_FSYNC: req->result = fsync (req->fd); break; 710 case REQ_FSYNC: req->result = fsync (req->fd); break;
711 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
439 712
440 case REQ_QUIT: 713 case REQ_QUIT:
441 break; 714 break;
442 715
443 default: 716 default:
444 req->result = ENOSYS; 717 req->result = ENOSYS;
445 break; 718 break;
446 } 719 }
447 720
448 req->errorno = errno; 721 req->errorno = errno;
449 722
450 pthread_mutex_lock (&reslock); 723 pthread_mutex_lock (&reslock);
451 724
… …
469 while (type != REQ_QUIT); 742 while (type != REQ_QUIT);
470 743
471 return 0; 744 return 0;
472} 745}
473 746
747/*****************************************************************************/
748
749static void atfork_prepare (void)
750{
751 pthread_mutex_lock (&reqlock);
752 pthread_mutex_lock (&reslock);
753#if !HAVE_PREADWRITE
754 pthread_mutex_lock (&preadwritelock);
755#endif
756#if !HAVE_READDIR_R
757 pthread_mutex_lock (&readdirlock);
758#endif
759}
760
761static void atfork_parent (void)
762{
763#if !HAVE_READDIR_R
764 pthread_mutex_unlock (&readdirlock);
765#endif
766#if !HAVE_PREADWRITE
767 pthread_mutex_unlock (&preadwritelock);
768#endif
769 pthread_mutex_unlock (&reslock);
770 pthread_mutex_unlock (&reqlock);
771}
772
773static void atfork_child (void)
774{
775 aio_req prv;
776
777 started = 0;
778
779 while (reqs)
780 {
781 prv = reqs;
782 reqs = prv->next;
783 req_free (prv);
784 }
785
786 reqs = reqe = 0;
787
788 while (ress)
789 {
790 prv = ress;
791 ress = prv->next;
792 req_free (prv);
793 }
794
795 ress = rese = 0;
796
797 close (respipe [0]);
798 close (respipe [1]);
799 create_pipe ();
800
801 atfork_parent ();
802}
803
474#define dREQ \ 804#define dREQ \
475 aio_req req; \ 805 aio_req req; \
476 \ 806 \
477 if (SvOK (callback) && !SvROK (callback)) \ 807 if (SvOK (callback) && !SvROK (callback)) \
478 croak ("clalback must be undef or of reference type"); \ 808 croak ("callback must be undef or of reference type"); \
479 \ 809 \
480 Newz (0, req, 1, aio_cb); \ 810 Newz (0, req, 1, aio_cb); \
481 if (!req) \ 811 if (!req) \
482 croak ("out of memory during aio_req allocation"); \ 812 croak ("out of memory during aio_req allocation"); \
483 \ 813 \
484 req->callback = SvREFCNT_inc (callback); 814 req->callback = newSVsv (callback)
815
816#define REQ_SEND \
817 req_send (req); \
818 \
819 if (GIMME_V != G_VOID) \
820 XPUSHs (req_sv (req, AIO_REQ_KLASS));
485 821
486MODULE = IO::AIO PACKAGE = IO::AIO 822MODULE = IO::AIO PACKAGE = IO::AIO
487 823
488PROTOTYPES: ENABLE 824PROTOTYPES: ENABLE
489 825
490BOOT: 826BOOT:
491{ 827{
492 if (pipe (respipe)) 828 HV *stash = gv_stashpv ("IO::AIO", 1);
493 croak ("unable to initialize result pipe"); 829 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
830 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
831 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
494 832
495 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 833 create_pipe ();
496 croak ("cannot set result pipe to nonblocking mode");
497
498 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
499 croak ("cannot set result pipe to nonblocking mode");
500
501 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 834 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
502} 835}
503 836
504void 837void
505min_parallel(nthreads) 838min_parallel (nthreads)
506 int nthreads 839 int nthreads
507 PROTOTYPE: $ 840 PROTOTYPE: $
508 841
509void 842void
510max_parallel(nthreads) 843max_parallel (nthreads)
511 int nthreads 844 int nthreads
512 PROTOTYPE: $ 845 PROTOTYPE: $
513 846
514int 847int
515max_outstanding(nreqs) 848max_outstanding (nreqs)
516 int nreqs 849 int nreqs
517 PROTOTYPE: $ 850 PROTOTYPE: $
518 CODE: 851 CODE:
519 RETVAL = max_outstanding; 852 RETVAL = max_outstanding;
520 max_outstanding = nreqs; 853 max_outstanding = nreqs;
521 854
522void 855void
523aio_open(pathname,flags,mode,callback=&PL_sv_undef) 856aio_open (pathname,flags,mode,callback=&PL_sv_undef)
524 SV * pathname 857 SV * pathname
525 int flags 858 int flags
526 int mode 859 int mode
527 SV * callback 860 SV * callback
528 PROTOTYPE: $$$;$ 861 PROTOTYPE: $$$;$
529 CODE: 862 PPCODE:
530{ 863{
531 dREQ; 864 dREQ;
532 865
533 req->type = REQ_OPEN; 866 req->type = REQ_OPEN;
534 req->data = newSVsv (pathname); 867 req->data = newSVsv (pathname);
535 req->dataptr = SvPVbyte_nolen (req->data); 868 req->dataptr = SvPVbyte_nolen (req->data);
536 req->fd = flags; 869 req->fd = flags;
537 req->mode = mode; 870 req->mode = mode;
538 871
539 send_req (req); 872 REQ_SEND;
540} 873}
541 874
542void 875void
543aio_close(fh,callback=&PL_sv_undef) 876aio_close (fh,callback=&PL_sv_undef)
544 SV * fh 877 SV * fh
545 SV * callback 878 SV * callback
546 PROTOTYPE: $;$ 879 PROTOTYPE: $;$
547 ALIAS: 880 ALIAS:
548 aio_close = REQ_CLOSE 881 aio_close = REQ_CLOSE
549 aio_fsync = REQ_FSYNC 882 aio_fsync = REQ_FSYNC
550 aio_fdatasync = REQ_FDATASYNC 883 aio_fdatasync = REQ_FDATASYNC
551 CODE: 884 PPCODE:
552{ 885{
553 dREQ; 886 dREQ;
554 887
555 req->type = ix; 888 req->type = ix;
556 req->fh = newSVsv (fh); 889 req->fh = newSVsv (fh);
557 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 890 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
558 891
559 send_req (req); 892 REQ_SEND (req);
560} 893}
561 894
562void 895void
563aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 896aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
564 SV * fh 897 SV * fh
565 UV offset 898 UV offset
566 IV length 899 UV length
567 SV * data 900 SV * data
568 IV dataoffset 901 UV dataoffset
569 SV * callback 902 SV * callback
570 ALIAS: 903 ALIAS:
571 aio_read = REQ_READ 904 aio_read = REQ_READ
572 aio_write = REQ_WRITE 905 aio_write = REQ_WRITE
573 PROTOTYPE: $$$$$;$ 906 PROTOTYPE: $$$$$;$
574 CODE: 907 PPCODE:
575{ 908{
576 aio_req req; 909 aio_req req;
577 STRLEN svlen; 910 STRLEN svlen;
578 char *svptr = SvPVbyte (data, svlen); 911 char *svptr = SvPVbyte (data, svlen);
579 912
… …
610 : IoOFP (sv_2io (fh))); 943 : IoOFP (sv_2io (fh)));
611 req->offset = offset; 944 req->offset = offset;
612 req->length = length; 945 req->length = length;
613 req->data = SvREFCNT_inc (data); 946 req->data = SvREFCNT_inc (data);
614 req->dataptr = (char *)svptr + dataoffset; 947 req->dataptr = (char *)svptr + dataoffset;
615 req->callback = SvREFCNT_inc (callback);
616 948
617 send_req (req); 949 if (!SvREADONLY (data))
950 {
951 SvREADONLY_on (data);
952 req->data2ptr = (void *)data;
953 }
954
955 REQ_SEND;
618 } 956 }
619} 957}
620 958
621void 959void
960aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
961 SV * out_fh
962 SV * in_fh
963 UV in_offset
964 UV length
965 SV * callback
966 PROTOTYPE: $$$$;$
967 PPCODE:
968{
969 dREQ;
970
971 req->type = REQ_SENDFILE;
972 req->fh = newSVsv (out_fh);
973 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
974 req->fh2 = newSVsv (in_fh);
975 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
976 req->offset = in_offset;
977 req->length = length;
978
979 REQ_SEND;
980}
981
982void
622aio_readahead(fh,offset,length,callback=&PL_sv_undef) 983aio_readahead (fh,offset,length,callback=&PL_sv_undef)
623 SV * fh 984 SV * fh
624 UV offset 985 UV offset
625 IV length 986 IV length
626 SV * callback 987 SV * callback
627 PROTOTYPE: $$$;$ 988 PROTOTYPE: $$$;$
628 CODE: 989 PPCODE:
629{ 990{
630 dREQ; 991 dREQ;
631 992
632 req->type = REQ_READAHEAD; 993 req->type = REQ_READAHEAD;
633 req->fh = newSVsv (fh); 994 req->fh = newSVsv (fh);
634 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 995 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
635 req->offset = offset; 996 req->offset = offset;
636 req->length = length; 997 req->length = length;
637 998
638 send_req (req); 999 REQ_SEND;
639} 1000}
640 1001
641void 1002void
642aio_stat(fh_or_path,callback=&PL_sv_undef) 1003aio_stat (fh_or_path,callback=&PL_sv_undef)
643 SV * fh_or_path 1004 SV * fh_or_path
644 SV * callback 1005 SV * callback
645 ALIAS: 1006 ALIAS:
646 aio_stat = REQ_STAT 1007 aio_stat = REQ_STAT
647 aio_lstat = REQ_LSTAT 1008 aio_lstat = REQ_LSTAT
648 CODE: 1009 PPCODE:
649{ 1010{
650 dREQ; 1011 dREQ;
651 1012
652 New (0, req->statdata, 1, Stat_t); 1013 New (0, req->statdata, 1, Stat_t);
653 if (!req->statdata) 1014 if (!req->statdata)
1015 {
1016 req_free (req);
654 croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)"); 1017 croak ("out of memory during aio_req->statdata allocation");
1018 }
655 1019
656 if (SvPOK (fh_or_path)) 1020 if (SvPOK (fh_or_path))
657 { 1021 {
658 req->type = ix; 1022 req->type = ix;
659 req->data = newSVsv (fh_or_path); 1023 req->data = newSVsv (fh_or_path);
… …
664 req->type = REQ_FSTAT; 1028 req->type = REQ_FSTAT;
665 req->fh = newSVsv (fh_or_path); 1029 req->fh = newSVsv (fh_or_path);
666 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1030 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
667 } 1031 }
668 1032
669 send_req (req); 1033 REQ_SEND;
670} 1034}
671 1035
672void 1036void
673aio_unlink(pathname,callback=&PL_sv_undef) 1037aio_unlink (pathname,callback=&PL_sv_undef)
674 SV * pathname 1038 SV * pathname
675 SV * callback 1039 SV * callback
676 ALIAS: 1040 ALIAS:
677 aio_unlink = REQ_UNLINK 1041 aio_unlink = REQ_UNLINK
678 aio_rmdir = REQ_RMDIR 1042 aio_rmdir = REQ_RMDIR
1043 aio_readdir = REQ_READDIR
679 CODE: 1044 PPCODE:
680{ 1045{
681 dREQ; 1046 dREQ;
682 1047
683 req->type = ix; 1048 req->type = ix;
684 req->data = newSVsv (pathname); 1049 req->data = newSVsv (pathname);
685 req->dataptr = SvPVbyte_nolen (req->data); 1050 req->dataptr = SvPVbyte_nolen (req->data);
686 1051
687 send_req (req); 1052 REQ_SEND;
688} 1053}
689 1054
690void 1055void
691aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1056aio_link (oldpath,newpath,callback=&PL_sv_undef)
692 SV * oldpath 1057 SV * oldpath
693 SV * newpath 1058 SV * newpath
694 SV * callback 1059 SV * callback
1060 ALIAS:
1061 aio_link = REQ_LINK
1062 aio_symlink = REQ_SYMLINK
1063 aio_rename = REQ_RENAME
695 CODE: 1064 PPCODE:
696{ 1065{
697 dREQ; 1066 dREQ;
698 1067
699 req->type = REQ_SYMLINK; 1068 req->type = ix;
700 req->fh = newSVsv (oldpath); 1069 req->fh = newSVsv (oldpath);
701 req->data2ptr = SvPVbyte_nolen (req->fh); 1070 req->data2ptr = SvPVbyte_nolen (req->fh);
702 req->data = newSVsv (newpath); 1071 req->data = newSVsv (newpath);
703 req->dataptr = SvPVbyte_nolen (req->data); 1072 req->dataptr = SvPVbyte_nolen (req->data);
704 1073
705 send_req (req); 1074 REQ_SEND;
706} 1075}
707 1076
708void 1077void
1078aio_group (callback=&PL_sv_undef)
1079 SV * callback
1080 PROTOTYPE: ;&
1081 PPCODE:
1082{
1083 dREQ;
1084 req->type = REQ_GROUP;
1085 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1086}
1087
1088void
709flush() 1089flush ()
710 PROTOTYPE: 1090 PROTOTYPE:
711 CODE: 1091 CODE:
712 while (nreqs) 1092 while (nreqs)
713 { 1093 {
714 poll_wait (); 1094 poll_wait ();
… …
754 CODE: 1134 CODE:
755 RETVAL = nreqs; 1135 RETVAL = nreqs;
756 OUTPUT: 1136 OUTPUT:
757 RETVAL 1137 RETVAL
758 1138
1139MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1140
1141void
1142cancel (aio_req_ornot req)
1143 PROTOTYPE:
1144 CODE:
1145 req->cancelled = 1;
1146

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