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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.32 by root, Mon Aug 22 23:20:37 2005 UTC vs.
Revision 1.47 by root, Sun Oct 22 10:10:23 2006 UTC

… …
7 7
8#include "autoconf/config.h" 8#include "autoconf/config.h"
9 9
10#include <pthread.h> 10#include <pthread.h>
11 11
12#include <stddef.h>
13#include <errno.h>
14#include <sys/time.h>
15#include <sys/select.h>
12#include <sys/types.h> 16#include <sys/types.h>
13#include <sys/stat.h> 17#include <sys/stat.h>
14 18#include <limits.h>
15#include <unistd.h> 19#include <unistd.h>
16#include <fcntl.h> 20#include <fcntl.h>
17#include <signal.h> 21#include <signal.h>
18#include <sched.h> 22#include <sched.h>
19 23
… …
23# elif __freebsd 27# elif __freebsd
24# include <sys/socket.h> 28# include <sys/socket.h>
25# include <sys/uio.h> 29# include <sys/uio.h>
26# elif __hpux 30# elif __hpux
27# include <sys/socket.h> 31# include <sys/socket.h>
32# elif __solaris /* not yet */
33# include <sys/sendfile.h>
34# else
35# error sendfile support requested but not available
28# endif 36# endif
37#endif
38
39/* used for struct dirent, AIX doesn't provide it */
40#ifndef NAME_MAX
41# define NAME_MAX 4096
29#endif 42#endif
30 43
31#if __ia64 44#if __ia64
32# define STACKSIZE 65536 45# define STACKSIZE 65536
33#else 46#else
34# define STACKSIZE 4096 47# define STACKSIZE 8192
35#endif 48#endif
36 49
37enum { 50enum {
38 REQ_QUIT, 51 REQ_QUIT,
39 REQ_OPEN, REQ_CLOSE, 52 REQ_OPEN, REQ_CLOSE,
40 REQ_READ, REQ_WRITE, REQ_READAHEAD, 53 REQ_READ, REQ_WRITE, REQ_READAHEAD,
41 REQ_SENDFILE, 54 REQ_SENDFILE,
42 REQ_STAT, REQ_LSTAT, REQ_FSTAT, 55 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
43 REQ_FSYNC, REQ_FDATASYNC, 56 REQ_FSYNC, REQ_FDATASYNC,
44 REQ_UNLINK, REQ_RMDIR, 57 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
45 REQ_SYMLINK, 58 REQ_READDIR,
59 REQ_LINK, REQ_SYMLINK,
60 REQ_SLEEP,
61 REQ_GROUP,
46}; 62};
47 63
64#define AIO_REQ_KLASS "IO::AIO::REQ"
65#define AIO_GRP_KLASS "IO::AIO::GRP"
66
48typedef struct aio_cb { 67typedef struct aio_cb
68{
69 struct aio_cb *grp, *grp_prev, *grp_next;
70
49 struct aio_cb *volatile next; 71 struct aio_cb *volatile next;
50 72
51 int type; 73 SV *self; /* the perl counterpart of this request, if any */
52 74
53 int fd, fd2; 75 SV *data, *callback;
76 SV *fh, *fh2;
77 void *dataptr, *data2ptr;
78 Stat_t *statdata;
54 off_t offset; 79 off_t offset;
55 size_t length; 80 size_t length;
56 ssize_t result; 81 ssize_t result;
82
83 int type;
84 int fd, fd2;
85 int errorno;
86 STRLEN dataoffset;
57 mode_t mode; /* open */ 87 mode_t mode; /* open */
58 int errorno; 88 unsigned char cancelled;
59 SV *data, *callback;
60 SV *fh, *fh2;
61 void *dataptr, *data2ptr;
62 STRLEN dataoffset;
63
64 Stat_t *statdata;
65} aio_cb; 89} aio_cb;
66 90
67typedef aio_cb *aio_req; 91typedef aio_cb *aio_req;
92typedef aio_cb *aio_req_ornot;
68 93
69static int started, wanted; 94static int started, wanted;
70static volatile int nreqs; 95static volatile int nreqs;
71static int max_outstanding = 1<<30; 96static int max_outstanding = 1<<30;
72static int respipe [2]; 97static int respipe [2];
… …
76static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 101static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77 102
78static volatile aio_req reqs, reqe; /* queue start, queue end */ 103static volatile aio_req reqs, reqe; /* queue start, queue end */
79static volatile aio_req ress, rese; /* queue start, queue end */ 104static volatile aio_req ress, rese; /* queue start, queue end */
80 105
81static void free_req (aio_req req) 106static void req_free (aio_req req);
82{
83 if (req->data)
84 SvREFCNT_dec (req->data);
85 107
86 if (req->fh) 108/* must be called at most once */
87 SvREFCNT_dec (req->fh); 109static SV *req_sv (aio_req req, const char *klass)
110{
111 req->self = (SV *)newHV ();
112 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
88 113
89 if (req->fh2) 114 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
90 SvREFCNT_dec (req->fh2);
91
92 if (req->statdata)
93 Safefree (req->statdata);
94
95 if (req->callback)
96 SvREFCNT_dec (req->callback);
97
98 Safefree (req);
99} 115}
100 116
101static void 117static aio_req SvAIO_REQ (SV *sv)
102poll_wait () 118{
119 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120 croak ("object of class " AIO_REQ_KLASS " expected");
121
122 MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123
124 return mg ? (aio_req)mg->mg_ptr : 0;
125}
126
127static void poll_wait ()
103{ 128{
104 if (nreqs && !ress) 129 if (nreqs && !ress)
105 { 130 {
106 fd_set rfd; 131 fd_set rfd;
107 FD_ZERO(&rfd); 132 FD_ZERO(&rfd);
… …
109 134
110 select (respipe [0] + 1, &rfd, 0, 0, 0); 135 select (respipe [0] + 1, &rfd, 0, 0, 0);
111 } 136 }
112} 137}
113 138
114static int 139static void req_invoke (aio_req req)
115poll_cb () 140{
141 dSP;
142 int errorno = errno;
143
144 if (req->cancelled || !SvOK (req->callback))
145 return;
146
147 errno = req->errorno;
148
149 ENTER;
150 PUSHMARK (SP);
151
152 switch (req->type)
153 {
154 case REQ_READDIR:
155 {
156 SV *rv = &PL_sv_undef;
157
158 if (req->result >= 0)
159 {
160 char *buf = req->data2ptr;
161 AV *av = newAV ();
162
163 while (req->result)
164 {
165 SV *sv = newSVpv (buf, 0);
166
167 av_push (av, sv);
168 buf += SvCUR (sv) + 1;
169 req->result--;
170 }
171
172 rv = sv_2mortal (newRV_noinc ((SV *)av));
173 }
174
175 XPUSHs (rv);
176 }
177 break;
178
179 case REQ_OPEN:
180 {
181 /* convert fd to fh */
182 SV *fh;
183
184 XPUSHs (sv_2mortal (newSViv (req->result)));
185 PUTBACK;
186 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
187 SPAGAIN;
188
189 fh = SvREFCNT_inc (POPs);
190
191 PUSHMARK (SP);
192 XPUSHs (sv_2mortal (fh));
193 }
194 break;
195
196 case REQ_SLEEP:
197 case REQ_GROUP:
198 break;
199
200 default:
201 XPUSHs (sv_2mortal (newSViv (req->result)));
202 break;
203 }
204
205
206 PUTBACK;
207 call_sv (req->callback, G_VOID | G_EVAL);
208 SPAGAIN;
209
210 if (SvTRUE (ERRSV))
211 {
212 req_free (req);
213 croak (0);
214 }
215
216 LEAVE;
217
218 errno = errorno;
219}
220
221static void req_free (aio_req req)
222{
223 if (req->grp)
224 {
225 aio_req grp = req->grp;
226
227 /* unlink request */
228 req->grp_next->grp_prev = req->grp_prev;
229 req->grp_prev->grp_next = req->grp_next;
230
231 if (grp->grp_next == grp && grp->fd)
232 {
233 req_invoke (grp);
234 req_free (grp);
235 }
236 }
237
238 if (req->self)
239 {
240 sv_unmagic (req->self, PERL_MAGIC_ext);
241 SvREFCNT_dec (req->self);
242 }
243
244 if (req->data)
245 SvREFCNT_dec (req->data);
246
247 if (req->fh)
248 SvREFCNT_dec (req->fh);
249
250 if (req->fh2)
251 SvREFCNT_dec (req->fh2);
252
253 if (req->statdata)
254 Safefree (req->statdata);
255
256 if (req->callback)
257 SvREFCNT_dec (req->callback);
258
259 if (req->type == REQ_READDIR && req->result >= 0)
260 free (req->data2ptr);
261
262 Safefree (req);
263}
264
265static void req_cancel (aio_req req)
266{
267 req->cancelled = 1;
268
269 if (req->type == REQ_GROUP)
270 {
271 aio_req sub;
272
273 for (sub = req->grp_next; sub != req; sub = sub->grp_next)
274 req_cancel (sub);
275 }
276}
277
278static int poll_cb ()
116{ 279{
117 dSP; 280 dSP;
118 int count = 0; 281 int count = 0;
119 int do_croak = 0; 282 int do_croak = 0;
120 aio_req req; 283 aio_req req;
… …
146 309
147 nreqs--; 310 nreqs--;
148 311
149 if (req->type == REQ_QUIT) 312 if (req->type == REQ_QUIT)
150 started--; 313 started--;
314 else if (req->type == REQ_GROUP && req->grp_next != req)
315 {
316 req->fd = 1; /* mark request as delayed */
317 continue;
318 }
151 else 319 else
152 { 320 {
153 int errorno = errno;
154 errno = req->errorno;
155
156 if (req->type == REQ_READ) 321 if (req->type == REQ_READ)
157 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0)); 322 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158 323
159 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE)) 324 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160 SvREADONLY_off (req->data); 325 SvREADONLY_off (req->data);
… …
164 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 329 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165 PL_laststatval = req->result; 330 PL_laststatval = req->result;
166 PL_statcache = *(req->statdata); 331 PL_statcache = *(req->statdata);
167 } 332 }
168 333
169 ENTER; 334 req_invoke (req);
170 PUSHMARK (SP);
171 XPUSHs (sv_2mortal (newSViv (req->result)));
172 335
173 if (req->type == REQ_OPEN)
174 {
175 /* convert fd to fh */
176 SV *fh;
177
178 PUTBACK;
179 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
180 SPAGAIN;
181
182 fh = SvREFCNT_inc (POPs);
183
184 PUSHMARK (SP);
185 XPUSHs (sv_2mortal (fh));
186 }
187
188 if (SvOK (req->callback))
189 {
190 PUTBACK;
191 call_sv (req->callback, G_VOID | G_EVAL);
192 SPAGAIN;
193
194 if (SvTRUE (ERRSV))
195 {
196 free_req (req);
197 croak (0);
198 }
199 }
200
201 LEAVE;
202
203 errno = errorno;
204 count++; 336 count++;
205 } 337 }
206 338
207 free_req (req); 339 req_free (req);
208 } 340 }
209 341
210 return count; 342 return count;
211} 343}
212 344
213static void *aio_proc(void *arg); 345static void *aio_proc(void *arg);
214 346
215static void
216start_thread (void) 347static void start_thread (void)
217{ 348{
218 sigset_t fullsigset, oldsigset; 349 sigset_t fullsigset, oldsigset;
219 pthread_t tid; 350 pthread_t tid;
220 pthread_attr_t attr; 351 pthread_attr_t attr;
221 352
… …
230 started++; 361 started++;
231 362
232 sigprocmask (SIG_SETMASK, &oldsigset, 0); 363 sigprocmask (SIG_SETMASK, &oldsigset, 0);
233} 364}
234 365
235static void 366static void req_send (aio_req req)
236send_req (aio_req req)
237{ 367{
238 while (started < wanted && nreqs >= started) 368 while (started < wanted && nreqs >= started)
239 start_thread (); 369 start_thread ();
240 370
241 nreqs++; 371 nreqs++;
… …
265 395
266 poll_wait (); 396 poll_wait ();
267 } 397 }
268} 398}
269 399
270static void 400static void end_thread (void)
271end_thread (void)
272{ 401{
273 aio_req req; 402 aio_req req;
274 Newz (0, req, 1, aio_cb); 403 Newz (0, req, 1, aio_cb);
275 req->type = REQ_QUIT; 404 req->type = REQ_QUIT;
276 405
277 send_req (req); 406 req_send (req);
278} 407}
279 408
280static void min_parallel (int nthreads) 409static void min_parallel (int nthreads)
281{ 410{
282 if (wanted < nthreads) 411 if (wanted < nthreads)
… …
311 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 440 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312 croak ("cannot set result pipe to nonblocking mode"); 441 croak ("cannot set result pipe to nonblocking mode");
313 442
314 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 443 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315 croak ("cannot set result pipe to nonblocking mode"); 444 croak ("cannot set result pipe to nonblocking mode");
316}
317
318static void atfork_prepare (void)
319{
320 pthread_mutex_lock (&reqlock);
321 pthread_mutex_lock (&reslock);
322}
323
324static void atfork_parent (void)
325{
326 pthread_mutex_unlock (&reslock);
327 pthread_mutex_unlock (&reqlock);
328}
329
330static void atfork_child (void)
331{
332 aio_req prv;
333
334 started = 0;
335
336 while (reqs)
337 {
338 prv = reqs;
339 reqs = prv->next;
340 free_req (prv);
341 }
342
343 reqs = reqe = 0;
344
345 while (ress)
346 {
347 prv = ress;
348 ress = prv->next;
349 free_req (prv);
350 }
351
352 ress = rese = 0;
353
354 close (respipe [0]);
355 close (respipe [1]);
356 create_pipe ();
357
358 atfork_parent ();
359} 445}
360 446
361/*****************************************************************************/ 447/*****************************************************************************/
362/* work around various missing functions */ 448/* work around various missing functions */
363 449
… …
368/* 454/*
369 * make our pread/pwrite safe against themselves, but not against 455 * make our pread/pwrite safe against themselves, but not against
370 * normal read/write by using a mutex. slows down execution a lot, 456 * normal read/write by using a mutex. slows down execution a lot,
371 * but that's your problem, not mine. 457 * but that's your problem, not mine.
372 */ 458 */
373static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 459static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374 460
375static ssize_t 461static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
376pread (int fd, void *buf, size_t count, off_t offset)
377{ 462{
378 ssize_t res; 463 ssize_t res;
379 off_t ooffset; 464 off_t ooffset;
380 465
381 pthread_mutex_lock (&iolock); 466 pthread_mutex_lock (&preadwritelock);
382 ooffset = lseek (fd, 0, SEEK_CUR); 467 ooffset = lseek (fd, 0, SEEK_CUR);
383 lseek (fd, offset, SEEK_SET); 468 lseek (fd, offset, SEEK_SET);
384 res = read (fd, buf, count); 469 res = read (fd, buf, count);
385 lseek (fd, ooffset, SEEK_SET); 470 lseek (fd, ooffset, SEEK_SET);
386 pthread_mutex_unlock (&iolock); 471 pthread_mutex_unlock (&preadwritelock);
387 472
388 return res; 473 return res;
389} 474}
390 475
391static ssize_t
392pwrite (int fd, void *buf, size_t count, off_t offset) 476static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
393{ 477{
394 ssize_t res; 478 ssize_t res;
395 off_t ooffset; 479 off_t ooffset;
396 480
397 pthread_mutex_lock (&iolock); 481 pthread_mutex_lock (&preadwritelock);
398 ooffset = lseek (fd, 0, SEEK_CUR); 482 ooffset = lseek (fd, 0, SEEK_CUR);
399 lseek (fd, offset, SEEK_SET); 483 lseek (fd, offset, SEEK_SET);
400 res = write (fd, buf, count); 484 res = write (fd, buf, count);
401 lseek (fd, offset, SEEK_SET); 485 lseek (fd, offset, SEEK_SET);
402 pthread_mutex_unlock (&iolock); 486 pthread_mutex_unlock (&preadwritelock);
403 487
404 return res; 488 return res;
405} 489}
406#endif 490#endif
407 491
… …
410#endif 494#endif
411 495
412#if !HAVE_READAHEAD 496#if !HAVE_READAHEAD
413# define readahead aio_readahead 497# define readahead aio_readahead
414 498
499static ssize_t readahead (int fd, off_t offset, size_t count)
500{
415static char readahead_buf[4096]; 501 char readahead_buf[4096];
416 502
417static ssize_t
418readahead (int fd, off_t offset, size_t count)
419{
420 while (count > 0) 503 while (count > 0)
421 { 504 {
422 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 505 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423 506
424 pread (fd, readahead_buf, len, offset); 507 pread (fd, readahead_buf, len, offset);
… …
428 511
429 errno = 0; 512 errno = 0;
430} 513}
431#endif 514#endif
432 515
516#if !HAVE_READDIR_R
517# define readdir_r aio_readdir_r
518
519static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
520
521static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
522{
523 struct dirent *e;
524 int errorno;
525
526 pthread_mutex_lock (&readdirlock);
527
528 e = readdir (dirp);
529 errorno = errno;
530
531 if (e)
532 {
533 *res = ent;
534 strcpy (ent->d_name, e->d_name);
535 }
536 else
537 *res = 0;
538
539 pthread_mutex_unlock (&readdirlock);
540
541 errno = errorno;
542 return e ? 0 : -1;
543}
544#endif
545
433/* sendfile always needs emulation */ 546/* sendfile always needs emulation */
434static ssize_t
435sendfile_ (int ofd, int ifd, off_t offset, size_t count) 547static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
436{ 548{
437 ssize_t res; 549 ssize_t res;
438 550
439 if (!count) 551 if (!count)
440 return 0; 552 return 0;
441 553
554#if HAVE_SENDFILE
442#if __linux 555# if __linux
443 res = sendfile (ofd, ifd, &offset, count); 556 res = sendfile (ofd, ifd, &offset, count);
444 557
445#elif __freebsd 558# elif __freebsd
446 /* 559 /*
447 * Of course, the freebsd sendfile is a dire hack with no thoughts 560 * Of course, the freebsd sendfile is a dire hack with no thoughts
448 * wasted on making it similar to other i/o functions. 561 * wasted on making it similar to other I/O functions.
449 */ 562 */
450 { 563 {
451 off_t sbytes; 564 off_t sbytes;
452 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0); 565 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453 566
454 if (!res && errno == EAGAIN) 567 if (res < 0 && sbytes)
568 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
455 res = sbytes; 569 res = sbytes;
456 } 570 }
457 571
458#elif __hpux 572# elif __hpux
459 res = sendfile (ofd, ifd, offset, count, 0, 0); 573 res = sendfile (ofd, ifd, offset, count, 0, 0);
460 574
575# elif __solaris
576 {
577 struct sendfilevec vec;
578 size_t sbytes;
579
580 vec.sfv_fd = ifd;
581 vec.sfv_flag = 0;
582 vec.sfv_off = offset;
583 vec.sfv_len = count;
584
585 res = sendfilev (ofd, &vec, 1, &sbytes);
586
587 if (res < 0 && sbytes)
588 res = sbytes;
589 }
590
591# endif
461#else 592#else
462 res = -1; 593 res = -1;
463 errno = ENOSYS; 594 errno = ENOSYS;
464#endif 595#endif
465 596
597 if (res < 0
466 if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK)) 598 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
599#if __solaris
600 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
601#endif
602 )
603 )
467 { 604 {
468 /* emulate sendfile. this is a major pain in the ass */ 605 /* emulate sendfile. this is a major pain in the ass */
469 char *buf = malloc (4096); 606 char buf[4096];
470 res = 0; 607 res = 0;
471 608
472 for (;;) 609 while (count)
473 { 610 {
474 ssize_t cnt; 611 ssize_t cnt;
475 612
476 cnt = pread (ifd, buf, 4096, offset); 613 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
477 614
478 if (cnt <= 0) 615 if (cnt <= 0)
479 { 616 {
480 if (cnt && !res) res = -1; 617 if (cnt && !res) res = -1;
481 break; 618 break;
482 } 619 }
483 620
484 cnt = write (ofd, buf, cnt); 621 cnt = write (ofd, buf, cnt);
485 622
486 if (cnt <= 0) 623 if (cnt <= 0)
487 { 624 {
488 if (cnt && !res) res = -1; 625 if (cnt && !res) res = -1;
489 break; 626 break;
490 } 627 }
491 628
492 offset += cnt; 629 offset += cnt;
493 res += cnt; 630 res += cnt;
631 count -= cnt;
494 } 632 }
495
496 {
497 int errorno = errno;
498 free (buf);
499 errno = errorno;
500 }
501 } 633 }
502 634
503 return res; 635 return res;
636}
637
638/* read a full directory */
639static int scandir_ (const char *path, void **namesp)
640{
641 DIR *dirp = opendir (path);
642 union
643 {
644 struct dirent d;
645 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
646 } u;
647 struct dirent *entp;
648 char *name, *names;
649 int memlen = 4096;
650 int memofs = 0;
651 int res = 0;
652 int errorno;
653
654 if (!dirp)
655 return -1;
656
657 names = malloc (memlen);
658
659 for (;;)
660 {
661 errno = 0, readdir_r (dirp, &u.d, &entp);
662
663 if (!entp)
664 break;
665
666 name = entp->d_name;
667
668 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
669 {
670 int len = strlen (name) + 1;
671
672 res++;
673
674 while (memofs + len > memlen)
675 {
676 memlen *= 2;
677 names = realloc (names, memlen);
678 if (!names)
679 break;
680 }
681
682 memcpy (names + memofs, name, len);
683 memofs += len;
684 }
685 }
686
687 errorno = errno;
688 closedir (dirp);
689
690 if (errorno)
691 {
692 free (names);
693 errno = errorno;
694 res = -1;
695 }
696
697 *namesp = (void *)names;
698 return res;
504} 699}
505 700
506/*****************************************************************************/ 701/*****************************************************************************/
507 702
508static void *
509aio_proc (void *thr_arg) 703static void *aio_proc (void *thr_arg)
510{ 704{
511 aio_req req; 705 aio_req req;
512 int type; 706 int type;
513 707
514 do 708 do
… …
533 727
534 pthread_mutex_unlock (&reqlock); 728 pthread_mutex_unlock (&reqlock);
535 729
536 errno = 0; /* strictly unnecessary */ 730 errno = 0; /* strictly unnecessary */
537 731
538 type = req->type; 732 if (!req->cancelled)
539
540 switch (type) 733 switch (req->type)
541 { 734 {
542 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 735 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
543 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 736 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
544 737
545 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 738 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
546 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break; 739 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
547 740
548 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 741 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
549 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 742 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
550 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 743 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
551 744
552 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 745 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
553 case REQ_CLOSE: req->result = close (req->fd); break; 746 case REQ_CLOSE: req->result = close (req->fd); break;
554 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 747 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
555 case REQ_RMDIR: req->result = rmdir (req->dataptr); break; 748 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
749 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
750 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
556 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 751 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
557 752
558 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 753 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
559 case REQ_FSYNC: req->result = fsync (req->fd); break; 754 case REQ_FSYNC: req->result = fsync (req->fd); break;
755 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
560 756
757 case REQ_SLEEP:
758 {
759 struct timeval tv;
760
761 tv.tv_sec = req->fd;
762 tv.tv_usec = req->fd2;
763
764 req->result = select (0, 0, 0, 0, &tv);
765 }
766
561 case REQ_QUIT: 767 case REQ_QUIT:
562 break; 768 break;
563 769
564 default: 770 default:
565 req->result = ENOSYS; 771 req->result = ENOSYS;
566 break; 772 break;
567 } 773 }
568 774
569 req->errorno = errno; 775 req->errorno = errno;
570 776
571 pthread_mutex_lock (&reslock); 777 pthread_mutex_lock (&reslock);
572 778
… …
590 while (type != REQ_QUIT); 796 while (type != REQ_QUIT);
591 797
592 return 0; 798 return 0;
593} 799}
594 800
801/*****************************************************************************/
802
803static void atfork_prepare (void)
804{
805 pthread_mutex_lock (&reqlock);
806 pthread_mutex_lock (&reslock);
807#if !HAVE_PREADWRITE
808 pthread_mutex_lock (&preadwritelock);
809#endif
810#if !HAVE_READDIR_R
811 pthread_mutex_lock (&readdirlock);
812#endif
813}
814
815static void atfork_parent (void)
816{
817#if !HAVE_READDIR_R
818 pthread_mutex_unlock (&readdirlock);
819#endif
820#if !HAVE_PREADWRITE
821 pthread_mutex_unlock (&preadwritelock);
822#endif
823 pthread_mutex_unlock (&reslock);
824 pthread_mutex_unlock (&reqlock);
825}
826
827static void atfork_child (void)
828{
829 aio_req prv;
830
831 started = 0;
832
833 while (reqs)
834 {
835 prv = reqs;
836 reqs = prv->next;
837 req_free (prv);
838 }
839
840 reqs = reqe = 0;
841
842 while (ress)
843 {
844 prv = ress;
845 ress = prv->next;
846 req_free (prv);
847 }
848
849 ress = rese = 0;
850
851 close (respipe [0]);
852 close (respipe [1]);
853 create_pipe ();
854
855 atfork_parent ();
856}
857
595#define dREQ \ 858#define dREQ \
596 aio_req req; \ 859 aio_req req; \
597 \ 860 \
598 if (SvOK (callback) && !SvROK (callback)) \ 861 if (SvOK (callback) && !SvROK (callback)) \
599 croak ("clalback must be undef or of reference type"); \ 862 croak ("callback must be undef or of reference type"); \
600 \ 863 \
601 Newz (0, req, 1, aio_cb); \ 864 Newz (0, req, 1, aio_cb); \
602 if (!req) \ 865 if (!req) \
603 croak ("out of memory during aio_req allocation"); \ 866 croak ("out of memory during aio_req allocation"); \
604 \ 867 \
605 req->callback = newSVsv (callback); 868 req->callback = newSVsv (callback)
869
870#define REQ_SEND \
871 req_send (req); \
872 \
873 if (GIMME_V != G_VOID) \
874 XPUSHs (req_sv (req, AIO_REQ_KLASS));
606 875
607MODULE = IO::AIO PACKAGE = IO::AIO 876MODULE = IO::AIO PACKAGE = IO::AIO
608 877
609PROTOTYPES: ENABLE 878PROTOTYPES: ENABLE
610 879
611BOOT: 880BOOT:
612{ 881{
882 HV *stash = gv_stashpv ("IO::AIO", 1);
883 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
884 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
885 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
886
613 create_pipe (); 887 create_pipe ();
614 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 888 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
615} 889}
616 890
617void 891void
618min_parallel(nthreads) 892min_parallel (nthreads)
619 int nthreads 893 int nthreads
620 PROTOTYPE: $ 894 PROTOTYPE: $
621 895
622void 896void
623max_parallel(nthreads) 897max_parallel (nthreads)
624 int nthreads 898 int nthreads
625 PROTOTYPE: $ 899 PROTOTYPE: $
626 900
627int 901int
628max_outstanding(nreqs) 902max_outstanding (nreqs)
629 int nreqs 903 int nreqs
630 PROTOTYPE: $ 904 PROTOTYPE: $
631 CODE: 905 CODE:
632 RETVAL = max_outstanding; 906 RETVAL = max_outstanding;
633 max_outstanding = nreqs; 907 max_outstanding = nreqs;
634 908
635void 909void
636aio_open(pathname,flags,mode,callback=&PL_sv_undef) 910aio_open (pathname,flags,mode,callback=&PL_sv_undef)
637 SV * pathname 911 SV * pathname
638 int flags 912 int flags
639 int mode 913 int mode
640 SV * callback 914 SV * callback
641 PROTOTYPE: $$$;$ 915 PROTOTYPE: $$$;$
642 CODE: 916 PPCODE:
643{ 917{
644 dREQ; 918 dREQ;
645 919
646 req->type = REQ_OPEN; 920 req->type = REQ_OPEN;
647 req->data = newSVsv (pathname); 921 req->data = newSVsv (pathname);
648 req->dataptr = SvPVbyte_nolen (req->data); 922 req->dataptr = SvPVbyte_nolen (req->data);
649 req->fd = flags; 923 req->fd = flags;
650 req->mode = mode; 924 req->mode = mode;
651 925
652 send_req (req); 926 REQ_SEND;
653} 927}
654 928
655void 929void
656aio_close(fh,callback=&PL_sv_undef) 930aio_close (fh,callback=&PL_sv_undef)
657 SV * fh 931 SV * fh
658 SV * callback 932 SV * callback
659 PROTOTYPE: $;$ 933 PROTOTYPE: $;$
660 ALIAS: 934 ALIAS:
661 aio_close = REQ_CLOSE 935 aio_close = REQ_CLOSE
662 aio_fsync = REQ_FSYNC 936 aio_fsync = REQ_FSYNC
663 aio_fdatasync = REQ_FDATASYNC 937 aio_fdatasync = REQ_FDATASYNC
664 CODE: 938 PPCODE:
665{ 939{
666 dREQ; 940 dREQ;
667 941
668 req->type = ix; 942 req->type = ix;
669 req->fh = newSVsv (fh); 943 req->fh = newSVsv (fh);
670 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 944 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
671 945
672 send_req (req); 946 REQ_SEND (req);
673} 947}
674 948
675void 949void
676aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 950aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
677 SV * fh 951 SV * fh
678 UV offset 952 UV offset
679 UV length 953 UV length
680 SV * data 954 SV * data
681 UV dataoffset 955 UV dataoffset
682 SV * callback 956 SV * callback
683 ALIAS: 957 ALIAS:
684 aio_read = REQ_READ 958 aio_read = REQ_READ
685 aio_write = REQ_WRITE 959 aio_write = REQ_WRITE
686 PROTOTYPE: $$$$$;$ 960 PROTOTYPE: $$$$$;$
687 CODE: 961 PPCODE:
688{ 962{
689 aio_req req; 963 aio_req req;
690 STRLEN svlen; 964 STRLEN svlen;
691 char *svptr = SvPVbyte (data, svlen); 965 char *svptr = SvPVbyte (data, svlen);
692 966
… …
730 { 1004 {
731 SvREADONLY_on (data); 1005 SvREADONLY_on (data);
732 req->data2ptr = (void *)data; 1006 req->data2ptr = (void *)data;
733 } 1007 }
734 1008
735 send_req (req); 1009 REQ_SEND;
736 } 1010 }
737} 1011}
738 1012
739void 1013void
740aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef) 1014aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
741 SV * out_fh 1015 SV * out_fh
742 SV * in_fh 1016 SV * in_fh
743 UV in_offset 1017 UV in_offset
744 UV length 1018 UV length
745 SV * callback 1019 SV * callback
746 PROTOTYPE: $$$$;$ 1020 PROTOTYPE: $$$$;$
747 CODE: 1021 PPCODE:
748{ 1022{
749 dREQ; 1023 dREQ;
750 1024
751 req->type = REQ_SENDFILE; 1025 req->type = REQ_SENDFILE;
752 req->fh = newSVsv (out_fh); 1026 req->fh = newSVsv (out_fh);
… …
754 req->fh2 = newSVsv (in_fh); 1028 req->fh2 = newSVsv (in_fh);
755 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh))); 1029 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
756 req->offset = in_offset; 1030 req->offset = in_offset;
757 req->length = length; 1031 req->length = length;
758 1032
759 send_req (req); 1033 REQ_SEND;
760} 1034}
761 1035
762void 1036void
763aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1037aio_readahead (fh,offset,length,callback=&PL_sv_undef)
764 SV * fh 1038 SV * fh
765 UV offset 1039 UV offset
766 IV length 1040 IV length
767 SV * callback 1041 SV * callback
768 PROTOTYPE: $$$;$ 1042 PROTOTYPE: $$$;$
769 CODE: 1043 PPCODE:
770{ 1044{
771 dREQ; 1045 dREQ;
772 1046
773 req->type = REQ_READAHEAD; 1047 req->type = REQ_READAHEAD;
774 req->fh = newSVsv (fh); 1048 req->fh = newSVsv (fh);
775 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1049 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
776 req->offset = offset; 1050 req->offset = offset;
777 req->length = length; 1051 req->length = length;
778 1052
779 send_req (req); 1053 REQ_SEND;
780} 1054}
781 1055
782void 1056void
783aio_stat(fh_or_path,callback=&PL_sv_undef) 1057aio_stat (fh_or_path,callback=&PL_sv_undef)
784 SV * fh_or_path 1058 SV * fh_or_path
785 SV * callback 1059 SV * callback
786 ALIAS: 1060 ALIAS:
787 aio_stat = REQ_STAT 1061 aio_stat = REQ_STAT
788 aio_lstat = REQ_LSTAT 1062 aio_lstat = REQ_LSTAT
789 CODE: 1063 PPCODE:
790{ 1064{
791 dREQ; 1065 dREQ;
792 1066
793 New (0, req->statdata, 1, Stat_t); 1067 New (0, req->statdata, 1, Stat_t);
794 if (!req->statdata) 1068 if (!req->statdata)
795 { 1069 {
796 free_req (req); 1070 req_free (req);
797 croak ("out of memory during aio_req->statdata allocation"); 1071 croak ("out of memory during aio_req->statdata allocation");
798 } 1072 }
799 1073
800 if (SvPOK (fh_or_path)) 1074 if (SvPOK (fh_or_path))
801 { 1075 {
… …
808 req->type = REQ_FSTAT; 1082 req->type = REQ_FSTAT;
809 req->fh = newSVsv (fh_or_path); 1083 req->fh = newSVsv (fh_or_path);
810 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1084 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
811 } 1085 }
812 1086
813 send_req (req); 1087 REQ_SEND;
814} 1088}
815 1089
816void 1090void
817aio_unlink(pathname,callback=&PL_sv_undef) 1091aio_unlink (pathname,callback=&PL_sv_undef)
818 SV * pathname 1092 SV * pathname
819 SV * callback 1093 SV * callback
820 ALIAS: 1094 ALIAS:
821 aio_unlink = REQ_UNLINK 1095 aio_unlink = REQ_UNLINK
822 aio_rmdir = REQ_RMDIR 1096 aio_rmdir = REQ_RMDIR
1097 aio_readdir = REQ_READDIR
823 CODE: 1098 PPCODE:
824{ 1099{
825 dREQ; 1100 dREQ;
826 1101
827 req->type = ix; 1102 req->type = ix;
828 req->data = newSVsv (pathname); 1103 req->data = newSVsv (pathname);
829 req->dataptr = SvPVbyte_nolen (req->data); 1104 req->dataptr = SvPVbyte_nolen (req->data);
830 1105
831 send_req (req); 1106 REQ_SEND;
832} 1107}
833 1108
834void 1109void
835aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1110aio_link (oldpath,newpath,callback=&PL_sv_undef)
836 SV * oldpath 1111 SV * oldpath
837 SV * newpath 1112 SV * newpath
838 SV * callback 1113 SV * callback
1114 ALIAS:
1115 aio_link = REQ_LINK
1116 aio_symlink = REQ_SYMLINK
1117 aio_rename = REQ_RENAME
839 CODE: 1118 PPCODE:
840{ 1119{
841 dREQ; 1120 dREQ;
842 1121
843 req->type = REQ_SYMLINK; 1122 req->type = ix;
844 req->fh = newSVsv (oldpath); 1123 req->fh = newSVsv (oldpath);
845 req->data2ptr = SvPVbyte_nolen (req->fh); 1124 req->data2ptr = SvPVbyte_nolen (req->fh);
846 req->data = newSVsv (newpath); 1125 req->data = newSVsv (newpath);
847 req->dataptr = SvPVbyte_nolen (req->data); 1126 req->dataptr = SvPVbyte_nolen (req->data);
848 1127
849 send_req (req); 1128 REQ_SEND;
850} 1129}
851 1130
852void 1131void
1132aio_sleep (delay,callback=&PL_sv_undef)
1133 double delay
1134 SV * callback
1135 PPCODE:
1136{
1137 dREQ;
1138
1139 req->type = REQ_SLEEP;
1140 req->fd = delay < 0. ? 0 : delay;
1141 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1142
1143 REQ_SEND;
1144}
1145
1146void
1147aio_group (callback=&PL_sv_undef)
1148 SV * callback
1149 PROTOTYPE: ;$
1150 PPCODE:
1151{
1152 dREQ;
1153 req->type = REQ_GROUP;
1154 req->grp_next = req;
1155 req->grp_prev = req;
1156
1157 req_send (req);
1158 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1159}
1160
1161void
853flush() 1162flush ()
854 PROTOTYPE: 1163 PROTOTYPE:
855 CODE: 1164 CODE:
856 while (nreqs) 1165 while (nreqs)
857 { 1166 {
858 poll_wait (); 1167 poll_wait ();
… …
898 CODE: 1207 CODE:
899 RETVAL = nreqs; 1208 RETVAL = nreqs;
900 OUTPUT: 1209 OUTPUT:
901 RETVAL 1210 RETVAL
902 1211
1212MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1213
1214void
1215cancel (aio_req_ornot req)
1216 PROTOTYPE:
1217 CODE:
1218 req_cancel (req);
1219
1220MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1221
1222void
1223add (aio_req grp, ...)
1224 PROTOTYPE: $;@
1225 PPCODE:
1226{
1227 int i;
1228
1229 for (i = 1; i < items; ++i )
1230 {
1231 if (GIMME_V != G_VOID)
1232 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1233
1234 aio_req req = SvAIO_REQ (ST (i));
1235
1236 if (req)
1237 {
1238 req->grp_prev = grp;
1239 req->grp_next = grp->grp_next;
1240 grp->grp_next->grp_prev = req;
1241 grp->grp_next = req;
1242
1243 req->grp = grp;
1244 }
1245 }
1246}
1247

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