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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.22 by root, Tue Aug 16 22:22:18 2005 UTC vs.
Revision 1.46 by root, Sun Oct 22 00:49:29 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>
14#include <sys/time.h>
15#include <sys/select.h>
10#include <sys/types.h> 16#include <sys/types.h>
11#include <sys/stat.h> 17#include <sys/stat.h>
12 18#include <limits.h>
13#include <unistd.h> 19#include <unistd.h>
14#include <fcntl.h> 20#include <fcntl.h>
15#include <signal.h> 21#include <signal.h>
16#include <sched.h> 22#include <sched.h>
17 23
18#include <pthread.h> 24#if HAVE_SENDFILE
25# if __linux
26# include <sys/sendfile.h>
27# elif __freebsd
28# include <sys/socket.h>
29# include <sys/uio.h>
30# elif __hpux
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
36# endif
37#endif
19 38
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 39/* used for struct dirent, AIX doesn't provide it */
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 40#ifndef NAME_MAX
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 41# define NAME_MAX 4096
42#endif
23 43
24#if __ia64 44#if __ia64
25# define STACKSIZE 65536 45# define STACKSIZE 65536
26#else 46#else
27# define STACKSIZE 4096 47# define STACKSIZE 8192
28#endif 48#endif
29 49
30enum { 50enum {
31 REQ_QUIT, 51 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 52 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 53 REQ_READ, REQ_WRITE, REQ_READAHEAD,
54 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, 55 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 56 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR, REQ_SYMLINK, 57 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37 REQ_SYMLINK, 58 REQ_READDIR,
59 REQ_LINK, REQ_SYMLINK,
60 REQ_SLEEP,
61 REQ_GROUP,
38}; 62};
39 63
64#define AIO_REQ_KLASS "IO::AIO::REQ"
65#define AIO_GRP_KLASS "IO::AIO::GRP"
66
40typedef struct aio_cb { 67typedef struct aio_cb
68{
69 struct aio_cb *grp, *grp_prev, *grp_next;
70
41 struct aio_cb *volatile next; 71 struct aio_cb *volatile next;
42 72
43 int type; 73 SV *self; /* the perl counterpart of this request, if any */
44 74
45 int fd; 75 SV *data, *callback;
76 SV *fh, *fh2;
77 void *dataptr, *data2ptr;
78 Stat_t *statdata;
46 off_t offset; 79 off_t offset;
47 size_t length; 80 size_t length;
48 ssize_t result; 81 ssize_t result;
82
83 int type;
84 int fd, fd2;
85 int errorno;
86 STRLEN dataoffset;
49 mode_t mode; /* open */ 87 mode_t mode; /* open */
50 int errorno; 88 unsigned char cancelled;
51 SV *data, *callback, *fh;
52 void *dataptr, *data2ptr;
53 STRLEN dataoffset;
54
55 Stat_t *statdata;
56} aio_cb; 89} aio_cb;
57 90
58typedef aio_cb *aio_req; 91typedef aio_cb *aio_req;
92typedef aio_cb *aio_req_ornot;
59 93
60static int started; 94static int started, wanted;
61static volatile int nreqs; 95static volatile int nreqs;
62static int max_outstanding = 1<<30; 96static int max_outstanding = 1<<30;
63static int respipe [2]; 97static int respipe [2];
64 98
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 99static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 100static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 101static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69 102
70static volatile aio_req reqs, reqe; /* queue start, queue end */ 103static volatile aio_req reqs, reqe; /* queue start, queue end */
71static volatile aio_req ress, rese; /* queue start, queue end */ 104static volatile aio_req ress, rese; /* queue start, queue end */
72 105
73static void 106static void req_free (aio_req req);
74poll_wait () 107
108/* must be called at most once */
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);
113
114 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
115}
116
117static aio_req SvAIO_REQ (SV *sv)
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 ()
75{ 128{
76 if (nreqs && !ress) 129 if (nreqs && !ress)
77 { 130 {
78 fd_set rfd; 131 fd_set rfd;
79 FD_ZERO(&rfd); 132 FD_ZERO(&rfd);
… …
81 134
82 select (respipe [0] + 1, &rfd, 0, 0, 0); 135 select (respipe [0] + 1, &rfd, 0, 0, 0);
83 } 136 }
84} 137}
85 138
86static int 139static void req_invoke (aio_req req)
87poll_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 ()
88{ 279{
89 dSP; 280 dSP;
90 int count = 0; 281 int count = 0;
282 int do_croak = 0;
91 aio_req req, prv; 283 aio_req req;
92 284
285 for (;;)
286 {
93 pthread_mutex_lock (&reslock); 287 pthread_mutex_lock (&reslock);
288 req = ress;
94 289
95 { 290 if (req)
291 {
292 ress = req->next;
293
294 if (!ress)
295 {
96 /* read any signals sent by the worker threads */ 296 /* read any signals sent by the worker threads */
97 char buf [32]; 297 char buf [32];
98 while (read (respipe [0], buf, 32) == 32) 298 while (read (respipe [0], buf, 32) == 32)
299 ;
300
301 rese = 0;
302 }
99 ; 303 }
100 }
101 304
102 req = ress;
103 ress = rese = 0;
104
105 pthread_mutex_unlock (&reslock); 305 pthread_mutex_unlock (&reslock);
106 306
107 while (req) 307 if (!req)
108 { 308 break;
309
109 nreqs--; 310 nreqs--;
110 311
111 if (req->type == REQ_QUIT) 312 if (req->type == REQ_QUIT)
112 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 }
113 else 319 else
114 { 320 {
115 int errorno = errno;
116 errno = req->errorno;
117
118 if (req->type == REQ_READ) 321 if (req->type == REQ_READ)
119 SvCUR_set (req->data, req->dataoffset 322 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
120 + req->result > 0 ? req->result : 0);
121 323
324 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
325 SvREADONLY_off (req->data);
326
122 if (req->data) 327 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 { 328 {
130 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 329 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131 PL_laststatval = req->result; 330 PL_laststatval = req->result;
132 PL_statcache = *(req->statdata); 331 PL_statcache = *(req->statdata);
133
134 Safefree (req->statdata);
135 } 332 }
136 333
137 ENTER; 334 req_invoke (req);
138 PUSHMARK (SP);
139 XPUSHs (sv_2mortal (newSViv (req->result)));
140 335
141 if (req->type == REQ_OPEN)
142 {
143 /* convert fd to fh */
144 SV *fh;
145
146 PUTBACK;
147 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
148 SPAGAIN;
149
150 fh = SvREFCNT_inc (POPs);
151
152 PUSHMARK (SP);
153 XPUSHs (sv_2mortal (fh));
154 }
155
156 if (SvOK (req->callback))
157 {
158 PUTBACK;
159 call_sv (req->callback, G_VOID | G_EVAL);
160 SPAGAIN;
161 }
162
163 LEAVE;
164
165 if (req->callback)
166 SvREFCNT_dec (req->callback);
167
168 errno = errorno;
169 count++; 336 count++;
170 } 337 }
171 338
172 prv = req;
173 req = req->next;
174 Safefree (prv); 339 req_free (req);
175
176 /* TODO: croak on errors? */
177 } 340 }
178 341
179 return count; 342 return count;
180} 343}
181 344
182static void *aio_proc(void *arg); 345static void *aio_proc(void *arg);
183 346
184static void
185start_thread (void) 347static void start_thread (void)
186{ 348{
187 sigset_t fullsigset, oldsigset; 349 sigset_t fullsigset, oldsigset;
188 pthread_t tid; 350 pthread_t tid;
189 pthread_attr_t attr; 351 pthread_attr_t attr;
190 352
… …
199 started++; 361 started++;
200 362
201 sigprocmask (SIG_SETMASK, &oldsigset, 0); 363 sigprocmask (SIG_SETMASK, &oldsigset, 0);
202} 364}
203 365
204static void 366static void req_send (aio_req req)
205send_req (aio_req req)
206{ 367{
368 while (started < wanted && nreqs >= started)
369 start_thread ();
370
207 nreqs++; 371 nreqs++;
208 372
209 pthread_mutex_lock (&reqlock); 373 pthread_mutex_lock (&reqlock);
210 374
211 req->next = 0; 375 req->next = 0;
… …
219 reqe = reqs = req; 383 reqe = reqs = req;
220 384
221 pthread_cond_signal (&reqwait); 385 pthread_cond_signal (&reqwait);
222 pthread_mutex_unlock (&reqlock); 386 pthread_mutex_unlock (&reqlock);
223 387
224 while (nreqs > max_outstanding) 388 if (nreqs > max_outstanding)
389 for (;;)
390 {
391 poll_cb ();
392
393 if (nreqs <= max_outstanding)
394 break;
395
396 poll_wait ();
397 }
398}
399
400static void end_thread (void)
401{
402 aio_req req;
403 Newz (0, req, 1, aio_cb);
404 req->type = REQ_QUIT;
405
406 req_send (req);
407}
408
409static void min_parallel (int nthreads)
410{
411 if (wanted < nthreads)
412 wanted = nthreads;
413}
414
415static void max_parallel (int nthreads)
416{
417 int cur = started;
418
419 if (wanted > nthreads)
420 wanted = nthreads;
421
422 while (cur > wanted)
423 {
424 end_thread ();
425 cur--;
426 }
427
428 while (started > wanted)
225 { 429 {
226 poll_wait (); 430 poll_wait ();
227 poll_cb (); 431 poll_cb ();
228 } 432 }
229} 433}
230 434
231static void 435static void create_pipe ()
232end_thread (void)
233{ 436{
234 aio_req req; 437 if (pipe (respipe))
235 New (0, req, 1, aio_cb); 438 croak ("unable to initialize result pipe");
236 req->type = REQ_QUIT;
237 439
238 send_req (req); 440 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
239} 441 croak ("cannot set result pipe to nonblocking mode");
240 442
241 443 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
242static void min_parallel (int nthreads) 444 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} 445}
313 446
314/*****************************************************************************/ 447/*****************************************************************************/
315/* work around various missing functions */ 448/* work around various missing functions */
316 449
… …
321/* 454/*
322 * make our pread/pwrite safe against themselves, but not against 455 * make our pread/pwrite safe against themselves, but not against
323 * 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,
324 * but that's your problem, not mine. 457 * but that's your problem, not mine.
325 */ 458 */
326static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 459static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
327 460
328static ssize_t 461static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
329pread (int fd, void *buf, size_t count, off_t offset)
330{ 462{
331 ssize_t res; 463 ssize_t res;
332 off_t ooffset; 464 off_t ooffset;
333 465
334 pthread_mutex_lock (&iolock); 466 pthread_mutex_lock (&preadwritelock);
335 ooffset = lseek (fd, 0, SEEK_CUR); 467 ooffset = lseek (fd, 0, SEEK_CUR);
336 lseek (fd, offset, SEEK_SET); 468 lseek (fd, offset, SEEK_SET);
337 res = read (fd, buf, count); 469 res = read (fd, buf, count);
338 lseek (fd, ooffset, SEEK_SET); 470 lseek (fd, ooffset, SEEK_SET);
339 pthread_mutex_unlock (&iolock); 471 pthread_mutex_unlock (&preadwritelock);
340 472
341 return res; 473 return res;
342} 474}
343 475
344static ssize_t
345pwrite (int fd, void *buf, size_t count, off_t offset) 476static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
346{ 477{
347 ssize_t res; 478 ssize_t res;
348 off_t ooffset; 479 off_t ooffset;
349 480
350 pthread_mutex_lock (&iolock); 481 pthread_mutex_lock (&preadwritelock);
351 ooffset = lseek (fd, 0, SEEK_CUR); 482 ooffset = lseek (fd, 0, SEEK_CUR);
352 lseek (fd, offset, SEEK_SET); 483 lseek (fd, offset, SEEK_SET);
353 res = write (fd, buf, count); 484 res = write (fd, buf, count);
354 lseek (fd, offset, SEEK_SET); 485 lseek (fd, offset, SEEK_SET);
355 pthread_mutex_unlock (&iolock); 486 pthread_mutex_unlock (&preadwritelock);
356 487
357 return res; 488 return res;
358} 489}
359#endif 490#endif
360 491
… …
363#endif 494#endif
364 495
365#if !HAVE_READAHEAD 496#if !HAVE_READAHEAD
366# define readahead aio_readahead 497# define readahead aio_readahead
367 498
499static ssize_t readahead (int fd, off_t offset, size_t count)
500{
368static char readahead_buf[4096]; 501 char readahead_buf[4096];
369 502
370static ssize_t
371readahead (int fd, off_t offset, size_t count)
372{
373 while (count > 0) 503 while (count > 0)
374 { 504 {
375 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 505 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
376 506
377 pread (fd, readahead_buf, len, offset); 507 pread (fd, readahead_buf, len, offset);
… …
381 511
382 errno = 0; 512 errno = 0;
383} 513}
384#endif 514#endif
385 515
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
546/* sendfile always needs emulation */
547static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
548{
549 ssize_t res;
550
551 if (!count)
552 return 0;
553
554#if HAVE_SENDFILE
555# if __linux
556 res = sendfile (ofd, ifd, &offset, count);
557
558# elif __freebsd
559 /*
560 * Of course, the freebsd sendfile is a dire hack with no thoughts
561 * wasted on making it similar to other I/O functions.
562 */
563 {
564 off_t sbytes;
565 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
566
567 if (res < 0 && sbytes)
568 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
569 res = sbytes;
570 }
571
572# elif __hpux
573 res = sendfile (ofd, ifd, offset, count, 0, 0);
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
592#else
593 res = -1;
594 errno = ENOSYS;
595#endif
596
597 if (res < 0
598 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
599#if __solaris
600 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
601#endif
602 )
603 )
604 {
605 /* emulate sendfile. this is a major pain in the ass */
606 char buf[4096];
607 res = 0;
608
609 while (count)
610 {
611 ssize_t cnt;
612
613 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
614
615 if (cnt <= 0)
616 {
617 if (cnt && !res) res = -1;
618 break;
619 }
620
621 cnt = write (ofd, buf, cnt);
622
623 if (cnt <= 0)
624 {
625 if (cnt && !res) res = -1;
626 break;
627 }
628
629 offset += cnt;
630 res += cnt;
631 count -= cnt;
632 }
633 }
634
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;
699}
700
386/*****************************************************************************/ 701/*****************************************************************************/
387 702
388static void *
389aio_proc (void *thr_arg) 703static void *aio_proc (void *thr_arg)
390{ 704{
391 aio_req req; 705 aio_req req;
392 int type; 706 int type;
393 707
394 do 708 do
… …
413 727
414 pthread_mutex_unlock (&reqlock); 728 pthread_mutex_unlock (&reqlock);
415 729
416 errno = 0; /* strictly unnecessary */ 730 errno = 0; /* strictly unnecessary */
417 731
418 type = req->type; 732 if (!req->cancelled)
419
420 switch (type) 733 switch (req->type)
421 { 734 {
422 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;
423 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;
424 737
425 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;
739 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
426 740
427 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 741 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
428 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 742 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
429 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 743 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430 744
431 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;
432 case REQ_CLOSE: req->result = close (req->fd); break; 746 case REQ_CLOSE: req->result = close (req->fd); break;
433 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 747 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434 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;
435 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 751 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
436 752
437 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 753 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438 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;
439 756
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
440 case REQ_QUIT: 767 case REQ_QUIT:
441 break; 768 break;
442 769
443 default: 770 default:
444 req->result = ENOSYS; 771 req->result = ENOSYS;
445 break; 772 break;
446 } 773 }
447 774
448 req->errorno = errno; 775 req->errorno = errno;
449 776
450 pthread_mutex_lock (&reslock); 777 pthread_mutex_lock (&reslock);
451 778
… …
469 while (type != REQ_QUIT); 796 while (type != REQ_QUIT);
470 797
471 return 0; 798 return 0;
472} 799}
473 800
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
474#define dREQ \ 858#define dREQ \
475 aio_req req; \ 859 aio_req req; \
476 \ 860 \
477 if (SvOK (callback) && !SvROK (callback)) \ 861 if (SvOK (callback) && !SvROK (callback)) \
478 croak ("clalback must be undef or of reference type"); \ 862 croak ("callback must be undef or of reference type"); \
479 \ 863 \
480 Newz (0, req, 1, aio_cb); \ 864 Newz (0, req, 1, aio_cb); \
481 if (!req) \ 865 if (!req) \
482 croak ("out of memory during aio_req allocation"); \ 866 croak ("out of memory during aio_req allocation"); \
483 \ 867 \
484 req->callback = SvREFCNT_inc (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));
485 875
486MODULE = IO::AIO PACKAGE = IO::AIO 876MODULE = IO::AIO PACKAGE = IO::AIO
487 877
488PROTOTYPES: ENABLE 878PROTOTYPES: ENABLE
489 879
490BOOT: 880BOOT:
491{ 881{
492 if (pipe (respipe)) 882 HV *stash = gv_stashpv ("IO::AIO", 1);
493 croak ("unable to initialize result pipe"); 883 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
884 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
885 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
494 886
495 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 887 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); 888 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
502} 889}
503 890
504void 891void
505min_parallel(nthreads) 892min_parallel (nthreads)
506 int nthreads 893 int nthreads
507 PROTOTYPE: $ 894 PROTOTYPE: $
508 895
509void 896void
510max_parallel(nthreads) 897max_parallel (nthreads)
511 int nthreads 898 int nthreads
512 PROTOTYPE: $ 899 PROTOTYPE: $
513 900
514int 901int
515max_outstanding(nreqs) 902max_outstanding (nreqs)
516 int nreqs 903 int nreqs
517 PROTOTYPE: $ 904 PROTOTYPE: $
518 CODE: 905 CODE:
519 RETVAL = max_outstanding; 906 RETVAL = max_outstanding;
520 max_outstanding = nreqs; 907 max_outstanding = nreqs;
521 908
522void 909void
523aio_open(pathname,flags,mode,callback=&PL_sv_undef) 910aio_open (pathname,flags,mode,callback=&PL_sv_undef)
524 SV * pathname 911 SV * pathname
525 int flags 912 int flags
526 int mode 913 int mode
527 SV * callback 914 SV * callback
528 PROTOTYPE: $$$;$ 915 PROTOTYPE: $$$;$
529 CODE: 916 PPCODE:
530{ 917{
531 dREQ; 918 dREQ;
532 919
533 req->type = REQ_OPEN; 920 req->type = REQ_OPEN;
534 req->data = newSVsv (pathname); 921 req->data = newSVsv (pathname);
535 req->dataptr = SvPVbyte_nolen (req->data); 922 req->dataptr = SvPVbyte_nolen (req->data);
536 req->fd = flags; 923 req->fd = flags;
537 req->mode = mode; 924 req->mode = mode;
538 925
539 send_req (req); 926 REQ_SEND;
540} 927}
541 928
542void 929void
543aio_close(fh,callback=&PL_sv_undef) 930aio_close (fh,callback=&PL_sv_undef)
544 SV * fh 931 SV * fh
545 SV * callback 932 SV * callback
546 PROTOTYPE: $;$ 933 PROTOTYPE: $;$
547 ALIAS: 934 ALIAS:
548 aio_close = REQ_CLOSE 935 aio_close = REQ_CLOSE
549 aio_fsync = REQ_FSYNC 936 aio_fsync = REQ_FSYNC
550 aio_fdatasync = REQ_FDATASYNC 937 aio_fdatasync = REQ_FDATASYNC
551 CODE: 938 PPCODE:
552{ 939{
553 dREQ; 940 dREQ;
554 941
555 req->type = ix; 942 req->type = ix;
556 req->fh = newSVsv (fh); 943 req->fh = newSVsv (fh);
557 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 944 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
558 945
559 send_req (req); 946 REQ_SEND (req);
560} 947}
561 948
562void 949void
563aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 950aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
564 SV * fh 951 SV * fh
565 UV offset 952 UV offset
566 IV length 953 UV length
567 SV * data 954 SV * data
568 IV dataoffset 955 UV dataoffset
569 SV * callback 956 SV * callback
570 ALIAS: 957 ALIAS:
571 aio_read = REQ_READ 958 aio_read = REQ_READ
572 aio_write = REQ_WRITE 959 aio_write = REQ_WRITE
573 PROTOTYPE: $$$$$;$ 960 PROTOTYPE: $$$$$;$
574 CODE: 961 PPCODE:
575{ 962{
576 aio_req req; 963 aio_req req;
577 STRLEN svlen; 964 STRLEN svlen;
578 char *svptr = SvPVbyte (data, svlen); 965 char *svptr = SvPVbyte (data, svlen);
579 966
… …
610 : IoOFP (sv_2io (fh))); 997 : IoOFP (sv_2io (fh)));
611 req->offset = offset; 998 req->offset = offset;
612 req->length = length; 999 req->length = length;
613 req->data = SvREFCNT_inc (data); 1000 req->data = SvREFCNT_inc (data);
614 req->dataptr = (char *)svptr + dataoffset; 1001 req->dataptr = (char *)svptr + dataoffset;
615 req->callback = SvREFCNT_inc (callback);
616 1002
617 send_req (req); 1003 if (!SvREADONLY (data))
1004 {
1005 SvREADONLY_on (data);
1006 req->data2ptr = (void *)data;
1007 }
1008
1009 REQ_SEND;
618 } 1010 }
619} 1011}
620 1012
621void 1013void
1014aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1015 SV * out_fh
1016 SV * in_fh
1017 UV in_offset
1018 UV length
1019 SV * callback
1020 PROTOTYPE: $$$$;$
1021 PPCODE:
1022{
1023 dREQ;
1024
1025 req->type = REQ_SENDFILE;
1026 req->fh = newSVsv (out_fh);
1027 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1028 req->fh2 = newSVsv (in_fh);
1029 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1030 req->offset = in_offset;
1031 req->length = length;
1032
1033 REQ_SEND;
1034}
1035
1036void
622aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1037aio_readahead (fh,offset,length,callback=&PL_sv_undef)
623 SV * fh 1038 SV * fh
624 UV offset 1039 UV offset
625 IV length 1040 IV length
626 SV * callback 1041 SV * callback
627 PROTOTYPE: $$$;$ 1042 PROTOTYPE: $$$;$
628 CODE: 1043 PPCODE:
629{ 1044{
630 dREQ; 1045 dREQ;
631 1046
632 req->type = REQ_READAHEAD; 1047 req->type = REQ_READAHEAD;
633 req->fh = newSVsv (fh); 1048 req->fh = newSVsv (fh);
634 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1049 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
635 req->offset = offset; 1050 req->offset = offset;
636 req->length = length; 1051 req->length = length;
637 1052
638 send_req (req); 1053 REQ_SEND;
639} 1054}
640 1055
641void 1056void
642aio_stat(fh_or_path,callback=&PL_sv_undef) 1057aio_stat (fh_or_path,callback=&PL_sv_undef)
643 SV * fh_or_path 1058 SV * fh_or_path
644 SV * callback 1059 SV * callback
645 ALIAS: 1060 ALIAS:
646 aio_stat = REQ_STAT 1061 aio_stat = REQ_STAT
647 aio_lstat = REQ_LSTAT 1062 aio_lstat = REQ_LSTAT
648 CODE: 1063 PPCODE:
649{ 1064{
650 dREQ; 1065 dREQ;
651 1066
652 New (0, req->statdata, 1, Stat_t); 1067 New (0, req->statdata, 1, Stat_t);
653 if (!req->statdata) 1068 if (!req->statdata)
1069 {
1070 req_free (req);
654 croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)"); 1071 croak ("out of memory during aio_req->statdata allocation");
1072 }
655 1073
656 if (SvPOK (fh_or_path)) 1074 if (SvPOK (fh_or_path))
657 { 1075 {
658 req->type = ix; 1076 req->type = ix;
659 req->data = newSVsv (fh_or_path); 1077 req->data = newSVsv (fh_or_path);
… …
664 req->type = REQ_FSTAT; 1082 req->type = REQ_FSTAT;
665 req->fh = newSVsv (fh_or_path); 1083 req->fh = newSVsv (fh_or_path);
666 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1084 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
667 } 1085 }
668 1086
669 send_req (req); 1087 REQ_SEND;
670} 1088}
671 1089
672void 1090void
673aio_unlink(pathname,callback=&PL_sv_undef) 1091aio_unlink (pathname,callback=&PL_sv_undef)
674 SV * pathname 1092 SV * pathname
675 SV * callback 1093 SV * callback
676 ALIAS: 1094 ALIAS:
677 aio_unlink = REQ_UNLINK 1095 aio_unlink = REQ_UNLINK
678 aio_rmdir = REQ_RMDIR 1096 aio_rmdir = REQ_RMDIR
1097 aio_readdir = REQ_READDIR
679 CODE: 1098 PPCODE:
680{ 1099{
681 dREQ; 1100 dREQ;
682 1101
683 req->type = ix; 1102 req->type = ix;
684 req->data = newSVsv (pathname); 1103 req->data = newSVsv (pathname);
685 req->dataptr = SvPVbyte_nolen (req->data); 1104 req->dataptr = SvPVbyte_nolen (req->data);
686 1105
687 send_req (req); 1106 REQ_SEND;
688} 1107}
689 1108
690void 1109void
691aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1110aio_link (oldpath,newpath,callback=&PL_sv_undef)
692 SV * oldpath 1111 SV * oldpath
693 SV * newpath 1112 SV * newpath
694 SV * callback 1113 SV * callback
1114 ALIAS:
1115 aio_link = REQ_LINK
1116 aio_symlink = REQ_SYMLINK
1117 aio_rename = REQ_RENAME
695 CODE: 1118 PPCODE:
696{ 1119{
697 dREQ; 1120 dREQ;
698 1121
699 req->type = REQ_SYMLINK; 1122 req->type = ix;
700 req->fh = newSVsv (oldpath); 1123 req->fh = newSVsv (oldpath);
701 req->data2ptr = SvPVbyte_nolen (req->fh); 1124 req->data2ptr = SvPVbyte_nolen (req->fh);
702 req->data = newSVsv (newpath); 1125 req->data = newSVsv (newpath);
703 req->dataptr = SvPVbyte_nolen (req->data); 1126 req->dataptr = SvPVbyte_nolen (req->data);
704 1127
705 send_req (req); 1128 REQ_SEND;
706} 1129}
707 1130
708void 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
709flush() 1162flush ()
710 PROTOTYPE: 1163 PROTOTYPE:
711 CODE: 1164 CODE:
712 while (nreqs) 1165 while (nreqs)
713 { 1166 {
714 poll_wait (); 1167 poll_wait ();
… …
754 CODE: 1207 CODE:
755 RETVAL = nreqs; 1208 RETVAL = nreqs;
756 OUTPUT: 1209 OUTPUT:
757 RETVAL 1210 RETVAL
758 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 printf ("req = %p\n", req);//D
1236
1237 if (req)
1238 {
1239 req->grp_prev = grp;
1240 req->grp_next = grp->grp_next;
1241 grp->grp_next->grp_prev = req;
1242 grp->grp_next = req;
1243
1244 req->grp = grp;
1245 }
1246 }
1247}
1248

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