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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.24 by root, Wed Aug 17 03:01:56 2005 UTC vs.
Revision 1.47 by root, Sun Oct 22 10:10:23 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, 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;
91 int do_croak = 0; 282 int do_croak = 0;
92 aio_req req, prv; 283 aio_req req;
93 284
285 for (;;)
286 {
94 pthread_mutex_lock (&reslock); 287 pthread_mutex_lock (&reslock);
288 req = ress;
95 289
96 { 290 if (req)
291 {
292 ress = req->next;
293
294 if (!ress)
295 {
97 /* read any signals sent by the worker threads */ 296 /* read any signals sent by the worker threads */
98 char buf [32]; 297 char buf [32];
99 while (read (respipe [0], buf, 32) == 32) 298 while (read (respipe [0], buf, 32) == 32)
299 ;
300
301 rese = 0;
302 }
100 ; 303 }
101 }
102 304
103 req = ress;
104 ress = rese = 0;
105
106 pthread_mutex_unlock (&reslock); 305 pthread_mutex_unlock (&reslock);
107 306
108 while (req) 307 if (!req)
109 { 308 break;
309
110 nreqs--; 310 nreqs--;
111 311
112 if (req->type == REQ_QUIT) 312 if (req->type == REQ_QUIT)
113 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 }
114 else 319 else
115 { 320 {
116 int errorno = errno;
117 errno = req->errorno;
118
119 if (req->type == REQ_READ) 321 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset 322 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121 + req->result > 0 ? req->result : 0);
122 323
324 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
325 SvREADONLY_off (req->data);
326
123 if (req->data) 327 if (req->statdata)
124 SvREFCNT_dec (req->data);
125
126 if (req->fh)
127 SvREFCNT_dec (req->fh);
128
129 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
130 { 328 {
131 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 329 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
132 PL_laststatval = req->result; 330 PL_laststatval = req->result;
133 PL_statcache = *(req->statdata); 331 PL_statcache = *(req->statdata);
134
135 Safefree (req->statdata);
136 } 332 }
137 333
138 ENTER; 334 req_invoke (req);
139 PUSHMARK (SP);
140 XPUSHs (sv_2mortal (newSViv (req->result)));
141 335
142 if (req->type == REQ_OPEN)
143 {
144 /* convert fd to fh */
145 SV *fh;
146
147 PUTBACK;
148 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149 SPAGAIN;
150
151 fh = SvREFCNT_inc (POPs);
152
153 PUSHMARK (SP);
154 XPUSHs (sv_2mortal (fh));
155 }
156
157 if (SvOK (req->callback))
158 {
159 PUTBACK;
160 call_sv (req->callback, G_VOID | G_EVAL);
161 SPAGAIN;
162 }
163
164 do_croak = SvTRUE (ERRSV);
165
166 LEAVE;
167
168 if (req->callback)
169 SvREFCNT_dec (req->callback);
170
171 errno = errorno;
172 count++; 336 count++;
173 } 337 }
174 338
175 prv = req;
176 req = req->next;
177 Safefree (prv); 339 req_free (req);
178
179 if (do_croak)
180 croak (0);
181 } 340 }
182 341
183 return count; 342 return count;
184} 343}
185 344
186static void *aio_proc(void *arg); 345static void *aio_proc(void *arg);
187 346
188static void
189start_thread (void) 347static void start_thread (void)
190{ 348{
191 sigset_t fullsigset, oldsigset; 349 sigset_t fullsigset, oldsigset;
192 pthread_t tid; 350 pthread_t tid;
193 pthread_attr_t attr; 351 pthread_attr_t attr;
194 352
… …
203 started++; 361 started++;
204 362
205 sigprocmask (SIG_SETMASK, &oldsigset, 0); 363 sigprocmask (SIG_SETMASK, &oldsigset, 0);
206} 364}
207 365
208static void 366static void req_send (aio_req req)
209send_req (aio_req req)
210{ 367{
368 while (started < wanted && nreqs >= started)
369 start_thread ();
370
211 nreqs++; 371 nreqs++;
212 372
213 pthread_mutex_lock (&reqlock); 373 pthread_mutex_lock (&reqlock);
214 374
215 req->next = 0; 375 req->next = 0;
… …
223 reqe = reqs = req; 383 reqe = reqs = req;
224 384
225 pthread_cond_signal (&reqwait); 385 pthread_cond_signal (&reqwait);
226 pthread_mutex_unlock (&reqlock); 386 pthread_mutex_unlock (&reqlock);
227 387
228 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)
229 { 429 {
230 poll_wait (); 430 poll_wait ();
231 poll_cb (); 431 poll_cb ();
232 } 432 }
233} 433}
234 434
235static void 435static void create_pipe ()
236end_thread (void)
237{ 436{
238 aio_req req; 437 if (pipe (respipe))
239 New (0, req, 1, aio_cb); 438 croak ("unable to initialize result pipe");
240 req->type = REQ_QUIT;
241 439
242 send_req (req); 440 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
243} 441 croak ("cannot set result pipe to nonblocking mode");
244 442
245 443 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
246static void min_parallel (int nthreads) 444 croak ("cannot set result pipe to nonblocking mode");
247{
248 while (nthreads > started)
249 start_thread ();
250}
251
252static void max_parallel (int nthreads)
253{
254 int cur = started;
255 while (cur > nthreads)
256 {
257 end_thread ();
258 cur--;
259 }
260
261 while (started > nthreads)
262 {
263 poll_wait ();
264 poll_cb ();
265 }
266}
267
268static int fork_started;
269
270static void atfork_prepare (void)
271{
272 pthread_mutex_lock (&frklock);
273
274 fork_started = started;
275
276 for (;;) {
277 while (nreqs)
278 {
279 poll_wait ();
280 poll_cb ();
281 }
282
283 max_parallel (0);
284
285 pthread_mutex_lock (&reqlock);
286
287 if (!nreqs && !started)
288 break;
289
290 pthread_mutex_unlock (&reqlock);
291
292 min_parallel (fork_started);
293 }
294
295 pthread_mutex_lock (&reslock);
296
297 assert (!started);
298 assert (!nreqs);
299 assert (!reqs && !reqe);
300 assert (!ress && !rese);
301}
302
303static void atfork_parent (void)
304{
305 pthread_mutex_unlock (&reslock);
306 min_parallel (fork_started);
307 pthread_mutex_unlock (&reqlock);
308 pthread_mutex_unlock (&frklock);
309}
310
311static void atfork_child (void)
312{
313 reqs = reqe = 0;
314
315 atfork_parent ();
316} 445}
317 446
318/*****************************************************************************/ 447/*****************************************************************************/
319/* work around various missing functions */ 448/* work around various missing functions */
320 449
… …
325/* 454/*
326 * make our pread/pwrite safe against themselves, but not against 455 * make our pread/pwrite safe against themselves, but not against
327 * 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,
328 * but that's your problem, not mine. 457 * but that's your problem, not mine.
329 */ 458 */
330static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 459static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
331 460
332static ssize_t 461static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
333pread (int fd, void *buf, size_t count, off_t offset)
334{ 462{
335 ssize_t res; 463 ssize_t res;
336 off_t ooffset; 464 off_t ooffset;
337 465
338 pthread_mutex_lock (&iolock); 466 pthread_mutex_lock (&preadwritelock);
339 ooffset = lseek (fd, 0, SEEK_CUR); 467 ooffset = lseek (fd, 0, SEEK_CUR);
340 lseek (fd, offset, SEEK_SET); 468 lseek (fd, offset, SEEK_SET);
341 res = read (fd, buf, count); 469 res = read (fd, buf, count);
342 lseek (fd, ooffset, SEEK_SET); 470 lseek (fd, ooffset, SEEK_SET);
343 pthread_mutex_unlock (&iolock); 471 pthread_mutex_unlock (&preadwritelock);
344 472
345 return res; 473 return res;
346} 474}
347 475
348static ssize_t
349pwrite (int fd, void *buf, size_t count, off_t offset) 476static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
350{ 477{
351 ssize_t res; 478 ssize_t res;
352 off_t ooffset; 479 off_t ooffset;
353 480
354 pthread_mutex_lock (&iolock); 481 pthread_mutex_lock (&preadwritelock);
355 ooffset = lseek (fd, 0, SEEK_CUR); 482 ooffset = lseek (fd, 0, SEEK_CUR);
356 lseek (fd, offset, SEEK_SET); 483 lseek (fd, offset, SEEK_SET);
357 res = write (fd, buf, count); 484 res = write (fd, buf, count);
358 lseek (fd, offset, SEEK_SET); 485 lseek (fd, offset, SEEK_SET);
359 pthread_mutex_unlock (&iolock); 486 pthread_mutex_unlock (&preadwritelock);
360 487
361 return res; 488 return res;
362} 489}
363#endif 490#endif
364 491
… …
367#endif 494#endif
368 495
369#if !HAVE_READAHEAD 496#if !HAVE_READAHEAD
370# define readahead aio_readahead 497# define readahead aio_readahead
371 498
499static ssize_t readahead (int fd, off_t offset, size_t count)
500{
372static char readahead_buf[4096]; 501 char readahead_buf[4096];
373 502
374static ssize_t
375readahead (int fd, off_t offset, size_t count)
376{
377 while (count > 0) 503 while (count > 0)
378 { 504 {
379 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 505 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
380 506
381 pread (fd, readahead_buf, len, offset); 507 pread (fd, readahead_buf, len, offset);
… …
385 511
386 errno = 0; 512 errno = 0;
387} 513}
388#endif 514#endif
389 515
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
390/*****************************************************************************/ 701/*****************************************************************************/
391 702
392static void *
393aio_proc (void *thr_arg) 703static void *aio_proc (void *thr_arg)
394{ 704{
395 aio_req req; 705 aio_req req;
396 int type; 706 int type;
397 707
398 do 708 do
… …
417 727
418 pthread_mutex_unlock (&reqlock); 728 pthread_mutex_unlock (&reqlock);
419 729
420 errno = 0; /* strictly unnecessary */ 730 errno = 0; /* strictly unnecessary */
421 731
422 type = req->type; 732 if (!req->cancelled)
423
424 switch (type) 733 switch (req->type)
425 { 734 {
426 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;
427 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;
428 737
429 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;
430 740
431 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 741 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
432 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 742 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
433 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 743 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
434 744
435 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;
436 case REQ_CLOSE: req->result = close (req->fd); break; 746 case REQ_CLOSE: req->result = close (req->fd); break;
437 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 747 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
438 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;
439 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 751 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
440 752
441 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 753 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
442 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;
443 756
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
444 case REQ_QUIT: 767 case REQ_QUIT:
445 break; 768 break;
446 769
447 default: 770 default:
448 req->result = ENOSYS; 771 req->result = ENOSYS;
449 break; 772 break;
450 } 773 }
451 774
452 req->errorno = errno; 775 req->errorno = errno;
453 776
454 pthread_mutex_lock (&reslock); 777 pthread_mutex_lock (&reslock);
455 778
… …
473 while (type != REQ_QUIT); 796 while (type != REQ_QUIT);
474 797
475 return 0; 798 return 0;
476} 799}
477 800
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
478#define dREQ \ 858#define dREQ \
479 aio_req req; \ 859 aio_req req; \
480 \ 860 \
481 if (SvOK (callback) && !SvROK (callback)) \ 861 if (SvOK (callback) && !SvROK (callback)) \
482 croak ("clalback must be undef or of reference type"); \ 862 croak ("callback must be undef or of reference type"); \
483 \ 863 \
484 Newz (0, req, 1, aio_cb); \ 864 Newz (0, req, 1, aio_cb); \
485 if (!req) \ 865 if (!req) \
486 croak ("out of memory during aio_req allocation"); \ 866 croak ("out of memory during aio_req allocation"); \
487 \ 867 \
488 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));
489 875
490MODULE = IO::AIO PACKAGE = IO::AIO 876MODULE = IO::AIO PACKAGE = IO::AIO
491 877
492PROTOTYPES: ENABLE 878PROTOTYPES: ENABLE
493 879
494BOOT: 880BOOT:
495{ 881{
496 if (pipe (respipe)) 882 HV *stash = gv_stashpv ("IO::AIO", 1);
497 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));
498 886
499 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 887 create_pipe ();
500 croak ("cannot set result pipe to nonblocking mode");
501
502 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
503 croak ("cannot set result pipe to nonblocking mode");
504
505 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 888 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
506} 889}
507 890
508void 891void
509min_parallel(nthreads) 892min_parallel (nthreads)
510 int nthreads 893 int nthreads
511 PROTOTYPE: $ 894 PROTOTYPE: $
512 895
513void 896void
514max_parallel(nthreads) 897max_parallel (nthreads)
515 int nthreads 898 int nthreads
516 PROTOTYPE: $ 899 PROTOTYPE: $
517 900
518int 901int
519max_outstanding(nreqs) 902max_outstanding (nreqs)
520 int nreqs 903 int nreqs
521 PROTOTYPE: $ 904 PROTOTYPE: $
522 CODE: 905 CODE:
523 RETVAL = max_outstanding; 906 RETVAL = max_outstanding;
524 max_outstanding = nreqs; 907 max_outstanding = nreqs;
525 908
526void 909void
527aio_open(pathname,flags,mode,callback=&PL_sv_undef) 910aio_open (pathname,flags,mode,callback=&PL_sv_undef)
528 SV * pathname 911 SV * pathname
529 int flags 912 int flags
530 int mode 913 int mode
531 SV * callback 914 SV * callback
532 PROTOTYPE: $$$;$ 915 PROTOTYPE: $$$;$
533 CODE: 916 PPCODE:
534{ 917{
535 dREQ; 918 dREQ;
536 919
537 req->type = REQ_OPEN; 920 req->type = REQ_OPEN;
538 req->data = newSVsv (pathname); 921 req->data = newSVsv (pathname);
539 req->dataptr = SvPVbyte_nolen (req->data); 922 req->dataptr = SvPVbyte_nolen (req->data);
540 req->fd = flags; 923 req->fd = flags;
541 req->mode = mode; 924 req->mode = mode;
542 925
543 send_req (req); 926 REQ_SEND;
544} 927}
545 928
546void 929void
547aio_close(fh,callback=&PL_sv_undef) 930aio_close (fh,callback=&PL_sv_undef)
548 SV * fh 931 SV * fh
549 SV * callback 932 SV * callback
550 PROTOTYPE: $;$ 933 PROTOTYPE: $;$
551 ALIAS: 934 ALIAS:
552 aio_close = REQ_CLOSE 935 aio_close = REQ_CLOSE
553 aio_fsync = REQ_FSYNC 936 aio_fsync = REQ_FSYNC
554 aio_fdatasync = REQ_FDATASYNC 937 aio_fdatasync = REQ_FDATASYNC
555 CODE: 938 PPCODE:
556{ 939{
557 dREQ; 940 dREQ;
558 941
559 req->type = ix; 942 req->type = ix;
560 req->fh = newSVsv (fh); 943 req->fh = newSVsv (fh);
561 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 944 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
562 945
563 send_req (req); 946 REQ_SEND (req);
564} 947}
565 948
566void 949void
567aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 950aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
568 SV * fh 951 SV * fh
569 UV offset 952 UV offset
570 IV length 953 UV length
571 SV * data 954 SV * data
572 IV dataoffset 955 UV dataoffset
573 SV * callback 956 SV * callback
574 ALIAS: 957 ALIAS:
575 aio_read = REQ_READ 958 aio_read = REQ_READ
576 aio_write = REQ_WRITE 959 aio_write = REQ_WRITE
577 PROTOTYPE: $$$$$;$ 960 PROTOTYPE: $$$$$;$
578 CODE: 961 PPCODE:
579{ 962{
580 aio_req req; 963 aio_req req;
581 STRLEN svlen; 964 STRLEN svlen;
582 char *svptr = SvPVbyte (data, svlen); 965 char *svptr = SvPVbyte (data, svlen);
583 966
… …
614 : IoOFP (sv_2io (fh))); 997 : IoOFP (sv_2io (fh)));
615 req->offset = offset; 998 req->offset = offset;
616 req->length = length; 999 req->length = length;
617 req->data = SvREFCNT_inc (data); 1000 req->data = SvREFCNT_inc (data);
618 req->dataptr = (char *)svptr + dataoffset; 1001 req->dataptr = (char *)svptr + dataoffset;
619 req->callback = SvREFCNT_inc (callback);
620 1002
621 send_req (req); 1003 if (!SvREADONLY (data))
1004 {
1005 SvREADONLY_on (data);
1006 req->data2ptr = (void *)data;
1007 }
1008
1009 REQ_SEND;
622 } 1010 }
623} 1011}
624 1012
625void 1013void
1014aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1015 SV * out_fh
1016 SV * in_fh
1017 UV in_offset
1018 UV length
1019 SV * callback
1020 PROTOTYPE: $$$$;$
1021 PPCODE:
1022{
1023 dREQ;
1024
1025 req->type = REQ_SENDFILE;
1026 req->fh = newSVsv (out_fh);
1027 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1028 req->fh2 = newSVsv (in_fh);
1029 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1030 req->offset = in_offset;
1031 req->length = length;
1032
1033 REQ_SEND;
1034}
1035
1036void
626aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1037aio_readahead (fh,offset,length,callback=&PL_sv_undef)
627 SV * fh 1038 SV * fh
628 UV offset 1039 UV offset
629 IV length 1040 IV length
630 SV * callback 1041 SV * callback
631 PROTOTYPE: $$$;$ 1042 PROTOTYPE: $$$;$
632 CODE: 1043 PPCODE:
633{ 1044{
634 dREQ; 1045 dREQ;
635 1046
636 req->type = REQ_READAHEAD; 1047 req->type = REQ_READAHEAD;
637 req->fh = newSVsv (fh); 1048 req->fh = newSVsv (fh);
638 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1049 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
639 req->offset = offset; 1050 req->offset = offset;
640 req->length = length; 1051 req->length = length;
641 1052
642 send_req (req); 1053 REQ_SEND;
643} 1054}
644 1055
645void 1056void
646aio_stat(fh_or_path,callback=&PL_sv_undef) 1057aio_stat (fh_or_path,callback=&PL_sv_undef)
647 SV * fh_or_path 1058 SV * fh_or_path
648 SV * callback 1059 SV * callback
649 ALIAS: 1060 ALIAS:
650 aio_stat = REQ_STAT 1061 aio_stat = REQ_STAT
651 aio_lstat = REQ_LSTAT 1062 aio_lstat = REQ_LSTAT
652 CODE: 1063 PPCODE:
653{ 1064{
654 dREQ; 1065 dREQ;
655 1066
656 New (0, req->statdata, 1, Stat_t); 1067 New (0, req->statdata, 1, Stat_t);
657 if (!req->statdata) 1068 if (!req->statdata)
1069 {
1070 req_free (req);
658 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 }
659 1073
660 if (SvPOK (fh_or_path)) 1074 if (SvPOK (fh_or_path))
661 { 1075 {
662 req->type = ix; 1076 req->type = ix;
663 req->data = newSVsv (fh_or_path); 1077 req->data = newSVsv (fh_or_path);
… …
668 req->type = REQ_FSTAT; 1082 req->type = REQ_FSTAT;
669 req->fh = newSVsv (fh_or_path); 1083 req->fh = newSVsv (fh_or_path);
670 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1084 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
671 } 1085 }
672 1086
673 send_req (req); 1087 REQ_SEND;
674} 1088}
675 1089
676void 1090void
677aio_unlink(pathname,callback=&PL_sv_undef) 1091aio_unlink (pathname,callback=&PL_sv_undef)
678 SV * pathname 1092 SV * pathname
679 SV * callback 1093 SV * callback
680 ALIAS: 1094 ALIAS:
681 aio_unlink = REQ_UNLINK 1095 aio_unlink = REQ_UNLINK
682 aio_rmdir = REQ_RMDIR 1096 aio_rmdir = REQ_RMDIR
1097 aio_readdir = REQ_READDIR
683 CODE: 1098 PPCODE:
684{ 1099{
685 dREQ; 1100 dREQ;
686 1101
687 req->type = ix; 1102 req->type = ix;
688 req->data = newSVsv (pathname); 1103 req->data = newSVsv (pathname);
689 req->dataptr = SvPVbyte_nolen (req->data); 1104 req->dataptr = SvPVbyte_nolen (req->data);
690 1105
691 send_req (req); 1106 REQ_SEND;
692} 1107}
693 1108
694void 1109void
695aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1110aio_link (oldpath,newpath,callback=&PL_sv_undef)
696 SV * oldpath 1111 SV * oldpath
697 SV * newpath 1112 SV * newpath
698 SV * callback 1113 SV * callback
1114 ALIAS:
1115 aio_link = REQ_LINK
1116 aio_symlink = REQ_SYMLINK
1117 aio_rename = REQ_RENAME
699 CODE: 1118 PPCODE:
700{ 1119{
701 dREQ; 1120 dREQ;
702 1121
703 req->type = REQ_SYMLINK; 1122 req->type = ix;
704 req->fh = newSVsv (oldpath); 1123 req->fh = newSVsv (oldpath);
705 req->data2ptr = SvPVbyte_nolen (req->fh); 1124 req->data2ptr = SvPVbyte_nolen (req->fh);
706 req->data = newSVsv (newpath); 1125 req->data = newSVsv (newpath);
707 req->dataptr = SvPVbyte_nolen (req->data); 1126 req->dataptr = SvPVbyte_nolen (req->data);
708 1127
709 send_req (req); 1128 REQ_SEND;
710} 1129}
711 1130
712void 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
713flush() 1162flush ()
714 PROTOTYPE: 1163 PROTOTYPE:
715 CODE: 1164 CODE:
716 while (nreqs) 1165 while (nreqs)
717 { 1166 {
718 poll_wait (); 1167 poll_wait ();
… …
758 CODE: 1207 CODE:
759 RETVAL = nreqs; 1208 RETVAL = nreqs;
760 OUTPUT: 1209 OUTPUT:
761 RETVAL 1210 RETVAL
762 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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