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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.26 by root, Wed Aug 17 03:52:20 2005 UTC vs.
Revision 1.45 by root, Sun Oct 22 00:19:05 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;
93typedef aio_cb *aio_group;
59 94
60static int started; 95static int started, wanted;
61static volatile int nreqs; 96static volatile int nreqs;
62static int max_outstanding = 1<<30; 97static int max_outstanding = 1<<30;
63static int respipe [2]; 98static int respipe [2];
64 99
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 100static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 101static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 102static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69 103
70static volatile aio_req reqs, reqe; /* queue start, queue end */ 104static volatile aio_req reqs, reqe; /* queue start, queue end */
71static volatile aio_req ress, rese; /* queue start, queue end */ 105static volatile aio_req ress, rese; /* queue start, queue end */
72 106
73static void free_req (aio_req req) 107static void req_free (aio_req req);
74{
75 if (req->data)
76 SvREFCNT_dec (req->data);
77 108
78 if (req->fh) 109/* must be called at most once */
79 SvREFCNT_dec (req->fh); 110static SV *req_sv (aio_req req, const char *klass)
111{
112 req->self = (SV *)newHV ();
113 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80 114
81 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) 115 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
82 Safefree (req->statdata);
83
84 if (req->callback)
85 SvREFCNT_dec (req->callback);
86
87 Safefree (req);
88} 116}
89 117
90static void 118static aio_req SvAIO_REQ (SV *sv)
91poll_wait () 119{
120 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
121 croak ("object of class " AIO_REQ_KLASS " expected");
122
123 MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
124
125 return mg ? (aio_req)mg->mg_ptr : 0;
126}
127
128static void poll_wait ()
92{ 129{
93 if (nreqs && !ress) 130 if (nreqs && !ress)
94 { 131 {
95 fd_set rfd; 132 fd_set rfd;
96 FD_ZERO(&rfd); 133 FD_ZERO(&rfd);
… …
98 135
99 select (respipe [0] + 1, &rfd, 0, 0, 0); 136 select (respipe [0] + 1, &rfd, 0, 0, 0);
100 } 137 }
101} 138}
102 139
103static int 140static void req_invoke (aio_req req)
104poll_cb () 141{
142 dSP;
143 int errorno = errno;
144
145 if (req->cancelled || !SvOK (req->callback))
146 return;
147
148 errno = req->errorno;
149
150 ENTER;
151 PUSHMARK (SP);
152
153 switch (req->type)
154 {
155 case REQ_READDIR:
156 {
157 SV *rv = &PL_sv_undef;
158
159 if (req->result >= 0)
160 {
161 char *buf = req->data2ptr;
162 AV *av = newAV ();
163
164 while (req->result)
165 {
166 SV *sv = newSVpv (buf, 0);
167
168 av_push (av, sv);
169 buf += SvCUR (sv) + 1;
170 req->result--;
171 }
172
173 rv = sv_2mortal (newRV_noinc ((SV *)av));
174 }
175
176 XPUSHs (rv);
177 }
178 break;
179
180 case REQ_OPEN:
181 {
182 /* convert fd to fh */
183 SV *fh;
184
185 XPUSHs (sv_2mortal (newSViv (req->result)));
186 PUTBACK;
187 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
188 SPAGAIN;
189
190 fh = SvREFCNT_inc (POPs);
191
192 PUSHMARK (SP);
193 XPUSHs (sv_2mortal (fh));
194 }
195 break;
196
197 case REQ_SLEEP:
198 case REQ_GROUP:
199 break;
200
201 default:
202 XPUSHs (sv_2mortal (newSViv (req->result)));
203 break;
204 }
205
206
207 PUTBACK;
208 call_sv (req->callback, G_VOID | G_EVAL);
209 SPAGAIN;
210
211 if (SvTRUE (ERRSV))
212 {
213 req_free (req);
214 croak (0);
215 }
216
217 LEAVE;
218
219 errno = errorno;
220}
221
222static void req_free (aio_req req)
223{
224 if (req->grp)
225 {
226 aio_req grp = req->grp;
227
228 /* unlink request */
229 req->grp_next->grp_prev = req->grp_prev;
230 req->grp_prev->grp_next = req->grp_next;
231
232 if (grp->grp_next == grp)
233 {
234 req_invoke (grp);
235 req_free (grp);
236 }
237 }
238
239 if (req->self)
240 {
241 sv_unmagic (req->self, PERL_MAGIC_ext);
242 SvREFCNT_dec (req->self);
243 }
244
245 if (req->data)
246 SvREFCNT_dec (req->data);
247
248 if (req->fh)
249 SvREFCNT_dec (req->fh);
250
251 if (req->fh2)
252 SvREFCNT_dec (req->fh2);
253
254 if (req->statdata)
255 Safefree (req->statdata);
256
257 if (req->callback)
258 SvREFCNT_dec (req->callback);
259
260 if (req->type == REQ_READDIR && req->result >= 0)
261 free (req->data2ptr);
262
263 Safefree (req);
264}
265
266static void req_cancel (aio_req req)
267{
268 req->cancelled = 1;
269
270 if (req->type == REQ_GROUP)
271 {
272 aio_req sub;
273
274 for (sub = req->grp_next; sub != req; sub = sub->grp_next)
275 req_cancel (sub);
276 }
277}
278
279static int poll_cb ()
105{ 280{
106 dSP; 281 dSP;
107 int count = 0; 282 int count = 0;
108 int do_croak = 0; 283 int do_croak = 0;
109 aio_req req, prv; 284 aio_req req;
110 285
286 for (;;)
287 {
111 pthread_mutex_lock (&reslock); 288 pthread_mutex_lock (&reslock);
289 req = ress;
112 290
113 { 291 if (req)
292 {
293 ress = req->next;
294
295 if (!ress)
296 {
114 /* read any signals sent by the worker threads */ 297 /* read any signals sent by the worker threads */
115 char buf [32]; 298 char buf [32];
116 while (read (respipe [0], buf, 32) == 32) 299 while (read (respipe [0], buf, 32) == 32)
300 ;
301
302 rese = 0;
303 }
117 ; 304 }
118 }
119 305
120 req = ress;
121 ress = rese = 0;
122
123 pthread_mutex_unlock (&reslock); 306 pthread_mutex_unlock (&reslock);
124 307
125 while (req) 308 if (!req)
126 { 309 break;
310
127 nreqs--; 311 nreqs--;
128 312
129 if (req->type == REQ_QUIT) 313 if (req->type == REQ_QUIT)
130 started--; 314 started--;
315 else if (req->type == REQ_GROUP && req->grp_next != req)
316 continue;
131 else 317 else
132 { 318 {
133 int errorno = errno;
134 errno = req->errorno;
135
136 if (req->type == REQ_READ) 319 if (req->type == REQ_READ)
137 SvCUR_set (req->data, req->dataoffset 320 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
138 + req->result > 0 ? req->result : 0);
139 321
140 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) 322 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
323 SvREADONLY_off (req->data);
324
325 if (req->statdata)
141 { 326 {
142 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 327 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
143 PL_laststatval = req->result; 328 PL_laststatval = req->result;
144 PL_statcache = *(req->statdata); 329 PL_statcache = *(req->statdata);
145 } 330 }
146 331
147 ENTER; 332 req_invoke (req);
148 PUSHMARK (SP);
149 XPUSHs (sv_2mortal (newSViv (req->result)));
150 333
151 if (req->type == REQ_OPEN)
152 {
153 /* convert fd to fh */
154 SV *fh;
155
156 PUTBACK;
157 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
158 SPAGAIN;
159
160 fh = SvREFCNT_inc (POPs);
161
162 PUSHMARK (SP);
163 XPUSHs (sv_2mortal (fh));
164 }
165
166 if (SvOK (req->callback))
167 {
168 PUTBACK;
169 call_sv (req->callback, G_VOID | G_EVAL);
170 SPAGAIN;
171 }
172
173 LEAVE;
174
175 do_croak = SvTRUE (ERRSV);
176
177 errno = errorno;
178 count++; 334 count++;
179 } 335 }
180 336
181 prv = req; 337 req_free (req);
182 req = req->next;
183 free_req (prv);
184
185 if (do_croak)
186 croak (0);
187 } 338 }
188 339
189 return count; 340 return count;
190} 341}
191 342
192static void *aio_proc(void *arg); 343static void *aio_proc(void *arg);
193 344
194static void
195start_thread (void) 345static void start_thread (void)
196{ 346{
197 sigset_t fullsigset, oldsigset; 347 sigset_t fullsigset, oldsigset;
198 pthread_t tid; 348 pthread_t tid;
199 pthread_attr_t attr; 349 pthread_attr_t attr;
200 350
… …
209 started++; 359 started++;
210 360
211 sigprocmask (SIG_SETMASK, &oldsigset, 0); 361 sigprocmask (SIG_SETMASK, &oldsigset, 0);
212} 362}
213 363
214static void 364static void req_send (aio_req req)
215send_req (aio_req req)
216{ 365{
366 while (started < wanted && nreqs >= started)
367 start_thread ();
368
217 nreqs++; 369 nreqs++;
218 370
219 pthread_mutex_lock (&reqlock); 371 pthread_mutex_lock (&reqlock);
220 372
221 req->next = 0; 373 req->next = 0;
… …
229 reqe = reqs = req; 381 reqe = reqs = req;
230 382
231 pthread_cond_signal (&reqwait); 383 pthread_cond_signal (&reqwait);
232 pthread_mutex_unlock (&reqlock); 384 pthread_mutex_unlock (&reqlock);
233 385
234 while (nreqs > max_outstanding) 386 if (nreqs > max_outstanding)
387 for (;;)
235 { 388 {
389 poll_cb ();
390
391 if (nreqs <= max_outstanding)
392 break;
393
236 poll_wait (); 394 poll_wait ();
237 poll_cb ();
238 } 395 }
239} 396}
240 397
241static void 398static void end_thread (void)
242end_thread (void)
243{ 399{
244 aio_req req; 400 aio_req req;
245 Newz (0, req, 1, aio_cb); 401 Newz (0, req, 1, aio_cb);
246 req->type = REQ_QUIT; 402 req->type = REQ_QUIT;
247 403
248 send_req (req); 404 req_send (req);
249} 405}
250
251 406
252static void min_parallel (int nthreads) 407static void min_parallel (int nthreads)
253{ 408{
254 while (nthreads > started) 409 if (wanted < nthreads)
255 start_thread (); 410 wanted = nthreads;
256} 411}
257 412
258static void max_parallel (int nthreads) 413static void max_parallel (int nthreads)
259{ 414{
260 int cur = started; 415 int cur = started;
416
417 if (wanted > nthreads)
418 wanted = nthreads;
419
261 while (cur > nthreads) 420 while (cur > wanted)
262 { 421 {
263 end_thread (); 422 end_thread ();
264 cur--; 423 cur--;
265 } 424 }
266 425
267 while (started > nthreads) 426 while (started > wanted)
268 { 427 {
269 poll_wait (); 428 poll_wait ();
270 poll_cb (); 429 poll_cb ();
271 } 430 }
272} 431}
… …
279 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 438 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
280 croak ("cannot set result pipe to nonblocking mode"); 439 croak ("cannot set result pipe to nonblocking mode");
281 440
282 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 441 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
283 croak ("cannot set result pipe to nonblocking mode"); 442 croak ("cannot set result pipe to nonblocking mode");
284}
285
286static void atfork_prepare (void)
287{
288 pthread_mutex_lock (&frklock);
289 pthread_mutex_lock (&reqlock);
290 pthread_mutex_lock (&reslock);
291}
292
293static void atfork_parent (void)
294{
295 pthread_mutex_unlock (&reslock);
296 pthread_mutex_unlock (&reqlock);
297 pthread_mutex_unlock (&frklock);
298}
299
300static void atfork_child (void)
301{
302 int restart = started;
303 started = 0;
304
305 while (reqs)
306 {
307 free_req (reqs);
308 reqs = reqs->next;
309 }
310
311 reqs = reqe = 0;
312
313 while (ress)
314 {
315 free_req (ress);
316 ress = ress->next;
317 }
318
319 ress = rese = 0;
320
321 close (respipe [0]);
322 close (respipe [1]);
323
324 create_pipe ();
325
326 atfork_parent ();
327
328 min_parallel (restart);
329} 443}
330 444
331/*****************************************************************************/ 445/*****************************************************************************/
332/* work around various missing functions */ 446/* work around various missing functions */
333 447
… …
338/* 452/*
339 * make our pread/pwrite safe against themselves, but not against 453 * make our pread/pwrite safe against themselves, but not against
340 * normal read/write by using a mutex. slows down execution a lot, 454 * normal read/write by using a mutex. slows down execution a lot,
341 * but that's your problem, not mine. 455 * but that's your problem, not mine.
342 */ 456 */
343static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 457static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
344 458
345static ssize_t 459static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
346pread (int fd, void *buf, size_t count, off_t offset)
347{ 460{
348 ssize_t res; 461 ssize_t res;
349 off_t ooffset; 462 off_t ooffset;
350 463
351 pthread_mutex_lock (&iolock); 464 pthread_mutex_lock (&preadwritelock);
352 ooffset = lseek (fd, 0, SEEK_CUR); 465 ooffset = lseek (fd, 0, SEEK_CUR);
353 lseek (fd, offset, SEEK_SET); 466 lseek (fd, offset, SEEK_SET);
354 res = read (fd, buf, count); 467 res = read (fd, buf, count);
355 lseek (fd, ooffset, SEEK_SET); 468 lseek (fd, ooffset, SEEK_SET);
356 pthread_mutex_unlock (&iolock); 469 pthread_mutex_unlock (&preadwritelock);
357 470
358 return res; 471 return res;
359} 472}
360 473
361static ssize_t
362pwrite (int fd, void *buf, size_t count, off_t offset) 474static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
363{ 475{
364 ssize_t res; 476 ssize_t res;
365 off_t ooffset; 477 off_t ooffset;
366 478
367 pthread_mutex_lock (&iolock); 479 pthread_mutex_lock (&preadwritelock);
368 ooffset = lseek (fd, 0, SEEK_CUR); 480 ooffset = lseek (fd, 0, SEEK_CUR);
369 lseek (fd, offset, SEEK_SET); 481 lseek (fd, offset, SEEK_SET);
370 res = write (fd, buf, count); 482 res = write (fd, buf, count);
371 lseek (fd, offset, SEEK_SET); 483 lseek (fd, offset, SEEK_SET);
372 pthread_mutex_unlock (&iolock); 484 pthread_mutex_unlock (&preadwritelock);
373 485
374 return res; 486 return res;
375} 487}
376#endif 488#endif
377 489
… …
380#endif 492#endif
381 493
382#if !HAVE_READAHEAD 494#if !HAVE_READAHEAD
383# define readahead aio_readahead 495# define readahead aio_readahead
384 496
497static ssize_t readahead (int fd, off_t offset, size_t count)
498{
385static char readahead_buf[4096]; 499 char readahead_buf[4096];
386 500
387static ssize_t
388readahead (int fd, off_t offset, size_t count)
389{
390 while (count > 0) 501 while (count > 0)
391 { 502 {
392 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 503 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
393 504
394 pread (fd, readahead_buf, len, offset); 505 pread (fd, readahead_buf, len, offset);
… …
398 509
399 errno = 0; 510 errno = 0;
400} 511}
401#endif 512#endif
402 513
514#if !HAVE_READDIR_R
515# define readdir_r aio_readdir_r
516
517static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
518
519static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
520{
521 struct dirent *e;
522 int errorno;
523
524 pthread_mutex_lock (&readdirlock);
525
526 e = readdir (dirp);
527 errorno = errno;
528
529 if (e)
530 {
531 *res = ent;
532 strcpy (ent->d_name, e->d_name);
533 }
534 else
535 *res = 0;
536
537 pthread_mutex_unlock (&readdirlock);
538
539 errno = errorno;
540 return e ? 0 : -1;
541}
542#endif
543
544/* sendfile always needs emulation */
545static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
546{
547 ssize_t res;
548
549 if (!count)
550 return 0;
551
552#if HAVE_SENDFILE
553# if __linux
554 res = sendfile (ofd, ifd, &offset, count);
555
556# elif __freebsd
557 /*
558 * Of course, the freebsd sendfile is a dire hack with no thoughts
559 * wasted on making it similar to other I/O functions.
560 */
561 {
562 off_t sbytes;
563 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
564
565 if (res < 0 && sbytes)
566 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
567 res = sbytes;
568 }
569
570# elif __hpux
571 res = sendfile (ofd, ifd, offset, count, 0, 0);
572
573# elif __solaris
574 {
575 struct sendfilevec vec;
576 size_t sbytes;
577
578 vec.sfv_fd = ifd;
579 vec.sfv_flag = 0;
580 vec.sfv_off = offset;
581 vec.sfv_len = count;
582
583 res = sendfilev (ofd, &vec, 1, &sbytes);
584
585 if (res < 0 && sbytes)
586 res = sbytes;
587 }
588
589# endif
590#else
591 res = -1;
592 errno = ENOSYS;
593#endif
594
595 if (res < 0
596 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
597#if __solaris
598 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
599#endif
600 )
601 )
602 {
603 /* emulate sendfile. this is a major pain in the ass */
604 char buf[4096];
605 res = 0;
606
607 while (count)
608 {
609 ssize_t cnt;
610
611 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
612
613 if (cnt <= 0)
614 {
615 if (cnt && !res) res = -1;
616 break;
617 }
618
619 cnt = write (ofd, buf, cnt);
620
621 if (cnt <= 0)
622 {
623 if (cnt && !res) res = -1;
624 break;
625 }
626
627 offset += cnt;
628 res += cnt;
629 count -= cnt;
630 }
631 }
632
633 return res;
634}
635
636/* read a full directory */
637static int scandir_ (const char *path, void **namesp)
638{
639 DIR *dirp = opendir (path);
640 union
641 {
642 struct dirent d;
643 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
644 } u;
645 struct dirent *entp;
646 char *name, *names;
647 int memlen = 4096;
648 int memofs = 0;
649 int res = 0;
650 int errorno;
651
652 if (!dirp)
653 return -1;
654
655 names = malloc (memlen);
656
657 for (;;)
658 {
659 errno = 0, readdir_r (dirp, &u.d, &entp);
660
661 if (!entp)
662 break;
663
664 name = entp->d_name;
665
666 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
667 {
668 int len = strlen (name) + 1;
669
670 res++;
671
672 while (memofs + len > memlen)
673 {
674 memlen *= 2;
675 names = realloc (names, memlen);
676 if (!names)
677 break;
678 }
679
680 memcpy (names + memofs, name, len);
681 memofs += len;
682 }
683 }
684
685 errorno = errno;
686 closedir (dirp);
687
688 if (errorno)
689 {
690 free (names);
691 errno = errorno;
692 res = -1;
693 }
694
695 *namesp = (void *)names;
696 return res;
697}
698
403/*****************************************************************************/ 699/*****************************************************************************/
404 700
405static void *
406aio_proc (void *thr_arg) 701static void *aio_proc (void *thr_arg)
407{ 702{
408 aio_req req; 703 aio_req req;
409 int type; 704 int type;
410 705
411 do 706 do
… …
430 725
431 pthread_mutex_unlock (&reqlock); 726 pthread_mutex_unlock (&reqlock);
432 727
433 errno = 0; /* strictly unnecessary */ 728 errno = 0; /* strictly unnecessary */
434 729
435 type = req->type; 730 if (!req->cancelled)
436
437 switch (type) 731 switch (req->type)
438 { 732 {
439 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 733 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
440 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 734 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
441 735
442 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 736 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
737 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
443 738
444 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 739 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
445 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 740 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
446 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 741 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
447 742
448 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 743 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
449 case REQ_CLOSE: req->result = close (req->fd); break; 744 case REQ_CLOSE: req->result = close (req->fd); break;
450 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 745 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
451 case REQ_RMDIR: req->result = rmdir (req->dataptr); break; 746 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
747 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
748 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
452 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 749 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
453 750
454 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 751 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
455 case REQ_FSYNC: req->result = fsync (req->fd); break; 752 case REQ_FSYNC: req->result = fsync (req->fd); break;
753 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
456 754
755 case REQ_SLEEP:
756 {
757 struct timeval tv;
758
759 tv.tv_sec = req->fd;
760 tv.tv_usec = req->fd2;
761
762 req->result = select (0, 0, 0, 0, &tv);
763 }
764
457 case REQ_QUIT: 765 case REQ_QUIT:
458 break; 766 break;
459 767
460 default: 768 default:
461 req->result = ENOSYS; 769 req->result = ENOSYS;
462 break; 770 break;
463 } 771 }
464 772
465 req->errorno = errno; 773 req->errorno = errno;
466 774
467 pthread_mutex_lock (&reslock); 775 pthread_mutex_lock (&reslock);
468 776
… …
486 while (type != REQ_QUIT); 794 while (type != REQ_QUIT);
487 795
488 return 0; 796 return 0;
489} 797}
490 798
799/*****************************************************************************/
800
801static void atfork_prepare (void)
802{
803 pthread_mutex_lock (&reqlock);
804 pthread_mutex_lock (&reslock);
805#if !HAVE_PREADWRITE
806 pthread_mutex_lock (&preadwritelock);
807#endif
808#if !HAVE_READDIR_R
809 pthread_mutex_lock (&readdirlock);
810#endif
811}
812
813static void atfork_parent (void)
814{
815#if !HAVE_READDIR_R
816 pthread_mutex_unlock (&readdirlock);
817#endif
818#if !HAVE_PREADWRITE
819 pthread_mutex_unlock (&preadwritelock);
820#endif
821 pthread_mutex_unlock (&reslock);
822 pthread_mutex_unlock (&reqlock);
823}
824
825static void atfork_child (void)
826{
827 aio_req prv;
828
829 started = 0;
830
831 while (reqs)
832 {
833 prv = reqs;
834 reqs = prv->next;
835 req_free (prv);
836 }
837
838 reqs = reqe = 0;
839
840 while (ress)
841 {
842 prv = ress;
843 ress = prv->next;
844 req_free (prv);
845 }
846
847 ress = rese = 0;
848
849 close (respipe [0]);
850 close (respipe [1]);
851 create_pipe ();
852
853 atfork_parent ();
854}
855
491#define dREQ \ 856#define dREQ \
492 aio_req req; \ 857 aio_req req; \
493 \ 858 \
494 if (SvOK (callback) && !SvROK (callback)) \ 859 if (SvOK (callback) && !SvROK (callback)) \
495 croak ("clalback must be undef or of reference type"); \ 860 croak ("callback must be undef or of reference type"); \
496 \ 861 \
497 Newz (0, req, 1, aio_cb); \ 862 Newz (0, req, 1, aio_cb); \
498 if (!req) \ 863 if (!req) \
499 croak ("out of memory during aio_req allocation"); \ 864 croak ("out of memory during aio_req allocation"); \
500 \ 865 \
501 req->callback = SvREFCNT_inc (callback); 866 req->callback = newSVsv (callback)
867
868#define REQ_SEND \
869 req_send (req); \
870 \
871 if (GIMME_V != G_VOID) \
872 XPUSHs (req_sv (req, AIO_REQ_KLASS));
502 873
503MODULE = IO::AIO PACKAGE = IO::AIO 874MODULE = IO::AIO PACKAGE = IO::AIO
504 875
505PROTOTYPES: ENABLE 876PROTOTYPES: ENABLE
506 877
507BOOT: 878BOOT:
508{ 879{
880 HV *stash = gv_stashpv ("IO::AIO", 1);
881 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
882 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
883 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
884
509 create_pipe (); 885 create_pipe ();
510 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 886 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
511} 887}
512 888
513void 889void
514min_parallel(nthreads) 890min_parallel (nthreads)
515 int nthreads 891 int nthreads
516 PROTOTYPE: $ 892 PROTOTYPE: $
517 893
518void 894void
519max_parallel(nthreads) 895max_parallel (nthreads)
520 int nthreads 896 int nthreads
521 PROTOTYPE: $ 897 PROTOTYPE: $
522 898
523int 899int
524max_outstanding(nreqs) 900max_outstanding (nreqs)
525 int nreqs 901 int nreqs
526 PROTOTYPE: $ 902 PROTOTYPE: $
527 CODE: 903 CODE:
528 RETVAL = max_outstanding; 904 RETVAL = max_outstanding;
529 max_outstanding = nreqs; 905 max_outstanding = nreqs;
530 906
531void 907void
532aio_open(pathname,flags,mode,callback=&PL_sv_undef) 908aio_open (pathname,flags,mode,callback=&PL_sv_undef)
533 SV * pathname 909 SV * pathname
534 int flags 910 int flags
535 int mode 911 int mode
536 SV * callback 912 SV * callback
537 PROTOTYPE: $$$;$ 913 PROTOTYPE: $$$;$
538 CODE: 914 PPCODE:
539{ 915{
540 dREQ; 916 dREQ;
541 917
542 req->type = REQ_OPEN; 918 req->type = REQ_OPEN;
543 req->data = newSVsv (pathname); 919 req->data = newSVsv (pathname);
544 req->dataptr = SvPVbyte_nolen (req->data); 920 req->dataptr = SvPVbyte_nolen (req->data);
545 req->fd = flags; 921 req->fd = flags;
546 req->mode = mode; 922 req->mode = mode;
547 923
548 send_req (req); 924 REQ_SEND;
549} 925}
550 926
551void 927void
552aio_close(fh,callback=&PL_sv_undef) 928aio_close (fh,callback=&PL_sv_undef)
553 SV * fh 929 SV * fh
554 SV * callback 930 SV * callback
555 PROTOTYPE: $;$ 931 PROTOTYPE: $;$
556 ALIAS: 932 ALIAS:
557 aio_close = REQ_CLOSE 933 aio_close = REQ_CLOSE
558 aio_fsync = REQ_FSYNC 934 aio_fsync = REQ_FSYNC
559 aio_fdatasync = REQ_FDATASYNC 935 aio_fdatasync = REQ_FDATASYNC
560 CODE: 936 PPCODE:
561{ 937{
562 dREQ; 938 dREQ;
563 939
564 req->type = ix; 940 req->type = ix;
565 req->fh = newSVsv (fh); 941 req->fh = newSVsv (fh);
566 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 942 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
567 943
568 send_req (req); 944 REQ_SEND (req);
569} 945}
570 946
571void 947void
572aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 948aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
573 SV * fh 949 SV * fh
574 UV offset 950 UV offset
575 IV length 951 UV length
576 SV * data 952 SV * data
577 IV dataoffset 953 UV dataoffset
578 SV * callback 954 SV * callback
579 ALIAS: 955 ALIAS:
580 aio_read = REQ_READ 956 aio_read = REQ_READ
581 aio_write = REQ_WRITE 957 aio_write = REQ_WRITE
582 PROTOTYPE: $$$$$;$ 958 PROTOTYPE: $$$$$;$
583 CODE: 959 PPCODE:
584{ 960{
585 aio_req req; 961 aio_req req;
586 STRLEN svlen; 962 STRLEN svlen;
587 char *svptr = SvPVbyte (data, svlen); 963 char *svptr = SvPVbyte (data, svlen);
588 964
… …
619 : IoOFP (sv_2io (fh))); 995 : IoOFP (sv_2io (fh)));
620 req->offset = offset; 996 req->offset = offset;
621 req->length = length; 997 req->length = length;
622 req->data = SvREFCNT_inc (data); 998 req->data = SvREFCNT_inc (data);
623 req->dataptr = (char *)svptr + dataoffset; 999 req->dataptr = (char *)svptr + dataoffset;
624 req->callback = SvREFCNT_inc (callback);
625 1000
626 send_req (req); 1001 if (!SvREADONLY (data))
1002 {
1003 SvREADONLY_on (data);
1004 req->data2ptr = (void *)data;
1005 }
1006
1007 REQ_SEND;
627 } 1008 }
628} 1009}
629 1010
630void 1011void
1012aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1013 SV * out_fh
1014 SV * in_fh
1015 UV in_offset
1016 UV length
1017 SV * callback
1018 PROTOTYPE: $$$$;$
1019 PPCODE:
1020{
1021 dREQ;
1022
1023 req->type = REQ_SENDFILE;
1024 req->fh = newSVsv (out_fh);
1025 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1026 req->fh2 = newSVsv (in_fh);
1027 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1028 req->offset = in_offset;
1029 req->length = length;
1030
1031 REQ_SEND;
1032}
1033
1034void
631aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1035aio_readahead (fh,offset,length,callback=&PL_sv_undef)
632 SV * fh 1036 SV * fh
633 UV offset 1037 UV offset
634 IV length 1038 IV length
635 SV * callback 1039 SV * callback
636 PROTOTYPE: $$$;$ 1040 PROTOTYPE: $$$;$
637 CODE: 1041 PPCODE:
638{ 1042{
639 dREQ; 1043 dREQ;
640 1044
641 req->type = REQ_READAHEAD; 1045 req->type = REQ_READAHEAD;
642 req->fh = newSVsv (fh); 1046 req->fh = newSVsv (fh);
643 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1047 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
644 req->offset = offset; 1048 req->offset = offset;
645 req->length = length; 1049 req->length = length;
646 1050
647 send_req (req); 1051 REQ_SEND;
648} 1052}
649 1053
650void 1054void
651aio_stat(fh_or_path,callback=&PL_sv_undef) 1055aio_stat (fh_or_path,callback=&PL_sv_undef)
652 SV * fh_or_path 1056 SV * fh_or_path
653 SV * callback 1057 SV * callback
654 ALIAS: 1058 ALIAS:
655 aio_stat = REQ_STAT 1059 aio_stat = REQ_STAT
656 aio_lstat = REQ_LSTAT 1060 aio_lstat = REQ_LSTAT
657 CODE: 1061 PPCODE:
658{ 1062{
659 dREQ; 1063 dREQ;
660 1064
661 New (0, req->statdata, 1, Stat_t); 1065 New (0, req->statdata, 1, Stat_t);
662 if (!req->statdata) 1066 if (!req->statdata)
1067 {
1068 req_free (req);
663 croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)"); 1069 croak ("out of memory during aio_req->statdata allocation");
1070 }
664 1071
665 if (SvPOK (fh_or_path)) 1072 if (SvPOK (fh_or_path))
666 { 1073 {
667 req->type = ix; 1074 req->type = ix;
668 req->data = newSVsv (fh_or_path); 1075 req->data = newSVsv (fh_or_path);
… …
673 req->type = REQ_FSTAT; 1080 req->type = REQ_FSTAT;
674 req->fh = newSVsv (fh_or_path); 1081 req->fh = newSVsv (fh_or_path);
675 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1082 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
676 } 1083 }
677 1084
678 send_req (req); 1085 REQ_SEND;
679} 1086}
680 1087
681void 1088void
682aio_unlink(pathname,callback=&PL_sv_undef) 1089aio_unlink (pathname,callback=&PL_sv_undef)
683 SV * pathname 1090 SV * pathname
684 SV * callback 1091 SV * callback
685 ALIAS: 1092 ALIAS:
686 aio_unlink = REQ_UNLINK 1093 aio_unlink = REQ_UNLINK
687 aio_rmdir = REQ_RMDIR 1094 aio_rmdir = REQ_RMDIR
1095 aio_readdir = REQ_READDIR
688 CODE: 1096 PPCODE:
689{ 1097{
690 dREQ; 1098 dREQ;
691 1099
692 req->type = ix; 1100 req->type = ix;
693 req->data = newSVsv (pathname); 1101 req->data = newSVsv (pathname);
694 req->dataptr = SvPVbyte_nolen (req->data); 1102 req->dataptr = SvPVbyte_nolen (req->data);
695 1103
696 send_req (req); 1104 REQ_SEND;
697} 1105}
698 1106
699void 1107void
700aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1108aio_link (oldpath,newpath,callback=&PL_sv_undef)
701 SV * oldpath 1109 SV * oldpath
702 SV * newpath 1110 SV * newpath
703 SV * callback 1111 SV * callback
1112 ALIAS:
1113 aio_link = REQ_LINK
1114 aio_symlink = REQ_SYMLINK
1115 aio_rename = REQ_RENAME
704 CODE: 1116 PPCODE:
705{ 1117{
706 dREQ; 1118 dREQ;
707 1119
708 req->type = REQ_SYMLINK; 1120 req->type = ix;
709 req->fh = newSVsv (oldpath); 1121 req->fh = newSVsv (oldpath);
710 req->data2ptr = SvPVbyte_nolen (req->fh); 1122 req->data2ptr = SvPVbyte_nolen (req->fh);
711 req->data = newSVsv (newpath); 1123 req->data = newSVsv (newpath);
712 req->dataptr = SvPVbyte_nolen (req->data); 1124 req->dataptr = SvPVbyte_nolen (req->data);
713 1125
714 send_req (req); 1126 REQ_SEND;
715} 1127}
716 1128
717void 1129void
1130aio_sleep (delay,callback=&PL_sv_undef)
1131 double delay
1132 SV * callback
1133 PPCODE:
1134{
1135 dREQ;
1136
1137 req->type = REQ_SLEEP;
1138 req->fd = delay < 0. ? 0 : delay;
1139 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1140
1141 REQ_SEND;
1142}
1143
1144void
1145aio_group (callback=&PL_sv_undef)
1146 SV * callback
1147 PROTOTYPE: ;&
1148 PPCODE:
1149{
1150 dREQ;
1151 req->type = REQ_GROUP;
1152 req->grp_next = req;
1153 req->grp_prev = req;
1154
1155 req_send (req);
1156 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1157}
1158
1159void
718flush() 1160flush ()
719 PROTOTYPE: 1161 PROTOTYPE:
720 CODE: 1162 CODE:
721 while (nreqs) 1163 while (nreqs)
722 { 1164 {
723 poll_wait (); 1165 poll_wait ();
… …
763 CODE: 1205 CODE:
764 RETVAL = nreqs; 1206 RETVAL = nreqs;
765 OUTPUT: 1207 OUTPUT:
766 RETVAL 1208 RETVAL
767 1209
1210MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1211
1212void
1213cancel (aio_req_ornot req)
1214 PROTOTYPE:
1215 CODE:
1216 req_cancel (req);
1217
1218MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1219
1220void
1221add (aio_req grp, ...)
1222 PROTOTYPE: $;@
1223 PPCODE:
1224{
1225 int i;
1226
1227 for (i = 1; i < items; ++i )
1228 {
1229 aio_req req = SvAIO_REQ (ST (i));
1230
1231 req->grp_prev = grp;
1232 req->grp_next = grp->grp_next;
1233 grp->grp_next->grp_prev = req;
1234 grp->grp_next = req;
1235
1236 req->grp = grp;
1237
1238 if (GIMME_V != G_VOID)
1239 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1240 }
1241}
1242

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