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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.23 by root, Tue Aug 16 23:33:34 2005 UTC vs.
Revision 1.45 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 107static void req_free (aio_req req);
74poll_wait () 108
109/* must be called at most once */
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);
114
115 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
116}
117
118static aio_req SvAIO_REQ (SV *sv)
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 ()
75{ 129{
76 if (nreqs && !ress) 130 if (nreqs && !ress)
77 { 131 {
78 fd_set rfd; 132 fd_set rfd;
79 FD_ZERO(&rfd); 133 FD_ZERO(&rfd);
… …
81 135
82 select (respipe [0] + 1, &rfd, 0, 0, 0); 136 select (respipe [0] + 1, &rfd, 0, 0, 0);
83 } 137 }
84} 138}
85 139
86static int 140static void req_invoke (aio_req req)
87poll_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 ()
88{ 280{
89 dSP; 281 dSP;
90 int count = 0; 282 int count = 0;
283 int do_croak = 0;
91 aio_req req, prv; 284 aio_req req;
92 285
286 for (;;)
287 {
93 pthread_mutex_lock (&reslock); 288 pthread_mutex_lock (&reslock);
289 req = ress;
94 290
95 { 291 if (req)
292 {
293 ress = req->next;
294
295 if (!ress)
296 {
96 /* read any signals sent by the worker threads */ 297 /* read any signals sent by the worker threads */
97 char buf [32]; 298 char buf [32];
98 while (read (respipe [0], buf, 32) == 32) 299 while (read (respipe [0], buf, 32) == 32)
300 ;
301
302 rese = 0;
303 }
99 ; 304 }
100 }
101 305
102 req = ress;
103 ress = rese = 0;
104
105 pthread_mutex_unlock (&reslock); 306 pthread_mutex_unlock (&reslock);
106 307
107 while (req) 308 if (!req)
108 { 309 break;
310
109 nreqs--; 311 nreqs--;
110 312
111 if (req->type == REQ_QUIT) 313 if (req->type == REQ_QUIT)
112 started--; 314 started--;
315 else if (req->type == REQ_GROUP && req->grp_next != req)
316 continue;
113 else 317 else
114 { 318 {
115 int errorno = errno;
116 errno = req->errorno;
117
118 if (req->type == REQ_READ) 319 if (req->type == REQ_READ)
119 SvCUR_set (req->data, req->dataoffset 320 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
120 + req->result > 0 ? req->result : 0);
121 321
322 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
323 SvREADONLY_off (req->data);
324
122 if (req->data) 325 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 { 326 {
130 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 327 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131 PL_laststatval = req->result; 328 PL_laststatval = req->result;
132 PL_statcache = *(req->statdata); 329 PL_statcache = *(req->statdata);
133
134 Safefree (req->statdata);
135 } 330 }
136 331
137 ENTER; 332 req_invoke (req);
138 PUSHMARK (SP);
139 XPUSHs (sv_2mortal (newSViv (req->result)));
140 333
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++; 334 count++;
170 } 335 }
171 336
172 prv = req;
173 req = req->next;
174 Safefree (prv); 337 req_free (req);
175
176 /* TODO: croak on errors? */
177 } 338 }
178 339
179 return count; 340 return count;
180} 341}
181 342
182static void *aio_proc(void *arg); 343static void *aio_proc(void *arg);
183 344
184static void
185start_thread (void) 345static void start_thread (void)
186{ 346{
187 sigset_t fullsigset, oldsigset; 347 sigset_t fullsigset, oldsigset;
188 pthread_t tid; 348 pthread_t tid;
189 pthread_attr_t attr; 349 pthread_attr_t attr;
190 350
… …
199 started++; 359 started++;
200 360
201 sigprocmask (SIG_SETMASK, &oldsigset, 0); 361 sigprocmask (SIG_SETMASK, &oldsigset, 0);
202} 362}
203 363
204static void 364static void req_send (aio_req req)
205send_req (aio_req req)
206{ 365{
366 while (started < wanted && nreqs >= started)
367 start_thread ();
368
207 nreqs++; 369 nreqs++;
208 370
209 pthread_mutex_lock (&reqlock); 371 pthread_mutex_lock (&reqlock);
210 372
211 req->next = 0; 373 req->next = 0;
… …
219 reqe = reqs = req; 381 reqe = reqs = req;
220 382
221 pthread_cond_signal (&reqwait); 383 pthread_cond_signal (&reqwait);
222 pthread_mutex_unlock (&reqlock); 384 pthread_mutex_unlock (&reqlock);
223 385
224 while (nreqs > max_outstanding) 386 if (nreqs > max_outstanding)
387 for (;;)
388 {
389 poll_cb ();
390
391 if (nreqs <= max_outstanding)
392 break;
393
394 poll_wait ();
395 }
396}
397
398static void end_thread (void)
399{
400 aio_req req;
401 Newz (0, req, 1, aio_cb);
402 req->type = REQ_QUIT;
403
404 req_send (req);
405}
406
407static void min_parallel (int nthreads)
408{
409 if (wanted < nthreads)
410 wanted = nthreads;
411}
412
413static void max_parallel (int nthreads)
414{
415 int cur = started;
416
417 if (wanted > nthreads)
418 wanted = nthreads;
419
420 while (cur > wanted)
421 {
422 end_thread ();
423 cur--;
424 }
425
426 while (started > wanted)
225 { 427 {
226 poll_wait (); 428 poll_wait ();
227 poll_cb (); 429 poll_cb ();
228 } 430 }
229} 431}
230 432
231static void 433static void create_pipe ()
232end_thread (void)
233{ 434{
234 aio_req req; 435 if (pipe (respipe))
235 New (0, req, 1, aio_cb); 436 croak ("unable to initialize result pipe");
236 req->type = REQ_QUIT;
237 437
238 send_req (req); 438 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
239} 439 croak ("cannot set result pipe to nonblocking mode");
240 440
241 441 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
242static void min_parallel (int nthreads) 442 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} 443}
313 444
314/*****************************************************************************/ 445/*****************************************************************************/
315/* work around various missing functions */ 446/* work around various missing functions */
316 447
… …
321/* 452/*
322 * make our pread/pwrite safe against themselves, but not against 453 * make our pread/pwrite safe against themselves, but not against
323 * 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,
324 * but that's your problem, not mine. 455 * but that's your problem, not mine.
325 */ 456 */
326static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 457static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
327 458
328static ssize_t 459static 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{ 460{
331 ssize_t res; 461 ssize_t res;
332 off_t ooffset; 462 off_t ooffset;
333 463
334 pthread_mutex_lock (&iolock); 464 pthread_mutex_lock (&preadwritelock);
335 ooffset = lseek (fd, 0, SEEK_CUR); 465 ooffset = lseek (fd, 0, SEEK_CUR);
336 lseek (fd, offset, SEEK_SET); 466 lseek (fd, offset, SEEK_SET);
337 res = read (fd, buf, count); 467 res = read (fd, buf, count);
338 lseek (fd, ooffset, SEEK_SET); 468 lseek (fd, ooffset, SEEK_SET);
339 pthread_mutex_unlock (&iolock); 469 pthread_mutex_unlock (&preadwritelock);
340 470
341 return res; 471 return res;
342} 472}
343 473
344static ssize_t
345pwrite (int fd, void *buf, size_t count, off_t offset) 474static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
346{ 475{
347 ssize_t res; 476 ssize_t res;
348 off_t ooffset; 477 off_t ooffset;
349 478
350 pthread_mutex_lock (&iolock); 479 pthread_mutex_lock (&preadwritelock);
351 ooffset = lseek (fd, 0, SEEK_CUR); 480 ooffset = lseek (fd, 0, SEEK_CUR);
352 lseek (fd, offset, SEEK_SET); 481 lseek (fd, offset, SEEK_SET);
353 res = write (fd, buf, count); 482 res = write (fd, buf, count);
354 lseek (fd, offset, SEEK_SET); 483 lseek (fd, offset, SEEK_SET);
355 pthread_mutex_unlock (&iolock); 484 pthread_mutex_unlock (&preadwritelock);
356 485
357 return res; 486 return res;
358} 487}
359#endif 488#endif
360 489
… …
363#endif 492#endif
364 493
365#if !HAVE_READAHEAD 494#if !HAVE_READAHEAD
366# define readahead aio_readahead 495# define readahead aio_readahead
367 496
497static ssize_t readahead (int fd, off_t offset, size_t count)
498{
368static char readahead_buf[4096]; 499 char readahead_buf[4096];
369 500
370static ssize_t
371readahead (int fd, off_t offset, size_t count)
372{
373 while (count > 0) 501 while (count > 0)
374 { 502 {
375 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 503 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
376 504
377 pread (fd, readahead_buf, len, offset); 505 pread (fd, readahead_buf, len, offset);
… …
381 509
382 errno = 0; 510 errno = 0;
383} 511}
384#endif 512#endif
385 513
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
386/*****************************************************************************/ 699/*****************************************************************************/
387 700
388static void *
389aio_proc (void *thr_arg) 701static void *aio_proc (void *thr_arg)
390{ 702{
391 aio_req req; 703 aio_req req;
392 int type; 704 int type;
393 705
394 do 706 do
… …
413 725
414 pthread_mutex_unlock (&reqlock); 726 pthread_mutex_unlock (&reqlock);
415 727
416 errno = 0; /* strictly unnecessary */ 728 errno = 0; /* strictly unnecessary */
417 729
418 type = req->type; 730 if (!req->cancelled)
419
420 switch (type) 731 switch (req->type)
421 { 732 {
422 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;
423 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;
424 735
425 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;
426 738
427 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 739 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
428 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 740 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
429 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 741 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430 742
431 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;
432 case REQ_CLOSE: req->result = close (req->fd); break; 744 case REQ_CLOSE: req->result = close (req->fd); break;
433 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 745 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434 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;
435 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 749 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
436 750
437 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 751 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438 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;
439 754
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
440 case REQ_QUIT: 765 case REQ_QUIT:
441 break; 766 break;
442 767
443 default: 768 default:
444 req->result = ENOSYS; 769 req->result = ENOSYS;
445 break; 770 break;
446 } 771 }
447 772
448 req->errorno = errno; 773 req->errorno = errno;
449 774
450 pthread_mutex_lock (&reslock); 775 pthread_mutex_lock (&reslock);
451 776
… …
469 while (type != REQ_QUIT); 794 while (type != REQ_QUIT);
470 795
471 return 0; 796 return 0;
472} 797}
473 798
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
474#define dREQ \ 856#define dREQ \
475 aio_req req; \ 857 aio_req req; \
476 \ 858 \
477 if (SvOK (callback) && !SvROK (callback)) \ 859 if (SvOK (callback) && !SvROK (callback)) \
478 croak ("clalback must be undef or of reference type"); \ 860 croak ("callback must be undef or of reference type"); \
479 \ 861 \
480 Newz (0, req, 1, aio_cb); \ 862 Newz (0, req, 1, aio_cb); \
481 if (!req) \ 863 if (!req) \
482 croak ("out of memory during aio_req allocation"); \ 864 croak ("out of memory during aio_req allocation"); \
483 \ 865 \
484 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));
485 873
486MODULE = IO::AIO PACKAGE = IO::AIO 874MODULE = IO::AIO PACKAGE = IO::AIO
487 875
488PROTOTYPES: ENABLE 876PROTOTYPES: ENABLE
489 877
490BOOT: 878BOOT:
491{ 879{
492 if (pipe (respipe)) 880 HV *stash = gv_stashpv ("IO::AIO", 1);
493 croak ("unable to initialize result pipe"); 881 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
882 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
883 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
494 884
495 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 885 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); 886 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
502} 887}
503 888
504void 889void
505min_parallel(nthreads) 890min_parallel (nthreads)
506 int nthreads 891 int nthreads
507 PROTOTYPE: $ 892 PROTOTYPE: $
508 893
509void 894void
510max_parallel(nthreads) 895max_parallel (nthreads)
511 int nthreads 896 int nthreads
512 PROTOTYPE: $ 897 PROTOTYPE: $
513 898
514int 899int
515max_outstanding(nreqs) 900max_outstanding (nreqs)
516 int nreqs 901 int nreqs
517 PROTOTYPE: $ 902 PROTOTYPE: $
518 CODE: 903 CODE:
519 RETVAL = max_outstanding; 904 RETVAL = max_outstanding;
520 max_outstanding = nreqs; 905 max_outstanding = nreqs;
521 906
522void 907void
523aio_open(pathname,flags,mode,callback=&PL_sv_undef) 908aio_open (pathname,flags,mode,callback=&PL_sv_undef)
524 SV * pathname 909 SV * pathname
525 int flags 910 int flags
526 int mode 911 int mode
527 SV * callback 912 SV * callback
528 PROTOTYPE: $$$;$ 913 PROTOTYPE: $$$;$
529 CODE: 914 PPCODE:
530{ 915{
531 dREQ; 916 dREQ;
532 917
533 req->type = REQ_OPEN; 918 req->type = REQ_OPEN;
534 req->data = newSVsv (pathname); 919 req->data = newSVsv (pathname);
535 req->dataptr = SvPVbyte_nolen (req->data); 920 req->dataptr = SvPVbyte_nolen (req->data);
536 req->fd = flags; 921 req->fd = flags;
537 req->mode = mode; 922 req->mode = mode;
538 923
539 send_req (req); 924 REQ_SEND;
540} 925}
541 926
542void 927void
543aio_close(fh,callback=&PL_sv_undef) 928aio_close (fh,callback=&PL_sv_undef)
544 SV * fh 929 SV * fh
545 SV * callback 930 SV * callback
546 PROTOTYPE: $;$ 931 PROTOTYPE: $;$
547 ALIAS: 932 ALIAS:
548 aio_close = REQ_CLOSE 933 aio_close = REQ_CLOSE
549 aio_fsync = REQ_FSYNC 934 aio_fsync = REQ_FSYNC
550 aio_fdatasync = REQ_FDATASYNC 935 aio_fdatasync = REQ_FDATASYNC
551 CODE: 936 PPCODE:
552{ 937{
553 dREQ; 938 dREQ;
554 939
555 req->type = ix; 940 req->type = ix;
556 req->fh = newSVsv (fh); 941 req->fh = newSVsv (fh);
557 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 942 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
558 943
559 send_req (req); 944 REQ_SEND (req);
560} 945}
561 946
562void 947void
563aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 948aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
564 SV * fh 949 SV * fh
565 UV offset 950 UV offset
566 IV length 951 UV length
567 SV * data 952 SV * data
568 IV dataoffset 953 UV dataoffset
569 SV * callback 954 SV * callback
570 ALIAS: 955 ALIAS:
571 aio_read = REQ_READ 956 aio_read = REQ_READ
572 aio_write = REQ_WRITE 957 aio_write = REQ_WRITE
573 PROTOTYPE: $$$$$;$ 958 PROTOTYPE: $$$$$;$
574 CODE: 959 PPCODE:
575{ 960{
576 aio_req req; 961 aio_req req;
577 STRLEN svlen; 962 STRLEN svlen;
578 char *svptr = SvPVbyte (data, svlen); 963 char *svptr = SvPVbyte (data, svlen);
579 964
… …
610 : IoOFP (sv_2io (fh))); 995 : IoOFP (sv_2io (fh)));
611 req->offset = offset; 996 req->offset = offset;
612 req->length = length; 997 req->length = length;
613 req->data = SvREFCNT_inc (data); 998 req->data = SvREFCNT_inc (data);
614 req->dataptr = (char *)svptr + dataoffset; 999 req->dataptr = (char *)svptr + dataoffset;
615 req->callback = SvREFCNT_inc (callback);
616 1000
617 send_req (req); 1001 if (!SvREADONLY (data))
1002 {
1003 SvREADONLY_on (data);
1004 req->data2ptr = (void *)data;
1005 }
1006
1007 REQ_SEND;
618 } 1008 }
619} 1009}
620 1010
621void 1011void
1012aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1013 SV * out_fh
1014 SV * in_fh
1015 UV in_offset
1016 UV length
1017 SV * callback
1018 PROTOTYPE: $$$$;$
1019 PPCODE:
1020{
1021 dREQ;
1022
1023 req->type = REQ_SENDFILE;
1024 req->fh = newSVsv (out_fh);
1025 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1026 req->fh2 = newSVsv (in_fh);
1027 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1028 req->offset = in_offset;
1029 req->length = length;
1030
1031 REQ_SEND;
1032}
1033
1034void
622aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1035aio_readahead (fh,offset,length,callback=&PL_sv_undef)
623 SV * fh 1036 SV * fh
624 UV offset 1037 UV offset
625 IV length 1038 IV length
626 SV * callback 1039 SV * callback
627 PROTOTYPE: $$$;$ 1040 PROTOTYPE: $$$;$
628 CODE: 1041 PPCODE:
629{ 1042{
630 dREQ; 1043 dREQ;
631 1044
632 req->type = REQ_READAHEAD; 1045 req->type = REQ_READAHEAD;
633 req->fh = newSVsv (fh); 1046 req->fh = newSVsv (fh);
634 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1047 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
635 req->offset = offset; 1048 req->offset = offset;
636 req->length = length; 1049 req->length = length;
637 1050
638 send_req (req); 1051 REQ_SEND;
639} 1052}
640 1053
641void 1054void
642aio_stat(fh_or_path,callback=&PL_sv_undef) 1055aio_stat (fh_or_path,callback=&PL_sv_undef)
643 SV * fh_or_path 1056 SV * fh_or_path
644 SV * callback 1057 SV * callback
645 ALIAS: 1058 ALIAS:
646 aio_stat = REQ_STAT 1059 aio_stat = REQ_STAT
647 aio_lstat = REQ_LSTAT 1060 aio_lstat = REQ_LSTAT
648 CODE: 1061 PPCODE:
649{ 1062{
650 dREQ; 1063 dREQ;
651 1064
652 New (0, req->statdata, 1, Stat_t); 1065 New (0, req->statdata, 1, Stat_t);
653 if (!req->statdata) 1066 if (!req->statdata)
1067 {
1068 req_free (req);
654 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 }
655 1071
656 if (SvPOK (fh_or_path)) 1072 if (SvPOK (fh_or_path))
657 { 1073 {
658 req->type = ix; 1074 req->type = ix;
659 req->data = newSVsv (fh_or_path); 1075 req->data = newSVsv (fh_or_path);
… …
664 req->type = REQ_FSTAT; 1080 req->type = REQ_FSTAT;
665 req->fh = newSVsv (fh_or_path); 1081 req->fh = newSVsv (fh_or_path);
666 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1082 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
667 } 1083 }
668 1084
669 send_req (req); 1085 REQ_SEND;
670} 1086}
671 1087
672void 1088void
673aio_unlink(pathname,callback=&PL_sv_undef) 1089aio_unlink (pathname,callback=&PL_sv_undef)
674 SV * pathname 1090 SV * pathname
675 SV * callback 1091 SV * callback
676 ALIAS: 1092 ALIAS:
677 aio_unlink = REQ_UNLINK 1093 aio_unlink = REQ_UNLINK
678 aio_rmdir = REQ_RMDIR 1094 aio_rmdir = REQ_RMDIR
1095 aio_readdir = REQ_READDIR
679 CODE: 1096 PPCODE:
680{ 1097{
681 dREQ; 1098 dREQ;
682 1099
683 req->type = ix; 1100 req->type = ix;
684 req->data = newSVsv (pathname); 1101 req->data = newSVsv (pathname);
685 req->dataptr = SvPVbyte_nolen (req->data); 1102 req->dataptr = SvPVbyte_nolen (req->data);
686 1103
687 send_req (req); 1104 REQ_SEND;
688} 1105}
689 1106
690void 1107void
691aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1108aio_link (oldpath,newpath,callback=&PL_sv_undef)
692 SV * oldpath 1109 SV * oldpath
693 SV * newpath 1110 SV * newpath
694 SV * callback 1111 SV * callback
1112 ALIAS:
1113 aio_link = REQ_LINK
1114 aio_symlink = REQ_SYMLINK
1115 aio_rename = REQ_RENAME
695 CODE: 1116 PPCODE:
696{ 1117{
697 dREQ; 1118 dREQ;
698 1119
699 req->type = REQ_SYMLINK; 1120 req->type = ix;
700 req->fh = newSVsv (oldpath); 1121 req->fh = newSVsv (oldpath);
701 req->data2ptr = SvPVbyte_nolen (req->fh); 1122 req->data2ptr = SvPVbyte_nolen (req->fh);
702 req->data = newSVsv (newpath); 1123 req->data = newSVsv (newpath);
703 req->dataptr = SvPVbyte_nolen (req->data); 1124 req->dataptr = SvPVbyte_nolen (req->data);
704 1125
705 send_req (req); 1126 REQ_SEND;
706} 1127}
707 1128
708void 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
709flush() 1160flush ()
710 PROTOTYPE: 1161 PROTOTYPE:
711 CODE: 1162 CODE:
712 while (nreqs) 1163 while (nreqs)
713 { 1164 {
714 poll_wait (); 1165 poll_wait ();
… …
754 CODE: 1205 CODE:
755 RETVAL = nreqs; 1206 RETVAL = nreqs;
756 OUTPUT: 1207 OUTPUT:
757 RETVAL 1208 RETVAL
758 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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