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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 1.45 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;
91 int do_croak = 0; 283 int do_croak = 0;
92 aio_req req, prv; 284 aio_req req;
93 285
286 for (;;)
287 {
94 pthread_mutex_lock (&reslock); 288 pthread_mutex_lock (&reslock);
289 req = ress;
95 290
96 { 291 if (req)
292 {
293 ress = req->next;
294
295 if (!ress)
296 {
97 /* read any signals sent by the worker threads */ 297 /* read any signals sent by the worker threads */
98 char buf [32]; 298 char buf [32];
99 while (read (respipe [0], buf, 32) == 32) 299 while (read (respipe [0], buf, 32) == 32)
300 ;
301
302 rese = 0;
303 }
100 ; 304 }
101 }
102 305
103 req = ress;
104 ress = rese = 0;
105
106 pthread_mutex_unlock (&reslock); 306 pthread_mutex_unlock (&reslock);
107 307
108 while (req) 308 if (!req)
109 { 309 break;
310
110 nreqs--; 311 nreqs--;
111 312
112 if (req->type == REQ_QUIT) 313 if (req->type == REQ_QUIT)
113 started--; 314 started--;
315 else if (req->type == REQ_GROUP && req->grp_next != req)
316 continue;
114 else 317 else
115 { 318 {
116 int errorno = errno;
117 errno = req->errorno;
118
119 if (req->type == REQ_READ) 319 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset 320 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121 + req->result > 0 ? req->result : 0);
122 321
322 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
323 SvREADONLY_off (req->data);
324
123 if (req->data) 325 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 { 326 {
131 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 327 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
132 PL_laststatval = req->result; 328 PL_laststatval = req->result;
133 PL_statcache = *(req->statdata); 329 PL_statcache = *(req->statdata);
134
135 Safefree (req->statdata);
136 } 330 }
137 331
138 ENTER; 332 req_invoke (req);
139 PUSHMARK (SP);
140 XPUSHs (sv_2mortal (newSViv (req->result)));
141 333
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++; 334 count++;
173 } 335 }
174 336
175 prv = req;
176 req = req->next;
177 Safefree (prv); 337 req_free (req);
178
179 if (do_croak)
180 croak (0);
181 } 338 }
182 339
183 return count; 340 return count;
184} 341}
185 342
186static void *aio_proc(void *arg); 343static void *aio_proc(void *arg);
187 344
188static void
189start_thread (void) 345static void start_thread (void)
190{ 346{
191 sigset_t fullsigset, oldsigset; 347 sigset_t fullsigset, oldsigset;
192 pthread_t tid; 348 pthread_t tid;
193 pthread_attr_t attr; 349 pthread_attr_t attr;
194 350
… …
203 started++; 359 started++;
204 360
205 sigprocmask (SIG_SETMASK, &oldsigset, 0); 361 sigprocmask (SIG_SETMASK, &oldsigset, 0);
206} 362}
207 363
208static void 364static void req_send (aio_req req)
209send_req (aio_req req)
210{ 365{
366 while (started < wanted && nreqs >= started)
367 start_thread ();
368
211 nreqs++; 369 nreqs++;
212 370
213 pthread_mutex_lock (&reqlock); 371 pthread_mutex_lock (&reqlock);
214 372
215 req->next = 0; 373 req->next = 0;
… …
223 reqe = reqs = req; 381 reqe = reqs = req;
224 382
225 pthread_cond_signal (&reqwait); 383 pthread_cond_signal (&reqwait);
226 pthread_mutex_unlock (&reqlock); 384 pthread_mutex_unlock (&reqlock);
227 385
228 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)
229 { 427 {
230 poll_wait (); 428 poll_wait ();
231 poll_cb (); 429 poll_cb ();
232 } 430 }
233} 431}
234 432
235static void 433static void create_pipe ()
236end_thread (void)
237{ 434{
238 aio_req req; 435 if (pipe (respipe))
239 New (0, req, 1, aio_cb); 436 croak ("unable to initialize result pipe");
240 req->type = REQ_QUIT;
241 437
242 send_req (req); 438 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
243} 439 croak ("cannot set result pipe to nonblocking mode");
244 440
245 441 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
246static void min_parallel (int nthreads) 442 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} 443}
317 444
318/*****************************************************************************/ 445/*****************************************************************************/
319/* work around various missing functions */ 446/* work around various missing functions */
320 447
… …
325/* 452/*
326 * make our pread/pwrite safe against themselves, but not against 453 * make our pread/pwrite safe against themselves, but not against
327 * 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,
328 * but that's your problem, not mine. 455 * but that's your problem, not mine.
329 */ 456 */
330static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 457static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
331 458
332static ssize_t 459static 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{ 460{
335 ssize_t res; 461 ssize_t res;
336 off_t ooffset; 462 off_t ooffset;
337 463
338 pthread_mutex_lock (&iolock); 464 pthread_mutex_lock (&preadwritelock);
339 ooffset = lseek (fd, 0, SEEK_CUR); 465 ooffset = lseek (fd, 0, SEEK_CUR);
340 lseek (fd, offset, SEEK_SET); 466 lseek (fd, offset, SEEK_SET);
341 res = read (fd, buf, count); 467 res = read (fd, buf, count);
342 lseek (fd, ooffset, SEEK_SET); 468 lseek (fd, ooffset, SEEK_SET);
343 pthread_mutex_unlock (&iolock); 469 pthread_mutex_unlock (&preadwritelock);
344 470
345 return res; 471 return res;
346} 472}
347 473
348static ssize_t
349pwrite (int fd, void *buf, size_t count, off_t offset) 474static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
350{ 475{
351 ssize_t res; 476 ssize_t res;
352 off_t ooffset; 477 off_t ooffset;
353 478
354 pthread_mutex_lock (&iolock); 479 pthread_mutex_lock (&preadwritelock);
355 ooffset = lseek (fd, 0, SEEK_CUR); 480 ooffset = lseek (fd, 0, SEEK_CUR);
356 lseek (fd, offset, SEEK_SET); 481 lseek (fd, offset, SEEK_SET);
357 res = write (fd, buf, count); 482 res = write (fd, buf, count);
358 lseek (fd, offset, SEEK_SET); 483 lseek (fd, offset, SEEK_SET);
359 pthread_mutex_unlock (&iolock); 484 pthread_mutex_unlock (&preadwritelock);
360 485
361 return res; 486 return res;
362} 487}
363#endif 488#endif
364 489
… …
367#endif 492#endif
368 493
369#if !HAVE_READAHEAD 494#if !HAVE_READAHEAD
370# define readahead aio_readahead 495# define readahead aio_readahead
371 496
497static ssize_t readahead (int fd, off_t offset, size_t count)
498{
372static char readahead_buf[4096]; 499 char readahead_buf[4096];
373 500
374static ssize_t
375readahead (int fd, off_t offset, size_t count)
376{
377 while (count > 0) 501 while (count > 0)
378 { 502 {
379 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 503 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
380 504
381 pread (fd, readahead_buf, len, offset); 505 pread (fd, readahead_buf, len, offset);
… …
385 509
386 errno = 0; 510 errno = 0;
387} 511}
388#endif 512#endif
389 513
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
390/*****************************************************************************/ 699/*****************************************************************************/
391 700
392static void *
393aio_proc (void *thr_arg) 701static void *aio_proc (void *thr_arg)
394{ 702{
395 aio_req req; 703 aio_req req;
396 int type; 704 int type;
397 705
398 do 706 do
… …
417 725
418 pthread_mutex_unlock (&reqlock); 726 pthread_mutex_unlock (&reqlock);
419 727
420 errno = 0; /* strictly unnecessary */ 728 errno = 0; /* strictly unnecessary */
421 729
422 type = req->type; 730 if (!req->cancelled)
423
424 switch (type) 731 switch (req->type)
425 { 732 {
426 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;
427 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;
428 735
429 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;
430 738
431 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 739 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
432 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 740 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
433 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 741 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
434 742
435 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;
436 case REQ_CLOSE: req->result = close (req->fd); break; 744 case REQ_CLOSE: req->result = close (req->fd); break;
437 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 745 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
438 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;
439 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 749 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
440 750
441 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 751 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
442 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;
443 754
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
444 case REQ_QUIT: 765 case REQ_QUIT:
445 break; 766 break;
446 767
447 default: 768 default:
448 req->result = ENOSYS; 769 req->result = ENOSYS;
449 break; 770 break;
450 } 771 }
451 772
452 req->errorno = errno; 773 req->errorno = errno;
453 774
454 pthread_mutex_lock (&reslock); 775 pthread_mutex_lock (&reslock);
455 776
… …
473 while (type != REQ_QUIT); 794 while (type != REQ_QUIT);
474 795
475 return 0; 796 return 0;
476} 797}
477 798
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
478#define dREQ \ 856#define dREQ \
479 aio_req req; \ 857 aio_req req; \
480 \ 858 \
481 if (SvOK (callback) && !SvROK (callback)) \ 859 if (SvOK (callback) && !SvROK (callback)) \
482 croak ("clalback must be undef or of reference type"); \ 860 croak ("callback must be undef or of reference type"); \
483 \ 861 \
484 Newz (0, req, 1, aio_cb); \ 862 Newz (0, req, 1, aio_cb); \
485 if (!req) \ 863 if (!req) \
486 croak ("out of memory during aio_req allocation"); \ 864 croak ("out of memory during aio_req allocation"); \
487 \ 865 \
488 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));
489 873
490MODULE = IO::AIO PACKAGE = IO::AIO 874MODULE = IO::AIO PACKAGE = IO::AIO
491 875
492PROTOTYPES: ENABLE 876PROTOTYPES: ENABLE
493 877
494BOOT: 878BOOT:
495{ 879{
496 if (pipe (respipe)) 880 HV *stash = gv_stashpv ("IO::AIO", 1);
497 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));
498 884
499 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 885 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); 886 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
506} 887}
507 888
508void 889void
509min_parallel(nthreads) 890min_parallel (nthreads)
510 int nthreads 891 int nthreads
511 PROTOTYPE: $ 892 PROTOTYPE: $
512 893
513void 894void
514max_parallel(nthreads) 895max_parallel (nthreads)
515 int nthreads 896 int nthreads
516 PROTOTYPE: $ 897 PROTOTYPE: $
517 898
518int 899int
519max_outstanding(nreqs) 900max_outstanding (nreqs)
520 int nreqs 901 int nreqs
521 PROTOTYPE: $ 902 PROTOTYPE: $
522 CODE: 903 CODE:
523 RETVAL = max_outstanding; 904 RETVAL = max_outstanding;
524 max_outstanding = nreqs; 905 max_outstanding = nreqs;
525 906
526void 907void
527aio_open(pathname,flags,mode,callback=&PL_sv_undef) 908aio_open (pathname,flags,mode,callback=&PL_sv_undef)
528 SV * pathname 909 SV * pathname
529 int flags 910 int flags
530 int mode 911 int mode
531 SV * callback 912 SV * callback
532 PROTOTYPE: $$$;$ 913 PROTOTYPE: $$$;$
533 CODE: 914 PPCODE:
534{ 915{
535 dREQ; 916 dREQ;
536 917
537 req->type = REQ_OPEN; 918 req->type = REQ_OPEN;
538 req->data = newSVsv (pathname); 919 req->data = newSVsv (pathname);
539 req->dataptr = SvPVbyte_nolen (req->data); 920 req->dataptr = SvPVbyte_nolen (req->data);
540 req->fd = flags; 921 req->fd = flags;
541 req->mode = mode; 922 req->mode = mode;
542 923
543 send_req (req); 924 REQ_SEND;
544} 925}
545 926
546void 927void
547aio_close(fh,callback=&PL_sv_undef) 928aio_close (fh,callback=&PL_sv_undef)
548 SV * fh 929 SV * fh
549 SV * callback 930 SV * callback
550 PROTOTYPE: $;$ 931 PROTOTYPE: $;$
551 ALIAS: 932 ALIAS:
552 aio_close = REQ_CLOSE 933 aio_close = REQ_CLOSE
553 aio_fsync = REQ_FSYNC 934 aio_fsync = REQ_FSYNC
554 aio_fdatasync = REQ_FDATASYNC 935 aio_fdatasync = REQ_FDATASYNC
555 CODE: 936 PPCODE:
556{ 937{
557 dREQ; 938 dREQ;
558 939
559 req->type = ix; 940 req->type = ix;
560 req->fh = newSVsv (fh); 941 req->fh = newSVsv (fh);
561 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 942 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
562 943
563 send_req (req); 944 REQ_SEND (req);
564} 945}
565 946
566void 947void
567aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 948aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
568 SV * fh 949 SV * fh
569 UV offset 950 UV offset
570 IV length 951 UV length
571 SV * data 952 SV * data
572 IV dataoffset 953 UV dataoffset
573 SV * callback 954 SV * callback
574 ALIAS: 955 ALIAS:
575 aio_read = REQ_READ 956 aio_read = REQ_READ
576 aio_write = REQ_WRITE 957 aio_write = REQ_WRITE
577 PROTOTYPE: $$$$$;$ 958 PROTOTYPE: $$$$$;$
578 CODE: 959 PPCODE:
579{ 960{
580 aio_req req; 961 aio_req req;
581 STRLEN svlen; 962 STRLEN svlen;
582 char *svptr = SvPVbyte (data, svlen); 963 char *svptr = SvPVbyte (data, svlen);
583 964
… …
614 : IoOFP (sv_2io (fh))); 995 : IoOFP (sv_2io (fh)));
615 req->offset = offset; 996 req->offset = offset;
616 req->length = length; 997 req->length = length;
617 req->data = SvREFCNT_inc (data); 998 req->data = SvREFCNT_inc (data);
618 req->dataptr = (char *)svptr + dataoffset; 999 req->dataptr = (char *)svptr + dataoffset;
619 req->callback = SvREFCNT_inc (callback);
620 1000
621 send_req (req); 1001 if (!SvREADONLY (data))
1002 {
1003 SvREADONLY_on (data);
1004 req->data2ptr = (void *)data;
1005 }
1006
1007 REQ_SEND;
622 } 1008 }
623} 1009}
624 1010
625void 1011void
1012aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1013 SV * out_fh
1014 SV * in_fh
1015 UV in_offset
1016 UV length
1017 SV * callback
1018 PROTOTYPE: $$$$;$
1019 PPCODE:
1020{
1021 dREQ;
1022
1023 req->type = REQ_SENDFILE;
1024 req->fh = newSVsv (out_fh);
1025 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1026 req->fh2 = newSVsv (in_fh);
1027 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1028 req->offset = in_offset;
1029 req->length = length;
1030
1031 REQ_SEND;
1032}
1033
1034void
626aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1035aio_readahead (fh,offset,length,callback=&PL_sv_undef)
627 SV * fh 1036 SV * fh
628 UV offset 1037 UV offset
629 IV length 1038 IV length
630 SV * callback 1039 SV * callback
631 PROTOTYPE: $$$;$ 1040 PROTOTYPE: $$$;$
632 CODE: 1041 PPCODE:
633{ 1042{
634 dREQ; 1043 dREQ;
635 1044
636 req->type = REQ_READAHEAD; 1045 req->type = REQ_READAHEAD;
637 req->fh = newSVsv (fh); 1046 req->fh = newSVsv (fh);
638 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1047 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
639 req->offset = offset; 1048 req->offset = offset;
640 req->length = length; 1049 req->length = length;
641 1050
642 send_req (req); 1051 REQ_SEND;
643} 1052}
644 1053
645void 1054void
646aio_stat(fh_or_path,callback=&PL_sv_undef) 1055aio_stat (fh_or_path,callback=&PL_sv_undef)
647 SV * fh_or_path 1056 SV * fh_or_path
648 SV * callback 1057 SV * callback
649 ALIAS: 1058 ALIAS:
650 aio_stat = REQ_STAT 1059 aio_stat = REQ_STAT
651 aio_lstat = REQ_LSTAT 1060 aio_lstat = REQ_LSTAT
652 CODE: 1061 PPCODE:
653{ 1062{
654 dREQ; 1063 dREQ;
655 1064
656 New (0, req->statdata, 1, Stat_t); 1065 New (0, req->statdata, 1, Stat_t);
657 if (!req->statdata) 1066 if (!req->statdata)
1067 {
1068 req_free (req);
658 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 }
659 1071
660 if (SvPOK (fh_or_path)) 1072 if (SvPOK (fh_or_path))
661 { 1073 {
662 req->type = ix; 1074 req->type = ix;
663 req->data = newSVsv (fh_or_path); 1075 req->data = newSVsv (fh_or_path);
… …
668 req->type = REQ_FSTAT; 1080 req->type = REQ_FSTAT;
669 req->fh = newSVsv (fh_or_path); 1081 req->fh = newSVsv (fh_or_path);
670 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1082 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
671 } 1083 }
672 1084
673 send_req (req); 1085 REQ_SEND;
674} 1086}
675 1087
676void 1088void
677aio_unlink(pathname,callback=&PL_sv_undef) 1089aio_unlink (pathname,callback=&PL_sv_undef)
678 SV * pathname 1090 SV * pathname
679 SV * callback 1091 SV * callback
680 ALIAS: 1092 ALIAS:
681 aio_unlink = REQ_UNLINK 1093 aio_unlink = REQ_UNLINK
682 aio_rmdir = REQ_RMDIR 1094 aio_rmdir = REQ_RMDIR
1095 aio_readdir = REQ_READDIR
683 CODE: 1096 PPCODE:
684{ 1097{
685 dREQ; 1098 dREQ;
686 1099
687 req->type = ix; 1100 req->type = ix;
688 req->data = newSVsv (pathname); 1101 req->data = newSVsv (pathname);
689 req->dataptr = SvPVbyte_nolen (req->data); 1102 req->dataptr = SvPVbyte_nolen (req->data);
690 1103
691 send_req (req); 1104 REQ_SEND;
692} 1105}
693 1106
694void 1107void
695aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1108aio_link (oldpath,newpath,callback=&PL_sv_undef)
696 SV * oldpath 1109 SV * oldpath
697 SV * newpath 1110 SV * newpath
698 SV * callback 1111 SV * callback
1112 ALIAS:
1113 aio_link = REQ_LINK
1114 aio_symlink = REQ_SYMLINK
1115 aio_rename = REQ_RENAME
699 CODE: 1116 PPCODE:
700{ 1117{
701 dREQ; 1118 dREQ;
702 1119
703 req->type = REQ_SYMLINK; 1120 req->type = ix;
704 req->fh = newSVsv (oldpath); 1121 req->fh = newSVsv (oldpath);
705 req->data2ptr = SvPVbyte_nolen (req->fh); 1122 req->data2ptr = SvPVbyte_nolen (req->fh);
706 req->data = newSVsv (newpath); 1123 req->data = newSVsv (newpath);
707 req->dataptr = SvPVbyte_nolen (req->data); 1124 req->dataptr = SvPVbyte_nolen (req->data);
708 1125
709 send_req (req); 1126 REQ_SEND;
710} 1127}
711 1128
712void 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
713flush() 1160flush ()
714 PROTOTYPE: 1161 PROTOTYPE:
715 CODE: 1162 CODE:
716 while (nreqs) 1163 while (nreqs)
717 { 1164 {
718 poll_wait (); 1165 poll_wait ();
… …
758 CODE: 1205 CODE:
759 RETVAL = nreqs; 1206 RETVAL = nreqs;
760 OUTPUT: 1207 OUTPUT:
761 RETVAL 1208 RETVAL
762 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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