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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.22 by root, Tue Aug 16 22:22:18 2005 UTC vs.
Revision 1.42 by root, Fri Jul 21 07:35:31 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>
10#include <sys/types.h> 14#include <sys/types.h>
11#include <sys/stat.h> 15#include <sys/stat.h>
12 16#include <limits.h>
13#include <unistd.h> 17#include <unistd.h>
14#include <fcntl.h> 18#include <fcntl.h>
15#include <signal.h> 19#include <signal.h>
16#include <sched.h> 20#include <sched.h>
17 21
18#include <pthread.h> 22#if HAVE_SENDFILE
23# if __linux
24# include <sys/sendfile.h>
25# elif __freebsd
26# include <sys/socket.h>
27# include <sys/uio.h>
28# elif __hpux
29# include <sys/socket.h>
30# elif __solaris /* not yet */
31# include <sys/sendfile.h>
32# else
33# error sendfile support requested but not available
34# endif
35#endif
19 36
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 37/* used for struct dirent, AIX doesn't provide it */
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 38#ifndef NAME_MAX
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 39# define NAME_MAX 4096
40#endif
23 41
24#if __ia64 42#if __ia64
25# define STACKSIZE 65536 43# define STACKSIZE 65536
26#else 44#else
27# define STACKSIZE 4096 45# define STACKSIZE 8192
28#endif 46#endif
29 47
30enum { 48enum {
31 REQ_QUIT, 49 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 50 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 51 REQ_READ, REQ_WRITE, REQ_READAHEAD,
52 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, 53 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 54 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR, REQ_SYMLINK, 55 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37 REQ_SYMLINK, 56 REQ_READDIR,
57 REQ_LINK, REQ_SYMLINK,
38}; 58};
39 59
40typedef struct aio_cb { 60typedef struct aio_cb {
41 struct aio_cb *volatile next; 61 struct aio_cb *volatile next;
42 62
43 int type; 63 int type;
44 64
65 /* should receive a cleanup, with unions */
45 int fd; 66 int fd, fd2;
46 off_t offset; 67 off_t offset;
47 size_t length; 68 size_t length;
48 ssize_t result; 69 ssize_t result;
49 mode_t mode; /* open */ 70 mode_t mode; /* open */
50 int errorno; 71 int errorno;
51 SV *data, *callback, *fh; 72 SV *data, *callback;
73 SV *fh, *fh2;
52 void *dataptr, *data2ptr; 74 void *dataptr, *data2ptr;
53 STRLEN dataoffset; 75 STRLEN dataoffset;
54 76
55 Stat_t *statdata; 77 Stat_t *statdata;
56} aio_cb; 78} aio_cb;
57 79
58typedef aio_cb *aio_req; 80typedef aio_cb *aio_req;
59 81
60static int started; 82static int started, wanted;
61static volatile int nreqs; 83static volatile int nreqs;
62static int max_outstanding = 1<<30; 84static int max_outstanding = 1<<30;
63static int respipe [2]; 85static int respipe [2];
64 86
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 87static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 88static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 89static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69 90
70static volatile aio_req reqs, reqe; /* queue start, queue end */ 91static volatile aio_req reqs, reqe; /* queue start, queue end */
71static volatile aio_req ress, rese; /* queue start, queue end */ 92static volatile aio_req ress, rese; /* queue start, queue end */
93
94static void free_req (aio_req req)
95{
96 if (req->data)
97 SvREFCNT_dec (req->data);
98
99 if (req->fh)
100 SvREFCNT_dec (req->fh);
101
102 if (req->fh2)
103 SvREFCNT_dec (req->fh2);
104
105 if (req->statdata)
106 Safefree (req->statdata);
107
108 if (req->callback)
109 SvREFCNT_dec (req->callback);
110
111 if (req->type == REQ_READDIR && req->result >= 0)
112 free (req->data2ptr);
113
114 Safefree (req);
115}
72 116
73static void 117static void
74poll_wait () 118poll_wait ()
75{ 119{
76 if (nreqs && !ress) 120 if (nreqs && !ress)
… …
86static int 130static int
87poll_cb () 131poll_cb ()
88{ 132{
89 dSP; 133 dSP;
90 int count = 0; 134 int count = 0;
135 int do_croak = 0;
91 aio_req req, prv; 136 aio_req req;
92 137
138 for (;;)
139 {
93 pthread_mutex_lock (&reslock); 140 pthread_mutex_lock (&reslock);
141 req = ress;
94 142
95 { 143 if (req)
144 {
145 ress = req->next;
146
147 if (!ress)
148 {
96 /* read any signals sent by the worker threads */ 149 /* read any signals sent by the worker threads */
97 char buf [32]; 150 char buf [32];
98 while (read (respipe [0], buf, 32) == 32) 151 while (read (respipe [0], buf, 32) == 32)
152 ;
153
154 rese = 0;
155 }
99 ; 156 }
100 }
101 157
102 req = ress;
103 ress = rese = 0;
104
105 pthread_mutex_unlock (&reslock); 158 pthread_mutex_unlock (&reslock);
106 159
107 while (req) 160 if (!req)
108 { 161 break;
162
109 nreqs--; 163 nreqs--;
110 164
111 if (req->type == REQ_QUIT) 165 if (req->type == REQ_QUIT)
112 started--; 166 started--;
113 else 167 else
114 { 168 {
115 int errorno = errno; 169 int errorno = errno;
116 errno = req->errorno; 170 errno = req->errorno;
117 171
118 if (req->type == REQ_READ) 172 if (req->type == REQ_READ)
119 SvCUR_set (req->data, req->dataoffset 173 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
120 + req->result > 0 ? req->result : 0);
121 174
175 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176 SvREADONLY_off (req->data);
177
122 if (req->data) 178 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 { 179 {
130 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 180 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131 PL_laststatval = req->result; 181 PL_laststatval = req->result;
132 PL_statcache = *(req->statdata); 182 PL_statcache = *(req->statdata);
133
134 Safefree (req->statdata);
135 } 183 }
136 184
137 ENTER; 185 ENTER;
138 PUSHMARK (SP); 186 PUSHMARK (SP);
139 XPUSHs (sv_2mortal (newSViv (req->result)));
140 187
141 if (req->type == REQ_OPEN) 188 if (req->type == REQ_READDIR)
142 { 189 {
190 SV *rv = &PL_sv_undef;
191
192 if (req->result >= 0)
193 {
194 char *buf = req->data2ptr;
195 AV *av = newAV ();
196
197 while (req->result)
198 {
199 SV *sv = newSVpv (buf, 0);
200
201 av_push (av, sv);
202 buf += SvCUR (sv) + 1;
203 req->result--;
204 }
205
206 rv = sv_2mortal (newRV_noinc ((SV *)av));
207 }
208
209 XPUSHs (rv);
210 }
211 else
212 {
213 XPUSHs (sv_2mortal (newSViv (req->result)));
214
215 if (req->type == REQ_OPEN)
216 {
143 /* convert fd to fh */ 217 /* convert fd to fh */
144 SV *fh; 218 SV *fh;
145 219
146 PUTBACK; 220 PUTBACK;
147 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 221 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
148 SPAGAIN; 222 SPAGAIN;
149 223
150 fh = SvREFCNT_inc (POPs); 224 fh = SvREFCNT_inc (POPs);
151 225
152 PUSHMARK (SP); 226 PUSHMARK (SP);
153 XPUSHs (sv_2mortal (fh)); 227 XPUSHs (sv_2mortal (fh));
228 }
154 } 229 }
155 230
156 if (SvOK (req->callback)) 231 if (SvOK (req->callback))
157 { 232 {
158 PUTBACK; 233 PUTBACK;
159 call_sv (req->callback, G_VOID | G_EVAL); 234 call_sv (req->callback, G_VOID | G_EVAL);
160 SPAGAIN; 235 SPAGAIN;
236
237 if (SvTRUE (ERRSV))
238 {
239 free_req (req);
240 croak (0);
241 }
161 } 242 }
162 243
163 LEAVE; 244 LEAVE;
164
165 if (req->callback)
166 SvREFCNT_dec (req->callback);
167 245
168 errno = errorno; 246 errno = errorno;
169 count++; 247 count++;
170 } 248 }
171 249
172 prv = req; 250 free_req (req);
173 req = req->next;
174 Safefree (prv);
175
176 /* TODO: croak on errors? */
177 } 251 }
178 252
179 return count; 253 return count;
180} 254}
181 255
… …
202} 276}
203 277
204static void 278static void
205send_req (aio_req req) 279send_req (aio_req req)
206{ 280{
281 while (started < wanted && nreqs >= started)
282 start_thread ();
283
207 nreqs++; 284 nreqs++;
208 285
209 pthread_mutex_lock (&reqlock); 286 pthread_mutex_lock (&reqlock);
210 287
211 req->next = 0; 288 req->next = 0;
… …
219 reqe = reqs = req; 296 reqe = reqs = req;
220 297
221 pthread_cond_signal (&reqwait); 298 pthread_cond_signal (&reqwait);
222 pthread_mutex_unlock (&reqlock); 299 pthread_mutex_unlock (&reqlock);
223 300
224 while (nreqs > max_outstanding) 301 if (nreqs > max_outstanding)
302 for (;;)
303 {
304 poll_cb ();
305
306 if (nreqs <= max_outstanding)
307 break;
308
309 poll_wait ();
310 }
311}
312
313static void
314end_thread (void)
315{
316 aio_req req;
317 Newz (0, req, 1, aio_cb);
318 req->type = REQ_QUIT;
319
320 send_req (req);
321}
322
323static void min_parallel (int nthreads)
324{
325 if (wanted < nthreads)
326 wanted = nthreads;
327}
328
329static void max_parallel (int nthreads)
330{
331 int cur = started;
332
333 if (wanted > nthreads)
334 wanted = nthreads;
335
336 while (cur > wanted)
337 {
338 end_thread ();
339 cur--;
340 }
341
342 while (started > wanted)
225 { 343 {
226 poll_wait (); 344 poll_wait ();
227 poll_cb (); 345 poll_cb ();
228 } 346 }
229} 347}
230 348
231static void 349static void create_pipe ()
232end_thread (void)
233{ 350{
234 aio_req req; 351 if (pipe (respipe))
235 New (0, req, 1, aio_cb); 352 croak ("unable to initialize result pipe");
236 req->type = REQ_QUIT;
237 353
238 send_req (req); 354 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
239} 355 croak ("cannot set result pipe to nonblocking mode");
240 356
241 357 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
242static void min_parallel (int nthreads) 358 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} 359}
313 360
314/*****************************************************************************/ 361/*****************************************************************************/
315/* work around various missing functions */ 362/* work around various missing functions */
316 363
… …
321/* 368/*
322 * make our pread/pwrite safe against themselves, but not against 369 * make our pread/pwrite safe against themselves, but not against
323 * normal read/write by using a mutex. slows down execution a lot, 370 * normal read/write by using a mutex. slows down execution a lot,
324 * but that's your problem, not mine. 371 * but that's your problem, not mine.
325 */ 372 */
326static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 373static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
327 374
328static ssize_t 375static ssize_t
329pread (int fd, void *buf, size_t count, off_t offset) 376pread (int fd, void *buf, size_t count, off_t offset)
330{ 377{
331 ssize_t res; 378 ssize_t res;
332 off_t ooffset; 379 off_t ooffset;
333 380
334 pthread_mutex_lock (&iolock); 381 pthread_mutex_lock (&preadwritelock);
335 ooffset = lseek (fd, 0, SEEK_CUR); 382 ooffset = lseek (fd, 0, SEEK_CUR);
336 lseek (fd, offset, SEEK_SET); 383 lseek (fd, offset, SEEK_SET);
337 res = read (fd, buf, count); 384 res = read (fd, buf, count);
338 lseek (fd, ooffset, SEEK_SET); 385 lseek (fd, ooffset, SEEK_SET);
339 pthread_mutex_unlock (&iolock); 386 pthread_mutex_unlock (&preadwritelock);
340 387
341 return res; 388 return res;
342} 389}
343 390
344static ssize_t 391static ssize_t
345pwrite (int fd, void *buf, size_t count, off_t offset) 392pwrite (int fd, void *buf, size_t count, off_t offset)
346{ 393{
347 ssize_t res; 394 ssize_t res;
348 off_t ooffset; 395 off_t ooffset;
349 396
350 pthread_mutex_lock (&iolock); 397 pthread_mutex_lock (&preadwritelock);
351 ooffset = lseek (fd, 0, SEEK_CUR); 398 ooffset = lseek (fd, 0, SEEK_CUR);
352 lseek (fd, offset, SEEK_SET); 399 lseek (fd, offset, SEEK_SET);
353 res = write (fd, buf, count); 400 res = write (fd, buf, count);
354 lseek (fd, offset, SEEK_SET); 401 lseek (fd, offset, SEEK_SET);
355 pthread_mutex_unlock (&iolock); 402 pthread_mutex_unlock (&preadwritelock);
356 403
357 return res; 404 return res;
358} 405}
359#endif 406#endif
360 407
… …
363#endif 410#endif
364 411
365#if !HAVE_READAHEAD 412#if !HAVE_READAHEAD
366# define readahead aio_readahead 413# define readahead aio_readahead
367 414
368static char readahead_buf[4096];
369
370static ssize_t 415static ssize_t
371readahead (int fd, off_t offset, size_t count) 416readahead (int fd, off_t offset, size_t count)
372{ 417{
418 char readahead_buf[4096];
419
373 while (count > 0) 420 while (count > 0)
374 { 421 {
375 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 422 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
376 423
377 pread (fd, readahead_buf, len, offset); 424 pread (fd, readahead_buf, len, offset);
… …
380 } 427 }
381 428
382 errno = 0; 429 errno = 0;
383} 430}
384#endif 431#endif
432
433#if !HAVE_READDIR_R
434# define readdir_r aio_readdir_r
435
436static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
437
438static int
439readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
440{
441 struct dirent *e;
442 int errorno;
443
444 pthread_mutex_lock (&readdirlock);
445
446 e = readdir (dirp);
447 errorno = errno;
448
449 if (e)
450 {
451 *res = ent;
452 strcpy (ent->d_name, e->d_name);
453 }
454 else
455 *res = 0;
456
457 pthread_mutex_unlock (&readdirlock);
458
459 errno = errorno;
460 return e ? 0 : -1;
461}
462#endif
463
464/* sendfile always needs emulation */
465static ssize_t
466sendfile_ (int ofd, int ifd, off_t offset, size_t count)
467{
468 ssize_t res;
469
470 if (!count)
471 return 0;
472
473#if HAVE_SENDFILE
474# if __linux
475 res = sendfile (ofd, ifd, &offset, count);
476
477# elif __freebsd
478 /*
479 * Of course, the freebsd sendfile is a dire hack with no thoughts
480 * wasted on making it similar to other I/O functions.
481 */
482 {
483 off_t sbytes;
484 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
485
486 if (res < 0 && sbytes)
487 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
488 res = sbytes;
489 }
490
491# elif __hpux
492 res = sendfile (ofd, ifd, offset, count, 0, 0);
493
494# elif __solaris
495 {
496 struct sendfilevec vec;
497 size_t sbytes;
498
499 vec.sfv_fd = ifd;
500 vec.sfv_flag = 0;
501 vec.sfv_off = offset;
502 vec.sfv_len = count;
503
504 res = sendfilev (ofd, &vec, 1, &sbytes);
505
506 if (res < 0 && sbytes)
507 res = sbytes;
508 }
509
510# endif
511#else
512 res = -1;
513 errno = ENOSYS;
514#endif
515
516 if (res < 0
517 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
518#if __solaris
519 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
520#endif
521 )
522 )
523 {
524 /* emulate sendfile. this is a major pain in the ass */
525 char buf[4096];
526 res = 0;
527
528 while (count)
529 {
530 ssize_t cnt;
531
532 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
533
534 if (cnt <= 0)
535 {
536 if (cnt && !res) res = -1;
537 break;
538 }
539
540 cnt = write (ofd, buf, cnt);
541
542 if (cnt <= 0)
543 {
544 if (cnt && !res) res = -1;
545 break;
546 }
547
548 offset += cnt;
549 res += cnt;
550 count -= cnt;
551 }
552 }
553
554 return res;
555}
556
557/* read a full directory */
558static int
559scandir_ (const char *path, void **namesp)
560{
561 DIR *dirp = opendir (path);
562 union
563 {
564 struct dirent d;
565 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
566 } u;
567 struct dirent *entp;
568 char *name, *names;
569 int memlen = 4096;
570 int memofs = 0;
571 int res = 0;
572 int errorno;
573
574 if (!dirp)
575 return -1;
576
577 names = malloc (memlen);
578
579 for (;;)
580 {
581 errno = 0, readdir_r (dirp, &u.d, &entp);
582
583 if (!entp)
584 break;
585
586 name = entp->d_name;
587
588 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
589 {
590 int len = strlen (name) + 1;
591
592 res++;
593
594 while (memofs + len > memlen)
595 {
596 memlen *= 2;
597 names = realloc (names, memlen);
598 if (!names)
599 break;
600 }
601
602 memcpy (names + memofs, name, len);
603 memofs += len;
604 }
605 }
606
607 errorno = errno;
608 closedir (dirp);
609
610 if (errorno)
611 {
612 free (names);
613 errno = errorno;
614 res = -1;
615 }
616
617 *namesp = (void *)names;
618 return res;
619}
385 620
386/*****************************************************************************/ 621/*****************************************************************************/
387 622
388static void * 623static void *
389aio_proc (void *thr_arg) 624aio_proc (void *thr_arg)
… …
421 { 656 {
422 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 657 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; 658 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
424 659
425 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 660 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
661 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
426 662
427 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 663 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
428 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 664 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
429 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 665 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430 666
431 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 667 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
432 case REQ_CLOSE: req->result = close (req->fd); break; 668 case REQ_CLOSE: req->result = close (req->fd); break;
433 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 669 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434 case REQ_RMDIR: req->result = rmdir (req->dataptr); break; 670 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
671 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
672 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
435 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 673 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
436 674
437 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 675 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438 case REQ_FSYNC: req->result = fsync (req->fd); break; 676 case REQ_FSYNC: req->result = fsync (req->fd); break;
677 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
439 678
440 case REQ_QUIT: 679 case REQ_QUIT:
441 break; 680 break;
442 681
443 default: 682 default:
… …
467 pthread_mutex_unlock (&reslock); 706 pthread_mutex_unlock (&reslock);
468 } 707 }
469 while (type != REQ_QUIT); 708 while (type != REQ_QUIT);
470 709
471 return 0; 710 return 0;
711}
712
713/*****************************************************************************/
714
715static void atfork_prepare (void)
716{
717 pthread_mutex_lock (&reqlock);
718 pthread_mutex_lock (&reslock);
719#if !HAVE_PREADWRITE
720 pthread_mutex_lock (&preadwritelock);
721#endif
722#if !HAVE_READDIR_R
723 pthread_mutex_lock (&readdirlock);
724#endif
725}
726
727static void atfork_parent (void)
728{
729#if !HAVE_READDIR_R
730 pthread_mutex_unlock (&readdirlock);
731#endif
732#if !HAVE_PREADWRITE
733 pthread_mutex_unlock (&preadwritelock);
734#endif
735 pthread_mutex_unlock (&reslock);
736 pthread_mutex_unlock (&reqlock);
737}
738
739static void atfork_child (void)
740{
741 aio_req prv;
742
743 started = 0;
744
745 while (reqs)
746 {
747 prv = reqs;
748 reqs = prv->next;
749 free_req (prv);
750 }
751
752 reqs = reqe = 0;
753
754 while (ress)
755 {
756 prv = ress;
757 ress = prv->next;
758 free_req (prv);
759 }
760
761 ress = rese = 0;
762
763 close (respipe [0]);
764 close (respipe [1]);
765 create_pipe ();
766
767 atfork_parent ();
472} 768}
473 769
474#define dREQ \ 770#define dREQ \
475 aio_req req; \ 771 aio_req req; \
476 \ 772 \
… …
479 \ 775 \
480 Newz (0, req, 1, aio_cb); \ 776 Newz (0, req, 1, aio_cb); \
481 if (!req) \ 777 if (!req) \
482 croak ("out of memory during aio_req allocation"); \ 778 croak ("out of memory during aio_req allocation"); \
483 \ 779 \
484 req->callback = SvREFCNT_inc (callback); 780 req->callback = newSVsv (callback);
485 781
486MODULE = IO::AIO PACKAGE = IO::AIO 782MODULE = IO::AIO PACKAGE = IO::AIO
487 783
488PROTOTYPES: ENABLE 784PROTOTYPES: ENABLE
489 785
490BOOT: 786BOOT:
491{ 787{
492 if (pipe (respipe)) 788 HV *stash = gv_stashpv ("IO::AIO", 1);
493 croak ("unable to initialize result pipe"); 789 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
790 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
791 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
494 792
495 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 793 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); 794 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
502} 795}
503 796
504void 797void
505min_parallel(nthreads) 798min_parallel (nthreads)
506 int nthreads 799 int nthreads
507 PROTOTYPE: $ 800 PROTOTYPE: $
508 801
509void 802void
510max_parallel(nthreads) 803max_parallel (nthreads)
511 int nthreads 804 int nthreads
512 PROTOTYPE: $ 805 PROTOTYPE: $
513 806
514int 807int
515max_outstanding(nreqs) 808max_outstanding (nreqs)
516 int nreqs 809 int nreqs
517 PROTOTYPE: $ 810 PROTOTYPE: $
518 CODE: 811 CODE:
519 RETVAL = max_outstanding; 812 RETVAL = max_outstanding;
520 max_outstanding = nreqs; 813 max_outstanding = nreqs;
521 814
522void 815void
523aio_open(pathname,flags,mode,callback=&PL_sv_undef) 816aio_open (pathname,flags,mode,callback=&PL_sv_undef)
524 SV * pathname 817 SV * pathname
525 int flags 818 int flags
526 int mode 819 int mode
527 SV * callback 820 SV * callback
528 PROTOTYPE: $$$;$ 821 PROTOTYPE: $$$;$
… …
538 831
539 send_req (req); 832 send_req (req);
540} 833}
541 834
542void 835void
543aio_close(fh,callback=&PL_sv_undef) 836aio_close (fh,callback=&PL_sv_undef)
544 SV * fh 837 SV * fh
545 SV * callback 838 SV * callback
546 PROTOTYPE: $;$ 839 PROTOTYPE: $;$
547 ALIAS: 840 ALIAS:
548 aio_close = REQ_CLOSE 841 aio_close = REQ_CLOSE
… …
558 851
559 send_req (req); 852 send_req (req);
560} 853}
561 854
562void 855void
563aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 856aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
564 SV * fh 857 SV * fh
565 UV offset 858 UV offset
566 IV length 859 UV length
567 SV * data 860 SV * data
568 IV dataoffset 861 UV dataoffset
569 SV * callback 862 SV * callback
570 ALIAS: 863 ALIAS:
571 aio_read = REQ_READ 864 aio_read = REQ_READ
572 aio_write = REQ_WRITE 865 aio_write = REQ_WRITE
573 PROTOTYPE: $$$$$;$ 866 PROTOTYPE: $$$$$;$
… …
610 : IoOFP (sv_2io (fh))); 903 : IoOFP (sv_2io (fh)));
611 req->offset = offset; 904 req->offset = offset;
612 req->length = length; 905 req->length = length;
613 req->data = SvREFCNT_inc (data); 906 req->data = SvREFCNT_inc (data);
614 req->dataptr = (char *)svptr + dataoffset; 907 req->dataptr = (char *)svptr + dataoffset;
615 req->callback = SvREFCNT_inc (callback); 908
909 if (!SvREADONLY (data))
910 {
911 SvREADONLY_on (data);
912 req->data2ptr = (void *)data;
913 }
616 914
617 send_req (req); 915 send_req (req);
618 } 916 }
619} 917}
620 918
621void 919void
920aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
921 SV * out_fh
922 SV * in_fh
923 UV in_offset
924 UV length
925 SV * callback
926 PROTOTYPE: $$$$;$
927 CODE:
928{
929 dREQ;
930
931 req->type = REQ_SENDFILE;
932 req->fh = newSVsv (out_fh);
933 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
934 req->fh2 = newSVsv (in_fh);
935 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936 req->offset = in_offset;
937 req->length = length;
938
939 send_req (req);
940}
941
942void
622aio_readahead(fh,offset,length,callback=&PL_sv_undef) 943aio_readahead (fh,offset,length,callback=&PL_sv_undef)
623 SV * fh 944 SV * fh
624 UV offset 945 UV offset
625 IV length 946 IV length
626 SV * callback 947 SV * callback
627 PROTOTYPE: $$$;$ 948 PROTOTYPE: $$$;$
… …
637 958
638 send_req (req); 959 send_req (req);
639} 960}
640 961
641void 962void
642aio_stat(fh_or_path,callback=&PL_sv_undef) 963aio_stat (fh_or_path,callback=&PL_sv_undef)
643 SV * fh_or_path 964 SV * fh_or_path
644 SV * callback 965 SV * callback
645 ALIAS: 966 ALIAS:
646 aio_stat = REQ_STAT 967 aio_stat = REQ_STAT
647 aio_lstat = REQ_LSTAT 968 aio_lstat = REQ_LSTAT
… …
649{ 970{
650 dREQ; 971 dREQ;
651 972
652 New (0, req->statdata, 1, Stat_t); 973 New (0, req->statdata, 1, Stat_t);
653 if (!req->statdata) 974 if (!req->statdata)
975 {
976 free_req (req);
654 croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)"); 977 croak ("out of memory during aio_req->statdata allocation");
978 }
655 979
656 if (SvPOK (fh_or_path)) 980 if (SvPOK (fh_or_path))
657 { 981 {
658 req->type = ix; 982 req->type = ix;
659 req->data = newSVsv (fh_or_path); 983 req->data = newSVsv (fh_or_path);
… …
668 992
669 send_req (req); 993 send_req (req);
670} 994}
671 995
672void 996void
673aio_unlink(pathname,callback=&PL_sv_undef) 997aio_unlink (pathname,callback=&PL_sv_undef)
674 SV * pathname 998 SV * pathname
675 SV * callback 999 SV * callback
676 ALIAS: 1000 ALIAS:
677 aio_unlink = REQ_UNLINK 1001 aio_unlink = REQ_UNLINK
678 aio_rmdir = REQ_RMDIR 1002 aio_rmdir = REQ_RMDIR
1003 aio_readdir = REQ_READDIR
679 CODE: 1004 CODE:
680{ 1005{
681 dREQ; 1006 dREQ;
682 1007
683 req->type = ix; 1008 req->type = ix;
… …
686 1011
687 send_req (req); 1012 send_req (req);
688} 1013}
689 1014
690void 1015void
691aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1016aio_link (oldpath,newpath,callback=&PL_sv_undef)
692 SV * oldpath 1017 SV * oldpath
693 SV * newpath 1018 SV * newpath
694 SV * callback 1019 SV * callback
1020 ALIAS:
1021 aio_link = REQ_LINK
1022 aio_symlink = REQ_SYMLINK
1023 aio_rename = REQ_RENAME
695 CODE: 1024 CODE:
696{ 1025{
697 dREQ; 1026 dREQ;
698 1027
699 req->type = REQ_SYMLINK; 1028 req->type = ix;
700 req->fh = newSVsv (oldpath); 1029 req->fh = newSVsv (oldpath);
701 req->data2ptr = SvPVbyte_nolen (req->fh); 1030 req->data2ptr = SvPVbyte_nolen (req->fh);
702 req->data = newSVsv (newpath); 1031 req->data = newSVsv (newpath);
703 req->dataptr = SvPVbyte_nolen (req->data); 1032 req->dataptr = SvPVbyte_nolen (req->data);
704 1033
705 send_req (req); 1034 send_req (req);
706} 1035}
707 1036
1037#if 0
1038
1039# undocumented, because it does not cancel active requests
708void 1040void
1041cancel_most_requests ()
1042 PROTOTYPE:
1043 CODE:
1044{
1045 aio_req *req;
1046
1047 pthread_mutex_lock (&reqlock);
1048 for (req = reqs; req; req = req->next)
1049 req->flags |= 1;
1050 pthread_mutex_unlock (&reqlock);
1051
1052 pthread_mutex_lock (&reslock);
1053 for (req = ress; req; req = req->next)
1054 req->flags |= 1;
1055 pthread_mutex_unlock (&reslock);
1056}
1057
1058#endif
1059
1060void
709flush() 1061flush ()
710 PROTOTYPE: 1062 PROTOTYPE:
711 CODE: 1063 CODE:
712 while (nreqs) 1064 while (nreqs)
713 { 1065 {
714 poll_wait (); 1066 poll_wait ();

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