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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.12 by root, Wed Jul 20 21:57:04 2005 UTC vs.
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC

1#define _XOPEN_SOURCE 500 1#define _REENTRANT 1
2#include <errno.h>
2 3
3#include "EXTERN.h" 4#include "EXTERN.h"
4#include "perl.h" 5#include "perl.h"
5#include "XSUB.h" 6#include "XSUB.h"
6 7
8#include "autoconf/config.h"
9
10#include <pthread.h>
11
12#include <stddef.h>
7#include <sys/types.h> 13#include <sys/types.h>
8#include <sys/stat.h> 14#include <sys/stat.h>
9 15#include <limits.h>
10#include <unistd.h> 16#include <unistd.h>
11#include <fcntl.h> 17#include <fcntl.h>
12#include <signal.h> 18#include <signal.h>
13#include <sched.h> 19#include <sched.h>
20
21#if HAVE_SENDFILE
14#if __linux 22# if __linux
23# include <sys/sendfile.h>
24# elif __freebsd
15#include <sys/syscall.h> 25# include <sys/socket.h>
26# include <sys/uio.h>
27# elif __hpux
28# include <sys/socket.h>
29# elif __solaris /* not yet */
30# include <sys/sendfile.h>
31# else
32# error sendfile support requested but not available
16#endif 33# endif
17 34#endif
18#include <pthread.h>
19
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23 35
24#if __ia64 36#if __ia64
25# define STACKSIZE 65536 37# define STACKSIZE 65536
26#else 38#else
27# define STACKSIZE 4096 39# define STACKSIZE 8192
28#endif 40#endif
29 41
30enum { 42enum {
31 REQ_QUIT, 43 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 44 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 45 REQ_READ, REQ_WRITE, REQ_READAHEAD,
46 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 47 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 48 REQ_FSYNC, REQ_FDATASYNC,
49 REQ_UNLINK, REQ_RMDIR,
50 REQ_READDIR,
51 REQ_SYMLINK,
36}; 52};
37 53
38typedef struct aio_cb { 54typedef struct aio_cb {
39 struct aio_cb *volatile next; 55 struct aio_cb *volatile next;
40 56
41 int type; 57 int type;
42 58
59 /* should receive a cleanup, with unions */
43 int fd; 60 int fd, fd2;
44 off_t offset; 61 off_t offset;
45 size_t length; 62 size_t length;
46 ssize_t result; 63 ssize_t result;
47 mode_t mode; /* open */ 64 mode_t mode; /* open */
48 int errorno; 65 int errorno;
49 SV *data, *callback; 66 SV *data, *callback;
50 void *dataptr; 67 SV *fh, *fh2;
68 void *dataptr, *data2ptr;
51 STRLEN dataoffset; 69 STRLEN dataoffset;
52 70
53 Stat_t *statdata; 71 Stat_t *statdata;
54} aio_cb; 72} aio_cb;
55 73
56typedef aio_cb *aio_req; 74typedef aio_cb *aio_req;
57 75
58static int started; 76static int started, wanted;
59static volatile int nreqs; 77static volatile int nreqs;
60static int max_outstanding = 1<<30; 78static int max_outstanding = 1<<30;
61static int respipe [2]; 79static int respipe [2];
62 80
63static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 81static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
… …
65static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 83static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66 84
67static volatile aio_req reqs, reqe; /* queue start, queue end */ 85static volatile aio_req reqs, reqe; /* queue start, queue end */
68static volatile aio_req ress, rese; /* queue start, queue end */ 86static volatile aio_req ress, rese; /* queue start, queue end */
69 87
88static void free_req (aio_req req)
89{
90 if (req->data)
91 SvREFCNT_dec (req->data);
92
93 if (req->fh)
94 SvREFCNT_dec (req->fh);
95
96 if (req->fh2)
97 SvREFCNT_dec (req->fh2);
98
99 if (req->statdata)
100 Safefree (req->statdata);
101
102 if (req->callback)
103 SvREFCNT_dec (req->callback);
104
105 if (req->type == REQ_READDIR && req->result >= 0)
106 free (req->data2ptr);
107
108 Safefree (req);
109}
110
70static void 111static void
71poll_wait () 112poll_wait ()
72{ 113{
73 if (nreqs && !ress) 114 if (nreqs && !ress)
74 { 115 {
… …
83static int 124static int
84poll_cb () 125poll_cb ()
85{ 126{
86 dSP; 127 dSP;
87 int count = 0; 128 int count = 0;
129 int do_croak = 0;
88 aio_req req, prv; 130 aio_req req;
89 131
132 for (;;)
133 {
90 pthread_mutex_lock (&reslock); 134 pthread_mutex_lock (&reslock);
135 req = ress;
91 136
92 { 137 if (req)
138 {
139 ress = req->next;
140
141 if (!ress)
142 {
93 /* read any signals sent by the worker threads */ 143 /* read any signals sent by the worker threads */
94 char buf [32]; 144 char buf [32];
95 while (read (respipe [0], buf, 32) > 0) 145 while (read (respipe [0], buf, 32) == 32)
146 ;
147
148 rese = 0;
149 }
96 ; 150 }
97 }
98 151
99 req = ress;
100 ress = rese = 0;
101
102 pthread_mutex_unlock (&reslock); 152 pthread_mutex_unlock (&reslock);
103 153
104 while (req) 154 if (!req)
105 { 155 break;
156
106 nreqs--; 157 nreqs--;
107 158
108 if (req->type == REQ_QUIT) 159 if (req->type == REQ_QUIT)
109 started--; 160 started--;
110 else 161 else
111 { 162 {
112 int errorno = errno; 163 int errorno = errno;
113 errno = req->errorno; 164 errno = req->errorno;
114 165
115 if (req->type == REQ_READ) 166 if (req->type == REQ_READ)
116 SvCUR_set (req->data, req->dataoffset 167 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
117 + req->result > 0 ? req->result : 0);
118 168
169 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170 SvREADONLY_off (req->data);
171
119 if (req->data) 172 if (req->statdata)
120 SvREFCNT_dec (req->data);
121
122 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
123 { 173 {
124 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 174 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
125 PL_laststatval = req->result; 175 PL_laststatval = req->result;
126 PL_statcache = *(req->statdata); 176 PL_statcache = *(req->statdata);
127
128 Safefree (req->statdata);
129 } 177 }
130 178
179 ENTER;
131 PUSHMARK (SP); 180 PUSHMARK (SP);
132 XPUSHs (sv_2mortal (newSViv (req->result)));
133 181
134 if (req->type == REQ_OPEN) 182 if (req->type == REQ_READDIR)
135 { 183 {
184 SV *rv = &PL_sv_undef;
185
186 if (req->result >= 0)
187 {
188 char *buf = req->data2ptr;
189 AV *av = newAV ();
190
191 while (req->result)
192 {
193 SV *sv = newSVpv (buf, 0);
194
195 av_push (av, sv);
196 buf += SvCUR (sv) + 1;
197 req->result--;
198 }
199
200 rv = sv_2mortal (newRV_noinc ((SV *)av));
201 }
202
203 XPUSHs (rv);
204 }
205 else
206 {
207 XPUSHs (sv_2mortal (newSViv (req->result)));
208
209 if (req->type == REQ_OPEN)
210 {
136 /* convert fd to fh */ 211 /* convert fd to fh */
137 SV *fh; 212 SV *fh;
138 213
139 PUTBACK; 214 PUTBACK;
140 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 215 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
141 SPAGAIN; 216 SPAGAIN;
142 217
143 fh = POPs; 218 fh = SvREFCNT_inc (POPs);
144 219
145 PUSHMARK (SP); 220 PUSHMARK (SP);
146 XPUSHs (fh); 221 XPUSHs (sv_2mortal (fh));
222 }
147 } 223 }
148 224
149 if (SvOK (req->callback)) 225 if (SvOK (req->callback))
150 { 226 {
151 PUTBACK; 227 PUTBACK;
152 call_sv (req->callback, G_VOID | G_EVAL); 228 call_sv (req->callback, G_VOID | G_EVAL);
153 SPAGAIN; 229 SPAGAIN;
230
231 if (SvTRUE (ERRSV))
232 {
233 free_req (req);
234 croak (0);
235 }
154 } 236 }
237
155 238 LEAVE;
156 if (req->callback)
157 SvREFCNT_dec (req->callback);
158 239
159 errno = errorno; 240 errno = errorno;
160 count++; 241 count++;
161 } 242 }
162 243
163 prv = req; 244 free_req (req);
164 req = req->next;
165 Safefree (prv);
166
167 /* TODO: croak on errors? */
168 } 245 }
169 246
170 return count; 247 return count;
171} 248}
172 249
… …
193} 270}
194 271
195static void 272static void
196send_req (aio_req req) 273send_req (aio_req req)
197{ 274{
275 while (started < wanted && nreqs >= started)
276 start_thread ();
277
198 nreqs++; 278 nreqs++;
199 279
200 pthread_mutex_lock (&reqlock); 280 pthread_mutex_lock (&reqlock);
201 281
202 req->next = 0; 282 req->next = 0;
… …
210 reqe = reqs = req; 290 reqe = reqs = req;
211 291
212 pthread_cond_signal (&reqwait); 292 pthread_cond_signal (&reqwait);
213 pthread_mutex_unlock (&reqlock); 293 pthread_mutex_unlock (&reqlock);
214 294
215 while (nreqs > max_outstanding) 295 if (nreqs > max_outstanding)
296 for (;;)
297 {
298 poll_cb ();
299
300 if (nreqs <= max_outstanding)
301 break;
302
303 poll_wait ();
304 }
305}
306
307static void
308end_thread (void)
309{
310 aio_req req;
311 Newz (0, req, 1, aio_cb);
312 req->type = REQ_QUIT;
313
314 send_req (req);
315}
316
317static void min_parallel (int nthreads)
318{
319 if (wanted < nthreads)
320 wanted = nthreads;
321}
322
323static void max_parallel (int nthreads)
324{
325 int cur = started;
326
327 if (wanted > nthreads)
328 wanted = nthreads;
329
330 while (cur > wanted)
331 {
332 end_thread ();
333 cur--;
334 }
335
336 while (started > wanted)
216 { 337 {
217 poll_wait (); 338 poll_wait ();
218 poll_cb (); 339 poll_cb ();
219 } 340 }
220} 341}
221 342
222static void 343static void create_pipe ()
223end_thread (void)
224{ 344{
225 aio_req req; 345 if (pipe (respipe))
226 New (0, req, 1, aio_cb); 346 croak ("unable to initialize result pipe");
227 req->type = REQ_QUIT;
228 347
229 send_req (req); 348 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
230} 349 croak ("cannot set result pipe to nonblocking mode");
231 350
232static void 351 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
233read_write (int dowrite, int fd, off_t offset, size_t length, 352 croak ("cannot set result pipe to nonblocking mode");
234 SV *data, STRLEN dataoffset, SV *callback) 353}
235{
236 aio_req req;
237 STRLEN svlen;
238 char *svptr = SvPV (data, svlen);
239 354
240 SvUPGRADE (data, SVt_PV); 355/*****************************************************************************/
241 SvPOK_on (data); 356/* work around various missing functions */
242 357
243 if (dataoffset < 0) 358#if !HAVE_PREADWRITE
359# define pread aio_pread
360# define pwrite aio_pwrite
361
362/*
363 * make our pread/pwrite safe against themselves, but not against
364 * normal read/write by using a mutex. slows down execution a lot,
365 * but that's your problem, not mine.
366 */
367static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368
369static ssize_t
370pread (int fd, void *buf, size_t count, off_t offset)
371{
372 ssize_t res;
373 off_t ooffset;
374
375 pthread_mutex_lock (&preadwritelock);
376 ooffset = lseek (fd, 0, SEEK_CUR);
377 lseek (fd, offset, SEEK_SET);
378 res = read (fd, buf, count);
379 lseek (fd, ooffset, SEEK_SET);
380 pthread_mutex_unlock (&preadwritelock);
381
382 return res;
383}
384
385static ssize_t
386pwrite (int fd, void *buf, size_t count, off_t offset)
387{
388 ssize_t res;
389 off_t ooffset;
390
391 pthread_mutex_lock (&preadwritelock);
392 ooffset = lseek (fd, 0, SEEK_CUR);
393 lseek (fd, offset, SEEK_SET);
394 res = write (fd, buf, count);
395 lseek (fd, offset, SEEK_SET);
396 pthread_mutex_unlock (&preadwritelock);
397
398 return res;
399}
400#endif
401
402#if !HAVE_FDATASYNC
403# define fdatasync fsync
404#endif
405
406#if !HAVE_READAHEAD
407# define readahead aio_readahead
408
409static ssize_t
410readahead (int fd, off_t offset, size_t count)
411{
412 char readahead_buf[4096];
413
414 while (count > 0)
415 {
416 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
417
418 pread (fd, readahead_buf, len, offset);
244 dataoffset += svlen; 419 offset += len;
245 420 count -= len;
246 if (dataoffset < 0 || dataoffset > svlen)
247 croak ("data offset outside of string");
248
249 if (dowrite)
250 { 421 }
251 /* write: check length and adjust. */ 422
252 if (length < 0 || length + dataoffset > svlen) 423 errno = 0;
253 length = svlen - dataoffset; 424}
425#endif
426
427#if !HAVE_READDIR_R
428# define readdir_r aio_readdir_r
429
430static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431
432static int
433readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434{
435 struct dirent *e;
436 int errorno;
437
438 pthread_mutex_lock (&readdirlock);
439
440 e = readdir (dirp);
441 errorno = errno;
442
443 if (e)
444 {
445 *res = ent;
446 strcpy (ent->d_name, e->d_name);
254 } 447 }
255 else 448 else
449 *res = 0;
450
451 pthread_mutex_unlock (&readdirlock);
452
453 errno = errorno;
454 return e ? 0 : -1;
455}
456#endif
457
458/* sendfile always needs emulation */
459static ssize_t
460sendfile_ (int ofd, int ifd, off_t offset, size_t count)
461{
462 ssize_t res;
463
464 if (!count)
465 return 0;
466
467#if HAVE_SENDFILE
468# if __linux
469 res = sendfile (ofd, ifd, &offset, count);
470
471# elif __freebsd
472 /*
473 * Of course, the freebsd sendfile is a dire hack with no thoughts
474 * wasted on making it similar to other I/O functions.
475 */
256 { 476 {
257 /* read: grow scalar as necessary */ 477 off_t sbytes;
258 svptr = SvGROW (data, length + dataoffset); 478 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479
480 if (res < 0 && sbytes)
481 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
482 res = sbytes;
483 }
484
485# elif __hpux
486 res = sendfile (ofd, ifd, offset, count, 0, 0);
487
488# elif __solaris
489 {
490 struct sendfilevec vec;
491 size_t sbytes;
492
493 vec.sfv_fd = ifd;
494 vec.sfv_flag = 0;
495 vec.sfv_off = offset;
496 vec.sfv_len = count;
497
498 res = sendfilev (ofd, &vec, 1, &sbytes);
499
500 if (res < 0 && sbytes)
501 res = sbytes;
502 }
503
504# endif
505#else
506 res = -1;
507 errno = ENOSYS;
508#endif
509
510 if (res < 0
511 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
512#if __solaris
513 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
514#endif
515 )
516 )
259 } 517 {
518 /* emulate sendfile. this is a major pain in the ass */
519 char buf[4096];
520 res = 0;
260 521
261 if (length < 0) 522 while (count)
262 croak ("length must not be negative"); 523 {
524 ssize_t cnt;
525
526 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
263 527
264 Newz (0, req, 1, aio_cb); 528 if (cnt <= 0)
529 {
530 if (cnt && !res) res = -1;
531 break;
532 }
265 533
534 cnt = write (ofd, buf, cnt);
535
536 if (cnt <= 0)
537 {
538 if (cnt && !res) res = -1;
539 break;
540 }
541
542 offset += cnt;
543 res += cnt;
544 count -= cnt;
545 }
546 }
547
548 return res;
549}
550
551/* read a full directory */
552static int
553scandir_ (const char *path, void **namesp)
554{
555 DIR *dirp = opendir (path);
556 union
557 {
558 struct dirent d;
559 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
560 } u;
561 struct dirent *entp;
562 char *name, *names;
563 int memlen = 4096;
564 int memofs = 0;
565 int res = 0;
566 int errorno;
567
266 if (!req) 568 if (!dirp)
267 croak ("out of memory during aio_req allocation"); 569 return -1;
268 570
269 req->type = dowrite ? REQ_WRITE : REQ_READ; 571 names = malloc (memlen);
270 req->fd = fd;
271 req->offset = offset;
272 req->length = length;
273 req->data = SvREFCNT_inc (data);
274 req->dataptr = (char *)svptr + dataoffset;
275 req->callback = SvREFCNT_inc (callback);
276 572
277 send_req (req); 573 for (;;)
574 {
575 errno = 0, readdir_r (dirp, &u.d, &entp);
576
577 if (!entp)
578 break;
579
580 name = entp->d_name;
581
582 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
583 {
584 int len = strlen (name) + 1;
585
586 res++;
587
588 while (memofs + len > memlen)
589 {
590 memlen *= 2;
591 names = realloc (names, memlen);
592 if (!names)
593 break;
594 }
595
596 memcpy (names + memofs, name, len);
597 memofs += len;
598 }
599 }
600
601 errorno = errno;
602 closedir (dirp);
603
604 if (errorno)
605 {
606 free (names);
607 errno = errorno;
608 res = -1;
609 }
610
611 *namesp = (void *)names;
612 return res;
278} 613}
614
615/*****************************************************************************/
279 616
280static void * 617static void *
281aio_proc (void *thr_arg) 618aio_proc (void *thr_arg)
282{ 619{
283 aio_req req; 620 aio_req req;
… …
311 648
312 switch (type) 649 switch (type)
313 { 650 {
314 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 651 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
315 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 652 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
316#if SYS_readahead 653
317 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 654 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
318#else 655 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
319 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
320#endif
321 656
322 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 657 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
323 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 658 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
324 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 659 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
325 660
326 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 661 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
327 case REQ_CLOSE: req->result = close (req->fd); break; 662 case REQ_CLOSE: req->result = close (req->fd); break;
328 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 663 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
664 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
665 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
329 666
667 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
330 case REQ_FSYNC: req->result = fsync (req->fd); break; 668 case REQ_FSYNC: req->result = fsync (req->fd); break;
331 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 669 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
332 670
333 case REQ_QUIT: 671 case REQ_QUIT:
334 break; 672 break;
335 673
336 default: 674 default:
… …
362 while (type != REQ_QUIT); 700 while (type != REQ_QUIT);
363 701
364 return 0; 702 return 0;
365} 703}
366 704
705/*****************************************************************************/
706
707static void atfork_prepare (void)
708{
709 pthread_mutex_lock (&reqlock);
710 pthread_mutex_lock (&reslock);
711#if !HAVE_PREADWRITE
712 pthread_mutex_lock (&preadwritelock);
713#endif
714#if !HAVE_READDIR_R
715 pthread_mutex_lock (&readdirlock);
716#endif
717}
718
719static void atfork_parent (void)
720{
721#if !HAVE_READDIR_R
722 pthread_mutex_unlock (&readdirlock);
723#endif
724#if !HAVE_PREADWRITE
725 pthread_mutex_unlock (&preadwritelock);
726#endif
727 pthread_mutex_unlock (&reslock);
728 pthread_mutex_unlock (&reqlock);
729}
730
731static void atfork_child (void)
732{
733 aio_req prv;
734
735 started = 0;
736
737 while (reqs)
738 {
739 prv = reqs;
740 reqs = prv->next;
741 free_req (prv);
742 }
743
744 reqs = reqe = 0;
745
746 while (ress)
747 {
748 prv = ress;
749 ress = prv->next;
750 free_req (prv);
751 }
752
753 ress = rese = 0;
754
755 close (respipe [0]);
756 close (respipe [1]);
757 create_pipe ();
758
759 atfork_parent ();
760}
761
762#define dREQ \
763 aio_req req; \
764 \
765 if (SvOK (callback) && !SvROK (callback)) \
766 croak ("clalback must be undef or of reference type"); \
767 \
768 Newz (0, req, 1, aio_cb); \
769 if (!req) \
770 croak ("out of memory during aio_req allocation"); \
771 \
772 req->callback = newSVsv (callback);
773
367MODULE = IO::AIO PACKAGE = IO::AIO 774MODULE = IO::AIO PACKAGE = IO::AIO
368 775
369PROTOTYPES: ENABLE 776PROTOTYPES: ENABLE
370 777
371BOOT: 778BOOT:
372{ 779{
373 if (pipe (respipe)) 780 create_pipe ();
374 croak ("unable to initialize result pipe"); 781 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
375
376 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
377 croak ("cannot set result pipe to nonblocking mode");
378
379 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
380 croak ("cannot set result pipe to nonblocking mode");
381} 782}
382 783
383void 784void
384min_parallel(nthreads) 785min_parallel(nthreads)
385 int nthreads 786 int nthreads
386 PROTOTYPE: $ 787 PROTOTYPE: $
387 CODE:
388 while (nthreads > started)
389 start_thread ();
390 788
391void 789void
392max_parallel(nthreads) 790max_parallel(nthreads)
393 int nthreads 791 int nthreads
394 PROTOTYPE: $ 792 PROTOTYPE: $
395 CODE:
396{
397 int cur = started;
398 while (cur > nthreads)
399 {
400 end_thread ();
401 cur--;
402 }
403
404 while (started > nthreads)
405 {
406 poll_wait ();
407 poll_cb ();
408 }
409}
410 793
411int 794int
412max_outstanding(nreqs) 795max_outstanding(nreqs)
413 int nreqs 796 int nreqs
414 PROTOTYPE: $ 797 PROTOTYPE: $
… …
423 int mode 806 int mode
424 SV * callback 807 SV * callback
425 PROTOTYPE: $$$;$ 808 PROTOTYPE: $$$;$
426 CODE: 809 CODE:
427{ 810{
428 aio_req req; 811 dREQ;
429
430 Newz (0, req, 1, aio_cb);
431
432 if (!req)
433 croak ("out of memory during aio_req allocation");
434 812
435 req->type = REQ_OPEN; 813 req->type = REQ_OPEN;
436 req->data = newSVsv (pathname); 814 req->data = newSVsv (pathname);
437 req->dataptr = SvPV_nolen (req->data); 815 req->dataptr = SvPVbyte_nolen (req->data);
438 req->fd = flags; 816 req->fd = flags;
439 req->mode = mode; 817 req->mode = mode;
440 req->callback = SvREFCNT_inc (callback);
441 818
442 send_req (req); 819 send_req (req);
443} 820}
444 821
445void 822void
446aio_close(fh,callback=&PL_sv_undef) 823aio_close(fh,callback=&PL_sv_undef)
447 InputStream fh 824 SV * fh
448 SV * callback 825 SV * callback
449 PROTOTYPE: $;$ 826 PROTOTYPE: $;$
450 ALIAS: 827 ALIAS:
451 aio_close = REQ_CLOSE 828 aio_close = REQ_CLOSE
452 aio_fsync = REQ_FSYNC 829 aio_fsync = REQ_FSYNC
453 aio_fdatasync = REQ_FDATASYNC 830 aio_fdatasync = REQ_FDATASYNC
454 CODE: 831 CODE:
455{ 832{
456 aio_req req; 833 dREQ;
457
458 Newz (0, req, 1, aio_cb);
459
460 if (!req)
461 croak ("out of memory during aio_req allocation");
462 834
463 req->type = ix; 835 req->type = ix;
836 req->fh = newSVsv (fh);
464 req->fd = PerlIO_fileno (fh); 837 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
465 req->callback = SvREFCNT_inc (callback);
466 838
467 send_req (req); 839 send_req (req);
468} 840}
469 841
470void 842void
471aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 843aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
472 InputStream fh 844 SV * fh
473 UV offset 845 UV offset
474 IV length 846 UV length
475 SV * data 847 SV * data
476 IV dataoffset 848 UV dataoffset
477 SV * callback 849 SV * callback
850 ALIAS:
851 aio_read = REQ_READ
852 aio_write = REQ_WRITE
478 PROTOTYPE: $$$$$;$ 853 PROTOTYPE: $$$$$;$
479 CODE: 854 CODE:
480 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); 855{
856 aio_req req;
857 STRLEN svlen;
858 char *svptr = SvPVbyte (data, svlen);
481 859
860 SvUPGRADE (data, SVt_PV);
861 SvPOK_on (data);
862
863 if (dataoffset < 0)
864 dataoffset += svlen;
865
866 if (dataoffset < 0 || dataoffset > svlen)
867 croak ("data offset outside of string");
868
869 if (ix == REQ_WRITE)
870 {
871 /* write: check length and adjust. */
872 if (length < 0 || length + dataoffset > svlen)
873 length = svlen - dataoffset;
874 }
875 else
876 {
877 /* read: grow scalar as necessary */
878 svptr = SvGROW (data, length + dataoffset);
879 }
880
881 if (length < 0)
882 croak ("length must not be negative");
883
884 {
885 dREQ;
886
887 req->type = ix;
888 req->fh = newSVsv (fh);
889 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
890 : IoOFP (sv_2io (fh)));
891 req->offset = offset;
892 req->length = length;
893 req->data = SvREFCNT_inc (data);
894 req->dataptr = (char *)svptr + dataoffset;
895
896 if (!SvREADONLY (data))
897 {
898 SvREADONLY_on (data);
899 req->data2ptr = (void *)data;
900 }
901
902 send_req (req);
903 }
904}
905
482void 906void
483aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 907aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
484 OutputStream fh 908 SV * out_fh
909 SV * in_fh
485 UV offset 910 UV in_offset
486 IV length 911 UV length
487 SV * data
488 IV dataoffset
489 SV * callback 912 SV * callback
490 PROTOTYPE: $$$$$;$ 913 PROTOTYPE: $$$$;$
491 CODE: 914 CODE:
492 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); 915{
916 dREQ;
917
918 req->type = REQ_SENDFILE;
919 req->fh = newSVsv (out_fh);
920 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
921 req->fh2 = newSVsv (in_fh);
922 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
923 req->offset = in_offset;
924 req->length = length;
925
926 send_req (req);
927}
493 928
494void 929void
495aio_readahead(fh,offset,length,callback=&PL_sv_undef) 930aio_readahead(fh,offset,length,callback=&PL_sv_undef)
496 InputStream fh 931 SV * fh
497 UV offset 932 UV offset
498 IV length 933 IV length
499 SV * callback 934 SV * callback
500 PROTOTYPE: $$$;$ 935 PROTOTYPE: $$$;$
501 CODE: 936 CODE:
502{ 937{
503 aio_req req; 938 dREQ;
504
505 if (length < 0)
506 croak ("length must not be negative");
507
508 Newz (0, req, 1, aio_cb);
509
510 if (!req)
511 croak ("out of memory during aio_req allocation");
512 939
513 req->type = REQ_READAHEAD; 940 req->type = REQ_READAHEAD;
941 req->fh = newSVsv (fh);
514 req->fd = PerlIO_fileno (fh); 942 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
515 req->offset = offset; 943 req->offset = offset;
516 req->length = length; 944 req->length = length;
517 req->callback = SvREFCNT_inc (callback);
518 945
519 send_req (req); 946 send_req (req);
520} 947}
521 948
522void 949void
… …
526 ALIAS: 953 ALIAS:
527 aio_stat = REQ_STAT 954 aio_stat = REQ_STAT
528 aio_lstat = REQ_LSTAT 955 aio_lstat = REQ_LSTAT
529 CODE: 956 CODE:
530{ 957{
531 aio_req req; 958 dREQ;
532
533 Newz (0, req, 1, aio_cb);
534
535 if (!req)
536 croak ("out of memory during aio_req allocation");
537 959
538 New (0, req->statdata, 1, Stat_t); 960 New (0, req->statdata, 1, Stat_t);
539
540 if (!req->statdata) 961 if (!req->statdata)
962 {
963 free_req (req);
541 croak ("out of memory during aio_req->statdata allocation"); 964 croak ("out of memory during aio_req->statdata allocation");
965 }
542 966
543 if (SvPOK (fh_or_path)) 967 if (SvPOK (fh_or_path))
544 { 968 {
545 req->type = ix; 969 req->type = ix;
546 req->data = newSVsv (fh_or_path); 970 req->data = newSVsv (fh_or_path);
547 req->dataptr = SvPV_nolen (req->data); 971 req->dataptr = SvPVbyte_nolen (req->data);
548 } 972 }
549 else 973 else
550 { 974 {
551 req->type = REQ_FSTAT; 975 req->type = REQ_FSTAT;
976 req->fh = newSVsv (fh_or_path);
552 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 977 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
553 } 978 }
554
555 req->callback = SvREFCNT_inc (callback);
556 979
557 send_req (req); 980 send_req (req);
558} 981}
559 982
560void 983void
561aio_unlink(pathname,callback=&PL_sv_undef) 984aio_unlink(pathname,callback=&PL_sv_undef)
562 SV * pathname 985 SV * pathname
563 SV * callback 986 SV * callback
987 ALIAS:
988 aio_unlink = REQ_UNLINK
989 aio_rmdir = REQ_RMDIR
564 CODE: 990 CODE:
565{ 991{
566 aio_req req; 992 dREQ;
567 993
568 Newz (0, req, 1, aio_cb); 994 req->type = ix;
995 req->data = newSVsv (pathname);
996 req->dataptr = SvPVbyte_nolen (req->data);
569 997
570 if (!req) 998 send_req (req);
571 croak ("out of memory during aio_req allocation"); 999}
1000
1001void
1002aio_symlink(oldpath,newpath,callback=&PL_sv_undef)
1003 SV * oldpath
1004 SV * newpath
1005 SV * callback
1006 CODE:
1007{
1008 dREQ;
572 1009
573 req->type = REQ_UNLINK; 1010 req->type = REQ_SYMLINK;
1011 req->fh = newSVsv (oldpath);
1012 req->data2ptr = SvPVbyte_nolen (req->fh);
1013 req->data = newSVsv (newpath);
1014 req->dataptr = SvPVbyte_nolen (req->data);
1015
1016 send_req (req);
1017}
1018
1019void
1020aio_readdir(pathname,callback=&PL_sv_undef)
1021 SV * pathname
1022 SV * callback
1023 CODE:
1024{
1025 dREQ;
1026
1027 req->type = REQ_READDIR;
574 req->data = newSVsv (pathname); 1028 req->data = newSVsv (pathname);
575 req->dataptr = SvPV_nolen (req->data); 1029 req->dataptr = SvPVbyte_nolen (req->data);
576 req->callback = SvREFCNT_inc (callback);
577 1030
578 send_req (req); 1031 send_req (req);
579} 1032}
580 1033
581void 1034void

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