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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.6 by root, Mon Jul 11 01:03:17 2005 UTC vs.
Revision 1.40 by root, Sat Jun 24 16:27:02 2006 UTC

1#define _REENTRANT 1
2#include <errno.h>
3
1#include "EXTERN.h" 4#include "EXTERN.h"
2#include "perl.h" 5#include "perl.h"
3#include "XSUB.h" 6#include "XSUB.h"
4 7
8#include "autoconf/config.h"
9
10#include <pthread.h>
11
12#include <stddef.h>
5#include <sys/types.h> 13#include <sys/types.h>
6#include <sys/stat.h> 14#include <sys/stat.h>
15#include <limits.h>
7#include <unistd.h> 16#include <unistd.h>
8#include <fcntl.h> 17#include <fcntl.h>
9#include <signal.h> 18#include <signal.h>
10#include <sched.h> 19#include <sched.h>
11#include <endian.h>
12 20
13#include <pthread.h> 21#if HAVE_SENDFILE
22# if __linux
23# include <sys/sendfile.h>
24# elif __freebsd
14#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
33# endif
34#endif
15 35
16typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 36/* used for struct dirent, AIX doesn't provide it */
17typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 37#ifndef NAME_MAX
18typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 38# define NAME_MAX 4096
39#endif
19 40
20#if __ia64 41#if __ia64
21# define STACKSIZE 65536 42# define STACKSIZE 65536
22#else 43#else
23# define STACKSIZE 4096 44# define STACKSIZE 8192
24#endif 45#endif
25 46
26enum { 47enum {
27 REQ_QUIT, 48 REQ_QUIT,
28 REQ_OPEN, REQ_CLOSE, 49 REQ_OPEN, REQ_CLOSE,
29 REQ_READ, REQ_WRITE, REQ_READAHEAD, 50 REQ_READ, REQ_WRITE, REQ_READAHEAD,
51 REQ_SENDFILE,
30 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 52 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
31 REQ_FSYNC, REQ_FDATASYNC, 53 REQ_FSYNC, REQ_FDATASYNC,
54 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
55 REQ_READDIR,
56 REQ_LINK, REQ_SYMLINK,
32}; 57};
33 58
34typedef struct aio_cb { 59typedef struct aio_cb {
35 struct aio_cb *volatile next; 60 struct aio_cb *volatile next;
36 61
37 int type; 62 int type;
38 63
64 /* should receive a cleanup, with unions */
39 int fd; 65 int fd, fd2;
40 off_t offset; 66 off_t offset;
41 size_t length; 67 size_t length;
42 ssize_t result; 68 ssize_t result;
43 mode_t mode; /* open */ 69 mode_t mode; /* open */
44 int errorno; 70 int errorno;
45 SV *data, *callback; 71 SV *data, *callback;
46 void *dataptr; 72 SV *fh, *fh2;
73 void *dataptr, *data2ptr;
47 STRLEN dataoffset; 74 STRLEN dataoffset;
48 75
49 Stat_t *statdata; 76 Stat_t *statdata;
50} aio_cb; 77} aio_cb;
51 78
52typedef aio_cb *aio_req; 79typedef aio_cb *aio_req;
53 80
54static int started; 81static int started, wanted;
55static int nreqs; 82static volatile int nreqs;
56static int max_outstanding = 1<<30; 83static int max_outstanding = 1<<30;
57static int respipe [2]; 84static int respipe [2];
58 85
59static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 86static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
60static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 87static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
61static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 88static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62 89
63static volatile aio_req reqs, reqe; /* queue start, queue end */ 90static volatile aio_req reqs, reqe; /* queue start, queue end */
64static volatile aio_req ress, rese; /* queue start, queue end */ 91static volatile aio_req ress, rese; /* queue start, queue end */
65 92
93static void free_req (aio_req req)
94{
95 if (req->data)
96 SvREFCNT_dec (req->data);
97
98 if (req->fh)
99 SvREFCNT_dec (req->fh);
100
101 if (req->fh2)
102 SvREFCNT_dec (req->fh2);
103
104 if (req->statdata)
105 Safefree (req->statdata);
106
107 if (req->callback)
108 SvREFCNT_dec (req->callback);
109
110 if (req->type == REQ_READDIR && req->result >= 0)
111 free (req->data2ptr);
112
113 Safefree (req);
114}
115
66static void 116static void
67poll_wait () 117poll_wait ()
68{ 118{
69 if (!nreqs) 119 if (nreqs && !ress)
70 return; 120 {
71
72 fd_set rfd; 121 fd_set rfd;
73 FD_ZERO(&rfd); 122 FD_ZERO(&rfd);
74 FD_SET(respipe [0], &rfd); 123 FD_SET(respipe [0], &rfd);
75 124
76 select (respipe [0] + 1, &rfd, 0, 0, 0); 125 select (respipe [0] + 1, &rfd, 0, 0, 0);
126 }
77} 127}
78 128
79static int 129static int
80poll_cb () 130poll_cb ()
81{ 131{
82 dSP; 132 dSP;
83 int count = 0; 133 int count = 0;
134 int do_croak = 0;
84 aio_req req; 135 aio_req req;
85
86 {
87 /* read and signals sent by the worker threads */
88 char buf [32];
89 while (read (respipe [0], buf, 32) > 0)
90 ;
91 }
92 136
93 for (;;) 137 for (;;)
94 { 138 {
95 pthread_mutex_lock (&reslock); 139 pthread_mutex_lock (&reslock);
96
97 req = ress; 140 req = ress;
98 141
99 if (ress) 142 if (req)
100 { 143 {
101 ress = ress->next; 144 ress = req->next;
145
102 if (!ress) rese = 0; 146 if (!ress)
147 {
148 /* read any signals sent by the worker threads */
149 char buf [32];
150 while (read (respipe [0], buf, 32) == 32)
151 ;
152
153 rese = 0;
154 }
103 } 155 }
104 156
105 pthread_mutex_unlock (&reslock); 157 pthread_mutex_unlock (&reslock);
106 158
107 if (!req) 159 if (!req)
… …
115 { 167 {
116 int errorno = errno; 168 int errorno = errno;
117 errno = req->errorno; 169 errno = req->errorno;
118 170
119 if (req->type == REQ_READ) 171 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset 172 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121 + req->result > 0 ? req->result : 0);
122 173
174 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
175 SvREADONLY_off (req->data);
176
123 if (req->data) 177 if (req->statdata)
124 SvREFCNT_dec (req->data);
125
126 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127 { 178 {
128 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 179 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129 PL_laststatval = req->result; 180 PL_laststatval = req->result;
130 PL_statcache = *(req->statdata); 181 PL_statcache = *(req->statdata);
131
132 Safefree (req->statdata);
133 } 182 }
134 183
184 ENTER;
135 PUSHMARK (SP); 185 PUSHMARK (SP);
136 XPUSHs (sv_2mortal (newSViv (req->result)));
137 186
138 if (req->type == REQ_OPEN) 187 if (req->type == REQ_READDIR)
139 { 188 {
189 SV *rv = &PL_sv_undef;
190
191 if (req->result >= 0)
192 {
193 char *buf = req->data2ptr;
194 AV *av = newAV ();
195
196 while (req->result)
197 {
198 SV *sv = newSVpv (buf, 0);
199
200 av_push (av, sv);
201 buf += SvCUR (sv) + 1;
202 req->result--;
203 }
204
205 rv = sv_2mortal (newRV_noinc ((SV *)av));
206 }
207
208 XPUSHs (rv);
209 }
210 else
211 {
212 XPUSHs (sv_2mortal (newSViv (req->result)));
213
214 if (req->type == REQ_OPEN)
215 {
140 /* convert fd to fh */ 216 /* convert fd to fh */
141 SV *fh; 217 SV *fh;
142 218
219 PUTBACK;
220 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221 SPAGAIN;
222
223 fh = SvREFCNT_inc (POPs);
224
225 PUSHMARK (SP);
226 XPUSHs (sv_2mortal (fh));
227 }
228 }
229
230 if (SvOK (req->callback))
231 {
143 PUTBACK; 232 PUTBACK;
144 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 233 call_sv (req->callback, G_VOID | G_EVAL);
145 SPAGAIN; 234 SPAGAIN;
146 235
147 fh = POPs; 236 if (SvTRUE (ERRSV))
148 237 {
149 PUSHMARK (SP); 238 free_req (req);
150 XPUSHs (fh); 239 croak (0);
240 }
151 } 241 }
152 242
153 PUTBACK;
154 call_sv (req->callback, G_VOID | G_EVAL);
155 SPAGAIN;
156 243 LEAVE;
157 if (req->callback)
158 SvREFCNT_dec (req->callback);
159 244
160 errno = errorno; 245 errno = errorno;
161 count++; 246 count++;
162 } 247 }
163 248
164 Safefree (req); 249 free_req (req);
165 } 250 }
166 251
167 return count; 252 return count;
168} 253}
169 254
… …
190} 275}
191 276
192static void 277static void
193send_req (aio_req req) 278send_req (aio_req req)
194{ 279{
280 while (started < wanted && nreqs >= started)
281 start_thread ();
282
195 nreqs++; 283 nreqs++;
196 284
197 pthread_mutex_lock (&reqlock); 285 pthread_mutex_lock (&reqlock);
198 286
199 req->next = 0; 287 req->next = 0;
… …
207 reqe = reqs = req; 295 reqe = reqs = req;
208 296
209 pthread_cond_signal (&reqwait); 297 pthread_cond_signal (&reqwait);
210 pthread_mutex_unlock (&reqlock); 298 pthread_mutex_unlock (&reqlock);
211 299
212 while (nreqs > max_outstanding) 300 if (nreqs > max_outstanding)
301 for (;;)
302 {
303 poll_cb ();
304
305 if (nreqs <= max_outstanding)
306 break;
307
308 poll_wait ();
309 }
310}
311
312static void
313end_thread (void)
314{
315 aio_req req;
316 Newz (0, req, 1, aio_cb);
317 req->type = REQ_QUIT;
318
319 send_req (req);
320}
321
322static void min_parallel (int nthreads)
323{
324 if (wanted < nthreads)
325 wanted = nthreads;
326}
327
328static void max_parallel (int nthreads)
329{
330 int cur = started;
331
332 if (wanted > nthreads)
333 wanted = nthreads;
334
335 while (cur > wanted)
336 {
337 end_thread ();
338 cur--;
339 }
340
341 while (started > wanted)
213 { 342 {
214 poll_wait (); 343 poll_wait ();
215 poll_cb (); 344 poll_cb ();
216 } 345 }
217} 346}
218 347
219static void 348static void create_pipe ()
220end_thread (void)
221{ 349{
222 aio_req req; 350 if (pipe (respipe))
223 New (0, req, 1, aio_cb); 351 croak ("unable to initialize result pipe");
224 req->type = REQ_QUIT;
225 352
226 send_req (req); 353 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
227} 354 croak ("cannot set result pipe to nonblocking mode");
228 355
229static void 356 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
230read_write (int dowrite, int fd, off_t offset, size_t length, 357 croak ("cannot set result pipe to nonblocking mode");
231 SV *data, STRLEN dataoffset, SV *callback) 358}
232{
233 aio_req req;
234 STRLEN svlen;
235 char *svptr = SvPV (data, svlen);
236 359
237 SvUPGRADE (data, SVt_PV); 360/*****************************************************************************/
238 SvPOK_on (data); 361/* work around various missing functions */
239 362
240 if (dataoffset < 0) 363#if !HAVE_PREADWRITE
364# define pread aio_pread
365# define pwrite aio_pwrite
366
367/*
368 * make our pread/pwrite safe against themselves, but not against
369 * normal read/write by using a mutex. slows down execution a lot,
370 * but that's your problem, not mine.
371 */
372static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
373
374static ssize_t
375pread (int fd, void *buf, size_t count, off_t offset)
376{
377 ssize_t res;
378 off_t ooffset;
379
380 pthread_mutex_lock (&preadwritelock);
381 ooffset = lseek (fd, 0, SEEK_CUR);
382 lseek (fd, offset, SEEK_SET);
383 res = read (fd, buf, count);
384 lseek (fd, ooffset, SEEK_SET);
385 pthread_mutex_unlock (&preadwritelock);
386
387 return res;
388}
389
390static ssize_t
391pwrite (int fd, void *buf, size_t count, off_t offset)
392{
393 ssize_t res;
394 off_t ooffset;
395
396 pthread_mutex_lock (&preadwritelock);
397 ooffset = lseek (fd, 0, SEEK_CUR);
398 lseek (fd, offset, SEEK_SET);
399 res = write (fd, buf, count);
400 lseek (fd, offset, SEEK_SET);
401 pthread_mutex_unlock (&preadwritelock);
402
403 return res;
404}
405#endif
406
407#if !HAVE_FDATASYNC
408# define fdatasync fsync
409#endif
410
411#if !HAVE_READAHEAD
412# define readahead aio_readahead
413
414static ssize_t
415readahead (int fd, off_t offset, size_t count)
416{
417 char readahead_buf[4096];
418
419 while (count > 0)
420 {
421 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
422
423 pread (fd, readahead_buf, len, offset);
241 dataoffset += svlen; 424 offset += len;
242 425 count -= len;
243 if (dataoffset < 0 || dataoffset > svlen)
244 croak ("data offset outside of string");
245
246 if (dowrite)
247 { 426 }
248 /* write: check length and adjust. */ 427
249 if (length < 0 || length + dataoffset > svlen) 428 errno = 0;
250 length = svlen - dataoffset; 429}
430#endif
431
432#if !HAVE_READDIR_R
433# define readdir_r aio_readdir_r
434
435static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
436
437static int
438readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
439{
440 struct dirent *e;
441 int errorno;
442
443 pthread_mutex_lock (&readdirlock);
444
445 e = readdir (dirp);
446 errorno = errno;
447
448 if (e)
449 {
450 *res = ent;
451 strcpy (ent->d_name, e->d_name);
251 } 452 }
252 else 453 else
454 *res = 0;
455
456 pthread_mutex_unlock (&readdirlock);
457
458 errno = errorno;
459 return e ? 0 : -1;
460}
461#endif
462
463/* sendfile always needs emulation */
464static ssize_t
465sendfile_ (int ofd, int ifd, off_t offset, size_t count)
466{
467 ssize_t res;
468
469 if (!count)
470 return 0;
471
472#if HAVE_SENDFILE
473# if __linux
474 res = sendfile (ofd, ifd, &offset, count);
475
476# elif __freebsd
477 /*
478 * Of course, the freebsd sendfile is a dire hack with no thoughts
479 * wasted on making it similar to other I/O functions.
480 */
253 { 481 {
254 /* read: grow scalar as necessary */ 482 off_t sbytes;
255 svptr = SvGROW (data, length + dataoffset); 483 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
484
485 if (res < 0 && sbytes)
486 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
487 res = sbytes;
488 }
489
490# elif __hpux
491 res = sendfile (ofd, ifd, offset, count, 0, 0);
492
493# elif __solaris
494 {
495 struct sendfilevec vec;
496 size_t sbytes;
497
498 vec.sfv_fd = ifd;
499 vec.sfv_flag = 0;
500 vec.sfv_off = offset;
501 vec.sfv_len = count;
502
503 res = sendfilev (ofd, &vec, 1, &sbytes);
504
505 if (res < 0 && sbytes)
506 res = sbytes;
507 }
508
509# endif
510#else
511 res = -1;
512 errno = ENOSYS;
513#endif
514
515 if (res < 0
516 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
517#if __solaris
518 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
519#endif
520 )
521 )
256 } 522 {
523 /* emulate sendfile. this is a major pain in the ass */
524 char buf[4096];
525 res = 0;
257 526
258 if (length < 0) 527 while (count)
259 croak ("length must not be negative"); 528 {
529 ssize_t cnt;
530
531 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
260 532
261 Newz (0, req, 1, aio_cb); 533 if (cnt <= 0)
534 {
535 if (cnt && !res) res = -1;
536 break;
537 }
262 538
539 cnt = write (ofd, buf, cnt);
540
541 if (cnt <= 0)
542 {
543 if (cnt && !res) res = -1;
544 break;
545 }
546
547 offset += cnt;
548 res += cnt;
549 count -= cnt;
550 }
551 }
552
553 return res;
554}
555
556/* read a full directory */
557static int
558scandir_ (const char *path, void **namesp)
559{
560 DIR *dirp = opendir (path);
561 union
562 {
563 struct dirent d;
564 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
565 } u;
566 struct dirent *entp;
567 char *name, *names;
568 int memlen = 4096;
569 int memofs = 0;
570 int res = 0;
571 int errorno;
572
263 if (!req) 573 if (!dirp)
264 croak ("out of memory during aio_req allocation"); 574 return -1;
265 575
266 req->type = dowrite ? REQ_WRITE : REQ_READ; 576 names = malloc (memlen);
267 req->fd = fd;
268 req->offset = offset;
269 req->length = length;
270 req->data = SvREFCNT_inc (data);
271 req->dataptr = (char *)svptr + dataoffset;
272 req->callback = SvREFCNT_inc (callback);
273 577
274 send_req (req); 578 for (;;)
579 {
580 errno = 0, readdir_r (dirp, &u.d, &entp);
581
582 if (!entp)
583 break;
584
585 name = entp->d_name;
586
587 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588 {
589 int len = strlen (name) + 1;
590
591 res++;
592
593 while (memofs + len > memlen)
594 {
595 memlen *= 2;
596 names = realloc (names, memlen);
597 if (!names)
598 break;
599 }
600
601 memcpy (names + memofs, name, len);
602 memofs += len;
603 }
604 }
605
606 errorno = errno;
607 closedir (dirp);
608
609 if (errorno)
610 {
611 free (names);
612 errno = errorno;
613 res = -1;
614 }
615
616 *namesp = (void *)names;
617 return res;
275} 618}
619
620/*****************************************************************************/
276 621
277static void * 622static void *
278aio_proc (void *thr_arg) 623aio_proc (void *thr_arg)
279{ 624{
280 aio_req req; 625 aio_req req;
… …
306 651
307 type = req->type; 652 type = req->type;
308 653
309 switch (type) 654 switch (type)
310 { 655 {
311 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 656 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
312 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 657 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
313#if SYS_readahead 658
314 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 659 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
315#else 660 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
316 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
317#endif
318 661
319 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 662 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
320 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 663 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
321 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 664 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
322 665
323 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 666 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
324 case REQ_CLOSE: req->result = close (req->fd); break; 667 case REQ_CLOSE: req->result = close (req->fd); break;
325 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 668 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
669 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
670 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
671 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
672 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
326 673
674 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
327 case REQ_FSYNC: req->result = fsync (req->fd); break; 675 case REQ_FSYNC: req->result = fsync (req->fd); break;
328 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 676 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
329 677
330 case REQ_QUIT: 678 case REQ_QUIT:
331 break; 679 break;
332 680
333 default: 681 default:
… …
359 while (type != REQ_QUIT); 707 while (type != REQ_QUIT);
360 708
361 return 0; 709 return 0;
362} 710}
363 711
712/*****************************************************************************/
713
714static void atfork_prepare (void)
715{
716 pthread_mutex_lock (&reqlock);
717 pthread_mutex_lock (&reslock);
718#if !HAVE_PREADWRITE
719 pthread_mutex_lock (&preadwritelock);
720#endif
721#if !HAVE_READDIR_R
722 pthread_mutex_lock (&readdirlock);
723#endif
724}
725
726static void atfork_parent (void)
727{
728#if !HAVE_READDIR_R
729 pthread_mutex_unlock (&readdirlock);
730#endif
731#if !HAVE_PREADWRITE
732 pthread_mutex_unlock (&preadwritelock);
733#endif
734 pthread_mutex_unlock (&reslock);
735 pthread_mutex_unlock (&reqlock);
736}
737
738static void atfork_child (void)
739{
740 aio_req prv;
741
742 started = 0;
743
744 while (reqs)
745 {
746 prv = reqs;
747 reqs = prv->next;
748 free_req (prv);
749 }
750
751 reqs = reqe = 0;
752
753 while (ress)
754 {
755 prv = ress;
756 ress = prv->next;
757 free_req (prv);
758 }
759
760 ress = rese = 0;
761
762 close (respipe [0]);
763 close (respipe [1]);
764 create_pipe ();
765
766 atfork_parent ();
767}
768
769#define dREQ \
770 aio_req req; \
771 \
772 if (SvOK (callback) && !SvROK (callback)) \
773 croak ("clalback must be undef or of reference type"); \
774 \
775 Newz (0, req, 1, aio_cb); \
776 if (!req) \
777 croak ("out of memory during aio_req allocation"); \
778 \
779 req->callback = newSVsv (callback);
780
364MODULE = IO::AIO PACKAGE = IO::AIO 781MODULE = IO::AIO PACKAGE = IO::AIO
365 782
783PROTOTYPES: ENABLE
784
366BOOT: 785BOOT:
367{ 786{
368 if (pipe (respipe)) 787 create_pipe ();
369 croak ("unable to initialize result pipe"); 788 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
370
371 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
372 croak ("cannot set result pipe to nonblocking mode");
373
374 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
375 croak ("cannot set result pipe to nonblocking mode");
376} 789}
377 790
378void 791void
379min_parallel(nthreads) 792min_parallel (nthreads)
380 int nthreads 793 int nthreads
381 PROTOTYPE: $ 794 PROTOTYPE: $
382 CODE:
383 while (nthreads > started)
384 start_thread ();
385 795
386void 796void
387max_parallel(nthreads) 797max_parallel (nthreads)
388 int nthreads 798 int nthreads
389 PROTOTYPE: $ 799 PROTOTYPE: $
390 CODE:
391{
392 int cur = started;
393 while (cur > nthreads)
394 {
395 end_thread ();
396 cur--;
397 }
398
399 while (started > nthreads)
400 {
401 poll_wait ();
402 poll_cb ();
403 }
404}
405 800
406int 801int
407max_outstanding(nreqs) 802max_outstanding (nreqs)
408 int nreqs 803 int nreqs
409 PROTOTYPE: $ 804 PROTOTYPE: $
410 CODE: 805 CODE:
411 RETVAL = max_outstanding; 806 RETVAL = max_outstanding;
412 max_outstanding = nreqs; 807 max_outstanding = nreqs;
413 808
414void 809void
415aio_open(pathname,flags,mode,callback) 810aio_open (pathname,flags,mode,callback=&PL_sv_undef)
416 SV * pathname 811 SV * pathname
417 int flags 812 int flags
418 int mode 813 int mode
419 SV * callback 814 SV * callback
420 PROTOTYPE: $$$$ 815 PROTOTYPE: $$$;$
421 CODE: 816 CODE:
422{ 817{
423 aio_req req; 818 dREQ;
424
425 Newz (0, req, 1, aio_cb);
426
427 if (!req)
428 croak ("out of memory during aio_req allocation");
429 819
430 req->type = REQ_OPEN; 820 req->type = REQ_OPEN;
431 req->data = newSVsv (pathname); 821 req->data = newSVsv (pathname);
432 req->dataptr = SvPV_nolen (req->data); 822 req->dataptr = SvPVbyte_nolen (req->data);
433 req->fd = flags; 823 req->fd = flags;
434 req->mode = mode; 824 req->mode = mode;
435 req->callback = SvREFCNT_inc (callback);
436 825
437 send_req (req); 826 send_req (req);
438} 827}
439 828
440void 829void
441aio_close(fh,callback) 830aio_close (fh,callback=&PL_sv_undef)
442 InputStream fh 831 SV * fh
443 SV * callback 832 SV * callback
444 PROTOTYPE: $$ 833 PROTOTYPE: $;$
445 ALIAS: 834 ALIAS:
446 aio_close = REQ_CLOSE 835 aio_close = REQ_CLOSE
447 aio_fsync = REQ_FSYNC 836 aio_fsync = REQ_FSYNC
448 aio_fdatasync = REQ_FDATASYNC 837 aio_fdatasync = REQ_FDATASYNC
449 CODE: 838 CODE:
450{ 839{
840 dREQ;
841
842 req->type = ix;
843 req->fh = newSVsv (fh);
844 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
845
846 send_req (req);
847}
848
849void
850aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
851 SV * fh
852 UV offset
853 UV length
854 SV * data
855 UV dataoffset
856 SV * callback
857 ALIAS:
858 aio_read = REQ_READ
859 aio_write = REQ_WRITE
860 PROTOTYPE: $$$$$;$
861 CODE:
862{
451 aio_req req; 863 aio_req req;
864 STRLEN svlen;
865 char *svptr = SvPVbyte (data, svlen);
452 866
453 Newz (0, req, 1, aio_cb); 867 SvUPGRADE (data, SVt_PV);
868 SvPOK_on (data);
454 869
455 if (!req) 870 if (dataoffset < 0)
456 croak ("out of memory during aio_req allocation"); 871 dataoffset += svlen;
457 872
458 req->type = ix; 873 if (dataoffset < 0 || dataoffset > svlen)
459 req->fd = PerlIO_fileno (fh); 874 croak ("data offset outside of string");
460 req->callback = SvREFCNT_inc (callback);
461 875
462 send_req (req); 876 if (ix == REQ_WRITE)
463} 877 {
464 878 /* write: check length and adjust. */
465void 879 if (length < 0 || length + dataoffset > svlen)
466aio_read(fh,offset,length,data,dataoffset,callback) 880 length = svlen - dataoffset;
467 InputStream fh 881 }
468 UV offset 882 else
469 IV length 883 {
470 SV * data 884 /* read: grow scalar as necessary */
471 IV dataoffset 885 svptr = SvGROW (data, length + dataoffset);
472 SV * callback 886 }
473 PROTOTYPE: $$$$$$
474 CODE:
475 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
476
477void
478aio_write(fh,offset,length,data,dataoffset,callback)
479 OutputStream fh
480 UV offset
481 IV length
482 SV * data
483 IV dataoffset
484 SV * callback
485 PROTOTYPE: $$$$$$
486 CODE:
487 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
488
489void
490aio_readahead(fh,offset,length,callback)
491 InputStream fh
492 UV offset
493 IV length
494 SV * callback
495 PROTOTYPE: $$$$
496 CODE:
497{
498 aio_req req;
499 887
500 if (length < 0) 888 if (length < 0)
501 croak ("length must not be negative"); 889 croak ("length must not be negative");
502 890
503 Newz (0, req, 1, aio_cb); 891 {
892 dREQ;
504 893
505 if (!req) 894 req->type = ix;
506 croak ("out of memory during aio_req allocation"); 895 req->fh = newSVsv (fh);
896 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
897 : IoOFP (sv_2io (fh)));
898 req->offset = offset;
899 req->length = length;
900 req->data = SvREFCNT_inc (data);
901 req->dataptr = (char *)svptr + dataoffset;
902
903 if (!SvREADONLY (data))
904 {
905 SvREADONLY_on (data);
906 req->data2ptr = (void *)data;
907 }
908
909 send_req (req);
910 }
911}
912
913void
914aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
915 SV * out_fh
916 SV * in_fh
917 UV in_offset
918 UV length
919 SV * callback
920 PROTOTYPE: $$$$;$
921 CODE:
922{
923 dREQ;
924
925 req->type = REQ_SENDFILE;
926 req->fh = newSVsv (out_fh);
927 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
928 req->fh2 = newSVsv (in_fh);
929 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
930 req->offset = in_offset;
931 req->length = length;
932
933 send_req (req);
934}
935
936void
937aio_readahead (fh,offset,length,callback=&PL_sv_undef)
938 SV * fh
939 UV offset
940 IV length
941 SV * callback
942 PROTOTYPE: $$$;$
943 CODE:
944{
945 dREQ;
507 946
508 req->type = REQ_READAHEAD; 947 req->type = REQ_READAHEAD;
948 req->fh = newSVsv (fh);
509 req->fd = PerlIO_fileno (fh); 949 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
510 req->offset = offset; 950 req->offset = offset;
511 req->length = length; 951 req->length = length;
512 req->callback = SvREFCNT_inc (callback);
513 952
514 send_req (req); 953 send_req (req);
515} 954}
516 955
517void 956void
518aio_stat(fh_or_path,callback) 957aio_stat (fh_or_path,callback=&PL_sv_undef)
519 SV * fh_or_path 958 SV * fh_or_path
520 SV * callback 959 SV * callback
521 PROTOTYPE: $$
522 ALIAS: 960 ALIAS:
961 aio_stat = REQ_STAT
523 aio_lstat = 1 962 aio_lstat = REQ_LSTAT
524 CODE: 963 CODE:
525{ 964{
526 aio_req req; 965 dREQ;
527
528 Newz (0, req, 1, aio_cb);
529
530 if (!req)
531 croak ("out of memory during aio_req allocation");
532 966
533 New (0, req->statdata, 1, Stat_t); 967 New (0, req->statdata, 1, Stat_t);
534
535 if (!req->statdata) 968 if (!req->statdata)
969 {
970 free_req (req);
536 croak ("out of memory during aio_req->statdata allocation"); 971 croak ("out of memory during aio_req->statdata allocation");
972 }
537 973
538 if (SvPOK (fh_or_path)) 974 if (SvPOK (fh_or_path))
539 { 975 {
540 req->type = ix ? REQ_LSTAT : REQ_STAT; 976 req->type = ix;
541 req->data = newSVsv (fh_or_path); 977 req->data = newSVsv (fh_or_path);
542 req->dataptr = SvPV_nolen (req->data); 978 req->dataptr = SvPVbyte_nolen (req->data);
543 } 979 }
544 else 980 else
545 { 981 {
546 req->type = REQ_FSTAT; 982 req->type = REQ_FSTAT;
983 req->fh = newSVsv (fh_or_path);
547 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 984 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548 } 985 }
549 986
550 req->callback = SvREFCNT_inc (callback);
551
552 send_req (req); 987 send_req (req);
553} 988}
554 989
555void 990void
556aio_unlink(pathname,callback) 991aio_unlink (pathname,callback=&PL_sv_undef)
557 SV * pathname 992 SV * pathname
558 SV * callback 993 SV * callback
559 PROTOTYPE: $$ 994 ALIAS:
995 aio_unlink = REQ_UNLINK
996 aio_rmdir = REQ_RMDIR
997 aio_readdir = REQ_READDIR
560 CODE: 998 CODE:
561{ 999{
562 aio_req req; 1000 dREQ;
563 1001
564 Newz (0, req, 1, aio_cb); 1002 req->type = ix;
565
566 if (!req)
567 croak ("out of memory during aio_req allocation");
568
569 req->type = REQ_UNLINK;
570 req->data = newSVsv (pathname); 1003 req->data = newSVsv (pathname);
571 req->dataptr = SvPV_nolen (req->data); 1004 req->dataptr = SvPVbyte_nolen (req->data);
572 req->callback = SvREFCNT_inc (callback);
573 1005
574 send_req (req); 1006 send_req (req);
575} 1007}
576 1008
577void 1009void
1010aio_link (oldpath,newpath,callback=&PL_sv_undef)
1011 SV * oldpath
1012 SV * newpath
1013 SV * callback
1014 ALIAS:
1015 aio_link = REQ_LINK
1016 aio_symlink = REQ_SYMLINK
1017 aio_rename = REQ_RENAME
1018 CODE:
1019{
1020 dREQ;
1021
1022 req->type = ix;
1023 req->fh = newSVsv (oldpath);
1024 req->data2ptr = SvPVbyte_nolen (req->fh);
1025 req->data = newSVsv (newpath);
1026 req->dataptr = SvPVbyte_nolen (req->data);
1027
1028 send_req (req);
1029}
1030
1031void
578flush() 1032flush ()
579 PROTOTYPE: 1033 PROTOTYPE:
580 CODE: 1034 CODE:
581 while (nreqs) 1035 while (nreqs)
582 { 1036 {
583 poll_wait (); 1037 poll_wait ();
584 poll_cb (); 1038 poll_cb ();
585 } 1039 }
586 1040
1041void
1042poll()
1043 PROTOTYPE:
1044 CODE:
1045 if (nreqs)
1046 {
1047 poll_wait ();
1048 poll_cb ();
1049 }
1050
587int 1051int
588poll_fileno() 1052poll_fileno()
589 PROTOTYPE: 1053 PROTOTYPE:
590 CODE: 1054 CODE:
591 RETVAL = respipe [0]; 1055 RETVAL = respipe [0];

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