ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/IO-AIO/AIO.xs
(Generate patch)

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.9 by root, Tue Jul 12 11:02:54 2005 UTC vs.
Revision 1.41 by root, Sat Jun 24 19:14:04 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>
13#include <errno.h>
5#include <sys/types.h> 14#include <sys/types.h>
6#include <sys/stat.h> 15#include <sys/stat.h>
16#include <limits.h>
7#include <unistd.h> 17#include <unistd.h>
8#include <fcntl.h> 18#include <fcntl.h>
9#include <signal.h> 19#include <signal.h>
10#include <sched.h> 20#include <sched.h>
11 21
12#include <pthread.h> 22#if HAVE_SENDFILE
23# if __linux
24# include <sys/sendfile.h>
25# elif __freebsd
13#include <sys/syscall.h> 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
14 36
15typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 37/* used for struct dirent, AIX doesn't provide it */
16typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 38#ifndef NAME_MAX
17typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 39# define NAME_MAX 4096
40#endif
18 41
19#if __ia64 42#if __ia64
20# define STACKSIZE 65536 43# define STACKSIZE 65536
21#else 44#else
22# define STACKSIZE 4096 45# define STACKSIZE 8192
23#endif 46#endif
24 47
25enum { 48enum {
26 REQ_QUIT, 49 REQ_QUIT,
27 REQ_OPEN, REQ_CLOSE, 50 REQ_OPEN, REQ_CLOSE,
28 REQ_READ, REQ_WRITE, REQ_READAHEAD, 51 REQ_READ, REQ_WRITE, REQ_READAHEAD,
52 REQ_SENDFILE,
29 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 53 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
30 REQ_FSYNC, REQ_FDATASYNC, 54 REQ_FSYNC, REQ_FDATASYNC,
55 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56 REQ_READDIR,
57 REQ_LINK, REQ_SYMLINK,
31}; 58};
32 59
33typedef struct aio_cb { 60typedef struct aio_cb {
34 struct aio_cb *volatile next; 61 struct aio_cb *volatile next;
35 62
36 int type; 63 int type;
37 64
65 /* should receive a cleanup, with unions */
38 int fd; 66 int fd, fd2;
39 off_t offset; 67 off_t offset;
40 size_t length; 68 size_t length;
41 ssize_t result; 69 ssize_t result;
42 mode_t mode; /* open */ 70 mode_t mode; /* open */
43 int errorno; 71 int errorno;
44 SV *data, *callback; 72 SV *data, *callback;
45 void *dataptr; 73 SV *fh, *fh2;
74 void *dataptr, *data2ptr;
46 STRLEN dataoffset; 75 STRLEN dataoffset;
47 76
48 Stat_t *statdata; 77 Stat_t *statdata;
49} aio_cb; 78} aio_cb;
50 79
51typedef aio_cb *aio_req; 80typedef aio_cb *aio_req;
52 81
53static int started; 82static int started, wanted;
54static int nreqs; 83static volatile int nreqs;
55static int max_outstanding = 1<<30; 84static int max_outstanding = 1<<30;
56static int respipe [2]; 85static int respipe [2];
57 86
58static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 87static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
59static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 88static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
60static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 89static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
61 90
62static volatile aio_req reqs, reqe; /* queue start, queue end */ 91static volatile aio_req reqs, reqe; /* queue start, queue end */
63static volatile aio_req ress, rese; /* queue start, queue end */ 92static volatile aio_req ress, rese; /* queue start, queue end */
64 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}
116
65static void 117static void
66poll_wait () 118poll_wait ()
67{ 119{
68 if (!nreqs) 120 if (nreqs && !ress)
69 return; 121 {
70
71 fd_set rfd; 122 fd_set rfd;
72 FD_ZERO(&rfd); 123 FD_ZERO(&rfd);
73 FD_SET(respipe [0], &rfd); 124 FD_SET(respipe [0], &rfd);
74 125
75 select (respipe [0] + 1, &rfd, 0, 0, 0); 126 select (respipe [0] + 1, &rfd, 0, 0, 0);
127 }
76} 128}
77 129
78static int 130static int
79poll_cb () 131poll_cb ()
80{ 132{
81 dSP; 133 dSP;
82 int count = 0; 134 int count = 0;
135 int do_croak = 0;
83 aio_req req; 136 aio_req req;
84
85 {
86 /* read and signals sent by the worker threads */
87 char buf [32];
88 while (read (respipe [0], buf, 32) > 0)
89 ;
90 }
91 137
92 for (;;) 138 for (;;)
93 { 139 {
94 pthread_mutex_lock (&reslock); 140 pthread_mutex_lock (&reslock);
95
96 req = ress; 141 req = ress;
97 142
98 if (ress) 143 if (req)
99 { 144 {
100 ress = ress->next; 145 ress = req->next;
146
101 if (!ress) rese = 0; 147 if (!ress)
148 {
149 /* read any signals sent by the worker threads */
150 char buf [32];
151 while (read (respipe [0], buf, 32) == 32)
152 ;
153
154 rese = 0;
155 }
102 } 156 }
103 157
104 pthread_mutex_unlock (&reslock); 158 pthread_mutex_unlock (&reslock);
105 159
106 if (!req) 160 if (!req)
… …
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->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
126 { 179 {
127 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 180 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
128 PL_laststatval = req->result; 181 PL_laststatval = req->result;
129 PL_statcache = *(req->statdata); 182 PL_statcache = *(req->statdata);
130
131 Safefree (req->statdata);
132 } 183 }
133 184
185 ENTER;
134 PUSHMARK (SP); 186 PUSHMARK (SP);
135 XPUSHs (sv_2mortal (newSViv (req->result)));
136 187
137 if (req->type == REQ_OPEN) 188 if (req->type == REQ_READDIR)
138 { 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 {
139 /* convert fd to fh */ 217 /* convert fd to fh */
140 SV *fh; 218 SV *fh;
141 219
142 PUTBACK; 220 PUTBACK;
143 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 221 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
144 SPAGAIN; 222 SPAGAIN;
145 223
146 fh = POPs; 224 fh = SvREFCNT_inc (POPs);
147 225
148 PUSHMARK (SP); 226 PUSHMARK (SP);
149 XPUSHs (fh); 227 XPUSHs (sv_2mortal (fh));
228 }
150 } 229 }
151 230
152 if (SvOK (req->callback)) 231 if (SvOK (req->callback))
153 { 232 {
154 PUTBACK; 233 PUTBACK;
155 call_sv (req->callback, G_VOID | G_EVAL); 234 call_sv (req->callback, G_VOID | G_EVAL);
156 SPAGAIN; 235 SPAGAIN;
236
237 if (SvTRUE (ERRSV))
238 {
239 free_req (req);
240 croak (0);
241 }
157 } 242 }
243
158 244 LEAVE;
159 if (req->callback)
160 SvREFCNT_dec (req->callback);
161 245
162 errno = errorno; 246 errno = errorno;
163 count++; 247 count++;
164 } 248 }
165 249
166 Safefree (req); 250 free_req (req);
167 } 251 }
168 252
169 return count; 253 return count;
170} 254}
171 255
… …
192} 276}
193 277
194static void 278static void
195send_req (aio_req req) 279send_req (aio_req req)
196{ 280{
281 while (started < wanted && nreqs >= started)
282 start_thread ();
283
197 nreqs++; 284 nreqs++;
198 285
199 pthread_mutex_lock (&reqlock); 286 pthread_mutex_lock (&reqlock);
200 287
201 req->next = 0; 288 req->next = 0;
… …
209 reqe = reqs = req; 296 reqe = reqs = req;
210 297
211 pthread_cond_signal (&reqwait); 298 pthread_cond_signal (&reqwait);
212 pthread_mutex_unlock (&reqlock); 299 pthread_mutex_unlock (&reqlock);
213 300
214 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)
215 { 343 {
216 poll_wait (); 344 poll_wait ();
217 poll_cb (); 345 poll_cb ();
218 } 346 }
219} 347}
220 348
221static void 349static void create_pipe ()
222end_thread (void)
223{ 350{
224 aio_req req; 351 if (pipe (respipe))
225 New (0, req, 1, aio_cb); 352 croak ("unable to initialize result pipe");
226 req->type = REQ_QUIT;
227 353
228 send_req (req); 354 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
229} 355 croak ("cannot set result pipe to nonblocking mode");
230 356
231static void 357 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
232read_write (int dowrite, int fd, off_t offset, size_t length, 358 croak ("cannot set result pipe to nonblocking mode");
233 SV *data, STRLEN dataoffset, SV *callback) 359}
234{
235 aio_req req;
236 STRLEN svlen;
237 char *svptr = SvPV (data, svlen);
238 360
239 SvUPGRADE (data, SVt_PV); 361/*****************************************************************************/
240 SvPOK_on (data); 362/* work around various missing functions */
241 363
242 if (dataoffset < 0) 364#if !HAVE_PREADWRITE
365# define pread aio_pread
366# define pwrite aio_pwrite
367
368/*
369 * make our pread/pwrite safe against themselves, but not against
370 * normal read/write by using a mutex. slows down execution a lot,
371 * but that's your problem, not mine.
372 */
373static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374
375static ssize_t
376pread (int fd, void *buf, size_t count, off_t offset)
377{
378 ssize_t res;
379 off_t ooffset;
380
381 pthread_mutex_lock (&preadwritelock);
382 ooffset = lseek (fd, 0, SEEK_CUR);
383 lseek (fd, offset, SEEK_SET);
384 res = read (fd, buf, count);
385 lseek (fd, ooffset, SEEK_SET);
386 pthread_mutex_unlock (&preadwritelock);
387
388 return res;
389}
390
391static ssize_t
392pwrite (int fd, void *buf, size_t count, off_t offset)
393{
394 ssize_t res;
395 off_t ooffset;
396
397 pthread_mutex_lock (&preadwritelock);
398 ooffset = lseek (fd, 0, SEEK_CUR);
399 lseek (fd, offset, SEEK_SET);
400 res = write (fd, buf, count);
401 lseek (fd, offset, SEEK_SET);
402 pthread_mutex_unlock (&preadwritelock);
403
404 return res;
405}
406#endif
407
408#if !HAVE_FDATASYNC
409# define fdatasync fsync
410#endif
411
412#if !HAVE_READAHEAD
413# define readahead aio_readahead
414
415static ssize_t
416readahead (int fd, off_t offset, size_t count)
417{
418 char readahead_buf[4096];
419
420 while (count > 0)
421 {
422 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
423
424 pread (fd, readahead_buf, len, offset);
243 dataoffset += svlen; 425 offset += len;
244 426 count -= len;
245 if (dataoffset < 0 || dataoffset > svlen)
246 croak ("data offset outside of string");
247
248 if (dowrite)
249 { 427 }
250 /* write: check length and adjust. */ 428
251 if (length < 0 || length + dataoffset > svlen) 429 errno = 0;
252 length = svlen - dataoffset; 430}
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);
253 } 453 }
254 else 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 */
255 { 482 {
256 /* read: grow scalar as necessary */ 483 off_t sbytes;
257 svptr = SvGROW (data, length + dataoffset); 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 )
258 } 523 {
524 /* emulate sendfile. this is a major pain in the ass */
525 char buf[4096];
526 res = 0;
259 527
260 if (length < 0) 528 while (count)
261 croak ("length must not be negative"); 529 {
530 ssize_t cnt;
531
532 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
262 533
263 Newz (0, req, 1, aio_cb); 534 if (cnt <= 0)
535 {
536 if (cnt && !res) res = -1;
537 break;
538 }
264 539
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
265 if (!req) 574 if (!dirp)
266 croak ("out of memory during aio_req allocation"); 575 return -1;
267 576
268 req->type = dowrite ? REQ_WRITE : REQ_READ; 577 names = malloc (memlen);
269 req->fd = fd;
270 req->offset = offset;
271 req->length = length;
272 req->data = SvREFCNT_inc (data);
273 req->dataptr = (char *)svptr + dataoffset;
274 req->callback = SvREFCNT_inc (callback);
275 578
276 send_req (req); 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;
277} 619}
620
621/*****************************************************************************/
278 622
279static void * 623static void *
280aio_proc (void *thr_arg) 624aio_proc (void *thr_arg)
281{ 625{
282 aio_req req; 626 aio_req req;
… …
308 652
309 type = req->type; 653 type = req->type;
310 654
311 switch (type) 655 switch (type)
312 { 656 {
313 case REQ_READ: req->result = pread64 (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;
314 case REQ_WRITE: req->result = pwrite64 (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;
315#if SYS_readahead 659
316 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;
317#else 661 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
318 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
319#endif
320 662
321 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 663 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
322 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 664 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
323 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 665 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
324 666
325 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;
326 case REQ_CLOSE: req->result = close (req->fd); break; 668 case REQ_CLOSE: req->result = close (req->fd); break;
327 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 669 case REQ_UNLINK: req->result = unlink (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;
673 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
328 674
675 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
329 case REQ_FSYNC: req->result = fsync (req->fd); break; 676 case REQ_FSYNC: req->result = fsync (req->fd); break;
330 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 677 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
331 678
332 case REQ_QUIT: 679 case REQ_QUIT:
333 break; 680 break;
334 681
335 default: 682 default:
… …
361 while (type != REQ_QUIT); 708 while (type != REQ_QUIT);
362 709
363 return 0; 710 return 0;
364} 711}
365 712
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 ();
768}
769
770#define dREQ \
771 aio_req req; \
772 \
773 if (SvOK (callback) && !SvROK (callback)) \
774 croak ("clalback must be undef or of reference type"); \
775 \
776 Newz (0, req, 1, aio_cb); \
777 if (!req) \
778 croak ("out of memory during aio_req allocation"); \
779 \
780 req->callback = newSVsv (callback);
781
366MODULE = IO::AIO PACKAGE = IO::AIO 782MODULE = IO::AIO PACKAGE = IO::AIO
367 783
368PROTOTYPES: ENABLE 784PROTOTYPES: ENABLE
369 785
370BOOT: 786BOOT:
371{ 787{
372 if (pipe (respipe)) 788 HV *stash = gv_stashpv ("IO::AIO", 1);
373 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));
374 792
375 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 793 create_pipe ();
376 croak ("cannot set result pipe to nonblocking mode"); 794 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
377
378 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
379 croak ("cannot set result pipe to nonblocking mode");
380} 795}
381 796
382void 797void
383min_parallel(nthreads) 798min_parallel (nthreads)
384 int nthreads 799 int nthreads
385 PROTOTYPE: $ 800 PROTOTYPE: $
386 CODE:
387 while (nthreads > started)
388 start_thread ();
389 801
390void 802void
391max_parallel(nthreads) 803max_parallel (nthreads)
392 int nthreads 804 int nthreads
393 PROTOTYPE: $ 805 PROTOTYPE: $
394 CODE:
395{
396 int cur = started;
397 while (cur > nthreads)
398 {
399 end_thread ();
400 cur--;
401 }
402
403 while (started > nthreads)
404 {
405 poll_wait ();
406 poll_cb ();
407 }
408}
409 806
410int 807int
411max_outstanding(nreqs) 808max_outstanding (nreqs)
412 int nreqs 809 int nreqs
413 PROTOTYPE: $ 810 PROTOTYPE: $
414 CODE: 811 CODE:
415 RETVAL = max_outstanding; 812 RETVAL = max_outstanding;
416 max_outstanding = nreqs; 813 max_outstanding = nreqs;
417 814
418void 815void
419aio_open(pathname,flags,mode,callback=&PL_sv_undef) 816aio_open (pathname,flags,mode,callback=&PL_sv_undef)
420 SV * pathname 817 SV * pathname
421 int flags 818 int flags
422 int mode 819 int mode
423 SV * callback 820 SV * callback
424 PROTOTYPE: $$$;$ 821 PROTOTYPE: $$$;$
425 CODE: 822 CODE:
426{ 823{
427 aio_req req; 824 dREQ;
428
429 Newz (0, req, 1, aio_cb);
430
431 if (!req)
432 croak ("out of memory during aio_req allocation");
433 825
434 req->type = REQ_OPEN; 826 req->type = REQ_OPEN;
435 req->data = newSVsv (pathname); 827 req->data = newSVsv (pathname);
436 req->dataptr = SvPV_nolen (req->data); 828 req->dataptr = SvPVbyte_nolen (req->data);
437 req->fd = flags; 829 req->fd = flags;
438 req->mode = mode; 830 req->mode = mode;
439 req->callback = SvREFCNT_inc (callback);
440 831
441 send_req (req); 832 send_req (req);
442} 833}
443 834
444void 835void
445aio_close(fh,callback=&PL_sv_undef) 836aio_close (fh,callback=&PL_sv_undef)
446 InputStream fh 837 SV * fh
447 SV * callback 838 SV * callback
448 PROTOTYPE: $;$ 839 PROTOTYPE: $;$
449 ALIAS: 840 ALIAS:
450 aio_close = REQ_CLOSE 841 aio_close = REQ_CLOSE
451 aio_fsync = REQ_FSYNC 842 aio_fsync = REQ_FSYNC
452 aio_fdatasync = REQ_FDATASYNC 843 aio_fdatasync = REQ_FDATASYNC
453 CODE: 844 CODE:
454{ 845{
455 aio_req req; 846 dREQ;
456
457 Newz (0, req, 1, aio_cb);
458
459 if (!req)
460 croak ("out of memory during aio_req allocation");
461 847
462 req->type = ix; 848 req->type = ix;
849 req->fh = newSVsv (fh);
463 req->fd = PerlIO_fileno (fh); 850 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
464 req->callback = SvREFCNT_inc (callback);
465 851
466 send_req (req); 852 send_req (req);
467} 853}
468 854
469void 855void
470aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 856aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
471 InputStream fh 857 SV * fh
472 UV offset 858 UV offset
473 IV length 859 UV length
474 SV * data 860 SV * data
475 IV dataoffset 861 UV dataoffset
476 SV * callback 862 SV * callback
863 ALIAS:
864 aio_read = REQ_READ
865 aio_write = REQ_WRITE
477 PROTOTYPE: $$$$$;$ 866 PROTOTYPE: $$$$$;$
478 CODE: 867 CODE:
479 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); 868{
869 aio_req req;
870 STRLEN svlen;
871 char *svptr = SvPVbyte (data, svlen);
480 872
873 SvUPGRADE (data, SVt_PV);
874 SvPOK_on (data);
875
876 if (dataoffset < 0)
877 dataoffset += svlen;
878
879 if (dataoffset < 0 || dataoffset > svlen)
880 croak ("data offset outside of string");
881
882 if (ix == REQ_WRITE)
883 {
884 /* write: check length and adjust. */
885 if (length < 0 || length + dataoffset > svlen)
886 length = svlen - dataoffset;
887 }
888 else
889 {
890 /* read: grow scalar as necessary */
891 svptr = SvGROW (data, length + dataoffset);
892 }
893
894 if (length < 0)
895 croak ("length must not be negative");
896
897 {
898 dREQ;
899
900 req->type = ix;
901 req->fh = newSVsv (fh);
902 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
903 : IoOFP (sv_2io (fh)));
904 req->offset = offset;
905 req->length = length;
906 req->data = SvREFCNT_inc (data);
907 req->dataptr = (char *)svptr + dataoffset;
908
909 if (!SvREADONLY (data))
910 {
911 SvREADONLY_on (data);
912 req->data2ptr = (void *)data;
913 }
914
915 send_req (req);
916 }
917}
918
481void 919void
482aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 920aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
483 OutputStream fh 921 SV * out_fh
922 SV * in_fh
484 UV offset 923 UV in_offset
485 IV length 924 UV length
486 SV * data
487 IV dataoffset
488 SV * callback 925 SV * callback
489 PROTOTYPE: $$$$$;$ 926 PROTOTYPE: $$$$;$
490 CODE: 927 CODE:
491 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); 928{
929 dREQ;
492 930
931 req->type = REQ_SENDFILE;
932 req->fh = newSVsv (out_fh);
933 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
934 req->fh2 = newSVsv (in_fh);
935 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936 req->offset = in_offset;
937 req->length = length;
938
939 send_req (req);
940}
941
493void 942void
494aio_readahead(fh,offset,length,callback=&PL_sv_undef) 943aio_readahead (fh,offset,length,callback=&PL_sv_undef)
495 InputStream fh 944 SV * fh
496 UV offset 945 UV offset
497 IV length 946 IV length
498 SV * callback 947 SV * callback
499 PROTOTYPE: $$$;$ 948 PROTOTYPE: $$$;$
500 CODE: 949 CODE:
501{ 950{
502 aio_req req; 951 dREQ;
503
504 if (length < 0)
505 croak ("length must not be negative");
506
507 Newz (0, req, 1, aio_cb);
508
509 if (!req)
510 croak ("out of memory during aio_req allocation");
511 952
512 req->type = REQ_READAHEAD; 953 req->type = REQ_READAHEAD;
954 req->fh = newSVsv (fh);
513 req->fd = PerlIO_fileno (fh); 955 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
514 req->offset = offset; 956 req->offset = offset;
515 req->length = length; 957 req->length = length;
516 req->callback = SvREFCNT_inc (callback);
517 958
518 send_req (req); 959 send_req (req);
519} 960}
520 961
521void 962void
522aio_stat(fh_or_path,callback=&PL_sv_undef) 963aio_stat (fh_or_path,callback=&PL_sv_undef)
523 SV * fh_or_path 964 SV * fh_or_path
524 SV * callback 965 SV * callback
525 ALIAS: 966 ALIAS:
526 aio_stat = REQ_STAT 967 aio_stat = REQ_STAT
527 aio_lstat = REQ_LSTAT 968 aio_lstat = REQ_LSTAT
528 CODE: 969 CODE:
529{ 970{
530 aio_req req; 971 dREQ;
531
532 Newz (0, req, 1, aio_cb);
533
534 if (!req)
535 croak ("out of memory during aio_req allocation");
536 972
537 New (0, req->statdata, 1, Stat_t); 973 New (0, req->statdata, 1, Stat_t);
538
539 if (!req->statdata) 974 if (!req->statdata)
975 {
976 free_req (req);
540 croak ("out of memory during aio_req->statdata allocation"); 977 croak ("out of memory during aio_req->statdata allocation");
978 }
541 979
542 if (SvPOK (fh_or_path)) 980 if (SvPOK (fh_or_path))
543 { 981 {
544 req->type = ix; 982 req->type = ix;
545 req->data = newSVsv (fh_or_path); 983 req->data = newSVsv (fh_or_path);
546 req->dataptr = SvPV_nolen (req->data); 984 req->dataptr = SvPVbyte_nolen (req->data);
547 } 985 }
548 else 986 else
549 { 987 {
550 req->type = REQ_FSTAT; 988 req->type = REQ_FSTAT;
989 req->fh = newSVsv (fh_or_path);
551 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 990 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
552 } 991 }
553 992
554 req->callback = SvREFCNT_inc (callback);
555
556 send_req (req); 993 send_req (req);
557} 994}
558 995
559void 996void
560aio_unlink(pathname,callback=&PL_sv_undef) 997aio_unlink (pathname,callback=&PL_sv_undef)
561 SV * pathname 998 SV * pathname
562 SV * callback 999 SV * callback
1000 ALIAS:
1001 aio_unlink = REQ_UNLINK
1002 aio_rmdir = REQ_RMDIR
1003 aio_readdir = REQ_READDIR
563 CODE: 1004 CODE:
564{ 1005{
565 aio_req req; 1006 dREQ;
566 1007
567 Newz (0, req, 1, aio_cb); 1008 req->type = ix;
568
569 if (!req)
570 croak ("out of memory during aio_req allocation");
571
572 req->type = REQ_UNLINK;
573 req->data = newSVsv (pathname); 1009 req->data = newSVsv (pathname);
574 req->dataptr = SvPV_nolen (req->data); 1010 req->dataptr = SvPVbyte_nolen (req->data);
575 req->callback = SvREFCNT_inc (callback);
576 1011
577 send_req (req); 1012 send_req (req);
578} 1013}
579 1014
580void 1015void
1016aio_link (oldpath,newpath,callback=&PL_sv_undef)
1017 SV * oldpath
1018 SV * newpath
1019 SV * callback
1020 ALIAS:
1021 aio_link = REQ_LINK
1022 aio_symlink = REQ_SYMLINK
1023 aio_rename = REQ_RENAME
1024 CODE:
1025{
1026 dREQ;
1027
1028 req->type = ix;
1029 req->fh = newSVsv (oldpath);
1030 req->data2ptr = SvPVbyte_nolen (req->fh);
1031 req->data = newSVsv (newpath);
1032 req->dataptr = SvPVbyte_nolen (req->data);
1033
1034 send_req (req);
1035}
1036
1037void
581flush() 1038flush ()
582 PROTOTYPE: 1039 PROTOTYPE:
583 CODE: 1040 CODE:
584 while (nreqs) 1041 while (nreqs)
585 { 1042 {
586 poll_wait (); 1043 poll_wait ();

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines