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 1.10 by root, Wed Jul 13 00:13:09 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
5#define _XOPEN_SOURCE 500 8#include "autoconf/config.h"
6 9
10#include <pthread.h>
11
12#include <stddef.h>
13#include <errno.h>
7#include <sys/types.h> 14#include <sys/types.h>
8#include <sys/stat.h> 15#include <sys/stat.h>
9 16#include <limits.h>
10#include <unistd.h> 17#include <unistd.h>
11#include <fcntl.h> 18#include <fcntl.h>
12#include <signal.h> 19#include <signal.h>
13#include <sched.h> 20#include <sched.h>
21
22#if HAVE_SENDFILE
14#if __linux 23# if __linux
24# include <sys/sendfile.h>
25# elif __freebsd
15#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
16#endif 34# endif
35#endif
17 36
18#include <pthread.h> 37/* used for struct dirent, AIX doesn't provide it */
19 38#ifndef NAME_MAX
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 39# define NAME_MAX 4096
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 40#endif
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
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, REQ_UNLINK, 53 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 54 REQ_FSYNC, REQ_FDATASYNC,
55 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56 REQ_READDIR,
57 REQ_LINK, REQ_SYMLINK,
36}; 58};
37 59
38typedef struct aio_cb { 60typedef struct aio_cb {
39 struct aio_cb *volatile next; 61 struct aio_cb *volatile next;
40 62
41 int type; 63 int type;
42 64
65 /* should receive a cleanup, with unions */
43 int fd; 66 int fd, fd2;
44 off_t offset; 67 off_t offset;
45 size_t length; 68 size_t length;
46 ssize_t result; 69 ssize_t result;
47 mode_t mode; /* open */ 70 mode_t mode; /* open */
48 int errorno; 71 int errorno;
49 SV *data, *callback; 72 SV *data, *callback;
50 void *dataptr; 73 SV *fh, *fh2;
74 void *dataptr, *data2ptr;
51 STRLEN dataoffset; 75 STRLEN dataoffset;
52 76
53 Stat_t *statdata; 77 Stat_t *statdata;
54} aio_cb; 78} aio_cb;
55 79
56typedef aio_cb *aio_req; 80typedef aio_cb *aio_req;
57 81
58static int started; 82static int started, wanted;
59static int nreqs; 83static volatile int nreqs;
60static int max_outstanding = 1<<30; 84static int max_outstanding = 1<<30;
61static int respipe [2]; 85static int respipe [2];
62 86
63static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 87static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
64static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 88static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
65static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 89static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66 90
67static volatile aio_req reqs, reqe; /* queue start, queue end */ 91static volatile aio_req reqs, reqe; /* queue start, queue end */
68static volatile aio_req ress, rese; /* queue start, queue end */ 92static volatile aio_req ress, rese; /* queue start, queue end */
69 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
70static void 117static void
71poll_wait () 118poll_wait ()
72{ 119{
73 if (!nreqs) 120 if (nreqs && !ress)
74 return; 121 {
75
76 fd_set rfd; 122 fd_set rfd;
77 FD_ZERO(&rfd); 123 FD_ZERO(&rfd);
78 FD_SET(respipe [0], &rfd); 124 FD_SET(respipe [0], &rfd);
79 125
80 select (respipe [0] + 1, &rfd, 0, 0, 0); 126 select (respipe [0] + 1, &rfd, 0, 0, 0);
127 }
81} 128}
82 129
83static int 130static int
84poll_cb () 131poll_cb ()
85{ 132{
86 dSP; 133 dSP;
87 int count = 0; 134 int count = 0;
135 int do_croak = 0;
88 aio_req req; 136 aio_req req;
89
90 {
91 /* read and signals sent by the worker threads */
92 char buf [32];
93 while (read (respipe [0], buf, 32) > 0)
94 ;
95 }
96 137
97 for (;;) 138 for (;;)
98 { 139 {
99 pthread_mutex_lock (&reslock); 140 pthread_mutex_lock (&reslock);
100
101 req = ress; 141 req = ress;
102 142
103 if (ress) 143 if (req)
104 { 144 {
105 ress = ress->next; 145 ress = req->next;
146
106 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 }
107 } 156 }
108 157
109 pthread_mutex_unlock (&reslock); 158 pthread_mutex_unlock (&reslock);
110 159
111 if (!req) 160 if (!req)
… …
119 { 168 {
120 int errorno = errno; 169 int errorno = errno;
121 errno = req->errorno; 170 errno = req->errorno;
122 171
123 if (req->type == REQ_READ) 172 if (req->type == REQ_READ)
124 SvCUR_set (req->data, req->dataoffset 173 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
125 + req->result > 0 ? req->result : 0);
126 174
175 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176 SvREADONLY_off (req->data);
177
127 if (req->data) 178 if (req->statdata)
128 SvREFCNT_dec (req->data);
129
130 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
131 { 179 {
132 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 180 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
133 PL_laststatval = req->result; 181 PL_laststatval = req->result;
134 PL_statcache = *(req->statdata); 182 PL_statcache = *(req->statdata);
135
136 Safefree (req->statdata);
137 } 183 }
138 184
185 ENTER;
139 PUSHMARK (SP); 186 PUSHMARK (SP);
140 XPUSHs (sv_2mortal (newSViv (req->result)));
141 187
142 if (req->type == REQ_OPEN) 188 if (req->type == REQ_READDIR)
143 { 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 {
144 /* convert fd to fh */ 217 /* convert fd to fh */
145 SV *fh; 218 SV *fh;
146 219
147 PUTBACK; 220 PUTBACK;
148 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 221 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149 SPAGAIN; 222 SPAGAIN;
150 223
151 fh = POPs; 224 fh = SvREFCNT_inc (POPs);
152 225
153 PUSHMARK (SP); 226 PUSHMARK (SP);
154 XPUSHs (fh); 227 XPUSHs (sv_2mortal (fh));
228 }
155 } 229 }
156 230
157 if (SvOK (req->callback)) 231 if (SvOK (req->callback))
158 { 232 {
159 PUTBACK; 233 PUTBACK;
160 call_sv (req->callback, G_VOID | G_EVAL); 234 call_sv (req->callback, G_VOID | G_EVAL);
161 SPAGAIN; 235 SPAGAIN;
236
237 if (SvTRUE (ERRSV))
238 {
239 free_req (req);
240 croak (0);
241 }
162 } 242 }
243
163 244 LEAVE;
164 if (req->callback)
165 SvREFCNT_dec (req->callback);
166 245
167 errno = errorno; 246 errno = errorno;
168 count++; 247 count++;
169 } 248 }
170 249
171 Safefree (req); 250 free_req (req);
172 } 251 }
173 252
174 return count; 253 return count;
175} 254}
176 255
… …
197} 276}
198 277
199static void 278static void
200send_req (aio_req req) 279send_req (aio_req req)
201{ 280{
281 while (started < wanted && nreqs >= started)
282 start_thread ();
283
202 nreqs++; 284 nreqs++;
203 285
204 pthread_mutex_lock (&reqlock); 286 pthread_mutex_lock (&reqlock);
205 287
206 req->next = 0; 288 req->next = 0;
… …
214 reqe = reqs = req; 296 reqe = reqs = req;
215 297
216 pthread_cond_signal (&reqwait); 298 pthread_cond_signal (&reqwait);
217 pthread_mutex_unlock (&reqlock); 299 pthread_mutex_unlock (&reqlock);
218 300
219 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)
220 { 343 {
221 poll_wait (); 344 poll_wait ();
222 poll_cb (); 345 poll_cb ();
223 } 346 }
224} 347}
225 348
226static void 349static void create_pipe ()
227end_thread (void)
228{ 350{
229 aio_req req; 351 if (pipe (respipe))
230 New (0, req, 1, aio_cb); 352 croak ("unable to initialize result pipe");
231 req->type = REQ_QUIT;
232 353
233 send_req (req); 354 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
234} 355 croak ("cannot set result pipe to nonblocking mode");
235 356
236static void 357 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
237read_write (int dowrite, int fd, off_t offset, size_t length, 358 croak ("cannot set result pipe to nonblocking mode");
238 SV *data, STRLEN dataoffset, SV *callback) 359}
239{
240 aio_req req;
241 STRLEN svlen;
242 char *svptr = SvPV (data, svlen);
243 360
244 SvUPGRADE (data, SVt_PV); 361/*****************************************************************************/
245 SvPOK_on (data); 362/* work around various missing functions */
246 363
247 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);
248 dataoffset += svlen; 425 offset += len;
249 426 count -= len;
250 if (dataoffset < 0 || dataoffset > svlen)
251 croak ("data offset outside of string");
252
253 if (dowrite)
254 { 427 }
255 /* write: check length and adjust. */ 428
256 if (length < 0 || length + dataoffset > svlen) 429 errno = 0;
257 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);
258 } 453 }
259 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 */
260 { 482 {
261 /* read: grow scalar as necessary */ 483 off_t sbytes;
262 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 )
263 } 523 {
524 /* emulate sendfile. this is a major pain in the ass */
525 char buf[4096];
526 res = 0;
264 527
265 if (length < 0) 528 while (count)
266 croak ("length must not be negative"); 529 {
530 ssize_t cnt;
531
532 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
267 533
268 Newz (0, req, 1, aio_cb); 534 if (cnt <= 0)
535 {
536 if (cnt && !res) res = -1;
537 break;
538 }
269 539
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
270 if (!req) 574 if (!dirp)
271 croak ("out of memory during aio_req allocation"); 575 return -1;
272 576
273 req->type = dowrite ? REQ_WRITE : REQ_READ; 577 names = malloc (memlen);
274 req->fd = fd;
275 req->offset = offset;
276 req->length = length;
277 req->data = SvREFCNT_inc (data);
278 req->dataptr = (char *)svptr + dataoffset;
279 req->callback = SvREFCNT_inc (callback);
280 578
281 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;
282} 619}
620
621/*****************************************************************************/
283 622
284static void * 623static void *
285aio_proc (void *thr_arg) 624aio_proc (void *thr_arg)
286{ 625{
287 aio_req req; 626 aio_req req;
… …
315 654
316 switch (type) 655 switch (type)
317 { 656 {
318 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;
319 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;
320#if SYS_readahead 659
321 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;
322#else 661 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
323 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
324#endif
325 662
326 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 663 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
327 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 664 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
328 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 665 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
329 666
330 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;
331 case REQ_CLOSE: req->result = close (req->fd); break; 668 case REQ_CLOSE: req->result = close (req->fd); break;
332 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;
333 674
675 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
334 case REQ_FSYNC: req->result = fsync (req->fd); break; 676 case REQ_FSYNC: req->result = fsync (req->fd); break;
335 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 677 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
336 678
337 case REQ_QUIT: 679 case REQ_QUIT:
338 break; 680 break;
339 681
340 default: 682 default:
… …
366 while (type != REQ_QUIT); 708 while (type != REQ_QUIT);
367 709
368 return 0; 710 return 0;
369} 711}
370 712
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
371MODULE = IO::AIO PACKAGE = IO::AIO 782MODULE = IO::AIO PACKAGE = IO::AIO
372 783
373PROTOTYPES: ENABLE 784PROTOTYPES: ENABLE
374 785
375BOOT: 786BOOT:
376{ 787{
377 if (pipe (respipe)) 788 HV *stash = gv_stashpv ("IO::AIO", 1);
378 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));
379 792
380 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 793 create_pipe ();
381 croak ("cannot set result pipe to nonblocking mode"); 794 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
382
383 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
384 croak ("cannot set result pipe to nonblocking mode");
385} 795}
386 796
387void 797void
388min_parallel(nthreads) 798min_parallel (nthreads)
389 int nthreads 799 int nthreads
390 PROTOTYPE: $ 800 PROTOTYPE: $
391 CODE:
392 while (nthreads > started)
393 start_thread ();
394 801
395void 802void
396max_parallel(nthreads) 803max_parallel (nthreads)
397 int nthreads 804 int nthreads
398 PROTOTYPE: $ 805 PROTOTYPE: $
399 CODE:
400{
401 int cur = started;
402 while (cur > nthreads)
403 {
404 end_thread ();
405 cur--;
406 }
407
408 while (started > nthreads)
409 {
410 poll_wait ();
411 poll_cb ();
412 }
413}
414 806
415int 807int
416max_outstanding(nreqs) 808max_outstanding (nreqs)
417 int nreqs 809 int nreqs
418 PROTOTYPE: $ 810 PROTOTYPE: $
419 CODE: 811 CODE:
420 RETVAL = max_outstanding; 812 RETVAL = max_outstanding;
421 max_outstanding = nreqs; 813 max_outstanding = nreqs;
422 814
423void 815void
424aio_open(pathname,flags,mode,callback=&PL_sv_undef) 816aio_open (pathname,flags,mode,callback=&PL_sv_undef)
425 SV * pathname 817 SV * pathname
426 int flags 818 int flags
427 int mode 819 int mode
428 SV * callback 820 SV * callback
429 PROTOTYPE: $$$;$ 821 PROTOTYPE: $$$;$
430 CODE: 822 CODE:
431{ 823{
432 aio_req req; 824 dREQ;
433
434 Newz (0, req, 1, aio_cb);
435
436 if (!req)
437 croak ("out of memory during aio_req allocation");
438 825
439 req->type = REQ_OPEN; 826 req->type = REQ_OPEN;
440 req->data = newSVsv (pathname); 827 req->data = newSVsv (pathname);
441 req->dataptr = SvPV_nolen (req->data); 828 req->dataptr = SvPVbyte_nolen (req->data);
442 req->fd = flags; 829 req->fd = flags;
443 req->mode = mode; 830 req->mode = mode;
444 req->callback = SvREFCNT_inc (callback);
445 831
446 send_req (req); 832 send_req (req);
447} 833}
448 834
449void 835void
450aio_close(fh,callback=&PL_sv_undef) 836aio_close (fh,callback=&PL_sv_undef)
451 InputStream fh 837 SV * fh
452 SV * callback 838 SV * callback
453 PROTOTYPE: $;$ 839 PROTOTYPE: $;$
454 ALIAS: 840 ALIAS:
455 aio_close = REQ_CLOSE 841 aio_close = REQ_CLOSE
456 aio_fsync = REQ_FSYNC 842 aio_fsync = REQ_FSYNC
457 aio_fdatasync = REQ_FDATASYNC 843 aio_fdatasync = REQ_FDATASYNC
458 CODE: 844 CODE:
459{ 845{
460 aio_req req; 846 dREQ;
461
462 Newz (0, req, 1, aio_cb);
463
464 if (!req)
465 croak ("out of memory during aio_req allocation");
466 847
467 req->type = ix; 848 req->type = ix;
849 req->fh = newSVsv (fh);
468 req->fd = PerlIO_fileno (fh); 850 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
469 req->callback = SvREFCNT_inc (callback);
470 851
471 send_req (req); 852 send_req (req);
472} 853}
473 854
474void 855void
475aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 856aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
476 InputStream fh 857 SV * fh
477 UV offset 858 UV offset
478 IV length 859 UV length
479 SV * data 860 SV * data
480 IV dataoffset 861 UV dataoffset
481 SV * callback 862 SV * callback
863 ALIAS:
864 aio_read = REQ_READ
865 aio_write = REQ_WRITE
482 PROTOTYPE: $$$$$;$ 866 PROTOTYPE: $$$$$;$
483 CODE: 867 CODE:
484 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); 868{
869 aio_req req;
870 STRLEN svlen;
871 char *svptr = SvPVbyte (data, svlen);
485 872
873 SvUPGRADE (data, SVt_PV);
874 SvPOK_on (data);
875
876 if (dataoffset < 0)
877 dataoffset += svlen;
878
879 if (dataoffset < 0 || dataoffset > svlen)
880 croak ("data offset outside of string");
881
882 if (ix == REQ_WRITE)
883 {
884 /* write: check length and adjust. */
885 if (length < 0 || length + dataoffset > svlen)
886 length = svlen - dataoffset;
887 }
888 else
889 {
890 /* read: grow scalar as necessary */
891 svptr = SvGROW (data, length + dataoffset);
892 }
893
894 if (length < 0)
895 croak ("length must not be negative");
896
897 {
898 dREQ;
899
900 req->type = ix;
901 req->fh = newSVsv (fh);
902 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
903 : IoOFP (sv_2io (fh)));
904 req->offset = offset;
905 req->length = length;
906 req->data = SvREFCNT_inc (data);
907 req->dataptr = (char *)svptr + dataoffset;
908
909 if (!SvREADONLY (data))
910 {
911 SvREADONLY_on (data);
912 req->data2ptr = (void *)data;
913 }
914
915 send_req (req);
916 }
917}
918
486void 919void
487aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 920aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
488 OutputStream fh 921 SV * out_fh
922 SV * in_fh
489 UV offset 923 UV in_offset
490 IV length 924 UV length
491 SV * data
492 IV dataoffset
493 SV * callback 925 SV * callback
494 PROTOTYPE: $$$$$;$ 926 PROTOTYPE: $$$$;$
495 CODE: 927 CODE:
496 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); 928{
929 dREQ;
497 930
931 req->type = REQ_SENDFILE;
932 req->fh = newSVsv (out_fh);
933 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
934 req->fh2 = newSVsv (in_fh);
935 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936 req->offset = in_offset;
937 req->length = length;
938
939 send_req (req);
940}
941
498void 942void
499aio_readahead(fh,offset,length,callback=&PL_sv_undef) 943aio_readahead (fh,offset,length,callback=&PL_sv_undef)
500 InputStream fh 944 SV * fh
501 UV offset 945 UV offset
502 IV length 946 IV length
503 SV * callback 947 SV * callback
504 PROTOTYPE: $$$;$ 948 PROTOTYPE: $$$;$
505 CODE: 949 CODE:
506{ 950{
507 aio_req req; 951 dREQ;
508
509 if (length < 0)
510 croak ("length must not be negative");
511
512 Newz (0, req, 1, aio_cb);
513
514 if (!req)
515 croak ("out of memory during aio_req allocation");
516 952
517 req->type = REQ_READAHEAD; 953 req->type = REQ_READAHEAD;
954 req->fh = newSVsv (fh);
518 req->fd = PerlIO_fileno (fh); 955 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
519 req->offset = offset; 956 req->offset = offset;
520 req->length = length; 957 req->length = length;
521 req->callback = SvREFCNT_inc (callback);
522 958
523 send_req (req); 959 send_req (req);
524} 960}
525 961
526void 962void
527aio_stat(fh_or_path,callback=&PL_sv_undef) 963aio_stat (fh_or_path,callback=&PL_sv_undef)
528 SV * fh_or_path 964 SV * fh_or_path
529 SV * callback 965 SV * callback
530 ALIAS: 966 ALIAS:
531 aio_stat = REQ_STAT 967 aio_stat = REQ_STAT
532 aio_lstat = REQ_LSTAT 968 aio_lstat = REQ_LSTAT
533 CODE: 969 CODE:
534{ 970{
535 aio_req req; 971 dREQ;
536
537 Newz (0, req, 1, aio_cb);
538
539 if (!req)
540 croak ("out of memory during aio_req allocation");
541 972
542 New (0, req->statdata, 1, Stat_t); 973 New (0, req->statdata, 1, Stat_t);
543
544 if (!req->statdata) 974 if (!req->statdata)
975 {
976 free_req (req);
545 croak ("out of memory during aio_req->statdata allocation"); 977 croak ("out of memory during aio_req->statdata allocation");
978 }
546 979
547 if (SvPOK (fh_or_path)) 980 if (SvPOK (fh_or_path))
548 { 981 {
549 req->type = ix; 982 req->type = ix;
550 req->data = newSVsv (fh_or_path); 983 req->data = newSVsv (fh_or_path);
551 req->dataptr = SvPV_nolen (req->data); 984 req->dataptr = SvPVbyte_nolen (req->data);
552 } 985 }
553 else 986 else
554 { 987 {
555 req->type = REQ_FSTAT; 988 req->type = REQ_FSTAT;
989 req->fh = newSVsv (fh_or_path);
556 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 990 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
557 } 991 }
558 992
559 req->callback = SvREFCNT_inc (callback);
560
561 send_req (req); 993 send_req (req);
562} 994}
563 995
564void 996void
565aio_unlink(pathname,callback=&PL_sv_undef) 997aio_unlink (pathname,callback=&PL_sv_undef)
566 SV * pathname 998 SV * pathname
567 SV * callback 999 SV * callback
1000 ALIAS:
1001 aio_unlink = REQ_UNLINK
1002 aio_rmdir = REQ_RMDIR
1003 aio_readdir = REQ_READDIR
568 CODE: 1004 CODE:
569{ 1005{
570 aio_req req; 1006 dREQ;
571 1007
572 Newz (0, req, 1, aio_cb); 1008 req->type = ix;
573
574 if (!req)
575 croak ("out of memory during aio_req allocation");
576
577 req->type = REQ_UNLINK;
578 req->data = newSVsv (pathname); 1009 req->data = newSVsv (pathname);
579 req->dataptr = SvPV_nolen (req->data); 1010 req->dataptr = SvPVbyte_nolen (req->data);
580 req->callback = SvREFCNT_inc (callback);
581 1011
582 send_req (req); 1012 send_req (req);
583} 1013}
584 1014
585void 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
586flush() 1038flush ()
587 PROTOTYPE: 1039 PROTOTYPE:
588 CODE: 1040 CODE:
589 while (nreqs) 1041 while (nreqs)
590 { 1042 {
591 poll_wait (); 1043 poll_wait ();

Diff Legend

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