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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.11 by root, Wed Jul 20 21:55:27 2005 UTC vs.
Revision 1.41 by root, Sat Jun 24 19:14:04 2006 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>
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 volatile 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;
… …
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 && !ress) 120 if (nreqs && !ress)
74 { 121 {
… …
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, prv; 136 aio_req req;
89 137
90 static int rl;//D 138 for (;;)
91 //printf ("%d ENTER\n", ++rl);//D 139 {
92
93 pthread_mutex_lock (&reslock); 140 pthread_mutex_lock (&reslock);
141 req = ress;
94 142
95 { 143 if (req)
144 {
145 ress = req->next;
146
147 if (!ress)
148 {
96 /* read any signals sent by the worker threads */ 149 /* read any signals sent by the worker threads */
97 char buf [32]; 150 char buf [32];
98 while (read (respipe [0], buf, 32) > 0) 151 while (read (respipe [0], buf, 32) == 32)
152 ;
153
154 rese = 0;
155 }
99 ; 156 }
100 }
101 157
102 req = ress;
103 ress = rese = 0;
104
105 pthread_mutex_unlock (&reslock); 158 pthread_mutex_unlock (&reslock);
106 159
107 while (req) 160 if (!req)
108 { 161 break;
162
109 nreqs--; 163 nreqs--;
110 //printf ("%d count %d %p->%p\n", rl, count, req, req->next);//D
111 164
112 if (req->type == REQ_QUIT) 165 if (req->type == REQ_QUIT)
113 started--; 166 started--;
114 else 167 else
115 { 168 {
116 int errorno = errno; 169 int errorno = errno;
117 errno = req->errorno; 170 errno = req->errorno;
118 171
119 if (req->type == REQ_READ) 172 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset 173 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121 + req->result > 0 ? req->result : 0);
122 174
175 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176 SvREADONLY_off (req->data);
177
123 if (req->data) 178 if (req->statdata)
124 SvREFCNT_dec (req->data);
125
126 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127 { 179 {
128 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 180 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129 PL_laststatval = req->result; 181 PL_laststatval = req->result;
130 PL_statcache = *(req->statdata); 182 PL_statcache = *(req->statdata);
131
132 Safefree (req->statdata);
133 } 183 }
134 184
185 ENTER;
135 PUSHMARK (SP); 186 PUSHMARK (SP);
136 XPUSHs (sv_2mortal (newSViv (req->result)));
137 187
138 if (req->type == REQ_OPEN) 188 if (req->type == REQ_READDIR)
139 { 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 {
140 /* convert fd to fh */ 217 /* convert fd to fh */
141 SV *fh; 218 SV *fh;
142 219
143 PUTBACK; 220 PUTBACK;
144 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 221 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
145 SPAGAIN; 222 SPAGAIN;
146 223
147 fh = POPs; 224 fh = SvREFCNT_inc (POPs);
148 225
149 PUSHMARK (SP); 226 PUSHMARK (SP);
150 XPUSHs (fh); 227 XPUSHs (sv_2mortal (fh));
228 }
151 } 229 }
152 230
153 if (SvOK (req->callback)) 231 if (SvOK (req->callback))
154 { 232 {
155 PUTBACK; 233 PUTBACK;
156 call_sv (req->callback, G_VOID | G_EVAL); 234 call_sv (req->callback, G_VOID | G_EVAL);
157 SPAGAIN; 235 SPAGAIN;
236
237 if (SvTRUE (ERRSV))
238 {
239 free_req (req);
240 croak (0);
241 }
158 } 242 }
243
159 244 LEAVE;
160 if (req->callback)
161 SvREFCNT_dec (req->callback);
162 245
163 errno = errorno; 246 errno = errorno;
164 count++; 247 count++;
165 } 248 }
166 249
167 prv = req; 250 free_req (req);
168 req = req->next;
169 Safefree (prv);
170
171 /* TODO: croak on errors? */
172 } 251 }
173 252
174 //printf ("%d LEAVE %p %p\n", rl--, ress, rese);//D
175 return count; 253 return count;
176} 254}
177 255
178static void *aio_proc(void *arg); 256static void *aio_proc(void *arg);
179 257
… …
198} 276}
199 277
200static void 278static void
201send_req (aio_req req) 279send_req (aio_req req)
202{ 280{
281 while (started < wanted && nreqs >= started)
282 start_thread ();
283
203 nreqs++; 284 nreqs++;
204 285
205 pthread_mutex_lock (&reqlock); 286 pthread_mutex_lock (&reqlock);
206 287
207 req->next = 0; 288 req->next = 0;
… …
215 reqe = reqs = req; 296 reqe = reqs = req;
216 297
217 pthread_cond_signal (&reqwait); 298 pthread_cond_signal (&reqwait);
218 pthread_mutex_unlock (&reqlock); 299 pthread_mutex_unlock (&reqlock);
219 300
220 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)
221 { 343 {
222 poll_wait (); 344 poll_wait ();
223 poll_cb (); 345 poll_cb ();
224 } 346 }
225} 347}
226 348
227static void 349static void create_pipe ()
228end_thread (void)
229{ 350{
230 aio_req req; 351 if (pipe (respipe))
231 New (0, req, 1, aio_cb); 352 croak ("unable to initialize result pipe");
232 req->type = REQ_QUIT;
233 353
234 send_req (req); 354 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
235} 355 croak ("cannot set result pipe to nonblocking mode");
236 356
237static void 357 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
238read_write (int dowrite, int fd, off_t offset, size_t length, 358 croak ("cannot set result pipe to nonblocking mode");
239 SV *data, STRLEN dataoffset, SV *callback) 359}
240{
241 aio_req req;
242 STRLEN svlen;
243 char *svptr = SvPV (data, svlen);
244 360
245 SvUPGRADE (data, SVt_PV); 361/*****************************************************************************/
246 SvPOK_on (data); 362/* work around various missing functions */
247 363
248 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);
249 dataoffset += svlen; 425 offset += len;
250 426 count -= len;
251 if (dataoffset < 0 || dataoffset > svlen)
252 croak ("data offset outside of string");
253
254 if (dowrite)
255 { 427 }
256 /* write: check length and adjust. */ 428
257 if (length < 0 || length + dataoffset > svlen) 429 errno = 0;
258 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);
259 } 453 }
260 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 */
261 { 482 {
262 /* read: grow scalar as necessary */ 483 off_t sbytes;
263 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 )
264 } 523 {
524 /* emulate sendfile. this is a major pain in the ass */
525 char buf[4096];
526 res = 0;
265 527
266 if (length < 0) 528 while (count)
267 croak ("length must not be negative"); 529 {
530 ssize_t cnt;
531
532 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
268 533
269 Newz (0, req, 1, aio_cb); 534 if (cnt <= 0)
535 {
536 if (cnt && !res) res = -1;
537 break;
538 }
270 539
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
271 if (!req) 574 if (!dirp)
272 croak ("out of memory during aio_req allocation"); 575 return -1;
273 576
274 req->type = dowrite ? REQ_WRITE : REQ_READ; 577 names = malloc (memlen);
275 req->fd = fd;
276 req->offset = offset;
277 req->length = length;
278 req->data = SvREFCNT_inc (data);
279 req->dataptr = (char *)svptr + dataoffset;
280 req->callback = SvREFCNT_inc (callback);
281 578
282 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;
283} 619}
620
621/*****************************************************************************/
284 622
285static void * 623static void *
286aio_proc (void *thr_arg) 624aio_proc (void *thr_arg)
287{ 625{
288 aio_req req; 626 aio_req req;
… …
316 654
317 switch (type) 655 switch (type)
318 { 656 {
319 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;
320 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;
321#if SYS_readahead 659
322 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;
323#else 661 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
324 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
325#endif
326 662
327 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 663 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
328 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 664 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
329 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 665 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
330 666
331 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;
332 case REQ_CLOSE: req->result = close (req->fd); break; 668 case REQ_CLOSE: req->result = close (req->fd); break;
333 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;
334 674
675 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
335 case REQ_FSYNC: req->result = fsync (req->fd); break; 676 case REQ_FSYNC: req->result = fsync (req->fd); break;
336 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 677 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
337 678
338 case REQ_QUIT: 679 case REQ_QUIT:
339 break; 680 break;
340 681
341 default: 682 default:
… …
367 while (type != REQ_QUIT); 708 while (type != REQ_QUIT);
368 709
369 return 0; 710 return 0;
370} 711}
371 712
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
372MODULE = IO::AIO PACKAGE = IO::AIO 782MODULE = IO::AIO PACKAGE = IO::AIO
373 783
374PROTOTYPES: ENABLE 784PROTOTYPES: ENABLE
375 785
376BOOT: 786BOOT:
377{ 787{
378 if (pipe (respipe)) 788 HV *stash = gv_stashpv ("IO::AIO", 1);
379 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));
380 792
381 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 793 create_pipe ();
382 croak ("cannot set result pipe to nonblocking mode"); 794 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
383
384 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
385 croak ("cannot set result pipe to nonblocking mode");
386} 795}
387 796
388void 797void
389min_parallel(nthreads) 798min_parallel (nthreads)
390 int nthreads 799 int nthreads
391 PROTOTYPE: $ 800 PROTOTYPE: $
392 CODE:
393 while (nthreads > started)
394 start_thread ();
395 801
396void 802void
397max_parallel(nthreads) 803max_parallel (nthreads)
398 int nthreads 804 int nthreads
399 PROTOTYPE: $ 805 PROTOTYPE: $
400 CODE:
401{
402 int cur = started;
403 while (cur > nthreads)
404 {
405 end_thread ();
406 cur--;
407 }
408
409 while (started > nthreads)
410 {
411 poll_wait ();
412 poll_cb ();
413 }
414}
415 806
416int 807int
417max_outstanding(nreqs) 808max_outstanding (nreqs)
418 int nreqs 809 int nreqs
419 PROTOTYPE: $ 810 PROTOTYPE: $
420 CODE: 811 CODE:
421 RETVAL = max_outstanding; 812 RETVAL = max_outstanding;
422 max_outstanding = nreqs; 813 max_outstanding = nreqs;
423 814
424void 815void
425aio_open(pathname,flags,mode,callback=&PL_sv_undef) 816aio_open (pathname,flags,mode,callback=&PL_sv_undef)
426 SV * pathname 817 SV * pathname
427 int flags 818 int flags
428 int mode 819 int mode
429 SV * callback 820 SV * callback
430 PROTOTYPE: $$$;$ 821 PROTOTYPE: $$$;$
431 CODE: 822 CODE:
432{ 823{
433 aio_req req; 824 dREQ;
434
435 Newz (0, req, 1, aio_cb);
436
437 if (!req)
438 croak ("out of memory during aio_req allocation");
439 825
440 req->type = REQ_OPEN; 826 req->type = REQ_OPEN;
441 req->data = newSVsv (pathname); 827 req->data = newSVsv (pathname);
442 req->dataptr = SvPV_nolen (req->data); 828 req->dataptr = SvPVbyte_nolen (req->data);
443 req->fd = flags; 829 req->fd = flags;
444 req->mode = mode; 830 req->mode = mode;
445 req->callback = SvREFCNT_inc (callback);
446 831
447 send_req (req); 832 send_req (req);
448} 833}
449 834
450void 835void
451aio_close(fh,callback=&PL_sv_undef) 836aio_close (fh,callback=&PL_sv_undef)
452 InputStream fh 837 SV * fh
453 SV * callback 838 SV * callback
454 PROTOTYPE: $;$ 839 PROTOTYPE: $;$
455 ALIAS: 840 ALIAS:
456 aio_close = REQ_CLOSE 841 aio_close = REQ_CLOSE
457 aio_fsync = REQ_FSYNC 842 aio_fsync = REQ_FSYNC
458 aio_fdatasync = REQ_FDATASYNC 843 aio_fdatasync = REQ_FDATASYNC
459 CODE: 844 CODE:
460{ 845{
461 aio_req req; 846 dREQ;
462
463 Newz (0, req, 1, aio_cb);
464
465 if (!req)
466 croak ("out of memory during aio_req allocation");
467 847
468 req->type = ix; 848 req->type = ix;
849 req->fh = newSVsv (fh);
469 req->fd = PerlIO_fileno (fh); 850 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
470 req->callback = SvREFCNT_inc (callback);
471 851
472 send_req (req); 852 send_req (req);
473} 853}
474 854
475void 855void
476aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 856aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
477 InputStream fh 857 SV * fh
478 UV offset 858 UV offset
479 IV length 859 UV length
480 SV * data 860 SV * data
481 IV dataoffset 861 UV dataoffset
482 SV * callback 862 SV * callback
863 ALIAS:
864 aio_read = REQ_READ
865 aio_write = REQ_WRITE
483 PROTOTYPE: $$$$$;$ 866 PROTOTYPE: $$$$$;$
484 CODE: 867 CODE:
485 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); 868{
869 aio_req req;
870 STRLEN svlen;
871 char *svptr = SvPVbyte (data, svlen);
486 872
873 SvUPGRADE (data, SVt_PV);
874 SvPOK_on (data);
875
876 if (dataoffset < 0)
877 dataoffset += svlen;
878
879 if (dataoffset < 0 || dataoffset > svlen)
880 croak ("data offset outside of string");
881
882 if (ix == REQ_WRITE)
883 {
884 /* write: check length and adjust. */
885 if (length < 0 || length + dataoffset > svlen)
886 length = svlen - dataoffset;
887 }
888 else
889 {
890 /* read: grow scalar as necessary */
891 svptr = SvGROW (data, length + dataoffset);
892 }
893
894 if (length < 0)
895 croak ("length must not be negative");
896
897 {
898 dREQ;
899
900 req->type = ix;
901 req->fh = newSVsv (fh);
902 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
903 : IoOFP (sv_2io (fh)));
904 req->offset = offset;
905 req->length = length;
906 req->data = SvREFCNT_inc (data);
907 req->dataptr = (char *)svptr + dataoffset;
908
909 if (!SvREADONLY (data))
910 {
911 SvREADONLY_on (data);
912 req->data2ptr = (void *)data;
913 }
914
915 send_req (req);
916 }
917}
918
487void 919void
488aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 920aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
489 OutputStream fh 921 SV * out_fh
922 SV * in_fh
490 UV offset 923 UV in_offset
491 IV length 924 UV length
492 SV * data
493 IV dataoffset
494 SV * callback 925 SV * callback
495 PROTOTYPE: $$$$$;$ 926 PROTOTYPE: $$$$;$
496 CODE: 927 CODE:
497 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback); 928{
929 dREQ;
498 930
931 req->type = REQ_SENDFILE;
932 req->fh = newSVsv (out_fh);
933 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
934 req->fh2 = newSVsv (in_fh);
935 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936 req->offset = in_offset;
937 req->length = length;
938
939 send_req (req);
940}
941
499void 942void
500aio_readahead(fh,offset,length,callback=&PL_sv_undef) 943aio_readahead (fh,offset,length,callback=&PL_sv_undef)
501 InputStream fh 944 SV * fh
502 UV offset 945 UV offset
503 IV length 946 IV length
504 SV * callback 947 SV * callback
505 PROTOTYPE: $$$;$ 948 PROTOTYPE: $$$;$
506 CODE: 949 CODE:
507{ 950{
508 aio_req req; 951 dREQ;
509
510 if (length < 0)
511 croak ("length must not be negative");
512
513 Newz (0, req, 1, aio_cb);
514
515 if (!req)
516 croak ("out of memory during aio_req allocation");
517 952
518 req->type = REQ_READAHEAD; 953 req->type = REQ_READAHEAD;
954 req->fh = newSVsv (fh);
519 req->fd = PerlIO_fileno (fh); 955 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
520 req->offset = offset; 956 req->offset = offset;
521 req->length = length; 957 req->length = length;
522 req->callback = SvREFCNT_inc (callback);
523 958
524 send_req (req); 959 send_req (req);
525} 960}
526 961
527void 962void
528aio_stat(fh_or_path,callback=&PL_sv_undef) 963aio_stat (fh_or_path,callback=&PL_sv_undef)
529 SV * fh_or_path 964 SV * fh_or_path
530 SV * callback 965 SV * callback
531 ALIAS: 966 ALIAS:
532 aio_stat = REQ_STAT 967 aio_stat = REQ_STAT
533 aio_lstat = REQ_LSTAT 968 aio_lstat = REQ_LSTAT
534 CODE: 969 CODE:
535{ 970{
536 aio_req req; 971 dREQ;
537
538 Newz (0, req, 1, aio_cb);
539
540 if (!req)
541 croak ("out of memory during aio_req allocation");
542 972
543 New (0, req->statdata, 1, Stat_t); 973 New (0, req->statdata, 1, Stat_t);
544
545 if (!req->statdata) 974 if (!req->statdata)
975 {
976 free_req (req);
546 croak ("out of memory during aio_req->statdata allocation"); 977 croak ("out of memory during aio_req->statdata allocation");
978 }
547 979
548 if (SvPOK (fh_or_path)) 980 if (SvPOK (fh_or_path))
549 { 981 {
550 req->type = ix; 982 req->type = ix;
551 req->data = newSVsv (fh_or_path); 983 req->data = newSVsv (fh_or_path);
552 req->dataptr = SvPV_nolen (req->data); 984 req->dataptr = SvPVbyte_nolen (req->data);
553 } 985 }
554 else 986 else
555 { 987 {
556 req->type = REQ_FSTAT; 988 req->type = REQ_FSTAT;
989 req->fh = newSVsv (fh_or_path);
557 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 990 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
558 } 991 }
559 992
560 req->callback = SvREFCNT_inc (callback);
561
562 send_req (req); 993 send_req (req);
563} 994}
564 995
565void 996void
566aio_unlink(pathname,callback=&PL_sv_undef) 997aio_unlink (pathname,callback=&PL_sv_undef)
567 SV * pathname 998 SV * pathname
568 SV * callback 999 SV * callback
1000 ALIAS:
1001 aio_unlink = REQ_UNLINK
1002 aio_rmdir = REQ_RMDIR
1003 aio_readdir = REQ_READDIR
569 CODE: 1004 CODE:
570{ 1005{
571 aio_req req; 1006 dREQ;
572 1007
573 Newz (0, req, 1, aio_cb); 1008 req->type = ix;
574
575 if (!req)
576 croak ("out of memory during aio_req allocation");
577
578 req->type = REQ_UNLINK;
579 req->data = newSVsv (pathname); 1009 req->data = newSVsv (pathname);
580 req->dataptr = SvPV_nolen (req->data); 1010 req->dataptr = SvPVbyte_nolen (req->data);
581 req->callback = SvREFCNT_inc (callback);
582 1011
583 send_req (req); 1012 send_req (req);
584} 1013}
585 1014
586void 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
587flush() 1038flush ()
588 PROTOTYPE: 1039 PROTOTYPE:
589 CODE: 1040 CODE:
590 while (nreqs) 1041 while (nreqs)
591 { 1042 {
592 poll_wait (); 1043 poll_wait ();

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