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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.1 by root, Sun Jul 10 17:07:44 2005 UTC vs.
Revision 1.42 by root, Fri Jul 21 07:35:31 2006 UTC

1#define PERL_NO_GET_CONTEXT 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>
16#include <limits.h>
9#include <unistd.h> 17#include <unistd.h>
10#include <fcntl.h> 18#include <fcntl.h>
11#include <signal.h> 19#include <signal.h>
12#include <sched.h> 20#include <sched.h>
13#include <endian.h>
14 21
15#include <pthread.h> 22#if HAVE_SENDFILE
23# if __linux
24# include <sys/sendfile.h>
25# elif __freebsd
16#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
17 36
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 37/* used for struct dirent, AIX doesn't provide it */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 38#ifndef NAME_MAX
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 39# define NAME_MAX 4096
40#endif
21 41
22#if __i386 || __amd64
23# define STACKSIZE ( 256 * sizeof (long))
24#elif __ia64 42#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 43# define STACKSIZE 65536
26#else 44#else
27# define STACKSIZE ( 512 * sizeof (long)) 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 *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;
84static int max_outstanding = 1<<30;
60static int reqpipe[2], respipe[2]; 85static int respipe [2];
61 86
87static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
88static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
89static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90
62static aio_req qs, qe; /* queue start, queue end */ 91static volatile aio_req reqs, reqe; /* queue start, queue end */
92static volatile aio_req ress, rese; /* queue start, queue end */
63 93
64static void *aio_proc(void *arg); 94static void free_req (aio_req req)
65
66static void
67start_thread (void)
68{ 95{
69 sigset_t fullsigset, oldsigset; 96 if (req->data)
70 pthread_t tid; 97 SvREFCNT_dec (req->data);
71 pthread_attr_t attr;
72 98
73 pthread_attr_init (&attr);
74 pthread_attr_setstacksize (&attr, STACKSIZE);
75 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
76
77 sigfillset (&fullsigset);
78 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79
80 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
81 started++;
82
83 sigprocmask (SIG_SETMASK, &oldsigset, 0);
84}
85
86static void
87send_reqs (void)
88{
89 /* this write is atomic */
90 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
91 {
92 qs = qs->next;
93 if (!qs) qe = 0;
94 }
95}
96
97static void
98send_req (aio_req req)
99{
100 nreqs++;
101 req->next = 0;
102
103 if (qe)
104 {
105 qe->next = req;
106 qe = req;
107 }
108 else
109 qe = qs = req;
110
111 send_reqs ();
112}
113
114static void
115end_thread (void)
116{
117 aio_req req;
118 New (0, req, 1, aio_cb);
119 req->type = REQ_QUIT;
120
121 send_req (req);
122}
123
124static void
125read_write (pTHX_
126 int dowrite, int fd, off_t offset, size_t length,
127 SV *data, STRLEN dataoffset, SV *callback)
128{
129 aio_req req;
130 STRLEN svlen;
131 char *svptr = SvPV (data, svlen);
132
133 SvUPGRADE (data, SVt_PV);
134 SvPOK_on (data);
135
136 if (dataoffset < 0)
137 dataoffset += svlen;
138
139 if (dataoffset < 0 || dataoffset > svlen)
140 croak ("data offset outside of string");
141
142 if (dowrite)
143 {
144 /* write: check length and adjust. */
145 if (length < 0 || length + dataoffset > svlen)
146 length = svlen - dataoffset;
147 }
148 else
149 {
150 /* read: grow scalar as necessary */
151 svptr = SvGROW (data, length + dataoffset);
152 }
153
154 if (length < 0)
155 croak ("length must not be negative");
156
157 Newz (0, req, 1, aio_cb);
158
159 if (!req) 99 if (req->fh)
160 croak ("out of memory during aio_req allocation"); 100 SvREFCNT_dec (req->fh);
161 101
162 req->type = dowrite ? REQ_WRITE : REQ_READ; 102 if (req->fh2)
163 req->fd = fd; 103 SvREFCNT_dec (req->fh2);
164 req->offset = offset;
165 req->length = length;
166 req->data = SvREFCNT_inc (data);
167 req->dataptr = (char *)svptr + dataoffset;
168 req->callback = SvREFCNT_inc (callback);
169 104
170 send_req (req); 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);
171} 115}
172 116
173static void 117static void
174poll_wait () 118poll_wait ()
175{ 119{
120 if (nreqs && !ress)
121 {
176 fd_set rfd; 122 fd_set rfd;
177 FD_ZERO(&rfd); 123 FD_ZERO(&rfd);
178 FD_SET(respipe[0], &rfd); 124 FD_SET(respipe [0], &rfd);
179 125
180 select (respipe[0] + 1, &rfd, 0, 0, 0); 126 select (respipe [0] + 1, &rfd, 0, 0, 0);
127 }
181} 128}
182 129
183static int 130static int
184poll_cb (pTHX) 131poll_cb ()
185{ 132{
186 dSP; 133 dSP;
187 int count = 0; 134 int count = 0;
135 int do_croak = 0;
188 aio_req req; 136 aio_req req;
189 137
190 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 138 for (;;)
191 { 139 {
140 pthread_mutex_lock (&reslock);
141 req = ress;
142
143 if (req)
144 {
145 ress = req->next;
146
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 }
156 }
157
158 pthread_mutex_unlock (&reslock);
159
160 if (!req)
161 break;
162
192 nreqs--; 163 nreqs--;
193 164
194 if (req->type == REQ_QUIT) 165 if (req->type == REQ_QUIT)
195 started--; 166 started--;
196 else 167 else
197 { 168 {
198 int errorno = errno; 169 int errorno = errno;
199 errno = req->errorno; 170 errno = req->errorno;
200 171
201 if (req->type == REQ_READ) 172 if (req->type == REQ_READ)
202 SvCUR_set (req->data, req->dataoffset 173 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
203 + req->result > 0 ? req->result : 0);
204 174
175 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176 SvREADONLY_off (req->data);
177
205 if (req->data) 178 if (req->statdata)
206 SvREFCNT_dec (req->data);
207
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209 { 179 {
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 180 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211 PL_laststatval = req->result; 181 PL_laststatval = req->result;
212 PL_statcache = *(req->statdata); 182 PL_statcache = *(req->statdata);
213
214 Safefree (req->statdata);
215 } 183 }
216 184
185 ENTER;
217 PUSHMARK (SP); 186 PUSHMARK (SP);
187
188 if (req->type == REQ_READDIR)
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 {
218 XPUSHs (sv_2mortal (newSViv (req->result))); 213 XPUSHs (sv_2mortal (newSViv (req->result)));
214
215 if (req->type == REQ_OPEN)
216 {
217 /* convert fd to fh */
218 SV *fh;
219
220 PUTBACK;
221 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
222 SPAGAIN;
223
224 fh = SvREFCNT_inc (POPs);
225
226 PUSHMARK (SP);
227 XPUSHs (sv_2mortal (fh));
228 }
229 }
230
231 if (SvOK (req->callback))
232 {
219 PUTBACK; 233 PUTBACK;
220 call_sv (req->callback, G_VOID); 234 call_sv (req->callback, G_VOID | G_EVAL);
221 SPAGAIN; 235 SPAGAIN;
236
237 if (SvTRUE (ERRSV))
238 {
239 free_req (req);
240 croak (0);
241 }
222 242 }
223 if (req->callback) 243
224 SvREFCNT_dec (req->callback); 244 LEAVE;
225 245
226 errno = errorno; 246 errno = errorno;
227 count++; 247 count++;
228 } 248 }
229 249
230 Safefree (req); 250 free_req (req);
231 } 251 }
232
233 if (qs)
234 send_reqs ();
235 252
236 return count; 253 return count;
237} 254}
255
256static void *aio_proc(void *arg);
257
258static void
259start_thread (void)
260{
261 sigset_t fullsigset, oldsigset;
262 pthread_t tid;
263 pthread_attr_t attr;
264
265 pthread_attr_init (&attr);
266 pthread_attr_setstacksize (&attr, STACKSIZE);
267 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
268
269 sigfillset (&fullsigset);
270 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
271
272 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
273 started++;
274
275 sigprocmask (SIG_SETMASK, &oldsigset, 0);
276}
277
278static void
279send_req (aio_req req)
280{
281 while (started < wanted && nreqs >= started)
282 start_thread ();
283
284 nreqs++;
285
286 pthread_mutex_lock (&reqlock);
287
288 req->next = 0;
289
290 if (reqe)
291 {
292 reqe->next = req;
293 reqe = req;
294 }
295 else
296 reqe = reqs = req;
297
298 pthread_cond_signal (&reqwait);
299 pthread_mutex_unlock (&reqlock);
300
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)
343 {
344 poll_wait ();
345 poll_cb ();
346 }
347}
348
349static void create_pipe ()
350{
351 if (pipe (respipe))
352 croak ("unable to initialize result pipe");
353
354 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
355 croak ("cannot set result pipe to nonblocking mode");
356
357 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
358 croak ("cannot set result pipe to nonblocking mode");
359}
360
361/*****************************************************************************/
362/* work around various missing functions */
363
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);
425 offset += len;
426 count -= len;
427 }
428
429 errno = 0;
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);
453 }
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 */
482 {
483 off_t sbytes;
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 )
523 {
524 /* emulate sendfile. this is a major pain in the ass */
525 char buf[4096];
526 res = 0;
527
528 while (count)
529 {
530 ssize_t cnt;
531
532 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
533
534 if (cnt <= 0)
535 {
536 if (cnt && !res) res = -1;
537 break;
538 }
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
574 if (!dirp)
575 return -1;
576
577 names = malloc (memlen);
578
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;
619}
620
621/*****************************************************************************/
238 622
239static void * 623static void *
240aio_proc (void *thr_arg) 624aio_proc (void *thr_arg)
241{ 625{
242 aio_req req; 626 aio_req req;
627 int type;
243 628
244 /* then loop */ 629 do
245 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 630 {
631 pthread_mutex_lock (&reqlock);
632
633 for (;;)
634 {
635 req = reqs;
636
637 if (reqs)
638 {
639 reqs = reqs->next;
640 if (!reqs) reqe = 0;
641 }
642
643 if (req)
644 break;
645
646 pthread_cond_wait (&reqwait, &reqlock);
647 }
648
649 pthread_mutex_unlock (&reqlock);
246 { 650
247 errno = 0; /* strictly unnecessary */ 651 errno = 0; /* strictly unnecessary */
248 652
653 type = req->type;
654
249 switch (req->type) 655 switch (type)
250 { 656 {
251 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;
252 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;
253#if SYS_readahead 659
254 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;
255#else 661 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
256 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
257#endif
258 662
259 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 663 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
260 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 664 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
261 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 665 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
262 666
263 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;
264 case REQ_CLOSE: req->result = close (req->fd); break; 668 case REQ_CLOSE: req->result = close (req->fd); break;
265 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;
266 674
675 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
267 case REQ_FSYNC: req->result = fsync (req->fd); break; 676 case REQ_FSYNC: req->result = fsync (req->fd); break;
268 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 677 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
269 678
270 case REQ_QUIT: 679 case REQ_QUIT:
271 write (respipe[1], (void *)&req, sizeof (req)); 680 break;
272 return 0;
273 681
274 default: 682 default:
275 req->result = ENOSYS; 683 req->result = ENOSYS;
276 break; 684 break;
277 } 685 }
278 686
279 req->errorno = errno; 687 req->errorno = errno;
280 write (respipe[1], (void *)&req, sizeof (req)); 688
689 pthread_mutex_lock (&reslock);
690
691 req->next = 0;
692
693 if (rese)
694 {
695 rese->next = req;
696 rese = req;
697 }
698 else
699 {
700 rese = ress = req;
701
702 /* write a dummy byte to the pipe so fh becomes ready */
703 write (respipe [1], &respipe, 1);
704 }
705
706 pthread_mutex_unlock (&reslock);
281 } 707 }
708 while (type != REQ_QUIT);
282 709
283 return 0; 710 return 0;
284} 711}
285 712
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
286MODULE = IO::AIO PACKAGE = IO::AIO 782MODULE = IO::AIO PACKAGE = IO::AIO
287 783
784PROTOTYPES: ENABLE
785
288BOOT: 786BOOT:
289{ 787{
290 if (pipe (reqpipe) || pipe (respipe)) 788 HV *stash = gv_stashpv ("IO::AIO", 1);
291 croak ("unable to initialize request or result pipe"); 789 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
790 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
791 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
292 792
293 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) 793 create_pipe ();
294 croak ("cannot set result pipe to nonblocking mode"); 794 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
295
296 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
297 croak ("cannot set result pipe to nonblocking mode");
298} 795}
299 796
300void 797void
301min_parallel(nthreads) 798min_parallel (nthreads)
302 int nthreads 799 int nthreads
303 PROTOTYPE: $ 800 PROTOTYPE: $
304 CODE:
305 while (nthreads > started)
306 start_thread ();
307 801
308void 802void
309max_parallel(nthreads) 803max_parallel (nthreads)
310 int nthreads 804 int nthreads
311 PROTOTYPE: $ 805 PROTOTYPE: $
806
807int
808max_outstanding (nreqs)
809 int nreqs
810 PROTOTYPE: $
312 CODE: 811 CODE:
313{ 812 RETVAL = max_outstanding;
314 int cur = started; 813 max_outstanding = nreqs;
315 while (cur > nthreads)
316 {
317 end_thread ();
318 cur--;
319 }
320 814
321 while (started > nthreads)
322 {
323 poll_wait ();
324 poll_cb (aTHX);
325 }
326}
327
328void 815void
329aio_open(pathname,flags,mode,callback) 816aio_open (pathname,flags,mode,callback=&PL_sv_undef)
330 SV * pathname 817 SV * pathname
331 int flags 818 int flags
332 int mode 819 int mode
333 SV * callback 820 SV * callback
334 PROTOTYPE: $$$$ 821 PROTOTYPE: $$$;$
335 CODE: 822 CODE:
336{ 823{
337 aio_req req; 824 dREQ;
338
339 Newz (0, req, 1, aio_cb);
340
341 if (!req)
342 croak ("out of memory during aio_req allocation");
343 825
344 req->type = REQ_OPEN; 826 req->type = REQ_OPEN;
345 req->data = newSVsv (pathname); 827 req->data = newSVsv (pathname);
346 req->dataptr = SvPV_nolen (req->data); 828 req->dataptr = SvPVbyte_nolen (req->data);
347 req->fd = flags; 829 req->fd = flags;
348 req->mode = mode; 830 req->mode = mode;
349 req->callback = SvREFCNT_inc (callback);
350 831
351 send_req (req); 832 send_req (req);
352} 833}
353 834
354void 835void
355aio_close(fh,callback) 836aio_close (fh,callback=&PL_sv_undef)
356 InputStream fh 837 SV * fh
357 SV * callback 838 SV * callback
358 PROTOTYPE: $$ 839 PROTOTYPE: $;$
359 ALIAS: 840 ALIAS:
360 aio_close = REQ_CLOSE 841 aio_close = REQ_CLOSE
361 aio_fsync = REQ_FSYNC 842 aio_fsync = REQ_FSYNC
362 aio_fdatasync = REQ_FDATASYNC 843 aio_fdatasync = REQ_FDATASYNC
363 CODE: 844 CODE:
364{ 845{
846 dREQ;
847
848 req->type = ix;
849 req->fh = newSVsv (fh);
850 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
851
852 send_req (req);
853}
854
855void
856aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
857 SV * fh
858 UV offset
859 UV length
860 SV * data
861 UV dataoffset
862 SV * callback
863 ALIAS:
864 aio_read = REQ_READ
865 aio_write = REQ_WRITE
866 PROTOTYPE: $$$$$;$
867 CODE:
868{
365 aio_req req; 869 aio_req req;
870 STRLEN svlen;
871 char *svptr = SvPVbyte (data, svlen);
366 872
367 Newz (0, req, 1, aio_cb); 873 SvUPGRADE (data, SVt_PV);
874 SvPOK_on (data);
368 875
369 if (!req) 876 if (dataoffset < 0)
370 croak ("out of memory during aio_req allocation"); 877 dataoffset += svlen;
371 878
372 req->type = ix; 879 if (dataoffset < 0 || dataoffset > svlen)
373 req->fd = PerlIO_fileno (fh); 880 croak ("data offset outside of string");
374 req->callback = SvREFCNT_inc (callback);
375 881
376 send_req (req); 882 if (ix == REQ_WRITE)
377} 883 {
378 884 /* write: check length and adjust. */
379void 885 if (length < 0 || length + dataoffset > svlen)
380aio_read(fh,offset,length,data,dataoffset,callback) 886 length = svlen - dataoffset;
381 InputStream fh 887 }
382 UV offset 888 else
383 IV length 889 {
384 SV * data 890 /* read: grow scalar as necessary */
385 IV dataoffset 891 svptr = SvGROW (data, length + dataoffset);
386 SV * callback 892 }
387 PROTOTYPE: $$$$$$
388 CODE:
389 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
390
391void
392aio_write(fh,offset,length,data,dataoffset,callback)
393 OutputStream fh
394 UV offset
395 IV length
396 SV * data
397 IV dataoffset
398 SV * callback
399 PROTOTYPE: $$$$$$
400 CODE:
401 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
402
403void
404aio_readahead(fh,offset,length,callback)
405 InputStream fh
406 UV offset
407 IV length
408 SV * callback
409 PROTOTYPE: $$$$
410 CODE:
411{
412 aio_req req;
413 893
414 if (length < 0) 894 if (length < 0)
415 croak ("length must not be negative"); 895 croak ("length must not be negative");
416 896
417 Newz (0, req, 1, aio_cb); 897 {
898 dREQ;
418 899
419 if (!req) 900 req->type = ix;
420 croak ("out of memory during aio_req allocation"); 901 req->fh = newSVsv (fh);
902 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
903 : IoOFP (sv_2io (fh)));
904 req->offset = offset;
905 req->length = length;
906 req->data = SvREFCNT_inc (data);
907 req->dataptr = (char *)svptr + dataoffset;
908
909 if (!SvREADONLY (data))
910 {
911 SvREADONLY_on (data);
912 req->data2ptr = (void *)data;
913 }
914
915 send_req (req);
916 }
917}
918
919void
920aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
921 SV * out_fh
922 SV * in_fh
923 UV in_offset
924 UV length
925 SV * callback
926 PROTOTYPE: $$$$;$
927 CODE:
928{
929 dREQ;
930
931 req->type = REQ_SENDFILE;
932 req->fh = newSVsv (out_fh);
933 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
934 req->fh2 = newSVsv (in_fh);
935 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936 req->offset = in_offset;
937 req->length = length;
938
939 send_req (req);
940}
941
942void
943aio_readahead (fh,offset,length,callback=&PL_sv_undef)
944 SV * fh
945 UV offset
946 IV length
947 SV * callback
948 PROTOTYPE: $$$;$
949 CODE:
950{
951 dREQ;
421 952
422 req->type = REQ_READAHEAD; 953 req->type = REQ_READAHEAD;
954 req->fh = newSVsv (fh);
423 req->fd = PerlIO_fileno (fh); 955 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
424 req->offset = offset; 956 req->offset = offset;
425 req->length = length; 957 req->length = length;
426 req->callback = SvREFCNT_inc (callback);
427 958
428 send_req (req); 959 send_req (req);
429} 960}
430 961
431void 962void
432aio_stat(fh_or_path,callback) 963aio_stat (fh_or_path,callback=&PL_sv_undef)
433 SV * fh_or_path 964 SV * fh_or_path
434 SV * callback 965 SV * callback
435 PROTOTYPE: $$
436 ALIAS: 966 ALIAS:
967 aio_stat = REQ_STAT
437 aio_lstat = 1 968 aio_lstat = REQ_LSTAT
438 CODE: 969 CODE:
439{ 970{
440 aio_req req; 971 dREQ;
441
442 Newz (0, req, 1, aio_cb);
443
444 if (!req)
445 croak ("out of memory during aio_req allocation");
446 972
447 New (0, req->statdata, 1, Stat_t); 973 New (0, req->statdata, 1, Stat_t);
448
449 if (!req->statdata) 974 if (!req->statdata)
975 {
976 free_req (req);
450 croak ("out of memory during aio_req->statdata allocation"); 977 croak ("out of memory during aio_req->statdata allocation");
978 }
451 979
452 if (SvPOK (fh_or_path)) 980 if (SvPOK (fh_or_path))
453 { 981 {
454 req->type = ix ? REQ_LSTAT : REQ_STAT; 982 req->type = ix;
455 req->data = newSVsv (fh_or_path); 983 req->data = newSVsv (fh_or_path);
456 req->dataptr = SvPV_nolen (req->data); 984 req->dataptr = SvPVbyte_nolen (req->data);
457 } 985 }
458 else 986 else
459 { 987 {
460 req->type = REQ_FSTAT; 988 req->type = REQ_FSTAT;
989 req->fh = newSVsv (fh_or_path);
461 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 990 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
462 } 991 }
463 992
464 req->callback = SvREFCNT_inc (callback);
465
466 send_req (req); 993 send_req (req);
467} 994}
468 995
469void 996void
470aio_unlink(pathname,callback) 997aio_unlink (pathname,callback=&PL_sv_undef)
471 SV * pathname 998 SV * pathname
472 SV * callback 999 SV * callback
473 PROTOTYPE: $$ 1000 ALIAS:
1001 aio_unlink = REQ_UNLINK
1002 aio_rmdir = REQ_RMDIR
1003 aio_readdir = REQ_READDIR
474 CODE: 1004 CODE:
475{ 1005{
476 aio_req req; 1006 dREQ;
477 1007
478 Newz (0, req, 1, aio_cb); 1008 req->type = ix;
479
480 if (!req)
481 croak ("out of memory during aio_req allocation");
482
483 req->type = REQ_UNLINK;
484 req->data = newSVsv (pathname); 1009 req->data = newSVsv (pathname);
485 req->dataptr = SvPV_nolen (req->data); 1010 req->dataptr = SvPVbyte_nolen (req->data);
486 req->callback = SvREFCNT_inc (callback);
487 1011
488 send_req (req); 1012 send_req (req);
489} 1013}
1014
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
1037#if 0
1038
1039# undocumented, because it does not cancel active requests
1040void
1041cancel_most_requests ()
1042 PROTOTYPE:
1043 CODE:
1044{
1045 aio_req *req;
1046
1047 pthread_mutex_lock (&reqlock);
1048 for (req = reqs; req; req = req->next)
1049 req->flags |= 1;
1050 pthread_mutex_unlock (&reqlock);
1051
1052 pthread_mutex_lock (&reslock);
1053 for (req = ress; req; req = req->next)
1054 req->flags |= 1;
1055 pthread_mutex_unlock (&reslock);
1056}
1057
1058#endif
1059
1060void
1061flush ()
1062 PROTOTYPE:
1063 CODE:
1064 while (nreqs)
1065 {
1066 poll_wait ();
1067 poll_cb ();
1068 }
1069
1070void
1071poll()
1072 PROTOTYPE:
1073 CODE:
1074 if (nreqs)
1075 {
1076 poll_wait ();
1077 poll_cb ();
1078 }
490 1079
491int 1080int
492poll_fileno() 1081poll_fileno()
493 PROTOTYPE: 1082 PROTOTYPE:
494 CODE: 1083 CODE:
495 RETVAL = respipe[0]; 1084 RETVAL = respipe [0];
496 OUTPUT: 1085 OUTPUT:
497 RETVAL 1086 RETVAL
498 1087
499int 1088int
500poll_cb(...) 1089poll_cb(...)
501 PROTOTYPE: 1090 PROTOTYPE:
502 CODE: 1091 CODE:
503 RETVAL = poll_cb (aTHX); 1092 RETVAL = poll_cb ();
504 OUTPUT: 1093 OUTPUT:
505 RETVAL 1094 RETVAL
506 1095
507void 1096void
508poll_wait() 1097poll_wait()
509 PROTOTYPE: 1098 PROTOTYPE:
510 CODE: 1099 CODE:
1100 if (nreqs)
511 poll_wait (); 1101 poll_wait ();
512 1102
513int 1103int
514nreqs() 1104nreqs()
515 PROTOTYPE: 1105 PROTOTYPE:
516 CODE: 1106 CODE:

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