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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.2 by root, Sun Jul 10 18:16:49 2005 UTC vs.
Revision 1.37 by root, Tue Aug 23 12:37:19 2005 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>
7#include <sys/types.h> 13#include <sys/types.h>
8#include <sys/stat.h> 14#include <sys/stat.h>
15#include <limits.h>
9#include <unistd.h> 16#include <unistd.h>
10#include <fcntl.h> 17#include <fcntl.h>
11#include <signal.h> 18#include <signal.h>
12#include <sched.h> 19#include <sched.h>
13#include <endian.h>
14 20
15#include <pthread.h> 21#if HAVE_SENDFILE
22# if __linux
23# include <sys/sendfile.h>
24# elif __freebsd
16#include <sys/syscall.h> 25# include <sys/socket.h>
26# include <sys/uio.h>
27# elif __hpux
28# include <sys/socket.h>
29# elif __solaris /* not yet */
30# include <sys/sendfile.h>
31# else
32# error sendfile support requested but not available
33# endif
34#endif
17 35
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
21
22#if __i386 || __amd64
23# define STACKSIZE ( 256 * sizeof (long))
24#elif __ia64 36#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 37# define STACKSIZE 65536
26#else 38#else
27# define STACKSIZE ( 512 * sizeof (long)) 39# define STACKSIZE 8192
28#endif 40#endif
29 41
30enum { 42enum {
31 REQ_QUIT, 43 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 44 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 45 REQ_READ, REQ_WRITE, REQ_READAHEAD,
46 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 47 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 48 REQ_FSYNC, REQ_FDATASYNC,
49 REQ_UNLINK, REQ_RMDIR,
50 REQ_READDIR,
51 REQ_SYMLINK,
36}; 52};
37 53
38typedef struct aio_cb { 54typedef struct aio_cb {
39 struct aio_cb *next; 55 struct aio_cb *volatile next;
40 56
41 int type; 57 int type;
42 58
59 /* should receive a cleanup, with unions */
43 int fd; 60 int fd, fd2;
44 off_t offset; 61 off_t offset;
45 size_t length; 62 size_t length;
46 ssize_t result; 63 ssize_t result;
47 mode_t mode; /* open */ 64 mode_t mode; /* open */
48 int errorno; 65 int errorno;
49 SV *data, *callback; 66 SV *data, *callback;
50 void *dataptr; 67 SV *fh, *fh2;
68 void *dataptr, *data2ptr;
51 STRLEN dataoffset; 69 STRLEN dataoffset;
52 70
53 Stat_t *statdata; 71 Stat_t *statdata;
54} aio_cb; 72} aio_cb;
55 73
56typedef aio_cb *aio_req; 74typedef aio_cb *aio_req;
57 75
58static int started; 76static int started, wanted;
59static int nreqs; 77static volatile int nreqs;
78static int max_outstanding = 1<<30;
60static int reqpipe[2], respipe[2]; 79static int respipe [2];
61 80
81static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
82static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
83static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
84
62static aio_req qs, qe; /* queue start, queue end */ 85static volatile aio_req reqs, reqe; /* queue start, queue end */
86static volatile aio_req ress, rese; /* queue start, queue end */
63 87
64static void *aio_proc(void *arg); 88static void free_req (aio_req req)
65
66static void
67start_thread (void)
68{ 89{
69 sigset_t fullsigset, oldsigset; 90 if (req->data)
70 pthread_t tid; 91 SvREFCNT_dec (req->data);
71 pthread_attr_t attr;
72 92
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) 93 if (req->fh)
160 croak ("out of memory during aio_req allocation"); 94 SvREFCNT_dec (req->fh);
161 95
162 req->type = dowrite ? REQ_WRITE : REQ_READ; 96 if (req->fh2)
163 req->fd = fd; 97 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 98
170 send_req (req); 99 if (req->statdata)
100 Safefree (req->statdata);
101
102 if (req->callback)
103 SvREFCNT_dec (req->callback);
104
105 if (req->type == REQ_READDIR && req->result >= 0)
106 free (req->data2ptr);
107
108 Safefree (req);
171} 109}
172 110
173static void 111static void
174poll_wait () 112poll_wait ()
175{ 113{
114 if (nreqs && !ress)
115 {
176 fd_set rfd; 116 fd_set rfd;
177 FD_ZERO(&rfd); 117 FD_ZERO(&rfd);
178 FD_SET(respipe[0], &rfd); 118 FD_SET(respipe [0], &rfd);
179 119
180 select (respipe[0] + 1, &rfd, 0, 0, 0); 120 select (respipe [0] + 1, &rfd, 0, 0, 0);
121 }
181} 122}
182 123
183static int 124static int
184poll_cb (pTHX) 125poll_cb ()
185{ 126{
186 dSP; 127 dSP;
187 int count = 0; 128 int count = 0;
129 int do_croak = 0;
188 aio_req req; 130 aio_req req;
189 131
190 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 132 for (;;)
191 { 133 {
134 pthread_mutex_lock (&reslock);
135 req = ress;
136
137 if (req)
138 {
139 ress = req->next;
140
141 if (!ress)
142 {
143 /* read any signals sent by the worker threads */
144 char buf [32];
145 while (read (respipe [0], buf, 32) == 32)
146 ;
147
148 rese = 0;
149 }
150 }
151
152 pthread_mutex_unlock (&reslock);
153
154 if (!req)
155 break;
156
192 nreqs--; 157 nreqs--;
193 158
194 if (req->type == REQ_QUIT) 159 if (req->type == REQ_QUIT)
195 started--; 160 started--;
196 else 161 else
197 { 162 {
198 int errorno = errno; 163 int errorno = errno;
199 errno = req->errorno; 164 errno = req->errorno;
200 165
201 if (req->type == REQ_READ) 166 if (req->type == REQ_READ)
202 SvCUR_set (req->data, req->dataoffset 167 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
203 + req->result > 0 ? req->result : 0);
204 168
169 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170 SvREADONLY_off (req->data);
171
205 if (req->data) 172 if (req->statdata)
206 SvREFCNT_dec (req->data);
207
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209 { 173 {
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 174 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211 PL_laststatval = req->result; 175 PL_laststatval = req->result;
212 PL_statcache = *(req->statdata); 176 PL_statcache = *(req->statdata);
213
214 Safefree (req->statdata);
215 } 177 }
216 178
179 ENTER;
217 PUSHMARK (SP); 180 PUSHMARK (SP);
218 XPUSHs (sv_2mortal (newSViv (req->result)));
219 181
220 if (req->type == REQ_OPEN) 182 if (req->type == REQ_READDIR)
221 { 183 {
184 SV *rv = &PL_sv_undef;
185
186 if (req->result >= 0)
187 {
188 char *buf = req->data2ptr;
189 AV *av = newAV ();
190
191 while (req->result)
192 {
193 SV *sv = newSVpv (buf, 0);
194
195 av_push (av, sv);
196 buf += SvCUR (sv) + 1;
197 req->result--;
198 }
199
200 rv = sv_2mortal (newRV_noinc ((SV *)av));
201 }
202
203 XPUSHs (rv);
204 }
205 else
206 {
207 XPUSHs (sv_2mortal (newSViv (req->result)));
208
209 if (req->type == REQ_OPEN)
210 {
222 /* convert fd to fh */ 211 /* convert fd to fh */
223 SV *fh; 212 SV *fh;
224 213
214 PUTBACK;
215 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216 SPAGAIN;
217
218 fh = SvREFCNT_inc (POPs);
219
220 PUSHMARK (SP);
221 XPUSHs (sv_2mortal (fh));
222 }
223 }
224
225 if (SvOK (req->callback))
226 {
225 PUTBACK; 227 PUTBACK;
226 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 228 call_sv (req->callback, G_VOID | G_EVAL);
227 SPAGAIN; 229 SPAGAIN;
228 230
229 fh = POPs; 231 if (SvTRUE (ERRSV))
230 232 {
231 PUSHMARK (SP); 233 free_req (req);
232 XPUSHs (fh); 234 croak (0);
235 }
233 } 236 }
234 237
235 PUTBACK;
236 call_sv (req->callback, G_VOID | G_EVAL);
237 SPAGAIN;
238 238 LEAVE;
239 if (req->callback)
240 SvREFCNT_dec (req->callback);
241 239
242 errno = errorno; 240 errno = errorno;
243 count++; 241 count++;
244 } 242 }
245 243
246 Safefree (req); 244 free_req (req);
247 } 245 }
248
249 if (qs)
250 send_reqs ();
251 246
252 return count; 247 return count;
253} 248}
249
250static void *aio_proc(void *arg);
251
252static void
253start_thread (void)
254{
255 sigset_t fullsigset, oldsigset;
256 pthread_t tid;
257 pthread_attr_t attr;
258
259 pthread_attr_init (&attr);
260 pthread_attr_setstacksize (&attr, STACKSIZE);
261 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263 sigfillset (&fullsigset);
264 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267 started++;
268
269 sigprocmask (SIG_SETMASK, &oldsigset, 0);
270}
271
272static void
273send_req (aio_req req)
274{
275 while (started < wanted && nreqs >= started)
276 start_thread ();
277
278 nreqs++;
279
280 pthread_mutex_lock (&reqlock);
281
282 req->next = 0;
283
284 if (reqe)
285 {
286 reqe->next = req;
287 reqe = req;
288 }
289 else
290 reqe = reqs = req;
291
292 pthread_cond_signal (&reqwait);
293 pthread_mutex_unlock (&reqlock);
294
295 if (nreqs > max_outstanding)
296 for (;;)
297 {
298 poll_cb ();
299
300 if (nreqs <= max_outstanding)
301 break;
302
303 poll_wait ();
304 }
305}
306
307static void
308end_thread (void)
309{
310 aio_req req;
311 Newz (0, req, 1, aio_cb);
312 req->type = REQ_QUIT;
313
314 send_req (req);
315}
316
317static void min_parallel (int nthreads)
318{
319 if (wanted < nthreads)
320 wanted = nthreads;
321}
322
323static void max_parallel (int nthreads)
324{
325 int cur = started;
326
327 if (wanted > nthreads)
328 wanted = nthreads;
329
330 while (cur > wanted)
331 {
332 end_thread ();
333 cur--;
334 }
335
336 while (started > wanted)
337 {
338 poll_wait ();
339 poll_cb ();
340 }
341}
342
343static void create_pipe ()
344{
345 if (pipe (respipe))
346 croak ("unable to initialize result pipe");
347
348 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
349 croak ("cannot set result pipe to nonblocking mode");
350
351 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
352 croak ("cannot set result pipe to nonblocking mode");
353}
354
355/*****************************************************************************/
356/* work around various missing functions */
357
358#if !HAVE_PREADWRITE
359# define pread aio_pread
360# define pwrite aio_pwrite
361
362/*
363 * make our pread/pwrite safe against themselves, but not against
364 * normal read/write by using a mutex. slows down execution a lot,
365 * but that's your problem, not mine.
366 */
367static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368
369static ssize_t
370pread (int fd, void *buf, size_t count, off_t offset)
371{
372 ssize_t res;
373 off_t ooffset;
374
375 pthread_mutex_lock (&preadwritelock);
376 ooffset = lseek (fd, 0, SEEK_CUR);
377 lseek (fd, offset, SEEK_SET);
378 res = read (fd, buf, count);
379 lseek (fd, ooffset, SEEK_SET);
380 pthread_mutex_unlock (&preadwritelock);
381
382 return res;
383}
384
385static ssize_t
386pwrite (int fd, void *buf, size_t count, off_t offset)
387{
388 ssize_t res;
389 off_t ooffset;
390
391 pthread_mutex_lock (&preadwritelock);
392 ooffset = lseek (fd, 0, SEEK_CUR);
393 lseek (fd, offset, SEEK_SET);
394 res = write (fd, buf, count);
395 lseek (fd, offset, SEEK_SET);
396 pthread_mutex_unlock (&preadwritelock);
397
398 return res;
399}
400#endif
401
402#if !HAVE_FDATASYNC
403# define fdatasync fsync
404#endif
405
406#if !HAVE_READAHEAD
407# define readahead aio_readahead
408
409static ssize_t
410readahead (int fd, off_t offset, size_t count)
411{
412 char readahead_buf[4096];
413
414 while (count > 0)
415 {
416 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
417
418 pread (fd, readahead_buf, len, offset);
419 offset += len;
420 count -= len;
421 }
422
423 errno = 0;
424}
425#endif
426
427#if !HAVE_READDIR_R
428# define readdir_r aio_readdir_r
429
430static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431
432static int
433readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434{
435 struct dirent *e;
436 int errorno;
437
438 pthread_mutex_lock (&readdirlock);
439
440 e = readdir (dirp);
441 errorno = errno;
442
443 if (e)
444 {
445 *res = ent;
446 strcpy (ent->d_name, e->d_name);
447 }
448 else
449 *res = 0;
450
451 pthread_mutex_unlock (&readdirlock);
452
453 errno = errorno;
454 return e ? 0 : -1;
455}
456#endif
457
458/* sendfile always needs emulation */
459static ssize_t
460sendfile_ (int ofd, int ifd, off_t offset, size_t count)
461{
462 ssize_t res;
463
464 if (!count)
465 return 0;
466
467#if HAVE_SENDFILE
468# if __linux
469 res = sendfile (ofd, ifd, &offset, count);
470
471# elif __freebsd
472 /*
473 * Of course, the freebsd sendfile is a dire hack with no thoughts
474 * wasted on making it similar to other I/O functions.
475 */
476 {
477 off_t sbytes;
478 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479
480 if (res < 0 && sbytes)
481 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
482 res = sbytes;
483 }
484
485# elif __hpux
486 res = sendfile (ofd, ifd, offset, count, 0, 0);
487
488# elif __solaris
489 {
490 struct sendfilevec vec;
491 size_t sbytes;
492
493 vec.sfv_fd = ifd;
494 vec.sfv_flag = 0;
495 vec.sfv_off = offset;
496 vec.sfv_len = count;
497
498 res = sendfilev (ofd, &vec, 1, &sbytes);
499
500 if (res < 0 && sbytes)
501 res = sbytes;
502 }
503
504# else
505 res = -1;
506 errno = ENOSYS;
507# endif
508#endif
509
510 if (res < 0
511 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
512#if __solaris
513 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
514#endif
515 )
516 )
517 {
518 /* emulate sendfile. this is a major pain in the ass */
519 char buf[4096];
520 res = 0;
521
522 for (;;)
523 {
524 ssize_t cnt;
525
526 cnt = pread (ifd, buf, 4096, offset);
527
528 if (cnt <= 0)
529 {
530 if (cnt && !res) res = -1;
531 break;
532 }
533
534 cnt = write (ofd, buf, cnt);
535
536 if (cnt <= 0)
537 {
538 if (cnt && !res) res = -1;
539 break;
540 }
541
542 offset += cnt;
543 res += cnt;
544 }
545 }
546
547 return res;
548}
549
550/* read a full directory */
551static int
552scandir_ (const char *path, void **namesp)
553{
554 DIR *dirp = opendir (path);
555 union
556 {
557 struct dirent d;
558 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
559 } u;
560 struct dirent *entp;
561 char *name, *names;
562 int memlen = 4096;
563 int memofs = 0;
564 int res = 0;
565 int errorno;
566
567 if (!dirp)
568 return -1;
569
570 names = malloc (memlen);
571
572 for (;;)
573 {
574 errno = 0, readdir_r (dirp, &u.d, &entp);
575
576 if (!entp)
577 break;
578
579 name = entp->d_name;
580
581 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
582 {
583 int len = strlen (name) + 1;
584
585 res++;
586
587 while (memofs + len > memlen)
588 {
589 memlen *= 2;
590 names = realloc (names, memlen);
591 if (!names)
592 break;
593 }
594
595 memcpy (names + memofs, name, len);
596 memofs += len;
597 }
598 }
599
600 errorno = errno;
601 closedir (dirp);
602
603 if (errorno)
604 {
605 free (names);
606 errno = errorno;
607 res = -1;
608 }
609
610 *namesp = (void *)names;
611 return res;
612}
613
614/*****************************************************************************/
254 615
255static void * 616static void *
256aio_proc (void *thr_arg) 617aio_proc (void *thr_arg)
257{ 618{
258 aio_req req; 619 aio_req req;
620 int type;
259 621
260 /* then loop */ 622 do
261 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 623 {
624 pthread_mutex_lock (&reqlock);
625
626 for (;;)
627 {
628 req = reqs;
629
630 if (reqs)
631 {
632 reqs = reqs->next;
633 if (!reqs) reqe = 0;
634 }
635
636 if (req)
637 break;
638
639 pthread_cond_wait (&reqwait, &reqlock);
640 }
641
642 pthread_mutex_unlock (&reqlock);
262 { 643
263 errno = 0; /* strictly unnecessary */ 644 errno = 0; /* strictly unnecessary */
264 645
646 type = req->type;
647
265 switch (req->type) 648 switch (type)
266 { 649 {
267 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 650 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
268 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 651 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
269#if SYS_readahead 652
270 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 653 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
271#else 654 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
272 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
273#endif
274 655
275 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 656 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
276 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 657 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
277 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 658 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
278 659
279 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 660 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
280 case REQ_CLOSE: req->result = close (req->fd); break; 661 case REQ_CLOSE: req->result = close (req->fd); break;
281 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 662 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
663 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
664 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
282 665
666 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
283 case REQ_FSYNC: req->result = fsync (req->fd); break; 667 case REQ_FSYNC: req->result = fsync (req->fd); break;
284 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 668 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
285 669
286 case REQ_QUIT: 670 case REQ_QUIT:
287 write (respipe[1], (void *)&req, sizeof (req)); 671 break;
288 return 0;
289 672
290 default: 673 default:
291 req->result = ENOSYS; 674 req->result = ENOSYS;
292 break; 675 break;
293 } 676 }
294 677
295 req->errorno = errno; 678 req->errorno = errno;
296 write (respipe[1], (void *)&req, sizeof (req)); 679
680 pthread_mutex_lock (&reslock);
681
682 req->next = 0;
683
684 if (rese)
685 {
686 rese->next = req;
687 rese = req;
688 }
689 else
690 {
691 rese = ress = req;
692
693 /* write a dummy byte to the pipe so fh becomes ready */
694 write (respipe [1], &respipe, 1);
695 }
696
697 pthread_mutex_unlock (&reslock);
297 } 698 }
699 while (type != REQ_QUIT);
298 700
299 return 0; 701 return 0;
300} 702}
301 703
704/*****************************************************************************/
705
706static void atfork_prepare (void)
707{
708 pthread_mutex_lock (&reqlock);
709 pthread_mutex_lock (&reslock);
710#if !HAVE_PREADWRITE
711 pthread_mutex_lock (&preadwritelock);
712#endif
713#if !HAVE_READDIR_R
714 pthread_mutex_lock (&readdirlock);
715#endif
716}
717
718static void atfork_parent (void)
719{
720#if !HAVE_READDIR_R
721 pthread_mutex_unlock (&readdirlock);
722#endif
723#if !HAVE_PREADWRITE
724 pthread_mutex_unlock (&preadwritelock);
725#endif
726 pthread_mutex_unlock (&reslock);
727 pthread_mutex_unlock (&reqlock);
728}
729
730static void atfork_child (void)
731{
732 aio_req prv;
733
734 started = 0;
735
736 while (reqs)
737 {
738 prv = reqs;
739 reqs = prv->next;
740 free_req (prv);
741 }
742
743 reqs = reqe = 0;
744
745 while (ress)
746 {
747 prv = ress;
748 ress = prv->next;
749 free_req (prv);
750 }
751
752 ress = rese = 0;
753
754 close (respipe [0]);
755 close (respipe [1]);
756 create_pipe ();
757
758 atfork_parent ();
759}
760
761#define dREQ \
762 aio_req req; \
763 \
764 if (SvOK (callback) && !SvROK (callback)) \
765 croak ("clalback must be undef or of reference type"); \
766 \
767 Newz (0, req, 1, aio_cb); \
768 if (!req) \
769 croak ("out of memory during aio_req allocation"); \
770 \
771 req->callback = newSVsv (callback);
772
302MODULE = IO::AIO PACKAGE = IO::AIO 773MODULE = IO::AIO PACKAGE = IO::AIO
303 774
775PROTOTYPES: ENABLE
776
304BOOT: 777BOOT:
305{ 778{
306 if (pipe (reqpipe) || pipe (respipe)) 779 create_pipe ();
307 croak ("unable to initialize request or result pipe"); 780 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
308
309 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))
310 croak ("cannot set result pipe to nonblocking mode");
311
312 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
313 croak ("cannot set result pipe to nonblocking mode");
314} 781}
315 782
316void 783void
317min_parallel(nthreads) 784min_parallel(nthreads)
318 int nthreads 785 int nthreads
319 PROTOTYPE: $ 786 PROTOTYPE: $
320 CODE:
321 while (nthreads > started)
322 start_thread ();
323 787
324void 788void
325max_parallel(nthreads) 789max_parallel(nthreads)
326 int nthreads 790 int nthreads
327 PROTOTYPE: $ 791 PROTOTYPE: $
792
793int
794max_outstanding(nreqs)
795 int nreqs
796 PROTOTYPE: $
328 CODE: 797 CODE:
329{ 798 RETVAL = max_outstanding;
330 int cur = started; 799 max_outstanding = nreqs;
331 while (cur > nthreads)
332 {
333 end_thread ();
334 cur--;
335 }
336 800
337 while (started > nthreads)
338 {
339 poll_wait ();
340 poll_cb (aTHX);
341 }
342}
343
344void 801void
345aio_open(pathname,flags,mode,callback) 802aio_open(pathname,flags,mode,callback=&PL_sv_undef)
346 SV * pathname 803 SV * pathname
347 int flags 804 int flags
348 int mode 805 int mode
349 SV * callback 806 SV * callback
350 PROTOTYPE: $$$$ 807 PROTOTYPE: $$$;$
351 CODE: 808 CODE:
352{ 809{
353 aio_req req; 810 dREQ;
354
355 Newz (0, req, 1, aio_cb);
356
357 if (!req)
358 croak ("out of memory during aio_req allocation");
359 811
360 req->type = REQ_OPEN; 812 req->type = REQ_OPEN;
361 req->data = newSVsv (pathname); 813 req->data = newSVsv (pathname);
362 req->dataptr = SvPV_nolen (req->data); 814 req->dataptr = SvPVbyte_nolen (req->data);
363 req->fd = flags; 815 req->fd = flags;
364 req->mode = mode; 816 req->mode = mode;
365 req->callback = SvREFCNT_inc (callback);
366 817
367 send_req (req); 818 send_req (req);
368} 819}
369 820
370void 821void
371aio_close(fh,callback) 822aio_close(fh,callback=&PL_sv_undef)
372 InputStream fh 823 SV * fh
373 SV * callback 824 SV * callback
374 PROTOTYPE: $$ 825 PROTOTYPE: $;$
375 ALIAS: 826 ALIAS:
376 aio_close = REQ_CLOSE 827 aio_close = REQ_CLOSE
377 aio_fsync = REQ_FSYNC 828 aio_fsync = REQ_FSYNC
378 aio_fdatasync = REQ_FDATASYNC 829 aio_fdatasync = REQ_FDATASYNC
379 CODE: 830 CODE:
380{ 831{
832 dREQ;
833
834 req->type = ix;
835 req->fh = newSVsv (fh);
836 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
837
838 send_req (req);
839}
840
841void
842aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
843 SV * fh
844 UV offset
845 UV length
846 SV * data
847 UV dataoffset
848 SV * callback
849 ALIAS:
850 aio_read = REQ_READ
851 aio_write = REQ_WRITE
852 PROTOTYPE: $$$$$;$
853 CODE:
854{
381 aio_req req; 855 aio_req req;
856 STRLEN svlen;
857 char *svptr = SvPVbyte (data, svlen);
382 858
383 Newz (0, req, 1, aio_cb); 859 SvUPGRADE (data, SVt_PV);
860 SvPOK_on (data);
384 861
385 if (!req) 862 if (dataoffset < 0)
386 croak ("out of memory during aio_req allocation"); 863 dataoffset += svlen;
387 864
388 req->type = ix; 865 if (dataoffset < 0 || dataoffset > svlen)
389 req->fd = PerlIO_fileno (fh); 866 croak ("data offset outside of string");
390 req->callback = SvREFCNT_inc (callback);
391 867
392 send_req (req); 868 if (ix == REQ_WRITE)
393} 869 {
394 870 /* write: check length and adjust. */
395void 871 if (length < 0 || length + dataoffset > svlen)
396aio_read(fh,offset,length,data,dataoffset,callback) 872 length = svlen - dataoffset;
397 InputStream fh 873 }
398 UV offset 874 else
399 IV length 875 {
400 SV * data 876 /* read: grow scalar as necessary */
401 IV dataoffset 877 svptr = SvGROW (data, length + dataoffset);
402 SV * callback 878 }
403 PROTOTYPE: $$$$$$
404 CODE:
405 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407void
408aio_write(fh,offset,length,data,dataoffset,callback)
409 OutputStream fh
410 UV offset
411 IV length
412 SV * data
413 IV dataoffset
414 SV * callback
415 PROTOTYPE: $$$$$$
416 CODE:
417 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
418
419void
420aio_readahead(fh,offset,length,callback)
421 InputStream fh
422 UV offset
423 IV length
424 SV * callback
425 PROTOTYPE: $$$$
426 CODE:
427{
428 aio_req req;
429 879
430 if (length < 0) 880 if (length < 0)
431 croak ("length must not be negative"); 881 croak ("length must not be negative");
432 882
433 Newz (0, req, 1, aio_cb); 883 {
884 dREQ;
434 885
435 if (!req) 886 req->type = ix;
436 croak ("out of memory during aio_req allocation"); 887 req->fh = newSVsv (fh);
888 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
889 : IoOFP (sv_2io (fh)));
890 req->offset = offset;
891 req->length = length;
892 req->data = SvREFCNT_inc (data);
893 req->dataptr = (char *)svptr + dataoffset;
894
895 if (!SvREADONLY (data))
896 {
897 SvREADONLY_on (data);
898 req->data2ptr = (void *)data;
899 }
900
901 send_req (req);
902 }
903}
904
905void
906aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
907 SV * out_fh
908 SV * in_fh
909 UV in_offset
910 UV length
911 SV * callback
912 PROTOTYPE: $$$$;$
913 CODE:
914{
915 dREQ;
916
917 req->type = REQ_SENDFILE;
918 req->fh = newSVsv (out_fh);
919 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
920 req->fh2 = newSVsv (in_fh);
921 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
922 req->offset = in_offset;
923 req->length = length;
924
925 send_req (req);
926}
927
928void
929aio_readahead(fh,offset,length,callback=&PL_sv_undef)
930 SV * fh
931 UV offset
932 IV length
933 SV * callback
934 PROTOTYPE: $$$;$
935 CODE:
936{
937 dREQ;
437 938
438 req->type = REQ_READAHEAD; 939 req->type = REQ_READAHEAD;
940 req->fh = newSVsv (fh);
439 req->fd = PerlIO_fileno (fh); 941 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
440 req->offset = offset; 942 req->offset = offset;
441 req->length = length; 943 req->length = length;
442 req->callback = SvREFCNT_inc (callback);
443 944
444 send_req (req); 945 send_req (req);
445} 946}
446 947
447void 948void
448aio_stat(fh_or_path,callback) 949aio_stat(fh_or_path,callback=&PL_sv_undef)
449 SV * fh_or_path 950 SV * fh_or_path
450 SV * callback 951 SV * callback
451 PROTOTYPE: $$
452 ALIAS: 952 ALIAS:
953 aio_stat = REQ_STAT
453 aio_lstat = 1 954 aio_lstat = REQ_LSTAT
454 CODE: 955 CODE:
455{ 956{
456 aio_req req; 957 dREQ;
457
458 Newz (0, req, 1, aio_cb);
459
460 if (!req)
461 croak ("out of memory during aio_req allocation");
462 958
463 New (0, req->statdata, 1, Stat_t); 959 New (0, req->statdata, 1, Stat_t);
464
465 if (!req->statdata) 960 if (!req->statdata)
961 {
962 free_req (req);
466 croak ("out of memory during aio_req->statdata allocation"); 963 croak ("out of memory during aio_req->statdata allocation");
964 }
467 965
468 if (SvPOK (fh_or_path)) 966 if (SvPOK (fh_or_path))
469 { 967 {
470 req->type = ix ? REQ_LSTAT : REQ_STAT; 968 req->type = ix;
471 req->data = newSVsv (fh_or_path); 969 req->data = newSVsv (fh_or_path);
472 req->dataptr = SvPV_nolen (req->data); 970 req->dataptr = SvPVbyte_nolen (req->data);
473 } 971 }
474 else 972 else
475 { 973 {
476 req->type = REQ_FSTAT; 974 req->type = REQ_FSTAT;
975 req->fh = newSVsv (fh_or_path);
477 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 976 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
478 } 977 }
479 978
480 req->callback = SvREFCNT_inc (callback);
481
482 send_req (req); 979 send_req (req);
483} 980}
484 981
485void 982void
486aio_unlink(pathname,callback) 983aio_unlink(pathname,callback=&PL_sv_undef)
487 SV * pathname 984 SV * pathname
488 SV * callback 985 SV * callback
489 PROTOTYPE: $$ 986 ALIAS:
987 aio_unlink = REQ_UNLINK
988 aio_rmdir = REQ_RMDIR
490 CODE: 989 CODE:
491{ 990{
492 aio_req req; 991 dREQ;
493 992
494 Newz (0, req, 1, aio_cb); 993 req->type = ix;
495
496 if (!req)
497 croak ("out of memory during aio_req allocation");
498
499 req->type = REQ_UNLINK;
500 req->data = newSVsv (pathname); 994 req->data = newSVsv (pathname);
501 req->dataptr = SvPV_nolen (req->data); 995 req->dataptr = SvPVbyte_nolen (req->data);
502 req->callback = SvREFCNT_inc (callback);
503 996
504 send_req (req); 997 send_req (req);
505} 998}
999
1000void
1001aio_symlink(oldpath,newpath,callback=&PL_sv_undef)
1002 SV * oldpath
1003 SV * newpath
1004 SV * callback
1005 CODE:
1006{
1007 dREQ;
1008
1009 req->type = REQ_SYMLINK;
1010 req->fh = newSVsv (oldpath);
1011 req->data2ptr = SvPVbyte_nolen (req->fh);
1012 req->data = newSVsv (newpath);
1013 req->dataptr = SvPVbyte_nolen (req->data);
1014
1015 send_req (req);
1016}
1017
1018void
1019aio_readdir(pathname,callback=&PL_sv_undef)
1020 SV * pathname
1021 SV * callback
1022 CODE:
1023{
1024 dREQ;
1025
1026 req->type = REQ_READDIR;
1027 req->data = newSVsv (pathname);
1028 req->dataptr = SvPVbyte_nolen (req->data);
1029
1030 send_req (req);
1031}
1032
1033void
1034flush()
1035 PROTOTYPE:
1036 CODE:
1037 while (nreqs)
1038 {
1039 poll_wait ();
1040 poll_cb ();
1041 }
1042
1043void
1044poll()
1045 PROTOTYPE:
1046 CODE:
1047 if (nreqs)
1048 {
1049 poll_wait ();
1050 poll_cb ();
1051 }
506 1052
507int 1053int
508poll_fileno() 1054poll_fileno()
509 PROTOTYPE: 1055 PROTOTYPE:
510 CODE: 1056 CODE:
511 RETVAL = respipe[0]; 1057 RETVAL = respipe [0];
512 OUTPUT: 1058 OUTPUT:
513 RETVAL 1059 RETVAL
514 1060
515int 1061int
516poll_cb(...) 1062poll_cb(...)
517 PROTOTYPE: 1063 PROTOTYPE:
518 CODE: 1064 CODE:
519 RETVAL = poll_cb (aTHX); 1065 RETVAL = poll_cb ();
520 OUTPUT: 1066 OUTPUT:
521 RETVAL 1067 RETVAL
522 1068
523void 1069void
524poll_wait() 1070poll_wait()
525 PROTOTYPE: 1071 PROTOTYPE:
526 CODE: 1072 CODE:
1073 if (nreqs)
527 poll_wait (); 1074 poll_wait ();
528 1075
529int 1076int
530nreqs() 1077nreqs()
531 PROTOTYPE: 1078 PROTOTYPE:
532 CODE: 1079 CODE:

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