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Comparing cvsroot/IO-AIO/AIO.xs (file contents):
Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs.
Revision 1.45 by root, Sun Oct 22 00:19:05 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>
14#include <sys/time.h>
15#include <sys/select.h>
7#include <sys/types.h> 16#include <sys/types.h>
8#include <sys/stat.h> 17#include <sys/stat.h>
18#include <limits.h>
9#include <unistd.h> 19#include <unistd.h>
10#include <fcntl.h> 20#include <fcntl.h>
11#include <signal.h> 21#include <signal.h>
12#include <sched.h> 22#include <sched.h>
13#include <endian.h>
14 23
15#include <pthread.h> 24#if HAVE_SENDFILE
25# if __linux
26# include <sys/sendfile.h>
27# elif __freebsd
16#include <sys/syscall.h> 28# include <sys/socket.h>
29# include <sys/uio.h>
30# elif __hpux
31# include <sys/socket.h>
32# elif __solaris /* not yet */
33# include <sys/sendfile.h>
34# else
35# error sendfile support requested but not available
36# endif
37#endif
17 38
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 39/* used for struct dirent, AIX doesn't provide it */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 40#ifndef NAME_MAX
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 41# define NAME_MAX 4096
42#endif
21 43
22#if __i386 || __amd64
23# define STACKSIZE ( 256 * sizeof (long))
24#elif __ia64 44#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 45# define STACKSIZE 65536
26#else 46#else
27# define STACKSIZE ( 512 * sizeof (long)) 47# define STACKSIZE 8192
28#endif 48#endif
29 49
30enum { 50enum {
31 REQ_QUIT, 51 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 52 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 53 REQ_READ, REQ_WRITE, REQ_READAHEAD,
54 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 55 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 56 REQ_FSYNC, REQ_FDATASYNC,
57 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58 REQ_READDIR,
59 REQ_LINK, REQ_SYMLINK,
60 REQ_SLEEP,
61 REQ_GROUP,
36}; 62};
37 63
64#define AIO_REQ_KLASS "IO::AIO::REQ"
65#define AIO_GRP_KLASS "IO::AIO::GRP"
66
38typedef struct aio_cb { 67typedef struct aio_cb
68{
69 struct aio_cb *grp, *grp_prev, *grp_next;
70
39 struct aio_cb *volatile next; 71 struct aio_cb *volatile next;
40 72
41 int type; 73 SV *self; /* the perl counterpart of this request, if any */
42 74
43 int fd; 75 SV *data, *callback;
76 SV *fh, *fh2;
77 void *dataptr, *data2ptr;
78 Stat_t *statdata;
44 off_t offset; 79 off_t offset;
45 size_t length; 80 size_t length;
46 ssize_t result; 81 ssize_t result;
82
83 int type;
84 int fd, fd2;
85 int errorno;
86 STRLEN dataoffset;
47 mode_t mode; /* open */ 87 mode_t mode; /* open */
48 int errorno; 88 unsigned char cancelled;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52
53 Stat_t *statdata;
54} aio_cb; 89} aio_cb;
55 90
56typedef aio_cb *aio_req; 91typedef aio_cb *aio_req;
92typedef aio_cb *aio_req_ornot;
93typedef aio_cb *aio_group;
57 94
58static int started; 95static int started, wanted;
59static int nreqs; 96static volatile int nreqs;
97static int max_outstanding = 1<<30;
60static int respipe [2]; 98static int respipe [2];
61 99
62static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 100static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
63static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 101static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
64static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 102static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65 103
66static volatile aio_req reqs, reqe; /* queue start, queue end */ 104static volatile aio_req reqs, reqe; /* queue start, queue end */
67static volatile aio_req ress, rese; /* queue start, queue end */ 105static volatile aio_req ress, rese; /* queue start, queue end */
68 106
69static void *aio_proc(void *arg); 107static void req_free (aio_req req);
70 108
71static void 109/* must be called at most once */
72start_thread (void) 110static SV *req_sv (aio_req req, const char *klass)
73{ 111{
74 sigset_t fullsigset, oldsigset; 112 req->self = (SV *)newHV ();
75 pthread_t tid; 113 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
76 pthread_attr_t attr;
77 114
78 pthread_attr_init (&attr); 115 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
79 pthread_attr_setstacksize (&attr, STACKSIZE);
80 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
81
82 sigfillset (&fullsigset);
83 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
84
85 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
86 started++;
87
88 sigprocmask (SIG_SETMASK, &oldsigset, 0);
89} 116}
90 117
91static void 118static aio_req SvAIO_REQ (SV *sv)
92send_req (aio_req req)
93{ 119{
94 nreqs++; 120 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
121 croak ("object of class " AIO_REQ_KLASS " expected");
95 122
96 pthread_mutex_lock (&reqlock); 123 MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
97 124
98 req->next = 0; 125 return mg ? (aio_req)mg->mg_ptr : 0;
126}
99 127
100 if (reqe) 128static void poll_wait ()
101 { 129{
102 reqe->next = req; 130 if (nreqs && !ress)
103 reqe = req;
104 } 131 {
105 else 132 fd_set rfd;
106 reqe = reqs = req; 133 FD_ZERO(&rfd);
134 FD_SET(respipe [0], &rfd);
107 135
108 pthread_cond_signal (&reqwait); 136 select (respipe [0] + 1, &rfd, 0, 0, 0);
109 pthread_mutex_unlock (&reqlock);
110}
111
112static void
113end_thread (void)
114{
115 aio_req req;
116 New (0, req, 1, aio_cb);
117 req->type = REQ_QUIT;
118
119 send_req (req);
120}
121
122static void
123read_write (pTHX_
124 int dowrite, int fd, off_t offset, size_t length,
125 SV *data, STRLEN dataoffset, SV *callback)
126{
127 aio_req req;
128 STRLEN svlen;
129 char *svptr = SvPV (data, svlen);
130
131 SvUPGRADE (data, SVt_PV);
132 SvPOK_on (data);
133
134 if (dataoffset < 0)
135 dataoffset += svlen;
136
137 if (dataoffset < 0 || dataoffset > svlen)
138 croak ("data offset outside of string");
139
140 if (dowrite)
141 { 137 }
142 /* write: check length and adjust. */
143 if (length < 0 || length + dataoffset > svlen)
144 length = svlen - dataoffset;
145 }
146 else
147 {
148 /* read: grow scalar as necessary */
149 svptr = SvGROW (data, length + dataoffset);
150 }
151
152 if (length < 0)
153 croak ("length must not be negative");
154
155 Newz (0, req, 1, aio_cb);
156
157 if (!req)
158 croak ("out of memory during aio_req allocation");
159
160 req->type = dowrite ? REQ_WRITE : REQ_READ;
161 req->fd = fd;
162 req->offset = offset;
163 req->length = length;
164 req->data = SvREFCNT_inc (data);
165 req->dataptr = (char *)svptr + dataoffset;
166 req->callback = SvREFCNT_inc (callback);
167
168 send_req (req);
169} 138}
170 139
171static void 140static void req_invoke (aio_req req)
172poll_wait ()
173{ 141{
174 if (!nreqs) 142 dSP;
143 int errorno = errno;
144
145 if (req->cancelled || !SvOK (req->callback))
175 return; 146 return;
176 147
177 fd_set rfd; 148 errno = req->errorno;
178 FD_ZERO(&rfd);
179 FD_SET(respipe [0], &rfd);
180 149
181 select (respipe [0] + 1, &rfd, 0, 0, 0); 150 ENTER;
182} 151 PUSHMARK (SP);
183 152
184static int 153 switch (req->type)
185poll_cb (pTHX) 154 {
155 case REQ_READDIR:
156 {
157 SV *rv = &PL_sv_undef;
158
159 if (req->result >= 0)
160 {
161 char *buf = req->data2ptr;
162 AV *av = newAV ();
163
164 while (req->result)
165 {
166 SV *sv = newSVpv (buf, 0);
167
168 av_push (av, sv);
169 buf += SvCUR (sv) + 1;
170 req->result--;
171 }
172
173 rv = sv_2mortal (newRV_noinc ((SV *)av));
174 }
175
176 XPUSHs (rv);
177 }
178 break;
179
180 case REQ_OPEN:
181 {
182 /* convert fd to fh */
183 SV *fh;
184
185 XPUSHs (sv_2mortal (newSViv (req->result)));
186 PUTBACK;
187 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
188 SPAGAIN;
189
190 fh = SvREFCNT_inc (POPs);
191
192 PUSHMARK (SP);
193 XPUSHs (sv_2mortal (fh));
194 }
195 break;
196
197 case REQ_SLEEP:
198 case REQ_GROUP:
199 break;
200
201 default:
202 XPUSHs (sv_2mortal (newSViv (req->result)));
203 break;
204 }
205
206
207 PUTBACK;
208 call_sv (req->callback, G_VOID | G_EVAL);
209 SPAGAIN;
210
211 if (SvTRUE (ERRSV))
212 {
213 req_free (req);
214 croak (0);
215 }
216
217 LEAVE;
218
219 errno = errorno;
220}
221
222static void req_free (aio_req req)
223{
224 if (req->grp)
225 {
226 aio_req grp = req->grp;
227
228 /* unlink request */
229 req->grp_next->grp_prev = req->grp_prev;
230 req->grp_prev->grp_next = req->grp_next;
231
232 if (grp->grp_next == grp)
233 {
234 req_invoke (grp);
235 req_free (grp);
236 }
237 }
238
239 if (req->self)
240 {
241 sv_unmagic (req->self, PERL_MAGIC_ext);
242 SvREFCNT_dec (req->self);
243 }
244
245 if (req->data)
246 SvREFCNT_dec (req->data);
247
248 if (req->fh)
249 SvREFCNT_dec (req->fh);
250
251 if (req->fh2)
252 SvREFCNT_dec (req->fh2);
253
254 if (req->statdata)
255 Safefree (req->statdata);
256
257 if (req->callback)
258 SvREFCNT_dec (req->callback);
259
260 if (req->type == REQ_READDIR && req->result >= 0)
261 free (req->data2ptr);
262
263 Safefree (req);
264}
265
266static void req_cancel (aio_req req)
267{
268 req->cancelled = 1;
269
270 if (req->type == REQ_GROUP)
271 {
272 aio_req sub;
273
274 for (sub = req->grp_next; sub != req; sub = sub->grp_next)
275 req_cancel (sub);
276 }
277}
278
279static int poll_cb ()
186{ 280{
187 dSP; 281 dSP;
188 int count = 0; 282 int count = 0;
283 int do_croak = 0;
189 aio_req req; 284 aio_req req;
190
191 {
192 /* read and signals sent by the worker threads */
193 char buf [32];
194 while (read (respipe [0], buf, 32) > 0)
195 ;
196 }
197 285
198 for (;;) 286 for (;;)
199 { 287 {
200 pthread_mutex_lock (&reslock); 288 pthread_mutex_lock (&reslock);
201
202 req = ress; 289 req = ress;
203 290
204 if (ress) 291 if (req)
205 { 292 {
206 ress = ress->next; 293 ress = req->next;
294
207 if (!ress) rese = 0; 295 if (!ress)
296 {
297 /* read any signals sent by the worker threads */
298 char buf [32];
299 while (read (respipe [0], buf, 32) == 32)
300 ;
301
302 rese = 0;
303 }
208 } 304 }
209 305
210 pthread_mutex_unlock (&reslock); 306 pthread_mutex_unlock (&reslock);
211 307
212 if (!req) 308 if (!req)
… …
214 310
215 nreqs--; 311 nreqs--;
216 312
217 if (req->type == REQ_QUIT) 313 if (req->type == REQ_QUIT)
218 started--; 314 started--;
315 else if (req->type == REQ_GROUP && req->grp_next != req)
316 continue;
219 else 317 else
220 { 318 {
221 int errorno = errno;
222 errno = req->errorno;
223
224 if (req->type == REQ_READ) 319 if (req->type == REQ_READ)
225 SvCUR_set (req->data, req->dataoffset 320 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
226 + req->result > 0 ? req->result : 0);
227 321
322 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
323 SvREADONLY_off (req->data);
324
228 if (req->data) 325 if (req->statdata)
229 SvREFCNT_dec (req->data);
230
231 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
232 { 326 {
233 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 327 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
234 PL_laststatval = req->result; 328 PL_laststatval = req->result;
235 PL_statcache = *(req->statdata); 329 PL_statcache = *(req->statdata);
236
237 Safefree (req->statdata);
238 } 330 }
239 331
240 PUSHMARK (SP); 332 req_invoke (req);
241 XPUSHs (sv_2mortal (newSViv (req->result)));
242 333
243 if (req->type == REQ_OPEN)
244 {
245 /* convert fd to fh */
246 SV *fh;
247
248 PUTBACK;
249 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
250 SPAGAIN;
251
252 fh = POPs;
253
254 PUSHMARK (SP);
255 XPUSHs (fh);
256 }
257
258 PUTBACK;
259 call_sv (req->callback, G_VOID | G_EVAL);
260 SPAGAIN;
261
262 if (req->callback)
263 SvREFCNT_dec (req->callback);
264
265 errno = errorno;
266 count++; 334 count++;
267 } 335 }
268 336
269 Safefree (req); 337 req_free (req);
270 } 338 }
271 339
272 return count; 340 return count;
273} 341}
274 342
275static void * 343static void *aio_proc(void *arg);
344
345static void start_thread (void)
346{
347 sigset_t fullsigset, oldsigset;
348 pthread_t tid;
349 pthread_attr_t attr;
350
351 pthread_attr_init (&attr);
352 pthread_attr_setstacksize (&attr, STACKSIZE);
353 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
354
355 sigfillset (&fullsigset);
356 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
357
358 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
359 started++;
360
361 sigprocmask (SIG_SETMASK, &oldsigset, 0);
362}
363
364static void req_send (aio_req req)
365{
366 while (started < wanted && nreqs >= started)
367 start_thread ();
368
369 nreqs++;
370
371 pthread_mutex_lock (&reqlock);
372
373 req->next = 0;
374
375 if (reqe)
376 {
377 reqe->next = req;
378 reqe = req;
379 }
380 else
381 reqe = reqs = req;
382
383 pthread_cond_signal (&reqwait);
384 pthread_mutex_unlock (&reqlock);
385
386 if (nreqs > max_outstanding)
387 for (;;)
388 {
389 poll_cb ();
390
391 if (nreqs <= max_outstanding)
392 break;
393
394 poll_wait ();
395 }
396}
397
398static void end_thread (void)
399{
400 aio_req req;
401 Newz (0, req, 1, aio_cb);
402 req->type = REQ_QUIT;
403
404 req_send (req);
405}
406
407static void min_parallel (int nthreads)
408{
409 if (wanted < nthreads)
410 wanted = nthreads;
411}
412
413static void max_parallel (int nthreads)
414{
415 int cur = started;
416
417 if (wanted > nthreads)
418 wanted = nthreads;
419
420 while (cur > wanted)
421 {
422 end_thread ();
423 cur--;
424 }
425
426 while (started > wanted)
427 {
428 poll_wait ();
429 poll_cb ();
430 }
431}
432
433static void create_pipe ()
434{
435 if (pipe (respipe))
436 croak ("unable to initialize result pipe");
437
438 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
439 croak ("cannot set result pipe to nonblocking mode");
440
441 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
442 croak ("cannot set result pipe to nonblocking mode");
443}
444
445/*****************************************************************************/
446/* work around various missing functions */
447
448#if !HAVE_PREADWRITE
449# define pread aio_pread
450# define pwrite aio_pwrite
451
452/*
453 * make our pread/pwrite safe against themselves, but not against
454 * normal read/write by using a mutex. slows down execution a lot,
455 * but that's your problem, not mine.
456 */
457static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
458
459static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
460{
461 ssize_t res;
462 off_t ooffset;
463
464 pthread_mutex_lock (&preadwritelock);
465 ooffset = lseek (fd, 0, SEEK_CUR);
466 lseek (fd, offset, SEEK_SET);
467 res = read (fd, buf, count);
468 lseek (fd, ooffset, SEEK_SET);
469 pthread_mutex_unlock (&preadwritelock);
470
471 return res;
472}
473
474static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
475{
476 ssize_t res;
477 off_t ooffset;
478
479 pthread_mutex_lock (&preadwritelock);
480 ooffset = lseek (fd, 0, SEEK_CUR);
481 lseek (fd, offset, SEEK_SET);
482 res = write (fd, buf, count);
483 lseek (fd, offset, SEEK_SET);
484 pthread_mutex_unlock (&preadwritelock);
485
486 return res;
487}
488#endif
489
490#if !HAVE_FDATASYNC
491# define fdatasync fsync
492#endif
493
494#if !HAVE_READAHEAD
495# define readahead aio_readahead
496
497static ssize_t readahead (int fd, off_t offset, size_t count)
498{
499 char readahead_buf[4096];
500
501 while (count > 0)
502 {
503 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
504
505 pread (fd, readahead_buf, len, offset);
506 offset += len;
507 count -= len;
508 }
509
510 errno = 0;
511}
512#endif
513
514#if !HAVE_READDIR_R
515# define readdir_r aio_readdir_r
516
517static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
518
519static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
520{
521 struct dirent *e;
522 int errorno;
523
524 pthread_mutex_lock (&readdirlock);
525
526 e = readdir (dirp);
527 errorno = errno;
528
529 if (e)
530 {
531 *res = ent;
532 strcpy (ent->d_name, e->d_name);
533 }
534 else
535 *res = 0;
536
537 pthread_mutex_unlock (&readdirlock);
538
539 errno = errorno;
540 return e ? 0 : -1;
541}
542#endif
543
544/* sendfile always needs emulation */
545static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
546{
547 ssize_t res;
548
549 if (!count)
550 return 0;
551
552#if HAVE_SENDFILE
553# if __linux
554 res = sendfile (ofd, ifd, &offset, count);
555
556# elif __freebsd
557 /*
558 * Of course, the freebsd sendfile is a dire hack with no thoughts
559 * wasted on making it similar to other I/O functions.
560 */
561 {
562 off_t sbytes;
563 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
564
565 if (res < 0 && sbytes)
566 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
567 res = sbytes;
568 }
569
570# elif __hpux
571 res = sendfile (ofd, ifd, offset, count, 0, 0);
572
573# elif __solaris
574 {
575 struct sendfilevec vec;
576 size_t sbytes;
577
578 vec.sfv_fd = ifd;
579 vec.sfv_flag = 0;
580 vec.sfv_off = offset;
581 vec.sfv_len = count;
582
583 res = sendfilev (ofd, &vec, 1, &sbytes);
584
585 if (res < 0 && sbytes)
586 res = sbytes;
587 }
588
589# endif
590#else
591 res = -1;
592 errno = ENOSYS;
593#endif
594
595 if (res < 0
596 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
597#if __solaris
598 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
599#endif
600 )
601 )
602 {
603 /* emulate sendfile. this is a major pain in the ass */
604 char buf[4096];
605 res = 0;
606
607 while (count)
608 {
609 ssize_t cnt;
610
611 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
612
613 if (cnt <= 0)
614 {
615 if (cnt && !res) res = -1;
616 break;
617 }
618
619 cnt = write (ofd, buf, cnt);
620
621 if (cnt <= 0)
622 {
623 if (cnt && !res) res = -1;
624 break;
625 }
626
627 offset += cnt;
628 res += cnt;
629 count -= cnt;
630 }
631 }
632
633 return res;
634}
635
636/* read a full directory */
637static int scandir_ (const char *path, void **namesp)
638{
639 DIR *dirp = opendir (path);
640 union
641 {
642 struct dirent d;
643 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
644 } u;
645 struct dirent *entp;
646 char *name, *names;
647 int memlen = 4096;
648 int memofs = 0;
649 int res = 0;
650 int errorno;
651
652 if (!dirp)
653 return -1;
654
655 names = malloc (memlen);
656
657 for (;;)
658 {
659 errno = 0, readdir_r (dirp, &u.d, &entp);
660
661 if (!entp)
662 break;
663
664 name = entp->d_name;
665
666 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
667 {
668 int len = strlen (name) + 1;
669
670 res++;
671
672 while (memofs + len > memlen)
673 {
674 memlen *= 2;
675 names = realloc (names, memlen);
676 if (!names)
677 break;
678 }
679
680 memcpy (names + memofs, name, len);
681 memofs += len;
682 }
683 }
684
685 errorno = errno;
686 closedir (dirp);
687
688 if (errorno)
689 {
690 free (names);
691 errno = errorno;
692 res = -1;
693 }
694
695 *namesp = (void *)names;
696 return res;
697}
698
699/*****************************************************************************/
700
276aio_proc (void *thr_arg) 701static void *aio_proc (void *thr_arg)
277{ 702{
278 aio_req req; 703 aio_req req;
279 int type; 704 int type;
280 705
281 do 706 do
… …
300 725
301 pthread_mutex_unlock (&reqlock); 726 pthread_mutex_unlock (&reqlock);
302 727
303 errno = 0; /* strictly unnecessary */ 728 errno = 0; /* strictly unnecessary */
304 729
305 type = req->type; 730 if (!req->cancelled)
306
307 switch (type) 731 switch (req->type)
308 { 732 {
309 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 733 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
310 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 734 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
311#if SYS_readahead 735
312 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 736 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
313#else 737 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
314 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
315#endif
316 738
317 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 739 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
318 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 740 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
319 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 741 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
320 742
321 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 743 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
322 case REQ_CLOSE: req->result = close (req->fd); break; 744 case REQ_CLOSE: req->result = close (req->fd); break;
323 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 745 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
324
325 case REQ_FSYNC: req->result = fsync (req->fd); break; 746 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
747 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
748 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
749 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
750
326 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 751 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
752 case REQ_FSYNC: req->result = fsync (req->fd); break;
753 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
327 754
755 case REQ_SLEEP:
756 {
757 struct timeval tv;
758
759 tv.tv_sec = req->fd;
760 tv.tv_usec = req->fd2;
761
762 req->result = select (0, 0, 0, 0, &tv);
763 }
764
328 case REQ_QUIT: 765 case REQ_QUIT:
329 break; 766 break;
330 767
331 default: 768 default:
332 req->result = ENOSYS; 769 req->result = ENOSYS;
333 break; 770 break;
334 } 771 }
335 772
336 req->errorno = errno; 773 req->errorno = errno;
337 774
338 pthread_mutex_lock (&reslock); 775 pthread_mutex_lock (&reslock);
339 776
… …
357 while (type != REQ_QUIT); 794 while (type != REQ_QUIT);
358 795
359 return 0; 796 return 0;
360} 797}
361 798
799/*****************************************************************************/
800
801static void atfork_prepare (void)
802{
803 pthread_mutex_lock (&reqlock);
804 pthread_mutex_lock (&reslock);
805#if !HAVE_PREADWRITE
806 pthread_mutex_lock (&preadwritelock);
807#endif
808#if !HAVE_READDIR_R
809 pthread_mutex_lock (&readdirlock);
810#endif
811}
812
813static void atfork_parent (void)
814{
815#if !HAVE_READDIR_R
816 pthread_mutex_unlock (&readdirlock);
817#endif
818#if !HAVE_PREADWRITE
819 pthread_mutex_unlock (&preadwritelock);
820#endif
821 pthread_mutex_unlock (&reslock);
822 pthread_mutex_unlock (&reqlock);
823}
824
825static void atfork_child (void)
826{
827 aio_req prv;
828
829 started = 0;
830
831 while (reqs)
832 {
833 prv = reqs;
834 reqs = prv->next;
835 req_free (prv);
836 }
837
838 reqs = reqe = 0;
839
840 while (ress)
841 {
842 prv = ress;
843 ress = prv->next;
844 req_free (prv);
845 }
846
847 ress = rese = 0;
848
849 close (respipe [0]);
850 close (respipe [1]);
851 create_pipe ();
852
853 atfork_parent ();
854}
855
856#define dREQ \
857 aio_req req; \
858 \
859 if (SvOK (callback) && !SvROK (callback)) \
860 croak ("callback must be undef or of reference type"); \
861 \
862 Newz (0, req, 1, aio_cb); \
863 if (!req) \
864 croak ("out of memory during aio_req allocation"); \
865 \
866 req->callback = newSVsv (callback)
867
868#define REQ_SEND \
869 req_send (req); \
870 \
871 if (GIMME_V != G_VOID) \
872 XPUSHs (req_sv (req, AIO_REQ_KLASS));
873
362MODULE = IO::AIO PACKAGE = IO::AIO 874MODULE = IO::AIO PACKAGE = IO::AIO
363 875
876PROTOTYPES: ENABLE
877
364BOOT: 878BOOT:
365{ 879{
366 if (pipe (respipe)) 880 HV *stash = gv_stashpv ("IO::AIO", 1);
367 croak ("unable to initialize result pipe"); 881 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
882 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
883 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
368 884
369 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 885 create_pipe ();
370 croak ("cannot set result pipe to nonblocking mode"); 886 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
371
372 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
373 croak ("cannot set result pipe to nonblocking mode");
374} 887}
375 888
376void 889void
377min_parallel(nthreads) 890min_parallel (nthreads)
378 int nthreads 891 int nthreads
379 PROTOTYPE: $ 892 PROTOTYPE: $
380 CODE:
381 while (nthreads > started)
382 start_thread ();
383 893
384void 894void
385max_parallel(nthreads) 895max_parallel (nthreads)
386 int nthreads 896 int nthreads
387 PROTOTYPE: $ 897 PROTOTYPE: $
898
899int
900max_outstanding (nreqs)
901 int nreqs
902 PROTOTYPE: $
388 CODE: 903 CODE:
389{ 904 RETVAL = max_outstanding;
390 int cur = started; 905 max_outstanding = nreqs;
391 while (cur > nthreads)
392 {
393 end_thread ();
394 cur--;
395 }
396 906
397 while (started > nthreads)
398 {
399 poll_wait ();
400 poll_cb (aTHX);
401 }
402}
403
404void 907void
405aio_open(pathname,flags,mode,callback) 908aio_open (pathname,flags,mode,callback=&PL_sv_undef)
406 SV * pathname 909 SV * pathname
407 int flags 910 int flags
408 int mode 911 int mode
409 SV * callback 912 SV * callback
410 PROTOTYPE: $$$$ 913 PROTOTYPE: $$$;$
411 CODE: 914 PPCODE:
412{ 915{
413 aio_req req; 916 dREQ;
414
415 Newz (0, req, 1, aio_cb);
416
417 if (!req)
418 croak ("out of memory during aio_req allocation");
419 917
420 req->type = REQ_OPEN; 918 req->type = REQ_OPEN;
421 req->data = newSVsv (pathname); 919 req->data = newSVsv (pathname);
422 req->dataptr = SvPV_nolen (req->data); 920 req->dataptr = SvPVbyte_nolen (req->data);
423 req->fd = flags; 921 req->fd = flags;
424 req->mode = mode; 922 req->mode = mode;
425 req->callback = SvREFCNT_inc (callback);
426 923
427 send_req (req); 924 REQ_SEND;
428} 925}
429 926
430void 927void
431aio_close(fh,callback) 928aio_close (fh,callback=&PL_sv_undef)
432 InputStream fh 929 SV * fh
433 SV * callback 930 SV * callback
434 PROTOTYPE: $$ 931 PROTOTYPE: $;$
435 ALIAS: 932 ALIAS:
436 aio_close = REQ_CLOSE 933 aio_close = REQ_CLOSE
437 aio_fsync = REQ_FSYNC 934 aio_fsync = REQ_FSYNC
438 aio_fdatasync = REQ_FDATASYNC 935 aio_fdatasync = REQ_FDATASYNC
439 CODE: 936 PPCODE:
937{
938 dREQ;
939
940 req->type = ix;
941 req->fh = newSVsv (fh);
942 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
943
944 REQ_SEND (req);
945}
946
947void
948aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
949 SV * fh
950 UV offset
951 UV length
952 SV * data
953 UV dataoffset
954 SV * callback
955 ALIAS:
956 aio_read = REQ_READ
957 aio_write = REQ_WRITE
958 PROTOTYPE: $$$$$;$
959 PPCODE:
440{ 960{
441 aio_req req; 961 aio_req req;
962 STRLEN svlen;
963 char *svptr = SvPVbyte (data, svlen);
442 964
443 Newz (0, req, 1, aio_cb); 965 SvUPGRADE (data, SVt_PV);
966 SvPOK_on (data);
444 967
445 if (!req) 968 if (dataoffset < 0)
446 croak ("out of memory during aio_req allocation"); 969 dataoffset += svlen;
447 970
448 req->type = ix; 971 if (dataoffset < 0 || dataoffset > svlen)
449 req->fd = PerlIO_fileno (fh); 972 croak ("data offset outside of string");
450 req->callback = SvREFCNT_inc (callback);
451 973
452 send_req (req); 974 if (ix == REQ_WRITE)
453} 975 {
454 976 /* write: check length and adjust. */
455void 977 if (length < 0 || length + dataoffset > svlen)
456aio_read(fh,offset,length,data,dataoffset,callback) 978 length = svlen - dataoffset;
457 InputStream fh 979 }
458 UV offset 980 else
459 IV length 981 {
460 SV * data 982 /* read: grow scalar as necessary */
461 IV dataoffset 983 svptr = SvGROW (data, length + dataoffset);
462 SV * callback 984 }
463 PROTOTYPE: $$$$$$
464 CODE:
465 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
466
467void
468aio_write(fh,offset,length,data,dataoffset,callback)
469 OutputStream fh
470 UV offset
471 IV length
472 SV * data
473 IV dataoffset
474 SV * callback
475 PROTOTYPE: $$$$$$
476 CODE:
477 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
478
479void
480aio_readahead(fh,offset,length,callback)
481 InputStream fh
482 UV offset
483 IV length
484 SV * callback
485 PROTOTYPE: $$$$
486 CODE:
487{
488 aio_req req;
489 985
490 if (length < 0) 986 if (length < 0)
491 croak ("length must not be negative"); 987 croak ("length must not be negative");
492 988
493 Newz (0, req, 1, aio_cb); 989 {
990 dREQ;
494 991
495 if (!req) 992 req->type = ix;
496 croak ("out of memory during aio_req allocation"); 993 req->fh = newSVsv (fh);
994 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
995 : IoOFP (sv_2io (fh)));
996 req->offset = offset;
997 req->length = length;
998 req->data = SvREFCNT_inc (data);
999 req->dataptr = (char *)svptr + dataoffset;
1000
1001 if (!SvREADONLY (data))
1002 {
1003 SvREADONLY_on (data);
1004 req->data2ptr = (void *)data;
1005 }
1006
1007 REQ_SEND;
1008 }
1009}
1010
1011void
1012aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1013 SV * out_fh
1014 SV * in_fh
1015 UV in_offset
1016 UV length
1017 SV * callback
1018 PROTOTYPE: $$$$;$
1019 PPCODE:
1020{
1021 dREQ;
1022
1023 req->type = REQ_SENDFILE;
1024 req->fh = newSVsv (out_fh);
1025 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1026 req->fh2 = newSVsv (in_fh);
1027 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1028 req->offset = in_offset;
1029 req->length = length;
1030
1031 REQ_SEND;
1032}
1033
1034void
1035aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1036 SV * fh
1037 UV offset
1038 IV length
1039 SV * callback
1040 PROTOTYPE: $$$;$
1041 PPCODE:
1042{
1043 dREQ;
497 1044
498 req->type = REQ_READAHEAD; 1045 req->type = REQ_READAHEAD;
1046 req->fh = newSVsv (fh);
499 req->fd = PerlIO_fileno (fh); 1047 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
500 req->offset = offset; 1048 req->offset = offset;
501 req->length = length; 1049 req->length = length;
502 req->callback = SvREFCNT_inc (callback);
503 1050
504 send_req (req); 1051 REQ_SEND;
505} 1052}
506 1053
507void 1054void
508aio_stat(fh_or_path,callback) 1055aio_stat (fh_or_path,callback=&PL_sv_undef)
509 SV * fh_or_path 1056 SV * fh_or_path
510 SV * callback 1057 SV * callback
511 PROTOTYPE: $$
512 ALIAS: 1058 ALIAS:
1059 aio_stat = REQ_STAT
513 aio_lstat = 1 1060 aio_lstat = REQ_LSTAT
514 CODE: 1061 PPCODE:
515{ 1062{
516 aio_req req; 1063 dREQ;
517
518 Newz (0, req, 1, aio_cb);
519
520 if (!req)
521 croak ("out of memory during aio_req allocation");
522 1064
523 New (0, req->statdata, 1, Stat_t); 1065 New (0, req->statdata, 1, Stat_t);
524
525 if (!req->statdata) 1066 if (!req->statdata)
1067 {
1068 req_free (req);
526 croak ("out of memory during aio_req->statdata allocation"); 1069 croak ("out of memory during aio_req->statdata allocation");
1070 }
527 1071
528 if (SvPOK (fh_or_path)) 1072 if (SvPOK (fh_or_path))
529 { 1073 {
530 req->type = ix ? REQ_LSTAT : REQ_STAT; 1074 req->type = ix;
531 req->data = newSVsv (fh_or_path); 1075 req->data = newSVsv (fh_or_path);
532 req->dataptr = SvPV_nolen (req->data); 1076 req->dataptr = SvPVbyte_nolen (req->data);
533 } 1077 }
534 else 1078 else
535 { 1079 {
536 req->type = REQ_FSTAT; 1080 req->type = REQ_FSTAT;
1081 req->fh = newSVsv (fh_or_path);
537 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1082 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
538 } 1083 }
539 1084
540 req->callback = SvREFCNT_inc (callback); 1085 REQ_SEND;
541
542 send_req (req);
543} 1086}
544 1087
545void 1088void
546aio_unlink(pathname,callback) 1089aio_unlink (pathname,callback=&PL_sv_undef)
547 SV * pathname 1090 SV * pathname
548 SV * callback 1091 SV * callback
1092 ALIAS:
1093 aio_unlink = REQ_UNLINK
1094 aio_rmdir = REQ_RMDIR
1095 aio_readdir = REQ_READDIR
1096 PPCODE:
1097{
1098 dREQ;
1099
1100 req->type = ix;
1101 req->data = newSVsv (pathname);
1102 req->dataptr = SvPVbyte_nolen (req->data);
1103
1104 REQ_SEND;
1105}
1106
1107void
1108aio_link (oldpath,newpath,callback=&PL_sv_undef)
1109 SV * oldpath
1110 SV * newpath
1111 SV * callback
1112 ALIAS:
1113 aio_link = REQ_LINK
1114 aio_symlink = REQ_SYMLINK
1115 aio_rename = REQ_RENAME
1116 PPCODE:
1117{
1118 dREQ;
1119
1120 req->type = ix;
1121 req->fh = newSVsv (oldpath);
1122 req->data2ptr = SvPVbyte_nolen (req->fh);
1123 req->data = newSVsv (newpath);
1124 req->dataptr = SvPVbyte_nolen (req->data);
1125
1126 REQ_SEND;
1127}
1128
1129void
1130aio_sleep (delay,callback=&PL_sv_undef)
1131 double delay
1132 SV * callback
1133 PPCODE:
1134{
1135 dREQ;
1136
1137 req->type = REQ_SLEEP;
1138 req->fd = delay < 0. ? 0 : delay;
1139 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1140
1141 REQ_SEND;
1142}
1143
1144void
1145aio_group (callback=&PL_sv_undef)
1146 SV * callback
1147 PROTOTYPE: ;&
1148 PPCODE:
1149{
1150 dREQ;
1151 req->type = REQ_GROUP;
1152 req->grp_next = req;
1153 req->grp_prev = req;
1154
1155 req_send (req);
1156 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1157}
1158
1159void
1160flush ()
549 PROTOTYPE: $$ 1161 PROTOTYPE:
550 CODE: 1162 CODE:
551{ 1163 while (nreqs)
552 aio_req req; 1164 {
553 1165 poll_wait ();
554 Newz (0, req, 1, aio_cb); 1166 poll_cb ();
555 1167 }
556 if (!req) 1168
557 croak ("out of memory during aio_req allocation"); 1169void
558 1170poll()
559 req->type = REQ_UNLINK; 1171 PROTOTYPE:
560 req->data = newSVsv (pathname); 1172 CODE:
561 req->dataptr = SvPV_nolen (req->data); 1173 if (nreqs)
562 req->callback = SvREFCNT_inc (callback); 1174 {
563 1175 poll_wait ();
564 send_req (req); 1176 poll_cb ();
565} 1177 }
566 1178
567int 1179int
568poll_fileno() 1180poll_fileno()
569 PROTOTYPE: 1181 PROTOTYPE:
570 CODE: 1182 CODE:
… …
574 1186
575int 1187int
576poll_cb(...) 1188poll_cb(...)
577 PROTOTYPE: 1189 PROTOTYPE:
578 CODE: 1190 CODE:
579 RETVAL = poll_cb (aTHX); 1191 RETVAL = poll_cb ();
580 OUTPUT: 1192 OUTPUT:
581 RETVAL 1193 RETVAL
582 1194
583void 1195void
584poll_wait() 1196poll_wait()
… …
593 CODE: 1205 CODE:
594 RETVAL = nreqs; 1206 RETVAL = nreqs;
595 OUTPUT: 1207 OUTPUT:
596 RETVAL 1208 RETVAL
597 1209
1210MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1211
1212void
1213cancel (aio_req_ornot req)
1214 PROTOTYPE:
1215 CODE:
1216 req_cancel (req);
1217
1218MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1219
1220void
1221add (aio_req grp, ...)
1222 PROTOTYPE: $;@
1223 PPCODE:
1224{
1225 int i;
1226
1227 for (i = 1; i < items; ++i )
1228 {
1229 aio_req req = SvAIO_REQ (ST (i));
1230
1231 req->grp_prev = grp;
1232 req->grp_next = grp->grp_next;
1233 grp->grp_next->grp_prev = req;
1234 grp->grp_next = req;
1235
1236 req->grp = grp;
1237
1238 if (GIMME_V != G_VOID)
1239 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1240 }
1241}
1242

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