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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.26 by root, Wed Aug 17 03:52:20 2005 UTC vs.
Revision 1.48 by root, Sun Oct 22 10:33:19 2006 UTC

… …
5#include "perl.h" 5#include "perl.h"
6#include "XSUB.h" 6#include "XSUB.h"
7 7
8#include "autoconf/config.h" 8#include "autoconf/config.h"
9 9
10#include <pthread.h>
11
12#include <stddef.h>
13#include <errno.h>
14#include <sys/time.h>
15#include <sys/select.h>
10#include <sys/types.h> 16#include <sys/types.h>
11#include <sys/stat.h> 17#include <sys/stat.h>
12 18#include <limits.h>
13#include <unistd.h> 19#include <unistd.h>
14#include <fcntl.h> 20#include <fcntl.h>
15#include <signal.h> 21#include <signal.h>
16#include <sched.h> 22#include <sched.h>
17 23
18#include <pthread.h> 24#if HAVE_SENDFILE
25# if __linux
26# include <sys/sendfile.h>
27# elif __freebsd
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
19 38
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 39/* used for struct dirent, AIX doesn't provide it */
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 40#ifndef NAME_MAX
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 41# define NAME_MAX 4096
42#endif
23 43
24#if __ia64 44#if __ia64
25# define STACKSIZE 65536 45# define STACKSIZE 65536
26#else 46#else
27# define STACKSIZE 4096 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, 55 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 56 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR, 57 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37 REQ_SYMLINK, 58 REQ_READDIR,
59 REQ_LINK, REQ_SYMLINK,
60 REQ_SLEEP,
61 REQ_GROUP,
38}; 62};
39 63
64#define AIO_REQ_KLASS "IO::AIO::REQ"
65#define AIO_GRP_KLASS "IO::AIO::GRP"
66
40typedef struct aio_cb { 67typedef struct aio_cb
68{
69 struct aio_cb *grp, *grp_prev, *grp_next;
70
41 struct aio_cb *volatile next; 71 struct aio_cb *volatile next;
42 72
43 int type; 73 SV *self; /* the perl counterpart of this request, if any */
44 74
45 int fd; 75 SV *data, *callback;
76 SV *fh, *fh2;
77 void *dataptr, *data2ptr;
78 Stat_t *statdata;
46 off_t offset; 79 off_t offset;
47 size_t length; 80 size_t length;
48 ssize_t result; 81 ssize_t result;
82
83 int type;
84 int fd, fd2;
85 int errorno;
86 STRLEN dataoffset;
49 mode_t mode; /* open */ 87 mode_t mode; /* open */
50 int errorno; 88 unsigned char cancelled;
51 SV *data, *callback, *fh;
52 void *dataptr, *data2ptr;
53 STRLEN dataoffset;
54
55 Stat_t *statdata;
56} aio_cb; 89} aio_cb;
57 90
58typedef aio_cb *aio_req; 91typedef aio_cb *aio_req;
92typedef aio_cb *aio_req_ornot;
59 93
60static int started; 94static int started, wanted;
61static volatile int nreqs; 95static volatile int nreqs;
62static int max_outstanding = 1<<30; 96static int max_outstanding = 1<<30;
63static int respipe [2]; 97static int respipe [2];
64 98
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 99static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;
66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 100static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 101static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69 102
70static volatile aio_req reqs, reqe; /* queue start, queue end */ 103static volatile aio_req reqs, reqe; /* queue start, queue end */
71static volatile aio_req ress, rese; /* queue start, queue end */ 104static volatile aio_req ress, rese; /* queue start, queue end */
72 105
73static void free_req (aio_req req) 106static void req_free (aio_req req);
74{
75 if (req->data)
76 SvREFCNT_dec (req->data);
77 107
78 if (req->fh) 108/* must be called at most once */
79 SvREFCNT_dec (req->fh); 109static SV *req_sv (aio_req req, const char *klass)
110{
111 req->self = (SV *)newHV ();
112 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80 113
81 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) 114 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
82 Safefree (req->statdata);
83
84 if (req->callback)
85 SvREFCNT_dec (req->callback);
86
87 Safefree (req);
88} 115}
89 116
90static void 117static aio_req SvAIO_REQ (SV *sv)
91poll_wait () 118{
119 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120 croak ("object of class " AIO_REQ_KLASS " expected");
121
122 MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123
124 return mg ? (aio_req)mg->mg_ptr : 0;
125}
126
127static void poll_wait ()
92{ 128{
93 if (nreqs && !ress) 129 if (nreqs && !ress)
94 { 130 {
95 fd_set rfd; 131 fd_set rfd;
96 FD_ZERO(&rfd); 132 FD_ZERO(&rfd);
… …
98 134
99 select (respipe [0] + 1, &rfd, 0, 0, 0); 135 select (respipe [0] + 1, &rfd, 0, 0, 0);
100 } 136 }
101} 137}
102 138
103static int 139static void req_invoke (aio_req req)
104poll_cb () 140{
141 dSP;
142 int errorno = errno;
143
144 if (req->cancelled || !SvOK (req->callback))
145 return;
146
147 errno = req->errorno;
148
149 ENTER;
150 PUSHMARK (SP);
151 EXTEND (SP, 1);
152
153 switch (req->type)
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 PUSHs (rv);
177 }
178 break;
179
180 case REQ_OPEN:
181 {
182 /* convert fd to fh */
183 SV *fh;
184
185 PUSHs (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_GROUP:
198 if (req->data)
199 {
200 int i;
201 AV *av = (AV *)req->data;
202
203 EXTEND (SP, AvFILL (av) + 1);
204 for (i = 0; i <= AvFILL (av); ++i)
205 PUSHs (*av_fetch (av, i, 0));
206 }
207 break;
208
209 case REQ_SLEEP:
210 break;
211
212 default:
213 PUSHs (sv_2mortal (newSViv (req->result)));
214 break;
215 }
216
217
218 PUTBACK;
219 call_sv (req->callback, G_VOID | G_EVAL);
220 SPAGAIN;
221
222 if (SvTRUE (ERRSV))
223 {
224 req_free (req);
225 croak (0);
226 }
227
228 LEAVE;
229
230 errno = errorno;
231}
232
233static void req_free (aio_req req)
234{
235 if (req->grp)
236 {
237 aio_req grp = req->grp;
238
239 /* unlink request */
240 req->grp_next->grp_prev = req->grp_prev;
241 req->grp_prev->grp_next = req->grp_next;
242
243 if (grp->grp_next == grp && grp->fd)
244 {
245 req_invoke (grp);
246 req_free (grp);
247 }
248 }
249
250 if (req->self)
251 {
252 sv_unmagic (req->self, PERL_MAGIC_ext);
253 SvREFCNT_dec (req->self);
254 }
255
256 if (req->data)
257 SvREFCNT_dec (req->data);
258
259 if (req->fh)
260 SvREFCNT_dec (req->fh);
261
262 if (req->fh2)
263 SvREFCNT_dec (req->fh2);
264
265 if (req->statdata)
266 Safefree (req->statdata);
267
268 if (req->callback)
269 SvREFCNT_dec (req->callback);
270
271 if (req->type == REQ_READDIR && req->result >= 0)
272 free (req->data2ptr);
273
274 Safefree (req);
275}
276
277static void req_cancel (aio_req req)
278{
279 req->cancelled = 1;
280
281 if (req->type == REQ_GROUP)
282 {
283 aio_req sub;
284
285 for (sub = req->grp_next; sub != req; sub = sub->grp_next)
286 req_cancel (sub);
287 }
288}
289
290static int poll_cb ()
105{ 291{
106 dSP; 292 dSP;
107 int count = 0; 293 int count = 0;
108 int do_croak = 0; 294 int do_croak = 0;
109 aio_req req, prv; 295 aio_req req;
110 296
297 for (;;)
298 {
111 pthread_mutex_lock (&reslock); 299 pthread_mutex_lock (&reslock);
300 req = ress;
112 301
113 { 302 if (req)
303 {
304 ress = req->next;
305
306 if (!ress)
307 {
114 /* read any signals sent by the worker threads */ 308 /* read any signals sent by the worker threads */
115 char buf [32]; 309 char buf [32];
116 while (read (respipe [0], buf, 32) == 32) 310 while (read (respipe [0], buf, 32) == 32)
311 ;
312
313 rese = 0;
314 }
117 ; 315 }
118 }
119 316
120 req = ress;
121 ress = rese = 0;
122
123 pthread_mutex_unlock (&reslock); 317 pthread_mutex_unlock (&reslock);
124 318
125 while (req) 319 if (!req)
126 { 320 break;
321
127 nreqs--; 322 nreqs--;
128 323
129 if (req->type == REQ_QUIT) 324 if (req->type == REQ_QUIT)
130 started--; 325 started--;
326 else if (req->type == REQ_GROUP && req->grp_next != req)
327 {
328 req->fd = 1; /* mark request as delayed */
329 continue;
330 }
131 else 331 else
132 { 332 {
133 int errorno = errno;
134 errno = req->errorno;
135
136 if (req->type == REQ_READ) 333 if (req->type == REQ_READ)
137 SvCUR_set (req->data, req->dataoffset 334 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
138 + req->result > 0 ? req->result : 0);
139 335
140 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) 336 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
337 SvREADONLY_off (req->data);
338
339 if (req->statdata)
141 { 340 {
142 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 341 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
143 PL_laststatval = req->result; 342 PL_laststatval = req->result;
144 PL_statcache = *(req->statdata); 343 PL_statcache = *(req->statdata);
145 } 344 }
146 345
147 ENTER; 346 req_invoke (req);
148 PUSHMARK (SP);
149 XPUSHs (sv_2mortal (newSViv (req->result)));
150 347
151 if (req->type == REQ_OPEN)
152 {
153 /* convert fd to fh */
154 SV *fh;
155
156 PUTBACK;
157 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
158 SPAGAIN;
159
160 fh = SvREFCNT_inc (POPs);
161
162 PUSHMARK (SP);
163 XPUSHs (sv_2mortal (fh));
164 }
165
166 if (SvOK (req->callback))
167 {
168 PUTBACK;
169 call_sv (req->callback, G_VOID | G_EVAL);
170 SPAGAIN;
171 }
172
173 LEAVE;
174
175 do_croak = SvTRUE (ERRSV);
176
177 errno = errorno;
178 count++; 348 count++;
179 } 349 }
180 350
181 prv = req; 351 req_free (req);
182 req = req->next;
183 free_req (prv);
184
185 if (do_croak)
186 croak (0);
187 } 352 }
188 353
189 return count; 354 return count;
190} 355}
191 356
192static void *aio_proc(void *arg); 357static void *aio_proc(void *arg);
193 358
194static void
195start_thread (void) 359static void start_thread (void)
196{ 360{
197 sigset_t fullsigset, oldsigset; 361 sigset_t fullsigset, oldsigset;
198 pthread_t tid; 362 pthread_t tid;
199 pthread_attr_t attr; 363 pthread_attr_t attr;
200 364
… …
209 started++; 373 started++;
210 374
211 sigprocmask (SIG_SETMASK, &oldsigset, 0); 375 sigprocmask (SIG_SETMASK, &oldsigset, 0);
212} 376}
213 377
214static void 378static void req_send (aio_req req)
215send_req (aio_req req)
216{ 379{
380 while (started < wanted && nreqs >= started)
381 start_thread ();
382
217 nreqs++; 383 nreqs++;
218 384
219 pthread_mutex_lock (&reqlock); 385 pthread_mutex_lock (&reqlock);
220 386
221 req->next = 0; 387 req->next = 0;
… …
229 reqe = reqs = req; 395 reqe = reqs = req;
230 396
231 pthread_cond_signal (&reqwait); 397 pthread_cond_signal (&reqwait);
232 pthread_mutex_unlock (&reqlock); 398 pthread_mutex_unlock (&reqlock);
233 399
234 while (nreqs > max_outstanding) 400 if (nreqs > max_outstanding)
401 for (;;)
235 { 402 {
403 poll_cb ();
404
405 if (nreqs <= max_outstanding)
406 break;
407
236 poll_wait (); 408 poll_wait ();
237 poll_cb ();
238 } 409 }
239} 410}
240 411
241static void 412static void end_thread (void)
242end_thread (void)
243{ 413{
244 aio_req req; 414 aio_req req;
245 Newz (0, req, 1, aio_cb); 415 Newz (0, req, 1, aio_cb);
246 req->type = REQ_QUIT; 416 req->type = REQ_QUIT;
247 417
248 send_req (req); 418 req_send (req);
249} 419}
250
251 420
252static void min_parallel (int nthreads) 421static void min_parallel (int nthreads)
253{ 422{
254 while (nthreads > started) 423 if (wanted < nthreads)
255 start_thread (); 424 wanted = nthreads;
256} 425}
257 426
258static void max_parallel (int nthreads) 427static void max_parallel (int nthreads)
259{ 428{
260 int cur = started; 429 int cur = started;
430
431 if (wanted > nthreads)
432 wanted = nthreads;
433
261 while (cur > nthreads) 434 while (cur > wanted)
262 { 435 {
263 end_thread (); 436 end_thread ();
264 cur--; 437 cur--;
265 } 438 }
266 439
267 while (started > nthreads) 440 while (started > wanted)
268 { 441 {
269 poll_wait (); 442 poll_wait ();
270 poll_cb (); 443 poll_cb ();
271 } 444 }
272} 445}
… …
279 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 452 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
280 croak ("cannot set result pipe to nonblocking mode"); 453 croak ("cannot set result pipe to nonblocking mode");
281 454
282 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 455 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
283 croak ("cannot set result pipe to nonblocking mode"); 456 croak ("cannot set result pipe to nonblocking mode");
284}
285
286static void atfork_prepare (void)
287{
288 pthread_mutex_lock (&frklock);
289 pthread_mutex_lock (&reqlock);
290 pthread_mutex_lock (&reslock);
291}
292
293static void atfork_parent (void)
294{
295 pthread_mutex_unlock (&reslock);
296 pthread_mutex_unlock (&reqlock);
297 pthread_mutex_unlock (&frklock);
298}
299
300static void atfork_child (void)
301{
302 int restart = started;
303 started = 0;
304
305 while (reqs)
306 {
307 free_req (reqs);
308 reqs = reqs->next;
309 }
310
311 reqs = reqe = 0;
312
313 while (ress)
314 {
315 free_req (ress);
316 ress = ress->next;
317 }
318
319 ress = rese = 0;
320
321 close (respipe [0]);
322 close (respipe [1]);
323
324 create_pipe ();
325
326 atfork_parent ();
327
328 min_parallel (restart);
329} 457}
330 458
331/*****************************************************************************/ 459/*****************************************************************************/
332/* work around various missing functions */ 460/* work around various missing functions */
333 461
… …
338/* 466/*
339 * make our pread/pwrite safe against themselves, but not against 467 * make our pread/pwrite safe against themselves, but not against
340 * normal read/write by using a mutex. slows down execution a lot, 468 * normal read/write by using a mutex. slows down execution a lot,
341 * but that's your problem, not mine. 469 * but that's your problem, not mine.
342 */ 470 */
343static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 471static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
344 472
345static ssize_t 473static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
346pread (int fd, void *buf, size_t count, off_t offset)
347{ 474{
348 ssize_t res; 475 ssize_t res;
349 off_t ooffset; 476 off_t ooffset;
350 477
351 pthread_mutex_lock (&iolock); 478 pthread_mutex_lock (&preadwritelock);
352 ooffset = lseek (fd, 0, SEEK_CUR); 479 ooffset = lseek (fd, 0, SEEK_CUR);
353 lseek (fd, offset, SEEK_SET); 480 lseek (fd, offset, SEEK_SET);
354 res = read (fd, buf, count); 481 res = read (fd, buf, count);
355 lseek (fd, ooffset, SEEK_SET); 482 lseek (fd, ooffset, SEEK_SET);
356 pthread_mutex_unlock (&iolock); 483 pthread_mutex_unlock (&preadwritelock);
357 484
358 return res; 485 return res;
359} 486}
360 487
361static ssize_t
362pwrite (int fd, void *buf, size_t count, off_t offset) 488static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
363{ 489{
364 ssize_t res; 490 ssize_t res;
365 off_t ooffset; 491 off_t ooffset;
366 492
367 pthread_mutex_lock (&iolock); 493 pthread_mutex_lock (&preadwritelock);
368 ooffset = lseek (fd, 0, SEEK_CUR); 494 ooffset = lseek (fd, 0, SEEK_CUR);
369 lseek (fd, offset, SEEK_SET); 495 lseek (fd, offset, SEEK_SET);
370 res = write (fd, buf, count); 496 res = write (fd, buf, count);
371 lseek (fd, offset, SEEK_SET); 497 lseek (fd, offset, SEEK_SET);
372 pthread_mutex_unlock (&iolock); 498 pthread_mutex_unlock (&preadwritelock);
373 499
374 return res; 500 return res;
375} 501}
376#endif 502#endif
377 503
… …
380#endif 506#endif
381 507
382#if !HAVE_READAHEAD 508#if !HAVE_READAHEAD
383# define readahead aio_readahead 509# define readahead aio_readahead
384 510
511static ssize_t readahead (int fd, off_t offset, size_t count)
512{
385static char readahead_buf[4096]; 513 char readahead_buf[4096];
386 514
387static ssize_t
388readahead (int fd, off_t offset, size_t count)
389{
390 while (count > 0) 515 while (count > 0)
391 { 516 {
392 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 517 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
393 518
394 pread (fd, readahead_buf, len, offset); 519 pread (fd, readahead_buf, len, offset);
… …
398 523
399 errno = 0; 524 errno = 0;
400} 525}
401#endif 526#endif
402 527
528#if !HAVE_READDIR_R
529# define readdir_r aio_readdir_r
530
531static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
532
533static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
534{
535 struct dirent *e;
536 int errorno;
537
538 pthread_mutex_lock (&readdirlock);
539
540 e = readdir (dirp);
541 errorno = errno;
542
543 if (e)
544 {
545 *res = ent;
546 strcpy (ent->d_name, e->d_name);
547 }
548 else
549 *res = 0;
550
551 pthread_mutex_unlock (&readdirlock);
552
553 errno = errorno;
554 return e ? 0 : -1;
555}
556#endif
557
558/* sendfile always needs emulation */
559static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
560{
561 ssize_t res;
562
563 if (!count)
564 return 0;
565
566#if HAVE_SENDFILE
567# if __linux
568 res = sendfile (ofd, ifd, &offset, count);
569
570# elif __freebsd
571 /*
572 * Of course, the freebsd sendfile is a dire hack with no thoughts
573 * wasted on making it similar to other I/O functions.
574 */
575 {
576 off_t sbytes;
577 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
578
579 if (res < 0 && sbytes)
580 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
581 res = sbytes;
582 }
583
584# elif __hpux
585 res = sendfile (ofd, ifd, offset, count, 0, 0);
586
587# elif __solaris
588 {
589 struct sendfilevec vec;
590 size_t sbytes;
591
592 vec.sfv_fd = ifd;
593 vec.sfv_flag = 0;
594 vec.sfv_off = offset;
595 vec.sfv_len = count;
596
597 res = sendfilev (ofd, &vec, 1, &sbytes);
598
599 if (res < 0 && sbytes)
600 res = sbytes;
601 }
602
603# endif
604#else
605 res = -1;
606 errno = ENOSYS;
607#endif
608
609 if (res < 0
610 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
611#if __solaris
612 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
613#endif
614 )
615 )
616 {
617 /* emulate sendfile. this is a major pain in the ass */
618 char buf[4096];
619 res = 0;
620
621 while (count)
622 {
623 ssize_t cnt;
624
625 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
626
627 if (cnt <= 0)
628 {
629 if (cnt && !res) res = -1;
630 break;
631 }
632
633 cnt = write (ofd, buf, cnt);
634
635 if (cnt <= 0)
636 {
637 if (cnt && !res) res = -1;
638 break;
639 }
640
641 offset += cnt;
642 res += cnt;
643 count -= cnt;
644 }
645 }
646
647 return res;
648}
649
650/* read a full directory */
651static int scandir_ (const char *path, void **namesp)
652{
653 DIR *dirp = opendir (path);
654 union
655 {
656 struct dirent d;
657 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
658 } u;
659 struct dirent *entp;
660 char *name, *names;
661 int memlen = 4096;
662 int memofs = 0;
663 int res = 0;
664 int errorno;
665
666 if (!dirp)
667 return -1;
668
669 names = malloc (memlen);
670
671 for (;;)
672 {
673 errno = 0, readdir_r (dirp, &u.d, &entp);
674
675 if (!entp)
676 break;
677
678 name = entp->d_name;
679
680 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
681 {
682 int len = strlen (name) + 1;
683
684 res++;
685
686 while (memofs + len > memlen)
687 {
688 memlen *= 2;
689 names = realloc (names, memlen);
690 if (!names)
691 break;
692 }
693
694 memcpy (names + memofs, name, len);
695 memofs += len;
696 }
697 }
698
699 errorno = errno;
700 closedir (dirp);
701
702 if (errorno)
703 {
704 free (names);
705 errno = errorno;
706 res = -1;
707 }
708
709 *namesp = (void *)names;
710 return res;
711}
712
403/*****************************************************************************/ 713/*****************************************************************************/
404 714
405static void *
406aio_proc (void *thr_arg) 715static void *aio_proc (void *thr_arg)
407{ 716{
408 aio_req req; 717 aio_req req;
409 int type; 718 int type;
410 719
411 do 720 do
… …
430 739
431 pthread_mutex_unlock (&reqlock); 740 pthread_mutex_unlock (&reqlock);
432 741
433 errno = 0; /* strictly unnecessary */ 742 errno = 0; /* strictly unnecessary */
434 743
435 type = req->type; 744 if (!req->cancelled)
436
437 switch (type) 745 switch (req->type)
438 { 746 {
439 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 747 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
440 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 748 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
441 749
442 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 750 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
751 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
443 752
444 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 753 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
445 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 754 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
446 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 755 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
447 756
448 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 757 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
449 case REQ_CLOSE: req->result = close (req->fd); break; 758 case REQ_CLOSE: req->result = close (req->fd); break;
450 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 759 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
451 case REQ_RMDIR: req->result = rmdir (req->dataptr); break; 760 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
761 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
762 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
452 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 763 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
453 764
454 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 765 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
455 case REQ_FSYNC: req->result = fsync (req->fd); break; 766 case REQ_FSYNC: req->result = fsync (req->fd); break;
767 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
456 768
769 case REQ_SLEEP:
770 {
771 struct timeval tv;
772
773 tv.tv_sec = req->fd;
774 tv.tv_usec = req->fd2;
775
776 req->result = select (0, 0, 0, 0, &tv);
777 }
778
457 case REQ_QUIT: 779 case REQ_QUIT:
458 break; 780 break;
459 781
460 default: 782 default:
461 req->result = ENOSYS; 783 req->result = ENOSYS;
462 break; 784 break;
463 } 785 }
464 786
465 req->errorno = errno; 787 req->errorno = errno;
466 788
467 pthread_mutex_lock (&reslock); 789 pthread_mutex_lock (&reslock);
468 790
… …
486 while (type != REQ_QUIT); 808 while (type != REQ_QUIT);
487 809
488 return 0; 810 return 0;
489} 811}
490 812
813/*****************************************************************************/
814
815static void atfork_prepare (void)
816{
817 pthread_mutex_lock (&reqlock);
818 pthread_mutex_lock (&reslock);
819#if !HAVE_PREADWRITE
820 pthread_mutex_lock (&preadwritelock);
821#endif
822#if !HAVE_READDIR_R
823 pthread_mutex_lock (&readdirlock);
824#endif
825}
826
827static void atfork_parent (void)
828{
829#if !HAVE_READDIR_R
830 pthread_mutex_unlock (&readdirlock);
831#endif
832#if !HAVE_PREADWRITE
833 pthread_mutex_unlock (&preadwritelock);
834#endif
835 pthread_mutex_unlock (&reslock);
836 pthread_mutex_unlock (&reqlock);
837}
838
839static void atfork_child (void)
840{
841 aio_req prv;
842
843 started = 0;
844
845 while (reqs)
846 {
847 prv = reqs;
848 reqs = prv->next;
849 req_free (prv);
850 }
851
852 reqs = reqe = 0;
853
854 while (ress)
855 {
856 prv = ress;
857 ress = prv->next;
858 req_free (prv);
859 }
860
861 ress = rese = 0;
862
863 close (respipe [0]);
864 close (respipe [1]);
865 create_pipe ();
866
867 atfork_parent ();
868}
869
491#define dREQ \ 870#define dREQ \
492 aio_req req; \ 871 aio_req req; \
493 \ 872 \
494 if (SvOK (callback) && !SvROK (callback)) \ 873 if (SvOK (callback) && !SvROK (callback)) \
495 croak ("clalback must be undef or of reference type"); \ 874 croak ("callback must be undef or of reference type"); \
496 \ 875 \
497 Newz (0, req, 1, aio_cb); \ 876 Newz (0, req, 1, aio_cb); \
498 if (!req) \ 877 if (!req) \
499 croak ("out of memory during aio_req allocation"); \ 878 croak ("out of memory during aio_req allocation"); \
500 \ 879 \
501 req->callback = SvREFCNT_inc (callback); 880 req->callback = newSVsv (callback)
881
882#define REQ_SEND \
883 req_send (req); \
884 \
885 if (GIMME_V != G_VOID) \
886 XPUSHs (req_sv (req, AIO_REQ_KLASS));
502 887
503MODULE = IO::AIO PACKAGE = IO::AIO 888MODULE = IO::AIO PACKAGE = IO::AIO
504 889
505PROTOTYPES: ENABLE 890PROTOTYPES: ENABLE
506 891
507BOOT: 892BOOT:
508{ 893{
894 HV *stash = gv_stashpv ("IO::AIO", 1);
895 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
896 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
897 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
898
509 create_pipe (); 899 create_pipe ();
510 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 900 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
511} 901}
512 902
513void 903void
514min_parallel(nthreads) 904min_parallel (nthreads)
515 int nthreads 905 int nthreads
516 PROTOTYPE: $ 906 PROTOTYPE: $
517 907
518void 908void
519max_parallel(nthreads) 909max_parallel (nthreads)
520 int nthreads 910 int nthreads
521 PROTOTYPE: $ 911 PROTOTYPE: $
522 912
523int 913int
524max_outstanding(nreqs) 914max_outstanding (nreqs)
525 int nreqs 915 int nreqs
526 PROTOTYPE: $ 916 PROTOTYPE: $
527 CODE: 917 CODE:
528 RETVAL = max_outstanding; 918 RETVAL = max_outstanding;
529 max_outstanding = nreqs; 919 max_outstanding = nreqs;
530 920
531void 921void
532aio_open(pathname,flags,mode,callback=&PL_sv_undef) 922aio_open (pathname,flags,mode,callback=&PL_sv_undef)
533 SV * pathname 923 SV * pathname
534 int flags 924 int flags
535 int mode 925 int mode
536 SV * callback 926 SV * callback
537 PROTOTYPE: $$$;$ 927 PROTOTYPE: $$$;$
538 CODE: 928 PPCODE:
539{ 929{
540 dREQ; 930 dREQ;
541 931
542 req->type = REQ_OPEN; 932 req->type = REQ_OPEN;
543 req->data = newSVsv (pathname); 933 req->data = newSVsv (pathname);
544 req->dataptr = SvPVbyte_nolen (req->data); 934 req->dataptr = SvPVbyte_nolen (req->data);
545 req->fd = flags; 935 req->fd = flags;
546 req->mode = mode; 936 req->mode = mode;
547 937
548 send_req (req); 938 REQ_SEND;
549} 939}
550 940
551void 941void
552aio_close(fh,callback=&PL_sv_undef) 942aio_close (fh,callback=&PL_sv_undef)
553 SV * fh 943 SV * fh
554 SV * callback 944 SV * callback
555 PROTOTYPE: $;$ 945 PROTOTYPE: $;$
556 ALIAS: 946 ALIAS:
557 aio_close = REQ_CLOSE 947 aio_close = REQ_CLOSE
558 aio_fsync = REQ_FSYNC 948 aio_fsync = REQ_FSYNC
559 aio_fdatasync = REQ_FDATASYNC 949 aio_fdatasync = REQ_FDATASYNC
560 CODE: 950 PPCODE:
561{ 951{
562 dREQ; 952 dREQ;
563 953
564 req->type = ix; 954 req->type = ix;
565 req->fh = newSVsv (fh); 955 req->fh = newSVsv (fh);
566 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 956 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
567 957
568 send_req (req); 958 REQ_SEND (req);
569} 959}
570 960
571void 961void
572aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 962aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
573 SV * fh 963 SV * fh
574 UV offset 964 UV offset
575 IV length 965 UV length
576 SV * data 966 SV * data
577 IV dataoffset 967 UV dataoffset
578 SV * callback 968 SV * callback
579 ALIAS: 969 ALIAS:
580 aio_read = REQ_READ 970 aio_read = REQ_READ
581 aio_write = REQ_WRITE 971 aio_write = REQ_WRITE
582 PROTOTYPE: $$$$$;$ 972 PROTOTYPE: $$$$$;$
583 CODE: 973 PPCODE:
584{ 974{
585 aio_req req; 975 aio_req req;
586 STRLEN svlen; 976 STRLEN svlen;
587 char *svptr = SvPVbyte (data, svlen); 977 char *svptr = SvPVbyte (data, svlen);
588 978
… …
619 : IoOFP (sv_2io (fh))); 1009 : IoOFP (sv_2io (fh)));
620 req->offset = offset; 1010 req->offset = offset;
621 req->length = length; 1011 req->length = length;
622 req->data = SvREFCNT_inc (data); 1012 req->data = SvREFCNT_inc (data);
623 req->dataptr = (char *)svptr + dataoffset; 1013 req->dataptr = (char *)svptr + dataoffset;
624 req->callback = SvREFCNT_inc (callback);
625 1014
626 send_req (req); 1015 if (!SvREADONLY (data))
1016 {
1017 SvREADONLY_on (data);
1018 req->data2ptr = (void *)data;
1019 }
1020
1021 REQ_SEND;
627 } 1022 }
628} 1023}
629 1024
630void 1025void
1026aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1027 SV * out_fh
1028 SV * in_fh
1029 UV in_offset
1030 UV length
1031 SV * callback
1032 PROTOTYPE: $$$$;$
1033 PPCODE:
1034{
1035 dREQ;
1036
1037 req->type = REQ_SENDFILE;
1038 req->fh = newSVsv (out_fh);
1039 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1040 req->fh2 = newSVsv (in_fh);
1041 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1042 req->offset = in_offset;
1043 req->length = length;
1044
1045 REQ_SEND;
1046}
1047
1048void
631aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1049aio_readahead (fh,offset,length,callback=&PL_sv_undef)
632 SV * fh 1050 SV * fh
633 UV offset 1051 UV offset
634 IV length 1052 IV length
635 SV * callback 1053 SV * callback
636 PROTOTYPE: $$$;$ 1054 PROTOTYPE: $$$;$
637 CODE: 1055 PPCODE:
638{ 1056{
639 dREQ; 1057 dREQ;
640 1058
641 req->type = REQ_READAHEAD; 1059 req->type = REQ_READAHEAD;
642 req->fh = newSVsv (fh); 1060 req->fh = newSVsv (fh);
643 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1061 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
644 req->offset = offset; 1062 req->offset = offset;
645 req->length = length; 1063 req->length = length;
646 1064
647 send_req (req); 1065 REQ_SEND;
648} 1066}
649 1067
650void 1068void
651aio_stat(fh_or_path,callback=&PL_sv_undef) 1069aio_stat (fh_or_path,callback=&PL_sv_undef)
652 SV * fh_or_path 1070 SV * fh_or_path
653 SV * callback 1071 SV * callback
654 ALIAS: 1072 ALIAS:
655 aio_stat = REQ_STAT 1073 aio_stat = REQ_STAT
656 aio_lstat = REQ_LSTAT 1074 aio_lstat = REQ_LSTAT
657 CODE: 1075 PPCODE:
658{ 1076{
659 dREQ; 1077 dREQ;
660 1078
661 New (0, req->statdata, 1, Stat_t); 1079 New (0, req->statdata, 1, Stat_t);
662 if (!req->statdata) 1080 if (!req->statdata)
1081 {
1082 req_free (req);
663 croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)"); 1083 croak ("out of memory during aio_req->statdata allocation");
1084 }
664 1085
665 if (SvPOK (fh_or_path)) 1086 if (SvPOK (fh_or_path))
666 { 1087 {
667 req->type = ix; 1088 req->type = ix;
668 req->data = newSVsv (fh_or_path); 1089 req->data = newSVsv (fh_or_path);
… …
673 req->type = REQ_FSTAT; 1094 req->type = REQ_FSTAT;
674 req->fh = newSVsv (fh_or_path); 1095 req->fh = newSVsv (fh_or_path);
675 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1096 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
676 } 1097 }
677 1098
678 send_req (req); 1099 REQ_SEND;
679} 1100}
680 1101
681void 1102void
682aio_unlink(pathname,callback=&PL_sv_undef) 1103aio_unlink (pathname,callback=&PL_sv_undef)
683 SV * pathname 1104 SV * pathname
684 SV * callback 1105 SV * callback
685 ALIAS: 1106 ALIAS:
686 aio_unlink = REQ_UNLINK 1107 aio_unlink = REQ_UNLINK
687 aio_rmdir = REQ_RMDIR 1108 aio_rmdir = REQ_RMDIR
1109 aio_readdir = REQ_READDIR
688 CODE: 1110 PPCODE:
689{ 1111{
690 dREQ; 1112 dREQ;
691 1113
692 req->type = ix; 1114 req->type = ix;
693 req->data = newSVsv (pathname); 1115 req->data = newSVsv (pathname);
694 req->dataptr = SvPVbyte_nolen (req->data); 1116 req->dataptr = SvPVbyte_nolen (req->data);
695 1117
696 send_req (req); 1118 REQ_SEND;
697} 1119}
698 1120
699void 1121void
700aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1122aio_link (oldpath,newpath,callback=&PL_sv_undef)
701 SV * oldpath 1123 SV * oldpath
702 SV * newpath 1124 SV * newpath
703 SV * callback 1125 SV * callback
1126 ALIAS:
1127 aio_link = REQ_LINK
1128 aio_symlink = REQ_SYMLINK
1129 aio_rename = REQ_RENAME
704 CODE: 1130 PPCODE:
705{ 1131{
706 dREQ; 1132 dREQ;
707 1133
708 req->type = REQ_SYMLINK; 1134 req->type = ix;
709 req->fh = newSVsv (oldpath); 1135 req->fh = newSVsv (oldpath);
710 req->data2ptr = SvPVbyte_nolen (req->fh); 1136 req->data2ptr = SvPVbyte_nolen (req->fh);
711 req->data = newSVsv (newpath); 1137 req->data = newSVsv (newpath);
712 req->dataptr = SvPVbyte_nolen (req->data); 1138 req->dataptr = SvPVbyte_nolen (req->data);
713 1139
714 send_req (req); 1140 REQ_SEND;
715} 1141}
716 1142
717void 1143void
1144aio_sleep (delay,callback=&PL_sv_undef)
1145 double delay
1146 SV * callback
1147 PPCODE:
1148{
1149 dREQ;
1150
1151 req->type = REQ_SLEEP;
1152 req->fd = delay < 0. ? 0 : delay;
1153 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1154
1155 REQ_SEND;
1156}
1157
1158void
1159aio_group (callback=&PL_sv_undef)
1160 SV * callback
1161 PROTOTYPE: ;$
1162 PPCODE:
1163{
1164 dREQ;
1165 req->type = REQ_GROUP;
1166 req->grp_next = req;
1167 req->grp_prev = req;
1168
1169 req_send (req);
1170 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1171}
1172
1173void
718flush() 1174flush ()
719 PROTOTYPE: 1175 PROTOTYPE:
720 CODE: 1176 CODE:
721 while (nreqs) 1177 while (nreqs)
722 { 1178 {
723 poll_wait (); 1179 poll_wait ();
… …
763 CODE: 1219 CODE:
764 RETVAL = nreqs; 1220 RETVAL = nreqs;
765 OUTPUT: 1221 OUTPUT:
766 RETVAL 1222 RETVAL
767 1223
1224PROTOTYPES: DISABLE
1225
1226MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1227
1228void
1229cancel (aio_req_ornot req)
1230 PROTOTYPE:
1231 CODE:
1232 req_cancel (req);
1233
1234MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1235
1236void
1237add (aio_req grp, ...)
1238 PPCODE:
1239{
1240 int i;
1241
1242 for (i = 1; i < items; ++i )
1243 {
1244 if (GIMME_V != G_VOID)
1245 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1246
1247 aio_req req = SvAIO_REQ (ST (i));
1248
1249 if (req)
1250 {
1251 req->grp_prev = grp;
1252 req->grp_next = grp->grp_next;
1253 grp->grp_next->grp_prev = req;
1254 grp->grp_next = req;
1255
1256 req->grp = grp;
1257 }
1258 }
1259}
1260
1261void
1262result (aio_req grp, ...)
1263 CODE:
1264{
1265 int i;
1266 AV *av = newAV ();
1267
1268 if (grp->data)
1269 SvREFCNT_dec (grp->data);
1270
1271 for (i = 1; i < items; ++i )
1272 av_push (av, newSVsv (ST (i)));
1273
1274 grp->data = (SV *)av;
1275}
1276

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