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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.24 by root, Wed Aug 17 03:01:56 2005 UTC vs.
Revision 1.50 by root, Sun Oct 22 21:13:47 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{
41 struct aio_cb *volatile next; 69 struct aio_cb *volatile next;
42 70
43 int type; 71 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
44 72
45 int fd; 73 SV *self; /* the perl counterpart of this request, if any */
74
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 106static void req_invoke (aio_req req);
74poll_wait () 107static void req_free (aio_req req);
108
109/* must be called at most once */
110static SV *req_sv (aio_req req, const char *klass)
111{
112 if (!req->self)
113 {
114 req->self = (SV *)newHV ();
115 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
116 }
117
118 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
119}
120
121static aio_req SvAIO_REQ (SV *sv)
122{
123 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
124 croak ("object of class " AIO_REQ_KLASS " expected");
125
126 MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
127
128 return mg ? (aio_req)mg->mg_ptr : 0;
129}
130
131static void aio_grp_feed (aio_req grp)
132{
133 while (grp->length < grp->fd2)
134 {
135 int old_len = grp->length;
136
137 if (grp->fh2 && SvOK (grp->fh2))
138 {
139 dSP;
140
141 ENTER;
142 SAVETMPS;
143 PUSHMARK (SP);
144 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
145 PUTBACK;
146 call_sv (grp->fh2, G_VOID | G_EVAL);
147 SPAGAIN;
148 FREETMPS;
149 LEAVE;
150 }
151
152 /* stop if no progress has been made */
153 if (old_len == grp->length)
154 {
155 SvREFCNT_dec (grp->fh2);
156 grp->fh2 = 0;
157 break;
158 }
159 }
160}
161
162static void aio_grp_dec (aio_req grp)
163{
164 --grp->length;
165
166 /* call feeder, if applicable */
167 aio_grp_feed (grp);
168
169 /* finish, if done */
170 if (!grp->length && grp->fd)
171 {
172 req_invoke (grp);
173 req_free (grp);
174 }
175}
176
177static void poll_wait ()
75{ 178{
76 if (nreqs && !ress) 179 if (nreqs && !ress)
77 { 180 {
78 fd_set rfd; 181 fd_set rfd;
79 FD_ZERO(&rfd); 182 FD_ZERO(&rfd);
… …
81 184
82 select (respipe [0] + 1, &rfd, 0, 0, 0); 185 select (respipe [0] + 1, &rfd, 0, 0, 0);
83 } 186 }
84} 187}
85 188
86static int 189static void req_invoke (aio_req req)
87poll_cb () 190{
191 dSP;
192 int errorno = errno;
193
194 if (req->cancelled || !SvOK (req->callback))
195 return;
196
197 errno = req->errorno;
198
199 ENTER;
200 SAVETMPS;
201 PUSHMARK (SP);
202 EXTEND (SP, 1);
203
204 switch (req->type)
205 {
206 case REQ_READDIR:
207 {
208 SV *rv = &PL_sv_undef;
209
210 if (req->result >= 0)
211 {
212 char *buf = req->data2ptr;
213 AV *av = newAV ();
214
215 while (req->result)
216 {
217 SV *sv = newSVpv (buf, 0);
218
219 av_push (av, sv);
220 buf += SvCUR (sv) + 1;
221 req->result--;
222 }
223
224 rv = sv_2mortal (newRV_noinc ((SV *)av));
225 }
226
227 PUSHs (rv);
228 }
229 break;
230
231 case REQ_OPEN:
232 {
233 /* convert fd to fh */
234 SV *fh;
235
236 PUSHs (sv_2mortal (newSViv (req->result)));
237 PUTBACK;
238 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
239 SPAGAIN;
240
241 fh = SvREFCNT_inc (POPs);
242
243 PUSHMARK (SP);
244 XPUSHs (sv_2mortal (fh));
245 }
246 break;
247
248 case REQ_GROUP:
249 req->fd = 2; /* mark group as finished */
250
251 if (req->data)
252 {
253 int i;
254 AV *av = (AV *)req->data;
255
256 EXTEND (SP, AvFILL (av) + 1);
257 for (i = 0; i <= AvFILL (av); ++i)
258 PUSHs (*av_fetch (av, i, 0));
259 }
260 break;
261
262 case REQ_SLEEP:
263 break;
264
265 default:
266 PUSHs (sv_2mortal (newSViv (req->result)));
267 break;
268 }
269
270
271 PUTBACK;
272 call_sv (req->callback, G_VOID | G_EVAL);
273 SPAGAIN;
274
275 if (SvTRUE (ERRSV))
276 {
277 req_free (req);
278 croak (0);
279 }
280
281 FREETMPS;
282 LEAVE;
283
284 errno = errorno;
285}
286
287static void req_free (aio_req req)
288{
289 if (req->grp)
290 {
291 aio_req grp = req->grp;
292
293 /* unlink request */
294 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
295 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
296
297 if (grp->grp_first == req)
298 grp->grp_first = req->grp_next;
299
300 aio_grp_dec (grp);
301 }
302
303 if (req->self)
304 {
305 sv_unmagic (req->self, PERL_MAGIC_ext);
306 SvREFCNT_dec (req->self);
307 }
308
309 SvREFCNT_dec (req->data);
310 SvREFCNT_dec (req->fh);
311 SvREFCNT_dec (req->fh2);
312 SvREFCNT_dec (req->callback);
313 Safefree (req->statdata);
314
315 if (req->type == REQ_READDIR && req->result >= 0)
316 free (req->data2ptr);
317
318 Safefree (req);
319}
320
321static void req_cancel (aio_req req)
322{
323 req->cancelled = 1;
324
325 if (req->type == REQ_GROUP)
326 {
327 aio_req sub;
328
329 for (sub = req->grp_first; sub; sub = sub->grp_next)
330 req_cancel (sub);
331 }
332}
333
334static int poll_cb ()
88{ 335{
89 dSP; 336 dSP;
90 int count = 0; 337 int count = 0;
91 int do_croak = 0; 338 int do_croak = 0;
92 aio_req req, prv; 339 aio_req req;
93 340
341 for (;;)
342 {
94 pthread_mutex_lock (&reslock); 343 pthread_mutex_lock (&reslock);
344 req = ress;
95 345
96 { 346 if (req)
347 {
348 ress = req->next;
349
350 if (!ress)
351 {
97 /* read any signals sent by the worker threads */ 352 /* read any signals sent by the worker threads */
98 char buf [32]; 353 char buf [32];
99 while (read (respipe [0], buf, 32) == 32) 354 while (read (respipe [0], buf, 32) == 32)
355 ;
356
357 rese = 0;
358 }
100 ; 359 }
101 }
102 360
103 req = ress;
104 ress = rese = 0;
105
106 pthread_mutex_unlock (&reslock); 361 pthread_mutex_unlock (&reslock);
107 362
108 while (req) 363 if (!req)
109 { 364 break;
365
110 nreqs--; 366 --nreqs;
111 367
112 if (req->type == REQ_QUIT) 368 if (req->type == REQ_QUIT)
113 started--; 369 started--;
370 else if (req->type == REQ_GROUP && req->length)
371 {
372 req->fd = 1; /* mark request as delayed */
373 continue;
374 }
114 else 375 else
115 { 376 {
116 int errorno = errno;
117 errno = req->errorno;
118
119 if (req->type == REQ_READ) 377 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset 378 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121 + req->result > 0 ? req->result : 0);
122 379
380 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
381 SvREADONLY_off (req->data);
382
123 if (req->data) 383 if (req->statdata)
124 SvREFCNT_dec (req->data);
125
126 if (req->fh)
127 SvREFCNT_dec (req->fh);
128
129 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
130 { 384 {
131 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 385 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
132 PL_laststatval = req->result; 386 PL_laststatval = req->result;
133 PL_statcache = *(req->statdata); 387 PL_statcache = *(req->statdata);
134
135 Safefree (req->statdata);
136 } 388 }
137 389
138 ENTER; 390 req_invoke (req);
139 PUSHMARK (SP);
140 XPUSHs (sv_2mortal (newSViv (req->result)));
141 391
142 if (req->type == REQ_OPEN)
143 {
144 /* convert fd to fh */
145 SV *fh;
146
147 PUTBACK;
148 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149 SPAGAIN;
150
151 fh = SvREFCNT_inc (POPs);
152
153 PUSHMARK (SP);
154 XPUSHs (sv_2mortal (fh));
155 }
156
157 if (SvOK (req->callback))
158 {
159 PUTBACK;
160 call_sv (req->callback, G_VOID | G_EVAL);
161 SPAGAIN;
162 }
163
164 do_croak = SvTRUE (ERRSV);
165
166 LEAVE;
167
168 if (req->callback)
169 SvREFCNT_dec (req->callback);
170
171 errno = errorno;
172 count++; 392 count++;
173 } 393 }
174 394
175 prv = req;
176 req = req->next;
177 Safefree (prv); 395 req_free (req);
178
179 if (do_croak)
180 croak (0);
181 } 396 }
182 397
183 return count; 398 return count;
184} 399}
185 400
186static void *aio_proc(void *arg); 401static void *aio_proc(void *arg);
187 402
188static void
189start_thread (void) 403static void start_thread (void)
190{ 404{
191 sigset_t fullsigset, oldsigset; 405 sigset_t fullsigset, oldsigset;
192 pthread_t tid; 406 pthread_t tid;
193 pthread_attr_t attr; 407 pthread_attr_t attr;
194 408
… …
203 started++; 417 started++;
204 418
205 sigprocmask (SIG_SETMASK, &oldsigset, 0); 419 sigprocmask (SIG_SETMASK, &oldsigset, 0);
206} 420}
207 421
208static void 422static void req_send (aio_req req)
209send_req (aio_req req)
210{ 423{
424 while (started < wanted && nreqs >= started)
425 start_thread ();
426
211 nreqs++; 427 ++nreqs;
212 428
213 pthread_mutex_lock (&reqlock); 429 pthread_mutex_lock (&reqlock);
214 430
215 req->next = 0; 431 req->next = 0;
216 432
… …
223 reqe = reqs = req; 439 reqe = reqs = req;
224 440
225 pthread_cond_signal (&reqwait); 441 pthread_cond_signal (&reqwait);
226 pthread_mutex_unlock (&reqlock); 442 pthread_mutex_unlock (&reqlock);
227 443
228 while (nreqs > max_outstanding) 444 if (nreqs > max_outstanding)
445 for (;;)
446 {
447 poll_cb ();
448
449 if (nreqs <= max_outstanding)
450 break;
451
452 poll_wait ();
453 }
454}
455
456static void end_thread (void)
457{
458 aio_req req;
459 Newz (0, req, 1, aio_cb);
460 req->type = REQ_QUIT;
461
462 req_send (req);
463}
464
465static void min_parallel (int nthreads)
466{
467 if (wanted < nthreads)
468 wanted = nthreads;
469}
470
471static void max_parallel (int nthreads)
472{
473 int cur = started;
474
475 if (wanted > nthreads)
476 wanted = nthreads;
477
478 while (cur > wanted)
479 {
480 end_thread ();
481 cur--;
482 }
483
484 while (started > wanted)
229 { 485 {
230 poll_wait (); 486 poll_wait ();
231 poll_cb (); 487 poll_cb ();
232 } 488 }
233} 489}
234 490
235static void 491static void create_pipe ()
236end_thread (void)
237{ 492{
238 aio_req req; 493 if (pipe (respipe))
239 New (0, req, 1, aio_cb); 494 croak ("unable to initialize result pipe");
240 req->type = REQ_QUIT;
241 495
242 send_req (req); 496 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
243} 497 croak ("cannot set result pipe to nonblocking mode");
244 498
245 499 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
246static void min_parallel (int nthreads) 500 croak ("cannot set result pipe to nonblocking mode");
247{
248 while (nthreads > started)
249 start_thread ();
250}
251
252static void max_parallel (int nthreads)
253{
254 int cur = started;
255 while (cur > nthreads)
256 {
257 end_thread ();
258 cur--;
259 }
260
261 while (started > nthreads)
262 {
263 poll_wait ();
264 poll_cb ();
265 }
266}
267
268static int fork_started;
269
270static void atfork_prepare (void)
271{
272 pthread_mutex_lock (&frklock);
273
274 fork_started = started;
275
276 for (;;) {
277 while (nreqs)
278 {
279 poll_wait ();
280 poll_cb ();
281 }
282
283 max_parallel (0);
284
285 pthread_mutex_lock (&reqlock);
286
287 if (!nreqs && !started)
288 break;
289
290 pthread_mutex_unlock (&reqlock);
291
292 min_parallel (fork_started);
293 }
294
295 pthread_mutex_lock (&reslock);
296
297 assert (!started);
298 assert (!nreqs);
299 assert (!reqs && !reqe);
300 assert (!ress && !rese);
301}
302
303static void atfork_parent (void)
304{
305 pthread_mutex_unlock (&reslock);
306 min_parallel (fork_started);
307 pthread_mutex_unlock (&reqlock);
308 pthread_mutex_unlock (&frklock);
309}
310
311static void atfork_child (void)
312{
313 reqs = reqe = 0;
314
315 atfork_parent ();
316} 501}
317 502
318/*****************************************************************************/ 503/*****************************************************************************/
319/* work around various missing functions */ 504/* work around various missing functions */
320 505
… …
325/* 510/*
326 * make our pread/pwrite safe against themselves, but not against 511 * make our pread/pwrite safe against themselves, but not against
327 * normal read/write by using a mutex. slows down execution a lot, 512 * normal read/write by using a mutex. slows down execution a lot,
328 * but that's your problem, not mine. 513 * but that's your problem, not mine.
329 */ 514 */
330static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 515static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
331 516
332static ssize_t 517static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
333pread (int fd, void *buf, size_t count, off_t offset)
334{ 518{
335 ssize_t res; 519 ssize_t res;
336 off_t ooffset; 520 off_t ooffset;
337 521
338 pthread_mutex_lock (&iolock); 522 pthread_mutex_lock (&preadwritelock);
339 ooffset = lseek (fd, 0, SEEK_CUR); 523 ooffset = lseek (fd, 0, SEEK_CUR);
340 lseek (fd, offset, SEEK_SET); 524 lseek (fd, offset, SEEK_SET);
341 res = read (fd, buf, count); 525 res = read (fd, buf, count);
342 lseek (fd, ooffset, SEEK_SET); 526 lseek (fd, ooffset, SEEK_SET);
343 pthread_mutex_unlock (&iolock); 527 pthread_mutex_unlock (&preadwritelock);
344 528
345 return res; 529 return res;
346} 530}
347 531
348static ssize_t
349pwrite (int fd, void *buf, size_t count, off_t offset) 532static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
350{ 533{
351 ssize_t res; 534 ssize_t res;
352 off_t ooffset; 535 off_t ooffset;
353 536
354 pthread_mutex_lock (&iolock); 537 pthread_mutex_lock (&preadwritelock);
355 ooffset = lseek (fd, 0, SEEK_CUR); 538 ooffset = lseek (fd, 0, SEEK_CUR);
356 lseek (fd, offset, SEEK_SET); 539 lseek (fd, offset, SEEK_SET);
357 res = write (fd, buf, count); 540 res = write (fd, buf, count);
358 lseek (fd, offset, SEEK_SET); 541 lseek (fd, offset, SEEK_SET);
359 pthread_mutex_unlock (&iolock); 542 pthread_mutex_unlock (&preadwritelock);
360 543
361 return res; 544 return res;
362} 545}
363#endif 546#endif
364 547
… …
367#endif 550#endif
368 551
369#if !HAVE_READAHEAD 552#if !HAVE_READAHEAD
370# define readahead aio_readahead 553# define readahead aio_readahead
371 554
555static ssize_t readahead (int fd, off_t offset, size_t count)
556{
372static char readahead_buf[4096]; 557 char readahead_buf[4096];
373 558
374static ssize_t
375readahead (int fd, off_t offset, size_t count)
376{
377 while (count > 0) 559 while (count > 0)
378 { 560 {
379 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 561 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
380 562
381 pread (fd, readahead_buf, len, offset); 563 pread (fd, readahead_buf, len, offset);
… …
385 567
386 errno = 0; 568 errno = 0;
387} 569}
388#endif 570#endif
389 571
572#if !HAVE_READDIR_R
573# define readdir_r aio_readdir_r
574
575static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
576
577static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
578{
579 struct dirent *e;
580 int errorno;
581
582 pthread_mutex_lock (&readdirlock);
583
584 e = readdir (dirp);
585 errorno = errno;
586
587 if (e)
588 {
589 *res = ent;
590 strcpy (ent->d_name, e->d_name);
591 }
592 else
593 *res = 0;
594
595 pthread_mutex_unlock (&readdirlock);
596
597 errno = errorno;
598 return e ? 0 : -1;
599}
600#endif
601
602/* sendfile always needs emulation */
603static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
604{
605 ssize_t res;
606
607 if (!count)
608 return 0;
609
610#if HAVE_SENDFILE
611# if __linux
612 res = sendfile (ofd, ifd, &offset, count);
613
614# elif __freebsd
615 /*
616 * Of course, the freebsd sendfile is a dire hack with no thoughts
617 * wasted on making it similar to other I/O functions.
618 */
619 {
620 off_t sbytes;
621 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
622
623 if (res < 0 && sbytes)
624 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
625 res = sbytes;
626 }
627
628# elif __hpux
629 res = sendfile (ofd, ifd, offset, count, 0, 0);
630
631# elif __solaris
632 {
633 struct sendfilevec vec;
634 size_t sbytes;
635
636 vec.sfv_fd = ifd;
637 vec.sfv_flag = 0;
638 vec.sfv_off = offset;
639 vec.sfv_len = count;
640
641 res = sendfilev (ofd, &vec, 1, &sbytes);
642
643 if (res < 0 && sbytes)
644 res = sbytes;
645 }
646
647# endif
648#else
649 res = -1;
650 errno = ENOSYS;
651#endif
652
653 if (res < 0
654 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
655#if __solaris
656 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
657#endif
658 )
659 )
660 {
661 /* emulate sendfile. this is a major pain in the ass */
662 char buf[4096];
663 res = 0;
664
665 while (count)
666 {
667 ssize_t cnt;
668
669 cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
670
671 if (cnt <= 0)
672 {
673 if (cnt && !res) res = -1;
674 break;
675 }
676
677 cnt = write (ofd, buf, cnt);
678
679 if (cnt <= 0)
680 {
681 if (cnt && !res) res = -1;
682 break;
683 }
684
685 offset += cnt;
686 res += cnt;
687 count -= cnt;
688 }
689 }
690
691 return res;
692}
693
694/* read a full directory */
695static int scandir_ (const char *path, void **namesp)
696{
697 DIR *dirp = opendir (path);
698 union
699 {
700 struct dirent d;
701 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
702 } u;
703 struct dirent *entp;
704 char *name, *names;
705 int memlen = 4096;
706 int memofs = 0;
707 int res = 0;
708 int errorno;
709
710 if (!dirp)
711 return -1;
712
713 names = malloc (memlen);
714
715 for (;;)
716 {
717 errno = 0, readdir_r (dirp, &u.d, &entp);
718
719 if (!entp)
720 break;
721
722 name = entp->d_name;
723
724 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
725 {
726 int len = strlen (name) + 1;
727
728 res++;
729
730 while (memofs + len > memlen)
731 {
732 memlen *= 2;
733 names = realloc (names, memlen);
734 if (!names)
735 break;
736 }
737
738 memcpy (names + memofs, name, len);
739 memofs += len;
740 }
741 }
742
743 errorno = errno;
744 closedir (dirp);
745
746 if (errorno)
747 {
748 free (names);
749 errno = errorno;
750 res = -1;
751 }
752
753 *namesp = (void *)names;
754 return res;
755}
756
390/*****************************************************************************/ 757/*****************************************************************************/
391 758
392static void *
393aio_proc (void *thr_arg) 759static void *aio_proc (void *thr_arg)
394{ 760{
395 aio_req req; 761 aio_req req;
396 int type; 762 int type;
397 763
398 do 764 do
… …
417 783
418 pthread_mutex_unlock (&reqlock); 784 pthread_mutex_unlock (&reqlock);
419 785
420 errno = 0; /* strictly unnecessary */ 786 errno = 0; /* strictly unnecessary */
421 787
422 type = req->type; 788 if (!req->cancelled)
423 789 switch (type = req->type) /* remember type for QUIT check */
424 switch (type)
425 { 790 {
426 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 791 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
427 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 792 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
428 793
429 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 794 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
795 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
430 796
431 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 797 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
432 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 798 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
433 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 799 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
434 800
435 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 801 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
436 case REQ_CLOSE: req->result = close (req->fd); break; 802 case REQ_CLOSE: req->result = close (req->fd); break;
437 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 803 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
438 case REQ_RMDIR: req->result = rmdir (req->dataptr); break; 804 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
805 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
806 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
439 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 807 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
440 808
441 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 809 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
442 case REQ_FSYNC: req->result = fsync (req->fd); break; 810 case REQ_FSYNC: req->result = fsync (req->fd); break;
811 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
443 812
813 case REQ_SLEEP:
814 {
815 struct timeval tv;
816
817 tv.tv_sec = req->fd;
818 tv.tv_usec = req->fd2;
819
820 req->result = select (0, 0, 0, 0, &tv);
821 }
822
444 case REQ_QUIT: 823 case REQ_QUIT:
445 break; 824 break;
446 825
447 default: 826 default:
448 req->result = ENOSYS; 827 req->result = ENOSYS;
449 break; 828 break;
450 } 829 }
451 830
452 req->errorno = errno; 831 req->errorno = errno;
453 832
454 pthread_mutex_lock (&reslock); 833 pthread_mutex_lock (&reslock);
455 834
… …
473 while (type != REQ_QUIT); 852 while (type != REQ_QUIT);
474 853
475 return 0; 854 return 0;
476} 855}
477 856
857/*****************************************************************************/
858
859static void atfork_prepare (void)
860{
861 pthread_mutex_lock (&reqlock);
862 pthread_mutex_lock (&reslock);
863#if !HAVE_PREADWRITE
864 pthread_mutex_lock (&preadwritelock);
865#endif
866#if !HAVE_READDIR_R
867 pthread_mutex_lock (&readdirlock);
868#endif
869}
870
871static void atfork_parent (void)
872{
873#if !HAVE_READDIR_R
874 pthread_mutex_unlock (&readdirlock);
875#endif
876#if !HAVE_PREADWRITE
877 pthread_mutex_unlock (&preadwritelock);
878#endif
879 pthread_mutex_unlock (&reslock);
880 pthread_mutex_unlock (&reqlock);
881}
882
883static void atfork_child (void)
884{
885 aio_req prv;
886
887 started = 0;
888
889 while (reqs)
890 {
891 prv = reqs;
892 reqs = prv->next;
893 req_free (prv);
894 }
895
896 reqs = reqe = 0;
897
898 while (ress)
899 {
900 prv = ress;
901 ress = prv->next;
902 req_free (prv);
903 }
904
905 ress = rese = 0;
906
907 close (respipe [0]);
908 close (respipe [1]);
909 create_pipe ();
910
911 atfork_parent ();
912}
913
478#define dREQ \ 914#define dREQ \
479 aio_req req; \ 915 aio_req req; \
480 \ 916 \
481 if (SvOK (callback) && !SvROK (callback)) \ 917 if (SvOK (callback) && !SvROK (callback)) \
482 croak ("clalback must be undef or of reference type"); \ 918 croak ("callback must be undef or of reference type"); \
483 \ 919 \
484 Newz (0, req, 1, aio_cb); \ 920 Newz (0, req, 1, aio_cb); \
485 if (!req) \ 921 if (!req) \
486 croak ("out of memory during aio_req allocation"); \ 922 croak ("out of memory during aio_req allocation"); \
487 \ 923 \
488 req->callback = SvREFCNT_inc (callback); 924 req->callback = newSVsv (callback)
925
926#define REQ_SEND \
927 req_send (req); \
928 \
929 if (GIMME_V != G_VOID) \
930 XPUSHs (req_sv (req, AIO_REQ_KLASS));
489 931
490MODULE = IO::AIO PACKAGE = IO::AIO 932MODULE = IO::AIO PACKAGE = IO::AIO
491 933
492PROTOTYPES: ENABLE 934PROTOTYPES: ENABLE
493 935
494BOOT: 936BOOT:
495{ 937{
496 if (pipe (respipe)) 938 HV *stash = gv_stashpv ("IO::AIO", 1);
497 croak ("unable to initialize result pipe"); 939 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
940 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
941 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
498 942
499 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 943 create_pipe ();
500 croak ("cannot set result pipe to nonblocking mode");
501
502 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
503 croak ("cannot set result pipe to nonblocking mode");
504
505 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 944 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
506} 945}
507 946
508void 947void
509min_parallel(nthreads) 948min_parallel (nthreads)
510 int nthreads 949 int nthreads
511 PROTOTYPE: $ 950 PROTOTYPE: $
512 951
513void 952void
514max_parallel(nthreads) 953max_parallel (nthreads)
515 int nthreads 954 int nthreads
516 PROTOTYPE: $ 955 PROTOTYPE: $
517 956
518int 957int
519max_outstanding(nreqs) 958max_outstanding (nreqs)
520 int nreqs 959 int nreqs
521 PROTOTYPE: $ 960 PROTOTYPE: $
522 CODE: 961 CODE:
523 RETVAL = max_outstanding; 962 RETVAL = max_outstanding;
524 max_outstanding = nreqs; 963 max_outstanding = nreqs;
525 964
526void 965void
527aio_open(pathname,flags,mode,callback=&PL_sv_undef) 966aio_open (pathname,flags,mode,callback=&PL_sv_undef)
528 SV * pathname 967 SV * pathname
529 int flags 968 int flags
530 int mode 969 int mode
531 SV * callback 970 SV * callback
532 PROTOTYPE: $$$;$ 971 PROTOTYPE: $$$;$
533 CODE: 972 PPCODE:
534{ 973{
535 dREQ; 974 dREQ;
536 975
537 req->type = REQ_OPEN; 976 req->type = REQ_OPEN;
538 req->data = newSVsv (pathname); 977 req->data = newSVsv (pathname);
539 req->dataptr = SvPVbyte_nolen (req->data); 978 req->dataptr = SvPVbyte_nolen (req->data);
540 req->fd = flags; 979 req->fd = flags;
541 req->mode = mode; 980 req->mode = mode;
542 981
543 send_req (req); 982 REQ_SEND;
544} 983}
545 984
546void 985void
547aio_close(fh,callback=&PL_sv_undef) 986aio_close (fh,callback=&PL_sv_undef)
548 SV * fh 987 SV * fh
549 SV * callback 988 SV * callback
550 PROTOTYPE: $;$ 989 PROTOTYPE: $;$
551 ALIAS: 990 ALIAS:
552 aio_close = REQ_CLOSE 991 aio_close = REQ_CLOSE
553 aio_fsync = REQ_FSYNC 992 aio_fsync = REQ_FSYNC
554 aio_fdatasync = REQ_FDATASYNC 993 aio_fdatasync = REQ_FDATASYNC
555 CODE: 994 PPCODE:
556{ 995{
557 dREQ; 996 dREQ;
558 997
559 req->type = ix; 998 req->type = ix;
560 req->fh = newSVsv (fh); 999 req->fh = newSVsv (fh);
561 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1000 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
562 1001
563 send_req (req); 1002 REQ_SEND (req);
564} 1003}
565 1004
566void 1005void
567aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1006aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
568 SV * fh 1007 SV * fh
569 UV offset 1008 UV offset
570 IV length 1009 UV length
571 SV * data 1010 SV * data
572 IV dataoffset 1011 UV dataoffset
573 SV * callback 1012 SV * callback
574 ALIAS: 1013 ALIAS:
575 aio_read = REQ_READ 1014 aio_read = REQ_READ
576 aio_write = REQ_WRITE 1015 aio_write = REQ_WRITE
577 PROTOTYPE: $$$$$;$ 1016 PROTOTYPE: $$$$$;$
578 CODE: 1017 PPCODE:
579{ 1018{
580 aio_req req; 1019 aio_req req;
581 STRLEN svlen; 1020 STRLEN svlen;
582 char *svptr = SvPVbyte (data, svlen); 1021 char *svptr = SvPVbyte (data, svlen);
583 1022
… …
614 : IoOFP (sv_2io (fh))); 1053 : IoOFP (sv_2io (fh)));
615 req->offset = offset; 1054 req->offset = offset;
616 req->length = length; 1055 req->length = length;
617 req->data = SvREFCNT_inc (data); 1056 req->data = SvREFCNT_inc (data);
618 req->dataptr = (char *)svptr + dataoffset; 1057 req->dataptr = (char *)svptr + dataoffset;
619 req->callback = SvREFCNT_inc (callback);
620 1058
621 send_req (req); 1059 if (!SvREADONLY (data))
1060 {
1061 SvREADONLY_on (data);
1062 req->data2ptr = (void *)data;
1063 }
1064
1065 REQ_SEND;
622 } 1066 }
623} 1067}
624 1068
625void 1069void
1070aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1071 SV * out_fh
1072 SV * in_fh
1073 UV in_offset
1074 UV length
1075 SV * callback
1076 PROTOTYPE: $$$$;$
1077 PPCODE:
1078{
1079 dREQ;
1080
1081 req->type = REQ_SENDFILE;
1082 req->fh = newSVsv (out_fh);
1083 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1084 req->fh2 = newSVsv (in_fh);
1085 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1086 req->offset = in_offset;
1087 req->length = length;
1088
1089 REQ_SEND;
1090}
1091
1092void
626aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1093aio_readahead (fh,offset,length,callback=&PL_sv_undef)
627 SV * fh 1094 SV * fh
628 UV offset 1095 UV offset
629 IV length 1096 IV length
630 SV * callback 1097 SV * callback
631 PROTOTYPE: $$$;$ 1098 PROTOTYPE: $$$;$
632 CODE: 1099 PPCODE:
633{ 1100{
634 dREQ; 1101 dREQ;
635 1102
636 req->type = REQ_READAHEAD; 1103 req->type = REQ_READAHEAD;
637 req->fh = newSVsv (fh); 1104 req->fh = newSVsv (fh);
638 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1105 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
639 req->offset = offset; 1106 req->offset = offset;
640 req->length = length; 1107 req->length = length;
641 1108
642 send_req (req); 1109 REQ_SEND;
643} 1110}
644 1111
645void 1112void
646aio_stat(fh_or_path,callback=&PL_sv_undef) 1113aio_stat (fh_or_path,callback=&PL_sv_undef)
647 SV * fh_or_path 1114 SV * fh_or_path
648 SV * callback 1115 SV * callback
649 ALIAS: 1116 ALIAS:
650 aio_stat = REQ_STAT 1117 aio_stat = REQ_STAT
651 aio_lstat = REQ_LSTAT 1118 aio_lstat = REQ_LSTAT
652 CODE: 1119 PPCODE:
653{ 1120{
654 dREQ; 1121 dREQ;
655 1122
656 New (0, req->statdata, 1, Stat_t); 1123 New (0, req->statdata, 1, Stat_t);
657 if (!req->statdata) 1124 if (!req->statdata)
1125 {
1126 req_free (req);
658 croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)"); 1127 croak ("out of memory during aio_req->statdata allocation");
1128 }
659 1129
660 if (SvPOK (fh_or_path)) 1130 if (SvPOK (fh_or_path))
661 { 1131 {
662 req->type = ix; 1132 req->type = ix;
663 req->data = newSVsv (fh_or_path); 1133 req->data = newSVsv (fh_or_path);
… …
668 req->type = REQ_FSTAT; 1138 req->type = REQ_FSTAT;
669 req->fh = newSVsv (fh_or_path); 1139 req->fh = newSVsv (fh_or_path);
670 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1140 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
671 } 1141 }
672 1142
673 send_req (req); 1143 REQ_SEND;
674} 1144}
675 1145
676void 1146void
677aio_unlink(pathname,callback=&PL_sv_undef) 1147aio_unlink (pathname,callback=&PL_sv_undef)
678 SV * pathname 1148 SV * pathname
679 SV * callback 1149 SV * callback
680 ALIAS: 1150 ALIAS:
681 aio_unlink = REQ_UNLINK 1151 aio_unlink = REQ_UNLINK
682 aio_rmdir = REQ_RMDIR 1152 aio_rmdir = REQ_RMDIR
1153 aio_readdir = REQ_READDIR
683 CODE: 1154 PPCODE:
684{ 1155{
685 dREQ; 1156 dREQ;
686 1157
687 req->type = ix; 1158 req->type = ix;
688 req->data = newSVsv (pathname); 1159 req->data = newSVsv (pathname);
689 req->dataptr = SvPVbyte_nolen (req->data); 1160 req->dataptr = SvPVbyte_nolen (req->data);
690 1161
691 send_req (req); 1162 REQ_SEND;
692} 1163}
693 1164
694void 1165void
695aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1166aio_link (oldpath,newpath,callback=&PL_sv_undef)
696 SV * oldpath 1167 SV * oldpath
697 SV * newpath 1168 SV * newpath
698 SV * callback 1169 SV * callback
1170 ALIAS:
1171 aio_link = REQ_LINK
1172 aio_symlink = REQ_SYMLINK
1173 aio_rename = REQ_RENAME
699 CODE: 1174 PPCODE:
700{ 1175{
701 dREQ; 1176 dREQ;
702 1177
703 req->type = REQ_SYMLINK; 1178 req->type = ix;
704 req->fh = newSVsv (oldpath); 1179 req->fh = newSVsv (oldpath);
705 req->data2ptr = SvPVbyte_nolen (req->fh); 1180 req->data2ptr = SvPVbyte_nolen (req->fh);
706 req->data = newSVsv (newpath); 1181 req->data = newSVsv (newpath);
707 req->dataptr = SvPVbyte_nolen (req->data); 1182 req->dataptr = SvPVbyte_nolen (req->data);
708 1183
709 send_req (req); 1184 REQ_SEND;
710} 1185}
711 1186
712void 1187void
1188aio_sleep (delay,callback=&PL_sv_undef)
1189 double delay
1190 SV * callback
1191 PPCODE:
1192{
1193 dREQ;
1194
1195 req->type = REQ_SLEEP;
1196 req->fd = delay < 0. ? 0 : delay;
1197 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1198
1199 REQ_SEND;
1200}
1201
1202void
1203aio_group (callback=&PL_sv_undef)
1204 SV * callback
1205 PROTOTYPE: ;$
1206 PPCODE:
1207{
1208 dREQ;
1209 req->type = REQ_GROUP;
1210 req_send (req);
1211 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1212}
1213
1214void
713flush() 1215flush ()
714 PROTOTYPE: 1216 PROTOTYPE:
715 CODE: 1217 CODE:
716 while (nreqs) 1218 while (nreqs)
717 { 1219 {
718 poll_wait (); 1220 poll_wait ();
… …
758 CODE: 1260 CODE:
759 RETVAL = nreqs; 1261 RETVAL = nreqs;
760 OUTPUT: 1262 OUTPUT:
761 RETVAL 1263 RETVAL
762 1264
1265PROTOTYPES: DISABLE
1266
1267MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1268
1269void
1270cancel (aio_req_ornot req)
1271 PROTOTYPE:
1272 CODE:
1273 req_cancel (req);
1274
1275MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1276
1277void
1278add (aio_req grp, ...)
1279 PPCODE:
1280{
1281 int i;
1282
1283 if (grp->fd == 2)
1284 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1285
1286 for (i = 1; i < items; ++i )
1287 {
1288 if (GIMME_V != G_VOID)
1289 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1290
1291 aio_req req = SvAIO_REQ (ST (i));
1292
1293 if (req)
1294 {
1295 ++grp->length;
1296 req->grp = grp;
1297
1298 req->grp_prev = 0;
1299 req->grp_next = grp->grp_first;
1300
1301 if (grp->grp_first)
1302 grp->grp_first->grp_prev = req;
1303
1304 grp->grp_first = req;
1305 }
1306 }
1307}
1308
1309void
1310lock (aio_req grp)
1311 CODE:
1312 ++grp->length;
1313
1314void
1315unlock (aio_req grp)
1316 CODE:
1317 aio_grp_dec (grp);
1318
1319void
1320feeder_limit (aio_req grp, int limit)
1321 CODE:
1322 grp->fd2 = limit;
1323 aio_grp_feed (grp);
1324
1325void
1326set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
1327 CODE:
1328{
1329 SvREFCNT_dec (grp->fh2);
1330 grp->fh2 = newSVsv (callback);
1331
1332 if (grp->fd2 <= 0)
1333 grp->fd2 = 2;
1334
1335 aio_grp_feed (grp);
1336}
1337

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