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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 1.50 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
106static void req_invoke (aio_req req);
73static void free_req (aio_req req) 107static void req_free (aio_req req);
74{
75 if (req->data)
76 SvREFCNT_dec (req->data);
77 108
109/* must be called at most once */
110static SV *req_sv (aio_req req, const char *klass)
111{
78 if (req->fh) 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 {
79 SvREFCNT_dec (req->fh); 155 SvREFCNT_dec (grp->fh2);
80 156 grp->fh2 = 0;
81 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) 157 break;
82 Safefree (req->statdata); 158 }
83 159 }
84 if (req->callback)
85 SvREFCNT_dec (req->callback);
86
87 Safefree (req);
88} 160}
89 161
90static void 162static void aio_grp_dec (aio_req grp)
91poll_wait () 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 ()
92{ 178{
93 if (nreqs && !ress) 179 if (nreqs && !ress)
94 { 180 {
95 fd_set rfd; 181 fd_set rfd;
96 FD_ZERO(&rfd); 182 FD_ZERO(&rfd);
… …
98 184
99 select (respipe [0] + 1, &rfd, 0, 0, 0); 185 select (respipe [0] + 1, &rfd, 0, 0, 0);
100 } 186 }
101} 187}
102 188
103static int 189static void req_invoke (aio_req req)
104poll_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 ()
105{ 335{
106 dSP; 336 dSP;
107 int count = 0; 337 int count = 0;
108 int do_croak = 0; 338 int do_croak = 0;
109 aio_req req, prv; 339 aio_req req;
110 340
341 for (;;)
342 {
111 pthread_mutex_lock (&reslock); 343 pthread_mutex_lock (&reslock);
344 req = ress;
112 345
113 { 346 if (req)
347 {
348 ress = req->next;
349
350 if (!ress)
351 {
114 /* read any signals sent by the worker threads */ 352 /* read any signals sent by the worker threads */
115 char buf [32]; 353 char buf [32];
116 while (read (respipe [0], buf, 32) == 32) 354 while (read (respipe [0], buf, 32) == 32)
355 ;
356
357 rese = 0;
358 }
117 ; 359 }
118 }
119 360
120 req = ress;
121 ress = rese = 0;
122
123 pthread_mutex_unlock (&reslock); 361 pthread_mutex_unlock (&reslock);
124 362
125 while (req) 363 if (!req)
126 { 364 break;
365
127 nreqs--; 366 --nreqs;
128 367
129 if (req->type == REQ_QUIT) 368 if (req->type == REQ_QUIT)
130 started--; 369 started--;
370 else if (req->type == REQ_GROUP && req->length)
371 {
372 req->fd = 1; /* mark request as delayed */
373 continue;
374 }
131 else 375 else
132 { 376 {
133 int errorno = errno;
134 errno = req->errorno;
135
136 if (req->type == REQ_READ) 377 if (req->type == REQ_READ)
137 SvCUR_set (req->data, req->dataoffset 378 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
138 + req->result > 0 ? req->result : 0);
139 379
140 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT) 380 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
381 SvREADONLY_off (req->data);
382
383 if (req->statdata)
141 { 384 {
142 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 385 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
143 PL_laststatval = req->result; 386 PL_laststatval = req->result;
144 PL_statcache = *(req->statdata); 387 PL_statcache = *(req->statdata);
145 } 388 }
146 389
147 ENTER; 390 req_invoke (req);
148 PUSHMARK (SP);
149 XPUSHs (sv_2mortal (newSViv (req->result)));
150 391
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++; 392 count++;
179 } 393 }
180 394
181 prv = req; 395 req_free (req);
182 req = req->next;
183 free_req (prv);
184
185 if (do_croak)
186 croak (0);
187 } 396 }
188 397
189 return count; 398 return count;
190} 399}
191 400
192static void *aio_proc(void *arg); 401static void *aio_proc(void *arg);
193 402
194static void
195start_thread (void) 403static void start_thread (void)
196{ 404{
197 sigset_t fullsigset, oldsigset; 405 sigset_t fullsigset, oldsigset;
198 pthread_t tid; 406 pthread_t tid;
199 pthread_attr_t attr; 407 pthread_attr_t attr;
200 408
… …
209 started++; 417 started++;
210 418
211 sigprocmask (SIG_SETMASK, &oldsigset, 0); 419 sigprocmask (SIG_SETMASK, &oldsigset, 0);
212} 420}
213 421
214static void 422static void req_send (aio_req req)
215send_req (aio_req req)
216{ 423{
424 while (started < wanted && nreqs >= started)
425 start_thread ();
426
217 nreqs++; 427 ++nreqs;
218 428
219 pthread_mutex_lock (&reqlock); 429 pthread_mutex_lock (&reqlock);
220 430
221 req->next = 0; 431 req->next = 0;
222 432
… …
229 reqe = reqs = req; 439 reqe = reqs = req;
230 440
231 pthread_cond_signal (&reqwait); 441 pthread_cond_signal (&reqwait);
232 pthread_mutex_unlock (&reqlock); 442 pthread_mutex_unlock (&reqlock);
233 443
234 while (nreqs > max_outstanding) 444 if (nreqs > max_outstanding)
445 for (;;)
235 { 446 {
447 poll_cb ();
448
449 if (nreqs <= max_outstanding)
450 break;
451
236 poll_wait (); 452 poll_wait ();
237 poll_cb ();
238 } 453 }
239} 454}
240 455
241static void 456static void end_thread (void)
242end_thread (void)
243{ 457{
244 aio_req req; 458 aio_req req;
245 Newz (0, req, 1, aio_cb); 459 Newz (0, req, 1, aio_cb);
246 req->type = REQ_QUIT; 460 req->type = REQ_QUIT;
247 461
248 send_req (req); 462 req_send (req);
249} 463}
250
251 464
252static void min_parallel (int nthreads) 465static void min_parallel (int nthreads)
253{ 466{
254 while (nthreads > started) 467 if (wanted < nthreads)
255 start_thread (); 468 wanted = nthreads;
256} 469}
257 470
258static void max_parallel (int nthreads) 471static void max_parallel (int nthreads)
259{ 472{
260 int cur = started; 473 int cur = started;
474
475 if (wanted > nthreads)
476 wanted = nthreads;
477
261 while (cur > nthreads) 478 while (cur > wanted)
262 { 479 {
263 end_thread (); 480 end_thread ();
264 cur--; 481 cur--;
265 } 482 }
266 483
267 while (started > nthreads) 484 while (started > wanted)
268 { 485 {
269 poll_wait (); 486 poll_wait ();
270 poll_cb (); 487 poll_cb ();
271 } 488 }
272} 489}
… …
279 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 496 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
280 croak ("cannot set result pipe to nonblocking mode"); 497 croak ("cannot set result pipe to nonblocking mode");
281 498
282 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 499 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
283 croak ("cannot set result pipe to nonblocking mode"); 500 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} 501}
330 502
331/*****************************************************************************/ 503/*****************************************************************************/
332/* work around various missing functions */ 504/* work around various missing functions */
333 505
… …
338/* 510/*
339 * make our pread/pwrite safe against themselves, but not against 511 * make our pread/pwrite safe against themselves, but not against
340 * 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,
341 * but that's your problem, not mine. 513 * but that's your problem, not mine.
342 */ 514 */
343static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 515static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
344 516
345static ssize_t 517static 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{ 518{
348 ssize_t res; 519 ssize_t res;
349 off_t ooffset; 520 off_t ooffset;
350 521
351 pthread_mutex_lock (&iolock); 522 pthread_mutex_lock (&preadwritelock);
352 ooffset = lseek (fd, 0, SEEK_CUR); 523 ooffset = lseek (fd, 0, SEEK_CUR);
353 lseek (fd, offset, SEEK_SET); 524 lseek (fd, offset, SEEK_SET);
354 res = read (fd, buf, count); 525 res = read (fd, buf, count);
355 lseek (fd, ooffset, SEEK_SET); 526 lseek (fd, ooffset, SEEK_SET);
356 pthread_mutex_unlock (&iolock); 527 pthread_mutex_unlock (&preadwritelock);
357 528
358 return res; 529 return res;
359} 530}
360 531
361static ssize_t
362pwrite (int fd, void *buf, size_t count, off_t offset) 532static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
363{ 533{
364 ssize_t res; 534 ssize_t res;
365 off_t ooffset; 535 off_t ooffset;
366 536
367 pthread_mutex_lock (&iolock); 537 pthread_mutex_lock (&preadwritelock);
368 ooffset = lseek (fd, 0, SEEK_CUR); 538 ooffset = lseek (fd, 0, SEEK_CUR);
369 lseek (fd, offset, SEEK_SET); 539 lseek (fd, offset, SEEK_SET);
370 res = write (fd, buf, count); 540 res = write (fd, buf, count);
371 lseek (fd, offset, SEEK_SET); 541 lseek (fd, offset, SEEK_SET);
372 pthread_mutex_unlock (&iolock); 542 pthread_mutex_unlock (&preadwritelock);
373 543
374 return res; 544 return res;
375} 545}
376#endif 546#endif
377 547
… …
380#endif 550#endif
381 551
382#if !HAVE_READAHEAD 552#if !HAVE_READAHEAD
383# define readahead aio_readahead 553# define readahead aio_readahead
384 554
555static ssize_t readahead (int fd, off_t offset, size_t count)
556{
385static char readahead_buf[4096]; 557 char readahead_buf[4096];
386 558
387static ssize_t
388readahead (int fd, off_t offset, size_t count)
389{
390 while (count > 0) 559 while (count > 0)
391 { 560 {
392 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 561 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
393 562
394 pread (fd, readahead_buf, len, offset); 563 pread (fd, readahead_buf, len, offset);
… …
398 567
399 errno = 0; 568 errno = 0;
400} 569}
401#endif 570#endif
402 571
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
403/*****************************************************************************/ 757/*****************************************************************************/
404 758
405static void *
406aio_proc (void *thr_arg) 759static void *aio_proc (void *thr_arg)
407{ 760{
408 aio_req req; 761 aio_req req;
409 int type; 762 int type;
410 763
411 do 764 do
… …
430 783
431 pthread_mutex_unlock (&reqlock); 784 pthread_mutex_unlock (&reqlock);
432 785
433 errno = 0; /* strictly unnecessary */ 786 errno = 0; /* strictly unnecessary */
434 787
435 type = req->type; 788 if (!req->cancelled)
436 789 switch (type = req->type) /* remember type for QUIT check */
437 switch (type)
438 { 790 {
439 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;
440 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;
441 793
442 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;
443 796
444 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 797 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
445 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 798 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
446 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 799 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
447 800
448 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;
449 case REQ_CLOSE: req->result = close (req->fd); break; 802 case REQ_CLOSE: req->result = close (req->fd); break;
450 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 803 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
451 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;
452 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 807 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
453 808
454 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 809 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
455 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;
456 812
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
457 case REQ_QUIT: 823 case REQ_QUIT:
458 break; 824 break;
459 825
460 default: 826 default:
461 req->result = ENOSYS; 827 req->result = ENOSYS;
462 break; 828 break;
463 } 829 }
464 830
465 req->errorno = errno; 831 req->errorno = errno;
466 832
467 pthread_mutex_lock (&reslock); 833 pthread_mutex_lock (&reslock);
468 834
… …
486 while (type != REQ_QUIT); 852 while (type != REQ_QUIT);
487 853
488 return 0; 854 return 0;
489} 855}
490 856
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
491#define dREQ \ 914#define dREQ \
492 aio_req req; \ 915 aio_req req; \
493 \ 916 \
494 if (SvOK (callback) && !SvROK (callback)) \ 917 if (SvOK (callback) && !SvROK (callback)) \
495 croak ("clalback must be undef or of reference type"); \ 918 croak ("callback must be undef or of reference type"); \
496 \ 919 \
497 Newz (0, req, 1, aio_cb); \ 920 Newz (0, req, 1, aio_cb); \
498 if (!req) \ 921 if (!req) \
499 croak ("out of memory during aio_req allocation"); \ 922 croak ("out of memory during aio_req allocation"); \
500 \ 923 \
501 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));
502 931
503MODULE = IO::AIO PACKAGE = IO::AIO 932MODULE = IO::AIO PACKAGE = IO::AIO
504 933
505PROTOTYPES: ENABLE 934PROTOTYPES: ENABLE
506 935
507BOOT: 936BOOT:
508{ 937{
938 HV *stash = gv_stashpv ("IO::AIO", 1);
939 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
940 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
941 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
942
509 create_pipe (); 943 create_pipe ();
510 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 944 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
511} 945}
512 946
513void 947void
514min_parallel(nthreads) 948min_parallel (nthreads)
515 int nthreads 949 int nthreads
516 PROTOTYPE: $ 950 PROTOTYPE: $
517 951
518void 952void
519max_parallel(nthreads) 953max_parallel (nthreads)
520 int nthreads 954 int nthreads
521 PROTOTYPE: $ 955 PROTOTYPE: $
522 956
523int 957int
524max_outstanding(nreqs) 958max_outstanding (nreqs)
525 int nreqs 959 int nreqs
526 PROTOTYPE: $ 960 PROTOTYPE: $
527 CODE: 961 CODE:
528 RETVAL = max_outstanding; 962 RETVAL = max_outstanding;
529 max_outstanding = nreqs; 963 max_outstanding = nreqs;
530 964
531void 965void
532aio_open(pathname,flags,mode,callback=&PL_sv_undef) 966aio_open (pathname,flags,mode,callback=&PL_sv_undef)
533 SV * pathname 967 SV * pathname
534 int flags 968 int flags
535 int mode 969 int mode
536 SV * callback 970 SV * callback
537 PROTOTYPE: $$$;$ 971 PROTOTYPE: $$$;$
538 CODE: 972 PPCODE:
539{ 973{
540 dREQ; 974 dREQ;
541 975
542 req->type = REQ_OPEN; 976 req->type = REQ_OPEN;
543 req->data = newSVsv (pathname); 977 req->data = newSVsv (pathname);
544 req->dataptr = SvPVbyte_nolen (req->data); 978 req->dataptr = SvPVbyte_nolen (req->data);
545 req->fd = flags; 979 req->fd = flags;
546 req->mode = mode; 980 req->mode = mode;
547 981
548 send_req (req); 982 REQ_SEND;
549} 983}
550 984
551void 985void
552aio_close(fh,callback=&PL_sv_undef) 986aio_close (fh,callback=&PL_sv_undef)
553 SV * fh 987 SV * fh
554 SV * callback 988 SV * callback
555 PROTOTYPE: $;$ 989 PROTOTYPE: $;$
556 ALIAS: 990 ALIAS:
557 aio_close = REQ_CLOSE 991 aio_close = REQ_CLOSE
558 aio_fsync = REQ_FSYNC 992 aio_fsync = REQ_FSYNC
559 aio_fdatasync = REQ_FDATASYNC 993 aio_fdatasync = REQ_FDATASYNC
560 CODE: 994 PPCODE:
561{ 995{
562 dREQ; 996 dREQ;
563 997
564 req->type = ix; 998 req->type = ix;
565 req->fh = newSVsv (fh); 999 req->fh = newSVsv (fh);
566 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1000 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
567 1001
568 send_req (req); 1002 REQ_SEND (req);
569} 1003}
570 1004
571void 1005void
572aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1006aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
573 SV * fh 1007 SV * fh
574 UV offset 1008 UV offset
575 IV length 1009 UV length
576 SV * data 1010 SV * data
577 IV dataoffset 1011 UV dataoffset
578 SV * callback 1012 SV * callback
579 ALIAS: 1013 ALIAS:
580 aio_read = REQ_READ 1014 aio_read = REQ_READ
581 aio_write = REQ_WRITE 1015 aio_write = REQ_WRITE
582 PROTOTYPE: $$$$$;$ 1016 PROTOTYPE: $$$$$;$
583 CODE: 1017 PPCODE:
584{ 1018{
585 aio_req req; 1019 aio_req req;
586 STRLEN svlen; 1020 STRLEN svlen;
587 char *svptr = SvPVbyte (data, svlen); 1021 char *svptr = SvPVbyte (data, svlen);
588 1022
… …
619 : IoOFP (sv_2io (fh))); 1053 : IoOFP (sv_2io (fh)));
620 req->offset = offset; 1054 req->offset = offset;
621 req->length = length; 1055 req->length = length;
622 req->data = SvREFCNT_inc (data); 1056 req->data = SvREFCNT_inc (data);
623 req->dataptr = (char *)svptr + dataoffset; 1057 req->dataptr = (char *)svptr + dataoffset;
624 req->callback = SvREFCNT_inc (callback);
625 1058
626 send_req (req); 1059 if (!SvREADONLY (data))
1060 {
1061 SvREADONLY_on (data);
1062 req->data2ptr = (void *)data;
1063 }
1064
1065 REQ_SEND;
627 } 1066 }
628} 1067}
629 1068
630void 1069void
1070aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1071 SV * out_fh
1072 SV * in_fh
1073 UV in_offset
1074 UV length
1075 SV * callback
1076 PROTOTYPE: $$$$;$
1077 PPCODE:
1078{
1079 dREQ;
1080
1081 req->type = REQ_SENDFILE;
1082 req->fh = newSVsv (out_fh);
1083 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1084 req->fh2 = newSVsv (in_fh);
1085 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1086 req->offset = in_offset;
1087 req->length = length;
1088
1089 REQ_SEND;
1090}
1091
1092void
631aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1093aio_readahead (fh,offset,length,callback=&PL_sv_undef)
632 SV * fh 1094 SV * fh
633 UV offset 1095 UV offset
634 IV length 1096 IV length
635 SV * callback 1097 SV * callback
636 PROTOTYPE: $$$;$ 1098 PROTOTYPE: $$$;$
637 CODE: 1099 PPCODE:
638{ 1100{
639 dREQ; 1101 dREQ;
640 1102
641 req->type = REQ_READAHEAD; 1103 req->type = REQ_READAHEAD;
642 req->fh = newSVsv (fh); 1104 req->fh = newSVsv (fh);
643 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1105 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
644 req->offset = offset; 1106 req->offset = offset;
645 req->length = length; 1107 req->length = length;
646 1108
647 send_req (req); 1109 REQ_SEND;
648} 1110}
649 1111
650void 1112void
651aio_stat(fh_or_path,callback=&PL_sv_undef) 1113aio_stat (fh_or_path,callback=&PL_sv_undef)
652 SV * fh_or_path 1114 SV * fh_or_path
653 SV * callback 1115 SV * callback
654 ALIAS: 1116 ALIAS:
655 aio_stat = REQ_STAT 1117 aio_stat = REQ_STAT
656 aio_lstat = REQ_LSTAT 1118 aio_lstat = REQ_LSTAT
657 CODE: 1119 PPCODE:
658{ 1120{
659 dREQ; 1121 dREQ;
660 1122
661 New (0, req->statdata, 1, Stat_t); 1123 New (0, req->statdata, 1, Stat_t);
662 if (!req->statdata) 1124 if (!req->statdata)
1125 {
1126 req_free (req);
663 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 }
664 1129
665 if (SvPOK (fh_or_path)) 1130 if (SvPOK (fh_or_path))
666 { 1131 {
667 req->type = ix; 1132 req->type = ix;
668 req->data = newSVsv (fh_or_path); 1133 req->data = newSVsv (fh_or_path);
… …
673 req->type = REQ_FSTAT; 1138 req->type = REQ_FSTAT;
674 req->fh = newSVsv (fh_or_path); 1139 req->fh = newSVsv (fh_or_path);
675 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1140 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
676 } 1141 }
677 1142
678 send_req (req); 1143 REQ_SEND;
679} 1144}
680 1145
681void 1146void
682aio_unlink(pathname,callback=&PL_sv_undef) 1147aio_unlink (pathname,callback=&PL_sv_undef)
683 SV * pathname 1148 SV * pathname
684 SV * callback 1149 SV * callback
685 ALIAS: 1150 ALIAS:
686 aio_unlink = REQ_UNLINK 1151 aio_unlink = REQ_UNLINK
687 aio_rmdir = REQ_RMDIR 1152 aio_rmdir = REQ_RMDIR
1153 aio_readdir = REQ_READDIR
688 CODE: 1154 PPCODE:
689{ 1155{
690 dREQ; 1156 dREQ;
691 1157
692 req->type = ix; 1158 req->type = ix;
693 req->data = newSVsv (pathname); 1159 req->data = newSVsv (pathname);
694 req->dataptr = SvPVbyte_nolen (req->data); 1160 req->dataptr = SvPVbyte_nolen (req->data);
695 1161
696 send_req (req); 1162 REQ_SEND;
697} 1163}
698 1164
699void 1165void
700aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1166aio_link (oldpath,newpath,callback=&PL_sv_undef)
701 SV * oldpath 1167 SV * oldpath
702 SV * newpath 1168 SV * newpath
703 SV * callback 1169 SV * callback
1170 ALIAS:
1171 aio_link = REQ_LINK
1172 aio_symlink = REQ_SYMLINK
1173 aio_rename = REQ_RENAME
704 CODE: 1174 PPCODE:
705{ 1175{
706 dREQ; 1176 dREQ;
707 1177
708 req->type = REQ_SYMLINK; 1178 req->type = ix;
709 req->fh = newSVsv (oldpath); 1179 req->fh = newSVsv (oldpath);
710 req->data2ptr = SvPVbyte_nolen (req->fh); 1180 req->data2ptr = SvPVbyte_nolen (req->fh);
711 req->data = newSVsv (newpath); 1181 req->data = newSVsv (newpath);
712 req->dataptr = SvPVbyte_nolen (req->data); 1182 req->dataptr = SvPVbyte_nolen (req->data);
713 1183
714 send_req (req); 1184 REQ_SEND;
715} 1185}
716 1186
717void 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
718flush() 1215flush ()
719 PROTOTYPE: 1216 PROTOTYPE:
720 CODE: 1217 CODE:
721 while (nreqs) 1218 while (nreqs)
722 { 1219 {
723 poll_wait (); 1220 poll_wait ();
… …
763 CODE: 1260 CODE:
764 RETVAL = nreqs; 1261 RETVAL = nreqs;
765 OUTPUT: 1262 OUTPUT:
766 RETVAL 1263 RETVAL
767 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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