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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.25 by root, Wed Aug 17 03:16:56 2005 UTC vs.
Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC

1/* solaris */
2#define _POSIX_PTHREAD_SEMANTICS 1
3
4#if __linux
5# define _GNU_SOURCE
6#endif
7
1#define _REENTRANT 1 8#define _REENTRANT 1
9
2#include <errno.h> 10#include <errno.h>
3 11
4#include "EXTERN.h" 12#include "EXTERN.h"
5#include "perl.h" 13#include "perl.h"
6#include "XSUB.h" 14#include "XSUB.h"
7 15
8#include "autoconf/config.h" 16#include "autoconf/config.h"
9 17
18#include <pthread.h>
19
20#include <stddef.h>
21#include <errno.h>
22#include <sys/time.h>
23#include <sys/select.h>
10#include <sys/types.h> 24#include <sys/types.h>
11#include <sys/stat.h> 25#include <sys/stat.h>
12 26#include <limits.h>
13#include <unistd.h> 27#include <unistd.h>
14#include <fcntl.h> 28#include <fcntl.h>
15#include <signal.h> 29#include <signal.h>
16#include <sched.h> 30#include <sched.h>
17 31
18#include <pthread.h> 32#if HAVE_SENDFILE
33# if __linux
34# include <sys/sendfile.h>
35# elif __freebsd
36# include <sys/socket.h>
37# include <sys/uio.h>
38# elif __hpux
39# include <sys/socket.h>
40# elif __solaris /* not yet */
41# include <sys/sendfile.h>
42# else
43# error sendfile support requested but not available
44# endif
45#endif
19 46
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 47/* used for struct dirent, AIX doesn't provide it */
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 48#ifndef NAME_MAX
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49# define NAME_MAX 4096
50#endif
23 51
24#if __ia64 52#if __ia64
25# define STACKSIZE 65536 53# define STACKSIZE 65536
54#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55# define STACKSIZE PTHREAD_STACK_MIN
26#else 56#else
27# define STACKSIZE 4096 57# define STACKSIZE 16384
28#endif 58#endif
59
60/* buffer size for various temporary buffers */
61#define AIO_BUFSIZE 65536
62
63#define dBUF \
64 char *aio_buf; \
65 LOCK (wrklock); \
66 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
67 UNLOCK (wrklock); \
68 if (!aio_buf) \
69 return -1;
29 70
30enum { 71enum {
31 REQ_QUIT, 72 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 73 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 74 REQ_READ, REQ_WRITE, REQ_READAHEAD,
75 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, 76 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 77 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR, 78 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37 REQ_SYMLINK, 79 REQ_READDIR,
80 REQ_LINK, REQ_SYMLINK,
81 REQ_GROUP, REQ_NOP,
82 REQ_BUSY,
38}; 83};
39 84
85#define AIO_REQ_KLASS "IO::AIO::REQ"
86#define AIO_GRP_KLASS "IO::AIO::GRP"
87
40typedef struct aio_cb { 88typedef struct aio_cb
89{
41 struct aio_cb *volatile next; 90 struct aio_cb *volatile next;
42 91
43 int type; 92 SV *data, *callback;
44 93 SV *fh, *fh2;
45 int fd; 94 void *dataptr, *data2ptr;
95 Stat_t *statdata;
46 off_t offset; 96 off_t offset;
47 size_t length; 97 size_t length;
48 ssize_t result; 98 ssize_t result;
99
100 STRLEN dataoffset;
101 int type;
102 int fd, fd2;
103 int errorno;
49 mode_t mode; /* open */ 104 mode_t mode; /* open */
50 int errorno;
51 SV *data, *callback, *fh;
52 void *dataptr, *data2ptr;
53 STRLEN dataoffset;
54 105
55 Stat_t *statdata; 106 unsigned char flags;
107 unsigned char pri;
108
109 SV *self; /* the perl counterpart of this request, if any */
110 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
56} aio_cb; 111} aio_cb;
57 112
113enum {
114 FLAG_CANCELLED = 0x01,
115};
116
58typedef aio_cb *aio_req; 117typedef aio_cb *aio_req;
118typedef aio_cb *aio_req_ornot;
59 119
120enum {
121 PRI_MIN = -4,
122 PRI_MAX = 4,
123
124 DEFAULT_PRI = 0,
125 PRI_BIAS = -PRI_MIN,
126 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127};
128
129static int next_pri = DEFAULT_PRI + PRI_BIAS;
130
60static int started; 131static int started, wanted;
61static volatile int nreqs; 132static volatile int nreqs;
62static int max_outstanding = 1<<30; 133static int max_outstanding = 1<<30;
63static int respipe [2]; 134static int respipe [2];
64 135
136#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
137# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
138#else
139# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
140#endif
141
142#define LOCK(mutex) pthread_mutex_lock (&(mutex))
143#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
144
145/* worker threasd management */
146static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
147
148typedef struct worker {
149 /* locked by wrklock */
150 struct worker *prev, *next;
151
152 pthread_t tid;
153
154 /* locked by reslock, reqlock or wrklock */
155 aio_req req; /* currently processed request */
156 void *dbuf;
157 DIR *dirp;
158} worker;
159
160static worker wrk_first = { &wrk_first, &wrk_first, 0 };
161
162static void worker_clear (worker *wrk)
163{
164 if (wrk->dirp)
165 {
166 closedir (wrk->dirp);
167 wrk->dirp = 0;
168 }
169
170 if (wrk->dbuf)
171 {
172 free (wrk->dbuf);
173 wrk->dbuf = 0;
174 }
175}
176
177static void worker_free (worker *wrk)
178{
179 wrk->next->prev = wrk->prev;
180 wrk->prev->next = wrk->next;
181
182 free (wrk);
183}
184
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 185static pthread_mutex_t reslock = AIO_MUTEX_INIT;
66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 186static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
67static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 187static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69 188
70static volatile aio_req reqs, reqe; /* queue start, queue end */ 189/*
71static volatile aio_req ress, rese; /* queue start, queue end */ 190 * a somewhat faster data structure might be nice, but
191 * with 8 priorities this actually needs <20 insns
192 * per shift, the most expensive operation.
193 */
194typedef struct {
195 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
196 int size;
197} reqq;
72 198
73static void 199static reqq req_queue;
74poll_wait () 200static reqq res_queue;
201
202int reqq_push (reqq *q, aio_req req)
75{ 203{
76 if (nreqs && !ress) 204 int pri = req->pri;
205 req->next = 0;
206
207 if (q->qe[pri])
208 {
209 q->qe[pri]->next = req;
210 q->qe[pri] = req;
77 { 211 }
212 else
213 q->qe[pri] = q->qs[pri] = req;
214
215 return q->size++;
216}
217
218aio_req reqq_shift (reqq *q)
219{
220 int pri;
221
222 if (!q->size)
223 return 0;
224
225 --q->size;
226
227 for (pri = NUM_PRI; pri--; )
228 {
229 aio_req req = q->qs[pri];
230
231 if (req)
232 {
233 if (!(q->qs[pri] = req->next))
234 q->qe[pri] = 0;
235
236 return req;
237 }
238 }
239
240 abort ();
241}
242
243static void req_invoke (aio_req req);
244static void req_free (aio_req req);
245
246/* must be called at most once */
247static SV *req_sv (aio_req req, const char *klass)
248{
249 if (!req->self)
250 {
251 req->self = (SV *)newHV ();
252 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
253 }
254
255 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
256}
257
258static aio_req SvAIO_REQ (SV *sv)
259{
260 MAGIC *mg;
261
262 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
263 croak ("object of class " AIO_REQ_KLASS " expected");
264
265 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
266
267 return mg ? (aio_req)mg->mg_ptr : 0;
268}
269
270static void aio_grp_feed (aio_req grp)
271{
272 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
273 {
274 int old_len = grp->length;
275
276 if (grp->fh2 && SvOK (grp->fh2))
277 {
278 dSP;
279
280 ENTER;
281 SAVETMPS;
282 PUSHMARK (SP);
283 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
284 PUTBACK;
285 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
286 SPAGAIN;
287 FREETMPS;
288 LEAVE;
289 }
290
291 /* stop if no progress has been made */
292 if (old_len == grp->length)
293 {
294 SvREFCNT_dec (grp->fh2);
295 grp->fh2 = 0;
296 break;
297 }
298 }
299}
300
301static void aio_grp_dec (aio_req grp)
302{
303 --grp->length;
304
305 /* call feeder, if applicable */
306 aio_grp_feed (grp);
307
308 /* finish, if done */
309 if (!grp->length && grp->fd)
310 {
311 req_invoke (grp);
312 req_free (grp);
313 }
314}
315
316static void poll_wait ()
317{
78 fd_set rfd; 318 fd_set rfd;
319
320 while (nreqs)
321 {
322 int size;
323#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
324 LOCK (reslock);
325#endif
326 size = res_queue.size;
327#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
328 UNLOCK (reslock);
329#endif
330
331 if (size)
332 return;
333
79 FD_ZERO(&rfd); 334 FD_ZERO(&rfd);
80 FD_SET(respipe [0], &rfd); 335 FD_SET(respipe [0], &rfd);
81 336
82 select (respipe [0] + 1, &rfd, 0, 0, 0); 337 select (respipe [0] + 1, &rfd, 0, 0, 0);
83 } 338 }
84} 339}
85 340
86static int 341static void req_invoke (aio_req req)
87poll_cb () 342{
343 dSP;
344
345 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
346 {
347 errno = req->errorno;
348
349 ENTER;
350 SAVETMPS;
351 PUSHMARK (SP);
352 EXTEND (SP, 1);
353
354 switch (req->type)
355 {
356 case REQ_READDIR:
357 {
358 SV *rv = &PL_sv_undef;
359
360 if (req->result >= 0)
361 {
362 int i;
363 char *buf = req->data2ptr;
364 AV *av = newAV ();
365
366 av_extend (av, req->result - 1);
367
368 for (i = 0; i < req->result; ++i)
369 {
370 SV *sv = newSVpv (buf, 0);
371
372 av_store (av, i, sv);
373 buf += SvCUR (sv) + 1;
374 }
375
376 rv = sv_2mortal (newRV_noinc ((SV *)av));
377 }
378
379 PUSHs (rv);
380 }
381 break;
382
383 case REQ_OPEN:
384 {
385 /* convert fd to fh */
386 SV *fh;
387
388 PUSHs (sv_2mortal (newSViv (req->result)));
389 PUTBACK;
390 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
391 SPAGAIN;
392
393 fh = SvREFCNT_inc (POPs);
394
395 PUSHMARK (SP);
396 XPUSHs (sv_2mortal (fh));
397 }
398 break;
399
400 case REQ_GROUP:
401 req->fd = 2; /* mark group as finished */
402
403 if (req->data)
404 {
405 int i;
406 AV *av = (AV *)req->data;
407
408 EXTEND (SP, AvFILL (av) + 1);
409 for (i = 0; i <= AvFILL (av); ++i)
410 PUSHs (*av_fetch (av, i, 0));
411 }
412 break;
413
414 case REQ_NOP:
415 case REQ_BUSY:
416 break;
417
418 default:
419 PUSHs (sv_2mortal (newSViv (req->result)));
420 break;
421 }
422
423
424 PUTBACK;
425 call_sv (req->callback, G_VOID | G_EVAL);
426 SPAGAIN;
427
428 FREETMPS;
429 LEAVE;
430 }
431
432 if (req->grp)
433 {
434 aio_req grp = req->grp;
435
436 /* unlink request */
437 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
438 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
439
440 if (grp->grp_first == req)
441 grp->grp_first = req->grp_next;
442
443 aio_grp_dec (grp);
444 }
445
446 if (SvTRUE (ERRSV))
447 {
448 req_free (req);
449 croak (0);
450 }
451}
452
453static void req_free (aio_req req)
454{
455 if (req->self)
456 {
457 sv_unmagic (req->self, PERL_MAGIC_ext);
458 SvREFCNT_dec (req->self);
459 }
460
461 SvREFCNT_dec (req->data);
462 SvREFCNT_dec (req->fh);
463 SvREFCNT_dec (req->fh2);
464 SvREFCNT_dec (req->callback);
465 Safefree (req->statdata);
466
467 if (req->type == REQ_READDIR)
468 free (req->data2ptr);
469
470 Safefree (req);
471}
472
473static void req_cancel (aio_req req)
474{
475 req->flags |= FLAG_CANCELLED;
476
477 if (req->type == REQ_GROUP)
478 {
479 aio_req sub;
480
481 for (sub = req->grp_first; sub; sub = sub->grp_next)
482 req_cancel (sub);
483 }
484}
485
486static int poll_cb ()
88{ 487{
89 dSP; 488 dSP;
90 int count = 0; 489 int count = 0;
91 int do_croak = 0; 490 int do_croak = 0;
92 aio_req req, prv; 491 aio_req req;
93 492
94 pthread_mutex_lock (&reslock); 493 for (;;)
95
96 { 494 {
495 LOCK (reslock);
496 req = reqq_shift (&res_queue);
497
498 if (req)
499 {
500 if (!res_queue.size)
501 {
97 /* read any signals sent by the worker threads */ 502 /* read any signals sent by the worker threads */
98 char buf [32]; 503 char buf [32];
99 while (read (respipe [0], buf, 32) == 32) 504 while (read (respipe [0], buf, 32) == 32)
505 ;
506 }
100 ; 507 }
101 }
102 508
103 req = ress; 509 UNLOCK (reslock);
104 ress = rese = 0;
105 510
106 pthread_mutex_unlock (&reslock); 511 if (!req)
512 break;
107 513
108 while (req)
109 {
110 nreqs--; 514 --nreqs;
111 515
112 if (req->type == REQ_QUIT) 516 if (req->type == REQ_QUIT)
113 started--; 517 started--;
518 else if (req->type == REQ_GROUP && req->length)
519 {
520 req->fd = 1; /* mark request as delayed */
521 continue;
522 }
114 else 523 else
115 { 524 {
116 int errorno = errno;
117 errno = req->errorno;
118
119 if (req->type == REQ_READ) 525 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset 526 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121 + req->result > 0 ? req->result : 0);
122 527
528 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
529 SvREADONLY_off (req->data);
530
123 if (req->data) 531 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 { 532 {
131 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 533 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
132 PL_laststatval = req->result; 534 PL_laststatval = req->result;
133 PL_statcache = *(req->statdata); 535 PL_statcache = *(req->statdata);
134
135 Safefree (req->statdata);
136 } 536 }
137 537
138 ENTER; 538 req_invoke (req);
139 PUSHMARK (SP);
140 XPUSHs (sv_2mortal (newSViv (req->result)));
141 539
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++; 540 count++;
173 } 541 }
174 542
175 prv = req;
176 req = req->next;
177 Safefree (prv); 543 req_free (req);
178
179 if (do_croak)
180 croak (0);
181 } 544 }
182 545
183 return count; 546 return count;
184} 547}
185 548
186static void *aio_proc(void *arg); 549static void *aio_proc(void *arg);
187 550
188static void
189start_thread (void) 551static void start_thread (void)
190{ 552{
553 worker *wrk = calloc (1, sizeof (worker));
554
555 if (!wrk)
556 croak ("unable to allocate worker thread data");
557
191 sigset_t fullsigset, oldsigset; 558 sigset_t fullsigset, oldsigset;
192 pthread_t tid;
193 pthread_attr_t attr; 559 pthread_attr_t attr;
194 560
195 pthread_attr_init (&attr); 561 pthread_attr_init (&attr);
196 pthread_attr_setstacksize (&attr, STACKSIZE); 562 pthread_attr_setstacksize (&attr, STACKSIZE);
197 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 563 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
198 564
199 sigfillset (&fullsigset); 565 sigfillset (&fullsigset);
566
567 LOCK (wrklock);
200 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 568 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
201 569
202 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 570 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
571 {
572 wrk->prev = &wrk_first;
573 wrk->next = wrk_first.next;
574 wrk_first.next->prev = wrk;
575 wrk_first.next = wrk;
203 started++; 576 started++;
577 }
578 else
579 free (wrk);
204 580
205 sigprocmask (SIG_SETMASK, &oldsigset, 0); 581 sigprocmask (SIG_SETMASK, &oldsigset, 0);
582 UNLOCK (wrklock);
206} 583}
207 584
208static void 585static void req_send (aio_req req)
209send_req (aio_req req)
210{ 586{
587 while (started < wanted && nreqs >= started)
588 start_thread ();
589
211 nreqs++; 590 ++nreqs;
212 591
213 pthread_mutex_lock (&reqlock); 592 LOCK (reqlock);
214 593 reqq_push (&req_queue, req);
215 req->next = 0;
216
217 if (reqe)
218 {
219 reqe->next = req;
220 reqe = req;
221 }
222 else
223 reqe = reqs = req;
224
225 pthread_cond_signal (&reqwait); 594 pthread_cond_signal (&reqwait);
226 pthread_mutex_unlock (&reqlock); 595 UNLOCK (reqlock);
227 596
228 while (nreqs > max_outstanding) 597 if (nreqs > max_outstanding)
598 for (;;)
599 {
600 poll_cb ();
601
602 if (nreqs <= max_outstanding)
603 break;
604
605 poll_wait ();
606 }
607}
608
609static void end_thread (void)
610{
611 aio_req req;
612
613 Newz (0, req, 1, aio_cb);
614
615 req->type = REQ_QUIT;
616 req->pri = PRI_MAX + PRI_BIAS;
617
618 req_send (req);
619}
620
621static void min_parallel (int nthreads)
622{
623 if (wanted < nthreads)
624 wanted = nthreads;
625}
626
627static void max_parallel (int nthreads)
628{
629 int cur = started;
630
631 if (wanted > nthreads)
632 wanted = nthreads;
633
634 while (cur > wanted)
635 {
636 end_thread ();
637 cur--;
638 }
639
640 while (started > wanted)
229 { 641 {
230 poll_wait (); 642 poll_wait ();
231 poll_cb (); 643 poll_cb ();
232 } 644 }
233} 645}
234 646
235static void 647static void create_pipe ()
236end_thread (void)
237{ 648{
238 aio_req req; 649 if (pipe (respipe))
239 New (0, req, 1, aio_cb); 650 croak ("unable to initialize result pipe");
240 req->type = REQ_QUIT;
241 651
242 send_req (req); 652 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
243} 653 croak ("cannot set result pipe to nonblocking mode");
244 654
245 655 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
246static void min_parallel (int nthreads) 656 croak ("cannot set result pipe to nonblocking mode");
247{
248 while (nthreads > started)
249 start_thread ();
250} 657}
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 int nstarted;
273
274 for (;;) {
275 while (nreqs)
276 {
277 poll_wait ();
278 poll_cb ();
279 }
280
281 nstarted = started;
282 max_parallel (0);
283
284 pthread_mutex_lock (&reqlock);
285
286 if (!nreqs && !started)
287 break;
288
289 pthread_mutex_unlock (&reqlock);
290
291 min_parallel (fork_started);
292 }
293
294 pthread_mutex_lock (&frklock);
295 fork_started = nstarted;
296 pthread_mutex_lock (&reslock);
297
298 assert (!started);
299 assert (!nreqs);
300 assert (!reqs && !reqe);
301 assert (!ress && !rese);
302}
303
304static void atfork_parent (void)
305{
306 pthread_mutex_unlock (&reslock);
307 pthread_mutex_unlock (&frklock);
308 pthread_mutex_unlock (&reqlock);
309
310 min_parallel (fork_started);
311}
312
313#define atfork_child atfork_parent
314 658
315/*****************************************************************************/ 659/*****************************************************************************/
316/* work around various missing functions */ 660/* work around various missing functions */
317 661
318#if !HAVE_PREADWRITE 662#if !HAVE_PREADWRITE
322/* 666/*
323 * make our pread/pwrite safe against themselves, but not against 667 * make our pread/pwrite safe against themselves, but not against
324 * normal read/write by using a mutex. slows down execution a lot, 668 * normal read/write by using a mutex. slows down execution a lot,
325 * but that's your problem, not mine. 669 * but that's your problem, not mine.
326 */ 670 */
327static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER; 671static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
328 672
329static ssize_t 673static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
330pread (int fd, void *buf, size_t count, off_t offset)
331{ 674{
332 ssize_t res; 675 ssize_t res;
333 off_t ooffset; 676 off_t ooffset;
334 677
335 pthread_mutex_lock (&iolock); 678 LOCK (preadwritelock);
336 ooffset = lseek (fd, 0, SEEK_CUR); 679 ooffset = lseek (fd, 0, SEEK_CUR);
337 lseek (fd, offset, SEEK_SET); 680 lseek (fd, offset, SEEK_SET);
338 res = read (fd, buf, count); 681 res = read (fd, buf, count);
339 lseek (fd, ooffset, SEEK_SET); 682 lseek (fd, ooffset, SEEK_SET);
340 pthread_mutex_unlock (&iolock); 683 UNLOCK (preadwritelock);
341 684
342 return res; 685 return res;
343} 686}
344 687
345static ssize_t
346pwrite (int fd, void *buf, size_t count, off_t offset) 688static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
347{ 689{
348 ssize_t res; 690 ssize_t res;
349 off_t ooffset; 691 off_t ooffset;
350 692
351 pthread_mutex_lock (&iolock); 693 LOCK (preadwritelock);
352 ooffset = lseek (fd, 0, SEEK_CUR); 694 ooffset = lseek (fd, 0, SEEK_CUR);
353 lseek (fd, offset, SEEK_SET); 695 lseek (fd, offset, SEEK_SET);
354 res = write (fd, buf, count); 696 res = write (fd, buf, count);
355 lseek (fd, offset, SEEK_SET); 697 lseek (fd, offset, SEEK_SET);
356 pthread_mutex_unlock (&iolock); 698 UNLOCK (preadwritelock);
357 699
358 return res; 700 return res;
359} 701}
360#endif 702#endif
361 703
364#endif 706#endif
365 707
366#if !HAVE_READAHEAD 708#if !HAVE_READAHEAD
367# define readahead aio_readahead 709# define readahead aio_readahead
368 710
369static char readahead_buf[4096];
370
371static ssize_t
372readahead (int fd, off_t offset, size_t count) 711static ssize_t readahead (int fd, off_t offset, size_t count)
373{ 712{
713 dBUF;
714
374 while (count > 0) 715 while (count > 0)
375 { 716 {
376 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf); 717 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
377 718
378 pread (fd, readahead_buf, len, offset); 719 pread (fd, aio_buf, len, offset);
379 offset += len; 720 offset += len;
380 count -= len; 721 count -= len;
381 } 722 }
382 723
383 errno = 0; 724 errno = 0;
384} 725}
385#endif 726#endif
386 727
728#if !HAVE_READDIR_R
729# define readdir_r aio_readdir_r
730
731static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
732
733static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
734{
735 struct dirent *e;
736 int errorno;
737
738 LOCK (readdirlock);
739
740 e = readdir (dirp);
741 errorno = errno;
742
743 if (e)
744 {
745 *res = ent;
746 strcpy (ent->d_name, e->d_name);
747 }
748 else
749 *res = 0;
750
751 UNLOCK (readdirlock);
752
753 errno = errorno;
754 return e ? 0 : -1;
755}
756#endif
757
758/* sendfile always needs emulation */
759static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
760{
761 ssize_t res;
762
763 if (!count)
764 return 0;
765
766#if HAVE_SENDFILE
767# if __linux
768 res = sendfile (ofd, ifd, &offset, count);
769
770# elif __freebsd
771 /*
772 * Of course, the freebsd sendfile is a dire hack with no thoughts
773 * wasted on making it similar to other I/O functions.
774 */
775 {
776 off_t sbytes;
777 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
778
779 if (res < 0 && sbytes)
780 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
781 res = sbytes;
782 }
783
784# elif __hpux
785 res = sendfile (ofd, ifd, offset, count, 0, 0);
786
787# elif __solaris
788 {
789 struct sendfilevec vec;
790 size_t sbytes;
791
792 vec.sfv_fd = ifd;
793 vec.sfv_flag = 0;
794 vec.sfv_off = offset;
795 vec.sfv_len = count;
796
797 res = sendfilev (ofd, &vec, 1, &sbytes);
798
799 if (res < 0 && sbytes)
800 res = sbytes;
801 }
802
803# endif
804#else
805 res = -1;
806 errno = ENOSYS;
807#endif
808
809 if (res < 0
810 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
811#if __solaris
812 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
813#endif
814 )
815 )
816 {
817 /* emulate sendfile. this is a major pain in the ass */
818 dBUF;
819
820 res = 0;
821
822 while (count)
823 {
824 ssize_t cnt;
825
826 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
827
828 if (cnt <= 0)
829 {
830 if (cnt && !res) res = -1;
831 break;
832 }
833
834 cnt = write (ofd, aio_buf, cnt);
835
836 if (cnt <= 0)
837 {
838 if (cnt && !res) res = -1;
839 break;
840 }
841
842 offset += cnt;
843 res += cnt;
844 count -= cnt;
845 }
846 }
847
848 return res;
849}
850
851/* read a full directory */
852static void scandir_ (aio_req req, worker *self)
853{
854 DIR *dirp;
855 union
856 {
857 struct dirent d;
858 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
859 } *u;
860 struct dirent *entp;
861 char *name, *names;
862 int memlen = 4096;
863 int memofs = 0;
864 int res = 0;
865 int errorno;
866
867 LOCK (wrklock);
868 self->dirp = dirp = opendir (req->dataptr);
869 self->dbuf = u = malloc (sizeof (*u));
870 UNLOCK (wrklock);
871
872 req->data2ptr = names = malloc (memlen);
873
874 if (dirp && u && names)
875 for (;;)
876 {
877 errno = 0;
878 readdir_r (dirp, &u->d, &entp);
879
880 if (!entp)
881 break;
882
883 name = entp->d_name;
884
885 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
886 {
887 int len = strlen (name) + 1;
888
889 res++;
890
891 while (memofs + len > memlen)
892 {
893 memlen *= 2;
894 LOCK (wrklock);
895 req->data2ptr = names = realloc (names, memlen);
896 UNLOCK (wrklock);
897
898 if (!names)
899 break;
900 }
901
902 memcpy (names + memofs, name, len);
903 memofs += len;
904 }
905 }
906
907 if (errno)
908 res = -1;
909
910 req->result = res;
911}
912
387/*****************************************************************************/ 913/*****************************************************************************/
388 914
389static void *
390aio_proc (void *thr_arg) 915static void *aio_proc (void *thr_arg)
391{ 916{
392 aio_req req; 917 aio_req req;
393 int type; 918 int type;
919 worker *self = (worker *)thr_arg;
394 920
395 do 921 do
396 { 922 {
397 pthread_mutex_lock (&reqlock); 923 LOCK (reqlock);
398 924
399 for (;;) 925 for (;;)
400 { 926 {
401 req = reqs; 927 self->req = req = reqq_shift (&req_queue);
402
403 if (reqs)
404 {
405 reqs = reqs->next;
406 if (!reqs) reqe = 0;
407 }
408 928
409 if (req) 929 if (req)
410 break; 930 break;
411 931
412 pthread_cond_wait (&reqwait, &reqlock); 932 pthread_cond_wait (&reqwait, &reqlock);
413 } 933 }
414 934
415 pthread_mutex_unlock (&reqlock); 935 UNLOCK (reqlock);
416 936
417 errno = 0; /* strictly unnecessary */ 937 errno = 0; /* strictly unnecessary */
938 type = req->type; /* remember type for QUIT check */
418 939
419 type = req->type; 940 if (!(req->flags & FLAG_CANCELLED))
420
421 switch (type) 941 switch (type)
422 { 942 {
423 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break; 943 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
424 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break; 944 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
425 945
426 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 946 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
947 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
427 948
428 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 949 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
429 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 950 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
430 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 951 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
431 952
432 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 953 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
433 case REQ_CLOSE: req->result = close (req->fd); break; 954 case REQ_CLOSE: req->result = close (req->fd); break;
434 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 955 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
435 case REQ_RMDIR: req->result = rmdir (req->dataptr); break; 956 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
957 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
958 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
436 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break; 959 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
437 960
438 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 961 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
439 case REQ_FSYNC: req->result = fsync (req->fd); break; 962 case REQ_FSYNC: req->result = fsync (req->fd); break;
963 case REQ_READDIR: scandir_ (req, self); break;
440 964
965 case REQ_BUSY:
966 {
967 struct timeval tv;
968
969 tv.tv_sec = req->fd;
970 tv.tv_usec = req->fd2;
971
972 req->result = select (0, 0, 0, 0, &tv);
973 }
974
975 case REQ_GROUP:
976 case REQ_NOP:
441 case REQ_QUIT: 977 case REQ_QUIT:
442 break; 978 break;
443 979
444 default: 980 default:
445 req->result = ENOSYS; 981 req->result = ENOSYS;
446 break; 982 break;
447 } 983 }
448 984
449 req->errorno = errno; 985 req->errorno = errno;
450 986
451 pthread_mutex_lock (&reslock); 987 LOCK (reslock);
452 988
453 req->next = 0; 989 if (!reqq_push (&res_queue, req))
454
455 if (rese)
456 {
457 rese->next = req;
458 rese = req;
459 }
460 else
461 {
462 rese = ress = req;
463
464 /* write a dummy byte to the pipe so fh becomes ready */ 990 /* write a dummy byte to the pipe so fh becomes ready */
465 write (respipe [1], &respipe, 1); 991 write (respipe [1], &respipe, 1);
466 }
467 992
468 pthread_mutex_unlock (&reslock); 993 self->req = 0;
994 worker_clear (self);
995
996 UNLOCK (reslock);
469 } 997 }
470 while (type != REQ_QUIT); 998 while (type != REQ_QUIT);
471 999
1000 LOCK (wrklock);
1001 worker_free (self);
1002 UNLOCK (wrklock);
1003
472 return 0; 1004 return 0;
1005}
1006
1007/*****************************************************************************/
1008
1009static void atfork_prepare (void)
1010{
1011 LOCK (wrklock);
1012 LOCK (reqlock);
1013 LOCK (reslock);
1014#if !HAVE_PREADWRITE
1015 LOCK (preadwritelock);
1016#endif
1017#if !HAVE_READDIR_R
1018 LOCK (readdirlock);
1019#endif
1020}
1021
1022static void atfork_parent (void)
1023{
1024#if !HAVE_READDIR_R
1025 UNLOCK (readdirlock);
1026#endif
1027#if !HAVE_PREADWRITE
1028 UNLOCK (preadwritelock);
1029#endif
1030 UNLOCK (reslock);
1031 UNLOCK (reqlock);
1032 UNLOCK (wrklock);
1033}
1034
1035static void atfork_child (void)
1036{
1037 aio_req prv;
1038
1039 while (prv = reqq_shift (&req_queue))
1040 req_free (prv);
1041
1042 while (prv = reqq_shift (&res_queue))
1043 req_free (prv);
1044
1045 while (wrk_first.next != &wrk_first)
1046 {
1047 worker *wrk = wrk_first.next;
1048
1049 if (wrk->req)
1050 req_free (wrk->req);
1051
1052 worker_clear (wrk);
1053 worker_free (wrk);
1054 }
1055
1056 started = 0;
1057 nreqs = 0;
1058
1059 close (respipe [0]);
1060 close (respipe [1]);
1061 create_pipe ();
1062
1063 atfork_parent ();
473} 1064}
474 1065
475#define dREQ \ 1066#define dREQ \
476 aio_req req; \ 1067 aio_req req; \
1068 int req_pri = next_pri; \
1069 next_pri = DEFAULT_PRI + PRI_BIAS; \
477 \ 1070 \
478 if (SvOK (callback) && !SvROK (callback)) \ 1071 if (SvOK (callback) && !SvROK (callback)) \
479 croak ("clalback must be undef or of reference type"); \ 1072 croak ("callback must be undef or of reference type"); \
480 \ 1073 \
481 Newz (0, req, 1, aio_cb); \ 1074 Newz (0, req, 1, aio_cb); \
482 if (!req) \ 1075 if (!req) \
483 croak ("out of memory during aio_req allocation"); \ 1076 croak ("out of memory during aio_req allocation"); \
484 \ 1077 \
485 req->callback = SvREFCNT_inc (callback); 1078 req->callback = newSVsv (callback); \
1079 req->pri = req_pri
1080
1081#define REQ_SEND \
1082 req_send (req); \
1083 \
1084 if (GIMME_V != G_VOID) \
1085 XPUSHs (req_sv (req, AIO_REQ_KLASS));
486 1086
487MODULE = IO::AIO PACKAGE = IO::AIO 1087MODULE = IO::AIO PACKAGE = IO::AIO
488 1088
489PROTOTYPES: ENABLE 1089PROTOTYPES: ENABLE
490 1090
491BOOT: 1091BOOT:
492{ 1092{
493 if (pipe (respipe)) 1093 HV *stash = gv_stashpv ("IO::AIO", 1);
494 croak ("unable to initialize result pipe"); 1094 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1095 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1096 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
495 1097
496 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1098 create_pipe ();
497 croak ("cannot set result pipe to nonblocking mode");
498
499 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
500 croak ("cannot set result pipe to nonblocking mode");
501
502 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 1099 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
503} 1100}
504 1101
505void 1102void
506min_parallel(nthreads) 1103min_parallel (nthreads)
507 int nthreads 1104 int nthreads
508 PROTOTYPE: $ 1105 PROTOTYPE: $
509 1106
510void 1107void
511max_parallel(nthreads) 1108max_parallel (nthreads)
512 int nthreads 1109 int nthreads
513 PROTOTYPE: $ 1110 PROTOTYPE: $
514 1111
515int 1112int
516max_outstanding(nreqs) 1113max_outstanding (nreqs)
517 int nreqs 1114 int nreqs
518 PROTOTYPE: $ 1115 PROTOTYPE: $
519 CODE: 1116 CODE:
520 RETVAL = max_outstanding; 1117 RETVAL = max_outstanding;
521 max_outstanding = nreqs; 1118 max_outstanding = nreqs;
522 1119
523void 1120void
524aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1121aio_open (pathname,flags,mode,callback=&PL_sv_undef)
525 SV * pathname 1122 SV * pathname
526 int flags 1123 int flags
527 int mode 1124 int mode
528 SV * callback 1125 SV * callback
529 PROTOTYPE: $$$;$ 1126 PROTOTYPE: $$$;$
530 CODE: 1127 PPCODE:
531{ 1128{
532 dREQ; 1129 dREQ;
533 1130
534 req->type = REQ_OPEN; 1131 req->type = REQ_OPEN;
535 req->data = newSVsv (pathname); 1132 req->data = newSVsv (pathname);
536 req->dataptr = SvPVbyte_nolen (req->data); 1133 req->dataptr = SvPVbyte_nolen (req->data);
537 req->fd = flags; 1134 req->fd = flags;
538 req->mode = mode; 1135 req->mode = mode;
539 1136
540 send_req (req); 1137 REQ_SEND;
541} 1138}
542 1139
543void 1140void
544aio_close(fh,callback=&PL_sv_undef) 1141aio_close (fh,callback=&PL_sv_undef)
545 SV * fh 1142 SV * fh
546 SV * callback 1143 SV * callback
547 PROTOTYPE: $;$ 1144 PROTOTYPE: $;$
548 ALIAS: 1145 ALIAS:
549 aio_close = REQ_CLOSE 1146 aio_close = REQ_CLOSE
550 aio_fsync = REQ_FSYNC 1147 aio_fsync = REQ_FSYNC
551 aio_fdatasync = REQ_FDATASYNC 1148 aio_fdatasync = REQ_FDATASYNC
552 CODE: 1149 PPCODE:
553{ 1150{
554 dREQ; 1151 dREQ;
555 1152
556 req->type = ix; 1153 req->type = ix;
557 req->fh = newSVsv (fh); 1154 req->fh = newSVsv (fh);
558 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1155 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
559 1156
560 send_req (req); 1157 REQ_SEND (req);
561} 1158}
562 1159
563void 1160void
564aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1161aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
565 SV * fh 1162 SV * fh
566 UV offset 1163 UV offset
567 IV length 1164 UV length
568 SV * data 1165 SV * data
569 IV dataoffset 1166 UV dataoffset
570 SV * callback 1167 SV * callback
571 ALIAS: 1168 ALIAS:
572 aio_read = REQ_READ 1169 aio_read = REQ_READ
573 aio_write = REQ_WRITE 1170 aio_write = REQ_WRITE
574 PROTOTYPE: $$$$$;$ 1171 PROTOTYPE: $$$$$;$
575 CODE: 1172 PPCODE:
576{ 1173{
577 aio_req req; 1174 aio_req req;
578 STRLEN svlen; 1175 STRLEN svlen;
579 char *svptr = SvPVbyte (data, svlen); 1176 char *svptr = SvPVbyte (data, svlen);
580 1177
611 : IoOFP (sv_2io (fh))); 1208 : IoOFP (sv_2io (fh)));
612 req->offset = offset; 1209 req->offset = offset;
613 req->length = length; 1210 req->length = length;
614 req->data = SvREFCNT_inc (data); 1211 req->data = SvREFCNT_inc (data);
615 req->dataptr = (char *)svptr + dataoffset; 1212 req->dataptr = (char *)svptr + dataoffset;
616 req->callback = SvREFCNT_inc (callback);
617 1213
618 send_req (req); 1214 if (!SvREADONLY (data))
1215 {
1216 SvREADONLY_on (data);
1217 req->data2ptr = (void *)data;
1218 }
1219
1220 REQ_SEND;
619 } 1221 }
620} 1222}
621 1223
622void 1224void
1225aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1226 SV * out_fh
1227 SV * in_fh
1228 UV in_offset
1229 UV length
1230 SV * callback
1231 PROTOTYPE: $$$$;$
1232 PPCODE:
1233{
1234 dREQ;
1235
1236 req->type = REQ_SENDFILE;
1237 req->fh = newSVsv (out_fh);
1238 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1239 req->fh2 = newSVsv (in_fh);
1240 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1241 req->offset = in_offset;
1242 req->length = length;
1243
1244 REQ_SEND;
1245}
1246
1247void
623aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1248aio_readahead (fh,offset,length,callback=&PL_sv_undef)
624 SV * fh 1249 SV * fh
625 UV offset 1250 UV offset
626 IV length 1251 IV length
627 SV * callback 1252 SV * callback
628 PROTOTYPE: $$$;$ 1253 PROTOTYPE: $$$;$
629 CODE: 1254 PPCODE:
630{ 1255{
631 dREQ; 1256 dREQ;
632 1257
633 req->type = REQ_READAHEAD; 1258 req->type = REQ_READAHEAD;
634 req->fh = newSVsv (fh); 1259 req->fh = newSVsv (fh);
635 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1260 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
636 req->offset = offset; 1261 req->offset = offset;
637 req->length = length; 1262 req->length = length;
638 1263
639 send_req (req); 1264 REQ_SEND;
640} 1265}
641 1266
642void 1267void
643aio_stat(fh_or_path,callback=&PL_sv_undef) 1268aio_stat (fh_or_path,callback=&PL_sv_undef)
644 SV * fh_or_path 1269 SV * fh_or_path
645 SV * callback 1270 SV * callback
646 ALIAS: 1271 ALIAS:
647 aio_stat = REQ_STAT 1272 aio_stat = REQ_STAT
648 aio_lstat = REQ_LSTAT 1273 aio_lstat = REQ_LSTAT
649 CODE: 1274 PPCODE:
650{ 1275{
651 dREQ; 1276 dREQ;
652 1277
653 New (0, req->statdata, 1, Stat_t); 1278 New (0, req->statdata, 1, Stat_t);
654 if (!req->statdata) 1279 if (!req->statdata)
1280 {
1281 req_free (req);
655 croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)"); 1282 croak ("out of memory during aio_req->statdata allocation");
1283 }
656 1284
657 if (SvPOK (fh_or_path)) 1285 if (SvPOK (fh_or_path))
658 { 1286 {
659 req->type = ix; 1287 req->type = ix;
660 req->data = newSVsv (fh_or_path); 1288 req->data = newSVsv (fh_or_path);
665 req->type = REQ_FSTAT; 1293 req->type = REQ_FSTAT;
666 req->fh = newSVsv (fh_or_path); 1294 req->fh = newSVsv (fh_or_path);
667 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1295 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
668 } 1296 }
669 1297
670 send_req (req); 1298 REQ_SEND;
671} 1299}
672 1300
673void 1301void
674aio_unlink(pathname,callback=&PL_sv_undef) 1302aio_unlink (pathname,callback=&PL_sv_undef)
675 SV * pathname 1303 SV * pathname
676 SV * callback 1304 SV * callback
677 ALIAS: 1305 ALIAS:
678 aio_unlink = REQ_UNLINK 1306 aio_unlink = REQ_UNLINK
679 aio_rmdir = REQ_RMDIR 1307 aio_rmdir = REQ_RMDIR
1308 aio_readdir = REQ_READDIR
680 CODE: 1309 PPCODE:
681{ 1310{
682 dREQ; 1311 dREQ;
683 1312
684 req->type = ix; 1313 req->type = ix;
685 req->data = newSVsv (pathname); 1314 req->data = newSVsv (pathname);
686 req->dataptr = SvPVbyte_nolen (req->data); 1315 req->dataptr = SvPVbyte_nolen (req->data);
687 1316
688 send_req (req); 1317 REQ_SEND;
689} 1318}
690 1319
691void 1320void
692aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 1321aio_link (oldpath,newpath,callback=&PL_sv_undef)
693 SV * oldpath 1322 SV * oldpath
694 SV * newpath 1323 SV * newpath
695 SV * callback 1324 SV * callback
1325 ALIAS:
1326 aio_link = REQ_LINK
1327 aio_symlink = REQ_SYMLINK
1328 aio_rename = REQ_RENAME
696 CODE: 1329 PPCODE:
697{ 1330{
698 dREQ; 1331 dREQ;
699 1332
700 req->type = REQ_SYMLINK; 1333 req->type = ix;
701 req->fh = newSVsv (oldpath); 1334 req->fh = newSVsv (oldpath);
702 req->data2ptr = SvPVbyte_nolen (req->fh); 1335 req->data2ptr = SvPVbyte_nolen (req->fh);
703 req->data = newSVsv (newpath); 1336 req->data = newSVsv (newpath);
704 req->dataptr = SvPVbyte_nolen (req->data); 1337 req->dataptr = SvPVbyte_nolen (req->data);
705 1338
706 send_req (req); 1339 REQ_SEND;
707} 1340}
708 1341
709void 1342void
1343aio_busy (delay,callback=&PL_sv_undef)
1344 double delay
1345 SV * callback
1346 PPCODE:
1347{
1348 dREQ;
1349
1350 req->type = REQ_BUSY;
1351 req->fd = delay < 0. ? 0 : delay;
1352 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1353
1354 REQ_SEND;
1355}
1356
1357void
1358aio_group (callback=&PL_sv_undef)
1359 SV * callback
1360 PROTOTYPE: ;$
1361 PPCODE:
1362{
1363 dREQ;
1364
1365 req->type = REQ_GROUP;
1366 req_send (req);
1367
1368 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1369}
1370
1371void
1372aio_nop (callback=&PL_sv_undef)
1373 SV * callback
1374 PPCODE:
1375{
1376 dREQ;
1377
1378 req->type = REQ_NOP;
1379
1380 REQ_SEND;
1381}
1382
1383void
1384aioreq_pri (int pri = DEFAULT_PRI)
1385 CODE:
1386 if (pri < PRI_MIN) pri = PRI_MIN;
1387 if (pri > PRI_MAX) pri = PRI_MAX;
1388 next_pri = pri + PRI_BIAS;
1389
1390void
1391aioreq_nice (int nice = 0)
1392 CODE:
1393 nice = next_pri - nice;
1394 if (nice < PRI_MIN) nice = PRI_MIN;
1395 if (nice > PRI_MAX) nice = PRI_MAX;
1396 next_pri = nice + PRI_BIAS;
1397
1398void
710flush() 1399flush ()
711 PROTOTYPE: 1400 PROTOTYPE:
712 CODE: 1401 CODE:
713 while (nreqs) 1402 while (nreqs)
714 { 1403 {
715 poll_wait (); 1404 poll_wait ();
755 CODE: 1444 CODE:
756 RETVAL = nreqs; 1445 RETVAL = nreqs;
757 OUTPUT: 1446 OUTPUT:
758 RETVAL 1447 RETVAL
759 1448
1449PROTOTYPES: DISABLE
1450
1451MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1452
1453void
1454cancel (aio_req_ornot req)
1455 CODE:
1456 req_cancel (req);
1457
1458void
1459cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1460 CODE:
1461 SvREFCNT_dec (req->callback);
1462 req->callback = newSVsv (callback);
1463
1464MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1465
1466void
1467add (aio_req grp, ...)
1468 PPCODE:
1469{
1470 int i;
1471 aio_req req;
1472
1473 if (grp->fd == 2)
1474 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1475
1476 for (i = 1; i < items; ++i )
1477 {
1478 if (GIMME_V != G_VOID)
1479 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1480
1481 req = SvAIO_REQ (ST (i));
1482
1483 if (req)
1484 {
1485 ++grp->length;
1486 req->grp = grp;
1487
1488 req->grp_prev = 0;
1489 req->grp_next = grp->grp_first;
1490
1491 if (grp->grp_first)
1492 grp->grp_first->grp_prev = req;
1493
1494 grp->grp_first = req;
1495 }
1496 }
1497}
1498
1499void
1500result (aio_req grp, ...)
1501 CODE:
1502{
1503 int i;
1504 AV *av = newAV ();
1505
1506 for (i = 1; i < items; ++i )
1507 av_push (av, newSVsv (ST (i)));
1508
1509 SvREFCNT_dec (grp->data);
1510 grp->data = (SV *)av;
1511}
1512
1513void
1514limit (aio_req grp, int limit)
1515 CODE:
1516 grp->fd2 = limit;
1517 aio_grp_feed (grp);
1518
1519void
1520feed (aio_req grp, SV *callback=&PL_sv_undef)
1521 CODE:
1522{
1523 SvREFCNT_dec (grp->fh2);
1524 grp->fh2 = newSVsv (callback);
1525
1526 if (grp->fd2 <= 0)
1527 grp->fd2 = 2;
1528
1529 aio_grp_feed (grp);
1530}
1531

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