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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.14 by root, Sat Jul 23 18:15:36 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
8#define _REENTRANT 1
9
10#include <errno.h>
11
12#include "EXTERN.h"
1#include "perl.h" 13#include "perl.h"
2#include "XSUB.h" 14#include "XSUB.h"
3 15
16#include "autoconf/config.h"
17
18#include <pthread.h>
19
20#include <stddef.h>
21#include <errno.h>
22#include <sys/time.h>
23#include <sys/select.h>
4#include <sys/types.h> 24#include <sys/types.h>
5#include <sys/stat.h> 25#include <sys/stat.h>
6 26#include <limits.h>
7#include <unistd.h> 27#include <unistd.h>
8#include <fcntl.h> 28#include <fcntl.h>
9#include <signal.h> 29#include <signal.h>
10#include <sched.h> 30#include <sched.h>
31
32#if HAVE_SENDFILE
11#if __linux 33# if __linux
34# include <sys/sendfile.h>
35# elif __freebsd
12#include <sys/syscall.h> 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
13#endif 44# endif
45#endif
14 46
15#include <pthread.h> 47/* used for struct dirent, AIX doesn't provide it */
16 48#ifndef NAME_MAX
17typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49# define NAME_MAX 4096
18typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 50#endif
19typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
20 51
21#if __ia64 52#if __ia64
22# define STACKSIZE 65536 53# define STACKSIZE 65536
54#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55# define STACKSIZE PTHREAD_STACK_MIN
23#else 56#else
24# define STACKSIZE 4096 57# define STACKSIZE 16384
25#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;
26 70
27enum { 71enum {
28 REQ_QUIT, 72 REQ_QUIT,
29 REQ_OPEN, REQ_CLOSE, 73 REQ_OPEN, REQ_CLOSE,
30 REQ_READ, REQ_WRITE, REQ_READAHEAD, 74 REQ_READ, REQ_WRITE, REQ_READAHEAD,
75 REQ_SENDFILE,
31 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 76 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
32 REQ_FSYNC, REQ_FDATASYNC, 77 REQ_FSYNC, REQ_FDATASYNC,
78 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
79 REQ_READDIR,
80 REQ_LINK, REQ_SYMLINK,
81 REQ_GROUP, REQ_NOP,
82 REQ_BUSY,
33}; 83};
34 84
85#define AIO_REQ_KLASS "IO::AIO::REQ"
86#define AIO_GRP_KLASS "IO::AIO::GRP"
87
35typedef struct aio_cb { 88typedef struct aio_cb
89{
36 struct aio_cb *volatile next; 90 struct aio_cb *volatile next;
37 91
38 int type; 92 SV *data, *callback;
39 93 SV *fh, *fh2;
40 int fd; 94 void *dataptr, *data2ptr;
95 Stat_t *statdata;
41 off_t offset; 96 off_t offset;
42 size_t length; 97 size_t length;
43 ssize_t result; 98 ssize_t result;
99
100 STRLEN dataoffset;
101 int type;
102 int fd, fd2;
103 int errorno;
44 mode_t mode; /* open */ 104 mode_t mode; /* open */
45 int errorno;
46 SV *data, *callback, *fh;
47 void *dataptr;
48 STRLEN dataoffset;
49 105
50 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;
51} aio_cb; 111} aio_cb;
52 112
113enum {
114 FLAG_CANCELLED = 0x01,
115};
116
53typedef aio_cb *aio_req; 117typedef aio_cb *aio_req;
118typedef aio_cb *aio_req_ornot;
54 119
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
55static int started; 131static int started, wanted;
56static volatile int nreqs; 132static volatile int nreqs;
57static int max_outstanding = 1<<30; 133static int max_outstanding = 1<<30;
58static int respipe [2]; 134static int respipe [2];
59 135
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
60static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 185static pthread_mutex_t reslock = AIO_MUTEX_INIT;
61static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 186static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
62static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 187static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
63 188
64static volatile aio_req reqs, reqe; /* queue start, queue end */ 189/*
65static 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;
66 198
67static void 199static reqq req_queue;
68poll_wait () 200static reqq res_queue;
201
202int reqq_push (reqq *q, aio_req req)
69{ 203{
70 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;
71 { 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{
72 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
73 FD_ZERO(&rfd); 334 FD_ZERO(&rfd);
74 FD_SET(respipe [0], &rfd); 335 FD_SET(respipe [0], &rfd);
75 336
76 select (respipe [0] + 1, &rfd, 0, 0, 0); 337 select (respipe [0] + 1, &rfd, 0, 0, 0);
77 } 338 }
78} 339}
79 340
80static int 341static void req_invoke (aio_req req)
81poll_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 ()
82{ 487{
83 dSP; 488 dSP;
84 int count = 0; 489 int count = 0;
490 int do_croak = 0;
85 aio_req req, prv; 491 aio_req req;
86 492
87 pthread_mutex_lock (&reslock); 493 for (;;)
88
89 { 494 {
495 LOCK (reslock);
496 req = reqq_shift (&res_queue);
497
498 if (req)
499 {
500 if (!res_queue.size)
501 {
90 /* read any signals sent by the worker threads */ 502 /* read any signals sent by the worker threads */
91 char buf [32]; 503 char buf [32];
92 while (read (respipe [0], buf, 32) > 0) 504 while (read (respipe [0], buf, 32) == 32)
505 ;
506 }
93 ; 507 }
94 }
95 508
96 req = ress; 509 UNLOCK (reslock);
97 ress = rese = 0;
98 510
99 pthread_mutex_unlock (&reslock); 511 if (!req)
512 break;
100 513
101 while (req)
102 {
103 nreqs--; 514 --nreqs;
104 515
105 if (req->type == REQ_QUIT) 516 if (req->type == REQ_QUIT)
106 started--; 517 started--;
518 else if (req->type == REQ_GROUP && req->length)
519 {
520 req->fd = 1; /* mark request as delayed */
521 continue;
522 }
107 else 523 else
108 { 524 {
109 int errorno = errno;
110 errno = req->errorno;
111
112 if (req->type == REQ_READ) 525 if (req->type == REQ_READ)
113 SvCUR_set (req->data, req->dataoffset 526 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
114 + req->result > 0 ? req->result : 0);
115 527
528 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
529 SvREADONLY_off (req->data);
530
116 if (req->data) 531 if (req->statdata)
117 SvREFCNT_dec (req->data);
118
119 if (req->fh)
120 SvREFCNT_dec (req->fh);
121
122 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
123 { 532 {
124 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 533 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
125 PL_laststatval = req->result; 534 PL_laststatval = req->result;
126 PL_statcache = *(req->statdata); 535 PL_statcache = *(req->statdata);
127
128 Safefree (req->statdata);
129 } 536 }
130 537
131 ENTER; 538 req_invoke (req);
132 PUSHMARK (SP);
133 XPUSHs (sv_2mortal (newSViv (req->result)));
134 539
135 if (req->type == REQ_OPEN)
136 {
137 /* convert fd to fh */
138 SV *fh;
139
140 PUTBACK;
141 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
142 SPAGAIN;
143
144 fh = SvREFCNT_inc (POPs);
145
146 PUSHMARK (SP);
147 XPUSHs (sv_2mortal (fh));
148 }
149
150 if (SvOK (req->callback))
151 {
152 PUTBACK;
153 call_sv (req->callback, G_VOID | G_EVAL);
154 SPAGAIN;
155 }
156
157 LEAVE;
158
159 if (req->callback)
160 SvREFCNT_dec (req->callback);
161
162 errno = errorno;
163 count++; 540 count++;
164 } 541 }
165 542
166 prv = req;
167 req = req->next;
168 Safefree (prv); 543 req_free (req);
169
170 /* TODO: croak on errors? */
171 } 544 }
172 545
173 return count; 546 return count;
174} 547}
175 548
176static void *aio_proc(void *arg); 549static void *aio_proc(void *arg);
177 550
178static void
179start_thread (void) 551static void start_thread (void)
180{ 552{
553 worker *wrk = calloc (1, sizeof (worker));
554
555 if (!wrk)
556 croak ("unable to allocate worker thread data");
557
181 sigset_t fullsigset, oldsigset; 558 sigset_t fullsigset, oldsigset;
182 pthread_t tid;
183 pthread_attr_t attr; 559 pthread_attr_t attr;
184 560
185 pthread_attr_init (&attr); 561 pthread_attr_init (&attr);
186 pthread_attr_setstacksize (&attr, STACKSIZE); 562 pthread_attr_setstacksize (&attr, STACKSIZE);
187 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 563 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
188 564
189 sigfillset (&fullsigset); 565 sigfillset (&fullsigset);
566
567 LOCK (wrklock);
190 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 568 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
191 569
192 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;
193 started++; 576 started++;
577 }
578 else
579 free (wrk);
194 580
195 sigprocmask (SIG_SETMASK, &oldsigset, 0); 581 sigprocmask (SIG_SETMASK, &oldsigset, 0);
582 UNLOCK (wrklock);
196} 583}
197 584
198static void 585static void req_send (aio_req req)
199send_req (aio_req req)
200{ 586{
587 while (started < wanted && nreqs >= started)
588 start_thread ();
589
201 nreqs++; 590 ++nreqs;
202 591
203 pthread_mutex_lock (&reqlock); 592 LOCK (reqlock);
204 593 reqq_push (&req_queue, req);
205 req->next = 0;
206
207 if (reqe)
208 {
209 reqe->next = req;
210 reqe = req;
211 }
212 else
213 reqe = reqs = req;
214
215 pthread_cond_signal (&reqwait); 594 pthread_cond_signal (&reqwait);
216 pthread_mutex_unlock (&reqlock); 595 UNLOCK (reqlock);
217 596
218 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)
219 { 641 {
220 poll_wait (); 642 poll_wait ();
221 poll_cb (); 643 poll_cb ();
222 } 644 }
223} 645}
224 646
225static void 647static void create_pipe ()
226end_thread (void)
227{ 648{
228 aio_req req; 649 if (pipe (respipe))
229 New (0, req, 1, aio_cb); 650 croak ("unable to initialize result pipe");
230 req->type = REQ_QUIT;
231 651
232 send_req (req); 652 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
233} 653 croak ("cannot set result pipe to nonblocking mode");
234 654
235static void * 655 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
656 croak ("cannot set result pipe to nonblocking mode");
657}
658
659/*****************************************************************************/
660/* work around various missing functions */
661
662#if !HAVE_PREADWRITE
663# define pread aio_pread
664# define pwrite aio_pwrite
665
666/*
667 * make our pread/pwrite safe against themselves, but not against
668 * normal read/write by using a mutex. slows down execution a lot,
669 * but that's your problem, not mine.
670 */
671static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
672
673static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
674{
675 ssize_t res;
676 off_t ooffset;
677
678 LOCK (preadwritelock);
679 ooffset = lseek (fd, 0, SEEK_CUR);
680 lseek (fd, offset, SEEK_SET);
681 res = read (fd, buf, count);
682 lseek (fd, ooffset, SEEK_SET);
683 UNLOCK (preadwritelock);
684
685 return res;
686}
687
688static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
689{
690 ssize_t res;
691 off_t ooffset;
692
693 LOCK (preadwritelock);
694 ooffset = lseek (fd, 0, SEEK_CUR);
695 lseek (fd, offset, SEEK_SET);
696 res = write (fd, buf, count);
697 lseek (fd, offset, SEEK_SET);
698 UNLOCK (preadwritelock);
699
700 return res;
701}
702#endif
703
704#if !HAVE_FDATASYNC
705# define fdatasync fsync
706#endif
707
708#if !HAVE_READAHEAD
709# define readahead aio_readahead
710
711static ssize_t readahead (int fd, off_t offset, size_t count)
712{
713 dBUF;
714
715 while (count > 0)
716 {
717 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
718
719 pread (fd, aio_buf, len, offset);
720 offset += len;
721 count -= len;
722 }
723
724 errno = 0;
725}
726#endif
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
913/*****************************************************************************/
914
236aio_proc (void *thr_arg) 915static void *aio_proc (void *thr_arg)
237{ 916{
238 aio_req req; 917 aio_req req;
239 int type; 918 int type;
919 worker *self = (worker *)thr_arg;
240 920
241 do 921 do
242 { 922 {
243 pthread_mutex_lock (&reqlock); 923 LOCK (reqlock);
244 924
245 for (;;) 925 for (;;)
246 { 926 {
247 req = reqs; 927 self->req = req = reqq_shift (&req_queue);
248
249 if (reqs)
250 {
251 reqs = reqs->next;
252 if (!reqs) reqe = 0;
253 }
254 928
255 if (req) 929 if (req)
256 break; 930 break;
257 931
258 pthread_cond_wait (&reqwait, &reqlock); 932 pthread_cond_wait (&reqwait, &reqlock);
259 } 933 }
260 934
261 pthread_mutex_unlock (&reqlock); 935 UNLOCK (reqlock);
262 936
263 errno = 0; /* strictly unnecessary */ 937 errno = 0; /* strictly unnecessary */
938 type = req->type; /* remember type for QUIT check */
264 939
265 type = req->type; 940 if (!(req->flags & FLAG_CANCELLED))
266
267 switch (type) 941 switch (type)
268 { 942 {
269 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;
270 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;
271#if SYS_readahead 945
272 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;
273#else 947 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
274 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
275#endif
276 948
277 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 949 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
278 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 950 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
279 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 951 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
280 952
281 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;
282 case REQ_CLOSE: req->result = close (req->fd); break; 954 case REQ_CLOSE: req->result = close (req->fd); break;
283 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 955 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
284
285 case REQ_FSYNC: req->result = fsync (req->fd); 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;
959 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
960
286 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 961 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
962 case REQ_FSYNC: req->result = fsync (req->fd); break;
963 case REQ_READDIR: scandir_ (req, self); break;
287 964
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:
288 case REQ_QUIT: 977 case REQ_QUIT:
289 break; 978 break;
290 979
291 default: 980 default:
292 req->result = ENOSYS; 981 req->result = ENOSYS;
293 break; 982 break;
294 } 983 }
295 984
296 req->errorno = errno; 985 req->errorno = errno;
297 986
298 pthread_mutex_lock (&reslock); 987 LOCK (reslock);
299 988
300 req->next = 0; 989 if (!reqq_push (&res_queue, req))
301
302 if (rese)
303 {
304 rese->next = req;
305 rese = req;
306 }
307 else
308 {
309 rese = ress = req;
310
311 /* write a dummy byte to the pipe so fh becomes ready */ 990 /* write a dummy byte to the pipe so fh becomes ready */
312 write (respipe [1], &respipe, 1); 991 write (respipe [1], &respipe, 1);
313 }
314 992
315 pthread_mutex_unlock (&reslock); 993 self->req = 0;
994 worker_clear (self);
995
996 UNLOCK (reslock);
316 } 997 }
317 while (type != REQ_QUIT); 998 while (type != REQ_QUIT);
318 999
1000 LOCK (wrklock);
1001 worker_free (self);
1002 UNLOCK (wrklock);
1003
319 return 0; 1004 return 0;
320} 1005}
321 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 ();
1064}
1065
1066#define dREQ \
1067 aio_req req; \
1068 int req_pri = next_pri; \
1069 next_pri = DEFAULT_PRI + PRI_BIAS; \
1070 \
1071 if (SvOK (callback) && !SvROK (callback)) \
1072 croak ("callback must be undef or of reference type"); \
1073 \
1074 Newz (0, req, 1, aio_cb); \
1075 if (!req) \
1076 croak ("out of memory during aio_req allocation"); \
1077 \
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));
1086
322MODULE = IO::AIO PACKAGE = IO::AIO 1087MODULE = IO::AIO PACKAGE = IO::AIO
323 1088
324PROTOTYPES: ENABLE 1089PROTOTYPES: ENABLE
325 1090
326BOOT: 1091BOOT:
327{ 1092{
328 if (pipe (respipe)) 1093 HV *stash = gv_stashpv ("IO::AIO", 1);
329 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));
330 1097
331 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1098 create_pipe ();
332 croak ("cannot set result pipe to nonblocking mode"); 1099 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
333
334 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
335 croak ("cannot set result pipe to nonblocking mode");
336} 1100}
337 1101
338void 1102void
339min_parallel(nthreads) 1103min_parallel (nthreads)
340 int nthreads 1104 int nthreads
341 PROTOTYPE: $ 1105 PROTOTYPE: $
342 CODE:
343 while (nthreads > started)
344 start_thread ();
345 1106
346void 1107void
347max_parallel(nthreads) 1108max_parallel (nthreads)
348 int nthreads 1109 int nthreads
349 PROTOTYPE: $ 1110 PROTOTYPE: $
350 CODE:
351{
352 int cur = started;
353 while (cur > nthreads)
354 {
355 end_thread ();
356 cur--;
357 }
358
359 while (started > nthreads)
360 {
361 poll_wait ();
362 poll_cb ();
363 }
364}
365 1111
366int 1112int
367max_outstanding(nreqs) 1113max_outstanding (nreqs)
368 int nreqs 1114 int nreqs
369 PROTOTYPE: $ 1115 PROTOTYPE: $
370 CODE: 1116 CODE:
371 RETVAL = max_outstanding; 1117 RETVAL = max_outstanding;
372 max_outstanding = nreqs; 1118 max_outstanding = nreqs;
373 1119
374void 1120void
375aio_open(pathname,flags,mode,callback=&PL_sv_undef) 1121aio_open (pathname,flags,mode,callback=&PL_sv_undef)
376 SV * pathname 1122 SV * pathname
377 int flags 1123 int flags
378 int mode 1124 int mode
379 SV * callback 1125 SV * callback
380 PROTOTYPE: $$$;$ 1126 PROTOTYPE: $$$;$
381 CODE: 1127 PPCODE:
382{ 1128{
383 aio_req req; 1129 dREQ;
384
385 Newz (0, req, 1, aio_cb);
386
387 if (!req)
388 croak ("out of memory during aio_req allocation");
389 1130
390 req->type = REQ_OPEN; 1131 req->type = REQ_OPEN;
391 req->data = newSVsv (pathname); 1132 req->data = newSVsv (pathname);
392 req->dataptr = SvPV_nolen (req->data); 1133 req->dataptr = SvPVbyte_nolen (req->data);
393 req->fd = flags; 1134 req->fd = flags;
394 req->mode = mode; 1135 req->mode = mode;
395 req->callback = SvREFCNT_inc (callback);
396 1136
397 send_req (req); 1137 REQ_SEND;
398} 1138}
399 1139
400void 1140void
401aio_close(fh,callback=&PL_sv_undef) 1141aio_close (fh,callback=&PL_sv_undef)
402 SV * fh 1142 SV * fh
403 SV * callback 1143 SV * callback
404 PROTOTYPE: $;$ 1144 PROTOTYPE: $;$
405 ALIAS: 1145 ALIAS:
406 aio_close = REQ_CLOSE 1146 aio_close = REQ_CLOSE
407 aio_fsync = REQ_FSYNC 1147 aio_fsync = REQ_FSYNC
408 aio_fdatasync = REQ_FDATASYNC 1148 aio_fdatasync = REQ_FDATASYNC
409 CODE: 1149 PPCODE:
410{ 1150{
411 aio_req req; 1151 dREQ;
412
413 Newz (0, req, 1, aio_cb);
414
415 if (!req)
416 croak ("out of memory during aio_req allocation");
417 1152
418 req->type = ix; 1153 req->type = ix;
419 req->fh = newSVsv (fh); 1154 req->fh = newSVsv (fh);
420 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1155 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
421 req->callback = SvREFCNT_inc (callback);
422 1156
423 send_req (req); 1157 REQ_SEND (req);
424} 1158}
425 1159
426void 1160void
427aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 1161aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
428 SV * fh 1162 SV * fh
429 UV offset 1163 UV offset
430 IV length 1164 UV length
431 SV * data 1165 SV * data
432 IV dataoffset 1166 UV dataoffset
433 SV * callback 1167 SV * callback
434 ALIAS: 1168 ALIAS:
435 aio_read = REQ_READ 1169 aio_read = REQ_READ
436 aio_write = REQ_WRITE 1170 aio_write = REQ_WRITE
437 PROTOTYPE: $$$$$;$ 1171 PROTOTYPE: $$$$$;$
438 CODE: 1172 PPCODE:
439{ 1173{
440 aio_req req; 1174 aio_req req;
441 STRLEN svlen; 1175 STRLEN svlen;
442 char *svptr = SvPV (data, svlen); 1176 char *svptr = SvPVbyte (data, svlen);
443 1177
444 SvUPGRADE (data, SVt_PV); 1178 SvUPGRADE (data, SVt_PV);
445 SvPOK_on (data); 1179 SvPOK_on (data);
446 1180
447 if (dataoffset < 0) 1181 if (dataoffset < 0)
… …
463 } 1197 }
464 1198
465 if (length < 0) 1199 if (length < 0)
466 croak ("length must not be negative"); 1200 croak ("length must not be negative");
467 1201
468 Newz (0, req, 1, aio_cb); 1202 {
1203 dREQ;
469 1204
470 if (!req)
471 croak ("out of memory during aio_req allocation");
472
473 req->type = ix; 1205 req->type = ix;
474 req->fh = newSVsv (fh); 1206 req->fh = newSVsv (fh);
475 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) 1207 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
476 : IoOFP (sv_2io (fh))); 1208 : IoOFP (sv_2io (fh)));
477 req->offset = offset; 1209 req->offset = offset;
1210 req->length = length;
1211 req->data = SvREFCNT_inc (data);
1212 req->dataptr = (char *)svptr + dataoffset;
1213
1214 if (!SvREADONLY (data))
1215 {
1216 SvREADONLY_on (data);
1217 req->data2ptr = (void *)data;
1218 }
1219
1220 REQ_SEND;
1221 }
1222}
1223
1224void
1225aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1226 SV * out_fh
1227 SV * in_fh
1228 UV in_offset
1229 UV length
1230 SV * callback
1231 PROTOTYPE: $$$$;$
1232 PPCODE:
1233{
1234 dREQ;
1235
1236 req->type = REQ_SENDFILE;
1237 req->fh = newSVsv (out_fh);
1238 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1239 req->fh2 = newSVsv (in_fh);
1240 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1241 req->offset = in_offset;
478 req->length = length; 1242 req->length = length;
479 req->data = SvREFCNT_inc (data);
480 req->dataptr = (char *)svptr + dataoffset;
481 req->callback = SvREFCNT_inc (callback);
482 1243
483 send_req (req); 1244 REQ_SEND;
484} 1245}
485 1246
486void 1247void
487aio_readahead(fh,offset,length,callback=&PL_sv_undef) 1248aio_readahead (fh,offset,length,callback=&PL_sv_undef)
488 SV * fh 1249 SV * fh
489 UV offset 1250 UV offset
490 IV length 1251 IV length
491 SV * callback 1252 SV * callback
492 PROTOTYPE: $$$;$ 1253 PROTOTYPE: $$$;$
493 CODE: 1254 PPCODE:
494{ 1255{
495 aio_req req; 1256 dREQ;
496
497 if (length < 0)
498 croak ("length must not be negative");
499
500 Newz (0, req, 1, aio_cb);
501
502 if (!req)
503 croak ("out of memory during aio_req allocation");
504 1257
505 req->type = REQ_READAHEAD; 1258 req->type = REQ_READAHEAD;
506 req->fh = newSVsv (fh); 1259 req->fh = newSVsv (fh);
507 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 1260 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
508 req->offset = offset; 1261 req->offset = offset;
509 req->length = length; 1262 req->length = length;
510 req->callback = SvREFCNT_inc (callback);
511 1263
512 send_req (req); 1264 REQ_SEND;
513} 1265}
514 1266
515void 1267void
516aio_stat(fh_or_path,callback=&PL_sv_undef) 1268aio_stat (fh_or_path,callback=&PL_sv_undef)
517 SV * fh_or_path 1269 SV * fh_or_path
518 SV * callback 1270 SV * callback
519 ALIAS: 1271 ALIAS:
520 aio_stat = REQ_STAT 1272 aio_stat = REQ_STAT
521 aio_lstat = REQ_LSTAT 1273 aio_lstat = REQ_LSTAT
522 CODE: 1274 PPCODE:
523{ 1275{
524 aio_req req; 1276 dREQ;
525
526 Newz (0, req, 1, aio_cb);
527
528 if (!req)
529 croak ("out of memory during aio_req allocation");
530 1277
531 New (0, req->statdata, 1, Stat_t); 1278 New (0, req->statdata, 1, Stat_t);
532
533 if (!req->statdata) 1279 if (!req->statdata)
1280 {
1281 req_free (req);
534 croak ("out of memory during aio_req->statdata allocation"); 1282 croak ("out of memory during aio_req->statdata allocation");
1283 }
535 1284
536 if (SvPOK (fh_or_path)) 1285 if (SvPOK (fh_or_path))
537 { 1286 {
538 req->type = ix; 1287 req->type = ix;
539 req->data = newSVsv (fh_or_path); 1288 req->data = newSVsv (fh_or_path);
540 req->dataptr = SvPV_nolen (req->data); 1289 req->dataptr = SvPVbyte_nolen (req->data);
541 } 1290 }
542 else 1291 else
543 { 1292 {
544 req->type = REQ_FSTAT; 1293 req->type = REQ_FSTAT;
545 req->fh = newSVsv (fh_or_path); 1294 req->fh = newSVsv (fh_or_path);
546 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1295 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
547 } 1296 }
548 1297
549 req->callback = SvREFCNT_inc (callback); 1298 REQ_SEND;
550
551 send_req (req);
552} 1299}
553 1300
554void 1301void
555aio_unlink(pathname,callback=&PL_sv_undef) 1302aio_unlink (pathname,callback=&PL_sv_undef)
556 SV * pathname 1303 SV * pathname
557 SV * callback 1304 SV * callback
1305 ALIAS:
1306 aio_unlink = REQ_UNLINK
1307 aio_rmdir = REQ_RMDIR
1308 aio_readdir = REQ_READDIR
558 CODE: 1309 PPCODE:
559{ 1310{
560 aio_req req; 1311 dREQ;
561 1312
562 Newz (0, req, 1, aio_cb); 1313 req->type = ix;
1314 req->data = newSVsv (pathname);
1315 req->dataptr = SvPVbyte_nolen (req->data);
563 1316
564 if (!req) 1317 REQ_SEND;
565 croak ("out of memory during aio_req allocation"); 1318}
1319
1320void
1321aio_link (oldpath,newpath,callback=&PL_sv_undef)
1322 SV * oldpath
1323 SV * newpath
1324 SV * callback
1325 ALIAS:
1326 aio_link = REQ_LINK
1327 aio_symlink = REQ_SYMLINK
1328 aio_rename = REQ_RENAME
1329 PPCODE:
1330{
1331 dREQ;
566 1332
567 req->type = REQ_UNLINK; 1333 req->type = ix;
1334 req->fh = newSVsv (oldpath);
1335 req->data2ptr = SvPVbyte_nolen (req->fh);
568 req->data = newSVsv (pathname); 1336 req->data = newSVsv (newpath);
569 req->dataptr = SvPV_nolen (req->data); 1337 req->dataptr = SvPVbyte_nolen (req->data);
570 req->callback = SvREFCNT_inc (callback);
571 1338
572 send_req (req); 1339 REQ_SEND;
573} 1340}
574 1341
575void 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
576flush() 1399flush ()
577 PROTOTYPE: 1400 PROTOTYPE:
578 CODE: 1401 CODE:
579 while (nreqs) 1402 while (nreqs)
580 { 1403 {
581 poll_wait (); 1404 poll_wait ();
… …
621 CODE: 1444 CODE:
622 RETVAL = nreqs; 1445 RETVAL = nreqs;
623 OUTPUT: 1446 OUTPUT:
624 RETVAL 1447 RETVAL
625 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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