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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.5 by root, Sun Jul 10 23:45:16 2005 UTC vs.
Revision 1.75 by root, Thu Oct 26 06:44:48 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
1#include "EXTERN.h" 12#include "EXTERN.h"
2#include "perl.h" 13#include "perl.h"
3#include "XSUB.h" 14#include "XSUB.h"
4 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>
5#include <sys/types.h> 24#include <sys/types.h>
6#include <sys/stat.h> 25#include <sys/stat.h>
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>
11#include <endian.h>
12 31
13#include <pthread.h> 32#if HAVE_SENDFILE
33# if __linux
34# include <sys/sendfile.h>
35# elif __freebsd
14#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
44# endif
45#endif
15 46
16typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 47/* used for struct dirent, AIX doesn't provide it */
17typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 48#ifndef NAME_MAX
18typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49# define NAME_MAX 4096
50#endif
51
52#ifndef PTHREAD_STACK_MIN
53/* care for broken platforms, e.g. windows */
54# define PTHREAD_STACK_MIN 16384
55#endif
19 56
20#if __ia64 57#if __ia64
21# define STACKSIZE 65536 58# define STACKSIZE 65536
59#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
60# define STACKSIZE PTHREAD_STACK_MIN
22#else 61#else
23# define STACKSIZE 4096 62# define STACKSIZE 16384
24#endif 63#endif
64
65/* buffer size for various temporary buffers */
66#define AIO_BUFSIZE 65536
67
68#define dBUF \
69 char *aio_buf; \
70 LOCK (wrklock); \
71 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
72 UNLOCK (wrklock); \
73 if (!aio_buf) \
74 return -1;
25 75
26enum { 76enum {
27 REQ_QUIT, 77 REQ_QUIT,
28 REQ_OPEN, REQ_CLOSE, 78 REQ_OPEN, REQ_CLOSE,
29 REQ_READ, REQ_WRITE, REQ_READAHEAD, 79 REQ_READ, REQ_WRITE, REQ_READAHEAD,
80 REQ_SENDFILE,
30 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 81 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
31 REQ_FSYNC, REQ_FDATASYNC, 82 REQ_FSYNC, REQ_FDATASYNC,
83 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
84 REQ_READDIR,
85 REQ_LINK, REQ_SYMLINK,
86 REQ_GROUP, REQ_NOP,
87 REQ_BUSY,
32}; 88};
33 89
90#define AIO_REQ_KLASS "IO::AIO::REQ"
91#define AIO_GRP_KLASS "IO::AIO::GRP"
92
34typedef struct aio_cb { 93typedef struct aio_cb
94{
35 struct aio_cb *volatile next; 95 struct aio_cb *volatile next;
36 96
37 int type; 97 SV *data, *callback;
38 98 SV *fh, *fh2;
39 int fd; 99 void *dataptr, *data2ptr;
100 Stat_t *statdata;
40 off_t offset; 101 off_t offset;
41 size_t length; 102 size_t length;
42 ssize_t result; 103 ssize_t result;
104
105 STRLEN dataoffset;
106 int type;
107 int fd, fd2;
108 int errorno;
43 mode_t mode; /* open */ 109 mode_t mode; /* open */
44 int errorno;
45 SV *data, *callback;
46 void *dataptr;
47 STRLEN dataoffset;
48 110
49 Stat_t *statdata; 111 unsigned char flags;
112 unsigned char pri;
113
114 SV *self; /* the perl counterpart of this request, if any */
115 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
50} aio_cb; 116} aio_cb;
51 117
118enum {
119 FLAG_CANCELLED = 0x01,
120};
121
52typedef aio_cb *aio_req; 122typedef aio_cb *aio_req;
123typedef aio_cb *aio_req_ornot;
53 124
125enum {
126 PRI_MIN = -4,
127 PRI_MAX = 4,
128
129 DEFAULT_PRI = 0,
130 PRI_BIAS = -PRI_MIN,
131 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
132};
133
134static int next_pri = DEFAULT_PRI + PRI_BIAS;
135
54static int started; 136static int started, wanted;
55static int nreqs; 137static volatile int nreqs;
56static int max_outstanding = 1<<30;
57static int respipe [2]; 138static int respipe [2];
58 139
140#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
141# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
142#else
143# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
144#endif
145
146#define LOCK(mutex) pthread_mutex_lock (&(mutex))
147#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
148
149/* worker threasd management */
150static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
151
152typedef struct worker {
153 /* locked by wrklock */
154 struct worker *prev, *next;
155
156 pthread_t tid;
157
158 /* locked by reslock, reqlock or wrklock */
159 aio_req req; /* currently processed request */
160 void *dbuf;
161 DIR *dirp;
162} worker;
163
164static worker wrk_first = { &wrk_first, &wrk_first, 0 };
165
166static void worker_clear (worker *wrk)
167{
168 if (wrk->dirp)
169 {
170 closedir (wrk->dirp);
171 wrk->dirp = 0;
172 }
173
174 if (wrk->dbuf)
175 {
176 free (wrk->dbuf);
177 wrk->dbuf = 0;
178 }
179}
180
181static void worker_free (worker *wrk)
182{
183 wrk->next->prev = wrk->prev;
184 wrk->prev->next = wrk->next;
185
186 free (wrk);
187}
188
59static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 189static pthread_mutex_t reslock = AIO_MUTEX_INIT;
60static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 190static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
61static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 191static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62 192
63static volatile aio_req reqs, reqe; /* queue start, queue end */ 193/*
64static volatile aio_req ress, rese; /* queue start, queue end */ 194 * a somewhat faster data structure might be nice, but
195 * with 8 priorities this actually needs <20 insns
196 * per shift, the most expensive operation.
197 */
198typedef struct {
199 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
200 int size;
201} reqq;
65 202
66static void 203static reqq req_queue;
67poll_wait () 204static reqq res_queue;
205
206int reqq_push (reqq *q, aio_req req)
68{ 207{
208 int pri = req->pri;
209 req->next = 0;
210
211 if (q->qe[pri])
212 {
213 q->qe[pri]->next = req;
214 q->qe[pri] = req;
215 }
216 else
217 q->qe[pri] = q->qs[pri] = req;
218
219 return q->size++;
220}
221
222aio_req reqq_shift (reqq *q)
223{
224 int pri;
225
226 if (!q->size)
227 return 0;
228
229 --q->size;
230
231 for (pri = NUM_PRI; pri--; )
232 {
233 aio_req req = q->qs[pri];
234
235 if (req)
236 {
237 if (!(q->qs[pri] = req->next))
238 q->qe[pri] = 0;
239
240 return req;
241 }
242 }
243
244 abort ();
245}
246
247static int poll_cb ();
248static void req_invoke (aio_req req);
249static void req_free (aio_req req);
250static void req_cancel (aio_req req);
251
252/* must be called at most once */
253static SV *req_sv (aio_req req, const char *klass)
254{
69 if (!nreqs) 255 if (!req->self)
256 {
257 req->self = (SV *)newHV ();
258 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
259 }
260
261 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
262}
263
264static aio_req SvAIO_REQ (SV *sv)
265{
266 MAGIC *mg;
267
268 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
269 croak ("object of class " AIO_REQ_KLASS " expected");
270
271 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
272
273 return mg ? (aio_req)mg->mg_ptr : 0;
274}
275
276static void aio_grp_feed (aio_req grp)
277{
278 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
279 {
280 int old_len = grp->length;
281
282 if (grp->fh2 && SvOK (grp->fh2))
283 {
284 dSP;
285
286 ENTER;
287 SAVETMPS;
288 PUSHMARK (SP);
289 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
290 PUTBACK;
291 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
292 SPAGAIN;
293 FREETMPS;
294 LEAVE;
295 }
296
297 /* stop if no progress has been made */
298 if (old_len == grp->length)
299 {
300 SvREFCNT_dec (grp->fh2);
301 grp->fh2 = 0;
302 break;
303 }
304 }
305}
306
307static void aio_grp_dec (aio_req grp)
308{
309 --grp->length;
310
311 /* call feeder, if applicable */
312 aio_grp_feed (grp);
313
314 /* finish, if done */
315 if (!grp->length && grp->fd)
316 {
317 req_invoke (grp);
318 req_free (grp);
319 }
320}
321
322static void poll_wait ()
323{
324 fd_set rfd;
325
326 while (nreqs)
327 {
328 int size;
329#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
330 LOCK (reslock);
331#endif
332 size = res_queue.size;
333#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
334 UNLOCK (reslock);
335#endif
336
337 if (size)
338 return;
339
340 FD_ZERO(&rfd);
341 FD_SET(respipe [0], &rfd);
342
343 select (respipe [0] + 1, &rfd, 0, 0, 0);
344 }
345}
346
347static void req_invoke (aio_req req)
348{
349 dSP;
350
351 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
352 {
353 errno = req->errorno;
354
355 ENTER;
356 SAVETMPS;
357 PUSHMARK (SP);
358 EXTEND (SP, 1);
359
360 switch (req->type)
361 {
362 case REQ_READDIR:
363 {
364 SV *rv = &PL_sv_undef;
365
366 if (req->result >= 0)
367 {
368 int i;
369 char *buf = req->data2ptr;
370 AV *av = newAV ();
371
372 av_extend (av, req->result - 1);
373
374 for (i = 0; i < req->result; ++i)
375 {
376 SV *sv = newSVpv (buf, 0);
377
378 av_store (av, i, sv);
379 buf += SvCUR (sv) + 1;
380 }
381
382 rv = sv_2mortal (newRV_noinc ((SV *)av));
383 }
384
385 PUSHs (rv);
386 }
387 break;
388
389 case REQ_OPEN:
390 {
391 /* convert fd to fh */
392 SV *fh;
393
394 PUSHs (sv_2mortal (newSViv (req->result)));
395 PUTBACK;
396 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
397 SPAGAIN;
398
399 fh = SvREFCNT_inc (POPs);
400
401 PUSHMARK (SP);
402 XPUSHs (sv_2mortal (fh));
403 }
404 break;
405
406 case REQ_GROUP:
407 req->fd = 2; /* mark group as finished */
408
409 if (req->data)
410 {
411 int i;
412 AV *av = (AV *)req->data;
413
414 EXTEND (SP, AvFILL (av) + 1);
415 for (i = 0; i <= AvFILL (av); ++i)
416 PUSHs (*av_fetch (av, i, 0));
417 }
418 break;
419
420 case REQ_NOP:
421 case REQ_BUSY:
422 break;
423
424 default:
425 PUSHs (sv_2mortal (newSViv (req->result)));
426 break;
427 }
428
429
430 PUTBACK;
431 call_sv (req->callback, G_VOID | G_EVAL);
432 SPAGAIN;
433
434 FREETMPS;
435 LEAVE;
436 }
437
438 if (req->grp)
439 {
440 aio_req grp = req->grp;
441
442 /* unlink request */
443 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
444 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
445
446 if (grp->grp_first == req)
447 grp->grp_first = req->grp_next;
448
449 aio_grp_dec (grp);
450 }
451
452 if (SvTRUE (ERRSV))
453 {
454 req_free (req);
455 croak (0);
456 }
457}
458
459static void req_free (aio_req req)
460{
461 if (req->self)
462 {
463 sv_unmagic (req->self, PERL_MAGIC_ext);
464 SvREFCNT_dec (req->self);
465 }
466
467 SvREFCNT_dec (req->data);
468 SvREFCNT_dec (req->fh);
469 SvREFCNT_dec (req->fh2);
470 SvREFCNT_dec (req->callback);
471 Safefree (req->statdata);
472
473 if (req->type == REQ_READDIR)
474 free (req->data2ptr);
475
476 Safefree (req);
477}
478
479static void req_cancel_subs (aio_req grp)
480{
481 aio_req sub;
482
483 if (grp->type != REQ_GROUP)
70 return; 484 return;
71 485
72 fd_set rfd; 486 SvREFCNT_dec (grp->fh2);
73 FD_ZERO(&rfd); 487 grp->fh2 = 0;
74 FD_SET(respipe [0], &rfd);
75 488
76 select (respipe [0] + 1, &rfd, 0, 0, 0); 489 for (sub = grp->grp_first; sub; sub = sub->grp_next)
490 req_cancel (sub);
77} 491}
78 492
79static int 493static void req_cancel (aio_req req)
80poll_cb () 494{
495 req->flags |= FLAG_CANCELLED;
496
497 req_cancel_subs (req);
498}
499
500static int poll_cb ()
81{ 501{
82 dSP; 502 dSP;
83 int count = 0; 503 int count = 0;
504 int do_croak = 0;
84 aio_req req; 505 aio_req req;
85
86 {
87 /* read and signals sent by the worker threads */
88 char buf [32];
89 while (read (respipe [0], buf, 32) > 0)
90 ;
91 }
92 506
93 for (;;) 507 for (;;)
94 { 508 {
95 pthread_mutex_lock (&reslock); 509 LOCK (reslock);
510 req = reqq_shift (&res_queue);
96 511
97 req = ress;
98
99 if (ress) 512 if (req)
100 { 513 {
101 ress = ress->next; 514 if (!res_queue.size)
102 if (!ress) rese = 0; 515 {
516 /* read any signals sent by the worker threads */
517 char buf [32];
518 while (read (respipe [0], buf, 32) == 32)
519 ;
520 }
103 } 521 }
104 522
105 pthread_mutex_unlock (&reslock); 523 UNLOCK (reslock);
106 524
107 if (!req) 525 if (!req)
108 break; 526 break;
109 527
110 nreqs--; 528 --nreqs;
111 529
112 if (req->type == REQ_QUIT) 530 if (req->type == REQ_QUIT)
113 started--; 531 started--;
532 else if (req->type == REQ_GROUP && req->length)
533 {
534 req->fd = 1; /* mark request as delayed */
535 continue;
536 }
114 else 537 else
115 { 538 {
116 int errorno = errno;
117 errno = req->errorno;
118
119 if (req->type == REQ_READ) 539 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset 540 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121 + req->result > 0 ? req->result : 0);
122 541
542 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
543 SvREADONLY_off (req->data);
544
123 if (req->data) 545 if (req->statdata)
124 SvREFCNT_dec (req->data);
125
126 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127 { 546 {
128 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 547 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129 PL_laststatval = req->result; 548 PL_laststatval = req->result;
130 PL_statcache = *(req->statdata); 549 PL_statcache = *(req->statdata);
131
132 Safefree (req->statdata);
133 } 550 }
134 551
135 PUSHMARK (SP); 552 req_invoke (req);
136 XPUSHs (sv_2mortal (newSViv (req->result)));
137 553
138 if (req->type == REQ_OPEN)
139 {
140 /* convert fd to fh */
141 SV *fh;
142
143 PUTBACK;
144 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
145 SPAGAIN;
146
147 fh = POPs;
148
149 PUSHMARK (SP);
150 XPUSHs (fh);
151 }
152
153 PUTBACK;
154 call_sv (req->callback, G_VOID | G_EVAL);
155 SPAGAIN;
156
157 if (req->callback)
158 SvREFCNT_dec (req->callback);
159
160 errno = errorno;
161 count++; 554 count++;
162 } 555 }
163 556
164 Safefree (req); 557 req_free (req);
165 } 558 }
166 559
167 return count; 560 return count;
168} 561}
169 562
170static void *aio_proc(void *arg); 563static void *aio_proc(void *arg);
171 564
172static void
173start_thread (void) 565static void start_thread (void)
174{ 566{
175 sigset_t fullsigset, oldsigset; 567 sigset_t fullsigset, oldsigset;
176 pthread_t tid;
177 pthread_attr_t attr; 568 pthread_attr_t attr;
569
570 worker *wrk = calloc (1, sizeof (worker));
571
572 if (!wrk)
573 croak ("unable to allocate worker thread data");
178 574
179 pthread_attr_init (&attr); 575 pthread_attr_init (&attr);
180 pthread_attr_setstacksize (&attr, STACKSIZE); 576 pthread_attr_setstacksize (&attr, STACKSIZE);
181 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 577 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
182 578
183 sigfillset (&fullsigset); 579 sigfillset (&fullsigset);
580
581 LOCK (wrklock);
184 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 582 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
185 583
186 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 584 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
585 {
586 wrk->prev = &wrk_first;
587 wrk->next = wrk_first.next;
588 wrk_first.next->prev = wrk;
589 wrk_first.next = wrk;
187 started++; 590 started++;
591 }
592 else
593 free (wrk);
188 594
189 sigprocmask (SIG_SETMASK, &oldsigset, 0); 595 sigprocmask (SIG_SETMASK, &oldsigset, 0);
596 UNLOCK (wrklock);
190} 597}
191 598
192static void 599static void req_send (aio_req req)
193send_req (aio_req req)
194{ 600{
601 while (started < wanted && nreqs >= started)
602 start_thread ();
603
195 nreqs++; 604 ++nreqs;
196 605
197 pthread_mutex_lock (&reqlock); 606 LOCK (reqlock);
198 607 reqq_push (&req_queue, req);
199 req->next = 0;
200
201 if (reqe)
202 {
203 reqe->next = req;
204 reqe = req;
205 }
206 else
207 reqe = reqs = req;
208
209 pthread_cond_signal (&reqwait); 608 pthread_cond_signal (&reqwait);
210 pthread_mutex_unlock (&reqlock); 609 UNLOCK (reqlock);
610}
211 611
212 while (nreqs > max_outstanding) 612static void end_thread (void)
613{
614 aio_req req;
615
616 Newz (0, req, 1, aio_cb);
617
618 req->type = REQ_QUIT;
619 req->pri = PRI_MAX + PRI_BIAS;
620
621 req_send (req);
622}
623
624static void min_parallel (int nthreads)
625{
626 if (wanted < nthreads)
627 wanted = nthreads;
628}
629
630static void max_parallel (int nthreads)
631{
632 int cur = started;
633
634 if (wanted > nthreads)
635 wanted = nthreads;
636
637 while (cur > wanted)
638 {
639 end_thread ();
640 cur--;
641 }
642
643 while (started > wanted)
213 { 644 {
214 poll_wait (); 645 poll_wait ();
215 poll_cb (); 646 poll_cb ();
216 } 647 }
217} 648}
218 649
219static void 650static void create_pipe ()
220end_thread (void)
221{ 651{
222 aio_req req; 652 if (pipe (respipe))
223 New (0, req, 1, aio_cb); 653 croak ("unable to initialize result pipe");
224 req->type = REQ_QUIT;
225 654
226 send_req (req); 655 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
227} 656 croak ("cannot set result pipe to nonblocking mode");
228 657
229static void 658 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
230read_write (int dowrite, int fd, off_t offset, size_t length, 659 croak ("cannot set result pipe to nonblocking mode");
231 SV *data, STRLEN dataoffset, SV *callback) 660}
232{
233 aio_req req;
234 STRLEN svlen;
235 char *svptr = SvPV (data, svlen);
236 661
237 SvUPGRADE (data, SVt_PV); 662/*****************************************************************************/
238 SvPOK_on (data); 663/* work around various missing functions */
239 664
240 if (dataoffset < 0) 665#if !HAVE_PREADWRITE
666# define pread aio_pread
667# define pwrite aio_pwrite
668
669/*
670 * make our pread/pwrite safe against themselves, but not against
671 * normal read/write by using a mutex. slows down execution a lot,
672 * but that's your problem, not mine.
673 */
674static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
675
676static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
677{
678 ssize_t res;
679 off_t ooffset;
680
681 LOCK (preadwritelock);
682 ooffset = lseek (fd, 0, SEEK_CUR);
683 lseek (fd, offset, SEEK_SET);
684 res = read (fd, buf, count);
685 lseek (fd, ooffset, SEEK_SET);
686 UNLOCK (preadwritelock);
687
688 return res;
689}
690
691static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
692{
693 ssize_t res;
694 off_t ooffset;
695
696 LOCK (preadwritelock);
697 ooffset = lseek (fd, 0, SEEK_CUR);
698 lseek (fd, offset, SEEK_SET);
699 res = write (fd, buf, count);
700 lseek (fd, offset, SEEK_SET);
701 UNLOCK (preadwritelock);
702
703 return res;
704}
705#endif
706
707#if !HAVE_FDATASYNC
708# define fdatasync fsync
709#endif
710
711#if !HAVE_READAHEAD
712# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
713
714static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
715{
716 dBUF;
717
718 while (count > 0)
719 {
720 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
721
722 pread (fd, aio_buf, len, offset);
241 dataoffset += svlen; 723 offset += len;
242 724 count -= len;
243 if (dataoffset < 0 || dataoffset > svlen)
244 croak ("data offset outside of string");
245
246 if (dowrite)
247 { 725 }
248 /* write: check length and adjust. */ 726
249 if (length < 0 || length + dataoffset > svlen) 727 errno = 0;
250 length = svlen - dataoffset; 728}
729
730#endif
731
732#if !HAVE_READDIR_R
733# define readdir_r aio_readdir_r
734
735static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
736
737static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
738{
739 struct dirent *e;
740 int errorno;
741
742 LOCK (readdirlock);
743
744 e = readdir (dirp);
745 errorno = errno;
746
747 if (e)
748 {
749 *res = ent;
750 strcpy (ent->d_name, e->d_name);
251 } 751 }
252 else 752 else
753 *res = 0;
754
755 UNLOCK (readdirlock);
756
757 errno = errorno;
758 return e ? 0 : -1;
759}
760#endif
761
762/* sendfile always needs emulation */
763static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
764{
765 ssize_t res;
766
767 if (!count)
768 return 0;
769
770#if HAVE_SENDFILE
771# if __linux
772 res = sendfile (ofd, ifd, &offset, count);
773
774# elif __freebsd
775 /*
776 * Of course, the freebsd sendfile is a dire hack with no thoughts
777 * wasted on making it similar to other I/O functions.
778 */
779 {
780 off_t sbytes;
781 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
782
783 if (res < 0 && sbytes)
784 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
785 res = sbytes;
786 }
787
788# elif __hpux
789 res = sendfile (ofd, ifd, offset, count, 0, 0);
790
791# elif __solaris
792 {
793 struct sendfilevec vec;
794 size_t sbytes;
795
796 vec.sfv_fd = ifd;
797 vec.sfv_flag = 0;
798 vec.sfv_off = offset;
799 vec.sfv_len = count;
800
801 res = sendfilev (ofd, &vec, 1, &sbytes);
802
803 if (res < 0 && sbytes)
804 res = sbytes;
805 }
806
807# endif
808#else
809 res = -1;
810 errno = ENOSYS;
811#endif
812
813 if (res < 0
814 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
815#if __solaris
816 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
817#endif
818 )
819 )
820 {
821 /* emulate sendfile. this is a major pain in the ass */
822 dBUF;
823
824 res = 0;
825
826 while (count)
827 {
828 ssize_t cnt;
829
830 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
831
832 if (cnt <= 0)
833 {
834 if (cnt && !res) res = -1;
835 break;
836 }
837
838 cnt = write (ofd, aio_buf, cnt);
839
840 if (cnt <= 0)
841 {
842 if (cnt && !res) res = -1;
843 break;
844 }
845
846 offset += cnt;
847 res += cnt;
848 count -= cnt;
849 }
850 }
851
852 return res;
853}
854
855/* read a full directory */
856static void scandir_ (aio_req req, worker *self)
857{
858 DIR *dirp;
859 union
860 {
861 struct dirent d;
862 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
863 } *u;
864 struct dirent *entp;
865 char *name, *names;
866 int memlen = 4096;
867 int memofs = 0;
868 int res = 0;
869 int errorno;
870
871 LOCK (wrklock);
872 self->dirp = dirp = opendir (req->dataptr);
873 self->dbuf = u = malloc (sizeof (*u));
874 UNLOCK (wrklock);
875
876 req->data2ptr = names = malloc (memlen);
877
878 if (dirp && u && names)
879 for (;;)
253 { 880 {
254 /* read: grow scalar as necessary */ 881 errno = 0;
255 svptr = SvGROW (data, length + dataoffset); 882 readdir_r (dirp, &u->d, &entp);
883
884 if (!entp)
885 break;
886
887 name = entp->d_name;
888
889 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
890 {
891 int len = strlen (name) + 1;
892
893 res++;
894
895 while (memofs + len > memlen)
896 {
897 memlen *= 2;
898 LOCK (wrklock);
899 req->data2ptr = names = realloc (names, memlen);
900 UNLOCK (wrklock);
901
902 if (!names)
903 break;
904 }
905
906 memcpy (names + memofs, name, len);
907 memofs += len;
908 }
256 } 909 }
257 910
258 if (length < 0) 911 if (errno)
259 croak ("length must not be negative"); 912 res = -1;
260 913
261 Newz (0, req, 1, aio_cb); 914 req->result = res;
262
263 if (!req)
264 croak ("out of memory during aio_req allocation");
265
266 req->type = dowrite ? REQ_WRITE : REQ_READ;
267 req->fd = fd;
268 req->offset = offset;
269 req->length = length;
270 req->data = SvREFCNT_inc (data);
271 req->dataptr = (char *)svptr + dataoffset;
272 req->callback = SvREFCNT_inc (callback);
273
274 send_req (req);
275} 915}
276 916
277static void * 917/*****************************************************************************/
918
278aio_proc (void *thr_arg) 919static void *aio_proc (void *thr_arg)
279{ 920{
280 aio_req req; 921 aio_req req;
281 int type; 922 int type;
923 worker *self = (worker *)thr_arg;
282 924
283 do 925 do
284 { 926 {
285 pthread_mutex_lock (&reqlock); 927 LOCK (reqlock);
286 928
287 for (;;) 929 for (;;)
288 { 930 {
289 req = reqs; 931 self->req = req = reqq_shift (&req_queue);
290
291 if (reqs)
292 {
293 reqs = reqs->next;
294 if (!reqs) reqe = 0;
295 }
296 932
297 if (req) 933 if (req)
298 break; 934 break;
299 935
300 pthread_cond_wait (&reqwait, &reqlock); 936 pthread_cond_wait (&reqwait, &reqlock);
301 } 937 }
302 938
303 pthread_mutex_unlock (&reqlock); 939 UNLOCK (reqlock);
304 940
305 errno = 0; /* strictly unnecessary */ 941 errno = 0; /* strictly unnecessary */
942 type = req->type; /* remember type for QUIT check */
306 943
307 type = req->type; 944 if (!(req->flags & FLAG_CANCELLED))
308
309 switch (type) 945 switch (type)
310 { 946 {
311 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 947 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
312 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 948 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
313#if SYS_readahead 949
314 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 950 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
315#else 951 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
316 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
317#endif
318 952
319 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 953 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
320 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 954 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
321 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 955 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
322 956
323 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 957 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
324 case REQ_CLOSE: req->result = close (req->fd); break; 958 case REQ_CLOSE: req->result = close (req->fd); break;
325 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 959 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
326
327 case REQ_FSYNC: req->result = fsync (req->fd); break; 960 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
961 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
962 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
963 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
964
328 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 965 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
966 case REQ_FSYNC: req->result = fsync (req->fd); break;
967 case REQ_READDIR: scandir_ (req, self); break;
329 968
969 case REQ_BUSY:
970 {
971 struct timeval tv;
972
973 tv.tv_sec = req->fd;
974 tv.tv_usec = req->fd2;
975
976 req->result = select (0, 0, 0, 0, &tv);
977 }
978
979 case REQ_GROUP:
980 case REQ_NOP:
330 case REQ_QUIT: 981 case REQ_QUIT:
331 break; 982 break;
332 983
333 default: 984 default:
334 req->result = ENOSYS; 985 req->result = ENOSYS;
335 break; 986 break;
336 } 987 }
337 988
338 req->errorno = errno; 989 req->errorno = errno;
339 990
340 pthread_mutex_lock (&reslock); 991 LOCK (reslock);
341 992
342 req->next = 0; 993 if (!reqq_push (&res_queue, req))
343
344 if (rese)
345 {
346 rese->next = req;
347 rese = req;
348 }
349 else
350 {
351 rese = ress = req;
352
353 /* write a dummy byte to the pipe so fh becomes ready */ 994 /* write a dummy byte to the pipe so fh becomes ready */
354 write (respipe [1], &respipe, 1); 995 write (respipe [1], &respipe, 1);
355 }
356 996
357 pthread_mutex_unlock (&reslock); 997 self->req = 0;
998 worker_clear (self);
999
1000 UNLOCK (reslock);
358 } 1001 }
359 while (type != REQ_QUIT); 1002 while (type != REQ_QUIT);
360 1003
1004 LOCK (wrklock);
1005 worker_free (self);
1006 UNLOCK (wrklock);
1007
361 return 0; 1008 return 0;
362} 1009}
363 1010
1011/*****************************************************************************/
1012
1013static void atfork_prepare (void)
1014{
1015 LOCK (wrklock);
1016 LOCK (reqlock);
1017 LOCK (reslock);
1018#if !HAVE_PREADWRITE
1019 LOCK (preadwritelock);
1020#endif
1021#if !HAVE_READDIR_R
1022 LOCK (readdirlock);
1023#endif
1024}
1025
1026static void atfork_parent (void)
1027{
1028#if !HAVE_READDIR_R
1029 UNLOCK (readdirlock);
1030#endif
1031#if !HAVE_PREADWRITE
1032 UNLOCK (preadwritelock);
1033#endif
1034 UNLOCK (reslock);
1035 UNLOCK (reqlock);
1036 UNLOCK (wrklock);
1037}
1038
1039static void atfork_child (void)
1040{
1041 aio_req prv;
1042
1043 while (prv = reqq_shift (&req_queue))
1044 req_free (prv);
1045
1046 while (prv = reqq_shift (&res_queue))
1047 req_free (prv);
1048
1049 while (wrk_first.next != &wrk_first)
1050 {
1051 worker *wrk = wrk_first.next;
1052
1053 if (wrk->req)
1054 req_free (wrk->req);
1055
1056 worker_clear (wrk);
1057 worker_free (wrk);
1058 }
1059
1060 started = 0;
1061 nreqs = 0;
1062
1063 close (respipe [0]);
1064 close (respipe [1]);
1065 create_pipe ();
1066
1067 atfork_parent ();
1068}
1069
1070#define dREQ \
1071 aio_req req; \
1072 int req_pri = next_pri; \
1073 next_pri = DEFAULT_PRI + PRI_BIAS; \
1074 \
1075 if (SvOK (callback) && !SvROK (callback)) \
1076 croak ("callback must be undef or of reference type"); \
1077 \
1078 Newz (0, req, 1, aio_cb); \
1079 if (!req) \
1080 croak ("out of memory during aio_req allocation"); \
1081 \
1082 req->callback = newSVsv (callback); \
1083 req->pri = req_pri
1084
1085#define REQ_SEND \
1086 req_send (req); \
1087 \
1088 if (GIMME_V != G_VOID) \
1089 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1090
364MODULE = IO::AIO PACKAGE = IO::AIO 1091MODULE = IO::AIO PACKAGE = IO::AIO
365 1092
1093PROTOTYPES: ENABLE
1094
366BOOT: 1095BOOT:
367{ 1096{
368 if (pipe (respipe)) 1097 HV *stash = gv_stashpv ("IO::AIO", 1);
369 croak ("unable to initialize result pipe"); 1098 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1099 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1100 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
370 1101
371 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1102 create_pipe ();
372 croak ("cannot set result pipe to nonblocking mode"); 1103 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
373
374 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
375 croak ("cannot set result pipe to nonblocking mode");
376} 1104}
377 1105
378void 1106void
379min_parallel(nthreads) 1107min_parallel (nthreads)
380 int nthreads 1108 int nthreads
381 PROTOTYPE: $ 1109 PROTOTYPE: $
382 CODE:
383 while (nthreads > started)
384 start_thread ();
385 1110
386void 1111void
387max_parallel(nthreads) 1112max_parallel (nthreads)
388 int nthreads 1113 int nthreads
389 PROTOTYPE: $ 1114 PROTOTYPE: $
1115
1116void
1117aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1118 SV * pathname
1119 int flags
1120 int mode
1121 SV * callback
1122 PROTOTYPE: $$$;$
1123 PPCODE:
1124{
1125 dREQ;
1126
1127 req->type = REQ_OPEN;
1128 req->data = newSVsv (pathname);
1129 req->dataptr = SvPVbyte_nolen (req->data);
1130 req->fd = flags;
1131 req->mode = mode;
1132
1133 REQ_SEND;
1134}
1135
1136void
1137aio_close (fh,callback=&PL_sv_undef)
1138 SV * fh
1139 SV * callback
1140 PROTOTYPE: $;$
1141 ALIAS:
1142 aio_close = REQ_CLOSE
1143 aio_fsync = REQ_FSYNC
1144 aio_fdatasync = REQ_FDATASYNC
1145 PPCODE:
1146{
1147 dREQ;
1148
1149 req->type = ix;
1150 req->fh = newSVsv (fh);
1151 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1152
1153 REQ_SEND (req);
1154}
1155
1156void
1157aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1158 SV * fh
1159 UV offset
1160 UV length
1161 SV * data
1162 UV dataoffset
1163 SV * callback
1164 ALIAS:
1165 aio_read = REQ_READ
1166 aio_write = REQ_WRITE
1167 PROTOTYPE: $$$$$;$
390 CODE: 1168 PPCODE:
391{ 1169{
392 int cur = started; 1170 aio_req req;
393 while (cur > nthreads) 1171 STRLEN svlen;
394 { 1172 char *svptr = SvPVbyte (data, svlen);
395 end_thread (); 1173
396 cur--; 1174 SvUPGRADE (data, SVt_PV);
1175 SvPOK_on (data);
1176
1177 if (dataoffset < 0)
1178 dataoffset += svlen;
1179
1180 if (dataoffset < 0 || dataoffset > svlen)
1181 croak ("data offset outside of string");
1182
1183 if (ix == REQ_WRITE)
1184 {
1185 /* write: check length and adjust. */
1186 if (length < 0 || length + dataoffset > svlen)
1187 length = svlen - dataoffset;
397 } 1188 }
1189 else
1190 {
1191 /* read: grow scalar as necessary */
1192 svptr = SvGROW (data, length + dataoffset);
1193 }
398 1194
399 while (started > nthreads) 1195 if (length < 0)
1196 croak ("length must not be negative");
1197
1198 {
1199 dREQ;
1200
1201 req->type = ix;
1202 req->fh = newSVsv (fh);
1203 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1204 : IoOFP (sv_2io (fh)));
1205 req->offset = offset;
1206 req->length = length;
1207 req->data = SvREFCNT_inc (data);
1208 req->dataptr = (char *)svptr + dataoffset;
1209
1210 if (!SvREADONLY (data))
1211 {
1212 SvREADONLY_on (data);
1213 req->data2ptr = (void *)data;
1214 }
1215
1216 REQ_SEND;
1217 }
1218}
1219
1220void
1221aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1222 SV * out_fh
1223 SV * in_fh
1224 UV in_offset
1225 UV length
1226 SV * callback
1227 PROTOTYPE: $$$$;$
1228 PPCODE:
1229{
1230 dREQ;
1231
1232 req->type = REQ_SENDFILE;
1233 req->fh = newSVsv (out_fh);
1234 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1235 req->fh2 = newSVsv (in_fh);
1236 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1237 req->offset = in_offset;
1238 req->length = length;
1239
1240 REQ_SEND;
1241}
1242
1243void
1244aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1245 SV * fh
1246 UV offset
1247 IV length
1248 SV * callback
1249 PROTOTYPE: $$$;$
1250 PPCODE:
1251{
1252 dREQ;
1253
1254 req->type = REQ_READAHEAD;
1255 req->fh = newSVsv (fh);
1256 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1257 req->offset = offset;
1258 req->length = length;
1259
1260 REQ_SEND;
1261}
1262
1263void
1264aio_stat (fh_or_path,callback=&PL_sv_undef)
1265 SV * fh_or_path
1266 SV * callback
1267 ALIAS:
1268 aio_stat = REQ_STAT
1269 aio_lstat = REQ_LSTAT
1270 PPCODE:
1271{
1272 dREQ;
1273
1274 New (0, req->statdata, 1, Stat_t);
1275 if (!req->statdata)
1276 {
1277 req_free (req);
1278 croak ("out of memory during aio_req->statdata allocation");
1279 }
1280
1281 if (SvPOK (fh_or_path))
1282 {
1283 req->type = ix;
1284 req->data = newSVsv (fh_or_path);
1285 req->dataptr = SvPVbyte_nolen (req->data);
1286 }
1287 else
1288 {
1289 req->type = REQ_FSTAT;
1290 req->fh = newSVsv (fh_or_path);
1291 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1292 }
1293
1294 REQ_SEND;
1295}
1296
1297void
1298aio_unlink (pathname,callback=&PL_sv_undef)
1299 SV * pathname
1300 SV * callback
1301 ALIAS:
1302 aio_unlink = REQ_UNLINK
1303 aio_rmdir = REQ_RMDIR
1304 aio_readdir = REQ_READDIR
1305 PPCODE:
1306{
1307 dREQ;
1308
1309 req->type = ix;
1310 req->data = newSVsv (pathname);
1311 req->dataptr = SvPVbyte_nolen (req->data);
1312
1313 REQ_SEND;
1314}
1315
1316void
1317aio_link (oldpath,newpath,callback=&PL_sv_undef)
1318 SV * oldpath
1319 SV * newpath
1320 SV * callback
1321 ALIAS:
1322 aio_link = REQ_LINK
1323 aio_symlink = REQ_SYMLINK
1324 aio_rename = REQ_RENAME
1325 PPCODE:
1326{
1327 dREQ;
1328
1329 req->type = ix;
1330 req->fh = newSVsv (oldpath);
1331 req->data2ptr = SvPVbyte_nolen (req->fh);
1332 req->data = newSVsv (newpath);
1333 req->dataptr = SvPVbyte_nolen (req->data);
1334
1335 REQ_SEND;
1336}
1337
1338void
1339aio_busy (delay,callback=&PL_sv_undef)
1340 double delay
1341 SV * callback
1342 PPCODE:
1343{
1344 dREQ;
1345
1346 req->type = REQ_BUSY;
1347 req->fd = delay < 0. ? 0 : delay;
1348 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1349
1350 REQ_SEND;
1351}
1352
1353void
1354aio_group (callback=&PL_sv_undef)
1355 SV * callback
1356 PROTOTYPE: ;$
1357 PPCODE:
1358{
1359 dREQ;
1360
1361 req->type = REQ_GROUP;
1362 req_send (req);
1363
1364 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1365}
1366
1367void
1368aio_nop (callback=&PL_sv_undef)
1369 SV * callback
1370 PPCODE:
1371{
1372 dREQ;
1373
1374 req->type = REQ_NOP;
1375
1376 REQ_SEND;
1377}
1378
1379void
1380aioreq_pri (int pri = DEFAULT_PRI)
1381 CODE:
1382 if (pri < PRI_MIN) pri = PRI_MIN;
1383 if (pri > PRI_MAX) pri = PRI_MAX;
1384 next_pri = pri + PRI_BIAS;
1385
1386void
1387aioreq_nice (int nice = 0)
1388 CODE:
1389 nice = next_pri - nice;
1390 if (nice < PRI_MIN) nice = PRI_MIN;
1391 if (nice > PRI_MAX) nice = PRI_MAX;
1392 next_pri = nice + PRI_BIAS;
1393
1394void
1395flush ()
1396 PROTOTYPE:
1397 CODE:
1398 while (nreqs)
400 { 1399 {
401 poll_wait (); 1400 poll_wait ();
402 poll_cb (); 1401 poll_cb ();
403 } 1402 }
404}
405 1403
406int
407max_outstanding(nreqs)
408 int nreqs
409 PROTOTYPE: $
410 CODE:
411 RETVAL = max_outstanding;
412 max_outstanding = nreqs;
413
414void 1404void
415aio_open(pathname,flags,mode,callback) 1405poll()
416 SV * pathname
417 int flags
418 int mode
419 SV * callback
420 PROTOTYPE: $$$$ 1406 PROTOTYPE:
421 CODE: 1407 CODE:
422{
423 aio_req req;
424
425 Newz (0, req, 1, aio_cb);
426
427 if (!req) 1408 if (nreqs)
428 croak ("out of memory during aio_req allocation");
429
430 req->type = REQ_OPEN;
431 req->data = newSVsv (pathname);
432 req->dataptr = SvPV_nolen (req->data);
433 req->fd = flags;
434 req->mode = mode;
435 req->callback = SvREFCNT_inc (callback);
436
437 send_req (req);
438}
439
440void
441aio_close(fh,callback)
442 InputStream fh
443 SV * callback
444 PROTOTYPE: $$
445 ALIAS:
446 aio_close = REQ_CLOSE
447 aio_fsync = REQ_FSYNC
448 aio_fdatasync = REQ_FDATASYNC
449 CODE:
450{
451 aio_req req;
452
453 Newz (0, req, 1, aio_cb);
454
455 if (!req)
456 croak ("out of memory during aio_req allocation");
457
458 req->type = ix;
459 req->fd = PerlIO_fileno (fh);
460 req->callback = SvREFCNT_inc (callback);
461
462 send_req (req);
463}
464
465void
466aio_read(fh,offset,length,data,dataoffset,callback)
467 InputStream fh
468 UV offset
469 IV length
470 SV * data
471 IV dataoffset
472 SV * callback
473 PROTOTYPE: $$$$$$
474 CODE:
475 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
476
477void
478aio_write(fh,offset,length,data,dataoffset,callback)
479 OutputStream fh
480 UV offset
481 IV length
482 SV * data
483 IV dataoffset
484 SV * callback
485 PROTOTYPE: $$$$$$
486 CODE:
487 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
488
489void
490aio_readahead(fh,offset,length,callback)
491 InputStream fh
492 UV offset
493 IV length
494 SV * callback
495 PROTOTYPE: $$$$
496 CODE:
497{
498 aio_req req;
499
500 if (length < 0)
501 croak ("length must not be negative");
502
503 Newz (0, req, 1, aio_cb);
504
505 if (!req)
506 croak ("out of memory during aio_req allocation");
507
508 req->type = REQ_READAHEAD;
509 req->fd = PerlIO_fileno (fh);
510 req->offset = offset;
511 req->length = length;
512 req->callback = SvREFCNT_inc (callback);
513
514 send_req (req);
515}
516
517void
518aio_stat(fh_or_path,callback)
519 SV * fh_or_path
520 SV * callback
521 PROTOTYPE: $$
522 ALIAS:
523 aio_lstat = 1
524 CODE:
525{
526 aio_req req;
527
528 Newz (0, req, 1, aio_cb);
529
530 if (!req)
531 croak ("out of memory during aio_req allocation");
532
533 New (0, req->statdata, 1, Stat_t);
534
535 if (!req->statdata)
536 croak ("out of memory during aio_req->statdata allocation");
537
538 if (SvPOK (fh_or_path))
539 { 1409 {
540 req->type = ix ? REQ_LSTAT : REQ_STAT; 1410 poll_wait ();
541 req->data = newSVsv (fh_or_path); 1411 poll_cb ();
542 req->dataptr = SvPV_nolen (req->data);
543 } 1412 }
544 else
545 {
546 req->type = REQ_FSTAT;
547 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548 }
549
550 req->callback = SvREFCNT_inc (callback);
551
552 send_req (req);
553}
554
555void
556aio_unlink(pathname,callback)
557 SV * pathname
558 SV * callback
559 PROTOTYPE: $$
560 CODE:
561{
562 aio_req req;
563
564 Newz (0, req, 1, aio_cb);
565
566 if (!req)
567 croak ("out of memory during aio_req allocation");
568
569 req->type = REQ_UNLINK;
570 req->data = newSVsv (pathname);
571 req->dataptr = SvPV_nolen (req->data);
572 req->callback = SvREFCNT_inc (callback);
573
574 send_req (req);
575}
576 1413
577int 1414int
578poll_fileno() 1415poll_fileno()
579 PROTOTYPE: 1416 PROTOTYPE:
580 CODE: 1417 CODE:
… …
603 CODE: 1440 CODE:
604 RETVAL = nreqs; 1441 RETVAL = nreqs;
605 OUTPUT: 1442 OUTPUT:
606 RETVAL 1443 RETVAL
607 1444
1445PROTOTYPES: DISABLE
1446
1447MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1448
1449void
1450cancel (aio_req_ornot req)
1451 CODE:
1452 req_cancel (req);
1453
1454void
1455cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1456 CODE:
1457 SvREFCNT_dec (req->callback);
1458 req->callback = newSVsv (callback);
1459
1460MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1461
1462void
1463add (aio_req grp, ...)
1464 PPCODE:
1465{
1466 int i;
1467 aio_req req;
1468
1469 if (grp->fd == 2)
1470 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1471
1472 for (i = 1; i < items; ++i )
1473 {
1474 if (GIMME_V != G_VOID)
1475 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1476
1477 req = SvAIO_REQ (ST (i));
1478
1479 if (req)
1480 {
1481 ++grp->length;
1482 req->grp = grp;
1483
1484 req->grp_prev = 0;
1485 req->grp_next = grp->grp_first;
1486
1487 if (grp->grp_first)
1488 grp->grp_first->grp_prev = req;
1489
1490 grp->grp_first = req;
1491 }
1492 }
1493}
1494
1495void
1496cancel_subs (aio_req_ornot req)
1497 CODE:
1498 req_cancel_subs (req);
1499
1500void
1501result (aio_req grp, ...)
1502 CODE:
1503{
1504 int i;
1505 AV *av = newAV ();
1506
1507 for (i = 1; i < items; ++i )
1508 av_push (av, newSVsv (ST (i)));
1509
1510 SvREFCNT_dec (grp->data);
1511 grp->data = (SV *)av;
1512}
1513
1514void
1515limit (aio_req grp, int limit)
1516 CODE:
1517 grp->fd2 = limit;
1518 aio_grp_feed (grp);
1519
1520void
1521feed (aio_req grp, SV *callback=&PL_sv_undef)
1522 CODE:
1523{
1524 SvREFCNT_dec (grp->fh2);
1525 grp->fh2 = newSVsv (callback);
1526
1527 if (grp->fd2 <= 0)
1528 grp->fd2 = 2;
1529
1530 aio_grp_feed (grp);
1531}
1532

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