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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.7 by root, Mon Jul 11 01:49:14 2005 UTC vs.
Revision 1.74 by root, Wed Oct 25 17:57:30 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
19 51
20#if __ia64 52#if __ia64
21# define STACKSIZE 65536 53# define STACKSIZE 65536
54#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55# define STACKSIZE PTHREAD_STACK_MIN
22#else 56#else
23# define STACKSIZE 4096 57# define STACKSIZE 16384
24#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;
25 70
26enum { 71enum {
27 REQ_QUIT, 72 REQ_QUIT,
28 REQ_OPEN, REQ_CLOSE, 73 REQ_OPEN, REQ_CLOSE,
29 REQ_READ, REQ_WRITE, REQ_READAHEAD, 74 REQ_READ, REQ_WRITE, REQ_READAHEAD,
75 REQ_SENDFILE,
30 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 76 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
31 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,
32}; 83};
33 84
85#define AIO_REQ_KLASS "IO::AIO::REQ"
86#define AIO_GRP_KLASS "IO::AIO::GRP"
87
34typedef struct aio_cb { 88typedef struct aio_cb
89{
35 struct aio_cb *volatile next; 90 struct aio_cb *volatile next;
36 91
37 int type; 92 SV *data, *callback;
38 93 SV *fh, *fh2;
39 int fd; 94 void *dataptr, *data2ptr;
95 Stat_t *statdata;
40 off_t offset; 96 off_t offset;
41 size_t length; 97 size_t length;
42 ssize_t result; 98 ssize_t result;
99
100 STRLEN dataoffset;
101 int type;
102 int fd, fd2;
103 int errorno;
43 mode_t mode; /* open */ 104 mode_t mode; /* open */
44 int errorno;
45 SV *data, *callback;
46 void *dataptr;
47 STRLEN dataoffset;
48 105
49 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;
50} aio_cb; 111} aio_cb;
51 112
113enum {
114 FLAG_CANCELLED = 0x01,
115};
116
52typedef aio_cb *aio_req; 117typedef aio_cb *aio_req;
118typedef aio_cb *aio_req_ornot;
53 119
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
54static int started; 131static int started, wanted;
55static int nreqs; 132static volatile int nreqs;
56static int max_outstanding = 1<<30;
57static int respipe [2]; 133static int respipe [2];
58 134
135#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
136# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137#else
138# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139#endif
140
141#define LOCK(mutex) pthread_mutex_lock (&(mutex))
142#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
143
144/* worker threasd management */
145static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
146
147typedef struct worker {
148 /* locked by wrklock */
149 struct worker *prev, *next;
150
151 pthread_t tid;
152
153 /* locked by reslock, reqlock or wrklock */
154 aio_req req; /* currently processed request */
155 void *dbuf;
156 DIR *dirp;
157} worker;
158
159static worker wrk_first = { &wrk_first, &wrk_first, 0 };
160
161static void worker_clear (worker *wrk)
162{
163 if (wrk->dirp)
164 {
165 closedir (wrk->dirp);
166 wrk->dirp = 0;
167 }
168
169 if (wrk->dbuf)
170 {
171 free (wrk->dbuf);
172 wrk->dbuf = 0;
173 }
174}
175
176static void worker_free (worker *wrk)
177{
178 wrk->next->prev = wrk->prev;
179 wrk->prev->next = wrk->next;
180
181 free (wrk);
182}
183
59static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 184static pthread_mutex_t reslock = AIO_MUTEX_INIT;
60static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER; 185static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
61static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER; 186static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62 187
63static volatile aio_req reqs, reqe; /* queue start, queue end */ 188/*
64static volatile aio_req ress, rese; /* queue start, queue end */ 189 * a somewhat faster data structure might be nice, but
190 * with 8 priorities this actually needs <20 insns
191 * per shift, the most expensive operation.
192 */
193typedef struct {
194 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
195 int size;
196} reqq;
65 197
66static void 198static reqq req_queue;
67poll_wait () 199static reqq res_queue;
200
201int reqq_push (reqq *q, aio_req req)
68{ 202{
203 int pri = req->pri;
204 req->next = 0;
205
206 if (q->qe[pri])
207 {
208 q->qe[pri]->next = req;
209 q->qe[pri] = req;
210 }
211 else
212 q->qe[pri] = q->qs[pri] = req;
213
214 return q->size++;
215}
216
217aio_req reqq_shift (reqq *q)
218{
219 int pri;
220
221 if (!q->size)
222 return 0;
223
224 --q->size;
225
226 for (pri = NUM_PRI; pri--; )
227 {
228 aio_req req = q->qs[pri];
229
230 if (req)
231 {
232 if (!(q->qs[pri] = req->next))
233 q->qe[pri] = 0;
234
235 return req;
236 }
237 }
238
239 abort ();
240}
241
242static int poll_cb ();
243static void req_invoke (aio_req req);
244static void req_free (aio_req req);
245static void req_cancel (aio_req req);
246
247/* must be called at most once */
248static SV *req_sv (aio_req req, const char *klass)
249{
69 if (!nreqs) 250 if (!req->self)
251 {
252 req->self = (SV *)newHV ();
253 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
254 }
255
256 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
257}
258
259static aio_req SvAIO_REQ (SV *sv)
260{
261 MAGIC *mg;
262
263 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
264 croak ("object of class " AIO_REQ_KLASS " expected");
265
266 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
267
268 return mg ? (aio_req)mg->mg_ptr : 0;
269}
270
271static void aio_grp_feed (aio_req grp)
272{
273 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
274 {
275 int old_len = grp->length;
276
277 if (grp->fh2 && SvOK (grp->fh2))
278 {
279 dSP;
280
281 ENTER;
282 SAVETMPS;
283 PUSHMARK (SP);
284 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
285 PUTBACK;
286 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
287 SPAGAIN;
288 FREETMPS;
289 LEAVE;
290 }
291
292 /* stop if no progress has been made */
293 if (old_len == grp->length)
294 {
295 SvREFCNT_dec (grp->fh2);
296 grp->fh2 = 0;
297 break;
298 }
299 }
300}
301
302static void aio_grp_dec (aio_req grp)
303{
304 --grp->length;
305
306 /* call feeder, if applicable */
307 aio_grp_feed (grp);
308
309 /* finish, if done */
310 if (!grp->length && grp->fd)
311 {
312 req_invoke (grp);
313 req_free (grp);
314 }
315}
316
317static void poll_wait ()
318{
319 fd_set rfd;
320
321 while (nreqs)
322 {
323 int size;
324#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
325 LOCK (reslock);
326#endif
327 size = res_queue.size;
328#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
329 UNLOCK (reslock);
330#endif
331
332 if (size)
333 return;
334
335 FD_ZERO(&rfd);
336 FD_SET(respipe [0], &rfd);
337
338 select (respipe [0] + 1, &rfd, 0, 0, 0);
339 }
340}
341
342static void req_invoke (aio_req req)
343{
344 dSP;
345
346 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
347 {
348 errno = req->errorno;
349
350 ENTER;
351 SAVETMPS;
352 PUSHMARK (SP);
353 EXTEND (SP, 1);
354
355 switch (req->type)
356 {
357 case REQ_READDIR:
358 {
359 SV *rv = &PL_sv_undef;
360
361 if (req->result >= 0)
362 {
363 int i;
364 char *buf = req->data2ptr;
365 AV *av = newAV ();
366
367 av_extend (av, req->result - 1);
368
369 for (i = 0; i < req->result; ++i)
370 {
371 SV *sv = newSVpv (buf, 0);
372
373 av_store (av, i, sv);
374 buf += SvCUR (sv) + 1;
375 }
376
377 rv = sv_2mortal (newRV_noinc ((SV *)av));
378 }
379
380 PUSHs (rv);
381 }
382 break;
383
384 case REQ_OPEN:
385 {
386 /* convert fd to fh */
387 SV *fh;
388
389 PUSHs (sv_2mortal (newSViv (req->result)));
390 PUTBACK;
391 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
392 SPAGAIN;
393
394 fh = SvREFCNT_inc (POPs);
395
396 PUSHMARK (SP);
397 XPUSHs (sv_2mortal (fh));
398 }
399 break;
400
401 case REQ_GROUP:
402 req->fd = 2; /* mark group as finished */
403
404 if (req->data)
405 {
406 int i;
407 AV *av = (AV *)req->data;
408
409 EXTEND (SP, AvFILL (av) + 1);
410 for (i = 0; i <= AvFILL (av); ++i)
411 PUSHs (*av_fetch (av, i, 0));
412 }
413 break;
414
415 case REQ_NOP:
416 case REQ_BUSY:
417 break;
418
419 default:
420 PUSHs (sv_2mortal (newSViv (req->result)));
421 break;
422 }
423
424
425 PUTBACK;
426 call_sv (req->callback, G_VOID | G_EVAL);
427 SPAGAIN;
428
429 FREETMPS;
430 LEAVE;
431 }
432
433 if (req->grp)
434 {
435 aio_req grp = req->grp;
436
437 /* unlink request */
438 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
439 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
440
441 if (grp->grp_first == req)
442 grp->grp_first = req->grp_next;
443
444 aio_grp_dec (grp);
445 }
446
447 if (SvTRUE (ERRSV))
448 {
449 req_free (req);
450 croak (0);
451 }
452}
453
454static void req_free (aio_req req)
455{
456 if (req->self)
457 {
458 sv_unmagic (req->self, PERL_MAGIC_ext);
459 SvREFCNT_dec (req->self);
460 }
461
462 SvREFCNT_dec (req->data);
463 SvREFCNT_dec (req->fh);
464 SvREFCNT_dec (req->fh2);
465 SvREFCNT_dec (req->callback);
466 Safefree (req->statdata);
467
468 if (req->type == REQ_READDIR)
469 free (req->data2ptr);
470
471 Safefree (req);
472}
473
474static void req_cancel_subs (aio_req grp)
475{
476 aio_req sub;
477
478 if (grp->type != REQ_GROUP)
70 return; 479 return;
71 480
72 fd_set rfd; 481 SvREFCNT_dec (grp->fh2);
73 FD_ZERO(&rfd); 482 grp->fh2 = 0;
74 FD_SET(respipe [0], &rfd);
75 483
76 select (respipe [0] + 1, &rfd, 0, 0, 0); 484 for (sub = grp->grp_first; sub; sub = sub->grp_next)
485 req_cancel (sub);
77} 486}
78 487
79static int 488static void req_cancel (aio_req req)
80poll_cb () 489{
490 req->flags |= FLAG_CANCELLED;
491
492 req_cancel_subs (req);
493}
494
495static int poll_cb ()
81{ 496{
82 dSP; 497 dSP;
83 int count = 0; 498 int count = 0;
499 int do_croak = 0;
84 aio_req req; 500 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 }
92 501
93 for (;;) 502 for (;;)
94 { 503 {
95 pthread_mutex_lock (&reslock); 504 LOCK (reslock);
505 req = reqq_shift (&res_queue);
96 506
97 req = ress;
98
99 if (ress) 507 if (req)
100 { 508 {
101 ress = ress->next; 509 if (!res_queue.size)
102 if (!ress) rese = 0; 510 {
511 /* read any signals sent by the worker threads */
512 char buf [32];
513 while (read (respipe [0], buf, 32) == 32)
514 ;
515 }
103 } 516 }
104 517
105 pthread_mutex_unlock (&reslock); 518 UNLOCK (reslock);
106 519
107 if (!req) 520 if (!req)
108 break; 521 break;
109 522
110 nreqs--; 523 --nreqs;
111 524
112 if (req->type == REQ_QUIT) 525 if (req->type == REQ_QUIT)
113 started--; 526 started--;
527 else if (req->type == REQ_GROUP && req->length)
528 {
529 req->fd = 1; /* mark request as delayed */
530 continue;
531 }
114 else 532 else
115 { 533 {
116 int errorno = errno;
117 errno = req->errorno;
118
119 if (req->type == REQ_READ) 534 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset 535 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
121 + req->result > 0 ? req->result : 0);
122 536
537 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538 SvREADONLY_off (req->data);
539
123 if (req->data) 540 if (req->statdata)
124 SvREFCNT_dec (req->data);
125
126 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127 { 541 {
128 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 542 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129 PL_laststatval = req->result; 543 PL_laststatval = req->result;
130 PL_statcache = *(req->statdata); 544 PL_statcache = *(req->statdata);
131
132 Safefree (req->statdata);
133 } 545 }
134 546
135 PUSHMARK (SP); 547 req_invoke (req);
136 XPUSHs (sv_2mortal (newSViv (req->result)));
137 548
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++; 549 count++;
162 } 550 }
163 551
164 Safefree (req); 552 req_free (req);
165 } 553 }
166 554
167 return count; 555 return count;
168} 556}
169 557
170static void *aio_proc(void *arg); 558static void *aio_proc(void *arg);
171 559
172static void
173start_thread (void) 560static void start_thread (void)
174{ 561{
175 sigset_t fullsigset, oldsigset; 562 sigset_t fullsigset, oldsigset;
176 pthread_t tid;
177 pthread_attr_t attr; 563 pthread_attr_t attr;
564
565 worker *wrk = calloc (1, sizeof (worker));
566
567 if (!wrk)
568 croak ("unable to allocate worker thread data");
178 569
179 pthread_attr_init (&attr); 570 pthread_attr_init (&attr);
180 pthread_attr_setstacksize (&attr, STACKSIZE); 571 pthread_attr_setstacksize (&attr, STACKSIZE);
181 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 572 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
182 573
183 sigfillset (&fullsigset); 574 sigfillset (&fullsigset);
575
576 LOCK (wrklock);
184 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset); 577 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
185 578
186 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 579 if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
580 {
581 wrk->prev = &wrk_first;
582 wrk->next = wrk_first.next;
583 wrk_first.next->prev = wrk;
584 wrk_first.next = wrk;
187 started++; 585 started++;
586 }
587 else
588 free (wrk);
188 589
189 sigprocmask (SIG_SETMASK, &oldsigset, 0); 590 sigprocmask (SIG_SETMASK, &oldsigset, 0);
591 UNLOCK (wrklock);
190} 592}
191 593
192static void 594static void req_send (aio_req req)
193send_req (aio_req req)
194{ 595{
596 while (started < wanted && nreqs >= started)
597 start_thread ();
598
195 nreqs++; 599 ++nreqs;
196 600
197 pthread_mutex_lock (&reqlock); 601 LOCK (reqlock);
198 602 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); 603 pthread_cond_signal (&reqwait);
210 pthread_mutex_unlock (&reqlock); 604 UNLOCK (reqlock);
605}
211 606
212 while (nreqs > max_outstanding) 607static void end_thread (void)
608{
609 aio_req req;
610
611 Newz (0, req, 1, aio_cb);
612
613 req->type = REQ_QUIT;
614 req->pri = PRI_MAX + PRI_BIAS;
615
616 req_send (req);
617}
618
619static void min_parallel (int nthreads)
620{
621 if (wanted < nthreads)
622 wanted = nthreads;
623}
624
625static void max_parallel (int nthreads)
626{
627 int cur = started;
628
629 if (wanted > nthreads)
630 wanted = nthreads;
631
632 while (cur > wanted)
633 {
634 end_thread ();
635 cur--;
636 }
637
638 while (started > wanted)
213 { 639 {
214 poll_wait (); 640 poll_wait ();
215 poll_cb (); 641 poll_cb ();
216 } 642 }
217} 643}
218 644
219static void 645static void create_pipe ()
220end_thread (void)
221{ 646{
222 aio_req req; 647 if (pipe (respipe))
223 New (0, req, 1, aio_cb); 648 croak ("unable to initialize result pipe");
224 req->type = REQ_QUIT;
225 649
226 send_req (req); 650 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
227} 651 croak ("cannot set result pipe to nonblocking mode");
228 652
229static void 653 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
230read_write (int dowrite, int fd, off_t offset, size_t length, 654 croak ("cannot set result pipe to nonblocking mode");
231 SV *data, STRLEN dataoffset, SV *callback) 655}
232{
233 aio_req req;
234 STRLEN svlen;
235 char *svptr = SvPV (data, svlen);
236 656
237 SvUPGRADE (data, SVt_PV); 657/*****************************************************************************/
238 SvPOK_on (data); 658/* work around various missing functions */
239 659
240 if (dataoffset < 0) 660#if !HAVE_PREADWRITE
661# define pread aio_pread
662# define pwrite aio_pwrite
663
664/*
665 * make our pread/pwrite safe against themselves, but not against
666 * normal read/write by using a mutex. slows down execution a lot,
667 * but that's your problem, not mine.
668 */
669static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
670
671static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
672{
673 ssize_t res;
674 off_t ooffset;
675
676 LOCK (preadwritelock);
677 ooffset = lseek (fd, 0, SEEK_CUR);
678 lseek (fd, offset, SEEK_SET);
679 res = read (fd, buf, count);
680 lseek (fd, ooffset, SEEK_SET);
681 UNLOCK (preadwritelock);
682
683 return res;
684}
685
686static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
687{
688 ssize_t res;
689 off_t ooffset;
690
691 LOCK (preadwritelock);
692 ooffset = lseek (fd, 0, SEEK_CUR);
693 lseek (fd, offset, SEEK_SET);
694 res = write (fd, buf, count);
695 lseek (fd, offset, SEEK_SET);
696 UNLOCK (preadwritelock);
697
698 return res;
699}
700#endif
701
702#if !HAVE_FDATASYNC
703# define fdatasync fsync
704#endif
705
706#if !HAVE_READAHEAD
707# define readahead aio_readahead
708
709static ssize_t readahead (int fd, off_t offset, size_t count)
710{
711 dBUF;
712
713 while (count > 0)
714 {
715 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
716
717 pread (fd, aio_buf, len, offset);
241 dataoffset += svlen; 718 offset += len;
242 719 count -= len;
243 if (dataoffset < 0 || dataoffset > svlen)
244 croak ("data offset outside of string");
245
246 if (dowrite)
247 { 720 }
248 /* write: check length and adjust. */ 721
249 if (length < 0 || length + dataoffset > svlen) 722 errno = 0;
250 length = svlen - dataoffset; 723}
724#endif
725
726#if !HAVE_READDIR_R
727# define readdir_r aio_readdir_r
728
729static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
730
731static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
732{
733 struct dirent *e;
734 int errorno;
735
736 LOCK (readdirlock);
737
738 e = readdir (dirp);
739 errorno = errno;
740
741 if (e)
742 {
743 *res = ent;
744 strcpy (ent->d_name, e->d_name);
251 } 745 }
252 else 746 else
747 *res = 0;
748
749 UNLOCK (readdirlock);
750
751 errno = errorno;
752 return e ? 0 : -1;
753}
754#endif
755
756/* sendfile always needs emulation */
757static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
758{
759 ssize_t res;
760
761 if (!count)
762 return 0;
763
764#if HAVE_SENDFILE
765# if __linux
766 res = sendfile (ofd, ifd, &offset, count);
767
768# elif __freebsd
769 /*
770 * Of course, the freebsd sendfile is a dire hack with no thoughts
771 * wasted on making it similar to other I/O functions.
772 */
773 {
774 off_t sbytes;
775 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
776
777 if (res < 0 && sbytes)
778 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
779 res = sbytes;
780 }
781
782# elif __hpux
783 res = sendfile (ofd, ifd, offset, count, 0, 0);
784
785# elif __solaris
786 {
787 struct sendfilevec vec;
788 size_t sbytes;
789
790 vec.sfv_fd = ifd;
791 vec.sfv_flag = 0;
792 vec.sfv_off = offset;
793 vec.sfv_len = count;
794
795 res = sendfilev (ofd, &vec, 1, &sbytes);
796
797 if (res < 0 && sbytes)
798 res = sbytes;
799 }
800
801# endif
802#else
803 res = -1;
804 errno = ENOSYS;
805#endif
806
807 if (res < 0
808 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
809#if __solaris
810 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
811#endif
812 )
813 )
814 {
815 /* emulate sendfile. this is a major pain in the ass */
816 dBUF;
817
818 res = 0;
819
820 while (count)
821 {
822 ssize_t cnt;
823
824 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
825
826 if (cnt <= 0)
827 {
828 if (cnt && !res) res = -1;
829 break;
830 }
831
832 cnt = write (ofd, aio_buf, cnt);
833
834 if (cnt <= 0)
835 {
836 if (cnt && !res) res = -1;
837 break;
838 }
839
840 offset += cnt;
841 res += cnt;
842 count -= cnt;
843 }
844 }
845
846 return res;
847}
848
849/* read a full directory */
850static void scandir_ (aio_req req, worker *self)
851{
852 DIR *dirp;
853 union
854 {
855 struct dirent d;
856 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
857 } *u;
858 struct dirent *entp;
859 char *name, *names;
860 int memlen = 4096;
861 int memofs = 0;
862 int res = 0;
863 int errorno;
864
865 LOCK (wrklock);
866 self->dirp = dirp = opendir (req->dataptr);
867 self->dbuf = u = malloc (sizeof (*u));
868 UNLOCK (wrklock);
869
870 req->data2ptr = names = malloc (memlen);
871
872 if (dirp && u && names)
873 for (;;)
253 { 874 {
254 /* read: grow scalar as necessary */ 875 errno = 0;
255 svptr = SvGROW (data, length + dataoffset); 876 readdir_r (dirp, &u->d, &entp);
877
878 if (!entp)
879 break;
880
881 name = entp->d_name;
882
883 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
884 {
885 int len = strlen (name) + 1;
886
887 res++;
888
889 while (memofs + len > memlen)
890 {
891 memlen *= 2;
892 LOCK (wrklock);
893 req->data2ptr = names = realloc (names, memlen);
894 UNLOCK (wrklock);
895
896 if (!names)
897 break;
898 }
899
900 memcpy (names + memofs, name, len);
901 memofs += len;
902 }
256 } 903 }
257 904
258 if (length < 0) 905 if (errno)
259 croak ("length must not be negative"); 906 res = -1;
260 907
261 Newz (0, req, 1, aio_cb); 908 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} 909}
276 910
277static void * 911/*****************************************************************************/
912
278aio_proc (void *thr_arg) 913static void *aio_proc (void *thr_arg)
279{ 914{
280 aio_req req; 915 aio_req req;
281 int type; 916 int type;
917 worker *self = (worker *)thr_arg;
282 918
283 do 919 do
284 { 920 {
285 pthread_mutex_lock (&reqlock); 921 LOCK (reqlock);
286 922
287 for (;;) 923 for (;;)
288 { 924 {
289 req = reqs; 925 self->req = req = reqq_shift (&req_queue);
290
291 if (reqs)
292 {
293 reqs = reqs->next;
294 if (!reqs) reqe = 0;
295 }
296 926
297 if (req) 927 if (req)
298 break; 928 break;
299 929
300 pthread_cond_wait (&reqwait, &reqlock); 930 pthread_cond_wait (&reqwait, &reqlock);
301 } 931 }
302 932
303 pthread_mutex_unlock (&reqlock); 933 UNLOCK (reqlock);
304 934
305 errno = 0; /* strictly unnecessary */ 935 errno = 0; /* strictly unnecessary */
936 type = req->type; /* remember type for QUIT check */
306 937
307 type = req->type; 938 if (!(req->flags & FLAG_CANCELLED))
308
309 switch (type) 939 switch (type)
310 { 940 {
311 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 941 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; 942 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
313#if SYS_readahead 943
314 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 944 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
315#else 945 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
318 946
319 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 947 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
320 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 948 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
321 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 949 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
322 950
323 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 951 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
324 case REQ_CLOSE: req->result = close (req->fd); break; 952 case REQ_CLOSE: req->result = close (req->fd); break;
325 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 953 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
326
327 case REQ_FSYNC: req->result = fsync (req->fd); break; 954 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
955 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
956 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
957 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
958
328 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 959 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
960 case REQ_FSYNC: req->result = fsync (req->fd); break;
961 case REQ_READDIR: scandir_ (req, self); break;
329 962
963 case REQ_BUSY:
964 {
965 struct timeval tv;
966
967 tv.tv_sec = req->fd;
968 tv.tv_usec = req->fd2;
969
970 req->result = select (0, 0, 0, 0, &tv);
971 }
972
973 case REQ_GROUP:
974 case REQ_NOP:
330 case REQ_QUIT: 975 case REQ_QUIT:
331 break; 976 break;
332 977
333 default: 978 default:
334 req->result = ENOSYS; 979 req->result = ENOSYS;
335 break; 980 break;
336 } 981 }
337 982
338 req->errorno = errno; 983 req->errorno = errno;
339 984
340 pthread_mutex_lock (&reslock); 985 LOCK (reslock);
341 986
342 req->next = 0; 987 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 */ 988 /* write a dummy byte to the pipe so fh becomes ready */
354 write (respipe [1], &respipe, 1); 989 write (respipe [1], &respipe, 1);
355 }
356 990
357 pthread_mutex_unlock (&reslock); 991 self->req = 0;
992 worker_clear (self);
993
994 UNLOCK (reslock);
358 } 995 }
359 while (type != REQ_QUIT); 996 while (type != REQ_QUIT);
360 997
998 LOCK (wrklock);
999 worker_free (self);
1000 UNLOCK (wrklock);
1001
361 return 0; 1002 return 0;
362} 1003}
363 1004
1005/*****************************************************************************/
1006
1007static void atfork_prepare (void)
1008{
1009 LOCK (wrklock);
1010 LOCK (reqlock);
1011 LOCK (reslock);
1012#if !HAVE_PREADWRITE
1013 LOCK (preadwritelock);
1014#endif
1015#if !HAVE_READDIR_R
1016 LOCK (readdirlock);
1017#endif
1018}
1019
1020static void atfork_parent (void)
1021{
1022#if !HAVE_READDIR_R
1023 UNLOCK (readdirlock);
1024#endif
1025#if !HAVE_PREADWRITE
1026 UNLOCK (preadwritelock);
1027#endif
1028 UNLOCK (reslock);
1029 UNLOCK (reqlock);
1030 UNLOCK (wrklock);
1031}
1032
1033static void atfork_child (void)
1034{
1035 aio_req prv;
1036
1037 while (prv = reqq_shift (&req_queue))
1038 req_free (prv);
1039
1040 while (prv = reqq_shift (&res_queue))
1041 req_free (prv);
1042
1043 while (wrk_first.next != &wrk_first)
1044 {
1045 worker *wrk = wrk_first.next;
1046
1047 if (wrk->req)
1048 req_free (wrk->req);
1049
1050 worker_clear (wrk);
1051 worker_free (wrk);
1052 }
1053
1054 started = 0;
1055 nreqs = 0;
1056
1057 close (respipe [0]);
1058 close (respipe [1]);
1059 create_pipe ();
1060
1061 atfork_parent ();
1062}
1063
1064#define dREQ \
1065 aio_req req; \
1066 int req_pri = next_pri; \
1067 next_pri = DEFAULT_PRI + PRI_BIAS; \
1068 \
1069 if (SvOK (callback) && !SvROK (callback)) \
1070 croak ("callback must be undef or of reference type"); \
1071 \
1072 Newz (0, req, 1, aio_cb); \
1073 if (!req) \
1074 croak ("out of memory during aio_req allocation"); \
1075 \
1076 req->callback = newSVsv (callback); \
1077 req->pri = req_pri
1078
1079#define REQ_SEND \
1080 req_send (req); \
1081 \
1082 if (GIMME_V != G_VOID) \
1083 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1084
364MODULE = IO::AIO PACKAGE = IO::AIO 1085MODULE = IO::AIO PACKAGE = IO::AIO
365 1086
1087PROTOTYPES: ENABLE
1088
366BOOT: 1089BOOT:
367{ 1090{
368 if (pipe (respipe)) 1091 HV *stash = gv_stashpv ("IO::AIO", 1);
369 croak ("unable to initialize result pipe"); 1092 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1093 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1094 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
370 1095
371 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 1096 create_pipe ();
372 croak ("cannot set result pipe to nonblocking mode"); 1097 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} 1098}
377 1099
378void 1100void
379min_parallel(nthreads) 1101min_parallel (nthreads)
380 int nthreads 1102 int nthreads
381 PROTOTYPE: $ 1103 PROTOTYPE: $
382 CODE:
383 while (nthreads > started)
384 start_thread ();
385 1104
386void 1105void
387max_parallel(nthreads) 1106max_parallel (nthreads)
388 int nthreads 1107 int nthreads
389 PROTOTYPE: $ 1108 PROTOTYPE: $
390 CODE:
391{
392 int cur = started;
393 while (cur > nthreads)
394 {
395 end_thread ();
396 cur--;
397 }
398 1109
399 while (started > nthreads)
400 {
401 poll_wait ();
402 poll_cb ();
403 }
404}
405
406int
407max_outstanding(nreqs)
408 int nreqs
409 PROTOTYPE: $
410 CODE:
411 RETVAL = max_outstanding;
412 max_outstanding = nreqs;
413
414void 1110void
415aio_open(pathname,flags,mode,callback) 1111aio_open (pathname,flags,mode,callback=&PL_sv_undef)
416 SV * pathname 1112 SV * pathname
417 int flags 1113 int flags
418 int mode 1114 int mode
419 SV * callback 1115 SV * callback
420 PROTOTYPE: $$$$ 1116 PROTOTYPE: $$$;$
421 CODE: 1117 PPCODE:
422{ 1118{
423 aio_req req; 1119 dREQ;
424
425 Newz (0, req, 1, aio_cb);
426
427 if (!req)
428 croak ("out of memory during aio_req allocation");
429 1120
430 req->type = REQ_OPEN; 1121 req->type = REQ_OPEN;
431 req->data = newSVsv (pathname); 1122 req->data = newSVsv (pathname);
432 req->dataptr = SvPV_nolen (req->data); 1123 req->dataptr = SvPVbyte_nolen (req->data);
433 req->fd = flags; 1124 req->fd = flags;
434 req->mode = mode; 1125 req->mode = mode;
435 req->callback = SvREFCNT_inc (callback);
436 1126
437 send_req (req); 1127 REQ_SEND;
438} 1128}
439 1129
440void 1130void
441aio_close(fh,callback) 1131aio_close (fh,callback=&PL_sv_undef)
442 InputStream fh 1132 SV * fh
443 SV * callback 1133 SV * callback
444 PROTOTYPE: $$ 1134 PROTOTYPE: $;$
445 ALIAS: 1135 ALIAS:
446 aio_close = REQ_CLOSE 1136 aio_close = REQ_CLOSE
447 aio_fsync = REQ_FSYNC 1137 aio_fsync = REQ_FSYNC
448 aio_fdatasync = REQ_FDATASYNC 1138 aio_fdatasync = REQ_FDATASYNC
449 CODE: 1139 PPCODE:
1140{
1141 dREQ;
1142
1143 req->type = ix;
1144 req->fh = newSVsv (fh);
1145 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1146
1147 REQ_SEND (req);
1148}
1149
1150void
1151aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1152 SV * fh
1153 UV offset
1154 UV length
1155 SV * data
1156 UV dataoffset
1157 SV * callback
1158 ALIAS:
1159 aio_read = REQ_READ
1160 aio_write = REQ_WRITE
1161 PROTOTYPE: $$$$$;$
1162 PPCODE:
450{ 1163{
451 aio_req req; 1164 aio_req req;
1165 STRLEN svlen;
1166 char *svptr = SvPVbyte (data, svlen);
452 1167
453 Newz (0, req, 1, aio_cb); 1168 SvUPGRADE (data, SVt_PV);
1169 SvPOK_on (data);
454 1170
455 if (!req) 1171 if (dataoffset < 0)
456 croak ("out of memory during aio_req allocation"); 1172 dataoffset += svlen;
457 1173
458 req->type = ix; 1174 if (dataoffset < 0 || dataoffset > svlen)
459 req->fd = PerlIO_fileno (fh); 1175 croak ("data offset outside of string");
460 req->callback = SvREFCNT_inc (callback);
461 1176
462 send_req (req); 1177 if (ix == REQ_WRITE)
463} 1178 {
464 1179 /* write: check length and adjust. */
465void 1180 if (length < 0 || length + dataoffset > svlen)
466aio_read(fh,offset,length,data,dataoffset,callback) 1181 length = svlen - dataoffset;
467 InputStream fh 1182 }
468 UV offset 1183 else
469 IV length 1184 {
470 SV * data 1185 /* read: grow scalar as necessary */
471 IV dataoffset 1186 svptr = SvGROW (data, length + dataoffset);
472 SV * callback 1187 }
473 PROTOTYPE: $$$$$$
474 CODE:
475 read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
476
477void
478aio_write(fh,offset,length,data,dataoffset,callback)
479 OutputStream fh
480 UV offset
481 IV length
482 SV * data
483 IV dataoffset
484 SV * callback
485 PROTOTYPE: $$$$$$
486 CODE:
487 read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
488
489void
490aio_readahead(fh,offset,length,callback)
491 InputStream fh
492 UV offset
493 IV length
494 SV * callback
495 PROTOTYPE: $$$$
496 CODE:
497{
498 aio_req req;
499 1188
500 if (length < 0) 1189 if (length < 0)
501 croak ("length must not be negative"); 1190 croak ("length must not be negative");
502 1191
503 Newz (0, req, 1, aio_cb); 1192 {
1193 dREQ;
504 1194
505 if (!req) 1195 req->type = ix;
506 croak ("out of memory during aio_req allocation"); 1196 req->fh = newSVsv (fh);
1197 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1198 : IoOFP (sv_2io (fh)));
1199 req->offset = offset;
1200 req->length = length;
1201 req->data = SvREFCNT_inc (data);
1202 req->dataptr = (char *)svptr + dataoffset;
1203
1204 if (!SvREADONLY (data))
1205 {
1206 SvREADONLY_on (data);
1207 req->data2ptr = (void *)data;
1208 }
1209
1210 REQ_SEND;
1211 }
1212}
1213
1214void
1215aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1216 SV * out_fh
1217 SV * in_fh
1218 UV in_offset
1219 UV length
1220 SV * callback
1221 PROTOTYPE: $$$$;$
1222 PPCODE:
1223{
1224 dREQ;
1225
1226 req->type = REQ_SENDFILE;
1227 req->fh = newSVsv (out_fh);
1228 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1229 req->fh2 = newSVsv (in_fh);
1230 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1231 req->offset = in_offset;
1232 req->length = length;
1233
1234 REQ_SEND;
1235}
1236
1237void
1238aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1239 SV * fh
1240 UV offset
1241 IV length
1242 SV * callback
1243 PROTOTYPE: $$$;$
1244 PPCODE:
1245{
1246 dREQ;
507 1247
508 req->type = REQ_READAHEAD; 1248 req->type = REQ_READAHEAD;
1249 req->fh = newSVsv (fh);
509 req->fd = PerlIO_fileno (fh); 1250 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
510 req->offset = offset; 1251 req->offset = offset;
511 req->length = length; 1252 req->length = length;
512 req->callback = SvREFCNT_inc (callback);
513 1253
514 send_req (req); 1254 REQ_SEND;
515} 1255}
516 1256
517void 1257void
518aio_stat(fh_or_path,callback) 1258aio_stat (fh_or_path,callback=&PL_sv_undef)
519 SV * fh_or_path 1259 SV * fh_or_path
520 SV * callback 1260 SV * callback
521 PROTOTYPE: $$
522 ALIAS: 1261 ALIAS:
1262 aio_stat = REQ_STAT
523 aio_lstat = 1 1263 aio_lstat = REQ_LSTAT
524 CODE: 1264 PPCODE:
525{ 1265{
526 aio_req req; 1266 dREQ;
527
528 Newz (0, req, 1, aio_cb);
529
530 if (!req)
531 croak ("out of memory during aio_req allocation");
532 1267
533 New (0, req->statdata, 1, Stat_t); 1268 New (0, req->statdata, 1, Stat_t);
534
535 if (!req->statdata) 1269 if (!req->statdata)
1270 {
1271 req_free (req);
536 croak ("out of memory during aio_req->statdata allocation"); 1272 croak ("out of memory during aio_req->statdata allocation");
1273 }
537 1274
538 if (SvPOK (fh_or_path)) 1275 if (SvPOK (fh_or_path))
539 { 1276 {
540 req->type = ix ? REQ_LSTAT : REQ_STAT; 1277 req->type = ix;
541 req->data = newSVsv (fh_or_path); 1278 req->data = newSVsv (fh_or_path);
542 req->dataptr = SvPV_nolen (req->data); 1279 req->dataptr = SvPVbyte_nolen (req->data);
543 } 1280 }
544 else 1281 else
545 { 1282 {
546 req->type = REQ_FSTAT; 1283 req->type = REQ_FSTAT;
1284 req->fh = newSVsv (fh_or_path);
547 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1285 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548 } 1286 }
549 1287
550 req->callback = SvREFCNT_inc (callback); 1288 REQ_SEND;
551
552 send_req (req);
553} 1289}
554 1290
555void 1291void
556aio_unlink(pathname,callback) 1292aio_unlink (pathname,callback=&PL_sv_undef)
557 SV * pathname 1293 SV * pathname
558 SV * callback 1294 SV * callback
559 PROTOTYPE: $$ 1295 ALIAS:
1296 aio_unlink = REQ_UNLINK
1297 aio_rmdir = REQ_RMDIR
1298 aio_readdir = REQ_READDIR
560 CODE: 1299 PPCODE:
561{ 1300{
562 aio_req req; 1301 dREQ;
563 1302
564 Newz (0, req, 1, aio_cb); 1303 req->type = ix;
1304 req->data = newSVsv (pathname);
1305 req->dataptr = SvPVbyte_nolen (req->data);
565 1306
566 if (!req) 1307 REQ_SEND;
567 croak ("out of memory during aio_req allocation"); 1308}
1309
1310void
1311aio_link (oldpath,newpath,callback=&PL_sv_undef)
1312 SV * oldpath
1313 SV * newpath
1314 SV * callback
1315 ALIAS:
1316 aio_link = REQ_LINK
1317 aio_symlink = REQ_SYMLINK
1318 aio_rename = REQ_RENAME
1319 PPCODE:
1320{
1321 dREQ;
568 1322
569 req->type = REQ_UNLINK; 1323 req->type = ix;
1324 req->fh = newSVsv (oldpath);
1325 req->data2ptr = SvPVbyte_nolen (req->fh);
570 req->data = newSVsv (pathname); 1326 req->data = newSVsv (newpath);
571 req->dataptr = SvPV_nolen (req->data); 1327 req->dataptr = SvPVbyte_nolen (req->data);
572 req->callback = SvREFCNT_inc (callback);
573 1328
574 send_req (req); 1329 REQ_SEND;
575} 1330}
576 1331
577void 1332void
1333aio_busy (delay,callback=&PL_sv_undef)
1334 double delay
1335 SV * callback
1336 PPCODE:
1337{
1338 dREQ;
1339
1340 req->type = REQ_BUSY;
1341 req->fd = delay < 0. ? 0 : delay;
1342 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1343
1344 REQ_SEND;
1345}
1346
1347void
1348aio_group (callback=&PL_sv_undef)
1349 SV * callback
1350 PROTOTYPE: ;$
1351 PPCODE:
1352{
1353 dREQ;
1354
1355 req->type = REQ_GROUP;
1356 req_send (req);
1357
1358 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1359}
1360
1361void
1362aio_nop (callback=&PL_sv_undef)
1363 SV * callback
1364 PPCODE:
1365{
1366 dREQ;
1367
1368 req->type = REQ_NOP;
1369
1370 REQ_SEND;
1371}
1372
1373void
1374aioreq_pri (int pri = DEFAULT_PRI)
1375 CODE:
1376 if (pri < PRI_MIN) pri = PRI_MIN;
1377 if (pri > PRI_MAX) pri = PRI_MAX;
1378 next_pri = pri + PRI_BIAS;
1379
1380void
1381aioreq_nice (int nice = 0)
1382 CODE:
1383 nice = next_pri - nice;
1384 if (nice < PRI_MIN) nice = PRI_MIN;
1385 if (nice > PRI_MAX) nice = PRI_MAX;
1386 next_pri = nice + PRI_BIAS;
1387
1388void
578flush() 1389flush ()
579 PROTOTYPE: 1390 PROTOTYPE:
580 CODE: 1391 CODE:
581 while (nreqs) 1392 while (nreqs)
582 { 1393 {
583 poll_wait (); 1394 poll_wait ();
623 CODE: 1434 CODE:
624 RETVAL = nreqs; 1435 RETVAL = nreqs;
625 OUTPUT: 1436 OUTPUT:
626 RETVAL 1437 RETVAL
627 1438
1439PROTOTYPES: DISABLE
1440
1441MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1442
1443void
1444cancel (aio_req_ornot req)
1445 CODE:
1446 req_cancel (req);
1447
1448void
1449cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1450 CODE:
1451 SvREFCNT_dec (req->callback);
1452 req->callback = newSVsv (callback);
1453
1454MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1455
1456void
1457add (aio_req grp, ...)
1458 PPCODE:
1459{
1460 int i;
1461 aio_req req;
1462
1463 if (grp->fd == 2)
1464 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1465
1466 for (i = 1; i < items; ++i )
1467 {
1468 if (GIMME_V != G_VOID)
1469 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1470
1471 req = SvAIO_REQ (ST (i));
1472
1473 if (req)
1474 {
1475 ++grp->length;
1476 req->grp = grp;
1477
1478 req->grp_prev = 0;
1479 req->grp_next = grp->grp_first;
1480
1481 if (grp->grp_first)
1482 grp->grp_first->grp_prev = req;
1483
1484 grp->grp_first = req;
1485 }
1486 }
1487}
1488
1489void
1490cancel_subs (aio_req_ornot req)
1491 CODE:
1492 req_cancel_subs (req);
1493
1494void
1495result (aio_req grp, ...)
1496 CODE:
1497{
1498 int i;
1499 AV *av = newAV ();
1500
1501 for (i = 1; i < items; ++i )
1502 av_push (av, newSVsv (ST (i)));
1503
1504 SvREFCNT_dec (grp->data);
1505 grp->data = (SV *)av;
1506}
1507
1508void
1509limit (aio_req grp, int limit)
1510 CODE:
1511 grp->fd2 = limit;
1512 aio_grp_feed (grp);
1513
1514void
1515feed (aio_req grp, SV *callback=&PL_sv_undef)
1516 CODE:
1517{
1518 SvREFCNT_dec (grp->fh2);
1519 grp->fh2 = newSVsv (callback);
1520
1521 if (grp->fd2 <= 0)
1522 grp->fd2 = 2;
1523
1524 aio_grp_feed (grp);
1525}
1526

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