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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.1 by root, Sun Jul 10 17:07:44 2005 UTC vs.
Revision 1.72 by root, Tue Oct 24 17:22:17 2006 UTC

1#define PERL_NO_GET_CONTEXT 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>
2 11
3#include "EXTERN.h" 12#include "EXTERN.h"
4#include "perl.h" 13#include "perl.h"
5#include "XSUB.h" 14#include "XSUB.h"
6 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>
7#include <sys/types.h> 24#include <sys/types.h>
8#include <sys/stat.h> 25#include <sys/stat.h>
26#include <limits.h>
9#include <unistd.h> 27#include <unistd.h>
10#include <fcntl.h> 28#include <fcntl.h>
11#include <signal.h> 29#include <signal.h>
12#include <sched.h> 30#include <sched.h>
13#include <endian.h>
14 31
15#include <pthread.h> 32#if HAVE_SENDFILE
33# if __linux
34# include <sys/sendfile.h>
35# elif __freebsd
16#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
17 46
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 47/* used for struct dirent, AIX doesn't provide it */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 48#ifndef NAME_MAX
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 49# define NAME_MAX 4096
50#endif
21 51
22#if __i386 || __amd64
23# define STACKSIZE ( 256 * sizeof (long))
24#elif __ia64 52#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 53# define STACKSIZE 65536
54#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55# define STACKSIZE PTHREAD_STACK_MIN
26#else 56#else
27# define STACKSIZE ( 512 * sizeof (long)) 57# define STACKSIZE 16384
28#endif 58#endif
59
60/* buffer size for various temporary buffers */
61#define AIO_BUFSIZE 65536
62
63#define dBUF \
64 char *aio_buf; \
65 LOCK (wrklock); \
66 self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
67 UNLOCK (wrklock); \
68 if (!aio_buf) \
69 return -1;
29 70
30enum { 71enum {
31 REQ_QUIT, 72 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 73 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 74 REQ_READ, REQ_WRITE, REQ_READAHEAD,
75 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 76 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 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,
36}; 83};
37 84
85#define AIO_REQ_KLASS "IO::AIO::REQ"
86#define AIO_GRP_KLASS "IO::AIO::GRP"
87
38typedef struct aio_cb { 88typedef struct aio_cb
89{
39 struct aio_cb *next; 90 struct aio_cb *volatile next;
40 91
41 int type; 92 SV *data, *callback;
42 93 SV *fh, *fh2;
43 int fd; 94 void *dataptr, *data2ptr;
95 Stat_t *statdata;
44 off_t offset; 96 off_t offset;
45 size_t length; 97 size_t length;
46 ssize_t result; 98 ssize_t result;
99
100 STRLEN dataoffset;
101 int type;
102 int fd, fd2;
103 int errorno;
47 mode_t mode; /* open */ 104 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 105
53 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;
54} aio_cb; 111} aio_cb;
55 112
113enum {
114 FLAG_CANCELLED = 0x01,
115};
116
56typedef aio_cb *aio_req; 117typedef aio_cb *aio_req;
118typedef aio_cb *aio_req_ornot;
57 119
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
58static int started; 131static int started, wanted;
59static int nreqs; 132static volatile int nreqs;
133static int max_outstanding = 1<<30;
60static int reqpipe[2], respipe[2]; 134static int respipe [2];
61 135
62static aio_req qs, qe; /* queue start, queue end */ 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
63 141
64static void *aio_proc(void *arg); 142#define LOCK(mutex) pthread_mutex_lock (&(mutex))
143#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
65 144
66static void 145/* worker threasd management */
67start_thread (void) 146static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
68{ 147
69 sigset_t fullsigset, oldsigset; 148typedef struct worker {
149 /* locked by wrklock */
150 struct worker *prev, *next;
151
70 pthread_t tid; 152 pthread_t tid;
71 pthread_attr_t attr;
72 153
73 pthread_attr_init (&attr); 154 /* locked by reslock, reqlock or wrklock */
74 pthread_attr_setstacksize (&attr, STACKSIZE); 155 aio_req req; /* currently processed request */
75 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 156 void *dbuf;
157 DIR *dirp;
158} worker;
76 159
77 sigfillset (&fullsigset); 160static worker wrk_first = { &wrk_first, &wrk_first, 0 };
78 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79 161
80 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 162static void worker_clear (worker *wrk)
81 started++;
82
83 sigprocmask (SIG_SETMASK, &oldsigset, 0);
84}
85
86static void
87send_reqs (void)
88{ 163{
89 /* this write is atomic */ 164 if (wrk->dirp)
90 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
91 { 165 {
92 qs = qs->next; 166 closedir (wrk->dirp);
93 if (!qs) qe = 0; 167 wrk->dirp = 0;
94 } 168 }
95}
96 169
97static void 170 if (wrk->dbuf)
98send_req (aio_req req) 171 {
172 free (wrk->dbuf);
173 wrk->dbuf = 0;
174 }
175}
176
177static void worker_free (worker *wrk)
99{ 178{
100 nreqs++; 179 wrk->next->prev = wrk->prev;
180 wrk->prev->next = wrk->next;
181
182 free (wrk);
183}
184
185static pthread_mutex_t reslock = AIO_MUTEX_INIT;
186static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
187static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
188
189/*
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;
198
199static reqq req_queue;
200static reqq res_queue;
201
202int reqq_push (reqq *q, aio_req req)
203{
204 int pri = req->pri;
101 req->next = 0; 205 req->next = 0;
102 206
103 if (qe) 207 if (q->qe[pri])
104 { 208 {
105 qe->next = req; 209 q->qe[pri]->next = req;
106 qe = req; 210 q->qe[pri] = req;
107 } 211 }
108 else 212 else
109 qe = qs = req; 213 q->qe[pri] = q->qs[pri] = req;
110 214
111 send_reqs (); 215 return q->size++;
112} 216}
113 217
114static void 218aio_req reqq_shift (reqq *q)
115end_thread (void)
116{ 219{
117 aio_req req; 220 int pri;
118 New (0, req, 1, aio_cb);
119 req->type = REQ_QUIT;
120 221
121 send_req (req); 222 if (!q->size)
122} 223 return 0;
123 224
124static void 225 --q->size;
125read_write (pTHX_
126 int dowrite, int fd, off_t offset, size_t length,
127 SV *data, STRLEN dataoffset, SV *callback)
128{
129 aio_req req;
130 STRLEN svlen;
131 char *svptr = SvPV (data, svlen);
132 226
133 SvUPGRADE (data, SVt_PV); 227 for (pri = NUM_PRI; pri--; )
134 SvPOK_on (data);
135
136 if (dataoffset < 0)
137 dataoffset += svlen;
138
139 if (dataoffset < 0 || dataoffset > svlen)
140 croak ("data offset outside of string");
141
142 if (dowrite)
143 {
144 /* write: check length and adjust. */
145 if (length < 0 || length + dataoffset > svlen)
146 length = svlen - dataoffset;
147 } 228 {
148 else 229 aio_req req = q->qs[pri];
149 {
150 /* read: grow scalar as necessary */
151 svptr = SvGROW (data, length + dataoffset);
152 }
153 230
154 if (length < 0)
155 croak ("length must not be negative");
156
157 Newz (0, req, 1, aio_cb);
158
159 if (!req) 231 if (req)
160 croak ("out of memory during aio_req allocation"); 232 {
233 if (!(q->qs[pri] = req->next))
234 q->qe[pri] = 0;
161 235
162 req->type = dowrite ? REQ_WRITE : REQ_READ; 236 return req;
163 req->fd = fd; 237 }
164 req->offset = offset; 238 }
165 req->length = length;
166 req->data = SvREFCNT_inc (data);
167 req->dataptr = (char *)svptr + dataoffset;
168 req->callback = SvREFCNT_inc (callback);
169 239
170 send_req (req); 240 abort ();
171} 241}
172 242
173static void 243static void req_invoke (aio_req req);
174poll_wait () 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{
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 ()
175{ 318{
176 fd_set rfd; 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
177 FD_ZERO(&rfd); 335 FD_ZERO(&rfd);
178 FD_SET(respipe[0], &rfd); 336 FD_SET(respipe [0], &rfd);
179 337
180 select (respipe[0] + 1, &rfd, 0, 0, 0); 338 select (respipe [0] + 1, &rfd, 0, 0, 0);
339 }
181} 340}
182 341
183static int 342static void req_invoke (aio_req req)
184poll_cb (pTHX) 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)
479 return;
480
481 SvREFCNT_dec (grp->fh2);
482 grp->fh2 = 0;
483
484 for (sub = grp->grp_first; sub; sub = sub->grp_next)
485 req_cancel (sub);
486}
487
488static void req_cancel (aio_req req)
489{
490 req->flags |= FLAG_CANCELLED;
491
492 req_cancel_subs (req);
493}
494
495static int poll_cb ()
185{ 496{
186 dSP; 497 dSP;
187 int count = 0; 498 int count = 0;
499 int do_croak = 0;
188 aio_req req; 500 aio_req req;
189 501
190 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 502 for (;;)
191 { 503 {
504 LOCK (reslock);
505 req = reqq_shift (&res_queue);
506
507 if (req)
508 {
509 if (!res_queue.size)
510 {
511 /* read any signals sent by the worker threads */
512 char buf [32];
513 while (read (respipe [0], buf, 32) == 32)
514 ;
515 }
516 }
517
518 UNLOCK (reslock);
519
520 if (!req)
521 break;
522
192 nreqs--; 523 --nreqs;
193 524
194 if (req->type == REQ_QUIT) 525 if (req->type == REQ_QUIT)
195 started--; 526 started--;
527 else if (req->type == REQ_GROUP && req->length)
528 {
529 req->fd = 1; /* mark request as delayed */
530 continue;
531 }
196 else 532 else
197 { 533 {
198 int errorno = errno;
199 errno = req->errorno;
200
201 if (req->type == REQ_READ) 534 if (req->type == REQ_READ)
202 SvCUR_set (req->data, req->dataoffset 535 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
203 + req->result > 0 ? req->result : 0);
204 536
537 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538 SvREADONLY_off (req->data);
539
205 if (req->data) 540 if (req->statdata)
206 SvREFCNT_dec (req->data);
207
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209 { 541 {
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 542 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211 PL_laststatval = req->result; 543 PL_laststatval = req->result;
212 PL_statcache = *(req->statdata); 544 PL_statcache = *(req->statdata);
213
214 Safefree (req->statdata);
215 } 545 }
216 546
217 PUSHMARK (SP); 547 req_invoke (req);
218 XPUSHs (sv_2mortal (newSViv (req->result)));
219 PUTBACK;
220 call_sv (req->callback, G_VOID);
221 SPAGAIN;
222
223 if (req->callback)
224 SvREFCNT_dec (req->callback);
225 548
226 errno = errorno;
227 count++; 549 count++;
228 } 550 }
229 551
230 Safefree (req); 552 req_free (req);
231 } 553 }
232
233 if (qs)
234 send_reqs ();
235 554
236 return count; 555 return count;
237} 556}
238 557
239static void * 558static void *aio_proc(void *arg);
240aio_proc (void *thr_arg) 559
560static void start_thread (void)
561{
562 worker *wrk = calloc (1, sizeof (worker));
563
564 if (!wrk)
565 croak ("unable to allocate worker thread data");
566
567 sigset_t fullsigset, oldsigset;
568 pthread_attr_t attr;
569
570 pthread_attr_init (&attr);
571 pthread_attr_setstacksize (&attr, STACKSIZE);
572 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574 sigfillset (&fullsigset);
575
576 LOCK (wrklock);
577 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578
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;
585 started++;
586 }
587 else
588 free (wrk);
589
590 sigprocmask (SIG_SETMASK, &oldsigset, 0);
591 UNLOCK (wrklock);
592}
593
594static void req_send (aio_req req)
595{
596 while (started < wanted && nreqs >= started)
597 start_thread ();
598
599 ++nreqs;
600
601 LOCK (reqlock);
602 reqq_push (&req_queue, req);
603 pthread_cond_signal (&reqwait);
604 UNLOCK (reqlock);
605
606 if (nreqs > max_outstanding)
607 for (;;)
608 {
609 poll_cb ();
610
611 if (nreqs <= max_outstanding)
612 break;
613
614 poll_wait ();
615 }
616}
617
618static void end_thread (void)
241{ 619{
242 aio_req req; 620 aio_req req;
243 621
244 /* then loop */ 622 Newz (0, req, 1, aio_cb);
245 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 623
624 req->type = REQ_QUIT;
625 req->pri = PRI_MAX + PRI_BIAS;
626
627 req_send (req);
628}
629
630static void min_parallel (int nthreads)
631{
632 if (wanted < nthreads)
633 wanted = nthreads;
634}
635
636static void max_parallel (int nthreads)
637{
638 int cur = started;
639
640 if (wanted > nthreads)
641 wanted = nthreads;
642
643 while (cur > wanted)
644 {
645 end_thread ();
646 cur--;
647 }
648
649 while (started > wanted)
650 {
651 poll_wait ();
652 poll_cb ();
653 }
654}
655
656static void create_pipe ()
657{
658 if (pipe (respipe))
659 croak ("unable to initialize result pipe");
660
661 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
662 croak ("cannot set result pipe to nonblocking mode");
663
664 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
665 croak ("cannot set result pipe to nonblocking mode");
666}
667
668/*****************************************************************************/
669/* work around various missing functions */
670
671#if !HAVE_PREADWRITE
672# define pread aio_pread
673# define pwrite aio_pwrite
674
675/*
676 * make our pread/pwrite safe against themselves, but not against
677 * normal read/write by using a mutex. slows down execution a lot,
678 * but that's your problem, not mine.
679 */
680static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
681
682static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
683{
684 ssize_t res;
685 off_t ooffset;
686
687 LOCK (preadwritelock);
688 ooffset = lseek (fd, 0, SEEK_CUR);
689 lseek (fd, offset, SEEK_SET);
690 res = read (fd, buf, count);
691 lseek (fd, ooffset, SEEK_SET);
692 UNLOCK (preadwritelock);
693
694 return res;
695}
696
697static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
698{
699 ssize_t res;
700 off_t ooffset;
701
702 LOCK (preadwritelock);
703 ooffset = lseek (fd, 0, SEEK_CUR);
704 lseek (fd, offset, SEEK_SET);
705 res = write (fd, buf, count);
706 lseek (fd, offset, SEEK_SET);
707 UNLOCK (preadwritelock);
708
709 return res;
710}
711#endif
712
713#if !HAVE_FDATASYNC
714# define fdatasync fsync
715#endif
716
717#if !HAVE_READAHEAD
718# define readahead aio_readahead
719
720static ssize_t readahead (int fd, off_t offset, size_t count)
721{
722 dBUF;
723
724 while (count > 0)
725 {
726 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
727
728 pread (fd, aio_buf, len, offset);
729 offset += len;
730 count -= len;
731 }
732
733 errno = 0;
734}
735#endif
736
737#if !HAVE_READDIR_R
738# define readdir_r aio_readdir_r
739
740static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
741
742static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
743{
744 struct dirent *e;
745 int errorno;
746
747 LOCK (readdirlock);
748
749 e = readdir (dirp);
750 errorno = errno;
751
752 if (e)
753 {
754 *res = ent;
755 strcpy (ent->d_name, e->d_name);
756 }
757 else
758 *res = 0;
759
760 UNLOCK (readdirlock);
761
762 errno = errorno;
763 return e ? 0 : -1;
764}
765#endif
766
767/* sendfile always needs emulation */
768static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
769{
770 ssize_t res;
771
772 if (!count)
773 return 0;
774
775#if HAVE_SENDFILE
776# if __linux
777 res = sendfile (ofd, ifd, &offset, count);
778
779# elif __freebsd
780 /*
781 * Of course, the freebsd sendfile is a dire hack with no thoughts
782 * wasted on making it similar to other I/O functions.
783 */
784 {
785 off_t sbytes;
786 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
787
788 if (res < 0 && sbytes)
789 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
790 res = sbytes;
791 }
792
793# elif __hpux
794 res = sendfile (ofd, ifd, offset, count, 0, 0);
795
796# elif __solaris
797 {
798 struct sendfilevec vec;
799 size_t sbytes;
800
801 vec.sfv_fd = ifd;
802 vec.sfv_flag = 0;
803 vec.sfv_off = offset;
804 vec.sfv_len = count;
805
806 res = sendfilev (ofd, &vec, 1, &sbytes);
807
808 if (res < 0 && sbytes)
809 res = sbytes;
810 }
811
812# endif
813#else
814 res = -1;
815 errno = ENOSYS;
816#endif
817
818 if (res < 0
819 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
820#if __solaris
821 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
822#endif
823 )
824 )
825 {
826 /* emulate sendfile. this is a major pain in the ass */
827 dBUF;
828
829 res = 0;
830
831 while (count)
832 {
833 ssize_t cnt;
834
835 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
836
837 if (cnt <= 0)
838 {
839 if (cnt && !res) res = -1;
840 break;
841 }
842
843 cnt = write (ofd, aio_buf, cnt);
844
845 if (cnt <= 0)
846 {
847 if (cnt && !res) res = -1;
848 break;
849 }
850
851 offset += cnt;
852 res += cnt;
853 count -= cnt;
854 }
855 }
856
857 return res;
858}
859
860/* read a full directory */
861static void scandir_ (aio_req req, worker *self)
862{
863 DIR *dirp;
864 union
865 {
866 struct dirent d;
867 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
868 } *u;
869 struct dirent *entp;
870 char *name, *names;
871 int memlen = 4096;
872 int memofs = 0;
873 int res = 0;
874 int errorno;
875
876 LOCK (wrklock);
877 self->dirp = dirp = opendir (req->dataptr);
878 self->dbuf = u = malloc (sizeof (*u));
879 UNLOCK (wrklock);
880
881 req->data2ptr = names = malloc (memlen);
882
883 if (dirp && u && names)
884 for (;;)
246 { 885 {
886 errno = 0;
887 readdir_r (dirp, &u->d, &entp);
888
889 if (!entp)
890 break;
891
892 name = entp->d_name;
893
894 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
895 {
896 int len = strlen (name) + 1;
897
898 res++;
899
900 while (memofs + len > memlen)
901 {
902 memlen *= 2;
903 LOCK (wrklock);
904 req->data2ptr = names = realloc (names, memlen);
905 UNLOCK (wrklock);
906
907 if (!names)
908 break;
909 }
910
911 memcpy (names + memofs, name, len);
912 memofs += len;
913 }
914 }
915
916 if (errno)
917 res = -1;
918
919 req->result = res;
920}
921
922/*****************************************************************************/
923
924static void *aio_proc (void *thr_arg)
925{
926 aio_req req;
927 int type;
928 worker *self = (worker *)thr_arg;
929
930 do
931 {
932 LOCK (reqlock);
933
934 for (;;)
935 {
936 self->req = req = reqq_shift (&req_queue);
937
938 if (req)
939 break;
940
941 pthread_cond_wait (&reqwait, &reqlock);
942 }
943
944 UNLOCK (reqlock);
945
247 errno = 0; /* strictly unnecessary */ 946 errno = 0; /* strictly unnecessary */
947 type = req->type; /* remember type for QUIT check */
248 948
949 if (!(req->flags & FLAG_CANCELLED))
249 switch (req->type) 950 switch (type)
250 { 951 {
251 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 952 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
252 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 953 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
253#if SYS_readahead 954
254 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 955 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
255#else 956 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
256 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
257#endif
258 957
259 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 958 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
260 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 959 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
261 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 960 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
262 961
263 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 962 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
264 case REQ_CLOSE: req->result = close (req->fd); break; 963 case REQ_CLOSE: req->result = close (req->fd); break;
265 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 964 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
266
267 case REQ_FSYNC: req->result = fsync (req->fd); break; 965 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
966 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
967 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
968 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
969
268 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 970 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
971 case REQ_FSYNC: req->result = fsync (req->fd); break;
972 case REQ_READDIR: scandir_ (req, self); break;
269 973
974 case REQ_BUSY:
975 {
976 struct timeval tv;
977
978 tv.tv_sec = req->fd;
979 tv.tv_usec = req->fd2;
980
981 req->result = select (0, 0, 0, 0, &tv);
982 }
983
984 case REQ_GROUP:
985 case REQ_NOP:
270 case REQ_QUIT: 986 case REQ_QUIT:
271 write (respipe[1], (void *)&req, sizeof (req)); 987 break;
272 return 0;
273 988
274 default: 989 default:
275 req->result = ENOSYS; 990 req->result = ENOSYS;
276 break; 991 break;
277 } 992 }
278 993
279 req->errorno = errno; 994 req->errorno = errno;
280 write (respipe[1], (void *)&req, sizeof (req)); 995
996 LOCK (reslock);
997
998 if (!reqq_push (&res_queue, req))
999 /* write a dummy byte to the pipe so fh becomes ready */
1000 write (respipe [1], &respipe, 1);
1001
1002 self->req = 0;
1003 worker_clear (self);
1004
1005 UNLOCK (reslock);
281 } 1006 }
1007 while (type != REQ_QUIT);
1008
1009 LOCK (wrklock);
1010 worker_free (self);
1011 UNLOCK (wrklock);
282 1012
283 return 0; 1013 return 0;
284} 1014}
285 1015
1016/*****************************************************************************/
1017
1018static void atfork_prepare (void)
1019{
1020 LOCK (wrklock);
1021 LOCK (reqlock);
1022 LOCK (reslock);
1023#if !HAVE_PREADWRITE
1024 LOCK (preadwritelock);
1025#endif
1026#if !HAVE_READDIR_R
1027 LOCK (readdirlock);
1028#endif
1029}
1030
1031static void atfork_parent (void)
1032{
1033#if !HAVE_READDIR_R
1034 UNLOCK (readdirlock);
1035#endif
1036#if !HAVE_PREADWRITE
1037 UNLOCK (preadwritelock);
1038#endif
1039 UNLOCK (reslock);
1040 UNLOCK (reqlock);
1041 UNLOCK (wrklock);
1042}
1043
1044static void atfork_child (void)
1045{
1046 aio_req prv;
1047
1048 while (prv = reqq_shift (&req_queue))
1049 req_free (prv);
1050
1051 while (prv = reqq_shift (&res_queue))
1052 req_free (prv);
1053
1054 while (wrk_first.next != &wrk_first)
1055 {
1056 worker *wrk = wrk_first.next;
1057
1058 if (wrk->req)
1059 req_free (wrk->req);
1060
1061 worker_clear (wrk);
1062 worker_free (wrk);
1063 }
1064
1065 started = 0;
1066 nreqs = 0;
1067
1068 close (respipe [0]);
1069 close (respipe [1]);
1070 create_pipe ();
1071
1072 atfork_parent ();
1073}
1074
1075#define dREQ \
1076 aio_req req; \
1077 int req_pri = next_pri; \
1078 next_pri = DEFAULT_PRI + PRI_BIAS; \
1079 \
1080 if (SvOK (callback) && !SvROK (callback)) \
1081 croak ("callback must be undef or of reference type"); \
1082 \
1083 Newz (0, req, 1, aio_cb); \
1084 if (!req) \
1085 croak ("out of memory during aio_req allocation"); \
1086 \
1087 req->callback = newSVsv (callback); \
1088 req->pri = req_pri
1089
1090#define REQ_SEND \
1091 req_send (req); \
1092 \
1093 if (GIMME_V != G_VOID) \
1094 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1095
286MODULE = IO::AIO PACKAGE = IO::AIO 1096MODULE = IO::AIO PACKAGE = IO::AIO
287 1097
1098PROTOTYPES: ENABLE
1099
288BOOT: 1100BOOT:
289{ 1101{
290 if (pipe (reqpipe) || pipe (respipe)) 1102 HV *stash = gv_stashpv ("IO::AIO", 1);
291 croak ("unable to initialize request or result pipe"); 1103 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1104 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1105 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
292 1106
293 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) 1107 create_pipe ();
294 croak ("cannot set result pipe to nonblocking mode"); 1108 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
295
296 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
297 croak ("cannot set result pipe to nonblocking mode");
298} 1109}
299 1110
300void 1111void
301min_parallel(nthreads) 1112min_parallel (nthreads)
302 int nthreads 1113 int nthreads
303 PROTOTYPE: $ 1114 PROTOTYPE: $
304 CODE:
305 while (nthreads > started)
306 start_thread ();
307 1115
308void 1116void
309max_parallel(nthreads) 1117max_parallel (nthreads)
310 int nthreads 1118 int nthreads
311 PROTOTYPE: $ 1119 PROTOTYPE: $
1120
1121int
1122max_outstanding (nreqs)
1123 int nreqs
1124 PROTOTYPE: $
312 CODE: 1125 CODE:
313{ 1126 RETVAL = max_outstanding;
314 int cur = started; 1127 max_outstanding = nreqs;
315 while (cur > nthreads)
316 {
317 end_thread ();
318 cur--;
319 }
320 1128
321 while (started > nthreads)
322 {
323 poll_wait ();
324 poll_cb (aTHX);
325 }
326}
327
328void 1129void
329aio_open(pathname,flags,mode,callback) 1130aio_open (pathname,flags,mode,callback=&PL_sv_undef)
330 SV * pathname 1131 SV * pathname
331 int flags 1132 int flags
332 int mode 1133 int mode
333 SV * callback 1134 SV * callback
334 PROTOTYPE: $$$$ 1135 PROTOTYPE: $$$;$
335 CODE: 1136 PPCODE:
336{ 1137{
337 aio_req req; 1138 dREQ;
338
339 Newz (0, req, 1, aio_cb);
340
341 if (!req)
342 croak ("out of memory during aio_req allocation");
343 1139
344 req->type = REQ_OPEN; 1140 req->type = REQ_OPEN;
345 req->data = newSVsv (pathname); 1141 req->data = newSVsv (pathname);
346 req->dataptr = SvPV_nolen (req->data); 1142 req->dataptr = SvPVbyte_nolen (req->data);
347 req->fd = flags; 1143 req->fd = flags;
348 req->mode = mode; 1144 req->mode = mode;
349 req->callback = SvREFCNT_inc (callback);
350 1145
351 send_req (req); 1146 REQ_SEND;
352} 1147}
353 1148
354void 1149void
355aio_close(fh,callback) 1150aio_close (fh,callback=&PL_sv_undef)
356 InputStream fh 1151 SV * fh
357 SV * callback 1152 SV * callback
358 PROTOTYPE: $$ 1153 PROTOTYPE: $;$
359 ALIAS: 1154 ALIAS:
360 aio_close = REQ_CLOSE 1155 aio_close = REQ_CLOSE
361 aio_fsync = REQ_FSYNC 1156 aio_fsync = REQ_FSYNC
362 aio_fdatasync = REQ_FDATASYNC 1157 aio_fdatasync = REQ_FDATASYNC
363 CODE: 1158 PPCODE:
1159{
1160 dREQ;
1161
1162 req->type = ix;
1163 req->fh = newSVsv (fh);
1164 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1165
1166 REQ_SEND (req);
1167}
1168
1169void
1170aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1171 SV * fh
1172 UV offset
1173 UV length
1174 SV * data
1175 UV dataoffset
1176 SV * callback
1177 ALIAS:
1178 aio_read = REQ_READ
1179 aio_write = REQ_WRITE
1180 PROTOTYPE: $$$$$;$
1181 PPCODE:
364{ 1182{
365 aio_req req; 1183 aio_req req;
1184 STRLEN svlen;
1185 char *svptr = SvPVbyte (data, svlen);
366 1186
367 Newz (0, req, 1, aio_cb); 1187 SvUPGRADE (data, SVt_PV);
1188 SvPOK_on (data);
368 1189
369 if (!req) 1190 if (dataoffset < 0)
370 croak ("out of memory during aio_req allocation"); 1191 dataoffset += svlen;
371 1192
372 req->type = ix; 1193 if (dataoffset < 0 || dataoffset > svlen)
373 req->fd = PerlIO_fileno (fh); 1194 croak ("data offset outside of string");
374 req->callback = SvREFCNT_inc (callback);
375 1195
376 send_req (req); 1196 if (ix == REQ_WRITE)
377} 1197 {
378 1198 /* write: check length and adjust. */
379void 1199 if (length < 0 || length + dataoffset > svlen)
380aio_read(fh,offset,length,data,dataoffset,callback) 1200 length = svlen - dataoffset;
381 InputStream fh 1201 }
382 UV offset 1202 else
383 IV length 1203 {
384 SV * data 1204 /* read: grow scalar as necessary */
385 IV dataoffset 1205 svptr = SvGROW (data, length + dataoffset);
386 SV * callback 1206 }
387 PROTOTYPE: $$$$$$
388 CODE:
389 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
390
391void
392aio_write(fh,offset,length,data,dataoffset,callback)
393 OutputStream fh
394 UV offset
395 IV length
396 SV * data
397 IV dataoffset
398 SV * callback
399 PROTOTYPE: $$$$$$
400 CODE:
401 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
402
403void
404aio_readahead(fh,offset,length,callback)
405 InputStream fh
406 UV offset
407 IV length
408 SV * callback
409 PROTOTYPE: $$$$
410 CODE:
411{
412 aio_req req;
413 1207
414 if (length < 0) 1208 if (length < 0)
415 croak ("length must not be negative"); 1209 croak ("length must not be negative");
416 1210
417 Newz (0, req, 1, aio_cb); 1211 {
1212 dREQ;
418 1213
419 if (!req) 1214 req->type = ix;
420 croak ("out of memory during aio_req allocation"); 1215 req->fh = newSVsv (fh);
1216 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1217 : IoOFP (sv_2io (fh)));
1218 req->offset = offset;
1219 req->length = length;
1220 req->data = SvREFCNT_inc (data);
1221 req->dataptr = (char *)svptr + dataoffset;
1222
1223 if (!SvREADONLY (data))
1224 {
1225 SvREADONLY_on (data);
1226 req->data2ptr = (void *)data;
1227 }
1228
1229 REQ_SEND;
1230 }
1231}
1232
1233void
1234aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1235 SV * out_fh
1236 SV * in_fh
1237 UV in_offset
1238 UV length
1239 SV * callback
1240 PROTOTYPE: $$$$;$
1241 PPCODE:
1242{
1243 dREQ;
1244
1245 req->type = REQ_SENDFILE;
1246 req->fh = newSVsv (out_fh);
1247 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1248 req->fh2 = newSVsv (in_fh);
1249 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1250 req->offset = in_offset;
1251 req->length = length;
1252
1253 REQ_SEND;
1254}
1255
1256void
1257aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1258 SV * fh
1259 UV offset
1260 IV length
1261 SV * callback
1262 PROTOTYPE: $$$;$
1263 PPCODE:
1264{
1265 dREQ;
421 1266
422 req->type = REQ_READAHEAD; 1267 req->type = REQ_READAHEAD;
1268 req->fh = newSVsv (fh);
423 req->fd = PerlIO_fileno (fh); 1269 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
424 req->offset = offset; 1270 req->offset = offset;
425 req->length = length; 1271 req->length = length;
426 req->callback = SvREFCNT_inc (callback);
427 1272
428 send_req (req); 1273 REQ_SEND;
429} 1274}
430 1275
431void 1276void
432aio_stat(fh_or_path,callback) 1277aio_stat (fh_or_path,callback=&PL_sv_undef)
433 SV * fh_or_path 1278 SV * fh_or_path
434 SV * callback 1279 SV * callback
435 PROTOTYPE: $$
436 ALIAS: 1280 ALIAS:
1281 aio_stat = REQ_STAT
437 aio_lstat = 1 1282 aio_lstat = REQ_LSTAT
438 CODE: 1283 PPCODE:
439{ 1284{
440 aio_req req; 1285 dREQ;
441
442 Newz (0, req, 1, aio_cb);
443
444 if (!req)
445 croak ("out of memory during aio_req allocation");
446 1286
447 New (0, req->statdata, 1, Stat_t); 1287 New (0, req->statdata, 1, Stat_t);
448
449 if (!req->statdata) 1288 if (!req->statdata)
1289 {
1290 req_free (req);
450 croak ("out of memory during aio_req->statdata allocation"); 1291 croak ("out of memory during aio_req->statdata allocation");
1292 }
451 1293
452 if (SvPOK (fh_or_path)) 1294 if (SvPOK (fh_or_path))
453 { 1295 {
454 req->type = ix ? REQ_LSTAT : REQ_STAT; 1296 req->type = ix;
455 req->data = newSVsv (fh_or_path); 1297 req->data = newSVsv (fh_or_path);
456 req->dataptr = SvPV_nolen (req->data); 1298 req->dataptr = SvPVbyte_nolen (req->data);
457 } 1299 }
458 else 1300 else
459 { 1301 {
460 req->type = REQ_FSTAT; 1302 req->type = REQ_FSTAT;
1303 req->fh = newSVsv (fh_or_path);
461 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1304 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
462 } 1305 }
463 1306
464 req->callback = SvREFCNT_inc (callback); 1307 REQ_SEND;
465
466 send_req (req);
467} 1308}
468 1309
469void 1310void
470aio_unlink(pathname,callback) 1311aio_unlink (pathname,callback=&PL_sv_undef)
471 SV * pathname 1312 SV * pathname
472 SV * callback 1313 SV * callback
1314 ALIAS:
1315 aio_unlink = REQ_UNLINK
1316 aio_rmdir = REQ_RMDIR
1317 aio_readdir = REQ_READDIR
1318 PPCODE:
1319{
1320 dREQ;
1321
1322 req->type = ix;
1323 req->data = newSVsv (pathname);
1324 req->dataptr = SvPVbyte_nolen (req->data);
1325
1326 REQ_SEND;
1327}
1328
1329void
1330aio_link (oldpath,newpath,callback=&PL_sv_undef)
1331 SV * oldpath
1332 SV * newpath
1333 SV * callback
1334 ALIAS:
1335 aio_link = REQ_LINK
1336 aio_symlink = REQ_SYMLINK
1337 aio_rename = REQ_RENAME
1338 PPCODE:
1339{
1340 dREQ;
1341
1342 req->type = ix;
1343 req->fh = newSVsv (oldpath);
1344 req->data2ptr = SvPVbyte_nolen (req->fh);
1345 req->data = newSVsv (newpath);
1346 req->dataptr = SvPVbyte_nolen (req->data);
1347
1348 REQ_SEND;
1349}
1350
1351void
1352aio_busy (delay,callback=&PL_sv_undef)
1353 double delay
1354 SV * callback
1355 PPCODE:
1356{
1357 dREQ;
1358
1359 req->type = REQ_BUSY;
1360 req->fd = delay < 0. ? 0 : delay;
1361 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1362
1363 REQ_SEND;
1364}
1365
1366void
1367aio_group (callback=&PL_sv_undef)
1368 SV * callback
473 PROTOTYPE: $$ 1369 PROTOTYPE: ;$
1370 PPCODE:
1371{
1372 dREQ;
1373
1374 req->type = REQ_GROUP;
1375 req_send (req);
1376
1377 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1378}
1379
1380void
1381aio_nop (callback=&PL_sv_undef)
1382 SV * callback
1383 PPCODE:
1384{
1385 dREQ;
1386
1387 req->type = REQ_NOP;
1388
1389 REQ_SEND;
1390}
1391
1392void
1393aioreq_pri (int pri = DEFAULT_PRI)
1394 CODE:
1395 if (pri < PRI_MIN) pri = PRI_MIN;
1396 if (pri > PRI_MAX) pri = PRI_MAX;
1397 next_pri = pri + PRI_BIAS;
1398
1399void
1400aioreq_nice (int nice = 0)
1401 CODE:
1402 nice = next_pri - nice;
1403 if (nice < PRI_MIN) nice = PRI_MIN;
1404 if (nice > PRI_MAX) nice = PRI_MAX;
1405 next_pri = nice + PRI_BIAS;
1406
1407void
1408flush ()
1409 PROTOTYPE:
474 CODE: 1410 CODE:
475{ 1411 while (nreqs)
476 aio_req req; 1412 {
477 1413 poll_wait ();
478 Newz (0, req, 1, aio_cb); 1414 poll_cb ();
479 1415 }
480 if (!req) 1416
481 croak ("out of memory during aio_req allocation"); 1417void
482 1418poll()
483 req->type = REQ_UNLINK; 1419 PROTOTYPE:
484 req->data = newSVsv (pathname); 1420 CODE:
485 req->dataptr = SvPV_nolen (req->data); 1421 if (nreqs)
486 req->callback = SvREFCNT_inc (callback); 1422 {
487 1423 poll_wait ();
488 send_req (req); 1424 poll_cb ();
489} 1425 }
490 1426
491int 1427int
492poll_fileno() 1428poll_fileno()
493 PROTOTYPE: 1429 PROTOTYPE:
494 CODE: 1430 CODE:
495 RETVAL = respipe[0]; 1431 RETVAL = respipe [0];
496 OUTPUT: 1432 OUTPUT:
497 RETVAL 1433 RETVAL
498 1434
499int 1435int
500poll_cb(...) 1436poll_cb(...)
501 PROTOTYPE: 1437 PROTOTYPE:
502 CODE: 1438 CODE:
503 RETVAL = poll_cb (aTHX); 1439 RETVAL = poll_cb ();
504 OUTPUT: 1440 OUTPUT:
505 RETVAL 1441 RETVAL
506 1442
507void 1443void
508poll_wait() 1444poll_wait()
509 PROTOTYPE: 1445 PROTOTYPE:
510 CODE: 1446 CODE:
1447 if (nreqs)
511 poll_wait (); 1448 poll_wait ();
512 1449
513int 1450int
514nreqs() 1451nreqs()
515 PROTOTYPE: 1452 PROTOTYPE:
516 CODE: 1453 CODE:
517 RETVAL = nreqs; 1454 RETVAL = nreqs;
518 OUTPUT: 1455 OUTPUT:
519 RETVAL 1456 RETVAL
520 1457
1458PROTOTYPES: DISABLE
1459
1460MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1461
1462void
1463cancel (aio_req_ornot req)
1464 CODE:
1465 req_cancel (req);
1466
1467void
1468cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1469 CODE:
1470 SvREFCNT_dec (req->callback);
1471 req->callback = newSVsv (callback);
1472
1473MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1474
1475void
1476add (aio_req grp, ...)
1477 PPCODE:
1478{
1479 int i;
1480 aio_req req;
1481
1482 if (grp->fd == 2)
1483 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1484
1485 for (i = 1; i < items; ++i )
1486 {
1487 if (GIMME_V != G_VOID)
1488 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1489
1490 req = SvAIO_REQ (ST (i));
1491
1492 if (req)
1493 {
1494 ++grp->length;
1495 req->grp = grp;
1496
1497 req->grp_prev = 0;
1498 req->grp_next = grp->grp_first;
1499
1500 if (grp->grp_first)
1501 grp->grp_first->grp_prev = req;
1502
1503 grp->grp_first = req;
1504 }
1505 }
1506}
1507
1508void
1509cancel_subs (aio_req_ornot req)
1510 CODE:
1511 req_cancel_subs (req);
1512
1513void
1514result (aio_req grp, ...)
1515 CODE:
1516{
1517 int i;
1518 AV *av = newAV ();
1519
1520 for (i = 1; i < items; ++i )
1521 av_push (av, newSVsv (ST (i)));
1522
1523 SvREFCNT_dec (grp->data);
1524 grp->data = (SV *)av;
1525}
1526
1527void
1528limit (aio_req grp, int limit)
1529 CODE:
1530 grp->fd2 = limit;
1531 aio_grp_feed (grp);
1532
1533void
1534feed (aio_req grp, SV *callback=&PL_sv_undef)
1535 CODE:
1536{
1537 SvREFCNT_dec (grp->fh2);
1538 grp->fh2 = newSVsv (callback);
1539
1540 if (grp->fd2 <= 0)
1541 grp->fd2 = 2;
1542
1543 aio_grp_feed (grp);
1544}
1545

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