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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 1.74 by root, Wed Oct 25 17:57:30 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;
60static int reqpipe[2], respipe[2]; 133static int respipe [2];
61 134
62static aio_req qs, qe; /* queue start, queue end */ 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
63 140
64static void *aio_proc(void *arg); 141#define LOCK(mutex) pthread_mutex_lock (&(mutex))
142#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
65 143
66static void 144/* worker threasd management */
67start_thread (void) 145static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
68{ 146
69 sigset_t fullsigset, oldsigset; 147typedef struct worker {
148 /* locked by wrklock */
149 struct worker *prev, *next;
150
70 pthread_t tid; 151 pthread_t tid;
71 pthread_attr_t attr;
72 152
73 pthread_attr_init (&attr); 153 /* locked by reslock, reqlock or wrklock */
74 pthread_attr_setstacksize (&attr, STACKSIZE); 154 aio_req req; /* currently processed request */
75 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED); 155 void *dbuf;
156 DIR *dirp;
157} worker;
76 158
77 sigfillset (&fullsigset); 159static worker wrk_first = { &wrk_first, &wrk_first, 0 };
78 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79 160
80 if (pthread_create (&tid, &attr, aio_proc, 0) == 0) 161static void worker_clear (worker *wrk)
81 started++;
82
83 sigprocmask (SIG_SETMASK, &oldsigset, 0);
84}
85
86static void
87send_reqs (void)
88{ 162{
89 /* this write is atomic */ 163 if (wrk->dirp)
90 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
91 { 164 {
92 qs = qs->next; 165 closedir (wrk->dirp);
93 if (!qs) qe = 0; 166 wrk->dirp = 0;
94 } 167 }
95}
96 168
97static void 169 if (wrk->dbuf)
98send_req (aio_req req) 170 {
171 free (wrk->dbuf);
172 wrk->dbuf = 0;
173 }
174}
175
176static void worker_free (worker *wrk)
99{ 177{
100 nreqs++; 178 wrk->next->prev = wrk->prev;
179 wrk->prev->next = wrk->next;
180
181 free (wrk);
182}
183
184static pthread_mutex_t reslock = AIO_MUTEX_INIT;
185static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
186static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
187
188/*
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;
197
198static reqq req_queue;
199static reqq res_queue;
200
201int reqq_push (reqq *q, aio_req req)
202{
203 int pri = req->pri;
101 req->next = 0; 204 req->next = 0;
102 205
103 if (qe) 206 if (q->qe[pri])
104 { 207 {
105 qe->next = req; 208 q->qe[pri]->next = req;
106 qe = req; 209 q->qe[pri] = req;
107 } 210 }
108 else 211 else
109 qe = qs = req; 212 q->qe[pri] = q->qs[pri] = req;
110 213
111 send_reqs (); 214 return q->size++;
112} 215}
113 216
114static void 217aio_req reqq_shift (reqq *q)
115end_thread (void)
116{ 218{
117 aio_req req; 219 int pri;
118 New (0, req, 1, aio_cb);
119 req->type = REQ_QUIT;
120 220
121 send_req (req); 221 if (!q->size)
122} 222 return 0;
123 223
124static void 224 --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);
132 225
133 SvUPGRADE (data, SVt_PV); 226 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 } 227 {
148 else 228 aio_req req = q->qs[pri];
149 {
150 /* read: grow scalar as necessary */
151 svptr = SvGROW (data, length + dataoffset);
152 }
153 229
154 if (length < 0)
155 croak ("length must not be negative");
156
157 Newz (0, req, 1, aio_cb);
158
159 if (!req) 230 if (req)
160 croak ("out of memory during aio_req allocation"); 231 {
232 if (!(q->qs[pri] = req->next))
233 q->qe[pri] = 0;
161 234
162 req->type = dowrite ? REQ_WRITE : REQ_READ; 235 return req;
163 req->fd = fd; 236 }
164 req->offset = offset; 237 }
165 req->length = length;
166 req->data = SvREFCNT_inc (data);
167 req->dataptr = (char *)svptr + dataoffset;
168 req->callback = SvREFCNT_inc (callback);
169 238
170 send_req (req); 239 abort ();
171} 240}
172 241
173static void 242static int poll_cb ();
174poll_wait () 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{
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 sigset_t fullsigset, oldsigset;
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");
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
607static void end_thread (void)
241{ 608{
242 aio_req req; 609 aio_req req;
243 610
244 /* then loop */ 611 Newz (0, req, 1, aio_cb);
245 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 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)
639 {
640 poll_wait ();
641 poll_cb ();
642 }
643}
644
645static void create_pipe ()
646{
647 if (pipe (respipe))
648 croak ("unable to initialize result pipe");
649
650 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
651 croak ("cannot set result pipe to nonblocking mode");
652
653 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
654 croak ("cannot set result pipe to nonblocking mode");
655}
656
657/*****************************************************************************/
658/* work around various missing functions */
659
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);
718 offset += len;
719 count -= len;
720 }
721
722 errno = 0;
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);
745 }
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 (;;)
246 { 874 {
875 errno = 0;
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 }
903 }
904
905 if (errno)
906 res = -1;
907
908 req->result = res;
909}
910
911/*****************************************************************************/
912
913static void *aio_proc (void *thr_arg)
914{
915 aio_req req;
916 int type;
917 worker *self = (worker *)thr_arg;
918
919 do
920 {
921 LOCK (reqlock);
922
923 for (;;)
924 {
925 self->req = req = reqq_shift (&req_queue);
926
927 if (req)
928 break;
929
930 pthread_cond_wait (&reqwait, &reqlock);
931 }
932
933 UNLOCK (reqlock);
934
247 errno = 0; /* strictly unnecessary */ 935 errno = 0; /* strictly unnecessary */
936 type = req->type; /* remember type for QUIT check */
248 937
938 if (!(req->flags & FLAG_CANCELLED))
249 switch (req->type) 939 switch (type)
250 { 940 {
251 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;
252 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;
253#if SYS_readahead 943
254 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;
255#else 945 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
258 946
259 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 947 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
260 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 948 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
261 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 949 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
262 950
263 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;
264 case REQ_CLOSE: req->result = close (req->fd); break; 952 case REQ_CLOSE: req->result = close (req->fd); break;
265 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 953 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
266
267 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
268 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;
269 962
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:
270 case REQ_QUIT: 975 case REQ_QUIT:
271 write (respipe[1], (void *)&req, sizeof (req)); 976 break;
272 return 0;
273 977
274 default: 978 default:
275 req->result = ENOSYS; 979 req->result = ENOSYS;
276 break; 980 break;
277 } 981 }
278 982
279 req->errorno = errno; 983 req->errorno = errno;
280 write (respipe[1], (void *)&req, sizeof (req)); 984
985 LOCK (reslock);
986
987 if (!reqq_push (&res_queue, req))
988 /* write a dummy byte to the pipe so fh becomes ready */
989 write (respipe [1], &respipe, 1);
990
991 self->req = 0;
992 worker_clear (self);
993
994 UNLOCK (reslock);
281 } 995 }
996 while (type != REQ_QUIT);
997
998 LOCK (wrklock);
999 worker_free (self);
1000 UNLOCK (wrklock);
282 1001
283 return 0; 1002 return 0;
284} 1003}
285 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
286MODULE = IO::AIO PACKAGE = IO::AIO 1085MODULE = IO::AIO PACKAGE = IO::AIO
287 1086
1087PROTOTYPES: ENABLE
1088
288BOOT: 1089BOOT:
289{ 1090{
290 if (pipe (reqpipe) || pipe (respipe)) 1091 HV *stash = gv_stashpv ("IO::AIO", 1);
291 croak ("unable to initialize request or result pipe"); 1092 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1093 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1094 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
292 1095
293 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) 1096 create_pipe ();
294 croak ("cannot set result pipe to nonblocking mode"); 1097 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} 1098}
299 1099
300void 1100void
301min_parallel(nthreads) 1101min_parallel (nthreads)
302 int nthreads 1102 int nthreads
303 PROTOTYPE: $ 1103 PROTOTYPE: $
304 CODE:
305 while (nthreads > started)
306 start_thread ();
307 1104
308void 1105void
309max_parallel(nthreads) 1106max_parallel (nthreads)
310 int nthreads 1107 int nthreads
311 PROTOTYPE: $ 1108 PROTOTYPE: $
312 CODE:
313{
314 int cur = started;
315 while (cur > nthreads)
316 {
317 end_thread ();
318 cur--;
319 }
320 1109
321 while (started > nthreads)
322 {
323 poll_wait ();
324 poll_cb (aTHX);
325 }
326}
327
328void 1110void
329aio_open(pathname,flags,mode,callback) 1111aio_open (pathname,flags,mode,callback=&PL_sv_undef)
330 SV * pathname 1112 SV * pathname
331 int flags 1113 int flags
332 int mode 1114 int mode
333 SV * callback 1115 SV * callback
334 PROTOTYPE: $$$$ 1116 PROTOTYPE: $$$;$
335 CODE: 1117 PPCODE:
336{ 1118{
337 aio_req req; 1119 dREQ;
338
339 Newz (0, req, 1, aio_cb);
340
341 if (!req)
342 croak ("out of memory during aio_req allocation");
343 1120
344 req->type = REQ_OPEN; 1121 req->type = REQ_OPEN;
345 req->data = newSVsv (pathname); 1122 req->data = newSVsv (pathname);
346 req->dataptr = SvPV_nolen (req->data); 1123 req->dataptr = SvPVbyte_nolen (req->data);
347 req->fd = flags; 1124 req->fd = flags;
348 req->mode = mode; 1125 req->mode = mode;
349 req->callback = SvREFCNT_inc (callback);
350 1126
351 send_req (req); 1127 REQ_SEND;
352} 1128}
353 1129
354void 1130void
355aio_close(fh,callback) 1131aio_close (fh,callback=&PL_sv_undef)
356 InputStream fh 1132 SV * fh
357 SV * callback 1133 SV * callback
358 PROTOTYPE: $$ 1134 PROTOTYPE: $;$
359 ALIAS: 1135 ALIAS:
360 aio_close = REQ_CLOSE 1136 aio_close = REQ_CLOSE
361 aio_fsync = REQ_FSYNC 1137 aio_fsync = REQ_FSYNC
362 aio_fdatasync = REQ_FDATASYNC 1138 aio_fdatasync = REQ_FDATASYNC
363 CODE: 1139 PPCODE:
1140{
1141 dREQ;
1142
1143 req->type = ix;
1144 req->fh = newSVsv (fh);
1145 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1146
1147 REQ_SEND (req);
1148}
1149
1150void
1151aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1152 SV * fh
1153 UV offset
1154 UV length
1155 SV * data
1156 UV dataoffset
1157 SV * callback
1158 ALIAS:
1159 aio_read = REQ_READ
1160 aio_write = REQ_WRITE
1161 PROTOTYPE: $$$$$;$
1162 PPCODE:
364{ 1163{
365 aio_req req; 1164 aio_req req;
1165 STRLEN svlen;
1166 char *svptr = SvPVbyte (data, svlen);
366 1167
367 Newz (0, req, 1, aio_cb); 1168 SvUPGRADE (data, SVt_PV);
1169 SvPOK_on (data);
368 1170
369 if (!req) 1171 if (dataoffset < 0)
370 croak ("out of memory during aio_req allocation"); 1172 dataoffset += svlen;
371 1173
372 req->type = ix; 1174 if (dataoffset < 0 || dataoffset > svlen)
373 req->fd = PerlIO_fileno (fh); 1175 croak ("data offset outside of string");
374 req->callback = SvREFCNT_inc (callback);
375 1176
376 send_req (req); 1177 if (ix == REQ_WRITE)
377} 1178 {
378 1179 /* write: check length and adjust. */
379void 1180 if (length < 0 || length + dataoffset > svlen)
380aio_read(fh,offset,length,data,dataoffset,callback) 1181 length = svlen - dataoffset;
381 InputStream fh 1182 }
382 UV offset 1183 else
383 IV length 1184 {
384 SV * data 1185 /* read: grow scalar as necessary */
385 IV dataoffset 1186 svptr = SvGROW (data, length + dataoffset);
386 SV * callback 1187 }
387 PROTOTYPE: $$$$$$
388 CODE:
389 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
390
391void
392aio_write(fh,offset,length,data,dataoffset,callback)
393 OutputStream fh
394 UV offset
395 IV length
396 SV * data
397 IV dataoffset
398 SV * callback
399 PROTOTYPE: $$$$$$
400 CODE:
401 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
402
403void
404aio_readahead(fh,offset,length,callback)
405 InputStream fh
406 UV offset
407 IV length
408 SV * callback
409 PROTOTYPE: $$$$
410 CODE:
411{
412 aio_req req;
413 1188
414 if (length < 0) 1189 if (length < 0)
415 croak ("length must not be negative"); 1190 croak ("length must not be negative");
416 1191
417 Newz (0, req, 1, aio_cb); 1192 {
1193 dREQ;
418 1194
419 if (!req) 1195 req->type = ix;
420 croak ("out of memory during aio_req allocation"); 1196 req->fh = newSVsv (fh);
1197 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1198 : IoOFP (sv_2io (fh)));
1199 req->offset = offset;
1200 req->length = length;
1201 req->data = SvREFCNT_inc (data);
1202 req->dataptr = (char *)svptr + dataoffset;
1203
1204 if (!SvREADONLY (data))
1205 {
1206 SvREADONLY_on (data);
1207 req->data2ptr = (void *)data;
1208 }
1209
1210 REQ_SEND;
1211 }
1212}
1213
1214void
1215aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1216 SV * out_fh
1217 SV * in_fh
1218 UV in_offset
1219 UV length
1220 SV * callback
1221 PROTOTYPE: $$$$;$
1222 PPCODE:
1223{
1224 dREQ;
1225
1226 req->type = REQ_SENDFILE;
1227 req->fh = newSVsv (out_fh);
1228 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1229 req->fh2 = newSVsv (in_fh);
1230 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1231 req->offset = in_offset;
1232 req->length = length;
1233
1234 REQ_SEND;
1235}
1236
1237void
1238aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1239 SV * fh
1240 UV offset
1241 IV length
1242 SV * callback
1243 PROTOTYPE: $$$;$
1244 PPCODE:
1245{
1246 dREQ;
421 1247
422 req->type = REQ_READAHEAD; 1248 req->type = REQ_READAHEAD;
1249 req->fh = newSVsv (fh);
423 req->fd = PerlIO_fileno (fh); 1250 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
424 req->offset = offset; 1251 req->offset = offset;
425 req->length = length; 1252 req->length = length;
426 req->callback = SvREFCNT_inc (callback);
427 1253
428 send_req (req); 1254 REQ_SEND;
429} 1255}
430 1256
431void 1257void
432aio_stat(fh_or_path,callback) 1258aio_stat (fh_or_path,callback=&PL_sv_undef)
433 SV * fh_or_path 1259 SV * fh_or_path
434 SV * callback 1260 SV * callback
435 PROTOTYPE: $$
436 ALIAS: 1261 ALIAS:
1262 aio_stat = REQ_STAT
437 aio_lstat = 1 1263 aio_lstat = REQ_LSTAT
438 CODE: 1264 PPCODE:
439{ 1265{
440 aio_req req; 1266 dREQ;
441
442 Newz (0, req, 1, aio_cb);
443
444 if (!req)
445 croak ("out of memory during aio_req allocation");
446 1267
447 New (0, req->statdata, 1, Stat_t); 1268 New (0, req->statdata, 1, Stat_t);
448
449 if (!req->statdata) 1269 if (!req->statdata)
1270 {
1271 req_free (req);
450 croak ("out of memory during aio_req->statdata allocation"); 1272 croak ("out of memory during aio_req->statdata allocation");
1273 }
451 1274
452 if (SvPOK (fh_or_path)) 1275 if (SvPOK (fh_or_path))
453 { 1276 {
454 req->type = ix ? REQ_LSTAT : REQ_STAT; 1277 req->type = ix;
455 req->data = newSVsv (fh_or_path); 1278 req->data = newSVsv (fh_or_path);
456 req->dataptr = SvPV_nolen (req->data); 1279 req->dataptr = SvPVbyte_nolen (req->data);
457 } 1280 }
458 else 1281 else
459 { 1282 {
460 req->type = REQ_FSTAT; 1283 req->type = REQ_FSTAT;
1284 req->fh = newSVsv (fh_or_path);
461 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1285 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
462 } 1286 }
463 1287
464 req->callback = SvREFCNT_inc (callback); 1288 REQ_SEND;
465
466 send_req (req);
467} 1289}
468 1290
469void 1291void
470aio_unlink(pathname,callback) 1292aio_unlink (pathname,callback=&PL_sv_undef)
471 SV * pathname 1293 SV * pathname
472 SV * callback 1294 SV * callback
1295 ALIAS:
1296 aio_unlink = REQ_UNLINK
1297 aio_rmdir = REQ_RMDIR
1298 aio_readdir = REQ_READDIR
1299 PPCODE:
1300{
1301 dREQ;
1302
1303 req->type = ix;
1304 req->data = newSVsv (pathname);
1305 req->dataptr = SvPVbyte_nolen (req->data);
1306
1307 REQ_SEND;
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;
1322
1323 req->type = ix;
1324 req->fh = newSVsv (oldpath);
1325 req->data2ptr = SvPVbyte_nolen (req->fh);
1326 req->data = newSVsv (newpath);
1327 req->dataptr = SvPVbyte_nolen (req->data);
1328
1329 REQ_SEND;
1330}
1331
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
473 PROTOTYPE: $$ 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
1389flush ()
1390 PROTOTYPE:
474 CODE: 1391 CODE:
475{ 1392 while (nreqs)
476 aio_req req; 1393 {
477 1394 poll_wait ();
478 Newz (0, req, 1, aio_cb); 1395 poll_cb ();
479 1396 }
480 if (!req) 1397
481 croak ("out of memory during aio_req allocation"); 1398void
482 1399poll()
483 req->type = REQ_UNLINK; 1400 PROTOTYPE:
484 req->data = newSVsv (pathname); 1401 CODE:
485 req->dataptr = SvPV_nolen (req->data); 1402 if (nreqs)
486 req->callback = SvREFCNT_inc (callback); 1403 {
487 1404 poll_wait ();
488 send_req (req); 1405 poll_cb ();
489} 1406 }
490 1407
491int 1408int
492poll_fileno() 1409poll_fileno()
493 PROTOTYPE: 1410 PROTOTYPE:
494 CODE: 1411 CODE:
495 RETVAL = respipe[0]; 1412 RETVAL = respipe [0];
496 OUTPUT: 1413 OUTPUT:
497 RETVAL 1414 RETVAL
498 1415
499int 1416int
500poll_cb(...) 1417poll_cb(...)
501 PROTOTYPE: 1418 PROTOTYPE:
502 CODE: 1419 CODE:
503 RETVAL = poll_cb (aTHX); 1420 RETVAL = poll_cb ();
504 OUTPUT: 1421 OUTPUT:
505 RETVAL 1422 RETVAL
506 1423
507void 1424void
508poll_wait() 1425poll_wait()
509 PROTOTYPE: 1426 PROTOTYPE:
510 CODE: 1427 CODE:
1428 if (nreqs)
511 poll_wait (); 1429 poll_wait ();
512 1430
513int 1431int
514nreqs() 1432nreqs()
515 PROTOTYPE: 1433 PROTOTYPE:
516 CODE: 1434 CODE:
517 RETVAL = nreqs; 1435 RETVAL = nreqs;
518 OUTPUT: 1436 OUTPUT:
519 RETVAL 1437 RETVAL
520 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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