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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.2 by root, Sun Jul 10 18:16:49 2005 UTC vs.
Revision 1.67 by root, Tue Oct 24 03:17:39 2006 UTC

1#define PERL_NO_GET_CONTEXT 1#if __linux
2# define _GNU_SOURCE
3#endif
4
5#define _REENTRANT 1
6
7#include <errno.h>
2 8
3#include "EXTERN.h" 9#include "EXTERN.h"
4#include "perl.h" 10#include "perl.h"
5#include "XSUB.h" 11#include "XSUB.h"
6 12
13#include "autoconf/config.h"
14
15#include <pthread.h>
16
17#include <stddef.h>
18#include <errno.h>
19#include <sys/time.h>
20#include <sys/select.h>
7#include <sys/types.h> 21#include <sys/types.h>
8#include <sys/stat.h> 22#include <sys/stat.h>
23#include <limits.h>
9#include <unistd.h> 24#include <unistd.h>
10#include <fcntl.h> 25#include <fcntl.h>
11#include <signal.h> 26#include <signal.h>
12#include <sched.h> 27#include <sched.h>
13#include <endian.h>
14 28
15#include <pthread.h> 29#if HAVE_SENDFILE
30# if __linux
31# include <sys/sendfile.h>
32# elif __freebsd
16#include <sys/syscall.h> 33# include <sys/socket.h>
34# include <sys/uio.h>
35# elif __hpux
36# include <sys/socket.h>
37# elif __solaris /* not yet */
38# include <sys/sendfile.h>
39# else
40# error sendfile support requested but not available
41# endif
42#endif
17 43
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 44/* used for struct dirent, AIX doesn't provide it */
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 45#ifndef NAME_MAX
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 46# define NAME_MAX 4096
47#endif
21 48
22#if __i386 || __amd64
23# define STACKSIZE ( 256 * sizeof (long))
24#elif __ia64 49#if __ia64
25# define STACKSIZE (8192 * sizeof (long)) 50# define STACKSIZE 65536
51#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
52# define STACKSIZE PTHREAD_STACK_MIN
26#else 53#else
27# define STACKSIZE ( 512 * sizeof (long)) 54# define STACKSIZE 16384
28#endif 55#endif
56
57/* buffer size for various temporary buffers */
58#define AIO_BUFSIZE 65536
59
60#define dBUF \
61 char *aio_buf = malloc (AIO_BUFSIZE); \
62 if (!aio_buf) \
63 return -1;
64
65#define fBUF free (aio_buf)
29 66
30enum { 67enum {
31 REQ_QUIT, 68 REQ_QUIT,
32 REQ_OPEN, REQ_CLOSE, 69 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD, 70 REQ_READ, REQ_WRITE, REQ_READAHEAD,
71 REQ_SENDFILE,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK, 72 REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35 REQ_FSYNC, REQ_FDATASYNC, 73 REQ_FSYNC, REQ_FDATASYNC,
74 REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
75 REQ_READDIR,
76 REQ_LINK, REQ_SYMLINK,
77 REQ_GROUP, REQ_NOP,
78 REQ_SLEEP,
36}; 79};
37 80
81#define AIO_REQ_KLASS "IO::AIO::REQ"
82#define AIO_GRP_KLASS "IO::AIO::GRP"
83
38typedef struct aio_cb { 84typedef struct aio_cb
85{
39 struct aio_cb *next; 86 struct aio_cb *volatile next;
40 87
41 int type; 88 SV *data, *callback;
42 89 SV *fh, *fh2;
43 int fd; 90 void *dataptr, *data2ptr;
91 Stat_t *statdata;
44 off_t offset; 92 off_t offset;
45 size_t length; 93 size_t length;
46 ssize_t result; 94 ssize_t result;
95
96 STRLEN dataoffset;
97 int type;
98 int fd, fd2;
99 int errorno;
47 mode_t mode; /* open */ 100 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52 101
53 Stat_t *statdata; 102 unsigned char flags;
103 unsigned char pri;
104
105 SV *self; /* the perl counterpart of this request, if any */
106 struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54} aio_cb; 107} aio_cb;
55 108
109enum {
110 FLAG_CANCELLED = 0x01,
111};
112
56typedef aio_cb *aio_req; 113typedef aio_cb *aio_req;
114typedef aio_cb *aio_req_ornot;
57 115
116enum {
117 PRI_MIN = -4,
118 PRI_MAX = 4,
119
120 DEFAULT_PRI = 0,
121 PRI_BIAS = -PRI_MIN,
122 NUM_PRI = PRI_MAX + PRI_BIAS + 1,
123};
124
125static int next_pri = DEFAULT_PRI + PRI_BIAS;
126
58static int started; 127static int started, wanted;
59static int nreqs; 128static volatile int nreqs;
129static int max_outstanding = 1<<30;
60static int reqpipe[2], respipe[2]; 130static int respipe [2];
61 131
62static aio_req qs, qe; /* queue start, queue end */ 132#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
133# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
134#else
135# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
136#endif
63 137
64static void *aio_proc(void *arg); 138static pthread_mutex_t reslock = AIO_MUTEX_INIT;
139static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
140static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65 141
66static void 142/*
67start_thread (void) 143 * a somewhat faster data structure might be nice, but
68{ 144 * with 8 priorities this actually needs <20 insns
69 sigset_t fullsigset, oldsigset; 145 * per shift, the most expensive operation.
70 pthread_t tid; 146 */
71 pthread_attr_t attr; 147typedef struct {
148 aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
149 int size;
150} reqq;
72 151
73 pthread_attr_init (&attr); 152static reqq req_queue;
74 pthread_attr_setstacksize (&attr, STACKSIZE); 153static reqq res_queue;
75 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
76 154
77 sigfillset (&fullsigset); 155int reqq_push (reqq *q, aio_req req)
78 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79
80 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
81 started++;
82
83 sigprocmask (SIG_SETMASK, &oldsigset, 0);
84}
85
86static void
87send_reqs (void)
88{ 156{
89 /* this write is atomic */ 157 int pri = req->pri;
90 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
91 {
92 qs = qs->next;
93 if (!qs) qe = 0;
94 }
95}
96
97static void
98send_req (aio_req req)
99{
100 nreqs++;
101 req->next = 0; 158 req->next = 0;
102 159
103 if (qe) 160 if (q->qe[pri])
104 { 161 {
105 qe->next = req; 162 q->qe[pri]->next = req;
106 qe = req; 163 q->qe[pri] = req;
107 } 164 }
108 else 165 else
109 qe = qs = req; 166 q->qe[pri] = q->qs[pri] = req;
110 167
111 send_reqs (); 168 return q->size++;
112} 169}
113 170
114static void 171aio_req reqq_shift (reqq *q)
115end_thread (void)
116{ 172{
117 aio_req req; 173 int pri;
118 New (0, req, 1, aio_cb);
119 req->type = REQ_QUIT;
120 174
121 send_req (req); 175 if (!q->size)
122} 176 return 0;
123 177
124static void 178 --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);
132 179
133 SvUPGRADE (data, SVt_PV); 180 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 } 181 {
148 else 182 aio_req req = q->qs[pri];
149 {
150 /* read: grow scalar as necessary */
151 svptr = SvGROW (data, length + dataoffset);
152 }
153 183
154 if (length < 0)
155 croak ("length must not be negative");
156
157 Newz (0, req, 1, aio_cb);
158
159 if (!req) 184 if (req)
160 croak ("out of memory during aio_req allocation"); 185 {
186 if (!(q->qs[pri] = req->next))
187 q->qe[pri] = 0;
161 188
162 req->type = dowrite ? REQ_WRITE : REQ_READ; 189 return req;
163 req->fd = fd; 190 }
164 req->offset = offset; 191 }
165 req->length = length;
166 req->data = SvREFCNT_inc (data);
167 req->dataptr = (char *)svptr + dataoffset;
168 req->callback = SvREFCNT_inc (callback);
169 192
170 send_req (req); 193 abort ();
171} 194}
172 195
173static void 196static void req_invoke (aio_req req);
174poll_wait () 197static void req_free (aio_req req);
198
199/* must be called at most once */
200static SV *req_sv (aio_req req, const char *klass)
201{
202 if (!req->self)
203 {
204 req->self = (SV *)newHV ();
205 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
206 }
207
208 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
209}
210
211static aio_req SvAIO_REQ (SV *sv)
212{
213 MAGIC *mg;
214
215 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
216 croak ("object of class " AIO_REQ_KLASS " expected");
217
218 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
219
220 return mg ? (aio_req)mg->mg_ptr : 0;
221}
222
223static void aio_grp_feed (aio_req grp)
224{
225 while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
226 {
227 int old_len = grp->length;
228
229 if (grp->fh2 && SvOK (grp->fh2))
230 {
231 dSP;
232
233 ENTER;
234 SAVETMPS;
235 PUSHMARK (SP);
236 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
237 PUTBACK;
238 call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
239 SPAGAIN;
240 FREETMPS;
241 LEAVE;
242 }
243
244 /* stop if no progress has been made */
245 if (old_len == grp->length)
246 {
247 SvREFCNT_dec (grp->fh2);
248 grp->fh2 = 0;
249 break;
250 }
251 }
252}
253
254static void aio_grp_dec (aio_req grp)
255{
256 --grp->length;
257
258 /* call feeder, if applicable */
259 aio_grp_feed (grp);
260
261 /* finish, if done */
262 if (!grp->length && grp->fd)
263 {
264 req_invoke (grp);
265 req_free (grp);
266 }
267}
268
269static void poll_wait ()
175{ 270{
176 fd_set rfd; 271 fd_set rfd;
272
273 while (nreqs)
274 {
275 int size;
276#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
277 pthread_mutex_lock (&reslock);
278#endif
279 size = res_queue.size;
280#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
281 pthread_mutex_unlock (&reslock);
282#endif
283
284 if (size)
285 return;
286
177 FD_ZERO(&rfd); 287 FD_ZERO(&rfd);
178 FD_SET(respipe[0], &rfd); 288 FD_SET(respipe [0], &rfd);
179 289
180 select (respipe[0] + 1, &rfd, 0, 0, 0); 290 select (respipe [0] + 1, &rfd, 0, 0, 0);
291 }
181} 292}
182 293
183static int 294static void req_invoke (aio_req req)
184poll_cb (pTHX) 295{
296 dSP;
297
298 if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
299 {
300 errno = req->errorno;
301
302 ENTER;
303 SAVETMPS;
304 PUSHMARK (SP);
305 EXTEND (SP, 1);
306
307 switch (req->type)
308 {
309 case REQ_READDIR:
310 {
311 SV *rv = &PL_sv_undef;
312
313 if (req->result >= 0)
314 {
315 char *buf = req->data2ptr;
316 AV *av = newAV ();
317
318 while (req->result)
319 {
320 SV *sv = newSVpv (buf, 0);
321
322 av_push (av, sv);
323 buf += SvCUR (sv) + 1;
324 req->result--;
325 }
326
327 rv = sv_2mortal (newRV_noinc ((SV *)av));
328 }
329
330 PUSHs (rv);
331 }
332 break;
333
334 case REQ_OPEN:
335 {
336 /* convert fd to fh */
337 SV *fh;
338
339 PUSHs (sv_2mortal (newSViv (req->result)));
340 PUTBACK;
341 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
342 SPAGAIN;
343
344 fh = SvREFCNT_inc (POPs);
345
346 PUSHMARK (SP);
347 XPUSHs (sv_2mortal (fh));
348 }
349 break;
350
351 case REQ_GROUP:
352 req->fd = 2; /* mark group as finished */
353
354 if (req->data)
355 {
356 int i;
357 AV *av = (AV *)req->data;
358
359 EXTEND (SP, AvFILL (av) + 1);
360 for (i = 0; i <= AvFILL (av); ++i)
361 PUSHs (*av_fetch (av, i, 0));
362 }
363 break;
364
365 case REQ_NOP:
366 case REQ_SLEEP:
367 break;
368
369 default:
370 PUSHs (sv_2mortal (newSViv (req->result)));
371 break;
372 }
373
374
375 PUTBACK;
376 call_sv (req->callback, G_VOID | G_EVAL);
377 SPAGAIN;
378
379 FREETMPS;
380 LEAVE;
381 }
382
383 if (req->grp)
384 {
385 aio_req grp = req->grp;
386
387 /* unlink request */
388 if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
389 if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
390
391 if (grp->grp_first == req)
392 grp->grp_first = req->grp_next;
393
394 aio_grp_dec (grp);
395 }
396
397 if (SvTRUE (ERRSV))
398 {
399 req_free (req);
400 croak (0);
401 }
402}
403
404static void req_free (aio_req req)
405{
406 if (req->self)
407 {
408 sv_unmagic (req->self, PERL_MAGIC_ext);
409 SvREFCNT_dec (req->self);
410 }
411
412 SvREFCNT_dec (req->data);
413 SvREFCNT_dec (req->fh);
414 SvREFCNT_dec (req->fh2);
415 SvREFCNT_dec (req->callback);
416 Safefree (req->statdata);
417
418 if (req->type == REQ_READDIR && req->result >= 0)
419 free (req->data2ptr);
420
421 Safefree (req);
422}
423
424static void req_cancel (aio_req req)
425{
426 req->flags |= FLAG_CANCELLED;
427
428 if (req->type == REQ_GROUP)
429 {
430 aio_req sub;
431
432 for (sub = req->grp_first; sub; sub = sub->grp_next)
433 req_cancel (sub);
434 }
435}
436
437static int poll_cb ()
185{ 438{
186 dSP; 439 dSP;
187 int count = 0; 440 int count = 0;
441 int do_croak = 0;
188 aio_req req; 442 aio_req req;
189 443
190 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 444 for (;;)
191 { 445 {
446 pthread_mutex_lock (&reslock);
447 req = reqq_shift (&res_queue);
448
449 if (req)
450 {
451 if (!res_queue.size)
452 {
453 /* read any signals sent by the worker threads */
454 char buf [32];
455 while (read (respipe [0], buf, 32) == 32)
456 ;
457 }
458 }
459
460 pthread_mutex_unlock (&reslock);
461
462 if (!req)
463 break;
464
192 nreqs--; 465 --nreqs;
193 466
194 if (req->type == REQ_QUIT) 467 if (req->type == REQ_QUIT)
195 started--; 468 started--;
469 else if (req->type == REQ_GROUP && req->length)
470 {
471 req->fd = 1; /* mark request as delayed */
472 continue;
473 }
196 else 474 else
197 { 475 {
198 int errorno = errno;
199 errno = req->errorno;
200
201 if (req->type == REQ_READ) 476 if (req->type == REQ_READ)
202 SvCUR_set (req->data, req->dataoffset 477 SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
203 + req->result > 0 ? req->result : 0);
204 478
479 if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
480 SvREADONLY_off (req->data);
481
205 if (req->data) 482 if (req->statdata)
206 SvREFCNT_dec (req->data);
207
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209 { 483 {
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 484 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211 PL_laststatval = req->result; 485 PL_laststatval = req->result;
212 PL_statcache = *(req->statdata); 486 PL_statcache = *(req->statdata);
213
214 Safefree (req->statdata);
215 } 487 }
216 488
217 PUSHMARK (SP); 489 req_invoke (req);
218 XPUSHs (sv_2mortal (newSViv (req->result)));
219 490
220 if (req->type == REQ_OPEN)
221 {
222 /* convert fd to fh */
223 SV *fh;
224
225 PUTBACK;
226 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
227 SPAGAIN;
228
229 fh = POPs;
230
231 PUSHMARK (SP);
232 XPUSHs (fh);
233 }
234
235 PUTBACK;
236 call_sv (req->callback, G_VOID | G_EVAL);
237 SPAGAIN;
238
239 if (req->callback)
240 SvREFCNT_dec (req->callback);
241
242 errno = errorno;
243 count++; 491 count++;
244 } 492 }
245 493
246 Safefree (req); 494 req_free (req);
247 } 495 }
248
249 if (qs)
250 send_reqs ();
251 496
252 return count; 497 return count;
253} 498}
254 499
255static void * 500static void *aio_proc(void *arg);
256aio_proc (void *thr_arg) 501
502static void start_thread (void)
503{
504 sigset_t fullsigset, oldsigset;
505 pthread_t tid;
506 pthread_attr_t attr;
507
508 pthread_attr_init (&attr);
509 pthread_attr_setstacksize (&attr, STACKSIZE);
510 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
511
512 sigfillset (&fullsigset);
513 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
514
515 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
516 started++;
517
518 sigprocmask (SIG_SETMASK, &oldsigset, 0);
519}
520
521static void req_send (aio_req req)
522{
523 while (started < wanted && nreqs >= started)
524 start_thread ();
525
526 ++nreqs;
527
528 pthread_mutex_lock (&reqlock);
529 reqq_push (&req_queue, req);
530 pthread_cond_signal (&reqwait);
531 pthread_mutex_unlock (&reqlock);
532
533 if (nreqs > max_outstanding)
534 for (;;)
535 {
536 poll_cb ();
537
538 if (nreqs <= max_outstanding)
539 break;
540
541 poll_wait ();
542 }
543}
544
545static void end_thread (void)
257{ 546{
258 aio_req req; 547 aio_req req;
259 548
260 /* then loop */ 549 Newz (0, req, 1, aio_cb);
261 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 550
551 req->type = REQ_QUIT;
552 req->pri = PRI_MAX + PRI_BIAS;
553
554 req_send (req);
555}
556
557static void min_parallel (int nthreads)
558{
559 if (wanted < nthreads)
560 wanted = nthreads;
561}
562
563static void max_parallel (int nthreads)
564{
565 int cur = started;
566
567 if (wanted > nthreads)
568 wanted = nthreads;
569
570 while (cur > wanted)
571 {
572 end_thread ();
573 cur--;
574 }
575
576 while (started > wanted)
577 {
578 poll_wait ();
579 poll_cb ();
580 }
581}
582
583static void create_pipe ()
584{
585 if (pipe (respipe))
586 croak ("unable to initialize result pipe");
587
588 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
589 croak ("cannot set result pipe to nonblocking mode");
590
591 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
592 croak ("cannot set result pipe to nonblocking mode");
593}
594
595/*****************************************************************************/
596/* work around various missing functions */
597
598#if !HAVE_PREADWRITE
599# define pread aio_pread
600# define pwrite aio_pwrite
601
602/*
603 * make our pread/pwrite safe against themselves, but not against
604 * normal read/write by using a mutex. slows down execution a lot,
605 * but that's your problem, not mine.
606 */
607static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
608
609static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
610{
611 ssize_t res;
612 off_t ooffset;
613
614 pthread_mutex_lock (&preadwritelock);
615 ooffset = lseek (fd, 0, SEEK_CUR);
616 lseek (fd, offset, SEEK_SET);
617 res = read (fd, buf, count);
618 lseek (fd, ooffset, SEEK_SET);
619 pthread_mutex_unlock (&preadwritelock);
620
621 return res;
622}
623
624static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
625{
626 ssize_t res;
627 off_t ooffset;
628
629 pthread_mutex_lock (&preadwritelock);
630 ooffset = lseek (fd, 0, SEEK_CUR);
631 lseek (fd, offset, SEEK_SET);
632 res = write (fd, buf, count);
633 lseek (fd, offset, SEEK_SET);
634 pthread_mutex_unlock (&preadwritelock);
635
636 return res;
637}
638#endif
639
640#if !HAVE_FDATASYNC
641# define fdatasync fsync
642#endif
643
644#if !HAVE_READAHEAD
645# define readahead aio_readahead
646
647static ssize_t readahead (int fd, off_t offset, size_t count)
648{
649 dBUF;
650
651 while (count > 0)
652 {
653 size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
654
655 pread (fd, aio_buf, len, offset);
656 offset += len;
657 count -= len;
658 }
659
660 fBUF;
661
662 errno = 0;
663}
664#endif
665
666#if !HAVE_READDIR_R
667# define readdir_r aio_readdir_r
668
669static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
670
671static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
672{
673 struct dirent *e;
674 int errorno;
675
676 pthread_mutex_lock (&readdirlock);
677
678 e = readdir (dirp);
679 errorno = errno;
680
681 if (e)
682 {
683 *res = ent;
684 strcpy (ent->d_name, e->d_name);
685 }
686 else
687 *res = 0;
688
689 pthread_mutex_unlock (&readdirlock);
690
691 errno = errorno;
692 return e ? 0 : -1;
693}
694#endif
695
696/* sendfile always needs emulation */
697static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
698{
699 ssize_t res;
700
701 if (!count)
702 return 0;
703
704#if HAVE_SENDFILE
705# if __linux
706 res = sendfile (ofd, ifd, &offset, count);
707
708# elif __freebsd
709 /*
710 * Of course, the freebsd sendfile is a dire hack with no thoughts
711 * wasted on making it similar to other I/O functions.
712 */
713 {
714 off_t sbytes;
715 res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
716
717 if (res < 0 && sbytes)
718 /* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
719 res = sbytes;
720 }
721
722# elif __hpux
723 res = sendfile (ofd, ifd, offset, count, 0, 0);
724
725# elif __solaris
726 {
727 struct sendfilevec vec;
728 size_t sbytes;
729
730 vec.sfv_fd = ifd;
731 vec.sfv_flag = 0;
732 vec.sfv_off = offset;
733 vec.sfv_len = count;
734
735 res = sendfilev (ofd, &vec, 1, &sbytes);
736
737 if (res < 0 && sbytes)
738 res = sbytes;
739 }
740
741# endif
742#else
743 res = -1;
744 errno = ENOSYS;
745#endif
746
747 if (res < 0
748 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
749#if __solaris
750 || errno == EAFNOSUPPORT || errno == EPROTOTYPE
751#endif
752 )
753 )
754 {
755 /* emulate sendfile. this is a major pain in the ass */
756 dBUF;
757
758 res = 0;
759
760 while (count)
761 {
762 ssize_t cnt;
763
764 cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
765
766 if (cnt <= 0)
767 {
768 if (cnt && !res) res = -1;
769 break;
770 }
771
772 cnt = write (ofd, aio_buf, cnt);
773
774 if (cnt <= 0)
775 {
776 if (cnt && !res) res = -1;
777 break;
778 }
779
780 offset += cnt;
781 res += cnt;
782 count -= cnt;
783 }
784
785 fBUF;
786 }
787
788 return res;
789}
790
791/* read a full directory */
792static int scandir_ (const char *path, void **namesp)
793{
794 DIR *dirp;
795 union
796 {
797 struct dirent d;
798 char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
799 } *u;
800 struct dirent *entp;
801 char *name, *names;
802 int memlen = 4096;
803 int memofs = 0;
804 int res = 0;
805 int errorno;
806
807 dirp = opendir (path);
808 if (!dirp)
809 return -1;
810
811 u = malloc (sizeof (*u));
812 names = malloc (memlen);
813
814 if (u && names)
815 for (;;)
262 { 816 {
817 errno = 0;
818 readdir_r (dirp, &u->d, &entp);
819
820 if (!entp)
821 break;
822
823 name = entp->d_name;
824
825 if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
826 {
827 int len = strlen (name) + 1;
828
829 res++;
830
831 while (memofs + len > memlen)
832 {
833 memlen *= 2;
834 names = realloc (names, memlen);
835 if (!names)
836 break;
837 }
838
839 memcpy (names + memofs, name, len);
840 memofs += len;
841 }
842 }
843
844 errorno = errno;
845 free (u);
846 closedir (dirp);
847
848 if (errorno)
849 {
850 free (names);
851 errno = errorno;
852 res = -1;
853 }
854
855 *namesp = (void *)names;
856 return res;
857}
858
859/*****************************************************************************/
860
861static void *aio_proc (void *thr_arg)
862{
863 aio_req req;
864 int type;
865
866 do
867 {
868 pthread_mutex_lock (&reqlock);
869
870 for (;;)
871 {
872 req = reqq_shift (&req_queue);
873
874 if (req)
875 break;
876
877 pthread_cond_wait (&reqwait, &reqlock);
878 }
879
880 pthread_mutex_unlock (&reqlock);
881
263 errno = 0; /* strictly unnecessary */ 882 errno = 0; /* strictly unnecessary */
883 type = req->type; /* remember type for QUIT check */
264 884
885 if (!(req->flags & FLAG_CANCELLED))
265 switch (req->type) 886 switch (type)
266 { 887 {
267 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 888 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
268 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 889 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
269#if SYS_readahead 890
270 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break; 891 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
271#else 892 case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
272 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
273#endif
274 893
275 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 894 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
276 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 895 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
277 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 896 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
278 897
279 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 898 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
280 case REQ_CLOSE: req->result = close (req->fd); break; 899 case REQ_CLOSE: req->result = close (req->fd); break;
281 case REQ_UNLINK: req->result = unlink (req->dataptr); break; 900 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
282
283 case REQ_FSYNC: req->result = fsync (req->fd); break; 901 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
902 case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
903 case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
904 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
905
284 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 906 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
907 case REQ_FSYNC: req->result = fsync (req->fd); break;
908 case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
285 909
910 case REQ_SLEEP:
911 {
912 struct timeval tv;
913
914 tv.tv_sec = req->fd;
915 tv.tv_usec = req->fd2;
916
917 req->result = select (0, 0, 0, 0, &tv);
918 }
919
920 case REQ_GROUP:
921 case REQ_NOP:
286 case REQ_QUIT: 922 case REQ_QUIT:
287 write (respipe[1], (void *)&req, sizeof (req)); 923 break;
288 return 0;
289 924
290 default: 925 default:
291 req->result = ENOSYS; 926 req->result = ENOSYS;
292 break; 927 break;
293 } 928 }
294 929
295 req->errorno = errno; 930 req->errorno = errno;
296 write (respipe[1], (void *)&req, sizeof (req)); 931
932 pthread_mutex_lock (&reslock);
933
934 if (!reqq_push (&res_queue, req))
935 /* write a dummy byte to the pipe so fh becomes ready */
936 write (respipe [1], &respipe, 1);
937
938 pthread_mutex_unlock (&reslock);
297 } 939 }
940 while (type != REQ_QUIT);
298 941
299 return 0; 942 return 0;
300} 943}
301 944
945/*****************************************************************************/
946
947static void atfork_prepare (void)
948{
949 pthread_mutex_lock (&reqlock);
950 pthread_mutex_lock (&reslock);
951#if !HAVE_PREADWRITE
952 pthread_mutex_lock (&preadwritelock);
953#endif
954#if !HAVE_READDIR_R
955 pthread_mutex_lock (&readdirlock);
956#endif
957}
958
959static void atfork_parent (void)
960{
961#if !HAVE_READDIR_R
962 pthread_mutex_unlock (&readdirlock);
963#endif
964#if !HAVE_PREADWRITE
965 pthread_mutex_unlock (&preadwritelock);
966#endif
967 pthread_mutex_unlock (&reslock);
968 pthread_mutex_unlock (&reqlock);
969}
970
971static void atfork_child (void)
972{
973 aio_req prv;
974
975 started = 0;
976
977 while (prv = reqq_shift (&req_queue))
978 req_free (prv);
979
980 while (prv = reqq_shift (&res_queue))
981 req_free (prv);
982
983 close (respipe [0]);
984 close (respipe [1]);
985 create_pipe ();
986
987 atfork_parent ();
988}
989
990#define dREQ \
991 aio_req req; \
992 int req_pri = next_pri; \
993 next_pri = DEFAULT_PRI + PRI_BIAS; \
994 \
995 if (SvOK (callback) && !SvROK (callback)) \
996 croak ("callback must be undef or of reference type"); \
997 \
998 Newz (0, req, 1, aio_cb); \
999 if (!req) \
1000 croak ("out of memory during aio_req allocation"); \
1001 \
1002 req->callback = newSVsv (callback); \
1003 req->pri = req_pri
1004
1005#define REQ_SEND \
1006 req_send (req); \
1007 \
1008 if (GIMME_V != G_VOID) \
1009 XPUSHs (req_sv (req, AIO_REQ_KLASS));
1010
302MODULE = IO::AIO PACKAGE = IO::AIO 1011MODULE = IO::AIO PACKAGE = IO::AIO
303 1012
1013PROTOTYPES: ENABLE
1014
304BOOT: 1015BOOT:
305{ 1016{
306 if (pipe (reqpipe) || pipe (respipe)) 1017 HV *stash = gv_stashpv ("IO::AIO", 1);
307 croak ("unable to initialize request or result pipe"); 1018 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1019 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1020 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
308 1021
309 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) 1022 create_pipe ();
310 croak ("cannot set result pipe to nonblocking mode"); 1023 pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
311
312 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
313 croak ("cannot set result pipe to nonblocking mode");
314} 1024}
315 1025
316void 1026void
317min_parallel(nthreads) 1027min_parallel (nthreads)
318 int nthreads 1028 int nthreads
319 PROTOTYPE: $ 1029 PROTOTYPE: $
320 CODE:
321 while (nthreads > started)
322 start_thread ();
323 1030
324void 1031void
325max_parallel(nthreads) 1032max_parallel (nthreads)
326 int nthreads 1033 int nthreads
327 PROTOTYPE: $ 1034 PROTOTYPE: $
1035
1036int
1037max_outstanding (nreqs)
1038 int nreqs
1039 PROTOTYPE: $
328 CODE: 1040 CODE:
329{ 1041 RETVAL = max_outstanding;
330 int cur = started; 1042 max_outstanding = nreqs;
331 while (cur > nthreads)
332 {
333 end_thread ();
334 cur--;
335 }
336 1043
337 while (started > nthreads)
338 {
339 poll_wait ();
340 poll_cb (aTHX);
341 }
342}
343
344void 1044void
345aio_open(pathname,flags,mode,callback) 1045aio_open (pathname,flags,mode,callback=&PL_sv_undef)
346 SV * pathname 1046 SV * pathname
347 int flags 1047 int flags
348 int mode 1048 int mode
349 SV * callback 1049 SV * callback
350 PROTOTYPE: $$$$ 1050 PROTOTYPE: $$$;$
351 CODE: 1051 PPCODE:
352{ 1052{
353 aio_req req; 1053 dREQ;
354
355 Newz (0, req, 1, aio_cb);
356
357 if (!req)
358 croak ("out of memory during aio_req allocation");
359 1054
360 req->type = REQ_OPEN; 1055 req->type = REQ_OPEN;
361 req->data = newSVsv (pathname); 1056 req->data = newSVsv (pathname);
362 req->dataptr = SvPV_nolen (req->data); 1057 req->dataptr = SvPVbyte_nolen (req->data);
363 req->fd = flags; 1058 req->fd = flags;
364 req->mode = mode; 1059 req->mode = mode;
365 req->callback = SvREFCNT_inc (callback);
366 1060
367 send_req (req); 1061 REQ_SEND;
368} 1062}
369 1063
370void 1064void
371aio_close(fh,callback) 1065aio_close (fh,callback=&PL_sv_undef)
372 InputStream fh 1066 SV * fh
373 SV * callback 1067 SV * callback
374 PROTOTYPE: $$ 1068 PROTOTYPE: $;$
375 ALIAS: 1069 ALIAS:
376 aio_close = REQ_CLOSE 1070 aio_close = REQ_CLOSE
377 aio_fsync = REQ_FSYNC 1071 aio_fsync = REQ_FSYNC
378 aio_fdatasync = REQ_FDATASYNC 1072 aio_fdatasync = REQ_FDATASYNC
379 CODE: 1073 PPCODE:
1074{
1075 dREQ;
1076
1077 req->type = ix;
1078 req->fh = newSVsv (fh);
1079 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1080
1081 REQ_SEND (req);
1082}
1083
1084void
1085aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1086 SV * fh
1087 UV offset
1088 UV length
1089 SV * data
1090 UV dataoffset
1091 SV * callback
1092 ALIAS:
1093 aio_read = REQ_READ
1094 aio_write = REQ_WRITE
1095 PROTOTYPE: $$$$$;$
1096 PPCODE:
380{ 1097{
381 aio_req req; 1098 aio_req req;
1099 STRLEN svlen;
1100 char *svptr = SvPVbyte (data, svlen);
382 1101
383 Newz (0, req, 1, aio_cb); 1102 SvUPGRADE (data, SVt_PV);
1103 SvPOK_on (data);
384 1104
385 if (!req) 1105 if (dataoffset < 0)
386 croak ("out of memory during aio_req allocation"); 1106 dataoffset += svlen;
387 1107
388 req->type = ix; 1108 if (dataoffset < 0 || dataoffset > svlen)
389 req->fd = PerlIO_fileno (fh); 1109 croak ("data offset outside of string");
390 req->callback = SvREFCNT_inc (callback);
391 1110
392 send_req (req); 1111 if (ix == REQ_WRITE)
393} 1112 {
394 1113 /* write: check length and adjust. */
395void 1114 if (length < 0 || length + dataoffset > svlen)
396aio_read(fh,offset,length,data,dataoffset,callback) 1115 length = svlen - dataoffset;
397 InputStream fh 1116 }
398 UV offset 1117 else
399 IV length 1118 {
400 SV * data 1119 /* read: grow scalar as necessary */
401 IV dataoffset 1120 svptr = SvGROW (data, length + dataoffset);
402 SV * callback 1121 }
403 PROTOTYPE: $$$$$$
404 CODE:
405 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407void
408aio_write(fh,offset,length,data,dataoffset,callback)
409 OutputStream fh
410 UV offset
411 IV length
412 SV * data
413 IV dataoffset
414 SV * callback
415 PROTOTYPE: $$$$$$
416 CODE:
417 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
418
419void
420aio_readahead(fh,offset,length,callback)
421 InputStream fh
422 UV offset
423 IV length
424 SV * callback
425 PROTOTYPE: $$$$
426 CODE:
427{
428 aio_req req;
429 1122
430 if (length < 0) 1123 if (length < 0)
431 croak ("length must not be negative"); 1124 croak ("length must not be negative");
432 1125
433 Newz (0, req, 1, aio_cb); 1126 {
1127 dREQ;
434 1128
435 if (!req) 1129 req->type = ix;
436 croak ("out of memory during aio_req allocation"); 1130 req->fh = newSVsv (fh);
1131 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1132 : IoOFP (sv_2io (fh)));
1133 req->offset = offset;
1134 req->length = length;
1135 req->data = SvREFCNT_inc (data);
1136 req->dataptr = (char *)svptr + dataoffset;
1137
1138 if (!SvREADONLY (data))
1139 {
1140 SvREADONLY_on (data);
1141 req->data2ptr = (void *)data;
1142 }
1143
1144 REQ_SEND;
1145 }
1146}
1147
1148void
1149aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1150 SV * out_fh
1151 SV * in_fh
1152 UV in_offset
1153 UV length
1154 SV * callback
1155 PROTOTYPE: $$$$;$
1156 PPCODE:
1157{
1158 dREQ;
1159
1160 req->type = REQ_SENDFILE;
1161 req->fh = newSVsv (out_fh);
1162 req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1163 req->fh2 = newSVsv (in_fh);
1164 req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1165 req->offset = in_offset;
1166 req->length = length;
1167
1168 REQ_SEND;
1169}
1170
1171void
1172aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1173 SV * fh
1174 UV offset
1175 IV length
1176 SV * callback
1177 PROTOTYPE: $$$;$
1178 PPCODE:
1179{
1180 dREQ;
437 1181
438 req->type = REQ_READAHEAD; 1182 req->type = REQ_READAHEAD;
1183 req->fh = newSVsv (fh);
439 req->fd = PerlIO_fileno (fh); 1184 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
440 req->offset = offset; 1185 req->offset = offset;
441 req->length = length; 1186 req->length = length;
442 req->callback = SvREFCNT_inc (callback);
443 1187
444 send_req (req); 1188 REQ_SEND;
445} 1189}
446 1190
447void 1191void
448aio_stat(fh_or_path,callback) 1192aio_stat (fh_or_path,callback=&PL_sv_undef)
449 SV * fh_or_path 1193 SV * fh_or_path
450 SV * callback 1194 SV * callback
451 PROTOTYPE: $$
452 ALIAS: 1195 ALIAS:
1196 aio_stat = REQ_STAT
453 aio_lstat = 1 1197 aio_lstat = REQ_LSTAT
454 CODE: 1198 PPCODE:
455{ 1199{
456 aio_req req; 1200 dREQ;
457
458 Newz (0, req, 1, aio_cb);
459
460 if (!req)
461 croak ("out of memory during aio_req allocation");
462 1201
463 New (0, req->statdata, 1, Stat_t); 1202 New (0, req->statdata, 1, Stat_t);
464
465 if (!req->statdata) 1203 if (!req->statdata)
1204 {
1205 req_free (req);
466 croak ("out of memory during aio_req->statdata allocation"); 1206 croak ("out of memory during aio_req->statdata allocation");
1207 }
467 1208
468 if (SvPOK (fh_or_path)) 1209 if (SvPOK (fh_or_path))
469 { 1210 {
470 req->type = ix ? REQ_LSTAT : REQ_STAT; 1211 req->type = ix;
471 req->data = newSVsv (fh_or_path); 1212 req->data = newSVsv (fh_or_path);
472 req->dataptr = SvPV_nolen (req->data); 1213 req->dataptr = SvPVbyte_nolen (req->data);
473 } 1214 }
474 else 1215 else
475 { 1216 {
476 req->type = REQ_FSTAT; 1217 req->type = REQ_FSTAT;
1218 req->fh = newSVsv (fh_or_path);
477 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 1219 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
478 } 1220 }
479 1221
480 req->callback = SvREFCNT_inc (callback); 1222 REQ_SEND;
481
482 send_req (req);
483} 1223}
484 1224
485void 1225void
486aio_unlink(pathname,callback) 1226aio_unlink (pathname,callback=&PL_sv_undef)
487 SV * pathname 1227 SV * pathname
488 SV * callback 1228 SV * callback
1229 ALIAS:
1230 aio_unlink = REQ_UNLINK
1231 aio_rmdir = REQ_RMDIR
1232 aio_readdir = REQ_READDIR
1233 PPCODE:
1234{
1235 dREQ;
1236
1237 req->type = ix;
1238 req->data = newSVsv (pathname);
1239 req->dataptr = SvPVbyte_nolen (req->data);
1240
1241 REQ_SEND;
1242}
1243
1244void
1245aio_link (oldpath,newpath,callback=&PL_sv_undef)
1246 SV * oldpath
1247 SV * newpath
1248 SV * callback
1249 ALIAS:
1250 aio_link = REQ_LINK
1251 aio_symlink = REQ_SYMLINK
1252 aio_rename = REQ_RENAME
1253 PPCODE:
1254{
1255 dREQ;
1256
1257 req->type = ix;
1258 req->fh = newSVsv (oldpath);
1259 req->data2ptr = SvPVbyte_nolen (req->fh);
1260 req->data = newSVsv (newpath);
1261 req->dataptr = SvPVbyte_nolen (req->data);
1262
1263 REQ_SEND;
1264}
1265
1266void
1267aio_sleep (delay,callback=&PL_sv_undef)
1268 double delay
1269 SV * callback
1270 PPCODE:
1271{
1272 dREQ;
1273
1274 req->type = REQ_SLEEP;
1275 req->fd = delay < 0. ? 0 : delay;
1276 req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1277
1278 REQ_SEND;
1279}
1280
1281void
1282aio_group (callback=&PL_sv_undef)
1283 SV * callback
489 PROTOTYPE: $$ 1284 PROTOTYPE: ;$
1285 PPCODE:
1286{
1287 dREQ;
1288
1289 req->type = REQ_GROUP;
1290 req_send (req);
1291
1292 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1293}
1294
1295void
1296aio_nop (callback=&PL_sv_undef)
1297 SV * callback
1298 PPCODE:
1299{
1300 dREQ;
1301
1302 req->type = REQ_NOP;
1303
1304 REQ_SEND;
1305}
1306
1307void
1308aioreq_pri (int pri = DEFAULT_PRI)
490 CODE: 1309 CODE:
491{ 1310 if (pri < PRI_MIN) pri = PRI_MIN;
492 aio_req req; 1311 if (pri > PRI_MAX) pri = PRI_MAX;
493 1312 next_pri = pri + PRI_BIAS;
494 Newz (0, req, 1, aio_cb); 1313
495 1314void
496 if (!req) 1315flush ()
497 croak ("out of memory during aio_req allocation"); 1316 PROTOTYPE:
498 1317 CODE:
499 req->type = REQ_UNLINK; 1318 while (nreqs)
500 req->data = newSVsv (pathname); 1319 {
501 req->dataptr = SvPV_nolen (req->data); 1320 poll_wait ();
502 req->callback = SvREFCNT_inc (callback); 1321 poll_cb ();
503 1322 }
504 send_req (req); 1323
505} 1324void
1325poll()
1326 PROTOTYPE:
1327 CODE:
1328 if (nreqs)
1329 {
1330 poll_wait ();
1331 poll_cb ();
1332 }
506 1333
507int 1334int
508poll_fileno() 1335poll_fileno()
509 PROTOTYPE: 1336 PROTOTYPE:
510 CODE: 1337 CODE:
511 RETVAL = respipe[0]; 1338 RETVAL = respipe [0];
512 OUTPUT: 1339 OUTPUT:
513 RETVAL 1340 RETVAL
514 1341
515int 1342int
516poll_cb(...) 1343poll_cb(...)
517 PROTOTYPE: 1344 PROTOTYPE:
518 CODE: 1345 CODE:
519 RETVAL = poll_cb (aTHX); 1346 RETVAL = poll_cb ();
520 OUTPUT: 1347 OUTPUT:
521 RETVAL 1348 RETVAL
522 1349
523void 1350void
524poll_wait() 1351poll_wait()
525 PROTOTYPE: 1352 PROTOTYPE:
526 CODE: 1353 CODE:
1354 if (nreqs)
527 poll_wait (); 1355 poll_wait ();
528 1356
529int 1357int
530nreqs() 1358nreqs()
531 PROTOTYPE: 1359 PROTOTYPE:
532 CODE: 1360 CODE:
533 RETVAL = nreqs; 1361 RETVAL = nreqs;
534 OUTPUT: 1362 OUTPUT:
535 RETVAL 1363 RETVAL
536 1364
1365PROTOTYPES: DISABLE
1366
1367MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1368
1369void
1370cancel (aio_req_ornot req)
1371 CODE:
1372 req_cancel (req);
1373
1374void
1375cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1376 CODE:
1377 SvREFCNT_dec (req->callback);
1378 req->callback = newSVsv (callback);
1379
1380MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1381
1382void
1383add (aio_req grp, ...)
1384 PPCODE:
1385{
1386 int i;
1387 aio_req req;
1388
1389 if (grp->fd == 2)
1390 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1391
1392 for (i = 1; i < items; ++i )
1393 {
1394 if (GIMME_V != G_VOID)
1395 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1396
1397 req = SvAIO_REQ (ST (i));
1398
1399 if (req)
1400 {
1401 ++grp->length;
1402 req->grp = grp;
1403
1404 req->grp_prev = 0;
1405 req->grp_next = grp->grp_first;
1406
1407 if (grp->grp_first)
1408 grp->grp_first->grp_prev = req;
1409
1410 grp->grp_first = req;
1411 }
1412 }
1413}
1414
1415void
1416result (aio_req grp, ...)
1417 CODE:
1418{
1419 int i;
1420 AV *av = newAV ();
1421
1422 for (i = 1; i < items; ++i )
1423 av_push (av, newSVsv (ST (i)));
1424
1425 SvREFCNT_dec (grp->data);
1426 grp->data = (SV *)av;
1427}
1428
1429void
1430limit (aio_req grp, int limit)
1431 CODE:
1432 grp->fd2 = limit;
1433 aio_grp_feed (grp);
1434
1435void
1436feed (aio_req grp, SV *callback=&PL_sv_undef)
1437 CODE:
1438{
1439 SvREFCNT_dec (grp->fh2);
1440 grp->fh2 = newSVsv (callback);
1441
1442 if (grp->fd2 <= 0)
1443 grp->fd2 = 2;
1444
1445 aio_grp_feed (grp);
1446}
1447

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