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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 1.62 by root, Mon Oct 23 22:45:18 2006 UTC

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

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