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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 1.153 by root, Wed Jul 15 01:36:04 2009 UTC

1#define PERL_NO_GET_CONTEXT 1#include "libeio/xthread.h"
2
3#include <errno.h>
2 4
3#include "EXTERN.h" 5#include "EXTERN.h"
4#include "perl.h" 6#include "perl.h"
5#include "XSUB.h" 7#include "XSUB.h"
6 8
9#include "schmorp.h"
10
11#include <stddef.h>
12#include <stdlib.h>
13#include <errno.h>
7#include <sys/types.h> 14#include <sys/types.h>
8#include <sys/stat.h> 15#include <sys/stat.h>
9#include <unistd.h> 16#include <limits.h>
10#include <fcntl.h> 17#include <fcntl.h>
11#include <signal.h>
12#include <sched.h> 18#include <sched.h>
13#include <endian.h>
14 19
15#include <pthread.h> 20/* perl namespace pollution */
16#include <sys/syscall.h> 21#undef VERSION
17 22
18typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 23#ifdef _WIN32
19typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
20typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
21 24
22#if __i386 || __amd64 25# define EIO_STRUCT_DIRENT Direntry_t
23# define STACKSIZE ( 256 * sizeof (long)) 26# undef malloc
24#elif __ia64 27# undef free
25# define STACKSIZE (8192 * sizeof (long)) 28
29// perl overrides all those nice win32 functions
30# undef open
31# undef read
32# undef write
33# undef send
34# undef recv
35# undef stat
36# undef fstat
37# define lstat stat
38# undef truncate
39# undef ftruncate
40# undef open
41# undef close
42# undef unlink
43# undef rmdir
44# undef rename
45# undef lseek
46
47# define chown(a,b,c) (errno = ENOSYS, -1)
48# define fchown(a,b,c) (errno = ENOSYS, -1)
49# define fchmod(a,b) (errno = ENOSYS, -1)
50# define symlink(a,b) (errno = ENOSYS, -1)
51# define readlink(a,b,c) (errno = ENOSYS, -1)
52# define mknod(a,b,c) (errno = ENOSYS, -1)
53# define truncate(a,b) (errno = ENOSYS, -1)
54# define ftruncate(fd,o) chsize ((fd), (o))
55# define fsync(fd) _commit (fd)
56# define opendir(fd) (errno = ENOSYS, 0)
57# define readdir(fd) (errno = ENOSYS, -1)
58# define closedir(fd) (errno = ENOSYS, -1)
59# define mkdir(a,b) mkdir (a)
60
26#else 61#else
27# define STACKSIZE ( 512 * sizeof (long)) 62
63# include <sys/time.h>
64# include <sys/select.h>
65# include <unistd.h>
66# include <utime.h>
67# include <signal.h>
68# define EIO_STRUCT_DIRENT struct dirent
69
28#endif 70#endif
29 71
72/* perl stupidly overrides readdir and maybe others */
73/* with thread-unsafe versions, imagine that :( */
74#undef readdir
75#undef opendir
76#undef closedir
77
78#define EIO_STRUCT_STAT Stat_t
79
80/* use NV for 32 bit perls as it allows larger offsets */
81#if IVSIZE >= 8
82# define VAL64 IV
83# define SvVAL64 SvIV
84# define newSVval64 newSViv
85#else
86# define VAL64 NV
87# define SvVAL64 SvNV
88# define newSVval64 newSVnv
89#endif
90
91/*****************************************************************************/
92
93#if __GNUC__ >= 3
94# define expect(expr,value) __builtin_expect ((expr),(value))
95#else
96# define expect(expr,value) (expr)
97#endif
98
99#define expect_false(expr) expect ((expr) != 0, 0)
100#define expect_true(expr) expect ((expr) != 0, 1)
101
102/*****************************************************************************/
103
104static HV *stash;
105typedef SV SV8; /* byte-sv, used for argument-checking */
106typedef int aio_rfd; /* read file desriptor */
107typedef int aio_wfd; /* write file descriptor */
108
109#define AIO_REQ_KLASS "IO::AIO::REQ"
110#define AIO_GRP_KLASS "IO::AIO::GRP"
111
112#define EIO_REQ_MEMBERS \
113 SV *callback; \
114 SV *sv1, *sv2; \
115 STRLEN stroffset; \
116 SV *self;
117
118#define EIO_NO_WRAPPERS 1
119
120#include "libeio/eio.h"
121
122#ifndef POSIX_FADV_NORMAL
123# define POSIX_FADV_NORMAL 0
124# define NO_FADVISE 1
125#endif
126
127#ifndef POSIX_FADV_SEQUENTIAL
128# define POSIX_FADV_SEQUENTIAL 0
129#endif
130
131#ifndef POSIX_FADV_RANDOM
132# define POSIX_FADV_RANDOM 0
133#endif
134
135#ifndef POSIX_FADV_NOREUSE
136# define POSIX_FADV_NOREUSE 0
137#endif
138
139#ifndef POSIX_FADV_WILLNEED
140# define POSIX_FADV_WILLNEED 0
141#endif
142
143#ifndef POSIX_FADV_DONTNEED
144# define POSIX_FADV_DONTNEED 0
145#endif
146
147static int req_invoke (eio_req *req);
148#define EIO_FINISH(req) req_invoke (req)
149static void req_destroy (eio_req *grp);
150#define EIO_DESTROY(req) req_destroy (req)
151
30enum { 152enum {
31 REQ_QUIT, 153 FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32 REQ_OPEN, REQ_CLOSE,
33 REQ_READ, REQ_WRITE, REQ_READAHEAD,
34 REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
35 REQ_FSYNC, REQ_FDATASYNC,
36}; 154};
37 155
38typedef struct aio_cb { 156#include "libeio/eio.c"
39 struct aio_cb *next;
40 157
41 int type;
42
43 int fd;
44 off_t offset;
45 size_t length;
46 ssize_t result;
47 mode_t mode; /* open */
48 int errorno;
49 SV *data, *callback;
50 void *dataptr;
51 STRLEN dataoffset;
52
53 Stat_t *statdata;
54} aio_cb;
55
56typedef aio_cb *aio_req; 158typedef eio_req *aio_req;
159typedef eio_req *aio_req_ornot;
57 160
58static int started; 161static SV *on_next_submit;
59static int nreqs; 162static int next_pri = EIO_PRI_DEFAULT;
60static int reqpipe[2], respipe[2]; 163static int max_outstanding;
61 164
62static aio_req qs, qe; /* queue start, queue end */ 165static int respipe_osf [2];
166static s_epipe respipe;
63 167
64static void *aio_proc(void *arg); 168static void req_destroy (aio_req req);
169static void req_cancel (aio_req req);
65 170
66static void 171static void want_poll (void)
67start_thread (void)
68{ 172{
69 sigset_t fullsigset, oldsigset; 173 /* write a dummy byte to the pipe so fh becomes ready */
70 pthread_t tid; 174 s_epipe_signal (&respipe);
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} 175}
85 176
86static void 177static void done_poll (void)
87send_reqs (void)
88{ 178{
89 /* this write is atomic */ 179 /* read any signals sent by the worker threads */
90 while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs) 180 s_epipe_drain (&respipe);
91 {
92 qs = qs->next;
93 if (!qs) qe = 0;
94 }
95} 181}
96 182
97static void 183/* must be called at most once */
98send_req (aio_req req) 184static SV *req_sv (aio_req req, const char *klass)
99{ 185{
100 nreqs++; 186 if (!req->self)
101 req->next = 0;
102
103 if (qe)
104 { 187 {
105 qe->next = req; 188 req->self = (SV *)newHV ();
106 qe = req; 189 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
107 } 190 }
108 else
109 qe = qs = req;
110 191
111 send_reqs (); 192 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
112} 193}
113 194
114static void 195static aio_req SvAIO_REQ (SV *sv)
115end_thread (void)
116{ 196{
117 aio_req req; 197 MAGIC *mg;
118 New (0, req, 1, aio_cb);
119 req->type = REQ_QUIT;
120 198
121 send_req (req); 199 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
122} 200 croak ("object of class " AIO_REQ_KLASS " expected");
123 201
124static void 202 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
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);
132 203
133 SvUPGRADE (data, SVt_PV); 204 return mg ? (aio_req)mg->mg_ptr : 0;
134 SvPOK_on (data); 205}
135 206
136 if (dataoffset < 0) 207static void aio_grp_feed (aio_req grp)
137 dataoffset += svlen; 208{
138 209 if (grp->sv2 && SvOK (grp->sv2))
139 if (dataoffset < 0 || dataoffset > svlen)
140 croak ("data offset outside of string");
141
142 if (dowrite)
143 { 210 {
144 /* write: check length and adjust. */ 211 dSP;
145 if (length < 0 || length + dataoffset > svlen) 212
146 length = svlen - dataoffset; 213 ENTER;
214 SAVETMPS;
215 PUSHMARK (SP);
216 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
217 PUTBACK;
218 call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
219 SPAGAIN;
220 FREETMPS;
221 LEAVE;
147 } 222 }
148 else 223}
224
225static void req_submit (eio_req *req)
226{
227 eio_submit (req);
228
229 if (expect_false (on_next_submit))
149 { 230 {
150 /* read: grow scalar as necessary */ 231 dSP;
151 svptr = SvGROW (data, length + dataoffset); 232 SV *cb = sv_2mortal (on_next_submit);
233
234 on_next_submit = 0;
235
236 PUSHMARK (SP);
237 PUTBACK;
238 call_sv (cb, G_DISCARD | G_EVAL);
152 } 239 }
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} 240}
172 241
173static void 242static int req_invoke (eio_req *req)
174poll_wait ()
175{
176 fd_set rfd;
177 FD_ZERO(&rfd);
178 FD_SET(respipe[0], &rfd);
179
180 select (respipe[0] + 1, &rfd, 0, 0, 0);
181}
182
183static int
184poll_cb (pTHX)
185{ 243{
186 dSP; 244 dSP;
187 int count = 0;
188 aio_req req;
189 245
190 while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req)) 246 if (req->flags & FLAG_SV2_RO_OFF)
247 SvREADONLY_off (req->sv2);
248
249 if (!EIO_CANCELLED (req) && req->callback)
191 { 250 {
192 nreqs--; 251 ENTER;
193 252 SAVETMPS;
194 if (req->type == REQ_QUIT)
195 started--;
196 else
197 {
198 int errorno = errno;
199 errno = req->errorno;
200
201 if (req->type == REQ_READ)
202 SvCUR_set (req->data, req->dataoffset
203 + req->result > 0 ? req->result : 0);
204
205 if (req->data)
206 SvREFCNT_dec (req->data);
207
208 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209 {
210 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211 PL_laststatval = req->result;
212 PL_statcache = *(req->statdata);
213
214 Safefree (req->statdata);
215 }
216
217 PUSHMARK (SP); 253 PUSHMARK (SP);
218 XPUSHs (sv_2mortal (newSViv (req->result))); 254 EXTEND (SP, 1);
219 PUTBACK;
220 call_sv (req->callback, G_VOID);
221 SPAGAIN;
222
223 if (req->callback)
224 SvREFCNT_dec (req->callback);
225
226 errno = errorno;
227 count++;
228 }
229
230 Safefree (req);
231 }
232
233 if (qs)
234 send_reqs ();
235
236 return count;
237}
238
239static void *
240aio_proc (void *thr_arg)
241{
242 aio_req req;
243
244 /* then loop */
245 while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
246 {
247 errno = 0; /* strictly unnecessary */
248 255
249 switch (req->type) 256 switch (req->type)
250 { 257 {
251 case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break; 258 case EIO_READDIR:
252 case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break; 259 {
253#if SYS_readahead 260 SV *rv = &PL_sv_undef;
254 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
255#else
256 case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
257#endif
258 261
259 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break; 262 if (req->result >= 0)
260 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break; 263 {
261 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break; 264 int i;
265 char *names = (char *)req->ptr2;
266 eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
267 AV *av = newAV ();
262 268
263 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break; 269 av_extend (av, req->result - 1);
264 case REQ_CLOSE: req->result = close (req->fd); break;
265 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
266 270
267 case REQ_FSYNC: req->result = fsync (req->fd); break; 271 for (i = 0; i < req->result; ++i)
268 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break; 272 {
273 if (req->int1 & EIO_READDIR_DENTS)
274 {
275 SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
269 276
277 if (req->int1 & EIO_READDIR_CUSTOM2)
278 {
279 static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
280 AV *avent = newAV ();
281
282 av_extend (avent, 2);
283
284 if (!sv_type [ent->type])
285 {
286 sv_type [ent->type] = newSViv (ent->type);
287 SvREADONLY_on (sv_type [ent->type]);
288 }
289
290 av_store (avent, 0, namesv);
291 av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
292 av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
293
294 av_store (av, i, newRV_noinc ((SV *)avent));
295 }
296 else
297 av_store (av, i, namesv);
298
299 ++ent;
300 }
301 else
302 {
303 SV *name = newSVpv (names, 0);
304 av_store (av, i, name);
305 names += SvCUR (name) + 1;
306 }
307 }
308
309 rv = sv_2mortal (newRV_noinc ((SV *)av));
310 }
311
312 PUSHs (rv);
313
314 if (req->int1 & EIO_READDIR_CUSTOM1)
315 XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
316 }
317 break;
318
319 case EIO_OPEN:
320 {
321 /* convert fd to fh */
322 SV *fh = &PL_sv_undef;
323
324 if (req->result >= 0)
325 {
326 GV *gv = (GV *)sv_newmortal ();
327 int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
328 char sym [64];
329 int symlen;
330
331 symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
332 gv_init (gv, stash, sym, symlen, 0);
333
334 symlen = snprintf (
335 sym,
336 sizeof (sym),
337 "%s&=%d",
338 flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
339 (int)req->result
340 );
341
342 if (do_open (gv, sym, symlen, 0, 0, 0, 0))
343 fh = (SV *)gv;
344 }
345
346 PUSHs (fh);
347 }
348 break;
349
350 case EIO_GROUP:
351 req->int1 = 2; /* mark group as finished */
352
353 if (req->sv1)
354 {
355 int i;
356 AV *av = (AV *)req->sv1;
357
358 EXTEND (SP, AvFILL (av) + 1);
359 for (i = 0; i <= AvFILL (av); ++i)
360 PUSHs (*av_fetch (av, i, 0));
361 }
362 break;
363
364 case EIO_NOP:
270 case REQ_QUIT: 365 case EIO_BUSY:
271 write (respipe[1], (void *)&req, sizeof (req)); 366 break;
272 return 0; 367
368 case EIO_READLINK:
369 if (req->result > 0)
370 PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
371 break;
372
373 case EIO_STAT:
374 case EIO_LSTAT:
375 case EIO_FSTAT:
376 PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
377 PL_laststatval = req->result;
378 PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
379 PUSHs (sv_2mortal (newSViv (req->result)));
380 break;
381
382 case EIO_READ:
383 {
384 SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
385 *SvEND (req->sv2) = 0;
386 SvPOK_only (req->sv2);
387 SvSETMAGIC (req->sv2);
388 PUSHs (sv_2mortal (newSViv (req->result)));
389 }
390 break;
391
392 case EIO_DUP2:
393 if (req->result > 0)
394 req->result = 0;
395 /* FALLTHROUGH */
273 396
274 default: 397 default:
275 req->result = ENOSYS; 398 PUSHs (sv_2mortal (newSViv (req->result)));
276 break; 399 break;
277 } 400 }
278 401
279 req->errorno = errno; 402 errno = req->errorno;
280 write (respipe[1], (void *)&req, sizeof (req)); 403
404 PUTBACK;
405 call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
406 SPAGAIN;
407
408 FREETMPS;
409 LEAVE;
410
411 PUTBACK;
281 } 412 }
282 413
414 return !!SvTRUE (ERRSV);
415}
416
417static void req_destroy (aio_req req)
418{
419 if (req->self)
420 {
421 sv_unmagic (req->self, PERL_MAGIC_ext);
422 SvREFCNT_dec (req->self);
423 }
424
425 SvREFCNT_dec (req->sv1);
426 SvREFCNT_dec (req->sv2);
427 SvREFCNT_dec (req->callback);
428
429 Safefree (req);
430}
431
432static void req_cancel_subs (aio_req grp)
433{
434 aio_req sub;
435
436 if (grp->type != EIO_GROUP)
283 return 0; 437 return;
438
439 SvREFCNT_dec (grp->sv2);
440 grp->sv2 = 0;
441
442 eio_grp_cancel (grp);
284} 443}
444
445static void
446create_respipe (void)
447{
448 if (s_epipe_renew (&respipe))
449 croak ("unable to initialize result pipe");
450
451 respipe_osf [0] = S_TO_SOCKET (respipe.fd [0]);
452 respipe_osf [1] = S_TO_SOCKET (respipe.fd [1]);
453}
454
455static void poll_wait (void)
456{
457 while (eio_nreqs ())
458 {
459 int size;
460
461 X_LOCK (reslock);
462 size = res_queue.size;
463 X_UNLOCK (reslock);
464
465 if (size)
466 return;
467
468 etp_maybe_start_thread ();
469
470 s_epipe_wait (&respipe);
471 }
472}
473
474static int poll_cb (void)
475{
476 for (;;)
477 {
478 int res = eio_poll ();
479
480 if (res > 0)
481 croak (0);
482
483 if (!max_outstanding || max_outstanding > eio_nreqs ())
484 return res;
485
486 poll_wait ();
487 }
488}
489
490static void atfork_child (void)
491{
492 create_respipe ();
493}
494
495static SV *
496get_cb (SV *cb_sv)
497{
498 SvGETMAGIC (cb_sv);
499 return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
500}
501
502#define dREQ \
503 SV *cb_cv; \
504 aio_req req; \
505 int req_pri = next_pri; \
506 next_pri = EIO_PRI_DEFAULT; \
507 \
508 cb_cv = get_cb (callback); \
509 \
510 Newz (0, req, 1, eio_req); \
511 if (!req) \
512 croak ("out of memory during eio_req allocation"); \
513 \
514 req->callback = SvREFCNT_inc (cb_cv); \
515 req->pri = req_pri
516
517#define REQ_SEND \
518 PUTBACK; \
519 req_submit (req); \
520 SPAGAIN; \
521 \
522 if (GIMME_V != G_VOID) \
523 XPUSHs (req_sv (req, AIO_REQ_KLASS));
285 524
286MODULE = IO::AIO PACKAGE = IO::AIO 525MODULE = IO::AIO PACKAGE = IO::AIO
287 526
527PROTOTYPES: ENABLE
528
288BOOT: 529BOOT:
289{ 530{
290 if (pipe (reqpipe) || pipe (respipe)) 531 static const struct {
291 croak ("unable to initialize request or result pipe"); 532 const char *name;
533 IV iv;
534 } *civ, const_iv[] = {
535# define const_iv(name, value) { # name, (IV) value },
536# define const_eio(name) { # name, (IV) EIO_ ## name },
537 const_iv (EXDEV , EXDEV)
538 const_iv (ENOSYS , ENOSYS)
539 const_iv (O_RDONLY, O_RDONLY)
540 const_iv (O_WRONLY, O_WRONLY)
541 const_iv (O_CREAT , O_CREAT)
542 const_iv (O_TRUNC , O_TRUNC)
543#ifndef _WIN32
544 const_iv (S_IFIFO , S_IFIFO)
545#endif
546 const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
547 const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
548 const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
549 const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
550 const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
551 const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
292 552
293 if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK)) 553 const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
294 croak ("cannot set result pipe to nonblocking mode"); 554 const_eio (SYNC_FILE_RANGE_WRITE)
555 const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
295 556
296 if (fcntl (respipe[0], F_SETFL, O_NONBLOCK)) 557 const_eio (READDIR_DENTS)
297 croak ("cannot set result pipe to nonblocking mode"); 558 const_eio (READDIR_DIRS_FIRST)
298} 559 const_eio (READDIR_STAT_ORDER)
560 const_eio (READDIR_FOUND_UNKNOWN)
299 561
562 const_eio (DT_UNKNOWN)
563 const_eio (DT_FIFO)
564 const_eio (DT_CHR)
565 const_eio (DT_DIR)
566 const_eio (DT_BLK)
567 const_eio (DT_REG)
568 const_eio (DT_LNK)
569 const_eio (DT_SOCK)
570 const_eio (DT_WHT)
571 };
572
573 stash = gv_stashpv ("IO::AIO", 1);
574
575 for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
576 newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
577
578 create_respipe ();
579
580 if (eio_init (want_poll, done_poll) < 0)
581 croak ("IO::AIO: unable to initialise eio library");
582
583 /* atfork child called in fifo order, so before eio's handler */
584 X_THREAD_ATFORK (0, 0, atfork_child);
585}
586
300void 587void
301min_parallel(nthreads) 588max_poll_reqs (int nreqs)
302 int nthreads
303 PROTOTYPE: $ 589 PROTOTYPE: $
304 CODE: 590 CODE:
305 while (nthreads > started) 591 eio_set_max_poll_reqs (nreqs);
306 start_thread ();
307 592
308void 593void
309max_parallel(nthreads) 594max_poll_time (double nseconds)
310 int nthreads
311 PROTOTYPE: $ 595 PROTOTYPE: $
312 CODE: 596 CODE:
597 eio_set_max_poll_time (nseconds);
598
599void
600min_parallel (int nthreads)
601 PROTOTYPE: $
602 CODE:
603 eio_set_min_parallel (nthreads);
604
605void
606max_parallel (int nthreads)
607 PROTOTYPE: $
608 CODE:
609 eio_set_max_parallel (nthreads);
610
611void
612max_idle (int nthreads)
613 PROTOTYPE: $
614 CODE:
615 eio_set_max_idle (nthreads);
616
617void
618max_outstanding (int maxreqs)
619 PROTOTYPE: $
620 CODE:
621 max_outstanding = maxreqs;
622
623void
624aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
625 PROTOTYPE: $$$;$
626 PPCODE:
313{ 627{
314 int cur = started; 628 dREQ;
315 while (cur > nthreads) 629
316 { 630 req->type = EIO_OPEN;
317 end_thread (); 631 req->sv1 = newSVsv (pathname);
632 req->ptr1 = SvPVbyte_nolen (req->sv1);
633 req->int1 = flags;
634 req->int2 = mode;
635
636 REQ_SEND;
637}
638
639void
640aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
641 PROTOTYPE: $;$
642 ALIAS:
643 aio_fsync = EIO_FSYNC
644 aio_fdatasync = EIO_FDATASYNC
645 PPCODE:
646{
647 int fd = s_fileno_croak (fh, 0);
648 dREQ;
649
650 req->type = ix;
651 req->sv1 = newSVsv (fh);
652 req->int1 = fd;
653
654 REQ_SEND (req);
655}
656
657void
658aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
659 PROTOTYPE: $$$$;$
660 PPCODE:
661{
662 int fd = s_fileno_croak (fh, 0);
663 dREQ;
664
665 req->type = EIO_SYNC_FILE_RANGE;
666 req->sv1 = newSVsv (fh);
667 req->int1 = fd;
668 req->offs = offset;
669 req->size = nbytes;
670 req->int2 = flags;
671
672 REQ_SEND (req);
673}
674
675void
676aio_close (SV *fh, SV *callback=&PL_sv_undef)
677 PROTOTYPE: $;$
678 PPCODE:
679{
680 static int close_pipe = -1; /* dummy fd to close fds via dup2 */
681 int fd = s_fileno_croak (fh, 0);
682 dREQ;
683
684 if (close_pipe < 0)
685 {
686 int pipefd [2];
687
688 if (pipe (pipefd) < 0
689 || close (pipefd [1]) < 0
690 || fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
691 abort (); /*D*/
692
693 close_pipe = pipefd [0];
694 }
695
696 req->type = EIO_DUP2;
697 req->int1 = close_pipe;
698 req->sv2 = newSVsv (fh);
699 req->int2 = fd;
700
701 REQ_SEND (req);
702}
703
704void
705aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
706 ALIAS:
707 aio_read = EIO_READ
708 aio_write = EIO_WRITE
709 PROTOTYPE: $$$$$;$
710 PPCODE:
711{
712 STRLEN svlen;
713 int fd = s_fileno_croak (fh, ix == EIO_WRITE);
714 char *svptr = SvPVbyte (data, svlen);
715 UV len = SvUV (length);
716
717 if (dataoffset < 0)
718 dataoffset += svlen;
719
720 if (dataoffset < 0 || dataoffset > svlen)
721 croak ("dataoffset outside of data scalar");
722
723 if (ix == EIO_WRITE)
724 {
725 /* write: check length and adjust. */
726 if (!SvOK (length) || len + dataoffset > svlen)
727 len = svlen - dataoffset;
728 }
729 else
730 {
731 /* read: check type and grow scalar as necessary */
732 SvUPGRADE (data, SVt_PV);
733 svptr = SvGROW (data, len + dataoffset + 1);
734 }
735
736 {
737 dREQ;
738
739 req->type = ix;
740 req->sv1 = newSVsv (fh);
741 req->int1 = fd;
742 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
743 req->size = len;
744 req->sv2 = SvREFCNT_inc (data);
745 req->ptr2 = (char *)svptr + dataoffset;
746 req->stroffset = dataoffset;
747
748 if (!SvREADONLY (data))
318 cur--; 749 {
750 SvREADONLY_on (data);
751 req->flags |= FLAG_SV2_RO_OFF;
319 } 752 }
320 753
321 while (started > nthreads) 754 REQ_SEND;
755 }
756}
757
758void
759aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
760 PROTOTYPE: $$;$
761 PPCODE:
762{
763 SV *data;
764 dREQ;
765
766 req->type = EIO_READLINK;
767 req->sv1 = newSVsv (path);
768 req->ptr1 = SvPVbyte_nolen (req->sv1);
769
770 REQ_SEND;
771}
772
773void
774aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
775 PROTOTYPE: $$$$;$
776 PPCODE:
777{
778 int ifd = s_fileno_croak (in_fh , 0);
779 int ofd = s_fileno_croak (out_fh, 1);
780 dREQ;
781
782 req->type = EIO_SENDFILE;
783 req->sv1 = newSVsv (out_fh);
784 req->int1 = ofd;
785 req->sv2 = newSVsv (in_fh);
786 req->int2 = ifd;
787 req->offs = in_offset;
788 req->size = length;
789
790 REQ_SEND;
791}
792
793void
794aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
795 PROTOTYPE: $$$;$
796 PPCODE:
797{
798 int fd = s_fileno_croak (fh, 0);
799 dREQ;
800
801 req->type = EIO_READAHEAD;
802 req->sv1 = newSVsv (fh);
803 req->int1 = fd;
804 req->offs = offset;
805 req->size = length;
806
807 REQ_SEND;
808}
809
810void
811aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
812 ALIAS:
813 aio_stat = EIO_STAT
814 aio_lstat = EIO_LSTAT
815 PPCODE:
816{
817 dREQ;
818
819 req->sv1 = newSVsv (fh_or_path);
820
821 if (SvPOK (req->sv1))
822 {
823 req->type = ix;
824 req->ptr1 = SvPVbyte_nolen (req->sv1);
825 }
826 else
827 {
828 req->type = EIO_FSTAT;
829 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
830 }
831
832 REQ_SEND;
833}
834
835void
836aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
837 PPCODE:
838{
839 dREQ;
840
841 req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
842 req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
843 req->sv1 = newSVsv (fh_or_path);
844
845 if (SvPOK (req->sv1))
846 {
847 req->type = EIO_UTIME;
848 req->ptr1 = SvPVbyte_nolen (req->sv1);
849 }
850 else
851 {
852 req->type = EIO_FUTIME;
853 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
854 }
855
856 REQ_SEND;
857}
858
859void
860aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
861 PPCODE:
862{
863 dREQ;
864
865 req->sv1 = newSVsv (fh_or_path);
866 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
867
868 if (SvPOK (req->sv1))
869 {
870 req->type = EIO_TRUNCATE;
871 req->ptr1 = SvPVbyte_nolen (req->sv1);
872 }
873 else
874 {
875 req->type = EIO_FTRUNCATE;
876 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
877 }
878
879 REQ_SEND;
880}
881
882void
883aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
884 ALIAS:
885 aio_chmod = EIO_CHMOD
886 aio_mkdir = EIO_MKDIR
887 PPCODE:
888{
889 dREQ;
890
891 req->int2 = mode;
892 req->sv1 = newSVsv (fh_or_path);
893
894 if (SvPOK (req->sv1))
895 {
896 req->type = ix;
897 req->ptr1 = SvPVbyte_nolen (req->sv1);
898 }
899 else
900 {
901 req->type = EIO_FCHMOD;
902 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
903 }
904
905 REQ_SEND;
906}
907
908void
909aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
910 PPCODE:
911{
912 dREQ;
913
914 req->int2 = SvOK (uid) ? SvIV (uid) : -1;
915 req->int3 = SvOK (gid) ? SvIV (gid) : -1;
916 req->sv1 = newSVsv (fh_or_path);
917
918 if (SvPOK (req->sv1))
919 {
920 req->type = EIO_CHOWN;
921 req->ptr1 = SvPVbyte_nolen (req->sv1);
922 }
923 else
924 {
925 req->type = EIO_FCHOWN;
926 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
927 }
928
929 REQ_SEND;
930}
931
932void
933aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
934 PPCODE:
935{
936 dREQ;
937
938 req->type = EIO_READDIR;
939 req->sv1 = newSVsv (pathname);
940 req->ptr1 = SvPVbyte_nolen (req->sv1);
941 req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
942
943 if (flags & EIO_READDIR_DENTS)
944 req->int1 |= EIO_READDIR_CUSTOM2;
945
946 REQ_SEND;
947}
948
949void
950aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
951 ALIAS:
952 aio_unlink = EIO_UNLINK
953 aio_rmdir = EIO_RMDIR
954 aio_readdir = EIO_READDIR
955 PPCODE:
956{
957 dREQ;
958
959 req->type = ix;
960 req->sv1 = newSVsv (pathname);
961 req->ptr1 = SvPVbyte_nolen (req->sv1);
962
963 REQ_SEND;
964}
965
966void
967aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
968 ALIAS:
969 aio_link = EIO_LINK
970 aio_symlink = EIO_SYMLINK
971 aio_rename = EIO_RENAME
972 PPCODE:
973{
974 dREQ;
975
976 req->type = ix;
977 req->sv1 = newSVsv (oldpath);
978 req->ptr1 = SvPVbyte_nolen (req->sv1);
979 req->sv2 = newSVsv (newpath);
980 req->ptr2 = SvPVbyte_nolen (req->sv2);
981
982 REQ_SEND;
983}
984
985void
986aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
987 PPCODE:
988{
989 dREQ;
990
991 req->type = EIO_MKNOD;
992 req->sv1 = newSVsv (pathname);
993 req->ptr1 = SvPVbyte_nolen (req->sv1);
994 req->int2 = (mode_t)mode;
995 req->offs = dev;
996
997 REQ_SEND;
998}
999
1000void
1001aio_busy (double delay, SV *callback=&PL_sv_undef)
1002 PPCODE:
1003{
1004 dREQ;
1005
1006 req->type = EIO_BUSY;
1007 req->nv1 = delay < 0. ? 0. : delay;
1008
1009 REQ_SEND;
1010}
1011
1012void
1013aio_group (SV *callback=&PL_sv_undef)
1014 PROTOTYPE: ;$
1015 PPCODE:
1016{
1017 dREQ;
1018
1019 req->type = EIO_GROUP;
1020
1021 req_submit (req);
1022 XPUSHs (req_sv (req, AIO_GRP_KLASS));
1023}
1024
1025void
1026aio_nop (SV *callback=&PL_sv_undef)
1027 ALIAS:
1028 aio_nop = EIO_NOP
1029 aio_sync = EIO_SYNC
1030 PPCODE:
1031{
1032 dREQ;
1033
1034 req->type = ix;
1035
1036 REQ_SEND;
1037}
1038
1039int
1040aioreq_pri (int pri = 0)
1041 PROTOTYPE: ;$
1042 CODE:
1043 RETVAL = next_pri;
1044 if (items > 0)
1045 {
1046 if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1047 if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1048 next_pri = pri;
1049 }
1050 OUTPUT:
1051 RETVAL
1052
1053void
1054aioreq_nice (int nice = 0)
1055 CODE:
1056 nice = next_pri - nice;
1057 if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1058 if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1059 next_pri = nice;
1060
1061void
1062flush ()
1063 PROTOTYPE:
1064 CODE:
1065 while (eio_nreqs ())
322 { 1066 {
323 poll_wait (); 1067 poll_wait ();
324 poll_cb (aTHX); 1068 poll_cb ();
325 }
326}
327
328void
329aio_open(pathname,flags,mode,callback)
330 SV * pathname
331 int flags
332 int mode
333 SV * callback
334 PROTOTYPE: $$$$
335 CODE:
336{
337 aio_req req;
338
339 Newz (0, req, 1, aio_cb);
340
341 if (!req)
342 croak ("out of memory during aio_req allocation");
343
344 req->type = REQ_OPEN;
345 req->data = newSVsv (pathname);
346 req->dataptr = SvPV_nolen (req->data);
347 req->fd = flags;
348 req->mode = mode;
349 req->callback = SvREFCNT_inc (callback);
350
351 send_req (req);
352}
353
354void
355aio_close(fh,callback)
356 InputStream fh
357 SV * callback
358 PROTOTYPE: $$
359 ALIAS:
360 aio_close = REQ_CLOSE
361 aio_fsync = REQ_FSYNC
362 aio_fdatasync = REQ_FDATASYNC
363 CODE:
364{
365 aio_req req;
366
367 Newz (0, req, 1, aio_cb);
368
369 if (!req)
370 croak ("out of memory during aio_req allocation");
371
372 req->type = ix;
373 req->fd = PerlIO_fileno (fh);
374 req->callback = SvREFCNT_inc (callback);
375
376 send_req (req);
377}
378
379void
380aio_read(fh,offset,length,data,dataoffset,callback)
381 InputStream fh
382 UV offset
383 IV length
384 SV * data
385 IV dataoffset
386 SV * callback
387 PROTOTYPE: $$$$$$
388 CODE:
389 read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
390
391void
392aio_write(fh,offset,length,data,dataoffset,callback)
393 OutputStream fh
394 UV offset
395 IV length
396 SV * data
397 IV dataoffset
398 SV * callback
399 PROTOTYPE: $$$$$$
400 CODE:
401 read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
402
403void
404aio_readahead(fh,offset,length,callback)
405 InputStream fh
406 UV offset
407 IV length
408 SV * callback
409 PROTOTYPE: $$$$
410 CODE:
411{
412 aio_req req;
413
414 if (length < 0)
415 croak ("length must not be negative");
416
417 Newz (0, req, 1, aio_cb);
418
419 if (!req)
420 croak ("out of memory during aio_req allocation");
421
422 req->type = REQ_READAHEAD;
423 req->fd = PerlIO_fileno (fh);
424 req->offset = offset;
425 req->length = length;
426 req->callback = SvREFCNT_inc (callback);
427
428 send_req (req);
429}
430
431void
432aio_stat(fh_or_path,callback)
433 SV * fh_or_path
434 SV * callback
435 PROTOTYPE: $$
436 ALIAS:
437 aio_lstat = 1
438 CODE:
439{
440 aio_req req;
441
442 Newz (0, req, 1, aio_cb);
443
444 if (!req)
445 croak ("out of memory during aio_req allocation");
446
447 New (0, req->statdata, 1, Stat_t);
448
449 if (!req->statdata)
450 croak ("out of memory during aio_req->statdata allocation");
451
452 if (SvPOK (fh_or_path))
453 { 1069 }
454 req->type = ix ? REQ_LSTAT : REQ_STAT;
455 req->data = newSVsv (fh_or_path);
456 req->dataptr = SvPV_nolen (req->data);
457 }
458 else
459 {
460 req->type = REQ_FSTAT;
461 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
462 }
463 1070
464 req->callback = SvREFCNT_inc (callback); 1071int
465 1072poll()
466 send_req (req);
467}
468
469void
470aio_unlink(pathname,callback)
471 SV * pathname
472 SV * callback
473 PROTOTYPE: $$ 1073 PROTOTYPE:
474 CODE: 1074 CODE:
475{ 1075 poll_wait ();
476 aio_req req; 1076 RETVAL = poll_cb ();
477 1077 OUTPUT:
478 Newz (0, req, 1, aio_cb); 1078 RETVAL
479
480 if (!req)
481 croak ("out of memory during aio_req allocation");
482
483 req->type = REQ_UNLINK;
484 req->data = newSVsv (pathname);
485 req->dataptr = SvPV_nolen (req->data);
486 req->callback = SvREFCNT_inc (callback);
487
488 send_req (req);
489}
490 1079
491int 1080int
492poll_fileno() 1081poll_fileno()
493 PROTOTYPE: 1082 PROTOTYPE:
494 CODE: 1083 CODE:
495 RETVAL = respipe[0]; 1084 RETVAL = s_epipe_fd (&respipe);
496 OUTPUT: 1085 OUTPUT:
497 RETVAL 1086 RETVAL
498 1087
499int 1088int
500poll_cb(...) 1089poll_cb(...)
501 PROTOTYPE: 1090 PROTOTYPE:
502 CODE: 1091 CODE:
503 RETVAL = poll_cb (aTHX); 1092 RETVAL = poll_cb ();
504 OUTPUT: 1093 OUTPUT:
505 RETVAL 1094 RETVAL
506 1095
507void 1096void
508poll_wait() 1097poll_wait()
… …
512 1101
513int 1102int
514nreqs() 1103nreqs()
515 PROTOTYPE: 1104 PROTOTYPE:
516 CODE: 1105 CODE:
517 RETVAL = nreqs; 1106 RETVAL = eio_nreqs ();
518 OUTPUT: 1107 OUTPUT:
519 RETVAL 1108 RETVAL
520 1109
1110int
1111nready()
1112 PROTOTYPE:
1113 CODE:
1114 RETVAL = eio_nready ();
1115 OUTPUT:
1116 RETVAL
1117
1118int
1119npending()
1120 PROTOTYPE:
1121 CODE:
1122 RETVAL = eio_npending ();
1123 OUTPUT:
1124 RETVAL
1125
1126int
1127nthreads()
1128 PROTOTYPE:
1129 CODE:
1130 RETVAL = eio_nthreads ();
1131 OUTPUT:
1132 RETVAL
1133
1134int
1135fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
1136 PROTOTYPE: $$$$
1137 CODE:
1138#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
1139 RETVAL = posix_fadvise (fh, offset, length, advice);
1140#else
1141 RETVAL = errno = ENOSYS;
1142#endif
1143 OUTPUT:
1144 RETVAL
1145
1146ssize_t
1147sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
1148 PROTOTYPE: $$$$
1149 CODE:
1150 eio_sendfile_sync (ofh, ifh, offset, count);
1151
1152void _on_next_submit (SV *cb)
1153 CODE:
1154 SvREFCNT_dec (on_next_submit);
1155 on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
1156
1157PROTOTYPES: DISABLE
1158
1159MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1160
1161void
1162cancel (aio_req_ornot req)
1163 CODE:
1164 eio_cancel (req);
1165
1166void
1167cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1168 PPCODE:
1169{
1170 if (GIMME_V != G_VOID)
1171 XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
1172
1173 if (items > 1)
1174 {
1175 SV *cb_cv =get_cb (callback);
1176
1177 SvREFCNT_dec (req->callback);
1178 req->callback = SvREFCNT_inc (cb_cv);
1179 }
1180}
1181
1182MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1183
1184void
1185add (aio_req grp, ...)
1186 PPCODE:
1187{
1188 int i;
1189
1190 if (grp->int1 == 2)
1191 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1192
1193 for (i = 1; i < items; ++i )
1194 {
1195 aio_req req;
1196
1197 if (GIMME_V != G_VOID)
1198 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1199
1200 req = SvAIO_REQ (ST (i));
1201
1202 if (req)
1203 eio_grp_add (grp, req);
1204 }
1205}
1206
1207void
1208cancel_subs (aio_req_ornot req)
1209 CODE:
1210 req_cancel_subs (req);
1211
1212void
1213result (aio_req grp, ...)
1214 CODE:
1215{
1216 int i;
1217 AV *av;
1218
1219 grp->errorno = errno;
1220
1221 av = newAV ();
1222 av_extend (av, items - 1);
1223
1224 for (i = 1; i < items; ++i )
1225 av_push (av, newSVsv (ST (i)));
1226
1227 SvREFCNT_dec (grp->sv1);
1228 grp->sv1 = (SV *)av;
1229}
1230
1231void
1232errno (aio_req grp, int errorno = errno)
1233 CODE:
1234 grp->errorno = errorno;
1235
1236void
1237limit (aio_req grp, int limit)
1238 CODE:
1239 eio_grp_limit (grp, limit);
1240
1241void
1242feed (aio_req grp, SV *callback=&PL_sv_undef)
1243 CODE:
1244{
1245 SvREFCNT_dec (grp->sv2);
1246 grp->sv2 = newSVsv (callback);
1247 grp->feed = aio_grp_feed;
1248
1249 if (grp->int2 <= 0)
1250 grp->int2 = 2;
1251
1252 eio_grp_limit (grp, grp->int2);
1253}
1254

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