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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.24 by root, Wed Aug 17 03:01:56 2005 UTC vs.
Revision 1.116 by root, Sat May 10 19:25:33 2008 UTC

1#define _REENTRANT 1 1#include "libeio/xthread.h"
2
2#include <errno.h> 3#include <errno.h>
3 4
4#include "EXTERN.h" 5#include "EXTERN.h"
5#include "perl.h" 6#include "perl.h"
6#include "XSUB.h" 7#include "XSUB.h"
7 8
8#include "autoconf/config.h" 9#include <stddef.h>
9 10#include <stdlib.h>
11#include <errno.h>
10#include <sys/types.h> 12#include <sys/types.h>
11#include <sys/stat.h> 13#include <sys/stat.h>
12
13#include <unistd.h> 14#include <limits.h>
14#include <fcntl.h> 15#include <fcntl.h>
15#include <signal.h>
16#include <sched.h> 16#include <sched.h>
17 17
18#include <pthread.h> 18#ifdef _WIN32
19 19
20typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 20# define EIO_STRUCT_DIRENT Direntry_t
21typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */ 21# undef malloc
22typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */ 22# undef free
23 23
24#if __ia64 24// perl overrides all those nice win32 functions
25# define STACKSIZE 65536 25# undef open
26# undef read
27# undef write
28# undef send
29# undef recv
30# undef stat
31# undef fstat
32# define lstat stat
33# undef truncate
34# undef ftruncate
35# undef open
36# undef close
37# undef unlink
38# undef rmdir
39# undef rename
40# undef lseek
41
42# define chown(a,b,c) (errno = ENOSYS, -1)
43# define fchown(a,b,c) (errno = ENOSYS, -1)
44# define fchmod(a,b) (errno = ENOSYS, -1)
45# define symlink(a,b) (errno = ENOSYS, -1)
46# define readlink(a,b,c) (errno = ENOSYS, -1)
47# define mknod(a,b,c) (errno = ENOSYS, -1)
48# define truncate(a,b) (errno = ENOSYS, -1)
49# define ftruncate(fd,o) chsize ((fd), (o))
50# define fsync(fd) _commit (fd)
51# define opendir(fd) (errno = ENOSYS, 0)
52# define readdir(fd) (errno = ENOSYS, -1)
53# define closedir(fd) (errno = ENOSYS, -1)
54# define mkdir(a,b) mkdir (a)
55
26#else 56#else
27# define STACKSIZE 4096 57
58# include <sys/time.h>
59# include <sys/select.h>
60# include <unistd.h>
61# include <utime.h>
62# include <signal.h>
63# define EIO_STRUCT_DIRENT struct dirent
64
28#endif 65#endif
29 66
67#define EIO_STRUCT_STAT Stat_t
68
69/* use NV for 32 bit perls as it allows larger offsets */
70#if IVSIZE >= 8
71# define SvVAL64 SvIV
72#else
73# define SvVAL64 SvNV
74#endif
75
76static HV *stash;
77typedef SV SV8; /* byte-sv, used for argument-checking */
78
79#define AIO_REQ_KLASS "IO::AIO::REQ"
80#define AIO_GRP_KLASS "IO::AIO::GRP"
81
82#define EIO_COMMON \
83 SV *callback; \
84 SV *sv1, *sv2; \
85 STRLEN stroffset; \
86 SV *self
87
88#include "libeio/eio.h"
89
90static int req_invoke (eio_req *req);
91#define EIO_FINISH(req) req_invoke (req)
92static void aio_grp_feed (eio_req *grp);
93#define EIO_FEED(req) aio_grp_feed (req)
94static void req_destroy (eio_req *grp);
95#define EIO_DESTROY(req) req_destroy (req)
96
30enum { 97enum {
31 REQ_QUIT, 98 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,
35 REQ_FSYNC, REQ_FDATASYNC,
36 REQ_UNLINK, REQ_RMDIR,
37 REQ_SYMLINK,
38}; 99};
39 100
40typedef struct aio_cb { 101#include "libeio/eio.c"
41 struct aio_cb *volatile next;
42 102
43 int type;
44
45 int fd;
46 off_t offset;
47 size_t length;
48 ssize_t result;
49 mode_t mode; /* open */
50 int errorno;
51 SV *data, *callback, *fh;
52 void *dataptr, *data2ptr;
53 STRLEN dataoffset;
54
55 Stat_t *statdata;
56} aio_cb;
57
58typedef aio_cb *aio_req; 103typedef eio_req *aio_req;
104typedef eio_req *aio_req_ornot;
59 105
60static int started;
61static volatile int nreqs;
62static int max_outstanding = 1<<30; 106static int max_outstanding = 0;
63static int respipe [2];
64 107
65static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER; 108static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
66static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69 109
70static volatile aio_req reqs, reqe; /* queue start, queue end */ 110static int respipe_osf [2], respipe [2] = { -1, -1 };
71static volatile aio_req ress, rese; /* queue start, queue end */
72 111
73static void 112static void req_destroy (aio_req req);
74poll_wait () 113static void req_cancel (aio_req req);
114
115static void want_poll (void)
75{ 116{
76 if (nreqs && !ress) 117 /* write a dummy byte to the pipe so fh becomes ready */
118 respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
119}
120
121static void done_poll (void)
122{
123 /* read any signals sent by the worker threads */
124 char buf [4];
125 while (respipe_read (respipe [0], buf, 4) == 4)
126 ;
127}
128
129/* must be called at most once */
130static SV *req_sv (aio_req req, const char *klass)
131{
132 if (!req->self)
77 { 133 {
78 fd_set rfd; 134 req->self = (SV *)newHV ();
79 FD_ZERO(&rfd); 135 sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80 FD_SET(respipe [0], &rfd);
81
82 select (respipe [0] + 1, &rfd, 0, 0, 0);
83 } 136 }
84}
85 137
86static int 138 return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
87poll_cb () 139}
140
141static aio_req SvAIO_REQ (SV *sv)
142{
143 MAGIC *mg;
144
145 if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
146 croak ("object of class " AIO_REQ_KLASS " expected");
147
148 mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
149
150 return mg ? (aio_req)mg->mg_ptr : 0;
151}
152
153static void aio_grp_feed (aio_req grp)
154{
155 if (grp->sv2 && SvOK (grp->sv2))
156 {
157 dSP;
158
159 ENTER;
160 SAVETMPS;
161 PUSHMARK (SP);
162 XPUSHs (req_sv (grp, AIO_GRP_KLASS));
163 PUTBACK;
164 call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
165 SPAGAIN;
166 FREETMPS;
167 LEAVE;
168 }
169}
170
171static int req_invoke (eio_req *req)
88{ 172{
89 dSP; 173 dSP;
90 int count = 0;
91 int do_croak = 0;
92 aio_req req, prv;
93 174
94 pthread_mutex_lock (&reslock); 175 if (req->flags & FLAG_SV2_RO_OFF)
176 SvREADONLY_off (req->sv2);
95 177
96 { 178 if (!EIO_CANCELLED (req) && SvOK (req->callback))
97 /* read any signals sent by the worker threads */
98 char buf [32];
99 while (read (respipe [0], buf, 32) == 32)
100 ;
101 }
102
103 req = ress;
104 ress = rese = 0;
105
106 pthread_mutex_unlock (&reslock);
107
108 while (req)
109 { 179 {
110 nreqs--; 180 ENTER;
181 SAVETMPS;
182 PUSHMARK (SP);
183 EXTEND (SP, 1);
111 184
112 if (req->type == REQ_QUIT) 185 switch (req->type)
113 started--;
114 else
115 { 186 {
116 int errorno = errno; 187 case EIO_READDIR:
117 errno = req->errorno;
118
119 if (req->type == REQ_READ)
120 SvCUR_set (req->data, req->dataoffset
121 + req->result > 0 ? req->result : 0);
122
123 if (req->data)
124 SvREFCNT_dec (req->data);
125
126 if (req->fh)
127 SvREFCNT_dec (req->fh);
128
129 if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
130 { 188 {
131 PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT; 189 SV *rv = &PL_sv_undef;
132 PL_laststatval = req->result;
133 PL_statcache = *(req->statdata);
134 190
135 Safefree (req->statdata); 191 if (req->result >= 0)
192 {
193 int i;
194 char *buf = req->ptr2;
195 AV *av = newAV ();
196
197 av_extend (av, req->result - 1);
198
199 for (i = 0; i < req->result; ++i)
200 {
201 SV *sv = newSVpv (buf, 0);
202
203 av_store (av, i, sv);
204 buf += SvCUR (sv) + 1;
205 }
206
207 rv = sv_2mortal (newRV_noinc ((SV *)av));
208 }
209
210 PUSHs (rv);
136 } 211 }
212 break;
137 213
138 ENTER; 214 case EIO_OPEN:
139 PUSHMARK (SP);
140 XPUSHs (sv_2mortal (newSViv (req->result)));
141
142 if (req->type == REQ_OPEN)
143 { 215 {
144 /* convert fd to fh */ 216 /* convert fd to fh */
145 SV *fh; 217 SV *fh = &PL_sv_undef;
146 218
147 PUTBACK; 219 if (req->result >= 0)
148 call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL); 220 {
149 SPAGAIN; 221 GV *gv = (GV *)sv_newmortal ();
222 int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
223 char sym [64];
224 int symlen;
225
226 symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
227 gv_init (gv, stash, sym, symlen, 0);
150 228
151 fh = SvREFCNT_inc (POPs); 229 symlen = snprintf (
230 sym,
231 sizeof (sym),
232 "%s&=%d",
233 flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
234 req->result
235 );
152 236
237 if (do_open (gv, sym, symlen, 0, 0, 0, 0))
238 fh = (SV *)gv;
239 }
240
153 PUSHMARK (SP); 241 PUSHs (fh);
154 XPUSHs (sv_2mortal (fh));
155 } 242 }
243 break;
156 244
157 if (SvOK (req->callback)) 245 case EIO_GROUP:
246 req->int1 = 2; /* mark group as finished */
247
248 if (req->sv1)
158 { 249 {
159 PUTBACK; 250 int i;
160 call_sv (req->callback, G_VOID | G_EVAL); 251 AV *av = (AV *)req->sv1;
161 SPAGAIN; 252
253 EXTEND (SP, AvFILL (av) + 1);
254 for (i = 0; i <= AvFILL (av); ++i)
255 PUSHs (*av_fetch (av, i, 0));
162 } 256 }
257 break;
163 258
164 do_croak = SvTRUE (ERRSV); 259 case EIO_NOP:
260 case EIO_BUSY:
261 break;
165 262
166 LEAVE; 263 case EIO_READLINK:
264 if (req->result > 0)
167 265 {
168 if (req->callback) 266 SvCUR_set (req->sv2, req->result);
169 SvREFCNT_dec (req->callback); 267 *SvEND (req->sv2) = 0;
268 PUSHs (req->sv2);
269 }
270 break;
170 271
171 errno = errorno; 272 case EIO_STAT:
172 count++; 273 case EIO_LSTAT:
274 case EIO_FSTAT:
275 PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
276 PL_laststatval = req->result;
277 PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
278 PUSHs (sv_2mortal (newSViv (req->result)));
279 break;
280
281 case EIO_READ:
282 SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
283 *SvEND (req->sv2) = 0;
284 PUSHs (sv_2mortal (newSViv (req->result)));
285 break;
286
287 case EIO_DUP2:
288 if (req->result > 0)
289 req->result = 0;
290 /* FALLTHROUGH */
291
292 default:
293 PUSHs (sv_2mortal (newSViv (req->result)));
294 break;
173 } 295 }
174 296
175 prv = req; 297 errno = req->errorno;
176 req = req->next; 298
299 PUTBACK;
300 call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
301 SPAGAIN;
302
303 FREETMPS;
304 LEAVE;
305
306 PUTBACK;
307 }
308
309 return !!SvTRUE (ERRSV);
310}
311
312static void req_destroy (aio_req req)
313{
314 if (req->self)
315 {
316 sv_unmagic (req->self, PERL_MAGIC_ext);
317 SvREFCNT_dec (req->self);
318 }
319
320 SvREFCNT_dec (req->sv1);
321 SvREFCNT_dec (req->sv2);
322 SvREFCNT_dec (req->callback);
323
177 Safefree (prv); 324 Safefree (req);
325}
178 326
179 if (do_croak) 327static void req_cancel_subs (aio_req grp)
328{
329 aio_req sub;
330
331 if (grp->type != EIO_GROUP)
332 return;
333
334 SvREFCNT_dec (grp->sv2);
335 grp->sv2 = 0;
336
337 eio_grp_cancel (grp);
338}
339
340#ifdef USE_SOCKETS_AS_HANDLES
341# define TO_SOCKET(x) (win32_get_osfhandle (x))
342#else
343# define TO_SOCKET(x) (x)
344#endif
345
346static void
347create_respipe (void)
348{
349 int old_readfd = respipe [0];
350
351 if (respipe [1] >= 0)
352 respipe_close (TO_SOCKET (respipe [1]));
353
354#ifdef _WIN32
355 if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
356#else
357 if (pipe (respipe))
358#endif
359 croak ("unable to initialize result pipe");
360
361 if (old_readfd >= 0)
362 {
363 if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
364 croak ("unable to initialize result pipe(2)");
365
366 respipe_close (respipe [0]);
367 respipe [0] = old_readfd;
368 }
369
370#ifdef _WIN32
371 int arg = 1;
372 if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
373 || ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
374#else
375 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
376 || fcntl (respipe [1], F_SETFL, O_NONBLOCK))
377#endif
378 croak ("unable to initialize result pipe(3)");
379
380 respipe_osf [0] = TO_SOCKET (respipe [0]);
381 respipe_osf [1] = TO_SOCKET (respipe [1]);
382}
383
384static void poll_wait (void)
385{
386 fd_set rfd;
387
388 while (eio_nreqs ())
389 {
390 int size;
391
392 X_LOCK (reslock);
393 size = res_queue.size;
394 X_UNLOCK (reslock);
395
396 if (size)
397 return;
398
399 maybe_start_thread ();
400
401 FD_ZERO (&rfd);
402 FD_SET (respipe [0], &rfd);
403
404 PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
405 }
406}
407
408static int poll_cb (void)
409{
410 int res;
411
412 do
413 {
414 res = eio_poll ();
415
416 if (res > 0)
180 croak (0); 417 croak (0);
181 } 418 }
419 while (max_outstanding && max_outstanding <= eio_nreqs ());
182 420
183 return count; 421 return res;
184}
185
186static void *aio_proc(void *arg);
187
188static void
189start_thread (void)
190{
191 sigset_t fullsigset, oldsigset;
192 pthread_t tid;
193 pthread_attr_t attr;
194
195 pthread_attr_init (&attr);
196 pthread_attr_setstacksize (&attr, STACKSIZE);
197 pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
198
199 sigfillset (&fullsigset);
200 sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
201
202 if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
203 started++;
204
205 sigprocmask (SIG_SETMASK, &oldsigset, 0);
206}
207
208static void
209send_req (aio_req req)
210{
211 nreqs++;
212
213 pthread_mutex_lock (&reqlock);
214
215 req->next = 0;
216
217 if (reqe)
218 {
219 reqe->next = req;
220 reqe = req;
221 }
222 else
223 reqe = reqs = req;
224
225 pthread_cond_signal (&reqwait);
226 pthread_mutex_unlock (&reqlock);
227
228 while (nreqs > max_outstanding)
229 {
230 poll_wait ();
231 poll_cb ();
232 }
233}
234
235static void
236end_thread (void)
237{
238 aio_req req;
239 New (0, req, 1, aio_cb);
240 req->type = REQ_QUIT;
241
242 send_req (req);
243}
244
245
246static void min_parallel (int nthreads)
247{
248 while (nthreads > started)
249 start_thread ();
250}
251
252static void max_parallel (int nthreads)
253{
254 int cur = started;
255 while (cur > nthreads)
256 {
257 end_thread ();
258 cur--;
259 }
260
261 while (started > nthreads)
262 {
263 poll_wait ();
264 poll_cb ();
265 }
266}
267
268static int fork_started;
269
270static void atfork_prepare (void)
271{
272 pthread_mutex_lock (&frklock);
273
274 fork_started = started;
275
276 for (;;) {
277 while (nreqs)
278 {
279 poll_wait ();
280 poll_cb ();
281 }
282
283 max_parallel (0);
284
285 pthread_mutex_lock (&reqlock);
286
287 if (!nreqs && !started)
288 break;
289
290 pthread_mutex_unlock (&reqlock);
291
292 min_parallel (fork_started);
293 }
294
295 pthread_mutex_lock (&reslock);
296
297 assert (!started);
298 assert (!nreqs);
299 assert (!reqs && !reqe);
300 assert (!ress && !rese);
301}
302
303static void atfork_parent (void)
304{
305 pthread_mutex_unlock (&reslock);
306 min_parallel (fork_started);
307 pthread_mutex_unlock (&reqlock);
308 pthread_mutex_unlock (&frklock);
309} 422}
310 423
311static void atfork_child (void) 424static void atfork_child (void)
312{ 425{
313 reqs = reqe = 0; 426 create_respipe ();
314
315 atfork_parent ();
316}
317
318/*****************************************************************************/
319/* work around various missing functions */
320
321#if !HAVE_PREADWRITE
322# define pread aio_pread
323# define pwrite aio_pwrite
324
325/*
326 * make our pread/pwrite safe against themselves, but not against
327 * normal read/write by using a mutex. slows down execution a lot,
328 * but that's your problem, not mine.
329 */
330static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
331
332static ssize_t
333pread (int fd, void *buf, size_t count, off_t offset)
334{
335 ssize_t res;
336 off_t ooffset;
337
338 pthread_mutex_lock (&iolock);
339 ooffset = lseek (fd, 0, SEEK_CUR);
340 lseek (fd, offset, SEEK_SET);
341 res = read (fd, buf, count);
342 lseek (fd, ooffset, SEEK_SET);
343 pthread_mutex_unlock (&iolock);
344
345 return res;
346}
347
348static ssize_t
349pwrite (int fd, void *buf, size_t count, off_t offset)
350{
351 ssize_t res;
352 off_t ooffset;
353
354 pthread_mutex_lock (&iolock);
355 ooffset = lseek (fd, 0, SEEK_CUR);
356 lseek (fd, offset, SEEK_SET);
357 res = write (fd, buf, count);
358 lseek (fd, offset, SEEK_SET);
359 pthread_mutex_unlock (&iolock);
360
361 return res;
362}
363#endif
364
365#if !HAVE_FDATASYNC
366# define fdatasync fsync
367#endif
368
369#if !HAVE_READAHEAD
370# define readahead aio_readahead
371
372static char readahead_buf[4096];
373
374static ssize_t
375readahead (int fd, off_t offset, size_t count)
376{
377 while (count > 0)
378 {
379 size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
380
381 pread (fd, readahead_buf, len, offset);
382 offset += len;
383 count -= len;
384 }
385
386 errno = 0;
387}
388#endif
389
390/*****************************************************************************/
391
392static void *
393aio_proc (void *thr_arg)
394{
395 aio_req req;
396 int type;
397
398 do
399 {
400 pthread_mutex_lock (&reqlock);
401
402 for (;;)
403 {
404 req = reqs;
405
406 if (reqs)
407 {
408 reqs = reqs->next;
409 if (!reqs) reqe = 0;
410 }
411
412 if (req)
413 break;
414
415 pthread_cond_wait (&reqwait, &reqlock);
416 }
417
418 pthread_mutex_unlock (&reqlock);
419
420 errno = 0; /* strictly unnecessary */
421
422 type = req->type;
423
424 switch (type)
425 {
426 case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
427 case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
428
429 case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
430
431 case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
432 case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
433 case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
434
435 case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
436 case REQ_CLOSE: req->result = close (req->fd); break;
437 case REQ_UNLINK: req->result = unlink (req->dataptr); break;
438 case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
439 case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
440
441 case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
442 case REQ_FSYNC: req->result = fsync (req->fd); break;
443
444 case REQ_QUIT:
445 break;
446
447 default:
448 req->result = ENOSYS;
449 break;
450 }
451
452 req->errorno = errno;
453
454 pthread_mutex_lock (&reslock);
455
456 req->next = 0;
457
458 if (rese)
459 {
460 rese->next = req;
461 rese = req;
462 }
463 else
464 {
465 rese = ress = req;
466
467 /* write a dummy byte to the pipe so fh becomes ready */
468 write (respipe [1], &respipe, 1);
469 }
470
471 pthread_mutex_unlock (&reslock);
472 }
473 while (type != REQ_QUIT);
474
475 return 0;
476} 427}
477 428
478#define dREQ \ 429#define dREQ \
479 aio_req req; \ 430 aio_req req; \
431 int req_pri = next_pri; \
432 next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
480 \ 433 \
481 if (SvOK (callback) && !SvROK (callback)) \ 434 if (SvOK (callback) && !SvROK (callback)) \
482 croak ("clalback must be undef or of reference type"); \ 435 croak ("callback must be undef or of reference type"); \
483 \ 436 \
484 Newz (0, req, 1, aio_cb); \ 437 Newz (0, req, 1, eio_req); \
485 if (!req) \ 438 if (!req) \
486 croak ("out of memory during aio_req allocation"); \ 439 croak ("out of memory during eio_req allocation"); \
487 \ 440 \
488 req->callback = SvREFCNT_inc (callback); 441 req->callback = newSVsv (callback); \
442 req->pri = req_pri
443
444#define REQ_SEND \
445 eio_submit (req); \
446 \
447 if (GIMME_V != G_VOID) \
448 XPUSHs (req_sv (req, AIO_REQ_KLASS));
489 449
490MODULE = IO::AIO PACKAGE = IO::AIO 450MODULE = IO::AIO PACKAGE = IO::AIO
491 451
492PROTOTYPES: ENABLE 452PROTOTYPES: ENABLE
493 453
494BOOT: 454BOOT:
495{ 455{
496 if (pipe (respipe)) 456 stash = gv_stashpv ("IO::AIO", 1);
497 croak ("unable to initialize result pipe");
498 457
499 if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)) 458 newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
500 croak ("cannot set result pipe to nonblocking mode"); 459 newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
460 newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
461 newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
462 newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
463#ifdef _WIN32
464 X_MUTEX_CHECK (wrklock);
465 X_MUTEX_CHECK (reslock);
466 X_MUTEX_CHECK (reqlock);
467 X_MUTEX_CHECK (reqwait);
468 X_MUTEX_CHECK (preadwritelock);
469 X_MUTEX_CHECK (readdirlock);
501 470
502 if (fcntl (respipe [1], F_SETFL, O_NONBLOCK)) 471 X_COND_CHECK (reqwait);
503 croak ("cannot set result pipe to nonblocking mode"); 472#else
473 newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
474#endif
504 475
505 pthread_atfork (atfork_prepare, atfork_parent, atfork_child); 476 create_respipe ();
506}
507 477
478 if (eio_init (want_poll, done_poll) < 0)
479 croak ("IO::AIO: unable to initialise eio library");
480
481 /* atfork child called in fifo order, so before eio's handler */
482 X_THREAD_ATFORK (0, 0, atfork_child);
483}
484
508void 485void
509min_parallel(nthreads) 486max_poll_reqs (int nreqs)
510 int nthreads
511 PROTOTYPE: $ 487 PROTOTYPE: $
488 CODE:
489 eio_set_max_poll_reqs (nreqs);
512 490
513void 491void
514max_parallel(nthreads) 492max_poll_time (double nseconds)
515 int nthreads
516 PROTOTYPE: $ 493 PROTOTYPE: $
517
518int
519max_outstanding(nreqs)
520 int nreqs
521 PROTOTYPE: $
522 CODE: 494 CODE:
523 RETVAL = max_outstanding; 495 eio_set_max_poll_time (nseconds);
496
497void
498min_parallel (int nthreads)
499 PROTOTYPE: $
500 CODE:
501 eio_set_min_parallel (nthreads);
502
503void
504max_parallel (int nthreads)
505 PROTOTYPE: $
506 CODE:
507 eio_set_max_parallel (nthreads);
508
509void
510max_idle (int nthreads)
511 PROTOTYPE: $
512 CODE:
513 eio_set_max_idle (nthreads);
514
515void
516max_outstanding (int maxreqs)
517 PROTOTYPE: $
518 CODE:
524 max_outstanding = nreqs; 519 max_outstanding = maxreqs;
525 520
526void 521void
527aio_open(pathname,flags,mode,callback=&PL_sv_undef) 522aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
528 SV * pathname
529 int flags
530 int mode
531 SV * callback
532 PROTOTYPE: $$$;$ 523 PROTOTYPE: $$$;$
533 CODE: 524 PPCODE:
534{ 525{
535 dREQ; 526 dREQ;
536 527
537 req->type = REQ_OPEN; 528 req->type = EIO_OPEN;
538 req->data = newSVsv (pathname); 529 req->sv1 = newSVsv (pathname);
539 req->dataptr = SvPVbyte_nolen (req->data); 530 req->ptr1 = SvPVbyte_nolen (req->sv1);
540 req->fd = flags; 531 req->int1 = flags;
541 req->mode = mode; 532 req->int2 = mode;
542 533
543 send_req (req); 534 REQ_SEND;
544} 535}
545 536
546void 537void
547aio_close(fh,callback=&PL_sv_undef) 538aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
548 SV * fh
549 SV * callback
550 PROTOTYPE: $;$ 539 PROTOTYPE: $;$
551 ALIAS: 540 ALIAS:
552 aio_close = REQ_CLOSE
553 aio_fsync = REQ_FSYNC 541 aio_fsync = EIO_FSYNC
554 aio_fdatasync = REQ_FDATASYNC 542 aio_fdatasync = EIO_FDATASYNC
555 CODE: 543 PPCODE:
556{ 544{
557 dREQ; 545 dREQ;
558 546
559 req->type = ix; 547 req->type = ix;
560 req->fh = newSVsv (fh); 548 req->sv1 = newSVsv (fh);
561 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 549 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
562 550
563 send_req (req); 551 REQ_SEND (req);
564} 552}
565 553
566void 554void
555aio_close (SV *fh, SV *callback=&PL_sv_undef)
556 PROTOTYPE: $;$
557 PPCODE:
558{
559 static int close_pipe = -1; /* dummy fd to close fds via dup2 */
560 dREQ;
561
562 if (close_pipe < 0)
563 {
564 int pipefd [2];
565
566 if (pipe (pipefd) < 0
567 || close (pipefd [1]) < 0
568 || fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
569 abort (); /*D*/
570
571 close_pipe = pipefd [0];
572 }
573
574 req->type = EIO_DUP2;
575 req->int1 = close_pipe;
576 req->sv2 = newSVsv (fh);
577 req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
578
579 REQ_SEND (req);
580}
581
582void
567aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef) 583aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
568 SV * fh
569 UV offset
570 IV length
571 SV * data
572 IV dataoffset
573 SV * callback
574 ALIAS: 584 ALIAS:
575 aio_read = REQ_READ 585 aio_read = EIO_READ
576 aio_write = REQ_WRITE 586 aio_write = EIO_WRITE
577 PROTOTYPE: $$$$$;$ 587 PROTOTYPE: $$$$$;$
578 CODE: 588 PPCODE:
579{ 589{
580 aio_req req;
581 STRLEN svlen; 590 STRLEN svlen;
582 char *svptr = SvPVbyte (data, svlen); 591 char *svptr = SvPVbyte (data, svlen);
592 UV len = SvUV (length);
583 593
584 SvUPGRADE (data, SVt_PV); 594 SvUPGRADE (data, SVt_PV);
585 SvPOK_on (data); 595 SvPOK_on (data);
586 596
587 if (dataoffset < 0) 597 if (dataoffset < 0)
588 dataoffset += svlen; 598 dataoffset += svlen;
589 599
590 if (dataoffset < 0 || dataoffset > svlen) 600 if (dataoffset < 0 || dataoffset > svlen)
591 croak ("data offset outside of string"); 601 croak ("dataoffset outside of data scalar");
592 602
593 if (ix == REQ_WRITE) 603 if (ix == EIO_WRITE)
594 { 604 {
595 /* write: check length and adjust. */ 605 /* write: check length and adjust. */
596 if (length < 0 || length + dataoffset > svlen) 606 if (!SvOK (length) || len + dataoffset > svlen)
597 length = svlen - dataoffset; 607 len = svlen - dataoffset;
598 } 608 }
599 else 609 else
600 { 610 {
601 /* read: grow scalar as necessary */ 611 /* read: grow scalar as necessary */
602 svptr = SvGROW (data, length + dataoffset); 612 svptr = SvGROW (data, len + dataoffset + 1);
603 } 613 }
604 614
605 if (length < 0) 615 if (len < 0)
606 croak ("length must not be negative"); 616 croak ("length must not be negative");
607 617
608 { 618 {
609 dREQ; 619 dREQ;
610 620
611 req->type = ix; 621 req->type = ix;
612 req->fh = newSVsv (fh); 622 req->sv1 = newSVsv (fh);
613 req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh)) 623 req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
614 : IoOFP (sv_2io (fh))); 624 : IoOFP (sv_2io (fh)));
625 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
615 req->offset = offset; 626 req->size = len;
616 req->length = length;
617 req->data = SvREFCNT_inc (data); 627 req->sv2 = SvREFCNT_inc (data);
618 req->dataptr = (char *)svptr + dataoffset; 628 req->ptr2 = (char *)svptr + dataoffset;
619 req->callback = SvREFCNT_inc (callback); 629 req->stroffset = dataoffset;
620 630
621 send_req (req); 631 if (!SvREADONLY (data))
632 {
633 SvREADONLY_on (data);
634 req->flags |= FLAG_SV2_RO_OFF;
635 }
636
637 REQ_SEND;
622 } 638 }
623} 639}
624 640
625void 641void
642aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
643 PROTOTYPE: $$;$
644 PPCODE:
645{
646 SV *data;
647 dREQ;
648
649 data = newSV (NAME_MAX);
650 SvPOK_on (data);
651
652 req->type = EIO_READLINK;
653 req->sv1 = newSVsv (path);
654 req->ptr1 = SvPVbyte_nolen (req->sv1);
655 req->sv2 = data;
656 req->ptr2 = SvPVbyte_nolen (data);
657
658 REQ_SEND;
659}
660
661void
662aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
663 PROTOTYPE: $$$$;$
664 PPCODE:
665{
666 dREQ;
667
668 req->type = EIO_SENDFILE;
669 req->sv1 = newSVsv (out_fh);
670 req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
671 req->sv2 = newSVsv (in_fh);
672 req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
673 req->offs = SvVAL64 (in_offset);
674 req->size = length;
675
676 REQ_SEND;
677}
678
679void
626aio_readahead(fh,offset,length,callback=&PL_sv_undef) 680aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
627 SV * fh
628 UV offset
629 IV length
630 SV * callback
631 PROTOTYPE: $$$;$ 681 PROTOTYPE: $$$;$
632 CODE: 682 PPCODE:
633{ 683{
634 dREQ; 684 dREQ;
635 685
636 req->type = REQ_READAHEAD; 686 req->type = EIO_READAHEAD;
637 req->fh = newSVsv (fh); 687 req->sv1 = newSVsv (fh);
638 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh))); 688 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
639 req->offset = offset; 689 req->offs = SvVAL64 (offset);
640 req->length = length; 690 req->size = length;
641 691
642 send_req (req); 692 REQ_SEND;
643} 693}
644 694
645void 695void
646aio_stat(fh_or_path,callback=&PL_sv_undef) 696aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
647 SV * fh_or_path
648 SV * callback
649 ALIAS: 697 ALIAS:
650 aio_stat = REQ_STAT 698 aio_stat = EIO_STAT
651 aio_lstat = REQ_LSTAT 699 aio_lstat = EIO_LSTAT
652 CODE: 700 PPCODE:
653{ 701{
654 dREQ; 702 dREQ;
655 703
656 New (0, req->statdata, 1, Stat_t); 704 req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
657 if (!req->statdata) 705 if (!req->ptr2)
658 croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)"); 706 {
707 req_destroy (req);
708 croak ("out of memory during aio_stat statdata allocation");
709 }
710
711 req->flags |= EIO_FLAG_PTR2_FREE;
712 req->sv1 = newSVsv (fh_or_path);
659 713
660 if (SvPOK (fh_or_path)) 714 if (SvPOK (fh_or_path))
661 { 715 {
662 req->type = ix; 716 req->type = ix;
663 req->data = newSVsv (fh_or_path);
664 req->dataptr = SvPVbyte_nolen (req->data); 717 req->ptr1 = SvPVbyte_nolen (req->sv1);
665 } 718 }
666 else 719 else
667 { 720 {
668 req->type = REQ_FSTAT; 721 req->type = EIO_FSTAT;
669 req->fh = newSVsv (fh_or_path);
670 req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path))); 722 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
723 }
724
725 REQ_SEND;
726}
727
728void
729aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
730 PPCODE:
731{
732 dREQ;
733
734 req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
735 req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
736 req->sv1 = newSVsv (fh_or_path);
737
738 if (SvPOK (fh_or_path))
671 } 739 {
740 req->type = EIO_UTIME;
741 req->ptr1 = SvPVbyte_nolen (req->sv1);
742 }
743 else
744 {
745 req->type = EIO_FUTIME;
746 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
747 }
672 748
673 send_req (req); 749 REQ_SEND;
674} 750}
675 751
676void 752void
753aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
754 PPCODE:
755{
756 dREQ;
757
758 req->sv1 = newSVsv (fh_or_path);
759 req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
760
761 if (SvPOK (fh_or_path))
762 {
763 req->type = EIO_TRUNCATE;
764 req->ptr1 = SvPVbyte_nolen (req->sv1);
765 }
766 else
767 {
768 req->type = EIO_FTRUNCATE;
769 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
770 }
771
772 REQ_SEND;
773}
774
775void
776aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
777 ALIAS:
778 aio_chmod = EIO_CHMOD
779 aio_fchmod = EIO_FCHMOD
780 aio_mkdir = EIO_MKDIR
781 PPCODE:
782{
783 dREQ;
784
785 req->type = ix;
786 req->int2 = mode;
787 req->sv1 = newSVsv (fh_or_path);
788
789 if (ix == EIO_FCHMOD)
790 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
791 else
792 req->ptr1 = SvPVbyte_nolen (req->sv1);
793
794 REQ_SEND;
795}
796
797void
798aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
799 PPCODE:
800{
801 dREQ;
802
803 req->int2 = SvOK (uid) ? SvIV (uid) : -1;
804 req->int3 = SvOK (gid) ? SvIV (gid) : -1;
805 req->sv1 = newSVsv (fh_or_path);
806
807 if (SvPOK (fh_or_path))
808 {
809 req->type = EIO_CHOWN;
810 req->ptr1 = SvPVbyte_nolen (req->sv1);
811 }
812 else
813 {
814 req->type = EIO_FCHOWN;
815 req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
816 }
817
818 REQ_SEND;
819}
820
821void
677aio_unlink(pathname,callback=&PL_sv_undef) 822aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
678 SV * pathname
679 SV * callback
680 ALIAS: 823 ALIAS:
681 aio_unlink = REQ_UNLINK 824 aio_unlink = EIO_UNLINK
682 aio_rmdir = REQ_RMDIR 825 aio_rmdir = EIO_RMDIR
826 aio_readdir = EIO_READDIR
683 CODE: 827 PPCODE:
684{ 828{
685 dREQ; 829 dREQ;
686 830
687 req->type = ix; 831 req->type = ix;
688 req->data = newSVsv (pathname); 832 req->sv1 = newSVsv (pathname);
689 req->dataptr = SvPVbyte_nolen (req->data); 833 req->ptr1 = SvPVbyte_nolen (req->sv1);
834
835 REQ_SEND;
836}
837
838void
839aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
840 ALIAS:
841 aio_link = EIO_LINK
842 aio_symlink = EIO_SYMLINK
843 aio_rename = EIO_RENAME
844 PPCODE:
845{
846 dREQ;
690 847
691 send_req (req); 848 req->type = ix;
692} 849 req->sv1 = newSVsv (oldpath);
693 850 req->ptr1 = SvPVbyte_nolen (req->sv1);
694void 851 req->sv2 = newSVsv (newpath);
695aio_symlink(oldpath,newpath,callback=&PL_sv_undef) 852 req->ptr2 = SvPVbyte_nolen (req->sv2);
696 SV * oldpath
697 SV * newpath
698 SV * callback
699 CODE:
700{
701 dREQ;
702 853
703 req->type = REQ_SYMLINK; 854 REQ_SEND;
704 req->fh = newSVsv (oldpath); 855}
705 req->data2ptr = SvPVbyte_nolen (req->fh); 856
706 req->data = newSVsv (newpath); 857void
707 req->dataptr = SvPVbyte_nolen (req->data); 858aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
859 PPCODE:
860{
861 dREQ;
708 862
709 send_req (req); 863 req->type = EIO_MKNOD;
864 req->sv1 = newSVsv (pathname);
865 req->ptr1 = SvPVbyte_nolen (req->sv1);
866 req->int2 = (mode_t)mode;
867 req->offs = dev;
868
869 REQ_SEND;
710} 870}
711 871
712void 872void
873aio_busy (double delay, SV *callback=&PL_sv_undef)
874 PPCODE:
875{
876 dREQ;
877
878 req->type = EIO_BUSY;
879 req->nv1 = delay < 0. ? 0. : delay;
880
881 REQ_SEND;
882}
883
884void
885aio_group (SV *callback=&PL_sv_undef)
886 PROTOTYPE: ;$
887 PPCODE:
888{
889 dREQ;
890
891 req->type = EIO_GROUP;
892
893 eio_submit (req);
894 XPUSHs (req_sv (req, AIO_GRP_KLASS));
895}
896
897void
898aio_nop (SV *callback=&PL_sv_undef)
899 ALIAS:
900 aio_nop = EIO_NOP
901 aio_sync = EIO_SYNC
902 PPCODE:
903{
904 dREQ;
905
906 req->type = ix;
907
908 REQ_SEND;
909}
910
911int
912aioreq_pri (int pri = 0)
913 PROTOTYPE: ;$
914 CODE:
915 RETVAL = next_pri - EIO_PRI_BIAS;
916 if (items > 0)
917 {
918 if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
919 if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
920 next_pri = pri + EIO_PRI_BIAS;
921 }
922 OUTPUT:
923 RETVAL
924
925void
926aioreq_nice (int nice = 0)
927 CODE:
928 nice = next_pri - nice;
929 if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
930 if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
931 next_pri = nice + EIO_PRI_BIAS;
932
933void
713flush() 934flush ()
714 PROTOTYPE: 935 PROTOTYPE:
715 CODE: 936 CODE:
716 while (nreqs) 937 while (eio_nreqs ())
717 { 938 {
718 poll_wait (); 939 poll_wait ();
719 poll_cb (); 940 poll_cb ();
720 } 941 }
721 942
722void 943int
723poll() 944poll()
724 PROTOTYPE: 945 PROTOTYPE:
725 CODE: 946 CODE:
726 if (nreqs)
727 {
728 poll_wait (); 947 poll_wait ();
729 poll_cb (); 948 RETVAL = poll_cb ();
730 } 949 OUTPUT:
950 RETVAL
731 951
732int 952int
733poll_fileno() 953poll_fileno()
734 PROTOTYPE: 954 PROTOTYPE:
735 CODE: 955 CODE:
… …
747 967
748void 968void
749poll_wait() 969poll_wait()
750 PROTOTYPE: 970 PROTOTYPE:
751 CODE: 971 CODE:
752 if (nreqs)
753 poll_wait (); 972 poll_wait ();
754 973
755int 974int
756nreqs() 975nreqs()
757 PROTOTYPE: 976 PROTOTYPE:
758 CODE: 977 CODE:
759 RETVAL = nreqs; 978 RETVAL = eio_nreqs ();
760 OUTPUT: 979 OUTPUT:
761 RETVAL 980 RETVAL
762 981
982int
983nready()
984 PROTOTYPE:
985 CODE:
986 RETVAL = eio_nready ();
987 OUTPUT:
988 RETVAL
989
990int
991npending()
992 PROTOTYPE:
993 CODE:
994 RETVAL = eio_npending ();
995 OUTPUT:
996 RETVAL
997
998int
999nthreads()
1000 PROTOTYPE:
1001 CODE:
1002 if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
1003 RETVAL = started;
1004 if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
1005 OUTPUT:
1006 RETVAL
1007
1008PROTOTYPES: DISABLE
1009
1010MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1011
1012void
1013cancel (aio_req_ornot req)
1014 CODE:
1015 eio_cancel (req);
1016
1017void
1018cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1019 CODE:
1020 SvREFCNT_dec (req->callback);
1021 req->callback = newSVsv (callback);
1022
1023MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1024
1025void
1026add (aio_req grp, ...)
1027 PPCODE:
1028{
1029 int i;
1030
1031 if (grp->int1 == 2)
1032 croak ("cannot add requests to IO::AIO::GRP after the group finished");
1033
1034 for (i = 1; i < items; ++i )
1035 {
1036 aio_req req;
1037
1038 if (GIMME_V != G_VOID)
1039 XPUSHs (sv_2mortal (newSVsv (ST (i))));
1040
1041 req = SvAIO_REQ (ST (i));
1042
1043 if (req)
1044 eio_grp_add (grp, req);
1045 }
1046}
1047
1048void
1049cancel_subs (aio_req_ornot req)
1050 CODE:
1051 req_cancel_subs (req);
1052
1053void
1054result (aio_req grp, ...)
1055 CODE:
1056{
1057 int i;
1058 AV *av;
1059
1060 grp->errorno = errno;
1061
1062 av = newAV ();
1063
1064 for (i = 1; i < items; ++i )
1065 av_push (av, newSVsv (ST (i)));
1066
1067 SvREFCNT_dec (grp->sv1);
1068 grp->sv1 = (SV *)av;
1069}
1070
1071void
1072errno (aio_req grp, int errorno = errno)
1073 CODE:
1074 grp->errorno = errorno;
1075
1076void
1077limit (aio_req grp, int limit)
1078 CODE:
1079 eio_grp_limit (grp, limit);
1080
1081void
1082feed (aio_req grp, SV *callback=&PL_sv_undef)
1083 CODE:
1084{
1085 SvREFCNT_dec (grp->sv2);
1086 grp->sv2 = newSVsv (callback);
1087
1088 if (grp->int2 <= 0)
1089 grp->int2 = 2;
1090
1091 eio_grp_limit (grp, grp->int2);
1092}
1093

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