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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.7 by root, Mon Jul 11 01:49:14 2005 UTC vs.
Revision 1.117 by root, Sat May 10 20:02:09 2008 UTC

		1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
		9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
5	#include <sys/types.h>	12	#include <sys/types.h>
6	#include <sys/stat.h>	13	#include <sys/stat.h>
7	#include <unistd.h>	14	#include <limits.h>
8	#include <fcntl.h>	15	#include <fcntl.h>
9	#include <signal.h>
10	#include <sched.h>	16	#include <sched.h>
11	#include <endian.h>
12		17
13	#include <pthread.h>	18	#ifdef _WIN32
14	#include <sys/syscall.h>
15		19
16	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	20	# define EIO_STRUCT_DIRENT Direntry_t
17	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	# undef malloc
18	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	22	# undef free
19		23
20	#if __ia64	24	// perl overrides all those nice win32 functions
21	# 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
22	#else	56	#else
23	# 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
24	#endif	65	#endif
25		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
		76	static HV *stash;
		77	typedef 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
		90	static int req_invoke (eio_req *req);
		91	#define EIO_FINISH(req) req_invoke (req)
		92	static void aio_grp_feed (eio_req *grp);
		93	#define EIO_FEED(req) aio_grp_feed (req)
		94	static void req_destroy (eio_req *grp);
		95	#define EIO_DESTROY(req) req_destroy (req)
		96
26	enum {	97	enum {
27	REQ_QUIT,	98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
28	REQ_OPEN, REQ_CLOSE,
29	REQ_READ, REQ_WRITE, REQ_READAHEAD,
30	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
31	REQ_FSYNC, REQ_FDATASYNC,
32	};	99	};
33		100
34	typedef struct aio_cb {	101	#include "libeio/eio.c"
35	struct aio_cb *volatile next;
36		102
37	int type;
38
39	int fd;
40	off_t offset;
41	size_t length;
42	ssize_t result;
43	mode_t mode; /* open */
44	int errorno;
45	SV *data, *callback;
46	void *dataptr;
47	STRLEN dataoffset;
48
49	Stat_t *statdata;
50	} aio_cb;
51
52	typedef aio_cb *aio_req;	103	typedef eio_req *aio_req;
		104	typedef eio_req *aio_req_ornot;
53		105
54	static int started;	106	static SV *on_next_submit;
55	static int nreqs;	107	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
56	static int max_outstanding = 1<<30;	108	static int max_outstanding;
57	static int respipe [2];
58		109
59	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	110	static int respipe_osf [2], respipe [2] = { -1, -1 };
60	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
61	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62		111
63	static volatile aio_req reqs, reqe; /* queue start, queue end */	112	static void req_destroy (aio_req req);
64	static volatile aio_req ress, rese; /* queue start, queue end */	113	static void req_cancel (aio_req req);
65		114
66	static void	115	static void want_poll (void)
67	poll_wait ()
68	{	116	{
		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
		121	static 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 */
		130	static SV *req_sv (aio_req req, const char *klass)
		131	{
69	if (!nreqs)	132	if (!req->self)
70	return;	133	{
		134	req->self = (SV *)newHV ();
		135	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		136	}
71		137
72	fd_set rfd;	138	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
73	FD_ZERO(&rfd);
74	FD_SET(respipe [0], &rfd);
75
76	select (respipe [0] + 1, &rfd, 0, 0, 0);
77	}	139	}
78		140
79	static int	141	static aio_req SvAIO_REQ (SV *sv)
80	poll_cb ()	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
		153	static 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
		171	static void req_submit (eio_req *req)
		172	{
		173	eio_submit (req);
		174
		175	if (on_next_submit)
		176	{
		177	dSP;
		178	SV *cb = sv_2mortal (on_next_submit);
		179
		180	on_next_submit = 0;
		181
		182	PUSHMARK (SP);
		183	PUTBACK;
		184	call_sv (cb, G_DISCARD | G_EVAL);
		185	}
		186	}
		187
		188	static int req_invoke (eio_req *req)
81	{	189	{
82	dSP;	190	dSP;
83	int count = 0;
84	aio_req req;
85
86	{
87	/* read and signals sent by the worker threads */
88	char buf [32];
89	while (read (respipe [0], buf, 32) > 0)
90	;
91	}
92		191
93	for (;;)	192	if (req->flags & FLAG_SV2_RO_OFF)
		193	SvREADONLY_off (req->sv2);
		194
		195	if (!EIO_CANCELLED (req) && SvOK (req->callback))
94	{	196	{
95	pthread_mutex_lock (&reslock);	197	ENTER;
		198	SAVETMPS;
		199	PUSHMARK (SP);
		200	EXTEND (SP, 1);
96		201
97	req = ress;	202	switch (req->type)
98
99	if (ress)
100	{	203	{
101	ress = ress->next;	204	case EIO_READDIR:
102	if (!ress) rese = 0;
103	}
104
105	pthread_mutex_unlock (&reslock);
106
107	if (!req)
108	break;
109
110	nreqs--;
111
112	if (req->type == REQ_QUIT)
113	started--;
114	else
115	{
116	int errorno = errno;
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->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127	{	205	{
128	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	206	SV *rv = &PL_sv_undef;
129	PL_laststatval = req->result;
130	PL_statcache = *(req->statdata);
131		207
132	Safefree (req->statdata);	208	if (req->result >= 0)
		209	{
		210	int i;
		211	char *buf = req->ptr2;
		212	AV *av = newAV ();
		213
		214	av_extend (av, req->result - 1);
		215
		216	for (i = 0; i < req->result; ++i)
		217	{
		218	SV *sv = newSVpv (buf, 0);
		219
		220	av_store (av, i, sv);
		221	buf += SvCUR (sv) + 1;
		222	}
		223
		224	rv = sv_2mortal (newRV_noinc ((SV *)av));
		225	}
		226
		227	PUSHs (rv);
133	}	228	}
		229	break;
134		230
135	PUSHMARK (SP);	231	case EIO_OPEN:
136	XPUSHs (sv_2mortal (newSViv (req->result)));
137
138	if (req->type == REQ_OPEN)
139	{	232	{
140	/* convert fd to fh */	233	/* convert fd to fh */
141	SV *fh;	234	SV *fh = &PL_sv_undef;
142		235
143	PUTBACK;	236	if (req->result >= 0)
144	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	237	{
145	SPAGAIN;	238	GV *gv = (GV *)sv_newmortal ();
		239	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		240	char sym [64];
		241	int symlen;
		242
		243	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		244	gv_init (gv, stash, sym, symlen, 0);
146		245
147	fh = POPs;	246	symlen = snprintf (
		247	sym,
		248	sizeof (sym),
		249	"%s&=%d",
		250	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		251	req->result
		252	);
148		253
149	PUSHMARK (SP);	254	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		255	fh = (SV *)gv;
		256	}
		257
150	XPUSHs (fh);	258	PUSHs (fh);
151	}	259	}
152
153	PUTBACK;
154	call_sv (req->callback, G_VOID | G_EVAL);
155	SPAGAIN;
156
157	if (req->callback)
158	SvREFCNT_dec (req->callback);
159
160	errno = errorno;
161	count++;
162	}
163
164	Safefree (req);
165	}
166
167	return count;
168	}
169
170	static void *aio_proc(void *arg);
171
172	static void
173	start_thread (void)
174	{
175	sigset_t fullsigset, oldsigset;
176	pthread_t tid;
177	pthread_attr_t attr;
178
179	pthread_attr_init (&attr);
180	pthread_attr_setstacksize (&attr, STACKSIZE);
181	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
182
183	sigfillset (&fullsigset);
184	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
185
186	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
187	started++;
188
189	sigprocmask (SIG_SETMASK, &oldsigset, 0);
190	}
191
192	static void
193	send_req (aio_req req)
194	{
195	nreqs++;
196
197	pthread_mutex_lock (&reqlock);
198
199	req->next = 0;
200
201	if (reqe)
202	{
203	reqe->next = req;
204	reqe = req;
205	}
206	else
207	reqe = reqs = req;
208
209	pthread_cond_signal (&reqwait);
210	pthread_mutex_unlock (&reqlock);
211
212	while (nreqs > max_outstanding)
213	{
214	poll_wait ();
215	poll_cb ();
216	}
217	}
218
219	static void
220	end_thread (void)
221	{
222	aio_req req;
223	New (0, req, 1, aio_cb);
224	req->type = REQ_QUIT;
225
226	send_req (req);
227	}
228
229	static void
230	read_write (int dowrite, int fd, off_t offset, size_t length,
231	SV *data, STRLEN dataoffset, SV *callback)
232	{
233	aio_req req;
234	STRLEN svlen;
235	char *svptr = SvPV (data, svlen);
236
237	SvUPGRADE (data, SVt_PV);
238	SvPOK_on (data);
239
240	if (dataoffset < 0)
241	dataoffset += svlen;
242
243	if (dataoffset < 0 || dataoffset > svlen)
244	croak ("data offset outside of string");
245
246	if (dowrite)
247	{
248	/* write: check length and adjust. */
249	if (length < 0 || length + dataoffset > svlen)
250	length = svlen - dataoffset;
251	}
252	else
253	{
254	/* read: grow scalar as necessary */
255	svptr = SvGROW (data, length + dataoffset);
256	}
257
258	if (length < 0)
259	croak ("length must not be negative");
260
261	Newz (0, req, 1, aio_cb);
262
263	if (!req)
264	croak ("out of memory during aio_req allocation");
265
266	req->type = dowrite ? REQ_WRITE : REQ_READ;
267	req->fd = fd;
268	req->offset = offset;
269	req->length = length;
270	req->data = SvREFCNT_inc (data);
271	req->dataptr = (char *)svptr + dataoffset;
272	req->callback = SvREFCNT_inc (callback);
273
274	send_req (req);
275	}
276
277	static void *
278	aio_proc (void *thr_arg)
279	{
280	aio_req req;
281	int type;
282
283	do
284	{
285	pthread_mutex_lock (&reqlock);
286
287	for (;;)
288	{
289	req = reqs;
290
291	if (reqs)
292	{
293	reqs = reqs->next;
294	if (!reqs) reqe = 0;
295	}
296
297	if (req)
298	break;	260	break;
299		261
300	pthread_cond_wait (&reqwait, &reqlock);	262	case EIO_GROUP:
301	}	263	req->int1 = 2; /* mark group as finished */
302		264
303	pthread_mutex_unlock (&reqlock);	265	if (req->sv1)
304
305	errno = 0; /* strictly unnecessary */
306
307	type = req->type;
308
309	switch (type)
310	{	266	{
311	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	267	int i;
312	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;	268	AV *av = (AV *)req->sv1;
313	#if SYS_readahead
314	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
315	#else
316	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
317	#endif
318		269
319	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	270	EXTEND (SP, AvFILL (av) + 1);
320	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	271	for (i = 0; i <= AvFILL (av); ++i)
321	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	272	PUSHs (*av_fetch (av, i, 0));
322		273	}
323	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
324	case REQ_CLOSE: req->result = close (req->fd); break;
325	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
326
327	case REQ_FSYNC: req->result = fsync (req->fd); break;
328	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
329
330	case REQ_QUIT:
331	break;	274	break;
332		275
		276	case EIO_NOP:
		277	case EIO_BUSY:
		278	break;
		279
		280	case EIO_READLINK:
		281	if (req->result > 0)
		282	{
		283	SvCUR_set (req->sv2, req->result);
		284	*SvEND (req->sv2) = 0;
		285	PUSHs (req->sv2);
		286	}
		287	break;
		288
		289	case EIO_STAT:
		290	case EIO_LSTAT:
		291	case EIO_FSTAT:
		292	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		293	PL_laststatval = req->result;
		294	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		295	PUSHs (sv_2mortal (newSViv (req->result)));
		296	break;
		297
		298	case EIO_READ:
		299	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		300	*SvEND (req->sv2) = 0;
		301	PUSHs (sv_2mortal (newSViv (req->result)));
		302	break;
		303
		304	case EIO_DUP2:
		305	if (req->result > 0)
		306	req->result = 0;
		307	/* FALLTHROUGH */
		308
333	default:	309	default:
334	req->result = ENOSYS;	310	PUSHs (sv_2mortal (newSViv (req->result)));
335	break;	311	break;
336	}	312	}
337		313
338	req->errorno = errno;	314	errno = req->errorno;
339		315
340	pthread_mutex_lock (&reslock);	316	PUTBACK;
		317	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		318	SPAGAIN;
341		319
342	req->next = 0;	320	FREETMPS;
		321	LEAVE;
343		322
344	if (rese)	323	PUTBACK;
345	{
346	rese->next = req;
347	rese = req;
348	}
349	else
350	{
351	rese = ress = req;
352
353	/* write a dummy byte to the pipe so fh becomes ready */
354	write (respipe [1], &respipe, 1);
355	}
356
357	pthread_mutex_unlock (&reslock);
358	}	324	}
359	while (type != REQ_QUIT);
360		325
		326	return !!SvTRUE (ERRSV);
		327	}
		328
		329	static void req_destroy (aio_req req)
		330	{
		331	if (req->self)
		332	{
		333	sv_unmagic (req->self, PERL_MAGIC_ext);
		334	SvREFCNT_dec (req->self);
		335	}
		336
		337	SvREFCNT_dec (req->sv1);
		338	SvREFCNT_dec (req->sv2);
		339	SvREFCNT_dec (req->callback);
		340
		341	Safefree (req);
		342	}
		343
		344	static void req_cancel_subs (aio_req grp)
		345	{
		346	aio_req sub;
		347
		348	if (grp->type != EIO_GROUP)
		349	return;
		350
		351	SvREFCNT_dec (grp->sv2);
		352	grp->sv2 = 0;
		353
		354	eio_grp_cancel (grp);
		355	}
		356
		357	#ifdef USE_SOCKETS_AS_HANDLES
		358	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		359	#else
		360	# define TO_SOCKET(x) (x)
		361	#endif
		362
		363	static void
		364	create_respipe (void)
		365	{
		366	int old_readfd = respipe [0];
		367
		368	if (respipe [1] >= 0)
		369	respipe_close (TO_SOCKET (respipe [1]));
		370
		371	#ifdef _WIN32
		372	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		373	#else
		374	if (pipe (respipe))
		375	#endif
		376	croak ("unable to initialize result pipe");
		377
		378	if (old_readfd >= 0)
		379	{
		380	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		381	croak ("unable to initialize result pipe(2)");
		382
		383	respipe_close (respipe [0]);
		384	respipe [0] = old_readfd;
		385	}
		386
		387	#ifdef _WIN32
		388	int arg = 1;
		389	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		390	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		391	#else
		392	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		393	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		394	#endif
		395	croak ("unable to initialize result pipe(3)");
		396
		397	respipe_osf [0] = TO_SOCKET (respipe [0]);
		398	respipe_osf [1] = TO_SOCKET (respipe [1]);
		399	}
		400
		401	static void poll_wait (void)
		402	{
		403	fd_set rfd;
		404
		405	while (eio_nreqs ())
		406	{
		407	int size;
		408
		409	X_LOCK (reslock);
		410	size = res_queue.size;
		411	X_UNLOCK (reslock);
		412
		413	if (size)
		414	return;
		415
		416	maybe_start_thread ();
		417
		418	FD_ZERO (&rfd);
		419	FD_SET (respipe [0], &rfd);
		420
		421	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		422	}
		423	}
		424
		425	static int poll_cb (void)
		426	{
		427	int res;
		428
		429	do
		430	{
		431	res = eio_poll ();
		432
		433	if (res > 0)
		434	croak (0);
		435	}
		436	while (max_outstanding && max_outstanding <= eio_nreqs ());
		437
361	return 0;	438	return res;
362	}	439	}
363		440
		441	static void atfork_child (void)
		442	{
		443	create_respipe ();
		444	}
		445
		446	#define dREQ \
		447	aio_req req; \
		448	int req_pri = next_pri; \
		449	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
		450	\
		451	if (SvOK (callback) && !SvROK (callback)) \
		452	croak ("callback must be undef or of reference type"); \
		453	\
		454	Newz (0, req, 1, eio_req); \
		455	if (!req) \
		456	croak ("out of memory during eio_req allocation"); \
		457	\
		458	req->callback = newSVsv (callback); \
		459	req->pri = req_pri
		460
		461	#define REQ_SEND \
		462	req_submit (req); \
		463	\
		464	if (GIMME_V != G_VOID) \
		465	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		466
364	MODULE = IO::AIO PACKAGE = IO::AIO	467	MODULE = IO::AIO PACKAGE = IO::AIO
365		468
		469	PROTOTYPES: ENABLE
		470
366	BOOT:	471	BOOT:
367	{	472	{
368	if (pipe (respipe))	473	stash = gv_stashpv ("IO::AIO", 1);
369	croak ("unable to initialize result pipe");
370		474
371	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	475	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
372	croak ("cannot set result pipe to nonblocking mode");	476	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		477	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		478	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		479	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		480	#ifdef _WIN32
		481	X_MUTEX_CHECK (wrklock);
		482	X_MUTEX_CHECK (reslock);
		483	X_MUTEX_CHECK (reqlock);
		484	X_MUTEX_CHECK (reqwait);
		485	X_MUTEX_CHECK (preadwritelock);
		486	X_MUTEX_CHECK (readdirlock);
373		487
374	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	488	X_COND_CHECK (reqwait);
375	croak ("cannot set result pipe to nonblocking mode");	489	#else
376	}	490	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		491	#endif
377		492
		493	create_respipe ();
		494
		495	if (eio_init (want_poll, done_poll) < 0)
		496	croak ("IO::AIO: unable to initialise eio library");
		497
		498	/* atfork child called in fifo order, so before eio's handler */
		499	X_THREAD_ATFORK (0, 0, atfork_child);
		500	}
		501
378	void	502	void
379	min_parallel(nthreads)	503	max_poll_reqs (int nreqs)
380	int nthreads
381	PROTOTYPE: $	504	PROTOTYPE: $
382	CODE:	505	CODE:
383	while (nthreads > started)	506	eio_set_max_poll_reqs (nreqs);
384	start_thread ();
385		507
386	void	508	void
387	max_parallel(nthreads)	509	max_poll_time (double nseconds)
388	int nthreads
389	PROTOTYPE: $	510	PROTOTYPE: $
390	CODE:	511	CODE:
		512	eio_set_max_poll_time (nseconds);
		513
		514	void
		515	min_parallel (int nthreads)
		516	PROTOTYPE: $
		517	CODE:
		518	eio_set_min_parallel (nthreads);
		519
		520	void
		521	max_parallel (int nthreads)
		522	PROTOTYPE: $
		523	CODE:
		524	eio_set_max_parallel (nthreads);
		525
		526	void
		527	max_idle (int nthreads)
		528	PROTOTYPE: $
		529	CODE:
		530	eio_set_max_idle (nthreads);
		531
		532	void
		533	max_outstanding (int maxreqs)
		534	PROTOTYPE: $
		535	CODE:
		536	max_outstanding = maxreqs;
		537
		538	void
		539	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		540	PROTOTYPE: $$$;$
		541	PPCODE:
391	{	542	{
392	int cur = started;	543	dREQ;
393	while (cur > nthreads)	544
394	{	545	req->type = EIO_OPEN;
395	end_thread ();	546	req->sv1 = newSVsv (pathname);
		547	req->ptr1 = SvPVbyte_nolen (req->sv1);
		548	req->int1 = flags;
		549	req->int2 = mode;
		550
		551	REQ_SEND;
		552	}
		553
		554	void
		555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		556	PROTOTYPE: $;$
		557	ALIAS:
		558	aio_fsync = EIO_FSYNC
		559	aio_fdatasync = EIO_FDATASYNC
		560	PPCODE:
		561	{
		562	dREQ;
		563
		564	req->type = ix;
		565	req->sv1 = newSVsv (fh);
		566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		567
		568	REQ_SEND (req);
		569	}
		570
		571	void
		572	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		573	PROTOTYPE: $;$
		574	PPCODE:
		575	{
		576	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		577	dREQ;
		578
		579	if (close_pipe < 0)
		580	{
		581	int pipefd [2];
		582
		583	if (pipe (pipefd) < 0
		584	|| close (pipefd [1]) < 0
		585	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		586	abort (); /*D*/
		587
		588	close_pipe = pipefd [0];
		589	}
		590
		591	req->type = EIO_DUP2;
		592	req->int1 = close_pipe;
		593	req->sv2 = newSVsv (fh);
		594	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		595
		596	REQ_SEND (req);
		597	}
		598
		599	void
		600	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		601	ALIAS:
		602	aio_read = EIO_READ
		603	aio_write = EIO_WRITE
		604	PROTOTYPE: $$$$$;$
		605	PPCODE:
		606	{
		607	STRLEN svlen;
		608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
		610
		611	SvUPGRADE (data, SVt_PV);
		612	SvPOK_on (data);
		613
		614	if (dataoffset < 0)
		615	dataoffset += svlen;
		616
		617	if (dataoffset < 0 || dataoffset > svlen)
		618	croak ("dataoffset outside of data scalar");
		619
		620	if (ix == EIO_WRITE)
		621	{
		622	/* write: check length and adjust. */
		623	if (!SvOK (length) || len + dataoffset > svlen)
		624	len = svlen - dataoffset;
		625	}
		626	else
		627	{
		628	/* read: grow scalar as necessary */
		629	svptr = SvGROW (data, len + dataoffset + 1);
		630	}
		631
		632	if (len < 0)
		633	croak ("length must not be negative");
		634
		635	{
		636	dREQ;
		637
		638	req->type = ix;
		639	req->sv1 = newSVsv (fh);
		640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		641	: IoOFP (sv_2io (fh)));
		642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		643	req->size = len;
		644	req->sv2 = SvREFCNT_inc (data);
		645	req->ptr2 = (char *)svptr + dataoffset;
		646	req->stroffset = dataoffset;
		647
		648	if (!SvREADONLY (data))
396	cur--;	649	{
		650	SvREADONLY_on (data);
		651	req->flags |= FLAG_SV2_RO_OFF;
397	}	652	}
398		653
399	while (started > nthreads)	654	REQ_SEND;
		655	}
		656	}
		657
		658	void
		659	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		660	PROTOTYPE: $$;$
		661	PPCODE:
		662	{
		663	SV *data;
		664	dREQ;
		665
		666	data = newSV (NAME_MAX);
		667	SvPOK_on (data);
		668
		669	req->type = EIO_READLINK;
		670	req->sv1 = newSVsv (path);
		671	req->ptr1 = SvPVbyte_nolen (req->sv1);
		672	req->sv2 = data;
		673	req->ptr2 = SvPVbyte_nolen (data);
		674
		675	REQ_SEND;
		676	}
		677
		678	void
		679	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		680	PROTOTYPE: $$$$;$
		681	PPCODE:
		682	{
		683	dREQ;
		684
		685	req->type = EIO_SENDFILE;
		686	req->sv1 = newSVsv (out_fh);
		687	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		688	req->sv2 = newSVsv (in_fh);
		689	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		690	req->offs = SvVAL64 (in_offset);
		691	req->size = length;
		692
		693	REQ_SEND;
		694	}
		695
		696	void
		697	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		698	PROTOTYPE: $$$;$
		699	PPCODE:
		700	{
		701	dREQ;
		702
		703	req->type = EIO_READAHEAD;
		704	req->sv1 = newSVsv (fh);
		705	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		706	req->offs = SvVAL64 (offset);
		707	req->size = length;
		708
		709	REQ_SEND;
		710	}
		711
		712	void
		713	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		714	ALIAS:
		715	aio_stat = EIO_STAT
		716	aio_lstat = EIO_LSTAT
		717	PPCODE:
		718	{
		719	dREQ;
		720
		721	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
		722	if (!req->ptr2)
		723	{
		724	req_destroy (req);
		725	croak ("out of memory during aio_stat statdata allocation");
		726	}
		727
		728	req->flags |= EIO_FLAG_PTR2_FREE;
		729	req->sv1 = newSVsv (fh_or_path);
		730
		731	if (SvPOK (fh_or_path))
		732	{
		733	req->type = ix;
		734	req->ptr1 = SvPVbyte_nolen (req->sv1);
		735	}
		736	else
		737	{
		738	req->type = EIO_FSTAT;
		739	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		740	}
		741
		742	REQ_SEND;
		743	}
		744
		745	void
		746	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		747	PPCODE:
		748	{
		749	dREQ;
		750
		751	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		752	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		753	req->sv1 = newSVsv (fh_or_path);
		754
		755	if (SvPOK (fh_or_path))
		756	{
		757	req->type = EIO_UTIME;
		758	req->ptr1 = SvPVbyte_nolen (req->sv1);
		759	}
		760	else
		761	{
		762	req->type = EIO_FUTIME;
		763	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		764	}
		765
		766	REQ_SEND;
		767	}
		768
		769	void
		770	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		771	PPCODE:
		772	{
		773	dREQ;
		774
		775	req->sv1 = newSVsv (fh_or_path);
		776	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		777
		778	if (SvPOK (fh_or_path))
		779	{
		780	req->type = EIO_TRUNCATE;
		781	req->ptr1 = SvPVbyte_nolen (req->sv1);
		782	}
		783	else
		784	{
		785	req->type = EIO_FTRUNCATE;
		786	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		787	}
		788
		789	REQ_SEND;
		790	}
		791
		792	void
		793	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		794	ALIAS:
		795	aio_chmod = EIO_CHMOD
		796	aio_fchmod = EIO_FCHMOD
		797	aio_mkdir = EIO_MKDIR
		798	PPCODE:
		799	{
		800	dREQ;
		801
		802	req->type = ix;
		803	req->int2 = mode;
		804	req->sv1 = newSVsv (fh_or_path);
		805
		806	if (ix == EIO_FCHMOD)
		807	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		808	else
		809	req->ptr1 = SvPVbyte_nolen (req->sv1);
		810
		811	REQ_SEND;
		812	}
		813
		814	void
		815	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		816	PPCODE:
		817	{
		818	dREQ;
		819
		820	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		821	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		822	req->sv1 = newSVsv (fh_or_path);
		823
		824	if (SvPOK (fh_or_path))
		825	{
		826	req->type = EIO_CHOWN;
		827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		828	}
		829	else
		830	{
		831	req->type = EIO_FCHOWN;
		832	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		833	}
		834
		835	REQ_SEND;
		836	}
		837
		838	void
		839	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		840	ALIAS:
		841	aio_unlink = EIO_UNLINK
		842	aio_rmdir = EIO_RMDIR
		843	aio_readdir = EIO_READDIR
		844	PPCODE:
		845	{
		846	dREQ;
		847
		848	req->type = ix;
		849	req->sv1 = newSVsv (pathname);
		850	req->ptr1 = SvPVbyte_nolen (req->sv1);
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		857	ALIAS:
		858	aio_link = EIO_LINK
		859	aio_symlink = EIO_SYMLINK
		860	aio_rename = EIO_RENAME
		861	PPCODE:
		862	{
		863	dREQ;
		864
		865	req->type = ix;
		866	req->sv1 = newSVsv (oldpath);
		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
		868	req->sv2 = newSVsv (newpath);
		869	req->ptr2 = SvPVbyte_nolen (req->sv2);
		870
		871	REQ_SEND;
		872	}
		873
		874	void
		875	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		876	PPCODE:
		877	{
		878	dREQ;
		879
		880	req->type = EIO_MKNOD;
		881	req->sv1 = newSVsv (pathname);
		882	req->ptr1 = SvPVbyte_nolen (req->sv1);
		883	req->int2 = (mode_t)mode;
		884	req->offs = dev;
		885
		886	REQ_SEND;
		887	}
		888
		889	void
		890	aio_busy (double delay, SV *callback=&PL_sv_undef)
		891	PPCODE:
		892	{
		893	dREQ;
		894
		895	req->type = EIO_BUSY;
		896	req->nv1 = delay < 0. ? 0. : delay;
		897
		898	REQ_SEND;
		899	}
		900
		901	void
		902	aio_group (SV *callback=&PL_sv_undef)
		903	PROTOTYPE: ;$
		904	PPCODE:
		905	{
		906	dREQ;
		907
		908	req->type = EIO_GROUP;
		909
		910	eio_submit (req);
		911	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		912	}
		913
		914	void
		915	aio_nop (SV *callback=&PL_sv_undef)
		916	ALIAS:
		917	aio_nop = EIO_NOP
		918	aio_sync = EIO_SYNC
		919	PPCODE:
		920	{
		921	dREQ;
		922
		923	req->type = ix;
		924
		925	REQ_SEND;
		926	}
		927
		928	int
		929	aioreq_pri (int pri = 0)
		930	PROTOTYPE: ;$
		931	CODE:
		932	RETVAL = next_pri - EIO_PRI_BIAS;
		933	if (items > 0)
		934	{
		935	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		936	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		937	next_pri = pri + EIO_PRI_BIAS;
		938	}
		939	OUTPUT:
		940	RETVAL
		941
		942	void
		943	aioreq_nice (int nice = 0)
		944	CODE:
		945	nice = next_pri - nice;
		946	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		947	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		948	next_pri = nice + EIO_PRI_BIAS;
		949
		950	void
		951	flush ()
		952	PROTOTYPE:
		953	CODE:
		954	while (eio_nreqs ())
400	{	955	{
401	poll_wait ();	956	poll_wait ();
402	poll_cb ();	957	poll_cb ();
403	}	958	}
404	}
405		959
406	int	960	int
407	max_outstanding(nreqs)
408	int nreqs
409	PROTOTYPE: $
410	CODE:
411	RETVAL = max_outstanding;
412	max_outstanding = nreqs;
413
414	void
415	aio_open(pathname,flags,mode,callback)
416	SV * pathname
417	int flags
418	int mode
419	SV * callback
420	PROTOTYPE: $$$$
421	CODE:
422	{
423	aio_req req;
424
425	Newz (0, req, 1, aio_cb);
426
427	if (!req)
428	croak ("out of memory during aio_req allocation");
429
430	req->type = REQ_OPEN;
431	req->data = newSVsv (pathname);
432	req->dataptr = SvPV_nolen (req->data);
433	req->fd = flags;
434	req->mode = mode;
435	req->callback = SvREFCNT_inc (callback);
436
437	send_req (req);
438	}
439
440	void
441	aio_close(fh,callback)
442	InputStream fh
443	SV * callback
444	PROTOTYPE: $$
445	ALIAS:
446	aio_close = REQ_CLOSE
447	aio_fsync = REQ_FSYNC
448	aio_fdatasync = REQ_FDATASYNC
449	CODE:
450	{
451	aio_req req;
452
453	Newz (0, req, 1, aio_cb);
454
455	if (!req)
456	croak ("out of memory during aio_req allocation");
457
458	req->type = ix;
459	req->fd = PerlIO_fileno (fh);
460	req->callback = SvREFCNT_inc (callback);
461
462	send_req (req);
463	}
464
465	void
466	aio_read(fh,offset,length,data,dataoffset,callback)
467	InputStream fh
468	UV offset
469	IV length
470	SV * data
471	IV dataoffset
472	SV * callback
473	PROTOTYPE: $$$$$$
474	CODE:
475	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
476
477	void
478	aio_write(fh,offset,length,data,dataoffset,callback)
479	OutputStream fh
480	UV offset
481	IV length
482	SV * data
483	IV dataoffset
484	SV * callback
485	PROTOTYPE: $$$$$$
486	CODE:
487	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
488
489	void
490	aio_readahead(fh,offset,length,callback)
491	InputStream fh
492	UV offset
493	IV length
494	SV * callback
495	PROTOTYPE: $$$$
496	CODE:
497	{
498	aio_req req;
499
500	if (length < 0)
501	croak ("length must not be negative");
502
503	Newz (0, req, 1, aio_cb);
504
505	if (!req)
506	croak ("out of memory during aio_req allocation");
507
508	req->type = REQ_READAHEAD;
509	req->fd = PerlIO_fileno (fh);
510	req->offset = offset;
511	req->length = length;
512	req->callback = SvREFCNT_inc (callback);
513
514	send_req (req);
515	}
516
517	void
518	aio_stat(fh_or_path,callback)
519	SV * fh_or_path
520	SV * callback
521	PROTOTYPE: $$
522	ALIAS:
523	aio_lstat = 1
524	CODE:
525	{
526	aio_req req;
527
528	Newz (0, req, 1, aio_cb);
529
530	if (!req)
531	croak ("out of memory during aio_req allocation");
532
533	New (0, req->statdata, 1, Stat_t);
534
535	if (!req->statdata)
536	croak ("out of memory during aio_req->statdata allocation");
537
538	if (SvPOK (fh_or_path))
539	{
540	req->type = ix ? REQ_LSTAT : REQ_STAT;
541	req->data = newSVsv (fh_or_path);
542	req->dataptr = SvPV_nolen (req->data);
543	}
544	else
545	{
546	req->type = REQ_FSTAT;
547	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548	}
549
550	req->callback = SvREFCNT_inc (callback);
551
552	send_req (req);
553	}
554
555	void
556	aio_unlink(pathname,callback)
557	SV * pathname
558	SV * callback
559	PROTOTYPE: $$
560	CODE:
561	{
562	aio_req req;
563
564	Newz (0, req, 1, aio_cb);
565
566	if (!req)
567	croak ("out of memory during aio_req allocation");
568
569	req->type = REQ_UNLINK;
570	req->data = newSVsv (pathname);
571	req->dataptr = SvPV_nolen (req->data);
572	req->callback = SvREFCNT_inc (callback);
573
574	send_req (req);
575	}
576
577	void
578	flush()
579	PROTOTYPE:
580	CODE:
581	while (nreqs)
582	{
583	poll_wait ();
584	poll_cb ();
585	}
586
587	void
588	poll()	961	poll()
589	PROTOTYPE:	962	PROTOTYPE:
590	CODE:	963	CODE:
591	if (nreqs)
592	{
593	poll_wait ();	964	poll_wait ();
594	poll_cb ();	965	RETVAL = poll_cb ();
595	}	966	OUTPUT:
		967	RETVAL
596		968
597	int	969	int
598	poll_fileno()	970	poll_fileno()
599	PROTOTYPE:	971	PROTOTYPE:
600	CODE:	972	CODE:
…		…
612		984
613	void	985	void
614	poll_wait()	986	poll_wait()
615	PROTOTYPE:	987	PROTOTYPE:
616	CODE:	988	CODE:
617	if (nreqs)
618	poll_wait ();	989	poll_wait ();
619		990
620	int	991	int
621	nreqs()	992	nreqs()
622	PROTOTYPE:	993	PROTOTYPE:
623	CODE:	994	CODE:
624	RETVAL = nreqs;	995	RETVAL = eio_nreqs ();
625	OUTPUT:	996	OUTPUT:
626	RETVAL	997	RETVAL
627		998
		999	int
		1000	nready()
		1001	PROTOTYPE:
		1002	CODE:
		1003	RETVAL = eio_nready ();
		1004	OUTPUT:
		1005	RETVAL
		1006
		1007	int
		1008	npending()
		1009	PROTOTYPE:
		1010	CODE:
		1011	RETVAL = eio_npending ();
		1012	OUTPUT:
		1013	RETVAL
		1014
		1015	int
		1016	nthreads()
		1017	PROTOTYPE:
		1018	CODE:
		1019	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1020	RETVAL = started;
		1021	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1022	OUTPUT:
		1023	RETVAL
		1024
		1025	void _on_next_submit (SV *cb)
		1026	CODE:
		1027	SvREFCNT_dec (on_next_submit);
		1028	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1029
		1030	PROTOTYPES: DISABLE
		1031
		1032	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1033
		1034	void
		1035	cancel (aio_req_ornot req)
		1036	CODE:
		1037	eio_cancel (req);
		1038
		1039	void
		1040	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1041	CODE:
		1042	SvREFCNT_dec (req->callback);
		1043	req->callback = newSVsv (callback);
		1044
		1045	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1046
		1047	void
		1048	add (aio_req grp, ...)
		1049	PPCODE:
		1050	{
		1051	int i;
		1052
		1053	if (grp->int1 == 2)
		1054	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1055
		1056	for (i = 1; i < items; ++i )
		1057	{
		1058	aio_req req;
		1059
		1060	if (GIMME_V != G_VOID)
		1061	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1062
		1063	req = SvAIO_REQ (ST (i));
		1064
		1065	if (req)
		1066	eio_grp_add (grp, req);
		1067	}
		1068	}
		1069
		1070	void
		1071	cancel_subs (aio_req_ornot req)
		1072	CODE:
		1073	req_cancel_subs (req);
		1074
		1075	void
		1076	result (aio_req grp, ...)
		1077	CODE:
		1078	{
		1079	int i;
		1080	AV *av;
		1081
		1082	grp->errorno = errno;
		1083
		1084	av = newAV ();
		1085
		1086	for (i = 1; i < items; ++i )
		1087	av_push (av, newSVsv (ST (i)));
		1088
		1089	SvREFCNT_dec (grp->sv1);
		1090	grp->sv1 = (SV *)av;
		1091	}
		1092
		1093	void
		1094	errno (aio_req grp, int errorno = errno)
		1095	CODE:
		1096	grp->errorno = errorno;
		1097
		1098	void
		1099	limit (aio_req grp, int limit)
		1100	CODE:
		1101	eio_grp_limit (grp, limit);
		1102
		1103	void
		1104	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1105	CODE:
		1106	{
		1107	SvREFCNT_dec (grp->sv2);
		1108	grp->sv2 = newSVsv (callback);
		1109
		1110	if (grp->int2 <= 0)
		1111	grp->int2 = 2;
		1112
		1113	eio_grp_limit (grp, grp->int2);
		1114	}
		1115

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