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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.1 by root, Sun Jul 10 17:07:44 2005 UTC vs.
Revision 1.138 by root, Tue Apr 21 20:06:05 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 <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
7	#include <sys/types.h>	12	#include <sys/types.h>
8	#include <sys/stat.h>	13	#include <sys/stat.h>
9	#include <unistd.h>	14	#include <limits.h>
10	#include <fcntl.h>	15	#include <fcntl.h>
11	#include <signal.h>
12	#include <sched.h>	16	#include <sched.h>
13	#include <endian.h>
14		17
15	#include <pthread.h>	18	/* perl namespace pollution */
16	#include <sys/syscall.h>	19	#undef VERSION
17		20
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	#ifdef _WIN32
19	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
20	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
21		22
22	#if __i386 || __amd64	23	# define EIO_STRUCT_DIRENT Direntry_t
23	# define STACKSIZE ( 256 * sizeof (long))	24	# undef malloc
24	#elif __ia64	25	# undef free
25	# define STACKSIZE (8192 * sizeof (long))	26
		27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
26	#else	59	#else
27	# define STACKSIZE ( 512 * sizeof (long))	60
		61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
28	#endif	68	#endif
29		69
		70	/* perl stupidly overrides readdir and maybe others */
		71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
		83	#endif
		84
		85	/*****************************************************************************/
		86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
		91	#endif
		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	static HV *stash;
		99	typedef SV SV8; /* byte-sv, used for argument-checking */
		100
		101	#define AIO_REQ_KLASS "IO::AIO::REQ"
		102	#define AIO_GRP_KLASS "IO::AIO::GRP"
		103
		104	#define EIO_REQ_MEMBERS \
		105	SV *callback; \
		106	SV *sv1, *sv2; \
		107	STRLEN stroffset; \
		108	SV *self;
		109
		110	#define EIO_NO_WRAPPERS 1
		111
		112	#include "libeio/eio.h"
		113
		114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
		118
30	enum {	119	enum {
31	REQ_QUIT,	120	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	};	121	};
37		122
38	typedef struct aio_cb {	123	#include "libeio/eio.c"
39	struct aio_cb *next;
40		124
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
56	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
57		127
58	static int started;	128	static SV *on_next_submit;
59	static int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
60	static int reqpipe[2], respipe[2];	130	static int max_outstanding;
61		131
62	static aio_req qs, qe; /* queue start, queue end */	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
63		133
64	static void *aio_proc(void *arg);	134	static void req_destroy (aio_req req);
		135	static void req_cancel (aio_req req);
65		136
66	static void	137	static void want_poll (void)
67	start_thread (void)
68	{	138	{
69	sigset_t fullsigset, oldsigset;	139	/* write a dummy byte to the pipe so fh becomes ready */
70	pthread_t tid;	140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
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	}	141	}
85		142
86	static void	143	static void done_poll (void)
87	send_reqs (void)
88	{	144	{
89	/* this write is atomic */	145	/* read any signals sent by the worker threads */
90	while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)	146	char buf [4];
91	{	147	while (respipe_read (respipe [0], buf, 4) == 4)
92	qs = qs->next;	148	;
93	if (!qs) qe = 0;
94	}
95	}	149	}
96		150
97	static void	151	/* must be called at most once */
98	send_req (aio_req req)	152	static SV *req_sv (aio_req req, const char *klass)
99	{	153	{
100	nreqs++;	154	if (!req->self)
101	req->next = 0;
102
103	if (qe)
104	{	155	{
105	qe->next = req;	156	req->self = (SV *)newHV ();
106	qe = req;	157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
107	}	158	}
108	else
109	qe = qs = req;
110		159
111	send_reqs ();	160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
112	}	161	}
113		162
114	static void	163	static aio_req SvAIO_REQ (SV *sv)
115	end_thread (void)
116	{	164	{
117	aio_req req;	165	MAGIC *mg;
118	New (0, req, 1, aio_cb);
119	req->type = REQ_QUIT;
120		166
121	send_req (req);	167	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
122	}	168	croak ("object of class " AIO_REQ_KLASS " expected");
123		169
124	static void	170	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
125	read_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		171
133	SvUPGRADE (data, SVt_PV);	172	return mg ? (aio_req)mg->mg_ptr : 0;
134	SvPOK_on (data);	173	}
135		174
136	if (dataoffset < 0)	175	static void aio_grp_feed (aio_req grp)
137	dataoffset += svlen;	176	{
138		177	if (grp->sv2 && SvOK (grp->sv2))
139	if (dataoffset < 0 || dataoffset > svlen)
140	croak ("data offset outside of string");
141
142	if (dowrite)
143	{	178	{
144	/* write: check length and adjust. */	179	dSP;
145	if (length < 0 || length + dataoffset > svlen)	180
146	length = svlen - dataoffset;	181	ENTER;
		182	SAVETMPS;
		183	PUSHMARK (SP);
		184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		185	PUTBACK;
		186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		187	SPAGAIN;
		188	FREETMPS;
		189	LEAVE;
147	}	190	}
148	else	191	}
		192
		193	static void req_submit (eio_req *req)
		194	{
		195	eio_submit (req);
		196
		197	if (expect_false (on_next_submit))
149	{	198	{
150	/* read: grow scalar as necessary */	199	dSP;
151	svptr = SvGROW (data, length + dataoffset);	200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
152	}	207	}
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	}	208	}
172		209
173	static void	210	static int req_invoke (eio_req *req)
174	poll_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
183	static int
184	poll_cb (pTHX)
185	{	211	{
186	dSP;	212	dSP;
187	int count = 0;
188	aio_req req;
189		213
190	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
191	{	218	{
192	nreqs--;	219	ENTER;
193		220	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);	221	PUSHMARK (SP);
218	XPUSHs (sv_2mortal (newSViv (req->result)));	222	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
239	static void *
240	aio_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		223
249	switch (req->type)	224	switch (req->type)
250	{	225	{
251	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	226	case EIO_READDIR:
252	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;	227	{
253	#if SYS_readahead	228	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		229
259	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	230	if (req->result >= 0)
260	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	231	{
261	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	232	int i;
		233	char *buf = req->ptr2;
		234	AV *av = newAV ();
262		235
263	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	236	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		237
267	case REQ_FSYNC: req->result = fsync (req->fd); break;	238	for (i = 0; i < req->result; ++i)
268	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	239	{
		240	SV *sv = newSVpv (buf, 0);
269		241
		242	av_store (av, i, sv);
		243	buf += SvCUR (sv) + 1;
		244	}
		245
		246	rv = sv_2mortal (newRV_noinc ((SV *)av));
		247	}
		248
		249	PUSHs (rv);
		250	}
		251	break;
		252
		253	case EIO_OPEN:
		254	{
		255	/* convert fd to fh */
		256	SV *fh = &PL_sv_undef;
		257
		258	if (req->result >= 0)
		259	{
		260	GV *gv = (GV *)sv_newmortal ();
		261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
		267
		268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
		280	PUSHs (fh);
		281	}
		282	break;
		283
		284	case EIO_GROUP:
		285	req->int1 = 2; /* mark group as finished */
		286
		287	if (req->sv1)
		288	{
		289	int i;
		290	AV *av = (AV *)req->sv1;
		291
		292	EXTEND (SP, AvFILL (av) + 1);
		293	for (i = 0; i <= AvFILL (av); ++i)
		294	PUSHs (*av_fetch (av, i, 0));
		295	}
		296	break;
		297
		298	case EIO_NOP:
270	case REQ_QUIT:	299	case EIO_BUSY:
271	write (respipe[1], (void *)&req, sizeof (req));	300	break;
272	return 0;	301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	{
		318	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		319	*SvEND (req->sv2) = 0;
		320	SvPOK_only (req->sv2);
		321	SvSETMAGIC (req->sv2);
		322	PUSHs (sv_2mortal (newSViv (req->result)));
		323	}
		324	break;
		325
		326	case EIO_DUP2:
		327	if (req->result > 0)
		328	req->result = 0;
		329	/* FALLTHROUGH */
273		330
274	default:	331	default:
275	req->result = ENOSYS;	332	PUSHs (sv_2mortal (newSViv (req->result)));
276	break;	333	break;
277	}	334	}
278		335
279	req->errorno = errno;	336	errno = req->errorno;
280	write (respipe[1], (void *)&req, sizeof (req));	337
		338	PUTBACK;
		339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		340	SPAGAIN;
		341
		342	FREETMPS;
		343	LEAVE;
		344
		345	PUTBACK;
281	}	346	}
282		347
		348	return !!SvTRUE (ERRSV);
		349	}
		350
		351	static void req_destroy (aio_req req)
		352	{
		353	if (req->self)
		354	{
		355	sv_unmagic (req->self, PERL_MAGIC_ext);
		356	SvREFCNT_dec (req->self);
		357	}
		358
		359	SvREFCNT_dec (req->sv1);
		360	SvREFCNT_dec (req->sv2);
		361	SvREFCNT_dec (req->callback);
		362
		363	Safefree (req);
		364	}
		365
		366	static void req_cancel_subs (aio_req grp)
		367	{
		368	aio_req sub;
		369
		370	if (grp->type != EIO_GROUP)
		371	return;
		372
		373	SvREFCNT_dec (grp->sv2);
		374	grp->sv2 = 0;
		375
		376	eio_grp_cancel (grp);
		377	}
		378
		379	#ifdef USE_SOCKETS_AS_HANDLES
		380	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		381	#else
		382	# define TO_SOCKET(x) (x)
		383	#endif
		384
		385	static void
		386	create_respipe (void)
		387	{
		388	int old_readfd = respipe [0];
		389
		390	if (respipe [1] >= 0)
		391	respipe_close (TO_SOCKET (respipe [1]));
		392
		393	#ifdef _WIN32
		394	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		395	#else
		396	if (pipe (respipe))
		397	#endif
		398	croak ("unable to initialize result pipe");
		399
		400	if (old_readfd >= 0)
		401	{
		402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		403	croak ("unable to initialize result pipe(2)");
		404
		405	respipe_close (respipe [0]);
		406	respipe [0] = old_readfd;
		407	}
		408
		409	#ifdef _WIN32
		410	int arg = 1;
		411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		413	#else
		414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
		418
		419	respipe_osf [0] = TO_SOCKET (respipe [0]);
		420	respipe_osf [1] = TO_SOCKET (respipe [1]);
		421	}
		422
		423	static void poll_wait (void)
		424	{
		425	fd_set rfd;
		426
		427	while (eio_nreqs ())
		428	{
		429	int size;
		430
		431	X_LOCK (reslock);
		432	size = res_queue.size;
		433	X_UNLOCK (reslock);
		434
		435	if (size)
		436	return;
		437
		438	etp_maybe_start_thread ();
		439
		440	FD_ZERO (&rfd);
		441	FD_SET (respipe [0], &rfd);
		442
		443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		444	}
		445	}
		446
		447	static int poll_cb (void)
		448	{
		449	for (;;)
		450	{
		451	int res = eio_poll ();
		452
		453	if (res > 0)
		454	croak (0);
		455
		456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
		458
		459	poll_wait ();
		460	}
		461	}
		462
		463	static void atfork_child (void)
		464	{
		465	create_respipe ();
		466	}
		467
		468	static SV *
		469	get_cb (SV *cb_sv)
		470	{
		471	HV *st;
		472	GV *gvp;
		473	CV *cv;
		474
		475	if (!SvOK (cb_sv))
283	return 0;	476	return 0;
		477
		478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		479
		480	if (!cv)
		481	croak ("IO::AIO callback must be undef or a CODE reference");
		482
		483	return (SV *)cv;
		484	}
		485
		486	#define dREQ \
		487	SV *cb_cv; \
		488	aio_req req; \
		489	int req_pri = next_pri; \
		490	next_pri = EIO_PRI_DEFAULT; \
		491	\
		492	cb_cv = get_cb (callback); \
		493	\
		494	Newz (0, req, 1, eio_req); \
		495	if (!req) \
		496	croak ("out of memory during eio_req allocation"); \
		497	\
		498	req->callback = SvREFCNT_inc (cb_cv); \
		499	req->pri = req_pri
		500
		501	#define REQ_SEND \
		502	PUTBACK; \
		503	req_submit (req); \
		504	SPAGAIN; \
		505	\
		506	if (GIMME_V != G_VOID) \
		507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		508
		509	static int
		510	extract_fd (SV *fh, int wr)
		511	{
		512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		513
		514	if (fd < 0)
		515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		516
		517	return fd;
284	}	518	}
285		519
286	MODULE = IO::AIO PACKAGE = IO::AIO	520	MODULE = IO::AIO PACKAGE = IO::AIO
287		521
		522	PROTOTYPES: ENABLE
		523
288	BOOT:	524	BOOT:
289	{	525	{
290	if (pipe (reqpipe) || pipe (respipe))	526	stash = gv_stashpv ("IO::AIO", 1);
291	croak ("unable to initialize request or result pipe");
292		527
293	if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
294	croak ("cannot set result pipe to nonblocking mode");	529	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		530	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		531	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		532	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		533	#ifndef _WIN32
		534	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		535	#endif
		536	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		537	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		538	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		539	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
295		540
296	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))	541	create_respipe ();
297	croak ("cannot set result pipe to nonblocking mode");
298	}
299		542
		543	if (eio_init (want_poll, done_poll) < 0)
		544	croak ("IO::AIO: unable to initialise eio library");
		545
		546	/* atfork child called in fifo order, so before eio's handler */
		547	X_THREAD_ATFORK (0, 0, atfork_child);
		548	}
		549
300	void	550	void
301	min_parallel(nthreads)	551	max_poll_reqs (int nreqs)
302	int nthreads
303	PROTOTYPE: $	552	PROTOTYPE: $
304	CODE:	553	CODE:
305	while (nthreads > started)	554	eio_set_max_poll_reqs (nreqs);
306	start_thread ();
307		555
308	void	556	void
309	max_parallel(nthreads)	557	max_poll_time (double nseconds)
310	int nthreads
311	PROTOTYPE: $	558	PROTOTYPE: $
312	CODE:	559	CODE:
		560	eio_set_max_poll_time (nseconds);
		561
		562	void
		563	min_parallel (int nthreads)
		564	PROTOTYPE: $
		565	CODE:
		566	eio_set_min_parallel (nthreads);
		567
		568	void
		569	max_parallel (int nthreads)
		570	PROTOTYPE: $
		571	CODE:
		572	eio_set_max_parallel (nthreads);
		573
		574	void
		575	max_idle (int nthreads)
		576	PROTOTYPE: $
		577	CODE:
		578	eio_set_max_idle (nthreads);
		579
		580	void
		581	max_outstanding (int maxreqs)
		582	PROTOTYPE: $
		583	CODE:
		584	max_outstanding = maxreqs;
		585
		586	void
		587	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		588	PROTOTYPE: $$$;$
		589	PPCODE:
313	{	590	{
314	int cur = started;	591	dREQ;
315	while (cur > nthreads)	592
316	{	593	req->type = EIO_OPEN;
317	end_thread ();	594	req->sv1 = newSVsv (pathname);
		595	req->ptr1 = SvPVbyte_nolen (req->sv1);
		596	req->int1 = flags;
		597	req->int2 = mode;
		598
		599	REQ_SEND;
		600	}
		601
		602	void
		603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		604	PROTOTYPE: $;$
		605	ALIAS:
		606	aio_fsync = EIO_FSYNC
		607	aio_fdatasync = EIO_FDATASYNC
		608	PPCODE:
		609	{
		610	int fd = extract_fd (fh, 0);
		611	dREQ;
		612
		613	req->type = ix;
		614	req->sv1 = newSVsv (fh);
		615	req->int1 = fd;
		616
		617	REQ_SEND (req);
		618	}
		619
		620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
		668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		669	ALIAS:
		670	aio_read = EIO_READ
		671	aio_write = EIO_WRITE
		672	PROTOTYPE: $$$$$;$
		673	PPCODE:
		674	{
		675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
		677	char *svptr = SvPVbyte (data, svlen);
		678	UV len = SvUV (length);
		679
		680	if (dataoffset < 0)
		681	dataoffset += svlen;
		682
		683	if (dataoffset < 0 || dataoffset > svlen)
		684	croak ("dataoffset outside of data scalar");
		685
		686	if (ix == EIO_WRITE)
		687	{
		688	/* write: check length and adjust. */
		689	if (!SvOK (length) || len + dataoffset > svlen)
		690	len = svlen - dataoffset;
		691	}
		692	else
		693	{
		694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
		696	svptr = SvGROW (data, len + dataoffset + 1);
		697	}
		698
		699	if (len < 0)
		700	croak ("length must not be negative");
		701
		702	{
		703	dREQ;
		704
		705	req->type = ix;
		706	req->sv1 = newSVsv (fh);
		707	req->int1 = fd;
		708	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		709	req->size = len;
		710	req->sv2 = SvREFCNT_inc (data);
		711	req->ptr2 = (char *)svptr + dataoffset;
		712	req->stroffset = dataoffset;
		713
		714	if (!SvREADONLY (data))
318	cur--;	715	{
		716	SvREADONLY_on (data);
		717	req->flags |= FLAG_SV2_RO_OFF;
319	}	718	}
320		719
321	while (started > nthreads)	720	REQ_SEND;
		721	}
		722	}
		723
		724	void
		725	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		726	PROTOTYPE: $$;$
		727	PPCODE:
		728	{
		729	SV *data;
		730	dREQ;
		731
		732	req->type = EIO_READLINK;
		733	req->sv1 = newSVsv (path);
		734	req->ptr1 = SvPVbyte_nolen (req->sv1);
		735
		736	REQ_SEND;
		737	}
		738
		739	void
		740	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		741	PROTOTYPE: $$$$;$
		742	PPCODE:
		743	{
		744	int ifd = extract_fd (in_fh , 0);
		745	int ofd = extract_fd (out_fh, 0);
		746	dREQ;
		747
		748	req->type = EIO_SENDFILE;
		749	req->sv1 = newSVsv (out_fh);
		750	req->int1 = ofd;
		751	req->sv2 = newSVsv (in_fh);
		752	req->int2 = ifd;
		753	req->offs = SvVAL64 (in_offset);
		754	req->size = length;
		755
		756	REQ_SEND;
		757	}
		758
		759	void
		760	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		761	PROTOTYPE: $$$;$
		762	PPCODE:
		763	{
		764	int fd = extract_fd (fh, 0);
		765	dREQ;
		766
		767	req->type = EIO_READAHEAD;
		768	req->sv1 = newSVsv (fh);
		769	req->int1 = fd;
		770	req->offs = SvVAL64 (offset);
		771	req->size = length;
		772
		773	REQ_SEND;
		774	}
		775
		776	void
		777	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		778	ALIAS:
		779	aio_stat = EIO_STAT
		780	aio_lstat = EIO_LSTAT
		781	PPCODE:
		782	{
		783	dREQ;
		784
		785	req->sv1 = newSVsv (fh_or_path);
		786
		787	if (SvPOK (req->sv1))
		788	{
		789	req->type = ix;
		790	req->ptr1 = SvPVbyte_nolen (req->sv1);
		791	}
		792	else
		793	{
		794	req->type = EIO_FSTAT;
		795	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		796	}
		797
		798	REQ_SEND;
		799	}
		800
		801	void
		802	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		803	PPCODE:
		804	{
		805	dREQ;
		806
		807	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		808	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		809	req->sv1 = newSVsv (fh_or_path);
		810
		811	if (SvPOK (req->sv1))
		812	{
		813	req->type = EIO_UTIME;
		814	req->ptr1 = SvPVbyte_nolen (req->sv1);
		815	}
		816	else
		817	{
		818	req->type = EIO_FUTIME;
		819	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		820	}
		821
		822	REQ_SEND;
		823	}
		824
		825	void
		826	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		827	PPCODE:
		828	{
		829	dREQ;
		830
		831	req->sv1 = newSVsv (fh_or_path);
		832	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		833
		834	if (SvPOK (req->sv1))
		835	{
		836	req->type = EIO_TRUNCATE;
		837	req->ptr1 = SvPVbyte_nolen (req->sv1);
		838	}
		839	else
		840	{
		841	req->type = EIO_FTRUNCATE;
		842	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		843	}
		844
		845	REQ_SEND;
		846	}
		847
		848	void
		849	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		850	ALIAS:
		851	aio_chmod = EIO_CHMOD
		852	aio_mkdir = EIO_MKDIR
		853	PPCODE:
		854	{
		855	dREQ;
		856
		857	req->int2 = mode;
		858	req->sv1 = newSVsv (fh_or_path);
		859
		860	if (SvPOK (req->sv1))
		861	{
		862	req->type = ix;
		863	req->ptr1 = SvPVbyte_nolen (req->sv1);
		864	}
		865	else
		866	{
		867	req->type = EIO_FCHMOD;
		868	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		869	}
		870
		871	REQ_SEND;
		872	}
		873
		874	void
		875	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		876	PPCODE:
		877	{
		878	dREQ;
		879
		880	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		881	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		882	req->sv1 = newSVsv (fh_or_path);
		883
		884	if (SvPOK (req->sv1))
		885	{
		886	req->type = EIO_CHOWN;
		887	req->ptr1 = SvPVbyte_nolen (req->sv1);
		888	}
		889	else
		890	{
		891	req->type = EIO_FCHOWN;
		892	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		893	}
		894
		895	REQ_SEND;
		896	}
		897
		898	void
		899	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		900	ALIAS:
		901	aio_unlink = EIO_UNLINK
		902	aio_rmdir = EIO_RMDIR
		903	aio_readdir = EIO_READDIR
		904	PPCODE:
		905	{
		906	dREQ;
		907
		908	req->type = ix;
		909	req->sv1 = newSVsv (pathname);
		910	req->ptr1 = SvPVbyte_nolen (req->sv1);
		911
		912	REQ_SEND;
		913	}
		914
		915	void
		916	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		917	ALIAS:
		918	aio_link = EIO_LINK
		919	aio_symlink = EIO_SYMLINK
		920	aio_rename = EIO_RENAME
		921	PPCODE:
		922	{
		923	dREQ;
		924
		925	req->type = ix;
		926	req->sv1 = newSVsv (oldpath);
		927	req->ptr1 = SvPVbyte_nolen (req->sv1);
		928	req->sv2 = newSVsv (newpath);
		929	req->ptr2 = SvPVbyte_nolen (req->sv2);
		930
		931	REQ_SEND;
		932	}
		933
		934	void
		935	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		936	PPCODE:
		937	{
		938	dREQ;
		939
		940	req->type = EIO_MKNOD;
		941	req->sv1 = newSVsv (pathname);
		942	req->ptr1 = SvPVbyte_nolen (req->sv1);
		943	req->int2 = (mode_t)mode;
		944	req->offs = dev;
		945
		946	REQ_SEND;
		947	}
		948
		949	void
		950	aio_busy (double delay, SV *callback=&PL_sv_undef)
		951	PPCODE:
		952	{
		953	dREQ;
		954
		955	req->type = EIO_BUSY;
		956	req->nv1 = delay < 0. ? 0. : delay;
		957
		958	REQ_SEND;
		959	}
		960
		961	void
		962	aio_group (SV *callback=&PL_sv_undef)
		963	PROTOTYPE: ;$
		964	PPCODE:
		965	{
		966	dREQ;
		967
		968	req->type = EIO_GROUP;
		969
		970	req_submit (req);
		971	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		972	}
		973
		974	void
		975	aio_nop (SV *callback=&PL_sv_undef)
		976	ALIAS:
		977	aio_nop = EIO_NOP
		978	aio_sync = EIO_SYNC
		979	PPCODE:
		980	{
		981	dREQ;
		982
		983	req->type = ix;
		984
		985	REQ_SEND;
		986	}
		987
		988	int
		989	aioreq_pri (int pri = 0)
		990	PROTOTYPE: ;$
		991	CODE:
		992	RETVAL = next_pri;
		993	if (items > 0)
		994	{
		995	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		996	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		997	next_pri = pri;
		998	}
		999	OUTPUT:
		1000	RETVAL
		1001
		1002	void
		1003	aioreq_nice (int nice = 0)
		1004	CODE:
		1005	nice = next_pri - nice;
		1006	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1007	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1008	next_pri = nice;
		1009
		1010	void
		1011	flush ()
		1012	PROTOTYPE:
		1013	CODE:
		1014	while (eio_nreqs ())
322	{	1015	{
323	poll_wait ();	1016	poll_wait ();
324	poll_cb (aTHX);	1017	poll_cb ();
325	}
326	}
327
328	void
329	aio_open(pathname,flags,mode,callback)
330	SV * pathname
331	int flags
332	int mode
333	SV * callback
334	PROTOTYPE: $$$$
335	CODE:
336	{
337	aio_req req;
338
339	Newz (0, req, 1, aio_cb);
340
341	if (!req)
342	croak ("out of memory during aio_req allocation");
343
344	req->type = REQ_OPEN;
345	req->data = newSVsv (pathname);
346	req->dataptr = SvPV_nolen (req->data);
347	req->fd = flags;
348	req->mode = mode;
349	req->callback = SvREFCNT_inc (callback);
350
351	send_req (req);
352	}
353
354	void
355	aio_close(fh,callback)
356	InputStream fh
357	SV * callback
358	PROTOTYPE: $$
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
379	void
380	aio_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: $$$$$$
388	CODE:
389	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
390
391	void
392	aio_write(fh,offset,length,data,dataoffset,callback)
393	OutputStream fh
394	UV offset
395	IV length
396	SV * data
397	IV dataoffset
398	SV * callback
399	PROTOTYPE: $$$$$$
400	CODE:
401	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
402
403	void
404	aio_readahead(fh,offset,length,callback)
405	InputStream fh
406	UV offset
407	IV length
408	SV * callback
409	PROTOTYPE: $$$$
410	CODE:
411	{
412	aio_req req;
413
414	if (length < 0)
415	croak ("length must not be negative");
416
417	Newz (0, req, 1, aio_cb);
418
419	if (!req)
420	croak ("out of memory during aio_req allocation");
421
422	req->type = REQ_READAHEAD;
423	req->fd = PerlIO_fileno (fh);
424	req->offset = offset;
425	req->length = length;
426	req->callback = SvREFCNT_inc (callback);
427
428	send_req (req);
429	}
430
431	void
432	aio_stat(fh_or_path,callback)
433	SV * fh_or_path
434	SV * callback
435	PROTOTYPE: $$
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	{	1018	}
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		1019
464	req->callback = SvREFCNT_inc (callback);	1020	int
465		1021	poll()
466	send_req (req);
467	}
468
469	void
470	aio_unlink(pathname,callback)
471	SV * pathname
472	SV * callback
473	PROTOTYPE: $$	1022	PROTOTYPE:
474	CODE:	1023	CODE:
475	{	1024	poll_wait ();
476	aio_req req;	1025	RETVAL = poll_cb ();
477		1026	OUTPUT:
478	Newz (0, req, 1, aio_cb);	1027	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		1028
491	int	1029	int
492	poll_fileno()	1030	poll_fileno()
493	PROTOTYPE:	1031	PROTOTYPE:
494	CODE:	1032	CODE:
495	RETVAL = respipe[0];	1033	RETVAL = respipe [0];
496	OUTPUT:	1034	OUTPUT:
497	RETVAL	1035	RETVAL
498		1036
499	int	1037	int
500	poll_cb(...)	1038	poll_cb(...)
501	PROTOTYPE:	1039	PROTOTYPE:
502	CODE:	1040	CODE:
503	RETVAL = poll_cb (aTHX);	1041	RETVAL = poll_cb ();
504	OUTPUT:	1042	OUTPUT:
505	RETVAL	1043	RETVAL
506		1044
507	void	1045	void
508	poll_wait()	1046	poll_wait()
…		…
512		1050
513	int	1051	int
514	nreqs()	1052	nreqs()
515	PROTOTYPE:	1053	PROTOTYPE:
516	CODE:	1054	CODE:
517	RETVAL = nreqs;	1055	RETVAL = eio_nreqs ();
518	OUTPUT:	1056	OUTPUT:
519	RETVAL	1057	RETVAL
520		1058
		1059	int
		1060	nready()
		1061	PROTOTYPE:
		1062	CODE:
		1063	RETVAL = eio_nready ();
		1064	OUTPUT:
		1065	RETVAL
		1066
		1067	int
		1068	npending()
		1069	PROTOTYPE:
		1070	CODE:
		1071	RETVAL = eio_npending ();
		1072	OUTPUT:
		1073	RETVAL
		1074
		1075	int
		1076	nthreads()
		1077	PROTOTYPE:
		1078	CODE:
		1079	RETVAL = eio_nthreads ();
		1080	OUTPUT:
		1081	RETVAL
		1082
		1083	void _on_next_submit (SV *cb)
		1084	CODE:
		1085	SvREFCNT_dec (on_next_submit);
		1086	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1087
		1088	PROTOTYPES: DISABLE
		1089
		1090	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1091
		1092	void
		1093	cancel (aio_req_ornot req)
		1094	CODE:
		1095	eio_cancel (req);
		1096
		1097	void
		1098	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1099	PPCODE:
		1100	{
		1101	if (GIMME_V != G_VOID)
		1102	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1103
		1104	if (items > 1)
		1105	{
		1106	SV *cb_cv = get_cb (callback);
		1107
		1108	SvREFCNT_dec (req->callback);
		1109	req->callback = SvREFCNT_inc (cb_cv);
		1110	}
		1111	}
		1112
		1113	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1114
		1115	void
		1116	add (aio_req grp, ...)
		1117	PPCODE:
		1118	{
		1119	int i;
		1120
		1121	if (grp->int1 == 2)
		1122	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1123
		1124	for (i = 1; i < items; ++i )
		1125	{
		1126	aio_req req;
		1127
		1128	if (GIMME_V != G_VOID)
		1129	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1130
		1131	req = SvAIO_REQ (ST (i));
		1132
		1133	if (req)
		1134	eio_grp_add (grp, req);
		1135	}
		1136	}
		1137
		1138	void
		1139	cancel_subs (aio_req_ornot req)
		1140	CODE:
		1141	req_cancel_subs (req);
		1142
		1143	void
		1144	result (aio_req grp, ...)
		1145	CODE:
		1146	{
		1147	int i;
		1148	AV *av;
		1149
		1150	grp->errorno = errno;
		1151
		1152	av = newAV ();
		1153
		1154	for (i = 1; i < items; ++i )
		1155	av_push (av, newSVsv (ST (i)));
		1156
		1157	SvREFCNT_dec (grp->sv1);
		1158	grp->sv1 = (SV *)av;
		1159	}
		1160
		1161	void
		1162	errno (aio_req grp, int errorno = errno)
		1163	CODE:
		1164	grp->errorno = errorno;
		1165
		1166	void
		1167	limit (aio_req grp, int limit)
		1168	CODE:
		1169	eio_grp_limit (grp, limit);
		1170
		1171	void
		1172	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1173	CODE:
		1174	{
		1175	SvREFCNT_dec (grp->sv2);
		1176	grp->sv2 = newSVsv (callback);
		1177	grp->feed = aio_grp_feed;
		1178
		1179	if (grp->int2 <= 0)
		1180	grp->int2 = 2;
		1181
		1182	eio_grp_limit (grp, grp->int2);
		1183	}
		1184

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