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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs.
Revision 1.130 by root, Thu Oct 2 11:35:03 2008 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 aio_grp_feed (eio_req *grp);
		117	#define EIO_FEED(req) aio_grp_feed (req)
		118	static void req_destroy (eio_req *grp);
		119	#define EIO_DESTROY(req) req_destroy (req)
		120
30	enum {	121	enum {
31	REQ_QUIT,	122	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	};	123	};
37		124
38	typedef struct aio_cb {	125	#include "libeio/eio.c"
39	struct aio_cb *volatile next;
40		126
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;	127	typedef eio_req *aio_req;
		128	typedef eio_req *aio_req_ornot;
57		129
58	static int started;	130	static SV *on_next_submit;
59	static int nreqs;	131	static int next_pri = EIO_PRI_DEFAULT;
60	static int respipe [2];	132	static int max_outstanding;
61		133
62	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	134	static int respipe_osf [2], respipe [2] = { -1, -1 };
63	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
64	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65		135
66	static volatile aio_req reqs, reqe; /* queue start, queue end */	136	static void req_destroy (aio_req req);
67	static volatile aio_req ress, rese; /* queue start, queue end */	137	static void req_cancel (aio_req req);
68		138
69	static void *aio_proc(void *arg);	139	static void want_poll (void)
		140	{
		141	/* write a dummy byte to the pipe so fh becomes ready */
		142	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		143	}
		144
		145	static void done_poll (void)
		146	{
		147	/* read any signals sent by the worker threads */
		148	char buf [4];
		149	while (respipe_read (respipe [0], buf, 4) == 4)
		150	;
		151	}
		152
		153	/* must be called at most once */
		154	static SV *req_sv (aio_req req, const char *klass)
		155	{
		156	if (!req->self)
		157	{
		158	req->self = (SV *)newHV ();
		159	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		160	}
		161
		162	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		163	}
		164
		165	static aio_req SvAIO_REQ (SV *sv)
		166	{
		167	MAGIC *mg;
		168
		169	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		170	croak ("object of class " AIO_REQ_KLASS " expected");
		171
		172	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		173
		174	return mg ? (aio_req)mg->mg_ptr : 0;
		175	}
		176
		177	static void aio_grp_feed (aio_req grp)
		178	{
		179	if (grp->sv2 && SvOK (grp->sv2))
		180	{
		181	dSP;
		182
		183	ENTER;
		184	SAVETMPS;
		185	PUSHMARK (SP);
		186	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		187	PUTBACK;
		188	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		189	SPAGAIN;
		190	FREETMPS;
		191	LEAVE;
		192	}
		193	}
		194
		195	static void req_submit (eio_req *req)
		196	{
		197	eio_submit (req);
		198
		199	if (expect_false (on_next_submit))
		200	{
		201	dSP;
		202	SV *cb = sv_2mortal (on_next_submit);
		203
		204	on_next_submit = 0;
		205
		206	PUSHMARK (SP);
		207	PUTBACK;
		208	call_sv (cb, G_DISCARD | G_EVAL);
		209	}
		210	}
		211
		212	static int req_invoke (eio_req *req)
		213	{
		214	dSP;
		215
		216	if (req->flags & FLAG_SV2_RO_OFF)
		217	SvREADONLY_off (req->sv2);
		218
		219	if (!EIO_CANCELLED (req) && req->callback)
		220	{
		221	ENTER;
		222	SAVETMPS;
		223	PUSHMARK (SP);
		224	EXTEND (SP, 1);
		225
		226	switch (req->type)
		227	{
		228	case EIO_READDIR:
		229	{
		230	SV *rv = &PL_sv_undef;
		231
		232	if (req->result >= 0)
		233	{
		234	int i;
		235	char *buf = req->ptr2;
		236	AV *av = newAV ();
		237
		238	av_extend (av, req->result - 1);
		239
		240	for (i = 0; i < req->result; ++i)
		241	{
		242	SV *sv = newSVpv (buf, 0);
		243
		244	av_store (av, i, sv);
		245	buf += SvCUR (sv) + 1;
		246	}
		247
		248	rv = sv_2mortal (newRV_noinc ((SV *)av));
		249	}
		250
		251	PUSHs (rv);
		252	}
		253	break;
		254
		255	case EIO_OPEN:
		256	{
		257	/* convert fd to fh */
		258	SV *fh = &PL_sv_undef;
		259
		260	if (req->result >= 0)
		261	{
		262	GV *gv = (GV *)sv_newmortal ();
		263	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		264	char sym [64];
		265	int symlen;
		266
		267	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		268	gv_init (gv, stash, sym, symlen, 0);
		269
		270	symlen = snprintf (
		271	sym,
		272	sizeof (sym),
		273	"%s&=%d",
		274	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		275	req->result
		276	);
		277
		278	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		279	fh = (SV *)gv;
		280	}
		281
		282	PUSHs (fh);
		283	}
		284	break;
		285
		286	case EIO_GROUP:
		287	req->int1 = 2; /* mark group as finished */
		288
		289	if (req->sv1)
		290	{
		291	int i;
		292	AV *av = (AV *)req->sv1;
		293
		294	EXTEND (SP, AvFILL (av) + 1);
		295	for (i = 0; i <= AvFILL (av); ++i)
		296	PUSHs (*av_fetch (av, i, 0));
		297	}
		298	break;
		299
		300	case EIO_NOP:
		301	case EIO_BUSY:
		302	break;
		303
		304	case EIO_READLINK:
		305	if (req->result > 0)
		306	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		307	break;
		308
		309	case EIO_STAT:
		310	case EIO_LSTAT:
		311	case EIO_FSTAT:
		312	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		313	PL_laststatval = req->result;
		314	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		315	PUSHs (sv_2mortal (newSViv (req->result)));
		316	break;
		317
		318	case EIO_READ:
		319	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		320	*SvEND (req->sv2) = 0;
		321	PUSHs (sv_2mortal (newSViv (req->result)));
		322	break;
		323
		324	case EIO_DUP2:
		325	if (req->result > 0)
		326	req->result = 0;
		327	/* FALLTHROUGH */
		328
		329	default:
		330	PUSHs (sv_2mortal (newSViv (req->result)));
		331	break;
		332	}
		333
		334	errno = req->errorno;
		335
		336	PUTBACK;
		337	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		338	SPAGAIN;
		339
		340	FREETMPS;
		341	LEAVE;
		342
		343	PUTBACK;
		344	}
		345
		346	return !!SvTRUE (ERRSV);
		347	}
		348
		349	static void req_destroy (aio_req req)
		350	{
		351	if (req->self)
		352	{
		353	sv_unmagic (req->self, PERL_MAGIC_ext);
		354	SvREFCNT_dec (req->self);
		355	}
		356
		357	SvREFCNT_dec (req->sv1);
		358	SvREFCNT_dec (req->sv2);
		359	SvREFCNT_dec (req->callback);
		360
		361	Safefree (req);
		362	}
		363
		364	static void req_cancel_subs (aio_req grp)
		365	{
		366	aio_req sub;
		367
		368	if (grp->type != EIO_GROUP)
		369	return;
		370
		371	SvREFCNT_dec (grp->sv2);
		372	grp->sv2 = 0;
		373
		374	eio_grp_cancel (grp);
		375	}
		376
		377	#ifdef USE_SOCKETS_AS_HANDLES
		378	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		379	#else
		380	# define TO_SOCKET(x) (x)
		381	#endif
70		382
71	static void	383	static void
72	start_thread (void)	384	create_respipe (void)
73	{	385	{
74	sigset_t fullsigset, oldsigset;	386	int old_readfd = respipe [0];
75	pthread_t tid;
76	pthread_attr_t attr;
77		387
78	pthread_attr_init (&attr);	388	if (respipe [1] >= 0)
79	pthread_attr_setstacksize (&attr, STACKSIZE);	389	respipe_close (TO_SOCKET (respipe [1]));
80	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
81		390
82	sigfillset (&fullsigset);	391	#ifdef _WIN32
83	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	392	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		393	#else
		394	if (pipe (respipe))
		395	#endif
		396	croak ("unable to initialize result pipe");
84		397
85	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	398	if (old_readfd >= 0)
86	started++;
87
88	sigprocmask (SIG_SETMASK, &oldsigset, 0);
89	}
90
91	static void
92	send_req (aio_req req)
93	{
94	nreqs++;
95
96	pthread_mutex_lock (&reqlock);
97
98	req->next = 0;
99
100	if (reqe)
101	{	399	{
102	reqe->next = req;	400	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
103	reqe = req;	401	croak ("unable to initialize result pipe(2)");
		402
		403	respipe_close (respipe [0]);
		404	respipe [0] = old_readfd;
104	}	405	}
105	else
106	reqe = reqs = req;
107		406
108	pthread_cond_signal (&reqwait);	407	#ifdef _WIN32
109	pthread_mutex_unlock (&reqlock);	408	int arg = 1;
110	}	409	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		410	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		411	#else
		412	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		413	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		414	#endif
		415	croak ("unable to initialize result pipe(3)");
111		416
112	static void	417	respipe_osf [0] = TO_SOCKET (respipe [0]);
113	end_thread (void)	418	respipe_osf [1] = TO_SOCKET (respipe [1]);
114	{
115	aio_req req;
116	New (0, req, 1, aio_cb);
117	req->type = REQ_QUIT;
118
119	send_req (req);
120	}	419	}
121		420
122	static void	421	static void poll_wait (void)
123	read_write (pTHX_
124	int dowrite, int fd, off_t offset, size_t length,
125	SV *data, STRLEN dataoffset, SV *callback)
126	{	422	{
127	aio_req req;	423	fd_set rfd;
128	STRLEN svlen;
129	char *svptr = SvPV (data, svlen);
130		424
131	SvUPGRADE (data, SVt_PV);	425	while (eio_nreqs ())
132	SvPOK_on (data);
133
134	if (dataoffset < 0)
135	dataoffset += svlen;
136
137	if (dataoffset < 0 || dataoffset > svlen)
138	croak ("data offset outside of string");
139
140	if (dowrite)
141	{	426	{
142	/* write: check length and adjust. */	427	int size;
143	if (length < 0 || length + dataoffset > svlen)	428
144	length = svlen - dataoffset;	429	X_LOCK (reslock);
		430	size = res_queue.size;
		431	X_UNLOCK (reslock);
		432
		433	if (size)
		434	return;
		435
		436	etp_maybe_start_thread ();
		437
		438	FD_ZERO (&rfd);
		439	FD_SET (respipe [0], &rfd);
		440
		441	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
145	}	442	}
146	else
147	{
148	/* read: grow scalar as necessary */
149	svptr = SvGROW (data, length + dataoffset);
150	}
151
152	if (length < 0)
153	croak ("length must not be negative");
154
155	Newz (0, req, 1, aio_cb);
156
157	if (!req)
158	croak ("out of memory during aio_req allocation");
159
160	req->type = dowrite ? REQ_WRITE : REQ_READ;
161	req->fd = fd;
162	req->offset = offset;
163	req->length = length;
164	req->data = SvREFCNT_inc (data);
165	req->dataptr = (char *)svptr + dataoffset;
166	req->callback = SvREFCNT_inc (callback);
167
168	send_req (req);
169	}	443	}
170		444
171	static void	445	static int poll_cb (void)
172	poll_wait ()
173	{	446	{
174	if (!nreqs)
175	return;
176
177	fd_set rfd;
178	FD_ZERO(&rfd);
179	FD_SET(respipe [0], &rfd);
180
181	select (respipe [0] + 1, &rfd, 0, 0, 0);
182	}
183
184	static int
185	poll_cb (pTHX)
186	{
187	dSP;
188	int count = 0;
189	aio_req req;
190
191	{
192	/* read and signals sent by the worker threads */
193	char buf [32];
194	while (read (respipe [0], buf, 32) > 0)
195	;
196	}
197
198	for (;;)	447	for (;;)
199	{	448	{
200	pthread_mutex_lock (&reslock);	449	int res = eio_poll ();
201		450
202	req = ress;
203
204	if (ress)	451	if (res > 0)
205	{
206	ress = ress->next;
207	if (!ress) rese = 0;
208	}
209
210	pthread_mutex_unlock (&reslock);
211
212	if (!req)
213	break;	452	croak (0);
214		453
215	nreqs--;	454	if (!max_outstanding || max_outstanding > eio_nreqs ())
		455	return res;
216		456
217	if (req->type == REQ_QUIT)	457	poll_wait ();
218	started--;
219	else
220	{
221	int errorno = errno;
222	errno = req->errorno;
223
224	if (req->type == REQ_READ)
225	SvCUR_set (req->data, req->dataoffset
226	+ req->result > 0 ? req->result : 0);
227
228	if (req->data)
229	SvREFCNT_dec (req->data);
230
231	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
232	{
233	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
234	PL_laststatval = req->result;
235	PL_statcache = *(req->statdata);
236
237	Safefree (req->statdata);
238	}
239
240	PUSHMARK (SP);
241	XPUSHs (sv_2mortal (newSViv (req->result)));
242
243	if (req->type == REQ_OPEN)
244	{
245	/* convert fd to fh */
246	SV *fh;
247
248	PUTBACK;
249	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
250	SPAGAIN;
251
252	fh = POPs;
253
254	PUSHMARK (SP);
255	XPUSHs (fh);
256	}
257
258	PUTBACK;
259	call_sv (req->callback, G_VOID | G_EVAL);
260	SPAGAIN;
261
262	if (req->callback)
263	SvREFCNT_dec (req->callback);
264
265	errno = errorno;
266	count++;
267	}
268
269	Safefree (req);
270	}	458	}
271
272	return count;
273	}	459	}
274		460
		461	static void atfork_child (void)
		462	{
		463	create_respipe ();
		464	}
		465
275	static void *	466	static SV *
276	aio_proc (void *thr_arg)	467	get_cb (SV *cb_sv)
277	{	468	{
		469	HV *st;
		470	GV *gvp;
		471	CV *cv;
		472
		473	if (!SvOK (cb_sv))
		474	return 0;
		475
		476	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		477
		478	if (!cv)
		479	croak ("IO::AIO callback must be undef or a CODE reference");
		480
		481	return (SV *)cv;
		482	}
		483
		484	#define dREQ \
		485	SV *cb_cv; \
278	aio_req req;	486	aio_req req; \
279	int type;	487	int req_pri = next_pri; \
		488	next_pri = EIO_PRI_DEFAULT; \
		489	\
		490	cb_cv = get_cb (callback); \
		491	\
		492	Newz (0, req, 1, eio_req); \
		493	if (!req) \
		494	croak ("out of memory during eio_req allocation"); \
		495	\
		496	req->callback = SvREFCNT_inc (cb_cv); \
		497	req->pri = req_pri
280		498
281	do	499	#define REQ_SEND \
282	{	500	PUTBACK; \
283	pthread_mutex_lock (&reqlock);	501	req_submit (req); \
		502	SPAGAIN; \
		503	\
		504	if (GIMME_V != G_VOID) \
		505	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		506
		507	MODULE = IO::AIO PACKAGE = IO::AIO
284		508
285	for (;;)	509	PROTOTYPES: ENABLE
286	{
287	req = reqs;
288		510
289	if (reqs)	511	BOOT:
290	{	512	{
291	reqs = reqs->next;	513	stash = gv_stashpv ("IO::AIO", 1);
292	if (!reqs) reqe = 0;
293	}
294		514
295	if (req)	515	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
296	break;	516	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
297		517	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
298	pthread_cond_wait (&reqwait, &reqlock);	518	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
299	}	519	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
300		520	#ifndef _WIN32
301	pthread_mutex_unlock (&reqlock);	521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
302
303	errno = 0; /* strictly unnecessary */
304
305	type = req->type;
306
307	switch (type)
308	{
309	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
310	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
311	#if SYS_readahead
312	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
313	#else
314	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
315	#endif	522	#endif
316		523
317	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	524	create_respipe ();
318	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
319	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
320		525
321	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	526	if (eio_init (want_poll, done_poll) < 0)
322	case REQ_CLOSE: req->result = close (req->fd); break;	527	croak ("IO::AIO: unable to initialise eio library");
323	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
324		528
325	case REQ_FSYNC: req->result = fsync (req->fd); break;	529	/* atfork child called in fifo order, so before eio's handler */
326	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	530	X_THREAD_ATFORK (0, 0, atfork_child);
327
328	case REQ_QUIT:
329	break;
330
331	default:
332	req->result = ENOSYS;
333	break;
334	}
335
336	req->errorno = errno;
337
338	pthread_mutex_lock (&reslock);
339
340	req->next = 0;
341
342	if (rese)
343	{
344	rese->next = req;
345	rese = req;
346	}
347	else
348	{
349	rese = ress = req;
350
351	/* write a dummy byte to the pipe so fh becomes ready */
352	write (respipe [1], &respipe, 1);
353	}
354
355	pthread_mutex_unlock (&reslock);
356	}
357	while (type != REQ_QUIT);
358
359	return 0;
360	}	531	}
361		532
362	MODULE = IO::AIO PACKAGE = IO::AIO
363
364	BOOT:
365	{
366	if (pipe (respipe))
367	croak ("unable to initialize result pipe");
368
369	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
370	croak ("cannot set result pipe to nonblocking mode");
371
372	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
373	croak ("cannot set result pipe to nonblocking mode");
374	}
375
376	void	533	void
377	min_parallel(nthreads)	534	max_poll_reqs (int nreqs)
378	int nthreads
379	PROTOTYPE: $	535	PROTOTYPE: $
380	CODE:	536	CODE:
381	while (nthreads > started)	537	eio_set_max_poll_reqs (nreqs);
382	start_thread ();
383		538
384	void	539	void
385	max_parallel(nthreads)	540	max_poll_time (double nseconds)
386	int nthreads
387	PROTOTYPE: $	541	PROTOTYPE: $
388	CODE:	542	CODE:
		543	eio_set_max_poll_time (nseconds);
		544
		545	void
		546	min_parallel (int nthreads)
		547	PROTOTYPE: $
		548	CODE:
		549	eio_set_min_parallel (nthreads);
		550
		551	void
		552	max_parallel (int nthreads)
		553	PROTOTYPE: $
		554	CODE:
		555	eio_set_max_parallel (nthreads);
		556
		557	void
		558	max_idle (int nthreads)
		559	PROTOTYPE: $
		560	CODE:
		561	eio_set_max_idle (nthreads);
		562
		563	void
		564	max_outstanding (int maxreqs)
		565	PROTOTYPE: $
		566	CODE:
		567	max_outstanding = maxreqs;
		568
		569	void
		570	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		571	PROTOTYPE: $$$;$
		572	PPCODE:
389	{	573	{
390	int cur = started;	574	dREQ;
391	while (cur > nthreads)	575
392	{	576	req->type = EIO_OPEN;
393	end_thread ();	577	req->sv1 = newSVsv (pathname);
		578	req->ptr1 = SvPVbyte_nolen (req->sv1);
		579	req->int1 = flags;
		580	req->int2 = mode;
		581
		582	REQ_SEND;
		583	}
		584
		585	void
		586	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		587	PROTOTYPE: $;$
		588	ALIAS:
		589	aio_fsync = EIO_FSYNC
		590	aio_fdatasync = EIO_FDATASYNC
		591	PPCODE:
		592	{
		593	dREQ;
		594
		595	req->type = ix;
		596	req->sv1 = newSVsv (fh);
		597	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		598
		599	REQ_SEND (req);
		600	}
		601
		602	void
		603	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		604	PROTOTYPE: $;$
		605	PPCODE:
		606	{
		607	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		608	dREQ;
		609
		610	if (close_pipe < 0)
		611	{
		612	int pipefd [2];
		613
		614	if (pipe (pipefd) < 0
		615	|| close (pipefd [1]) < 0
		616	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		617	abort (); /*D*/
		618
		619	close_pipe = pipefd [0];
		620	}
		621
		622	req->type = EIO_DUP2;
		623	req->int1 = close_pipe;
		624	req->sv2 = newSVsv (fh);
		625	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		626
		627	REQ_SEND (req);
		628	}
		629
		630	void
		631	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		632	ALIAS:
		633	aio_read = EIO_READ
		634	aio_write = EIO_WRITE
		635	PROTOTYPE: $$$$$;$
		636	PPCODE:
		637	{
		638	STRLEN svlen;
		639	char *svptr = SvPVbyte (data, svlen);
		640	UV len = SvUV (length);
		641
		642	SvUPGRADE (data, SVt_PV);
		643	SvPOK_on (data);
		644
		645	if (dataoffset < 0)
		646	dataoffset += svlen;
		647
		648	if (dataoffset < 0 || dataoffset > svlen)
		649	croak ("dataoffset outside of data scalar");
		650
		651	if (ix == EIO_WRITE)
		652	{
		653	/* write: check length and adjust. */
		654	if (!SvOK (length) || len + dataoffset > svlen)
		655	len = svlen - dataoffset;
		656	}
		657	else
		658	{
		659	/* read: grow scalar as necessary */
		660	svptr = SvGROW (data, len + dataoffset + 1);
		661	}
		662
		663	if (len < 0)
		664	croak ("length must not be negative");
		665
		666	{
		667	dREQ;
		668
		669	req->type = ix;
		670	req->sv1 = newSVsv (fh);
		671	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		672	: IoOFP (sv_2io (fh)));
		673	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		674	req->size = len;
		675	req->sv2 = SvREFCNT_inc_NN (data);
		676	req->ptr2 = (char *)svptr + dataoffset;
		677	req->stroffset = dataoffset;
		678
		679	if (!SvREADONLY (data))
394	cur--;	680	{
		681	SvREADONLY_on (data);
		682	req->flags |= FLAG_SV2_RO_OFF;
395	}	683	}
396		684
397	while (started > nthreads)	685	REQ_SEND;
		686	}
		687	}
		688
		689	void
		690	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		691	PROTOTYPE: $$;$
		692	PPCODE:
		693	{
		694	SV *data;
		695	dREQ;
		696
		697	req->type = EIO_READLINK;
		698	req->sv1 = newSVsv (path);
		699	req->ptr1 = SvPVbyte_nolen (req->sv1);
		700
		701	REQ_SEND;
		702	}
		703
		704	void
		705	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		706	PROTOTYPE: $$$$;$
		707	PPCODE:
		708	{
		709	dREQ;
		710
		711	req->type = EIO_SENDFILE;
		712	req->sv1 = newSVsv (out_fh);
		713	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		714	req->sv2 = newSVsv (in_fh);
		715	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		716	req->offs = SvVAL64 (in_offset);
		717	req->size = length;
		718
		719	REQ_SEND;
		720	}
		721
		722	void
		723	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		724	PROTOTYPE: $$$;$
		725	PPCODE:
		726	{
		727	dREQ;
		728
		729	req->type = EIO_READAHEAD;
		730	req->sv1 = newSVsv (fh);
		731	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		732	req->offs = SvVAL64 (offset);
		733	req->size = length;
		734
		735	REQ_SEND;
		736	}
		737
		738	void
		739	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		740	ALIAS:
		741	aio_stat = EIO_STAT
		742	aio_lstat = EIO_LSTAT
		743	PPCODE:
		744	{
		745	dREQ;
		746
		747	req->sv1 = newSVsv (fh_or_path);
		748
		749	if (SvPOK (req->sv1))
		750	{
		751	req->type = ix;
		752	req->ptr1 = SvPVbyte_nolen (req->sv1);
		753	}
		754	else
		755	{
		756	req->type = EIO_FSTAT;
		757	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		758	}
		759
		760	REQ_SEND;
		761	}
		762
		763	void
		764	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		765	PPCODE:
		766	{
		767	dREQ;
		768
		769	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		770	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		771	req->sv1 = newSVsv (fh_or_path);
		772
		773	if (SvPOK (req->sv1))
		774	{
		775	req->type = EIO_UTIME;
		776	req->ptr1 = SvPVbyte_nolen (req->sv1);
		777	}
		778	else
		779	{
		780	req->type = EIO_FUTIME;
		781	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		782	}
		783
		784	REQ_SEND;
		785	}
		786
		787	void
		788	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		789	PPCODE:
		790	{
		791	dREQ;
		792
		793	req->sv1 = newSVsv (fh_or_path);
		794	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		795
		796	if (SvPOK (req->sv1))
		797	{
		798	req->type = EIO_TRUNCATE;
		799	req->ptr1 = SvPVbyte_nolen (req->sv1);
		800	}
		801	else
		802	{
		803	req->type = EIO_FTRUNCATE;
		804	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		805	}
		806
		807	REQ_SEND;
		808	}
		809
		810	void
		811	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		812	ALIAS:
		813	aio_chmod = EIO_CHMOD
		814	aio_mkdir = EIO_MKDIR
		815	PPCODE:
		816	{
		817	dREQ;
		818
		819	req->int2 = mode;
		820	req->sv1 = newSVsv (fh_or_path);
		821
		822	if (SvPOK (req->sv1))
		823	{
		824	req->type = ix;
		825	req->ptr1 = SvPVbyte_nolen (req->sv1);
		826	}
		827	else
		828	{
		829	req->type = EIO_FCHMOD;
		830	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		831	}
		832
		833	REQ_SEND;
		834	}
		835
		836	void
		837	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		838	PPCODE:
		839	{
		840	dREQ;
		841
		842	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		843	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		844	req->sv1 = newSVsv (fh_or_path);
		845
		846	if (SvPOK (req->sv1))
		847	{
		848	req->type = EIO_CHOWN;
		849	req->ptr1 = SvPVbyte_nolen (req->sv1);
		850	}
		851	else
		852	{
		853	req->type = EIO_FCHOWN;
		854	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		855	}
		856
		857	REQ_SEND;
		858	}
		859
		860	void
		861	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		862	ALIAS:
		863	aio_unlink = EIO_UNLINK
		864	aio_rmdir = EIO_RMDIR
		865	aio_readdir = EIO_READDIR
		866	PPCODE:
		867	{
		868	dREQ;
		869
		870	req->type = ix;
		871	req->sv1 = newSVsv (pathname);
		872	req->ptr1 = SvPVbyte_nolen (req->sv1);
		873
		874	REQ_SEND;
		875	}
		876
		877	void
		878	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		879	ALIAS:
		880	aio_link = EIO_LINK
		881	aio_symlink = EIO_SYMLINK
		882	aio_rename = EIO_RENAME
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->type = ix;
		888	req->sv1 = newSVsv (oldpath);
		889	req->ptr1 = SvPVbyte_nolen (req->sv1);
		890	req->sv2 = newSVsv (newpath);
		891	req->ptr2 = SvPVbyte_nolen (req->sv2);
		892
		893	REQ_SEND;
		894	}
		895
		896	void
		897	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		898	PPCODE:
		899	{
		900	dREQ;
		901
		902	req->type = EIO_MKNOD;
		903	req->sv1 = newSVsv (pathname);
		904	req->ptr1 = SvPVbyte_nolen (req->sv1);
		905	req->int2 = (mode_t)mode;
		906	req->offs = dev;
		907
		908	REQ_SEND;
		909	}
		910
		911	void
		912	aio_busy (double delay, SV *callback=&PL_sv_undef)
		913	PPCODE:
		914	{
		915	dREQ;
		916
		917	req->type = EIO_BUSY;
		918	req->nv1 = delay < 0. ? 0. : delay;
		919
		920	REQ_SEND;
		921	}
		922
		923	void
		924	aio_group (SV *callback=&PL_sv_undef)
		925	PROTOTYPE: ;$
		926	PPCODE:
		927	{
		928	dREQ;
		929
		930	req->type = EIO_GROUP;
		931
		932	req_submit (req);
		933	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		934	}
		935
		936	void
		937	aio_nop (SV *callback=&PL_sv_undef)
		938	ALIAS:
		939	aio_nop = EIO_NOP
		940	aio_sync = EIO_SYNC
		941	PPCODE:
		942	{
		943	dREQ;
		944
		945	req->type = ix;
		946
		947	REQ_SEND;
		948	}
		949
		950	int
		951	aioreq_pri (int pri = 0)
		952	PROTOTYPE: ;$
		953	CODE:
		954	RETVAL = next_pri;
		955	if (items > 0)
		956	{
		957	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		958	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		959	next_pri = pri;
		960	}
		961	OUTPUT:
		962	RETVAL
		963
		964	void
		965	aioreq_nice (int nice = 0)
		966	CODE:
		967	nice = next_pri - nice;
		968	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		969	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		970	next_pri = nice;
		971
		972	void
		973	flush ()
		974	PROTOTYPE:
		975	CODE:
		976	while (eio_nreqs ())
398	{	977	{
399	poll_wait ();	978	poll_wait ();
400	poll_cb (aTHX);	979	poll_cb ();
401	}
402	}
403
404	void
405	aio_open(pathname,flags,mode,callback)
406	SV * pathname
407	int flags
408	int mode
409	SV * callback
410	PROTOTYPE: $$$$
411	CODE:
412	{
413	aio_req req;
414
415	Newz (0, req, 1, aio_cb);
416
417	if (!req)
418	croak ("out of memory during aio_req allocation");
419
420	req->type = REQ_OPEN;
421	req->data = newSVsv (pathname);
422	req->dataptr = SvPV_nolen (req->data);
423	req->fd = flags;
424	req->mode = mode;
425	req->callback = SvREFCNT_inc (callback);
426
427	send_req (req);
428	}
429
430	void
431	aio_close(fh,callback)
432	InputStream fh
433	SV * callback
434	PROTOTYPE: $$
435	ALIAS:
436	aio_close = REQ_CLOSE
437	aio_fsync = REQ_FSYNC
438	aio_fdatasync = REQ_FDATASYNC
439	CODE:
440	{
441	aio_req req;
442
443	Newz (0, req, 1, aio_cb);
444
445	if (!req)
446	croak ("out of memory during aio_req allocation");
447
448	req->type = ix;
449	req->fd = PerlIO_fileno (fh);
450	req->callback = SvREFCNT_inc (callback);
451
452	send_req (req);
453	}
454
455	void
456	aio_read(fh,offset,length,data,dataoffset,callback)
457	InputStream fh
458	UV offset
459	IV length
460	SV * data
461	IV dataoffset
462	SV * callback
463	PROTOTYPE: $$$$$$
464	CODE:
465	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
466
467	void
468	aio_write(fh,offset,length,data,dataoffset,callback)
469	OutputStream fh
470	UV offset
471	IV length
472	SV * data
473	IV dataoffset
474	SV * callback
475	PROTOTYPE: $$$$$$
476	CODE:
477	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
478
479	void
480	aio_readahead(fh,offset,length,callback)
481	InputStream fh
482	UV offset
483	IV length
484	SV * callback
485	PROTOTYPE: $$$$
486	CODE:
487	{
488	aio_req req;
489
490	if (length < 0)
491	croak ("length must not be negative");
492
493	Newz (0, req, 1, aio_cb);
494
495	if (!req)
496	croak ("out of memory during aio_req allocation");
497
498	req->type = REQ_READAHEAD;
499	req->fd = PerlIO_fileno (fh);
500	req->offset = offset;
501	req->length = length;
502	req->callback = SvREFCNT_inc (callback);
503
504	send_req (req);
505	}
506
507	void
508	aio_stat(fh_or_path,callback)
509	SV * fh_or_path
510	SV * callback
511	PROTOTYPE: $$
512	ALIAS:
513	aio_lstat = 1
514	CODE:
515	{
516	aio_req req;
517
518	Newz (0, req, 1, aio_cb);
519
520	if (!req)
521	croak ("out of memory during aio_req allocation");
522
523	New (0, req->statdata, 1, Stat_t);
524
525	if (!req->statdata)
526	croak ("out of memory during aio_req->statdata allocation");
527
528	if (SvPOK (fh_or_path))
529	{	980	}
530	req->type = ix ? REQ_LSTAT : REQ_STAT;
531	req->data = newSVsv (fh_or_path);
532	req->dataptr = SvPV_nolen (req->data);
533	}
534	else
535	{
536	req->type = REQ_FSTAT;
537	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
538	}
539		981
540	req->callback = SvREFCNT_inc (callback);	982	int
541		983	poll()
542	send_req (req);
543	}
544
545	void
546	aio_unlink(pathname,callback)
547	SV * pathname
548	SV * callback
549	PROTOTYPE: $$	984	PROTOTYPE:
550	CODE:	985	CODE:
551	{	986	poll_wait ();
552	aio_req req;	987	RETVAL = poll_cb ();
553		988	OUTPUT:
554	Newz (0, req, 1, aio_cb);	989	RETVAL
555
556	if (!req)
557	croak ("out of memory during aio_req allocation");
558
559	req->type = REQ_UNLINK;
560	req->data = newSVsv (pathname);
561	req->dataptr = SvPV_nolen (req->data);
562	req->callback = SvREFCNT_inc (callback);
563
564	send_req (req);
565	}
566		990
567	int	991	int
568	poll_fileno()	992	poll_fileno()
569	PROTOTYPE:	993	PROTOTYPE:
570	CODE:	994	CODE:
…		…
574		998
575	int	999	int
576	poll_cb(...)	1000	poll_cb(...)
577	PROTOTYPE:	1001	PROTOTYPE:
578	CODE:	1002	CODE:
579	RETVAL = poll_cb (aTHX);	1003	RETVAL = poll_cb ();
580	OUTPUT:	1004	OUTPUT:
581	RETVAL	1005	RETVAL
582		1006
583	void	1007	void
584	poll_wait()	1008	poll_wait()
585	PROTOTYPE:	1009	PROTOTYPE:
586	CODE:	1010	CODE:
587	if (nreqs)
588	poll_wait ();	1011	poll_wait ();
589		1012
590	int	1013	int
591	nreqs()	1014	nreqs()
592	PROTOTYPE:	1015	PROTOTYPE:
593	CODE:	1016	CODE:
594	RETVAL = nreqs;	1017	RETVAL = eio_nreqs ();
595	OUTPUT:	1018	OUTPUT:
596	RETVAL	1019	RETVAL
597		1020
		1021	int
		1022	nready()
		1023	PROTOTYPE:
		1024	CODE:
		1025	RETVAL = eio_nready ();
		1026	OUTPUT:
		1027	RETVAL
		1028
		1029	int
		1030	npending()
		1031	PROTOTYPE:
		1032	CODE:
		1033	RETVAL = eio_npending ();
		1034	OUTPUT:
		1035	RETVAL
		1036
		1037	int
		1038	nthreads()
		1039	PROTOTYPE:
		1040	CODE:
		1041	RETVAL = eio_nthreads ();
		1042	OUTPUT:
		1043	RETVAL
		1044
		1045	void _on_next_submit (SV *cb)
		1046	CODE:
		1047	SvREFCNT_dec (on_next_submit);
		1048	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1049
		1050	PROTOTYPES: DISABLE
		1051
		1052	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1053
		1054	void
		1055	cancel (aio_req_ornot req)
		1056	CODE:
		1057	eio_cancel (req);
		1058
		1059	void
		1060	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1061	PPCODE:
		1062	{
		1063	if (GIMME_V != G_VOID)
		1064	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1065
		1066	if (items > 1)
		1067	{
		1068	SV *cb_cv = get_cb (callback);
		1069
		1070	SvREFCNT_dec (req->callback);
		1071	req->callback = SvREFCNT_inc (cb_cv);
		1072	}
		1073	}
		1074
		1075	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1076
		1077	void
		1078	add (aio_req grp, ...)
		1079	PPCODE:
		1080	{
		1081	int i;
		1082
		1083	if (grp->int1 == 2)
		1084	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1085
		1086	for (i = 1; i < items; ++i )
		1087	{
		1088	aio_req req;
		1089
		1090	if (GIMME_V != G_VOID)
		1091	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1092
		1093	req = SvAIO_REQ (ST (i));
		1094
		1095	if (req)
		1096	eio_grp_add (grp, req);
		1097	}
		1098	}
		1099
		1100	void
		1101	cancel_subs (aio_req_ornot req)
		1102	CODE:
		1103	req_cancel_subs (req);
		1104
		1105	void
		1106	result (aio_req grp, ...)
		1107	CODE:
		1108	{
		1109	int i;
		1110	AV *av;
		1111
		1112	grp->errorno = errno;
		1113
		1114	av = newAV ();
		1115
		1116	for (i = 1; i < items; ++i )
		1117	av_push (av, newSVsv (ST (i)));
		1118
		1119	SvREFCNT_dec (grp->sv1);
		1120	grp->sv1 = (SV *)av;
		1121	}
		1122
		1123	void
		1124	errno (aio_req grp, int errorno = errno)
		1125	CODE:
		1126	grp->errorno = errorno;
		1127
		1128	void
		1129	limit (aio_req grp, int limit)
		1130	CODE:
		1131	eio_grp_limit (grp, limit);
		1132
		1133	void
		1134	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1135	CODE:
		1136	{
		1137	SvREFCNT_dec (grp->sv2);
		1138	grp->sv2 = newSVsv (callback);
		1139
		1140	if (grp->int2 <= 0)
		1141	grp->int2 = 2;
		1142
		1143	eio_grp_limit (grp, grp->int2);
		1144	}
		1145

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