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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 1.132 by root, Mon Oct 13 10:38:17 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 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 *volatile 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 respipe [2];	130	static int max_outstanding;
61		131
62	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	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		133
66	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
67	static volatile aio_req ress, rese; /* queue start, queue end */	135	static void req_cancel (aio_req req);
68		136
69	static void *aio_proc(void *arg);	137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
		150
		151	/* must be called at most once */
		152	static SV *req_sv (aio_req req, const char *klass)
		153	{
		154	if (!req->self)
		155	{
		156	req->self = (SV *)newHV ();
		157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		158	}
		159
		160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		161	}
		162
		163	static aio_req SvAIO_REQ (SV *sv)
		164	{
		165	MAGIC *mg;
		166
		167	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		168	croak ("object of class " AIO_REQ_KLASS " expected");
		169
		170	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		171
		172	return mg ? (aio_req)mg->mg_ptr : 0;
		173	}
		174
		175	static void aio_grp_feed (aio_req grp)
		176	{
		177	if (grp->sv2 && SvOK (grp->sv2))
		178	{
		179	dSP;
		180
		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;
		190	}
		191	}
		192
		193	static void req_submit (eio_req *req)
		194	{
		195	eio_submit (req);
		196
		197	if (expect_false (on_next_submit))
		198	{
		199	dSP;
		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);
		207	}
		208	}
		209
		210	static int req_invoke (eio_req *req)
		211	{
		212	dSP;
		213
		214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
		218	{
		219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
		223
		224	switch (req->type)
		225	{
		226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
		229
		230	if (req->result >= 0)
		231	{
		232	int i;
		233	char *buf = req->ptr2;
		234	AV *av = newAV ();
		235
		236	av_extend (av, req->result - 1);
		237
		238	for (i = 0; i < req->result; ++i)
		239	{
		240	SV *sv = newSVpv (buf, 0);
		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:
		299	case EIO_BUSY:
		300	break;
		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	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		318	*SvEND (req->sv2) = 0;
		319	PUSHs (sv_2mortal (newSViv (req->result)));
		320	break;
		321
		322	case EIO_DUP2:
		323	if (req->result > 0)
		324	req->result = 0;
		325	/* FALLTHROUGH */
		326
		327	default:
		328	PUSHs (sv_2mortal (newSViv (req->result)));
		329	break;
		330	}
		331
		332	errno = req->errorno;
		333
		334	PUTBACK;
		335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		336	SPAGAIN;
		337
		338	FREETMPS;
		339	LEAVE;
		340
		341	PUTBACK;
		342	}
		343
		344	return !!SvTRUE (ERRSV);
		345	}
		346
		347	static void req_destroy (aio_req req)
		348	{
		349	if (req->self)
		350	{
		351	sv_unmagic (req->self, PERL_MAGIC_ext);
		352	SvREFCNT_dec (req->self);
		353	}
		354
		355	SvREFCNT_dec (req->sv1);
		356	SvREFCNT_dec (req->sv2);
		357	SvREFCNT_dec (req->callback);
		358
		359	Safefree (req);
		360	}
		361
		362	static void req_cancel_subs (aio_req grp)
		363	{
		364	aio_req sub;
		365
		366	if (grp->type != EIO_GROUP)
		367	return;
		368
		369	SvREFCNT_dec (grp->sv2);
		370	grp->sv2 = 0;
		371
		372	eio_grp_cancel (grp);
		373	}
		374
		375	#ifdef USE_SOCKETS_AS_HANDLES
		376	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		377	#else
		378	# define TO_SOCKET(x) (x)
		379	#endif
70		380
71	static void	381	static void
72	start_thread (void)	382	create_respipe (void)
73	{	383	{
74	sigset_t fullsigset, oldsigset;	384	int old_readfd = respipe [0];
75	pthread_t tid;
76	pthread_attr_t attr;
77		385
78	pthread_attr_init (&attr);	386	if (respipe [1] >= 0)
79	pthread_attr_setstacksize (&attr, STACKSIZE);	387	respipe_close (TO_SOCKET (respipe [1]));
80	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
81		388
82	sigfillset (&fullsigset);	389	#ifdef _WIN32
83	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	390	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		391	#else
		392	if (pipe (respipe))
		393	#endif
		394	croak ("unable to initialize result pipe");
84		395
85	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	396	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	{	397	{
102	reqe->next = req;	398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
103	reqe = req;	399	croak ("unable to initialize result pipe(2)");
		400
		401	respipe_close (respipe [0]);
		402	respipe [0] = old_readfd;
104	}	403	}
105	else
106	reqe = reqs = req;
107		404
108	pthread_cond_signal (&reqwait);	405	#ifdef _WIN32
109	pthread_mutex_unlock (&reqlock);	406	int arg = 1;
110	}	407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		409	#else
		410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
111		414
112	static void	415	respipe_osf [0] = TO_SOCKET (respipe [0]);
113	end_thread (void)	416	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	}	417	}
121		418
122	static void	419	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	{	420	{
127	aio_req req;	421	fd_set rfd;
128	STRLEN svlen;
129	char *svptr = SvPV (data, svlen);
130		422
131	SvUPGRADE (data, SVt_PV);	423	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	{	424	{
142	/* write: check length and adjust. */	425	int size;
143	if (length < 0 || length + dataoffset > svlen)	426
144	length = svlen - dataoffset;	427	X_LOCK (reslock);
		428	size = res_queue.size;
		429	X_UNLOCK (reslock);
		430
		431	if (size)
		432	return;
		433
		434	etp_maybe_start_thread ();
		435
		436	FD_ZERO (&rfd);
		437	FD_SET (respipe [0], &rfd);
		438
		439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
145	}	440	}
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	}	441	}
170		442
171	static void	443	static int poll_cb (void)
172	poll_wait ()
173	{	444	{
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 (;;)	445	for (;;)
199	{	446	{
200	pthread_mutex_lock (&reslock);	447	int res = eio_poll ();
201		448
202	req = ress;
203
204	if (ress)	449	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;	450	croak (0);
214		451
215	nreqs--;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
216		454
217	if (req->type == REQ_QUIT)	455	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	}	456	}
271
272	return count;
273	}	457	}
274		458
		459	static void atfork_child (void)
		460	{
		461	create_respipe ();
		462	}
		463
275	static void *	464	static SV *
276	aio_proc (void *thr_arg)	465	get_cb (SV *cb_sv)
277	{	466	{
		467	HV *st;
		468	GV *gvp;
		469	CV *cv;
		470
		471	if (!SvOK (cb_sv))
		472	return 0;
		473
		474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		475
		476	if (!cv)
		477	croak ("IO::AIO callback must be undef or a CODE reference");
		478
		479	return (SV *)cv;
		480	}
		481
		482	#define dREQ \
		483	SV *cb_cv; \
278	aio_req req;	484	aio_req req; \
279	int type;	485	int req_pri = next_pri; \
		486	next_pri = EIO_PRI_DEFAULT; \
		487	\
		488	cb_cv = get_cb (callback); \
		489	\
		490	Newz (0, req, 1, eio_req); \
		491	if (!req) \
		492	croak ("out of memory during eio_req allocation"); \
		493	\
		494	req->callback = SvREFCNT_inc (cb_cv); \
		495	req->pri = req_pri
280		496
281	do	497	#define REQ_SEND \
282	{	498	PUTBACK; \
283	pthread_mutex_lock (&reqlock);	499	req_submit (req); \
		500	SPAGAIN; \
		501	\
		502	if (GIMME_V != G_VOID) \
		503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		504
		505	MODULE = IO::AIO PACKAGE = IO::AIO
284		506
285	for (;;)	507	PROTOTYPES: ENABLE
286	{
287	req = reqs;
288		508
289	if (reqs)	509	BOOT:
290	{	510	{
291	reqs = reqs->next;	511	stash = gv_stashpv ("IO::AIO", 1);
292	if (!reqs) reqe = 0;
293	}
294		512
295	if (req)	513	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
296	break;	514	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
297		515	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
298	pthread_cond_wait (&reqwait, &reqlock);	516	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
299	}	517	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
300		518	#ifndef _WIN32
301	pthread_mutex_unlock (&reqlock);	519	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	520	#endif
316		521
317	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	522	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		523
321	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	524	if (eio_init (want_poll, done_poll) < 0)
322	case REQ_CLOSE: req->result = close (req->fd); break;	525	croak ("IO::AIO: unable to initialise eio library");
323	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
324		526
325	case REQ_FSYNC: req->result = fsync (req->fd); break;	527	/* atfork child called in fifo order, so before eio's handler */
326	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	528	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	}	529	}
361		530
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	531	void
377	min_parallel(nthreads)	532	max_poll_reqs (int nreqs)
378	int nthreads
379	PROTOTYPE: $	533	PROTOTYPE: $
380	CODE:	534	CODE:
381	while (nthreads > started)	535	eio_set_max_poll_reqs (nreqs);
382	start_thread ();
383		536
384	void	537	void
385	max_parallel(nthreads)	538	max_poll_time (double nseconds)
386	int nthreads
387	PROTOTYPE: $	539	PROTOTYPE: $
388	CODE:	540	CODE:
		541	eio_set_max_poll_time (nseconds);
		542
		543	void
		544	min_parallel (int nthreads)
		545	PROTOTYPE: $
		546	CODE:
		547	eio_set_min_parallel (nthreads);
		548
		549	void
		550	max_parallel (int nthreads)
		551	PROTOTYPE: $
		552	CODE:
		553	eio_set_max_parallel (nthreads);
		554
		555	void
		556	max_idle (int nthreads)
		557	PROTOTYPE: $
		558	CODE:
		559	eio_set_max_idle (nthreads);
		560
		561	void
		562	max_outstanding (int maxreqs)
		563	PROTOTYPE: $
		564	CODE:
		565	max_outstanding = maxreqs;
		566
		567	void
		568	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		569	PROTOTYPE: $$$;$
		570	PPCODE:
389	{	571	{
390	int cur = started;	572	dREQ;
391	while (cur > nthreads)	573
392	{	574	req->type = EIO_OPEN;
393	end_thread ();	575	req->sv1 = newSVsv (pathname);
		576	req->ptr1 = SvPVbyte_nolen (req->sv1);
		577	req->int1 = flags;
		578	req->int2 = mode;
		579
		580	REQ_SEND;
		581	}
		582
		583	void
		584	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		585	PROTOTYPE: $;$
		586	ALIAS:
		587	aio_fsync = EIO_FSYNC
		588	aio_fdatasync = EIO_FDATASYNC
		589	PPCODE:
		590	{
		591	dREQ;
		592
		593	req->type = ix;
		594	req->sv1 = newSVsv (fh);
		595	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		596
		597	REQ_SEND (req);
		598	}
		599
		600	void
		601	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		602	PROTOTYPE: $;$
		603	PPCODE:
		604	{
		605	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		606	dREQ;
		607
		608	if (close_pipe < 0)
		609	{
		610	int pipefd [2];
		611
		612	if (pipe (pipefd) < 0
		613	|| close (pipefd [1]) < 0
		614	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		615	abort (); /*D*/
		616
		617	close_pipe = pipefd [0];
		618	}
		619
		620	req->type = EIO_DUP2;
		621	req->int1 = close_pipe;
		622	req->sv2 = newSVsv (fh);
		623	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		624
		625	REQ_SEND (req);
		626	}
		627
		628	void
		629	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		630	ALIAS:
		631	aio_read = EIO_READ
		632	aio_write = EIO_WRITE
		633	PROTOTYPE: $$$$$;$
		634	PPCODE:
		635	{
		636	STRLEN svlen;
		637	char *svptr = SvPVbyte (data, svlen);
		638	UV len = SvUV (length);
		639
		640	SvUPGRADE (data, SVt_PV);
		641	SvPOK_on (data);
		642
		643	if (dataoffset < 0)
		644	dataoffset += svlen;
		645
		646	if (dataoffset < 0 || dataoffset > svlen)
		647	croak ("dataoffset outside of data scalar");
		648
		649	if (ix == EIO_WRITE)
		650	{
		651	/* write: check length and adjust. */
		652	if (!SvOK (length) || len + dataoffset > svlen)
		653	len = svlen - dataoffset;
		654	}
		655	else
		656	{
		657	/* read: grow scalar as necessary */
		658	svptr = SvGROW (data, len + dataoffset + 1);
		659	}
		660
		661	if (len < 0)
		662	croak ("length must not be negative");
		663
		664	{
		665	dREQ;
		666
		667	req->type = ix;
		668	req->sv1 = newSVsv (fh);
		669	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		670	: IoOFP (sv_2io (fh)));
		671	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		672	req->size = len;
		673	req->sv2 = SvREFCNT_inc (data);
		674	req->ptr2 = (char *)svptr + dataoffset;
		675	req->stroffset = dataoffset;
		676
		677	if (!SvREADONLY (data))
394	cur--;	678	{
		679	SvREADONLY_on (data);
		680	req->flags |= FLAG_SV2_RO_OFF;
395	}	681	}
396		682
397	while (started > nthreads)	683	REQ_SEND;
		684	}
		685	}
		686
		687	void
		688	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		689	PROTOTYPE: $$;$
		690	PPCODE:
		691	{
		692	SV *data;
		693	dREQ;
		694
		695	req->type = EIO_READLINK;
		696	req->sv1 = newSVsv (path);
		697	req->ptr1 = SvPVbyte_nolen (req->sv1);
		698
		699	REQ_SEND;
		700	}
		701
		702	void
		703	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		704	PROTOTYPE: $$$$;$
		705	PPCODE:
		706	{
		707	dREQ;
		708
		709	req->type = EIO_SENDFILE;
		710	req->sv1 = newSVsv (out_fh);
		711	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		712	req->sv2 = newSVsv (in_fh);
		713	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		714	req->offs = SvVAL64 (in_offset);
		715	req->size = length;
		716
		717	REQ_SEND;
		718	}
		719
		720	void
		721	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		722	PROTOTYPE: $$$;$
		723	PPCODE:
		724	{
		725	dREQ;
		726
		727	req->type = EIO_READAHEAD;
		728	req->sv1 = newSVsv (fh);
		729	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		730	req->offs = SvVAL64 (offset);
		731	req->size = length;
		732
		733	REQ_SEND;
		734	}
		735
		736	void
		737	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		738	ALIAS:
		739	aio_stat = EIO_STAT
		740	aio_lstat = EIO_LSTAT
		741	PPCODE:
		742	{
		743	dREQ;
		744
		745	req->sv1 = newSVsv (fh_or_path);
		746
		747	if (SvPOK (req->sv1))
		748	{
		749	req->type = ix;
		750	req->ptr1 = SvPVbyte_nolen (req->sv1);
		751	}
		752	else
		753	{
		754	req->type = EIO_FSTAT;
		755	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		756	}
		757
		758	REQ_SEND;
		759	}
		760
		761	void
		762	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		763	PPCODE:
		764	{
		765	dREQ;
		766
		767	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		768	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		769	req->sv1 = newSVsv (fh_or_path);
		770
		771	if (SvPOK (req->sv1))
		772	{
		773	req->type = EIO_UTIME;
		774	req->ptr1 = SvPVbyte_nolen (req->sv1);
		775	}
		776	else
		777	{
		778	req->type = EIO_FUTIME;
		779	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		780	}
		781
		782	REQ_SEND;
		783	}
		784
		785	void
		786	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		787	PPCODE:
		788	{
		789	dREQ;
		790
		791	req->sv1 = newSVsv (fh_or_path);
		792	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		793
		794	if (SvPOK (req->sv1))
		795	{
		796	req->type = EIO_TRUNCATE;
		797	req->ptr1 = SvPVbyte_nolen (req->sv1);
		798	}
		799	else
		800	{
		801	req->type = EIO_FTRUNCATE;
		802	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		803	}
		804
		805	REQ_SEND;
		806	}
		807
		808	void
		809	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		810	ALIAS:
		811	aio_chmod = EIO_CHMOD
		812	aio_mkdir = EIO_MKDIR
		813	PPCODE:
		814	{
		815	dREQ;
		816
		817	req->int2 = mode;
		818	req->sv1 = newSVsv (fh_or_path);
		819
		820	if (SvPOK (req->sv1))
		821	{
		822	req->type = ix;
		823	req->ptr1 = SvPVbyte_nolen (req->sv1);
		824	}
		825	else
		826	{
		827	req->type = EIO_FCHMOD;
		828	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		829	}
		830
		831	REQ_SEND;
		832	}
		833
		834	void
		835	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		836	PPCODE:
		837	{
		838	dREQ;
		839
		840	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		841	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		842	req->sv1 = newSVsv (fh_or_path);
		843
		844	if (SvPOK (req->sv1))
		845	{
		846	req->type = EIO_CHOWN;
		847	req->ptr1 = SvPVbyte_nolen (req->sv1);
		848	}
		849	else
		850	{
		851	req->type = EIO_FCHOWN;
		852	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		853	}
		854
		855	REQ_SEND;
		856	}
		857
		858	void
		859	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		860	ALIAS:
		861	aio_unlink = EIO_UNLINK
		862	aio_rmdir = EIO_RMDIR
		863	aio_readdir = EIO_READDIR
		864	PPCODE:
		865	{
		866	dREQ;
		867
		868	req->type = ix;
		869	req->sv1 = newSVsv (pathname);
		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871
		872	REQ_SEND;
		873	}
		874
		875	void
		876	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		877	ALIAS:
		878	aio_link = EIO_LINK
		879	aio_symlink = EIO_SYMLINK
		880	aio_rename = EIO_RENAME
		881	PPCODE:
		882	{
		883	dREQ;
		884
		885	req->type = ix;
		886	req->sv1 = newSVsv (oldpath);
		887	req->ptr1 = SvPVbyte_nolen (req->sv1);
		888	req->sv2 = newSVsv (newpath);
		889	req->ptr2 = SvPVbyte_nolen (req->sv2);
		890
		891	REQ_SEND;
		892	}
		893
		894	void
		895	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		896	PPCODE:
		897	{
		898	dREQ;
		899
		900	req->type = EIO_MKNOD;
		901	req->sv1 = newSVsv (pathname);
		902	req->ptr1 = SvPVbyte_nolen (req->sv1);
		903	req->int2 = (mode_t)mode;
		904	req->offs = dev;
		905
		906	REQ_SEND;
		907	}
		908
		909	void
		910	aio_busy (double delay, SV *callback=&PL_sv_undef)
		911	PPCODE:
		912	{
		913	dREQ;
		914
		915	req->type = EIO_BUSY;
		916	req->nv1 = delay < 0. ? 0. : delay;
		917
		918	REQ_SEND;
		919	}
		920
		921	void
		922	aio_group (SV *callback=&PL_sv_undef)
		923	PROTOTYPE: ;$
		924	PPCODE:
		925	{
		926	dREQ;
		927
		928	req->type = EIO_GROUP;
		929
		930	req_submit (req);
		931	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		932	}
		933
		934	void
		935	aio_nop (SV *callback=&PL_sv_undef)
		936	ALIAS:
		937	aio_nop = EIO_NOP
		938	aio_sync = EIO_SYNC
		939	PPCODE:
		940	{
		941	dREQ;
		942
		943	req->type = ix;
		944
		945	REQ_SEND;
		946	}
		947
		948	int
		949	aioreq_pri (int pri = 0)
		950	PROTOTYPE: ;$
		951	CODE:
		952	RETVAL = next_pri;
		953	if (items > 0)
		954	{
		955	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		956	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		957	next_pri = pri;
		958	}
		959	OUTPUT:
		960	RETVAL
		961
		962	void
		963	aioreq_nice (int nice = 0)
		964	CODE:
		965	nice = next_pri - nice;
		966	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		967	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		968	next_pri = nice;
		969
		970	void
		971	flush ()
		972	PROTOTYPE:
		973	CODE:
		974	while (eio_nreqs ())
398	{	975	{
399	poll_wait ();	976	poll_wait ();
400	poll_cb (aTHX);	977	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	{	978	}
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		979
540	req->callback = SvREFCNT_inc (callback);	980	int
541		981	poll()
542	send_req (req);
543	}
544
545	void
546	aio_unlink(pathname,callback)
547	SV * pathname
548	SV * callback
549	PROTOTYPE: $$	982	PROTOTYPE:
550	CODE:	983	CODE:
551	{	984	poll_wait ();
552	aio_req req;	985	RETVAL = poll_cb ();
553		986	OUTPUT:
554	Newz (0, req, 1, aio_cb);	987	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		988
567	int	989	int
568	poll_fileno()	990	poll_fileno()
569	PROTOTYPE:	991	PROTOTYPE:
570	CODE:	992	CODE:
…		…
574		996
575	int	997	int
576	poll_cb(...)	998	poll_cb(...)
577	PROTOTYPE:	999	PROTOTYPE:
578	CODE:	1000	CODE:
579	RETVAL = poll_cb (aTHX);	1001	RETVAL = poll_cb ();
580	OUTPUT:	1002	OUTPUT:
581	RETVAL	1003	RETVAL
582		1004
583	void	1005	void
584	poll_wait()	1006	poll_wait()
585	PROTOTYPE:	1007	PROTOTYPE:
586	CODE:	1008	CODE:
587	if (nreqs)
588	poll_wait ();	1009	poll_wait ();
589		1010
590	int	1011	int
591	nreqs()	1012	nreqs()
592	PROTOTYPE:	1013	PROTOTYPE:
593	CODE:	1014	CODE:
594	RETVAL = nreqs;	1015	RETVAL = eio_nreqs ();
595	OUTPUT:	1016	OUTPUT:
596	RETVAL	1017	RETVAL
597		1018
		1019	int
		1020	nready()
		1021	PROTOTYPE:
		1022	CODE:
		1023	RETVAL = eio_nready ();
		1024	OUTPUT:
		1025	RETVAL
		1026
		1027	int
		1028	npending()
		1029	PROTOTYPE:
		1030	CODE:
		1031	RETVAL = eio_npending ();
		1032	OUTPUT:
		1033	RETVAL
		1034
		1035	int
		1036	nthreads()
		1037	PROTOTYPE:
		1038	CODE:
		1039	RETVAL = eio_nthreads ();
		1040	OUTPUT:
		1041	RETVAL
		1042
		1043	void _on_next_submit (SV *cb)
		1044	CODE:
		1045	SvREFCNT_dec (on_next_submit);
		1046	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1047
		1048	PROTOTYPES: DISABLE
		1049
		1050	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1051
		1052	void
		1053	cancel (aio_req_ornot req)
		1054	CODE:
		1055	eio_cancel (req);
		1056
		1057	void
		1058	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1059	PPCODE:
		1060	{
		1061	if (GIMME_V != G_VOID)
		1062	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1063
		1064	if (items > 1)
		1065	{
		1066	SV *cb_cv = get_cb (callback);
		1067
		1068	SvREFCNT_dec (req->callback);
		1069	req->callback = SvREFCNT_inc (cb_cv);
		1070	}
		1071	}
		1072
		1073	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1074
		1075	void
		1076	add (aio_req grp, ...)
		1077	PPCODE:
		1078	{
		1079	int i;
		1080
		1081	if (grp->int1 == 2)
		1082	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1083
		1084	for (i = 1; i < items; ++i )
		1085	{
		1086	aio_req req;
		1087
		1088	if (GIMME_V != G_VOID)
		1089	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1090
		1091	req = SvAIO_REQ (ST (i));
		1092
		1093	if (req)
		1094	eio_grp_add (grp, req);
		1095	}
		1096	}
		1097
		1098	void
		1099	cancel_subs (aio_req_ornot req)
		1100	CODE:
		1101	req_cancel_subs (req);
		1102
		1103	void
		1104	result (aio_req grp, ...)
		1105	CODE:
		1106	{
		1107	int i;
		1108	AV *av;
		1109
		1110	grp->errorno = errno;
		1111
		1112	av = newAV ();
		1113
		1114	for (i = 1; i < items; ++i )
		1115	av_push (av, newSVsv (ST (i)));
		1116
		1117	SvREFCNT_dec (grp->sv1);
		1118	grp->sv1 = (SV *)av;
		1119	}
		1120
		1121	void
		1122	errno (aio_req grp, int errorno = errno)
		1123	CODE:
		1124	grp->errorno = errorno;
		1125
		1126	void
		1127	limit (aio_req grp, int limit)
		1128	CODE:
		1129	eio_grp_limit (grp, limit);
		1130
		1131	void
		1132	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1133	CODE:
		1134	{
		1135	SvREFCNT_dec (grp->sv2);
		1136	grp->sv2 = newSVsv (callback);
		1137	grp->feed = aio_grp_feed;
		1138
		1139	if (grp->int2 <= 0)
		1140	grp->int2 = 2;
		1141
		1142	eio_grp_limit (grp, grp->int2);
		1143	}
		1144

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