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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.9 by root, Tue Jul 12 11:02:54 2005 UTC vs.
Revision 1.138 by root, Tue Apr 21 20:06:05 2009 UTC

		1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
		9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
5	#include <sys/types.h>	12	#include <sys/types.h>
6	#include <sys/stat.h>	13	#include <sys/stat.h>
7	#include <unistd.h>	14	#include <limits.h>
8	#include <fcntl.h>	15	#include <fcntl.h>
9	#include <signal.h>
10	#include <sched.h>	16	#include <sched.h>
11		17
12	#include <pthread.h>	18	/* perl namespace pollution */
13	#include <sys/syscall.h>	19	#undef VERSION
14		20
15	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	#ifdef _WIN32
16	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
17	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
18		22
19	#if __ia64	23	# define EIO_STRUCT_DIRENT Direntry_t
20	# define STACKSIZE 65536	24	# undef malloc
		25	# undef free
		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
21	#else	59	#else
22	# define STACKSIZE 4096	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
23	#endif	68	#endif
24		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
25	enum {	119	enum {
26	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
27	REQ_OPEN, REQ_CLOSE,
28	REQ_READ, REQ_WRITE, REQ_READAHEAD,
29	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
30	REQ_FSYNC, REQ_FDATASYNC,
31	};	121	};
32		122
33	typedef struct aio_cb {	123	#include "libeio/eio.c"
34	struct aio_cb *volatile next;
35		124
36	int type;
37
38	int fd;
39	off_t offset;
40	size_t length;
41	ssize_t result;
42	mode_t mode; /* open */
43	int errorno;
44	SV *data, *callback;
45	void *dataptr;
46	STRLEN dataoffset;
47
48	Stat_t *statdata;
49	} aio_cb;
50
51	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
52		127
53	static int started;	128	static SV *on_next_submit;
54	static int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
55	static int max_outstanding = 1<<30;	130	static int max_outstanding;
56	static int respipe [2];
57		131
58	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
59	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
60	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
61		133
62	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
63	static volatile aio_req ress, rese; /* queue start, queue end */	135	static void req_cancel (aio_req req);
		136
		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	{
		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 */
		330
		331	default:
		332	PUSHs (sv_2mortal (newSViv (req->result)));
		333	break;
		334	}
		335
		336	errno = req->errorno;
		337
		338	PUTBACK;
		339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		340	SPAGAIN;
		341
		342	FREETMPS;
		343	LEAVE;
		344
		345	PUTBACK;
		346	}
		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
64		384
65	static void	385	static void
66	poll_wait ()	386	create_respipe (void)
67	{	387	{
68	if (!nreqs)	388	int old_readfd = respipe [0];
69	return;
70		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	{
71	fd_set rfd;	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
72	FD_ZERO(&rfd);	440	FD_ZERO (&rfd);
73	FD_SET(respipe [0], &rfd);	441	FD_SET (respipe [0], &rfd);
74		442
75	select (respipe [0] + 1, &rfd, 0, 0, 0);	443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
76	}
77
78	static int
79	poll_cb ()
80	{
81	dSP;
82	int count = 0;
83	aio_req req;
84
85	{
86	/* read and signals sent by the worker threads */
87	char buf [32];
88	while (read (respipe [0], buf, 32) > 0)
89	;
90	}	444	}
		445	}
91		446
		447	static int poll_cb (void)
		448	{
92	for (;;)	449	for (;;)
93	{	450	{
94	pthread_mutex_lock (&reslock);	451	int res = eio_poll ();
95		452
96	req = ress;
97
98	if (ress)	453	if (res > 0)
99	{
100	ress = ress->next;
101	if (!ress) rese = 0;
102	}
103
104	pthread_mutex_unlock (&reslock);
105
106	if (!req)
107	break;	454	croak (0);
108		455
109	nreqs--;	456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
110		458
111	if (req->type == REQ_QUIT)	459	poll_wait ();
112	started--;
113	else
114	{
115	int errorno = errno;
116	errno = req->errorno;
117
118	if (req->type == REQ_READ)
119	SvCUR_set (req->data, req->dataoffset
120	+ req->result > 0 ? req->result : 0);
121
122	if (req->data)
123	SvREFCNT_dec (req->data);
124
125	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
126	{
127	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
128	PL_laststatval = req->result;
129	PL_statcache = *(req->statdata);
130
131	Safefree (req->statdata);
132	}
133
134	PUSHMARK (SP);
135	XPUSHs (sv_2mortal (newSViv (req->result)));
136
137	if (req->type == REQ_OPEN)
138	{
139	/* convert fd to fh */
140	SV *fh;
141
142	PUTBACK;
143	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
144	SPAGAIN;
145
146	fh = POPs;
147
148	PUSHMARK (SP);
149	XPUSHs (fh);
150	}
151
152	if (SvOK (req->callback))
153	{
154	PUTBACK;
155	call_sv (req->callback, G_VOID | G_EVAL);
156	SPAGAIN;
157	}
158
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161
162	errno = errorno;
163	count++;
164	}
165
166	Safefree (req);
167	}	460	}
168
169	return count;
170	}	461	}
171		462
172	static void *aio_proc(void *arg);	463	static void atfork_child (void)
173
174	static void
175	start_thread (void)
176	{	464	{
177	sigset_t fullsigset, oldsigset;	465	create_respipe ();
178	pthread_t tid;
179	pthread_attr_t attr;
180
181	pthread_attr_init (&attr);
182	pthread_attr_setstacksize (&attr, STACKSIZE);
183	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
184
185	sigfillset (&fullsigset);
186	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
187
188	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
189	started++;
190
191	sigprocmask (SIG_SETMASK, &oldsigset, 0);
192	}	466	}
193		467
194	static void	468	static SV *
195	send_req (aio_req req)	469	get_cb (SV *cb_sv)
196	{	470	{
197	nreqs++;	471	HV *st;
		472	GV *gvp;
		473	CV *cv;
198		474
199	pthread_mutex_lock (&reqlock);	475	if (!SvOK (cb_sv))
		476	return 0;
200		477
201	req->next = 0;	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
202		479
203	if (reqe)	480	if (!cv)
204	{	481	croak ("IO::AIO callback must be undef or a CODE reference");
205	reqe->next = req;
206	reqe = req;
207	}
208	else
209	reqe = reqs = req;
210		482
211	pthread_cond_signal (&reqwait);	483	return (SV *)cv;
212	pthread_mutex_unlock (&reqlock);
213
214	while (nreqs > max_outstanding)
215	{
216	poll_wait ();
217	poll_cb ();
218	}
219	}	484	}
220		485
221	static void	486	#define dREQ \
222	end_thread (void)	487	SV *cb_cv; \
223	{
224	aio_req req;	488	aio_req req; \
225	New (0, req, 1, aio_cb);	489	int req_pri = next_pri; \
226	req->type = REQ_QUIT;	490	next_pri = EIO_PRI_DEFAULT; \
227		491	\
228	send_req (req);	492	cb_cv = get_cb (callback); \
229	}	493	\
230
231	static void
232	read_write (int dowrite, int fd, off_t offset, size_t length,
233	SV *data, STRLEN dataoffset, SV *callback)
234	{
235	aio_req req;
236	STRLEN svlen;
237	char *svptr = SvPV (data, svlen);
238
239	SvUPGRADE (data, SVt_PV);
240	SvPOK_on (data);
241
242	if (dataoffset < 0)
243	dataoffset += svlen;
244
245	if (dataoffset < 0 || dataoffset > svlen)
246	croak ("data offset outside of string");
247
248	if (dowrite)
249	{
250	/* write: check length and adjust. */
251	if (length < 0 || length + dataoffset > svlen)
252	length = svlen - dataoffset;
253	}
254	else
255	{
256	/* read: grow scalar as necessary */
257	svptr = SvGROW (data, length + dataoffset);
258	}
259
260	if (length < 0)
261	croak ("length must not be negative");
262
263	Newz (0, req, 1, aio_cb);	494	Newz (0, req, 1, eio_req); \
264		495	if (!req) \
265	if (!req)
266	croak ("out of memory during aio_req allocation");	496	croak ("out of memory during eio_req allocation"); \
267		497	\
268	req->type = dowrite ? REQ_WRITE : REQ_READ;
269	req->fd = fd;
270	req->offset = offset;
271	req->length = length;
272	req->data = SvREFCNT_inc (data);
273	req->dataptr = (char *)svptr + dataoffset;
274	req->callback = SvREFCNT_inc (callback);	498	req->callback = SvREFCNT_inc (cb_cv); \
		499	req->pri = req_pri
275		500
276	send_req (req);	501	#define REQ_SEND \
277	}	502	PUTBACK; \
		503	req_submit (req); \
		504	SPAGAIN; \
		505	\
		506	if (GIMME_V != G_VOID) \
		507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
278		508
279	static void *	509	static int
280	aio_proc (void *thr_arg)	510	extract_fd (SV *fh, int wr)
281	{	511	{
282	aio_req req;	512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
283	int type;
284		513
285	do	514	if (fd < 0)
286	{	515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
287	pthread_mutex_lock (&reqlock);
288		516
289	for (;;)	517	return fd;
290	{	518	}
291	req = reqs;
292		519
293	if (reqs)	520	MODULE = IO::AIO PACKAGE = IO::AIO
294	{
295	reqs = reqs->next;
296	if (!reqs) reqe = 0;
297	}
298		521
299	if (req)	522	PROTOTYPES: ENABLE
300	break;
301		523
302	pthread_cond_wait (&reqwait, &reqlock);	524	BOOT:
303	}	525	{
		526	stash = gv_stashpv ("IO::AIO", 1);
304		527
305	pthread_mutex_unlock (&reqlock);	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
306		529	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
307	errno = 0; /* strictly unnecessary */	530	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
308		531	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
309	type = req->type;	532	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
310		533	#ifndef _WIN32
311	switch (type)	534	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
312	{
313	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
314	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
315	#if SYS_readahead
316	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
317	#else
318	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
319	#endif	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));
320		540
321	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	541	create_respipe ();
322	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
323	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
324		542
325	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	543	if (eio_init (want_poll, done_poll) < 0)
326	case REQ_CLOSE: req->result = close (req->fd); break;	544	croak ("IO::AIO: unable to initialise eio library");
327	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
328		545
329	case REQ_FSYNC: req->result = fsync (req->fd); break;	546	/* atfork child called in fifo order, so before eio's handler */
330	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	547	X_THREAD_ATFORK (0, 0, atfork_child);
331
332	case REQ_QUIT:
333	break;
334
335	default:
336	req->result = ENOSYS;
337	break;
338	}
339
340	req->errorno = errno;
341
342	pthread_mutex_lock (&reslock);
343
344	req->next = 0;
345
346	if (rese)
347	{
348	rese->next = req;
349	rese = req;
350	}
351	else
352	{
353	rese = ress = req;
354
355	/* write a dummy byte to the pipe so fh becomes ready */
356	write (respipe [1], &respipe, 1);
357	}
358
359	pthread_mutex_unlock (&reslock);
360	}
361	while (type != REQ_QUIT);
362
363	return 0;
364	}	548	}
365		549
366	MODULE = IO::AIO PACKAGE = IO::AIO
367
368	PROTOTYPES: ENABLE
369
370	BOOT:
371	{
372	if (pipe (respipe))
373	croak ("unable to initialize result pipe");
374
375	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
376	croak ("cannot set result pipe to nonblocking mode");
377
378	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
379	croak ("cannot set result pipe to nonblocking mode");
380	}
381
382	void	550	void
383	min_parallel(nthreads)	551	max_poll_reqs (int nreqs)
384	int nthreads
385	PROTOTYPE: $	552	PROTOTYPE: $
386	CODE:	553	CODE:
387	while (nthreads > started)	554	eio_set_max_poll_reqs (nreqs);
388	start_thread ();
389		555
390	void	556	void
391	max_parallel(nthreads)	557	max_poll_time (double nseconds)
392	int nthreads
393	PROTOTYPE: $	558	PROTOTYPE: $
394	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: $$$;$
		589	PPCODE:
395	{	590	{
396	int cur = started;	591	dREQ;
397	while (cur > nthreads)	592
398	{	593	req->type = EIO_OPEN;
399	end_thread ();	594	req->sv1 = newSVsv (pathname);
		595	req->ptr1 = SvPVbyte_nolen (req->sv1);
		596	req->int1 = flags;
		597	req->int2 = mode;
		598
		599	REQ_SEND;
		600	}
		601
		602	void
		603	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		604	PROTOTYPE: $;$
		605	ALIAS:
		606	aio_fsync = EIO_FSYNC
		607	aio_fdatasync = EIO_FDATASYNC
		608	PPCODE:
		609	{
		610	int fd = extract_fd (fh, 0);
		611	dREQ;
		612
		613	req->type = ix;
		614	req->sv1 = newSVsv (fh);
		615	req->int1 = fd;
		616
		617	REQ_SEND (req);
		618	}
		619
		620	void
		621	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		622	PROTOTYPE: $$$$;$
		623	PPCODE:
		624	{
		625	int fd = extract_fd (fh, 0);
		626	dREQ;
		627
		628	req->type = EIO_SYNC_FILE_RANGE;
		629	req->sv1 = newSVsv (fh);
		630	req->int1 = fd;
		631	req->offs = SvVAL64 (offset);
		632	req->size = SvVAL64 (nbytes);
		633	req->int2 = flags;
		634
		635	REQ_SEND (req);
		636	}
		637
		638	void
		639	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		640	PROTOTYPE: $;$
		641	PPCODE:
		642	{
		643	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		644	int fd = extract_fd (fh, 0);
		645	dREQ;
		646
		647	if (close_pipe < 0)
		648	{
		649	int pipefd [2];
		650
		651	if (pipe (pipefd) < 0
		652	|| close (pipefd [1]) < 0
		653	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		654	abort (); /*D*/
		655
		656	close_pipe = pipefd [0];
		657	}
		658
		659	req->type = EIO_DUP2;
		660	req->int1 = close_pipe;
		661	req->sv2 = newSVsv (fh);
		662	req->int2 = fd;
		663
		664	REQ_SEND (req);
		665	}
		666
		667	void
		668	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		669	ALIAS:
		670	aio_read = EIO_READ
		671	aio_write = EIO_WRITE
		672	PROTOTYPE: $$$$$;$
		673	PPCODE:
		674	{
		675	STRLEN svlen;
		676	int fd = extract_fd (fh, ix == EIO_WRITE);
		677	char *svptr = SvPVbyte (data, svlen);
		678	UV len = SvUV (length);
		679
		680	if (dataoffset < 0)
		681	dataoffset += svlen;
		682
		683	if (dataoffset < 0 || dataoffset > svlen)
		684	croak ("dataoffset outside of data scalar");
		685
		686	if (ix == EIO_WRITE)
		687	{
		688	/* write: check length and adjust. */
		689	if (!SvOK (length) || len + dataoffset > svlen)
		690	len = svlen - dataoffset;
		691	}
		692	else
		693	{
		694	/* read: check type and grow scalar as necessary */
		695	SvUPGRADE (data, SVt_PV);
		696	svptr = SvGROW (data, len + dataoffset + 1);
		697	}
		698
		699	if (len < 0)
		700	croak ("length must not be negative");
		701
		702	{
		703	dREQ;
		704
		705	req->type = ix;
		706	req->sv1 = newSVsv (fh);
		707	req->int1 = fd;
		708	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		709	req->size = len;
		710	req->sv2 = SvREFCNT_inc (data);
		711	req->ptr2 = (char *)svptr + dataoffset;
		712	req->stroffset = dataoffset;
		713
		714	if (!SvREADONLY (data))
400	cur--;	715	{
		716	SvREADONLY_on (data);
		717	req->flags |= FLAG_SV2_RO_OFF;
401	}	718	}
402		719
403	while (started > nthreads)	720	REQ_SEND;
		721	}
		722	}
		723
		724	void
		725	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		726	PROTOTYPE: $$;$
		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 ())
404	{	1015	{
405	poll_wait ();	1016	poll_wait ();
406	poll_cb ();	1017	poll_cb ();
407	}	1018	}
408	}
409		1019
410	int	1020	int
411	max_outstanding(nreqs)
412	int nreqs
413	PROTOTYPE: $
414	CODE:
415	RETVAL = max_outstanding;
416	max_outstanding = nreqs;
417
418	void
419	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
420	SV * pathname
421	int flags
422	int mode
423	SV * callback
424	PROTOTYPE: $$$;$
425	CODE:
426	{
427	aio_req req;
428
429	Newz (0, req, 1, aio_cb);
430
431	if (!req)
432	croak ("out of memory during aio_req allocation");
433
434	req->type = REQ_OPEN;
435	req->data = newSVsv (pathname);
436	req->dataptr = SvPV_nolen (req->data);
437	req->fd = flags;
438	req->mode = mode;
439	req->callback = SvREFCNT_inc (callback);
440
441	send_req (req);
442	}
443
444	void
445	aio_close(fh,callback=&PL_sv_undef)
446	InputStream fh
447	SV * callback
448	PROTOTYPE: $;$
449	ALIAS:
450	aio_close = REQ_CLOSE
451	aio_fsync = REQ_FSYNC
452	aio_fdatasync = REQ_FDATASYNC
453	CODE:
454	{
455	aio_req req;
456
457	Newz (0, req, 1, aio_cb);
458
459	if (!req)
460	croak ("out of memory during aio_req allocation");
461
462	req->type = ix;
463	req->fd = PerlIO_fileno (fh);
464	req->callback = SvREFCNT_inc (callback);
465
466	send_req (req);
467	}
468
469	void
470	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
471	InputStream fh
472	UV offset
473	IV length
474	SV * data
475	IV dataoffset
476	SV * callback
477	PROTOTYPE: $$$$$;$
478	CODE:
479	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
480
481	void
482	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
483	OutputStream fh
484	UV offset
485	IV length
486	SV * data
487	IV dataoffset
488	SV * callback
489	PROTOTYPE: $$$$$;$
490	CODE:
491	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
492
493	void
494	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
495	InputStream fh
496	UV offset
497	IV length
498	SV * callback
499	PROTOTYPE: $$$;$
500	CODE:
501	{
502	aio_req req;
503
504	if (length < 0)
505	croak ("length must not be negative");
506
507	Newz (0, req, 1, aio_cb);
508
509	if (!req)
510	croak ("out of memory during aio_req allocation");
511
512	req->type = REQ_READAHEAD;
513	req->fd = PerlIO_fileno (fh);
514	req->offset = offset;
515	req->length = length;
516	req->callback = SvREFCNT_inc (callback);
517
518	send_req (req);
519	}
520
521	void
522	aio_stat(fh_or_path,callback=&PL_sv_undef)
523	SV * fh_or_path
524	SV * callback
525	ALIAS:
526	aio_stat = REQ_STAT
527	aio_lstat = REQ_LSTAT
528	CODE:
529	{
530	aio_req req;
531
532	Newz (0, req, 1, aio_cb);
533
534	if (!req)
535	croak ("out of memory during aio_req allocation");
536
537	New (0, req->statdata, 1, Stat_t);
538
539	if (!req->statdata)
540	croak ("out of memory during aio_req->statdata allocation");
541
542	if (SvPOK (fh_or_path))
543	{
544	req->type = ix;
545	req->data = newSVsv (fh_or_path);
546	req->dataptr = SvPV_nolen (req->data);
547	}
548	else
549	{
550	req->type = REQ_FSTAT;
551	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
552	}
553
554	req->callback = SvREFCNT_inc (callback);
555
556	send_req (req);
557	}
558
559	void
560	aio_unlink(pathname,callback=&PL_sv_undef)
561	SV * pathname
562	SV * callback
563	CODE:
564	{
565	aio_req req;
566
567	Newz (0, req, 1, aio_cb);
568
569	if (!req)
570	croak ("out of memory during aio_req allocation");
571
572	req->type = REQ_UNLINK;
573	req->data = newSVsv (pathname);
574	req->dataptr = SvPV_nolen (req->data);
575	req->callback = SvREFCNT_inc (callback);
576
577	send_req (req);
578	}
579
580	void
581	flush()
582	PROTOTYPE:
583	CODE:
584	while (nreqs)
585	{
586	poll_wait ();
587	poll_cb ();
588	}
589
590	void
591	poll()	1021	poll()
592	PROTOTYPE:	1022	PROTOTYPE:
593	CODE:	1023	CODE:
594	if (nreqs)
595	{
596	poll_wait ();	1024	poll_wait ();
597	poll_cb ();	1025	RETVAL = poll_cb ();
598	}	1026	OUTPUT:
		1027	RETVAL
599		1028
600	int	1029	int
601	poll_fileno()	1030	poll_fileno()
602	PROTOTYPE:	1031	PROTOTYPE:
603	CODE:	1032	CODE:
…		…
615		1044
616	void	1045	void
617	poll_wait()	1046	poll_wait()
618	PROTOTYPE:	1047	PROTOTYPE:
619	CODE:	1048	CODE:
620	if (nreqs)
621	poll_wait ();	1049	poll_wait ();
622		1050
623	int	1051	int
624	nreqs()	1052	nreqs()
625	PROTOTYPE:	1053	PROTOTYPE:
626	CODE:	1054	CODE:
627	RETVAL = nreqs;	1055	RETVAL = eio_nreqs ();
628	OUTPUT:	1056	OUTPUT:
629	RETVAL	1057	RETVAL
630		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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