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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.14 by root, Sat Jul 23 18:15:36 2005 UTC vs.
Revision 1.140 by root, Wed Jun 3 12:24:49 2009 UTC

		1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
		4
		5	#include "EXTERN.h"
1	#include "perl.h"	6	#include "perl.h"
2	#include "XSUB.h"	7	#include "XSUB.h"
3		8
		9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
4	#include <sys/types.h>	12	#include <sys/types.h>
5	#include <sys/stat.h>	13	#include <sys/stat.h>
6
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	#if __linux	17
		18	/* perl namespace pollution */
		19	#undef VERSION
		20
		21	#ifdef _WIN32
		22
		23	# define EIO_STRUCT_DIRENT Direntry_t
		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
		59	#else
		60
		61	# include <sys/time.h>
12	#include <sys/syscall.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
13	#endif	68	#endif
14		69
15	#include <pthread.h>	70	/* perl stupidly overrides readdir and maybe others */
		71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
16		75
17	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	76	#define EIO_STRUCT_STAT Stat_t
18	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
19	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
20		77
21	#if __ia64	78	/* use NV for 32 bit perls as it allows larger offsets */
22	# define STACKSIZE 65536	79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
23	#else	81	#else
24	# define STACKSIZE 4096	82	# define SvVAL64 SvNV
25	#endif	83	#endif
26		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
27	enum {	119	enum {
28	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
29	REQ_OPEN, REQ_CLOSE,
30	REQ_READ, REQ_WRITE, REQ_READAHEAD,
31	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
32	REQ_FSYNC, REQ_FDATASYNC,
33	};	121	};
34		122
35	typedef struct aio_cb {	123	#include "libeio/eio.c"
36	struct aio_cb *volatile next;
37		124
38	int type;
39
40	int fd;
41	off_t offset;
42	size_t length;
43	ssize_t result;
44	mode_t mode; /* open */
45	int errorno;
46	SV *data, *callback, *fh;
47	void *dataptr;
48	STRLEN dataoffset;
49
50	Stat_t *statdata;
51	} aio_cb;
52
53	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
54		127
55	static int started;	128	static SV *on_next_submit;
56	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
57	static int max_outstanding = 1<<30;	130	static int max_outstanding;
58	static int respipe [2];
59		131
60	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
61	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
62	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
63		133
64	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
65	static volatile aio_req ress, rese; /* queue start, queue end */	135	static void req_cancel (aio_req req);
66		136
67	static void	137	static void want_poll (void)
68	poll_wait ()
69	{	138	{
70	if (nreqs && !ress)	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)
71	{	155	{
72	fd_set rfd;	156	req->self = (SV *)newHV ();
73	FD_ZERO(&rfd);	157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
74	FD_SET(respipe [0], &rfd);
75
76	select (respipe [0] + 1, &rfd, 0, 0, 0);
77	}	158	}
78	}
79		159
80	static int	160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
81	poll_cb ()	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)
82	{	211	{
83	dSP;	212	dSP;
84	int count = 0;
85	aio_req req, prv;
86		213
87	pthread_mutex_lock (&reslock);	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
88		216
89	{	217	if (!EIO_CANCELLED (req) && req->callback)
90	/* read any signals sent by the worker threads */
91	char buf [32];
92	while (read (respipe [0], buf, 32) > 0)
93	;
94	}
95
96	req = ress;
97	ress = rese = 0;
98
99	pthread_mutex_unlock (&reslock);
100
101	while (req)
102	{	218	{
103	nreqs--;	219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
104		223
105	if (req->type == REQ_QUIT)	224	switch (req->type)
106	started--;
107	else
108	{	225	{
109	int errorno = errno;	226	case EIO_READDIR:
110	errno = req->errorno;
111
112	if (req->type == REQ_READ)
113	SvCUR_set (req->data, req->dataoffset
114	+ req->result > 0 ? req->result : 0);
115
116	if (req->data)
117	SvREFCNT_dec (req->data);
118
119	if (req->fh)
120	SvREFCNT_dec (req->fh);
121
122	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
123	{	227	{
124	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	228	SV *rv = &PL_sv_undef;
125	PL_laststatval = req->result;
126	PL_statcache = *(req->statdata);
127		229
128	Safefree (req->statdata);	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);
129	}	250	}
		251	break;
130		252
131	ENTER;	253	case EIO_OPEN:
132	PUSHMARK (SP);
133	XPUSHs (sv_2mortal (newSViv (req->result)));
134
135	if (req->type == REQ_OPEN)
136	{	254	{
137	/* convert fd to fh */	255	/* convert fd to fh */
138	SV *fh;	256	SV *fh = &PL_sv_undef;
139		257
140	PUTBACK;	258	if (req->result >= 0)
141	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	259	{
142	SPAGAIN;	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);
143		267
144	fh = SvREFCNT_inc (POPs);	268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
145		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
146	PUSHMARK (SP);	280	PUSHs (fh);
147	XPUSHs (sv_2mortal (fh));
148	}	281	}
		282	break;
149		283
150	if (SvOK (req->callback))	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:
151	{	317	{
152	PUTBACK;	318	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
153	call_sv (req->callback, G_VOID | G_EVAL);	319	*SvEND (req->sv2) = 0;
154	SPAGAIN;	320	SvPOK_only (req->sv2);
		321	SvSETMAGIC (req->sv2);
		322	PUSHs (sv_2mortal (newSViv (req->result)));
155	}	323	}
156
157	LEAVE;
158
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161
162	errno = errorno;
163	count++;
164	}
165
166	prv = req;
167	req = req->next;
168	Safefree (prv);
169
170	/* TODO: croak on errors? */
171	}
172
173	return count;
174	}
175
176	static void *aio_proc(void *arg);
177
178	static void
179	start_thread (void)
180	{
181	sigset_t fullsigset, oldsigset;
182	pthread_t tid;
183	pthread_attr_t attr;
184
185	pthread_attr_init (&attr);
186	pthread_attr_setstacksize (&attr, STACKSIZE);
187	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
188
189	sigfillset (&fullsigset);
190	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
191
192	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
193	started++;
194
195	sigprocmask (SIG_SETMASK, &oldsigset, 0);
196	}
197
198	static void
199	send_req (aio_req req)
200	{
201	nreqs++;
202
203	pthread_mutex_lock (&reqlock);
204
205	req->next = 0;
206
207	if (reqe)
208	{
209	reqe->next = req;
210	reqe = req;
211	}
212	else
213	reqe = reqs = req;
214
215	pthread_cond_signal (&reqwait);
216	pthread_mutex_unlock (&reqlock);
217
218	while (nreqs > max_outstanding)
219	{
220	poll_wait ();
221	poll_cb ();
222	}
223	}
224
225	static void
226	end_thread (void)
227	{
228	aio_req req;
229	New (0, req, 1, aio_cb);
230	req->type = REQ_QUIT;
231
232	send_req (req);
233	}
234
235	static void *
236	aio_proc (void *thr_arg)
237	{
238	aio_req req;
239	int type;
240
241	do
242	{
243	pthread_mutex_lock (&reqlock);
244
245	for (;;)
246	{
247	req = reqs;
248
249	if (reqs)
250	{
251	reqs = reqs->next;
252	if (!reqs) reqe = 0;
253	}
254
255	if (req)
256	break;	324	break;
257		325
258	pthread_cond_wait (&reqwait, &reqlock);
259	}
260
261	pthread_mutex_unlock (&reqlock);
262
263	errno = 0; /* strictly unnecessary */
264
265	type = req->type;
266
267	switch (type)
268	{
269	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
270	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
271	#if SYS_readahead
272	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
273	#else
274	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
275	#endif
276
277	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
278	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
279	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
280
281	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
282	case REQ_CLOSE: req->result = close (req->fd); break;
283	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
284
285	case REQ_FSYNC: req->result = fsync (req->fd); break;
286	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
287
288	case REQ_QUIT:	326	case EIO_DUP2:
289	break;	327	if (req->result > 0)
		328	req->result = 0;
		329	/* FALLTHROUGH */
290		330
291	default:	331	default:
292	req->result = ENOSYS;	332	PUSHs (sv_2mortal (newSViv (req->result)));
293	break;	333	break;
294	}	334	}
295		335
296	req->errorno = errno;	336	errno = req->errorno;
297		337
298	pthread_mutex_lock (&reslock);	338	PUTBACK;
		339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		340	SPAGAIN;
299		341
300	req->next = 0;	342	FREETMPS;
		343	LEAVE;
301		344
302	if (rese)	345	PUTBACK;
303	{
304	rese->next = req;
305	rese = req;
306	}
307	else
308	{
309	rese = ress = req;
310
311	/* write a dummy byte to the pipe so fh becomes ready */
312	write (respipe [1], &respipe, 1);
313	}
314
315	pthread_mutex_unlock (&reslock);
316	}	346	}
317	while (type != REQ_QUIT);
318		347
		348	return !!SvTRUE (ERRSV);
		349	}
		350
		351	static void req_destroy (aio_req req)
		352	{
		353	if (req->self)
		354	{
		355	sv_unmagic (req->self, PERL_MAGIC_ext);
		356	SvREFCNT_dec (req->self);
		357	}
		358
		359	SvREFCNT_dec (req->sv1);
		360	SvREFCNT_dec (req->sv2);
		361	SvREFCNT_dec (req->callback);
		362
		363	Safefree (req);
		364	}
		365
		366	static void req_cancel_subs (aio_req grp)
		367	{
		368	aio_req sub;
		369
		370	if (grp->type != EIO_GROUP)
		371	return;
		372
		373	SvREFCNT_dec (grp->sv2);
		374	grp->sv2 = 0;
		375
		376	eio_grp_cancel (grp);
		377	}
		378
		379	#ifdef USE_SOCKETS_AS_HANDLES
		380	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		381	#else
		382	# define TO_SOCKET(x) (x)
		383	#endif
		384
		385	static void
		386	create_respipe (void)
		387	{
		388	int old_readfd = respipe [0];
		389
		390	if (respipe [1] >= 0)
		391	respipe_close (TO_SOCKET (respipe [1]));
		392
		393	#ifdef _WIN32
		394	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		395	#else
		396	if (pipe (respipe))
		397	#endif
		398	croak ("unable to initialize result pipe");
		399
		400	if (old_readfd >= 0)
		401	{
		402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		403	croak ("unable to initialize result pipe(2)");
		404
		405	respipe_close (respipe [0]);
		406	respipe [0] = old_readfd;
		407	}
		408
		409	#ifdef _WIN32
		410	int arg = 1;
		411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		413	#else
		414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
		418
		419	respipe_osf [0] = TO_SOCKET (respipe [0]);
		420	respipe_osf [1] = TO_SOCKET (respipe [1]);
		421	}
		422
		423	static void poll_wait (void)
		424	{
		425	fd_set rfd;
		426
		427	while (eio_nreqs ())
		428	{
		429	int size;
		430
		431	X_LOCK (reslock);
		432	size = res_queue.size;
		433	X_UNLOCK (reslock);
		434
		435	if (size)
		436	return;
		437
		438	etp_maybe_start_thread ();
		439
		440	FD_ZERO (&rfd);
		441	FD_SET (respipe [0], &rfd);
		442
		443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		444	}
		445	}
		446
		447	static int poll_cb (void)
		448	{
		449	for (;;)
		450	{
		451	int res = eio_poll ();
		452
		453	if (res > 0)
		454	croak (0);
		455
		456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
		458
		459	poll_wait ();
		460	}
		461	}
		462
		463	static void atfork_child (void)
		464	{
		465	create_respipe ();
		466	}
		467
		468	static SV *
		469	get_cb (SV *cb_sv)
		470	{
		471	HV *st;
		472	GV *gvp;
		473	CV *cv;
		474
		475	if (!SvOK (cb_sv))
319	return 0;	476	return 0;
		477
		478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		479
		480	if (!cv)
		481	croak ("IO::AIO callback must be undef or a CODE reference");
		482
		483	return (SV *)cv;
		484	}
		485
		486	#define dREQ \
		487	SV *cb_cv; \
		488	aio_req req; \
		489	int req_pri = next_pri; \
		490	next_pri = EIO_PRI_DEFAULT; \
		491	\
		492	cb_cv = get_cb (callback); \
		493	\
		494	Newz (0, req, 1, eio_req); \
		495	if (!req) \
		496	croak ("out of memory during eio_req allocation"); \
		497	\
		498	req->callback = SvREFCNT_inc (cb_cv); \
		499	req->pri = req_pri
		500
		501	#define REQ_SEND \
		502	PUTBACK; \
		503	req_submit (req); \
		504	SPAGAIN; \
		505	\
		506	if (GIMME_V != G_VOID) \
		507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		508
		509	static int
		510	extract_fd (SV *fh, int wr)
		511	{
		512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		513
		514	if (fd < 0)
		515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		516
		517	return fd;
320	}	518	}
321		519
322	MODULE = IO::AIO PACKAGE = IO::AIO	520	MODULE = IO::AIO PACKAGE = IO::AIO
323		521
324	PROTOTYPES: ENABLE	522	PROTOTYPES: ENABLE
325		523
326	BOOT:	524	BOOT:
327	{	525	{
328	if (pipe (respipe))	526	stash = gv_stashpv ("IO::AIO", 1);
329	croak ("unable to initialize result pipe");
330		527
331	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
332	croak ("cannot set result pipe to nonblocking mode");	529	newCONSTSUB (stash, "ENOSYS", newSViv (ENOSYS));
		530	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		531	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		532	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		533	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		534	#ifndef _WIN32
		535	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		536	#endif
		537	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		538	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		539	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		540	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
333		541
334	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	542	create_respipe ();
335	croak ("cannot set result pipe to nonblocking mode");
336	}
337		543
		544	if (eio_init (want_poll, done_poll) < 0)
		545	croak ("IO::AIO: unable to initialise eio library");
		546
		547	/* atfork child called in fifo order, so before eio's handler */
		548	X_THREAD_ATFORK (0, 0, atfork_child);
		549	}
		550
338	void	551	void
339	min_parallel(nthreads)	552	max_poll_reqs (int nreqs)
340	int nthreads
341	PROTOTYPE: $	553	PROTOTYPE: $
342	CODE:	554	CODE:
343	while (nthreads > started)	555	eio_set_max_poll_reqs (nreqs);
344	start_thread ();
345		556
346	void	557	void
347	max_parallel(nthreads)	558	max_poll_time (double nseconds)
348	int nthreads
349	PROTOTYPE: $	559	PROTOTYPE: $
350	CODE:	560	CODE:
		561	eio_set_max_poll_time (nseconds);
		562
		563	void
		564	min_parallel (int nthreads)
		565	PROTOTYPE: $
		566	CODE:
		567	eio_set_min_parallel (nthreads);
		568
		569	void
		570	max_parallel (int nthreads)
		571	PROTOTYPE: $
		572	CODE:
		573	eio_set_max_parallel (nthreads);
		574
		575	void
		576	max_idle (int nthreads)
		577	PROTOTYPE: $
		578	CODE:
		579	eio_set_max_idle (nthreads);
		580
		581	void
		582	max_outstanding (int maxreqs)
		583	PROTOTYPE: $
		584	CODE:
		585	max_outstanding = maxreqs;
		586
		587	void
		588	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		589	PROTOTYPE: $$$;$
		590	PPCODE:
351	{	591	{
352	int cur = started;	592	dREQ;
353	while (cur > nthreads)	593
354	{	594	req->type = EIO_OPEN;
355	end_thread ();	595	req->sv1 = newSVsv (pathname);
		596	req->ptr1 = SvPVbyte_nolen (req->sv1);
		597	req->int1 = flags;
		598	req->int2 = mode;
		599
		600	REQ_SEND;
		601	}
		602
		603	void
		604	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		605	PROTOTYPE: $;$
		606	ALIAS:
		607	aio_fsync = EIO_FSYNC
		608	aio_fdatasync = EIO_FDATASYNC
		609	PPCODE:
		610	{
		611	int fd = extract_fd (fh, 0);
		612	dREQ;
		613
		614	req->type = ix;
		615	req->sv1 = newSVsv (fh);
		616	req->int1 = fd;
		617
		618	REQ_SEND (req);
		619	}
		620
		621	void
		622	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		623	PROTOTYPE: $$$$;$
		624	PPCODE:
		625	{
		626	int fd = extract_fd (fh, 0);
		627	dREQ;
		628
		629	req->type = EIO_SYNC_FILE_RANGE;
		630	req->sv1 = newSVsv (fh);
		631	req->int1 = fd;
		632	req->offs = SvVAL64 (offset);
		633	req->size = SvVAL64 (nbytes);
		634	req->int2 = flags;
		635
		636	REQ_SEND (req);
		637	}
		638
		639	void
		640	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		641	PROTOTYPE: $;$
		642	PPCODE:
		643	{
		644	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		645	int fd = extract_fd (fh, 0);
		646	dREQ;
		647
		648	if (close_pipe < 0)
		649	{
		650	int pipefd [2];
		651
		652	if (pipe (pipefd) < 0
		653	|| close (pipefd [1]) < 0
		654	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		655	abort (); /*D*/
		656
		657	close_pipe = pipefd [0];
		658	}
		659
		660	req->type = EIO_DUP2;
		661	req->int1 = close_pipe;
		662	req->sv2 = newSVsv (fh);
		663	req->int2 = fd;
		664
		665	REQ_SEND (req);
		666	}
		667
		668	void
		669	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		670	ALIAS:
		671	aio_read = EIO_READ
		672	aio_write = EIO_WRITE
		673	PROTOTYPE: $$$$$;$
		674	PPCODE:
		675	{
		676	STRLEN svlen;
		677	int fd = extract_fd (fh, ix == EIO_WRITE);
		678	char *svptr = SvPVbyte (data, svlen);
		679	UV len = SvUV (length);
		680
		681	if (dataoffset < 0)
		682	dataoffset += svlen;
		683
		684	if (dataoffset < 0 || dataoffset > svlen)
		685	croak ("dataoffset outside of data scalar");
		686
		687	if (ix == EIO_WRITE)
		688	{
		689	/* write: check length and adjust. */
		690	if (!SvOK (length) || len + dataoffset > svlen)
		691	len = svlen - dataoffset;
		692	}
		693	else
		694	{
		695	/* read: check type and grow scalar as necessary */
		696	SvUPGRADE (data, SVt_PV);
		697	svptr = SvGROW (data, len + dataoffset + 1);
		698	}
		699
		700	{
		701	dREQ;
		702
		703	req->type = ix;
		704	req->sv1 = newSVsv (fh);
		705	req->int1 = fd;
		706	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		707	req->size = len;
		708	req->sv2 = SvREFCNT_inc (data);
		709	req->ptr2 = (char *)svptr + dataoffset;
		710	req->stroffset = dataoffset;
		711
		712	if (!SvREADONLY (data))
356	cur--;	713	{
		714	SvREADONLY_on (data);
		715	req->flags |= FLAG_SV2_RO_OFF;
357	}	716	}
358		717
359	while (started > nthreads)	718	REQ_SEND;
		719	}
		720	}
		721
		722	void
		723	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		724	PROTOTYPE: $$;$
		725	PPCODE:
		726	{
		727	SV *data;
		728	dREQ;
		729
		730	req->type = EIO_READLINK;
		731	req->sv1 = newSVsv (path);
		732	req->ptr1 = SvPVbyte_nolen (req->sv1);
		733
		734	REQ_SEND;
		735	}
		736
		737	void
		738	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		739	PROTOTYPE: $$$$;$
		740	PPCODE:
		741	{
		742	int ifd = extract_fd (in_fh , 0);
		743	int ofd = extract_fd (out_fh, 0);
		744	dREQ;
		745
		746	req->type = EIO_SENDFILE;
		747	req->sv1 = newSVsv (out_fh);
		748	req->int1 = ofd;
		749	req->sv2 = newSVsv (in_fh);
		750	req->int2 = ifd;
		751	req->offs = SvVAL64 (in_offset);
		752	req->size = length;
		753
		754	REQ_SEND;
		755	}
		756
		757	void
		758	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		759	PROTOTYPE: $$$;$
		760	PPCODE:
		761	{
		762	int fd = extract_fd (fh, 0);
		763	dREQ;
		764
		765	req->type = EIO_READAHEAD;
		766	req->sv1 = newSVsv (fh);
		767	req->int1 = fd;
		768	req->offs = SvVAL64 (offset);
		769	req->size = length;
		770
		771	REQ_SEND;
		772	}
		773
		774	void
		775	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		776	ALIAS:
		777	aio_stat = EIO_STAT
		778	aio_lstat = EIO_LSTAT
		779	PPCODE:
		780	{
		781	dREQ;
		782
		783	req->sv1 = newSVsv (fh_or_path);
		784
		785	if (SvPOK (req->sv1))
		786	{
		787	req->type = ix;
		788	req->ptr1 = SvPVbyte_nolen (req->sv1);
		789	}
		790	else
		791	{
		792	req->type = EIO_FSTAT;
		793	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		794	}
		795
		796	REQ_SEND;
		797	}
		798
		799	void
		800	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		801	PPCODE:
		802	{
		803	dREQ;
		804
		805	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		806	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		807	req->sv1 = newSVsv (fh_or_path);
		808
		809	if (SvPOK (req->sv1))
		810	{
		811	req->type = EIO_UTIME;
		812	req->ptr1 = SvPVbyte_nolen (req->sv1);
		813	}
		814	else
		815	{
		816	req->type = EIO_FUTIME;
		817	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		818	}
		819
		820	REQ_SEND;
		821	}
		822
		823	void
		824	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		825	PPCODE:
		826	{
		827	dREQ;
		828
		829	req->sv1 = newSVsv (fh_or_path);
		830	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		831
		832	if (SvPOK (req->sv1))
		833	{
		834	req->type = EIO_TRUNCATE;
		835	req->ptr1 = SvPVbyte_nolen (req->sv1);
		836	}
		837	else
		838	{
		839	req->type = EIO_FTRUNCATE;
		840	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		841	}
		842
		843	REQ_SEND;
		844	}
		845
		846	void
		847	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		848	ALIAS:
		849	aio_chmod = EIO_CHMOD
		850	aio_mkdir = EIO_MKDIR
		851	PPCODE:
		852	{
		853	dREQ;
		854
		855	req->int2 = mode;
		856	req->sv1 = newSVsv (fh_or_path);
		857
		858	if (SvPOK (req->sv1))
		859	{
		860	req->type = ix;
		861	req->ptr1 = SvPVbyte_nolen (req->sv1);
		862	}
		863	else
		864	{
		865	req->type = EIO_FCHMOD;
		866	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		867	}
		868
		869	REQ_SEND;
		870	}
		871
		872	void
		873	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		874	PPCODE:
		875	{
		876	dREQ;
		877
		878	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		879	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		880	req->sv1 = newSVsv (fh_or_path);
		881
		882	if (SvPOK (req->sv1))
		883	{
		884	req->type = EIO_CHOWN;
		885	req->ptr1 = SvPVbyte_nolen (req->sv1);
		886	}
		887	else
		888	{
		889	req->type = EIO_FCHOWN;
		890	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		891	}
		892
		893	REQ_SEND;
		894	}
		895
		896	void
		897	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		898	ALIAS:
		899	aio_unlink = EIO_UNLINK
		900	aio_rmdir = EIO_RMDIR
		901	aio_readdir = EIO_READDIR
		902	PPCODE:
		903	{
		904	dREQ;
		905
		906	req->type = ix;
		907	req->sv1 = newSVsv (pathname);
		908	req->ptr1 = SvPVbyte_nolen (req->sv1);
		909
		910	REQ_SEND;
		911	}
		912
		913	void
		914	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		915	ALIAS:
		916	aio_link = EIO_LINK
		917	aio_symlink = EIO_SYMLINK
		918	aio_rename = EIO_RENAME
		919	PPCODE:
		920	{
		921	dREQ;
		922
		923	req->type = ix;
		924	req->sv1 = newSVsv (oldpath);
		925	req->ptr1 = SvPVbyte_nolen (req->sv1);
		926	req->sv2 = newSVsv (newpath);
		927	req->ptr2 = SvPVbyte_nolen (req->sv2);
		928
		929	REQ_SEND;
		930	}
		931
		932	void
		933	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		934	PPCODE:
		935	{
		936	dREQ;
		937
		938	req->type = EIO_MKNOD;
		939	req->sv1 = newSVsv (pathname);
		940	req->ptr1 = SvPVbyte_nolen (req->sv1);
		941	req->int2 = (mode_t)mode;
		942	req->offs = dev;
		943
		944	REQ_SEND;
		945	}
		946
		947	void
		948	aio_busy (double delay, SV *callback=&PL_sv_undef)
		949	PPCODE:
		950	{
		951	dREQ;
		952
		953	req->type = EIO_BUSY;
		954	req->nv1 = delay < 0. ? 0. : delay;
		955
		956	REQ_SEND;
		957	}
		958
		959	void
		960	aio_group (SV *callback=&PL_sv_undef)
		961	PROTOTYPE: ;$
		962	PPCODE:
		963	{
		964	dREQ;
		965
		966	req->type = EIO_GROUP;
		967
		968	req_submit (req);
		969	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		970	}
		971
		972	void
		973	aio_nop (SV *callback=&PL_sv_undef)
		974	ALIAS:
		975	aio_nop = EIO_NOP
		976	aio_sync = EIO_SYNC
		977	PPCODE:
		978	{
		979	dREQ;
		980
		981	req->type = ix;
		982
		983	REQ_SEND;
		984	}
		985
		986	int
		987	aioreq_pri (int pri = 0)
		988	PROTOTYPE: ;$
		989	CODE:
		990	RETVAL = next_pri;
		991	if (items > 0)
		992	{
		993	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		994	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		995	next_pri = pri;
		996	}
		997	OUTPUT:
		998	RETVAL
		999
		1000	void
		1001	aioreq_nice (int nice = 0)
		1002	CODE:
		1003	nice = next_pri - nice;
		1004	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1005	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1006	next_pri = nice;
		1007
		1008	void
		1009	flush ()
		1010	PROTOTYPE:
		1011	CODE:
		1012	while (eio_nreqs ())
360	{	1013	{
361	poll_wait ();	1014	poll_wait ();
362	poll_cb ();	1015	poll_cb ();
363	}	1016	}
364	}
365		1017
366	int	1018	int
367	max_outstanding(nreqs)
368	int nreqs
369	PROTOTYPE: $
370	CODE:
371	RETVAL = max_outstanding;
372	max_outstanding = nreqs;
373
374	void
375	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
376	SV * pathname
377	int flags
378	int mode
379	SV * callback
380	PROTOTYPE: $$$;$
381	CODE:
382	{
383	aio_req req;
384
385	Newz (0, req, 1, aio_cb);
386
387	if (!req)
388	croak ("out of memory during aio_req allocation");
389
390	req->type = REQ_OPEN;
391	req->data = newSVsv (pathname);
392	req->dataptr = SvPV_nolen (req->data);
393	req->fd = flags;
394	req->mode = mode;
395	req->callback = SvREFCNT_inc (callback);
396
397	send_req (req);
398	}
399
400	void
401	aio_close(fh,callback=&PL_sv_undef)
402	SV * fh
403	SV * callback
404	PROTOTYPE: $;$
405	ALIAS:
406	aio_close = REQ_CLOSE
407	aio_fsync = REQ_FSYNC
408	aio_fdatasync = REQ_FDATASYNC
409	CODE:
410	{
411	aio_req req;
412
413	Newz (0, req, 1, aio_cb);
414
415	if (!req)
416	croak ("out of memory during aio_req allocation");
417
418	req->type = ix;
419	req->fh = newSVsv (fh);
420	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
421	req->callback = SvREFCNT_inc (callback);
422
423	send_req (req);
424	}
425
426	void
427	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
428	SV * fh
429	UV offset
430	IV length
431	SV * data
432	IV dataoffset
433	SV * callback
434	ALIAS:
435	aio_read = REQ_READ
436	aio_write = REQ_WRITE
437	PROTOTYPE: $$$$$;$
438	CODE:
439	{
440	aio_req req;
441	STRLEN svlen;
442	char *svptr = SvPV (data, svlen);
443
444	SvUPGRADE (data, SVt_PV);
445	SvPOK_on (data);
446
447	if (dataoffset < 0)
448	dataoffset += svlen;
449
450	if (dataoffset < 0 || dataoffset > svlen)
451	croak ("data offset outside of string");
452
453	if (ix == REQ_WRITE)
454	{
455	/* write: check length and adjust. */
456	if (length < 0 || length + dataoffset > svlen)
457	length = svlen - dataoffset;
458	}
459	else
460	{
461	/* read: grow scalar as necessary */
462	svptr = SvGROW (data, length + dataoffset);
463	}
464
465	if (length < 0)
466	croak ("length must not be negative");
467
468	Newz (0, req, 1, aio_cb);
469
470	if (!req)
471	croak ("out of memory during aio_req allocation");
472
473	req->type = ix;
474	req->fh = newSVsv (fh);
475	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
476	: IoOFP (sv_2io (fh)));
477	req->offset = offset;
478	req->length = length;
479	req->data = SvREFCNT_inc (data);
480	req->dataptr = (char *)svptr + dataoffset;
481	req->callback = SvREFCNT_inc (callback);
482
483	send_req (req);
484	}
485
486	void
487	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
488	SV * fh
489	UV offset
490	IV length
491	SV * callback
492	PROTOTYPE: $$$;$
493	CODE:
494	{
495	aio_req req;
496
497	if (length < 0)
498	croak ("length must not be negative");
499
500	Newz (0, req, 1, aio_cb);
501
502	if (!req)
503	croak ("out of memory during aio_req allocation");
504
505	req->type = REQ_READAHEAD;
506	req->fh = newSVsv (fh);
507	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
508	req->offset = offset;
509	req->length = length;
510	req->callback = SvREFCNT_inc (callback);
511
512	send_req (req);
513	}
514
515	void
516	aio_stat(fh_or_path,callback=&PL_sv_undef)
517	SV * fh_or_path
518	SV * callback
519	ALIAS:
520	aio_stat = REQ_STAT
521	aio_lstat = REQ_LSTAT
522	CODE:
523	{
524	aio_req req;
525
526	Newz (0, req, 1, aio_cb);
527
528	if (!req)
529	croak ("out of memory during aio_req allocation");
530
531	New (0, req->statdata, 1, Stat_t);
532
533	if (!req->statdata)
534	croak ("out of memory during aio_req->statdata allocation");
535
536	if (SvPOK (fh_or_path))
537	{
538	req->type = ix;
539	req->data = newSVsv (fh_or_path);
540	req->dataptr = SvPV_nolen (req->data);
541	}
542	else
543	{
544	req->type = REQ_FSTAT;
545	req->fh = newSVsv (fh_or_path);
546	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
547	}
548
549	req->callback = SvREFCNT_inc (callback);
550
551	send_req (req);
552	}
553
554	void
555	aio_unlink(pathname,callback=&PL_sv_undef)
556	SV * pathname
557	SV * callback
558	CODE:
559	{
560	aio_req req;
561
562	Newz (0, req, 1, aio_cb);
563
564	if (!req)
565	croak ("out of memory during aio_req allocation");
566
567	req->type = REQ_UNLINK;
568	req->data = newSVsv (pathname);
569	req->dataptr = SvPV_nolen (req->data);
570	req->callback = SvREFCNT_inc (callback);
571
572	send_req (req);
573	}
574
575	void
576	flush()
577	PROTOTYPE:
578	CODE:
579	while (nreqs)
580	{
581	poll_wait ();
582	poll_cb ();
583	}
584
585	void
586	poll()	1019	poll()
587	PROTOTYPE:	1020	PROTOTYPE:
588	CODE:	1021	CODE:
589	if (nreqs)
590	{
591	poll_wait ();	1022	poll_wait ();
592	poll_cb ();	1023	RETVAL = poll_cb ();
593	}	1024	OUTPUT:
		1025	RETVAL
594		1026
595	int	1027	int
596	poll_fileno()	1028	poll_fileno()
597	PROTOTYPE:	1029	PROTOTYPE:
598	CODE:	1030	CODE:
…		…
610		1042
611	void	1043	void
612	poll_wait()	1044	poll_wait()
613	PROTOTYPE:	1045	PROTOTYPE:
614	CODE:	1046	CODE:
615	if (nreqs)
616	poll_wait ();	1047	poll_wait ();
617		1048
618	int	1049	int
619	nreqs()	1050	nreqs()
620	PROTOTYPE:	1051	PROTOTYPE:
621	CODE:	1052	CODE:
622	RETVAL = nreqs;	1053	RETVAL = eio_nreqs ();
623	OUTPUT:	1054	OUTPUT:
624	RETVAL	1055	RETVAL
625		1056
		1057	int
		1058	nready()
		1059	PROTOTYPE:
		1060	CODE:
		1061	RETVAL = eio_nready ();
		1062	OUTPUT:
		1063	RETVAL
		1064
		1065	int
		1066	npending()
		1067	PROTOTYPE:
		1068	CODE:
		1069	RETVAL = eio_npending ();
		1070	OUTPUT:
		1071	RETVAL
		1072
		1073	int
		1074	nthreads()
		1075	PROTOTYPE:
		1076	CODE:
		1077	RETVAL = eio_nthreads ();
		1078	OUTPUT:
		1079	RETVAL
		1080
		1081	void _on_next_submit (SV *cb)
		1082	CODE:
		1083	SvREFCNT_dec (on_next_submit);
		1084	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1085
		1086	PROTOTYPES: DISABLE
		1087
		1088	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1089
		1090	void
		1091	cancel (aio_req_ornot req)
		1092	CODE:
		1093	eio_cancel (req);
		1094
		1095	void
		1096	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1097	PPCODE:
		1098	{
		1099	if (GIMME_V != G_VOID)
		1100	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1101
		1102	if (items > 1)
		1103	{
		1104	SV *cb_cv = get_cb (callback);
		1105
		1106	SvREFCNT_dec (req->callback);
		1107	req->callback = SvREFCNT_inc (cb_cv);
		1108	}
		1109	}
		1110
		1111	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1112
		1113	void
		1114	add (aio_req grp, ...)
		1115	PPCODE:
		1116	{
		1117	int i;
		1118
		1119	if (grp->int1 == 2)
		1120	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1121
		1122	for (i = 1; i < items; ++i )
		1123	{
		1124	aio_req req;
		1125
		1126	if (GIMME_V != G_VOID)
		1127	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1128
		1129	req = SvAIO_REQ (ST (i));
		1130
		1131	if (req)
		1132	eio_grp_add (grp, req);
		1133	}
		1134	}
		1135
		1136	void
		1137	cancel_subs (aio_req_ornot req)
		1138	CODE:
		1139	req_cancel_subs (req);
		1140
		1141	void
		1142	result (aio_req grp, ...)
		1143	CODE:
		1144	{
		1145	int i;
		1146	AV *av;
		1147
		1148	grp->errorno = errno;
		1149
		1150	av = newAV ();
		1151
		1152	for (i = 1; i < items; ++i )
		1153	av_push (av, newSVsv (ST (i)));
		1154
		1155	SvREFCNT_dec (grp->sv1);
		1156	grp->sv1 = (SV *)av;
		1157	}
		1158
		1159	void
		1160	errno (aio_req grp, int errorno = errno)
		1161	CODE:
		1162	grp->errorno = errorno;
		1163
		1164	void
		1165	limit (aio_req grp, int limit)
		1166	CODE:
		1167	eio_grp_limit (grp, limit);
		1168
		1169	void
		1170	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1171	CODE:
		1172	{
		1173	SvREFCNT_dec (grp->sv2);
		1174	grp->sv2 = newSVsv (callback);
		1175	grp->feed = aio_grp_feed;
		1176
		1177	if (grp->int2 <= 0)
		1178	grp->int2 = 2;
		1179
		1180	eio_grp_limit (grp, grp->int2);
		1181	}
		1182

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