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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.15 by root, Sat Jul 23 18:19:56 2005 UTC vs.
Revision 1.136 by root, Sun Apr 19 13:15:55 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
8	#include <unistd.h>	14	#include <limits.h>
9	#include <fcntl.h>	15	#include <fcntl.h>
10	#include <signal.h>
11	#include <sched.h>	16	#include <sched.h>
12	#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>
13	#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
14	#endif	68	#endif
15		69
16	#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
17		75
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	76	#define EIO_STRUCT_STAT Stat_t
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		77
22	#if __ia64	78	/* use NV for 32 bit perls as it allows larger offsets */
23	# define STACKSIZE 65536	79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
24	#else	81	#else
25	# define STACKSIZE 4096	82	# define SvVAL64 SvNV
26	#endif	83	#endif
27		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
28	enum {	119	enum {
29	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
30	REQ_OPEN, REQ_CLOSE,
31	REQ_READ, REQ_WRITE, REQ_READAHEAD,
32	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
33	REQ_FSYNC, REQ_FDATASYNC,
34	};	121	};
35		122
36	typedef struct aio_cb {	123	#include "libeio/eio.c"
37	struct aio_cb *volatile next;
38		124
39	int type;
40
41	int fd;
42	off_t offset;
43	size_t length;
44	ssize_t result;
45	mode_t mode; /* open */
46	int errorno;
47	SV *data, *callback, *fh;
48	void *dataptr;
49	STRLEN dataoffset;
50
51	Stat_t *statdata;
52	} aio_cb;
53
54	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
55		127
56	static int started;	128	static SV *on_next_submit;
57	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
58	static int max_outstanding = 1<<30;	130	static int max_outstanding;
59	static int respipe [2];
60		131
61	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
62	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
63	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
64		133
65	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
66	static volatile aio_req ress, rese; /* queue start, queue end */	135	static void req_cancel (aio_req req);
67		136
68	static void	137	static void want_poll (void)
69	poll_wait ()
70	{	138	{
71	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)
72	{	155	{
73	fd_set rfd;	156	req->self = (SV *)newHV ();
74	FD_ZERO(&rfd);	157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
75	FD_SET(respipe [0], &rfd);
76
77	select (respipe [0] + 1, &rfd, 0, 0, 0);
78	}	158	}
79	}
80		159
81	static int	160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
82	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)
83	{	211	{
84	dSP;	212	dSP;
85	int count = 0;
86	aio_req req, prv;
87		213
88	pthread_mutex_lock (&reslock);	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
89		216
90	{	217	if (!EIO_CANCELLED (req) && req->callback)
91	/* read any signals sent by the worker threads */
92	char buf [32];
93	while (read (respipe [0], buf, 32) > 0)
94	;
95	}
96
97	req = ress;
98	ress = rese = 0;
99
100	pthread_mutex_unlock (&reslock);
101
102	while (req)
103	{	218	{
104	nreqs--;	219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
105		223
106	if (req->type == REQ_QUIT)	224	switch (req->type)
107	started--;
108	else
109	{	225	{
110	int errorno = errno;	226	case EIO_READDIR:
111	errno = req->errorno;
112
113	if (req->type == REQ_READ)
114	SvCUR_set (req->data, req->dataoffset
115	+ req->result > 0 ? req->result : 0);
116
117	if (req->data)
118	SvREFCNT_dec (req->data);
119
120	if (req->fh)
121	SvREFCNT_dec (req->fh);
122
123	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
124	{	227	{
125	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	228	SV *rv = &PL_sv_undef;
126	PL_laststatval = req->result;
127	PL_statcache = *(req->statdata);
128		229
129	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);
130	}	250	}
		251	break;
131		252
132	ENTER;	253	case EIO_OPEN:
133	PUSHMARK (SP);
134	XPUSHs (sv_2mortal (newSViv (req->result)));
135
136	if (req->type == REQ_OPEN)
137	{	254	{
138	/* convert fd to fh */	255	/* convert fd to fh */
139	SV *fh;	256	SV *fh = &PL_sv_undef;
140		257
141	PUTBACK;	258	if (req->result >= 0)
142	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	259	{
143	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);
144		267
145	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	);
146		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
147	PUSHMARK (SP);	280	PUSHs (fh);
148	XPUSHs (sv_2mortal (fh));
149	}	281	}
150
151	if (SvOK (req->callback))
152	{
153	PUTBACK;
154	call_sv (req->callback, G_VOID | G_EVAL);
155	SPAGAIN;
156	}
157
158	LEAVE;
159
160	if (req->callback)
161	SvREFCNT_dec (req->callback);
162
163	errno = errorno;
164	count++;
165	}
166
167	prv = req;
168	req = req->next;
169	Safefree (prv);
170
171	/* TODO: croak on errors? */
172	}
173
174	return count;
175	}
176
177	static void *aio_proc(void *arg);
178
179	static void
180	start_thread (void)
181	{
182	sigset_t fullsigset, oldsigset;
183	pthread_t tid;
184	pthread_attr_t attr;
185
186	pthread_attr_init (&attr);
187	pthread_attr_setstacksize (&attr, STACKSIZE);
188	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
189
190	sigfillset (&fullsigset);
191	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
192
193	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
194	started++;
195
196	sigprocmask (SIG_SETMASK, &oldsigset, 0);
197	}
198
199	static void
200	send_req (aio_req req)
201	{
202	nreqs++;
203
204	pthread_mutex_lock (&reqlock);
205
206	req->next = 0;
207
208	if (reqe)
209	{
210	reqe->next = req;
211	reqe = req;
212	}
213	else
214	reqe = reqs = req;
215
216	pthread_cond_signal (&reqwait);
217	pthread_mutex_unlock (&reqlock);
218
219	while (nreqs > max_outstanding)
220	{
221	poll_wait ();
222	poll_cb ();
223	}
224	}
225
226	static void
227	end_thread (void)
228	{
229	aio_req req;
230	New (0, req, 1, aio_cb);
231	req->type = REQ_QUIT;
232
233	send_req (req);
234	}
235
236	static void *
237	aio_proc (void *thr_arg)
238	{
239	aio_req req;
240	int type;
241
242	do
243	{
244	pthread_mutex_lock (&reqlock);
245
246	for (;;)
247	{
248	req = reqs;
249
250	if (reqs)
251	{
252	reqs = reqs->next;
253	if (!reqs) reqe = 0;
254	}
255
256	if (req)
257	break;	282	break;
258		283
259	pthread_cond_wait (&reqwait, &reqlock);	284	case EIO_GROUP:
260	}	285	req->int1 = 2; /* mark group as finished */
261		286
262	pthread_mutex_unlock (&reqlock);	287	if (req->sv1)
263
264	errno = 0; /* strictly unnecessary */
265
266	type = req->type;
267
268	switch (type)
269	{	288	{
270	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	289	int i;
271	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	290	AV *av = (AV *)req->sv1;
272	#if SYS_readahead
273	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
274	#else
275	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
276	#endif
277		291
278	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	292	EXTEND (SP, AvFILL (av) + 1);
279	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	293	for (i = 0; i <= AvFILL (av); ++i)
280	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	294	PUSHs (*av_fetch (av, i, 0));
281		295	}
282	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
283	case REQ_CLOSE: req->result = close (req->fd); break;
284	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
285
286	case REQ_FSYNC: req->result = fsync (req->fd); break;
287	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
288
289	case REQ_QUIT:
290	break;	296	break;
291		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
292	default:	327	default:
293	req->result = ENOSYS;	328	PUSHs (sv_2mortal (newSViv (req->result)));
294	break;	329	break;
295	}	330	}
296		331
297	req->errorno = errno;	332	errno = req->errorno;
298		333
299	pthread_mutex_lock (&reslock);	334	PUTBACK;
		335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		336	SPAGAIN;
300		337
301	req->next = 0;	338	FREETMPS;
		339	LEAVE;
302		340
303	if (rese)	341	PUTBACK;
304	{
305	rese->next = req;
306	rese = req;
307	}
308	else
309	{
310	rese = ress = req;
311
312	/* write a dummy byte to the pipe so fh becomes ready */
313	write (respipe [1], &respipe, 1);
314	}
315
316	pthread_mutex_unlock (&reslock);
317	}	342	}
318	while (type != REQ_QUIT);
319		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
		380
		381	static void
		382	create_respipe (void)
		383	{
		384	int old_readfd = respipe [0];
		385
		386	if (respipe [1] >= 0)
		387	respipe_close (TO_SOCKET (respipe [1]));
		388
		389	#ifdef _WIN32
		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");
		395
		396	if (old_readfd >= 0)
		397	{
		398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		399	croak ("unable to initialize result pipe(2)");
		400
		401	respipe_close (respipe [0]);
		402	respipe [0] = old_readfd;
		403	}
		404
		405	#ifdef _WIN32
		406	int arg = 1;
		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)");
		414
		415	respipe_osf [0] = TO_SOCKET (respipe [0]);
		416	respipe_osf [1] = TO_SOCKET (respipe [1]);
		417	}
		418
		419	static void poll_wait (void)
		420	{
		421	fd_set rfd;
		422
		423	while (eio_nreqs ())
		424	{
		425	int size;
		426
		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);
		440	}
		441	}
		442
		443	static int poll_cb (void)
		444	{
		445	for (;;)
		446	{
		447	int res = eio_poll ();
		448
		449	if (res > 0)
		450	croak (0);
		451
		452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
		454
		455	poll_wait ();
		456	}
		457	}
		458
		459	static void atfork_child (void)
		460	{
		461	create_respipe ();
		462	}
		463
		464	static SV *
		465	get_cb (SV *cb_sv)
		466	{
		467	HV *st;
		468	GV *gvp;
		469	CV *cv;
		470
		471	if (!SvOK (cb_sv))
320	return 0;	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; \
		484	aio_req req; \
		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
		496
		497	#define REQ_SEND \
		498	PUTBACK; \
		499	req_submit (req); \
		500	SPAGAIN; \
		501	\
		502	if (GIMME_V != G_VOID) \
		503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		504
		505	static int
		506	extract_fd (SV *fh, int wr)
		507	{
		508	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		509
		510	if (fd < 0)
		511	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		512
		513	return fd;
321	}	514	}
322		515
323	MODULE = IO::AIO PACKAGE = IO::AIO	516	MODULE = IO::AIO PACKAGE = IO::AIO
324		517
325	PROTOTYPES: ENABLE	518	PROTOTYPES: ENABLE
326		519
327	BOOT:	520	BOOT:
328	{	521	{
329	if (pipe (respipe))	522	stash = gv_stashpv ("IO::AIO", 1);
330	croak ("unable to initialize result pipe");
331		523
332	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	524	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
333	croak ("cannot set result pipe to nonblocking mode");	525	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		526	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		527	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		528	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		529	#ifndef _WIN32
		530	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		531	#endif
		532	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		533	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		534	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		535	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
334		536
335	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	537	create_respipe ();
336	croak ("cannot set result pipe to nonblocking mode");
337	}
338		538
		539	if (eio_init (want_poll, done_poll) < 0)
		540	croak ("IO::AIO: unable to initialise eio library");
		541
		542	/* atfork child called in fifo order, so before eio's handler */
		543	X_THREAD_ATFORK (0, 0, atfork_child);
		544	}
		545
339	void	546	void
340	min_parallel(nthreads)	547	max_poll_reqs (int nreqs)
341	int nthreads
342	PROTOTYPE: $	548	PROTOTYPE: $
343	CODE:	549	CODE:
344	while (nthreads > started)	550	eio_set_max_poll_reqs (nreqs);
345	start_thread ();
346		551
347	void	552	void
348	max_parallel(nthreads)	553	max_poll_time (double nseconds)
349	int nthreads
350	PROTOTYPE: $	554	PROTOTYPE: $
351	CODE:	555	CODE:
		556	eio_set_max_poll_time (nseconds);
		557
		558	void
		559	min_parallel (int nthreads)
		560	PROTOTYPE: $
		561	CODE:
		562	eio_set_min_parallel (nthreads);
		563
		564	void
		565	max_parallel (int nthreads)
		566	PROTOTYPE: $
		567	CODE:
		568	eio_set_max_parallel (nthreads);
		569
		570	void
		571	max_idle (int nthreads)
		572	PROTOTYPE: $
		573	CODE:
		574	eio_set_max_idle (nthreads);
		575
		576	void
		577	max_outstanding (int maxreqs)
		578	PROTOTYPE: $
		579	CODE:
		580	max_outstanding = maxreqs;
		581
		582	void
		583	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		584	PROTOTYPE: $$$;$
		585	PPCODE:
352	{	586	{
353	int cur = started;	587	dREQ;
354	while (cur > nthreads)	588
355	{	589	req->type = EIO_OPEN;
356	end_thread ();	590	req->sv1 = newSVsv (pathname);
		591	req->ptr1 = SvPVbyte_nolen (req->sv1);
		592	req->int1 = flags;
		593	req->int2 = mode;
		594
		595	REQ_SEND;
		596	}
		597
		598	void
		599	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		600	PROTOTYPE: $;$
		601	ALIAS:
		602	aio_fsync = EIO_FSYNC
		603	aio_fdatasync = EIO_FDATASYNC
		604	PPCODE:
		605	{
		606	int fd = extract_fd (fh, 0);
		607	dREQ;
		608
		609	req->type = ix;
		610	req->sv1 = newSVsv (fh);
		611	req->int1 = fd;
		612
		613	REQ_SEND (req);
		614	}
		615
		616	void
		617	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		618	PROTOTYPE: $$$$;$
		619	PPCODE:
		620	{
		621	int fd = extract_fd (fh, 0);
		622	dREQ;
		623
		624	req->type = EIO_SYNC_FILE_RANGE;
		625	req->sv1 = newSVsv (fh);
		626	req->int1 = fd;
		627	req->offs = SvVAL64 (offset);
		628	req->size = SvVAL64 (nbytes);
		629	req->int2 = flags;
		630
		631	REQ_SEND (req);
		632	}
		633
		634	void
		635	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		636	PROTOTYPE: $;$
		637	PPCODE:
		638	{
		639	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		640	int fd = extract_fd (fh, 0);
		641	dREQ;
		642
		643	if (close_pipe < 0)
		644	{
		645	int pipefd [2];
		646
		647	if (pipe (pipefd) < 0
		648	|| close (pipefd [1]) < 0
		649	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		650	abort (); /*D*/
		651
		652	close_pipe = pipefd [0];
		653	}
		654
		655	req->type = EIO_DUP2;
		656	req->int1 = close_pipe;
		657	req->sv2 = newSVsv (fh);
		658	req->int2 = fd;
		659
		660	REQ_SEND (req);
		661	}
		662
		663	void
		664	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		665	ALIAS:
		666	aio_read = EIO_READ
		667	aio_write = EIO_WRITE
		668	PROTOTYPE: $$$$$;$
		669	PPCODE:
		670	{
		671	STRLEN svlen;
		672	char *svptr = SvPVbyte (data, svlen);
		673	UV len = SvUV (length);
		674	int fd;
		675
		676	if (SvTYPE (data) > SVt_PVMG)
		677	croak ("illegal data argument '%s', must be plain scalar string", SvPV_nolen (data));
		678
		679	SvUPGRADE (data, SVt_PV);
		680	SvPOK_only (data);
		681
		682	if (dataoffset < 0)
		683	dataoffset += svlen;
		684
		685	if (dataoffset < 0 || dataoffset > svlen)
		686	croak ("dataoffset outside of data scalar");
		687
		688	if (ix == EIO_WRITE)
		689	{
		690	/* write: check length and adjust. */
		691	if (!SvOK (length) || len + dataoffset > svlen)
		692	len = svlen - dataoffset;
		693	}
		694	else
		695	{
		696	/* read: grow scalar as necessary */
		697	svptr = SvGROW (data, len + dataoffset + 1);
		698	}
		699
		700	if (len < 0)
		701	croak ("length must not be negative");
		702
		703	fd = extract_fd (fh, ix == EIO_WRITE);
		704
		705	{
		706	dREQ;
		707
		708	req->type = ix;
		709	req->sv1 = newSVsv (fh);
		710	req->int1 = fd;
		711	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		712	req->size = len;
		713	req->sv2 = SvREFCNT_inc (data);
		714	req->ptr2 = (char *)svptr + dataoffset;
		715	req->stroffset = dataoffset;
		716
		717	if (!SvREADONLY (data))
357	cur--;	718	{
		719	SvREADONLY_on (data);
		720	req->flags |= FLAG_SV2_RO_OFF;
358	}	721	}
359		722
360	while (started > nthreads)	723	REQ_SEND;
		724	}
		725	}
		726
		727	void
		728	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		729	PROTOTYPE: $$;$
		730	PPCODE:
		731	{
		732	SV *data;
		733	dREQ;
		734
		735	req->type = EIO_READLINK;
		736	req->sv1 = newSVsv (path);
		737	req->ptr1 = SvPVbyte_nolen (req->sv1);
		738
		739	REQ_SEND;
		740	}
		741
		742	void
		743	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		744	PROTOTYPE: $$$$;$
		745	PPCODE:
		746	{
		747	int ifd = extract_fd (in_fh , 0);
		748	int ofd = extract_fd (out_fh, 0);
		749	dREQ;
		750
		751	req->type = EIO_SENDFILE;
		752	req->sv1 = newSVsv (out_fh);
		753	req->int1 = ofd;
		754	req->sv2 = newSVsv (in_fh);
		755	req->int2 = ifd;
		756	req->offs = SvVAL64 (in_offset);
		757	req->size = length;
		758
		759	REQ_SEND;
		760	}
		761
		762	void
		763	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		764	PROTOTYPE: $$$;$
		765	PPCODE:
		766	{
		767	int fd = extract_fd (fh, 0);
		768	dREQ;
		769
		770	req->type = EIO_READAHEAD;
		771	req->sv1 = newSVsv (fh);
		772	req->int1 = fd;
		773	req->offs = SvVAL64 (offset);
		774	req->size = length;
		775
		776	REQ_SEND;
		777	}
		778
		779	void
		780	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		781	ALIAS:
		782	aio_stat = EIO_STAT
		783	aio_lstat = EIO_LSTAT
		784	PPCODE:
		785	{
		786	dREQ;
		787
		788	req->sv1 = newSVsv (fh_or_path);
		789
		790	if (SvPOK (req->sv1))
		791	{
		792	req->type = ix;
		793	req->ptr1 = SvPVbyte_nolen (req->sv1);
		794	}
		795	else
		796	{
		797	req->type = EIO_FSTAT;
		798	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		799	}
		800
		801	REQ_SEND;
		802	}
		803
		804	void
		805	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		806	PPCODE:
		807	{
		808	dREQ;
		809
		810	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		811	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		812	req->sv1 = newSVsv (fh_or_path);
		813
		814	if (SvPOK (req->sv1))
		815	{
		816	req->type = EIO_UTIME;
		817	req->ptr1 = SvPVbyte_nolen (req->sv1);
		818	}
		819	else
		820	{
		821	req->type = EIO_FUTIME;
		822	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		823	}
		824
		825	REQ_SEND;
		826	}
		827
		828	void
		829	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		830	PPCODE:
		831	{
		832	dREQ;
		833
		834	req->sv1 = newSVsv (fh_or_path);
		835	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		836
		837	if (SvPOK (req->sv1))
		838	{
		839	req->type = EIO_TRUNCATE;
		840	req->ptr1 = SvPVbyte_nolen (req->sv1);
		841	}
		842	else
		843	{
		844	req->type = EIO_FTRUNCATE;
		845	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		846	}
		847
		848	REQ_SEND;
		849	}
		850
		851	void
		852	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		853	ALIAS:
		854	aio_chmod = EIO_CHMOD
		855	aio_mkdir = EIO_MKDIR
		856	PPCODE:
		857	{
		858	dREQ;
		859
		860	req->int2 = mode;
		861	req->sv1 = newSVsv (fh_or_path);
		862
		863	if (SvPOK (req->sv1))
		864	{
		865	req->type = ix;
		866	req->ptr1 = SvPVbyte_nolen (req->sv1);
		867	}
		868	else
		869	{
		870	req->type = EIO_FCHMOD;
		871	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		872	}
		873
		874	REQ_SEND;
		875	}
		876
		877	void
		878	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		879	PPCODE:
		880	{
		881	dREQ;
		882
		883	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		884	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		885	req->sv1 = newSVsv (fh_or_path);
		886
		887	if (SvPOK (req->sv1))
		888	{
		889	req->type = EIO_CHOWN;
		890	req->ptr1 = SvPVbyte_nolen (req->sv1);
		891	}
		892	else
		893	{
		894	req->type = EIO_FCHOWN;
		895	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		896	}
		897
		898	REQ_SEND;
		899	}
		900
		901	void
		902	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		903	ALIAS:
		904	aio_unlink = EIO_UNLINK
		905	aio_rmdir = EIO_RMDIR
		906	aio_readdir = EIO_READDIR
		907	PPCODE:
		908	{
		909	dREQ;
		910
		911	req->type = ix;
		912	req->sv1 = newSVsv (pathname);
		913	req->ptr1 = SvPVbyte_nolen (req->sv1);
		914
		915	REQ_SEND;
		916	}
		917
		918	void
		919	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		920	ALIAS:
		921	aio_link = EIO_LINK
		922	aio_symlink = EIO_SYMLINK
		923	aio_rename = EIO_RENAME
		924	PPCODE:
		925	{
		926	dREQ;
		927
		928	req->type = ix;
		929	req->sv1 = newSVsv (oldpath);
		930	req->ptr1 = SvPVbyte_nolen (req->sv1);
		931	req->sv2 = newSVsv (newpath);
		932	req->ptr2 = SvPVbyte_nolen (req->sv2);
		933
		934	REQ_SEND;
		935	}
		936
		937	void
		938	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		939	PPCODE:
		940	{
		941	dREQ;
		942
		943	req->type = EIO_MKNOD;
		944	req->sv1 = newSVsv (pathname);
		945	req->ptr1 = SvPVbyte_nolen (req->sv1);
		946	req->int2 = (mode_t)mode;
		947	req->offs = dev;
		948
		949	REQ_SEND;
		950	}
		951
		952	void
		953	aio_busy (double delay, SV *callback=&PL_sv_undef)
		954	PPCODE:
		955	{
		956	dREQ;
		957
		958	req->type = EIO_BUSY;
		959	req->nv1 = delay < 0. ? 0. : delay;
		960
		961	REQ_SEND;
		962	}
		963
		964	void
		965	aio_group (SV *callback=&PL_sv_undef)
		966	PROTOTYPE: ;$
		967	PPCODE:
		968	{
		969	dREQ;
		970
		971	req->type = EIO_GROUP;
		972
		973	req_submit (req);
		974	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		975	}
		976
		977	void
		978	aio_nop (SV *callback=&PL_sv_undef)
		979	ALIAS:
		980	aio_nop = EIO_NOP
		981	aio_sync = EIO_SYNC
		982	PPCODE:
		983	{
		984	dREQ;
		985
		986	req->type = ix;
		987
		988	REQ_SEND;
		989	}
		990
		991	int
		992	aioreq_pri (int pri = 0)
		993	PROTOTYPE: ;$
		994	CODE:
		995	RETVAL = next_pri;
		996	if (items > 0)
		997	{
		998	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		999	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1000	next_pri = pri;
		1001	}
		1002	OUTPUT:
		1003	RETVAL
		1004
		1005	void
		1006	aioreq_nice (int nice = 0)
		1007	CODE:
		1008	nice = next_pri - nice;
		1009	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1010	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1011	next_pri = nice;
		1012
		1013	void
		1014	flush ()
		1015	PROTOTYPE:
		1016	CODE:
		1017	while (eio_nreqs ())
361	{	1018	{
362	poll_wait ();	1019	poll_wait ();
363	poll_cb ();	1020	poll_cb ();
364	}	1021	}
365	}
366		1022
367	int	1023	int
368	max_outstanding(nreqs)
369	int nreqs
370	PROTOTYPE: $
371	CODE:
372	RETVAL = max_outstanding;
373	max_outstanding = nreqs;
374
375	void
376	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
377	SV * pathname
378	int flags
379	int mode
380	SV * callback
381	PROTOTYPE: $$$;$
382	CODE:
383	{
384	aio_req req;
385
386	Newz (0, req, 1, aio_cb);
387
388	if (!req)
389	croak ("out of memory during aio_req allocation");
390
391	req->type = REQ_OPEN;
392	req->data = newSVsv (pathname);
393	req->dataptr = SvPV_nolen (req->data);
394	req->fd = flags;
395	req->mode = mode;
396	req->callback = SvREFCNT_inc (callback);
397
398	send_req (req);
399	}
400
401	void
402	aio_close(fh,callback=&PL_sv_undef)
403	SV * fh
404	SV * callback
405	PROTOTYPE: $;$
406	ALIAS:
407	aio_close = REQ_CLOSE
408	aio_fsync = REQ_FSYNC
409	aio_fdatasync = REQ_FDATASYNC
410	CODE:
411	{
412	aio_req req;
413
414	Newz (0, req, 1, aio_cb);
415
416	if (!req)
417	croak ("out of memory during aio_req allocation");
418
419	req->type = ix;
420	req->fh = newSVsv (fh);
421	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
422	req->callback = SvREFCNT_inc (callback);
423
424	send_req (req);
425	}
426
427	void
428	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
429	SV * fh
430	UV offset
431	IV length
432	SV * data
433	IV dataoffset
434	SV * callback
435	ALIAS:
436	aio_read = REQ_READ
437	aio_write = REQ_WRITE
438	PROTOTYPE: $$$$$;$
439	CODE:
440	{
441	aio_req req;
442	STRLEN svlen;
443	char *svptr = SvPV (data, svlen);
444
445	SvUPGRADE (data, SVt_PV);
446	SvPOK_on (data);
447
448	if (dataoffset < 0)
449	dataoffset += svlen;
450
451	if (dataoffset < 0 || dataoffset > svlen)
452	croak ("data offset outside of string");
453
454	if (ix == REQ_WRITE)
455	{
456	/* write: check length and adjust. */
457	if (length < 0 || length + dataoffset > svlen)
458	length = svlen - dataoffset;
459	}
460	else
461	{
462	/* read: grow scalar as necessary */
463	svptr = SvGROW (data, length + dataoffset);
464	}
465
466	if (length < 0)
467	croak ("length must not be negative");
468
469	Newz (0, req, 1, aio_cb);
470
471	if (!req)
472	croak ("out of memory during aio_req allocation");
473
474	req->type = ix;
475	req->fh = newSVsv (fh);
476	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
477	: IoOFP (sv_2io (fh)));
478	req->offset = offset;
479	req->length = length;
480	req->data = SvREFCNT_inc (data);
481	req->dataptr = (char *)svptr + dataoffset;
482	req->callback = SvREFCNT_inc (callback);
483
484	send_req (req);
485	}
486
487	void
488	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
489	SV * fh
490	UV offset
491	IV length
492	SV * callback
493	PROTOTYPE: $$$;$
494	CODE:
495	{
496	aio_req req;
497
498	if (length < 0)
499	croak ("length must not be negative");
500
501	Newz (0, req, 1, aio_cb);
502
503	if (!req)
504	croak ("out of memory during aio_req allocation");
505
506	req->type = REQ_READAHEAD;
507	req->fh = newSVsv (fh);
508	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
509	req->offset = offset;
510	req->length = length;
511	req->callback = SvREFCNT_inc (callback);
512
513	send_req (req);
514	}
515
516	void
517	aio_stat(fh_or_path,callback=&PL_sv_undef)
518	SV * fh_or_path
519	SV * callback
520	ALIAS:
521	aio_stat = REQ_STAT
522	aio_lstat = REQ_LSTAT
523	CODE:
524	{
525	aio_req req;
526
527	Newz (0, req, 1, aio_cb);
528
529	if (!req)
530	croak ("out of memory during aio_req allocation");
531
532	New (0, req->statdata, 1, Stat_t);
533
534	if (!req->statdata)
535	croak ("out of memory during aio_req->statdata allocation");
536
537	if (SvPOK (fh_or_path))
538	{
539	req->type = ix;
540	req->data = newSVsv (fh_or_path);
541	req->dataptr = SvPV_nolen (req->data);
542	}
543	else
544	{
545	req->type = REQ_FSTAT;
546	req->fh = newSVsv (fh_or_path);
547	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548	}
549
550	req->callback = SvREFCNT_inc (callback);
551
552	send_req (req);
553	}
554
555	void
556	aio_unlink(pathname,callback=&PL_sv_undef)
557	SV * pathname
558	SV * callback
559	CODE:
560	{
561	aio_req req;
562
563	Newz (0, req, 1, aio_cb);
564
565	if (!req)
566	croak ("out of memory during aio_req allocation");
567
568	req->type = REQ_UNLINK;
569	req->data = newSVsv (pathname);
570	req->dataptr = SvPV_nolen (req->data);
571	req->callback = SvREFCNT_inc (callback);
572
573	send_req (req);
574	}
575
576	void
577	flush()
578	PROTOTYPE:
579	CODE:
580	while (nreqs)
581	{
582	poll_wait ();
583	poll_cb ();
584	}
585
586	void
587	poll()	1024	poll()
588	PROTOTYPE:	1025	PROTOTYPE:
589	CODE:	1026	CODE:
590	if (nreqs)
591	{
592	poll_wait ();	1027	poll_wait ();
593	poll_cb ();	1028	RETVAL = poll_cb ();
594	}	1029	OUTPUT:
		1030	RETVAL
595		1031
596	int	1032	int
597	poll_fileno()	1033	poll_fileno()
598	PROTOTYPE:	1034	PROTOTYPE:
599	CODE:	1035	CODE:
…		…
611		1047
612	void	1048	void
613	poll_wait()	1049	poll_wait()
614	PROTOTYPE:	1050	PROTOTYPE:
615	CODE:	1051	CODE:
616	if (nreqs)
617	poll_wait ();	1052	poll_wait ();
618		1053
619	int	1054	int
620	nreqs()	1055	nreqs()
621	PROTOTYPE:	1056	PROTOTYPE:
622	CODE:	1057	CODE:
623	RETVAL = nreqs;	1058	RETVAL = eio_nreqs ();
624	OUTPUT:	1059	OUTPUT:
625	RETVAL	1060	RETVAL
626		1061
		1062	int
		1063	nready()
		1064	PROTOTYPE:
		1065	CODE:
		1066	RETVAL = eio_nready ();
		1067	OUTPUT:
		1068	RETVAL
		1069
		1070	int
		1071	npending()
		1072	PROTOTYPE:
		1073	CODE:
		1074	RETVAL = eio_npending ();
		1075	OUTPUT:
		1076	RETVAL
		1077
		1078	int
		1079	nthreads()
		1080	PROTOTYPE:
		1081	CODE:
		1082	RETVAL = eio_nthreads ();
		1083	OUTPUT:
		1084	RETVAL
		1085
		1086	void _on_next_submit (SV *cb)
		1087	CODE:
		1088	SvREFCNT_dec (on_next_submit);
		1089	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1090
		1091	PROTOTYPES: DISABLE
		1092
		1093	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1094
		1095	void
		1096	cancel (aio_req_ornot req)
		1097	CODE:
		1098	eio_cancel (req);
		1099
		1100	void
		1101	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1102	PPCODE:
		1103	{
		1104	if (GIMME_V != G_VOID)
		1105	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1106
		1107	if (items > 1)
		1108	{
		1109	SV *cb_cv = get_cb (callback);
		1110
		1111	SvREFCNT_dec (req->callback);
		1112	req->callback = SvREFCNT_inc (cb_cv);
		1113	}
		1114	}
		1115
		1116	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1117
		1118	void
		1119	add (aio_req grp, ...)
		1120	PPCODE:
		1121	{
		1122	int i;
		1123
		1124	if (grp->int1 == 2)
		1125	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1126
		1127	for (i = 1; i < items; ++i )
		1128	{
		1129	aio_req req;
		1130
		1131	if (GIMME_V != G_VOID)
		1132	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1133
		1134	req = SvAIO_REQ (ST (i));
		1135
		1136	if (req)
		1137	eio_grp_add (grp, req);
		1138	}
		1139	}
		1140
		1141	void
		1142	cancel_subs (aio_req_ornot req)
		1143	CODE:
		1144	req_cancel_subs (req);
		1145
		1146	void
		1147	result (aio_req grp, ...)
		1148	CODE:
		1149	{
		1150	int i;
		1151	AV *av;
		1152
		1153	grp->errorno = errno;
		1154
		1155	av = newAV ();
		1156
		1157	for (i = 1; i < items; ++i )
		1158	av_push (av, newSVsv (ST (i)));
		1159
		1160	SvREFCNT_dec (grp->sv1);
		1161	grp->sv1 = (SV *)av;
		1162	}
		1163
		1164	void
		1165	errno (aio_req grp, int errorno = errno)
		1166	CODE:
		1167	grp->errorno = errorno;
		1168
		1169	void
		1170	limit (aio_req grp, int limit)
		1171	CODE:
		1172	eio_grp_limit (grp, limit);
		1173
		1174	void
		1175	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1176	CODE:
		1177	{
		1178	SvREFCNT_dec (grp->sv2);
		1179	grp->sv2 = newSVsv (callback);
		1180	grp->feed = aio_grp_feed;
		1181
		1182	if (grp->int2 <= 0)
		1183	grp->int2 = 2;
		1184
		1185	eio_grp_limit (grp, grp->int2);
		1186	}
		1187

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