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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.7 by root, Mon Jul 11 01:49:14 2005 UTC vs.
Revision 1.133 by root, Wed Oct 22 18:15:36 2008 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	#include <endian.h>
12		17
13	#include <pthread.h>	18	/* perl namespace pollution */
14	#include <sys/syscall.h>	19	#undef VERSION
15		20
16	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	#ifdef _WIN32
17	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
18	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
19		22
20	#if __ia64	23	# define EIO_STRUCT_DIRENT Direntry_t
21	# 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
22	#else	59	#else
23	# 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
24	#endif	68	#endif
25		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
26	enum {	119	enum {
27	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
28	REQ_OPEN, REQ_CLOSE,
29	REQ_READ, REQ_WRITE, REQ_READAHEAD,
30	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
31	REQ_FSYNC, REQ_FDATASYNC,
32	};	121	};
33		122
34	typedef struct aio_cb {	123	#include "libeio/eio.c"
35	struct aio_cb *volatile next;
36		124
37	int type;
38
39	int fd;
40	off_t offset;
41	size_t length;
42	ssize_t result;
43	mode_t mode; /* open */
44	int errorno;
45	SV *data, *callback;
46	void *dataptr;
47	STRLEN dataoffset;
48
49	Stat_t *statdata;
50	} aio_cb;
51
52	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
53		127
54	static int started;	128	static SV *on_next_submit;
55	static int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
56	static int max_outstanding = 1<<30;	130	static int max_outstanding;
57	static int respipe [2];
58		131
59	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
60	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
61	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62		133
63	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
64	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	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		318	*SvEND (req->sv2) = 0;
		319	PUSHs (sv_2mortal (newSViv (req->result)));
		320	break;
		321
		322	case EIO_DUP2:
		323	if (req->result > 0)
		324	req->result = 0;
		325	/* FALLTHROUGH */
		326
		327	default:
		328	PUSHs (sv_2mortal (newSViv (req->result)));
		329	break;
		330	}
		331
		332	errno = req->errorno;
		333
		334	PUTBACK;
		335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		336	SPAGAIN;
		337
		338	FREETMPS;
		339	LEAVE;
		340
		341	PUTBACK;
		342	}
		343
		344	return !!SvTRUE (ERRSV);
		345	}
		346
		347	static void req_destroy (aio_req req)
		348	{
		349	if (req->self)
		350	{
		351	sv_unmagic (req->self, PERL_MAGIC_ext);
		352	SvREFCNT_dec (req->self);
		353	}
		354
		355	SvREFCNT_dec (req->sv1);
		356	SvREFCNT_dec (req->sv2);
		357	SvREFCNT_dec (req->callback);
		358
		359	Safefree (req);
		360	}
		361
		362	static void req_cancel_subs (aio_req grp)
		363	{
		364	aio_req sub;
		365
		366	if (grp->type != EIO_GROUP)
		367	return;
		368
		369	SvREFCNT_dec (grp->sv2);
		370	grp->sv2 = 0;
		371
		372	eio_grp_cancel (grp);
		373	}
		374
		375	#ifdef USE_SOCKETS_AS_HANDLES
		376	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		377	#else
		378	# define TO_SOCKET(x) (x)
		379	#endif
65		380
66	static void	381	static void
67	poll_wait ()	382	create_respipe (void)
68	{	383	{
69	if (!nreqs)	384	int old_readfd = respipe [0];
70	return;
71		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	{
72	fd_set rfd;	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
73	FD_ZERO(&rfd);	436	FD_ZERO (&rfd);
74	FD_SET(respipe [0], &rfd);	437	FD_SET (respipe [0], &rfd);
75		438
76	select (respipe [0] + 1, &rfd, 0, 0, 0);	439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
77	}
78
79	static int
80	poll_cb ()
81	{
82	dSP;
83	int count = 0;
84	aio_req req;
85
86	{
87	/* read and signals sent by the worker threads */
88	char buf [32];
89	while (read (respipe [0], buf, 32) > 0)
90	;
91	}	440	}
		441	}
92		442
		443	static int poll_cb (void)
		444	{
93	for (;;)	445	for (;;)
94	{	446	{
95	pthread_mutex_lock (&reslock);	447	int res = eio_poll ();
96		448
97	req = ress;
98
99	if (ress)	449	if (res > 0)
100	{
101	ress = ress->next;
102	if (!ress) rese = 0;
103	}
104
105	pthread_mutex_unlock (&reslock);
106
107	if (!req)
108	break;	450	croak (0);
109		451
110	nreqs--;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
111		454
112	if (req->type == REQ_QUIT)	455	poll_wait ();
113	started--;
114	else
115	{
116	int errorno = errno;
117	errno = req->errorno;
118
119	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset
121	+ req->result > 0 ? req->result : 0);
122
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127	{
128	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129	PL_laststatval = req->result;
130	PL_statcache = *(req->statdata);
131
132	Safefree (req->statdata);
133	}
134
135	PUSHMARK (SP);
136	XPUSHs (sv_2mortal (newSViv (req->result)));
137
138	if (req->type == REQ_OPEN)
139	{
140	/* convert fd to fh */
141	SV *fh;
142
143	PUTBACK;
144	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
145	SPAGAIN;
146
147	fh = POPs;
148
149	PUSHMARK (SP);
150	XPUSHs (fh);
151	}
152
153	PUTBACK;
154	call_sv (req->callback, G_VOID | G_EVAL);
155	SPAGAIN;
156
157	if (req->callback)
158	SvREFCNT_dec (req->callback);
159
160	errno = errorno;
161	count++;
162	}
163
164	Safefree (req);
165	}	456	}
166
167	return count;
168	}	457	}
169		458
170	static void *aio_proc(void *arg);	459	static void atfork_child (void)
171
172	static void
173	start_thread (void)
174	{	460	{
175	sigset_t fullsigset, oldsigset;	461	create_respipe ();
176	pthread_t tid;
177	pthread_attr_t attr;
178
179	pthread_attr_init (&attr);
180	pthread_attr_setstacksize (&attr, STACKSIZE);
181	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
182
183	sigfillset (&fullsigset);
184	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
185
186	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
187	started++;
188
189	sigprocmask (SIG_SETMASK, &oldsigset, 0);
190	}	462	}
191		463
192	static void	464	static SV *
193	send_req (aio_req req)	465	get_cb (SV *cb_sv)
194	{	466	{
195	nreqs++;	467	HV *st;
		468	GV *gvp;
		469	CV *cv;
196		470
197	pthread_mutex_lock (&reqlock);	471	if (!SvOK (cb_sv))
		472	return 0;
198		473
199	req->next = 0;	474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
200		475
201	if (reqe)	476	if (!cv)
202	{	477	croak ("IO::AIO callback must be undef or a CODE reference");
203	reqe->next = req;
204	reqe = req;
205	}
206	else
207	reqe = reqs = req;
208		478
209	pthread_cond_signal (&reqwait);	479	return (SV *)cv;
210	pthread_mutex_unlock (&reqlock);
211
212	while (nreqs > max_outstanding)
213	{
214	poll_wait ();
215	poll_cb ();
216	}
217	}	480	}
218		481
219	static void	482	#define dREQ \
220	end_thread (void)	483	SV *cb_cv; \
221	{
222	aio_req req;	484	aio_req req; \
223	New (0, req, 1, aio_cb);	485	int req_pri = next_pri; \
224	req->type = REQ_QUIT;	486	next_pri = EIO_PRI_DEFAULT; \
225		487	\
226	send_req (req);	488	cb_cv = get_cb (callback); \
227	}	489	\
228
229	static void
230	read_write (int dowrite, int fd, off_t offset, size_t length,
231	SV *data, STRLEN dataoffset, SV *callback)
232	{
233	aio_req req;
234	STRLEN svlen;
235	char *svptr = SvPV (data, svlen);
236
237	SvUPGRADE (data, SVt_PV);
238	SvPOK_on (data);
239
240	if (dataoffset < 0)
241	dataoffset += svlen;
242
243	if (dataoffset < 0 || dataoffset > svlen)
244	croak ("data offset outside of string");
245
246	if (dowrite)
247	{
248	/* write: check length and adjust. */
249	if (length < 0 || length + dataoffset > svlen)
250	length = svlen - dataoffset;
251	}
252	else
253	{
254	/* read: grow scalar as necessary */
255	svptr = SvGROW (data, length + dataoffset);
256	}
257
258	if (length < 0)
259	croak ("length must not be negative");
260
261	Newz (0, req, 1, aio_cb);	490	Newz (0, req, 1, eio_req); \
262		491	if (!req) \
263	if (!req)
264	croak ("out of memory during aio_req allocation");	492	croak ("out of memory during eio_req allocation"); \
265		493	\
266	req->type = dowrite ? REQ_WRITE : REQ_READ;
267	req->fd = fd;
268	req->offset = offset;
269	req->length = length;
270	req->data = SvREFCNT_inc (data);
271	req->dataptr = (char *)svptr + dataoffset;
272	req->callback = SvREFCNT_inc (callback);	494	req->callback = SvREFCNT_inc (cb_cv); \
		495	req->pri = req_pri
273		496
274	send_req (req);	497	#define REQ_SEND \
275	}	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	MODULE = IO::AIO PACKAGE = IO::AIO
276		506
277	static void *	507	PROTOTYPES: ENABLE
278	aio_proc (void *thr_arg)
279	{
280	aio_req req;
281	int type;
282		508
283	do	509	BOOT:
284	{	510	{
285	pthread_mutex_lock (&reqlock);	511	stash = gv_stashpv ("IO::AIO", 1);
286		512
287	for (;;)	513	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
288	{	514	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
289	req = reqs;	515	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
290		516	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
291	if (reqs)	517	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
292	{	518	#ifndef _WIN32
293	reqs = reqs->next;	519	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
294	if (!reqs) reqe = 0;
295	}
296
297	if (req)
298	break;
299
300	pthread_cond_wait (&reqwait, &reqlock);
301	}
302
303	pthread_mutex_unlock (&reqlock);
304
305	errno = 0; /* strictly unnecessary */
306
307	type = req->type;
308
309	switch (type)
310	{
311	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
312	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
313	#if SYS_readahead
314	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
315	#else
316	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
317	#endif	520	#endif
		521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		522	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		523	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		524	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
318		525
319	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	526	create_respipe ();
320	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
321	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
322		527
323	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	528	if (eio_init (want_poll, done_poll) < 0)
324	case REQ_CLOSE: req->result = close (req->fd); break;	529	croak ("IO::AIO: unable to initialise eio library");
325	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
326		530
327	case REQ_FSYNC: req->result = fsync (req->fd); break;	531	/* atfork child called in fifo order, so before eio's handler */
328	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	532	X_THREAD_ATFORK (0, 0, atfork_child);
329
330	case REQ_QUIT:
331	break;
332
333	default:
334	req->result = ENOSYS;
335	break;
336	}
337
338	req->errorno = errno;
339
340	pthread_mutex_lock (&reslock);
341
342	req->next = 0;
343
344	if (rese)
345	{
346	rese->next = req;
347	rese = req;
348	}
349	else
350	{
351	rese = ress = req;
352
353	/* write a dummy byte to the pipe so fh becomes ready */
354	write (respipe [1], &respipe, 1);
355	}
356
357	pthread_mutex_unlock (&reslock);
358	}
359	while (type != REQ_QUIT);
360
361	return 0;
362	}	533	}
363		534
364	MODULE = IO::AIO PACKAGE = IO::AIO
365
366	BOOT:
367	{
368	if (pipe (respipe))
369	croak ("unable to initialize result pipe");
370
371	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
372	croak ("cannot set result pipe to nonblocking mode");
373
374	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
375	croak ("cannot set result pipe to nonblocking mode");
376	}
377
378	void	535	void
379	min_parallel(nthreads)	536	max_poll_reqs (int nreqs)
380	int nthreads
381	PROTOTYPE: $	537	PROTOTYPE: $
382	CODE:	538	CODE:
383	while (nthreads > started)	539	eio_set_max_poll_reqs (nreqs);
384	start_thread ();
385		540
386	void	541	void
387	max_parallel(nthreads)	542	max_poll_time (double nseconds)
388	int nthreads
389	PROTOTYPE: $	543	PROTOTYPE: $
390	CODE:	544	CODE:
		545	eio_set_max_poll_time (nseconds);
		546
		547	void
		548	min_parallel (int nthreads)
		549	PROTOTYPE: $
		550	CODE:
		551	eio_set_min_parallel (nthreads);
		552
		553	void
		554	max_parallel (int nthreads)
		555	PROTOTYPE: $
		556	CODE:
		557	eio_set_max_parallel (nthreads);
		558
		559	void
		560	max_idle (int nthreads)
		561	PROTOTYPE: $
		562	CODE:
		563	eio_set_max_idle (nthreads);
		564
		565	void
		566	max_outstanding (int maxreqs)
		567	PROTOTYPE: $
		568	CODE:
		569	max_outstanding = maxreqs;
		570
		571	void
		572	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		573	PROTOTYPE: $$$;$
		574	PPCODE:
391	{	575	{
392	int cur = started;	576	dREQ;
393	while (cur > nthreads)	577
394	{	578	req->type = EIO_OPEN;
395	end_thread ();	579	req->sv1 = newSVsv (pathname);
		580	req->ptr1 = SvPVbyte_nolen (req->sv1);
		581	req->int1 = flags;
		582	req->int2 = mode;
		583
		584	REQ_SEND;
		585	}
		586
		587	void
		588	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		589	PROTOTYPE: $;$
		590	ALIAS:
		591	aio_fsync = EIO_FSYNC
		592	aio_fdatasync = EIO_FDATASYNC
		593	PPCODE:
		594	{
		595	dREQ;
		596
		597	req->type = ix;
		598	req->sv1 = newSVsv (fh);
		599	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		600
		601	REQ_SEND (req);
		602	}
		603
		604	void
		605	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		606	PROTOTYPE: $$$$;$
		607	PPCODE:
		608	{
		609	dREQ;
		610
		611	req->type = EIO_SYNC_FILE_RANGE;
		612	req->sv1 = newSVsv (fh);
		613	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		614	req->offs = SvVAL64 (offset);
		615	req->size = SvVAL64 (nbytes);
		616	req->int2 = flags;
		617
		618	REQ_SEND (req);
		619	}
		620
		621	void
		622	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		623	PROTOTYPE: $;$
		624	PPCODE:
		625	{
		626	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		627	dREQ;
		628
		629	if (close_pipe < 0)
		630	{
		631	int pipefd [2];
		632
		633	if (pipe (pipefd) < 0
		634	|| close (pipefd [1]) < 0
		635	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		636	abort (); /*D*/
		637
		638	close_pipe = pipefd [0];
		639	}
		640
		641	req->type = EIO_DUP2;
		642	req->int1 = close_pipe;
		643	req->sv2 = newSVsv (fh);
		644	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		645
		646	REQ_SEND (req);
		647	}
		648
		649	void
		650	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		651	ALIAS:
		652	aio_read = EIO_READ
		653	aio_write = EIO_WRITE
		654	PROTOTYPE: $$$$$;$
		655	PPCODE:
		656	{
		657	STRLEN svlen;
		658	char *svptr = SvPVbyte (data, svlen);
		659	UV len = SvUV (length);
		660
		661	SvUPGRADE (data, SVt_PV);
		662	SvPOK_on (data);
		663
		664	if (dataoffset < 0)
		665	dataoffset += svlen;
		666
		667	if (dataoffset < 0 || dataoffset > svlen)
		668	croak ("dataoffset outside of data scalar");
		669
		670	if (ix == EIO_WRITE)
		671	{
		672	/* write: check length and adjust. */
		673	if (!SvOK (length) || len + dataoffset > svlen)
		674	len = svlen - dataoffset;
		675	}
		676	else
		677	{
		678	/* read: grow scalar as necessary */
		679	svptr = SvGROW (data, len + dataoffset + 1);
		680	}
		681
		682	if (len < 0)
		683	croak ("length must not be negative");
		684
		685	{
		686	dREQ;
		687
		688	req->type = ix;
		689	req->sv1 = newSVsv (fh);
		690	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		691	: IoOFP (sv_2io (fh)));
		692	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		693	req->size = len;
		694	req->sv2 = SvREFCNT_inc (data);
		695	req->ptr2 = (char *)svptr + dataoffset;
		696	req->stroffset = dataoffset;
		697
		698	if (!SvREADONLY (data))
396	cur--;	699	{
		700	SvREADONLY_on (data);
		701	req->flags |= FLAG_SV2_RO_OFF;
397	}	702	}
398		703
399	while (started > nthreads)	704	REQ_SEND;
		705	}
		706	}
		707
		708	void
		709	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		710	PROTOTYPE: $$;$
		711	PPCODE:
		712	{
		713	SV *data;
		714	dREQ;
		715
		716	req->type = EIO_READLINK;
		717	req->sv1 = newSVsv (path);
		718	req->ptr1 = SvPVbyte_nolen (req->sv1);
		719
		720	REQ_SEND;
		721	}
		722
		723	void
		724	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		725	PROTOTYPE: $$$$;$
		726	PPCODE:
		727	{
		728	dREQ;
		729
		730	req->type = EIO_SENDFILE;
		731	req->sv1 = newSVsv (out_fh);
		732	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		733	req->sv2 = newSVsv (in_fh);
		734	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		735	req->offs = SvVAL64 (in_offset);
		736	req->size = length;
		737
		738	REQ_SEND;
		739	}
		740
		741	void
		742	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		743	PROTOTYPE: $$$;$
		744	PPCODE:
		745	{
		746	dREQ;
		747
		748	req->type = EIO_READAHEAD;
		749	req->sv1 = newSVsv (fh);
		750	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		751	req->offs = SvVAL64 (offset);
		752	req->size = length;
		753
		754	REQ_SEND;
		755	}
		756
		757	void
		758	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		759	ALIAS:
		760	aio_stat = EIO_STAT
		761	aio_lstat = EIO_LSTAT
		762	PPCODE:
		763	{
		764	dREQ;
		765
		766	req->sv1 = newSVsv (fh_or_path);
		767
		768	if (SvPOK (req->sv1))
		769	{
		770	req->type = ix;
		771	req->ptr1 = SvPVbyte_nolen (req->sv1);
		772	}
		773	else
		774	{
		775	req->type = EIO_FSTAT;
		776	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		777	}
		778
		779	REQ_SEND;
		780	}
		781
		782	void
		783	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		784	PPCODE:
		785	{
		786	dREQ;
		787
		788	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		789	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		790	req->sv1 = newSVsv (fh_or_path);
		791
		792	if (SvPOK (req->sv1))
		793	{
		794	req->type = EIO_UTIME;
		795	req->ptr1 = SvPVbyte_nolen (req->sv1);
		796	}
		797	else
		798	{
		799	req->type = EIO_FUTIME;
		800	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		801	}
		802
		803	REQ_SEND;
		804	}
		805
		806	void
		807	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		808	PPCODE:
		809	{
		810	dREQ;
		811
		812	req->sv1 = newSVsv (fh_or_path);
		813	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		814
		815	if (SvPOK (req->sv1))
		816	{
		817	req->type = EIO_TRUNCATE;
		818	req->ptr1 = SvPVbyte_nolen (req->sv1);
		819	}
		820	else
		821	{
		822	req->type = EIO_FTRUNCATE;
		823	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		824	}
		825
		826	REQ_SEND;
		827	}
		828
		829	void
		830	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		831	ALIAS:
		832	aio_chmod = EIO_CHMOD
		833	aio_mkdir = EIO_MKDIR
		834	PPCODE:
		835	{
		836	dREQ;
		837
		838	req->int2 = mode;
		839	req->sv1 = newSVsv (fh_or_path);
		840
		841	if (SvPOK (req->sv1))
		842	{
		843	req->type = ix;
		844	req->ptr1 = SvPVbyte_nolen (req->sv1);
		845	}
		846	else
		847	{
		848	req->type = EIO_FCHMOD;
		849	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		850	}
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		857	PPCODE:
		858	{
		859	dREQ;
		860
		861	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		862	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		863	req->sv1 = newSVsv (fh_or_path);
		864
		865	if (SvPOK (req->sv1))
		866	{
		867	req->type = EIO_CHOWN;
		868	req->ptr1 = SvPVbyte_nolen (req->sv1);
		869	}
		870	else
		871	{
		872	req->type = EIO_FCHOWN;
		873	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		874	}
		875
		876	REQ_SEND;
		877	}
		878
		879	void
		880	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		881	ALIAS:
		882	aio_unlink = EIO_UNLINK
		883	aio_rmdir = EIO_RMDIR
		884	aio_readdir = EIO_READDIR
		885	PPCODE:
		886	{
		887	dREQ;
		888
		889	req->type = ix;
		890	req->sv1 = newSVsv (pathname);
		891	req->ptr1 = SvPVbyte_nolen (req->sv1);
		892
		893	REQ_SEND;
		894	}
		895
		896	void
		897	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		898	ALIAS:
		899	aio_link = EIO_LINK
		900	aio_symlink = EIO_SYMLINK
		901	aio_rename = EIO_RENAME
		902	PPCODE:
		903	{
		904	dREQ;
		905
		906	req->type = ix;
		907	req->sv1 = newSVsv (oldpath);
		908	req->ptr1 = SvPVbyte_nolen (req->sv1);
		909	req->sv2 = newSVsv (newpath);
		910	req->ptr2 = SvPVbyte_nolen (req->sv2);
		911
		912	REQ_SEND;
		913	}
		914
		915	void
		916	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		917	PPCODE:
		918	{
		919	dREQ;
		920
		921	req->type = EIO_MKNOD;
		922	req->sv1 = newSVsv (pathname);
		923	req->ptr1 = SvPVbyte_nolen (req->sv1);
		924	req->int2 = (mode_t)mode;
		925	req->offs = dev;
		926
		927	REQ_SEND;
		928	}
		929
		930	void
		931	aio_busy (double delay, SV *callback=&PL_sv_undef)
		932	PPCODE:
		933	{
		934	dREQ;
		935
		936	req->type = EIO_BUSY;
		937	req->nv1 = delay < 0. ? 0. : delay;
		938
		939	REQ_SEND;
		940	}
		941
		942	void
		943	aio_group (SV *callback=&PL_sv_undef)
		944	PROTOTYPE: ;$
		945	PPCODE:
		946	{
		947	dREQ;
		948
		949	req->type = EIO_GROUP;
		950
		951	req_submit (req);
		952	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		953	}
		954
		955	void
		956	aio_nop (SV *callback=&PL_sv_undef)
		957	ALIAS:
		958	aio_nop = EIO_NOP
		959	aio_sync = EIO_SYNC
		960	PPCODE:
		961	{
		962	dREQ;
		963
		964	req->type = ix;
		965
		966	REQ_SEND;
		967	}
		968
		969	int
		970	aioreq_pri (int pri = 0)
		971	PROTOTYPE: ;$
		972	CODE:
		973	RETVAL = next_pri;
		974	if (items > 0)
		975	{
		976	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		977	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		978	next_pri = pri;
		979	}
		980	OUTPUT:
		981	RETVAL
		982
		983	void
		984	aioreq_nice (int nice = 0)
		985	CODE:
		986	nice = next_pri - nice;
		987	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		988	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		989	next_pri = nice;
		990
		991	void
		992	flush ()
		993	PROTOTYPE:
		994	CODE:
		995	while (eio_nreqs ())
400	{	996	{
401	poll_wait ();	997	poll_wait ();
402	poll_cb ();	998	poll_cb ();
403	}	999	}
404	}
405		1000
406	int	1001	int
407	max_outstanding(nreqs)
408	int nreqs
409	PROTOTYPE: $
410	CODE:
411	RETVAL = max_outstanding;
412	max_outstanding = nreqs;
413
414	void
415	aio_open(pathname,flags,mode,callback)
416	SV * pathname
417	int flags
418	int mode
419	SV * callback
420	PROTOTYPE: $$$$
421	CODE:
422	{
423	aio_req req;
424
425	Newz (0, req, 1, aio_cb);
426
427	if (!req)
428	croak ("out of memory during aio_req allocation");
429
430	req->type = REQ_OPEN;
431	req->data = newSVsv (pathname);
432	req->dataptr = SvPV_nolen (req->data);
433	req->fd = flags;
434	req->mode = mode;
435	req->callback = SvREFCNT_inc (callback);
436
437	send_req (req);
438	}
439
440	void
441	aio_close(fh,callback)
442	InputStream fh
443	SV * callback
444	PROTOTYPE: $$
445	ALIAS:
446	aio_close = REQ_CLOSE
447	aio_fsync = REQ_FSYNC
448	aio_fdatasync = REQ_FDATASYNC
449	CODE:
450	{
451	aio_req req;
452
453	Newz (0, req, 1, aio_cb);
454
455	if (!req)
456	croak ("out of memory during aio_req allocation");
457
458	req->type = ix;
459	req->fd = PerlIO_fileno (fh);
460	req->callback = SvREFCNT_inc (callback);
461
462	send_req (req);
463	}
464
465	void
466	aio_read(fh,offset,length,data,dataoffset,callback)
467	InputStream fh
468	UV offset
469	IV length
470	SV * data
471	IV dataoffset
472	SV * callback
473	PROTOTYPE: $$$$$$
474	CODE:
475	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
476
477	void
478	aio_write(fh,offset,length,data,dataoffset,callback)
479	OutputStream fh
480	UV offset
481	IV length
482	SV * data
483	IV dataoffset
484	SV * callback
485	PROTOTYPE: $$$$$$
486	CODE:
487	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
488
489	void
490	aio_readahead(fh,offset,length,callback)
491	InputStream fh
492	UV offset
493	IV length
494	SV * callback
495	PROTOTYPE: $$$$
496	CODE:
497	{
498	aio_req req;
499
500	if (length < 0)
501	croak ("length must not be negative");
502
503	Newz (0, req, 1, aio_cb);
504
505	if (!req)
506	croak ("out of memory during aio_req allocation");
507
508	req->type = REQ_READAHEAD;
509	req->fd = PerlIO_fileno (fh);
510	req->offset = offset;
511	req->length = length;
512	req->callback = SvREFCNT_inc (callback);
513
514	send_req (req);
515	}
516
517	void
518	aio_stat(fh_or_path,callback)
519	SV * fh_or_path
520	SV * callback
521	PROTOTYPE: $$
522	ALIAS:
523	aio_lstat = 1
524	CODE:
525	{
526	aio_req req;
527
528	Newz (0, req, 1, aio_cb);
529
530	if (!req)
531	croak ("out of memory during aio_req allocation");
532
533	New (0, req->statdata, 1, Stat_t);
534
535	if (!req->statdata)
536	croak ("out of memory during aio_req->statdata allocation");
537
538	if (SvPOK (fh_or_path))
539	{
540	req->type = ix ? REQ_LSTAT : REQ_STAT;
541	req->data = newSVsv (fh_or_path);
542	req->dataptr = SvPV_nolen (req->data);
543	}
544	else
545	{
546	req->type = REQ_FSTAT;
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)
557	SV * pathname
558	SV * callback
559	PROTOTYPE: $$
560	CODE:
561	{
562	aio_req req;
563
564	Newz (0, req, 1, aio_cb);
565
566	if (!req)
567	croak ("out of memory during aio_req allocation");
568
569	req->type = REQ_UNLINK;
570	req->data = newSVsv (pathname);
571	req->dataptr = SvPV_nolen (req->data);
572	req->callback = SvREFCNT_inc (callback);
573
574	send_req (req);
575	}
576
577	void
578	flush()
579	PROTOTYPE:
580	CODE:
581	while (nreqs)
582	{
583	poll_wait ();
584	poll_cb ();
585	}
586
587	void
588	poll()	1002	poll()
589	PROTOTYPE:	1003	PROTOTYPE:
590	CODE:	1004	CODE:
591	if (nreqs)
592	{
593	poll_wait ();	1005	poll_wait ();
594	poll_cb ();	1006	RETVAL = poll_cb ();
595	}	1007	OUTPUT:
		1008	RETVAL
596		1009
597	int	1010	int
598	poll_fileno()	1011	poll_fileno()
599	PROTOTYPE:	1012	PROTOTYPE:
600	CODE:	1013	CODE:
…		…
612		1025
613	void	1026	void
614	poll_wait()	1027	poll_wait()
615	PROTOTYPE:	1028	PROTOTYPE:
616	CODE:	1029	CODE:
617	if (nreqs)
618	poll_wait ();	1030	poll_wait ();
619		1031
620	int	1032	int
621	nreqs()	1033	nreqs()
622	PROTOTYPE:	1034	PROTOTYPE:
623	CODE:	1035	CODE:
624	RETVAL = nreqs;	1036	RETVAL = eio_nreqs ();
625	OUTPUT:	1037	OUTPUT:
626	RETVAL	1038	RETVAL
627		1039
		1040	int
		1041	nready()
		1042	PROTOTYPE:
		1043	CODE:
		1044	RETVAL = eio_nready ();
		1045	OUTPUT:
		1046	RETVAL
		1047
		1048	int
		1049	npending()
		1050	PROTOTYPE:
		1051	CODE:
		1052	RETVAL = eio_npending ();
		1053	OUTPUT:
		1054	RETVAL
		1055
		1056	int
		1057	nthreads()
		1058	PROTOTYPE:
		1059	CODE:
		1060	RETVAL = eio_nthreads ();
		1061	OUTPUT:
		1062	RETVAL
		1063
		1064	void _on_next_submit (SV *cb)
		1065	CODE:
		1066	SvREFCNT_dec (on_next_submit);
		1067	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1068
		1069	PROTOTYPES: DISABLE
		1070
		1071	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1072
		1073	void
		1074	cancel (aio_req_ornot req)
		1075	CODE:
		1076	eio_cancel (req);
		1077
		1078	void
		1079	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1080	PPCODE:
		1081	{
		1082	if (GIMME_V != G_VOID)
		1083	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1084
		1085	if (items > 1)
		1086	{
		1087	SV *cb_cv = get_cb (callback);
		1088
		1089	SvREFCNT_dec (req->callback);
		1090	req->callback = SvREFCNT_inc (cb_cv);
		1091	}
		1092	}
		1093
		1094	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1095
		1096	void
		1097	add (aio_req grp, ...)
		1098	PPCODE:
		1099	{
		1100	int i;
		1101
		1102	if (grp->int1 == 2)
		1103	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1104
		1105	for (i = 1; i < items; ++i )
		1106	{
		1107	aio_req req;
		1108
		1109	if (GIMME_V != G_VOID)
		1110	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1111
		1112	req = SvAIO_REQ (ST (i));
		1113
		1114	if (req)
		1115	eio_grp_add (grp, req);
		1116	}
		1117	}
		1118
		1119	void
		1120	cancel_subs (aio_req_ornot req)
		1121	CODE:
		1122	req_cancel_subs (req);
		1123
		1124	void
		1125	result (aio_req grp, ...)
		1126	CODE:
		1127	{
		1128	int i;
		1129	AV *av;
		1130
		1131	grp->errorno = errno;
		1132
		1133	av = newAV ();
		1134
		1135	for (i = 1; i < items; ++i )
		1136	av_push (av, newSVsv (ST (i)));
		1137
		1138	SvREFCNT_dec (grp->sv1);
		1139	grp->sv1 = (SV *)av;
		1140	}
		1141
		1142	void
		1143	errno (aio_req grp, int errorno = errno)
		1144	CODE:
		1145	grp->errorno = errorno;
		1146
		1147	void
		1148	limit (aio_req grp, int limit)
		1149	CODE:
		1150	eio_grp_limit (grp, limit);
		1151
		1152	void
		1153	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1154	CODE:
		1155	{
		1156	SvREFCNT_dec (grp->sv2);
		1157	grp->sv2 = newSVsv (callback);
		1158	grp->feed = aio_grp_feed;
		1159
		1160	if (grp->int2 <= 0)
		1161	grp->int2 = 2;
		1162
		1163	eio_grp_limit (grp, grp->int2);
		1164	}
		1165

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