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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.9 by root, Tue Jul 12 11:02:54 2005 UTC vs.
Revision 1.135 by root, Sun Apr 19 13:06:15 2009 UTC

		1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
		9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
5	#include <sys/types.h>	12	#include <sys/types.h>
6	#include <sys/stat.h>	13	#include <sys/stat.h>
7	#include <unistd.h>	14	#include <limits.h>
8	#include <fcntl.h>	15	#include <fcntl.h>
9	#include <signal.h>
10	#include <sched.h>	16	#include <sched.h>
11		17
12	#include <pthread.h>	18	/* perl namespace pollution */
13	#include <sys/syscall.h>	19	#undef VERSION
14		20
15	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	#ifdef _WIN32
16	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
17	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
18		22
19	#if __ia64	23	# define EIO_STRUCT_DIRENT Direntry_t
20	# define STACKSIZE 65536	24	# undef malloc
		25	# undef free
		26
		27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
21	#else	59	#else
22	# define STACKSIZE 4096	60
		61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
23	#endif	68	#endif
24		69
		70	/* perl stupidly overrides readdir and maybe others */
		71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
		83	#endif
		84
		85	/*****************************************************************************/
		86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
		91	#endif
		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	static HV *stash;
		99	typedef SV SV8; /* byte-sv, used for argument-checking */
		100
		101	#define AIO_REQ_KLASS "IO::AIO::REQ"
		102	#define AIO_GRP_KLASS "IO::AIO::GRP"
		103
		104	#define EIO_REQ_MEMBERS \
		105	SV *callback; \
		106	SV *sv1, *sv2; \
		107	STRLEN stroffset; \
		108	SV *self;
		109
		110	#define EIO_NO_WRAPPERS 1
		111
		112	#include "libeio/eio.h"
		113
		114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
		118
25	enum {	119	enum {
26	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
27	REQ_OPEN, REQ_CLOSE,
28	REQ_READ, REQ_WRITE, REQ_READAHEAD,
29	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
30	REQ_FSYNC, REQ_FDATASYNC,
31	};	121	};
32		122
33	typedef struct aio_cb {	123	#include "libeio/eio.c"
34	struct aio_cb *volatile next;
35		124
36	int type;
37
38	int fd;
39	off_t offset;
40	size_t length;
41	ssize_t result;
42	mode_t mode; /* open */
43	int errorno;
44	SV *data, *callback;
45	void *dataptr;
46	STRLEN dataoffset;
47
48	Stat_t *statdata;
49	} aio_cb;
50
51	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
52		127
53	static int started;	128	static SV *on_next_submit;
54	static int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
55	static int max_outstanding = 1<<30;	130	static int max_outstanding;
56	static int respipe [2];
57		131
58	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
59	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
60	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
61		133
62	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
63	static volatile aio_req ress, rese; /* queue start, queue end */	135	static void req_cancel (aio_req req);
		136
		137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
		150
		151	/* must be called at most once */
		152	static SV *req_sv (aio_req req, const char *klass)
		153	{
		154	if (!req->self)
		155	{
		156	req->self = (SV *)newHV ();
		157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		158	}
		159
		160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		161	}
		162
		163	static aio_req SvAIO_REQ (SV *sv)
		164	{
		165	MAGIC *mg;
		166
		167	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		168	croak ("object of class " AIO_REQ_KLASS " expected");
		169
		170	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		171
		172	return mg ? (aio_req)mg->mg_ptr : 0;
		173	}
		174
		175	static void aio_grp_feed (aio_req grp)
		176	{
		177	if (grp->sv2 && SvOK (grp->sv2))
		178	{
		179	dSP;
		180
		181	ENTER;
		182	SAVETMPS;
		183	PUSHMARK (SP);
		184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		185	PUTBACK;
		186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		187	SPAGAIN;
		188	FREETMPS;
		189	LEAVE;
		190	}
		191	}
		192
		193	static void req_submit (eio_req *req)
		194	{
		195	eio_submit (req);
		196
		197	if (expect_false (on_next_submit))
		198	{
		199	dSP;
		200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
		207	}
		208	}
		209
		210	static int req_invoke (eio_req *req)
		211	{
		212	dSP;
		213
		214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
		218	{
		219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
		223
		224	switch (req->type)
		225	{
		226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
		229
		230	if (req->result >= 0)
		231	{
		232	int i;
		233	char *buf = req->ptr2;
		234	AV *av = newAV ();
		235
		236	av_extend (av, req->result - 1);
		237
		238	for (i = 0; i < req->result; ++i)
		239	{
		240	SV *sv = newSVpv (buf, 0);
		241
		242	av_store (av, i, sv);
		243	buf += SvCUR (sv) + 1;
		244	}
		245
		246	rv = sv_2mortal (newRV_noinc ((SV *)av));
		247	}
		248
		249	PUSHs (rv);
		250	}
		251	break;
		252
		253	case EIO_OPEN:
		254	{
		255	/* convert fd to fh */
		256	SV *fh = &PL_sv_undef;
		257
		258	if (req->result >= 0)
		259	{
		260	GV *gv = (GV *)sv_newmortal ();
		261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
		267
		268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
		280	PUSHs (fh);
		281	}
		282	break;
		283
		284	case EIO_GROUP:
		285	req->int1 = 2; /* mark group as finished */
		286
		287	if (req->sv1)
		288	{
		289	int i;
		290	AV *av = (AV *)req->sv1;
		291
		292	EXTEND (SP, AvFILL (av) + 1);
		293	for (i = 0; i <= AvFILL (av); ++i)
		294	PUSHs (*av_fetch (av, i, 0));
		295	}
		296	break;
		297
		298	case EIO_NOP:
		299	case EIO_BUSY:
		300	break;
		301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	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
64		380
65	static void	381	static void
66	poll_wait ()	382	create_respipe (void)
67	{	383	{
68	if (!nreqs)	384	int old_readfd = respipe [0];
69	return;
70		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	{
71	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
72	FD_ZERO(&rfd);	436	FD_ZERO (&rfd);
73	FD_SET(respipe [0], &rfd);	437	FD_SET (respipe [0], &rfd);
74		438
75	select (respipe [0] + 1, &rfd, 0, 0, 0);	439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
76	}
77
78	static int
79	poll_cb ()
80	{
81	dSP;
82	int count = 0;
83	aio_req req;
84
85	{
86	/* read and signals sent by the worker threads */
87	char buf [32];
88	while (read (respipe [0], buf, 32) > 0)
89	;
90	}	440	}
		441	}
91		442
		443	static int poll_cb (void)
		444	{
92	for (;;)	445	for (;;)
93	{	446	{
94	pthread_mutex_lock (&reslock);	447	int res = eio_poll ();
95		448
96	req = ress;
97
98	if (ress)	449	if (res > 0)
99	{
100	ress = ress->next;
101	if (!ress) rese = 0;
102	}
103
104	pthread_mutex_unlock (&reslock);
105
106	if (!req)
107	break;	450	croak (0);
108		451
109	nreqs--;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
110		454
111	if (req->type == REQ_QUIT)	455	poll_wait ();
112	started--;
113	else
114	{
115	int errorno = errno;
116	errno = req->errorno;
117
118	if (req->type == REQ_READ)
119	SvCUR_set (req->data, req->dataoffset
120	+ req->result > 0 ? req->result : 0);
121
122	if (req->data)
123	SvREFCNT_dec (req->data);
124
125	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
126	{
127	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
128	PL_laststatval = req->result;
129	PL_statcache = *(req->statdata);
130
131	Safefree (req->statdata);
132	}
133
134	PUSHMARK (SP);
135	XPUSHs (sv_2mortal (newSViv (req->result)));
136
137	if (req->type == REQ_OPEN)
138	{
139	/* convert fd to fh */
140	SV *fh;
141
142	PUTBACK;
143	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
144	SPAGAIN;
145
146	fh = POPs;
147
148	PUSHMARK (SP);
149	XPUSHs (fh);
150	}
151
152	if (SvOK (req->callback))
153	{
154	PUTBACK;
155	call_sv (req->callback, G_VOID | G_EVAL);
156	SPAGAIN;
157	}
158
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161
162	errno = errorno;
163	count++;
164	}
165
166	Safefree (req);
167	}	456	}
168
169	return count;
170	}	457	}
171		458
172	static void *aio_proc(void *arg);	459	static void atfork_child (void)
173
174	static void
175	start_thread (void)
176	{	460	{
177	sigset_t fullsigset, oldsigset;	461	create_respipe ();
178	pthread_t tid;
179	pthread_attr_t attr;
180
181	pthread_attr_init (&attr);
182	pthread_attr_setstacksize (&attr, STACKSIZE);
183	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
184
185	sigfillset (&fullsigset);
186	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
187
188	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
189	started++;
190
191	sigprocmask (SIG_SETMASK, &oldsigset, 0);
192	}	462	}
193		463
194	static void	464	static SV *
195	send_req (aio_req req)	465	get_cb (SV *cb_sv)
196	{	466	{
197	nreqs++;	467	HV *st;
		468	GV *gvp;
		469	CV *cv;
198		470
199	pthread_mutex_lock (&reqlock);	471	if (!SvOK (cb_sv))
		472	return 0;
200		473
201	req->next = 0;	474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
202		475
203	if (reqe)	476	if (!cv)
204	{	477	croak ("IO::AIO callback must be undef or a CODE reference");
205	reqe->next = req;
206	reqe = req;
207	}
208	else
209	reqe = reqs = req;
210		478
211	pthread_cond_signal (&reqwait);	479	return (SV *)cv;
212	pthread_mutex_unlock (&reqlock);
213
214	while (nreqs > max_outstanding)
215	{
216	poll_wait ();
217	poll_cb ();
218	}
219	}	480	}
220		481
221	static void	482	#define dREQ \
222	end_thread (void)	483	SV *cb_cv; \
223	{
224	aio_req req;	484	aio_req req; \
225	New (0, req, 1, aio_cb);	485	int req_pri = next_pri; \
226	req->type = REQ_QUIT;	486	next_pri = EIO_PRI_DEFAULT; \
227		487	\
228	send_req (req);	488	cb_cv = get_cb (callback); \
229	}	489	\
230
231	static void
232	read_write (int dowrite, int fd, off_t offset, size_t length,
233	SV *data, STRLEN dataoffset, SV *callback)
234	{
235	aio_req req;
236	STRLEN svlen;
237	char *svptr = SvPV (data, svlen);
238
239	SvUPGRADE (data, SVt_PV);
240	SvPOK_on (data);
241
242	if (dataoffset < 0)
243	dataoffset += svlen;
244
245	if (dataoffset < 0 || dataoffset > svlen)
246	croak ("data offset outside of string");
247
248	if (dowrite)
249	{
250	/* write: check length and adjust. */
251	if (length < 0 || length + dataoffset > svlen)
252	length = svlen - dataoffset;
253	}
254	else
255	{
256	/* read: grow scalar as necessary */
257	svptr = SvGROW (data, length + dataoffset);
258	}
259
260	if (length < 0)
261	croak ("length must not be negative");
262
263	Newz (0, req, 1, aio_cb);	490	Newz (0, req, 1, eio_req); \
264		491	if (!req) \
265	if (!req)
266	croak ("out of memory during aio_req allocation");	492	croak ("out of memory during eio_req allocation"); \
267		493	\
268	req->type = dowrite ? REQ_WRITE : REQ_READ;
269	req->fd = fd;
270	req->offset = offset;
271	req->length = length;
272	req->data = SvREFCNT_inc (data);
273	req->dataptr = (char *)svptr + dataoffset;
274	req->callback = SvREFCNT_inc (callback);	494	req->callback = SvREFCNT_inc (cb_cv); \
		495	req->pri = req_pri
275		496
276	send_req (req);	497	#define REQ_SEND \
277	}	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
278		506
279	static void *	507	PROTOTYPES: ENABLE
280	aio_proc (void *thr_arg)
281	{
282	aio_req req;
283	int type;
284		508
285	do	509	BOOT:
286	{	510	{
287	pthread_mutex_lock (&reqlock);	511	stash = gv_stashpv ("IO::AIO", 1);
288		512
289	for (;;)	513	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
290	{	514	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
291	req = reqs;	515	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
292		516	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
293	if (reqs)	517	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
294	{	518	#ifndef _WIN32
295	reqs = reqs->next;	519	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
296	if (!reqs) reqe = 0;
297	}
298
299	if (req)
300	break;
301
302	pthread_cond_wait (&reqwait, &reqlock);
303	}
304
305	pthread_mutex_unlock (&reqlock);
306
307	errno = 0; /* strictly unnecessary */
308
309	type = req->type;
310
311	switch (type)
312	{
313	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
314	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
315	#if SYS_readahead
316	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
317	#else
318	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
319	#endif	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));
320		525
321	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	526	create_respipe ();
322	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
323	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
324		527
325	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	528	if (eio_init (want_poll, done_poll) < 0)
326	case REQ_CLOSE: req->result = close (req->fd); break;	529	croak ("IO::AIO: unable to initialise eio library");
327	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
328		530
329	case REQ_FSYNC: req->result = fsync (req->fd); break;	531	/* atfork child called in fifo order, so before eio's handler */
330	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	532	X_THREAD_ATFORK (0, 0, atfork_child);
331
332	case REQ_QUIT:
333	break;
334
335	default:
336	req->result = ENOSYS;
337	break;
338	}
339
340	req->errorno = errno;
341
342	pthread_mutex_lock (&reslock);
343
344	req->next = 0;
345
346	if (rese)
347	{
348	rese->next = req;
349	rese = req;
350	}
351	else
352	{
353	rese = ress = req;
354
355	/* write a dummy byte to the pipe so fh becomes ready */
356	write (respipe [1], &respipe, 1);
357	}
358
359	pthread_mutex_unlock (&reslock);
360	}
361	while (type != REQ_QUIT);
362
363	return 0;
364	}	533	}
365		534
366	MODULE = IO::AIO PACKAGE = IO::AIO
367
368	PROTOTYPES: ENABLE
369
370	BOOT:
371	{
372	if (pipe (respipe))
373	croak ("unable to initialize result pipe");
374
375	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
376	croak ("cannot set result pipe to nonblocking mode");
377
378	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
379	croak ("cannot set result pipe to nonblocking mode");
380	}
381
382	void	535	void
383	min_parallel(nthreads)	536	max_poll_reqs (int nreqs)
384	int nthreads
385	PROTOTYPE: $	537	PROTOTYPE: $
386	CODE:	538	CODE:
387	while (nthreads > started)	539	eio_set_max_poll_reqs (nreqs);
388	start_thread ();
389		540
390	void	541	void
391	max_parallel(nthreads)	542	max_poll_time (double nseconds)
392	int nthreads
393	PROTOTYPE: $	543	PROTOTYPE: $
394	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: $$$;$
		574	PPCODE:
395	{	575	{
396	int cur = started;	576	dREQ;
397	while (cur > nthreads)	577
398	{	578	req->type = EIO_OPEN;
399	end_thread ();	579	req->sv1 = newSVsv (pathname);
		580	req->ptr1 = SvPVbyte_nolen (req->sv1);
		581	req->int1 = flags;
		582	req->int2 = mode;
		583
		584	REQ_SEND;
		585	}
		586
		587	void
		588	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		589	PROTOTYPE: $;$
		590	ALIAS:
		591	aio_fsync = EIO_FSYNC
		592	aio_fdatasync = EIO_FDATASYNC
		593	PPCODE:
		594	{
		595	dREQ;
		596
		597	req->type = ix;
		598	req->sv1 = newSVsv (fh);
		599	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		600
		601	REQ_SEND (req);
		602	}
		603
		604	void
		605	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		606	PROTOTYPE: $$$$;$
		607	PPCODE:
		608	{
		609	dREQ;
		610
		611	req->type = EIO_SYNC_FILE_RANGE;
		612	req->sv1 = newSVsv (fh);
		613	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		614	req->offs = SvVAL64 (offset);
		615	req->size = SvVAL64 (nbytes);
		616	req->int2 = flags;
		617
		618	REQ_SEND (req);
		619	}
		620
		621	void
		622	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		623	PROTOTYPE: $;$
		624	PPCODE:
		625	{
		626	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		627	dREQ;
		628
		629	if (close_pipe < 0)
		630	{
		631	int pipefd [2];
		632
		633	if (pipe (pipefd) < 0
		634	|| close (pipefd [1]) < 0
		635	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		636	abort (); /*D*/
		637
		638	close_pipe = pipefd [0];
		639	}
		640
		641	req->type = EIO_DUP2;
		642	req->int1 = close_pipe;
		643	req->sv2 = newSVsv (fh);
		644	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		645
		646	REQ_SEND (req);
		647	}
		648
		649	void
		650	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		651	ALIAS:
		652	aio_read = EIO_READ
		653	aio_write = EIO_WRITE
		654	PROTOTYPE: $$$$$;$
		655	PPCODE:
		656	{
		657	STRLEN svlen;
		658	char *svptr = SvPVbyte (data, svlen);
		659	UV len = SvUV (length);
		660	int fd;
		661
		662	if (SvTYPE (data) > SVt_PVMG)
		663	croak ("illegal data argument '%s', must be plain scalar string", SvPV_nolen (data));
		664
		665	SvUPGRADE (data, SVt_PV);
		666	SvPOK_only (data);
		667
		668	if (dataoffset < 0)
		669	dataoffset += svlen;
		670
		671	if (dataoffset < 0 || dataoffset > svlen)
		672	croak ("dataoffset outside of data scalar");
		673
		674	if (ix == EIO_WRITE)
		675	{
		676	/* write: check length and adjust. */
		677	if (!SvOK (length) || len + dataoffset > svlen)
		678	len = svlen - dataoffset;
		679	}
		680	else
		681	{
		682	/* read: grow scalar as necessary */
		683	svptr = SvGROW (data, len + dataoffset + 1);
		684	}
		685
		686	if (len < 0)
		687	croak ("length must not be negative");
		688
		689	fd = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		690	: IoOFP (sv_2io (fh)));
		691
		692	if (fd < 0)
		693	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		694
		695	{
		696	dREQ;
		697
		698	req->type = ix;
		699	req->sv1 = newSVsv (fh);
		700	req->int1 = fd;
		701	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		702	req->size = len;
		703	req->sv2 = SvREFCNT_inc (data);
		704	req->ptr2 = (char *)svptr + dataoffset;
		705	req->stroffset = dataoffset;
		706
		707	if (!SvREADONLY (data))
400	cur--;	708	{
		709	SvREADONLY_on (data);
		710	req->flags |= FLAG_SV2_RO_OFF;
401	}	711	}
402		712
403	while (started > nthreads)	713	REQ_SEND;
		714	}
		715	}
		716
		717	void
		718	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		719	PROTOTYPE: $$;$
		720	PPCODE:
		721	{
		722	SV *data;
		723	dREQ;
		724
		725	req->type = EIO_READLINK;
		726	req->sv1 = newSVsv (path);
		727	req->ptr1 = SvPVbyte_nolen (req->sv1);
		728
		729	REQ_SEND;
		730	}
		731
		732	void
		733	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		734	PROTOTYPE: $$$$;$
		735	PPCODE:
		736	{
		737	dREQ;
		738
		739	req->type = EIO_SENDFILE;
		740	req->sv1 = newSVsv (out_fh);
		741	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		742	req->sv2 = newSVsv (in_fh);
		743	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		744	req->offs = SvVAL64 (in_offset);
		745	req->size = length;
		746
		747	REQ_SEND;
		748	}
		749
		750	void
		751	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		752	PROTOTYPE: $$$;$
		753	PPCODE:
		754	{
		755	dREQ;
		756
		757	req->type = EIO_READAHEAD;
		758	req->sv1 = newSVsv (fh);
		759	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		760	req->offs = SvVAL64 (offset);
		761	req->size = length;
		762
		763	REQ_SEND;
		764	}
		765
		766	void
		767	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		768	ALIAS:
		769	aio_stat = EIO_STAT
		770	aio_lstat = EIO_LSTAT
		771	PPCODE:
		772	{
		773	dREQ;
		774
		775	req->sv1 = newSVsv (fh_or_path);
		776
		777	if (SvPOK (req->sv1))
		778	{
		779	req->type = ix;
		780	req->ptr1 = SvPVbyte_nolen (req->sv1);
		781	}
		782	else
		783	{
		784	req->type = EIO_FSTAT;
		785	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		786	}
		787
		788	REQ_SEND;
		789	}
		790
		791	void
		792	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		793	PPCODE:
		794	{
		795	dREQ;
		796
		797	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		798	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		799	req->sv1 = newSVsv (fh_or_path);
		800
		801	if (SvPOK (req->sv1))
		802	{
		803	req->type = EIO_UTIME;
		804	req->ptr1 = SvPVbyte_nolen (req->sv1);
		805	}
		806	else
		807	{
		808	req->type = EIO_FUTIME;
		809	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		810	}
		811
		812	REQ_SEND;
		813	}
		814
		815	void
		816	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		817	PPCODE:
		818	{
		819	dREQ;
		820
		821	req->sv1 = newSVsv (fh_or_path);
		822	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		823
		824	if (SvPOK (req->sv1))
		825	{
		826	req->type = EIO_TRUNCATE;
		827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		828	}
		829	else
		830	{
		831	req->type = EIO_FTRUNCATE;
		832	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		833	}
		834
		835	REQ_SEND;
		836	}
		837
		838	void
		839	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		840	ALIAS:
		841	aio_chmod = EIO_CHMOD
		842	aio_mkdir = EIO_MKDIR
		843	PPCODE:
		844	{
		845	dREQ;
		846
		847	req->int2 = mode;
		848	req->sv1 = newSVsv (fh_or_path);
		849
		850	if (SvPOK (req->sv1))
		851	{
		852	req->type = ix;
		853	req->ptr1 = SvPVbyte_nolen (req->sv1);
		854	}
		855	else
		856	{
		857	req->type = EIO_FCHMOD;
		858	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		859	}
		860
		861	REQ_SEND;
		862	}
		863
		864	void
		865	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		866	PPCODE:
		867	{
		868	dREQ;
		869
		870	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		871	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		872	req->sv1 = newSVsv (fh_or_path);
		873
		874	if (SvPOK (req->sv1))
		875	{
		876	req->type = EIO_CHOWN;
		877	req->ptr1 = SvPVbyte_nolen (req->sv1);
		878	}
		879	else
		880	{
		881	req->type = EIO_FCHOWN;
		882	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		883	}
		884
		885	REQ_SEND;
		886	}
		887
		888	void
		889	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		890	ALIAS:
		891	aio_unlink = EIO_UNLINK
		892	aio_rmdir = EIO_RMDIR
		893	aio_readdir = EIO_READDIR
		894	PPCODE:
		895	{
		896	dREQ;
		897
		898	req->type = ix;
		899	req->sv1 = newSVsv (pathname);
		900	req->ptr1 = SvPVbyte_nolen (req->sv1);
		901
		902	REQ_SEND;
		903	}
		904
		905	void
		906	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		907	ALIAS:
		908	aio_link = EIO_LINK
		909	aio_symlink = EIO_SYMLINK
		910	aio_rename = EIO_RENAME
		911	PPCODE:
		912	{
		913	dREQ;
		914
		915	req->type = ix;
		916	req->sv1 = newSVsv (oldpath);
		917	req->ptr1 = SvPVbyte_nolen (req->sv1);
		918	req->sv2 = newSVsv (newpath);
		919	req->ptr2 = SvPVbyte_nolen (req->sv2);
		920
		921	REQ_SEND;
		922	}
		923
		924	void
		925	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		926	PPCODE:
		927	{
		928	dREQ;
		929
		930	req->type = EIO_MKNOD;
		931	req->sv1 = newSVsv (pathname);
		932	req->ptr1 = SvPVbyte_nolen (req->sv1);
		933	req->int2 = (mode_t)mode;
		934	req->offs = dev;
		935
		936	REQ_SEND;
		937	}
		938
		939	void
		940	aio_busy (double delay, SV *callback=&PL_sv_undef)
		941	PPCODE:
		942	{
		943	dREQ;
		944
		945	req->type = EIO_BUSY;
		946	req->nv1 = delay < 0. ? 0. : delay;
		947
		948	REQ_SEND;
		949	}
		950
		951	void
		952	aio_group (SV *callback=&PL_sv_undef)
		953	PROTOTYPE: ;$
		954	PPCODE:
		955	{
		956	dREQ;
		957
		958	req->type = EIO_GROUP;
		959
		960	req_submit (req);
		961	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		962	}
		963
		964	void
		965	aio_nop (SV *callback=&PL_sv_undef)
		966	ALIAS:
		967	aio_nop = EIO_NOP
		968	aio_sync = EIO_SYNC
		969	PPCODE:
		970	{
		971	dREQ;
		972
		973	req->type = ix;
		974
		975	REQ_SEND;
		976	}
		977
		978	int
		979	aioreq_pri (int pri = 0)
		980	PROTOTYPE: ;$
		981	CODE:
		982	RETVAL = next_pri;
		983	if (items > 0)
		984	{
		985	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		986	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		987	next_pri = pri;
		988	}
		989	OUTPUT:
		990	RETVAL
		991
		992	void
		993	aioreq_nice (int nice = 0)
		994	CODE:
		995	nice = next_pri - nice;
		996	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		997	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		998	next_pri = nice;
		999
		1000	void
		1001	flush ()
		1002	PROTOTYPE:
		1003	CODE:
		1004	while (eio_nreqs ())
404	{	1005	{
405	poll_wait ();	1006	poll_wait ();
406	poll_cb ();	1007	poll_cb ();
407	}	1008	}
408	}
409		1009
410	int	1010	int
411	max_outstanding(nreqs)
412	int nreqs
413	PROTOTYPE: $
414	CODE:
415	RETVAL = max_outstanding;
416	max_outstanding = nreqs;
417
418	void
419	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
420	SV * pathname
421	int flags
422	int mode
423	SV * callback
424	PROTOTYPE: $$$;$
425	CODE:
426	{
427	aio_req req;
428
429	Newz (0, req, 1, aio_cb);
430
431	if (!req)
432	croak ("out of memory during aio_req allocation");
433
434	req->type = REQ_OPEN;
435	req->data = newSVsv (pathname);
436	req->dataptr = SvPV_nolen (req->data);
437	req->fd = flags;
438	req->mode = mode;
439	req->callback = SvREFCNT_inc (callback);
440
441	send_req (req);
442	}
443
444	void
445	aio_close(fh,callback=&PL_sv_undef)
446	InputStream fh
447	SV * callback
448	PROTOTYPE: $;$
449	ALIAS:
450	aio_close = REQ_CLOSE
451	aio_fsync = REQ_FSYNC
452	aio_fdatasync = REQ_FDATASYNC
453	CODE:
454	{
455	aio_req req;
456
457	Newz (0, req, 1, aio_cb);
458
459	if (!req)
460	croak ("out of memory during aio_req allocation");
461
462	req->type = ix;
463	req->fd = PerlIO_fileno (fh);
464	req->callback = SvREFCNT_inc (callback);
465
466	send_req (req);
467	}
468
469	void
470	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
471	InputStream fh
472	UV offset
473	IV length
474	SV * data
475	IV dataoffset
476	SV * callback
477	PROTOTYPE: $$$$$;$
478	CODE:
479	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
480
481	void
482	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
483	OutputStream fh
484	UV offset
485	IV length
486	SV * data
487	IV dataoffset
488	SV * callback
489	PROTOTYPE: $$$$$;$
490	CODE:
491	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
492
493	void
494	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
495	InputStream fh
496	UV offset
497	IV length
498	SV * callback
499	PROTOTYPE: $$$;$
500	CODE:
501	{
502	aio_req req;
503
504	if (length < 0)
505	croak ("length must not be negative");
506
507	Newz (0, req, 1, aio_cb);
508
509	if (!req)
510	croak ("out of memory during aio_req allocation");
511
512	req->type = REQ_READAHEAD;
513	req->fd = PerlIO_fileno (fh);
514	req->offset = offset;
515	req->length = length;
516	req->callback = SvREFCNT_inc (callback);
517
518	send_req (req);
519	}
520
521	void
522	aio_stat(fh_or_path,callback=&PL_sv_undef)
523	SV * fh_or_path
524	SV * callback
525	ALIAS:
526	aio_stat = REQ_STAT
527	aio_lstat = REQ_LSTAT
528	CODE:
529	{
530	aio_req req;
531
532	Newz (0, req, 1, aio_cb);
533
534	if (!req)
535	croak ("out of memory during aio_req allocation");
536
537	New (0, req->statdata, 1, Stat_t);
538
539	if (!req->statdata)
540	croak ("out of memory during aio_req->statdata allocation");
541
542	if (SvPOK (fh_or_path))
543	{
544	req->type = ix;
545	req->data = newSVsv (fh_or_path);
546	req->dataptr = SvPV_nolen (req->data);
547	}
548	else
549	{
550	req->type = REQ_FSTAT;
551	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
552	}
553
554	req->callback = SvREFCNT_inc (callback);
555
556	send_req (req);
557	}
558
559	void
560	aio_unlink(pathname,callback=&PL_sv_undef)
561	SV * pathname
562	SV * callback
563	CODE:
564	{
565	aio_req req;
566
567	Newz (0, req, 1, aio_cb);
568
569	if (!req)
570	croak ("out of memory during aio_req allocation");
571
572	req->type = REQ_UNLINK;
573	req->data = newSVsv (pathname);
574	req->dataptr = SvPV_nolen (req->data);
575	req->callback = SvREFCNT_inc (callback);
576
577	send_req (req);
578	}
579
580	void
581	flush()
582	PROTOTYPE:
583	CODE:
584	while (nreqs)
585	{
586	poll_wait ();
587	poll_cb ();
588	}
589
590	void
591	poll()	1011	poll()
592	PROTOTYPE:	1012	PROTOTYPE:
593	CODE:	1013	CODE:
594	if (nreqs)
595	{
596	poll_wait ();	1014	poll_wait ();
597	poll_cb ();	1015	RETVAL = poll_cb ();
598	}	1016	OUTPUT:
		1017	RETVAL
599		1018
600	int	1019	int
601	poll_fileno()	1020	poll_fileno()
602	PROTOTYPE:	1021	PROTOTYPE:
603	CODE:	1022	CODE:
…		…
615		1034
616	void	1035	void
617	poll_wait()	1036	poll_wait()
618	PROTOTYPE:	1037	PROTOTYPE:
619	CODE:	1038	CODE:
620	if (nreqs)
621	poll_wait ();	1039	poll_wait ();
622		1040
623	int	1041	int
624	nreqs()	1042	nreqs()
625	PROTOTYPE:	1043	PROTOTYPE:
626	CODE:	1044	CODE:
627	RETVAL = nreqs;	1045	RETVAL = eio_nreqs ();
628	OUTPUT:	1046	OUTPUT:
629	RETVAL	1047	RETVAL
630		1048
		1049	int
		1050	nready()
		1051	PROTOTYPE:
		1052	CODE:
		1053	RETVAL = eio_nready ();
		1054	OUTPUT:
		1055	RETVAL
		1056
		1057	int
		1058	npending()
		1059	PROTOTYPE:
		1060	CODE:
		1061	RETVAL = eio_npending ();
		1062	OUTPUT:
		1063	RETVAL
		1064
		1065	int
		1066	nthreads()
		1067	PROTOTYPE:
		1068	CODE:
		1069	RETVAL = eio_nthreads ();
		1070	OUTPUT:
		1071	RETVAL
		1072
		1073	void _on_next_submit (SV *cb)
		1074	CODE:
		1075	SvREFCNT_dec (on_next_submit);
		1076	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1077
		1078	PROTOTYPES: DISABLE
		1079
		1080	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1081
		1082	void
		1083	cancel (aio_req_ornot req)
		1084	CODE:
		1085	eio_cancel (req);
		1086
		1087	void
		1088	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1089	PPCODE:
		1090	{
		1091	if (GIMME_V != G_VOID)
		1092	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1093
		1094	if (items > 1)
		1095	{
		1096	SV *cb_cv = get_cb (callback);
		1097
		1098	SvREFCNT_dec (req->callback);
		1099	req->callback = SvREFCNT_inc (cb_cv);
		1100	}
		1101	}
		1102
		1103	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1104
		1105	void
		1106	add (aio_req grp, ...)
		1107	PPCODE:
		1108	{
		1109	int i;
		1110
		1111	if (grp->int1 == 2)
		1112	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1113
		1114	for (i = 1; i < items; ++i )
		1115	{
		1116	aio_req req;
		1117
		1118	if (GIMME_V != G_VOID)
		1119	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1120
		1121	req = SvAIO_REQ (ST (i));
		1122
		1123	if (req)
		1124	eio_grp_add (grp, req);
		1125	}
		1126	}
		1127
		1128	void
		1129	cancel_subs (aio_req_ornot req)
		1130	CODE:
		1131	req_cancel_subs (req);
		1132
		1133	void
		1134	result (aio_req grp, ...)
		1135	CODE:
		1136	{
		1137	int i;
		1138	AV *av;
		1139
		1140	grp->errorno = errno;
		1141
		1142	av = newAV ();
		1143
		1144	for (i = 1; i < items; ++i )
		1145	av_push (av, newSVsv (ST (i)));
		1146
		1147	SvREFCNT_dec (grp->sv1);
		1148	grp->sv1 = (SV *)av;
		1149	}
		1150
		1151	void
		1152	errno (aio_req grp, int errorno = errno)
		1153	CODE:
		1154	grp->errorno = errorno;
		1155
		1156	void
		1157	limit (aio_req grp, int limit)
		1158	CODE:
		1159	eio_grp_limit (grp, limit);
		1160
		1161	void
		1162	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1163	CODE:
		1164	{
		1165	SvREFCNT_dec (grp->sv2);
		1166	grp->sv2 = newSVsv (callback);
		1167	grp->feed = aio_grp_feed;
		1168
		1169	if (grp->int2 <= 0)
		1170	grp->int2 = 2;
		1171
		1172	eio_grp_limit (grp, grp->int2);
		1173	}
		1174

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