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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.18 by root, Sun Jul 31 19:00:31 2005 UTC vs.
Revision 1.132 by root, Mon Oct 13 10:38:17 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
5	#include "autoconf/config.h"	9	#include <stddef.h>
6		10	#include <stdlib.h>
		11	#include <errno.h>
7	#include <sys/types.h>	12	#include <sys/types.h>
8	#include <sys/stat.h>	13	#include <sys/stat.h>
9
10	#include <unistd.h>	14	#include <limits.h>
11	#include <fcntl.h>	15	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	16	#include <sched.h>
14		17
15	#ifndef _REENTRANT	18	/* perl namespace pollution */
16	# define _REENTRANT 1	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>
		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
17	#endif	68	#endif
18	#include <errno.h>
19		69
20	#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
21		75
22	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	76	#define EIO_STRUCT_STAT Stat_t
23	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
24	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
25		77
26	#if __ia64	78	/* use NV for 32 bit perls as it allows larger offsets */
27	# define STACKSIZE 65536	79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
28	#else	81	#else
29	# define STACKSIZE 4096	82	# define SvVAL64 SvNV
30	#endif	83	#endif
31		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
32	enum {	119	enum {
33	REQ_QUIT,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
34	REQ_OPEN, REQ_CLOSE,
35	REQ_READ, REQ_WRITE, REQ_READAHEAD,
36	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
37	REQ_FSYNC, REQ_FDATASYNC,
38	};	121	};
39		122
40	typedef struct aio_cb {	123	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		124
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
59		127
60	static int started;	128	static SV *on_next_submit;
61	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	130	static int max_outstanding;
63	static int respipe [2];
64		131
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		133
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
70	static volatile aio_req ress, rese; /* queue start, queue end */	135	static void req_cancel (aio_req req);
71		136
72	static void	137	static void want_poll (void)
73	poll_wait ()
74	{	138	{
75	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)
76	{	155	{
77	fd_set rfd;	156	req->self = (SV *)newHV ();
78	FD_ZERO(&rfd);	157	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
79	FD_SET(respipe [0], &rfd);
80
81	select (respipe [0] + 1, &rfd, 0, 0, 0);
82	}	158	}
83	}
84		159
85	static int	160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
86	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)
87	{	211	{
88	dSP;	212	dSP;
89	int count = 0;
90	aio_req req, prv;
91		213
92	pthread_mutex_lock (&reslock);	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
93		216
94	{	217	if (!EIO_CANCELLED (req) && req->callback)
95	/* read any signals sent by the worker threads */
96	char buf [32];
97	while (read (respipe [0], buf, 32) > 0)
98	;
99	}
100
101	req = ress;
102	ress = rese = 0;
103
104	pthread_mutex_unlock (&reslock);
105
106	while (req)
107	{	218	{
108	nreqs--;	219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
109		223
110	if (req->type == REQ_QUIT)	224	switch (req->type)
111	started--;
112	else
113	{	225	{
114	int errorno = errno;	226	case EIO_READDIR:
115	errno = req->errorno;
116
117	if (req->type == REQ_READ)
118	SvCUR_set (req->data, req->dataoffset
119	+ req->result > 0 ? req->result : 0);
120
121	if (req->data)
122	SvREFCNT_dec (req->data);
123
124	if (req->fh)
125	SvREFCNT_dec (req->fh);
126
127	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
128	{	227	{
129	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	228	SV *rv = &PL_sv_undef;
130	PL_laststatval = req->result;
131	PL_statcache = *(req->statdata);
132		229
133	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);
134	}	250	}
		251	break;
135		252
136	ENTER;	253	case EIO_OPEN:
137	PUSHMARK (SP);
138	XPUSHs (sv_2mortal (newSViv (req->result)));
139
140	if (req->type == REQ_OPEN)
141	{	254	{
142	/* convert fd to fh */	255	/* convert fd to fh */
143	SV *fh;	256	SV *fh = &PL_sv_undef;
144		257
145	PUTBACK;	258	if (req->result >= 0)
146	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	259	{
147	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);
148		267
149	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	);
150		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
151	PUSHMARK (SP);	280	PUSHs (fh);
152	XPUSHs (sv_2mortal (fh));
153	}	281	}
154
155	if (SvOK (req->callback))
156	{
157	PUTBACK;
158	call_sv (req->callback, G_VOID | G_EVAL);
159	SPAGAIN;
160	}
161
162	LEAVE;
163
164	if (req->callback)
165	SvREFCNT_dec (req->callback);
166
167	errno = errorno;
168	count++;
169	}
170
171	prv = req;
172	req = req->next;
173	Safefree (prv);
174
175	/* TODO: croak on errors? */
176	}
177
178	return count;
179	}
180
181	static void *aio_proc(void *arg);
182
183	static void
184	start_thread (void)
185	{
186	sigset_t fullsigset, oldsigset;
187	pthread_t tid;
188	pthread_attr_t attr;
189
190	pthread_attr_init (&attr);
191	pthread_attr_setstacksize (&attr, STACKSIZE);
192	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
193
194	sigfillset (&fullsigset);
195	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
196
197	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
198	started++;
199
200	sigprocmask (SIG_SETMASK, &oldsigset, 0);
201	}
202
203	static void
204	send_req (aio_req req)
205	{
206	nreqs++;
207
208	pthread_mutex_lock (&reqlock);
209
210	req->next = 0;
211
212	if (reqe)
213	{
214	reqe->next = req;
215	reqe = req;
216	}
217	else
218	reqe = reqs = req;
219
220	pthread_cond_signal (&reqwait);
221	pthread_mutex_unlock (&reqlock);
222
223	while (nreqs > max_outstanding)
224	{
225	poll_wait ();
226	poll_cb ();
227	}
228	}
229
230	static void
231	end_thread (void)
232	{
233	aio_req req;
234	New (0, req, 1, aio_cb);
235	req->type = REQ_QUIT;
236
237	send_req (req);
238	}
239
240	/* work around various missing functions */
241
242	#if !HAVE_PREADWRITE
243	# define pread aio_pread
244	# define pwrite aio_pwrite
245
246	/*
247	* make our pread/pwrite safe against themselves, but not against
248	* normal read/write by using a mutex. slows down execution a lot,
249	* but that's your problem, not mine.
250	*/
251	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
252
253	static ssize_t
254	pread (int fd, void *buf, size_t count, off_t offset)
255	{
256	ssize_t res;
257	off_t ooffset;
258
259	pthread_mutex_lock (&iolock);
260	ooffset = lseek (fd, 0, SEEK_CUR);
261	lseek (fd, offset, SEEK_SET);
262	res = read (fd, buf, count);
263	lseek (fd, ooffset, SEEK_SET);
264	pthread_mutex_unlock (&iolock);
265
266	return res;
267	}
268
269	static ssize_t
270	pwrite (int fd, void *buf, size_t count, off_t offset)
271	{
272	ssize_t res;
273	off_t ooffset;
274
275	pthread_mutex_lock (&iolock);
276	ooffset = lseek (fd, 0, SEEK_CUR);
277	lseek (fd, offset, SEEK_SET);
278	res = write (fd, buf, count);
279	lseek (fd, offset, SEEK_SET);
280	pthread_mutex_unlock (&iolock);
281
282	return res;
283	}
284	#endif
285
286	#if !HAVE_FDATASYNC
287	# define fdatasync fsync
288	#endif
289
290	#if !HAVE_READAHEAD
291	# define readahead aio_readahead
292
293	static char readahead_buf[4096];
294
295	static ssize_t
296	readahead (int fd, off_t offset, size_t count)
297	{
298	while (count > 0)
299	{
300	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
301
302	pread (fd, readahead_buf, len, offset);
303	offset += len;
304	count -= len;
305	}
306
307	errno = 0;
308	}
309	#endif
310
311	static void *
312	aio_proc (void *thr_arg)
313	{
314	aio_req req;
315	int type;
316
317	do
318	{
319	pthread_mutex_lock (&reqlock);
320
321	for (;;)
322	{
323	req = reqs;
324
325	if (reqs)
326	{
327	reqs = reqs->next;
328	if (!reqs) reqe = 0;
329	}
330
331	if (req)
332	break;	282	break;
333		283
334	pthread_cond_wait (&reqwait, &reqlock);	284	case EIO_GROUP:
335	}	285	req->int1 = 2; /* mark group as finished */
336		286
337	pthread_mutex_unlock (&reqlock);	287	if (req->sv1)
338
339	errno = 0; /* strictly unnecessary */
340
341	type = req->type;
342
343	switch (type)
344	{	288	{
345	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	289	int i;
346	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	290	AV *av = (AV *)req->sv1;
347		291
348	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	292	EXTEND (SP, AvFILL (av) + 1);
349		293	for (i = 0; i <= AvFILL (av); ++i)
350	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	294	PUSHs (*av_fetch (av, i, 0));
351	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	295	}
352	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
353
354	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
355	case REQ_CLOSE: req->result = close (req->fd); break;
356	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
357
358	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
359	case REQ_FSYNC: req->result = fsync (req->fd); break;
360
361	case REQ_QUIT:
362	break;	296	break;
363		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
364	default:	327	default:
365	req->result = ENOSYS;	328	PUSHs (sv_2mortal (newSViv (req->result)));
366	break;	329	break;
367	}	330	}
368		331
369	req->errorno = errno;	332	errno = req->errorno;
370		333
371	pthread_mutex_lock (&reslock);	334	PUTBACK;
		335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		336	SPAGAIN;
372		337
373	req->next = 0;	338	FREETMPS;
		339	LEAVE;
374		340
375	if (rese)	341	PUTBACK;
376	{
377	rese->next = req;
378	rese = req;
379	}
380	else
381	{
382	rese = ress = req;
383
384	/* write a dummy byte to the pipe so fh becomes ready */
385	write (respipe [1], &respipe, 1);
386	}
387
388	pthread_mutex_unlock (&reslock);
389	}	342	}
390	while (type != REQ_QUIT);
391		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))
392	return 0;	472	return 0;
393	}
394		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
395	MODULE = IO::AIO PACKAGE = IO::AIO	505	MODULE = IO::AIO PACKAGE = IO::AIO
396		506
397	PROTOTYPES: ENABLE	507	PROTOTYPES: ENABLE
398		508
399	BOOT:	509	BOOT:
400	{	510	{
401	if (pipe (respipe))	511	stash = gv_stashpv ("IO::AIO", 1);
402	croak ("unable to initialize result pipe");
403		512
404	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	513	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
405	croak ("cannot set result pipe to nonblocking mode");	514	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		515	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		516	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		517	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		518	#ifndef _WIN32
		519	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		520	#endif
406		521
407	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	522	create_respipe ();
408	croak ("cannot set result pipe to nonblocking mode");
409	}
410		523
		524	if (eio_init (want_poll, done_poll) < 0)
		525	croak ("IO::AIO: unable to initialise eio library");
		526
		527	/* atfork child called in fifo order, so before eio's handler */
		528	X_THREAD_ATFORK (0, 0, atfork_child);
		529	}
		530
411	void	531	void
412	min_parallel(nthreads)	532	max_poll_reqs (int nreqs)
413	int nthreads
414	PROTOTYPE: $	533	PROTOTYPE: $
415	CODE:	534	CODE:
416	while (nthreads > started)	535	eio_set_max_poll_reqs (nreqs);
417	start_thread ();
418		536
419	void	537	void
420	max_parallel(nthreads)	538	max_poll_time (double nseconds)
421	int nthreads
422	PROTOTYPE: $	539	PROTOTYPE: $
423	CODE:	540	CODE:
		541	eio_set_max_poll_time (nseconds);
		542
		543	void
		544	min_parallel (int nthreads)
		545	PROTOTYPE: $
		546	CODE:
		547	eio_set_min_parallel (nthreads);
		548
		549	void
		550	max_parallel (int nthreads)
		551	PROTOTYPE: $
		552	CODE:
		553	eio_set_max_parallel (nthreads);
		554
		555	void
		556	max_idle (int nthreads)
		557	PROTOTYPE: $
		558	CODE:
		559	eio_set_max_idle (nthreads);
		560
		561	void
		562	max_outstanding (int maxreqs)
		563	PROTOTYPE: $
		564	CODE:
		565	max_outstanding = maxreqs;
		566
		567	void
		568	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		569	PROTOTYPE: $$$;$
		570	PPCODE:
424	{	571	{
425	int cur = started;	572	dREQ;
426	while (cur > nthreads)	573
427	{	574	req->type = EIO_OPEN;
428	end_thread ();	575	req->sv1 = newSVsv (pathname);
		576	req->ptr1 = SvPVbyte_nolen (req->sv1);
		577	req->int1 = flags;
		578	req->int2 = mode;
		579
		580	REQ_SEND;
		581	}
		582
		583	void
		584	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		585	PROTOTYPE: $;$
		586	ALIAS:
		587	aio_fsync = EIO_FSYNC
		588	aio_fdatasync = EIO_FDATASYNC
		589	PPCODE:
		590	{
		591	dREQ;
		592
		593	req->type = ix;
		594	req->sv1 = newSVsv (fh);
		595	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		596
		597	REQ_SEND (req);
		598	}
		599
		600	void
		601	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		602	PROTOTYPE: $;$
		603	PPCODE:
		604	{
		605	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		606	dREQ;
		607
		608	if (close_pipe < 0)
		609	{
		610	int pipefd [2];
		611
		612	if (pipe (pipefd) < 0
		613	|| close (pipefd [1]) < 0
		614	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		615	abort (); /*D*/
		616
		617	close_pipe = pipefd [0];
		618	}
		619
		620	req->type = EIO_DUP2;
		621	req->int1 = close_pipe;
		622	req->sv2 = newSVsv (fh);
		623	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		624
		625	REQ_SEND (req);
		626	}
		627
		628	void
		629	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		630	ALIAS:
		631	aio_read = EIO_READ
		632	aio_write = EIO_WRITE
		633	PROTOTYPE: $$$$$;$
		634	PPCODE:
		635	{
		636	STRLEN svlen;
		637	char *svptr = SvPVbyte (data, svlen);
		638	UV len = SvUV (length);
		639
		640	SvUPGRADE (data, SVt_PV);
		641	SvPOK_on (data);
		642
		643	if (dataoffset < 0)
		644	dataoffset += svlen;
		645
		646	if (dataoffset < 0 || dataoffset > svlen)
		647	croak ("dataoffset outside of data scalar");
		648
		649	if (ix == EIO_WRITE)
		650	{
		651	/* write: check length and adjust. */
		652	if (!SvOK (length) || len + dataoffset > svlen)
		653	len = svlen - dataoffset;
		654	}
		655	else
		656	{
		657	/* read: grow scalar as necessary */
		658	svptr = SvGROW (data, len + dataoffset + 1);
		659	}
		660
		661	if (len < 0)
		662	croak ("length must not be negative");
		663
		664	{
		665	dREQ;
		666
		667	req->type = ix;
		668	req->sv1 = newSVsv (fh);
		669	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		670	: IoOFP (sv_2io (fh)));
		671	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		672	req->size = len;
		673	req->sv2 = SvREFCNT_inc (data);
		674	req->ptr2 = (char *)svptr + dataoffset;
		675	req->stroffset = dataoffset;
		676
		677	if (!SvREADONLY (data))
429	cur--;	678	{
		679	SvREADONLY_on (data);
		680	req->flags |= FLAG_SV2_RO_OFF;
430	}	681	}
431		682
432	while (started > nthreads)	683	REQ_SEND;
		684	}
		685	}
		686
		687	void
		688	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		689	PROTOTYPE: $$;$
		690	PPCODE:
		691	{
		692	SV *data;
		693	dREQ;
		694
		695	req->type = EIO_READLINK;
		696	req->sv1 = newSVsv (path);
		697	req->ptr1 = SvPVbyte_nolen (req->sv1);
		698
		699	REQ_SEND;
		700	}
		701
		702	void
		703	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		704	PROTOTYPE: $$$$;$
		705	PPCODE:
		706	{
		707	dREQ;
		708
		709	req->type = EIO_SENDFILE;
		710	req->sv1 = newSVsv (out_fh);
		711	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		712	req->sv2 = newSVsv (in_fh);
		713	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		714	req->offs = SvVAL64 (in_offset);
		715	req->size = length;
		716
		717	REQ_SEND;
		718	}
		719
		720	void
		721	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		722	PROTOTYPE: $$$;$
		723	PPCODE:
		724	{
		725	dREQ;
		726
		727	req->type = EIO_READAHEAD;
		728	req->sv1 = newSVsv (fh);
		729	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		730	req->offs = SvVAL64 (offset);
		731	req->size = length;
		732
		733	REQ_SEND;
		734	}
		735
		736	void
		737	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		738	ALIAS:
		739	aio_stat = EIO_STAT
		740	aio_lstat = EIO_LSTAT
		741	PPCODE:
		742	{
		743	dREQ;
		744
		745	req->sv1 = newSVsv (fh_or_path);
		746
		747	if (SvPOK (req->sv1))
		748	{
		749	req->type = ix;
		750	req->ptr1 = SvPVbyte_nolen (req->sv1);
		751	}
		752	else
		753	{
		754	req->type = EIO_FSTAT;
		755	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		756	}
		757
		758	REQ_SEND;
		759	}
		760
		761	void
		762	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		763	PPCODE:
		764	{
		765	dREQ;
		766
		767	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		768	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		769	req->sv1 = newSVsv (fh_or_path);
		770
		771	if (SvPOK (req->sv1))
		772	{
		773	req->type = EIO_UTIME;
		774	req->ptr1 = SvPVbyte_nolen (req->sv1);
		775	}
		776	else
		777	{
		778	req->type = EIO_FUTIME;
		779	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		780	}
		781
		782	REQ_SEND;
		783	}
		784
		785	void
		786	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		787	PPCODE:
		788	{
		789	dREQ;
		790
		791	req->sv1 = newSVsv (fh_or_path);
		792	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		793
		794	if (SvPOK (req->sv1))
		795	{
		796	req->type = EIO_TRUNCATE;
		797	req->ptr1 = SvPVbyte_nolen (req->sv1);
		798	}
		799	else
		800	{
		801	req->type = EIO_FTRUNCATE;
		802	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		803	}
		804
		805	REQ_SEND;
		806	}
		807
		808	void
		809	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		810	ALIAS:
		811	aio_chmod = EIO_CHMOD
		812	aio_mkdir = EIO_MKDIR
		813	PPCODE:
		814	{
		815	dREQ;
		816
		817	req->int2 = mode;
		818	req->sv1 = newSVsv (fh_or_path);
		819
		820	if (SvPOK (req->sv1))
		821	{
		822	req->type = ix;
		823	req->ptr1 = SvPVbyte_nolen (req->sv1);
		824	}
		825	else
		826	{
		827	req->type = EIO_FCHMOD;
		828	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		829	}
		830
		831	REQ_SEND;
		832	}
		833
		834	void
		835	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		836	PPCODE:
		837	{
		838	dREQ;
		839
		840	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		841	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		842	req->sv1 = newSVsv (fh_or_path);
		843
		844	if (SvPOK (req->sv1))
		845	{
		846	req->type = EIO_CHOWN;
		847	req->ptr1 = SvPVbyte_nolen (req->sv1);
		848	}
		849	else
		850	{
		851	req->type = EIO_FCHOWN;
		852	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		853	}
		854
		855	REQ_SEND;
		856	}
		857
		858	void
		859	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		860	ALIAS:
		861	aio_unlink = EIO_UNLINK
		862	aio_rmdir = EIO_RMDIR
		863	aio_readdir = EIO_READDIR
		864	PPCODE:
		865	{
		866	dREQ;
		867
		868	req->type = ix;
		869	req->sv1 = newSVsv (pathname);
		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871
		872	REQ_SEND;
		873	}
		874
		875	void
		876	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		877	ALIAS:
		878	aio_link = EIO_LINK
		879	aio_symlink = EIO_SYMLINK
		880	aio_rename = EIO_RENAME
		881	PPCODE:
		882	{
		883	dREQ;
		884
		885	req->type = ix;
		886	req->sv1 = newSVsv (oldpath);
		887	req->ptr1 = SvPVbyte_nolen (req->sv1);
		888	req->sv2 = newSVsv (newpath);
		889	req->ptr2 = SvPVbyte_nolen (req->sv2);
		890
		891	REQ_SEND;
		892	}
		893
		894	void
		895	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		896	PPCODE:
		897	{
		898	dREQ;
		899
		900	req->type = EIO_MKNOD;
		901	req->sv1 = newSVsv (pathname);
		902	req->ptr1 = SvPVbyte_nolen (req->sv1);
		903	req->int2 = (mode_t)mode;
		904	req->offs = dev;
		905
		906	REQ_SEND;
		907	}
		908
		909	void
		910	aio_busy (double delay, SV *callback=&PL_sv_undef)
		911	PPCODE:
		912	{
		913	dREQ;
		914
		915	req->type = EIO_BUSY;
		916	req->nv1 = delay < 0. ? 0. : delay;
		917
		918	REQ_SEND;
		919	}
		920
		921	void
		922	aio_group (SV *callback=&PL_sv_undef)
		923	PROTOTYPE: ;$
		924	PPCODE:
		925	{
		926	dREQ;
		927
		928	req->type = EIO_GROUP;
		929
		930	req_submit (req);
		931	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		932	}
		933
		934	void
		935	aio_nop (SV *callback=&PL_sv_undef)
		936	ALIAS:
		937	aio_nop = EIO_NOP
		938	aio_sync = EIO_SYNC
		939	PPCODE:
		940	{
		941	dREQ;
		942
		943	req->type = ix;
		944
		945	REQ_SEND;
		946	}
		947
		948	int
		949	aioreq_pri (int pri = 0)
		950	PROTOTYPE: ;$
		951	CODE:
		952	RETVAL = next_pri;
		953	if (items > 0)
		954	{
		955	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		956	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		957	next_pri = pri;
		958	}
		959	OUTPUT:
		960	RETVAL
		961
		962	void
		963	aioreq_nice (int nice = 0)
		964	CODE:
		965	nice = next_pri - nice;
		966	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		967	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		968	next_pri = nice;
		969
		970	void
		971	flush ()
		972	PROTOTYPE:
		973	CODE:
		974	while (eio_nreqs ())
433	{	975	{
434	poll_wait ();	976	poll_wait ();
435	poll_cb ();	977	poll_cb ();
436	}	978	}
437	}
438		979
439	int	980	int
440	max_outstanding(nreqs)
441	int nreqs
442	PROTOTYPE: $
443	CODE:
444	RETVAL = max_outstanding;
445	max_outstanding = nreqs;
446
447	void
448	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
449	SV * pathname
450	int flags
451	int mode
452	SV * callback
453	PROTOTYPE: $$$;$
454	CODE:
455	{
456	aio_req req;
457
458	Newz (0, req, 1, aio_cb);
459
460	if (!req)
461	croak ("out of memory during aio_req allocation");
462
463	req->type = REQ_OPEN;
464	req->data = newSVsv (pathname);
465	req->dataptr = SvPV_nolen (req->data);
466	req->fd = flags;
467	req->mode = mode;
468	req->callback = SvREFCNT_inc (callback);
469
470	send_req (req);
471	}
472
473	void
474	aio_close(fh,callback=&PL_sv_undef)
475	SV * fh
476	SV * callback
477	PROTOTYPE: $;$
478	ALIAS:
479	aio_close = REQ_CLOSE
480	aio_fsync = REQ_FSYNC
481	aio_fdatasync = REQ_FDATASYNC
482	CODE:
483	{
484	aio_req req;
485
486	Newz (0, req, 1, aio_cb);
487
488	if (!req)
489	croak ("out of memory during aio_req allocation");
490
491	req->type = ix;
492	req->fh = newSVsv (fh);
493	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
494	req->callback = SvREFCNT_inc (callback);
495
496	send_req (req);
497	}
498
499	void
500	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
501	SV * fh
502	UV offset
503	IV length
504	SV * data
505	IV dataoffset
506	SV * callback
507	ALIAS:
508	aio_read = REQ_READ
509	aio_write = REQ_WRITE
510	PROTOTYPE: $$$$$;$
511	CODE:
512	{
513	aio_req req;
514	STRLEN svlen;
515	char *svptr = SvPV (data, svlen);
516
517	SvUPGRADE (data, SVt_PV);
518	SvPOK_on (data);
519
520	if (dataoffset < 0)
521	dataoffset += svlen;
522
523	if (dataoffset < 0 || dataoffset > svlen)
524	croak ("data offset outside of string");
525
526	if (ix == REQ_WRITE)
527	{
528	/* write: check length and adjust. */
529	if (length < 0 || length + dataoffset > svlen)
530	length = svlen - dataoffset;
531	}
532	else
533	{
534	/* read: grow scalar as necessary */
535	svptr = SvGROW (data, length + dataoffset);
536	}
537
538	if (length < 0)
539	croak ("length must not be negative");
540
541	Newz (0, req, 1, aio_cb);
542
543	if (!req)
544	croak ("out of memory during aio_req allocation");
545
546	req->type = ix;
547	req->fh = newSVsv (fh);
548	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
549	: IoOFP (sv_2io (fh)));
550	req->offset = offset;
551	req->length = length;
552	req->data = SvREFCNT_inc (data);
553	req->dataptr = (char *)svptr + dataoffset;
554	req->callback = SvREFCNT_inc (callback);
555
556	send_req (req);
557	}
558
559	void
560	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
561	SV * fh
562	UV offset
563	IV length
564	SV * callback
565	PROTOTYPE: $$$;$
566	CODE:
567	{
568	aio_req req;
569
570	if (length < 0)
571	croak ("length must not be negative");
572
573	Newz (0, req, 1, aio_cb);
574
575	if (!req)
576	croak ("out of memory during aio_req allocation");
577
578	req->type = REQ_READAHEAD;
579	req->fh = newSVsv (fh);
580	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
581	req->offset = offset;
582	req->length = length;
583	req->callback = SvREFCNT_inc (callback);
584
585	send_req (req);
586	}
587
588	void
589	aio_stat(fh_or_path,callback=&PL_sv_undef)
590	SV * fh_or_path
591	SV * callback
592	ALIAS:
593	aio_stat = REQ_STAT
594	aio_lstat = REQ_LSTAT
595	CODE:
596	{
597	aio_req req;
598
599	Newz (0, req, 1, aio_cb);
600
601	if (!req)
602	croak ("out of memory during aio_req allocation");
603
604	New (0, req->statdata, 1, Stat_t);
605
606	if (!req->statdata)
607	croak ("out of memory during aio_req->statdata allocation");
608
609	if (SvPOK (fh_or_path))
610	{
611	req->type = ix;
612	req->data = newSVsv (fh_or_path);
613	req->dataptr = SvPV_nolen (req->data);
614	}
615	else
616	{
617	req->type = REQ_FSTAT;
618	req->fh = newSVsv (fh_or_path);
619	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
620	}
621
622	req->callback = SvREFCNT_inc (callback);
623
624	send_req (req);
625	}
626
627	void
628	aio_unlink(pathname,callback=&PL_sv_undef)
629	SV * pathname
630	SV * callback
631	CODE:
632	{
633	aio_req req;
634
635	Newz (0, req, 1, aio_cb);
636
637	if (!req)
638	croak ("out of memory during aio_req allocation");
639
640	req->type = REQ_UNLINK;
641	req->data = newSVsv (pathname);
642	req->dataptr = SvPV_nolen (req->data);
643	req->callback = SvREFCNT_inc (callback);
644
645	send_req (req);
646	}
647
648	void
649	flush()
650	PROTOTYPE:
651	CODE:
652	while (nreqs)
653	{
654	poll_wait ();
655	poll_cb ();
656	}
657
658	void
659	poll()	981	poll()
660	PROTOTYPE:	982	PROTOTYPE:
661	CODE:	983	CODE:
662	if (nreqs)
663	{
664	poll_wait ();	984	poll_wait ();
665	poll_cb ();	985	RETVAL = poll_cb ();
666	}	986	OUTPUT:
		987	RETVAL
667		988
668	int	989	int
669	poll_fileno()	990	poll_fileno()
670	PROTOTYPE:	991	PROTOTYPE:
671	CODE:	992	CODE:
…		…
683		1004
684	void	1005	void
685	poll_wait()	1006	poll_wait()
686	PROTOTYPE:	1007	PROTOTYPE:
687	CODE:	1008	CODE:
688	if (nreqs)
689	poll_wait ();	1009	poll_wait ();
690		1010
691	int	1011	int
692	nreqs()	1012	nreqs()
693	PROTOTYPE:	1013	PROTOTYPE:
694	CODE:	1014	CODE:
695	RETVAL = nreqs;	1015	RETVAL = eio_nreqs ();
696	OUTPUT:	1016	OUTPUT:
697	RETVAL	1017	RETVAL
698		1018
		1019	int
		1020	nready()
		1021	PROTOTYPE:
		1022	CODE:
		1023	RETVAL = eio_nready ();
		1024	OUTPUT:
		1025	RETVAL
		1026
		1027	int
		1028	npending()
		1029	PROTOTYPE:
		1030	CODE:
		1031	RETVAL = eio_npending ();
		1032	OUTPUT:
		1033	RETVAL
		1034
		1035	int
		1036	nthreads()
		1037	PROTOTYPE:
		1038	CODE:
		1039	RETVAL = eio_nthreads ();
		1040	OUTPUT:
		1041	RETVAL
		1042
		1043	void _on_next_submit (SV *cb)
		1044	CODE:
		1045	SvREFCNT_dec (on_next_submit);
		1046	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1047
		1048	PROTOTYPES: DISABLE
		1049
		1050	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1051
		1052	void
		1053	cancel (aio_req_ornot req)
		1054	CODE:
		1055	eio_cancel (req);
		1056
		1057	void
		1058	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1059	PPCODE:
		1060	{
		1061	if (GIMME_V != G_VOID)
		1062	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1063
		1064	if (items > 1)
		1065	{
		1066	SV *cb_cv = get_cb (callback);
		1067
		1068	SvREFCNT_dec (req->callback);
		1069	req->callback = SvREFCNT_inc (cb_cv);
		1070	}
		1071	}
		1072
		1073	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1074
		1075	void
		1076	add (aio_req grp, ...)
		1077	PPCODE:
		1078	{
		1079	int i;
		1080
		1081	if (grp->int1 == 2)
		1082	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1083
		1084	for (i = 1; i < items; ++i )
		1085	{
		1086	aio_req req;
		1087
		1088	if (GIMME_V != G_VOID)
		1089	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1090
		1091	req = SvAIO_REQ (ST (i));
		1092
		1093	if (req)
		1094	eio_grp_add (grp, req);
		1095	}
		1096	}
		1097
		1098	void
		1099	cancel_subs (aio_req_ornot req)
		1100	CODE:
		1101	req_cancel_subs (req);
		1102
		1103	void
		1104	result (aio_req grp, ...)
		1105	CODE:
		1106	{
		1107	int i;
		1108	AV *av;
		1109
		1110	grp->errorno = errno;
		1111
		1112	av = newAV ();
		1113
		1114	for (i = 1; i < items; ++i )
		1115	av_push (av, newSVsv (ST (i)));
		1116
		1117	SvREFCNT_dec (grp->sv1);
		1118	grp->sv1 = (SV *)av;
		1119	}
		1120
		1121	void
		1122	errno (aio_req grp, int errorno = errno)
		1123	CODE:
		1124	grp->errorno = errorno;
		1125
		1126	void
		1127	limit (aio_req grp, int limit)
		1128	CODE:
		1129	eio_grp_limit (grp, limit);
		1130
		1131	void
		1132	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1133	CODE:
		1134	{
		1135	SvREFCNT_dec (grp->sv2);
		1136	grp->sv2 = newSVsv (callback);
		1137	grp->feed = aio_grp_feed;
		1138
		1139	if (grp->int2 <= 0)
		1140	grp->int2 = 2;
		1141
		1142	eio_grp_limit (grp, grp->int2);
		1143	}
		1144

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