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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 1.123 by root, Sat May 17 12:17:25 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	#define EIO_STRUCT_STAT Stat_t
21		71
22	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	72	/* use NV for 32 bit perls as it allows larger offsets */
23	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	73	#if IVSIZE >= 8
24	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	74	# define SvVAL64 SvIV
25
26	#if __ia64
27	# define STACKSIZE 65536
28	#else	75	#else
29	# define STACKSIZE 4096	76	# define SvVAL64 SvNV
30	#endif	77	#endif
31		78
		79	static HV *stash;
		80	typedef SV SV8; /* byte-sv, used for argument-checking */
		81
		82	#define AIO_REQ_KLASS "IO::AIO::REQ"
		83	#define AIO_GRP_KLASS "IO::AIO::GRP"
		84
		85	#define EIO_REQ_MEMBERS \
		86	SV *callback; \
		87	SV *sv1, *sv2; \
		88	STRLEN stroffset; \
		89	SV *self;
		90
		91	#define EIO_NO_WRAPPERS 1
		92
		93	#include "libeio/eio.h"
		94
		95	static int req_invoke (eio_req *req);
		96	#define EIO_FINISH(req) req_invoke (req)
		97	static void aio_grp_feed (eio_req *grp);
		98	#define EIO_FEED(req) aio_grp_feed (req)
		99	static void req_destroy (eio_req *grp);
		100	#define EIO_DESTROY(req) req_destroy (req)
		101
32	enum {	102	enum {
33	REQ_QUIT,	103	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	};	104	};
39		105
40	typedef struct aio_cb {	106	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		107
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;	108	typedef eio_req *aio_req;
		109	typedef eio_req *aio_req_ornot;
59		110
60	static int started;	111	static SV *on_next_submit;
61	static volatile int nreqs;	112	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	113	static int max_outstanding;
63	static int respipe [2];
64		114
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	115	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		116
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	117	static void req_destroy (aio_req req);
70	static volatile aio_req ress, rese; /* queue start, queue end */	118	static void req_cancel (aio_req req);
71		119
72	static void	120	static void want_poll (void)
73	poll_wait ()
74	{	121	{
75	if (nreqs && !ress)	122	/* write a dummy byte to the pipe so fh becomes ready */
		123	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		124	}
		125
		126	static void done_poll (void)
		127	{
		128	/* read any signals sent by the worker threads */
		129	char buf [4];
		130	while (respipe_read (respipe [0], buf, 4) == 4)
		131	;
		132	}
		133
		134	/* must be called at most once */
		135	static SV *req_sv (aio_req req, const char *klass)
		136	{
		137	if (!req->self)
76	{	138	{
77	fd_set rfd;	139	req->self = (SV *)newHV ();
78	FD_ZERO(&rfd);	140	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	}	141	}
83	}
84		142
85	static int	143	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
86	poll_cb ()	144	}
		145
		146	static aio_req SvAIO_REQ (SV *sv)
		147	{
		148	MAGIC *mg;
		149
		150	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		151	croak ("object of class " AIO_REQ_KLASS " expected");
		152
		153	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		154
		155	return mg ? (aio_req)mg->mg_ptr : 0;
		156	}
		157
		158	static void aio_grp_feed (aio_req grp)
		159	{
		160	if (grp->sv2 && SvOK (grp->sv2))
		161	{
		162	dSP;
		163
		164	ENTER;
		165	SAVETMPS;
		166	PUSHMARK (SP);
		167	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		168	PUTBACK;
		169	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		170	SPAGAIN;
		171	FREETMPS;
		172	LEAVE;
		173	}
		174	}
		175
		176	static void req_submit (eio_req *req)
		177	{
		178	eio_submit (req);
		179
		180	if (on_next_submit)
		181	{
		182	dSP;
		183	SV *cb = sv_2mortal (on_next_submit);
		184
		185	on_next_submit = 0;
		186
		187	PUSHMARK (SP);
		188	PUTBACK;
		189	call_sv (cb, G_DISCARD | G_EVAL);
		190	}
		191	}
		192
		193	static int req_invoke (eio_req *req)
87	{	194	{
88	dSP;	195	dSP;
89	int count = 0;
90	aio_req req, prv;
91		196
92	pthread_mutex_lock (&reslock);	197	if (req->flags & FLAG_SV2_RO_OFF)
		198	SvREADONLY_off (req->sv2);
93		199
94	{	200	if (!EIO_CANCELLED (req) && SvOK (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	{	201	{
108	nreqs--;	202	ENTER;
		203	SAVETMPS;
		204	PUSHMARK (SP);
		205	EXTEND (SP, 1);
109		206
110	if (req->type == REQ_QUIT)	207	switch (req->type)
111	started--;
112	else
113	{	208	{
114	int errorno = errno;	209	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	{	210	{
129	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	211	SV *rv = &PL_sv_undef;
130	PL_laststatval = req->result;
131	PL_statcache = *(req->statdata);
132		212
133	Safefree (req->statdata);	213	if (req->result >= 0)
		214	{
		215	int i;
		216	char *buf = req->ptr2;
		217	AV *av = newAV ();
		218
		219	av_extend (av, req->result - 1);
		220
		221	for (i = 0; i < req->result; ++i)
		222	{
		223	SV *sv = newSVpv (buf, 0);
		224
		225	av_store (av, i, sv);
		226	buf += SvCUR (sv) + 1;
		227	}
		228
		229	rv = sv_2mortal (newRV_noinc ((SV *)av));
		230	}
		231
		232	PUSHs (rv);
134	}	233	}
		234	break;
135		235
136	ENTER;	236	case EIO_OPEN:
137	PUSHMARK (SP);
138	XPUSHs (sv_2mortal (newSViv (req->result)));
139
140	if (req->type == REQ_OPEN)
141	{	237	{
142	/* convert fd to fh */	238	/* convert fd to fh */
143	SV *fh;	239	SV *fh = &PL_sv_undef;
144		240
145	PUTBACK;	241	if (req->result >= 0)
146	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	242	{
147	SPAGAIN;	243	GV *gv = (GV *)sv_newmortal ();
		244	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		245	char sym [64];
		246	int symlen;
		247
		248	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		249	gv_init (gv, stash, sym, symlen, 0);
148		250
149	fh = SvREFCNT_inc (POPs);	251	symlen = snprintf (
		252	sym,
		253	sizeof (sym),
		254	"%s&=%d",
		255	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		256	req->result
		257	);
150		258
		259	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		260	fh = (SV *)gv;
		261	}
		262
151	PUSHMARK (SP);	263	PUSHs (fh);
152	XPUSHs (sv_2mortal (fh));
153	}	264	}
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;	265	break;
333		266
334	pthread_cond_wait (&reqwait, &reqlock);	267	case EIO_GROUP:
335	}	268	req->int1 = 2; /* mark group as finished */
336		269
337	pthread_mutex_unlock (&reqlock);	270	if (req->sv1)
338
339	errno = 0; /* strictly unnecessary */
340
341	type = req->type;
342
343	switch (type)
344	{	271	{
345	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	272	int i;
346	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	273	AV *av = (AV *)req->sv1;
347		274
348	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	275	EXTEND (SP, AvFILL (av) + 1);
349		276	for (i = 0; i <= AvFILL (av); ++i)
350	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	277	PUSHs (*av_fetch (av, i, 0));
351	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	278	}
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;	279	break;
363		280
		281	case EIO_NOP:
		282	case EIO_BUSY:
		283	break;
		284
		285	case EIO_READLINK:
		286	if (req->result > 0)
		287	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		288	break;
		289
		290	case EIO_STAT:
		291	case EIO_LSTAT:
		292	case EIO_FSTAT:
		293	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		294	PL_laststatval = req->result;
		295	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		296	PUSHs (sv_2mortal (newSViv (req->result)));
		297	break;
		298
		299	case EIO_READ:
		300	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		301	*SvEND (req->sv2) = 0;
		302	PUSHs (sv_2mortal (newSViv (req->result)));
		303	break;
		304
		305	case EIO_DUP2:
		306	if (req->result > 0)
		307	req->result = 0;
		308	/* FALLTHROUGH */
		309
364	default:	310	default:
365	req->result = ENOSYS;	311	PUSHs (sv_2mortal (newSViv (req->result)));
366	break;	312	break;
367	}	313	}
368		314
369	req->errorno = errno;	315	errno = req->errorno;
370		316
371	pthread_mutex_lock (&reslock);	317	PUTBACK;
		318	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		319	SPAGAIN;
372		320
373	req->next = 0;	321	FREETMPS;
		322	LEAVE;
374		323
375	if (rese)	324	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	}	325	}
390	while (type != REQ_QUIT);
391		326
		327	return !!SvTRUE (ERRSV);
		328	}
		329
		330	static void req_destroy (aio_req req)
		331	{
		332	if (req->self)
		333	{
		334	sv_unmagic (req->self, PERL_MAGIC_ext);
		335	SvREFCNT_dec (req->self);
		336	}
		337
		338	SvREFCNT_dec (req->sv1);
		339	SvREFCNT_dec (req->sv2);
		340	SvREFCNT_dec (req->callback);
		341
		342	Safefree (req);
		343	}
		344
		345	static void req_cancel_subs (aio_req grp)
		346	{
		347	aio_req sub;
		348
		349	if (grp->type != EIO_GROUP)
		350	return;
		351
		352	SvREFCNT_dec (grp->sv2);
		353	grp->sv2 = 0;
		354
		355	eio_grp_cancel (grp);
		356	}
		357
		358	#ifdef USE_SOCKETS_AS_HANDLES
		359	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		360	#else
		361	# define TO_SOCKET(x) (x)
		362	#endif
		363
		364	static void
		365	create_respipe (void)
		366	{
		367	int old_readfd = respipe [0];
		368
		369	if (respipe [1] >= 0)
		370	respipe_close (TO_SOCKET (respipe [1]));
		371
		372	#ifdef _WIN32
		373	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		374	#else
		375	if (pipe (respipe))
		376	#endif
		377	croak ("unable to initialize result pipe");
		378
		379	if (old_readfd >= 0)
		380	{
		381	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		382	croak ("unable to initialize result pipe(2)");
		383
		384	respipe_close (respipe [0]);
		385	respipe [0] = old_readfd;
		386	}
		387
		388	#ifdef _WIN32
		389	int arg = 1;
		390	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		391	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		392	#else
		393	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		394	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		395	#endif
		396	croak ("unable to initialize result pipe(3)");
		397
		398	respipe_osf [0] = TO_SOCKET (respipe [0]);
		399	respipe_osf [1] = TO_SOCKET (respipe [1]);
		400	}
		401
		402	static void poll_wait (void)
		403	{
		404	fd_set rfd;
		405
		406	while (eio_nreqs ())
		407	{
		408	int size;
		409
		410	X_LOCK (reslock);
		411	size = res_queue.size;
		412	X_UNLOCK (reslock);
		413
		414	if (size)
		415	return;
		416
		417	etp_maybe_start_thread ();
		418
		419	FD_ZERO (&rfd);
		420	FD_SET (respipe [0], &rfd);
		421
		422	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		423	}
		424	}
		425
		426	static int poll_cb (void)
		427	{
		428	int res;
		429
		430	do
		431	{
		432	res = eio_poll ();
		433
		434	if (res > 0)
		435	croak (0);
		436	}
		437	while (max_outstanding && max_outstanding <= eio_nreqs ());
		438
392	return 0;	439	return res;
393	}	440	}
394		441
		442	static void atfork_child (void)
		443	{
		444	create_respipe ();
		445	}
		446
		447	#define dREQ \
		448	aio_req req; \
		449	int req_pri = next_pri; \
		450	next_pri = EIO_PRI_DEFAULT; \
		451	\
		452	if (SvOK (callback) && !SvROK (callback)) \
		453	croak ("callback must be undef or of reference type"); \
		454	\
		455	Newz (0, req, 1, eio_req); \
		456	if (!req) \
		457	croak ("out of memory during eio_req allocation"); \
		458	\
		459	req->callback = newSVsv (callback); \
		460	req->pri = req_pri
		461
		462	#define REQ_SEND \
		463	req_submit (req); \
		464	\
		465	if (GIMME_V != G_VOID) \
		466	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		467
395	MODULE = IO::AIO PACKAGE = IO::AIO	468	MODULE = IO::AIO PACKAGE = IO::AIO
396		469
397	PROTOTYPES: ENABLE	470	PROTOTYPES: ENABLE
398		471
399	BOOT:	472	BOOT:
400	{	473	{
401	if (pipe (respipe))	474	stash = gv_stashpv ("IO::AIO", 1);
402	croak ("unable to initialize result pipe");
403		475
404	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	476	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
405	croak ("cannot set result pipe to nonblocking mode");	477	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		478	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		479	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		480	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		481	#ifndef _WIN32
		482	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		483	#endif
406		484
407	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	485	create_respipe ();
408	croak ("cannot set result pipe to nonblocking mode");
409	}
410		486
		487	if (eio_init (want_poll, done_poll) < 0)
		488	croak ("IO::AIO: unable to initialise eio library");
		489
		490	/* atfork child called in fifo order, so before eio's handler */
		491	X_THREAD_ATFORK (0, 0, atfork_child);
		492	}
		493
411	void	494	void
412	min_parallel(nthreads)	495	max_poll_reqs (int nreqs)
413	int nthreads
414	PROTOTYPE: $	496	PROTOTYPE: $
415	CODE:	497	CODE:
416	while (nthreads > started)	498	eio_set_max_poll_reqs (nreqs);
417	start_thread ();
418		499
419	void	500	void
420	max_parallel(nthreads)	501	max_poll_time (double nseconds)
421	int nthreads
422	PROTOTYPE: $	502	PROTOTYPE: $
423	CODE:	503	CODE:
		504	eio_set_max_poll_time (nseconds);
		505
		506	void
		507	min_parallel (int nthreads)
		508	PROTOTYPE: $
		509	CODE:
		510	eio_set_min_parallel (nthreads);
		511
		512	void
		513	max_parallel (int nthreads)
		514	PROTOTYPE: $
		515	CODE:
		516	eio_set_max_parallel (nthreads);
		517
		518	void
		519	max_idle (int nthreads)
		520	PROTOTYPE: $
		521	CODE:
		522	eio_set_max_idle (nthreads);
		523
		524	void
		525	max_outstanding (int maxreqs)
		526	PROTOTYPE: $
		527	CODE:
		528	max_outstanding = maxreqs;
		529
		530	void
		531	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		532	PROTOTYPE: $$$;$
		533	PPCODE:
424	{	534	{
425	int cur = started;	535	dREQ;
426	while (cur > nthreads)	536
427	{	537	req->type = EIO_OPEN;
428	end_thread ();	538	req->sv1 = newSVsv (pathname);
		539	req->ptr1 = SvPVbyte_nolen (req->sv1);
		540	req->int1 = flags;
		541	req->int2 = mode;
		542
		543	REQ_SEND;
		544	}
		545
		546	void
		547	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		548	PROTOTYPE: $;$
		549	ALIAS:
		550	aio_fsync = EIO_FSYNC
		551	aio_fdatasync = EIO_FDATASYNC
		552	PPCODE:
		553	{
		554	dREQ;
		555
		556	req->type = ix;
		557	req->sv1 = newSVsv (fh);
		558	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		559
		560	REQ_SEND (req);
		561	}
		562
		563	void
		564	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		565	PROTOTYPE: $;$
		566	PPCODE:
		567	{
		568	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		569	dREQ;
		570
		571	if (close_pipe < 0)
		572	{
		573	int pipefd [2];
		574
		575	if (pipe (pipefd) < 0
		576	|| close (pipefd [1]) < 0
		577	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		578	abort (); /*D*/
		579
		580	close_pipe = pipefd [0];
		581	}
		582
		583	req->type = EIO_DUP2;
		584	req->int1 = close_pipe;
		585	req->sv2 = newSVsv (fh);
		586	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		587
		588	REQ_SEND (req);
		589	}
		590
		591	void
		592	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		593	ALIAS:
		594	aio_read = EIO_READ
		595	aio_write = EIO_WRITE
		596	PROTOTYPE: $$$$$;$
		597	PPCODE:
		598	{
		599	STRLEN svlen;
		600	char *svptr = SvPVbyte (data, svlen);
		601	UV len = SvUV (length);
		602
		603	SvUPGRADE (data, SVt_PV);
		604	SvPOK_on (data);
		605
		606	if (dataoffset < 0)
		607	dataoffset += svlen;
		608
		609	if (dataoffset < 0 || dataoffset > svlen)
		610	croak ("dataoffset outside of data scalar");
		611
		612	if (ix == EIO_WRITE)
		613	{
		614	/* write: check length and adjust. */
		615	if (!SvOK (length) || len + dataoffset > svlen)
		616	len = svlen - dataoffset;
		617	}
		618	else
		619	{
		620	/* read: grow scalar as necessary */
		621	svptr = SvGROW (data, len + dataoffset + 1);
		622	}
		623
		624	if (len < 0)
		625	croak ("length must not be negative");
		626
		627	{
		628	dREQ;
		629
		630	req->type = ix;
		631	req->sv1 = newSVsv (fh);
		632	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		633	: IoOFP (sv_2io (fh)));
		634	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		635	req->size = len;
		636	req->sv2 = SvREFCNT_inc (data);
		637	req->ptr2 = (char *)svptr + dataoffset;
		638	req->stroffset = dataoffset;
		639
		640	if (!SvREADONLY (data))
429	cur--;	641	{
		642	SvREADONLY_on (data);
		643	req->flags |= FLAG_SV2_RO_OFF;
430	}	644	}
431		645
432	while (started > nthreads)	646	REQ_SEND;
		647	}
		648	}
		649
		650	void
		651	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		652	PROTOTYPE: $$;$
		653	PPCODE:
		654	{
		655	SV *data;
		656	dREQ;
		657
		658	req->type = EIO_READLINK;
		659	req->sv1 = newSVsv (path);
		660	req->ptr1 = SvPVbyte_nolen (req->sv1);
		661
		662	REQ_SEND;
		663	}
		664
		665	void
		666	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		667	PROTOTYPE: $$$$;$
		668	PPCODE:
		669	{
		670	dREQ;
		671
		672	req->type = EIO_SENDFILE;
		673	req->sv1 = newSVsv (out_fh);
		674	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		675	req->sv2 = newSVsv (in_fh);
		676	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		677	req->offs = SvVAL64 (in_offset);
		678	req->size = length;
		679
		680	REQ_SEND;
		681	}
		682
		683	void
		684	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		685	PROTOTYPE: $$$;$
		686	PPCODE:
		687	{
		688	dREQ;
		689
		690	req->type = EIO_READAHEAD;
		691	req->sv1 = newSVsv (fh);
		692	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		693	req->offs = SvVAL64 (offset);
		694	req->size = length;
		695
		696	REQ_SEND;
		697	}
		698
		699	void
		700	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		701	ALIAS:
		702	aio_stat = EIO_STAT
		703	aio_lstat = EIO_LSTAT
		704	PPCODE:
		705	{
		706	dREQ;
		707
		708	req->sv1 = newSVsv (fh_or_path);
		709
		710	if (SvPOK (req->sv1))
		711	{
		712	req->type = ix;
		713	req->ptr1 = SvPVbyte_nolen (req->sv1);
		714	}
		715	else
		716	{
		717	req->type = EIO_FSTAT;
		718	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		719	}
		720
		721	REQ_SEND;
		722	}
		723
		724	void
		725	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		726	PPCODE:
		727	{
		728	dREQ;
		729
		730	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		731	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		732	req->sv1 = newSVsv (fh_or_path);
		733
		734	if (SvPOK (req->sv1))
		735	{
		736	req->type = EIO_UTIME;
		737	req->ptr1 = SvPVbyte_nolen (req->sv1);
		738	}
		739	else
		740	{
		741	req->type = EIO_FUTIME;
		742	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		743	}
		744
		745	REQ_SEND;
		746	}
		747
		748	void
		749	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		750	PPCODE:
		751	{
		752	dREQ;
		753
		754	req->sv1 = newSVsv (fh_or_path);
		755	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		756
		757	if (SvPOK (req->sv1))
		758	{
		759	req->type = EIO_TRUNCATE;
		760	req->ptr1 = SvPVbyte_nolen (req->sv1);
		761	}
		762	else
		763	{
		764	req->type = EIO_FTRUNCATE;
		765	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		766	}
		767
		768	REQ_SEND;
		769	}
		770
		771	void
		772	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		773	ALIAS:
		774	aio_chmod = EIO_CHMOD
		775	aio_mkdir = EIO_MKDIR
		776	PPCODE:
		777	{
		778	dREQ;
		779
		780	req->int2 = mode;
		781	req->sv1 = newSVsv (fh_or_path);
		782
		783	if (SvPOK (req->sv1))
		784	{
		785	req->type = ix;
		786	req->ptr1 = SvPVbyte_nolen (req->sv1);
		787	}
		788	else
		789	{
		790	req->type = EIO_FCHMOD;
		791	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		792	}
		793
		794	REQ_SEND;
		795	}
		796
		797	void
		798	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		799	PPCODE:
		800	{
		801	dREQ;
		802
		803	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		804	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		805	req->sv1 = newSVsv (fh_or_path);
		806
		807	if (SvPOK (req->sv1))
		808	{
		809	req->type = EIO_CHOWN;
		810	req->ptr1 = SvPVbyte_nolen (req->sv1);
		811	}
		812	else
		813	{
		814	req->type = EIO_FCHOWN;
		815	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		816	}
		817
		818	REQ_SEND;
		819	}
		820
		821	void
		822	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		823	ALIAS:
		824	aio_unlink = EIO_UNLINK
		825	aio_rmdir = EIO_RMDIR
		826	aio_readdir = EIO_READDIR
		827	PPCODE:
		828	{
		829	dREQ;
		830
		831	req->type = ix;
		832	req->sv1 = newSVsv (pathname);
		833	req->ptr1 = SvPVbyte_nolen (req->sv1);
		834
		835	REQ_SEND;
		836	}
		837
		838	void
		839	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		840	ALIAS:
		841	aio_link = EIO_LINK
		842	aio_symlink = EIO_SYMLINK
		843	aio_rename = EIO_RENAME
		844	PPCODE:
		845	{
		846	dREQ;
		847
		848	req->type = ix;
		849	req->sv1 = newSVsv (oldpath);
		850	req->ptr1 = SvPVbyte_nolen (req->sv1);
		851	req->sv2 = newSVsv (newpath);
		852	req->ptr2 = SvPVbyte_nolen (req->sv2);
		853
		854	REQ_SEND;
		855	}
		856
		857	void
		858	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		859	PPCODE:
		860	{
		861	dREQ;
		862
		863	req->type = EIO_MKNOD;
		864	req->sv1 = newSVsv (pathname);
		865	req->ptr1 = SvPVbyte_nolen (req->sv1);
		866	req->int2 = (mode_t)mode;
		867	req->offs = dev;
		868
		869	REQ_SEND;
		870	}
		871
		872	void
		873	aio_busy (double delay, SV *callback=&PL_sv_undef)
		874	PPCODE:
		875	{
		876	dREQ;
		877
		878	req->type = EIO_BUSY;
		879	req->nv1 = delay < 0. ? 0. : delay;
		880
		881	REQ_SEND;
		882	}
		883
		884	void
		885	aio_group (SV *callback=&PL_sv_undef)
		886	PROTOTYPE: ;$
		887	PPCODE:
		888	{
		889	dREQ;
		890
		891	req->type = EIO_GROUP;
		892
		893	eio_submit (req);
		894	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		895	}
		896
		897	void
		898	aio_nop (SV *callback=&PL_sv_undef)
		899	ALIAS:
		900	aio_nop = EIO_NOP
		901	aio_sync = EIO_SYNC
		902	PPCODE:
		903	{
		904	dREQ;
		905
		906	req->type = ix;
		907
		908	REQ_SEND;
		909	}
		910
		911	int
		912	aioreq_pri (int pri = 0)
		913	PROTOTYPE: ;$
		914	CODE:
		915	RETVAL = next_pri;
		916	if (items > 0)
		917	{
		918	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		919	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		920	next_pri = pri;
		921	}
		922	OUTPUT:
		923	RETVAL
		924
		925	void
		926	aioreq_nice (int nice = 0)
		927	CODE:
		928	nice = next_pri - nice;
		929	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		930	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		931	next_pri = nice;
		932
		933	void
		934	flush ()
		935	PROTOTYPE:
		936	CODE:
		937	while (eio_nreqs ())
433	{	938	{
434	poll_wait ();	939	poll_wait ();
435	poll_cb ();	940	poll_cb ();
436	}	941	}
437	}
438		942
439	int	943	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()	944	poll()
660	PROTOTYPE:	945	PROTOTYPE:
661	CODE:	946	CODE:
662	if (nreqs)
663	{
664	poll_wait ();	947	poll_wait ();
665	poll_cb ();	948	RETVAL = poll_cb ();
666	}	949	OUTPUT:
		950	RETVAL
667		951
668	int	952	int
669	poll_fileno()	953	poll_fileno()
670	PROTOTYPE:	954	PROTOTYPE:
671	CODE:	955	CODE:
…		…
683		967
684	void	968	void
685	poll_wait()	969	poll_wait()
686	PROTOTYPE:	970	PROTOTYPE:
687	CODE:	971	CODE:
688	if (nreqs)
689	poll_wait ();	972	poll_wait ();
690		973
691	int	974	int
692	nreqs()	975	nreqs()
693	PROTOTYPE:	976	PROTOTYPE:
694	CODE:	977	CODE:
695	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
696	OUTPUT:	979	OUTPUT:
697	RETVAL	980	RETVAL
698		981
		982	int
		983	nready()
		984	PROTOTYPE:
		985	CODE:
		986	RETVAL = eio_nready ();
		987	OUTPUT:
		988	RETVAL
		989
		990	int
		991	npending()
		992	PROTOTYPE:
		993	CODE:
		994	RETVAL = eio_npending ();
		995	OUTPUT:
		996	RETVAL
		997
		998	int
		999	nthreads()
		1000	PROTOTYPE:
		1001	CODE:
		1002	RETVAL = eio_nthreads ();
		1003	OUTPUT:
		1004	RETVAL
		1005
		1006	void _on_next_submit (SV *cb)
		1007	CODE:
		1008	SvREFCNT_dec (on_next_submit);
		1009	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1010
		1011	PROTOTYPES: DISABLE
		1012
		1013	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1014
		1015	void
		1016	cancel (aio_req_ornot req)
		1017	CODE:
		1018	eio_cancel (req);
		1019
		1020	void
		1021	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1022	CODE:
		1023	SvREFCNT_dec (req->callback);
		1024	req->callback = newSVsv (callback);
		1025
		1026	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1027
		1028	void
		1029	add (aio_req grp, ...)
		1030	PPCODE:
		1031	{
		1032	int i;
		1033
		1034	if (grp->int1 == 2)
		1035	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1036
		1037	for (i = 1; i < items; ++i )
		1038	{
		1039	aio_req req;
		1040
		1041	if (GIMME_V != G_VOID)
		1042	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1043
		1044	req = SvAIO_REQ (ST (i));
		1045
		1046	if (req)
		1047	eio_grp_add (grp, req);
		1048	}
		1049	}
		1050
		1051	void
		1052	cancel_subs (aio_req_ornot req)
		1053	CODE:
		1054	req_cancel_subs (req);
		1055
		1056	void
		1057	result (aio_req grp, ...)
		1058	CODE:
		1059	{
		1060	int i;
		1061	AV *av;
		1062
		1063	grp->errorno = errno;
		1064
		1065	av = newAV ();
		1066
		1067	for (i = 1; i < items; ++i )
		1068	av_push (av, newSVsv (ST (i)));
		1069
		1070	SvREFCNT_dec (grp->sv1);
		1071	grp->sv1 = (SV *)av;
		1072	}
		1073
		1074	void
		1075	errno (aio_req grp, int errorno = errno)
		1076	CODE:
		1077	grp->errorno = errorno;
		1078
		1079	void
		1080	limit (aio_req grp, int limit)
		1081	CODE:
		1082	eio_grp_limit (grp, limit);
		1083
		1084	void
		1085	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1086	CODE:
		1087	{
		1088	SvREFCNT_dec (grp->sv2);
		1089	grp->sv2 = newSVsv (callback);
		1090
		1091	if (grp->int2 <= 0)
		1092	grp->int2 = 2;
		1093
		1094	eio_grp_limit (grp, grp->int2);
		1095	}
		1096

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