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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.15 by root, Sat Jul 23 18:19:56 2005 UTC vs.
Revision 1.124 by root, Thu May 29 03:20:40 2008 UTC

		1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
		9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
5	#include <sys/types.h>	12	#include <sys/types.h>
6	#include <sys/stat.h>	13	#include <sys/stat.h>
7
8	#include <unistd.h>	14	#include <limits.h>
9	#include <fcntl.h>	15	#include <fcntl.h>
10	#include <signal.h>
11	#include <sched.h>	16	#include <sched.h>
12	#if __linux	17
		18	/* perl namespace pollution */
		19	#undef VERSION
		20
		21	#ifdef _WIN32
		22
		23	# define EIO_STRUCT_DIRENT Direntry_t
		24	# undef malloc
		25	# undef free
		26
		27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
		59	#else
		60
		61	# include <sys/time.h>
13	#include <sys/syscall.h>	62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
14	#endif	68	#endif
15		69
16	#include <pthread.h>	70	#define EIO_STRUCT_STAT Stat_t
17		71
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	72	/* use NV for 32 bit perls as it allows larger offsets */
19	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	73	#if IVSIZE >= 8
20	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	74	# define SvVAL64 SvIV
21
22	#if __ia64
23	# define STACKSIZE 65536
24	#else	75	#else
25	# define STACKSIZE 4096	76	# define SvVAL64 SvNV
26	#endif	77	#endif
27		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
28	enum {	102	enum {
29	REQ_QUIT,	103	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
30	REQ_OPEN, REQ_CLOSE,
31	REQ_READ, REQ_WRITE, REQ_READAHEAD,
32	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
33	REQ_FSYNC, REQ_FDATASYNC,
34	};	104	};
35		105
36	typedef struct aio_cb {	106	#include "libeio/eio.c"
37	struct aio_cb *volatile next;
38		107
39	int type;
40
41	int fd;
42	off_t offset;
43	size_t length;
44	ssize_t result;
45	mode_t mode; /* open */
46	int errorno;
47	SV *data, *callback, *fh;
48	void *dataptr;
49	STRLEN dataoffset;
50
51	Stat_t *statdata;
52	} aio_cb;
53
54	typedef aio_cb *aio_req;	108	typedef eio_req *aio_req;
		109	typedef eio_req *aio_req_ornot;
55		110
56	static int started;	111	static SV *on_next_submit;
57	static volatile int nreqs;	112	static int next_pri = EIO_PRI_DEFAULT;
58	static int max_outstanding = 1<<30;	113	static int max_outstanding;
59	static int respipe [2];
60		114
61	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	115	static int respipe_osf [2], respipe [2] = { -1, -1 };
62	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
63	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
64		116
65	static volatile aio_req reqs, reqe; /* queue start, queue end */	117	static void req_destroy (aio_req req);
66	static volatile aio_req ress, rese; /* queue start, queue end */	118	static void req_cancel (aio_req req);
67		119
68	static void	120	static void want_poll (void)
69	poll_wait ()
70	{	121	{
71	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)
72	{	138	{
73	fd_set rfd;	139	req->self = (SV *)newHV ();
74	FD_ZERO(&rfd);	140	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
75	FD_SET(respipe [0], &rfd);
76
77	select (respipe [0] + 1, &rfd, 0, 0, 0);
78	}	141	}
79	}
80		142
81	static int	143	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
82	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)
83	{	194	{
84	dSP;	195	dSP;
85	int count = 0;
86	aio_req req, prv;
87		196
88	pthread_mutex_lock (&reslock);	197	if (req->flags & FLAG_SV2_RO_OFF)
		198	SvREADONLY_off (req->sv2);
89		199
90	{	200	if (!EIO_CANCELLED (req) && SvOK (req->callback))
91	/* read any signals sent by the worker threads */
92	char buf [32];
93	while (read (respipe [0], buf, 32) > 0)
94	;
95	}
96
97	req = ress;
98	ress = rese = 0;
99
100	pthread_mutex_unlock (&reslock);
101
102	while (req)
103	{	201	{
104	nreqs--;	202	ENTER;
		203	SAVETMPS;
		204	PUSHMARK (SP);
		205	EXTEND (SP, 1);
105		206
106	if (req->type == REQ_QUIT)	207	switch (req->type)
107	started--;
108	else
109	{	208	{
110	int errorno = errno;	209	case EIO_READDIR:
111	errno = req->errorno;
112
113	if (req->type == REQ_READ)
114	SvCUR_set (req->data, req->dataoffset
115	+ req->result > 0 ? req->result : 0);
116
117	if (req->data)
118	SvREFCNT_dec (req->data);
119
120	if (req->fh)
121	SvREFCNT_dec (req->fh);
122
123	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
124	{	210	{
125	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	211	SV *rv = &PL_sv_undef;
126	PL_laststatval = req->result;
127	PL_statcache = *(req->statdata);
128		212
129	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);
130	}	233	}
		234	break;
131		235
132	ENTER;	236	case EIO_OPEN:
133	PUSHMARK (SP);
134	XPUSHs (sv_2mortal (newSViv (req->result)));
135
136	if (req->type == REQ_OPEN)
137	{	237	{
138	/* convert fd to fh */	238	/* convert fd to fh */
139	SV *fh;	239	SV *fh = &PL_sv_undef;
140		240
141	PUTBACK;	241	if (req->result >= 0)
142	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	242	{
143	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);
144		250
145	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	);
146		258
		259	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		260	fh = (SV *)gv;
		261	}
		262
147	PUSHMARK (SP);	263	PUSHs (fh);
148	XPUSHs (sv_2mortal (fh));
149	}	264	}
150
151	if (SvOK (req->callback))
152	{
153	PUTBACK;
154	call_sv (req->callback, G_VOID | G_EVAL);
155	SPAGAIN;
156	}
157
158	LEAVE;
159
160	if (req->callback)
161	SvREFCNT_dec (req->callback);
162
163	errno = errorno;
164	count++;
165	}
166
167	prv = req;
168	req = req->next;
169	Safefree (prv);
170
171	/* TODO: croak on errors? */
172	}
173
174	return count;
175	}
176
177	static void *aio_proc(void *arg);
178
179	static void
180	start_thread (void)
181	{
182	sigset_t fullsigset, oldsigset;
183	pthread_t tid;
184	pthread_attr_t attr;
185
186	pthread_attr_init (&attr);
187	pthread_attr_setstacksize (&attr, STACKSIZE);
188	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
189
190	sigfillset (&fullsigset);
191	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
192
193	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
194	started++;
195
196	sigprocmask (SIG_SETMASK, &oldsigset, 0);
197	}
198
199	static void
200	send_req (aio_req req)
201	{
202	nreqs++;
203
204	pthread_mutex_lock (&reqlock);
205
206	req->next = 0;
207
208	if (reqe)
209	{
210	reqe->next = req;
211	reqe = req;
212	}
213	else
214	reqe = reqs = req;
215
216	pthread_cond_signal (&reqwait);
217	pthread_mutex_unlock (&reqlock);
218
219	while (nreqs > max_outstanding)
220	{
221	poll_wait ();
222	poll_cb ();
223	}
224	}
225
226	static void
227	end_thread (void)
228	{
229	aio_req req;
230	New (0, req, 1, aio_cb);
231	req->type = REQ_QUIT;
232
233	send_req (req);
234	}
235
236	static void *
237	aio_proc (void *thr_arg)
238	{
239	aio_req req;
240	int type;
241
242	do
243	{
244	pthread_mutex_lock (&reqlock);
245
246	for (;;)
247	{
248	req = reqs;
249
250	if (reqs)
251	{
252	reqs = reqs->next;
253	if (!reqs) reqe = 0;
254	}
255
256	if (req)
257	break;	265	break;
258		266
259	pthread_cond_wait (&reqwait, &reqlock);	267	case EIO_GROUP:
260	}	268	req->int1 = 2; /* mark group as finished */
261		269
262	pthread_mutex_unlock (&reqlock);	270	if (req->sv1)
263
264	errno = 0; /* strictly unnecessary */
265
266	type = req->type;
267
268	switch (type)
269	{	271	{
270	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	272	int i;
271	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	273	AV *av = (AV *)req->sv1;
272	#if SYS_readahead
273	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
274	#else
275	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
276	#endif
277		274
278	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	275	EXTEND (SP, AvFILL (av) + 1);
279	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	276	for (i = 0; i <= AvFILL (av); ++i)
280	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	277	PUSHs (*av_fetch (av, i, 0));
281		278	}
282	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
283	case REQ_CLOSE: req->result = close (req->fd); break;
284	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
285
286	case REQ_FSYNC: req->result = fsync (req->fd); break;
287	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
288
289	case REQ_QUIT:
290	break;	279	break;
291		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
292	default:	310	default:
293	req->result = ENOSYS;	311	PUSHs (sv_2mortal (newSViv (req->result)));
294	break;	312	break;
295	}	313	}
296		314
297	req->errorno = errno;	315	errno = req->errorno;
298		316
299	pthread_mutex_lock (&reslock);	317	PUTBACK;
		318	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		319	SPAGAIN;
300		320
301	req->next = 0;	321	FREETMPS;
		322	LEAVE;
302		323
303	if (rese)	324	PUTBACK;
304	{
305	rese->next = req;
306	rese = req;
307	}
308	else
309	{
310	rese = ress = req;
311
312	/* write a dummy byte to the pipe so fh becomes ready */
313	write (respipe [1], &respipe, 1);
314	}
315
316	pthread_mutex_unlock (&reslock);
317	}	325	}
318	while (type != REQ_QUIT);
319		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)
320	return 0;	350	return;
321	}
322		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	for (;;)
		429	{
		430	int res = eio_poll ();
		431
		432	if (res > 0)
		433	croak (0);
		434
		435	if (!max_outstanding || max_outstanding > eio_nreqs ())
		436	return res;
		437
		438	poll_wait ();
		439	}
		440	}
		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
323	MODULE = IO::AIO PACKAGE = IO::AIO	468	MODULE = IO::AIO PACKAGE = IO::AIO
324		469
325	PROTOTYPES: ENABLE	470	PROTOTYPES: ENABLE
326		471
327	BOOT:	472	BOOT:
328	{	473	{
329	if (pipe (respipe))	474	stash = gv_stashpv ("IO::AIO", 1);
330	croak ("unable to initialize result pipe");
331		475
332	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	476	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
333	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
334		484
335	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	485	create_respipe ();
336	croak ("cannot set result pipe to nonblocking mode");
337	}
338		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
339	void	494	void
340	min_parallel(nthreads)	495	max_poll_reqs (int nreqs)
341	int nthreads
342	PROTOTYPE: $	496	PROTOTYPE: $
343	CODE:	497	CODE:
344	while (nthreads > started)	498	eio_set_max_poll_reqs (nreqs);
345	start_thread ();
346		499
347	void	500	void
348	max_parallel(nthreads)	501	max_poll_time (double nseconds)
349	int nthreads
350	PROTOTYPE: $	502	PROTOTYPE: $
351	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: $$$;$
		533	PPCODE:
352	{	534	{
353	int cur = started;	535	dREQ;
354	while (cur > nthreads)	536
355	{	537	req->type = EIO_OPEN;
356	end_thread ();	538	req->sv1 = newSVsv (pathname);
		539	req->ptr1 = SvPVbyte_nolen (req->sv1);
		540	req->int1 = flags;
		541	req->int2 = mode;
		542
		543	REQ_SEND;
		544	}
		545
		546	void
		547	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		548	PROTOTYPE: $;$
		549	ALIAS:
		550	aio_fsync = EIO_FSYNC
		551	aio_fdatasync = EIO_FDATASYNC
		552	PPCODE:
		553	{
		554	dREQ;
		555
		556	req->type = ix;
		557	req->sv1 = newSVsv (fh);
		558	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		559
		560	REQ_SEND (req);
		561	}
		562
		563	void
		564	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		565	PROTOTYPE: $;$
		566	PPCODE:
		567	{
		568	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		569	dREQ;
		570
		571	if (close_pipe < 0)
		572	{
		573	int pipefd [2];
		574
		575	if (pipe (pipefd) < 0
		576	|| close (pipefd [1]) < 0
		577	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		578	abort (); /*D*/
		579
		580	close_pipe = pipefd [0];
		581	}
		582
		583	req->type = EIO_DUP2;
		584	req->int1 = close_pipe;
		585	req->sv2 = newSVsv (fh);
		586	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		587
		588	REQ_SEND (req);
		589	}
		590
		591	void
		592	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		593	ALIAS:
		594	aio_read = EIO_READ
		595	aio_write = EIO_WRITE
		596	PROTOTYPE: $$$$$;$
		597	PPCODE:
		598	{
		599	STRLEN svlen;
		600	char *svptr = SvPVbyte (data, svlen);
		601	UV len = SvUV (length);
		602
		603	SvUPGRADE (data, SVt_PV);
		604	SvPOK_on (data);
		605
		606	if (dataoffset < 0)
		607	dataoffset += svlen;
		608
		609	if (dataoffset < 0 || dataoffset > svlen)
		610	croak ("dataoffset outside of data scalar");
		611
		612	if (ix == EIO_WRITE)
		613	{
		614	/* write: check length and adjust. */
		615	if (!SvOK (length) || len + dataoffset > svlen)
		616	len = svlen - dataoffset;
		617	}
		618	else
		619	{
		620	/* read: grow scalar as necessary */
		621	svptr = SvGROW (data, len + dataoffset + 1);
		622	}
		623
		624	if (len < 0)
		625	croak ("length must not be negative");
		626
		627	{
		628	dREQ;
		629
		630	req->type = ix;
		631	req->sv1 = newSVsv (fh);
		632	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		633	: IoOFP (sv_2io (fh)));
		634	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		635	req->size = len;
		636	req->sv2 = SvREFCNT_inc (data);
		637	req->ptr2 = (char *)svptr + dataoffset;
		638	req->stroffset = dataoffset;
		639
		640	if (!SvREADONLY (data))
357	cur--;	641	{
		642	SvREADONLY_on (data);
		643	req->flags |= FLAG_SV2_RO_OFF;
358	}	644	}
359		645
360	while (started > nthreads)	646	REQ_SEND;
		647	}
		648	}
		649
		650	void
		651	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		652	PROTOTYPE: $$;$
		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 ())
361	{	938	{
362	poll_wait ();	939	poll_wait ();
363	poll_cb ();	940	poll_cb ();
364	}	941	}
365	}
366		942
367	int	943	int
368	max_outstanding(nreqs)
369	int nreqs
370	PROTOTYPE: $
371	CODE:
372	RETVAL = max_outstanding;
373	max_outstanding = nreqs;
374
375	void
376	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
377	SV * pathname
378	int flags
379	int mode
380	SV * callback
381	PROTOTYPE: $$$;$
382	CODE:
383	{
384	aio_req req;
385
386	Newz (0, req, 1, aio_cb);
387
388	if (!req)
389	croak ("out of memory during aio_req allocation");
390
391	req->type = REQ_OPEN;
392	req->data = newSVsv (pathname);
393	req->dataptr = SvPV_nolen (req->data);
394	req->fd = flags;
395	req->mode = mode;
396	req->callback = SvREFCNT_inc (callback);
397
398	send_req (req);
399	}
400
401	void
402	aio_close(fh,callback=&PL_sv_undef)
403	SV * fh
404	SV * callback
405	PROTOTYPE: $;$
406	ALIAS:
407	aio_close = REQ_CLOSE
408	aio_fsync = REQ_FSYNC
409	aio_fdatasync = REQ_FDATASYNC
410	CODE:
411	{
412	aio_req req;
413
414	Newz (0, req, 1, aio_cb);
415
416	if (!req)
417	croak ("out of memory during aio_req allocation");
418
419	req->type = ix;
420	req->fh = newSVsv (fh);
421	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
422	req->callback = SvREFCNT_inc (callback);
423
424	send_req (req);
425	}
426
427	void
428	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
429	SV * fh
430	UV offset
431	IV length
432	SV * data
433	IV dataoffset
434	SV * callback
435	ALIAS:
436	aio_read = REQ_READ
437	aio_write = REQ_WRITE
438	PROTOTYPE: $$$$$;$
439	CODE:
440	{
441	aio_req req;
442	STRLEN svlen;
443	char *svptr = SvPV (data, svlen);
444
445	SvUPGRADE (data, SVt_PV);
446	SvPOK_on (data);
447
448	if (dataoffset < 0)
449	dataoffset += svlen;
450
451	if (dataoffset < 0 || dataoffset > svlen)
452	croak ("data offset outside of string");
453
454	if (ix == REQ_WRITE)
455	{
456	/* write: check length and adjust. */
457	if (length < 0 || length + dataoffset > svlen)
458	length = svlen - dataoffset;
459	}
460	else
461	{
462	/* read: grow scalar as necessary */
463	svptr = SvGROW (data, length + dataoffset);
464	}
465
466	if (length < 0)
467	croak ("length must not be negative");
468
469	Newz (0, req, 1, aio_cb);
470
471	if (!req)
472	croak ("out of memory during aio_req allocation");
473
474	req->type = ix;
475	req->fh = newSVsv (fh);
476	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
477	: IoOFP (sv_2io (fh)));
478	req->offset = offset;
479	req->length = length;
480	req->data = SvREFCNT_inc (data);
481	req->dataptr = (char *)svptr + dataoffset;
482	req->callback = SvREFCNT_inc (callback);
483
484	send_req (req);
485	}
486
487	void
488	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
489	SV * fh
490	UV offset
491	IV length
492	SV * callback
493	PROTOTYPE: $$$;$
494	CODE:
495	{
496	aio_req req;
497
498	if (length < 0)
499	croak ("length must not be negative");
500
501	Newz (0, req, 1, aio_cb);
502
503	if (!req)
504	croak ("out of memory during aio_req allocation");
505
506	req->type = REQ_READAHEAD;
507	req->fh = newSVsv (fh);
508	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
509	req->offset = offset;
510	req->length = length;
511	req->callback = SvREFCNT_inc (callback);
512
513	send_req (req);
514	}
515
516	void
517	aio_stat(fh_or_path,callback=&PL_sv_undef)
518	SV * fh_or_path
519	SV * callback
520	ALIAS:
521	aio_stat = REQ_STAT
522	aio_lstat = REQ_LSTAT
523	CODE:
524	{
525	aio_req req;
526
527	Newz (0, req, 1, aio_cb);
528
529	if (!req)
530	croak ("out of memory during aio_req allocation");
531
532	New (0, req->statdata, 1, Stat_t);
533
534	if (!req->statdata)
535	croak ("out of memory during aio_req->statdata allocation");
536
537	if (SvPOK (fh_or_path))
538	{
539	req->type = ix;
540	req->data = newSVsv (fh_or_path);
541	req->dataptr = SvPV_nolen (req->data);
542	}
543	else
544	{
545	req->type = REQ_FSTAT;
546	req->fh = newSVsv (fh_or_path);
547	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548	}
549
550	req->callback = SvREFCNT_inc (callback);
551
552	send_req (req);
553	}
554
555	void
556	aio_unlink(pathname,callback=&PL_sv_undef)
557	SV * pathname
558	SV * callback
559	CODE:
560	{
561	aio_req req;
562
563	Newz (0, req, 1, aio_cb);
564
565	if (!req)
566	croak ("out of memory during aio_req allocation");
567
568	req->type = REQ_UNLINK;
569	req->data = newSVsv (pathname);
570	req->dataptr = SvPV_nolen (req->data);
571	req->callback = SvREFCNT_inc (callback);
572
573	send_req (req);
574	}
575
576	void
577	flush()
578	PROTOTYPE:
579	CODE:
580	while (nreqs)
581	{
582	poll_wait ();
583	poll_cb ();
584	}
585
586	void
587	poll()	944	poll()
588	PROTOTYPE:	945	PROTOTYPE:
589	CODE:	946	CODE:
590	if (nreqs)
591	{
592	poll_wait ();	947	poll_wait ();
593	poll_cb ();	948	RETVAL = poll_cb ();
594	}	949	OUTPUT:
		950	RETVAL
595		951
596	int	952	int
597	poll_fileno()	953	poll_fileno()
598	PROTOTYPE:	954	PROTOTYPE:
599	CODE:	955	CODE:
…		…
611		967
612	void	968	void
613	poll_wait()	969	poll_wait()
614	PROTOTYPE:	970	PROTOTYPE:
615	CODE:	971	CODE:
616	if (nreqs)
617	poll_wait ();	972	poll_wait ();
618		973
619	int	974	int
620	nreqs()	975	nreqs()
621	PROTOTYPE:	976	PROTOTYPE:
622	CODE:	977	CODE:
623	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
624	OUTPUT:	979	OUTPUT:
625	RETVAL	980	RETVAL
626		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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