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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.2 by root, Sun Jul 10 18:16:49 2005 UTC vs.
Revision 1.129 by root, Tue Sep 30 17:03:53 2008 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
		9	#include <stddef.h>
		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	#include <unistd.h>	14	#include <limits.h>
10	#include <fcntl.h>	15	#include <fcntl.h>
11	#include <signal.h>
12	#include <sched.h>	16	#include <sched.h>
13	#include <endian.h>
14		17
15	#include <pthread.h>	18	/* perl namespace pollution */
16	#include <sys/syscall.h>	19	#undef VERSION
17		20
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	#ifdef _WIN32
19	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
20	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
21		22
22	#if __i386 || __amd64	23	# define EIO_STRUCT_DIRENT Direntry_t
23	# define STACKSIZE ( 256 * sizeof (long))	24	# undef malloc
24	#elif __ia64	25	# undef free
25	# define STACKSIZE (8192 * sizeof (long))	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
26	#else	59	#else
27	# define STACKSIZE ( 512 * sizeof (long))	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
28	#endif	68	#endif
29		69
		70	/* perl stupidly overrides readdir and maybe others */
		71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
		83	#endif
		84
		85	/*****************************************************************************/
		86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
		91	#endif
		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	static HV *stash;
		99	typedef SV SV8; /* byte-sv, used for argument-checking */
		100
		101	#define AIO_REQ_KLASS "IO::AIO::REQ"
		102	#define AIO_GRP_KLASS "IO::AIO::GRP"
		103
		104	#define EIO_REQ_MEMBERS \
		105	SV *callback; \
		106	SV *sv1, *sv2; \
		107	STRLEN stroffset; \
		108	SV *self;
		109
		110	#define EIO_NO_WRAPPERS 1
		111
		112	#include "libeio/eio.h"
		113
		114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void aio_grp_feed (eio_req *grp);
		117	#define EIO_FEED(req) aio_grp_feed (req)
		118	static void req_destroy (eio_req *grp);
		119	#define EIO_DESTROY(req) req_destroy (req)
		120
30	enum {	121	enum {
31	REQ_QUIT,	122	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
35	REQ_FSYNC, REQ_FDATASYNC,
36	};	123	};
37		124
38	typedef struct aio_cb {	125	#include "libeio/eio.c"
39	struct aio_cb *next;
40		126
41	int type;
42
43	int fd;
44	off_t offset;
45	size_t length;
46	ssize_t result;
47	mode_t mode; /* open */
48	int errorno;
49	SV *data, *callback;
50	void *dataptr;
51	STRLEN dataoffset;
52
53	Stat_t *statdata;
54	} aio_cb;
55
56	typedef aio_cb *aio_req;	127	typedef eio_req *aio_req;
		128	typedef eio_req *aio_req_ornot;
57		129
58	static int started;	130	static SV *on_next_submit;
59	static int nreqs;	131	static int next_pri = EIO_PRI_DEFAULT;
60	static int reqpipe[2], respipe[2];	132	static int max_outstanding;
61		133
62	static aio_req qs, qe; /* queue start, queue end */	134	static int respipe_osf [2], respipe [2] = { -1, -1 };
63		135
64	static void *aio_proc(void *arg);	136	static void req_destroy (aio_req req);
		137	static void req_cancel (aio_req req);
65		138
66	static void	139	static void want_poll (void)
67	start_thread (void)
68	{	140	{
69	sigset_t fullsigset, oldsigset;	141	/* write a dummy byte to the pipe so fh becomes ready */
70	pthread_t tid;	142	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
71	pthread_attr_t attr;
72
73	pthread_attr_init (&attr);
74	pthread_attr_setstacksize (&attr, STACKSIZE);
75	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
76
77	sigfillset (&fullsigset);
78	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79
80	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
81	started++;
82
83	sigprocmask (SIG_SETMASK, &oldsigset, 0);
84	}	143	}
85		144
86	static void	145	static void done_poll (void)
87	send_reqs (void)
88	{	146	{
89	/* this write is atomic */	147	/* read any signals sent by the worker threads */
90	while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)	148	char buf [4];
91	{	149	while (respipe_read (respipe [0], buf, 4) == 4)
92	qs = qs->next;	150	;
93	if (!qs) qe = 0;
94	}
95	}	151	}
96		152
97	static void	153	/* must be called at most once */
98	send_req (aio_req req)	154	static SV *req_sv (aio_req req, const char *klass)
99	{	155	{
100	nreqs++;	156	if (!req->self)
101	req->next = 0;
102
103	if (qe)
104	{	157	{
105	qe->next = req;	158	req->self = (SV *)newHV ();
106	qe = req;	159	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
107	}	160	}
108	else
109	qe = qs = req;
110		161
111	send_reqs ();	162	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
112	}	163	}
113		164
114	static void	165	static aio_req SvAIO_REQ (SV *sv)
115	end_thread (void)
116	{	166	{
117	aio_req req;	167	MAGIC *mg;
118	New (0, req, 1, aio_cb);
119	req->type = REQ_QUIT;
120		168
121	send_req (req);	169	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
122	}	170	croak ("object of class " AIO_REQ_KLASS " expected");
123		171
124	static void	172	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
125	read_write (pTHX_
126	int dowrite, int fd, off_t offset, size_t length,
127	SV *data, STRLEN dataoffset, SV *callback)
128	{
129	aio_req req;
130	STRLEN svlen;
131	char *svptr = SvPV (data, svlen);
132		173
133	SvUPGRADE (data, SVt_PV);	174	return mg ? (aio_req)mg->mg_ptr : 0;
134	SvPOK_on (data);	175	}
135		176
136	if (dataoffset < 0)	177	static void aio_grp_feed (aio_req grp)
137	dataoffset += svlen;	178	{
138		179	if (grp->sv2 && SvOK (grp->sv2))
139	if (dataoffset < 0 || dataoffset > svlen)
140	croak ("data offset outside of string");
141
142	if (dowrite)
143	{	180	{
144	/* write: check length and adjust. */	181	dSP;
145	if (length < 0 || length + dataoffset > svlen)	182
146	length = svlen - dataoffset;	183	ENTER;
		184	SAVETMPS;
		185	PUSHMARK (SP);
		186	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		187	PUTBACK;
		188	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		189	SPAGAIN;
		190	FREETMPS;
		191	LEAVE;
147	}	192	}
148	else	193	}
		194
		195	static void req_submit (eio_req *req)
		196	{
		197	eio_submit (req);
		198
		199	if (expect_false (on_next_submit))
149	{	200	{
150	/* read: grow scalar as necessary */	201	dSP;
151	svptr = SvGROW (data, length + dataoffset);	202	SV *cb = sv_2mortal (on_next_submit);
		203
		204	on_next_submit = 0;
		205
		206	PUSHMARK (SP);
		207	PUTBACK;
		208	call_sv (cb, G_DISCARD | G_EVAL);
152	}	209	}
153
154	if (length < 0)
155	croak ("length must not be negative");
156
157	Newz (0, req, 1, aio_cb);
158
159	if (!req)
160	croak ("out of memory during aio_req allocation");
161
162	req->type = dowrite ? REQ_WRITE : REQ_READ;
163	req->fd = fd;
164	req->offset = offset;
165	req->length = length;
166	req->data = SvREFCNT_inc (data);
167	req->dataptr = (char *)svptr + dataoffset;
168	req->callback = SvREFCNT_inc (callback);
169
170	send_req (req);
171	}	210	}
172		211
173	static void	212	static int req_invoke (eio_req *req)
174	poll_wait ()
175	{
176	fd_set rfd;
177	FD_ZERO(&rfd);
178	FD_SET(respipe[0], &rfd);
179
180	select (respipe[0] + 1, &rfd, 0, 0, 0);
181	}
182
183	static int
184	poll_cb (pTHX)
185	{	213	{
186	dSP;	214	dSP;
187	int count = 0;
188	aio_req req;
189		215
190	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))	216	if (req->flags & FLAG_SV2_RO_OFF)
		217	SvREADONLY_off (req->sv2);
		218
		219	if (!EIO_CANCELLED (req) && req->callback)
191	{	220	{
192	nreqs--;	221	ENTER;
		222	SAVETMPS;
		223	PUSHMARK (SP);
		224	EXTEND (SP, 1);
193		225
194	if (req->type == REQ_QUIT)	226	switch (req->type)
195	started--;
196	else
197	{	227	{
198	int errorno = errno;	228	case EIO_READDIR:
199	errno = req->errorno;
200
201	if (req->type == REQ_READ)
202	SvCUR_set (req->data, req->dataoffset
203	+ req->result > 0 ? req->result : 0);
204
205	if (req->data)
206	SvREFCNT_dec (req->data);
207
208	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209	{	229	{
210	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	230	SV *rv = &PL_sv_undef;
211	PL_laststatval = req->result;
212	PL_statcache = *(req->statdata);
213		231
214	Safefree (req->statdata);	232	if (req->result >= 0)
		233	{
		234	int i;
		235	char *buf = req->ptr2;
		236	AV *av = newAV ();
		237
		238	av_extend (av, req->result - 1);
		239
		240	for (i = 0; i < req->result; ++i)
		241	{
		242	SV *sv = newSVpv (buf, 0);
		243
		244	av_store (av, i, sv);
		245	buf += SvCUR (sv) + 1;
		246	}
		247
		248	rv = sv_2mortal (newRV_noinc ((SV *)av));
		249	}
		250
		251	PUSHs (rv);
215	}	252	}
		253	break;
216		254
217	PUSHMARK (SP);	255	case EIO_OPEN:
218	XPUSHs (sv_2mortal (newSViv (req->result)));
219
220	if (req->type == REQ_OPEN)
221	{	256	{
222	/* convert fd to fh */	257	/* convert fd to fh */
223	SV *fh;	258	SV *fh = &PL_sv_undef;
224		259
225	PUTBACK;	260	if (req->result >= 0)
226	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	261	{
227	SPAGAIN;	262	GV *gv = (GV *)sv_newmortal ();
		263	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		264	char sym [64];
		265	int symlen;
		266
		267	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		268	gv_init (gv, stash, sym, symlen, 0);
228		269
229	fh = POPs;	270	symlen = snprintf (
		271	sym,
		272	sizeof (sym),
		273	"%s&=%d",
		274	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		275	req->result
		276	);
230		277
231	PUSHMARK (SP);	278	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		279	fh = (SV *)gv;
		280	}
		281
232	XPUSHs (fh);	282	PUSHs (fh);
233	}	283	}
		284	break;
234		285
235	PUTBACK;	286	case EIO_GROUP:
236	call_sv (req->callback, G_VOID | G_EVAL);	287	req->int1 = 2; /* mark group as finished */
237	SPAGAIN;	288
		289	if (req->sv1)
238		290	{
239	if (req->callback)	291	int i;
240	SvREFCNT_dec (req->callback);	292	AV *av = (AV *)req->sv1;
241		293
242	errno = errorno;	294	EXTEND (SP, AvFILL (av) + 1);
243	count++;	295	for (i = 0; i <= AvFILL (av); ++i)
		296	PUSHs (*av_fetch (av, i, 0));
244	}	297	}
		298	break;
245		299
246	Safefree (req);	300	case EIO_NOP:
247	}
248
249	if (qs)
250	send_reqs ();
251
252	return count;
253	}
254
255	static void *
256	aio_proc (void *thr_arg)
257	{
258	aio_req req;
259
260	/* then loop */
261	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))
262	{
263	errno = 0; /* strictly unnecessary */
264
265	switch (req->type)
266	{
267	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
268	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
269	#if SYS_readahead
270	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
271	#else
272	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
273	#endif
274
275	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
276	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
277	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
278
279	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
280	case REQ_CLOSE: req->result = close (req->fd); break;
281	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
282
283	case REQ_FSYNC: req->result = fsync (req->fd); break;
284	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
285
286	case REQ_QUIT:	301	case EIO_BUSY:
287	write (respipe[1], (void *)&req, sizeof (req));	302	break;
288	return 0;	303
		304	case EIO_READLINK:
		305	if (req->result > 0)
		306	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		307	break;
		308
		309	case EIO_STAT:
		310	case EIO_LSTAT:
		311	case EIO_FSTAT:
		312	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		313	PL_laststatval = req->result;
		314	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		315	PUSHs (sv_2mortal (newSViv (req->result)));
		316	break;
		317
		318	case EIO_READ:
		319	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		320	*SvEND (req->sv2) = 0;
		321	PUSHs (sv_2mortal (newSViv (req->result)));
		322	break;
		323
		324	case EIO_DUP2:
		325	if (req->result > 0)
		326	req->result = 0;
		327	/* FALLTHROUGH */
289		328
290	default:	329	default:
291	req->result = ENOSYS;	330	PUSHs (sv_2mortal (newSViv (req->result)));
292	break;	331	break;
293	}	332	}
294		333
295	req->errorno = errno;	334	errno = req->errorno;
296	write (respipe[1], (void *)&req, sizeof (req));	335
		336	PUTBACK;
		337	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		338	SPAGAIN;
		339
		340	FREETMPS;
		341	LEAVE;
		342
		343	PUTBACK;
297	}	344	}
298		345
		346	return !!SvTRUE (ERRSV);
		347	}
		348
		349	static void req_destroy (aio_req req)
		350	{
		351	if (req->self)
		352	{
		353	sv_unmagic (req->self, PERL_MAGIC_ext);
		354	SvREFCNT_dec (req->self);
		355	}
		356
		357	SvREFCNT_dec (req->sv1);
		358	SvREFCNT_dec (req->sv2);
		359	SvREFCNT_dec (req->callback);
		360
		361	Safefree (req);
		362	}
		363
		364	static void req_cancel_subs (aio_req grp)
		365	{
		366	aio_req sub;
		367
		368	if (grp->type != EIO_GROUP)
		369	return;
		370
		371	SvREFCNT_dec (grp->sv2);
		372	grp->sv2 = 0;
		373
		374	eio_grp_cancel (grp);
		375	}
		376
		377	#ifdef USE_SOCKETS_AS_HANDLES
		378	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		379	#else
		380	# define TO_SOCKET(x) (x)
		381	#endif
		382
		383	static void
		384	create_respipe (void)
		385	{
		386	int old_readfd = respipe [0];
		387
		388	if (respipe [1] >= 0)
		389	respipe_close (TO_SOCKET (respipe [1]));
		390
		391	#ifdef _WIN32
		392	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		393	#else
		394	if (pipe (respipe))
		395	#endif
		396	croak ("unable to initialize result pipe");
		397
		398	if (old_readfd >= 0)
		399	{
		400	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		401	croak ("unable to initialize result pipe(2)");
		402
		403	respipe_close (respipe [0]);
		404	respipe [0] = old_readfd;
		405	}
		406
		407	#ifdef _WIN32
		408	int arg = 1;
		409	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		410	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		411	#else
		412	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		413	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		414	#endif
		415	croak ("unable to initialize result pipe(3)");
		416
		417	respipe_osf [0] = TO_SOCKET (respipe [0]);
		418	respipe_osf [1] = TO_SOCKET (respipe [1]);
		419	}
		420
		421	static void poll_wait (void)
		422	{
		423	fd_set rfd;
		424
		425	while (eio_nreqs ())
		426	{
		427	int size;
		428
		429	X_LOCK (reslock);
		430	size = res_queue.size;
		431	X_UNLOCK (reslock);
		432
		433	if (size)
		434	return;
		435
		436	etp_maybe_start_thread ();
		437
		438	FD_ZERO (&rfd);
		439	FD_SET (respipe [0], &rfd);
		440
		441	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		442	}
		443	}
		444
		445	static int poll_cb (void)
		446	{
		447	for (;;)
		448	{
		449	int res = eio_poll ();
		450
		451	if (res > 0)
		452	croak (0);
		453
		454	if (!max_outstanding || max_outstanding > eio_nreqs ())
		455	return res;
		456
		457	poll_wait ();
		458	}
		459	}
		460
		461	static void atfork_child (void)
		462	{
		463	create_respipe ();
		464	}
		465
		466	static SV *
		467	get_cb (SV *cb_sv)
		468	{
		469	HV *st;
		470	GV *gvp;
		471	CV *cv;
		472
		473	if (!SvOK (cb_sv))
299	return 0;	474	return 0;
300	}
301		475
		476	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		477
		478	if (!cv)
		479	croak ("IO::AIO callback must be undef or a CODE reference");
		480
		481	return (SV *)cv;
		482	}
		483
		484	#define dREQ \
		485	SV *cb_cv; \
		486	aio_req req; \
		487	int req_pri = next_pri; \
		488	next_pri = EIO_PRI_DEFAULT; \
		489	\
		490	cb_cv = get_cb (callback); \
		491	\
		492	Newz (0, req, 1, eio_req); \
		493	if (!req) \
		494	croak ("out of memory during eio_req allocation"); \
		495	\
		496	req->callback = SvREFCNT_inc (cb_cv); \
		497	req->pri = req_pri
		498
		499	#define REQ_SEND \
		500	PUTBACK; \
		501	req_submit (req); \
		502	SPAGAIN; \
		503	\
		504	if (GIMME_V != G_VOID) \
		505	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		506
302	MODULE = IO::AIO PACKAGE = IO::AIO	507	MODULE = IO::AIO PACKAGE = IO::AIO
303		508
		509	PROTOTYPES: ENABLE
		510
304	BOOT:	511	BOOT:
305	{	512	{
306	if (pipe (reqpipe) || pipe (respipe))	513	stash = gv_stashpv ("IO::AIO", 1);
307	croak ("unable to initialize request or result pipe");
308		514
309	if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))	515	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
310	croak ("cannot set result pipe to nonblocking mode");	516	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		517	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		518	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		519	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		520	#ifndef _WIN32
		521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		522	#endif
311		523
312	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))	524	create_respipe ();
313	croak ("cannot set result pipe to nonblocking mode");
314	}
315		525
		526	if (eio_init (want_poll, done_poll) < 0)
		527	croak ("IO::AIO: unable to initialise eio library");
		528
		529	/* atfork child called in fifo order, so before eio's handler */
		530	X_THREAD_ATFORK (0, 0, atfork_child);
		531	}
		532
316	void	533	void
317	min_parallel(nthreads)	534	max_poll_reqs (int nreqs)
318	int nthreads
319	PROTOTYPE: $	535	PROTOTYPE: $
320	CODE:	536	CODE:
321	while (nthreads > started)	537	eio_set_max_poll_reqs (nreqs);
322	start_thread ();
323		538
324	void	539	void
325	max_parallel(nthreads)	540	max_poll_time (double nseconds)
326	int nthreads
327	PROTOTYPE: $	541	PROTOTYPE: $
328	CODE:	542	CODE:
		543	eio_set_max_poll_time (nseconds);
		544
		545	void
		546	min_parallel (int nthreads)
		547	PROTOTYPE: $
		548	CODE:
		549	eio_set_min_parallel (nthreads);
		550
		551	void
		552	max_parallel (int nthreads)
		553	PROTOTYPE: $
		554	CODE:
		555	eio_set_max_parallel (nthreads);
		556
		557	void
		558	max_idle (int nthreads)
		559	PROTOTYPE: $
		560	CODE:
		561	eio_set_max_idle (nthreads);
		562
		563	void
		564	max_outstanding (int maxreqs)
		565	PROTOTYPE: $
		566	CODE:
		567	max_outstanding = maxreqs;
		568
		569	void
		570	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		571	PROTOTYPE: $$$;$
		572	PPCODE:
329	{	573	{
330	int cur = started;	574	dREQ;
331	while (cur > nthreads)	575
332	{	576	req->type = EIO_OPEN;
333	end_thread ();	577	req->sv1 = newSVsv (pathname);
		578	req->ptr1 = SvPVbyte_nolen (req->sv1);
		579	req->int1 = flags;
		580	req->int2 = mode;
		581
		582	REQ_SEND;
		583	}
		584
		585	void
		586	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		587	PROTOTYPE: $;$
		588	ALIAS:
		589	aio_fsync = EIO_FSYNC
		590	aio_fdatasync = EIO_FDATASYNC
		591	PPCODE:
		592	{
		593	dREQ;
		594
		595	req->type = ix;
		596	req->sv1 = newSVsv (fh);
		597	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		598
		599	REQ_SEND (req);
		600	}
		601
		602	void
		603	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		604	PROTOTYPE: $;$
		605	PPCODE:
		606	{
		607	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		608	dREQ;
		609
		610	if (close_pipe < 0)
		611	{
		612	int pipefd [2];
		613
		614	if (pipe (pipefd) < 0
		615	|| close (pipefd [1]) < 0
		616	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		617	abort (); /*D*/
		618
		619	close_pipe = pipefd [0];
		620	}
		621
		622	req->type = EIO_DUP2;
		623	req->int1 = close_pipe;
		624	req->sv2 = newSVsv (fh);
		625	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		626
		627	REQ_SEND (req);
		628	}
		629
		630	void
		631	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		632	ALIAS:
		633	aio_read = EIO_READ
		634	aio_write = EIO_WRITE
		635	PROTOTYPE: $$$$$;$
		636	PPCODE:
		637	{
		638	STRLEN svlen;
		639	char *svptr = SvPVbyte (data, svlen);
		640	UV len = SvUV (length);
		641
		642	SvUPGRADE (data, SVt_PV);
		643	SvPOK_on (data);
		644
		645	if (dataoffset < 0)
		646	dataoffset += svlen;
		647
		648	if (dataoffset < 0 || dataoffset > svlen)
		649	croak ("dataoffset outside of data scalar");
		650
		651	if (ix == EIO_WRITE)
		652	{
		653	/* write: check length and adjust. */
		654	if (!SvOK (length) || len + dataoffset > svlen)
		655	len = svlen - dataoffset;
		656	}
		657	else
		658	{
		659	/* read: grow scalar as necessary */
		660	svptr = SvGROW (data, len + dataoffset + 1);
		661	}
		662
		663	if (len < 0)
		664	croak ("length must not be negative");
		665
		666	{
		667	dREQ;
		668
		669	req->type = ix;
		670	req->sv1 = newSVsv (fh);
		671	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		672	: IoOFP (sv_2io (fh)));
		673	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		674	req->size = len;
		675	req->sv2 = SvREFCNT_inc (data);
		676	req->ptr2 = (char *)svptr + dataoffset;
		677	req->stroffset = dataoffset;
		678
		679	if (!SvREADONLY (data))
334	cur--;	680	{
		681	SvREADONLY_on (data);
		682	req->flags |= FLAG_SV2_RO_OFF;
335	}	683	}
336		684
337	while (started > nthreads)	685	REQ_SEND;
		686	}
		687	}
		688
		689	void
		690	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		691	PROTOTYPE: $$;$
		692	PPCODE:
		693	{
		694	SV *data;
		695	dREQ;
		696
		697	req->type = EIO_READLINK;
		698	req->sv1 = newSVsv (path);
		699	req->ptr1 = SvPVbyte_nolen (req->sv1);
		700
		701	REQ_SEND;
		702	}
		703
		704	void
		705	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		706	PROTOTYPE: $$$$;$
		707	PPCODE:
		708	{
		709	dREQ;
		710
		711	req->type = EIO_SENDFILE;
		712	req->sv1 = newSVsv (out_fh);
		713	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		714	req->sv2 = newSVsv (in_fh);
		715	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		716	req->offs = SvVAL64 (in_offset);
		717	req->size = length;
		718
		719	REQ_SEND;
		720	}
		721
		722	void
		723	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		724	PROTOTYPE: $$$;$
		725	PPCODE:
		726	{
		727	dREQ;
		728
		729	req->type = EIO_READAHEAD;
		730	req->sv1 = newSVsv (fh);
		731	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		732	req->offs = SvVAL64 (offset);
		733	req->size = length;
		734
		735	REQ_SEND;
		736	}
		737
		738	void
		739	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		740	ALIAS:
		741	aio_stat = EIO_STAT
		742	aio_lstat = EIO_LSTAT
		743	PPCODE:
		744	{
		745	dREQ;
		746
		747	req->sv1 = newSVsv (fh_or_path);
		748
		749	if (SvPOK (req->sv1))
		750	{
		751	req->type = ix;
		752	req->ptr1 = SvPVbyte_nolen (req->sv1);
		753	}
		754	else
		755	{
		756	req->type = EIO_FSTAT;
		757	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		758	}
		759
		760	REQ_SEND;
		761	}
		762
		763	void
		764	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		765	PPCODE:
		766	{
		767	dREQ;
		768
		769	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		770	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		771	req->sv1 = newSVsv (fh_or_path);
		772
		773	if (SvPOK (req->sv1))
		774	{
		775	req->type = EIO_UTIME;
		776	req->ptr1 = SvPVbyte_nolen (req->sv1);
		777	}
		778	else
		779	{
		780	req->type = EIO_FUTIME;
		781	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		782	}
		783
		784	REQ_SEND;
		785	}
		786
		787	void
		788	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		789	PPCODE:
		790	{
		791	dREQ;
		792
		793	req->sv1 = newSVsv (fh_or_path);
		794	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		795
		796	if (SvPOK (req->sv1))
		797	{
		798	req->type = EIO_TRUNCATE;
		799	req->ptr1 = SvPVbyte_nolen (req->sv1);
		800	}
		801	else
		802	{
		803	req->type = EIO_FTRUNCATE;
		804	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		805	}
		806
		807	REQ_SEND;
		808	}
		809
		810	void
		811	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		812	ALIAS:
		813	aio_chmod = EIO_CHMOD
		814	aio_mkdir = EIO_MKDIR
		815	PPCODE:
		816	{
		817	dREQ;
		818
		819	req->int2 = mode;
		820	req->sv1 = newSVsv (fh_or_path);
		821
		822	if (SvPOK (req->sv1))
		823	{
		824	req->type = ix;
		825	req->ptr1 = SvPVbyte_nolen (req->sv1);
		826	}
		827	else
		828	{
		829	req->type = EIO_FCHMOD;
		830	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		831	}
		832
		833	REQ_SEND;
		834	}
		835
		836	void
		837	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		838	PPCODE:
		839	{
		840	dREQ;
		841
		842	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		843	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		844	req->sv1 = newSVsv (fh_or_path);
		845
		846	if (SvPOK (req->sv1))
		847	{
		848	req->type = EIO_CHOWN;
		849	req->ptr1 = SvPVbyte_nolen (req->sv1);
		850	}
		851	else
		852	{
		853	req->type = EIO_FCHOWN;
		854	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		855	}
		856
		857	REQ_SEND;
		858	}
		859
		860	void
		861	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		862	ALIAS:
		863	aio_unlink = EIO_UNLINK
		864	aio_rmdir = EIO_RMDIR
		865	aio_readdir = EIO_READDIR
		866	PPCODE:
		867	{
		868	dREQ;
		869
		870	req->type = ix;
		871	req->sv1 = newSVsv (pathname);
		872	req->ptr1 = SvPVbyte_nolen (req->sv1);
		873
		874	REQ_SEND;
		875	}
		876
		877	void
		878	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		879	ALIAS:
		880	aio_link = EIO_LINK
		881	aio_symlink = EIO_SYMLINK
		882	aio_rename = EIO_RENAME
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->type = ix;
		888	req->sv1 = newSVsv (oldpath);
		889	req->ptr1 = SvPVbyte_nolen (req->sv1);
		890	req->sv2 = newSVsv (newpath);
		891	req->ptr2 = SvPVbyte_nolen (req->sv2);
		892
		893	REQ_SEND;
		894	}
		895
		896	void
		897	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		898	PPCODE:
		899	{
		900	dREQ;
		901
		902	req->type = EIO_MKNOD;
		903	req->sv1 = newSVsv (pathname);
		904	req->ptr1 = SvPVbyte_nolen (req->sv1);
		905	req->int2 = (mode_t)mode;
		906	req->offs = dev;
		907
		908	REQ_SEND;
		909	}
		910
		911	void
		912	aio_busy (double delay, SV *callback=&PL_sv_undef)
		913	PPCODE:
		914	{
		915	dREQ;
		916
		917	req->type = EIO_BUSY;
		918	req->nv1 = delay < 0. ? 0. : delay;
		919
		920	REQ_SEND;
		921	}
		922
		923	void
		924	aio_group (SV *callback=&PL_sv_undef)
		925	PROTOTYPE: ;$
		926	PPCODE:
		927	{
		928	dREQ;
		929
		930	req->type = EIO_GROUP;
		931
		932	req_submit (req);
		933	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		934	}
		935
		936	void
		937	aio_nop (SV *callback=&PL_sv_undef)
		938	ALIAS:
		939	aio_nop = EIO_NOP
		940	aio_sync = EIO_SYNC
		941	PPCODE:
		942	{
		943	dREQ;
		944
		945	req->type = ix;
		946
		947	REQ_SEND;
		948	}
		949
		950	int
		951	aioreq_pri (int pri = 0)
		952	PROTOTYPE: ;$
		953	CODE:
		954	RETVAL = next_pri;
		955	if (items > 0)
		956	{
		957	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		958	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		959	next_pri = pri;
		960	}
		961	OUTPUT:
		962	RETVAL
		963
		964	void
		965	aioreq_nice (int nice = 0)
		966	CODE:
		967	nice = next_pri - nice;
		968	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		969	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		970	next_pri = nice;
		971
		972	void
		973	flush ()
		974	PROTOTYPE:
		975	CODE:
		976	while (eio_nreqs ())
338	{	977	{
339	poll_wait ();	978	poll_wait ();
340	poll_cb (aTHX);	979	poll_cb ();
341	}
342	}
343
344	void
345	aio_open(pathname,flags,mode,callback)
346	SV * pathname
347	int flags
348	int mode
349	SV * callback
350	PROTOTYPE: $$$$
351	CODE:
352	{
353	aio_req req;
354
355	Newz (0, req, 1, aio_cb);
356
357	if (!req)
358	croak ("out of memory during aio_req allocation");
359
360	req->type = REQ_OPEN;
361	req->data = newSVsv (pathname);
362	req->dataptr = SvPV_nolen (req->data);
363	req->fd = flags;
364	req->mode = mode;
365	req->callback = SvREFCNT_inc (callback);
366
367	send_req (req);
368	}
369
370	void
371	aio_close(fh,callback)
372	InputStream fh
373	SV * callback
374	PROTOTYPE: $$
375	ALIAS:
376	aio_close = REQ_CLOSE
377	aio_fsync = REQ_FSYNC
378	aio_fdatasync = REQ_FDATASYNC
379	CODE:
380	{
381	aio_req req;
382
383	Newz (0, req, 1, aio_cb);
384
385	if (!req)
386	croak ("out of memory during aio_req allocation");
387
388	req->type = ix;
389	req->fd = PerlIO_fileno (fh);
390	req->callback = SvREFCNT_inc (callback);
391
392	send_req (req);
393	}
394
395	void
396	aio_read(fh,offset,length,data,dataoffset,callback)
397	InputStream fh
398	UV offset
399	IV length
400	SV * data
401	IV dataoffset
402	SV * callback
403	PROTOTYPE: $$$$$$
404	CODE:
405	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407	void
408	aio_write(fh,offset,length,data,dataoffset,callback)
409	OutputStream fh
410	UV offset
411	IV length
412	SV * data
413	IV dataoffset
414	SV * callback
415	PROTOTYPE: $$$$$$
416	CODE:
417	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
418
419	void
420	aio_readahead(fh,offset,length,callback)
421	InputStream fh
422	UV offset
423	IV length
424	SV * callback
425	PROTOTYPE: $$$$
426	CODE:
427	{
428	aio_req req;
429
430	if (length < 0)
431	croak ("length must not be negative");
432
433	Newz (0, req, 1, aio_cb);
434
435	if (!req)
436	croak ("out of memory during aio_req allocation");
437
438	req->type = REQ_READAHEAD;
439	req->fd = PerlIO_fileno (fh);
440	req->offset = offset;
441	req->length = length;
442	req->callback = SvREFCNT_inc (callback);
443
444	send_req (req);
445	}
446
447	void
448	aio_stat(fh_or_path,callback)
449	SV * fh_or_path
450	SV * callback
451	PROTOTYPE: $$
452	ALIAS:
453	aio_lstat = 1
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	New (0, req->statdata, 1, Stat_t);
464
465	if (!req->statdata)
466	croak ("out of memory during aio_req->statdata allocation");
467
468	if (SvPOK (fh_or_path))
469	{	980	}
470	req->type = ix ? REQ_LSTAT : REQ_STAT;
471	req->data = newSVsv (fh_or_path);
472	req->dataptr = SvPV_nolen (req->data);
473	}
474	else
475	{
476	req->type = REQ_FSTAT;
477	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
478	}
479		981
480	req->callback = SvREFCNT_inc (callback);	982	int
481		983	poll()
482	send_req (req);
483	}
484
485	void
486	aio_unlink(pathname,callback)
487	SV * pathname
488	SV * callback
489	PROTOTYPE: $$	984	PROTOTYPE:
490	CODE:	985	CODE:
491	{	986	poll_wait ();
492	aio_req req;	987	RETVAL = poll_cb ();
493		988	OUTPUT:
494	Newz (0, req, 1, aio_cb);	989	RETVAL
495
496	if (!req)
497	croak ("out of memory during aio_req allocation");
498
499	req->type = REQ_UNLINK;
500	req->data = newSVsv (pathname);
501	req->dataptr = SvPV_nolen (req->data);
502	req->callback = SvREFCNT_inc (callback);
503
504	send_req (req);
505	}
506		990
507	int	991	int
508	poll_fileno()	992	poll_fileno()
509	PROTOTYPE:	993	PROTOTYPE:
510	CODE:	994	CODE:
511	RETVAL = respipe[0];	995	RETVAL = respipe [0];
512	OUTPUT:	996	OUTPUT:
513	RETVAL	997	RETVAL
514		998
515	int	999	int
516	poll_cb(...)	1000	poll_cb(...)
517	PROTOTYPE:	1001	PROTOTYPE:
518	CODE:	1002	CODE:
519	RETVAL = poll_cb (aTHX);	1003	RETVAL = poll_cb ();
520	OUTPUT:	1004	OUTPUT:
521	RETVAL	1005	RETVAL
522		1006
523	void	1007	void
524	poll_wait()	1008	poll_wait()
…		…
528		1012
529	int	1013	int
530	nreqs()	1014	nreqs()
531	PROTOTYPE:	1015	PROTOTYPE:
532	CODE:	1016	CODE:
533	RETVAL = nreqs;	1017	RETVAL = eio_nreqs ();
534	OUTPUT:	1018	OUTPUT:
535	RETVAL	1019	RETVAL
536		1020
		1021	int
		1022	nready()
		1023	PROTOTYPE:
		1024	CODE:
		1025	RETVAL = eio_nready ();
		1026	OUTPUT:
		1027	RETVAL
		1028
		1029	int
		1030	npending()
		1031	PROTOTYPE:
		1032	CODE:
		1033	RETVAL = eio_npending ();
		1034	OUTPUT:
		1035	RETVAL
		1036
		1037	int
		1038	nthreads()
		1039	PROTOTYPE:
		1040	CODE:
		1041	RETVAL = eio_nthreads ();
		1042	OUTPUT:
		1043	RETVAL
		1044
		1045	void _on_next_submit (SV *cb)
		1046	CODE:
		1047	SvREFCNT_dec (on_next_submit);
		1048	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1049
		1050	PROTOTYPES: DISABLE
		1051
		1052	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1053
		1054	void
		1055	cancel (aio_req_ornot req)
		1056	CODE:
		1057	eio_cancel (req);
		1058
		1059	void
		1060	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1061	PPCODE:
		1062	{
		1063	if (GIMME_V != G_VOID)
		1064	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1065
		1066	if (items > 1)
		1067	{
		1068	SV *cb_cv = get_cb (callback);
		1069
		1070	SvREFCNT_dec (req->callback);
		1071	req->callback = SvREFCNT_inc (cb_cv);
		1072	}
		1073	}
		1074
		1075	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1076
		1077	void
		1078	add (aio_req grp, ...)
		1079	PPCODE:
		1080	{
		1081	int i;
		1082
		1083	if (grp->int1 == 2)
		1084	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1085
		1086	for (i = 1; i < items; ++i )
		1087	{
		1088	aio_req req;
		1089
		1090	if (GIMME_V != G_VOID)
		1091	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1092
		1093	req = SvAIO_REQ (ST (i));
		1094
		1095	if (req)
		1096	eio_grp_add (grp, req);
		1097	}
		1098	}
		1099
		1100	void
		1101	cancel_subs (aio_req_ornot req)
		1102	CODE:
		1103	req_cancel_subs (req);
		1104
		1105	void
		1106	result (aio_req grp, ...)
		1107	CODE:
		1108	{
		1109	int i;
		1110	AV *av;
		1111
		1112	grp->errorno = errno;
		1113
		1114	av = newAV ();
		1115
		1116	for (i = 1; i < items; ++i )
		1117	av_push (av, newSVsv (ST (i)));
		1118
		1119	SvREFCNT_dec (grp->sv1);
		1120	grp->sv1 = (SV *)av;
		1121	}
		1122
		1123	void
		1124	errno (aio_req grp, int errorno = errno)
		1125	CODE:
		1126	grp->errorno = errorno;
		1127
		1128	void
		1129	limit (aio_req grp, int limit)
		1130	CODE:
		1131	eio_grp_limit (grp, limit);
		1132
		1133	void
		1134	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1135	CODE:
		1136	{
		1137	SvREFCNT_dec (grp->sv2);
		1138	grp->sv2 = newSVsv (callback);
		1139
		1140	if (grp->int2 <= 0)
		1141	grp->int2 = 2;
		1142
		1143	eio_grp_limit (grp, grp->int2);
		1144	}
		1145

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