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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.63 by root, Mon Oct 23 23:48:31 2006 UTC vs.
Revision 1.146 by root, Fri Jun 12 17:07:00 2009 UTC

1	#if __linux	1	#include "libeio/xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"
14
15	#include <pthread.h>
16
17	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
18	#include <errno.h>	11	#include <errno.h>
19	#include <sys/time.h>
20	#include <sys/select.h>
21	#include <sys/types.h>	12	#include <sys/types.h>
22	#include <sys/stat.h>	13	#include <sys/stat.h>
23	#include <limits.h>	14	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	15	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	16	#include <sched.h>
28		17
29	#if HAVE_SENDFILE	18	/* perl namespace pollution */
30	# if __linux	19	#undef VERSION
31	# include <sys/sendfile.h>	20
32	# elif __freebsd	21	#ifdef _WIN32
33	# include <sys/socket.h>	22
34	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
35	# elif __hpux	24	# undef malloc
36	# include <sys/socket.h>	25	# undef free
37	# elif __solaris /* not yet */	26
38	# include <sys/sendfile.h>	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
39	# else	59	#else
40	# error sendfile support requested but not available	60
41	# endif	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
42	#endif	68	#endif
43		69
44	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
45	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
46	# define NAME_MAX 4096	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
47	#endif	83	#endif
48		84
49	#if __ia64	85	/*****************************************************************************/
50	# define STACKSIZE 65536	86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
51	#else	89	#else
52	# define STACKSIZE 8192	90	# define expect(expr,value) (expr)
53	#endif	91	#endif
54		92
55	enum {	93	#define expect_false(expr) expect ((expr) != 0, 0)
56	REQ_QUIT,	94	#define expect_true(expr) expect ((expr) != 0, 1)
57	REQ_OPEN, REQ_CLOSE,	95
58	REQ_READ, REQ_WRITE, REQ_READAHEAD,	96	/*****************************************************************************/
59	REQ_SENDFILE,	97
60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	98	static HV *stash;
61	REQ_FSYNC, REQ_FDATASYNC,	99	typedef SV SV8; /* byte-sv, used for argument-checking */
62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
63	REQ_READDIR,
64	REQ_LINK, REQ_SYMLINK,
65	REQ_GROUP, REQ_NOP,
66	REQ_SLEEP,
67	};
68		100
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		103
72	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
73	{
74	struct aio_cb *volatile next;
75
76	SV *data, *callback;	105	SV *callback; \
77	SV *fh, *fh2;	106	SV *sv1, *sv2; \
78	void *dataptr, *data2ptr;
79	Stat_t *statdata;
80	off_t offset;
81	size_t length;
82	ssize_t result;
83
84	STRLEN dataoffset;	107	STRLEN stroffset; \
85	int type;	108	SV *self;
86	int fd, fd2;
87	int errorno;
88	mode_t mode; /* open */
89		109
90	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
91	unsigned char pri;
92		111
93	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
94	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
95	} aio_cb;	114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
96		118
97	enum {	119	enum {
98	FLAG_CANCELLED = 0x01,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
99	};	121	};
100		122
		123	#include "libeio/eio.c"
		124
101	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
102	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
103		127
104	enum {	128	static SV *on_next_submit;
105	PRI_MIN = -4,	129	static int next_pri = EIO_PRI_DEFAULT;
106	PRI_MAX = 4,
107
108	DEFAULT_PRI = 0,
109	PRI_BIAS = -PRI_MIN,
110	};
111
112	static int next_pri = DEFAULT_PRI + PRI_BIAS;
113
114	static int started, wanted;
115	static volatile int nreqs;
116	static int max_outstanding = 1<<30;	130	static int max_outstanding;
117	static int respipe [2];
118		131
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
121	#else
122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
123	#endif
124		133
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	134	static void req_destroy (aio_req req);
126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
128
129	static volatile aio_req reqs, reqe; /* queue start, queue end */
130	static volatile aio_req ress, rese; /* queue start, queue end */
131
132	static void req_invoke (aio_req req);	135	static void req_cancel (aio_req req);
133	static void req_free (aio_req req);	136
		137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
134		150
135	/* must be called at most once */	151	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
137	{	153	{
138	if (!req->self)	154	if (!req->self)
…		…
156	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
157	}	173	}
158		174
159	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
160	{	176	{
161	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
162	{	178	{
163	int old_len = grp->length;	179	dSP;
164		180
165	if (grp->fh2 && SvOK (grp->fh2))	181	ENTER;
		182	SAVETMPS;
		183	PUSHMARK (SP);
		184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		185	PUTBACK;
		186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		187	SPAGAIN;
		188	FREETMPS;
		189	LEAVE;
		190	}
		191	}
		192
		193	static void req_submit (eio_req *req)
		194	{
		195	eio_submit (req);
		196
		197	if (expect_false (on_next_submit))
		198	{
		199	dSP;
		200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
		207	}
		208	}
		209
		210	static int req_invoke (eio_req *req)
		211	{
		212	dSP;
		213
		214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
		218	{
		219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
		223
		224	switch (req->type)
166	{	225	{
167	dSP;	226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
168		229
169	ENTER;	230	if (req->result >= 0)
170	SAVETMPS;	231	{
171	PUSHMARK (SP);	232	int i;
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	233	char *buf = req->ptr2;
173	PUTBACK;	234	AV *av = newAV ();
174	call_sv (grp->fh2, G_VOID | G_EVAL);	235
175	SPAGAIN;	236	av_extend (av, req->result - 1);
176	FREETMPS;	237
177	LEAVE;	238	for (i = 0; i < req->result; ++i)
		239	{
		240	if (req->int1 & EIO_READDIR_DENTS)
		241	{
		242	eio_dirent *ent = (eio_dirent *)buf;
		243	SV *namesv = newSVpvn (ent->name, ent->namelen);
		244
		245	if (req->int1 & EIO_READDIR_CUSTOM2)
		246	{
		247	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		248	AV *avent = newAV ();
		249
		250	av_extend (avent, 2);
		251
		252	if (!sv_type [ent->type])
		253	{
		254	sv_type [ent->type] = newSViv (ent->type);
		255	SvREADONLY_on (sv_type [ent->type]);
		256	}
		257
		258	av_store (avent, 0, namesv);
		259	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		260	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		261
		262	av_store (av, i, newRV_noinc ((SV *)avent));
		263	}
		264	else
		265	av_store (av, i, namesv);
		266
		267	buf += sizeof (eio_dirent);
		268	}
		269	else
		270	{
		271	SV *name = newSVpv (buf, 0);
		272	av_store (av, i, name);
		273	buf += SvCUR (name) + 1;
		274	}
		275	}
		276
		277	rv = sv_2mortal (newRV_noinc ((SV *)av));
		278	}
		279
		280	PUSHs (rv);
		281
		282	if (req->int1 & EIO_READDIR_CUSTOM1)
		283	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		284	}
		285	break;
		286
		287	case EIO_OPEN:
		288	{
		289	/* convert fd to fh */
		290	SV *fh = &PL_sv_undef;
		291
		292	if (req->result >= 0)
		293	{
		294	GV *gv = (GV *)sv_newmortal ();
		295	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		296	char sym [64];
		297	int symlen;
		298
		299	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		300	gv_init (gv, stash, sym, symlen, 0);
		301
		302	symlen = snprintf (
		303	sym,
		304	sizeof (sym),
		305	"%s&=%d",
		306	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		307	(int)req->result
		308	);
		309
		310	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		311	fh = (SV *)gv;
		312	}
		313
		314	PUSHs (fh);
		315	}
		316	break;
		317
		318	case EIO_GROUP:
		319	req->int1 = 2; /* mark group as finished */
		320
		321	if (req->sv1)
		322	{
		323	int i;
		324	AV *av = (AV *)req->sv1;
		325
		326	EXTEND (SP, AvFILL (av) + 1);
		327	for (i = 0; i <= AvFILL (av); ++i)
		328	PUSHs (*av_fetch (av, i, 0));
		329	}
		330	break;
		331
		332	case EIO_NOP:
		333	case EIO_BUSY:
		334	break;
		335
		336	case EIO_READLINK:
		337	if (req->result > 0)
		338	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		339	break;
		340
		341	case EIO_STAT:
		342	case EIO_LSTAT:
		343	case EIO_FSTAT:
		344	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		345	PL_laststatval = req->result;
		346	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		347	PUSHs (sv_2mortal (newSViv (req->result)));
		348	break;
		349
		350	case EIO_READ:
		351	{
		352	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		353	*SvEND (req->sv2) = 0;
		354	SvPOK_only (req->sv2);
		355	SvSETMAGIC (req->sv2);
		356	PUSHs (sv_2mortal (newSViv (req->result)));
		357	}
		358	break;
		359
		360	case EIO_DUP2:
		361	if (req->result > 0)
		362	req->result = 0;
		363	/* FALLTHROUGH */
		364
		365	default:
		366	PUSHs (sv_2mortal (newSViv (req->result)));
		367	break;
178	}	368	}
179		369
180	/* stop if no progress has been made */	370	errno = req->errorno;
181	if (old_len == grp->length)	371
182	{	372	PUTBACK;
183	SvREFCNT_dec (grp->fh2);	373	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
184	grp->fh2 = 0;	374	SPAGAIN;
185	break;	375
186	}	376	FREETMPS;
		377	LEAVE;
		378
		379	PUTBACK;
187	}	380	}
188	}
189		381
190	static void aio_grp_dec (aio_req grp)	382	return !!SvTRUE (ERRSV);
191	{
192	--grp->length;
193
194	/* call feeder, if applicable */
195	aio_grp_feed (grp);
196
197	/* finish, if done */
198	if (!grp->length && grp->fd)
199	{
200	req_invoke (grp);
201	req_free (grp);
202	}
203	}	383	}
204		384
205	static void poll_wait ()
206	{
207	fd_set rfd;
208
209	while (nreqs)
210	{
211	aio_req req;
212	pthread_mutex_lock (&reslock);
213	req = ress;
214	pthread_mutex_unlock (&reslock);
215
216	if (req)
217	return;
218
219	FD_ZERO(&rfd);
220	FD_SET(respipe [0], &rfd);
221
222	select (respipe [0] + 1, &rfd, 0, 0, 0);
223	}
224	}
225
226	static void req_invoke (aio_req req)
227	{
228	dSP;
229	int errorno = errno;
230
231	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
232	return;
233
234	errno = req->errorno;
235
236	ENTER;
237	SAVETMPS;
238	PUSHMARK (SP);
239	EXTEND (SP, 1);
240
241	switch (req->type)
242	{
243	case REQ_READDIR:
244	{
245	SV *rv = &PL_sv_undef;
246
247	if (req->result >= 0)
248	{
249	char *buf = req->data2ptr;
250	AV *av = newAV ();
251
252	while (req->result)
253	{
254	SV *sv = newSVpv (buf, 0);
255
256	av_push (av, sv);
257	buf += SvCUR (sv) + 1;
258	req->result--;
259	}
260
261	rv = sv_2mortal (newRV_noinc ((SV *)av));
262	}
263
264	PUSHs (rv);
265	}
266	break;
267
268	case REQ_OPEN:
269	{
270	/* convert fd to fh */
271	SV *fh;
272
273	PUSHs (sv_2mortal (newSViv (req->result)));
274	PUTBACK;
275	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
276	SPAGAIN;
277
278	fh = SvREFCNT_inc (POPs);
279
280	PUSHMARK (SP);
281	XPUSHs (sv_2mortal (fh));
282	}
283	break;
284
285	case REQ_GROUP:
286	req->fd = 2; /* mark group as finished */
287
288	if (req->data)
289	{
290	int i;
291	AV *av = (AV *)req->data;
292
293	EXTEND (SP, AvFILL (av) + 1);
294	for (i = 0; i <= AvFILL (av); ++i)
295	PUSHs (*av_fetch (av, i, 0));
296	}
297	break;
298
299	case REQ_NOP:
300	case REQ_SLEEP:
301	break;
302
303	default:
304	PUSHs (sv_2mortal (newSViv (req->result)));
305	break;
306	}
307
308
309	PUTBACK;
310	call_sv (req->callback, G_VOID | G_EVAL);
311	SPAGAIN;
312
313	FREETMPS;
314	LEAVE;
315
316	errno = errorno;
317
318	if (SvTRUE (ERRSV))
319	{
320	req_free (req);
321	croak (0);
322	}
323	}
324
325	static void req_free (aio_req req)	385	static void req_destroy (aio_req req)
326	{	386	{
327	if (req->grp)
328	{
329	aio_req grp = req->grp;
330
331	/* unlink request */
332	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
333	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
334
335	if (grp->grp_first == req)
336	grp->grp_first = req->grp_next;
337
338	aio_grp_dec (grp);
339	}
340
341	if (req->self)	387	if (req->self)
342	{	388	{
343	sv_unmagic (req->self, PERL_MAGIC_ext);	389	sv_unmagic (req->self, PERL_MAGIC_ext);
344	SvREFCNT_dec (req->self);	390	SvREFCNT_dec (req->self);
345	}	391	}
346		392
347	SvREFCNT_dec (req->data);
348	SvREFCNT_dec (req->fh);	393	SvREFCNT_dec (req->sv1);
349	SvREFCNT_dec (req->fh2);	394	SvREFCNT_dec (req->sv2);
350	SvREFCNT_dec (req->callback);	395	SvREFCNT_dec (req->callback);
351	Safefree (req->statdata);
352
353	if (req->type == REQ_READDIR && req->result >= 0)
354	free (req->data2ptr);
355		396
356	Safefree (req);	397	Safefree (req);
357	}	398	}
358		399
359	static void req_cancel (aio_req req)	400	static void req_cancel_subs (aio_req grp)
360	{	401	{
361	req->flags |= FLAG_CANCELLED;	402	aio_req sub;
362		403
363	if (req->type == REQ_GROUP)	404	if (grp->type != EIO_GROUP)
		405	return;
		406
		407	SvREFCNT_dec (grp->sv2);
		408	grp->sv2 = 0;
		409
		410	eio_grp_cancel (grp);
		411	}
		412
		413	#ifdef USE_SOCKETS_AS_HANDLES
		414	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		415	#else
		416	# define TO_SOCKET(x) (x)
		417	#endif
		418
		419	static void
		420	create_respipe (void)
		421	{
		422	int old_readfd = respipe [0];
		423
		424	if (respipe [1] >= 0)
		425	respipe_close (TO_SOCKET (respipe [1]));
		426
		427	#ifdef _WIN32
		428	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		429	#else
		430	if (pipe (respipe))
		431	#endif
		432	croak ("unable to initialize result pipe");
		433
		434	if (old_readfd >= 0)
364	{	435	{
365	aio_req sub;	436	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		437	croak ("unable to initialize result pipe(2)");
366		438
367	for (sub = req->grp_first; sub; sub = sub->grp_next)	439	respipe_close (respipe [0]);
368	req_cancel (sub);	440	respipe [0] = old_readfd;
369	}	441	}
370	}
371		442
		443	#ifdef _WIN32
		444	int arg = 1;
		445	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		446	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		447	#else
		448	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		449	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		450	#endif
		451	croak ("unable to initialize result pipe(3)");
		452
		453	respipe_osf [0] = TO_SOCKET (respipe [0]);
		454	respipe_osf [1] = TO_SOCKET (respipe [1]);
		455	}
		456
		457	static void poll_wait (void)
		458	{
		459	fd_set rfd;
		460
		461	while (eio_nreqs ())
		462	{
		463	int size;
		464
		465	X_LOCK (reslock);
		466	size = res_queue.size;
		467	X_UNLOCK (reslock);
		468
		469	if (size)
		470	return;
		471
		472	etp_maybe_start_thread ();
		473
		474	FD_ZERO (&rfd);
		475	FD_SET (respipe [0], &rfd);
		476
		477	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		478	}
		479	}
		480
372	static int poll_cb ()	481	static int poll_cb (void)
373	{	482	{
374	dSP;
375	int count = 0;
376	int do_croak = 0;
377	aio_req req;
378
379	for (;;)	483	for (;;)
380	{	484	{
381	pthread_mutex_lock (&reslock);	485	int res = eio_poll ();
382	req = ress;
383		486
384	if (req)	487	if (res > 0)
385	{
386	ress = req->next;
387
388	if (!ress)
389	{
390	/* read any signals sent by the worker threads */
391	char buf [32];
392	while (read (respipe [0], buf, 32) == 32)
393	;
394
395	rese = 0;
396	}
397	}
398
399	pthread_mutex_unlock (&reslock);
400
401	if (!req)
402	break;	488	croak (0);
403		489
404	--nreqs;	490	if (!max_outstanding || max_outstanding > eio_nreqs ())
		491	return res;
405		492
406	if (req->type == REQ_QUIT)	493	poll_wait ();
407	started--;
408	else if (req->type == REQ_GROUP && req->length)
409	{
410	req->fd = 1; /* mark request as delayed */
411	continue;
412	}
413	else
414	{
415	if (req->type == REQ_READ)
416	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
417
418	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
419	SvREADONLY_off (req->data);
420
421	if (req->statdata)
422	{
423	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
424	PL_laststatval = req->result;
425	PL_statcache = *(req->statdata);
426	}
427
428	req_invoke (req);
429
430	count++;
431	}
432
433	req_free (req);
434	}	494	}
435
436	return count;
437	}	495	}
438		496
439	static void *aio_proc(void *arg);
440
441	static void start_thread (void)	497	static void atfork_child (void)
442	{	498	{
443	sigset_t fullsigset, oldsigset;	499	create_respipe ();
444	pthread_t tid;
445	pthread_attr_t attr;
446
447	pthread_attr_init (&attr);
448	pthread_attr_setstacksize (&attr, STACKSIZE);
449	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
450
451	sigfillset (&fullsigset);
452	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
453
454	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
455	started++;
456
457	sigprocmask (SIG_SETMASK, &oldsigset, 0);
458	}	500	}
459		501
460	static void req_send (aio_req req)	502	static SV *
		503	get_cb (SV *cb_sv)
461	{	504	{
462	while (started < wanted && nreqs >= started)	505	HV *st;
463	start_thread ();	506	GV *gvp;
		507	CV *cv;
464		508
465	++nreqs;	509	if (!SvOK (cb_sv))
466
467	pthread_mutex_lock (&reqlock);
468
469	req->next = 0;
470
471	if (reqe)
472	{
473	reqe->next = req;
474	reqe = req;
475	}
476	else
477	reqe = reqs = req;
478
479	pthread_cond_signal (&reqwait);
480	pthread_mutex_unlock (&reqlock);
481
482	if (nreqs > max_outstanding)
483	for (;;)
484	{
485	poll_cb ();
486
487	if (nreqs <= max_outstanding)
488	break;
489
490	poll_wait ();
491	}
492	}
493
494	static void end_thread (void)
495	{
496	aio_req req;
497	Newz (0, req, 1, aio_cb);
498	req->type = REQ_QUIT;
499
500	req_send (req);
501	}
502
503	static void min_parallel (int nthreads)
504	{
505	if (wanted < nthreads)
506	wanted = nthreads;
507	}
508
509	static void max_parallel (int nthreads)
510	{
511	int cur = started;
512
513	if (wanted > nthreads)
514	wanted = nthreads;
515
516	while (cur > wanted)
517	{
518	end_thread ();
519	cur--;
520	}
521
522	while (started > wanted)
523	{
524	poll_wait ();
525	poll_cb ();
526	}
527	}
528
529	static void create_pipe ()
530	{
531	if (pipe (respipe))
532	croak ("unable to initialize result pipe");
533
534	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
535	croak ("cannot set result pipe to nonblocking mode");
536
537	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
538	croak ("cannot set result pipe to nonblocking mode");
539	}
540
541	/*****************************************************************************/
542	/* work around various missing functions */
543
544	#if !HAVE_PREADWRITE
545	# define pread aio_pread
546	# define pwrite aio_pwrite
547
548	/*
549	* make our pread/pwrite safe against themselves, but not against
550	* normal read/write by using a mutex. slows down execution a lot,
551	* but that's your problem, not mine.
552	*/
553	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
554
555	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
556	{
557	ssize_t res;
558	off_t ooffset;
559
560	pthread_mutex_lock (&preadwritelock);
561	ooffset = lseek (fd, 0, SEEK_CUR);
562	lseek (fd, offset, SEEK_SET);
563	res = read (fd, buf, count);
564	lseek (fd, ooffset, SEEK_SET);
565	pthread_mutex_unlock (&preadwritelock);
566
567	return res;
568	}
569
570	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
571	{
572	ssize_t res;
573	off_t ooffset;
574
575	pthread_mutex_lock (&preadwritelock);
576	ooffset = lseek (fd, 0, SEEK_CUR);
577	lseek (fd, offset, SEEK_SET);
578	res = write (fd, buf, count);
579	lseek (fd, offset, SEEK_SET);
580	pthread_mutex_unlock (&preadwritelock);
581
582	return res;
583	}
584	#endif
585
586	#if !HAVE_FDATASYNC
587	# define fdatasync fsync
588	#endif
589
590	#if !HAVE_READAHEAD
591	# define readahead aio_readahead
592
593	static ssize_t readahead (int fd, off_t offset, size_t count)
594	{
595	char readahead_buf[4096];
596
597	while (count > 0)
598	{
599	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
600
601	pread (fd, readahead_buf, len, offset);
602	offset += len;
603	count -= len;
604	}
605
606	errno = 0;
607	}
608	#endif
609
610	#if !HAVE_READDIR_R
611	# define readdir_r aio_readdir_r
612
613	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
614
615	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
616	{
617	struct dirent *e;
618	int errorno;
619
620	pthread_mutex_lock (&readdirlock);
621
622	e = readdir (dirp);
623	errorno = errno;
624
625	if (e)
626	{
627	*res = ent;
628	strcpy (ent->d_name, e->d_name);
629	}
630	else
631	*res = 0;
632
633	pthread_mutex_unlock (&readdirlock);
634
635	errno = errorno;
636	return e ? 0 : -1;
637	}
638	#endif
639
640	/* sendfile always needs emulation */
641	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
642	{
643	ssize_t res;
644
645	if (!count)
646	return 0;	510	return 0;
647		511
648	#if HAVE_SENDFILE	512	cv = sv_2cv (cb_sv, &st, &gvp, 0);
649	# if __linux
650	res = sendfile (ofd, ifd, &offset, count);
651		513
652	# elif __freebsd	514	if (!cv)
653	/*	515	croak ("IO::AIO callback must be undef or a CODE reference");
654	* Of course, the freebsd sendfile is a dire hack with no thoughts
655	* wasted on making it similar to other I/O functions.
656	*/
657	{
658	off_t sbytes;
659	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
660		516
661	if (res < 0 && sbytes)	517	return (SV *)cv;
662	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
663	res = sbytes;
664	}
665
666	# elif __hpux
667	res = sendfile (ofd, ifd, offset, count, 0, 0);
668
669	# elif __solaris
670	{
671	struct sendfilevec vec;
672	size_t sbytes;
673
674	vec.sfv_fd = ifd;
675	vec.sfv_flag = 0;
676	vec.sfv_off = offset;
677	vec.sfv_len = count;
678
679	res = sendfilev (ofd, &vec, 1, &sbytes);
680
681	if (res < 0 && sbytes)
682	res = sbytes;
683	}
684
685	# endif
686	#else
687	res = -1;
688	errno = ENOSYS;
689	#endif
690
691	if (res < 0
692	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
693	#if __solaris
694	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
695	#endif
696	)
697	)
698	{
699	/* emulate sendfile. this is a major pain in the ass */
700	char buf[4096];
701	res = 0;
702
703	while (count)
704	{
705	ssize_t cnt;
706
707	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
708
709	if (cnt <= 0)
710	{
711	if (cnt && !res) res = -1;
712	break;
713	}
714
715	cnt = write (ofd, buf, cnt);
716
717	if (cnt <= 0)
718	{
719	if (cnt && !res) res = -1;
720	break;
721	}
722
723	offset += cnt;
724	res += cnt;
725	count -= cnt;
726	}
727	}
728
729	return res;
730	}
731
732	/* read a full directory */
733	static int scandir_ (const char *path, void **namesp)
734	{
735	DIR *dirp = opendir (path);
736	union
737	{
738	struct dirent d;
739	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
740	} u;
741	struct dirent *entp;
742	char *name, *names;
743	int memlen = 4096;
744	int memofs = 0;
745	int res = 0;
746	int errorno;
747
748	if (!dirp)
749	return -1;
750
751	names = malloc (memlen);
752
753	for (;;)
754	{
755	errno = 0, readdir_r (dirp, &u.d, &entp);
756
757	if (!entp)
758	break;
759
760	name = entp->d_name;
761
762	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
763	{
764	int len = strlen (name) + 1;
765
766	res++;
767
768	while (memofs + len > memlen)
769	{
770	memlen *= 2;
771	names = realloc (names, memlen);
772	if (!names)
773	break;
774	}
775
776	memcpy (names + memofs, name, len);
777	memofs += len;
778	}
779	}
780
781	errorno = errno;
782	closedir (dirp);
783
784	if (errorno)
785	{
786	free (names);
787	errno = errorno;
788	res = -1;
789	}
790
791	*namesp = (void *)names;
792	return res;
793	}
794
795	/*****************************************************************************/
796
797	static void *aio_proc (void *thr_arg)
798	{
799	aio_req req;
800	int type;
801
802	do
803	{
804	pthread_mutex_lock (&reqlock);
805
806	for (;;)
807	{
808	req = reqs;
809
810	if (reqs)
811	{
812	reqs = reqs->next;
813	if (!reqs) reqe = 0;
814	}
815
816	if (req)
817	break;
818
819	pthread_cond_wait (&reqwait, &reqlock);
820	}
821
822	pthread_mutex_unlock (&reqlock);
823
824	errno = 0; /* strictly unnecessary */
825	type = req->type; /* remember type for QUIT check */
826
827	if (!(req->flags & FLAG_CANCELLED))
828	switch (type)
829	{
830	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
831	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
832
833	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
834	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
835
836	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
837	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
838	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
839
840	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
841	case REQ_CLOSE: req->result = close (req->fd); break;
842	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
843	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
844	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
845	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
846	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
847
848	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
849	case REQ_FSYNC: req->result = fsync (req->fd); break;
850	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
851
852	case REQ_SLEEP:
853	{
854	struct timeval tv;
855
856	tv.tv_sec = req->fd;
857	tv.tv_usec = req->fd2;
858
859	req->result = select (0, 0, 0, 0, &tv);
860	}
861
862	case REQ_GROUP:
863	case REQ_NOP:
864	case REQ_QUIT:
865	break;
866
867	default:
868	req->result = ENOSYS;
869	break;
870	}
871
872	req->errorno = errno;
873
874	pthread_mutex_lock (&reslock);
875
876	req->next = 0;
877
878	if (rese)
879	{
880	rese->next = req;
881	rese = req;
882	}
883	else
884	{
885	rese = ress = req;
886
887	/* write a dummy byte to the pipe so fh becomes ready */
888	write (respipe [1], &respipe, 1);
889	}
890
891	pthread_mutex_unlock (&reslock);
892	}
893	while (type != REQ_QUIT);
894
895	return 0;
896	}
897
898	/*****************************************************************************/
899
900	static void atfork_prepare (void)
901	{
902	pthread_mutex_lock (&reqlock);
903	pthread_mutex_lock (&reslock);
904	#if !HAVE_PREADWRITE
905	pthread_mutex_lock (&preadwritelock);
906	#endif
907	#if !HAVE_READDIR_R
908	pthread_mutex_lock (&readdirlock);
909	#endif
910	}
911
912	static void atfork_parent (void)
913	{
914	#if !HAVE_READDIR_R
915	pthread_mutex_unlock (&readdirlock);
916	#endif
917	#if !HAVE_PREADWRITE
918	pthread_mutex_unlock (&preadwritelock);
919	#endif
920	pthread_mutex_unlock (&reslock);
921	pthread_mutex_unlock (&reqlock);
922	}
923
924	static void atfork_child (void)
925	{
926	aio_req prv;
927
928	started = 0;
929
930	while (reqs)
931	{
932	prv = reqs;
933	reqs = prv->next;
934	req_free (prv);
935	}
936
937	reqs = reqe = 0;
938
939	while (ress)
940	{
941	prv = ress;
942	ress = prv->next;
943	req_free (prv);
944	}
945
946	ress = rese = 0;
947
948	close (respipe [0]);
949	close (respipe [1]);
950	create_pipe ();
951
952	atfork_parent ();
953	}	518	}
954		519
955	#define dREQ \	520	#define dREQ \
		521	SV *cb_cv; \
956	aio_req req; \	522	aio_req req; \
957	int req_pri = next_pri; \	523	int req_pri = next_pri; \
958	next_pri = DEFAULT_PRI + PRI_BIAS; \	524	next_pri = EIO_PRI_DEFAULT; \
959	\	525	\
960	if (SvOK (callback) && !SvROK (callback)) \	526	cb_cv = get_cb (callback); \
961	croak ("callback must be undef or of reference type"); \
962	\	527	\
963	Newz (0, req, 1, aio_cb); \	528	Newz (0, req, 1, eio_req); \
964	if (!req) \	529	if (!req) \
965	croak ("out of memory during aio_req allocation"); \	530	croak ("out of memory during eio_req allocation"); \
966	\	531	\
967	req->callback = newSVsv (callback); \	532	req->callback = SvREFCNT_inc (cb_cv); \
968	req->pri = req_pri	533	req->pri = req_pri
969		534
970	#define REQ_SEND \	535	#define REQ_SEND \
		536	PUTBACK; \
971	req_send (req); \	537	req_submit (req); \
		538	SPAGAIN; \
972	\	539	\
973	if (GIMME_V != G_VOID) \	540	if (GIMME_V != G_VOID) \
974	XPUSHs (req_sv (req, AIO_REQ_KLASS));	541	XPUSHs (req_sv (req, AIO_REQ_KLASS));
975		542
		543	static int
		544	extract_fd (SV *fh, int wr)
		545	{
		546	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		547
		548	if (fd < 0)
		549	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		550
		551	return fd;
		552	}
		553
976	MODULE = IO::AIO PACKAGE = IO::AIO	554	MODULE = IO::AIO PACKAGE = IO::AIO
977		555
978	PROTOTYPES: ENABLE	556	PROTOTYPES: ENABLE
979		557
980	BOOT:	558	BOOT:
981	{	559	{
		560	static const struct {
		561	const char *name;
		562	IV iv;
		563	} *civ, const_iv[] = {
		564	# define const_iv(name, value) { # name, (IV) value },
		565	# define const_eio(name) { # name, (IV) EIO_ ## name },
		566	const_iv (EXDEV , EXDEV)
		567	const_iv (ENOSYS , ENOSYS)
		568	const_iv (O_RDONLY, O_RDONLY)
		569	const_iv (O_WRONLY, O_WRONLY)
		570	const_iv (O_CREAT , O_CREAT)
		571	const_iv (O_TRUNC , O_TRUNC)
		572	#ifndef _WIN32
		573	const_iv (S_IFIFO , S_IFIFO)
		574	#endif
		575	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		576	const_eio (SYNC_FILE_RANGE_WRITE)
		577	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		578
		579	const_eio (READDIR_DENTS)
		580	const_eio (READDIR_DIRS_FIRST)
		581	const_eio (READDIR_STAT_ORDER)
		582	const_eio (READDIR_FOUND_UNKNOWN)
		583
		584	const_eio (DT_UNKNOWN)
		585	const_eio (DT_FIFO)
		586	const_eio (DT_CHR)
		587	const_eio (DT_DIR)
		588	const_eio (DT_BLK)
		589	const_eio (DT_REG)
		590	const_eio (DT_LNK)
		591	const_eio (DT_SOCK)
		592	const_eio (DT_WHT)
		593	};
		594
982	HV *stash = gv_stashpv ("IO::AIO", 1);	595	stash = gv_stashpv ("IO::AIO", 1);
983	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
984	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
985	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
986		596
		597	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		598	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
		599
987	create_pipe ();	600	create_respipe ();
988	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
989	}
990		601
		602	if (eio_init (want_poll, done_poll) < 0)
		603	croak ("IO::AIO: unable to initialise eio library");
		604
		605	/* atfork child called in fifo order, so before eio's handler */
		606	X_THREAD_ATFORK (0, 0, atfork_child);
		607	}
		608
991	void	609	void
992	min_parallel (nthreads)	610	max_poll_reqs (int nreqs)
993	int nthreads
994	PROTOTYPE: $	611	PROTOTYPE: $
		612	CODE:
		613	eio_set_max_poll_reqs (nreqs);
995		614
996	void	615	void
997	max_parallel (nthreads)	616	max_poll_time (double nseconds)
998	int nthreads
999	PROTOTYPE: $	617	PROTOTYPE: $
1000
1001	int
1002	max_outstanding (nreqs)
1003	int nreqs
1004	PROTOTYPE: $
1005	CODE:	618	CODE:
1006	RETVAL = max_outstanding;	619	eio_set_max_poll_time (nseconds);
		620
		621	void
		622	min_parallel (int nthreads)
		623	PROTOTYPE: $
		624	CODE:
		625	eio_set_min_parallel (nthreads);
		626
		627	void
		628	max_parallel (int nthreads)
		629	PROTOTYPE: $
		630	CODE:
		631	eio_set_max_parallel (nthreads);
		632
		633	void
		634	max_idle (int nthreads)
		635	PROTOTYPE: $
		636	CODE:
		637	eio_set_max_idle (nthreads);
		638
		639	void
		640	max_outstanding (int maxreqs)
		641	PROTOTYPE: $
		642	CODE:
1007	max_outstanding = nreqs;	643	max_outstanding = maxreqs;
1008		644
1009	void	645	void
1010	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	646	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1011	SV * pathname
1012	int flags
1013	int mode
1014	SV * callback
1015	PROTOTYPE: $$$;$	647	PROTOTYPE: $$$;$
1016	PPCODE:	648	PPCODE:
1017	{	649	{
1018	dREQ;	650	dREQ;
1019		651
1020	req->type = REQ_OPEN;	652	req->type = EIO_OPEN;
1021	req->data = newSVsv (pathname);	653	req->sv1 = newSVsv (pathname);
1022	req->dataptr = SvPVbyte_nolen (req->data);	654	req->ptr1 = SvPVbyte_nolen (req->sv1);
1023	req->fd = flags;	655	req->int1 = flags;
1024	req->mode = mode;	656	req->int2 = mode;
1025		657
1026	REQ_SEND;	658	REQ_SEND;
1027	}	659	}
1028		660
1029	void	661	void
1030	aio_close (fh,callback=&PL_sv_undef)	662	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1031	SV * fh
1032	SV * callback
1033	PROTOTYPE: $;$	663	PROTOTYPE: $;$
1034	ALIAS:	664	ALIAS:
1035	aio_close = REQ_CLOSE
1036	aio_fsync = REQ_FSYNC	665	aio_fsync = EIO_FSYNC
1037	aio_fdatasync = REQ_FDATASYNC	666	aio_fdatasync = EIO_FDATASYNC
1038	PPCODE:	667	PPCODE:
1039	{	668	{
		669	int fd = extract_fd (fh, 0);
1040	dREQ;	670	dREQ;
1041		671
1042	req->type = ix;	672	req->type = ix;
1043	req->fh = newSVsv (fh);	673	req->sv1 = newSVsv (fh);
1044	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	674	req->int1 = fd;
1045		675
1046	REQ_SEND (req);	676	REQ_SEND (req);
1047	}	677	}
1048		678
1049	void	679	void
		680	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		681	PROTOTYPE: $$$$;$
		682	PPCODE:
		683	{
		684	int fd = extract_fd (fh, 0);
		685	dREQ;
		686
		687	req->type = EIO_SYNC_FILE_RANGE;
		688	req->sv1 = newSVsv (fh);
		689	req->int1 = fd;
		690	req->offs = SvVAL64 (offset);
		691	req->size = SvVAL64 (nbytes);
		692	req->int2 = flags;
		693
		694	REQ_SEND (req);
		695	}
		696
		697	void
		698	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		699	PROTOTYPE: $;$
		700	PPCODE:
		701	{
		702	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		703	int fd = extract_fd (fh, 0);
		704	dREQ;
		705
		706	if (close_pipe < 0)
		707	{
		708	int pipefd [2];
		709
		710	if (pipe (pipefd) < 0
		711	|| close (pipefd [1]) < 0
		712	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		713	abort (); /*D*/
		714
		715	close_pipe = pipefd [0];
		716	}
		717
		718	req->type = EIO_DUP2;
		719	req->int1 = close_pipe;
		720	req->sv2 = newSVsv (fh);
		721	req->int2 = fd;
		722
		723	REQ_SEND (req);
		724	}
		725
		726	void
1050	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	727	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1051	SV * fh
1052	UV offset
1053	UV length
1054	SV * data
1055	UV dataoffset
1056	SV * callback
1057	ALIAS:	728	ALIAS:
1058	aio_read = REQ_READ	729	aio_read = EIO_READ
1059	aio_write = REQ_WRITE	730	aio_write = EIO_WRITE
1060	PROTOTYPE: $$$$$;$	731	PROTOTYPE: $$$$$;$
1061	PPCODE:	732	PPCODE:
1062	{	733	{
1063	aio_req req;
1064	STRLEN svlen;	734	STRLEN svlen;
		735	int fd = extract_fd (fh, ix == EIO_WRITE);
1065	char *svptr = SvPVbyte (data, svlen);	736	char *svptr = SvPVbyte (data, svlen);
1066		737	UV len = SvUV (length);
1067	SvUPGRADE (data, SVt_PV);
1068	SvPOK_on (data);
1069		738
1070	if (dataoffset < 0)	739	if (dataoffset < 0)
1071	dataoffset += svlen;	740	dataoffset += svlen;
1072		741
1073	if (dataoffset < 0 || dataoffset > svlen)	742	if (dataoffset < 0 || dataoffset > svlen)
1074	croak ("data offset outside of string");	743	croak ("dataoffset outside of data scalar");
1075		744
1076	if (ix == REQ_WRITE)	745	if (ix == EIO_WRITE)
1077	{	746	{
1078	/* write: check length and adjust. */	747	/* write: check length and adjust. */
1079	if (length < 0 || length + dataoffset > svlen)	748	if (!SvOK (length) || len + dataoffset > svlen)
1080	length = svlen - dataoffset;	749	len = svlen - dataoffset;
1081	}	750	}
1082	else	751	else
1083	{	752	{
1084	/* read: grow scalar as necessary */	753	/* read: check type and grow scalar as necessary */
		754	SvUPGRADE (data, SVt_PV);
1085	svptr = SvGROW (data, length + dataoffset);	755	svptr = SvGROW (data, len + dataoffset + 1);
1086	}	756	}
1087
1088	if (length < 0)
1089	croak ("length must not be negative");
1090		757
1091	{	758	{
1092	dREQ;	759	dREQ;
1093		760
1094	req->type = ix;	761	req->type = ix;
1095	req->fh = newSVsv (fh);	762	req->sv1 = newSVsv (fh);
1096	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	763	req->int1 = fd;
1097	: IoOFP (sv_2io (fh)));	764	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1098	req->offset = offset;	765	req->size = len;
1099	req->length = length;
1100	req->data = SvREFCNT_inc (data);	766	req->sv2 = SvREFCNT_inc (data);
1101	req->dataptr = (char *)svptr + dataoffset;	767	req->ptr2 = (char *)svptr + dataoffset;
		768	req->stroffset = dataoffset;
1102		769
1103	if (!SvREADONLY (data))	770	if (!SvREADONLY (data))
1104	{	771	{
1105	SvREADONLY_on (data);	772	SvREADONLY_on (data);
1106	req->data2ptr = (void *)data;	773	req->flags |= FLAG_SV2_RO_OFF;
1107	}	774	}
1108		775
1109	REQ_SEND;	776	REQ_SEND;
1110	}	777	}
1111	}	778	}
1112		779
1113	void	780	void
		781	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		782	PROTOTYPE: $$;$
		783	PPCODE:
		784	{
		785	SV *data;
		786	dREQ;
		787
		788	req->type = EIO_READLINK;
		789	req->sv1 = newSVsv (path);
		790	req->ptr1 = SvPVbyte_nolen (req->sv1);
		791
		792	REQ_SEND;
		793	}
		794
		795	void
1114	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	796	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1115	SV * out_fh
1116	SV * in_fh
1117	UV in_offset
1118	UV length
1119	SV * callback
1120	PROTOTYPE: $$$$;$	797	PROTOTYPE: $$$$;$
1121	PPCODE:	798	PPCODE:
1122	{	799	{
		800	int ifd = extract_fd (in_fh , 0);
		801	int ofd = extract_fd (out_fh, 0);
1123	dREQ;	802	dREQ;
1124		803
1125	req->type = REQ_SENDFILE;	804	req->type = EIO_SENDFILE;
1126	req->fh = newSVsv (out_fh);	805	req->sv1 = newSVsv (out_fh);
1127	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	806	req->int1 = ofd;
1128	req->fh2 = newSVsv (in_fh);	807	req->sv2 = newSVsv (in_fh);
1129	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	808	req->int2 = ifd;
1130	req->offset = in_offset;	809	req->offs = SvVAL64 (in_offset);
1131	req->length = length;	810	req->size = length;
1132		811
1133	REQ_SEND;	812	REQ_SEND;
1134	}	813	}
1135		814
1136	void	815	void
1137	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	816	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	UV offset
1140	IV length
1141	SV * callback
1142	PROTOTYPE: $$$;$	817	PROTOTYPE: $$$;$
1143	PPCODE:	818	PPCODE:
1144	{	819	{
		820	int fd = extract_fd (fh, 0);
1145	dREQ;	821	dREQ;
1146		822
1147	req->type = REQ_READAHEAD;	823	req->type = EIO_READAHEAD;
1148	req->fh = newSVsv (fh);	824	req->sv1 = newSVsv (fh);
1149	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	825	req->int1 = fd;
1150	req->offset = offset;	826	req->offs = SvVAL64 (offset);
1151	req->length = length;	827	req->size = length;
1152		828
1153	REQ_SEND;	829	REQ_SEND;
1154	}	830	}
1155		831
1156	void	832	void
1157	aio_stat (fh_or_path,callback=&PL_sv_undef)	833	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1158	SV * fh_or_path
1159	SV * callback
1160	ALIAS:	834	ALIAS:
1161	aio_stat = REQ_STAT	835	aio_stat = EIO_STAT
1162	aio_lstat = REQ_LSTAT	836	aio_lstat = EIO_LSTAT
1163	PPCODE:	837	PPCODE:
1164	{	838	{
1165	dREQ;	839	dREQ;
1166		840
1167	New (0, req->statdata, 1, Stat_t);	841	req->sv1 = newSVsv (fh_or_path);
1168	if (!req->statdata)
1169	{
1170	req_free (req);
1171	croak ("out of memory during aio_req->statdata allocation");
1172	}
1173		842
1174	if (SvPOK (fh_or_path))	843	if (SvPOK (req->sv1))
1175	{	844	{
1176	req->type = ix;	845	req->type = ix;
1177	req->data = newSVsv (fh_or_path);
1178	req->dataptr = SvPVbyte_nolen (req->data);	846	req->ptr1 = SvPVbyte_nolen (req->sv1);
1179	}	847	}
1180	else	848	else
1181	{	849	{
1182	req->type = REQ_FSTAT;	850	req->type = EIO_FSTAT;
1183	req->fh = newSVsv (fh_or_path);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	851	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1185	}	852	}
1186		853
1187	REQ_SEND;	854	REQ_SEND;
1188	}	855	}
1189		856
1190	void	857	void
		858	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		859	PPCODE:
		860	{
		861	dREQ;
		862
		863	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		864	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		865	req->sv1 = newSVsv (fh_or_path);
		866
		867	if (SvPOK (req->sv1))
		868	{
		869	req->type = EIO_UTIME;
		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871	}
		872	else
		873	{
		874	req->type = EIO_FUTIME;
		875	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		876	}
		877
		878	REQ_SEND;
		879	}
		880
		881	void
		882	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->sv1 = newSVsv (fh_or_path);
		888	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		889
		890	if (SvPOK (req->sv1))
		891	{
		892	req->type = EIO_TRUNCATE;
		893	req->ptr1 = SvPVbyte_nolen (req->sv1);
		894	}
		895	else
		896	{
		897	req->type = EIO_FTRUNCATE;
		898	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		899	}
		900
		901	REQ_SEND;
		902	}
		903
		904	void
		905	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		906	ALIAS:
		907	aio_chmod = EIO_CHMOD
		908	aio_mkdir = EIO_MKDIR
		909	PPCODE:
		910	{
		911	dREQ;
		912
		913	req->int2 = mode;
		914	req->sv1 = newSVsv (fh_or_path);
		915
		916	if (SvPOK (req->sv1))
		917	{
		918	req->type = ix;
		919	req->ptr1 = SvPVbyte_nolen (req->sv1);
		920	}
		921	else
		922	{
		923	req->type = EIO_FCHMOD;
		924	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		925	}
		926
		927	REQ_SEND;
		928	}
		929
		930	void
		931	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		932	PPCODE:
		933	{
		934	dREQ;
		935
		936	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		937	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		938	req->sv1 = newSVsv (fh_or_path);
		939
		940	if (SvPOK (req->sv1))
		941	{
		942	req->type = EIO_CHOWN;
		943	req->ptr1 = SvPVbyte_nolen (req->sv1);
		944	}
		945	else
		946	{
		947	req->type = EIO_FCHOWN;
		948	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		949	}
		950
		951	REQ_SEND;
		952	}
		953
		954	void
		955	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		956	PPCODE:
		957	{
		958	dREQ;
		959
		960	req->type = EIO_READDIR;
		961	req->sv1 = newSVsv (pathname);
		962	req->ptr1 = SvPVbyte_nolen (req->sv1);
		963	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		964
		965	if (flags & EIO_READDIR_DENTS)
		966	req->int1 |= EIO_READDIR_CUSTOM2;
		967
		968	REQ_SEND;
		969	}
		970
		971	void
1191	aio_unlink (pathname,callback=&PL_sv_undef)	972	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1192	SV * pathname
1193	SV * callback
1194	ALIAS:	973	ALIAS:
1195	aio_unlink = REQ_UNLINK	974	aio_unlink = EIO_UNLINK
1196	aio_rmdir = REQ_RMDIR	975	aio_rmdir = EIO_RMDIR
1197	aio_readdir = REQ_READDIR	976	aio_readdir = EIO_READDIR
1198	PPCODE:	977	PPCODE:
1199	{	978	{
1200	dREQ;	979	dREQ;
1201		980
1202	req->type = ix;	981	req->type = ix;
1203	req->data = newSVsv (pathname);	982	req->sv1 = newSVsv (pathname);
1204	req->dataptr = SvPVbyte_nolen (req->data);	983	req->ptr1 = SvPVbyte_nolen (req->sv1);
		984
		985	REQ_SEND;
		986	}
		987
		988	void
		989	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		990	ALIAS:
		991	aio_link = EIO_LINK
		992	aio_symlink = EIO_SYMLINK
		993	aio_rename = EIO_RENAME
		994	PPCODE:
		995	{
		996	dREQ;
		997
		998	req->type = ix;
		999	req->sv1 = newSVsv (oldpath);
		1000	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1001	req->sv2 = newSVsv (newpath);
		1002	req->ptr2 = SvPVbyte_nolen (req->sv2);
1205		1003
1206	REQ_SEND;	1004	REQ_SEND;
1207	}	1005	}
1208		1006
1209	void	1007	void
1210	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1008	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1211	SV * oldpath
1212	SV * newpath
1213	SV * callback
1214	ALIAS:
1215	aio_link = REQ_LINK
1216	aio_symlink = REQ_SYMLINK
1217	aio_rename = REQ_RENAME
1218	PPCODE:	1009	PPCODE:
1219	{	1010	{
1220	dREQ;	1011	dREQ;
1221		1012
1222	req->type = ix;	1013	req->type = EIO_MKNOD;
1223	req->fh = newSVsv (oldpath);	1014	req->sv1 = newSVsv (pathname);
1224	req->data2ptr = SvPVbyte_nolen (req->fh);	1015	req->ptr1 = SvPVbyte_nolen (req->sv1);
1225	req->data = newSVsv (newpath);	1016	req->int2 = (mode_t)mode;
1226	req->dataptr = SvPVbyte_nolen (req->data);	1017	req->offs = dev;
1227		1018
1228	REQ_SEND;	1019	REQ_SEND;
1229	}	1020	}
1230		1021
1231	void	1022	void
1232	aio_sleep (delay,callback=&PL_sv_undef)	1023	aio_busy (double delay, SV *callback=&PL_sv_undef)
1233	double delay
1234	SV * callback
1235	PPCODE:	1024	PPCODE:
1236	{	1025	{
1237	dREQ;	1026	dREQ;
1238		1027
1239	req->type = REQ_SLEEP;	1028	req->type = EIO_BUSY;
1240	req->fd = delay < 0. ? 0 : delay;	1029	req->nv1 = delay < 0. ? 0. : delay;
1241	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1242		1030
1243	REQ_SEND;	1031	REQ_SEND;
1244	}	1032	}
1245		1033
1246	void	1034	void
1247	aio_group (callback=&PL_sv_undef)	1035	aio_group (SV *callback=&PL_sv_undef)
1248	SV * callback
1249	PROTOTYPE: ;$	1036	PROTOTYPE: ;$
1250	PPCODE:	1037	PPCODE:
1251	{	1038	{
1252	dREQ;	1039	dREQ;
1253		1040
1254	req->type = REQ_GROUP;	1041	req->type = EIO_GROUP;
		1042
1255	req_send (req);	1043	req_submit (req);
1256
1257	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1044	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1258	}	1045	}
1259		1046
1260	void	1047	void
1261	aio_nop (callback=&PL_sv_undef)	1048	aio_nop (SV *callback=&PL_sv_undef)
1262	SV * callback	1049	ALIAS:
		1050	aio_nop = EIO_NOP
		1051	aio_sync = EIO_SYNC
1263	PPCODE:	1052	PPCODE:
1264	{	1053	{
1265	dREQ;	1054	dREQ;
1266		1055
1267	req->type = REQ_NOP;	1056	req->type = ix;
1268		1057
1269	REQ_SEND;	1058	REQ_SEND;
1270	}	1059	}
1271		1060
1272	#if 0	1061	int
1273		1062	aioreq_pri (int pri = 0)
1274	void	1063	PROTOTYPE: ;$
1275	aio_pri (int pri = DEFAULT_PRI)
1276	CODE:	1064	CODE:
		1065	RETVAL = next_pri;
		1066	if (items > 0)
		1067	{
1277	if (pri < PRI_MIN) pri = PRI_MIN;	1068	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1278	if (pri > PRI_MAX) pri = PRI_MAX;	1069	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1279	next_pri = pri + PRI_BIAS;	1070	next_pri = pri;
		1071	}
		1072	OUTPUT:
		1073	RETVAL
1280		1074
1281	#endif	1075	void
		1076	aioreq_nice (int nice = 0)
		1077	CODE:
		1078	nice = next_pri - nice;
		1079	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1080	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1081	next_pri = nice;
1282		1082
1283	void	1083	void
1284	flush ()	1084	flush ()
1285	PROTOTYPE:	1085	PROTOTYPE:
1286	CODE:	1086	CODE:
1287	while (nreqs)	1087	while (eio_nreqs ())
1288	{	1088	{
1289	poll_wait ();	1089	poll_wait ();
1290	poll_cb ();	1090	poll_cb ();
1291	}	1091	}
1292		1092
1293	void	1093	int
1294	poll()	1094	poll()
1295	PROTOTYPE:	1095	PROTOTYPE:
1296	CODE:	1096	CODE:
1297	if (nreqs)
1298	{
1299	poll_wait ();	1097	poll_wait ();
1300	poll_cb ();	1098	RETVAL = poll_cb ();
1301	}	1099	OUTPUT:
		1100	RETVAL
1302		1101
1303	int	1102	int
1304	poll_fileno()	1103	poll_fileno()
1305	PROTOTYPE:	1104	PROTOTYPE:
1306	CODE:	1105	CODE:
…		…
1318		1117
1319	void	1118	void
1320	poll_wait()	1119	poll_wait()
1321	PROTOTYPE:	1120	PROTOTYPE:
1322	CODE:	1121	CODE:
1323	if (nreqs)
1324	poll_wait ();	1122	poll_wait ();
1325		1123
1326	int	1124	int
1327	nreqs()	1125	nreqs()
1328	PROTOTYPE:	1126	PROTOTYPE:
1329	CODE:	1127	CODE:
1330	RETVAL = nreqs;	1128	RETVAL = eio_nreqs ();
1331	OUTPUT:	1129	OUTPUT:
1332	RETVAL	1130	RETVAL
1333		1131
		1132	int
		1133	nready()
		1134	PROTOTYPE:
		1135	CODE:
		1136	RETVAL = eio_nready ();
		1137	OUTPUT:
		1138	RETVAL
		1139
		1140	int
		1141	npending()
		1142	PROTOTYPE:
		1143	CODE:
		1144	RETVAL = eio_npending ();
		1145	OUTPUT:
		1146	RETVAL
		1147
		1148	int
		1149	nthreads()
		1150	PROTOTYPE:
		1151	CODE:
		1152	RETVAL = eio_nthreads ();
		1153	OUTPUT:
		1154	RETVAL
		1155
		1156	void _on_next_submit (SV *cb)
		1157	CODE:
		1158	SvREFCNT_dec (on_next_submit);
		1159	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1160
1334	PROTOTYPES: DISABLE	1161	PROTOTYPES: DISABLE
1335		1162
1336	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1163	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1337		1164
1338	void	1165	void
1339	cancel (aio_req_ornot req)	1166	cancel (aio_req_ornot req)
1340	PROTOTYPE:
1341	CODE:	1167	CODE:
1342	req_cancel (req);	1168	eio_cancel (req);
1343		1169
1344	void	1170	void
1345	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1171	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1346	CODE:	1172	PPCODE:
		1173	{
		1174	if (GIMME_V != G_VOID)
		1175	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1176
		1177	if (items > 1)
		1178	{
		1179	SV *cb_cv = get_cb (callback);
		1180
1347	SvREFCNT_dec (req->callback);	1181	SvREFCNT_dec (req->callback);
1348	req->callback = newSVsv (callback);	1182	req->callback = SvREFCNT_inc (cb_cv);
		1183	}
		1184	}
1349		1185
1350	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1186	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1351		1187
1352	void	1188	void
1353	add (aio_req grp, ...)	1189	add (aio_req grp, ...)
1354	PPCODE:	1190	PPCODE:
1355	{	1191	{
1356	int i;	1192	int i;
1357	aio_req req;
1358		1193
1359	if (grp->fd == 2)	1194	if (grp->int1 == 2)
1360	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1195	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1361		1196
1362	for (i = 1; i < items; ++i )	1197	for (i = 1; i < items; ++i )
1363	{	1198	{
		1199	aio_req req;
		1200
1364	if (GIMME_V != G_VOID)	1201	if (GIMME_V != G_VOID)
1365	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1202	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1366		1203
1367	req = SvAIO_REQ (ST (i));	1204	req = SvAIO_REQ (ST (i));
1368		1205
1369	if (req)	1206	if (req)
1370	{	1207	eio_grp_add (grp, req);
1371	++grp->length;
1372	req->grp = grp;
1373
1374	req->grp_prev = 0;
1375	req->grp_next = grp->grp_first;
1376
1377	if (grp->grp_first)
1378	grp->grp_first->grp_prev = req;
1379
1380	grp->grp_first = req;
1381	}	1208	}
1382	}
1383	}	1209	}
		1210
		1211	void
		1212	cancel_subs (aio_req_ornot req)
		1213	CODE:
		1214	req_cancel_subs (req);
1384		1215
1385	void	1216	void
1386	result (aio_req grp, ...)	1217	result (aio_req grp, ...)
1387	CODE:	1218	CODE:
1388	{	1219	{
1389	int i;	1220	int i;
		1221	AV *av;
		1222
		1223	grp->errorno = errno;
		1224
1390	AV *av = newAV ();	1225	av = newAV ();
		1226	av_extend (av, items - 1);
1391		1227
1392	for (i = 1; i < items; ++i )	1228	for (i = 1; i < items; ++i )
1393	av_push (av, newSVsv (ST (i)));	1229	av_push (av, newSVsv (ST (i)));
1394		1230
1395	SvREFCNT_dec (grp->data);	1231	SvREFCNT_dec (grp->sv1);
1396	grp->data = (SV *)av;	1232	grp->sv1 = (SV *)av;
1397	}	1233	}
1398		1234
1399	void	1235	void
		1236	errno (aio_req grp, int errorno = errno)
		1237	CODE:
		1238	grp->errorno = errorno;
		1239
		1240	void
1400	feed_limit (aio_req grp, int limit)	1241	limit (aio_req grp, int limit)
1401	CODE:	1242	CODE:
1402	grp->fd2 = limit;	1243	eio_grp_limit (grp, limit);
1403	aio_grp_feed (grp);
1404		1244
1405	void	1245	void
1406	feed (aio_req grp, SV *callback=&PL_sv_undef)	1246	feed (aio_req grp, SV *callback=&PL_sv_undef)
1407	CODE:	1247	CODE:
1408	{	1248	{
1409	SvREFCNT_dec (grp->fh2);	1249	SvREFCNT_dec (grp->sv2);
1410	grp->fh2 = newSVsv (callback);	1250	grp->sv2 = newSVsv (callback);
		1251	grp->feed = aio_grp_feed;
1411		1252
1412	if (grp->fd2 <= 0)	1253	if (grp->int2 <= 0)
1413	grp->fd2 = 2;	1254	grp->int2 = 2;
1414		1255
1415	aio_grp_feed (grp);	1256	eio_grp_limit (grp, grp->int2);
1416	}	1257	}
1417		1258

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