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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.59 by root, Mon Oct 23 18:56:27 2006 UTC vs.
Revision 1.156 by root, Thu Nov 12 00:01:52 2009 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	14	#include <sys/types.h>
17	#include <sys/stat.h>	15	#include <sys/stat.h>
18	#include <limits.h>	16	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	17	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	18	#include <sched.h>
23		19
24	#if HAVE_SENDFILE	20	/* perl namespace pollution */
25	# if __linux	21	#undef VERSION
26	# include <sys/sendfile.h>	22
27	# elif __freebsd	23	#ifdef _WIN32
28	# include <sys/socket.h>	24
29	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
30	# elif __hpux	26	# undef malloc
31	# include <sys/socket.h>	27	# undef free
32	# elif __solaris /* not yet */	28
33	# include <sys/sendfile.h>	29	// perl overrides all those nice win32 functions
		30	# undef open
		31	# undef read
		32	# undef write
		33	# undef send
		34	# undef recv
		35	# undef stat
		36	# undef fstat
		37	# define lstat stat
		38	# undef truncate
		39	# undef ftruncate
		40	# undef open
		41	# undef close
		42	# undef unlink
		43	# undef rmdir
		44	# undef rename
		45	# undef lseek
		46
		47	# define chown(a,b,c) (errno = ENOSYS, -1)
		48	# define fchown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchmod(a,b) (errno = ENOSYS, -1)
		50	# define symlink(a,b) (errno = ENOSYS, -1)
		51	# define readlink(a,b,c) (errno = ENOSYS, -1)
		52	# define mknod(a,b,c) (errno = ENOSYS, -1)
		53	# define truncate(a,b) (errno = ENOSYS, -1)
		54	# define ftruncate(fd,o) chsize ((fd), (o))
		55	# define fsync(fd) _commit (fd)
		56	# define opendir(fd) (errno = ENOSYS, 0)
		57	# define readdir(fd) (errno = ENOSYS, -1)
		58	# define closedir(fd) (errno = ENOSYS, -1)
		59	# define mkdir(a,b) mkdir (a)
		60
34	# else	61	#else
35	# error sendfile support requested but not available	62
36	# endif	63	# include <sys/time.h>
		64	# include <sys/select.h>
		65	# include <unistd.h>
		66	# include <utime.h>
		67	# include <signal.h>
		68	# define EIO_STRUCT_DIRENT struct dirent
		69
37	#endif	70	#endif
38		71
39	/* used for struct dirent, AIX doesn't provide it */	72	/* perl stupidly overrides readdir and maybe others */
40	#ifndef NAME_MAX	73	/* with thread-unsafe versions, imagine that :( */
41	# define NAME_MAX 4096	74	#undef readdir
		75	#undef opendir
		76	#undef closedir
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
42	#endif	89	#endif
43		90
44	#if __ia64	91	/*****************************************************************************/
45	# define STACKSIZE 65536	92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
46	#else	95	#else
47	# define STACKSIZE 8192	96	# define expect(expr,value) (expr)
48	#endif	97	#endif
49		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/eio.h"
		119
		120	#ifndef POSIX_FADV_NORMAL
		121	# define POSIX_FADV_NORMAL 0
		122	# define NO_FADVISE 1
		123	#endif
		124
		125	#ifndef POSIX_FADV_SEQUENTIAL
		126	# define POSIX_FADV_SEQUENTIAL 0
		127	#endif
		128
		129	#ifndef POSIX_FADV_RANDOM
		130	# define POSIX_FADV_RANDOM 0
		131	#endif
		132
		133	#ifndef POSIX_FADV_NOREUSE
		134	# define POSIX_FADV_NOREUSE 0
		135	#endif
		136
		137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	static int req_invoke (eio_req *req);
		146	#define EIO_FINISH(req) req_invoke (req)
		147	static void req_destroy (eio_req *grp);
		148	#define EIO_DESTROY(req) req_destroy (req)
		149
50	enum {	150	enum {
51	REQ_QUIT,	151	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,
62	};	152	};
63		153
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	154	#include "libeio/eio.c"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		155
67	typedef struct aio_cb
68	{
69	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;
76	SV *fh, *fh2;
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */
88	unsigned char pri;
89	unsigned char flags;
90	} aio_cb;
91
92	enum {
93	FLAG_CANCELLED = 0x01,
94	};
95
96	typedef aio_cb *aio_req;	156	typedef eio_req *aio_req;
97	typedef aio_cb *aio_req_ornot;	157	typedef eio_req *aio_req_ornot;
98		158
99	static int started, wanted;	159	static SV *on_next_submit;
100	static volatile int nreqs;	160	static int next_pri = EIO_PRI_DEFAULT;
101	static int max_outstanding = 1<<30;	161	static int max_outstanding;
102	static int respipe [2];
103		162
104	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	163	static s_epipe respipe;
105	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
106	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
107		164
108	static volatile aio_req reqs, reqe; /* queue start, queue end */	165	static void req_destroy (aio_req req);
109	static volatile aio_req ress, rese; /* queue start, queue end */
110
111	static void req_invoke (aio_req req);	166	static void req_cancel (aio_req req);
112	static void req_free (aio_req req);	167
		168	static void want_poll (void)
		169	{
		170	/* write a dummy byte to the pipe so fh becomes ready */
		171	s_epipe_signal (&respipe);
		172	}
		173
		174	static void done_poll (void)
		175	{
		176	/* read any signals sent by the worker threads */
		177	s_epipe_drain (&respipe);
		178	}
113		179
114	/* must be called at most once */	180	/* must be called at most once */
115	static SV *req_sv (aio_req req, const char *klass)	181	static SV *req_sv (aio_req req, HV *stash)
116	{	182	{
117	if (!req->self)	183	if (!req->self)
118	{	184	{
119	req->self = (SV *)newHV ();	185	req->self = (SV *)newHV ();
120	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	186	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
121	}	187	}
122		188
123	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	189	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
124	}	190	}
125		191
126	static aio_req SvAIO_REQ (SV *sv)	192	static aio_req SvAIO_REQ (SV *sv)
127	{	193	{
128	MAGIC *mg;	194	MAGIC *mg;
129		195
130	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	196	if (!SvROK (sv)
		197	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		198	&& SvSTASH (SvRV (sv)) != aio_req_stash
		199	&& !sv_derived_from (sv, "IO::AIO::REQ")))
131	croak ("object of class " AIO_REQ_KLASS " expected");	200	croak ("object of class IO::AIO::REQ expected");
132		201
133	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
134		203
135	return mg ? (aio_req)mg->mg_ptr : 0;	204	return mg ? (aio_req)mg->mg_ptr : 0;
136	}	205	}
137		206
138	static void aio_grp_feed (aio_req grp)	207	static void aio_grp_feed (aio_req grp)
139	{	208	{
140	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	209	if (grp->sv2 && SvOK (grp->sv2))
141	{	210	{
142	int old_len = grp->length;	211	dSP;
143		212
144	if (grp->fh2 && SvOK (grp->fh2))	213	ENTER;
		214	SAVETMPS;
		215	PUSHMARK (SP);
		216	XPUSHs (req_sv (grp, aio_grp_stash));
		217	PUTBACK;
		218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		219	SPAGAIN;
		220	FREETMPS;
		221	LEAVE;
		222	}
		223	}
		224
		225	static void req_submit (eio_req *req)
		226	{
		227	eio_submit (req);
		228
		229	if (expect_false (on_next_submit))
		230	{
		231	dSP;
		232	SV *cb = sv_2mortal (on_next_submit);
		233
		234	on_next_submit = 0;
		235
		236	PUSHMARK (SP);
		237	PUTBACK;
		238	call_sv (cb, G_DISCARD | G_EVAL);
		239	}
		240	}
		241
		242	static int req_invoke (eio_req *req)
		243	{
		244	dSP;
		245
		246	if (req->flags & FLAG_SV2_RO_OFF)
		247	SvREADONLY_off (req->sv2);
		248
		249	if (!EIO_CANCELLED (req) && req->callback)
		250	{
		251	ENTER;
		252	SAVETMPS;
		253	PUSHMARK (SP);
		254	EXTEND (SP, 1);
		255
		256	switch (req->type)
145	{	257	{
146	dSP;	258	case EIO_READDIR:
		259	{
		260	SV *rv = &PL_sv_undef;
147		261
148	ENTER;	262	if (req->result >= 0)
149	SAVETMPS;	263	{
150	PUSHMARK (SP);	264	int i;
151	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	265	char *names = (char *)req->ptr2;
152	PUTBACK;	266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
153	call_sv (grp->fh2, G_VOID | G_EVAL);	267	AV *av = newAV ();
154	SPAGAIN;	268
155	FREETMPS;	269	av_extend (av, req->result - 1);
156	LEAVE;	270
		271	for (i = 0; i < req->result; ++i)
		272	{
		273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		276
		277	if (req->int1 & EIO_READDIR_CUSTOM2)
		278	{
		279	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		280	AV *avent = newAV ();
		281
		282	av_extend (avent, 2);
		283
		284	if (!sv_type [ent->type])
		285	{
		286	sv_type [ent->type] = newSViv (ent->type);
		287	SvREADONLY_on (sv_type [ent->type]);
		288	}
		289
		290	av_store (avent, 0, namesv);
		291	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		292	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		293
		294	av_store (av, i, newRV_noinc ((SV *)avent));
		295	}
		296	else
		297	av_store (av, i, namesv);
		298
		299	++ent;
		300	}
		301	else
		302	{
		303	SV *name = newSVpv (names, 0);
		304	av_store (av, i, name);
		305	names += SvCUR (name) + 1;
		306	}
		307	}
		308
		309	rv = sv_2mortal (newRV_noinc ((SV *)av));
		310	}
		311
		312	PUSHs (rv);
		313
		314	if (req->int1 & EIO_READDIR_CUSTOM1)
		315	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		316	}
		317	break;
		318
		319	case EIO_OPEN:
		320	{
		321	/* convert fd to fh */
		322	SV *fh = &PL_sv_undef;
		323
		324	if (req->result >= 0)
		325	{
		326	GV *gv = (GV *)sv_newmortal ();
		327	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		328	char sym [64];
		329	int symlen;
		330
		331	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		332	gv_init (gv, aio_stash, sym, symlen, 0);
		333
		334	symlen = snprintf (
		335	sym,
		336	sizeof (sym),
		337	"%s&=%d",
		338	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		339	(int)req->result
		340	);
		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
		346	PUSHs (fh);
		347	}
		348	break;
		349
		350	case EIO_GROUP:
		351	req->int1 = 2; /* mark group as finished */
		352
		353	if (req->sv1)
		354	{
		355	int i;
		356	AV *av = (AV *)req->sv1;
		357
		358	EXTEND (SP, AvFILL (av) + 1);
		359	for (i = 0; i <= AvFILL (av); ++i)
		360	PUSHs (*av_fetch (av, i, 0));
		361	}
		362	break;
		363
		364	case EIO_NOP:
		365	case EIO_BUSY:
		366	break;
		367
		368	case EIO_READLINK:
		369	if (req->result > 0)
		370	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		371	break;
		372
		373	case EIO_STAT:
		374	case EIO_LSTAT:
		375	case EIO_FSTAT:
		376	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		377	PL_laststatval = req->result;
		378	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		379	PUSHs (sv_2mortal (newSViv (req->result)));
		380	break;
		381
		382	case EIO_READ:
		383	{
		384	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		385	*SvEND (req->sv2) = 0;
		386	SvPOK_only (req->sv2);
		387	SvSETMAGIC (req->sv2);
		388	PUSHs (sv_2mortal (newSViv (req->result)));
		389	}
		390	break;
		391
		392	case EIO_DUP2:
		393	if (req->result > 0)
		394	req->result = 0;
		395	/* FALLTHROUGH */
		396
		397	default:
		398	PUSHs (sv_2mortal (newSViv (req->result)));
		399	break;
157	}	400	}
158		401
159	/* stop if no progress has been made */	402	errno = req->errorno;
160	if (old_len == grp->length)	403
161	{	404	PUTBACK;
162	SvREFCNT_dec (grp->fh2);	405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
163	grp->fh2 = 0;	406	SPAGAIN;
164	break;	407
165	}	408	FREETMPS;
		409	LEAVE;
		410
		411	PUTBACK;
166	}	412	}
167	}
168		413
169	static void aio_grp_dec (aio_req grp)	414	return !!SvTRUE (ERRSV);
170	{
171	--grp->length;
172
173	/* call feeder, if applicable */
174	aio_grp_feed (grp);
175
176	/* finish, if done */
177	if (!grp->length && grp->fd)
178	{
179	req_invoke (grp);
180	req_free (grp);
181	}
182	}	415	}
183		416
184	static void poll_wait ()
185	{
186	if (nreqs && !ress)
187	{
188	fd_set rfd;
189	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);
191
192	select (respipe [0] + 1, &rfd, 0, 0, 0);
193	}
194	}
195
196	static void req_invoke (aio_req req)
197	{
198	dSP;
199	int errorno = errno;
200
201	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
202	return;
203
204	errno = req->errorno;
205
206	ENTER;
207	SAVETMPS;
208	PUSHMARK (SP);
209	EXTEND (SP, 1);
210
211	switch (req->type)
212	{
213	case REQ_READDIR:
214	{
215	SV *rv = &PL_sv_undef;
216
217	if (req->result >= 0)
218	{
219	char *buf = req->data2ptr;
220	AV *av = newAV ();
221
222	while (req->result)
223	{
224	SV *sv = newSVpv (buf, 0);
225
226	av_push (av, sv);
227	buf += SvCUR (sv) + 1;
228	req->result--;
229	}
230
231	rv = sv_2mortal (newRV_noinc ((SV *)av));
232	}
233
234	PUSHs (rv);
235	}
236	break;
237
238	case REQ_OPEN:
239	{
240	/* convert fd to fh */
241	SV *fh;
242
243	PUSHs (sv_2mortal (newSViv (req->result)));
244	PUTBACK;
245	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
246	SPAGAIN;
247
248	fh = SvREFCNT_inc (POPs);
249
250	PUSHMARK (SP);
251	XPUSHs (sv_2mortal (fh));
252	}
253	break;
254
255	case REQ_GROUP:
256	req->fd = 2; /* mark group as finished */
257
258	if (req->data)
259	{
260	int i;
261	AV *av = (AV *)req->data;
262
263	EXTEND (SP, AvFILL (av) + 1);
264	for (i = 0; i <= AvFILL (av); ++i)
265	PUSHs (*av_fetch (av, i, 0));
266	}
267	break;
268
269	case REQ_NOP:
270	case REQ_SLEEP:
271	break;
272
273	default:
274	PUSHs (sv_2mortal (newSViv (req->result)));
275	break;
276	}
277
278
279	PUTBACK;
280	call_sv (req->callback, G_VOID | G_EVAL);
281	SPAGAIN;
282
283	FREETMPS;
284	LEAVE;
285
286	errno = errorno;
287
288	if (SvTRUE (ERRSV))
289	{
290	req_free (req);
291	croak (0);
292	}
293	}
294
295	static void req_free (aio_req req)	417	static void req_destroy (aio_req req)
296	{	418	{
297	if (req->grp)
298	{
299	aio_req grp = req->grp;
300
301	/* unlink request */
302	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
303	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
304
305	if (grp->grp_first == req)
306	grp->grp_first = req->grp_next;
307
308	aio_grp_dec (grp);
309	}
310
311	if (req->self)	419	if (req->self)
312	{	420	{
313	sv_unmagic (req->self, PERL_MAGIC_ext);	421	sv_unmagic (req->self, PERL_MAGIC_ext);
314	SvREFCNT_dec (req->self);	422	SvREFCNT_dec (req->self);
315	}	423	}
316		424
317	SvREFCNT_dec (req->data);
318	SvREFCNT_dec (req->fh);	425	SvREFCNT_dec (req->sv1);
319	SvREFCNT_dec (req->fh2);	426	SvREFCNT_dec (req->sv2);
320	SvREFCNT_dec (req->callback);	427	SvREFCNT_dec (req->callback);
321	Safefree (req->statdata);
322
323	if (req->type == REQ_READDIR && req->result >= 0)
324	free (req->data2ptr);
325		428
326	Safefree (req);	429	Safefree (req);
327	}	430	}
328		431
329	static void req_cancel (aio_req req)	432	static void req_cancel_subs (aio_req grp)
330	{	433	{
331	req->flags |= FLAG_CANCELLED;	434	aio_req sub;
332		435
333	if (req->type == REQ_GROUP)	436	if (grp->type != EIO_GROUP)
		437	return;
		438
		439	SvREFCNT_dec (grp->sv2);
		440	grp->sv2 = 0;
		441
		442	eio_grp_cancel (grp);
		443	}
		444
		445	static void
		446	create_respipe (void)
		447	{
		448	if (s_epipe_renew (&respipe))
		449	croak ("IO::AIO: unable to initialize result pipe");
		450	}
		451
		452	static void poll_wait (void)
		453	{
		454	while (eio_nreqs ())
334	{	455	{
335	aio_req sub;	456	int size;
336		457
337	for (sub = req->grp_first; sub; sub = sub->grp_next)	458	X_LOCK (reslock);
338	req_cancel (sub);	459	size = res_queue.size;
		460	X_UNLOCK (reslock);
		461
		462	if (size)
		463	return;
		464
		465	etp_maybe_start_thread ();
		466
		467	s_epipe_wait (&respipe);
339	}	468	}
340	}	469	}
341		470
342	static int poll_cb ()	471	static int poll_cb (void)
343	{	472	{
344	dSP;
345	int count = 0;
346	int do_croak = 0;
347	aio_req req;
348
349	for (;;)	473	for (;;)
350	{	474	{
351	pthread_mutex_lock (&reslock);	475	int res = eio_poll ();
352	req = ress;
353		476
354	if (req)	477	if (res > 0)
355	{
356	ress = req->next;
357
358	if (!ress)
359	{
360	/* read any signals sent by the worker threads */
361	char buf [32];
362	while (read (respipe [0], buf, 32) == 32)
363	;
364
365	rese = 0;
366	}
367	}
368
369	pthread_mutex_unlock (&reslock);
370
371	if (!req)
372	break;	478	croak (0);
373		479
374	--nreqs;	480	if (!max_outstanding || max_outstanding > eio_nreqs ())
		481	return res;
375		482
376	if (req->type == REQ_QUIT)	483	poll_wait ();
377	started--;
378	else if (req->type == REQ_GROUP && req->length)
379	{
380	req->fd = 1; /* mark request as delayed */
381	continue;
382	}
383	else
384	{
385	if (req->type == REQ_READ)
386	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
387
388	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
389	SvREADONLY_off (req->data);
390
391	if (req->statdata)
392	{
393	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
394	PL_laststatval = req->result;
395	PL_statcache = *(req->statdata);
396	}
397
398	req_invoke (req);
399
400	count++;
401	}
402
403	req_free (req);
404	}	484	}
405
406	return count;
407	}
408
409	static void *aio_proc(void *arg);
410
411	static void start_thread (void)
412	{
413	sigset_t fullsigset, oldsigset;
414	pthread_t tid;
415	pthread_attr_t attr;
416
417	pthread_attr_init (&attr);
418	pthread_attr_setstacksize (&attr, STACKSIZE);
419	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
420
421	sigfillset (&fullsigset);
422	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
423
424	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
425	started++;
426
427	sigprocmask (SIG_SETMASK, &oldsigset, 0);
428	}
429
430	static void req_send (aio_req req)
431	{
432	while (started < wanted && nreqs >= started)
433	start_thread ();
434
435	++nreqs;
436
437	pthread_mutex_lock (&reqlock);
438
439	req->next = 0;
440
441	if (reqe)
442	{
443	reqe->next = req;
444	reqe = req;
445	}
446	else
447	reqe = reqs = req;
448
449	pthread_cond_signal (&reqwait);
450	pthread_mutex_unlock (&reqlock);
451
452	if (nreqs > max_outstanding)
453	for (;;)
454	{
455	poll_cb ();
456
457	if (nreqs <= max_outstanding)
458	break;
459
460	poll_wait ();
461	}
462	}
463
464	static void end_thread (void)
465	{
466	aio_req req;
467	Newz (0, req, 1, aio_cb);
468	req->type = REQ_QUIT;
469
470	req_send (req);
471	}
472
473	static void min_parallel (int nthreads)
474	{
475	if (wanted < nthreads)
476	wanted = nthreads;
477	}
478
479	static void max_parallel (int nthreads)
480	{
481	int cur = started;
482
483	if (wanted > nthreads)
484	wanted = nthreads;
485
486	while (cur > wanted)
487	{
488	end_thread ();
489	cur--;
490	}
491
492	while (started > wanted)
493	{
494	poll_wait ();
495	poll_cb ();
496	}
497	}
498
499	static void create_pipe ()
500	{
501	if (pipe (respipe))
502	croak ("unable to initialize result pipe");
503
504	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
505	croak ("cannot set result pipe to nonblocking mode");
506
507	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
508	croak ("cannot set result pipe to nonblocking mode");
509	}
510
511	/*****************************************************************************/
512	/* work around various missing functions */
513
514	#if !HAVE_PREADWRITE
515	# define pread aio_pread
516	# define pwrite aio_pwrite
517
518	/*
519	* make our pread/pwrite safe against themselves, but not against
520	* normal read/write by using a mutex. slows down execution a lot,
521	* but that's your problem, not mine.
522	*/
523	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
524
525	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
526	{
527	ssize_t res;
528	off_t ooffset;
529
530	pthread_mutex_lock (&preadwritelock);
531	ooffset = lseek (fd, 0, SEEK_CUR);
532	lseek (fd, offset, SEEK_SET);
533	res = read (fd, buf, count);
534	lseek (fd, ooffset, SEEK_SET);
535	pthread_mutex_unlock (&preadwritelock);
536
537	return res;
538	}
539
540	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
541	{
542	ssize_t res;
543	off_t ooffset;
544
545	pthread_mutex_lock (&preadwritelock);
546	ooffset = lseek (fd, 0, SEEK_CUR);
547	lseek (fd, offset, SEEK_SET);
548	res = write (fd, buf, count);
549	lseek (fd, offset, SEEK_SET);
550	pthread_mutex_unlock (&preadwritelock);
551
552	return res;
553	}
554	#endif
555
556	#if !HAVE_FDATASYNC
557	# define fdatasync fsync
558	#endif
559
560	#if !HAVE_READAHEAD
561	# define readahead aio_readahead
562
563	static ssize_t readahead (int fd, off_t offset, size_t count)
564	{
565	char readahead_buf[4096];
566
567	while (count > 0)
568	{
569	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
570
571	pread (fd, readahead_buf, len, offset);
572	offset += len;
573	count -= len;
574	}
575
576	errno = 0;
577	}
578	#endif
579
580	#if !HAVE_READDIR_R
581	# define readdir_r aio_readdir_r
582
583	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
584
585	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
586	{
587	struct dirent *e;
588	int errorno;
589
590	pthread_mutex_lock (&readdirlock);
591
592	e = readdir (dirp);
593	errorno = errno;
594
595	if (e)
596	{
597	*res = ent;
598	strcpy (ent->d_name, e->d_name);
599	}
600	else
601	*res = 0;
602
603	pthread_mutex_unlock (&readdirlock);
604
605	errno = errorno;
606	return e ? 0 : -1;
607	}
608	#endif
609
610	/* sendfile always needs emulation */
611	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
612	{
613	ssize_t res;
614
615	if (!count)
616	return 0;
617
618	#if HAVE_SENDFILE
619	# if __linux
620	res = sendfile (ofd, ifd, &offset, count);
621
622	# elif __freebsd
623	/*
624	* Of course, the freebsd sendfile is a dire hack with no thoughts
625	* wasted on making it similar to other I/O functions.
626	*/
627	{
628	off_t sbytes;
629	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
630
631	if (res < 0 && sbytes)
632	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
633	res = sbytes;
634	}
635
636	# elif __hpux
637	res = sendfile (ofd, ifd, offset, count, 0, 0);
638
639	# elif __solaris
640	{
641	struct sendfilevec vec;
642	size_t sbytes;
643
644	vec.sfv_fd = ifd;
645	vec.sfv_flag = 0;
646	vec.sfv_off = offset;
647	vec.sfv_len = count;
648
649	res = sendfilev (ofd, &vec, 1, &sbytes);
650
651	if (res < 0 && sbytes)
652	res = sbytes;
653	}
654
655	# endif
656	#else
657	res = -1;
658	errno = ENOSYS;
659	#endif
660
661	if (res < 0
662	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
663	#if __solaris
664	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
665	#endif
666	)
667	)
668	{
669	/* emulate sendfile. this is a major pain in the ass */
670	char buf[4096];
671	res = 0;
672
673	while (count)
674	{
675	ssize_t cnt;
676
677	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
678
679	if (cnt <= 0)
680	{
681	if (cnt && !res) res = -1;
682	break;
683	}
684
685	cnt = write (ofd, buf, cnt);
686
687	if (cnt <= 0)
688	{
689	if (cnt && !res) res = -1;
690	break;
691	}
692
693	offset += cnt;
694	res += cnt;
695	count -= cnt;
696	}
697	}
698
699	return res;
700	}
701
702	/* read a full directory */
703	static int scandir_ (const char *path, void **namesp)
704	{
705	DIR *dirp = opendir (path);
706	union
707	{
708	struct dirent d;
709	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
710	} u;
711	struct dirent *entp;
712	char *name, *names;
713	int memlen = 4096;
714	int memofs = 0;
715	int res = 0;
716	int errorno;
717
718	if (!dirp)
719	return -1;
720
721	names = malloc (memlen);
722
723	for (;;)
724	{
725	errno = 0, readdir_r (dirp, &u.d, &entp);
726
727	if (!entp)
728	break;
729
730	name = entp->d_name;
731
732	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
733	{
734	int len = strlen (name) + 1;
735
736	res++;
737
738	while (memofs + len > memlen)
739	{
740	memlen *= 2;
741	names = realloc (names, memlen);
742	if (!names)
743	break;
744	}
745
746	memcpy (names + memofs, name, len);
747	memofs += len;
748	}
749	}
750
751	errorno = errno;
752	closedir (dirp);
753
754	if (errorno)
755	{
756	free (names);
757	errno = errorno;
758	res = -1;
759	}
760
761	*namesp = (void *)names;
762	return res;
763	}
764
765	/*****************************************************************************/
766
767	static void *aio_proc (void *thr_arg)
768	{
769	aio_req req;
770	int type;
771
772	do
773	{
774	pthread_mutex_lock (&reqlock);
775
776	for (;;)
777	{
778	req = reqs;
779
780	if (reqs)
781	{
782	reqs = reqs->next;
783	if (!reqs) reqe = 0;
784	}
785
786	if (req)
787	break;
788
789	pthread_cond_wait (&reqwait, &reqlock);
790	}
791
792	pthread_mutex_unlock (&reqlock);
793
794	errno = 0; /* strictly unnecessary */
795
796	if (!(req->flags & FLAG_CANCELLED))
797	switch (type = req->type) /* remember type for QUIT check */
798	{
799	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
800	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
801
802	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
803	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
804
805	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
806	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
807	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
808
809	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
810	case REQ_CLOSE: req->result = close (req->fd); break;
811	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
812	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
813	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
814	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
815	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
816
817	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
818	case REQ_FSYNC: req->result = fsync (req->fd); break;
819	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
820
821	case REQ_SLEEP:
822	{
823	struct timeval tv;
824
825	tv.tv_sec = req->fd;
826	tv.tv_usec = req->fd2;
827
828	req->result = select (0, 0, 0, 0, &tv);
829	}
830
831	case REQ_GROUP:
832	case REQ_NOP:
833	case REQ_QUIT:
834	break;
835
836	default:
837	req->result = ENOSYS;
838	break;
839	}
840
841	req->errorno = errno;
842
843	pthread_mutex_lock (&reslock);
844
845	req->next = 0;
846
847	if (rese)
848	{
849	rese->next = req;
850	rese = req;
851	}
852	else
853	{
854	rese = ress = req;
855
856	/* write a dummy byte to the pipe so fh becomes ready */
857	write (respipe [1], &respipe, 1);
858	}
859
860	pthread_mutex_unlock (&reslock);
861	}
862	while (type != REQ_QUIT);
863
864	return 0;
865	}
866
867	/*****************************************************************************/
868
869	static void atfork_prepare (void)
870	{
871	pthread_mutex_lock (&reqlock);
872	pthread_mutex_lock (&reslock);
873	#if !HAVE_PREADWRITE
874	pthread_mutex_lock (&preadwritelock);
875	#endif
876	#if !HAVE_READDIR_R
877	pthread_mutex_lock (&readdirlock);
878	#endif
879	}
880
881	static void atfork_parent (void)
882	{
883	#if !HAVE_READDIR_R
884	pthread_mutex_unlock (&readdirlock);
885	#endif
886	#if !HAVE_PREADWRITE
887	pthread_mutex_unlock (&preadwritelock);
888	#endif
889	pthread_mutex_unlock (&reslock);
890	pthread_mutex_unlock (&reqlock);
891	}	485	}
892		486
893	static void atfork_child (void)	487	static void atfork_child (void)
894	{	488	{
895	aio_req prv;
896
897	started = 0;
898
899	while (reqs)
900	{
901	prv = reqs;
902	reqs = prv->next;
903	req_free (prv);
904	}
905
906	reqs = reqe = 0;
907
908	while (ress)
909	{
910	prv = ress;
911	ress = prv->next;
912	req_free (prv);
913	}
914
915	ress = rese = 0;
916
917	close (respipe [0]);
918	close (respipe [1]);
919	create_pipe ();	489	create_respipe ();
		490	}
920		491
921	atfork_parent ();	492	static SV *
		493	get_cb (SV *cb_sv)
		494	{
		495	SvGETMAGIC (cb_sv);
		496	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
922	}	497	}
923		498
924	#define dREQ \	499	#define dREQ \
		500	SV *cb_cv; \
925	aio_req req; \	501	aio_req req; \
		502	int req_pri = next_pri; \
		503	next_pri = EIO_PRI_DEFAULT; \
926	\	504	\
927	if (SvOK (callback) && !SvROK (callback)) \	505	cb_cv = get_cb (callback); \
928	croak ("callback must be undef or of reference type"); \
929	\	506	\
930	Newz (0, req, 1, aio_cb); \	507	Newz (0, req, 1, eio_req); \
931	if (!req) \	508	if (!req) \
932	croak ("out of memory during aio_req allocation"); \	509	croak ("out of memory during eio_req allocation"); \
933	\	510	\
934	req->callback = newSVsv (callback)	511	req->callback = SvREFCNT_inc (cb_cv); \
		512	req->pri = req_pri
935		513
936	#define REQ_SEND \	514	#define REQ_SEND \
		515	PUTBACK; \
937	req_send (req); \	516	req_submit (req); \
		517	SPAGAIN; \
938	\	518	\
939	if (GIMME_V != G_VOID) \	519	if (GIMME_V != G_VOID) \
940	XPUSHs (req_sv (req, AIO_REQ_KLASS));	520	XPUSHs (req_sv (req, aio_req_stash));
941		521
942	MODULE = IO::AIO PACKAGE = IO::AIO	522	MODULE = IO::AIO PACKAGE = IO::AIO
943		523
944	PROTOTYPES: ENABLE	524	PROTOTYPES: ENABLE
945		525
946	BOOT:	526	BOOT:
947	{	527	{
		528	static const struct {
		529	const char *name;
		530	IV iv;
		531	} *civ, const_iv[] = {
		532	# define const_iv(name, value) { # name, (IV) value },
		533	# define const_eio(name) { # name, (IV) EIO_ ## name },
		534	const_iv (EXDEV , EXDEV)
		535	const_iv (ENOSYS , ENOSYS)
		536	const_iv (O_RDONLY, O_RDONLY)
		537	const_iv (O_WRONLY, O_WRONLY)
		538	const_iv (O_CREAT , O_CREAT)
		539	const_iv (O_TRUNC , O_TRUNC)
		540	#ifndef _WIN32
		541	const_iv (S_IFIFO , S_IFIFO)
		542	#endif
		543	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		544	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		545	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		546	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		547	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		548	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		549
		550	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		551	const_eio (SYNC_FILE_RANGE_WRITE)
		552	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		553
		554	const_eio (READDIR_DENTS)
		555	const_eio (READDIR_DIRS_FIRST)
		556	const_eio (READDIR_STAT_ORDER)
		557	const_eio (READDIR_FOUND_UNKNOWN)
		558
		559	const_eio (DT_UNKNOWN)
		560	const_eio (DT_FIFO)
		561	const_eio (DT_CHR)
		562	const_eio (DT_DIR)
		563	const_eio (DT_BLK)
		564	const_eio (DT_REG)
		565	const_eio (DT_LNK)
		566	const_eio (DT_SOCK)
		567	const_eio (DT_WHT)
		568	};
		569
948	HV *stash = gv_stashpv ("IO::AIO", 1);	570	aio_stash = gv_stashpv ("IO::AIO" , 1);
949	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	571	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
950	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	572	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
951	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
952		573
		574	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		575	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		576
953	create_pipe ();	577	create_respipe ();
954	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
955	}
956		578
		579	if (eio_init (want_poll, done_poll) < 0)
		580	croak ("IO::AIO: unable to initialise eio library");
		581
		582	/* atfork child called in fifo order, so before eio's handler */
		583	X_THREAD_ATFORK (0, 0, atfork_child);
		584	}
		585
957	void	586	void
958	min_parallel (nthreads)	587	max_poll_reqs (int nreqs)
959	int nthreads
960	PROTOTYPE: $	588	PROTOTYPE: $
		589	CODE:
		590	eio_set_max_poll_reqs (nreqs);
961		591
962	void	592	void
963	max_parallel (nthreads)	593	max_poll_time (double nseconds)
964	int nthreads
965	PROTOTYPE: $	594	PROTOTYPE: $
966
967	int
968	max_outstanding (nreqs)
969	int nreqs
970	PROTOTYPE: $
971	CODE:	595	CODE:
972	RETVAL = max_outstanding;	596	eio_set_max_poll_time (nseconds);
		597
		598	void
		599	min_parallel (int nthreads)
		600	PROTOTYPE: $
		601	CODE:
		602	eio_set_min_parallel (nthreads);
		603
		604	void
		605	max_parallel (int nthreads)
		606	PROTOTYPE: $
		607	CODE:
		608	eio_set_max_parallel (nthreads);
		609
		610	void
		611	max_idle (int nthreads)
		612	PROTOTYPE: $
		613	CODE:
		614	eio_set_max_idle (nthreads);
		615
		616	void
		617	max_outstanding (int maxreqs)
		618	PROTOTYPE: $
		619	CODE:
973	max_outstanding = nreqs;	620	max_outstanding = maxreqs;
974		621
975	void	622	void
976	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	623	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
977	SV * pathname
978	int flags
979	int mode
980	SV * callback
981	PROTOTYPE: $$$;$	624	PROTOTYPE: $$$;$
982	PPCODE:	625	PPCODE:
983	{	626	{
984	dREQ;	627	dREQ;
985		628
986	req->type = REQ_OPEN;	629	req->type = EIO_OPEN;
987	req->data = newSVsv (pathname);	630	req->sv1 = newSVsv (pathname);
988	req->dataptr = SvPVbyte_nolen (req->data);	631	req->ptr1 = SvPVbyte_nolen (req->sv1);
989	req->fd = flags;	632	req->int1 = flags;
990	req->mode = mode;	633	req->int2 = mode;
991		634
992	REQ_SEND;	635	REQ_SEND;
993	}	636	}
994		637
995	void	638	void
996	aio_close (fh,callback=&PL_sv_undef)	639	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
997	SV * fh
998	SV * callback
999	PROTOTYPE: $;$	640	PROTOTYPE: $;$
1000	ALIAS:	641	ALIAS:
1001	aio_close = REQ_CLOSE
1002	aio_fsync = REQ_FSYNC	642	aio_fsync = EIO_FSYNC
1003	aio_fdatasync = REQ_FDATASYNC	643	aio_fdatasync = EIO_FDATASYNC
1004	PPCODE:	644	PPCODE:
1005	{	645	{
		646	int fd = s_fileno_croak (fh, 0);
1006	dREQ;	647	dREQ;
1007		648
1008	req->type = ix;	649	req->type = ix;
1009	req->fh = newSVsv (fh);	650	req->sv1 = newSVsv (fh);
1010	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	651	req->int1 = fd;
1011		652
1012	REQ_SEND (req);	653	REQ_SEND (req);
1013	}	654	}
1014		655
1015	void	656	void
		657	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		658	PROTOTYPE: $$$$;$
		659	PPCODE:
		660	{
		661	int fd = s_fileno_croak (fh, 0);
		662	dREQ;
		663
		664	req->type = EIO_SYNC_FILE_RANGE;
		665	req->sv1 = newSVsv (fh);
		666	req->int1 = fd;
		667	req->offs = offset;
		668	req->size = nbytes;
		669	req->int2 = flags;
		670
		671	REQ_SEND (req);
		672	}
		673
		674	void
		675	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		676	PROTOTYPE: $;$
		677	PPCODE:
		678	{
		679	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		680	int fd = s_fileno_croak (fh, 0);
		681	dREQ;
		682
		683	if (close_pipe < 0)
		684	{
		685	int pipefd [2];
		686
		687	if (pipe (pipefd) < 0
		688	|| close (pipefd [1]) < 0
		689	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		690	abort (); /*D*/
		691
		692	close_pipe = pipefd [0];
		693	}
		694
		695	req->type = EIO_DUP2;
		696	req->int1 = close_pipe;
		697	req->sv2 = newSVsv (fh);
		698	req->int2 = fd;
		699
		700	REQ_SEND (req);
		701	}
		702
		703	void
1016	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	704	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1017	SV * fh
1018	UV offset
1019	UV length
1020	SV * data
1021	UV dataoffset
1022	SV * callback
1023	ALIAS:	705	ALIAS:
1024	aio_read = REQ_READ	706	aio_read = EIO_READ
1025	aio_write = REQ_WRITE	707	aio_write = EIO_WRITE
1026	PROTOTYPE: $$$$$;$	708	PROTOTYPE: $$$$$;$
1027	PPCODE:	709	PPCODE:
1028	{	710	{
1029	aio_req req;
1030	STRLEN svlen;	711	STRLEN svlen;
		712	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1031	char *svptr = SvPVbyte (data, svlen);	713	char *svptr = SvPVbyte (data, svlen);
1032		714	UV len = SvUV (length);
1033	SvUPGRADE (data, SVt_PV);
1034	SvPOK_on (data);
1035		715
1036	if (dataoffset < 0)	716	if (dataoffset < 0)
1037	dataoffset += svlen;	717	dataoffset += svlen;
1038		718
1039	if (dataoffset < 0 || dataoffset > svlen)	719	if (dataoffset < 0 || dataoffset > svlen)
1040	croak ("data offset outside of string");	720	croak ("dataoffset outside of data scalar");
1041		721
1042	if (ix == REQ_WRITE)	722	if (ix == EIO_WRITE)
1043	{	723	{
1044	/* write: check length and adjust. */	724	/* write: check length and adjust. */
1045	if (length < 0 || length + dataoffset > svlen)	725	if (!SvOK (length) || len + dataoffset > svlen)
1046	length = svlen - dataoffset;	726	len = svlen - dataoffset;
1047	}	727	}
1048	else	728	else
1049	{	729	{
1050	/* read: grow scalar as necessary */	730	/* read: check type and grow scalar as necessary */
		731	SvUPGRADE (data, SVt_PV);
1051	svptr = SvGROW (data, length + dataoffset);	732	svptr = SvGROW (data, len + dataoffset + 1);
1052	}	733	}
1053
1054	if (length < 0)
1055	croak ("length must not be negative");
1056		734
1057	{	735	{
1058	dREQ;	736	dREQ;
1059		737
1060	req->type = ix;	738	req->type = ix;
1061	req->fh = newSVsv (fh);	739	req->sv1 = newSVsv (fh);
1062	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	740	req->int1 = fd;
1063	: IoOFP (sv_2io (fh)));	741	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1064	req->offset = offset;	742	req->size = len;
1065	req->length = length;
1066	req->data = SvREFCNT_inc (data);	743	req->sv2 = SvREFCNT_inc (data);
1067	req->dataptr = (char *)svptr + dataoffset;	744	req->ptr2 = (char *)svptr + dataoffset;
		745	req->stroffset = dataoffset;
1068		746
1069	if (!SvREADONLY (data))	747	if (!SvREADONLY (data))
1070	{	748	{
1071	SvREADONLY_on (data);	749	SvREADONLY_on (data);
1072	req->data2ptr = (void *)data;	750	req->flags |= FLAG_SV2_RO_OFF;
1073	}	751	}
1074		752
1075	REQ_SEND;	753	REQ_SEND;
1076	}	754	}
1077	}	755	}
1078		756
1079	void	757	void
		758	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		759	PROTOTYPE: $$;$
		760	PPCODE:
		761	{
		762	SV *data;
		763	dREQ;
		764
		765	req->type = EIO_READLINK;
		766	req->sv1 = newSVsv (path);
		767	req->ptr1 = SvPVbyte_nolen (req->sv1);
		768
		769	REQ_SEND;
		770	}
		771
		772	void
1080	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	773	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1081	SV * out_fh
1082	SV * in_fh
1083	UV in_offset
1084	UV length
1085	SV * callback
1086	PROTOTYPE: $$$$;$	774	PROTOTYPE: $$$$;$
1087	PPCODE:	775	PPCODE:
1088	{	776	{
		777	int ifd = s_fileno_croak (in_fh , 0);
		778	int ofd = s_fileno_croak (out_fh, 1);
1089	dREQ;	779	dREQ;
1090		780
1091	req->type = REQ_SENDFILE;	781	req->type = EIO_SENDFILE;
1092	req->fh = newSVsv (out_fh);	782	req->sv1 = newSVsv (out_fh);
1093	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	783	req->int1 = ofd;
1094	req->fh2 = newSVsv (in_fh);	784	req->sv2 = newSVsv (in_fh);
1095	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	785	req->int2 = ifd;
1096	req->offset = in_offset;	786	req->offs = in_offset;
1097	req->length = length;	787	req->size = length;
1098		788
1099	REQ_SEND;	789	REQ_SEND;
1100	}	790	}
1101		791
1102	void	792	void
1103	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	793	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1104	SV * fh
1105	UV offset
1106	IV length
1107	SV * callback
1108	PROTOTYPE: $$$;$	794	PROTOTYPE: $$$;$
1109	PPCODE:	795	PPCODE:
1110	{	796	{
		797	int fd = s_fileno_croak (fh, 0);
1111	dREQ;	798	dREQ;
1112		799
1113	req->type = REQ_READAHEAD;	800	req->type = EIO_READAHEAD;
1114	req->fh = newSVsv (fh);	801	req->sv1 = newSVsv (fh);
1115	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	802	req->int1 = fd;
1116	req->offset = offset;	803	req->offs = offset;
1117	req->length = length;	804	req->size = length;
1118		805
1119	REQ_SEND;	806	REQ_SEND;
1120	}	807	}
1121		808
1122	void	809	void
1123	aio_stat (fh_or_path,callback=&PL_sv_undef)	810	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1124	SV * fh_or_path
1125	SV * callback
1126	ALIAS:	811	ALIAS:
1127	aio_stat = REQ_STAT	812	aio_stat = EIO_STAT
1128	aio_lstat = REQ_LSTAT	813	aio_lstat = EIO_LSTAT
1129	PPCODE:	814	PPCODE:
1130	{	815	{
1131	dREQ;	816	dREQ;
1132		817
1133	New (0, req->statdata, 1, Stat_t);	818	req->sv1 = newSVsv (fh_or_path);
1134	if (!req->statdata)
1135	{
1136	req_free (req);
1137	croak ("out of memory during aio_req->statdata allocation");
1138	}
1139		819
1140	if (SvPOK (fh_or_path))	820	if (SvPOK (req->sv1))
1141	{	821	{
1142	req->type = ix;	822	req->type = ix;
1143	req->data = newSVsv (fh_or_path);
1144	req->dataptr = SvPVbyte_nolen (req->data);	823	req->ptr1 = SvPVbyte_nolen (req->sv1);
1145	}	824	}
1146	else	825	else
1147	{	826	{
1148	req->type = REQ_FSTAT;	827	req->type = EIO_FSTAT;
1149	req->fh = newSVsv (fh_or_path);
1150	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	828	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1151	}	829	}
1152		830
1153	REQ_SEND;	831	REQ_SEND;
1154	}	832	}
1155		833
1156	void	834	void
		835	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		836	PPCODE:
		837	{
		838	dREQ;
		839
		840	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		841	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		842	req->sv1 = newSVsv (fh_or_path);
		843
		844	if (SvPOK (req->sv1))
		845	{
		846	req->type = EIO_UTIME;
		847	req->ptr1 = SvPVbyte_nolen (req->sv1);
		848	}
		849	else
		850	{
		851	req->type = EIO_FUTIME;
		852	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		853	}
		854
		855	REQ_SEND;
		856	}
		857
		858	void
		859	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		860	PPCODE:
		861	{
		862	dREQ;
		863
		864	req->sv1 = newSVsv (fh_or_path);
		865	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		866
		867	if (SvPOK (req->sv1))
		868	{
		869	req->type = EIO_TRUNCATE;
		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871	}
		872	else
		873	{
		874	req->type = EIO_FTRUNCATE;
		875	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		876	}
		877
		878	REQ_SEND;
		879	}
		880
		881	void
		882	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		883	ALIAS:
		884	aio_chmod = EIO_CHMOD
		885	aio_mkdir = EIO_MKDIR
		886	PPCODE:
		887	{
		888	dREQ;
		889
		890	req->int2 = mode;
		891	req->sv1 = newSVsv (fh_or_path);
		892
		893	if (SvPOK (req->sv1))
		894	{
		895	req->type = ix;
		896	req->ptr1 = SvPVbyte_nolen (req->sv1);
		897	}
		898	else
		899	{
		900	req->type = EIO_FCHMOD;
		901	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		902	}
		903
		904	REQ_SEND;
		905	}
		906
		907	void
		908	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		909	PPCODE:
		910	{
		911	dREQ;
		912
		913	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		914	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		915	req->sv1 = newSVsv (fh_or_path);
		916
		917	if (SvPOK (req->sv1))
		918	{
		919	req->type = EIO_CHOWN;
		920	req->ptr1 = SvPVbyte_nolen (req->sv1);
		921	}
		922	else
		923	{
		924	req->type = EIO_FCHOWN;
		925	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		926	}
		927
		928	REQ_SEND;
		929	}
		930
		931	void
		932	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		933	PPCODE:
		934	{
		935	dREQ;
		936
		937	req->type = EIO_READDIR;
		938	req->sv1 = newSVsv (pathname);
		939	req->ptr1 = SvPVbyte_nolen (req->sv1);
		940	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		941
		942	if (flags & EIO_READDIR_DENTS)
		943	req->int1 |= EIO_READDIR_CUSTOM2;
		944
		945	REQ_SEND;
		946	}
		947
		948	void
1157	aio_unlink (pathname,callback=&PL_sv_undef)	949	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1158	SV * pathname
1159	SV * callback
1160	ALIAS:	950	ALIAS:
1161	aio_unlink = REQ_UNLINK	951	aio_unlink = EIO_UNLINK
1162	aio_rmdir = REQ_RMDIR	952	aio_rmdir = EIO_RMDIR
1163	aio_readdir = REQ_READDIR	953	aio_readdir = EIO_READDIR
1164	PPCODE:	954	PPCODE:
1165	{	955	{
1166	dREQ;	956	dREQ;
1167		957
1168	req->type = ix;	958	req->type = ix;
1169	req->data = newSVsv (pathname);	959	req->sv1 = newSVsv (pathname);
1170	req->dataptr = SvPVbyte_nolen (req->data);	960	req->ptr1 = SvPVbyte_nolen (req->sv1);
		961
		962	REQ_SEND;
		963	}
		964
		965	void
		966	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		967	ALIAS:
		968	aio_link = EIO_LINK
		969	aio_symlink = EIO_SYMLINK
		970	aio_rename = EIO_RENAME
		971	PPCODE:
		972	{
		973	dREQ;
		974
		975	req->type = ix;
		976	req->sv1 = newSVsv (oldpath);
		977	req->ptr1 = SvPVbyte_nolen (req->sv1);
		978	req->sv2 = newSVsv (newpath);
		979	req->ptr2 = SvPVbyte_nolen (req->sv2);
1171		980
1172	REQ_SEND;	981	REQ_SEND;
1173	}	982	}
1174		983
1175	void	984	void
1176	aio_link (oldpath,newpath,callback=&PL_sv_undef)	985	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1177	SV * oldpath
1178	SV * newpath
1179	SV * callback
1180	ALIAS:
1181	aio_link = REQ_LINK
1182	aio_symlink = REQ_SYMLINK
1183	aio_rename = REQ_RENAME
1184	PPCODE:	986	PPCODE:
1185	{	987	{
1186	dREQ;	988	dREQ;
1187		989
1188	req->type = ix;	990	req->type = EIO_MKNOD;
1189	req->fh = newSVsv (oldpath);	991	req->sv1 = newSVsv (pathname);
1190	req->data2ptr = SvPVbyte_nolen (req->fh);	992	req->ptr1 = SvPVbyte_nolen (req->sv1);
1191	req->data = newSVsv (newpath);	993	req->int2 = (mode_t)mode;
1192	req->dataptr = SvPVbyte_nolen (req->data);	994	req->offs = dev;
1193		995
1194	REQ_SEND;	996	REQ_SEND;
1195	}	997	}
1196		998
1197	void	999	void
1198	aio_sleep (delay,callback=&PL_sv_undef)	1000	aio_busy (double delay, SV *callback=&PL_sv_undef)
1199	double delay
1200	SV * callback
1201	PPCODE:	1001	PPCODE:
1202	{	1002	{
1203	dREQ;	1003	dREQ;
1204		1004
1205	req->type = REQ_SLEEP;	1005	req->type = EIO_BUSY;
1206	req->fd = delay < 0. ? 0 : delay;	1006	req->nv1 = delay < 0. ? 0. : delay;
1207	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1208		1007
1209	REQ_SEND;	1008	REQ_SEND;
1210	}	1009	}
1211		1010
1212	void	1011	void
1213	aio_group (callback=&PL_sv_undef)	1012	aio_group (SV *callback=&PL_sv_undef)
1214	SV * callback
1215	PROTOTYPE: ;$	1013	PROTOTYPE: ;$
1216	PPCODE:	1014	PPCODE:
1217	{	1015	{
1218	dREQ;	1016	dREQ;
		1017
1219	req->type = REQ_GROUP;	1018	req->type = EIO_GROUP;
		1019
1220	req_send (req);	1020	req_submit (req);
1221	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1021	XPUSHs (req_sv (req, aio_grp_stash));
1222	}	1022	}
1223		1023
1224	void	1024	void
1225	aio_nop (callback=&PL_sv_undef)	1025	aio_nop (SV *callback=&PL_sv_undef)
1226	SV * callback	1026	ALIAS:
		1027	aio_nop = EIO_NOP
		1028	aio_sync = EIO_SYNC
1227	PPCODE:	1029	PPCODE:
1228	{	1030	{
1229	dREQ;	1031	dREQ;
1230		1032
1231	req->type = REQ_NOP;	1033	req->type = ix;
1232		1034
1233	REQ_SEND;	1035	REQ_SEND;
1234	}	1036	}
		1037
		1038	int
		1039	aioreq_pri (int pri = 0)
		1040	PROTOTYPE: ;$
		1041	CODE:
		1042	RETVAL = next_pri;
		1043	if (items > 0)
		1044	{
		1045	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1046	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1047	next_pri = pri;
		1048	}
		1049	OUTPUT:
		1050	RETVAL
		1051
		1052	void
		1053	aioreq_nice (int nice = 0)
		1054	CODE:
		1055	nice = next_pri - nice;
		1056	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1057	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1058	next_pri = nice;
1235		1059
1236	void	1060	void
1237	flush ()	1061	flush ()
1238	PROTOTYPE:	1062	PROTOTYPE:
1239	CODE:	1063	CODE:
1240	while (nreqs)	1064	while (eio_nreqs ())
1241	{	1065	{
1242	poll_wait ();	1066	poll_wait ();
1243	poll_cb ();	1067	poll_cb ();
1244	}	1068	}
1245		1069
1246	void	1070	int
1247	poll()	1071	poll()
1248	PROTOTYPE:	1072	PROTOTYPE:
1249	CODE:	1073	CODE:
1250	if (nreqs)
1251	{
1252	poll_wait ();	1074	poll_wait ();
1253	poll_cb ();	1075	RETVAL = poll_cb ();
1254	}	1076	OUTPUT:
		1077	RETVAL
1255		1078
1256	int	1079	int
1257	poll_fileno()	1080	poll_fileno()
1258	PROTOTYPE:	1081	PROTOTYPE:
1259	CODE:	1082	CODE:
1260	RETVAL = respipe [0];	1083	RETVAL = s_epipe_fd (&respipe);
1261	OUTPUT:	1084	OUTPUT:
1262	RETVAL	1085	RETVAL
1263		1086
1264	int	1087	int
1265	poll_cb(...)	1088	poll_cb(...)
…		…
1271		1094
1272	void	1095	void
1273	poll_wait()	1096	poll_wait()
1274	PROTOTYPE:	1097	PROTOTYPE:
1275	CODE:	1098	CODE:
1276	if (nreqs)
1277	poll_wait ();	1099	poll_wait ();
1278		1100
1279	int	1101	int
1280	nreqs()	1102	nreqs()
1281	PROTOTYPE:	1103	PROTOTYPE:
1282	CODE:	1104	CODE:
1283	RETVAL = nreqs;	1105	RETVAL = eio_nreqs ();
1284	OUTPUT:	1106	OUTPUT:
1285	RETVAL	1107	RETVAL
1286		1108
		1109	int
		1110	nready()
		1111	PROTOTYPE:
		1112	CODE:
		1113	RETVAL = eio_nready ();
		1114	OUTPUT:
		1115	RETVAL
		1116
		1117	int
		1118	npending()
		1119	PROTOTYPE:
		1120	CODE:
		1121	RETVAL = eio_npending ();
		1122	OUTPUT:
		1123	RETVAL
		1124
		1125	int
		1126	nthreads()
		1127	PROTOTYPE:
		1128	CODE:
		1129	RETVAL = eio_nthreads ();
		1130	OUTPUT:
		1131	RETVAL
		1132
		1133	int
		1134	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1135	PROTOTYPE: $$$$
		1136	CODE:
		1137	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1138	RETVAL = posix_fadvise (fh, offset, length, advice);
		1139	#else
		1140	RETVAL = errno = ENOSYS;
		1141	#endif
		1142	OUTPUT:
		1143	RETVAL
		1144
		1145	ssize_t
		1146	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1147	PROTOTYPE: $$$$
		1148	CODE:
		1149	eio_sendfile_sync (ofh, ifh, offset, count);
		1150
		1151	void _on_next_submit (SV *cb)
		1152	CODE:
		1153	SvREFCNT_dec (on_next_submit);
		1154	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1155
1287	PROTOTYPES: DISABLE	1156	PROTOTYPES: DISABLE
1288		1157
1289	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1158	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1290		1159
1291	void	1160	void
1292	cancel (aio_req_ornot req)	1161	cancel (aio_req_ornot req)
1293	PROTOTYPE:
1294	CODE:	1162	CODE:
1295	req_cancel (req);	1163	eio_cancel (req);
1296		1164
1297	void	1165	void
1298	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1166	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1299	CODE:	1167	PPCODE:
		1168	{
		1169	if (GIMME_V != G_VOID)
		1170	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1171
		1172	if (items > 1)
		1173	{
		1174	SV *cb_cv =get_cb (callback);
		1175
1300	SvREFCNT_dec (req->callback);	1176	SvREFCNT_dec (req->callback);
1301	req->callback = newSVsv (callback);	1177	req->callback = SvREFCNT_inc (cb_cv);
		1178	}
		1179	}
1302		1180
1303	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1181	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1304		1182
1305	void	1183	void
1306	add (aio_req grp, ...)	1184	add (aio_req grp, ...)
1307	PPCODE:	1185	PPCODE:
1308	{	1186	{
1309	int i;	1187	int i;
1310	aio_req req;
1311		1188
1312	if (grp->fd == 2)	1189	if (grp->int1 == 2)
1313	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1190	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1314		1191
1315	for (i = 1; i < items; ++i )	1192	for (i = 1; i < items; ++i )
1316	{	1193	{
		1194	aio_req req;
		1195
1317	if (GIMME_V != G_VOID)	1196	if (GIMME_V != G_VOID)
1318	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1197	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1319		1198
1320	req = SvAIO_REQ (ST (i));	1199	req = SvAIO_REQ (ST (i));
1321		1200
1322	if (req)	1201	if (req)
1323	{	1202	eio_grp_add (grp, req);
1324	++grp->length;
1325	req->grp = grp;
1326
1327	req->grp_prev = 0;
1328	req->grp_next = grp->grp_first;
1329
1330	if (grp->grp_first)
1331	grp->grp_first->grp_prev = req;
1332
1333	grp->grp_first = req;
1334	}	1203	}
1335	}
1336	}	1204	}
		1205
		1206	void
		1207	cancel_subs (aio_req_ornot req)
		1208	CODE:
		1209	req_cancel_subs (req);
1337		1210
1338	void	1211	void
1339	result (aio_req grp, ...)	1212	result (aio_req grp, ...)
1340	CODE:	1213	CODE:
1341	{	1214	{
1342	int i;	1215	int i;
		1216	AV *av;
		1217
		1218	grp->errorno = errno;
		1219
1343	AV *av = newAV ();	1220	av = newAV ();
		1221	av_extend (av, items - 1);
1344		1222
1345	for (i = 1; i < items; ++i )	1223	for (i = 1; i < items; ++i )
1346	av_push (av, newSVsv (ST (i)));	1224	av_push (av, newSVsv (ST (i)));
1347		1225
1348	SvREFCNT_dec (grp->data);	1226	SvREFCNT_dec (grp->sv1);
1349	grp->data = (SV *)av;	1227	grp->sv1 = (SV *)av;
1350	}	1228	}
1351		1229
1352	void	1230	void
		1231	errno (aio_req grp, int errorno = errno)
		1232	CODE:
		1233	grp->errorno = errorno;
		1234
		1235	void
1353	feed_limit (aio_req grp, int limit)	1236	limit (aio_req grp, int limit)
1354	CODE:	1237	CODE:
1355	grp->fd2 = limit;	1238	eio_grp_limit (grp, limit);
1356	aio_grp_feed (grp);
1357		1239
1358	void	1240	void
1359	feed (aio_req grp, SV *callback=&PL_sv_undef)	1241	feed (aio_req grp, SV *callback=&PL_sv_undef)
1360	CODE:	1242	CODE:
1361	{	1243	{
1362	SvREFCNT_dec (grp->fh2);	1244	SvREFCNT_dec (grp->sv2);
1363	grp->fh2 = newSVsv (callback);	1245	grp->sv2 = newSVsv (callback);
		1246	grp->feed = aio_grp_feed;
1364		1247
1365	if (grp->fd2 <= 0)	1248	if (grp->int2 <= 0)
1366	grp->fd2 = 2;	1249	grp->int2 = 2;
1367		1250
1368	aio_grp_feed (grp);	1251	eio_grp_limit (grp, grp->int2);
1369	}	1252	}
1370		1253

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