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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.75 by root, Thu Oct 26 06:44:48 2006 UTC vs.
Revision 1.133 by root, Wed Oct 22 18:15:36 2008 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"
17
18	#include <pthread.h>
19
20	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
21	#include <errno.h>	11	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	12	#include <sys/types.h>
25	#include <sys/stat.h>	13	#include <sys/stat.h>
26	#include <limits.h>	14	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	15	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	16	#include <sched.h>
31		17
32	#if HAVE_SENDFILE	18	/* perl namespace pollution */
33	# if __linux	19	#undef VERSION
34	# include <sys/sendfile.h>	20
35	# elif __freebsd	21	#ifdef _WIN32
36	# include <sys/socket.h>	22
37	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
38	# elif __hpux	24	# undef malloc
39	# include <sys/socket.h>	25	# undef free
40	# elif __solaris /* not yet */	26
41	# 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
42	# else	59	#else
43	# error sendfile support requested but not available	60
44	# 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
45	#endif	68	#endif
46		69
47	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
48	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
49	# 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
50	#endif	83	#endif
51		84
52	#ifndef PTHREAD_STACK_MIN	85	/*****************************************************************************/
53	/* care for broken platforms, e.g. windows */	86
54	# define PTHREAD_STACK_MIN 16384	87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
55	#endif	91	#endif
56		92
57	#if __ia64	93	#define expect_false(expr) expect ((expr) != 0, 0)
58	# define STACKSIZE 65536	94	#define expect_true(expr) expect ((expr) != 0, 1)
59	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
60	# define STACKSIZE PTHREAD_STACK_MIN
61	#else
62	# define STACKSIZE 16384
63	#endif
64		95
65	/* buffer size for various temporary buffers */	96	/*****************************************************************************/
66	#define AIO_BUFSIZE 65536
67		97
68	#define dBUF \	98	static HV *stash;
69	char *aio_buf; \	99	typedef SV SV8; /* byte-sv, used for argument-checking */
70	LOCK (wrklock); \
71	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
72	UNLOCK (wrklock); \
73	if (!aio_buf) \
74	return -1;
75
76	enum {
77	REQ_QUIT,
78	REQ_OPEN, REQ_CLOSE,
79	REQ_READ, REQ_WRITE, REQ_READAHEAD,
80	REQ_SENDFILE,
81	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
82	REQ_FSYNC, REQ_FDATASYNC,
83	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
84	REQ_READDIR,
85	REQ_LINK, REQ_SYMLINK,
86	REQ_GROUP, REQ_NOP,
87	REQ_BUSY,
88	};
89		100
90	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
91	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
92		103
93	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
94	{
95	struct aio_cb *volatile next;
96
97	SV *data, *callback;	105	SV *callback; \
98	SV *fh, *fh2;	106	SV *sv1, *sv2; \
99	void *dataptr, *data2ptr;
100	Stat_t *statdata;
101	off_t offset;
102	size_t length;
103	ssize_t result;
104
105	STRLEN dataoffset;	107	STRLEN stroffset; \
106	int type;	108	SV *self;
107	int fd, fd2;
108	int errorno;
109	mode_t mode; /* open */
110		109
111	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
112	unsigned char pri;
113		111
114	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
115	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
116	} 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)
117		118
118	enum {	119	enum {
119	FLAG_CANCELLED = 0x01,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
120	};	121	};
121		122
		123	#include "libeio/eio.c"
		124
122	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
123	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
124		127
125	enum {	128	static SV *on_next_submit;
126	PRI_MIN = -4,	129	static int next_pri = EIO_PRI_DEFAULT;
127	PRI_MAX = 4,	130	static int max_outstanding;
128		131
129	DEFAULT_PRI = 0,	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
130	PRI_BIAS = -PRI_MIN,
131	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
132	};
133		133
134	static int next_pri = DEFAULT_PRI + PRI_BIAS;
135
136	static int started, wanted;
137	static volatile int nreqs;
138	static int respipe [2];
139
140	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
141	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
142	#else
143	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
144	#endif
145
146	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
147	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
148
149	/* worker threasd management */
150	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
151
152	typedef struct worker {
153	/* locked by wrklock */
154	struct worker *prev, *next;
155
156	pthread_t tid;
157
158	/* locked by reslock, reqlock or wrklock */
159	aio_req req; /* currently processed request */
160	void *dbuf;
161	DIR *dirp;
162	} worker;
163
164	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
165
166	static void worker_clear (worker *wrk)
167	{
168	if (wrk->dirp)
169	{
170	closedir (wrk->dirp);
171	wrk->dirp = 0;
172	}
173
174	if (wrk->dbuf)
175	{
176	free (wrk->dbuf);
177	wrk->dbuf = 0;
178	}
179	}
180
181	static void worker_free (worker *wrk)
182	{
183	wrk->next->prev = wrk->prev;
184	wrk->prev->next = wrk->next;
185
186	free (wrk);
187	}
188
189	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
190	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
191	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
192
193	/*
194	* a somewhat faster data structure might be nice, but
195	* with 8 priorities this actually needs <20 insns
196	* per shift, the most expensive operation.
197	*/
198	typedef struct {
199	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
200	int size;
201	} reqq;
202
203	static reqq req_queue;
204	static reqq res_queue;
205
206	int reqq_push (reqq *q, aio_req req)
207	{
208	int pri = req->pri;
209	req->next = 0;
210
211	if (q->qe[pri])
212	{
213	q->qe[pri]->next = req;
214	q->qe[pri] = req;
215	}
216	else
217	q->qe[pri] = q->qs[pri] = req;
218
219	return q->size++;
220	}
221
222	aio_req reqq_shift (reqq *q)
223	{
224	int pri;
225
226	if (!q->size)
227	return 0;
228
229	--q->size;
230
231	for (pri = NUM_PRI; pri--; )
232	{
233	aio_req req = q->qs[pri];
234
235	if (req)
236	{
237	if (!(q->qs[pri] = req->next))
238	q->qe[pri] = 0;
239
240	return req;
241	}
242	}
243
244	abort ();
245	}
246
247	static int poll_cb ();
248	static void req_invoke (aio_req req);
249	static void req_free (aio_req req);	134	static void req_destroy (aio_req req);
250	static void req_cancel (aio_req req);	135	static void req_cancel (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	}
251		150
252	/* must be called at most once */	151	/* must be called at most once */
253	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
254	{	153	{
255	if (!req->self)	154	if (!req->self)
…		…
273	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
274	}	173	}
275		174
276	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
277	{	176	{
278	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
279	{	178	{
280	int old_len = grp->length;
281
282	if (grp->fh2 && SvOK (grp->fh2))
283	{
284	dSP;	179	dSP;
285		180
286	ENTER;	181	ENTER;
287	SAVETMPS;	182	SAVETMPS;
288	PUSHMARK (SP);	183	PUSHMARK (SP);
289	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
290	PUTBACK;	185	PUTBACK;
291	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
292	SPAGAIN;	187	SPAGAIN;
293	FREETMPS;	188	FREETMPS;
294	LEAVE;	189	LEAVE;
295	}
296
297	/* stop if no progress has been made */
298	if (old_len == grp->length)
299	{
300	SvREFCNT_dec (grp->fh2);
301	grp->fh2 = 0;
302	break;
303	}
304	}	190	}
305	}	191	}
306		192
307	static void aio_grp_dec (aio_req grp)	193	static void req_submit (eio_req *req)
308	{	194	{
309	--grp->length;	195	eio_submit (req);
310		196
311	/* call feeder, if applicable */	197	if (expect_false (on_next_submit))
312	aio_grp_feed (grp);
313
314	/* finish, if done */
315	if (!grp->length && grp->fd)
316	{	198	{
317	req_invoke (grp);	199	dSP;
318	req_free (grp);	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);
319	}	207	}
320	}	208	}
321		209
322	static void poll_wait ()	210	static int req_invoke (eio_req *req)
323	{	211	{
324	fd_set rfd;	212	dSP;
325		213
326	while (nreqs)	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
327	{	218	{
328	int size;
329	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
330	LOCK (reslock);
331	#endif
332	size = res_queue.size;
333	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
334	UNLOCK (reslock);
335	#endif
336
337	if (size)
338	return;
339
340	FD_ZERO(&rfd);
341	FD_SET(respipe [0], &rfd);
342
343	select (respipe [0] + 1, &rfd, 0, 0, 0);
344	}
345	}
346
347	static void req_invoke (aio_req req)
348	{
349	dSP;
350
351	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
352	{
353	errno = req->errorno;
354
355	ENTER;	219	ENTER;
356	SAVETMPS;	220	SAVETMPS;
357	PUSHMARK (SP);	221	PUSHMARK (SP);
358	EXTEND (SP, 1);	222	EXTEND (SP, 1);
359		223
360	switch (req->type)	224	switch (req->type)
361	{	225	{
362	case REQ_READDIR:	226	case EIO_READDIR:
363	{	227	{
364	SV *rv = &PL_sv_undef;	228	SV *rv = &PL_sv_undef;
365		229
366	if (req->result >= 0)	230	if (req->result >= 0)
367	{	231	{
368	int i;	232	int i;
369	char *buf = req->data2ptr;	233	char *buf = req->ptr2;
370	AV *av = newAV ();	234	AV *av = newAV ();
371		235
372	av_extend (av, req->result - 1);	236	av_extend (av, req->result - 1);
373		237
374	for (i = 0; i < req->result; ++i)	238	for (i = 0; i < req->result; ++i)
…		…
384		248
385	PUSHs (rv);	249	PUSHs (rv);
386	}	250	}
387	break;	251	break;
388		252
389	case REQ_OPEN:	253	case EIO_OPEN:
390	{	254	{
391	/* convert fd to fh */	255	/* convert fd to fh */
392	SV *fh;	256	SV *fh = &PL_sv_undef;
393		257
394	PUSHs (sv_2mortal (newSViv (req->result)));	258	if (req->result >= 0)
395	PUTBACK;	259	{
396	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	260	GV *gv = (GV *)sv_newmortal ();
397	SPAGAIN;	261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
398		267
399	fh = SvREFCNT_inc (POPs);	268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
400		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
401	PUSHMARK (SP);	280	PUSHs (fh);
402	XPUSHs (sv_2mortal (fh));
403	}	281	}
404	break;	282	break;
405		283
406	case REQ_GROUP:	284	case EIO_GROUP:
407	req->fd = 2; /* mark group as finished */	285	req->int1 = 2; /* mark group as finished */
408		286
409	if (req->data)	287	if (req->sv1)
410	{	288	{
411	int i;	289	int i;
412	AV *av = (AV *)req->data;	290	AV *av = (AV *)req->sv1;
413		291
414	EXTEND (SP, AvFILL (av) + 1);	292	EXTEND (SP, AvFILL (av) + 1);
415	for (i = 0; i <= AvFILL (av); ++i)	293	for (i = 0; i <= AvFILL (av); ++i)
416	PUSHs (*av_fetch (av, i, 0));	294	PUSHs (*av_fetch (av, i, 0));
417	}	295	}
418	break;	296	break;
419		297
420	case REQ_NOP:	298	case EIO_NOP:
421	case REQ_BUSY:	299	case EIO_BUSY:
422	break;	300	break;
		301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		318	*SvEND (req->sv2) = 0;
		319	PUSHs (sv_2mortal (newSViv (req->result)));
		320	break;
		321
		322	case EIO_DUP2:
		323	if (req->result > 0)
		324	req->result = 0;
		325	/* FALLTHROUGH */
423		326
424	default:	327	default:
425	PUSHs (sv_2mortal (newSViv (req->result)));	328	PUSHs (sv_2mortal (newSViv (req->result)));
426	break;	329	break;
427	}	330	}
428		331
		332	errno = req->errorno;
429		333
430	PUTBACK;	334	PUTBACK;
431	call_sv (req->callback, G_VOID | G_EVAL);	335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
432	SPAGAIN;	336	SPAGAIN;
433		337
434	FREETMPS;	338	FREETMPS;
435	LEAVE;	339	LEAVE;
		340
		341	PUTBACK;
436	}	342	}
437		343
438	if (req->grp)	344	return !!SvTRUE (ERRSV);
439	{
440	aio_req grp = req->grp;
441
442	/* unlink request */
443	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
444	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
445
446	if (grp->grp_first == req)
447	grp->grp_first = req->grp_next;
448
449	aio_grp_dec (grp);
450	}
451
452	if (SvTRUE (ERRSV))
453	{
454	req_free (req);
455	croak (0);
456	}
457	}	345	}
458		346
459	static void req_free (aio_req req)	347	static void req_destroy (aio_req req)
460	{	348	{
461	if (req->self)	349	if (req->self)
462	{	350	{
463	sv_unmagic (req->self, PERL_MAGIC_ext);	351	sv_unmagic (req->self, PERL_MAGIC_ext);
464	SvREFCNT_dec (req->self);	352	SvREFCNT_dec (req->self);
465	}	353	}
466		354
467	SvREFCNT_dec (req->data);
468	SvREFCNT_dec (req->fh);	355	SvREFCNT_dec (req->sv1);
469	SvREFCNT_dec (req->fh2);	356	SvREFCNT_dec (req->sv2);
470	SvREFCNT_dec (req->callback);	357	SvREFCNT_dec (req->callback);
471	Safefree (req->statdata);
472
473	if (req->type == REQ_READDIR)
474	free (req->data2ptr);
475		358
476	Safefree (req);	359	Safefree (req);
477	}	360	}
478		361
479	static void req_cancel_subs (aio_req grp)	362	static void req_cancel_subs (aio_req grp)
480	{	363	{
481	aio_req sub;	364	aio_req sub;
482		365
483	if (grp->type != REQ_GROUP)	366	if (grp->type != EIO_GROUP)
484	return;	367	return;
485		368
486	SvREFCNT_dec (grp->fh2);	369	SvREFCNT_dec (grp->sv2);
487	grp->fh2 = 0;	370	grp->sv2 = 0;
488		371
489	for (sub = grp->grp_first; sub; sub = sub->grp_next)	372	eio_grp_cancel (grp);
490	req_cancel (sub);
491	}	373	}
492		374
493	static void req_cancel (aio_req req)	375	#ifdef USE_SOCKETS_AS_HANDLES
494	{	376	# define TO_SOCKET(x) (win32_get_osfhandle (x))
495	req->flags |= FLAG_CANCELLED;	377	#else
		378	# define TO_SOCKET(x) (x)
		379	#endif
496		380
497	req_cancel_subs (req);	381	static void
498	}	382	create_respipe (void)
		383	{
		384	int old_readfd = respipe [0];
499		385
		386	if (respipe [1] >= 0)
		387	respipe_close (TO_SOCKET (respipe [1]));
		388
		389	#ifdef _WIN32
		390	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		391	#else
		392	if (pipe (respipe))
		393	#endif
		394	croak ("unable to initialize result pipe");
		395
		396	if (old_readfd >= 0)
		397	{
		398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		399	croak ("unable to initialize result pipe(2)");
		400
		401	respipe_close (respipe [0]);
		402	respipe [0] = old_readfd;
		403	}
		404
		405	#ifdef _WIN32
		406	int arg = 1;
		407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		409	#else
		410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
		414
		415	respipe_osf [0] = TO_SOCKET (respipe [0]);
		416	respipe_osf [1] = TO_SOCKET (respipe [1]);
		417	}
		418
		419	static void poll_wait (void)
		420	{
		421	fd_set rfd;
		422
		423	while (eio_nreqs ())
		424	{
		425	int size;
		426
		427	X_LOCK (reslock);
		428	size = res_queue.size;
		429	X_UNLOCK (reslock);
		430
		431	if (size)
		432	return;
		433
		434	etp_maybe_start_thread ();
		435
		436	FD_ZERO (&rfd);
		437	FD_SET (respipe [0], &rfd);
		438
		439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		440	}
		441	}
		442
500	static int poll_cb ()	443	static int poll_cb (void)
501	{	444	{
502	dSP;
503	int count = 0;
504	int do_croak = 0;
505	aio_req req;
506
507	for (;;)	445	for (;;)
508	{	446	{
509	LOCK (reslock);	447	int res = eio_poll ();
510	req = reqq_shift (&res_queue);
511		448
512	if (req)	449	if (res > 0)
513	{
514	if (!res_queue.size)
515	{
516	/* read any signals sent by the worker threads */
517	char buf [32];
518	while (read (respipe [0], buf, 32) == 32)
519	;
520	}
521	}
522
523	UNLOCK (reslock);
524
525	if (!req)
526	break;	450	croak (0);
527		451
528	--nreqs;	452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
529		454
530	if (req->type == REQ_QUIT)	455	poll_wait ();
531	started--;
532	else if (req->type == REQ_GROUP && req->length)
533	{
534	req->fd = 1; /* mark request as delayed */
535	continue;
536	}
537	else
538	{
539	if (req->type == REQ_READ)
540	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
541
542	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
543	SvREADONLY_off (req->data);
544
545	if (req->statdata)
546	{
547	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
548	PL_laststatval = req->result;
549	PL_statcache = *(req->statdata);
550	}
551
552	req_invoke (req);
553
554	count++;
555	}
556
557	req_free (req);
558	}	456	}
559
560	return count;
561	}	457	}
562		458
563	static void *aio_proc(void *arg);
564
565	static void start_thread (void)	459	static void atfork_child (void)
566	{	460	{
567	sigset_t fullsigset, oldsigset;	461	create_respipe ();
568	pthread_attr_t attr;
569
570	worker *wrk = calloc (1, sizeof (worker));
571
572	if (!wrk)
573	croak ("unable to allocate worker thread data");
574
575	pthread_attr_init (&attr);
576	pthread_attr_setstacksize (&attr, STACKSIZE);
577	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
578
579	sigfillset (&fullsigset);
580
581	LOCK (wrklock);
582	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
583
584	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
585	{
586	wrk->prev = &wrk_first;
587	wrk->next = wrk_first.next;
588	wrk_first.next->prev = wrk;
589	wrk_first.next = wrk;
590	started++;
591	}
592	else
593	free (wrk);
594
595	sigprocmask (SIG_SETMASK, &oldsigset, 0);
596	UNLOCK (wrklock);
597	}	462	}
598		463
599	static void req_send (aio_req req)	464	static SV *
		465	get_cb (SV *cb_sv)
600	{	466	{
601	while (started < wanted && nreqs >= started)	467	HV *st;
602	start_thread ();	468	GV *gvp;
		469	CV *cv;
603		470
604	++nreqs;	471	if (!SvOK (cb_sv))
605
606	LOCK (reqlock);
607	reqq_push (&req_queue, req);
608	pthread_cond_signal (&reqwait);
609	UNLOCK (reqlock);
610	}
611
612	static void end_thread (void)
613	{
614	aio_req req;
615
616	Newz (0, req, 1, aio_cb);
617
618	req->type = REQ_QUIT;
619	req->pri = PRI_MAX + PRI_BIAS;
620
621	req_send (req);
622	}
623
624	static void min_parallel (int nthreads)
625	{
626	if (wanted < nthreads)
627	wanted = nthreads;
628	}
629
630	static void max_parallel (int nthreads)
631	{
632	int cur = started;
633
634	if (wanted > nthreads)
635	wanted = nthreads;
636
637	while (cur > wanted)
638	{
639	end_thread ();
640	cur--;
641	}
642
643	while (started > wanted)
644	{
645	poll_wait ();
646	poll_cb ();
647	}
648	}
649
650	static void create_pipe ()
651	{
652	if (pipe (respipe))
653	croak ("unable to initialize result pipe");
654
655	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
656	croak ("cannot set result pipe to nonblocking mode");
657
658	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
659	croak ("cannot set result pipe to nonblocking mode");
660	}
661
662	/*****************************************************************************/
663	/* work around various missing functions */
664
665	#if !HAVE_PREADWRITE
666	# define pread aio_pread
667	# define pwrite aio_pwrite
668
669	/*
670	* make our pread/pwrite safe against themselves, but not against
671	* normal read/write by using a mutex. slows down execution a lot,
672	* but that's your problem, not mine.
673	*/
674	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
675
676	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
677	{
678	ssize_t res;
679	off_t ooffset;
680
681	LOCK (preadwritelock);
682	ooffset = lseek (fd, 0, SEEK_CUR);
683	lseek (fd, offset, SEEK_SET);
684	res = read (fd, buf, count);
685	lseek (fd, ooffset, SEEK_SET);
686	UNLOCK (preadwritelock);
687
688	return res;
689	}
690
691	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
692	{
693	ssize_t res;
694	off_t ooffset;
695
696	LOCK (preadwritelock);
697	ooffset = lseek (fd, 0, SEEK_CUR);
698	lseek (fd, offset, SEEK_SET);
699	res = write (fd, buf, count);
700	lseek (fd, offset, SEEK_SET);
701	UNLOCK (preadwritelock);
702
703	return res;
704	}
705	#endif
706
707	#if !HAVE_FDATASYNC
708	# define fdatasync fsync
709	#endif
710
711	#if !HAVE_READAHEAD
712	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
713
714	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
715	{
716	dBUF;
717
718	while (count > 0)
719	{
720	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
721
722	pread (fd, aio_buf, len, offset);
723	offset += len;
724	count -= len;
725	}
726
727	errno = 0;
728	}
729
730	#endif
731
732	#if !HAVE_READDIR_R
733	# define readdir_r aio_readdir_r
734
735	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
736
737	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
738	{
739	struct dirent *e;
740	int errorno;
741
742	LOCK (readdirlock);
743
744	e = readdir (dirp);
745	errorno = errno;
746
747	if (e)
748	{
749	*res = ent;
750	strcpy (ent->d_name, e->d_name);
751	}
752	else
753	*res = 0;
754
755	UNLOCK (readdirlock);
756
757	errno = errorno;
758	return e ? 0 : -1;
759	}
760	#endif
761
762	/* sendfile always needs emulation */
763	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
764	{
765	ssize_t res;
766
767	if (!count)
768	return 0;	472	return 0;
769		473
770	#if HAVE_SENDFILE	474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
771	# if __linux
772	res = sendfile (ofd, ifd, &offset, count);
773		475
774	# elif __freebsd	476	if (!cv)
775	/*	477	croak ("IO::AIO callback must be undef or a CODE reference");
776	* Of course, the freebsd sendfile is a dire hack with no thoughts
777	* wasted on making it similar to other I/O functions.
778	*/
779	{
780	off_t sbytes;
781	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
782		478
783	if (res < 0 && sbytes)	479	return (SV *)cv;
784	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
785	res = sbytes;
786	}
787
788	# elif __hpux
789	res = sendfile (ofd, ifd, offset, count, 0, 0);
790
791	# elif __solaris
792	{
793	struct sendfilevec vec;
794	size_t sbytes;
795
796	vec.sfv_fd = ifd;
797	vec.sfv_flag = 0;
798	vec.sfv_off = offset;
799	vec.sfv_len = count;
800
801	res = sendfilev (ofd, &vec, 1, &sbytes);
802
803	if (res < 0 && sbytes)
804	res = sbytes;
805	}
806
807	# endif
808	#else
809	res = -1;
810	errno = ENOSYS;
811	#endif
812
813	if (res < 0
814	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
815	#if __solaris
816	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
817	#endif
818	)
819	)
820	{
821	/* emulate sendfile. this is a major pain in the ass */
822	dBUF;
823
824	res = 0;
825
826	while (count)
827	{
828	ssize_t cnt;
829
830	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
831
832	if (cnt <= 0)
833	{
834	if (cnt && !res) res = -1;
835	break;
836	}
837
838	cnt = write (ofd, aio_buf, cnt);
839
840	if (cnt <= 0)
841	{
842	if (cnt && !res) res = -1;
843	break;
844	}
845
846	offset += cnt;
847	res += cnt;
848	count -= cnt;
849	}
850	}
851
852	return res;
853	}
854
855	/* read a full directory */
856	static void scandir_ (aio_req req, worker *self)
857	{
858	DIR *dirp;
859	union
860	{
861	struct dirent d;
862	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
863	} *u;
864	struct dirent *entp;
865	char *name, *names;
866	int memlen = 4096;
867	int memofs = 0;
868	int res = 0;
869	int errorno;
870
871	LOCK (wrklock);
872	self->dirp = dirp = opendir (req->dataptr);
873	self->dbuf = u = malloc (sizeof (*u));
874	UNLOCK (wrklock);
875
876	req->data2ptr = names = malloc (memlen);
877
878	if (dirp && u && names)
879	for (;;)
880	{
881	errno = 0;
882	readdir_r (dirp, &u->d, &entp);
883
884	if (!entp)
885	break;
886
887	name = entp->d_name;
888
889	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
890	{
891	int len = strlen (name) + 1;
892
893	res++;
894
895	while (memofs + len > memlen)
896	{
897	memlen *= 2;
898	LOCK (wrklock);
899	req->data2ptr = names = realloc (names, memlen);
900	UNLOCK (wrklock);
901
902	if (!names)
903	break;
904	}
905
906	memcpy (names + memofs, name, len);
907	memofs += len;
908	}
909	}
910
911	if (errno)
912	res = -1;
913
914	req->result = res;
915	}
916
917	/*****************************************************************************/
918
919	static void *aio_proc (void *thr_arg)
920	{
921	aio_req req;
922	int type;
923	worker *self = (worker *)thr_arg;
924
925	do
926	{
927	LOCK (reqlock);
928
929	for (;;)
930	{
931	self->req = req = reqq_shift (&req_queue);
932
933	if (req)
934	break;
935
936	pthread_cond_wait (&reqwait, &reqlock);
937	}
938
939	UNLOCK (reqlock);
940
941	errno = 0; /* strictly unnecessary */
942	type = req->type; /* remember type for QUIT check */
943
944	if (!(req->flags & FLAG_CANCELLED))
945	switch (type)
946	{
947	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
949
950	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
952
953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
956
957	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
958	case REQ_CLOSE: req->result = close (req->fd); break;
959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
960	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
961	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
964
965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
966	case REQ_FSYNC: req->result = fsync (req->fd); break;
967	case REQ_READDIR: scandir_ (req, self); break;
968
969	case REQ_BUSY:
970	{
971	struct timeval tv;
972
973	tv.tv_sec = req->fd;
974	tv.tv_usec = req->fd2;
975
976	req->result = select (0, 0, 0, 0, &tv);
977	}
978
979	case REQ_GROUP:
980	case REQ_NOP:
981	case REQ_QUIT:
982	break;
983
984	default:
985	req->result = ENOSYS;
986	break;
987	}
988
989	req->errorno = errno;
990
991	LOCK (reslock);
992
993	if (!reqq_push (&res_queue, req))
994	/* write a dummy byte to the pipe so fh becomes ready */
995	write (respipe [1], &respipe, 1);
996
997	self->req = 0;
998	worker_clear (self);
999
1000	UNLOCK (reslock);
1001	}
1002	while (type != REQ_QUIT);
1003
1004	LOCK (wrklock);
1005	worker_free (self);
1006	UNLOCK (wrklock);
1007
1008	return 0;
1009	}
1010
1011	/*****************************************************************************/
1012
1013	static void atfork_prepare (void)
1014	{
1015	LOCK (wrklock);
1016	LOCK (reqlock);
1017	LOCK (reslock);
1018	#if !HAVE_PREADWRITE
1019	LOCK (preadwritelock);
1020	#endif
1021	#if !HAVE_READDIR_R
1022	LOCK (readdirlock);
1023	#endif
1024	}
1025
1026	static void atfork_parent (void)
1027	{
1028	#if !HAVE_READDIR_R
1029	UNLOCK (readdirlock);
1030	#endif
1031	#if !HAVE_PREADWRITE
1032	UNLOCK (preadwritelock);
1033	#endif
1034	UNLOCK (reslock);
1035	UNLOCK (reqlock);
1036	UNLOCK (wrklock);
1037	}
1038
1039	static void atfork_child (void)
1040	{
1041	aio_req prv;
1042
1043	while (prv = reqq_shift (&req_queue))
1044	req_free (prv);
1045
1046	while (prv = reqq_shift (&res_queue))
1047	req_free (prv);
1048
1049	while (wrk_first.next != &wrk_first)
1050	{
1051	worker *wrk = wrk_first.next;
1052
1053	if (wrk->req)
1054	req_free (wrk->req);
1055
1056	worker_clear (wrk);
1057	worker_free (wrk);
1058	}
1059
1060	started = 0;
1061	nreqs = 0;
1062
1063	close (respipe [0]);
1064	close (respipe [1]);
1065	create_pipe ();
1066
1067	atfork_parent ();
1068	}	480	}
1069		481
1070	#define dREQ \	482	#define dREQ \
		483	SV *cb_cv; \
1071	aio_req req; \	484	aio_req req; \
1072	int req_pri = next_pri; \	485	int req_pri = next_pri; \
1073	next_pri = DEFAULT_PRI + PRI_BIAS; \	486	next_pri = EIO_PRI_DEFAULT; \
1074	\	487	\
1075	if (SvOK (callback) && !SvROK (callback)) \	488	cb_cv = get_cb (callback); \
1076	croak ("callback must be undef or of reference type"); \
1077	\	489	\
1078	Newz (0, req, 1, aio_cb); \	490	Newz (0, req, 1, eio_req); \
1079	if (!req) \	491	if (!req) \
1080	croak ("out of memory during aio_req allocation"); \	492	croak ("out of memory during eio_req allocation"); \
1081	\	493	\
1082	req->callback = newSVsv (callback); \	494	req->callback = SvREFCNT_inc (cb_cv); \
1083	req->pri = req_pri	495	req->pri = req_pri
1084		496
1085	#define REQ_SEND \	497	#define REQ_SEND \
		498	PUTBACK; \
1086	req_send (req); \	499	req_submit (req); \
		500	SPAGAIN; \
1087	\	501	\
1088	if (GIMME_V != G_VOID) \	502	if (GIMME_V != G_VOID) \
1089	XPUSHs (req_sv (req, AIO_REQ_KLASS));	503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1090		504
1091	MODULE = IO::AIO PACKAGE = IO::AIO	505	MODULE = IO::AIO PACKAGE = IO::AIO
1092		506
1093	PROTOTYPES: ENABLE	507	PROTOTYPES: ENABLE
1094		508
1095	BOOT:	509	BOOT:
1096	{	510	{
1097	HV *stash = gv_stashpv ("IO::AIO", 1);	511	stash = gv_stashpv ("IO::AIO", 1);
		512
1098	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	513	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1099	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	514	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1100	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	515	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		516	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		517	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		518	#ifndef _WIN32
		519	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		520	#endif
		521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		522	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		523	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		524	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
1101		525
1102	create_pipe ();	526	create_respipe ();
1103	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1104	}
1105		527
		528	if (eio_init (want_poll, done_poll) < 0)
		529	croak ("IO::AIO: unable to initialise eio library");
		530
		531	/* atfork child called in fifo order, so before eio's handler */
		532	X_THREAD_ATFORK (0, 0, atfork_child);
		533	}
		534
1106	void	535	void
1107	min_parallel (nthreads)	536	max_poll_reqs (int nreqs)
1108	int nthreads
1109	PROTOTYPE: $	537	PROTOTYPE: $
		538	CODE:
		539	eio_set_max_poll_reqs (nreqs);
1110		540
1111	void	541	void
1112	max_parallel (nthreads)	542	max_poll_time (double nseconds)
1113	int nthreads
1114	PROTOTYPE: $	543	PROTOTYPE: $
		544	CODE:
		545	eio_set_max_poll_time (nseconds);
1115		546
1116	void	547	void
		548	min_parallel (int nthreads)
		549	PROTOTYPE: $
		550	CODE:
		551	eio_set_min_parallel (nthreads);
		552
		553	void
		554	max_parallel (int nthreads)
		555	PROTOTYPE: $
		556	CODE:
		557	eio_set_max_parallel (nthreads);
		558
		559	void
		560	max_idle (int nthreads)
		561	PROTOTYPE: $
		562	CODE:
		563	eio_set_max_idle (nthreads);
		564
		565	void
		566	max_outstanding (int maxreqs)
		567	PROTOTYPE: $
		568	CODE:
		569	max_outstanding = maxreqs;
		570
		571	void
1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	572	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1118	SV * pathname
1119	int flags
1120	int mode
1121	SV * callback
1122	PROTOTYPE: $$$;$	573	PROTOTYPE: $$$;$
1123	PPCODE:	574	PPCODE:
1124	{	575	{
1125	dREQ;	576	dREQ;
1126		577
1127	req->type = REQ_OPEN;	578	req->type = EIO_OPEN;
1128	req->data = newSVsv (pathname);	579	req->sv1 = newSVsv (pathname);
1129	req->dataptr = SvPVbyte_nolen (req->data);	580	req->ptr1 = SvPVbyte_nolen (req->sv1);
1130	req->fd = flags;	581	req->int1 = flags;
1131	req->mode = mode;	582	req->int2 = mode;
1132		583
1133	REQ_SEND;	584	REQ_SEND;
1134	}	585	}
1135		586
1136	void	587	void
1137	aio_close (fh,callback=&PL_sv_undef)	588	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	SV * callback
1140	PROTOTYPE: $;$	589	PROTOTYPE: $;$
1141	ALIAS:	590	ALIAS:
1142	aio_close = REQ_CLOSE
1143	aio_fsync = REQ_FSYNC	591	aio_fsync = EIO_FSYNC
1144	aio_fdatasync = REQ_FDATASYNC	592	aio_fdatasync = EIO_FDATASYNC
1145	PPCODE:	593	PPCODE:
1146	{	594	{
1147	dREQ;	595	dREQ;
1148		596
1149	req->type = ix;	597	req->type = ix;
1150	req->fh = newSVsv (fh);	598	req->sv1 = newSVsv (fh);
1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	599	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1152		600
1153	REQ_SEND (req);	601	REQ_SEND (req);
1154	}	602	}
1155		603
1156	void	604	void
		605	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		606	PROTOTYPE: $$$$;$
		607	PPCODE:
		608	{
		609	dREQ;
		610
		611	req->type = EIO_SYNC_FILE_RANGE;
		612	req->sv1 = newSVsv (fh);
		613	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		614	req->offs = SvVAL64 (offset);
		615	req->size = SvVAL64 (nbytes);
		616	req->int2 = flags;
		617
		618	REQ_SEND (req);
		619	}
		620
		621	void
		622	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		623	PROTOTYPE: $;$
		624	PPCODE:
		625	{
		626	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		627	dREQ;
		628
		629	if (close_pipe < 0)
		630	{
		631	int pipefd [2];
		632
		633	if (pipe (pipefd) < 0
		634	|| close (pipefd [1]) < 0
		635	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		636	abort (); /*D*/
		637
		638	close_pipe = pipefd [0];
		639	}
		640
		641	req->type = EIO_DUP2;
		642	req->int1 = close_pipe;
		643	req->sv2 = newSVsv (fh);
		644	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		645
		646	REQ_SEND (req);
		647	}
		648
		649	void
1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	650	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1158	SV * fh
1159	UV offset
1160	UV length
1161	SV * data
1162	UV dataoffset
1163	SV * callback
1164	ALIAS:	651	ALIAS:
1165	aio_read = REQ_READ	652	aio_read = EIO_READ
1166	aio_write = REQ_WRITE	653	aio_write = EIO_WRITE
1167	PROTOTYPE: $$$$$;$	654	PROTOTYPE: $$$$$;$
1168	PPCODE:	655	PPCODE:
1169	{	656	{
1170	aio_req req;
1171	STRLEN svlen;	657	STRLEN svlen;
1172	char *svptr = SvPVbyte (data, svlen);	658	char *svptr = SvPVbyte (data, svlen);
		659	UV len = SvUV (length);
1173		660
1174	SvUPGRADE (data, SVt_PV);	661	SvUPGRADE (data, SVt_PV);
1175	SvPOK_on (data);	662	SvPOK_on (data);
1176		663
1177	if (dataoffset < 0)	664	if (dataoffset < 0)
1178	dataoffset += svlen;	665	dataoffset += svlen;
1179		666
1180	if (dataoffset < 0 || dataoffset > svlen)	667	if (dataoffset < 0 || dataoffset > svlen)
1181	croak ("data offset outside of string");	668	croak ("dataoffset outside of data scalar");
1182		669
1183	if (ix == REQ_WRITE)	670	if (ix == EIO_WRITE)
1184	{	671	{
1185	/* write: check length and adjust. */	672	/* write: check length and adjust. */
1186	if (length < 0 || length + dataoffset > svlen)	673	if (!SvOK (length) || len + dataoffset > svlen)
1187	length = svlen - dataoffset;	674	len = svlen - dataoffset;
1188	}	675	}
1189	else	676	else
1190	{	677	{
1191	/* read: grow scalar as necessary */	678	/* read: grow scalar as necessary */
1192	svptr = SvGROW (data, length + dataoffset);	679	svptr = SvGROW (data, len + dataoffset + 1);
1193	}	680	}
1194		681
1195	if (length < 0)	682	if (len < 0)
1196	croak ("length must not be negative");	683	croak ("length must not be negative");
1197		684
1198	{	685	{
1199	dREQ;	686	dREQ;
1200		687
1201	req->type = ix;	688	req->type = ix;
1202	req->fh = newSVsv (fh);	689	req->sv1 = newSVsv (fh);
1203	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	690	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1204	: IoOFP (sv_2io (fh)));	691	: IoOFP (sv_2io (fh)));
		692	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1205	req->offset = offset;	693	req->size = len;
1206	req->length = length;
1207	req->data = SvREFCNT_inc (data);	694	req->sv2 = SvREFCNT_inc (data);
1208	req->dataptr = (char *)svptr + dataoffset;	695	req->ptr2 = (char *)svptr + dataoffset;
		696	req->stroffset = dataoffset;
1209		697
1210	if (!SvREADONLY (data))	698	if (!SvREADONLY (data))
1211	{	699	{
1212	SvREADONLY_on (data);	700	SvREADONLY_on (data);
1213	req->data2ptr = (void *)data;	701	req->flags |= FLAG_SV2_RO_OFF;
1214	}	702	}
1215		703
1216	REQ_SEND;	704	REQ_SEND;
1217	}	705	}
1218	}	706	}
1219		707
1220	void	708	void
		709	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		710	PROTOTYPE: $$;$
		711	PPCODE:
		712	{
		713	SV *data;
		714	dREQ;
		715
		716	req->type = EIO_READLINK;
		717	req->sv1 = newSVsv (path);
		718	req->ptr1 = SvPVbyte_nolen (req->sv1);
		719
		720	REQ_SEND;
		721	}
		722
		723	void
1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	724	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1222	SV * out_fh
1223	SV * in_fh
1224	UV in_offset
1225	UV length
1226	SV * callback
1227	PROTOTYPE: $$$$;$	725	PROTOTYPE: $$$$;$
1228	PPCODE:	726	PPCODE:
1229	{	727	{
1230	dREQ;	728	dREQ;
1231		729
1232	req->type = REQ_SENDFILE;	730	req->type = EIO_SENDFILE;
1233	req->fh = newSVsv (out_fh);	731	req->sv1 = newSVsv (out_fh);
1234	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	732	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1235	req->fh2 = newSVsv (in_fh);	733	req->sv2 = newSVsv (in_fh);
1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	734	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1237	req->offset = in_offset;	735	req->offs = SvVAL64 (in_offset);
1238	req->length = length;	736	req->size = length;
1239		737
1240	REQ_SEND;	738	REQ_SEND;
1241	}	739	}
1242		740
1243	void	741	void
1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	742	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1245	SV * fh
1246	UV offset
1247	IV length
1248	SV * callback
1249	PROTOTYPE: $$$;$	743	PROTOTYPE: $$$;$
1250	PPCODE:	744	PPCODE:
1251	{	745	{
1252	dREQ;	746	dREQ;
1253		747
1254	req->type = REQ_READAHEAD;	748	req->type = EIO_READAHEAD;
1255	req->fh = newSVsv (fh);	749	req->sv1 = newSVsv (fh);
1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	750	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1257	req->offset = offset;	751	req->offs = SvVAL64 (offset);
1258	req->length = length;	752	req->size = length;
1259		753
1260	REQ_SEND;	754	REQ_SEND;
1261	}	755	}
1262		756
1263	void	757	void
1264	aio_stat (fh_or_path,callback=&PL_sv_undef)	758	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1265	SV * fh_or_path
1266	SV * callback
1267	ALIAS:	759	ALIAS:
1268	aio_stat = REQ_STAT	760	aio_stat = EIO_STAT
1269	aio_lstat = REQ_LSTAT	761	aio_lstat = EIO_LSTAT
1270	PPCODE:	762	PPCODE:
1271	{	763	{
1272	dREQ;	764	dREQ;
1273		765
1274	New (0, req->statdata, 1, Stat_t);	766	req->sv1 = newSVsv (fh_or_path);
1275	if (!req->statdata)
1276	{
1277	req_free (req);
1278	croak ("out of memory during aio_req->statdata allocation");
1279	}
1280		767
1281	if (SvPOK (fh_or_path))	768	if (SvPOK (req->sv1))
1282	{	769	{
1283	req->type = ix;	770	req->type = ix;
1284	req->data = newSVsv (fh_or_path);
1285	req->dataptr = SvPVbyte_nolen (req->data);	771	req->ptr1 = SvPVbyte_nolen (req->sv1);
1286	}	772	}
1287	else	773	else
1288	{	774	{
1289	req->type = REQ_FSTAT;	775	req->type = EIO_FSTAT;
1290	req->fh = newSVsv (fh_or_path);
1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	776	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1292	}	777	}
1293		778
1294	REQ_SEND;	779	REQ_SEND;
1295	}	780	}
1296		781
1297	void	782	void
		783	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		784	PPCODE:
		785	{
		786	dREQ;
		787
		788	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		789	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		790	req->sv1 = newSVsv (fh_or_path);
		791
		792	if (SvPOK (req->sv1))
		793	{
		794	req->type = EIO_UTIME;
		795	req->ptr1 = SvPVbyte_nolen (req->sv1);
		796	}
		797	else
		798	{
		799	req->type = EIO_FUTIME;
		800	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		801	}
		802
		803	REQ_SEND;
		804	}
		805
		806	void
		807	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		808	PPCODE:
		809	{
		810	dREQ;
		811
		812	req->sv1 = newSVsv (fh_or_path);
		813	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		814
		815	if (SvPOK (req->sv1))
		816	{
		817	req->type = EIO_TRUNCATE;
		818	req->ptr1 = SvPVbyte_nolen (req->sv1);
		819	}
		820	else
		821	{
		822	req->type = EIO_FTRUNCATE;
		823	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		824	}
		825
		826	REQ_SEND;
		827	}
		828
		829	void
		830	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		831	ALIAS:
		832	aio_chmod = EIO_CHMOD
		833	aio_mkdir = EIO_MKDIR
		834	PPCODE:
		835	{
		836	dREQ;
		837
		838	req->int2 = mode;
		839	req->sv1 = newSVsv (fh_or_path);
		840
		841	if (SvPOK (req->sv1))
		842	{
		843	req->type = ix;
		844	req->ptr1 = SvPVbyte_nolen (req->sv1);
		845	}
		846	else
		847	{
		848	req->type = EIO_FCHMOD;
		849	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		850	}
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		857	PPCODE:
		858	{
		859	dREQ;
		860
		861	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		862	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		863	req->sv1 = newSVsv (fh_or_path);
		864
		865	if (SvPOK (req->sv1))
		866	{
		867	req->type = EIO_CHOWN;
		868	req->ptr1 = SvPVbyte_nolen (req->sv1);
		869	}
		870	else
		871	{
		872	req->type = EIO_FCHOWN;
		873	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		874	}
		875
		876	REQ_SEND;
		877	}
		878
		879	void
1298	aio_unlink (pathname,callback=&PL_sv_undef)	880	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1299	SV * pathname
1300	SV * callback
1301	ALIAS:	881	ALIAS:
1302	aio_unlink = REQ_UNLINK	882	aio_unlink = EIO_UNLINK
1303	aio_rmdir = REQ_RMDIR	883	aio_rmdir = EIO_RMDIR
1304	aio_readdir = REQ_READDIR	884	aio_readdir = EIO_READDIR
1305	PPCODE:	885	PPCODE:
1306	{	886	{
1307	dREQ;	887	dREQ;
1308		888
1309	req->type = ix;	889	req->type = ix;
1310	req->data = newSVsv (pathname);	890	req->sv1 = newSVsv (pathname);
1311	req->dataptr = SvPVbyte_nolen (req->data);	891	req->ptr1 = SvPVbyte_nolen (req->sv1);
		892
		893	REQ_SEND;
		894	}
		895
		896	void
		897	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		898	ALIAS:
		899	aio_link = EIO_LINK
		900	aio_symlink = EIO_SYMLINK
		901	aio_rename = EIO_RENAME
		902	PPCODE:
		903	{
		904	dREQ;
		905
		906	req->type = ix;
		907	req->sv1 = newSVsv (oldpath);
		908	req->ptr1 = SvPVbyte_nolen (req->sv1);
		909	req->sv2 = newSVsv (newpath);
		910	req->ptr2 = SvPVbyte_nolen (req->sv2);
1312		911
1313	REQ_SEND;	912	REQ_SEND;
1314	}	913	}
1315		914
1316	void	915	void
1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)	916	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1318	SV * oldpath
1319	SV * newpath
1320	SV * callback
1321	ALIAS:
1322	aio_link = REQ_LINK
1323	aio_symlink = REQ_SYMLINK
1324	aio_rename = REQ_RENAME
1325	PPCODE:	917	PPCODE:
1326	{	918	{
1327	dREQ;	919	dREQ;
1328		920
1329	req->type = ix;	921	req->type = EIO_MKNOD;
1330	req->fh = newSVsv (oldpath);	922	req->sv1 = newSVsv (pathname);
1331	req->data2ptr = SvPVbyte_nolen (req->fh);	923	req->ptr1 = SvPVbyte_nolen (req->sv1);
1332	req->data = newSVsv (newpath);	924	req->int2 = (mode_t)mode;
1333	req->dataptr = SvPVbyte_nolen (req->data);	925	req->offs = dev;
1334		926
1335	REQ_SEND;	927	REQ_SEND;
1336	}	928	}
1337		929
1338	void	930	void
1339	aio_busy (delay,callback=&PL_sv_undef)	931	aio_busy (double delay, SV *callback=&PL_sv_undef)
1340	double delay
1341	SV * callback
1342	PPCODE:	932	PPCODE:
1343	{	933	{
1344	dREQ;	934	dREQ;
1345		935
1346	req->type = REQ_BUSY;	936	req->type = EIO_BUSY;
1347	req->fd = delay < 0. ? 0 : delay;	937	req->nv1 = delay < 0. ? 0. : delay;
1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1349		938
1350	REQ_SEND;	939	REQ_SEND;
1351	}	940	}
1352		941
1353	void	942	void
1354	aio_group (callback=&PL_sv_undef)	943	aio_group (SV *callback=&PL_sv_undef)
1355	SV * callback
1356	PROTOTYPE: ;$	944	PROTOTYPE: ;$
1357	PPCODE:	945	PPCODE:
1358	{	946	{
1359	dREQ;	947	dREQ;
1360		948
1361	req->type = REQ_GROUP;	949	req->type = EIO_GROUP;
		950
1362	req_send (req);	951	req_submit (req);
1363
1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));	952	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1365	}	953	}
1366		954
1367	void	955	void
1368	aio_nop (callback=&PL_sv_undef)	956	aio_nop (SV *callback=&PL_sv_undef)
1369	SV * callback	957	ALIAS:
		958	aio_nop = EIO_NOP
		959	aio_sync = EIO_SYNC
1370	PPCODE:	960	PPCODE:
1371	{	961	{
1372	dREQ;	962	dREQ;
1373		963
1374	req->type = REQ_NOP;	964	req->type = ix;
1375		965
1376	REQ_SEND;	966	REQ_SEND;
1377	}	967	}
1378		968
1379	void	969	int
1380	aioreq_pri (int pri = DEFAULT_PRI)	970	aioreq_pri (int pri = 0)
1381	CODE:	971	PROTOTYPE: ;$
		972	CODE:
		973	RETVAL = next_pri;
		974	if (items > 0)
		975	{
1382	if (pri < PRI_MIN) pri = PRI_MIN;	976	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1383	if (pri > PRI_MAX) pri = PRI_MAX;	977	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1384	next_pri = pri + PRI_BIAS;	978	next_pri = pri;
		979	}
		980	OUTPUT:
		981	RETVAL
1385		982
1386	void	983	void
1387	aioreq_nice (int nice = 0)	984	aioreq_nice (int nice = 0)
1388	CODE:	985	CODE:
1389	nice = next_pri - nice;	986	nice = next_pri - nice;
1390	if (nice < PRI_MIN) nice = PRI_MIN;	987	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1391	if (nice > PRI_MAX) nice = PRI_MAX;	988	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1392	next_pri = nice + PRI_BIAS;	989	next_pri = nice;
1393		990
1394	void	991	void
1395	flush ()	992	flush ()
1396	PROTOTYPE:	993	PROTOTYPE:
1397	CODE:	994	CODE:
1398	while (nreqs)	995	while (eio_nreqs ())
1399	{	996	{
1400	poll_wait ();	997	poll_wait ();
1401	poll_cb ();	998	poll_cb ();
1402	}	999	}
1403		1000
1404	void	1001	int
1405	poll()	1002	poll()
1406	PROTOTYPE:	1003	PROTOTYPE:
1407	CODE:	1004	CODE:
1408	if (nreqs)
1409	{
1410	poll_wait ();	1005	poll_wait ();
1411	poll_cb ();	1006	RETVAL = poll_cb ();
1412	}	1007	OUTPUT:
		1008	RETVAL
1413		1009
1414	int	1010	int
1415	poll_fileno()	1011	poll_fileno()
1416	PROTOTYPE:	1012	PROTOTYPE:
1417	CODE:	1013	CODE:
…		…
1429		1025
1430	void	1026	void
1431	poll_wait()	1027	poll_wait()
1432	PROTOTYPE:	1028	PROTOTYPE:
1433	CODE:	1029	CODE:
1434	if (nreqs)
1435	poll_wait ();	1030	poll_wait ();
1436		1031
1437	int	1032	int
1438	nreqs()	1033	nreqs()
1439	PROTOTYPE:	1034	PROTOTYPE:
1440	CODE:	1035	CODE:
1441	RETVAL = nreqs;	1036	RETVAL = eio_nreqs ();
1442	OUTPUT:	1037	OUTPUT:
1443	RETVAL	1038	RETVAL
1444		1039
		1040	int
		1041	nready()
		1042	PROTOTYPE:
		1043	CODE:
		1044	RETVAL = eio_nready ();
		1045	OUTPUT:
		1046	RETVAL
		1047
		1048	int
		1049	npending()
		1050	PROTOTYPE:
		1051	CODE:
		1052	RETVAL = eio_npending ();
		1053	OUTPUT:
		1054	RETVAL
		1055
		1056	int
		1057	nthreads()
		1058	PROTOTYPE:
		1059	CODE:
		1060	RETVAL = eio_nthreads ();
		1061	OUTPUT:
		1062	RETVAL
		1063
		1064	void _on_next_submit (SV *cb)
		1065	CODE:
		1066	SvREFCNT_dec (on_next_submit);
		1067	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1068
1445	PROTOTYPES: DISABLE	1069	PROTOTYPES: DISABLE
1446		1070
1447	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1071	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1448		1072
1449	void	1073	void
1450	cancel (aio_req_ornot req)	1074	cancel (aio_req_ornot req)
1451	CODE:	1075	CODE:
1452	req_cancel (req);	1076	eio_cancel (req);
1453		1077
1454	void	1078	void
1455	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1079	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1456	CODE:	1080	PPCODE:
		1081	{
		1082	if (GIMME_V != G_VOID)
		1083	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1084
		1085	if (items > 1)
		1086	{
		1087	SV *cb_cv = get_cb (callback);
		1088
1457	SvREFCNT_dec (req->callback);	1089	SvREFCNT_dec (req->callback);
1458	req->callback = newSVsv (callback);	1090	req->callback = SvREFCNT_inc (cb_cv);
		1091	}
		1092	}
1459		1093
1460	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1094	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1461		1095
1462	void	1096	void
1463	add (aio_req grp, ...)	1097	add (aio_req grp, ...)
1464	PPCODE:	1098	PPCODE:
1465	{	1099	{
1466	int i;	1100	int i;
1467	aio_req req;
1468		1101
1469	if (grp->fd == 2)	1102	if (grp->int1 == 2)
1470	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1103	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1471		1104
1472	for (i = 1; i < items; ++i )	1105	for (i = 1; i < items; ++i )
1473	{	1106	{
		1107	aio_req req;
		1108
1474	if (GIMME_V != G_VOID)	1109	if (GIMME_V != G_VOID)
1475	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1110	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1476		1111
1477	req = SvAIO_REQ (ST (i));	1112	req = SvAIO_REQ (ST (i));
1478		1113
1479	if (req)	1114	if (req)
1480	{	1115	eio_grp_add (grp, req);
1481	++grp->length;
1482	req->grp = grp;
1483
1484	req->grp_prev = 0;
1485	req->grp_next = grp->grp_first;
1486
1487	if (grp->grp_first)
1488	grp->grp_first->grp_prev = req;
1489
1490	grp->grp_first = req;
1491	}
1492	}	1116	}
1493	}	1117	}
1494		1118
1495	void	1119	void
1496	cancel_subs (aio_req_ornot req)	1120	cancel_subs (aio_req_ornot req)
…		…
1500	void	1124	void
1501	result (aio_req grp, ...)	1125	result (aio_req grp, ...)
1502	CODE:	1126	CODE:
1503	{	1127	{
1504	int i;	1128	int i;
		1129	AV *av;
		1130
		1131	grp->errorno = errno;
		1132
1505	AV *av = newAV ();	1133	av = newAV ();
1506		1134
1507	for (i = 1; i < items; ++i )	1135	for (i = 1; i < items; ++i )
1508	av_push (av, newSVsv (ST (i)));	1136	av_push (av, newSVsv (ST (i)));
1509		1137
1510	SvREFCNT_dec (grp->data);	1138	SvREFCNT_dec (grp->sv1);
1511	grp->data = (SV *)av;	1139	grp->sv1 = (SV *)av;
1512	}	1140	}
		1141
		1142	void
		1143	errno (aio_req grp, int errorno = errno)
		1144	CODE:
		1145	grp->errorno = errorno;
1513		1146
1514	void	1147	void
1515	limit (aio_req grp, int limit)	1148	limit (aio_req grp, int limit)
1516	CODE:	1149	CODE:
1517	grp->fd2 = limit;	1150	eio_grp_limit (grp, limit);
1518	aio_grp_feed (grp);
1519		1151
1520	void	1152	void
1521	feed (aio_req grp, SV *callback=&PL_sv_undef)	1153	feed (aio_req grp, SV *callback=&PL_sv_undef)
1522	CODE:	1154	CODE:
1523	{	1155	{
1524	SvREFCNT_dec (grp->fh2);	1156	SvREFCNT_dec (grp->sv2);
1525	grp->fh2 = newSVsv (callback);	1157	grp->sv2 = newSVsv (callback);
		1158	grp->feed = aio_grp_feed;
1526		1159
1527	if (grp->fd2 <= 0)	1160	if (grp->int2 <= 0)
1528	grp->fd2 = 2;	1161	grp->int2 = 2;
1529		1162
1530	aio_grp_feed (grp);	1163	eio_grp_limit (grp, grp->int2);
1531	}	1164	}
1532		1165

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