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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.68 by root, Tue Oct 24 03:40:25 2006 UTC vs.
Revision 1.155 by root, Fri Jul 17 00:56:54 2009 UTC

1	#if __linux	1	#include "libeio/xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"	9	#include "schmorp.h"
14
15	#include <pthread.h>
16		10
17	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
18	#include <errno.h>	13	#include <errno.h>
19	#include <sys/time.h>
20	#include <sys/select.h>
21	#include <sys/types.h>	14	#include <sys/types.h>
22	#include <sys/stat.h>	15	#include <sys/stat.h>
23	#include <limits.h>	16	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	17	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	18	#include <sched.h>
28		19
29	#if HAVE_SENDFILE	20	/* perl namespace pollution */
30	# if __linux	21	#undef VERSION
31	# include <sys/sendfile.h>	22
32	# elif __freebsd	23	#ifdef _WIN32
33	# include <sys/socket.h>	24
34	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
35	# elif __hpux	26	# undef malloc
36	# include <sys/socket.h>	27	# undef free
37	# elif __solaris /* not yet */	28
38	# 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
39	# else	61	#else
40	# error sendfile support requested but not available	62
41	# 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
42	#endif	70	#endif
43		71
44	/* used for struct dirent, AIX doesn't provide it */	72	/* perl stupidly overrides readdir and maybe others */
45	#ifndef NAME_MAX	73	/* with thread-unsafe versions, imagine that :( */
46	# 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
47	#endif	89	#endif
48		90
49	#if __ia64	91	/*****************************************************************************/
50	# define STACKSIZE 65536	92
51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	93	#if __GNUC__ >= 3
52	# define STACKSIZE PTHREAD_STACK_MIN	94	# define expect(expr,value) __builtin_expect ((expr),(value))
53	#else	95	#else
54	# define STACKSIZE 16384	96	# define expect(expr,value) (expr)
55	#endif	97	#endif
56		98
57	/* buffer size for various temporary buffers */	99	#define expect_false(expr) expect ((expr) != 0, 0)
58	#define AIO_BUFSIZE 65536	100	#define expect_true(expr) expect ((expr) != 0, 1)
59		101
60	#define dBUF \	102	/*****************************************************************************/
61	char *aio_buf = malloc (AIO_BUFSIZE); \
62	if (!aio_buf) \
63	return -1;
64		103
65	#define fBUF free (aio_buf)	104	static HV *stash;
66		105	typedef SV SV8; /* byte-sv, used for argument-checking */
67	enum {	106	typedef int aio_rfd; /* read file desriptor */
68	REQ_QUIT,	107	typedef int aio_wfd; /* write file descriptor */
69	REQ_OPEN, REQ_CLOSE,
70	REQ_READ, REQ_WRITE, REQ_READAHEAD,
71	REQ_SENDFILE,
72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
73	REQ_FSYNC, REQ_FDATASYNC,
74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
75	REQ_READDIR,
76	REQ_LINK, REQ_SYMLINK,
77	REQ_GROUP, REQ_NOP,
78	REQ_SLEEP,
79	};
80		108
81	#define AIO_REQ_KLASS "IO::AIO::REQ"	109	#define AIO_REQ_KLASS "IO::AIO::REQ"
82	#define AIO_GRP_KLASS "IO::AIO::GRP"	110	#define AIO_GRP_KLASS "IO::AIO::GRP"
83		111
84	typedef struct aio_cb	112	#define EIO_REQ_MEMBERS \
85	{
86	struct aio_cb *volatile next;
87
88	SV *data, *callback;	113	SV *callback; \
89	SV *fh, *fh2;	114	SV *sv1, *sv2; \
90	void *dataptr, *data2ptr;
91	Stat_t *statdata;
92	off_t offset;
93	size_t length;
94	ssize_t result;
95
96	STRLEN dataoffset;	115	STRLEN stroffset; \
97	int type;	116	SV *self;
98	int fd, fd2;
99	int errorno;
100	mode_t mode; /* open */
101		117
102	unsigned char flags;	118	#define EIO_NO_WRAPPERS 1
103	unsigned char pri;
104		119
105	SV *self; /* the perl counterpart of this request, if any */	120	#include "libeio/eio.h"
106	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	121
107	} aio_cb;	122	#ifndef POSIX_FADV_NORMAL
		123	# define POSIX_FADV_NORMAL 0
		124	# define NO_FADVISE 1
		125	#endif
		126
		127	#ifndef POSIX_FADV_SEQUENTIAL
		128	# define POSIX_FADV_SEQUENTIAL 0
		129	#endif
		130
		131	#ifndef POSIX_FADV_RANDOM
		132	# define POSIX_FADV_RANDOM 0
		133	#endif
		134
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138
		139	#ifndef POSIX_FADV_WILLNEED
		140	# define POSIX_FADV_WILLNEED 0
		141	#endif
		142
		143	#ifndef POSIX_FADV_DONTNEED
		144	# define POSIX_FADV_DONTNEED 0
		145	#endif
		146
		147	static int req_invoke (eio_req *req);
		148	#define EIO_FINISH(req) req_invoke (req)
		149	static void req_destroy (eio_req *grp);
		150	#define EIO_DESTROY(req) req_destroy (req)
108		151
109	enum {	152	enum {
110	FLAG_CANCELLED = 0x01,	153	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
111	};	154	};
112		155
		156	#include "libeio/eio.c"
		157
113	typedef aio_cb *aio_req;	158	typedef eio_req *aio_req;
114	typedef aio_cb *aio_req_ornot;	159	typedef eio_req *aio_req_ornot;
115		160
116	enum {	161	static SV *on_next_submit;
117	PRI_MIN = -4,	162	static int next_pri = EIO_PRI_DEFAULT;
118	PRI_MAX = 4,
119
120	DEFAULT_PRI = 0,
121	PRI_BIAS = -PRI_MIN,
122	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
123	};
124
125	static int next_pri = DEFAULT_PRI + PRI_BIAS;
126
127	static int started, wanted;
128	static volatile int nreqs;
129	static int max_outstanding = 1<<30;	163	static int max_outstanding;
130	static int respipe [2];
131		164
132	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	165	static s_epipe respipe;
133	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
134	#else
135	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
136	#endif
137		166
138	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	167	static void req_destroy (aio_req req);
139	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
140	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
141
142	/*
143	* a somewhat faster data structure might be nice, but
144	* with 8 priorities this actually needs <20 insns
145	* per shift, the most expensive operation.
146	*/
147	typedef struct {
148	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
149	int size;
150	} reqq;
151
152	static reqq req_queue;
153	static reqq res_queue;
154
155	int reqq_push (reqq *q, aio_req req)
156	{
157	int pri = req->pri;
158	req->next = 0;
159
160	if (q->qe[pri])
161	{
162	q->qe[pri]->next = req;
163	q->qe[pri] = req;
164	}
165	else
166	q->qe[pri] = q->qs[pri] = req;
167
168	return q->size++;
169	}
170
171	aio_req reqq_shift (reqq *q)
172	{
173	int pri;
174
175	if (!q->size)
176	return 0;
177
178	--q->size;
179
180	for (pri = NUM_PRI; pri--; )
181	{
182	aio_req req = q->qs[pri];
183
184	if (req)
185	{
186	if (!(q->qs[pri] = req->next))
187	q->qe[pri] = 0;
188
189	return req;
190	}
191	}
192
193	abort ();
194	}
195
196	static void req_invoke (aio_req req);	168	static void req_cancel (aio_req req);
197	static void req_free (aio_req req);	169
		170	static void want_poll (void)
		171	{
		172	/* write a dummy byte to the pipe so fh becomes ready */
		173	s_epipe_signal (&respipe);
		174	}
		175
		176	static void done_poll (void)
		177	{
		178	/* read any signals sent by the worker threads */
		179	s_epipe_drain (&respipe);
		180	}
198		181
199	/* must be called at most once */	182	/* must be called at most once */
200	static SV *req_sv (aio_req req, const char *klass)	183	static SV *req_sv (aio_req req, const char *klass)
201	{	184	{
202	if (!req->self)	185	if (!req->self)
…		…
220	return mg ? (aio_req)mg->mg_ptr : 0;	203	return mg ? (aio_req)mg->mg_ptr : 0;
221	}	204	}
222		205
223	static void aio_grp_feed (aio_req grp)	206	static void aio_grp_feed (aio_req grp)
224	{	207	{
225	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	208	if (grp->sv2 && SvOK (grp->sv2))
226	{	209	{
227	int old_len = grp->length;
228
229	if (grp->fh2 && SvOK (grp->fh2))
230	{
231	dSP;	210	dSP;
232		211
233	ENTER;	212	ENTER;
234	SAVETMPS;	213	SAVETMPS;
235	PUSHMARK (SP);	214	PUSHMARK (SP);
236	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	215	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
237	PUTBACK;	216	PUTBACK;
238	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	217	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
239	SPAGAIN;	218	SPAGAIN;
240	FREETMPS;	219	FREETMPS;
241	LEAVE;	220	LEAVE;
242	}
243
244	/* stop if no progress has been made */
245	if (old_len == grp->length)
246	{
247	SvREFCNT_dec (grp->fh2);
248	grp->fh2 = 0;
249	break;
250	}
251	}	221	}
252	}	222	}
253		223
254	static void aio_grp_dec (aio_req grp)	224	static void req_submit (eio_req *req)
255	{	225	{
256	--grp->length;	226	eio_submit (req);
257		227
258	/* call feeder, if applicable */	228	if (expect_false (on_next_submit))
259	aio_grp_feed (grp);
260
261	/* finish, if done */
262	if (!grp->length && grp->fd)
263	{	229	{
264	req_invoke (grp);	230	dSP;
265	req_free (grp);	231	SV *cb = sv_2mortal (on_next_submit);
		232
		233	on_next_submit = 0;
		234
		235	PUSHMARK (SP);
		236	PUTBACK;
		237	call_sv (cb, G_DISCARD | G_EVAL);
266	}	238	}
267	}	239	}
268		240
269	static void poll_wait ()	241	static int req_invoke (eio_req *req)
270	{	242	{
271	fd_set rfd;	243	dSP;
272		244
273	while (nreqs)	245	if (req->flags & FLAG_SV2_RO_OFF)
		246	SvREADONLY_off (req->sv2);
		247
		248	if (!EIO_CANCELLED (req) && req->callback)
274	{	249	{
275	int size;
276	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
277	pthread_mutex_lock (&reslock);
278	#endif
279	size = res_queue.size;
280	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
281	pthread_mutex_unlock (&reslock);
282	#endif
283
284	if (size)
285	return;
286
287	FD_ZERO(&rfd);
288	FD_SET(respipe [0], &rfd);
289
290	select (respipe [0] + 1, &rfd, 0, 0, 0);
291	}
292	}
293
294	static void req_invoke (aio_req req)
295	{
296	dSP;
297
298	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
299	{
300	errno = req->errorno;
301
302	ENTER;	250	ENTER;
303	SAVETMPS;	251	SAVETMPS;
304	PUSHMARK (SP);	252	PUSHMARK (SP);
305	EXTEND (SP, 1);	253	EXTEND (SP, 1);
306		254
307	switch (req->type)	255	switch (req->type)
308	{	256	{
309	case REQ_READDIR:	257	case EIO_READDIR:
310	{	258	{
311	SV *rv = &PL_sv_undef;	259	SV *rv = &PL_sv_undef;
312		260
313	if (req->result >= 0)	261	if (req->result >= 0)
314	{	262	{
		263	int i;
315	char *buf = req->data2ptr;	264	char *names = (char *)req->ptr2;
		265	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
316	AV *av = newAV ();	266	AV *av = newAV ();
317		267
318	while (req->result)	268	av_extend (av, req->result - 1);
		269
		270	for (i = 0; i < req->result; ++i)
319	{	271	{
		272	if (req->int1 & EIO_READDIR_DENTS)
		273	{
		274	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		275
		276	if (req->int1 & EIO_READDIR_CUSTOM2)
		277	{
		278	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		279	AV *avent = newAV ();
		280
		281	av_extend (avent, 2);
		282
		283	if (!sv_type [ent->type])
		284	{
		285	sv_type [ent->type] = newSViv (ent->type);
		286	SvREADONLY_on (sv_type [ent->type]);
		287	}
		288
		289	av_store (avent, 0, namesv);
		290	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		291	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		292
		293	av_store (av, i, newRV_noinc ((SV *)avent));
		294	}
		295	else
		296	av_store (av, i, namesv);
		297
		298	++ent;
		299	}
		300	else
		301	{
320	SV *sv = newSVpv (buf, 0);	302	SV *name = newSVpv (names, 0);
321
322	av_push (av, sv);	303	av_store (av, i, name);
323	buf += SvCUR (sv) + 1;	304	names += SvCUR (name) + 1;
324	req->result--;	305	}
325	}	306	}
326		307
327	rv = sv_2mortal (newRV_noinc ((SV *)av));	308	rv = sv_2mortal (newRV_noinc ((SV *)av));
328	}	309	}
329		310
330	PUSHs (rv);	311	PUSHs (rv);
		312
		313	if (req->int1 & EIO_READDIR_CUSTOM1)
		314	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
331	}	315	}
332	break;	316	break;
333		317
334	case REQ_OPEN:	318	case EIO_OPEN:
335	{	319	{
336	/* convert fd to fh */	320	/* convert fd to fh */
337	SV *fh;	321	SV *fh = &PL_sv_undef;
338		322
339	PUSHs (sv_2mortal (newSViv (req->result)));	323	if (req->result >= 0)
340	PUTBACK;	324	{
341	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	325	GV *gv = (GV *)sv_newmortal ();
342	SPAGAIN;	326	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		327	char sym [64];
		328	int symlen;
		329
		330	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		331	gv_init (gv, stash, sym, symlen, 0);
343		332
344	fh = SvREFCNT_inc (POPs);	333	symlen = snprintf (
		334	sym,
		335	sizeof (sym),
		336	"%s&=%d",
		337	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		338	(int)req->result
		339	);
345		340
		341	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		342	fh = (SV *)gv;
		343	}
		344
346	PUSHMARK (SP);	345	PUSHs (fh);
347	XPUSHs (sv_2mortal (fh));
348	}	346	}
349	break;	347	break;
350		348
351	case REQ_GROUP:	349	case EIO_GROUP:
352	req->fd = 2; /* mark group as finished */	350	req->int1 = 2; /* mark group as finished */
353		351
354	if (req->data)	352	if (req->sv1)
355	{	353	{
356	int i;	354	int i;
357	AV *av = (AV *)req->data;	355	AV *av = (AV *)req->sv1;
358		356
359	EXTEND (SP, AvFILL (av) + 1);	357	EXTEND (SP, AvFILL (av) + 1);
360	for (i = 0; i <= AvFILL (av); ++i)	358	for (i = 0; i <= AvFILL (av); ++i)
361	PUSHs (*av_fetch (av, i, 0));	359	PUSHs (*av_fetch (av, i, 0));
362	}	360	}
363	break;	361	break;
364		362
365	case REQ_NOP:	363	case EIO_NOP:
366	case REQ_SLEEP:	364	case EIO_BUSY:
367	break;	365	break;
		366
		367	case EIO_READLINK:
		368	if (req->result > 0)
		369	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		370	break;
		371
		372	case EIO_STAT:
		373	case EIO_LSTAT:
		374	case EIO_FSTAT:
		375	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		376	PL_laststatval = req->result;
		377	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		378	PUSHs (sv_2mortal (newSViv (req->result)));
		379	break;
		380
		381	case EIO_READ:
		382	{
		383	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		384	*SvEND (req->sv2) = 0;
		385	SvPOK_only (req->sv2);
		386	SvSETMAGIC (req->sv2);
		387	PUSHs (sv_2mortal (newSViv (req->result)));
		388	}
		389	break;
		390
		391	case EIO_DUP2:
		392	if (req->result > 0)
		393	req->result = 0;
		394	/* FALLTHROUGH */
368		395
369	default:	396	default:
370	PUSHs (sv_2mortal (newSViv (req->result)));	397	PUSHs (sv_2mortal (newSViv (req->result)));
371	break;	398	break;
372	}	399	}
373		400
		401	errno = req->errorno;
374		402
375	PUTBACK;	403	PUTBACK;
376	call_sv (req->callback, G_VOID | G_EVAL);	404	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
377	SPAGAIN;	405	SPAGAIN;
378		406
379	FREETMPS;	407	FREETMPS;
380	LEAVE;	408	LEAVE;
		409
		410	PUTBACK;
381	}	411	}
382		412
383	if (req->grp)	413	return !!SvTRUE (ERRSV);
384	{
385	aio_req grp = req->grp;
386
387	/* unlink request */
388	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
389	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
390
391	if (grp->grp_first == req)
392	grp->grp_first = req->grp_next;
393
394	aio_grp_dec (grp);
395	}
396
397	if (SvTRUE (ERRSV))
398	{
399	req_free (req);
400	croak (0);
401	}
402	}	414	}
403		415
404	static void req_free (aio_req req)	416	static void req_destroy (aio_req req)
405	{	417	{
406	if (req->self)	418	if (req->self)
407	{	419	{
408	sv_unmagic (req->self, PERL_MAGIC_ext);	420	sv_unmagic (req->self, PERL_MAGIC_ext);
409	SvREFCNT_dec (req->self);	421	SvREFCNT_dec (req->self);
410	}	422	}
411		423
412	SvREFCNT_dec (req->data);
413	SvREFCNT_dec (req->fh);	424	SvREFCNT_dec (req->sv1);
414	SvREFCNT_dec (req->fh2);	425	SvREFCNT_dec (req->sv2);
415	SvREFCNT_dec (req->callback);	426	SvREFCNT_dec (req->callback);
416	Safefree (req->statdata);
417
418	if (req->type == REQ_READDIR && req->result >= 0)
419	free (req->data2ptr);
420		427
421	Safefree (req);	428	Safefree (req);
422	}	429	}
423		430
424	static void req_cancel (aio_req req)	431	static void req_cancel_subs (aio_req grp)
425	{	432	{
426	req->flags |= FLAG_CANCELLED;	433	aio_req sub;
427		434
428	if (req->type == REQ_GROUP)	435	if (grp->type != EIO_GROUP)
		436	return;
		437
		438	SvREFCNT_dec (grp->sv2);
		439	grp->sv2 = 0;
		440
		441	eio_grp_cancel (grp);
		442	}
		443
		444	static void
		445	create_respipe (void)
		446	{
		447	if (s_epipe_renew (&respipe))
		448	croak ("IO::AIO: unable to initialize result pipe");
		449	}
		450
		451	static void poll_wait (void)
		452	{
		453	while (eio_nreqs ())
429	{	454	{
430	aio_req sub;	455	int size;
431		456
432	for (sub = req->grp_first; sub; sub = sub->grp_next)	457	X_LOCK (reslock);
433	req_cancel (sub);	458	size = res_queue.size;
		459	X_UNLOCK (reslock);
		460
		461	if (size)
		462	return;
		463
		464	etp_maybe_start_thread ();
		465
		466	s_epipe_wait (&respipe);
434	}	467	}
435	}	468	}
436		469
437	static int poll_cb ()	470	static int poll_cb (void)
438	{	471	{
439	dSP;
440	int count = 0;
441	int do_croak = 0;
442	aio_req req;
443
444	for (;;)	472	for (;;)
445	{	473	{
446	pthread_mutex_lock (&reslock);	474	int res = eio_poll ();
447	req = reqq_shift (&res_queue);
448		475
449	if (req)	476	if (res > 0)
450	{
451	if (!res_queue.size)
452	{
453	/* read any signals sent by the worker threads */
454	char buf [32];
455	while (read (respipe [0], buf, 32) == 32)
456	;
457	}
458	}
459
460	pthread_mutex_unlock (&reslock);
461
462	if (!req)
463	break;	477	croak (0);
464		478
465	--nreqs;	479	if (!max_outstanding || max_outstanding > eio_nreqs ())
		480	return res;
466		481
467	if (req->type == REQ_QUIT)	482	poll_wait ();
468	started--;
469	else if (req->type == REQ_GROUP && req->length)
470	{
471	req->fd = 1; /* mark request as delayed */
472	continue;
473	}
474	else
475	{
476	if (req->type == REQ_READ)
477	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
478
479	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
480	SvREADONLY_off (req->data);
481
482	if (req->statdata)
483	{
484	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
485	PL_laststatval = req->result;
486	PL_statcache = *(req->statdata);
487	}
488
489	req_invoke (req);
490
491	count++;
492	}
493
494	req_free (req);
495	}	483	}
496
497	return count;
498	}
499
500	static void *aio_proc(void *arg);
501
502	static void start_thread (void)
503	{
504	sigset_t fullsigset, oldsigset;
505	pthread_t tid;
506	pthread_attr_t attr;
507
508	pthread_attr_init (&attr);
509	pthread_attr_setstacksize (&attr, STACKSIZE);
510	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
511
512	sigfillset (&fullsigset);
513	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
514
515	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
516	started++;
517
518	sigprocmask (SIG_SETMASK, &oldsigset, 0);
519	}
520
521	static void req_send (aio_req req)
522	{
523	while (started < wanted && nreqs >= started)
524	start_thread ();
525
526	++nreqs;
527
528	pthread_mutex_lock (&reqlock);
529	reqq_push (&req_queue, req);
530	pthread_cond_signal (&reqwait);
531	pthread_mutex_unlock (&reqlock);
532
533	if (nreqs > max_outstanding)
534	for (;;)
535	{
536	poll_cb ();
537
538	if (nreqs <= max_outstanding)
539	break;
540
541	poll_wait ();
542	}
543	}
544
545	static void end_thread (void)
546	{
547	aio_req req;
548
549	Newz (0, req, 1, aio_cb);
550
551	req->type = REQ_QUIT;
552	req->pri = PRI_MAX + PRI_BIAS;
553
554	req_send (req);
555	}
556
557	static void min_parallel (int nthreads)
558	{
559	if (wanted < nthreads)
560	wanted = nthreads;
561	}
562
563	static void max_parallel (int nthreads)
564	{
565	int cur = started;
566
567	if (wanted > nthreads)
568	wanted = nthreads;
569
570	while (cur > wanted)
571	{
572	end_thread ();
573	cur--;
574	}
575
576	while (started > wanted)
577	{
578	poll_wait ();
579	poll_cb ();
580	}
581	}
582
583	static void create_pipe ()
584	{
585	if (pipe (respipe))
586	croak ("unable to initialize result pipe");
587
588	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
589	croak ("cannot set result pipe to nonblocking mode");
590
591	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
592	croak ("cannot set result pipe to nonblocking mode");
593	}
594
595	/*****************************************************************************/
596	/* work around various missing functions */
597
598	#if !HAVE_PREADWRITE
599	# define pread aio_pread
600	# define pwrite aio_pwrite
601
602	/*
603	* make our pread/pwrite safe against themselves, but not against
604	* normal read/write by using a mutex. slows down execution a lot,
605	* but that's your problem, not mine.
606	*/
607	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
608
609	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
610	{
611	ssize_t res;
612	off_t ooffset;
613
614	pthread_mutex_lock (&preadwritelock);
615	ooffset = lseek (fd, 0, SEEK_CUR);
616	lseek (fd, offset, SEEK_SET);
617	res = read (fd, buf, count);
618	lseek (fd, ooffset, SEEK_SET);
619	pthread_mutex_unlock (&preadwritelock);
620
621	return res;
622	}
623
624	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
625	{
626	ssize_t res;
627	off_t ooffset;
628
629	pthread_mutex_lock (&preadwritelock);
630	ooffset = lseek (fd, 0, SEEK_CUR);
631	lseek (fd, offset, SEEK_SET);
632	res = write (fd, buf, count);
633	lseek (fd, offset, SEEK_SET);
634	pthread_mutex_unlock (&preadwritelock);
635
636	return res;
637	}
638	#endif
639
640	#if !HAVE_FDATASYNC
641	# define fdatasync fsync
642	#endif
643
644	#if !HAVE_READAHEAD
645	# define readahead aio_readahead
646
647	static ssize_t readahead (int fd, off_t offset, size_t count)
648	{
649	dBUF;
650
651	while (count > 0)
652	{
653	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
654
655	pread (fd, aio_buf, len, offset);
656	offset += len;
657	count -= len;
658	}
659
660	fBUF;
661
662	errno = 0;
663	}
664	#endif
665
666	#if !HAVE_READDIR_R
667	# define readdir_r aio_readdir_r
668
669	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
670
671	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
672	{
673	struct dirent *e;
674	int errorno;
675
676	pthread_mutex_lock (&readdirlock);
677
678	e = readdir (dirp);
679	errorno = errno;
680
681	if (e)
682	{
683	*res = ent;
684	strcpy (ent->d_name, e->d_name);
685	}
686	else
687	*res = 0;
688
689	pthread_mutex_unlock (&readdirlock);
690
691	errno = errorno;
692	return e ? 0 : -1;
693	}
694	#endif
695
696	/* sendfile always needs emulation */
697	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
698	{
699	ssize_t res;
700
701	if (!count)
702	return 0;
703
704	#if HAVE_SENDFILE
705	# if __linux
706	res = sendfile (ofd, ifd, &offset, count);
707
708	# elif __freebsd
709	/*
710	* Of course, the freebsd sendfile is a dire hack with no thoughts
711	* wasted on making it similar to other I/O functions.
712	*/
713	{
714	off_t sbytes;
715	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
716
717	if (res < 0 && sbytes)
718	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
719	res = sbytes;
720	}
721
722	# elif __hpux
723	res = sendfile (ofd, ifd, offset, count, 0, 0);
724
725	# elif __solaris
726	{
727	struct sendfilevec vec;
728	size_t sbytes;
729
730	vec.sfv_fd = ifd;
731	vec.sfv_flag = 0;
732	vec.sfv_off = offset;
733	vec.sfv_len = count;
734
735	res = sendfilev (ofd, &vec, 1, &sbytes);
736
737	if (res < 0 && sbytes)
738	res = sbytes;
739	}
740
741	# endif
742	#else
743	res = -1;
744	errno = ENOSYS;
745	#endif
746
747	if (res < 0
748	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
749	#if __solaris
750	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
751	#endif
752	)
753	)
754	{
755	/* emulate sendfile. this is a major pain in the ass */
756	dBUF;
757
758	res = 0;
759
760	while (count)
761	{
762	ssize_t cnt;
763
764	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
765
766	if (cnt <= 0)
767	{
768	if (cnt && !res) res = -1;
769	break;
770	}
771
772	cnt = write (ofd, aio_buf, cnt);
773
774	if (cnt <= 0)
775	{
776	if (cnt && !res) res = -1;
777	break;
778	}
779
780	offset += cnt;
781	res += cnt;
782	count -= cnt;
783	}
784
785	fBUF;
786	}
787
788	return res;
789	}
790
791	/* read a full directory */
792	static int scandir_ (const char *path, void **namesp)
793	{
794	DIR *dirp;
795	union
796	{
797	struct dirent d;
798	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
799	} *u;
800	struct dirent *entp;
801	char *name, *names;
802	int memlen = 4096;
803	int memofs = 0;
804	int res = 0;
805	int errorno;
806
807	dirp = opendir (path);
808	if (!dirp)
809	return -1;
810
811	u = malloc (sizeof (*u));
812	names = malloc (memlen);
813
814	if (u && names)
815	for (;;)
816	{
817	errno = 0;
818	readdir_r (dirp, &u->d, &entp);
819
820	if (!entp)
821	break;
822
823	name = entp->d_name;
824
825	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
826	{
827	int len = strlen (name) + 1;
828
829	res++;
830
831	while (memofs + len > memlen)
832	{
833	memlen *= 2;
834	names = realloc (names, memlen);
835	if (!names)
836	break;
837	}
838
839	memcpy (names + memofs, name, len);
840	memofs += len;
841	}
842	}
843
844	errorno = errno;
845	free (u);
846	closedir (dirp);
847
848	if (errorno)
849	{
850	free (names);
851	errno = errorno;
852	res = -1;
853	}
854
855	*namesp = (void *)names;
856	return res;
857	}
858
859	/*****************************************************************************/
860
861	static void *aio_proc (void *thr_arg)
862	{
863	aio_req req;
864	int type;
865
866	do
867	{
868	pthread_mutex_lock (&reqlock);
869
870	for (;;)
871	{
872	req = reqq_shift (&req_queue);
873
874	if (req)
875	break;
876
877	pthread_cond_wait (&reqwait, &reqlock);
878	}
879
880	pthread_mutex_unlock (&reqlock);
881
882	errno = 0; /* strictly unnecessary */
883	type = req->type; /* remember type for QUIT check */
884
885	if (!(req->flags & FLAG_CANCELLED))
886	switch (type)
887	{
888	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
889	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
890
891	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
892	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
893
894	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
895	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
896	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
897
898	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
899	case REQ_CLOSE: req->result = close (req->fd); break;
900	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
901	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
902	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
903	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
904	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
905
906	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
907	case REQ_FSYNC: req->result = fsync (req->fd); break;
908	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
909
910	case REQ_SLEEP:
911	{
912	struct timeval tv;
913
914	tv.tv_sec = req->fd;
915	tv.tv_usec = req->fd2;
916
917	req->result = select (0, 0, 0, 0, &tv);
918	}
919
920	case REQ_GROUP:
921	case REQ_NOP:
922	case REQ_QUIT:
923	break;
924
925	default:
926	req->result = ENOSYS;
927	break;
928	}
929
930	req->errorno = errno;
931
932	pthread_mutex_lock (&reslock);
933
934	if (!reqq_push (&res_queue, req))
935	/* write a dummy byte to the pipe so fh becomes ready */
936	write (respipe [1], &respipe, 1);
937
938	pthread_mutex_unlock (&reslock);
939	}
940	while (type != REQ_QUIT);
941
942	return 0;
943	}
944
945	/*****************************************************************************/
946
947	static void atfork_prepare (void)
948	{
949	pthread_mutex_lock (&reqlock);
950	pthread_mutex_lock (&reslock);
951	#if !HAVE_PREADWRITE
952	pthread_mutex_lock (&preadwritelock);
953	#endif
954	#if !HAVE_READDIR_R
955	pthread_mutex_lock (&readdirlock);
956	#endif
957	}
958
959	static void atfork_parent (void)
960	{
961	#if !HAVE_READDIR_R
962	pthread_mutex_unlock (&readdirlock);
963	#endif
964	#if !HAVE_PREADWRITE
965	pthread_mutex_unlock (&preadwritelock);
966	#endif
967	pthread_mutex_unlock (&reslock);
968	pthread_mutex_unlock (&reqlock);
969	}	484	}
970		485
971	static void atfork_child (void)	486	static void atfork_child (void)
972	{	487	{
973	aio_req prv;
974
975	started = 0;
976
977	while (prv = reqq_shift (&req_queue))
978	req_free (prv);
979
980	while (prv = reqq_shift (&res_queue))
981	req_free (prv);
982
983	close (respipe [0]);
984	close (respipe [1]);
985	create_pipe ();	488	create_respipe ();
		489	}
986		490
987	atfork_parent ();	491	static SV *
		492	get_cb (SV *cb_sv)
		493	{
		494	SvGETMAGIC (cb_sv);
		495	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
988	}	496	}
989		497
990	#define dREQ \	498	#define dREQ \
		499	SV *cb_cv; \
991	aio_req req; \	500	aio_req req; \
992	int req_pri = next_pri; \	501	int req_pri = next_pri; \
993	next_pri = DEFAULT_PRI + PRI_BIAS; \	502	next_pri = EIO_PRI_DEFAULT; \
994	\	503	\
995	if (SvOK (callback) && !SvROK (callback)) \	504	cb_cv = get_cb (callback); \
996	croak ("callback must be undef or of reference type"); \
997	\	505	\
998	Newz (0, req, 1, aio_cb); \	506	Newz (0, req, 1, eio_req); \
999	if (!req) \	507	if (!req) \
1000	croak ("out of memory during aio_req allocation"); \	508	croak ("out of memory during eio_req allocation"); \
1001	\	509	\
1002	req->callback = newSVsv (callback); \	510	req->callback = SvREFCNT_inc (cb_cv); \
1003	req->pri = req_pri	511	req->pri = req_pri
1004		512
1005	#define REQ_SEND \	513	#define REQ_SEND \
		514	PUTBACK; \
1006	req_send (req); \	515	req_submit (req); \
		516	SPAGAIN; \
1007	\	517	\
1008	if (GIMME_V != G_VOID) \	518	if (GIMME_V != G_VOID) \
1009	XPUSHs (req_sv (req, AIO_REQ_KLASS));	519	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1010		520
1011	MODULE = IO::AIO PACKAGE = IO::AIO	521	MODULE = IO::AIO PACKAGE = IO::AIO
1012		522
1013	PROTOTYPES: ENABLE	523	PROTOTYPES: ENABLE
1014		524
1015	BOOT:	525	BOOT:
1016	{	526	{
		527	static const struct {
		528	const char *name;
		529	IV iv;
		530	} *civ, const_iv[] = {
		531	# define const_iv(name, value) { # name, (IV) value },
		532	# define const_eio(name) { # name, (IV) EIO_ ## name },
		533	const_iv (EXDEV , EXDEV)
		534	const_iv (ENOSYS , ENOSYS)
		535	const_iv (O_RDONLY, O_RDONLY)
		536	const_iv (O_WRONLY, O_WRONLY)
		537	const_iv (O_CREAT , O_CREAT)
		538	const_iv (O_TRUNC , O_TRUNC)
		539	#ifndef _WIN32
		540	const_iv (S_IFIFO , S_IFIFO)
		541	#endif
		542	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		543	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		544	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		545	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		546	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		547	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		548
		549	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		550	const_eio (SYNC_FILE_RANGE_WRITE)
		551	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		552
		553	const_eio (READDIR_DENTS)
		554	const_eio (READDIR_DIRS_FIRST)
		555	const_eio (READDIR_STAT_ORDER)
		556	const_eio (READDIR_FOUND_UNKNOWN)
		557
		558	const_eio (DT_UNKNOWN)
		559	const_eio (DT_FIFO)
		560	const_eio (DT_CHR)
		561	const_eio (DT_DIR)
		562	const_eio (DT_BLK)
		563	const_eio (DT_REG)
		564	const_eio (DT_LNK)
		565	const_eio (DT_SOCK)
		566	const_eio (DT_WHT)
		567	};
		568
1017	HV *stash = gv_stashpv ("IO::AIO", 1);	569	stash = gv_stashpv ("IO::AIO", 1);
1018	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1019	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1020	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1021		570
		571	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		572	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
		573
1022	create_pipe ();	574	create_respipe ();
1023	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1024	}
1025		575
		576	if (eio_init (want_poll, done_poll) < 0)
		577	croak ("IO::AIO: unable to initialise eio library");
		578
		579	/* atfork child called in fifo order, so before eio's handler */
		580	X_THREAD_ATFORK (0, 0, atfork_child);
		581	}
		582
1026	void	583	void
1027	min_parallel (nthreads)	584	max_poll_reqs (int nreqs)
1028	int nthreads
1029	PROTOTYPE: $	585	PROTOTYPE: $
		586	CODE:
		587	eio_set_max_poll_reqs (nreqs);
1030		588
1031	void	589	void
1032	max_parallel (nthreads)	590	max_poll_time (double nseconds)
1033	int nthreads
1034	PROTOTYPE: $	591	PROTOTYPE: $
1035
1036	int
1037	max_outstanding (nreqs)
1038	int nreqs
1039	PROTOTYPE: $
1040	CODE:	592	CODE:
1041	RETVAL = max_outstanding;	593	eio_set_max_poll_time (nseconds);
		594
		595	void
		596	min_parallel (int nthreads)
		597	PROTOTYPE: $
		598	CODE:
		599	eio_set_min_parallel (nthreads);
		600
		601	void
		602	max_parallel (int nthreads)
		603	PROTOTYPE: $
		604	CODE:
		605	eio_set_max_parallel (nthreads);
		606
		607	void
		608	max_idle (int nthreads)
		609	PROTOTYPE: $
		610	CODE:
		611	eio_set_max_idle (nthreads);
		612
		613	void
		614	max_outstanding (int maxreqs)
		615	PROTOTYPE: $
		616	CODE:
1042	max_outstanding = nreqs;	617	max_outstanding = maxreqs;
1043		618
1044	void	619	void
1045	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	620	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1046	SV * pathname
1047	int flags
1048	int mode
1049	SV * callback
1050	PROTOTYPE: $$$;$	621	PROTOTYPE: $$$;$
1051	PPCODE:	622	PPCODE:
1052	{	623	{
1053	dREQ;	624	dREQ;
1054		625
1055	req->type = REQ_OPEN;	626	req->type = EIO_OPEN;
1056	req->data = newSVsv (pathname);	627	req->sv1 = newSVsv (pathname);
1057	req->dataptr = SvPVbyte_nolen (req->data);	628	req->ptr1 = SvPVbyte_nolen (req->sv1);
1058	req->fd = flags;	629	req->int1 = flags;
1059	req->mode = mode;	630	req->int2 = mode;
1060		631
1061	REQ_SEND;	632	REQ_SEND;
1062	}	633	}
1063		634
1064	void	635	void
1065	aio_close (fh,callback=&PL_sv_undef)	636	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1066	SV * fh
1067	SV * callback
1068	PROTOTYPE: $;$	637	PROTOTYPE: $;$
1069	ALIAS:	638	ALIAS:
1070	aio_close = REQ_CLOSE
1071	aio_fsync = REQ_FSYNC	639	aio_fsync = EIO_FSYNC
1072	aio_fdatasync = REQ_FDATASYNC	640	aio_fdatasync = EIO_FDATASYNC
1073	PPCODE:	641	PPCODE:
1074	{	642	{
		643	int fd = s_fileno_croak (fh, 0);
1075	dREQ;	644	dREQ;
1076		645
1077	req->type = ix;	646	req->type = ix;
1078	req->fh = newSVsv (fh);	647	req->sv1 = newSVsv (fh);
1079	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	648	req->int1 = fd;
1080		649
1081	REQ_SEND (req);	650	REQ_SEND (req);
1082	}	651	}
1083		652
1084	void	653	void
		654	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		655	PROTOTYPE: $$$$;$
		656	PPCODE:
		657	{
		658	int fd = s_fileno_croak (fh, 0);
		659	dREQ;
		660
		661	req->type = EIO_SYNC_FILE_RANGE;
		662	req->sv1 = newSVsv (fh);
		663	req->int1 = fd;
		664	req->offs = offset;
		665	req->size = nbytes;
		666	req->int2 = flags;
		667
		668	REQ_SEND (req);
		669	}
		670
		671	void
		672	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		673	PROTOTYPE: $;$
		674	PPCODE:
		675	{
		676	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		677	int fd = s_fileno_croak (fh, 0);
		678	dREQ;
		679
		680	if (close_pipe < 0)
		681	{
		682	int pipefd [2];
		683
		684	if (pipe (pipefd) < 0
		685	|| close (pipefd [1]) < 0
		686	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		687	abort (); /*D*/
		688
		689	close_pipe = pipefd [0];
		690	}
		691
		692	req->type = EIO_DUP2;
		693	req->int1 = close_pipe;
		694	req->sv2 = newSVsv (fh);
		695	req->int2 = fd;
		696
		697	REQ_SEND (req);
		698	}
		699
		700	void
1085	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	701	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1086	SV * fh
1087	UV offset
1088	UV length
1089	SV * data
1090	UV dataoffset
1091	SV * callback
1092	ALIAS:	702	ALIAS:
1093	aio_read = REQ_READ	703	aio_read = EIO_READ
1094	aio_write = REQ_WRITE	704	aio_write = EIO_WRITE
1095	PROTOTYPE: $$$$$;$	705	PROTOTYPE: $$$$$;$
1096	PPCODE:	706	PPCODE:
1097	{	707	{
1098	aio_req req;
1099	STRLEN svlen;	708	STRLEN svlen;
		709	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1100	char *svptr = SvPVbyte (data, svlen);	710	char *svptr = SvPVbyte (data, svlen);
1101		711	UV len = SvUV (length);
1102	SvUPGRADE (data, SVt_PV);
1103	SvPOK_on (data);
1104		712
1105	if (dataoffset < 0)	713	if (dataoffset < 0)
1106	dataoffset += svlen;	714	dataoffset += svlen;
1107		715
1108	if (dataoffset < 0 || dataoffset > svlen)	716	if (dataoffset < 0 || dataoffset > svlen)
1109	croak ("data offset outside of string");	717	croak ("dataoffset outside of data scalar");
1110		718
1111	if (ix == REQ_WRITE)	719	if (ix == EIO_WRITE)
1112	{	720	{
1113	/* write: check length and adjust. */	721	/* write: check length and adjust. */
1114	if (length < 0 || length + dataoffset > svlen)	722	if (!SvOK (length) || len + dataoffset > svlen)
1115	length = svlen - dataoffset;	723	len = svlen - dataoffset;
1116	}	724	}
1117	else	725	else
1118	{	726	{
1119	/* read: grow scalar as necessary */	727	/* read: check type and grow scalar as necessary */
		728	SvUPGRADE (data, SVt_PV);
1120	svptr = SvGROW (data, length + dataoffset);	729	svptr = SvGROW (data, len + dataoffset + 1);
1121	}	730	}
1122
1123	if (length < 0)
1124	croak ("length must not be negative");
1125		731
1126	{	732	{
1127	dREQ;	733	dREQ;
1128		734
1129	req->type = ix;	735	req->type = ix;
1130	req->fh = newSVsv (fh);	736	req->sv1 = newSVsv (fh);
1131	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	737	req->int1 = fd;
1132	: IoOFP (sv_2io (fh)));	738	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1133	req->offset = offset;	739	req->size = len;
1134	req->length = length;
1135	req->data = SvREFCNT_inc (data);	740	req->sv2 = SvREFCNT_inc (data);
1136	req->dataptr = (char *)svptr + dataoffset;	741	req->ptr2 = (char *)svptr + dataoffset;
		742	req->stroffset = dataoffset;
1137		743
1138	if (!SvREADONLY (data))	744	if (!SvREADONLY (data))
1139	{	745	{
1140	SvREADONLY_on (data);	746	SvREADONLY_on (data);
1141	req->data2ptr = (void *)data;	747	req->flags |= FLAG_SV2_RO_OFF;
1142	}	748	}
1143		749
1144	REQ_SEND;	750	REQ_SEND;
1145	}	751	}
1146	}	752	}
1147		753
1148	void	754	void
		755	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		756	PROTOTYPE: $$;$
		757	PPCODE:
		758	{
		759	SV *data;
		760	dREQ;
		761
		762	req->type = EIO_READLINK;
		763	req->sv1 = newSVsv (path);
		764	req->ptr1 = SvPVbyte_nolen (req->sv1);
		765
		766	REQ_SEND;
		767	}
		768
		769	void
1149	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	770	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1150	SV * out_fh
1151	SV * in_fh
1152	UV in_offset
1153	UV length
1154	SV * callback
1155	PROTOTYPE: $$$$;$	771	PROTOTYPE: $$$$;$
1156	PPCODE:	772	PPCODE:
1157	{	773	{
		774	int ifd = s_fileno_croak (in_fh , 0);
		775	int ofd = s_fileno_croak (out_fh, 1);
1158	dREQ;	776	dREQ;
1159		777
1160	req->type = REQ_SENDFILE;	778	req->type = EIO_SENDFILE;
1161	req->fh = newSVsv (out_fh);	779	req->sv1 = newSVsv (out_fh);
1162	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	780	req->int1 = ofd;
1163	req->fh2 = newSVsv (in_fh);	781	req->sv2 = newSVsv (in_fh);
1164	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	782	req->int2 = ifd;
1165	req->offset = in_offset;	783	req->offs = in_offset;
1166	req->length = length;	784	req->size = length;
1167		785
1168	REQ_SEND;	786	REQ_SEND;
1169	}	787	}
1170		788
1171	void	789	void
1172	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	790	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1173	SV * fh
1174	UV offset
1175	IV length
1176	SV * callback
1177	PROTOTYPE: $$$;$	791	PROTOTYPE: $$$;$
1178	PPCODE:	792	PPCODE:
1179	{	793	{
		794	int fd = s_fileno_croak (fh, 0);
1180	dREQ;	795	dREQ;
1181		796
1182	req->type = REQ_READAHEAD;	797	req->type = EIO_READAHEAD;
1183	req->fh = newSVsv (fh);	798	req->sv1 = newSVsv (fh);
1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	799	req->int1 = fd;
1185	req->offset = offset;	800	req->offs = offset;
1186	req->length = length;	801	req->size = length;
1187		802
1188	REQ_SEND;	803	REQ_SEND;
1189	}	804	}
1190		805
1191	void	806	void
1192	aio_stat (fh_or_path,callback=&PL_sv_undef)	807	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1193	SV * fh_or_path
1194	SV * callback
1195	ALIAS:	808	ALIAS:
1196	aio_stat = REQ_STAT	809	aio_stat = EIO_STAT
1197	aio_lstat = REQ_LSTAT	810	aio_lstat = EIO_LSTAT
1198	PPCODE:	811	PPCODE:
1199	{	812	{
1200	dREQ;	813	dREQ;
1201		814
1202	New (0, req->statdata, 1, Stat_t);	815	req->sv1 = newSVsv (fh_or_path);
1203	if (!req->statdata)
1204	{
1205	req_free (req);
1206	croak ("out of memory during aio_req->statdata allocation");
1207	}
1208		816
1209	if (SvPOK (fh_or_path))	817	if (SvPOK (req->sv1))
1210	{	818	{
1211	req->type = ix;	819	req->type = ix;
1212	req->data = newSVsv (fh_or_path);
1213	req->dataptr = SvPVbyte_nolen (req->data);	820	req->ptr1 = SvPVbyte_nolen (req->sv1);
1214	}	821	}
1215	else	822	else
1216	{	823	{
1217	req->type = REQ_FSTAT;	824	req->type = EIO_FSTAT;
1218	req->fh = newSVsv (fh_or_path);
1219	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	825	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1220	}	826	}
1221		827
1222	REQ_SEND;	828	REQ_SEND;
1223	}	829	}
1224		830
1225	void	831	void
		832	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		833	PPCODE:
		834	{
		835	dREQ;
		836
		837	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		838	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		839	req->sv1 = newSVsv (fh_or_path);
		840
		841	if (SvPOK (req->sv1))
		842	{
		843	req->type = EIO_UTIME;
		844	req->ptr1 = SvPVbyte_nolen (req->sv1);
		845	}
		846	else
		847	{
		848	req->type = EIO_FUTIME;
		849	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		850	}
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		857	PPCODE:
		858	{
		859	dREQ;
		860
		861	req->sv1 = newSVsv (fh_or_path);
		862	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		863
		864	if (SvPOK (req->sv1))
		865	{
		866	req->type = EIO_TRUNCATE;
		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
		868	}
		869	else
		870	{
		871	req->type = EIO_FTRUNCATE;
		872	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		873	}
		874
		875	REQ_SEND;
		876	}
		877
		878	void
		879	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		880	ALIAS:
		881	aio_chmod = EIO_CHMOD
		882	aio_mkdir = EIO_MKDIR
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->int2 = mode;
		888	req->sv1 = newSVsv (fh_or_path);
		889
		890	if (SvPOK (req->sv1))
		891	{
		892	req->type = ix;
		893	req->ptr1 = SvPVbyte_nolen (req->sv1);
		894	}
		895	else
		896	{
		897	req->type = EIO_FCHMOD;
		898	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		899	}
		900
		901	REQ_SEND;
		902	}
		903
		904	void
		905	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		906	PPCODE:
		907	{
		908	dREQ;
		909
		910	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		911	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		912	req->sv1 = newSVsv (fh_or_path);
		913
		914	if (SvPOK (req->sv1))
		915	{
		916	req->type = EIO_CHOWN;
		917	req->ptr1 = SvPVbyte_nolen (req->sv1);
		918	}
		919	else
		920	{
		921	req->type = EIO_FCHOWN;
		922	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		923	}
		924
		925	REQ_SEND;
		926	}
		927
		928	void
		929	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		930	PPCODE:
		931	{
		932	dREQ;
		933
		934	req->type = EIO_READDIR;
		935	req->sv1 = newSVsv (pathname);
		936	req->ptr1 = SvPVbyte_nolen (req->sv1);
		937	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		938
		939	if (flags & EIO_READDIR_DENTS)
		940	req->int1 |= EIO_READDIR_CUSTOM2;
		941
		942	REQ_SEND;
		943	}
		944
		945	void
1226	aio_unlink (pathname,callback=&PL_sv_undef)	946	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1227	SV * pathname
1228	SV * callback
1229	ALIAS:	947	ALIAS:
1230	aio_unlink = REQ_UNLINK	948	aio_unlink = EIO_UNLINK
1231	aio_rmdir = REQ_RMDIR	949	aio_rmdir = EIO_RMDIR
1232	aio_readdir = REQ_READDIR	950	aio_readdir = EIO_READDIR
1233	PPCODE:	951	PPCODE:
1234	{	952	{
1235	dREQ;	953	dREQ;
1236		954
1237	req->type = ix;	955	req->type = ix;
1238	req->data = newSVsv (pathname);	956	req->sv1 = newSVsv (pathname);
1239	req->dataptr = SvPVbyte_nolen (req->data);	957	req->ptr1 = SvPVbyte_nolen (req->sv1);
		958
		959	REQ_SEND;
		960	}
		961
		962	void
		963	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		964	ALIAS:
		965	aio_link = EIO_LINK
		966	aio_symlink = EIO_SYMLINK
		967	aio_rename = EIO_RENAME
		968	PPCODE:
		969	{
		970	dREQ;
		971
		972	req->type = ix;
		973	req->sv1 = newSVsv (oldpath);
		974	req->ptr1 = SvPVbyte_nolen (req->sv1);
		975	req->sv2 = newSVsv (newpath);
		976	req->ptr2 = SvPVbyte_nolen (req->sv2);
1240		977
1241	REQ_SEND;	978	REQ_SEND;
1242	}	979	}
1243		980
1244	void	981	void
1245	aio_link (oldpath,newpath,callback=&PL_sv_undef)	982	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1246	SV * oldpath
1247	SV * newpath
1248	SV * callback
1249	ALIAS:
1250	aio_link = REQ_LINK
1251	aio_symlink = REQ_SYMLINK
1252	aio_rename = REQ_RENAME
1253	PPCODE:	983	PPCODE:
1254	{	984	{
1255	dREQ;	985	dREQ;
1256		986
1257	req->type = ix;	987	req->type = EIO_MKNOD;
1258	req->fh = newSVsv (oldpath);	988	req->sv1 = newSVsv (pathname);
1259	req->data2ptr = SvPVbyte_nolen (req->fh);	989	req->ptr1 = SvPVbyte_nolen (req->sv1);
1260	req->data = newSVsv (newpath);	990	req->int2 = (mode_t)mode;
1261	req->dataptr = SvPVbyte_nolen (req->data);	991	req->offs = dev;
1262		992
1263	REQ_SEND;	993	REQ_SEND;
1264	}	994	}
1265		995
1266	void	996	void
1267	aio_sleep (delay,callback=&PL_sv_undef)	997	aio_busy (double delay, SV *callback=&PL_sv_undef)
1268	double delay
1269	SV * callback
1270	PPCODE:	998	PPCODE:
1271	{	999	{
1272	dREQ;	1000	dREQ;
1273		1001
1274	req->type = REQ_SLEEP;	1002	req->type = EIO_BUSY;
1275	req->fd = delay < 0. ? 0 : delay;	1003	req->nv1 = delay < 0. ? 0. : delay;
1276	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1277		1004
1278	REQ_SEND;	1005	REQ_SEND;
1279	}	1006	}
1280		1007
1281	void	1008	void
1282	aio_group (callback=&PL_sv_undef)	1009	aio_group (SV *callback=&PL_sv_undef)
1283	SV * callback
1284	PROTOTYPE: ;$	1010	PROTOTYPE: ;$
1285	PPCODE:	1011	PPCODE:
1286	{	1012	{
1287	dREQ;	1013	dREQ;
1288		1014
1289	req->type = REQ_GROUP;	1015	req->type = EIO_GROUP;
		1016
1290	req_send (req);	1017	req_submit (req);
1291
1292	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1018	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1293	}	1019	}
1294		1020
1295	void	1021	void
1296	aio_nop (callback=&PL_sv_undef)	1022	aio_nop (SV *callback=&PL_sv_undef)
1297	SV * callback	1023	ALIAS:
		1024	aio_nop = EIO_NOP
		1025	aio_sync = EIO_SYNC
1298	PPCODE:	1026	PPCODE:
1299	{	1027	{
1300	dREQ;	1028	dREQ;
1301		1029
1302	req->type = REQ_NOP;	1030	req->type = ix;
1303		1031
1304	REQ_SEND;	1032	REQ_SEND;
1305	}	1033	}
1306		1034
1307	void	1035	int
1308	aioreq_pri (int pri = DEFAULT_PRI)	1036	aioreq_pri (int pri = 0)
1309	CODE:	1037	PROTOTYPE: ;$
		1038	CODE:
		1039	RETVAL = next_pri;
		1040	if (items > 0)
		1041	{
1310	if (pri < PRI_MIN) pri = PRI_MIN;	1042	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1311	if (pri > PRI_MAX) pri = PRI_MAX;	1043	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1312	next_pri = pri + PRI_BIAS;	1044	next_pri = pri;
		1045	}
		1046	OUTPUT:
		1047	RETVAL
1313		1048
1314	void	1049	void
1315	aioreq_nice (int nice = 0)	1050	aioreq_nice (int nice = 0)
1316	CODE:	1051	CODE:
1317	nice = next_pri - nice;	1052	nice = next_pri - nice;
1318	if (nice < PRI_MIN) nice = PRI_MIN;	1053	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1319	if (nice > PRI_MAX) nice = PRI_MAX;	1054	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1320	next_pri = nice + PRI_BIAS;	1055	next_pri = nice;
1321		1056
1322	void	1057	void
1323	flush ()	1058	flush ()
1324	PROTOTYPE:	1059	PROTOTYPE:
1325	CODE:	1060	CODE:
1326	while (nreqs)	1061	while (eio_nreqs ())
1327	{	1062	{
1328	poll_wait ();	1063	poll_wait ();
1329	poll_cb ();	1064	poll_cb ();
1330	}	1065	}
1331		1066
1332	void	1067	int
1333	poll()	1068	poll()
1334	PROTOTYPE:	1069	PROTOTYPE:
1335	CODE:	1070	CODE:
1336	if (nreqs)
1337	{
1338	poll_wait ();	1071	poll_wait ();
1339	poll_cb ();	1072	RETVAL = poll_cb ();
1340	}	1073	OUTPUT:
		1074	RETVAL
1341		1075
1342	int	1076	int
1343	poll_fileno()	1077	poll_fileno()
1344	PROTOTYPE:	1078	PROTOTYPE:
1345	CODE:	1079	CODE:
1346	RETVAL = respipe [0];	1080	RETVAL = s_epipe_fd (&respipe);
1347	OUTPUT:	1081	OUTPUT:
1348	RETVAL	1082	RETVAL
1349		1083
1350	int	1084	int
1351	poll_cb(...)	1085	poll_cb(...)
…		…
1357		1091
1358	void	1092	void
1359	poll_wait()	1093	poll_wait()
1360	PROTOTYPE:	1094	PROTOTYPE:
1361	CODE:	1095	CODE:
1362	if (nreqs)
1363	poll_wait ();	1096	poll_wait ();
1364		1097
1365	int	1098	int
1366	nreqs()	1099	nreqs()
1367	PROTOTYPE:	1100	PROTOTYPE:
1368	CODE:	1101	CODE:
1369	RETVAL = nreqs;	1102	RETVAL = eio_nreqs ();
1370	OUTPUT:	1103	OUTPUT:
1371	RETVAL	1104	RETVAL
1372		1105
		1106	int
		1107	nready()
		1108	PROTOTYPE:
		1109	CODE:
		1110	RETVAL = eio_nready ();
		1111	OUTPUT:
		1112	RETVAL
		1113
		1114	int
		1115	npending()
		1116	PROTOTYPE:
		1117	CODE:
		1118	RETVAL = eio_npending ();
		1119	OUTPUT:
		1120	RETVAL
		1121
		1122	int
		1123	nthreads()
		1124	PROTOTYPE:
		1125	CODE:
		1126	RETVAL = eio_nthreads ();
		1127	OUTPUT:
		1128	RETVAL
		1129
		1130	int
		1131	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1132	PROTOTYPE: $$$$
		1133	CODE:
		1134	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1135	RETVAL = posix_fadvise (fh, offset, length, advice);
		1136	#else
		1137	RETVAL = errno = ENOSYS;
		1138	#endif
		1139	OUTPUT:
		1140	RETVAL
		1141
		1142	ssize_t
		1143	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1144	PROTOTYPE: $$$$
		1145	CODE:
		1146	eio_sendfile_sync (ofh, ifh, offset, count);
		1147
		1148	void _on_next_submit (SV *cb)
		1149	CODE:
		1150	SvREFCNT_dec (on_next_submit);
		1151	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1152
1373	PROTOTYPES: DISABLE	1153	PROTOTYPES: DISABLE
1374		1154
1375	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1155	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1376		1156
1377	void	1157	void
1378	cancel (aio_req_ornot req)	1158	cancel (aio_req_ornot req)
1379	CODE:	1159	CODE:
1380	req_cancel (req);	1160	eio_cancel (req);
1381		1161
1382	void	1162	void
1383	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1163	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1384	CODE:	1164	PPCODE:
		1165	{
		1166	if (GIMME_V != G_VOID)
		1167	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1168
		1169	if (items > 1)
		1170	{
		1171	SV *cb_cv =get_cb (callback);
		1172
1385	SvREFCNT_dec (req->callback);	1173	SvREFCNT_dec (req->callback);
1386	req->callback = newSVsv (callback);	1174	req->callback = SvREFCNT_inc (cb_cv);
		1175	}
		1176	}
1387		1177
1388	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1178	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1389		1179
1390	void	1180	void
1391	add (aio_req grp, ...)	1181	add (aio_req grp, ...)
1392	PPCODE:	1182	PPCODE:
1393	{	1183	{
1394	int i;	1184	int i;
1395	aio_req req;
1396		1185
1397	if (grp->fd == 2)	1186	if (grp->int1 == 2)
1398	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1187	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1399		1188
1400	for (i = 1; i < items; ++i )	1189	for (i = 1; i < items; ++i )
1401	{	1190	{
		1191	aio_req req;
		1192
1402	if (GIMME_V != G_VOID)	1193	if (GIMME_V != G_VOID)
1403	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1194	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1404		1195
1405	req = SvAIO_REQ (ST (i));	1196	req = SvAIO_REQ (ST (i));
1406		1197
1407	if (req)	1198	if (req)
1408	{	1199	eio_grp_add (grp, req);
1409	++grp->length;
1410	req->grp = grp;
1411
1412	req->grp_prev = 0;
1413	req->grp_next = grp->grp_first;
1414
1415	if (grp->grp_first)
1416	grp->grp_first->grp_prev = req;
1417
1418	grp->grp_first = req;
1419	}	1200	}
1420	}
1421	}	1201	}
		1202
		1203	void
		1204	cancel_subs (aio_req_ornot req)
		1205	CODE:
		1206	req_cancel_subs (req);
1422		1207
1423	void	1208	void
1424	result (aio_req grp, ...)	1209	result (aio_req grp, ...)
1425	CODE:	1210	CODE:
1426	{	1211	{
1427	int i;	1212	int i;
		1213	AV *av;
		1214
		1215	grp->errorno = errno;
		1216
1428	AV *av = newAV ();	1217	av = newAV ();
		1218	av_extend (av, items - 1);
1429		1219
1430	for (i = 1; i < items; ++i )	1220	for (i = 1; i < items; ++i )
1431	av_push (av, newSVsv (ST (i)));	1221	av_push (av, newSVsv (ST (i)));
1432		1222
1433	SvREFCNT_dec (grp->data);	1223	SvREFCNT_dec (grp->sv1);
1434	grp->data = (SV *)av;	1224	grp->sv1 = (SV *)av;
1435	}	1225	}
		1226
		1227	void
		1228	errno (aio_req grp, int errorno = errno)
		1229	CODE:
		1230	grp->errorno = errorno;
1436		1231
1437	void	1232	void
1438	limit (aio_req grp, int limit)	1233	limit (aio_req grp, int limit)
1439	CODE:	1234	CODE:
1440	grp->fd2 = limit;	1235	eio_grp_limit (grp, limit);
1441	aio_grp_feed (grp);
1442		1236
1443	void	1237	void
1444	feed (aio_req grp, SV *callback=&PL_sv_undef)	1238	feed (aio_req grp, SV *callback=&PL_sv_undef)
1445	CODE:	1239	CODE:
1446	{	1240	{
1447	SvREFCNT_dec (grp->fh2);	1241	SvREFCNT_dec (grp->sv2);
1448	grp->fh2 = newSVsv (callback);	1242	grp->sv2 = newSVsv (callback);
		1243	grp->feed = aio_grp_feed;
1449		1244
1450	if (grp->fd2 <= 0)	1245	if (grp->int2 <= 0)
1451	grp->fd2 = 2;	1246	grp->int2 = 2;
1452		1247
1453	aio_grp_feed (grp);	1248	eio_grp_limit (grp, grp->int2);
1454	}	1249	}
1455		1250

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