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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.47 by root, Sun Oct 22 10:10:23 2006 UTC vs.
Revision 1.221 by root, Wed Aug 22 22:28:03 2012 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	14	#include <sys/types.h>
17	#include <sys/stat.h>	15	#include <sys/stat.h>
18	#include <limits.h>	16	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	17	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	18	#include <sched.h>
23		19
24	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
		23
25	# if __linux	24	#if __linux__
		25	# include <linux/fs.h>
		26	# ifdef FS_IOC_FIEMAP
		27	# include <linux/types.h>
		28	# include <linux/fiemap.h>
		29	# define HAVE_FIEMAP 1
		30	# endif
		31	#endif
		32
		33	/* perl namespace pollution */
		34	#undef VERSION
		35
		36	/* perl stupidly overrides readdir and maybe others */
		37	/* with thread-unsafe versions, imagine that :( */
		38	#undef readdir
		39	#undef opendir
		40	#undef closedir
		41
		42	#ifdef _WIN32
		43
		44	// perl overrides all those nice libc functions
		45
		46	#undef malloc
		47	#undef free
		48	#undef open
		49	#undef read
		50	#undef write
		51	#undef send
		52	#undef recv
		53	#undef stat
		54	#undef lstat
		55	#undef fstat
		56	#undef truncate
		57	#undef ftruncate
		58	#undef open
		59	#undef link
		60	#undef close
		61	#undef unlink
		62	#undef mkdir
		63	#undef rmdir
		64	#undef rename
		65	#undef lseek
		66	#undef opendir
		67	#undef readdir
		68	#undef closedir
		69	#undef chmod
		70	#undef fchmod
		71	#undef dup
		72	#undef dup2
		73	#undef abort
		74	#undef pipe
		75
		76	#define EIO_STRUCT_STAT struct _stati64
		77	#define EIO_STRUCT_STATI64
		78
		79	#else
		80
		81	#include <sys/time.h>
26	# include <sys/sendfile.h>	82	#include <sys/select.h>
27	# elif __freebsd	83	#include <unistd.h>
28	# include <sys/socket.h>	84	#include <utime.h>
29	# include <sys/uio.h>	85	#include <signal.h>
30	# elif __hpux	86
31	# include <sys/socket.h>	87	#define EIO_STRUCT_STAT Stat_t
32	# elif __solaris /* not yet */	88
33	# include <sys/sendfile.h>	89	#endif
		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	SV *sv3, *sv4; \
		114	STRLEN stroffset; \
		115	SV *self;
		116
		117	#define EIO_NO_WRAPPERS 1
		118
		119	#include "libeio/config.h"
		120	#include "libeio/eio.h"
		121
		122	static int req_invoke (eio_req *req);
		123	#define EIO_FINISH(req) req_invoke (req)
		124	static void req_destroy (eio_req *grp);
		125	#define EIO_DESTROY(req) req_destroy (req)
		126
		127	#include "libeio/eio.c"
		128
		129	#if !HAVE_POSIX_FADVISE
		130	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		131	#endif
		132
		133	#if !HAVE_POSIX_MADVISE
		134	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		135	#endif
		136
		137	#ifndef MAP_ANONYMOUS
		138	# ifdef MAP_ANON
		139	# define MAP_ANONYMOUS MAP_ANON
34	# else	140	# else
35	# error sendfile support requested but not available	141	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	142	# endif
37	#endif	143	#endif
38		144
39	/* used for struct dirent, AIX doesn't provide it */	145	/* defines all sorts of constants to 0 unless they are already defined */
40	#ifndef NAME_MAX	146	#include "def0.h"
41	# define NAME_MAX 4096
42	#endif
43		147
44	#if __ia64	148	#ifndef makedev
45	# define STACKSIZE 65536	149	# define makedev(maj,min) (((maj) << 8) | (min))
46	#else
47	# define STACKSIZE 8192
48	#endif	150	#endif
		151	#ifndef major
		152	# define major(dev) ((dev) >> 8)
		153	#endif
		154	#ifndef minor
		155	# define minor(dev) ((dev) & 0xff)
		156	#endif
49		157
50	enum {	158	#ifndef PAGESIZE
51	REQ_QUIT,	159	# define PAGESIZE sysconf (_SC_PAGESIZE)
52	REQ_OPEN, REQ_CLOSE,	160	#endif
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};
63		161
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	162	/*****************************************************************************/
65	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		163
67	typedef struct aio_cb	164	static void
		165	fiemap (eio_req *req)
68	{	166	{
69	struct aio_cb *grp, *grp_prev, *grp_next;	167	req->result = -1;
70		168
71	struct aio_cb *volatile next;	169	#if HAVE_FIEMAP
		170	/* assume some c99 */
		171	struct fiemap *fiemap = 0;
		172	size_t end_offset;
		173	int count = req->int3;
72		174
73	SV *self; /* the perl counterpart of this request, if any */	175	req->flags |= EIO_FLAG_PTR1_FREE;
74		176
75	SV *data, *callback;	177	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
76	SV *fh, *fh2;	178	/* increase in 3.5kb steps */
77	void *dataptr, *data2ptr;	179	if (count < 0)
78	Stat_t *statdata;	180	count = 8;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82		181
83	int type;	182	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
84	int fd, fd2;	183	errno = ENOMEM;
85	int errorno;	184	if (!fiemap)
86	STRLEN dataoffset;	185	return;
87	mode_t mode; /* open */
88	unsigned char cancelled;
89	} aio_cb;
90		186
91	typedef aio_cb *aio_req;	187	req->ptr1 = fiemap;
92	typedef aio_cb *aio_req_ornot;
93		188
94	static int started, wanted;	189	fiemap->fm_start = req->offs;
95	static volatile int nreqs;	190	fiemap->fm_length = req->size;
96	static int max_outstanding = 1<<30;	191	fiemap->fm_flags = req->int2;
97	static int respipe [2];	192	fiemap->fm_extent_count = count;
98		193
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	194	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap))
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	195	return;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		196
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	197	if (req->int3 >= 0 /* not autosizing */
104	static volatile aio_req ress, rese; /* queue start, queue end */	198	|| !fiemap->fm_mapped_extents /* no more extents */
		199	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		200	goto done;
105		201
106	static void req_free (aio_req req);	202	/* else we have to loop -
		203	* it would be tempting (atcually I tried that first) to just query the
		204	* number of extents needed, but linux often feels like not returning all
		205	* extents, without telling us it left any out. this complicates
		206	* this quite a bit.
		207	*/
107		208
108	/* must be called at most once */	209	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
109	static SV *req_sv (aio_req req, const char *klass)
110	{
111	req->self = (SV *)newHV ();
112	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
113		210
114	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	211	for (;;)
115	}
116
117	static aio_req SvAIO_REQ (SV *sv)
118	{
119	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
120	croak ("object of class " AIO_REQ_KLASS " expected");
121
122	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
123
124	return mg ? (aio_req)mg->mg_ptr : 0;
125	}
126
127	static void poll_wait ()
128	{
129	if (nreqs && !ress)
130	{	212	{
131	fd_set rfd;	213	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
132	FD_ZERO(&rfd);	214	char scratch[3072];
133	FD_SET(respipe [0], &rfd);	215	struct fiemap *incmap = (struct fiemap *)scratch;
134		216
135	select (respipe [0] + 1, &rfd, 0, 0, 0);	217	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
136	}	218	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
137	}	219	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		220	incmap->fm_flags = fiemap->fm_flags;
		221	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
138		222
139	static void req_invoke (aio_req req)	223	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap))
140	{
141	dSP;
142	int errorno = errno;
143
144	if (req->cancelled || !SvOK (req->callback))
145	return;	224	return;
146		225
147	errno = req->errorno;	226	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		227	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		228	errno = ENOMEM;
		229	if (!fiemap)
		230	return;
148		231
149	ENTER;	232	req->ptr1 = fiemap;
150	PUSHMARK (SP);
151		233
152	switch (req->type)	234	for (count = 0; count < incmap->fm_mapped_extents; ++count)
153	{
154	case REQ_READDIR:
155	{	235	{
156	SV *rv = &PL_sv_undef;	236	struct fiemap_extent *e = incmap->fm_extents + count;
157		237
158	if (req->result >= 0)	238	if (e->fe_logical + e->fe_length >= end_offset)
159	{	239	goto done;
160	char *buf = req->data2ptr;
161	AV *av = newAV ();
162		240
163	while (req->result)	241	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
164	{
165	SV *sv = newSVpv (buf, 0);
166		242
167	av_push (av, sv);	243	if (e->fe_flags & FIEMAP_EXTENT_LAST)
168	buf += SvCUR (sv) + 1;	244	goto done;
169	req->result--;
170	}
171		245
172	rv = sv_2mortal (newRV_noinc ((SV *)av));
173	}
174
175	XPUSHs (rv);
176	}
177	break;
178
179	case REQ_OPEN:
180	{
181	/* convert fd to fh */
182	SV *fh;
183
184	XPUSHs (sv_2mortal (newSViv (req->result)));
185	PUTBACK;
186	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
187	SPAGAIN;
188
189	fh = SvREFCNT_inc (POPs);
190
191	PUSHMARK (SP);
192	XPUSHs (sv_2mortal (fh));
193	}
194	break;
195
196	case REQ_SLEEP:
197	case REQ_GROUP:
198	break;
199
200	default:
201	XPUSHs (sv_2mortal (newSViv (req->result)));
202	break;
203	}
204
205
206	PUTBACK;
207	call_sv (req->callback, G_VOID | G_EVAL);
208	SPAGAIN;
209
210	if (SvTRUE (ERRSV))
211	{
212	req_free (req);
213	croak (0);
214	}
215
216	LEAVE;
217
218	errno = errorno;
219	}
220
221	static void req_free (aio_req req)
222	{
223	if (req->grp)
224	{
225	aio_req grp = req->grp;
226
227	/* unlink request */
228	req->grp_next->grp_prev = req->grp_prev;
229	req->grp_prev->grp_next = req->grp_next;
230
231	if (grp->grp_next == grp && grp->fd)
232	{
233	req_invoke (grp);
234	req_free (grp);
235	}	246	}
236	}	247	}
237		248
		249	done:
		250	req->result = 0;
		251
		252	#else
		253	errno = ENOSYS;
		254	#endif
		255	}
		256
		257	/*****************************************************************************/
		258
		259	enum {
		260	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		261	};
		262
		263	typedef eio_req *aio_req;
		264	typedef eio_req *aio_req_ornot;
		265	typedef eio_wd aio_wd;
		266
		267	static SV *on_next_submit;
		268	static int next_pri = EIO_PRI_DEFAULT;
		269	static int max_outstanding;
		270
		271	static s_epipe respipe;
		272
		273	static void req_destroy (aio_req req);
		274	static void req_cancel (aio_req req);
		275
		276	static void
		277	want_poll (void)
		278	{
		279	/* write a dummy byte to the pipe so fh becomes ready */
		280	s_epipe_signal (&respipe);
		281	}
		282
		283	static void
		284	done_poll (void)
		285	{
		286	/* read any signals sent by the worker threads */
		287	s_epipe_drain (&respipe);
		288	}
		289
		290	/* must be called at most once */
		291	static SV *
		292	req_sv (aio_req req, HV *stash)
		293	{
		294	if (!req->self)
		295	{
		296	req->self = (SV *)newHV ();
		297	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		298	}
		299
		300	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		301	}
		302
		303	static SV *
		304	newSVaio_wd (aio_wd wd)
		305	{
		306	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		307	}
		308
		309	static aio_req
		310	SvAIO_REQ (SV *sv)
		311	{
		312	MAGIC *mg;
		313
		314	if (!SvROK (sv)
		315	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		316	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		317	&& SvSTASH (SvRV (sv)) != aio_req_stash
		318	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		319	croak ("object of class IO::AIO::REQ expected");
		320
		321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		322
		323	return mg ? (aio_req)mg->mg_ptr : 0;
		324	}
		325
		326	static aio_wd
		327	SvAIO_WD (SV *sv)
		328	{
		329	if (!SvROK (sv)
		330	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		331	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		332	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		333
		334	return (aio_wd)(long)SvIVX (SvRV (sv));
		335	}
		336
		337	static void
		338	aio_grp_feed (aio_req grp)
		339	{
		340	if (grp->sv2 && SvOK (grp->sv2))
		341	{
		342	dSP;
		343
		344	ENTER;
		345	SAVETMPS;
		346	PUSHMARK (SP);
		347	XPUSHs (req_sv (grp, aio_grp_stash));
		348	PUTBACK;
		349	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		350	SPAGAIN;
		351	FREETMPS;
		352	LEAVE;
		353	}
		354	}
		355
		356	static void
		357	req_submit (eio_req *req)
		358	{
		359	eio_submit (req);
		360
		361	if (expect_false (on_next_submit))
		362	{
		363	dSP;
		364	SV *cb = sv_2mortal (on_next_submit);
		365
		366	on_next_submit = 0;
		367
		368	PUSHMARK (SP);
		369	PUTBACK;
		370	call_sv (cb, G_DISCARD | G_EVAL);
		371	}
		372	}
		373
		374	static int
		375	req_invoke (eio_req *req)
		376	{
		377	if (req->flags & FLAG_SV2_RO_OFF)
		378	SvREADONLY_off (req->sv2);
		379
		380	if (!EIO_CANCELLED (req) && req->callback)
		381	{
		382	dSP;
		383	static SV *sv_result_cache; /* caches the result integer SV */
		384	SV *sv_result;
		385
		386	ENTER;
		387	SAVETMPS;
		388	PUSHMARK (SP);
		389	EXTEND (SP, 1);
		390
		391	/* do not recreate the result IV from scratch each time */
		392	if (expect_true (sv_result_cache))
		393	{
		394	sv_result = sv_result_cache; sv_result_cache = 0;
		395	SvIV_set (sv_result, req->result);
		396	SvIOK_only (sv_result);
		397	}
		398	else
		399	{
		400	sv_result = newSViv (req->result);
		401	SvREADONLY_on (sv_result);
		402	}
		403
		404	switch (req->type)
		405	{
		406	case EIO_WD_OPEN:
		407	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		408	break;
		409
		410	case EIO_READDIR:
		411	{
		412	SV *rv = &PL_sv_undef;
		413
		414	if (req->result >= 0)
		415	{
		416	int i;
		417	char *names = (char *)req->ptr2;
		418	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		419	AV *av = newAV ();
		420
		421	av_extend (av, req->result - 1);
		422
		423	for (i = 0; i < req->result; ++i)
		424	{
		425	if (req->int1 & EIO_READDIR_DENTS)
		426	{
		427	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		428
		429	if (req->int1 & EIO_READDIR_CUSTOM2)
		430	{
		431	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		432	AV *avent = newAV ();
		433
		434	av_extend (avent, 2);
		435
		436	if (!sv_type [ent->type])
		437	{
		438	sv_type [ent->type] = newSViv (ent->type);
		439	SvREADONLY_on (sv_type [ent->type]);
		440	}
		441
		442	av_store (avent, 0, namesv);
		443	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		444	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		445
		446	av_store (av, i, newRV_noinc ((SV *)avent));
		447	}
		448	else
		449	av_store (av, i, namesv);
		450
		451	++ent;
		452	}
		453	else
		454	{
		455	SV *name = newSVpv (names, 0);
		456	av_store (av, i, name);
		457	names += SvCUR (name) + 1;
		458	}
		459	}
		460
		461	rv = sv_2mortal (newRV_noinc ((SV *)av));
		462	}
		463
		464	PUSHs (rv);
		465
		466	if (req->int1 & EIO_READDIR_CUSTOM1)
		467	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		468	}
		469	break;
		470
		471	case EIO_OPEN:
		472	{
		473	/* convert fd to fh */
		474	SV *fh = &PL_sv_undef;
		475
		476	if (req->result >= 0)
		477	{
		478	GV *gv = (GV *)sv_newmortal ();
		479	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		480	char sym [64];
		481	int symlen;
		482
		483	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		484	gv_init (gv, aio_stash, sym, symlen, 0);
		485
		486	symlen = snprintf (
		487	sym,
		488	sizeof (sym),
		489	"%s&=%d",
		490	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		491	(int)req->result
		492	);
		493
		494	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		495	fh = (SV *)gv;
		496	}
		497
		498	PUSHs (fh);
		499	}
		500	break;
		501
		502	case EIO_STATVFS:
		503	case EIO_FSTATVFS:
		504	{
		505	SV *rv = &PL_sv_undef;
		506
		507	#ifndef _WIN32
		508	if (req->result >= 0)
		509	{
		510	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		511	HV *hv = newHV ();
		512
		513	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		514
		515	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		516	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		517	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		518	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		519	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		520	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		521	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		522	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		523	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		524	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		525	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		526	}
		527	#endif
		528
		529	PUSHs (rv);
		530	}
		531
		532	break;
		533
		534	case EIO_GROUP:
		535	req->int1 = 2; /* mark group as finished */
		536
		537	if (req->sv1)
		538	{
		539	int i;
		540	AV *av = (AV *)req->sv1;
		541
		542	EXTEND (SP, AvFILL (av) + 1);
		543	for (i = 0; i <= AvFILL (av); ++i)
		544	PUSHs (*av_fetch (av, i, 0));
		545	}
		546	break;
		547
		548	case EIO_NOP:
		549	case EIO_BUSY:
		550	break;
		551
		552	case EIO_READLINK:
		553	case EIO_REALPATH:
		554	if (req->result > 0)
		555	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		556	break;
		557
		558	case EIO_STAT:
		559	case EIO_LSTAT:
		560	case EIO_FSTAT:
		561	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		562
		563	if (!(PL_laststatval = req->result))
		564	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		565	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		566
		567	PUSHs (sv_result);
		568	break;
		569
		570	case EIO_SEEK:
		571	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		572	break;
		573
		574	case EIO_READ:
		575	{
		576	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		577	*SvEND (req->sv2) = 0;
		578	SvPOK_only (req->sv2);
		579	SvSETMAGIC (req->sv2);
		580	PUSHs (sv_result);
		581	}
		582	break;
		583
		584	case EIO_CUSTOM:
		585	if (req->feed == fiemap)
		586	{
		587	#if HAVE_FIEMAP
		588	if (!req->result)
		589	{
		590	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		591
		592	if (fiemap->fm_extent_count)
		593	{
		594	AV *av = newAV ();
		595	int i;
		596
		597	while (fiemap->fm_mapped_extents)
		598	{
		599	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		600	AV *ext_av = newAV ();
		601
		602	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		603	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		604	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		605	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		606
		607	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		608	}
		609
		610	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		611	}
		612	else
		613	{
		614	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		615	PUSHs (sv_result);
		616	}
		617	}
		618	#endif
		619	}
		620	else
		621	PUSHs (sv_result);
		622	break;
		623
		624	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		625	if (req->result > 0)
		626	SvIV_set (sv_result, 0);
		627	/* FALLTHROUGH */
		628
		629	default:
		630	PUSHs (sv_result);
		631	break;
		632	}
		633
		634	errno = req->errorno;
		635
		636	PUTBACK;
		637	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		638	SPAGAIN;
		639
		640	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		641	SvREFCNT_dec (sv_result);
		642	else
		643	sv_result_cache = sv_result;
		644
		645	FREETMPS;
		646	LEAVE;
		647
		648	PUTBACK;
		649	}
		650
		651	return !!SvTRUE (ERRSV);
		652	}
		653
		654	static void
		655	req_destroy (aio_req req)
		656	{
238	if (req->self)	657	if (req->self)
239	{	658	{
240	sv_unmagic (req->self, PERL_MAGIC_ext);	659	sv_unmagic (req->self, PERL_MAGIC_ext);
241	SvREFCNT_dec (req->self);	660	SvREFCNT_dec (req->self);
242	}	661	}
243		662
244	if (req->data)
245	SvREFCNT_dec (req->data);
246
247	if (req->fh)
248	SvREFCNT_dec (req->fh);	663	SvREFCNT_dec (req->sv1);
249
250	if (req->fh2)
251	SvREFCNT_dec (req->fh2);	664	SvREFCNT_dec (req->sv2);
252		665	SvREFCNT_dec (req->sv3);
253	if (req->statdata)	666	SvREFCNT_dec (req->sv4);
254	Safefree (req->statdata);
255
256	if (req->callback)
257	SvREFCNT_dec (req->callback);	667	SvREFCNT_dec (req->callback);
258		668
259	if (req->type == REQ_READDIR && req->result >= 0)
260	free (req->data2ptr);
261
262	Safefree (req);	669	free (req);
263	}	670	}
264		671
265	static void req_cancel (aio_req req)	672	static void
		673	req_cancel_subs (aio_req grp)
266	{	674	{
267	req->cancelled = 1;
268
269	if (req->type == REQ_GROUP)	675	if (grp->type != EIO_GROUP)
		676	return;
		677
		678	SvREFCNT_dec (grp->sv2);
		679	grp->sv2 = 0;
		680
		681	eio_grp_cancel (grp);
		682	}
		683
		684	static void ecb_cold
		685	create_respipe (void)
		686	{
		687	if (s_epipe_renew (&respipe))
		688	croak ("IO::AIO: unable to initialize result pipe");
		689	}
		690
		691	static void
		692	poll_wait (void)
		693	{
		694	while (eio_nreqs ())
270	{	695	{
271	aio_req sub;	696	int size;
272		697
273	for (sub = req->grp_next; sub != req; sub = sub->grp_next)	698	X_LOCK (reslock);
274	req_cancel (sub);	699	size = res_queue.size;
		700	X_UNLOCK (reslock);
		701
		702	if (size)
		703	return;
		704
		705	etp_maybe_start_thread ();
		706
		707	s_epipe_wait (&respipe);
275	}	708	}
276	}	709	}
277		710
278	static int poll_cb ()	711	static int
		712	poll_cb (void)
279	{	713	{
280	dSP;
281	int count = 0;
282	int do_croak = 0;
283	aio_req req;
284
285	for (;;)	714	for (;;)
286	{	715	{
287	pthread_mutex_lock (&reslock);	716	int res = eio_poll ();
288	req = ress;
289		717
290	if (req)	718	if (res > 0)
		719	croak (0);
		720
		721	if (!max_outstanding || max_outstanding > eio_nreqs ())
		722	return res;
		723
		724	poll_wait ();
		725	}
		726	}
		727
		728	static void ecb_cold
		729	reinit (void)
		730	{
		731	create_respipe ();
		732
		733	if (eio_init (want_poll, done_poll) < 0)
		734	croak ("IO::AIO: unable to initialise eio library");
		735	}
		736
		737	/*****************************************************************************/
		738
		739	#if !_POSIX_MAPPED_FILES
		740	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		741	# define munmap(addr,length) EIO_ENOSYS ()
		742	#endif
		743
		744	#if !_POSIX_MEMORY_PROTECTION
		745	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		746	# define PROT_NONE 0
		747	# define PROT_WRITE 0
		748	# define MAP_PRIVATE 0
		749	# define MAP_SHARED 0
		750	# define MAP_FIXED 0
		751	#endif
		752
		753	#define MMAP_MAGIC PERL_MAGIC_ext
		754
		755	static int ecb_cold
		756	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		757	{
		758	int old_errno = errno;
		759	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		760	errno = old_errno;
		761
		762	mg->mg_obj = 0; /* just in case */
		763
		764	SvREADONLY_off (sv);
		765
		766	if (SvPVX (sv) != mg->mg_ptr)
		767	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		768
		769	SvCUR_set (sv, 0);
		770	SvPVX (sv) = 0;
		771	SvOK_off (sv);
		772
		773	return 0;
		774	}
		775
		776	static MGVTBL mmap_vtbl = {
		777	0, 0, 0, 0, mmap_free
		778	};
		779
		780	/*****************************************************************************/
		781
		782	static SV *
		783	get_cb (SV *cb_sv)
		784	{
		785	SvGETMAGIC (cb_sv);
		786	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		787	}
		788
		789	static aio_req ecb_noinline
		790	dreq (SV *callback)
		791	{
		792	SV *cb_cv;
		793	aio_req req;
		794	int req_pri = next_pri;
		795	next_pri = EIO_PRI_DEFAULT;
		796
		797	cb_cv = get_cb (callback);
		798
		799	req = calloc (sizeof (*req), 1);
		800	if (!req)
		801	croak ("out of memory during eio_req allocation");
		802
		803	req->callback = SvREFCNT_inc (cb_cv);
		804	req->pri = req_pri;
		805
		806	return req;
		807	}
		808
		809	#define dREQ \
		810	aio_req req = dreq (callback); \
		811
		812	#define REQ_SEND \
		813	PUTBACK; \
		814	req_submit (req); \
		815	SPAGAIN; \
		816	\
		817	if (GIMME_V != G_VOID) \
		818	XPUSHs (req_sv (req, aio_req_stash));
		819
		820	ecb_inline void
		821	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		822	{
		823	if (expect_false (SvROK (path)))
		824	{
		825	SV *rv = SvRV (path);
		826	SV *wdob;
		827
		828	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
291	{	829	{
292	ress = req->next;	830	path = AvARRAY (rv)[1];
		831	wdob = AvARRAY (rv)[0];
293		832
294	if (!ress)	833	if (SvOK (wdob))
295	{	834	{
296	/* read any signals sent by the worker threads */	835	*wd = SvAIO_WD (wdob);
297	char buf [32];	836	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
298	while (read (respipe [0], buf, 32) == 32)
299	;
300
301	rese = 0;
302	}	837	}
		838	else
		839	*wd = EIO_INVALID_WD;
303	}	840	}
304		841	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
305	pthread_mutex_unlock (&reslock);
306
307	if (!req)
308	break;
309
310	nreqs--;
311
312	if (req->type == REQ_QUIT)
313	started--;
314	else if (req->type == REQ_GROUP && req->grp_next != req)
315	{	842	{
316	req->fd = 1; /* mark request as delayed */	843	*wd = (aio_wd)(long)SvIVX (rv);
317	continue;	844	*wdsv = SvREFCNT_inc_NN (rv);
		845	*ptr = ".";
		846	return; /* path set to "." */
318	}	847	}
319	else	848	else
320	{	849	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
321	if (req->type == REQ_READ)
322	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
323
324	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
325	SvREADONLY_off (req->data);
326
327	if (req->statdata)
328	{
329	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
330	PL_laststatval = req->result;
331	PL_statcache = *(req->statdata);
332	}
333
334	req_invoke (req);
335
336	count++;
337	}
338
339	req_free (req);
340	}	850	}
341		851
342	return count;	852	*pathsv = newSVsv (path);
		853	*ptr = SvPVbyte_nolen (*pathsv);
343	}	854	}
344		855
345	static void *aio_proc(void *arg);	856	static void ecb_noinline
346		857	req_set_path1 (aio_req req, SV *path)
347	static void start_thread (void)
348	{	858	{
349	sigset_t fullsigset, oldsigset;	859	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
350	pthread_t tid;
351	pthread_attr_t attr;
352
353	pthread_attr_init (&attr);
354	pthread_attr_setstacksize (&attr, STACKSIZE);
355	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
356
357	sigfillset (&fullsigset);
358	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
359
360	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
361	started++;
362
363	sigprocmask (SIG_SETMASK, &oldsigset, 0);
364	}	860	}
365		861
366	static void req_send (aio_req req)	862	static void ecb_noinline
		863	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
367	{	864	{
368	while (started < wanted && nreqs >= started)	865	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
369	start_thread ();
370		866
371	nreqs++;	867	switch (SvTYPE (rv))
372
373	pthread_mutex_lock (&reqlock);
374
375	req->next = 0;
376
377	if (reqe)
378	{	868	{
379	reqe->next = req;	869	case SVt_PVIO:
380	reqe = req;	870	case SVt_PVLV:
		871	case SVt_PVGV:
		872	req->type = type_fh;
		873	req->sv1 = newSVsv (fh_or_path);
		874	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		875	break;
		876
		877	default:
		878	req->type = type_path;
		879	req_set_path1 (req, fh_or_path);
		880	break;
381	}	881	}
382	else
383	reqe = reqs = req;
384
385	pthread_cond_signal (&reqwait);
386	pthread_mutex_unlock (&reqlock);
387
388	if (nreqs > max_outstanding)
389	for (;;)
390	{
391	poll_cb ();
392
393	if (nreqs <= max_outstanding)
394	break;
395
396	poll_wait ();
397	}
398	}	882	}
399		883
400	static void end_thread (void)	884	XS(boot_IO__AIO) ecb_cold;
401	{
402	aio_req req;
403	Newz (0, req, 1, aio_cb);
404	req->type = REQ_QUIT;
405		885
406	req_send (req);	886	MODULE = IO::AIO PACKAGE = IO::AIO
407	}
408		887
409	static void min_parallel (int nthreads)	888	PROTOTYPES: ENABLE
410	{
411	if (wanted < nthreads)
412	wanted = nthreads;
413	}
414		889
415	static void max_parallel (int nthreads)	890	BOOT:
416	{	891	{
417	int cur = started;	892	static const struct {
		893	const char *name;
		894	IV iv;
		895	} *civ, const_iv[] = {
		896	# define const_niv(name, value) { # name, (IV) value },
		897	# define const_iv(name) { # name, (IV) name },
		898	# define const_eio(name) { # name, (IV) EIO_ ## name },
418		899
419	if (wanted > nthreads)	900	/* you have to re-run ./gendef0 after adding/Removing any constants here */
420	wanted = nthreads;
421		901
422	while (cur > wanted)	902	const_iv (ENOSYS)
423	{	903	const_iv (EXDEV)
424	end_thread ();	904	const_iv (EBADR)
425	cur--;
426	}
427		905
428	while (started > wanted)	906	const_iv (O_RDONLY)
429	{	907	const_iv (O_WRONLY)
430	poll_wait ();	908	const_iv (O_RDWR)
431	poll_cb ();	909	const_iv (O_CREAT)
432	}	910	const_iv (O_TRUNC)
433	}	911	const_iv (O_EXCL)
		912	const_iv (O_APPEND)
434		913
435	static void create_pipe ()	914	const_iv (O_ASYNC)
436	{	915	const_iv (O_DIRECT)
437	if (pipe (respipe))	916	const_iv (O_NOATIME)
438	croak ("unable to initialize result pipe");
439		917
440	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	918	const_iv (O_CLOEXEC)
441	croak ("cannot set result pipe to nonblocking mode");	919	const_iv (O_NOCTTY)
		920	const_iv (O_NOFOLLOW)
		921	const_iv (O_NONBLOCK)
		922	const_iv (O_EXEC)
		923	const_iv (O_SEARCH)
		924	const_iv (O_DIRECTORY)
		925	const_iv (O_DSYNC)
		926	const_iv (O_RSYNC)
		927	const_iv (O_SYNC)
		928	const_iv (O_TTY_INIT)
442		929
443	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	930	const_iv (S_IFIFO)
444	croak ("cannot set result pipe to nonblocking mode");	931	const_iv (S_IFCHR)
445	}	932	const_iv (S_IFBLK)
		933	const_iv (S_IFLNK)
		934	const_iv (S_IFREG)
		935	const_iv (S_IFDIR)
		936	const_iv (S_IFWHT)
		937	const_iv (S_IFSOCK)
		938	const_iv (S_IFMT)
446		939
447	/*****************************************************************************/	940	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
448	/* work around various missing functions */	941	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		942	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		943	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		944	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		945	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
449		946
450	#if !HAVE_PREADWRITE	947	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
451	# define pread aio_pread	948	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
452	# define pwrite aio_pwrite	949	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		950	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		951	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
453		952
454	/*	953	const_iv (ST_RDONLY)
455	* make our pread/pwrite safe against themselves, but not against	954	const_iv (ST_NOSUID)
456	* normal read/write by using a mutex. slows down execution a lot,	955	const_iv (ST_NODEV)
457	* but that's your problem, not mine.	956	const_iv (ST_NOEXEC)
458	*/	957	const_iv (ST_SYNCHRONOUS)
459	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	958	const_iv (ST_MANDLOCK)
		959	const_iv (ST_WRITE)
		960	const_iv (ST_APPEND)
		961	const_iv (ST_IMMUTABLE)
		962	const_iv (ST_NOATIME)
		963	const_iv (ST_NODIRATIME)
		964	const_iv (ST_RELATIME)
460		965
461	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	966	const_iv (PROT_NONE)
462	{	967	const_iv (PROT_EXEC)
463	ssize_t res;	968	const_iv (PROT_READ)
464	off_t ooffset;	969	const_iv (PROT_WRITE)
465		970
466	pthread_mutex_lock (&preadwritelock);	971	/*const_iv (MAP_FIXED)*/
467	ooffset = lseek (fd, 0, SEEK_CUR);	972	const_iv (MAP_PRIVATE)
468	lseek (fd, offset, SEEK_SET);	973	const_iv (MAP_SHARED)
469	res = read (fd, buf, count);	974	const_iv (MAP_ANONYMOUS)
470	lseek (fd, ooffset, SEEK_SET);
471	pthread_mutex_unlock (&preadwritelock);
472		975
473	return res;	976	/* linuxish */
474	}	977	const_iv (MAP_HUGETLB)
		978	const_iv (MAP_LOCKED)
		979	const_iv (MAP_NORESERVE)
		980	const_iv (MAP_POPULATE)
		981	const_iv (MAP_NONBLOCK)
475		982
476	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	983	const_iv (FIEMAP_FLAG_SYNC)
477	{	984	const_iv (FIEMAP_FLAG_XATTR)
478	ssize_t res;	985	const_iv (FIEMAP_FLAGS_COMPAT)
479	off_t ooffset;	986	const_iv (FIEMAP_EXTENT_LAST)
		987	const_iv (FIEMAP_EXTENT_UNKNOWN)
		988	const_iv (FIEMAP_EXTENT_DELALLOC)
		989	const_iv (FIEMAP_EXTENT_ENCODED)
		990	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		991	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		992	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		993	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		994	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		995	const_iv (FIEMAP_EXTENT_MERGED)
		996	const_iv (FIEMAP_EXTENT_SHARED)
480		997
481	pthread_mutex_lock (&preadwritelock);	998	const_iv (SPLICE_F_MOVE)
482	ooffset = lseek (fd, 0, SEEK_CUR);	999	const_iv (SPLICE_F_NONBLOCK)
483	lseek (fd, offset, SEEK_SET);	1000	const_iv (SPLICE_F_MORE)
484	res = write (fd, buf, count);	1001	const_iv (SPLICE_F_GIFT)
485	lseek (fd, offset, SEEK_SET);
486	pthread_mutex_unlock (&preadwritelock);
487		1002
488	return res;	1003	const_iv (SEEK_DATA)
489	}	1004	const_iv (SEEK_HOLE)
490	#endif
491		1005
492	#if !HAVE_FDATASYNC	1006	/* libeio constants */
493	# define fdatasync fsync	1007	const_eio (SEEK_SET)
494	#endif	1008	const_eio (SEEK_CUR)
		1009	const_eio (SEEK_END)
495		1010
496	#if !HAVE_READAHEAD	1011	const_eio (MCL_FUTURE)
497	# define readahead aio_readahead	1012	const_eio (MCL_CURRENT)
498		1013
499	static ssize_t readahead (int fd, off_t offset, size_t count)	1014	const_eio (MS_ASYNC)
500	{	1015	const_eio (MS_INVALIDATE)
501	char readahead_buf[4096];	1016	const_eio (MS_SYNC)
502		1017
503	while (count > 0)	1018	const_eio (MT_MODIFY)
504	{
505	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
506		1019
507	pread (fd, readahead_buf, len, offset);	1020	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
508	offset += len;	1021	const_eio (SYNC_FILE_RANGE_WRITE)
509	count -= len;	1022	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
510	}
511		1023
512	errno = 0;	1024	const_eio (FALLOC_FL_KEEP_SIZE)
513	}	1025	const_eio (FALLOC_FL_PUNCH_HOLE)
514	#endif
515		1026
516	#if !HAVE_READDIR_R	1027	const_eio (READDIR_DENTS)
517	# define readdir_r aio_readdir_r	1028	const_eio (READDIR_DIRS_FIRST)
		1029	const_eio (READDIR_STAT_ORDER)
		1030	const_eio (READDIR_FOUND_UNKNOWN)
518		1031
519	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	1032	const_eio (DT_UNKNOWN)
520		1033	const_eio (DT_FIFO)
521	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	1034	const_eio (DT_CHR)
522	{	1035	const_eio (DT_DIR)
523	struct dirent *e;	1036	const_eio (DT_BLK)
524	int errorno;	1037	const_eio (DT_REG)
525		1038	const_eio (DT_LNK)
526	pthread_mutex_lock (&readdirlock);	1039	const_eio (DT_SOCK)
527		1040	const_eio (DT_WHT)
528	e = readdir (dirp);
529	errorno = errno;
530
531	if (e)
532	{
533	*res = ent;
534	strcpy (ent->d_name, e->d_name);
535	}
536	else
537	*res = 0;
538
539	pthread_mutex_unlock (&readdirlock);
540
541	errno = errorno;
542	return e ? 0 : -1;
543	}
544	#endif
545
546	/* sendfile always needs emulation */
547	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
548	{
549	ssize_t res;
550
551	if (!count)
552	return 0;
553
554	#if HAVE_SENDFILE
555	# if __linux
556	res = sendfile (ofd, ifd, &offset, count);
557
558	# elif __freebsd
559	/*
560	* Of course, the freebsd sendfile is a dire hack with no thoughts
561	* wasted on making it similar to other I/O functions.
562	*/
563	{
564	off_t sbytes;
565	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
566
567	if (res < 0 && sbytes)
568	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
569	res = sbytes;
570	}	1041	};
571		1042
572	# elif __hpux	1043	aio_stash = gv_stashpv ("IO::AIO" , 1);
573	res = sendfile (ofd, ifd, offset, count, 0, 0);	1044	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1045	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1046	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
574		1047
575	# elif __solaris	1048	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
576	{	1049	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
577	struct sendfilevec vec;
578	size_t sbytes;
579		1050
580	vec.sfv_fd = ifd;	1051	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
581	vec.sfv_flag = 0;
582	vec.sfv_off = offset;
583	vec.sfv_len = count;
584		1052
585	res = sendfilev (ofd, &vec, 1, &sbytes);	1053	reinit ();
		1054	}
586		1055
587	if (res < 0 && sbytes)	1056	void
		1057	reinit ()
		1058	PROTOTYPE:
		1059
		1060	void
		1061	max_poll_reqs (unsigned int nreqs)
		1062	PROTOTYPE: $
		1063	CODE:
		1064	eio_set_max_poll_reqs (nreqs);
		1065
		1066	void
		1067	max_poll_time (double nseconds)
		1068	PROTOTYPE: $
		1069	CODE:
		1070	eio_set_max_poll_time (nseconds);
		1071
		1072	void
		1073	min_parallel (unsigned int nthreads)
		1074	PROTOTYPE: $
		1075	CODE:
		1076	eio_set_min_parallel (nthreads);
		1077
		1078	void
		1079	max_parallel (unsigned int nthreads)
		1080	PROTOTYPE: $
		1081	CODE:
		1082	eio_set_max_parallel (nthreads);
		1083
		1084	void
		1085	max_idle (unsigned int nthreads)
		1086	PROTOTYPE: $
		1087	CODE:
		1088	eio_set_max_idle (nthreads);
		1089
		1090	void
		1091	idle_timeout (unsigned int seconds)
		1092	PROTOTYPE: $
		1093	CODE:
		1094	eio_set_idle_timeout (seconds);
		1095
		1096	void
		1097	max_outstanding (unsigned int maxreqs)
		1098	PROTOTYPE: $
		1099	CODE:
		1100	max_outstanding = maxreqs;
		1101
		1102	void
		1103	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1104	PPCODE:
		1105	{
		1106	dREQ;
		1107
		1108	req->type = EIO_WD_OPEN;
		1109	req_set_path1 (req, pathname);
		1110
		1111	REQ_SEND;
		1112	}
		1113
		1114	void
		1115	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1116	PPCODE:
		1117	{
		1118	dREQ;
		1119
		1120	req->type = EIO_OPEN;
		1121	req_set_path1 (req, pathname);
		1122	req->int1 = flags;
		1123	req->int2 = mode;
		1124
		1125	REQ_SEND;
		1126	}
		1127
		1128	void
		1129	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1130	ALIAS:
		1131	aio_fsync = EIO_FSYNC
		1132	aio_fdatasync = EIO_FDATASYNC
		1133	aio_syncfs = EIO_SYNCFS
		1134	PPCODE:
		1135	{
		1136	int fd = s_fileno_croak (fh, 0);
		1137	dREQ;
		1138
		1139	req->type = ix;
		1140	req->sv1 = newSVsv (fh);
		1141	req->int1 = fd;
		1142
		1143	REQ_SEND;
		1144	}
		1145
		1146	void
		1147	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1148	PPCODE:
		1149	{
		1150	int fd = s_fileno_croak (fh, 0);
		1151	dREQ;
		1152
		1153	req->type = EIO_SYNC_FILE_RANGE;
		1154	req->sv1 = newSVsv (fh);
		1155	req->int1 = fd;
		1156	req->offs = offset;
588	res = sbytes;	1157	req->size = nbytes;
589	}	1158	req->int2 = flags;
590		1159
591	# endif	1160	REQ_SEND;
		1161	}
		1162
		1163	void
		1164	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1165	PPCODE:
		1166	{
		1167	int fd = s_fileno_croak (fh, 0);
		1168	dREQ;
		1169
		1170	req->type = EIO_FALLOCATE;
		1171	req->sv1 = newSVsv (fh);
		1172	req->int1 = fd;
		1173	req->int2 = mode;
		1174	req->offs = offset;
		1175	req->size = len;
		1176
		1177	REQ_SEND;
		1178	}
		1179
		1180	void
		1181	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1182	PPCODE:
		1183	{
		1184	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1185	int fd = s_fileno_croak (fh, 0);
		1186	dREQ;
		1187
		1188	if (expect_false (close_fd < 0))
		1189	{
		1190	int pipefd [2];
		1191
		1192	if (
		1193	#ifdef _WIN32
		1194	_pipe (pipefd, 1, _O_BINARY) < 0
592	#else	1195	#else
593	res = -1;	1196	pipe (pipefd) < 0
594	errno = ENOSYS;	1197	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
595	#endif	1198	#endif
596		1199	|| close (pipefd [1]) < 0
597	if (res < 0
598	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
599	#if __solaris
600	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
601	#endif
602	)
603	)
604	{
605	/* emulate sendfile. this is a major pain in the ass */
606	char buf[4096];
607	res = 0;
608
609	while (count)
610	{
611	ssize_t cnt;
612
613	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
614
615	if (cnt <= 0)
616	{	1200	)
617	if (cnt && !res) res = -1;	1201	abort (); /*D*/
618	break;
619	}
620		1202
621	cnt = write (ofd, buf, cnt);	1203	close_fd = pipefd [0];
622
623	if (cnt <= 0)
624	{
625	if (cnt && !res) res = -1;
626	break;
627	}
628
629	offset += cnt;
630	res += cnt;
631	count -= cnt;
632	}
633	}
634
635	return res;
636	}
637
638	/* read a full directory */
639	static int scandir_ (const char *path, void **namesp)
640	{
641	DIR *dirp = opendir (path);
642	union
643	{
644	struct dirent d;
645	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
646	} u;
647	struct dirent *entp;
648	char *name, *names;
649	int memlen = 4096;
650	int memofs = 0;
651	int res = 0;
652	int errorno;
653
654	if (!dirp)
655	return -1;
656
657	names = malloc (memlen);
658
659	for (;;)
660	{
661	errno = 0, readdir_r (dirp, &u.d, &entp);
662
663	if (!entp)
664	break;
665
666	name = entp->d_name;
667
668	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
669	{
670	int len = strlen (name) + 1;
671
672	res++;
673
674	while (memofs + len > memlen)
675	{
676	memlen *= 2;
677	names = realloc (names, memlen);
678	if (!names)
679	break;
680	}
681
682	memcpy (names + memofs, name, len);
683	memofs += len;
684	}
685	}
686
687	errorno = errno;
688	closedir (dirp);
689
690	if (errorno)
691	{
692	free (names);
693	errno = errorno;
694	res = -1;
695	}
696
697	*namesp = (void *)names;
698	return res;
699	}
700
701	/*****************************************************************************/
702
703	static void *aio_proc (void *thr_arg)
704	{
705	aio_req req;
706	int type;
707
708	do
709	{
710	pthread_mutex_lock (&reqlock);
711
712	for (;;)
713	{
714	req = reqs;
715
716	if (reqs)
717	{
718	reqs = reqs->next;
719	if (!reqs) reqe = 0;
720	}
721
722	if (req)
723	break;
724
725	pthread_cond_wait (&reqwait, &reqlock);
726	}
727
728	pthread_mutex_unlock (&reqlock);
729
730	errno = 0; /* strictly unnecessary */
731
732	if (!req->cancelled)
733	switch (req->type)
734	{
735	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
736	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
737
738	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
739	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
740
741	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
742	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
743	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
744
745	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
746	case REQ_CLOSE: req->result = close (req->fd); break;
747	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
748	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
749	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
750	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
751	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
752
753	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
754	case REQ_FSYNC: req->result = fsync (req->fd); break;
755	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
756
757	case REQ_SLEEP:
758	{
759	struct timeval tv;
760
761	tv.tv_sec = req->fd;
762	tv.tv_usec = req->fd2;
763
764	req->result = select (0, 0, 0, 0, &tv);
765	}
766
767	case REQ_QUIT:
768	break;
769
770	default:
771	req->result = ENOSYS;
772	break;
773	}	1204	}
774		1205
775	req->errorno = errno;	1206	req->type = EIO_DUP2;
776		1207	req->int1 = close_fd;
777	pthread_mutex_lock (&reslock);	1208	req->sv2 = newSVsv (fh);
778
779	req->next = 0;	1209	req->int2 = fd;
780		1210
781	if (rese)	1211	REQ_SEND;
782	{
783	rese->next = req;
784	rese = req;
785	}
786	else
787	{
788	rese = ress = req;
789
790	/* write a dummy byte to the pipe so fh becomes ready */
791	write (respipe [1], &respipe, 1);
792	}
793
794	pthread_mutex_unlock (&reslock);
795	}
796	while (type != REQ_QUIT);
797
798	return 0;
799	}	1212	}
800		1213
801	/*****************************************************************************/
802
803	static void atfork_prepare (void)
804	{
805	pthread_mutex_lock (&reqlock);
806	pthread_mutex_lock (&reslock);
807	#if !HAVE_PREADWRITE
808	pthread_mutex_lock (&preadwritelock);
809	#endif
810	#if !HAVE_READDIR_R
811	pthread_mutex_lock (&readdirlock);
812	#endif
813	}
814
815	static void atfork_parent (void)
816	{
817	#if !HAVE_READDIR_R
818	pthread_mutex_unlock (&readdirlock);
819	#endif
820	#if !HAVE_PREADWRITE
821	pthread_mutex_unlock (&preadwritelock);
822	#endif
823	pthread_mutex_unlock (&reslock);
824	pthread_mutex_unlock (&reqlock);
825	}
826
827	static void atfork_child (void)
828	{
829	aio_req prv;
830
831	started = 0;
832
833	while (reqs)
834	{
835	prv = reqs;
836	reqs = prv->next;
837	req_free (prv);
838	}
839
840	reqs = reqe = 0;
841
842	while (ress)
843	{
844	prv = ress;
845	ress = prv->next;
846	req_free (prv);
847	}
848
849	ress = rese = 0;
850
851	close (respipe [0]);
852	close (respipe [1]);
853	create_pipe ();
854
855	atfork_parent ();
856	}
857
858	#define dREQ \
859	aio_req req; \
860	\
861	if (SvOK (callback) && !SvROK (callback)) \
862	croak ("callback must be undef or of reference type"); \
863	\
864	Newz (0, req, 1, aio_cb); \
865	if (!req) \
866	croak ("out of memory during aio_req allocation"); \
867	\
868	req->callback = newSVsv (callback)
869
870	#define REQ_SEND \
871	req_send (req); \
872	\
873	if (GIMME_V != G_VOID) \
874	XPUSHs (req_sv (req, AIO_REQ_KLASS));
875
876	MODULE = IO::AIO PACKAGE = IO::AIO
877
878	PROTOTYPES: ENABLE
879
880	BOOT:
881	{
882	HV *stash = gv_stashpv ("IO::AIO", 1);
883	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
884	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
885	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
886
887	create_pipe ();
888	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
889	}
890
891	void	1214	void
892	min_parallel (nthreads)	1215	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
893	int nthreads
894	PROTOTYPE: $
895
896	void
897	max_parallel (nthreads)
898	int nthreads
899	PROTOTYPE: $
900
901	int
902	max_outstanding (nreqs)
903	int nreqs
904	PROTOTYPE: $
905	CODE:	1216	PPCODE:
906	RETVAL = max_outstanding;
907	max_outstanding = nreqs;
908
909	void
910	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
911	SV * pathname
912	int flags
913	int mode
914	SV * callback
915	PROTOTYPE: $$$;$
916	PPCODE:
917	{	1217	{
		1218	int fd = s_fileno_croak (fh, 0);
918	dREQ;	1219	dREQ;
919		1220
920	req->type = REQ_OPEN;	1221	req->type = EIO_SEEK;
921	req->data = newSVsv (pathname);	1222	req->sv1 = newSVsv (fh);
922	req->dataptr = SvPVbyte_nolen (req->data);	1223	req->int1 = fd;
923	req->fd = flags;	1224	req->offs = SvVAL64 (offset);
924	req->mode = mode;	1225	req->int2 = whence;
925		1226
926	REQ_SEND;	1227	REQ_SEND;
927	}	1228	}
928		1229
929	void	1230	void
930	aio_close (fh,callback=&PL_sv_undef)	1231	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
931	SV * fh
932	SV * callback
933	PROTOTYPE: $;$
934	ALIAS:	1232	ALIAS:
935	aio_close = REQ_CLOSE
936	aio_fsync = REQ_FSYNC
937	aio_fdatasync = REQ_FDATASYNC
938	PPCODE:
939	{
940	dREQ;
941
942	req->type = ix;
943	req->fh = newSVsv (fh);
944	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
945
946	REQ_SEND (req);
947	}
948
949	void
950	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
951	SV * fh
952	UV offset
953	UV length
954	SV * data
955	UV dataoffset
956	SV * callback
957	ALIAS:
958	aio_read = REQ_READ	1233	aio_read = EIO_READ
959	aio_write = REQ_WRITE	1234	aio_write = EIO_WRITE
960	PROTOTYPE: $$$$$;$
961	PPCODE:	1235	PPCODE:
962	{	1236	{
963	aio_req req;
964	STRLEN svlen;	1237	STRLEN svlen;
		1238	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
965	char *svptr = SvPVbyte (data, svlen);	1239	char *svptr = SvPVbyte (data, svlen);
966		1240	UV len = SvUV (length);
967	SvUPGRADE (data, SVt_PV);
968	SvPOK_on (data);
969		1241
970	if (dataoffset < 0)	1242	if (dataoffset < 0)
971	dataoffset += svlen;	1243	dataoffset += svlen;
972		1244
973	if (dataoffset < 0 || dataoffset > svlen)	1245	if (dataoffset < 0 || dataoffset > svlen)
974	croak ("data offset outside of string");	1246	croak ("dataoffset outside of data scalar");
975		1247
976	if (ix == REQ_WRITE)	1248	if (ix == EIO_WRITE)
977	{	1249	{
978	/* write: check length and adjust. */	1250	/* write: check length and adjust. */
979	if (length < 0 || length + dataoffset > svlen)	1251	if (!SvOK (length) || len + dataoffset > svlen)
980	length = svlen - dataoffset;	1252	len = svlen - dataoffset;
981	}	1253	}
982	else	1254	else
983	{	1255	{
984	/* read: grow scalar as necessary */	1256	/* read: check type and grow scalar as necessary */
		1257	SvUPGRADE (data, SVt_PV);
		1258	if (SvLEN (data) >= SvCUR (data))
985	svptr = SvGROW (data, length + dataoffset);	1259	svptr = SvGROW (data, len + dataoffset + 1);
		1260	else if (SvCUR (data) < len + dataoffset)
		1261	croak ("length + dataoffset outside of scalar, and cannot grow");
986	}	1262	}
987
988	if (length < 0)
989	croak ("length must not be negative");
990		1263
991	{	1264	{
992	dREQ;	1265	dREQ;
993		1266
994	req->type = ix;	1267	req->type = ix;
995	req->fh = newSVsv (fh);	1268	req->sv1 = newSVsv (fh);
996	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1269	req->int1 = fd;
997	: IoOFP (sv_2io (fh)));	1270	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
998	req->offset = offset;	1271	req->size = len;
999	req->length = length;
1000	req->data = SvREFCNT_inc (data);	1272	req->sv2 = SvREFCNT_inc (data);
1001	req->dataptr = (char *)svptr + dataoffset;	1273	req->ptr2 = (char *)svptr + dataoffset;
		1274	req->stroffset = dataoffset;
1002		1275
1003	if (!SvREADONLY (data))	1276	if (!SvREADONLY (data))
1004	{	1277	{
1005	SvREADONLY_on (data);	1278	SvREADONLY_on (data);
1006	req->data2ptr = (void *)data;	1279	req->flags |= FLAG_SV2_RO_OFF;
1007	}	1280	}
1008		1281
1009	REQ_SEND;	1282	REQ_SEND;
1010	}	1283	}
1011	}	1284	}
1012		1285
1013	void	1286	void
1014	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1287	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1015	SV * out_fh	1288	ALIAS:
1016	SV * in_fh	1289	aio_readlink = EIO_READLINK
1017	UV in_offset	1290	aio_realpath = EIO_REALPATH
1018	UV length
1019	SV * callback
1020	PROTOTYPE: $$$$;$
1021	PPCODE:	1291	PPCODE:
1022	{	1292	{
		1293	dREQ;
		1294
		1295	req->type = ix;
		1296	req_set_path1 (req, pathname);
		1297
		1298	REQ_SEND;
		1299	}
		1300
		1301	void
		1302	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1303	PPCODE:
		1304	{
		1305	int ifd = s_fileno_croak (in_fh , 0);
		1306	int ofd = s_fileno_croak (out_fh, 1);
1023	dREQ;	1307	dREQ;
1024		1308
1025	req->type = REQ_SENDFILE;	1309	req->type = EIO_SENDFILE;
1026	req->fh = newSVsv (out_fh);	1310	req->sv1 = newSVsv (out_fh);
1027	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1311	req->int1 = ofd;
1028	req->fh2 = newSVsv (in_fh);	1312	req->sv2 = newSVsv (in_fh);
1029	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1313	req->int2 = ifd;
1030	req->offset = in_offset;	1314	req->offs = in_offset;
1031	req->length = length;	1315	req->size = length;
1032		1316
1033	REQ_SEND;	1317	REQ_SEND;
1034	}	1318	}
1035		1319
1036	void	1320	void
1037	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1321	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1038	SV * fh
1039	UV offset
1040	IV length
1041	SV * callback
1042	PROTOTYPE: $$$;$
1043	PPCODE:	1322	PPCODE:
1044	{	1323	{
		1324	int fd = s_fileno_croak (fh, 0);
1045	dREQ;	1325	dREQ;
1046		1326
1047	req->type = REQ_READAHEAD;	1327	req->type = EIO_READAHEAD;
1048	req->fh = newSVsv (fh);	1328	req->sv1 = newSVsv (fh);
1049	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1329	req->int1 = fd;
1050	req->offset = offset;	1330	req->offs = offset;
1051	req->length = length;	1331	req->size = length;
1052		1332
1053	REQ_SEND;	1333	REQ_SEND;
1054	}	1334	}
1055		1335
1056	void	1336	void
1057	aio_stat (fh_or_path,callback=&PL_sv_undef)	1337	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1058	SV * fh_or_path
1059	SV * callback
1060	ALIAS:	1338	ALIAS:
1061	aio_stat = REQ_STAT	1339	aio_stat = EIO_STAT
1062	aio_lstat = REQ_LSTAT	1340	aio_lstat = EIO_LSTAT
		1341	aio_statvfs = EIO_STATVFS
1063	PPCODE:	1342	PPCODE:
1064	{	1343	{
1065	dREQ;	1344	dREQ;
1066		1345
1067	New (0, req->statdata, 1, Stat_t);	1346	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1068	if (!req->statdata)
1069	{
1070	req_free (req);
1071	croak ("out of memory during aio_req->statdata allocation");
1072	}
1073
1074	if (SvPOK (fh_or_path))
1075	{
1076	req->type = ix;
1077	req->data = newSVsv (fh_or_path);
1078	req->dataptr = SvPVbyte_nolen (req->data);
1079	}
1080	else
1081	{
1082	req->type = REQ_FSTAT;
1083	req->fh = newSVsv (fh_or_path);
1084	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1085	}
1086		1347
1087	REQ_SEND;	1348	REQ_SEND;
1088	}	1349	}
1089		1350
		1351	UV
		1352	major (UV dev)
		1353	ALIAS:
		1354	minor = 1
		1355	CODE:
		1356	RETVAL = ix ? major (dev) : minor (dev);
		1357	OUTPUT:
		1358	RETVAL
		1359
		1360	UV
		1361	makedev (UV maj, UV min)
		1362	CODE:
		1363	RETVAL = makedev (maj, min);
		1364	OUTPUT:
		1365	RETVAL
		1366
1090	void	1367	void
		1368	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1369	PPCODE:
		1370	{
		1371	dREQ;
		1372
		1373	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1374	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1375	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1376
		1377	REQ_SEND;
		1378	}
		1379
		1380	void
		1381	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1382	PPCODE:
		1383	{
		1384	dREQ;
		1385
		1386	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1387	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1388
		1389	REQ_SEND;
		1390	}
		1391
		1392	void
		1393	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1394	PPCODE:
		1395	{
		1396	dREQ;
		1397
		1398	req->int2 = mode;
		1399	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1400
		1401	REQ_SEND;
		1402	}
		1403
		1404	void
		1405	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1406	PPCODE:
		1407	{
		1408	dREQ;
		1409
		1410	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1411	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1412	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1413
		1414	REQ_SEND;
		1415	}
		1416
		1417	void
		1418	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1419	PPCODE:
		1420	{
		1421	dREQ;
		1422
		1423	req->type = EIO_READDIR;
		1424	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1425
		1426	if (flags & EIO_READDIR_DENTS)
		1427	req->int1 |= EIO_READDIR_CUSTOM2;
		1428
		1429	req_set_path1 (req, pathname);
		1430
		1431	REQ_SEND;
		1432	}
		1433
		1434	void
		1435	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1436	PPCODE:
		1437	{
		1438	dREQ;
		1439
		1440	req->type = EIO_MKDIR;
		1441	req->int2 = mode;
		1442	req_set_path1 (req, pathname);
		1443
		1444	REQ_SEND;
		1445	}
		1446
		1447	void
1091	aio_unlink (pathname,callback=&PL_sv_undef)	1448	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1092	SV * pathname
1093	SV * callback
1094	ALIAS:	1449	ALIAS:
1095	aio_unlink = REQ_UNLINK	1450	aio_unlink = EIO_UNLINK
1096	aio_rmdir = REQ_RMDIR	1451	aio_rmdir = EIO_RMDIR
1097	aio_readdir = REQ_READDIR	1452	aio_readdir = EIO_READDIR
1098	PPCODE:	1453	PPCODE:
1099	{	1454	{
1100	dREQ;	1455	dREQ;
1101		1456
1102	req->type = ix;	1457	req->type = ix;
1103	req->data = newSVsv (pathname);	1458	req_set_path1 (req, pathname);
1104	req->dataptr = SvPVbyte_nolen (req->data);	1459
1105
1106	REQ_SEND;	1460	REQ_SEND;
1107	}	1461	}
1108		1462
1109	void	1463	void
1110	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1464	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1111	SV * oldpath
1112	SV * newpath
1113	SV * callback
1114	ALIAS:	1465	ALIAS:
1115	aio_link = REQ_LINK	1466	aio_link = EIO_LINK
1116	aio_symlink = REQ_SYMLINK	1467	aio_symlink = EIO_SYMLINK
1117	aio_rename = REQ_RENAME	1468	aio_rename = EIO_RENAME
1118	PPCODE:	1469	PPCODE:
1119	{	1470	{
		1471	eio_wd wd2 = 0;
1120	dREQ;	1472	dREQ;
1121		1473
1122	req->type = ix;	1474	req->type = ix;
1123	req->fh = newSVsv (oldpath);	1475	req_set_path1 (req, oldpath);
1124	req->data2ptr = SvPVbyte_nolen (req->fh);	1476	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1125	req->data = newSVsv (newpath);	1477	req->int3 = (long)wd2;
1126	req->dataptr = SvPVbyte_nolen (req->data);
1127		1478
1128	REQ_SEND;	1479	REQ_SEND;
1129	}	1480	}
1130		1481
1131	void	1482	void
1132	aio_sleep (delay,callback=&PL_sv_undef)	1483	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1133	double delay
1134	SV * callback
1135	PPCODE:	1484	PPCODE:
1136	{	1485	{
1137	dREQ;	1486	dREQ;
1138		1487
1139	req->type = REQ_SLEEP;	1488	req->type = EIO_MKNOD;
1140	req->fd = delay < 0. ? 0 : delay;	1489	req->int2 = (mode_t)mode;
1141	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1490	req->offs = dev;
1142		1491	req_set_path1 (req, pathname);
		1492
1143	REQ_SEND;	1493	REQ_SEND;
1144	}	1494	}
1145		1495
1146	void	1496	void
1147	aio_group (callback=&PL_sv_undef)	1497	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1148	SV * callback	1498	ALIAS:
1149	PROTOTYPE: ;$	1499	aio_mtouch = EIO_MTOUCH
		1500	aio_msync = EIO_MSYNC
1150	PPCODE:	1501	PPCODE:
1151	{	1502	{
		1503	STRLEN svlen;
		1504	char *svptr = SvPVbyte (data, svlen);
		1505	UV len = SvUV (length);
		1506
		1507	if (offset < 0)
		1508	offset += svlen;
		1509
		1510	if (offset < 0 || offset > svlen)
		1511	croak ("offset outside of scalar");
		1512
		1513	if (!SvOK (length) || len + offset > svlen)
		1514	len = svlen - offset;
		1515
		1516	{
		1517	dREQ;
		1518
		1519	req->type = ix;
		1520	req->sv2 = SvREFCNT_inc (data);
		1521	req->ptr2 = (char *)svptr + offset;
		1522	req->size = len;
		1523	req->int1 = flags;
		1524
		1525	REQ_SEND;
		1526	}
		1527	}
		1528
		1529	void
		1530	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1531	PPCODE:
		1532	{
		1533	STRLEN svlen;
		1534	char *svptr = SvPVbyte (data, svlen);
		1535	UV len = SvUV (length);
		1536
		1537	if (offset < 0)
		1538	offset += svlen;
		1539
		1540	if (offset < 0 || offset > svlen)
		1541	croak ("offset outside of scalar");
		1542
		1543	if (!SvOK (length) || len + offset > svlen)
		1544	len = svlen - offset;
		1545
		1546	{
		1547	dREQ;
		1548
		1549	req->type = EIO_MLOCK;
		1550	req->sv2 = SvREFCNT_inc (data);
		1551	req->ptr2 = (char *)svptr + offset;
		1552	req->size = len;
		1553
		1554	REQ_SEND;
		1555	}
		1556	}
		1557
		1558	void
		1559	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1560	PPCODE:
		1561	{
		1562	dREQ;
		1563
		1564	req->type = EIO_MLOCKALL;
		1565	req->int1 = flags;
		1566
		1567	REQ_SEND;
		1568	}
		1569
		1570	void
		1571	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1572	PPCODE:
		1573	{
		1574	int fd = s_fileno_croak (fh, 0);
1152	dREQ;	1575	dREQ;
		1576
		1577	req->type = EIO_CUSTOM;
		1578	req->sv1 = newSVsv (fh);
		1579	req->int1 = fd;
		1580
		1581	req->feed = fiemap;
		1582	#if HAVE_FIEMAP
		1583	/* keep our fingers crossed that the next two types are 64 bit */
		1584	req->offs = start;
		1585	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1586	req->int2 = flags;
		1587	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1588	#endif
		1589
		1590	REQ_SEND;
		1591	}
		1592
		1593	void
		1594	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1595	PPCODE:
		1596	{
		1597	dREQ;
		1598
		1599	req->type = EIO_BUSY;
		1600	req->nv1 = delay < 0. ? 0. : delay;
		1601
		1602	REQ_SEND;
		1603	}
		1604
		1605	void
		1606	aio_group (SV *callback=&PL_sv_undef)
		1607	PPCODE:
		1608	{
		1609	dREQ;
		1610
1153	req->type = REQ_GROUP;	1611	req->type = EIO_GROUP;
1154	req->grp_next = req;
1155	req->grp_prev = req;
1156		1612
1157	req_send (req);	1613	req_submit (req);
1158	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1614	XPUSHs (req_sv (req, aio_grp_stash));
1159	}	1615	}
		1616
		1617	void
		1618	aio_nop (SV *callback=&PL_sv_undef)
		1619	ALIAS:
		1620	aio_nop = EIO_NOP
		1621	aio_sync = EIO_SYNC
		1622	PPCODE:
		1623	{
		1624	dREQ;
		1625
		1626	req->type = ix;
		1627
		1628	REQ_SEND;
		1629	}
		1630
		1631	int
		1632	aioreq_pri (int pri = 0)
		1633	CODE:
		1634	RETVAL = next_pri;
		1635	if (items > 0)
		1636	{
		1637	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1638	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1639	next_pri = pri;
		1640	}
		1641	OUTPUT:
		1642	RETVAL
		1643
		1644	void
		1645	aioreq_nice (int nice = 0)
		1646	CODE:
		1647	nice = next_pri - nice;
		1648	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1649	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1650	next_pri = nice;
1160		1651
1161	void	1652	void
1162	flush ()	1653	flush ()
1163	PROTOTYPE:
1164	CODE:	1654	CODE:
1165	while (nreqs)	1655	while (eio_nreqs ())
1166	{	1656	{
1167	poll_wait ();	1657	poll_wait ();
1168	poll_cb ();	1658	poll_cb ();
1169	}	1659	}
1170		1660
1171	void	1661	int
1172	poll()	1662	poll ()
1173	PROTOTYPE:
1174	CODE:	1663	CODE:
1175	if (nreqs)
1176	{
1177	poll_wait ();	1664	poll_wait ();
1178	poll_cb ();	1665	RETVAL = poll_cb ();
1179	}
1180
1181	int
1182	poll_fileno()
1183	PROTOTYPE:
1184	CODE:
1185	RETVAL = respipe [0];
1186	OUTPUT:	1666	OUTPUT:
1187	RETVAL	1667	RETVAL
1188		1668
1189	int	1669	int
		1670	poll_fileno ()
		1671	CODE:
		1672	RETVAL = s_epipe_fd (&respipe);
		1673	OUTPUT:
		1674	RETVAL
		1675
		1676	int
1190	poll_cb(...)	1677	poll_cb (...)
1191	PROTOTYPE:	1678	PROTOTYPE:
1192	CODE:	1679	CODE:
1193	RETVAL = poll_cb ();	1680	RETVAL = poll_cb ();
1194	OUTPUT:	1681	OUTPUT:
1195	RETVAL	1682	RETVAL
1196		1683
1197	void	1684	void
1198	poll_wait()	1685	poll_wait ()
1199	PROTOTYPE:
1200	CODE:	1686	CODE:
1201	if (nreqs)
1202	poll_wait ();	1687	poll_wait ();
1203		1688
1204	int	1689	int
1205	nreqs()	1690	nreqs ()
1206	PROTOTYPE:
1207	CODE:	1691	CODE:
1208	RETVAL = nreqs;	1692	RETVAL = eio_nreqs ();
1209	OUTPUT:	1693	OUTPUT:
1210	RETVAL	1694	RETVAL
1211		1695
		1696	int
		1697	nready ()
		1698	CODE:
		1699	RETVAL = eio_nready ();
		1700	OUTPUT:
		1701	RETVAL
		1702
		1703	int
		1704	npending ()
		1705	CODE:
		1706	RETVAL = eio_npending ();
		1707	OUTPUT:
		1708	RETVAL
		1709
		1710	int
		1711	nthreads ()
		1712	CODE:
		1713	RETVAL = eio_nthreads ();
		1714	OUTPUT:
		1715	RETVAL
		1716
		1717	int
		1718	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1719	CODE:
		1720	RETVAL = posix_fadvise (fh, offset, length, advice);
		1721	OUTPUT:
		1722	RETVAL
		1723
		1724	IV
		1725	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1726	CODE:
		1727	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1728	OUTPUT:
		1729	RETVAL
		1730
		1731	void
		1732	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1733	PPCODE:
		1734	sv_unmagic (scalar, MMAP_MAGIC);
		1735	{
		1736	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1737	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1738	if (addr == (void *)-1)
		1739	XSRETURN_NO;
		1740
		1741	sv_force_normal (scalar);
		1742
		1743	/* we store the length in mg_obj, as namlen is I32 :/ */
		1744	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1745	->mg_obj = (SV *)length;
		1746
		1747	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1748
		1749	if (!(prot & PROT_WRITE))
		1750	SvREADONLY_on (scalar);
		1751
		1752	if (SvLEN (scalar))
		1753	Safefree (SvPVX (scalar));
		1754
		1755	SvPVX (scalar) = (char *)addr;
		1756	SvCUR_set (scalar, length);
		1757	SvLEN_set (scalar, 0);
		1758	SvPOK_only (scalar);
		1759
		1760	XSRETURN_YES;
		1761	}
		1762
		1763	void
		1764	munmap (SV *scalar)
		1765	CODE:
		1766	sv_unmagic (scalar, MMAP_MAGIC);
		1767
		1768	int
		1769	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1770	ALIAS:
		1771	mprotect = 1
		1772	CODE:
		1773	{
		1774	STRLEN svlen;
		1775	void *addr = SvPVbyte (scalar, svlen);
		1776	size_t len = SvUV (length);
		1777
		1778	if (offset < 0)
		1779	offset += svlen;
		1780
		1781	if (offset < 0 || offset > svlen)
		1782	croak ("offset outside of scalar");
		1783
		1784	if (!SvOK (length) || len + offset > svlen)
		1785	len = svlen - offset;
		1786
		1787	addr = (void *)(((intptr_t)addr) + offset);
		1788	eio_page_align (&addr, &len);
		1789
		1790	switch (ix)
		1791	{
		1792	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1793	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1794	}
		1795	}
		1796	OUTPUT:
		1797	RETVAL
		1798
		1799	int
		1800	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1801	CODE:
		1802	{
		1803	STRLEN svlen;
		1804	void *addr = SvPVbyte (scalar, svlen);
		1805	size_t len = SvUV (length);
		1806
		1807	if (offset < 0)
		1808	offset += svlen;
		1809
		1810	if (offset < 0 || offset > svlen)
		1811	croak ("offset outside of scalar");
		1812
		1813	if (!SvOK (length) || len + offset > svlen)
		1814	len = svlen - offset;
		1815
		1816	addr = (void *)(((intptr_t)addr) + offset);
		1817	eio_page_align (&addr, &len);
		1818	#if _POSIX_MEMLOCK_RANGE
		1819	RETVAL = munlock (addr, len);
		1820	#else
		1821	RETVAL = EIO_ENOSYS ();
		1822	#endif
		1823	}
		1824	OUTPUT:
		1825	RETVAL
		1826
		1827	int
		1828	munlockall ()
		1829	CODE:
		1830	#if _POSIX_MEMLOCK
		1831	munlockall ();
		1832	#else
		1833	RETVAL = EIO_ENOSYS ();
		1834	#endif
		1835	OUTPUT:
		1836	RETVAL
		1837
		1838	int
		1839	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1840	CODE:
		1841	{
		1842	#if HAVE_LINUX_SPLICE
		1843	loff_t off_in_, off_out_;
		1844	RETVAL = splice (
		1845	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1846	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1847	length, flags
		1848	);
		1849	#else
		1850	RETVAL = EIO_ENOSYS ();
		1851	#endif
		1852	}
		1853	OUTPUT:
		1854	RETVAL
		1855
		1856	int
		1857	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1858	CODE:
		1859	#if HAVE_LINUX_SPLICE
		1860	RETVAL = tee (rfh, wfh, length, flags);
		1861	#else
		1862	RETVAL = EIO_ENOSYS ();
		1863	#endif
		1864	OUTPUT:
		1865	RETVAL
		1866
		1867	void _on_next_submit (SV *cb)
		1868	CODE:
		1869	SvREFCNT_dec (on_next_submit);
		1870	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1871
		1872	PROTOTYPES: DISABLE
		1873
		1874	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1875
		1876	BOOT:
		1877	{
		1878	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1879	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1880	}
		1881
		1882	void
		1883	DESTROY (SV *self)
		1884	CODE:
		1885	{
		1886	aio_wd wd = SvAIO_WD (self);
		1887	#if HAVE_AT
		1888	{
		1889	SV *callback = &PL_sv_undef;
		1890	dREQ; /* clobbers next_pri :/ */
		1891	next_pri = req->pri; /* restore next_pri */
		1892	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1893	req->type = EIO_WD_CLOSE;
		1894	req->wd = wd;
		1895	REQ_SEND;
		1896	}
		1897	#else
		1898	eio_wd_close_sync (wd);
		1899	#endif
		1900	}
		1901
1212	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1902	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1213		1903
1214	void	1904	void
1215	cancel (aio_req_ornot req)	1905	cancel (aio_req_ornot req)
1216	PROTOTYPE:
1217	CODE:	1906	CODE:
1218	req_cancel (req);	1907	eio_cancel (req);
		1908
		1909	void
		1910	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1911	PPCODE:
		1912	{
		1913	if (GIMME_V != G_VOID)
		1914	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1915
		1916	if (items > 1)
		1917	{
		1918	SV *cb_cv =get_cb (callback);
		1919
		1920	SvREFCNT_dec (req->callback);
		1921	req->callback = SvREFCNT_inc (cb_cv);
		1922	}
		1923	}
1219		1924
1220	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1925	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1221		1926
1222	void	1927	void
1223	add (aio_req grp, ...)	1928	add (aio_req grp, ...)
1224	PROTOTYPE: $;@
1225	PPCODE:	1929	PPCODE:
1226	{	1930	{
1227	int i;	1931	int i;
		1932
		1933	if (grp->int1 == 2)
		1934	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1228		1935
1229	for (i = 1; i < items; ++i )	1936	for (i = 1; i < items; ++i )
1230	{	1937	{
		1938	aio_req req;
		1939
1231	if (GIMME_V != G_VOID)	1940	if (GIMME_V != G_VOID)
1232	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1941	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1233		1942
1234	aio_req req = SvAIO_REQ (ST (i));	1943	req = SvAIO_REQ (ST (i));
1235		1944
1236	if (req)	1945	if (req)
1237	{	1946	eio_grp_add (grp, req);
1238	req->grp_prev = grp;
1239	req->grp_next = grp->grp_next;
1240	grp->grp_next->grp_prev = req;
1241	grp->grp_next = req;
1242
1243	req->grp = grp;
1244	}
1245	}	1947	}
1246	}	1948	}
1247		1949
		1950	void
		1951	cancel_subs (aio_req_ornot req)
		1952	CODE:
		1953	req_cancel_subs (req);
		1954
		1955	void
		1956	result (aio_req grp, ...)
		1957	CODE:
		1958	{
		1959	int i;
		1960	AV *av;
		1961
		1962	grp->errorno = errno;
		1963
		1964	av = newAV ();
		1965	av_extend (av, items - 1);
		1966
		1967	for (i = 1; i < items; ++i )
		1968	av_push (av, newSVsv (ST (i)));
		1969
		1970	SvREFCNT_dec (grp->sv1);
		1971	grp->sv1 = (SV *)av;
		1972	}
		1973
		1974	void
		1975	errno (aio_req grp, int errorno = errno)
		1976	CODE:
		1977	grp->errorno = errorno;
		1978
		1979	void
		1980	limit (aio_req grp, int limit)
		1981	CODE:
		1982	eio_grp_limit (grp, limit);
		1983
		1984	void
		1985	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1986	CODE:
		1987	{
		1988	SvREFCNT_dec (grp->sv2);
		1989	grp->sv2 = newSVsv (callback);
		1990	grp->feed = aio_grp_feed;
		1991
		1992	if (grp->int2 <= 0)
		1993	grp->int2 = 2;
		1994
		1995	eio_grp_limit (grp, grp->int2);
		1996	}
		1997

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