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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs.
Revision 1.223 by root, Tue Aug 28 03:13:33 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/types.h>	14	#include <sys/types.h>
15	#include <sys/stat.h>	15	#include <sys/stat.h>
16	#include <limits.h>	16	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	17	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	18	#include <sched.h>
21		19
22	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
		23
23	# 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>
24	# include <sys/sendfile.h>	82	#include <sys/select.h>
25	# elif __freebsd	83	#include <unistd.h>
26	# include <sys/socket.h>	84	#include <utime.h>
27	# include <sys/uio.h>	85	#include <signal.h>
28	# elif __hpux	86
29	# include <sys/socket.h>	87	#define EIO_STRUCT_STAT Stat_t
30	# elif __solaris /* not yet */	88
31	# 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
32	# else	140	# else
33	# error sendfile support requested but not available	141	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
34	# endif	142	# endif
35	#endif	143	#endif
36		144
37	/* used for struct dirent, AIX doesn't provide it */	145	/* defines all sorts of constants to 0 unless they are already defined */
38	#ifndef NAME_MAX	146	#include "def0.h"
39	# define NAME_MAX 4096
40	#endif
41		147
42	#if __ia64	148	#ifndef makedev
43	# define STACKSIZE 65536	149	# define makedev(maj,min) (((maj) << 8) | (min))
		150	#endif
		151	#ifndef major
		152	# define major(dev) ((dev) >> 8)
		153	#endif
		154	#ifndef minor
		155	# define minor(dev) ((dev) & 0xff)
		156	#endif
		157
		158	#ifndef PAGESIZE
		159	# define PAGESIZE sysconf (_SC_PAGESIZE)
		160	#endif
		161
		162	/*****************************************************************************/
		163
		164	static void
		165	fiemap (eio_req *req)
		166	{
		167	req->result = -1;
		168
		169	#if HAVE_FIEMAP
		170	/* assume some c99 */
		171	struct fiemap *fiemap = 0;
		172	size_t end_offset;
		173	int count = req->int3;
		174
		175	req->flags |= EIO_FLAG_PTR1_FREE;
		176
		177	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		178	/* increase in 3.5kb steps */
		179	if (count < 0)
		180	count = 8;
		181
		182	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		183	errno = ENOMEM;
		184	if (!fiemap)
		185	return;
		186
		187	req->ptr1 = fiemap;
		188
		189	fiemap->fm_start = req->offs;
		190	fiemap->fm_length = req->size;
		191	fiemap->fm_flags = req->int2;
		192	fiemap->fm_extent_count = count;
		193
		194	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
		195	return;
		196
		197	if (req->int3 >= 0 /* not autosizing */
		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;
		201
		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	*/
		208
		209	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
		210
		211	for (;;)
		212	{
		213	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
		214	char scratch[3072];
		215	struct fiemap *incmap = (struct fiemap *)scratch;
		216
		217	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
		218	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		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);
		222
		223	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
		224	return;
		225
		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;
		231
		232	req->ptr1 = fiemap;
		233
		234	for (count = 0; count < incmap->fm_mapped_extents; ++count)
		235	{
		236	struct fiemap_extent *e = incmap->fm_extents + count;
		237
		238	if (e->fe_logical + e->fe_length >= end_offset)
		239	goto done;
		240
		241	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		242
		243	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		244	goto done;
		245
		246	}
		247	}
		248
		249	done:
		250	req->result = 0;
		251
44	#else	252	#else
45	# define STACKSIZE 8192	253	errno = ENOSYS;
46	#endif	254	#endif
		255	}
		256
		257	/*****************************************************************************/
47		258
48	enum {	259	enum {
49	REQ_QUIT,	260	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
50	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,
52	REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,
58	};	261	};
59		262
60	#define AIO_CB_KLASS "IO::AIO::CB"
61
62	typedef struct aio_cb
63	{
64	struct aio_cb *grp_prev, *grp_next;
65	struct aio_grp *grp;
66
67	struct aio_cb *volatile next;
68
69	SV *self; /* the perl counterpart of this request, if any */
70
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	Stat_t *statdata;
75	off_t offset;
76	size_t length;
77	ssize_t result;
78
79	int type;
80	int fd, fd2;
81	int errorno;
82	STRLEN dataoffset;
83	mode_t mode; /* open */
84	unsigned char cancelled;
85	} aio_cb;
86
87	typedef aio_cb *aio_req;	263	typedef eio_req *aio_req;
88	typedef aio_cb *aio_req_ornot;	264	typedef eio_req *aio_req_ornot;
		265	typedef eio_wd aio_wd;
89		266
90	static int started, wanted;	267	static SV *on_next_submit;
91	static volatile int nreqs;	268	static int next_pri = EIO_PRI_DEFAULT;
92	static int max_outstanding = 1<<30;	269	static int max_outstanding;
93	static int respipe [2];
94		270
95	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	271	static s_epipe respipe;
96	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
97	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
98		272
99	static volatile aio_req reqs, reqe; /* queue start, queue end */	273	static void req_destroy (aio_req req);
100	static volatile aio_req ress, rese; /* queue start, queue end */	274	static void req_cancel (aio_req req);
101		275
102	typedef struct aio_grp	276	static void
		277	want_poll (void)
103	{	278	{
104	struct aio_cb *first, *last;	279	/* write a dummy byte to the pipe so fh becomes ready */
105	SV *callback;	280	s_epipe_signal (&respipe);
106	int busycount;
107	} aio_grp;
108
109	static void aio_grp_begin (aio_grp *grp)
110	{
111	++grp->busycount;
112	}	281	}
113		282
114	static void aio_grp_end (aio_grp *grp)	283	static void
		284	done_poll (void)
115	{	285	{
116	--grp->busycount;	286	/* read any signals sent by the worker threads */
117		287	s_epipe_drain (&respipe);
118	if (grp->busycount)
119	return;
120
121	SvREFCNT_dec (grp->callback);
122	grp->callback = 0;
123	}
124
125	static aio_grp *aio_grp_new ()
126	{
127	aio_grp *grp;
128
129	Newz (0, grp, 1, aio_grp);
130	aio_grp_begin (grp);
131
132	return grp;
133	}	288	}
134		289
135	/* must be called at most once */	290	/* must be called at most once */
136	static SV *req_sv (aio_req req)	291	static SV *
		292	req_sv (aio_req req, HV *stash)
137	{	293	{
		294	if (!req->self)
		295	{
138	req->self = (SV *)newHV ();	296	req->self = (SV *)newHV ();
139	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	297	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		298	}
140		299
141	return sv_bless (newRV_noinc (req->self), gv_stashpv (AIO_CB_KLASS, 1));	300	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
142	}	301	}
143		302
144	static aio_req SvAIO_REQ (SV *sv)	303	static SV *
		304	newSVaio_wd (aio_wd wd)
145	{	305	{
146	if (!sv_derived_from (sv, AIO_CB_KLASS) || !SvROK (sv))	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")))
147	croak ("object of class " AIO_CB_KLASS " expected");	319	croak ("object of class IO::AIO::REQ expected");
148		320
149	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
150		322
151	return mg ? (aio_req)mg->mg_ptr : 0;	323	return mg ? (aio_req)mg->mg_ptr : 0;
152	}	324	}
153		325
154	static void req_free (aio_req req)	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)
155	{	656	{
156	if (req->self)	657	if (req->self)
157	{	658	{
158	sv_unmagic (req->self, PERL_MAGIC_ext);	659	sv_unmagic (req->self, PERL_MAGIC_ext);
159	SvREFCNT_dec (req->self);	660	SvREFCNT_dec (req->self);
160	}	661	}
161		662
162	if (req->data)
163	SvREFCNT_dec (req->data);
164
165	if (req->fh)
166	SvREFCNT_dec (req->fh);	663	SvREFCNT_dec (req->sv1);
167
168	if (req->fh2)
169	SvREFCNT_dec (req->fh2);	664	SvREFCNT_dec (req->sv2);
170		665	SvREFCNT_dec (req->sv3);
171	if (req->statdata)	666	SvREFCNT_dec (req->sv4);
172	Safefree (req->statdata);
173
174	if (req->callback)
175	SvREFCNT_dec (req->callback);	667	SvREFCNT_dec (req->callback);
176		668
177	if (req->type == REQ_READDIR && req->result >= 0)
178	free (req->data2ptr);
179
180	Safefree (req);	669	free (req);
181	}	670	}
182		671
183	static void	672	static void
		673	req_cancel_subs (aio_req grp)
		674	{
		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
184	poll_wait ()	692	poll_wait (void)
185	{	693	{
186	if (nreqs && !ress)	694	while (eio_nreqs ())
187	{	695	{
188	fd_set rfd;	696	int size;
189	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);
191		697
192	select (respipe [0] + 1, &rfd, 0, 0, 0);	698	X_LOCK (reslock);
		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);
193	}	708	}
194	}	709	}
195		710
196	static int	711	static int
197	poll_cb ()	712	poll_cb (void)
198	{	713	{
199	dSP;
200	int count = 0;
201	int do_croak = 0;
202	aio_req req;
203
204	for (;;)	714	for (;;)
205	{	715	{
206	pthread_mutex_lock (&reslock);	716	int res = eio_poll ();
207	req = ress;
208		717
209	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)
210	{	829	{
211	ress = req->next;	830	path = AvARRAY (rv)[1];
		831	wdob = AvARRAY (rv)[0];
212		832
213	if (!ress)	833	if (SvOK (wdob))
214	{	834	{
215	/* read any signals sent by the worker threads */	835	*wd = SvAIO_WD (wdob);
216	char buf [32];	836	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
217	while (read (respipe [0], buf, 32) == 32)
218	;
219
220	rese = 0;
221	}
222	}
223
224	pthread_mutex_unlock (&reslock);
225
226	if (!req)
227	break;
228
229	nreqs--;
230
231	if (req->type == REQ_QUIT)
232	started--;
233	else
234	{
235	int errorno = errno;
236	errno = req->errorno;
237
238	if (req->type == REQ_READ)
239	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
240
241	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
242	SvREADONLY_off (req->data);
243
244	if (req->statdata)
245	{
246	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
247	PL_laststatval = req->result;
248	PL_statcache = *(req->statdata);
249	}
250
251	ENTER;
252	PUSHMARK (SP);
253
254	if (req->type == REQ_READDIR)
255	{
256	SV *rv = &PL_sv_undef;
257
258	if (req->result >= 0)
259	{
260	char *buf = req->data2ptr;
261	AV *av = newAV ();
262
263	while (req->result)
264	{
265	SV *sv = newSVpv (buf, 0);
266
267	av_push (av, sv);
268	buf += SvCUR (sv) + 1;
269	req->result--;
270	}
271
272	rv = sv_2mortal (newRV_noinc ((SV *)av));
273	}
274
275	XPUSHs (rv);
276	}	837	}
277	else	838	else
278	{	839	*wd = EIO_INVALID_WD;
279	XPUSHs (sv_2mortal (newSViv (req->result)));
280
281	if (req->type == REQ_OPEN)
282	{
283	/* convert fd to fh */
284	SV *fh;
285
286	PUTBACK;
287	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
288	SPAGAIN;
289
290	fh = SvREFCNT_inc (POPs);
291
292	PUSHMARK (SP);
293	XPUSHs (sv_2mortal (fh));
294	}
295	}
296
297	if (SvOK (req->callback) && !req->cancelled)
298	{
299	PUTBACK;
300	call_sv (req->callback, G_VOID | G_EVAL);
301	SPAGAIN;
302
303	if (SvTRUE (ERRSV))
304	{
305	req_free (req);
306	croak (0);
307	}
308	}
309
310	LEAVE;
311
312	errno = errorno;
313	count++;
314	}	840	}
315		841	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
316	req_free (req);
317	}
318
319	return count;
320	}
321
322	static void *aio_proc(void *arg);
323
324	static void
325	start_thread (void)
326	{
327	sigset_t fullsigset, oldsigset;
328	pthread_t tid;
329	pthread_attr_t attr;
330
331	pthread_attr_init (&attr);
332	pthread_attr_setstacksize (&attr, STACKSIZE);
333	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
334
335	sigfillset (&fullsigset);
336	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
337
338	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
339	started++;
340
341	sigprocmask (SIG_SETMASK, &oldsigset, 0);
342	}
343
344	static void
345	req_send (aio_req req)
346	{
347	while (started < wanted && nreqs >= started)
348	start_thread ();
349
350	nreqs++;
351
352	pthread_mutex_lock (&reqlock);
353
354	req->next = 0;
355
356	if (reqe)
357	{
358	reqe->next = req;
359	reqe = req;
360	}
361	else
362	reqe = reqs = req;
363
364	pthread_cond_signal (&reqwait);
365	pthread_mutex_unlock (&reqlock);
366
367	if (nreqs > max_outstanding)
368	for (;;)
369	{
370	poll_cb ();
371
372	if (nreqs <= max_outstanding)
373	break;
374
375	poll_wait ();
376	}
377	}
378
379	static void
380	end_thread (void)
381	{
382	aio_req req;
383	Newz (0, req, 1, aio_cb);
384	req->type = REQ_QUIT;
385
386	req_send (req);
387	}
388
389	static void min_parallel (int nthreads)
390	{
391	if (wanted < nthreads)
392	wanted = nthreads;
393	}
394
395	static void max_parallel (int nthreads)
396	{
397	int cur = started;
398
399	if (wanted > nthreads)
400	wanted = nthreads;
401
402	while (cur > wanted)
403	{
404	end_thread ();
405	cur--;
406	}
407
408	while (started > wanted)
409	{
410	poll_wait ();
411	poll_cb ();
412	}
413	}
414
415	static void create_pipe ()
416	{
417	if (pipe (respipe))
418	croak ("unable to initialize result pipe");
419
420	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
421	croak ("cannot set result pipe to nonblocking mode");
422
423	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
424	croak ("cannot set result pipe to nonblocking mode");
425	}
426
427	/*****************************************************************************/
428	/* work around various missing functions */
429
430	#if !HAVE_PREADWRITE
431	# define pread aio_pread
432	# define pwrite aio_pwrite
433
434	/*
435	* make our pread/pwrite safe against themselves, but not against
436	* normal read/write by using a mutex. slows down execution a lot,
437	* but that's your problem, not mine.
438	*/
439	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
440
441	static ssize_t
442	pread (int fd, void *buf, size_t count, off_t offset)
443	{
444	ssize_t res;
445	off_t ooffset;
446
447	pthread_mutex_lock (&preadwritelock);
448	ooffset = lseek (fd, 0, SEEK_CUR);
449	lseek (fd, offset, SEEK_SET);
450	res = read (fd, buf, count);
451	lseek (fd, ooffset, SEEK_SET);
452	pthread_mutex_unlock (&preadwritelock);
453
454	return res;
455	}
456
457	static ssize_t
458	pwrite (int fd, void *buf, size_t count, off_t offset)
459	{
460	ssize_t res;
461	off_t ooffset;
462
463	pthread_mutex_lock (&preadwritelock);
464	ooffset = lseek (fd, 0, SEEK_CUR);
465	lseek (fd, offset, SEEK_SET);
466	res = write (fd, buf, count);
467	lseek (fd, offset, SEEK_SET);
468	pthread_mutex_unlock (&preadwritelock);
469
470	return res;
471	}
472	#endif
473
474	#if !HAVE_FDATASYNC
475	# define fdatasync fsync
476	#endif
477
478	#if !HAVE_READAHEAD
479	# define readahead aio_readahead
480
481	static ssize_t
482	readahead (int fd, off_t offset, size_t count)
483	{
484	char readahead_buf[4096];
485
486	while (count > 0)
487	{
488	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
489
490	pread (fd, readahead_buf, len, offset);
491	offset += len;
492	count -= len;
493	}
494
495	errno = 0;
496	}
497	#endif
498
499	#if !HAVE_READDIR_R
500	# define readdir_r aio_readdir_r
501
502	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
503
504	static int
505	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
506	{
507	struct dirent *e;
508	int errorno;
509
510	pthread_mutex_lock (&readdirlock);
511
512	e = readdir (dirp);
513	errorno = errno;
514
515	if (e)
516	{
517	*res = ent;
518	strcpy (ent->d_name, e->d_name);
519	}
520	else
521	*res = 0;
522
523	pthread_mutex_unlock (&readdirlock);
524
525	errno = errorno;
526	return e ? 0 : -1;
527	}
528	#endif
529
530	/* sendfile always needs emulation */
531	static ssize_t
532	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
533	{
534	ssize_t res;
535
536	if (!count)
537	return 0;
538
539	#if HAVE_SENDFILE
540	# if __linux
541	res = sendfile (ofd, ifd, &offset, count);
542
543	# elif __freebsd
544	/*
545	* Of course, the freebsd sendfile is a dire hack with no thoughts
546	* wasted on making it similar to other I/O functions.
547	*/
548	{
549	off_t sbytes;
550	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
551
552	if (res < 0 && sbytes)
553	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
554	res = sbytes;
555	}
556
557	# elif __hpux
558	res = sendfile (ofd, ifd, offset, count, 0, 0);
559
560	# elif __solaris
561	{
562	struct sendfilevec vec;
563	size_t sbytes;
564
565	vec.sfv_fd = ifd;
566	vec.sfv_flag = 0;
567	vec.sfv_off = offset;
568	vec.sfv_len = count;
569
570	res = sendfilev (ofd, &vec, 1, &sbytes);
571
572	if (res < 0 && sbytes)
573	res = sbytes;
574	}
575
576	# endif
577	#else
578	res = -1;
579	errno = ENOSYS;
580	#endif
581
582	if (res < 0
583	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
584	#if __solaris
585	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
586	#endif
587	)
588	)
589	{
590	/* emulate sendfile. this is a major pain in the ass */
591	char buf[4096];
592	res = 0;
593
594	while (count)
595	{	842	{
596	ssize_t cnt;	843	*wd = (aio_wd)(long)SvIVX (rv);
597		844	*wdsv = SvREFCNT_inc_NN (rv);
598	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	845	*ptr = ".";
599		846	return; /* path set to "." */
600	if (cnt <= 0)
601	{
602	if (cnt && !res) res = -1;
603	break;
604	}
605
606	cnt = write (ofd, buf, cnt);
607
608	if (cnt <= 0)
609	{
610	if (cnt && !res) res = -1;
611	break;
612	}
613
614	offset += cnt;
615	res += cnt;
616	count -= cnt;
617	}
618	}
619
620	return res;
621	}
622
623	/* read a full directory */
624	static int
625	scandir_ (const char *path, void **namesp)
626	{
627	DIR *dirp = opendir (path);
628	union
629	{
630	struct dirent d;
631	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
632	} u;
633	struct dirent *entp;
634	char *name, *names;
635	int memlen = 4096;
636	int memofs = 0;
637	int res = 0;
638	int errorno;
639
640	if (!dirp)
641	return -1;
642
643	names = malloc (memlen);
644
645	for (;;)
646	{
647	errno = 0, readdir_r (dirp, &u.d, &entp);
648
649	if (!entp)
650	break;
651
652	name = entp->d_name;
653
654	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
655	{
656	int len = strlen (name) + 1;
657
658	res++;
659
660	while (memofs + len > memlen)
661	{
662	memlen *= 2;
663	names = realloc (names, memlen);
664	if (!names)
665	break;
666	}
667
668	memcpy (names + memofs, name, len);
669	memofs += len;
670	}
671	}
672
673	errorno = errno;
674	closedir (dirp);
675
676	if (errorno)
677	{
678	free (names);
679	errno = errorno;
680	res = -1;
681	}
682
683	*namesp = (void *)names;
684	return res;
685	}
686
687	/*****************************************************************************/
688
689	static void *
690	aio_proc (void *thr_arg)
691	{
692	aio_req req;
693	int type;
694
695	do
696	{
697	pthread_mutex_lock (&reqlock);
698
699	for (;;)
700	{
701	req = reqs;
702
703	if (reqs)
704	{
705	reqs = reqs->next;
706	if (!reqs) reqe = 0;
707	}
708
709	if (req)
710	break;
711
712	pthread_cond_wait (&reqwait, &reqlock);
713	}
714
715	pthread_mutex_unlock (&reqlock);
716
717	errno = 0; /* strictly unnecessary */
718
719	if (!req->cancelled)
720	switch (req->type)
721	{
722	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
723	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
724
725	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
726	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
727
728	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
729	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
730	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
731
732	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
733	case REQ_CLOSE: req->result = close (req->fd); break;
734	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
735	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
736	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
737	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
738	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
739
740	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
741	case REQ_FSYNC: req->result = fsync (req->fd); break;
742	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
743
744	case REQ_QUIT:
745	break;
746
747	default:
748	req->result = ENOSYS;
749	break;
750	}
751
752	req->errorno = errno;
753
754	pthread_mutex_lock (&reslock);
755
756	req->next = 0;
757
758	if (rese)
759	{
760	rese->next = req;
761	rese = req;
762	}	847	}
763	else	848	else
764	{	849	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
765	rese = ress = req;
766
767	/* write a dummy byte to the pipe so fh becomes ready */
768	write (respipe [1], &respipe, 1);
769	}
770
771	pthread_mutex_unlock (&reslock);
772	}	850	}
773	while (type != REQ_QUIT);
774		851
775	return 0;	852	*pathsv = newSVsv (path);
		853	*ptr = SvPVbyte_nolen (*pathsv);
776	}	854	}
777		855
778	/*****************************************************************************/	856	static void ecb_noinline
779		857	req_set_path1 (aio_req req, SV *path)
780	static void atfork_prepare (void)
781	{	858	{
782	pthread_mutex_lock (&reqlock);	859	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
783	pthread_mutex_lock (&reslock);
784	#if !HAVE_PREADWRITE
785	pthread_mutex_lock (&preadwritelock);
786	#endif
787	#if !HAVE_READDIR_R
788	pthread_mutex_lock (&readdirlock);
789	#endif
790	}	860	}
791		861
792	static void atfork_parent (void)	862	static void ecb_noinline
		863	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
793	{	864	{
794	#if !HAVE_READDIR_R	865	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
795	pthread_mutex_unlock (&readdirlock);
796	#endif
797	#if !HAVE_PREADWRITE
798	pthread_mutex_unlock (&preadwritelock);
799	#endif
800	pthread_mutex_unlock (&reslock);
801	pthread_mutex_unlock (&reqlock);
802	}
803		866
804	static void atfork_child (void)	867	switch (SvTYPE (rv))
805	{
806	aio_req prv;
807
808	started = 0;
809
810	while (reqs)
811	{	868	{
812	prv = reqs;	869	case SVt_PVIO:
813	reqs = prv->next;	870	case SVt_PVLV:
814	req_free (prv);	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;
815	}	881	}
816
817	reqs = reqe = 0;
818
819	while (ress)
820	{
821	prv = ress;
822	ress = prv->next;
823	req_free (prv);
824	}
825
826	ress = rese = 0;
827
828	close (respipe [0]);
829	close (respipe [1]);
830	create_pipe ();
831
832	atfork_parent ();
833	}	882	}
834		883
835	#define dREQ \	884	XS(boot_IO__AIO) ecb_cold;
836	aio_req req; \
837	\
838	if (SvOK (callback) && !SvROK (callback)) \
839	croak ("callback must be undef or of reference type"); \
840	\
841	Newz (0, req, 1, aio_cb); \
842	if (!req) \
843	croak ("out of memory during aio_req allocation"); \
844	\
845	req->callback = newSVsv (callback)
846		885
847	#define REQ_SEND \
848	req_send (req); \
849	\
850	if (GIMME_V != G_VOID) \
851	XPUSHs (req_sv (req));
852
853	MODULE = IO::AIO PACKAGE = IO::AIO	886	MODULE = IO::AIO PACKAGE = IO::AIO
854		887
855	PROTOTYPES: ENABLE	888	PROTOTYPES: ENABLE
856		889
857	BOOT:	890	BOOT:
858	{	891	{
		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 },
		899
		900	/* you have to re-run ./gendef0 after adding/Removing any constants here */
		901
		902	const_iv (ENOSYS)
		903	const_iv (EXDEV)
		904	const_iv (EBADR)
		905
		906	const_iv (O_RDONLY)
		907	const_iv (O_WRONLY)
		908	const_iv (O_RDWR)
		909	const_iv (O_CREAT)
		910	const_iv (O_TRUNC)
		911	const_iv (O_EXCL)
		912	const_iv (O_APPEND)
		913
		914	const_iv (O_ASYNC)
		915	const_iv (O_DIRECT)
		916	const_iv (O_NOATIME)
		917
		918	const_iv (O_CLOEXEC)
		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)
		929
		930	const_iv (S_IFIFO)
		931	const_iv (S_IFCHR)
		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)
		939
		940	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		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)
		946
		947	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		948	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		949	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		950	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		951	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		952
		953	const_iv (ST_RDONLY)
		954	const_iv (ST_NOSUID)
		955	const_iv (ST_NODEV)
		956	const_iv (ST_NOEXEC)
		957	const_iv (ST_SYNCHRONOUS)
		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)
		965
		966	const_iv (PROT_NONE)
		967	const_iv (PROT_EXEC)
		968	const_iv (PROT_READ)
		969	const_iv (PROT_WRITE)
		970
		971	/*const_iv (MAP_FIXED)*/
		972	const_iv (MAP_PRIVATE)
		973	const_iv (MAP_SHARED)
		974	const_iv (MAP_ANONYMOUS)
		975
		976	/* linuxish */
		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)
		982
		983	const_iv (FIEMAP_FLAG_SYNC)
		984	const_iv (FIEMAP_FLAG_XATTR)
		985	const_iv (FIEMAP_FLAGS_COMPAT)
		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)
		997
		998	const_iv (SPLICE_F_MOVE)
		999	const_iv (SPLICE_F_NONBLOCK)
		1000	const_iv (SPLICE_F_MORE)
		1001	const_iv (SPLICE_F_GIFT)
		1002
		1003	const_iv (SEEK_DATA)
		1004	const_iv (SEEK_HOLE)
		1005
		1006	/* libeio constants */
		1007	const_eio (SEEK_SET)
		1008	const_eio (SEEK_CUR)
		1009	const_eio (SEEK_END)
		1010
		1011	const_eio (MCL_FUTURE)
		1012	const_eio (MCL_CURRENT)
		1013
		1014	const_eio (MS_ASYNC)
		1015	const_eio (MS_INVALIDATE)
		1016	const_eio (MS_SYNC)
		1017
		1018	const_eio (MT_MODIFY)
		1019
		1020	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1021	const_eio (SYNC_FILE_RANGE_WRITE)
		1022	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1023
		1024	const_eio (FALLOC_FL_KEEP_SIZE)
		1025	const_eio (FALLOC_FL_PUNCH_HOLE)
		1026
		1027	const_eio (READDIR_DENTS)
		1028	const_eio (READDIR_DIRS_FIRST)
		1029	const_eio (READDIR_STAT_ORDER)
		1030	const_eio (READDIR_FOUND_UNKNOWN)
		1031
		1032	const_eio (DT_UNKNOWN)
		1033	const_eio (DT_FIFO)
		1034	const_eio (DT_CHR)
		1035	const_eio (DT_DIR)
		1036	const_eio (DT_BLK)
		1037	const_eio (DT_REG)
		1038	const_eio (DT_LNK)
		1039	const_eio (DT_SOCK)
		1040	const_eio (DT_WHT)
		1041	};
		1042
859	HV *stash = gv_stashpv ("IO::AIO", 1);	1043	aio_stash = gv_stashpv ("IO::AIO" , 1);
860	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1044	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
861	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1045	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
862	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1046	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
863		1047
864	create_pipe ();	1048	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
865	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1049	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
866	}
867		1050
		1051	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1052
		1053	reinit ();
		1054	}
		1055
868	void	1056	void
869	min_parallel (nthreads)	1057	reinit ()
870	int nthreads	1058	PROTOTYPE:
		1059
		1060	void
		1061	max_poll_reqs (unsigned int nreqs)
871	PROTOTYPE: $	1062	PROTOTYPE: $
		1063	CODE:
		1064	eio_set_max_poll_reqs (nreqs);
872		1065
873	void	1066	void
874	max_parallel (nthreads)	1067	max_poll_time (double nseconds)
875	int nthreads
876	PROTOTYPE: $	1068	PROTOTYPE: $
877
878	int
879	max_outstanding (nreqs)
880	int nreqs
881	PROTOTYPE: $
882	CODE:	1069	CODE:
883	RETVAL = max_outstanding;	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:
884	max_outstanding = nreqs;	1100	max_outstanding = maxreqs;
885		1101
886	void	1102	void
887	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1103	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
888	SV * pathname
889	int flags
890	int mode
891	SV * callback
892	PROTOTYPE: $$$;$
893	PPCODE:	1104	PPCODE:
894	{	1105	{
895	dREQ;	1106	dREQ;
896		1107
897	req->type = REQ_OPEN;	1108	req->type = EIO_WD_OPEN;
898	req->data = newSVsv (pathname);	1109	req_set_path1 (req, pathname);
899	req->dataptr = SvPVbyte_nolen (req->data);
900	req->fd = flags;
901	req->mode = mode;
902		1110
903	REQ_SEND;	1111	REQ_SEND;
904	}	1112	}
905		1113
906	void	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
907	aio_close (fh,callback=&PL_sv_undef)	1129	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
908	SV * fh
909	SV * callback
910	PROTOTYPE: $;$
911	ALIAS:	1130	ALIAS:
912	aio_close = REQ_CLOSE
913	aio_fsync = REQ_FSYNC	1131	aio_fsync = EIO_FSYNC
914	aio_fdatasync = REQ_FDATASYNC	1132	aio_fdatasync = EIO_FDATASYNC
		1133	aio_syncfs = EIO_SYNCFS
915	PPCODE:	1134	PPCODE:
916	{	1135	{
		1136	int fd = s_fileno_croak (fh, 0);
917	dREQ;	1137	dREQ;
918		1138
919	req->type = ix;	1139	req->type = ix;
920	req->fh = newSVsv (fh);	1140	req->sv1 = newSVsv (fh);
921	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1141	req->int1 = fd;
922		1142
923	REQ_SEND (req);	1143	REQ_SEND;
924	}	1144	}
925		1145
926	void	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;
		1157	req->size = nbytes;
		1158	req->int2 = flags;
		1159
		1160	REQ_SEND;
		1161	}
		1162
		1163	void
		1164	aio_allocate (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
		1195	#else
		1196	pipe (pipefd) < 0
		1197	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1198	#endif
		1199	|| close (pipefd [1]) < 0
		1200	)
		1201	abort (); /*D*/
		1202
		1203	close_fd = pipefd [0];
		1204	}
		1205
		1206	req->type = EIO_DUP2;
		1207	req->int1 = close_fd;
		1208	req->sv2 = newSVsv (fh);
		1209	req->int2 = fd;
		1210
		1211	REQ_SEND;
		1212	}
		1213
		1214	void
		1215	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
		1216	PPCODE:
		1217	{
		1218	int fd = s_fileno_croak (fh, 0);
		1219	dREQ;
		1220
		1221	req->type = EIO_SEEK;
		1222	req->sv1 = newSVsv (fh);
		1223	req->int1 = fd;
		1224	req->offs = SvVAL64 (offset);
		1225	req->int2 = whence;
		1226
		1227	REQ_SEND;
		1228	}
		1229
		1230	void
927	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1231	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
928	SV * fh
929	UV offset
930	UV length
931	SV * data
932	UV dataoffset
933	SV * callback
934	ALIAS:	1232	ALIAS:
935	aio_read = REQ_READ	1233	aio_read = EIO_READ
936	aio_write = REQ_WRITE	1234	aio_write = EIO_WRITE
937	PROTOTYPE: $$$$$;$
938	PPCODE:	1235	PPCODE:
939	{	1236	{
940	aio_req req;
941	STRLEN svlen;	1237	STRLEN svlen;
		1238	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
942	char *svptr = SvPVbyte (data, svlen);	1239	char *svptr = SvPVbyte (data, svlen);
943		1240	UV len = SvUV (length);
944	SvUPGRADE (data, SVt_PV);
945	SvPOK_on (data);
946		1241
947	if (dataoffset < 0)	1242	if (dataoffset < 0)
948	dataoffset += svlen;	1243	dataoffset += svlen;
949		1244
950	if (dataoffset < 0 || dataoffset > svlen)	1245	if (dataoffset < 0 || dataoffset > svlen)
951	croak ("data offset outside of string");	1246	croak ("dataoffset outside of data scalar");
952		1247
953	if (ix == REQ_WRITE)	1248	if (ix == EIO_WRITE)
954	{	1249	{
955	/* write: check length and adjust. */	1250	/* write: check length and adjust. */
956	if (length < 0 || length + dataoffset > svlen)	1251	if (!SvOK (length) || len + dataoffset > svlen)
957	length = svlen - dataoffset;	1252	len = svlen - dataoffset;
958	}	1253	}
959	else	1254	else
960	{	1255	{
961	/* 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))
962	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");
963	}	1262	}
964
965	if (length < 0)
966	croak ("length must not be negative");
967		1263
968	{	1264	{
969	dREQ;	1265	dREQ;
970		1266
971	req->type = ix;	1267	req->type = ix;
972	req->fh = newSVsv (fh);	1268	req->sv1 = newSVsv (fh);
973	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1269	req->int1 = fd;
974	: IoOFP (sv_2io (fh)));	1270	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
975	req->offset = offset;	1271	req->size = len;
976	req->length = length;
977	req->data = SvREFCNT_inc (data);	1272	req->sv2 = SvREFCNT_inc (data);
978	req->dataptr = (char *)svptr + dataoffset;	1273	req->ptr2 = (char *)svptr + dataoffset;
		1274	req->stroffset = dataoffset;
979		1275
980	if (!SvREADONLY (data))	1276	if (!SvREADONLY (data))
981	{	1277	{
982	SvREADONLY_on (data);	1278	SvREADONLY_on (data);
983	req->data2ptr = (void *)data;	1279	req->flags |= FLAG_SV2_RO_OFF;
984	}	1280	}
985		1281
986	REQ_SEND;	1282	REQ_SEND;
987	}	1283	}
988	}	1284	}
989		1285
990	void	1286	void
991	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1287	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
992	SV * out_fh	1288	ALIAS:
993	SV * in_fh	1289	aio_readlink = EIO_READLINK
994	UV in_offset	1290	aio_realpath = EIO_REALPATH
995	UV length
996	SV * callback
997	PROTOTYPE: $$$$;$
998	PPCODE:	1291	PPCODE:
999	{	1292	{
		1293	dREQ;
		1294
		1295	req->type = ix;
		1296	req_set_path1 (req, pathname);
		1297
		1298	REQ_SEND;
		1299	}
		1300
		1301	void
		1302	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1303	PPCODE:
		1304	{
		1305	int ifd = s_fileno_croak (in_fh , 0);
		1306	int ofd = s_fileno_croak (out_fh, 1);
1000	dREQ;	1307	dREQ;
1001		1308
1002	req->type = REQ_SENDFILE;	1309	req->type = EIO_SENDFILE;
1003	req->fh = newSVsv (out_fh);	1310	req->sv1 = newSVsv (out_fh);
1004	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1311	req->int1 = ofd;
1005	req->fh2 = newSVsv (in_fh);	1312	req->sv2 = newSVsv (in_fh);
1006	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1313	req->int2 = ifd;
1007	req->offset = in_offset;	1314	req->offs = in_offset;
1008	req->length = length;	1315	req->size = length;
1009		1316
1010	REQ_SEND;	1317	REQ_SEND;
1011	}	1318	}
1012		1319
1013	void	1320	void
1014	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1321	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1015	SV * fh
1016	UV offset
1017	IV length
1018	SV * callback
1019	PROTOTYPE: $$$;$
1020	PPCODE:	1322	PPCODE:
1021	{	1323	{
		1324	int fd = s_fileno_croak (fh, 0);
1022	dREQ;	1325	dREQ;
1023		1326
1024	req->type = REQ_READAHEAD;	1327	req->type = EIO_READAHEAD;
1025	req->fh = newSVsv (fh);	1328	req->sv1 = newSVsv (fh);
1026	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1329	req->int1 = fd;
1027	req->offset = offset;	1330	req->offs = offset;
1028	req->length = length;	1331	req->size = length;
1029		1332
1030	REQ_SEND;	1333	REQ_SEND;
1031	}	1334	}
1032		1335
1033	void	1336	void
1034	aio_stat (fh_or_path,callback=&PL_sv_undef)	1337	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1035	SV * fh_or_path
1036	SV * callback
1037	ALIAS:	1338	ALIAS:
1038	aio_stat = REQ_STAT	1339	aio_stat = EIO_STAT
1039	aio_lstat = REQ_LSTAT	1340	aio_lstat = EIO_LSTAT
		1341	aio_statvfs = EIO_STATVFS
1040	PPCODE:	1342	PPCODE:
1041	{	1343	{
1042	dREQ;	1344	dREQ;
1043		1345
1044	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);
1045	if (!req->statdata)
1046	{
1047	req_free (req);
1048	croak ("out of memory during aio_req->statdata allocation");
1049	}
1050
1051	if (SvPOK (fh_or_path))
1052	{
1053	req->type = ix;
1054	req->data = newSVsv (fh_or_path);
1055	req->dataptr = SvPVbyte_nolen (req->data);
1056	}
1057	else
1058	{
1059	req->type = REQ_FSTAT;
1060	req->fh = newSVsv (fh_or_path);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1062	}
1063		1347
1064	REQ_SEND;	1348	REQ_SEND;
1065	}	1349	}
1066		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
1067	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
1068	aio_unlink (pathname,callback=&PL_sv_undef)	1448	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1069	SV * pathname
1070	SV * callback
1071	ALIAS:	1449	ALIAS:
1072	aio_unlink = REQ_UNLINK	1450	aio_unlink = EIO_UNLINK
1073	aio_rmdir = REQ_RMDIR	1451	aio_rmdir = EIO_RMDIR
1074	aio_readdir = REQ_READDIR	1452	aio_readdir = EIO_READDIR
1075	PPCODE:	1453	PPCODE:
1076	{	1454	{
1077	dREQ;	1455	dREQ;
1078		1456
1079	req->type = ix;	1457	req->type = ix;
1080	req->data = newSVsv (pathname);	1458	req_set_path1 (req, pathname);
1081	req->dataptr = SvPVbyte_nolen (req->data);	1459
1082
1083	REQ_SEND;	1460	REQ_SEND;
1084	}	1461	}
1085		1462
1086	void	1463	void
1087	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1464	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1088	SV * oldpath
1089	SV * newpath
1090	SV * callback
1091	ALIAS:	1465	ALIAS:
1092	aio_link = REQ_LINK	1466	aio_link = EIO_LINK
1093	aio_symlink = REQ_SYMLINK	1467	aio_symlink = EIO_SYMLINK
1094	aio_rename = REQ_RENAME	1468	aio_rename = EIO_RENAME
1095	PPCODE:	1469	PPCODE:
1096	{	1470	{
		1471	eio_wd wd2 = 0;
1097	dREQ;	1472	dREQ;
1098		1473
1099	req->type = ix;	1474	req->type = ix;
1100	req->fh = newSVsv (oldpath);	1475	req_set_path1 (req, oldpath);
1101	req->data2ptr = SvPVbyte_nolen (req->fh);	1476	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1102	req->data = newSVsv (newpath);	1477	req->int3 = (long)wd2;
1103	req->dataptr = SvPVbyte_nolen (req->data);
1104		1478
1105	REQ_SEND;	1479	REQ_SEND;
1106	}	1480	}
1107		1481
1108	#if 0
1109
1110	# undocumented, because it does not cancel active requests
1111	void	1482	void
1112	cancel_most_requests ()	1483	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1113	PROTOTYPE:	1484	PPCODE:
		1485	{
		1486	dREQ;
		1487
		1488	req->type = EIO_MKNOD;
		1489	req->int2 = (mode_t)mode;
		1490	req->offs = dev;
		1491	req_set_path1 (req, pathname);
		1492
		1493	REQ_SEND;
		1494	}
		1495
		1496	void
		1497	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1498	ALIAS:
		1499	aio_mtouch = EIO_MTOUCH
		1500	aio_msync = EIO_MSYNC
1114	CODE:	1501	PPCODE:
1115	{	1502	{
1116	aio_req *req;	1503	STRLEN svlen;
		1504	char *svptr = SvPVbyte (data, svlen);
		1505	UV len = SvUV (length);
1117		1506
1118	pthread_mutex_lock (&reqlock);	1507	if (offset < 0)
1119	for (req = reqs; req; req = req->next)	1508	offset += svlen;
1120	req->flags |= 1;
1121	pthread_mutex_unlock (&reqlock);
1122		1509
1123	pthread_mutex_lock (&reslock);	1510	if (offset < 0 || offset > svlen)
1124	for (req = ress; req; req = req->next)	1511	croak ("offset outside of scalar");
1125	req->flags |= 1;
1126	pthread_mutex_unlock (&reslock);
1127	}
1128		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);
		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;
1129	#endif	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
		1611	req->type = EIO_GROUP;
		1612
		1613	req_submit (req);
		1614	XPUSHs (req_sv (req, aio_grp_stash));
		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;
1130		1651
1131	void	1652	void
1132	flush ()	1653	flush ()
1133	PROTOTYPE:
1134	CODE:	1654	CODE:
1135	while (nreqs)	1655	while (eio_nreqs ())
1136	{	1656	{
1137	poll_wait ();	1657	poll_wait ();
1138	poll_cb ();	1658	poll_cb ();
1139	}	1659	}
1140		1660
1141	void	1661	int
1142	poll()	1662	poll ()
1143	PROTOTYPE:
1144	CODE:	1663	CODE:
1145	if (nreqs)
1146	{
1147	poll_wait ();	1664	poll_wait ();
1148	poll_cb ();	1665	RETVAL = poll_cb ();
1149	}
1150
1151	int
1152	poll_fileno()
1153	PROTOTYPE:
1154	CODE:
1155	RETVAL = respipe [0];
1156	OUTPUT:	1666	OUTPUT:
1157	RETVAL	1667	RETVAL
1158		1668
1159	int	1669	int
		1670	poll_fileno ()
		1671	CODE:
		1672	RETVAL = s_epipe_fd (&respipe);
		1673	OUTPUT:
		1674	RETVAL
		1675
		1676	int
1160	poll_cb(...)	1677	poll_cb (...)
1161	PROTOTYPE:	1678	PROTOTYPE:
1162	CODE:	1679	CODE:
1163	RETVAL = poll_cb ();	1680	RETVAL = poll_cb ();
1164	OUTPUT:	1681	OUTPUT:
1165	RETVAL	1682	RETVAL
1166		1683
1167	void	1684	void
1168	poll_wait()	1685	poll_wait ()
1169	PROTOTYPE:
1170	CODE:	1686	CODE:
1171	if (nreqs)
1172	poll_wait ();	1687	poll_wait ();
1173		1688
1174	int	1689	int
1175	nreqs()	1690	nreqs ()
1176	PROTOTYPE:
1177	CODE:	1691	CODE:
1178	RETVAL = nreqs;	1692	RETVAL = eio_nreqs ();
1179	OUTPUT:	1693	OUTPUT:
1180	RETVAL	1694	RETVAL
1181		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
1182	MODULE = IO::AIO PACKAGE = IO::AIO::CB	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
		1902	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1183		1903
1184	void	1904	void
1185	cancel (aio_req_ornot req)	1905	cancel (aio_req_ornot req)
1186	PROTOTYPE:
1187	CODE:	1906	CODE:
1188	req->cancelled = 1;	1907	eio_cancel (req);
1189		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	}
		1924
		1925	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1926
		1927	void
		1928	add (aio_req grp, ...)
		1929	PPCODE:
		1930	{
		1931	int i;
		1932
		1933	if (grp->int1 == 2)
		1934	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1935
		1936	for (i = 1; i < items; ++i )
		1937	{
		1938	aio_req req;
		1939
		1940	if (GIMME_V != G_VOID)
		1941	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1942
		1943	req = SvAIO_REQ (ST (i));
		1944
		1945	if (req)
		1946	eio_grp_add (grp, req);
		1947	}
		1948	}
		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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