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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.49 by root, Sun Oct 22 13:33:28 2006 UTC vs.
Revision 1.211 by root, Sat Apr 7 00:50:33 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/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/fiemap.h>
		28	# define HAVE_FIEMAP 1
		29	# endif
		30	#endif
		31
		32	/* perl namespace pollution */
		33	#undef VERSION
		34
		35	/* perl stupidly overrides readdir and maybe others */
		36	/* with thread-unsafe versions, imagine that :( */
		37	#undef readdir
		38	#undef opendir
		39	#undef closedir
		40
		41	#ifdef _WIN32
		42
		43	// perl overrides all those nice libc functions
		44
		45	#undef malloc
		46	#undef free
		47	#undef open
		48	#undef read
		49	#undef write
		50	#undef send
		51	#undef recv
		52	#undef stat
		53	#undef lstat
		54	#undef fstat
		55	#undef truncate
		56	#undef ftruncate
		57	#undef open
		58	#undef link
		59	#undef close
		60	#undef unlink
		61	#undef mkdir
		62	#undef rmdir
		63	#undef rename
		64	#undef lseek
		65	#undef opendir
		66	#undef readdir
		67	#undef closedir
		68	#undef chmod
		69	#undef fchmod
		70	#undef dup
		71	#undef dup2
		72	#undef abort
		73	#undef pipe
		74
		75	#define EIO_STRUCT_STAT struct _stati64
		76	#define EIO_STRUCT_STATI64
		77
		78	#else
		79
		80	#include <sys/time.h>
26	# include <sys/sendfile.h>	81	#include <sys/select.h>
27	# elif __freebsd	82	#include <unistd.h>
28	# include <sys/socket.h>	83	#include <utime.h>
29	# include <sys/uio.h>	84	#include <signal.h>
30	# elif __hpux	85
31	# include <sys/socket.h>	86	#define EIO_STRUCT_STAT Stat_t
32	# elif __solaris /* not yet */	87
33	# include <sys/sendfile.h>	88	#endif
		89
		90	/*****************************************************************************/
		91
		92	#if __GNUC__ >= 3
		93	# define expect(expr,value) __builtin_expect ((expr),(value))
		94	#else
		95	# define expect(expr,value) (expr)
		96	#endif
		97
		98	#define expect_false(expr) expect ((expr) != 0, 0)
		99	#define expect_true(expr) expect ((expr) != 0, 1)
		100
		101	/*****************************************************************************/
		102
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		108
		109	#define EIO_REQ_MEMBERS \
		110	SV *callback; \
		111	SV *sv1, *sv2; \
		112	SV *sv3, *sv4; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/config.h"
		119	#include "libeio/eio.h"
		120
		121	static int req_invoke (eio_req *req);
		122	#define EIO_FINISH(req) req_invoke (req)
		123	static void req_destroy (eio_req *grp);
		124	#define EIO_DESTROY(req) req_destroy (req)
		125
		126	#include "libeio/eio.c"
		127
		128	#if !HAVE_POSIX_FADVISE
		129	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		130	#endif
		131
		132	#if !HAVE_POSIX_MADVISE
		133	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		134	#endif
		135
		136	#ifndef MAP_ANONYMOUS
		137	# ifdef MAP_ANON
		138	# define MAP_ANONYMOUS MAP_ANON
34	# else	139	# else
35	# error sendfile support requested but not available	140	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	141	# endif
37	#endif	142	#endif
38		143
39	/* used for struct dirent, AIX doesn't provide it */	144	/* defines all sorts of constants to 0 unless they are already defined */
40	#ifndef NAME_MAX	145	#include "def0.h"
41	# define NAME_MAX 4096
42	#endif
43		146
44	#if __ia64	147	#ifndef makedev
45	# define STACKSIZE 65536	148	# define makedev(maj,min) (((maj) << 8) | (min))
		149	#endif
		150	#ifndef major
		151	# define major(dev) ((dev) >> 8)
		152	#endif
		153	#ifndef minor
		154	# define minor(dev) ((dev) & 0xff)
		155	#endif
		156
		157	#ifndef PAGESIZE
		158	# define PAGESIZE sysconf (_SC_PAGESIZE)
		159	#endif
		160
		161	/*****************************************************************************/
		162
		163	static void
		164	fiemap (eio_req *req)
		165	{
		166	req->result = -1;
		167
		168	#if HAVE_FIEMAP
		169	int count = req->int3;
		170
		171	/* heuristic: first try with 64 extents if we don't know how many, */
		172	/* as most files have (hopefully) fewer than this many extents */
		173	/* in fact, most should have <= 2, so maybe the 72 below is probably overkill */
		174	if (count < 0)
		175	count = 72; /* for what it's worth, 72 extents fit nicely into 4kb */
		176
		177	for (;;)
		178	{
		179	struct fiemap *fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		180	errno = ENOMEM;
		181	if (!fiemap)
		182	return;
		183
		184	req->ptr1 = fiemap;
		185	req->flags |= EIO_FLAG_PTR1_FREE;
		186
		187	fiemap->fm_start = req->offs;
		188	fiemap->fm_length = req->size;
		189	fiemap->fm_flags = req->int2;
		190	fiemap->fm_extent_count = count;
		191
		192	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap))
		193	return;
		194
		195	if (req->int3 >= 0)
		196	break; /* when not autosizing we are done */
		197
		198	if (fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST)
		199	break; /* autosizing successful, we are done */
		200
		201	fiemap->fm_flags = req->int2;
		202	fiemap->fm_extent_count = 0;
		203
		204	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap))
		205	return;
		206
		207	count = fiemap->fm_mapped_extents;
		208
		209	free (fiemap);
		210	}
		211
		212	req->result = 0;
		213
46	#else	214	#else
47	# define STACKSIZE 8192	215	errno = ENOSYS;
48	#endif	216	#endif
		217	}
		218
		219	/*****************************************************************************/
49		220
50	enum {	221	enum {
51	REQ_QUIT,	222	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};	223	};
63		224
64	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"
66
67	typedef struct aio_cb
68	{
69	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;
76	SV *fh, *fh2;
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */
88	unsigned char cancelled;
89	} aio_cb;
90
91	typedef aio_cb *aio_req;	225	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	226	typedef eio_req *aio_req_ornot;
		227	typedef eio_wd aio_wd;
93		228
94	static int started, wanted;	229	static SV *on_next_submit;
95	static volatile int nreqs;	230	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	231	static int max_outstanding;
97	static int respipe [2];
98		232
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	233	static s_epipe respipe;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		234
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	235	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_free (aio_req req);	236	static void req_cancel (aio_req req);
		237
		238	static void
		239	want_poll (void)
		240	{
		241	/* write a dummy byte to the pipe so fh becomes ready */
		242	s_epipe_signal (&respipe);
		243	}
		244
		245	static void
		246	done_poll (void)
		247	{
		248	/* read any signals sent by the worker threads */
		249	s_epipe_drain (&respipe);
		250	}
107		251
108	/* must be called at most once */	252	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	253	static SV *
		254	req_sv (aio_req req, HV *stash)
110	{	255	{
111	if (!req->self)	256	if (!req->self)
112	{	257	{
113	req->self = (SV *)newHV ();	258	req->self = (SV *)newHV ();
114	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	259	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
115	}	260	}
116		261
117	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	262	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
118	}	263	}
119		264
120	static aio_req SvAIO_REQ (SV *sv)	265	static SV *
		266	newSVaio_wd (aio_wd wd)
121	{	267	{
122	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	268	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		269	}
		270
		271	static aio_req
		272	SvAIO_REQ (SV *sv)
		273	{
		274	MAGIC *mg;
		275
		276	if (!SvROK (sv)
		277	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		278	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		279	&& SvSTASH (SvRV (sv)) != aio_req_stash
		280	&& !sv_derived_from (sv, "IO::AIO::REQ")))
123	croak ("object of class " AIO_REQ_KLASS " expected");	281	croak ("object of class IO::AIO::REQ expected");
124		282
125	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	283	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
126		284
127	return mg ? (aio_req)mg->mg_ptr : 0;	285	return mg ? (aio_req)mg->mg_ptr : 0;
128	}	286	}
129		287
		288	static aio_wd
		289	SvAIO_WD (SV *sv)
		290	{
		291	if (!SvROK (sv)
		292	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		293	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		294	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		295
		296	return (aio_wd)(long)SvIVX (SvRV (sv));
		297	}
		298
		299	static void
130	static void aio_grp_feed (aio_req grp)	300	aio_grp_feed (aio_req grp)
131	{	301	{
132	while (grp->length < grp->fd2)	302	if (grp->sv2 && SvOK (grp->sv2))
133	{	303	{
134	int old_len = grp->length;	304	dSP;
135		305
136	if (grp->fh2 && SvOK (grp->fh2))	306	ENTER;
		307	SAVETMPS;
		308	PUSHMARK (SP);
		309	XPUSHs (req_sv (grp, aio_grp_stash));
		310	PUTBACK;
		311	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		312	SPAGAIN;
		313	FREETMPS;
		314	LEAVE;
		315	}
		316	}
		317
		318	static void
		319	req_submit (eio_req *req)
		320	{
		321	eio_submit (req);
		322
		323	if (expect_false (on_next_submit))
		324	{
		325	dSP;
		326	SV *cb = sv_2mortal (on_next_submit);
		327
		328	on_next_submit = 0;
		329
		330	PUSHMARK (SP);
		331	PUTBACK;
		332	call_sv (cb, G_DISCARD | G_EVAL);
		333	}
		334	}
		335
		336	static int
		337	req_invoke (eio_req *req)
		338	{
		339	if (req->flags & FLAG_SV2_RO_OFF)
		340	SvREADONLY_off (req->sv2);
		341
		342	if (!EIO_CANCELLED (req) && req->callback)
		343	{
		344	dSP;
		345	static SV *sv_result_cache; /* caches the result integer SV */
		346	SV *sv_result;
		347
		348	ENTER;
		349	SAVETMPS;
		350	PUSHMARK (SP);
		351	EXTEND (SP, 1);
		352
		353	/* do not recreate the result IV from scratch each time */
		354	if (expect_true (sv_result_cache))
137	{	355	{
138	dSP;	356	sv_result = sv_result_cache; sv_result_cache = 0;
139		357	SvIV_set (sv_result, req->result);
140	ENTER;	358	SvIOK_only (sv_result);
141	SAVETMPS;
142	PUSHMARK (SP);
143	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
144	PUTBACK;
145	call_sv (grp->fh2, G_VOID | G_EVAL);
146	SPAGAIN;
147	FREETMPS;
148	LEAVE;
149	}	359	}
150		360	else
151	/* stop if no progress has been made */
152	if (old_len == grp->length)
153	{	361	{
154	SvREFCNT_dec (grp->fh2);	362	sv_result = newSViv (req->result);
155	grp->fh2 = 0;	363	SvREADONLY_on (sv_result);
156	break;
157	}	364	}
		365
		366	switch (req->type)
		367	{
		368	case EIO_WD_OPEN:
		369	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		370	break;
		371
		372	case EIO_READDIR:
		373	{
		374	SV *rv = &PL_sv_undef;
		375
		376	if (req->result >= 0)
		377	{
		378	int i;
		379	char *names = (char *)req->ptr2;
		380	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		381	AV *av = newAV ();
		382
		383	av_extend (av, req->result - 1);
		384
		385	for (i = 0; i < req->result; ++i)
		386	{
		387	if (req->int1 & EIO_READDIR_DENTS)
		388	{
		389	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		390
		391	if (req->int1 & EIO_READDIR_CUSTOM2)
		392	{
		393	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		394	AV *avent = newAV ();
		395
		396	av_extend (avent, 2);
		397
		398	if (!sv_type [ent->type])
		399	{
		400	sv_type [ent->type] = newSViv (ent->type);
		401	SvREADONLY_on (sv_type [ent->type]);
		402	}
		403
		404	av_store (avent, 0, namesv);
		405	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		406	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		407
		408	av_store (av, i, newRV_noinc ((SV *)avent));
		409	}
		410	else
		411	av_store (av, i, namesv);
		412
		413	++ent;
		414	}
		415	else
		416	{
		417	SV *name = newSVpv (names, 0);
		418	av_store (av, i, name);
		419	names += SvCUR (name) + 1;
		420	}
		421	}
		422
		423	rv = sv_2mortal (newRV_noinc ((SV *)av));
		424	}
		425
		426	PUSHs (rv);
		427
		428	if (req->int1 & EIO_READDIR_CUSTOM1)
		429	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		430	}
		431	break;
		432
		433	case EIO_OPEN:
		434	{
		435	/* convert fd to fh */
		436	SV *fh = &PL_sv_undef;
		437
		438	if (req->result >= 0)
		439	{
		440	GV *gv = (GV *)sv_newmortal ();
		441	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		442	char sym [64];
		443	int symlen;
		444
		445	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		446	gv_init (gv, aio_stash, sym, symlen, 0);
		447
		448	symlen = snprintf (
		449	sym,
		450	sizeof (sym),
		451	"%s&=%d",
		452	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		453	(int)req->result
		454	);
		455
		456	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		457	fh = (SV *)gv;
		458	}
		459
		460	PUSHs (fh);
		461	}
		462	break;
		463
		464	case EIO_STATVFS:
		465	case EIO_FSTATVFS:
		466	{
		467	SV *rv = &PL_sv_undef;
		468
		469	#ifndef _WIN32
		470	if (req->result >= 0)
		471	{
		472	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		473	HV *hv = newHV ();
		474
		475	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		476
		477	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		478	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		479	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		480	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		481	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		482	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		483	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		484	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		485	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		486	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		487	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		488	}
		489	#endif
		490
		491	PUSHs (rv);
		492	}
		493
		494	break;
		495
		496	case EIO_GROUP:
		497	req->int1 = 2; /* mark group as finished */
		498
		499	if (req->sv1)
		500	{
		501	int i;
		502	AV *av = (AV *)req->sv1;
		503
		504	EXTEND (SP, AvFILL (av) + 1);
		505	for (i = 0; i <= AvFILL (av); ++i)
		506	PUSHs (*av_fetch (av, i, 0));
		507	}
		508	break;
		509
		510	case EIO_NOP:
		511	case EIO_BUSY:
		512	break;
		513
		514	case EIO_READLINK:
		515	case EIO_REALPATH:
		516	if (req->result > 0)
		517	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		518	break;
		519
		520	case EIO_STAT:
		521	case EIO_LSTAT:
		522	case EIO_FSTAT:
		523	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		524
		525	if (!(PL_laststatval = req->result))
		526	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		527	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		528
		529	PUSHs (sv_result);
		530	break;
		531
		532	case EIO_SEEK:
		533	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		534	break;
		535
		536	case EIO_READ:
		537	{
		538	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		539	*SvEND (req->sv2) = 0;
		540	SvPOK_only (req->sv2);
		541	SvSETMAGIC (req->sv2);
		542	PUSHs (sv_result);
		543	}
		544	break;
		545
		546	case EIO_CUSTOM:
		547	if (req->feed == fiemap)
		548	{
		549	#if HAVE_FIEMAP
		550	if (!req->result)
		551	{
		552	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		553
		554	if (fiemap->fm_extent_count)
		555	{
		556	AV *av = newAV ();
		557	int i;
		558
		559	while (fiemap->fm_mapped_extents)
		560	{
		561	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		562	AV *ext_av = newAV ();
		563
		564	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		565	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		566	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		567	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		568
		569	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		570	}
		571
		572	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		573	}
		574	else
		575	{
		576	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		577	PUSHs (sv_result);
		578	}
		579	}
		580	#endif
		581	}
		582	else
		583	PUSHs (sv_result);
		584	break;
		585
		586	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		587	if (req->result > 0)
		588	SvIV_set (sv_result, 0);
		589	/* FALLTHROUGH */
		590
		591	default:
		592	PUSHs (sv_result);
		593	break;
		594	}
		595
		596	errno = req->errorno;
		597
		598	PUTBACK;
		599	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		600	SPAGAIN;
		601
		602	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		603	SvREFCNT_dec (sv_result);
		604	else
		605	sv_result_cache = sv_result;
		606
		607	FREETMPS;
		608	LEAVE;
		609
		610	PUTBACK;
158	}	611	}
159	}
160		612
161	static void poll_wait ()	613	return !!SvTRUE (ERRSV);
162	{
163	if (nreqs && !ress)
164	{
165	fd_set rfd;
166	FD_ZERO(&rfd);
167	FD_SET(respipe [0], &rfd);
168
169	select (respipe [0] + 1, &rfd, 0, 0, 0);
170	}
171	}	614	}
172		615
173	static void req_invoke (aio_req req)	616	static void
		617	req_destroy (aio_req req)
174	{	618	{
175	dSP;
176	int errorno = errno;
177
178	if (req->cancelled || !SvOK (req->callback))
179	return;
180
181	errno = req->errorno;
182
183	ENTER;
184	SAVETMPS;
185	PUSHMARK (SP);
186	EXTEND (SP, 1);
187
188	switch (req->type)
189	{
190	case REQ_READDIR:
191	{
192	SV *rv = &PL_sv_undef;
193
194	if (req->result >= 0)
195	{
196	char *buf = req->data2ptr;
197	AV *av = newAV ();
198
199	while (req->result)
200	{
201	SV *sv = newSVpv (buf, 0);
202
203	av_push (av, sv);
204	buf += SvCUR (sv) + 1;
205	req->result--;
206	}
207
208	rv = sv_2mortal (newRV_noinc ((SV *)av));
209	}
210
211	PUSHs (rv);
212	}
213	break;
214
215	case REQ_OPEN:
216	{
217	/* convert fd to fh */
218	SV *fh;
219
220	PUSHs (sv_2mortal (newSViv (req->result)));
221	PUTBACK;
222	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
223	SPAGAIN;
224
225	fh = SvREFCNT_inc (POPs);
226
227	PUSHMARK (SP);
228	XPUSHs (sv_2mortal (fh));
229	}
230	break;
231
232	case REQ_GROUP:
233	req->fd = 2; /* mark group as finished */
234
235	if (req->data)
236	{
237	int i;
238	AV *av = (AV *)req->data;
239
240	EXTEND (SP, AvFILL (av) + 1);
241	for (i = 0; i <= AvFILL (av); ++i)
242	PUSHs (*av_fetch (av, i, 0));
243	}
244	break;
245
246	case REQ_SLEEP:
247	break;
248
249	default:
250	PUSHs (sv_2mortal (newSViv (req->result)));
251	break;
252	}
253
254
255	PUTBACK;
256	call_sv (req->callback, G_VOID | G_EVAL);
257	SPAGAIN;
258
259	if (SvTRUE (ERRSV))
260	{
261	req_free (req);
262	croak (0);
263	}
264
265	FREETMPS;
266	LEAVE;
267
268	errno = errorno;
269	}
270
271	static void req_free (aio_req req)
272	{
273	if (req->grp)
274	{
275	aio_req grp = req->grp;
276
277	/* unlink request */
278	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
279	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
280
281	if (grp->grp_first == req)
282	grp->grp_first = req->grp_next;
283
284	--grp->length;
285
286	/* call feeder, if applicable */
287	aio_grp_feed (grp);
288
289	/* finish, if done */
290	if (!grp->length && grp->fd)
291	{
292	req_invoke (grp);
293	req_free (grp);
294	}
295	}
296
297	if (req->self)	619	if (req->self)
298	{	620	{
299	sv_unmagic (req->self, PERL_MAGIC_ext);	621	sv_unmagic (req->self, PERL_MAGIC_ext);
300	SvREFCNT_dec (req->self);	622	SvREFCNT_dec (req->self);
301	}	623	}
302		624
303	SvREFCNT_dec (req->data);
304	SvREFCNT_dec (req->fh);	625	SvREFCNT_dec (req->sv1);
305	SvREFCNT_dec (req->fh2);	626	SvREFCNT_dec (req->sv2);
		627	SvREFCNT_dec (req->sv3);
		628	SvREFCNT_dec (req->sv4);
306	SvREFCNT_dec (req->callback);	629	SvREFCNT_dec (req->callback);
307	Safefree (req->statdata);
308		630
309	if (req->type == REQ_READDIR && req->result >= 0)
310	free (req->data2ptr);
311
312	Safefree (req);	631	free (req);
313	}	632	}
314		633
315	static void req_cancel (aio_req req)	634	static void
		635	req_cancel_subs (aio_req grp)
316	{	636	{
317	req->cancelled = 1;
318
319	if (req->type == REQ_GROUP)	637	if (grp->type != EIO_GROUP)
		638	return;
		639
		640	SvREFCNT_dec (grp->sv2);
		641	grp->sv2 = 0;
		642
		643	eio_grp_cancel (grp);
		644	}
		645
		646	static void ecb_cold
		647	create_respipe (void)
		648	{
		649	if (s_epipe_renew (&respipe))
		650	croak ("IO::AIO: unable to initialize result pipe");
		651	}
		652
		653	static void
		654	poll_wait (void)
		655	{
		656	while (eio_nreqs ())
320	{	657	{
321	aio_req sub;	658	int size;
322		659
323	for (sub = req->grp_first; sub; sub = sub->grp_next)	660	X_LOCK (reslock);
324	req_cancel (sub);	661	size = res_queue.size;
		662	X_UNLOCK (reslock);
		663
		664	if (size)
		665	return;
		666
		667	etp_maybe_start_thread ();
		668
		669	s_epipe_wait (&respipe);
325	}	670	}
326	}	671	}
327		672
328	static int poll_cb ()	673	static int
		674	poll_cb (void)
329	{	675	{
330	dSP;
331	int count = 0;
332	int do_croak = 0;
333	aio_req req;
334
335	for (;;)	676	for (;;)
336	{	677	{
337	pthread_mutex_lock (&reslock);	678	int res = eio_poll ();
338	req = ress;
339		679
340	if (req)	680	if (res > 0)
		681	croak (0);
		682
		683	if (!max_outstanding || max_outstanding > eio_nreqs ())
		684	return res;
		685
		686	poll_wait ();
		687	}
		688	}
		689
		690	static void ecb_cold
		691	reinit (void)
		692	{
		693	create_respipe ();
		694
		695	if (eio_init (want_poll, done_poll) < 0)
		696	croak ("IO::AIO: unable to initialise eio library");
		697	}
		698
		699	/*****************************************************************************/
		700
		701	#if !_POSIX_MAPPED_FILES
		702	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		703	# define munmap(addr,length) (errno = ENOSYS, -1)
		704	#endif
		705
		706	#if !_POSIX_MEMORY_PROTECTION
		707	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		708	# define PROT_NONE 0
		709	# define PROT_WRITE 0
		710	# define MAP_PRIVATE 0
		711	# define MAP_SHARED 0
		712	# define MAP_FIXED 0
		713	#endif
		714
		715	#define MMAP_MAGIC PERL_MAGIC_ext
		716
		717	static int ecb_cold
		718	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		719	{
		720	int old_errno = errno;
		721	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		722	errno = old_errno;
		723
		724	mg->mg_obj = 0; /* just in case */
		725
		726	SvREADONLY_off (sv);
		727
		728	if (SvPVX (sv) != mg->mg_ptr)
		729	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		730
		731	SvCUR_set (sv, 0);
		732	SvPVX (sv) = 0;
		733	SvOK_off (sv);
		734
		735	return 0;
		736	}
		737
		738	static MGVTBL mmap_vtbl = {
		739	0, 0, 0, 0, mmap_free
		740	};
		741
		742	/*****************************************************************************/
		743
		744	static SV *
		745	get_cb (SV *cb_sv)
		746	{
		747	SvGETMAGIC (cb_sv);
		748	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		749	}
		750
		751	static aio_req ecb_noinline
		752	dreq (SV *callback)
		753	{
		754	SV *cb_cv;
		755	aio_req req;
		756	int req_pri = next_pri;
		757	next_pri = EIO_PRI_DEFAULT;
		758
		759	cb_cv = get_cb (callback);
		760
		761	req = calloc (sizeof (*req), 1);
		762	if (!req)
		763	croak ("out of memory during eio_req allocation");
		764
		765	req->callback = SvREFCNT_inc (cb_cv);
		766	req->pri = req_pri;
		767
		768	return req;
		769	}
		770
		771	#define dREQ \
		772	aio_req req = dreq (callback); \
		773
		774	#define REQ_SEND \
		775	PUTBACK; \
		776	req_submit (req); \
		777	SPAGAIN; \
		778	\
		779	if (GIMME_V != G_VOID) \
		780	XPUSHs (req_sv (req, aio_req_stash));
		781
		782	ecb_inline void
		783	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		784	{
		785	if (expect_false (SvROK (path)))
		786	{
		787	SV *rv = SvRV (path);
		788	SV *wdob;
		789
		790	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
341	{	791	{
342	ress = req->next;	792	path = AvARRAY (rv)[1];
		793	wdob = AvARRAY (rv)[0];
343		794
344	if (!ress)	795	if (SvOK (wdob))
345	{	796	{
346	/* read any signals sent by the worker threads */	797	*wd = SvAIO_WD (wdob);
347	char buf [32];	798	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
348	while (read (respipe [0], buf, 32) == 32)
349	;
350
351	rese = 0;
352	}	799	}
		800	else
		801	*wd = EIO_INVALID_WD;
353	}	802	}
354		803	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
355	pthread_mutex_unlock (&reslock);
356
357	if (!req)
358	break;
359
360	nreqs--;
361
362	if (req->type == REQ_QUIT)
363	started--;
364	else if (req->type == REQ_GROUP && req->length)
365	{	804	{
366	req->fd = 1; /* mark request as delayed */	805	*wd = (aio_wd)(long)SvIVX (rv);
367	continue;	806	*wdsv = SvREFCNT_inc_NN (rv);
		807	*ptr = ".";
		808	return; /* path set to "." */
368	}	809	}
369	else	810	else
370	{	811	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
371	if (req->type == REQ_READ)
372	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
373
374	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
375	SvREADONLY_off (req->data);
376
377	if (req->statdata)
378	{
379	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
380	PL_laststatval = req->result;
381	PL_statcache = *(req->statdata);
382	}
383
384	req_invoke (req);
385
386	count++;
387	}
388
389	req_free (req);
390	}	812	}
391		813
392	return count;	814	*pathsv = newSVsv (path);
		815	*ptr = SvPVbyte_nolen (*pathsv);
393	}	816	}
394		817
395	static void *aio_proc(void *arg);	818	static void ecb_noinline
396		819	req_set_path1 (aio_req req, SV *path)
397	static void start_thread (void)
398	{	820	{
399	sigset_t fullsigset, oldsigset;	821	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
400	pthread_t tid;
401	pthread_attr_t attr;
402
403	pthread_attr_init (&attr);
404	pthread_attr_setstacksize (&attr, STACKSIZE);
405	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
406
407	sigfillset (&fullsigset);
408	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
409
410	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
411	started++;
412
413	sigprocmask (SIG_SETMASK, &oldsigset, 0);
414	}	822	}
415		823
416	static void req_send (aio_req req)	824	static void ecb_noinline
		825	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
417	{	826	{
418	while (started < wanted && nreqs >= started)	827	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
419	start_thread ();
420		828
421	nreqs++;	829	switch (SvTYPE (rv))
422
423	pthread_mutex_lock (&reqlock);
424
425	req->next = 0;
426
427	if (reqe)
428	{	830	{
429	reqe->next = req;	831	case SVt_PVIO:
430	reqe = req;	832	case SVt_PVLV:
		833	case SVt_PVGV:
		834	req->type = type_fh;
		835	req->sv1 = newSVsv (fh_or_path);
		836	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		837	break;
		838
		839	default:
		840	req->type = type_path;
		841	req_set_path1 (req, fh_or_path);
		842	break;
431	}	843	}
432	else
433	reqe = reqs = req;
434
435	pthread_cond_signal (&reqwait);
436	pthread_mutex_unlock (&reqlock);
437
438	if (nreqs > max_outstanding)
439	for (;;)
440	{
441	poll_cb ();
442
443	if (nreqs <= max_outstanding)
444	break;
445
446	poll_wait ();
447	}
448	}	844	}
449		845
450	static void end_thread (void)	846	XS(boot_IO__AIO) ecb_cold;
451	{
452	aio_req req;
453	Newz (0, req, 1, aio_cb);
454	req->type = REQ_QUIT;
455		847
456	req_send (req);	848	MODULE = IO::AIO PACKAGE = IO::AIO
457	}
458		849
459	static void min_parallel (int nthreads)	850	PROTOTYPES: ENABLE
460	{
461	if (wanted < nthreads)
462	wanted = nthreads;
463	}
464		851
465	static void max_parallel (int nthreads)	852	BOOT:
466	{	853	{
467	int cur = started;	854	static const struct {
		855	const char *name;
		856	IV iv;
		857	} *civ, const_iv[] = {
		858	# define const_niv(name, value) { # name, (IV) value },
		859	# define const_iv(name) { # name, (IV) name },
		860	# define const_eio(name) { # name, (IV) EIO_ ## name },
468		861
469	if (wanted > nthreads)	862	/* you have to re-run ./gendef0 after adding/Removing any constants here */
470	wanted = nthreads;
471		863
472	while (cur > wanted)	864	const_iv (ENOSYS)
473	{	865	const_iv (EXDEV)
474	end_thread ();	866	const_iv (EBADR)
475	cur--;
476	}
477		867
478	while (started > wanted)	868	const_iv (O_RDONLY)
479	{	869	const_iv (O_WRONLY)
480	poll_wait ();	870	const_iv (O_RDWR)
481	poll_cb ();	871	const_iv (O_CREAT)
482	}	872	const_iv (O_TRUNC)
483	}	873	const_iv (O_EXCL)
		874	const_iv (O_APPEND)
484		875
485	static void create_pipe ()	876	const_iv (O_ASYNC)
486	{	877	const_iv (O_DIRECT)
487	if (pipe (respipe))	878	const_iv (O_NOATIME)
488	croak ("unable to initialize result pipe");
489		879
490	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	880	const_iv (O_CLOEXEC)
491	croak ("cannot set result pipe to nonblocking mode");	881	const_iv (O_NOCTTY)
		882	const_iv (O_NOFOLLOW)
		883	const_iv (O_NONBLOCK)
		884	const_iv (O_EXEC)
		885	const_iv (O_SEARCH)
		886	const_iv (O_DIRECTORY)
		887	const_iv (O_DSYNC)
		888	const_iv (O_RSYNC)
		889	const_iv (O_SYNC)
		890	const_iv (O_TTY_INIT)
492		891
493	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	892	const_iv (S_IFIFO)
494	croak ("cannot set result pipe to nonblocking mode");	893	const_iv (S_IFCHR)
495	}	894	const_iv (S_IFBLK)
		895	const_iv (S_IFLNK)
		896	const_iv (S_IFREG)
		897	const_iv (S_IFDIR)
		898	const_iv (S_IFWHT)
		899	const_iv (S_IFSOCK)
		900	const_iv (S_IFMT)
496		901
497	/*****************************************************************************/	902	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
498	/* work around various missing functions */	903	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		904	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		905	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		906	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		907	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
499		908
500	#if !HAVE_PREADWRITE	909	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
501	# define pread aio_pread	910	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
502	# define pwrite aio_pwrite	911	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		912	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		913	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
503		914
504	/*	915	const_iv (ST_RDONLY)
505	* make our pread/pwrite safe against themselves, but not against	916	const_iv (ST_NOSUID)
506	* normal read/write by using a mutex. slows down execution a lot,	917	const_iv (ST_NODEV)
507	* but that's your problem, not mine.	918	const_iv (ST_NOEXEC)
508	*/	919	const_iv (ST_SYNCHRONOUS)
509	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	920	const_iv (ST_MANDLOCK)
		921	const_iv (ST_WRITE)
		922	const_iv (ST_APPEND)
		923	const_iv (ST_IMMUTABLE)
		924	const_iv (ST_NOATIME)
		925	const_iv (ST_NODIRATIME)
		926	const_iv (ST_RELATIME)
510		927
511	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	928	const_iv (PROT_NONE)
512	{	929	const_iv (PROT_EXEC)
513	ssize_t res;	930	const_iv (PROT_READ)
514	off_t ooffset;	931	const_iv (PROT_WRITE)
515		932
516	pthread_mutex_lock (&preadwritelock);	933	/*const_iv (MAP_FIXED)*/
517	ooffset = lseek (fd, 0, SEEK_CUR);	934	const_iv (MAP_PRIVATE)
518	lseek (fd, offset, SEEK_SET);	935	const_iv (MAP_SHARED)
519	res = read (fd, buf, count);	936	const_iv (MAP_ANONYMOUS)
520	lseek (fd, ooffset, SEEK_SET);
521	pthread_mutex_unlock (&preadwritelock);
522		937
523	return res;	938	/* linuxish */
524	}	939	const_iv (MAP_HUGETLB)
		940	const_iv (MAP_LOCKED)
		941	const_iv (MAP_NORESERVE)
		942	const_iv (MAP_POPULATE)
		943	const_iv (MAP_NONBLOCK)
525		944
526	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	945	const_iv (FIEMAP_FLAG_SYNC)
527	{	946	const_iv (FIEMAP_FLAG_XATTR)
528	ssize_t res;	947	const_iv (FIEMAP_FLAGS_COMPAT)
529	off_t ooffset;	948	const_iv (FIEMAP_EXTENT_LAST)
		949	const_iv (FIEMAP_EXTENT_UNKNOWN)
		950	const_iv (FIEMAP_EXTENT_DELALLOC)
		951	const_iv (FIEMAP_EXTENT_ENCODED)
		952	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		953	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		954	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		955	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		956	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		957	const_iv (FIEMAP_EXTENT_MERGED)
		958	const_iv (FIEMAP_EXTENT_SHARED)
530		959
531	pthread_mutex_lock (&preadwritelock);	960	const_eio (SEEK_SET)
532	ooffset = lseek (fd, 0, SEEK_CUR);	961	const_eio (SEEK_CUR)
533	lseek (fd, offset, SEEK_SET);	962	const_eio (SEEK_END)
534	res = write (fd, buf, count);
535	lseek (fd, offset, SEEK_SET);
536	pthread_mutex_unlock (&preadwritelock);
537		963
538	return res;	964	const_eio (MCL_FUTURE)
539	}	965	const_eio (MCL_CURRENT)
540	#endif
541		966
542	#if !HAVE_FDATASYNC	967	const_eio (MS_ASYNC)
543	# define fdatasync fsync	968	const_eio (MS_INVALIDATE)
544	#endif	969	const_eio (MS_SYNC)
545		970
546	#if !HAVE_READAHEAD	971	const_eio (MT_MODIFY)
547	# define readahead aio_readahead
548		972
549	static ssize_t readahead (int fd, off_t offset, size_t count)	973	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
550	{	974	const_eio (SYNC_FILE_RANGE_WRITE)
551	char readahead_buf[4096];	975	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
552		976
553	while (count > 0)	977	const_eio (FALLOC_FL_KEEP_SIZE)
554	{
555	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
556		978
557	pread (fd, readahead_buf, len, offset);	979	const_eio (READDIR_DENTS)
558	offset += len;	980	const_eio (READDIR_DIRS_FIRST)
559	count -= len;	981	const_eio (READDIR_STAT_ORDER)
560	}	982	const_eio (READDIR_FOUND_UNKNOWN)
561		983
562	errno = 0;	984	const_eio (DT_UNKNOWN)
563	}	985	const_eio (DT_FIFO)
564	#endif	986	const_eio (DT_CHR)
565		987	const_eio (DT_DIR)
566	#if !HAVE_READDIR_R	988	const_eio (DT_BLK)
567	# define readdir_r aio_readdir_r	989	const_eio (DT_REG)
568		990	const_eio (DT_LNK)
569	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	991	const_eio (DT_SOCK)
570		992	const_eio (DT_WHT)
571	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
572	{
573	struct dirent *e;
574	int errorno;
575
576	pthread_mutex_lock (&readdirlock);
577
578	e = readdir (dirp);
579	errorno = errno;
580
581	if (e)
582	{
583	*res = ent;
584	strcpy (ent->d_name, e->d_name);
585	}
586	else
587	*res = 0;
588
589	pthread_mutex_unlock (&readdirlock);
590
591	errno = errorno;
592	return e ? 0 : -1;
593	}
594	#endif
595
596	/* sendfile always needs emulation */
597	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
598	{
599	ssize_t res;
600
601	if (!count)
602	return 0;
603
604	#if HAVE_SENDFILE
605	# if __linux
606	res = sendfile (ofd, ifd, &offset, count);
607
608	# elif __freebsd
609	/*
610	* Of course, the freebsd sendfile is a dire hack with no thoughts
611	* wasted on making it similar to other I/O functions.
612	*/
613	{
614	off_t sbytes;
615	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
616
617	if (res < 0 && sbytes)
618	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
619	res = sbytes;
620	}	993	};
621		994
622	# elif __hpux	995	aio_stash = gv_stashpv ("IO::AIO" , 1);
623	res = sendfile (ofd, ifd, offset, count, 0, 0);	996	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		997	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		998	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
624		999
625	# elif __solaris	1000	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
626	{	1001	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
627	struct sendfilevec vec;
628	size_t sbytes;
629		1002
630	vec.sfv_fd = ifd;	1003	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
631	vec.sfv_flag = 0;
632	vec.sfv_off = offset;
633	vec.sfv_len = count;
634		1004
635	res = sendfilev (ofd, &vec, 1, &sbytes);	1005	reinit ();
		1006	}
636		1007
637	if (res < 0 && sbytes)	1008	void
		1009	reinit ()
		1010	PROTOTYPE:
		1011
		1012	void
		1013	max_poll_reqs (unsigned int nreqs)
		1014	PROTOTYPE: $
		1015	CODE:
		1016	eio_set_max_poll_reqs (nreqs);
		1017
		1018	void
		1019	max_poll_time (double nseconds)
		1020	PROTOTYPE: $
		1021	CODE:
		1022	eio_set_max_poll_time (nseconds);
		1023
		1024	void
		1025	min_parallel (unsigned int nthreads)
		1026	PROTOTYPE: $
		1027	CODE:
		1028	eio_set_min_parallel (nthreads);
		1029
		1030	void
		1031	max_parallel (unsigned int nthreads)
		1032	PROTOTYPE: $
		1033	CODE:
		1034	eio_set_max_parallel (nthreads);
		1035
		1036	void
		1037	max_idle (unsigned int nthreads)
		1038	PROTOTYPE: $
		1039	CODE:
		1040	eio_set_max_idle (nthreads);
		1041
		1042	void
		1043	idle_timeout (unsigned int seconds)
		1044	PROTOTYPE: $
		1045	CODE:
		1046	eio_set_idle_timeout (seconds);
		1047
		1048	void
		1049	max_outstanding (unsigned int maxreqs)
		1050	PROTOTYPE: $
		1051	CODE:
		1052	max_outstanding = maxreqs;
		1053
		1054	void
		1055	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1056	PPCODE:
		1057	{
		1058	dREQ;
		1059
		1060	req->type = EIO_WD_OPEN;
		1061	req_set_path1 (req, pathname);
		1062
		1063	REQ_SEND;
		1064	}
		1065
		1066	void
		1067	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1068	PPCODE:
		1069	{
		1070	dREQ;
		1071
		1072	req->type = EIO_OPEN;
		1073	req_set_path1 (req, pathname);
		1074	req->int1 = flags;
		1075	req->int2 = mode;
		1076
		1077	REQ_SEND;
		1078	}
		1079
		1080	void
		1081	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1082	ALIAS:
		1083	aio_fsync = EIO_FSYNC
		1084	aio_fdatasync = EIO_FDATASYNC
		1085	aio_syncfs = EIO_SYNCFS
		1086	PPCODE:
		1087	{
		1088	int fd = s_fileno_croak (fh, 0);
		1089	dREQ;
		1090
		1091	req->type = ix;
		1092	req->sv1 = newSVsv (fh);
		1093	req->int1 = fd;
		1094
		1095	REQ_SEND;
		1096	}
		1097
		1098	void
		1099	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1100	PPCODE:
		1101	{
		1102	int fd = s_fileno_croak (fh, 0);
		1103	dREQ;
		1104
		1105	req->type = EIO_SYNC_FILE_RANGE;
		1106	req->sv1 = newSVsv (fh);
		1107	req->int1 = fd;
		1108	req->offs = offset;
638	res = sbytes;	1109	req->size = nbytes;
639	}	1110	req->int2 = flags;
640		1111
641	# endif	1112	REQ_SEND;
		1113	}
		1114
		1115	void
		1116	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1117	PPCODE:
		1118	{
		1119	int fd = s_fileno_croak (fh, 0);
		1120	dREQ;
		1121
		1122	req->type = EIO_FALLOCATE;
		1123	req->sv1 = newSVsv (fh);
		1124	req->int1 = fd;
		1125	req->int2 = mode;
		1126	req->offs = offset;
		1127	req->size = len;
		1128
		1129	REQ_SEND;
		1130	}
		1131
		1132	void
		1133	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1134	PPCODE:
		1135	{
		1136	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1137	int fd = s_fileno_croak (fh, 0);
		1138	dREQ;
		1139
		1140	if (expect_false (close_fd < 0))
		1141	{
		1142	int pipefd [2];
		1143
		1144	if (
		1145	#ifdef _WIN32
		1146	_pipe (pipefd, 1, _O_BINARY) < 0
642	#else	1147	#else
643	res = -1;	1148	pipe (pipefd) < 0
644	errno = ENOSYS;	1149	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
645	#endif	1150	#endif
646		1151	|| close (pipefd [1]) < 0
647	if (res < 0
648	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
649	#if __solaris
650	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
651	#endif
652	)
653	)
654	{
655	/* emulate sendfile. this is a major pain in the ass */
656	char buf[4096];
657	res = 0;
658
659	while (count)
660	{
661	ssize_t cnt;
662
663	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
664
665	if (cnt <= 0)
666	{	1152	)
667	if (cnt && !res) res = -1;	1153	abort (); /*D*/
668	break;
669	}
670		1154
671	cnt = write (ofd, buf, cnt);	1155	close_fd = pipefd [0];
672
673	if (cnt <= 0)
674	{
675	if (cnt && !res) res = -1;
676	break;
677	}
678
679	offset += cnt;
680	res += cnt;
681	count -= cnt;
682	}
683	}
684
685	return res;
686	}
687
688	/* read a full directory */
689	static int scandir_ (const char *path, void **namesp)
690	{
691	DIR *dirp = opendir (path);
692	union
693	{
694	struct dirent d;
695	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
696	} u;
697	struct dirent *entp;
698	char *name, *names;
699	int memlen = 4096;
700	int memofs = 0;
701	int res = 0;
702	int errorno;
703
704	if (!dirp)
705	return -1;
706
707	names = malloc (memlen);
708
709	for (;;)
710	{
711	errno = 0, readdir_r (dirp, &u.d, &entp);
712
713	if (!entp)
714	break;
715
716	name = entp->d_name;
717
718	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
719	{
720	int len = strlen (name) + 1;
721
722	res++;
723
724	while (memofs + len > memlen)
725	{
726	memlen *= 2;
727	names = realloc (names, memlen);
728	if (!names)
729	break;
730	}
731
732	memcpy (names + memofs, name, len);
733	memofs += len;
734	}
735	}
736
737	errorno = errno;
738	closedir (dirp);
739
740	if (errorno)
741	{
742	free (names);
743	errno = errorno;
744	res = -1;
745	}
746
747	*namesp = (void *)names;
748	return res;
749	}
750
751	/*****************************************************************************/
752
753	static void *aio_proc (void *thr_arg)
754	{
755	aio_req req;
756	int type;
757
758	do
759	{
760	pthread_mutex_lock (&reqlock);
761
762	for (;;)
763	{
764	req = reqs;
765
766	if (reqs)
767	{
768	reqs = reqs->next;
769	if (!reqs) reqe = 0;
770	}
771
772	if (req)
773	break;
774
775	pthread_cond_wait (&reqwait, &reqlock);
776	}
777
778	pthread_mutex_unlock (&reqlock);
779
780	errno = 0; /* strictly unnecessary */
781
782	if (!req->cancelled)
783	switch (req->type)
784	{
785	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
786	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
787
788	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
789	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
790
791	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
792	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
793	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
794
795	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
796	case REQ_CLOSE: req->result = close (req->fd); break;
797	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
798	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
799	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
800	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
801	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
802
803	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
804	case REQ_FSYNC: req->result = fsync (req->fd); break;
805	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
806
807	case REQ_SLEEP:
808	{
809	struct timeval tv;
810
811	tv.tv_sec = req->fd;
812	tv.tv_usec = req->fd2;
813
814	req->result = select (0, 0, 0, 0, &tv);
815	}
816
817	case REQ_QUIT:
818	break;
819
820	default:
821	req->result = ENOSYS;
822	break;
823	}	1156	}
824		1157
825	req->errorno = errno;	1158	req->type = EIO_DUP2;
826		1159	req->int1 = close_fd;
827	pthread_mutex_lock (&reslock);	1160	req->sv2 = newSVsv (fh);
828
829	req->next = 0;	1161	req->int2 = fd;
830		1162
831	if (rese)	1163	REQ_SEND;
832	{
833	rese->next = req;
834	rese = req;
835	}
836	else
837	{
838	rese = ress = req;
839
840	/* write a dummy byte to the pipe so fh becomes ready */
841	write (respipe [1], &respipe, 1);
842	}
843
844	pthread_mutex_unlock (&reslock);
845	}
846	while (type != REQ_QUIT);
847
848	return 0;
849	}	1164	}
850		1165
851	/*****************************************************************************/
852
853	static void atfork_prepare (void)
854	{
855	pthread_mutex_lock (&reqlock);
856	pthread_mutex_lock (&reslock);
857	#if !HAVE_PREADWRITE
858	pthread_mutex_lock (&preadwritelock);
859	#endif
860	#if !HAVE_READDIR_R
861	pthread_mutex_lock (&readdirlock);
862	#endif
863	}
864
865	static void atfork_parent (void)
866	{
867	#if !HAVE_READDIR_R
868	pthread_mutex_unlock (&readdirlock);
869	#endif
870	#if !HAVE_PREADWRITE
871	pthread_mutex_unlock (&preadwritelock);
872	#endif
873	pthread_mutex_unlock (&reslock);
874	pthread_mutex_unlock (&reqlock);
875	}
876
877	static void atfork_child (void)
878	{
879	aio_req prv;
880
881	started = 0;
882
883	while (reqs)
884	{
885	prv = reqs;
886	reqs = prv->next;
887	req_free (prv);
888	}
889
890	reqs = reqe = 0;
891
892	while (ress)
893	{
894	prv = ress;
895	ress = prv->next;
896	req_free (prv);
897	}
898
899	ress = rese = 0;
900
901	close (respipe [0]);
902	close (respipe [1]);
903	create_pipe ();
904
905	atfork_parent ();
906	}
907
908	#define dREQ \
909	aio_req req; \
910	\
911	if (SvOK (callback) && !SvROK (callback)) \
912	croak ("callback must be undef or of reference type"); \
913	\
914	Newz (0, req, 1, aio_cb); \
915	if (!req) \
916	croak ("out of memory during aio_req allocation"); \
917	\
918	req->callback = newSVsv (callback)
919
920	#define REQ_SEND \
921	req_send (req); \
922	\
923	if (GIMME_V != G_VOID) \
924	XPUSHs (req_sv (req, AIO_REQ_KLASS));
925
926	MODULE = IO::AIO PACKAGE = IO::AIO
927
928	PROTOTYPES: ENABLE
929
930	BOOT:
931	{
932	HV *stash = gv_stashpv ("IO::AIO", 1);
933	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
934	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
935	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
936
937	create_pipe ();
938	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
939	}
940
941	void	1166	void
942	min_parallel (nthreads)	1167	aio_seek (SV *fh, SV *offset, int whence, SV *callback=&PL_sv_undef)
943	int nthreads
944	PROTOTYPE: $
945
946	void
947	max_parallel (nthreads)
948	int nthreads
949	PROTOTYPE: $
950
951	int
952	max_outstanding (nreqs)
953	int nreqs
954	PROTOTYPE: $
955	CODE:	1168	PPCODE:
956	RETVAL = max_outstanding;
957	max_outstanding = nreqs;
958
959	void
960	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
961	SV * pathname
962	int flags
963	int mode
964	SV * callback
965	PROTOTYPE: $$$;$
966	PPCODE:
967	{	1169	{
		1170	int fd = s_fileno_croak (fh, 0);
968	dREQ;	1171	dREQ;
969		1172
970	req->type = REQ_OPEN;	1173	req->type = EIO_SEEK;
971	req->data = newSVsv (pathname);	1174	req->sv1 = newSVsv (fh);
972	req->dataptr = SvPVbyte_nolen (req->data);	1175	req->int1 = fd;
973	req->fd = flags;	1176	req->offs = SvVAL64 (offset);
974	req->mode = mode;	1177	req->int2 = whence;
975		1178
976	REQ_SEND;	1179	REQ_SEND;
977	}	1180	}
978		1181
979	void	1182	void
980	aio_close (fh,callback=&PL_sv_undef)	1183	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
981	SV * fh
982	SV * callback
983	PROTOTYPE: $;$
984	ALIAS:	1184	ALIAS:
985	aio_close = REQ_CLOSE
986	aio_fsync = REQ_FSYNC
987	aio_fdatasync = REQ_FDATASYNC
988	PPCODE:
989	{
990	dREQ;
991
992	req->type = ix;
993	req->fh = newSVsv (fh);
994	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
995
996	REQ_SEND (req);
997	}
998
999	void
1000	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1001	SV * fh
1002	UV offset
1003	UV length
1004	SV * data
1005	UV dataoffset
1006	SV * callback
1007	ALIAS:
1008	aio_read = REQ_READ	1185	aio_read = EIO_READ
1009	aio_write = REQ_WRITE	1186	aio_write = EIO_WRITE
1010	PROTOTYPE: $$$$$;$
1011	PPCODE:	1187	PPCODE:
1012	{	1188	{
1013	aio_req req;
1014	STRLEN svlen;	1189	STRLEN svlen;
		1190	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1015	char *svptr = SvPVbyte (data, svlen);	1191	char *svptr = SvPVbyte (data, svlen);
1016		1192	UV len = SvUV (length);
1017	SvUPGRADE (data, SVt_PV);
1018	SvPOK_on (data);
1019		1193
1020	if (dataoffset < 0)	1194	if (dataoffset < 0)
1021	dataoffset += svlen;	1195	dataoffset += svlen;
1022		1196
1023	if (dataoffset < 0 || dataoffset > svlen)	1197	if (dataoffset < 0 || dataoffset > svlen)
1024	croak ("data offset outside of string");	1198	croak ("dataoffset outside of data scalar");
1025		1199
1026	if (ix == REQ_WRITE)	1200	if (ix == EIO_WRITE)
1027	{	1201	{
1028	/* write: check length and adjust. */	1202	/* write: check length and adjust. */
1029	if (length < 0 || length + dataoffset > svlen)	1203	if (!SvOK (length) || len + dataoffset > svlen)
1030	length = svlen - dataoffset;	1204	len = svlen - dataoffset;
1031	}	1205	}
1032	else	1206	else
1033	{	1207	{
1034	/* read: grow scalar as necessary */	1208	/* read: check type and grow scalar as necessary */
		1209	SvUPGRADE (data, SVt_PV);
1035	svptr = SvGROW (data, length + dataoffset);	1210	svptr = SvGROW (data, len + dataoffset + 1);
1036	}	1211	}
1037
1038	if (length < 0)
1039	croak ("length must not be negative");
1040		1212
1041	{	1213	{
1042	dREQ;	1214	dREQ;
1043		1215
1044	req->type = ix;	1216	req->type = ix;
1045	req->fh = newSVsv (fh);	1217	req->sv1 = newSVsv (fh);
1046	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1218	req->int1 = fd;
1047	: IoOFP (sv_2io (fh)));	1219	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1048	req->offset = offset;	1220	req->size = len;
1049	req->length = length;
1050	req->data = SvREFCNT_inc (data);	1221	req->sv2 = SvREFCNT_inc (data);
1051	req->dataptr = (char *)svptr + dataoffset;	1222	req->ptr2 = (char *)svptr + dataoffset;
		1223	req->stroffset = dataoffset;
1052		1224
1053	if (!SvREADONLY (data))	1225	if (!SvREADONLY (data))
1054	{	1226	{
1055	SvREADONLY_on (data);	1227	SvREADONLY_on (data);
1056	req->data2ptr = (void *)data;	1228	req->flags |= FLAG_SV2_RO_OFF;
1057	}	1229	}
1058		1230
1059	REQ_SEND;	1231	REQ_SEND;
1060	}	1232	}
1061	}	1233	}
1062		1234
1063	void	1235	void
1064	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1236	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1065	SV * out_fh	1237	ALIAS:
1066	SV * in_fh	1238	aio_readlink = EIO_READLINK
1067	UV in_offset	1239	aio_realpath = EIO_REALPATH
1068	UV length
1069	SV * callback
1070	PROTOTYPE: $$$$;$
1071	PPCODE:	1240	PPCODE:
1072	{	1241	{
		1242	dREQ;
		1243
		1244	req->type = ix;
		1245	req_set_path1 (req, pathname);
		1246
		1247	REQ_SEND;
		1248	}
		1249
		1250	void
		1251	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1252	PPCODE:
		1253	{
		1254	int ifd = s_fileno_croak (in_fh , 0);
		1255	int ofd = s_fileno_croak (out_fh, 1);
1073	dREQ;	1256	dREQ;
1074		1257
1075	req->type = REQ_SENDFILE;	1258	req->type = EIO_SENDFILE;
1076	req->fh = newSVsv (out_fh);	1259	req->sv1 = newSVsv (out_fh);
1077	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1260	req->int1 = ofd;
1078	req->fh2 = newSVsv (in_fh);	1261	req->sv2 = newSVsv (in_fh);
1079	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1262	req->int2 = ifd;
1080	req->offset = in_offset;	1263	req->offs = in_offset;
1081	req->length = length;	1264	req->size = length;
1082		1265
1083	REQ_SEND;	1266	REQ_SEND;
1084	}	1267	}
1085		1268
1086	void	1269	void
1087	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1270	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1088	SV * fh
1089	UV offset
1090	IV length
1091	SV * callback
1092	PROTOTYPE: $$$;$
1093	PPCODE:	1271	PPCODE:
1094	{	1272	{
		1273	int fd = s_fileno_croak (fh, 0);
1095	dREQ;	1274	dREQ;
1096		1275
1097	req->type = REQ_READAHEAD;	1276	req->type = EIO_READAHEAD;
1098	req->fh = newSVsv (fh);	1277	req->sv1 = newSVsv (fh);
1099	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1278	req->int1 = fd;
1100	req->offset = offset;	1279	req->offs = offset;
1101	req->length = length;	1280	req->size = length;
1102		1281
1103	REQ_SEND;	1282	REQ_SEND;
1104	}	1283	}
1105		1284
1106	void	1285	void
1107	aio_stat (fh_or_path,callback=&PL_sv_undef)	1286	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1108	SV * fh_or_path
1109	SV * callback
1110	ALIAS:	1287	ALIAS:
1111	aio_stat = REQ_STAT	1288	aio_stat = EIO_STAT
1112	aio_lstat = REQ_LSTAT	1289	aio_lstat = EIO_LSTAT
		1290	aio_statvfs = EIO_STATVFS
1113	PPCODE:	1291	PPCODE:
1114	{	1292	{
1115	dREQ;	1293	dREQ;
1116		1294
1117	New (0, req->statdata, 1, Stat_t);	1295	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1118	if (!req->statdata)
1119	{
1120	req_free (req);
1121	croak ("out of memory during aio_req->statdata allocation");
1122	}
1123
1124	if (SvPOK (fh_or_path))
1125	{
1126	req->type = ix;
1127	req->data = newSVsv (fh_or_path);
1128	req->dataptr = SvPVbyte_nolen (req->data);
1129	}
1130	else
1131	{
1132	req->type = REQ_FSTAT;
1133	req->fh = newSVsv (fh_or_path);
1134	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1135	}
1136		1296
1137	REQ_SEND;	1297	REQ_SEND;
1138	}	1298	}
1139		1299
		1300	UV
		1301	major (UV dev)
		1302	ALIAS:
		1303	minor = 1
		1304	CODE:
		1305	RETVAL = ix ? major (dev) : minor (dev);
		1306	OUTPUT:
		1307	RETVAL
		1308
		1309	UV
		1310	makedev (UV maj, UV min)
		1311	CODE:
		1312	RETVAL = makedev (maj, min);
		1313	OUTPUT:
		1314	RETVAL
		1315
1140	void	1316	void
		1317	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1318	PPCODE:
		1319	{
		1320	dREQ;
		1321
		1322	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1323	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1324	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1325
		1326	REQ_SEND;
		1327	}
		1328
		1329	void
		1330	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1331	PPCODE:
		1332	{
		1333	dREQ;
		1334
		1335	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1336	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1337
		1338	REQ_SEND;
		1339	}
		1340
		1341	void
		1342	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1343	PPCODE:
		1344	{
		1345	dREQ;
		1346
		1347	req->int2 = mode;
		1348	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1349
		1350	REQ_SEND;
		1351	}
		1352
		1353	void
		1354	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1355	PPCODE:
		1356	{
		1357	dREQ;
		1358
		1359	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1360	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1361	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1362
		1363	REQ_SEND;
		1364	}
		1365
		1366	void
		1367	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1368	PPCODE:
		1369	{
		1370	dREQ;
		1371
		1372	req->type = EIO_READDIR;
		1373	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1374
		1375	if (flags & EIO_READDIR_DENTS)
		1376	req->int1 |= EIO_READDIR_CUSTOM2;
		1377
		1378	req_set_path1 (req, pathname);
		1379
		1380	REQ_SEND;
		1381	}
		1382
		1383	void
		1384	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1385	PPCODE:
		1386	{
		1387	dREQ;
		1388
		1389	req->type = EIO_MKDIR;
		1390	req->int2 = mode;
		1391	req_set_path1 (req, pathname);
		1392
		1393	REQ_SEND;
		1394	}
		1395
		1396	void
1141	aio_unlink (pathname,callback=&PL_sv_undef)	1397	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1142	SV * pathname
1143	SV * callback
1144	ALIAS:	1398	ALIAS:
1145	aio_unlink = REQ_UNLINK	1399	aio_unlink = EIO_UNLINK
1146	aio_rmdir = REQ_RMDIR	1400	aio_rmdir = EIO_RMDIR
1147	aio_readdir = REQ_READDIR	1401	aio_readdir = EIO_READDIR
1148	PPCODE:	1402	PPCODE:
1149	{	1403	{
1150	dREQ;	1404	dREQ;
1151		1405
1152	req->type = ix;	1406	req->type = ix;
1153	req->data = newSVsv (pathname);	1407	req_set_path1 (req, pathname);
1154	req->dataptr = SvPVbyte_nolen (req->data);	1408
1155
1156	REQ_SEND;	1409	REQ_SEND;
1157	}	1410	}
1158		1411
1159	void	1412	void
1160	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1413	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1161	SV * oldpath
1162	SV * newpath
1163	SV * callback
1164	ALIAS:	1414	ALIAS:
1165	aio_link = REQ_LINK	1415	aio_link = EIO_LINK
1166	aio_symlink = REQ_SYMLINK	1416	aio_symlink = EIO_SYMLINK
1167	aio_rename = REQ_RENAME	1417	aio_rename = EIO_RENAME
1168	PPCODE:	1418	PPCODE:
1169	{	1419	{
		1420	eio_wd wd2 = 0;
1170	dREQ;	1421	dREQ;
1171		1422
1172	req->type = ix;	1423	req->type = ix;
1173	req->fh = newSVsv (oldpath);	1424	req_set_path1 (req, oldpath);
1174	req->data2ptr = SvPVbyte_nolen (req->fh);	1425	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1175	req->data = newSVsv (newpath);	1426	req->int3 = (long)wd2;
1176	req->dataptr = SvPVbyte_nolen (req->data);
1177		1427
1178	REQ_SEND;	1428	REQ_SEND;
1179	}	1429	}
1180		1430
1181	void	1431	void
1182	aio_sleep (delay,callback=&PL_sv_undef)	1432	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1183	double delay
1184	SV * callback
1185	PPCODE:	1433	PPCODE:
1186	{	1434	{
1187	dREQ;	1435	dREQ;
1188		1436
1189	req->type = REQ_SLEEP;	1437	req->type = EIO_MKNOD;
1190	req->fd = delay < 0. ? 0 : delay;	1438	req->int2 = (mode_t)mode;
1191	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1439	req->offs = dev;
1192		1440	req_set_path1 (req, pathname);
		1441
1193	REQ_SEND;	1442	REQ_SEND;
1194	}	1443	}
1195		1444
1196	void	1445	void
1197	aio_group (callback=&PL_sv_undef)	1446	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1198	SV * callback	1447	ALIAS:
1199	PROTOTYPE: ;$	1448	aio_mtouch = EIO_MTOUCH
		1449	aio_msync = EIO_MSYNC
1200	PPCODE:	1450	PPCODE:
1201	{	1451	{
		1452	STRLEN svlen;
		1453	char *svptr = SvPVbyte (data, svlen);
		1454	UV len = SvUV (length);
		1455
		1456	if (offset < 0)
		1457	offset += svlen;
		1458
		1459	if (offset < 0 || offset > svlen)
		1460	croak ("offset outside of scalar");
		1461
		1462	if (!SvOK (length) || len + offset > svlen)
		1463	len = svlen - offset;
		1464
		1465	{
		1466	dREQ;
		1467
		1468	req->type = ix;
		1469	req->sv2 = SvREFCNT_inc (data);
		1470	req->ptr2 = (char *)svptr + offset;
		1471	req->size = len;
		1472	req->int1 = flags;
		1473
		1474	REQ_SEND;
		1475	}
		1476	}
		1477
		1478	void
		1479	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1480	PPCODE:
		1481	{
		1482	STRLEN svlen;
		1483	char *svptr = SvPVbyte (data, svlen);
		1484	UV len = SvUV (length);
		1485
		1486	if (offset < 0)
		1487	offset += svlen;
		1488
		1489	if (offset < 0 || offset > svlen)
		1490	croak ("offset outside of scalar");
		1491
		1492	if (!SvOK (length) || len + offset > svlen)
		1493	len = svlen - offset;
		1494
		1495	{
		1496	dREQ;
		1497
		1498	req->type = EIO_MLOCK;
		1499	req->sv2 = SvREFCNT_inc (data);
		1500	req->ptr2 = (char *)svptr + offset;
		1501	req->size = len;
		1502
		1503	REQ_SEND;
		1504	}
		1505	}
		1506
		1507	void
		1508	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1509	PPCODE:
		1510	{
		1511	dREQ;
		1512
		1513	req->type = EIO_MLOCKALL;
		1514	req->int1 = flags;
		1515
		1516	REQ_SEND;
		1517	}
		1518
		1519	void
		1520	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback=&PL_sv_undef)
		1521	PPCODE:
		1522	{
		1523	int fd = s_fileno_croak (fh, 0);
1202	dREQ;	1524	dREQ;
		1525
		1526	req->type = EIO_CUSTOM;
		1527	req->sv1 = newSVsv (fh);
		1528	req->int1 = fd;
		1529
		1530	req->feed = fiemap;
		1531	#if HAVE_FIEMAP
		1532	/* keep our fingers crossed that the next two types are 64 bit */
		1533	req->offs = start;
		1534	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1535	req->int2 = flags;
		1536	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1537	#endif
		1538
		1539	REQ_SEND;
		1540	}
		1541
		1542	void
		1543	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1544	PPCODE:
		1545	{
		1546	dREQ;
		1547
		1548	req->type = EIO_BUSY;
		1549	req->nv1 = delay < 0. ? 0. : delay;
		1550
		1551	REQ_SEND;
		1552	}
		1553
		1554	void
		1555	aio_group (SV *callback=&PL_sv_undef)
		1556	PPCODE:
		1557	{
		1558	dREQ;
		1559
1203	req->type = REQ_GROUP;	1560	req->type = EIO_GROUP;
		1561
1204	req_send (req);	1562	req_submit (req);
1205	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1563	XPUSHs (req_sv (req, aio_grp_stash));
1206	}	1564	}
		1565
		1566	void
		1567	aio_nop (SV *callback=&PL_sv_undef)
		1568	ALIAS:
		1569	aio_nop = EIO_NOP
		1570	aio_sync = EIO_SYNC
		1571	PPCODE:
		1572	{
		1573	dREQ;
		1574
		1575	req->type = ix;
		1576
		1577	REQ_SEND;
		1578	}
		1579
		1580	int
		1581	aioreq_pri (int pri = 0)
		1582	CODE:
		1583	RETVAL = next_pri;
		1584	if (items > 0)
		1585	{
		1586	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1587	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1588	next_pri = pri;
		1589	}
		1590	OUTPUT:
		1591	RETVAL
		1592
		1593	void
		1594	aioreq_nice (int nice = 0)
		1595	CODE:
		1596	nice = next_pri - nice;
		1597	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1598	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1599	next_pri = nice;
1207		1600
1208	void	1601	void
1209	flush ()	1602	flush ()
1210	PROTOTYPE:
1211	CODE:	1603	CODE:
1212	while (nreqs)	1604	while (eio_nreqs ())
1213	{	1605	{
1214	poll_wait ();	1606	poll_wait ();
1215	poll_cb ();	1607	poll_cb ();
1216	}	1608	}
1217		1609
1218	void	1610	int
1219	poll()	1611	poll ()
1220	PROTOTYPE:
1221	CODE:	1612	CODE:
1222	if (nreqs)
1223	{
1224	poll_wait ();	1613	poll_wait ();
1225	poll_cb ();	1614	RETVAL = poll_cb ();
1226	}
1227
1228	int
1229	poll_fileno()
1230	PROTOTYPE:
1231	CODE:
1232	RETVAL = respipe [0];
1233	OUTPUT:	1615	OUTPUT:
1234	RETVAL	1616	RETVAL
1235		1617
1236	int	1618	int
		1619	poll_fileno ()
		1620	CODE:
		1621	RETVAL = s_epipe_fd (&respipe);
		1622	OUTPUT:
		1623	RETVAL
		1624
		1625	int
1237	poll_cb(...)	1626	poll_cb (...)
1238	PROTOTYPE:	1627	PROTOTYPE:
1239	CODE:	1628	CODE:
1240	RETVAL = poll_cb ();	1629	RETVAL = poll_cb ();
1241	OUTPUT:	1630	OUTPUT:
1242	RETVAL	1631	RETVAL
1243		1632
1244	void	1633	void
1245	poll_wait()	1634	poll_wait ()
1246	PROTOTYPE:
1247	CODE:	1635	CODE:
1248	if (nreqs)
1249	poll_wait ();	1636	poll_wait ();
1250		1637
1251	int	1638	int
1252	nreqs()	1639	nreqs ()
1253	PROTOTYPE:
1254	CODE:	1640	CODE:
1255	RETVAL = nreqs;	1641	RETVAL = eio_nreqs ();
1256	OUTPUT:	1642	OUTPUT:
1257	RETVAL	1643	RETVAL
1258		1644
		1645	int
		1646	nready ()
		1647	CODE:
		1648	RETVAL = eio_nready ();
		1649	OUTPUT:
		1650	RETVAL
		1651
		1652	int
		1653	npending ()
		1654	CODE:
		1655	RETVAL = eio_npending ();
		1656	OUTPUT:
		1657	RETVAL
		1658
		1659	int
		1660	nthreads ()
		1661	CODE:
		1662	RETVAL = eio_nthreads ();
		1663	OUTPUT:
		1664	RETVAL
		1665
		1666	int
		1667	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1668	CODE:
		1669	RETVAL = posix_fadvise (fh, offset, length, advice);
		1670	OUTPUT:
		1671	RETVAL
		1672
		1673	IV
		1674	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1675	CODE:
		1676	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1677	OUTPUT:
		1678	RETVAL
		1679
		1680	void
		1681	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1682	PPCODE:
		1683	sv_unmagic (scalar, MMAP_MAGIC);
		1684	{
		1685	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1686	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1687	if (addr == (void *)-1)
		1688	XSRETURN_NO;
		1689
		1690	sv_force_normal (scalar);
		1691
		1692	/* we store the length in mg_obj, as namlen is I32 :/ */
		1693	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1694	->mg_obj = (SV *)length;
		1695
		1696	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1697
		1698	if (!(prot & PROT_WRITE))
		1699	SvREADONLY_on (scalar);
		1700
		1701	if (SvLEN (scalar))
		1702	Safefree (SvPVX (scalar));
		1703
		1704	SvPVX (scalar) = (char *)addr;
		1705	SvCUR_set (scalar, length);
		1706	SvLEN_set (scalar, 0);
		1707	SvPOK_only (scalar);
		1708
		1709	XSRETURN_YES;
		1710	}
		1711
		1712	void
		1713	munmap (SV *scalar)
		1714	CODE:
		1715	sv_unmagic (scalar, MMAP_MAGIC);
		1716
		1717	int
		1718	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1719	ALIAS:
		1720	mprotect = 1
		1721	CODE:
		1722	{
		1723	STRLEN svlen;
		1724	void *addr = SvPVbyte (scalar, svlen);
		1725	size_t len = SvUV (length);
		1726
		1727	if (offset < 0)
		1728	offset += svlen;
		1729
		1730	if (offset < 0 || offset > svlen)
		1731	croak ("offset outside of scalar");
		1732
		1733	if (!SvOK (length) || len + offset > svlen)
		1734	len = svlen - offset;
		1735
		1736	addr = (void *)(((intptr_t)addr) + offset);
		1737	eio_page_align (&addr, &len);
		1738
		1739	switch (ix)
		1740	{
		1741	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1742	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1743	}
		1744	}
		1745	OUTPUT:
		1746	RETVAL
		1747
		1748	int
		1749	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1750	CODE:
		1751	{
		1752	STRLEN svlen;
		1753	void *addr = SvPVbyte (scalar, svlen);
		1754	size_t len = SvUV (length);
		1755
		1756	if (offset < 0)
		1757	offset += svlen;
		1758
		1759	if (offset < 0 || offset > svlen)
		1760	croak ("offset outside of scalar");
		1761
		1762	if (!SvOK (length) || len + offset > svlen)
		1763	len = svlen - offset;
		1764
		1765	addr = (void *)(((intptr_t)addr) + offset);
		1766	eio_page_align (&addr, &len);
		1767	#if _POSIX_MEMLOCK_RANGE
		1768	RETVAL = munlock (addr, len);
		1769	#else
		1770	RETVAL = ((errno = ENOSYS), -1);
		1771	#endif
		1772	}
		1773	OUTPUT:
		1774	RETVAL
		1775
		1776	int
		1777	munlockall ()
		1778	CODE:
		1779	#if _POSIX_MEMLOCK
		1780	munlockall ();
		1781	#else
		1782	RETVAL = -1;
		1783	errno = ENOSYS;
		1784	#endif
		1785	OUTPUT:
		1786	RETVAL
		1787
		1788	void _on_next_submit (SV *cb)
		1789	CODE:
		1790	SvREFCNT_dec (on_next_submit);
		1791	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1792
1259	PROTOTYPES: DISABLE	1793	PROTOTYPES: DISABLE
1260		1794
		1795	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1796
		1797	BOOT:
		1798	{
		1799	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1800	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1801	}
		1802
		1803	void
		1804	DESTROY (SV *self)
		1805	CODE:
		1806	{
		1807	aio_wd wd = SvAIO_WD (self);
		1808	#if HAVE_AT
		1809	{
		1810	SV *callback = &PL_sv_undef;
		1811	dREQ; /* clobbers next_pri :/ */
		1812	next_pri = req->pri; /* restore next_pri */
		1813	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1814	req->type = EIO_WD_CLOSE;
		1815	req->wd = wd;
		1816	REQ_SEND;
		1817	}
		1818	#else
		1819	eio_wd_close_sync (wd);
		1820	#endif
		1821	}
		1822
1261	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1823	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1262		1824
1263	void	1825	void
1264	cancel (aio_req_ornot req)	1826	cancel (aio_req_ornot req)
1265	PROTOTYPE:
1266	CODE:	1827	CODE:
1267	req_cancel (req);	1828	eio_cancel (req);
		1829
		1830	void
		1831	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1832	PPCODE:
		1833	{
		1834	if (GIMME_V != G_VOID)
		1835	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1836
		1837	if (items > 1)
		1838	{
		1839	SV *cb_cv =get_cb (callback);
		1840
		1841	SvREFCNT_dec (req->callback);
		1842	req->callback = SvREFCNT_inc (cb_cv);
		1843	}
		1844	}
1268		1845
1269	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1846	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1270		1847
1271	void	1848	void
1272	add (aio_req grp, ...)	1849	add (aio_req grp, ...)
1273	PPCODE:	1850	PPCODE:
1274	{	1851	{
1275	int i;	1852	int i;
1276		1853
1277	if (grp->fd == 2)	1854	if (grp->int1 == 2)
1278	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1855	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1279		1856
1280	for (i = 1; i < items; ++i )	1857	for (i = 1; i < items; ++i )
1281	{	1858	{
		1859	aio_req req;
		1860
1282	if (GIMME_V != G_VOID)	1861	if (GIMME_V != G_VOID)
1283	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1862	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1284		1863
1285	aio_req req = SvAIO_REQ (ST (i));	1864	req = SvAIO_REQ (ST (i));
1286		1865
1287	if (req)	1866	if (req)
1288	{	1867	eio_grp_add (grp, req);
1289	++grp->length;
1290	req->grp = grp;
1291
1292	req->grp_prev = 0;
1293	req->grp_next = grp->grp_first;
1294
1295	if (grp->grp_first)
1296	grp->grp_first->grp_prev = req;
1297
1298	grp->grp_first = req;
1299	}
1300	}	1868	}
1301	}	1869	}
1302		1870
1303	void	1871	void
		1872	cancel_subs (aio_req_ornot req)
		1873	CODE:
		1874	req_cancel_subs (req);
		1875
		1876	void
1304	result (aio_req grp, ...)	1877	result (aio_req grp, ...)
		1878	CODE:
		1879	{
		1880	int i;
		1881	AV *av;
		1882
		1883	grp->errorno = errno;
		1884
		1885	av = newAV ();
		1886	av_extend (av, items - 1);
		1887
		1888	for (i = 1; i < items; ++i )
		1889	av_push (av, newSVsv (ST (i)));
		1890
		1891	SvREFCNT_dec (grp->sv1);
		1892	grp->sv1 = (SV *)av;
		1893	}
		1894
		1895	void
		1896	errno (aio_req grp, int errorno = errno)
		1897	CODE:
		1898	grp->errorno = errorno;
		1899
		1900	void
		1901	limit (aio_req grp, int limit)
1305	CODE:	1902	CODE:
1306	{	1903	eio_grp_limit (grp, limit);
1307	int i;
1308	AV *av = newAV ();
1309		1904
1310	for (i = 1; i < items; ++i )
1311	av_push (av, newSVsv (ST (i)));
1312
1313	SvREFCNT_dec (grp->data);
1314	grp->data = (SV *)av;
1315	}
1316
1317	void	1905	void
1318	feeder_limit (aio_req grp, int limit)	1906	feed (aio_req grp, SV *callback=&PL_sv_undef)
1319	CODE:	1907	CODE:
1320	grp->fd2 = limit;
1321	aio_grp_feed (grp);
1322
1323	void
1324	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
1325	CODE:
1326	{	1908	{
1327	SvREFCNT_dec (grp->fh2);	1909	SvREFCNT_dec (grp->sv2);
1328	grp->fh2 = newSVsv (callback);	1910	grp->sv2 = newSVsv (callback);
		1911	grp->feed = aio_grp_feed;
1329		1912
1330	if (grp->fd2 <= 0)	1913	if (grp->int2 <= 0)
1331	grp->fd2 = 2;	1914	grp->int2 = 2;
1332		1915
1333	aio_grp_feed (grp);	1916	eio_grp_limit (grp, grp->int2);
1334	}	1917	}
1335		1918

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