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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.52 by root, Sun Oct 22 22:14:54 2006 UTC vs.
Revision 1.207 by root, Fri Dec 30 07:40:54 2011 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
25	# if __linux
26	# include <sys/sendfile.h>
27	# elif __freebsd
28	# include <sys/socket.h>
29	# include <sys/uio.h>	21	# include <sys/mman.h>
30	# elif __hpux	22	#endif
		23
		24	/* perl namespace pollution */
		25	#undef VERSION
		26
		27	/* perl stupidly overrides readdir and maybe others */
		28	/* with thread-unsafe versions, imagine that :( */
		29	#undef readdir
		30	#undef opendir
		31	#undef closedir
		32
		33	#ifdef _WIN32
		34
		35	// perl overrides all those nice libc functions
		36
		37	#undef malloc
		38	#undef free
		39	#undef open
		40	#undef read
		41	#undef write
		42	#undef send
		43	#undef recv
		44	#undef stat
		45	#undef lstat
		46	#undef fstat
		47	#undef truncate
		48	#undef ftruncate
		49	#undef open
		50	#undef link
		51	#undef close
		52	#undef unlink
		53	#undef mkdir
		54	#undef rmdir
		55	#undef rename
		56	#undef lseek
		57	#undef opendir
		58	#undef readdir
		59	#undef closedir
		60	#undef chmod
		61	#undef fchmod
		62	#undef dup
		63	#undef dup2
		64	#undef abort
		65	#undef pipe
		66
		67	#else
		68
31	# include <sys/socket.h>	69	#include <sys/time.h>
32	# elif __solaris /* not yet */
33	# include <sys/sendfile.h>	70	#include <sys/select.h>
		71	#include <unistd.h>
		72	#include <utime.h>
		73	#include <signal.h>
		74
		75	#endif
		76
		77	#define EIO_STRUCT_STAT Stat_t
		78
		79	/* use NV for 32 bit perls as it allows larger offsets */
		80	#if IVSIZE >= 8
		81	# define VAL64 IV
		82	# define SvVAL64 SvIV
		83	# define newSVval64 newSViv
		84	#else
		85	# define VAL64 NV
		86	# define SvVAL64 SvNV
		87	# define newSVval64 newSVnv
		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	/* Linux/others */
		129	#ifndef O_ASYNC
		130	# define O_ASYNC 0
		131	#endif
		132	#ifndef O_DIRECT
		133	# define O_DIRECT 0
		134	#endif
		135	#ifndef O_NOATIME
		136	# define O_NOATIME 0
		137	#endif
		138
		139	/* POSIX */
		140	#ifndef O_CLOEXEC
		141	# define O_CLOEXEC 0
		142	#endif
		143	#ifndef O_NOFOLLOW
		144	# define O_NOFOLLOW 0
		145	#endif
		146	#ifndef O_NOCTTY
		147	# define O_NOCTTY 0
		148	#endif
		149	#ifndef O_NONBLOCK
		150	# define O_NONBLOCK 0
		151	#endif
		152	#ifndef O_EXEC
		153	# define O_EXEC 0
		154	#endif
		155	#ifndef O_SEARCH
		156	# define O_SEARCH 0
		157	#endif
		158	#ifndef O_DIRECTORY
		159	# define O_DIRECTORY 0
		160	#endif
		161	#ifndef O_DSYNC
		162	# define O_DSYNC 0
		163	#endif
		164	#ifndef O_RSYNC
		165	# define O_RSYNC 0
		166	#endif
		167	#ifndef O_SYNC
		168	# define O_SYNC 0
		169	#endif
		170	#ifndef O_TTY_INIT
		171	# define O_TTY_INIT 0
		172	#endif
		173
		174	#ifndef POSIX_FADV_NORMAL
		175	# define POSIX_FADV_NORMAL 0
		176	#endif
		177	#ifndef POSIX_FADV_SEQUENTIAL
		178	# define POSIX_FADV_SEQUENTIAL 0
		179	#endif
		180	#ifndef POSIX_FADV_RANDOM
		181	# define POSIX_FADV_RANDOM 0
		182	#endif
		183	#ifndef POSIX_FADV_NOREUSE
		184	# define POSIX_FADV_NOREUSE 0
		185	#endif
		186	#ifndef POSIX_FADV_WILLNEED
		187	# define POSIX_FADV_WILLNEED 0
		188	#endif
		189	#ifndef POSIX_FADV_DONTNEED
		190	# define POSIX_FADV_DONTNEED 0
		191	#endif
		192
		193	#if !HAVE_POSIX_FADVISE
		194	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		195	#endif
		196
		197	#ifndef POSIX_MADV_NORMAL
		198	# define POSIX_MADV_NORMAL 0
		199	#endif
		200	#ifndef POSIX_MADV_SEQUENTIAL
		201	# define POSIX_MADV_SEQUENTIAL 0
		202	#endif
		203	#ifndef POSIX_MADV_RANDOM
		204	# define POSIX_MADV_RANDOM 0
		205	#endif
		206	#ifndef POSIX_MADV_WILLNEED
		207	# define POSIX_MADV_WILLNEED 0
		208	#endif
		209	#ifndef POSIX_MADV_DONTNEED
		210	# define POSIX_MADV_DONTNEED 0
		211	#endif
		212
		213	#if !HAVE_POSIX_MADVISE
		214	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		215	#endif
		216
		217	#ifndef PROT_NONE
		218	# define PROT_NONE 0
		219	#endif
		220	#ifndef PROT_READ
		221	# define PROT_READ 0
		222	#endif
		223	#ifndef PROT_WRITE
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_EXEC
		227	# define PROT_EXEC 0
		228	#endif
		229
		230	#ifndef ST_RDONLY
		231	# define ST_RDONLY 0
		232	#endif
		233	#ifndef ST_NOSUID
		234	# define ST_NOSUID 0
		235	#endif
		236	#ifndef ST_NODEV
		237	# define ST_NODEV 0
		238	#endif
		239	#ifndef ST_NOEXEC
		240	# define ST_NOEXEC 0
		241	#endif
		242	#ifndef ST_SYNCHRONOUS
		243	# define ST_SYNCHRONOUS 0
		244	#endif
		245	#ifndef ST_MANDLOCK
		246	# define ST_MANDLOCK 0
		247	#endif
		248	#ifndef ST_WRITE
		249	# define ST_WRITE 0
		250	#endif
		251	#ifndef ST_APPEND
		252	# define ST_APPEND 0
		253	#endif
		254	#ifndef ST_IMMUTABLE
		255	# define ST_IMMUTABLE 0
		256	#endif
		257	#ifndef ST_NOATIME
		258	# define ST_NOATIME 0
		259	#endif
		260	#ifndef ST_NODIRATIME
		261	# define ST_NODIRATIME 0
		262	#endif
		263	#ifndef ST_RELATIME
		264	# define ST_RELATIME 0
		265	#endif
		266
		267	#ifndef S_IFIFO
		268	# define S_IFIFO 0
		269	#endif
		270	#ifndef S_IFCHR
		271	# define S_IFCHR 0
		272	#endif
		273	#ifndef S_IFBLK
		274	# define S_IFBLK 0
		275	#endif
		276	#ifndef S_IFLNK
		277	# define S_IFLNK 0
		278	#endif
		279	#ifndef S_IFREG
		280	# define S_IFREG 0
		281	#endif
		282	#ifndef S_IFDIR
		283	# define S_IFDIR 0
		284	#endif
		285	#ifndef S_IFWHT
		286	# define S_IFWHT 0
		287	#endif
		288	#ifndef S_IFSOCK
		289	# define S_IFSOCK 0
		290	#endif
		291
		292	#ifndef MAP_ANONYMOUS
		293	# ifdef MAP_ANON
		294	# define MAP_ANONYMOUS MAP_ANON
34	# else	295	# else
35	# error sendfile support requested but not available	296	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	297	# endif
37	#endif	298	#endif
38		299	#ifndef MAP_HUGETLB
39	/* used for struct dirent, AIX doesn't provide it */	300	# define MAP_HUGETLB 0
40	#ifndef NAME_MAX
41	# define NAME_MAX 4096
42	#endif	301	#endif
		302	#ifndef MAP_LOCKED
		303	# define MAP_LOCKED 0
		304	#endif
		305	#ifndef MAP_NORESERVE
		306	# define MAP_NORESERVE 0
		307	#endif
		308	#ifndef MAP_POPULATE
		309	# define MAP_POPULATE 0
		310	#endif
		311	#ifndef MAP_NONBLOCK
		312	# define MAP_NONBLOCK 0
		313	#endif
43		314
44	#if __ia64	315	#ifndef makedev
45	# define STACKSIZE 65536	316	# define makedev(maj,min) (((maj) << 8) | (min))
46	#else	317	#endif
47	# define STACKSIZE 8192	318	#ifndef major
		319	# define major(dev) ((dev) >> 8)
		320	#endif
		321	#ifndef minor
		322	# define minor(dev) ((dev) & 0xff)
		323	#endif
		324
		325	#ifndef PAGESIZE
		326	# define PAGESIZE sysconf (_SC_PAGESIZE)
48	#endif	327	#endif
49		328
50	enum {	329	enum {
51	REQ_QUIT,	330	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	};	331	};
63		332
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;	333	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	334	typedef eio_req *aio_req_ornot;
		335	typedef eio_wd aio_wd;
93		336
94	static int started, wanted;	337	static SV *on_next_submit;
95	static volatile int nreqs;	338	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	339	static int max_outstanding;
97	static int respipe [2];
98		340
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	341	static s_epipe respipe;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		342
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	343	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_invoke (aio_req req);	344	static void req_cancel (aio_req req);
107	static void req_free (aio_req req);	345
		346	static void
		347	want_poll (void)
		348	{
		349	/* write a dummy byte to the pipe so fh becomes ready */
		350	s_epipe_signal (&respipe);
		351	}
		352
		353	static void
		354	done_poll (void)
		355	{
		356	/* read any signals sent by the worker threads */
		357	s_epipe_drain (&respipe);
		358	}
108		359
109	/* must be called at most once */	360	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	361	static SV *
		362	req_sv (aio_req req, HV *stash)
111	{	363	{
112	if (!req->self)	364	if (!req->self)
113	{	365	{
114	req->self = (SV *)newHV ();	366	req->self = (SV *)newHV ();
115	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	367	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
116	}	368	}
117		369
118	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	370	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
119	}	371	}
120		372
121	static aio_req SvAIO_REQ (SV *sv)	373	static SV *
		374	newSVaio_wd (aio_wd wd)
122	{	375	{
123	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	376	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		377	}
		378
		379	static aio_req
		380	SvAIO_REQ (SV *sv)
		381	{
		382	MAGIC *mg;
		383
		384	if (!SvROK (sv)
		385	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		386	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		387	&& SvSTASH (SvRV (sv)) != aio_req_stash
		388	&& !sv_derived_from (sv, "IO::AIO::REQ")))
124	croak ("object of class " AIO_REQ_KLASS " expected");	389	croak ("object of class IO::AIO::REQ expected");
125		390
126	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	391	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
127		392
128	return mg ? (aio_req)mg->mg_ptr : 0;	393	return mg ? (aio_req)mg->mg_ptr : 0;
129	}	394	}
130		395
		396	static aio_wd
		397	SvAIO_WD (SV *sv)
		398	{
		399	if (!SvROK (sv)
		400	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		401	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		402	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		403
		404	return (aio_wd)(long)SvIVX (SvRV (sv));
		405	}
		406
		407	static void
131	static void aio_grp_feed (aio_req grp)	408	aio_grp_feed (aio_req grp)
132	{	409	{
133	while (grp->length < grp->fd2)	410	if (grp->sv2 && SvOK (grp->sv2))
134	{	411	{
135	int old_len = grp->length;	412	dSP;
136		413
137	if (grp->fh2 && SvOK (grp->fh2))	414	ENTER;
		415	SAVETMPS;
		416	PUSHMARK (SP);
		417	XPUSHs (req_sv (grp, aio_grp_stash));
		418	PUTBACK;
		419	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		420	SPAGAIN;
		421	FREETMPS;
		422	LEAVE;
		423	}
		424	}
		425
		426	static void
		427	req_submit (eio_req *req)
		428	{
		429	eio_submit (req);
		430
		431	if (expect_false (on_next_submit))
		432	{
		433	dSP;
		434	SV *cb = sv_2mortal (on_next_submit);
		435
		436	on_next_submit = 0;
		437
		438	PUSHMARK (SP);
		439	PUTBACK;
		440	call_sv (cb, G_DISCARD | G_EVAL);
		441	}
		442	}
		443
		444	static int
		445	req_invoke (eio_req *req)
		446	{
		447	if (req->flags & FLAG_SV2_RO_OFF)
		448	SvREADONLY_off (req->sv2);
		449
		450	if (!EIO_CANCELLED (req) && req->callback)
		451	{
		452	dSP;
		453	static SV *sv_result_cache; /* caches the result integer SV */
		454	SV *sv_result;
		455
		456	ENTER;
		457	SAVETMPS;
		458	PUSHMARK (SP);
		459	EXTEND (SP, 1);
		460
		461	/* do not recreate the result IV from scratch each time */
		462	if (expect_true (sv_result_cache))
138	{	463	{
139	dSP;	464	sv_result = sv_result_cache; sv_result_cache = 0;
140		465	SvIV_set (sv_result, req->result);
141	ENTER;	466	SvIOK_only (sv_result);
142	SAVETMPS;
143	PUSHMARK (SP);
144	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
145	PUTBACK;
146	call_sv (grp->fh2, G_VOID | G_EVAL);
147	SPAGAIN;
148	FREETMPS;
149	LEAVE;
150	}	467	}
151		468	else
152	/* stop if no progress has been made */
153	if (old_len == grp->length)
154	{	469	{
155	SvREFCNT_dec (grp->fh2);	470	sv_result = newSViv (req->result);
156	grp->fh2 = 0;	471	SvREADONLY_on (sv_result);
157	break;
158	}	472	}
		473
		474	switch (req->type)
		475	{
		476	case EIO_WD_OPEN:
		477	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		478	break;
		479
		480	case EIO_READDIR:
		481	{
		482	SV *rv = &PL_sv_undef;
		483
		484	if (req->result >= 0)
		485	{
		486	int i;
		487	char *names = (char *)req->ptr2;
		488	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		489	AV *av = newAV ();
		490
		491	av_extend (av, req->result - 1);
		492
		493	for (i = 0; i < req->result; ++i)
		494	{
		495	if (req->int1 & EIO_READDIR_DENTS)
		496	{
		497	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		498
		499	if (req->int1 & EIO_READDIR_CUSTOM2)
		500	{
		501	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		502	AV *avent = newAV ();
		503
		504	av_extend (avent, 2);
		505
		506	if (!sv_type [ent->type])
		507	{
		508	sv_type [ent->type] = newSViv (ent->type);
		509	SvREADONLY_on (sv_type [ent->type]);
		510	}
		511
		512	av_store (avent, 0, namesv);
		513	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		514	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		515
		516	av_store (av, i, newRV_noinc ((SV *)avent));
		517	}
		518	else
		519	av_store (av, i, namesv);
		520
		521	++ent;
		522	}
		523	else
		524	{
		525	SV *name = newSVpv (names, 0);
		526	av_store (av, i, name);
		527	names += SvCUR (name) + 1;
		528	}
		529	}
		530
		531	rv = sv_2mortal (newRV_noinc ((SV *)av));
		532	}
		533
		534	PUSHs (rv);
		535
		536	if (req->int1 & EIO_READDIR_CUSTOM1)
		537	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		538	}
		539	break;
		540
		541	case EIO_OPEN:
		542	{
		543	/* convert fd to fh */
		544	SV *fh = &PL_sv_undef;
		545
		546	if (req->result >= 0)
		547	{
		548	GV *gv = (GV *)sv_newmortal ();
		549	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		550	char sym [64];
		551	int symlen;
		552
		553	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		554	gv_init (gv, aio_stash, sym, symlen, 0);
		555
		556	symlen = snprintf (
		557	sym,
		558	sizeof (sym),
		559	"%s&=%d",
		560	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		561	(int)req->result
		562	);
		563
		564	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		565	fh = (SV *)gv;
		566	}
		567
		568	PUSHs (fh);
		569	}
		570	break;
		571
		572	case EIO_STATVFS:
		573	case EIO_FSTATVFS:
		574	{
		575	SV *rv = &PL_sv_undef;
		576
		577	#ifndef _WIN32
		578	if (req->result >= 0)
		579	{
		580	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		581	HV *hv = newHV ();
		582
		583	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		584
		585	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		586	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		587	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		588	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		589	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		590	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		591	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		592	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		593	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		594	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		595	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		596	}
		597	#endif
		598
		599	PUSHs (rv);
		600	}
		601
		602	break;
		603
		604	case EIO_GROUP:
		605	req->int1 = 2; /* mark group as finished */
		606
		607	if (req->sv1)
		608	{
		609	int i;
		610	AV *av = (AV *)req->sv1;
		611
		612	EXTEND (SP, AvFILL (av) + 1);
		613	for (i = 0; i <= AvFILL (av); ++i)
		614	PUSHs (*av_fetch (av, i, 0));
		615	}
		616	break;
		617
		618	case EIO_NOP:
		619	case EIO_BUSY:
		620	break;
		621
		622	case EIO_READLINK:
		623	case EIO_REALPATH:
		624	if (req->result > 0)
		625	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		626	break;
		627
		628	case EIO_STAT:
		629	case EIO_LSTAT:
		630	case EIO_FSTAT:
		631	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		632
		633	if (!(PL_laststatval = req->result))
		634	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		635	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		636
		637	PUSHs (sv_result);
		638	break;
		639
		640	case EIO_READ:
		641	{
		642	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		643	*SvEND (req->sv2) = 0;
		644	SvPOK_only (req->sv2);
		645	SvSETMAGIC (req->sv2);
		646	PUSHs (sv_result);
		647	}
		648	break;
		649
		650	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		651	if (req->result > 0)
		652	SvIV_set (sv_result, 0);
		653	/* FALLTHROUGH */
		654
		655	default:
		656	PUSHs (sv_result);
		657	break;
		658	}
		659
		660	errno = req->errorno;
		661
		662	PUTBACK;
		663	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		664	SPAGAIN;
		665
		666	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		667	SvREFCNT_dec (sv_result);
		668	else
		669	sv_result_cache = sv_result;
		670
		671	FREETMPS;
		672	LEAVE;
		673
		674	PUTBACK;
159	}	675	}
160	}
161		676
162	static void aio_grp_dec (aio_req grp)	677	return !!SvTRUE (ERRSV);
163	{
164	--grp->length;
165
166	/* call feeder, if applicable */
167	aio_grp_feed (grp);
168
169	/* finish, if done */
170	if (!grp->length && grp->fd)
171	{
172	req_invoke (grp);
173	req_free (grp);
174	}
175	}	678	}
176		679
177	static void poll_wait ()	680	static void
		681	req_destroy (aio_req req)
178	{	682	{
179	if (nreqs && !ress)
180	{
181	fd_set rfd;
182	FD_ZERO(&rfd);
183	FD_SET(respipe [0], &rfd);
184
185	select (respipe [0] + 1, &rfd, 0, 0, 0);
186	}
187	}
188
189	static void req_invoke (aio_req req)
190	{
191	dSP;
192	int errorno = errno;
193
194	if (req->cancelled || !SvOK (req->callback))
195	return;
196
197	errno = req->errorno;
198
199	ENTER;
200	SAVETMPS;
201	PUSHMARK (SP);
202	EXTEND (SP, 1);
203
204	switch (req->type)
205	{
206	case REQ_READDIR:
207	{
208	SV *rv = &PL_sv_undef;
209
210	if (req->result >= 0)
211	{
212	char *buf = req->data2ptr;
213	AV *av = newAV ();
214
215	while (req->result)
216	{
217	SV *sv = newSVpv (buf, 0);
218
219	av_push (av, sv);
220	buf += SvCUR (sv) + 1;
221	req->result--;
222	}
223
224	rv = sv_2mortal (newRV_noinc ((SV *)av));
225	}
226
227	PUSHs (rv);
228	}
229	break;
230
231	case REQ_OPEN:
232	{
233	/* convert fd to fh */
234	SV *fh;
235
236	PUSHs (sv_2mortal (newSViv (req->result)));
237	PUTBACK;
238	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
239	SPAGAIN;
240
241	fh = SvREFCNT_inc (POPs);
242
243	PUSHMARK (SP);
244	XPUSHs (sv_2mortal (fh));
245	}
246	break;
247
248	case REQ_GROUP:
249	req->fd = 2; /* mark group as finished */
250
251	if (req->data)
252	{
253	int i;
254	AV *av = (AV *)req->data;
255
256	EXTEND (SP, AvFILL (av) + 1);
257	for (i = 0; i <= AvFILL (av); ++i)
258	PUSHs (*av_fetch (av, i, 0));
259	}
260	break;
261
262	case REQ_SLEEP:
263	break;
264
265	default:
266	PUSHs (sv_2mortal (newSViv (req->result)));
267	break;
268	}
269
270
271	PUTBACK;
272	call_sv (req->callback, G_VOID | G_EVAL);
273	SPAGAIN;
274
275	FREETMPS;
276	LEAVE;
277
278	errno = errorno;
279
280	if (SvTRUE (ERRSV))
281	{
282	req_free (req);
283	croak (0);
284	}
285	}
286
287	static void req_free (aio_req req)
288	{
289	if (req->grp)
290	{
291	aio_req grp = req->grp;
292
293	/* unlink request */
294	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
295	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
296
297	if (grp->grp_first == req)
298	grp->grp_first = req->grp_next;
299
300	aio_grp_dec (grp);
301	}
302
303	if (req->self)	683	if (req->self)
304	{	684	{
305	sv_unmagic (req->self, PERL_MAGIC_ext);	685	sv_unmagic (req->self, PERL_MAGIC_ext);
306	SvREFCNT_dec (req->self);	686	SvREFCNT_dec (req->self);
307	}	687	}
308		688
309	SvREFCNT_dec (req->data);
310	SvREFCNT_dec (req->fh);	689	SvREFCNT_dec (req->sv1);
311	SvREFCNT_dec (req->fh2);	690	SvREFCNT_dec (req->sv2);
		691	SvREFCNT_dec (req->sv3);
		692	SvREFCNT_dec (req->sv4);
312	SvREFCNT_dec (req->callback);	693	SvREFCNT_dec (req->callback);
313	Safefree (req->statdata);
314		694
315	if (req->type == REQ_READDIR && req->result >= 0)
316	free (req->data2ptr);
317
318	Safefree (req);	695	free (req);
319	}	696	}
320		697
321	static void req_cancel (aio_req req)	698	static void
		699	req_cancel_subs (aio_req grp)
322	{	700	{
323	req->cancelled = 1;
324
325	if (req->type == REQ_GROUP)	701	if (grp->type != EIO_GROUP)
		702	return;
		703
		704	SvREFCNT_dec (grp->sv2);
		705	grp->sv2 = 0;
		706
		707	eio_grp_cancel (grp);
		708	}
		709
		710	static void ecb_cold
		711	create_respipe (void)
		712	{
		713	if (s_epipe_renew (&respipe))
		714	croak ("IO::AIO: unable to initialize result pipe");
		715	}
		716
		717	static void
		718	poll_wait (void)
		719	{
		720	while (eio_nreqs ())
326	{	721	{
327	aio_req sub;	722	int size;
328		723
329	for (sub = req->grp_first; sub; sub = sub->grp_next)	724	X_LOCK (reslock);
330	req_cancel (sub);	725	size = res_queue.size;
		726	X_UNLOCK (reslock);
		727
		728	if (size)
		729	return;
		730
		731	etp_maybe_start_thread ();
		732
		733	s_epipe_wait (&respipe);
331	}	734	}
332	}	735	}
333		736
334	static int poll_cb ()	737	static int
		738	poll_cb (void)
335	{	739	{
336	dSP;
337	int count = 0;
338	int do_croak = 0;
339	aio_req req;
340
341	for (;;)	740	for (;;)
342	{	741	{
343	pthread_mutex_lock (&reslock);	742	int res = eio_poll ();
344	req = ress;
345		743
346	if (req)	744	if (res > 0)
		745	croak (0);
		746
		747	if (!max_outstanding || max_outstanding > eio_nreqs ())
		748	return res;
		749
		750	poll_wait ();
		751	}
		752	}
		753
		754	static void ecb_cold
		755	reinit (void)
		756	{
		757	create_respipe ();
		758
		759	if (eio_init (want_poll, done_poll) < 0)
		760	croak ("IO::AIO: unable to initialise eio library");
		761	}
		762
		763	/*****************************************************************************/
		764
		765	#if !_POSIX_MAPPED_FILES
		766	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		767	# define munmap(addr,length) (errno = ENOSYS, -1)
		768	#endif
		769
		770	#if !_POSIX_MEMORY_PROTECTION
		771	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		772	# define PROT_NONE 0
		773	# define PROT_WRITE 0
		774	# define MAP_PRIVATE 0
		775	# define MAP_SHARED 0
		776	# define MAP_FIXED 0
		777	#endif
		778
		779	#define MMAP_MAGIC PERL_MAGIC_ext
		780
		781	static int ecb_cold
		782	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		783	{
		784	int old_errno = errno;
		785	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		786	errno = old_errno;
		787
		788	mg->mg_obj = 0; /* just in case */
		789
		790	SvREADONLY_off (sv);
		791
		792	if (SvPVX (sv) != mg->mg_ptr)
		793	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		794
		795	SvCUR_set (sv, 0);
		796	SvPVX (sv) = 0;
		797	SvOK_off (sv);
		798
		799	return 0;
		800	}
		801
		802	static MGVTBL mmap_vtbl = {
		803	0, 0, 0, 0, mmap_free
		804	};
		805
		806	/*****************************************************************************/
		807
		808	static SV *
		809	get_cb (SV *cb_sv)
		810	{
		811	SvGETMAGIC (cb_sv);
		812	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		813	}
		814
		815	static aio_req ecb_noinline
		816	dreq (SV *callback)
		817	{
		818	SV *cb_cv;
		819	aio_req req;
		820	int req_pri = next_pri;
		821	next_pri = EIO_PRI_DEFAULT;
		822
		823	cb_cv = get_cb (callback);
		824
		825	req = calloc (sizeof (*req), 1);
		826	if (!req)
		827	croak ("out of memory during eio_req allocation");
		828
		829	req->callback = SvREFCNT_inc (cb_cv);
		830	req->pri = req_pri;
		831
		832	return req;
		833	}
		834
		835	#define dREQ \
		836	aio_req req = dreq (callback); \
		837
		838	#define REQ_SEND \
		839	PUTBACK; \
		840	req_submit (req); \
		841	SPAGAIN; \
		842	\
		843	if (GIMME_V != G_VOID) \
		844	XPUSHs (req_sv (req, aio_req_stash));
		845
		846	ecb_inline void
		847	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		848	{
		849	if (expect_false (SvROK (path)))
		850	{
		851	SV *rv = SvRV (path);
		852	SV *wdob;
		853
		854	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
347	{	855	{
348	ress = req->next;	856	path = AvARRAY (rv)[1];
		857	wdob = AvARRAY (rv)[0];
349		858
350	if (!ress)	859	if (SvOK (wdob))
351	{	860	{
352	/* read any signals sent by the worker threads */	861	*wd = SvAIO_WD (wdob);
353	char buf [32];	862	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
354	while (read (respipe [0], buf, 32) == 32)
355	;
356
357	rese = 0;
358	}	863	}
		864	else
		865	*wd = EIO_INVALID_WD;
359	}	866	}
360		867	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
361	pthread_mutex_unlock (&reslock);
362
363	if (!req)
364	break;
365
366	--nreqs;
367
368	if (req->type == REQ_QUIT)
369	started--;
370	else if (req->type == REQ_GROUP && req->length)
371	{	868	{
372	req->fd = 1; /* mark request as delayed */	869	*wd = (aio_wd)(long)SvIVX (rv);
373	continue;	870	*wdsv = SvREFCNT_inc_NN (rv);
		871	*ptr = ".";
		872	return; /* path set to "." */
374	}	873	}
375	else	874	else
376	{	875	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
377	if (req->type == REQ_READ)
378	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
379
380	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
381	SvREADONLY_off (req->data);
382
383	if (req->statdata)
384	{
385	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
386	PL_laststatval = req->result;
387	PL_statcache = *(req->statdata);
388	}
389
390	req_invoke (req);
391
392	count++;
393	}
394
395	req_free (req);
396	}	876	}
397		877
398	return count;	878	*pathsv = newSVsv (path);
		879	*ptr = SvPVbyte_nolen (*pathsv);
399	}	880	}
400		881
401	static void *aio_proc(void *arg);	882	static void ecb_noinline
402		883	req_set_path1 (aio_req req, SV *path)
403	static void start_thread (void)
404	{	884	{
405	sigset_t fullsigset, oldsigset;	885	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
406	pthread_t tid;
407	pthread_attr_t attr;
408
409	pthread_attr_init (&attr);
410	pthread_attr_setstacksize (&attr, STACKSIZE);
411	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
412
413	sigfillset (&fullsigset);
414	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
415
416	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
417	started++;
418
419	sigprocmask (SIG_SETMASK, &oldsigset, 0);
420	}	886	}
421		887
422	static void req_send (aio_req req)	888	static void ecb_noinline
		889	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
423	{	890	{
424	while (started < wanted && nreqs >= started)	891	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
425	start_thread ();
426		892
427	++nreqs;	893	switch (SvTYPE (rv))
428
429	pthread_mutex_lock (&reqlock);
430
431	req->next = 0;
432
433	if (reqe)
434	{	894	{
435	reqe->next = req;	895	case SVt_PVIO:
436	reqe = req;	896	case SVt_PVLV:
		897	case SVt_PVGV:
		898	req->type = type_fh;
		899	req->sv1 = newSVsv (fh_or_path);
		900	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		901	break;
		902
		903	default:
		904	req->type = type_path;
		905	req_set_path1 (req, fh_or_path);
		906	break;
437	}	907	}
438	else
439	reqe = reqs = req;
440
441	pthread_cond_signal (&reqwait);
442	pthread_mutex_unlock (&reqlock);
443
444	if (nreqs > max_outstanding)
445	for (;;)
446	{
447	poll_cb ();
448
449	if (nreqs <= max_outstanding)
450	break;
451
452	poll_wait ();
453	}
454	}	908	}
455		909
456	static void end_thread (void)	910	XS(boot_IO__AIO) ecb_cold;
457	{
458	aio_req req;
459	Newz (0, req, 1, aio_cb);
460	req->type = REQ_QUIT;
461		911
462	req_send (req);	912	MODULE = IO::AIO PACKAGE = IO::AIO
463	}
464		913
465	static void min_parallel (int nthreads)	914	PROTOTYPES: ENABLE
466	{
467	if (wanted < nthreads)
468	wanted = nthreads;
469	}
470		915
471	static void max_parallel (int nthreads)	916	BOOT:
472	{	917	{
473	int cur = started;	918	static const struct {
		919	const char *name;
		920	IV iv;
		921	} *civ, const_iv[] = {
		922	# define const_niv(name, value) { # name, (IV) value },
		923	# define const_iv(name) { # name, (IV) name },
		924	# define const_eio(name) { # name, (IV) EIO_ ## name },
		925	const_iv (EXDEV)
		926	const_iv (ENOSYS)
		927	const_iv (O_RDONLY)
		928	const_iv (O_WRONLY)
		929	const_iv (O_RDWR)
		930	const_iv (O_CREAT)
		931	const_iv (O_TRUNC)
		932	const_iv (O_EXCL)
		933	const_iv (O_APPEND)
474		934
475	if (wanted > nthreads)	935	const_iv (O_ASYNC)
476	wanted = nthreads;	936	const_iv (O_DIRECT)
		937	const_iv (O_NOATIME)
477		938
478	while (cur > wanted)	939	const_iv (O_CLOEXEC)
479	{	940	const_iv (O_NOCTTY)
480	end_thread ();	941	const_iv (O_NOFOLLOW)
481	cur--;	942	const_iv (O_NONBLOCK)
482	}	943	const_iv (O_EXEC)
		944	const_iv (O_SEARCH)
		945	const_iv (O_DIRECTORY)
		946	const_iv (O_DSYNC)
		947	const_iv (O_RSYNC)
		948	const_iv (O_SYNC)
		949	const_iv (O_TTY_INIT)
483		950
484	while (started > wanted)	951	const_iv (S_IFIFO)
485	{	952	const_iv (S_IFCHR)
486	poll_wait ();	953	const_iv (S_IFBLK)
487	poll_cb ();	954	const_iv (S_IFLNK)
488	}	955	const_iv (S_IFREG)
489	}	956	const_iv (S_IFDIR)
		957	const_iv (S_IFWHT)
		958	const_iv (S_IFSOCK)
		959	const_iv (S_IFMT)
490		960
491	static void create_pipe ()	961	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
492	{	962	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
493	if (pipe (respipe))	963	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
494	croak ("unable to initialize result pipe");	964	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		965	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		966	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
495		967
496	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	968	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
497	croak ("cannot set result pipe to nonblocking mode");	969	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		970	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		971	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		972	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
498		973
499	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	974	const_iv (ST_RDONLY)
500	croak ("cannot set result pipe to nonblocking mode");	975	const_iv (ST_NOSUID)
501	}	976	const_iv (ST_NODEV)
		977	const_iv (ST_NOEXEC)
		978	const_iv (ST_SYNCHRONOUS)
		979	const_iv (ST_MANDLOCK)
		980	const_iv (ST_WRITE)
		981	const_iv (ST_APPEND)
		982	const_iv (ST_IMMUTABLE)
		983	const_iv (ST_NOATIME)
		984	const_iv (ST_NODIRATIME)
		985	const_iv (ST_RELATIME)
502		986
503	/*****************************************************************************/	987	const_iv (PROT_NONE)
504	/* work around various missing functions */	988	const_iv (PROT_EXEC)
		989	const_iv (PROT_READ)
		990	const_iv (PROT_WRITE)
505		991
506	#if !HAVE_PREADWRITE	992	/*const_iv (MAP_FIXED)*/
507	# define pread aio_pread	993	const_iv (MAP_PRIVATE)
508	# define pwrite aio_pwrite	994	const_iv (MAP_SHARED)
		995	const_iv (MAP_ANONYMOUS)
509		996
510	/*	997	/* linuxish */
511	* make our pread/pwrite safe against themselves, but not against	998	const_iv (MAP_HUGETLB)
512	* normal read/write by using a mutex. slows down execution a lot,	999	const_iv (MAP_LOCKED)
513	* but that's your problem, not mine.	1000	const_iv (MAP_NORESERVE)
514	*/	1001	const_iv (MAP_POPULATE)
515	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	1002	const_iv (MAP_NONBLOCK)
516		1003
517	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	1004	const_eio (MCL_FUTURE)
518	{	1005	const_eio (MCL_CURRENT)
519	ssize_t res;
520	off_t ooffset;
521		1006
522	pthread_mutex_lock (&preadwritelock);	1007	const_eio (MS_ASYNC)
523	ooffset = lseek (fd, 0, SEEK_CUR);	1008	const_eio (MS_INVALIDATE)
524	lseek (fd, offset, SEEK_SET);	1009	const_eio (MS_SYNC)
525	res = read (fd, buf, count);
526	lseek (fd, ooffset, SEEK_SET);
527	pthread_mutex_unlock (&preadwritelock);
528		1010
529	return res;	1011	const_eio (MT_MODIFY)
530	}
531		1012
532	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1013	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
533	{	1014	const_eio (SYNC_FILE_RANGE_WRITE)
534	ssize_t res;	1015	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
535	off_t ooffset;
536		1016
537	pthread_mutex_lock (&preadwritelock);	1017	const_eio (FALLOC_FL_KEEP_SIZE)
538	ooffset = lseek (fd, 0, SEEK_CUR);
539	lseek (fd, offset, SEEK_SET);
540	res = write (fd, buf, count);
541	lseek (fd, offset, SEEK_SET);
542	pthread_mutex_unlock (&preadwritelock);
543		1018
544	return res;	1019	const_eio (READDIR_DENTS)
545	}	1020	const_eio (READDIR_DIRS_FIRST)
546	#endif	1021	const_eio (READDIR_STAT_ORDER)
		1022	const_eio (READDIR_FOUND_UNKNOWN)
547		1023
548	#if !HAVE_FDATASYNC	1024	const_eio (DT_UNKNOWN)
549	# define fdatasync fsync	1025	const_eio (DT_FIFO)
550	#endif	1026	const_eio (DT_CHR)
551		1027	const_eio (DT_DIR)
552	#if !HAVE_READAHEAD	1028	const_eio (DT_BLK)
553	# define readahead aio_readahead	1029	const_eio (DT_REG)
554		1030	const_eio (DT_LNK)
555	static ssize_t readahead (int fd, off_t offset, size_t count)	1031	const_eio (DT_SOCK)
556	{	1032	const_eio (DT_WHT)
557	char readahead_buf[4096];
558
559	while (count > 0)
560	{
561	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
562
563	pread (fd, readahead_buf, len, offset);
564	offset += len;
565	count -= len;
566	}
567
568	errno = 0;
569	}
570	#endif
571
572	#if !HAVE_READDIR_R
573	# define readdir_r aio_readdir_r
574
575	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
576
577	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
578	{
579	struct dirent *e;
580	int errorno;
581
582	pthread_mutex_lock (&readdirlock);
583
584	e = readdir (dirp);
585	errorno = errno;
586
587	if (e)
588	{
589	*res = ent;
590	strcpy (ent->d_name, e->d_name);
591	}
592	else
593	*res = 0;
594
595	pthread_mutex_unlock (&readdirlock);
596
597	errno = errorno;
598	return e ? 0 : -1;
599	}
600	#endif
601
602	/* sendfile always needs emulation */
603	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
604	{
605	ssize_t res;
606
607	if (!count)
608	return 0;
609
610	#if HAVE_SENDFILE
611	# if __linux
612	res = sendfile (ofd, ifd, &offset, count);
613
614	# elif __freebsd
615	/*
616	* Of course, the freebsd sendfile is a dire hack with no thoughts
617	* wasted on making it similar to other I/O functions.
618	*/
619	{
620	off_t sbytes;
621	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
622
623	if (res < 0 && sbytes)
624	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
625	res = sbytes;
626	}	1033	};
627		1034
628	# elif __hpux	1035	aio_stash = gv_stashpv ("IO::AIO" , 1);
629	res = sendfile (ofd, ifd, offset, count, 0, 0);	1036	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1037	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1038	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
630		1039
631	# elif __solaris	1040	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
632	{	1041	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
633	struct sendfilevec vec;
634	size_t sbytes;
635		1042
636	vec.sfv_fd = ifd;	1043	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
637	vec.sfv_flag = 0;
638	vec.sfv_off = offset;
639	vec.sfv_len = count;
640		1044
641	res = sendfilev (ofd, &vec, 1, &sbytes);	1045	reinit ();
		1046	}
642		1047
643	if (res < 0 && sbytes)	1048	void
		1049	reinit ()
		1050	PROTOTYPE:
		1051
		1052	void
		1053	max_poll_reqs (unsigned int nreqs)
		1054	PROTOTYPE: $
		1055	CODE:
		1056	eio_set_max_poll_reqs (nreqs);
		1057
		1058	void
		1059	max_poll_time (double nseconds)
		1060	PROTOTYPE: $
		1061	CODE:
		1062	eio_set_max_poll_time (nseconds);
		1063
		1064	void
		1065	min_parallel (unsigned int nthreads)
		1066	PROTOTYPE: $
		1067	CODE:
		1068	eio_set_min_parallel (nthreads);
		1069
		1070	void
		1071	max_parallel (unsigned int nthreads)
		1072	PROTOTYPE: $
		1073	CODE:
		1074	eio_set_max_parallel (nthreads);
		1075
		1076	void
		1077	max_idle (unsigned int nthreads)
		1078	PROTOTYPE: $
		1079	CODE:
		1080	eio_set_max_idle (nthreads);
		1081
		1082	void
		1083	idle_timeout (unsigned int seconds)
		1084	PROTOTYPE: $
		1085	CODE:
		1086	eio_set_idle_timeout (seconds);
		1087
		1088	void
		1089	max_outstanding (unsigned int maxreqs)
		1090	PROTOTYPE: $
		1091	CODE:
		1092	max_outstanding = maxreqs;
		1093
		1094	void
		1095	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1096	PPCODE:
		1097	{
		1098	dREQ;
		1099
		1100	req->type = EIO_WD_OPEN;
		1101	req_set_path1 (req, pathname);
		1102
		1103	REQ_SEND;
		1104	}
		1105
		1106	void
		1107	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1108	PPCODE:
		1109	{
		1110	dREQ;
		1111
		1112	req->type = EIO_OPEN;
		1113	req_set_path1 (req, pathname);
		1114	req->int1 = flags;
		1115	req->int2 = mode;
		1116
		1117	REQ_SEND;
		1118	}
		1119
		1120	void
		1121	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1122	ALIAS:
		1123	aio_fsync = EIO_FSYNC
		1124	aio_fdatasync = EIO_FDATASYNC
		1125	aio_syncfs = EIO_SYNCFS
		1126	PPCODE:
		1127	{
		1128	int fd = s_fileno_croak (fh, 0);
		1129	dREQ;
		1130
		1131	req->type = ix;
		1132	req->sv1 = newSVsv (fh);
		1133	req->int1 = fd;
		1134
		1135	REQ_SEND (req);
		1136	}
		1137
		1138	void
		1139	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1140	PPCODE:
		1141	{
		1142	int fd = s_fileno_croak (fh, 0);
		1143	dREQ;
		1144
		1145	req->type = EIO_SYNC_FILE_RANGE;
		1146	req->sv1 = newSVsv (fh);
		1147	req->int1 = fd;
		1148	req->offs = offset;
644	res = sbytes;	1149	req->size = nbytes;
645	}	1150	req->int2 = flags;
646		1151
647	# endif	1152	REQ_SEND (req);
		1153	}
		1154
		1155	void
		1156	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1157	PPCODE:
		1158	{
		1159	int fd = s_fileno_croak (fh, 0);
		1160	dREQ;
		1161
		1162	req->type = EIO_FALLOCATE;
		1163	req->sv1 = newSVsv (fh);
		1164	req->int1 = fd;
		1165	req->int2 = mode;
		1166	req->offs = offset;
		1167	req->size = len;
		1168
		1169	REQ_SEND (req);
		1170	}
		1171
		1172	void
		1173	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1174	PPCODE:
		1175	{
		1176	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1177	int fd = s_fileno_croak (fh, 0);
		1178	dREQ;
		1179
		1180	if (expect_false (close_fd < 0))
		1181	{
		1182	int pipefd [2];
		1183
		1184	if (
		1185	#ifdef _WIN32
		1186	_pipe (pipefd, 1, _O_BINARY) < 0
648	#else	1187	#else
649	res = -1;	1188	pipe (pipefd) < 0
650	errno = ENOSYS;	1189	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
651	#endif	1190	#endif
652		1191	|| close (pipefd [1]) < 0
653	if (res < 0
654	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
655	#if __solaris
656	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
657	#endif
658	)
659	)
660	{
661	/* emulate sendfile. this is a major pain in the ass */
662	char buf[4096];
663	res = 0;
664
665	while (count)
666	{
667	ssize_t cnt;
668
669	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
670
671	if (cnt <= 0)
672	{	1192	)
673	if (cnt && !res) res = -1;	1193	abort (); /*D*/
674	break;
675	}
676		1194
677	cnt = write (ofd, buf, cnt);	1195	close_fd = pipefd [0];
678
679	if (cnt <= 0)
680	{
681	if (cnt && !res) res = -1;
682	break;
683	}
684
685	offset += cnt;
686	res += cnt;
687	count -= cnt;
688	}
689	}
690
691	return res;
692	}
693
694	/* read a full directory */
695	static int scandir_ (const char *path, void **namesp)
696	{
697	DIR *dirp = opendir (path);
698	union
699	{
700	struct dirent d;
701	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
702	} u;
703	struct dirent *entp;
704	char *name, *names;
705	int memlen = 4096;
706	int memofs = 0;
707	int res = 0;
708	int errorno;
709
710	if (!dirp)
711	return -1;
712
713	names = malloc (memlen);
714
715	for (;;)
716	{
717	errno = 0, readdir_r (dirp, &u.d, &entp);
718
719	if (!entp)
720	break;
721
722	name = entp->d_name;
723
724	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
725	{
726	int len = strlen (name) + 1;
727
728	res++;
729
730	while (memofs + len > memlen)
731	{
732	memlen *= 2;
733	names = realloc (names, memlen);
734	if (!names)
735	break;
736	}
737
738	memcpy (names + memofs, name, len);
739	memofs += len;
740	}
741	}
742
743	errorno = errno;
744	closedir (dirp);
745
746	if (errorno)
747	{
748	free (names);
749	errno = errorno;
750	res = -1;
751	}
752
753	*namesp = (void *)names;
754	return res;
755	}
756
757	/*****************************************************************************/
758
759	static void *aio_proc (void *thr_arg)
760	{
761	aio_req req;
762	int type;
763
764	do
765	{
766	pthread_mutex_lock (&reqlock);
767
768	for (;;)
769	{
770	req = reqs;
771
772	if (reqs)
773	{
774	reqs = reqs->next;
775	if (!reqs) reqe = 0;
776	}
777
778	if (req)
779	break;
780
781	pthread_cond_wait (&reqwait, &reqlock);
782	}
783
784	pthread_mutex_unlock (&reqlock);
785
786	errno = 0; /* strictly unnecessary */
787
788	if (!req->cancelled)
789	switch (type = req->type) /* remember type for QUIT check */
790	{
791	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
792	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
793
794	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
795	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
796
797	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
798	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
799	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
800
801	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
802	case REQ_CLOSE: req->result = close (req->fd); break;
803	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
804	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
805	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
806	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
807	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
808
809	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
810	case REQ_FSYNC: req->result = fsync (req->fd); break;
811	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
812
813	case REQ_SLEEP:
814	{
815	struct timeval tv;
816
817	tv.tv_sec = req->fd;
818	tv.tv_usec = req->fd2;
819
820	req->result = select (0, 0, 0, 0, &tv);
821	}
822
823	case REQ_QUIT:
824	break;
825
826	default:
827	req->result = ENOSYS;
828	break;
829	}	1196	}
830		1197
831	req->errorno = errno;
832
833	pthread_mutex_lock (&reslock);
834
835	req->next = 0;
836
837	if (rese)
838	{
839	rese->next = req;
840	rese = req;
841	}
842	else
843	{
844	rese = ress = req;
845
846	/* write a dummy byte to the pipe so fh becomes ready */
847	write (respipe [1], &respipe, 1);
848	}
849
850	pthread_mutex_unlock (&reslock);
851	}
852	while (type != REQ_QUIT);
853
854	return 0;
855	}
856
857	/*****************************************************************************/
858
859	static void atfork_prepare (void)
860	{
861	pthread_mutex_lock (&reqlock);
862	pthread_mutex_lock (&reslock);
863	#if !HAVE_PREADWRITE
864	pthread_mutex_lock (&preadwritelock);
865	#endif
866	#if !HAVE_READDIR_R
867	pthread_mutex_lock (&readdirlock);
868	#endif
869	}
870
871	static void atfork_parent (void)
872	{
873	#if !HAVE_READDIR_R
874	pthread_mutex_unlock (&readdirlock);
875	#endif
876	#if !HAVE_PREADWRITE
877	pthread_mutex_unlock (&preadwritelock);
878	#endif
879	pthread_mutex_unlock (&reslock);
880	pthread_mutex_unlock (&reqlock);
881	}
882
883	static void atfork_child (void)
884	{
885	aio_req prv;
886
887	started = 0;
888
889	while (reqs)
890	{
891	prv = reqs;
892	reqs = prv->next;
893	req_free (prv);
894	}
895
896	reqs = reqe = 0;
897
898	while (ress)
899	{
900	prv = ress;
901	ress = prv->next;
902	req_free (prv);
903	}
904
905	ress = rese = 0;
906
907	close (respipe [0]);
908	close (respipe [1]);
909	create_pipe ();
910
911	atfork_parent ();
912	}
913
914	#define dREQ \
915	aio_req req; \
916	\
917	if (SvOK (callback) && !SvROK (callback)) \
918	croak ("callback must be undef or of reference type"); \
919	\
920	Newz (0, req, 1, aio_cb); \
921	if (!req) \
922	croak ("out of memory during aio_req allocation"); \
923	\
924	req->callback = newSVsv (callback)
925
926	#define REQ_SEND \
927	req_send (req); \
928	\
929	if (GIMME_V != G_VOID) \
930	XPUSHs (req_sv (req, AIO_REQ_KLASS));
931
932	MODULE = IO::AIO PACKAGE = IO::AIO
933
934	PROTOTYPES: ENABLE
935
936	BOOT:
937	{
938	HV *stash = gv_stashpv ("IO::AIO", 1);
939	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
940	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
941	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
942
943	create_pipe ();
944	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
945	}
946
947	void
948	min_parallel (nthreads)
949	int nthreads
950	PROTOTYPE: $
951
952	void
953	max_parallel (nthreads)
954	int nthreads
955	PROTOTYPE: $
956
957	int
958	max_outstanding (nreqs)
959	int nreqs
960	PROTOTYPE: $
961	CODE:
962	RETVAL = max_outstanding;
963	max_outstanding = nreqs;
964
965	void
966	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
967	SV * pathname
968	int flags
969	int mode
970	SV * callback
971	PROTOTYPE: $$$;$
972	PPCODE:
973	{
974	dREQ;
975
976	req->type = REQ_OPEN;	1198	req->type = EIO_DUP2;
		1199	req->int1 = close_fd;
977	req->data = newSVsv (pathname);	1200	req->sv2 = newSVsv (fh);
978	req->dataptr = SvPVbyte_nolen (req->data);	1201	req->int2 = fd;
979	req->fd = flags;
980	req->mode = mode;
981		1202
982	REQ_SEND;	1203	REQ_SEND (req);
983	}	1204	}
984		1205
985	void	1206	void
986	aio_close (fh,callback=&PL_sv_undef)	1207	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
987	SV * fh
988	SV * callback
989	PROTOTYPE: $;$
990	ALIAS:	1208	ALIAS:
991	aio_close = REQ_CLOSE
992	aio_fsync = REQ_FSYNC
993	aio_fdatasync = REQ_FDATASYNC
994	PPCODE:
995	{
996	dREQ;
997
998	req->type = ix;
999	req->fh = newSVsv (fh);
1000	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1001
1002	REQ_SEND (req);
1003	}
1004
1005	void
1006	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1007	SV * fh
1008	UV offset
1009	UV length
1010	SV * data
1011	UV dataoffset
1012	SV * callback
1013	ALIAS:
1014	aio_read = REQ_READ	1209	aio_read = EIO_READ
1015	aio_write = REQ_WRITE	1210	aio_write = EIO_WRITE
1016	PROTOTYPE: $$$$$;$
1017	PPCODE:	1211	PPCODE:
1018	{	1212	{
1019	aio_req req;
1020	STRLEN svlen;	1213	STRLEN svlen;
		1214	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1021	char *svptr = SvPVbyte (data, svlen);	1215	char *svptr = SvPVbyte (data, svlen);
1022		1216	UV len = SvUV (length);
1023	SvUPGRADE (data, SVt_PV);
1024	SvPOK_on (data);
1025		1217
1026	if (dataoffset < 0)	1218	if (dataoffset < 0)
1027	dataoffset += svlen;	1219	dataoffset += svlen;
1028		1220
1029	if (dataoffset < 0 || dataoffset > svlen)	1221	if (dataoffset < 0 || dataoffset > svlen)
1030	croak ("data offset outside of string");	1222	croak ("dataoffset outside of data scalar");
1031		1223
1032	if (ix == REQ_WRITE)	1224	if (ix == EIO_WRITE)
1033	{	1225	{
1034	/* write: check length and adjust. */	1226	/* write: check length and adjust. */
1035	if (length < 0 || length + dataoffset > svlen)	1227	if (!SvOK (length) || len + dataoffset > svlen)
1036	length = svlen - dataoffset;	1228	len = svlen - dataoffset;
1037	}	1229	}
1038	else	1230	else
1039	{	1231	{
1040	/* read: grow scalar as necessary */	1232	/* read: check type and grow scalar as necessary */
		1233	SvUPGRADE (data, SVt_PV);
1041	svptr = SvGROW (data, length + dataoffset);	1234	svptr = SvGROW (data, len + dataoffset + 1);
1042	}	1235	}
1043
1044	if (length < 0)
1045	croak ("length must not be negative");
1046		1236
1047	{	1237	{
1048	dREQ;	1238	dREQ;
1049		1239
1050	req->type = ix;	1240	req->type = ix;
1051	req->fh = newSVsv (fh);	1241	req->sv1 = newSVsv (fh);
1052	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1242	req->int1 = fd;
1053	: IoOFP (sv_2io (fh)));	1243	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1054	req->offset = offset;	1244	req->size = len;
1055	req->length = length;
1056	req->data = SvREFCNT_inc (data);	1245	req->sv2 = SvREFCNT_inc (data);
1057	req->dataptr = (char *)svptr + dataoffset;	1246	req->ptr2 = (char *)svptr + dataoffset;
		1247	req->stroffset = dataoffset;
1058		1248
1059	if (!SvREADONLY (data))	1249	if (!SvREADONLY (data))
1060	{	1250	{
1061	SvREADONLY_on (data);	1251	SvREADONLY_on (data);
1062	req->data2ptr = (void *)data;	1252	req->flags |= FLAG_SV2_RO_OFF;
1063	}	1253	}
1064		1254
1065	REQ_SEND;	1255	REQ_SEND;
1066	}	1256	}
1067	}	1257	}
1068		1258
1069	void	1259	void
1070	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1260	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1071	SV * out_fh	1261	ALIAS:
1072	SV * in_fh	1262	aio_readlink = EIO_READLINK
1073	UV in_offset	1263	aio_realpath = EIO_REALPATH
1074	UV length
1075	SV * callback
1076	PROTOTYPE: $$$$;$
1077	PPCODE:	1264	PPCODE:
1078	{	1265	{
		1266	dREQ;
		1267
		1268	req->type = ix;
		1269	req_set_path1 (req, pathname);
		1270
		1271	REQ_SEND;
		1272	}
		1273
		1274	void
		1275	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1276	PPCODE:
		1277	{
		1278	int ifd = s_fileno_croak (in_fh , 0);
		1279	int ofd = s_fileno_croak (out_fh, 1);
1079	dREQ;	1280	dREQ;
1080		1281
1081	req->type = REQ_SENDFILE;	1282	req->type = EIO_SENDFILE;
1082	req->fh = newSVsv (out_fh);	1283	req->sv1 = newSVsv (out_fh);
1083	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1284	req->int1 = ofd;
1084	req->fh2 = newSVsv (in_fh);	1285	req->sv2 = newSVsv (in_fh);
1085	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1286	req->int2 = ifd;
1086	req->offset = in_offset;	1287	req->offs = in_offset;
1087	req->length = length;	1288	req->size = length;
1088		1289
1089	REQ_SEND;	1290	REQ_SEND;
1090	}	1291	}
1091		1292
1092	void	1293	void
1093	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1294	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1094	SV * fh
1095	UV offset
1096	IV length
1097	SV * callback
1098	PROTOTYPE: $$$;$
1099	PPCODE:	1295	PPCODE:
1100	{	1296	{
		1297	int fd = s_fileno_croak (fh, 0);
1101	dREQ;	1298	dREQ;
1102		1299
1103	req->type = REQ_READAHEAD;	1300	req->type = EIO_READAHEAD;
1104	req->fh = newSVsv (fh);	1301	req->sv1 = newSVsv (fh);
1105	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1302	req->int1 = fd;
1106	req->offset = offset;	1303	req->offs = offset;
1107	req->length = length;	1304	req->size = length;
1108		1305
1109	REQ_SEND;	1306	REQ_SEND;
1110	}	1307	}
1111		1308
1112	void	1309	void
1113	aio_stat (fh_or_path,callback=&PL_sv_undef)	1310	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1114	SV * fh_or_path
1115	SV * callback
1116	ALIAS:	1311	ALIAS:
1117	aio_stat = REQ_STAT	1312	aio_stat = EIO_STAT
1118	aio_lstat = REQ_LSTAT	1313	aio_lstat = EIO_LSTAT
		1314	aio_statvfs = EIO_STATVFS
1119	PPCODE:	1315	PPCODE:
1120	{	1316	{
1121	dREQ;	1317	dREQ;
1122		1318
1123	New (0, req->statdata, 1, Stat_t);	1319	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1124	if (!req->statdata)
1125	{
1126	req_free (req);
1127	croak ("out of memory during aio_req->statdata allocation");
1128	}
1129
1130	if (SvPOK (fh_or_path))
1131	{
1132	req->type = ix;
1133	req->data = newSVsv (fh_or_path);
1134	req->dataptr = SvPVbyte_nolen (req->data);
1135	}
1136	else
1137	{
1138	req->type = REQ_FSTAT;
1139	req->fh = newSVsv (fh_or_path);
1140	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1141	}
1142		1320
1143	REQ_SEND;	1321	REQ_SEND;
1144	}	1322	}
1145		1323
		1324	UV
		1325	major (UV dev)
		1326	ALIAS:
		1327	minor = 1
		1328	CODE:
		1329	RETVAL = ix ? major (dev) : minor (dev);
		1330	OUTPUT:
		1331	RETVAL
		1332
		1333	UV
		1334	makedev (UV maj, UV min)
		1335	CODE:
		1336	RETVAL = makedev (maj, min);
		1337	OUTPUT:
		1338	RETVAL
		1339
1146	void	1340	void
		1341	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1342	PPCODE:
		1343	{
		1344	dREQ;
		1345
		1346	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1347	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1348	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1349
		1350	REQ_SEND;
		1351	}
		1352
		1353	void
		1354	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1355	PPCODE:
		1356	{
		1357	dREQ;
		1358
		1359	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1360	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1361
		1362	REQ_SEND;
		1363	}
		1364
		1365	void
		1366	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1367	PPCODE:
		1368	{
		1369	dREQ;
		1370
		1371	req->int2 = mode;
		1372	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1373
		1374	REQ_SEND;
		1375	}
		1376
		1377	void
		1378	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1379	PPCODE:
		1380	{
		1381	dREQ;
		1382
		1383	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1384	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1385	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1386
		1387	REQ_SEND;
		1388	}
		1389
		1390	void
		1391	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1392	PPCODE:
		1393	{
		1394	dREQ;
		1395
		1396	req->type = EIO_READDIR;
		1397	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1398
		1399	if (flags & EIO_READDIR_DENTS)
		1400	req->int1 |= EIO_READDIR_CUSTOM2;
		1401
		1402	req_set_path1 (req, pathname);
		1403
		1404	REQ_SEND;
		1405	}
		1406
		1407	void
		1408	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1409	PPCODE:
		1410	{
		1411	dREQ;
		1412
		1413	req->type = EIO_MKDIR;
		1414	req->int2 = mode;
		1415	req_set_path1 (req, pathname);
		1416
		1417	REQ_SEND;
		1418	}
		1419
		1420	void
1147	aio_unlink (pathname,callback=&PL_sv_undef)	1421	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1148	SV * pathname
1149	SV * callback
1150	ALIAS:	1422	ALIAS:
1151	aio_unlink = REQ_UNLINK	1423	aio_unlink = EIO_UNLINK
1152	aio_rmdir = REQ_RMDIR	1424	aio_rmdir = EIO_RMDIR
1153	aio_readdir = REQ_READDIR	1425	aio_readdir = EIO_READDIR
1154	PPCODE:	1426	PPCODE:
1155	{	1427	{
1156	dREQ;	1428	dREQ;
1157		1429
1158	req->type = ix;	1430	req->type = ix;
1159	req->data = newSVsv (pathname);	1431	req_set_path1 (req, pathname);
1160	req->dataptr = SvPVbyte_nolen (req->data);	1432
1161
1162	REQ_SEND;	1433	REQ_SEND;
1163	}	1434	}
1164		1435
1165	void	1436	void
1166	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1437	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1167	SV * oldpath
1168	SV * newpath
1169	SV * callback
1170	ALIAS:	1438	ALIAS:
1171	aio_link = REQ_LINK	1439	aio_link = EIO_LINK
1172	aio_symlink = REQ_SYMLINK	1440	aio_symlink = EIO_SYMLINK
1173	aio_rename = REQ_RENAME	1441	aio_rename = EIO_RENAME
1174	PPCODE:	1442	PPCODE:
1175	{	1443	{
		1444	eio_wd wd2 = 0;
1176	dREQ;	1445	dREQ;
1177		1446
1178	req->type = ix;	1447	req->type = ix;
1179	req->fh = newSVsv (oldpath);	1448	req_set_path1 (req, oldpath);
1180	req->data2ptr = SvPVbyte_nolen (req->fh);	1449	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1181	req->data = newSVsv (newpath);	1450	req->int3 = (long)wd2;
1182	req->dataptr = SvPVbyte_nolen (req->data);
1183		1451
1184	REQ_SEND;	1452	REQ_SEND;
1185	}	1453	}
1186		1454
1187	void	1455	void
1188	aio_sleep (delay,callback=&PL_sv_undef)	1456	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1189	double delay
1190	SV * callback
1191	PPCODE:	1457	PPCODE:
1192	{	1458	{
1193	dREQ;	1459	dREQ;
1194		1460
1195	req->type = REQ_SLEEP;	1461	req->type = EIO_MKNOD;
1196	req->fd = delay < 0. ? 0 : delay;	1462	req->int2 = (mode_t)mode;
1197	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1463	req->offs = dev;
1198		1464	req_set_path1 (req, pathname);
		1465
1199	REQ_SEND;	1466	REQ_SEND;
1200	}	1467	}
1201		1468
1202	void	1469	void
1203	aio_group (callback=&PL_sv_undef)	1470	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1204	SV * callback	1471	ALIAS:
1205	PROTOTYPE: ;$	1472	aio_mtouch = EIO_MTOUCH
		1473	aio_msync = EIO_MSYNC
1206	PPCODE:	1474	PPCODE:
1207	{	1475	{
		1476	STRLEN svlen;
		1477	char *svptr = SvPVbyte (data, svlen);
		1478	UV len = SvUV (length);
		1479
		1480	if (offset < 0)
		1481	offset += svlen;
		1482
		1483	if (offset < 0 || offset > svlen)
		1484	croak ("offset outside of scalar");
		1485
		1486	if (!SvOK (length) || len + offset > svlen)
		1487	len = svlen - offset;
		1488
		1489	{
		1490	dREQ;
		1491
		1492	req->type = ix;
		1493	req->sv2 = SvREFCNT_inc (data);
		1494	req->ptr2 = (char *)svptr + offset;
		1495	req->size = len;
		1496	req->int1 = flags;
		1497
		1498	REQ_SEND;
		1499	}
		1500	}
		1501
		1502	void
		1503	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1504	PPCODE:
		1505	{
		1506	STRLEN svlen;
		1507	char *svptr = SvPVbyte (data, svlen);
		1508	UV len = SvUV (length);
		1509
		1510	if (offset < 0)
		1511	offset += svlen;
		1512
		1513	if (offset < 0 || offset > svlen)
		1514	croak ("offset outside of scalar");
		1515
		1516	if (!SvOK (length) || len + offset > svlen)
		1517	len = svlen - offset;
		1518
		1519	{
		1520	dREQ;
		1521
		1522	req->type = EIO_MLOCK;
		1523	req->sv2 = SvREFCNT_inc (data);
		1524	req->ptr2 = (char *)svptr + offset;
		1525	req->size = len;
		1526
		1527	REQ_SEND;
		1528	}
		1529	}
		1530
		1531	void
		1532	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1533	PPCODE:
		1534	{
		1535	dREQ;
		1536
		1537	req->type = EIO_MLOCKALL;
		1538	req->int1 = flags;
		1539
		1540	REQ_SEND;
		1541	}
		1542
		1543	void
		1544	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1545	PPCODE:
		1546	{
1208	dREQ;	1547	dREQ;
		1548
		1549	req->type = EIO_BUSY;
		1550	req->nv1 = delay < 0. ? 0. : delay;
		1551
		1552	REQ_SEND;
		1553	}
		1554
		1555	void
		1556	aio_group (SV *callback=&PL_sv_undef)
		1557	PPCODE:
		1558	{
		1559	dREQ;
		1560
1209	req->type = REQ_GROUP;	1561	req->type = EIO_GROUP;
		1562
1210	req_send (req);	1563	req_submit (req);
1211	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1564	XPUSHs (req_sv (req, aio_grp_stash));
1212	}	1565	}
		1566
		1567	void
		1568	aio_nop (SV *callback=&PL_sv_undef)
		1569	ALIAS:
		1570	aio_nop = EIO_NOP
		1571	aio_sync = EIO_SYNC
		1572	PPCODE:
		1573	{
		1574	dREQ;
		1575
		1576	req->type = ix;
		1577
		1578	REQ_SEND;
		1579	}
		1580
		1581	int
		1582	aioreq_pri (int pri = 0)
		1583	CODE:
		1584	RETVAL = next_pri;
		1585	if (items > 0)
		1586	{
		1587	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1588	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1589	next_pri = pri;
		1590	}
		1591	OUTPUT:
		1592	RETVAL
		1593
		1594	void
		1595	aioreq_nice (int nice = 0)
		1596	CODE:
		1597	nice = next_pri - nice;
		1598	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1599	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1600	next_pri = nice;
1213		1601
1214	void	1602	void
1215	flush ()	1603	flush ()
1216	PROTOTYPE:
1217	CODE:	1604	CODE:
1218	while (nreqs)	1605	while (eio_nreqs ())
1219	{	1606	{
1220	poll_wait ();	1607	poll_wait ();
1221	poll_cb ();	1608	poll_cb ();
1222	}	1609	}
1223		1610
1224	void	1611	int
1225	poll()	1612	poll ()
1226	PROTOTYPE:
1227	CODE:	1613	CODE:
1228	if (nreqs)
1229	{
1230	poll_wait ();	1614	poll_wait ();
1231	poll_cb ();	1615	RETVAL = poll_cb ();
1232	}
1233
1234	int
1235	poll_fileno()
1236	PROTOTYPE:
1237	CODE:
1238	RETVAL = respipe [0];
1239	OUTPUT:	1616	OUTPUT:
1240	RETVAL	1617	RETVAL
1241		1618
1242	int	1619	int
		1620	poll_fileno ()
		1621	CODE:
		1622	RETVAL = s_epipe_fd (&respipe);
		1623	OUTPUT:
		1624	RETVAL
		1625
		1626	int
1243	poll_cb(...)	1627	poll_cb (...)
1244	PROTOTYPE:	1628	PROTOTYPE:
1245	CODE:	1629	CODE:
1246	RETVAL = poll_cb ();	1630	RETVAL = poll_cb ();
1247	OUTPUT:	1631	OUTPUT:
1248	RETVAL	1632	RETVAL
1249		1633
1250	void	1634	void
1251	poll_wait()	1635	poll_wait ()
1252	PROTOTYPE:
1253	CODE:	1636	CODE:
1254	if (nreqs)
1255	poll_wait ();	1637	poll_wait ();
1256		1638
1257	int	1639	int
1258	nreqs()	1640	nreqs ()
1259	PROTOTYPE:
1260	CODE:	1641	CODE:
1261	RETVAL = nreqs;	1642	RETVAL = eio_nreqs ();
1262	OUTPUT:	1643	OUTPUT:
1263	RETVAL	1644	RETVAL
1264		1645
		1646	int
		1647	nready ()
		1648	CODE:
		1649	RETVAL = eio_nready ();
		1650	OUTPUT:
		1651	RETVAL
		1652
		1653	int
		1654	npending ()
		1655	CODE:
		1656	RETVAL = eio_npending ();
		1657	OUTPUT:
		1658	RETVAL
		1659
		1660	int
		1661	nthreads ()
		1662	CODE:
		1663	RETVAL = eio_nthreads ();
		1664	OUTPUT:
		1665	RETVAL
		1666
		1667	int
		1668	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1669	CODE:
		1670	RETVAL = posix_fadvise (fh, offset, length, advice);
		1671	OUTPUT:
		1672	RETVAL
		1673
		1674	IV
		1675	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1676	CODE:
		1677	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1678	OUTPUT:
		1679	RETVAL
		1680
		1681	void
		1682	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1683	PPCODE:
		1684	sv_unmagic (scalar, MMAP_MAGIC);
		1685	{
		1686	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1687	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1688	if (addr == (void *)-1)
		1689	XSRETURN_NO;
		1690
		1691	sv_force_normal (scalar);
		1692
		1693	/* we store the length in mg_obj, as namlen is I32 :/ */
		1694	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1695	->mg_obj = (SV *)length;
		1696
		1697	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1698
		1699	if (!(prot & PROT_WRITE))
		1700	SvREADONLY_on (scalar);
		1701
		1702	if (SvLEN (scalar))
		1703	Safefree (SvPVX (scalar));
		1704
		1705	SvPVX (scalar) = (char *)addr;
		1706	SvCUR_set (scalar, length);
		1707	SvLEN_set (scalar, 0);
		1708	SvPOK_only (scalar);
		1709
		1710	XSRETURN_YES;
		1711	}
		1712
		1713	void
		1714	munmap (SV *scalar)
		1715	CODE:
		1716	sv_unmagic (scalar, MMAP_MAGIC);
		1717
		1718	int
		1719	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1720	ALIAS:
		1721	mprotect = 1
		1722	CODE:
		1723	{
		1724	STRLEN svlen;
		1725	void *addr = SvPVbyte (scalar, svlen);
		1726	size_t len = SvUV (length);
		1727
		1728	if (offset < 0)
		1729	offset += svlen;
		1730
		1731	if (offset < 0 || offset > svlen)
		1732	croak ("offset outside of scalar");
		1733
		1734	if (!SvOK (length) || len + offset > svlen)
		1735	len = svlen - offset;
		1736
		1737	addr = (void *)(((intptr_t)addr) + offset);
		1738	eio_page_align (&addr, &len);
		1739
		1740	switch (ix)
		1741	{
		1742	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1743	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1744	}
		1745	}
		1746	OUTPUT:
		1747	RETVAL
		1748
		1749	int
		1750	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1751	CODE:
		1752	{
		1753	STRLEN svlen;
		1754	void *addr = SvPVbyte (scalar, svlen);
		1755	size_t len = SvUV (length);
		1756
		1757	if (offset < 0)
		1758	offset += svlen;
		1759
		1760	if (offset < 0 || offset > svlen)
		1761	croak ("offset outside of scalar");
		1762
		1763	if (!SvOK (length) || len + offset > svlen)
		1764	len = svlen - offset;
		1765
		1766	addr = (void *)(((intptr_t)addr) + offset);
		1767	eio_page_align (&addr, &len);
		1768	#if _POSIX_MEMLOCK_RANGE
		1769	RETVAL = munlock (addr, len);
		1770	#else
		1771	RETVAL = ((errno = ENOSYS), -1);
		1772	#endif
		1773	}
		1774	OUTPUT:
		1775	RETVAL
		1776
		1777	int
		1778	munlockall ()
		1779	CODE:
		1780	#if _POSIX_MEMLOCK
		1781	munlockall ();
		1782	#else
		1783	RETVAL = -1;
		1784	errno = ENOSYS;
		1785	#endif
		1786	OUTPUT:
		1787	RETVAL
		1788
		1789	void _on_next_submit (SV *cb)
		1790	CODE:
		1791	SvREFCNT_dec (on_next_submit);
		1792	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1793
1265	PROTOTYPES: DISABLE	1794	PROTOTYPES: DISABLE
1266		1795
		1796	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1797
		1798	BOOT:
		1799	{
		1800	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1801	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1802	}
		1803
		1804	void
		1805	DESTROY (SV *self)
		1806	CODE:
		1807	{
		1808	aio_wd wd = SvAIO_WD (self);
		1809	#if HAVE_AT
		1810	{
		1811	SV *callback = &PL_sv_undef;
		1812	dREQ; /* clobbers next_pri :/ */
		1813	next_pri = req->pri; /* restore next_pri */
		1814	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1815	req->type = EIO_WD_CLOSE;
		1816	req->wd = wd;
		1817	REQ_SEND;
		1818	}
		1819	#else
		1820	eio_wd_close_sync (wd);
		1821	#endif
		1822	}
		1823
1267	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1824	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1268		1825
1269	void	1826	void
1270	cancel (aio_req_ornot req)	1827	cancel (aio_req_ornot req)
1271	PROTOTYPE:
1272	CODE:	1828	CODE:
1273	req_cancel (req);	1829	eio_cancel (req);
		1830
		1831	void
		1832	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1833	PPCODE:
		1834	{
		1835	if (GIMME_V != G_VOID)
		1836	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1837
		1838	if (items > 1)
		1839	{
		1840	SV *cb_cv =get_cb (callback);
		1841
		1842	SvREFCNT_dec (req->callback);
		1843	req->callback = SvREFCNT_inc (cb_cv);
		1844	}
		1845	}
1274		1846
1275	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1847	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1276		1848
1277	void	1849	void
1278	add (aio_req grp, ...)	1850	add (aio_req grp, ...)
1279	PPCODE:	1851	PPCODE:
1280	{	1852	{
1281	int i;	1853	int i;
1282		1854
1283	if (grp->fd == 2)	1855	if (grp->int1 == 2)
1284	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1856	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1285		1857
1286	for (i = 1; i < items; ++i )	1858	for (i = 1; i < items; ++i )
1287	{	1859	{
		1860	aio_req req;
		1861
1288	if (GIMME_V != G_VOID)	1862	if (GIMME_V != G_VOID)
1289	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1863	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1290		1864
1291	aio_req req = SvAIO_REQ (ST (i));	1865	req = SvAIO_REQ (ST (i));
1292		1866
1293	if (req)	1867	if (req)
1294	{	1868	eio_grp_add (grp, req);
1295	++grp->length;
1296	req->grp = grp;
1297
1298	req->grp_prev = 0;
1299	req->grp_next = grp->grp_first;
1300
1301	if (grp->grp_first)
1302	grp->grp_first->grp_prev = req;
1303
1304	grp->grp_first = req;
1305	}
1306	}	1869	}
1307	}	1870	}
		1871
		1872	void
		1873	cancel_subs (aio_req_ornot req)
		1874	CODE:
		1875	req_cancel_subs (req);
1308		1876
1309	void	1877	void
1310	result (aio_req grp, ...)	1878	result (aio_req grp, ...)
1311	CODE:	1879	CODE:
1312	{	1880	{
1313	int i;	1881	int i;
		1882	AV *av;
		1883
		1884	grp->errorno = errno;
		1885
1314	AV *av = newAV ();	1886	av = newAV ();
		1887	av_extend (av, items - 1);
1315		1888
1316	for (i = 1; i < items; ++i )	1889	for (i = 1; i < items; ++i )
1317	av_push (av, newSVsv (ST (i)));	1890	av_push (av, newSVsv (ST (i)));
1318		1891
1319	SvREFCNT_dec (grp->data);	1892	SvREFCNT_dec (grp->sv1);
1320	grp->data = (SV *)av;	1893	grp->sv1 = (SV *)av;
1321	}	1894	}
1322		1895
1323	void	1896	void
1324	lock (aio_req grp)	1897	errno (aio_req grp, int errorno = errno)
		1898	CODE:
		1899	grp->errorno = errorno;
		1900
		1901	void
		1902	limit (aio_req grp, int limit)
1325	CODE:	1903	CODE:
1326	++grp->length;	1904	eio_grp_limit (grp, limit);
1327		1905
1328	void	1906	void
1329	unlock (aio_req grp)	1907	feed (aio_req grp, SV *callback=&PL_sv_undef)
1330	CODE:	1908	CODE:
1331	aio_grp_dec (grp);
1332
1333	void
1334	feeder_limit (aio_req grp, int limit)
1335	CODE:
1336	grp->fd2 = limit;
1337	aio_grp_feed (grp);
1338
1339	void
1340	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
1341	CODE:
1342	{	1909	{
1343	SvREFCNT_dec (grp->fh2);	1910	SvREFCNT_dec (grp->sv2);
1344	grp->fh2 = newSVsv (callback);	1911	grp->sv2 = newSVsv (callback);
		1912	grp->feed = aio_grp_feed;
1345		1913
1346	if (grp->fd2 <= 0)	1914	if (grp->int2 <= 0)
1347	grp->fd2 = 2;	1915	grp->int2 = 2;
1348		1916
1349	aio_grp_feed (grp);	1917	eio_grp_limit (grp, grp->int2);
1350	}	1918	}
1351		1919

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