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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.59 by root, Mon Oct 23 18:56:27 2006 UTC vs.
Revision 1.203 by root, Thu Sep 29 23:06:24 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_GROUP, REQ_NOP,
61	REQ_SLEEP,
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 pri;
89	unsigned char flags;
90	} aio_cb;
91
92	enum {
93	FLAG_CANCELLED = 0x01,
94	};
95
96	typedef aio_cb *aio_req;	333	typedef eio_req *aio_req;
97	typedef aio_cb *aio_req_ornot;	334	typedef eio_req *aio_req_ornot;
		335	typedef eio_wd aio_wd;
98		336
99	static int started, wanted;	337	static SV *on_next_submit;
100	static volatile int nreqs;	338	static int next_pri = EIO_PRI_DEFAULT;
101	static int max_outstanding = 1<<30;	339	static int max_outstanding;
102	static int respipe [2];
103		340
104	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	341	static s_epipe respipe;
105	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
106	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
107		342
108	static volatile aio_req reqs, reqe; /* queue start, queue end */	343	static void req_destroy (aio_req req);
109	static volatile aio_req ress, rese; /* queue start, queue end */
110
111	static void req_invoke (aio_req req);	344	static void req_cancel (aio_req req);
112	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	}
113		359
114	/* must be called at most once */	360	/* must be called at most once */
115	static SV *req_sv (aio_req req, const char *klass)	361	static SV *
		362	req_sv (aio_req req, HV *stash)
116	{	363	{
117	if (!req->self)	364	if (!req->self)
118	{	365	{
119	req->self = (SV *)newHV ();	366	req->self = (SV *)newHV ();
120	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	367	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
121	}	368	}
122		369
123	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	370	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
124	}	371	}
125		372
126	static aio_req SvAIO_REQ (SV *sv)	373	static SV *
		374	newSVaio_wd (aio_wd wd)
		375	{
		376	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		377	}
		378
		379	static aio_req
		380	SvAIO_REQ (SV *sv)
127	{	381	{
128	MAGIC *mg;	382	MAGIC *mg;
129		383
130	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	384	if (!SvROK (sv)
		385	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		386	&& SvSTASH (SvRV (sv)) != aio_req_stash
		387	&& !sv_derived_from (sv, "IO::AIO::REQ")))
131	croak ("object of class " AIO_REQ_KLASS " expected");	388	croak ("object of class IO::AIO::REQ expected");
132		389
133	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	390	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
134		391
135	return mg ? (aio_req)mg->mg_ptr : 0;	392	return mg ? (aio_req)mg->mg_ptr : 0;
136	}	393	}
137		394
		395	static aio_wd
		396	SvAIO_WD (SV *sv)
		397	{
		398	if (!SvROK (sv)
		399	|| SvSTASH (SvRV (sv)) != aio_wd_stash
		400	|| SvTYPE (SvRV (sv)) != SVt_PVMG)
		401	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		402
		403	return (aio_wd)(long)SvIVX (SvRV (sv));
		404	}
		405
		406	static void
138	static void aio_grp_feed (aio_req grp)	407	aio_grp_feed (aio_req grp)
139	{	408	{
140	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	409	if (grp->sv2 && SvOK (grp->sv2))
141	{	410	{
142	int old_len = grp->length;	411	dSP;
143		412
144	if (grp->fh2 && SvOK (grp->fh2))	413	ENTER;
		414	SAVETMPS;
		415	PUSHMARK (SP);
		416	XPUSHs (req_sv (grp, aio_grp_stash));
		417	PUTBACK;
		418	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		419	SPAGAIN;
		420	FREETMPS;
		421	LEAVE;
		422	}
		423	}
		424
		425	static void
		426	req_submit (eio_req *req)
		427	{
		428	eio_submit (req);
		429
		430	if (expect_false (on_next_submit))
		431	{
		432	dSP;
		433	SV *cb = sv_2mortal (on_next_submit);
		434
		435	on_next_submit = 0;
		436
		437	PUSHMARK (SP);
		438	PUTBACK;
		439	call_sv (cb, G_DISCARD | G_EVAL);
		440	}
		441	}
		442
		443	static int
		444	req_invoke (eio_req *req)
		445	{
		446	if (req->flags & FLAG_SV2_RO_OFF)
		447	SvREADONLY_off (req->sv2);
		448
		449	if (!EIO_CANCELLED (req) && req->callback)
		450	{
		451	dSP;
		452	static SV *sv_result_cache; /* caches the result integer SV */
		453	SV *sv_result;
		454
		455	ENTER;
		456	SAVETMPS;
		457	PUSHMARK (SP);
		458	EXTEND (SP, 1);
		459
		460	/* do not recreate the result IV from scratch each time */
		461	if (expect_true (sv_result_cache))
145	{	462	{
146	dSP;	463	sv_result = sv_result_cache; sv_result_cache = 0;
147		464	SvIV_set (sv_result, req->result);
148	ENTER;	465	SvIOK_only (sv_result);
149	SAVETMPS;
150	PUSHMARK (SP);
151	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
152	PUTBACK;
153	call_sv (grp->fh2, G_VOID | G_EVAL);
154	SPAGAIN;
155	FREETMPS;
156	LEAVE;
157	}	466	}
158		467	else
159	/* stop if no progress has been made */
160	if (old_len == grp->length)
161	{	468	{
162	SvREFCNT_dec (grp->fh2);	469	sv_result = newSViv (req->result);
163	grp->fh2 = 0;	470	SvREADONLY_on (sv_result);
164	break;
165	}	471	}
		472
		473	switch (req->type)
		474	{
		475	case EIO_WD_OPEN:
		476	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		477	break;
		478
		479	case EIO_READDIR:
		480	{
		481	SV *rv = &PL_sv_undef;
		482
		483	if (req->result >= 0)
		484	{
		485	int i;
		486	char *names = (char *)req->ptr2;
		487	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		488	AV *av = newAV ();
		489
		490	av_extend (av, req->result - 1);
		491
		492	for (i = 0; i < req->result; ++i)
		493	{
		494	if (req->int1 & EIO_READDIR_DENTS)
		495	{
		496	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		497
		498	if (req->int1 & EIO_READDIR_CUSTOM2)
		499	{
		500	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		501	AV *avent = newAV ();
		502
		503	av_extend (avent, 2);
		504
		505	if (!sv_type [ent->type])
		506	{
		507	sv_type [ent->type] = newSViv (ent->type);
		508	SvREADONLY_on (sv_type [ent->type]);
		509	}
		510
		511	av_store (avent, 0, namesv);
		512	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		513	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		514
		515	av_store (av, i, newRV_noinc ((SV *)avent));
		516	}
		517	else
		518	av_store (av, i, namesv);
		519
		520	++ent;
		521	}
		522	else
		523	{
		524	SV *name = newSVpv (names, 0);
		525	av_store (av, i, name);
		526	names += SvCUR (name) + 1;
		527	}
		528	}
		529
		530	rv = sv_2mortal (newRV_noinc ((SV *)av));
		531	}
		532
		533	PUSHs (rv);
		534
		535	if (req->int1 & EIO_READDIR_CUSTOM1)
		536	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		537	}
		538	break;
		539
		540	case EIO_OPEN:
		541	{
		542	/* convert fd to fh */
		543	SV *fh = &PL_sv_undef;
		544
		545	if (req->result >= 0)
		546	{
		547	GV *gv = (GV *)sv_newmortal ();
		548	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		549	char sym [64];
		550	int symlen;
		551
		552	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		553	gv_init (gv, aio_stash, sym, symlen, 0);
		554
		555	symlen = snprintf (
		556	sym,
		557	sizeof (sym),
		558	"%s&=%d",
		559	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		560	(int)req->result
		561	);
		562
		563	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		564	fh = (SV *)gv;
		565	}
		566
		567	PUSHs (fh);
		568	}
		569	break;
		570
		571	case EIO_STATVFS:
		572	case EIO_FSTATVFS:
		573	{
		574	SV *rv = &PL_sv_undef;
		575
		576	#ifndef _WIN32
		577	if (req->result >= 0)
		578	{
		579	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		580	HV *hv = newHV ();
		581
		582	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		583
		584	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		585	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		586	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		587	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		588	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		589	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		590	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		591	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		592	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		593	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		594	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		595	}
		596	#endif
		597
		598	PUSHs (rv);
		599	}
		600
		601	break;
		602
		603	case EIO_GROUP:
		604	req->int1 = 2; /* mark group as finished */
		605
		606	if (req->sv1)
		607	{
		608	int i;
		609	AV *av = (AV *)req->sv1;
		610
		611	EXTEND (SP, AvFILL (av) + 1);
		612	for (i = 0; i <= AvFILL (av); ++i)
		613	PUSHs (*av_fetch (av, i, 0));
		614	}
		615	break;
		616
		617	case EIO_NOP:
		618	case EIO_BUSY:
		619	break;
		620
		621	case EIO_READLINK:
		622	case EIO_REALPATH:
		623	if (req->result > 0)
		624	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		625	break;
		626
		627	case EIO_STAT:
		628	case EIO_LSTAT:
		629	case EIO_FSTAT:
		630	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		631
		632	if (!(PL_laststatval = req->result))
		633	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		634	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		635
		636	PUSHs (sv_result);
		637	break;
		638
		639	case EIO_READ:
		640	{
		641	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		642	*SvEND (req->sv2) = 0;
		643	SvPOK_only (req->sv2);
		644	SvSETMAGIC (req->sv2);
		645	PUSHs (sv_result);
		646	}
		647	break;
		648
		649	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		650	if (req->result > 0)
		651	SvIV_set (sv_result, 0);
		652	/* FALLTHROUGH */
		653
		654	default:
		655	PUSHs (sv_result);
		656	break;
		657	}
		658
		659	errno = req->errorno;
		660
		661	PUTBACK;
		662	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		663	SPAGAIN;
		664
		665	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		666	SvREFCNT_dec (sv_result);
		667	else
		668	sv_result_cache = sv_result;
		669
		670	FREETMPS;
		671	LEAVE;
		672
		673	PUTBACK;
166	}	674	}
167	}
168		675
169	static void aio_grp_dec (aio_req grp)	676	return !!SvTRUE (ERRSV);
170	{
171	--grp->length;
172
173	/* call feeder, if applicable */
174	aio_grp_feed (grp);
175
176	/* finish, if done */
177	if (!grp->length && grp->fd)
178	{
179	req_invoke (grp);
180	req_free (grp);
181	}
182	}	677	}
183		678
184	static void poll_wait ()	679	static void
		680	req_destroy (aio_req req)
185	{	681	{
186	if (nreqs && !ress)
187	{
188	fd_set rfd;
189	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);
191
192	select (respipe [0] + 1, &rfd, 0, 0, 0);
193	}
194	}
195
196	static void req_invoke (aio_req req)
197	{
198	dSP;
199	int errorno = errno;
200
201	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
202	return;
203
204	errno = req->errorno;
205
206	ENTER;
207	SAVETMPS;
208	PUSHMARK (SP);
209	EXTEND (SP, 1);
210
211	switch (req->type)
212	{
213	case REQ_READDIR:
214	{
215	SV *rv = &PL_sv_undef;
216
217	if (req->result >= 0)
218	{
219	char *buf = req->data2ptr;
220	AV *av = newAV ();
221
222	while (req->result)
223	{
224	SV *sv = newSVpv (buf, 0);
225
226	av_push (av, sv);
227	buf += SvCUR (sv) + 1;
228	req->result--;
229	}
230
231	rv = sv_2mortal (newRV_noinc ((SV *)av));
232	}
233
234	PUSHs (rv);
235	}
236	break;
237
238	case REQ_OPEN:
239	{
240	/* convert fd to fh */
241	SV *fh;
242
243	PUSHs (sv_2mortal (newSViv (req->result)));
244	PUTBACK;
245	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
246	SPAGAIN;
247
248	fh = SvREFCNT_inc (POPs);
249
250	PUSHMARK (SP);
251	XPUSHs (sv_2mortal (fh));
252	}
253	break;
254
255	case REQ_GROUP:
256	req->fd = 2; /* mark group as finished */
257
258	if (req->data)
259	{
260	int i;
261	AV *av = (AV *)req->data;
262
263	EXTEND (SP, AvFILL (av) + 1);
264	for (i = 0; i <= AvFILL (av); ++i)
265	PUSHs (*av_fetch (av, i, 0));
266	}
267	break;
268
269	case REQ_NOP:
270	case REQ_SLEEP:
271	break;
272
273	default:
274	PUSHs (sv_2mortal (newSViv (req->result)));
275	break;
276	}
277
278
279	PUTBACK;
280	call_sv (req->callback, G_VOID | G_EVAL);
281	SPAGAIN;
282
283	FREETMPS;
284	LEAVE;
285
286	errno = errorno;
287
288	if (SvTRUE (ERRSV))
289	{
290	req_free (req);
291	croak (0);
292	}
293	}
294
295	static void req_free (aio_req req)
296	{
297	if (req->grp)
298	{
299	aio_req grp = req->grp;
300
301	/* unlink request */
302	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
303	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
304
305	if (grp->grp_first == req)
306	grp->grp_first = req->grp_next;
307
308	aio_grp_dec (grp);
309	}
310
311	if (req->self)	682	if (req->self)
312	{	683	{
313	sv_unmagic (req->self, PERL_MAGIC_ext);	684	sv_unmagic (req->self, PERL_MAGIC_ext);
314	SvREFCNT_dec (req->self);	685	SvREFCNT_dec (req->self);
315	}	686	}
316		687
317	SvREFCNT_dec (req->data);
318	SvREFCNT_dec (req->fh);	688	SvREFCNT_dec (req->sv1);
319	SvREFCNT_dec (req->fh2);	689	SvREFCNT_dec (req->sv2);
		690	SvREFCNT_dec (req->sv3);
		691	SvREFCNT_dec (req->sv4);
320	SvREFCNT_dec (req->callback);	692	SvREFCNT_dec (req->callback);
321	Safefree (req->statdata);
322
323	if (req->type == REQ_READDIR && req->result >= 0)
324	free (req->data2ptr);
325		693
326	Safefree (req);	694	Safefree (req);
327	}	695	}
328		696
329	static void req_cancel (aio_req req)	697	static void
		698	req_cancel_subs (aio_req grp)
330	{	699	{
331	req->flags |= FLAG_CANCELLED;
332
333	if (req->type == REQ_GROUP)	700	if (grp->type != EIO_GROUP)
		701	return;
		702
		703	SvREFCNT_dec (grp->sv2);
		704	grp->sv2 = 0;
		705
		706	eio_grp_cancel (grp);
		707	}
		708
		709	static void ecb_cold
		710	create_respipe (void)
		711	{
		712	if (s_epipe_renew (&respipe))
		713	croak ("IO::AIO: unable to initialize result pipe");
		714	}
		715
		716	static void
		717	poll_wait (void)
		718	{
		719	while (eio_nreqs ())
334	{	720	{
335	aio_req sub;	721	int size;
336		722
337	for (sub = req->grp_first; sub; sub = sub->grp_next)	723	X_LOCK (reslock);
338	req_cancel (sub);	724	size = res_queue.size;
		725	X_UNLOCK (reslock);
		726
		727	if (size)
		728	return;
		729
		730	etp_maybe_start_thread ();
		731
		732	s_epipe_wait (&respipe);
339	}	733	}
340	}	734	}
341		735
342	static int poll_cb ()	736	static int
		737	poll_cb (void)
343	{	738	{
344	dSP;
345	int count = 0;
346	int do_croak = 0;
347	aio_req req;
348
349	for (;;)	739	for (;;)
350	{	740	{
351	pthread_mutex_lock (&reslock);	741	int res = eio_poll ();
352	req = ress;
353		742
354	if (req)	743	if (res > 0)
		744	croak (0);
		745
		746	if (!max_outstanding || max_outstanding > eio_nreqs ())
		747	return res;
		748
		749	poll_wait ();
		750	}
		751	}
		752
		753	static void ecb_cold
		754	reinit (void)
		755	{
		756	create_respipe ();
		757
		758	if (eio_init (want_poll, done_poll) < 0)
		759	croak ("IO::AIO: unable to initialise eio library");
		760	}
		761
		762	/*****************************************************************************/
		763
		764	#if !_POSIX_MAPPED_FILES
		765	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		766	# define munmap(addr,length) (errno = ENOSYS, -1)
		767	#endif
		768
		769	#if !_POSIX_MEMORY_PROTECTION
		770	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		771	# define PROT_NONE 0
		772	# define PROT_WRITE 0
		773	# define MAP_PRIVATE 0
		774	# define MAP_SHARED 0
		775	# define MAP_FIXED 0
		776	#endif
		777
		778	#define MMAP_MAGIC PERL_MAGIC_ext
		779
		780	static int ecb_cold
		781	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		782	{
		783	int old_errno = errno;
		784	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		785	errno = old_errno;
		786
		787	mg->mg_obj = 0; /* just in case */
		788
		789	SvREADONLY_off (sv);
		790
		791	if (SvPVX (sv) != mg->mg_ptr)
		792	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		793
		794	SvCUR_set (sv, 0);
		795	SvPVX (sv) = 0;
		796	SvOK_off (sv);
		797
		798	return 0;
		799	}
		800
		801	static MGVTBL mmap_vtbl = {
		802	0, 0, 0, 0, mmap_free
		803	};
		804
		805	/*****************************************************************************/
		806
		807	static SV *
		808	get_cb (SV *cb_sv)
		809	{
		810	SvGETMAGIC (cb_sv);
		811	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		812	}
		813
		814	static aio_req ecb_noinline
		815	dreq (SV *callback)
		816	{
		817	SV *cb_cv;
		818	aio_req req;
		819	int req_pri = next_pri;
		820	next_pri = EIO_PRI_DEFAULT;
		821
		822	cb_cv = get_cb (callback);
		823
		824	Newz (0, req, 1, eio_req);
		825	if (!req)
		826	croak ("out of memory during eio_req allocation");
		827
		828	req->callback = SvREFCNT_inc (cb_cv);
		829	req->pri = req_pri;
		830
		831	return req;
		832	}
		833
		834	#define dREQ \
		835	aio_req req = dreq (callback); \
		836
		837	#define REQ_SEND \
		838	PUTBACK; \
		839	req_submit (req); \
		840	SPAGAIN; \
		841	\
		842	if (GIMME_V != G_VOID) \
		843	XPUSHs (req_sv (req, aio_req_stash));
		844
		845	ecb_inline void
		846	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		847	{
		848	if (expect_false (SvROK (path)))
		849	{
		850	AV *av = (AV *)SvRV (path);
		851	SV *wdob;
		852
		853	if (SvTYPE (av) != SVt_PVAV || AvFILLp (av) != 1)
		854	croak ("IO::AIO: pathname arguments must be specified as strings or [wd, path] arrayrefs");
		855
		856	path = AvARRAY (av)[1];
		857	wdob = AvARRAY (av)[0];
		858
		859	if (SvOK (wdob))
355	{	860	{
356	ress = req->next;	861	*wd = SvAIO_WD (wdob);
357		862	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
358	if (!ress)
359	{
360	/* read any signals sent by the worker threads */
361	char buf [32];
362	while (read (respipe [0], buf, 32) == 32)
363	;
364
365	rese = 0;
366	}
367	}
368
369	pthread_mutex_unlock (&reslock);
370
371	if (!req)
372	break;
373
374	--nreqs;
375
376	if (req->type == REQ_QUIT)
377	started--;
378	else if (req->type == REQ_GROUP && req->length)
379	{
380	req->fd = 1; /* mark request as delayed */
381	continue;
382	}	863	}
383	else	864	else
384	{	865	*wd = EIO_INVALID_WD;
385	if (req->type == REQ_READ)
386	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
387
388	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
389	SvREADONLY_off (req->data);
390
391	if (req->statdata)
392	{
393	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
394	PL_laststatval = req->result;
395	PL_statcache = *(req->statdata);
396	}
397
398	req_invoke (req);
399
400	count++;
401	}
402
403	req_free (req);
404	}	866	}
405		867
406	return count;	868	*pathsv = newSVsv (path);
		869	*ptr = SvPVbyte_nolen (*pathsv);
407	}	870	}
408		871
409	static void *aio_proc(void *arg);	872	static void ecb_noinline
410		873	req_set_path1 (aio_req req, SV *path)
411	static void start_thread (void)
412	{	874	{
413	sigset_t fullsigset, oldsigset;	875	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
414	pthread_t tid;
415	pthread_attr_t attr;
416
417	pthread_attr_init (&attr);
418	pthread_attr_setstacksize (&attr, STACKSIZE);
419	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
420
421	sigfillset (&fullsigset);
422	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
423
424	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
425	started++;
426
427	sigprocmask (SIG_SETMASK, &oldsigset, 0);
428	}	876	}
429		877
430	static void req_send (aio_req req)	878	static void ecb_noinline
		879	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
431	{	880	{
432	while (started < wanted && nreqs >= started)	881	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
433	start_thread ();
434		882
435	++nreqs;	883	switch (SvTYPE (rv))
436
437	pthread_mutex_lock (&reqlock);
438
439	req->next = 0;
440
441	if (reqe)
442	{	884	{
443	reqe->next = req;	885	case SVt_PVIO:
444	reqe = req;	886	case SVt_PVLV:
		887	case SVt_PVGV:
		888	req->type = type_fh;
		889	req->sv1 = newSVsv (fh_or_path);
		890	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		891	break;
		892
		893	default:
		894	req->type = type_path;
		895	req_set_path1 (req, fh_or_path);
		896	break;
445	}	897	}
446	else
447	reqe = reqs = req;
448
449	pthread_cond_signal (&reqwait);
450	pthread_mutex_unlock (&reqlock);
451
452	if (nreqs > max_outstanding)
453	for (;;)
454	{
455	poll_cb ();
456
457	if (nreqs <= max_outstanding)
458	break;
459
460	poll_wait ();
461	}
462	}	898	}
463		899
464	static void end_thread (void)	900	XS(boot_IO__AIO) ecb_cold;
465	{
466	aio_req req;
467	Newz (0, req, 1, aio_cb);
468	req->type = REQ_QUIT;
469		901
470	req_send (req);	902	MODULE = IO::AIO PACKAGE = IO::AIO
471	}
472		903
473	static void min_parallel (int nthreads)	904	PROTOTYPES: ENABLE
474	{
475	if (wanted < nthreads)
476	wanted = nthreads;
477	}
478		905
479	static void max_parallel (int nthreads)	906	BOOT:
480	{	907	{
481	int cur = started;	908	static const struct {
		909	const char *name;
		910	IV iv;
		911	} *civ, const_iv[] = {
		912	# define const_niv(name, value) { # name, (IV) value },
		913	# define const_iv(name) { # name, (IV) name },
		914	# define const_eio(name) { # name, (IV) EIO_ ## name },
		915	const_iv (EXDEV)
		916	const_iv (ENOSYS)
		917	const_iv (O_RDONLY)
		918	const_iv (O_WRONLY)
		919	const_iv (O_RDWR)
		920	const_iv (O_CREAT)
		921	const_iv (O_TRUNC)
		922	const_iv (O_EXCL)
		923	const_iv (O_APPEND)
482		924
483	if (wanted > nthreads)	925	const_iv (O_ASYNC)
484	wanted = nthreads;	926	const_iv (O_DIRECT)
		927	const_iv (O_NOATIME)
485		928
486	while (cur > wanted)	929	const_iv (O_CLOEXEC)
487	{	930	const_iv (O_NOCTTY)
488	end_thread ();	931	const_iv (O_NOFOLLOW)
489	cur--;	932	const_iv (O_NONBLOCK)
490	}	933	const_iv (O_EXEC)
		934	const_iv (O_SEARCH)
		935	const_iv (O_DIRECTORY)
		936	const_iv (O_DSYNC)
		937	const_iv (O_RSYNC)
		938	const_iv (O_SYNC)
		939	const_iv (O_TTY_INIT)
491		940
492	while (started > wanted)	941	const_iv (S_IFIFO)
493	{	942	const_iv (S_IFCHR)
494	poll_wait ();	943	const_iv (S_IFBLK)
495	poll_cb ();	944	const_iv (S_IFLNK)
496	}	945	const_iv (S_IFREG)
497	}	946	const_iv (S_IFDIR)
		947	const_iv (S_IFWHT)
		948	const_iv (S_IFSOCK)
		949	const_iv (S_IFMT)
498		950
499	static void create_pipe ()	951	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
500	{	952	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
501	if (pipe (respipe))	953	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
502	croak ("unable to initialize result pipe");	954	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		955	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		956	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
503		957
504	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	958	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
505	croak ("cannot set result pipe to nonblocking mode");	959	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		960	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		961	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		962	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
506		963
507	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	964	const_iv (ST_RDONLY)
508	croak ("cannot set result pipe to nonblocking mode");	965	const_iv (ST_NOSUID)
509	}	966	const_iv (ST_NODEV)
		967	const_iv (ST_NOEXEC)
		968	const_iv (ST_SYNCHRONOUS)
		969	const_iv (ST_MANDLOCK)
		970	const_iv (ST_WRITE)
		971	const_iv (ST_APPEND)
		972	const_iv (ST_IMMUTABLE)
		973	const_iv (ST_NOATIME)
		974	const_iv (ST_NODIRATIME)
		975	const_iv (ST_RELATIME)
510		976
511	/*****************************************************************************/	977	const_iv (PROT_NONE)
512	/* work around various missing functions */	978	const_iv (PROT_EXEC)
		979	const_iv (PROT_READ)
		980	const_iv (PROT_WRITE)
513		981
514	#if !HAVE_PREADWRITE	982	/*const_iv (MAP_FIXED)*/
515	# define pread aio_pread	983	const_iv (MAP_PRIVATE)
516	# define pwrite aio_pwrite	984	const_iv (MAP_SHARED)
		985	const_iv (MAP_ANONYMOUS)
517		986
518	/*	987	/* linuxish */
519	* make our pread/pwrite safe against themselves, but not against	988	const_iv (MAP_HUGETLB)
520	* normal read/write by using a mutex. slows down execution a lot,	989	const_iv (MAP_LOCKED)
521	* but that's your problem, not mine.	990	const_iv (MAP_NORESERVE)
522	*/	991	const_iv (MAP_POPULATE)
523	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	992	const_iv (MAP_NONBLOCK)
524		993
525	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	994	const_eio (MCL_FUTURE)
526	{	995	const_eio (MCL_CURRENT)
527	ssize_t res;
528	off_t ooffset;
529		996
530	pthread_mutex_lock (&preadwritelock);	997	const_eio (MS_ASYNC)
531	ooffset = lseek (fd, 0, SEEK_CUR);	998	const_eio (MS_INVALIDATE)
532	lseek (fd, offset, SEEK_SET);	999	const_eio (MS_SYNC)
533	res = read (fd, buf, count);
534	lseek (fd, ooffset, SEEK_SET);
535	pthread_mutex_unlock (&preadwritelock);
536		1000
537	return res;	1001	const_eio (MT_MODIFY)
538	}
539		1002
540	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1003	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
541	{	1004	const_eio (SYNC_FILE_RANGE_WRITE)
542	ssize_t res;	1005	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
543	off_t ooffset;
544		1006
545	pthread_mutex_lock (&preadwritelock);	1007	const_eio (FALLOC_FL_KEEP_SIZE)
546	ooffset = lseek (fd, 0, SEEK_CUR);
547	lseek (fd, offset, SEEK_SET);
548	res = write (fd, buf, count);
549	lseek (fd, offset, SEEK_SET);
550	pthread_mutex_unlock (&preadwritelock);
551		1008
552	return res;	1009	const_eio (READDIR_DENTS)
553	}	1010	const_eio (READDIR_DIRS_FIRST)
554	#endif	1011	const_eio (READDIR_STAT_ORDER)
		1012	const_eio (READDIR_FOUND_UNKNOWN)
555		1013
556	#if !HAVE_FDATASYNC	1014	const_eio (DT_UNKNOWN)
557	# define fdatasync fsync	1015	const_eio (DT_FIFO)
558	#endif	1016	const_eio (DT_CHR)
559		1017	const_eio (DT_DIR)
560	#if !HAVE_READAHEAD	1018	const_eio (DT_BLK)
561	# define readahead aio_readahead	1019	const_eio (DT_REG)
562		1020	const_eio (DT_LNK)
563	static ssize_t readahead (int fd, off_t offset, size_t count)	1021	const_eio (DT_SOCK)
564	{	1022	const_eio (DT_WHT)
565	char readahead_buf[4096];
566
567	while (count > 0)
568	{
569	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
570
571	pread (fd, readahead_buf, len, offset);
572	offset += len;
573	count -= len;
574	}
575
576	errno = 0;
577	}
578	#endif
579
580	#if !HAVE_READDIR_R
581	# define readdir_r aio_readdir_r
582
583	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
584
585	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
586	{
587	struct dirent *e;
588	int errorno;
589
590	pthread_mutex_lock (&readdirlock);
591
592	e = readdir (dirp);
593	errorno = errno;
594
595	if (e)
596	{
597	*res = ent;
598	strcpy (ent->d_name, e->d_name);
599	}
600	else
601	*res = 0;
602
603	pthread_mutex_unlock (&readdirlock);
604
605	errno = errorno;
606	return e ? 0 : -1;
607	}
608	#endif
609
610	/* sendfile always needs emulation */
611	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
612	{
613	ssize_t res;
614
615	if (!count)
616	return 0;
617
618	#if HAVE_SENDFILE
619	# if __linux
620	res = sendfile (ofd, ifd, &offset, count);
621
622	# elif __freebsd
623	/*
624	* Of course, the freebsd sendfile is a dire hack with no thoughts
625	* wasted on making it similar to other I/O functions.
626	*/
627	{
628	off_t sbytes;
629	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
630
631	if (res < 0 && sbytes)
632	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
633	res = sbytes;
634	}	1023	};
635		1024
636	# elif __hpux	1025	aio_stash = gv_stashpv ("IO::AIO" , 1);
637	res = sendfile (ofd, ifd, offset, count, 0, 0);	1026	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1027	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1028	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
638		1029
639	# elif __solaris	1030	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
640	{	1031	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
641	struct sendfilevec vec;
642	size_t sbytes;
643		1032
644	vec.sfv_fd = ifd;	1033	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
645	vec.sfv_flag = 0;
646	vec.sfv_off = offset;
647	vec.sfv_len = count;
648		1034
649	res = sendfilev (ofd, &vec, 1, &sbytes);	1035	reinit ();
		1036	}
650		1037
651	if (res < 0 && sbytes)	1038	void
		1039	reinit ()
		1040	PROTOTYPE:
		1041
		1042	void
		1043	max_poll_reqs (unsigned int nreqs)
		1044	PROTOTYPE: $
		1045	CODE:
		1046	eio_set_max_poll_reqs (nreqs);
		1047
		1048	void
		1049	max_poll_time (double nseconds)
		1050	PROTOTYPE: $
		1051	CODE:
		1052	eio_set_max_poll_time (nseconds);
		1053
		1054	void
		1055	min_parallel (unsigned int nthreads)
		1056	PROTOTYPE: $
		1057	CODE:
		1058	eio_set_min_parallel (nthreads);
		1059
		1060	void
		1061	max_parallel (unsigned int nthreads)
		1062	PROTOTYPE: $
		1063	CODE:
		1064	eio_set_max_parallel (nthreads);
		1065
		1066	void
		1067	max_idle (unsigned int nthreads)
		1068	PROTOTYPE: $
		1069	CODE:
		1070	eio_set_max_idle (nthreads);
		1071
		1072	void
		1073	idle_timeout (unsigned int seconds)
		1074	PROTOTYPE: $
		1075	CODE:
		1076	eio_set_idle_timeout (seconds);
		1077
		1078	void
		1079	max_outstanding (unsigned int maxreqs)
		1080	PROTOTYPE: $
		1081	CODE:
		1082	max_outstanding = maxreqs;
		1083
		1084	void
		1085	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1086	PPCODE:
		1087	{
		1088	dREQ;
		1089
		1090	req->type = EIO_WD_OPEN;
		1091	req_set_path1 (req, pathname);
		1092
		1093	REQ_SEND;
		1094	}
		1095
		1096	void
		1097	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1098	PPCODE:
		1099	{
		1100	dREQ;
		1101
		1102	req->type = EIO_OPEN;
		1103	req_set_path1 (req, pathname);
		1104	req->int1 = flags;
		1105	req->int2 = mode;
		1106
		1107	REQ_SEND;
		1108	}
		1109
		1110	void
		1111	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1112	ALIAS:
		1113	aio_fsync = EIO_FSYNC
		1114	aio_fdatasync = EIO_FDATASYNC
		1115	aio_syncfs = EIO_SYNCFS
		1116	PPCODE:
		1117	{
		1118	int fd = s_fileno_croak (fh, 0);
		1119	dREQ;
		1120
		1121	req->type = ix;
		1122	req->sv1 = newSVsv (fh);
		1123	req->int1 = fd;
		1124
		1125	REQ_SEND (req);
		1126	}
		1127
		1128	void
		1129	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1130	PPCODE:
		1131	{
		1132	int fd = s_fileno_croak (fh, 0);
		1133	dREQ;
		1134
		1135	req->type = EIO_SYNC_FILE_RANGE;
		1136	req->sv1 = newSVsv (fh);
		1137	req->int1 = fd;
		1138	req->offs = offset;
652	res = sbytes;	1139	req->size = nbytes;
653	}	1140	req->int2 = flags;
654		1141
655	# endif	1142	REQ_SEND (req);
		1143	}
		1144
		1145	void
		1146	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1147	PPCODE:
		1148	{
		1149	int fd = s_fileno_croak (fh, 0);
		1150	dREQ;
		1151
		1152	req->type = EIO_FALLOCATE;
		1153	req->sv1 = newSVsv (fh);
		1154	req->int1 = fd;
		1155	req->int2 = mode;
		1156	req->offs = offset;
		1157	req->size = len;
		1158
		1159	REQ_SEND (req);
		1160	}
		1161
		1162	void
		1163	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1164	PPCODE:
		1165	{
		1166	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1167	int fd = s_fileno_croak (fh, 0);
		1168	dREQ;
		1169
		1170	if (expect_false (close_fd < 0))
		1171	{
		1172	int pipefd [2];
		1173
		1174	if (
		1175	#ifdef _WIN32
		1176	_pipe (pipefd, 1, _O_BINARY) < 0
656	#else	1177	#else
657	res = -1;	1178	pipe (pipefd) < 0
658	errno = ENOSYS;	1179	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
659	#endif	1180	#endif
660		1181	|| close (pipefd [1]) < 0
661	if (res < 0
662	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
663	#if __solaris
664	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
665	#endif
666	)
667	)
668	{
669	/* emulate sendfile. this is a major pain in the ass */
670	char buf[4096];
671	res = 0;
672
673	while (count)
674	{
675	ssize_t cnt;
676
677	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
678
679	if (cnt <= 0)
680	{	1182	)
681	if (cnt && !res) res = -1;	1183	abort (); /*D*/
682	break;
683	}
684		1184
685	cnt = write (ofd, buf, cnt);	1185	close_fd = pipefd [0];
686
687	if (cnt <= 0)
688	{
689	if (cnt && !res) res = -1;
690	break;
691	}
692
693	offset += cnt;
694	res += cnt;
695	count -= cnt;
696	}
697	}
698
699	return res;
700	}
701
702	/* read a full directory */
703	static int scandir_ (const char *path, void **namesp)
704	{
705	DIR *dirp = opendir (path);
706	union
707	{
708	struct dirent d;
709	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
710	} u;
711	struct dirent *entp;
712	char *name, *names;
713	int memlen = 4096;
714	int memofs = 0;
715	int res = 0;
716	int errorno;
717
718	if (!dirp)
719	return -1;
720
721	names = malloc (memlen);
722
723	for (;;)
724	{
725	errno = 0, readdir_r (dirp, &u.d, &entp);
726
727	if (!entp)
728	break;
729
730	name = entp->d_name;
731
732	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
733	{
734	int len = strlen (name) + 1;
735
736	res++;
737
738	while (memofs + len > memlen)
739	{
740	memlen *= 2;
741	names = realloc (names, memlen);
742	if (!names)
743	break;
744	}
745
746	memcpy (names + memofs, name, len);
747	memofs += len;
748	}
749	}
750
751	errorno = errno;
752	closedir (dirp);
753
754	if (errorno)
755	{
756	free (names);
757	errno = errorno;
758	res = -1;
759	}
760
761	*namesp = (void *)names;
762	return res;
763	}
764
765	/*****************************************************************************/
766
767	static void *aio_proc (void *thr_arg)
768	{
769	aio_req req;
770	int type;
771
772	do
773	{
774	pthread_mutex_lock (&reqlock);
775
776	for (;;)
777	{
778	req = reqs;
779
780	if (reqs)
781	{
782	reqs = reqs->next;
783	if (!reqs) reqe = 0;
784	}
785
786	if (req)
787	break;
788
789	pthread_cond_wait (&reqwait, &reqlock);
790	}
791
792	pthread_mutex_unlock (&reqlock);
793
794	errno = 0; /* strictly unnecessary */
795
796	if (!(req->flags & FLAG_CANCELLED))
797	switch (type = req->type) /* remember type for QUIT check */
798	{
799	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
800	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
801
802	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
803	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
804
805	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
806	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
807	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
808
809	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
810	case REQ_CLOSE: req->result = close (req->fd); break;
811	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
812	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
813	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
814	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
815	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
816
817	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
818	case REQ_FSYNC: req->result = fsync (req->fd); break;
819	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
820
821	case REQ_SLEEP:
822	{
823	struct timeval tv;
824
825	tv.tv_sec = req->fd;
826	tv.tv_usec = req->fd2;
827
828	req->result = select (0, 0, 0, 0, &tv);
829	}
830
831	case REQ_GROUP:
832	case REQ_NOP:
833	case REQ_QUIT:
834	break;
835
836	default:
837	req->result = ENOSYS;
838	break;
839	}	1186	}
840		1187
841	req->errorno = errno;
842
843	pthread_mutex_lock (&reslock);
844
845	req->next = 0;
846
847	if (rese)
848	{
849	rese->next = req;
850	rese = req;
851	}
852	else
853	{
854	rese = ress = req;
855
856	/* write a dummy byte to the pipe so fh becomes ready */
857	write (respipe [1], &respipe, 1);
858	}
859
860	pthread_mutex_unlock (&reslock);
861	}
862	while (type != REQ_QUIT);
863
864	return 0;
865	}
866
867	/*****************************************************************************/
868
869	static void atfork_prepare (void)
870	{
871	pthread_mutex_lock (&reqlock);
872	pthread_mutex_lock (&reslock);
873	#if !HAVE_PREADWRITE
874	pthread_mutex_lock (&preadwritelock);
875	#endif
876	#if !HAVE_READDIR_R
877	pthread_mutex_lock (&readdirlock);
878	#endif
879	}
880
881	static void atfork_parent (void)
882	{
883	#if !HAVE_READDIR_R
884	pthread_mutex_unlock (&readdirlock);
885	#endif
886	#if !HAVE_PREADWRITE
887	pthread_mutex_unlock (&preadwritelock);
888	#endif
889	pthread_mutex_unlock (&reslock);
890	pthread_mutex_unlock (&reqlock);
891	}
892
893	static void atfork_child (void)
894	{
895	aio_req prv;
896
897	started = 0;
898
899	while (reqs)
900	{
901	prv = reqs;
902	reqs = prv->next;
903	req_free (prv);
904	}
905
906	reqs = reqe = 0;
907
908	while (ress)
909	{
910	prv = ress;
911	ress = prv->next;
912	req_free (prv);
913	}
914
915	ress = rese = 0;
916
917	close (respipe [0]);
918	close (respipe [1]);
919	create_pipe ();
920
921	atfork_parent ();
922	}
923
924	#define dREQ \
925	aio_req req; \
926	\
927	if (SvOK (callback) && !SvROK (callback)) \
928	croak ("callback must be undef or of reference type"); \
929	\
930	Newz (0, req, 1, aio_cb); \
931	if (!req) \
932	croak ("out of memory during aio_req allocation"); \
933	\
934	req->callback = newSVsv (callback)
935
936	#define REQ_SEND \
937	req_send (req); \
938	\
939	if (GIMME_V != G_VOID) \
940	XPUSHs (req_sv (req, AIO_REQ_KLASS));
941
942	MODULE = IO::AIO PACKAGE = IO::AIO
943
944	PROTOTYPES: ENABLE
945
946	BOOT:
947	{
948	HV *stash = gv_stashpv ("IO::AIO", 1);
949	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
950	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
951	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
952
953	create_pipe ();
954	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
955	}
956
957	void
958	min_parallel (nthreads)
959	int nthreads
960	PROTOTYPE: $
961
962	void
963	max_parallel (nthreads)
964	int nthreads
965	PROTOTYPE: $
966
967	int
968	max_outstanding (nreqs)
969	int nreqs
970	PROTOTYPE: $
971	CODE:
972	RETVAL = max_outstanding;
973	max_outstanding = nreqs;
974
975	void
976	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
977	SV * pathname
978	int flags
979	int mode
980	SV * callback
981	PROTOTYPE: $$$;$
982	PPCODE:
983	{
984	dREQ;
985
986	req->type = REQ_OPEN;	1188	req->type = EIO_DUP2;
		1189	req->int1 = close_fd;
987	req->data = newSVsv (pathname);	1190	req->sv2 = newSVsv (fh);
988	req->dataptr = SvPVbyte_nolen (req->data);	1191	req->int2 = fd;
989	req->fd = flags;
990	req->mode = mode;
991		1192
992	REQ_SEND;	1193	REQ_SEND (req);
993	}	1194	}
994		1195
995	void	1196	void
996	aio_close (fh,callback=&PL_sv_undef)	1197	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
997	SV * fh
998	SV * callback
999	PROTOTYPE: $;$
1000	ALIAS:	1198	ALIAS:
1001	aio_close = REQ_CLOSE
1002	aio_fsync = REQ_FSYNC
1003	aio_fdatasync = REQ_FDATASYNC
1004	PPCODE:
1005	{
1006	dREQ;
1007
1008	req->type = ix;
1009	req->fh = newSVsv (fh);
1010	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1011
1012	REQ_SEND (req);
1013	}
1014
1015	void
1016	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1017	SV * fh
1018	UV offset
1019	UV length
1020	SV * data
1021	UV dataoffset
1022	SV * callback
1023	ALIAS:
1024	aio_read = REQ_READ	1199	aio_read = EIO_READ
1025	aio_write = REQ_WRITE	1200	aio_write = EIO_WRITE
1026	PROTOTYPE: $$$$$;$
1027	PPCODE:	1201	PPCODE:
1028	{	1202	{
1029	aio_req req;
1030	STRLEN svlen;	1203	STRLEN svlen;
		1204	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1031	char *svptr = SvPVbyte (data, svlen);	1205	char *svptr = SvPVbyte (data, svlen);
1032		1206	UV len = SvUV (length);
1033	SvUPGRADE (data, SVt_PV);
1034	SvPOK_on (data);
1035		1207
1036	if (dataoffset < 0)	1208	if (dataoffset < 0)
1037	dataoffset += svlen;	1209	dataoffset += svlen;
1038		1210
1039	if (dataoffset < 0 || dataoffset > svlen)	1211	if (dataoffset < 0 || dataoffset > svlen)
1040	croak ("data offset outside of string");	1212	croak ("dataoffset outside of data scalar");
1041		1213
1042	if (ix == REQ_WRITE)	1214	if (ix == EIO_WRITE)
1043	{	1215	{
1044	/* write: check length and adjust. */	1216	/* write: check length and adjust. */
1045	if (length < 0 || length + dataoffset > svlen)	1217	if (!SvOK (length) || len + dataoffset > svlen)
1046	length = svlen - dataoffset;	1218	len = svlen - dataoffset;
1047	}	1219	}
1048	else	1220	else
1049	{	1221	{
1050	/* read: grow scalar as necessary */	1222	/* read: check type and grow scalar as necessary */
		1223	SvUPGRADE (data, SVt_PV);
1051	svptr = SvGROW (data, length + dataoffset);	1224	svptr = SvGROW (data, len + dataoffset + 1);
1052	}	1225	}
1053
1054	if (length < 0)
1055	croak ("length must not be negative");
1056		1226
1057	{	1227	{
1058	dREQ;	1228	dREQ;
1059		1229
1060	req->type = ix;	1230	req->type = ix;
1061	req->fh = newSVsv (fh);	1231	req->sv1 = newSVsv (fh);
1062	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1232	req->int1 = fd;
1063	: IoOFP (sv_2io (fh)));	1233	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1064	req->offset = offset;	1234	req->size = len;
1065	req->length = length;
1066	req->data = SvREFCNT_inc (data);	1235	req->sv2 = SvREFCNT_inc (data);
1067	req->dataptr = (char *)svptr + dataoffset;	1236	req->ptr2 = (char *)svptr + dataoffset;
		1237	req->stroffset = dataoffset;
1068		1238
1069	if (!SvREADONLY (data))	1239	if (!SvREADONLY (data))
1070	{	1240	{
1071	SvREADONLY_on (data);	1241	SvREADONLY_on (data);
1072	req->data2ptr = (void *)data;	1242	req->flags |= FLAG_SV2_RO_OFF;
1073	}	1243	}
1074		1244
1075	REQ_SEND;	1245	REQ_SEND;
1076	}	1246	}
1077	}	1247	}
1078		1248
1079	void	1249	void
1080	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1250	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1081	SV * out_fh	1251	ALIAS:
1082	SV * in_fh	1252	aio_readlink = EIO_READLINK
1083	UV in_offset	1253	aio_realpath = EIO_REALPATH
1084	UV length
1085	SV * callback
1086	PROTOTYPE: $$$$;$
1087	PPCODE:	1254	PPCODE:
1088	{	1255	{
		1256	dREQ;
		1257
		1258	req->type = ix;
		1259	req_set_path1 (req, pathname);
		1260
		1261	REQ_SEND;
		1262	}
		1263
		1264	void
		1265	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1266	PPCODE:
		1267	{
		1268	int ifd = s_fileno_croak (in_fh , 0);
		1269	int ofd = s_fileno_croak (out_fh, 1);
1089	dREQ;	1270	dREQ;
1090		1271
1091	req->type = REQ_SENDFILE;	1272	req->type = EIO_SENDFILE;
1092	req->fh = newSVsv (out_fh);	1273	req->sv1 = newSVsv (out_fh);
1093	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1274	req->int1 = ofd;
1094	req->fh2 = newSVsv (in_fh);	1275	req->sv2 = newSVsv (in_fh);
1095	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1276	req->int2 = ifd;
1096	req->offset = in_offset;	1277	req->offs = in_offset;
1097	req->length = length;	1278	req->size = length;
1098		1279
1099	REQ_SEND;	1280	REQ_SEND;
1100	}	1281	}
1101		1282
1102	void	1283	void
1103	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1284	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1104	SV * fh
1105	UV offset
1106	IV length
1107	SV * callback
1108	PROTOTYPE: $$$;$
1109	PPCODE:	1285	PPCODE:
1110	{	1286	{
		1287	int fd = s_fileno_croak (fh, 0);
1111	dREQ;	1288	dREQ;
1112		1289
1113	req->type = REQ_READAHEAD;	1290	req->type = EIO_READAHEAD;
1114	req->fh = newSVsv (fh);	1291	req->sv1 = newSVsv (fh);
1115	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1292	req->int1 = fd;
1116	req->offset = offset;	1293	req->offs = offset;
1117	req->length = length;	1294	req->size = length;
1118		1295
1119	REQ_SEND;	1296	REQ_SEND;
1120	}	1297	}
1121		1298
1122	void	1299	void
1123	aio_stat (fh_or_path,callback=&PL_sv_undef)	1300	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1124	SV * fh_or_path
1125	SV * callback
1126	ALIAS:	1301	ALIAS:
1127	aio_stat = REQ_STAT	1302	aio_stat = EIO_STAT
1128	aio_lstat = REQ_LSTAT	1303	aio_lstat = EIO_LSTAT
		1304	aio_statvfs = EIO_STATVFS
1129	PPCODE:	1305	PPCODE:
1130	{	1306	{
1131	dREQ;	1307	dREQ;
1132		1308
1133	New (0, req->statdata, 1, Stat_t);	1309	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1134	if (!req->statdata)
1135	{
1136	req_free (req);
1137	croak ("out of memory during aio_req->statdata allocation");
1138	}
1139
1140	if (SvPOK (fh_or_path))
1141	{
1142	req->type = ix;
1143	req->data = newSVsv (fh_or_path);
1144	req->dataptr = SvPVbyte_nolen (req->data);
1145	}
1146	else
1147	{
1148	req->type = REQ_FSTAT;
1149	req->fh = newSVsv (fh_or_path);
1150	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1151	}
1152		1310
1153	REQ_SEND;	1311	REQ_SEND;
1154	}	1312	}
1155		1313
		1314	UV
		1315	major (UV dev)
		1316	ALIAS:
		1317	minor = 1
		1318	CODE:
		1319	RETVAL = ix ? major (dev) : minor (dev);
		1320	OUTPUT:
		1321	RETVAL
		1322
		1323	UV
		1324	makedev (UV maj, UV min)
		1325	CODE:
		1326	RETVAL = makedev (maj, min);
		1327	OUTPUT:
		1328	RETVAL
		1329
1156	void	1330	void
		1331	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1332	PPCODE:
		1333	{
		1334	dREQ;
		1335
		1336	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1337	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1338	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1339
		1340	REQ_SEND;
		1341	}
		1342
		1343	void
		1344	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1345	PPCODE:
		1346	{
		1347	dREQ;
		1348
		1349	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1350	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1351
		1352	REQ_SEND;
		1353	}
		1354
		1355	void
		1356	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1357	PPCODE:
		1358	{
		1359	dREQ;
		1360
		1361	req->int2 = mode;
		1362	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1363
		1364	REQ_SEND;
		1365	}
		1366
		1367	void
		1368	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1369	PPCODE:
		1370	{
		1371	dREQ;
		1372
		1373	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1374	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1375	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1376
		1377	REQ_SEND;
		1378	}
		1379
		1380	void
		1381	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1382	PPCODE:
		1383	{
		1384	dREQ;
		1385
		1386	req->type = EIO_READDIR;
		1387	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1388
		1389	if (flags & EIO_READDIR_DENTS)
		1390	req->int1 |= EIO_READDIR_CUSTOM2;
		1391
		1392	req_set_path1 (req, pathname);
		1393
		1394	REQ_SEND;
		1395	}
		1396
		1397	void
		1398	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1399	PPCODE:
		1400	{
		1401	dREQ;
		1402
		1403	req->type = EIO_MKDIR;
		1404	req->int2 = mode;
		1405	req_set_path1 (req, pathname);
		1406
		1407	REQ_SEND;
		1408	}
		1409
		1410	void
1157	aio_unlink (pathname,callback=&PL_sv_undef)	1411	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1158	SV * pathname
1159	SV * callback
1160	ALIAS:	1412	ALIAS:
1161	aio_unlink = REQ_UNLINK	1413	aio_unlink = EIO_UNLINK
1162	aio_rmdir = REQ_RMDIR	1414	aio_rmdir = EIO_RMDIR
1163	aio_readdir = REQ_READDIR	1415	aio_readdir = EIO_READDIR
1164	PPCODE:	1416	PPCODE:
1165	{	1417	{
1166	dREQ;	1418	dREQ;
1167		1419
1168	req->type = ix;	1420	req->type = ix;
1169	req->data = newSVsv (pathname);	1421	req_set_path1 (req, pathname);
1170	req->dataptr = SvPVbyte_nolen (req->data);	1422
		1423	REQ_SEND;
		1424	}
		1425
		1426	void
		1427	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1428	ALIAS:
		1429	aio_link = EIO_LINK
		1430	aio_symlink = EIO_SYMLINK
		1431	aio_rename = EIO_RENAME
		1432	PPCODE:
		1433	{
		1434	dREQ;
		1435	eio_wd wd2 = 0;
		1436
		1437	req->type = ix;
		1438	req_set_path1 (req, oldpath);
		1439	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1440	req->int3 = (long)wd2;
1171		1441
1172	REQ_SEND;	1442	REQ_SEND;
1173	}	1443	}
1174		1444
1175	void	1445	void
1176	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1446	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1177	SV * oldpath
1178	SV * newpath
1179	SV * callback
1180	ALIAS:
1181	aio_link = REQ_LINK
1182	aio_symlink = REQ_SYMLINK
1183	aio_rename = REQ_RENAME
1184	PPCODE:	1447	PPCODE:
1185	{	1448	{
1186	dREQ;	1449	dREQ;
1187		1450
1188	req->type = ix;	1451	req->type = EIO_MKNOD;
1189	req->fh = newSVsv (oldpath);	1452	req->int2 = (mode_t)mode;
1190	req->data2ptr = SvPVbyte_nolen (req->fh);	1453	req->offs = dev;
1191	req->data = newSVsv (newpath);	1454	req_set_path1 (req, pathname);
1192	req->dataptr = SvPVbyte_nolen (req->data);
1193		1455
1194	REQ_SEND;	1456	REQ_SEND;
1195	}	1457	}
1196		1458
1197	void	1459	void
		1460	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1461	ALIAS:
		1462	aio_mtouch = EIO_MTOUCH
		1463	aio_msync = EIO_MSYNC
		1464	PPCODE:
		1465	{
		1466	STRLEN svlen;
		1467	char *svptr = SvPVbyte (data, svlen);
		1468	UV len = SvUV (length);
		1469
		1470	if (offset < 0)
		1471	offset += svlen;
		1472
		1473	if (offset < 0 || offset > svlen)
		1474	croak ("offset outside of scalar");
		1475
		1476	if (!SvOK (length) || len + offset > svlen)
		1477	len = svlen - offset;
		1478
		1479	{
		1480	dREQ;
		1481
		1482	req->type = ix;
		1483	req->sv2 = SvREFCNT_inc (data);
		1484	req->ptr2 = (char *)svptr + offset;
		1485	req->size = len;
		1486	req->int1 = flags;
		1487
		1488	REQ_SEND;
		1489	}
		1490	}
		1491
		1492	void
		1493	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1494	PPCODE:
		1495	{
		1496	STRLEN svlen;
		1497	char *svptr = SvPVbyte (data, svlen);
		1498	UV len = SvUV (length);
		1499
		1500	if (offset < 0)
		1501	offset += svlen;
		1502
		1503	if (offset < 0 || offset > svlen)
		1504	croak ("offset outside of scalar");
		1505
		1506	if (!SvOK (length) || len + offset > svlen)
		1507	len = svlen - offset;
		1508
		1509	{
		1510	dREQ;
		1511
		1512	req->type = EIO_MLOCK;
		1513	req->sv2 = SvREFCNT_inc (data);
		1514	req->ptr2 = (char *)svptr + offset;
		1515	req->size = len;
		1516
		1517	REQ_SEND;
		1518	}
		1519	}
		1520
		1521	void
		1522	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1523	PPCODE:
		1524	{
		1525	dREQ;
		1526
		1527	req->type = EIO_MLOCKALL;
		1528	req->int1 = flags;
		1529
		1530	REQ_SEND;
		1531	}
		1532
		1533	void
1198	aio_sleep (delay,callback=&PL_sv_undef)	1534	aio_busy (double delay, SV *callback=&PL_sv_undef)
1199	double delay
1200	SV * callback
1201	PPCODE:	1535	PPCODE:
1202	{	1536	{
1203	dREQ;	1537	dREQ;
1204		1538
1205	req->type = REQ_SLEEP;	1539	req->type = EIO_BUSY;
1206	req->fd = delay < 0. ? 0 : delay;	1540	req->nv1 = delay < 0. ? 0. : delay;
1207	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1208		1541
1209	REQ_SEND;	1542	REQ_SEND;
1210	}	1543	}
1211		1544
1212	void	1545	void
1213	aio_group (callback=&PL_sv_undef)	1546	aio_group (SV *callback=&PL_sv_undef)
1214	SV * callback
1215	PROTOTYPE: ;$
1216	PPCODE:	1547	PPCODE:
1217	{	1548	{
1218	dREQ;	1549	dREQ;
		1550
1219	req->type = REQ_GROUP;	1551	req->type = EIO_GROUP;
		1552
1220	req_send (req);	1553	req_submit (req);
1221	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1554	XPUSHs (req_sv (req, aio_grp_stash));
1222	}	1555	}
1223		1556
1224	void	1557	void
1225	aio_nop (callback=&PL_sv_undef)	1558	aio_nop (SV *callback=&PL_sv_undef)
1226	SV * callback	1559	ALIAS:
		1560	aio_nop = EIO_NOP
		1561	aio_sync = EIO_SYNC
1227	PPCODE:	1562	PPCODE:
1228	{	1563	{
1229	dREQ;	1564	dREQ;
1230		1565
1231	req->type = REQ_NOP;	1566	req->type = ix;
1232		1567
1233	REQ_SEND;	1568	REQ_SEND;
1234	}	1569	}
1235		1570
		1571	int
		1572	aioreq_pri (int pri = 0)
		1573	CODE:
		1574	RETVAL = next_pri;
		1575	if (items > 0)
		1576	{
		1577	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1578	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1579	next_pri = pri;
		1580	}
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	void
		1585	aioreq_nice (int nice = 0)
		1586	CODE:
		1587	nice = next_pri - nice;
		1588	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1589	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1590	next_pri = nice;
		1591
1236	void	1592	void
1237	flush ()	1593	flush ()
1238	PROTOTYPE:
1239	CODE:	1594	CODE:
1240	while (nreqs)	1595	while (eio_nreqs ())
1241	{	1596	{
1242	poll_wait ();	1597	poll_wait ();
1243	poll_cb ();	1598	poll_cb ();
1244	}	1599	}
1245		1600
1246	void	1601	int
1247	poll()	1602	poll ()
1248	PROTOTYPE:
1249	CODE:	1603	CODE:
1250	if (nreqs)
1251	{
1252	poll_wait ();	1604	poll_wait ();
1253	poll_cb ();	1605	RETVAL = poll_cb ();
1254	}
1255
1256	int
1257	poll_fileno()
1258	PROTOTYPE:
1259	CODE:
1260	RETVAL = respipe [0];
1261	OUTPUT:	1606	OUTPUT:
1262	RETVAL	1607	RETVAL
1263		1608
1264	int	1609	int
		1610	poll_fileno ()
		1611	CODE:
		1612	RETVAL = s_epipe_fd (&respipe);
		1613	OUTPUT:
		1614	RETVAL
		1615
		1616	int
1265	poll_cb(...)	1617	poll_cb (...)
1266	PROTOTYPE:	1618	PROTOTYPE:
1267	CODE:	1619	CODE:
1268	RETVAL = poll_cb ();	1620	RETVAL = poll_cb ();
1269	OUTPUT:	1621	OUTPUT:
1270	RETVAL	1622	RETVAL
1271		1623
1272	void	1624	void
1273	poll_wait()	1625	poll_wait ()
1274	PROTOTYPE:
1275	CODE:	1626	CODE:
1276	if (nreqs)
1277	poll_wait ();	1627	poll_wait ();
1278		1628
1279	int	1629	int
1280	nreqs()	1630	nreqs ()
1281	PROTOTYPE:
1282	CODE:	1631	CODE:
1283	RETVAL = nreqs;	1632	RETVAL = eio_nreqs ();
1284	OUTPUT:	1633	OUTPUT:
1285	RETVAL	1634	RETVAL
1286		1635
		1636	int
		1637	nready ()
		1638	CODE:
		1639	RETVAL = eio_nready ();
		1640	OUTPUT:
		1641	RETVAL
		1642
		1643	int
		1644	npending ()
		1645	CODE:
		1646	RETVAL = eio_npending ();
		1647	OUTPUT:
		1648	RETVAL
		1649
		1650	int
		1651	nthreads ()
		1652	CODE:
		1653	RETVAL = eio_nthreads ();
		1654	OUTPUT:
		1655	RETVAL
		1656
		1657	int
		1658	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1659	CODE:
		1660	RETVAL = posix_fadvise (fh, offset, length, advice);
		1661	OUTPUT:
		1662	RETVAL
		1663
		1664	IV
		1665	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1666	CODE:
		1667	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1668	OUTPUT:
		1669	RETVAL
		1670
		1671	void
		1672	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1673	PPCODE:
		1674	sv_unmagic (scalar, MMAP_MAGIC);
		1675	{
		1676	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1677	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1678	if (addr == (void *)-1)
		1679	XSRETURN_NO;
		1680
		1681	sv_force_normal (scalar);
		1682
		1683	/* we store the length in mg_obj, as namlen is I32 :/ */
		1684	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1685	->mg_obj = (SV *)length;
		1686
		1687	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1688
		1689	if (!(prot & PROT_WRITE))
		1690	SvREADONLY_on (scalar);
		1691
		1692	if (SvLEN (scalar))
		1693	Safefree (SvPVX (scalar));
		1694
		1695	SvPVX (scalar) = (char *)addr;
		1696	SvCUR_set (scalar, length);
		1697	SvLEN_set (scalar, 0);
		1698	SvPOK_only (scalar);
		1699
		1700	XSRETURN_YES;
		1701	}
		1702
		1703	void
		1704	munmap (SV *scalar)
		1705	CODE:
		1706	sv_unmagic (scalar, MMAP_MAGIC);
		1707
		1708	int
		1709	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1710	ALIAS:
		1711	mprotect = 1
		1712	CODE:
		1713	{
		1714	STRLEN svlen;
		1715	void *addr = SvPVbyte (scalar, svlen);
		1716	size_t len = SvUV (length);
		1717
		1718	if (offset < 0)
		1719	offset += svlen;
		1720
		1721	if (offset < 0 || offset > svlen)
		1722	croak ("offset outside of scalar");
		1723
		1724	if (!SvOK (length) || len + offset > svlen)
		1725	len = svlen - offset;
		1726
		1727	addr = (void *)(((intptr_t)addr) + offset);
		1728	eio_page_align (&addr, &len);
		1729
		1730	switch (ix)
		1731	{
		1732	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1733	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1734	}
		1735	}
		1736	OUTPUT:
		1737	RETVAL
		1738
		1739	int
		1740	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1741	CODE:
		1742	{
		1743	STRLEN svlen;
		1744	void *addr = SvPVbyte (scalar, svlen);
		1745	size_t len = SvUV (length);
		1746
		1747	if (offset < 0)
		1748	offset += svlen;
		1749
		1750	if (offset < 0 || offset > svlen)
		1751	croak ("offset outside of scalar");
		1752
		1753	if (!SvOK (length) || len + offset > svlen)
		1754	len = svlen - offset;
		1755
		1756	addr = (void *)(((intptr_t)addr) + offset);
		1757	eio_page_align (&addr, &len);
		1758	#if _POSIX_MEMLOCK_RANGE
		1759	RETVAL = munlock (addr, len);
		1760	#else
		1761	RETVAL = ((errno = ENOSYS), -1);
		1762	#endif
		1763	}
		1764	OUTPUT:
		1765	RETVAL
		1766
		1767	int
		1768	munlockall ()
		1769	CODE:
		1770	#if _POSIX_MEMLOCK
		1771	munlockall ();
		1772	#else
		1773	RETVAL = -1;
		1774	errno = ENOSYS;
		1775	#endif
		1776	OUTPUT:
		1777	RETVAL
		1778
		1779	void _on_next_submit (SV *cb)
		1780	CODE:
		1781	SvREFCNT_dec (on_next_submit);
		1782	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1783
1287	PROTOTYPES: DISABLE	1784	PROTOTYPES: DISABLE
1288		1785
		1786	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1787
		1788	BOOT:
		1789	{
		1790	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1791	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1792	}
		1793
		1794	void
		1795	DESTROY (SV *self)
		1796	CODE:
		1797	{
		1798	aio_wd wd = SvAIO_WD (self);
		1799	#if HAVE_AT
		1800	{
		1801	SV *callback = &PL_sv_undef;
		1802	dREQ; /* clobbers next_pri :/ */
		1803	next_pri = req->pri; /* restore next_pri */
		1804	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1805	req->type = EIO_WD_CLOSE;
		1806	req->wd = wd;
		1807	REQ_SEND;
		1808	}
		1809	#else
		1810	eio_wd_close_sync (wd);
		1811	#endif
		1812	}
		1813
1289	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1814	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1290		1815
1291	void	1816	void
1292	cancel (aio_req_ornot req)	1817	cancel (aio_req_ornot req)
1293	PROTOTYPE:
1294	CODE:	1818	CODE:
1295	req_cancel (req);	1819	eio_cancel (req);
1296		1820
1297	void	1821	void
1298	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1822	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1299	CODE:	1823	PPCODE:
		1824	{
		1825	if (GIMME_V != G_VOID)
		1826	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1827
		1828	if (items > 1)
		1829	{
		1830	SV *cb_cv =get_cb (callback);
		1831
1300	SvREFCNT_dec (req->callback);	1832	SvREFCNT_dec (req->callback);
1301	req->callback = newSVsv (callback);	1833	req->callback = SvREFCNT_inc (cb_cv);
		1834	}
		1835	}
1302		1836
1303	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1837	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1304		1838
1305	void	1839	void
1306	add (aio_req grp, ...)	1840	add (aio_req grp, ...)
1307	PPCODE:	1841	PPCODE:
1308	{	1842	{
1309	int i;	1843	int i;
1310	aio_req req;
1311		1844
1312	if (grp->fd == 2)	1845	if (grp->int1 == 2)
1313	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1846	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1314		1847
1315	for (i = 1; i < items; ++i )	1848	for (i = 1; i < items; ++i )
1316	{	1849	{
		1850	aio_req req;
		1851
1317	if (GIMME_V != G_VOID)	1852	if (GIMME_V != G_VOID)
1318	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1853	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1319		1854
1320	req = SvAIO_REQ (ST (i));	1855	req = SvAIO_REQ (ST (i));
1321		1856
1322	if (req)	1857	if (req)
1323	{	1858	eio_grp_add (grp, req);
1324	++grp->length;
1325	req->grp = grp;
1326
1327	req->grp_prev = 0;
1328	req->grp_next = grp->grp_first;
1329
1330	if (grp->grp_first)
1331	grp->grp_first->grp_prev = req;
1332
1333	grp->grp_first = req;
1334	}
1335	}	1859	}
1336	}	1860	}
		1861
		1862	void
		1863	cancel_subs (aio_req_ornot req)
		1864	CODE:
		1865	req_cancel_subs (req);
1337		1866
1338	void	1867	void
1339	result (aio_req grp, ...)	1868	result (aio_req grp, ...)
1340	CODE:	1869	CODE:
1341	{	1870	{
1342	int i;	1871	int i;
		1872	AV *av;
		1873
		1874	grp->errorno = errno;
		1875
1343	AV *av = newAV ();	1876	av = newAV ();
		1877	av_extend (av, items - 1);
1344		1878
1345	for (i = 1; i < items; ++i )	1879	for (i = 1; i < items; ++i )
1346	av_push (av, newSVsv (ST (i)));	1880	av_push (av, newSVsv (ST (i)));
1347		1881
1348	SvREFCNT_dec (grp->data);	1882	SvREFCNT_dec (grp->sv1);
1349	grp->data = (SV *)av;	1883	grp->sv1 = (SV *)av;
1350	}	1884	}
1351		1885
1352	void	1886	void
		1887	errno (aio_req grp, int errorno = errno)
		1888	CODE:
		1889	grp->errorno = errorno;
		1890
		1891	void
1353	feed_limit (aio_req grp, int limit)	1892	limit (aio_req grp, int limit)
1354	CODE:	1893	CODE:
1355	grp->fd2 = limit;	1894	eio_grp_limit (grp, limit);
1356	aio_grp_feed (grp);
1357		1895
1358	void	1896	void
1359	feed (aio_req grp, SV *callback=&PL_sv_undef)	1897	feed (aio_req grp, SV *callback=&PL_sv_undef)
1360	CODE:	1898	CODE:
1361	{	1899	{
1362	SvREFCNT_dec (grp->fh2);	1900	SvREFCNT_dec (grp->sv2);
1363	grp->fh2 = newSVsv (callback);	1901	grp->sv2 = newSVsv (callback);
		1902	grp->feed = aio_grp_feed;
1364		1903
1365	if (grp->fd2 <= 0)	1904	if (grp->int2 <= 0)
1366	grp->fd2 = 2;	1905	grp->int2 = 2;
1367		1906
1368	aio_grp_feed (grp);	1907	eio_grp_limit (grp, grp->int2);
1369	}	1908	}
1370		1909

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