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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.51 by root, Sun Oct 22 22:14:33 2006 UTC vs.
Revision 1.212 by root, Sun Apr 8 00:11:50 2012 UTC

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

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