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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.54 by root, Mon Oct 23 00:34:36 2006 UTC vs.
Revision 1.208 by root, Sat Jan 7 18:42:43 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
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	#define EIO_STRUCT_STAT struct _stati64
		68	#define EIO_STRUCT_STATI64
		69
		70	#else
		71
31	# include <sys/socket.h>	72	#include <sys/time.h>
32	# elif __solaris /* not yet */
33	# include <sys/sendfile.h>	73	#include <sys/select.h>
		74	#include <unistd.h>
		75	#include <utime.h>
		76	#include <signal.h>
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	#endif
		81
		82	/* use NV for 32 bit perls as it allows larger offsets */
		83	#if IVSIZE >= 8
		84	# define VAL64 IV
		85	# define SvVAL64 SvIV
		86	# define newSVval64 newSViv
		87	#else
		88	# define VAL64 NV
		89	# define SvVAL64 SvNV
		90	# define newSVval64 newSVnv
		91	#endif
		92
		93	/*****************************************************************************/
		94
		95	#if __GNUC__ >= 3
		96	# define expect(expr,value) __builtin_expect ((expr),(value))
		97	#else
		98	# define expect(expr,value) (expr)
		99	#endif
		100
		101	#define expect_false(expr) expect ((expr) != 0, 0)
		102	#define expect_true(expr) expect ((expr) != 0, 1)
		103
		104	/*****************************************************************************/
		105
		106	typedef SV SV8; /* byte-sv, used for argument-checking */
		107	typedef int aio_rfd; /* read file desriptor */
		108	typedef int aio_wfd; /* write file descriptor */
		109
		110	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		111
		112	#define EIO_REQ_MEMBERS \
		113	SV *callback; \
		114	SV *sv1, *sv2; \
		115	SV *sv3, *sv4; \
		116	STRLEN stroffset; \
		117	SV *self;
		118
		119	#define EIO_NO_WRAPPERS 1
		120
		121	#include "libeio/config.h"
		122	#include "libeio/eio.h"
		123
		124	static int req_invoke (eio_req *req);
		125	#define EIO_FINISH(req) req_invoke (req)
		126	static void req_destroy (eio_req *grp);
		127	#define EIO_DESTROY(req) req_destroy (req)
		128
		129	#include "libeio/eio.c"
		130
		131	/* Linux/others */
		132	#ifndef O_ASYNC
		133	# define O_ASYNC 0
		134	#endif
		135	#ifndef O_DIRECT
		136	# define O_DIRECT 0
		137	#endif
		138	#ifndef O_NOATIME
		139	# define O_NOATIME 0
		140	#endif
		141
		142	/* POSIX */
		143	#ifndef O_CLOEXEC
		144	# define O_CLOEXEC 0
		145	#endif
		146	#ifndef O_NOFOLLOW
		147	# define O_NOFOLLOW 0
		148	#endif
		149	#ifndef O_NOCTTY
		150	# define O_NOCTTY 0
		151	#endif
		152	#ifndef O_NONBLOCK
		153	# define O_NONBLOCK 0
		154	#endif
		155	#ifndef O_EXEC
		156	# define O_EXEC 0
		157	#endif
		158	#ifndef O_SEARCH
		159	# define O_SEARCH 0
		160	#endif
		161	#ifndef O_DIRECTORY
		162	# define O_DIRECTORY 0
		163	#endif
		164	#ifndef O_DSYNC
		165	# define O_DSYNC 0
		166	#endif
		167	#ifndef O_RSYNC
		168	# define O_RSYNC 0
		169	#endif
		170	#ifndef O_SYNC
		171	# define O_SYNC 0
		172	#endif
		173	#ifndef O_TTY_INIT
		174	# define O_TTY_INIT 0
		175	#endif
		176
		177	#ifndef POSIX_FADV_NORMAL
		178	# define POSIX_FADV_NORMAL 0
		179	#endif
		180	#ifndef POSIX_FADV_SEQUENTIAL
		181	# define POSIX_FADV_SEQUENTIAL 0
		182	#endif
		183	#ifndef POSIX_FADV_RANDOM
		184	# define POSIX_FADV_RANDOM 0
		185	#endif
		186	#ifndef POSIX_FADV_NOREUSE
		187	# define POSIX_FADV_NOREUSE 0
		188	#endif
		189	#ifndef POSIX_FADV_WILLNEED
		190	# define POSIX_FADV_WILLNEED 0
		191	#endif
		192	#ifndef POSIX_FADV_DONTNEED
		193	# define POSIX_FADV_DONTNEED 0
		194	#endif
		195
		196	#if !HAVE_POSIX_FADVISE
		197	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		198	#endif
		199
		200	#ifndef POSIX_MADV_NORMAL
		201	# define POSIX_MADV_NORMAL 0
		202	#endif
		203	#ifndef POSIX_MADV_SEQUENTIAL
		204	# define POSIX_MADV_SEQUENTIAL 0
		205	#endif
		206	#ifndef POSIX_MADV_RANDOM
		207	# define POSIX_MADV_RANDOM 0
		208	#endif
		209	#ifndef POSIX_MADV_WILLNEED
		210	# define POSIX_MADV_WILLNEED 0
		211	#endif
		212	#ifndef POSIX_MADV_DONTNEED
		213	# define POSIX_MADV_DONTNEED 0
		214	#endif
		215
		216	#if !HAVE_POSIX_MADVISE
		217	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		218	#endif
		219
		220	#ifndef PROT_NONE
		221	# define PROT_NONE 0
		222	#endif
		223	#ifndef PROT_READ
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_WRITE
		227	# define PROT_READ 0
		228	#endif
		229	#ifndef PROT_EXEC
		230	# define PROT_EXEC 0
		231	#endif
		232
		233	#ifndef ST_RDONLY
		234	# define ST_RDONLY 0
		235	#endif
		236	#ifndef ST_NOSUID
		237	# define ST_NOSUID 0
		238	#endif
		239	#ifndef ST_NODEV
		240	# define ST_NODEV 0
		241	#endif
		242	#ifndef ST_NOEXEC
		243	# define ST_NOEXEC 0
		244	#endif
		245	#ifndef ST_SYNCHRONOUS
		246	# define ST_SYNCHRONOUS 0
		247	#endif
		248	#ifndef ST_MANDLOCK
		249	# define ST_MANDLOCK 0
		250	#endif
		251	#ifndef ST_WRITE
		252	# define ST_WRITE 0
		253	#endif
		254	#ifndef ST_APPEND
		255	# define ST_APPEND 0
		256	#endif
		257	#ifndef ST_IMMUTABLE
		258	# define ST_IMMUTABLE 0
		259	#endif
		260	#ifndef ST_NOATIME
		261	# define ST_NOATIME 0
		262	#endif
		263	#ifndef ST_NODIRATIME
		264	# define ST_NODIRATIME 0
		265	#endif
		266	#ifndef ST_RELATIME
		267	# define ST_RELATIME 0
		268	#endif
		269
		270	#ifndef S_IFIFO
		271	# define S_IFIFO 0
		272	#endif
		273	#ifndef S_IFCHR
		274	# define S_IFCHR 0
		275	#endif
		276	#ifndef S_IFBLK
		277	# define S_IFBLK 0
		278	#endif
		279	#ifndef S_IFLNK
		280	# define S_IFLNK 0
		281	#endif
		282	#ifndef S_IFREG
		283	# define S_IFREG 0
		284	#endif
		285	#ifndef S_IFDIR
		286	# define S_IFDIR 0
		287	#endif
		288	#ifndef S_IFWHT
		289	# define S_IFWHT 0
		290	#endif
		291	#ifndef S_IFSOCK
		292	# define S_IFSOCK 0
		293	#endif
		294
		295	#ifndef MAP_ANONYMOUS
		296	# ifdef MAP_ANON
		297	# define MAP_ANONYMOUS MAP_ANON
34	# else	298	# else
35	# error sendfile support requested but not available	299	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	300	# endif
37	#endif	301	#endif
38		302	#ifndef MAP_HUGETLB
39	/* used for struct dirent, AIX doesn't provide it */	303	# define MAP_HUGETLB 0
40	#ifndef NAME_MAX
41	# define NAME_MAX 4096
42	#endif	304	#endif
		305	#ifndef MAP_LOCKED
		306	# define MAP_LOCKED 0
		307	#endif
		308	#ifndef MAP_NORESERVE
		309	# define MAP_NORESERVE 0
		310	#endif
		311	#ifndef MAP_POPULATE
		312	# define MAP_POPULATE 0
		313	#endif
		314	#ifndef MAP_NONBLOCK
		315	# define MAP_NONBLOCK 0
		316	#endif
43		317
44	#if __ia64	318	#ifndef makedev
45	# define STACKSIZE 65536	319	# define makedev(maj,min) (((maj) << 8) | (min))
46	#else	320	#endif
47	# define STACKSIZE 8192	321	#ifndef major
		322	# define major(dev) ((dev) >> 8)
		323	#endif
		324	#ifndef minor
		325	# define minor(dev) ((dev) & 0xff)
		326	#endif
		327
		328	#ifndef PAGESIZE
		329	# define PAGESIZE sysconf (_SC_PAGESIZE)
48	#endif	330	#endif
49		331
50	enum {	332	enum {
51	REQ_QUIT,	333	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	};	334	};
63		335
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;	336	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	337	typedef eio_req *aio_req_ornot;
		338	typedef eio_wd aio_wd;
93		339
94	static int started, wanted;	340	static SV *on_next_submit;
95	static volatile int nreqs;	341	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	342	static int max_outstanding;
97	static int respipe [2];
98		343
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	344	static s_epipe respipe;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		345
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	346	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);	347	static void req_cancel (aio_req req);
107	static void req_free (aio_req req);	348
		349	static void
		350	want_poll (void)
		351	{
		352	/* write a dummy byte to the pipe so fh becomes ready */
		353	s_epipe_signal (&respipe);
		354	}
		355
		356	static void
		357	done_poll (void)
		358	{
		359	/* read any signals sent by the worker threads */
		360	s_epipe_drain (&respipe);
		361	}
108		362
109	/* must be called at most once */	363	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	364	static SV *
		365	req_sv (aio_req req, HV *stash)
111	{	366	{
112	if (!req->self)	367	if (!req->self)
113	{	368	{
114	req->self = (SV *)newHV ();	369	req->self = (SV *)newHV ();
115	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	370	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
116	}	371	}
117		372
118	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	373	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
119	}	374	}
120		375
121	static aio_req SvAIO_REQ (SV *sv)	376	static SV *
		377	newSVaio_wd (aio_wd wd)
		378	{
		379	return sv_bless (newRV_noinc (newSViv ((IV)wd)), aio_wd_stash);
		380	}
		381
		382	static aio_req
		383	SvAIO_REQ (SV *sv)
122	{	384	{
123	MAGIC *mg;	385	MAGIC *mg;
124		386
125	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	387	if (!SvROK (sv)
		388	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		389	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		390	&& SvSTASH (SvRV (sv)) != aio_req_stash
		391	&& !sv_derived_from (sv, "IO::AIO::REQ")))
126	croak ("object of class " AIO_REQ_KLASS " expected");	392	croak ("object of class IO::AIO::REQ expected");
127		393
128	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	394	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
129		395
130	return mg ? (aio_req)mg->mg_ptr : 0;	396	return mg ? (aio_req)mg->mg_ptr : 0;
131	}	397	}
132		398
		399	static aio_wd
		400	SvAIO_WD (SV *sv)
		401	{
		402	if (!SvROK (sv)
		403	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		404	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		405	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		406
		407	return (aio_wd)(long)SvIVX (SvRV (sv));
		408	}
		409
		410	static void
133	static void aio_grp_feed (aio_req grp)	411	aio_grp_feed (aio_req grp)
134	{	412	{
135	while (grp->length < grp->fd2)	413	if (grp->sv2 && SvOK (grp->sv2))
136	{	414	{
137	int old_len = grp->length;	415	dSP;
138		416
139	if (grp->fh2 && SvOK (grp->fh2))	417	ENTER;
		418	SAVETMPS;
		419	PUSHMARK (SP);
		420	XPUSHs (req_sv (grp, aio_grp_stash));
		421	PUTBACK;
		422	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		423	SPAGAIN;
		424	FREETMPS;
		425	LEAVE;
		426	}
		427	}
		428
		429	static void
		430	req_submit (eio_req *req)
		431	{
		432	eio_submit (req);
		433
		434	if (expect_false (on_next_submit))
		435	{
		436	dSP;
		437	SV *cb = sv_2mortal (on_next_submit);
		438
		439	on_next_submit = 0;
		440
		441	PUSHMARK (SP);
		442	PUTBACK;
		443	call_sv (cb, G_DISCARD | G_EVAL);
		444	}
		445	}
		446
		447	static int
		448	req_invoke (eio_req *req)
		449	{
		450	if (req->flags & FLAG_SV2_RO_OFF)
		451	SvREADONLY_off (req->sv2);
		452
		453	if (!EIO_CANCELLED (req) && req->callback)
		454	{
		455	dSP;
		456	static SV *sv_result_cache; /* caches the result integer SV */
		457	SV *sv_result;
		458
		459	ENTER;
		460	SAVETMPS;
		461	PUSHMARK (SP);
		462	EXTEND (SP, 1);
		463
		464	/* do not recreate the result IV from scratch each time */
		465	if (expect_true (sv_result_cache))
140	{	466	{
141	dSP;	467	sv_result = sv_result_cache; sv_result_cache = 0;
142		468	SvIV_set (sv_result, req->result);
143	ENTER;	469	SvIOK_only (sv_result);
144	SAVETMPS;
145	PUSHMARK (SP);
146	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
147	PUTBACK;
148	call_sv (grp->fh2, G_VOID | G_EVAL);
149	SPAGAIN;
150	FREETMPS;
151	LEAVE;
152	}	470	}
153		471	else
154	/* stop if no progress has been made */
155	if (old_len == grp->length)
156	{	472	{
157	SvREFCNT_dec (grp->fh2);	473	sv_result = newSViv (req->result);
158	grp->fh2 = 0;	474	SvREADONLY_on (sv_result);
159	break;
160	}	475	}
		476
		477	switch (req->type)
		478	{
		479	case EIO_WD_OPEN:
		480	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		481	break;
		482
		483	case EIO_READDIR:
		484	{
		485	SV *rv = &PL_sv_undef;
		486
		487	if (req->result >= 0)
		488	{
		489	int i;
		490	char *names = (char *)req->ptr2;
		491	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		492	AV *av = newAV ();
		493
		494	av_extend (av, req->result - 1);
		495
		496	for (i = 0; i < req->result; ++i)
		497	{
		498	if (req->int1 & EIO_READDIR_DENTS)
		499	{
		500	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		501
		502	if (req->int1 & EIO_READDIR_CUSTOM2)
		503	{
		504	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		505	AV *avent = newAV ();
		506
		507	av_extend (avent, 2);
		508
		509	if (!sv_type [ent->type])
		510	{
		511	sv_type [ent->type] = newSViv (ent->type);
		512	SvREADONLY_on (sv_type [ent->type]);
		513	}
		514
		515	av_store (avent, 0, namesv);
		516	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		517	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		518
		519	av_store (av, i, newRV_noinc ((SV *)avent));
		520	}
		521	else
		522	av_store (av, i, namesv);
		523
		524	++ent;
		525	}
		526	else
		527	{
		528	SV *name = newSVpv (names, 0);
		529	av_store (av, i, name);
		530	names += SvCUR (name) + 1;
		531	}
		532	}
		533
		534	rv = sv_2mortal (newRV_noinc ((SV *)av));
		535	}
		536
		537	PUSHs (rv);
		538
		539	if (req->int1 & EIO_READDIR_CUSTOM1)
		540	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		541	}
		542	break;
		543
		544	case EIO_OPEN:
		545	{
		546	/* convert fd to fh */
		547	SV *fh = &PL_sv_undef;
		548
		549	if (req->result >= 0)
		550	{
		551	GV *gv = (GV *)sv_newmortal ();
		552	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		553	char sym [64];
		554	int symlen;
		555
		556	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		557	gv_init (gv, aio_stash, sym, symlen, 0);
		558
		559	symlen = snprintf (
		560	sym,
		561	sizeof (sym),
		562	"%s&=%d",
		563	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		564	(int)req->result
		565	);
		566
		567	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		568	fh = (SV *)gv;
		569	}
		570
		571	PUSHs (fh);
		572	}
		573	break;
		574
		575	case EIO_STATVFS:
		576	case EIO_FSTATVFS:
		577	{
		578	SV *rv = &PL_sv_undef;
		579
		580	#ifndef _WIN32
		581	if (req->result >= 0)
		582	{
		583	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		584	HV *hv = newHV ();
		585
		586	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		587
		588	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		589	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		590	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		591	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		592	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		593	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		594	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		595	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		596	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		597	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		598	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		599	}
		600	#endif
		601
		602	PUSHs (rv);
		603	}
		604
		605	break;
		606
		607	case EIO_GROUP:
		608	req->int1 = 2; /* mark group as finished */
		609
		610	if (req->sv1)
		611	{
		612	int i;
		613	AV *av = (AV *)req->sv1;
		614
		615	EXTEND (SP, AvFILL (av) + 1);
		616	for (i = 0; i <= AvFILL (av); ++i)
		617	PUSHs (*av_fetch (av, i, 0));
		618	}
		619	break;
		620
		621	case EIO_NOP:
		622	case EIO_BUSY:
		623	break;
		624
		625	case EIO_READLINK:
		626	case EIO_REALPATH:
		627	if (req->result > 0)
		628	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		629	break;
		630
		631	case EIO_STAT:
		632	case EIO_LSTAT:
		633	case EIO_FSTAT:
		634	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		635
		636	if (!(PL_laststatval = req->result))
		637	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		638	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		639
		640	PUSHs (sv_result);
		641	break;
		642
		643	case EIO_READ:
		644	{
		645	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		646	*SvEND (req->sv2) = 0;
		647	SvPOK_only (req->sv2);
		648	SvSETMAGIC (req->sv2);
		649	PUSHs (sv_result);
		650	}
		651	break;
		652
		653	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		654	if (req->result > 0)
		655	SvIV_set (sv_result, 0);
		656	/* FALLTHROUGH */
		657
		658	default:
		659	PUSHs (sv_result);
		660	break;
		661	}
		662
		663	errno = req->errorno;
		664
		665	PUTBACK;
		666	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		667	SPAGAIN;
		668
		669	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		670	SvREFCNT_dec (sv_result);
		671	else
		672	sv_result_cache = sv_result;
		673
		674	FREETMPS;
		675	LEAVE;
		676
		677	PUTBACK;
161	}	678	}
162	}
163		679
164	static void aio_grp_dec (aio_req grp)	680	return !!SvTRUE (ERRSV);
165	{
166	--grp->length;
167
168	/* call feeder, if applicable */
169	aio_grp_feed (grp);
170
171	/* finish, if done */
172	if (!grp->length && grp->fd)
173	{
174	req_invoke (grp);
175	req_free (grp);
176	}
177	}	681	}
178		682
179	static void poll_wait ()	683	static void
		684	req_destroy (aio_req req)
180	{	685	{
181	if (nreqs && !ress)
182	{
183	fd_set rfd;
184	FD_ZERO(&rfd);
185	FD_SET(respipe [0], &rfd);
186
187	select (respipe [0] + 1, &rfd, 0, 0, 0);
188	}
189	}
190
191	static void req_invoke (aio_req req)
192	{
193	dSP;
194	int errorno = errno;
195
196	if (req->cancelled || !SvOK (req->callback))
197	return;
198
199	errno = req->errorno;
200
201	ENTER;
202	SAVETMPS;
203	PUSHMARK (SP);
204	EXTEND (SP, 1);
205
206	switch (req->type)
207	{
208	case REQ_READDIR:
209	{
210	SV *rv = &PL_sv_undef;
211
212	if (req->result >= 0)
213	{
214	char *buf = req->data2ptr;
215	AV *av = newAV ();
216
217	while (req->result)
218	{
219	SV *sv = newSVpv (buf, 0);
220
221	av_push (av, sv);
222	buf += SvCUR (sv) + 1;
223	req->result--;
224	}
225
226	rv = sv_2mortal (newRV_noinc ((SV *)av));
227	}
228
229	PUSHs (rv);
230	}
231	break;
232
233	case REQ_OPEN:
234	{
235	/* convert fd to fh */
236	SV *fh;
237
238	PUSHs (sv_2mortal (newSViv (req->result)));
239	PUTBACK;
240	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
241	SPAGAIN;
242
243	fh = SvREFCNT_inc (POPs);
244
245	PUSHMARK (SP);
246	XPUSHs (sv_2mortal (fh));
247	}
248	break;
249
250	case REQ_GROUP:
251	req->fd = 2; /* mark group as finished */
252
253	if (req->data)
254	{
255	int i;
256	AV *av = (AV *)req->data;
257
258	EXTEND (SP, AvFILL (av) + 1);
259	for (i = 0; i <= AvFILL (av); ++i)
260	PUSHs (*av_fetch (av, i, 0));
261	}
262	break;
263
264	case REQ_NOP:
265	case REQ_SLEEP:
266	break;
267
268	default:
269	PUSHs (sv_2mortal (newSViv (req->result)));
270	break;
271	}
272
273
274	PUTBACK;
275	call_sv (req->callback, G_VOID | G_EVAL);
276	SPAGAIN;
277
278	FREETMPS;
279	LEAVE;
280
281	errno = errorno;
282
283	if (SvTRUE (ERRSV))
284	{
285	req_free (req);
286	croak (0);
287	}
288	}
289
290	static void req_free (aio_req req)
291	{
292	if (req->grp)
293	{
294	aio_req grp = req->grp;
295
296	/* unlink request */
297	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
298	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
299
300	if (grp->grp_first == req)
301	grp->grp_first = req->grp_next;
302
303	aio_grp_dec (grp);
304	}
305
306	if (req->self)	686	if (req->self)
307	{	687	{
308	sv_unmagic (req->self, PERL_MAGIC_ext);	688	sv_unmagic (req->self, PERL_MAGIC_ext);
309	SvREFCNT_dec (req->self);	689	SvREFCNT_dec (req->self);
310	}	690	}
311		691
312	SvREFCNT_dec (req->data);
313	SvREFCNT_dec (req->fh);	692	SvREFCNT_dec (req->sv1);
314	SvREFCNT_dec (req->fh2);	693	SvREFCNT_dec (req->sv2);
		694	SvREFCNT_dec (req->sv3);
		695	SvREFCNT_dec (req->sv4);
315	SvREFCNT_dec (req->callback);	696	SvREFCNT_dec (req->callback);
316	Safefree (req->statdata);
317		697
318	if (req->type == REQ_READDIR && req->result >= 0)
319	free (req->data2ptr);
320
321	Safefree (req);	698	free (req);
322	}	699	}
323		700
324	static void req_cancel (aio_req req)	701	static void
		702	req_cancel_subs (aio_req grp)
325	{	703	{
326	req->cancelled = 1;
327
328	if (req->type == REQ_GROUP)	704	if (grp->type != EIO_GROUP)
		705	return;
		706
		707	SvREFCNT_dec (grp->sv2);
		708	grp->sv2 = 0;
		709
		710	eio_grp_cancel (grp);
		711	}
		712
		713	static void ecb_cold
		714	create_respipe (void)
		715	{
		716	if (s_epipe_renew (&respipe))
		717	croak ("IO::AIO: unable to initialize result pipe");
		718	}
		719
		720	static void
		721	poll_wait (void)
		722	{
		723	while (eio_nreqs ())
329	{	724	{
330	aio_req sub;	725	int size;
331		726
332	for (sub = req->grp_first; sub; sub = sub->grp_next)	727	X_LOCK (reslock);
333	req_cancel (sub);	728	size = res_queue.size;
		729	X_UNLOCK (reslock);
		730
		731	if (size)
		732	return;
		733
		734	etp_maybe_start_thread ();
		735
		736	s_epipe_wait (&respipe);
334	}	737	}
335	}	738	}
336		739
337	static int poll_cb ()	740	static int
		741	poll_cb (void)
338	{	742	{
339	dSP;
340	int count = 0;
341	int do_croak = 0;
342	aio_req req;
343
344	for (;;)	743	for (;;)
345	{	744	{
346	pthread_mutex_lock (&reslock);	745	int res = eio_poll ();
347	req = ress;
348		746
349	if (req)	747	if (res > 0)
		748	croak (0);
		749
		750	if (!max_outstanding || max_outstanding > eio_nreqs ())
		751	return res;
		752
		753	poll_wait ();
		754	}
		755	}
		756
		757	static void ecb_cold
		758	reinit (void)
		759	{
		760	create_respipe ();
		761
		762	if (eio_init (want_poll, done_poll) < 0)
		763	croak ("IO::AIO: unable to initialise eio library");
		764	}
		765
		766	/*****************************************************************************/
		767
		768	#if !_POSIX_MAPPED_FILES
		769	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		770	# define munmap(addr,length) (errno = ENOSYS, -1)
		771	#endif
		772
		773	#if !_POSIX_MEMORY_PROTECTION
		774	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		775	# define PROT_NONE 0
		776	# define PROT_WRITE 0
		777	# define MAP_PRIVATE 0
		778	# define MAP_SHARED 0
		779	# define MAP_FIXED 0
		780	#endif
		781
		782	#define MMAP_MAGIC PERL_MAGIC_ext
		783
		784	static int ecb_cold
		785	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		786	{
		787	int old_errno = errno;
		788	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		789	errno = old_errno;
		790
		791	mg->mg_obj = 0; /* just in case */
		792
		793	SvREADONLY_off (sv);
		794
		795	if (SvPVX (sv) != mg->mg_ptr)
		796	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		797
		798	SvCUR_set (sv, 0);
		799	SvPVX (sv) = 0;
		800	SvOK_off (sv);
		801
		802	return 0;
		803	}
		804
		805	static MGVTBL mmap_vtbl = {
		806	0, 0, 0, 0, mmap_free
		807	};
		808
		809	/*****************************************************************************/
		810
		811	static SV *
		812	get_cb (SV *cb_sv)
		813	{
		814	SvGETMAGIC (cb_sv);
		815	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		816	}
		817
		818	static aio_req ecb_noinline
		819	dreq (SV *callback)
		820	{
		821	SV *cb_cv;
		822	aio_req req;
		823	int req_pri = next_pri;
		824	next_pri = EIO_PRI_DEFAULT;
		825
		826	cb_cv = get_cb (callback);
		827
		828	req = calloc (sizeof (*req), 1);
		829	if (!req)
		830	croak ("out of memory during eio_req allocation");
		831
		832	req->callback = SvREFCNT_inc (cb_cv);
		833	req->pri = req_pri;
		834
		835	return req;
		836	}
		837
		838	#define dREQ \
		839	aio_req req = dreq (callback); \
		840
		841	#define REQ_SEND \
		842	PUTBACK; \
		843	req_submit (req); \
		844	SPAGAIN; \
		845	\
		846	if (GIMME_V != G_VOID) \
		847	XPUSHs (req_sv (req, aio_req_stash));
		848
		849	ecb_inline void
		850	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		851	{
		852	if (expect_false (SvROK (path)))
		853	{
		854	SV *rv = SvRV (path);
		855	SV *wdob;
		856
		857	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
350	{	858	{
351	ress = req->next;	859	path = AvARRAY (rv)[1];
		860	wdob = AvARRAY (rv)[0];
352		861
353	if (!ress)	862	if (SvOK (wdob))
354	{	863	{
355	/* read any signals sent by the worker threads */	864	*wd = SvAIO_WD (wdob);
356	char buf [32];	865	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
357	while (read (respipe [0], buf, 32) == 32)
358	;
359
360	rese = 0;
361	}	866	}
		867	else
		868	*wd = EIO_INVALID_WD;
362	}	869	}
363		870	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
364	pthread_mutex_unlock (&reslock);
365
366	if (!req)
367	break;
368
369	--nreqs;
370
371	if (req->type == REQ_QUIT)
372	started--;
373	else if (req->type == REQ_GROUP && req->length)
374	{	871	{
375	req->fd = 1; /* mark request as delayed */	872	*wd = (aio_wd)(long)SvIVX (rv);
376	continue;	873	*wdsv = SvREFCNT_inc_NN (rv);
		874	*ptr = ".";
		875	return; /* path set to "." */
377	}	876	}
378	else	877	else
379	{	878	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
380	if (req->type == REQ_READ)
381	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
382
383	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
384	SvREADONLY_off (req->data);
385
386	if (req->statdata)
387	{
388	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
389	PL_laststatval = req->result;
390	PL_statcache = *(req->statdata);
391	}
392
393	req_invoke (req);
394
395	count++;
396	}
397
398	req_free (req);
399	}	879	}
400		880
401	return count;	881	*pathsv = newSVsv (path);
		882	*ptr = SvPVbyte_nolen (*pathsv);
402	}	883	}
403		884
404	static void *aio_proc(void *arg);	885	static void ecb_noinline
405		886	req_set_path1 (aio_req req, SV *path)
406	static void start_thread (void)
407	{	887	{
408	sigset_t fullsigset, oldsigset;	888	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
409	pthread_t tid;
410	pthread_attr_t attr;
411
412	pthread_attr_init (&attr);
413	pthread_attr_setstacksize (&attr, STACKSIZE);
414	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
415
416	sigfillset (&fullsigset);
417	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
418
419	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
420	started++;
421
422	sigprocmask (SIG_SETMASK, &oldsigset, 0);
423	}	889	}
424		890
425	static void req_send (aio_req req)	891	static void ecb_noinline
		892	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
426	{	893	{
427	while (started < wanted && nreqs >= started)	894	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
428	start_thread ();
429		895
430	++nreqs;	896	switch (SvTYPE (rv))
431
432	pthread_mutex_lock (&reqlock);
433
434	req->next = 0;
435
436	if (reqe)
437	{	897	{
438	reqe->next = req;	898	case SVt_PVIO:
439	reqe = req;	899	case SVt_PVLV:
		900	case SVt_PVGV:
		901	req->type = type_fh;
		902	req->sv1 = newSVsv (fh_or_path);
		903	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		904	break;
		905
		906	default:
		907	req->type = type_path;
		908	req_set_path1 (req, fh_or_path);
		909	break;
440	}	910	}
441	else
442	reqe = reqs = req;
443
444	pthread_cond_signal (&reqwait);
445	pthread_mutex_unlock (&reqlock);
446
447	if (nreqs > max_outstanding)
448	for (;;)
449	{
450	poll_cb ();
451
452	if (nreqs <= max_outstanding)
453	break;
454
455	poll_wait ();
456	}
457	}	911	}
458		912
459	static void end_thread (void)	913	XS(boot_IO__AIO) ecb_cold;
460	{
461	aio_req req;
462	Newz (0, req, 1, aio_cb);
463	req->type = REQ_QUIT;
464		914
465	req_send (req);	915	MODULE = IO::AIO PACKAGE = IO::AIO
466	}
467		916
468	static void min_parallel (int nthreads)	917	PROTOTYPES: ENABLE
469	{
470	if (wanted < nthreads)
471	wanted = nthreads;
472	}
473		918
474	static void max_parallel (int nthreads)	919	BOOT:
475	{	920	{
476	int cur = started;	921	static const struct {
		922	const char *name;
		923	IV iv;
		924	} *civ, const_iv[] = {
		925	# define const_niv(name, value) { # name, (IV) value },
		926	# define const_iv(name) { # name, (IV) name },
		927	# define const_eio(name) { # name, (IV) EIO_ ## name },
		928	const_iv (EXDEV)
		929	const_iv (ENOSYS)
		930	const_iv (O_RDONLY)
		931	const_iv (O_WRONLY)
		932	const_iv (O_RDWR)
		933	const_iv (O_CREAT)
		934	const_iv (O_TRUNC)
		935	const_iv (O_EXCL)
		936	const_iv (O_APPEND)
477		937
478	if (wanted > nthreads)	938	const_iv (O_ASYNC)
479	wanted = nthreads;	939	const_iv (O_DIRECT)
		940	const_iv (O_NOATIME)
480		941
481	while (cur > wanted)	942	const_iv (O_CLOEXEC)
482	{	943	const_iv (O_NOCTTY)
483	end_thread ();	944	const_iv (O_NOFOLLOW)
484	cur--;	945	const_iv (O_NONBLOCK)
485	}	946	const_iv (O_EXEC)
		947	const_iv (O_SEARCH)
		948	const_iv (O_DIRECTORY)
		949	const_iv (O_DSYNC)
		950	const_iv (O_RSYNC)
		951	const_iv (O_SYNC)
		952	const_iv (O_TTY_INIT)
486		953
487	while (started > wanted)	954	const_iv (S_IFIFO)
488	{	955	const_iv (S_IFCHR)
489	poll_wait ();	956	const_iv (S_IFBLK)
490	poll_cb ();	957	const_iv (S_IFLNK)
491	}	958	const_iv (S_IFREG)
492	}	959	const_iv (S_IFDIR)
		960	const_iv (S_IFWHT)
		961	const_iv (S_IFSOCK)
		962	const_iv (S_IFMT)
493		963
494	static void create_pipe ()	964	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
495	{	965	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
496	if (pipe (respipe))	966	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
497	croak ("unable to initialize result pipe");	967	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		968	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		969	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
498		970
499	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	971	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
500	croak ("cannot set result pipe to nonblocking mode");	972	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		973	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		974	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		975	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
501		976
502	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	977	const_iv (ST_RDONLY)
503	croak ("cannot set result pipe to nonblocking mode");	978	const_iv (ST_NOSUID)
504	}	979	const_iv (ST_NODEV)
		980	const_iv (ST_NOEXEC)
		981	const_iv (ST_SYNCHRONOUS)
		982	const_iv (ST_MANDLOCK)
		983	const_iv (ST_WRITE)
		984	const_iv (ST_APPEND)
		985	const_iv (ST_IMMUTABLE)
		986	const_iv (ST_NOATIME)
		987	const_iv (ST_NODIRATIME)
		988	const_iv (ST_RELATIME)
505		989
506	/*****************************************************************************/	990	const_iv (PROT_NONE)
507	/* work around various missing functions */	991	const_iv (PROT_EXEC)
		992	const_iv (PROT_READ)
		993	const_iv (PROT_WRITE)
508		994
509	#if !HAVE_PREADWRITE	995	/*const_iv (MAP_FIXED)*/
510	# define pread aio_pread	996	const_iv (MAP_PRIVATE)
511	# define pwrite aio_pwrite	997	const_iv (MAP_SHARED)
		998	const_iv (MAP_ANONYMOUS)
512		999
513	/*	1000	/* linuxish */
514	* make our pread/pwrite safe against themselves, but not against	1001	const_iv (MAP_HUGETLB)
515	* normal read/write by using a mutex. slows down execution a lot,	1002	const_iv (MAP_LOCKED)
516	* but that's your problem, not mine.	1003	const_iv (MAP_NORESERVE)
517	*/	1004	const_iv (MAP_POPULATE)
518	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	1005	const_iv (MAP_NONBLOCK)
519		1006
520	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	1007	const_eio (MCL_FUTURE)
521	{	1008	const_eio (MCL_CURRENT)
522	ssize_t res;
523	off_t ooffset;
524		1009
525	pthread_mutex_lock (&preadwritelock);	1010	const_eio (MS_ASYNC)
526	ooffset = lseek (fd, 0, SEEK_CUR);	1011	const_eio (MS_INVALIDATE)
527	lseek (fd, offset, SEEK_SET);	1012	const_eio (MS_SYNC)
528	res = read (fd, buf, count);
529	lseek (fd, ooffset, SEEK_SET);
530	pthread_mutex_unlock (&preadwritelock);
531		1013
532	return res;	1014	const_eio (MT_MODIFY)
533	}
534		1015
535	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1016	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
536	{	1017	const_eio (SYNC_FILE_RANGE_WRITE)
537	ssize_t res;	1018	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
538	off_t ooffset;
539		1019
540	pthread_mutex_lock (&preadwritelock);	1020	const_eio (FALLOC_FL_KEEP_SIZE)
541	ooffset = lseek (fd, 0, SEEK_CUR);
542	lseek (fd, offset, SEEK_SET);
543	res = write (fd, buf, count);
544	lseek (fd, offset, SEEK_SET);
545	pthread_mutex_unlock (&preadwritelock);
546		1021
547	return res;	1022	const_eio (READDIR_DENTS)
548	}	1023	const_eio (READDIR_DIRS_FIRST)
549	#endif	1024	const_eio (READDIR_STAT_ORDER)
		1025	const_eio (READDIR_FOUND_UNKNOWN)
550		1026
551	#if !HAVE_FDATASYNC	1027	const_eio (DT_UNKNOWN)
552	# define fdatasync fsync	1028	const_eio (DT_FIFO)
553	#endif	1029	const_eio (DT_CHR)
554		1030	const_eio (DT_DIR)
555	#if !HAVE_READAHEAD	1031	const_eio (DT_BLK)
556	# define readahead aio_readahead	1032	const_eio (DT_REG)
557		1033	const_eio (DT_LNK)
558	static ssize_t readahead (int fd, off_t offset, size_t count)	1034	const_eio (DT_SOCK)
559	{	1035	const_eio (DT_WHT)
560	char readahead_buf[4096];
561
562	while (count > 0)
563	{
564	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
565
566	pread (fd, readahead_buf, len, offset);
567	offset += len;
568	count -= len;
569	}
570
571	errno = 0;
572	}
573	#endif
574
575	#if !HAVE_READDIR_R
576	# define readdir_r aio_readdir_r
577
578	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
579
580	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
581	{
582	struct dirent *e;
583	int errorno;
584
585	pthread_mutex_lock (&readdirlock);
586
587	e = readdir (dirp);
588	errorno = errno;
589
590	if (e)
591	{
592	*res = ent;
593	strcpy (ent->d_name, e->d_name);
594	}
595	else
596	*res = 0;
597
598	pthread_mutex_unlock (&readdirlock);
599
600	errno = errorno;
601	return e ? 0 : -1;
602	}
603	#endif
604
605	/* sendfile always needs emulation */
606	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
607	{
608	ssize_t res;
609
610	if (!count)
611	return 0;
612
613	#if HAVE_SENDFILE
614	# if __linux
615	res = sendfile (ofd, ifd, &offset, count);
616
617	# elif __freebsd
618	/*
619	* Of course, the freebsd sendfile is a dire hack with no thoughts
620	* wasted on making it similar to other I/O functions.
621	*/
622	{
623	off_t sbytes;
624	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
625
626	if (res < 0 && sbytes)
627	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
628	res = sbytes;
629	}	1036	};
630		1037
631	# elif __hpux	1038	aio_stash = gv_stashpv ("IO::AIO" , 1);
632	res = sendfile (ofd, ifd, offset, count, 0, 0);	1039	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1040	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1041	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
633		1042
634	# elif __solaris	1043	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
635	{	1044	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
636	struct sendfilevec vec;
637	size_t sbytes;
638		1045
639	vec.sfv_fd = ifd;	1046	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
640	vec.sfv_flag = 0;
641	vec.sfv_off = offset;
642	vec.sfv_len = count;
643		1047
644	res = sendfilev (ofd, &vec, 1, &sbytes);	1048	reinit ();
		1049	}
645		1050
646	if (res < 0 && sbytes)	1051	void
		1052	reinit ()
		1053	PROTOTYPE:
		1054
		1055	void
		1056	max_poll_reqs (unsigned int nreqs)
		1057	PROTOTYPE: $
		1058	CODE:
		1059	eio_set_max_poll_reqs (nreqs);
		1060
		1061	void
		1062	max_poll_time (double nseconds)
		1063	PROTOTYPE: $
		1064	CODE:
		1065	eio_set_max_poll_time (nseconds);
		1066
		1067	void
		1068	min_parallel (unsigned int nthreads)
		1069	PROTOTYPE: $
		1070	CODE:
		1071	eio_set_min_parallel (nthreads);
		1072
		1073	void
		1074	max_parallel (unsigned int nthreads)
		1075	PROTOTYPE: $
		1076	CODE:
		1077	eio_set_max_parallel (nthreads);
		1078
		1079	void
		1080	max_idle (unsigned int nthreads)
		1081	PROTOTYPE: $
		1082	CODE:
		1083	eio_set_max_idle (nthreads);
		1084
		1085	void
		1086	idle_timeout (unsigned int seconds)
		1087	PROTOTYPE: $
		1088	CODE:
		1089	eio_set_idle_timeout (seconds);
		1090
		1091	void
		1092	max_outstanding (unsigned int maxreqs)
		1093	PROTOTYPE: $
		1094	CODE:
		1095	max_outstanding = maxreqs;
		1096
		1097	void
		1098	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1099	PPCODE:
		1100	{
		1101	dREQ;
		1102
		1103	req->type = EIO_WD_OPEN;
		1104	req_set_path1 (req, pathname);
		1105
		1106	REQ_SEND;
		1107	}
		1108
		1109	void
		1110	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1111	PPCODE:
		1112	{
		1113	dREQ;
		1114
		1115	req->type = EIO_OPEN;
		1116	req_set_path1 (req, pathname);
		1117	req->int1 = flags;
		1118	req->int2 = mode;
		1119
		1120	REQ_SEND;
		1121	}
		1122
		1123	void
		1124	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1125	ALIAS:
		1126	aio_fsync = EIO_FSYNC
		1127	aio_fdatasync = EIO_FDATASYNC
		1128	aio_syncfs = EIO_SYNCFS
		1129	PPCODE:
		1130	{
		1131	int fd = s_fileno_croak (fh, 0);
		1132	dREQ;
		1133
		1134	req->type = ix;
		1135	req->sv1 = newSVsv (fh);
		1136	req->int1 = fd;
		1137
		1138	REQ_SEND (req);
		1139	}
		1140
		1141	void
		1142	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1143	PPCODE:
		1144	{
		1145	int fd = s_fileno_croak (fh, 0);
		1146	dREQ;
		1147
		1148	req->type = EIO_SYNC_FILE_RANGE;
		1149	req->sv1 = newSVsv (fh);
		1150	req->int1 = fd;
		1151	req->offs = offset;
647	res = sbytes;	1152	req->size = nbytes;
648	}	1153	req->int2 = flags;
649		1154
650	# endif	1155	REQ_SEND (req);
		1156	}
		1157
		1158	void
		1159	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1160	PPCODE:
		1161	{
		1162	int fd = s_fileno_croak (fh, 0);
		1163	dREQ;
		1164
		1165	req->type = EIO_FALLOCATE;
		1166	req->sv1 = newSVsv (fh);
		1167	req->int1 = fd;
		1168	req->int2 = mode;
		1169	req->offs = offset;
		1170	req->size = len;
		1171
		1172	REQ_SEND (req);
		1173	}
		1174
		1175	void
		1176	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1177	PPCODE:
		1178	{
		1179	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1180	int fd = s_fileno_croak (fh, 0);
		1181	dREQ;
		1182
		1183	if (expect_false (close_fd < 0))
		1184	{
		1185	int pipefd [2];
		1186
		1187	if (
		1188	#ifdef _WIN32
		1189	_pipe (pipefd, 1, _O_BINARY) < 0
651	#else	1190	#else
652	res = -1;	1191	pipe (pipefd) < 0
653	errno = ENOSYS;	1192	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
654	#endif	1193	#endif
655		1194	|| close (pipefd [1]) < 0
656	if (res < 0
657	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
658	#if __solaris
659	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
660	#endif
661	)
662	)
663	{
664	/* emulate sendfile. this is a major pain in the ass */
665	char buf[4096];
666	res = 0;
667
668	while (count)
669	{
670	ssize_t cnt;
671
672	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
673
674	if (cnt <= 0)
675	{	1195	)
676	if (cnt && !res) res = -1;	1196	abort (); /*D*/
677	break;
678	}
679		1197
680	cnt = write (ofd, buf, cnt);	1198	close_fd = pipefd [0];
681
682	if (cnt <= 0)
683	{
684	if (cnt && !res) res = -1;
685	break;
686	}
687
688	offset += cnt;
689	res += cnt;
690	count -= cnt;
691	}
692	}
693
694	return res;
695	}
696
697	/* read a full directory */
698	static int scandir_ (const char *path, void **namesp)
699	{
700	DIR *dirp = opendir (path);
701	union
702	{
703	struct dirent d;
704	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
705	} u;
706	struct dirent *entp;
707	char *name, *names;
708	int memlen = 4096;
709	int memofs = 0;
710	int res = 0;
711	int errorno;
712
713	if (!dirp)
714	return -1;
715
716	names = malloc (memlen);
717
718	for (;;)
719	{
720	errno = 0, readdir_r (dirp, &u.d, &entp);
721
722	if (!entp)
723	break;
724
725	name = entp->d_name;
726
727	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
728	{
729	int len = strlen (name) + 1;
730
731	res++;
732
733	while (memofs + len > memlen)
734	{
735	memlen *= 2;
736	names = realloc (names, memlen);
737	if (!names)
738	break;
739	}
740
741	memcpy (names + memofs, name, len);
742	memofs += len;
743	}
744	}
745
746	errorno = errno;
747	closedir (dirp);
748
749	if (errorno)
750	{
751	free (names);
752	errno = errorno;
753	res = -1;
754	}
755
756	*namesp = (void *)names;
757	return res;
758	}
759
760	/*****************************************************************************/
761
762	static void *aio_proc (void *thr_arg)
763	{
764	aio_req req;
765	int type;
766
767	do
768	{
769	pthread_mutex_lock (&reqlock);
770
771	for (;;)
772	{
773	req = reqs;
774
775	if (reqs)
776	{
777	reqs = reqs->next;
778	if (!reqs) reqe = 0;
779	}
780
781	if (req)
782	break;
783
784	pthread_cond_wait (&reqwait, &reqlock);
785	}
786
787	pthread_mutex_unlock (&reqlock);
788
789	errno = 0; /* strictly unnecessary */
790
791	if (!req->cancelled)
792	switch (type = req->type) /* remember type for QUIT check */
793	{
794	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
795	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
796
797	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
798	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
799
800	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
801	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
802	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
803
804	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
805	case REQ_CLOSE: req->result = close (req->fd); break;
806	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
807	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
808	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
809	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
810	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
811
812	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
813	case REQ_FSYNC: req->result = fsync (req->fd); break;
814	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
815
816	case REQ_SLEEP:
817	{
818	struct timeval tv;
819
820	tv.tv_sec = req->fd;
821	tv.tv_usec = req->fd2;
822
823	req->result = select (0, 0, 0, 0, &tv);
824	}
825
826	case REQ_GROUP: /*TODO: should not be handled here */
827	case REQ_NOP: /*TODO: should not be handled here */
828	case REQ_QUIT:
829	break;
830
831	default:
832	req->result = ENOSYS;
833	break;
834	}	1199	}
835		1200
836	req->errorno = errno;
837
838	pthread_mutex_lock (&reslock);
839
840	req->next = 0;
841
842	if (rese)
843	{
844	rese->next = req;
845	rese = req;
846	}
847	else
848	{
849	rese = ress = req;
850
851	/* write a dummy byte to the pipe so fh becomes ready */
852	write (respipe [1], &respipe, 1);
853	}
854
855	pthread_mutex_unlock (&reslock);
856	}
857	while (type != REQ_QUIT);
858
859	return 0;
860	}
861
862	/*****************************************************************************/
863
864	static void atfork_prepare (void)
865	{
866	pthread_mutex_lock (&reqlock);
867	pthread_mutex_lock (&reslock);
868	#if !HAVE_PREADWRITE
869	pthread_mutex_lock (&preadwritelock);
870	#endif
871	#if !HAVE_READDIR_R
872	pthread_mutex_lock (&readdirlock);
873	#endif
874	}
875
876	static void atfork_parent (void)
877	{
878	#if !HAVE_READDIR_R
879	pthread_mutex_unlock (&readdirlock);
880	#endif
881	#if !HAVE_PREADWRITE
882	pthread_mutex_unlock (&preadwritelock);
883	#endif
884	pthread_mutex_unlock (&reslock);
885	pthread_mutex_unlock (&reqlock);
886	}
887
888	static void atfork_child (void)
889	{
890	aio_req prv;
891
892	started = 0;
893
894	while (reqs)
895	{
896	prv = reqs;
897	reqs = prv->next;
898	req_free (prv);
899	}
900
901	reqs = reqe = 0;
902
903	while (ress)
904	{
905	prv = ress;
906	ress = prv->next;
907	req_free (prv);
908	}
909
910	ress = rese = 0;
911
912	close (respipe [0]);
913	close (respipe [1]);
914	create_pipe ();
915
916	atfork_parent ();
917	}
918
919	#define dREQ \
920	aio_req req; \
921	\
922	if (SvOK (callback) && !SvROK (callback)) \
923	croak ("callback must be undef or of reference type"); \
924	\
925	Newz (0, req, 1, aio_cb); \
926	if (!req) \
927	croak ("out of memory during aio_req allocation"); \
928	\
929	req->callback = newSVsv (callback)
930
931	#define REQ_SEND \
932	req_send (req); \
933	\
934	if (GIMME_V != G_VOID) \
935	XPUSHs (req_sv (req, AIO_REQ_KLASS));
936
937	MODULE = IO::AIO PACKAGE = IO::AIO
938
939	PROTOTYPES: ENABLE
940
941	BOOT:
942	{
943	HV *stash = gv_stashpv ("IO::AIO", 1);
944	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
945	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
946	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
947
948	create_pipe ();
949	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
950	}
951
952	void
953	min_parallel (nthreads)
954	int nthreads
955	PROTOTYPE: $
956
957	void
958	max_parallel (nthreads)
959	int nthreads
960	PROTOTYPE: $
961
962	int
963	max_outstanding (nreqs)
964	int nreqs
965	PROTOTYPE: $
966	CODE:
967	RETVAL = max_outstanding;
968	max_outstanding = nreqs;
969
970	void
971	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
972	SV * pathname
973	int flags
974	int mode
975	SV * callback
976	PROTOTYPE: $$$;$
977	PPCODE:
978	{
979	dREQ;
980
981	req->type = REQ_OPEN;	1201	req->type = EIO_DUP2;
		1202	req->int1 = close_fd;
982	req->data = newSVsv (pathname);	1203	req->sv2 = newSVsv (fh);
983	req->dataptr = SvPVbyte_nolen (req->data);	1204	req->int2 = fd;
984	req->fd = flags;
985	req->mode = mode;
986		1205
987	REQ_SEND;	1206	REQ_SEND (req);
988	}	1207	}
989		1208
990	void	1209	void
991	aio_close (fh,callback=&PL_sv_undef)	1210	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
992	SV * fh
993	SV * callback
994	PROTOTYPE: $;$
995	ALIAS:	1211	ALIAS:
996	aio_close = REQ_CLOSE
997	aio_fsync = REQ_FSYNC
998	aio_fdatasync = REQ_FDATASYNC
999	PPCODE:
1000	{
1001	dREQ;
1002
1003	req->type = ix;
1004	req->fh = newSVsv (fh);
1005	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1006
1007	REQ_SEND (req);
1008	}
1009
1010	void
1011	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1012	SV * fh
1013	UV offset
1014	UV length
1015	SV * data
1016	UV dataoffset
1017	SV * callback
1018	ALIAS:
1019	aio_read = REQ_READ	1212	aio_read = EIO_READ
1020	aio_write = REQ_WRITE	1213	aio_write = EIO_WRITE
1021	PROTOTYPE: $$$$$;$
1022	PPCODE:	1214	PPCODE:
1023	{	1215	{
1024	aio_req req;
1025	STRLEN svlen;	1216	STRLEN svlen;
		1217	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1026	char *svptr = SvPVbyte (data, svlen);	1218	char *svptr = SvPVbyte (data, svlen);
1027		1219	UV len = SvUV (length);
1028	SvUPGRADE (data, SVt_PV);
1029	SvPOK_on (data);
1030		1220
1031	if (dataoffset < 0)	1221	if (dataoffset < 0)
1032	dataoffset += svlen;	1222	dataoffset += svlen;
1033		1223
1034	if (dataoffset < 0 || dataoffset > svlen)	1224	if (dataoffset < 0 || dataoffset > svlen)
1035	croak ("data offset outside of string");	1225	croak ("dataoffset outside of data scalar");
1036		1226
1037	if (ix == REQ_WRITE)	1227	if (ix == EIO_WRITE)
1038	{	1228	{
1039	/* write: check length and adjust. */	1229	/* write: check length and adjust. */
1040	if (length < 0 || length + dataoffset > svlen)	1230	if (!SvOK (length) || len + dataoffset > svlen)
1041	length = svlen - dataoffset;	1231	len = svlen - dataoffset;
1042	}	1232	}
1043	else	1233	else
1044	{	1234	{
1045	/* read: grow scalar as necessary */	1235	/* read: check type and grow scalar as necessary */
		1236	SvUPGRADE (data, SVt_PV);
1046	svptr = SvGROW (data, length + dataoffset);	1237	svptr = SvGROW (data, len + dataoffset + 1);
1047	}	1238	}
1048
1049	if (length < 0)
1050	croak ("length must not be negative");
1051		1239
1052	{	1240	{
1053	dREQ;	1241	dREQ;
1054		1242
1055	req->type = ix;	1243	req->type = ix;
1056	req->fh = newSVsv (fh);	1244	req->sv1 = newSVsv (fh);
1057	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1245	req->int1 = fd;
1058	: IoOFP (sv_2io (fh)));	1246	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1059	req->offset = offset;	1247	req->size = len;
1060	req->length = length;
1061	req->data = SvREFCNT_inc (data);	1248	req->sv2 = SvREFCNT_inc (data);
1062	req->dataptr = (char *)svptr + dataoffset;	1249	req->ptr2 = (char *)svptr + dataoffset;
		1250	req->stroffset = dataoffset;
1063		1251
1064	if (!SvREADONLY (data))	1252	if (!SvREADONLY (data))
1065	{	1253	{
1066	SvREADONLY_on (data);	1254	SvREADONLY_on (data);
1067	req->data2ptr = (void *)data;	1255	req->flags |= FLAG_SV2_RO_OFF;
1068	}	1256	}
1069		1257
1070	REQ_SEND;	1258	REQ_SEND;
1071	}	1259	}
1072	}	1260	}
1073		1261
1074	void	1262	void
1075	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1263	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1076	SV * out_fh	1264	ALIAS:
1077	SV * in_fh	1265	aio_readlink = EIO_READLINK
1078	UV in_offset	1266	aio_realpath = EIO_REALPATH
1079	UV length
1080	SV * callback
1081	PROTOTYPE: $$$$;$
1082	PPCODE:	1267	PPCODE:
1083	{	1268	{
		1269	dREQ;
		1270
		1271	req->type = ix;
		1272	req_set_path1 (req, pathname);
		1273
		1274	REQ_SEND;
		1275	}
		1276
		1277	void
		1278	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1279	PPCODE:
		1280	{
		1281	int ifd = s_fileno_croak (in_fh , 0);
		1282	int ofd = s_fileno_croak (out_fh, 1);
1084	dREQ;	1283	dREQ;
1085		1284
1086	req->type = REQ_SENDFILE;	1285	req->type = EIO_SENDFILE;
1087	req->fh = newSVsv (out_fh);	1286	req->sv1 = newSVsv (out_fh);
1088	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1287	req->int1 = ofd;
1089	req->fh2 = newSVsv (in_fh);	1288	req->sv2 = newSVsv (in_fh);
1090	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1289	req->int2 = ifd;
1091	req->offset = in_offset;	1290	req->offs = in_offset;
1092	req->length = length;	1291	req->size = length;
1093		1292
1094	REQ_SEND;	1293	REQ_SEND;
1095	}	1294	}
1096		1295
1097	void	1296	void
1098	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1297	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1099	SV * fh
1100	UV offset
1101	IV length
1102	SV * callback
1103	PROTOTYPE: $$$;$
1104	PPCODE:	1298	PPCODE:
1105	{	1299	{
		1300	int fd = s_fileno_croak (fh, 0);
1106	dREQ;	1301	dREQ;
1107		1302
1108	req->type = REQ_READAHEAD;	1303	req->type = EIO_READAHEAD;
1109	req->fh = newSVsv (fh);	1304	req->sv1 = newSVsv (fh);
1110	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1305	req->int1 = fd;
1111	req->offset = offset;	1306	req->offs = offset;
1112	req->length = length;	1307	req->size = length;
1113		1308
1114	REQ_SEND;	1309	REQ_SEND;
1115	}	1310	}
1116		1311
1117	void	1312	void
1118	aio_stat (fh_or_path,callback=&PL_sv_undef)	1313	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1119	SV * fh_or_path
1120	SV * callback
1121	ALIAS:	1314	ALIAS:
1122	aio_stat = REQ_STAT	1315	aio_stat = EIO_STAT
1123	aio_lstat = REQ_LSTAT	1316	aio_lstat = EIO_LSTAT
		1317	aio_statvfs = EIO_STATVFS
1124	PPCODE:	1318	PPCODE:
1125	{	1319	{
1126	dREQ;	1320	dREQ;
1127		1321
1128	New (0, req->statdata, 1, Stat_t);	1322	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1129	if (!req->statdata)
1130	{
1131	req_free (req);
1132	croak ("out of memory during aio_req->statdata allocation");
1133	}
1134
1135	if (SvPOK (fh_or_path))
1136	{
1137	req->type = ix;
1138	req->data = newSVsv (fh_or_path);
1139	req->dataptr = SvPVbyte_nolen (req->data);
1140	}
1141	else
1142	{
1143	req->type = REQ_FSTAT;
1144	req->fh = newSVsv (fh_or_path);
1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1146	}
1147		1323
1148	REQ_SEND;	1324	REQ_SEND;
1149	}	1325	}
1150		1326
		1327	UV
		1328	major (UV dev)
		1329	ALIAS:
		1330	minor = 1
		1331	CODE:
		1332	RETVAL = ix ? major (dev) : minor (dev);
		1333	OUTPUT:
		1334	RETVAL
		1335
		1336	UV
		1337	makedev (UV maj, UV min)
		1338	CODE:
		1339	RETVAL = makedev (maj, min);
		1340	OUTPUT:
		1341	RETVAL
		1342
1151	void	1343	void
		1344	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1345	PPCODE:
		1346	{
		1347	dREQ;
		1348
		1349	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1350	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1351	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1352
		1353	REQ_SEND;
		1354	}
		1355
		1356	void
		1357	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1358	PPCODE:
		1359	{
		1360	dREQ;
		1361
		1362	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1363	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1364
		1365	REQ_SEND;
		1366	}
		1367
		1368	void
		1369	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1370	PPCODE:
		1371	{
		1372	dREQ;
		1373
		1374	req->int2 = mode;
		1375	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1376
		1377	REQ_SEND;
		1378	}
		1379
		1380	void
		1381	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1382	PPCODE:
		1383	{
		1384	dREQ;
		1385
		1386	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1387	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1388	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1389
		1390	REQ_SEND;
		1391	}
		1392
		1393	void
		1394	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1395	PPCODE:
		1396	{
		1397	dREQ;
		1398
		1399	req->type = EIO_READDIR;
		1400	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1401
		1402	if (flags & EIO_READDIR_DENTS)
		1403	req->int1 |= EIO_READDIR_CUSTOM2;
		1404
		1405	req_set_path1 (req, pathname);
		1406
		1407	REQ_SEND;
		1408	}
		1409
		1410	void
		1411	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1412	PPCODE:
		1413	{
		1414	dREQ;
		1415
		1416	req->type = EIO_MKDIR;
		1417	req->int2 = mode;
		1418	req_set_path1 (req, pathname);
		1419
		1420	REQ_SEND;
		1421	}
		1422
		1423	void
1152	aio_unlink (pathname,callback=&PL_sv_undef)	1424	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1153	SV * pathname
1154	SV * callback
1155	ALIAS:	1425	ALIAS:
1156	aio_unlink = REQ_UNLINK	1426	aio_unlink = EIO_UNLINK
1157	aio_rmdir = REQ_RMDIR	1427	aio_rmdir = EIO_RMDIR
1158	aio_readdir = REQ_READDIR	1428	aio_readdir = EIO_READDIR
1159	PPCODE:	1429	PPCODE:
1160	{	1430	{
1161	dREQ;	1431	dREQ;
1162		1432
1163	req->type = ix;	1433	req->type = ix;
1164	req->data = newSVsv (pathname);	1434	req_set_path1 (req, pathname);
1165	req->dataptr = SvPVbyte_nolen (req->data);	1435
1166
1167	REQ_SEND;	1436	REQ_SEND;
1168	}	1437	}
1169		1438
1170	void	1439	void
1171	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1440	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1172	SV * oldpath
1173	SV * newpath
1174	SV * callback
1175	ALIAS:	1441	ALIAS:
1176	aio_link = REQ_LINK	1442	aio_link = EIO_LINK
1177	aio_symlink = REQ_SYMLINK	1443	aio_symlink = EIO_SYMLINK
1178	aio_rename = REQ_RENAME	1444	aio_rename = EIO_RENAME
1179	PPCODE:	1445	PPCODE:
1180	{	1446	{
		1447	eio_wd wd2 = 0;
1181	dREQ;	1448	dREQ;
1182		1449
1183	req->type = ix;	1450	req->type = ix;
1184	req->fh = newSVsv (oldpath);	1451	req_set_path1 (req, oldpath);
1185	req->data2ptr = SvPVbyte_nolen (req->fh);	1452	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1186	req->data = newSVsv (newpath);	1453	req->int3 = (long)wd2;
1187	req->dataptr = SvPVbyte_nolen (req->data);
1188		1454
1189	REQ_SEND;	1455	REQ_SEND;
1190	}	1456	}
1191		1457
1192	void	1458	void
1193	aio_sleep (delay,callback=&PL_sv_undef)	1459	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1194	double delay
1195	SV * callback
1196	PPCODE:	1460	PPCODE:
1197	{	1461	{
1198	dREQ;	1462	dREQ;
1199		1463
1200	req->type = REQ_SLEEP;	1464	req->type = EIO_MKNOD;
1201	req->fd = delay < 0. ? 0 : delay;	1465	req->int2 = (mode_t)mode;
1202	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1466	req->offs = dev;
1203		1467	req_set_path1 (req, pathname);
		1468
1204	REQ_SEND;	1469	REQ_SEND;
1205	}	1470	}
1206		1471
1207	void	1472	void
1208	aio_group (callback=&PL_sv_undef)	1473	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1209	SV * callback	1474	ALIAS:
1210	PROTOTYPE: ;$	1475	aio_mtouch = EIO_MTOUCH
		1476	aio_msync = EIO_MSYNC
1211	PPCODE:	1477	PPCODE:
1212	{	1478	{
		1479	STRLEN svlen;
		1480	char *svptr = SvPVbyte (data, svlen);
		1481	UV len = SvUV (length);
		1482
		1483	if (offset < 0)
		1484	offset += svlen;
		1485
		1486	if (offset < 0 || offset > svlen)
		1487	croak ("offset outside of scalar");
		1488
		1489	if (!SvOK (length) || len + offset > svlen)
		1490	len = svlen - offset;
		1491
		1492	{
		1493	dREQ;
		1494
		1495	req->type = ix;
		1496	req->sv2 = SvREFCNT_inc (data);
		1497	req->ptr2 = (char *)svptr + offset;
		1498	req->size = len;
		1499	req->int1 = flags;
		1500
		1501	REQ_SEND;
		1502	}
		1503	}
		1504
		1505	void
		1506	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1507	PPCODE:
		1508	{
		1509	STRLEN svlen;
		1510	char *svptr = SvPVbyte (data, svlen);
		1511	UV len = SvUV (length);
		1512
		1513	if (offset < 0)
		1514	offset += svlen;
		1515
		1516	if (offset < 0 || offset > svlen)
		1517	croak ("offset outside of scalar");
		1518
		1519	if (!SvOK (length) || len + offset > svlen)
		1520	len = svlen - offset;
		1521
		1522	{
		1523	dREQ;
		1524
		1525	req->type = EIO_MLOCK;
		1526	req->sv2 = SvREFCNT_inc (data);
		1527	req->ptr2 = (char *)svptr + offset;
		1528	req->size = len;
		1529
		1530	REQ_SEND;
		1531	}
		1532	}
		1533
		1534	void
		1535	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1536	PPCODE:
		1537	{
		1538	dREQ;
		1539
		1540	req->type = EIO_MLOCKALL;
		1541	req->int1 = flags;
		1542
		1543	REQ_SEND;
		1544	}
		1545
		1546	void
		1547	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1548	PPCODE:
		1549	{
1213	dREQ;	1550	dREQ;
		1551
		1552	req->type = EIO_BUSY;
		1553	req->nv1 = delay < 0. ? 0. : delay;
		1554
		1555	REQ_SEND;
		1556	}
		1557
		1558	void
		1559	aio_group (SV *callback=&PL_sv_undef)
		1560	PPCODE:
		1561	{
		1562	dREQ;
		1563
1214	req->type = REQ_GROUP;	1564	req->type = EIO_GROUP;
		1565
1215	req_send (req);	1566	req_submit (req);
1216	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1567	XPUSHs (req_sv (req, aio_grp_stash));
1217	}	1568	}
1218		1569
1219	void	1570	void
1220	aio_nop (callback=&PL_sv_undef)	1571	aio_nop (SV *callback=&PL_sv_undef)
1221	SV * callback	1572	ALIAS:
		1573	aio_nop = EIO_NOP
		1574	aio_sync = EIO_SYNC
1222	PPCODE:	1575	PPCODE:
1223	{	1576	{
1224	dREQ;	1577	dREQ;
1225		1578
1226	req->type = REQ_NOP;	1579	req->type = ix;
1227		1580
1228	REQ_SEND;	1581	REQ_SEND;
1229	}	1582	}
1230		1583
		1584	int
		1585	aioreq_pri (int pri = 0)
		1586	CODE:
		1587	RETVAL = next_pri;
		1588	if (items > 0)
		1589	{
		1590	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1591	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1592	next_pri = pri;
		1593	}
		1594	OUTPUT:
		1595	RETVAL
		1596
		1597	void
		1598	aioreq_nice (int nice = 0)
		1599	CODE:
		1600	nice = next_pri - nice;
		1601	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1602	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1603	next_pri = nice;
		1604
1231	void	1605	void
1232	flush ()	1606	flush ()
1233	PROTOTYPE:
1234	CODE:	1607	CODE:
1235	while (nreqs)	1608	while (eio_nreqs ())
1236	{	1609	{
1237	poll_wait ();	1610	poll_wait ();
1238	poll_cb ();	1611	poll_cb ();
1239	}	1612	}
1240		1613
1241	void	1614	int
1242	poll()	1615	poll ()
1243	PROTOTYPE:
1244	CODE:	1616	CODE:
1245	if (nreqs)
1246	{
1247	poll_wait ();	1617	poll_wait ();
1248	poll_cb ();	1618	RETVAL = poll_cb ();
1249	}
1250
1251	int
1252	poll_fileno()
1253	PROTOTYPE:
1254	CODE:
1255	RETVAL = respipe [0];
1256	OUTPUT:	1619	OUTPUT:
1257	RETVAL	1620	RETVAL
1258		1621
1259	int	1622	int
		1623	poll_fileno ()
		1624	CODE:
		1625	RETVAL = s_epipe_fd (&respipe);
		1626	OUTPUT:
		1627	RETVAL
		1628
		1629	int
1260	poll_cb(...)	1630	poll_cb (...)
1261	PROTOTYPE:	1631	PROTOTYPE:
1262	CODE:	1632	CODE:
1263	RETVAL = poll_cb ();	1633	RETVAL = poll_cb ();
1264	OUTPUT:	1634	OUTPUT:
1265	RETVAL	1635	RETVAL
1266		1636
1267	void	1637	void
1268	poll_wait()	1638	poll_wait ()
1269	PROTOTYPE:
1270	CODE:	1639	CODE:
1271	if (nreqs)
1272	poll_wait ();	1640	poll_wait ();
1273		1641
1274	int	1642	int
1275	nreqs()	1643	nreqs ()
1276	PROTOTYPE:
1277	CODE:	1644	CODE:
1278	RETVAL = nreqs;	1645	RETVAL = eio_nreqs ();
1279	OUTPUT:	1646	OUTPUT:
1280	RETVAL	1647	RETVAL
1281		1648
		1649	int
		1650	nready ()
		1651	CODE:
		1652	RETVAL = eio_nready ();
		1653	OUTPUT:
		1654	RETVAL
		1655
		1656	int
		1657	npending ()
		1658	CODE:
		1659	RETVAL = eio_npending ();
		1660	OUTPUT:
		1661	RETVAL
		1662
		1663	int
		1664	nthreads ()
		1665	CODE:
		1666	RETVAL = eio_nthreads ();
		1667	OUTPUT:
		1668	RETVAL
		1669
		1670	int
		1671	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1672	CODE:
		1673	RETVAL = posix_fadvise (fh, offset, length, advice);
		1674	OUTPUT:
		1675	RETVAL
		1676
		1677	IV
		1678	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1679	CODE:
		1680	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1681	OUTPUT:
		1682	RETVAL
		1683
		1684	void
		1685	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1686	PPCODE:
		1687	sv_unmagic (scalar, MMAP_MAGIC);
		1688	{
		1689	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1690	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1691	if (addr == (void *)-1)
		1692	XSRETURN_NO;
		1693
		1694	sv_force_normal (scalar);
		1695
		1696	/* we store the length in mg_obj, as namlen is I32 :/ */
		1697	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1698	->mg_obj = (SV *)length;
		1699
		1700	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1701
		1702	if (!(prot & PROT_WRITE))
		1703	SvREADONLY_on (scalar);
		1704
		1705	if (SvLEN (scalar))
		1706	Safefree (SvPVX (scalar));
		1707
		1708	SvPVX (scalar) = (char *)addr;
		1709	SvCUR_set (scalar, length);
		1710	SvLEN_set (scalar, 0);
		1711	SvPOK_only (scalar);
		1712
		1713	XSRETURN_YES;
		1714	}
		1715
		1716	void
		1717	munmap (SV *scalar)
		1718	CODE:
		1719	sv_unmagic (scalar, MMAP_MAGIC);
		1720
		1721	int
		1722	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1723	ALIAS:
		1724	mprotect = 1
		1725	CODE:
		1726	{
		1727	STRLEN svlen;
		1728	void *addr = SvPVbyte (scalar, svlen);
		1729	size_t len = SvUV (length);
		1730
		1731	if (offset < 0)
		1732	offset += svlen;
		1733
		1734	if (offset < 0 || offset > svlen)
		1735	croak ("offset outside of scalar");
		1736
		1737	if (!SvOK (length) || len + offset > svlen)
		1738	len = svlen - offset;
		1739
		1740	addr = (void *)(((intptr_t)addr) + offset);
		1741	eio_page_align (&addr, &len);
		1742
		1743	switch (ix)
		1744	{
		1745	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1746	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1747	}
		1748	}
		1749	OUTPUT:
		1750	RETVAL
		1751
		1752	int
		1753	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1754	CODE:
		1755	{
		1756	STRLEN svlen;
		1757	void *addr = SvPVbyte (scalar, svlen);
		1758	size_t len = SvUV (length);
		1759
		1760	if (offset < 0)
		1761	offset += svlen;
		1762
		1763	if (offset < 0 || offset > svlen)
		1764	croak ("offset outside of scalar");
		1765
		1766	if (!SvOK (length) || len + offset > svlen)
		1767	len = svlen - offset;
		1768
		1769	addr = (void *)(((intptr_t)addr) + offset);
		1770	eio_page_align (&addr, &len);
		1771	#if _POSIX_MEMLOCK_RANGE
		1772	RETVAL = munlock (addr, len);
		1773	#else
		1774	RETVAL = ((errno = ENOSYS), -1);
		1775	#endif
		1776	}
		1777	OUTPUT:
		1778	RETVAL
		1779
		1780	int
		1781	munlockall ()
		1782	CODE:
		1783	#if _POSIX_MEMLOCK
		1784	munlockall ();
		1785	#else
		1786	RETVAL = -1;
		1787	errno = ENOSYS;
		1788	#endif
		1789	OUTPUT:
		1790	RETVAL
		1791
		1792	void _on_next_submit (SV *cb)
		1793	CODE:
		1794	SvREFCNT_dec (on_next_submit);
		1795	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1796
1282	PROTOTYPES: DISABLE	1797	PROTOTYPES: DISABLE
1283		1798
		1799	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1800
		1801	BOOT:
		1802	{
		1803	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1804	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1805	}
		1806
		1807	void
		1808	DESTROY (SV *self)
		1809	CODE:
		1810	{
		1811	aio_wd wd = SvAIO_WD (self);
		1812	#if HAVE_AT
		1813	{
		1814	SV *callback = &PL_sv_undef;
		1815	dREQ; /* clobbers next_pri :/ */
		1816	next_pri = req->pri; /* restore next_pri */
		1817	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		1818	req->type = EIO_WD_CLOSE;
		1819	req->wd = wd;
		1820	REQ_SEND;
		1821	}
		1822	#else
		1823	eio_wd_close_sync (wd);
		1824	#endif
		1825	}
		1826
1284	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1827	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1285		1828
1286	void	1829	void
1287	cancel (aio_req_ornot req)	1830	cancel (aio_req_ornot req)
1288	PROTOTYPE:
1289	CODE:	1831	CODE:
1290	req_cancel (req);	1832	eio_cancel (req);
		1833
		1834	void
		1835	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1836	PPCODE:
		1837	{
		1838	if (GIMME_V != G_VOID)
		1839	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1840
		1841	if (items > 1)
		1842	{
		1843	SV *cb_cv =get_cb (callback);
		1844
		1845	SvREFCNT_dec (req->callback);
		1846	req->callback = SvREFCNT_inc (cb_cv);
		1847	}
		1848	}
1291		1849
1292	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1850	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1293		1851
1294	void	1852	void
1295	add (aio_req grp, ...)	1853	add (aio_req grp, ...)
1296	PPCODE:	1854	PPCODE:
1297	{	1855	{
1298	int i;	1856	int i;
1299	aio_req req;
1300		1857
1301	if (grp->fd == 2)	1858	if (grp->int1 == 2)
1302	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1859	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1303		1860
1304	for (i = 1; i < items; ++i )	1861	for (i = 1; i < items; ++i )
1305	{	1862	{
		1863	aio_req req;
		1864
1306	if (GIMME_V != G_VOID)	1865	if (GIMME_V != G_VOID)
1307	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1866	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1308		1867
1309	req = SvAIO_REQ (ST (i));	1868	req = SvAIO_REQ (ST (i));
1310		1869
1311	if (req)	1870	if (req)
1312	{	1871	eio_grp_add (grp, req);
1313	++grp->length;
1314	req->grp = grp;
1315
1316	req->grp_prev = 0;
1317	req->grp_next = grp->grp_first;
1318
1319	if (grp->grp_first)
1320	grp->grp_first->grp_prev = req;
1321
1322	grp->grp_first = req;
1323	}
1324	}	1872	}
1325	}	1873	}
		1874
		1875	void
		1876	cancel_subs (aio_req_ornot req)
		1877	CODE:
		1878	req_cancel_subs (req);
1326		1879
1327	void	1880	void
1328	result (aio_req grp, ...)	1881	result (aio_req grp, ...)
1329	CODE:	1882	CODE:
1330	{	1883	{
1331	int i;	1884	int i;
		1885	AV *av;
		1886
		1887	grp->errorno = errno;
		1888
1332	AV *av = newAV ();	1889	av = newAV ();
		1890	av_extend (av, items - 1);
1333		1891
1334	for (i = 1; i < items; ++i )	1892	for (i = 1; i < items; ++i )
1335	av_push (av, newSVsv (ST (i)));	1893	av_push (av, newSVsv (ST (i)));
1336		1894
1337	SvREFCNT_dec (grp->data);	1895	SvREFCNT_dec (grp->sv1);
1338	grp->data = (SV *)av;	1896	grp->sv1 = (SV *)av;
1339	}	1897	}
1340		1898
1341	void	1899	void
1342	lock (aio_req grp)	1900	errno (aio_req grp, int errorno = errno)
		1901	CODE:
		1902	grp->errorno = errorno;
		1903
		1904	void
		1905	limit (aio_req grp, int limit)
1343	CODE:	1906	CODE:
1344	++grp->length;	1907	eio_grp_limit (grp, limit);
1345		1908
1346	void	1909	void
1347	unlock (aio_req grp)	1910	feed (aio_req grp, SV *callback=&PL_sv_undef)
1348	CODE:	1911	CODE:
1349	aio_grp_dec (grp);
1350
1351	void
1352	feeder_limit (aio_req grp, int limit)
1353	CODE:
1354	grp->fd2 = limit;
1355	aio_grp_feed (grp);
1356
1357	void
1358	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
1359	CODE:
1360	{	1912	{
1361	SvREFCNT_dec (grp->fh2);	1913	SvREFCNT_dec (grp->sv2);
1362	grp->fh2 = newSVsv (callback);	1914	grp->sv2 = newSVsv (callback);
		1915	grp->feed = aio_grp_feed;
1363		1916
1364	if (grp->fd2 <= 0)	1917	if (grp->int2 <= 0)
1365	grp->fd2 = 2;	1918	grp->int2 = 2;
1366		1919
1367	aio_grp_feed (grp);	1920	eio_grp_limit (grp, grp->int2);
1368	}	1921	}
1369		1922

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