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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.61 by root, Mon Oct 23 22:44:21 2006 UTC vs.
Revision 1.196 by root, Tue Sep 27 00:41:51 2011 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	14	#include <sys/types.h>
17	#include <sys/stat.h>	15	#include <sys/stat.h>
18	#include <limits.h>	16	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	17	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	18	#include <sched.h>
23		19
24	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
25	# if __linux
26	# include <sys/sendfile.h>
27	# elif __freebsd
28	# include <sys/socket.h>
29	# include <sys/uio.h>	21	# include <sys/mman.h>
30	# elif __hpux	22	#endif
		23
		24	/* perl namespace pollution */
		25	#undef VERSION
		26
		27	/* perl stupidly overrides readdir and maybe others */
		28	/* with thread-unsafe versions, imagine that :( */
		29	#undef readdir
		30	#undef opendir
		31	#undef closedir
		32
		33	#ifdef _WIN32
		34
		35	// perl overrides all those nice libc functions
		36
		37	#undef malloc
		38	#undef free
		39	#undef open
		40	#undef read
		41	#undef write
		42	#undef send
		43	#undef recv
		44	#undef stat
		45	#undef lstat
		46	#undef fstat
		47	#undef truncate
		48	#undef ftruncate
		49	#undef open
		50	#undef link
		51	#undef close
		52	#undef unlink
		53	#undef mkdir
		54	#undef rmdir
		55	#undef rename
		56	#undef lseek
		57	#undef opendir
		58	#undef readdir
		59	#undef closedir
		60	#undef chmod
		61	#undef fchmod
		62	#undef dup
		63	#undef dup2
		64	#undef abort
		65	#undef pipe
		66
		67	#else
		68
31	# include <sys/socket.h>	69	#include <sys/time.h>
32	# elif __solaris /* not yet */
33	# include <sys/sendfile.h>	70	#include <sys/select.h>
		71	#include <unistd.h>
		72	#include <utime.h>
		73	#include <signal.h>
		74
		75	#endif
		76
		77	#define EIO_STRUCT_STAT Stat_t
		78
		79	/* use NV for 32 bit perls as it allows larger offsets */
		80	#if IVSIZE >= 8
		81	# define VAL64 IV
		82	# define SvVAL64 SvIV
		83	# define newSVval64 newSViv
		84	#else
		85	# define VAL64 NV
		86	# define SvVAL64 SvNV
		87	# define newSVval64 newSVnv
		88	#endif
		89
		90	/*****************************************************************************/
		91
		92	#if __GNUC__ >= 3
		93	# define expect(expr,value) __builtin_expect ((expr),(value))
		94	#else
		95	# define expect(expr,value) (expr)
		96	#endif
		97
		98	#define expect_false(expr) expect ((expr) != 0, 0)
		99	#define expect_true(expr) expect ((expr) != 0, 1)
		100
		101	/*****************************************************************************/
		102
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		108
		109	#define EIO_REQ_MEMBERS \
		110	SV *callback; \
		111	SV *sv1, *sv2; \
		112	SV *sv3, *sv4; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/config.h"
		119	#include "libeio/eio.h"
		120
		121	static int req_invoke (eio_req *req);
		122	#define EIO_FINISH(req) req_invoke (req)
		123	static void req_destroy (eio_req *grp);
		124	#define EIO_DESTROY(req) req_destroy (req)
		125
		126	#include "libeio/eio.c"
		127
		128	/* Linux/others */
		129	#ifndef O_ASYNC
		130	# define O_ASYNC 0
		131	#endif
		132	#ifndef O_DIRECT
		133	# define O_DIRECT 0
		134	#endif
		135	#ifndef O_NOATIME
		136	# define O_NOATIME 0
		137	#endif
		138
		139	/* POSIX */
		140	#ifndef O_CLOEXEC
		141	# define O_CLOEXEC 0
		142	#endif
		143	#ifndef O_NOFOLLOW
		144	# define O_NOFOLLOW 0
		145	#endif
		146	#ifndef O_NOCTTY
		147	# define O_NOCTTY 0
		148	#endif
		149	#ifndef O_NONBLOCK
		150	# define O_NONBLOCK 0
		151	#endif
		152	#ifndef O_EXEC
		153	# define O_EXEC 0
		154	#endif
		155	#ifndef O_SEARCH
		156	# define O_SEARCH 0
		157	#endif
		158	#ifndef O_DIRECTORY
		159	# define O_DIRECTORY 0
		160	#endif
		161	#ifndef O_DSYNC
		162	# define O_DSYNC 0
		163	#endif
		164	#ifndef O_RSYNC
		165	# define O_RSYNC 0
		166	#endif
		167	#ifndef O_SYNC
		168	# define O_SYNC 0
		169	#endif
		170	#ifndef O_TTY_INIT
		171	# define O_TTY_INIT 0
		172	#endif
		173
		174	#ifndef POSIX_FADV_NORMAL
		175	# define POSIX_FADV_NORMAL 0
		176	#endif
		177	#ifndef POSIX_FADV_SEQUENTIAL
		178	# define POSIX_FADV_SEQUENTIAL 0
		179	#endif
		180	#ifndef POSIX_FADV_RANDOM
		181	# define POSIX_FADV_RANDOM 0
		182	#endif
		183	#ifndef POSIX_FADV_NOREUSE
		184	# define POSIX_FADV_NOREUSE 0
		185	#endif
		186	#ifndef POSIX_FADV_WILLNEED
		187	# define POSIX_FADV_WILLNEED 0
		188	#endif
		189	#ifndef POSIX_FADV_DONTNEED
		190	# define POSIX_FADV_DONTNEED 0
		191	#endif
		192
		193	#if !HAVE_POSIX_FADVISE
		194	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		195	#endif
		196
		197	#ifndef POSIX_MADV_NORMAL
		198	# define POSIX_MADV_NORMAL 0
		199	#endif
		200	#ifndef POSIX_MADV_SEQUENTIAL
		201	# define POSIX_MADV_SEQUENTIAL 0
		202	#endif
		203	#ifndef POSIX_MADV_RANDOM
		204	# define POSIX_MADV_RANDOM 0
		205	#endif
		206	#ifndef POSIX_MADV_WILLNEED
		207	# define POSIX_MADV_WILLNEED 0
		208	#endif
		209	#ifndef POSIX_MADV_DONTNEED
		210	# define POSIX_MADV_DONTNEED 0
		211	#endif
		212
		213	#if !HAVE_POSIX_MADVISE
		214	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		215	#endif
		216
		217	#ifndef PROT_NONE
		218	# define PROT_NONE 0
		219	#endif
		220	#ifndef PROT_READ
		221	# define PROT_READ 0
		222	#endif
		223	#ifndef PROT_WRITE
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_EXEC
		227	# define PROT_EXEC 0
		228	#endif
		229
		230	#ifndef ST_RDONLY
		231	# define ST_RDONLY 0
		232	#endif
		233	#ifndef ST_NOSUID
		234	# define ST_NOSUID 0
		235	#endif
		236	#ifndef ST_NODEV
		237	# define ST_NODEV 0
		238	#endif
		239	#ifndef ST_NOEXEC
		240	# define ST_NOEXEC 0
		241	#endif
		242	#ifndef ST_SYNCHRONOUS
		243	# define ST_SYNCHRONOUS 0
		244	#endif
		245	#ifndef ST_MANDLOCK
		246	# define ST_MANDLOCK 0
		247	#endif
		248	#ifndef ST_WRITE
		249	# define ST_WRITE 0
		250	#endif
		251	#ifndef ST_APPEND
		252	# define ST_APPEND 0
		253	#endif
		254	#ifndef ST_IMMUTABLE
		255	# define ST_IMMUTABLE 0
		256	#endif
		257	#ifndef ST_NOATIME
		258	# define ST_NOATIME 0
		259	#endif
		260	#ifndef ST_NODIRATIME
		261	# define ST_NODIRATIME 0
		262	#endif
		263	#ifndef ST_RELATIME
		264	# define ST_RELATIME 0
		265	#endif
		266
		267	#ifndef S_IFIFO
		268	# define S_IFIFO 0
		269	#endif
		270	#ifndef S_IFCHR
		271	# define S_IFCHR 0
		272	#endif
		273	#ifndef S_IFBLK
		274	# define S_IFBLK 0
		275	#endif
		276	#ifndef S_IFLNK
		277	# define S_IFLNK 0
		278	#endif
		279	#ifndef S_IFREG
		280	# define S_IFREG 0
		281	#endif
		282	#ifndef S_IFDIR
		283	# define S_IFDIR 0
		284	#endif
		285	#ifndef S_IFWHT
		286	# define S_IFWHT 0
		287	#endif
		288	#ifndef S_IFSOCK
		289	# define S_IFSOCK 0
		290	#endif
		291
		292	#ifndef MAP_ANONYMOUS
		293	# ifdef MAP_ANON
		294	# define MAP_ANONYMOUS MAP_ANON
34	# else	295	# else
35	# error sendfile support requested but not available	296	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	297	# endif
37	#endif	298	#endif
38		299	#ifndef MAP_HUGETLB
39	/* used for struct dirent, AIX doesn't provide it */	300	# define MAP_HUGETLB 0
40	#ifndef NAME_MAX
41	# define NAME_MAX 4096
42	#endif	301	#endif
		302	#ifndef MAP_LOCKED
		303	# define MAP_LOCKED 0
		304	#endif
		305	#ifndef MAP_NORESERVE
		306	# define MAP_NORESERVE 0
		307	#endif
		308	#ifndef MAP_POPULATE
		309	# define MAP_POPULATE 0
		310	#endif
		311	#ifndef MAP_NONBLOCK
		312	# define MAP_NONBLOCK 0
		313	#endif
43		314
44	#if __ia64	315	#ifndef makedev
45	# define STACKSIZE 65536	316	# define makedev(maj,min) (((maj) << 8) | (min))
46	#else	317	#endif
47	# define STACKSIZE 8192	318	#ifndef major
		319	# define major(dev) ((dev) >> 8)
		320	#endif
		321	#ifndef minor
		322	# define minor(dev) ((dev) & 0xff)
		323	#endif
		324
		325	#ifndef PAGESIZE
		326	# define PAGESIZE sysconf (_SC_PAGESIZE)
48	#endif	327	#endif
49		328
50	enum {	329	enum {
51	REQ_QUIT,	330	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,
62	};	331	};
63		332
64	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"
66
67	typedef struct aio_cb
68	{
69	struct aio_cb *volatile next;
70
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	Stat_t *statdata;
75	off_t offset;
76	size_t length;
77	ssize_t result;
78
79	STRLEN dataoffset;
80	int type;
81	int fd, fd2;
82	int errorno;
83	mode_t mode; /* open */
84
85	unsigned char flags;
86	unsigned char pri;
87
88	SV *self; /* the perl counterpart of this request, if any */
89	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
90	} aio_cb;
91
92	enum {
93	FLAG_CANCELLED = 0x01,
94	};
95
96	typedef aio_cb *aio_req;	333	typedef eio_req *aio_req;
97	typedef aio_cb *aio_req_ornot;	334	typedef eio_req *aio_req_ornot;
		335	typedef eio_wd aio_wd;
98		336
99	enum {	337	static SV *on_next_submit;
100	PRI_MIN = -4,	338	static int next_pri = EIO_PRI_DEFAULT;
101	PRI_MAX = 4,
102
103	DEFAULT_PRI = 0,
104	PRI_BIAS = -PRI_MIN,
105	};
106
107	static int next_pri = DEFAULT_PRI + PRI_BIAS;
108
109	static int started, wanted;
110	static volatile int nreqs;
111	static int max_outstanding = 1<<30;	339	static int max_outstanding;
112	static int respipe [2];
113		340
114	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	341	static s_epipe respipe;
115	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
116	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
117		342
118	static volatile aio_req reqs, reqe; /* queue start, queue end */	343	static void req_destroy (aio_req req);
119	static volatile aio_req ress, rese; /* queue start, queue end */
120
121	static void req_invoke (aio_req req);	344	static void req_cancel (aio_req req);
122	static void req_free (aio_req req);	345
		346	static void want_poll (void)
		347	{
		348	/* write a dummy byte to the pipe so fh becomes ready */
		349	s_epipe_signal (&respipe);
		350	}
		351
		352	static void done_poll (void)
		353	{
		354	/* read any signals sent by the worker threads */
		355	s_epipe_drain (&respipe);
		356	}
123		357
124	/* must be called at most once */	358	/* must be called at most once */
125	static SV *req_sv (aio_req req, const char *klass)	359	static SV *req_sv (aio_req req, HV *stash)
126	{	360	{
127	if (!req->self)	361	if (!req->self)
128	{	362	{
129	req->self = (SV *)newHV ();	363	req->self = (SV *)newHV ();
130	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	364	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
131	}	365	}
132		366
133	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	367	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		368	}
		369
		370	static SV *
		371	newSVaio_wd (aio_wd wd)
		372	{
		373	return sv_bless (newRV_noinc (newSViv ((long)wd)), aio_wd_stash);
134	}	374	}
135		375
136	static aio_req SvAIO_REQ (SV *sv)	376	static aio_req SvAIO_REQ (SV *sv)
137	{	377	{
138	MAGIC *mg;	378	MAGIC *mg;
139		379
140	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	380	if (!SvROK (sv)
		381	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		382	&& SvSTASH (SvRV (sv)) != aio_req_stash
		383	&& !sv_derived_from (sv, "IO::AIO::REQ")))
141	croak ("object of class " AIO_REQ_KLASS " expected");	384	croak ("object of class IO::AIO::REQ expected");
142		385
143	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	386	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
144		387
145	return mg ? (aio_req)mg->mg_ptr : 0;	388	return mg ? (aio_req)mg->mg_ptr : 0;
146	}	389	}
147		390
		391	static aio_wd SvAIO_WD (SV *sv)
		392	{
		393	if (!SvROK (sv)
		394	|| SvSTASH (SvRV (sv)) != aio_wd_stash
		395	|| SvTYPE (SvRV (sv)) != SVt_PVMG)
		396	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		397
		398	return (aio_wd)(long)SvIVX (SvRV (sv));
		399	}
		400
148	static void aio_grp_feed (aio_req grp)	401	static void aio_grp_feed (aio_req grp)
149	{	402	{
150	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	403	if (grp->sv2 && SvOK (grp->sv2))
151	{	404	{
152	int old_len = grp->length;	405	dSP;
153		406
154	if (grp->fh2 && SvOK (grp->fh2))	407	ENTER;
		408	SAVETMPS;
		409	PUSHMARK (SP);
		410	XPUSHs (req_sv (grp, aio_grp_stash));
		411	PUTBACK;
		412	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		413	SPAGAIN;
		414	FREETMPS;
		415	LEAVE;
		416	}
		417	}
		418
		419	static void req_submit (eio_req *req)
		420	{
		421	eio_submit (req);
		422
		423	if (expect_false (on_next_submit))
		424	{
		425	dSP;
		426	SV *cb = sv_2mortal (on_next_submit);
		427
		428	on_next_submit = 0;
		429
		430	PUSHMARK (SP);
		431	PUTBACK;
		432	call_sv (cb, G_DISCARD | G_EVAL);
		433	}
		434	}
		435
		436	static int req_invoke (eio_req *req)
		437	{
		438	if (req->flags & FLAG_SV2_RO_OFF)
		439	SvREADONLY_off (req->sv2);
		440
		441	if (!EIO_CANCELLED (req) && req->callback)
		442	{
		443	dSP;
		444	static SV *sv_result_cache; /* caches the result integer SV */
		445	SV *sv_result;
		446
		447	ENTER;
		448	SAVETMPS;
		449	PUSHMARK (SP);
		450	EXTEND (SP, 1);
		451
		452	/* do not recreate the result IV from scratch each time */
		453	if (expect_true (sv_result_cache))
155	{	454	{
156	dSP;	455	sv_result = sv_result_cache; sv_result_cache = 0;
157		456	SvIV_set (sv_result, req->result);
158	ENTER;	457	SvIOK_only (sv_result);
159	SAVETMPS;
160	PUSHMARK (SP);
161	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
162	PUTBACK;
163	call_sv (grp->fh2, G_VOID | G_EVAL);
164	SPAGAIN;
165	FREETMPS;
166	LEAVE;
167	}	458	}
168		459	else
169	/* stop if no progress has been made */
170	if (old_len == grp->length)
171	{	460	{
172	SvREFCNT_dec (grp->fh2);	461	sv_result = newSViv (req->result);
173	grp->fh2 = 0;	462	SvREADONLY_on (sv_result);
174	break;
175	}	463	}
		464
		465	switch (req->type)
		466	{
		467	case EIO_WD_OPEN:
		468	PUSHs (sv_2mortal (newSVaio_wd (req->wd)));
		469	break;
		470
		471	case EIO_READDIR:
		472	{
		473	SV *rv = &PL_sv_undef;
		474
		475	if (req->result >= 0)
		476	{
		477	int i;
		478	char *names = (char *)req->ptr2;
		479	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		480	AV *av = newAV ();
		481
		482	av_extend (av, req->result - 1);
		483
		484	for (i = 0; i < req->result; ++i)
		485	{
		486	if (req->int1 & EIO_READDIR_DENTS)
		487	{
		488	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		489
		490	if (req->int1 & EIO_READDIR_CUSTOM2)
		491	{
		492	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		493	AV *avent = newAV ();
		494
		495	av_extend (avent, 2);
		496
		497	if (!sv_type [ent->type])
		498	{
		499	sv_type [ent->type] = newSViv (ent->type);
		500	SvREADONLY_on (sv_type [ent->type]);
		501	}
		502
		503	av_store (avent, 0, namesv);
		504	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		505	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		506
		507	av_store (av, i, newRV_noinc ((SV *)avent));
		508	}
		509	else
		510	av_store (av, i, namesv);
		511
		512	++ent;
		513	}
		514	else
		515	{
		516	SV *name = newSVpv (names, 0);
		517	av_store (av, i, name);
		518	names += SvCUR (name) + 1;
		519	}
		520	}
		521
		522	rv = sv_2mortal (newRV_noinc ((SV *)av));
		523	}
		524
		525	PUSHs (rv);
		526
		527	if (req->int1 & EIO_READDIR_CUSTOM1)
		528	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		529	}
		530	break;
		531
		532	case EIO_OPEN:
		533	{
		534	/* convert fd to fh */
		535	SV *fh = &PL_sv_undef;
		536
		537	if (req->result >= 0)
		538	{
		539	GV *gv = (GV *)sv_newmortal ();
		540	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		541	char sym [64];
		542	int symlen;
		543
		544	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		545	gv_init (gv, aio_stash, sym, symlen, 0);
		546
		547	symlen = snprintf (
		548	sym,
		549	sizeof (sym),
		550	"%s&=%d",
		551	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		552	(int)req->result
		553	);
		554
		555	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		556	fh = (SV *)gv;
		557	}
		558
		559	PUSHs (fh);
		560	}
		561	break;
		562
		563	case EIO_STATVFS:
		564	case EIO_FSTATVFS:
		565	{
		566	SV *rv = &PL_sv_undef;
		567
		568	#ifndef _WIN32
		569	if (req->result >= 0)
		570	{
		571	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		572	HV *hv = newHV ();
		573
		574	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		575
		576	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		577	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		578	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		579	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		580	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		581	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		582	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		583	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		584	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		585	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		586	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		587	}
		588	#endif
		589
		590	PUSHs (rv);
		591	}
		592
		593	break;
		594
		595	case EIO_GROUP:
		596	req->int1 = 2; /* mark group as finished */
		597
		598	if (req->sv1)
		599	{
		600	int i;
		601	AV *av = (AV *)req->sv1;
		602
		603	EXTEND (SP, AvFILL (av) + 1);
		604	for (i = 0; i <= AvFILL (av); ++i)
		605	PUSHs (*av_fetch (av, i, 0));
		606	}
		607	break;
		608
		609	case EIO_NOP:
		610	case EIO_BUSY:
		611	break;
		612
		613	case EIO_READLINK:
		614	case EIO_REALPATH:
		615	if (req->result > 0)
		616	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		617	break;
		618
		619	case EIO_STAT:
		620	case EIO_LSTAT:
		621	case EIO_FSTAT:
		622	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		623	PL_laststatval = req->result;
		624	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		625	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		626	PUSHs (sv_result);
		627	break;
		628
		629	case EIO_READ:
		630	{
		631	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		632	*SvEND (req->sv2) = 0;
		633	SvPOK_only (req->sv2);
		634	SvSETMAGIC (req->sv2);
		635	PUSHs (sv_result);
		636	}
		637	break;
		638
		639	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		640	if (req->result > 0)
		641	SvIV_set (sv_result, 0);
		642	/* FALLTHROUGH */
		643
		644	default:
		645	PUSHs (sv_result);
		646	break;
		647	}
		648
		649	errno = req->errorno;
		650
		651	PUTBACK;
		652	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		653	SPAGAIN;
		654
		655	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		656	SvREFCNT_dec (sv_result);
		657	else
		658	sv_result_cache = sv_result;
		659
		660	FREETMPS;
		661	LEAVE;
		662
		663	PUTBACK;
176	}	664	}
177	}
178		665
179	static void aio_grp_dec (aio_req grp)	666	return !!SvTRUE (ERRSV);
180	{
181	--grp->length;
182
183	/* call feeder, if applicable */
184	aio_grp_feed (grp);
185
186	/* finish, if done */
187	if (!grp->length && grp->fd)
188	{
189	req_invoke (grp);
190	req_free (grp);
191	}
192	}	667	}
193		668
194	static void poll_wait ()
195	{
196	while (nreqs)
197	{
198	aio_req req;
199	pthread_mutex_lock (&reslock);
200	req = ress;
201	pthread_mutex_unlock (&reslock);
202
203	if (req)
204	return;
205
206	fd_set rfd;
207	FD_ZERO(&rfd);
208	FD_SET(respipe [0], &rfd);
209
210	select (respipe [0] + 1, &rfd, 0, 0, 0);
211	}
212	}
213
214	static void req_invoke (aio_req req)
215	{
216	dSP;
217	int errorno = errno;
218
219	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
220	return;
221
222	errno = req->errorno;
223
224	ENTER;
225	SAVETMPS;
226	PUSHMARK (SP);
227	EXTEND (SP, 1);
228
229	switch (req->type)
230	{
231	case REQ_READDIR:
232	{
233	SV *rv = &PL_sv_undef;
234
235	if (req->result >= 0)
236	{
237	char *buf = req->data2ptr;
238	AV *av = newAV ();
239
240	while (req->result)
241	{
242	SV *sv = newSVpv (buf, 0);
243
244	av_push (av, sv);
245	buf += SvCUR (sv) + 1;
246	req->result--;
247	}
248
249	rv = sv_2mortal (newRV_noinc ((SV *)av));
250	}
251
252	PUSHs (rv);
253	}
254	break;
255
256	case REQ_OPEN:
257	{
258	/* convert fd to fh */
259	SV *fh;
260
261	PUSHs (sv_2mortal (newSViv (req->result)));
262	PUTBACK;
263	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
264	SPAGAIN;
265
266	fh = SvREFCNT_inc (POPs);
267
268	PUSHMARK (SP);
269	XPUSHs (sv_2mortal (fh));
270	}
271	break;
272
273	case REQ_GROUP:
274	req->fd = 2; /* mark group as finished */
275
276	if (req->data)
277	{
278	int i;
279	AV *av = (AV *)req->data;
280
281	EXTEND (SP, AvFILL (av) + 1);
282	for (i = 0; i <= AvFILL (av); ++i)
283	PUSHs (*av_fetch (av, i, 0));
284	}
285	break;
286
287	case REQ_NOP:
288	case REQ_SLEEP:
289	break;
290
291	default:
292	PUSHs (sv_2mortal (newSViv (req->result)));
293	break;
294	}
295
296
297	PUTBACK;
298	call_sv (req->callback, G_VOID | G_EVAL);
299	SPAGAIN;
300
301	FREETMPS;
302	LEAVE;
303
304	errno = errorno;
305
306	if (SvTRUE (ERRSV))
307	{
308	req_free (req);
309	croak (0);
310	}
311	}
312
313	static void req_free (aio_req req)	669	static void req_destroy (aio_req req)
314	{	670	{
315	if (req->grp)
316	{
317	aio_req grp = req->grp;
318
319	/* unlink request */
320	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
321	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
322
323	if (grp->grp_first == req)
324	grp->grp_first = req->grp_next;
325
326	aio_grp_dec (grp);
327	}
328
329	if (req->self)	671	if (req->self)
330	{	672	{
331	sv_unmagic (req->self, PERL_MAGIC_ext);	673	sv_unmagic (req->self, PERL_MAGIC_ext);
332	SvREFCNT_dec (req->self);	674	SvREFCNT_dec (req->self);
333	}	675	}
334		676
335	SvREFCNT_dec (req->data);
336	SvREFCNT_dec (req->fh);	677	SvREFCNT_dec (req->sv1);
337	SvREFCNT_dec (req->fh2);	678	SvREFCNT_dec (req->sv2);
		679	SvREFCNT_dec (req->sv3);
		680	SvREFCNT_dec (req->sv4);
338	SvREFCNT_dec (req->callback);	681	SvREFCNT_dec (req->callback);
339	Safefree (req->statdata);
340
341	if (req->type == REQ_READDIR && req->result >= 0)
342	free (req->data2ptr);
343		682
344	Safefree (req);	683	Safefree (req);
345	}	684	}
346		685
347	static void req_cancel (aio_req req)	686	static void req_cancel_subs (aio_req grp)
348	{	687	{
349	req->flags |= FLAG_CANCELLED;
350
351	if (req->type == REQ_GROUP)	688	if (grp->type != EIO_GROUP)
		689	return;
		690
		691	SvREFCNT_dec (grp->sv2);
		692	grp->sv2 = 0;
		693
		694	eio_grp_cancel (grp);
		695	}
		696
		697	static void create_respipe (void)
		698	{
		699	if (s_epipe_renew (&respipe))
		700	croak ("IO::AIO: unable to initialize result pipe");
		701	}
		702
		703	static void poll_wait (void)
		704	{
		705	while (eio_nreqs ())
352	{	706	{
353	aio_req sub;	707	int size;
354		708
355	for (sub = req->grp_first; sub; sub = sub->grp_next)	709	X_LOCK (reslock);
356	req_cancel (sub);	710	size = res_queue.size;
		711	X_UNLOCK (reslock);
		712
		713	if (size)
		714	return;
		715
		716	etp_maybe_start_thread ();
		717
		718	s_epipe_wait (&respipe);
357	}	719	}
358	}	720	}
359		721
360	static int poll_cb ()	722	static int poll_cb (void)
361	{	723	{
362	dSP;
363	int count = 0;
364	int do_croak = 0;
365	aio_req req;
366
367	for (;;)	724	for (;;)
368	{	725	{
369	pthread_mutex_lock (&reslock);	726	int res = eio_poll ();
370	req = ress;
371		727
372	if (req)	728	if (res > 0)
		729	croak (0);
		730
		731	if (!max_outstanding || max_outstanding > eio_nreqs ())
		732	return res;
		733
		734	poll_wait ();
		735	}
		736	}
		737
		738	static void ecb_cold
		739	reinit (void)
		740	{
		741	create_respipe ();
		742
		743	if (eio_init (want_poll, done_poll) < 0)
		744	croak ("IO::AIO: unable to initialise eio library");
		745	}
		746
		747	/*****************************************************************************/
		748
		749	#if !_POSIX_MAPPED_FILES
		750	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		751	# define munmap(addr,length) (errno = ENOSYS, -1)
		752	#endif
		753
		754	#if !_POSIX_MEMORY_PROTECTION
		755	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		756	# define PROT_NONE 0
		757	# define PROT_WRITE 0
		758	# define MAP_PRIVATE 0
		759	# define MAP_SHARED 0
		760	# define MAP_FIXED 0
		761	#endif
		762
		763	#define MMAP_MAGIC PERL_MAGIC_ext
		764
		765	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
		766	{
		767	int old_errno = errno;
		768	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		769	errno = old_errno;
		770
		771	mg->mg_obj = 0; /* just in case */
		772
		773	SvREADONLY_off (sv);
		774
		775	if (SvPVX (sv) != mg->mg_ptr)
		776	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		777
		778	SvCUR_set (sv, 0);
		779	SvPVX (sv) = 0;
		780	SvOK_off (sv);
		781
		782	return 0;
		783	}
		784
		785	static MGVTBL mmap_vtbl = {
		786	0, 0, 0, 0, mmap_free
		787	};
		788
		789	/*****************************************************************************/
		790
		791	static SV * get_cb (SV *cb_sv)
		792	{
		793	SvGETMAGIC (cb_sv);
		794	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		795	}
		796
		797	#define dREQ \
		798	SV *cb_cv; \
		799	aio_req req; \
		800	int req_pri = next_pri; \
		801	next_pri = EIO_PRI_DEFAULT; \
		802	\
		803	cb_cv = get_cb (callback); \
		804	\
		805	Newz (0, req, 1, eio_req); \
		806	if (!req) \
		807	croak ("out of memory during eio_req allocation"); \
		808	\
		809	req->callback = SvREFCNT_inc (cb_cv); \
		810	req->pri = req_pri
		811
		812	#define REQ_SEND \
		813	PUTBACK; \
		814	req_submit (req); \
		815	SPAGAIN; \
		816	\
		817	if (GIMME_V != G_VOID) \
		818	XPUSHs (req_sv (req, aio_req_stash));
		819
		820	static void
		821	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		822	{
		823	if (SvROK (path))
		824	{
		825	AV *av = (AV *)SvRV (path);
		826	SV *wdob;
		827
		828	if (SvTYPE (av) != SVt_PVAV || AvFILLp (av) != 1)
		829	croak ("IO::AIO: pathname arguments must be specified as strings or [wd, path] arrayrefs");
		830
		831	path = AvARRAY (av)[1];
		832	wdob = AvARRAY (av)[0];
		833
		834	if (SvOK (wdob))
373	{	835	{
374	ress = req->next;	836	*wd = SvAIO_WD (wdob);
375		837	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
376	if (!ress)
377	{
378	/* read any signals sent by the worker threads */
379	char buf [32];
380	while (read (respipe [0], buf, 32) == 32)
381	;
382
383	rese = 0;
384	}
385	}
386
387	pthread_mutex_unlock (&reslock);
388
389	if (!req)
390	break;
391
392	--nreqs;
393
394	if (req->type == REQ_QUIT)
395	started--;
396	else if (req->type == REQ_GROUP && req->length)
397	{
398	req->fd = 1; /* mark request as delayed */
399	continue;
400	}	838	}
401	else	839	else
402	{	840	*wd = EIO_INVALID_WD;
403	if (req->type == REQ_READ)
404	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
405
406	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
407	SvREADONLY_off (req->data);
408
409	if (req->statdata)
410	{
411	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
412	PL_laststatval = req->result;
413	PL_statcache = *(req->statdata);
414	}
415
416	req_invoke (req);
417
418	count++;
419	}
420
421	req_free (req);
422	}	841	}
423		842
424	return count;	843	*pathsv = newSVsv (path);
		844	*ptr = SvPVbyte_nolen (*pathsv);
425	}	845	}
426		846
427	static void *aio_proc(void *arg);	847	static void
428		848	req_set_path1 (aio_req req, SV *path)
429	static void start_thread (void)
430	{	849	{
431	sigset_t fullsigset, oldsigset;	850	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
432	pthread_t tid;
433	pthread_attr_t attr;
434
435	pthread_attr_init (&attr);
436	pthread_attr_setstacksize (&attr, STACKSIZE);
437	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
438
439	sigfillset (&fullsigset);
440	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
441
442	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
443	started++;
444
445	sigprocmask (SIG_SETMASK, &oldsigset, 0);
446	}	851	}
447		852
448	static void req_send (aio_req req)	853	static void
		854	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
449	{	855	{
450	while (started < wanted && nreqs >= started)	856	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
451	start_thread ();
452		857
453	++nreqs;	858	switch (SvTYPE (rv))
454
455	pthread_mutex_lock (&reqlock);
456
457	req->next = 0;
458
459	if (reqe)
460	{	859	{
461	reqe->next = req;	860	case SVt_PVIO:
462	reqe = req;	861	case SVt_PVLV:
		862	case SVt_PVGV:
		863	req->type = type_fh;
		864	req->sv1 = newSVsv (fh_or_path);
		865	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		866	break;
		867
		868	default:
		869	req->type = type_path;
		870	req_set_path1 (req, fh_or_path);
		871	break;
463	}	872	}
464	else
465	reqe = reqs = req;
466		873
467	pthread_cond_signal (&reqwait);
468	pthread_mutex_unlock (&reqlock);
469
470	if (nreqs > max_outstanding)
471	for (;;)
472	{
473	poll_cb ();
474
475	if (nreqs <= max_outstanding)
476	break;
477
478	poll_wait ();
479	}
480	}	874	}
481		875
482	static void end_thread (void)	876	MODULE = IO::AIO PACKAGE = IO::AIO
483	{
484	aio_req req;
485	Newz (0, req, 1, aio_cb);
486	req->type = REQ_QUIT;
487		877
488	req_send (req);	878	PROTOTYPES: ENABLE
489	}
490		879
491	static void min_parallel (int nthreads)	880	BOOT:
492	{	881	{
493	if (wanted < nthreads)	882	static const struct {
494	wanted = nthreads;	883	const char *name;
495	}	884	IV iv;
		885	} *civ, const_iv[] = {
		886	# define const_niv(name, value) { # name, (IV) value },
		887	# define const_iv(name) { # name, (IV) name },
		888	# define const_eio(name) { # name, (IV) EIO_ ## name },
		889	const_iv (EXDEV)
		890	const_iv (ENOSYS)
		891	const_iv (O_RDONLY)
		892	const_iv (O_WRONLY)
		893	const_iv (O_RDWR)
		894	const_iv (O_CREAT)
		895	const_iv (O_TRUNC)
		896	const_iv (O_EXCL)
		897	const_iv (O_APPEND)
496		898
497	static void max_parallel (int nthreads)	899	const_iv (O_ASYNC)
498	{	900	const_iv (O_DIRECT)
499	int cur = started;	901	const_iv (O_NOATIME)
500		902
501	if (wanted > nthreads)	903	const_iv (O_CLOEXEC)
502	wanted = nthreads;	904	const_iv (O_NOCTTY)
		905	const_iv (O_NOFOLLOW)
		906	const_iv (O_NONBLOCK)
		907	const_iv (O_EXEC)
		908	const_iv (O_SEARCH)
		909	const_iv (O_DIRECTORY)
		910	const_iv (O_DSYNC)
		911	const_iv (O_RSYNC)
		912	const_iv (O_SYNC)
		913	const_iv (O_TTY_INIT)
503		914
504	while (cur > wanted)	915	const_iv (S_IFIFO)
505	{	916	const_iv (S_IFCHR)
506	end_thread ();	917	const_iv (S_IFBLK)
507	cur--;	918	const_iv (S_IFLNK)
508	}	919	const_iv (S_IFREG)
		920	const_iv (S_IFDIR)
		921	const_iv (S_IFWHT)
		922	const_iv (S_IFSOCK)
		923	const_iv (S_IFMT)
509		924
510	while (started > wanted)	925	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
511	{	926	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
512	poll_wait ();	927	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
513	poll_cb ();	928	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
514	}	929	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
515	}	930	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
516		931
517	static void create_pipe ()	932	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
518	{	933	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
519	if (pipe (respipe))	934	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
520	croak ("unable to initialize result pipe");	935	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		936	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
521		937
522	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	938	const_iv (ST_RDONLY)
523	croak ("cannot set result pipe to nonblocking mode");	939	const_iv (ST_NOSUID)
		940	const_iv (ST_NODEV)
		941	const_iv (ST_NOEXEC)
		942	const_iv (ST_SYNCHRONOUS)
		943	const_iv (ST_MANDLOCK)
		944	const_iv (ST_WRITE)
		945	const_iv (ST_APPEND)
		946	const_iv (ST_IMMUTABLE)
		947	const_iv (ST_NOATIME)
		948	const_iv (ST_NODIRATIME)
		949	const_iv (ST_RELATIME)
524		950
525	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	951	const_iv (PROT_NONE)
526	croak ("cannot set result pipe to nonblocking mode");	952	const_iv (PROT_EXEC)
527	}	953	const_iv (PROT_READ)
		954	const_iv (PROT_WRITE)
528		955
529	/*****************************************************************************/	956	/*const_iv (MAP_FIXED)*/
530	/* work around various missing functions */	957	const_iv (MAP_PRIVATE)
		958	const_iv (MAP_SHARED)
		959	const_iv (MAP_ANONYMOUS)
531		960
532	#if !HAVE_PREADWRITE	961	/* linuxish */
533	# define pread aio_pread	962	const_iv (MAP_HUGETLB)
534	# define pwrite aio_pwrite	963	const_iv (MAP_LOCKED)
		964	const_iv (MAP_NORESERVE)
		965	const_iv (MAP_POPULATE)
		966	const_iv (MAP_NONBLOCK)
535		967
536	/*	968	const_eio (MCL_FUTURE)
537	* make our pread/pwrite safe against themselves, but not against	969	const_eio (MCL_CURRENT)
538	* normal read/write by using a mutex. slows down execution a lot,
539	* but that's your problem, not mine.
540	*/
541	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
542		970
543	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	971	const_eio (MS_ASYNC)
544	{	972	const_eio (MS_INVALIDATE)
545	ssize_t res;	973	const_eio (MS_SYNC)
546	off_t ooffset;
547		974
548	pthread_mutex_lock (&preadwritelock);	975	const_eio (MT_MODIFY)
549	ooffset = lseek (fd, 0, SEEK_CUR);
550	lseek (fd, offset, SEEK_SET);
551	res = read (fd, buf, count);
552	lseek (fd, ooffset, SEEK_SET);
553	pthread_mutex_unlock (&preadwritelock);
554		976
555	return res;	977	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
556	}	978	const_eio (SYNC_FILE_RANGE_WRITE)
		979	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
557		980
558	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	981	const_eio (FALLOC_FL_KEEP_SIZE)
559	{
560	ssize_t res;
561	off_t ooffset;
562		982
563	pthread_mutex_lock (&preadwritelock);	983	const_eio (READDIR_DENTS)
564	ooffset = lseek (fd, 0, SEEK_CUR);	984	const_eio (READDIR_DIRS_FIRST)
565	lseek (fd, offset, SEEK_SET);	985	const_eio (READDIR_STAT_ORDER)
566	res = write (fd, buf, count);	986	const_eio (READDIR_FOUND_UNKNOWN)
567	lseek (fd, offset, SEEK_SET);
568	pthread_mutex_unlock (&preadwritelock);
569		987
570	return res;	988	const_eio (DT_UNKNOWN)
571	}	989	const_eio (DT_FIFO)
572	#endif	990	const_eio (DT_CHR)
573		991	const_eio (DT_DIR)
574	#if !HAVE_FDATASYNC	992	const_eio (DT_BLK)
575	# define fdatasync fsync	993	const_eio (DT_REG)
576	#endif	994	const_eio (DT_LNK)
577		995	const_eio (DT_SOCK)
578	#if !HAVE_READAHEAD	996	const_eio (DT_WHT)
579	# define readahead aio_readahead
580
581	static ssize_t readahead (int fd, off_t offset, size_t count)
582	{
583	char readahead_buf[4096];
584
585	while (count > 0)
586	{
587	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
588
589	pread (fd, readahead_buf, len, offset);
590	offset += len;
591	count -= len;
592	}
593
594	errno = 0;
595	}
596	#endif
597
598	#if !HAVE_READDIR_R
599	# define readdir_r aio_readdir_r
600
601	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
602
603	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
604	{
605	struct dirent *e;
606	int errorno;
607
608	pthread_mutex_lock (&readdirlock);
609
610	e = readdir (dirp);
611	errorno = errno;
612
613	if (e)
614	{
615	*res = ent;
616	strcpy (ent->d_name, e->d_name);
617	}
618	else
619	*res = 0;
620
621	pthread_mutex_unlock (&readdirlock);
622
623	errno = errorno;
624	return e ? 0 : -1;
625	}
626	#endif
627
628	/* sendfile always needs emulation */
629	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
630	{
631	ssize_t res;
632
633	if (!count)
634	return 0;
635
636	#if HAVE_SENDFILE
637	# if __linux
638	res = sendfile (ofd, ifd, &offset, count);
639
640	# elif __freebsd
641	/*
642	* Of course, the freebsd sendfile is a dire hack with no thoughts
643	* wasted on making it similar to other I/O functions.
644	*/
645	{
646	off_t sbytes;
647	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
648
649	if (res < 0 && sbytes)
650	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
651	res = sbytes;
652	}	997	};
653		998
654	# elif __hpux	999	aio_stash = gv_stashpv ("IO::AIO" , 1);
655	res = sendfile (ofd, ifd, offset, count, 0, 0);	1000	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1001	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1002	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
656		1003
657	# elif __solaris	1004	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
658	{	1005	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
659	struct sendfilevec vec;
660	size_t sbytes;
661		1006
662	vec.sfv_fd = ifd;	1007	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
663	vec.sfv_flag = 0;
664	vec.sfv_off = offset;
665	vec.sfv_len = count;
666		1008
667	res = sendfilev (ofd, &vec, 1, &sbytes);	1009	reinit ();
		1010	}
668		1011
669	if (res < 0 && sbytes)	1012	void
		1013	reinit ()
		1014	PROTOTYPE:
		1015
		1016	void
		1017	max_poll_reqs (unsigned int nreqs)
		1018	PROTOTYPE: $
		1019	CODE:
		1020	eio_set_max_poll_reqs (nreqs);
		1021
		1022	void
		1023	max_poll_time (double nseconds)
		1024	PROTOTYPE: $
		1025	CODE:
		1026	eio_set_max_poll_time (nseconds);
		1027
		1028	void
		1029	min_parallel (unsigned int nthreads)
		1030	PROTOTYPE: $
		1031	CODE:
		1032	eio_set_min_parallel (nthreads);
		1033
		1034	void
		1035	max_parallel (unsigned int nthreads)
		1036	PROTOTYPE: $
		1037	CODE:
		1038	eio_set_max_parallel (nthreads);
		1039
		1040	void
		1041	max_idle (unsigned int nthreads)
		1042	PROTOTYPE: $
		1043	CODE:
		1044	eio_set_max_idle (nthreads);
		1045
		1046	void
		1047	idle_timeout (unsigned int seconds)
		1048	PROTOTYPE: $
		1049	CODE:
		1050	eio_set_idle_timeout (seconds);
		1051
		1052	void
		1053	max_outstanding (unsigned int maxreqs)
		1054	PROTOTYPE: $
		1055	CODE:
		1056	max_outstanding = maxreqs;
		1057
		1058	void
		1059	aio_wd (SV8 *pathname, SV *callback=&PL_sv_undef)
		1060	PPCODE:
		1061	{
		1062	dREQ;
		1063
		1064	req->type = EIO_WD_OPEN;
		1065	req_set_path1 (req, pathname);
		1066
		1067	REQ_SEND;
		1068	}
		1069
		1070	void
		1071	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		1072	PPCODE:
		1073	{
		1074	dREQ;
		1075
		1076	req->type = EIO_OPEN;
		1077	req_set_path1 (req, pathname);
		1078	req->int1 = flags;
		1079	req->int2 = mode;
		1080
		1081	REQ_SEND;
		1082	}
		1083
		1084	void
		1085	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		1086	ALIAS:
		1087	aio_fsync = EIO_FSYNC
		1088	aio_fdatasync = EIO_FDATASYNC
		1089	aio_syncfs = EIO_SYNCFS
		1090	PPCODE:
		1091	{
		1092	int fd = s_fileno_croak (fh, 0);
		1093	dREQ;
		1094
		1095	req->type = ix;
		1096	req->sv1 = newSVsv (fh);
		1097	req->int1 = fd;
		1098
		1099	REQ_SEND (req);
		1100	}
		1101
		1102	void
		1103	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1104	PPCODE:
		1105	{
		1106	int fd = s_fileno_croak (fh, 0);
		1107	dREQ;
		1108
		1109	req->type = EIO_SYNC_FILE_RANGE;
		1110	req->sv1 = newSVsv (fh);
		1111	req->int1 = fd;
		1112	req->offs = offset;
670	res = sbytes;	1113	req->size = nbytes;
671	}	1114	req->int2 = flags;
672		1115
673	# endif	1116	REQ_SEND (req);
		1117	}
		1118
		1119	void
		1120	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1121	PPCODE:
		1122	{
		1123	int fd = s_fileno_croak (fh, 0);
		1124	dREQ;
		1125
		1126	req->type = EIO_FALLOCATE;
		1127	req->sv1 = newSVsv (fh);
		1128	req->int1 = fd;
		1129	req->int2 = mode;
		1130	req->offs = offset;
		1131	req->size = len;
		1132
		1133	REQ_SEND (req);
		1134	}
		1135
		1136	void
		1137	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1138	PPCODE:
		1139	{
		1140	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1141	int fd = s_fileno_croak (fh, 0);
		1142	dREQ;
		1143
		1144	if (expect_false (close_fd < 0))
		1145	{
		1146	int pipefd [2];
		1147
		1148	if (
		1149	#ifdef _WIN32
		1150	_pipe (pipefd, 1, _O_BINARY) < 0
674	#else	1151	#else
675	res = -1;	1152	pipe (pipefd) < 0
676	errno = ENOSYS;	1153	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
677	#endif	1154	#endif
678		1155	|| close (pipefd [1]) < 0
679	if (res < 0
680	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
681	#if __solaris
682	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
683	#endif
684	)
685	)
686	{
687	/* emulate sendfile. this is a major pain in the ass */
688	char buf[4096];
689	res = 0;
690
691	while (count)
692	{
693	ssize_t cnt;
694
695	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
696
697	if (cnt <= 0)
698	{	1156	)
699	if (cnt && !res) res = -1;	1157	abort (); /*D*/
700	break;
701	}
702		1158
703	cnt = write (ofd, buf, cnt);	1159	close_fd = pipefd [0];
704
705	if (cnt <= 0)
706	{
707	if (cnt && !res) res = -1;
708	break;
709	}
710
711	offset += cnt;
712	res += cnt;
713	count -= cnt;
714	}
715	}
716
717	return res;
718	}
719
720	/* read a full directory */
721	static int scandir_ (const char *path, void **namesp)
722	{
723	DIR *dirp = opendir (path);
724	union
725	{
726	struct dirent d;
727	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
728	} u;
729	struct dirent *entp;
730	char *name, *names;
731	int memlen = 4096;
732	int memofs = 0;
733	int res = 0;
734	int errorno;
735
736	if (!dirp)
737	return -1;
738
739	names = malloc (memlen);
740
741	for (;;)
742	{
743	errno = 0, readdir_r (dirp, &u.d, &entp);
744
745	if (!entp)
746	break;
747
748	name = entp->d_name;
749
750	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
751	{
752	int len = strlen (name) + 1;
753
754	res++;
755
756	while (memofs + len > memlen)
757	{
758	memlen *= 2;
759	names = realloc (names, memlen);
760	if (!names)
761	break;
762	}
763
764	memcpy (names + memofs, name, len);
765	memofs += len;
766	}
767	}
768
769	errorno = errno;
770	closedir (dirp);
771
772	if (errorno)
773	{
774	free (names);
775	errno = errorno;
776	res = -1;
777	}
778
779	*namesp = (void *)names;
780	return res;
781	}
782
783	/*****************************************************************************/
784
785	static void *aio_proc (void *thr_arg)
786	{
787	aio_req req;
788	int type;
789
790	do
791	{
792	pthread_mutex_lock (&reqlock);
793
794	for (;;)
795	{
796	req = reqs;
797
798	if (reqs)
799	{
800	reqs = reqs->next;
801	if (!reqs) reqe = 0;
802	}
803
804	if (req)
805	break;
806
807	pthread_cond_wait (&reqwait, &reqlock);
808	}
809
810	pthread_mutex_unlock (&reqlock);
811
812	errno = 0; /* strictly unnecessary */
813	type = req->type; /* remember type for QUIT check */
814
815	if (!(req->flags & FLAG_CANCELLED))
816	switch (type)
817	{
818	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
819	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
820
821	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
822	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
823
824	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
825	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
826	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
827
828	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
829	case REQ_CLOSE: req->result = close (req->fd); break;
830	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
831	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
832	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
833	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
834	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
835
836	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
837	case REQ_FSYNC: req->result = fsync (req->fd); break;
838	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
839
840	case REQ_SLEEP:
841	{
842	struct timeval tv;
843
844	tv.tv_sec = req->fd;
845	tv.tv_usec = req->fd2;
846
847	req->result = select (0, 0, 0, 0, &tv);
848	}
849
850	case REQ_GROUP:
851	case REQ_NOP:
852	case REQ_QUIT:
853	break;
854
855	default:
856	req->result = ENOSYS;
857	break;
858	}	1160	}
859		1161
860	req->errorno = errno;
861
862	pthread_mutex_lock (&reslock);
863
864	req->next = 0;
865
866	if (rese)
867	{
868	rese->next = req;
869	rese = req;
870	}
871	else
872	{
873	rese = ress = req;
874
875	/* write a dummy byte to the pipe so fh becomes ready */
876	write (respipe [1], &respipe, 1);
877	}
878
879	pthread_mutex_unlock (&reslock);
880	}
881	while (type != REQ_QUIT);
882
883	return 0;
884	}
885
886	/*****************************************************************************/
887
888	static void atfork_prepare (void)
889	{
890	pthread_mutex_lock (&reqlock);
891	pthread_mutex_lock (&reslock);
892	#if !HAVE_PREADWRITE
893	pthread_mutex_lock (&preadwritelock);
894	#endif
895	#if !HAVE_READDIR_R
896	pthread_mutex_lock (&readdirlock);
897	#endif
898	}
899
900	static void atfork_parent (void)
901	{
902	#if !HAVE_READDIR_R
903	pthread_mutex_unlock (&readdirlock);
904	#endif
905	#if !HAVE_PREADWRITE
906	pthread_mutex_unlock (&preadwritelock);
907	#endif
908	pthread_mutex_unlock (&reslock);
909	pthread_mutex_unlock (&reqlock);
910	}
911
912	static void atfork_child (void)
913	{
914	aio_req prv;
915
916	started = 0;
917
918	while (reqs)
919	{
920	prv = reqs;
921	reqs = prv->next;
922	req_free (prv);
923	}
924
925	reqs = reqe = 0;
926
927	while (ress)
928	{
929	prv = ress;
930	ress = prv->next;
931	req_free (prv);
932	}
933
934	ress = rese = 0;
935
936	close (respipe [0]);
937	close (respipe [1]);
938	create_pipe ();
939
940	atfork_parent ();
941	}
942
943	#define dREQ \
944	aio_req req; \
945	int req_pri = next_pri; \
946	next_pri = DEFAULT_PRI + PRI_BIAS; \
947	\
948	if (SvOK (callback) && !SvROK (callback)) \
949	croak ("callback must be undef or of reference type"); \
950	\
951	Newz (0, req, 1, aio_cb); \
952	if (!req) \
953	croak ("out of memory during aio_req allocation"); \
954	\
955	req->callback = newSVsv (callback); \
956	req->pri = req_pri
957
958	#define REQ_SEND \
959	req_send (req); \
960	\
961	if (GIMME_V != G_VOID) \
962	XPUSHs (req_sv (req, AIO_REQ_KLASS));
963
964	MODULE = IO::AIO PACKAGE = IO::AIO
965
966	PROTOTYPES: ENABLE
967
968	BOOT:
969	{
970	HV *stash = gv_stashpv ("IO::AIO", 1);
971	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
972	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
973	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
974
975	create_pipe ();
976	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
977	}
978
979	void
980	min_parallel (nthreads)
981	int nthreads
982	PROTOTYPE: $
983
984	void
985	max_parallel (nthreads)
986	int nthreads
987	PROTOTYPE: $
988
989	int
990	max_outstanding (nreqs)
991	int nreqs
992	PROTOTYPE: $
993	CODE:
994	RETVAL = max_outstanding;
995	max_outstanding = nreqs;
996
997	void
998	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
999	SV * pathname
1000	int flags
1001	int mode
1002	SV * callback
1003	PROTOTYPE: $$$;$
1004	PPCODE:
1005	{
1006	dREQ;
1007
1008	req->type = REQ_OPEN;	1162	req->type = EIO_DUP2;
		1163	req->int1 = close_fd;
1009	req->data = newSVsv (pathname);	1164	req->sv2 = newSVsv (fh);
1010	req->dataptr = SvPVbyte_nolen (req->data);	1165	req->int2 = fd;
1011	req->fd = flags;
1012	req->mode = mode;
1013		1166
1014	REQ_SEND;	1167	REQ_SEND (req);
1015	}	1168	}
1016		1169
1017	void	1170	void
1018	aio_close (fh,callback=&PL_sv_undef)	1171	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1019	SV * fh
1020	SV * callback
1021	PROTOTYPE: $;$
1022	ALIAS:	1172	ALIAS:
1023	aio_close = REQ_CLOSE
1024	aio_fsync = REQ_FSYNC
1025	aio_fdatasync = REQ_FDATASYNC
1026	PPCODE:
1027	{
1028	dREQ;
1029
1030	req->type = ix;
1031	req->fh = newSVsv (fh);
1032	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1033
1034	REQ_SEND (req);
1035	}
1036
1037	void
1038	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1039	SV * fh
1040	UV offset
1041	UV length
1042	SV * data
1043	UV dataoffset
1044	SV * callback
1045	ALIAS:
1046	aio_read = REQ_READ	1173	aio_read = EIO_READ
1047	aio_write = REQ_WRITE	1174	aio_write = EIO_WRITE
1048	PROTOTYPE: $$$$$;$
1049	PPCODE:	1175	PPCODE:
1050	{	1176	{
1051	aio_req req;
1052	STRLEN svlen;	1177	STRLEN svlen;
		1178	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1053	char *svptr = SvPVbyte (data, svlen);	1179	char *svptr = SvPVbyte (data, svlen);
1054		1180	UV len = SvUV (length);
1055	SvUPGRADE (data, SVt_PV);
1056	SvPOK_on (data);
1057		1181
1058	if (dataoffset < 0)	1182	if (dataoffset < 0)
1059	dataoffset += svlen;	1183	dataoffset += svlen;
1060		1184
1061	if (dataoffset < 0 || dataoffset > svlen)	1185	if (dataoffset < 0 || dataoffset > svlen)
1062	croak ("data offset outside of string");	1186	croak ("dataoffset outside of data scalar");
1063		1187
1064	if (ix == REQ_WRITE)	1188	if (ix == EIO_WRITE)
1065	{	1189	{
1066	/* write: check length and adjust. */	1190	/* write: check length and adjust. */
1067	if (length < 0 || length + dataoffset > svlen)	1191	if (!SvOK (length) || len + dataoffset > svlen)
1068	length = svlen - dataoffset;	1192	len = svlen - dataoffset;
1069	}	1193	}
1070	else	1194	else
1071	{	1195	{
1072	/* read: grow scalar as necessary */	1196	/* read: check type and grow scalar as necessary */
		1197	SvUPGRADE (data, SVt_PV);
1073	svptr = SvGROW (data, length + dataoffset);	1198	svptr = SvGROW (data, len + dataoffset + 1);
1074	}	1199	}
1075
1076	if (length < 0)
1077	croak ("length must not be negative");
1078		1200
1079	{	1201	{
1080	dREQ;	1202	dREQ;
1081		1203
1082	req->type = ix;	1204	req->type = ix;
1083	req->fh = newSVsv (fh);	1205	req->sv1 = newSVsv (fh);
1084	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1206	req->int1 = fd;
1085	: IoOFP (sv_2io (fh)));	1207	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1086	req->offset = offset;	1208	req->size = len;
1087	req->length = length;
1088	req->data = SvREFCNT_inc (data);	1209	req->sv2 = SvREFCNT_inc (data);
1089	req->dataptr = (char *)svptr + dataoffset;	1210	req->ptr2 = (char *)svptr + dataoffset;
		1211	req->stroffset = dataoffset;
1090		1212
1091	if (!SvREADONLY (data))	1213	if (!SvREADONLY (data))
1092	{	1214	{
1093	SvREADONLY_on (data);	1215	SvREADONLY_on (data);
1094	req->data2ptr = (void *)data;	1216	req->flags |= FLAG_SV2_RO_OFF;
1095	}	1217	}
1096		1218
1097	REQ_SEND;	1219	REQ_SEND;
1098	}	1220	}
1099	}	1221	}
1100		1222
1101	void	1223	void
1102	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1224	aio_readlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1103	SV * out_fh	1225	ALIAS:
1104	SV * in_fh	1226	aio_readlink = EIO_READLINK
1105	UV in_offset	1227	aio_realpath = EIO_REALPATH
1106	UV length
1107	SV * callback
1108	PROTOTYPE: $$$$;$
1109	PPCODE:	1228	PPCODE:
1110	{	1229	{
		1230	dREQ;
		1231
		1232	req->type = ix;
		1233	req_set_path1 (req, pathname);
		1234
		1235	REQ_SEND;
		1236	}
		1237
		1238	void
		1239	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1240	PPCODE:
		1241	{
		1242	int ifd = s_fileno_croak (in_fh , 0);
		1243	int ofd = s_fileno_croak (out_fh, 1);
1111	dREQ;	1244	dREQ;
1112		1245
1113	req->type = REQ_SENDFILE;	1246	req->type = EIO_SENDFILE;
1114	req->fh = newSVsv (out_fh);	1247	req->sv1 = newSVsv (out_fh);
1115	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1248	req->int1 = ofd;
1116	req->fh2 = newSVsv (in_fh);	1249	req->sv2 = newSVsv (in_fh);
1117	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1250	req->int2 = ifd;
1118	req->offset = in_offset;	1251	req->offs = in_offset;
1119	req->length = length;	1252	req->size = length;
1120		1253
1121	REQ_SEND;	1254	REQ_SEND;
1122	}	1255	}
1123		1256
1124	void	1257	void
1125	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1258	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1126	SV * fh
1127	UV offset
1128	IV length
1129	SV * callback
1130	PROTOTYPE: $$$;$
1131	PPCODE:	1259	PPCODE:
1132	{	1260	{
		1261	int fd = s_fileno_croak (fh, 0);
1133	dREQ;	1262	dREQ;
1134		1263
1135	req->type = REQ_READAHEAD;	1264	req->type = EIO_READAHEAD;
1136	req->fh = newSVsv (fh);	1265	req->sv1 = newSVsv (fh);
1137	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1266	req->int1 = fd;
1138	req->offset = offset;	1267	req->offs = offset;
1139	req->length = length;	1268	req->size = length;
1140		1269
1141	REQ_SEND;	1270	REQ_SEND;
1142	}	1271	}
1143		1272
1144	void	1273	void
1145	aio_stat (fh_or_path,callback=&PL_sv_undef)	1274	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1146	SV * fh_or_path
1147	SV * callback
1148	ALIAS:	1275	ALIAS:
1149	aio_stat = REQ_STAT	1276	aio_stat = EIO_STAT
1150	aio_lstat = REQ_LSTAT	1277	aio_lstat = EIO_LSTAT
		1278	aio_statvfs = EIO_STATVFS
1151	PPCODE:	1279	PPCODE:
1152	{	1280	{
1153	dREQ;	1281	dREQ;
1154		1282
1155	New (0, req->statdata, 1, Stat_t);
1156	if (!req->statdata)
1157	{
1158	req_free (req);
1159	croak ("out of memory during aio_req->statdata allocation");
1160	}
1161
1162	if (SvPOK (fh_or_path))
1163	{
1164	req->type = ix;
1165	req->data = newSVsv (fh_or_path);
1166	req->dataptr = SvPVbyte_nolen (req->data);
1167	}
1168	else
1169	{
1170	req->type = REQ_FSTAT;
1171	req->fh = newSVsv (fh_or_path);	1283	req->sv1 = newSVsv (fh_or_path);
1172	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1284	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
1173	}
1174
1175	REQ_SEND;	1285	REQ_SEND;
1176	}	1286	}
1177		1287
		1288	UV
		1289	major (UV dev)
		1290	ALIAS:
		1291	minor = 1
		1292	CODE:
		1293	RETVAL = ix ? major (dev) : minor (dev);
		1294	OUTPUT:
		1295	RETVAL
		1296
		1297	UV
		1298	makedev (UV maj, UV min)
		1299	CODE:
		1300	RETVAL = makedev (maj, min);
		1301	OUTPUT:
		1302	RETVAL
		1303
1178	void	1304	void
		1305	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1306	PPCODE:
		1307	{
		1308	dREQ;
		1309
		1310	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1311	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1312	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1313
		1314	REQ_SEND;
		1315	}
		1316
		1317	void
		1318	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1319	PPCODE:
		1320	{
		1321	dREQ;
		1322
		1323	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1324	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1325
		1326	REQ_SEND;
		1327	}
		1328
		1329	void
		1330	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1331	ALIAS:
		1332	aio_chmod = EIO_CHMOD
		1333	aio_mkdir = EIO_MKDIR
		1334	PPCODE:
		1335	{
		1336	dREQ;
		1337
		1338	req->int2 = mode;
		1339	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1340
		1341	REQ_SEND;
		1342	}
		1343
		1344	void
		1345	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1346	PPCODE:
		1347	{
		1348	dREQ;
		1349
		1350	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1351	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1352	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1353
		1354	REQ_SEND;
		1355	}
		1356
		1357	void
		1358	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1359	PPCODE:
		1360	{
		1361	dREQ;
		1362
		1363	req->type = EIO_READDIR;
		1364	req->sv1 = newSVsv (pathname);
		1365	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1366	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1367
		1368	if (flags & EIO_READDIR_DENTS)
		1369	req->int1 |= EIO_READDIR_CUSTOM2;
		1370
		1371	REQ_SEND;
		1372	}
		1373
		1374	void
1179	aio_unlink (pathname,callback=&PL_sv_undef)	1375	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1180	SV * pathname
1181	SV * callback
1182	ALIAS:	1376	ALIAS:
1183	aio_unlink = REQ_UNLINK	1377	aio_unlink = EIO_UNLINK
1184	aio_rmdir = REQ_RMDIR	1378	aio_rmdir = EIO_RMDIR
1185	aio_readdir = REQ_READDIR	1379	aio_readdir = EIO_READDIR
1186	PPCODE:	1380	PPCODE:
1187	{	1381	{
1188	dREQ;	1382	dREQ;
1189		1383
1190	req->type = ix;	1384	req->type = ix;
1191	req->data = newSVsv (pathname);	1385	req_set_path1 (req, pathname);
1192	req->dataptr = SvPVbyte_nolen (req->data);	1386
		1387	REQ_SEND;
		1388	}
		1389
		1390	void
		1391	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1392	ALIAS:
		1393	aio_link = EIO_LINK
		1394	aio_symlink = EIO_SYMLINK
		1395	aio_rename = EIO_RENAME
		1396	PPCODE:
		1397	{
		1398	dREQ;
		1399	eio_wd wd2;
		1400
		1401	req->type = ix;
		1402	req_set_path1 (req, oldpath);
		1403	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1404	req->int3 = (long)wd2;
1193		1405
1194	REQ_SEND;	1406	REQ_SEND;
1195	}	1407	}
1196		1408
1197	void	1409	void
1198	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1410	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1199	SV * oldpath
1200	SV * newpath
1201	SV * callback
1202	ALIAS:
1203	aio_link = REQ_LINK
1204	aio_symlink = REQ_SYMLINK
1205	aio_rename = REQ_RENAME
1206	PPCODE:	1411	PPCODE:
1207	{	1412	{
1208	dREQ;	1413	dREQ;
1209		1414
1210	req->type = ix;	1415	req->type = EIO_MKNOD;
1211	req->fh = newSVsv (oldpath);	1416	req->int2 = (mode_t)mode;
1212	req->data2ptr = SvPVbyte_nolen (req->fh);	1417	req->offs = dev;
1213	req->data = newSVsv (newpath);	1418	req_set_path1 (req, pathname);
1214	req->dataptr = SvPVbyte_nolen (req->data);
1215		1419
1216	REQ_SEND;	1420	REQ_SEND;
1217	}	1421	}
1218		1422
1219	void	1423	void
		1424	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1425	ALIAS:
		1426	aio_mtouch = EIO_MTOUCH
		1427	aio_msync = EIO_MSYNC
		1428	PPCODE:
		1429	{
		1430	STRLEN svlen;
		1431	char *svptr = SvPVbyte (data, svlen);
		1432	UV len = SvUV (length);
		1433
		1434	if (offset < 0)
		1435	offset += svlen;
		1436
		1437	if (offset < 0 || offset > svlen)
		1438	croak ("offset outside of scalar");
		1439
		1440	if (!SvOK (length) || len + offset > svlen)
		1441	len = svlen - offset;
		1442
		1443	{
		1444	dREQ;
		1445
		1446	req->type = ix;
		1447	req->sv2 = SvREFCNT_inc (data);
		1448	req->ptr2 = (char *)svptr + offset;
		1449	req->size = len;
		1450	req->int1 = flags;
		1451
		1452	REQ_SEND;
		1453	}
		1454	}
		1455
		1456	void
		1457	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1458	PPCODE:
		1459	{
		1460	STRLEN svlen;
		1461	char *svptr = SvPVbyte (data, svlen);
		1462	UV len = SvUV (length);
		1463
		1464	if (offset < 0)
		1465	offset += svlen;
		1466
		1467	if (offset < 0 || offset > svlen)
		1468	croak ("offset outside of scalar");
		1469
		1470	if (!SvOK (length) || len + offset > svlen)
		1471	len = svlen - offset;
		1472
		1473	{
		1474	dREQ;
		1475
		1476	req->type = EIO_MLOCK;
		1477	req->sv2 = SvREFCNT_inc (data);
		1478	req->ptr2 = (char *)svptr + offset;
		1479	req->size = len;
		1480
		1481	REQ_SEND;
		1482	}
		1483	}
		1484
		1485	void
		1486	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1487	PPCODE:
		1488	{
		1489	dREQ;
		1490
		1491	req->type = EIO_MLOCKALL;
		1492	req->int1 = flags;
		1493
		1494	REQ_SEND;
		1495	}
		1496
		1497	void
1220	aio_sleep (delay,callback=&PL_sv_undef)	1498	aio_busy (double delay, SV *callback=&PL_sv_undef)
1221	double delay
1222	SV * callback
1223	PPCODE:	1499	PPCODE:
1224	{	1500	{
1225	dREQ;	1501	dREQ;
1226		1502
1227	req->type = REQ_SLEEP;	1503	req->type = EIO_BUSY;
1228	req->fd = delay < 0. ? 0 : delay;	1504	req->nv1 = delay < 0. ? 0. : delay;
1229	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1230		1505
1231	REQ_SEND;	1506	REQ_SEND;
1232	}	1507	}
1233		1508
1234	void	1509	void
1235	aio_group (callback=&PL_sv_undef)	1510	aio_group (SV *callback=&PL_sv_undef)
1236	SV * callback
1237	PROTOTYPE: ;$
1238	PPCODE:	1511	PPCODE:
1239	{	1512	{
1240	dREQ;	1513	dREQ;
1241		1514
1242	req->type = REQ_GROUP;	1515	req->type = EIO_GROUP;
		1516
1243	req_send (req);	1517	req_submit (req);
1244
1245	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1518	XPUSHs (req_sv (req, aio_grp_stash));
1246	}	1519	}
1247		1520
1248	void	1521	void
1249	aio_nop (callback=&PL_sv_undef)	1522	aio_nop (SV *callback=&PL_sv_undef)
1250	SV * callback	1523	ALIAS:
		1524	aio_nop = EIO_NOP
		1525	aio_sync = EIO_SYNC
1251	PPCODE:	1526	PPCODE:
1252	{	1527	{
1253	dREQ;	1528	dREQ;
1254		1529
1255	req->type = REQ_NOP;	1530	req->type = ix;
1256		1531
1257	REQ_SEND;	1532	REQ_SEND;
1258	}	1533	}
1259		1534
1260	#if 0	1535	int
1261		1536	aioreq_pri (int pri = 0)
1262	void
1263	aio_pri (int pri = DEFAULT_PRI)
1264	CODE:	1537	CODE:
		1538	RETVAL = next_pri;
		1539	if (items > 0)
		1540	{
1265	if (pri < PRI_MIN) pri = PRI_MIN;	1541	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1266	if (pri > PRI_MAX) pri = PRI_MAX;	1542	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1267	next_pri = pri + PRI_BIAS;	1543	next_pri = pri;
		1544	}
		1545	OUTPUT:
		1546	RETVAL
1268		1547
1269	#endif	1548	void
		1549	aioreq_nice (int nice = 0)
		1550	CODE:
		1551	nice = next_pri - nice;
		1552	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1553	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1554	next_pri = nice;
1270		1555
1271	void	1556	void
1272	flush ()	1557	flush ()
1273	PROTOTYPE:
1274	CODE:	1558	CODE:
1275	while (nreqs)	1559	while (eio_nreqs ())
1276	{	1560	{
1277	poll_wait ();	1561	poll_wait ();
1278	poll_cb ();	1562	poll_cb ();
1279	}	1563	}
1280		1564
1281	void
1282	poll()
1283	PROTOTYPE:
1284	CODE:
1285	if (nreqs)
1286	{
1287	poll_wait ();
1288	poll_cb ();
1289	}
1290
1291	int	1565	int
1292	poll_fileno()	1566	poll ()
1293	PROTOTYPE:
1294	CODE:	1567	CODE:
1295	RETVAL = respipe [0];	1568	poll_wait ();
1296	OUTPUT:
1297	RETVAL
1298
1299	int
1300	poll_cb(...)
1301	PROTOTYPE:
1302	CODE:
1303	RETVAL = poll_cb ();	1569	RETVAL = poll_cb ();
1304	OUTPUT:	1570	OUTPUT:
1305	RETVAL	1571	RETVAL
1306		1572
1307	void
1308	poll_wait()
1309	PROTOTYPE:
1310	CODE:
1311	if (nreqs)
1312	poll_wait ();
1313
1314	int	1573	int
1315	nreqs()	1574	poll_fileno ()
1316	PROTOTYPE:
1317	CODE:	1575	CODE:
1318	RETVAL = nreqs;	1576	RETVAL = s_epipe_fd (&respipe);
1319	OUTPUT:	1577	OUTPUT:
1320	RETVAL	1578	RETVAL
1321		1579
		1580	int
		1581	poll_cb (...)
		1582	PROTOTYPE:
		1583	CODE:
		1584	RETVAL = poll_cb ();
		1585	OUTPUT:
		1586	RETVAL
		1587
		1588	void
		1589	poll_wait ()
		1590	CODE:
		1591	poll_wait ();
		1592
		1593	int
		1594	nreqs ()
		1595	CODE:
		1596	RETVAL = eio_nreqs ();
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	int
		1601	nready ()
		1602	CODE:
		1603	RETVAL = eio_nready ();
		1604	OUTPUT:
		1605	RETVAL
		1606
		1607	int
		1608	npending ()
		1609	CODE:
		1610	RETVAL = eio_npending ();
		1611	OUTPUT:
		1612	RETVAL
		1613
		1614	int
		1615	nthreads ()
		1616	CODE:
		1617	RETVAL = eio_nthreads ();
		1618	OUTPUT:
		1619	RETVAL
		1620
		1621	int
		1622	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1623	CODE:
		1624	RETVAL = posix_fadvise (fh, offset, length, advice);
		1625	OUTPUT:
		1626	RETVAL
		1627
		1628	IV
		1629	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1630	CODE:
		1631	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1632	OUTPUT:
		1633	RETVAL
		1634
		1635	void
		1636	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1637	PPCODE:
		1638	sv_unmagic (scalar, MMAP_MAGIC);
		1639	{
		1640	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1641	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1642	if (addr == (void *)-1)
		1643	XSRETURN_NO;
		1644
		1645	sv_force_normal (scalar);
		1646
		1647	/* we store the length in mg_obj, as namlen is I32 :/ */
		1648	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1649	->mg_obj = (SV *)length;
		1650
		1651	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1652
		1653	if (!(prot & PROT_WRITE))
		1654	SvREADONLY_on (scalar);
		1655
		1656	if (SvLEN (scalar))
		1657	Safefree (SvPVX (scalar));
		1658
		1659	SvPVX (scalar) = (char *)addr;
		1660	SvCUR_set (scalar, length);
		1661	SvLEN_set (scalar, 0);
		1662	SvPOK_only (scalar);
		1663
		1664	XSRETURN_YES;
		1665	}
		1666
		1667	void
		1668	munmap (SV *scalar)
		1669	CODE:
		1670	sv_unmagic (scalar, MMAP_MAGIC);
		1671
		1672	int
		1673	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1674	ALIAS:
		1675	mprotect = 1
		1676	CODE:
		1677	{
		1678	STRLEN svlen;
		1679	void *addr = SvPVbyte (scalar, svlen);
		1680	size_t len = SvUV (length);
		1681
		1682	if (offset < 0)
		1683	offset += svlen;
		1684
		1685	if (offset < 0 || offset > svlen)
		1686	croak ("offset outside of scalar");
		1687
		1688	if (!SvOK (length) || len + offset > svlen)
		1689	len = svlen - offset;
		1690
		1691	addr = (void *)(((intptr_t)addr) + offset);
		1692	eio_page_align (&addr, &len);
		1693
		1694	switch (ix)
		1695	{
		1696	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1697	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1698	}
		1699	}
		1700	OUTPUT:
		1701	RETVAL
		1702
		1703	int
		1704	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1705	CODE:
		1706	{
		1707	STRLEN svlen;
		1708	void *addr = SvPVbyte (scalar, svlen);
		1709	size_t len = SvUV (length);
		1710
		1711	if (offset < 0)
		1712	offset += svlen;
		1713
		1714	if (offset < 0 || offset > svlen)
		1715	croak ("offset outside of scalar");
		1716
		1717	if (!SvOK (length) || len + offset > svlen)
		1718	len = svlen - offset;
		1719
		1720	addr = (void *)(((intptr_t)addr) + offset);
		1721	eio_page_align (&addr, &len);
		1722	#if _POSIX_MEMLOCK_RANGE
		1723	RETVAL = munlock (addr, len);
		1724	#else
		1725	RETVAL = ((errno = ENOSYS), -1);
		1726	#endif
		1727	}
		1728	OUTPUT:
		1729	RETVAL
		1730
		1731	int
		1732	munlockall ()
		1733	CODE:
		1734	#if _POSIX_MEMLOCK
		1735	munlockall ();
		1736	#else
		1737	RETVAL = -1;
		1738	errno = ENOSYS;
		1739	#endif
		1740	OUTPUT:
		1741	RETVAL
		1742
		1743	void _on_next_submit (SV *cb)
		1744	CODE:
		1745	SvREFCNT_dec (on_next_submit);
		1746	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1747
1322	PROTOTYPES: DISABLE	1748	PROTOTYPES: DISABLE
1323		1749
		1750	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		1751
		1752	BOOT:
		1753	{
		1754	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		1755	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		1756	}
		1757
		1758	void
		1759	DESTROY (SV *self)
		1760	CODE:
		1761	{
		1762	aio_wd wd = SvAIO_WD (self);
		1763	#if HAVE_AT
		1764	SV *callback = &PL_sv_undef;
		1765	dREQ; /* clobbers next_pri :/ */
		1766	req->type = EIO_WD_CLOSE;
		1767	req->wd = wd;
		1768	REQ_SEND;
		1769	#else
		1770	eio_wd_close_sync (wd);
		1771	#endif
		1772	}
		1773
1324	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1774	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1325		1775
1326	void	1776	void
1327	cancel (aio_req_ornot req)	1777	cancel (aio_req_ornot req)
1328	PROTOTYPE:
1329	CODE:	1778	CODE:
1330	req_cancel (req);	1779	eio_cancel (req);
1331		1780
1332	void	1781	void
1333	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1782	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1334	CODE:	1783	PPCODE:
		1784	{
		1785	if (GIMME_V != G_VOID)
		1786	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1787
		1788	if (items > 1)
		1789	{
		1790	SV *cb_cv =get_cb (callback);
		1791
1335	SvREFCNT_dec (req->callback);	1792	SvREFCNT_dec (req->callback);
1336	req->callback = newSVsv (callback);	1793	req->callback = SvREFCNT_inc (cb_cv);
		1794	}
		1795	}
1337		1796
1338	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1797	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1339		1798
1340	void	1799	void
1341	add (aio_req grp, ...)	1800	add (aio_req grp, ...)
1342	PPCODE:	1801	PPCODE:
1343	{	1802	{
1344	int i;	1803	int i;
1345	aio_req req;
1346		1804
1347	if (grp->fd == 2)	1805	if (grp->int1 == 2)
1348	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1806	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1349		1807
1350	for (i = 1; i < items; ++i )	1808	for (i = 1; i < items; ++i )
1351	{	1809	{
		1810	aio_req req;
		1811
1352	if (GIMME_V != G_VOID)	1812	if (GIMME_V != G_VOID)
1353	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1813	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1354		1814
1355	req = SvAIO_REQ (ST (i));	1815	req = SvAIO_REQ (ST (i));
1356		1816
1357	if (req)	1817	if (req)
1358	{	1818	eio_grp_add (grp, req);
1359	++grp->length;
1360	req->grp = grp;
1361
1362	req->grp_prev = 0;
1363	req->grp_next = grp->grp_first;
1364
1365	if (grp->grp_first)
1366	grp->grp_first->grp_prev = req;
1367
1368	grp->grp_first = req;
1369	}
1370	}	1819	}
1371	}	1820	}
		1821
		1822	void
		1823	cancel_subs (aio_req_ornot req)
		1824	CODE:
		1825	req_cancel_subs (req);
1372		1826
1373	void	1827	void
1374	result (aio_req grp, ...)	1828	result (aio_req grp, ...)
1375	CODE:	1829	CODE:
1376	{	1830	{
1377	int i;	1831	int i;
		1832	AV *av;
		1833
		1834	grp->errorno = errno;
		1835
1378	AV *av = newAV ();	1836	av = newAV ();
		1837	av_extend (av, items - 1);
1379		1838
1380	for (i = 1; i < items; ++i )	1839	for (i = 1; i < items; ++i )
1381	av_push (av, newSVsv (ST (i)));	1840	av_push (av, newSVsv (ST (i)));
1382		1841
1383	SvREFCNT_dec (grp->data);	1842	SvREFCNT_dec (grp->sv1);
1384	grp->data = (SV *)av;	1843	grp->sv1 = (SV *)av;
1385	}	1844	}
1386		1845
1387	void	1846	void
		1847	errno (aio_req grp, int errorno = errno)
		1848	CODE:
		1849	grp->errorno = errorno;
		1850
		1851	void
1388	feed_limit (aio_req grp, int limit)	1852	limit (aio_req grp, int limit)
1389	CODE:	1853	CODE:
1390	grp->fd2 = limit;	1854	eio_grp_limit (grp, limit);
1391	aio_grp_feed (grp);
1392		1855
1393	void	1856	void
1394	feed (aio_req grp, SV *callback=&PL_sv_undef)	1857	feed (aio_req grp, SV *callback=&PL_sv_undef)
1395	CODE:	1858	CODE:
1396	{	1859	{
1397	SvREFCNT_dec (grp->fh2);	1860	SvREFCNT_dec (grp->sv2);
1398	grp->fh2 = newSVsv (callback);	1861	grp->sv2 = newSVsv (callback);
		1862	grp->feed = aio_grp_feed;
1399		1863
1400	if (grp->fd2 <= 0)	1864	if (grp->int2 <= 0)
1401	grp->fd2 = 2;	1865	grp->int2 = 2;
1402		1866
1403	aio_grp_feed (grp);	1867	eio_grp_limit (grp, grp->int2);
1404	}	1868	}
1405		1869

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