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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.22 by root, Tue Aug 16 22:22:18 2005 UTC vs.
Revision 1.279 by root, Fri Sep 6 22:03:45 2019 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"
		8	#include "perliol.h"
7		9
8	#include "autoconf/config.h"	10	#if !defined mg_findext
		11	# define mg_findext(sv,type,vtbl) mg_find (sv, type)
		12	#endif
9		13
		14	#include <stddef.h>
		15	#include <stdlib.h>
		16	#include <errno.h>
10	#include <sys/types.h>	17	#include <sys/types.h>
		18	#include <sys/socket.h>
11	#include <sys/stat.h>	19	#include <sys/stat.h>
12
13	#include <unistd.h>	20	#include <limits.h>
14	#include <fcntl.h>	21	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	22	#include <sched.h>
17		23
18	#include <pthread.h>	24	/* the incompetent fool that created musl keeps __linux__, refuses
		25	* to implement any linux standard apis, and also has no way to test
		26	* for his broken iplementation. don't complain to me if this fails
		27	* for you.
		28	*/
		29	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		30	# include <linux/fs.h>
		31	# ifdef FS_IOC_FIEMAP
		32	# include <linux/types.h>
		33	# include <linux/fiemap.h>
		34	# define HAVE_FIEMAP 1
		35	# endif
		36	#endif
19		37
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	38	/* perl namespace pollution */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	39	#undef VERSION
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		40
24	#if __ia64	41	/* perl stupidly overrides readdir and maybe others */
25	# define STACKSIZE 65536	42	/* with thread-unsafe versions, imagine that :( */
		43	#undef readdir
		44	#undef opendir
		45	#undef closedir
		46
		47	#ifdef _WIN32
		48
		49	// perl overrides all those nice libc functions
		50
		51	#undef malloc
		52	#undef free
		53	#undef open
		54	#undef read
		55	#undef write
		56	#undef send
		57	#undef recv
		58	#undef stat
		59	#undef lstat
		60	#undef fstat
		61	#undef truncate
		62	#undef ftruncate
		63	#undef open
		64	#undef link
		65	#undef close
		66	#undef unlink
		67	#undef mkdir
		68	#undef rmdir
		69	#undef rename
		70	#undef lseek
		71	#undef opendir
		72	#undef readdir
		73	#undef closedir
		74	#undef chmod
		75	#undef fchmod
		76	#undef dup
		77	#undef dup2
		78	#undef abort
		79	#undef pipe
		80	#undef utime
		81
		82	#define EIO_STRUCT_STAT struct _stati64
		83	#define EIO_STRUCT_STATI64
		84
26	#else	85	#else
27	# define STACKSIZE 4096	86
		87	#include <sys/time.h>
		88	#include <sys/select.h>
		89	#include <unistd.h>
		90	#include <utime.h>
		91	#include <signal.h>
		92
		93	#define EIO_STRUCT_STAT Stat_t
		94
		95	#endif
		96
		97	/*****************************************************************************/
		98
		99	#if __GNUC__ >= 3
		100	# define expect(expr,value) __builtin_expect ((expr),(value))
		101	#else
		102	# define expect(expr,value) (expr)
		103	#endif
		104
		105	#define expect_false(expr) expect ((expr) != 0, 0)
		106	#define expect_true(expr) expect ((expr) != 0, 1)
		107
		108	/*****************************************************************************/
		109
		110	#include "config.h"
		111
		112	#if HAVE_SYS_MKDEV_H
		113	# include <sys/mkdev.h>
		114	#elif HAVE_SYS_SYSMACROS_H
		115	# include <sys/sysmacros.h>
		116	#endif
		117
		118	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		119	# include <sys/mman.h>
		120	#endif
		121
		122	#if HAVE_SYS_UIO_H
		123	# include <sys/uio.h>
		124	#endif
		125
		126	#if HAVE_ST_XTIMENSEC
		127	# define ATIMENSEC PL_statcache.st_atimensec
		128	# define MTIMENSEC PL_statcache.st_mtimensec
		129	# define CTIMENSEC PL_statcache.st_ctimensec
		130	#elif HAVE_ST_XTIMESPEC
		131	# define ATIMENSEC PL_statcache.st_atim.tv_nsec
		132	# define MTIMENSEC PL_statcache.st_mtim.tv_nsec
		133	# define CTIMENSEC PL_statcache.st_ctim.tv_nsec
		134	#else
		135	# define ATIMENSEC 0
		136	# define MTIMENSEC 0
		137	# define CTIMENSEC 0
		138	#endif
		139
		140	#if HAVE_ST_BIRTHTIMENSEC
		141	# define BTIMESEC PL_statcache.st_birthtime
		142	# define BTIMENSEC PL_statcache.st_birthtimensec
		143	#elif HAVE_ST_BIRTHTIMESPEC
		144	# define BTIMESEC PL_statcache.st_birthtim.tv_sec
		145	# define BTIMENSEC PL_statcache.st_birthtim.tv_nsec
		146	#else
		147	# define BTIMESEC 0
		148	# define BTIMENSEC 0
		149	#endif
		150
		151	#if HAVE_ST_GEN
		152	# define ST_GEN PL_statcache.st_gen
		153	#else
		154	# define ST_GEN 0
		155	#endif
		156
		157	#include "schmorp.h"
		158
		159	#if HAVE_EVENTFD
		160	# include <sys/eventfd.h>
		161	#endif
		162
		163	#if HAVE_TIMERFD
		164	# include <sys/timerfd.h>
		165	#endif
		166
		167	#if HAVE_RLIMITS
		168	#include <sys/time.h>
		169	#include <sys/resource.h>
		170	#endif
		171
		172	typedef SV SV8; /* byte-sv, used for argument-checking */
		173	typedef int aio_rfd; /* read file desriptor */
		174	typedef int aio_wfd; /* write file descriptor */
		175
		176	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		177
		178	#define EIO_REQ_MEMBERS \
		179	SV *callback; \
		180	SV *sv1, *sv2; \
		181	SV *sv3, *sv4; \
		182	STRLEN stroffset; \
		183	SV *self;
		184
		185	#define EIO_NO_WRAPPERS 1
		186
		187	#include "libeio/eio.h"
		188
		189	static int req_invoke (eio_req *req);
		190	#define EIO_FINISH(req) req_invoke (req)
		191	static void req_destroy (eio_req *grp);
		192	#define EIO_DESTROY(req) req_destroy (req)
		193
		194	#include "libeio/eio.c"
		195
		196	#if !HAVE_POSIX_FADVISE
		197	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		198	#endif
		199
		200	#if !HAVE_POSIX_MADVISE
		201	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		202	#endif
		203
		204	#ifndef MAP_ANONYMOUS
		205	# ifdef MAP_ANON
		206	# define MAP_ANONYMOUS MAP_ANON
		207	# else
		208	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
		209	# endif
		210	#endif
		211
		212	#ifndef makedev
		213	# define makedev(maj,min) (((maj) << 8) | (min))
		214	#endif
		215	#ifndef major
		216	# define major(dev) ((dev) >> 8)
		217	#endif
		218	#ifndef minor
		219	# define minor(dev) ((dev) & 0xff)
		220	#endif
		221
		222	/* solaris has a non-posix/unix compliant PAGESIZE that breaks compilation */
		223	#ifdef __sun
		224	# undef PAGESIZE
		225	#endif
		226
		227	#if PAGESIZE <= 0
		228	# define PAGESIZE sysconf (_SC_PAGESIZE)
		229	#endif
		230
		231	/*****************************************************************************/
		232
		233	#if !_POSIX_MAPPED_FILES
		234	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, (void *)-1)
		235	# define munmap(addr,length) EIO_ENOSYS ()
		236	#endif
		237
		238	#if !_POSIX_MEMORY_PROTECTION
		239	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		240	#endif
		241
		242	#if !MREMAP_MAYMOVE
		243	# define mremap(old_address,old_size,new_size,flags,new_address) (errno = ENOSYS, (void *)-1)
		244	#endif
		245
		246	#define FOREIGN_MAGIC PERL_MAGIC_ext
		247
		248	static int ecb_cold
		249	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		250	{
		251	int old_errno = errno;
		252	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		253	errno = old_errno;
		254
		255	mg->mg_obj = 0; /* just in case */
		256
		257	SvREADONLY_off (sv);
		258
		259	if (SvPVX (sv) != mg->mg_ptr)
		260	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		261
		262	SvCUR_set (sv, 0);
		263	SvPVX (sv) = 0;
		264	SvOK_off (sv);
		265
		266	return 0;
		267	}
		268
		269	static MGVTBL mmap_vtbl = {
		270	0, 0, 0, 0, mmap_free
		271	};
		272
		273	static int ecb_cold
		274	sysfree_free (pTHX_ SV *sv, MAGIC *mg)
		275	{
		276	free (mg->mg_ptr);
		277	mg->mg_obj = 0; /* just in case */
		278
		279	SvREADONLY_off (sv);
		280
		281	if (SvPVX (sv) != mg->mg_ptr)
		282	croak ("ERROR: IO::AIO mapped scalar changed location, detected");
		283
		284	SvCUR_set (sv, 0);
		285	SvPVX (sv) = 0;
		286	SvOK_off (sv);
		287
		288	return 0;
		289	}
		290
		291	static MGVTBL sysfree_vtbl = {
		292	0, 0, 0, 0, sysfree_free
		293	};
		294
		295	/*****************************************************************************/
		296
		297	/* helper: set scalar to foreign ptr with custom free */
		298	ecb_noinline
		299	static void
		300	sv_set_foreign (SV *sv, const MGVTBL *const vtbl, void *addr, IV length)
		301	{
		302	sv_force_normal (sv);
		303
		304	/* we store the length in mg_obj, as namlen is I32 :/ */
		305	sv_magicext (sv, 0, FOREIGN_MAGIC, vtbl, (char *)addr, 0)
		306	->mg_obj = (SV *)length;
		307
		308	SvUPGRADE (sv, SVt_PV); /* nop... */
		309
		310	if (SvLEN (sv))
		311	Safefree (SvPVX (sv));
		312
		313	SvPVX (sv) = (char *)addr;
		314	SvCUR_set (sv, length);
		315	SvLEN_set (sv, 0);
		316	SvPOK_only (sv);
		317	}
		318
		319	static void
		320	sv_clear_foreign (SV *sv)
		321	{
		322	/* todo: iterate over magic and only free ours, but of course */
		323	/* the perl5porters will call that (correct) behaviour buggy */
		324	sv_unmagic (sv, FOREIGN_MAGIC);
		325	}
		326
		327	/*****************************************************************************/
		328
		329	/* defines all sorts of constants to 0 unless they are already defined */
		330	/* also provides const_iv_ and const_niv_ macros for them */
		331	#include "def0.h"
		332
		333	/*****************************************************************************/
		334
		335	static void
		336	fiemap (eio_req *req)
		337	{
		338	req->result = -1;
		339
		340	#if HAVE_FIEMAP
		341	/* assume some c99 */
		342	struct fiemap *fiemap = 0;
		343	size_t end_offset;
		344	int count = req->int3;
		345
		346	req->flags |= EIO_FLAG_PTR1_FREE;
		347
		348	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		349	/* increase in 3.5kb steps */
		350	if (count < 0)
		351	count = 8;
		352
		353	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		354	errno = ENOMEM;
		355	if (!fiemap)
		356	return;
		357
		358	req->ptr1 = fiemap;
		359
		360	fiemap->fm_start = req->offs;
		361	fiemap->fm_length = req->size;
		362	fiemap->fm_flags = req->int2;
		363	fiemap->fm_extent_count = count;
		364
		365	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
		366	return;
		367
		368	if (req->int3 >= 0 /* not autosizing */
		369	|| !fiemap->fm_mapped_extents /* no more extents */
		370	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		371	goto done;
		372
		373	/* else we have to loop -
		374	* it would be tempting (actually I tried that first) to just query the
		375	* number of extents needed, but linux often feels like not returning all
		376	* extents, without telling us it left any out. this complicates
		377	* this quite a bit.
		378	*/
		379
		380	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
		381
		382	for (;;)
		383	{
		384	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
		385	char scratch[3072];
		386	struct fiemap *incmap = (struct fiemap *)scratch;
		387
		388	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
		389	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		390	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		391	incmap->fm_flags = fiemap->fm_flags;
		392	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
		393
		394	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
		395	return;
		396
		397	if (!incmap->fm_mapped_extents)
		398	goto done;
		399
		400	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		401	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		402	errno = ENOMEM;
		403	if (!fiemap)
		404	return;
		405
		406	req->ptr1 = fiemap;
		407
		408	for (count = 0; count < incmap->fm_mapped_extents; ++count)
		409	{
		410	struct fiemap_extent *e = incmap->fm_extents + count;
		411
		412	if (e->fe_logical + e->fe_length >= end_offset)
		413	goto done;
		414
		415	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		416
		417	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		418	goto done;
		419
		420	}
		421	}
		422
		423	done:
		424	req->result = 0;
		425
		426	#else
		427	errno = ENOSYS;
		428	#endif
		429	}
		430
		431	/*****************************************************************************/
		432
		433	static int close_fd; /* dummy fd to close fds via dup2 */
		434
		435	#if HAVE_STATX
		436	static struct statx stx;
		437	#define statx_offsetof(member) offsetof (struct statx, member)
		438	#define eio__statx statx
		439	#else
		440	#define statx_offsetof(member) 0
		441	#define eio__statx(dir,path,flags,mask,stx) EIO_ENOSYS()
28	#endif	442	#endif
29		443
30	enum {	444	enum {
31	REQ_QUIT,	445	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR, REQ_SYMLINK,
37	REQ_SYMLINK,
38	};	446	};
39		447
40	typedef struct aio_cb {
41	struct aio_cb *volatile next;
42
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	448	typedef eio_req *aio_req;
		449	typedef eio_req *aio_req_ornot;
		450	typedef eio_wd aio_wd;
59		451
60	static int started;	452	static SV *on_next_submit;
61	static volatile int nreqs;	453	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	454	static int max_outstanding;
63	static int respipe [2];
64		455
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	456	static s_epipe respipe;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		457
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	458	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */	459	static void req_cancel (aio_req req);
72		460
73	static void	461	static void
74	poll_wait ()	462	want_poll (void)
75	{	463	{
76	if (nreqs && !ress)	464	/* write a dummy byte to the pipe so fh becomes ready */
		465	s_epipe_signal (&respipe);
		466	}
		467
		468	static void
		469	done_poll (void)
		470	{
		471	/* read any signals sent by the worker threads */
		472	s_epipe_drain (&respipe);
		473	}
		474
		475	/* must be called at most once */
		476	ecb_noinline
		477	static SV *
		478	req_sv (aio_req req, HV *stash)
		479	{
		480	if (!req->self)
77	{	481	{
78	fd_set rfd;	482	req->self = (SV *)newHV ();
79	FD_ZERO(&rfd);	483	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80	FD_SET(respipe [0], &rfd);
81
82	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	484	}
		485
		486	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		487	}
		488
		489	static SV *
		490	newSVaio_wd (aio_wd wd)
		491	{
		492	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		493	}
		494
		495	ecb_noinline
		496	static aio_req
		497	SvAIO_REQ (SV *sv)
		498	{
		499	MAGIC *mg;
		500
		501	if (!SvROK (sv)
		502	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		503	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		504	&& SvSTASH (SvRV (sv)) != aio_req_stash
		505	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		506	croak ("object of class IO::AIO::REQ expected");
		507
		508	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		509
		510	return mg ? (aio_req)mg->mg_ptr : 0;
		511	}
		512
		513	static aio_wd
		514	SvAIO_WD (SV *sv)
		515	{
		516	if (!SvROK (sv)
		517	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		518	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		519	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		520
		521	return (aio_wd)(long)SvIVX (SvRV (sv));
		522	}
		523
		524	static SV *
		525	newmortalFH (int fd, int flags)
		526	{
		527	if (fd < 0)
		528	return &PL_sv_undef;
		529
		530	GV *gv = (GV *)sv_newmortal ();
		531	char sym[64];
		532	int symlen;
		533
		534	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		535	gv_init (gv, aio_stash, sym, symlen, 0);
		536
		537	symlen = snprintf (
		538	sym,
		539	sizeof (sym),
		540	"%s&=%d",
		541	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		542	fd
		543	);
		544
		545	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		546	? (SV *)gv : &PL_sv_undef;
		547	}
		548
		549	static void
		550	aio_grp_feed (aio_req grp)
		551	{
		552	if (grp->sv2 && SvOK (grp->sv2))
		553	{
		554	dSP;
		555
		556	ENTER;
		557	SAVETMPS;
		558	PUSHMARK (SP);
		559	XPUSHs (req_sv (grp, aio_grp_stash));
		560	PUTBACK;
		561	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		562	SPAGAIN;
		563	FREETMPS;
		564	LEAVE;
		565	}
		566	}
		567
		568	ecb_noinline
		569	static void
		570	req_submit (eio_req *req)
		571	{
		572	eio_submit (req);
		573
		574	if (expect_false (on_next_submit))
		575	{
		576	dSP;
		577	SV *cb = sv_2mortal (on_next_submit);
		578
		579	on_next_submit = 0;
		580
		581	PUSHMARK (SP);
		582	PUTBACK;
		583	call_sv (cb, G_DISCARD | G_EVAL);
		584	}
84	}	585	}
85		586
86	static int	587	static int
87	poll_cb ()	588	req_invoke (eio_req *req)
88	{	589	{
89	dSP;	590	if (req->flags & FLAG_SV2_RO_OFF)
90	int count = 0;	591	SvREADONLY_off (req->sv2);
91	aio_req req, prv;
92		592
93	pthread_mutex_lock (&reslock);	593	if (!EIO_CANCELLED (req) && req->callback)
94
95	{
96	/* read any signals sent by the worker threads */
97	char buf [32];
98	while (read (respipe [0], buf, 32) == 32)
99	;
100	}
101
102	req = ress;
103	ress = rese = 0;
104
105	pthread_mutex_unlock (&reslock);
106
107	while (req)
108	{	594	{
109	nreqs--;	595	dSP;
		596	static SV *sv_result_cache; /* caches the result integer SV */
		597	SV *sv_result;
110		598
111	if (req->type == REQ_QUIT)	599	ENTER;
112	started--;	600	SAVETMPS;
113	else	601	PUSHMARK (SP);
		602	EXTEND (SP, 1);
		603
		604	/* do not recreate the result IV from scratch each time */
		605	if (expect_true (sv_result_cache))
114	{	606	{
115	int errorno = errno;	607	sv_result = sv_result_cache; sv_result_cache = 0;
116	errno = req->errorno;	608	SvIV_set (sv_result, req->result);
117		609	SvIOK_only (sv_result);
118	if (req->type == REQ_READ)
119	SvCUR_set (req->data, req->dataoffset
120	+ req->result > 0 ? req->result : 0);
121
122	if (req->data)
123	SvREFCNT_dec (req->data);
124
125	if (req->fh)
126	SvREFCNT_dec (req->fh);
127
128	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
129	{
130	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131	PL_laststatval = req->result;
132	PL_statcache = *(req->statdata);
133
134	Safefree (req->statdata);
135	}
136
137	ENTER;
138	PUSHMARK (SP);
139	XPUSHs (sv_2mortal (newSViv (req->result)));
140
141	if (req->type == REQ_OPEN)
142	{
143	/* convert fd to fh */
144	SV *fh;
145
146	PUTBACK;
147	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
148	SPAGAIN;
149
150	fh = SvREFCNT_inc (POPs);
151
152	PUSHMARK (SP);
153	XPUSHs (sv_2mortal (fh));
154	}
155
156	if (SvOK (req->callback))
157	{
158	PUTBACK;
159	call_sv (req->callback, G_VOID | G_EVAL);
160	SPAGAIN;
161	}
162
163	LEAVE;
164
165	if (req->callback)
166	SvREFCNT_dec (req->callback);
167
168	errno = errorno;
169	count++;
170	}
171
172	prv = req;
173	req = req->next;
174	Safefree (prv);
175
176	/* TODO: croak on errors? */
177	}
178
179	return count;
180	}
181
182	static void *aio_proc(void *arg);
183
184	static void
185	start_thread (void)
186	{
187	sigset_t fullsigset, oldsigset;
188	pthread_t tid;
189	pthread_attr_t attr;
190
191	pthread_attr_init (&attr);
192	pthread_attr_setstacksize (&attr, STACKSIZE);
193	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
194
195	sigfillset (&fullsigset);
196	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
197
198	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
199	started++;
200
201	sigprocmask (SIG_SETMASK, &oldsigset, 0);
202	}
203
204	static void
205	send_req (aio_req req)
206	{
207	nreqs++;
208
209	pthread_mutex_lock (&reqlock);
210
211	req->next = 0;
212
213	if (reqe)
214	{
215	reqe->next = req;
216	reqe = req;
217	}
218	else
219	reqe = reqs = req;
220
221	pthread_cond_signal (&reqwait);
222	pthread_mutex_unlock (&reqlock);
223
224	while (nreqs > max_outstanding)
225	{
226	poll_wait ();
227	poll_cb ();
228	}
229	}
230
231	static void
232	end_thread (void)
233	{
234	aio_req req;
235	New (0, req, 1, aio_cb);
236	req->type = REQ_QUIT;
237
238	send_req (req);
239	}
240
241
242	static void min_parallel (int nthreads)
243	{
244	while (nthreads > started)
245	start_thread ();
246	}
247
248	static void max_parallel (int nthreads)
249	{
250	int cur = started;
251	while (cur > nthreads)
252	{
253	end_thread ();
254	cur--;
255	}
256
257	while (started > nthreads)
258	{
259	poll_wait ();
260	poll_cb ();
261	}
262	}
263
264	static int fork_started;
265
266	static void atfork_prepare (void)
267	{
268	pthread_mutex_lock (&frklock);
269
270	fork_started = started;
271
272	for (;;) {
273	while (nreqs)
274	{
275	poll_wait ();
276	poll_cb ();
277	}
278
279	max_parallel (0);
280
281	pthread_mutex_lock (&reqlock);
282
283	if (!nreqs && !started)
284	break;
285
286	pthread_mutex_unlock (&reqlock);
287
288	min_parallel (fork_started);
289	}
290
291	pthread_mutex_lock (&reslock);
292
293	assert (!started);
294	assert (!nreqs);
295	assert (!reqs && !reqe);
296	assert (!ress && !rese);
297	}
298
299	static void atfork_parent (void)
300	{
301	pthread_mutex_unlock (&reslock);
302	min_parallel (fork_started);
303	pthread_mutex_unlock (&reqlock);
304	pthread_mutex_unlock (&frklock);
305	}
306
307	static void atfork_child (void)
308	{
309	reqs = reqe = 0;
310
311	atfork_parent ();
312	}
313
314	/*****************************************************************************/
315	/* work around various missing functions */
316
317	#if !HAVE_PREADWRITE
318	# define pread aio_pread
319	# define pwrite aio_pwrite
320
321	/*
322	* make our pread/pwrite safe against themselves, but not against
323	* normal read/write by using a mutex. slows down execution a lot,
324	* but that's your problem, not mine.
325	*/
326	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
327
328	static ssize_t
329	pread (int fd, void *buf, size_t count, off_t offset)
330	{
331	ssize_t res;
332	off_t ooffset;
333
334	pthread_mutex_lock (&iolock);
335	ooffset = lseek (fd, 0, SEEK_CUR);
336	lseek (fd, offset, SEEK_SET);
337	res = read (fd, buf, count);
338	lseek (fd, ooffset, SEEK_SET);
339	pthread_mutex_unlock (&iolock);
340
341	return res;
342	}
343
344	static ssize_t
345	pwrite (int fd, void *buf, size_t count, off_t offset)
346	{
347	ssize_t res;
348	off_t ooffset;
349
350	pthread_mutex_lock (&iolock);
351	ooffset = lseek (fd, 0, SEEK_CUR);
352	lseek (fd, offset, SEEK_SET);
353	res = write (fd, buf, count);
354	lseek (fd, offset, SEEK_SET);
355	pthread_mutex_unlock (&iolock);
356
357	return res;
358	}
359	#endif
360
361	#if !HAVE_FDATASYNC
362	# define fdatasync fsync
363	#endif
364
365	#if !HAVE_READAHEAD
366	# define readahead aio_readahead
367
368	static char readahead_buf[4096];
369
370	static ssize_t
371	readahead (int fd, off_t offset, size_t count)
372	{
373	while (count > 0)
374	{
375	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
376
377	pread (fd, readahead_buf, len, offset);
378	offset += len;
379	count -= len;
380	}
381
382	errno = 0;
383	}
384	#endif
385
386	/*****************************************************************************/
387
388	static void *
389	aio_proc (void *thr_arg)
390	{
391	aio_req req;
392	int type;
393
394	do
395	{
396	pthread_mutex_lock (&reqlock);
397
398	for (;;)
399	{
400	req = reqs;
401
402	if (reqs)
403	{
404	reqs = reqs->next;
405	if (!reqs) reqe = 0;
406	}
407
408	if (req)
409	break;
410
411	pthread_cond_wait (&reqwait, &reqlock);
412	}
413
414	pthread_mutex_unlock (&reqlock);
415
416	errno = 0; /* strictly unnecessary */
417
418	type = req->type;
419
420	switch (type)
421	{
422	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
423	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
424
425	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
426
427	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
428	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
429	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430
431	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
432	case REQ_CLOSE: req->result = close (req->fd); break;
433	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
435	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
436
437	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438	case REQ_FSYNC: req->result = fsync (req->fd); break;
439
440	case REQ_QUIT:
441	break;
442
443	default:
444	req->result = ENOSYS;
445	break;
446	}
447
448	req->errorno = errno;
449
450	pthread_mutex_lock (&reslock);
451
452	req->next = 0;
453
454	if (rese)
455	{
456	rese->next = req;
457	rese = req;
458	}	610	}
459	else	611	else
460	{	612	{
461	rese = ress = req;	613	sv_result = newSViv (req->result);
462		614	SvREADONLY_on (sv_result);
463	/* write a dummy byte to the pipe so fh becomes ready */
464	write (respipe [1], &respipe, 1);
465	}	615	}
466		616
467	pthread_mutex_unlock (&reslock);	617	switch (req->type)
		618	{
		619	case EIO_WD_OPEN:
		620	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		621	break;
		622
		623	case EIO_READDIR:
		624	{
		625	SV *rv = &PL_sv_undef;
		626
		627	if (req->result >= 0)
		628	{
		629	int i;
		630	char *names = (char *)req->ptr2;
		631	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		632	AV *av = newAV ();
		633
		634	av_extend (av, req->result - 1);
		635
		636	for (i = 0; i < req->result; ++i)
		637	{
		638	if (req->int1 & EIO_READDIR_DENTS)
		639	{
		640	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		641
		642	if (req->int1 & EIO_READDIR_CUSTOM2)
		643	{
		644	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		645	AV *avent = newAV ();
		646
		647	av_extend (avent, 2);
		648
		649	if (!sv_type [ent->type])
		650	{
		651	sv_type [ent->type] = newSViv (ent->type);
		652	SvREADONLY_on (sv_type [ent->type]);
		653	}
		654
		655	av_store (avent, 0, namesv);
		656	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		657	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		658
		659	av_store (av, i, newRV_noinc ((SV *)avent));
		660	}
		661	else
		662	av_store (av, i, namesv);
		663
		664	++ent;
		665	}
		666	else
		667	{
		668	SV *name = newSVpv (names, 0);
		669	av_store (av, i, name);
		670	names += SvCUR (name) + 1;
		671	}
		672	}
		673
		674	rv = sv_2mortal (newRV_noinc ((SV *)av));
		675	}
		676
		677	PUSHs (rv);
		678
		679	if (req->int1 & EIO_READDIR_CUSTOM1)
		680	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		681	}
		682	break;
		683
		684	case EIO_OPEN:
		685	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		686	break;
		687
		688	case EIO_STATVFS:
		689	case EIO_FSTATVFS:
		690	{
		691	SV *rv = &PL_sv_undef;
		692
		693	#ifndef _WIN32
		694	if (req->result >= 0)
		695	{
		696	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		697	HV *hv = newHV ();
		698	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		699	* chooses to make it a struct.
		700	*/
		701	unsigned long fsid = 0;
		702	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		703
		704	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		705
		706	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		707	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		708	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		709	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		710	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		711	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		712	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		713	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		714	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		715	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		716	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		717	}
		718	#endif
		719
		720	PUSHs (rv);
		721	}
		722
		723	break;
		724
		725	case EIO_GROUP:
		726	req->int1 = 2; /* mark group as finished */
		727
		728	if (req->sv1)
		729	{
		730	int i;
		731	AV *av = (AV *)req->sv1;
		732
		733	EXTEND (SP, AvFILL (av) + 1);
		734	for (i = 0; i <= AvFILL (av); ++i)
		735	PUSHs (*av_fetch (av, i, 0));
		736	}
		737	break;
		738
		739	case EIO_NOP:
		740	case EIO_BUSY:
		741	break;
		742
		743	case EIO_READLINK:
		744	case EIO_REALPATH:
		745	if (req->result > 0)
		746	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		747	break;
		748
		749	case EIO_STAT:
		750	case EIO_LSTAT:
		751	case EIO_FSTAT:
		752	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		753
		754	if (!(PL_laststatval = req->result))
		755	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		756	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		757
		758	PUSHs (sv_result);
		759	break;
		760
		761	case EIO_SEEK:
		762	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		763	break;
		764
		765	case EIO_READ:
		766	{
		767	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		768	*SvEND (req->sv2) = 0;
		769	SvPOK_only (req->sv2);
		770	SvSETMAGIC (req->sv2);
		771	PUSHs (sv_result);
		772	}
		773	break;
		774
		775	case EIO_SLURP:
		776	{
		777	if (req->result >= 0)
		778	{
		779	/* if length was originally not known, we steal the malloc'ed memory */
		780	if (req->flags & EIO_FLAG_PTR2_FREE)
		781	{
		782	req->flags &= ~EIO_FLAG_PTR2_FREE;
		783	sv_set_foreign (req->sv2, &sysfree_vtbl, req->ptr2, req->result);
		784	}
		785	else
		786	{
		787	SvCUR_set (req->sv2, req->result);
		788	*SvEND (req->sv2) = 0;
		789	SvPOK_only (req->sv2);
		790	}
		791
		792	SvSETMAGIC (req->sv2);
		793	}
		794
		795	PUSHs (sv_result);
		796	}
		797	break;
		798
		799	case EIO_CUSTOM:
		800	if (req->feed == fiemap)
		801	{
		802	#if HAVE_FIEMAP
		803	if (!req->result)
		804	{
		805	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		806
		807	if (fiemap->fm_extent_count)
		808	{
		809	AV *av = newAV ();
		810	int i;
		811
		812	while (fiemap->fm_mapped_extents)
		813	{
		814	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		815	AV *ext_av = newAV ();
		816
		817	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		818	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		819	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		820	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		821
		822	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		823	}
		824
		825	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		826	}
		827	else
		828	{
		829	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		830	PUSHs (sv_result);
		831	}
		832	}
		833	#endif
		834	}
		835	else
		836	PUSHs (sv_result);
		837	break;
		838
		839	#if 0
		840	case EIO_CLOSE:
		841	PerlIOUnix_refcnt_dec (req->int1);
		842	break;
		843	#endif
		844
		845	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		846	if (req->result > 0)
		847	SvIV_set (sv_result, 0);
		848	/* FALLTHROUGH */
		849
		850	default:
		851	PUSHs (sv_result);
		852	break;
		853	}
		854
		855	errno = req->errorno;
		856
		857	PUTBACK;
		858	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		859	SPAGAIN;
		860
		861	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		862	SvREFCNT_dec (sv_result);
		863	else
		864	sv_result_cache = sv_result;
		865
		866	FREETMPS;
		867	LEAVE;
		868
		869	PUTBACK;
468	}	870	}
469	while (type != REQ_QUIT);
470		871
		872	return !!SvTRUE (ERRSV);
		873	}
		874
		875	static void
		876	req_destroy (aio_req req)
		877	{
		878	if (req->self)
		879	{
		880	sv_unmagic (req->self, PERL_MAGIC_ext);
		881	SvREFCNT_dec (req->self);
		882	}
		883
		884	SvREFCNT_dec (req->sv1);
		885	SvREFCNT_dec (req->sv2);
		886	SvREFCNT_dec (req->sv3);
		887	SvREFCNT_dec (req->sv4);
		888	SvREFCNT_dec (req->callback);
		889
		890	free (req);
		891	}
		892
		893	static void
		894	req_cancel_subs (aio_req grp)
		895	{
		896	if (grp->type != EIO_GROUP)
		897	return;
		898
		899	SvREFCNT_dec (grp->sv2);
		900	grp->sv2 = 0;
		901
		902	eio_grp_cancel (grp);
		903	}
		904
		905	ecb_cold
		906	static void
		907	create_respipe (void)
		908	{
		909	if (s_epipe_renew (&respipe))
		910	croak ("IO::AIO: unable to initialize result pipe");
		911	}
		912
		913	static void
		914	poll_wait (void)
		915	{
		916	while (eio_nreqs ())
		917	{
		918	int size;
		919
		920	X_LOCK (EIO_POOL->reslock);
		921	size = EIO_POOL->res_queue.size;
		922	X_UNLOCK (EIO_POOL->reslock);
		923
		924	if (size)
		925	return;
		926
		927	etp_maybe_start_thread (EIO_POOL);
		928
		929	s_epipe_wait (&respipe);
		930	}
		931	}
		932
		933	static int
		934	poll_cb (void)
		935	{
		936	for (;;)
		937	{
		938	int res = eio_poll ();
		939
		940	if (res > 0)
		941	croak (0);
		942
		943	if (!max_outstanding || max_outstanding > eio_nreqs ())
		944	return res;
		945
		946	poll_wait ();
		947	}
		948	}
		949
		950	ecb_cold
		951	static void
		952	reinit (void)
		953	{
		954	create_respipe ();
		955
		956	if (eio_init (want_poll, done_poll) < 0)
		957	croak ("IO::AIO: unable to initialise eio library");
		958	}
		959
		960	/*****************************************************************************/
		961
		962	static SV *
		963	get_cb (SV *cb_sv)
		964	{
		965	SvGETMAGIC (cb_sv);
		966	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		967	}
		968
		969	ecb_noinline
		970	static aio_req ecb_noinline
		971	dreq (SV *callback)
		972	{
		973	SV *cb_cv;
		974	aio_req req;
		975	int req_pri = next_pri;
		976	next_pri = EIO_PRI_DEFAULT;
		977
		978	cb_cv = get_cb (callback);
		979
		980	req = calloc (sizeof (*req), 1);
		981	if (!req)
		982	croak ("out of memory during eio_req allocation");
		983
		984	req->callback = SvREFCNT_inc (cb_cv);
		985	req->pri = req_pri;
		986
471	return 0;	987	return req;
472	}	988	}
473		989
474	#define dREQ \	990	#define dREQ \
475	aio_req req; \	991	aio_req req = dreq (callback); \
		992
		993	#define REQ_SEND \
		994	PUTBACK; \
		995	req_submit (req); \
		996	SPAGAIN; \
476	\	997	\
477	if (SvOK (callback) && !SvROK (callback)) \	998	if (GIMME_V != G_VOID) \
478	croak ("clalback must be undef or of reference type"); \	999	XPUSHs (req_sv (req, aio_req_stash));
479	\	1000
480	Newz (0, req, 1, aio_cb); \	1001	/* *wdsv, *pathsv, *wd and *ptr must be 0-initialized */
481	if (!req) \	1002	ecb_inline
482	croak ("out of memory during aio_req allocation"); \	1003	void
483	\	1004	req_set_path (SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
484	req->callback = SvREFCNT_inc (callback);	1005	{
485		1006	if (expect_false (SvROK (path)))
		1007	{
		1008	SV *rv = SvRV (path);
		1009	SV *wdob;
		1010
		1011	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		1012	{
		1013	path = AvARRAY (rv)[1];
		1014	wdob = AvARRAY (rv)[0];
		1015
		1016	if (SvOK (wdob))
		1017	{
		1018	*wd = SvAIO_WD (wdob);
		1019	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		1020	}
		1021	else
		1022	*wd = EIO_INVALID_WD;
		1023	}
		1024	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		1025	{
		1026	*wd = (aio_wd)(long)SvIVX (rv);
		1027	*wdsv = SvREFCNT_inc_NN (rv);
		1028	*ptr = ".";
		1029	return; /* path set to "." */
		1030	}
		1031	else
		1032	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		1033	}
		1034
		1035	*pathsv = newSVsv (path);
		1036	*ptr = SvPVbyte_nolen (*pathsv);
		1037	}
		1038
		1039	ecb_noinline
		1040	static void
		1041	req_set_path1 (aio_req req, SV *path)
		1042	{
		1043	req_set_path (path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		1044	}
		1045
		1046	ecb_noinline
		1047	static void
		1048	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		1049	{
		1050	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		1051
		1052	switch (SvTYPE (rv))
		1053	{
		1054	case SVt_PVIO:
		1055	case SVt_PVLV:
		1056	case SVt_PVGV:
		1057	req->type = type_fh;
		1058	req->sv1 = newSVsv (fh_or_path);
		1059	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1060	break;
		1061
		1062	default:
		1063	req->type = type_path;
		1064	req_set_path1 (req, fh_or_path);
		1065	break;
		1066	}
		1067	}
		1068
		1069	/*****************************************************************************/
		1070
		1071	static void
		1072	ts_set (struct timespec *ts, NV value)
		1073	{
		1074	ts->tv_sec = value;
		1075	ts->tv_nsec = (value - ts->tv_sec) * 1e9;
		1076	}
		1077
		1078	static NV
		1079	ts_get (const struct timespec *ts)
		1080	{
		1081	return ts->tv_sec + ts->tv_nsec * 1e-9;
		1082	}
		1083
		1084	/*****************************************************************************/
		1085
		1086	XS(boot_IO__AIO) ecb_cold;
		1087
486	MODULE = IO::AIO PACKAGE = IO::AIO	1088	MODULE = IO::AIO PACKAGE = IO::AIO
487		1089
488	PROTOTYPES: ENABLE	1090	PROTOTYPES: ENABLE
489		1091
490	BOOT:	1092	BOOT:
491	{	1093	{
492	if (pipe (respipe))	1094	static const struct {
493	croak ("unable to initialize result pipe");	1095	const char *name;
		1096	IV iv;
		1097	} *civ, const_iv[] = {
		1098	# define const_niv(name, value) { # name, (IV) value },
		1099	# define const_iv(name) { # name, (IV) name },
		1100	# define const_eio(name) { # name, (IV) EIO_ ## name },
494		1101
495	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1102	/* you have to re-run ./gendef0 after adding/removing any constants here */
496	croak ("cannot set result pipe to nonblocking mode");	1103	/* the first block can be undef if missing */
		1104	const_iv (ENOSYS)
		1105	const_iv (EXDEV)
		1106	const_iv (EBADR)
497		1107
498	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	1108	/* for lseek */
499	croak ("cannot set result pipe to nonblocking mode");	1109	const_iv (SEEK_DATA)
		1110	const_iv (SEEK_HOLE)
500		1111
501	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1112	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
502	}	1113	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		1114	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		1115	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		1116	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		1117	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
503		1118
		1119	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		1120	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		1121	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		1122	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		1123	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		1124
		1125	/* the second block will be 0 when missing */
		1126	const_iv (O_ACCMODE)
		1127
		1128	const_iv (O_RDONLY)
		1129	const_iv (O_WRONLY)
		1130	const_iv (O_RDWR)
		1131	const_iv (O_CREAT)
		1132	const_iv (O_TRUNC)
		1133	const_iv (O_EXCL)
		1134	const_iv (O_APPEND)
		1135
		1136	const_iv (O_ASYNC)
		1137	const_iv (O_DIRECT)
		1138	const_iv (O_NOATIME)
		1139
		1140	const_iv (O_CLOEXEC)
		1141	const_iv (O_NOCTTY)
		1142	const_iv (O_NOFOLLOW)
		1143	const_iv (O_NONBLOCK)
		1144	const_iv (O_EXEC)
		1145	const_iv (O_SEARCH)
		1146	const_iv (O_DIRECTORY)
		1147	const_iv (O_DSYNC)
		1148	const_iv (O_RSYNC)
		1149	const_iv (O_SYNC)
		1150	const_iv (O_PATH)
		1151	const_iv (O_TMPFILE)
		1152	const_iv (O_TTY_INIT)
		1153
		1154	const_iv (S_IFIFO)
		1155	const_iv (S_IFCHR)
		1156	const_iv (S_IFBLK)
		1157	const_iv (S_IFLNK)
		1158	const_iv (S_IFREG)
		1159	const_iv (S_IFDIR)
		1160	const_iv (S_IFWHT)
		1161	const_iv (S_IFSOCK)
		1162	const_iv (S_IFMT)
		1163
		1164	const_iv (ST_RDONLY)
		1165	const_iv (ST_NOSUID)
		1166	const_iv (ST_NODEV)
		1167	const_iv (ST_NOEXEC)
		1168	const_iv (ST_SYNCHRONOUS)
		1169	const_iv (ST_MANDLOCK)
		1170	const_iv (ST_WRITE)
		1171	const_iv (ST_APPEND)
		1172	const_iv (ST_IMMUTABLE)
		1173	const_iv (ST_NOATIME)
		1174	const_iv (ST_NODIRATIME)
		1175	const_iv (ST_RELATIME)
		1176
		1177	const_iv (PROT_NONE)
		1178	const_iv (PROT_EXEC)
		1179	const_iv (PROT_READ)
		1180	const_iv (PROT_WRITE)
		1181
		1182	const_iv (MAP_PRIVATE)
		1183	const_iv (MAP_SHARED)
		1184	const_iv (MAP_FIXED)
		1185	const_iv (MAP_ANONYMOUS)
		1186
		1187	/* linuxish */
		1188	const_iv (MAP_LOCKED)
		1189	const_iv (MAP_NORESERVE)
		1190	const_iv (MAP_POPULATE)
		1191	const_iv (MAP_NONBLOCK)
		1192	const_iv (MAP_GROWSDOWN)
		1193	const_iv (MAP_32BIT)
		1194	const_iv (MAP_HUGETLB)
		1195	const_iv (MAP_STACK)
		1196
		1197	const_iv (MREMAP_MAYMOVE)
		1198	const_iv (MREMAP_FIXED)
		1199
		1200	const_iv (MSG_CMSG_CLOEXEC)
		1201	const_iv (SOCK_CLOEXEC)
		1202
		1203	const_iv (F_DUPFD_CLOEXEC)
		1204
		1205	const_iv (F_ADD_SEALS)
		1206	const_iv (F_GET_SEALS)
		1207	const_iv (F_SEAL_SEAL)
		1208	const_iv (F_SEAL_SHRINK)
		1209	const_iv (F_SEAL_GROW)
		1210	const_iv (F_SEAL_WRITE)
		1211
		1212	const_iv (F_OFD_GETLK)
		1213	const_iv (F_OFD_SETLK)
		1214	const_iv (F_OFD_GETLKW)
		1215
		1216	const_iv (FIFREEZE)
		1217	const_iv (FITHAW)
		1218	const_iv (FITRIM)
		1219	const_iv (FICLONE)
		1220	const_iv (FICLONERANGE)
		1221	const_iv (FIDEDUPERANGE)
		1222
		1223	const_iv (FS_IOC_GETFLAGS)
		1224	const_iv (FS_IOC_SETFLAGS)
		1225	const_iv (FS_IOC_GETVERSION)
		1226	const_iv (FS_IOC_SETVERSION)
		1227	const_iv (FS_IOC_FIEMAP)
		1228	const_iv (FS_IOC_FSGETXATTR)
		1229	const_iv (FS_IOC_FSSETXATTR)
		1230	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1231	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1232	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
		1233
		1234	const_iv (FS_KEY_DESCRIPTOR_SIZE)
		1235
		1236	const_iv (FS_SECRM_FL)
		1237	const_iv (FS_UNRM_FL)
		1238	const_iv (FS_COMPR_FL)
		1239	const_iv (FS_SYNC_FL)
		1240	const_iv (FS_IMMUTABLE_FL)
		1241	const_iv (FS_APPEND_FL)
		1242	const_iv (FS_NODUMP_FL)
		1243	const_iv (FS_NOATIME_FL)
		1244	const_iv (FS_DIRTY_FL)
		1245	const_iv (FS_COMPRBLK_FL)
		1246	const_iv (FS_NOCOMP_FL)
		1247	const_iv (FS_ENCRYPT_FL)
		1248	const_iv (FS_BTREE_FL)
		1249	const_iv (FS_INDEX_FL)
		1250	const_iv (FS_JOURNAL_DATA_FL)
		1251	const_iv (FS_NOTAIL_FL)
		1252	const_iv (FS_DIRSYNC_FL)
		1253	const_iv (FS_TOPDIR_FL)
		1254	const_iv (FS_FL_USER_MODIFIABLE)
		1255
		1256	const_iv (FS_XFLAG_REALTIME)
		1257	const_iv (FS_XFLAG_PREALLOC)
		1258	const_iv (FS_XFLAG_IMMUTABLE)
		1259	const_iv (FS_XFLAG_APPEND)
		1260	const_iv (FS_XFLAG_SYNC)
		1261	const_iv (FS_XFLAG_NOATIME)
		1262	const_iv (FS_XFLAG_NODUMP)
		1263	const_iv (FS_XFLAG_RTINHERIT)
		1264	const_iv (FS_XFLAG_PROJINHERIT)
		1265	const_iv (FS_XFLAG_NOSYMLINKS)
		1266	const_iv (FS_XFLAG_EXTSIZE)
		1267	const_iv (FS_XFLAG_EXTSZINHERIT)
		1268	const_iv (FS_XFLAG_NODEFRAG)
		1269	const_iv (FS_XFLAG_FILESTREAM)
		1270	const_iv (FS_XFLAG_DAX)
		1271	const_iv (FS_XFLAG_HASATTR)
		1272
		1273	const_iv (FIEMAP_FLAG_SYNC)
		1274	const_iv (FIEMAP_FLAG_XATTR)
		1275	const_iv (FIEMAP_FLAGS_COMPAT)
		1276	const_iv (FIEMAP_EXTENT_LAST)
		1277	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1278	const_iv (FIEMAP_EXTENT_DELALLOC)
		1279	const_iv (FIEMAP_EXTENT_ENCODED)
		1280	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1281	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1282	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1283	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1284	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1285	const_iv (FIEMAP_EXTENT_MERGED)
		1286	const_iv (FIEMAP_EXTENT_SHARED)
		1287
		1288	const_iv (SPLICE_F_MOVE)
		1289	const_iv (SPLICE_F_NONBLOCK)
		1290	const_iv (SPLICE_F_MORE)
		1291	const_iv (SPLICE_F_GIFT)
		1292
		1293	const_iv (EFD_CLOEXEC)
		1294	const_iv (EFD_NONBLOCK)
		1295	const_iv (EFD_SEMAPHORE)
		1296
		1297	const_iv (MFD_CLOEXEC)
		1298	const_iv (MFD_ALLOW_SEALING)
		1299	const_iv (MFD_HUGETLB)
		1300
		1301	const_iv (CLOCK_REALTIME)
		1302	const_iv (CLOCK_MONOTONIC)
		1303	const_iv (CLOCK_BOOTTIME)
		1304	const_iv (CLOCK_REALTIME_ALARM)
		1305	const_iv (CLOCK_BOOTTIME_ALARM)
		1306
		1307	const_iv (TFD_NONBLOCK)
		1308	const_iv (TFD_CLOEXEC)
		1309
		1310	const_iv (TFD_TIMER_ABSTIME)
		1311	const_iv (TFD_TIMER_CANCEL_ON_SET)
		1312
		1313	const_iv (STATX_TYPE)
		1314	const_iv (STATX_MODE)
		1315	const_iv (STATX_NLINK)
		1316	const_iv (STATX_UID)
		1317	const_iv (STATX_GID)
		1318	const_iv (STATX_ATIME)
		1319	const_iv (STATX_MTIME)
		1320	const_iv (STATX_CTIME)
		1321	const_iv (STATX_INO)
		1322	const_iv (STATX_SIZE)
		1323	const_iv (STATX_BLOCKS)
		1324	const_iv (STATX_BASIC_STATS)
		1325	const_iv (STATX_ALL)
		1326	const_iv (STATX_BTIME)
		1327	const_iv (STATX_ATTR_COMPRESSED)
		1328	const_iv (STATX_ATTR_IMMUTABLE)
		1329	const_iv (STATX_ATTR_APPEND)
		1330	const_iv (STATX_ATTR_NODUMP)
		1331	const_iv (STATX_ATTR_ENCRYPTED)
		1332	const_iv (STATX_ATTR_AUTOMOUNT)
		1333
		1334	/* these are libeio constants, and are independent of gendef0 */
		1335	const_eio (SEEK_SET)
		1336	const_eio (SEEK_CUR)
		1337	const_eio (SEEK_END)
		1338
		1339	const_eio (MCL_FUTURE)
		1340	const_eio (MCL_CURRENT)
		1341	const_eio (MCL_ONFAULT)
		1342
		1343	const_eio (MS_ASYNC)
		1344	const_eio (MS_INVALIDATE)
		1345	const_eio (MS_SYNC)
		1346
		1347	const_eio (MT_MODIFY)
		1348
		1349	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1350	const_eio (SYNC_FILE_RANGE_WRITE)
		1351	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1352
		1353	const_eio (FALLOC_FL_KEEP_SIZE)
		1354	const_eio (FALLOC_FL_PUNCH_HOLE)
		1355	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1356	const_eio (FALLOC_FL_ZERO_RANGE)
		1357	const_eio (FALLOC_FL_INSERT_RANGE)
		1358	const_eio (FALLOC_FL_UNSHARE_RANGE)
		1359
		1360	const_eio (RENAME_NOREPLACE)
		1361	const_eio (RENAME_EXCHANGE)
		1362	const_eio (RENAME_WHITEOUT)
		1363
		1364	const_eio (READDIR_DENTS)
		1365	const_eio (READDIR_DIRS_FIRST)
		1366	const_eio (READDIR_STAT_ORDER)
		1367	const_eio (READDIR_FOUND_UNKNOWN)
		1368
		1369	const_eio (DT_UNKNOWN)
		1370	const_eio (DT_FIFO)
		1371	const_eio (DT_CHR)
		1372	const_eio (DT_DIR)
		1373	const_eio (DT_BLK)
		1374	const_eio (DT_REG)
		1375	const_eio (DT_LNK)
		1376	const_eio (DT_SOCK)
		1377	const_eio (DT_WHT)
		1378	};
		1379
		1380	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1381	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1382	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1383	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1384
		1385	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1386	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1387
		1388	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1389
		1390	/* allocate dummy pipe fd for aio_close */
		1391	{
		1392	int pipefd [2];
		1393
		1394	if (
		1395	#ifdef _WIN32
		1396	_pipe (pipefd, 1, _O_BINARY) < 0
		1397	#else
		1398	pipe (pipefd) < 0
		1399	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1400	#endif
		1401	|| close (pipefd [1]) < 0
		1402	)
		1403	croak ("IO::AIO: unable to create dummy pipe for aio_close");
		1404
		1405	close_fd = pipefd [0];
		1406	}
		1407
		1408	reinit ();
		1409	}
		1410
504	void	1411	void
505	min_parallel(nthreads)	1412	reinit ()
506	int nthreads	1413	PROTOTYPE:
		1414
		1415	void
		1416	max_poll_reqs (unsigned int nreqs)
507	PROTOTYPE: $	1417	PROTOTYPE: $
		1418	CODE:
		1419	eio_set_max_poll_reqs (nreqs);
508		1420
509	void	1421	void
510	max_parallel(nthreads)	1422	max_poll_time (double nseconds)
511	int nthreads
512	PROTOTYPE: $	1423	PROTOTYPE: $
513
514	int
515	max_outstanding(nreqs)
516	int nreqs
517	PROTOTYPE: $
518	CODE:	1424	CODE:
519	RETVAL = max_outstanding;	1425	eio_set_max_poll_time (nseconds);
		1426
		1427	void
		1428	min_parallel (unsigned int nthreads)
		1429	PROTOTYPE: $
		1430	CODE:
		1431	eio_set_min_parallel (nthreads);
		1432
		1433	void
		1434	max_parallel (unsigned int nthreads)
		1435	PROTOTYPE: $
		1436	CODE:
		1437	eio_set_max_parallel (nthreads);
		1438
		1439	void
		1440	max_idle (unsigned int nthreads)
		1441	PROTOTYPE: $
		1442	CODE:
		1443	eio_set_max_idle (nthreads);
		1444
		1445	void
		1446	idle_timeout (unsigned int seconds)
		1447	PROTOTYPE: $
		1448	CODE:
		1449	eio_set_idle_timeout (seconds);
		1450
		1451	void
		1452	max_outstanding (unsigned int maxreqs)
		1453	PROTOTYPE: $
		1454	CODE:
520	max_outstanding = nreqs;	1455	max_outstanding = maxreqs;
521		1456
522	void	1457	void
523	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1458	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
524	SV * pathname
525	int flags
526	int mode
527	SV * callback
528	PROTOTYPE: $$$;$
529	CODE:	1459	PPCODE:
530	{	1460	{
531	dREQ;	1461	dREQ;
532		1462
		1463	req->type = EIO_WD_OPEN;
		1464	req_set_path1 (req, pathname);
		1465
		1466	REQ_SEND;
		1467	}
		1468
		1469	void
		1470	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1471	PPCODE:
		1472	{
		1473	dREQ;
		1474
533	req->type = REQ_OPEN;	1475	req->type = EIO_OPEN;
534	req->data = newSVsv (pathname);	1476	req_set_path1 (req, pathname);
535	req->dataptr = SvPVbyte_nolen (req->data);
536	req->fd = flags;	1477	req->int1 = flags;
537	req->mode = mode;	1478	req->int2 = mode;
538		1479
539	send_req (req);	1480	REQ_SEND;
540	}	1481	}
541		1482
542	void	1483	void
543	aio_close(fh,callback=&PL_sv_undef)	1484	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
544	SV * fh
545	SV * callback
546	PROTOTYPE: $;$
547	ALIAS:	1485	ALIAS:
548	aio_close = REQ_CLOSE
549	aio_fsync = REQ_FSYNC	1486	aio_fsync = EIO_FSYNC
550	aio_fdatasync = REQ_FDATASYNC	1487	aio_fdatasync = EIO_FDATASYNC
		1488	aio_syncfs = EIO_SYNCFS
551	CODE:	1489	PPCODE:
552	{	1490	{
		1491	int fd = s_fileno_croak (fh, 0);
553	dREQ;	1492	dREQ;
554		1493
555	req->type = ix;	1494	req->type = ix;
556	req->fh = newSVsv (fh);	1495	req->sv1 = newSVsv (fh);
557	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1496	req->int1 = fd;
558		1497
559	send_req (req);	1498	REQ_SEND;
560	}	1499	}
561		1500
562	void	1501	void
		1502	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1503	PPCODE:
		1504	{
		1505	int fd = s_fileno_croak (fh, 0);
		1506	dREQ;
		1507
		1508	req->type = EIO_SYNC_FILE_RANGE;
		1509	req->sv1 = newSVsv (fh);
		1510	req->int1 = fd;
		1511	req->offs = offset;
		1512	req->size = nbytes;
		1513	req->int2 = flags;
		1514
		1515	REQ_SEND;
		1516	}
		1517
		1518	void
		1519	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1520	PPCODE:
		1521	{
		1522	int fd = s_fileno_croak (fh, 0);
		1523	dREQ;
		1524
		1525	req->type = EIO_FALLOCATE;
		1526	req->sv1 = newSVsv (fh);
		1527	req->int1 = fd;
		1528	req->int2 = mode;
		1529	req->offs = offset;
		1530	req->size = len;
		1531
		1532	REQ_SEND;
		1533	}
		1534
		1535	void
		1536	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1537	PPCODE:
		1538	{
		1539	int fd = s_fileno_croak (fh, 0);
		1540	dREQ;
		1541	#if 0
		1542	/* partially duplicate logic in s_fileno */
		1543	SvGETMAGIC (fh);
		1544
		1545	if (SvROK (fh))
		1546	{
		1547	fh = SvRV (fh);
		1548	SvGETMAGIC (fh);
		1549	}
		1550
		1551	if (SvTYPE (fh) == SVt_PVGV)
		1552	{
		1553	/* perl filehandle */
		1554	PerlIOUnix_refcnt_inc (fd);
		1555	do_close ((GV *)fh, 1);
		1556
		1557	req->type = EIO_CLOSE;
		1558	req->int1 = fd;
		1559	/*req->sv2 = newSVsv (fh);*/ /* since we stole the fd, no need to keep the fh */
		1560	}
		1561	else
		1562	#endif
		1563	{
		1564	/* fd number */
		1565	req->type = EIO_DUP2;
		1566	req->int1 = close_fd;
		1567	req->sv2 = newSVsv (fh);
		1568	req->int2 = fd;
		1569	}
		1570
		1571	REQ_SEND;
		1572	}
		1573
		1574	void
		1575	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
		1576	PPCODE:
		1577	{
		1578	int fd = s_fileno_croak (fh, 0);
		1579	dREQ;
		1580
		1581	req->type = EIO_SEEK;
		1582	req->sv1 = newSVsv (fh);
		1583	req->int1 = fd;
		1584	req->offs = SvVAL64 (offset);
		1585	req->int2 = whence;
		1586
		1587	REQ_SEND;
		1588	}
		1589
		1590	void
563	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1591	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
564	SV * fh
565	UV offset
566	IV length
567	SV * data
568	IV dataoffset
569	SV * callback
570	ALIAS:	1592	ALIAS:
571	aio_read = REQ_READ	1593	aio_read = EIO_READ
572	aio_write = REQ_WRITE	1594	aio_write = EIO_WRITE
573	PROTOTYPE: $$$$$;$
574	CODE:	1595	PPCODE:
575	{	1596	{
576	aio_req req;
577	STRLEN svlen;	1597	STRLEN svlen;
		1598	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
578	char *svptr = SvPVbyte (data, svlen);	1599	char *svptr = SvPVbyte (data, svlen);
579		1600	UV len = SvUV (length);
580	SvUPGRADE (data, SVt_PV);
581	SvPOK_on (data);
582		1601
583	if (dataoffset < 0)	1602	if (dataoffset < 0)
584	dataoffset += svlen;	1603	dataoffset += svlen;
585		1604
586	if (dataoffset < 0 || dataoffset > svlen)	1605	if (dataoffset < 0 || dataoffset > svlen)
587	croak ("data offset outside of string");	1606	croak ("dataoffset outside of data scalar");
588		1607
589	if (ix == REQ_WRITE)	1608	if (ix == EIO_WRITE)
590	{	1609	{
591	/* write: check length and adjust. */	1610	/* write: check length and adjust. */
592	if (length < 0 || length + dataoffset > svlen)	1611	if (!SvOK (length) || len + dataoffset > svlen)
593	length = svlen - dataoffset;	1612	len = svlen - dataoffset;
594	}	1613	}
595	else	1614	else
596	{	1615	{
597	/* read: grow scalar as necessary */	1616	/* read: check type and grow scalar as necessary */
		1617	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
598	svptr = SvGROW (data, length + dataoffset);	1618	svptr = sv_grow (data, len + dataoffset + 1);
		1619	else if (SvCUR (data) < len + dataoffset)
		1620	croak ("length + dataoffset outside of scalar, and cannot grow");
599	}	1621	}
600
601	if (length < 0)
602	croak ("length must not be negative");
603		1622
604	{	1623	{
605	dREQ;	1624	dREQ;
606		1625
607	req->type = ix;	1626	req->type = ix;
608	req->fh = newSVsv (fh);	1627	req->sv1 = newSVsv (fh);
609	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1628	req->int1 = fd;
610	: IoOFP (sv_2io (fh)));	1629	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
611	req->offset = offset;	1630	req->size = len;
612	req->length = length;
613	req->data = SvREFCNT_inc (data);	1631	req->sv2 = SvREFCNT_inc (data);
614	req->dataptr = (char *)svptr + dataoffset;	1632	req->ptr2 = (char *)svptr + dataoffset;
615	req->callback = SvREFCNT_inc (callback);	1633	req->stroffset = dataoffset;
616		1634
617	send_req (req);	1635	if (!SvREADONLY (data))
		1636	{
		1637	SvREADONLY_on (data);
		1638	req->flags |= FLAG_SV2_RO_OFF;
		1639	}
		1640
		1641	REQ_SEND;
618	}	1642	}
619	}	1643	}
620		1644
621	void	1645	void
622	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1646	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
623	SV * fh
624	UV offset
625	IV length
626	SV * callback
627	PROTOTYPE: $$$;$
628	CODE:
629	{
630	dREQ;
631
632	req->type = REQ_READAHEAD;
633	req->fh = newSVsv (fh);
634	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
635	req->offset = offset;
636	req->length = length;
637
638	send_req (req);
639	}
640
641	void
642	aio_stat(fh_or_path,callback=&PL_sv_undef)
643	SV * fh_or_path
644	SV * callback
645	ALIAS:	1647	ALIAS:
646	aio_stat = REQ_STAT	1648	aio_ioctl = EIO_IOCTL
647	aio_lstat = REQ_LSTAT	1649	aio_fcntl = EIO_FCNTL
648	CODE:	1650	PPCODE:
649	{	1651	{
650	dREQ;	1652	int fd = s_fileno_croak (fh, 0);
		1653	char *svptr;
651		1654
652	New (0, req->statdata, 1, Stat_t);	1655	if (SvPOK (arg) || !SvNIOK (arg))
653	if (!req->statdata)
654	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
655
656	if (SvPOK (fh_or_path))
657	{	1656	{
658	req->type = ix;	1657	STRLEN svlen;
659	req->data = newSVsv (fh_or_path);	1658	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
660	req->dataptr = SvPVbyte_nolen (req->data);	1659	#ifdef IOCPARM_LEN
		1660	STRLEN need = IOCPARM_LEN (request);
		1661	#else
		1662	STRLEN need = 256;
		1663	#endif
		1664
		1665	if (svlen < need)
		1666	svptr = SvGROW (arg, need);
661	}	1667	}
662	else	1668	else
		1669	svptr = (char *)SvIV (arg);
		1670
663	{	1671	{
		1672	dREQ;
		1673
664	req->type = REQ_FSTAT;	1674	req->type = ix;
665	req->fh = newSVsv (fh_or_path);	1675	req->sv1 = newSVsv (fh);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1676	req->int1 = fd;
		1677	req->int2 = (long)request;
		1678	req->sv2 = SvREFCNT_inc (arg);
		1679	req->ptr2 = svptr;
		1680
		1681	REQ_SEND;
667	}	1682	}
668
669	send_req (req);
670	}	1683	}
671		1684
672	void	1685	void
673	aio_unlink(pathname,callback=&PL_sv_undef)	1686	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
674	SV * pathname
675	SV * callback
676	ALIAS:	1687	ALIAS:
677	aio_unlink = REQ_UNLINK	1688	aio_readlink = EIO_READLINK
678	aio_rmdir = REQ_RMDIR	1689	aio_realpath = EIO_REALPATH
		1690	PPCODE:
		1691	{
		1692	dREQ;
		1693
		1694	req->type = ix;
		1695	req_set_path1 (req, pathname);
		1696
		1697	REQ_SEND;
		1698	}
		1699
		1700	void
		1701	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1702	PPCODE:
		1703	{
		1704	int ifd = s_fileno_croak (in_fh , 0);
		1705	int ofd = s_fileno_croak (out_fh, 1);
		1706	dREQ;
		1707
		1708	req->type = EIO_SENDFILE;
		1709	req->sv1 = newSVsv (out_fh);
		1710	req->int1 = ofd;
		1711	req->sv2 = newSVsv (in_fh);
		1712	req->int2 = ifd;
		1713	req->offs = in_offset;
		1714	req->size = length;
		1715
		1716	REQ_SEND;
		1717	}
		1718
		1719	void
		1720	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
		1721	PPCODE:
		1722	{
		1723	int fd = s_fileno_croak (fh, 0);
		1724	dREQ;
		1725
		1726	req->type = EIO_READAHEAD;
		1727	req->sv1 = newSVsv (fh);
		1728	req->int1 = fd;
		1729	req->offs = offset;
		1730	req->size = length;
		1731
		1732	REQ_SEND;
		1733	}
		1734
		1735	void
		1736	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
		1737	ALIAS:
		1738	aio_stat = EIO_STAT
		1739	aio_lstat = EIO_LSTAT
		1740	aio_statvfs = EIO_STATVFS
		1741	PPCODE:
		1742	{
		1743	dREQ;
		1744
		1745	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1746
		1747	REQ_SEND;
		1748	}
		1749
		1750	void
		1751	st_xtime ()
		1752	ALIAS:
		1753	st_atime = 0x01
		1754	st_mtime = 0x02
		1755	st_ctime = 0x04
		1756	st_btime = 0x08
		1757	st_xtime = 0x0f
		1758	PPCODE:
		1759	EXTEND (SP, 4);
		1760	if (ix & 0x01) PUSHs (newSVnv (PL_statcache.st_atime + 1e-9 * ATIMENSEC));
		1761	if (ix & 0x02) PUSHs (newSVnv (PL_statcache.st_mtime + 1e-9 * MTIMENSEC));
		1762	if (ix & 0x04) PUSHs (newSVnv (PL_statcache.st_ctime + 1e-9 * CTIMENSEC));
		1763	if (ix & 0x08) PUSHs (newSVnv (BTIMESEC + 1e-9 * BTIMENSEC));
		1764
		1765	void
		1766	st_xtimensec ()
		1767	ALIAS:
		1768	st_atimensec = 0x01
		1769	st_mtimensec = 0x02
		1770	st_ctimensec = 0x04
		1771	st_btimensec = 0x08
		1772	st_xtimensec = 0x0f
		1773	st_btimesec = 0x10
		1774	st_gen = 0x20
		1775	PPCODE:
		1776	EXTEND (SP, 4);
		1777	if (ix & 0x01) PUSHs (newSViv (ATIMENSEC));
		1778	if (ix & 0x02) PUSHs (newSViv (MTIMENSEC));
		1779	if (ix & 0x04) PUSHs (newSViv (CTIMENSEC));
		1780	if (ix & 0x08) PUSHs (newSViv (BTIMENSEC));
		1781	if (ix & 0x10) PUSHs (newSVuv (BTIMESEC));
		1782	if (ix & 0x20) PUSHs (newSVuv (ST_GEN));
		1783
		1784	UV
		1785	major (UV dev)
		1786	ALIAS:
		1787	minor = 1
679	CODE:	1788	CODE:
		1789	RETVAL = ix ? minor (dev) : major (dev);
		1790	OUTPUT:
		1791	RETVAL
		1792
		1793	UV
		1794	makedev (UV maj, UV min)
		1795	CODE:
		1796	RETVAL = makedev (maj, min);
		1797	OUTPUT:
		1798	RETVAL
		1799
		1800	void
		1801	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1802	PPCODE:
		1803	{
		1804	dREQ;
		1805
		1806	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1807	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1808	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1809
		1810	REQ_SEND;
		1811	}
		1812
		1813	void
		1814	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1815	PPCODE:
		1816	{
		1817	dREQ;
		1818
		1819	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1820	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1821
		1822	REQ_SEND;
		1823	}
		1824
		1825	void
		1826	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1827	PPCODE:
		1828	{
		1829	dREQ;
		1830
		1831	req->int2 = mode;
		1832	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1833
		1834	REQ_SEND;
		1835	}
		1836
		1837	void
		1838	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1839	PPCODE:
		1840	{
		1841	dREQ;
		1842
		1843	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1844	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1845	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1846
		1847	REQ_SEND;
		1848	}
		1849
		1850	void
		1851	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1852	PPCODE:
		1853	{
		1854	dREQ;
		1855
		1856	req->type = EIO_READDIR;
		1857	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1858
		1859	if (flags & EIO_READDIR_DENTS)
		1860	req->int1 |= EIO_READDIR_CUSTOM2;
		1861
		1862	req_set_path1 (req, pathname);
		1863
		1864	REQ_SEND;
		1865	}
		1866
		1867	void
		1868	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1869	PPCODE:
		1870	{
		1871	dREQ;
		1872
		1873	req->type = EIO_MKDIR;
		1874	req->int2 = mode;
		1875	req_set_path1 (req, pathname);
		1876
		1877	REQ_SEND;
		1878	}
		1879
		1880	void
		1881	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1882	ALIAS:
		1883	aio_unlink = EIO_UNLINK
		1884	aio_rmdir = EIO_RMDIR
		1885	aio_readdir = EIO_READDIR
		1886	PPCODE:
680	{	1887	{
681	dREQ;	1888	dREQ;
682		1889
683	req->type = ix;	1890	req->type = ix;
684	req->data = newSVsv (pathname);	1891	req_set_path1 (req, pathname);
685	req->dataptr = SvPVbyte_nolen (req->data);
686
687	send_req (req);
688	}
689		1892
		1893	REQ_SEND;
		1894	}
		1895
690	void	1896	void
691	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1897	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
692	SV * oldpath	1898	ALIAS:
693	SV * newpath	1899	aio_link = EIO_LINK
694	SV * callback	1900	aio_symlink = EIO_SYMLINK
		1901	aio_rename = EIO_RENAME
695	CODE:	1902	PPCODE:
696	{	1903	{
		1904	eio_wd wd2 = 0;
697	dREQ;	1905	dREQ;
698		1906
699	req->type = REQ_SYMLINK;	1907	req->type = ix;
700	req->fh = newSVsv (oldpath);	1908	req_set_path1 (req, oldpath);
701	req->data2ptr = SvPVbyte_nolen (req->fh);	1909	req_set_path (newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
702	req->data = newSVsv (newpath);	1910	req->int3 = (long)wd2;
703	req->dataptr = SvPVbyte_nolen (req->data);
704		1911
705	send_req (req);	1912	REQ_SEND;
706	}	1913	}
707		1914
708	void	1915	void
709	flush()	1916	aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
710	PROTOTYPE:	1917	PPCODE:
		1918	{
		1919	eio_wd wd2 = 0;
		1920	dREQ;
		1921
		1922	req->type = EIO_RENAME;
		1923	req_set_path1 (req, oldpath);
		1924	req_set_path (newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1925	req->int2 = flags;
		1926	req->int3 = (long)wd2;
		1927
		1928	REQ_SEND;
		1929	}
		1930
		1931	void
		1932	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
		1933	PPCODE:
		1934	{
		1935	dREQ;
		1936
		1937	req->type = EIO_MKNOD;
		1938	req->int2 = (mode_t)mode;
		1939	req->offs = dev;
		1940	req_set_path1 (req, pathname);
		1941
		1942	REQ_SEND;
		1943	}
		1944
		1945	void
		1946	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
		1947	ALIAS:
		1948	aio_mtouch = EIO_MTOUCH
		1949	aio_msync = EIO_MSYNC
		1950	PPCODE:
		1951	{
		1952	STRLEN svlen;
		1953	char *svptr = SvPVbyte (data, svlen);
		1954	UV len = SvUV (length);
		1955
		1956	if (flags < 0)
		1957	flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
		1958
		1959	if (offset < 0)
		1960	offset += svlen;
		1961
		1962	if (offset < 0 || offset > svlen)
		1963	croak ("offset outside of scalar");
		1964
		1965	if (!SvOK (length) || len + offset > svlen)
		1966	len = svlen - offset;
		1967
		1968	{
		1969	dREQ;
		1970
		1971	req->type = ix;
		1972	req->sv2 = SvREFCNT_inc (data);
		1973	req->ptr2 = (char *)svptr + offset;
		1974	req->size = len;
		1975	req->int1 = flags;
		1976
		1977	REQ_SEND;
		1978	}
		1979	}
		1980
		1981	void
		1982	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1983	PPCODE:
		1984	{
		1985	STRLEN svlen;
		1986	char *svptr = SvPVbyte (data, svlen);
		1987	UV len = SvUV (length);
		1988
		1989	if (offset < 0)
		1990	offset += svlen;
		1991
		1992	if (offset < 0 || offset > svlen)
		1993	croak ("offset outside of scalar");
		1994
		1995	if (!SvOK (length) || len + offset > svlen)
		1996	len = svlen - offset;
		1997
		1998	{
		1999	dREQ;
		2000
		2001	req->type = EIO_MLOCK;
		2002	req->sv2 = SvREFCNT_inc (data);
		2003	req->ptr2 = (char *)svptr + offset;
		2004	req->size = len;
		2005
		2006	REQ_SEND;
		2007	}
		2008	}
		2009
		2010	void
		2011	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		2012	PPCODE:
		2013	{
		2014	dREQ;
		2015
		2016	req->type = EIO_MLOCKALL;
		2017	req->int1 = flags;
		2018
		2019	REQ_SEND;
		2020	}
		2021
		2022	void
		2023	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		2024	PPCODE:
		2025	{
		2026	int fd = s_fileno_croak (fh, 0);
		2027	dREQ;
		2028
		2029	req->type = EIO_CUSTOM;
		2030	req->sv1 = newSVsv (fh);
		2031	req->int1 = fd;
		2032
		2033	req->feed = fiemap;
		2034	#if HAVE_FIEMAP
		2035	/* keep our fingers crossed that the next two types are 64 bit */
		2036	req->offs = start;
		2037	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		2038	req->int2 = flags;
		2039	req->int3 = SvOK (count) ? SvIV (count) : -1;
		2040	#endif
		2041
		2042	REQ_SEND;
		2043	}
		2044
		2045	void
		2046	aio_slurp (SV *pathname, off_t offset, UV length, SV8 *data, SV *callback = &PL_sv_undef)
		2047	PPCODE:
		2048	{
		2049	char *svptr = 0;
		2050
		2051	sv_clear_foreign (data);
		2052
		2053	if (length) /* known length, directly read into scalar */
		2054	{
		2055	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
		2056	svptr = sv_grow (data, length + 1);
		2057	else if (SvCUR (data) < length)
		2058	croak ("length outside of scalar, and cannot grow");
		2059	else
		2060	svptr = SvPVbyte_nolen (data);
		2061	}
		2062
		2063	{
		2064	dREQ;
		2065
		2066	req->type = EIO_SLURP;
		2067	req_set_path1 (req, pathname);
		2068	req->offs = offset;
		2069	req->size = length;
		2070	req->sv2 = SvREFCNT_inc (data);
		2071	req->ptr2 = svptr;
		2072
		2073	if (!SvREADONLY (data))
		2074	{
		2075	SvREADONLY_on (data);
		2076	req->flags |= FLAG_SV2_RO_OFF;
		2077	}
		2078
		2079	REQ_SEND;
		2080	}
		2081	}
		2082
		2083	void
		2084	aio_busy (double delay, SV *callback = &PL_sv_undef)
		2085	PPCODE:
		2086	{
		2087	dREQ;
		2088
		2089	req->type = EIO_BUSY;
		2090	req->nv1 = delay < 0. ? 0. : delay;
		2091
		2092	REQ_SEND;
		2093	}
		2094
		2095	void
		2096	aio_group (SV *callback = &PL_sv_undef)
		2097	PPCODE:
		2098	{
		2099	dREQ;
		2100
		2101	req->type = EIO_GROUP;
		2102
		2103	PUTBACK;
		2104	req_submit (req);
		2105	SPAGAIN;
		2106
		2107	XPUSHs (req_sv (req, aio_grp_stash));
		2108	}
		2109
		2110	void
		2111	aio_nop (SV *callback = &PL_sv_undef)
		2112	ALIAS:
		2113	aio_nop = EIO_NOP
		2114	aio_sync = EIO_SYNC
		2115	PPCODE:
		2116	{
		2117	dREQ;
		2118
		2119	req->type = ix;
		2120
		2121	REQ_SEND;
		2122	}
		2123
		2124	int
		2125	aioreq_pri (int pri = NO_INIT)
711	CODE:	2126	CODE:
		2127	RETVAL = next_pri;
		2128	if (items > 0)
		2129	{
		2130	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		2131	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		2132	next_pri = pri;
		2133	}
		2134	OUTPUT:
		2135	RETVAL
		2136
		2137	void
		2138	aioreq_nice (int nice = 0)
		2139	CODE:
		2140	nice = next_pri - nice;
		2141	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		2142	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		2143	next_pri = nice;
		2144
		2145	void
		2146	flush ()
		2147	CODE:
712	while (nreqs)	2148	while (eio_nreqs ())
713	{	2149	{
714	poll_wait ();	2150	poll_wait ();
715	poll_cb ();	2151	poll_cb ();
716	}	2152	}
717		2153
718	void	2154	int
719	poll()	2155	poll ()
720	PROTOTYPE:
721	CODE:	2156	CODE:
722	if (nreqs)
723	{
724	poll_wait ();	2157	poll_wait ();
725	poll_cb ();	2158	RETVAL = poll_cb ();
726	}
727
728	int
729	poll_fileno()
730	PROTOTYPE:
731	CODE:
732	RETVAL = respipe [0];
733	OUTPUT:	2159	OUTPUT:
734	RETVAL	2160	RETVAL
735		2161
736	int	2162	int
		2163	poll_fileno ()
		2164	CODE:
		2165	RETVAL = s_epipe_fd (&respipe);
		2166	OUTPUT:
		2167	RETVAL
		2168
		2169	int
737	poll_cb(...)	2170	poll_cb (...)
738	PROTOTYPE:	2171	PROTOTYPE:
739	CODE:	2172	CODE:
740	RETVAL = poll_cb ();	2173	RETVAL = poll_cb ();
741	OUTPUT:	2174	OUTPUT:
742	RETVAL	2175	RETVAL
743		2176
744	void	2177	void
745	poll_wait()	2178	poll_wait ()
		2179	CODE:
		2180	poll_wait ();
		2181
		2182	int
		2183	nreqs ()
		2184	CODE:
		2185	RETVAL = eio_nreqs ();
		2186	OUTPUT:
		2187	RETVAL
		2188
		2189	int
		2190	nready ()
		2191	CODE:
		2192	RETVAL = eio_nready ();
		2193	OUTPUT:
		2194	RETVAL
		2195
		2196	int
		2197	npending ()
		2198	CODE:
		2199	RETVAL = eio_npending ();
		2200	OUTPUT:
		2201	RETVAL
		2202
		2203	int
		2204	nthreads ()
		2205	CODE:
		2206	RETVAL = eio_nthreads ();
		2207	OUTPUT:
		2208	RETVAL
		2209
		2210	int
		2211	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		2212	CODE:
		2213	RETVAL = posix_fadvise (fh, offset, length, advice);
		2214	OUTPUT:
		2215	RETVAL
		2216
		2217	IV
		2218	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		2219	CODE:
		2220	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		2221	OUTPUT:
		2222	RETVAL
		2223
		2224	void
		2225	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		2226	PPCODE:
		2227	sv_clear_foreign (scalar);
		2228	{
		2229	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		2230	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		2231	if (addr == (void *)-1)
		2232	XSRETURN_NO;
		2233
		2234	sv_set_foreign (scalar, &mmap_vtbl, addr, length);
		2235
		2236	if (!(prot & PROT_WRITE))
		2237	SvREADONLY_on (scalar);
		2238
		2239	XSRETURN_YES;
		2240	}
		2241
		2242	void
		2243	munmap (SV *scalar)
		2244	CODE:
		2245	sv_clear_foreign (scalar);
		2246
		2247	SV *
		2248	mremap (SV *scalar, STRLEN new_length, int flags = MREMAP_MAYMOVE, IV new_address = 0)
		2249	CODE:
		2250	{
		2251	MAGIC *mg = mg_findext (scalar, FOREIGN_MAGIC, &mmap_vtbl);
		2252	void *new;
		2253
		2254	if (!mg || SvPVX (scalar) != mg->mg_ptr)
		2255	croak ("IO::AIO::mremap: scalar not mapped by IO::AIO::mmap or improperly modified");
		2256
		2257	new = mremap (mg->mg_ptr, (size_t)mg->mg_obj, new_length, flags, (void *)new_address);
		2258
		2259	RETVAL = &PL_sv_no;
		2260
		2261	if (new != (void *)-1)
		2262	{
		2263	RETVAL = new == (void *)mg->mg_ptr
		2264	? newSVpvn ("0 but true", 10)
		2265	: &PL_sv_yes;
		2266
		2267	mg->mg_ptr = (char *)new;
		2268	mg->mg_obj = (SV *)new_length;
		2269
		2270	SvPVX (scalar) = mg->mg_ptr;
		2271	SvCUR_set (scalar, new_length);
		2272	}
		2273	}
		2274	OUTPUT:
		2275	RETVAL
		2276
		2277	int
		2278	madvise (SV *scalar, IV offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		2279	ALIAS:
		2280	mprotect = 1
		2281	CODE:
		2282	{
		2283	STRLEN svlen;
		2284	void *addr = SvPVbyte (scalar, svlen);
		2285	STRLEN len = SvUV (length);
		2286
		2287	if (offset < 0)
		2288	offset += svlen;
		2289
		2290	if (offset < 0 || offset > svlen)
		2291	croak ("offset outside of scalar");
		2292
		2293	if (!SvOK (length) || len + offset > svlen)
		2294	len = svlen - offset;
		2295
		2296	addr = (void *)(((intptr_t)addr) + offset);
		2297	eio_page_align (&addr, &len);
		2298
		2299	switch (ix)
		2300	{
		2301	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		2302	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		2303	}
		2304	}
		2305	OUTPUT:
		2306	RETVAL
		2307
		2308	int
		2309	munlock (SV *scalar, IV offset = 0, SV *length = &PL_sv_undef)
		2310	CODE:
		2311	{
		2312	STRLEN svlen;
		2313	void *addr = SvPVbyte (scalar, svlen);
		2314	size_t len = SvUV (length);
		2315
		2316	if (offset < 0)
		2317	offset += svlen;
		2318
		2319	if (offset < 0 || offset > svlen)
		2320	croak ("offset outside of scalar");
		2321
		2322	if (!SvOK (length) || len + offset > svlen)
		2323	len = svlen - offset;
		2324
		2325	addr = (void *)(((intptr_t)addr) + offset);
		2326	eio_page_align (&addr, &len);
		2327	#if _POSIX_MEMLOCK_RANGE
		2328	RETVAL = munlock (addr, len);
		2329	#else
		2330	RETVAL = EIO_ENOSYS ();
		2331	#endif
		2332	}
		2333	OUTPUT:
		2334	RETVAL
		2335
		2336	int
		2337	mlockall (int flags)
		2338	PROTOTYPE: $;
		2339	CODE:
		2340	RETVAL = eio_mlockall_sync (flags);
		2341	OUTPUT:
		2342	RETVAL
		2343
		2344	int
		2345	munlockall ()
		2346	CODE:
		2347	#if _POSIX_MEMLOCK
		2348	munlockall ();
		2349	#else
		2350	RETVAL = EIO_ENOSYS ();
		2351	#endif
		2352	OUTPUT:
		2353	RETVAL
		2354
		2355	int
		2356	statx (SV8 *pathname, int flags, UV mask)
		2357	CODE:
		2358	{
		2359	/* undocumented, and might go away, and anyway, should use eio_statx */
		2360	SV *wdsv = 0;
		2361	SV *pathsv = 0;
		2362	eio_wd wd = EIO_CWD;
		2363	void *ptr;
		2364	int res;
		2365
		2366	req_set_path (pathname, &wdsv, &pathsv, &wd, &ptr);
		2367	RETVAL = eio__statx (!wd || wd->fd == EIO_CWD ? AT_FDCWD : wd->fd, ptr, flags, mask & STATX_ALL, &stx);
		2368
		2369	SvREFCNT_dec (pathsv);
		2370	SvREFCNT_dec (wdsv);
		2371	}
		2372	OUTPUT:
		2373	RETVAL
		2374
		2375	U32
		2376	stx_mode ()
746	PROTOTYPE:	2377	PROTOTYPE:
747	CODE:	2378	CODE:
		2379	#if HAVE_STATX
		2380	RETVAL = stx.stx_mode;
		2381	#else
		2382	XSRETURN_UNDEF;
		2383	#endif
		2384	OUTPUT:
		2385	RETVAL
		2386
		2387	#define STATX_OFFSET_mask statx_offsetof (stx_mask)
		2388	#define STATX_OFFSET_blksize statx_offsetof (stx_blksize)
		2389	#define STATX_OFFSET_nlink statx_offsetof (stx_nlink)
		2390	#define STATX_OFFSET_uid statx_offsetof (stx_uid)
		2391	#define STATX_OFFSET_gid statx_offsetof (stx_gid)
		2392	#define STATX_OFFSET_rdev_major statx_offsetof (stx_rdev_major)
		2393	#define STATX_OFFSET_rdev_minor statx_offsetof (stx_rdev_minor)
		2394	#define STATX_OFFSET_dev_major statx_offsetof (stx_dev_major)
		2395	#define STATX_OFFSET_dev_minor statx_offsetof (stx_dev_minor)
		2396	#define STATX_OFFSET_attributes statx_offsetof (stx_attributes)
		2397	#define STATX_OFFSET_ino statx_offsetof (stx_ino)
		2398	#define STATX_OFFSET_size statx_offsetof (stx_size)
		2399	#define STATX_OFFSET_blocks statx_offsetof (stx_blocks)
		2400	#define STATX_OFFSET_attributes_mask statx_offsetof (stx_attributes_mask)
		2401	#define STATX_OFFSET_atime statx_offsetof (stx_atime)
		2402	#define STATX_OFFSET_btime statx_offsetof (stx_btime)
		2403	#define STATX_OFFSET_ctime statx_offsetof (stx_ctime)
		2404	#define STATX_OFFSET_mtime statx_offsetof (stx_mtime)
		2405
		2406	U32
		2407	stx_mask ()
		2408	PROTOTYPE:
		2409	ALIAS:
		2410	stx_mask = STATX_OFFSET_mask
		2411	stx_blksize = STATX_OFFSET_blksize
		2412	stx_nlink = STATX_OFFSET_nlink
		2413	stx_uid = STATX_OFFSET_uid
		2414	stx_gid = STATX_OFFSET_gid
		2415	stx_rdev_major = STATX_OFFSET_rdev_major
		2416	stx_rdev_minor = STATX_OFFSET_rdev_minor
		2417	stx_dev_major = STATX_OFFSET_dev_major
		2418	stx_dev_minor = STATX_OFFSET_dev_minor
		2419	CODE:
		2420	#if HAVE_STATX
		2421	RETVAL = *(__u32 *)((char *)&stx + ix);
		2422	#else
		2423	XSRETURN_UNDEF;
		2424	#endif
		2425	OUTPUT:
		2426	RETVAL
		2427
		2428	VAL64
		2429	stx_attributes ()
		2430	PROTOTYPE:
		2431	ALIAS:
		2432	stx_attributes = STATX_OFFSET_attributes
		2433	stx_ino = STATX_OFFSET_ino
		2434	stx_size = STATX_OFFSET_size
		2435	stx_blocks = STATX_OFFSET_blocks
		2436	stx_attributes_mask = STATX_OFFSET_attributes_mask
		2437	CODE:
		2438	#if HAVE_STATX
		2439	RETVAL = *(__u64 *)((char *)&stx + ix);
		2440	#else
		2441	XSRETURN_UNDEF;
		2442	#endif
		2443	OUTPUT:
		2444	RETVAL
		2445
		2446	NV
		2447	stx_atime ()
		2448	PROTOTYPE:
		2449	ALIAS:
		2450	stx_atime = STATX_OFFSET_atime
		2451	stx_btime = STATX_OFFSET_btime
		2452	stx_ctime = STATX_OFFSET_ctime
		2453	stx_mtime = STATX_OFFSET_mtime
		2454	CODE:
		2455	#if HAVE_STATX
		2456	struct statx_timestamp *ts = (struct statx_timestamp *)((char *)&stx + ix);
		2457	RETVAL = ts->tv_sec + ts->tv_nsec * 1e-9;
		2458	#else
		2459	XSRETURN_UNDEF;
		2460	#endif
		2461	OUTPUT:
		2462	RETVAL
		2463
		2464	VAL64
		2465	stx_atimesec ()
		2466	PROTOTYPE:
		2467	ALIAS:
		2468	stx_atimesec = STATX_OFFSET_atime
		2469	stx_btimesec = STATX_OFFSET_btime
		2470	stx_ctimesec = STATX_OFFSET_ctime
		2471	stx_mtimesec = STATX_OFFSET_mtime
		2472	CODE:
		2473	#if HAVE_STATX
		2474	struct statx_timestamp *ts = (struct statx_timestamp *)((char *)&stx + ix);
		2475	RETVAL = ts->tv_sec;
		2476	#else
		2477	XSRETURN_UNDEF;
		2478	#endif
		2479	OUTPUT:
		2480	RETVAL
		2481
		2482	U32
		2483	stx_atimensec ()
		2484	PROTOTYPE:
		2485	ALIAS:
		2486	stx_atimensec = STATX_OFFSET_atime
		2487	stx_btimensec = STATX_OFFSET_btime
		2488	stx_ctimensec = STATX_OFFSET_ctime
		2489	stx_mtimensec = STATX_OFFSET_mtime
		2490	CODE:
		2491	#if HAVE_STATX
		2492	struct statx_timestamp *ts = (struct statx_timestamp *)((char *)&stx + ix);
		2493	RETVAL = ts->tv_nsec;
		2494	#else
		2495	RETVAL = 0;
		2496	#endif
		2497	OUTPUT:
		2498	RETVAL
		2499
		2500	void
		2501	accept4 (aio_rfd rfh, SV *sockaddr, int salen, int flags)
		2502	PPCODE:
		2503	{
		2504	SV *retval;
		2505	#if HAVE_ACCEPT4
		2506	socklen_t salen_ = salen ? salen + 1 : 0;
		2507
748	if (nreqs)	2508	if (salen)
749	poll_wait ();	2509	{
		2510	sv_upgrade (sockaddr, SVt_PV);
		2511	sv_grow (sockaddr, salen_);
		2512	}
		2513
		2514	int res = accept4 (rfh, salen ? (struct sockaddr *)SvPVX (sockaddr) : 0, salen ? &salen_ : 0, flags);
		2515
		2516	retval = newmortalFH (res, O_RDWR);
		2517
		2518	if (res >= 0 && salen > 0)
		2519	{
		2520	if (salen_ > salen + 1)
		2521	salen_ = salen + 1;
		2522
		2523	SvPOK_only (sockaddr);
		2524	SvCUR_set (sockaddr, salen_);
		2525	}
		2526	#else
		2527	errno = ENOSYS;
		2528	retval = &PL_sv_undef;
		2529	#endif
		2530	XPUSHs (retval);
		2531	}
750		2532
751	int	2533	int
752	nreqs()	2534	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		2535	CODE:
		2536	{
		2537	#if HAVE_LINUX_SPLICE
		2538	loff_t off_in_, off_out_;
		2539	RETVAL = splice (
		2540	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		2541	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		2542	length, flags
		2543	);
		2544	#else
		2545	RETVAL = EIO_ENOSYS ();
		2546	#endif
		2547	}
		2548	OUTPUT:
		2549	RETVAL
		2550
		2551	int
		2552	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		2553	CODE:
		2554	#if HAVE_LINUX_SPLICE
		2555	RETVAL = tee (rfh, wfh, length, flags);
		2556	#else
		2557	RETVAL = EIO_ENOSYS ();
		2558	#endif
		2559	OUTPUT:
		2560	RETVAL
		2561
		2562	int
		2563	pipesize (aio_rfd rfh, int new_size = -1)
		2564	PROTOTYPE: $;$
		2565	CODE:
		2566	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		2567	if (new_size >= 0)
		2568	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		2569	else
		2570	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		2571	#else
		2572	errno = ENOSYS;
		2573	RETVAL = -1;
		2574	#endif
		2575	OUTPUT:
		2576	RETVAL
		2577
		2578	void
		2579	pipe2 (int flags = 0)
753	PROTOTYPE:	2580	PROTOTYPE: ;$
		2581	PPCODE:
		2582	{
		2583	int fd[2];
		2584	int res;
		2585
		2586	if (flags)
		2587	#if HAVE_PIPE2
		2588	res = pipe2 (fd, flags);
		2589	#else
		2590	res = (errno = ENOSYS, -1);
		2591	#endif
		2592	else
		2593	res = pipe (fd);
		2594
		2595	if (!res)
		2596	{
		2597	EXTEND (SP, 2);
		2598	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2599	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2600	}
		2601	}
		2602
		2603	void
		2604	eventfd (unsigned int initval = 0, int flags = 0)
		2605	PPCODE:
		2606	{
		2607	int fd;
		2608	#if HAVE_EVENTFD
		2609	fd = eventfd (initval, flags);
		2610	#else
		2611	fd = (errno = ENOSYS, -1);
		2612	#endif
		2613
		2614	XPUSHs (newmortalFH (fd, O_RDWR));
		2615	}
		2616
		2617	void
		2618	timerfd_create (int clockid, int flags = 0)
		2619	PPCODE:
		2620	{
		2621	int fd;
		2622	#if HAVE_TIMERFD
		2623	fd = timerfd_create (clockid, flags);
		2624	#else
		2625	fd = (errno = ENOSYS, -1);
		2626	#endif
		2627
		2628	XPUSHs (newmortalFH (fd, O_RDWR));
		2629	}
		2630
		2631	void
		2632	timerfd_settime (SV *fh, int flags, NV interval, NV value)
		2633	PPCODE:
		2634	{
		2635	int fd = s_fileno_croak (fh, 0);
		2636	#if HAVE_TIMERFD
		2637	int res;
		2638	struct itimerspec its, ots;
		2639
		2640	ts_set (&its.it_interval, interval);
		2641	ts_set (&its.it_value , value);
		2642	res = timerfd_settime (fd, flags, &its, &ots);
		2643
		2644	if (!res)
		2645	{
		2646	EXTEND (SP, 2);
		2647	PUSHs (newSVnv (ts_get (&ots.it_interval)));
		2648	PUSHs (newSVnv (ts_get (&ots.it_value)));
		2649	}
		2650	#else
		2651	errno = ENOSYS;
		2652	#endif
		2653	}
		2654
		2655	void
		2656	timerfd_gettime (SV *fh)
		2657	PPCODE:
		2658	{
		2659	int fd = s_fileno_croak (fh, 0);
		2660	#if HAVE_TIMERFD
		2661	int res;
		2662	struct itimerspec ots;
		2663	res = timerfd_gettime (fd, &ots);
		2664
		2665	if (!res)
		2666	{
		2667	EXTEND (SP, 2);
		2668	PUSHs (newSVnv (ts_get (&ots.it_interval)));
		2669	PUSHs (newSVnv (ts_get (&ots.it_value)));
		2670	}
		2671	#else
		2672	errno = ENOSYS;
		2673	#endif
		2674	}
		2675
		2676	void
		2677	memfd_create (SV8 *pathname, int flags = 0)
		2678	PPCODE:
		2679	{
		2680	int fd;
		2681	#if HAVE_MEMFD_CREATE
		2682	fd = memfd_create (SvPVbyte_nolen (pathname), flags);
		2683	#else
		2684	fd = (errno = ENOSYS, -1);
		2685	#endif
		2686
		2687	XPUSHs (newmortalFH (fd, O_RDWR));
		2688	}
		2689
		2690	UV
		2691	get_fdlimit ()
754	CODE:	2692	CODE:
755	RETVAL = nreqs;	2693	#if HAVE_RLIMITS
		2694	struct rlimit rl;
		2695	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2696	XSRETURN_UV (rl.rlim_cur == RLIM_INFINITY ? (UV)-1 : rl.rlim_cur);
		2697	#endif
		2698	XSRETURN_UNDEF;
756	OUTPUT:	2699	OUTPUT:
757	RETVAL	2700	RETVAL
758		2701
		2702	void
		2703	min_fdlimit (UV limit = 0x7fffffffU)
		2704	CODE:
		2705	{
		2706	#if HAVE_RLIMITS
		2707	struct rlimit rl;
		2708	rlim_t orig_rlim_max;
		2709	UV bit;
		2710
		2711	if (0 != getrlimit (RLIMIT_NOFILE, &rl))
		2712	goto fail;
		2713
		2714	if (rl.rlim_cur == RLIM_INFINITY)
		2715	XSRETURN_YES;
		2716
		2717	orig_rlim_max = rl.rlim_max == RLIM_INFINITY ? ((rlim_t)0)-1 : rl.rlim_max;
		2718
		2719	if (rl.rlim_cur < limit)
		2720	{
		2721	rl.rlim_cur = limit;
		2722
		2723	if (rl.rlim_max < rl.rlim_cur && rl.rlim_max != RLIM_INFINITY)
		2724	rl.rlim_max = rl.rlim_cur;
		2725	}
		2726
		2727	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2728	XSRETURN_YES;
		2729
		2730	if (errno == EPERM)
		2731	{
		2732	/* setlimit failed with EPERM - maybe we can't raise the hardlimit, or maybe */
		2733	/* our limit overflows a system-wide limit */
		2734	/* try an adaptive algorithm, but do not lower the hardlimit */
		2735	rl.rlim_max = 0;
		2736	for (bit = 0x40000000U; bit; bit >>= 1)
		2737	{
		2738	rl.rlim_max |= bit;
		2739	rl.rlim_cur = rl.rlim_max;
		2740
		2741	/* nevr decrease the hard limit */
		2742	if (rl.rlim_max < orig_rlim_max)
		2743	break;
		2744
		2745	if (0 != setrlimit (RLIMIT_NOFILE, &rl))
		2746	rl.rlim_max &= ~bit; /* too high, remove bit again */
		2747	}
		2748
		2749	/* now, raise the soft limit to the max permitted */
		2750	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2751	{
		2752	rl.rlim_cur = rl.rlim_max;
		2753	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2754	errno = EPERM;
		2755	}
		2756	}
		2757	#endif
		2758	fail:
		2759	XSRETURN_UNDEF;
		2760	}
		2761
		2762	void _on_next_submit (SV *cb)
		2763	CODE:
		2764	SvREFCNT_dec (on_next_submit);
		2765	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2766
		2767	PROTOTYPES: DISABLE
		2768
		2769	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2770
		2771	BOOT:
		2772	{
		2773	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2774	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2775	}
		2776
		2777	void
		2778	DESTROY (SV *self)
		2779	CODE:
		2780	{
		2781	aio_wd wd = SvAIO_WD (self);
		2782	#if HAVE_AT
		2783	{
		2784	SV *callback = &PL_sv_undef;
		2785	dREQ; /* clobbers next_pri :/ */
		2786	next_pri = req->pri; /* restore next_pri */
		2787	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2788	req->type = EIO_WD_CLOSE;
		2789	req->wd = wd;
		2790	REQ_SEND;
		2791	}
		2792	#else
		2793	eio_wd_close_sync (wd);
		2794	#endif
		2795	}
		2796
		2797	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		2798
		2799	void
		2800	cancel (aio_req_ornot req)
		2801	CODE:
		2802	eio_cancel (req);
		2803
		2804	void
		2805	cb (aio_req_ornot req, SV *callback = NO_INIT)
		2806	PPCODE:
		2807	{
		2808	if (GIMME_V != G_VOID)
		2809	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2810
		2811	if (items > 1)
		2812	{
		2813	SV *cb_cv = get_cb (callback);
		2814
		2815	SvREFCNT_dec (req->callback);
		2816	req->callback = SvREFCNT_inc (cb_cv);
		2817	}
		2818	}
		2819
		2820	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2821
		2822	void
		2823	add (aio_req grp, ...)
		2824	PPCODE:
		2825	{
		2826	int i;
		2827
		2828	if (grp->int1 == 2)
		2829	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2830
		2831	for (i = 1; i < items; ++i )
		2832	{
		2833	aio_req req;
		2834
		2835	if (GIMME_V != G_VOID)
		2836	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2837
		2838	req = SvAIO_REQ (ST (i));
		2839
		2840	if (req)
		2841	eio_grp_add (grp, req);
		2842	}
		2843	}
		2844
		2845	void
		2846	cancel_subs (aio_req_ornot req)
		2847	CODE:
		2848	req_cancel_subs (req);
		2849
		2850	void
		2851	result (aio_req grp, ...)
		2852	CODE:
		2853	{
		2854	int i;
		2855	AV *av;
		2856
		2857	grp->errorno = errno;
		2858
		2859	av = newAV ();
		2860	av_extend (av, items - 1);
		2861
		2862	for (i = 1; i < items; ++i )
		2863	av_push (av, newSVsv (ST (i)));
		2864
		2865	SvREFCNT_dec (grp->sv1);
		2866	grp->sv1 = (SV *)av;
		2867	}
		2868
		2869	void
		2870	errno (aio_req grp, int errorno = errno)
		2871	CODE:
		2872	grp->errorno = errorno;
		2873
		2874	void
		2875	limit (aio_req grp, int limit)
		2876	CODE:
		2877	eio_grp_limit (grp, limit);
		2878
		2879	void
		2880	feed (aio_req grp, SV *callback = &PL_sv_undef)
		2881	CODE:
		2882	{
		2883	SvREFCNT_dec (grp->sv2);
		2884	grp->sv2 = newSVsv (callback);
		2885	grp->feed = aio_grp_feed;
		2886
		2887	if (grp->int2 <= 0)
		2888	grp->int2 = 2;
		2889
		2890	eio_grp_limit (grp, grp->int2);
		2891	}
		2892

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