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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.50 by root, Sun Oct 22 21:13:47 2006 UTC vs.
Revision 1.243 by root, Mon Jul 18 07:48:01 2016 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	/* 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
		37
		38	/* perl namespace pollution */
		39	#undef VERSION
		40
		41	/* perl stupidly overrides readdir and maybe others */
		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
		81	#define EIO_STRUCT_STAT struct _stati64
		82	#define EIO_STRUCT_STATI64
		83
		84	#else
		85
31	# include <sys/socket.h>	86	#include <sys/time.h>
32	# elif __solaris /* not yet */
33	# include <sys/sendfile.h>	87	#include <sys/select.h>
		88	#include <unistd.h>
		89	#include <utime.h>
		90	#include <signal.h>
		91
		92	#define EIO_STRUCT_STAT Stat_t
		93
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	SV *sv3, *sv4; \
		119	STRLEN stroffset; \
		120	SV *self;
		121
		122	#define EIO_NO_WRAPPERS 1
		123
		124	#include "libeio/config.h"
		125	#include "libeio/eio.h"
		126
		127	static int req_invoke (eio_req *req);
		128	#define EIO_FINISH(req) req_invoke (req)
		129	static void req_destroy (eio_req *grp);
		130	#define EIO_DESTROY(req) req_destroy (req)
		131
		132	#include "libeio/eio.c"
		133
		134	#if !HAVE_POSIX_FADVISE
		135	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		136	#endif
		137
		138	#if !HAVE_POSIX_MADVISE
		139	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		140	#endif
		141
		142	#ifndef MAP_ANONYMOUS
		143	# ifdef MAP_ANON
		144	# define MAP_ANONYMOUS MAP_ANON
34	# else	145	# else
35	# error sendfile support requested but not available	146	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	147	# endif
37	#endif	148	#endif
38		149
39	/* used for struct dirent, AIX doesn't provide it */	150	/* defines all sorts of constants to 0 unless they are already defined */
40	#ifndef NAME_MAX	151	/* also provides const_iv_ and const_niv_ macros for them */
41	# define NAME_MAX 4096	152	#include "def0.h"
42	#endif
43		153
44	#if __ia64	154	#ifndef makedev
45	# define STACKSIZE 65536	155	# define makedev(maj,min) (((maj) << 8) | (min))
		156	#endif
		157	#ifndef major
		158	# define major(dev) ((dev) >> 8)
		159	#endif
		160	#ifndef minor
		161	# define minor(dev) ((dev) & 0xff)
		162	#endif
		163
		164	#if PAGESIZE <= 0
		165	# define PAGESIZE sysconf (_SC_PAGESIZE)
		166	#endif
		167
		168	/*****************************************************************************/
		169
		170	static void
		171	fiemap (eio_req *req)
		172	{
		173	req->result = -1;
		174
		175	#if HAVE_FIEMAP
		176	/* assume some c99 */
		177	struct fiemap *fiemap = 0;
		178	size_t end_offset;
		179	int count = req->int3;
		180
		181	req->flags |= EIO_FLAG_PTR1_FREE;
		182
		183	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		184	/* increase in 3.5kb steps */
		185	if (count < 0)
		186	count = 8;
		187
		188	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		189	errno = ENOMEM;
		190	if (!fiemap)
		191	return;
		192
		193	req->ptr1 = fiemap;
		194
		195	fiemap->fm_start = req->offs;
		196	fiemap->fm_length = req->size;
		197	fiemap->fm_flags = req->int2;
		198	fiemap->fm_extent_count = count;
		199
		200	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
		201	return;
		202
		203	if (req->int3 >= 0 /* not autosizing */
		204	|| !fiemap->fm_mapped_extents /* no more extents */
		205	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		206	goto done;
		207
		208	/* else we have to loop -
		209	* it would be tempting (actually I tried that first) to just query the
		210	* number of extents needed, but linux often feels like not returning all
		211	* extents, without telling us it left any out. this complicates
		212	* this quite a bit.
		213	*/
		214
		215	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
		216
		217	for (;;)
		218	{
		219	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
		220	char scratch[3072];
		221	struct fiemap *incmap = (struct fiemap *)scratch;
		222
		223	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
		224	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		225	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		226	incmap->fm_flags = fiemap->fm_flags;
		227	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
		228
		229	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
		230	return;
		231
		232	if (!incmap->fm_mapped_extents)
		233	goto done;
		234
		235	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		236	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		237	errno = ENOMEM;
		238	if (!fiemap)
		239	return;
		240
		241	req->ptr1 = fiemap;
		242
		243	for (count = 0; count < incmap->fm_mapped_extents; ++count)
		244	{
		245	struct fiemap_extent *e = incmap->fm_extents + count;
		246
		247	if (e->fe_logical + e->fe_length >= end_offset)
		248	goto done;
		249
		250	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		251
		252	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		253	goto done;
		254
		255	}
		256	}
		257
		258	done:
		259	req->result = 0;
		260
46	#else	261	#else
47	# define STACKSIZE 8192	262	errno = ENOSYS;
48	#endif	263	#endif
		264	}
		265
		266	/*****************************************************************************/
49		267
50	enum {	268	enum {
51	REQ_QUIT,	269	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};	270	};
63		271
64	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"
66
67	typedef struct aio_cb
68	{
69	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;
76	SV *fh, *fh2;
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */
88	unsigned char cancelled;
89	} aio_cb;
90
91	typedef aio_cb *aio_req;	272	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	273	typedef eio_req *aio_req_ornot;
		274	typedef eio_wd aio_wd;
93		275
94	static int started, wanted;	276	static SV *on_next_submit;
95	static volatile int nreqs;	277	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	278	static int max_outstanding;
97	static int respipe [2];
98		279
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	280	static s_epipe respipe;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		281
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	282	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_invoke (aio_req req);	283	static void req_cancel (aio_req req);
107	static void req_free (aio_req req);	284
		285	static void
		286	want_poll (void)
		287	{
		288	/* write a dummy byte to the pipe so fh becomes ready */
		289	s_epipe_signal (&respipe);
		290	}
		291
		292	static void
		293	done_poll (void)
		294	{
		295	/* read any signals sent by the worker threads */
		296	s_epipe_drain (&respipe);
		297	}
108		298
109	/* must be called at most once */	299	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	300	static SV *
		301	req_sv (aio_req req, HV *stash)
111	{	302	{
112	if (!req->self)	303	if (!req->self)
113	{	304	{
114	req->self = (SV *)newHV ();	305	req->self = (SV *)newHV ();
115	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	306	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
116	}	307	}
117		308
118	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	309	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
119	}	310	}
120		311
121	static aio_req SvAIO_REQ (SV *sv)	312	static SV *
		313	newSVaio_wd (aio_wd wd)
122	{	314	{
123	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	315	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		316	}
		317
		318	static aio_req
		319	SvAIO_REQ (SV *sv)
		320	{
		321	MAGIC *mg;
		322
		323	if (!SvROK (sv)
		324	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		325	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		326	&& SvSTASH (SvRV (sv)) != aio_req_stash
		327	&& !sv_derived_from (sv, "IO::AIO::REQ")))
124	croak ("object of class " AIO_REQ_KLASS " expected");	328	croak ("object of class IO::AIO::REQ expected");
125		329
126	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	330	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
127		331
128	return mg ? (aio_req)mg->mg_ptr : 0;	332	return mg ? (aio_req)mg->mg_ptr : 0;
129	}	333	}
130		334
		335	static aio_wd
		336	SvAIO_WD (SV *sv)
		337	{
		338	if (!SvROK (sv)
		339	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		340	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		341	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		342
		343	return (aio_wd)(long)SvIVX (SvRV (sv));
		344	}
		345
		346	static SV *
		347	newmortalFH (int fd, int flags)
		348	{
		349	if (fd < 0)
		350	return &PL_sv_undef;
		351
		352	GV *gv = (GV *)sv_newmortal ();
		353	char sym[64];
		354	int symlen;
		355
		356	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		357	gv_init (gv, aio_stash, sym, symlen, 0);
		358
		359	symlen = snprintf (
		360	sym,
		361	sizeof (sym),
		362	"%s&=%d",
		363	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		364	fd
		365	);
		366
		367	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		368	? (SV *)gv : &PL_sv_undef;
		369	}
		370
		371	static void
131	static void aio_grp_feed (aio_req grp)	372	aio_grp_feed (aio_req grp)
132	{	373	{
133	while (grp->length < grp->fd2)	374	if (grp->sv2 && SvOK (grp->sv2))
134	{	375	{
135	int old_len = grp->length;	376	dSP;
136		377
137	if (grp->fh2 && SvOK (grp->fh2))	378	ENTER;
		379	SAVETMPS;
		380	PUSHMARK (SP);
		381	XPUSHs (req_sv (grp, aio_grp_stash));
		382	PUTBACK;
		383	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		384	SPAGAIN;
		385	FREETMPS;
		386	LEAVE;
		387	}
		388	}
		389
		390	static void
		391	req_submit (eio_req *req)
		392	{
		393	eio_submit (req);
		394
		395	if (expect_false (on_next_submit))
		396	{
		397	dSP;
		398	SV *cb = sv_2mortal (on_next_submit);
		399
		400	on_next_submit = 0;
		401
		402	PUSHMARK (SP);
		403	PUTBACK;
		404	call_sv (cb, G_DISCARD | G_EVAL);
		405	}
		406	}
		407
		408	static int
		409	req_invoke (eio_req *req)
		410	{
		411	if (req->flags & FLAG_SV2_RO_OFF)
		412	SvREADONLY_off (req->sv2);
		413
		414	if (!EIO_CANCELLED (req) && req->callback)
		415	{
		416	dSP;
		417	static SV *sv_result_cache; /* caches the result integer SV */
		418	SV *sv_result;
		419
		420	ENTER;
		421	SAVETMPS;
		422	PUSHMARK (SP);
		423	EXTEND (SP, 1);
		424
		425	/* do not recreate the result IV from scratch each time */
		426	if (expect_true (sv_result_cache))
138	{	427	{
139	dSP;	428	sv_result = sv_result_cache; sv_result_cache = 0;
140		429	SvIV_set (sv_result, req->result);
141	ENTER;	430	SvIOK_only (sv_result);
142	SAVETMPS;
143	PUSHMARK (SP);
144	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
145	PUTBACK;
146	call_sv (grp->fh2, G_VOID | G_EVAL);
147	SPAGAIN;
148	FREETMPS;
149	LEAVE;
150	}	431	}
151		432	else
152	/* stop if no progress has been made */
153	if (old_len == grp->length)
154	{	433	{
155	SvREFCNT_dec (grp->fh2);	434	sv_result = newSViv (req->result);
156	grp->fh2 = 0;	435	SvREADONLY_on (sv_result);
157	break;
158	}	436	}
		437
		438	switch (req->type)
		439	{
		440	case EIO_WD_OPEN:
		441	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		442	break;
		443
		444	case EIO_READDIR:
		445	{
		446	SV *rv = &PL_sv_undef;
		447
		448	if (req->result >= 0)
		449	{
		450	int i;
		451	char *names = (char *)req->ptr2;
		452	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		453	AV *av = newAV ();
		454
		455	av_extend (av, req->result - 1);
		456
		457	for (i = 0; i < req->result; ++i)
		458	{
		459	if (req->int1 & EIO_READDIR_DENTS)
		460	{
		461	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		462
		463	if (req->int1 & EIO_READDIR_CUSTOM2)
		464	{
		465	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		466	AV *avent = newAV ();
		467
		468	av_extend (avent, 2);
		469
		470	if (!sv_type [ent->type])
		471	{
		472	sv_type [ent->type] = newSViv (ent->type);
		473	SvREADONLY_on (sv_type [ent->type]);
		474	}
		475
		476	av_store (avent, 0, namesv);
		477	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		478	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		479
		480	av_store (av, i, newRV_noinc ((SV *)avent));
		481	}
		482	else
		483	av_store (av, i, namesv);
		484
		485	++ent;
		486	}
		487	else
		488	{
		489	SV *name = newSVpv (names, 0);
		490	av_store (av, i, name);
		491	names += SvCUR (name) + 1;
		492	}
		493	}
		494
		495	rv = sv_2mortal (newRV_noinc ((SV *)av));
		496	}
		497
		498	PUSHs (rv);
		499
		500	if (req->int1 & EIO_READDIR_CUSTOM1)
		501	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		502	}
		503	break;
		504
		505	case EIO_OPEN:
		506	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		507	break;
		508
		509	case EIO_STATVFS:
		510	case EIO_FSTATVFS:
		511	{
		512	SV *rv = &PL_sv_undef;
		513
		514	#ifndef _WIN32
		515	if (req->result >= 0)
		516	{
		517	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		518	HV *hv = newHV ();
		519	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		520	* chooses to make it a struct.
		521	*/
		522	unsigned long fsid = 0;
		523	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		524
		525	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		526
		527	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		528	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		529	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		530	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		531	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		532	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		533	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		534	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		535	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		536	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		537	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		538	}
		539	#endif
		540
		541	PUSHs (rv);
		542	}
		543
		544	break;
		545
		546	case EIO_GROUP:
		547	req->int1 = 2; /* mark group as finished */
		548
		549	if (req->sv1)
		550	{
		551	int i;
		552	AV *av = (AV *)req->sv1;
		553
		554	EXTEND (SP, AvFILL (av) + 1);
		555	for (i = 0; i <= AvFILL (av); ++i)
		556	PUSHs (*av_fetch (av, i, 0));
		557	}
		558	break;
		559
		560	case EIO_NOP:
		561	case EIO_BUSY:
		562	break;
		563
		564	case EIO_READLINK:
		565	case EIO_REALPATH:
		566	if (req->result > 0)
		567	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		568	break;
		569
		570	case EIO_STAT:
		571	case EIO_LSTAT:
		572	case EIO_FSTAT:
		573	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		574
		575	if (!(PL_laststatval = req->result))
		576	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		577	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		578
		579	PUSHs (sv_result);
		580	break;
		581
		582	case EIO_SEEK:
		583	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		584	break;
		585
		586	case EIO_READ:
		587	{
		588	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		589	*SvEND (req->sv2) = 0;
		590	SvPOK_only (req->sv2);
		591	SvSETMAGIC (req->sv2);
		592	PUSHs (sv_result);
		593	}
		594	break;
		595
		596	case EIO_CUSTOM:
		597	if (req->feed == fiemap)
		598	{
		599	#if HAVE_FIEMAP
		600	if (!req->result)
		601	{
		602	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		603
		604	if (fiemap->fm_extent_count)
		605	{
		606	AV *av = newAV ();
		607	int i;
		608
		609	while (fiemap->fm_mapped_extents)
		610	{
		611	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		612	AV *ext_av = newAV ();
		613
		614	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		615	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		616	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		617	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		618
		619	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		620	}
		621
		622	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		623	}
		624	else
		625	{
		626	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		627	PUSHs (sv_result);
		628	}
		629	}
		630	#endif
		631	}
		632	else
		633	PUSHs (sv_result);
		634	break;
		635
		636	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		637	if (req->result > 0)
		638	SvIV_set (sv_result, 0);
		639	/* FALLTHROUGH */
		640
		641	default:
		642	PUSHs (sv_result);
		643	break;
		644	}
		645
		646	errno = req->errorno;
		647
		648	PUTBACK;
		649	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		650	SPAGAIN;
		651
		652	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		653	SvREFCNT_dec (sv_result);
		654	else
		655	sv_result_cache = sv_result;
		656
		657	FREETMPS;
		658	LEAVE;
		659
		660	PUTBACK;
159	}	661	}
160	}
161		662
162	static void aio_grp_dec (aio_req grp)	663	return !!SvTRUE (ERRSV);
163	{
164	--grp->length;
165
166	/* call feeder, if applicable */
167	aio_grp_feed (grp);
168
169	/* finish, if done */
170	if (!grp->length && grp->fd)
171	{
172	req_invoke (grp);
173	req_free (grp);
174	}
175	}	664	}
176		665
177	static void poll_wait ()	666	static void
		667	req_destroy (aio_req req)
178	{	668	{
179	if (nreqs && !ress)
180	{
181	fd_set rfd;
182	FD_ZERO(&rfd);
183	FD_SET(respipe [0], &rfd);
184
185	select (respipe [0] + 1, &rfd, 0, 0, 0);
186	}
187	}
188
189	static void req_invoke (aio_req req)
190	{
191	dSP;
192	int errorno = errno;
193
194	if (req->cancelled || !SvOK (req->callback))
195	return;
196
197	errno = req->errorno;
198
199	ENTER;
200	SAVETMPS;
201	PUSHMARK (SP);
202	EXTEND (SP, 1);
203
204	switch (req->type)
205	{
206	case REQ_READDIR:
207	{
208	SV *rv = &PL_sv_undef;
209
210	if (req->result >= 0)
211	{
212	char *buf = req->data2ptr;
213	AV *av = newAV ();
214
215	while (req->result)
216	{
217	SV *sv = newSVpv (buf, 0);
218
219	av_push (av, sv);
220	buf += SvCUR (sv) + 1;
221	req->result--;
222	}
223
224	rv = sv_2mortal (newRV_noinc ((SV *)av));
225	}
226
227	PUSHs (rv);
228	}
229	break;
230
231	case REQ_OPEN:
232	{
233	/* convert fd to fh */
234	SV *fh;
235
236	PUSHs (sv_2mortal (newSViv (req->result)));
237	PUTBACK;
238	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
239	SPAGAIN;
240
241	fh = SvREFCNT_inc (POPs);
242
243	PUSHMARK (SP);
244	XPUSHs (sv_2mortal (fh));
245	}
246	break;
247
248	case REQ_GROUP:
249	req->fd = 2; /* mark group as finished */
250
251	if (req->data)
252	{
253	int i;
254	AV *av = (AV *)req->data;
255
256	EXTEND (SP, AvFILL (av) + 1);
257	for (i = 0; i <= AvFILL (av); ++i)
258	PUSHs (*av_fetch (av, i, 0));
259	}
260	break;
261
262	case REQ_SLEEP:
263	break;
264
265	default:
266	PUSHs (sv_2mortal (newSViv (req->result)));
267	break;
268	}
269
270
271	PUTBACK;
272	call_sv (req->callback, G_VOID | G_EVAL);
273	SPAGAIN;
274
275	if (SvTRUE (ERRSV))
276	{
277	req_free (req);
278	croak (0);
279	}
280
281	FREETMPS;
282	LEAVE;
283
284	errno = errorno;
285	}
286
287	static void req_free (aio_req req)
288	{
289	if (req->grp)
290	{
291	aio_req grp = req->grp;
292
293	/* unlink request */
294	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
295	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
296
297	if (grp->grp_first == req)
298	grp->grp_first = req->grp_next;
299
300	aio_grp_dec (grp);
301	}
302
303	if (req->self)	669	if (req->self)
304	{	670	{
305	sv_unmagic (req->self, PERL_MAGIC_ext);	671	sv_unmagic (req->self, PERL_MAGIC_ext);
306	SvREFCNT_dec (req->self);	672	SvREFCNT_dec (req->self);
307	}	673	}
308		674
309	SvREFCNT_dec (req->data);
310	SvREFCNT_dec (req->fh);	675	SvREFCNT_dec (req->sv1);
311	SvREFCNT_dec (req->fh2);	676	SvREFCNT_dec (req->sv2);
		677	SvREFCNT_dec (req->sv3);
		678	SvREFCNT_dec (req->sv4);
312	SvREFCNT_dec (req->callback);	679	SvREFCNT_dec (req->callback);
313	Safefree (req->statdata);
314		680
315	if (req->type == REQ_READDIR && req->result >= 0)
316	free (req->data2ptr);
317
318	Safefree (req);	681	free (req);
319	}	682	}
320		683
321	static void req_cancel (aio_req req)	684	static void
		685	req_cancel_subs (aio_req grp)
322	{	686	{
323	req->cancelled = 1;
324
325	if (req->type == REQ_GROUP)	687	if (grp->type != EIO_GROUP)
		688	return;
		689
		690	SvREFCNT_dec (grp->sv2);
		691	grp->sv2 = 0;
		692
		693	eio_grp_cancel (grp);
		694	}
		695
		696	static void ecb_cold
		697	create_respipe (void)
		698	{
		699	if (s_epipe_renew (&respipe))
		700	croak ("IO::AIO: unable to initialize result pipe");
		701	}
		702
		703	static void
		704	poll_wait (void)
		705	{
		706	while (eio_nreqs ())
326	{	707	{
327	aio_req sub;	708	int size;
328		709
329	for (sub = req->grp_first; sub; sub = sub->grp_next)	710	X_LOCK (EIO_POOL->reslock);
330	req_cancel (sub);	711	size = EIO_POOL->res_queue.size;
		712	X_UNLOCK (EIO_POOL->reslock);
		713
		714	if (size)
		715	return;
		716
		717	etp_maybe_start_thread (EIO_POOL);
		718
		719	s_epipe_wait (&respipe);
331	}	720	}
332	}	721	}
333		722
334	static int poll_cb ()	723	static int
		724	poll_cb (void)
335	{	725	{
336	dSP;
337	int count = 0;
338	int do_croak = 0;
339	aio_req req;
340
341	for (;;)	726	for (;;)
342	{	727	{
343	pthread_mutex_lock (&reslock);	728	int res = eio_poll ();
344	req = ress;
345		729
346	if (req)	730	if (res > 0)
		731	croak (0);
		732
		733	if (!max_outstanding || max_outstanding > eio_nreqs ())
		734	return res;
		735
		736	poll_wait ();
		737	}
		738	}
		739
		740	static void ecb_cold
		741	reinit (void)
		742	{
		743	create_respipe ();
		744
		745	if (eio_init (want_poll, done_poll) < 0)
		746	croak ("IO::AIO: unable to initialise eio library");
		747	}
		748
		749	/*****************************************************************************/
		750
		751	#if !_POSIX_MAPPED_FILES
		752	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		753	# define munmap(addr,length) EIO_ENOSYS ()
		754	#endif
		755
		756	#if !_POSIX_MEMORY_PROTECTION
		757	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		758	#endif
		759
		760	#define MMAP_MAGIC PERL_MAGIC_ext
		761
		762	static int ecb_cold
		763	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		764	{
		765	int old_errno = errno;
		766	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		767	errno = old_errno;
		768
		769	mg->mg_obj = 0; /* just in case */
		770
		771	SvREADONLY_off (sv);
		772
		773	if (SvPVX (sv) != mg->mg_ptr)
		774	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		775
		776	SvCUR_set (sv, 0);
		777	SvPVX (sv) = 0;
		778	SvOK_off (sv);
		779
		780	return 0;
		781	}
		782
		783	static MGVTBL mmap_vtbl = {
		784	0, 0, 0, 0, mmap_free
		785	};
		786
		787	/*****************************************************************************/
		788
		789	static SV *
		790	get_cb (SV *cb_sv)
		791	{
		792	SvGETMAGIC (cb_sv);
		793	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		794	}
		795
		796	static aio_req ecb_noinline
		797	dreq (SV *callback)
		798	{
		799	SV *cb_cv;
		800	aio_req req;
		801	int req_pri = next_pri;
		802	next_pri = EIO_PRI_DEFAULT;
		803
		804	cb_cv = get_cb (callback);
		805
		806	req = calloc (sizeof (*req), 1);
		807	if (!req)
		808	croak ("out of memory during eio_req allocation");
		809
		810	req->callback = SvREFCNT_inc (cb_cv);
		811	req->pri = req_pri;
		812
		813	return req;
		814	}
		815
		816	#define dREQ \
		817	aio_req req = dreq (callback); \
		818
		819	#define REQ_SEND \
		820	PUTBACK; \
		821	req_submit (req); \
		822	SPAGAIN; \
		823	\
		824	if (GIMME_V != G_VOID) \
		825	XPUSHs (req_sv (req, aio_req_stash));
		826
		827	ecb_inline void
		828	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
		829	{
		830	if (expect_false (SvROK (path)))
		831	{
		832	SV *rv = SvRV (path);
		833	SV *wdob;
		834
		835	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
347	{	836	{
348	ress = req->next;	837	path = AvARRAY (rv)[1];
		838	wdob = AvARRAY (rv)[0];
349		839
350	if (!ress)	840	if (SvOK (wdob))
351	{	841	{
352	/* read any signals sent by the worker threads */	842	*wd = SvAIO_WD (wdob);
353	char buf [32];	843	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
354	while (read (respipe [0], buf, 32) == 32)
355	;
356
357	rese = 0;
358	}	844	}
		845	else
		846	*wd = EIO_INVALID_WD;
359	}	847	}
360		848	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
361	pthread_mutex_unlock (&reslock);
362
363	if (!req)
364	break;
365
366	--nreqs;
367
368	if (req->type == REQ_QUIT)
369	started--;
370	else if (req->type == REQ_GROUP && req->length)
371	{	849	{
372	req->fd = 1; /* mark request as delayed */	850	*wd = (aio_wd)(long)SvIVX (rv);
373	continue;	851	*wdsv = SvREFCNT_inc_NN (rv);
		852	*ptr = ".";
		853	return; /* path set to "." */
374	}	854	}
375	else	855	else
376	{	856	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
377	if (req->type == REQ_READ)
378	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
379
380	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
381	SvREADONLY_off (req->data);
382
383	if (req->statdata)
384	{
385	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
386	PL_laststatval = req->result;
387	PL_statcache = *(req->statdata);
388	}
389
390	req_invoke (req);
391
392	count++;
393	}
394
395	req_free (req);
396	}	857	}
397		858
398	return count;	859	*pathsv = newSVsv (path);
		860	*ptr = SvPVbyte_nolen (*pathsv);
399	}	861	}
400		862
401	static void *aio_proc(void *arg);	863	static void ecb_noinline
402		864	req_set_path1 (aio_req req, SV *path)
403	static void start_thread (void)
404	{	865	{
405	sigset_t fullsigset, oldsigset;	866	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
406	pthread_t tid;
407	pthread_attr_t attr;
408
409	pthread_attr_init (&attr);
410	pthread_attr_setstacksize (&attr, STACKSIZE);
411	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
412
413	sigfillset (&fullsigset);
414	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
415
416	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
417	started++;
418
419	sigprocmask (SIG_SETMASK, &oldsigset, 0);
420	}	867	}
421		868
422	static void req_send (aio_req req)	869	static void ecb_noinline
		870	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
423	{	871	{
424	while (started < wanted && nreqs >= started)	872	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
425	start_thread ();
426		873
427	++nreqs;	874	switch (SvTYPE (rv))
428
429	pthread_mutex_lock (&reqlock);
430
431	req->next = 0;
432
433	if (reqe)
434	{	875	{
435	reqe->next = req;	876	case SVt_PVIO:
436	reqe = req;	877	case SVt_PVLV:
		878	case SVt_PVGV:
		879	req->type = type_fh;
		880	req->sv1 = newSVsv (fh_or_path);
		881	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		882	break;
		883
		884	default:
		885	req->type = type_path;
		886	req_set_path1 (req, fh_or_path);
		887	break;
437	}	888	}
438	else
439	reqe = reqs = req;
440
441	pthread_cond_signal (&reqwait);
442	pthread_mutex_unlock (&reqlock);
443
444	if (nreqs > max_outstanding)
445	for (;;)
446	{
447	poll_cb ();
448
449	if (nreqs <= max_outstanding)
450	break;
451
452	poll_wait ();
453	}
454	}	889	}
455		890
456	static void end_thread (void)	891	XS(boot_IO__AIO) ecb_cold;
457	{
458	aio_req req;
459	Newz (0, req, 1, aio_cb);
460	req->type = REQ_QUIT;
461		892
462	req_send (req);	893	MODULE = IO::AIO PACKAGE = IO::AIO
463	}
464		894
465	static void min_parallel (int nthreads)	895	PROTOTYPES: ENABLE
466	{
467	if (wanted < nthreads)
468	wanted = nthreads;
469	}
470		896
471	static void max_parallel (int nthreads)	897	BOOT:
472	{	898	{
473	int cur = started;	899	static const struct {
		900	const char *name;
		901	IV iv;
		902	} *civ, const_iv[] = {
		903	# define const_niv(name, value) { # name, (IV) value },
		904	# define const_iv(name) { # name, (IV) name },
		905	# define const_eio(name) { # name, (IV) EIO_ ## name },
474		906
475	if (wanted > nthreads)	907	/* you have to re-run ./gendef0 after adding/removing any constants here */
476	wanted = nthreads;	908	/* the first block can be undef if missing */
		909	const_iv (ENOSYS)
		910	const_iv (EXDEV)
		911	const_iv (EBADR)
477		912
478	while (cur > wanted)	913	/* for lseek */
479	{	914	const_iv (SEEK_DATA)
480	end_thread ();	915	const_iv (SEEK_HOLE)
481	cur--;
482	}
483		916
484	while (started > wanted)	917	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
485	{	918	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
486	poll_wait ();	919	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
487	poll_cb ();	920	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
488	}	921	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
489	}	922	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
490		923
491	static void create_pipe ()	924	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
492	{	925	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
493	if (pipe (respipe))	926	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
494	croak ("unable to initialize result pipe");	927	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		928	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		929	const_niv (MADV_FREE , POSIX_MADV_FREE)
495		930
496	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	931	/* the second block will be 0 when missing */
497	croak ("cannot set result pipe to nonblocking mode");	932	const_iv (O_RDONLY)
		933	const_iv (O_WRONLY)
		934	const_iv (O_RDWR)
		935	const_iv (O_CREAT)
		936	const_iv (O_TRUNC)
		937	const_iv (O_EXCL)
		938	const_iv (O_APPEND)
498		939
499	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	940	const_iv (O_ASYNC)
500	croak ("cannot set result pipe to nonblocking mode");	941	const_iv (O_DIRECT)
501	}	942	const_iv (O_NOATIME)
502		943
503	/*****************************************************************************/	944	const_iv (O_CLOEXEC)
504	/* work around various missing functions */	945	const_iv (O_NOCTTY)
		946	const_iv (O_NOFOLLOW)
		947	const_iv (O_NONBLOCK)
		948	const_iv (O_EXEC)
		949	const_iv (O_SEARCH)
		950	const_iv (O_DIRECTORY)
		951	const_iv (O_DSYNC)
		952	const_iv (O_RSYNC)
		953	const_iv (O_SYNC)
		954	const_iv (O_PATH)
		955	const_iv (O_TMPFILE)
		956	const_iv (O_TTY_INIT)
505		957
506	#if !HAVE_PREADWRITE	958	const_iv (S_IFIFO)
507	# define pread aio_pread	959	const_iv (S_IFCHR)
508	# define pwrite aio_pwrite	960	const_iv (S_IFBLK)
		961	const_iv (S_IFLNK)
		962	const_iv (S_IFREG)
		963	const_iv (S_IFDIR)
		964	const_iv (S_IFWHT)
		965	const_iv (S_IFSOCK)
		966	const_iv (S_IFMT)
509		967
510	/*	968	const_iv (ST_RDONLY)
511	* make our pread/pwrite safe against themselves, but not against	969	const_iv (ST_NOSUID)
512	* normal read/write by using a mutex. slows down execution a lot,	970	const_iv (ST_NODEV)
513	* but that's your problem, not mine.	971	const_iv (ST_NOEXEC)
514	*/	972	const_iv (ST_SYNCHRONOUS)
515	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	973	const_iv (ST_MANDLOCK)
		974	const_iv (ST_WRITE)
		975	const_iv (ST_APPEND)
		976	const_iv (ST_IMMUTABLE)
		977	const_iv (ST_NOATIME)
		978	const_iv (ST_NODIRATIME)
		979	const_iv (ST_RELATIME)
516		980
517	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	981	const_iv (PROT_NONE)
518	{	982	const_iv (PROT_EXEC)
519	ssize_t res;	983	const_iv (PROT_READ)
520	off_t ooffset;	984	const_iv (PROT_WRITE)
521		985
522	pthread_mutex_lock (&preadwritelock);	986	const_iv (MAP_PRIVATE)
523	ooffset = lseek (fd, 0, SEEK_CUR);	987	const_iv (MAP_SHARED)
524	lseek (fd, offset, SEEK_SET);	988	const_iv (MAP_FIXED)
525	res = read (fd, buf, count);	989	const_iv (MAP_ANONYMOUS)
526	lseek (fd, ooffset, SEEK_SET);
527	pthread_mutex_unlock (&preadwritelock);
528		990
529	return res;	991	/* linuxish */
530	}	992	const_iv (MAP_LOCKED)
		993	const_iv (MAP_NORESERVE)
		994	const_iv (MAP_POPULATE)
		995	const_iv (MAP_NONBLOCK)
		996	const_iv (MAP_GROWSDOWN)
		997	const_iv (MAP_32BIT)
		998	const_iv (MAP_HUGETLB)
		999	const_iv (MAP_STACK)
531		1000
532	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	1001	const_iv (FIFREEZE)
533	{	1002	const_iv (FITHAW)
534	ssize_t res;	1003	const_iv (FITRIM)
535	off_t ooffset;	1004	const_iv (FICLONE)
		1005	const_iv (FICLONERANGE)
		1006	const_iv (FIDEDUPERANGE)
536		1007
537	pthread_mutex_lock (&preadwritelock);	1008	const_iv (FS_IOC_GETFLAGS)
538	ooffset = lseek (fd, 0, SEEK_CUR);	1009	const_iv (FS_IOC_SETFLAGS)
539	lseek (fd, offset, SEEK_SET);	1010	const_iv (FS_IOC_GETVERSION)
540	res = write (fd, buf, count);	1011	const_iv (FS_IOC_SETVERSION)
541	lseek (fd, offset, SEEK_SET);	1012	const_iv (FS_IOC_FIEMAP)
542	pthread_mutex_unlock (&preadwritelock);	1013	const_iv (FS_IOC_FSGETXATTR)
		1014	const_iv (FS_IOC_FSSETXATTR)
		1015	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1016	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1017	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
543		1018
544	return res;	1019	const_iv (FS_KEY_DESCRIPTOR_SIZE)
545	}
546	#endif
547		1020
548	#if !HAVE_FDATASYNC	1021	const_iv (FS_SECRM_FL)
549	# define fdatasync fsync	1022	const_iv (FS_UNRM_FL)
550	#endif	1023	const_iv (FS_COMPR_FL)
		1024	const_iv (FS_SYNC_FL)
		1025	const_iv (FS_IMMUTABLE_FL)
		1026	const_iv (FS_APPEND_FL)
		1027	const_iv (FS_NODUMP_FL)
		1028	const_iv (FS_NOATIME_FL)
		1029	const_iv (FS_DIRTY_FL)
		1030	const_iv (FS_COMPRBLK_FL)
		1031	const_iv (FS_NOCOMP_FL)
		1032	const_iv (FS_ENCRYPT_FL)
		1033	const_iv (FS_BTREE_FL)
		1034	const_iv (FS_INDEX_FL)
		1035	const_iv (FS_JOURNAL_DATA_FL)
		1036	const_iv (FS_NOTAIL_FL)
		1037	const_iv (FS_DIRSYNC_FL)
		1038	const_iv (FS_TOPDIR_FL)
		1039	const_iv (FS_FL_USER_MODIFIABLE)
551		1040
552	#if !HAVE_READAHEAD	1041	const_iv (FS_XFLAG_REALTIME)
553	# define readahead aio_readahead	1042	const_iv (FS_XFLAG_PREALLOC)
		1043	const_iv (FS_XFLAG_IMMUTABLE)
		1044	const_iv (FS_XFLAG_APPEND)
		1045	const_iv (FS_XFLAG_SYNC)
		1046	const_iv (FS_XFLAG_NOATIME)
		1047	const_iv (FS_XFLAG_NODUMP)
		1048	const_iv (FS_XFLAG_RTINHERIT)
		1049	const_iv (FS_XFLAG_PROJINHERIT)
		1050	const_iv (FS_XFLAG_NOSYMLINKS)
		1051	const_iv (FS_XFLAG_EXTSIZE)
		1052	const_iv (FS_XFLAG_EXTSZINHERIT)
		1053	const_iv (FS_XFLAG_NODEFRAG)
		1054	const_iv (FS_XFLAG_FILESTREAM)
		1055	const_iv (FS_XFLAG_DAX)
		1056	const_iv (FS_XFLAG_HASATTR)
554		1057
555	static ssize_t readahead (int fd, off_t offset, size_t count)	1058	const_iv (FIEMAP_FLAG_SYNC)
556	{	1059	const_iv (FIEMAP_FLAG_XATTR)
557	char readahead_buf[4096];	1060	const_iv (FIEMAP_FLAGS_COMPAT)
		1061	const_iv (FIEMAP_EXTENT_LAST)
		1062	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1063	const_iv (FIEMAP_EXTENT_DELALLOC)
		1064	const_iv (FIEMAP_EXTENT_ENCODED)
		1065	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1066	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1067	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1068	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1069	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1070	const_iv (FIEMAP_EXTENT_MERGED)
		1071	const_iv (FIEMAP_EXTENT_SHARED)
558		1072
559	while (count > 0)	1073	const_iv (SPLICE_F_MOVE)
560	{	1074	const_iv (SPLICE_F_NONBLOCK)
561	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	1075	const_iv (SPLICE_F_MORE)
		1076	const_iv (SPLICE_F_GIFT)
562		1077
563	pread (fd, readahead_buf, len, offset);	1078	/* these are libeio constants, and are independent of gendef0 */
564	offset += len;	1079	const_eio (SEEK_SET)
565	count -= len;	1080	const_eio (SEEK_CUR)
566	}	1081	const_eio (SEEK_END)
567		1082
568	errno = 0;	1083	const_eio (MCL_FUTURE)
569	}	1084	const_eio (MCL_CURRENT)
570	#endif
571		1085
572	#if !HAVE_READDIR_R	1086	const_eio (MS_ASYNC)
573	# define readdir_r aio_readdir_r	1087	const_eio (MS_INVALIDATE)
		1088	const_eio (MS_SYNC)
574		1089
575	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	1090	const_eio (MT_MODIFY)
576
577	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
578	{
579	struct dirent *e;
580	int errorno;
581		1091
582	pthread_mutex_lock (&readdirlock);	1092	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1093	const_eio (SYNC_FILE_RANGE_WRITE)
		1094	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
583		1095
584	e = readdir (dirp);	1096	const_eio (FALLOC_FL_KEEP_SIZE)
585	errorno = errno;	1097	const_eio (FALLOC_FL_PUNCH_HOLE)
		1098	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1099	const_eio (FALLOC_FL_ZERO_RANGE)
586		1100
587	if (e)	1101	const_eio (READDIR_DENTS)
588	{	1102	const_eio (READDIR_DIRS_FIRST)
589	*res = ent;	1103	const_eio (READDIR_STAT_ORDER)
590	strcpy (ent->d_name, e->d_name);	1104	const_eio (READDIR_FOUND_UNKNOWN)
591	}
592	else
593	*res = 0;
594		1105
595	pthread_mutex_unlock (&readdirlock);	1106	const_eio (DT_UNKNOWN)
596		1107	const_eio (DT_FIFO)
597	errno = errorno;	1108	const_eio (DT_CHR)
598	return e ? 0 : -1;	1109	const_eio (DT_DIR)
599	}	1110	const_eio (DT_BLK)
600	#endif	1111	const_eio (DT_REG)
601		1112	const_eio (DT_LNK)
602	/* sendfile always needs emulation */	1113	const_eio (DT_SOCK)
603	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	1114	const_eio (DT_WHT)
604	{
605	ssize_t res;
606
607	if (!count)
608	return 0;
609
610	#if HAVE_SENDFILE
611	# if __linux
612	res = sendfile (ofd, ifd, &offset, count);
613
614	# elif __freebsd
615	/*
616	* Of course, the freebsd sendfile is a dire hack with no thoughts
617	* wasted on making it similar to other I/O functions.
618	*/
619	{
620	off_t sbytes;
621	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
622
623	if (res < 0 && sbytes)
624	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
625	res = sbytes;
626	}	1115	};
627		1116
628	# elif __hpux	1117	aio_stash = gv_stashpv ("IO::AIO" , 1);
629	res = sendfile (ofd, ifd, offset, count, 0, 0);	1118	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1119	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1120	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
630		1121
631	# elif __solaris	1122	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
632	{	1123	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
633	struct sendfilevec vec;
634	size_t sbytes;
635		1124
636	vec.sfv_fd = ifd;	1125	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
637	vec.sfv_flag = 0;
638	vec.sfv_off = offset;
639	vec.sfv_len = count;
640		1126
641	res = sendfilev (ofd, &vec, 1, &sbytes);	1127	reinit ();
		1128	}
642		1129
643	if (res < 0 && sbytes)	1130	void
		1131	reinit ()
		1132	PROTOTYPE:
		1133
		1134	void
		1135	max_poll_reqs (unsigned int nreqs)
		1136	PROTOTYPE: $
		1137	CODE:
		1138	eio_set_max_poll_reqs (nreqs);
		1139
		1140	void
		1141	max_poll_time (double nseconds)
		1142	PROTOTYPE: $
		1143	CODE:
		1144	eio_set_max_poll_time (nseconds);
		1145
		1146	void
		1147	min_parallel (unsigned int nthreads)
		1148	PROTOTYPE: $
		1149	CODE:
		1150	eio_set_min_parallel (nthreads);
		1151
		1152	void
		1153	max_parallel (unsigned int nthreads)
		1154	PROTOTYPE: $
		1155	CODE:
		1156	eio_set_max_parallel (nthreads);
		1157
		1158	void
		1159	max_idle (unsigned int nthreads)
		1160	PROTOTYPE: $
		1161	CODE:
		1162	eio_set_max_idle (nthreads);
		1163
		1164	void
		1165	idle_timeout (unsigned int seconds)
		1166	PROTOTYPE: $
		1167	CODE:
		1168	eio_set_idle_timeout (seconds);
		1169
		1170	void
		1171	max_outstanding (unsigned int maxreqs)
		1172	PROTOTYPE: $
		1173	CODE:
		1174	max_outstanding = maxreqs;
		1175
		1176	void
		1177	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
		1178	PPCODE:
		1179	{
		1180	dREQ;
		1181
		1182	req->type = EIO_WD_OPEN;
		1183	req_set_path1 (req, pathname);
		1184
		1185	REQ_SEND;
		1186	}
		1187
		1188	void
		1189	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1190	PPCODE:
		1191	{
		1192	dREQ;
		1193
		1194	req->type = EIO_OPEN;
		1195	req_set_path1 (req, pathname);
		1196	req->int1 = flags;
		1197	req->int2 = mode;
		1198
		1199	REQ_SEND;
		1200	}
		1201
		1202	void
		1203	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
		1204	ALIAS:
		1205	aio_fsync = EIO_FSYNC
		1206	aio_fdatasync = EIO_FDATASYNC
		1207	aio_syncfs = EIO_SYNCFS
		1208	PPCODE:
		1209	{
		1210	int fd = s_fileno_croak (fh, 0);
		1211	dREQ;
		1212
		1213	req->type = ix;
		1214	req->sv1 = newSVsv (fh);
		1215	req->int1 = fd;
		1216
		1217	REQ_SEND;
		1218	}
		1219
		1220	void
		1221	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1222	PPCODE:
		1223	{
		1224	int fd = s_fileno_croak (fh, 0);
		1225	dREQ;
		1226
		1227	req->type = EIO_SYNC_FILE_RANGE;
		1228	req->sv1 = newSVsv (fh);
		1229	req->int1 = fd;
		1230	req->offs = offset;
644	res = sbytes;	1231	req->size = nbytes;
645	}	1232	req->int2 = flags;
646		1233
647	# endif	1234	REQ_SEND;
		1235	}
		1236
		1237	void
		1238	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1239	PPCODE:
		1240	{
		1241	int fd = s_fileno_croak (fh, 0);
		1242	dREQ;
		1243
		1244	req->type = EIO_FALLOCATE;
		1245	req->sv1 = newSVsv (fh);
		1246	req->int1 = fd;
		1247	req->int2 = mode;
		1248	req->offs = offset;
		1249	req->size = len;
		1250
		1251	REQ_SEND;
		1252	}
		1253
		1254	void
		1255	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1256	PPCODE:
		1257	{
		1258	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1259	int fd = s_fileno_croak (fh, 0);
		1260	dREQ;
		1261
		1262	if (expect_false (close_fd < 0))
		1263	{
		1264	int pipefd [2];
		1265
		1266	if (
		1267	#ifdef _WIN32
		1268	_pipe (pipefd, 1, _O_BINARY) < 0
648	#else	1269	#else
649	res = -1;	1270	pipe (pipefd) < 0
650	errno = ENOSYS;	1271	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
651	#endif	1272	#endif
652		1273	|| close (pipefd [1]) < 0
653	if (res < 0
654	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
655	#if __solaris
656	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
657	#endif
658	)
659	)
660	{
661	/* emulate sendfile. this is a major pain in the ass */
662	char buf[4096];
663	res = 0;
664
665	while (count)
666	{
667	ssize_t cnt;
668
669	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
670
671	if (cnt <= 0)
672	{	1274	)
673	if (cnt && !res) res = -1;	1275	abort (); /*D*/
674	break;
675	}
676		1276
677	cnt = write (ofd, buf, cnt);	1277	close_fd = pipefd [0];
678
679	if (cnt <= 0)
680	{
681	if (cnt && !res) res = -1;
682	break;
683	}
684
685	offset += cnt;
686	res += cnt;
687	count -= cnt;
688	}
689	}
690
691	return res;
692	}
693
694	/* read a full directory */
695	static int scandir_ (const char *path, void **namesp)
696	{
697	DIR *dirp = opendir (path);
698	union
699	{
700	struct dirent d;
701	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
702	} u;
703	struct dirent *entp;
704	char *name, *names;
705	int memlen = 4096;
706	int memofs = 0;
707	int res = 0;
708	int errorno;
709
710	if (!dirp)
711	return -1;
712
713	names = malloc (memlen);
714
715	for (;;)
716	{
717	errno = 0, readdir_r (dirp, &u.d, &entp);
718
719	if (!entp)
720	break;
721
722	name = entp->d_name;
723
724	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
725	{
726	int len = strlen (name) + 1;
727
728	res++;
729
730	while (memofs + len > memlen)
731	{
732	memlen *= 2;
733	names = realloc (names, memlen);
734	if (!names)
735	break;
736	}
737
738	memcpy (names + memofs, name, len);
739	memofs += len;
740	}
741	}
742
743	errorno = errno;
744	closedir (dirp);
745
746	if (errorno)
747	{
748	free (names);
749	errno = errorno;
750	res = -1;
751	}
752
753	*namesp = (void *)names;
754	return res;
755	}
756
757	/*****************************************************************************/
758
759	static void *aio_proc (void *thr_arg)
760	{
761	aio_req req;
762	int type;
763
764	do
765	{
766	pthread_mutex_lock (&reqlock);
767
768	for (;;)
769	{
770	req = reqs;
771
772	if (reqs)
773	{
774	reqs = reqs->next;
775	if (!reqs) reqe = 0;
776	}
777
778	if (req)
779	break;
780
781	pthread_cond_wait (&reqwait, &reqlock);
782	}
783
784	pthread_mutex_unlock (&reqlock);
785
786	errno = 0; /* strictly unnecessary */
787
788	if (!req->cancelled)
789	switch (type = req->type) /* remember type for QUIT check */
790	{
791	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
792	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
793
794	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
795	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
796
797	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
798	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
799	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
800
801	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
802	case REQ_CLOSE: req->result = close (req->fd); break;
803	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
804	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
805	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
806	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
807	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
808
809	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
810	case REQ_FSYNC: req->result = fsync (req->fd); break;
811	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
812
813	case REQ_SLEEP:
814	{
815	struct timeval tv;
816
817	tv.tv_sec = req->fd;
818	tv.tv_usec = req->fd2;
819
820	req->result = select (0, 0, 0, 0, &tv);
821	}
822
823	case REQ_QUIT:
824	break;
825
826	default:
827	req->result = ENOSYS;
828	break;
829	}	1278	}
830		1279
831	req->errorno = errno;	1280	req->type = EIO_DUP2;
832		1281	req->int1 = close_fd;
833	pthread_mutex_lock (&reslock);	1282	req->sv2 = newSVsv (fh);
834
835	req->next = 0;	1283	req->int2 = fd;
836		1284
837	if (rese)	1285	REQ_SEND;
838	{
839	rese->next = req;
840	rese = req;
841	}
842	else
843	{
844	rese = ress = req;
845
846	/* write a dummy byte to the pipe so fh becomes ready */
847	write (respipe [1], &respipe, 1);
848	}
849
850	pthread_mutex_unlock (&reslock);
851	}
852	while (type != REQ_QUIT);
853
854	return 0;
855	}	1286	}
856		1287
857	/*****************************************************************************/
858
859	static void atfork_prepare (void)
860	{
861	pthread_mutex_lock (&reqlock);
862	pthread_mutex_lock (&reslock);
863	#if !HAVE_PREADWRITE
864	pthread_mutex_lock (&preadwritelock);
865	#endif
866	#if !HAVE_READDIR_R
867	pthread_mutex_lock (&readdirlock);
868	#endif
869	}
870
871	static void atfork_parent (void)
872	{
873	#if !HAVE_READDIR_R
874	pthread_mutex_unlock (&readdirlock);
875	#endif
876	#if !HAVE_PREADWRITE
877	pthread_mutex_unlock (&preadwritelock);
878	#endif
879	pthread_mutex_unlock (&reslock);
880	pthread_mutex_unlock (&reqlock);
881	}
882
883	static void atfork_child (void)
884	{
885	aio_req prv;
886
887	started = 0;
888
889	while (reqs)
890	{
891	prv = reqs;
892	reqs = prv->next;
893	req_free (prv);
894	}
895
896	reqs = reqe = 0;
897
898	while (ress)
899	{
900	prv = ress;
901	ress = prv->next;
902	req_free (prv);
903	}
904
905	ress = rese = 0;
906
907	close (respipe [0]);
908	close (respipe [1]);
909	create_pipe ();
910
911	atfork_parent ();
912	}
913
914	#define dREQ \
915	aio_req req; \
916	\
917	if (SvOK (callback) && !SvROK (callback)) \
918	croak ("callback must be undef or of reference type"); \
919	\
920	Newz (0, req, 1, aio_cb); \
921	if (!req) \
922	croak ("out of memory during aio_req allocation"); \
923	\
924	req->callback = newSVsv (callback)
925
926	#define REQ_SEND \
927	req_send (req); \
928	\
929	if (GIMME_V != G_VOID) \
930	XPUSHs (req_sv (req, AIO_REQ_KLASS));
931
932	MODULE = IO::AIO PACKAGE = IO::AIO
933
934	PROTOTYPES: ENABLE
935
936	BOOT:
937	{
938	HV *stash = gv_stashpv ("IO::AIO", 1);
939	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
940	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
941	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
942
943	create_pipe ();
944	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
945	}
946
947	void	1288	void
948	min_parallel (nthreads)	1289	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
949	int nthreads
950	PROTOTYPE: $
951
952	void
953	max_parallel (nthreads)
954	int nthreads
955	PROTOTYPE: $
956
957	int
958	max_outstanding (nreqs)
959	int nreqs
960	PROTOTYPE: $
961	CODE:	1290	PPCODE:
962	RETVAL = max_outstanding;
963	max_outstanding = nreqs;
964
965	void
966	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
967	SV * pathname
968	int flags
969	int mode
970	SV * callback
971	PROTOTYPE: $$$;$
972	PPCODE:
973	{	1291	{
		1292	int fd = s_fileno_croak (fh, 0);
974	dREQ;	1293	dREQ;
975		1294
976	req->type = REQ_OPEN;	1295	req->type = EIO_SEEK;
977	req->data = newSVsv (pathname);	1296	req->sv1 = newSVsv (fh);
978	req->dataptr = SvPVbyte_nolen (req->data);	1297	req->int1 = fd;
979	req->fd = flags;	1298	req->offs = SvVAL64 (offset);
980	req->mode = mode;	1299	req->int2 = whence;
981		1300
982	REQ_SEND;	1301	REQ_SEND;
983	}	1302	}
984		1303
985	void	1304	void
986	aio_close (fh,callback=&PL_sv_undef)	1305	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
987	SV * fh
988	SV * callback
989	PROTOTYPE: $;$
990	ALIAS:	1306	ALIAS:
991	aio_close = REQ_CLOSE
992	aio_fsync = REQ_FSYNC
993	aio_fdatasync = REQ_FDATASYNC
994	PPCODE:
995	{
996	dREQ;
997
998	req->type = ix;
999	req->fh = newSVsv (fh);
1000	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1001
1002	REQ_SEND (req);
1003	}
1004
1005	void
1006	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
1007	SV * fh
1008	UV offset
1009	UV length
1010	SV * data
1011	UV dataoffset
1012	SV * callback
1013	ALIAS:
1014	aio_read = REQ_READ	1307	aio_read = EIO_READ
1015	aio_write = REQ_WRITE	1308	aio_write = EIO_WRITE
1016	PROTOTYPE: $$$$$;$
1017	PPCODE:	1309	PPCODE:
1018	{	1310	{
1019	aio_req req;
1020	STRLEN svlen;	1311	STRLEN svlen;
		1312	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1021	char *svptr = SvPVbyte (data, svlen);	1313	char *svptr = SvPVbyte (data, svlen);
1022		1314	UV len = SvUV (length);
1023	SvUPGRADE (data, SVt_PV);
1024	SvPOK_on (data);
1025		1315
1026	if (dataoffset < 0)	1316	if (dataoffset < 0)
1027	dataoffset += svlen;	1317	dataoffset += svlen;
1028		1318
1029	if (dataoffset < 0 || dataoffset > svlen)	1319	if (dataoffset < 0 || dataoffset > svlen)
1030	croak ("data offset outside of string");	1320	croak ("dataoffset outside of data scalar");
1031		1321
1032	if (ix == REQ_WRITE)	1322	if (ix == EIO_WRITE)
1033	{	1323	{
1034	/* write: check length and adjust. */	1324	/* write: check length and adjust. */
1035	if (length < 0 || length + dataoffset > svlen)	1325	if (!SvOK (length) || len + dataoffset > svlen)
1036	length = svlen - dataoffset;	1326	len = svlen - dataoffset;
1037	}	1327	}
1038	else	1328	else
1039	{	1329	{
1040	/* read: grow scalar as necessary */	1330	/* read: check type and grow scalar as necessary */
		1331	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
1041	svptr = SvGROW (data, length + dataoffset);	1332	svptr = sv_grow (data, len + dataoffset + 1);
		1333	else if (SvCUR (data) < len + dataoffset)
		1334	croak ("length + dataoffset outside of scalar, and cannot grow");
1042	}	1335	}
1043
1044	if (length < 0)
1045	croak ("length must not be negative");
1046		1336
1047	{	1337	{
1048	dREQ;	1338	dREQ;
1049		1339
1050	req->type = ix;	1340	req->type = ix;
1051	req->fh = newSVsv (fh);	1341	req->sv1 = newSVsv (fh);
1052	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1342	req->int1 = fd;
1053	: IoOFP (sv_2io (fh)));	1343	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1054	req->offset = offset;	1344	req->size = len;
1055	req->length = length;
1056	req->data = SvREFCNT_inc (data);	1345	req->sv2 = SvREFCNT_inc (data);
1057	req->dataptr = (char *)svptr + dataoffset;	1346	req->ptr2 = (char *)svptr + dataoffset;
		1347	req->stroffset = dataoffset;
1058		1348
1059	if (!SvREADONLY (data))	1349	if (!SvREADONLY (data))
1060	{	1350	{
1061	SvREADONLY_on (data);	1351	SvREADONLY_on (data);
1062	req->data2ptr = (void *)data;	1352	req->flags |= FLAG_SV2_RO_OFF;
1063	}	1353	}
1064		1354
1065	REQ_SEND;	1355	REQ_SEND;
1066	}	1356	}
1067	}	1357	}
1068		1358
1069	void	1359	void
1070	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1360	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
1071	SV * out_fh	1361	ALIAS:
1072	SV * in_fh	1362	aio_ioctl = EIO_IOCTL
1073	UV in_offset	1363	aio_fcntl = EIO_FCNTL
1074	UV length
1075	SV * callback
1076	PROTOTYPE: $$$$;$
1077	PPCODE:	1364	PPCODE:
1078	{	1365	{
1079	dREQ;	1366	int fd = s_fileno_croak (fh, 0);
		1367	char *svptr;
1080		1368
1081	req->type = REQ_SENDFILE;	1369	if (SvPOK (arg) || !SvNIOK (arg))
1082	req->fh = newSVsv (out_fh);
1083	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1084	req->fh2 = newSVsv (in_fh);
1085	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1086	req->offset = in_offset;
1087	req->length = length;
1088
1089	REQ_SEND;
1090	}
1091
1092	void
1093	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
1094	SV * fh
1095	UV offset
1096	IV length
1097	SV * callback
1098	PROTOTYPE: $$$;$
1099	PPCODE:
1100	{
1101	dREQ;
1102
1103	req->type = REQ_READAHEAD;
1104	req->fh = newSVsv (fh);
1105	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
1106	req->offset = offset;
1107	req->length = length;
1108
1109	REQ_SEND;
1110	}
1111
1112	void
1113	aio_stat (fh_or_path,callback=&PL_sv_undef)
1114	SV * fh_or_path
1115	SV * callback
1116	ALIAS:
1117	aio_stat = REQ_STAT
1118	aio_lstat = REQ_LSTAT
1119	PPCODE:
1120	{
1121	dREQ;
1122
1123	New (0, req->statdata, 1, Stat_t);
1124	if (!req->statdata)
1125	{	1370	{
1126	req_free (req);	1371	STRLEN svlen;
1127	croak ("out of memory during aio_req->statdata allocation");	1372	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
1128	}	1373	#ifdef IOCPARM_LEN
		1374	STRLEN need = IOCPARM_LEN (request);
		1375	#else
		1376	STRLEN need = 256;
		1377	#endif
1129		1378
1130	if (SvPOK (fh_or_path))	1379	if (svlen < need)
1131	{	1380	svptr = SvGROW (arg, need);
1132	req->type = ix;
1133	req->data = newSVsv (fh_or_path);
1134	req->dataptr = SvPVbyte_nolen (req->data);
1135	}	1381	}
1136	else	1382	else
		1383	svptr = (char *)SvIV (arg);
		1384
1137	{	1385	{
		1386	dREQ;
		1387
1138	req->type = REQ_FSTAT;	1388	req->type = ix;
1139	req->fh = newSVsv (fh_or_path);	1389	req->sv1 = newSVsv (fh);
1140	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1390	req->int1 = fd;
		1391	req->int2 = (long)request;
		1392	req->sv2 = SvREFCNT_inc (arg);
		1393	req->ptr2 = svptr;
		1394
		1395	REQ_SEND;
1141	}	1396	}
		1397	}
		1398
		1399	void
		1400	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1401	ALIAS:
		1402	aio_readlink = EIO_READLINK
		1403	aio_realpath = EIO_REALPATH
		1404	PPCODE:
		1405	{
		1406	dREQ;
		1407
		1408	req->type = ix;
		1409	req_set_path1 (req, pathname);
1142		1410
1143	REQ_SEND;	1411	REQ_SEND;
1144	}	1412	}
1145		1413
1146	void	1414	void
1147	aio_unlink (pathname,callback=&PL_sv_undef)	1415	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
1148	SV * pathname	1416	PPCODE:
1149	SV * callback	1417	{
		1418	int ifd = s_fileno_croak (in_fh , 0);
		1419	int ofd = s_fileno_croak (out_fh, 1);
		1420	dREQ;
		1421
		1422	req->type = EIO_SENDFILE;
		1423	req->sv1 = newSVsv (out_fh);
		1424	req->int1 = ofd;
		1425	req->sv2 = newSVsv (in_fh);
		1426	req->int2 = ifd;
		1427	req->offs = in_offset;
		1428	req->size = length;
		1429
		1430	REQ_SEND;
		1431	}
		1432
		1433	void
		1434	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
		1435	PPCODE:
		1436	{
		1437	int fd = s_fileno_croak (fh, 0);
		1438	dREQ;
		1439
		1440	req->type = EIO_READAHEAD;
		1441	req->sv1 = newSVsv (fh);
		1442	req->int1 = fd;
		1443	req->offs = offset;
		1444	req->size = length;
		1445
		1446	REQ_SEND;
		1447	}
		1448
		1449	void
		1450	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
1150	ALIAS:	1451	ALIAS:
		1452	aio_stat = EIO_STAT
		1453	aio_lstat = EIO_LSTAT
		1454	aio_statvfs = EIO_STATVFS
		1455	PPCODE:
		1456	{
		1457	dREQ;
		1458
		1459	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1460
		1461	REQ_SEND;
		1462	}
		1463
		1464	UV
		1465	major (UV dev)
		1466	ALIAS:
		1467	minor = 1
		1468	CODE:
		1469	RETVAL = ix ? minor (dev) : major (dev);
		1470	OUTPUT:
		1471	RETVAL
		1472
		1473	UV
		1474	makedev (UV maj, UV min)
		1475	CODE:
		1476	RETVAL = makedev (maj, min);
		1477	OUTPUT:
		1478	RETVAL
		1479
		1480	void
		1481	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1482	PPCODE:
		1483	{
		1484	dREQ;
		1485
		1486	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1487	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1488	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1489
		1490	REQ_SEND;
		1491	}
		1492
		1493	void
		1494	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1495	PPCODE:
		1496	{
		1497	dREQ;
		1498
		1499	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1500	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1501
		1502	REQ_SEND;
		1503	}
		1504
		1505	void
		1506	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1507	PPCODE:
		1508	{
		1509	dREQ;
		1510
		1511	req->int2 = mode;
		1512	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1513
		1514	REQ_SEND;
		1515	}
		1516
		1517	void
		1518	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1519	PPCODE:
		1520	{
		1521	dREQ;
		1522
		1523	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1524	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1525	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1526
		1527	REQ_SEND;
		1528	}
		1529
		1530	void
		1531	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1532	PPCODE:
		1533	{
		1534	dREQ;
		1535
		1536	req->type = EIO_READDIR;
		1537	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1538
		1539	if (flags & EIO_READDIR_DENTS)
		1540	req->int1 |= EIO_READDIR_CUSTOM2;
		1541
		1542	req_set_path1 (req, pathname);
		1543
		1544	REQ_SEND;
		1545	}
		1546
		1547	void
		1548	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1549	PPCODE:
		1550	{
		1551	dREQ;
		1552
		1553	req->type = EIO_MKDIR;
		1554	req->int2 = mode;
		1555	req_set_path1 (req, pathname);
		1556
		1557	REQ_SEND;
		1558	}
		1559
		1560	void
		1561	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1562	ALIAS:
1151	aio_unlink = REQ_UNLINK	1563	aio_unlink = EIO_UNLINK
1152	aio_rmdir = REQ_RMDIR	1564	aio_rmdir = EIO_RMDIR
1153	aio_readdir = REQ_READDIR	1565	aio_readdir = EIO_READDIR
1154	PPCODE:	1566	PPCODE:
1155	{	1567	{
1156	dREQ;	1568	dREQ;
1157		1569
1158	req->type = ix;	1570	req->type = ix;
1159	req->data = newSVsv (pathname);	1571	req_set_path1 (req, pathname);
1160	req->dataptr = SvPVbyte_nolen (req->data);	1572
1161
1162	REQ_SEND;	1573	REQ_SEND;
1163	}	1574	}
1164		1575
1165	void	1576	void
1166	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1577	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
1167	SV * oldpath
1168	SV * newpath
1169	SV * callback
1170	ALIAS:	1578	ALIAS:
1171	aio_link = REQ_LINK	1579	aio_link = EIO_LINK
1172	aio_symlink = REQ_SYMLINK	1580	aio_symlink = EIO_SYMLINK
1173	aio_rename = REQ_RENAME	1581	aio_rename = EIO_RENAME
1174	PPCODE:	1582	PPCODE:
1175	{	1583	{
		1584	eio_wd wd2 = 0;
1176	dREQ;	1585	dREQ;
1177		1586
1178	req->type = ix;	1587	req->type = ix;
1179	req->fh = newSVsv (oldpath);	1588	req_set_path1 (req, oldpath);
1180	req->data2ptr = SvPVbyte_nolen (req->fh);	1589	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
1181	req->data = newSVsv (newpath);	1590	req->int3 = (long)wd2;
1182	req->dataptr = SvPVbyte_nolen (req->data);
1183		1591
1184	REQ_SEND;	1592	REQ_SEND;
1185	}	1593	}
1186		1594
1187	void	1595	void
1188	aio_sleep (delay,callback=&PL_sv_undef)	1596	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
1189	double delay
1190	SV * callback
1191	PPCODE:	1597	PPCODE:
1192	{	1598	{
1193	dREQ;	1599	dREQ;
1194		1600
1195	req->type = REQ_SLEEP;	1601	req->type = EIO_MKNOD;
1196	req->fd = delay < 0. ? 0 : delay;	1602	req->int2 = (mode_t)mode;
1197	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1603	req->offs = dev;
1198		1604	req_set_path1 (req, pathname);
		1605
1199	REQ_SEND;	1606	REQ_SEND;
1200	}	1607	}
1201		1608
1202	void	1609	void
1203	aio_group (callback=&PL_sv_undef)	1610	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback = &PL_sv_undef)
1204	SV * callback	1611	ALIAS:
1205	PROTOTYPE: ;$	1612	aio_mtouch = EIO_MTOUCH
		1613	aio_msync = EIO_MSYNC
1206	PPCODE:	1614	PPCODE:
1207	{	1615	{
		1616	STRLEN svlen;
		1617	char *svptr = SvPVbyte (data, svlen);
		1618	UV len = SvUV (length);
		1619
		1620	if (offset < 0)
		1621	offset += svlen;
		1622
		1623	if (offset < 0 || offset > svlen)
		1624	croak ("offset outside of scalar");
		1625
		1626	if (!SvOK (length) || len + offset > svlen)
		1627	len = svlen - offset;
		1628
		1629	{
		1630	dREQ;
		1631
		1632	req->type = ix;
		1633	req->sv2 = SvREFCNT_inc (data);
		1634	req->ptr2 = (char *)svptr + offset;
		1635	req->size = len;
		1636	req->int1 = flags;
		1637
		1638	REQ_SEND;
		1639	}
		1640	}
		1641
		1642	void
		1643	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1644	PPCODE:
		1645	{
		1646	STRLEN svlen;
		1647	char *svptr = SvPVbyte (data, svlen);
		1648	UV len = SvUV (length);
		1649
		1650	if (offset < 0)
		1651	offset += svlen;
		1652
		1653	if (offset < 0 || offset > svlen)
		1654	croak ("offset outside of scalar");
		1655
		1656	if (!SvOK (length) || len + offset > svlen)
		1657	len = svlen - offset;
		1658
		1659	{
		1660	dREQ;
		1661
		1662	req->type = EIO_MLOCK;
		1663	req->sv2 = SvREFCNT_inc (data);
		1664	req->ptr2 = (char *)svptr + offset;
		1665	req->size = len;
		1666
		1667	REQ_SEND;
		1668	}
		1669	}
		1670
		1671	void
		1672	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1673	PPCODE:
		1674	{
		1675	dREQ;
		1676
		1677	req->type = EIO_MLOCKALL;
		1678	req->int1 = flags;
		1679
		1680	REQ_SEND;
		1681	}
		1682
		1683	void
		1684	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1685	PPCODE:
		1686	{
		1687	int fd = s_fileno_croak (fh, 0);
1208	dREQ;	1688	dREQ;
		1689
		1690	req->type = EIO_CUSTOM;
		1691	req->sv1 = newSVsv (fh);
		1692	req->int1 = fd;
		1693
		1694	req->feed = fiemap;
		1695	#if HAVE_FIEMAP
		1696	/* keep our fingers crossed that the next two types are 64 bit */
		1697	req->offs = start;
		1698	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1699	req->int2 = flags;
		1700	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1701	#endif
		1702
		1703	REQ_SEND;
		1704	}
		1705
		1706	void
		1707	aio_busy (double delay, SV *callback = &PL_sv_undef)
		1708	PPCODE:
		1709	{
		1710	dREQ;
		1711
		1712	req->type = EIO_BUSY;
		1713	req->nv1 = delay < 0. ? 0. : delay;
		1714
		1715	REQ_SEND;
		1716	}
		1717
		1718	void
		1719	aio_group (SV *callback = &PL_sv_undef)
		1720	PPCODE:
		1721	{
		1722	dREQ;
		1723
1209	req->type = REQ_GROUP;	1724	req->type = EIO_GROUP;
		1725
		1726	PUTBACK;
1210	req_send (req);	1727	req_submit (req);
		1728	SPAGAIN;
		1729
1211	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1730	XPUSHs (req_sv (req, aio_grp_stash));
1212	}	1731	}
		1732
		1733	void
		1734	aio_nop (SV *callback = &PL_sv_undef)
		1735	ALIAS:
		1736	aio_nop = EIO_NOP
		1737	aio_sync = EIO_SYNC
		1738	PPCODE:
		1739	{
		1740	dREQ;
		1741
		1742	req->type = ix;
		1743
		1744	REQ_SEND;
		1745	}
		1746
		1747	int
		1748	aioreq_pri (int pri = NO_INIT)
		1749	CODE:
		1750	RETVAL = next_pri;
		1751	if (items > 0)
		1752	{
		1753	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1754	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1755	next_pri = pri;
		1756	}
		1757	OUTPUT:
		1758	RETVAL
		1759
		1760	void
		1761	aioreq_nice (int nice = 0)
		1762	CODE:
		1763	nice = next_pri - nice;
		1764	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1765	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1766	next_pri = nice;
1213		1767
1214	void	1768	void
1215	flush ()	1769	flush ()
1216	PROTOTYPE:
1217	CODE:	1770	CODE:
1218	while (nreqs)	1771	while (eio_nreqs ())
1219	{	1772	{
1220	poll_wait ();	1773	poll_wait ();
1221	poll_cb ();	1774	poll_cb ();
1222	}	1775	}
1223		1776
1224	void	1777	int
1225	poll()	1778	poll ()
1226	PROTOTYPE:
1227	CODE:	1779	CODE:
1228	if (nreqs)
1229	{
1230	poll_wait ();	1780	poll_wait ();
1231	poll_cb ();	1781	RETVAL = poll_cb ();
1232	}
1233
1234	int
1235	poll_fileno()
1236	PROTOTYPE:
1237	CODE:
1238	RETVAL = respipe [0];
1239	OUTPUT:	1782	OUTPUT:
1240	RETVAL	1783	RETVAL
1241		1784
1242	int	1785	int
		1786	poll_fileno ()
		1787	CODE:
		1788	RETVAL = s_epipe_fd (&respipe);
		1789	OUTPUT:
		1790	RETVAL
		1791
		1792	int
1243	poll_cb(...)	1793	poll_cb (...)
1244	PROTOTYPE:	1794	PROTOTYPE:
1245	CODE:	1795	CODE:
1246	RETVAL = poll_cb ();	1796	RETVAL = poll_cb ();
1247	OUTPUT:	1797	OUTPUT:
1248	RETVAL	1798	RETVAL
1249		1799
1250	void	1800	void
1251	poll_wait()	1801	poll_wait ()
1252	PROTOTYPE:
1253	CODE:	1802	CODE:
1254	if (nreqs)
1255	poll_wait ();	1803	poll_wait ();
1256		1804
1257	int	1805	int
1258	nreqs()	1806	nreqs ()
1259	PROTOTYPE:
1260	CODE:	1807	CODE:
1261	RETVAL = nreqs;	1808	RETVAL = eio_nreqs ();
1262	OUTPUT:	1809	OUTPUT:
1263	RETVAL	1810	RETVAL
1264		1811
		1812	int
		1813	nready ()
		1814	CODE:
		1815	RETVAL = eio_nready ();
		1816	OUTPUT:
		1817	RETVAL
		1818
		1819	int
		1820	npending ()
		1821	CODE:
		1822	RETVAL = eio_npending ();
		1823	OUTPUT:
		1824	RETVAL
		1825
		1826	int
		1827	nthreads ()
		1828	CODE:
		1829	RETVAL = eio_nthreads ();
		1830	OUTPUT:
		1831	RETVAL
		1832
		1833	int
		1834	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1835	CODE:
		1836	RETVAL = posix_fadvise (fh, offset, length, advice);
		1837	OUTPUT:
		1838	RETVAL
		1839
		1840	IV
		1841	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1842	CODE:
		1843	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1844	OUTPUT:
		1845	RETVAL
		1846
		1847	void
		1848	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1849	PPCODE:
		1850	sv_unmagic (scalar, MMAP_MAGIC);
		1851	{
		1852	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1853	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1854	if (addr == (void *)-1)
		1855	XSRETURN_NO;
		1856
		1857	sv_force_normal (scalar);
		1858
		1859	/* we store the length in mg_obj, as namlen is I32 :/ */
		1860	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1861	->mg_obj = (SV *)length;
		1862
		1863	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1864
		1865	if (!(prot & PROT_WRITE))
		1866	SvREADONLY_on (scalar);
		1867
		1868	if (SvLEN (scalar))
		1869	Safefree (SvPVX (scalar));
		1870
		1871	SvPVX (scalar) = (char *)addr;
		1872	SvCUR_set (scalar, length);
		1873	SvLEN_set (scalar, 0);
		1874	SvPOK_only (scalar);
		1875
		1876	XSRETURN_YES;
		1877	}
		1878
		1879	void
		1880	munmap (SV *scalar)
		1881	CODE:
		1882	sv_unmagic (scalar, MMAP_MAGIC);
		1883
		1884	int
		1885	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1886	ALIAS:
		1887	mprotect = 1
		1888	CODE:
		1889	{
		1890	STRLEN svlen;
		1891	void *addr = SvPVbyte (scalar, svlen);
		1892	STRLEN len = SvUV (length);
		1893
		1894	if (offset < 0)
		1895	offset += svlen;
		1896
		1897	if (offset < 0 || offset > svlen)
		1898	croak ("offset outside of scalar");
		1899
		1900	if (!SvOK (length) || len + offset > svlen)
		1901	len = svlen - offset;
		1902
		1903	addr = (void *)(((intptr_t)addr) + offset);
		1904	eio_page_align (&addr, &len);
		1905
		1906	switch (ix)
		1907	{
		1908	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1909	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1910	}
		1911	}
		1912	OUTPUT:
		1913	RETVAL
		1914
		1915	int
		1916	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		1917	CODE:
		1918	{
		1919	STRLEN svlen;
		1920	void *addr = SvPVbyte (scalar, svlen);
		1921	size_t len = SvUV (length);
		1922
		1923	if (offset < 0)
		1924	offset += svlen;
		1925
		1926	if (offset < 0 || offset > svlen)
		1927	croak ("offset outside of scalar");
		1928
		1929	if (!SvOK (length) || len + offset > svlen)
		1930	len = svlen - offset;
		1931
		1932	addr = (void *)(((intptr_t)addr) + offset);
		1933	eio_page_align (&addr, &len);
		1934	#if _POSIX_MEMLOCK_RANGE
		1935	RETVAL = munlock (addr, len);
		1936	#else
		1937	RETVAL = EIO_ENOSYS ();
		1938	#endif
		1939	}
		1940	OUTPUT:
		1941	RETVAL
		1942
		1943	int
		1944	munlockall ()
		1945	CODE:
		1946	#if _POSIX_MEMLOCK
		1947	munlockall ();
		1948	#else
		1949	RETVAL = EIO_ENOSYS ();
		1950	#endif
		1951	OUTPUT:
		1952	RETVAL
		1953
		1954	int
		1955	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1956	CODE:
		1957	{
		1958	#if HAVE_LINUX_SPLICE
		1959	loff_t off_in_, off_out_;
		1960	RETVAL = splice (
		1961	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1962	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1963	length, flags
		1964	);
		1965	#else
		1966	RETVAL = EIO_ENOSYS ();
		1967	#endif
		1968	}
		1969	OUTPUT:
		1970	RETVAL
		1971
		1972	int
		1973	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		1974	CODE:
		1975	#if HAVE_LINUX_SPLICE
		1976	RETVAL = tee (rfh, wfh, length, flags);
		1977	#else
		1978	RETVAL = EIO_ENOSYS ();
		1979	#endif
		1980	OUTPUT:
		1981	RETVAL
		1982
		1983	int
		1984	pipesize (aio_rfd rfh, int new_size = -1)
		1985	PROTOTYPE: $;$
		1986	CODE:
		1987	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		1988	if (new_size >= 0)
		1989	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		1990	else
		1991	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		1992	#else
		1993	errno = ENOSYS;
		1994	RETVAL = -1;
		1995	#endif
		1996	OUTPUT:
		1997	RETVAL
		1998
		1999	void
		2000	pipe2 (int flags = 0)
		2001	PROTOTYPE: ;$
		2002	PPCODE:
		2003	{
		2004	int fd[2];
		2005	int res;
		2006
		2007	if (flags)
		2008	#if HAVE_PIPE2
		2009	res = pipe2 (fd, flags);
		2010	#else
		2011	res = (errno = ENOSYS, -1);
		2012	#endif
		2013	else
		2014	res = pipe (fd);
		2015
		2016	if (!res)
		2017	{
		2018	EXTEND (SP, 2);
		2019	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2020	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2021	}
		2022	}
		2023
		2024	void _on_next_submit (SV *cb)
		2025	CODE:
		2026	SvREFCNT_dec (on_next_submit);
		2027	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2028
1265	PROTOTYPES: DISABLE	2029	PROTOTYPES: DISABLE
1266		2030
		2031	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2032
		2033	BOOT:
		2034	{
		2035	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2036	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2037	}
		2038
		2039	void
		2040	DESTROY (SV *self)
		2041	CODE:
		2042	{
		2043	aio_wd wd = SvAIO_WD (self);
		2044	#if HAVE_AT
		2045	{
		2046	SV *callback = &PL_sv_undef;
		2047	dREQ; /* clobbers next_pri :/ */
		2048	next_pri = req->pri; /* restore next_pri */
		2049	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2050	req->type = EIO_WD_CLOSE;
		2051	req->wd = wd;
		2052	REQ_SEND;
		2053	}
		2054	#else
		2055	eio_wd_close_sync (wd);
		2056	#endif
		2057	}
		2058
1267	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	2059	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1268		2060
1269	void	2061	void
1270	cancel (aio_req_ornot req)	2062	cancel (aio_req_ornot req)
1271	PROTOTYPE:
1272	CODE:	2063	CODE:
1273	req_cancel (req);	2064	eio_cancel (req);
		2065
		2066	void
		2067	cb (aio_req_ornot req, SV *callback = NO_INIT)
		2068	PPCODE:
		2069	{
		2070	if (GIMME_V != G_VOID)
		2071	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2072
		2073	if (items > 1)
		2074	{
		2075	SV *cb_cv = get_cb (callback);
		2076
		2077	SvREFCNT_dec (req->callback);
		2078	req->callback = SvREFCNT_inc (cb_cv);
		2079	}
		2080	}
1274		2081
1275	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	2082	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1276		2083
1277	void	2084	void
1278	add (aio_req grp, ...)	2085	add (aio_req grp, ...)
1279	PPCODE:	2086	PPCODE:
1280	{	2087	{
1281	int i;	2088	int i;
1282		2089
1283	if (grp->fd == 2)	2090	if (grp->int1 == 2)
1284	croak ("cannot add requests to IO::AIO::GRP after the group finished");	2091	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1285		2092
1286	for (i = 1; i < items; ++i )	2093	for (i = 1; i < items; ++i )
1287	{	2094	{
		2095	aio_req req;
		2096
1288	if (GIMME_V != G_VOID)	2097	if (GIMME_V != G_VOID)
1289	XPUSHs (sv_2mortal (newSVsv (ST (i))));	2098	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1290		2099
1291	aio_req req = SvAIO_REQ (ST (i));	2100	req = SvAIO_REQ (ST (i));
1292		2101
1293	if (req)	2102	if (req)
1294	{	2103	eio_grp_add (grp, req);
1295	++grp->length;
1296	req->grp = grp;
1297
1298	req->grp_prev = 0;
1299	req->grp_next = grp->grp_first;
1300
1301	if (grp->grp_first)
1302	grp->grp_first->grp_prev = req;
1303
1304	grp->grp_first = req;
1305	}
1306	}	2104	}
1307	}	2105	}
1308		2106
1309	void	2107	void
1310	lock (aio_req grp)	2108	cancel_subs (aio_req_ornot req)
1311	CODE:	2109	CODE:
1312	++grp->length;	2110	req_cancel_subs (req);
1313		2111
1314	void	2112	void
1315	unlock (aio_req grp)	2113	result (aio_req grp, ...)
		2114	CODE:
		2115	{
		2116	int i;
		2117	AV *av;
		2118
		2119	grp->errorno = errno;
		2120
		2121	av = newAV ();
		2122	av_extend (av, items - 1);
		2123
		2124	for (i = 1; i < items; ++i )
		2125	av_push (av, newSVsv (ST (i)));
		2126
		2127	SvREFCNT_dec (grp->sv1);
		2128	grp->sv1 = (SV *)av;
		2129	}
		2130
		2131	void
		2132	errno (aio_req grp, int errorno = errno)
		2133	CODE:
		2134	grp->errorno = errorno;
		2135
		2136	void
		2137	limit (aio_req grp, int limit)
1316	CODE:	2138	CODE:
1317	aio_grp_dec (grp);	2139	eio_grp_limit (grp, limit);
1318		2140
1319	void	2141	void
1320	feeder_limit (aio_req grp, int limit)	2142	feed (aio_req grp, SV *callback = &PL_sv_undef)
1321	CODE:	2143	CODE:
1322	grp->fd2 = limit;
1323	aio_grp_feed (grp);
1324
1325	void
1326	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
1327	CODE:
1328	{	2144	{
1329	SvREFCNT_dec (grp->fh2);	2145	SvREFCNT_dec (grp->sv2);
1330	grp->fh2 = newSVsv (callback);	2146	grp->sv2 = newSVsv (callback);
		2147	grp->feed = aio_grp_feed;
1331		2148
1332	if (grp->fd2 <= 0)	2149	if (grp->int2 <= 0)
1333	grp->fd2 = 2;	2150	grp->int2 = 2;
1334		2151
1335	aio_grp_feed (grp);	2152	eio_grp_limit (grp, grp->int2);
1336	}	2153	}
1337		2154

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