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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.49 by root, Sun Oct 22 13:33:28 2006 UTC vs.
Revision 1.179 by root, Fri Jan 7 21:47:15 2011 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	14	#include <sys/types.h>
17	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
18	#include <limits.h>	17	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	18	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	19	#include <sched.h>
23		20
24	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
25	# if __linux
26	# include <sys/sendfile.h>	22	# include <sys/mman.h>
27	# elif __freebsd	23	#endif
28	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
29	# include <sys/uio.h>	68	# include <sys/time.h>
30	# elif __hpux
31	# include <sys/socket.h>
32	# elif __solaris /* not yet */
33	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		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;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	#ifndef POSIX_FADV_NORMAL
		127	# define POSIX_FADV_NORMAL 0
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#if !HAVE_POSIX_FADVISE
		146	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		147	#endif
		148
		149	#ifndef POSIX_MADV_NORMAL
		150	# define POSIX_MADV_NORMAL 0
		151	#endif
		152	#ifndef POSIX_MADV_SEQUENTIAL
		153	# define POSIX_MADV_SEQUENTIAL 0
		154	#endif
		155	#ifndef POSIX_MADV_RANDOM
		156	# define POSIX_MADV_RANDOM 0
		157	#endif
		158	#ifndef POSIX_MADV_WILLNEED
		159	# define POSIX_MADV_WILLNEED 0
		160	#endif
		161	#ifndef POSIX_MADV_DONTNEED
		162	# define POSIX_MADV_DONTNEED 0
		163	#endif
		164
		165	#if !HAVE_POSIX_MADVISE
		166	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		167	#endif
		168
		169	#ifndef PROT_NONE
		170	# define PROT_NONE 0
		171	#endif
		172	#ifndef PROT_READ
		173	# define PROT_READ 0
		174	#endif
		175	#ifndef PROT_WRITE
		176	# define PROT_READ 0
		177	#endif
		178	#ifndef PROT_EXEC
		179	# define PROT_EXEC 0
		180	#endif
		181
		182	#ifndef ST_NODEV
		183	# define ST_NODEV 0
		184	#endif
		185	#ifndef ST_NOEXEC
		186	# define ST_NOEXEC 0
		187	#endif
		188	#ifndef ST_SYNCHRONOUS
		189	# define ST_SYNCHRONOUS 0
		190	#endif
		191	#ifndef ST_MANDLOCK
		192	# define ST_MANDLOCK 0
		193	#endif
		194	#ifndef ST_WRITE
		195	# define ST_WRITE 0
		196	#endif
		197	#ifndef ST_APPEND
		198	# define ST_APPEND 0
		199	#endif
		200	#ifndef ST_IMMUTABLE
		201	# define ST_IMMUTABLE 0
		202	#endif
		203	#ifndef ST_NOATIME
		204	# define ST_NOATIME 0
		205	#endif
		206	#ifndef ST_NODIRATIME
		207	# define ST_NODIRATIME 0
		208	#endif
		209	#ifndef ST_RELATIME
		210	# define ST_RELATIME 0
		211	#endif
		212
		213	#ifndef MAP_ANONYMOUS
		214	# ifdef MAP_ANON
		215	# define MAP_ANONYMOUS MAP_ANON
34	# else	216	# else
35	# error sendfile support requested but not available	217	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	218	# endif
37	#endif	219	#endif
38		220	#ifndef MAP_HUGETLB
39	/* used for struct dirent, AIX doesn't provide it */	221	# define MAP_HUGETLB 0
40	#ifndef NAME_MAX
41	# define NAME_MAX 4096
42	#endif	222	#endif
43		223	#ifndef MAP_LOCKED
44	#if __ia64	224	# define MAP_LOCKED 0
45	# define STACKSIZE 65536
46	#else
47	# define STACKSIZE 8192
48	#endif	225	#endif
		226	#ifndef MAP_NORESERVE
		227	# define MAP_NORESERVE 0
		228	#endif
		229	#ifndef MAP_POPULATE
		230	# define MAP_POPULATE 0
		231	#endif
		232	#ifndef MAP_NONBLOCK
		233	# define MAP_NONBLOCK 0
		234	#endif
		235
		236	#ifndef PAGESIZE
		237	# define PAGESIZE sysconf (_SC_PAGESIZE)
		238	#endif
		239
		240	static int req_invoke (eio_req *req);
		241	#define EIO_FINISH(req) req_invoke (req)
		242	static void req_destroy (eio_req *grp);
		243	#define EIO_DESTROY(req) req_destroy (req)
49		244
50	enum {	245	enum {
51	REQ_QUIT,	246	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	};	247	};
63		248
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	249	#include "libeio/eio.c"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		250
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;	251	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	252	typedef eio_req *aio_req_ornot;
93		253
94	static int started, wanted;	254	static SV *on_next_submit;
95	static volatile int nreqs;	255	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	256	static int max_outstanding;
97	static int respipe [2];
98		257
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	258	static s_epipe respipe;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		259
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	260	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_free (aio_req req);	261	static void req_cancel (aio_req req);
		262
		263	static void want_poll (void)
		264	{
		265	/* write a dummy byte to the pipe so fh becomes ready */
		266	s_epipe_signal (&respipe);
		267	}
		268
		269	static void done_poll (void)
		270	{
		271	/* read any signals sent by the worker threads */
		272	s_epipe_drain (&respipe);
		273	}
107		274
108	/* must be called at most once */	275	/* must be called at most once */
109	static SV *req_sv (aio_req req, const char *klass)	276	static SV *req_sv (aio_req req, HV *stash)
110	{	277	{
111	if (!req->self)	278	if (!req->self)
112	{	279	{
113	req->self = (SV *)newHV ();	280	req->self = (SV *)newHV ();
114	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	281	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
115	}	282	}
116		283
117	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	284	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
118	}	285	}
119		286
120	static aio_req SvAIO_REQ (SV *sv)	287	static aio_req SvAIO_REQ (SV *sv)
121	{	288	{
122	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	289	MAGIC *mg;
		290
		291	if (!SvROK (sv)
		292	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		293	&& SvSTASH (SvRV (sv)) != aio_req_stash
		294	&& !sv_derived_from (sv, "IO::AIO::REQ")))
123	croak ("object of class " AIO_REQ_KLASS " expected");	295	croak ("object of class IO::AIO::REQ expected");
124		296
125	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	297	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
126		298
127	return mg ? (aio_req)mg->mg_ptr : 0;	299	return mg ? (aio_req)mg->mg_ptr : 0;
128	}	300	}
129		301
130	static void aio_grp_feed (aio_req grp)	302	static void aio_grp_feed (aio_req grp)
131	{	303	{
132	while (grp->length < grp->fd2)	304	if (grp->sv2 && SvOK (grp->sv2))
133	{	305	{
134	int old_len = grp->length;	306	dSP;
135		307
136	if (grp->fh2 && SvOK (grp->fh2))	308	ENTER;
		309	SAVETMPS;
		310	PUSHMARK (SP);
		311	XPUSHs (req_sv (grp, aio_grp_stash));
		312	PUTBACK;
		313	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		314	SPAGAIN;
		315	FREETMPS;
		316	LEAVE;
		317	}
		318	}
		319
		320	static void req_submit (eio_req *req)
		321	{
		322	eio_submit (req);
		323
		324	if (expect_false (on_next_submit))
		325	{
		326	dSP;
		327	SV *cb = sv_2mortal (on_next_submit);
		328
		329	on_next_submit = 0;
		330
		331	PUSHMARK (SP);
		332	PUTBACK;
		333	call_sv (cb, G_DISCARD | G_EVAL);
		334	}
		335	}
		336
		337	static int req_invoke (eio_req *req)
		338	{
		339	if (req->flags & FLAG_SV2_RO_OFF)
		340	SvREADONLY_off (req->sv2);
		341
		342	if (!EIO_CANCELLED (req) && req->callback)
		343	{
		344	dSP;
		345	static SV *sv_result_cache; /* caches the result integer SV */
		346	SV *sv_result;
		347
		348	ENTER;
		349	SAVETMPS;
		350	PUSHMARK (SP);
		351	EXTEND (SP, 1);
		352
		353	/* do not recreate the result IV from scratch each time */
		354	if (expect_true (sv_result_cache))
137	{	355	{
138	dSP;	356	sv_result = sv_result_cache; sv_result_cache = 0;
139		357	SvIV_set (sv_result, req->result);
140	ENTER;	358	SvIOK_only (sv_result);
141	SAVETMPS;
142	PUSHMARK (SP);
143	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
144	PUTBACK;
145	call_sv (grp->fh2, G_VOID | G_EVAL);
146	SPAGAIN;
147	FREETMPS;
148	LEAVE;
149	}	359	}
150		360	else
151	/* stop if no progress has been made */
152	if (old_len == grp->length)
153	{	361	{
154	SvREFCNT_dec (grp->fh2);	362	sv_result = newSViv (req->result);
155	grp->fh2 = 0;	363	SvREADONLY_on (sv_result);
156	break;
157	}	364	}
		365
		366	switch (req->type)
		367	{
		368	case EIO_READDIR:
		369	{
		370	SV *rv = &PL_sv_undef;
		371
		372	if (req->result >= 0)
		373	{
		374	int i;
		375	char *names = (char *)req->ptr2;
		376	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		377	AV *av = newAV ();
		378
		379	av_extend (av, req->result - 1);
		380
		381	for (i = 0; i < req->result; ++i)
		382	{
		383	if (req->int1 & EIO_READDIR_DENTS)
		384	{
		385	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		386
		387	if (req->int1 & EIO_READDIR_CUSTOM2)
		388	{
		389	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		390	AV *avent = newAV ();
		391
		392	av_extend (avent, 2);
		393
		394	if (!sv_type [ent->type])
		395	{
		396	sv_type [ent->type] = newSViv (ent->type);
		397	SvREADONLY_on (sv_type [ent->type]);
		398	}
		399
		400	av_store (avent, 0, namesv);
		401	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		402	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		403
		404	av_store (av, i, newRV_noinc ((SV *)avent));
		405	}
		406	else
		407	av_store (av, i, namesv);
		408
		409	++ent;
		410	}
		411	else
		412	{
		413	SV *name = newSVpv (names, 0);
		414	av_store (av, i, name);
		415	names += SvCUR (name) + 1;
		416	}
		417	}
		418
		419	rv = sv_2mortal (newRV_noinc ((SV *)av));
		420	}
		421
		422	PUSHs (rv);
		423
		424	if (req->int1 & EIO_READDIR_CUSTOM1)
		425	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		426	}
		427	break;
		428
		429	case EIO_OPEN:
		430	{
		431	/* convert fd to fh */
		432	SV *fh = &PL_sv_undef;
		433
		434	if (req->result >= 0)
		435	{
		436	GV *gv = (GV *)sv_newmortal ();
		437	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		438	char sym [64];
		439	int symlen;
		440
		441	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		442	gv_init (gv, aio_stash, sym, symlen, 0);
		443
		444	symlen = snprintf (
		445	sym,
		446	sizeof (sym),
		447	"%s&=%d",
		448	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		449	(int)req->result
		450	);
		451
		452	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		453	fh = (SV *)gv;
		454	}
		455
		456	PUSHs (fh);
		457	}
		458	break;
		459
		460	case EIO_STATVFS:
		461	case EIO_FSTATVFS:
		462	{
		463	SV *rv = &PL_sv_undef;
		464
		465	if (req->result >= 0)
		466	{
		467	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		468	HV *hv = newHV ();
		469
		470	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		471
		472	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		473	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		474	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		475	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		476	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		477	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		478	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		479	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		480	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		481	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		482	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		483	}
		484
		485	PUSHs (rv);
		486	}
		487
		488	break;
		489
		490	case EIO_GROUP:
		491	req->int1 = 2; /* mark group as finished */
		492
		493	if (req->sv1)
		494	{
		495	int i;
		496	AV *av = (AV *)req->sv1;
		497
		498	EXTEND (SP, AvFILL (av) + 1);
		499	for (i = 0; i <= AvFILL (av); ++i)
		500	PUSHs (*av_fetch (av, i, 0));
		501	}
		502	break;
		503
		504	case EIO_NOP:
		505	case EIO_BUSY:
		506	break;
		507
		508	case EIO_READLINK:
		509	if (req->result > 0)
		510	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		511	break;
		512
		513	case EIO_STAT:
		514	case EIO_LSTAT:
		515	case EIO_FSTAT:
		516	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		517	PL_laststatval = req->result;
		518	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		519	PUSHs (sv_result);
		520	break;
		521
		522	case EIO_READ:
		523	{
		524	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		525	*SvEND (req->sv2) = 0;
		526	SvPOK_only (req->sv2);
		527	SvSETMAGIC (req->sv2);
		528	PUSHs (sv_result);
		529	}
		530	break;
		531
		532	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		533	if (req->result > 0)
		534	SvIV_set (sv_result, 0);
		535	/* FALLTHROUGH */
		536
		537	default:
		538	PUSHs (sv_result);
		539	break;
		540	}
		541
		542	errno = req->errorno;
		543
		544	PUTBACK;
		545	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		546	SPAGAIN;
		547
		548	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		549	SvREFCNT_dec (sv_result);
		550	else
		551	sv_result_cache = sv_result;
		552
		553	FREETMPS;
		554	LEAVE;
		555
		556	PUTBACK;
158	}	557	}
159	}
160		558
161	static void poll_wait ()	559	return !!SvTRUE (ERRSV);
162	{
163	if (nreqs && !ress)
164	{
165	fd_set rfd;
166	FD_ZERO(&rfd);
167	FD_SET(respipe [0], &rfd);
168
169	select (respipe [0] + 1, &rfd, 0, 0, 0);
170	}
171	}	560	}
172		561
173	static void req_invoke (aio_req req)
174	{
175	dSP;
176	int errorno = errno;
177
178	if (req->cancelled || !SvOK (req->callback))
179	return;
180
181	errno = req->errorno;
182
183	ENTER;
184	SAVETMPS;
185	PUSHMARK (SP);
186	EXTEND (SP, 1);
187
188	switch (req->type)
189	{
190	case REQ_READDIR:
191	{
192	SV *rv = &PL_sv_undef;
193
194	if (req->result >= 0)
195	{
196	char *buf = req->data2ptr;
197	AV *av = newAV ();
198
199	while (req->result)
200	{
201	SV *sv = newSVpv (buf, 0);
202
203	av_push (av, sv);
204	buf += SvCUR (sv) + 1;
205	req->result--;
206	}
207
208	rv = sv_2mortal (newRV_noinc ((SV *)av));
209	}
210
211	PUSHs (rv);
212	}
213	break;
214
215	case REQ_OPEN:
216	{
217	/* convert fd to fh */
218	SV *fh;
219
220	PUSHs (sv_2mortal (newSViv (req->result)));
221	PUTBACK;
222	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
223	SPAGAIN;
224
225	fh = SvREFCNT_inc (POPs);
226
227	PUSHMARK (SP);
228	XPUSHs (sv_2mortal (fh));
229	}
230	break;
231
232	case REQ_GROUP:
233	req->fd = 2; /* mark group as finished */
234
235	if (req->data)
236	{
237	int i;
238	AV *av = (AV *)req->data;
239
240	EXTEND (SP, AvFILL (av) + 1);
241	for (i = 0; i <= AvFILL (av); ++i)
242	PUSHs (*av_fetch (av, i, 0));
243	}
244	break;
245
246	case REQ_SLEEP:
247	break;
248
249	default:
250	PUSHs (sv_2mortal (newSViv (req->result)));
251	break;
252	}
253
254
255	PUTBACK;
256	call_sv (req->callback, G_VOID | G_EVAL);
257	SPAGAIN;
258
259	if (SvTRUE (ERRSV))
260	{
261	req_free (req);
262	croak (0);
263	}
264
265	FREETMPS;
266	LEAVE;
267
268	errno = errorno;
269	}
270
271	static void req_free (aio_req req)	562	static void req_destroy (aio_req req)
272	{	563	{
273	if (req->grp)
274	{
275	aio_req grp = req->grp;
276
277	/* unlink request */
278	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
279	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
280
281	if (grp->grp_first == req)
282	grp->grp_first = req->grp_next;
283
284	--grp->length;
285
286	/* call feeder, if applicable */
287	aio_grp_feed (grp);
288
289	/* finish, if done */
290	if (!grp->length && grp->fd)
291	{
292	req_invoke (grp);
293	req_free (grp);
294	}
295	}
296
297	if (req->self)	564	if (req->self)
298	{	565	{
299	sv_unmagic (req->self, PERL_MAGIC_ext);	566	sv_unmagic (req->self, PERL_MAGIC_ext);
300	SvREFCNT_dec (req->self);	567	SvREFCNT_dec (req->self);
301	}	568	}
302		569
303	SvREFCNT_dec (req->data);
304	SvREFCNT_dec (req->fh);	570	SvREFCNT_dec (req->sv1);
305	SvREFCNT_dec (req->fh2);	571	SvREFCNT_dec (req->sv2);
306	SvREFCNT_dec (req->callback);	572	SvREFCNT_dec (req->callback);
307	Safefree (req->statdata);
308
309	if (req->type == REQ_READDIR && req->result >= 0)
310	free (req->data2ptr);
311		573
312	Safefree (req);	574	Safefree (req);
313	}	575	}
314		576
315	static void req_cancel (aio_req req)	577	static void req_cancel_subs (aio_req grp)
316	{	578	{
317	req->cancelled = 1;	579	aio_req sub;
318		580
319	if (req->type == REQ_GROUP)	581	if (grp->type != EIO_GROUP)
		582	return;
		583
		584	SvREFCNT_dec (grp->sv2);
		585	grp->sv2 = 0;
		586
		587	eio_grp_cancel (grp);
		588	}
		589
		590	static void
		591	create_respipe (void)
		592	{
		593	if (s_epipe_renew (&respipe))
		594	croak ("IO::AIO: unable to initialize result pipe");
		595	}
		596
		597	static void poll_wait (void)
		598	{
		599	while (eio_nreqs ())
320	{	600	{
321	aio_req sub;	601	int size;
322		602
323	for (sub = req->grp_first; sub; sub = sub->grp_next)	603	X_LOCK (reslock);
324	req_cancel (sub);	604	size = res_queue.size;
		605	X_UNLOCK (reslock);
		606
		607	if (size)
		608	return;
		609
		610	etp_maybe_start_thread ();
		611
		612	s_epipe_wait (&respipe);
325	}	613	}
326	}	614	}
327		615
328	static int poll_cb ()	616	static int poll_cb (void)
329	{	617	{
330	dSP;
331	int count = 0;
332	int do_croak = 0;
333	aio_req req;
334
335	for (;;)	618	for (;;)
336	{	619	{
337	pthread_mutex_lock (&reslock);	620	int res = eio_poll ();
338	req = ress;
339		621
340	if (req)	622	if (res > 0)
341	{
342	ress = req->next;
343
344	if (!ress)
345	{
346	/* read any signals sent by the worker threads */
347	char buf [32];
348	while (read (respipe [0], buf, 32) == 32)
349	;
350
351	rese = 0;
352	}
353	}
354
355	pthread_mutex_unlock (&reslock);
356
357	if (!req)
358	break;	623	croak (0);
359		624
360	nreqs--;	625	if (!max_outstanding || max_outstanding > eio_nreqs ())
		626	return res;
361		627
362	if (req->type == REQ_QUIT)	628	poll_wait ();
363	started--;
364	else if (req->type == REQ_GROUP && req->length)
365	{
366	req->fd = 1; /* mark request as delayed */
367	continue;
368	}
369	else
370	{
371	if (req->type == REQ_READ)
372	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
373
374	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
375	SvREADONLY_off (req->data);
376
377	if (req->statdata)
378	{
379	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
380	PL_laststatval = req->result;
381	PL_statcache = *(req->statdata);
382	}
383
384	req_invoke (req);
385
386	count++;
387	}
388
389	req_free (req);
390	}	629	}
391
392	return count;
393	}	630	}
394		631
395	static void *aio_proc(void *arg);
396
397	static void start_thread (void)	632	static void atfork_child (void)
398	{	633	{
399	sigset_t fullsigset, oldsigset;	634	create_respipe ();
400	pthread_t tid;
401	pthread_attr_t attr;
402
403	pthread_attr_init (&attr);
404	pthread_attr_setstacksize (&attr, STACKSIZE);
405	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
406
407	sigfillset (&fullsigset);
408	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
409
410	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
411	started++;
412
413	sigprocmask (SIG_SETMASK, &oldsigset, 0);
414	}
415
416	static void req_send (aio_req req)
417	{
418	while (started < wanted && nreqs >= started)
419	start_thread ();
420
421	nreqs++;
422
423	pthread_mutex_lock (&reqlock);
424
425	req->next = 0;
426
427	if (reqe)
428	{
429	reqe->next = req;
430	reqe = req;
431	}
432	else
433	reqe = reqs = req;
434
435	pthread_cond_signal (&reqwait);
436	pthread_mutex_unlock (&reqlock);
437
438	if (nreqs > max_outstanding)
439	for (;;)
440	{
441	poll_cb ();
442
443	if (nreqs <= max_outstanding)
444	break;
445
446	poll_wait ();
447	}
448	}
449
450	static void end_thread (void)
451	{
452	aio_req req;
453	Newz (0, req, 1, aio_cb);
454	req->type = REQ_QUIT;
455
456	req_send (req);
457	}
458
459	static void min_parallel (int nthreads)
460	{
461	if (wanted < nthreads)
462	wanted = nthreads;
463	}
464
465	static void max_parallel (int nthreads)
466	{
467	int cur = started;
468
469	if (wanted > nthreads)
470	wanted = nthreads;
471
472	while (cur > wanted)
473	{
474	end_thread ();
475	cur--;
476	}
477
478	while (started > wanted)
479	{
480	poll_wait ();
481	poll_cb ();
482	}
483	}
484
485	static void create_pipe ()
486	{
487	if (pipe (respipe))
488	croak ("unable to initialize result pipe");
489
490	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
491	croak ("cannot set result pipe to nonblocking mode");
492
493	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
494	croak ("cannot set result pipe to nonblocking mode");
495	}	635	}
496		636
497	/*****************************************************************************/	637	/*****************************************************************************/
498	/* work around various missing functions */
499		638
500	#if !HAVE_PREADWRITE	639	#if !_POSIX_MAPPED_FILES
501	# define pread aio_pread	640	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
502	# define pwrite aio_pwrite	641	# define munmap(addr,length) (errno = ENOSYS, -1)
503
504	/*
505	* make our pread/pwrite safe against themselves, but not against
506	* normal read/write by using a mutex. slows down execution a lot,
507	* but that's your problem, not mine.
508	*/
509	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
510
511	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
512	{
513	ssize_t res;
514	off_t ooffset;
515
516	pthread_mutex_lock (&preadwritelock);
517	ooffset = lseek (fd, 0, SEEK_CUR);
518	lseek (fd, offset, SEEK_SET);
519	res = read (fd, buf, count);
520	lseek (fd, ooffset, SEEK_SET);
521	pthread_mutex_unlock (&preadwritelock);
522
523	return res;
524	}
525
526	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
527	{
528	ssize_t res;
529	off_t ooffset;
530
531	pthread_mutex_lock (&preadwritelock);
532	ooffset = lseek (fd, 0, SEEK_CUR);
533	lseek (fd, offset, SEEK_SET);
534	res = write (fd, buf, count);
535	lseek (fd, offset, SEEK_SET);
536	pthread_mutex_unlock (&preadwritelock);
537
538	return res;
539	}
540	#endif
541
542	#if !HAVE_FDATASYNC
543	# define fdatasync fsync
544	#endif
545
546	#if !HAVE_READAHEAD
547	# define readahead aio_readahead
548
549	static ssize_t readahead (int fd, off_t offset, size_t count)
550	{
551	char readahead_buf[4096];
552
553	while (count > 0)
554	{
555	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
556
557	pread (fd, readahead_buf, len, offset);
558	offset += len;
559	count -= len;
560	}
561
562	errno = 0;
563	}
564	#endif
565
566	#if !HAVE_READDIR_R
567	# define readdir_r aio_readdir_r
568
569	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
570
571	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
572	{
573	struct dirent *e;
574	int errorno;
575
576	pthread_mutex_lock (&readdirlock);
577
578	e = readdir (dirp);
579	errorno = errno;
580
581	if (e)
582	{
583	*res = ent;
584	strcpy (ent->d_name, e->d_name);
585	}
586	else
587	*res = 0;
588
589	pthread_mutex_unlock (&readdirlock);
590
591	errno = errorno;
592	return e ? 0 : -1;
593	}
594	#endif
595
596	/* sendfile always needs emulation */
597	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
598	{
599	ssize_t res;
600
601	if (!count)
602	return 0;
603
604	#if HAVE_SENDFILE
605	# if __linux
606	res = sendfile (ofd, ifd, &offset, count);
607
608	# elif __freebsd
609	/*
610	* Of course, the freebsd sendfile is a dire hack with no thoughts
611	* wasted on making it similar to other I/O functions.
612	*/
613	{
614	off_t sbytes;
615	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
616
617	if (res < 0 && sbytes)
618	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
619	res = sbytes;
620	}
621
622	# elif __hpux
623	res = sendfile (ofd, ifd, offset, count, 0, 0);
624
625	# elif __solaris
626	{
627	struct sendfilevec vec;
628	size_t sbytes;
629
630	vec.sfv_fd = ifd;
631	vec.sfv_flag = 0;
632	vec.sfv_off = offset;
633	vec.sfv_len = count;
634
635	res = sendfilev (ofd, &vec, 1, &sbytes);
636
637	if (res < 0 && sbytes)
638	res = sbytes;
639	}
640
641	# endif	642	#endif
642	#else
643	res = -1;
644	errno = ENOSYS;
645	#endif
646		643
647	if (res < 0	644	#if !_POSIX_MEMORY_PROTECTION
648	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	645	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
649	#if __solaris	646	# define PROT_NONE 0
650	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	647	# define PROT_WRITE 0
		648	# define MAP_PRIVATE 0
		649	# define MAP_SHARED 0
		650	# define MAP_FIXED 0
651	#endif	651	#endif
652	)
653	)
654	{
655	/* emulate sendfile. this is a major pain in the ass */
656	char buf[4096];
657	res = 0;
658		652
659	while (count)	653	#define MMAP_MAGIC PERL_MAGIC_ext
660	{
661	ssize_t cnt;
662
663	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
664		654
665	if (cnt <= 0)	655	static int
666	{	656	mmap_free (pTHX_ SV *sv, MAGIC *mg)
667	if (cnt && !res) res = -1;
668	break;
669	}
670
671	cnt = write (ofd, buf, cnt);
672
673	if (cnt <= 0)
674	{
675	if (cnt && !res) res = -1;
676	break;
677	}
678
679	offset += cnt;
680	res += cnt;
681	count -= cnt;
682	}
683	}
684
685	return res;
686	}
687
688	/* read a full directory */
689	static int scandir_ (const char *path, void **namesp)
690	{	657	{
691	DIR *dirp = opendir (path);	658	int old_errno = errno;
692	union	659	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
693	{
694	struct dirent d;
695	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
696	} u;
697	struct dirent *entp;
698	char *name, *names;
699	int memlen = 4096;
700	int memofs = 0;
701	int res = 0;
702	int errorno;
703
704	if (!dirp)
705	return -1;
706
707	names = malloc (memlen);
708
709	for (;;)
710	{
711	errno = 0, readdir_r (dirp, &u.d, &entp);
712
713	if (!entp)
714	break;
715
716	name = entp->d_name;
717
718	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
719	{
720	int len = strlen (name) + 1;
721
722	res++;
723
724	while (memofs + len > memlen)
725	{
726	memlen *= 2;
727	names = realloc (names, memlen);
728	if (!names)
729	break;
730	}
731
732	memcpy (names + memofs, name, len);
733	memofs += len;
734	}
735	}
736
737	errorno = errno;	660	errno = old_errno;
738	closedir (dirp);
739		661
740	if (errorno)	662	mg->mg_obj = 0; /* just in case */
741	{
742	free (names);
743	errno = errorno;
744	res = -1;
745	}
746		663
747	*namesp = (void *)names;	664	SvREADONLY_off (sv);
		665
		666	if (SvPVX (sv) != mg->mg_ptr)
		667	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		668
		669	SvCUR_set (sv, 0);
		670	SvPVX (sv) = 0;
		671	SvOK_off (sv);
		672
748	return res;	673	return 0;
749	}	674	}
		675
		676	static MGVTBL mmap_vtbl = {
		677	0, 0, 0, 0, mmap_free
		678	};
750		679
751	/*****************************************************************************/	680	/*****************************************************************************/
752		681
753	static void *aio_proc (void *thr_arg)	682	static SV *
		683	get_cb (SV *cb_sv)
754	{	684	{
755	aio_req req;	685	SvGETMAGIC (cb_sv);
756	int type;	686	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
757
758	do
759	{
760	pthread_mutex_lock (&reqlock);
761
762	for (;;)
763	{
764	req = reqs;
765
766	if (reqs)
767	{
768	reqs = reqs->next;
769	if (!reqs) reqe = 0;
770	}
771
772	if (req)
773	break;
774
775	pthread_cond_wait (&reqwait, &reqlock);
776	}
777
778	pthread_mutex_unlock (&reqlock);
779
780	errno = 0; /* strictly unnecessary */
781
782	if (!req->cancelled)
783	switch (req->type)
784	{
785	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
786	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
787
788	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
789	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
790
791	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
792	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
793	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
794
795	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
796	case REQ_CLOSE: req->result = close (req->fd); break;
797	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
798	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
799	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
800	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
801	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
802
803	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
804	case REQ_FSYNC: req->result = fsync (req->fd); break;
805	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
806
807	case REQ_SLEEP:
808	{
809	struct timeval tv;
810
811	tv.tv_sec = req->fd;
812	tv.tv_usec = req->fd2;
813
814	req->result = select (0, 0, 0, 0, &tv);
815	}
816
817	case REQ_QUIT:
818	break;
819
820	default:
821	req->result = ENOSYS;
822	break;
823	}
824
825	req->errorno = errno;
826
827	pthread_mutex_lock (&reslock);
828
829	req->next = 0;
830
831	if (rese)
832	{
833	rese->next = req;
834	rese = req;
835	}
836	else
837	{
838	rese = ress = req;
839
840	/* write a dummy byte to the pipe so fh becomes ready */
841	write (respipe [1], &respipe, 1);
842	}
843
844	pthread_mutex_unlock (&reslock);
845	}
846	while (type != REQ_QUIT);
847
848	return 0;
849	}
850
851	/*****************************************************************************/
852
853	static void atfork_prepare (void)
854	{
855	pthread_mutex_lock (&reqlock);
856	pthread_mutex_lock (&reslock);
857	#if !HAVE_PREADWRITE
858	pthread_mutex_lock (&preadwritelock);
859	#endif
860	#if !HAVE_READDIR_R
861	pthread_mutex_lock (&readdirlock);
862	#endif
863	}
864
865	static void atfork_parent (void)
866	{
867	#if !HAVE_READDIR_R
868	pthread_mutex_unlock (&readdirlock);
869	#endif
870	#if !HAVE_PREADWRITE
871	pthread_mutex_unlock (&preadwritelock);
872	#endif
873	pthread_mutex_unlock (&reslock);
874	pthread_mutex_unlock (&reqlock);
875	}
876
877	static void atfork_child (void)
878	{
879	aio_req prv;
880
881	started = 0;
882
883	while (reqs)
884	{
885	prv = reqs;
886	reqs = prv->next;
887	req_free (prv);
888	}
889
890	reqs = reqe = 0;
891
892	while (ress)
893	{
894	prv = ress;
895	ress = prv->next;
896	req_free (prv);
897	}
898
899	ress = rese = 0;
900
901	close (respipe [0]);
902	close (respipe [1]);
903	create_pipe ();
904
905	atfork_parent ();
906	}	687	}
907		688
908	#define dREQ \	689	#define dREQ \
		690	SV *cb_cv; \
909	aio_req req; \	691	aio_req req; \
		692	int req_pri = next_pri; \
		693	next_pri = EIO_PRI_DEFAULT; \
910	\	694	\
911	if (SvOK (callback) && !SvROK (callback)) \	695	cb_cv = get_cb (callback); \
912	croak ("callback must be undef or of reference type"); \
913	\	696	\
914	Newz (0, req, 1, aio_cb); \	697	Newz (0, req, 1, eio_req); \
915	if (!req) \	698	if (!req) \
916	croak ("out of memory during aio_req allocation"); \	699	croak ("out of memory during eio_req allocation"); \
917	\	700	\
918	req->callback = newSVsv (callback)	701	req->callback = SvREFCNT_inc (cb_cv); \
		702	req->pri = req_pri
919		703
920	#define REQ_SEND \	704	#define REQ_SEND \
		705	PUTBACK; \
921	req_send (req); \	706	req_submit (req); \
		707	SPAGAIN; \
922	\	708	\
923	if (GIMME_V != G_VOID) \	709	if (GIMME_V != G_VOID) \
924	XPUSHs (req_sv (req, AIO_REQ_KLASS));	710	XPUSHs (req_sv (req, aio_req_stash));
925		711
926	MODULE = IO::AIO PACKAGE = IO::AIO	712	MODULE = IO::AIO PACKAGE = IO::AIO
927		713
928	PROTOTYPES: ENABLE	714	PROTOTYPES: ENABLE
929		715
930	BOOT:	716	BOOT:
931	{	717	{
		718	static const struct {
		719	const char *name;
		720	IV iv;
		721	} *civ, const_iv[] = {
		722	# define const_niv(name, value) { # name, (IV) value },
		723	# define const_iv(name) { # name, (IV) name },
		724	# define const_eio(name) { # name, (IV) EIO_ ## name },
		725	const_iv (EXDEV)
		726	const_iv (ENOSYS)
		727	const_iv (O_RDONLY)
		728	const_iv (O_WRONLY)
		729	const_iv (O_RDWR)
		730	const_iv (O_CREAT)
		731	const_iv (O_TRUNC)
		732	const_iv (O_EXCL)
		733	const_iv (O_APPEND)
		734	#ifndef _WIN32
		735	const_iv (S_IFIFO)
		736	#endif
		737	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		738	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		739	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		740	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		741	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		742	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		743
		744	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		745	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		746	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		747	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		748	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		749
		750	const_iv (ST_RDONLY)
		751	const_iv (ST_NOSUID)
		752	const_iv (ST_NODEV)
		753	const_iv (ST_NOEXEC)
		754	const_iv (ST_SYNCHRONOUS)
		755	const_iv (ST_MANDLOCK)
		756	const_iv (ST_WRITE)
		757	const_iv (ST_APPEND)
		758	const_iv (ST_IMMUTABLE)
		759	const_iv (ST_NOATIME)
		760	const_iv (ST_NODIRATIME)
		761	const_iv (ST_RELATIME)
		762
		763	const_iv (PROT_NONE)
		764	const_iv (PROT_EXEC)
		765	const_iv (PROT_READ)
		766	const_iv (PROT_WRITE)
		767
		768	/*const_iv (MAP_FIXED)*/
		769	const_iv (MAP_PRIVATE)
		770	const_iv (MAP_SHARED)
		771	const_iv (MAP_ANONYMOUS)
		772
		773	/* linuxish */
		774	const_iv (MAP_HUGETLB)
		775	const_iv (MAP_LOCKED)
		776	const_iv (MAP_NORESERVE)
		777	const_iv (MAP_POPULATE)
		778	const_iv (MAP_NONBLOCK)
		779
		780	const_eio (MCL_FUTURE)
		781	const_eio (MCL_CURRENT)
		782
		783	const_eio (MS_ASYNC)
		784	const_eio (MS_INVALIDATE)
		785	const_eio (MS_SYNC)
		786
		787	const_eio (MT_MODIFY)
		788
		789	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		790	const_eio (SYNC_FILE_RANGE_WRITE)
		791	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		792
		793	const_eio (READDIR_DENTS)
		794	const_eio (READDIR_DIRS_FIRST)
		795	const_eio (READDIR_STAT_ORDER)
		796	const_eio (READDIR_FOUND_UNKNOWN)
		797
		798	const_eio (DT_UNKNOWN)
		799	const_eio (DT_FIFO)
		800	const_eio (DT_CHR)
		801	const_eio (DT_DIR)
		802	const_eio (DT_BLK)
		803	const_eio (DT_REG)
		804	const_eio (DT_LNK)
		805	const_eio (DT_SOCK)
		806	const_eio (DT_WHT)
		807	};
		808
932	HV *stash = gv_stashpv ("IO::AIO", 1);	809	aio_stash = gv_stashpv ("IO::AIO" , 1);
933	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	810	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
934	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	811	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
935	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
936		812
		813	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		814	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		815
		816	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		817
937	create_pipe ();	818	create_respipe ();
938	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
939	}
940		819
		820	if (eio_init (want_poll, done_poll) < 0)
		821	croak ("IO::AIO: unable to initialise eio library");
		822
		823	/* atfork child called in fifo order, so before eio's handler */
		824	X_THREAD_ATFORK (0, 0, atfork_child);
		825	}
		826
941	void	827	void
942	min_parallel (nthreads)	828	max_poll_reqs (int nreqs)
943	int nthreads
944	PROTOTYPE: $	829	PROTOTYPE: $
		830	CODE:
		831	eio_set_max_poll_reqs (nreqs);
945		832
946	void	833	void
947	max_parallel (nthreads)	834	max_poll_time (double nseconds)
948	int nthreads
949	PROTOTYPE: $	835	PROTOTYPE: $
950
951	int
952	max_outstanding (nreqs)
953	int nreqs
954	PROTOTYPE: $
955	CODE:	836	CODE:
956	RETVAL = max_outstanding;	837	eio_set_max_poll_time (nseconds);
		838
		839	void
		840	min_parallel (int nthreads)
		841	PROTOTYPE: $
		842	CODE:
		843	eio_set_min_parallel (nthreads);
		844
		845	void
		846	max_parallel (int nthreads)
		847	PROTOTYPE: $
		848	CODE:
		849	eio_set_max_parallel (nthreads);
		850
		851	void
		852	max_idle (int nthreads)
		853	PROTOTYPE: $
		854	CODE:
		855	eio_set_max_idle (nthreads);
		856
		857	void
		858	max_outstanding (int maxreqs)
		859	PROTOTYPE: $
		860	CODE:
957	max_outstanding = nreqs;	861	max_outstanding = maxreqs;
958		862
959	void	863	void
960	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	864	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
961	SV * pathname
962	int flags
963	int mode
964	SV * callback
965	PROTOTYPE: $$$;$
966	PPCODE:	865	PPCODE:
967	{	866	{
968	dREQ;	867	dREQ;
969		868
970	req->type = REQ_OPEN;	869	req->type = EIO_OPEN;
971	req->data = newSVsv (pathname);	870	req->sv1 = newSVsv (pathname);
972	req->dataptr = SvPVbyte_nolen (req->data);	871	req->ptr1 = SvPVbyte_nolen (req->sv1);
973	req->fd = flags;	872	req->int1 = flags;
974	req->mode = mode;	873	req->int2 = mode;
975		874
976	REQ_SEND;	875	REQ_SEND;
977	}	876	}
978		877
979	void	878	void
980	aio_close (fh,callback=&PL_sv_undef)	879	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
981	SV * fh
982	SV * callback
983	PROTOTYPE: $;$
984	ALIAS:	880	ALIAS:
985	aio_close = REQ_CLOSE
986	aio_fsync = REQ_FSYNC	881	aio_fsync = EIO_FSYNC
987	aio_fdatasync = REQ_FDATASYNC	882	aio_fdatasync = EIO_FDATASYNC
988	PPCODE:	883	PPCODE:
989	{	884	{
		885	int fd = s_fileno_croak (fh, 0);
990	dREQ;	886	dREQ;
991		887
992	req->type = ix;	888	req->type = ix;
993	req->fh = newSVsv (fh);	889	req->sv1 = newSVsv (fh);
994	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	890	req->int1 = fd;
995		891
996	REQ_SEND (req);	892	REQ_SEND (req);
997	}	893	}
998		894
999	void	895	void
		896	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		897	PPCODE:
		898	{
		899	int fd = s_fileno_croak (fh, 0);
		900	dREQ;
		901
		902	req->type = EIO_SYNC_FILE_RANGE;
		903	req->sv1 = newSVsv (fh);
		904	req->int1 = fd;
		905	req->offs = offset;
		906	req->size = nbytes;
		907	req->int2 = flags;
		908
		909	REQ_SEND (req);
		910	}
		911
		912	void
		913	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		914	PPCODE:
		915	{
		916	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		917	int fd = s_fileno_croak (fh, 0);
		918	dREQ;
		919
		920	if (close_pipe < 0)
		921	{
		922	int pipefd [2];
		923
		924	if (pipe (pipefd) < 0
		925	|| close (pipefd [1]) < 0
		926	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		927	abort (); /*D*/
		928
		929	close_pipe = pipefd [0];
		930	}
		931
		932	req->type = EIO_DUP2;
		933	req->int1 = close_pipe;
		934	req->sv2 = newSVsv (fh);
		935	req->int2 = fd;
		936
		937	REQ_SEND (req);
		938	}
		939
		940	void
1000	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	941	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1001	SV * fh
1002	UV offset
1003	UV length
1004	SV * data
1005	UV dataoffset
1006	SV * callback
1007	ALIAS:	942	ALIAS:
1008	aio_read = REQ_READ	943	aio_read = EIO_READ
1009	aio_write = REQ_WRITE	944	aio_write = EIO_WRITE
1010	PROTOTYPE: $$$$$;$
1011	PPCODE:	945	PPCODE:
1012	{	946	{
1013	aio_req req;
1014	STRLEN svlen;	947	STRLEN svlen;
		948	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1015	char *svptr = SvPVbyte (data, svlen);	949	char *svptr = SvPVbyte (data, svlen);
1016		950	UV len = SvUV (length);
1017	SvUPGRADE (data, SVt_PV);
1018	SvPOK_on (data);
1019		951
1020	if (dataoffset < 0)	952	if (dataoffset < 0)
1021	dataoffset += svlen;	953	dataoffset += svlen;
1022		954
1023	if (dataoffset < 0 || dataoffset > svlen)	955	if (dataoffset < 0 || dataoffset > svlen)
1024	croak ("data offset outside of string");	956	croak ("dataoffset outside of data scalar");
1025		957
1026	if (ix == REQ_WRITE)	958	if (ix == EIO_WRITE)
1027	{	959	{
1028	/* write: check length and adjust. */	960	/* write: check length and adjust. */
1029	if (length < 0 || length + dataoffset > svlen)	961	if (!SvOK (length) || len + dataoffset > svlen)
1030	length = svlen - dataoffset;	962	len = svlen - dataoffset;
1031	}	963	}
1032	else	964	else
1033	{	965	{
1034	/* read: grow scalar as necessary */	966	/* read: check type and grow scalar as necessary */
		967	SvUPGRADE (data, SVt_PV);
1035	svptr = SvGROW (data, length + dataoffset);	968	svptr = SvGROW (data, len + dataoffset + 1);
1036	}	969	}
1037
1038	if (length < 0)
1039	croak ("length must not be negative");
1040		970
1041	{	971	{
1042	dREQ;	972	dREQ;
1043		973
1044	req->type = ix;	974	req->type = ix;
1045	req->fh = newSVsv (fh);	975	req->sv1 = newSVsv (fh);
1046	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	976	req->int1 = fd;
1047	: IoOFP (sv_2io (fh)));	977	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1048	req->offset = offset;	978	req->size = len;
1049	req->length = length;
1050	req->data = SvREFCNT_inc (data);	979	req->sv2 = SvREFCNT_inc (data);
1051	req->dataptr = (char *)svptr + dataoffset;	980	req->ptr2 = (char *)svptr + dataoffset;
		981	req->stroffset = dataoffset;
1052		982
1053	if (!SvREADONLY (data))	983	if (!SvREADONLY (data))
1054	{	984	{
1055	SvREADONLY_on (data);	985	SvREADONLY_on (data);
1056	req->data2ptr = (void *)data;	986	req->flags |= FLAG_SV2_RO_OFF;
1057	}	987	}
1058		988
1059	REQ_SEND;	989	REQ_SEND;
1060	}	990	}
1061	}	991	}
1062		992
1063	void	993	void
1064	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	994	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1065	SV * out_fh
1066	SV * in_fh
1067	UV in_offset
1068	UV length
1069	SV * callback
1070	PROTOTYPE: $$$$;$
1071	PPCODE:	995	PPCODE:
1072	{	996	{
		997	SV *data;
		998	dREQ;
		999
		1000	req->type = EIO_READLINK;
		1001	req->sv1 = newSVsv (path);
		1002	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1003
		1004	REQ_SEND;
		1005	}
		1006
		1007	void
		1008	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1009	PPCODE:
		1010	{
		1011	int ifd = s_fileno_croak (in_fh , 0);
		1012	int ofd = s_fileno_croak (out_fh, 1);
1073	dREQ;	1013	dREQ;
1074		1014
1075	req->type = REQ_SENDFILE;	1015	req->type = EIO_SENDFILE;
1076	req->fh = newSVsv (out_fh);	1016	req->sv1 = newSVsv (out_fh);
1077	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1017	req->int1 = ofd;
1078	req->fh2 = newSVsv (in_fh);	1018	req->sv2 = newSVsv (in_fh);
1079	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1019	req->int2 = ifd;
1080	req->offset = in_offset;	1020	req->offs = in_offset;
1081	req->length = length;	1021	req->size = length;
1082		1022
1083	REQ_SEND;	1023	REQ_SEND;
1084	}	1024	}
1085		1025
1086	void	1026	void
1087	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1027	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1088	SV * fh
1089	UV offset
1090	IV length
1091	SV * callback
1092	PROTOTYPE: $$$;$
1093	PPCODE:	1028	PPCODE:
1094	{	1029	{
		1030	int fd = s_fileno_croak (fh, 0);
1095	dREQ;	1031	dREQ;
1096		1032
1097	req->type = REQ_READAHEAD;	1033	req->type = EIO_READAHEAD;
1098	req->fh = newSVsv (fh);	1034	req->sv1 = newSVsv (fh);
1099	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1035	req->int1 = fd;
1100	req->offset = offset;	1036	req->offs = offset;
1101	req->length = length;	1037	req->size = length;
1102		1038
1103	REQ_SEND;	1039	REQ_SEND;
1104	}	1040	}
1105		1041
1106	void	1042	void
1107	aio_stat (fh_or_path,callback=&PL_sv_undef)	1043	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1108	SV * fh_or_path
1109	SV * callback
1110	ALIAS:	1044	ALIAS:
1111	aio_stat = REQ_STAT	1045	aio_stat = EIO_STAT
1112	aio_lstat = REQ_LSTAT	1046	aio_lstat = EIO_LSTAT
		1047	aio_statvfs = EIO_STATVFS
1113	PPCODE:	1048	PPCODE:
1114	{	1049	{
1115	dREQ;	1050	dREQ;
1116		1051
1117	New (0, req->statdata, 1, Stat_t);	1052	req->sv1 = newSVsv (fh_or_path);
1118	if (!req->statdata)
1119	{
1120	req_free (req);
1121	croak ("out of memory during aio_req->statdata allocation");
1122	}
1123		1053
1124	if (SvPOK (fh_or_path))	1054	if (SvPOK (req->sv1))
1125	{	1055	{
1126	req->type = ix;	1056	req->type = ix;
1127	req->data = newSVsv (fh_or_path);
1128	req->dataptr = SvPVbyte_nolen (req->data);	1057	req->ptr1 = SvPVbyte_nolen (req->sv1);
1129	}	1058	}
1130	else	1059	else
1131	{	1060	{
1132	req->type = REQ_FSTAT;	1061	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1133	req->fh = newSVsv (fh_or_path);
1134	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1062	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1135	}	1063	}
1136		1064
1137	REQ_SEND;	1065	REQ_SEND;
1138	}	1066	}
1139		1067
1140	void	1068	void
		1069	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1070	PPCODE:
		1071	{
		1072	dREQ;
		1073
		1074	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1075	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1076	req->sv1 = newSVsv (fh_or_path);
		1077
		1078	if (SvPOK (req->sv1))
		1079	{
		1080	req->type = EIO_UTIME;
		1081	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1082	}
		1083	else
		1084	{
		1085	req->type = EIO_FUTIME;
		1086	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1087	}
		1088
		1089	REQ_SEND;
		1090	}
		1091
		1092	void
		1093	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1094	PPCODE:
		1095	{
		1096	dREQ;
		1097
		1098	req->sv1 = newSVsv (fh_or_path);
		1099	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1100
		1101	if (SvPOK (req->sv1))
		1102	{
		1103	req->type = EIO_TRUNCATE;
		1104	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1105	}
		1106	else
		1107	{
		1108	req->type = EIO_FTRUNCATE;
		1109	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1110	}
		1111
		1112	REQ_SEND;
		1113	}
		1114
		1115	void
		1116	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1117	ALIAS:
		1118	aio_chmod = EIO_CHMOD
		1119	aio_mkdir = EIO_MKDIR
		1120	PPCODE:
		1121	{
		1122	dREQ;
		1123
		1124	req->int2 = mode;
		1125	req->sv1 = newSVsv (fh_or_path);
		1126
		1127	if (SvPOK (req->sv1))
		1128	{
		1129	req->type = ix;
		1130	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1131	}
		1132	else
		1133	{
		1134	req->type = EIO_FCHMOD;
		1135	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1136	}
		1137
		1138	REQ_SEND;
		1139	}
		1140
		1141	void
		1142	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1143	PPCODE:
		1144	{
		1145	dREQ;
		1146
		1147	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1148	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1149	req->sv1 = newSVsv (fh_or_path);
		1150
		1151	if (SvPOK (req->sv1))
		1152	{
		1153	req->type = EIO_CHOWN;
		1154	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1155	}
		1156	else
		1157	{
		1158	req->type = EIO_FCHOWN;
		1159	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1160	}
		1161
		1162	REQ_SEND;
		1163	}
		1164
		1165	void
		1166	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1167	PPCODE:
		1168	{
		1169	dREQ;
		1170
		1171	req->type = EIO_READDIR;
		1172	req->sv1 = newSVsv (pathname);
		1173	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1174	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1175
		1176	if (flags & EIO_READDIR_DENTS)
		1177	req->int1 |= EIO_READDIR_CUSTOM2;
		1178
		1179	REQ_SEND;
		1180	}
		1181
		1182	void
1141	aio_unlink (pathname,callback=&PL_sv_undef)	1183	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1142	SV * pathname
1143	SV * callback
1144	ALIAS:	1184	ALIAS:
1145	aio_unlink = REQ_UNLINK	1185	aio_unlink = EIO_UNLINK
1146	aio_rmdir = REQ_RMDIR	1186	aio_rmdir = EIO_RMDIR
1147	aio_readdir = REQ_READDIR	1187	aio_readdir = EIO_READDIR
1148	PPCODE:	1188	PPCODE:
1149	{	1189	{
1150	dREQ;	1190	dREQ;
1151		1191
1152	req->type = ix;	1192	req->type = ix;
1153	req->data = newSVsv (pathname);	1193	req->sv1 = newSVsv (pathname);
1154	req->dataptr = SvPVbyte_nolen (req->data);	1194	req->ptr1 = SvPVbyte_nolen (req->sv1);
1155		1195
1156	REQ_SEND;	1196	REQ_SEND;
1157	}	1197	}
1158		1198
1159	void	1199	void
1160	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1200	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1161	SV * oldpath
1162	SV * newpath
1163	SV * callback
1164	ALIAS:	1201	ALIAS:
1165	aio_link = REQ_LINK	1202	aio_link = EIO_LINK
1166	aio_symlink = REQ_SYMLINK	1203	aio_symlink = EIO_SYMLINK
1167	aio_rename = REQ_RENAME	1204	aio_rename = EIO_RENAME
1168	PPCODE:	1205	PPCODE:
1169	{	1206	{
1170	dREQ;	1207	dREQ;
1171		1208
1172	req->type = ix;	1209	req->type = ix;
1173	req->fh = newSVsv (oldpath);	1210	req->sv1 = newSVsv (oldpath);
1174	req->data2ptr = SvPVbyte_nolen (req->fh);	1211	req->ptr1 = SvPVbyte_nolen (req->sv1);
1175	req->data = newSVsv (newpath);	1212	req->sv2 = newSVsv (newpath);
1176	req->dataptr = SvPVbyte_nolen (req->data);	1213	req->ptr2 = SvPVbyte_nolen (req->sv2);
1177		1214
1178	REQ_SEND;	1215	REQ_SEND;
1179	}	1216	}
1180		1217
1181	void	1218	void
1182	aio_sleep (delay,callback=&PL_sv_undef)	1219	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1183	double delay
1184	SV * callback
1185	PPCODE:	1220	PPCODE:
1186	{	1221	{
1187	dREQ;	1222	dREQ;
1188		1223
1189	req->type = REQ_SLEEP;	1224	req->type = EIO_MKNOD;
1190	req->fd = delay < 0. ? 0 : delay;	1225	req->sv1 = newSVsv (pathname);
1191	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1226	req->ptr1 = SvPVbyte_nolen (req->sv1);
1192		1227	req->int2 = (mode_t)mode;
		1228	req->offs = dev;
		1229
1193	REQ_SEND;	1230	REQ_SEND;
1194	}	1231	}
1195		1232
1196	void	1233	void
1197	aio_group (callback=&PL_sv_undef)	1234	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1198	SV * callback	1235	ALIAS:
1199	PROTOTYPE: ;$	1236	aio_mtouch = EIO_MTOUCH
		1237	aio_msync = EIO_MSYNC
1200	PPCODE:	1238	PPCODE:
1201	{	1239	{
		1240	STRLEN svlen;
		1241	char *svptr = SvPVbyte (data, svlen);
		1242	UV len = SvUV (length);
		1243
		1244	if (offset < 0)
		1245	offset += svlen;
		1246
		1247	if (offset < 0 || offset > svlen)
		1248	croak ("offset outside of scalar");
		1249
		1250	if (!SvOK (length) || len + offset > svlen)
		1251	len = svlen - offset;
		1252
		1253	{
		1254	dREQ;
		1255
		1256	req->type = ix;
		1257	req->sv2 = SvREFCNT_inc (data);
		1258	req->ptr2 = (char *)svptr + offset;
		1259	req->size = len;
		1260	req->int1 = flags;
		1261
		1262	REQ_SEND;
		1263	}
		1264	}
		1265
		1266	void
		1267	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1268	PPCODE:
		1269	{
		1270	STRLEN svlen;
		1271	char *svptr = SvPVbyte (data, svlen);
		1272	UV len = SvUV (length);
		1273
		1274	if (offset < 0)
		1275	offset += svlen;
		1276
		1277	if (offset < 0 || offset > svlen)
		1278	croak ("offset outside of scalar");
		1279
		1280	if (!SvOK (length) || len + offset > svlen)
		1281	len = svlen - offset;
		1282
		1283	{
		1284	dREQ;
		1285
		1286	req->type = EIO_MLOCK;
		1287	req->sv2 = SvREFCNT_inc (data);
		1288	req->ptr2 = (char *)svptr + offset;
		1289	req->size = len;
		1290
		1291	REQ_SEND;
		1292	}
		1293	}
		1294
		1295	void
		1296	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1297	PPCODE:
		1298	{
		1299	dREQ;
		1300
		1301	req->type = EIO_MLOCKALL;
		1302	req->int1 = flags;
		1303
		1304	REQ_SEND;
		1305	}
		1306
		1307	void
		1308	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1309	PPCODE:
		1310	{
1202	dREQ;	1311	dREQ;
		1312
		1313	req->type = EIO_BUSY;
		1314	req->nv1 = delay < 0. ? 0. : delay;
		1315
		1316	REQ_SEND;
		1317	}
		1318
		1319	void
		1320	aio_group (SV *callback=&PL_sv_undef)
		1321	PPCODE:
		1322	{
		1323	dREQ;
		1324
1203	req->type = REQ_GROUP;	1325	req->type = EIO_GROUP;
		1326
1204	req_send (req);	1327	req_submit (req);
1205	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1328	XPUSHs (req_sv (req, aio_grp_stash));
1206	}	1329	}
		1330
		1331	void
		1332	aio_nop (SV *callback=&PL_sv_undef)
		1333	ALIAS:
		1334	aio_nop = EIO_NOP
		1335	aio_sync = EIO_SYNC
		1336	PPCODE:
		1337	{
		1338	dREQ;
		1339
		1340	req->type = ix;
		1341
		1342	REQ_SEND;
		1343	}
		1344
		1345	int
		1346	aioreq_pri (int pri = 0)
		1347	CODE:
		1348	RETVAL = next_pri;
		1349	if (items > 0)
		1350	{
		1351	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1352	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1353	next_pri = pri;
		1354	}
		1355	OUTPUT:
		1356	RETVAL
		1357
		1358	void
		1359	aioreq_nice (int nice = 0)
		1360	CODE:
		1361	nice = next_pri - nice;
		1362	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1363	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1364	next_pri = nice;
1207		1365
1208	void	1366	void
1209	flush ()	1367	flush ()
1210	PROTOTYPE:
1211	CODE:	1368	CODE:
1212	while (nreqs)	1369	while (eio_nreqs ())
1213	{	1370	{
1214	poll_wait ();	1371	poll_wait ();
1215	poll_cb ();	1372	poll_cb ();
1216	}	1373	}
1217		1374
1218	void	1375	int
1219	poll()	1376	poll ()
1220	PROTOTYPE:
1221	CODE:	1377	CODE:
1222	if (nreqs)
1223	{
1224	poll_wait ();	1378	poll_wait ();
1225	poll_cb ();	1379	RETVAL = poll_cb ();
1226	}
1227
1228	int
1229	poll_fileno()
1230	PROTOTYPE:
1231	CODE:
1232	RETVAL = respipe [0];
1233	OUTPUT:	1380	OUTPUT:
1234	RETVAL	1381	RETVAL
1235		1382
1236	int	1383	int
		1384	poll_fileno ()
		1385	CODE:
		1386	RETVAL = s_epipe_fd (&respipe);
		1387	OUTPUT:
		1388	RETVAL
		1389
		1390	int
1237	poll_cb(...)	1391	poll_cb (...)
1238	PROTOTYPE:	1392	PROTOTYPE:
1239	CODE:	1393	CODE:
1240	RETVAL = poll_cb ();	1394	RETVAL = poll_cb ();
1241	OUTPUT:	1395	OUTPUT:
1242	RETVAL	1396	RETVAL
1243		1397
1244	void	1398	void
1245	poll_wait()	1399	poll_wait ()
1246	PROTOTYPE:
1247	CODE:	1400	CODE:
1248	if (nreqs)
1249	poll_wait ();	1401	poll_wait ();
1250		1402
1251	int	1403	int
1252	nreqs()	1404	nreqs ()
1253	PROTOTYPE:
1254	CODE:	1405	CODE:
1255	RETVAL = nreqs;	1406	RETVAL = eio_nreqs ();
1256	OUTPUT:	1407	OUTPUT:
1257	RETVAL	1408	RETVAL
1258		1409
		1410	int
		1411	nready ()
		1412	CODE:
		1413	RETVAL = eio_nready ();
		1414	OUTPUT:
		1415	RETVAL
		1416
		1417	int
		1418	npending ()
		1419	CODE:
		1420	RETVAL = eio_npending ();
		1421	OUTPUT:
		1422	RETVAL
		1423
		1424	int
		1425	nthreads ()
		1426	CODE:
		1427	RETVAL = eio_nthreads ();
		1428	OUTPUT:
		1429	RETVAL
		1430
		1431	int
		1432	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1433	CODE:
		1434	RETVAL = posix_fadvise (fh, offset, length, advice);
		1435	OUTPUT:
		1436	RETVAL
		1437
		1438	ssize_t
		1439	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1440	CODE:
		1441	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1442	OUTPUT:
		1443	RETVAL
		1444
		1445	void
		1446	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1447	PPCODE:
		1448	sv_unmagic (scalar, MMAP_MAGIC);
		1449	{
		1450	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1451	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1452	if (addr == (void *)-1)
		1453	XSRETURN_NO;
		1454
		1455	sv_force_normal (scalar);
		1456
		1457	/* we store the length in mg_obj, as namlen is I32 :/ */
		1458	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1459	->mg_obj = (SV *)length;
		1460
		1461	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1462
		1463	if (!(prot & PROT_WRITE))
		1464	SvREADONLY_on (scalar);
		1465
		1466	if (SvLEN (scalar))
		1467	Safefree (SvPVX (scalar));
		1468
		1469	SvPVX (scalar) = (char *)addr;
		1470	SvCUR_set (scalar, length);
		1471	SvLEN_set (scalar, 0);
		1472	SvPOK_only (scalar);
		1473
		1474	XSRETURN_YES;
		1475	}
		1476
		1477	void
		1478	munmap (SV *scalar)
		1479	CODE:
		1480	sv_unmagic (scalar, MMAP_MAGIC);
		1481
		1482	int
		1483	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1484	ALIAS:
		1485	mprotect = 1
		1486	CODE:
		1487	{
		1488	STRLEN svlen;
		1489	void *addr = SvPVbyte (scalar, svlen);
		1490	size_t len = SvUV (length);
		1491
		1492	if (offset < 0)
		1493	offset += svlen;
		1494
		1495	if (offset < 0 || offset > svlen)
		1496	croak ("offset outside of scalar");
		1497
		1498	if (!SvOK (length) || len + offset > svlen)
		1499	len = svlen - offset;
		1500
		1501	addr = (void *)(((intptr_t)addr) + offset);
		1502	eio_page_align (&addr, &len);
		1503
		1504	switch (ix)
		1505	{
		1506	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1507	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1508	}
		1509	}
		1510	OUTPUT:
		1511	RETVAL
		1512
		1513	int
		1514	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1515	CODE:
		1516	{
		1517	STRLEN svlen;
		1518	void *addr = SvPVbyte (scalar, svlen);
		1519	size_t len = SvUV (length);
		1520
		1521	if (offset < 0)
		1522	offset += svlen;
		1523
		1524	if (offset < 0 || offset > svlen)
		1525	croak ("offset outside of scalar");
		1526
		1527	if (!SvOK (length) || len + offset > svlen)
		1528	len = svlen - offset;
		1529
		1530	addr = (void *)(((intptr_t)addr) + offset);
		1531	eio_page_align (&addr, &len);
		1532	#if _POSIX_MEMLOCK_RANGE
		1533	RETVAL = munlock (addr, len);
		1534	#else
		1535	RETVAL = ((errno = ENOSYS), -1);
		1536	#endif
		1537	}
		1538	OUTPUT:
		1539	RETVAL
		1540
		1541	int
		1542	munlockall ()
		1543	CODE:
		1544	#if _POSIX_MEMLOCK
		1545	munlockall ();
		1546	#else
		1547	RETVAL = -1;
		1548	errno = ENOSYS;
		1549	#endif
		1550	OUTPUT:
		1551	RETVAL
		1552
		1553	void _on_next_submit (SV *cb)
		1554	CODE:
		1555	SvREFCNT_dec (on_next_submit);
		1556	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1557
1259	PROTOTYPES: DISABLE	1558	PROTOTYPES: DISABLE
1260		1559
1261	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1560	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1262		1561
1263	void	1562	void
1264	cancel (aio_req_ornot req)	1563	cancel (aio_req_ornot req)
1265	PROTOTYPE:
1266	CODE:	1564	CODE:
1267	req_cancel (req);	1565	eio_cancel (req);
		1566
		1567	void
		1568	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1569	PPCODE:
		1570	{
		1571	if (GIMME_V != G_VOID)
		1572	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1573
		1574	if (items > 1)
		1575	{
		1576	SV *cb_cv =get_cb (callback);
		1577
		1578	SvREFCNT_dec (req->callback);
		1579	req->callback = SvREFCNT_inc (cb_cv);
		1580	}
		1581	}
1268		1582
1269	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1583	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1270		1584
1271	void	1585	void
1272	add (aio_req grp, ...)	1586	add (aio_req grp, ...)
1273	PPCODE:	1587	PPCODE:
1274	{	1588	{
1275	int i;	1589	int i;
1276		1590
1277	if (grp->fd == 2)	1591	if (grp->int1 == 2)
1278	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1592	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1279		1593
1280	for (i = 1; i < items; ++i )	1594	for (i = 1; i < items; ++i )
1281	{	1595	{
		1596	aio_req req;
		1597
1282	if (GIMME_V != G_VOID)	1598	if (GIMME_V != G_VOID)
1283	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1599	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1284		1600
1285	aio_req req = SvAIO_REQ (ST (i));	1601	req = SvAIO_REQ (ST (i));
1286		1602
1287	if (req)	1603	if (req)
1288	{	1604	eio_grp_add (grp, req);
1289	++grp->length;
1290	req->grp = grp;
1291
1292	req->grp_prev = 0;
1293	req->grp_next = grp->grp_first;
1294
1295	if (grp->grp_first)
1296	grp->grp_first->grp_prev = req;
1297
1298	grp->grp_first = req;
1299	}
1300	}	1605	}
1301	}	1606	}
1302		1607
1303	void	1608	void
		1609	cancel_subs (aio_req_ornot req)
		1610	CODE:
		1611	req_cancel_subs (req);
		1612
		1613	void
1304	result (aio_req grp, ...)	1614	result (aio_req grp, ...)
		1615	CODE:
		1616	{
		1617	int i;
		1618	AV *av;
		1619
		1620	grp->errorno = errno;
		1621
		1622	av = newAV ();
		1623	av_extend (av, items - 1);
		1624
		1625	for (i = 1; i < items; ++i )
		1626	av_push (av, newSVsv (ST (i)));
		1627
		1628	SvREFCNT_dec (grp->sv1);
		1629	grp->sv1 = (SV *)av;
		1630	}
		1631
		1632	void
		1633	errno (aio_req grp, int errorno = errno)
		1634	CODE:
		1635	grp->errorno = errorno;
		1636
		1637	void
		1638	limit (aio_req grp, int limit)
1305	CODE:	1639	CODE:
1306	{	1640	eio_grp_limit (grp, limit);
1307	int i;
1308	AV *av = newAV ();
1309		1641
1310	for (i = 1; i < items; ++i )
1311	av_push (av, newSVsv (ST (i)));
1312
1313	SvREFCNT_dec (grp->data);
1314	grp->data = (SV *)av;
1315	}
1316
1317	void	1642	void
1318	feeder_limit (aio_req grp, int limit)	1643	feed (aio_req grp, SV *callback=&PL_sv_undef)
1319	CODE:	1644	CODE:
1320	grp->fd2 = limit;
1321	aio_grp_feed (grp);
1322
1323	void
1324	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
1325	CODE:
1326	{	1645	{
1327	SvREFCNT_dec (grp->fh2);	1646	SvREFCNT_dec (grp->sv2);
1328	grp->fh2 = newSVsv (callback);	1647	grp->sv2 = newSVsv (callback);
		1648	grp->feed = aio_grp_feed;
1329		1649
1330	if (grp->fd2 <= 0)	1650	if (grp->int2 <= 0)
1331	grp->fd2 = 2;	1651	grp->int2 = 2;
1332		1652
1333	aio_grp_feed (grp);	1653	eio_grp_limit (grp, grp->int2);
1334	}	1654	}
1335		1655

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