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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs.
Revision 1.170 by root, Wed Aug 4 16:09:36 2010 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/types.h>	14	#include <sys/types.h>
15	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
16	#include <limits.h>	17	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	18	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	19	#include <sched.h>
21		20
22	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
23	# if __linux
24	# include <sys/sendfile.h>	22	# include <sys/mman.h>
25	# elif __freebsd	23	#endif
26	# 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
27	# include <sys/uio.h>	68	# include <sys/time.h>
28	# elif __hpux
29	# include <sys/socket.h>
30	# elif __solaris /* not yet */
31	# 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/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		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 _XOPEN_SOURCE < 600 || NO_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	# define NO_MADVISE 1
		152	#endif
		153	#ifndef POSIX_MADV_SEQUENTIAL
		154	# define POSIX_MADV_SEQUENTIAL 0
		155	#endif
		156	#ifndef POSIX_MADV_RANDOM
		157	# define POSIX_MADV_RANDOM 0
		158	#endif
		159	#ifndef POSIX_MADV_WILLNEED
		160	# define POSIX_MADV_WILLNEED 0
		161	#endif
		162	#ifndef POSIX_MADV_DONTNEED
		163	# define POSIX_MADV_DONTNEED 0
		164	#endif
		165
		166	#if _XOPEN_SOURCE < 600 || NO_MADVISE
		167	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		168	#endif
		169
		170	#ifndef ST_NODEV
		171	# define ST_NODEV 0
		172	#endif
		173	#ifndef ST_NOEXEC
		174	# define ST_NOEXEC 0
		175	#endif
		176	#ifndef ST_SYNCHRONOUS
		177	# define ST_SYNCHRONOUS 0
		178	#endif
		179	#ifndef ST_MANDLOCK
		180	# define ST_MANDLOCK 0
		181	#endif
		182	#ifndef ST_WRITE
		183	# define ST_WRITE 0
		184	#endif
		185	#ifndef ST_APPEND
		186	# define ST_APPEND 0
		187	#endif
		188	#ifndef ST_IMMUTABLE
		189	# define ST_IMMUTABLE 0
		190	#endif
		191	#ifndef ST_NOATIME
		192	# define ST_NOATIME 0
		193	#endif
		194	#ifndef ST_NODIRATIME
		195	# define ST_NODIRATIME 0
		196	#endif
		197	#ifndef ST_RELATIME
		198	# define ST_RELATIME 0
		199	#endif
		200
		201	#ifndef MCL_CURRENT
		202	# define MCL_CURRENT 0
		203	#endif
		204	#ifndef MCL_FUTURE
		205	# define MCL_FUTURE 0
		206	#endif
		207
		208	#ifndef MAP_ANONYMOUS
		209	# ifdef MAP_ANON
		210	# define MAP_ANONYMOUS MAP_ANON
32	# else	211	# else
33	# error sendfile support requested but not available	212	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
34	# endif	213	# endif
35	#endif	214	#endif
36		215	#ifndef MAP_HUGETLB
37	/* used for struct dirent, AIX doesn't provide it */	216	# define MAP_HUGETLB 0
38	#ifndef NAME_MAX
39	# define NAME_MAX 4096
40	#endif	217	#endif
41		218	#ifndef MAP_LOCKED
42	#if __ia64	219	# define MAP_LOCKED 0
43	# define STACKSIZE 65536
44	#else
45	# define STACKSIZE 8192
46	#endif	220	#endif
		221	#ifndef MAP_NORESERVE
		222	# define MAP_NORESERVE 0
		223	#endif
		224	#ifndef MAP_POPULATE
		225	# define MAP_POPULATE 0
		226	#endif
		227	#ifndef MAP_NONBLOCK
		228	# define MAP_NONBLOCK 0
		229	#endif
		230
		231	#ifndef PAGESIZE
		232	# define PAGESIZE sysconf (_SC_PAGESIZE)
		233	#endif
		234
		235	static int req_invoke (eio_req *req);
		236	#define EIO_FINISH(req) req_invoke (req)
		237	static void req_destroy (eio_req *grp);
		238	#define EIO_DESTROY(req) req_destroy (req)
47		239
48	enum {	240	enum {
49	REQ_QUIT,	241	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
50	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,
52	REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,
58	};	242	};
59		243
60	#define AIO_CB_KLASS "IO::AIO::CB"	244	#include "libeio/eio.c"
61		245
62	typedef struct aio_cb
63	{
64	struct aio_cb *grp_prev, *grp_next;
65	struct aio_grp *grp;
66
67	struct aio_cb *volatile next;
68
69	SV *self; /* the perl counterpart of this request, if any */
70
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	Stat_t *statdata;
75	off_t offset;
76	size_t length;
77	ssize_t result;
78
79	int type;
80	int fd, fd2;
81	int errorno;
82	STRLEN dataoffset;
83	mode_t mode; /* open */
84	unsigned char cancelled;
85	} aio_cb;
86
87	typedef aio_cb *aio_req;	246	typedef eio_req *aio_req;
88	typedef aio_cb *aio_req_ornot;	247	typedef eio_req *aio_req_ornot;
89		248
90	static int started, wanted;	249	static SV *on_next_submit;
91	static volatile int nreqs;	250	static int next_pri = EIO_PRI_DEFAULT;
92	static int max_outstanding = 1<<30;	251	static int max_outstanding;
93	static int respipe [2];
94		252
95	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	253	static s_epipe respipe;
96	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
97	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
98		254
99	static volatile aio_req reqs, reqe; /* queue start, queue end */	255	static void req_destroy (aio_req req);
100	static volatile aio_req ress, rese; /* queue start, queue end */	256	static void req_cancel (aio_req req);
101		257
102	typedef struct aio_grp	258	static void want_poll (void)
103	{	259	{
104	struct aio_cb *first, *last;	260	/* write a dummy byte to the pipe so fh becomes ready */
105	SV *callback;	261	s_epipe_signal (&respipe);
106	int busycount;
107	} aio_grp;
108
109	static void aio_grp_begin (aio_grp *grp)
110	{
111	++grp->busycount;
112	}	262	}
113		263
114	static void aio_grp_end (aio_grp *grp)	264	static void done_poll (void)
115	{	265	{
116	--grp->busycount;	266	/* read any signals sent by the worker threads */
117		267	s_epipe_drain (&respipe);
118	if (grp->busycount)
119	return;
120
121	SvREFCNT_dec (grp->callback);
122	grp->callback = 0;
123	}
124
125	static aio_grp *aio_grp_new ()
126	{
127	aio_grp *grp;
128
129	Newz (0, grp, 1, aio_grp);
130	aio_grp_begin (grp);
131
132	return grp;
133	}	268	}
134		269
135	/* must be called at most once */	270	/* must be called at most once */
136	static SV *req_sv (aio_req req)	271	static SV *req_sv (aio_req req, HV *stash)
137	{	272	{
		273	if (!req->self)
		274	{
138	req->self = (SV *)newHV ();	275	req->self = (SV *)newHV ();
139	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	276	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		277	}
140		278
141	return sv_bless (newRV_noinc (req->self), gv_stashpv (AIO_CB_KLASS, 1));	279	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
142	}	280	}
143		281
144	static aio_req SvAIO_REQ (SV *sv)	282	static aio_req SvAIO_REQ (SV *sv)
145	{	283	{
146	if (!sv_derived_from (sv, AIO_CB_KLASS) || !SvROK (sv))	284	MAGIC *mg;
		285
		286	if (!SvROK (sv)
		287	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		288	&& SvSTASH (SvRV (sv)) != aio_req_stash
		289	&& !sv_derived_from (sv, "IO::AIO::REQ")))
147	croak ("object of class " AIO_CB_KLASS " expected");	290	croak ("object of class IO::AIO::REQ expected");
148		291
149	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	292	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
150		293
151	return mg ? (aio_req)mg->mg_ptr : 0;	294	return mg ? (aio_req)mg->mg_ptr : 0;
152	}	295	}
153		296
		297	static void aio_grp_feed (aio_req grp)
		298	{
		299	if (grp->sv2 && SvOK (grp->sv2))
		300	{
		301	dSP;
		302
		303	ENTER;
		304	SAVETMPS;
		305	PUSHMARK (SP);
		306	XPUSHs (req_sv (grp, aio_grp_stash));
		307	PUTBACK;
		308	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		309	SPAGAIN;
		310	FREETMPS;
		311	LEAVE;
		312	}
		313	}
		314
		315	static void req_submit (eio_req *req)
		316	{
		317	eio_submit (req);
		318
		319	if (expect_false (on_next_submit))
		320	{
		321	dSP;
		322	SV *cb = sv_2mortal (on_next_submit);
		323
		324	on_next_submit = 0;
		325
		326	PUSHMARK (SP);
		327	PUTBACK;
		328	call_sv (cb, G_DISCARD | G_EVAL);
		329	}
		330	}
		331
		332	static int req_invoke (eio_req *req)
		333	{
		334	if (req->flags & FLAG_SV2_RO_OFF)
		335	SvREADONLY_off (req->sv2);
		336
		337	if (!EIO_CANCELLED (req) && req->callback)
		338	{
		339	dSP;
		340	static SV *sv_result_cache; /* caches the result integer SV */
		341	SV *sv_result;
		342
		343	ENTER;
		344	SAVETMPS;
		345	PUSHMARK (SP);
		346	EXTEND (SP, 1);
		347
		348	/* do not recreate the result IV from scratch each time */
		349	if (expect_true (sv_result_cache))
		350	{
		351	sv_result = sv_result_cache; sv_result_cache = 0;
		352	SvIV_set (sv_result, req->result);
		353	}
		354	else
		355	{
		356	sv_result = newSViv (req->result);
		357	SvREADONLY_on (sv_result);
		358	}
		359
		360	switch (req->type)
		361	{
		362	case EIO_READDIR:
		363	{
		364	SV *rv = &PL_sv_undef;
		365
		366	if (req->result >= 0)
		367	{
		368	int i;
		369	char *names = (char *)req->ptr2;
		370	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		371	AV *av = newAV ();
		372
		373	av_extend (av, req->result - 1);
		374
		375	for (i = 0; i < req->result; ++i)
		376	{
		377	if (req->int1 & EIO_READDIR_DENTS)
		378	{
		379	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		380
		381	if (req->int1 & EIO_READDIR_CUSTOM2)
		382	{
		383	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		384	AV *avent = newAV ();
		385
		386	av_extend (avent, 2);
		387
		388	if (!sv_type [ent->type])
		389	{
		390	sv_type [ent->type] = newSViv (ent->type);
		391	SvREADONLY_on (sv_type [ent->type]);
		392	}
		393
		394	av_store (avent, 0, namesv);
		395	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		396	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		397
		398	av_store (av, i, newRV_noinc ((SV *)avent));
		399	}
		400	else
		401	av_store (av, i, namesv);
		402
		403	++ent;
		404	}
		405	else
		406	{
		407	SV *name = newSVpv (names, 0);
		408	av_store (av, i, name);
		409	names += SvCUR (name) + 1;
		410	}
		411	}
		412
		413	rv = sv_2mortal (newRV_noinc ((SV *)av));
		414	}
		415
		416	PUSHs (rv);
		417
		418	if (req->int1 & EIO_READDIR_CUSTOM1)
		419	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		420	}
		421	break;
		422
		423	case EIO_OPEN:
		424	{
		425	/* convert fd to fh */
		426	SV *fh = &PL_sv_undef;
		427
		428	if (req->result >= 0)
		429	{
		430	GV *gv = (GV *)sv_newmortal ();
		431	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		432	char sym [64];
		433	int symlen;
		434
		435	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		436	gv_init (gv, aio_stash, sym, symlen, 0);
		437
		438	symlen = snprintf (
		439	sym,
		440	sizeof (sym),
		441	"%s&=%d",
		442	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		443	(int)req->result
		444	);
		445
		446	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		447	fh = (SV *)gv;
		448	}
		449
		450	PUSHs (fh);
		451	}
		452	break;
		453
		454	case EIO_STATVFS:
		455	case EIO_FSTATVFS:
		456	{
		457	SV *rv = &PL_sv_undef;
		458
		459	if (req->result >= 0)
		460	{
		461	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		462	HV *hv = newHV ();
		463
		464	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		465
		466	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		467	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		468	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		469	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		470	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		471	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		472	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		473	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		474	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		475	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		476	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		477	}
		478
		479	PUSHs (rv);
		480	}
		481
		482	break;
		483
		484	case EIO_GROUP:
		485	req->int1 = 2; /* mark group as finished */
		486
		487	if (req->sv1)
		488	{
		489	int i;
		490	AV *av = (AV *)req->sv1;
		491
		492	EXTEND (SP, AvFILL (av) + 1);
		493	for (i = 0; i <= AvFILL (av); ++i)
		494	PUSHs (*av_fetch (av, i, 0));
		495	}
		496	break;
		497
		498	case EIO_NOP:
		499	case EIO_BUSY:
		500	break;
		501
		502	case EIO_READLINK:
		503	if (req->result > 0)
		504	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		505	break;
		506
		507	case EIO_STAT:
		508	case EIO_LSTAT:
		509	case EIO_FSTAT:
		510	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		511	PL_laststatval = req->result;
		512	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		513	PUSHs (sv_result);
		514	break;
		515
		516	case EIO_READ:
		517	{
		518	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		519	*SvEND (req->sv2) = 0;
		520	SvPOK_only (req->sv2);
		521	SvSETMAGIC (req->sv2);
		522	PUSHs (sv_result);
		523	}
		524	break;
		525
		526	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		527	if (req->result > 0)
		528	SvIV_set (sv_result, 0);
		529	/* FALLTHROUGH */
		530
		531	default:
		532	PUSHs (sv_result);
		533	break;
		534	}
		535
		536	errno = req->errorno;
		537
		538	PUTBACK;
		539	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		540	SPAGAIN;
		541
		542	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		543	SvREFCNT_dec (sv_result);
		544	else
		545	sv_result_cache = sv_result;
		546
		547	FREETMPS;
		548	LEAVE;
		549
		550	PUTBACK;
		551	}
		552
		553	return !!SvTRUE (ERRSV);
		554	}
		555
154	static void req_free (aio_req req)	556	static void req_destroy (aio_req req)
155	{	557	{
156	if (req->self)	558	if (req->self)
157	{	559	{
158	sv_unmagic (req->self, PERL_MAGIC_ext);	560	sv_unmagic (req->self, PERL_MAGIC_ext);
159	SvREFCNT_dec (req->self);	561	SvREFCNT_dec (req->self);
160	}	562	}
161		563
162	if (req->data)
163	SvREFCNT_dec (req->data);
164
165	if (req->fh)
166	SvREFCNT_dec (req->fh);	564	SvREFCNT_dec (req->sv1);
167
168	if (req->fh2)
169	SvREFCNT_dec (req->fh2);	565	SvREFCNT_dec (req->sv2);
170
171	if (req->statdata)
172	Safefree (req->statdata);
173
174	if (req->callback)
175	SvREFCNT_dec (req->callback);	566	SvREFCNT_dec (req->callback);
176
177	if (req->type == REQ_READDIR && req->result >= 0)
178	free (req->data2ptr);
179		567
180	Safefree (req);	568	Safefree (req);
181	}	569	}
182		570
		571	static void req_cancel_subs (aio_req grp)
		572	{
		573	aio_req sub;
		574
		575	if (grp->type != EIO_GROUP)
		576	return;
		577
		578	SvREFCNT_dec (grp->sv2);
		579	grp->sv2 = 0;
		580
		581	eio_grp_cancel (grp);
		582	}
		583
183	static void	584	static void
184	poll_wait ()	585	create_respipe (void)
185	{	586	{
186	if (nreqs && !ress)	587	if (s_epipe_renew (&respipe))
		588	croak ("IO::AIO: unable to initialize result pipe");
		589	}
		590
		591	static void poll_wait (void)
		592	{
		593	while (eio_nreqs ())
187	{	594	{
188	fd_set rfd;	595	int size;
189	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);
191		596
192	select (respipe [0] + 1, &rfd, 0, 0, 0);	597	X_LOCK (reslock);
		598	size = res_queue.size;
		599	X_UNLOCK (reslock);
		600
		601	if (size)
		602	return;
		603
		604	etp_maybe_start_thread ();
		605
		606	s_epipe_wait (&respipe);
193	}	607	}
194	}	608	}
195		609
196	static int	610	static int poll_cb (void)
197	poll_cb ()
198	{	611	{
199	dSP;
200	int count = 0;
201	int do_croak = 0;
202	aio_req req;
203
204	for (;;)	612	for (;;)
205	{	613	{
206	pthread_mutex_lock (&reslock);	614	int res = eio_poll ();
207	req = ress;
208		615
209	if (req)	616	if (res > 0)
210	{
211	ress = req->next;
212
213	if (!ress)
214	{
215	/* read any signals sent by the worker threads */
216	char buf [32];
217	while (read (respipe [0], buf, 32) == 32)
218	;
219
220	rese = 0;
221	}
222	}
223
224	pthread_mutex_unlock (&reslock);
225
226	if (!req)
227	break;
228
229	nreqs--;
230
231	if (req->type == REQ_QUIT)
232	started--;
233	else
234	{
235	int errorno = errno;
236	errno = req->errorno;
237
238	if (req->type == REQ_READ)
239	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
240
241	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
242	SvREADONLY_off (req->data);
243
244	if (req->statdata)
245	{
246	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
247	PL_laststatval = req->result;
248	PL_statcache = *(req->statdata);
249	}
250
251	ENTER;
252	PUSHMARK (SP);
253
254	if (req->type == REQ_READDIR)
255	{
256	SV *rv = &PL_sv_undef;
257
258	if (req->result >= 0)
259	{
260	char *buf = req->data2ptr;
261	AV *av = newAV ();
262
263	while (req->result)
264	{
265	SV *sv = newSVpv (buf, 0);
266
267	av_push (av, sv);
268	buf += SvCUR (sv) + 1;
269	req->result--;
270	}
271
272	rv = sv_2mortal (newRV_noinc ((SV *)av));
273	}
274
275	XPUSHs (rv);
276	}
277	else
278	{
279	XPUSHs (sv_2mortal (newSViv (req->result)));
280
281	if (req->type == REQ_OPEN)
282	{
283	/* convert fd to fh */
284	SV *fh;
285
286	PUTBACK;
287	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
288	SPAGAIN;
289
290	fh = SvREFCNT_inc (POPs);
291
292	PUSHMARK (SP);
293	XPUSHs (sv_2mortal (fh));
294	}
295	}
296
297	if (SvOK (req->callback) && !req->cancelled)
298	{
299	PUTBACK;
300	call_sv (req->callback, G_VOID | G_EVAL);
301	SPAGAIN;
302
303	if (SvTRUE (ERRSV))
304	{
305	req_free (req);
306	croak (0);	617	croak (0);
307	}
308	}
309		618
310	LEAVE;	619	if (!max_outstanding || max_outstanding > eio_nreqs ())
		620	return res;
311		621
312	errno = errorno;	622	poll_wait ();
313	count++;
314	}
315
316	req_free (req);
317	}	623	}
318
319	return count;
320	}	624	}
321		625
322	static void *aio_proc(void *arg);	626	static void atfork_child (void)
323
324	static void
325	start_thread (void)
326	{	627	{
327	sigset_t fullsigset, oldsigset;	628	create_respipe ();
328	pthread_t tid;
329	pthread_attr_t attr;
330
331	pthread_attr_init (&attr);
332	pthread_attr_setstacksize (&attr, STACKSIZE);
333	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
334
335	sigfillset (&fullsigset);
336	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
337
338	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
339	started++;
340
341	sigprocmask (SIG_SETMASK, &oldsigset, 0);
342	}
343
344	static void
345	req_send (aio_req req)
346	{
347	while (started < wanted && nreqs >= started)
348	start_thread ();
349
350	nreqs++;
351
352	pthread_mutex_lock (&reqlock);
353
354	req->next = 0;
355
356	if (reqe)
357	{
358	reqe->next = req;
359	reqe = req;
360	}
361	else
362	reqe = reqs = req;
363
364	pthread_cond_signal (&reqwait);
365	pthread_mutex_unlock (&reqlock);
366
367	if (nreqs > max_outstanding)
368	for (;;)
369	{
370	poll_cb ();
371
372	if (nreqs <= max_outstanding)
373	break;
374
375	poll_wait ();
376	}
377	}
378
379	static void
380	end_thread (void)
381	{
382	aio_req req;
383	Newz (0, req, 1, aio_cb);
384	req->type = REQ_QUIT;
385
386	req_send (req);
387	}
388
389	static void min_parallel (int nthreads)
390	{
391	if (wanted < nthreads)
392	wanted = nthreads;
393	}
394
395	static void max_parallel (int nthreads)
396	{
397	int cur = started;
398
399	if (wanted > nthreads)
400	wanted = nthreads;
401
402	while (cur > wanted)
403	{
404	end_thread ();
405	cur--;
406	}
407
408	while (started > wanted)
409	{
410	poll_wait ();
411	poll_cb ();
412	}
413	}
414
415	static void create_pipe ()
416	{
417	if (pipe (respipe))
418	croak ("unable to initialize result pipe");
419
420	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
421	croak ("cannot set result pipe to nonblocking mode");
422
423	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
424	croak ("cannot set result pipe to nonblocking mode");
425	}	629	}
426		630
427	/*****************************************************************************/	631	/*****************************************************************************/
428	/* work around various missing functions */
429		632
430	#if !HAVE_PREADWRITE	633	#if !_POSIX_MAPPED_FILES
431	# define pread aio_pread	634	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
432	# define pwrite aio_pwrite	635	# define munmap(addr,length) (errno = ENOSYS, -1)
433
434	/*
435	* make our pread/pwrite safe against themselves, but not against
436	* normal read/write by using a mutex. slows down execution a lot,
437	* but that's your problem, not mine.
438	*/
439	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
440
441	static ssize_t
442	pread (int fd, void *buf, size_t count, off_t offset)
443	{
444	ssize_t res;
445	off_t ooffset;
446
447	pthread_mutex_lock (&preadwritelock);
448	ooffset = lseek (fd, 0, SEEK_CUR);
449	lseek (fd, offset, SEEK_SET);
450	res = read (fd, buf, count);
451	lseek (fd, ooffset, SEEK_SET);
452	pthread_mutex_unlock (&preadwritelock);
453
454	return res;
455	}
456
457	static ssize_t
458	pwrite (int fd, void *buf, size_t count, off_t offset)
459	{
460	ssize_t res;
461	off_t ooffset;
462
463	pthread_mutex_lock (&preadwritelock);
464	ooffset = lseek (fd, 0, SEEK_CUR);
465	lseek (fd, offset, SEEK_SET);
466	res = write (fd, buf, count);
467	lseek (fd, offset, SEEK_SET);
468	pthread_mutex_unlock (&preadwritelock);
469
470	return res;
471	}
472	#endif	636	#endif
473		637
474	#if !HAVE_FDATASYNC	638	#define MMAP_MAGIC PERL_MAGIC_ext
475	# define fdatasync fsync
476	#endif
477		639
478	#if !HAVE_READAHEAD
479	# define readahead aio_readahead
480
481	static ssize_t
482	readahead (int fd, off_t offset, size_t count)
483	{
484	char readahead_buf[4096];
485
486	while (count > 0)
487	{
488	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
489
490	pread (fd, readahead_buf, len, offset);
491	offset += len;
492	count -= len;
493	}
494
495	errno = 0;
496	}
497	#endif
498
499	#if !HAVE_READDIR_R
500	# define readdir_r aio_readdir_r
501
502	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
503
504	static int	640	static int
505	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	641	mmap_free (pTHX_ SV *sv, MAGIC *mg)
506	{	642	{
507	struct dirent *e;	643	int old_errno = errno;
508	int errorno;	644	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
509
510	pthread_mutex_lock (&readdirlock);
511
512	e = readdir (dirp);
513	errorno = errno;	645	errno = old_errno;
514		646
515	if (e)	647	mg->mg_obj = 0; /* just in case */
516	{
517	*res = ent;
518	strcpy (ent->d_name, e->d_name);
519	}
520	else
521	*res = 0;
522		648
523	pthread_mutex_unlock (&readdirlock);	649	SvREADONLY_off (sv);
524		650
525	errno = errorno;	651	if (SvPVX (sv) != mg->mg_ptr)
526	return e ? 0 : -1;	652	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
527	}
528	#endif
529		653
530	/* sendfile always needs emulation */	654	SvCUR_set (sv, 0);
531	static ssize_t	655	SvPVX (sv) = 0;
532	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	656	SvOK_off (sv);
533	{
534	ssize_t res;
535		657
536	if (!count)
537	return 0;	658	return 0;
538
539	#if HAVE_SENDFILE
540	# if __linux
541	res = sendfile (ofd, ifd, &offset, count);
542
543	# elif __freebsd
544	/*
545	* Of course, the freebsd sendfile is a dire hack with no thoughts
546	* wasted on making it similar to other I/O functions.
547	*/
548	{
549	off_t sbytes;
550	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
551
552	if (res < 0 && sbytes)
553	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
554	res = sbytes;
555	}
556
557	# elif __hpux
558	res = sendfile (ofd, ifd, offset, count, 0, 0);
559
560	# elif __solaris
561	{
562	struct sendfilevec vec;
563	size_t sbytes;
564
565	vec.sfv_fd = ifd;
566	vec.sfv_flag = 0;
567	vec.sfv_off = offset;
568	vec.sfv_len = count;
569
570	res = sendfilev (ofd, &vec, 1, &sbytes);
571
572	if (res < 0 && sbytes)
573	res = sbytes;
574	}
575
576	# endif
577	#else
578	res = -1;
579	errno = ENOSYS;
580	#endif
581
582	if (res < 0
583	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
584	#if __solaris
585	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
586	#endif
587	)
588	)
589	{
590	/* emulate sendfile. this is a major pain in the ass */
591	char buf[4096];
592	res = 0;
593
594	while (count)
595	{
596	ssize_t cnt;
597
598	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
599
600	if (cnt <= 0)
601	{
602	if (cnt && !res) res = -1;
603	break;
604	}
605
606	cnt = write (ofd, buf, cnt);
607
608	if (cnt <= 0)
609	{
610	if (cnt && !res) res = -1;
611	break;
612	}
613
614	offset += cnt;
615	res += cnt;
616	count -= cnt;
617	}
618	}
619
620	return res;
621	}	659	}
622		660
623	/* read a full directory */	661	static MGVTBL mmap_vtbl = {
624	static int	662	0, 0, 0, 0, mmap_free
625	scandir_ (const char *path, void **namesp)	663	};
626	{
627	DIR *dirp = opendir (path);
628	union
629	{
630	struct dirent d;
631	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
632	} u;
633	struct dirent *entp;
634	char *name, *names;
635	int memlen = 4096;
636	int memofs = 0;
637	int res = 0;
638	int errorno;
639
640	if (!dirp)
641	return -1;
642
643	names = malloc (memlen);
644
645	for (;;)
646	{
647	errno = 0, readdir_r (dirp, &u.d, &entp);
648
649	if (!entp)
650	break;
651
652	name = entp->d_name;
653
654	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
655	{
656	int len = strlen (name) + 1;
657
658	res++;
659
660	while (memofs + len > memlen)
661	{
662	memlen *= 2;
663	names = realloc (names, memlen);
664	if (!names)
665	break;
666	}
667
668	memcpy (names + memofs, name, len);
669	memofs += len;
670	}
671	}
672
673	errorno = errno;
674	closedir (dirp);
675
676	if (errorno)
677	{
678	free (names);
679	errno = errorno;
680	res = -1;
681	}
682
683	*namesp = (void *)names;
684	return res;
685	}
686		664
687	/*****************************************************************************/	665	/*****************************************************************************/
688		666
689	static void *	667	static SV *
690	aio_proc (void *thr_arg)	668	get_cb (SV *cb_sv)
691	{	669	{
692	aio_req req;	670	SvGETMAGIC (cb_sv);
693	int type;	671	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
694
695	do
696	{
697	pthread_mutex_lock (&reqlock);
698
699	for (;;)
700	{
701	req = reqs;
702
703	if (reqs)
704	{
705	reqs = reqs->next;
706	if (!reqs) reqe = 0;
707	}
708
709	if (req)
710	break;
711
712	pthread_cond_wait (&reqwait, &reqlock);
713	}
714
715	pthread_mutex_unlock (&reqlock);
716
717	errno = 0; /* strictly unnecessary */
718
719	if (!req->cancelled)
720	switch (req->type)
721	{
722	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
723	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
724
725	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
726	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
727
728	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
729	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
730	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
731
732	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
733	case REQ_CLOSE: req->result = close (req->fd); break;
734	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
735	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
736	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
737	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
738	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
739
740	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
741	case REQ_FSYNC: req->result = fsync (req->fd); break;
742	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
743
744	case REQ_QUIT:
745	break;
746
747	default:
748	req->result = ENOSYS;
749	break;
750	}
751
752	req->errorno = errno;
753
754	pthread_mutex_lock (&reslock);
755
756	req->next = 0;
757
758	if (rese)
759	{
760	rese->next = req;
761	rese = req;
762	}
763	else
764	{
765	rese = ress = req;
766
767	/* write a dummy byte to the pipe so fh becomes ready */
768	write (respipe [1], &respipe, 1);
769	}
770
771	pthread_mutex_unlock (&reslock);
772	}
773	while (type != REQ_QUIT);
774
775	return 0;
776	}
777
778	/*****************************************************************************/
779
780	static void atfork_prepare (void)
781	{
782	pthread_mutex_lock (&reqlock);
783	pthread_mutex_lock (&reslock);
784	#if !HAVE_PREADWRITE
785	pthread_mutex_lock (&preadwritelock);
786	#endif
787	#if !HAVE_READDIR_R
788	pthread_mutex_lock (&readdirlock);
789	#endif
790	}
791
792	static void atfork_parent (void)
793	{
794	#if !HAVE_READDIR_R
795	pthread_mutex_unlock (&readdirlock);
796	#endif
797	#if !HAVE_PREADWRITE
798	pthread_mutex_unlock (&preadwritelock);
799	#endif
800	pthread_mutex_unlock (&reslock);
801	pthread_mutex_unlock (&reqlock);
802	}
803
804	static void atfork_child (void)
805	{
806	aio_req prv;
807
808	started = 0;
809
810	while (reqs)
811	{
812	prv = reqs;
813	reqs = prv->next;
814	req_free (prv);
815	}
816
817	reqs = reqe = 0;
818
819	while (ress)
820	{
821	prv = ress;
822	ress = prv->next;
823	req_free (prv);
824	}
825
826	ress = rese = 0;
827
828	close (respipe [0]);
829	close (respipe [1]);
830	create_pipe ();
831
832	atfork_parent ();
833	}	672	}
834		673
835	#define dREQ \	674	#define dREQ \
		675	SV *cb_cv; \
836	aio_req req; \	676	aio_req req; \
		677	int req_pri = next_pri; \
		678	next_pri = EIO_PRI_DEFAULT; \
837	\	679	\
838	if (SvOK (callback) && !SvROK (callback)) \	680	cb_cv = get_cb (callback); \
839	croak ("callback must be undef or of reference type"); \
840	\	681	\
841	Newz (0, req, 1, aio_cb); \	682	Newz (0, req, 1, eio_req); \
842	if (!req) \	683	if (!req) \
843	croak ("out of memory during aio_req allocation"); \	684	croak ("out of memory during eio_req allocation"); \
844	\	685	\
845	req->callback = newSVsv (callback)	686	req->callback = SvREFCNT_inc (cb_cv); \
		687	req->pri = req_pri
846		688
847	#define REQ_SEND \	689	#define REQ_SEND \
		690	PUTBACK; \
848	req_send (req); \	691	req_submit (req); \
		692	SPAGAIN; \
849	\	693	\
850	if (GIMME_V != G_VOID) \	694	if (GIMME_V != G_VOID) \
851	XPUSHs (req_sv (req));	695	XPUSHs (req_sv (req, aio_req_stash));
852		696
853	MODULE = IO::AIO PACKAGE = IO::AIO	697	MODULE = IO::AIO PACKAGE = IO::AIO
854		698
855	PROTOTYPES: ENABLE	699	PROTOTYPES: ENABLE
856		700
857	BOOT:	701	BOOT:
858	{	702	{
		703	static const struct {
		704	const char *name;
		705	IV iv;
		706	} *civ, const_iv[] = {
		707	# define const_niv(name, value) { # name, (IV) value },
		708	# define const_iv(name) { # name, (IV) name },
		709	# define const_eio(name) { # name, (IV) EIO_ ## name },
		710	const_iv (EXDEV)
		711	const_iv (ENOSYS)
		712	const_iv (O_RDONLY)
		713	const_iv (O_WRONLY)
		714	const_iv (O_RDWR)
		715	const_iv (O_CREAT)
		716	const_iv (O_TRUNC)
		717	const_iv (O_EXCL)
		718	const_iv (O_APPEND)
		719	#ifndef _WIN32
		720	const_iv (S_IFIFO)
		721	#endif
		722	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		723	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		724	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		725	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		726	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		727	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		728
		729	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		730	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		731	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		732	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		733	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		734
		735	const_iv (ST_RDONLY)
		736	const_iv (ST_NOSUID)
		737	const_iv (ST_NODEV)
		738	const_iv (ST_NOEXEC)
		739	const_iv (ST_SYNCHRONOUS)
		740	const_iv (ST_MANDLOCK)
		741	const_iv (ST_WRITE)
		742	const_iv (ST_APPEND)
		743	const_iv (ST_IMMUTABLE)
		744	const_iv (ST_NOATIME)
		745	const_iv (ST_NODIRATIME)
		746	const_iv (ST_RELATIME)
		747
		748	const_iv (PROT_EXEC)
		749	const_iv (PROT_NONE)
		750	const_iv (PROT_READ)
		751	const_iv (PROT_WRITE)
		752
		753	/*const_iv (MAP_FIXED)*/
		754	const_iv (MAP_PRIVATE)
		755	const_iv (MAP_SHARED)
		756	const_iv (MAP_ANONYMOUS)
		757
		758	/* linuxish */
		759	const_iv (MAP_HUGETLB)
		760	const_iv (MAP_LOCKED)
		761	const_iv (MAP_NORESERVE)
		762	const_iv (MAP_POPULATE)
		763	const_iv (MAP_NONBLOCK)
		764
		765	const_iv (MCL_FUTURE)
		766	const_iv (MCL_CURRENT)
		767
		768	const_eio (MS_ASYNC)
		769	const_eio (MS_INVALIDATE)
		770	const_eio (MS_SYNC)
		771
		772	const_eio (MT_MODIFY)
		773
		774	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		775	const_eio (SYNC_FILE_RANGE_WRITE)
		776	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		777
		778	const_eio (READDIR_DENTS)
		779	const_eio (READDIR_DIRS_FIRST)
		780	const_eio (READDIR_STAT_ORDER)
		781	const_eio (READDIR_FOUND_UNKNOWN)
		782
		783	const_eio (DT_UNKNOWN)
		784	const_eio (DT_FIFO)
		785	const_eio (DT_CHR)
		786	const_eio (DT_DIR)
		787	const_eio (DT_BLK)
		788	const_eio (DT_REG)
		789	const_eio (DT_LNK)
		790	const_eio (DT_SOCK)
		791	const_eio (DT_WHT)
		792	};
		793
859	HV *stash = gv_stashpv ("IO::AIO", 1);	794	aio_stash = gv_stashpv ("IO::AIO" , 1);
860	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	795	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
861	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	796	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
862	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
863		797
		798	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		799	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		800
		801	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		802
864	create_pipe ();	803	create_respipe ();
865	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
866	}
867		804
		805	if (eio_init (want_poll, done_poll) < 0)
		806	croak ("IO::AIO: unable to initialise eio library");
		807
		808	/* atfork child called in fifo order, so before eio's handler */
		809	X_THREAD_ATFORK (0, 0, atfork_child);
		810	}
		811
868	void	812	void
869	min_parallel (nthreads)	813	max_poll_reqs (int nreqs)
870	int nthreads
871	PROTOTYPE: $	814	PROTOTYPE: $
		815	CODE:
		816	eio_set_max_poll_reqs (nreqs);
872		817
873	void	818	void
874	max_parallel (nthreads)	819	max_poll_time (double nseconds)
875	int nthreads
876	PROTOTYPE: $	820	PROTOTYPE: $
877
878	int
879	max_outstanding (nreqs)
880	int nreqs
881	PROTOTYPE: $
882	CODE:	821	CODE:
883	RETVAL = max_outstanding;	822	eio_set_max_poll_time (nseconds);
		823
		824	void
		825	min_parallel (int nthreads)
		826	PROTOTYPE: $
		827	CODE:
		828	eio_set_min_parallel (nthreads);
		829
		830	void
		831	max_parallel (int nthreads)
		832	PROTOTYPE: $
		833	CODE:
		834	eio_set_max_parallel (nthreads);
		835
		836	void
		837	max_idle (int nthreads)
		838	PROTOTYPE: $
		839	CODE:
		840	eio_set_max_idle (nthreads);
		841
		842	void
		843	max_outstanding (int maxreqs)
		844	PROTOTYPE: $
		845	CODE:
884	max_outstanding = nreqs;	846	max_outstanding = maxreqs;
885		847
886	void	848	void
887	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	849	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
888	SV * pathname
889	int flags
890	int mode
891	SV * callback
892	PROTOTYPE: $$$;$	850	PROTOTYPE: $$$;$
893	PPCODE:	851	PPCODE:
894	{	852	{
895	dREQ;	853	dREQ;
896		854
897	req->type = REQ_OPEN;	855	req->type = EIO_OPEN;
898	req->data = newSVsv (pathname);	856	req->sv1 = newSVsv (pathname);
899	req->dataptr = SvPVbyte_nolen (req->data);	857	req->ptr1 = SvPVbyte_nolen (req->sv1);
900	req->fd = flags;	858	req->int1 = flags;
901	req->mode = mode;	859	req->int2 = mode;
902		860
903	REQ_SEND;	861	REQ_SEND;
904	}	862	}
905		863
906	void	864	void
907	aio_close (fh,callback=&PL_sv_undef)	865	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
908	SV * fh
909	SV * callback
910	PROTOTYPE: $;$	866	PROTOTYPE: $;$
911	ALIAS:	867	ALIAS:
912	aio_close = REQ_CLOSE
913	aio_fsync = REQ_FSYNC	868	aio_fsync = EIO_FSYNC
914	aio_fdatasync = REQ_FDATASYNC	869	aio_fdatasync = EIO_FDATASYNC
915	PPCODE:	870	PPCODE:
916	{	871	{
		872	int fd = s_fileno_croak (fh, 0);
917	dREQ;	873	dREQ;
918		874
919	req->type = ix;	875	req->type = ix;
920	req->fh = newSVsv (fh);	876	req->sv1 = newSVsv (fh);
921	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	877	req->int1 = fd;
922		878
923	REQ_SEND (req);	879	REQ_SEND (req);
924	}	880	}
925		881
926	void	882	void
		883	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		884	PROTOTYPE: $$$$;$
		885	PPCODE:
		886	{
		887	int fd = s_fileno_croak (fh, 0);
		888	dREQ;
		889
		890	req->type = EIO_SYNC_FILE_RANGE;
		891	req->sv1 = newSVsv (fh);
		892	req->int1 = fd;
		893	req->offs = offset;
		894	req->size = nbytes;
		895	req->int2 = flags;
		896
		897	REQ_SEND (req);
		898	}
		899
		900	void
		901	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		902	PROTOTYPE: $;$
		903	PPCODE:
		904	{
		905	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		906	int fd = s_fileno_croak (fh, 0);
		907	dREQ;
		908
		909	if (close_pipe < 0)
		910	{
		911	int pipefd [2];
		912
		913	if (pipe (pipefd) < 0
		914	|| close (pipefd [1]) < 0
		915	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		916	abort (); /*D*/
		917
		918	close_pipe = pipefd [0];
		919	}
		920
		921	req->type = EIO_DUP2;
		922	req->int1 = close_pipe;
		923	req->sv2 = newSVsv (fh);
		924	req->int2 = fd;
		925
		926	REQ_SEND (req);
		927	}
		928
		929	void
927	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	930	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
928	SV * fh
929	UV offset
930	UV length
931	SV * data
932	UV dataoffset
933	SV * callback
934	ALIAS:	931	ALIAS:
935	aio_read = REQ_READ	932	aio_read = EIO_READ
936	aio_write = REQ_WRITE	933	aio_write = EIO_WRITE
937	PROTOTYPE: $$$$$;$	934	PROTOTYPE: $$$$$;$
938	PPCODE:	935	PPCODE:
939	{	936	{
940	aio_req req;
941	STRLEN svlen;	937	STRLEN svlen;
		938	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
942	char *svptr = SvPVbyte (data, svlen);	939	char *svptr = SvPVbyte (data, svlen);
943		940	UV len = SvUV (length);
944	SvUPGRADE (data, SVt_PV);
945	SvPOK_on (data);
946		941
947	if (dataoffset < 0)	942	if (dataoffset < 0)
948	dataoffset += svlen;	943	dataoffset += svlen;
949		944
950	if (dataoffset < 0 || dataoffset > svlen)	945	if (dataoffset < 0 || dataoffset > svlen)
951	croak ("data offset outside of string");	946	croak ("dataoffset outside of data scalar");
952		947
953	if (ix == REQ_WRITE)	948	if (ix == EIO_WRITE)
954	{	949	{
955	/* write: check length and adjust. */	950	/* write: check length and adjust. */
956	if (length < 0 || length + dataoffset > svlen)	951	if (!SvOK (length) || len + dataoffset > svlen)
957	length = svlen - dataoffset;	952	len = svlen - dataoffset;
958	}	953	}
959	else	954	else
960	{	955	{
961	/* read: grow scalar as necessary */	956	/* read: check type and grow scalar as necessary */
		957	SvUPGRADE (data, SVt_PV);
962	svptr = SvGROW (data, length + dataoffset);	958	svptr = SvGROW (data, len + dataoffset + 1);
963	}	959	}
964
965	if (length < 0)
966	croak ("length must not be negative");
967		960
968	{	961	{
969	dREQ;	962	dREQ;
970		963
971	req->type = ix;	964	req->type = ix;
972	req->fh = newSVsv (fh);	965	req->sv1 = newSVsv (fh);
973	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	966	req->int1 = fd;
974	: IoOFP (sv_2io (fh)));	967	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
975	req->offset = offset;	968	req->size = len;
976	req->length = length;
977	req->data = SvREFCNT_inc (data);	969	req->sv2 = SvREFCNT_inc (data);
978	req->dataptr = (char *)svptr + dataoffset;	970	req->ptr2 = (char *)svptr + dataoffset;
		971	req->stroffset = dataoffset;
979		972
980	if (!SvREADONLY (data))	973	if (!SvREADONLY (data))
981	{	974	{
982	SvREADONLY_on (data);	975	SvREADONLY_on (data);
983	req->data2ptr = (void *)data;	976	req->flags |= FLAG_SV2_RO_OFF;
984	}	977	}
985		978
986	REQ_SEND;	979	REQ_SEND;
987	}	980	}
988	}	981	}
989		982
990	void	983	void
		984	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		985	PROTOTYPE: $$;$
		986	PPCODE:
		987	{
		988	SV *data;
		989	dREQ;
		990
		991	req->type = EIO_READLINK;
		992	req->sv1 = newSVsv (path);
		993	req->ptr1 = SvPVbyte_nolen (req->sv1);
		994
		995	REQ_SEND;
		996	}
		997
		998	void
991	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	999	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
992	SV * out_fh
993	SV * in_fh
994	UV in_offset
995	UV length
996	SV * callback
997	PROTOTYPE: $$$$;$	1000	PROTOTYPE: $$$$;$
998	PPCODE:	1001	PPCODE:
999	{	1002	{
		1003	int ifd = s_fileno_croak (in_fh , 0);
		1004	int ofd = s_fileno_croak (out_fh, 1);
1000	dREQ;	1005	dREQ;
1001		1006
1002	req->type = REQ_SENDFILE;	1007	req->type = EIO_SENDFILE;
1003	req->fh = newSVsv (out_fh);	1008	req->sv1 = newSVsv (out_fh);
1004	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1009	req->int1 = ofd;
1005	req->fh2 = newSVsv (in_fh);	1010	req->sv2 = newSVsv (in_fh);
1006	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1011	req->int2 = ifd;
1007	req->offset = in_offset;	1012	req->offs = in_offset;
1008	req->length = length;	1013	req->size = length;
1009		1014
1010	REQ_SEND;	1015	REQ_SEND;
1011	}	1016	}
1012		1017
1013	void	1018	void
1014	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1019	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1015	SV * fh
1016	UV offset
1017	IV length
1018	SV * callback
1019	PROTOTYPE: $$$;$	1020	PROTOTYPE: $$$;$
1020	PPCODE:	1021	PPCODE:
1021	{	1022	{
		1023	int fd = s_fileno_croak (fh, 0);
1022	dREQ;	1024	dREQ;
1023		1025
1024	req->type = REQ_READAHEAD;	1026	req->type = EIO_READAHEAD;
1025	req->fh = newSVsv (fh);	1027	req->sv1 = newSVsv (fh);
1026	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1028	req->int1 = fd;
1027	req->offset = offset;	1029	req->offs = offset;
1028	req->length = length;	1030	req->size = length;
1029		1031
1030	REQ_SEND;	1032	REQ_SEND;
1031	}	1033	}
1032		1034
1033	void	1035	void
1034	aio_stat (fh_or_path,callback=&PL_sv_undef)	1036	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1035	SV * fh_or_path
1036	SV * callback
1037	ALIAS:	1037	ALIAS:
1038	aio_stat = REQ_STAT	1038	aio_stat = EIO_STAT
1039	aio_lstat = REQ_LSTAT	1039	aio_lstat = EIO_LSTAT
		1040	aio_statvfs = EIO_STATVFS
1040	PPCODE:	1041	PPCODE:
1041	{	1042	{
1042	dREQ;	1043	dREQ;
1043		1044
1044	New (0, req->statdata, 1, Stat_t);	1045	req->sv1 = newSVsv (fh_or_path);
1045	if (!req->statdata)
1046	{
1047	req_free (req);
1048	croak ("out of memory during aio_req->statdata allocation");
1049	}
1050		1046
1051	if (SvPOK (fh_or_path))	1047	if (SvPOK (req->sv1))
1052	{	1048	{
1053	req->type = ix;	1049	req->type = ix;
1054	req->data = newSVsv (fh_or_path);
1055	req->dataptr = SvPVbyte_nolen (req->data);	1050	req->ptr1 = SvPVbyte_nolen (req->sv1);
1056	}	1051	}
1057	else	1052	else
1058	{	1053	{
1059	req->type = REQ_FSTAT;	1054	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1060	req->fh = newSVsv (fh_or_path);
1061	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1055	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1062	}	1056	}
1063		1057
1064	REQ_SEND;	1058	REQ_SEND;
1065	}	1059	}
1066		1060
1067	void	1061	void
		1062	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1063	PPCODE:
		1064	{
		1065	dREQ;
		1066
		1067	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1068	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1069	req->sv1 = newSVsv (fh_or_path);
		1070
		1071	if (SvPOK (req->sv1))
		1072	{
		1073	req->type = EIO_UTIME;
		1074	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1075	}
		1076	else
		1077	{
		1078	req->type = EIO_FUTIME;
		1079	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1080	}
		1081
		1082	REQ_SEND;
		1083	}
		1084
		1085	void
		1086	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1087	PPCODE:
		1088	{
		1089	dREQ;
		1090
		1091	req->sv1 = newSVsv (fh_or_path);
		1092	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1093
		1094	if (SvPOK (req->sv1))
		1095	{
		1096	req->type = EIO_TRUNCATE;
		1097	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1098	}
		1099	else
		1100	{
		1101	req->type = EIO_FTRUNCATE;
		1102	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1103	}
		1104
		1105	REQ_SEND;
		1106	}
		1107
		1108	void
		1109	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1110	ALIAS:
		1111	aio_chmod = EIO_CHMOD
		1112	aio_mkdir = EIO_MKDIR
		1113	PPCODE:
		1114	{
		1115	dREQ;
		1116
		1117	req->int2 = mode;
		1118	req->sv1 = newSVsv (fh_or_path);
		1119
		1120	if (SvPOK (req->sv1))
		1121	{
		1122	req->type = ix;
		1123	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1124	}
		1125	else
		1126	{
		1127	req->type = EIO_FCHMOD;
		1128	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1129	}
		1130
		1131	REQ_SEND;
		1132	}
		1133
		1134	void
		1135	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1136	PPCODE:
		1137	{
		1138	dREQ;
		1139
		1140	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1141	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1142	req->sv1 = newSVsv (fh_or_path);
		1143
		1144	if (SvPOK (req->sv1))
		1145	{
		1146	req->type = EIO_CHOWN;
		1147	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1148	}
		1149	else
		1150	{
		1151	req->type = EIO_FCHOWN;
		1152	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1153	}
		1154
		1155	REQ_SEND;
		1156	}
		1157
		1158	void
		1159	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1160	PPCODE:
		1161	{
		1162	dREQ;
		1163
		1164	req->type = EIO_READDIR;
		1165	req->sv1 = newSVsv (pathname);
		1166	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1167	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1168
		1169	if (flags & EIO_READDIR_DENTS)
		1170	req->int1 |= EIO_READDIR_CUSTOM2;
		1171
		1172	REQ_SEND;
		1173	}
		1174
		1175	void
1068	aio_unlink (pathname,callback=&PL_sv_undef)	1176	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1069	SV * pathname
1070	SV * callback
1071	ALIAS:	1177	ALIAS:
1072	aio_unlink = REQ_UNLINK	1178	aio_unlink = EIO_UNLINK
1073	aio_rmdir = REQ_RMDIR	1179	aio_rmdir = EIO_RMDIR
1074	aio_readdir = REQ_READDIR	1180	aio_readdir = EIO_READDIR
1075	PPCODE:	1181	PPCODE:
1076	{	1182	{
1077	dREQ;	1183	dREQ;
1078		1184
1079	req->type = ix;	1185	req->type = ix;
1080	req->data = newSVsv (pathname);	1186	req->sv1 = newSVsv (pathname);
1081	req->dataptr = SvPVbyte_nolen (req->data);	1187	req->ptr1 = SvPVbyte_nolen (req->sv1);
1082		1188
1083	REQ_SEND;	1189	REQ_SEND;
1084	}	1190	}
1085		1191
1086	void	1192	void
1087	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1193	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1088	SV * oldpath
1089	SV * newpath
1090	SV * callback
1091	ALIAS:	1194	ALIAS:
1092	aio_link = REQ_LINK	1195	aio_link = EIO_LINK
1093	aio_symlink = REQ_SYMLINK	1196	aio_symlink = EIO_SYMLINK
1094	aio_rename = REQ_RENAME	1197	aio_rename = EIO_RENAME
1095	PPCODE:	1198	PPCODE:
1096	{	1199	{
1097	dREQ;	1200	dREQ;
1098		1201
1099	req->type = ix;	1202	req->type = ix;
1100	req->fh = newSVsv (oldpath);	1203	req->sv1 = newSVsv (oldpath);
1101	req->data2ptr = SvPVbyte_nolen (req->fh);	1204	req->ptr1 = SvPVbyte_nolen (req->sv1);
1102	req->data = newSVsv (newpath);	1205	req->sv2 = newSVsv (newpath);
1103	req->dataptr = SvPVbyte_nolen (req->data);	1206	req->ptr2 = SvPVbyte_nolen (req->sv2);
1104		1207
1105	REQ_SEND;	1208	REQ_SEND;
1106	}	1209	}
1107		1210
1108	#if 0
1109
1110	# undocumented, because it does not cancel active requests
1111	void	1211	void
1112	cancel_most_requests ()	1212	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1213	PPCODE:
		1214	{
		1215	dREQ;
		1216
		1217	req->type = EIO_MKNOD;
		1218	req->sv1 = newSVsv (pathname);
		1219	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1220	req->int2 = (mode_t)mode;
		1221	req->offs = dev;
		1222
		1223	REQ_SEND;
		1224	}
		1225
		1226	void
		1227	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1228	ALIAS:
		1229	aio_mtouch = EIO_MTOUCH
		1230	aio_msync = EIO_MSYNC
1113	PROTOTYPE:	1231	PROTOTYPE: $$$$;$
1114	CODE:	1232	PPCODE:
1115	{	1233	{
1116	aio_req *req;	1234	STRLEN svlen;
		1235	UV len = SvUV (length);
		1236	char *svptr = SvPVbyte (data, svlen);
1117		1237
1118	pthread_mutex_lock (&reqlock);	1238	if (offset < 0)
1119	for (req = reqs; req; req = req->next)	1239	offset += svlen;
1120	req->flags |= 1;
1121	pthread_mutex_unlock (&reqlock);
1122		1240
1123	pthread_mutex_lock (&reslock);	1241	if (offset < 0 || offset > svlen)
1124	for (req = ress; req; req = req->next)	1242	croak ("offset outside of scalar");
1125	req->flags |= 1;
1126	pthread_mutex_unlock (&reslock);
1127	}
1128		1243
1129	#endif	1244	if (!SvOK (length) || len + offset > svlen)
		1245	len = svlen - offset;
		1246
		1247	{
		1248	dREQ;
		1249
		1250	req->type = ix;
		1251	req->size = len;
		1252	req->sv2 = SvREFCNT_inc (data);
		1253	req->ptr2 = (char *)svptr + offset;
		1254	req->int1 = flags;
		1255
		1256	REQ_SEND;
		1257	}
		1258	}
		1259
		1260	void
		1261	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1262	PPCODE:
		1263	{
		1264	dREQ;
		1265
		1266	req->type = EIO_BUSY;
		1267	req->nv1 = delay < 0. ? 0. : delay;
		1268
		1269	REQ_SEND;
		1270	}
		1271
		1272	void
		1273	aio_group (SV *callback=&PL_sv_undef)
		1274	PROTOTYPE: ;$
		1275	PPCODE:
		1276	{
		1277	dREQ;
		1278
		1279	req->type = EIO_GROUP;
		1280
		1281	req_submit (req);
		1282	XPUSHs (req_sv (req, aio_grp_stash));
		1283	}
		1284
		1285	void
		1286	aio_nop (SV *callback=&PL_sv_undef)
		1287	ALIAS:
		1288	aio_nop = EIO_NOP
		1289	aio_sync = EIO_SYNC
		1290	PPCODE:
		1291	{
		1292	dREQ;
		1293
		1294	req->type = ix;
		1295
		1296	REQ_SEND;
		1297	}
		1298
		1299	int
		1300	aioreq_pri (int pri = 0)
		1301	PROTOTYPE: ;$
		1302	CODE:
		1303	RETVAL = next_pri;
		1304	if (items > 0)
		1305	{
		1306	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1307	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1308	next_pri = pri;
		1309	}
		1310	OUTPUT:
		1311	RETVAL
		1312
		1313	void
		1314	aioreq_nice (int nice = 0)
		1315	CODE:
		1316	nice = next_pri - nice;
		1317	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1318	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1319	next_pri = nice;
1130		1320
1131	void	1321	void
1132	flush ()	1322	flush ()
1133	PROTOTYPE:	1323	PROTOTYPE:
1134	CODE:	1324	CODE:
1135	while (nreqs)	1325	while (eio_nreqs ())
1136	{	1326	{
1137	poll_wait ();	1327	poll_wait ();
1138	poll_cb ();	1328	poll_cb ();
1139	}	1329	}
1140		1330
1141	void	1331	int
1142	poll()	1332	poll()
1143	PROTOTYPE:	1333	PROTOTYPE:
1144	CODE:	1334	CODE:
1145	if (nreqs)
1146	{
1147	poll_wait ();	1335	poll_wait ();
1148	poll_cb ();	1336	RETVAL = poll_cb ();
1149	}	1337	OUTPUT:
		1338	RETVAL
1150		1339
1151	int	1340	int
1152	poll_fileno()	1341	poll_fileno()
1153	PROTOTYPE:	1342	PROTOTYPE:
1154	CODE:	1343	CODE:
1155	RETVAL = respipe [0];	1344	RETVAL = s_epipe_fd (&respipe);
1156	OUTPUT:	1345	OUTPUT:
1157	RETVAL	1346	RETVAL
1158		1347
1159	int	1348	int
1160	poll_cb(...)	1349	poll_cb(...)
…		…
1166		1355
1167	void	1356	void
1168	poll_wait()	1357	poll_wait()
1169	PROTOTYPE:	1358	PROTOTYPE:
1170	CODE:	1359	CODE:
1171	if (nreqs)
1172	poll_wait ();	1360	poll_wait ();
1173		1361
1174	int	1362	int
1175	nreqs()	1363	nreqs()
1176	PROTOTYPE:	1364	PROTOTYPE:
1177	CODE:	1365	CODE:
1178	RETVAL = nreqs;	1366	RETVAL = eio_nreqs ();
1179	OUTPUT:	1367	OUTPUT:
1180	RETVAL	1368	RETVAL
1181		1369
		1370	int
		1371	nready()
		1372	PROTOTYPE:
		1373	CODE:
		1374	RETVAL = eio_nready ();
		1375	OUTPUT:
		1376	RETVAL
		1377
		1378	int
		1379	npending()
		1380	PROTOTYPE:
		1381	CODE:
		1382	RETVAL = eio_npending ();
		1383	OUTPUT:
		1384	RETVAL
		1385
		1386	int
		1387	nthreads()
		1388	PROTOTYPE:
		1389	CODE:
		1390	RETVAL = eio_nthreads ();
		1391	OUTPUT:
		1392	RETVAL
		1393
		1394	int
		1395	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1396	PROTOTYPE: $$$$
		1397	CODE:
		1398	RETVAL = posix_fadvise (fh, offset, length, advice);
		1399	OUTPUT:
		1400	RETVAL
		1401
		1402	ssize_t
		1403	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1404	PROTOTYPE: $$$$
		1405	CODE:
		1406	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1407	OUTPUT:
		1408	RETVAL
		1409
		1410	void
		1411	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1412	PROTOTYPE: $$$$$;$
		1413	PPCODE:
		1414	sv_unmagic (scalar, MMAP_MAGIC);
		1415	{
		1416	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1417	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1418	if (addr == (void *)-1)
		1419	XSRETURN_NO;
		1420
		1421	sv_force_normal (scalar);
		1422
		1423	/* we store the length in mg_obj, as namlen is I32 :/ */
		1424	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1425	->mg_obj = (SV *)length;
		1426
		1427	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1428
		1429	if (!(prot & PROT_WRITE))
		1430	SvREADONLY_on (scalar);
		1431
		1432	if (SvLEN (scalar))
		1433	Safefree (SvPVX (scalar));
		1434
		1435	SvPVX (scalar) = (char *)addr;
		1436	SvCUR_set (scalar, length);
		1437	SvLEN_set (scalar, 0);
		1438	SvPOK_only (scalar);
		1439
		1440	XSRETURN_YES;
		1441	}
		1442
		1443	void
		1444	munmap (SV *scalar)
		1445	PROTOTYPE: $
		1446	CODE:
		1447	sv_unmagic (scalar, MMAP_MAGIC);
		1448
		1449	int
		1450	madvise (SV *scalar, off_t offset, off_t length, IV advice)
		1451	PROTOTYPE: $$$$
		1452	CODE:
		1453	{
		1454	char *addr = SvPV_nolen (scalar) + offset;
		1455
		1456	if (!SvOK (ST (2)))
		1457	length = SvCUR (scalar) - offset;
		1458
		1459	if (addr >= SvEND (scalar) || length <= 0)
		1460	XSRETURN_EMPTY;
		1461
		1462	RETVAL = posix_madvise (addr, length, advice);
		1463	}
		1464	OUTPUT:
		1465	RETVAL
		1466
		1467	int
		1468	mlockall (int flags)
		1469	PROTOTYPE: $
		1470	CODE:
		1471	#if _POSIX_MEMLOCK
		1472	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1473	extern int mallopt (int, int);
		1474	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1475	#endif
		1476	mlockall (flags);
		1477	#else
		1478	RETVAL = -1;
		1479	errno = ENOSYS;
		1480	#endif
		1481	OUTPUT:
		1482	RETVAL
		1483
		1484	int
		1485	munlockall ()
		1486	PROTOTYPE:
		1487	CODE:
		1488	#if _POSIX_MEMLOCK
		1489	munlockall ();
		1490	#else
		1491	RETVAL = -1;
		1492	errno = ENOSYS;
		1493	#endif
		1494	OUTPUT:
		1495	RETVAL
		1496
		1497	void _on_next_submit (SV *cb)
		1498	CODE:
		1499	SvREFCNT_dec (on_next_submit);
		1500	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1501
		1502	PROTOTYPES: DISABLE
		1503
1182	MODULE = IO::AIO PACKAGE = IO::AIO::CB	1504	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1183		1505
1184	void	1506	void
1185	cancel (aio_req_ornot req)	1507	cancel (aio_req_ornot req)
1186	PROTOTYPE:	1508	CODE:
		1509	eio_cancel (req);
		1510
		1511	void
		1512	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1187	CODE:	1513	PPCODE:
1188	req->cancelled = 1;	1514	{
		1515	if (GIMME_V != G_VOID)
		1516	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
1189		1517
		1518	if (items > 1)
		1519	{
		1520	SV *cb_cv =get_cb (callback);
		1521
		1522	SvREFCNT_dec (req->callback);
		1523	req->callback = SvREFCNT_inc (cb_cv);
		1524	}
		1525	}
		1526
		1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1528
		1529	void
		1530	add (aio_req grp, ...)
		1531	PPCODE:
		1532	{
		1533	int i;
		1534
		1535	if (grp->int1 == 2)
		1536	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1537
		1538	for (i = 1; i < items; ++i )
		1539	{
		1540	aio_req req;
		1541
		1542	if (GIMME_V != G_VOID)
		1543	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1544
		1545	req = SvAIO_REQ (ST (i));
		1546
		1547	if (req)
		1548	eio_grp_add (grp, req);
		1549	}
		1550	}
		1551
		1552	void
		1553	cancel_subs (aio_req_ornot req)
		1554	CODE:
		1555	req_cancel_subs (req);
		1556
		1557	void
		1558	result (aio_req grp, ...)
		1559	CODE:
		1560	{
		1561	int i;
		1562	AV *av;
		1563
		1564	grp->errorno = errno;
		1565
		1566	av = newAV ();
		1567	av_extend (av, items - 1);
		1568
		1569	for (i = 1; i < items; ++i )
		1570	av_push (av, newSVsv (ST (i)));
		1571
		1572	SvREFCNT_dec (grp->sv1);
		1573	grp->sv1 = (SV *)av;
		1574	}
		1575
		1576	void
		1577	errno (aio_req grp, int errorno = errno)
		1578	CODE:
		1579	grp->errorno = errorno;
		1580
		1581	void
		1582	limit (aio_req grp, int limit)
		1583	CODE:
		1584	eio_grp_limit (grp, limit);
		1585
		1586	void
		1587	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1588	CODE:
		1589	{
		1590	SvREFCNT_dec (grp->sv2);
		1591	grp->sv2 = newSVsv (callback);
		1592	grp->feed = aio_grp_feed;
		1593
		1594	if (grp->int2 <= 0)
		1595	grp->int2 = 2;
		1596
		1597	eio_grp_limit (grp, grp->int2);
		1598	}
		1599

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