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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.61 by root, Mon Oct 23 22:44:21 2006 UTC vs.
Revision 1.176 by root, Thu Dec 2 10:04:47 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/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_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_GROUP, REQ_NOP,
61	REQ_SLEEP,
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	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	Stat_t *statdata;
75	off_t offset;
76	size_t length;
77	ssize_t result;
78
79	STRLEN dataoffset;
80	int type;
81	int fd, fd2;
82	int errorno;
83	mode_t mode; /* open */
84
85	unsigned char flags;
86	unsigned char pri;
87
88	SV *self; /* the perl counterpart of this request, if any */
89	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
90	} aio_cb;
91
92	enum {
93	FLAG_CANCELLED = 0x01,
94	};
95
96	typedef aio_cb *aio_req;	251	typedef eio_req *aio_req;
97	typedef aio_cb *aio_req_ornot;	252	typedef eio_req *aio_req_ornot;
98		253
99	enum {	254	static SV *on_next_submit;
100	PRI_MIN = -4,	255	static int next_pri = EIO_PRI_DEFAULT;
101	PRI_MAX = 4,
102
103	DEFAULT_PRI = 0,
104	PRI_BIAS = -PRI_MIN,
105	};
106
107	static int next_pri = DEFAULT_PRI + PRI_BIAS;
108
109	static int started, wanted;
110	static volatile int nreqs;
111	static int max_outstanding = 1<<30;	256	static int max_outstanding;
112	static int respipe [2];
113		257
114	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	258	static s_epipe respipe;
115	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
116	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
117		259
118	static volatile aio_req reqs, reqe; /* queue start, queue end */	260	static void req_destroy (aio_req req);
119	static volatile aio_req ress, rese; /* queue start, queue end */
120
121	static void req_invoke (aio_req req);	261	static void req_cancel (aio_req req);
122	static void req_free (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	}
123		274
124	/* must be called at most once */	275	/* must be called at most once */
125	static SV *req_sv (aio_req req, const char *klass)	276	static SV *req_sv (aio_req req, HV *stash)
126	{	277	{
127	if (!req->self)	278	if (!req->self)
128	{	279	{
129	req->self = (SV *)newHV ();	280	req->self = (SV *)newHV ();
130	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	281	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
131	}	282	}
132		283
133	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	284	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
134	}	285	}
135		286
136	static aio_req SvAIO_REQ (SV *sv)	287	static aio_req SvAIO_REQ (SV *sv)
137	{	288	{
138	MAGIC *mg;	289	MAGIC *mg;
139		290
140	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	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")))
141	croak ("object of class " AIO_REQ_KLASS " expected");	295	croak ("object of class IO::AIO::REQ expected");
142		296
143	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	297	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
144		298
145	return mg ? (aio_req)mg->mg_ptr : 0;	299	return mg ? (aio_req)mg->mg_ptr : 0;
146	}	300	}
147		301
148	static void aio_grp_feed (aio_req grp)	302	static void aio_grp_feed (aio_req grp)
149	{	303	{
150	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	304	if (grp->sv2 && SvOK (grp->sv2))
151	{	305	{
152	int old_len = grp->length;	306	dSP;
153		307
154	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))
155	{	355	{
156	dSP;	356	sv_result = sv_result_cache; sv_result_cache = 0;
157		357	SvIV_set (sv_result, req->result);
158	ENTER;
159	SAVETMPS;
160	PUSHMARK (SP);
161	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
162	PUTBACK;
163	call_sv (grp->fh2, G_VOID | G_EVAL);
164	SPAGAIN;
165	FREETMPS;
166	LEAVE;
167	}	358	}
168		359	else
169	/* stop if no progress has been made */
170	if (old_len == grp->length)
171	{	360	{
172	SvREFCNT_dec (grp->fh2);	361	sv_result = newSViv (req->result);
173	grp->fh2 = 0;	362	SvREADONLY_on (sv_result);
174	break;
175	}	363	}
		364
		365	switch (req->type)
		366	{
		367	case EIO_READDIR:
		368	{
		369	SV *rv = &PL_sv_undef;
		370
		371	if (req->result >= 0)
		372	{
		373	int i;
		374	char *names = (char *)req->ptr2;
		375	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		376	AV *av = newAV ();
		377
		378	av_extend (av, req->result - 1);
		379
		380	for (i = 0; i < req->result; ++i)
		381	{
		382	if (req->int1 & EIO_READDIR_DENTS)
		383	{
		384	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		385
		386	if (req->int1 & EIO_READDIR_CUSTOM2)
		387	{
		388	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		389	AV *avent = newAV ();
		390
		391	av_extend (avent, 2);
		392
		393	if (!sv_type [ent->type])
		394	{
		395	sv_type [ent->type] = newSViv (ent->type);
		396	SvREADONLY_on (sv_type [ent->type]);
		397	}
		398
		399	av_store (avent, 0, namesv);
		400	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		401	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		402
		403	av_store (av, i, newRV_noinc ((SV *)avent));
		404	}
		405	else
		406	av_store (av, i, namesv);
		407
		408	++ent;
		409	}
		410	else
		411	{
		412	SV *name = newSVpv (names, 0);
		413	av_store (av, i, name);
		414	names += SvCUR (name) + 1;
		415	}
		416	}
		417
		418	rv = sv_2mortal (newRV_noinc ((SV *)av));
		419	}
		420
		421	PUSHs (rv);
		422
		423	if (req->int1 & EIO_READDIR_CUSTOM1)
		424	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		425	}
		426	break;
		427
		428	case EIO_OPEN:
		429	{
		430	/* convert fd to fh */
		431	SV *fh = &PL_sv_undef;
		432
		433	if (req->result >= 0)
		434	{
		435	GV *gv = (GV *)sv_newmortal ();
		436	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		437	char sym [64];
		438	int symlen;
		439
		440	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		441	gv_init (gv, aio_stash, sym, symlen, 0);
		442
		443	symlen = snprintf (
		444	sym,
		445	sizeof (sym),
		446	"%s&=%d",
		447	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		448	(int)req->result
		449	);
		450
		451	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		452	fh = (SV *)gv;
		453	}
		454
		455	PUSHs (fh);
		456	}
		457	break;
		458
		459	case EIO_STATVFS:
		460	case EIO_FSTATVFS:
		461	{
		462	SV *rv = &PL_sv_undef;
		463
		464	if (req->result >= 0)
		465	{
		466	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		467	HV *hv = newHV ();
		468
		469	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		470
		471	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		472	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		473	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		474	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		475	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		476	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		477	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		478	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		479	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		480	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		481	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		482	}
		483
		484	PUSHs (rv);
		485	}
		486
		487	break;
		488
		489	case EIO_GROUP:
		490	req->int1 = 2; /* mark group as finished */
		491
		492	if (req->sv1)
		493	{
		494	int i;
		495	AV *av = (AV *)req->sv1;
		496
		497	EXTEND (SP, AvFILL (av) + 1);
		498	for (i = 0; i <= AvFILL (av); ++i)
		499	PUSHs (*av_fetch (av, i, 0));
		500	}
		501	break;
		502
		503	case EIO_NOP:
		504	case EIO_BUSY:
		505	break;
		506
		507	case EIO_READLINK:
		508	if (req->result > 0)
		509	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		510	break;
		511
		512	case EIO_STAT:
		513	case EIO_LSTAT:
		514	case EIO_FSTAT:
		515	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		516	PL_laststatval = req->result;
		517	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		518	PUSHs (sv_result);
		519	break;
		520
		521	case EIO_READ:
		522	{
		523	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		524	*SvEND (req->sv2) = 0;
		525	SvPOK_only (req->sv2);
		526	SvSETMAGIC (req->sv2);
		527	PUSHs (sv_result);
		528	}
		529	break;
		530
		531	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		532	if (req->result > 0)
		533	SvIV_set (sv_result, 0);
		534	/* FALLTHROUGH */
		535
		536	default:
		537	PUSHs (sv_result);
		538	break;
		539	}
		540
		541	errno = req->errorno;
		542
		543	PUTBACK;
		544	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		545	SPAGAIN;
		546
		547	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		548	SvREFCNT_dec (sv_result);
		549	else
		550	sv_result_cache = sv_result;
		551
		552	FREETMPS;
		553	LEAVE;
		554
		555	PUTBACK;
176	}	556	}
177	}
178		557
179	static void aio_grp_dec (aio_req grp)	558	return !!SvTRUE (ERRSV);
180	{
181	--grp->length;
182
183	/* call feeder, if applicable */
184	aio_grp_feed (grp);
185
186	/* finish, if done */
187	if (!grp->length && grp->fd)
188	{
189	req_invoke (grp);
190	req_free (grp);
191	}
192	}	559	}
193		560
194	static void poll_wait ()
195	{
196	while (nreqs)
197	{
198	aio_req req;
199	pthread_mutex_lock (&reslock);
200	req = ress;
201	pthread_mutex_unlock (&reslock);
202
203	if (req)
204	return;
205
206	fd_set rfd;
207	FD_ZERO(&rfd);
208	FD_SET(respipe [0], &rfd);
209
210	select (respipe [0] + 1, &rfd, 0, 0, 0);
211	}
212	}
213
214	static void req_invoke (aio_req req)
215	{
216	dSP;
217	int errorno = errno;
218
219	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
220	return;
221
222	errno = req->errorno;
223
224	ENTER;
225	SAVETMPS;
226	PUSHMARK (SP);
227	EXTEND (SP, 1);
228
229	switch (req->type)
230	{
231	case REQ_READDIR:
232	{
233	SV *rv = &PL_sv_undef;
234
235	if (req->result >= 0)
236	{
237	char *buf = req->data2ptr;
238	AV *av = newAV ();
239
240	while (req->result)
241	{
242	SV *sv = newSVpv (buf, 0);
243
244	av_push (av, sv);
245	buf += SvCUR (sv) + 1;
246	req->result--;
247	}
248
249	rv = sv_2mortal (newRV_noinc ((SV *)av));
250	}
251
252	PUSHs (rv);
253	}
254	break;
255
256	case REQ_OPEN:
257	{
258	/* convert fd to fh */
259	SV *fh;
260
261	PUSHs (sv_2mortal (newSViv (req->result)));
262	PUTBACK;
263	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
264	SPAGAIN;
265
266	fh = SvREFCNT_inc (POPs);
267
268	PUSHMARK (SP);
269	XPUSHs (sv_2mortal (fh));
270	}
271	break;
272
273	case REQ_GROUP:
274	req->fd = 2; /* mark group as finished */
275
276	if (req->data)
277	{
278	int i;
279	AV *av = (AV *)req->data;
280
281	EXTEND (SP, AvFILL (av) + 1);
282	for (i = 0; i <= AvFILL (av); ++i)
283	PUSHs (*av_fetch (av, i, 0));
284	}
285	break;
286
287	case REQ_NOP:
288	case REQ_SLEEP:
289	break;
290
291	default:
292	PUSHs (sv_2mortal (newSViv (req->result)));
293	break;
294	}
295
296
297	PUTBACK;
298	call_sv (req->callback, G_VOID | G_EVAL);
299	SPAGAIN;
300
301	FREETMPS;
302	LEAVE;
303
304	errno = errorno;
305
306	if (SvTRUE (ERRSV))
307	{
308	req_free (req);
309	croak (0);
310	}
311	}
312
313	static void req_free (aio_req req)	561	static void req_destroy (aio_req req)
314	{	562	{
315	if (req->grp)
316	{
317	aio_req grp = req->grp;
318
319	/* unlink request */
320	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
321	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
322
323	if (grp->grp_first == req)
324	grp->grp_first = req->grp_next;
325
326	aio_grp_dec (grp);
327	}
328
329	if (req->self)	563	if (req->self)
330	{	564	{
331	sv_unmagic (req->self, PERL_MAGIC_ext);	565	sv_unmagic (req->self, PERL_MAGIC_ext);
332	SvREFCNT_dec (req->self);	566	SvREFCNT_dec (req->self);
333	}	567	}
334		568
335	SvREFCNT_dec (req->data);
336	SvREFCNT_dec (req->fh);	569	SvREFCNT_dec (req->sv1);
337	SvREFCNT_dec (req->fh2);	570	SvREFCNT_dec (req->sv2);
338	SvREFCNT_dec (req->callback);	571	SvREFCNT_dec (req->callback);
339	Safefree (req->statdata);
340
341	if (req->type == REQ_READDIR && req->result >= 0)
342	free (req->data2ptr);
343		572
344	Safefree (req);	573	Safefree (req);
345	}	574	}
346		575
347	static void req_cancel (aio_req req)	576	static void req_cancel_subs (aio_req grp)
348	{	577	{
349	req->flags |= FLAG_CANCELLED;	578	aio_req sub;
350		579
351	if (req->type == REQ_GROUP)	580	if (grp->type != EIO_GROUP)
		581	return;
		582
		583	SvREFCNT_dec (grp->sv2);
		584	grp->sv2 = 0;
		585
		586	eio_grp_cancel (grp);
		587	}
		588
		589	static void
		590	create_respipe (void)
		591	{
		592	if (s_epipe_renew (&respipe))
		593	croak ("IO::AIO: unable to initialize result pipe");
		594	}
		595
		596	static void poll_wait (void)
		597	{
		598	while (eio_nreqs ())
352	{	599	{
353	aio_req sub;	600	int size;
354		601
355	for (sub = req->grp_first; sub; sub = sub->grp_next)	602	X_LOCK (reslock);
356	req_cancel (sub);	603	size = res_queue.size;
		604	X_UNLOCK (reslock);
		605
		606	if (size)
		607	return;
		608
		609	etp_maybe_start_thread ();
		610
		611	s_epipe_wait (&respipe);
357	}	612	}
358	}	613	}
359		614
360	static int poll_cb ()	615	static int poll_cb (void)
361	{	616	{
362	dSP;
363	int count = 0;
364	int do_croak = 0;
365	aio_req req;
366
367	for (;;)	617	for (;;)
368	{	618	{
369	pthread_mutex_lock (&reslock);	619	int res = eio_poll ();
370	req = ress;
371		620
372	if (req)	621	if (res > 0)
373	{
374	ress = req->next;
375
376	if (!ress)
377	{
378	/* read any signals sent by the worker threads */
379	char buf [32];
380	while (read (respipe [0], buf, 32) == 32)
381	;
382
383	rese = 0;
384	}
385	}
386
387	pthread_mutex_unlock (&reslock);
388
389	if (!req)
390	break;	622	croak (0);
391		623
392	--nreqs;	624	if (!max_outstanding || max_outstanding > eio_nreqs ())
		625	return res;
393		626
394	if (req->type == REQ_QUIT)	627	poll_wait ();
395	started--;
396	else if (req->type == REQ_GROUP && req->length)
397	{
398	req->fd = 1; /* mark request as delayed */
399	continue;
400	}
401	else
402	{
403	if (req->type == REQ_READ)
404	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
405
406	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
407	SvREADONLY_off (req->data);
408
409	if (req->statdata)
410	{
411	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
412	PL_laststatval = req->result;
413	PL_statcache = *(req->statdata);
414	}
415
416	req_invoke (req);
417
418	count++;
419	}
420
421	req_free (req);
422	}	628	}
423
424	return count;
425	}	629	}
426		630
427	static void *aio_proc(void *arg);
428
429	static void start_thread (void)	631	static void atfork_child (void)
430	{	632	{
431	sigset_t fullsigset, oldsigset;	633	create_respipe ();
432	pthread_t tid;
433	pthread_attr_t attr;
434
435	pthread_attr_init (&attr);
436	pthread_attr_setstacksize (&attr, STACKSIZE);
437	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
438
439	sigfillset (&fullsigset);
440	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
441
442	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
443	started++;
444
445	sigprocmask (SIG_SETMASK, &oldsigset, 0);
446	}
447
448	static void req_send (aio_req req)
449	{
450	while (started < wanted && nreqs >= started)
451	start_thread ();
452
453	++nreqs;
454
455	pthread_mutex_lock (&reqlock);
456
457	req->next = 0;
458
459	if (reqe)
460	{
461	reqe->next = req;
462	reqe = req;
463	}
464	else
465	reqe = reqs = req;
466
467	pthread_cond_signal (&reqwait);
468	pthread_mutex_unlock (&reqlock);
469
470	if (nreqs > max_outstanding)
471	for (;;)
472	{
473	poll_cb ();
474
475	if (nreqs <= max_outstanding)
476	break;
477
478	poll_wait ();
479	}
480	}
481
482	static void end_thread (void)
483	{
484	aio_req req;
485	Newz (0, req, 1, aio_cb);
486	req->type = REQ_QUIT;
487
488	req_send (req);
489	}
490
491	static void min_parallel (int nthreads)
492	{
493	if (wanted < nthreads)
494	wanted = nthreads;
495	}
496
497	static void max_parallel (int nthreads)
498	{
499	int cur = started;
500
501	if (wanted > nthreads)
502	wanted = nthreads;
503
504	while (cur > wanted)
505	{
506	end_thread ();
507	cur--;
508	}
509
510	while (started > wanted)
511	{
512	poll_wait ();
513	poll_cb ();
514	}
515	}
516
517	static void create_pipe ()
518	{
519	if (pipe (respipe))
520	croak ("unable to initialize result pipe");
521
522	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
523	croak ("cannot set result pipe to nonblocking mode");
524
525	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
526	croak ("cannot set result pipe to nonblocking mode");
527	}	634	}
528		635
529	/*****************************************************************************/	636	/*****************************************************************************/
530	/* work around various missing functions */
531		637
532	#if !HAVE_PREADWRITE	638	#if !_POSIX_MAPPED_FILES
533	# define pread aio_pread	639	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
534	# define pwrite aio_pwrite	640	# define munmap(addr,length) (errno = ENOSYS, -1)
535		641	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
536	/*	642	# define PROT_NONE 0
537	* make our pread/pwrite safe against themselves, but not against	643	# define PROT_WRITE 0
538	* normal read/write by using a mutex. slows down execution a lot,	644	# define MAP_PRIVATE 0
539	* but that's your problem, not mine.	645	# define MAP_SHARED 0
540	*/	646	# define MAP_FIXED 0
541	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
542
543	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
544	{
545	ssize_t res;
546	off_t ooffset;
547
548	pthread_mutex_lock (&preadwritelock);
549	ooffset = lseek (fd, 0, SEEK_CUR);
550	lseek (fd, offset, SEEK_SET);
551	res = read (fd, buf, count);
552	lseek (fd, ooffset, SEEK_SET);
553	pthread_mutex_unlock (&preadwritelock);
554
555	return res;
556	}
557
558	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
559	{
560	ssize_t res;
561	off_t ooffset;
562
563	pthread_mutex_lock (&preadwritelock);
564	ooffset = lseek (fd, 0, SEEK_CUR);
565	lseek (fd, offset, SEEK_SET);
566	res = write (fd, buf, count);
567	lseek (fd, offset, SEEK_SET);
568	pthread_mutex_unlock (&preadwritelock);
569
570	return res;
571	}
572	#endif
573
574	#if !HAVE_FDATASYNC
575	# define fdatasync fsync
576	#endif
577
578	#if !HAVE_READAHEAD
579	# define readahead aio_readahead
580
581	static ssize_t readahead (int fd, off_t offset, size_t count)
582	{
583	char readahead_buf[4096];
584
585	while (count > 0)
586	{
587	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
588
589	pread (fd, readahead_buf, len, offset);
590	offset += len;
591	count -= len;
592	}
593
594	errno = 0;
595	}
596	#endif
597
598	#if !HAVE_READDIR_R
599	# define readdir_r aio_readdir_r
600
601	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
602
603	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
604	{
605	struct dirent *e;
606	int errorno;
607
608	pthread_mutex_lock (&readdirlock);
609
610	e = readdir (dirp);
611	errorno = errno;
612
613	if (e)
614	{
615	*res = ent;
616	strcpy (ent->d_name, e->d_name);
617	}
618	else
619	*res = 0;
620
621	pthread_mutex_unlock (&readdirlock);
622
623	errno = errorno;
624	return e ? 0 : -1;
625	}
626	#endif
627
628	/* sendfile always needs emulation */
629	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
630	{
631	ssize_t res;
632
633	if (!count)
634	return 0;
635
636	#if HAVE_SENDFILE
637	# if __linux
638	res = sendfile (ofd, ifd, &offset, count);
639
640	# elif __freebsd
641	/*
642	* Of course, the freebsd sendfile is a dire hack with no thoughts
643	* wasted on making it similar to other I/O functions.
644	*/
645	{
646	off_t sbytes;
647	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
648
649	if (res < 0 && sbytes)
650	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
651	res = sbytes;
652	}
653
654	# elif __hpux
655	res = sendfile (ofd, ifd, offset, count, 0, 0);
656
657	# elif __solaris
658	{
659	struct sendfilevec vec;
660	size_t sbytes;
661
662	vec.sfv_fd = ifd;
663	vec.sfv_flag = 0;
664	vec.sfv_off = offset;
665	vec.sfv_len = count;
666
667	res = sendfilev (ofd, &vec, 1, &sbytes);
668
669	if (res < 0 && sbytes)
670	res = sbytes;
671	}
672
673	# endif	647	#endif
674	#else
675	res = -1;
676	errno = ENOSYS;
677	#endif
678		648
679	if (res < 0	649	#define MMAP_MAGIC PERL_MAGIC_ext
680	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
681	#if __solaris
682	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
683	#endif
684	)
685	)
686	{
687	/* emulate sendfile. this is a major pain in the ass */
688	char buf[4096];
689	res = 0;
690		650
691	while (count)	651	static int
692	{	652	mmap_free (pTHX_ SV *sv, MAGIC *mg)
693	ssize_t cnt;
694
695	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
696
697	if (cnt <= 0)
698	{
699	if (cnt && !res) res = -1;
700	break;
701	}
702
703	cnt = write (ofd, buf, cnt);
704
705	if (cnt <= 0)
706	{
707	if (cnt && !res) res = -1;
708	break;
709	}
710
711	offset += cnt;
712	res += cnt;
713	count -= cnt;
714	}
715	}
716
717	return res;
718	}
719
720	/* read a full directory */
721	static int scandir_ (const char *path, void **namesp)
722	{	653	{
723	DIR *dirp = opendir (path);	654	int old_errno = errno;
724	union	655	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
725	{
726	struct dirent d;
727	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
728	} u;
729	struct dirent *entp;
730	char *name, *names;
731	int memlen = 4096;
732	int memofs = 0;
733	int res = 0;
734	int errorno;
735
736	if (!dirp)
737	return -1;
738
739	names = malloc (memlen);
740
741	for (;;)
742	{
743	errno = 0, readdir_r (dirp, &u.d, &entp);
744
745	if (!entp)
746	break;
747
748	name = entp->d_name;
749
750	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
751	{
752	int len = strlen (name) + 1;
753
754	res++;
755
756	while (memofs + len > memlen)
757	{
758	memlen *= 2;
759	names = realloc (names, memlen);
760	if (!names)
761	break;
762	}
763
764	memcpy (names + memofs, name, len);
765	memofs += len;
766	}
767	}
768
769	errorno = errno;	656	errno = old_errno;
770	closedir (dirp);
771		657
772	if (errorno)	658	mg->mg_obj = 0; /* just in case */
773	{
774	free (names);
775	errno = errorno;
776	res = -1;
777	}
778		659
779	*namesp = (void *)names;	660	SvREADONLY_off (sv);
		661
		662	if (SvPVX (sv) != mg->mg_ptr)
		663	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		664
		665	SvCUR_set (sv, 0);
		666	SvPVX (sv) = 0;
		667	SvOK_off (sv);
		668
780	return res;	669	return 0;
781	}	670	}
		671
		672	static MGVTBL mmap_vtbl = {
		673	0, 0, 0, 0, mmap_free
		674	};
782		675
783	/*****************************************************************************/	676	/*****************************************************************************/
784		677
785	static void *aio_proc (void *thr_arg)	678	static SV *
		679	get_cb (SV *cb_sv)
786	{	680	{
787	aio_req req;	681	SvGETMAGIC (cb_sv);
788	int type;	682	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
789
790	do
791	{
792	pthread_mutex_lock (&reqlock);
793
794	for (;;)
795	{
796	req = reqs;
797
798	if (reqs)
799	{
800	reqs = reqs->next;
801	if (!reqs) reqe = 0;
802	}
803
804	if (req)
805	break;
806
807	pthread_cond_wait (&reqwait, &reqlock);
808	}
809
810	pthread_mutex_unlock (&reqlock);
811
812	errno = 0; /* strictly unnecessary */
813	type = req->type; /* remember type for QUIT check */
814
815	if (!(req->flags & FLAG_CANCELLED))
816	switch (type)
817	{
818	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
819	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
820
821	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
822	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
823
824	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
825	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
826	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
827
828	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
829	case REQ_CLOSE: req->result = close (req->fd); break;
830	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
831	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
832	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
833	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
834	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
835
836	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
837	case REQ_FSYNC: req->result = fsync (req->fd); break;
838	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
839
840	case REQ_SLEEP:
841	{
842	struct timeval tv;
843
844	tv.tv_sec = req->fd;
845	tv.tv_usec = req->fd2;
846
847	req->result = select (0, 0, 0, 0, &tv);
848	}
849
850	case REQ_GROUP:
851	case REQ_NOP:
852	case REQ_QUIT:
853	break;
854
855	default:
856	req->result = ENOSYS;
857	break;
858	}
859
860	req->errorno = errno;
861
862	pthread_mutex_lock (&reslock);
863
864	req->next = 0;
865
866	if (rese)
867	{
868	rese->next = req;
869	rese = req;
870	}
871	else
872	{
873	rese = ress = req;
874
875	/* write a dummy byte to the pipe so fh becomes ready */
876	write (respipe [1], &respipe, 1);
877	}
878
879	pthread_mutex_unlock (&reslock);
880	}
881	while (type != REQ_QUIT);
882
883	return 0;
884	}
885
886	/*****************************************************************************/
887
888	static void atfork_prepare (void)
889	{
890	pthread_mutex_lock (&reqlock);
891	pthread_mutex_lock (&reslock);
892	#if !HAVE_PREADWRITE
893	pthread_mutex_lock (&preadwritelock);
894	#endif
895	#if !HAVE_READDIR_R
896	pthread_mutex_lock (&readdirlock);
897	#endif
898	}
899
900	static void atfork_parent (void)
901	{
902	#if !HAVE_READDIR_R
903	pthread_mutex_unlock (&readdirlock);
904	#endif
905	#if !HAVE_PREADWRITE
906	pthread_mutex_unlock (&preadwritelock);
907	#endif
908	pthread_mutex_unlock (&reslock);
909	pthread_mutex_unlock (&reqlock);
910	}
911
912	static void atfork_child (void)
913	{
914	aio_req prv;
915
916	started = 0;
917
918	while (reqs)
919	{
920	prv = reqs;
921	reqs = prv->next;
922	req_free (prv);
923	}
924
925	reqs = reqe = 0;
926
927	while (ress)
928	{
929	prv = ress;
930	ress = prv->next;
931	req_free (prv);
932	}
933
934	ress = rese = 0;
935
936	close (respipe [0]);
937	close (respipe [1]);
938	create_pipe ();
939
940	atfork_parent ();
941	}	683	}
942		684
943	#define dREQ \	685	#define dREQ \
		686	SV *cb_cv; \
944	aio_req req; \	687	aio_req req; \
945	int req_pri = next_pri; \	688	int req_pri = next_pri; \
946	next_pri = DEFAULT_PRI + PRI_BIAS; \	689	next_pri = EIO_PRI_DEFAULT; \
947	\	690	\
948	if (SvOK (callback) && !SvROK (callback)) \	691	cb_cv = get_cb (callback); \
949	croak ("callback must be undef or of reference type"); \
950	\	692	\
951	Newz (0, req, 1, aio_cb); \	693	Newz (0, req, 1, eio_req); \
952	if (!req) \	694	if (!req) \
953	croak ("out of memory during aio_req allocation"); \	695	croak ("out of memory during eio_req allocation"); \
954	\	696	\
955	req->callback = newSVsv (callback); \	697	req->callback = SvREFCNT_inc (cb_cv); \
956	req->pri = req_pri	698	req->pri = req_pri
957		699
958	#define REQ_SEND \	700	#define REQ_SEND \
		701	PUTBACK; \
959	req_send (req); \	702	req_submit (req); \
		703	SPAGAIN; \
960	\	704	\
961	if (GIMME_V != G_VOID) \	705	if (GIMME_V != G_VOID) \
962	XPUSHs (req_sv (req, AIO_REQ_KLASS));	706	XPUSHs (req_sv (req, aio_req_stash));
963		707
964	MODULE = IO::AIO PACKAGE = IO::AIO	708	MODULE = IO::AIO PACKAGE = IO::AIO
965		709
966	PROTOTYPES: ENABLE	710	PROTOTYPES: ENABLE
967		711
968	BOOT:	712	BOOT:
969	{	713	{
		714	static const struct {
		715	const char *name;
		716	IV iv;
		717	} *civ, const_iv[] = {
		718	# define const_niv(name, value) { # name, (IV) value },
		719	# define const_iv(name) { # name, (IV) name },
		720	# define const_eio(name) { # name, (IV) EIO_ ## name },
		721	const_iv (EXDEV)
		722	const_iv (ENOSYS)
		723	const_iv (O_RDONLY)
		724	const_iv (O_WRONLY)
		725	const_iv (O_RDWR)
		726	const_iv (O_CREAT)
		727	const_iv (O_TRUNC)
		728	const_iv (O_EXCL)
		729	const_iv (O_APPEND)
		730	#ifndef _WIN32
		731	const_iv (S_IFIFO)
		732	#endif
		733	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		734	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		735	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		736	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		737	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		738	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		739
		740	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		741	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		742	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		743	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		744	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		745
		746	const_iv (ST_RDONLY)
		747	const_iv (ST_NOSUID)
		748	const_iv (ST_NODEV)
		749	const_iv (ST_NOEXEC)
		750	const_iv (ST_SYNCHRONOUS)
		751	const_iv (ST_MANDLOCK)
		752	const_iv (ST_WRITE)
		753	const_iv (ST_APPEND)
		754	const_iv (ST_IMMUTABLE)
		755	const_iv (ST_NOATIME)
		756	const_iv (ST_NODIRATIME)
		757	const_iv (ST_RELATIME)
		758
		759	const_iv (PROT_NONE)
		760	const_iv (PROT_EXEC)
		761	const_iv (PROT_READ)
		762	const_iv (PROT_WRITE)
		763
		764	/*const_iv (MAP_FIXED)*/
		765	const_iv (MAP_PRIVATE)
		766	const_iv (MAP_SHARED)
		767	const_iv (MAP_ANONYMOUS)
		768
		769	/* linuxish */
		770	const_iv (MAP_HUGETLB)
		771	const_iv (MAP_LOCKED)
		772	const_iv (MAP_NORESERVE)
		773	const_iv (MAP_POPULATE)
		774	const_iv (MAP_NONBLOCK)
		775
		776	const_eio (MCL_FUTURE)
		777	const_eio (MCL_CURRENT)
		778
		779	const_eio (MS_ASYNC)
		780	const_eio (MS_INVALIDATE)
		781	const_eio (MS_SYNC)
		782
		783	const_eio (MT_MODIFY)
		784
		785	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		786	const_eio (SYNC_FILE_RANGE_WRITE)
		787	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		788
		789	const_eio (READDIR_DENTS)
		790	const_eio (READDIR_DIRS_FIRST)
		791	const_eio (READDIR_STAT_ORDER)
		792	const_eio (READDIR_FOUND_UNKNOWN)
		793
		794	const_eio (DT_UNKNOWN)
		795	const_eio (DT_FIFO)
		796	const_eio (DT_CHR)
		797	const_eio (DT_DIR)
		798	const_eio (DT_BLK)
		799	const_eio (DT_REG)
		800	const_eio (DT_LNK)
		801	const_eio (DT_SOCK)
		802	const_eio (DT_WHT)
		803	};
		804
970	HV *stash = gv_stashpv ("IO::AIO", 1);	805	aio_stash = gv_stashpv ("IO::AIO" , 1);
971	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	806	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
972	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	807	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
973	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
974		808
		809	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		810	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		811
		812	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		813
975	create_pipe ();	814	create_respipe ();
976	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
977	}
978		815
		816	if (eio_init (want_poll, done_poll) < 0)
		817	croak ("IO::AIO: unable to initialise eio library");
		818
		819	/* atfork child called in fifo order, so before eio's handler */
		820	X_THREAD_ATFORK (0, 0, atfork_child);
		821	}
		822
979	void	823	void
980	min_parallel (nthreads)	824	max_poll_reqs (int nreqs)
981	int nthreads
982	PROTOTYPE: $	825	PROTOTYPE: $
		826	CODE:
		827	eio_set_max_poll_reqs (nreqs);
983		828
984	void	829	void
985	max_parallel (nthreads)	830	max_poll_time (double nseconds)
986	int nthreads
987	PROTOTYPE: $	831	PROTOTYPE: $
988
989	int
990	max_outstanding (nreqs)
991	int nreqs
992	PROTOTYPE: $
993	CODE:	832	CODE:
994	RETVAL = max_outstanding;	833	eio_set_max_poll_time (nseconds);
		834
		835	void
		836	min_parallel (int nthreads)
		837	PROTOTYPE: $
		838	CODE:
		839	eio_set_min_parallel (nthreads);
		840
		841	void
		842	max_parallel (int nthreads)
		843	PROTOTYPE: $
		844	CODE:
		845	eio_set_max_parallel (nthreads);
		846
		847	void
		848	max_idle (int nthreads)
		849	PROTOTYPE: $
		850	CODE:
		851	eio_set_max_idle (nthreads);
		852
		853	void
		854	max_outstanding (int maxreqs)
		855	PROTOTYPE: $
		856	CODE:
995	max_outstanding = nreqs;	857	max_outstanding = maxreqs;
996		858
997	void	859	void
998	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	860	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
999	SV * pathname
1000	int flags
1001	int mode
1002	SV * callback
1003	PROTOTYPE: $$$;$
1004	PPCODE:	861	PPCODE:
1005	{	862	{
1006	dREQ;	863	dREQ;
1007		864
1008	req->type = REQ_OPEN;	865	req->type = EIO_OPEN;
1009	req->data = newSVsv (pathname);	866	req->sv1 = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	867	req->ptr1 = SvPVbyte_nolen (req->sv1);
1011	req->fd = flags;	868	req->int1 = flags;
1012	req->mode = mode;	869	req->int2 = mode;
1013		870
1014	REQ_SEND;	871	REQ_SEND;
1015	}	872	}
1016		873
1017	void	874	void
1018	aio_close (fh,callback=&PL_sv_undef)	875	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1019	SV * fh
1020	SV * callback
1021	PROTOTYPE: $;$
1022	ALIAS:	876	ALIAS:
1023	aio_close = REQ_CLOSE
1024	aio_fsync = REQ_FSYNC	877	aio_fsync = EIO_FSYNC
1025	aio_fdatasync = REQ_FDATASYNC	878	aio_fdatasync = EIO_FDATASYNC
1026	PPCODE:	879	PPCODE:
1027	{	880	{
		881	int fd = s_fileno_croak (fh, 0);
1028	dREQ;	882	dREQ;
1029		883
1030	req->type = ix;	884	req->type = ix;
1031	req->fh = newSVsv (fh);	885	req->sv1 = newSVsv (fh);
1032	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	886	req->int1 = fd;
1033		887
1034	REQ_SEND (req);	888	REQ_SEND (req);
1035	}	889	}
1036		890
1037	void	891	void
		892	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		893	PPCODE:
		894	{
		895	int fd = s_fileno_croak (fh, 0);
		896	dREQ;
		897
		898	req->type = EIO_SYNC_FILE_RANGE;
		899	req->sv1 = newSVsv (fh);
		900	req->int1 = fd;
		901	req->offs = offset;
		902	req->size = nbytes;
		903	req->int2 = flags;
		904
		905	REQ_SEND (req);
		906	}
		907
		908	void
		909	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		910	PPCODE:
		911	{
		912	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		913	int fd = s_fileno_croak (fh, 0);
		914	dREQ;
		915
		916	if (close_pipe < 0)
		917	{
		918	int pipefd [2];
		919
		920	if (pipe (pipefd) < 0
		921	|| close (pipefd [1]) < 0
		922	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		923	abort (); /*D*/
		924
		925	close_pipe = pipefd [0];
		926	}
		927
		928	req->type = EIO_DUP2;
		929	req->int1 = close_pipe;
		930	req->sv2 = newSVsv (fh);
		931	req->int2 = fd;
		932
		933	REQ_SEND (req);
		934	}
		935
		936	void
1038	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	937	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1039	SV * fh
1040	UV offset
1041	UV length
1042	SV * data
1043	UV dataoffset
1044	SV * callback
1045	ALIAS:	938	ALIAS:
1046	aio_read = REQ_READ	939	aio_read = EIO_READ
1047	aio_write = REQ_WRITE	940	aio_write = EIO_WRITE
1048	PROTOTYPE: $$$$$;$
1049	PPCODE:	941	PPCODE:
1050	{	942	{
1051	aio_req req;
1052	STRLEN svlen;	943	STRLEN svlen;
		944	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1053	char *svptr = SvPVbyte (data, svlen);	945	char *svptr = SvPVbyte (data, svlen);
1054		946	UV len = SvUV (length);
1055	SvUPGRADE (data, SVt_PV);
1056	SvPOK_on (data);
1057		947
1058	if (dataoffset < 0)	948	if (dataoffset < 0)
1059	dataoffset += svlen;	949	dataoffset += svlen;
1060		950
1061	if (dataoffset < 0 || dataoffset > svlen)	951	if (dataoffset < 0 || dataoffset > svlen)
1062	croak ("data offset outside of string");	952	croak ("dataoffset outside of data scalar");
1063		953
1064	if (ix == REQ_WRITE)	954	if (ix == EIO_WRITE)
1065	{	955	{
1066	/* write: check length and adjust. */	956	/* write: check length and adjust. */
1067	if (length < 0 || length + dataoffset > svlen)	957	if (!SvOK (length) || len + dataoffset > svlen)
1068	length = svlen - dataoffset;	958	len = svlen - dataoffset;
1069	}	959	}
1070	else	960	else
1071	{	961	{
1072	/* read: grow scalar as necessary */	962	/* read: check type and grow scalar as necessary */
		963	SvUPGRADE (data, SVt_PV);
1073	svptr = SvGROW (data, length + dataoffset);	964	svptr = SvGROW (data, len + dataoffset + 1);
1074	}	965	}
1075
1076	if (length < 0)
1077	croak ("length must not be negative");
1078		966
1079	{	967	{
1080	dREQ;	968	dREQ;
1081		969
1082	req->type = ix;	970	req->type = ix;
1083	req->fh = newSVsv (fh);	971	req->sv1 = newSVsv (fh);
1084	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	972	req->int1 = fd;
1085	: IoOFP (sv_2io (fh)));	973	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1086	req->offset = offset;	974	req->size = len;
1087	req->length = length;
1088	req->data = SvREFCNT_inc (data);	975	req->sv2 = SvREFCNT_inc (data);
1089	req->dataptr = (char *)svptr + dataoffset;	976	req->ptr2 = (char *)svptr + dataoffset;
		977	req->stroffset = dataoffset;
1090		978
1091	if (!SvREADONLY (data))	979	if (!SvREADONLY (data))
1092	{	980	{
1093	SvREADONLY_on (data);	981	SvREADONLY_on (data);
1094	req->data2ptr = (void *)data;	982	req->flags |= FLAG_SV2_RO_OFF;
1095	}	983	}
1096		984
1097	REQ_SEND;	985	REQ_SEND;
1098	}	986	}
1099	}	987	}
1100		988
1101	void	989	void
1102	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	990	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1103	SV * out_fh
1104	SV * in_fh
1105	UV in_offset
1106	UV length
1107	SV * callback
1108	PROTOTYPE: $$$$;$
1109	PPCODE:	991	PPCODE:
1110	{	992	{
		993	SV *data;
		994	dREQ;
		995
		996	req->type = EIO_READLINK;
		997	req->sv1 = newSVsv (path);
		998	req->ptr1 = SvPVbyte_nolen (req->sv1);
		999
		1000	REQ_SEND;
		1001	}
		1002
		1003	void
		1004	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1005	PPCODE:
		1006	{
		1007	int ifd = s_fileno_croak (in_fh , 0);
		1008	int ofd = s_fileno_croak (out_fh, 1);
1111	dREQ;	1009	dREQ;
1112		1010
1113	req->type = REQ_SENDFILE;	1011	req->type = EIO_SENDFILE;
1114	req->fh = newSVsv (out_fh);	1012	req->sv1 = newSVsv (out_fh);
1115	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1013	req->int1 = ofd;
1116	req->fh2 = newSVsv (in_fh);	1014	req->sv2 = newSVsv (in_fh);
1117	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1015	req->int2 = ifd;
1118	req->offset = in_offset;	1016	req->offs = in_offset;
1119	req->length = length;	1017	req->size = length;
1120		1018
1121	REQ_SEND;	1019	REQ_SEND;
1122	}	1020	}
1123		1021
1124	void	1022	void
1125	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1023	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1126	SV * fh
1127	UV offset
1128	IV length
1129	SV * callback
1130	PROTOTYPE: $$$;$
1131	PPCODE:	1024	PPCODE:
1132	{	1025	{
		1026	int fd = s_fileno_croak (fh, 0);
1133	dREQ;	1027	dREQ;
1134		1028
1135	req->type = REQ_READAHEAD;	1029	req->type = EIO_READAHEAD;
1136	req->fh = newSVsv (fh);	1030	req->sv1 = newSVsv (fh);
1137	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1031	req->int1 = fd;
1138	req->offset = offset;	1032	req->offs = offset;
1139	req->length = length;	1033	req->size = length;
1140		1034
1141	REQ_SEND;	1035	REQ_SEND;
1142	}	1036	}
1143		1037
1144	void	1038	void
1145	aio_stat (fh_or_path,callback=&PL_sv_undef)	1039	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1146	SV * fh_or_path
1147	SV * callback
1148	ALIAS:	1040	ALIAS:
1149	aio_stat = REQ_STAT	1041	aio_stat = EIO_STAT
1150	aio_lstat = REQ_LSTAT	1042	aio_lstat = EIO_LSTAT
		1043	aio_statvfs = EIO_STATVFS
1151	PPCODE:	1044	PPCODE:
1152	{	1045	{
1153	dREQ;	1046	dREQ;
1154		1047
1155	New (0, req->statdata, 1, Stat_t);	1048	req->sv1 = newSVsv (fh_or_path);
1156	if (!req->statdata)
1157	{
1158	req_free (req);
1159	croak ("out of memory during aio_req->statdata allocation");
1160	}
1161		1049
1162	if (SvPOK (fh_or_path))	1050	if (SvPOK (req->sv1))
1163	{	1051	{
1164	req->type = ix;	1052	req->type = ix;
1165	req->data = newSVsv (fh_or_path);
1166	req->dataptr = SvPVbyte_nolen (req->data);	1053	req->ptr1 = SvPVbyte_nolen (req->sv1);
1167	}	1054	}
1168	else	1055	else
1169	{	1056	{
1170	req->type = REQ_FSTAT;	1057	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1171	req->fh = newSVsv (fh_or_path);
1172	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1058	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1173	}	1059	}
1174		1060
1175	REQ_SEND;	1061	REQ_SEND;
1176	}	1062	}
1177		1063
1178	void	1064	void
		1065	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1066	PPCODE:
		1067	{
		1068	dREQ;
		1069
		1070	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1071	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1072	req->sv1 = newSVsv (fh_or_path);
		1073
		1074	if (SvPOK (req->sv1))
		1075	{
		1076	req->type = EIO_UTIME;
		1077	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1078	}
		1079	else
		1080	{
		1081	req->type = EIO_FUTIME;
		1082	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1083	}
		1084
		1085	REQ_SEND;
		1086	}
		1087
		1088	void
		1089	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1090	PPCODE:
		1091	{
		1092	dREQ;
		1093
		1094	req->sv1 = newSVsv (fh_or_path);
		1095	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1096
		1097	if (SvPOK (req->sv1))
		1098	{
		1099	req->type = EIO_TRUNCATE;
		1100	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1101	}
		1102	else
		1103	{
		1104	req->type = EIO_FTRUNCATE;
		1105	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1106	}
		1107
		1108	REQ_SEND;
		1109	}
		1110
		1111	void
		1112	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1113	ALIAS:
		1114	aio_chmod = EIO_CHMOD
		1115	aio_mkdir = EIO_MKDIR
		1116	PPCODE:
		1117	{
		1118	dREQ;
		1119
		1120	req->int2 = mode;
		1121	req->sv1 = newSVsv (fh_or_path);
		1122
		1123	if (SvPOK (req->sv1))
		1124	{
		1125	req->type = ix;
		1126	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1127	}
		1128	else
		1129	{
		1130	req->type = EIO_FCHMOD;
		1131	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1132	}
		1133
		1134	REQ_SEND;
		1135	}
		1136
		1137	void
		1138	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1139	PPCODE:
		1140	{
		1141	dREQ;
		1142
		1143	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1144	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1145	req->sv1 = newSVsv (fh_or_path);
		1146
		1147	if (SvPOK (req->sv1))
		1148	{
		1149	req->type = EIO_CHOWN;
		1150	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1151	}
		1152	else
		1153	{
		1154	req->type = EIO_FCHOWN;
		1155	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1156	}
		1157
		1158	REQ_SEND;
		1159	}
		1160
		1161	void
		1162	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1163	PPCODE:
		1164	{
		1165	dREQ;
		1166
		1167	req->type = EIO_READDIR;
		1168	req->sv1 = newSVsv (pathname);
		1169	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1170	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1171
		1172	if (flags & EIO_READDIR_DENTS)
		1173	req->int1 |= EIO_READDIR_CUSTOM2;
		1174
		1175	REQ_SEND;
		1176	}
		1177
		1178	void
1179	aio_unlink (pathname,callback=&PL_sv_undef)	1179	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1180	SV * pathname
1181	SV * callback
1182	ALIAS:	1180	ALIAS:
1183	aio_unlink = REQ_UNLINK	1181	aio_unlink = EIO_UNLINK
1184	aio_rmdir = REQ_RMDIR	1182	aio_rmdir = EIO_RMDIR
1185	aio_readdir = REQ_READDIR	1183	aio_readdir = EIO_READDIR
1186	PPCODE:	1184	PPCODE:
1187	{	1185	{
1188	dREQ;	1186	dREQ;
1189		1187
1190	req->type = ix;	1188	req->type = ix;
1191	req->data = newSVsv (pathname);	1189	req->sv1 = newSVsv (pathname);
1192	req->dataptr = SvPVbyte_nolen (req->data);	1190	req->ptr1 = SvPVbyte_nolen (req->sv1);
1193		1191
1194	REQ_SEND;	1192	REQ_SEND;
1195	}	1193	}
1196		1194
1197	void	1195	void
1198	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1196	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1199	SV * oldpath
1200	SV * newpath
1201	SV * callback
1202	ALIAS:	1197	ALIAS:
1203	aio_link = REQ_LINK	1198	aio_link = EIO_LINK
1204	aio_symlink = REQ_SYMLINK	1199	aio_symlink = EIO_SYMLINK
1205	aio_rename = REQ_RENAME	1200	aio_rename = EIO_RENAME
1206	PPCODE:	1201	PPCODE:
1207	{	1202	{
1208	dREQ;	1203	dREQ;
1209		1204
1210	req->type = ix;	1205	req->type = ix;
1211	req->fh = newSVsv (oldpath);	1206	req->sv1 = newSVsv (oldpath);
1212	req->data2ptr = SvPVbyte_nolen (req->fh);	1207	req->ptr1 = SvPVbyte_nolen (req->sv1);
1213	req->data = newSVsv (newpath);	1208	req->sv2 = newSVsv (newpath);
1214	req->dataptr = SvPVbyte_nolen (req->data);	1209	req->ptr2 = SvPVbyte_nolen (req->sv2);
1215		1210
1216	REQ_SEND;	1211	REQ_SEND;
1217	}	1212	}
1218		1213
1219	void	1214	void
1220	aio_sleep (delay,callback=&PL_sv_undef)	1215	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1221	double delay
1222	SV * callback
1223	PPCODE:	1216	PPCODE:
1224	{	1217	{
1225	dREQ;	1218	dREQ;
1226		1219
1227	req->type = REQ_SLEEP;	1220	req->type = EIO_MKNOD;
1228	req->fd = delay < 0. ? 0 : delay;	1221	req->sv1 = newSVsv (pathname);
1229	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1222	req->ptr1 = SvPVbyte_nolen (req->sv1);
1230		1223	req->int2 = (mode_t)mode;
		1224	req->offs = dev;
		1225
1231	REQ_SEND;	1226	REQ_SEND;
1232	}	1227	}
1233		1228
1234	void	1229	void
1235	aio_group (callback=&PL_sv_undef)	1230	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1236	SV * callback	1231	ALIAS:
1237	PROTOTYPE: ;$	1232	aio_mtouch = EIO_MTOUCH
		1233	aio_msync = EIO_MSYNC
1238	PPCODE:	1234	PPCODE:
1239	{	1235	{
		1236	STRLEN svlen;
		1237	char *svptr = SvPVbyte (data, svlen);
		1238	UV len = SvUV (length);
		1239
		1240	if (offset < 0)
		1241	offset += svlen;
		1242
		1243	if (offset < 0 || offset > svlen)
		1244	croak ("offset outside of scalar");
		1245
		1246	if (!SvOK (length) || len + offset > svlen)
		1247	len = svlen - offset;
		1248
		1249	{
		1250	dREQ;
		1251
		1252	req->type = ix;
		1253	req->sv2 = SvREFCNT_inc (data);
		1254	req->ptr2 = (char *)svptr + offset;
		1255	req->size = len;
		1256	req->int1 = flags;
		1257
		1258	REQ_SEND;
		1259	}
		1260	}
		1261
		1262	void
		1263	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1264	PPCODE:
		1265	{
		1266	STRLEN svlen;
		1267	char *svptr = SvPVbyte (data, svlen);
		1268	UV len = SvUV (length);
		1269
		1270	if (offset < 0)
		1271	offset += svlen;
		1272
		1273	if (offset < 0 || offset > svlen)
		1274	croak ("offset outside of scalar");
		1275
		1276	if (!SvOK (length) || len + offset > svlen)
		1277	len = svlen - offset;
		1278
		1279	{
		1280	dREQ;
		1281
		1282	req->type = EIO_MLOCK;
		1283	req->sv2 = SvREFCNT_inc (data);
		1284	req->ptr2 = (char *)svptr + offset;
		1285	req->size = len;
		1286
		1287	REQ_SEND;
		1288	}
		1289	}
		1290
		1291	void
		1292	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1293	PPCODE:
		1294	{
		1295	dREQ;
		1296
		1297	req->type = EIO_MLOCKALL;
		1298	req->int1 = flags;
		1299
		1300	REQ_SEND;
		1301	}
		1302
		1303	void
		1304	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1305	PPCODE:
		1306	{
1240	dREQ;	1307	dREQ;
1241		1308
		1309	req->type = EIO_BUSY;
		1310	req->nv1 = delay < 0. ? 0. : delay;
		1311
		1312	REQ_SEND;
		1313	}
		1314
		1315	void
		1316	aio_group (SV *callback=&PL_sv_undef)
		1317	PPCODE:
		1318	{
		1319	dREQ;
		1320
1242	req->type = REQ_GROUP;	1321	req->type = EIO_GROUP;
		1322
1243	req_send (req);	1323	req_submit (req);
1244
1245	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1324	XPUSHs (req_sv (req, aio_grp_stash));
1246	}	1325	}
1247		1326
1248	void	1327	void
1249	aio_nop (callback=&PL_sv_undef)	1328	aio_nop (SV *callback=&PL_sv_undef)
1250	SV * callback	1329	ALIAS:
		1330	aio_nop = EIO_NOP
		1331	aio_sync = EIO_SYNC
1251	PPCODE:	1332	PPCODE:
1252	{	1333	{
1253	dREQ;	1334	dREQ;
1254		1335
1255	req->type = REQ_NOP;	1336	req->type = ix;
1256		1337
1257	REQ_SEND;	1338	REQ_SEND;
1258	}	1339	}
1259		1340
1260	#if 0	1341	int
1261		1342	aioreq_pri (int pri = 0)
1262	void
1263	aio_pri (int pri = DEFAULT_PRI)
1264	CODE:	1343	CODE:
		1344	RETVAL = next_pri;
		1345	if (items > 0)
		1346	{
1265	if (pri < PRI_MIN) pri = PRI_MIN;	1347	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1266	if (pri > PRI_MAX) pri = PRI_MAX;	1348	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1267	next_pri = pri + PRI_BIAS;	1349	next_pri = pri;
		1350	}
		1351	OUTPUT:
		1352	RETVAL
1268		1353
1269	#endif	1354	void
		1355	aioreq_nice (int nice = 0)
		1356	CODE:
		1357	nice = next_pri - nice;
		1358	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1359	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1360	next_pri = nice;
1270		1361
1271	void	1362	void
1272	flush ()	1363	flush ()
1273	PROTOTYPE:
1274	CODE:	1364	CODE:
1275	while (nreqs)	1365	while (eio_nreqs ())
1276	{	1366	{
1277	poll_wait ();	1367	poll_wait ();
1278	poll_cb ();	1368	poll_cb ();
1279	}	1369	}
1280		1370
1281	void	1371	int
1282	poll()	1372	poll ()
1283	PROTOTYPE:
1284	CODE:	1373	CODE:
1285	if (nreqs)
1286	{
1287	poll_wait ();	1374	poll_wait ();
1288	poll_cb ();	1375	RETVAL = poll_cb ();
1289	}
1290
1291	int
1292	poll_fileno()
1293	PROTOTYPE:
1294	CODE:
1295	RETVAL = respipe [0];
1296	OUTPUT:	1376	OUTPUT:
1297	RETVAL	1377	RETVAL
1298		1378
1299	int	1379	int
		1380	poll_fileno ()
		1381	CODE:
		1382	RETVAL = s_epipe_fd (&respipe);
		1383	OUTPUT:
		1384	RETVAL
		1385
		1386	int
1300	poll_cb(...)	1387	poll_cb (...)
1301	PROTOTYPE:	1388	PROTOTYPE:
1302	CODE:	1389	CODE:
1303	RETVAL = poll_cb ();	1390	RETVAL = poll_cb ();
1304	OUTPUT:	1391	OUTPUT:
1305	RETVAL	1392	RETVAL
1306		1393
1307	void	1394	void
1308	poll_wait()	1395	poll_wait ()
1309	PROTOTYPE:
1310	CODE:	1396	CODE:
1311	if (nreqs)
1312	poll_wait ();	1397	poll_wait ();
1313		1398
1314	int	1399	int
1315	nreqs()	1400	nreqs ()
1316	PROTOTYPE:
1317	CODE:	1401	CODE:
1318	RETVAL = nreqs;	1402	RETVAL = eio_nreqs ();
1319	OUTPUT:	1403	OUTPUT:
1320	RETVAL	1404	RETVAL
1321		1405
		1406	int
		1407	nready ()
		1408	CODE:
		1409	RETVAL = eio_nready ();
		1410	OUTPUT:
		1411	RETVAL
		1412
		1413	int
		1414	npending ()
		1415	CODE:
		1416	RETVAL = eio_npending ();
		1417	OUTPUT:
		1418	RETVAL
		1419
		1420	int
		1421	nthreads ()
		1422	CODE:
		1423	RETVAL = eio_nthreads ();
		1424	OUTPUT:
		1425	RETVAL
		1426
		1427	int
		1428	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1429	CODE:
		1430	RETVAL = posix_fadvise (fh, offset, length, advice);
		1431	OUTPUT:
		1432	RETVAL
		1433
		1434	ssize_t
		1435	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1436	CODE:
		1437	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1438	OUTPUT:
		1439	RETVAL
		1440
		1441	void
		1442	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1443	PPCODE:
		1444	sv_unmagic (scalar, MMAP_MAGIC);
		1445	{
		1446	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1447	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1448	if (addr == (void *)-1)
		1449	XSRETURN_NO;
		1450
		1451	sv_force_normal (scalar);
		1452
		1453	/* we store the length in mg_obj, as namlen is I32 :/ */
		1454	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1455	->mg_obj = (SV *)length;
		1456
		1457	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1458
		1459	if (!(prot & PROT_WRITE))
		1460	SvREADONLY_on (scalar);
		1461
		1462	if (SvLEN (scalar))
		1463	Safefree (SvPVX (scalar));
		1464
		1465	SvPVX (scalar) = (char *)addr;
		1466	SvCUR_set (scalar, length);
		1467	SvLEN_set (scalar, 0);
		1468	SvPOK_only (scalar);
		1469
		1470	XSRETURN_YES;
		1471	}
		1472
		1473	void
		1474	munmap (SV *scalar)
		1475	CODE:
		1476	sv_unmagic (scalar, MMAP_MAGIC);
		1477
		1478	int
		1479	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1480	ALIAS:
		1481	mprotect = 1
		1482	CODE:
		1483	{
		1484	STRLEN svlen;
		1485	void *addr = SvPVbyte (scalar, svlen);
		1486	size_t len = SvUV (length);
		1487
		1488	if (offset < 0)
		1489	offset += svlen;
		1490
		1491	if (offset < 0 || offset > svlen)
		1492	croak ("offset outside of scalar");
		1493
		1494	if (!SvOK (length) || len + offset > svlen)
		1495	len = svlen - offset;
		1496
		1497	addr = (void *)(((intptr_t)addr) + offset);
		1498	eio_page_align (&addr, &len);
		1499
		1500	switch (ix)
		1501	{
		1502	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1503	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1504	}
		1505	}
		1506	OUTPUT:
		1507	RETVAL
		1508
		1509	int
		1510	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1511	CODE:
		1512	{
		1513	STRLEN svlen;
		1514	void *addr = SvPVbyte (scalar, svlen);
		1515	size_t len = SvUV (length);
		1516
		1517	if (offset < 0)
		1518	offset += svlen;
		1519
		1520	if (offset < 0 || offset > svlen)
		1521	croak ("offset outside of scalar");
		1522
		1523	if (!SvOK (length) || len + offset > svlen)
		1524	len = svlen - offset;
		1525
		1526	addr = (void *)(((intptr_t)addr) + offset);
		1527	eio_page_align (&addr, &len);
		1528	#if _POSIX_MEMLOCK
		1529	RETVAL = munlock (addr, len);
		1530	#else
		1531	RETVAL = ((errno = ENOSYS), -1);
		1532	#endif
		1533	}
		1534	OUTPUT:
		1535	RETVAL
		1536
		1537	int
		1538	munlockall ()
		1539	CODE:
		1540	#if _POSIX_MEMLOCK
		1541	munlockall ();
		1542	#else
		1543	RETVAL = -1;
		1544	errno = ENOSYS;
		1545	#endif
		1546	OUTPUT:
		1547	RETVAL
		1548
		1549	void _on_next_submit (SV *cb)
		1550	CODE:
		1551	SvREFCNT_dec (on_next_submit);
		1552	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1553
1322	PROTOTYPES: DISABLE	1554	PROTOTYPES: DISABLE
1323		1555
1324	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1556	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1325		1557
1326	void	1558	void
1327	cancel (aio_req_ornot req)	1559	cancel (aio_req_ornot req)
1328	PROTOTYPE:
1329	CODE:	1560	CODE:
1330	req_cancel (req);	1561	eio_cancel (req);
1331		1562
1332	void	1563	void
1333	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1564	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1334	CODE:	1565	PPCODE:
		1566	{
		1567	if (GIMME_V != G_VOID)
		1568	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1569
		1570	if (items > 1)
		1571	{
		1572	SV *cb_cv =get_cb (callback);
		1573
1335	SvREFCNT_dec (req->callback);	1574	SvREFCNT_dec (req->callback);
1336	req->callback = newSVsv (callback);	1575	req->callback = SvREFCNT_inc (cb_cv);
		1576	}
		1577	}
1337		1578
1338	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1579	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1339		1580
1340	void	1581	void
1341	add (aio_req grp, ...)	1582	add (aio_req grp, ...)
1342	PPCODE:	1583	PPCODE:
1343	{	1584	{
1344	int i;	1585	int i;
1345	aio_req req;
1346		1586
1347	if (grp->fd == 2)	1587	if (grp->int1 == 2)
1348	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1588	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1349		1589
1350	for (i = 1; i < items; ++i )	1590	for (i = 1; i < items; ++i )
1351	{	1591	{
		1592	aio_req req;
		1593
1352	if (GIMME_V != G_VOID)	1594	if (GIMME_V != G_VOID)
1353	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1595	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1354		1596
1355	req = SvAIO_REQ (ST (i));	1597	req = SvAIO_REQ (ST (i));
1356		1598
1357	if (req)	1599	if (req)
1358	{	1600	eio_grp_add (grp, req);
1359	++grp->length;
1360	req->grp = grp;
1361
1362	req->grp_prev = 0;
1363	req->grp_next = grp->grp_first;
1364
1365	if (grp->grp_first)
1366	grp->grp_first->grp_prev = req;
1367
1368	grp->grp_first = req;
1369	}
1370	}	1601	}
1371	}	1602	}
		1603
		1604	void
		1605	cancel_subs (aio_req_ornot req)
		1606	CODE:
		1607	req_cancel_subs (req);
1372		1608
1373	void	1609	void
1374	result (aio_req grp, ...)	1610	result (aio_req grp, ...)
1375	CODE:	1611	CODE:
1376	{	1612	{
1377	int i;	1613	int i;
		1614	AV *av;
		1615
		1616	grp->errorno = errno;
		1617
1378	AV *av = newAV ();	1618	av = newAV ();
		1619	av_extend (av, items - 1);
1379		1620
1380	for (i = 1; i < items; ++i )	1621	for (i = 1; i < items; ++i )
1381	av_push (av, newSVsv (ST (i)));	1622	av_push (av, newSVsv (ST (i)));
1382		1623
1383	SvREFCNT_dec (grp->data);	1624	SvREFCNT_dec (grp->sv1);
1384	grp->data = (SV *)av;	1625	grp->sv1 = (SV *)av;
1385	}	1626	}
1386		1627
1387	void	1628	void
		1629	errno (aio_req grp, int errorno = errno)
		1630	CODE:
		1631	grp->errorno = errorno;
		1632
		1633	void
1388	feed_limit (aio_req grp, int limit)	1634	limit (aio_req grp, int limit)
1389	CODE:	1635	CODE:
1390	grp->fd2 = limit;	1636	eio_grp_limit (grp, limit);
1391	aio_grp_feed (grp);
1392		1637
1393	void	1638	void
1394	feed (aio_req grp, SV *callback=&PL_sv_undef)	1639	feed (aio_req grp, SV *callback=&PL_sv_undef)
1395	CODE:	1640	CODE:
1396	{	1641	{
1397	SvREFCNT_dec (grp->fh2);	1642	SvREFCNT_dec (grp->sv2);
1398	grp->fh2 = newSVsv (callback);	1643	grp->sv2 = newSVsv (callback);
		1644	grp->feed = aio_grp_feed;
1399		1645
1400	if (grp->fd2 <= 0)	1646	if (grp->int2 <= 0)
1401	grp->fd2 = 2;	1647	grp->int2 = 2;
1402		1648
1403	aio_grp_feed (grp);	1649	eio_grp_limit (grp, grp->int2);
1404	}	1650	}
1405		1651

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