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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.53 by root, Mon Oct 23 00:17:07 2006 UTC vs.
Revision 1.169 by root, Wed Aug 4 16:06:54 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/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	#ifndef POSIX_MADV_NORMAL
		146	# define POSIX_MADV_NORMAL 0
		147	# define NO_MADVISE 1
		148	#endif
		149	#ifndef POSIX_MADV_SEQUENTIAL
		150	# define POSIX_MADV_SEQUENTIAL 0
		151	#endif
		152	#ifndef POSIX_MADV_RANDOM
		153	# define POSIX_MADV_RANDOM 0
		154	#endif
		155	#ifndef POSIX_MADV_WILLNEED
		156	# define POSIX_MADV_WILLNEED 0
		157	#endif
		158	#ifndef POSIX_MADV_DONTNEED
		159	# define POSIX_MADV_DONTNEED 0
		160	#endif
		161
		162	#ifndef ST_NODEV
		163	# define ST_NODEV 0
		164	#endif
		165	#ifndef ST_NOEXEC
		166	# define ST_NOEXEC 0
		167	#endif
		168	#ifndef ST_SYNCHRONOUS
		169	# define ST_SYNCHRONOUS 0
		170	#endif
		171	#ifndef ST_MANDLOCK
		172	# define ST_MANDLOCK 0
		173	#endif
		174	#ifndef ST_WRITE
		175	# define ST_WRITE 0
		176	#endif
		177	#ifndef ST_APPEND
		178	# define ST_APPEND 0
		179	#endif
		180	#ifndef ST_IMMUTABLE
		181	# define ST_IMMUTABLE 0
		182	#endif
		183	#ifndef ST_NOATIME
		184	# define ST_NOATIME 0
		185	#endif
		186	#ifndef ST_NODIRATIME
		187	# define ST_NODIRATIME 0
		188	#endif
		189	#ifndef ST_RELATIME
		190	# define ST_RELATIME 0
		191	#endif
		192
		193	#ifndef MCL_CURRENT
		194	# define MCL_CURRENT 0
		195	#endif
		196	#ifndef MCL_FUTURE
		197	# define MCL_FUTURE 0
		198	#endif
		199
		200	#ifndef MAP_ANONYMOUS
		201	# ifdef MAP_ANON
		202	# define MAP_ANONYMOUS MAP_ANON
34	# else	203	# else
35	# error sendfile support requested but not available	204	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	205	# endif
37	#endif	206	#endif
38		207	#ifndef MAP_HUGETLB
39	/* used for struct dirent, AIX doesn't provide it */	208	# define MAP_HUGETLB 0
40	#ifndef NAME_MAX
41	# define NAME_MAX 4096
42	#endif	209	#endif
43		210	#ifndef MAP_LOCKED
44	#if __ia64	211	# define MAP_LOCKED 0
45	# define STACKSIZE 65536
46	#else
47	# define STACKSIZE 8192
48	#endif	212	#endif
		213	#ifndef MAP_NORESERVE
		214	# define MAP_NORESERVE 0
		215	#endif
		216	#ifndef MAP_POPULATE
		217	# define MAP_POPULATE 0
		218	#endif
		219	#ifndef MAP_NONBLOCK
		220	# define MAP_NONBLOCK 0
		221	#endif
		222
		223	#ifndef PAGESIZE
		224	# define PAGESIZE sysconf (_SC_PAGESIZE)
		225	#endif
		226
		227	static int req_invoke (eio_req *req);
		228	#define EIO_FINISH(req) req_invoke (req)
		229	static void req_destroy (eio_req *grp);
		230	#define EIO_DESTROY(req) req_destroy (req)
49		231
50	enum {	232	enum {
51	REQ_QUIT,	233	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};	234	};
63		235
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	236	#include "libeio/eio.c"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		237
67	typedef struct aio_cb
68	{
69	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;
76	SV *fh, *fh2;
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */
88	unsigned char cancelled;
89	} aio_cb;
90
91	typedef aio_cb *aio_req;	238	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	239	typedef eio_req *aio_req_ornot;
93		240
94	static int started, wanted;	241	static SV *on_next_submit;
95	static volatile int nreqs;	242	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	243	static int max_outstanding;
97	static int respipe [2];
98		244
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	245	static s_epipe respipe;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		246
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	247	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_invoke (aio_req req);	248	static void req_cancel (aio_req req);
107	static void req_free (aio_req req);	249
		250	static void want_poll (void)
		251	{
		252	/* write a dummy byte to the pipe so fh becomes ready */
		253	s_epipe_signal (&respipe);
		254	}
		255
		256	static void done_poll (void)
		257	{
		258	/* read any signals sent by the worker threads */
		259	s_epipe_drain (&respipe);
		260	}
108		261
109	/* must be called at most once */	262	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	263	static SV *req_sv (aio_req req, HV *stash)
111	{	264	{
112	if (!req->self)	265	if (!req->self)
113	{	266	{
114	req->self = (SV *)newHV ();	267	req->self = (SV *)newHV ();
115	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	268	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
116	}	269	}
117		270
118	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	271	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
119	}	272	}
120		273
121	static aio_req SvAIO_REQ (SV *sv)	274	static aio_req SvAIO_REQ (SV *sv)
122	{	275	{
123	MAGIC *mg;	276	MAGIC *mg;
124		277
125	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	278	if (!SvROK (sv)
		279	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		280	&& SvSTASH (SvRV (sv)) != aio_req_stash
		281	&& !sv_derived_from (sv, "IO::AIO::REQ")))
126	croak ("object of class " AIO_REQ_KLASS " expected");	282	croak ("object of class IO::AIO::REQ expected");
127		283
128	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	284	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
129		285
130	return mg ? (aio_req)mg->mg_ptr : 0;	286	return mg ? (aio_req)mg->mg_ptr : 0;
131	}	287	}
132		288
133	static void aio_grp_feed (aio_req grp)	289	static void aio_grp_feed (aio_req grp)
134	{	290	{
135	while (grp->length < grp->fd2)	291	if (grp->sv2 && SvOK (grp->sv2))
136	{	292	{
137	int old_len = grp->length;	293	dSP;
138		294
139	if (grp->fh2 && SvOK (grp->fh2))	295	ENTER;
		296	SAVETMPS;
		297	PUSHMARK (SP);
		298	XPUSHs (req_sv (grp, aio_grp_stash));
		299	PUTBACK;
		300	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		301	SPAGAIN;
		302	FREETMPS;
		303	LEAVE;
		304	}
		305	}
		306
		307	static void req_submit (eio_req *req)
		308	{
		309	eio_submit (req);
		310
		311	if (expect_false (on_next_submit))
		312	{
		313	dSP;
		314	SV *cb = sv_2mortal (on_next_submit);
		315
		316	on_next_submit = 0;
		317
		318	PUSHMARK (SP);
		319	PUTBACK;
		320	call_sv (cb, G_DISCARD | G_EVAL);
		321	}
		322	}
		323
		324	static int req_invoke (eio_req *req)
		325	{
		326	if (req->flags & FLAG_SV2_RO_OFF)
		327	SvREADONLY_off (req->sv2);
		328
		329	if (!EIO_CANCELLED (req) && req->callback)
		330	{
		331	dSP;
		332	static SV *sv_result_cache; /* caches the result integer SV */
		333	SV *sv_result;
		334
		335	ENTER;
		336	SAVETMPS;
		337	PUSHMARK (SP);
		338	EXTEND (SP, 1);
		339
		340	/* do not recreate the result IV from scratch each time */
		341	if (expect_true (sv_result_cache))
140	{	342	{
141	dSP;	343	sv_result = sv_result_cache; sv_result_cache = 0;
142		344	SvIV_set (sv_result, req->result);
143	ENTER;
144	SAVETMPS;
145	PUSHMARK (SP);
146	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
147	PUTBACK;
148	call_sv (grp->fh2, G_VOID | G_EVAL);
149	SPAGAIN;
150	FREETMPS;
151	LEAVE;
152	}	345	}
153		346	else
154	/* stop if no progress has been made */
155	if (old_len == grp->length)
156	{	347	{
157	SvREFCNT_dec (grp->fh2);	348	sv_result = newSViv (req->result);
158	grp->fh2 = 0;	349	SvREADONLY_on (sv_result);
159	break;
160	}	350	}
		351
		352	switch (req->type)
		353	{
		354	case EIO_READDIR:
		355	{
		356	SV *rv = &PL_sv_undef;
		357
		358	if (req->result >= 0)
		359	{
		360	int i;
		361	char *names = (char *)req->ptr2;
		362	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		363	AV *av = newAV ();
		364
		365	av_extend (av, req->result - 1);
		366
		367	for (i = 0; i < req->result; ++i)
		368	{
		369	if (req->int1 & EIO_READDIR_DENTS)
		370	{
		371	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		372
		373	if (req->int1 & EIO_READDIR_CUSTOM2)
		374	{
		375	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		376	AV *avent = newAV ();
		377
		378	av_extend (avent, 2);
		379
		380	if (!sv_type [ent->type])
		381	{
		382	sv_type [ent->type] = newSViv (ent->type);
		383	SvREADONLY_on (sv_type [ent->type]);
		384	}
		385
		386	av_store (avent, 0, namesv);
		387	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		388	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		389
		390	av_store (av, i, newRV_noinc ((SV *)avent));
		391	}
		392	else
		393	av_store (av, i, namesv);
		394
		395	++ent;
		396	}
		397	else
		398	{
		399	SV *name = newSVpv (names, 0);
		400	av_store (av, i, name);
		401	names += SvCUR (name) + 1;
		402	}
		403	}
		404
		405	rv = sv_2mortal (newRV_noinc ((SV *)av));
		406	}
		407
		408	PUSHs (rv);
		409
		410	if (req->int1 & EIO_READDIR_CUSTOM1)
		411	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		412	}
		413	break;
		414
		415	case EIO_OPEN:
		416	{
		417	/* convert fd to fh */
		418	SV *fh = &PL_sv_undef;
		419
		420	if (req->result >= 0)
		421	{
		422	GV *gv = (GV *)sv_newmortal ();
		423	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		424	char sym [64];
		425	int symlen;
		426
		427	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		428	gv_init (gv, aio_stash, sym, symlen, 0);
		429
		430	symlen = snprintf (
		431	sym,
		432	sizeof (sym),
		433	"%s&=%d",
		434	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		435	(int)req->result
		436	);
		437
		438	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		439	fh = (SV *)gv;
		440	}
		441
		442	PUSHs (fh);
		443	}
		444	break;
		445
		446	case EIO_STATVFS:
		447	case EIO_FSTATVFS:
		448	{
		449	SV *rv = &PL_sv_undef;
		450
		451	if (req->result >= 0)
		452	{
		453	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		454	HV *hv = newHV ();
		455
		456	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		457
		458	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		459	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		460	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		461	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		462	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		463	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		464	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		465	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		466	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		467	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		468	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		469	}
		470
		471	PUSHs (rv);
		472	}
		473
		474	break;
		475
		476	case EIO_GROUP:
		477	req->int1 = 2; /* mark group as finished */
		478
		479	if (req->sv1)
		480	{
		481	int i;
		482	AV *av = (AV *)req->sv1;
		483
		484	EXTEND (SP, AvFILL (av) + 1);
		485	for (i = 0; i <= AvFILL (av); ++i)
		486	PUSHs (*av_fetch (av, i, 0));
		487	}
		488	break;
		489
		490	case EIO_NOP:
		491	case EIO_BUSY:
		492	break;
		493
		494	case EIO_READLINK:
		495	if (req->result > 0)
		496	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		497	break;
		498
		499	case EIO_STAT:
		500	case EIO_LSTAT:
		501	case EIO_FSTAT:
		502	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		503	PL_laststatval = req->result;
		504	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		505	PUSHs (sv_result);
		506	break;
		507
		508	case EIO_READ:
		509	{
		510	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		511	*SvEND (req->sv2) = 0;
		512	SvPOK_only (req->sv2);
		513	SvSETMAGIC (req->sv2);
		514	PUSHs (sv_result);
		515	}
		516	break;
		517
		518	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		519	if (req->result > 0)
		520	SvIV_set (sv_result, 0);
		521	/* FALLTHROUGH */
		522
		523	default:
		524	PUSHs (sv_result);
		525	break;
		526	}
		527
		528	errno = req->errorno;
		529
		530	PUTBACK;
		531	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		532	SPAGAIN;
		533
		534	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		535	SvREFCNT_dec (sv_result);
		536	else
		537	sv_result_cache = sv_result;
		538
		539	FREETMPS;
		540	LEAVE;
		541
		542	PUTBACK;
161	}	543	}
162	}
163		544
164	static void aio_grp_dec (aio_req grp)	545	return !!SvTRUE (ERRSV);
165	{
166	--grp->length;
167
168	/* call feeder, if applicable */
169	aio_grp_feed (grp);
170
171	/* finish, if done */
172	if (!grp->length && grp->fd)
173	{
174	req_invoke (grp);
175	req_free (grp);
176	}
177	}	546	}
178		547
179	static void poll_wait ()
180	{
181	if (nreqs && !ress)
182	{
183	fd_set rfd;
184	FD_ZERO(&rfd);
185	FD_SET(respipe [0], &rfd);
186
187	select (respipe [0] + 1, &rfd, 0, 0, 0);
188	}
189	}
190
191	static void req_invoke (aio_req req)
192	{
193	dSP;
194	int errorno = errno;
195
196	if (req->cancelled || !SvOK (req->callback))
197	return;
198
199	errno = req->errorno;
200
201	ENTER;
202	SAVETMPS;
203	PUSHMARK (SP);
204	EXTEND (SP, 1);
205
206	switch (req->type)
207	{
208	case REQ_READDIR:
209	{
210	SV *rv = &PL_sv_undef;
211
212	if (req->result >= 0)
213	{
214	char *buf = req->data2ptr;
215	AV *av = newAV ();
216
217	while (req->result)
218	{
219	SV *sv = newSVpv (buf, 0);
220
221	av_push (av, sv);
222	buf += SvCUR (sv) + 1;
223	req->result--;
224	}
225
226	rv = sv_2mortal (newRV_noinc ((SV *)av));
227	}
228
229	PUSHs (rv);
230	}
231	break;
232
233	case REQ_OPEN:
234	{
235	/* convert fd to fh */
236	SV *fh;
237
238	PUSHs (sv_2mortal (newSViv (req->result)));
239	PUTBACK;
240	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
241	SPAGAIN;
242
243	fh = SvREFCNT_inc (POPs);
244
245	PUSHMARK (SP);
246	XPUSHs (sv_2mortal (fh));
247	}
248	break;
249
250	case REQ_GROUP:
251	req->fd = 2; /* mark group as finished */
252
253	if (req->data)
254	{
255	int i;
256	AV *av = (AV *)req->data;
257
258	EXTEND (SP, AvFILL (av) + 1);
259	for (i = 0; i <= AvFILL (av); ++i)
260	PUSHs (*av_fetch (av, i, 0));
261	}
262	break;
263
264	case REQ_SLEEP:
265	break;
266
267	default:
268	PUSHs (sv_2mortal (newSViv (req->result)));
269	break;
270	}
271
272
273	PUTBACK;
274	call_sv (req->callback, G_VOID | G_EVAL);
275	SPAGAIN;
276
277	FREETMPS;
278	LEAVE;
279
280	errno = errorno;
281
282	if (SvTRUE (ERRSV))
283	{
284	req_free (req);
285	croak (0);
286	}
287	}
288
289	static void req_free (aio_req req)	548	static void req_destroy (aio_req req)
290	{	549	{
291	if (req->grp)
292	{
293	aio_req grp = req->grp;
294
295	/* unlink request */
296	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
297	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
298
299	if (grp->grp_first == req)
300	grp->grp_first = req->grp_next;
301
302	aio_grp_dec (grp);
303	}
304
305	if (req->self)	550	if (req->self)
306	{	551	{
307	sv_unmagic (req->self, PERL_MAGIC_ext);	552	sv_unmagic (req->self, PERL_MAGIC_ext);
308	SvREFCNT_dec (req->self);	553	SvREFCNT_dec (req->self);
309	}	554	}
310		555
311	SvREFCNT_dec (req->data);
312	SvREFCNT_dec (req->fh);	556	SvREFCNT_dec (req->sv1);
313	SvREFCNT_dec (req->fh2);	557	SvREFCNT_dec (req->sv2);
314	SvREFCNT_dec (req->callback);	558	SvREFCNT_dec (req->callback);
315	Safefree (req->statdata);
316
317	if (req->type == REQ_READDIR && req->result >= 0)
318	free (req->data2ptr);
319		559
320	Safefree (req);	560	Safefree (req);
321	}	561	}
322		562
323	static void req_cancel (aio_req req)	563	static void req_cancel_subs (aio_req grp)
324	{	564	{
325	req->cancelled = 1;	565	aio_req sub;
326		566
327	if (req->type == REQ_GROUP)	567	if (grp->type != EIO_GROUP)
		568	return;
		569
		570	SvREFCNT_dec (grp->sv2);
		571	grp->sv2 = 0;
		572
		573	eio_grp_cancel (grp);
		574	}
		575
		576	static void
		577	create_respipe (void)
		578	{
		579	if (s_epipe_renew (&respipe))
		580	croak ("IO::AIO: unable to initialize result pipe");
		581	}
		582
		583	static void poll_wait (void)
		584	{
		585	while (eio_nreqs ())
328	{	586	{
329	aio_req sub;	587	int size;
330		588
331	for (sub = req->grp_first; sub; sub = sub->grp_next)	589	X_LOCK (reslock);
332	req_cancel (sub);	590	size = res_queue.size;
		591	X_UNLOCK (reslock);
		592
		593	if (size)
		594	return;
		595
		596	etp_maybe_start_thread ();
		597
		598	s_epipe_wait (&respipe);
333	}	599	}
334	}	600	}
335		601
336	static int poll_cb ()	602	static int poll_cb (void)
337	{	603	{
338	dSP;
339	int count = 0;
340	int do_croak = 0;
341	aio_req req;
342
343	for (;;)	604	for (;;)
344	{	605	{
345	pthread_mutex_lock (&reslock);	606	int res = eio_poll ();
346	req = ress;
347		607
348	if (req)	608	if (res > 0)
349	{
350	ress = req->next;
351
352	if (!ress)
353	{
354	/* read any signals sent by the worker threads */
355	char buf [32];
356	while (read (respipe [0], buf, 32) == 32)
357	;
358
359	rese = 0;
360	}
361	}
362
363	pthread_mutex_unlock (&reslock);
364
365	if (!req)
366	break;	609	croak (0);
367		610
368	--nreqs;	611	if (!max_outstanding || max_outstanding > eio_nreqs ())
		612	return res;
369		613
370	if (req->type == REQ_QUIT)	614	poll_wait ();
371	started--;
372	else if (req->type == REQ_GROUP && req->length)
373	{
374	req->fd = 1; /* mark request as delayed */
375	continue;
376	}
377	else
378	{
379	if (req->type == REQ_READ)
380	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
381
382	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
383	SvREADONLY_off (req->data);
384
385	if (req->statdata)
386	{
387	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
388	PL_laststatval = req->result;
389	PL_statcache = *(req->statdata);
390	}
391
392	req_invoke (req);
393
394	count++;
395	}
396
397	req_free (req);
398	}	615	}
399
400	return count;
401	}	616	}
402		617
403	static void *aio_proc(void *arg);
404
405	static void start_thread (void)	618	static void atfork_child (void)
406	{	619	{
407	sigset_t fullsigset, oldsigset;	620	create_respipe ();
408	pthread_t tid;
409	pthread_attr_t attr;
410
411	pthread_attr_init (&attr);
412	pthread_attr_setstacksize (&attr, STACKSIZE);
413	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
414
415	sigfillset (&fullsigset);
416	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
417
418	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
419	started++;
420
421	sigprocmask (SIG_SETMASK, &oldsigset, 0);
422	}
423
424	static void req_send (aio_req req)
425	{
426	while (started < wanted && nreqs >= started)
427	start_thread ();
428
429	++nreqs;
430
431	pthread_mutex_lock (&reqlock);
432
433	req->next = 0;
434
435	if (reqe)
436	{
437	reqe->next = req;
438	reqe = req;
439	}
440	else
441	reqe = reqs = req;
442
443	pthread_cond_signal (&reqwait);
444	pthread_mutex_unlock (&reqlock);
445
446	if (nreqs > max_outstanding)
447	for (;;)
448	{
449	poll_cb ();
450
451	if (nreqs <= max_outstanding)
452	break;
453
454	poll_wait ();
455	}
456	}
457
458	static void end_thread (void)
459	{
460	aio_req req;
461	Newz (0, req, 1, aio_cb);
462	req->type = REQ_QUIT;
463
464	req_send (req);
465	}
466
467	static void min_parallel (int nthreads)
468	{
469	if (wanted < nthreads)
470	wanted = nthreads;
471	}
472
473	static void max_parallel (int nthreads)
474	{
475	int cur = started;
476
477	if (wanted > nthreads)
478	wanted = nthreads;
479
480	while (cur > wanted)
481	{
482	end_thread ();
483	cur--;
484	}
485
486	while (started > wanted)
487	{
488	poll_wait ();
489	poll_cb ();
490	}
491	}
492
493	static void create_pipe ()
494	{
495	if (pipe (respipe))
496	croak ("unable to initialize result pipe");
497
498	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
499	croak ("cannot set result pipe to nonblocking mode");
500
501	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
502	croak ("cannot set result pipe to nonblocking mode");
503	}	621	}
504		622
505	/*****************************************************************************/	623	/*****************************************************************************/
506	/* work around various missing functions */
507		624
508	#if !HAVE_PREADWRITE	625	#if !_POSIX_MAPPED_FILES
509	# define pread aio_pread	626	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
510	# define pwrite aio_pwrite	627	# define munmap(addr,length) (errno = ENOSYS, -1)
511
512	/*
513	* make our pread/pwrite safe against themselves, but not against
514	* normal read/write by using a mutex. slows down execution a lot,
515	* but that's your problem, not mine.
516	*/
517	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
518
519	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
520	{
521	ssize_t res;
522	off_t ooffset;
523
524	pthread_mutex_lock (&preadwritelock);
525	ooffset = lseek (fd, 0, SEEK_CUR);
526	lseek (fd, offset, SEEK_SET);
527	res = read (fd, buf, count);
528	lseek (fd, ooffset, SEEK_SET);
529	pthread_mutex_unlock (&preadwritelock);
530
531	return res;
532	}
533
534	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
535	{
536	ssize_t res;
537	off_t ooffset;
538
539	pthread_mutex_lock (&preadwritelock);
540	ooffset = lseek (fd, 0, SEEK_CUR);
541	lseek (fd, offset, SEEK_SET);
542	res = write (fd, buf, count);
543	lseek (fd, offset, SEEK_SET);
544	pthread_mutex_unlock (&preadwritelock);
545
546	return res;
547	}
548	#endif
549
550	#if !HAVE_FDATASYNC
551	# define fdatasync fsync
552	#endif
553
554	#if !HAVE_READAHEAD
555	# define readahead aio_readahead
556
557	static ssize_t readahead (int fd, off_t offset, size_t count)
558	{
559	char readahead_buf[4096];
560
561	while (count > 0)
562	{
563	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
564
565	pread (fd, readahead_buf, len, offset);
566	offset += len;
567	count -= len;
568	}
569
570	errno = 0;
571	}
572	#endif
573
574	#if !HAVE_READDIR_R
575	# define readdir_r aio_readdir_r
576
577	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
578
579	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
580	{
581	struct dirent *e;
582	int errorno;
583
584	pthread_mutex_lock (&readdirlock);
585
586	e = readdir (dirp);
587	errorno = errno;
588
589	if (e)
590	{
591	*res = ent;
592	strcpy (ent->d_name, e->d_name);
593	}
594	else
595	*res = 0;
596
597	pthread_mutex_unlock (&readdirlock);
598
599	errno = errorno;
600	return e ? 0 : -1;
601	}
602	#endif
603
604	/* sendfile always needs emulation */
605	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
606	{
607	ssize_t res;
608
609	if (!count)
610	return 0;
611
612	#if HAVE_SENDFILE
613	# if __linux
614	res = sendfile (ofd, ifd, &offset, count);
615
616	# elif __freebsd
617	/*
618	* Of course, the freebsd sendfile is a dire hack with no thoughts
619	* wasted on making it similar to other I/O functions.
620	*/
621	{
622	off_t sbytes;
623	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
624
625	if (res < 0 && sbytes)
626	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
627	res = sbytes;
628	}
629
630	# elif __hpux
631	res = sendfile (ofd, ifd, offset, count, 0, 0);
632
633	# elif __solaris
634	{
635	struct sendfilevec vec;
636	size_t sbytes;
637
638	vec.sfv_fd = ifd;
639	vec.sfv_flag = 0;
640	vec.sfv_off = offset;
641	vec.sfv_len = count;
642
643	res = sendfilev (ofd, &vec, 1, &sbytes);
644
645	if (res < 0 && sbytes)
646	res = sbytes;
647	}
648
649	# endif	628	#endif
650	#else
651	res = -1;
652	errno = ENOSYS;
653	#endif
654		629
655	if (res < 0	630	#define MMAP_MAGIC PERL_MAGIC_ext
656	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
657	#if __solaris
658	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
659	#endif
660	)
661	)
662	{
663	/* emulate sendfile. this is a major pain in the ass */
664	char buf[4096];
665	res = 0;
666		631
667	while (count)	632	static int
668	{	633	mmap_free (pTHX_ SV *sv, MAGIC *mg)
669	ssize_t cnt;
670
671	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
672
673	if (cnt <= 0)
674	{
675	if (cnt && !res) res = -1;
676	break;
677	}
678
679	cnt = write (ofd, buf, cnt);
680
681	if (cnt <= 0)
682	{
683	if (cnt && !res) res = -1;
684	break;
685	}
686
687	offset += cnt;
688	res += cnt;
689	count -= cnt;
690	}
691	}
692
693	return res;
694	}
695
696	/* read a full directory */
697	static int scandir_ (const char *path, void **namesp)
698	{	634	{
699	DIR *dirp = opendir (path);	635	int old_errno = errno;
700	union	636	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
701	{
702	struct dirent d;
703	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
704	} u;
705	struct dirent *entp;
706	char *name, *names;
707	int memlen = 4096;
708	int memofs = 0;
709	int res = 0;
710	int errorno;
711
712	if (!dirp)
713	return -1;
714
715	names = malloc (memlen);
716
717	for (;;)
718	{
719	errno = 0, readdir_r (dirp, &u.d, &entp);
720
721	if (!entp)
722	break;
723
724	name = entp->d_name;
725
726	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
727	{
728	int len = strlen (name) + 1;
729
730	res++;
731
732	while (memofs + len > memlen)
733	{
734	memlen *= 2;
735	names = realloc (names, memlen);
736	if (!names)
737	break;
738	}
739
740	memcpy (names + memofs, name, len);
741	memofs += len;
742	}
743	}
744
745	errorno = errno;	637	errno = old_errno;
746	closedir (dirp);
747		638
748	if (errorno)	639	mg->mg_obj = 0; /* just in case */
749	{
750	free (names);
751	errno = errorno;
752	res = -1;
753	}
754		640
755	*namesp = (void *)names;	641	SvREADONLY_off (sv);
		642
		643	if (SvPVX (sv) != mg->mg_ptr)
		644	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		645
		646	SvCUR_set (sv, 0);
		647	SvPVX (sv) = 0;
		648	SvOK_off (sv);
		649
756	return res;	650	return 0;
757	}	651	}
		652
		653	static MGVTBL mmap_vtbl = {
		654	0, 0, 0, 0, mmap_free
		655	};
758		656
759	/*****************************************************************************/	657	/*****************************************************************************/
760		658
761	static void *aio_proc (void *thr_arg)	659	static SV *
		660	get_cb (SV *cb_sv)
762	{	661	{
763	aio_req req;	662	SvGETMAGIC (cb_sv);
764	int type;	663	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
765
766	do
767	{
768	pthread_mutex_lock (&reqlock);
769
770	for (;;)
771	{
772	req = reqs;
773
774	if (reqs)
775	{
776	reqs = reqs->next;
777	if (!reqs) reqe = 0;
778	}
779
780	if (req)
781	break;
782
783	pthread_cond_wait (&reqwait, &reqlock);
784	}
785
786	pthread_mutex_unlock (&reqlock);
787
788	errno = 0; /* strictly unnecessary */
789
790	if (!req->cancelled)
791	switch (type = req->type) /* remember type for QUIT check */
792	{
793	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
794	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
795
796	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
797	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
798
799	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
800	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
801	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
802
803	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
804	case REQ_CLOSE: req->result = close (req->fd); break;
805	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
806	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
807	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
808	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
809	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
810
811	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
812	case REQ_FSYNC: req->result = fsync (req->fd); break;
813	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
814
815	case REQ_SLEEP:
816	{
817	struct timeval tv;
818
819	tv.tv_sec = req->fd;
820	tv.tv_usec = req->fd2;
821
822	req->result = select (0, 0, 0, 0, &tv);
823	}
824
825	case REQ_QUIT:
826	break;
827
828	default:
829	req->result = ENOSYS;
830	break;
831	}
832
833	req->errorno = errno;
834
835	pthread_mutex_lock (&reslock);
836
837	req->next = 0;
838
839	if (rese)
840	{
841	rese->next = req;
842	rese = req;
843	}
844	else
845	{
846	rese = ress = req;
847
848	/* write a dummy byte to the pipe so fh becomes ready */
849	write (respipe [1], &respipe, 1);
850	}
851
852	pthread_mutex_unlock (&reslock);
853	}
854	while (type != REQ_QUIT);
855
856	return 0;
857	}
858
859	/*****************************************************************************/
860
861	static void atfork_prepare (void)
862	{
863	pthread_mutex_lock (&reqlock);
864	pthread_mutex_lock (&reslock);
865	#if !HAVE_PREADWRITE
866	pthread_mutex_lock (&preadwritelock);
867	#endif
868	#if !HAVE_READDIR_R
869	pthread_mutex_lock (&readdirlock);
870	#endif
871	}
872
873	static void atfork_parent (void)
874	{
875	#if !HAVE_READDIR_R
876	pthread_mutex_unlock (&readdirlock);
877	#endif
878	#if !HAVE_PREADWRITE
879	pthread_mutex_unlock (&preadwritelock);
880	#endif
881	pthread_mutex_unlock (&reslock);
882	pthread_mutex_unlock (&reqlock);
883	}
884
885	static void atfork_child (void)
886	{
887	aio_req prv;
888
889	started = 0;
890
891	while (reqs)
892	{
893	prv = reqs;
894	reqs = prv->next;
895	req_free (prv);
896	}
897
898	reqs = reqe = 0;
899
900	while (ress)
901	{
902	prv = ress;
903	ress = prv->next;
904	req_free (prv);
905	}
906
907	ress = rese = 0;
908
909	close (respipe [0]);
910	close (respipe [1]);
911	create_pipe ();
912
913	atfork_parent ();
914	}	664	}
915		665
916	#define dREQ \	666	#define dREQ \
		667	SV *cb_cv; \
917	aio_req req; \	668	aio_req req; \
		669	int req_pri = next_pri; \
		670	next_pri = EIO_PRI_DEFAULT; \
918	\	671	\
919	if (SvOK (callback) && !SvROK (callback)) \	672	cb_cv = get_cb (callback); \
920	croak ("callback must be undef or of reference type"); \
921	\	673	\
922	Newz (0, req, 1, aio_cb); \	674	Newz (0, req, 1, eio_req); \
923	if (!req) \	675	if (!req) \
924	croak ("out of memory during aio_req allocation"); \	676	croak ("out of memory during eio_req allocation"); \
925	\	677	\
926	req->callback = newSVsv (callback)	678	req->callback = SvREFCNT_inc (cb_cv); \
		679	req->pri = req_pri
927		680
928	#define REQ_SEND \	681	#define REQ_SEND \
		682	PUTBACK; \
929	req_send (req); \	683	req_submit (req); \
		684	SPAGAIN; \
930	\	685	\
931	if (GIMME_V != G_VOID) \	686	if (GIMME_V != G_VOID) \
932	XPUSHs (req_sv (req, AIO_REQ_KLASS));	687	XPUSHs (req_sv (req, aio_req_stash));
933		688
934	MODULE = IO::AIO PACKAGE = IO::AIO	689	MODULE = IO::AIO PACKAGE = IO::AIO
935		690
936	PROTOTYPES: ENABLE	691	PROTOTYPES: ENABLE
937		692
938	BOOT:	693	BOOT:
939	{	694	{
		695	static const struct {
		696	const char *name;
		697	IV iv;
		698	} *civ, const_iv[] = {
		699	# define const_niv(name, value) { # name, (IV) value },
		700	# define const_iv(name) { # name, (IV) name },
		701	# define const_eio(name) { # name, (IV) EIO_ ## name },
		702	const_iv (EXDEV)
		703	const_iv (ENOSYS)
		704	const_iv (O_RDONLY)
		705	const_iv (O_WRONLY)
		706	const_iv (O_RDWR)
		707	const_iv (O_CREAT)
		708	const_iv (O_TRUNC)
		709	const_iv (O_EXCL)
		710	const_iv (O_APPEND)
		711	#ifndef _WIN32
		712	const_iv (S_IFIFO)
		713	#endif
		714	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		715	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		716	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		717	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		718	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		719	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		720
		721	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		722	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		723	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		724	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		725	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		726
		727	const_iv (ST_RDONLY)
		728	const_iv (ST_NOSUID)
		729	const_iv (ST_NODEV)
		730	const_iv (ST_NOEXEC)
		731	const_iv (ST_SYNCHRONOUS)
		732	const_iv (ST_MANDLOCK)
		733	const_iv (ST_WRITE)
		734	const_iv (ST_APPEND)
		735	const_iv (ST_IMMUTABLE)
		736	const_iv (ST_NOATIME)
		737	const_iv (ST_NODIRATIME)
		738	const_iv (ST_RELATIME)
		739
		740	const_iv (PROT_EXEC)
		741	const_iv (PROT_NONE)
		742	const_iv (PROT_READ)
		743	const_iv (PROT_WRITE)
		744
		745	/*const_iv (MAP_FIXED)*/
		746	const_iv (MAP_PRIVATE)
		747	const_iv (MAP_SHARED)
		748	const_iv (MAP_ANONYMOUS)
		749
		750	/* linuxish */
		751	const_iv (MAP_HUGETLB)
		752	const_iv (MAP_LOCKED)
		753	const_iv (MAP_NORESERVE)
		754	const_iv (MAP_POPULATE)
		755	const_iv (MAP_NONBLOCK)
		756
		757	const_iv (MCL_FUTURE)
		758	const_iv (MCL_CURRENT)
		759
		760	const_eio (MS_ASYNC)
		761	const_eio (MS_INVALIDATE)
		762	const_eio (MS_SYNC)
		763
		764	const_eio (MT_MODIFY)
		765
		766	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		767	const_eio (SYNC_FILE_RANGE_WRITE)
		768	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		769
		770	const_eio (READDIR_DENTS)
		771	const_eio (READDIR_DIRS_FIRST)
		772	const_eio (READDIR_STAT_ORDER)
		773	const_eio (READDIR_FOUND_UNKNOWN)
		774
		775	const_eio (DT_UNKNOWN)
		776	const_eio (DT_FIFO)
		777	const_eio (DT_CHR)
		778	const_eio (DT_DIR)
		779	const_eio (DT_BLK)
		780	const_eio (DT_REG)
		781	const_eio (DT_LNK)
		782	const_eio (DT_SOCK)
		783	const_eio (DT_WHT)
		784	};
		785
940	HV *stash = gv_stashpv ("IO::AIO", 1);	786	aio_stash = gv_stashpv ("IO::AIO" , 1);
941	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	787	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
942	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	788	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
943	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
944		789
		790	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		791	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		792
		793	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		794
945	create_pipe ();	795	create_respipe ();
946	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
947	}
948		796
		797	if (eio_init (want_poll, done_poll) < 0)
		798	croak ("IO::AIO: unable to initialise eio library");
		799
		800	/* atfork child called in fifo order, so before eio's handler */
		801	X_THREAD_ATFORK (0, 0, atfork_child);
		802	}
		803
949	void	804	void
950	min_parallel (nthreads)	805	max_poll_reqs (int nreqs)
951	int nthreads
952	PROTOTYPE: $	806	PROTOTYPE: $
		807	CODE:
		808	eio_set_max_poll_reqs (nreqs);
953		809
954	void	810	void
955	max_parallel (nthreads)	811	max_poll_time (double nseconds)
956	int nthreads
957	PROTOTYPE: $	812	PROTOTYPE: $
958
959	int
960	max_outstanding (nreqs)
961	int nreqs
962	PROTOTYPE: $
963	CODE:	813	CODE:
964	RETVAL = max_outstanding;	814	eio_set_max_poll_time (nseconds);
		815
		816	void
		817	min_parallel (int nthreads)
		818	PROTOTYPE: $
		819	CODE:
		820	eio_set_min_parallel (nthreads);
		821
		822	void
		823	max_parallel (int nthreads)
		824	PROTOTYPE: $
		825	CODE:
		826	eio_set_max_parallel (nthreads);
		827
		828	void
		829	max_idle (int nthreads)
		830	PROTOTYPE: $
		831	CODE:
		832	eio_set_max_idle (nthreads);
		833
		834	void
		835	max_outstanding (int maxreqs)
		836	PROTOTYPE: $
		837	CODE:
965	max_outstanding = nreqs;	838	max_outstanding = maxreqs;
966		839
967	void	840	void
968	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	841	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
969	SV * pathname
970	int flags
971	int mode
972	SV * callback
973	PROTOTYPE: $$$;$	842	PROTOTYPE: $$$;$
974	PPCODE:	843	PPCODE:
975	{	844	{
976	dREQ;	845	dREQ;
977		846
978	req->type = REQ_OPEN;	847	req->type = EIO_OPEN;
979	req->data = newSVsv (pathname);	848	req->sv1 = newSVsv (pathname);
980	req->dataptr = SvPVbyte_nolen (req->data);	849	req->ptr1 = SvPVbyte_nolen (req->sv1);
981	req->fd = flags;	850	req->int1 = flags;
982	req->mode = mode;	851	req->int2 = mode;
983		852
984	REQ_SEND;	853	REQ_SEND;
985	}	854	}
986		855
987	void	856	void
988	aio_close (fh,callback=&PL_sv_undef)	857	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
989	SV * fh
990	SV * callback
991	PROTOTYPE: $;$	858	PROTOTYPE: $;$
992	ALIAS:	859	ALIAS:
993	aio_close = REQ_CLOSE
994	aio_fsync = REQ_FSYNC	860	aio_fsync = EIO_FSYNC
995	aio_fdatasync = REQ_FDATASYNC	861	aio_fdatasync = EIO_FDATASYNC
996	PPCODE:	862	PPCODE:
997	{	863	{
		864	int fd = s_fileno_croak (fh, 0);
998	dREQ;	865	dREQ;
999		866
1000	req->type = ix;	867	req->type = ix;
1001	req->fh = newSVsv (fh);	868	req->sv1 = newSVsv (fh);
1002	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	869	req->int1 = fd;
1003		870
1004	REQ_SEND (req);	871	REQ_SEND (req);
1005	}	872	}
1006		873
1007	void	874	void
		875	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		876	PROTOTYPE: $$$$;$
		877	PPCODE:
		878	{
		879	int fd = s_fileno_croak (fh, 0);
		880	dREQ;
		881
		882	req->type = EIO_SYNC_FILE_RANGE;
		883	req->sv1 = newSVsv (fh);
		884	req->int1 = fd;
		885	req->offs = offset;
		886	req->size = nbytes;
		887	req->int2 = flags;
		888
		889	REQ_SEND (req);
		890	}
		891
		892	void
		893	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		894	PROTOTYPE: $;$
		895	PPCODE:
		896	{
		897	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		898	int fd = s_fileno_croak (fh, 0);
		899	dREQ;
		900
		901	if (close_pipe < 0)
		902	{
		903	int pipefd [2];
		904
		905	if (pipe (pipefd) < 0
		906	|| close (pipefd [1]) < 0
		907	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		908	abort (); /*D*/
		909
		910	close_pipe = pipefd [0];
		911	}
		912
		913	req->type = EIO_DUP2;
		914	req->int1 = close_pipe;
		915	req->sv2 = newSVsv (fh);
		916	req->int2 = fd;
		917
		918	REQ_SEND (req);
		919	}
		920
		921	void
1008	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	922	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1009	SV * fh
1010	UV offset
1011	UV length
1012	SV * data
1013	UV dataoffset
1014	SV * callback
1015	ALIAS:	923	ALIAS:
1016	aio_read = REQ_READ	924	aio_read = EIO_READ
1017	aio_write = REQ_WRITE	925	aio_write = EIO_WRITE
1018	PROTOTYPE: $$$$$;$	926	PROTOTYPE: $$$$$;$
1019	PPCODE:	927	PPCODE:
1020	{	928	{
1021	aio_req req;
1022	STRLEN svlen;	929	STRLEN svlen;
		930	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1023	char *svptr = SvPVbyte (data, svlen);	931	char *svptr = SvPVbyte (data, svlen);
1024		932	UV len = SvUV (length);
1025	SvUPGRADE (data, SVt_PV);
1026	SvPOK_on (data);
1027		933
1028	if (dataoffset < 0)	934	if (dataoffset < 0)
1029	dataoffset += svlen;	935	dataoffset += svlen;
1030		936
1031	if (dataoffset < 0 || dataoffset > svlen)	937	if (dataoffset < 0 || dataoffset > svlen)
1032	croak ("data offset outside of string");	938	croak ("dataoffset outside of data scalar");
1033		939
1034	if (ix == REQ_WRITE)	940	if (ix == EIO_WRITE)
1035	{	941	{
1036	/* write: check length and adjust. */	942	/* write: check length and adjust. */
1037	if (length < 0 || length + dataoffset > svlen)	943	if (!SvOK (length) || len + dataoffset > svlen)
1038	length = svlen - dataoffset;	944	len = svlen - dataoffset;
1039	}	945	}
1040	else	946	else
1041	{	947	{
1042	/* read: grow scalar as necessary */	948	/* read: check type and grow scalar as necessary */
		949	SvUPGRADE (data, SVt_PV);
1043	svptr = SvGROW (data, length + dataoffset);	950	svptr = SvGROW (data, len + dataoffset + 1);
1044	}	951	}
1045
1046	if (length < 0)
1047	croak ("length must not be negative");
1048		952
1049	{	953	{
1050	dREQ;	954	dREQ;
1051		955
1052	req->type = ix;	956	req->type = ix;
1053	req->fh = newSVsv (fh);	957	req->sv1 = newSVsv (fh);
1054	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	958	req->int1 = fd;
1055	: IoOFP (sv_2io (fh)));	959	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1056	req->offset = offset;	960	req->size = len;
1057	req->length = length;
1058	req->data = SvREFCNT_inc (data);	961	req->sv2 = SvREFCNT_inc (data);
1059	req->dataptr = (char *)svptr + dataoffset;	962	req->ptr2 = (char *)svptr + dataoffset;
		963	req->stroffset = dataoffset;
1060		964
1061	if (!SvREADONLY (data))	965	if (!SvREADONLY (data))
1062	{	966	{
1063	SvREADONLY_on (data);	967	SvREADONLY_on (data);
1064	req->data2ptr = (void *)data;	968	req->flags |= FLAG_SV2_RO_OFF;
1065	}	969	}
1066		970
1067	REQ_SEND;	971	REQ_SEND;
1068	}	972	}
1069	}	973	}
1070		974
1071	void	975	void
		976	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		977	PROTOTYPE: $$;$
		978	PPCODE:
		979	{
		980	SV *data;
		981	dREQ;
		982
		983	req->type = EIO_READLINK;
		984	req->sv1 = newSVsv (path);
		985	req->ptr1 = SvPVbyte_nolen (req->sv1);
		986
		987	REQ_SEND;
		988	}
		989
		990	void
1072	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	991	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1073	SV * out_fh
1074	SV * in_fh
1075	UV in_offset
1076	UV length
1077	SV * callback
1078	PROTOTYPE: $$$$;$	992	PROTOTYPE: $$$$;$
1079	PPCODE:	993	PPCODE:
1080	{	994	{
		995	int ifd = s_fileno_croak (in_fh , 0);
		996	int ofd = s_fileno_croak (out_fh, 1);
1081	dREQ;	997	dREQ;
1082		998
1083	req->type = REQ_SENDFILE;	999	req->type = EIO_SENDFILE;
1084	req->fh = newSVsv (out_fh);	1000	req->sv1 = newSVsv (out_fh);
1085	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1001	req->int1 = ofd;
1086	req->fh2 = newSVsv (in_fh);	1002	req->sv2 = newSVsv (in_fh);
1087	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1003	req->int2 = ifd;
1088	req->offset = in_offset;	1004	req->offs = in_offset;
1089	req->length = length;	1005	req->size = length;
1090		1006
1091	REQ_SEND;	1007	REQ_SEND;
1092	}	1008	}
1093		1009
1094	void	1010	void
1095	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1011	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1096	SV * fh
1097	UV offset
1098	IV length
1099	SV * callback
1100	PROTOTYPE: $$$;$	1012	PROTOTYPE: $$$;$
1101	PPCODE:	1013	PPCODE:
1102	{	1014	{
		1015	int fd = s_fileno_croak (fh, 0);
1103	dREQ;	1016	dREQ;
1104		1017
1105	req->type = REQ_READAHEAD;	1018	req->type = EIO_READAHEAD;
1106	req->fh = newSVsv (fh);	1019	req->sv1 = newSVsv (fh);
1107	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1020	req->int1 = fd;
1108	req->offset = offset;	1021	req->offs = offset;
1109	req->length = length;	1022	req->size = length;
1110		1023
1111	REQ_SEND;	1024	REQ_SEND;
1112	}	1025	}
1113		1026
1114	void	1027	void
1115	aio_stat (fh_or_path,callback=&PL_sv_undef)	1028	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1116	SV * fh_or_path
1117	SV * callback
1118	ALIAS:	1029	ALIAS:
1119	aio_stat = REQ_STAT	1030	aio_stat = EIO_STAT
1120	aio_lstat = REQ_LSTAT	1031	aio_lstat = EIO_LSTAT
		1032	aio_statvfs = EIO_STATVFS
1121	PPCODE:	1033	PPCODE:
1122	{	1034	{
1123	dREQ;	1035	dREQ;
1124		1036
1125	New (0, req->statdata, 1, Stat_t);	1037	req->sv1 = newSVsv (fh_or_path);
1126	if (!req->statdata)
1127	{
1128	req_free (req);
1129	croak ("out of memory during aio_req->statdata allocation");
1130	}
1131		1038
1132	if (SvPOK (fh_or_path))	1039	if (SvPOK (req->sv1))
1133	{	1040	{
1134	req->type = ix;	1041	req->type = ix;
1135	req->data = newSVsv (fh_or_path);
1136	req->dataptr = SvPVbyte_nolen (req->data);	1042	req->ptr1 = SvPVbyte_nolen (req->sv1);
1137	}	1043	}
1138	else	1044	else
1139	{	1045	{
1140	req->type = REQ_FSTAT;	1046	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1141	req->fh = newSVsv (fh_or_path);
1142	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1047	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1143	}	1048	}
1144		1049
1145	REQ_SEND;	1050	REQ_SEND;
1146	}	1051	}
1147		1052
1148	void	1053	void
		1054	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1055	PPCODE:
		1056	{
		1057	dREQ;
		1058
		1059	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1060	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1061	req->sv1 = newSVsv (fh_or_path);
		1062
		1063	if (SvPOK (req->sv1))
		1064	{
		1065	req->type = EIO_UTIME;
		1066	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1067	}
		1068	else
		1069	{
		1070	req->type = EIO_FUTIME;
		1071	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1072	}
		1073
		1074	REQ_SEND;
		1075	}
		1076
		1077	void
		1078	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1079	PPCODE:
		1080	{
		1081	dREQ;
		1082
		1083	req->sv1 = newSVsv (fh_or_path);
		1084	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1085
		1086	if (SvPOK (req->sv1))
		1087	{
		1088	req->type = EIO_TRUNCATE;
		1089	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1090	}
		1091	else
		1092	{
		1093	req->type = EIO_FTRUNCATE;
		1094	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1095	}
		1096
		1097	REQ_SEND;
		1098	}
		1099
		1100	void
		1101	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1102	ALIAS:
		1103	aio_chmod = EIO_CHMOD
		1104	aio_mkdir = EIO_MKDIR
		1105	PPCODE:
		1106	{
		1107	dREQ;
		1108
		1109	req->int2 = mode;
		1110	req->sv1 = newSVsv (fh_or_path);
		1111
		1112	if (SvPOK (req->sv1))
		1113	{
		1114	req->type = ix;
		1115	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1116	}
		1117	else
		1118	{
		1119	req->type = EIO_FCHMOD;
		1120	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1121	}
		1122
		1123	REQ_SEND;
		1124	}
		1125
		1126	void
		1127	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1128	PPCODE:
		1129	{
		1130	dREQ;
		1131
		1132	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1133	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1134	req->sv1 = newSVsv (fh_or_path);
		1135
		1136	if (SvPOK (req->sv1))
		1137	{
		1138	req->type = EIO_CHOWN;
		1139	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1140	}
		1141	else
		1142	{
		1143	req->type = EIO_FCHOWN;
		1144	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1145	}
		1146
		1147	REQ_SEND;
		1148	}
		1149
		1150	void
		1151	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1152	PPCODE:
		1153	{
		1154	dREQ;
		1155
		1156	req->type = EIO_READDIR;
		1157	req->sv1 = newSVsv (pathname);
		1158	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1159	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1160
		1161	if (flags & EIO_READDIR_DENTS)
		1162	req->int1 |= EIO_READDIR_CUSTOM2;
		1163
		1164	REQ_SEND;
		1165	}
		1166
		1167	void
1149	aio_unlink (pathname,callback=&PL_sv_undef)	1168	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1150	SV * pathname
1151	SV * callback
1152	ALIAS:	1169	ALIAS:
1153	aio_unlink = REQ_UNLINK	1170	aio_unlink = EIO_UNLINK
1154	aio_rmdir = REQ_RMDIR	1171	aio_rmdir = EIO_RMDIR
1155	aio_readdir = REQ_READDIR	1172	aio_readdir = EIO_READDIR
1156	PPCODE:	1173	PPCODE:
1157	{	1174	{
1158	dREQ;	1175	dREQ;
1159		1176
1160	req->type = ix;	1177	req->type = ix;
1161	req->data = newSVsv (pathname);	1178	req->sv1 = newSVsv (pathname);
1162	req->dataptr = SvPVbyte_nolen (req->data);	1179	req->ptr1 = SvPVbyte_nolen (req->sv1);
1163		1180
1164	REQ_SEND;	1181	REQ_SEND;
1165	}	1182	}
1166		1183
1167	void	1184	void
1168	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1185	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1169	SV * oldpath
1170	SV * newpath
1171	SV * callback
1172	ALIAS:	1186	ALIAS:
1173	aio_link = REQ_LINK	1187	aio_link = EIO_LINK
1174	aio_symlink = REQ_SYMLINK	1188	aio_symlink = EIO_SYMLINK
1175	aio_rename = REQ_RENAME	1189	aio_rename = EIO_RENAME
1176	PPCODE:	1190	PPCODE:
1177	{	1191	{
1178	dREQ;	1192	dREQ;
1179		1193
1180	req->type = ix;	1194	req->type = ix;
1181	req->fh = newSVsv (oldpath);	1195	req->sv1 = newSVsv (oldpath);
1182	req->data2ptr = SvPVbyte_nolen (req->fh);	1196	req->ptr1 = SvPVbyte_nolen (req->sv1);
1183	req->data = newSVsv (newpath);	1197	req->sv2 = newSVsv (newpath);
1184	req->dataptr = SvPVbyte_nolen (req->data);	1198	req->ptr2 = SvPVbyte_nolen (req->sv2);
1185		1199
1186	REQ_SEND;	1200	REQ_SEND;
1187	}	1201	}
1188		1202
1189	void	1203	void
1190	aio_sleep (delay,callback=&PL_sv_undef)	1204	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1191	double delay
1192	SV * callback
1193	PPCODE:	1205	PPCODE:
1194	{	1206	{
1195	dREQ;	1207	dREQ;
1196		1208
1197	req->type = REQ_SLEEP;	1209	req->type = EIO_MKNOD;
1198	req->fd = delay < 0. ? 0 : delay;	1210	req->sv1 = newSVsv (pathname);
1199	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1211	req->ptr1 = SvPVbyte_nolen (req->sv1);
1200		1212	req->int2 = (mode_t)mode;
		1213	req->offs = dev;
		1214
1201	REQ_SEND;	1215	REQ_SEND;
1202	}	1216	}
1203		1217
1204	void	1218	void
		1219	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1220	ALIAS:
		1221	aio_mtouch = EIO_MTOUCH
		1222	aio_msync = EIO_MSYNC
		1223	PROTOTYPE: $$$$;$
		1224	PPCODE:
		1225	{
		1226	STRLEN svlen;
		1227	UV len = SvUV (length);
		1228	char *svptr = SvPVbyte (data, svlen);
		1229
		1230	if (offset < 0)
		1231	offset += svlen;
		1232
		1233	if (offset < 0 || offset > svlen)
		1234	croak ("offset outside of scalar");
		1235
		1236	if (!SvOK (length) || len + offset > svlen)
		1237	len = svlen - offset;
		1238
		1239	{
		1240	dREQ;
		1241
		1242	req->type = ix;
		1243	req->size = len;
		1244	req->sv2 = SvREFCNT_inc (data);
		1245	req->ptr2 = (char *)svptr + offset;
		1246	req->int1 = flags;
		1247
		1248	REQ_SEND;
		1249	}
		1250	}
		1251
		1252	void
		1253	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1254	PPCODE:
		1255	{
		1256	dREQ;
		1257
		1258	req->type = EIO_BUSY;
		1259	req->nv1 = delay < 0. ? 0. : delay;
		1260
		1261	REQ_SEND;
		1262	}
		1263
		1264	void
1205	aio_group (callback=&PL_sv_undef)	1265	aio_group (SV *callback=&PL_sv_undef)
1206	SV * callback
1207	PROTOTYPE: ;$	1266	PROTOTYPE: ;$
1208	PPCODE:	1267	PPCODE:
1209	{	1268	{
1210	dREQ;	1269	dREQ;
		1270
1211	req->type = REQ_GROUP;	1271	req->type = EIO_GROUP;
		1272
1212	req_send (req);	1273	req_submit (req);
1213	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1274	XPUSHs (req_sv (req, aio_grp_stash));
1214	}	1275	}
		1276
		1277	void
		1278	aio_nop (SV *callback=&PL_sv_undef)
		1279	ALIAS:
		1280	aio_nop = EIO_NOP
		1281	aio_sync = EIO_SYNC
		1282	PPCODE:
		1283	{
		1284	dREQ;
		1285
		1286	req->type = ix;
		1287
		1288	REQ_SEND;
		1289	}
		1290
		1291	int
		1292	aioreq_pri (int pri = 0)
		1293	PROTOTYPE: ;$
		1294	CODE:
		1295	RETVAL = next_pri;
		1296	if (items > 0)
		1297	{
		1298	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1299	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1300	next_pri = pri;
		1301	}
		1302	OUTPUT:
		1303	RETVAL
		1304
		1305	void
		1306	aioreq_nice (int nice = 0)
		1307	CODE:
		1308	nice = next_pri - nice;
		1309	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1310	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1311	next_pri = nice;
1215		1312
1216	void	1313	void
1217	flush ()	1314	flush ()
1218	PROTOTYPE:	1315	PROTOTYPE:
1219	CODE:	1316	CODE:
1220	while (nreqs)	1317	while (eio_nreqs ())
1221	{	1318	{
1222	poll_wait ();	1319	poll_wait ();
1223	poll_cb ();	1320	poll_cb ();
1224	}	1321	}
1225		1322
1226	void	1323	int
1227	poll()	1324	poll()
1228	PROTOTYPE:	1325	PROTOTYPE:
1229	CODE:	1326	CODE:
1230	if (nreqs)
1231	{
1232	poll_wait ();	1327	poll_wait ();
1233	poll_cb ();	1328	RETVAL = poll_cb ();
1234	}	1329	OUTPUT:
		1330	RETVAL
1235		1331
1236	int	1332	int
1237	poll_fileno()	1333	poll_fileno()
1238	PROTOTYPE:	1334	PROTOTYPE:
1239	CODE:	1335	CODE:
1240	RETVAL = respipe [0];	1336	RETVAL = s_epipe_fd (&respipe);
1241	OUTPUT:	1337	OUTPUT:
1242	RETVAL	1338	RETVAL
1243		1339
1244	int	1340	int
1245	poll_cb(...)	1341	poll_cb(...)
…		…
1251		1347
1252	void	1348	void
1253	poll_wait()	1349	poll_wait()
1254	PROTOTYPE:	1350	PROTOTYPE:
1255	CODE:	1351	CODE:
1256	if (nreqs)
1257	poll_wait ();	1352	poll_wait ();
1258		1353
1259	int	1354	int
1260	nreqs()	1355	nreqs()
1261	PROTOTYPE:	1356	PROTOTYPE:
1262	CODE:	1357	CODE:
1263	RETVAL = nreqs;	1358	RETVAL = eio_nreqs ();
1264	OUTPUT:	1359	OUTPUT:
1265	RETVAL	1360	RETVAL
1266		1361
		1362	int
		1363	nready()
		1364	PROTOTYPE:
		1365	CODE:
		1366	RETVAL = eio_nready ();
		1367	OUTPUT:
		1368	RETVAL
		1369
		1370	int
		1371	npending()
		1372	PROTOTYPE:
		1373	CODE:
		1374	RETVAL = eio_npending ();
		1375	OUTPUT:
		1376	RETVAL
		1377
		1378	int
		1379	nthreads()
		1380	PROTOTYPE:
		1381	CODE:
		1382	RETVAL = eio_nthreads ();
		1383	OUTPUT:
		1384	RETVAL
		1385
		1386	int
		1387	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1388	PROTOTYPE: $$$$
		1389	CODE:
		1390	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1391	RETVAL = posix_fadvise (fh, offset, length, advice);
		1392	#else
		1393	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1394	#endif
		1395	OUTPUT:
		1396	RETVAL
		1397
		1398	ssize_t
		1399	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1400	PROTOTYPE: $$$$
		1401	CODE:
		1402	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1403	OUTPUT:
		1404	RETVAL
		1405
		1406	void
		1407	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1408	PROTOTYPE: $$$$$;$
		1409	PPCODE:
		1410	sv_unmagic (scalar, MMAP_MAGIC);
		1411	{
		1412	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1413	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1414	if (addr == (void *)-1)
		1415	XSRETURN_NO;
		1416
		1417	sv_force_normal (scalar);
		1418
		1419	/* we store the length in mg_obj, as namlen is I32 :/ */
		1420	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1421	->mg_obj = (SV *)length;
		1422
		1423	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1424
		1425	if (!(prot & PROT_WRITE))
		1426	SvREADONLY_on (scalar);
		1427
		1428	if (SvLEN (scalar))
		1429	Safefree (SvPVX (scalar));
		1430
		1431	SvPVX (scalar) = (char *)addr;
		1432	SvCUR_set (scalar, length);
		1433	SvLEN_set (scalar, 0);
		1434	SvPOK_only (scalar);
		1435
		1436	XSRETURN_YES;
		1437	}
		1438
		1439	void
		1440	munmap (SV *scalar)
		1441	PROTOTYPE: $
		1442	CODE:
		1443	sv_unmagic (scalar, MMAP_MAGIC);
		1444
		1445	int
		1446	madvise (SV *scalar, off_t offset, off_t length, IV advice)
		1447	PROTOTYPE: $$$$
		1448	CODE:
		1449	{
		1450	char *addr = SvPV_nolen (scalar) + offset;
		1451
		1452	if (!SvOK (ST (2)))
		1453	length = SvCUR (scalar) - offset;
		1454
		1455	if (addr >= SvEND (scalar) || length <= 0)
		1456	XSRETURN_EMPTY;
		1457
		1458	#if _XOPEN_SOURCE >= 600 && !NO_MADVISE
		1459	RETVAL = posix_madvise (addr, length, advice);
		1460	#else
		1461	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1462	#endif
		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
1267	PROTOTYPES: DISABLE	1502	PROTOTYPES: DISABLE
1268		1503
1269	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1504	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1270		1505
1271	void	1506	void
1272	cancel (aio_req_ornot req)	1507	cancel (aio_req_ornot req)
1273	PROTOTYPE:
1274	CODE:	1508	CODE:
1275	req_cancel (req);	1509	eio_cancel (req);
		1510
		1511	void
		1512	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1513	PPCODE:
		1514	{
		1515	if (GIMME_V != G_VOID)
		1516	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		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	}
1276		1526
1277	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1278		1528
1279	void	1529	void
1280	add (aio_req grp, ...)	1530	add (aio_req grp, ...)
1281	PPCODE:	1531	PPCODE:
1282	{	1532	{
1283	int i;	1533	int i;
1284	aio_req req;
1285		1534
1286	if (grp->fd == 2)	1535	if (grp->int1 == 2)
1287	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1536	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1288		1537
1289	for (i = 1; i < items; ++i )	1538	for (i = 1; i < items; ++i )
1290	{	1539	{
		1540	aio_req req;
		1541
1291	if (GIMME_V != G_VOID)	1542	if (GIMME_V != G_VOID)
1292	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1543	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1293		1544
1294	req = SvAIO_REQ (ST (i));	1545	req = SvAIO_REQ (ST (i));
1295		1546
1296	if (req)	1547	if (req)
1297	{	1548	eio_grp_add (grp, req);
1298	++grp->length;
1299	req->grp = grp;
1300
1301	req->grp_prev = 0;
1302	req->grp_next = grp->grp_first;
1303
1304	if (grp->grp_first)
1305	grp->grp_first->grp_prev = req;
1306
1307	grp->grp_first = req;
1308	}
1309	}	1549	}
1310	}	1550	}
		1551
		1552	void
		1553	cancel_subs (aio_req_ornot req)
		1554	CODE:
		1555	req_cancel_subs (req);
1311		1556
1312	void	1557	void
1313	result (aio_req grp, ...)	1558	result (aio_req grp, ...)
1314	CODE:	1559	CODE:
1315	{	1560	{
1316	int i;	1561	int i;
		1562	AV *av;
		1563
		1564	grp->errorno = errno;
		1565
1317	AV *av = newAV ();	1566	av = newAV ();
		1567	av_extend (av, items - 1);
1318		1568
1319	for (i = 1; i < items; ++i )	1569	for (i = 1; i < items; ++i )
1320	av_push (av, newSVsv (ST (i)));	1570	av_push (av, newSVsv (ST (i)));
1321		1571
1322	SvREFCNT_dec (grp->data);	1572	SvREFCNT_dec (grp->sv1);
1323	grp->data = (SV *)av;	1573	grp->sv1 = (SV *)av;
1324	}	1574	}
1325		1575
1326	void	1576	void
1327	lock (aio_req grp)	1577	errno (aio_req grp, int errorno = errno)
1328	CODE:	1578	CODE:
1329	++grp->length;	1579	grp->errorno = errorno;
1330		1580
1331	void	1581	void
1332	unlock (aio_req grp)
1333	CODE:
1334	aio_grp_dec (grp);
1335
1336	void
1337	feeder_limit (aio_req grp, int limit)	1582	limit (aio_req grp, int limit)
1338	CODE:	1583	CODE:
1339	grp->fd2 = limit;	1584	eio_grp_limit (grp, limit);
1340	aio_grp_feed (grp);
1341		1585
1342	void	1586	void
1343	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1587	feed (aio_req grp, SV *callback=&PL_sv_undef)
1344	CODE:	1588	CODE:
1345	{	1589	{
1346	SvREFCNT_dec (grp->fh2);	1590	SvREFCNT_dec (grp->sv2);
1347	grp->fh2 = newSVsv (callback);	1591	grp->sv2 = newSVsv (callback);
		1592	grp->feed = aio_grp_feed;
1348		1593
1349	if (grp->fd2 <= 0)	1594	if (grp->int2 <= 0)
1350	grp->fd2 = 2;	1595	grp->int2 = 2;
1351		1596
1352	aio_grp_feed (grp);	1597	eio_grp_limit (grp, grp->int2);
1353	}	1598	}
1354		1599

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