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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.62 by root, Mon Oct 23 22:45:18 2006 UTC vs.
Revision 1.167 by root, Sun May 9 20:49:52 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 ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	#ifndef MAP_ANONYMOUS
		184	# ifdef MAP_ANON
		185	# define MAP_ANONYMOUS MAP_ANON
34	# else	186	# else
35	# error sendfile support requested but not available	187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	188	# endif
37	#endif	189	#endif
38		190	#ifndef MAP_HUGETLB
39	/* used for struct dirent, AIX doesn't provide it */	191	# define MAP_HUGETLB 0
40	#ifndef NAME_MAX
41	# define NAME_MAX 4096
42	#endif	192	#endif
43		193	#ifndef MAP_LOCKED
44	#if __ia64	194	# define MAP_LOCKED 0
45	# define STACKSIZE 65536
46	#else
47	# define STACKSIZE 8192
48	#endif	195	#endif
		196	#ifndef MAP_NORESERVE
		197	# define MAP_NORESERVE 0
		198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
		205
		206	#ifndef PAGESIZE
		207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
		209
		210	static int req_invoke (eio_req *req);
		211	#define EIO_FINISH(req) req_invoke (req)
		212	static void req_destroy (eio_req *grp);
		213	#define EIO_DESTROY(req) req_destroy (req)
49		214
50	enum {	215	enum {
51	REQ_QUIT,	216	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	};	217	};
63		218
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	219	#include "libeio/eio.c"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		220
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;	221	typedef eio_req *aio_req;
97	typedef aio_cb *aio_req_ornot;	222	typedef eio_req *aio_req_ornot;
98		223
99	enum {	224	static SV *on_next_submit;
100	PRI_MIN = -4,	225	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;	226	static int max_outstanding;
112	static int respipe [2];
113		227
114	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	228	static s_epipe respipe;
115	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
116	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
117		229
118	static volatile aio_req reqs, reqe; /* queue start, queue end */	230	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);	231	static void req_cancel (aio_req req);
122	static void req_free (aio_req req);	232
		233	static void want_poll (void)
		234	{
		235	/* write a dummy byte to the pipe so fh becomes ready */
		236	s_epipe_signal (&respipe);
		237	}
		238
		239	static void done_poll (void)
		240	{
		241	/* read any signals sent by the worker threads */
		242	s_epipe_drain (&respipe);
		243	}
123		244
124	/* must be called at most once */	245	/* must be called at most once */
125	static SV *req_sv (aio_req req, const char *klass)	246	static SV *req_sv (aio_req req, HV *stash)
126	{	247	{
127	if (!req->self)	248	if (!req->self)
128	{	249	{
129	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
130	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
131	}	252	}
132		253
133	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
134	}	255	}
135		256
136	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
137	{	258	{
138	MAGIC *mg;	259	MAGIC *mg;
139		260
140	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	261	if (!SvROK (sv)
		262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		263	&& SvSTASH (SvRV (sv)) != aio_req_stash
		264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
141	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
142		266
143	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
144		268
145	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
146	}	270	}
147		271
148	static void aio_grp_feed (aio_req grp)	272	static void aio_grp_feed (aio_req grp)
149	{	273	{
150	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	274	if (grp->sv2 && SvOK (grp->sv2))
151	{	275	{
152	int old_len = grp->length;	276	dSP;
153		277
154	if (grp->fh2 && SvOK (grp->fh2))	278	ENTER;
		279	SAVETMPS;
		280	PUSHMARK (SP);
		281	XPUSHs (req_sv (grp, aio_grp_stash));
		282	PUTBACK;
		283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		284	SPAGAIN;
		285	FREETMPS;
		286	LEAVE;
		287	}
		288	}
		289
		290	static void req_submit (eio_req *req)
		291	{
		292	eio_submit (req);
		293
		294	if (expect_false (on_next_submit))
		295	{
		296	dSP;
		297	SV *cb = sv_2mortal (on_next_submit);
		298
		299	on_next_submit = 0;
		300
		301	PUSHMARK (SP);
		302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
		304	}
		305	}
		306
		307	static int req_invoke (eio_req *req)
		308	{
		309	if (req->flags & FLAG_SV2_RO_OFF)
		310	SvREADONLY_off (req->sv2);
		311
		312	if (!EIO_CANCELLED (req) && req->callback)
		313	{
		314	dSP;
		315	static SV *sv_result_cache; /* caches the result integer SV */
		316	SV *sv_result;
		317
		318	ENTER;
		319	SAVETMPS;
		320	PUSHMARK (SP);
		321	EXTEND (SP, 1);
		322
		323	/* do not recreate the result IV from scratch each time */
		324	if (expect_true (sv_result_cache))
155	{	325	{
156	dSP;	326	sv_result = sv_result_cache; sv_result_cache = 0;
157		327	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	}	328	}
168		329	else
169	/* stop if no progress has been made */
170	if (old_len == grp->length)
171	{	330	{
172	SvREFCNT_dec (grp->fh2);	331	sv_result = newSViv (req->result);
173	grp->fh2 = 0;	332	SvREADONLY_on (sv_result);
174	break;
175	}	333	}
		334
		335	switch (req->type)
		336	{
		337	case EIO_READDIR:
		338	{
		339	SV *rv = &PL_sv_undef;
		340
		341	if (req->result >= 0)
		342	{
		343	int i;
		344	char *names = (char *)req->ptr2;
		345	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		346	AV *av = newAV ();
		347
		348	av_extend (av, req->result - 1);
		349
		350	for (i = 0; i < req->result; ++i)
		351	{
		352	if (req->int1 & EIO_READDIR_DENTS)
		353	{
		354	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		355
		356	if (req->int1 & EIO_READDIR_CUSTOM2)
		357	{
		358	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		359	AV *avent = newAV ();
		360
		361	av_extend (avent, 2);
		362
		363	if (!sv_type [ent->type])
		364	{
		365	sv_type [ent->type] = newSViv (ent->type);
		366	SvREADONLY_on (sv_type [ent->type]);
		367	}
		368
		369	av_store (avent, 0, namesv);
		370	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		371	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		372
		373	av_store (av, i, newRV_noinc ((SV *)avent));
		374	}
		375	else
		376	av_store (av, i, namesv);
		377
		378	++ent;
		379	}
		380	else
		381	{
		382	SV *name = newSVpv (names, 0);
		383	av_store (av, i, name);
		384	names += SvCUR (name) + 1;
		385	}
		386	}
		387
		388	rv = sv_2mortal (newRV_noinc ((SV *)av));
		389	}
		390
		391	PUSHs (rv);
		392
		393	if (req->int1 & EIO_READDIR_CUSTOM1)
		394	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		395	}
		396	break;
		397
		398	case EIO_OPEN:
		399	{
		400	/* convert fd to fh */
		401	SV *fh = &PL_sv_undef;
		402
		403	if (req->result >= 0)
		404	{
		405	GV *gv = (GV *)sv_newmortal ();
		406	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		407	char sym [64];
		408	int symlen;
		409
		410	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		411	gv_init (gv, aio_stash, sym, symlen, 0);
		412
		413	symlen = snprintf (
		414	sym,
		415	sizeof (sym),
		416	"%s&=%d",
		417	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		418	(int)req->result
		419	);
		420
		421	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		422	fh = (SV *)gv;
		423	}
		424
		425	PUSHs (fh);
		426	}
		427	break;
		428
		429	case EIO_STATVFS:
		430	case EIO_FSTATVFS:
		431	{
		432	SV *rv = &PL_sv_undef;
		433
		434	if (req->result >= 0)
		435	{
		436	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		437	HV *hv = newHV ();
		438
		439	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		440
		441	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		442	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		443	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		444	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		445	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		446	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		447	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		448	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		449	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		450	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		451	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		452	}
		453
		454	PUSHs (rv);
		455	}
		456
		457	break;
		458
		459	case EIO_GROUP:
		460	req->int1 = 2; /* mark group as finished */
		461
		462	if (req->sv1)
		463	{
		464	int i;
		465	AV *av = (AV *)req->sv1;
		466
		467	EXTEND (SP, AvFILL (av) + 1);
		468	for (i = 0; i <= AvFILL (av); ++i)
		469	PUSHs (*av_fetch (av, i, 0));
		470	}
		471	break;
		472
		473	case EIO_NOP:
		474	case EIO_BUSY:
		475	break;
		476
		477	case EIO_READLINK:
		478	if (req->result > 0)
		479	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		480	break;
		481
		482	case EIO_STAT:
		483	case EIO_LSTAT:
		484	case EIO_FSTAT:
		485	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		486	PL_laststatval = req->result;
		487	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		488	PUSHs (sv_result);
		489	break;
		490
		491	case EIO_READ:
		492	{
		493	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		494	*SvEND (req->sv2) = 0;
		495	SvPOK_only (req->sv2);
		496	SvSETMAGIC (req->sv2);
		497	PUSHs (sv_result);
		498	}
		499	break;
		500
		501	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		502	if (req->result > 0)
		503	SvIV_set (sv_result, 0);
		504	/* FALLTHROUGH */
		505
		506	default:
		507	PUSHs (sv_result);
		508	break;
		509	}
		510
		511	errno = req->errorno;
		512
		513	PUTBACK;
		514	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		515	SPAGAIN;
		516
		517	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		518	SvREFCNT_dec (sv_result);
		519	else
		520	sv_result_cache = sv_result;
		521
		522	FREETMPS;
		523	LEAVE;
		524
		525	PUTBACK;
176	}	526	}
177	}
178		527
179	static void aio_grp_dec (aio_req grp)	528	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	}	529	}
193		530
194	static void poll_wait ()
195	{
196	fd_set rfd;
197
198	while (nreqs)
199	{
200	aio_req req;
201	pthread_mutex_lock (&reslock);
202	req = ress;
203	pthread_mutex_unlock (&reslock);
204
205	if (req)
206	return;
207
208	FD_ZERO(&rfd);
209	FD_SET(respipe [0], &rfd);
210
211	select (respipe [0] + 1, &rfd, 0, 0, 0);
212	}
213	}
214
215	static void req_invoke (aio_req req)
216	{
217	dSP;
218	int errorno = errno;
219
220	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
221	return;
222
223	errno = req->errorno;
224
225	ENTER;
226	SAVETMPS;
227	PUSHMARK (SP);
228	EXTEND (SP, 1);
229
230	switch (req->type)
231	{
232	case REQ_READDIR:
233	{
234	SV *rv = &PL_sv_undef;
235
236	if (req->result >= 0)
237	{
238	char *buf = req->data2ptr;
239	AV *av = newAV ();
240
241	while (req->result)
242	{
243	SV *sv = newSVpv (buf, 0);
244
245	av_push (av, sv);
246	buf += SvCUR (sv) + 1;
247	req->result--;
248	}
249
250	rv = sv_2mortal (newRV_noinc ((SV *)av));
251	}
252
253	PUSHs (rv);
254	}
255	break;
256
257	case REQ_OPEN:
258	{
259	/* convert fd to fh */
260	SV *fh;
261
262	PUSHs (sv_2mortal (newSViv (req->result)));
263	PUTBACK;
264	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
265	SPAGAIN;
266
267	fh = SvREFCNT_inc (POPs);
268
269	PUSHMARK (SP);
270	XPUSHs (sv_2mortal (fh));
271	}
272	break;
273
274	case REQ_GROUP:
275	req->fd = 2; /* mark group as finished */
276
277	if (req->data)
278	{
279	int i;
280	AV *av = (AV *)req->data;
281
282	EXTEND (SP, AvFILL (av) + 1);
283	for (i = 0; i <= AvFILL (av); ++i)
284	PUSHs (*av_fetch (av, i, 0));
285	}
286	break;
287
288	case REQ_NOP:
289	case REQ_SLEEP:
290	break;
291
292	default:
293	PUSHs (sv_2mortal (newSViv (req->result)));
294	break;
295	}
296
297
298	PUTBACK;
299	call_sv (req->callback, G_VOID | G_EVAL);
300	SPAGAIN;
301
302	FREETMPS;
303	LEAVE;
304
305	errno = errorno;
306
307	if (SvTRUE (ERRSV))
308	{
309	req_free (req);
310	croak (0);
311	}
312	}
313
314	static void req_free (aio_req req)	531	static void req_destroy (aio_req req)
315	{	532	{
316	if (req->grp)
317	{
318	aio_req grp = req->grp;
319
320	/* unlink request */
321	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
322	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
323
324	if (grp->grp_first == req)
325	grp->grp_first = req->grp_next;
326
327	aio_grp_dec (grp);
328	}
329
330	if (req->self)	533	if (req->self)
331	{	534	{
332	sv_unmagic (req->self, PERL_MAGIC_ext);	535	sv_unmagic (req->self, PERL_MAGIC_ext);
333	SvREFCNT_dec (req->self);	536	SvREFCNT_dec (req->self);
334	}	537	}
335		538
336	SvREFCNT_dec (req->data);
337	SvREFCNT_dec (req->fh);	539	SvREFCNT_dec (req->sv1);
338	SvREFCNT_dec (req->fh2);	540	SvREFCNT_dec (req->sv2);
339	SvREFCNT_dec (req->callback);	541	SvREFCNT_dec (req->callback);
340	Safefree (req->statdata);
341
342	if (req->type == REQ_READDIR && req->result >= 0)
343	free (req->data2ptr);
344		542
345	Safefree (req);	543	Safefree (req);
346	}	544	}
347		545
348	static void req_cancel (aio_req req)	546	static void req_cancel_subs (aio_req grp)
349	{	547	{
350	req->flags |= FLAG_CANCELLED;	548	aio_req sub;
351		549
352	if (req->type == REQ_GROUP)	550	if (grp->type != EIO_GROUP)
		551	return;
		552
		553	SvREFCNT_dec (grp->sv2);
		554	grp->sv2 = 0;
		555
		556	eio_grp_cancel (grp);
		557	}
		558
		559	static void
		560	create_respipe (void)
		561	{
		562	if (s_epipe_renew (&respipe))
		563	croak ("IO::AIO: unable to initialize result pipe");
		564	}
		565
		566	static void poll_wait (void)
		567	{
		568	while (eio_nreqs ())
353	{	569	{
354	aio_req sub;	570	int size;
355		571
356	for (sub = req->grp_first; sub; sub = sub->grp_next)	572	X_LOCK (reslock);
357	req_cancel (sub);	573	size = res_queue.size;
		574	X_UNLOCK (reslock);
		575
		576	if (size)
		577	return;
		578
		579	etp_maybe_start_thread ();
		580
		581	s_epipe_wait (&respipe);
358	}	582	}
359	}	583	}
360		584
361	static int poll_cb ()	585	static int poll_cb (void)
362	{	586	{
363	dSP;
364	int count = 0;
365	int do_croak = 0;
366	aio_req req;
367
368	for (;;)	587	for (;;)
369	{	588	{
370	pthread_mutex_lock (&reslock);	589	int res = eio_poll ();
371	req = ress;
372		590
373	if (req)	591	if (res > 0)
374	{
375	ress = req->next;
376
377	if (!ress)
378	{
379	/* read any signals sent by the worker threads */
380	char buf [32];
381	while (read (respipe [0], buf, 32) == 32)
382	;
383
384	rese = 0;
385	}
386	}
387
388	pthread_mutex_unlock (&reslock);
389
390	if (!req)
391	break;	592	croak (0);
392		593
393	--nreqs;	594	if (!max_outstanding || max_outstanding > eio_nreqs ())
		595	return res;
394		596
395	if (req->type == REQ_QUIT)	597	poll_wait ();
396	started--;
397	else if (req->type == REQ_GROUP && req->length)
398	{
399	req->fd = 1; /* mark request as delayed */
400	continue;
401	}
402	else
403	{
404	if (req->type == REQ_READ)
405	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
406
407	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
408	SvREADONLY_off (req->data);
409
410	if (req->statdata)
411	{
412	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
413	PL_laststatval = req->result;
414	PL_statcache = *(req->statdata);
415	}
416
417	req_invoke (req);
418
419	count++;
420	}
421
422	req_free (req);
423	}	598	}
424
425	return count;
426	}	599	}
427		600
428	static void *aio_proc(void *arg);
429
430	static void start_thread (void)	601	static void atfork_child (void)
431	{	602	{
432	sigset_t fullsigset, oldsigset;	603	create_respipe ();
433	pthread_t tid;
434	pthread_attr_t attr;
435
436	pthread_attr_init (&attr);
437	pthread_attr_setstacksize (&attr, STACKSIZE);
438	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
439
440	sigfillset (&fullsigset);
441	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
442
443	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
444	started++;
445
446	sigprocmask (SIG_SETMASK, &oldsigset, 0);
447	}
448
449	static void req_send (aio_req req)
450	{
451	while (started < wanted && nreqs >= started)
452	start_thread ();
453
454	++nreqs;
455
456	pthread_mutex_lock (&reqlock);
457
458	req->next = 0;
459
460	if (reqe)
461	{
462	reqe->next = req;
463	reqe = req;
464	}
465	else
466	reqe = reqs = req;
467
468	pthread_cond_signal (&reqwait);
469	pthread_mutex_unlock (&reqlock);
470
471	if (nreqs > max_outstanding)
472	for (;;)
473	{
474	poll_cb ();
475
476	if (nreqs <= max_outstanding)
477	break;
478
479	poll_wait ();
480	}
481	}
482
483	static void end_thread (void)
484	{
485	aio_req req;
486	Newz (0, req, 1, aio_cb);
487	req->type = REQ_QUIT;
488
489	req_send (req);
490	}
491
492	static void min_parallel (int nthreads)
493	{
494	if (wanted < nthreads)
495	wanted = nthreads;
496	}
497
498	static void max_parallel (int nthreads)
499	{
500	int cur = started;
501
502	if (wanted > nthreads)
503	wanted = nthreads;
504
505	while (cur > wanted)
506	{
507	end_thread ();
508	cur--;
509	}
510
511	while (started > wanted)
512	{
513	poll_wait ();
514	poll_cb ();
515	}
516	}
517
518	static void create_pipe ()
519	{
520	if (pipe (respipe))
521	croak ("unable to initialize result pipe");
522
523	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
524	croak ("cannot set result pipe to nonblocking mode");
525
526	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
527	croak ("cannot set result pipe to nonblocking mode");
528	}	604	}
529		605
530	/*****************************************************************************/	606	/*****************************************************************************/
531	/* work around various missing functions */
532		607
533	#if !HAVE_PREADWRITE	608	#if !_POSIX_MAPPED_FILES
534	# define pread aio_pread	609	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
535	# define pwrite aio_pwrite	610	# define munmap(addr,length) (errno = ENOSYS, -1)
536
537	/*
538	* make our pread/pwrite safe against themselves, but not against
539	* normal read/write by using a mutex. slows down execution a lot,
540	* but that's your problem, not mine.
541	*/
542	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
543
544	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
545	{
546	ssize_t res;
547	off_t ooffset;
548
549	pthread_mutex_lock (&preadwritelock);
550	ooffset = lseek (fd, 0, SEEK_CUR);
551	lseek (fd, offset, SEEK_SET);
552	res = read (fd, buf, count);
553	lseek (fd, ooffset, SEEK_SET);
554	pthread_mutex_unlock (&preadwritelock);
555
556	return res;
557	}
558
559	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
560	{
561	ssize_t res;
562	off_t ooffset;
563
564	pthread_mutex_lock (&preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);
567	res = write (fd, buf, count);
568	lseek (fd, offset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);
570
571	return res;
572	}
573	#endif
574
575	#if !HAVE_FDATASYNC
576	# define fdatasync fsync
577	#endif
578
579	#if !HAVE_READAHEAD
580	# define readahead aio_readahead
581
582	static ssize_t readahead (int fd, off_t offset, size_t count)
583	{
584	char readahead_buf[4096];
585
586	while (count > 0)
587	{
588	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
589
590	pread (fd, readahead_buf, len, offset);
591	offset += len;
592	count -= len;
593	}
594
595	errno = 0;
596	}
597	#endif
598
599	#if !HAVE_READDIR_R
600	# define readdir_r aio_readdir_r
601
602	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
603
604	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
605	{
606	struct dirent *e;
607	int errorno;
608
609	pthread_mutex_lock (&readdirlock);
610
611	e = readdir (dirp);
612	errorno = errno;
613
614	if (e)
615	{
616	*res = ent;
617	strcpy (ent->d_name, e->d_name);
618	}
619	else
620	*res = 0;
621
622	pthread_mutex_unlock (&readdirlock);
623
624	errno = errorno;
625	return e ? 0 : -1;
626	}
627	#endif
628
629	/* sendfile always needs emulation */
630	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
631	{
632	ssize_t res;
633
634	if (!count)
635	return 0;
636
637	#if HAVE_SENDFILE
638	# if __linux
639	res = sendfile (ofd, ifd, &offset, count);
640
641	# elif __freebsd
642	/*
643	* Of course, the freebsd sendfile is a dire hack with no thoughts
644	* wasted on making it similar to other I/O functions.
645	*/
646	{
647	off_t sbytes;
648	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
649
650	if (res < 0 && sbytes)
651	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
652	res = sbytes;
653	}
654
655	# elif __hpux
656	res = sendfile (ofd, ifd, offset, count, 0, 0);
657
658	# elif __solaris
659	{
660	struct sendfilevec vec;
661	size_t sbytes;
662
663	vec.sfv_fd = ifd;
664	vec.sfv_flag = 0;
665	vec.sfv_off = offset;
666	vec.sfv_len = count;
667
668	res = sendfilev (ofd, &vec, 1, &sbytes);
669
670	if (res < 0 && sbytes)
671	res = sbytes;
672	}
673
674	# endif	611	#endif
675	#else
676	res = -1;
677	errno = ENOSYS;
678	#endif
679		612
680	if (res < 0	613	#define MMAP_MAGIC PERL_MAGIC_ext
681	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
682	#if __solaris
683	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
684	#endif
685	)
686	)
687	{
688	/* emulate sendfile. this is a major pain in the ass */
689	char buf[4096];
690	res = 0;
691		614
692	while (count)	615	static int
693	{	616	mmap_free (pTHX_ SV *sv, MAGIC *mg)
694	ssize_t cnt;
695
696	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
697
698	if (cnt <= 0)
699	{
700	if (cnt && !res) res = -1;
701	break;
702	}
703
704	cnt = write (ofd, buf, cnt);
705
706	if (cnt <= 0)
707	{
708	if (cnt && !res) res = -1;
709	break;
710	}
711
712	offset += cnt;
713	res += cnt;
714	count -= cnt;
715	}
716	}
717
718	return res;
719	}
720
721	/* read a full directory */
722	static int scandir_ (const char *path, void **namesp)
723	{	617	{
724	DIR *dirp = opendir (path);	618	int old_errno = errno;
725	union	619	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
726	{
727	struct dirent d;
728	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
729	} u;
730	struct dirent *entp;
731	char *name, *names;
732	int memlen = 4096;
733	int memofs = 0;
734	int res = 0;
735	int errorno;
736
737	if (!dirp)
738	return -1;
739
740	names = malloc (memlen);
741
742	for (;;)
743	{
744	errno = 0, readdir_r (dirp, &u.d, &entp);
745
746	if (!entp)
747	break;
748
749	name = entp->d_name;
750
751	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
752	{
753	int len = strlen (name) + 1;
754
755	res++;
756
757	while (memofs + len > memlen)
758	{
759	memlen *= 2;
760	names = realloc (names, memlen);
761	if (!names)
762	break;
763	}
764
765	memcpy (names + memofs, name, len);
766	memofs += len;
767	}
768	}
769
770	errorno = errno;	620	errno = old_errno;
771	closedir (dirp);
772		621
773	if (errorno)	622	mg->mg_obj = 0; /* just in case */
774	{
775	free (names);
776	errno = errorno;
777	res = -1;
778	}
779		623
780	*namesp = (void *)names;	624	SvREADONLY_off (sv);
		625	SvCUR_set (sv, 0);
		626	SvLEN_set (sv, 0);
		627	SvPVX (sv) = 0;
		628	SvOK_off (sv);
		629
781	return res;	630	return 0;
782	}	631	}
		632
		633	static MGVTBL mmap_vtbl = {
		634	0, 0, 0, 0, mmap_free
		635	};
783		636
784	/*****************************************************************************/	637	/*****************************************************************************/
785		638
786	static void *aio_proc (void *thr_arg)	639	static SV *
		640	get_cb (SV *cb_sv)
787	{	641	{
788	aio_req req;	642	SvGETMAGIC (cb_sv);
789	int type;	643	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
790
791	do
792	{
793	pthread_mutex_lock (&reqlock);
794
795	for (;;)
796	{
797	req = reqs;
798
799	if (reqs)
800	{
801	reqs = reqs->next;
802	if (!reqs) reqe = 0;
803	}
804
805	if (req)
806	break;
807
808	pthread_cond_wait (&reqwait, &reqlock);
809	}
810
811	pthread_mutex_unlock (&reqlock);
812
813	errno = 0; /* strictly unnecessary */
814	type = req->type; /* remember type for QUIT check */
815
816	if (!(req->flags & FLAG_CANCELLED))
817	switch (type)
818	{
819	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
820	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
821
822	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
823	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
824
825	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
826	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
827	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
828
829	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
830	case REQ_CLOSE: req->result = close (req->fd); break;
831	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
832	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
833	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
834	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
835	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
836
837	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
838	case REQ_FSYNC: req->result = fsync (req->fd); break;
839	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
840
841	case REQ_SLEEP:
842	{
843	struct timeval tv;
844
845	tv.tv_sec = req->fd;
846	tv.tv_usec = req->fd2;
847
848	req->result = select (0, 0, 0, 0, &tv);
849	}
850
851	case REQ_GROUP:
852	case REQ_NOP:
853	case REQ_QUIT:
854	break;
855
856	default:
857	req->result = ENOSYS;
858	break;
859	}
860
861	req->errorno = errno;
862
863	pthread_mutex_lock (&reslock);
864
865	req->next = 0;
866
867	if (rese)
868	{
869	rese->next = req;
870	rese = req;
871	}
872	else
873	{
874	rese = ress = req;
875
876	/* write a dummy byte to the pipe so fh becomes ready */
877	write (respipe [1], &respipe, 1);
878	}
879
880	pthread_mutex_unlock (&reslock);
881	}
882	while (type != REQ_QUIT);
883
884	return 0;
885	}
886
887	/*****************************************************************************/
888
889	static void atfork_prepare (void)
890	{
891	pthread_mutex_lock (&reqlock);
892	pthread_mutex_lock (&reslock);
893	#if !HAVE_PREADWRITE
894	pthread_mutex_lock (&preadwritelock);
895	#endif
896	#if !HAVE_READDIR_R
897	pthread_mutex_lock (&readdirlock);
898	#endif
899	}
900
901	static void atfork_parent (void)
902	{
903	#if !HAVE_READDIR_R
904	pthread_mutex_unlock (&readdirlock);
905	#endif
906	#if !HAVE_PREADWRITE
907	pthread_mutex_unlock (&preadwritelock);
908	#endif
909	pthread_mutex_unlock (&reslock);
910	pthread_mutex_unlock (&reqlock);
911	}
912
913	static void atfork_child (void)
914	{
915	aio_req prv;
916
917	started = 0;
918
919	while (reqs)
920	{
921	prv = reqs;
922	reqs = prv->next;
923	req_free (prv);
924	}
925
926	reqs = reqe = 0;
927
928	while (ress)
929	{
930	prv = ress;
931	ress = prv->next;
932	req_free (prv);
933	}
934
935	ress = rese = 0;
936
937	close (respipe [0]);
938	close (respipe [1]);
939	create_pipe ();
940
941	atfork_parent ();
942	}	644	}
943		645
944	#define dREQ \	646	#define dREQ \
		647	SV *cb_cv; \
945	aio_req req; \	648	aio_req req; \
946	int req_pri = next_pri; \	649	int req_pri = next_pri; \
947	next_pri = DEFAULT_PRI + PRI_BIAS; \	650	next_pri = EIO_PRI_DEFAULT; \
948	\	651	\
949	if (SvOK (callback) && !SvROK (callback)) \	652	cb_cv = get_cb (callback); \
950	croak ("callback must be undef or of reference type"); \
951	\	653	\
952	Newz (0, req, 1, aio_cb); \	654	Newz (0, req, 1, eio_req); \
953	if (!req) \	655	if (!req) \
954	croak ("out of memory during aio_req allocation"); \	656	croak ("out of memory during eio_req allocation"); \
955	\	657	\
956	req->callback = newSVsv (callback); \	658	req->callback = SvREFCNT_inc (cb_cv); \
957	req->pri = req_pri	659	req->pri = req_pri
958		660
959	#define REQ_SEND \	661	#define REQ_SEND \
		662	PUTBACK; \
960	req_send (req); \	663	req_submit (req); \
		664	SPAGAIN; \
961	\	665	\
962	if (GIMME_V != G_VOID) \	666	if (GIMME_V != G_VOID) \
963	XPUSHs (req_sv (req, AIO_REQ_KLASS));	667	XPUSHs (req_sv (req, aio_req_stash));
964		668
965	MODULE = IO::AIO PACKAGE = IO::AIO	669	MODULE = IO::AIO PACKAGE = IO::AIO
966		670
967	PROTOTYPES: ENABLE	671	PROTOTYPES: ENABLE
968		672
969	BOOT:	673	BOOT:
970	{	674	{
		675	static const struct {
		676	const char *name;
		677	IV iv;
		678	} *civ, const_iv[] = {
		679	# define const_niv(name, value) { # name, (IV) value },
		680	# define const_iv(name) { # name, (IV) name },
		681	# define const_eio(name) { # name, (IV) EIO_ ## name },
		682	const_iv (EXDEV)
		683	const_iv (ENOSYS)
		684	const_iv (O_RDONLY)
		685	const_iv (O_WRONLY)
		686	const_iv (O_RDWR)
		687	const_iv (O_CREAT)
		688	const_iv (O_TRUNC)
		689	const_iv (O_EXCL)
		690	const_iv (O_APPEND)
		691	#ifndef _WIN32
		692	const_iv (S_IFIFO)
		693	#endif
		694	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		695	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		696	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		697	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		698	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		699	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		700
		701	const_iv (ST_RDONLY)
		702	const_iv (ST_NOSUID)
		703	const_iv (ST_NODEV)
		704	const_iv (ST_NOEXEC)
		705	const_iv (ST_SYNCHRONOUS)
		706	const_iv (ST_MANDLOCK)
		707	const_iv (ST_WRITE)
		708	const_iv (ST_APPEND)
		709	const_iv (ST_IMMUTABLE)
		710	const_iv (ST_NOATIME)
		711	const_iv (ST_NODIRATIME)
		712	const_iv (ST_RELATIME)
		713
		714	const_iv (PROT_EXEC)
		715	const_iv (PROT_NONE)
		716	const_iv (PROT_READ)
		717	const_iv (PROT_WRITE)
		718
		719	/*const_iv (MAP_FIXED)*/
		720	const_iv (MAP_PRIVATE)
		721	const_iv (MAP_SHARED)
		722	const_iv (MAP_ANONYMOUS)
		723
		724	/* linuxish */
		725	const_iv (MAP_HUGETLB)
		726	const_iv (MAP_LOCKED)
		727	const_iv (MAP_NORESERVE)
		728	const_iv (MAP_POPULATE)
		729	const_iv (MAP_NONBLOCK)
		730
		731	const_iv (MCL_FUTURE)
		732	const_iv (MCL_CURRENT)
		733
		734	const_eio (MS_ASYNC)
		735	const_eio (MS_INVALIDATE)
		736	const_eio (MS_SYNC)
		737
		738	const_eio (MT_MODIFY)
		739
		740	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		741	const_eio (SYNC_FILE_RANGE_WRITE)
		742	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		743
		744	const_eio (READDIR_DENTS)
		745	const_eio (READDIR_DIRS_FIRST)
		746	const_eio (READDIR_STAT_ORDER)
		747	const_eio (READDIR_FOUND_UNKNOWN)
		748
		749	const_eio (DT_UNKNOWN)
		750	const_eio (DT_FIFO)
		751	const_eio (DT_CHR)
		752	const_eio (DT_DIR)
		753	const_eio (DT_BLK)
		754	const_eio (DT_REG)
		755	const_eio (DT_LNK)
		756	const_eio (DT_SOCK)
		757	const_eio (DT_WHT)
		758	};
		759
971	HV *stash = gv_stashpv ("IO::AIO", 1);	760	aio_stash = gv_stashpv ("IO::AIO" , 1);
972	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	761	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
973	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	762	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
974	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
975		763
		764	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		765	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		766
		767	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		768
976	create_pipe ();	769	create_respipe ();
977	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
978	}
979		770
		771	if (eio_init (want_poll, done_poll) < 0)
		772	croak ("IO::AIO: unable to initialise eio library");
		773
		774	/* atfork child called in fifo order, so before eio's handler */
		775	X_THREAD_ATFORK (0, 0, atfork_child);
		776	}
		777
980	void	778	void
981	min_parallel (nthreads)	779	max_poll_reqs (int nreqs)
982	int nthreads
983	PROTOTYPE: $	780	PROTOTYPE: $
		781	CODE:
		782	eio_set_max_poll_reqs (nreqs);
984		783
985	void	784	void
986	max_parallel (nthreads)	785	max_poll_time (double nseconds)
987	int nthreads
988	PROTOTYPE: $	786	PROTOTYPE: $
989
990	int
991	max_outstanding (nreqs)
992	int nreqs
993	PROTOTYPE: $
994	CODE:	787	CODE:
995	RETVAL = max_outstanding;	788	eio_set_max_poll_time (nseconds);
		789
		790	void
		791	min_parallel (int nthreads)
		792	PROTOTYPE: $
		793	CODE:
		794	eio_set_min_parallel (nthreads);
		795
		796	void
		797	max_parallel (int nthreads)
		798	PROTOTYPE: $
		799	CODE:
		800	eio_set_max_parallel (nthreads);
		801
		802	void
		803	max_idle (int nthreads)
		804	PROTOTYPE: $
		805	CODE:
		806	eio_set_max_idle (nthreads);
		807
		808	void
		809	max_outstanding (int maxreqs)
		810	PROTOTYPE: $
		811	CODE:
996	max_outstanding = nreqs;	812	max_outstanding = maxreqs;
997		813
998	void	814	void
999	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	815	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1000	SV * pathname
1001	int flags
1002	int mode
1003	SV * callback
1004	PROTOTYPE: $$$;$	816	PROTOTYPE: $$$;$
1005	PPCODE:	817	PPCODE:
1006	{	818	{
1007	dREQ;	819	dREQ;
1008		820
1009	req->type = REQ_OPEN;	821	req->type = EIO_OPEN;
1010	req->data = newSVsv (pathname);	822	req->sv1 = newSVsv (pathname);
1011	req->dataptr = SvPVbyte_nolen (req->data);	823	req->ptr1 = SvPVbyte_nolen (req->sv1);
1012	req->fd = flags;	824	req->int1 = flags;
1013	req->mode = mode;	825	req->int2 = mode;
1014		826
1015	REQ_SEND;	827	REQ_SEND;
1016	}	828	}
1017		829
1018	void	830	void
1019	aio_close (fh,callback=&PL_sv_undef)	831	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1020	SV * fh
1021	SV * callback
1022	PROTOTYPE: $;$	832	PROTOTYPE: $;$
1023	ALIAS:	833	ALIAS:
1024	aio_close = REQ_CLOSE
1025	aio_fsync = REQ_FSYNC	834	aio_fsync = EIO_FSYNC
1026	aio_fdatasync = REQ_FDATASYNC	835	aio_fdatasync = EIO_FDATASYNC
1027	PPCODE:	836	PPCODE:
1028	{	837	{
		838	int fd = s_fileno_croak (fh, 0);
1029	dREQ;	839	dREQ;
1030		840
1031	req->type = ix;	841	req->type = ix;
1032	req->fh = newSVsv (fh);	842	req->sv1 = newSVsv (fh);
1033	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	843	req->int1 = fd;
1034		844
1035	REQ_SEND (req);	845	REQ_SEND (req);
1036	}	846	}
1037		847
1038	void	848	void
		849	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		850	PROTOTYPE: $$$$;$
		851	PPCODE:
		852	{
		853	int fd = s_fileno_croak (fh, 0);
		854	dREQ;
		855
		856	req->type = EIO_SYNC_FILE_RANGE;
		857	req->sv1 = newSVsv (fh);
		858	req->int1 = fd;
		859	req->offs = offset;
		860	req->size = nbytes;
		861	req->int2 = flags;
		862
		863	REQ_SEND (req);
		864	}
		865
		866	void
		867	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		868	PROTOTYPE: $;$
		869	PPCODE:
		870	{
		871	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		872	int fd = s_fileno_croak (fh, 0);
		873	dREQ;
		874
		875	if (close_pipe < 0)
		876	{
		877	int pipefd [2];
		878
		879	if (pipe (pipefd) < 0
		880	|| close (pipefd [1]) < 0
		881	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		882	abort (); /*D*/
		883
		884	close_pipe = pipefd [0];
		885	}
		886
		887	req->type = EIO_DUP2;
		888	req->int1 = close_pipe;
		889	req->sv2 = newSVsv (fh);
		890	req->int2 = fd;
		891
		892	REQ_SEND (req);
		893	}
		894
		895	void
1039	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	896	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1040	SV * fh
1041	UV offset
1042	UV length
1043	SV * data
1044	UV dataoffset
1045	SV * callback
1046	ALIAS:	897	ALIAS:
1047	aio_read = REQ_READ	898	aio_read = EIO_READ
1048	aio_write = REQ_WRITE	899	aio_write = EIO_WRITE
1049	PROTOTYPE: $$$$$;$	900	PROTOTYPE: $$$$$;$
1050	PPCODE:	901	PPCODE:
1051	{	902	{
1052	aio_req req;
1053	STRLEN svlen;	903	STRLEN svlen;
		904	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1054	char *svptr = SvPVbyte (data, svlen);	905	char *svptr = SvPVbyte (data, svlen);
1055		906	UV len = SvUV (length);
1056	SvUPGRADE (data, SVt_PV);
1057	SvPOK_on (data);
1058		907
1059	if (dataoffset < 0)	908	if (dataoffset < 0)
1060	dataoffset += svlen;	909	dataoffset += svlen;
1061		910
1062	if (dataoffset < 0 || dataoffset > svlen)	911	if (dataoffset < 0 || dataoffset > svlen)
1063	croak ("data offset outside of string");	912	croak ("dataoffset outside of data scalar");
1064		913
1065	if (ix == REQ_WRITE)	914	if (ix == EIO_WRITE)
1066	{	915	{
1067	/* write: check length and adjust. */	916	/* write: check length and adjust. */
1068	if (length < 0 || length + dataoffset > svlen)	917	if (!SvOK (length) || len + dataoffset > svlen)
1069	length = svlen - dataoffset;	918	len = svlen - dataoffset;
1070	}	919	}
1071	else	920	else
1072	{	921	{
1073	/* read: grow scalar as necessary */	922	/* read: check type and grow scalar as necessary */
		923	SvUPGRADE (data, SVt_PV);
1074	svptr = SvGROW (data, length + dataoffset);	924	svptr = SvGROW (data, len + dataoffset + 1);
1075	}	925	}
1076
1077	if (length < 0)
1078	croak ("length must not be negative");
1079		926
1080	{	927	{
1081	dREQ;	928	dREQ;
1082		929
1083	req->type = ix;	930	req->type = ix;
1084	req->fh = newSVsv (fh);	931	req->sv1 = newSVsv (fh);
1085	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	932	req->int1 = fd;
1086	: IoOFP (sv_2io (fh)));	933	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1087	req->offset = offset;	934	req->size = len;
1088	req->length = length;
1089	req->data = SvREFCNT_inc (data);	935	req->sv2 = SvREFCNT_inc (data);
1090	req->dataptr = (char *)svptr + dataoffset;	936	req->ptr2 = (char *)svptr + dataoffset;
		937	req->stroffset = dataoffset;
1091		938
1092	if (!SvREADONLY (data))	939	if (!SvREADONLY (data))
1093	{	940	{
1094	SvREADONLY_on (data);	941	SvREADONLY_on (data);
1095	req->data2ptr = (void *)data;	942	req->flags |= FLAG_SV2_RO_OFF;
1096	}	943	}
1097		944
1098	REQ_SEND;	945	REQ_SEND;
1099	}	946	}
1100	}	947	}
1101		948
1102	void	949	void
		950	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		951	PROTOTYPE: $$;$
		952	PPCODE:
		953	{
		954	SV *data;
		955	dREQ;
		956
		957	req->type = EIO_READLINK;
		958	req->sv1 = newSVsv (path);
		959	req->ptr1 = SvPVbyte_nolen (req->sv1);
		960
		961	REQ_SEND;
		962	}
		963
		964	void
1103	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	965	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1104	SV * out_fh
1105	SV * in_fh
1106	UV in_offset
1107	UV length
1108	SV * callback
1109	PROTOTYPE: $$$$;$	966	PROTOTYPE: $$$$;$
1110	PPCODE:	967	PPCODE:
1111	{	968	{
		969	int ifd = s_fileno_croak (in_fh , 0);
		970	int ofd = s_fileno_croak (out_fh, 1);
1112	dREQ;	971	dREQ;
1113		972
1114	req->type = REQ_SENDFILE;	973	req->type = EIO_SENDFILE;
1115	req->fh = newSVsv (out_fh);	974	req->sv1 = newSVsv (out_fh);
1116	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	975	req->int1 = ofd;
1117	req->fh2 = newSVsv (in_fh);	976	req->sv2 = newSVsv (in_fh);
1118	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	977	req->int2 = ifd;
1119	req->offset = in_offset;	978	req->offs = in_offset;
1120	req->length = length;	979	req->size = length;
1121		980
1122	REQ_SEND;	981	REQ_SEND;
1123	}	982	}
1124		983
1125	void	984	void
1126	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	985	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1127	SV * fh
1128	UV offset
1129	IV length
1130	SV * callback
1131	PROTOTYPE: $$$;$	986	PROTOTYPE: $$$;$
1132	PPCODE:	987	PPCODE:
1133	{	988	{
		989	int fd = s_fileno_croak (fh, 0);
1134	dREQ;	990	dREQ;
1135		991
1136	req->type = REQ_READAHEAD;	992	req->type = EIO_READAHEAD;
1137	req->fh = newSVsv (fh);	993	req->sv1 = newSVsv (fh);
1138	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	994	req->int1 = fd;
1139	req->offset = offset;	995	req->offs = offset;
1140	req->length = length;	996	req->size = length;
1141		997
1142	REQ_SEND;	998	REQ_SEND;
1143	}	999	}
1144		1000
1145	void	1001	void
1146	aio_stat (fh_or_path,callback=&PL_sv_undef)	1002	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1147	SV * fh_or_path
1148	SV * callback
1149	ALIAS:	1003	ALIAS:
1150	aio_stat = REQ_STAT	1004	aio_stat = EIO_STAT
1151	aio_lstat = REQ_LSTAT	1005	aio_lstat = EIO_LSTAT
		1006	aio_statvfs = EIO_STATVFS
1152	PPCODE:	1007	PPCODE:
1153	{	1008	{
1154	dREQ;	1009	dREQ;
1155		1010
1156	New (0, req->statdata, 1, Stat_t);	1011	req->sv1 = newSVsv (fh_or_path);
1157	if (!req->statdata)
1158	{
1159	req_free (req);
1160	croak ("out of memory during aio_req->statdata allocation");
1161	}
1162		1012
1163	if (SvPOK (fh_or_path))	1013	if (SvPOK (req->sv1))
1164	{	1014	{
1165	req->type = ix;	1015	req->type = ix;
1166	req->data = newSVsv (fh_or_path);
1167	req->dataptr = SvPVbyte_nolen (req->data);	1016	req->ptr1 = SvPVbyte_nolen (req->sv1);
1168	}	1017	}
1169	else	1018	else
1170	{	1019	{
1171	req->type = REQ_FSTAT;	1020	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1172	req->fh = newSVsv (fh_or_path);
1173	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1021	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1174	}	1022	}
1175		1023
1176	REQ_SEND;	1024	REQ_SEND;
1177	}	1025	}
1178		1026
1179	void	1027	void
		1028	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1029	PPCODE:
		1030	{
		1031	dREQ;
		1032
		1033	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1034	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1035	req->sv1 = newSVsv (fh_or_path);
		1036
		1037	if (SvPOK (req->sv1))
		1038	{
		1039	req->type = EIO_UTIME;
		1040	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1041	}
		1042	else
		1043	{
		1044	req->type = EIO_FUTIME;
		1045	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1046	}
		1047
		1048	REQ_SEND;
		1049	}
		1050
		1051	void
		1052	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1053	PPCODE:
		1054	{
		1055	dREQ;
		1056
		1057	req->sv1 = newSVsv (fh_or_path);
		1058	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1059
		1060	if (SvPOK (req->sv1))
		1061	{
		1062	req->type = EIO_TRUNCATE;
		1063	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1064	}
		1065	else
		1066	{
		1067	req->type = EIO_FTRUNCATE;
		1068	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1069	}
		1070
		1071	REQ_SEND;
		1072	}
		1073
		1074	void
		1075	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1076	ALIAS:
		1077	aio_chmod = EIO_CHMOD
		1078	aio_mkdir = EIO_MKDIR
		1079	PPCODE:
		1080	{
		1081	dREQ;
		1082
		1083	req->int2 = mode;
		1084	req->sv1 = newSVsv (fh_or_path);
		1085
		1086	if (SvPOK (req->sv1))
		1087	{
		1088	req->type = ix;
		1089	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1090	}
		1091	else
		1092	{
		1093	req->type = EIO_FCHMOD;
		1094	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1095	}
		1096
		1097	REQ_SEND;
		1098	}
		1099
		1100	void
		1101	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1102	PPCODE:
		1103	{
		1104	dREQ;
		1105
		1106	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1107	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1108	req->sv1 = newSVsv (fh_or_path);
		1109
		1110	if (SvPOK (req->sv1))
		1111	{
		1112	req->type = EIO_CHOWN;
		1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1114	}
		1115	else
		1116	{
		1117	req->type = EIO_FCHOWN;
		1118	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1119	}
		1120
		1121	REQ_SEND;
		1122	}
		1123
		1124	void
		1125	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1126	PPCODE:
		1127	{
		1128	dREQ;
		1129
		1130	req->type = EIO_READDIR;
		1131	req->sv1 = newSVsv (pathname);
		1132	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1133	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1134
		1135	if (flags & EIO_READDIR_DENTS)
		1136	req->int1 |= EIO_READDIR_CUSTOM2;
		1137
		1138	REQ_SEND;
		1139	}
		1140
		1141	void
1180	aio_unlink (pathname,callback=&PL_sv_undef)	1142	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1181	SV * pathname
1182	SV * callback
1183	ALIAS:	1143	ALIAS:
1184	aio_unlink = REQ_UNLINK	1144	aio_unlink = EIO_UNLINK
1185	aio_rmdir = REQ_RMDIR	1145	aio_rmdir = EIO_RMDIR
1186	aio_readdir = REQ_READDIR	1146	aio_readdir = EIO_READDIR
1187	PPCODE:	1147	PPCODE:
1188	{	1148	{
1189	dREQ;	1149	dREQ;
1190		1150
1191	req->type = ix;	1151	req->type = ix;
1192	req->data = newSVsv (pathname);	1152	req->sv1 = newSVsv (pathname);
1193	req->dataptr = SvPVbyte_nolen (req->data);	1153	req->ptr1 = SvPVbyte_nolen (req->sv1);
1194		1154
1195	REQ_SEND;	1155	REQ_SEND;
1196	}	1156	}
1197		1157
1198	void	1158	void
1199	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1159	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1200	SV * oldpath
1201	SV * newpath
1202	SV * callback
1203	ALIAS:	1160	ALIAS:
1204	aio_link = REQ_LINK	1161	aio_link = EIO_LINK
1205	aio_symlink = REQ_SYMLINK	1162	aio_symlink = EIO_SYMLINK
1206	aio_rename = REQ_RENAME	1163	aio_rename = EIO_RENAME
1207	PPCODE:	1164	PPCODE:
1208	{	1165	{
1209	dREQ;	1166	dREQ;
1210		1167
1211	req->type = ix;	1168	req->type = ix;
1212	req->fh = newSVsv (oldpath);	1169	req->sv1 = newSVsv (oldpath);
1213	req->data2ptr = SvPVbyte_nolen (req->fh);	1170	req->ptr1 = SvPVbyte_nolen (req->sv1);
1214	req->data = newSVsv (newpath);	1171	req->sv2 = newSVsv (newpath);
1215	req->dataptr = SvPVbyte_nolen (req->data);	1172	req->ptr2 = SvPVbyte_nolen (req->sv2);
1216		1173
1217	REQ_SEND;	1174	REQ_SEND;
1218	}	1175	}
1219		1176
1220	void	1177	void
1221	aio_sleep (delay,callback=&PL_sv_undef)	1178	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1222	double delay
1223	SV * callback
1224	PPCODE:	1179	PPCODE:
1225	{	1180	{
1226	dREQ;	1181	dREQ;
1227		1182
1228	req->type = REQ_SLEEP;	1183	req->type = EIO_MKNOD;
1229	req->fd = delay < 0. ? 0 : delay;	1184	req->sv1 = newSVsv (pathname);
1230	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1185	req->ptr1 = SvPVbyte_nolen (req->sv1);
1231		1186	req->int2 = (mode_t)mode;
		1187	req->offs = dev;
		1188
1232	REQ_SEND;	1189	REQ_SEND;
1233	}	1190	}
1234		1191
1235	void	1192	void
		1193	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1194	ALIAS:
		1195	aio_mtouch = EIO_MTOUCH
		1196	aio_msync = EIO_MSYNC
		1197	PROTOTYPE: $$$$;$
		1198	PPCODE:
		1199	{
		1200	STRLEN svlen;
		1201	UV len = SvUV (length);
		1202	char *svptr = SvPVbyte (data, svlen);
		1203
		1204	if (offset < 0)
		1205	offset += svlen;
		1206
		1207	if (offset < 0 || offset > svlen)
		1208	croak ("offset outside of scalar");
		1209
		1210	if (!SvOK (length) || len + offset > svlen)
		1211	len = svlen - offset;
		1212
		1213	{
		1214	dREQ;
		1215
		1216	req->type = ix;
		1217	req->size = len;
		1218	req->sv2 = SvREFCNT_inc (data);
		1219	req->ptr2 = (char *)svptr + offset;
		1220	req->int1 = flags;
		1221
		1222	REQ_SEND;
		1223	}
		1224	}
		1225
		1226	void
		1227	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1228	PPCODE:
		1229	{
		1230	dREQ;
		1231
		1232	req->type = EIO_BUSY;
		1233	req->nv1 = delay < 0. ? 0. : delay;
		1234
		1235	REQ_SEND;
		1236	}
		1237
		1238	void
1236	aio_group (callback=&PL_sv_undef)	1239	aio_group (SV *callback=&PL_sv_undef)
1237	SV * callback
1238	PROTOTYPE: ;$	1240	PROTOTYPE: ;$
1239	PPCODE:	1241	PPCODE:
1240	{	1242	{
1241	dREQ;	1243	dREQ;
1242		1244
1243	req->type = REQ_GROUP;	1245	req->type = EIO_GROUP;
		1246
1244	req_send (req);	1247	req_submit (req);
1245
1246	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1248	XPUSHs (req_sv (req, aio_grp_stash));
1247	}	1249	}
1248		1250
1249	void	1251	void
1250	aio_nop (callback=&PL_sv_undef)	1252	aio_nop (SV *callback=&PL_sv_undef)
1251	SV * callback	1253	ALIAS:
		1254	aio_nop = EIO_NOP
		1255	aio_sync = EIO_SYNC
1252	PPCODE:	1256	PPCODE:
1253	{	1257	{
1254	dREQ;	1258	dREQ;
1255		1259
1256	req->type = REQ_NOP;	1260	req->type = ix;
1257		1261
1258	REQ_SEND;	1262	REQ_SEND;
1259	}	1263	}
1260		1264
1261	#if 0	1265	int
1262		1266	aioreq_pri (int pri = 0)
1263	void	1267	PROTOTYPE: ;$
1264	aio_pri (int pri = DEFAULT_PRI)
1265	CODE:	1268	CODE:
		1269	RETVAL = next_pri;
		1270	if (items > 0)
		1271	{
1266	if (pri < PRI_MIN) pri = PRI_MIN;	1272	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1267	if (pri > PRI_MAX) pri = PRI_MAX;	1273	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1268	next_pri = pri + PRI_BIAS;	1274	next_pri = pri;
		1275	}
		1276	OUTPUT:
		1277	RETVAL
1269		1278
1270	#endif	1279	void
		1280	aioreq_nice (int nice = 0)
		1281	CODE:
		1282	nice = next_pri - nice;
		1283	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1284	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1285	next_pri = nice;
1271		1286
1272	void	1287	void
1273	flush ()	1288	flush ()
1274	PROTOTYPE:	1289	PROTOTYPE:
1275	CODE:	1290	CODE:
1276	while (nreqs)	1291	while (eio_nreqs ())
1277	{	1292	{
1278	poll_wait ();	1293	poll_wait ();
1279	poll_cb ();	1294	poll_cb ();
1280	}	1295	}
1281		1296
1282	void	1297	int
1283	poll()	1298	poll()
1284	PROTOTYPE:	1299	PROTOTYPE:
1285	CODE:	1300	CODE:
1286	if (nreqs)
1287	{
1288	poll_wait ();	1301	poll_wait ();
1289	poll_cb ();	1302	RETVAL = poll_cb ();
1290	}	1303	OUTPUT:
		1304	RETVAL
1291		1305
1292	int	1306	int
1293	poll_fileno()	1307	poll_fileno()
1294	PROTOTYPE:	1308	PROTOTYPE:
1295	CODE:	1309	CODE:
1296	RETVAL = respipe [0];	1310	RETVAL = s_epipe_fd (&respipe);
1297	OUTPUT:	1311	OUTPUT:
1298	RETVAL	1312	RETVAL
1299		1313
1300	int	1314	int
1301	poll_cb(...)	1315	poll_cb(...)
…		…
1307		1321
1308	void	1322	void
1309	poll_wait()	1323	poll_wait()
1310	PROTOTYPE:	1324	PROTOTYPE:
1311	CODE:	1325	CODE:
1312	if (nreqs)
1313	poll_wait ();	1326	poll_wait ();
1314		1327
1315	int	1328	int
1316	nreqs()	1329	nreqs()
1317	PROTOTYPE:	1330	PROTOTYPE:
1318	CODE:	1331	CODE:
1319	RETVAL = nreqs;	1332	RETVAL = eio_nreqs ();
1320	OUTPUT:	1333	OUTPUT:
1321	RETVAL	1334	RETVAL
1322		1335
		1336	int
		1337	nready()
		1338	PROTOTYPE:
		1339	CODE:
		1340	RETVAL = eio_nready ();
		1341	OUTPUT:
		1342	RETVAL
		1343
		1344	int
		1345	npending()
		1346	PROTOTYPE:
		1347	CODE:
		1348	RETVAL = eio_npending ();
		1349	OUTPUT:
		1350	RETVAL
		1351
		1352	int
		1353	nthreads()
		1354	PROTOTYPE:
		1355	CODE:
		1356	RETVAL = eio_nthreads ();
		1357	OUTPUT:
		1358	RETVAL
		1359
		1360	int
		1361	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1362	PROTOTYPE: $$$$
		1363	CODE:
		1364	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1365	RETVAL = posix_fadvise (fh, offset, length, advice);
		1366	#else
		1367	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1368	#endif
		1369	OUTPUT:
		1370	RETVAL
		1371
		1372	ssize_t
		1373	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1374	PROTOTYPE: $$$$
		1375	CODE:
		1376	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1377	OUTPUT:
		1378	RETVAL
		1379
		1380	void
		1381	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1382	PROTOTYPE: $$$$$;$
		1383	PPCODE:
		1384	sv_unmagic (scalar, MMAP_MAGIC);
		1385	{
		1386	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1387	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1388	if (addr == (void *)-1)
		1389	XSRETURN_NO;
		1390
		1391	/* we store the length in mg_obj, as namlen is I32 :/ */
		1392	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1393	->mg_obj = (SV *)length;
		1394
		1395	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1396	if (!(prot & PROT_WRITE))
		1397	SvREADONLY_on (scalar);
		1398
		1399	SvPVX (scalar) = (char *)addr;
		1400	SvCUR_set (scalar, length);
		1401	SvLEN_set (scalar, 0);
		1402	SvPOK_only (scalar);
		1403
		1404	XSRETURN_YES;
		1405	}
		1406
		1407	void
		1408	munmap (SV *scalar)
		1409	PROTOTYPE: $
		1410	CODE:
		1411	sv_unmagic (scalar, MMAP_MAGIC);
		1412
		1413	int
		1414	mlockall (int flags)
		1415	PROTOTYPE: $
		1416	CODE:
		1417	#if _POSIX_MEMLOCK
		1418	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1419	extern int mallopt (int, int);
		1420	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1421	#endif
		1422	mlockall (flags);
		1423	#else
		1424	RETVAL = -1;
		1425	errno = ENOSYS;
		1426	#endif
		1427	OUTPUT:
		1428	RETVAL
		1429
		1430	int
		1431	munlockall ()
		1432	PROTOTYPE:
		1433	CODE:
		1434	#if _POSIX_MEMLOCK
		1435	munlockall ();
		1436	#else
		1437	RETVAL = -1;
		1438	errno = ENOSYS;
		1439	#endif
		1440	OUTPUT:
		1441	RETVAL
		1442
		1443	void _on_next_submit (SV *cb)
		1444	CODE:
		1445	SvREFCNT_dec (on_next_submit);
		1446	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1447
1323	PROTOTYPES: DISABLE	1448	PROTOTYPES: DISABLE
1324		1449
1325	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1450	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1326		1451
1327	void	1452	void
1328	cancel (aio_req_ornot req)	1453	cancel (aio_req_ornot req)
1329	PROTOTYPE:
1330	CODE:	1454	CODE:
1331	req_cancel (req);	1455	eio_cancel (req);
1332		1456
1333	void	1457	void
1334	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1458	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1335	CODE:	1459	PPCODE:
		1460	{
		1461	if (GIMME_V != G_VOID)
		1462	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1463
		1464	if (items > 1)
		1465	{
		1466	SV *cb_cv =get_cb (callback);
		1467
1336	SvREFCNT_dec (req->callback);	1468	SvREFCNT_dec (req->callback);
1337	req->callback = newSVsv (callback);	1469	req->callback = SvREFCNT_inc (cb_cv);
		1470	}
		1471	}
1338		1472
1339	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1473	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1340		1474
1341	void	1475	void
1342	add (aio_req grp, ...)	1476	add (aio_req grp, ...)
1343	PPCODE:	1477	PPCODE:
1344	{	1478	{
1345	int i;	1479	int i;
1346	aio_req req;
1347		1480
1348	if (grp->fd == 2)	1481	if (grp->int1 == 2)
1349	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1482	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1350		1483
1351	for (i = 1; i < items; ++i )	1484	for (i = 1; i < items; ++i )
1352	{	1485	{
		1486	aio_req req;
		1487
1353	if (GIMME_V != G_VOID)	1488	if (GIMME_V != G_VOID)
1354	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1489	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1355		1490
1356	req = SvAIO_REQ (ST (i));	1491	req = SvAIO_REQ (ST (i));
1357		1492
1358	if (req)	1493	if (req)
1359	{	1494	eio_grp_add (grp, req);
1360	++grp->length;
1361	req->grp = grp;
1362
1363	req->grp_prev = 0;
1364	req->grp_next = grp->grp_first;
1365
1366	if (grp->grp_first)
1367	grp->grp_first->grp_prev = req;
1368
1369	grp->grp_first = req;
1370	}
1371	}	1495	}
1372	}	1496	}
		1497
		1498	void
		1499	cancel_subs (aio_req_ornot req)
		1500	CODE:
		1501	req_cancel_subs (req);
1373		1502
1374	void	1503	void
1375	result (aio_req grp, ...)	1504	result (aio_req grp, ...)
1376	CODE:	1505	CODE:
1377	{	1506	{
1378	int i;	1507	int i;
		1508	AV *av;
		1509
		1510	grp->errorno = errno;
		1511
1379	AV *av = newAV ();	1512	av = newAV ();
		1513	av_extend (av, items - 1);
1380		1514
1381	for (i = 1; i < items; ++i )	1515	for (i = 1; i < items; ++i )
1382	av_push (av, newSVsv (ST (i)));	1516	av_push (av, newSVsv (ST (i)));
1383		1517
1384	SvREFCNT_dec (grp->data);	1518	SvREFCNT_dec (grp->sv1);
1385	grp->data = (SV *)av;	1519	grp->sv1 = (SV *)av;
1386	}	1520	}
1387		1521
1388	void	1522	void
		1523	errno (aio_req grp, int errorno = errno)
		1524	CODE:
		1525	grp->errorno = errorno;
		1526
		1527	void
1389	feed_limit (aio_req grp, int limit)	1528	limit (aio_req grp, int limit)
1390	CODE:	1529	CODE:
1391	grp->fd2 = limit;	1530	eio_grp_limit (grp, limit);
1392	aio_grp_feed (grp);
1393		1531
1394	void	1532	void
1395	feed (aio_req grp, SV *callback=&PL_sv_undef)	1533	feed (aio_req grp, SV *callback=&PL_sv_undef)
1396	CODE:	1534	CODE:
1397	{	1535	{
1398	SvREFCNT_dec (grp->fh2);	1536	SvREFCNT_dec (grp->sv2);
1399	grp->fh2 = newSVsv (callback);	1537	grp->sv2 = newSVsv (callback);
		1538	grp->feed = aio_grp_feed;
1400		1539
1401	if (grp->fd2 <= 0)	1540	if (grp->int2 <= 0)
1402	grp->fd2 = 2;	1541	grp->int2 = 2;
1403		1542
1404	aio_grp_feed (grp);	1543	eio_grp_limit (grp, grp->int2);
1405	}	1544	}
1406		1545

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