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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.10 by root, Wed Jul 13 00:13:09 2005 UTC vs.
Revision 1.152 by root, Tue Jul 14 00:32:27 2009 UTC

		1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#define _XOPEN_SOURCE 500	9	#include "schmorp.h"
6		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
7	#include <sys/types.h>	14	#include <sys/types.h>
8	#include <sys/stat.h>	15	#include <sys/stat.h>
9
10	#include <unistd.h>	16	#include <limits.h>
11	#include <fcntl.h>	17	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	18	#include <sched.h>
14	#if __linux
15	#include <sys/syscall.h>
16	#endif
17		19
18	#include <pthread.h>	20	/* perl namespace pollution */
		21	#undef VERSION
19		22
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	23	#ifdef _WIN32
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		24
24	#if __ia64	25	# define EIO_STRUCT_DIRENT Direntry_t
25	# define STACKSIZE 65536	26	# undef malloc
		27	# undef free
		28
		29	// perl overrides all those nice win32 functions
		30	# undef open
		31	# undef read
		32	# undef write
		33	# undef send
		34	# undef recv
		35	# undef stat
		36	# undef fstat
		37	# define lstat stat
		38	# undef truncate
		39	# undef ftruncate
		40	# undef open
		41	# undef close
		42	# undef unlink
		43	# undef rmdir
		44	# undef rename
		45	# undef lseek
		46
		47	# define chown(a,b,c) (errno = ENOSYS, -1)
		48	# define fchown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchmod(a,b) (errno = ENOSYS, -1)
		50	# define symlink(a,b) (errno = ENOSYS, -1)
		51	# define readlink(a,b,c) (errno = ENOSYS, -1)
		52	# define mknod(a,b,c) (errno = ENOSYS, -1)
		53	# define truncate(a,b) (errno = ENOSYS, -1)
		54	# define ftruncate(fd,o) chsize ((fd), (o))
		55	# define fsync(fd) _commit (fd)
		56	# define opendir(fd) (errno = ENOSYS, 0)
		57	# define readdir(fd) (errno = ENOSYS, -1)
		58	# define closedir(fd) (errno = ENOSYS, -1)
		59	# define mkdir(a,b) mkdir (a)
		60
26	#else	61	#else
27	# define STACKSIZE 4096	62
		63	# include <sys/time.h>
		64	# include <sys/select.h>
		65	# include <unistd.h>
		66	# include <utime.h>
		67	# include <signal.h>
		68	# define EIO_STRUCT_DIRENT struct dirent
		69
28	#endif	70	#endif
		71
		72	/* perl stupidly overrides readdir and maybe others */
		73	/* with thread-unsafe versions, imagine that :( */
		74	#undef readdir
		75	#undef opendir
		76	#undef closedir
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
		89	#endif
		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	static HV *stash;
		105	typedef SV SV8; /* byte-sv, used for argument-checking */
		106	typedef int aio_rfd; /* read file desriptor */
		107	typedef int aio_wfd; /* write file descriptor */
		108
		109	#define AIO_REQ_KLASS "IO::AIO::REQ"
		110	#define AIO_GRP_KLASS "IO::AIO::GRP"
		111
		112	#define EIO_REQ_MEMBERS \
		113	SV *callback; \
		114	SV *sv1, *sv2; \
		115	STRLEN stroffset; \
		116	SV *self;
		117
		118	#define EIO_NO_WRAPPERS 1
		119
		120	#include "libeio/eio.h"
		121
		122	#ifndef POSIX_FADV_NORMAL
		123	# define POSIX_FADV_NORMAL 0
		124	# define NO_FADVISE 1
		125	#endif
		126
		127	#ifndef POSIX_FADV_SEQUENTIAL
		128	# define POSIX_FADV_SEQUENTIAL 0
		129	#endif
		130
		131	#ifndef POSIX_FADV_RANDOM
		132	# define POSIX_FADV_RANDOM 0
		133	#endif
		134
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138
		139	#ifndef POSIX_FADV_WILLNEED
		140	# define POSIX_FADV_WILLNEED 0
		141	#endif
		142
		143	#ifndef POSIX_FADV_DONTNEED
		144	# define POSIX_FADV_DONTNEED 0
		145	#endif
		146
		147	static int req_invoke (eio_req *req);
		148	#define EIO_FINISH(req) req_invoke (req)
		149	static void req_destroy (eio_req *grp);
		150	#define EIO_DESTROY(req) req_destroy (req)
29		151
30	enum {	152	enum {
31	REQ_QUIT,	153	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
35	REQ_FSYNC, REQ_FDATASYNC,
36	};	154	};
37		155
38	typedef struct aio_cb {	156	#include "libeio/eio.c"
39	struct aio_cb *volatile next;
40		157
41	int type;
42
43	int fd;
44	off_t offset;
45	size_t length;
46	ssize_t result;
47	mode_t mode; /* open */
48	int errorno;
49	SV *data, *callback;
50	void *dataptr;
51	STRLEN dataoffset;
52
53	Stat_t *statdata;
54	} aio_cb;
55
56	typedef aio_cb *aio_req;	158	typedef eio_req *aio_req;
		159	typedef eio_req *aio_req_ornot;
57		160
58	static int started;	161	static SV *on_next_submit;
59	static int nreqs;	162	static int next_pri = EIO_PRI_DEFAULT;
60	static int max_outstanding = 1<<30;	163	static int max_outstanding;
61	static int respipe [2];
62		164
63	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	165	static int respipe_osf [2], respipe [2] = { -1, -1 };
64	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
65	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66		166
67	static volatile aio_req reqs, reqe; /* queue start, queue end */	167	static void req_destroy (aio_req req);
68	static volatile aio_req ress, rese; /* queue start, queue end */	168	static void req_cancel (aio_req req);
		169
		170	static void want_poll (void)
		171	{
		172	/* write a dummy byte to the pipe so fh becomes ready */
		173	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		174	}
		175
		176	static void done_poll (void)
		177	{
		178	/* read any signals sent by the worker threads */
		179	char buf [4];
		180	while (respipe_read (respipe [0], buf, 4) == 4)
		181	;
		182	}
		183
		184	/* must be called at most once */
		185	static SV *req_sv (aio_req req, const char *klass)
		186	{
		187	if (!req->self)
		188	{
		189	req->self = (SV *)newHV ();
		190	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		191	}
		192
		193	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		194	}
		195
		196	static aio_req SvAIO_REQ (SV *sv)
		197	{
		198	MAGIC *mg;
		199
		200	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		201	croak ("object of class " AIO_REQ_KLASS " expected");
		202
		203	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		204
		205	return mg ? (aio_req)mg->mg_ptr : 0;
		206	}
		207
		208	static void aio_grp_feed (aio_req grp)
		209	{
		210	if (grp->sv2 && SvOK (grp->sv2))
		211	{
		212	dSP;
		213
		214	ENTER;
		215	SAVETMPS;
		216	PUSHMARK (SP);
		217	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		218	PUTBACK;
		219	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		220	SPAGAIN;
		221	FREETMPS;
		222	LEAVE;
		223	}
		224	}
		225
		226	static void req_submit (eio_req *req)
		227	{
		228	eio_submit (req);
		229
		230	if (expect_false (on_next_submit))
		231	{
		232	dSP;
		233	SV *cb = sv_2mortal (on_next_submit);
		234
		235	on_next_submit = 0;
		236
		237	PUSHMARK (SP);
		238	PUTBACK;
		239	call_sv (cb, G_DISCARD | G_EVAL);
		240	}
		241	}
		242
		243	static int req_invoke (eio_req *req)
		244	{
		245	dSP;
		246
		247	if (req->flags & FLAG_SV2_RO_OFF)
		248	SvREADONLY_off (req->sv2);
		249
		250	if (!EIO_CANCELLED (req) && req->callback)
		251	{
		252	ENTER;
		253	SAVETMPS;
		254	PUSHMARK (SP);
		255	EXTEND (SP, 1);
		256
		257	switch (req->type)
		258	{
		259	case EIO_READDIR:
		260	{
		261	SV *rv = &PL_sv_undef;
		262
		263	if (req->result >= 0)
		264	{
		265	int i;
		266	char *names = (char *)req->ptr2;
		267	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		268	AV *av = newAV ();
		269
		270	av_extend (av, req->result - 1);
		271
		272	for (i = 0; i < req->result; ++i)
		273	{
		274	if (req->int1 & EIO_READDIR_DENTS)
		275	{
		276	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		277
		278	if (req->int1 & EIO_READDIR_CUSTOM2)
		279	{
		280	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		281	AV *avent = newAV ();
		282
		283	av_extend (avent, 2);
		284
		285	if (!sv_type [ent->type])
		286	{
		287	sv_type [ent->type] = newSViv (ent->type);
		288	SvREADONLY_on (sv_type [ent->type]);
		289	}
		290
		291	av_store (avent, 0, namesv);
		292	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		293	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		294
		295	av_store (av, i, newRV_noinc ((SV *)avent));
		296	}
		297	else
		298	av_store (av, i, namesv);
		299
		300	++ent;
		301	}
		302	else
		303	{
		304	SV *name = newSVpv (names, 0);
		305	av_store (av, i, name);
		306	names += SvCUR (name) + 1;
		307	}
		308	}
		309
		310	rv = sv_2mortal (newRV_noinc ((SV *)av));
		311	}
		312
		313	PUSHs (rv);
		314
		315	if (req->int1 & EIO_READDIR_CUSTOM1)
		316	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		317	}
		318	break;
		319
		320	case EIO_OPEN:
		321	{
		322	/* convert fd to fh */
		323	SV *fh = &PL_sv_undef;
		324
		325	if (req->result >= 0)
		326	{
		327	GV *gv = (GV *)sv_newmortal ();
		328	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		329	char sym [64];
		330	int symlen;
		331
		332	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		333	gv_init (gv, stash, sym, symlen, 0);
		334
		335	symlen = snprintf (
		336	sym,
		337	sizeof (sym),
		338	"%s&=%d",
		339	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		340	(int)req->result
		341	);
		342
		343	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		344	fh = (SV *)gv;
		345	}
		346
		347	PUSHs (fh);
		348	}
		349	break;
		350
		351	case EIO_GROUP:
		352	req->int1 = 2; /* mark group as finished */
		353
		354	if (req->sv1)
		355	{
		356	int i;
		357	AV *av = (AV *)req->sv1;
		358
		359	EXTEND (SP, AvFILL (av) + 1);
		360	for (i = 0; i <= AvFILL (av); ++i)
		361	PUSHs (*av_fetch (av, i, 0));
		362	}
		363	break;
		364
		365	case EIO_NOP:
		366	case EIO_BUSY:
		367	break;
		368
		369	case EIO_READLINK:
		370	if (req->result > 0)
		371	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		372	break;
		373
		374	case EIO_STAT:
		375	case EIO_LSTAT:
		376	case EIO_FSTAT:
		377	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		378	PL_laststatval = req->result;
		379	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		380	PUSHs (sv_2mortal (newSViv (req->result)));
		381	break;
		382
		383	case EIO_READ:
		384	{
		385	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		386	*SvEND (req->sv2) = 0;
		387	SvPOK_only (req->sv2);
		388	SvSETMAGIC (req->sv2);
		389	PUSHs (sv_2mortal (newSViv (req->result)));
		390	}
		391	break;
		392
		393	case EIO_DUP2:
		394	if (req->result > 0)
		395	req->result = 0;
		396	/* FALLTHROUGH */
		397
		398	default:
		399	PUSHs (sv_2mortal (newSViv (req->result)));
		400	break;
		401	}
		402
		403	errno = req->errorno;
		404
		405	PUTBACK;
		406	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		407	SPAGAIN;
		408
		409	FREETMPS;
		410	LEAVE;
		411
		412	PUTBACK;
		413	}
		414
		415	return !!SvTRUE (ERRSV);
		416	}
		417
		418	static void req_destroy (aio_req req)
		419	{
		420	if (req->self)
		421	{
		422	sv_unmagic (req->self, PERL_MAGIC_ext);
		423	SvREFCNT_dec (req->self);
		424	}
		425
		426	SvREFCNT_dec (req->sv1);
		427	SvREFCNT_dec (req->sv2);
		428	SvREFCNT_dec (req->callback);
		429
		430	Safefree (req);
		431	}
		432
		433	static void req_cancel_subs (aio_req grp)
		434	{
		435	aio_req sub;
		436
		437	if (grp->type != EIO_GROUP)
		438	return;
		439
		440	SvREFCNT_dec (grp->sv2);
		441	grp->sv2 = 0;
		442
		443	eio_grp_cancel (grp);
		444	}
		445
		446	#ifdef USE_SOCKETS_AS_HANDLES
		447	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		448	#else
		449	# define TO_SOCKET(x) (x)
		450	#endif
69		451
70	static void	452	static void
71	poll_wait ()	453	create_respipe (void)
72	{	454	{
73	if (!nreqs)	455	int old_readfd = respipe [0];
74	return;
75		456
		457	if (respipe [1] >= 0)
		458	respipe_close (TO_SOCKET (respipe [1]));
		459
		460	#ifdef _WIN32
		461	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		462	#else
		463	if (pipe (respipe))
		464	#endif
		465	croak ("unable to initialize result pipe");
		466
		467	if (old_readfd >= 0)
		468	{
		469	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		470	croak ("unable to initialize result pipe(2)");
		471
		472	respipe_close (respipe [0]);
		473	respipe [0] = old_readfd;
		474	}
		475
		476	#ifdef _WIN32
		477	int arg = 1;
		478	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		479	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		480	#else
		481	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		482	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		483	#endif
		484	croak ("unable to initialize result pipe(3)");
		485
		486	respipe_osf [0] = TO_SOCKET (respipe [0]);
		487	respipe_osf [1] = TO_SOCKET (respipe [1]);
		488	}
		489
		490	static void poll_wait (void)
		491	{
76	fd_set rfd;	492	fd_set rfd;
		493
		494	while (eio_nreqs ())
		495	{
		496	int size;
		497
		498	X_LOCK (reslock);
		499	size = res_queue.size;
		500	X_UNLOCK (reslock);
		501
		502	if (size)
		503	return;
		504
		505	etp_maybe_start_thread ();
		506
77	FD_ZERO(&rfd);	507	FD_ZERO (&rfd);
78	FD_SET(respipe [0], &rfd);	508	FD_SET (respipe [0], &rfd);
79		509
80	select (respipe [0] + 1, &rfd, 0, 0, 0);	510	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
81	}
82
83	static int
84	poll_cb ()
85	{
86	dSP;
87	int count = 0;
88	aio_req req;
89
90	{
91	/* read and signals sent by the worker threads */
92	char buf [32];
93	while (read (respipe [0], buf, 32) > 0)
94	;
95	}	511	}
		512	}
96		513
		514	static int poll_cb (void)
		515	{
97	for (;;)	516	for (;;)
98	{	517	{
99	pthread_mutex_lock (&reslock);	518	int res = eio_poll ();
100		519
101	req = ress;
102
103	if (ress)	520	if (res > 0)
104	{
105	ress = ress->next;
106	if (!ress) rese = 0;
107	}
108
109	pthread_mutex_unlock (&reslock);
110
111	if (!req)
112	break;	521	croak (0);
113		522
114	nreqs--;	523	if (!max_outstanding || max_outstanding > eio_nreqs ())
		524	return res;
115		525
116	if (req->type == REQ_QUIT)	526	poll_wait ();
117	started--;
118	else
119	{
120	int errorno = errno;
121	errno = req->errorno;
122
123	if (req->type == REQ_READ)
124	SvCUR_set (req->data, req->dataoffset
125	+ req->result > 0 ? req->result : 0);
126
127	if (req->data)
128	SvREFCNT_dec (req->data);
129
130	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
131	{
132	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
133	PL_laststatval = req->result;
134	PL_statcache = *(req->statdata);
135
136	Safefree (req->statdata);
137	}
138
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141
142	if (req->type == REQ_OPEN)
143	{
144	/* convert fd to fh */
145	SV *fh;
146
147	PUTBACK;
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149	SPAGAIN;
150
151	fh = POPs;
152
153	PUSHMARK (SP);
154	XPUSHs (fh);
155	}
156
157	if (SvOK (req->callback))
158	{
159	PUTBACK;
160	call_sv (req->callback, G_VOID | G_EVAL);
161	SPAGAIN;
162	}
163
164	if (req->callback)
165	SvREFCNT_dec (req->callback);
166
167	errno = errorno;
168	count++;
169	}
170
171	Safefree (req);
172	}	527	}
173
174	return count;
175	}	528	}
176		529
177	static void *aio_proc(void *arg);	530	static void atfork_child (void)
178
179	static void
180	start_thread (void)
181	{	531	{
182	sigset_t fullsigset, oldsigset;	532	create_respipe ();
183	pthread_t tid;
184	pthread_attr_t attr;
185
186	pthread_attr_init (&attr);
187	pthread_attr_setstacksize (&attr, STACKSIZE);
188	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
189
190	sigfillset (&fullsigset);
191	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
192
193	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
194	started++;
195
196	sigprocmask (SIG_SETMASK, &oldsigset, 0);
197	}	533	}
198		534
199	static void	535	static SV *
200	send_req (aio_req req)	536	get_cb (SV *cb_sv)
201	{	537	{
202	nreqs++;	538	SvGETMAGIC (cb_sv);
203		539	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
204	pthread_mutex_lock (&reqlock);
205
206	req->next = 0;
207
208	if (reqe)
209	{
210	reqe->next = req;
211	reqe = req;
212	}
213	else
214	reqe = reqs = req;
215
216	pthread_cond_signal (&reqwait);
217	pthread_mutex_unlock (&reqlock);
218
219	while (nreqs > max_outstanding)
220	{
221	poll_wait ();
222	poll_cb ();
223	}
224	}	540	}
225		541
226	static void	542	#define dREQ \
227	end_thread (void)	543	SV *cb_cv; \
228	{
229	aio_req req;	544	aio_req req; \
230	New (0, req, 1, aio_cb);	545	int req_pri = next_pri; \
231	req->type = REQ_QUIT;	546	next_pri = EIO_PRI_DEFAULT; \
232		547	\
233	send_req (req);	548	cb_cv = get_cb (callback); \
234	}	549	\
235
236	static void
237	read_write (int dowrite, int fd, off_t offset, size_t length,
238	SV *data, STRLEN dataoffset, SV *callback)
239	{
240	aio_req req;
241	STRLEN svlen;
242	char *svptr = SvPV (data, svlen);
243
244	SvUPGRADE (data, SVt_PV);
245	SvPOK_on (data);
246
247	if (dataoffset < 0)
248	dataoffset += svlen;
249
250	if (dataoffset < 0 || dataoffset > svlen)
251	croak ("data offset outside of string");
252
253	if (dowrite)
254	{
255	/* write: check length and adjust. */
256	if (length < 0 || length + dataoffset > svlen)
257	length = svlen - dataoffset;
258	}
259	else
260	{
261	/* read: grow scalar as necessary */
262	svptr = SvGROW (data, length + dataoffset);
263	}
264
265	if (length < 0)
266	croak ("length must not be negative");
267
268	Newz (0, req, 1, aio_cb);	550	Newz (0, req, 1, eio_req); \
269		551	if (!req) \
270	if (!req)
271	croak ("out of memory during aio_req allocation");	552	croak ("out of memory during eio_req allocation"); \
272		553	\
273	req->type = dowrite ? REQ_WRITE : REQ_READ;
274	req->fd = fd;
275	req->offset = offset;
276	req->length = length;
277	req->data = SvREFCNT_inc (data);
278	req->dataptr = (char *)svptr + dataoffset;
279	req->callback = SvREFCNT_inc (callback);	554	req->callback = SvREFCNT_inc (cb_cv); \
		555	req->pri = req_pri
280		556
281	send_req (req);	557	#define REQ_SEND \
282	}	558	PUTBACK; \
283		559	req_submit (req); \
284	static void *	560	SPAGAIN; \
285	aio_proc (void *thr_arg)	561	\
286	{	562	if (GIMME_V != G_VOID) \
287	aio_req req;	563	XPUSHs (req_sv (req, AIO_REQ_KLASS));
288	int type;
289
290	do
291	{
292	pthread_mutex_lock (&reqlock);
293
294	for (;;)
295	{
296	req = reqs;
297
298	if (reqs)
299	{
300	reqs = reqs->next;
301	if (!reqs) reqe = 0;
302	}
303
304	if (req)
305	break;
306
307	pthread_cond_wait (&reqwait, &reqlock);
308	}
309
310	pthread_mutex_unlock (&reqlock);
311
312	errno = 0; /* strictly unnecessary */
313
314	type = req->type;
315
316	switch (type)
317	{
318	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
319	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
320	#if SYS_readahead
321	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
322	#else
323	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
324	#endif
325
326	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
327	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
328	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
329
330	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
331	case REQ_CLOSE: req->result = close (req->fd); break;
332	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
333
334	case REQ_FSYNC: req->result = fsync (req->fd); break;
335	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
336
337	case REQ_QUIT:
338	break;
339
340	default:
341	req->result = ENOSYS;
342	break;
343	}
344
345	req->errorno = errno;
346
347	pthread_mutex_lock (&reslock);
348
349	req->next = 0;
350
351	if (rese)
352	{
353	rese->next = req;
354	rese = req;
355	}
356	else
357	{
358	rese = ress = req;
359
360	/* write a dummy byte to the pipe so fh becomes ready */
361	write (respipe [1], &respipe, 1);
362	}
363
364	pthread_mutex_unlock (&reslock);
365	}
366	while (type != REQ_QUIT);
367
368	return 0;
369	}
370		564
371	MODULE = IO::AIO PACKAGE = IO::AIO	565	MODULE = IO::AIO PACKAGE = IO::AIO
372		566
373	PROTOTYPES: ENABLE	567	PROTOTYPES: ENABLE
374		568
375	BOOT:	569	BOOT:
376	{	570	{
377	if (pipe (respipe))	571	static const struct {
378	croak ("unable to initialize result pipe");	572	const char *name;
		573	IV iv;
		574	} *civ, const_iv[] = {
		575	# define const_iv(name, value) { # name, (IV) value },
		576	# define const_eio(name) { # name, (IV) EIO_ ## name },
		577	const_iv (EXDEV , EXDEV)
		578	const_iv (ENOSYS , ENOSYS)
		579	const_iv (O_RDONLY, O_RDONLY)
		580	const_iv (O_WRONLY, O_WRONLY)
		581	const_iv (O_CREAT , O_CREAT)
		582	const_iv (O_TRUNC , O_TRUNC)
		583	#ifndef _WIN32
		584	const_iv (S_IFIFO , S_IFIFO)
		585	#endif
		586	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		587	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		588	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		589	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		590	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		591	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
379		592
380	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	593	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
381	croak ("cannot set result pipe to nonblocking mode");	594	const_eio (SYNC_FILE_RANGE_WRITE)
		595	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
382		596
383	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	597	const_eio (READDIR_DENTS)
384	croak ("cannot set result pipe to nonblocking mode");	598	const_eio (READDIR_DIRS_FIRST)
385	}	599	const_eio (READDIR_STAT_ORDER)
		600	const_eio (READDIR_FOUND_UNKNOWN)
386		601
		602	const_eio (DT_UNKNOWN)
		603	const_eio (DT_FIFO)
		604	const_eio (DT_CHR)
		605	const_eio (DT_DIR)
		606	const_eio (DT_BLK)
		607	const_eio (DT_REG)
		608	const_eio (DT_LNK)
		609	const_eio (DT_SOCK)
		610	const_eio (DT_WHT)
		611	};
		612
		613	stash = gv_stashpv ("IO::AIO", 1);
		614
		615	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		616	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
		617
		618	create_respipe ();
		619
		620	if (eio_init (want_poll, done_poll) < 0)
		621	croak ("IO::AIO: unable to initialise eio library");
		622
		623	/* atfork child called in fifo order, so before eio's handler */
		624	X_THREAD_ATFORK (0, 0, atfork_child);
		625	}
		626
387	void	627	void
388	min_parallel(nthreads)	628	max_poll_reqs (int nreqs)
389	int nthreads
390	PROTOTYPE: $	629	PROTOTYPE: $
391	CODE:	630	CODE:
392	while (nthreads > started)	631	eio_set_max_poll_reqs (nreqs);
393	start_thread ();
394		632
395	void	633	void
396	max_parallel(nthreads)	634	max_poll_time (double nseconds)
397	int nthreads
398	PROTOTYPE: $	635	PROTOTYPE: $
399	CODE:	636	CODE:
		637	eio_set_max_poll_time (nseconds);
		638
		639	void
		640	min_parallel (int nthreads)
		641	PROTOTYPE: $
		642	CODE:
		643	eio_set_min_parallel (nthreads);
		644
		645	void
		646	max_parallel (int nthreads)
		647	PROTOTYPE: $
		648	CODE:
		649	eio_set_max_parallel (nthreads);
		650
		651	void
		652	max_idle (int nthreads)
		653	PROTOTYPE: $
		654	CODE:
		655	eio_set_max_idle (nthreads);
		656
		657	void
		658	max_outstanding (int maxreqs)
		659	PROTOTYPE: $
		660	CODE:
		661	max_outstanding = maxreqs;
		662
		663	void
		664	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		665	PROTOTYPE: $$$;$
		666	PPCODE:
400	{	667	{
401	int cur = started;	668	dREQ;
402	while (cur > nthreads)	669
403	{	670	req->type = EIO_OPEN;
404	end_thread ();	671	req->sv1 = newSVsv (pathname);
		672	req->ptr1 = SvPVbyte_nolen (req->sv1);
		673	req->int1 = flags;
		674	req->int2 = mode;
		675
		676	REQ_SEND;
		677	}
		678
		679	void
		680	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		681	PROTOTYPE: $;$
		682	ALIAS:
		683	aio_fsync = EIO_FSYNC
		684	aio_fdatasync = EIO_FDATASYNC
		685	PPCODE:
		686	{
		687	int fd = s_fileno_croak (fh, 0);
		688	dREQ;
		689
		690	req->type = ix;
		691	req->sv1 = newSVsv (fh);
		692	req->int1 = fd;
		693
		694	REQ_SEND (req);
		695	}
		696
		697	void
		698	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		699	PROTOTYPE: $$$$;$
		700	PPCODE:
		701	{
		702	int fd = s_fileno_croak (fh, 0);
		703	dREQ;
		704
		705	req->type = EIO_SYNC_FILE_RANGE;
		706	req->sv1 = newSVsv (fh);
		707	req->int1 = fd;
		708	req->offs = offset;
		709	req->size = nbytes;
		710	req->int2 = flags;
		711
		712	REQ_SEND (req);
		713	}
		714
		715	void
		716	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		717	PROTOTYPE: $;$
		718	PPCODE:
		719	{
		720	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		721	int fd = s_fileno_croak (fh, 0);
		722	dREQ;
		723
		724	if (close_pipe < 0)
		725	{
		726	int pipefd [2];
		727
		728	if (pipe (pipefd) < 0
		729	|| close (pipefd [1]) < 0
		730	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		731	abort (); /*D*/
		732
		733	close_pipe = pipefd [0];
		734	}
		735
		736	req->type = EIO_DUP2;
		737	req->int1 = close_pipe;
		738	req->sv2 = newSVsv (fh);
		739	req->int2 = fd;
		740
		741	REQ_SEND (req);
		742	}
		743
		744	void
		745	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		746	ALIAS:
		747	aio_read = EIO_READ
		748	aio_write = EIO_WRITE
		749	PROTOTYPE: $$$$$;$
		750	PPCODE:
		751	{
		752	STRLEN svlen;
		753	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		754	char *svptr = SvPVbyte (data, svlen);
		755	UV len = SvUV (length);
		756
		757	if (dataoffset < 0)
		758	dataoffset += svlen;
		759
		760	if (dataoffset < 0 || dataoffset > svlen)
		761	croak ("dataoffset outside of data scalar");
		762
		763	if (ix == EIO_WRITE)
		764	{
		765	/* write: check length and adjust. */
		766	if (!SvOK (length) || len + dataoffset > svlen)
		767	len = svlen - dataoffset;
		768	}
		769	else
		770	{
		771	/* read: check type and grow scalar as necessary */
		772	SvUPGRADE (data, SVt_PV);
		773	svptr = SvGROW (data, len + dataoffset + 1);
		774	}
		775
		776	{
		777	dREQ;
		778
		779	req->type = ix;
		780	req->sv1 = newSVsv (fh);
		781	req->int1 = fd;
		782	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		783	req->size = len;
		784	req->sv2 = SvREFCNT_inc (data);
		785	req->ptr2 = (char *)svptr + dataoffset;
		786	req->stroffset = dataoffset;
		787
		788	if (!SvREADONLY (data))
405	cur--;	789	{
		790	SvREADONLY_on (data);
		791	req->flags |= FLAG_SV2_RO_OFF;
406	}	792	}
407		793
408	while (started > nthreads)	794	REQ_SEND;
		795	}
		796	}
		797
		798	void
		799	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		800	PROTOTYPE: $$;$
		801	PPCODE:
		802	{
		803	SV *data;
		804	dREQ;
		805
		806	req->type = EIO_READLINK;
		807	req->sv1 = newSVsv (path);
		808	req->ptr1 = SvPVbyte_nolen (req->sv1);
		809
		810	REQ_SEND;
		811	}
		812
		813	void
		814	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		815	PROTOTYPE: $$$$;$
		816	PPCODE:
		817	{
		818	int ifd = s_fileno_croak (in_fh , 0);
		819	int ofd = s_fileno_croak (out_fh, 1);
		820	dREQ;
		821
		822	req->type = EIO_SENDFILE;
		823	req->sv1 = newSVsv (out_fh);
		824	req->int1 = ofd;
		825	req->sv2 = newSVsv (in_fh);
		826	req->int2 = ifd;
		827	req->offs = in_offset;
		828	req->size = length;
		829
		830	REQ_SEND;
		831	}
		832
		833	void
		834	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		835	PROTOTYPE: $$$;$
		836	PPCODE:
		837	{
		838	int fd = s_fileno_croak (fh, 0);
		839	dREQ;
		840
		841	req->type = EIO_READAHEAD;
		842	req->sv1 = newSVsv (fh);
		843	req->int1 = fd;
		844	req->offs = offset;
		845	req->size = length;
		846
		847	REQ_SEND;
		848	}
		849
		850	void
		851	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		852	ALIAS:
		853	aio_stat = EIO_STAT
		854	aio_lstat = EIO_LSTAT
		855	PPCODE:
		856	{
		857	dREQ;
		858
		859	req->sv1 = newSVsv (fh_or_path);
		860
		861	if (SvPOK (req->sv1))
		862	{
		863	req->type = ix;
		864	req->ptr1 = SvPVbyte_nolen (req->sv1);
		865	}
		866	else
		867	{
		868	req->type = EIO_FSTAT;
		869	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		870	}
		871
		872	REQ_SEND;
		873	}
		874
		875	void
		876	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		877	PPCODE:
		878	{
		879	dREQ;
		880
		881	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		882	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		883	req->sv1 = newSVsv (fh_or_path);
		884
		885	if (SvPOK (req->sv1))
		886	{
		887	req->type = EIO_UTIME;
		888	req->ptr1 = SvPVbyte_nolen (req->sv1);
		889	}
		890	else
		891	{
		892	req->type = EIO_FUTIME;
		893	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		894	}
		895
		896	REQ_SEND;
		897	}
		898
		899	void
		900	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		901	PPCODE:
		902	{
		903	dREQ;
		904
		905	req->sv1 = newSVsv (fh_or_path);
		906	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		907
		908	if (SvPOK (req->sv1))
		909	{
		910	req->type = EIO_TRUNCATE;
		911	req->ptr1 = SvPVbyte_nolen (req->sv1);
		912	}
		913	else
		914	{
		915	req->type = EIO_FTRUNCATE;
		916	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		917	}
		918
		919	REQ_SEND;
		920	}
		921
		922	void
		923	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		924	ALIAS:
		925	aio_chmod = EIO_CHMOD
		926	aio_mkdir = EIO_MKDIR
		927	PPCODE:
		928	{
		929	dREQ;
		930
		931	req->int2 = mode;
		932	req->sv1 = newSVsv (fh_or_path);
		933
		934	if (SvPOK (req->sv1))
		935	{
		936	req->type = ix;
		937	req->ptr1 = SvPVbyte_nolen (req->sv1);
		938	}
		939	else
		940	{
		941	req->type = EIO_FCHMOD;
		942	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		943	}
		944
		945	REQ_SEND;
		946	}
		947
		948	void
		949	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		950	PPCODE:
		951	{
		952	dREQ;
		953
		954	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		955	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		956	req->sv1 = newSVsv (fh_or_path);
		957
		958	if (SvPOK (req->sv1))
		959	{
		960	req->type = EIO_CHOWN;
		961	req->ptr1 = SvPVbyte_nolen (req->sv1);
		962	}
		963	else
		964	{
		965	req->type = EIO_FCHOWN;
		966	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		967	}
		968
		969	REQ_SEND;
		970	}
		971
		972	void
		973	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		974	PPCODE:
		975	{
		976	dREQ;
		977
		978	req->type = EIO_READDIR;
		979	req->sv1 = newSVsv (pathname);
		980	req->ptr1 = SvPVbyte_nolen (req->sv1);
		981	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		982
		983	if (flags & EIO_READDIR_DENTS)
		984	req->int1 |= EIO_READDIR_CUSTOM2;
		985
		986	REQ_SEND;
		987	}
		988
		989	void
		990	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		991	ALIAS:
		992	aio_unlink = EIO_UNLINK
		993	aio_rmdir = EIO_RMDIR
		994	aio_readdir = EIO_READDIR
		995	PPCODE:
		996	{
		997	dREQ;
		998
		999	req->type = ix;
		1000	req->sv1 = newSVsv (pathname);
		1001	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1002
		1003	REQ_SEND;
		1004	}
		1005
		1006	void
		1007	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1008	ALIAS:
		1009	aio_link = EIO_LINK
		1010	aio_symlink = EIO_SYMLINK
		1011	aio_rename = EIO_RENAME
		1012	PPCODE:
		1013	{
		1014	dREQ;
		1015
		1016	req->type = ix;
		1017	req->sv1 = newSVsv (oldpath);
		1018	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1019	req->sv2 = newSVsv (newpath);
		1020	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1021
		1022	REQ_SEND;
		1023	}
		1024
		1025	void
		1026	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1027	PPCODE:
		1028	{
		1029	dREQ;
		1030
		1031	req->type = EIO_MKNOD;
		1032	req->sv1 = newSVsv (pathname);
		1033	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1034	req->int2 = (mode_t)mode;
		1035	req->offs = dev;
		1036
		1037	REQ_SEND;
		1038	}
		1039
		1040	void
		1041	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1042	PPCODE:
		1043	{
		1044	dREQ;
		1045
		1046	req->type = EIO_BUSY;
		1047	req->nv1 = delay < 0. ? 0. : delay;
		1048
		1049	REQ_SEND;
		1050	}
		1051
		1052	void
		1053	aio_group (SV *callback=&PL_sv_undef)
		1054	PROTOTYPE: ;$
		1055	PPCODE:
		1056	{
		1057	dREQ;
		1058
		1059	req->type = EIO_GROUP;
		1060
		1061	req_submit (req);
		1062	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1063	}
		1064
		1065	void
		1066	aio_nop (SV *callback=&PL_sv_undef)
		1067	ALIAS:
		1068	aio_nop = EIO_NOP
		1069	aio_sync = EIO_SYNC
		1070	PPCODE:
		1071	{
		1072	dREQ;
		1073
		1074	req->type = ix;
		1075
		1076	REQ_SEND;
		1077	}
		1078
		1079	int
		1080	aioreq_pri (int pri = 0)
		1081	PROTOTYPE: ;$
		1082	CODE:
		1083	RETVAL = next_pri;
		1084	if (items > 0)
		1085	{
		1086	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1087	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1088	next_pri = pri;
		1089	}
		1090	OUTPUT:
		1091	RETVAL
		1092
		1093	void
		1094	aioreq_nice (int nice = 0)
		1095	CODE:
		1096	nice = next_pri - nice;
		1097	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1098	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1099	next_pri = nice;
		1100
		1101	void
		1102	flush ()
		1103	PROTOTYPE:
		1104	CODE:
		1105	while (eio_nreqs ())
409	{	1106	{
410	poll_wait ();	1107	poll_wait ();
411	poll_cb ();	1108	poll_cb ();
412	}	1109	}
413	}
414		1110
415	int	1111	int
416	max_outstanding(nreqs)
417	int nreqs
418	PROTOTYPE: $
419	CODE:
420	RETVAL = max_outstanding;
421	max_outstanding = nreqs;
422
423	void
424	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
425	SV * pathname
426	int flags
427	int mode
428	SV * callback
429	PROTOTYPE: $$$;$
430	CODE:
431	{
432	aio_req req;
433
434	Newz (0, req, 1, aio_cb);
435
436	if (!req)
437	croak ("out of memory during aio_req allocation");
438
439	req->type = REQ_OPEN;
440	req->data = newSVsv (pathname);
441	req->dataptr = SvPV_nolen (req->data);
442	req->fd = flags;
443	req->mode = mode;
444	req->callback = SvREFCNT_inc (callback);
445
446	send_req (req);
447	}
448
449	void
450	aio_close(fh,callback=&PL_sv_undef)
451	InputStream fh
452	SV * callback
453	PROTOTYPE: $;$
454	ALIAS:
455	aio_close = REQ_CLOSE
456	aio_fsync = REQ_FSYNC
457	aio_fdatasync = REQ_FDATASYNC
458	CODE:
459	{
460	aio_req req;
461
462	Newz (0, req, 1, aio_cb);
463
464	if (!req)
465	croak ("out of memory during aio_req allocation");
466
467	req->type = ix;
468	req->fd = PerlIO_fileno (fh);
469	req->callback = SvREFCNT_inc (callback);
470
471	send_req (req);
472	}
473
474	void
475	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
476	InputStream fh
477	UV offset
478	IV length
479	SV * data
480	IV dataoffset
481	SV * callback
482	PROTOTYPE: $$$$$;$
483	CODE:
484	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
485
486	void
487	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
488	OutputStream fh
489	UV offset
490	IV length
491	SV * data
492	IV dataoffset
493	SV * callback
494	PROTOTYPE: $$$$$;$
495	CODE:
496	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
497
498	void
499	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
500	InputStream fh
501	UV offset
502	IV length
503	SV * callback
504	PROTOTYPE: $$$;$
505	CODE:
506	{
507	aio_req req;
508
509	if (length < 0)
510	croak ("length must not be negative");
511
512	Newz (0, req, 1, aio_cb);
513
514	if (!req)
515	croak ("out of memory during aio_req allocation");
516
517	req->type = REQ_READAHEAD;
518	req->fd = PerlIO_fileno (fh);
519	req->offset = offset;
520	req->length = length;
521	req->callback = SvREFCNT_inc (callback);
522
523	send_req (req);
524	}
525
526	void
527	aio_stat(fh_or_path,callback=&PL_sv_undef)
528	SV * fh_or_path
529	SV * callback
530	ALIAS:
531	aio_stat = REQ_STAT
532	aio_lstat = REQ_LSTAT
533	CODE:
534	{
535	aio_req req;
536
537	Newz (0, req, 1, aio_cb);
538
539	if (!req)
540	croak ("out of memory during aio_req allocation");
541
542	New (0, req->statdata, 1, Stat_t);
543
544	if (!req->statdata)
545	croak ("out of memory during aio_req->statdata allocation");
546
547	if (SvPOK (fh_or_path))
548	{
549	req->type = ix;
550	req->data = newSVsv (fh_or_path);
551	req->dataptr = SvPV_nolen (req->data);
552	}
553	else
554	{
555	req->type = REQ_FSTAT;
556	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
557	}
558
559	req->callback = SvREFCNT_inc (callback);
560
561	send_req (req);
562	}
563
564	void
565	aio_unlink(pathname,callback=&PL_sv_undef)
566	SV * pathname
567	SV * callback
568	CODE:
569	{
570	aio_req req;
571
572	Newz (0, req, 1, aio_cb);
573
574	if (!req)
575	croak ("out of memory during aio_req allocation");
576
577	req->type = REQ_UNLINK;
578	req->data = newSVsv (pathname);
579	req->dataptr = SvPV_nolen (req->data);
580	req->callback = SvREFCNT_inc (callback);
581
582	send_req (req);
583	}
584
585	void
586	flush()
587	PROTOTYPE:
588	CODE:
589	while (nreqs)
590	{
591	poll_wait ();
592	poll_cb ();
593	}
594
595	void
596	poll()	1112	poll()
597	PROTOTYPE:	1113	PROTOTYPE:
598	CODE:	1114	CODE:
599	if (nreqs)
600	{
601	poll_wait ();	1115	poll_wait ();
602	poll_cb ();	1116	RETVAL = poll_cb ();
603	}	1117	OUTPUT:
		1118	RETVAL
604		1119
605	int	1120	int
606	poll_fileno()	1121	poll_fileno()
607	PROTOTYPE:	1122	PROTOTYPE:
608	CODE:	1123	CODE:
…		…
620		1135
621	void	1136	void
622	poll_wait()	1137	poll_wait()
623	PROTOTYPE:	1138	PROTOTYPE:
624	CODE:	1139	CODE:
625	if (nreqs)
626	poll_wait ();	1140	poll_wait ();
627		1141
628	int	1142	int
629	nreqs()	1143	nreqs()
630	PROTOTYPE:	1144	PROTOTYPE:
631	CODE:	1145	CODE:
632	RETVAL = nreqs;	1146	RETVAL = eio_nreqs ();
633	OUTPUT:	1147	OUTPUT:
634	RETVAL	1148	RETVAL
635		1149
		1150	int
		1151	nready()
		1152	PROTOTYPE:
		1153	CODE:
		1154	RETVAL = eio_nready ();
		1155	OUTPUT:
		1156	RETVAL
		1157
		1158	int
		1159	npending()
		1160	PROTOTYPE:
		1161	CODE:
		1162	RETVAL = eio_npending ();
		1163	OUTPUT:
		1164	RETVAL
		1165
		1166	int
		1167	nthreads()
		1168	PROTOTYPE:
		1169	CODE:
		1170	RETVAL = eio_nthreads ();
		1171	OUTPUT:
		1172	RETVAL
		1173
		1174	int
		1175	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1176	PROTOTYPE: $$$$
		1177	CODE:
		1178	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1179	RETVAL = posix_fadvise (fh, offset, length, advice);
		1180	#else
		1181	RETVAL = errno = ENOSYS;
		1182	#endif
		1183	OUTPUT:
		1184	RETVAL
		1185
		1186	ssize_t
		1187	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1188	PROTOTYPE: $$$$
		1189	CODE:
		1190	eio_sendfile_sync (ofh, ifh, offset, count);
		1191
		1192	void _on_next_submit (SV *cb)
		1193	CODE:
		1194	SvREFCNT_dec (on_next_submit);
		1195	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1196
		1197	PROTOTYPES: DISABLE
		1198
		1199	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1200
		1201	void
		1202	cancel (aio_req_ornot req)
		1203	CODE:
		1204	eio_cancel (req);
		1205
		1206	void
		1207	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1208	PPCODE:
		1209	{
		1210	if (GIMME_V != G_VOID)
		1211	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1212
		1213	if (items > 1)
		1214	{
		1215	SV *cb_cv =get_cb (callback);
		1216
		1217	SvREFCNT_dec (req->callback);
		1218	req->callback = SvREFCNT_inc (cb_cv);
		1219	}
		1220	}
		1221
		1222	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1223
		1224	void
		1225	add (aio_req grp, ...)
		1226	PPCODE:
		1227	{
		1228	int i;
		1229
		1230	if (grp->int1 == 2)
		1231	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1232
		1233	for (i = 1; i < items; ++i )
		1234	{
		1235	aio_req req;
		1236
		1237	if (GIMME_V != G_VOID)
		1238	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1239
		1240	req = SvAIO_REQ (ST (i));
		1241
		1242	if (req)
		1243	eio_grp_add (grp, req);
		1244	}
		1245	}
		1246
		1247	void
		1248	cancel_subs (aio_req_ornot req)
		1249	CODE:
		1250	req_cancel_subs (req);
		1251
		1252	void
		1253	result (aio_req grp, ...)
		1254	CODE:
		1255	{
		1256	int i;
		1257	AV *av;
		1258
		1259	grp->errorno = errno;
		1260
		1261	av = newAV ();
		1262	av_extend (av, items - 1);
		1263
		1264	for (i = 1; i < items; ++i )
		1265	av_push (av, newSVsv (ST (i)));
		1266
		1267	SvREFCNT_dec (grp->sv1);
		1268	grp->sv1 = (SV *)av;
		1269	}
		1270
		1271	void
		1272	errno (aio_req grp, int errorno = errno)
		1273	CODE:
		1274	grp->errorno = errorno;
		1275
		1276	void
		1277	limit (aio_req grp, int limit)
		1278	CODE:
		1279	eio_grp_limit (grp, limit);
		1280
		1281	void
		1282	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1283	CODE:
		1284	{
		1285	SvREFCNT_dec (grp->sv2);
		1286	grp->sv2 = newSVsv (callback);
		1287	grp->feed = aio_grp_feed;
		1288
		1289	if (grp->int2 <= 0)
		1290	grp->int2 = 2;
		1291
		1292	eio_grp_limit (grp, grp->int2);
		1293	}
		1294

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