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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.3 by root, Sun Jul 10 20:07:11 2005 UTC vs.
Revision 1.149 by root, Tue Jun 30 07:33:58 2009 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
		9	#include <stddef.h>
		10	#include <stdlib.h>
		11	#include <errno.h>
7	#include <sys/types.h>	12	#include <sys/types.h>
8	#include <sys/stat.h>	13	#include <sys/stat.h>
9	#include <unistd.h>	14	#include <limits.h>
10	#include <fcntl.h>	15	#include <fcntl.h>
11	#include <signal.h>
12	#include <sched.h>	16	#include <sched.h>
13	#include <endian.h>
14		17
15	#include <pthread.h>	18	/* perl namespace pollution */
16	#include <sys/syscall.h>	19	#undef VERSION
17		20
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	#ifdef _WIN32
19	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
20	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
21		22
22	#if __i386 || __amd64	23	# define EIO_STRUCT_DIRENT Direntry_t
23	# define STACKSIZE ( 256 * sizeof (long))	24	# undef malloc
24	#elif __ia64	25	# undef free
25	# define STACKSIZE (8192 * sizeof (long))	26
		27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
26	#else	59	#else
27	# define STACKSIZE ( 512 * sizeof (long))	60
		61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
28	#endif	68	#endif
29		69
		70	/* perl stupidly overrides readdir and maybe others */
		71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define VAL64 IV
		81	# define SvVAL64 SvIV
		82	# define newSVval64 newSViv
		83	#else
		84	# define VAL64 NV
		85	# define SvVAL64 SvNV
		86	# define newSVval64 newSVnv
		87	#endif
		88
		89	/*****************************************************************************/
		90
		91	#if __GNUC__ >= 3
		92	# define expect(expr,value) __builtin_expect ((expr),(value))
		93	#else
		94	# define expect(expr,value) (expr)
		95	#endif
		96
		97	#define expect_false(expr) expect ((expr) != 0, 0)
		98	#define expect_true(expr) expect ((expr) != 0, 1)
		99
		100	/*****************************************************************************/
		101
		102	static HV *stash;
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	#define AIO_REQ_KLASS "IO::AIO::REQ"
		108	#define AIO_GRP_KLASS "IO::AIO::GRP"
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/eio.h"
		119
		120	#ifndef POSIX_FADV_NORMAL
		121	# define POSIX_FADV_NORMAL 0
		122	# define NO_FADVISE 1
		123	#endif
		124
		125	#ifndef POSIX_FADV_SEQUENTIAL
		126	# define POSIX_FADV_SEQUENTIAL 0
		127	#endif
		128
		129	#ifndef POSIX_FADV_RANDOM
		130	# define POSIX_FADV_RANDOM 0
		131	#endif
		132
		133	#ifndef POSIX_FADV_NOREUSE
		134	# define POSIX_FADV_NOREUSE 0
		135	#endif
		136
		137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	static int req_invoke (eio_req *req);
		146	#define EIO_FINISH(req) req_invoke (req)
		147	static void req_destroy (eio_req *grp);
		148	#define EIO_DESTROY(req) req_destroy (req)
		149
30	enum {	150	enum {
31	REQ_QUIT,	151	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	};	152	};
37		153
38	typedef struct aio_cb {	154	#include "libeio/eio.c"
39	struct aio_cb *volatile next;
40		155
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;	156	typedef eio_req *aio_req;
		157	typedef eio_req *aio_req_ornot;
57		158
58	static int started;	159	static SV *on_next_submit;
59	static int nreqs;	160	static int next_pri = EIO_PRI_DEFAULT;
60	static int respipe [2];	161	static int max_outstanding;
61		162
62	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	163	static int respipe_osf [2], respipe [2] = { -1, -1 };
63	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
64	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
65		164
66	static volatile aio_req reqs, reqe; /* queue start, queue end */	165	static void req_destroy (aio_req req);
67	static volatile aio_req ress, rese; /* queue start, queue end */	166	static void req_cancel (aio_req req);
68		167
69	static void *aio_proc(void *arg);	168	static void want_poll (void)
		169	{
		170	/* write a dummy byte to the pipe so fh becomes ready */
		171	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		172	}
		173
		174	static void done_poll (void)
		175	{
		176	/* read any signals sent by the worker threads */
		177	char buf [4];
		178	while (respipe_read (respipe [0], buf, 4) == 4)
		179	;
		180	}
		181
		182	/* must be called at most once */
		183	static SV *req_sv (aio_req req, const char *klass)
		184	{
		185	if (!req->self)
		186	{
		187	req->self = (SV *)newHV ();
		188	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		189	}
		190
		191	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		192	}
		193
		194	static aio_req SvAIO_REQ (SV *sv)
		195	{
		196	MAGIC *mg;
		197
		198	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		199	croak ("object of class " AIO_REQ_KLASS " expected");
		200
		201	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		202
		203	return mg ? (aio_req)mg->mg_ptr : 0;
		204	}
		205
		206	static void aio_grp_feed (aio_req grp)
		207	{
		208	if (grp->sv2 && SvOK (grp->sv2))
		209	{
		210	dSP;
		211
		212	ENTER;
		213	SAVETMPS;
		214	PUSHMARK (SP);
		215	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		216	PUTBACK;
		217	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		218	SPAGAIN;
		219	FREETMPS;
		220	LEAVE;
		221	}
		222	}
		223
		224	static void req_submit (eio_req *req)
		225	{
		226	eio_submit (req);
		227
		228	if (expect_false (on_next_submit))
		229	{
		230	dSP;
		231	SV *cb = sv_2mortal (on_next_submit);
		232
		233	on_next_submit = 0;
		234
		235	PUSHMARK (SP);
		236	PUTBACK;
		237	call_sv (cb, G_DISCARD | G_EVAL);
		238	}
		239	}
		240
		241	static int req_invoke (eio_req *req)
		242	{
		243	dSP;
		244
		245	if (req->flags & FLAG_SV2_RO_OFF)
		246	SvREADONLY_off (req->sv2);
		247
		248	if (!EIO_CANCELLED (req) && req->callback)
		249	{
		250	ENTER;
		251	SAVETMPS;
		252	PUSHMARK (SP);
		253	EXTEND (SP, 1);
		254
		255	switch (req->type)
		256	{
		257	case EIO_READDIR:
		258	{
		259	SV *rv = &PL_sv_undef;
		260
		261	if (req->result >= 0)
		262	{
		263	int i;
		264	char *names = (char *)req->ptr2;
		265	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		266	AV *av = newAV ();
		267
		268	av_extend (av, req->result - 1);
		269
		270	for (i = 0; i < req->result; ++i)
		271	{
		272	if (req->int1 & EIO_READDIR_DENTS)
		273	{
		274	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		275
		276	if (req->int1 & EIO_READDIR_CUSTOM2)
		277	{
		278	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		279	AV *avent = newAV ();
		280
		281	av_extend (avent, 2);
		282
		283	if (!sv_type [ent->type])
		284	{
		285	sv_type [ent->type] = newSViv (ent->type);
		286	SvREADONLY_on (sv_type [ent->type]);
		287	}
		288
		289	av_store (avent, 0, namesv);
		290	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		291	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		292
		293	av_store (av, i, newRV_noinc ((SV *)avent));
		294	}
		295	else
		296	av_store (av, i, namesv);
		297
		298	++ent;
		299	}
		300	else
		301	{
		302	SV *name = newSVpv (names, 0);
		303	av_store (av, i, name);
		304	names += SvCUR (name) + 1;
		305	}
		306	}
		307
		308	rv = sv_2mortal (newRV_noinc ((SV *)av));
		309	}
		310
		311	PUSHs (rv);
		312
		313	if (req->int1 & EIO_READDIR_CUSTOM1)
		314	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		315	}
		316	break;
		317
		318	case EIO_OPEN:
		319	{
		320	/* convert fd to fh */
		321	SV *fh = &PL_sv_undef;
		322
		323	if (req->result >= 0)
		324	{
		325	GV *gv = (GV *)sv_newmortal ();
		326	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		327	char sym [64];
		328	int symlen;
		329
		330	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		331	gv_init (gv, stash, sym, symlen, 0);
		332
		333	symlen = snprintf (
		334	sym,
		335	sizeof (sym),
		336	"%s&=%d",
		337	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		338	(int)req->result
		339	);
		340
		341	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		342	fh = (SV *)gv;
		343	}
		344
		345	PUSHs (fh);
		346	}
		347	break;
		348
		349	case EIO_GROUP:
		350	req->int1 = 2; /* mark group as finished */
		351
		352	if (req->sv1)
		353	{
		354	int i;
		355	AV *av = (AV *)req->sv1;
		356
		357	EXTEND (SP, AvFILL (av) + 1);
		358	for (i = 0; i <= AvFILL (av); ++i)
		359	PUSHs (*av_fetch (av, i, 0));
		360	}
		361	break;
		362
		363	case EIO_NOP:
		364	case EIO_BUSY:
		365	break;
		366
		367	case EIO_READLINK:
		368	if (req->result > 0)
		369	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		370	break;
		371
		372	case EIO_STAT:
		373	case EIO_LSTAT:
		374	case EIO_FSTAT:
		375	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		376	PL_laststatval = req->result;
		377	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		378	PUSHs (sv_2mortal (newSViv (req->result)));
		379	break;
		380
		381	case EIO_READ:
		382	{
		383	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		384	*SvEND (req->sv2) = 0;
		385	SvPOK_only (req->sv2);
		386	SvSETMAGIC (req->sv2);
		387	PUSHs (sv_2mortal (newSViv (req->result)));
		388	}
		389	break;
		390
		391	case EIO_DUP2:
		392	if (req->result > 0)
		393	req->result = 0;
		394	/* FALLTHROUGH */
		395
		396	default:
		397	PUSHs (sv_2mortal (newSViv (req->result)));
		398	break;
		399	}
		400
		401	errno = req->errorno;
		402
		403	PUTBACK;
		404	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		405	SPAGAIN;
		406
		407	FREETMPS;
		408	LEAVE;
		409
		410	PUTBACK;
		411	}
		412
		413	return !!SvTRUE (ERRSV);
		414	}
		415
		416	static void req_destroy (aio_req req)
		417	{
		418	if (req->self)
		419	{
		420	sv_unmagic (req->self, PERL_MAGIC_ext);
		421	SvREFCNT_dec (req->self);
		422	}
		423
		424	SvREFCNT_dec (req->sv1);
		425	SvREFCNT_dec (req->sv2);
		426	SvREFCNT_dec (req->callback);
		427
		428	Safefree (req);
		429	}
		430
		431	static void req_cancel_subs (aio_req grp)
		432	{
		433	aio_req sub;
		434
		435	if (grp->type != EIO_GROUP)
		436	return;
		437
		438	SvREFCNT_dec (grp->sv2);
		439	grp->sv2 = 0;
		440
		441	eio_grp_cancel (grp);
		442	}
		443
		444	#ifdef USE_SOCKETS_AS_HANDLES
		445	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		446	#else
		447	# define TO_SOCKET(x) (x)
		448	#endif
70		449
71	static void	450	static void
72	start_thread (void)	451	create_respipe (void)
73	{	452	{
74	sigset_t fullsigset, oldsigset;	453	int old_readfd = respipe [0];
75	pthread_t tid;
76	pthread_attr_t attr;
77		454
78	pthread_attr_init (&attr);	455	if (respipe [1] >= 0)
79	pthread_attr_setstacksize (&attr, STACKSIZE);	456	respipe_close (TO_SOCKET (respipe [1]));
80	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
81		457
82	sigfillset (&fullsigset);	458	#ifdef _WIN32
83	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	459	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		460	#else
		461	if (pipe (respipe))
		462	#endif
		463	croak ("unable to initialize result pipe");
84		464
85	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	465	if (old_readfd >= 0)
86	started++;
87
88	sigprocmask (SIG_SETMASK, &oldsigset, 0);
89	}
90
91	static void
92	send_req (aio_req req)
93	{
94	nreqs++;
95
96	pthread_mutex_lock (&reqlock);
97
98	req->next = 0;
99
100	if (reqe)
101	{	466	{
102	reqe->next = req;	467	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
103	reqe = req;	468	croak ("unable to initialize result pipe(2)");
		469
		470	respipe_close (respipe [0]);
		471	respipe [0] = old_readfd;
104	}	472	}
105	else
106	reqe = reqs = req;
107		473
108	pthread_cond_signal (&reqwait);	474	#ifdef _WIN32
109	pthread_mutex_unlock (&reqlock);	475	int arg = 1;
110	}	476	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		477	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		478	#else
		479	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		480	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		481	#endif
		482	croak ("unable to initialize result pipe(3)");
111		483
112	static void	484	respipe_osf [0] = TO_SOCKET (respipe [0]);
113	end_thread (void)	485	respipe_osf [1] = TO_SOCKET (respipe [1]);
114	{
115	aio_req req;
116	New (0, req, 1, aio_cb);
117	req->type = REQ_QUIT;
118
119	send_req (req);
120	}	486	}
121		487
122	static void	488	static void poll_wait (void)
123	read_write (pTHX_
124	int dowrite, int fd, off_t offset, size_t length,
125	SV *data, STRLEN dataoffset, SV *callback)
126	{	489	{
127	aio_req req;	490	fd_set rfd;
128	STRLEN svlen;
129	char *svptr = SvPV (data, svlen);
130		491
131	SvUPGRADE (data, SVt_PV);	492	while (eio_nreqs ())
132	SvPOK_on (data);
133
134	if (dataoffset < 0)
135	dataoffset += svlen;
136
137	if (dataoffset < 0 || dataoffset > svlen)
138	croak ("data offset outside of string");
139
140	if (dowrite)
141	{	493	{
142	/* write: check length and adjust. */	494	int size;
143	if (length < 0 || length + dataoffset > svlen)	495
144	length = svlen - dataoffset;	496	X_LOCK (reslock);
		497	size = res_queue.size;
		498	X_UNLOCK (reslock);
		499
		500	if (size)
		501	return;
		502
		503	etp_maybe_start_thread ();
		504
		505	FD_ZERO (&rfd);
		506	FD_SET (respipe [0], &rfd);
		507
		508	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
145	}	509	}
146	else
147	{
148	/* read: grow scalar as necessary */
149	svptr = SvGROW (data, length + dataoffset);
150	}
151
152	if (length < 0)
153	croak ("length must not be negative");
154
155	Newz (0, req, 1, aio_cb);
156
157	if (!req)
158	croak ("out of memory during aio_req allocation");
159
160	req->type = dowrite ? REQ_WRITE : REQ_READ;
161	req->fd = fd;
162	req->offset = offset;
163	req->length = length;
164	req->data = SvREFCNT_inc (data);
165	req->dataptr = (char *)svptr + dataoffset;
166	req->callback = SvREFCNT_inc (callback);
167
168	send_req (req);
169	}	510	}
170		511
171	static void	512	static int poll_cb (void)
172	poll_wait ()
173	{	513	{
174	if (!nreqs)
175	return;
176
177	fd_set rfd;
178	FD_ZERO(&rfd);
179	FD_SET(respipe [0], &rfd);
180
181	select (respipe [0] + 1, &rfd, 0, 0, 0);
182	}
183
184	static int
185	poll_cb (pTHX)
186	{
187	dSP;
188	int count = 0;
189	aio_req req;
190
191	{
192	/* read and signals sent by the worker threads */
193	char buf [32];
194	while (read (respipe [0], buf, 32) > 0)
195	;
196	}
197
198	for (;;)	514	for (;;)
199	{	515	{
200	pthread_mutex_lock (&reslock);	516	int res = eio_poll ();
201		517
202	req = ress;
203
204	if (ress)	518	if (res > 0)
205	{
206	ress = ress->next;
207	if (!ress) rese = 0;
208	}
209
210	pthread_mutex_unlock (&reslock);
211
212	if (!req)
213	break;	519	croak (0);
214		520
215	nreqs--;	521	if (!max_outstanding || max_outstanding > eio_nreqs ())
		522	return res;
216		523
217	if (req->type == REQ_QUIT)	524	poll_wait ();
218	started--;
219	else
220	{
221	int errorno = errno;
222	errno = req->errorno;
223
224	if (req->type == REQ_READ)
225	SvCUR_set (req->data, req->dataoffset
226	+ req->result > 0 ? req->result : 0);
227
228	if (req->data)
229	SvREFCNT_dec (req->data);
230
231	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
232	{
233	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
234	PL_laststatval = req->result;
235	PL_statcache = *(req->statdata);
236
237	Safefree (req->statdata);
238	}
239
240	PUSHMARK (SP);
241	XPUSHs (sv_2mortal (newSViv (req->result)));
242
243	if (req->type == REQ_OPEN)
244	{
245	/* convert fd to fh */
246	SV *fh;
247
248	PUTBACK;
249	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
250	SPAGAIN;
251
252	fh = POPs;
253
254	PUSHMARK (SP);
255	XPUSHs (fh);
256	}
257
258	PUTBACK;
259	call_sv (req->callback, G_VOID | G_EVAL);
260	SPAGAIN;
261
262	if (req->callback)
263	SvREFCNT_dec (req->callback);
264
265	errno = errorno;
266	count++;
267	}
268
269	Safefree (req);
270	}	525	}
271
272	return count;
273	}	526	}
274		527
		528	static void atfork_child (void)
		529	{
		530	create_respipe ();
		531	}
		532
275	static void *	533	static SV *
276	aio_proc (void *thr_arg)	534	get_cb (SV *cb_sv)
277	{	535	{
		536	HV *st;
		537	GV *gvp;
		538	CV *cv;
		539
		540	if (!SvOK (cb_sv))
		541	return 0;
		542
		543	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		544
		545	if (!cv)
		546	croak ("IO::AIO callback must be undef or a CODE reference");
		547
		548	return (SV *)cv;
		549	}
		550
		551	#define dREQ \
		552	SV *cb_cv; \
278	aio_req req;	553	aio_req req; \
279	int type;	554	int req_pri = next_pri; \
		555	next_pri = EIO_PRI_DEFAULT; \
		556	\
		557	cb_cv = get_cb (callback); \
		558	\
		559	Newz (0, req, 1, eio_req); \
		560	if (!req) \
		561	croak ("out of memory during eio_req allocation"); \
		562	\
		563	req->callback = SvREFCNT_inc (cb_cv); \
		564	req->pri = req_pri
280		565
281	do	566	#define REQ_SEND \
282	{	567	PUTBACK; \
283	pthread_mutex_lock (&reqlock);	568	req_submit (req); \
		569	SPAGAIN; \
		570	\
		571	if (GIMME_V != G_VOID) \
		572	XPUSHs (req_sv (req, AIO_REQ_KLASS));
284		573
285	for (;;)	574	static int
286	{	575	extract_fd (SV *fh, int wr)
287	req = reqs;	576	{
		577	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
288		578
289	if (reqs)	579	if (fd < 0)
290	{	580	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
291	reqs = reqs->next;
292	if (!reqs) reqe = 0;
293	}
294		581
295	if (req)	582	return fd;
296	break;	583	}
297		584
298	pthread_cond_wait (&reqwait, &reqlock);	585	MODULE = IO::AIO PACKAGE = IO::AIO
299	}
300		586
301	pthread_mutex_unlock (&reqlock);	587	PROTOTYPES: ENABLE
302
303	errno = 0; /* strictly unnecessary */
304		588
305	type = req->type;	589	BOOT:
306		590	{
307	switch (type)	591	static const struct {
308	{	592	const char *name;
309	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	593	IV iv;
310	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;	594	} *civ, const_iv[] = {
311	#if SYS_readahead	595	# define const_iv(name, value) { # name, (IV) value },
312	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	596	# define const_eio(name) { # name, (IV) EIO_ ## name },
313	#else	597	const_iv (EXDEV , EXDEV)
314	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;	598	const_iv (ENOSYS , ENOSYS)
		599	const_iv (O_RDONLY, O_RDONLY)
		600	const_iv (O_WRONLY, O_WRONLY)
		601	const_iv (O_CREAT , O_CREAT)
		602	const_iv (O_TRUNC , O_TRUNC)
		603	#ifndef _WIN32
		604	const_iv (S_IFIFO , S_IFIFO)
315	#endif	605	#endif
		606	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		607	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		608	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		609	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		610	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		611	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
316		612
317	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	613	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
318	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	614	const_eio (SYNC_FILE_RANGE_WRITE)
319	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	615	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
320		616
321	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	617	const_eio (READDIR_DENTS)
322	case REQ_CLOSE: req->result = close (req->fd); break;	618	const_eio (READDIR_DIRS_FIRST)
323	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	619	const_eio (READDIR_STAT_ORDER)
		620	const_eio (READDIR_FOUND_UNKNOWN)
324		621
325	case REQ_FSYNC: req->result = fsync (req->fd); break;	622	const_eio (DT_UNKNOWN)
326	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	623	const_eio (DT_FIFO)
		624	const_eio (DT_CHR)
		625	const_eio (DT_DIR)
		626	const_eio (DT_BLK)
		627	const_eio (DT_REG)
		628	const_eio (DT_LNK)
		629	const_eio (DT_SOCK)
		630	const_eio (DT_WHT)
		631	};
327		632
328	case REQ_QUIT:	633	stash = gv_stashpv ("IO::AIO", 1);
329	break;
330		634
331	default:	635	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
332	req->result = ENOSYS;	636	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
333	break;
334	}
335		637
336	req->errorno = errno;	638	create_respipe ();
337		639
338	pthread_mutex_lock (&reslock);	640	if (eio_init (want_poll, done_poll) < 0)
		641	croak ("IO::AIO: unable to initialise eio library");
339		642
340	req->next = 0;	643	/* atfork child called in fifo order, so before eio's handler */
341		644	X_THREAD_ATFORK (0, 0, atfork_child);
342	if (rese)
343	{
344	rese->next = req;
345	rese = req;
346	}
347	else
348	{
349	rese = ress = req;
350
351	/* write a dummy byte to the pipe so fh becomes ready */
352	write (respipe [1], &respipe, 1);
353	}
354
355	pthread_mutex_unlock (&reslock);
356	}
357	while (type != REQ_QUIT);
358
359	return 0;
360	}	645	}
361		646
362	MODULE = IO::AIO PACKAGE = IO::AIO
363
364	BOOT:
365	{
366	if (pipe (respipe))
367	croak ("unable to initialize result pipe");
368
369	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
370	croak ("cannot set result pipe to nonblocking mode");
371
372	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
373	croak ("cannot set result pipe to nonblocking mode");
374	}
375
376	void	647	void
377	min_parallel(nthreads)	648	max_poll_reqs (int nreqs)
378	int nthreads
379	PROTOTYPE: $	649	PROTOTYPE: $
380	CODE:	650	CODE:
381	while (nthreads > started)	651	eio_set_max_poll_reqs (nreqs);
382	start_thread ();
383		652
384	void	653	void
385	max_parallel(nthreads)	654	max_poll_time (double nseconds)
386	int nthreads
387	PROTOTYPE: $	655	PROTOTYPE: $
388	CODE:	656	CODE:
		657	eio_set_max_poll_time (nseconds);
		658
		659	void
		660	min_parallel (int nthreads)
		661	PROTOTYPE: $
		662	CODE:
		663	eio_set_min_parallel (nthreads);
		664
		665	void
		666	max_parallel (int nthreads)
		667	PROTOTYPE: $
		668	CODE:
		669	eio_set_max_parallel (nthreads);
		670
		671	void
		672	max_idle (int nthreads)
		673	PROTOTYPE: $
		674	CODE:
		675	eio_set_max_idle (nthreads);
		676
		677	void
		678	max_outstanding (int maxreqs)
		679	PROTOTYPE: $
		680	CODE:
		681	max_outstanding = maxreqs;
		682
		683	void
		684	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		685	PROTOTYPE: $$$;$
		686	PPCODE:
389	{	687	{
390	int cur = started;	688	dREQ;
391	while (cur > nthreads)	689
392	{	690	req->type = EIO_OPEN;
393	end_thread ();	691	req->sv1 = newSVsv (pathname);
		692	req->ptr1 = SvPVbyte_nolen (req->sv1);
		693	req->int1 = flags;
		694	req->int2 = mode;
		695
		696	REQ_SEND;
		697	}
		698
		699	void
		700	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		701	PROTOTYPE: $;$
		702	ALIAS:
		703	aio_fsync = EIO_FSYNC
		704	aio_fdatasync = EIO_FDATASYNC
		705	PPCODE:
		706	{
		707	int fd = extract_fd (fh, 0);
		708	dREQ;
		709
		710	req->type = ix;
		711	req->sv1 = newSVsv (fh);
		712	req->int1 = fd;
		713
		714	REQ_SEND (req);
		715	}
		716
		717	void
		718	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		719	PROTOTYPE: $$$$;$
		720	PPCODE:
		721	{
		722	int fd = extract_fd (fh, 0);
		723	dREQ;
		724
		725	req->type = EIO_SYNC_FILE_RANGE;
		726	req->sv1 = newSVsv (fh);
		727	req->int1 = fd;
		728	req->offs = offset;
		729	req->size = nbytes;
		730	req->int2 = flags;
		731
		732	REQ_SEND (req);
		733	}
		734
		735	void
		736	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		737	PROTOTYPE: $;$
		738	PPCODE:
		739	{
		740	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		741	int fd = extract_fd (fh, 0);
		742	dREQ;
		743
		744	if (close_pipe < 0)
		745	{
		746	int pipefd [2];
		747
		748	if (pipe (pipefd) < 0
		749	|| close (pipefd [1]) < 0
		750	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		751	abort (); /*D*/
		752
		753	close_pipe = pipefd [0];
		754	}
		755
		756	req->type = EIO_DUP2;
		757	req->int1 = close_pipe;
		758	req->sv2 = newSVsv (fh);
		759	req->int2 = fd;
		760
		761	REQ_SEND (req);
		762	}
		763
		764	void
		765	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		766	ALIAS:
		767	aio_read = EIO_READ
		768	aio_write = EIO_WRITE
		769	PROTOTYPE: $$$$$;$
		770	PPCODE:
		771	{
		772	STRLEN svlen;
		773	int fd = extract_fd (fh, ix == EIO_WRITE);
		774	char *svptr = SvPVbyte (data, svlen);
		775	UV len = SvUV (length);
		776
		777	if (dataoffset < 0)
		778	dataoffset += svlen;
		779
		780	if (dataoffset < 0 || dataoffset > svlen)
		781	croak ("dataoffset outside of data scalar");
		782
		783	if (ix == EIO_WRITE)
		784	{
		785	/* write: check length and adjust. */
		786	if (!SvOK (length) || len + dataoffset > svlen)
		787	len = svlen - dataoffset;
		788	}
		789	else
		790	{
		791	/* read: check type and grow scalar as necessary */
		792	SvUPGRADE (data, SVt_PV);
		793	svptr = SvGROW (data, len + dataoffset + 1);
		794	}
		795
		796	{
		797	dREQ;
		798
		799	req->type = ix;
		800	req->sv1 = newSVsv (fh);
		801	req->int1 = fd;
		802	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		803	req->size = len;
		804	req->sv2 = SvREFCNT_inc (data);
		805	req->ptr2 = (char *)svptr + dataoffset;
		806	req->stroffset = dataoffset;
		807
		808	if (!SvREADONLY (data))
394	cur--;	809	{
		810	SvREADONLY_on (data);
		811	req->flags |= FLAG_SV2_RO_OFF;
395	}	812	}
396		813
397	while (started > nthreads)	814	REQ_SEND;
		815	}
		816	}
		817
		818	void
		819	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		820	PROTOTYPE: $$;$
		821	PPCODE:
		822	{
		823	SV *data;
		824	dREQ;
		825
		826	req->type = EIO_READLINK;
		827	req->sv1 = newSVsv (path);
		828	req->ptr1 = SvPVbyte_nolen (req->sv1);
		829
		830	REQ_SEND;
		831	}
		832
		833	void
		834	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		835	PROTOTYPE: $$$$;$
		836	PPCODE:
		837	{
		838	int ifd = extract_fd (in_fh , 0);
		839	int ofd = extract_fd (out_fh, 0);
		840	dREQ;
		841
		842	req->type = EIO_SENDFILE;
		843	req->sv1 = newSVsv (out_fh);
		844	req->int1 = ofd;
		845	req->sv2 = newSVsv (in_fh);
		846	req->int2 = ifd;
		847	req->offs = in_offset;
		848	req->size = length;
		849
		850	REQ_SEND;
		851	}
		852
		853	void
		854	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		855	PROTOTYPE: $$$;$
		856	PPCODE:
		857	{
		858	int fd = extract_fd (fh, 0);
		859	dREQ;
		860
		861	req->type = EIO_READAHEAD;
		862	req->sv1 = newSVsv (fh);
		863	req->int1 = fd;
		864	req->offs = offset;
		865	req->size = length;
		866
		867	REQ_SEND;
		868	}
		869
		870	void
		871	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		872	ALIAS:
		873	aio_stat = EIO_STAT
		874	aio_lstat = EIO_LSTAT
		875	PPCODE:
		876	{
		877	dREQ;
		878
		879	req->sv1 = newSVsv (fh_or_path);
		880
		881	if (SvPOK (req->sv1))
		882	{
		883	req->type = ix;
		884	req->ptr1 = SvPVbyte_nolen (req->sv1);
		885	}
		886	else
		887	{
		888	req->type = EIO_FSTAT;
		889	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		890	}
		891
		892	REQ_SEND;
		893	}
		894
		895	void
		896	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		897	PPCODE:
		898	{
		899	dREQ;
		900
		901	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		902	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		903	req->sv1 = newSVsv (fh_or_path);
		904
		905	if (SvPOK (req->sv1))
		906	{
		907	req->type = EIO_UTIME;
		908	req->ptr1 = SvPVbyte_nolen (req->sv1);
		909	}
		910	else
		911	{
		912	req->type = EIO_FUTIME;
		913	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		914	}
		915
		916	REQ_SEND;
		917	}
		918
		919	void
		920	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		921	PPCODE:
		922	{
		923	dREQ;
		924
		925	req->sv1 = newSVsv (fh_or_path);
		926	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		927
		928	if (SvPOK (req->sv1))
		929	{
		930	req->type = EIO_TRUNCATE;
		931	req->ptr1 = SvPVbyte_nolen (req->sv1);
		932	}
		933	else
		934	{
		935	req->type = EIO_FTRUNCATE;
		936	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		937	}
		938
		939	REQ_SEND;
		940	}
		941
		942	void
		943	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		944	ALIAS:
		945	aio_chmod = EIO_CHMOD
		946	aio_mkdir = EIO_MKDIR
		947	PPCODE:
		948	{
		949	dREQ;
		950
		951	req->int2 = mode;
		952	req->sv1 = newSVsv (fh_or_path);
		953
		954	if (SvPOK (req->sv1))
		955	{
		956	req->type = ix;
		957	req->ptr1 = SvPVbyte_nolen (req->sv1);
		958	}
		959	else
		960	{
		961	req->type = EIO_FCHMOD;
		962	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		963	}
		964
		965	REQ_SEND;
		966	}
		967
		968	void
		969	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		970	PPCODE:
		971	{
		972	dREQ;
		973
		974	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		975	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		976	req->sv1 = newSVsv (fh_or_path);
		977
		978	if (SvPOK (req->sv1))
		979	{
		980	req->type = EIO_CHOWN;
		981	req->ptr1 = SvPVbyte_nolen (req->sv1);
		982	}
		983	else
		984	{
		985	req->type = EIO_FCHOWN;
		986	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		987	}
		988
		989	REQ_SEND;
		990	}
		991
		992	void
		993	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		994	PPCODE:
		995	{
		996	dREQ;
		997
		998	req->type = EIO_READDIR;
		999	req->sv1 = newSVsv (pathname);
		1000	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1001	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1002
		1003	if (flags & EIO_READDIR_DENTS)
		1004	req->int1 |= EIO_READDIR_CUSTOM2;
		1005
		1006	REQ_SEND;
		1007	}
		1008
		1009	void
		1010	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1011	ALIAS:
		1012	aio_unlink = EIO_UNLINK
		1013	aio_rmdir = EIO_RMDIR
		1014	aio_readdir = EIO_READDIR
		1015	PPCODE:
		1016	{
		1017	dREQ;
		1018
		1019	req->type = ix;
		1020	req->sv1 = newSVsv (pathname);
		1021	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1022
		1023	REQ_SEND;
		1024	}
		1025
		1026	void
		1027	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1028	ALIAS:
		1029	aio_link = EIO_LINK
		1030	aio_symlink = EIO_SYMLINK
		1031	aio_rename = EIO_RENAME
		1032	PPCODE:
		1033	{
		1034	dREQ;
		1035
		1036	req->type = ix;
		1037	req->sv1 = newSVsv (oldpath);
		1038	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1039	req->sv2 = newSVsv (newpath);
		1040	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1041
		1042	REQ_SEND;
		1043	}
		1044
		1045	void
		1046	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1047	PPCODE:
		1048	{
		1049	dREQ;
		1050
		1051	req->type = EIO_MKNOD;
		1052	req->sv1 = newSVsv (pathname);
		1053	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1054	req->int2 = (mode_t)mode;
		1055	req->offs = dev;
		1056
		1057	REQ_SEND;
		1058	}
		1059
		1060	void
		1061	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1062	PPCODE:
		1063	{
		1064	dREQ;
		1065
		1066	req->type = EIO_BUSY;
		1067	req->nv1 = delay < 0. ? 0. : delay;
		1068
		1069	REQ_SEND;
		1070	}
		1071
		1072	void
		1073	aio_group (SV *callback=&PL_sv_undef)
		1074	PROTOTYPE: ;$
		1075	PPCODE:
		1076	{
		1077	dREQ;
		1078
		1079	req->type = EIO_GROUP;
		1080
		1081	req_submit (req);
		1082	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1083	}
		1084
		1085	void
		1086	aio_nop (SV *callback=&PL_sv_undef)
		1087	ALIAS:
		1088	aio_nop = EIO_NOP
		1089	aio_sync = EIO_SYNC
		1090	PPCODE:
		1091	{
		1092	dREQ;
		1093
		1094	req->type = ix;
		1095
		1096	REQ_SEND;
		1097	}
		1098
		1099	int
		1100	aioreq_pri (int pri = 0)
		1101	PROTOTYPE: ;$
		1102	CODE:
		1103	RETVAL = next_pri;
		1104	if (items > 0)
		1105	{
		1106	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1107	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1108	next_pri = pri;
		1109	}
		1110	OUTPUT:
		1111	RETVAL
		1112
		1113	void
		1114	aioreq_nice (int nice = 0)
		1115	CODE:
		1116	nice = next_pri - nice;
		1117	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1118	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1119	next_pri = nice;
		1120
		1121	void
		1122	flush ()
		1123	PROTOTYPE:
		1124	CODE:
		1125	while (eio_nreqs ())
398	{	1126	{
399	poll_wait ();	1127	poll_wait ();
400	poll_cb (aTHX);	1128	poll_cb ();
401	}
402	}
403
404	void
405	aio_open(pathname,flags,mode,callback)
406	SV * pathname
407	int flags
408	int mode
409	SV * callback
410	PROTOTYPE: $$$$
411	CODE:
412	{
413	aio_req req;
414
415	Newz (0, req, 1, aio_cb);
416
417	if (!req)
418	croak ("out of memory during aio_req allocation");
419
420	req->type = REQ_OPEN;
421	req->data = newSVsv (pathname);
422	req->dataptr = SvPV_nolen (req->data);
423	req->fd = flags;
424	req->mode = mode;
425	req->callback = SvREFCNT_inc (callback);
426
427	send_req (req);
428	}
429
430	void
431	aio_close(fh,callback)
432	InputStream fh
433	SV * callback
434	PROTOTYPE: $$
435	ALIAS:
436	aio_close = REQ_CLOSE
437	aio_fsync = REQ_FSYNC
438	aio_fdatasync = REQ_FDATASYNC
439	CODE:
440	{
441	aio_req req;
442
443	Newz (0, req, 1, aio_cb);
444
445	if (!req)
446	croak ("out of memory during aio_req allocation");
447
448	req->type = ix;
449	req->fd = PerlIO_fileno (fh);
450	req->callback = SvREFCNT_inc (callback);
451
452	send_req (req);
453	}
454
455	void
456	aio_read(fh,offset,length,data,dataoffset,callback)
457	InputStream fh
458	UV offset
459	IV length
460	SV * data
461	IV dataoffset
462	SV * callback
463	PROTOTYPE: $$$$$$
464	CODE:
465	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
466
467	void
468	aio_write(fh,offset,length,data,dataoffset,callback)
469	OutputStream fh
470	UV offset
471	IV length
472	SV * data
473	IV dataoffset
474	SV * callback
475	PROTOTYPE: $$$$$$
476	CODE:
477	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
478
479	void
480	aio_readahead(fh,offset,length,callback)
481	InputStream fh
482	UV offset
483	IV length
484	SV * callback
485	PROTOTYPE: $$$$
486	CODE:
487	{
488	aio_req req;
489
490	if (length < 0)
491	croak ("length must not be negative");
492
493	Newz (0, req, 1, aio_cb);
494
495	if (!req)
496	croak ("out of memory during aio_req allocation");
497
498	req->type = REQ_READAHEAD;
499	req->fd = PerlIO_fileno (fh);
500	req->offset = offset;
501	req->length = length;
502	req->callback = SvREFCNT_inc (callback);
503
504	send_req (req);
505	}
506
507	void
508	aio_stat(fh_or_path,callback)
509	SV * fh_or_path
510	SV * callback
511	PROTOTYPE: $$
512	ALIAS:
513	aio_lstat = 1
514	CODE:
515	{
516	aio_req req;
517
518	Newz (0, req, 1, aio_cb);
519
520	if (!req)
521	croak ("out of memory during aio_req allocation");
522
523	New (0, req->statdata, 1, Stat_t);
524
525	if (!req->statdata)
526	croak ("out of memory during aio_req->statdata allocation");
527
528	if (SvPOK (fh_or_path))
529	{	1129	}
530	req->type = ix ? REQ_LSTAT : REQ_STAT;
531	req->data = newSVsv (fh_or_path);
532	req->dataptr = SvPV_nolen (req->data);
533	}
534	else
535	{
536	req->type = REQ_FSTAT;
537	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
538	}
539		1130
540	req->callback = SvREFCNT_inc (callback);	1131	int
541		1132	poll()
542	send_req (req);
543	}
544
545	void
546	aio_unlink(pathname,callback)
547	SV * pathname
548	SV * callback
549	PROTOTYPE: $$	1133	PROTOTYPE:
550	CODE:	1134	CODE:
551	{	1135	poll_wait ();
552	aio_req req;	1136	RETVAL = poll_cb ();
553		1137	OUTPUT:
554	Newz (0, req, 1, aio_cb);	1138	RETVAL
555
556	if (!req)
557	croak ("out of memory during aio_req allocation");
558
559	req->type = REQ_UNLINK;
560	req->data = newSVsv (pathname);
561	req->dataptr = SvPV_nolen (req->data);
562	req->callback = SvREFCNT_inc (callback);
563
564	send_req (req);
565	}
566		1139
567	int	1140	int
568	poll_fileno()	1141	poll_fileno()
569	PROTOTYPE:	1142	PROTOTYPE:
570	CODE:	1143	CODE:
…		…
574		1147
575	int	1148	int
576	poll_cb(...)	1149	poll_cb(...)
577	PROTOTYPE:	1150	PROTOTYPE:
578	CODE:	1151	CODE:
579	RETVAL = poll_cb (aTHX);	1152	RETVAL = poll_cb ();
580	OUTPUT:	1153	OUTPUT:
581	RETVAL	1154	RETVAL
582		1155
583	void	1156	void
584	poll_wait()	1157	poll_wait()
585	PROTOTYPE:	1158	PROTOTYPE:
586	CODE:	1159	CODE:
587	if (nreqs)
588	poll_wait ();	1160	poll_wait ();
589		1161
590	int	1162	int
591	nreqs()	1163	nreqs()
592	PROTOTYPE:	1164	PROTOTYPE:
593	CODE:	1165	CODE:
594	RETVAL = nreqs;	1166	RETVAL = eio_nreqs ();
595	OUTPUT:	1167	OUTPUT:
596	RETVAL	1168	RETVAL
597		1169
		1170	int
		1171	nready()
		1172	PROTOTYPE:
		1173	CODE:
		1174	RETVAL = eio_nready ();
		1175	OUTPUT:
		1176	RETVAL
		1177
		1178	int
		1179	npending()
		1180	PROTOTYPE:
		1181	CODE:
		1182	RETVAL = eio_npending ();
		1183	OUTPUT:
		1184	RETVAL
		1185
		1186	int
		1187	nthreads()
		1188	PROTOTYPE:
		1189	CODE:
		1190	RETVAL = eio_nthreads ();
		1191	OUTPUT:
		1192	RETVAL
		1193
		1194	int
		1195	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1196	PROTOTYPE: $$$$
		1197	CODE:
		1198	{
		1199	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1200	RETVAL = posix_fadvise (fh, offset, length, advice);
		1201	#else
		1202	RETVAL = errno = ENOSYS;
		1203	#endif
		1204	}
		1205	OUTPUT:
		1206	RETVAL
		1207
		1208	ssize_t
		1209	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1210	PROTOTYPE: $$$$
		1211	CODE:
		1212	eio_sendfile_sync (ofh, ifh, offset, count);
		1213
		1214	void _on_next_submit (SV *cb)
		1215	CODE:
		1216	SvREFCNT_dec (on_next_submit);
		1217	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1218
		1219	PROTOTYPES: DISABLE
		1220
		1221	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1222
		1223	void
		1224	cancel (aio_req_ornot req)
		1225	CODE:
		1226	eio_cancel (req);
		1227
		1228	void
		1229	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1230	PPCODE:
		1231	{
		1232	if (GIMME_V != G_VOID)
		1233	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1234
		1235	if (items > 1)
		1236	{
		1237	SV *cb_cv = get_cb (callback);
		1238
		1239	SvREFCNT_dec (req->callback);
		1240	req->callback = SvREFCNT_inc (cb_cv);
		1241	}
		1242	}
		1243
		1244	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1245
		1246	void
		1247	add (aio_req grp, ...)
		1248	PPCODE:
		1249	{
		1250	int i;
		1251
		1252	if (grp->int1 == 2)
		1253	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1254
		1255	for (i = 1; i < items; ++i )
		1256	{
		1257	aio_req req;
		1258
		1259	if (GIMME_V != G_VOID)
		1260	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1261
		1262	req = SvAIO_REQ (ST (i));
		1263
		1264	if (req)
		1265	eio_grp_add (grp, req);
		1266	}
		1267	}
		1268
		1269	void
		1270	cancel_subs (aio_req_ornot req)
		1271	CODE:
		1272	req_cancel_subs (req);
		1273
		1274	void
		1275	result (aio_req grp, ...)
		1276	CODE:
		1277	{
		1278	int i;
		1279	AV *av;
		1280
		1281	grp->errorno = errno;
		1282
		1283	av = newAV ();
		1284	av_extend (av, items - 1);
		1285
		1286	for (i = 1; i < items; ++i )
		1287	av_push (av, newSVsv (ST (i)));
		1288
		1289	SvREFCNT_dec (grp->sv1);
		1290	grp->sv1 = (SV *)av;
		1291	}
		1292
		1293	void
		1294	errno (aio_req grp, int errorno = errno)
		1295	CODE:
		1296	grp->errorno = errorno;
		1297
		1298	void
		1299	limit (aio_req grp, int limit)
		1300	CODE:
		1301	eio_grp_limit (grp, limit);
		1302
		1303	void
		1304	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1305	CODE:
		1306	{
		1307	SvREFCNT_dec (grp->sv2);
		1308	grp->sv2 = newSVsv (callback);
		1309	grp->feed = aio_grp_feed;
		1310
		1311	if (grp->int2 <= 0)
		1312	grp->int2 = 2;
		1313
		1314	eio_grp_limit (grp, grp->int2);
		1315	}
		1316

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