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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.16 by root, Sun Jul 31 18:20:07 2005 UTC vs.
Revision 1.158 by root, Sat Jan 2 14:11:32 2010 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	#include "autoconf/config.h"	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		19
15	#include <pthread.h>	20	/* perl namespace pollution */
		21	#undef VERSION
16		22
17	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	23	#ifdef _WIN32
18	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
19	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
20		24
21	#if __ia64	25	# define EIO_STRUCT_DIRENT Direntry_t
22	# 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
23	#else	61	#else
24	# 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
25	#endif	70	#endif
26		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	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		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
27	enum {	150	enum {
28	REQ_QUIT,	151	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
29	REQ_OPEN, REQ_CLOSE,
30	REQ_READ, REQ_WRITE, REQ_READAHEAD,
31	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
32	REQ_FSYNC, REQ_FDATASYNC,
33	};	152	};
34		153
35	typedef struct aio_cb {	154	#include "libeio/eio.c"
36	struct aio_cb *volatile next;
37		155
38	int type;
39
40	int fd;
41	off_t offset;
42	size_t length;
43	ssize_t result;
44	mode_t mode; /* open */
45	int errorno;
46	SV *data, *callback, *fh;
47	void *dataptr;
48	STRLEN dataoffset;
49
50	Stat_t *statdata;
51	} aio_cb;
52
53	typedef aio_cb *aio_req;	156	typedef eio_req *aio_req;
		157	typedef eio_req *aio_req_ornot;
54		158
55	static int started;	159	static SV *on_next_submit;
56	static volatile int nreqs;	160	static int next_pri = EIO_PRI_DEFAULT;
57	static int max_outstanding = 1<<30;	161	static int max_outstanding;
58	static int respipe [2];
59		162
60	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	163	static s_epipe respipe;
61	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
62	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
63		164
64	static volatile aio_req reqs, reqe; /* queue start, queue end */	165	static void req_destroy (aio_req req);
65	static volatile aio_req ress, rese; /* queue start, queue end */	166	static void req_cancel (aio_req req);
66		167
67	static void	168	static void want_poll (void)
68	poll_wait ()
69	{	169	{
70	if (nreqs && !ress)	170	/* write a dummy byte to the pipe so fh becomes ready */
		171	s_epipe_signal (&respipe);
		172	}
		173
		174	static void done_poll (void)
		175	{
		176	/* read any signals sent by the worker threads */
		177	s_epipe_drain (&respipe);
		178	}
		179
		180	/* must be called at most once */
		181	static SV *req_sv (aio_req req, HV *stash)
		182	{
		183	if (!req->self)
71	{	184	{
72	fd_set rfd;	185	req->self = (SV *)newHV ();
73	FD_ZERO(&rfd);	186	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
74	FD_SET(respipe [0], &rfd);
75
76	select (respipe [0] + 1, &rfd, 0, 0, 0);
77	}	187	}
78	}
79		188
80	static int	189	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
81	poll_cb ()	190	}
		191
		192	static aio_req SvAIO_REQ (SV *sv)
		193	{
		194	MAGIC *mg;
		195
		196	if (!SvROK (sv)
		197	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		198	&& SvSTASH (SvRV (sv)) != aio_req_stash
		199	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		200	croak ("object of class IO::AIO::REQ expected");
		201
		202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		203
		204	return mg ? (aio_req)mg->mg_ptr : 0;
		205	}
		206
		207	static void aio_grp_feed (aio_req grp)
		208	{
		209	if (grp->sv2 && SvOK (grp->sv2))
		210	{
		211	dSP;
		212
		213	ENTER;
		214	SAVETMPS;
		215	PUSHMARK (SP);
		216	XPUSHs (req_sv (grp, aio_grp_stash));
		217	PUTBACK;
		218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		219	SPAGAIN;
		220	FREETMPS;
		221	LEAVE;
		222	}
		223	}
		224
		225	static void req_submit (eio_req *req)
		226	{
		227	eio_submit (req);
		228
		229	if (expect_false (on_next_submit))
		230	{
		231	dSP;
		232	SV *cb = sv_2mortal (on_next_submit);
		233
		234	on_next_submit = 0;
		235
		236	PUSHMARK (SP);
		237	PUTBACK;
		238	call_sv (cb, G_DISCARD | G_EVAL);
		239	}
		240	}
		241
		242	static int req_invoke (eio_req *req)
82	{	243	{
83	dSP;	244	dSP;
84	int count = 0;
85	aio_req req, prv;
86		245
87	pthread_mutex_lock (&reslock);	246	if (req->flags & FLAG_SV2_RO_OFF)
		247	SvREADONLY_off (req->sv2);
88		248
89	{	249	if (!EIO_CANCELLED (req) && req->callback)
90	/* read any signals sent by the worker threads */
91	char buf [32];
92	while (read (respipe [0], buf, 32) > 0)
93	;
94	}
95
96	req = ress;
97	ress = rese = 0;
98
99	pthread_mutex_unlock (&reslock);
100
101	while (req)
102	{	250	{
103	nreqs--;	251	ENTER;
		252	SAVETMPS;
		253	PUSHMARK (SP);
		254	EXTEND (SP, 1);
104		255
105	if (req->type == REQ_QUIT)	256	switch (req->type)
106	started--;
107	else
108	{	257	{
109	int errorno = errno;	258	case EIO_READDIR:
110	errno = req->errorno;
111
112	if (req->type == REQ_READ)
113	SvCUR_set (req->data, req->dataoffset
114	+ req->result > 0 ? req->result : 0);
115
116	if (req->data)
117	SvREFCNT_dec (req->data);
118
119	if (req->fh)
120	SvREFCNT_dec (req->fh);
121
122	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
123	{	259	{
124	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	260	SV *rv = &PL_sv_undef;
125	PL_laststatval = req->result;
126	PL_statcache = *(req->statdata);
127		261
128	Safefree (req->statdata);	262	if (req->result >= 0)
		263	{
		264	int i;
		265	char *names = (char *)req->ptr2;
		266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		267	AV *av = newAV ();
		268
		269	av_extend (av, req->result - 1);
		270
		271	for (i = 0; i < req->result; ++i)
		272	{
		273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		276
		277	if (req->int1 & EIO_READDIR_CUSTOM2)
		278	{
		279	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		280	AV *avent = newAV ();
		281
		282	av_extend (avent, 2);
		283
		284	if (!sv_type [ent->type])
		285	{
		286	sv_type [ent->type] = newSViv (ent->type);
		287	SvREADONLY_on (sv_type [ent->type]);
		288	}
		289
		290	av_store (avent, 0, namesv);
		291	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		292	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		293
		294	av_store (av, i, newRV_noinc ((SV *)avent));
		295	}
		296	else
		297	av_store (av, i, namesv);
		298
		299	++ent;
		300	}
		301	else
		302	{
		303	SV *name = newSVpv (names, 0);
		304	av_store (av, i, name);
		305	names += SvCUR (name) + 1;
		306	}
		307	}
		308
		309	rv = sv_2mortal (newRV_noinc ((SV *)av));
		310	}
		311
		312	PUSHs (rv);
		313
		314	if (req->int1 & EIO_READDIR_CUSTOM1)
		315	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
129	}	316	}
		317	break;
130		318
131	ENTER;	319	case EIO_OPEN:
132	PUSHMARK (SP);
133	XPUSHs (sv_2mortal (newSViv (req->result)));
134
135	if (req->type == REQ_OPEN)
136	{	320	{
137	/* convert fd to fh */	321	/* convert fd to fh */
138	SV *fh;	322	SV *fh = &PL_sv_undef;
139		323
140	PUTBACK;	324	if (req->result >= 0)
141	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	325	{
142	SPAGAIN;	326	GV *gv = (GV *)sv_newmortal ();
		327	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		328	char sym [64];
		329	int symlen;
		330
		331	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		332	gv_init (gv, aio_stash, sym, symlen, 0);
143		333
144	fh = SvREFCNT_inc (POPs);	334	symlen = snprintf (
		335	sym,
		336	sizeof (sym),
		337	"%s&=%d",
		338	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		339	(int)req->result
		340	);
145		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
146	PUSHMARK (SP);	346	PUSHs (fh);
147	XPUSHs (sv_2mortal (fh));
148	}	347	}
		348	break;
149		349
150	if (SvOK (req->callback))	350	case EIO_GROUP:
		351	req->int1 = 2; /* mark group as finished */
		352
		353	if (req->sv1)
		354	{
		355	int i;
		356	AV *av = (AV *)req->sv1;
		357
		358	EXTEND (SP, AvFILL (av) + 1);
		359	for (i = 0; i <= AvFILL (av); ++i)
		360	PUSHs (*av_fetch (av, i, 0));
		361	}
		362	break;
		363
		364	case EIO_NOP:
		365	case EIO_BUSY:
		366	break;
		367
		368	case EIO_READLINK:
		369	if (req->result > 0)
		370	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		371	break;
		372
		373	case EIO_STAT:
		374	case EIO_LSTAT:
		375	case EIO_FSTAT:
		376	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		377	PL_laststatval = req->result;
		378	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		379	PUSHs (sv_2mortal (newSViv (req->result)));
		380	break;
		381
		382	case EIO_READ:
151	{	383	{
152	PUTBACK;	384	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
153	call_sv (req->callback, G_VOID | G_EVAL);	385	*SvEND (req->sv2) = 0;
154	SPAGAIN;	386	SvPOK_only (req->sv2);
		387	SvSETMAGIC (req->sv2);
		388	PUSHs (sv_2mortal (newSViv (req->result)));
155	}	389	}
156
157	LEAVE;
158
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161
162	errno = errorno;
163	count++;
164	}
165
166	prv = req;
167	req = req->next;
168	Safefree (prv);
169
170	/* TODO: croak on errors? */
171	}
172
173	return count;
174	}
175
176	static void *aio_proc(void *arg);
177
178	static void
179	start_thread (void)
180	{
181	sigset_t fullsigset, oldsigset;
182	pthread_t tid;
183	pthread_attr_t attr;
184
185	pthread_attr_init (&attr);
186	pthread_attr_setstacksize (&attr, STACKSIZE);
187	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
188
189	sigfillset (&fullsigset);
190	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
191
192	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
193	started++;
194
195	sigprocmask (SIG_SETMASK, &oldsigset, 0);
196	}
197
198	static void
199	send_req (aio_req req)
200	{
201	nreqs++;
202
203	pthread_mutex_lock (&reqlock);
204
205	req->next = 0;
206
207	if (reqe)
208	{
209	reqe->next = req;
210	reqe = req;
211	}
212	else
213	reqe = reqs = req;
214
215	pthread_cond_signal (&reqwait);
216	pthread_mutex_unlock (&reqlock);
217
218	while (nreqs > max_outstanding)
219	{
220	poll_wait ();
221	poll_cb ();
222	}
223	}
224
225	static void
226	end_thread (void)
227	{
228	aio_req req;
229	New (0, req, 1, aio_cb);
230	req->type = REQ_QUIT;
231
232	send_req (req);
233	}
234
235	static void *
236	aio_proc (void *thr_arg)
237	{
238	aio_req req;
239	int type;
240
241	do
242	{
243	pthread_mutex_lock (&reqlock);
244
245	for (;;)
246	{
247	req = reqs;
248
249	if (reqs)
250	{
251	reqs = reqs->next;
252	if (!reqs) reqe = 0;
253	}
254
255	if (req)
256	break;	390	break;
257		391
258	pthread_cond_wait (&reqwait, &reqlock);
259	}
260
261	pthread_mutex_unlock (&reqlock);
262
263	errno = 0; /* strictly unnecessary */
264
265	type = req->type;
266
267	switch (type)
268	{
269	#if HAVE_PREADWRITE
270	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
271	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
272	#else
273	# error "pread/pwrite cannot be emulated, fix your os"
274	#endif
275
276	#if HAVE_READAHEAD
277	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
278	#else
279	// TODO: emulate
280	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
281	#endif
282
283	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
284	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
285	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
286
287	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
288	case REQ_CLOSE: req->result = close (req->fd); break;
289	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
290
291	case REQ_FDATASYNC:
292	#if HAVE_FDATASYNC
293	req->result = fdatasync (req->fd); break;
294	#endif
295	case REQ_FSYNC: req->result = fsync (req->fd); break;
296
297	case REQ_QUIT:	392	case EIO_DUP2:
298	break;	393	if (req->result > 0)
		394	req->result = 0;
		395	/* FALLTHROUGH */
299		396
300	default:	397	default:
301	req->result = ENOSYS;	398	PUSHs (sv_2mortal (newSViv (req->result)));
302	break;	399	break;
303	}	400	}
304		401
305	req->errorno = errno;	402	errno = req->errorno;
306		403
307	pthread_mutex_lock (&reslock);	404	PUTBACK;
		405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		406	SPAGAIN;
308		407
309	req->next = 0;	408	FREETMPS;
		409	LEAVE;
310		410
311	if (rese)	411	PUTBACK;
312	{
313	rese->next = req;
314	rese = req;
315	}
316	else
317	{
318	rese = ress = req;
319
320	/* write a dummy byte to the pipe so fh becomes ready */
321	write (respipe [1], &respipe, 1);
322	}
323
324	pthread_mutex_unlock (&reslock);
325	}	412	}
326	while (type != REQ_QUIT);
327		413
		414	return !!SvTRUE (ERRSV);
		415	}
		416
		417	static void req_destroy (aio_req req)
		418	{
		419	if (req->self)
		420	{
		421	sv_unmagic (req->self, PERL_MAGIC_ext);
		422	SvREFCNT_dec (req->self);
		423	}
		424
		425	SvREFCNT_dec (req->sv1);
		426	SvREFCNT_dec (req->sv2);
		427	SvREFCNT_dec (req->callback);
		428
		429	Safefree (req);
		430	}
		431
		432	static void req_cancel_subs (aio_req grp)
		433	{
		434	aio_req sub;
		435
		436	if (grp->type != EIO_GROUP)
328	return 0;	437	return;
		438
		439	SvREFCNT_dec (grp->sv2);
		440	grp->sv2 = 0;
		441
		442	eio_grp_cancel (grp);
329	}	443	}
		444
		445	static void
		446	create_respipe (void)
		447	{
		448	if (s_epipe_renew (&respipe))
		449	croak ("IO::AIO: unable to initialize result pipe");
		450	}
		451
		452	static void poll_wait (void)
		453	{
		454	while (eio_nreqs ())
		455	{
		456	int size;
		457
		458	X_LOCK (reslock);
		459	size = res_queue.size;
		460	X_UNLOCK (reslock);
		461
		462	if (size)
		463	return;
		464
		465	etp_maybe_start_thread ();
		466
		467	s_epipe_wait (&respipe);
		468	}
		469	}
		470
		471	static int poll_cb (void)
		472	{
		473	for (;;)
		474	{
		475	int res = eio_poll ();
		476
		477	if (res > 0)
		478	croak (0);
		479
		480	if (!max_outstanding || max_outstanding > eio_nreqs ())
		481	return res;
		482
		483	poll_wait ();
		484	}
		485	}
		486
		487	static void atfork_child (void)
		488	{
		489	create_respipe ();
		490	}
		491
		492	static SV *
		493	get_cb (SV *cb_sv)
		494	{
		495	SvGETMAGIC (cb_sv);
		496	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		497	}
		498
		499	#define dREQ \
		500	SV *cb_cv; \
		501	aio_req req; \
		502	int req_pri = next_pri; \
		503	next_pri = EIO_PRI_DEFAULT; \
		504	\
		505	cb_cv = get_cb (callback); \
		506	\
		507	Newz (0, req, 1, eio_req); \
		508	if (!req) \
		509	croak ("out of memory during eio_req allocation"); \
		510	\
		511	req->callback = SvREFCNT_inc (cb_cv); \
		512	req->pri = req_pri
		513
		514	#define REQ_SEND \
		515	PUTBACK; \
		516	req_submit (req); \
		517	SPAGAIN; \
		518	\
		519	if (GIMME_V != G_VOID) \
		520	XPUSHs (req_sv (req, aio_req_stash));
330		521
331	MODULE = IO::AIO PACKAGE = IO::AIO	522	MODULE = IO::AIO PACKAGE = IO::AIO
332		523
333	PROTOTYPES: ENABLE	524	PROTOTYPES: ENABLE
334		525
335	BOOT:	526	BOOT:
336	{	527	{
337	if (pipe (respipe))	528	static const struct {
338	croak ("unable to initialize result pipe");	529	const char *name;
		530	IV iv;
		531	} *civ, const_iv[] = {
		532	# define const_iv(name, value) { # name, (IV) value },
		533	# define const_eio(name) { # name, (IV) EIO_ ## name },
		534	const_iv (EXDEV , EXDEV)
		535	const_iv (ENOSYS , ENOSYS)
		536	const_iv (O_RDONLY, O_RDONLY)
		537	const_iv (O_WRONLY, O_WRONLY)
		538	const_iv (O_CREAT , O_CREAT)
		539	const_iv (O_TRUNC , O_TRUNC)
		540	#ifndef _WIN32
		541	const_iv (S_IFIFO , S_IFIFO)
		542	#endif
		543	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		544	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		545	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		546	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		547	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		548	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
339		549
340	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	550	const_eio (MS_ASYNC)
341	croak ("cannot set result pipe to nonblocking mode");	551	const_eio (MS_INVALIDATE)
		552	const_eio (MS_SYNC)
342		553
343	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	554	const_eio (MT_MODIFY)
344	croak ("cannot set result pipe to nonblocking mode");
345	}
346		555
		556	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		557	const_eio (SYNC_FILE_RANGE_WRITE)
		558	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		559
		560	const_eio (READDIR_DENTS)
		561	const_eio (READDIR_DIRS_FIRST)
		562	const_eio (READDIR_STAT_ORDER)
		563	const_eio (READDIR_FOUND_UNKNOWN)
		564
		565	const_eio (DT_UNKNOWN)
		566	const_eio (DT_FIFO)
		567	const_eio (DT_CHR)
		568	const_eio (DT_DIR)
		569	const_eio (DT_BLK)
		570	const_eio (DT_REG)
		571	const_eio (DT_LNK)
		572	const_eio (DT_SOCK)
		573	const_eio (DT_WHT)
		574	};
		575
		576	aio_stash = gv_stashpv ("IO::AIO" , 1);
		577	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		578	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		579
		580	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		581	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		582
		583	create_respipe ();
		584
		585	if (eio_init (want_poll, done_poll) < 0)
		586	croak ("IO::AIO: unable to initialise eio library");
		587
		588	/* atfork child called in fifo order, so before eio's handler */
		589	X_THREAD_ATFORK (0, 0, atfork_child);
		590	}
		591
347	void	592	void
348	min_parallel(nthreads)	593	max_poll_reqs (int nreqs)
349	int nthreads
350	PROTOTYPE: $	594	PROTOTYPE: $
351	CODE:	595	CODE:
352	while (nthreads > started)	596	eio_set_max_poll_reqs (nreqs);
353	start_thread ();
354		597
355	void	598	void
356	max_parallel(nthreads)	599	max_poll_time (double nseconds)
357	int nthreads
358	PROTOTYPE: $	600	PROTOTYPE: $
359	CODE:	601	CODE:
		602	eio_set_max_poll_time (nseconds);
		603
		604	void
		605	min_parallel (int nthreads)
		606	PROTOTYPE: $
		607	CODE:
		608	eio_set_min_parallel (nthreads);
		609
		610	void
		611	max_parallel (int nthreads)
		612	PROTOTYPE: $
		613	CODE:
		614	eio_set_max_parallel (nthreads);
		615
		616	void
		617	max_idle (int nthreads)
		618	PROTOTYPE: $
		619	CODE:
		620	eio_set_max_idle (nthreads);
		621
		622	void
		623	max_outstanding (int maxreqs)
		624	PROTOTYPE: $
		625	CODE:
		626	max_outstanding = maxreqs;
		627
		628	void
		629	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		630	PROTOTYPE: $$$;$
		631	PPCODE:
360	{	632	{
361	int cur = started;	633	dREQ;
362	while (cur > nthreads)	634
363	{	635	req->type = EIO_OPEN;
364	end_thread ();	636	req->sv1 = newSVsv (pathname);
		637	req->ptr1 = SvPVbyte_nolen (req->sv1);
		638	req->int1 = flags;
		639	req->int2 = mode;
		640
		641	REQ_SEND;
		642	}
		643
		644	void
		645	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		646	PROTOTYPE: $;$
		647	ALIAS:
		648	aio_fsync = EIO_FSYNC
		649	aio_fdatasync = EIO_FDATASYNC
		650	PPCODE:
		651	{
		652	int fd = s_fileno_croak (fh, 0);
		653	dREQ;
		654
		655	req->type = ix;
		656	req->sv1 = newSVsv (fh);
		657	req->int1 = fd;
		658
		659	REQ_SEND (req);
		660	}
		661
		662	void
		663	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		664	PROTOTYPE: $$$$;$
		665	PPCODE:
		666	{
		667	int fd = s_fileno_croak (fh, 0);
		668	dREQ;
		669
		670	req->type = EIO_SYNC_FILE_RANGE;
		671	req->sv1 = newSVsv (fh);
		672	req->int1 = fd;
		673	req->offs = offset;
		674	req->size = nbytes;
		675	req->int2 = flags;
		676
		677	REQ_SEND (req);
		678	}
		679
		680	void
		681	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		682	PROTOTYPE: $;$
		683	PPCODE:
		684	{
		685	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		686	int fd = s_fileno_croak (fh, 0);
		687	dREQ;
		688
		689	if (close_pipe < 0)
		690	{
		691	int pipefd [2];
		692
		693	if (pipe (pipefd) < 0
		694	|| close (pipefd [1]) < 0
		695	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		696	abort (); /*D*/
		697
		698	close_pipe = pipefd [0];
		699	}
		700
		701	req->type = EIO_DUP2;
		702	req->int1 = close_pipe;
		703	req->sv2 = newSVsv (fh);
		704	req->int2 = fd;
		705
		706	REQ_SEND (req);
		707	}
		708
		709	void
		710	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		711	ALIAS:
		712	aio_read = EIO_READ
		713	aio_write = EIO_WRITE
		714	PROTOTYPE: $$$$$;$
		715	PPCODE:
		716	{
		717	STRLEN svlen;
		718	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		719	char *svptr = SvPVbyte (data, svlen);
		720	UV len = SvUV (length);
		721
		722	if (dataoffset < 0)
		723	dataoffset += svlen;
		724
		725	if (dataoffset < 0 || dataoffset > svlen)
		726	croak ("dataoffset outside of data scalar");
		727
		728	if (ix == EIO_WRITE)
		729	{
		730	/* write: check length and adjust. */
		731	if (!SvOK (length) || len + dataoffset > svlen)
		732	len = svlen - dataoffset;
		733	}
		734	else
		735	{
		736	/* read: check type and grow scalar as necessary */
		737	SvUPGRADE (data, SVt_PV);
		738	svptr = SvGROW (data, len + dataoffset + 1);
		739	}
		740
		741	{
		742	dREQ;
		743
		744	req->type = ix;
		745	req->sv1 = newSVsv (fh);
		746	req->int1 = fd;
		747	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		748	req->size = len;
		749	req->sv2 = SvREFCNT_inc (data);
		750	req->ptr2 = (char *)svptr + dataoffset;
		751	req->stroffset = dataoffset;
		752
		753	if (!SvREADONLY (data))
365	cur--;	754	{
		755	SvREADONLY_on (data);
		756	req->flags |= FLAG_SV2_RO_OFF;
366	}	757	}
367		758
368	while (started > nthreads)	759	REQ_SEND;
		760	}
		761	}
		762
		763	void
		764	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		765	PROTOTYPE: $$;$
		766	PPCODE:
		767	{
		768	SV *data;
		769	dREQ;
		770
		771	req->type = EIO_READLINK;
		772	req->sv1 = newSVsv (path);
		773	req->ptr1 = SvPVbyte_nolen (req->sv1);
		774
		775	REQ_SEND;
		776	}
		777
		778	void
		779	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		780	PROTOTYPE: $$$$;$
		781	PPCODE:
		782	{
		783	int ifd = s_fileno_croak (in_fh , 0);
		784	int ofd = s_fileno_croak (out_fh, 1);
		785	dREQ;
		786
		787	req->type = EIO_SENDFILE;
		788	req->sv1 = newSVsv (out_fh);
		789	req->int1 = ofd;
		790	req->sv2 = newSVsv (in_fh);
		791	req->int2 = ifd;
		792	req->offs = in_offset;
		793	req->size = length;
		794
		795	REQ_SEND;
		796	}
		797
		798	void
		799	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		800	PROTOTYPE: $$$;$
		801	PPCODE:
		802	{
		803	int fd = s_fileno_croak (fh, 0);
		804	dREQ;
		805
		806	req->type = EIO_READAHEAD;
		807	req->sv1 = newSVsv (fh);
		808	req->int1 = fd;
		809	req->offs = offset;
		810	req->size = length;
		811
		812	REQ_SEND;
		813	}
		814
		815	void
		816	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		817	ALIAS:
		818	aio_stat = EIO_STAT
		819	aio_lstat = EIO_LSTAT
		820	PPCODE:
		821	{
		822	dREQ;
		823
		824	req->sv1 = newSVsv (fh_or_path);
		825
		826	if (SvPOK (req->sv1))
		827	{
		828	req->type = ix;
		829	req->ptr1 = SvPVbyte_nolen (req->sv1);
		830	}
		831	else
		832	{
		833	req->type = EIO_FSTAT;
		834	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		835	}
		836
		837	REQ_SEND;
		838	}
		839
		840	void
		841	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		842	PPCODE:
		843	{
		844	dREQ;
		845
		846	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		847	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		848	req->sv1 = newSVsv (fh_or_path);
		849
		850	if (SvPOK (req->sv1))
		851	{
		852	req->type = EIO_UTIME;
		853	req->ptr1 = SvPVbyte_nolen (req->sv1);
		854	}
		855	else
		856	{
		857	req->type = EIO_FUTIME;
		858	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		859	}
		860
		861	REQ_SEND;
		862	}
		863
		864	void
		865	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		866	PPCODE:
		867	{
		868	dREQ;
		869
		870	req->sv1 = newSVsv (fh_or_path);
		871	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		872
		873	if (SvPOK (req->sv1))
		874	{
		875	req->type = EIO_TRUNCATE;
		876	req->ptr1 = SvPVbyte_nolen (req->sv1);
		877	}
		878	else
		879	{
		880	req->type = EIO_FTRUNCATE;
		881	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		882	}
		883
		884	REQ_SEND;
		885	}
		886
		887	void
		888	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		889	ALIAS:
		890	aio_chmod = EIO_CHMOD
		891	aio_mkdir = EIO_MKDIR
		892	PPCODE:
		893	{
		894	dREQ;
		895
		896	req->int2 = mode;
		897	req->sv1 = newSVsv (fh_or_path);
		898
		899	if (SvPOK (req->sv1))
		900	{
		901	req->type = ix;
		902	req->ptr1 = SvPVbyte_nolen (req->sv1);
		903	}
		904	else
		905	{
		906	req->type = EIO_FCHMOD;
		907	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		908	}
		909
		910	REQ_SEND;
		911	}
		912
		913	void
		914	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		915	PPCODE:
		916	{
		917	dREQ;
		918
		919	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		920	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		921	req->sv1 = newSVsv (fh_or_path);
		922
		923	if (SvPOK (req->sv1))
		924	{
		925	req->type = EIO_CHOWN;
		926	req->ptr1 = SvPVbyte_nolen (req->sv1);
		927	}
		928	else
		929	{
		930	req->type = EIO_FCHOWN;
		931	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		932	}
		933
		934	REQ_SEND;
		935	}
		936
		937	void
		938	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		939	PPCODE:
		940	{
		941	dREQ;
		942
		943	req->type = EIO_READDIR;
		944	req->sv1 = newSVsv (pathname);
		945	req->ptr1 = SvPVbyte_nolen (req->sv1);
		946	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		947
		948	if (flags & EIO_READDIR_DENTS)
		949	req->int1 |= EIO_READDIR_CUSTOM2;
		950
		951	REQ_SEND;
		952	}
		953
		954	void
		955	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		956	ALIAS:
		957	aio_unlink = EIO_UNLINK
		958	aio_rmdir = EIO_RMDIR
		959	aio_readdir = EIO_READDIR
		960	PPCODE:
		961	{
		962	dREQ;
		963
		964	req->type = ix;
		965	req->sv1 = newSVsv (pathname);
		966	req->ptr1 = SvPVbyte_nolen (req->sv1);
		967
		968	REQ_SEND;
		969	}
		970
		971	void
		972	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		973	ALIAS:
		974	aio_link = EIO_LINK
		975	aio_symlink = EIO_SYMLINK
		976	aio_rename = EIO_RENAME
		977	PPCODE:
		978	{
		979	dREQ;
		980
		981	req->type = ix;
		982	req->sv1 = newSVsv (oldpath);
		983	req->ptr1 = SvPVbyte_nolen (req->sv1);
		984	req->sv2 = newSVsv (newpath);
		985	req->ptr2 = SvPVbyte_nolen (req->sv2);
		986
		987	REQ_SEND;
		988	}
		989
		990	void
		991	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		992	PPCODE:
		993	{
		994	dREQ;
		995
		996	req->type = EIO_MKNOD;
		997	req->sv1 = newSVsv (pathname);
		998	req->ptr1 = SvPVbyte_nolen (req->sv1);
		999	req->int2 = (mode_t)mode;
		1000	req->offs = dev;
		1001
		1002	REQ_SEND;
		1003	}
		1004
		1005	void
		1006	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1007	ALIAS:
		1008	aio_mtouch = EIO_MTOUCH
		1009	aio_msync = EIO_MSYNC
		1010	PROTOTYPE: $$$$;$
		1011	PPCODE:
		1012	{
		1013	STRLEN svlen;
		1014	UV len = SvUV (length);
		1015	char *svptr = SvPVbyte (data, svlen);
		1016
		1017	if (offset < 0)
		1018	offset += svlen;
		1019
		1020	if (offset < 0 || offset > svlen)
		1021	croak ("offset outside of scalar");
		1022
		1023	if (!SvOK (length) || len + offset > svlen)
		1024	len = svlen - offset;
		1025
		1026	{
		1027	dREQ;
		1028
		1029	req->type = ix;
		1030	req->size = len;
		1031	req->sv2 = SvREFCNT_inc (data);
		1032	req->ptr2 = (char *)svptr + offset;
		1033	req->int1 = flags;
		1034
		1035	REQ_SEND;
		1036	}
		1037	}
		1038
		1039	void
		1040	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1041	PPCODE:
		1042	{
		1043	dREQ;
		1044
		1045	req->type = EIO_BUSY;
		1046	req->nv1 = delay < 0. ? 0. : delay;
		1047
		1048	REQ_SEND;
		1049	}
		1050
		1051	void
		1052	aio_group (SV *callback=&PL_sv_undef)
		1053	PROTOTYPE: ;$
		1054	PPCODE:
		1055	{
		1056	dREQ;
		1057
		1058	req->type = EIO_GROUP;
		1059
		1060	req_submit (req);
		1061	XPUSHs (req_sv (req, aio_grp_stash));
		1062	}
		1063
		1064	void
		1065	aio_nop (SV *callback=&PL_sv_undef)
		1066	ALIAS:
		1067	aio_nop = EIO_NOP
		1068	aio_sync = EIO_SYNC
		1069	PPCODE:
		1070	{
		1071	dREQ;
		1072
		1073	req->type = ix;
		1074
		1075	REQ_SEND;
		1076	}
		1077
		1078	int
		1079	aioreq_pri (int pri = 0)
		1080	PROTOTYPE: ;$
		1081	CODE:
		1082	RETVAL = next_pri;
		1083	if (items > 0)
		1084	{
		1085	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1086	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1087	next_pri = pri;
		1088	}
		1089	OUTPUT:
		1090	RETVAL
		1091
		1092	void
		1093	aioreq_nice (int nice = 0)
		1094	CODE:
		1095	nice = next_pri - nice;
		1096	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1097	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1098	next_pri = nice;
		1099
		1100	void
		1101	flush ()
		1102	PROTOTYPE:
		1103	CODE:
		1104	while (eio_nreqs ())
369	{	1105	{
370	poll_wait ();	1106	poll_wait ();
371	poll_cb ();	1107	poll_cb ();
372	}	1108	}
373	}
374		1109
375	int	1110	int
376	max_outstanding(nreqs)
377	int nreqs
378	PROTOTYPE: $
379	CODE:
380	RETVAL = max_outstanding;
381	max_outstanding = nreqs;
382
383	void
384	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
385	SV * pathname
386	int flags
387	int mode
388	SV * callback
389	PROTOTYPE: $$$;$
390	CODE:
391	{
392	aio_req req;
393
394	Newz (0, req, 1, aio_cb);
395
396	if (!req)
397	croak ("out of memory during aio_req allocation");
398
399	req->type = REQ_OPEN;
400	req->data = newSVsv (pathname);
401	req->dataptr = SvPV_nolen (req->data);
402	req->fd = flags;
403	req->mode = mode;
404	req->callback = SvREFCNT_inc (callback);
405
406	send_req (req);
407	}
408
409	void
410	aio_close(fh,callback=&PL_sv_undef)
411	SV * fh
412	SV * callback
413	PROTOTYPE: $;$
414	ALIAS:
415	aio_close = REQ_CLOSE
416	aio_fsync = REQ_FSYNC
417	aio_fdatasync = REQ_FDATASYNC
418	CODE:
419	{
420	aio_req req;
421
422	Newz (0, req, 1, aio_cb);
423
424	if (!req)
425	croak ("out of memory during aio_req allocation");
426
427	req->type = ix;
428	req->fh = newSVsv (fh);
429	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
430	req->callback = SvREFCNT_inc (callback);
431
432	send_req (req);
433	}
434
435	void
436	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
437	SV * fh
438	UV offset
439	IV length
440	SV * data
441	IV dataoffset
442	SV * callback
443	ALIAS:
444	aio_read = REQ_READ
445	aio_write = REQ_WRITE
446	PROTOTYPE: $$$$$;$
447	CODE:
448	{
449	aio_req req;
450	STRLEN svlen;
451	char *svptr = SvPV (data, svlen);
452
453	SvUPGRADE (data, SVt_PV);
454	SvPOK_on (data);
455
456	if (dataoffset < 0)
457	dataoffset += svlen;
458
459	if (dataoffset < 0 || dataoffset > svlen)
460	croak ("data offset outside of string");
461
462	if (ix == REQ_WRITE)
463	{
464	/* write: check length and adjust. */
465	if (length < 0 || length + dataoffset > svlen)
466	length = svlen - dataoffset;
467	}
468	else
469	{
470	/* read: grow scalar as necessary */
471	svptr = SvGROW (data, length + dataoffset);
472	}
473
474	if (length < 0)
475	croak ("length must not be negative");
476
477	Newz (0, req, 1, aio_cb);
478
479	if (!req)
480	croak ("out of memory during aio_req allocation");
481
482	req->type = ix;
483	req->fh = newSVsv (fh);
484	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
485	: IoOFP (sv_2io (fh)));
486	req->offset = offset;
487	req->length = length;
488	req->data = SvREFCNT_inc (data);
489	req->dataptr = (char *)svptr + dataoffset;
490	req->callback = SvREFCNT_inc (callback);
491
492	send_req (req);
493	}
494
495	void
496	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
497	SV * fh
498	UV offset
499	IV length
500	SV * callback
501	PROTOTYPE: $$$;$
502	CODE:
503	{
504	aio_req req;
505
506	if (length < 0)
507	croak ("length must not be negative");
508
509	Newz (0, req, 1, aio_cb);
510
511	if (!req)
512	croak ("out of memory during aio_req allocation");
513
514	req->type = REQ_READAHEAD;
515	req->fh = newSVsv (fh);
516	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
517	req->offset = offset;
518	req->length = length;
519	req->callback = SvREFCNT_inc (callback);
520
521	send_req (req);
522	}
523
524	void
525	aio_stat(fh_or_path,callback=&PL_sv_undef)
526	SV * fh_or_path
527	SV * callback
528	ALIAS:
529	aio_stat = REQ_STAT
530	aio_lstat = REQ_LSTAT
531	CODE:
532	{
533	aio_req req;
534
535	Newz (0, req, 1, aio_cb);
536
537	if (!req)
538	croak ("out of memory during aio_req allocation");
539
540	New (0, req->statdata, 1, Stat_t);
541
542	if (!req->statdata)
543	croak ("out of memory during aio_req->statdata allocation");
544
545	if (SvPOK (fh_or_path))
546	{
547	req->type = ix;
548	req->data = newSVsv (fh_or_path);
549	req->dataptr = SvPV_nolen (req->data);
550	}
551	else
552	{
553	req->type = REQ_FSTAT;
554	req->fh = newSVsv (fh_or_path);
555	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
556	}
557
558	req->callback = SvREFCNT_inc (callback);
559
560	send_req (req);
561	}
562
563	void
564	aio_unlink(pathname,callback=&PL_sv_undef)
565	SV * pathname
566	SV * callback
567	CODE:
568	{
569	aio_req req;
570
571	Newz (0, req, 1, aio_cb);
572
573	if (!req)
574	croak ("out of memory during aio_req allocation");
575
576	req->type = REQ_UNLINK;
577	req->data = newSVsv (pathname);
578	req->dataptr = SvPV_nolen (req->data);
579	req->callback = SvREFCNT_inc (callback);
580
581	send_req (req);
582	}
583
584	void
585	flush()
586	PROTOTYPE:
587	CODE:
588	while (nreqs)
589	{
590	poll_wait ();
591	poll_cb ();
592	}
593
594	void
595	poll()	1111	poll()
596	PROTOTYPE:	1112	PROTOTYPE:
597	CODE:	1113	CODE:
598	if (nreqs)
599	{
600	poll_wait ();	1114	poll_wait ();
601	poll_cb ();	1115	RETVAL = poll_cb ();
602	}	1116	OUTPUT:
		1117	RETVAL
603		1118
604	int	1119	int
605	poll_fileno()	1120	poll_fileno()
606	PROTOTYPE:	1121	PROTOTYPE:
607	CODE:	1122	CODE:
608	RETVAL = respipe [0];	1123	RETVAL = s_epipe_fd (&respipe);
609	OUTPUT:	1124	OUTPUT:
610	RETVAL	1125	RETVAL
611		1126
612	int	1127	int
613	poll_cb(...)	1128	poll_cb(...)
…		…
619		1134
620	void	1135	void
621	poll_wait()	1136	poll_wait()
622	PROTOTYPE:	1137	PROTOTYPE:
623	CODE:	1138	CODE:
624	if (nreqs)
625	poll_wait ();	1139	poll_wait ();
626		1140
627	int	1141	int
628	nreqs()	1142	nreqs()
629	PROTOTYPE:	1143	PROTOTYPE:
630	CODE:	1144	CODE:
631	RETVAL = nreqs;	1145	RETVAL = eio_nreqs ();
632	OUTPUT:	1146	OUTPUT:
633	RETVAL	1147	RETVAL
634		1148
		1149	int
		1150	nready()
		1151	PROTOTYPE:
		1152	CODE:
		1153	RETVAL = eio_nready ();
		1154	OUTPUT:
		1155	RETVAL
		1156
		1157	int
		1158	npending()
		1159	PROTOTYPE:
		1160	CODE:
		1161	RETVAL = eio_npending ();
		1162	OUTPUT:
		1163	RETVAL
		1164
		1165	int
		1166	nthreads()
		1167	PROTOTYPE:
		1168	CODE:
		1169	RETVAL = eio_nthreads ();
		1170	OUTPUT:
		1171	RETVAL
		1172
		1173	int
		1174	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1175	PROTOTYPE: $$$$
		1176	CODE:
		1177	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1178	RETVAL = posix_fadvise (fh, offset, length, advice);
		1179	#else
		1180	RETVAL = errno = ENOSYS;
		1181	#endif
		1182	OUTPUT:
		1183	RETVAL
		1184
		1185	ssize_t
		1186	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1187	PROTOTYPE: $$$$
		1188	CODE:
		1189	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1190	OUTPUT:
		1191	RETVAL
		1192
		1193	void _on_next_submit (SV *cb)
		1194	CODE:
		1195	SvREFCNT_dec (on_next_submit);
		1196	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1197
		1198	PROTOTYPES: DISABLE
		1199
		1200	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1201
		1202	void
		1203	cancel (aio_req_ornot req)
		1204	CODE:
		1205	eio_cancel (req);
		1206
		1207	void
		1208	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1209	PPCODE:
		1210	{
		1211	if (GIMME_V != G_VOID)
		1212	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1213
		1214	if (items > 1)
		1215	{
		1216	SV *cb_cv =get_cb (callback);
		1217
		1218	SvREFCNT_dec (req->callback);
		1219	req->callback = SvREFCNT_inc (cb_cv);
		1220	}
		1221	}
		1222
		1223	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1224
		1225	void
		1226	add (aio_req grp, ...)
		1227	PPCODE:
		1228	{
		1229	int i;
		1230
		1231	if (grp->int1 == 2)
		1232	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1233
		1234	for (i = 1; i < items; ++i )
		1235	{
		1236	aio_req req;
		1237
		1238	if (GIMME_V != G_VOID)
		1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1240
		1241	req = SvAIO_REQ (ST (i));
		1242
		1243	if (req)
		1244	eio_grp_add (grp, req);
		1245	}
		1246	}
		1247
		1248	void
		1249	cancel_subs (aio_req_ornot req)
		1250	CODE:
		1251	req_cancel_subs (req);
		1252
		1253	void
		1254	result (aio_req grp, ...)
		1255	CODE:
		1256	{
		1257	int i;
		1258	AV *av;
		1259
		1260	grp->errorno = errno;
		1261
		1262	av = newAV ();
		1263	av_extend (av, items - 1);
		1264
		1265	for (i = 1; i < items; ++i )
		1266	av_push (av, newSVsv (ST (i)));
		1267
		1268	SvREFCNT_dec (grp->sv1);
		1269	grp->sv1 = (SV *)av;
		1270	}
		1271
		1272	void
		1273	errno (aio_req grp, int errorno = errno)
		1274	CODE:
		1275	grp->errorno = errorno;
		1276
		1277	void
		1278	limit (aio_req grp, int limit)
		1279	CODE:
		1280	eio_grp_limit (grp, limit);
		1281
		1282	void
		1283	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1284	CODE:
		1285	{
		1286	SvREFCNT_dec (grp->sv2);
		1287	grp->sv2 = newSVsv (callback);
		1288	grp->feed = aio_grp_feed;
		1289
		1290	if (grp->int2 <= 0)
		1291	grp->int2 = 2;
		1292
		1293	eio_grp_limit (grp, grp->int2);
		1294	}
		1295

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