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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.24 by root, Wed Aug 17 03:01:56 2005 UTC vs.
Revision 1.122 by root, Tue May 13 19:35:16 2008 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include <stddef.h>
9		10	#include <stdlib.h>
		11	#include <errno.h>
10	#include <sys/types.h>	12	#include <sys/types.h>
11	#include <sys/stat.h>	13	#include <sys/stat.h>
12
13	#include <unistd.h>	14	#include <limits.h>
14	#include <fcntl.h>	15	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	16	#include <sched.h>
17		17
18	#include <pthread.h>	18	/* perl namespace pollution */
		19	#undef VERSION
19		20
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	#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		22
24	#if __ia64	23	# define EIO_STRUCT_DIRENT Direntry_t
25	# define STACKSIZE 65536	24	# undef malloc
		25	# undef free
		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 4096	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	#define EIO_STRUCT_STAT Stat_t
		71
		72	/* use NV for 32 bit perls as it allows larger offsets */
		73	#if IVSIZE >= 8
		74	# define SvVAL64 SvIV
		75	#else
		76	# define SvVAL64 SvNV
		77	#endif
		78
		79	static HV *stash;
		80	typedef SV SV8; /* byte-sv, used for argument-checking */
		81
		82	#define AIO_REQ_KLASS "IO::AIO::REQ"
		83	#define AIO_GRP_KLASS "IO::AIO::GRP"
		84
		85	#define EIO_REQ_MEMBERS \
		86	SV *callback; \
		87	SV *sv1, *sv2; \
		88	STRLEN stroffset; \
		89	SV *self;
		90
		91	#define EIO_NO_WRAPPERS 1
		92
		93	#include "libeio/eio.h"
		94
		95	static int req_invoke (eio_req *req);
		96	#define EIO_FINISH(req) req_invoke (req)
		97	static void aio_grp_feed (eio_req *grp);
		98	#define EIO_FEED(req) aio_grp_feed (req)
		99	static void req_destroy (eio_req *grp);
		100	#define EIO_DESTROY(req) req_destroy (req)
		101
30	enum {	102	enum {
31	REQ_QUIT,	103	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,
35	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,
37	REQ_SYMLINK,
38	};	104	};
39		105
40	typedef struct aio_cb {	106	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		107
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	108	typedef eio_req *aio_req;
		109	typedef eio_req *aio_req_ornot;
59		110
60	static int started;	111	static SV *on_next_submit;
61	static volatile int nreqs;	112	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	113	static int max_outstanding;
63	static int respipe [2];
64		114
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	115	static int respipe_osf [2], respipe [2] = { -1, -1 };
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		116
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	117	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */	118	static void req_cancel (aio_req req);
72		119
73	static void	120	static void want_poll (void)
74	poll_wait ()
75	{	121	{
76	if (nreqs && !ress)	122	/* write a dummy byte to the pipe so fh becomes ready */
		123	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		124	}
		125
		126	static void done_poll (void)
		127	{
		128	/* read any signals sent by the worker threads */
		129	char buf [4];
		130	while (respipe_read (respipe [0], buf, 4) == 4)
		131	;
		132	}
		133
		134	/* must be called at most once */
		135	static SV *req_sv (aio_req req, const char *klass)
		136	{
		137	if (!req->self)
77	{	138	{
78	fd_set rfd;	139	req->self = (SV *)newHV ();
79	FD_ZERO(&rfd);	140	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80	FD_SET(respipe [0], &rfd);
81
82	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	141	}
84	}
85		142
86	static int	143	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
87	poll_cb ()	144	}
		145
		146	static aio_req SvAIO_REQ (SV *sv)
		147	{
		148	MAGIC *mg;
		149
		150	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		151	croak ("object of class " AIO_REQ_KLASS " expected");
		152
		153	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		154
		155	return mg ? (aio_req)mg->mg_ptr : 0;
		156	}
		157
		158	static void aio_grp_feed (aio_req grp)
		159	{
		160	if (grp->sv2 && SvOK (grp->sv2))
		161	{
		162	dSP;
		163
		164	ENTER;
		165	SAVETMPS;
		166	PUSHMARK (SP);
		167	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		168	PUTBACK;
		169	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		170	SPAGAIN;
		171	FREETMPS;
		172	LEAVE;
		173	}
		174	}
		175
		176	static void req_submit (eio_req *req)
		177	{
		178	eio_submit (req);
		179
		180	if (on_next_submit)
		181	{
		182	dSP;
		183	SV *cb = sv_2mortal (on_next_submit);
		184
		185	on_next_submit = 0;
		186
		187	PUSHMARK (SP);
		188	PUTBACK;
		189	call_sv (cb, G_DISCARD | G_EVAL);
		190	}
		191	}
		192
		193	static int req_invoke (eio_req *req)
88	{	194	{
89	dSP;	195	dSP;
90	int count = 0;
91	int do_croak = 0;
92	aio_req req, prv;
93		196
94	pthread_mutex_lock (&reslock);	197	if (req->flags & FLAG_SV2_RO_OFF)
		198	SvREADONLY_off (req->sv2);
95		199
96	{	200	if (!EIO_CANCELLED (req) && SvOK (req->callback))
97	/* read any signals sent by the worker threads */
98	char buf [32];
99	while (read (respipe [0], buf, 32) == 32)
100	;
101	}
102
103	req = ress;
104	ress = rese = 0;
105
106	pthread_mutex_unlock (&reslock);
107
108	while (req)
109	{	201	{
110	nreqs--;	202	ENTER;
		203	SAVETMPS;
		204	PUSHMARK (SP);
		205	EXTEND (SP, 1);
111		206
112	if (req->type == REQ_QUIT)	207	switch (req->type)
113	started--;
114	else
115	{	208	{
116	int errorno = errno;	209	case EIO_READDIR:
117	errno = req->errorno;
118
119	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset
121	+ req->result > 0 ? req->result : 0);
122
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->fh)
127	SvREFCNT_dec (req->fh);
128
129	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
130	{	210	{
131	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	211	SV *rv = &PL_sv_undef;
132	PL_laststatval = req->result;
133	PL_statcache = *(req->statdata);
134		212
135	Safefree (req->statdata);	213	if (req->result >= 0)
		214	{
		215	int i;
		216	char *buf = req->ptr2;
		217	AV *av = newAV ();
		218
		219	av_extend (av, req->result - 1);
		220
		221	for (i = 0; i < req->result; ++i)
		222	{
		223	SV *sv = newSVpv (buf, 0);
		224
		225	av_store (av, i, sv);
		226	buf += SvCUR (sv) + 1;
		227	}
		228
		229	rv = sv_2mortal (newRV_noinc ((SV *)av));
		230	}
		231
		232	PUSHs (rv);
136	}	233	}
		234	break;
137		235
138	ENTER;	236	case EIO_OPEN:
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141
142	if (req->type == REQ_OPEN)
143	{	237	{
144	/* convert fd to fh */	238	/* convert fd to fh */
145	SV *fh;	239	SV *fh = &PL_sv_undef;
146		240
147	PUTBACK;	241	if (req->result >= 0)
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	242	{
149	SPAGAIN;	243	GV *gv = (GV *)sv_newmortal ();
		244	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		245	char sym [64];
		246	int symlen;
		247
		248	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		249	gv_init (gv, stash, sym, symlen, 0);
150		250
151	fh = SvREFCNT_inc (POPs);	251	symlen = snprintf (
		252	sym,
		253	sizeof (sym),
		254	"%s&=%d",
		255	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		256	req->result
		257	);
152		258
		259	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		260	fh = (SV *)gv;
		261	}
		262
153	PUSHMARK (SP);	263	PUSHs (fh);
154	XPUSHs (sv_2mortal (fh));
155	}	264	}
		265	break;
156		266
157	if (SvOK (req->callback))	267	case EIO_GROUP:
		268	req->int1 = 2; /* mark group as finished */
		269
		270	if (req->sv1)
158	{	271	{
159	PUTBACK;	272	int i;
160	call_sv (req->callback, G_VOID | G_EVAL);	273	AV *av = (AV *)req->sv1;
161	SPAGAIN;	274
		275	EXTEND (SP, AvFILL (av) + 1);
		276	for (i = 0; i <= AvFILL (av); ++i)
		277	PUSHs (*av_fetch (av, i, 0));
162	}	278	}
		279	break;
163		280
164	do_croak = SvTRUE (ERRSV);	281	case EIO_NOP:
		282	case EIO_BUSY:
		283	break;
165		284
166	LEAVE;	285	case EIO_READLINK:
167		286	if (req->result > 0)
168	if (req->callback)	287	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
169	SvREFCNT_dec (req->callback);	288	break;
170		289
171	errno = errorno;	290	case EIO_STAT:
172	count++;	291	case EIO_LSTAT:
		292	case EIO_FSTAT:
		293	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		294	PL_laststatval = req->result;
		295	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		296	PUSHs (sv_2mortal (newSViv (req->result)));
		297	break;
		298
		299	case EIO_READ:
		300	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		301	*SvEND (req->sv2) = 0;
		302	PUSHs (sv_2mortal (newSViv (req->result)));
		303	break;
		304
		305	case EIO_DUP2:
		306	if (req->result > 0)
		307	req->result = 0;
		308	/* FALLTHROUGH */
		309
		310	default:
		311	PUSHs (sv_2mortal (newSViv (req->result)));
		312	break;
173	}	313	}
174		314
175	prv = req;	315	errno = req->errorno;
176	req = req->next;	316
		317	PUTBACK;
		318	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		319	SPAGAIN;
		320
		321	FREETMPS;
		322	LEAVE;
		323
		324	PUTBACK;
		325	}
		326
		327	return !!SvTRUE (ERRSV);
		328	}
		329
		330	static void req_destroy (aio_req req)
		331	{
		332	if (req->self)
		333	{
		334	sv_unmagic (req->self, PERL_MAGIC_ext);
		335	SvREFCNT_dec (req->self);
		336	}
		337
		338	SvREFCNT_dec (req->sv1);
		339	SvREFCNT_dec (req->sv2);
		340	SvREFCNT_dec (req->callback);
		341
177	Safefree (prv);	342	Safefree (req);
		343	}
178		344
179	if (do_croak)	345	static void req_cancel_subs (aio_req grp)
		346	{
		347	aio_req sub;
		348
		349	if (grp->type != EIO_GROUP)
		350	return;
		351
		352	SvREFCNT_dec (grp->sv2);
		353	grp->sv2 = 0;
		354
		355	eio_grp_cancel (grp);
		356	}
		357
		358	#ifdef USE_SOCKETS_AS_HANDLES
		359	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		360	#else
		361	# define TO_SOCKET(x) (x)
		362	#endif
		363
		364	static void
		365	create_respipe (void)
		366	{
		367	int old_readfd = respipe [0];
		368
		369	if (respipe [1] >= 0)
		370	respipe_close (TO_SOCKET (respipe [1]));
		371
		372	#ifdef _WIN32
		373	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		374	#else
		375	if (pipe (respipe))
		376	#endif
		377	croak ("unable to initialize result pipe");
		378
		379	if (old_readfd >= 0)
		380	{
		381	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		382	croak ("unable to initialize result pipe(2)");
		383
		384	respipe_close (respipe [0]);
		385	respipe [0] = old_readfd;
		386	}
		387
		388	#ifdef _WIN32
		389	int arg = 1;
		390	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		391	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		392	#else
		393	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		394	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		395	#endif
		396	croak ("unable to initialize result pipe(3)");
		397
		398	respipe_osf [0] = TO_SOCKET (respipe [0]);
		399	respipe_osf [1] = TO_SOCKET (respipe [1]);
		400	}
		401
		402	static void poll_wait (void)
		403	{
		404	fd_set rfd;
		405
		406	while (eio_nreqs ())
		407	{
		408	int size;
		409
		410	X_LOCK (reslock);
		411	size = res_queue.size;
		412	X_UNLOCK (reslock);
		413
		414	if (size)
		415	return;
		416
		417	maybe_start_thread ();
		418
		419	FD_ZERO (&rfd);
		420	FD_SET (respipe [0], &rfd);
		421
		422	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		423	}
		424	}
		425
		426	static int poll_cb (void)
		427	{
		428	int res;
		429
		430	do
		431	{
		432	res = eio_poll ();
		433
		434	if (res > 0)
180	croak (0);	435	croak (0);
181	}	436	}
		437	while (max_outstanding && max_outstanding <= eio_nreqs ());
182		438
183	return count;	439	return res;
184	}
185
186	static void *aio_proc(void *arg);
187
188	static void
189	start_thread (void)
190	{
191	sigset_t fullsigset, oldsigset;
192	pthread_t tid;
193	pthread_attr_t attr;
194
195	pthread_attr_init (&attr);
196	pthread_attr_setstacksize (&attr, STACKSIZE);
197	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
198
199	sigfillset (&fullsigset);
200	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
201
202	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
203	started++;
204
205	sigprocmask (SIG_SETMASK, &oldsigset, 0);
206	}
207
208	static void
209	send_req (aio_req req)
210	{
211	nreqs++;
212
213	pthread_mutex_lock (&reqlock);
214
215	req->next = 0;
216
217	if (reqe)
218	{
219	reqe->next = req;
220	reqe = req;
221	}
222	else
223	reqe = reqs = req;
224
225	pthread_cond_signal (&reqwait);
226	pthread_mutex_unlock (&reqlock);
227
228	while (nreqs > max_outstanding)
229	{
230	poll_wait ();
231	poll_cb ();
232	}
233	}
234
235	static void
236	end_thread (void)
237	{
238	aio_req req;
239	New (0, req, 1, aio_cb);
240	req->type = REQ_QUIT;
241
242	send_req (req);
243	}
244
245
246	static void min_parallel (int nthreads)
247	{
248	while (nthreads > started)
249	start_thread ();
250	}
251
252	static void max_parallel (int nthreads)
253	{
254	int cur = started;
255	while (cur > nthreads)
256	{
257	end_thread ();
258	cur--;
259	}
260
261	while (started > nthreads)
262	{
263	poll_wait ();
264	poll_cb ();
265	}
266	}
267
268	static int fork_started;
269
270	static void atfork_prepare (void)
271	{
272	pthread_mutex_lock (&frklock);
273
274	fork_started = started;
275
276	for (;;) {
277	while (nreqs)
278	{
279	poll_wait ();
280	poll_cb ();
281	}
282
283	max_parallel (0);
284
285	pthread_mutex_lock (&reqlock);
286
287	if (!nreqs && !started)
288	break;
289
290	pthread_mutex_unlock (&reqlock);
291
292	min_parallel (fork_started);
293	}
294
295	pthread_mutex_lock (&reslock);
296
297	assert (!started);
298	assert (!nreqs);
299	assert (!reqs && !reqe);
300	assert (!ress && !rese);
301	}
302
303	static void atfork_parent (void)
304	{
305	pthread_mutex_unlock (&reslock);
306	min_parallel (fork_started);
307	pthread_mutex_unlock (&reqlock);
308	pthread_mutex_unlock (&frklock);
309	}	440	}
310		441
311	static void atfork_child (void)	442	static void atfork_child (void)
312	{	443	{
313	reqs = reqe = 0;	444	create_respipe ();
314
315	atfork_parent ();
316	}
317
318	/*****************************************************************************/
319	/* work around various missing functions */
320
321	#if !HAVE_PREADWRITE
322	# define pread aio_pread
323	# define pwrite aio_pwrite
324
325	/*
326	* make our pread/pwrite safe against themselves, but not against
327	* normal read/write by using a mutex. slows down execution a lot,
328	* but that's your problem, not mine.
329	*/
330	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
331
332	static ssize_t
333	pread (int fd, void *buf, size_t count, off_t offset)
334	{
335	ssize_t res;
336	off_t ooffset;
337
338	pthread_mutex_lock (&iolock);
339	ooffset = lseek (fd, 0, SEEK_CUR);
340	lseek (fd, offset, SEEK_SET);
341	res = read (fd, buf, count);
342	lseek (fd, ooffset, SEEK_SET);
343	pthread_mutex_unlock (&iolock);
344
345	return res;
346	}
347
348	static ssize_t
349	pwrite (int fd, void *buf, size_t count, off_t offset)
350	{
351	ssize_t res;
352	off_t ooffset;
353
354	pthread_mutex_lock (&iolock);
355	ooffset = lseek (fd, 0, SEEK_CUR);
356	lseek (fd, offset, SEEK_SET);
357	res = write (fd, buf, count);
358	lseek (fd, offset, SEEK_SET);
359	pthread_mutex_unlock (&iolock);
360
361	return res;
362	}
363	#endif
364
365	#if !HAVE_FDATASYNC
366	# define fdatasync fsync
367	#endif
368
369	#if !HAVE_READAHEAD
370	# define readahead aio_readahead
371
372	static char readahead_buf[4096];
373
374	static ssize_t
375	readahead (int fd, off_t offset, size_t count)
376	{
377	while (count > 0)
378	{
379	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
380
381	pread (fd, readahead_buf, len, offset);
382	offset += len;
383	count -= len;
384	}
385
386	errno = 0;
387	}
388	#endif
389
390	/*****************************************************************************/
391
392	static void *
393	aio_proc (void *thr_arg)
394	{
395	aio_req req;
396	int type;
397
398	do
399	{
400	pthread_mutex_lock (&reqlock);
401
402	for (;;)
403	{
404	req = reqs;
405
406	if (reqs)
407	{
408	reqs = reqs->next;
409	if (!reqs) reqe = 0;
410	}
411
412	if (req)
413	break;
414
415	pthread_cond_wait (&reqwait, &reqlock);
416	}
417
418	pthread_mutex_unlock (&reqlock);
419
420	errno = 0; /* strictly unnecessary */
421
422	type = req->type;
423
424	switch (type)
425	{
426	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
427	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
428
429	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
430
431	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
432	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
433	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
434
435	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
436	case REQ_CLOSE: req->result = close (req->fd); break;
437	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
438	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
439	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
440
441	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
442	case REQ_FSYNC: req->result = fsync (req->fd); break;
443
444	case REQ_QUIT:
445	break;
446
447	default:
448	req->result = ENOSYS;
449	break;
450	}
451
452	req->errorno = errno;
453
454	pthread_mutex_lock (&reslock);
455
456	req->next = 0;
457
458	if (rese)
459	{
460	rese->next = req;
461	rese = req;
462	}
463	else
464	{
465	rese = ress = req;
466
467	/* write a dummy byte to the pipe so fh becomes ready */
468	write (respipe [1], &respipe, 1);
469	}
470
471	pthread_mutex_unlock (&reslock);
472	}
473	while (type != REQ_QUIT);
474
475	return 0;
476	}	445	}
477		446
478	#define dREQ \	447	#define dREQ \
479	aio_req req; \	448	aio_req req; \
		449	int req_pri = next_pri; \
		450	next_pri = EIO_PRI_DEFAULT; \
480	\	451	\
481	if (SvOK (callback) && !SvROK (callback)) \	452	if (SvOK (callback) && !SvROK (callback)) \
482	croak ("clalback must be undef or of reference type"); \	453	croak ("callback must be undef or of reference type"); \
483	\	454	\
484	Newz (0, req, 1, aio_cb); \	455	Newz (0, req, 1, eio_req); \
485	if (!req) \	456	if (!req) \
486	croak ("out of memory during aio_req allocation"); \	457	croak ("out of memory during eio_req allocation"); \
487	\	458	\
488	req->callback = SvREFCNT_inc (callback);	459	req->callback = newSVsv (callback); \
		460	req->pri = req_pri
		461
		462	#define REQ_SEND \
		463	req_submit (req); \
		464	\
		465	if (GIMME_V != G_VOID) \
		466	XPUSHs (req_sv (req, AIO_REQ_KLASS));
489		467
490	MODULE = IO::AIO PACKAGE = IO::AIO	468	MODULE = IO::AIO PACKAGE = IO::AIO
491		469
492	PROTOTYPES: ENABLE	470	PROTOTYPES: ENABLE
493		471
494	BOOT:	472	BOOT:
495	{	473	{
496	if (pipe (respipe))	474	stash = gv_stashpv ("IO::AIO", 1);
497	croak ("unable to initialize result pipe");
498		475
499	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	476	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
500	croak ("cannot set result pipe to nonblocking mode");	477	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		478	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		479	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		480	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		481	#ifndef _WIN32
		482	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		483	#endif
501		484
502	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	485	create_respipe ();
503	croak ("cannot set result pipe to nonblocking mode");
504		486
505	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	487	if (eio_init (want_poll, done_poll) < 0)
506	}	488	croak ("IO::AIO: unable to initialise eio library");
507		489
		490	/* atfork child called in fifo order, so before eio's handler */
		491	X_THREAD_ATFORK (0, 0, atfork_child);
		492	}
		493
508	void	494	void
509	min_parallel(nthreads)	495	max_poll_reqs (int nreqs)
510	int nthreads
511	PROTOTYPE: $	496	PROTOTYPE: $
		497	CODE:
		498	eio_set_max_poll_reqs (nreqs);
512		499
513	void	500	void
514	max_parallel(nthreads)	501	max_poll_time (double nseconds)
515	int nthreads
516	PROTOTYPE: $	502	PROTOTYPE: $
517
518	int
519	max_outstanding(nreqs)
520	int nreqs
521	PROTOTYPE: $
522	CODE:	503	CODE:
523	RETVAL = max_outstanding;	504	eio_set_max_poll_time (nseconds);
		505
		506	void
		507	min_parallel (int nthreads)
		508	PROTOTYPE: $
		509	CODE:
		510	eio_set_min_parallel (nthreads);
		511
		512	void
		513	max_parallel (int nthreads)
		514	PROTOTYPE: $
		515	CODE:
		516	eio_set_max_parallel (nthreads);
		517
		518	void
		519	max_idle (int nthreads)
		520	PROTOTYPE: $
		521	CODE:
		522	eio_set_max_idle (nthreads);
		523
		524	void
		525	max_outstanding (int maxreqs)
		526	PROTOTYPE: $
		527	CODE:
524	max_outstanding = nreqs;	528	max_outstanding = maxreqs;
525		529
526	void	530	void
527	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	531	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
528	SV * pathname
529	int flags
530	int mode
531	SV * callback
532	PROTOTYPE: $$$;$	532	PROTOTYPE: $$$;$
533	CODE:	533	PPCODE:
534	{	534	{
535	dREQ;	535	dREQ;
536		536
537	req->type = REQ_OPEN;	537	req->type = EIO_OPEN;
538	req->data = newSVsv (pathname);	538	req->sv1 = newSVsv (pathname);
539	req->dataptr = SvPVbyte_nolen (req->data);	539	req->ptr1 = SvPVbyte_nolen (req->sv1);
540	req->fd = flags;	540	req->int1 = flags;
541	req->mode = mode;	541	req->int2 = mode;
542		542
543	send_req (req);	543	REQ_SEND;
544	}	544	}
545		545
546	void	546	void
547	aio_close(fh,callback=&PL_sv_undef)	547	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
548	SV * fh
549	SV * callback
550	PROTOTYPE: $;$	548	PROTOTYPE: $;$
551	ALIAS:	549	ALIAS:
552	aio_close = REQ_CLOSE
553	aio_fsync = REQ_FSYNC	550	aio_fsync = EIO_FSYNC
554	aio_fdatasync = REQ_FDATASYNC	551	aio_fdatasync = EIO_FDATASYNC
555	CODE:	552	PPCODE:
556	{	553	{
557	dREQ;	554	dREQ;
558		555
559	req->type = ix;	556	req->type = ix;
560	req->fh = newSVsv (fh);	557	req->sv1 = newSVsv (fh);
561	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	558	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
562		559
563	send_req (req);	560	REQ_SEND (req);
564	}	561	}
565		562
566	void	563	void
		564	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		565	PROTOTYPE: $;$
		566	PPCODE:
		567	{
		568	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		569	dREQ;
		570
		571	if (close_pipe < 0)
		572	{
		573	int pipefd [2];
		574
		575	if (pipe (pipefd) < 0
		576	|| close (pipefd [1]) < 0
		577	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		578	abort (); /*D*/
		579
		580	close_pipe = pipefd [0];
		581	}
		582
		583	req->type = EIO_DUP2;
		584	req->int1 = close_pipe;
		585	req->sv2 = newSVsv (fh);
		586	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		587
		588	REQ_SEND (req);
		589	}
		590
		591	void
567	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	592	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
568	SV * fh
569	UV offset
570	IV length
571	SV * data
572	IV dataoffset
573	SV * callback
574	ALIAS:	593	ALIAS:
575	aio_read = REQ_READ	594	aio_read = EIO_READ
576	aio_write = REQ_WRITE	595	aio_write = EIO_WRITE
577	PROTOTYPE: $$$$$;$	596	PROTOTYPE: $$$$$;$
578	CODE:	597	PPCODE:
579	{	598	{
580	aio_req req;
581	STRLEN svlen;	599	STRLEN svlen;
582	char *svptr = SvPVbyte (data, svlen);	600	char *svptr = SvPVbyte (data, svlen);
		601	UV len = SvUV (length);
583		602
584	SvUPGRADE (data, SVt_PV);	603	SvUPGRADE (data, SVt_PV);
585	SvPOK_on (data);	604	SvPOK_on (data);
586		605
587	if (dataoffset < 0)	606	if (dataoffset < 0)
588	dataoffset += svlen;	607	dataoffset += svlen;
589		608
590	if (dataoffset < 0 || dataoffset > svlen)	609	if (dataoffset < 0 || dataoffset > svlen)
591	croak ("data offset outside of string");	610	croak ("dataoffset outside of data scalar");
592		611
593	if (ix == REQ_WRITE)	612	if (ix == EIO_WRITE)
594	{	613	{
595	/* write: check length and adjust. */	614	/* write: check length and adjust. */
596	if (length < 0 || length + dataoffset > svlen)	615	if (!SvOK (length) || len + dataoffset > svlen)
597	length = svlen - dataoffset;	616	len = svlen - dataoffset;
598	}	617	}
599	else	618	else
600	{	619	{
601	/* read: grow scalar as necessary */	620	/* read: grow scalar as necessary */
602	svptr = SvGROW (data, length + dataoffset);	621	svptr = SvGROW (data, len + dataoffset + 1);
603	}	622	}
604		623
605	if (length < 0)	624	if (len < 0)
606	croak ("length must not be negative");	625	croak ("length must not be negative");
607		626
608	{	627	{
609	dREQ;	628	dREQ;
610		629
611	req->type = ix;	630	req->type = ix;
612	req->fh = newSVsv (fh);	631	req->sv1 = newSVsv (fh);
613	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	632	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
614	: IoOFP (sv_2io (fh)));	633	: IoOFP (sv_2io (fh)));
		634	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
615	req->offset = offset;	635	req->size = len;
616	req->length = length;
617	req->data = SvREFCNT_inc (data);	636	req->sv2 = SvREFCNT_inc (data);
618	req->dataptr = (char *)svptr + dataoffset;	637	req->ptr2 = (char *)svptr + dataoffset;
619	req->callback = SvREFCNT_inc (callback);	638	req->stroffset = dataoffset;
620		639
621	send_req (req);	640	if (!SvREADONLY (data))
		641	{
		642	SvREADONLY_on (data);
		643	req->flags |= FLAG_SV2_RO_OFF;
		644	}
		645
		646	REQ_SEND;
622	}	647	}
623	}	648	}
624		649
625	void	650	void
		651	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		652	PROTOTYPE: $$;$
		653	PPCODE:
		654	{
		655	SV *data;
		656	dREQ;
		657
		658	req->type = EIO_READLINK;
		659	req->sv1 = newSVsv (path);
		660	req->ptr1 = SvPVbyte_nolen (req->sv1);
		661
		662	REQ_SEND;
		663	}
		664
		665	void
		666	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		667	PROTOTYPE: $$$$;$
		668	PPCODE:
		669	{
		670	dREQ;
		671
		672	req->type = EIO_SENDFILE;
		673	req->sv1 = newSVsv (out_fh);
		674	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		675	req->sv2 = newSVsv (in_fh);
		676	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		677	req->offs = SvVAL64 (in_offset);
		678	req->size = length;
		679
		680	REQ_SEND;
		681	}
		682
		683	void
626	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	684	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
627	SV * fh
628	UV offset
629	IV length
630	SV * callback
631	PROTOTYPE: $$$;$	685	PROTOTYPE: $$$;$
632	CODE:	686	PPCODE:
633	{	687	{
634	dREQ;	688	dREQ;
635		689
636	req->type = REQ_READAHEAD;	690	req->type = EIO_READAHEAD;
637	req->fh = newSVsv (fh);	691	req->sv1 = newSVsv (fh);
638	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	692	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
639	req->offset = offset;	693	req->offs = SvVAL64 (offset);
640	req->length = length;	694	req->size = length;
641		695
642	send_req (req);	696	REQ_SEND;
643	}	697	}
644		698
645	void	699	void
646	aio_stat(fh_or_path,callback=&PL_sv_undef)	700	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
647	SV * fh_or_path
648	SV * callback
649	ALIAS:	701	ALIAS:
650	aio_stat = REQ_STAT	702	aio_stat = EIO_STAT
651	aio_lstat = REQ_LSTAT	703	aio_lstat = EIO_LSTAT
652	CODE:	704	PPCODE:
653	{	705	{
654	dREQ;	706	dREQ;
655		707
656	New (0, req->statdata, 1, Stat_t);	708	req->sv1 = newSVsv (fh_or_path);
657	if (!req->statdata)
658	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
659		709
660	if (SvPOK (fh_or_path))	710	if (SvPOK (req->sv1))
661	{	711	{
662	req->type = ix;	712	req->type = ix;
663	req->data = newSVsv (fh_or_path);
664	req->dataptr = SvPVbyte_nolen (req->data);	713	req->ptr1 = SvPVbyte_nolen (req->sv1);
665	}	714	}
666	else	715	else
667	{	716	{
668	req->type = REQ_FSTAT;	717	req->type = EIO_FSTAT;
669	req->fh = newSVsv (fh_or_path);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	718	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		719	}
		720
		721	REQ_SEND;
		722	}
		723
		724	void
		725	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		726	PPCODE:
		727	{
		728	dREQ;
		729
		730	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		731	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		732	req->sv1 = newSVsv (fh_or_path);
		733
		734	if (SvPOK (req->sv1))
671	}	735	{
		736	req->type = EIO_UTIME;
		737	req->ptr1 = SvPVbyte_nolen (req->sv1);
		738	}
		739	else
		740	{
		741	req->type = EIO_FUTIME;
		742	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		743	}
672		744
673	send_req (req);	745	REQ_SEND;
674	}	746	}
675		747
676	void	748	void
		749	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		750	PPCODE:
		751	{
		752	dREQ;
		753
		754	req->sv1 = newSVsv (fh_or_path);
		755	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		756
		757	if (SvPOK (req->sv1))
		758	{
		759	req->type = EIO_TRUNCATE;
		760	req->ptr1 = SvPVbyte_nolen (req->sv1);
		761	}
		762	else
		763	{
		764	req->type = EIO_FTRUNCATE;
		765	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		766	}
		767
		768	REQ_SEND;
		769	}
		770
		771	void
		772	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		773	ALIAS:
		774	aio_chmod = EIO_CHMOD
		775	aio_mkdir = EIO_MKDIR
		776	PPCODE:
		777	{
		778	dREQ;
		779
		780	req->int2 = mode;
		781	req->sv1 = newSVsv (fh_or_path);
		782
		783	if (SvPOK (req->sv1))
		784	{
		785	req->type = ix;
		786	req->ptr1 = SvPVbyte_nolen (req->sv1);
		787	}
		788	else
		789	{
		790	req->type = EIO_FCHMOD;
		791	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		792	}
		793
		794	REQ_SEND;
		795	}
		796
		797	void
		798	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		799	PPCODE:
		800	{
		801	dREQ;
		802
		803	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		804	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		805	req->sv1 = newSVsv (fh_or_path);
		806
		807	if (SvPOK (req->sv1))
		808	{
		809	req->type = EIO_CHOWN;
		810	req->ptr1 = SvPVbyte_nolen (req->sv1);
		811	}
		812	else
		813	{
		814	req->type = EIO_FCHOWN;
		815	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		816	}
		817
		818	REQ_SEND;
		819	}
		820
		821	void
677	aio_unlink(pathname,callback=&PL_sv_undef)	822	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
678	SV * pathname
679	SV * callback
680	ALIAS:	823	ALIAS:
681	aio_unlink = REQ_UNLINK	824	aio_unlink = EIO_UNLINK
682	aio_rmdir = REQ_RMDIR	825	aio_rmdir = EIO_RMDIR
		826	aio_readdir = EIO_READDIR
683	CODE:	827	PPCODE:
684	{	828	{
685	dREQ;	829	dREQ;
686		830
687	req->type = ix;	831	req->type = ix;
688	req->data = newSVsv (pathname);	832	req->sv1 = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	833	req->ptr1 = SvPVbyte_nolen (req->sv1);
		834
		835	REQ_SEND;
		836	}
		837
		838	void
		839	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		840	ALIAS:
		841	aio_link = EIO_LINK
		842	aio_symlink = EIO_SYMLINK
		843	aio_rename = EIO_RENAME
		844	PPCODE:
		845	{
		846	dREQ;
690		847
691	send_req (req);	848	req->type = ix;
692	}	849	req->sv1 = newSVsv (oldpath);
693		850	req->ptr1 = SvPVbyte_nolen (req->sv1);
694	void	851	req->sv2 = newSVsv (newpath);
695	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	852	req->ptr2 = SvPVbyte_nolen (req->sv2);
696	SV * oldpath
697	SV * newpath
698	SV * callback
699	CODE:
700	{
701	dREQ;
702		853
703	req->type = REQ_SYMLINK;	854	REQ_SEND;
704	req->fh = newSVsv (oldpath);	855	}
705	req->data2ptr = SvPVbyte_nolen (req->fh);	856
706	req->data = newSVsv (newpath);	857	void
707	req->dataptr = SvPVbyte_nolen (req->data);	858	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		859	PPCODE:
		860	{
		861	dREQ;
708		862
709	send_req (req);	863	req->type = EIO_MKNOD;
		864	req->sv1 = newSVsv (pathname);
		865	req->ptr1 = SvPVbyte_nolen (req->sv1);
		866	req->int2 = (mode_t)mode;
		867	req->offs = dev;
		868
		869	REQ_SEND;
710	}	870	}
711		871
712	void	872	void
		873	aio_busy (double delay, SV *callback=&PL_sv_undef)
		874	PPCODE:
		875	{
		876	dREQ;
		877
		878	req->type = EIO_BUSY;
		879	req->nv1 = delay < 0. ? 0. : delay;
		880
		881	REQ_SEND;
		882	}
		883
		884	void
		885	aio_group (SV *callback=&PL_sv_undef)
		886	PROTOTYPE: ;$
		887	PPCODE:
		888	{
		889	dREQ;
		890
		891	req->type = EIO_GROUP;
		892
		893	eio_submit (req);
		894	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		895	}
		896
		897	void
		898	aio_nop (SV *callback=&PL_sv_undef)
		899	ALIAS:
		900	aio_nop = EIO_NOP
		901	aio_sync = EIO_SYNC
		902	PPCODE:
		903	{
		904	dREQ;
		905
		906	req->type = ix;
		907
		908	REQ_SEND;
		909	}
		910
		911	int
		912	aioreq_pri (int pri = 0)
		913	PROTOTYPE: ;$
		914	CODE:
		915	RETVAL = next_pri;
		916	if (items > 0)
		917	{
		918	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		919	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		920	next_pri = pri;
		921	}
		922	OUTPUT:
		923	RETVAL
		924
		925	void
		926	aioreq_nice (int nice = 0)
		927	CODE:
		928	nice = next_pri - nice;
		929	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		930	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		931	next_pri = nice;
		932
		933	void
713	flush()	934	flush ()
714	PROTOTYPE:	935	PROTOTYPE:
715	CODE:	936	CODE:
716	while (nreqs)	937	while (eio_nreqs ())
717	{	938	{
718	poll_wait ();	939	poll_wait ();
719	poll_cb ();	940	poll_cb ();
720	}	941	}
721		942
722	void	943	int
723	poll()	944	poll()
724	PROTOTYPE:	945	PROTOTYPE:
725	CODE:	946	CODE:
726	if (nreqs)
727	{
728	poll_wait ();	947	poll_wait ();
729	poll_cb ();	948	RETVAL = poll_cb ();
730	}	949	OUTPUT:
		950	RETVAL
731		951
732	int	952	int
733	poll_fileno()	953	poll_fileno()
734	PROTOTYPE:	954	PROTOTYPE:
735	CODE:	955	CODE:
…		…
747		967
748	void	968	void
749	poll_wait()	969	poll_wait()
750	PROTOTYPE:	970	PROTOTYPE:
751	CODE:	971	CODE:
752	if (nreqs)
753	poll_wait ();	972	poll_wait ();
754		973
755	int	974	int
756	nreqs()	975	nreqs()
757	PROTOTYPE:	976	PROTOTYPE:
758	CODE:	977	CODE:
759	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
760	OUTPUT:	979	OUTPUT:
761	RETVAL	980	RETVAL
762		981
		982	int
		983	nready()
		984	PROTOTYPE:
		985	CODE:
		986	RETVAL = eio_nready ();
		987	OUTPUT:
		988	RETVAL
		989
		990	int
		991	npending()
		992	PROTOTYPE:
		993	CODE:
		994	RETVAL = eio_npending ();
		995	OUTPUT:
		996	RETVAL
		997
		998	int
		999	nthreads()
		1000	PROTOTYPE:
		1001	CODE:
		1002	RETVAL = eio_nthreads ();
		1003	OUTPUT:
		1004	RETVAL
		1005
		1006	void _on_next_submit (SV *cb)
		1007	CODE:
		1008	SvREFCNT_dec (on_next_submit);
		1009	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1010
		1011	PROTOTYPES: DISABLE
		1012
		1013	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1014
		1015	void
		1016	cancel (aio_req_ornot req)
		1017	CODE:
		1018	eio_cancel (req);
		1019
		1020	void
		1021	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1022	CODE:
		1023	SvREFCNT_dec (req->callback);
		1024	req->callback = newSVsv (callback);
		1025
		1026	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1027
		1028	void
		1029	add (aio_req grp, ...)
		1030	PPCODE:
		1031	{
		1032	int i;
		1033
		1034	if (grp->int1 == 2)
		1035	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1036
		1037	for (i = 1; i < items; ++i )
		1038	{
		1039	aio_req req;
		1040
		1041	if (GIMME_V != G_VOID)
		1042	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1043
		1044	req = SvAIO_REQ (ST (i));
		1045
		1046	if (req)
		1047	eio_grp_add (grp, req);
		1048	}
		1049	}
		1050
		1051	void
		1052	cancel_subs (aio_req_ornot req)
		1053	CODE:
		1054	req_cancel_subs (req);
		1055
		1056	void
		1057	result (aio_req grp, ...)
		1058	CODE:
		1059	{
		1060	int i;
		1061	AV *av;
		1062
		1063	grp->errorno = errno;
		1064
		1065	av = newAV ();
		1066
		1067	for (i = 1; i < items; ++i )
		1068	av_push (av, newSVsv (ST (i)));
		1069
		1070	SvREFCNT_dec (grp->sv1);
		1071	grp->sv1 = (SV *)av;
		1072	}
		1073
		1074	void
		1075	errno (aio_req grp, int errorno = errno)
		1076	CODE:
		1077	grp->errorno = errorno;
		1078
		1079	void
		1080	limit (aio_req grp, int limit)
		1081	CODE:
		1082	eio_grp_limit (grp, limit);
		1083
		1084	void
		1085	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1086	CODE:
		1087	{
		1088	SvREFCNT_dec (grp->sv2);
		1089	grp->sv2 = newSVsv (callback);
		1090
		1091	if (grp->int2 <= 0)
		1092	grp->int2 = 2;
		1093
		1094	eio_grp_limit (grp, grp->int2);
		1095	}
		1096

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