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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.27 by root, Wed Aug 17 04:47:02 2005 UTC vs.
Revision 1.124 by root, Thu May 29 03:20:40 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_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		116
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	117	static void req_destroy (aio_req req);
70	static volatile aio_req ress, rese; /* queue start, queue end */
71
72	static void free_req (aio_req req)	118	static void req_cancel (aio_req req);
73	{
74	if (req->data)
75	SvREFCNT_dec (req->data);
76		119
		120	static void want_poll (void)
		121	{
		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)
		138	{
		139	req->self = (SV *)newHV ();
		140	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		141	}
		142
		143	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		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)
		194	{
		195	dSP;
		196
		197	if (req->flags & FLAG_SV2_RO_OFF)
		198	SvREADONLY_off (req->sv2);
		199
		200	if (!EIO_CANCELLED (req) && SvOK (req->callback))
		201	{
		202	ENTER;
		203	SAVETMPS;
		204	PUSHMARK (SP);
		205	EXTEND (SP, 1);
		206
		207	switch (req->type)
		208	{
		209	case EIO_READDIR:
		210	{
		211	SV *rv = &PL_sv_undef;
		212
		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);
		233	}
		234	break;
		235
		236	case EIO_OPEN:
		237	{
		238	/* convert fd to fh */
		239	SV *fh = &PL_sv_undef;
		240
		241	if (req->result >= 0)
		242	{
		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);
		250
		251	symlen = snprintf (
		252	sym,
		253	sizeof (sym),
		254	"%s&=%d",
		255	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		256	req->result
		257	);
		258
		259	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		260	fh = (SV *)gv;
		261	}
		262
		263	PUSHs (fh);
		264	}
		265	break;
		266
		267	case EIO_GROUP:
		268	req->int1 = 2; /* mark group as finished */
		269
		270	if (req->sv1)
		271	{
		272	int i;
		273	AV *av = (AV *)req->sv1;
		274
		275	EXTEND (SP, AvFILL (av) + 1);
		276	for (i = 0; i <= AvFILL (av); ++i)
		277	PUSHs (*av_fetch (av, i, 0));
		278	}
		279	break;
		280
		281	case EIO_NOP:
		282	case EIO_BUSY:
		283	break;
		284
		285	case EIO_READLINK:
		286	if (req->result > 0)
		287	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		288	break;
		289
		290	case EIO_STAT:
		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;
		313	}
		314
		315	errno = req->errorno;
		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	{
77	if (req->fh)	332	if (req->self)
		333	{
		334	sv_unmagic (req->self, PERL_MAGIC_ext);
78	SvREFCNT_dec (req->fh);	335	SvREFCNT_dec (req->self);
		336	}
79		337
80	if (req->statdata)	338	SvREFCNT_dec (req->sv1);
81	Safefree (req->statdata);	339	SvREFCNT_dec (req->sv2);
82
83	if (req->callback)
84	SvREFCNT_dec (req->callback);	340	SvREFCNT_dec (req->callback);
85		341
86	Safefree (req);	342	Safefree (req);
87	}	343	}
88		344
		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
89	static void	364	static void
90	poll_wait ()	365	create_respipe (void)
91	{	366	{
92	if (nreqs && !ress)	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)
93	{	380	{
94	fd_set rfd;	381	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
95	FD_ZERO(&rfd);	382	croak ("unable to initialize result pipe(2)");
96	FD_SET(respipe [0], &rfd);
97		383
98	select (respipe [0] + 1, &rfd, 0, 0, 0);	384	respipe_close (respipe [0]);
		385	respipe [0] = old_readfd;
99	}	386	}
100	}
101		387
102	static int	388	#ifdef _WIN32
103	poll_cb ()	389	int arg = 1;
104	{	390	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
105	dSP;	391	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
106	int count = 0;	392	#else
107	int do_croak = 0;	393	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
108	aio_req req;	394	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		395	#endif
		396	croak ("unable to initialize result pipe(3)");
109		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	etp_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	{
110	for (;;)	428	for (;;)
111	{	429	{
112	pthread_mutex_lock (&reslock);	430	int res = eio_poll ();
113	req = ress;
114		431
115	if (req)	432	if (res > 0)
116	{
117	ress = req->next;
118
119	if (!ress)
120	{
121	rese = 0;
122
123	/* read any signals sent by the worker threads */
124	char buf [32];
125	while (read (respipe [0], buf, 32) == 32)
126	;
127	}
128	}
129
130	pthread_mutex_unlock (&reslock);
131
132	if (!req)
133	break;
134
135	nreqs--;
136
137	if (req->type == REQ_QUIT)
138	started--;
139	else
140	{
141	int errorno = errno;
142	errno = req->errorno;
143
144	if (req->type == REQ_READ)
145	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
146
147	if (req->statdata)
148	{
149	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
150	PL_laststatval = req->result;
151	PL_statcache = *(req->statdata);
152	}
153
154	ENTER;
155	PUSHMARK (SP);
156	XPUSHs (sv_2mortal (newSViv (req->result)));
157
158	if (req->type == REQ_OPEN)
159	{
160	/* convert fd to fh */
161	SV *fh;
162
163	PUTBACK;
164	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
165	SPAGAIN;
166
167	fh = SvREFCNT_inc (POPs);
168
169	PUSHMARK (SP);
170	XPUSHs (sv_2mortal (fh));
171	}
172
173	if (SvOK (req->callback))
174	{
175	PUTBACK;
176	call_sv (req->callback, G_VOID | G_EVAL);
177	SPAGAIN;
178
179	if (SvTRUE (ERRSV))
180	{
181	free_req (req);
182	croak (0);	433	croak (0);
183	}
184	}
185		434
186	LEAVE;	435	if (!max_outstanding || max_outstanding > eio_nreqs ())
		436	return res;
187		437
188	errno = errorno;	438	poll_wait ();
189	count++;
190	}
191
192	free_req (req);
193	}	439	}
194
195	return count;
196	}
197
198	static void *aio_proc(void *arg);
199
200	static void
201	start_thread (void)
202	{
203	sigset_t fullsigset, oldsigset;
204	pthread_t tid;
205	pthread_attr_t attr;
206
207	pthread_attr_init (&attr);
208	pthread_attr_setstacksize (&attr, STACKSIZE);
209	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
210
211	sigfillset (&fullsigset);
212	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
213
214	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
215	started++;
216
217	sigprocmask (SIG_SETMASK, &oldsigset, 0);
218	}
219
220	static void
221	send_req (aio_req req)
222	{
223	nreqs++;
224
225	pthread_mutex_lock (&reqlock);
226
227	req->next = 0;
228
229	if (reqe)
230	{
231	reqe->next = req;
232	reqe = req;
233	}
234	else
235	reqe = reqs = req;
236
237	pthread_cond_signal (&reqwait);
238	pthread_mutex_unlock (&reqlock);
239
240	if (nreqs > max_outstanding)
241	for (;;)
242	{
243	poll_cb ();
244
245	if (nreqs <= max_outstanding)
246	break;
247
248	poll_wait ();
249	}
250	}
251
252	static void
253	end_thread (void)
254	{
255	aio_req req;
256	Newz (0, req, 1, aio_cb);
257	req->type = REQ_QUIT;
258
259	send_req (req);
260	}
261
262	static void min_parallel (int nthreads)
263	{
264	while (nthreads > started)
265	start_thread ();
266	}
267
268	static void max_parallel (int nthreads)
269	{
270	int cur = started;
271
272	while (cur > nthreads)
273	{
274	end_thread ();
275	cur--;
276	}
277
278	while (started > nthreads)
279	{
280	poll_wait ();
281	poll_cb ();
282	}
283	}
284
285	static void create_pipe ()
286	{
287	if (pipe (respipe))
288	croak ("unable to initialize result pipe");
289
290	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
291	croak ("cannot set result pipe to nonblocking mode");
292
293	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
294	croak ("cannot set result pipe to nonblocking mode");
295	}
296
297	static void atfork_prepare (void)
298	{
299	for (;;) {
300
301	for (;;)
302	{
303	poll_cb ();
304
305	if (!nreqs)
306	break;
307
308	poll_wait ();
309	}
310
311	pthread_mutex_lock (&reqlock);
312
313	if (!nreqs)
314	break;
315
316	pthread_mutex_unlock (&reqlock);
317	}
318
319	pthread_mutex_lock (&reslock);
320
321	assert (!nreqs && !reqs && !ress);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}	440	}
329		441
330	static void atfork_child (void)	442	static void atfork_child (void)
331	{	443	{
332	int restart = started;	444	create_respipe ();
333	started = 0;
334
335	atfork_parent ();
336
337	min_parallel (restart);
338	}
339
340	/*****************************************************************************/
341	/* work around various missing functions */
342
343	#if !HAVE_PREADWRITE
344	# define pread aio_pread
345	# define pwrite aio_pwrite
346
347	/*
348	* make our pread/pwrite safe against themselves, but not against
349	* normal read/write by using a mutex. slows down execution a lot,
350	* but that's your problem, not mine.
351	*/
352	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
353
354	static ssize_t
355	pread (int fd, void *buf, size_t count, off_t offset)
356	{
357	ssize_t res;
358	off_t ooffset;
359
360	pthread_mutex_lock (&iolock);
361	ooffset = lseek (fd, 0, SEEK_CUR);
362	lseek (fd, offset, SEEK_SET);
363	res = read (fd, buf, count);
364	lseek (fd, ooffset, SEEK_SET);
365	pthread_mutex_unlock (&iolock);
366
367	return res;
368	}
369
370	static ssize_t
371	pwrite (int fd, void *buf, size_t count, off_t offset)
372	{
373	ssize_t res;
374	off_t ooffset;
375
376	pthread_mutex_lock (&iolock);
377	ooffset = lseek (fd, 0, SEEK_CUR);
378	lseek (fd, offset, SEEK_SET);
379	res = write (fd, buf, count);
380	lseek (fd, offset, SEEK_SET);
381	pthread_mutex_unlock (&iolock);
382
383	return res;
384	}
385	#endif
386
387	#if !HAVE_FDATASYNC
388	# define fdatasync fsync
389	#endif
390
391	#if !HAVE_READAHEAD
392	# define readahead aio_readahead
393
394	static char readahead_buf[4096];
395
396	static ssize_t
397	readahead (int fd, off_t offset, size_t count)
398	{
399	while (count > 0)
400	{
401	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
402
403	pread (fd, readahead_buf, len, offset);
404	offset += len;
405	count -= len;
406	}
407
408	errno = 0;
409	}
410	#endif
411
412	/*****************************************************************************/
413
414	static void *
415	aio_proc (void *thr_arg)
416	{
417	aio_req req;
418	int type;
419
420	do
421	{
422	pthread_mutex_lock (&reqlock);
423
424	for (;;)
425	{
426	req = reqs;
427
428	if (reqs)
429	{
430	reqs = reqs->next;
431	if (!reqs) reqe = 0;
432	}
433
434	if (req)
435	break;
436
437	pthread_cond_wait (&reqwait, &reqlock);
438	}
439
440	pthread_mutex_unlock (&reqlock);
441
442	errno = 0; /* strictly unnecessary */
443
444	type = req->type;
445
446	switch (type)
447	{
448	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
449	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
450
451	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
452
453	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
454	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
455	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
456
457	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
458	case REQ_CLOSE: req->result = close (req->fd); break;
459	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
460	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
461	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
462
463	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
464	case REQ_FSYNC: req->result = fsync (req->fd); break;
465
466	case REQ_QUIT:
467	break;
468
469	default:
470	req->result = ENOSYS;
471	break;
472	}
473
474	req->errorno = errno;
475
476	pthread_mutex_lock (&reslock);
477
478	req->next = 0;
479
480	if (rese)
481	{
482	rese->next = req;
483	rese = req;
484	}
485	else
486	{
487	rese = ress = req;
488
489	/* write a dummy byte to the pipe so fh becomes ready */
490	write (respipe [1], &respipe, 1);
491	}
492
493	pthread_mutex_unlock (&reslock);
494	}
495	while (type != REQ_QUIT);
496
497	return 0;
498	}	445	}
499		446
500	#define dREQ \	447	#define dREQ \
501	aio_req req; \	448	aio_req req; \
		449	int req_pri = next_pri; \
		450	next_pri = EIO_PRI_DEFAULT; \
502	\	451	\
503	if (SvOK (callback) && !SvROK (callback)) \	452	if (SvOK (callback) && !SvROK (callback)) \
504	croak ("clalback must be undef or of reference type"); \	453	croak ("callback must be undef or of reference type"); \
505	\	454	\
506	Newz (0, req, 1, aio_cb); \	455	Newz (0, req, 1, eio_req); \
507	if (!req) \	456	if (!req) \
508	croak ("out of memory during aio_req allocation"); \	457	croak ("out of memory during eio_req allocation"); \
509	\	458	\
510	req->callback = newSVsv (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));
511		467
512	MODULE = IO::AIO PACKAGE = IO::AIO	468	MODULE = IO::AIO PACKAGE = IO::AIO
513		469
514	PROTOTYPES: ENABLE	470	PROTOTYPES: ENABLE
515		471
516	BOOT:	472	BOOT:
517	{	473	{
518	create_pipe ();	474	stash = gv_stashpv ("IO::AIO", 1);
519	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
520	}
521		475
		476	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		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
		484
		485	create_respipe ();
		486
		487	if (eio_init (want_poll, done_poll) < 0)
		488	croak ("IO::AIO: unable to initialise eio library");
		489
		490	/* atfork child called in fifo order, so before eio's handler */
		491	X_THREAD_ATFORK (0, 0, atfork_child);
		492	}
		493
522	void	494	void
523	min_parallel(nthreads)	495	max_poll_reqs (int nreqs)
524	int nthreads
525	PROTOTYPE: $	496	PROTOTYPE: $
		497	CODE:
		498	eio_set_max_poll_reqs (nreqs);
526		499
527	void	500	void
528	max_parallel(nthreads)	501	max_poll_time (double nseconds)
529	int nthreads
530	PROTOTYPE: $	502	PROTOTYPE: $
531
532	int
533	max_outstanding(nreqs)
534	int nreqs
535	PROTOTYPE: $
536	CODE:	503	CODE:
537	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:
538	max_outstanding = nreqs;	528	max_outstanding = maxreqs;
539		529
540	void	530	void
541	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	531	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
542	SV * pathname
543	int flags
544	int mode
545	SV * callback
546	PROTOTYPE: $$$;$	532	PROTOTYPE: $$$;$
547	CODE:	533	PPCODE:
548	{	534	{
549	dREQ;	535	dREQ;
550		536
551	req->type = REQ_OPEN;	537	req->type = EIO_OPEN;
552	req->data = newSVsv (pathname);	538	req->sv1 = newSVsv (pathname);
553	req->dataptr = SvPVbyte_nolen (req->data);	539	req->ptr1 = SvPVbyte_nolen (req->sv1);
554	req->fd = flags;	540	req->int1 = flags;
555	req->mode = mode;	541	req->int2 = mode;
556		542
557	send_req (req);	543	REQ_SEND;
558	}	544	}
559		545
560	void	546	void
561	aio_close(fh,callback=&PL_sv_undef)	547	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
562	SV * fh
563	SV * callback
564	PROTOTYPE: $;$	548	PROTOTYPE: $;$
565	ALIAS:	549	ALIAS:
566	aio_close = REQ_CLOSE
567	aio_fsync = REQ_FSYNC	550	aio_fsync = EIO_FSYNC
568	aio_fdatasync = REQ_FDATASYNC	551	aio_fdatasync = EIO_FDATASYNC
569	CODE:	552	PPCODE:
570	{	553	{
571	dREQ;	554	dREQ;
572		555
573	req->type = ix;	556	req->type = ix;
574	req->fh = newSVsv (fh);	557	req->sv1 = newSVsv (fh);
575	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	558	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
576		559
577	send_req (req);	560	REQ_SEND (req);
578	}	561	}
579		562
580	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
581	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)
582	SV * fh
583	UV offset
584	IV length
585	SV * data
586	IV dataoffset
587	SV * callback
588	ALIAS:	593	ALIAS:
589	aio_read = REQ_READ	594	aio_read = EIO_READ
590	aio_write = REQ_WRITE	595	aio_write = EIO_WRITE
591	PROTOTYPE: $$$$$;$	596	PROTOTYPE: $$$$$;$
592	CODE:	597	PPCODE:
593	{	598	{
594	aio_req req;
595	STRLEN svlen;	599	STRLEN svlen;
596	char *svptr = SvPVbyte (data, svlen);	600	char *svptr = SvPVbyte (data, svlen);
		601	UV len = SvUV (length);
597		602
598	SvUPGRADE (data, SVt_PV);	603	SvUPGRADE (data, SVt_PV);
599	SvPOK_on (data);	604	SvPOK_on (data);
600		605
601	if (dataoffset < 0)	606	if (dataoffset < 0)
602	dataoffset += svlen;	607	dataoffset += svlen;
603		608
604	if (dataoffset < 0 || dataoffset > svlen)	609	if (dataoffset < 0 || dataoffset > svlen)
605	croak ("data offset outside of string");	610	croak ("dataoffset outside of data scalar");
606		611
607	if (ix == REQ_WRITE)	612	if (ix == EIO_WRITE)
608	{	613	{
609	/* write: check length and adjust. */	614	/* write: check length and adjust. */
610	if (length < 0 || length + dataoffset > svlen)	615	if (!SvOK (length) || len + dataoffset > svlen)
611	length = svlen - dataoffset;	616	len = svlen - dataoffset;
612	}	617	}
613	else	618	else
614	{	619	{
615	/* read: grow scalar as necessary */	620	/* read: grow scalar as necessary */
616	svptr = SvGROW (data, length + dataoffset);	621	svptr = SvGROW (data, len + dataoffset + 1);
617	}	622	}
618		623
619	if (length < 0)	624	if (len < 0)
620	croak ("length must not be negative");	625	croak ("length must not be negative");
621		626
622	{	627	{
623	dREQ;	628	dREQ;
624		629
625	req->type = ix;	630	req->type = ix;
626	req->fh = newSVsv (fh);	631	req->sv1 = newSVsv (fh);
627	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	632	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
628	: IoOFP (sv_2io (fh)));	633	: IoOFP (sv_2io (fh)));
		634	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
629	req->offset = offset;	635	req->size = len;
630	req->length = length;
631	req->data = SvREFCNT_inc (data);	636	req->sv2 = SvREFCNT_inc (data);
632	req->dataptr = (char *)svptr + dataoffset;	637	req->ptr2 = (char *)svptr + dataoffset;
		638	req->stroffset = dataoffset;
633		639
634	send_req (req);	640	if (!SvREADONLY (data))
		641	{
		642	SvREADONLY_on (data);
		643	req->flags |= FLAG_SV2_RO_OFF;
		644	}
		645
		646	REQ_SEND;
635	}	647	}
636	}	648	}
637		649
638	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: $$$$;$
		668	PPCODE:
		669	{
		670	dREQ;
		671
		672	req->type = EIO_SENDFILE;
		673	req->sv1 = newSVsv (out_fh);
		674	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		675	req->sv2 = newSVsv (in_fh);
		676	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		677	req->offs = SvVAL64 (in_offset);
		678	req->size = length;
		679
		680	REQ_SEND;
		681	}
		682
		683	void
639	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	684	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
640	SV * fh
641	UV offset
642	IV length
643	SV * callback
644	PROTOTYPE: $$$;$	685	PROTOTYPE: $$$;$
645	CODE:	686	PPCODE:
646	{	687	{
647	dREQ;	688	dREQ;
648		689
649	req->type = REQ_READAHEAD;	690	req->type = EIO_READAHEAD;
650	req->fh = newSVsv (fh);	691	req->sv1 = newSVsv (fh);
651	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	692	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
652	req->offset = offset;	693	req->offs = SvVAL64 (offset);
653	req->length = length;	694	req->size = length;
654		695
655	send_req (req);	696	REQ_SEND;
656	}	697	}
657		698
658	void	699	void
659	aio_stat(fh_or_path,callback=&PL_sv_undef)	700	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
660	SV * fh_or_path
661	SV * callback
662	ALIAS:	701	ALIAS:
663	aio_stat = REQ_STAT	702	aio_stat = EIO_STAT
664	aio_lstat = REQ_LSTAT	703	aio_lstat = EIO_LSTAT
665	CODE:	704	PPCODE:
666	{	705	{
667	dREQ;	706	dREQ;
668		707
669	New (0, req->statdata, 1, Stat_t);	708	req->sv1 = newSVsv (fh_or_path);
670	if (!req->statdata)
671	{
672	free_req (req);
673	croak ("out of memory during aio_req->statdata allocation");
674	}
675		709
676	if (SvPOK (fh_or_path))	710	if (SvPOK (req->sv1))
677	{	711	{
678	req->type = ix;	712	req->type = ix;
679	req->data = newSVsv (fh_or_path);
680	req->dataptr = SvPVbyte_nolen (req->data);	713	req->ptr1 = SvPVbyte_nolen (req->sv1);
681	}	714	}
682	else	715	else
683	{	716	{
684	req->type = REQ_FSTAT;	717	req->type = EIO_FSTAT;
685	req->fh = newSVsv (fh_or_path);
686	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))
687	}	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	}
688		744
689	send_req (req);	745	REQ_SEND;
690	}	746	}
691		747
692	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
693	aio_unlink(pathname,callback=&PL_sv_undef)	822	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
694	SV * pathname
695	SV * callback
696	ALIAS:	823	ALIAS:
697	aio_unlink = REQ_UNLINK	824	aio_unlink = EIO_UNLINK
698	aio_rmdir = REQ_RMDIR	825	aio_rmdir = EIO_RMDIR
		826	aio_readdir = EIO_READDIR
699	CODE:	827	PPCODE:
700	{	828	{
701	dREQ;	829	dREQ;
702		830
703	req->type = ix;	831	req->type = ix;
704	req->data = newSVsv (pathname);	832	req->sv1 = newSVsv (pathname);
705	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;
706		847
707	send_req (req);	848	req->type = ix;
708	}	849	req->sv1 = newSVsv (oldpath);
709		850	req->ptr1 = SvPVbyte_nolen (req->sv1);
710	void	851	req->sv2 = newSVsv (newpath);
711	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	852	req->ptr2 = SvPVbyte_nolen (req->sv2);
712	SV * oldpath
713	SV * newpath
714	SV * callback
715	CODE:
716	{
717	dREQ;
718		853
719	req->type = REQ_SYMLINK;	854	REQ_SEND;
720	req->fh = newSVsv (oldpath);	855	}
721	req->data2ptr = SvPVbyte_nolen (req->fh);	856
722	req->data = newSVsv (newpath);	857	void
723	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;
724		862
725	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;
726	}	870	}
727		871
728	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
729	flush()	934	flush ()
730	PROTOTYPE:	935	PROTOTYPE:
731	CODE:	936	CODE:
732	while (nreqs)	937	while (eio_nreqs ())
733	{	938	{
734	poll_wait ();	939	poll_wait ();
735	poll_cb ();	940	poll_cb ();
736	}	941	}
737		942
738	void	943	int
739	poll()	944	poll()
740	PROTOTYPE:	945	PROTOTYPE:
741	CODE:	946	CODE:
742	if (nreqs)
743	{
744	poll_wait ();	947	poll_wait ();
745	poll_cb ();	948	RETVAL = poll_cb ();
746	}	949	OUTPUT:
		950	RETVAL
747		951
748	int	952	int
749	poll_fileno()	953	poll_fileno()
750	PROTOTYPE:	954	PROTOTYPE:
751	CODE:	955	CODE:
…		…
763		967
764	void	968	void
765	poll_wait()	969	poll_wait()
766	PROTOTYPE:	970	PROTOTYPE:
767	CODE:	971	CODE:
768	if (nreqs)
769	poll_wait ();	972	poll_wait ();
770		973
771	int	974	int
772	nreqs()	975	nreqs()
773	PROTOTYPE:	976	PROTOTYPE:
774	CODE:	977	CODE:
775	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
776	OUTPUT:	979	OUTPUT:
777	RETVAL	980	RETVAL
778		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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