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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.17 by root, Sun Jul 31 18:45:48 2005 UTC vs.
Revision 1.118 by root, Sun May 11 00:01:03 2008 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 <stddef.h>
6		10	#include <stdlib.h>
		11	#include <errno.h>
7	#include <sys/types.h>	12	#include <sys/types.h>
8	#include <sys/stat.h>	13	#include <sys/stat.h>
9
10	#include <unistd.h>	14	#include <limits.h>
11	#include <fcntl.h>	15	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	16	#include <sched.h>
14		17
15	#include <pthread.h>	18	/* perl namespace pollution */
		19	#undef VERSION
16		20
17	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	#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		22
21	#if __ia64	23	# define EIO_STRUCT_DIRENT Direntry_t
22	# 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
23	#else	59	#else
24	# 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
25	#endif	68	#endif
26		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_COMMON \
		86	SV *callback; \
		87	SV *sv1, *sv2; \
		88	STRLEN stroffset; \
		89	SV *self
		90
		91	#include "libeio/eio.h"
		92
		93	static int req_invoke (eio_req *req);
		94	#define EIO_FINISH(req) req_invoke (req)
		95	static void aio_grp_feed (eio_req *grp);
		96	#define EIO_FEED(req) aio_grp_feed (req)
		97	static void req_destroy (eio_req *grp);
		98	#define EIO_DESTROY(req) req_destroy (req)
		99
27	enum {	100	enum {
28	REQ_QUIT,	101	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	};	102	};
34		103
35	typedef struct aio_cb {	104	#include "libeio/eio.c"
36	struct aio_cb *volatile next;
37		105
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;	106	typedef eio_req *aio_req;
		107	typedef eio_req *aio_req_ornot;
54		108
55	static int started;	109	static SV *on_next_submit;
56	static volatile int nreqs;	110	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
57	static int max_outstanding = 1<<30;	111	static int max_outstanding;
58	static int respipe [2];
59		112
60	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	113	static int respipe_osf [2], respipe [2] = { -1, -1 };
61	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
62	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
63		114
64	static volatile aio_req reqs, reqe; /* queue start, queue end */	115	static void req_destroy (aio_req req);
65	static volatile aio_req ress, rese; /* queue start, queue end */	116	static void req_cancel (aio_req req);
66		117
67	static void	118	static void want_poll (void)
68	poll_wait ()
69	{	119	{
70	if (nreqs && !ress)	120	/* write a dummy byte to the pipe so fh becomes ready */
		121	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		122	}
		123
		124	static void done_poll (void)
		125	{
		126	/* read any signals sent by the worker threads */
		127	char buf [4];
		128	while (respipe_read (respipe [0], buf, 4) == 4)
		129	;
		130	}
		131
		132	/* must be called at most once */
		133	static SV *req_sv (aio_req req, const char *klass)
		134	{
		135	if (!req->self)
71	{	136	{
72	fd_set rfd;	137	req->self = (SV *)newHV ();
73	FD_ZERO(&rfd);	138	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	}	139	}
78	}
79		140
80	static int	141	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
81	poll_cb ()	142	}
		143
		144	static aio_req SvAIO_REQ (SV *sv)
		145	{
		146	MAGIC *mg;
		147
		148	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		149	croak ("object of class " AIO_REQ_KLASS " expected");
		150
		151	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		152
		153	return mg ? (aio_req)mg->mg_ptr : 0;
		154	}
		155
		156	static void aio_grp_feed (aio_req grp)
		157	{
		158	if (grp->sv2 && SvOK (grp->sv2))
		159	{
		160	dSP;
		161
		162	ENTER;
		163	SAVETMPS;
		164	PUSHMARK (SP);
		165	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		166	PUTBACK;
		167	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		168	SPAGAIN;
		169	FREETMPS;
		170	LEAVE;
		171	}
		172	}
		173
		174	static void req_submit (eio_req *req)
		175	{
		176	eio_submit (req);
		177
		178	if (on_next_submit)
		179	{
		180	dSP;
		181	SV *cb = sv_2mortal (on_next_submit);
		182
		183	on_next_submit = 0;
		184
		185	PUSHMARK (SP);
		186	PUTBACK;
		187	call_sv (cb, G_DISCARD | G_EVAL);
		188	}
		189	}
		190
		191	static int req_invoke (eio_req *req)
82	{	192	{
83	dSP;	193	dSP;
84	int count = 0;
85	aio_req req, prv;
86		194
87	pthread_mutex_lock (&reslock);	195	if (req->flags & FLAG_SV2_RO_OFF)
		196	SvREADONLY_off (req->sv2);
88		197
89	{	198	if (!EIO_CANCELLED (req) && SvOK (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	{	199	{
103	nreqs--;	200	ENTER;
		201	SAVETMPS;
		202	PUSHMARK (SP);
		203	EXTEND (SP, 1);
104		204
105	if (req->type == REQ_QUIT)	205	switch (req->type)
106	started--;
107	else
108	{	206	{
109	int errorno = errno;	207	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	{	208	{
124	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	209	SV *rv = &PL_sv_undef;
125	PL_laststatval = req->result;
126	PL_statcache = *(req->statdata);
127		210
128	Safefree (req->statdata);	211	if (req->result >= 0)
		212	{
		213	int i;
		214	char *buf = req->ptr2;
		215	AV *av = newAV ();
		216
		217	av_extend (av, req->result - 1);
		218
		219	for (i = 0; i < req->result; ++i)
		220	{
		221	SV *sv = newSVpv (buf, 0);
		222
		223	av_store (av, i, sv);
		224	buf += SvCUR (sv) + 1;
		225	}
		226
		227	rv = sv_2mortal (newRV_noinc ((SV *)av));
		228	}
		229
		230	PUSHs (rv);
129	}	231	}
		232	break;
130		233
131	ENTER;	234	case EIO_OPEN:
132	PUSHMARK (SP);
133	XPUSHs (sv_2mortal (newSViv (req->result)));
134
135	if (req->type == REQ_OPEN)
136	{	235	{
137	/* convert fd to fh */	236	/* convert fd to fh */
138	SV *fh;	237	SV *fh = &PL_sv_undef;
139		238
140	PUTBACK;	239	if (req->result >= 0)
141	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	240	{
142	SPAGAIN;	241	GV *gv = (GV *)sv_newmortal ();
		242	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		243	char sym [64];
		244	int symlen;
		245
		246	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		247	gv_init (gv, stash, sym, symlen, 0);
143		248
144	fh = SvREFCNT_inc (POPs);	249	symlen = snprintf (
		250	sym,
		251	sizeof (sym),
		252	"%s&=%d",
		253	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		254	req->result
		255	);
145		256
		257	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		258	fh = (SV *)gv;
		259	}
		260
146	PUSHMARK (SP);	261	PUSHs (fh);
147	XPUSHs (sv_2mortal (fh));
148	}	262	}
149
150	if (SvOK (req->callback))
151	{
152	PUTBACK;
153	call_sv (req->callback, G_VOID | G_EVAL);
154	SPAGAIN;
155	}
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	/* work around various missing functions */
236
237	#if !HAVE_PREADWRITE
238	# define pread aio_pread
239	# define pwrite aio_pwrite
240
241	/*
242	* make our pread/pwrite safe against themselves, but not against
243	* normal read/write by using a mutex. slows down execution a lot,
244	* but that's your problem, not mine.
245	*/
246	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
247
248	static ssize_t
249	pread (int fd, void *buf, size_t count, off_t offset)
250	{
251	ssize_t res;
252	off_t ooffset;
253
254	pthread_mutex_lock (&iolock);
255	ooffset = lseek (fd, 0, SEEK_CUR);
256	lseek (fd, offset, SEEK_SET);
257	res = read (fd, buf, count);
258	lseek (fd, ooffset, SEEK_SET);
259	pthread_mutex_unlock (&iolock);
260
261	return res;
262	}
263
264	static ssize_t
265	pwrite (int fd, void *buf, size_t count, off_t offset)
266	{
267	ssize_t res;
268	off_t ooffset;
269
270	pthread_mutex_lock (&iolock);
271	ooffset = lseek (fd, 0, SEEK_CUR);
272	lseek (fd, offset, SEEK_SET);
273	res = write (fd, buf, count);
274	lseek (fd, offset, SEEK_SET);
275	pthread_mutex_unlock (&iolock);
276
277	return res;
278	}
279	#endif
280
281	#if !HAVE_FDATASYNC
282	# define fdatasync fsync
283	#endif
284
285	#if !HAVE_READAHEAD
286	# define readahead aio_readahead
287
288	static char readahead_buf[4096];
289
290	static ssize_t
291	readahead (int fd, off_t offset, size_t count)
292	{
293	while (count > 0)
294	{
295	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
296
297	pread (fd, readahead_buf, len, offset);
298	offset += len;
299	count -= len;
300	}
301
302	errno = 0;
303	}
304	#endif
305
306	static void *
307	aio_proc (void *thr_arg)
308	{
309	aio_req req;
310	int type;
311
312	do
313	{
314	pthread_mutex_lock (&reqlock);
315
316	for (;;)
317	{
318	req = reqs;
319
320	if (reqs)
321	{
322	reqs = reqs->next;
323	if (!reqs) reqe = 0;
324	}
325
326	if (req)
327	break;	263	break;
328		264
329	pthread_cond_wait (&reqwait, &reqlock);	265	case EIO_GROUP:
330	}	266	req->int1 = 2; /* mark group as finished */
331		267
332	pthread_mutex_unlock (&reqlock);	268	if (req->sv1)
333
334	errno = 0; /* strictly unnecessary */
335
336	type = req->type;
337
338	switch (type)
339	{	269	{
340	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	270	int i;
341	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	271	AV *av = (AV *)req->sv1;
342		272
343	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	273	EXTEND (SP, AvFILL (av) + 1);
344		274	for (i = 0; i <= AvFILL (av); ++i)
345	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	275	PUSHs (*av_fetch (av, i, 0));
346	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	276	}
347	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
348
349	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
350	case REQ_CLOSE: req->result = close (req->fd); break;
351	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
352
353	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
354	case REQ_FSYNC: req->result = fsync (req->fd); break;
355
356	case REQ_QUIT:
357	break;	277	break;
358		278
		279	case EIO_NOP:
		280	case EIO_BUSY:
		281	break;
		282
		283	case EIO_READLINK:
		284	if (req->result > 0)
		285	{
		286	SvCUR_set (req->sv2, req->result);
		287	*SvEND (req->sv2) = 0;
		288	PUSHs (req->sv2);
		289	}
		290	break;
		291
		292	case EIO_STAT:
		293	case EIO_LSTAT:
		294	case EIO_FSTAT:
		295	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		296	PL_laststatval = req->result;
		297	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		298	PUSHs (sv_2mortal (newSViv (req->result)));
		299	break;
		300
		301	case EIO_READ:
		302	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		303	*SvEND (req->sv2) = 0;
		304	PUSHs (sv_2mortal (newSViv (req->result)));
		305	break;
		306
		307	case EIO_DUP2:
		308	if (req->result > 0)
		309	req->result = 0;
		310	/* FALLTHROUGH */
		311
359	default:	312	default:
360	req->result = ENOSYS;	313	PUSHs (sv_2mortal (newSViv (req->result)));
361	break;	314	break;
362	}	315	}
363		316
364	req->errorno = errno;	317	errno = req->errorno;
365		318
366	pthread_mutex_lock (&reslock);	319	PUTBACK;
		320	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		321	SPAGAIN;
367		322
368	req->next = 0;	323	FREETMPS;
		324	LEAVE;
369		325
370	if (rese)	326	PUTBACK;
371	{
372	rese->next = req;
373	rese = req;
374	}
375	else
376	{
377	rese = ress = req;
378
379	/* write a dummy byte to the pipe so fh becomes ready */
380	write (respipe [1], &respipe, 1);
381	}
382
383	pthread_mutex_unlock (&reslock);
384	}	327	}
385	while (type != REQ_QUIT);
386		328
		329	return !!SvTRUE (ERRSV);
		330	}
		331
		332	static void req_destroy (aio_req req)
		333	{
		334	if (req->self)
		335	{
		336	sv_unmagic (req->self, PERL_MAGIC_ext);
		337	SvREFCNT_dec (req->self);
		338	}
		339
		340	SvREFCNT_dec (req->sv1);
		341	SvREFCNT_dec (req->sv2);
		342	SvREFCNT_dec (req->callback);
		343
		344	Safefree (req);
		345	}
		346
		347	static void req_cancel_subs (aio_req grp)
		348	{
		349	aio_req sub;
		350
		351	if (grp->type != EIO_GROUP)
		352	return;
		353
		354	SvREFCNT_dec (grp->sv2);
		355	grp->sv2 = 0;
		356
		357	eio_grp_cancel (grp);
		358	}
		359
		360	#ifdef USE_SOCKETS_AS_HANDLES
		361	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		362	#else
		363	# define TO_SOCKET(x) (x)
		364	#endif
		365
		366	static void
		367	create_respipe (void)
		368	{
		369	int old_readfd = respipe [0];
		370
		371	if (respipe [1] >= 0)
		372	respipe_close (TO_SOCKET (respipe [1]));
		373
		374	#ifdef _WIN32
		375	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		376	#else
		377	if (pipe (respipe))
		378	#endif
		379	croak ("unable to initialize result pipe");
		380
		381	if (old_readfd >= 0)
		382	{
		383	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		384	croak ("unable to initialize result pipe(2)");
		385
		386	respipe_close (respipe [0]);
		387	respipe [0] = old_readfd;
		388	}
		389
		390	#ifdef _WIN32
		391	int arg = 1;
		392	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		393	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		394	#else
		395	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		396	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		397	#endif
		398	croak ("unable to initialize result pipe(3)");
		399
		400	respipe_osf [0] = TO_SOCKET (respipe [0]);
		401	respipe_osf [1] = TO_SOCKET (respipe [1]);
		402	}
		403
		404	static void poll_wait (void)
		405	{
		406	fd_set rfd;
		407
		408	while (eio_nreqs ())
		409	{
		410	int size;
		411
		412	X_LOCK (reslock);
		413	size = res_queue.size;
		414	X_UNLOCK (reslock);
		415
		416	if (size)
		417	return;
		418
		419	maybe_start_thread ();
		420
		421	FD_ZERO (&rfd);
		422	FD_SET (respipe [0], &rfd);
		423
		424	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		425	}
		426	}
		427
		428	static int poll_cb (void)
		429	{
		430	int res;
		431
		432	do
		433	{
		434	res = eio_poll ();
		435
		436	if (res > 0)
		437	croak (0);
		438	}
		439	while (max_outstanding && max_outstanding <= eio_nreqs ());
		440
387	return 0;	441	return res;
388	}	442	}
389		443
		444	static void atfork_child (void)
		445	{
		446	create_respipe ();
		447	}
		448
		449	#define dREQ \
		450	aio_req req; \
		451	int req_pri = next_pri; \
		452	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
		453	\
		454	if (SvOK (callback) && !SvROK (callback)) \
		455	croak ("callback must be undef or of reference type"); \
		456	\
		457	Newz (0, req, 1, eio_req); \
		458	if (!req) \
		459	croak ("out of memory during eio_req allocation"); \
		460	\
		461	req->callback = newSVsv (callback); \
		462	req->pri = req_pri
		463
		464	#define REQ_SEND \
		465	req_submit (req); \
		466	\
		467	if (GIMME_V != G_VOID) \
		468	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		469
390	MODULE = IO::AIO PACKAGE = IO::AIO	470	MODULE = IO::AIO PACKAGE = IO::AIO
391		471
392	PROTOTYPES: ENABLE	472	PROTOTYPES: ENABLE
393		473
394	BOOT:	474	BOOT:
395	{	475	{
396	if (pipe (respipe))	476	stash = gv_stashpv ("IO::AIO", 1);
397	croak ("unable to initialize result pipe");
398		477
399	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	478	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
400	croak ("cannot set result pipe to nonblocking mode");	479	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		480	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		481	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		482	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		483	#ifdef _WIN32
		484	X_MUTEX_CHECK (wrklock);
		485	X_MUTEX_CHECK (reslock);
		486	X_MUTEX_CHECK (reqlock);
		487	X_MUTEX_CHECK (reqwait);
		488	X_MUTEX_CHECK (preadwritelock);
		489	X_MUTEX_CHECK (readdirlock);
401		490
402	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	491	X_COND_CHECK (reqwait);
403	croak ("cannot set result pipe to nonblocking mode");	492	#else
404	}	493	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		494	#endif
405		495
		496	create_respipe ();
		497
		498	if (eio_init (want_poll, done_poll) < 0)
		499	croak ("IO::AIO: unable to initialise eio library");
		500
		501	/* atfork child called in fifo order, so before eio's handler */
		502	X_THREAD_ATFORK (0, 0, atfork_child);
		503	}
		504
406	void	505	void
407	min_parallel(nthreads)	506	max_poll_reqs (int nreqs)
408	int nthreads
409	PROTOTYPE: $	507	PROTOTYPE: $
410	CODE:	508	CODE:
411	while (nthreads > started)	509	eio_set_max_poll_reqs (nreqs);
412	start_thread ();
413		510
414	void	511	void
415	max_parallel(nthreads)	512	max_poll_time (double nseconds)
416	int nthreads
417	PROTOTYPE: $	513	PROTOTYPE: $
418	CODE:	514	CODE:
		515	eio_set_max_poll_time (nseconds);
		516
		517	void
		518	min_parallel (int nthreads)
		519	PROTOTYPE: $
		520	CODE:
		521	eio_set_min_parallel (nthreads);
		522
		523	void
		524	max_parallel (int nthreads)
		525	PROTOTYPE: $
		526	CODE:
		527	eio_set_max_parallel (nthreads);
		528
		529	void
		530	max_idle (int nthreads)
		531	PROTOTYPE: $
		532	CODE:
		533	eio_set_max_idle (nthreads);
		534
		535	void
		536	max_outstanding (int maxreqs)
		537	PROTOTYPE: $
		538	CODE:
		539	max_outstanding = maxreqs;
		540
		541	void
		542	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		543	PROTOTYPE: $$$;$
		544	PPCODE:
419	{	545	{
420	int cur = started;	546	dREQ;
421	while (cur > nthreads)	547
422	{	548	req->type = EIO_OPEN;
423	end_thread ();	549	req->sv1 = newSVsv (pathname);
		550	req->ptr1 = SvPVbyte_nolen (req->sv1);
		551	req->int1 = flags;
		552	req->int2 = mode;
		553
		554	REQ_SEND;
		555	}
		556
		557	void
		558	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		559	PROTOTYPE: $;$
		560	ALIAS:
		561	aio_fsync = EIO_FSYNC
		562	aio_fdatasync = EIO_FDATASYNC
		563	PPCODE:
		564	{
		565	dREQ;
		566
		567	req->type = ix;
		568	req->sv1 = newSVsv (fh);
		569	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		570
		571	REQ_SEND (req);
		572	}
		573
		574	void
		575	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		576	PROTOTYPE: $;$
		577	PPCODE:
		578	{
		579	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		580	dREQ;
		581
		582	if (close_pipe < 0)
		583	{
		584	int pipefd [2];
		585
		586	if (pipe (pipefd) < 0
		587	|| close (pipefd [1]) < 0
		588	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		589	abort (); /*D*/
		590
		591	close_pipe = pipefd [0];
		592	}
		593
		594	req->type = EIO_DUP2;
		595	req->int1 = close_pipe;
		596	req->sv2 = newSVsv (fh);
		597	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		598
		599	REQ_SEND (req);
		600	}
		601
		602	void
		603	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		604	ALIAS:
		605	aio_read = EIO_READ
		606	aio_write = EIO_WRITE
		607	PROTOTYPE: $$$$$;$
		608	PPCODE:
		609	{
		610	STRLEN svlen;
		611	char *svptr = SvPVbyte (data, svlen);
		612	UV len = SvUV (length);
		613
		614	SvUPGRADE (data, SVt_PV);
		615	SvPOK_on (data);
		616
		617	if (dataoffset < 0)
		618	dataoffset += svlen;
		619
		620	if (dataoffset < 0 || dataoffset > svlen)
		621	croak ("dataoffset outside of data scalar");
		622
		623	if (ix == EIO_WRITE)
		624	{
		625	/* write: check length and adjust. */
		626	if (!SvOK (length) || len + dataoffset > svlen)
		627	len = svlen - dataoffset;
		628	}
		629	else
		630	{
		631	/* read: grow scalar as necessary */
		632	svptr = SvGROW (data, len + dataoffset + 1);
		633	}
		634
		635	if (len < 0)
		636	croak ("length must not be negative");
		637
		638	{
		639	dREQ;
		640
		641	req->type = ix;
		642	req->sv1 = newSVsv (fh);
		643	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
		644	: IoOFP (sv_2io (fh)));
		645	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		646	req->size = len;
		647	req->sv2 = SvREFCNT_inc (data);
		648	req->ptr2 = (char *)svptr + dataoffset;
		649	req->stroffset = dataoffset;
		650
		651	if (!SvREADONLY (data))
424	cur--;	652	{
		653	SvREADONLY_on (data);
		654	req->flags |= FLAG_SV2_RO_OFF;
425	}	655	}
426		656
427	while (started > nthreads)	657	REQ_SEND;
		658	}
		659	}
		660
		661	void
		662	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		663	PROTOTYPE: $$;$
		664	PPCODE:
		665	{
		666	SV *data;
		667	dREQ;
		668
		669	data = newSV (NAME_MAX);
		670	SvPOK_on (data);
		671
		672	req->type = EIO_READLINK;
		673	req->sv1 = newSVsv (path);
		674	req->ptr1 = SvPVbyte_nolen (req->sv1);
		675	req->sv2 = data;
		676	req->ptr2 = SvPVbyte_nolen (data);
		677
		678	REQ_SEND;
		679	}
		680
		681	void
		682	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		683	PROTOTYPE: $$$$;$
		684	PPCODE:
		685	{
		686	dREQ;
		687
		688	req->type = EIO_SENDFILE;
		689	req->sv1 = newSVsv (out_fh);
		690	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		691	req->sv2 = newSVsv (in_fh);
		692	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		693	req->offs = SvVAL64 (in_offset);
		694	req->size = length;
		695
		696	REQ_SEND;
		697	}
		698
		699	void
		700	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
		701	PROTOTYPE: $$$;$
		702	PPCODE:
		703	{
		704	dREQ;
		705
		706	req->type = EIO_READAHEAD;
		707	req->sv1 = newSVsv (fh);
		708	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		709	req->offs = SvVAL64 (offset);
		710	req->size = length;
		711
		712	REQ_SEND;
		713	}
		714
		715	void
		716	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		717	ALIAS:
		718	aio_stat = EIO_STAT
		719	aio_lstat = EIO_LSTAT
		720	PPCODE:
		721	{
		722	dREQ;
		723
		724	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
		725	if (!req->ptr2)
		726	{
		727	req_destroy (req);
		728	croak ("out of memory during aio_stat statdata allocation");
		729	}
		730
		731	req->flags |= EIO_FLAG_PTR2_FREE;
		732	req->sv1 = newSVsv (fh_or_path);
		733
		734	if (SvPOK (fh_or_path))
		735	{
		736	req->type = ix;
		737	req->ptr1 = SvPVbyte_nolen (req->sv1);
		738	}
		739	else
		740	{
		741	req->type = EIO_FSTAT;
		742	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		743	}
		744
		745	REQ_SEND;
		746	}
		747
		748	void
		749	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		750	PPCODE:
		751	{
		752	dREQ;
		753
		754	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		755	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		756	req->sv1 = newSVsv (fh_or_path);
		757
		758	if (SvPOK (fh_or_path))
		759	{
		760	req->type = EIO_UTIME;
		761	req->ptr1 = SvPVbyte_nolen (req->sv1);
		762	}
		763	else
		764	{
		765	req->type = EIO_FUTIME;
		766	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		767	}
		768
		769	REQ_SEND;
		770	}
		771
		772	void
		773	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		774	PPCODE:
		775	{
		776	dREQ;
		777
		778	req->sv1 = newSVsv (fh_or_path);
		779	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		780
		781	if (SvPOK (fh_or_path))
		782	{
		783	req->type = EIO_TRUNCATE;
		784	req->ptr1 = SvPVbyte_nolen (req->sv1);
		785	}
		786	else
		787	{
		788	req->type = EIO_FTRUNCATE;
		789	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		790	}
		791
		792	REQ_SEND;
		793	}
		794
		795	void
		796	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		797	ALIAS:
		798	aio_chmod = EIO_CHMOD
		799	aio_fchmod = EIO_FCHMOD
		800	aio_mkdir = EIO_MKDIR
		801	PPCODE:
		802	{
		803	dREQ;
		804
		805	req->type = ix;
		806	req->int2 = mode;
		807	req->sv1 = newSVsv (fh_or_path);
		808
		809	if (ix == EIO_FCHMOD)
		810	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		811	else
		812	req->ptr1 = SvPVbyte_nolen (req->sv1);
		813
		814	REQ_SEND;
		815	}
		816
		817	void
		818	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		819	PPCODE:
		820	{
		821	dREQ;
		822
		823	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		824	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		825	req->sv1 = newSVsv (fh_or_path);
		826
		827	if (SvPOK (fh_or_path))
		828	{
		829	req->type = EIO_CHOWN;
		830	req->ptr1 = SvPVbyte_nolen (req->sv1);
		831	}
		832	else
		833	{
		834	req->type = EIO_FCHOWN;
		835	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		836	}
		837
		838	REQ_SEND;
		839	}
		840
		841	void
		842	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		843	ALIAS:
		844	aio_unlink = EIO_UNLINK
		845	aio_rmdir = EIO_RMDIR
		846	aio_readdir = EIO_READDIR
		847	PPCODE:
		848	{
		849	dREQ;
		850
		851	req->type = ix;
		852	req->sv1 = newSVsv (pathname);
		853	req->ptr1 = SvPVbyte_nolen (req->sv1);
		854
		855	REQ_SEND;
		856	}
		857
		858	void
		859	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		860	ALIAS:
		861	aio_link = EIO_LINK
		862	aio_symlink = EIO_SYMLINK
		863	aio_rename = EIO_RENAME
		864	PPCODE:
		865	{
		866	dREQ;
		867
		868	req->type = ix;
		869	req->sv1 = newSVsv (oldpath);
		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871	req->sv2 = newSVsv (newpath);
		872	req->ptr2 = SvPVbyte_nolen (req->sv2);
		873
		874	REQ_SEND;
		875	}
		876
		877	void
		878	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		879	PPCODE:
		880	{
		881	dREQ;
		882
		883	req->type = EIO_MKNOD;
		884	req->sv1 = newSVsv (pathname);
		885	req->ptr1 = SvPVbyte_nolen (req->sv1);
		886	req->int2 = (mode_t)mode;
		887	req->offs = dev;
		888
		889	REQ_SEND;
		890	}
		891
		892	void
		893	aio_busy (double delay, SV *callback=&PL_sv_undef)
		894	PPCODE:
		895	{
		896	dREQ;
		897
		898	req->type = EIO_BUSY;
		899	req->nv1 = delay < 0. ? 0. : delay;
		900
		901	REQ_SEND;
		902	}
		903
		904	void
		905	aio_group (SV *callback=&PL_sv_undef)
		906	PROTOTYPE: ;$
		907	PPCODE:
		908	{
		909	dREQ;
		910
		911	req->type = EIO_GROUP;
		912
		913	eio_submit (req);
		914	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		915	}
		916
		917	void
		918	aio_nop (SV *callback=&PL_sv_undef)
		919	ALIAS:
		920	aio_nop = EIO_NOP
		921	aio_sync = EIO_SYNC
		922	PPCODE:
		923	{
		924	dREQ;
		925
		926	req->type = ix;
		927
		928	REQ_SEND;
		929	}
		930
		931	int
		932	aioreq_pri (int pri = 0)
		933	PROTOTYPE: ;$
		934	CODE:
		935	RETVAL = next_pri - EIO_PRI_BIAS;
		936	if (items > 0)
		937	{
		938	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		939	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		940	next_pri = pri + EIO_PRI_BIAS;
		941	}
		942	OUTPUT:
		943	RETVAL
		944
		945	void
		946	aioreq_nice (int nice = 0)
		947	CODE:
		948	nice = next_pri - nice;
		949	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		950	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		951	next_pri = nice + EIO_PRI_BIAS;
		952
		953	void
		954	flush ()
		955	PROTOTYPE:
		956	CODE:
		957	while (eio_nreqs ())
428	{	958	{
429	poll_wait ();	959	poll_wait ();
430	poll_cb ();	960	poll_cb ();
431	}	961	}
432	}
433		962
434	int	963	int
435	max_outstanding(nreqs)
436	int nreqs
437	PROTOTYPE: $
438	CODE:
439	RETVAL = max_outstanding;
440	max_outstanding = nreqs;
441
442	void
443	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
444	SV * pathname
445	int flags
446	int mode
447	SV * callback
448	PROTOTYPE: $$$;$
449	CODE:
450	{
451	aio_req req;
452
453	Newz (0, req, 1, aio_cb);
454
455	if (!req)
456	croak ("out of memory during aio_req allocation");
457
458	req->type = REQ_OPEN;
459	req->data = newSVsv (pathname);
460	req->dataptr = SvPV_nolen (req->data);
461	req->fd = flags;
462	req->mode = mode;
463	req->callback = SvREFCNT_inc (callback);
464
465	send_req (req);
466	}
467
468	void
469	aio_close(fh,callback=&PL_sv_undef)
470	SV * fh
471	SV * callback
472	PROTOTYPE: $;$
473	ALIAS:
474	aio_close = REQ_CLOSE
475	aio_fsync = REQ_FSYNC
476	aio_fdatasync = REQ_FDATASYNC
477	CODE:
478	{
479	aio_req req;
480
481	Newz (0, req, 1, aio_cb);
482
483	if (!req)
484	croak ("out of memory during aio_req allocation");
485
486	req->type = ix;
487	req->fh = newSVsv (fh);
488	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
489	req->callback = SvREFCNT_inc (callback);
490
491	send_req (req);
492	}
493
494	void
495	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
496	SV * fh
497	UV offset
498	IV length
499	SV * data
500	IV dataoffset
501	SV * callback
502	ALIAS:
503	aio_read = REQ_READ
504	aio_write = REQ_WRITE
505	PROTOTYPE: $$$$$;$
506	CODE:
507	{
508	aio_req req;
509	STRLEN svlen;
510	char *svptr = SvPV (data, svlen);
511
512	SvUPGRADE (data, SVt_PV);
513	SvPOK_on (data);
514
515	if (dataoffset < 0)
516	dataoffset += svlen;
517
518	if (dataoffset < 0 || dataoffset > svlen)
519	croak ("data offset outside of string");
520
521	if (ix == REQ_WRITE)
522	{
523	/* write: check length and adjust. */
524	if (length < 0 || length + dataoffset > svlen)
525	length = svlen - dataoffset;
526	}
527	else
528	{
529	/* read: grow scalar as necessary */
530	svptr = SvGROW (data, length + dataoffset);
531	}
532
533	if (length < 0)
534	croak ("length must not be negative");
535
536	Newz (0, req, 1, aio_cb);
537
538	if (!req)
539	croak ("out of memory during aio_req allocation");
540
541	req->type = ix;
542	req->fh = newSVsv (fh);
543	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
544	: IoOFP (sv_2io (fh)));
545	req->offset = offset;
546	req->length = length;
547	req->data = SvREFCNT_inc (data);
548	req->dataptr = (char *)svptr + dataoffset;
549	req->callback = SvREFCNT_inc (callback);
550
551	send_req (req);
552	}
553
554	void
555	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
556	SV * fh
557	UV offset
558	IV length
559	SV * callback
560	PROTOTYPE: $$$;$
561	CODE:
562	{
563	aio_req req;
564
565	if (length < 0)
566	croak ("length must not be negative");
567
568	Newz (0, req, 1, aio_cb);
569
570	if (!req)
571	croak ("out of memory during aio_req allocation");
572
573	req->type = REQ_READAHEAD;
574	req->fh = newSVsv (fh);
575	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
576	req->offset = offset;
577	req->length = length;
578	req->callback = SvREFCNT_inc (callback);
579
580	send_req (req);
581	}
582
583	void
584	aio_stat(fh_or_path,callback=&PL_sv_undef)
585	SV * fh_or_path
586	SV * callback
587	ALIAS:
588	aio_stat = REQ_STAT
589	aio_lstat = REQ_LSTAT
590	CODE:
591	{
592	aio_req req;
593
594	Newz (0, req, 1, aio_cb);
595
596	if (!req)
597	croak ("out of memory during aio_req allocation");
598
599	New (0, req->statdata, 1, Stat_t);
600
601	if (!req->statdata)
602	croak ("out of memory during aio_req->statdata allocation");
603
604	if (SvPOK (fh_or_path))
605	{
606	req->type = ix;
607	req->data = newSVsv (fh_or_path);
608	req->dataptr = SvPV_nolen (req->data);
609	}
610	else
611	{
612	req->type = REQ_FSTAT;
613	req->fh = newSVsv (fh_or_path);
614	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
615	}
616
617	req->callback = SvREFCNT_inc (callback);
618
619	send_req (req);
620	}
621
622	void
623	aio_unlink(pathname,callback=&PL_sv_undef)
624	SV * pathname
625	SV * callback
626	CODE:
627	{
628	aio_req req;
629
630	Newz (0, req, 1, aio_cb);
631
632	if (!req)
633	croak ("out of memory during aio_req allocation");
634
635	req->type = REQ_UNLINK;
636	req->data = newSVsv (pathname);
637	req->dataptr = SvPV_nolen (req->data);
638	req->callback = SvREFCNT_inc (callback);
639
640	send_req (req);
641	}
642
643	void
644	flush()
645	PROTOTYPE:
646	CODE:
647	while (nreqs)
648	{
649	poll_wait ();
650	poll_cb ();
651	}
652
653	void
654	poll()	964	poll()
655	PROTOTYPE:	965	PROTOTYPE:
656	CODE:	966	CODE:
657	if (nreqs)
658	{
659	poll_wait ();	967	poll_wait ();
660	poll_cb ();	968	RETVAL = poll_cb ();
661	}	969	OUTPUT:
		970	RETVAL
662		971
663	int	972	int
664	poll_fileno()	973	poll_fileno()
665	PROTOTYPE:	974	PROTOTYPE:
666	CODE:	975	CODE:
…		…
678		987
679	void	988	void
680	poll_wait()	989	poll_wait()
681	PROTOTYPE:	990	PROTOTYPE:
682	CODE:	991	CODE:
683	if (nreqs)
684	poll_wait ();	992	poll_wait ();
685		993
686	int	994	int
687	nreqs()	995	nreqs()
688	PROTOTYPE:	996	PROTOTYPE:
689	CODE:	997	CODE:
690	RETVAL = nreqs;	998	RETVAL = eio_nreqs ();
691	OUTPUT:	999	OUTPUT:
692	RETVAL	1000	RETVAL
693		1001
		1002	int
		1003	nready()
		1004	PROTOTYPE:
		1005	CODE:
		1006	RETVAL = eio_nready ();
		1007	OUTPUT:
		1008	RETVAL
		1009
		1010	int
		1011	npending()
		1012	PROTOTYPE:
		1013	CODE:
		1014	RETVAL = eio_npending ();
		1015	OUTPUT:
		1016	RETVAL
		1017
		1018	int
		1019	nthreads()
		1020	PROTOTYPE:
		1021	CODE:
		1022	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1023	RETVAL = started;
		1024	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1025	OUTPUT:
		1026	RETVAL
		1027
		1028	void _on_next_submit (SV *cb)
		1029	CODE:
		1030	SvREFCNT_dec (on_next_submit);
		1031	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1032
		1033	PROTOTYPES: DISABLE
		1034
		1035	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1036
		1037	void
		1038	cancel (aio_req_ornot req)
		1039	CODE:
		1040	eio_cancel (req);
		1041
		1042	void
		1043	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1044	CODE:
		1045	SvREFCNT_dec (req->callback);
		1046	req->callback = newSVsv (callback);
		1047
		1048	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1049
		1050	void
		1051	add (aio_req grp, ...)
		1052	PPCODE:
		1053	{
		1054	int i;
		1055
		1056	if (grp->int1 == 2)
		1057	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1058
		1059	for (i = 1; i < items; ++i )
		1060	{
		1061	aio_req req;
		1062
		1063	if (GIMME_V != G_VOID)
		1064	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1065
		1066	req = SvAIO_REQ (ST (i));
		1067
		1068	if (req)
		1069	eio_grp_add (grp, req);
		1070	}
		1071	}
		1072
		1073	void
		1074	cancel_subs (aio_req_ornot req)
		1075	CODE:
		1076	req_cancel_subs (req);
		1077
		1078	void
		1079	result (aio_req grp, ...)
		1080	CODE:
		1081	{
		1082	int i;
		1083	AV *av;
		1084
		1085	grp->errorno = errno;
		1086
		1087	av = newAV ();
		1088
		1089	for (i = 1; i < items; ++i )
		1090	av_push (av, newSVsv (ST (i)));
		1091
		1092	SvREFCNT_dec (grp->sv1);
		1093	grp->sv1 = (SV *)av;
		1094	}
		1095
		1096	void
		1097	errno (aio_req grp, int errorno = errno)
		1098	CODE:
		1099	grp->errorno = errorno;
		1100
		1101	void
		1102	limit (aio_req grp, int limit)
		1103	CODE:
		1104	eio_grp_limit (grp, limit);
		1105
		1106	void
		1107	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1108	CODE:
		1109	{
		1110	SvREFCNT_dec (grp->sv2);
		1111	grp->sv2 = newSVsv (callback);
		1112
		1113	if (grp->int2 <= 0)
		1114	grp->int2 = 2;
		1115
		1116	eio_grp_limit (grp, grp->int2);
		1117	}
		1118

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