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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.26 by root, Wed Aug 17 03:52:20 2005 UTC vs.
Revision 1.126 by root, Thu Sep 25 07:56:07 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	/* perl stupidly overrides readdir and maybe others */
		71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
		83	#endif
		84
		85	static HV *stash;
		86	typedef SV SV8; /* byte-sv, used for argument-checking */
		87
		88	#define AIO_REQ_KLASS "IO::AIO::REQ"
		89	#define AIO_GRP_KLASS "IO::AIO::GRP"
		90
		91	#define EIO_REQ_MEMBERS \
		92	SV *callback; \
		93	SV *sv1, *sv2; \
		94	STRLEN stroffset; \
		95	SV *self;
		96
		97	#define EIO_NO_WRAPPERS 1
		98
		99	#include "libeio/eio.h"
		100
		101	static int req_invoke (eio_req *req);
		102	#define EIO_FINISH(req) req_invoke (req)
		103	static void aio_grp_feed (eio_req *grp);
		104	#define EIO_FEED(req) aio_grp_feed (req)
		105	static void req_destroy (eio_req *grp);
		106	#define EIO_DESTROY(req) req_destroy (req)
		107
30	enum {	108	enum {
31	REQ_QUIT,	109	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	};	110	};
39		111
40	typedef struct aio_cb {	112	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		113
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;	114	typedef eio_req *aio_req;
		115	typedef eio_req *aio_req_ornot;
59		116
60	static int started;	117	static SV *on_next_submit;
61	static volatile int nreqs;	118	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	119	static int max_outstanding;
63	static int respipe [2];
64		120
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	121	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		122
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	123	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */
72
73	static void free_req (aio_req req)	124	static void req_cancel (aio_req req);
74	{
75	if (req->data)
76	SvREFCNT_dec (req->data);
77		125
		126	static void want_poll (void)
		127	{
		128	/* write a dummy byte to the pipe so fh becomes ready */
		129	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		130	}
		131
		132	static void done_poll (void)
		133	{
		134	/* read any signals sent by the worker threads */
		135	char buf [4];
		136	while (respipe_read (respipe [0], buf, 4) == 4)
		137	;
		138	}
		139
		140	/* must be called at most once */
		141	static SV *req_sv (aio_req req, const char *klass)
		142	{
78	if (req->fh)	143	if (!req->self)
79	SvREFCNT_dec (req->fh);
80
81	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
82	Safefree (req->statdata);
83
84	if (req->callback)
85	SvREFCNT_dec (req->callback);
86
87	Safefree (req);
88	}
89
90	static void
91	poll_wait ()
92	{
93	if (nreqs && !ress)
94	{	144	{
95	fd_set rfd;	145	req->self = (SV *)newHV ();
96	FD_ZERO(&rfd);	146	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
97	FD_SET(respipe [0], &rfd);
98
99	select (respipe [0] + 1, &rfd, 0, 0, 0);
100	}	147	}
101	}
102		148
103	static int	149	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
104	poll_cb ()	150	}
		151
		152	static aio_req SvAIO_REQ (SV *sv)
		153	{
		154	MAGIC *mg;
		155
		156	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		157	croak ("object of class " AIO_REQ_KLASS " expected");
		158
		159	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		160
		161	return mg ? (aio_req)mg->mg_ptr : 0;
		162	}
		163
		164	static void aio_grp_feed (aio_req grp)
		165	{
		166	if (grp->sv2 && SvOK (grp->sv2))
		167	{
		168	dSP;
		169
		170	ENTER;
		171	SAVETMPS;
		172	PUSHMARK (SP);
		173	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		174	PUTBACK;
		175	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		176	SPAGAIN;
		177	FREETMPS;
		178	LEAVE;
		179	}
		180	}
		181
		182	static void req_submit (eio_req *req)
		183	{
		184	eio_submit (req);
		185
		186	if (on_next_submit)
		187	{
		188	dSP;
		189	SV *cb = sv_2mortal (on_next_submit);
		190
		191	on_next_submit = 0;
		192
		193	PUSHMARK (SP);
		194	PUTBACK;
		195	call_sv (cb, G_DISCARD | G_EVAL);
		196	}
		197	}
		198
		199	static int req_invoke (eio_req *req)
105	{	200	{
106	dSP;	201	dSP;
107	int count = 0;
108	int do_croak = 0;
109	aio_req req, prv;
110		202
111	pthread_mutex_lock (&reslock);	203	if (req->flags & FLAG_SV2_RO_OFF)
		204	SvREADONLY_off (req->sv2);
112		205
113	{	206	if (!EIO_CANCELLED (req) && SvOK (req->callback))
114	/* read any signals sent by the worker threads */
115	char buf [32];
116	while (read (respipe [0], buf, 32) == 32)
117	;
118	}
119
120	req = ress;
121	ress = rese = 0;
122
123	pthread_mutex_unlock (&reslock);
124
125	while (req)
126	{	207	{
127	nreqs--;	208	ENTER;
		209	SAVETMPS;
		210	PUSHMARK (SP);
		211	EXTEND (SP, 1);
128		212
129	if (req->type == REQ_QUIT)	213	switch (req->type)
130	started--;
131	else
132	{	214	{
133	int errorno = errno;	215	case EIO_READDIR:
134	errno = req->errorno;
135
136	if (req->type == REQ_READ)
137	SvCUR_set (req->data, req->dataoffset
138	+ req->result > 0 ? req->result : 0);
139
140	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
141	{	216	{
142	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	217	SV *rv = &PL_sv_undef;
143	PL_laststatval = req->result;	218
144	PL_statcache = *(req->statdata);	219	if (req->result >= 0)
		220	{
		221	int i;
		222	char *buf = req->ptr2;
		223	AV *av = newAV ();
		224
		225	av_extend (av, req->result - 1);
		226
		227	for (i = 0; i < req->result; ++i)
		228	{
		229	SV *sv = newSVpv (buf, 0);
		230
		231	av_store (av, i, sv);
		232	buf += SvCUR (sv) + 1;
		233	}
		234
		235	rv = sv_2mortal (newRV_noinc ((SV *)av));
		236	}
		237
		238	PUSHs (rv);
145	}	239	}
		240	break;
146		241
147	ENTER;	242	case EIO_OPEN:
148	PUSHMARK (SP);
149	XPUSHs (sv_2mortal (newSViv (req->result)));
150
151	if (req->type == REQ_OPEN)
152	{	243	{
153	/* convert fd to fh */	244	/* convert fd to fh */
154	SV *fh;	245	SV *fh = &PL_sv_undef;
155		246
156	PUTBACK;	247	if (req->result >= 0)
157	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	248	{
158	SPAGAIN;	249	GV *gv = (GV *)sv_newmortal ();
		250	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		251	char sym [64];
		252	int symlen;
		253
		254	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		255	gv_init (gv, stash, sym, symlen, 0);
159		256
160	fh = SvREFCNT_inc (POPs);	257	symlen = snprintf (
		258	sym,
		259	sizeof (sym),
		260	"%s&=%d",
		261	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		262	req->result
		263	);
161		264
		265	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		266	fh = (SV *)gv;
		267	}
		268
162	PUSHMARK (SP);	269	PUSHs (fh);
163	XPUSHs (sv_2mortal (fh));
164	}	270	}
165
166	if (SvOK (req->callback))
167	{
168	PUTBACK;
169	call_sv (req->callback, G_VOID | G_EVAL);
170	SPAGAIN;
171	}
172
173	LEAVE;
174
175	do_croak = SvTRUE (ERRSV);
176
177	errno = errorno;
178	count++;
179	}
180
181	prv = req;
182	req = req->next;
183	free_req (prv);
184
185	if (do_croak)
186	croak (0);
187	}
188
189	return count;
190	}
191
192	static void *aio_proc(void *arg);
193
194	static void
195	start_thread (void)
196	{
197	sigset_t fullsigset, oldsigset;
198	pthread_t tid;
199	pthread_attr_t attr;
200
201	pthread_attr_init (&attr);
202	pthread_attr_setstacksize (&attr, STACKSIZE);
203	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
204
205	sigfillset (&fullsigset);
206	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
207
208	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
209	started++;
210
211	sigprocmask (SIG_SETMASK, &oldsigset, 0);
212	}
213
214	static void
215	send_req (aio_req req)
216	{
217	nreqs++;
218
219	pthread_mutex_lock (&reqlock);
220
221	req->next = 0;
222
223	if (reqe)
224	{
225	reqe->next = req;
226	reqe = req;
227	}
228	else
229	reqe = reqs = req;
230
231	pthread_cond_signal (&reqwait);
232	pthread_mutex_unlock (&reqlock);
233
234	while (nreqs > max_outstanding)
235	{
236	poll_wait ();
237	poll_cb ();
238	}
239	}
240
241	static void
242	end_thread (void)
243	{
244	aio_req req;
245	Newz (0, req, 1, aio_cb);
246	req->type = REQ_QUIT;
247
248	send_req (req);
249	}
250
251
252	static void min_parallel (int nthreads)
253	{
254	while (nthreads > started)
255	start_thread ();
256	}
257
258	static void max_parallel (int nthreads)
259	{
260	int cur = started;
261	while (cur > nthreads)
262	{
263	end_thread ();
264	cur--;
265	}
266
267	while (started > nthreads)
268	{
269	poll_wait ();
270	poll_cb ();
271	}
272	}
273
274	static void create_pipe ()
275	{
276	if (pipe (respipe))
277	croak ("unable to initialize result pipe");
278
279	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
280	croak ("cannot set result pipe to nonblocking mode");
281
282	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
283	croak ("cannot set result pipe to nonblocking mode");
284	}
285
286	static void atfork_prepare (void)
287	{
288	pthread_mutex_lock (&frklock);
289	pthread_mutex_lock (&reqlock);
290	pthread_mutex_lock (&reslock);
291	}
292
293	static void atfork_parent (void)
294	{
295	pthread_mutex_unlock (&reslock);
296	pthread_mutex_unlock (&reqlock);
297	pthread_mutex_unlock (&frklock);
298	}
299
300	static void atfork_child (void)
301	{
302	int restart = started;
303	started = 0;
304
305	while (reqs)
306	{
307	free_req (reqs);
308	reqs = reqs->next;
309	}
310
311	reqs = reqe = 0;
312
313	while (ress)
314	{
315	free_req (ress);
316	ress = ress->next;
317	}
318
319	ress = rese = 0;
320
321	close (respipe [0]);
322	close (respipe [1]);
323
324	create_pipe ();
325
326	atfork_parent ();
327
328	min_parallel (restart);
329	}
330
331	/*****************************************************************************/
332	/* work around various missing functions */
333
334	#if !HAVE_PREADWRITE
335	# define pread aio_pread
336	# define pwrite aio_pwrite
337
338	/*
339	* make our pread/pwrite safe against themselves, but not against
340	* normal read/write by using a mutex. slows down execution a lot,
341	* but that's your problem, not mine.
342	*/
343	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
344
345	static ssize_t
346	pread (int fd, void *buf, size_t count, off_t offset)
347	{
348	ssize_t res;
349	off_t ooffset;
350
351	pthread_mutex_lock (&iolock);
352	ooffset = lseek (fd, 0, SEEK_CUR);
353	lseek (fd, offset, SEEK_SET);
354	res = read (fd, buf, count);
355	lseek (fd, ooffset, SEEK_SET);
356	pthread_mutex_unlock (&iolock);
357
358	return res;
359	}
360
361	static ssize_t
362	pwrite (int fd, void *buf, size_t count, off_t offset)
363	{
364	ssize_t res;
365	off_t ooffset;
366
367	pthread_mutex_lock (&iolock);
368	ooffset = lseek (fd, 0, SEEK_CUR);
369	lseek (fd, offset, SEEK_SET);
370	res = write (fd, buf, count);
371	lseek (fd, offset, SEEK_SET);
372	pthread_mutex_unlock (&iolock);
373
374	return res;
375	}
376	#endif
377
378	#if !HAVE_FDATASYNC
379	# define fdatasync fsync
380	#endif
381
382	#if !HAVE_READAHEAD
383	# define readahead aio_readahead
384
385	static char readahead_buf[4096];
386
387	static ssize_t
388	readahead (int fd, off_t offset, size_t count)
389	{
390	while (count > 0)
391	{
392	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
393
394	pread (fd, readahead_buf, len, offset);
395	offset += len;
396	count -= len;
397	}
398
399	errno = 0;
400	}
401	#endif
402
403	/*****************************************************************************/
404
405	static void *
406	aio_proc (void *thr_arg)
407	{
408	aio_req req;
409	int type;
410
411	do
412	{
413	pthread_mutex_lock (&reqlock);
414
415	for (;;)
416	{
417	req = reqs;
418
419	if (reqs)
420	{
421	reqs = reqs->next;
422	if (!reqs) reqe = 0;
423	}
424
425	if (req)
426	break;	271	break;
427		272
428	pthread_cond_wait (&reqwait, &reqlock);	273	case EIO_GROUP:
429	}	274	req->int1 = 2; /* mark group as finished */
430		275
431	pthread_mutex_unlock (&reqlock);	276	if (req->sv1)
432
433	errno = 0; /* strictly unnecessary */
434
435	type = req->type;
436
437	switch (type)
438	{	277	{
439	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	278	int i;
440	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	279	AV *av = (AV *)req->sv1;
441		280
442	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	281	EXTEND (SP, AvFILL (av) + 1);
443		282	for (i = 0; i <= AvFILL (av); ++i)
444	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	283	PUSHs (*av_fetch (av, i, 0));
445	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	284	}
446	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
447
448	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
449	case REQ_CLOSE: req->result = close (req->fd); break;
450	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
451	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
452	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
453
454	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
455	case REQ_FSYNC: req->result = fsync (req->fd); break;
456
457	case REQ_QUIT:
458	break;	285	break;
459		286
		287	case EIO_NOP:
		288	case EIO_BUSY:
		289	break;
		290
		291	case EIO_READLINK:
		292	if (req->result > 0)
		293	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		294	break;
		295
		296	case EIO_STAT:
		297	case EIO_LSTAT:
		298	case EIO_FSTAT:
		299	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		300	PL_laststatval = req->result;
		301	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		302	PUSHs (sv_2mortal (newSViv (req->result)));
		303	break;
		304
		305	case EIO_READ:
		306	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		307	*SvEND (req->sv2) = 0;
		308	PUSHs (sv_2mortal (newSViv (req->result)));
		309	break;
		310
		311	case EIO_DUP2:
		312	if (req->result > 0)
		313	req->result = 0;
		314	/* FALLTHROUGH */
		315
460	default:	316	default:
461	req->result = ENOSYS;	317	PUSHs (sv_2mortal (newSViv (req->result)));
462	break;	318	break;
463	}	319	}
464		320
465	req->errorno = errno;	321	errno = req->errorno;
466		322
467	pthread_mutex_lock (&reslock);	323	PUTBACK;
		324	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		325	SPAGAIN;
468		326
469	req->next = 0;	327	FREETMPS;
		328	LEAVE;
470		329
471	if (rese)	330	PUTBACK;
472	{
473	rese->next = req;
474	rese = req;
475	}
476	else
477	{
478	rese = ress = req;
479
480	/* write a dummy byte to the pipe so fh becomes ready */
481	write (respipe [1], &respipe, 1);
482	}
483
484	pthread_mutex_unlock (&reslock);
485	}	331	}
486	while (type != REQ_QUIT);
487		332
		333	return !!SvTRUE (ERRSV);
		334	}
		335
		336	static void req_destroy (aio_req req)
		337	{
		338	if (req->self)
		339	{
		340	sv_unmagic (req->self, PERL_MAGIC_ext);
		341	SvREFCNT_dec (req->self);
		342	}
		343
		344	SvREFCNT_dec (req->sv1);
		345	SvREFCNT_dec (req->sv2);
		346	SvREFCNT_dec (req->callback);
		347
		348	Safefree (req);
		349	}
		350
		351	static void req_cancel_subs (aio_req grp)
		352	{
		353	aio_req sub;
		354
		355	if (grp->type != EIO_GROUP)
488	return 0;	356	return;
		357
		358	SvREFCNT_dec (grp->sv2);
		359	grp->sv2 = 0;
		360
		361	eio_grp_cancel (grp);
		362	}
		363
		364	#ifdef USE_SOCKETS_AS_HANDLES
		365	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		366	#else
		367	# define TO_SOCKET(x) (x)
		368	#endif
		369
		370	static void
		371	create_respipe (void)
		372	{
		373	int old_readfd = respipe [0];
		374
		375	if (respipe [1] >= 0)
		376	respipe_close (TO_SOCKET (respipe [1]));
		377
		378	#ifdef _WIN32
		379	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		380	#else
		381	if (pipe (respipe))
		382	#endif
		383	croak ("unable to initialize result pipe");
		384
		385	if (old_readfd >= 0)
		386	{
		387	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		388	croak ("unable to initialize result pipe(2)");
		389
		390	respipe_close (respipe [0]);
		391	respipe [0] = old_readfd;
		392	}
		393
		394	#ifdef _WIN32
		395	int arg = 1;
		396	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		397	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		398	#else
		399	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		400	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		401	#endif
		402	croak ("unable to initialize result pipe(3)");
		403
		404	respipe_osf [0] = TO_SOCKET (respipe [0]);
		405	respipe_osf [1] = TO_SOCKET (respipe [1]);
		406	}
		407
		408	static void poll_wait (void)
		409	{
		410	fd_set rfd;
		411
		412	while (eio_nreqs ())
		413	{
		414	int size;
		415
		416	X_LOCK (reslock);
		417	size = res_queue.size;
		418	X_UNLOCK (reslock);
		419
		420	if (size)
		421	return;
		422
		423	etp_maybe_start_thread ();
		424
		425	FD_ZERO (&rfd);
		426	FD_SET (respipe [0], &rfd);
		427
		428	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		429	}
		430	}
		431
		432	static int poll_cb (void)
		433	{
		434	for (;;)
		435	{
		436	int res = eio_poll ();
		437
		438	if (res > 0)
		439	croak (0);
		440
		441	if (!max_outstanding || max_outstanding > eio_nreqs ())
		442	return res;
		443
		444	poll_wait ();
		445	}
		446	}
		447
		448	static void atfork_child (void)
		449	{
		450	create_respipe ();
489	}	451	}
490		452
491	#define dREQ \	453	#define dREQ \
492	aio_req req; \	454	aio_req req; \
		455	int req_pri = next_pri; \
		456	next_pri = EIO_PRI_DEFAULT; \
493	\	457	\
494	if (SvOK (callback) && !SvROK (callback)) \	458	if (SvOK (callback) && !SvROK (callback)) \
495	croak ("clalback must be undef or of reference type"); \	459	croak ("callback must be undef or of reference type"); \
496	\	460	\
497	Newz (0, req, 1, aio_cb); \	461	Newz (0, req, 1, eio_req); \
498	if (!req) \	462	if (!req) \
499	croak ("out of memory during aio_req allocation"); \	463	croak ("out of memory during eio_req allocation"); \
500	\	464	\
501	req->callback = SvREFCNT_inc (callback);	465	req->callback = newSVsv (callback); \
		466	req->pri = req_pri
		467
		468	#define REQ_SEND \
		469	PUTBACK; \
		470	req_submit (req); \
		471	SPAGAIN; \
		472	\
		473	if (GIMME_V != G_VOID) \
		474	XPUSHs (req_sv (req, AIO_REQ_KLASS));
502		475
503	MODULE = IO::AIO PACKAGE = IO::AIO	476	MODULE = IO::AIO PACKAGE = IO::AIO
504		477
505	PROTOTYPES: ENABLE	478	PROTOTYPES: ENABLE
506		479
507	BOOT:	480	BOOT:
508	{	481	{
509	create_pipe ();	482	stash = gv_stashpv ("IO::AIO", 1);
510	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
511	}
512		483
		484	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		485	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		486	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		487	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		488	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		489	#ifndef _WIN32
		490	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		491	#endif
		492
		493	create_respipe ();
		494
		495	if (eio_init (want_poll, done_poll) < 0)
		496	croak ("IO::AIO: unable to initialise eio library");
		497
		498	/* atfork child called in fifo order, so before eio's handler */
		499	X_THREAD_ATFORK (0, 0, atfork_child);
		500	}
		501
513	void	502	void
514	min_parallel(nthreads)	503	max_poll_reqs (int nreqs)
515	int nthreads
516	PROTOTYPE: $	504	PROTOTYPE: $
		505	CODE:
		506	eio_set_max_poll_reqs (nreqs);
517		507
518	void	508	void
519	max_parallel(nthreads)	509	max_poll_time (double nseconds)
520	int nthreads
521	PROTOTYPE: $	510	PROTOTYPE: $
522
523	int
524	max_outstanding(nreqs)
525	int nreqs
526	PROTOTYPE: $
527	CODE:	511	CODE:
528	RETVAL = max_outstanding;	512	eio_set_max_poll_time (nseconds);
		513
		514	void
		515	min_parallel (int nthreads)
		516	PROTOTYPE: $
		517	CODE:
		518	eio_set_min_parallel (nthreads);
		519
		520	void
		521	max_parallel (int nthreads)
		522	PROTOTYPE: $
		523	CODE:
		524	eio_set_max_parallel (nthreads);
		525
		526	void
		527	max_idle (int nthreads)
		528	PROTOTYPE: $
		529	CODE:
		530	eio_set_max_idle (nthreads);
		531
		532	void
		533	max_outstanding (int maxreqs)
		534	PROTOTYPE: $
		535	CODE:
529	max_outstanding = nreqs;	536	max_outstanding = maxreqs;
530		537
531	void	538	void
532	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	539	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
533	SV * pathname
534	int flags
535	int mode
536	SV * callback
537	PROTOTYPE: $$$;$	540	PROTOTYPE: $$$;$
538	CODE:	541	PPCODE:
539	{	542	{
540	dREQ;	543	dREQ;
541		544
542	req->type = REQ_OPEN;	545	req->type = EIO_OPEN;
543	req->data = newSVsv (pathname);	546	req->sv1 = newSVsv (pathname);
544	req->dataptr = SvPVbyte_nolen (req->data);	547	req->ptr1 = SvPVbyte_nolen (req->sv1);
545	req->fd = flags;	548	req->int1 = flags;
546	req->mode = mode;	549	req->int2 = mode;
547		550
548	send_req (req);	551	REQ_SEND;
549	}	552	}
550		553
551	void	554	void
552	aio_close(fh,callback=&PL_sv_undef)	555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
553	SV * fh
554	SV * callback
555	PROTOTYPE: $;$	556	PROTOTYPE: $;$
556	ALIAS:	557	ALIAS:
557	aio_close = REQ_CLOSE
558	aio_fsync = REQ_FSYNC	558	aio_fsync = EIO_FSYNC
559	aio_fdatasync = REQ_FDATASYNC	559	aio_fdatasync = EIO_FDATASYNC
560	CODE:	560	PPCODE:
561	{	561	{
562	dREQ;	562	dREQ;
563		563
564	req->type = ix;	564	req->type = ix;
565	req->fh = newSVsv (fh);	565	req->sv1 = newSVsv (fh);
566	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
567		567
568	send_req (req);	568	REQ_SEND (req);
569	}	569	}
570		570
571	void	571	void
		572	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		573	PROTOTYPE: $;$
		574	PPCODE:
		575	{
		576	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		577	dREQ;
		578
		579	if (close_pipe < 0)
		580	{
		581	int pipefd [2];
		582
		583	if (pipe (pipefd) < 0
		584	|| close (pipefd [1]) < 0
		585	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		586	abort (); /*D*/
		587
		588	close_pipe = pipefd [0];
		589	}
		590
		591	req->type = EIO_DUP2;
		592	req->int1 = close_pipe;
		593	req->sv2 = newSVsv (fh);
		594	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		595
		596	REQ_SEND (req);
		597	}
		598
		599	void
572	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	600	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
573	SV * fh
574	UV offset
575	IV length
576	SV * data
577	IV dataoffset
578	SV * callback
579	ALIAS:	601	ALIAS:
580	aio_read = REQ_READ	602	aio_read = EIO_READ
581	aio_write = REQ_WRITE	603	aio_write = EIO_WRITE
582	PROTOTYPE: $$$$$;$	604	PROTOTYPE: $$$$$;$
583	CODE:	605	PPCODE:
584	{	606	{
585	aio_req req;
586	STRLEN svlen;	607	STRLEN svlen;
587	char *svptr = SvPVbyte (data, svlen);	608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
588		610
589	SvUPGRADE (data, SVt_PV);	611	SvUPGRADE (data, SVt_PV);
590	SvPOK_on (data);	612	SvPOK_on (data);
591		613
592	if (dataoffset < 0)	614	if (dataoffset < 0)
593	dataoffset += svlen;	615	dataoffset += svlen;
594		616
595	if (dataoffset < 0 || dataoffset > svlen)	617	if (dataoffset < 0 || dataoffset > svlen)
596	croak ("data offset outside of string");	618	croak ("dataoffset outside of data scalar");
597		619
598	if (ix == REQ_WRITE)	620	if (ix == EIO_WRITE)
599	{	621	{
600	/* write: check length and adjust. */	622	/* write: check length and adjust. */
601	if (length < 0 || length + dataoffset > svlen)	623	if (!SvOK (length) || len + dataoffset > svlen)
602	length = svlen - dataoffset;	624	len = svlen - dataoffset;
603	}	625	}
604	else	626	else
605	{	627	{
606	/* read: grow scalar as necessary */	628	/* read: grow scalar as necessary */
607	svptr = SvGROW (data, length + dataoffset);	629	svptr = SvGROW (data, len + dataoffset + 1);
608	}	630	}
609		631
610	if (length < 0)	632	if (len < 0)
611	croak ("length must not be negative");	633	croak ("length must not be negative");
612		634
613	{	635	{
614	dREQ;	636	dREQ;
615		637
616	req->type = ix;	638	req->type = ix;
617	req->fh = newSVsv (fh);	639	req->sv1 = newSVsv (fh);
618	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
619	: IoOFP (sv_2io (fh)));	641	: IoOFP (sv_2io (fh)));
		642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
620	req->offset = offset;	643	req->size = len;
621	req->length = length;
622	req->data = SvREFCNT_inc (data);	644	req->sv2 = SvREFCNT_inc (data);
623	req->dataptr = (char *)svptr + dataoffset;	645	req->ptr2 = (char *)svptr + dataoffset;
624	req->callback = SvREFCNT_inc (callback);	646	req->stroffset = dataoffset;
625		647
626	send_req (req);	648	if (!SvREADONLY (data))
		649	{
		650	SvREADONLY_on (data);
		651	req->flags |= FLAG_SV2_RO_OFF;
		652	}
		653
		654	REQ_SEND;
627	}	655	}
628	}	656	}
629		657
630	void	658	void
		659	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		660	PROTOTYPE: $$;$
		661	PPCODE:
		662	{
		663	SV *data;
		664	dREQ;
		665
		666	req->type = EIO_READLINK;
		667	req->sv1 = newSVsv (path);
		668	req->ptr1 = SvPVbyte_nolen (req->sv1);
		669
		670	REQ_SEND;
		671	}
		672
		673	void
		674	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		675	PROTOTYPE: $$$$;$
		676	PPCODE:
		677	{
		678	dREQ;
		679
		680	req->type = EIO_SENDFILE;
		681	req->sv1 = newSVsv (out_fh);
		682	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		683	req->sv2 = newSVsv (in_fh);
		684	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		685	req->offs = SvVAL64 (in_offset);
		686	req->size = length;
		687
		688	REQ_SEND;
		689	}
		690
		691	void
631	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	692	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
632	SV * fh
633	UV offset
634	IV length
635	SV * callback
636	PROTOTYPE: $$$;$	693	PROTOTYPE: $$$;$
637	CODE:	694	PPCODE:
638	{	695	{
639	dREQ;	696	dREQ;
640		697
641	req->type = REQ_READAHEAD;	698	req->type = EIO_READAHEAD;
642	req->fh = newSVsv (fh);	699	req->sv1 = newSVsv (fh);
643	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	700	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
644	req->offset = offset;	701	req->offs = SvVAL64 (offset);
645	req->length = length;	702	req->size = length;
646		703
647	send_req (req);	704	REQ_SEND;
648	}	705	}
649		706
650	void	707	void
651	aio_stat(fh_or_path,callback=&PL_sv_undef)	708	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
652	SV * fh_or_path
653	SV * callback
654	ALIAS:	709	ALIAS:
655	aio_stat = REQ_STAT	710	aio_stat = EIO_STAT
656	aio_lstat = REQ_LSTAT	711	aio_lstat = EIO_LSTAT
657	CODE:	712	PPCODE:
658	{	713	{
659	dREQ;	714	dREQ;
660		715
661	New (0, req->statdata, 1, Stat_t);	716	req->sv1 = newSVsv (fh_or_path);
662	if (!req->statdata)
663	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
664		717
665	if (SvPOK (fh_or_path))	718	if (SvPOK (req->sv1))
666	{	719	{
667	req->type = ix;	720	req->type = ix;
668	req->data = newSVsv (fh_or_path);
669	req->dataptr = SvPVbyte_nolen (req->data);	721	req->ptr1 = SvPVbyte_nolen (req->sv1);
670	}	722	}
671	else	723	else
672	{	724	{
673	req->type = REQ_FSTAT;	725	req->type = EIO_FSTAT;
674	req->fh = newSVsv (fh_or_path);
675	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	726	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		727	}
		728
		729	REQ_SEND;
		730	}
		731
		732	void
		733	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		734	PPCODE:
		735	{
		736	dREQ;
		737
		738	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		739	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		740	req->sv1 = newSVsv (fh_or_path);
		741
		742	if (SvPOK (req->sv1))
676	}	743	{
		744	req->type = EIO_UTIME;
		745	req->ptr1 = SvPVbyte_nolen (req->sv1);
		746	}
		747	else
		748	{
		749	req->type = EIO_FUTIME;
		750	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		751	}
677		752
678	send_req (req);	753	REQ_SEND;
679	}	754	}
680		755
681	void	756	void
		757	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		758	PPCODE:
		759	{
		760	dREQ;
		761
		762	req->sv1 = newSVsv (fh_or_path);
		763	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		764
		765	if (SvPOK (req->sv1))
		766	{
		767	req->type = EIO_TRUNCATE;
		768	req->ptr1 = SvPVbyte_nolen (req->sv1);
		769	}
		770	else
		771	{
		772	req->type = EIO_FTRUNCATE;
		773	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		774	}
		775
		776	REQ_SEND;
		777	}
		778
		779	void
		780	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		781	ALIAS:
		782	aio_chmod = EIO_CHMOD
		783	aio_mkdir = EIO_MKDIR
		784	PPCODE:
		785	{
		786	dREQ;
		787
		788	req->int2 = mode;
		789	req->sv1 = newSVsv (fh_or_path);
		790
		791	if (SvPOK (req->sv1))
		792	{
		793	req->type = ix;
		794	req->ptr1 = SvPVbyte_nolen (req->sv1);
		795	}
		796	else
		797	{
		798	req->type = EIO_FCHMOD;
		799	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		800	}
		801
		802	REQ_SEND;
		803	}
		804
		805	void
		806	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		807	PPCODE:
		808	{
		809	dREQ;
		810
		811	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		812	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		813	req->sv1 = newSVsv (fh_or_path);
		814
		815	if (SvPOK (req->sv1))
		816	{
		817	req->type = EIO_CHOWN;
		818	req->ptr1 = SvPVbyte_nolen (req->sv1);
		819	}
		820	else
		821	{
		822	req->type = EIO_FCHOWN;
		823	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		824	}
		825
		826	REQ_SEND;
		827	}
		828
		829	void
682	aio_unlink(pathname,callback=&PL_sv_undef)	830	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
683	SV * pathname
684	SV * callback
685	ALIAS:	831	ALIAS:
686	aio_unlink = REQ_UNLINK	832	aio_unlink = EIO_UNLINK
687	aio_rmdir = REQ_RMDIR	833	aio_rmdir = EIO_RMDIR
		834	aio_readdir = EIO_READDIR
688	CODE:	835	PPCODE:
689	{	836	{
690	dREQ;	837	dREQ;
691		838
692	req->type = ix;	839	req->type = ix;
693	req->data = newSVsv (pathname);	840	req->sv1 = newSVsv (pathname);
694	req->dataptr = SvPVbyte_nolen (req->data);	841	req->ptr1 = SvPVbyte_nolen (req->sv1);
		842
		843	REQ_SEND;
		844	}
		845
		846	void
		847	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		848	ALIAS:
		849	aio_link = EIO_LINK
		850	aio_symlink = EIO_SYMLINK
		851	aio_rename = EIO_RENAME
		852	PPCODE:
		853	{
		854	dREQ;
695		855
696	send_req (req);	856	req->type = ix;
697	}	857	req->sv1 = newSVsv (oldpath);
698		858	req->ptr1 = SvPVbyte_nolen (req->sv1);
699	void	859	req->sv2 = newSVsv (newpath);
700	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	860	req->ptr2 = SvPVbyte_nolen (req->sv2);
701	SV * oldpath
702	SV * newpath
703	SV * callback
704	CODE:
705	{
706	dREQ;
707		861
708	req->type = REQ_SYMLINK;	862	REQ_SEND;
709	req->fh = newSVsv (oldpath);	863	}
710	req->data2ptr = SvPVbyte_nolen (req->fh);	864
711	req->data = newSVsv (newpath);	865	void
712	req->dataptr = SvPVbyte_nolen (req->data);	866	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		867	PPCODE:
		868	{
		869	dREQ;
713		870
714	send_req (req);	871	req->type = EIO_MKNOD;
		872	req->sv1 = newSVsv (pathname);
		873	req->ptr1 = SvPVbyte_nolen (req->sv1);
		874	req->int2 = (mode_t)mode;
		875	req->offs = dev;
		876
		877	REQ_SEND;
715	}	878	}
716		879
717	void	880	void
		881	aio_busy (double delay, SV *callback=&PL_sv_undef)
		882	PPCODE:
		883	{
		884	dREQ;
		885
		886	req->type = EIO_BUSY;
		887	req->nv1 = delay < 0. ? 0. : delay;
		888
		889	REQ_SEND;
		890	}
		891
		892	void
		893	aio_group (SV *callback=&PL_sv_undef)
		894	PROTOTYPE: ;$
		895	PPCODE:
		896	{
		897	dREQ;
		898
		899	req->type = EIO_GROUP;
		900
		901	eio_submit (req);
		902	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		903	}
		904
		905	void
		906	aio_nop (SV *callback=&PL_sv_undef)
		907	ALIAS:
		908	aio_nop = EIO_NOP
		909	aio_sync = EIO_SYNC
		910	PPCODE:
		911	{
		912	dREQ;
		913
		914	req->type = ix;
		915
		916	REQ_SEND;
		917	}
		918
		919	int
		920	aioreq_pri (int pri = 0)
		921	PROTOTYPE: ;$
		922	CODE:
		923	RETVAL = next_pri;
		924	if (items > 0)
		925	{
		926	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		927	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		928	next_pri = pri;
		929	}
		930	OUTPUT:
		931	RETVAL
		932
		933	void
		934	aioreq_nice (int nice = 0)
		935	CODE:
		936	nice = next_pri - nice;
		937	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		938	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		939	next_pri = nice;
		940
		941	void
718	flush()	942	flush ()
719	PROTOTYPE:	943	PROTOTYPE:
720	CODE:	944	CODE:
721	while (nreqs)	945	while (eio_nreqs ())
722	{	946	{
723	poll_wait ();	947	poll_wait ();
724	poll_cb ();	948	poll_cb ();
725	}	949	}
726		950
727	void	951	int
728	poll()	952	poll()
729	PROTOTYPE:	953	PROTOTYPE:
730	CODE:	954	CODE:
731	if (nreqs)
732	{
733	poll_wait ();	955	poll_wait ();
734	poll_cb ();	956	RETVAL = poll_cb ();
735	}	957	OUTPUT:
		958	RETVAL
736		959
737	int	960	int
738	poll_fileno()	961	poll_fileno()
739	PROTOTYPE:	962	PROTOTYPE:
740	CODE:	963	CODE:
…		…
752		975
753	void	976	void
754	poll_wait()	977	poll_wait()
755	PROTOTYPE:	978	PROTOTYPE:
756	CODE:	979	CODE:
757	if (nreqs)
758	poll_wait ();	980	poll_wait ();
759		981
760	int	982	int
761	nreqs()	983	nreqs()
762	PROTOTYPE:	984	PROTOTYPE:
763	CODE:	985	CODE:
764	RETVAL = nreqs;	986	RETVAL = eio_nreqs ();
765	OUTPUT:	987	OUTPUT:
766	RETVAL	988	RETVAL
767		989
		990	int
		991	nready()
		992	PROTOTYPE:
		993	CODE:
		994	RETVAL = eio_nready ();
		995	OUTPUT:
		996	RETVAL
		997
		998	int
		999	npending()
		1000	PROTOTYPE:
		1001	CODE:
		1002	RETVAL = eio_npending ();
		1003	OUTPUT:
		1004	RETVAL
		1005
		1006	int
		1007	nthreads()
		1008	PROTOTYPE:
		1009	CODE:
		1010	RETVAL = eio_nthreads ();
		1011	OUTPUT:
		1012	RETVAL
		1013
		1014	void _on_next_submit (SV *cb)
		1015	CODE:
		1016	SvREFCNT_dec (on_next_submit);
		1017	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1018
		1019	PROTOTYPES: DISABLE
		1020
		1021	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1022
		1023	void
		1024	cancel (aio_req_ornot req)
		1025	CODE:
		1026	eio_cancel (req);
		1027
		1028	void
		1029	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1030	CODE:
		1031	SvREFCNT_dec (req->callback);
		1032	req->callback = newSVsv (callback);
		1033
		1034	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1035
		1036	void
		1037	add (aio_req grp, ...)
		1038	PPCODE:
		1039	{
		1040	int i;
		1041
		1042	if (grp->int1 == 2)
		1043	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1044
		1045	for (i = 1; i < items; ++i )
		1046	{
		1047	aio_req req;
		1048
		1049	if (GIMME_V != G_VOID)
		1050	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1051
		1052	req = SvAIO_REQ (ST (i));
		1053
		1054	if (req)
		1055	eio_grp_add (grp, req);
		1056	}
		1057	}
		1058
		1059	void
		1060	cancel_subs (aio_req_ornot req)
		1061	CODE:
		1062	req_cancel_subs (req);
		1063
		1064	void
		1065	result (aio_req grp, ...)
		1066	CODE:
		1067	{
		1068	int i;
		1069	AV *av;
		1070
		1071	grp->errorno = errno;
		1072
		1073	av = newAV ();
		1074
		1075	for (i = 1; i < items; ++i )
		1076	av_push (av, newSVsv (ST (i)));
		1077
		1078	SvREFCNT_dec (grp->sv1);
		1079	grp->sv1 = (SV *)av;
		1080	}
		1081
		1082	void
		1083	errno (aio_req grp, int errorno = errno)
		1084	CODE:
		1085	grp->errorno = errorno;
		1086
		1087	void
		1088	limit (aio_req grp, int limit)
		1089	CODE:
		1090	eio_grp_limit (grp, limit);
		1091
		1092	void
		1093	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1094	CODE:
		1095	{
		1096	SvREFCNT_dec (grp->sv2);
		1097	grp->sv2 = newSVsv (callback);
		1098
		1099	if (grp->int2 <= 0)
		1100	grp->int2 = 2;
		1101
		1102	eio_grp_limit (grp, grp->int2);
		1103	}
		1104

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