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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.25 by root, Wed Aug 17 03:16:56 2005 UTC vs.
Revision 1.125 by root, Thu Jun 19 09:05:43 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 */	124	static void req_cancel (aio_req req);
72		125
73	static void	126	static void want_poll (void)
74	poll_wait ()
75	{	127	{
76	if (nreqs && !ress)	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	{
		143	if (!req->self)
77	{	144	{
78	fd_set rfd;	145	req->self = (SV *)newHV ();
79	FD_ZERO(&rfd);	146	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80	FD_SET(respipe [0], &rfd);
81
82	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	147	}
84	}
85		148
86	static int	149	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
87	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)
88	{	200	{
89	dSP;	201	dSP;
90	int count = 0;
91	int do_croak = 0;
92	aio_req req, prv;
93		202
94	pthread_mutex_lock (&reslock);	203	if (req->flags & FLAG_SV2_RO_OFF)
		204	SvREADONLY_off (req->sv2);
95		205
96	{	206	if (!EIO_CANCELLED (req) && SvOK (req->callback))
97	/* read any signals sent by the worker threads */
98	char buf [32];
99	while (read (respipe [0], buf, 32) == 32)
100	;
101	}
102
103	req = ress;
104	ress = rese = 0;
105
106	pthread_mutex_unlock (&reslock);
107
108	while (req)
109	{	207	{
110	nreqs--;	208	ENTER;
		209	SAVETMPS;
		210	PUSHMARK (SP);
		211	EXTEND (SP, 1);
111		212
112	if (req->type == REQ_QUIT)	213	switch (req->type)
113	started--;
114	else
115	{	214	{
116	int errorno = errno;	215	case EIO_READDIR:
117	errno = req->errorno;
118
119	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset
121	+ req->result > 0 ? req->result : 0);
122
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->fh)
127	SvREFCNT_dec (req->fh);
128
129	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
130	{	216	{
131	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	217	SV *rv = &PL_sv_undef;
132	PL_laststatval = req->result;
133	PL_statcache = *(req->statdata);
134		218
135	Safefree (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);
136	}	239	}
		240	break;
137		241
138	ENTER;	242	case EIO_OPEN:
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141
142	if (req->type == REQ_OPEN)
143	{	243	{
144	/* convert fd to fh */	244	/* convert fd to fh */
145	SV *fh;	245	SV *fh = &PL_sv_undef;
146		246
147	PUTBACK;	247	if (req->result >= 0)
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	248	{
149	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);
150		256
151	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	);
152		264
		265	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		266	fh = (SV *)gv;
		267	}
		268
153	PUSHMARK (SP);	269	PUSHs (fh);
154	XPUSHs (sv_2mortal (fh));
155	}	270	}
156
157	if (SvOK (req->callback))
158	{
159	PUTBACK;
160	call_sv (req->callback, G_VOID | G_EVAL);
161	SPAGAIN;
162	}
163
164	do_croak = SvTRUE (ERRSV);
165
166	LEAVE;
167
168	if (req->callback)
169	SvREFCNT_dec (req->callback);
170
171	errno = errorno;
172	count++;
173	}
174
175	prv = req;
176	req = req->next;
177	Safefree (prv);
178
179	if (do_croak)
180	croak (0);
181	}
182
183	return count;
184	}
185
186	static void *aio_proc(void *arg);
187
188	static void
189	start_thread (void)
190	{
191	sigset_t fullsigset, oldsigset;
192	pthread_t tid;
193	pthread_attr_t attr;
194
195	pthread_attr_init (&attr);
196	pthread_attr_setstacksize (&attr, STACKSIZE);
197	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
198
199	sigfillset (&fullsigset);
200	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
201
202	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
203	started++;
204
205	sigprocmask (SIG_SETMASK, &oldsigset, 0);
206	}
207
208	static void
209	send_req (aio_req req)
210	{
211	nreqs++;
212
213	pthread_mutex_lock (&reqlock);
214
215	req->next = 0;
216
217	if (reqe)
218	{
219	reqe->next = req;
220	reqe = req;
221	}
222	else
223	reqe = reqs = req;
224
225	pthread_cond_signal (&reqwait);
226	pthread_mutex_unlock (&reqlock);
227
228	while (nreqs > max_outstanding)
229	{
230	poll_wait ();
231	poll_cb ();
232	}
233	}
234
235	static void
236	end_thread (void)
237	{
238	aio_req req;
239	New (0, req, 1, aio_cb);
240	req->type = REQ_QUIT;
241
242	send_req (req);
243	}
244
245
246	static void min_parallel (int nthreads)
247	{
248	while (nthreads > started)
249	start_thread ();
250	}
251
252	static void max_parallel (int nthreads)
253	{
254	int cur = started;
255	while (cur > nthreads)
256	{
257	end_thread ();
258	cur--;
259	}
260
261	while (started > nthreads)
262	{
263	poll_wait ();
264	poll_cb ();
265	}
266	}
267
268	static int fork_started;
269
270	static void atfork_prepare (void)
271	{
272	int nstarted;
273
274	for (;;) {
275	while (nreqs)
276	{
277	poll_wait ();
278	poll_cb ();
279	}
280
281	nstarted = started;
282	max_parallel (0);
283
284	pthread_mutex_lock (&reqlock);
285
286	if (!nreqs && !started)
287	break;
288
289	pthread_mutex_unlock (&reqlock);
290
291	min_parallel (fork_started);
292	}
293
294	pthread_mutex_lock (&frklock);
295	fork_started = nstarted;
296	pthread_mutex_lock (&reslock);
297
298	assert (!started);
299	assert (!nreqs);
300	assert (!reqs && !reqe);
301	assert (!ress && !rese);
302	}
303
304	static void atfork_parent (void)
305	{
306	pthread_mutex_unlock (&reslock);
307	pthread_mutex_unlock (&frklock);
308	pthread_mutex_unlock (&reqlock);
309
310	min_parallel (fork_started);
311	}
312
313	#define atfork_child atfork_parent
314
315	/*****************************************************************************/
316	/* work around various missing functions */
317
318	#if !HAVE_PREADWRITE
319	# define pread aio_pread
320	# define pwrite aio_pwrite
321
322	/*
323	* make our pread/pwrite safe against themselves, but not against
324	* normal read/write by using a mutex. slows down execution a lot,
325	* but that's your problem, not mine.
326	*/
327	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
328
329	static ssize_t
330	pread (int fd, void *buf, size_t count, off_t offset)
331	{
332	ssize_t res;
333	off_t ooffset;
334
335	pthread_mutex_lock (&iolock);
336	ooffset = lseek (fd, 0, SEEK_CUR);
337	lseek (fd, offset, SEEK_SET);
338	res = read (fd, buf, count);
339	lseek (fd, ooffset, SEEK_SET);
340	pthread_mutex_unlock (&iolock);
341
342	return res;
343	}
344
345	static ssize_t
346	pwrite (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 = write (fd, buf, count);
355	lseek (fd, offset, SEEK_SET);
356	pthread_mutex_unlock (&iolock);
357
358	return res;
359	}
360	#endif
361
362	#if !HAVE_FDATASYNC
363	# define fdatasync fsync
364	#endif
365
366	#if !HAVE_READAHEAD
367	# define readahead aio_readahead
368
369	static char readahead_buf[4096];
370
371	static ssize_t
372	readahead (int fd, off_t offset, size_t count)
373	{
374	while (count > 0)
375	{
376	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
377
378	pread (fd, readahead_buf, len, offset);
379	offset += len;
380	count -= len;
381	}
382
383	errno = 0;
384	}
385	#endif
386
387	/*****************************************************************************/
388
389	static void *
390	aio_proc (void *thr_arg)
391	{
392	aio_req req;
393	int type;
394
395	do
396	{
397	pthread_mutex_lock (&reqlock);
398
399	for (;;)
400	{
401	req = reqs;
402
403	if (reqs)
404	{
405	reqs = reqs->next;
406	if (!reqs) reqe = 0;
407	}
408
409	if (req)
410	break;	271	break;
411		272
412	pthread_cond_wait (&reqwait, &reqlock);	273	case EIO_GROUP:
413	}	274	req->int1 = 2; /* mark group as finished */
414		275
415	pthread_mutex_unlock (&reqlock);	276	if (req->sv1)
416
417	errno = 0; /* strictly unnecessary */
418
419	type = req->type;
420
421	switch (type)
422	{	277	{
423	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	278	int i;
424	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	279	AV *av = (AV *)req->sv1;
425		280
426	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	281	EXTEND (SP, AvFILL (av) + 1);
427		282	for (i = 0; i <= AvFILL (av); ++i)
428	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	283	PUSHs (*av_fetch (av, i, 0));
429	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	284	}
430	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
431
432	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
433	case REQ_CLOSE: req->result = close (req->fd); break;
434	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
435	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
436	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
437
438	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
439	case REQ_FSYNC: req->result = fsync (req->fd); break;
440
441	case REQ_QUIT:
442	break;	285	break;
443		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
444	default:	316	default:
445	req->result = ENOSYS;	317	PUSHs (sv_2mortal (newSViv (req->result)));
446	break;	318	break;
447	}	319	}
448		320
449	req->errorno = errno;	321	errno = req->errorno;
450		322
451	pthread_mutex_lock (&reslock);	323	PUTBACK;
		324	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		325	SPAGAIN;
452		326
453	req->next = 0;	327	FREETMPS;
		328	LEAVE;
454		329
455	if (rese)	330	PUTBACK;
456	{
457	rese->next = req;
458	rese = req;
459	}
460	else
461	{
462	rese = ress = req;
463
464	/* write a dummy byte to the pipe so fh becomes ready */
465	write (respipe [1], &respipe, 1);
466	}
467
468	pthread_mutex_unlock (&reslock);
469	}	331	}
470	while (type != REQ_QUIT);
471		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)
472	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 ();
473	}	451	}
474		452
475	#define dREQ \	453	#define dREQ \
476	aio_req req; \	454	aio_req req; \
		455	int req_pri = next_pri; \
		456	next_pri = EIO_PRI_DEFAULT; \
477	\	457	\
478	if (SvOK (callback) && !SvROK (callback)) \	458	if (SvOK (callback) && !SvROK (callback)) \
479	croak ("clalback must be undef or of reference type"); \	459	croak ("callback must be undef or of reference type"); \
480	\	460	\
481	Newz (0, req, 1, aio_cb); \	461	Newz (0, req, 1, eio_req); \
482	if (!req) \	462	if (!req) \
483	croak ("out of memory during aio_req allocation"); \	463	croak ("out of memory during eio_req allocation"); \
484	\	464	\
485	req->callback = SvREFCNT_inc (callback);	465	req->callback = newSVsv (callback); \
		466	req->pri = req_pri
		467
		468	#define REQ_SEND \
		469	req_submit (req); \
		470	\
		471	if (GIMME_V != G_VOID) \
		472	XPUSHs (req_sv (req, AIO_REQ_KLASS));
486		473
487	MODULE = IO::AIO PACKAGE = IO::AIO	474	MODULE = IO::AIO PACKAGE = IO::AIO
488		475
489	PROTOTYPES: ENABLE	476	PROTOTYPES: ENABLE
490		477
491	BOOT:	478	BOOT:
492	{	479	{
493	if (pipe (respipe))	480	stash = gv_stashpv ("IO::AIO", 1);
494	croak ("unable to initialize result pipe");
495		481
496	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	482	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
497	croak ("cannot set result pipe to nonblocking mode");	483	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		484	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		485	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		486	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		487	#ifndef _WIN32
		488	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		489	#endif
498		490
499	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	491	create_respipe ();
500	croak ("cannot set result pipe to nonblocking mode");
501		492
502	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	493	if (eio_init (want_poll, done_poll) < 0)
503	}	494	croak ("IO::AIO: unable to initialise eio library");
504		495
		496	/* atfork child called in fifo order, so before eio's handler */
		497	X_THREAD_ATFORK (0, 0, atfork_child);
		498	}
		499
505	void	500	void
506	min_parallel(nthreads)	501	max_poll_reqs (int nreqs)
507	int nthreads
508	PROTOTYPE: $	502	PROTOTYPE: $
		503	CODE:
		504	eio_set_max_poll_reqs (nreqs);
509		505
510	void	506	void
511	max_parallel(nthreads)	507	max_poll_time (double nseconds)
512	int nthreads
513	PROTOTYPE: $	508	PROTOTYPE: $
514
515	int
516	max_outstanding(nreqs)
517	int nreqs
518	PROTOTYPE: $
519	CODE:	509	CODE:
520	RETVAL = max_outstanding;	510	eio_set_max_poll_time (nseconds);
		511
		512	void
		513	min_parallel (int nthreads)
		514	PROTOTYPE: $
		515	CODE:
		516	eio_set_min_parallel (nthreads);
		517
		518	void
		519	max_parallel (int nthreads)
		520	PROTOTYPE: $
		521	CODE:
		522	eio_set_max_parallel (nthreads);
		523
		524	void
		525	max_idle (int nthreads)
		526	PROTOTYPE: $
		527	CODE:
		528	eio_set_max_idle (nthreads);
		529
		530	void
		531	max_outstanding (int maxreqs)
		532	PROTOTYPE: $
		533	CODE:
521	max_outstanding = nreqs;	534	max_outstanding = maxreqs;
522		535
523	void	536	void
524	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	537	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
525	SV * pathname
526	int flags
527	int mode
528	SV * callback
529	PROTOTYPE: $$$;$	538	PROTOTYPE: $$$;$
530	CODE:	539	PPCODE:
531	{	540	{
532	dREQ;	541	dREQ;
533		542
534	req->type = REQ_OPEN;	543	req->type = EIO_OPEN;
535	req->data = newSVsv (pathname);	544	req->sv1 = newSVsv (pathname);
536	req->dataptr = SvPVbyte_nolen (req->data);	545	req->ptr1 = SvPVbyte_nolen (req->sv1);
537	req->fd = flags;	546	req->int1 = flags;
538	req->mode = mode;	547	req->int2 = mode;
539		548
540	send_req (req);	549	REQ_SEND;
541	}	550	}
542		551
543	void	552	void
544	aio_close(fh,callback=&PL_sv_undef)	553	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
545	SV * fh
546	SV * callback
547	PROTOTYPE: $;$	554	PROTOTYPE: $;$
548	ALIAS:	555	ALIAS:
549	aio_close = REQ_CLOSE
550	aio_fsync = REQ_FSYNC	556	aio_fsync = EIO_FSYNC
551	aio_fdatasync = REQ_FDATASYNC	557	aio_fdatasync = EIO_FDATASYNC
552	CODE:	558	PPCODE:
553	{	559	{
554	dREQ;	560	dREQ;
555		561
556	req->type = ix;	562	req->type = ix;
557	req->fh = newSVsv (fh);	563	req->sv1 = newSVsv (fh);
558	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	564	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
559		565
560	send_req (req);	566	REQ_SEND (req);
561	}	567	}
562		568
563	void	569	void
		570	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		571	PROTOTYPE: $;$
		572	PPCODE:
		573	{
		574	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		575	dREQ;
		576
		577	if (close_pipe < 0)
		578	{
		579	int pipefd [2];
		580
		581	if (pipe (pipefd) < 0
		582	|| close (pipefd [1]) < 0
		583	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		584	abort (); /*D*/
		585
		586	close_pipe = pipefd [0];
		587	}
		588
		589	req->type = EIO_DUP2;
		590	req->int1 = close_pipe;
		591	req->sv2 = newSVsv (fh);
		592	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		593
		594	REQ_SEND (req);
		595	}
		596
		597	void
564	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	598	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
565	SV * fh
566	UV offset
567	IV length
568	SV * data
569	IV dataoffset
570	SV * callback
571	ALIAS:	599	ALIAS:
572	aio_read = REQ_READ	600	aio_read = EIO_READ
573	aio_write = REQ_WRITE	601	aio_write = EIO_WRITE
574	PROTOTYPE: $$$$$;$	602	PROTOTYPE: $$$$$;$
575	CODE:	603	PPCODE:
576	{	604	{
577	aio_req req;
578	STRLEN svlen;	605	STRLEN svlen;
579	char *svptr = SvPVbyte (data, svlen);	606	char *svptr = SvPVbyte (data, svlen);
		607	UV len = SvUV (length);
580		608
581	SvUPGRADE (data, SVt_PV);	609	SvUPGRADE (data, SVt_PV);
582	SvPOK_on (data);	610	SvPOK_on (data);
583		611
584	if (dataoffset < 0)	612	if (dataoffset < 0)
585	dataoffset += svlen;	613	dataoffset += svlen;
586		614
587	if (dataoffset < 0 || dataoffset > svlen)	615	if (dataoffset < 0 || dataoffset > svlen)
588	croak ("data offset outside of string");	616	croak ("dataoffset outside of data scalar");
589		617
590	if (ix == REQ_WRITE)	618	if (ix == EIO_WRITE)
591	{	619	{
592	/* write: check length and adjust. */	620	/* write: check length and adjust. */
593	if (length < 0 || length + dataoffset > svlen)	621	if (!SvOK (length) || len + dataoffset > svlen)
594	length = svlen - dataoffset;	622	len = svlen - dataoffset;
595	}	623	}
596	else	624	else
597	{	625	{
598	/* read: grow scalar as necessary */	626	/* read: grow scalar as necessary */
599	svptr = SvGROW (data, length + dataoffset);	627	svptr = SvGROW (data, len + dataoffset + 1);
600	}	628	}
601		629
602	if (length < 0)	630	if (len < 0)
603	croak ("length must not be negative");	631	croak ("length must not be negative");
604		632
605	{	633	{
606	dREQ;	634	dREQ;
607		635
608	req->type = ix;	636	req->type = ix;
609	req->fh = newSVsv (fh);	637	req->sv1 = newSVsv (fh);
610	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	638	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
611	: IoOFP (sv_2io (fh)));	639	: IoOFP (sv_2io (fh)));
		640	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
612	req->offset = offset;	641	req->size = len;
613	req->length = length;
614	req->data = SvREFCNT_inc (data);	642	req->sv2 = SvREFCNT_inc (data);
615	req->dataptr = (char *)svptr + dataoffset;	643	req->ptr2 = (char *)svptr + dataoffset;
616	req->callback = SvREFCNT_inc (callback);	644	req->stroffset = dataoffset;
617		645
618	send_req (req);	646	if (!SvREADONLY (data))
		647	{
		648	SvREADONLY_on (data);
		649	req->flags |= FLAG_SV2_RO_OFF;
		650	}
		651
		652	REQ_SEND;
619	}	653	}
620	}	654	}
621		655
622	void	656	void
		657	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		658	PROTOTYPE: $$;$
		659	PPCODE:
		660	{
		661	SV *data;
		662	dREQ;
		663
		664	req->type = EIO_READLINK;
		665	req->sv1 = newSVsv (path);
		666	req->ptr1 = SvPVbyte_nolen (req->sv1);
		667
		668	REQ_SEND;
		669	}
		670
		671	void
		672	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		673	PROTOTYPE: $$$$;$
		674	PPCODE:
		675	{
		676	dREQ;
		677
		678	req->type = EIO_SENDFILE;
		679	req->sv1 = newSVsv (out_fh);
		680	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		681	req->sv2 = newSVsv (in_fh);
		682	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		683	req->offs = SvVAL64 (in_offset);
		684	req->size = length;
		685
		686	REQ_SEND;
		687	}
		688
		689	void
623	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	690	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
624	SV * fh
625	UV offset
626	IV length
627	SV * callback
628	PROTOTYPE: $$$;$	691	PROTOTYPE: $$$;$
629	CODE:	692	PPCODE:
630	{	693	{
631	dREQ;	694	dREQ;
632		695
633	req->type = REQ_READAHEAD;	696	req->type = EIO_READAHEAD;
634	req->fh = newSVsv (fh);	697	req->sv1 = newSVsv (fh);
635	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	698	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
636	req->offset = offset;	699	req->offs = SvVAL64 (offset);
637	req->length = length;	700	req->size = length;
638		701
639	send_req (req);	702	REQ_SEND;
640	}	703	}
641		704
642	void	705	void
643	aio_stat(fh_or_path,callback=&PL_sv_undef)	706	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
644	SV * fh_or_path
645	SV * callback
646	ALIAS:	707	ALIAS:
647	aio_stat = REQ_STAT	708	aio_stat = EIO_STAT
648	aio_lstat = REQ_LSTAT	709	aio_lstat = EIO_LSTAT
649	CODE:	710	PPCODE:
650	{	711	{
651	dREQ;	712	dREQ;
652		713
653	New (0, req->statdata, 1, Stat_t);	714	req->sv1 = newSVsv (fh_or_path);
654	if (!req->statdata)
655	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
656		715
657	if (SvPOK (fh_or_path))	716	if (SvPOK (req->sv1))
658	{	717	{
659	req->type = ix;	718	req->type = ix;
660	req->data = newSVsv (fh_or_path);
661	req->dataptr = SvPVbyte_nolen (req->data);	719	req->ptr1 = SvPVbyte_nolen (req->sv1);
662	}	720	}
663	else	721	else
664	{	722	{
665	req->type = REQ_FSTAT;	723	req->type = EIO_FSTAT;
666	req->fh = newSVsv (fh_or_path);
667	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	724	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		725	}
		726
		727	REQ_SEND;
		728	}
		729
		730	void
		731	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		732	PPCODE:
		733	{
		734	dREQ;
		735
		736	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		737	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		738	req->sv1 = newSVsv (fh_or_path);
		739
		740	if (SvPOK (req->sv1))
668	}	741	{
		742	req->type = EIO_UTIME;
		743	req->ptr1 = SvPVbyte_nolen (req->sv1);
		744	}
		745	else
		746	{
		747	req->type = EIO_FUTIME;
		748	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		749	}
669		750
670	send_req (req);	751	REQ_SEND;
671	}	752	}
672		753
673	void	754	void
		755	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		756	PPCODE:
		757	{
		758	dREQ;
		759
		760	req->sv1 = newSVsv (fh_or_path);
		761	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		762
		763	if (SvPOK (req->sv1))
		764	{
		765	req->type = EIO_TRUNCATE;
		766	req->ptr1 = SvPVbyte_nolen (req->sv1);
		767	}
		768	else
		769	{
		770	req->type = EIO_FTRUNCATE;
		771	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		772	}
		773
		774	REQ_SEND;
		775	}
		776
		777	void
		778	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		779	ALIAS:
		780	aio_chmod = EIO_CHMOD
		781	aio_mkdir = EIO_MKDIR
		782	PPCODE:
		783	{
		784	dREQ;
		785
		786	req->int2 = mode;
		787	req->sv1 = newSVsv (fh_or_path);
		788
		789	if (SvPOK (req->sv1))
		790	{
		791	req->type = ix;
		792	req->ptr1 = SvPVbyte_nolen (req->sv1);
		793	}
		794	else
		795	{
		796	req->type = EIO_FCHMOD;
		797	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		798	}
		799
		800	REQ_SEND;
		801	}
		802
		803	void
		804	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		805	PPCODE:
		806	{
		807	dREQ;
		808
		809	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		810	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		811	req->sv1 = newSVsv (fh_or_path);
		812
		813	if (SvPOK (req->sv1))
		814	{
		815	req->type = EIO_CHOWN;
		816	req->ptr1 = SvPVbyte_nolen (req->sv1);
		817	}
		818	else
		819	{
		820	req->type = EIO_FCHOWN;
		821	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		822	}
		823
		824	REQ_SEND;
		825	}
		826
		827	void
674	aio_unlink(pathname,callback=&PL_sv_undef)	828	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
675	SV * pathname
676	SV * callback
677	ALIAS:	829	ALIAS:
678	aio_unlink = REQ_UNLINK	830	aio_unlink = EIO_UNLINK
679	aio_rmdir = REQ_RMDIR	831	aio_rmdir = EIO_RMDIR
		832	aio_readdir = EIO_READDIR
680	CODE:	833	PPCODE:
681	{	834	{
682	dREQ;	835	dREQ;
683		836
684	req->type = ix;	837	req->type = ix;
685	req->data = newSVsv (pathname);	838	req->sv1 = newSVsv (pathname);
686	req->dataptr = SvPVbyte_nolen (req->data);	839	req->ptr1 = SvPVbyte_nolen (req->sv1);
		840
		841	REQ_SEND;
		842	}
		843
		844	void
		845	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		846	ALIAS:
		847	aio_link = EIO_LINK
		848	aio_symlink = EIO_SYMLINK
		849	aio_rename = EIO_RENAME
		850	PPCODE:
		851	{
		852	dREQ;
687		853
688	send_req (req);	854	req->type = ix;
689	}	855	req->sv1 = newSVsv (oldpath);
690		856	req->ptr1 = SvPVbyte_nolen (req->sv1);
691	void	857	req->sv2 = newSVsv (newpath);
692	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	858	req->ptr2 = SvPVbyte_nolen (req->sv2);
693	SV * oldpath
694	SV * newpath
695	SV * callback
696	CODE:
697	{
698	dREQ;
699		859
700	req->type = REQ_SYMLINK;	860	REQ_SEND;
701	req->fh = newSVsv (oldpath);	861	}
702	req->data2ptr = SvPVbyte_nolen (req->fh);	862
703	req->data = newSVsv (newpath);	863	void
704	req->dataptr = SvPVbyte_nolen (req->data);	864	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		865	PPCODE:
		866	{
		867	dREQ;
705		868
706	send_req (req);	869	req->type = EIO_MKNOD;
		870	req->sv1 = newSVsv (pathname);
		871	req->ptr1 = SvPVbyte_nolen (req->sv1);
		872	req->int2 = (mode_t)mode;
		873	req->offs = dev;
		874
		875	REQ_SEND;
707	}	876	}
708		877
709	void	878	void
		879	aio_busy (double delay, SV *callback=&PL_sv_undef)
		880	PPCODE:
		881	{
		882	dREQ;
		883
		884	req->type = EIO_BUSY;
		885	req->nv1 = delay < 0. ? 0. : delay;
		886
		887	REQ_SEND;
		888	}
		889
		890	void
		891	aio_group (SV *callback=&PL_sv_undef)
		892	PROTOTYPE: ;$
		893	PPCODE:
		894	{
		895	dREQ;
		896
		897	req->type = EIO_GROUP;
		898
		899	eio_submit (req);
		900	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		901	}
		902
		903	void
		904	aio_nop (SV *callback=&PL_sv_undef)
		905	ALIAS:
		906	aio_nop = EIO_NOP
		907	aio_sync = EIO_SYNC
		908	PPCODE:
		909	{
		910	dREQ;
		911
		912	req->type = ix;
		913
		914	REQ_SEND;
		915	}
		916
		917	int
		918	aioreq_pri (int pri = 0)
		919	PROTOTYPE: ;$
		920	CODE:
		921	RETVAL = next_pri;
		922	if (items > 0)
		923	{
		924	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		925	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		926	next_pri = pri;
		927	}
		928	OUTPUT:
		929	RETVAL
		930
		931	void
		932	aioreq_nice (int nice = 0)
		933	CODE:
		934	nice = next_pri - nice;
		935	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		936	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		937	next_pri = nice;
		938
		939	void
710	flush()	940	flush ()
711	PROTOTYPE:	941	PROTOTYPE:
712	CODE:	942	CODE:
713	while (nreqs)	943	while (eio_nreqs ())
714	{	944	{
715	poll_wait ();	945	poll_wait ();
716	poll_cb ();	946	poll_cb ();
717	}	947	}
718		948
719	void	949	int
720	poll()	950	poll()
721	PROTOTYPE:	951	PROTOTYPE:
722	CODE:	952	CODE:
723	if (nreqs)
724	{
725	poll_wait ();	953	poll_wait ();
726	poll_cb ();	954	RETVAL = poll_cb ();
727	}	955	OUTPUT:
		956	RETVAL
728		957
729	int	958	int
730	poll_fileno()	959	poll_fileno()
731	PROTOTYPE:	960	PROTOTYPE:
732	CODE:	961	CODE:
…		…
744		973
745	void	974	void
746	poll_wait()	975	poll_wait()
747	PROTOTYPE:	976	PROTOTYPE:
748	CODE:	977	CODE:
749	if (nreqs)
750	poll_wait ();	978	poll_wait ();
751		979
752	int	980	int
753	nreqs()	981	nreqs()
754	PROTOTYPE:	982	PROTOTYPE:
755	CODE:	983	CODE:
756	RETVAL = nreqs;	984	RETVAL = eio_nreqs ();
757	OUTPUT:	985	OUTPUT:
758	RETVAL	986	RETVAL
759		987
		988	int
		989	nready()
		990	PROTOTYPE:
		991	CODE:
		992	RETVAL = eio_nready ();
		993	OUTPUT:
		994	RETVAL
		995
		996	int
		997	npending()
		998	PROTOTYPE:
		999	CODE:
		1000	RETVAL = eio_npending ();
		1001	OUTPUT:
		1002	RETVAL
		1003
		1004	int
		1005	nthreads()
		1006	PROTOTYPE:
		1007	CODE:
		1008	RETVAL = eio_nthreads ();
		1009	OUTPUT:
		1010	RETVAL
		1011
		1012	void _on_next_submit (SV *cb)
		1013	CODE:
		1014	SvREFCNT_dec (on_next_submit);
		1015	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1016
		1017	PROTOTYPES: DISABLE
		1018
		1019	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1020
		1021	void
		1022	cancel (aio_req_ornot req)
		1023	CODE:
		1024	eio_cancel (req);
		1025
		1026	void
		1027	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1028	CODE:
		1029	SvREFCNT_dec (req->callback);
		1030	req->callback = newSVsv (callback);
		1031
		1032	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1033
		1034	void
		1035	add (aio_req grp, ...)
		1036	PPCODE:
		1037	{
		1038	int i;
		1039
		1040	if (grp->int1 == 2)
		1041	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1042
		1043	for (i = 1; i < items; ++i )
		1044	{
		1045	aio_req req;
		1046
		1047	if (GIMME_V != G_VOID)
		1048	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1049
		1050	req = SvAIO_REQ (ST (i));
		1051
		1052	if (req)
		1053	eio_grp_add (grp, req);
		1054	}
		1055	}
		1056
		1057	void
		1058	cancel_subs (aio_req_ornot req)
		1059	CODE:
		1060	req_cancel_subs (req);
		1061
		1062	void
		1063	result (aio_req grp, ...)
		1064	CODE:
		1065	{
		1066	int i;
		1067	AV *av;
		1068
		1069	grp->errorno = errno;
		1070
		1071	av = newAV ();
		1072
		1073	for (i = 1; i < items; ++i )
		1074	av_push (av, newSVsv (ST (i)));
		1075
		1076	SvREFCNT_dec (grp->sv1);
		1077	grp->sv1 = (SV *)av;
		1078	}
		1079
		1080	void
		1081	errno (aio_req grp, int errorno = errno)
		1082	CODE:
		1083	grp->errorno = errorno;
		1084
		1085	void
		1086	limit (aio_req grp, int limit)
		1087	CODE:
		1088	eio_grp_limit (grp, limit);
		1089
		1090	void
		1091	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1092	CODE:
		1093	{
		1094	SvREFCNT_dec (grp->sv2);
		1095	grp->sv2 = newSVsv (callback);
		1096
		1097	if (grp->int2 <= 0)
		1098	grp->int2 = 2;
		1099
		1100	eio_grp_limit (grp, grp->int2);
		1101	}
		1102

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