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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.23 by root, Tue Aug 16 23:33:34 2005 UTC vs.
Revision 1.130 by root, Thu Oct 2 11:35:03 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	/*****************************************************************************/
		86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
		91	#endif
		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	static HV *stash;
		99	typedef SV SV8; /* byte-sv, used for argument-checking */
		100
		101	#define AIO_REQ_KLASS "IO::AIO::REQ"
		102	#define AIO_GRP_KLASS "IO::AIO::GRP"
		103
		104	#define EIO_REQ_MEMBERS \
		105	SV *callback; \
		106	SV *sv1, *sv2; \
		107	STRLEN stroffset; \
		108	SV *self;
		109
		110	#define EIO_NO_WRAPPERS 1
		111
		112	#include "libeio/eio.h"
		113
		114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void aio_grp_feed (eio_req *grp);
		117	#define EIO_FEED(req) aio_grp_feed (req)
		118	static void req_destroy (eio_req *grp);
		119	#define EIO_DESTROY(req) req_destroy (req)
		120
30	enum {	121	enum {
31	REQ_QUIT,	122	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	};	123	};
39		124
40	typedef struct aio_cb {	125	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		126
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;	127	typedef eio_req *aio_req;
		128	typedef eio_req *aio_req_ornot;
59		129
60	static int started;	130	static SV *on_next_submit;
61	static volatile int nreqs;	131	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	132	static int max_outstanding;
63	static int respipe [2];
64		133
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	134	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		135
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	136	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */	137	static void req_cancel (aio_req req);
72		138
73	static void	139	static void want_poll (void)
74	poll_wait ()
75	{	140	{
76	if (nreqs && !ress)	141	/* write a dummy byte to the pipe so fh becomes ready */
		142	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		143	}
		144
		145	static void done_poll (void)
		146	{
		147	/* read any signals sent by the worker threads */
		148	char buf [4];
		149	while (respipe_read (respipe [0], buf, 4) == 4)
		150	;
		151	}
		152
		153	/* must be called at most once */
		154	static SV *req_sv (aio_req req, const char *klass)
		155	{
		156	if (!req->self)
77	{	157	{
78	fd_set rfd;	158	req->self = (SV *)newHV ();
79	FD_ZERO(&rfd);	159	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	}	160	}
84	}
85		161
86	static int	162	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
87	poll_cb ()	163	}
		164
		165	static aio_req SvAIO_REQ (SV *sv)
		166	{
		167	MAGIC *mg;
		168
		169	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		170	croak ("object of class " AIO_REQ_KLASS " expected");
		171
		172	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		173
		174	return mg ? (aio_req)mg->mg_ptr : 0;
		175	}
		176
		177	static void aio_grp_feed (aio_req grp)
		178	{
		179	if (grp->sv2 && SvOK (grp->sv2))
		180	{
		181	dSP;
		182
		183	ENTER;
		184	SAVETMPS;
		185	PUSHMARK (SP);
		186	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		187	PUTBACK;
		188	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		189	SPAGAIN;
		190	FREETMPS;
		191	LEAVE;
		192	}
		193	}
		194
		195	static void req_submit (eio_req *req)
		196	{
		197	eio_submit (req);
		198
		199	if (expect_false (on_next_submit))
		200	{
		201	dSP;
		202	SV *cb = sv_2mortal (on_next_submit);
		203
		204	on_next_submit = 0;
		205
		206	PUSHMARK (SP);
		207	PUTBACK;
		208	call_sv (cb, G_DISCARD | G_EVAL);
		209	}
		210	}
		211
		212	static int req_invoke (eio_req *req)
88	{	213	{
89	dSP;	214	dSP;
90	int count = 0;
91	aio_req req, prv;
92		215
93	pthread_mutex_lock (&reslock);	216	if (req->flags & FLAG_SV2_RO_OFF)
		217	SvREADONLY_off (req->sv2);
94		218
95	{	219	if (!EIO_CANCELLED (req) && req->callback)
96	/* read any signals sent by the worker threads */
97	char buf [32];
98	while (read (respipe [0], buf, 32) == 32)
99	;
100	}
101
102	req = ress;
103	ress = rese = 0;
104
105	pthread_mutex_unlock (&reslock);
106
107	while (req)
108	{	220	{
109	nreqs--;	221	ENTER;
		222	SAVETMPS;
		223	PUSHMARK (SP);
		224	EXTEND (SP, 1);
110		225
111	if (req->type == REQ_QUIT)	226	switch (req->type)
112	started--;
113	else
114	{	227	{
115	int errorno = errno;	228	case EIO_READDIR:
116	errno = req->errorno;
117
118	if (req->type == REQ_READ)
119	SvCUR_set (req->data, req->dataoffset
120	+ req->result > 0 ? req->result : 0);
121
122	if (req->data)
123	SvREFCNT_dec (req->data);
124
125	if (req->fh)
126	SvREFCNT_dec (req->fh);
127
128	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
129	{	229	{
130	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	230	SV *rv = &PL_sv_undef;
131	PL_laststatval = req->result;
132	PL_statcache = *(req->statdata);
133		231
134	Safefree (req->statdata);	232	if (req->result >= 0)
		233	{
		234	int i;
		235	char *buf = req->ptr2;
		236	AV *av = newAV ();
		237
		238	av_extend (av, req->result - 1);
		239
		240	for (i = 0; i < req->result; ++i)
		241	{
		242	SV *sv = newSVpv (buf, 0);
		243
		244	av_store (av, i, sv);
		245	buf += SvCUR (sv) + 1;
		246	}
		247
		248	rv = sv_2mortal (newRV_noinc ((SV *)av));
		249	}
		250
		251	PUSHs (rv);
135	}	252	}
		253	break;
136		254
137	ENTER;	255	case EIO_OPEN:
138	PUSHMARK (SP);
139	XPUSHs (sv_2mortal (newSViv (req->result)));
140
141	if (req->type == REQ_OPEN)
142	{	256	{
143	/* convert fd to fh */	257	/* convert fd to fh */
144	SV *fh;	258	SV *fh = &PL_sv_undef;
145		259
146	PUTBACK;	260	if (req->result >= 0)
147	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	261	{
148	SPAGAIN;	262	GV *gv = (GV *)sv_newmortal ();
		263	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		264	char sym [64];
		265	int symlen;
		266
		267	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		268	gv_init (gv, stash, sym, symlen, 0);
149		269
150	fh = SvREFCNT_inc (POPs);	270	symlen = snprintf (
		271	sym,
		272	sizeof (sym),
		273	"%s&=%d",
		274	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		275	req->result
		276	);
151		277
		278	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		279	fh = (SV *)gv;
		280	}
		281
152	PUSHMARK (SP);	282	PUSHs (fh);
153	XPUSHs (sv_2mortal (fh));
154	}	283	}
155
156	if (SvOK (req->callback))
157	{
158	PUTBACK;
159	call_sv (req->callback, G_VOID | G_EVAL);
160	SPAGAIN;
161	}
162
163	LEAVE;
164
165	if (req->callback)
166	SvREFCNT_dec (req->callback);
167
168	errno = errorno;
169	count++;
170	}
171
172	prv = req;
173	req = req->next;
174	Safefree (prv);
175
176	/* TODO: croak on errors? */
177	}
178
179	return count;
180	}
181
182	static void *aio_proc(void *arg);
183
184	static void
185	start_thread (void)
186	{
187	sigset_t fullsigset, oldsigset;
188	pthread_t tid;
189	pthread_attr_t attr;
190
191	pthread_attr_init (&attr);
192	pthread_attr_setstacksize (&attr, STACKSIZE);
193	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
194
195	sigfillset (&fullsigset);
196	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
197
198	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
199	started++;
200
201	sigprocmask (SIG_SETMASK, &oldsigset, 0);
202	}
203
204	static void
205	send_req (aio_req req)
206	{
207	nreqs++;
208
209	pthread_mutex_lock (&reqlock);
210
211	req->next = 0;
212
213	if (reqe)
214	{
215	reqe->next = req;
216	reqe = req;
217	}
218	else
219	reqe = reqs = req;
220
221	pthread_cond_signal (&reqwait);
222	pthread_mutex_unlock (&reqlock);
223
224	while (nreqs > max_outstanding)
225	{
226	poll_wait ();
227	poll_cb ();
228	}
229	}
230
231	static void
232	end_thread (void)
233	{
234	aio_req req;
235	New (0, req, 1, aio_cb);
236	req->type = REQ_QUIT;
237
238	send_req (req);
239	}
240
241
242	static void min_parallel (int nthreads)
243	{
244	while (nthreads > started)
245	start_thread ();
246	}
247
248	static void max_parallel (int nthreads)
249	{
250	int cur = started;
251	while (cur > nthreads)
252	{
253	end_thread ();
254	cur--;
255	}
256
257	while (started > nthreads)
258	{
259	poll_wait ();
260	poll_cb ();
261	}
262	}
263
264	static int fork_started;
265
266	static void atfork_prepare (void)
267	{
268	pthread_mutex_lock (&frklock);
269
270	fork_started = started;
271
272	for (;;) {
273	while (nreqs)
274	{
275	poll_wait ();
276	poll_cb ();
277	}
278
279	max_parallel (0);
280
281	pthread_mutex_lock (&reqlock);
282
283	if (!nreqs && !started)
284	break;
285
286	pthread_mutex_unlock (&reqlock);
287
288	min_parallel (fork_started);
289	}
290
291	pthread_mutex_lock (&reslock);
292
293	assert (!started);
294	assert (!nreqs);
295	assert (!reqs && !reqe);
296	assert (!ress && !rese);
297	}
298
299	static void atfork_parent (void)
300	{
301	pthread_mutex_unlock (&reslock);
302	min_parallel (fork_started);
303	pthread_mutex_unlock (&reqlock);
304	pthread_mutex_unlock (&frklock);
305	}
306
307	static void atfork_child (void)
308	{
309	reqs = reqe = 0;
310
311	atfork_parent ();
312	}
313
314	/*****************************************************************************/
315	/* work around various missing functions */
316
317	#if !HAVE_PREADWRITE
318	# define pread aio_pread
319	# define pwrite aio_pwrite
320
321	/*
322	* make our pread/pwrite safe against themselves, but not against
323	* normal read/write by using a mutex. slows down execution a lot,
324	* but that's your problem, not mine.
325	*/
326	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
327
328	static ssize_t
329	pread (int fd, void *buf, size_t count, off_t offset)
330	{
331	ssize_t res;
332	off_t ooffset;
333
334	pthread_mutex_lock (&iolock);
335	ooffset = lseek (fd, 0, SEEK_CUR);
336	lseek (fd, offset, SEEK_SET);
337	res = read (fd, buf, count);
338	lseek (fd, ooffset, SEEK_SET);
339	pthread_mutex_unlock (&iolock);
340
341	return res;
342	}
343
344	static ssize_t
345	pwrite (int fd, void *buf, size_t count, off_t offset)
346	{
347	ssize_t res;
348	off_t ooffset;
349
350	pthread_mutex_lock (&iolock);
351	ooffset = lseek (fd, 0, SEEK_CUR);
352	lseek (fd, offset, SEEK_SET);
353	res = write (fd, buf, count);
354	lseek (fd, offset, SEEK_SET);
355	pthread_mutex_unlock (&iolock);
356
357	return res;
358	}
359	#endif
360
361	#if !HAVE_FDATASYNC
362	# define fdatasync fsync
363	#endif
364
365	#if !HAVE_READAHEAD
366	# define readahead aio_readahead
367
368	static char readahead_buf[4096];
369
370	static ssize_t
371	readahead (int fd, off_t offset, size_t count)
372	{
373	while (count > 0)
374	{
375	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
376
377	pread (fd, readahead_buf, len, offset);
378	offset += len;
379	count -= len;
380	}
381
382	errno = 0;
383	}
384	#endif
385
386	/*****************************************************************************/
387
388	static void *
389	aio_proc (void *thr_arg)
390	{
391	aio_req req;
392	int type;
393
394	do
395	{
396	pthread_mutex_lock (&reqlock);
397
398	for (;;)
399	{
400	req = reqs;
401
402	if (reqs)
403	{
404	reqs = reqs->next;
405	if (!reqs) reqe = 0;
406	}
407
408	if (req)
409	break;	284	break;
410		285
411	pthread_cond_wait (&reqwait, &reqlock);	286	case EIO_GROUP:
412	}	287	req->int1 = 2; /* mark group as finished */
413		288
414	pthread_mutex_unlock (&reqlock);	289	if (req->sv1)
415
416	errno = 0; /* strictly unnecessary */
417
418	type = req->type;
419
420	switch (type)
421	{	290	{
422	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	291	int i;
423	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	292	AV *av = (AV *)req->sv1;
424		293
425	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	294	EXTEND (SP, AvFILL (av) + 1);
426		295	for (i = 0; i <= AvFILL (av); ++i)
427	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	296	PUSHs (*av_fetch (av, i, 0));
428	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	297	}
429	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430
431	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
432	case REQ_CLOSE: req->result = close (req->fd); break;
433	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
435	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
436
437	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438	case REQ_FSYNC: req->result = fsync (req->fd); break;
439
440	case REQ_QUIT:
441	break;	298	break;
442		299
		300	case EIO_NOP:
		301	case EIO_BUSY:
		302	break;
		303
		304	case EIO_READLINK:
		305	if (req->result > 0)
		306	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		307	break;
		308
		309	case EIO_STAT:
		310	case EIO_LSTAT:
		311	case EIO_FSTAT:
		312	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		313	PL_laststatval = req->result;
		314	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		315	PUSHs (sv_2mortal (newSViv (req->result)));
		316	break;
		317
		318	case EIO_READ:
		319	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		320	*SvEND (req->sv2) = 0;
		321	PUSHs (sv_2mortal (newSViv (req->result)));
		322	break;
		323
		324	case EIO_DUP2:
		325	if (req->result > 0)
		326	req->result = 0;
		327	/* FALLTHROUGH */
		328
443	default:	329	default:
444	req->result = ENOSYS;	330	PUSHs (sv_2mortal (newSViv (req->result)));
445	break;	331	break;
446	}	332	}
447		333
448	req->errorno = errno;	334	errno = req->errorno;
449		335
450	pthread_mutex_lock (&reslock);	336	PUTBACK;
		337	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		338	SPAGAIN;
451		339
452	req->next = 0;	340	FREETMPS;
		341	LEAVE;
453		342
454	if (rese)	343	PUTBACK;
455	{
456	rese->next = req;
457	rese = req;
458	}
459	else
460	{
461	rese = ress = req;
462
463	/* write a dummy byte to the pipe so fh becomes ready */
464	write (respipe [1], &respipe, 1);
465	}
466
467	pthread_mutex_unlock (&reslock);
468	}	344	}
469	while (type != REQ_QUIT);
470		345
		346	return !!SvTRUE (ERRSV);
		347	}
		348
		349	static void req_destroy (aio_req req)
		350	{
		351	if (req->self)
		352	{
		353	sv_unmagic (req->self, PERL_MAGIC_ext);
		354	SvREFCNT_dec (req->self);
		355	}
		356
		357	SvREFCNT_dec (req->sv1);
		358	SvREFCNT_dec (req->sv2);
		359	SvREFCNT_dec (req->callback);
		360
		361	Safefree (req);
		362	}
		363
		364	static void req_cancel_subs (aio_req grp)
		365	{
		366	aio_req sub;
		367
		368	if (grp->type != EIO_GROUP)
		369	return;
		370
		371	SvREFCNT_dec (grp->sv2);
		372	grp->sv2 = 0;
		373
		374	eio_grp_cancel (grp);
		375	}
		376
		377	#ifdef USE_SOCKETS_AS_HANDLES
		378	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		379	#else
		380	# define TO_SOCKET(x) (x)
		381	#endif
		382
		383	static void
		384	create_respipe (void)
		385	{
		386	int old_readfd = respipe [0];
		387
		388	if (respipe [1] >= 0)
		389	respipe_close (TO_SOCKET (respipe [1]));
		390
		391	#ifdef _WIN32
		392	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		393	#else
		394	if (pipe (respipe))
		395	#endif
		396	croak ("unable to initialize result pipe");
		397
		398	if (old_readfd >= 0)
		399	{
		400	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		401	croak ("unable to initialize result pipe(2)");
		402
		403	respipe_close (respipe [0]);
		404	respipe [0] = old_readfd;
		405	}
		406
		407	#ifdef _WIN32
		408	int arg = 1;
		409	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		410	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		411	#else
		412	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		413	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		414	#endif
		415	croak ("unable to initialize result pipe(3)");
		416
		417	respipe_osf [0] = TO_SOCKET (respipe [0]);
		418	respipe_osf [1] = TO_SOCKET (respipe [1]);
		419	}
		420
		421	static void poll_wait (void)
		422	{
		423	fd_set rfd;
		424
		425	while (eio_nreqs ())
		426	{
		427	int size;
		428
		429	X_LOCK (reslock);
		430	size = res_queue.size;
		431	X_UNLOCK (reslock);
		432
		433	if (size)
		434	return;
		435
		436	etp_maybe_start_thread ();
		437
		438	FD_ZERO (&rfd);
		439	FD_SET (respipe [0], &rfd);
		440
		441	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		442	}
		443	}
		444
		445	static int poll_cb (void)
		446	{
		447	for (;;)
		448	{
		449	int res = eio_poll ();
		450
		451	if (res > 0)
		452	croak (0);
		453
		454	if (!max_outstanding || max_outstanding > eio_nreqs ())
		455	return res;
		456
		457	poll_wait ();
		458	}
		459	}
		460
		461	static void atfork_child (void)
		462	{
		463	create_respipe ();
		464	}
		465
		466	static SV *
		467	get_cb (SV *cb_sv)
		468	{
		469	HV *st;
		470	GV *gvp;
		471	CV *cv;
		472
		473	if (!SvOK (cb_sv))
471	return 0;	474	return 0;
		475
		476	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		477
		478	if (!cv)
		479	croak ("IO::AIO callback must be undef or a CODE reference");
		480
		481	return (SV *)cv;
472	}	482	}
473		483
474	#define dREQ \	484	#define dREQ \
		485	SV *cb_cv; \
475	aio_req req; \	486	aio_req req; \
		487	int req_pri = next_pri; \
		488	next_pri = EIO_PRI_DEFAULT; \
476	\	489	\
477	if (SvOK (callback) && !SvROK (callback)) \	490	cb_cv = get_cb (callback); \
478	croak ("clalback must be undef or of reference type"); \
479	\	491	\
480	Newz (0, req, 1, aio_cb); \	492	Newz (0, req, 1, eio_req); \
481	if (!req) \	493	if (!req) \
482	croak ("out of memory during aio_req allocation"); \	494	croak ("out of memory during eio_req allocation"); \
483	\	495	\
484	req->callback = SvREFCNT_inc (callback);	496	req->callback = SvREFCNT_inc (cb_cv); \
		497	req->pri = req_pri
		498
		499	#define REQ_SEND \
		500	PUTBACK; \
		501	req_submit (req); \
		502	SPAGAIN; \
		503	\
		504	if (GIMME_V != G_VOID) \
		505	XPUSHs (req_sv (req, AIO_REQ_KLASS));
485		506
486	MODULE = IO::AIO PACKAGE = IO::AIO	507	MODULE = IO::AIO PACKAGE = IO::AIO
487		508
488	PROTOTYPES: ENABLE	509	PROTOTYPES: ENABLE
489		510
490	BOOT:	511	BOOT:
491	{	512	{
492	if (pipe (respipe))	513	stash = gv_stashpv ("IO::AIO", 1);
493	croak ("unable to initialize result pipe");
494		514
495	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	515	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
496	croak ("cannot set result pipe to nonblocking mode");	516	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		517	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		518	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		519	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		520	#ifndef _WIN32
		521	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		522	#endif
497		523
498	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	524	create_respipe ();
499	croak ("cannot set result pipe to nonblocking mode");
500		525
501	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	526	if (eio_init (want_poll, done_poll) < 0)
502	}	527	croak ("IO::AIO: unable to initialise eio library");
503		528
		529	/* atfork child called in fifo order, so before eio's handler */
		530	X_THREAD_ATFORK (0, 0, atfork_child);
		531	}
		532
504	void	533	void
505	min_parallel(nthreads)	534	max_poll_reqs (int nreqs)
506	int nthreads
507	PROTOTYPE: $	535	PROTOTYPE: $
		536	CODE:
		537	eio_set_max_poll_reqs (nreqs);
508		538
509	void	539	void
510	max_parallel(nthreads)	540	max_poll_time (double nseconds)
511	int nthreads
512	PROTOTYPE: $	541	PROTOTYPE: $
513
514	int
515	max_outstanding(nreqs)
516	int nreqs
517	PROTOTYPE: $
518	CODE:	542	CODE:
519	RETVAL = max_outstanding;	543	eio_set_max_poll_time (nseconds);
		544
		545	void
		546	min_parallel (int nthreads)
		547	PROTOTYPE: $
		548	CODE:
		549	eio_set_min_parallel (nthreads);
		550
		551	void
		552	max_parallel (int nthreads)
		553	PROTOTYPE: $
		554	CODE:
		555	eio_set_max_parallel (nthreads);
		556
		557	void
		558	max_idle (int nthreads)
		559	PROTOTYPE: $
		560	CODE:
		561	eio_set_max_idle (nthreads);
		562
		563	void
		564	max_outstanding (int maxreqs)
		565	PROTOTYPE: $
		566	CODE:
520	max_outstanding = nreqs;	567	max_outstanding = maxreqs;
521		568
522	void	569	void
523	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	570	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
524	SV * pathname
525	int flags
526	int mode
527	SV * callback
528	PROTOTYPE: $$$;$	571	PROTOTYPE: $$$;$
529	CODE:	572	PPCODE:
530	{	573	{
531	dREQ;	574	dREQ;
532		575
533	req->type = REQ_OPEN;	576	req->type = EIO_OPEN;
534	req->data = newSVsv (pathname);	577	req->sv1 = newSVsv (pathname);
535	req->dataptr = SvPVbyte_nolen (req->data);	578	req->ptr1 = SvPVbyte_nolen (req->sv1);
536	req->fd = flags;	579	req->int1 = flags;
537	req->mode = mode;	580	req->int2 = mode;
538		581
539	send_req (req);	582	REQ_SEND;
540	}	583	}
541		584
542	void	585	void
543	aio_close(fh,callback=&PL_sv_undef)	586	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
544	SV * fh
545	SV * callback
546	PROTOTYPE: $;$	587	PROTOTYPE: $;$
547	ALIAS:	588	ALIAS:
548	aio_close = REQ_CLOSE
549	aio_fsync = REQ_FSYNC	589	aio_fsync = EIO_FSYNC
550	aio_fdatasync = REQ_FDATASYNC	590	aio_fdatasync = EIO_FDATASYNC
551	CODE:	591	PPCODE:
552	{	592	{
553	dREQ;	593	dREQ;
554		594
555	req->type = ix;	595	req->type = ix;
556	req->fh = newSVsv (fh);	596	req->sv1 = newSVsv (fh);
557	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	597	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
558		598
559	send_req (req);	599	REQ_SEND (req);
560	}	600	}
561		601
562	void	602	void
		603	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		604	PROTOTYPE: $;$
		605	PPCODE:
		606	{
		607	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		608	dREQ;
		609
		610	if (close_pipe < 0)
		611	{
		612	int pipefd [2];
		613
		614	if (pipe (pipefd) < 0
		615	|| close (pipefd [1]) < 0
		616	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		617	abort (); /*D*/
		618
		619	close_pipe = pipefd [0];
		620	}
		621
		622	req->type = EIO_DUP2;
		623	req->int1 = close_pipe;
		624	req->sv2 = newSVsv (fh);
		625	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		626
		627	REQ_SEND (req);
		628	}
		629
		630	void
563	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	631	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
564	SV * fh
565	UV offset
566	IV length
567	SV * data
568	IV dataoffset
569	SV * callback
570	ALIAS:	632	ALIAS:
571	aio_read = REQ_READ	633	aio_read = EIO_READ
572	aio_write = REQ_WRITE	634	aio_write = EIO_WRITE
573	PROTOTYPE: $$$$$;$	635	PROTOTYPE: $$$$$;$
574	CODE:	636	PPCODE:
575	{	637	{
576	aio_req req;
577	STRLEN svlen;	638	STRLEN svlen;
578	char *svptr = SvPVbyte (data, svlen);	639	char *svptr = SvPVbyte (data, svlen);
		640	UV len = SvUV (length);
579		641
580	SvUPGRADE (data, SVt_PV);	642	SvUPGRADE (data, SVt_PV);
581	SvPOK_on (data);	643	SvPOK_on (data);
582		644
583	if (dataoffset < 0)	645	if (dataoffset < 0)
584	dataoffset += svlen;	646	dataoffset += svlen;
585		647
586	if (dataoffset < 0 || dataoffset > svlen)	648	if (dataoffset < 0 || dataoffset > svlen)
587	croak ("data offset outside of string");	649	croak ("dataoffset outside of data scalar");
588		650
589	if (ix == REQ_WRITE)	651	if (ix == EIO_WRITE)
590	{	652	{
591	/* write: check length and adjust. */	653	/* write: check length and adjust. */
592	if (length < 0 || length + dataoffset > svlen)	654	if (!SvOK (length) || len + dataoffset > svlen)
593	length = svlen - dataoffset;	655	len = svlen - dataoffset;
594	}	656	}
595	else	657	else
596	{	658	{
597	/* read: grow scalar as necessary */	659	/* read: grow scalar as necessary */
598	svptr = SvGROW (data, length + dataoffset);	660	svptr = SvGROW (data, len + dataoffset + 1);
599	}	661	}
600		662
601	if (length < 0)	663	if (len < 0)
602	croak ("length must not be negative");	664	croak ("length must not be negative");
603		665
604	{	666	{
605	dREQ;	667	dREQ;
606		668
607	req->type = ix;	669	req->type = ix;
608	req->fh = newSVsv (fh);	670	req->sv1 = newSVsv (fh);
609	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	671	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
610	: IoOFP (sv_2io (fh)));	672	: IoOFP (sv_2io (fh)));
		673	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
611	req->offset = offset;	674	req->size = len;
612	req->length = length;
613	req->data = SvREFCNT_inc (data);	675	req->sv2 = SvREFCNT_inc_NN (data);
614	req->dataptr = (char *)svptr + dataoffset;	676	req->ptr2 = (char *)svptr + dataoffset;
615	req->callback = SvREFCNT_inc (callback);	677	req->stroffset = dataoffset;
616		678
617	send_req (req);	679	if (!SvREADONLY (data))
		680	{
		681	SvREADONLY_on (data);
		682	req->flags |= FLAG_SV2_RO_OFF;
		683	}
		684
		685	REQ_SEND;
618	}	686	}
619	}	687	}
620		688
621	void	689	void
		690	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		691	PROTOTYPE: $$;$
		692	PPCODE:
		693	{
		694	SV *data;
		695	dREQ;
		696
		697	req->type = EIO_READLINK;
		698	req->sv1 = newSVsv (path);
		699	req->ptr1 = SvPVbyte_nolen (req->sv1);
		700
		701	REQ_SEND;
		702	}
		703
		704	void
		705	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		706	PROTOTYPE: $$$$;$
		707	PPCODE:
		708	{
		709	dREQ;
		710
		711	req->type = EIO_SENDFILE;
		712	req->sv1 = newSVsv (out_fh);
		713	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		714	req->sv2 = newSVsv (in_fh);
		715	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		716	req->offs = SvVAL64 (in_offset);
		717	req->size = length;
		718
		719	REQ_SEND;
		720	}
		721
		722	void
622	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	723	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
623	SV * fh
624	UV offset
625	IV length
626	SV * callback
627	PROTOTYPE: $$$;$	724	PROTOTYPE: $$$;$
628	CODE:	725	PPCODE:
629	{	726	{
630	dREQ;	727	dREQ;
631		728
632	req->type = REQ_READAHEAD;	729	req->type = EIO_READAHEAD;
633	req->fh = newSVsv (fh);	730	req->sv1 = newSVsv (fh);
634	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	731	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
635	req->offset = offset;	732	req->offs = SvVAL64 (offset);
636	req->length = length;	733	req->size = length;
637		734
638	send_req (req);	735	REQ_SEND;
639	}	736	}
640		737
641	void	738	void
642	aio_stat(fh_or_path,callback=&PL_sv_undef)	739	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
643	SV * fh_or_path
644	SV * callback
645	ALIAS:	740	ALIAS:
646	aio_stat = REQ_STAT	741	aio_stat = EIO_STAT
647	aio_lstat = REQ_LSTAT	742	aio_lstat = EIO_LSTAT
648	CODE:	743	PPCODE:
649	{	744	{
650	dREQ;	745	dREQ;
651		746
652	New (0, req->statdata, 1, Stat_t);	747	req->sv1 = newSVsv (fh_or_path);
653	if (!req->statdata)
654	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
655		748
656	if (SvPOK (fh_or_path))	749	if (SvPOK (req->sv1))
657	{	750	{
658	req->type = ix;	751	req->type = ix;
659	req->data = newSVsv (fh_or_path);
660	req->dataptr = SvPVbyte_nolen (req->data);	752	req->ptr1 = SvPVbyte_nolen (req->sv1);
661	}	753	}
662	else	754	else
663	{	755	{
664	req->type = REQ_FSTAT;	756	req->type = EIO_FSTAT;
665	req->fh = newSVsv (fh_or_path);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	757	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		758	}
		759
		760	REQ_SEND;
		761	}
		762
		763	void
		764	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		765	PPCODE:
		766	{
		767	dREQ;
		768
		769	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		770	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		771	req->sv1 = newSVsv (fh_or_path);
		772
		773	if (SvPOK (req->sv1))
667	}	774	{
		775	req->type = EIO_UTIME;
		776	req->ptr1 = SvPVbyte_nolen (req->sv1);
		777	}
		778	else
		779	{
		780	req->type = EIO_FUTIME;
		781	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		782	}
668		783
669	send_req (req);	784	REQ_SEND;
670	}	785	}
671		786
672	void	787	void
		788	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		789	PPCODE:
		790	{
		791	dREQ;
		792
		793	req->sv1 = newSVsv (fh_or_path);
		794	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		795
		796	if (SvPOK (req->sv1))
		797	{
		798	req->type = EIO_TRUNCATE;
		799	req->ptr1 = SvPVbyte_nolen (req->sv1);
		800	}
		801	else
		802	{
		803	req->type = EIO_FTRUNCATE;
		804	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		805	}
		806
		807	REQ_SEND;
		808	}
		809
		810	void
		811	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		812	ALIAS:
		813	aio_chmod = EIO_CHMOD
		814	aio_mkdir = EIO_MKDIR
		815	PPCODE:
		816	{
		817	dREQ;
		818
		819	req->int2 = mode;
		820	req->sv1 = newSVsv (fh_or_path);
		821
		822	if (SvPOK (req->sv1))
		823	{
		824	req->type = ix;
		825	req->ptr1 = SvPVbyte_nolen (req->sv1);
		826	}
		827	else
		828	{
		829	req->type = EIO_FCHMOD;
		830	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		831	}
		832
		833	REQ_SEND;
		834	}
		835
		836	void
		837	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		838	PPCODE:
		839	{
		840	dREQ;
		841
		842	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		843	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		844	req->sv1 = newSVsv (fh_or_path);
		845
		846	if (SvPOK (req->sv1))
		847	{
		848	req->type = EIO_CHOWN;
		849	req->ptr1 = SvPVbyte_nolen (req->sv1);
		850	}
		851	else
		852	{
		853	req->type = EIO_FCHOWN;
		854	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		855	}
		856
		857	REQ_SEND;
		858	}
		859
		860	void
673	aio_unlink(pathname,callback=&PL_sv_undef)	861	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
674	SV * pathname
675	SV * callback
676	ALIAS:	862	ALIAS:
677	aio_unlink = REQ_UNLINK	863	aio_unlink = EIO_UNLINK
678	aio_rmdir = REQ_RMDIR	864	aio_rmdir = EIO_RMDIR
		865	aio_readdir = EIO_READDIR
679	CODE:	866	PPCODE:
680	{	867	{
681	dREQ;	868	dREQ;
682		869
683	req->type = ix;	870	req->type = ix;
684	req->data = newSVsv (pathname);	871	req->sv1 = newSVsv (pathname);
685	req->dataptr = SvPVbyte_nolen (req->data);	872	req->ptr1 = SvPVbyte_nolen (req->sv1);
		873
		874	REQ_SEND;
		875	}
		876
		877	void
		878	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		879	ALIAS:
		880	aio_link = EIO_LINK
		881	aio_symlink = EIO_SYMLINK
		882	aio_rename = EIO_RENAME
		883	PPCODE:
		884	{
		885	dREQ;
686		886
687	send_req (req);	887	req->type = ix;
688	}	888	req->sv1 = newSVsv (oldpath);
689		889	req->ptr1 = SvPVbyte_nolen (req->sv1);
690	void	890	req->sv2 = newSVsv (newpath);
691	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	891	req->ptr2 = SvPVbyte_nolen (req->sv2);
692	SV * oldpath
693	SV * newpath
694	SV * callback
695	CODE:
696	{
697	dREQ;
698		892
699	req->type = REQ_SYMLINK;	893	REQ_SEND;
700	req->fh = newSVsv (oldpath);	894	}
701	req->data2ptr = SvPVbyte_nolen (req->fh);	895
702	req->data = newSVsv (newpath);	896	void
703	req->dataptr = SvPVbyte_nolen (req->data);	897	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		898	PPCODE:
		899	{
		900	dREQ;
704		901
705	send_req (req);	902	req->type = EIO_MKNOD;
		903	req->sv1 = newSVsv (pathname);
		904	req->ptr1 = SvPVbyte_nolen (req->sv1);
		905	req->int2 = (mode_t)mode;
		906	req->offs = dev;
		907
		908	REQ_SEND;
706	}	909	}
707		910
708	void	911	void
		912	aio_busy (double delay, SV *callback=&PL_sv_undef)
		913	PPCODE:
		914	{
		915	dREQ;
		916
		917	req->type = EIO_BUSY;
		918	req->nv1 = delay < 0. ? 0. : delay;
		919
		920	REQ_SEND;
		921	}
		922
		923	void
		924	aio_group (SV *callback=&PL_sv_undef)
		925	PROTOTYPE: ;$
		926	PPCODE:
		927	{
		928	dREQ;
		929
		930	req->type = EIO_GROUP;
		931
		932	req_submit (req);
		933	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		934	}
		935
		936	void
		937	aio_nop (SV *callback=&PL_sv_undef)
		938	ALIAS:
		939	aio_nop = EIO_NOP
		940	aio_sync = EIO_SYNC
		941	PPCODE:
		942	{
		943	dREQ;
		944
		945	req->type = ix;
		946
		947	REQ_SEND;
		948	}
		949
		950	int
		951	aioreq_pri (int pri = 0)
		952	PROTOTYPE: ;$
		953	CODE:
		954	RETVAL = next_pri;
		955	if (items > 0)
		956	{
		957	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		958	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		959	next_pri = pri;
		960	}
		961	OUTPUT:
		962	RETVAL
		963
		964	void
		965	aioreq_nice (int nice = 0)
		966	CODE:
		967	nice = next_pri - nice;
		968	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		969	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		970	next_pri = nice;
		971
		972	void
709	flush()	973	flush ()
710	PROTOTYPE:	974	PROTOTYPE:
711	CODE:	975	CODE:
712	while (nreqs)	976	while (eio_nreqs ())
713	{	977	{
714	poll_wait ();	978	poll_wait ();
715	poll_cb ();	979	poll_cb ();
716	}	980	}
717		981
718	void	982	int
719	poll()	983	poll()
720	PROTOTYPE:	984	PROTOTYPE:
721	CODE:	985	CODE:
722	if (nreqs)
723	{
724	poll_wait ();	986	poll_wait ();
725	poll_cb ();	987	RETVAL = poll_cb ();
726	}	988	OUTPUT:
		989	RETVAL
727		990
728	int	991	int
729	poll_fileno()	992	poll_fileno()
730	PROTOTYPE:	993	PROTOTYPE:
731	CODE:	994	CODE:
…		…
743		1006
744	void	1007	void
745	poll_wait()	1008	poll_wait()
746	PROTOTYPE:	1009	PROTOTYPE:
747	CODE:	1010	CODE:
748	if (nreqs)
749	poll_wait ();	1011	poll_wait ();
750		1012
751	int	1013	int
752	nreqs()	1014	nreqs()
753	PROTOTYPE:	1015	PROTOTYPE:
754	CODE:	1016	CODE:
755	RETVAL = nreqs;	1017	RETVAL = eio_nreqs ();
756	OUTPUT:	1018	OUTPUT:
757	RETVAL	1019	RETVAL
758		1020
		1021	int
		1022	nready()
		1023	PROTOTYPE:
		1024	CODE:
		1025	RETVAL = eio_nready ();
		1026	OUTPUT:
		1027	RETVAL
		1028
		1029	int
		1030	npending()
		1031	PROTOTYPE:
		1032	CODE:
		1033	RETVAL = eio_npending ();
		1034	OUTPUT:
		1035	RETVAL
		1036
		1037	int
		1038	nthreads()
		1039	PROTOTYPE:
		1040	CODE:
		1041	RETVAL = eio_nthreads ();
		1042	OUTPUT:
		1043	RETVAL
		1044
		1045	void _on_next_submit (SV *cb)
		1046	CODE:
		1047	SvREFCNT_dec (on_next_submit);
		1048	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1049
		1050	PROTOTYPES: DISABLE
		1051
		1052	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1053
		1054	void
		1055	cancel (aio_req_ornot req)
		1056	CODE:
		1057	eio_cancel (req);
		1058
		1059	void
		1060	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1061	PPCODE:
		1062	{
		1063	if (GIMME_V != G_VOID)
		1064	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1065
		1066	if (items > 1)
		1067	{
		1068	SV *cb_cv = get_cb (callback);
		1069
		1070	SvREFCNT_dec (req->callback);
		1071	req->callback = SvREFCNT_inc (cb_cv);
		1072	}
		1073	}
		1074
		1075	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1076
		1077	void
		1078	add (aio_req grp, ...)
		1079	PPCODE:
		1080	{
		1081	int i;
		1082
		1083	if (grp->int1 == 2)
		1084	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1085
		1086	for (i = 1; i < items; ++i )
		1087	{
		1088	aio_req req;
		1089
		1090	if (GIMME_V != G_VOID)
		1091	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1092
		1093	req = SvAIO_REQ (ST (i));
		1094
		1095	if (req)
		1096	eio_grp_add (grp, req);
		1097	}
		1098	}
		1099
		1100	void
		1101	cancel_subs (aio_req_ornot req)
		1102	CODE:
		1103	req_cancel_subs (req);
		1104
		1105	void
		1106	result (aio_req grp, ...)
		1107	CODE:
		1108	{
		1109	int i;
		1110	AV *av;
		1111
		1112	grp->errorno = errno;
		1113
		1114	av = newAV ();
		1115
		1116	for (i = 1; i < items; ++i )
		1117	av_push (av, newSVsv (ST (i)));
		1118
		1119	SvREFCNT_dec (grp->sv1);
		1120	grp->sv1 = (SV *)av;
		1121	}
		1122
		1123	void
		1124	errno (aio_req grp, int errorno = errno)
		1125	CODE:
		1126	grp->errorno = errorno;
		1127
		1128	void
		1129	limit (aio_req grp, int limit)
		1130	CODE:
		1131	eio_grp_limit (grp, limit);
		1132
		1133	void
		1134	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1135	CODE:
		1136	{
		1137	SvREFCNT_dec (grp->sv2);
		1138	grp->sv2 = newSVsv (callback);
		1139
		1140	if (grp->int2 <= 0)
		1141	grp->int2 = 2;
		1142
		1143	eio_grp_limit (grp, grp->int2);
		1144	}
		1145

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