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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 1.132 by root, Mon Oct 13 10:38:17 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 req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
		118
30	enum {	119	enum {
31	REQ_QUIT,	120	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	};	121	};
39		122
40	typedef struct aio_cb {	123	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		124
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;	125	typedef eio_req *aio_req;
		126	typedef eio_req *aio_req_ornot;
59		127
60	static int started;	128	static SV *on_next_submit;
61	static volatile int nreqs;	129	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	130	static int max_outstanding;
63	static int respipe [2];
64		131
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	132	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		133
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	134	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */	135	static void req_cancel (aio_req req);
72		136
73	static void	137	static void want_poll (void)
74	poll_wait ()
75	{	138	{
76	if (nreqs && !ress)	139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
		150
		151	/* must be called at most once */
		152	static SV *req_sv (aio_req req, const char *klass)
		153	{
		154	if (!req->self)
77	{	155	{
78	fd_set rfd;	156	req->self = (SV *)newHV ();
79	FD_ZERO(&rfd);	157	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	}	158	}
84	}
85		159
86	static int	160	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
87	poll_cb ()	161	}
		162
		163	static aio_req SvAIO_REQ (SV *sv)
		164	{
		165	MAGIC *mg;
		166
		167	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		168	croak ("object of class " AIO_REQ_KLASS " expected");
		169
		170	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		171
		172	return mg ? (aio_req)mg->mg_ptr : 0;
		173	}
		174
		175	static void aio_grp_feed (aio_req grp)
		176	{
		177	if (grp->sv2 && SvOK (grp->sv2))
		178	{
		179	dSP;
		180
		181	ENTER;
		182	SAVETMPS;
		183	PUSHMARK (SP);
		184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		185	PUTBACK;
		186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		187	SPAGAIN;
		188	FREETMPS;
		189	LEAVE;
		190	}
		191	}
		192
		193	static void req_submit (eio_req *req)
		194	{
		195	eio_submit (req);
		196
		197	if (expect_false (on_next_submit))
		198	{
		199	dSP;
		200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
		207	}
		208	}
		209
		210	static int req_invoke (eio_req *req)
88	{	211	{
89	dSP;	212	dSP;
90	int count = 0;
91	int do_croak = 0;
92	aio_req req, prv;
93		213
94	pthread_mutex_lock (&reslock);	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
95		216
96	{	217	if (!EIO_CANCELLED (req) && 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	{	218	{
110	nreqs--;	219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
111		223
112	if (req->type == REQ_QUIT)	224	switch (req->type)
113	started--;
114	else
115	{	225	{
116	int errorno = errno;	226	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	{	227	{
131	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	228	SV *rv = &PL_sv_undef;
132	PL_laststatval = req->result;
133	PL_statcache = *(req->statdata);
134		229
135	Safefree (req->statdata);	230	if (req->result >= 0)
		231	{
		232	int i;
		233	char *buf = req->ptr2;
		234	AV *av = newAV ();
		235
		236	av_extend (av, req->result - 1);
		237
		238	for (i = 0; i < req->result; ++i)
		239	{
		240	SV *sv = newSVpv (buf, 0);
		241
		242	av_store (av, i, sv);
		243	buf += SvCUR (sv) + 1;
		244	}
		245
		246	rv = sv_2mortal (newRV_noinc ((SV *)av));
		247	}
		248
		249	PUSHs (rv);
136	}	250	}
		251	break;
137		252
138	ENTER;	253	case EIO_OPEN:
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141
142	if (req->type == REQ_OPEN)
143	{	254	{
144	/* convert fd to fh */	255	/* convert fd to fh */
145	SV *fh;	256	SV *fh = &PL_sv_undef;
146		257
147	PUTBACK;	258	if (req->result >= 0)
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	259	{
149	SPAGAIN;	260	GV *gv = (GV *)sv_newmortal ();
		261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
150		267
151	fh = SvREFCNT_inc (POPs);	268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
152		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
153	PUSHMARK (SP);	280	PUSHs (fh);
154	XPUSHs (sv_2mortal (fh));
155	}	281	}
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;	282	break;
411		283
412	pthread_cond_wait (&reqwait, &reqlock);	284	case EIO_GROUP:
413	}	285	req->int1 = 2; /* mark group as finished */
414		286
415	pthread_mutex_unlock (&reqlock);	287	if (req->sv1)
416
417	errno = 0; /* strictly unnecessary */
418
419	type = req->type;
420
421	switch (type)
422	{	288	{
423	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	289	int i;
424	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	290	AV *av = (AV *)req->sv1;
425		291
426	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	292	EXTEND (SP, AvFILL (av) + 1);
427		293	for (i = 0; i <= AvFILL (av); ++i)
428	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	294	PUSHs (*av_fetch (av, i, 0));
429	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	295	}
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;	296	break;
443		297
		298	case EIO_NOP:
		299	case EIO_BUSY:
		300	break;
		301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		318	*SvEND (req->sv2) = 0;
		319	PUSHs (sv_2mortal (newSViv (req->result)));
		320	break;
		321
		322	case EIO_DUP2:
		323	if (req->result > 0)
		324	req->result = 0;
		325	/* FALLTHROUGH */
		326
444	default:	327	default:
445	req->result = ENOSYS;	328	PUSHs (sv_2mortal (newSViv (req->result)));
446	break;	329	break;
447	}	330	}
448		331
449	req->errorno = errno;	332	errno = req->errorno;
450		333
451	pthread_mutex_lock (&reslock);	334	PUTBACK;
		335	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		336	SPAGAIN;
452		337
453	req->next = 0;	338	FREETMPS;
		339	LEAVE;
454		340
455	if (rese)	341	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	}	342	}
470	while (type != REQ_QUIT);
471		343
		344	return !!SvTRUE (ERRSV);
		345	}
		346
		347	static void req_destroy (aio_req req)
		348	{
		349	if (req->self)
		350	{
		351	sv_unmagic (req->self, PERL_MAGIC_ext);
		352	SvREFCNT_dec (req->self);
		353	}
		354
		355	SvREFCNT_dec (req->sv1);
		356	SvREFCNT_dec (req->sv2);
		357	SvREFCNT_dec (req->callback);
		358
		359	Safefree (req);
		360	}
		361
		362	static void req_cancel_subs (aio_req grp)
		363	{
		364	aio_req sub;
		365
		366	if (grp->type != EIO_GROUP)
		367	return;
		368
		369	SvREFCNT_dec (grp->sv2);
		370	grp->sv2 = 0;
		371
		372	eio_grp_cancel (grp);
		373	}
		374
		375	#ifdef USE_SOCKETS_AS_HANDLES
		376	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		377	#else
		378	# define TO_SOCKET(x) (x)
		379	#endif
		380
		381	static void
		382	create_respipe (void)
		383	{
		384	int old_readfd = respipe [0];
		385
		386	if (respipe [1] >= 0)
		387	respipe_close (TO_SOCKET (respipe [1]));
		388
		389	#ifdef _WIN32
		390	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		391	#else
		392	if (pipe (respipe))
		393	#endif
		394	croak ("unable to initialize result pipe");
		395
		396	if (old_readfd >= 0)
		397	{
		398	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		399	croak ("unable to initialize result pipe(2)");
		400
		401	respipe_close (respipe [0]);
		402	respipe [0] = old_readfd;
		403	}
		404
		405	#ifdef _WIN32
		406	int arg = 1;
		407	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		408	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		409	#else
		410	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		411	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		412	#endif
		413	croak ("unable to initialize result pipe(3)");
		414
		415	respipe_osf [0] = TO_SOCKET (respipe [0]);
		416	respipe_osf [1] = TO_SOCKET (respipe [1]);
		417	}
		418
		419	static void poll_wait (void)
		420	{
		421	fd_set rfd;
		422
		423	while (eio_nreqs ())
		424	{
		425	int size;
		426
		427	X_LOCK (reslock);
		428	size = res_queue.size;
		429	X_UNLOCK (reslock);
		430
		431	if (size)
		432	return;
		433
		434	etp_maybe_start_thread ();
		435
		436	FD_ZERO (&rfd);
		437	FD_SET (respipe [0], &rfd);
		438
		439	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		440	}
		441	}
		442
		443	static int poll_cb (void)
		444	{
		445	for (;;)
		446	{
		447	int res = eio_poll ();
		448
		449	if (res > 0)
		450	croak (0);
		451
		452	if (!max_outstanding || max_outstanding > eio_nreqs ())
		453	return res;
		454
		455	poll_wait ();
		456	}
		457	}
		458
		459	static void atfork_child (void)
		460	{
		461	create_respipe ();
		462	}
		463
		464	static SV *
		465	get_cb (SV *cb_sv)
		466	{
		467	HV *st;
		468	GV *gvp;
		469	CV *cv;
		470
		471	if (!SvOK (cb_sv))
472	return 0;	472	return 0;
		473
		474	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		475
		476	if (!cv)
		477	croak ("IO::AIO callback must be undef or a CODE reference");
		478
		479	return (SV *)cv;
473	}	480	}
474		481
475	#define dREQ \	482	#define dREQ \
		483	SV *cb_cv; \
476	aio_req req; \	484	aio_req req; \
		485	int req_pri = next_pri; \
		486	next_pri = EIO_PRI_DEFAULT; \
477	\	487	\
478	if (SvOK (callback) && !SvROK (callback)) \	488	cb_cv = get_cb (callback); \
479	croak ("clalback must be undef or of reference type"); \
480	\	489	\
481	Newz (0, req, 1, aio_cb); \	490	Newz (0, req, 1, eio_req); \
482	if (!req) \	491	if (!req) \
483	croak ("out of memory during aio_req allocation"); \	492	croak ("out of memory during eio_req allocation"); \
484	\	493	\
485	req->callback = SvREFCNT_inc (callback);	494	req->callback = SvREFCNT_inc (cb_cv); \
		495	req->pri = req_pri
		496
		497	#define REQ_SEND \
		498	PUTBACK; \
		499	req_submit (req); \
		500	SPAGAIN; \
		501	\
		502	if (GIMME_V != G_VOID) \
		503	XPUSHs (req_sv (req, AIO_REQ_KLASS));
486		504
487	MODULE = IO::AIO PACKAGE = IO::AIO	505	MODULE = IO::AIO PACKAGE = IO::AIO
488		506
489	PROTOTYPES: ENABLE	507	PROTOTYPES: ENABLE
490		508
491	BOOT:	509	BOOT:
492	{	510	{
493	if (pipe (respipe))	511	stash = gv_stashpv ("IO::AIO", 1);
494	croak ("unable to initialize result pipe");
495		512
496	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	513	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
497	croak ("cannot set result pipe to nonblocking mode");	514	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		515	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		516	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		517	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		518	#ifndef _WIN32
		519	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		520	#endif
498		521
499	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	522	create_respipe ();
500	croak ("cannot set result pipe to nonblocking mode");
501		523
502	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	524	if (eio_init (want_poll, done_poll) < 0)
503	}	525	croak ("IO::AIO: unable to initialise eio library");
504		526
		527	/* atfork child called in fifo order, so before eio's handler */
		528	X_THREAD_ATFORK (0, 0, atfork_child);
		529	}
		530
505	void	531	void
506	min_parallel(nthreads)	532	max_poll_reqs (int nreqs)
507	int nthreads
508	PROTOTYPE: $	533	PROTOTYPE: $
		534	CODE:
		535	eio_set_max_poll_reqs (nreqs);
509		536
510	void	537	void
511	max_parallel(nthreads)	538	max_poll_time (double nseconds)
512	int nthreads
513	PROTOTYPE: $	539	PROTOTYPE: $
514
515	int
516	max_outstanding(nreqs)
517	int nreqs
518	PROTOTYPE: $
519	CODE:	540	CODE:
520	RETVAL = max_outstanding;	541	eio_set_max_poll_time (nseconds);
		542
		543	void
		544	min_parallel (int nthreads)
		545	PROTOTYPE: $
		546	CODE:
		547	eio_set_min_parallel (nthreads);
		548
		549	void
		550	max_parallel (int nthreads)
		551	PROTOTYPE: $
		552	CODE:
		553	eio_set_max_parallel (nthreads);
		554
		555	void
		556	max_idle (int nthreads)
		557	PROTOTYPE: $
		558	CODE:
		559	eio_set_max_idle (nthreads);
		560
		561	void
		562	max_outstanding (int maxreqs)
		563	PROTOTYPE: $
		564	CODE:
521	max_outstanding = nreqs;	565	max_outstanding = maxreqs;
522		566
523	void	567	void
524	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	568	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: $$$;$	569	PROTOTYPE: $$$;$
530	CODE:	570	PPCODE:
531	{	571	{
532	dREQ;	572	dREQ;
533		573
534	req->type = REQ_OPEN;	574	req->type = EIO_OPEN;
535	req->data = newSVsv (pathname);	575	req->sv1 = newSVsv (pathname);
536	req->dataptr = SvPVbyte_nolen (req->data);	576	req->ptr1 = SvPVbyte_nolen (req->sv1);
537	req->fd = flags;	577	req->int1 = flags;
538	req->mode = mode;	578	req->int2 = mode;
539		579
540	send_req (req);	580	REQ_SEND;
541	}	581	}
542		582
543	void	583	void
544	aio_close(fh,callback=&PL_sv_undef)	584	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
545	SV * fh
546	SV * callback
547	PROTOTYPE: $;$	585	PROTOTYPE: $;$
548	ALIAS:	586	ALIAS:
549	aio_close = REQ_CLOSE
550	aio_fsync = REQ_FSYNC	587	aio_fsync = EIO_FSYNC
551	aio_fdatasync = REQ_FDATASYNC	588	aio_fdatasync = EIO_FDATASYNC
552	CODE:	589	PPCODE:
553	{	590	{
554	dREQ;	591	dREQ;
555		592
556	req->type = ix;	593	req->type = ix;
557	req->fh = newSVsv (fh);	594	req->sv1 = newSVsv (fh);
558	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	595	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
559		596
560	send_req (req);	597	REQ_SEND (req);
561	}	598	}
562		599
563	void	600	void
		601	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		602	PROTOTYPE: $;$
		603	PPCODE:
		604	{
		605	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		606	dREQ;
		607
		608	if (close_pipe < 0)
		609	{
		610	int pipefd [2];
		611
		612	if (pipe (pipefd) < 0
		613	|| close (pipefd [1]) < 0
		614	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		615	abort (); /*D*/
		616
		617	close_pipe = pipefd [0];
		618	}
		619
		620	req->type = EIO_DUP2;
		621	req->int1 = close_pipe;
		622	req->sv2 = newSVsv (fh);
		623	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		624
		625	REQ_SEND (req);
		626	}
		627
		628	void
564	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	629	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:	630	ALIAS:
572	aio_read = REQ_READ	631	aio_read = EIO_READ
573	aio_write = REQ_WRITE	632	aio_write = EIO_WRITE
574	PROTOTYPE: $$$$$;$	633	PROTOTYPE: $$$$$;$
575	CODE:	634	PPCODE:
576	{	635	{
577	aio_req req;
578	STRLEN svlen;	636	STRLEN svlen;
579	char *svptr = SvPVbyte (data, svlen);	637	char *svptr = SvPVbyte (data, svlen);
		638	UV len = SvUV (length);
580		639
581	SvUPGRADE (data, SVt_PV);	640	SvUPGRADE (data, SVt_PV);
582	SvPOK_on (data);	641	SvPOK_on (data);
583		642
584	if (dataoffset < 0)	643	if (dataoffset < 0)
585	dataoffset += svlen;	644	dataoffset += svlen;
586		645
587	if (dataoffset < 0 || dataoffset > svlen)	646	if (dataoffset < 0 || dataoffset > svlen)
588	croak ("data offset outside of string");	647	croak ("dataoffset outside of data scalar");
589		648
590	if (ix == REQ_WRITE)	649	if (ix == EIO_WRITE)
591	{	650	{
592	/* write: check length and adjust. */	651	/* write: check length and adjust. */
593	if (length < 0 || length + dataoffset > svlen)	652	if (!SvOK (length) || len + dataoffset > svlen)
594	length = svlen - dataoffset;	653	len = svlen - dataoffset;
595	}	654	}
596	else	655	else
597	{	656	{
598	/* read: grow scalar as necessary */	657	/* read: grow scalar as necessary */
599	svptr = SvGROW (data, length + dataoffset);	658	svptr = SvGROW (data, len + dataoffset + 1);
600	}	659	}
601		660
602	if (length < 0)	661	if (len < 0)
603	croak ("length must not be negative");	662	croak ("length must not be negative");
604		663
605	{	664	{
606	dREQ;	665	dREQ;
607		666
608	req->type = ix;	667	req->type = ix;
609	req->fh = newSVsv (fh);	668	req->sv1 = newSVsv (fh);
610	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	669	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
611	: IoOFP (sv_2io (fh)));	670	: IoOFP (sv_2io (fh)));
		671	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
612	req->offset = offset;	672	req->size = len;
613	req->length = length;
614	req->data = SvREFCNT_inc (data);	673	req->sv2 = SvREFCNT_inc (data);
615	req->dataptr = (char *)svptr + dataoffset;	674	req->ptr2 = (char *)svptr + dataoffset;
616	req->callback = SvREFCNT_inc (callback);	675	req->stroffset = dataoffset;
617		676
618	send_req (req);	677	if (!SvREADONLY (data))
		678	{
		679	SvREADONLY_on (data);
		680	req->flags |= FLAG_SV2_RO_OFF;
		681	}
		682
		683	REQ_SEND;
619	}	684	}
620	}	685	}
621		686
622	void	687	void
		688	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		689	PROTOTYPE: $$;$
		690	PPCODE:
		691	{
		692	SV *data;
		693	dREQ;
		694
		695	req->type = EIO_READLINK;
		696	req->sv1 = newSVsv (path);
		697	req->ptr1 = SvPVbyte_nolen (req->sv1);
		698
		699	REQ_SEND;
		700	}
		701
		702	void
		703	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		704	PROTOTYPE: $$$$;$
		705	PPCODE:
		706	{
		707	dREQ;
		708
		709	req->type = EIO_SENDFILE;
		710	req->sv1 = newSVsv (out_fh);
		711	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		712	req->sv2 = newSVsv (in_fh);
		713	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		714	req->offs = SvVAL64 (in_offset);
		715	req->size = length;
		716
		717	REQ_SEND;
		718	}
		719
		720	void
623	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	721	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
624	SV * fh
625	UV offset
626	IV length
627	SV * callback
628	PROTOTYPE: $$$;$	722	PROTOTYPE: $$$;$
629	CODE:	723	PPCODE:
630	{	724	{
631	dREQ;	725	dREQ;
632		726
633	req->type = REQ_READAHEAD;	727	req->type = EIO_READAHEAD;
634	req->fh = newSVsv (fh);	728	req->sv1 = newSVsv (fh);
635	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	729	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
636	req->offset = offset;	730	req->offs = SvVAL64 (offset);
637	req->length = length;	731	req->size = length;
638		732
639	send_req (req);	733	REQ_SEND;
640	}	734	}
641		735
642	void	736	void
643	aio_stat(fh_or_path,callback=&PL_sv_undef)	737	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
644	SV * fh_or_path
645	SV * callback
646	ALIAS:	738	ALIAS:
647	aio_stat = REQ_STAT	739	aio_stat = EIO_STAT
648	aio_lstat = REQ_LSTAT	740	aio_lstat = EIO_LSTAT
649	CODE:	741	PPCODE:
650	{	742	{
651	dREQ;	743	dREQ;
652		744
653	New (0, req->statdata, 1, Stat_t);	745	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		746
657	if (SvPOK (fh_or_path))	747	if (SvPOK (req->sv1))
658	{	748	{
659	req->type = ix;	749	req->type = ix;
660	req->data = newSVsv (fh_or_path);
661	req->dataptr = SvPVbyte_nolen (req->data);	750	req->ptr1 = SvPVbyte_nolen (req->sv1);
662	}	751	}
663	else	752	else
664	{	753	{
665	req->type = REQ_FSTAT;	754	req->type = EIO_FSTAT;
666	req->fh = newSVsv (fh_or_path);
667	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	755	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		756	}
		757
		758	REQ_SEND;
		759	}
		760
		761	void
		762	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		763	PPCODE:
		764	{
		765	dREQ;
		766
		767	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		768	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		769	req->sv1 = newSVsv (fh_or_path);
		770
		771	if (SvPOK (req->sv1))
668	}	772	{
		773	req->type = EIO_UTIME;
		774	req->ptr1 = SvPVbyte_nolen (req->sv1);
		775	}
		776	else
		777	{
		778	req->type = EIO_FUTIME;
		779	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		780	}
669		781
670	send_req (req);	782	REQ_SEND;
671	}	783	}
672		784
673	void	785	void
		786	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		787	PPCODE:
		788	{
		789	dREQ;
		790
		791	req->sv1 = newSVsv (fh_or_path);
		792	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		793
		794	if (SvPOK (req->sv1))
		795	{
		796	req->type = EIO_TRUNCATE;
		797	req->ptr1 = SvPVbyte_nolen (req->sv1);
		798	}
		799	else
		800	{
		801	req->type = EIO_FTRUNCATE;
		802	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		803	}
		804
		805	REQ_SEND;
		806	}
		807
		808	void
		809	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		810	ALIAS:
		811	aio_chmod = EIO_CHMOD
		812	aio_mkdir = EIO_MKDIR
		813	PPCODE:
		814	{
		815	dREQ;
		816
		817	req->int2 = mode;
		818	req->sv1 = newSVsv (fh_or_path);
		819
		820	if (SvPOK (req->sv1))
		821	{
		822	req->type = ix;
		823	req->ptr1 = SvPVbyte_nolen (req->sv1);
		824	}
		825	else
		826	{
		827	req->type = EIO_FCHMOD;
		828	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		829	}
		830
		831	REQ_SEND;
		832	}
		833
		834	void
		835	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		836	PPCODE:
		837	{
		838	dREQ;
		839
		840	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		841	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		842	req->sv1 = newSVsv (fh_or_path);
		843
		844	if (SvPOK (req->sv1))
		845	{
		846	req->type = EIO_CHOWN;
		847	req->ptr1 = SvPVbyte_nolen (req->sv1);
		848	}
		849	else
		850	{
		851	req->type = EIO_FCHOWN;
		852	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		853	}
		854
		855	REQ_SEND;
		856	}
		857
		858	void
674	aio_unlink(pathname,callback=&PL_sv_undef)	859	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
675	SV * pathname
676	SV * callback
677	ALIAS:	860	ALIAS:
678	aio_unlink = REQ_UNLINK	861	aio_unlink = EIO_UNLINK
679	aio_rmdir = REQ_RMDIR	862	aio_rmdir = EIO_RMDIR
		863	aio_readdir = EIO_READDIR
680	CODE:	864	PPCODE:
681	{	865	{
682	dREQ;	866	dREQ;
683		867
684	req->type = ix;	868	req->type = ix;
685	req->data = newSVsv (pathname);	869	req->sv1 = newSVsv (pathname);
686	req->dataptr = SvPVbyte_nolen (req->data);	870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871
		872	REQ_SEND;
		873	}
		874
		875	void
		876	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		877	ALIAS:
		878	aio_link = EIO_LINK
		879	aio_symlink = EIO_SYMLINK
		880	aio_rename = EIO_RENAME
		881	PPCODE:
		882	{
		883	dREQ;
687		884
688	send_req (req);	885	req->type = ix;
689	}	886	req->sv1 = newSVsv (oldpath);
690		887	req->ptr1 = SvPVbyte_nolen (req->sv1);
691	void	888	req->sv2 = newSVsv (newpath);
692	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	889	req->ptr2 = SvPVbyte_nolen (req->sv2);
693	SV * oldpath
694	SV * newpath
695	SV * callback
696	CODE:
697	{
698	dREQ;
699		890
700	req->type = REQ_SYMLINK;	891	REQ_SEND;
701	req->fh = newSVsv (oldpath);	892	}
702	req->data2ptr = SvPVbyte_nolen (req->fh);	893
703	req->data = newSVsv (newpath);	894	void
704	req->dataptr = SvPVbyte_nolen (req->data);	895	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		896	PPCODE:
		897	{
		898	dREQ;
705		899
706	send_req (req);	900	req->type = EIO_MKNOD;
		901	req->sv1 = newSVsv (pathname);
		902	req->ptr1 = SvPVbyte_nolen (req->sv1);
		903	req->int2 = (mode_t)mode;
		904	req->offs = dev;
		905
		906	REQ_SEND;
707	}	907	}
708		908
709	void	909	void
		910	aio_busy (double delay, SV *callback=&PL_sv_undef)
		911	PPCODE:
		912	{
		913	dREQ;
		914
		915	req->type = EIO_BUSY;
		916	req->nv1 = delay < 0. ? 0. : delay;
		917
		918	REQ_SEND;
		919	}
		920
		921	void
		922	aio_group (SV *callback=&PL_sv_undef)
		923	PROTOTYPE: ;$
		924	PPCODE:
		925	{
		926	dREQ;
		927
		928	req->type = EIO_GROUP;
		929
		930	req_submit (req);
		931	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		932	}
		933
		934	void
		935	aio_nop (SV *callback=&PL_sv_undef)
		936	ALIAS:
		937	aio_nop = EIO_NOP
		938	aio_sync = EIO_SYNC
		939	PPCODE:
		940	{
		941	dREQ;
		942
		943	req->type = ix;
		944
		945	REQ_SEND;
		946	}
		947
		948	int
		949	aioreq_pri (int pri = 0)
		950	PROTOTYPE: ;$
		951	CODE:
		952	RETVAL = next_pri;
		953	if (items > 0)
		954	{
		955	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		956	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		957	next_pri = pri;
		958	}
		959	OUTPUT:
		960	RETVAL
		961
		962	void
		963	aioreq_nice (int nice = 0)
		964	CODE:
		965	nice = next_pri - nice;
		966	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		967	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		968	next_pri = nice;
		969
		970	void
710	flush()	971	flush ()
711	PROTOTYPE:	972	PROTOTYPE:
712	CODE:	973	CODE:
713	while (nreqs)	974	while (eio_nreqs ())
714	{	975	{
715	poll_wait ();	976	poll_wait ();
716	poll_cb ();	977	poll_cb ();
717	}	978	}
718		979
719	void	980	int
720	poll()	981	poll()
721	PROTOTYPE:	982	PROTOTYPE:
722	CODE:	983	CODE:
723	if (nreqs)
724	{
725	poll_wait ();	984	poll_wait ();
726	poll_cb ();	985	RETVAL = poll_cb ();
727	}	986	OUTPUT:
		987	RETVAL
728		988
729	int	989	int
730	poll_fileno()	990	poll_fileno()
731	PROTOTYPE:	991	PROTOTYPE:
732	CODE:	992	CODE:
…		…
744		1004
745	void	1005	void
746	poll_wait()	1006	poll_wait()
747	PROTOTYPE:	1007	PROTOTYPE:
748	CODE:	1008	CODE:
749	if (nreqs)
750	poll_wait ();	1009	poll_wait ();
751		1010
752	int	1011	int
753	nreqs()	1012	nreqs()
754	PROTOTYPE:	1013	PROTOTYPE:
755	CODE:	1014	CODE:
756	RETVAL = nreqs;	1015	RETVAL = eio_nreqs ();
757	OUTPUT:	1016	OUTPUT:
758	RETVAL	1017	RETVAL
759		1018
		1019	int
		1020	nready()
		1021	PROTOTYPE:
		1022	CODE:
		1023	RETVAL = eio_nready ();
		1024	OUTPUT:
		1025	RETVAL
		1026
		1027	int
		1028	npending()
		1029	PROTOTYPE:
		1030	CODE:
		1031	RETVAL = eio_npending ();
		1032	OUTPUT:
		1033	RETVAL
		1034
		1035	int
		1036	nthreads()
		1037	PROTOTYPE:
		1038	CODE:
		1039	RETVAL = eio_nthreads ();
		1040	OUTPUT:
		1041	RETVAL
		1042
		1043	void _on_next_submit (SV *cb)
		1044	CODE:
		1045	SvREFCNT_dec (on_next_submit);
		1046	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1047
		1048	PROTOTYPES: DISABLE
		1049
		1050	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1051
		1052	void
		1053	cancel (aio_req_ornot req)
		1054	CODE:
		1055	eio_cancel (req);
		1056
		1057	void
		1058	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1059	PPCODE:
		1060	{
		1061	if (GIMME_V != G_VOID)
		1062	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1063
		1064	if (items > 1)
		1065	{
		1066	SV *cb_cv = get_cb (callback);
		1067
		1068	SvREFCNT_dec (req->callback);
		1069	req->callback = SvREFCNT_inc (cb_cv);
		1070	}
		1071	}
		1072
		1073	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1074
		1075	void
		1076	add (aio_req grp, ...)
		1077	PPCODE:
		1078	{
		1079	int i;
		1080
		1081	if (grp->int1 == 2)
		1082	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1083
		1084	for (i = 1; i < items; ++i )
		1085	{
		1086	aio_req req;
		1087
		1088	if (GIMME_V != G_VOID)
		1089	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1090
		1091	req = SvAIO_REQ (ST (i));
		1092
		1093	if (req)
		1094	eio_grp_add (grp, req);
		1095	}
		1096	}
		1097
		1098	void
		1099	cancel_subs (aio_req_ornot req)
		1100	CODE:
		1101	req_cancel_subs (req);
		1102
		1103	void
		1104	result (aio_req grp, ...)
		1105	CODE:
		1106	{
		1107	int i;
		1108	AV *av;
		1109
		1110	grp->errorno = errno;
		1111
		1112	av = newAV ();
		1113
		1114	for (i = 1; i < items; ++i )
		1115	av_push (av, newSVsv (ST (i)));
		1116
		1117	SvREFCNT_dec (grp->sv1);
		1118	grp->sv1 = (SV *)av;
		1119	}
		1120
		1121	void
		1122	errno (aio_req grp, int errorno = errno)
		1123	CODE:
		1124	grp->errorno = errorno;
		1125
		1126	void
		1127	limit (aio_req grp, int limit)
		1128	CODE:
		1129	eio_grp_limit (grp, limit);
		1130
		1131	void
		1132	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1133	CODE:
		1134	{
		1135	SvREFCNT_dec (grp->sv2);
		1136	grp->sv2 = newSVsv (callback);
		1137	grp->feed = aio_grp_feed;
		1138
		1139	if (grp->int2 <= 0)
		1140	grp->int2 = 2;
		1141
		1142	eio_grp_limit (grp, grp->int2);
		1143	}
		1144

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