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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 1.128 by root, Tue Sep 30 14:07:59 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	int do_croak = 0;
92	aio_req req, prv;
93		215
94	pthread_mutex_lock (&reslock);	216	if (req->flags & FLAG_SV2_RO_OFF)
		217	SvREADONLY_off (req->sv2);
95		218
96	{	219	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	{	220	{
110	nreqs--;	221	ENTER;
		222	SAVETMPS;
		223	PUSHMARK (SP);
		224	EXTEND (SP, 1);
111		225
112	if (req->type == REQ_QUIT)	226	switch (req->type)
113	started--;
114	else
115	{	227	{
116	int errorno = errno;	228	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	{	229	{
131	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	230	SV *rv = &PL_sv_undef;
132	PL_laststatval = req->result;
133	PL_statcache = *(req->statdata);
134		231
135	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);
136	}	252	}
		253	break;
137		254
138	ENTER;	255	case EIO_OPEN:
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141
142	if (req->type == REQ_OPEN)
143	{	256	{
144	/* convert fd to fh */	257	/* convert fd to fh */
145	SV *fh;	258	SV *fh = &PL_sv_undef;
146		259
147	PUTBACK;	260	if (req->result >= 0)
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	261	{
149	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);
150		269
151	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	);
152		277
		278	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		279	fh = (SV *)gv;
		280	}
		281
153	PUSHMARK (SP);	282	PUSHs (fh);
154	XPUSHs (sv_2mortal (fh));
155	}	283	}
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;	284	break;
411		285
412	pthread_cond_wait (&reqwait, &reqlock);	286	case EIO_GROUP:
413	}	287	req->int1 = 2; /* mark group as finished */
414		288
415	pthread_mutex_unlock (&reqlock);	289	if (req->sv1)
416
417	errno = 0; /* strictly unnecessary */
418
419	type = req->type;
420
421	switch (type)
422	{	290	{
423	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	291	int i;
424	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	292	AV *av = (AV *)req->sv1;
425		293
426	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	294	EXTEND (SP, AvFILL (av) + 1);
427		295	for (i = 0; i <= AvFILL (av); ++i)
428	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	296	PUSHs (*av_fetch (av, i, 0));
429	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	297	}
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;	298	break;
443		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
444	default:	329	default:
445	req->result = ENOSYS;	330	PUSHs (sv_2mortal (newSViv (req->result)));
446	break;	331	break;
447	}	332	}
448		333
449	req->errorno = errno;	334	errno = req->errorno;
450		335
451	pthread_mutex_lock (&reslock);	336	PUTBACK;
		337	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		338	SPAGAIN;
452		339
453	req->next = 0;	340	FREETMPS;
		341	LEAVE;
454		342
455	if (rese)	343	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	}	344	}
470	while (type != REQ_QUIT);
471		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))
472	return 0;	474	return 0;
		475
		476	cv = sv_2cv (cb_sv, &st, &gvp, 0);
		477
		478	if (!cv)
		479	croak ("IO::AIO watcher callback must be undef or a CODE reference");
		480
		481	return (SV *)cv;
473	}	482	}
474		483
475	#define dREQ \	484	#define dREQ \
		485	SV *cb_cv; \
476	aio_req req; \	486	aio_req req; \
		487	int req_pri = next_pri; \
		488	next_pri = EIO_PRI_DEFAULT; \
477	\	489	\
478	if (SvOK (callback) && !SvROK (callback)) \	490	cb_cv = get_cb (callback); \
479	croak ("clalback must be undef or of reference type"); \
480	\	491	\
481	Newz (0, req, 1, aio_cb); \	492	Newz (0, req, 1, eio_req); \
482	if (!req) \	493	if (!req) \
483	croak ("out of memory during aio_req allocation"); \	494	croak ("out of memory during eio_req allocation"); \
484	\	495	\
485	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));
486		506
487	MODULE = IO::AIO PACKAGE = IO::AIO	507	MODULE = IO::AIO PACKAGE = IO::AIO
488		508
489	PROTOTYPES: ENABLE	509	PROTOTYPES: ENABLE
490		510
491	BOOT:	511	BOOT:
492	{	512	{
493	if (pipe (respipe))	513	stash = gv_stashpv ("IO::AIO", 1);
494	croak ("unable to initialize result pipe");
495		514
496	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	515	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
497	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
498		523
499	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	524	create_respipe ();
500	croak ("cannot set result pipe to nonblocking mode");
501		525
502	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	526	if (eio_init (want_poll, done_poll) < 0)
503	}	527	croak ("IO::AIO: unable to initialise eio library");
504		528
		529	/* atfork child called in fifo order, so before eio's handler */
		530	X_THREAD_ATFORK (0, 0, atfork_child);
		531	}
		532
505	void	533	void
506	min_parallel(nthreads)	534	max_poll_reqs (int nreqs)
507	int nthreads
508	PROTOTYPE: $	535	PROTOTYPE: $
		536	CODE:
		537	eio_set_max_poll_reqs (nreqs);
509		538
510	void	539	void
511	max_parallel(nthreads)	540	max_poll_time (double nseconds)
512	int nthreads
513	PROTOTYPE: $	541	PROTOTYPE: $
514
515	int
516	max_outstanding(nreqs)
517	int nreqs
518	PROTOTYPE: $
519	CODE:	542	CODE:
520	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:
521	max_outstanding = nreqs;	567	max_outstanding = maxreqs;
522		568
523	void	569	void
524	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	570	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: $$$;$	571	PROTOTYPE: $$$;$
530	CODE:	572	PPCODE:
531	{	573	{
532	dREQ;	574	dREQ;
533		575
534	req->type = REQ_OPEN;	576	req->type = EIO_OPEN;
535	req->data = newSVsv (pathname);	577	req->sv1 = newSVsv (pathname);
536	req->dataptr = SvPVbyte_nolen (req->data);	578	req->ptr1 = SvPVbyte_nolen (req->sv1);
537	req->fd = flags;	579	req->int1 = flags;
538	req->mode = mode;	580	req->int2 = mode;
539		581
540	send_req (req);	582	REQ_SEND;
541	}	583	}
542		584
543	void	585	void
544	aio_close(fh,callback=&PL_sv_undef)	586	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
545	SV * fh
546	SV * callback
547	PROTOTYPE: $;$	587	PROTOTYPE: $;$
548	ALIAS:	588	ALIAS:
549	aio_close = REQ_CLOSE
550	aio_fsync = REQ_FSYNC	589	aio_fsync = EIO_FSYNC
551	aio_fdatasync = REQ_FDATASYNC	590	aio_fdatasync = EIO_FDATASYNC
552	CODE:	591	PPCODE:
553	{	592	{
554	dREQ;	593	dREQ;
555		594
556	req->type = ix;	595	req->type = ix;
557	req->fh = newSVsv (fh);	596	req->sv1 = newSVsv (fh);
558	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	597	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
559		598
560	send_req (req);	599	REQ_SEND (req);
561	}	600	}
562		601
563	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
564	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)
565	SV * fh
566	UV offset
567	IV length
568	SV * data
569	IV dataoffset
570	SV * callback
571	ALIAS:	632	ALIAS:
572	aio_read = REQ_READ	633	aio_read = EIO_READ
573	aio_write = REQ_WRITE	634	aio_write = EIO_WRITE
574	PROTOTYPE: $$$$$;$	635	PROTOTYPE: $$$$$;$
575	CODE:	636	PPCODE:
576	{	637	{
577	aio_req req;
578	STRLEN svlen;	638	STRLEN svlen;
579	char *svptr = SvPVbyte (data, svlen);	639	char *svptr = SvPVbyte (data, svlen);
		640	UV len = SvUV (length);
580		641
581	SvUPGRADE (data, SVt_PV);	642	SvUPGRADE (data, SVt_PV);
582	SvPOK_on (data);	643	SvPOK_on (data);
583		644
584	if (dataoffset < 0)	645	if (dataoffset < 0)
585	dataoffset += svlen;	646	dataoffset += svlen;
586		647
587	if (dataoffset < 0 || dataoffset > svlen)	648	if (dataoffset < 0 || dataoffset > svlen)
588	croak ("data offset outside of string");	649	croak ("dataoffset outside of data scalar");
589		650
590	if (ix == REQ_WRITE)	651	if (ix == EIO_WRITE)
591	{	652	{
592	/* write: check length and adjust. */	653	/* write: check length and adjust. */
593	if (length < 0 || length + dataoffset > svlen)	654	if (!SvOK (length) || len + dataoffset > svlen)
594	length = svlen - dataoffset;	655	len = svlen - dataoffset;
595	}	656	}
596	else	657	else
597	{	658	{
598	/* read: grow scalar as necessary */	659	/* read: grow scalar as necessary */
599	svptr = SvGROW (data, length + dataoffset);	660	svptr = SvGROW (data, len + dataoffset + 1);
600	}	661	}
601		662
602	if (length < 0)	663	if (len < 0)
603	croak ("length must not be negative");	664	croak ("length must not be negative");
604		665
605	{	666	{
606	dREQ;	667	dREQ;
607		668
608	req->type = ix;	669	req->type = ix;
609	req->fh = newSVsv (fh);	670	req->sv1 = newSVsv (fh);
610	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	671	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
611	: IoOFP (sv_2io (fh)));	672	: IoOFP (sv_2io (fh)));
		673	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
612	req->offset = offset;	674	req->size = len;
613	req->length = length;
614	req->data = SvREFCNT_inc (data);	675	req->sv2 = SvREFCNT_inc (data);
615	req->dataptr = (char *)svptr + dataoffset;	676	req->ptr2 = (char *)svptr + dataoffset;
616	req->callback = SvREFCNT_inc (callback);	677	req->stroffset = dataoffset;
617		678
618	send_req (req);	679	if (!SvREADONLY (data))
		680	{
		681	SvREADONLY_on (data);
		682	req->flags |= FLAG_SV2_RO_OFF;
		683	}
		684
		685	REQ_SEND;
619	}	686	}
620	}	687	}
621		688
622	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: $$$$;$
		707	PPCODE:
		708	{
		709	dREQ;
		710
		711	req->type = EIO_SENDFILE;
		712	req->sv1 = newSVsv (out_fh);
		713	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		714	req->sv2 = newSVsv (in_fh);
		715	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		716	req->offs = SvVAL64 (in_offset);
		717	req->size = length;
		718
		719	REQ_SEND;
		720	}
		721
		722	void
623	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	723	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
624	SV * fh
625	UV offset
626	IV length
627	SV * callback
628	PROTOTYPE: $$$;$	724	PROTOTYPE: $$$;$
629	CODE:	725	PPCODE:
630	{	726	{
631	dREQ;	727	dREQ;
632		728
633	req->type = REQ_READAHEAD;	729	req->type = EIO_READAHEAD;
634	req->fh = newSVsv (fh);	730	req->sv1 = newSVsv (fh);
635	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	731	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
636	req->offset = offset;	732	req->offs = SvVAL64 (offset);
637	req->length = length;	733	req->size = length;
638		734
639	send_req (req);	735	REQ_SEND;
640	}	736	}
641		737
642	void	738	void
643	aio_stat(fh_or_path,callback=&PL_sv_undef)	739	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
644	SV * fh_or_path
645	SV * callback
646	ALIAS:	740	ALIAS:
647	aio_stat = REQ_STAT	741	aio_stat = EIO_STAT
648	aio_lstat = REQ_LSTAT	742	aio_lstat = EIO_LSTAT
649	CODE:	743	PPCODE:
650	{	744	{
651	dREQ;	745	dREQ;
652		746
653	New (0, req->statdata, 1, Stat_t);	747	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		748
657	if (SvPOK (fh_or_path))	749	if (SvPOK (req->sv1))
658	{	750	{
659	req->type = ix;	751	req->type = ix;
660	req->data = newSVsv (fh_or_path);
661	req->dataptr = SvPVbyte_nolen (req->data);	752	req->ptr1 = SvPVbyte_nolen (req->sv1);
662	}	753	}
663	else	754	else
664	{	755	{
665	req->type = REQ_FSTAT;	756	req->type = EIO_FSTAT;
666	req->fh = newSVsv (fh_or_path);
667	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))
668	}	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	}
669		783
670	send_req (req);	784	REQ_SEND;
671	}	785	}
672		786
673	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
674	aio_unlink(pathname,callback=&PL_sv_undef)	861	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
675	SV * pathname
676	SV * callback
677	ALIAS:	862	ALIAS:
678	aio_unlink = REQ_UNLINK	863	aio_unlink = EIO_UNLINK
679	aio_rmdir = REQ_RMDIR	864	aio_rmdir = EIO_RMDIR
		865	aio_readdir = EIO_READDIR
680	CODE:	866	PPCODE:
681	{	867	{
682	dREQ;	868	dREQ;
683		869
684	req->type = ix;	870	req->type = ix;
685	req->data = newSVsv (pathname);	871	req->sv1 = newSVsv (pathname);
686	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;
687		886
688	send_req (req);	887	req->type = ix;
689	}	888	req->sv1 = newSVsv (oldpath);
690		889	req->ptr1 = SvPVbyte_nolen (req->sv1);
691	void	890	req->sv2 = newSVsv (newpath);
692	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	891	req->ptr2 = SvPVbyte_nolen (req->sv2);
693	SV * oldpath
694	SV * newpath
695	SV * callback
696	CODE:
697	{
698	dREQ;
699		892
700	req->type = REQ_SYMLINK;	893	REQ_SEND;
701	req->fh = newSVsv (oldpath);	894	}
702	req->data2ptr = SvPVbyte_nolen (req->fh);	895
703	req->data = newSVsv (newpath);	896	void
704	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;
705		901
706	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;
707	}	909	}
708		910
709	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
710	flush()	973	flush ()
711	PROTOTYPE:	974	PROTOTYPE:
712	CODE:	975	CODE:
713	while (nreqs)	976	while (eio_nreqs ())
714	{	977	{
715	poll_wait ();	978	poll_wait ();
716	poll_cb ();	979	poll_cb ();
717	}	980	}
718		981
719	void	982	int
720	poll()	983	poll()
721	PROTOTYPE:	984	PROTOTYPE:
722	CODE:	985	CODE:
723	if (nreqs)
724	{
725	poll_wait ();	986	poll_wait ();
726	poll_cb ();	987	RETVAL = poll_cb ();
727	}	988	OUTPUT:
		989	RETVAL
728		990
729	int	991	int
730	poll_fileno()	992	poll_fileno()
731	PROTOTYPE:	993	PROTOTYPE:
732	CODE:	994	CODE:
…		…
744		1006
745	void	1007	void
746	poll_wait()	1008	poll_wait()
747	PROTOTYPE:	1009	PROTOTYPE:
748	CODE:	1010	CODE:
749	if (nreqs)
750	poll_wait ();	1011	poll_wait ();
751		1012
752	int	1013	int
753	nreqs()	1014	nreqs()
754	PROTOTYPE:	1015	PROTOTYPE:
755	CODE:	1016	CODE:
756	RETVAL = nreqs;	1017	RETVAL = eio_nreqs ();
757	OUTPUT:	1018	OUTPUT:
758	RETVAL	1019	RETVAL
759		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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