[ViewVC] Diff of: cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC vs.
Revision 1.50 by root, Sun Oct 22 21:13:47 2006 UTC

…		…
7		7
8	#include "autoconf/config.h"	8	#include "autoconf/config.h"
9		9
10	#include <pthread.h>	10	#include <pthread.h>
11		11
		12	#include <stddef.h>
		13	#include <errno.h>
		14	#include <sys/time.h>
		15	#include <sys/select.h>
12	#include <sys/types.h>	16	#include <sys/types.h>
13	#include <sys/stat.h>	17	#include <sys/stat.h>
14		18	#include <limits.h>
15	#include <unistd.h>	19	#include <unistd.h>
16	#include <fcntl.h>	20	#include <fcntl.h>
17	#include <signal.h>	21	#include <signal.h>
18	#include <sched.h>	22	#include <sched.h>
19		23
…		…
30	# else	34	# else
31	# error sendfile support requested but not available	35	# error sendfile support requested but not available
32	# endif	36	# endif
33	#endif	37	#endif
34		38
		39	/* used for struct dirent, AIX doesn't provide it */
		40	#ifndef NAME_MAX
		41	# define NAME_MAX 4096
		42	#endif
		43
35	#if __ia64	44	#if __ia64
36	# define STACKSIZE 65536	45	# define STACKSIZE 65536
37	#else	46	#else
38	# define STACKSIZE 4096	47	# define STACKSIZE 8192
39	#endif	48	#endif
40		49
41	enum {	50	enum {
42	REQ_QUIT,	51	REQ_QUIT,
43	REQ_OPEN, REQ_CLOSE,	52	REQ_OPEN, REQ_CLOSE,
44	REQ_READ, REQ_WRITE, REQ_READAHEAD,	53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
45	REQ_SENDFILE,	54	REQ_SENDFILE,
46	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
47	REQ_FSYNC, REQ_FDATASYNC,	56	REQ_FSYNC, REQ_FDATASYNC,
48	REQ_UNLINK, REQ_RMDIR,	57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
49	REQ_SYMLINK,	58	REQ_READDIR,
		59	REQ_LINK, REQ_SYMLINK,
		60	REQ_SLEEP,
		61	REQ_GROUP,
50	};	62	};
51		63
		64	#define AIO_REQ_KLASS "IO::AIO::REQ"
		65	#define AIO_GRP_KLASS "IO::AIO::GRP"
		66
52	typedef struct aio_cb {	67	typedef struct aio_cb
		68	{
53	struct aio_cb *volatile next;	69	struct aio_cb *volatile next;
54		70
55	int type;	71	struct aio_cb grp, grp_prev, grp_next, grp_first;
56		72
57	int fd, fd2;	73	SV self; / the perl counterpart of this request, if any */
		74
		75	SV data, callback;
		76	SV fh, fh2;
		77	void dataptr, data2ptr;
		78	Stat_t *statdata;
58	off_t offset;	79	off_t offset;
59	size_t length;	80	size_t length;
60	ssize_t result;	81	ssize_t result;
		82
		83	int type;
		84	int fd, fd2;
		85	int errorno;
		86	STRLEN dataoffset;
61	mode_t mode; /* open */	87	mode_t mode; /* open */
62	int errorno;	88	unsigned char cancelled;
63	SV data, callback;
64	SV fh, fh2;
65	void dataptr, data2ptr;
66	STRLEN dataoffset;
67
68	Stat_t *statdata;
69	} aio_cb;	89	} aio_cb;
70		90
71	typedef aio_cb *aio_req;	91	typedef aio_cb *aio_req;
		92	typedef aio_cb *aio_req_ornot;
72		93
73	static int started, wanted;	94	static int started, wanted;
74	static volatile int nreqs;	95	static volatile int nreqs;
75	static int max_outstanding = 1<<30;	96	static int max_outstanding = 1<<30;
76	static int respipe [2];	97	static int respipe [2];
…		…
80	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
81		102
82	static volatile aio_req reqs, reqe; /* queue start, queue end */	103	static volatile aio_req reqs, reqe; /* queue start, queue end */
83	static volatile aio_req ress, rese; /* queue start, queue end */	104	static volatile aio_req ress, rese; /* queue start, queue end */
84		105
		106	static void req_invoke (aio_req req);
85	static void free_req (aio_req req)	107	static void req_free (aio_req req);
86	{
87	if (req->data)
88	SvREFCNT_dec (req->data);
89		108
		109	/* must be called at most once */
		110	static SV req_sv (aio_req req, const char klass)
		111	{
90	if (req->fh)	112	if (!req->self)
91	SvREFCNT_dec (req->fh);	113	{
		114	req->self = (SV *)newHV ();
		115	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		116	}
92		117
93	if (req->fh2)	118	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		119	}
		120
		121	static aio_req SvAIO_REQ (SV *sv)
		122	{
		123	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
		124	croak ("object of class " AIO_REQ_KLASS " expected");
		125
		126	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		127
		128	return mg ? (aio_req)mg->mg_ptr : 0;
		129	}
		130
		131	static void aio_grp_feed (aio_req grp)
		132	{
		133	while (grp->length < grp->fd2)
		134	{
		135	int old_len = grp->length;
		136
		137	if (grp->fh2 && SvOK (grp->fh2))
		138	{
		139	dSP;
		140
		141	ENTER;
		142	SAVETMPS;
		143	PUSHMARK (SP);
		144	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		145	PUTBACK;
		146	call_sv (grp->fh2, G_VOID \| G_EVAL);
		147	SPAGAIN;
		148	FREETMPS;
		149	LEAVE;
		150	}
		151
		152	/* stop if no progress has been made */
		153	if (old_len == grp->length)
		154	{
94	SvREFCNT_dec (req->fh2);	155	SvREFCNT_dec (grp->fh2);
95		156	grp->fh2 = 0;
96	if (req->statdata)	157	break;
97	Safefree (req->statdata);	158	}
98		159	}
99	if (req->callback)
100	SvREFCNT_dec (req->callback);
101
102	Safefree (req);
103	}	160	}
104		161
105	static void	162	static void aio_grp_dec (aio_req grp)
106	poll_wait ()	163	{
		164	--grp->length;
		165
		166	/* call feeder, if applicable */
		167	aio_grp_feed (grp);
		168
		169	/* finish, if done */
		170	if (!grp->length && grp->fd)
		171	{
		172	req_invoke (grp);
		173	req_free (grp);
		174	}
		175	}
		176
		177	static void poll_wait ()
107	{	178	{
108	if (nreqs && !ress)	179	if (nreqs && !ress)
109	{	180	{
110	fd_set rfd;	181	fd_set rfd;
111	FD_ZERO(&rfd);	182	FD_ZERO(&rfd);
…		…
113		184
114	select (respipe [0] + 1, &rfd, 0, 0, 0);	185	select (respipe [0] + 1, &rfd, 0, 0, 0);
115	}	186	}
116	}	187	}
117		188
118	static int	189	static void req_invoke (aio_req req)
119	poll_cb ()	190	{
		191	dSP;
		192	int errorno = errno;
		193
		194	if (req->cancelled \|\| !SvOK (req->callback))
		195	return;
		196
		197	errno = req->errorno;
		198
		199	ENTER;
		200	SAVETMPS;
		201	PUSHMARK (SP);
		202	EXTEND (SP, 1);
		203
		204	switch (req->type)
		205	{
		206	case REQ_READDIR:
		207	{
		208	SV *rv = &PL_sv_undef;
		209
		210	if (req->result >= 0)
		211	{
		212	char *buf = req->data2ptr;
		213	AV *av = newAV ();
		214
		215	while (req->result)
		216	{
		217	SV *sv = newSVpv (buf, 0);
		218
		219	av_push (av, sv);
		220	buf += SvCUR (sv) + 1;
		221	req->result--;
		222	}
		223
		224	rv = sv_2mortal (newRV_noinc ((SV *)av));
		225	}
		226
		227	PUSHs (rv);
		228	}
		229	break;
		230
		231	case REQ_OPEN:
		232	{
		233	/* convert fd to fh */
		234	SV *fh;
		235
		236	PUSHs (sv_2mortal (newSViv (req->result)));
		237	PUTBACK;
		238	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		239	SPAGAIN;
		240
		241	fh = SvREFCNT_inc (POPs);
		242
		243	PUSHMARK (SP);
		244	XPUSHs (sv_2mortal (fh));
		245	}
		246	break;
		247
		248	case REQ_GROUP:
		249	req->fd = 2; /* mark group as finished */
		250
		251	if (req->data)
		252	{
		253	int i;
		254	AV av = (AV )req->data;
		255
		256	EXTEND (SP, AvFILL (av) + 1);
		257	for (i = 0; i <= AvFILL (av); ++i)
		258	PUSHs (*av_fetch (av, i, 0));
		259	}
		260	break;
		261
		262	case REQ_SLEEP:
		263	break;
		264
		265	default:
		266	PUSHs (sv_2mortal (newSViv (req->result)));
		267	break;
		268	}
		269
		270
		271	PUTBACK;
		272	call_sv (req->callback, G_VOID \| G_EVAL);
		273	SPAGAIN;
		274
		275	if (SvTRUE (ERRSV))
		276	{
		277	req_free (req);
		278	croak (0);
		279	}
		280
		281	FREETMPS;
		282	LEAVE;
		283
		284	errno = errorno;
		285	}
		286
		287	static void req_free (aio_req req)
		288	{
		289	if (req->grp)
		290	{
		291	aio_req grp = req->grp;
		292
		293	/* unlink request */
		294	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		295	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		296
		297	if (grp->grp_first == req)
		298	grp->grp_first = req->grp_next;
		299
		300	aio_grp_dec (grp);
		301	}
		302
		303	if (req->self)
		304	{
		305	sv_unmagic (req->self, PERL_MAGIC_ext);
		306	SvREFCNT_dec (req->self);
		307	}
		308
		309	SvREFCNT_dec (req->data);
		310	SvREFCNT_dec (req->fh);
		311	SvREFCNT_dec (req->fh2);
		312	SvREFCNT_dec (req->callback);
		313	Safefree (req->statdata);
		314
		315	if (req->type == REQ_READDIR && req->result >= 0)
		316	free (req->data2ptr);
		317
		318	Safefree (req);
		319	}
		320
		321	static void req_cancel (aio_req req)
		322	{
		323	req->cancelled = 1;
		324
		325	if (req->type == REQ_GROUP)
		326	{
		327	aio_req sub;
		328
		329	for (sub = req->grp_first; sub; sub = sub->grp_next)
		330	req_cancel (sub);
		331	}
		332	}
		333
		334	static int poll_cb ()
120	{	335	{
121	dSP;	336	dSP;
122	int count = 0;	337	int count = 0;
123	int do_croak = 0;	338	int do_croak = 0;
124	aio_req req;	339	aio_req req;
…		…
146	pthread_mutex_unlock (&reslock);	361	pthread_mutex_unlock (&reslock);
147		362
148	if (!req)	363	if (!req)
149	break;	364	break;
150		365
151	nreqs--;	366	--nreqs;
152		367
153	if (req->type == REQ_QUIT)	368	if (req->type == REQ_QUIT)
154	started--;	369	started--;
		370	else if (req->type == REQ_GROUP && req->length)
		371	{
		372	req->fd = 1; /* mark request as delayed */
		373	continue;
		374	}
155	else	375	else
156	{	376	{
157	int errorno = errno;
158	errno = req->errorno;
159
160	if (req->type == REQ_READ)	377	if (req->type == REQ_READ)
161	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	378	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
162		379
163	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))	380	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
164	SvREADONLY_off (req->data);	381	SvREADONLY_off (req->data);
…		…
168	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	385	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
169	PL_laststatval = req->result;	386	PL_laststatval = req->result;
170	PL_statcache = *(req->statdata);	387	PL_statcache = *(req->statdata);
171	}	388	}
172		389
173	ENTER;	390	req_invoke (req);
174	PUSHMARK (SP);
175	XPUSHs (sv_2mortal (newSViv (req->result)));
176		391
177	if (req->type == REQ_OPEN)
178	{
179	/* convert fd to fh */
180	SV *fh;
181
182	PUTBACK;
183	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
184	SPAGAIN;
185
186	fh = SvREFCNT_inc (POPs);
187
188	PUSHMARK (SP);
189	XPUSHs (sv_2mortal (fh));
190	}
191
192	if (SvOK (req->callback))
193	{
194	PUTBACK;
195	call_sv (req->callback, G_VOID \| G_EVAL);
196	SPAGAIN;
197
198	if (SvTRUE (ERRSV))
199	{
200	free_req (req);
201	croak (0);
202	}
203	}
204
205	LEAVE;
206
207	errno = errorno;
208	count++;	392	count++;
209	}	393	}
210		394
211	free_req (req);	395	req_free (req);
212	}	396	}
213		397
214	return count;	398	return count;
215	}	399	}
216		400
217	static void aio_proc(void arg);	401	static void aio_proc(void arg);
218		402
219	static void
220	start_thread (void)	403	static void start_thread (void)
221	{	404	{
222	sigset_t fullsigset, oldsigset;	405	sigset_t fullsigset, oldsigset;
223	pthread_t tid;	406	pthread_t tid;
224	pthread_attr_t attr;	407	pthread_attr_t attr;
225		408
…		…
234	started++;	417	started++;
235		418
236	sigprocmask (SIG_SETMASK, &oldsigset, 0);	419	sigprocmask (SIG_SETMASK, &oldsigset, 0);
237	}	420	}
238		421
239	static void	422	static void req_send (aio_req req)
240	send_req (aio_req req)
241	{	423	{
242	while (started < wanted && nreqs >= started)	424	while (started < wanted && nreqs >= started)
243	start_thread ();	425	start_thread ();
244		426
245	nreqs++;	427	++nreqs;
246		428
247	pthread_mutex_lock (&reqlock);	429	pthread_mutex_lock (&reqlock);
248		430
249	req->next = 0;	431	req->next = 0;
250		432
…		…
269		451
270	poll_wait ();	452	poll_wait ();
271	}	453	}
272	}	454	}
273		455
274	static void	456	static void end_thread (void)
275	end_thread (void)
276	{	457	{
277	aio_req req;	458	aio_req req;
278	Newz (0, req, 1, aio_cb);	459	Newz (0, req, 1, aio_cb);
279	req->type = REQ_QUIT;	460	req->type = REQ_QUIT;
280		461
281	send_req (req);	462	req_send (req);
282	}	463	}
283		464
284	static void min_parallel (int nthreads)	465	static void min_parallel (int nthreads)
285	{	466	{
286	if (wanted < nthreads)	467	if (wanted < nthreads)
…		…
316	croak ("cannot set result pipe to nonblocking mode");	497	croak ("cannot set result pipe to nonblocking mode");
317		498
318	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	499	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
319	croak ("cannot set result pipe to nonblocking mode");	500	croak ("cannot set result pipe to nonblocking mode");
320	}	501	}
321
322	static void atfork_prepare (void)
323	{
324	pthread_mutex_lock (&reqlock);
325	pthread_mutex_lock (&reslock);
326	}
327
328	static void atfork_parent (void)
329	{
330	pthread_mutex_unlock (&reslock);
331	pthread_mutex_unlock (&reqlock);
332	}
333
334	static void atfork_child (void)
335	{
336	aio_req prv;
337
338	started = 0;
339
340	while (reqs)
341	{
342	prv = reqs;
343	reqs = prv->next;
344	free_req (prv);
345	}
346
347	reqs = reqe = 0;
348
349	while (ress)
350	{
351	prv = ress;
352	ress = prv->next;
353	free_req (prv);
354	}
355
356	ress = rese = 0;
357
358	close (respipe [0]);
359	close (respipe [1]);
360	create_pipe ();
361
362	atfork_parent ();
363	}
364
365	/* currently noops */
366	#define LOCK_FD(fd) do { } while (0)
367	#define UNLOCK_FD(fd) do { } while (0)
368		502
369	/*****************************************************************************/	503	/*****************************************************************************/
370	/* work around various missing functions */	504	/* work around various missing functions */
371		505
372	#if !HAVE_PREADWRITE	506	#if !HAVE_PREADWRITE
…		…
376	/*	510	/*
377	* make our pread/pwrite safe against themselves, but not against	511	* make our pread/pwrite safe against themselves, but not against
378	* normal read/write by using a mutex. slows down execution a lot,	512	* normal read/write by using a mutex. slows down execution a lot,
379	* but that's your problem, not mine.	513	* but that's your problem, not mine.
380	*/	514	*/
381	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	515	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
382		516
383	static ssize_t	517	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
384	pread (int fd, void *buf, size_t count, off_t offset)
385	{	518	{
386	ssize_t res;	519	ssize_t res;
387	off_t ooffset;	520	off_t ooffset;
388		521
389	LOCK_FD (fd);	522	pthread_mutex_lock (&preadwritelock);
390	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
391	ooffset = lseek (fd, 0, SEEK_CUR);	523	ooffset = lseek (fd, 0, SEEK_CUR);
392	lseek (fd, offset, SEEK_SET);	524	lseek (fd, offset, SEEK_SET);
393	res = read (fd, buf, count);	525	res = read (fd, buf, count);
394	lseek (fd, ooffset, SEEK_SET);	526	lseek (fd, ooffset, SEEK_SET);
395	pthread_mutex_unlock (&iolock);	527	pthread_mutex_unlock (&preadwritelock);
396	UNLOCK_FD (d);
397		528
398	return res;	529	return res;
399	}	530	}
400		531
401	static ssize_t
402	pwrite (int fd, void *buf, size_t count, off_t offset)	532	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
403	{	533	{
404	ssize_t res;	534	ssize_t res;
405	off_t ooffset;	535	off_t ooffset;
406		536
407	LOCK_FD (fd);	537	pthread_mutex_lock (&preadwritelock);
408	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
409	ooffset = lseek (fd, 0, SEEK_CUR);	538	ooffset = lseek (fd, 0, SEEK_CUR);
410	lseek (fd, offset, SEEK_SET);	539	lseek (fd, offset, SEEK_SET);
411	res = write (fd, buf, count);	540	res = write (fd, buf, count);
412	lseek (fd, offset, SEEK_SET);	541	lseek (fd, offset, SEEK_SET);
413	pthread_mutex_unlock (&iolock);	542	pthread_mutex_unlock (&preadwritelock);
414	UNLOCK_FD (d);
415		543
416	return res;	544	return res;
417	}	545	}
418	#endif	546	#endif
419		547
…		…
422	#endif	550	#endif
423		551
424	#if !HAVE_READAHEAD	552	#if !HAVE_READAHEAD
425	# define readahead aio_readahead	553	# define readahead aio_readahead
426		554
		555	static ssize_t readahead (int fd, off_t offset, size_t count)
		556	{
427	static char readahead_buf[4096];	557	char readahead_buf[4096];
428		558
429	static ssize_t
430	readahead (int fd, off_t offset, size_t count)
431	{
432	while (count > 0)	559	while (count > 0)
433	{	560	{
434	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	561	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
435		562
436	pread (fd, readahead_buf, len, offset);	563	pread (fd, readahead_buf, len, offset);
…		…
440		567
441	errno = 0;	568	errno = 0;
442	}	569	}
443	#endif	570	#endif
444		571
		572	#if !HAVE_READDIR_R
		573	# define readdir_r aio_readdir_r
		574
		575	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		576
		577	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
		578	{
		579	struct dirent *e;
		580	int errorno;
		581
		582	pthread_mutex_lock (&readdirlock);
		583
		584	e = readdir (dirp);
		585	errorno = errno;
		586
		587	if (e)
		588	{
		589	*res = ent;
		590	strcpy (ent->d_name, e->d_name);
		591	}
		592	else
		593	*res = 0;
		594
		595	pthread_mutex_unlock (&readdirlock);
		596
		597	errno = errorno;
		598	return e ? 0 : -1;
		599	}
		600	#endif
		601
445	/* sendfile always needs emulation */	602	/* sendfile always needs emulation */
446	static ssize_t
447	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	603	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
448	{	604	{
449	ssize_t res;	605	ssize_t res;
450		606
451	if (!count)	607	if (!count)
452	return 0;	608	return 0;
453
454	LOCK_FD (ofd);
455		609
456	#if HAVE_SENDFILE	610	#if HAVE_SENDFILE
457	# if __linux	611	# if __linux
458	res = sendfile (ofd, ifd, &offset, count);	612	res = sendfile (ofd, ifd, &offset, count);
459		613
460	# elif __freebsd	614	# elif __freebsd
461	/*	615	/*
462	* Of course, the freebsd sendfile is a dire hack with no thoughts	616	* Of course, the freebsd sendfile is a dire hack with no thoughts
463	* wasted on making it similar to other I/O functions.	617	* wasted on making it similar to other I/O functions.
464	*/	618	*/
465	{	619	{
466	off_t sbytes;	620	off_t sbytes;
467	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	621	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
468		622
469	if (res < 0 && sbytes)	623	if (res < 0 && sbytes)
470	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	624	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
471	res = sbytes;	625	res = sbytes;
472	}	626	}
473		627
474	# elif __hpux	628	# elif __hpux
475	res = sendfile (ofd, ifd, offset, count, 0, 0);	629	res = sendfile (ofd, ifd, offset, count, 0, 0);
476		630
477	# elif __solaris	631	# elif __solaris
478	{	632	{
479	struct sendfilevec vec;	633	struct sendfilevec vec;
480	size_t sbytes;	634	size_t sbytes;
481		635
482	vec.sfv_fd = ifd;	636	vec.sfv_fd = ifd;
483	vec.sfv_flag = 0;	637	vec.sfv_flag = 0;
484	vec.sfv_off = offset;	638	vec.sfv_off = offset;
485	vec.sfv_len = count;	639	vec.sfv_len = count;
486		640
487	res = sendfilev (ofd, &vec, 1, &sbytes);	641	res = sendfilev (ofd, &vec, 1, &sbytes);
488		642
489	if (res < 0 && sbytes)	643	if (res < 0 && sbytes)
490	res = sbytes;	644	res = sbytes;
491	}	645	}
492		646
493	# else
494	res = -1;
495	errno = ENOSYS;
496	# endif	647	# endif
		648	#else
		649	res = -1;
		650	errno = ENOSYS;
497	#endif	651	#endif
498		652
499	if (res < 0	653	if (res < 0
500	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK	654	&& (errno == ENOSYS \|\| errno == EINVAL \|\| errno == ENOTSOCK
501	#if __solaris	655	#if __solaris
502	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE	656	\|\| errno == EAFNOSUPPORT \|\| errno == EPROTOTYPE
503	#endif	657	#endif
504	)	658	)
505	)	659	)
506	{	660	{
507	/* emulate sendfile. this is a major pain in the ass */	661	/* emulate sendfile. this is a major pain in the ass */
508	char *buf = malloc (4096);	662	char buf[4096];
509	res = 0;	663	res = 0;
510		664
511	for (;;)	665	while (count)
512	{	666	{
513	ssize_t cnt;	667	ssize_t cnt;
514		668
515	cnt = pread (ifd, buf, 4096, offset);	669	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
516		670
517	if (cnt <= 0)	671	if (cnt <= 0)
518	{	672	{
519	if (cnt && !res) res = -1;	673	if (cnt && !res) res = -1;
520	break;	674	break;
521	}	675	}
522		676
523	cnt = write (ofd, buf, cnt);	677	cnt = write (ofd, buf, cnt);
524		678
525	if (cnt <= 0)	679	if (cnt <= 0)
526	{	680	{
527	if (cnt && !res) res = -1;	681	if (cnt && !res) res = -1;
528	break;	682	break;
529	}	683	}
530		684
531	offset += cnt;	685	offset += cnt;
532	res += cnt;	686	res += cnt;
		687	count -= cnt;
533	}	688	}
534
535	{
536	int errorno = errno;
537	free (buf);
538	errno = errorno;
539	}
540	}	689	}
541		690
542	UNLOCK_FD (ofd);
543
544	return res;	691	return res;
		692	}
		693
		694	/* read a full directory */
		695	static int scandir_ (const char path, void *namesp)
		696	{
		697	DIR *dirp = opendir (path);
		698	union
		699	{
		700	struct dirent d;
		701	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		702	} u;
		703	struct dirent *entp;
		704	char name, names;
		705	int memlen = 4096;
		706	int memofs = 0;
		707	int res = 0;
		708	int errorno;
		709
		710	if (!dirp)
		711	return -1;
		712
		713	names = malloc (memlen);
		714
		715	for (;;)
		716	{
		717	errno = 0, readdir_r (dirp, &u.d, &entp);
		718
		719	if (!entp)
		720	break;
		721
		722	name = entp->d_name;
		723
		724	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
		725	{
		726	int len = strlen (name) + 1;
		727
		728	res++;
		729
		730	while (memofs + len > memlen)
		731	{
		732	memlen *= 2;
		733	names = realloc (names, memlen);
		734	if (!names)
		735	break;
		736	}
		737
		738	memcpy (names + memofs, name, len);
		739	memofs += len;
		740	}
		741	}
		742
		743	errorno = errno;
		744	closedir (dirp);
		745
		746	if (errorno)
		747	{
		748	free (names);
		749	errno = errorno;
		750	res = -1;
		751	}
		752
		753	namesp = (void )names;
		754	return res;
545	}	755	}
546		756
547	/*****************************************************************************/	757	/*****************************************************************************/
548		758
549	static void *
550	aio_proc (void *thr_arg)	759	static void aio_proc (void thr_arg)
551	{	760	{
552	aio_req req;	761	aio_req req;
553	int type;	762	int type;
554		763
555	do	764	do
…		…
574		783
575	pthread_mutex_unlock (&reqlock);	784	pthread_mutex_unlock (&reqlock);
576		785
577	errno = 0; /* strictly unnecessary */	786	errno = 0; /* strictly unnecessary */
578		787
579	type = req->type;	788	if (!req->cancelled)
580		789	switch (type = req->type) /* remember type for QUIT check */
581	switch (type)
582	{	790	{
583	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	791	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
584	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	792	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
585		793
586	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	794	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
587	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	795	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
588		796
589	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	797	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
590	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	798	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
591	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	799	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
592		800
593	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	801	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
594	case REQ_CLOSE: req->result = close (req->fd); break;	802	case REQ_CLOSE: req->result = close (req->fd); break;
595	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	803	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
596	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	804	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		805	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		806	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
597	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	807	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
598		808
599	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	809	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
600	case REQ_FSYNC: req->result = fsync (req->fd); break;	810	case REQ_FSYNC: req->result = fsync (req->fd); break;
		811	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
601		812
		813	case REQ_SLEEP:
		814	{
		815	struct timeval tv;
		816
		817	tv.tv_sec = req->fd;
		818	tv.tv_usec = req->fd2;
		819
		820	req->result = select (0, 0, 0, 0, &tv);
		821	}
		822
602	case REQ_QUIT:	823	case REQ_QUIT:
603	break;	824	break;
604		825
605	default:	826	default:
606	req->result = ENOSYS;	827	req->result = ENOSYS;
607	break;	828	break;
608	}	829	}
609		830
610	req->errorno = errno;	831	req->errorno = errno;
611		832
612	pthread_mutex_lock (&reslock);	833	pthread_mutex_lock (&reslock);
613		834
…		…
631	while (type != REQ_QUIT);	852	while (type != REQ_QUIT);
632		853
633	return 0;	854	return 0;
634	}	855	}
635		856
		857	/*****************************************************************************/
		858
		859	static void atfork_prepare (void)
		860	{
		861	pthread_mutex_lock (&reqlock);
		862	pthread_mutex_lock (&reslock);
		863	#if !HAVE_PREADWRITE
		864	pthread_mutex_lock (&preadwritelock);
		865	#endif
		866	#if !HAVE_READDIR_R
		867	pthread_mutex_lock (&readdirlock);
		868	#endif
		869	}
		870
		871	static void atfork_parent (void)
		872	{
		873	#if !HAVE_READDIR_R
		874	pthread_mutex_unlock (&readdirlock);
		875	#endif
		876	#if !HAVE_PREADWRITE
		877	pthread_mutex_unlock (&preadwritelock);
		878	#endif
		879	pthread_mutex_unlock (&reslock);
		880	pthread_mutex_unlock (&reqlock);
		881	}
		882
		883	static void atfork_child (void)
		884	{
		885	aio_req prv;
		886
		887	started = 0;
		888
		889	while (reqs)
		890	{
		891	prv = reqs;
		892	reqs = prv->next;
		893	req_free (prv);
		894	}
		895
		896	reqs = reqe = 0;
		897
		898	while (ress)
		899	{
		900	prv = ress;
		901	ress = prv->next;
		902	req_free (prv);
		903	}
		904
		905	ress = rese = 0;
		906
		907	close (respipe [0]);
		908	close (respipe [1]);
		909	create_pipe ();
		910
		911	atfork_parent ();
		912	}
		913
636	#define dREQ \	914	#define dREQ \
637	aio_req req; \	915	aio_req req; \
638	\	916	\
639	if (SvOK (callback) && !SvROK (callback)) \	917	if (SvOK (callback) && !SvROK (callback)) \
640	croak ("clalback must be undef or of reference type"); \	918	croak ("callback must be undef or of reference type"); \
641	\	919	\
642	Newz (0, req, 1, aio_cb); \	920	Newz (0, req, 1, aio_cb); \
643	if (!req) \	921	if (!req) \
644	croak ("out of memory during aio_req allocation"); \	922	croak ("out of memory during aio_req allocation"); \
645	\	923	\
646	req->callback = newSVsv (callback);	924	req->callback = newSVsv (callback)
		925
		926	#define REQ_SEND \
		927	req_send (req); \
		928	\
		929	if (GIMME_V != G_VOID) \
		930	XPUSHs (req_sv (req, AIO_REQ_KLASS));
647		931
648	MODULE = IO::AIO PACKAGE = IO::AIO	932	MODULE = IO::AIO PACKAGE = IO::AIO
649		933
650	PROTOTYPES: ENABLE	934	PROTOTYPES: ENABLE
651		935
652	BOOT:	936	BOOT:
653	{	937	{
		938	HV *stash = gv_stashpv ("IO::AIO", 1);
		939	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		940	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		941	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		942
654	create_pipe ();	943	create_pipe ();
655	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	944	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
656	}	945	}
657		946
658	void	947	void
659	min_parallel(nthreads)	948	min_parallel (nthreads)
660	int nthreads	949	int nthreads
661	PROTOTYPE: $	950	PROTOTYPE: $
662		951
663	void	952	void
664	max_parallel(nthreads)	953	max_parallel (nthreads)
665	int nthreads	954	int nthreads
666	PROTOTYPE: $	955	PROTOTYPE: $
667		956
668	int	957	int
669	max_outstanding(nreqs)	958	max_outstanding (nreqs)
670	int nreqs	959	int nreqs
671	PROTOTYPE: $	960	PROTOTYPE: $
672	CODE:	961	CODE:
673	RETVAL = max_outstanding;	962	RETVAL = max_outstanding;
674	max_outstanding = nreqs;	963	max_outstanding = nreqs;
675		964
676	void	965	void
677	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	966	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
678	SV * pathname	967	SV * pathname
679	int flags	968	int flags
680	int mode	969	int mode
681	SV * callback	970	SV * callback
682	PROTOTYPE: $$$;$	971	PROTOTYPE: $$$;$
683	CODE:	972	PPCODE:
684	{	973	{
685	dREQ;	974	dREQ;
686		975
687	req->type = REQ_OPEN;	976	req->type = REQ_OPEN;
688	req->data = newSVsv (pathname);	977	req->data = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	978	req->dataptr = SvPVbyte_nolen (req->data);
690	req->fd = flags;	979	req->fd = flags;
691	req->mode = mode;	980	req->mode = mode;
692		981
693	send_req (req);	982	REQ_SEND;
694	}	983	}
695		984
696	void	985	void
697	aio_close(fh,callback=&PL_sv_undef)	986	aio_close (fh,callback=&PL_sv_undef)
698	SV * fh	987	SV * fh
699	SV * callback	988	SV * callback
700	PROTOTYPE: $;$	989	PROTOTYPE: $;$
701	ALIAS:	990	ALIAS:
702	aio_close = REQ_CLOSE	991	aio_close = REQ_CLOSE
703	aio_fsync = REQ_FSYNC	992	aio_fsync = REQ_FSYNC
704	aio_fdatasync = REQ_FDATASYNC	993	aio_fdatasync = REQ_FDATASYNC
705	CODE:	994	PPCODE:
706	{	995	{
707	dREQ;	996	dREQ;
708		997
709	req->type = ix;	998	req->type = ix;
710	req->fh = newSVsv (fh);	999	req->fh = newSVsv (fh);
711	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1000	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
712		1001
713	send_req (req);	1002	REQ_SEND (req);
714	}	1003	}
715		1004
716	void	1005	void
717	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1006	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
718	SV * fh	1007	SV * fh
719	UV offset	1008	UV offset
720	UV length	1009	UV length
721	SV * data	1010	SV * data
722	UV dataoffset	1011	UV dataoffset
723	SV * callback	1012	SV * callback
724	ALIAS:	1013	ALIAS:
725	aio_read = REQ_READ	1014	aio_read = REQ_READ
726	aio_write = REQ_WRITE	1015	aio_write = REQ_WRITE
727	PROTOTYPE: $$$$$;$	1016	PROTOTYPE: $$$$$;$
728	CODE:	1017	PPCODE:
729	{	1018	{
730	aio_req req;	1019	aio_req req;
731	STRLEN svlen;	1020	STRLEN svlen;
732	char *svptr = SvPVbyte (data, svlen);	1021	char *svptr = SvPVbyte (data, svlen);
733		1022
…		…
771	{	1060	{
772	SvREADONLY_on (data);	1061	SvREADONLY_on (data);
773	req->data2ptr = (void *)data;	1062	req->data2ptr = (void *)data;
774	}	1063	}
775		1064
776	send_req (req);	1065	REQ_SEND;
777	}	1066	}
778	}	1067	}
779		1068
780	void	1069	void
781	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1070	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
782	SV * out_fh	1071	SV * out_fh
783	SV * in_fh	1072	SV * in_fh
784	UV in_offset	1073	UV in_offset
785	UV length	1074	UV length
786	SV * callback	1075	SV * callback
787	PROTOTYPE: $$$$;$	1076	PROTOTYPE: $$$$;$
788	CODE:	1077	PPCODE:
789	{	1078	{
790	dREQ;	1079	dREQ;
791		1080
792	req->type = REQ_SENDFILE;	1081	req->type = REQ_SENDFILE;
793	req->fh = newSVsv (out_fh);	1082	req->fh = newSVsv (out_fh);
…		…
795	req->fh2 = newSVsv (in_fh);	1084	req->fh2 = newSVsv (in_fh);
796	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1085	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
797	req->offset = in_offset;	1086	req->offset = in_offset;
798	req->length = length;	1087	req->length = length;
799		1088
800	send_req (req);	1089	REQ_SEND;
801	}	1090	}
802		1091
803	void	1092	void
804	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1093	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
805	SV * fh	1094	SV * fh
806	UV offset	1095	UV offset
807	IV length	1096	IV length
808	SV * callback	1097	SV * callback
809	PROTOTYPE: $$$;$	1098	PROTOTYPE: $$$;$
810	CODE:	1099	PPCODE:
811	{	1100	{
812	dREQ;	1101	dREQ;
813		1102
814	req->type = REQ_READAHEAD;	1103	req->type = REQ_READAHEAD;
815	req->fh = newSVsv (fh);	1104	req->fh = newSVsv (fh);
816	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1105	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
817	req->offset = offset;	1106	req->offset = offset;
818	req->length = length;	1107	req->length = length;
819		1108
820	send_req (req);	1109	REQ_SEND;
821	}	1110	}
822		1111
823	void	1112	void
824	aio_stat(fh_or_path,callback=&PL_sv_undef)	1113	aio_stat (fh_or_path,callback=&PL_sv_undef)
825	SV * fh_or_path	1114	SV * fh_or_path
826	SV * callback	1115	SV * callback
827	ALIAS:	1116	ALIAS:
828	aio_stat = REQ_STAT	1117	aio_stat = REQ_STAT
829	aio_lstat = REQ_LSTAT	1118	aio_lstat = REQ_LSTAT
830	CODE:	1119	PPCODE:
831	{	1120	{
832	dREQ;	1121	dREQ;
833		1122
834	New (0, req->statdata, 1, Stat_t);	1123	New (0, req->statdata, 1, Stat_t);
835	if (!req->statdata)	1124	if (!req->statdata)
836	{	1125	{
837	free_req (req);	1126	req_free (req);
838	croak ("out of memory during aio_req->statdata allocation");	1127	croak ("out of memory during aio_req->statdata allocation");
839	}	1128	}
840		1129
841	if (SvPOK (fh_or_path))	1130	if (SvPOK (fh_or_path))
842	{	1131	{
…		…
849	req->type = REQ_FSTAT;	1138	req->type = REQ_FSTAT;
850	req->fh = newSVsv (fh_or_path);	1139	req->fh = newSVsv (fh_or_path);
851	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1140	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
852	}	1141	}
853		1142
854	send_req (req);	1143	REQ_SEND;
855	}	1144	}
856		1145
857	void	1146	void
858	aio_unlink(pathname,callback=&PL_sv_undef)	1147	aio_unlink (pathname,callback=&PL_sv_undef)
859	SV * pathname	1148	SV * pathname
860	SV * callback	1149	SV * callback
861	ALIAS:	1150	ALIAS:
862	aio_unlink = REQ_UNLINK	1151	aio_unlink = REQ_UNLINK
863	aio_rmdir = REQ_RMDIR	1152	aio_rmdir = REQ_RMDIR
		1153	aio_readdir = REQ_READDIR
864	CODE:	1154	PPCODE:
865	{	1155	{
866	dREQ;	1156	dREQ;
867		1157
868	req->type = ix;	1158	req->type = ix;
869	req->data = newSVsv (pathname);	1159	req->data = newSVsv (pathname);
870	req->dataptr = SvPVbyte_nolen (req->data);	1160	req->dataptr = SvPVbyte_nolen (req->data);
871		1161
872	send_req (req);	1162	REQ_SEND;
873	}	1163	}
874		1164
875	void	1165	void
876	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1166	aio_link (oldpath,newpath,callback=&PL_sv_undef)
877	SV * oldpath	1167	SV * oldpath
878	SV * newpath	1168	SV * newpath
879	SV * callback	1169	SV * callback
		1170	ALIAS:
		1171	aio_link = REQ_LINK
		1172	aio_symlink = REQ_SYMLINK
		1173	aio_rename = REQ_RENAME
880	CODE:	1174	PPCODE:
881	{	1175	{
882	dREQ;	1176	dREQ;
883		1177
884	req->type = REQ_SYMLINK;	1178	req->type = ix;
885	req->fh = newSVsv (oldpath);	1179	req->fh = newSVsv (oldpath);
886	req->data2ptr = SvPVbyte_nolen (req->fh);	1180	req->data2ptr = SvPVbyte_nolen (req->fh);
887	req->data = newSVsv (newpath);	1181	req->data = newSVsv (newpath);
888	req->dataptr = SvPVbyte_nolen (req->data);	1182	req->dataptr = SvPVbyte_nolen (req->data);
889		1183
890	send_req (req);	1184	REQ_SEND;
891	}	1185	}
892		1186
893	void	1187	void
		1188	aio_sleep (delay,callback=&PL_sv_undef)
		1189	double delay
		1190	SV * callback
		1191	PPCODE:
		1192	{
		1193	dREQ;
		1194
		1195	req->type = REQ_SLEEP;
		1196	req->fd = delay < 0. ? 0 : delay;
		1197	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1198
		1199	REQ_SEND;
		1200	}
		1201
		1202	void
		1203	aio_group (callback=&PL_sv_undef)
		1204	SV * callback
		1205	PROTOTYPE: ;$
		1206	PPCODE:
		1207	{
		1208	dREQ;
		1209	req->type = REQ_GROUP;
		1210	req_send (req);
		1211	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1212	}
		1213
		1214	void
894	flush()	1215	flush ()
895	PROTOTYPE:	1216	PROTOTYPE:
896	CODE:	1217	CODE:
897	while (nreqs)	1218	while (nreqs)
898	{	1219	{
899	poll_wait ();	1220	poll_wait ();
…		…
939	CODE:	1260	CODE:
940	RETVAL = nreqs;	1261	RETVAL = nreqs;
941	OUTPUT:	1262	OUTPUT:
942	RETVAL	1263	RETVAL
943		1264
		1265	PROTOTYPES: DISABLE
		1266
		1267	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1268
		1269	void
		1270	cancel (aio_req_ornot req)
		1271	PROTOTYPE:
		1272	CODE:
		1273	req_cancel (req);
		1274
		1275	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1276
		1277	void
		1278	add (aio_req grp, ...)
		1279	PPCODE:
		1280	{
		1281	int i;
		1282
		1283	if (grp->fd == 2)
		1284	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1285
		1286	for (i = 1; i < items; ++i )
		1287	{
		1288	if (GIMME_V != G_VOID)
		1289	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1290
		1291	aio_req req = SvAIO_REQ (ST (i));
		1292
		1293	if (req)
		1294	{
		1295	++grp->length;
		1296	req->grp = grp;
		1297
		1298	req->grp_prev = 0;
		1299	req->grp_next = grp->grp_first;
		1300
		1301	if (grp->grp_first)
		1302	grp->grp_first->grp_prev = req;
		1303
		1304	grp->grp_first = req;
		1305	}
		1306	}
		1307	}
		1308
		1309	void
		1310	lock (aio_req grp)
		1311	CODE:
		1312	++grp->length;
		1313
		1314	void
		1315	unlock (aio_req grp)
		1316	CODE:
		1317	aio_grp_dec (grp);
		1318
		1319	void
		1320	feeder_limit (aio_req grp, int limit)
		1321	CODE:
		1322	grp->fd2 = limit;
		1323	aio_grp_feed (grp);
		1324
		1325	void
		1326	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
		1327	CODE:
		1328	{
		1329	SvREFCNT_dec (grp->fh2);
		1330	grp->fh2 = newSVsv (callback);
		1331
		1332	if (grp->fd2 <= 0)
		1333	grp->fd2 = 2;
		1334
		1335	aio_grp_feed (grp);
		1336	}
		1337

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC vs. Revision 1.50 by root, Sun Oct 22 21:13:47 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC vs.
Revision 1.50 by root, Sun Oct 22 21:13:47 2006 UTC