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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC vs.
Revision 1.72 by root, Tue Oct 24 17:22:17 2006 UTC

…		…
		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux
		5	# define _GNU_SOURCE
		6	#endif
		7
1	#define _REENTRANT 1	8	#define _REENTRANT 1
		9
2	#include <errno.h>	10	#include <errno.h>
3		11
4	#include "EXTERN.h"	12	#include "EXTERN.h"
5	#include "perl.h"	13	#include "perl.h"
6	#include "XSUB.h"	14	#include "XSUB.h"
9		17
10	#include <pthread.h>	18	#include <pthread.h>
11		19
12	#include <stddef.h>	20	#include <stddef.h>
13	#include <errno.h>	21	#include <errno.h>
		22	#include <sys/time.h>
		23	#include <sys/select.h>
14	#include <sys/types.h>	24	#include <sys/types.h>
15	#include <sys/stat.h>	25	#include <sys/stat.h>
16	#include <limits.h>	26	#include <limits.h>
17	#include <unistd.h>	27	#include <unistd.h>
18	#include <fcntl.h>	28	#include <fcntl.h>
…		…
39	# define NAME_MAX 4096	49	# define NAME_MAX 4096
40	#endif	50	#endif
41		51
42	#if __ia64	52	#if __ia64
43	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 \|\| __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	56	#else
45	# define STACKSIZE 8192	57	# define STACKSIZE 16384
46	#endif	58	#endif
		59
		60	/* buffer size for various temporary buffers */
		61	#define AIO_BUFSIZE 65536
		62
		63	#define dBUF \
		64	char *aio_buf; \
		65	LOCK (wrklock); \
		66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		67	UNLOCK (wrklock); \
		68	if (!aio_buf) \
		69	return -1;
47		70
48	enum {	71	enum {
49	REQ_QUIT,	72	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	73	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	79	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	80	REQ_LINK, REQ_SYMLINK,
58	REQ_GROUP,	81	REQ_GROUP, REQ_NOP,
		82	REQ_BUSY,
59	};	83	};
60		84
61	#define AIO_REQ_KLASS "IO::AIO::REQ"	85	#define AIO_REQ_KLASS "IO::AIO::REQ"
62	#define AIO_GRP_KLASS "IO::AIO::GRP"	86	#define AIO_GRP_KLASS "IO::AIO::GRP"
63		87
64	typedef struct aio_cb	88	typedef struct aio_cb
65	{	89	{
66	struct aio_cb grp, grp_prev, *grp_next;
67
68	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
69
70	SV self; / the perl counterpart of this request, if any */
71		91
72	SV data, callback;	92	SV data, callback;
73	SV fh, fh2;	93	SV fh, fh2;
74	void dataptr, data2ptr;	94	void dataptr, data2ptr;
75	Stat_t *statdata;	95	Stat_t *statdata;
76	off_t offset;	96	off_t offset;
77	size_t length;	97	size_t length;
78	ssize_t result;	98	ssize_t result;
79		99
		100	STRLEN dataoffset;
80	int type;	101	int type;
81	int fd, fd2;	102	int fd, fd2;
82	int errorno;	103	int errorno;
83	STRLEN dataoffset;
84	mode_t mode; /* open */	104	mode_t mode; /* open */
		105
85	unsigned char cancelled;	106	unsigned char flags;
		107	unsigned char pri;
		108
		109	SV self; / the perl counterpart of this request, if any */
		110	struct aio_cb grp, grp_prev, grp_next, grp_first;
86	} aio_cb;	111	} aio_cb;
		112
		113	enum {
		114	FLAG_CANCELLED = 0x01,
		115	};
87		116
88	typedef aio_cb *aio_req;	117	typedef aio_cb *aio_req;
89	typedef aio_cb *aio_req_ornot;	118	typedef aio_cb *aio_req_ornot;
90	typedef aio_cb *aio_group;	119
		120	enum {
		121	PRI_MIN = -4,
		122	PRI_MAX = 4,
		123
		124	DEFAULT_PRI = 0,
		125	PRI_BIAS = -PRI_MIN,
		126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		127	};
		128
		129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
91		130
92	static int started, wanted;	131	static int started, wanted;
93	static volatile int nreqs;	132	static volatile int nreqs;
94	static int max_outstanding = 1<<30;	133	static int max_outstanding = 1<<30;
95	static int respipe [2];	134	static int respipe [2];
96		135
		136	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		137	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		138	#else
		139	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		140	#endif
		141
		142	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		143	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		144
		145	/* worker threasd management */
		146	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		147
		148	typedef struct worker {
		149	/* locked by wrklock */
		150	struct worker prev, next;
		151
		152	pthread_t tid;
		153
		154	/* locked by reslock, reqlock or wrklock */
		155	aio_req req; /* currently processed request */
		156	void *dbuf;
		157	DIR *dirp;
		158	} worker;
		159
		160	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		161
		162	static void worker_clear (worker *wrk)
		163	{
		164	if (wrk->dirp)
		165	{
		166	closedir (wrk->dirp);
		167	wrk->dirp = 0;
		168	}
		169
		170	if (wrk->dbuf)
		171	{
		172	free (wrk->dbuf);
		173	wrk->dbuf = 0;
		174	}
		175	}
		176
		177	static void worker_free (worker *wrk)
		178	{
		179	wrk->next->prev = wrk->prev;
		180	wrk->prev->next = wrk->next;
		181
		182	free (wrk);
		183	}
		184
97	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
98	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	186	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
99	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	187	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
100		188
101	static volatile aio_req reqs, reqe; /* queue start, queue end */	189	/*
102	static volatile aio_req ress, rese; /* queue start, queue end */	190	* a somewhat faster data structure might be nice, but
		191	* with 8 priorities this actually needs <20 insns
		192	* per shift, the most expensive operation.
		193	*/
		194	typedef struct {
		195	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		196	int size;
		197	} reqq;
		198
		199	static reqq req_queue;
		200	static reqq res_queue;
		201
		202	int reqq_push (reqq *q, aio_req req)
		203	{
		204	int pri = req->pri;
		205	req->next = 0;
		206
		207	if (q->qe[pri])
		208	{
		209	q->qe[pri]->next = req;
		210	q->qe[pri] = req;
		211	}
		212	else
		213	q->qe[pri] = q->qs[pri] = req;
		214
		215	return q->size++;
		216	}
		217
		218	aio_req reqq_shift (reqq *q)
		219	{
		220	int pri;
		221
		222	if (!q->size)
		223	return 0;
		224
		225	--q->size;
		226
		227	for (pri = NUM_PRI; pri--; )
		228	{
		229	aio_req req = q->qs[pri];
		230
		231	if (req)
		232	{
		233	if (!(q->qs[pri] = req->next))
		234	q->qe[pri] = 0;
		235
		236	return req;
		237	}
		238	}
		239
		240	abort ();
		241	}
		242
		243	static void req_invoke (aio_req req);
		244	static void req_free (aio_req req);
		245	static void req_cancel (aio_req req);
103		246
104	/* must be called at most once */	247	/* must be called at most once */
105	static SV req_sv (aio_req req, const char klass)	248	static SV req_sv (aio_req req, const char klass)
106	{	249	{
		250	if (!req->self)
		251	{
107	req->self = (SV *)newHV ();	252	req->self = (SV *)newHV ();
108	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		254	}
109		255
110	return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));	256	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
111	}	257	}
112		258
113	static aio_req SvAIO_REQ (SV sv, const char klass)	259	static aio_req SvAIO_REQ (SV *sv)
114	{	260	{
		261	MAGIC *mg;
		262
115	if (!sv_derived_from (sv, klass) \|\| !SvROK (sv))	263	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
116	croak ("object of class %s expected", klass);	264	croak ("object of class " AIO_REQ_KLASS " expected");
117		265
118	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	266	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
119		267
120	return mg ? (aio_req)mg->mg_ptr : 0;	268	return mg ? (aio_req)mg->mg_ptr : 0;
		269	}
		270
		271	static void aio_grp_feed (aio_req grp)
		272	{
		273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		274	{
		275	int old_len = grp->length;
		276
		277	if (grp->fh2 && SvOK (grp->fh2))
		278	{
		279	dSP;
		280
		281	ENTER;
		282	SAVETMPS;
		283	PUSHMARK (SP);
		284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		285	PUTBACK;
		286	call_sv (grp->fh2, G_VOID \| G_EVAL \| G_KEEPERR);
		287	SPAGAIN;
		288	FREETMPS;
		289	LEAVE;
		290	}
		291
		292	/* stop if no progress has been made */
		293	if (old_len == grp->length)
		294	{
		295	SvREFCNT_dec (grp->fh2);
		296	grp->fh2 = 0;
		297	break;
		298	}
		299	}
		300	}
		301
		302	static void aio_grp_dec (aio_req grp)
		303	{
		304	--grp->length;
		305
		306	/* call feeder, if applicable */
		307	aio_grp_feed (grp);
		308
		309	/* finish, if done */
		310	if (!grp->length && grp->fd)
		311	{
		312	req_invoke (grp);
		313	req_free (grp);
		314	}
		315	}
		316
		317	static void poll_wait ()
		318	{
		319	fd_set rfd;
		320
		321	while (nreqs)
		322	{
		323	int size;
		324	#if !(__i386 \|\| __x86_64) /* safe without sempahore on these archs */
		325	LOCK (reslock);
		326	#endif
		327	size = res_queue.size;
		328	#if !(__i386 \|\| __x86_64) /* safe without sempahore on these archs */
		329	UNLOCK (reslock);
		330	#endif
		331
		332	if (size)
		333	return;
		334
		335	FD_ZERO(&rfd);
		336	FD_SET(respipe [0], &rfd);
		337
		338	select (respipe [0] + 1, &rfd, 0, 0, 0);
		339	}
		340	}
		341
		342	static void req_invoke (aio_req req)
		343	{
		344	dSP;
		345
		346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		347	{
		348	errno = req->errorno;
		349
		350	ENTER;
		351	SAVETMPS;
		352	PUSHMARK (SP);
		353	EXTEND (SP, 1);
		354
		355	switch (req->type)
		356	{
		357	case REQ_READDIR:
		358	{
		359	SV *rv = &PL_sv_undef;
		360
		361	if (req->result >= 0)
		362	{
		363	int i;
		364	char *buf = req->data2ptr;
		365	AV *av = newAV ();
		366
		367	av_extend (av, req->result - 1);
		368
		369	for (i = 0; i < req->result; ++i)
		370	{
		371	SV *sv = newSVpv (buf, 0);
		372
		373	av_store (av, i, sv);
		374	buf += SvCUR (sv) + 1;
		375	}
		376
		377	rv = sv_2mortal (newRV_noinc ((SV *)av));
		378	}
		379
		380	PUSHs (rv);
		381	}
		382	break;
		383
		384	case REQ_OPEN:
		385	{
		386	/* convert fd to fh */
		387	SV *fh;
		388
		389	PUSHs (sv_2mortal (newSViv (req->result)));
		390	PUTBACK;
		391	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		392	SPAGAIN;
		393
		394	fh = SvREFCNT_inc (POPs);
		395
		396	PUSHMARK (SP);
		397	XPUSHs (sv_2mortal (fh));
		398	}
		399	break;
		400
		401	case REQ_GROUP:
		402	req->fd = 2; /* mark group as finished */
		403
		404	if (req->data)
		405	{
		406	int i;
		407	AV av = (AV )req->data;
		408
		409	EXTEND (SP, AvFILL (av) + 1);
		410	for (i = 0; i <= AvFILL (av); ++i)
		411	PUSHs (*av_fetch (av, i, 0));
		412	}
		413	break;
		414
		415	case REQ_NOP:
		416	case REQ_BUSY:
		417	break;
		418
		419	default:
		420	PUSHs (sv_2mortal (newSViv (req->result)));
		421	break;
		422	}
		423
		424
		425	PUTBACK;
		426	call_sv (req->callback, G_VOID \| G_EVAL);
		427	SPAGAIN;
		428
		429	FREETMPS;
		430	LEAVE;
		431	}
		432
		433	if (req->grp)
		434	{
		435	aio_req grp = req->grp;
		436
		437	/* unlink request */
		438	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		439	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		440
		441	if (grp->grp_first == req)
		442	grp->grp_first = req->grp_next;
		443
		444	aio_grp_dec (grp);
		445	}
		446
		447	if (SvTRUE (ERRSV))
		448	{
		449	req_free (req);
		450	croak (0);
		451	}
121	}	452	}
122		453
123	static void req_free (aio_req req)	454	static void req_free (aio_req req)
124	{	455	{
125	if (req->self)	456	if (req->self)
126	{	457	{
127	sv_unmagic (req->self, PERL_MAGIC_ext);	458	sv_unmagic (req->self, PERL_MAGIC_ext);
128	SvREFCNT_dec (req->self);	459	SvREFCNT_dec (req->self);
129	}	460	}
130		461
131	if (req->data)
132	SvREFCNT_dec (req->data);	462	SvREFCNT_dec (req->data);
133
134	if (req->fh)
135	SvREFCNT_dec (req->fh);	463	SvREFCNT_dec (req->fh);
136
137	if (req->fh2)
138	SvREFCNT_dec (req->fh2);	464	SvREFCNT_dec (req->fh2);
139
140	if (req->statdata)
141	Safefree (req->statdata);
142
143	if (req->callback)
144	SvREFCNT_dec (req->callback);	465	SvREFCNT_dec (req->callback);
		466	Safefree (req->statdata);
145		467
146	if (req->type == REQ_READDIR && req->result >= 0)	468	if (req->type == REQ_READDIR)
147	free (req->data2ptr);	469	free (req->data2ptr);
148		470
149	Safefree (req);	471	Safefree (req);
150	}	472	}
151		473
152	static void	474	static void req_cancel_subs (aio_req grp)
153	poll_wait ()
154	{	475	{
155	if (nreqs && !ress)	476	aio_req sub;
156	{
157	fd_set rfd;
158	FD_ZERO(&rfd);
159	FD_SET(respipe [0], &rfd);
160		477
161	select (respipe [0] + 1, &rfd, 0, 0, 0);	478	if (grp->type != REQ_GROUP)
162	}	479	return;
163	}
164		480
165	static int	481	SvREFCNT_dec (grp->fh2);
166	poll_cb ()	482	grp->fh2 = 0;
		483
		484	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		485	req_cancel (sub);
		486	}
		487
		488	static void req_cancel (aio_req req)
		489	{
		490	req->flags \|= FLAG_CANCELLED;
		491
		492	req_cancel_subs (req);
		493	}
		494
		495	static int poll_cb ()
167	{	496	{
168	dSP;	497	dSP;
169	int count = 0;	498	int count = 0;
170	int do_croak = 0;	499	int do_croak = 0;
171	aio_req req;	500	aio_req req;
172		501
173	for (;;)	502	for (;;)
174	{	503	{
175	pthread_mutex_lock (&reslock);	504	LOCK (reslock);
176	req = ress;	505	req = reqq_shift (&res_queue);
177		506
178	if (req)	507	if (req)
179	{	508	{
180	ress = req->next;
181
182	if (!ress)	509	if (!res_queue.size)
183	{	510	{
184	/* read any signals sent by the worker threads */	511	/* read any signals sent by the worker threads */
185	char buf [32];	512	char buf [32];
186	while (read (respipe [0], buf, 32) == 32)	513	while (read (respipe [0], buf, 32) == 32)
187	;	514	;
188
189	rese = 0;
190	}	515	}
191	}	516	}
192		517
193	pthread_mutex_unlock (&reslock);	518	UNLOCK (reslock);
194		519
195	if (!req)	520	if (!req)
196	break;	521	break;
197		522
198	nreqs--;	523	--nreqs;
199		524
200	if (req->type == REQ_QUIT)	525	if (req->type == REQ_QUIT)
201	started--;	526	started--;
		527	else if (req->type == REQ_GROUP && req->length)
		528	{
		529	req->fd = 1; /* mark request as delayed */
		530	continue;
		531	}
202	else	532	else
203	{	533	{
204	int errorno = errno;
205	errno = req->errorno;
206
207	if (req->type == REQ_READ)	534	if (req->type == REQ_READ)
208	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
209		536
210	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))	537	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
211	SvREADONLY_off (req->data);	538	SvREADONLY_off (req->data);
…		…
215	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
216	PL_laststatval = req->result;	543	PL_laststatval = req->result;
217	PL_statcache = *(req->statdata);	544	PL_statcache = *(req->statdata);
218	}	545	}
219		546
220	ENTER;	547	req_invoke (req);
221	PUSHMARK (SP);
222		548
223	if (req->type == REQ_READDIR)
224	{
225	SV *rv = &PL_sv_undef;
226
227	if (req->result >= 0)
228	{
229	char *buf = req->data2ptr;
230	AV *av = newAV ();
231
232	while (req->result)
233	{
234	SV *sv = newSVpv (buf, 0);
235
236	av_push (av, sv);
237	buf += SvCUR (sv) + 1;
238	req->result--;
239	}
240
241	rv = sv_2mortal (newRV_noinc ((SV *)av));
242	}
243
244	XPUSHs (rv);
245	}
246	else
247	{
248	XPUSHs (sv_2mortal (newSViv (req->result)));
249
250	if (req->type == REQ_OPEN)
251	{
252	/* convert fd to fh */
253	SV *fh;
254
255	PUTBACK;
256	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
257	SPAGAIN;
258
259	fh = SvREFCNT_inc (POPs);
260
261	PUSHMARK (SP);
262	XPUSHs (sv_2mortal (fh));
263	}
264	}
265
266	if (SvOK (req->callback) && !req->cancelled)
267	{
268	PUTBACK;
269	call_sv (req->callback, G_VOID \| G_EVAL);
270	SPAGAIN;
271
272	if (SvTRUE (ERRSV))
273	{
274	req_free (req);
275	croak (0);
276	}
277	}
278
279	LEAVE;
280
281	errno = errorno;
282	count++;	549	count++;
283	}	550	}
284		551
285	req_free (req);	552	req_free (req);
286	}	553	}
…		…
288	return count;	555	return count;
289	}	556	}
290		557
291	static void aio_proc(void arg);	558	static void aio_proc(void arg);
292		559
293	static void
294	start_thread (void)	560	static void start_thread (void)
295	{	561	{
		562	worker *wrk = calloc (1, sizeof (worker));
		563
		564	if (!wrk)
		565	croak ("unable to allocate worker thread data");
		566
296	sigset_t fullsigset, oldsigset;	567	sigset_t fullsigset, oldsigset;
297	pthread_t tid;
298	pthread_attr_t attr;	568	pthread_attr_t attr;
299		569
300	pthread_attr_init (&attr);	570	pthread_attr_init (&attr);
301	pthread_attr_setstacksize (&attr, STACKSIZE);	571	pthread_attr_setstacksize (&attr, STACKSIZE);
302	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
303		573
304	sigfillset (&fullsigset);	574	sigfillset (&fullsigset);
		575
		576	LOCK (wrklock);
305	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
306		578
307	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		580	{
		581	wrk->prev = &wrk_first;
		582	wrk->next = wrk_first.next;
		583	wrk_first.next->prev = wrk;
		584	wrk_first.next = wrk;
308	started++;	585	started++;
		586	}
		587	else
		588	free (wrk);
309		589
310	sigprocmask (SIG_SETMASK, &oldsigset, 0);	590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		591	UNLOCK (wrklock);
311	}	592	}
312		593
313	static void
314	req_send (aio_req req)	594	static void req_send (aio_req req)
315	{	595	{
316	while (started < wanted && nreqs >= started)	596	while (started < wanted && nreqs >= started)
317	start_thread ();	597	start_thread ();
318		598
319	nreqs++;	599	++nreqs;
320		600
321	pthread_mutex_lock (&reqlock);	601	LOCK (reqlock);
322		602	reqq_push (&req_queue, req);
323	req->next = 0;
324
325	if (reqe)
326	{
327	reqe->next = req;
328	reqe = req;
329	}
330	else
331	reqe = reqs = req;
332
333	pthread_cond_signal (&reqwait);	603	pthread_cond_signal (&reqwait);
334	pthread_mutex_unlock (&reqlock);	604	UNLOCK (reqlock);
335		605
336	if (nreqs > max_outstanding)	606	if (nreqs > max_outstanding)
337	for (;;)	607	for (;;)
338	{	608	{
339	poll_cb ();	609	poll_cb ();
…		…
343		613
344	poll_wait ();	614	poll_wait ();
345	}	615	}
346	}	616	}
347		617
348	static void	618	static void end_thread (void)
349	end_thread (void)
350	{	619	{
351	aio_req req;	620	aio_req req;
		621
352	Newz (0, req, 1, aio_cb);	622	Newz (0, req, 1, aio_cb);
		623
353	req->type = REQ_QUIT;	624	req->type = REQ_QUIT;
		625	req->pri = PRI_MAX + PRI_BIAS;
354		626
355	req_send (req);	627	req_send (req);
356	}	628	}
357		629
358	static void min_parallel (int nthreads)	630	static void min_parallel (int nthreads)
…		…
405	* normal read/write by using a mutex. slows down execution a lot,	677	* normal read/write by using a mutex. slows down execution a lot,
406	* but that's your problem, not mine.	678	* but that's your problem, not mine.
407	*/	679	*/
408	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	680	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
409		681
410	static ssize_t	682	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
411	pread (int fd, void *buf, size_t count, off_t offset)
412	{	683	{
413	ssize_t res;	684	ssize_t res;
414	off_t ooffset;	685	off_t ooffset;
415		686
416	pthread_mutex_lock (&preadwritelock);	687	LOCK (preadwritelock);
417	ooffset = lseek (fd, 0, SEEK_CUR);	688	ooffset = lseek (fd, 0, SEEK_CUR);
418	lseek (fd, offset, SEEK_SET);	689	lseek (fd, offset, SEEK_SET);
419	res = read (fd, buf, count);	690	res = read (fd, buf, count);
420	lseek (fd, ooffset, SEEK_SET);	691	lseek (fd, ooffset, SEEK_SET);
421	pthread_mutex_unlock (&preadwritelock);	692	UNLOCK (preadwritelock);
422		693
423	return res;	694	return res;
424	}	695	}
425		696
426	static ssize_t
427	pwrite (int fd, void *buf, size_t count, off_t offset)	697	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
428	{	698	{
429	ssize_t res;	699	ssize_t res;
430	off_t ooffset;	700	off_t ooffset;
431		701
432	pthread_mutex_lock (&preadwritelock);	702	LOCK (preadwritelock);
433	ooffset = lseek (fd, 0, SEEK_CUR);	703	ooffset = lseek (fd, 0, SEEK_CUR);
434	lseek (fd, offset, SEEK_SET);	704	lseek (fd, offset, SEEK_SET);
435	res = write (fd, buf, count);	705	res = write (fd, buf, count);
436	lseek (fd, offset, SEEK_SET);	706	lseek (fd, offset, SEEK_SET);
437	pthread_mutex_unlock (&preadwritelock);	707	UNLOCK (preadwritelock);
438		708
439	return res;	709	return res;
440	}	710	}
441	#endif	711	#endif
442		712
…		…
445	#endif	715	#endif
446		716
447	#if !HAVE_READAHEAD	717	#if !HAVE_READAHEAD
448	# define readahead aio_readahead	718	# define readahead aio_readahead
449		719
450	static ssize_t
451	readahead (int fd, off_t offset, size_t count)	720	static ssize_t readahead (int fd, off_t offset, size_t count)
452	{	721	{
453	char readahead_buf[4096];	722	dBUF;
454		723
455	while (count > 0)	724	while (count > 0)
456	{	725	{
457	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	726	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
458		727
459	pread (fd, readahead_buf, len, offset);	728	pread (fd, aio_buf, len, offset);
460	offset += len;	729	offset += len;
461	count -= len;	730	count -= len;
462	}	731	}
463		732
464	errno = 0;	733	errno = 0;
…		…
468	#if !HAVE_READDIR_R	737	#if !HAVE_READDIR_R
469	# define readdir_r aio_readdir_r	738	# define readdir_r aio_readdir_r
470		739
471	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	740	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
472		741
473	static int
474	readdir_r (DIR dirp, struct dirent ent, struct dirent **res)	742	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
475	{	743	{
476	struct dirent *e;	744	struct dirent *e;
477	int errorno;	745	int errorno;
478		746
479	pthread_mutex_lock (&readdirlock);	747	LOCK (readdirlock);
480		748
481	e = readdir (dirp);	749	e = readdir (dirp);
482	errorno = errno;	750	errorno = errno;
483		751
484	if (e)	752	if (e)
…		…
487	strcpy (ent->d_name, e->d_name);	755	strcpy (ent->d_name, e->d_name);
488	}	756	}
489	else	757	else
490	*res = 0;	758	*res = 0;
491		759
492	pthread_mutex_unlock (&readdirlock);	760	UNLOCK (readdirlock);
493		761
494	errno = errorno;	762	errno = errorno;
495	return e ? 0 : -1;	763	return e ? 0 : -1;
496	}	764	}
497	#endif	765	#endif
498		766
499	/* sendfile always needs emulation */	767	/* sendfile always needs emulation */
500	static ssize_t
501	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	768	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
502	{	769	{
503	ssize_t res;	770	ssize_t res;
504		771
505	if (!count)	772	if (!count)
506	return 0;	773	return 0;
…		…
555	#endif	822	#endif
556	)	823	)
557	)	824	)
558	{	825	{
559	/* emulate sendfile. this is a major pain in the ass */	826	/* emulate sendfile. this is a major pain in the ass */
560	char buf[4096];	827	dBUF;
		828
561	res = 0;	829	res = 0;
562		830
563	while (count)	831	while (count)
564	{	832	{
565	ssize_t cnt;	833	ssize_t cnt;
566		834
567	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	835	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
568		836
569	if (cnt <= 0)	837	if (cnt <= 0)
570	{	838	{
571	if (cnt && !res) res = -1;	839	if (cnt && !res) res = -1;
572	break;	840	break;
573	}	841	}
574		842
575	cnt = write (ofd, buf, cnt);	843	cnt = write (ofd, aio_buf, cnt);
576		844
577	if (cnt <= 0)	845	if (cnt <= 0)
578	{	846	{
579	if (cnt && !res) res = -1;	847	if (cnt && !res) res = -1;
580	break;	848	break;
…		…
588		856
589	return res;	857	return res;
590	}	858	}
591		859
592	/* read a full directory */	860	/* read a full directory */
593	static int	861	static void scandir_ (aio_req req, worker *self)
594	scandir_ (const char path, void *namesp)
595	{	862	{
596	DIR *dirp = opendir (path);	863	DIR *dirp;
597	union	864	union
598	{	865	{
599	struct dirent d;	866	struct dirent d;
600	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	867	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
601	} u;	868	} *u;
602	struct dirent *entp;	869	struct dirent *entp;
603	char name, names;	870	char name, names;
604	int memlen = 4096;	871	int memlen = 4096;
605	int memofs = 0;	872	int memofs = 0;
606	int res = 0;	873	int res = 0;
607	int errorno;	874	int errorno;
608		875
609	if (!dirp)	876	LOCK (wrklock);
610	return -1;	877	self->dirp = dirp = opendir (req->dataptr);
		878	self->dbuf = u = malloc (sizeof (*u));
		879	UNLOCK (wrklock);
611		880
612	names = malloc (memlen);	881	req->data2ptr = names = malloc (memlen);
613		882
		883	if (dirp && u && names)
614	for (;;)	884	for (;;)
615	{	885	{
		886	errno = 0;
616	errno = 0, readdir_r (dirp, &u.d, &entp);	887	readdir_r (dirp, &u->d, &entp);
617		888
618	if (!entp)	889	if (!entp)
619	break;	890	break;
620		891
621	name = entp->d_name;	892	name = entp->d_name;
622		893
623	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))	894	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
624	{	895	{
625	int len = strlen (name) + 1;	896	int len = strlen (name) + 1;
626		897
627	res++;	898	res++;
628		899
629	while (memofs + len > memlen)	900	while (memofs + len > memlen)
630	{	901	{
631	memlen *= 2;	902	memlen *= 2;
		903	LOCK (wrklock);
632	names = realloc (names, memlen);	904	req->data2ptr = names = realloc (names, memlen);
		905	UNLOCK (wrklock);
		906
633	if (!names)	907	if (!names)
634	break;	908	break;
635	}	909	}
636		910
637	memcpy (names + memofs, name, len);	911	memcpy (names + memofs, name, len);
638	memofs += len;	912	memofs += len;
639	}	913	}
640	}	914	}
641		915
642	errorno = errno;
643	closedir (dirp);
644
645	if (errorno)	916	if (errno)
646	{
647	free (names);
648	errno = errorno;
649	res = -1;	917	res = -1;
650	}	918
651		919	req->result = res;
652	namesp = (void )names;
653	return res;
654	}	920	}
655		921
656	/*****************************************************************************/	922	/*****************************************************************************/
657		923
658	static void *
659	aio_proc (void *thr_arg)	924	static void aio_proc (void thr_arg)
660	{	925	{
661	aio_req req;	926	aio_req req;
662	int type;	927	int type;
		928	worker self = (worker )thr_arg;
663		929
664	do	930	do
665	{	931	{
666	pthread_mutex_lock (&reqlock);	932	LOCK (reqlock);
667		933
668	for (;;)	934	for (;;)
669	{	935	{
670	req = reqs;	936	self->req = req = reqq_shift (&req_queue);
671
672	if (reqs)
673	{
674	reqs = reqs->next;
675	if (!reqs) reqe = 0;
676	}
677		937
678	if (req)	938	if (req)
679	break;	939	break;
680		940
681	pthread_cond_wait (&reqwait, &reqlock);	941	pthread_cond_wait (&reqwait, &reqlock);
682	}	942	}
683		943
684	pthread_mutex_unlock (&reqlock);	944	UNLOCK (reqlock);
685		945
686	errno = 0; /* strictly unnecessary */	946	errno = 0; /* strictly unnecessary */
		947	type = req->type; /* remember type for QUIT check */
687		948
688	if (!req->cancelled)	949	if (!(req->flags & FLAG_CANCELLED))
689	switch (req->type)	950	switch (type)
690	{	951	{
691	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	952	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
692	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	953	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
693		954
694	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	955	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
695	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	956	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
696		957
697	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	958	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
698	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	959	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
699	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	960	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
700		961
…		…
706	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	967	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
707	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	968	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
708		969
709	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	970	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
710	case REQ_FSYNC: req->result = fsync (req->fd); break;	971	case REQ_FSYNC: req->result = fsync (req->fd); break;
711	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	972	case REQ_READDIR: scandir_ (req, self); break;
712		973
		974	case REQ_BUSY:
		975	{
		976	struct timeval tv;
		977
		978	tv.tv_sec = req->fd;
		979	tv.tv_usec = req->fd2;
		980
		981	req->result = select (0, 0, 0, 0, &tv);
		982	}
		983
		984	case REQ_GROUP:
		985	case REQ_NOP:
713	case REQ_QUIT:	986	case REQ_QUIT:
714	break;	987	break;
715		988
716	default:	989	default:
717	req->result = ENOSYS;	990	req->result = ENOSYS;
718	break;	991	break;
719	}	992	}
720		993
721	req->errorno = errno;	994	req->errorno = errno;
722		995
723	pthread_mutex_lock (&reslock);	996	LOCK (reslock);
724		997
725	req->next = 0;	998	if (!reqq_push (&res_queue, req))
726
727	if (rese)
728	{
729	rese->next = req;
730	rese = req;
731	}
732	else
733	{
734	rese = ress = req;
735
736	/* write a dummy byte to the pipe so fh becomes ready */	999	/* write a dummy byte to the pipe so fh becomes ready */
737	write (respipe [1], &respipe, 1);	1000	write (respipe [1], &respipe, 1);
738	}
739		1001
740	pthread_mutex_unlock (&reslock);	1002	self->req = 0;
		1003	worker_clear (self);
		1004
		1005	UNLOCK (reslock);
741	}	1006	}
742	while (type != REQ_QUIT);	1007	while (type != REQ_QUIT);
743		1008
		1009	LOCK (wrklock);
		1010	worker_free (self);
		1011	UNLOCK (wrklock);
		1012
744	return 0;	1013	return 0;
745	}	1014	}
746		1015
747	/*****************************************************************************/	1016	/*****************************************************************************/
748		1017
749	static void atfork_prepare (void)	1018	static void atfork_prepare (void)
750	{	1019	{
751	pthread_mutex_lock (&reqlock);	1020	LOCK (wrklock);
752	pthread_mutex_lock (&reslock);	1021	LOCK (reqlock);
		1022	LOCK (reslock);
753	#if !HAVE_PREADWRITE	1023	#if !HAVE_PREADWRITE
754	pthread_mutex_lock (&preadwritelock);	1024	LOCK (preadwritelock);
755	#endif	1025	#endif
756	#if !HAVE_READDIR_R	1026	#if !HAVE_READDIR_R
757	pthread_mutex_lock (&readdirlock);	1027	LOCK (readdirlock);
758	#endif	1028	#endif
759	}	1029	}
760		1030
761	static void atfork_parent (void)	1031	static void atfork_parent (void)
762	{	1032	{
763	#if !HAVE_READDIR_R	1033	#if !HAVE_READDIR_R
764	pthread_mutex_unlock (&readdirlock);	1034	UNLOCK (readdirlock);
765	#endif	1035	#endif
766	#if !HAVE_PREADWRITE	1036	#if !HAVE_PREADWRITE
767	pthread_mutex_unlock (&preadwritelock);	1037	UNLOCK (preadwritelock);
768	#endif	1038	#endif
769	pthread_mutex_unlock (&reslock);	1039	UNLOCK (reslock);
770	pthread_mutex_unlock (&reqlock);	1040	UNLOCK (reqlock);
		1041	UNLOCK (wrklock);
771	}	1042	}
772		1043
773	static void atfork_child (void)	1044	static void atfork_child (void)
774	{	1045	{
775	aio_req prv;	1046	aio_req prv;
776		1047
		1048	while (prv = reqq_shift (&req_queue))
		1049	req_free (prv);
		1050
		1051	while (prv = reqq_shift (&res_queue))
		1052	req_free (prv);
		1053
		1054	while (wrk_first.next != &wrk_first)
		1055	{
		1056	worker *wrk = wrk_first.next;
		1057
		1058	if (wrk->req)
		1059	req_free (wrk->req);
		1060
		1061	worker_clear (wrk);
		1062	worker_free (wrk);
		1063	}
		1064
777	started = 0;	1065	started = 0;
778		1066	nreqs = 0;
779	while (reqs)
780	{
781	prv = reqs;
782	reqs = prv->next;
783	req_free (prv);
784	}
785
786	reqs = reqe = 0;
787
788	while (ress)
789	{
790	prv = ress;
791	ress = prv->next;
792	req_free (prv);
793	}
794
795	ress = rese = 0;
796		1067
797	close (respipe [0]);	1068	close (respipe [0]);
798	close (respipe [1]);	1069	close (respipe [1]);
799	create_pipe ();	1070	create_pipe ();
800		1071
801	atfork_parent ();	1072	atfork_parent ();
802	}	1073	}
803		1074
804	#define dREQ \	1075	#define dREQ \
805	aio_req req; \	1076	aio_req req; \
		1077	int req_pri = next_pri; \
		1078	next_pri = DEFAULT_PRI + PRI_BIAS; \
806	\	1079	\
807	if (SvOK (callback) && !SvROK (callback)) \	1080	if (SvOK (callback) && !SvROK (callback)) \
808	croak ("callback must be undef or of reference type"); \	1081	croak ("callback must be undef or of reference type"); \
809	\	1082	\
810	Newz (0, req, 1, aio_cb); \	1083	Newz (0, req, 1, aio_cb); \
811	if (!req) \	1084	if (!req) \
812	croak ("out of memory during aio_req allocation"); \	1085	croak ("out of memory during aio_req allocation"); \
813	\	1086	\
814	req->callback = newSVsv (callback)	1087	req->callback = newSVsv (callback); \
		1088	req->pri = req_pri
815		1089
816	#define REQ_SEND \	1090	#define REQ_SEND \
817	req_send (req); \	1091	req_send (req); \
818	\	1092	\
819	if (GIMME_V != G_VOID) \	1093	if (GIMME_V != G_VOID) \
…		…
1073		1347
1074	REQ_SEND;	1348	REQ_SEND;
1075	}	1349	}
1076		1350
1077	void	1351	void
		1352	aio_busy (delay,callback=&PL_sv_undef)
		1353	double delay
		1354	SV * callback
		1355	PPCODE:
		1356	{
		1357	dREQ;
		1358
		1359	req->type = REQ_BUSY;
		1360	req->fd = delay < 0. ? 0 : delay;
		1361	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1362
		1363	REQ_SEND;
		1364	}
		1365
		1366	void
1078	aio_group (callback=&PL_sv_undef)	1367	aio_group (callback=&PL_sv_undef)
1079	SV * callback	1368	SV * callback
1080	PROTOTYPE: ;&	1369	PROTOTYPE: ;$
1081	PPCODE:	1370	PPCODE:
1082	{	1371	{
1083	dREQ;	1372	dREQ;
		1373
1084	req->type = REQ_GROUP;	1374	req->type = REQ_GROUP;
		1375	req_send (req);
		1376
1085	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1377	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1086	}	1378	}
		1379
		1380	void
		1381	aio_nop (callback=&PL_sv_undef)
		1382	SV * callback
		1383	PPCODE:
		1384	{
		1385	dREQ;
		1386
		1387	req->type = REQ_NOP;
		1388
		1389	REQ_SEND;
		1390	}
		1391
		1392	void
		1393	aioreq_pri (int pri = DEFAULT_PRI)
		1394	CODE:
		1395	if (pri < PRI_MIN) pri = PRI_MIN;
		1396	if (pri > PRI_MAX) pri = PRI_MAX;
		1397	next_pri = pri + PRI_BIAS;
		1398
		1399	void
		1400	aioreq_nice (int nice = 0)
		1401	CODE:
		1402	nice = next_pri - nice;
		1403	if (nice < PRI_MIN) nice = PRI_MIN;
		1404	if (nice > PRI_MAX) nice = PRI_MAX;
		1405	next_pri = nice + PRI_BIAS;
1087		1406
1088	void	1407	void
1089	flush ()	1408	flush ()
1090	PROTOTYPE:	1409	PROTOTYPE:
1091	CODE:	1410	CODE:
…		…
1134	CODE:	1453	CODE:
1135	RETVAL = nreqs;	1454	RETVAL = nreqs;
1136	OUTPUT:	1455	OUTPUT:
1137	RETVAL	1456	RETVAL
1138		1457
		1458	PROTOTYPES: DISABLE
		1459
1139	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1460	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1140		1461
1141	void	1462	void
1142	cancel (aio_req_ornot req)	1463	cancel (aio_req_ornot req)
1143	PROTOTYPE:
1144	CODE:	1464	CODE:
1145	req->cancelled = 1;	1465	req_cancel (req);
1146		1466
		1467	void
		1468	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1469	CODE:
		1470	SvREFCNT_dec (req->callback);
		1471	req->callback = newSVsv (callback);
		1472
		1473	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1474
		1475	void
		1476	add (aio_req grp, ...)
		1477	PPCODE:
		1478	{
		1479	int i;
		1480	aio_req req;
		1481
		1482	if (grp->fd == 2)
		1483	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1484
		1485	for (i = 1; i < items; ++i )
		1486	{
		1487	if (GIMME_V != G_VOID)
		1488	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1489
		1490	req = SvAIO_REQ (ST (i));
		1491
		1492	if (req)
		1493	{
		1494	++grp->length;
		1495	req->grp = grp;
		1496
		1497	req->grp_prev = 0;
		1498	req->grp_next = grp->grp_first;
		1499
		1500	if (grp->grp_first)
		1501	grp->grp_first->grp_prev = req;
		1502
		1503	grp->grp_first = req;
		1504	}
		1505	}
		1506	}
		1507
		1508	void
		1509	cancel_subs (aio_req_ornot req)
		1510	CODE:
		1511	req_cancel_subs (req);
		1512
		1513	void
		1514	result (aio_req grp, ...)
		1515	CODE:
		1516	{
		1517	int i;
		1518	AV *av = newAV ();
		1519
		1520	for (i = 1; i < items; ++i )
		1521	av_push (av, newSVsv (ST (i)));
		1522
		1523	SvREFCNT_dec (grp->data);
		1524	grp->data = (SV *)av;
		1525	}
		1526
		1527	void
		1528	limit (aio_req grp, int limit)
		1529	CODE:
		1530	grp->fd2 = limit;
		1531	aio_grp_feed (grp);
		1532
		1533	void
		1534	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1535	CODE:
		1536	{
		1537	SvREFCNT_dec (grp->fh2);
		1538	grp->fh2 = newSVsv (callback);
		1539
		1540	if (grp->fd2 <= 0)
		1541	grp->fd2 = 2;
		1542
		1543	aio_grp_feed (grp);
		1544	}
		1545

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC vs. Revision 1.72 by root, Tue Oct 24 17:22:17 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC vs.
Revision 1.72 by root, Tue Oct 24 17:22:17 2006 UTC