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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC vs.
Revision 1.74 by root, Wed Oct 25 17:57:30 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"
41	# define NAME_MAX 4096	49	# define NAME_MAX 4096
42	#endif	50	#endif
43		51
44	#if __ia64	52	#if __ia64
45	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 \|\| __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	56	#else
47	# define STACKSIZE 8192	57	# define STACKSIZE 16384
48	#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;
49		70
50	enum {	71	enum {
51	REQ_QUIT,	72	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	73	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	79	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	80	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,	81	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	82	REQ_BUSY,
62	};	83	};
63		84
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	85	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	86	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		87
67	typedef struct aio_cb	88	typedef struct aio_cb
68	{	89	{
69	struct aio_cb grp, grp_prev, *grp_next;
70
71	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
72
73	SV self; / the perl counterpart of this request, if any */
74		91
75	SV data, callback;	92	SV data, callback;
76	SV fh, fh2;	93	SV fh, fh2;
77	void dataptr, data2ptr;	94	void dataptr, data2ptr;
78	Stat_t *statdata;	95	Stat_t *statdata;
79	off_t offset;	96	off_t offset;
80	size_t length;	97	size_t length;
81	ssize_t result;	98	ssize_t result;
82		99
		100	STRLEN dataoffset;
83	int type;	101	int type;
84	int fd, fd2;	102	int fd, fd2;
85	int errorno;	103	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */	104	mode_t mode; /* open */
		105
88	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;
89	} aio_cb;	111	} aio_cb;
		112
		113	enum {
		114	FLAG_CANCELLED = 0x01,
		115	};
90		116
91	typedef aio_cb *aio_req;	117	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	118	typedef aio_cb *aio_req_ornot;
93	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;
94		130
95	static int started, wanted;	131	static int started, wanted;
96	static volatile int nreqs;	132	static volatile int nreqs;
97	static int max_outstanding = 1<<30;
98	static int respipe [2];	133	static int respipe [2];
99		134
		135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		137	#else
		138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		139	#endif
		140
		141	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		142	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		143
		144	/* worker threasd management */
		145	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		146
		147	typedef struct worker {
		148	/* locked by wrklock */
		149	struct worker prev, next;
		150
		151	pthread_t tid;
		152
		153	/* locked by reslock, reqlock or wrklock */
		154	aio_req req; /* currently processed request */
		155	void *dbuf;
		156	DIR *dirp;
		157	} worker;
		158
		159	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		160
		161	static void worker_clear (worker *wrk)
		162	{
		163	if (wrk->dirp)
		164	{
		165	closedir (wrk->dirp);
		166	wrk->dirp = 0;
		167	}
		168
		169	if (wrk->dbuf)
		170	{
		171	free (wrk->dbuf);
		172	wrk->dbuf = 0;
		173	}
		174	}
		175
		176	static void worker_free (worker *wrk)
		177	{
		178	wrk->next->prev = wrk->prev;
		179	wrk->prev->next = wrk->next;
		180
		181	free (wrk);
		182	}
		183
100	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
101	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
102	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
103		187
104	static volatile aio_req reqs, reqe; /* queue start, queue end */	188	/*
105	static volatile aio_req ress, rese; /* queue start, queue end */	189	* a somewhat faster data structure might be nice, but
		190	* with 8 priorities this actually needs <20 insns
		191	* per shift, the most expensive operation.
		192	*/
		193	typedef struct {
		194	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		195	int size;
		196	} reqq;
106		197
		198	static reqq req_queue;
		199	static reqq res_queue;
		200
		201	int reqq_push (reqq *q, aio_req req)
		202	{
		203	int pri = req->pri;
		204	req->next = 0;
		205
		206	if (q->qe[pri])
		207	{
		208	q->qe[pri]->next = req;
		209	q->qe[pri] = req;
		210	}
		211	else
		212	q->qe[pri] = q->qs[pri] = req;
		213
		214	return q->size++;
		215	}
		216
		217	aio_req reqq_shift (reqq *q)
		218	{
		219	int pri;
		220
		221	if (!q->size)
		222	return 0;
		223
		224	--q->size;
		225
		226	for (pri = NUM_PRI; pri--; )
		227	{
		228	aio_req req = q->qs[pri];
		229
		230	if (req)
		231	{
		232	if (!(q->qs[pri] = req->next))
		233	q->qe[pri] = 0;
		234
		235	return req;
		236	}
		237	}
		238
		239	abort ();
		240	}
		241
		242	static int poll_cb ();
		243	static void req_invoke (aio_req req);
107	static void req_free (aio_req req);	244	static void req_free (aio_req req);
		245	static void req_cancel (aio_req req);
108		246
109	/* must be called at most once */	247	/* must be called at most once */
110	static SV req_sv (aio_req req, const char klass)	248	static SV req_sv (aio_req req, const char klass)
111	{	249	{
		250	if (!req->self)
		251	{
112	req->self = (SV *)newHV ();	252	req->self = (SV *)newHV ();
113	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		254	}
114		255
115	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	256	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
116	}	257	}
117		258
118	static aio_req SvAIO_REQ (SV *sv)	259	static aio_req SvAIO_REQ (SV *sv)
119	{	260	{
		261	MAGIC *mg;
		262
120	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))	263	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
121	croak ("object of class " AIO_REQ_KLASS " expected");	264	croak ("object of class " AIO_REQ_KLASS " expected");
122		265
123	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	266	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
124		267
125	return mg ? (aio_req)mg->mg_ptr : 0;	268	return mg ? (aio_req)mg->mg_ptr : 0;
126	}	269	}
127		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
128	static void poll_wait ()	317	static void poll_wait ()
129	{	318	{
130	if (nreqs && !ress)
131	{
132	fd_set rfd;	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
133	FD_ZERO(&rfd);	335	FD_ZERO(&rfd);
134	FD_SET(respipe [0], &rfd);	336	FD_SET(respipe [0], &rfd);
135		337
136	select (respipe [0] + 1, &rfd, 0, 0, 0);	338	select (respipe [0] + 1, &rfd, 0, 0, 0);
137	}	339	}
138	}	340	}
139		341
140	static void req_invoke (aio_req req)	342	static void req_invoke (aio_req req)
141	{	343	{
142	dSP;	344	dSP;
143	int errorno = errno;
144		345
145	if (req->cancelled \|\| !SvOK (req->callback))	346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
146	return;	347	{
147
148	errno = req->errorno;	348	errno = req->errorno;
149		349
150	ENTER;	350	ENTER;
		351	SAVETMPS;
151	PUSHMARK (SP);	352	PUSHMARK (SP);
		353	EXTEND (SP, 1);
152		354
153	switch (req->type)	355	switch (req->type)
154	{
155	case REQ_READDIR:
156	{	356	{
157	SV *rv = &PL_sv_undef;	357	case REQ_READDIR:
158
159	if (req->result >= 0)
160	{	358	{
161	char *buf = req->data2ptr;	359	SV *rv = &PL_sv_undef;
162	AV *av = newAV ();
163		360
164	while (req->result)	361	if (req->result >= 0)
165	{	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	{
166	SV *sv = newSVpv (buf, 0);	371	SV *sv = newSVpv (buf, 0);
167		372
168	av_push (av, sv);	373	av_store (av, i, sv);
169	buf += SvCUR (sv) + 1;	374	buf += SvCUR (sv) + 1;
170	req->result--;	375	}
		376
		377	rv = sv_2mortal (newRV_noinc ((SV *)av));
171	}	378	}
172		379
173	rv = sv_2mortal (newRV_noinc ((SV *)av));	380	PUSHs (rv);
174	}	381	}
		382	break;
175		383
176	XPUSHs (rv);	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;
177	}	422	}
178	break;
179		423
180	case REQ_OPEN:
181	{
182	/* convert fd to fh */
183	SV *fh;
184		424
185	XPUSHs (sv_2mortal (newSViv (req->result)));
186	PUTBACK;	425	PUTBACK;
187	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
188	SPAGAIN;
189
190	fh = SvREFCNT_inc (POPs);
191
192	PUSHMARK (SP);
193	XPUSHs (sv_2mortal (fh));
194	}
195	break;
196
197	case REQ_SLEEP:
198	case REQ_GROUP:
199	break;
200
201	default:
202	XPUSHs (sv_2mortal (newSViv (req->result)));
203	break;
204	}
205
206
207	PUTBACK;
208	call_sv (req->callback, G_VOID \| G_EVAL);	426	call_sv (req->callback, G_VOID \| G_EVAL);
209	SPAGAIN;	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	}
210		446
211	if (SvTRUE (ERRSV))	447	if (SvTRUE (ERRSV))
212	{	448	{
213	req_free (req);	449	req_free (req);
214	croak (0);	450	croak (0);
215	}	451	}
216
217	LEAVE;
218
219	errno = errorno;
220	}	452	}
221		453
222	static void req_free (aio_req req)	454	static void req_free (aio_req req)
223	{	455	{
224	if (req->grp)
225	{
226	aio_req grp = req->grp;
227
228	/* unlink request */
229	req->grp_next->grp_prev = req->grp_prev;
230	req->grp_prev->grp_next = req->grp_next;
231
232	if (grp->grp_next == grp)
233	{
234	req_invoke (grp);
235	req_free (grp);
236	}
237	}
238
239	if (req->self)	456	if (req->self)
240	{	457	{
241	sv_unmagic (req->self, PERL_MAGIC_ext);	458	sv_unmagic (req->self, PERL_MAGIC_ext);
242	SvREFCNT_dec (req->self);	459	SvREFCNT_dec (req->self);
243	}	460	}
244		461
245	if (req->data)
246	SvREFCNT_dec (req->data);	462	SvREFCNT_dec (req->data);
247
248	if (req->fh)
249	SvREFCNT_dec (req->fh);	463	SvREFCNT_dec (req->fh);
250
251	if (req->fh2)
252	SvREFCNT_dec (req->fh2);	464	SvREFCNT_dec (req->fh2);
253
254	if (req->statdata)
255	Safefree (req->statdata);
256
257	if (req->callback)
258	SvREFCNT_dec (req->callback);	465	SvREFCNT_dec (req->callback);
		466	Safefree (req->statdata);
259		467
260	if (req->type == REQ_READDIR && req->result >= 0)	468	if (req->type == REQ_READDIR)
261	free (req->data2ptr);	469	free (req->data2ptr);
262		470
263	Safefree (req);	471	Safefree (req);
264	}	472	}
265		473
		474	static void req_cancel_subs (aio_req grp)
		475	{
		476	aio_req sub;
		477
		478	if (grp->type != REQ_GROUP)
		479	return;
		480
		481	SvREFCNT_dec (grp->fh2);
		482	grp->fh2 = 0;
		483
		484	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		485	req_cancel (sub);
		486	}
		487
266	static void req_cancel (aio_req req)	488	static void req_cancel (aio_req req)
267	{	489	{
268	req->cancelled = 1;	490	req->flags \|= FLAG_CANCELLED;
269		491
270	if (req->type == REQ_GROUP)	492	req_cancel_subs (req);
271	{
272	aio_req sub;
273
274	for (sub = req->grp_next; sub != req; sub = sub->grp_next)
275	req_cancel (sub);
276	}
277	}	493	}
278		494
279	static int poll_cb ()	495	static int poll_cb ()
280	{	496	{
281	dSP;	497	dSP;
…		…
283	int do_croak = 0;	499	int do_croak = 0;
284	aio_req req;	500	aio_req req;
285		501
286	for (;;)	502	for (;;)
287	{	503	{
288	pthread_mutex_lock (&reslock);	504	LOCK (reslock);
289	req = ress;	505	req = reqq_shift (&res_queue);
290		506
291	if (req)	507	if (req)
292	{	508	{
293	ress = req->next;
294
295	if (!ress)	509	if (!res_queue.size)
296	{	510	{
297	/* read any signals sent by the worker threads */	511	/* read any signals sent by the worker threads */
298	char buf [32];	512	char buf [32];
299	while (read (respipe [0], buf, 32) == 32)	513	while (read (respipe [0], buf, 32) == 32)
300	;	514	;
301
302	rese = 0;
303	}	515	}
304	}	516	}
305		517
306	pthread_mutex_unlock (&reslock);	518	UNLOCK (reslock);
307		519
308	if (!req)	520	if (!req)
309	break;	521	break;
310		522
311	nreqs--;	523	--nreqs;
312		524
313	if (req->type == REQ_QUIT)	525	if (req->type == REQ_QUIT)
314	started--;	526	started--;
315	else if (req->type == REQ_GROUP && req->grp_next != req)	527	else if (req->type == REQ_GROUP && req->length)
		528	{
		529	req->fd = 1; /* mark request as delayed */
316	continue;	530	continue;
		531	}
317	else	532	else
318	{	533	{
319	if (req->type == REQ_READ)	534	if (req->type == REQ_READ)
320	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));
321		536
…		…
343	static void aio_proc(void arg);	558	static void aio_proc(void arg);
344		559
345	static void start_thread (void)	560	static void start_thread (void)
346	{	561	{
347	sigset_t fullsigset, oldsigset;	562	sigset_t fullsigset, oldsigset;
348	pthread_t tid;
349	pthread_attr_t attr;	563	pthread_attr_t attr;
		564
		565	worker *wrk = calloc (1, sizeof (worker));
		566
		567	if (!wrk)
		568	croak ("unable to allocate worker thread data");
350		569
351	pthread_attr_init (&attr);	570	pthread_attr_init (&attr);
352	pthread_attr_setstacksize (&attr, STACKSIZE);	571	pthread_attr_setstacksize (&attr, STACKSIZE);
353	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
354		573
355	sigfillset (&fullsigset);	574	sigfillset (&fullsigset);
		575
		576	LOCK (wrklock);
356	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
357		578
358	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;
359	started++;	585	started++;
		586	}
		587	else
		588	free (wrk);
360		589
361	sigprocmask (SIG_SETMASK, &oldsigset, 0);	590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		591	UNLOCK (wrklock);
362	}	592	}
363		593
364	static void req_send (aio_req req)	594	static void req_send (aio_req req)
365	{	595	{
366	while (started < wanted && nreqs >= started)	596	while (started < wanted && nreqs >= started)
367	start_thread ();	597	start_thread ();
368		598
369	nreqs++;	599	++nreqs;
370		600
371	pthread_mutex_lock (&reqlock);	601	LOCK (reqlock);
372		602	reqq_push (&req_queue, req);
373	req->next = 0;
374
375	if (reqe)
376	{
377	reqe->next = req;
378	reqe = req;
379	}
380	else
381	reqe = reqs = req;
382
383	pthread_cond_signal (&reqwait);	603	pthread_cond_signal (&reqwait);
384	pthread_mutex_unlock (&reqlock);	604	UNLOCK (reqlock);
385
386	if (nreqs > max_outstanding)
387	for (;;)
388	{
389	poll_cb ();
390
391	if (nreqs <= max_outstanding)
392	break;
393
394	poll_wait ();
395	}
396	}	605	}
397		606
398	static void end_thread (void)	607	static void end_thread (void)
399	{	608	{
400	aio_req req;	609	aio_req req;
		610
401	Newz (0, req, 1, aio_cb);	611	Newz (0, req, 1, aio_cb);
		612
402	req->type = REQ_QUIT;	613	req->type = REQ_QUIT;
		614	req->pri = PRI_MAX + PRI_BIAS;
403		615
404	req_send (req);	616	req_send (req);
405	}	617	}
406		618
407	static void min_parallel (int nthreads)	619	static void min_parallel (int nthreads)
…		…
459	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
460	{	672	{
461	ssize_t res;	673	ssize_t res;
462	off_t ooffset;	674	off_t ooffset;
463		675
464	pthread_mutex_lock (&preadwritelock);	676	LOCK (preadwritelock);
465	ooffset = lseek (fd, 0, SEEK_CUR);	677	ooffset = lseek (fd, 0, SEEK_CUR);
466	lseek (fd, offset, SEEK_SET);	678	lseek (fd, offset, SEEK_SET);
467	res = read (fd, buf, count);	679	res = read (fd, buf, count);
468	lseek (fd, ooffset, SEEK_SET);	680	lseek (fd, ooffset, SEEK_SET);
469	pthread_mutex_unlock (&preadwritelock);	681	UNLOCK (preadwritelock);
470		682
471	return res;	683	return res;
472	}	684	}
473		685
474	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	686	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
475	{	687	{
476	ssize_t res;	688	ssize_t res;
477	off_t ooffset;	689	off_t ooffset;
478		690
479	pthread_mutex_lock (&preadwritelock);	691	LOCK (preadwritelock);
480	ooffset = lseek (fd, 0, SEEK_CUR);	692	ooffset = lseek (fd, 0, SEEK_CUR);
481	lseek (fd, offset, SEEK_SET);	693	lseek (fd, offset, SEEK_SET);
482	res = write (fd, buf, count);	694	res = write (fd, buf, count);
483	lseek (fd, offset, SEEK_SET);	695	lseek (fd, offset, SEEK_SET);
484	pthread_mutex_unlock (&preadwritelock);	696	UNLOCK (preadwritelock);
485		697
486	return res;	698	return res;
487	}	699	}
488	#endif	700	#endif
489		701
…		…
494	#if !HAVE_READAHEAD	706	#if !HAVE_READAHEAD
495	# define readahead aio_readahead	707	# define readahead aio_readahead
496		708
497	static ssize_t readahead (int fd, off_t offset, size_t count)	709	static ssize_t readahead (int fd, off_t offset, size_t count)
498	{	710	{
499	char readahead_buf[4096];	711	dBUF;
500		712
501	while (count > 0)	713	while (count > 0)
502	{	714	{
503	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
504		716
505	pread (fd, readahead_buf, len, offset);	717	pread (fd, aio_buf, len, offset);
506	offset += len;	718	offset += len;
507	count -= len;	719	count -= len;
508	}	720	}
509		721
510	errno = 0;	722	errno = 0;
…		…
519	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)	731	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
520	{	732	{
521	struct dirent *e;	733	struct dirent *e;
522	int errorno;	734	int errorno;
523		735
524	pthread_mutex_lock (&readdirlock);	736	LOCK (readdirlock);
525		737
526	e = readdir (dirp);	738	e = readdir (dirp);
527	errorno = errno;	739	errorno = errno;
528		740
529	if (e)	741	if (e)
…		…
532	strcpy (ent->d_name, e->d_name);	744	strcpy (ent->d_name, e->d_name);
533	}	745	}
534	else	746	else
535	*res = 0;	747	*res = 0;
536		748
537	pthread_mutex_unlock (&readdirlock);	749	UNLOCK (readdirlock);
538		750
539	errno = errorno;	751	errno = errorno;
540	return e ? 0 : -1;	752	return e ? 0 : -1;
541	}	753	}
542	#endif	754	#endif
543		755
544	/* sendfile always needs emulation */	756	/* sendfile always needs emulation */
545	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	757	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
546	{	758	{
547	ssize_t res;	759	ssize_t res;
548		760
549	if (!count)	761	if (!count)
550	return 0;	762	return 0;
…		…
599	#endif	811	#endif
600	)	812	)
601	)	813	)
602	{	814	{
603	/* emulate sendfile. this is a major pain in the ass */	815	/* emulate sendfile. this is a major pain in the ass */
604	char buf[4096];	816	dBUF;
		817
605	res = 0;	818	res = 0;
606		819
607	while (count)	820	while (count)
608	{	821	{
609	ssize_t cnt;	822	ssize_t cnt;
610		823
611	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
612		825
613	if (cnt <= 0)	826	if (cnt <= 0)
614	{	827	{
615	if (cnt && !res) res = -1;	828	if (cnt && !res) res = -1;
616	break;	829	break;
617	}	830	}
618		831
619	cnt = write (ofd, buf, cnt);	832	cnt = write (ofd, aio_buf, cnt);
620		833
621	if (cnt <= 0)	834	if (cnt <= 0)
622	{	835	{
623	if (cnt && !res) res = -1;	836	if (cnt && !res) res = -1;
624	break;	837	break;
…		…
632		845
633	return res;	846	return res;
634	}	847	}
635		848
636	/* read a full directory */	849	/* read a full directory */
637	static int scandir_ (const char path, void *namesp)	850	static void scandir_ (aio_req req, worker *self)
638	{	851	{
639	DIR *dirp = opendir (path);	852	DIR *dirp;
640	union	853	union
641	{	854	{
642	struct dirent d;	855	struct dirent d;
643	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
644	} u;	857	} *u;
645	struct dirent *entp;	858	struct dirent *entp;
646	char name, names;	859	char name, names;
647	int memlen = 4096;	860	int memlen = 4096;
648	int memofs = 0;	861	int memofs = 0;
649	int res = 0;	862	int res = 0;
650	int errorno;	863	int errorno;
651		864
652	if (!dirp)	865	LOCK (wrklock);
653	return -1;	866	self->dirp = dirp = opendir (req->dataptr);
		867	self->dbuf = u = malloc (sizeof (*u));
		868	UNLOCK (wrklock);
654		869
655	names = malloc (memlen);	870	req->data2ptr = names = malloc (memlen);
656		871
		872	if (dirp && u && names)
657	for (;;)	873	for (;;)
658	{	874	{
		875	errno = 0;
659	errno = 0, readdir_r (dirp, &u.d, &entp);	876	readdir_r (dirp, &u->d, &entp);
660		877
661	if (!entp)	878	if (!entp)
662	break;	879	break;
663		880
664	name = entp->d_name;	881	name = entp->d_name;
665		882
666	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))	883	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
667	{	884	{
668	int len = strlen (name) + 1;	885	int len = strlen (name) + 1;
669		886
670	res++;	887	res++;
671		888
672	while (memofs + len > memlen)	889	while (memofs + len > memlen)
673	{	890	{
674	memlen *= 2;	891	memlen *= 2;
		892	LOCK (wrklock);
675	names = realloc (names, memlen);	893	req->data2ptr = names = realloc (names, memlen);
		894	UNLOCK (wrklock);
		895
676	if (!names)	896	if (!names)
677	break;	897	break;
678	}	898	}
679		899
680	memcpy (names + memofs, name, len);	900	memcpy (names + memofs, name, len);
681	memofs += len;	901	memofs += len;
682	}	902	}
683	}	903	}
684		904
685	errorno = errno;
686	closedir (dirp);
687
688	if (errorno)	905	if (errno)
689	{
690	free (names);
691	errno = errorno;
692	res = -1;	906	res = -1;
693	}	907
694		908	req->result = res;
695	namesp = (void )names;
696	return res;
697	}	909	}
698		910
699	/*****************************************************************************/	911	/*****************************************************************************/
700		912
701	static void aio_proc (void thr_arg)	913	static void aio_proc (void thr_arg)
702	{	914	{
703	aio_req req;	915	aio_req req;
704	int type;	916	int type;
		917	worker self = (worker )thr_arg;
705		918
706	do	919	do
707	{	920	{
708	pthread_mutex_lock (&reqlock);	921	LOCK (reqlock);
709		922
710	for (;;)	923	for (;;)
711	{	924	{
712	req = reqs;	925	self->req = req = reqq_shift (&req_queue);
713
714	if (reqs)
715	{
716	reqs = reqs->next;
717	if (!reqs) reqe = 0;
718	}
719		926
720	if (req)	927	if (req)
721	break;	928	break;
722		929
723	pthread_cond_wait (&reqwait, &reqlock);	930	pthread_cond_wait (&reqwait, &reqlock);
724	}	931	}
725		932
726	pthread_mutex_unlock (&reqlock);	933	UNLOCK (reqlock);
727		934
728	errno = 0; /* strictly unnecessary */	935	errno = 0; /* strictly unnecessary */
		936	type = req->type; /* remember type for QUIT check */
729		937
730	if (!req->cancelled)	938	if (!(req->flags & FLAG_CANCELLED))
731	switch (req->type)	939	switch (type)
732	{	940	{
733	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	941	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
734	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	942	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
735		943
736	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	944	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
737	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
738		946
739	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
740	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
741	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
742		950
…		…
748	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	956	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
749	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
750		958
751	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
752	case REQ_FSYNC: req->result = fsync (req->fd); break;	960	case REQ_FSYNC: req->result = fsync (req->fd); break;
753	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	961	case REQ_READDIR: scandir_ (req, self); break;
754		962
755	case REQ_SLEEP:	963	case REQ_BUSY:
756	{	964	{
757	struct timeval tv;	965	struct timeval tv;
758		966
759	tv.tv_sec = req->fd;	967	tv.tv_sec = req->fd;
760	tv.tv_usec = req->fd2;	968	tv.tv_usec = req->fd2;
761		969
762	req->result = select (0, 0, 0, 0, &tv);	970	req->result = select (0, 0, 0, 0, &tv);
763	}	971	}
764		972
		973	case REQ_GROUP:
		974	case REQ_NOP:
765	case REQ_QUIT:	975	case REQ_QUIT:
766	break;	976	break;
767		977
768	default:	978	default:
769	req->result = ENOSYS;	979	req->result = ENOSYS;
770	break;	980	break;
771	}	981	}
772		982
773	req->errorno = errno;	983	req->errorno = errno;
774		984
775	pthread_mutex_lock (&reslock);	985	LOCK (reslock);
776		986
777	req->next = 0;	987	if (!reqq_push (&res_queue, req))
778
779	if (rese)
780	{
781	rese->next = req;
782	rese = req;
783	}
784	else
785	{
786	rese = ress = req;
787
788	/* write a dummy byte to the pipe so fh becomes ready */	988	/* write a dummy byte to the pipe so fh becomes ready */
789	write (respipe [1], &respipe, 1);	989	write (respipe [1], &respipe, 1);
790	}
791		990
792	pthread_mutex_unlock (&reslock);	991	self->req = 0;
		992	worker_clear (self);
		993
		994	UNLOCK (reslock);
793	}	995	}
794	while (type != REQ_QUIT);	996	while (type != REQ_QUIT);
795		997
		998	LOCK (wrklock);
		999	worker_free (self);
		1000	UNLOCK (wrklock);
		1001
796	return 0;	1002	return 0;
797	}	1003	}
798		1004
799	/*****************************************************************************/	1005	/*****************************************************************************/
800		1006
801	static void atfork_prepare (void)	1007	static void atfork_prepare (void)
802	{	1008	{
803	pthread_mutex_lock (&reqlock);	1009	LOCK (wrklock);
804	pthread_mutex_lock (&reslock);	1010	LOCK (reqlock);
		1011	LOCK (reslock);
805	#if !HAVE_PREADWRITE	1012	#if !HAVE_PREADWRITE
806	pthread_mutex_lock (&preadwritelock);	1013	LOCK (preadwritelock);
807	#endif	1014	#endif
808	#if !HAVE_READDIR_R	1015	#if !HAVE_READDIR_R
809	pthread_mutex_lock (&readdirlock);	1016	LOCK (readdirlock);
810	#endif	1017	#endif
811	}	1018	}
812		1019
813	static void atfork_parent (void)	1020	static void atfork_parent (void)
814	{	1021	{
815	#if !HAVE_READDIR_R	1022	#if !HAVE_READDIR_R
816	pthread_mutex_unlock (&readdirlock);	1023	UNLOCK (readdirlock);
817	#endif	1024	#endif
818	#if !HAVE_PREADWRITE	1025	#if !HAVE_PREADWRITE
819	pthread_mutex_unlock (&preadwritelock);	1026	UNLOCK (preadwritelock);
820	#endif	1027	#endif
821	pthread_mutex_unlock (&reslock);	1028	UNLOCK (reslock);
822	pthread_mutex_unlock (&reqlock);	1029	UNLOCK (reqlock);
		1030	UNLOCK (wrklock);
823	}	1031	}
824		1032
825	static void atfork_child (void)	1033	static void atfork_child (void)
826	{	1034	{
827	aio_req prv;	1035	aio_req prv;
828		1036
		1037	while (prv = reqq_shift (&req_queue))
		1038	req_free (prv);
		1039
		1040	while (prv = reqq_shift (&res_queue))
		1041	req_free (prv);
		1042
		1043	while (wrk_first.next != &wrk_first)
		1044	{
		1045	worker *wrk = wrk_first.next;
		1046
		1047	if (wrk->req)
		1048	req_free (wrk->req);
		1049
		1050	worker_clear (wrk);
		1051	worker_free (wrk);
		1052	}
		1053
829	started = 0;	1054	started = 0;
830		1055	nreqs = 0;
831	while (reqs)
832	{
833	prv = reqs;
834	reqs = prv->next;
835	req_free (prv);
836	}
837
838	reqs = reqe = 0;
839
840	while (ress)
841	{
842	prv = ress;
843	ress = prv->next;
844	req_free (prv);
845	}
846
847	ress = rese = 0;
848		1056
849	close (respipe [0]);	1057	close (respipe [0]);
850	close (respipe [1]);	1058	close (respipe [1]);
851	create_pipe ();	1059	create_pipe ();
852		1060
853	atfork_parent ();	1061	atfork_parent ();
854	}	1062	}
855		1063
856	#define dREQ \	1064	#define dREQ \
857	aio_req req; \	1065	aio_req req; \
		1066	int req_pri = next_pri; \
		1067	next_pri = DEFAULT_PRI + PRI_BIAS; \
858	\	1068	\
859	if (SvOK (callback) && !SvROK (callback)) \	1069	if (SvOK (callback) && !SvROK (callback)) \
860	croak ("callback must be undef or of reference type"); \	1070	croak ("callback must be undef or of reference type"); \
861	\	1071	\
862	Newz (0, req, 1, aio_cb); \	1072	Newz (0, req, 1, aio_cb); \
863	if (!req) \	1073	if (!req) \
864	croak ("out of memory during aio_req allocation"); \	1074	croak ("out of memory during aio_req allocation"); \
865	\	1075	\
866	req->callback = newSVsv (callback)	1076	req->callback = newSVsv (callback); \
		1077	req->pri = req_pri
867		1078
868	#define REQ_SEND \	1079	#define REQ_SEND \
869	req_send (req); \	1080	req_send (req); \
870	\	1081	\
871	if (GIMME_V != G_VOID) \	1082	if (GIMME_V != G_VOID) \
…		…
893		1104
894	void	1105	void
895	max_parallel (nthreads)	1106	max_parallel (nthreads)
896	int nthreads	1107	int nthreads
897	PROTOTYPE: $	1108	PROTOTYPE: $
898
899	int
900	max_outstanding (nreqs)
901	int nreqs
902	PROTOTYPE: $
903	CODE:
904	RETVAL = max_outstanding;
905	max_outstanding = nreqs;
906		1109
907	void	1110	void
908	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
909	SV * pathname	1112	SV * pathname
910	int flags	1113	int flags
…		…
1125		1328
1126	REQ_SEND;	1329	REQ_SEND;
1127	}	1330	}
1128		1331
1129	void	1332	void
1130	aio_sleep (delay,callback=&PL_sv_undef)	1333	aio_busy (delay,callback=&PL_sv_undef)
1131	double delay	1334	double delay
1132	SV * callback	1335	SV * callback
1133	PPCODE:	1336	PPCODE:
1134	{	1337	{
1135	dREQ;	1338	dREQ;
1136		1339
1137	req->type = REQ_SLEEP;	1340	req->type = REQ_BUSY;
1138	req->fd = delay < 0. ? 0 : delay;	1341	req->fd = delay < 0. ? 0 : delay;
1139	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1342	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1140		1343
1141	REQ_SEND;	1344	REQ_SEND;
1142	}	1345	}
1143		1346
1144	void	1347	void
1145	aio_group (callback=&PL_sv_undef)	1348	aio_group (callback=&PL_sv_undef)
1146	SV * callback	1349	SV * callback
1147	PROTOTYPE: ;&	1350	PROTOTYPE: ;$
1148	PPCODE:	1351	PPCODE:
1149	{	1352	{
1150	dREQ;	1353	dREQ;
		1354
1151	req->type = REQ_GROUP;	1355	req->type = REQ_GROUP;
1152	req->grp_next = req;
1153	req->grp_prev = req;
1154
1155	req_send (req);	1356	req_send (req);
		1357
1156	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1157	}	1359	}
		1360
		1361	void
		1362	aio_nop (callback=&PL_sv_undef)
		1363	SV * callback
		1364	PPCODE:
		1365	{
		1366	dREQ;
		1367
		1368	req->type = REQ_NOP;
		1369
		1370	REQ_SEND;
		1371	}
		1372
		1373	void
		1374	aioreq_pri (int pri = DEFAULT_PRI)
		1375	CODE:
		1376	if (pri < PRI_MIN) pri = PRI_MIN;
		1377	if (pri > PRI_MAX) pri = PRI_MAX;
		1378	next_pri = pri + PRI_BIAS;
		1379
		1380	void
		1381	aioreq_nice (int nice = 0)
		1382	CODE:
		1383	nice = next_pri - nice;
		1384	if (nice < PRI_MIN) nice = PRI_MIN;
		1385	if (nice > PRI_MAX) nice = PRI_MAX;
		1386	next_pri = nice + PRI_BIAS;
1158		1387
1159	void	1388	void
1160	flush ()	1389	flush ()
1161	PROTOTYPE:	1390	PROTOTYPE:
1162	CODE:	1391	CODE:
…		…
1205	CODE:	1434	CODE:
1206	RETVAL = nreqs;	1435	RETVAL = nreqs;
1207	OUTPUT:	1436	OUTPUT:
1208	RETVAL	1437	RETVAL
1209		1438
		1439	PROTOTYPES: DISABLE
		1440
1210	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1441	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1211		1442
1212	void	1443	void
1213	cancel (aio_req_ornot req)	1444	cancel (aio_req_ornot req)
1214	PROTOTYPE:
1215	CODE:	1445	CODE:
1216	req_cancel (req);	1446	req_cancel (req);
1217		1447
		1448	void
		1449	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1450	CODE:
		1451	SvREFCNT_dec (req->callback);
		1452	req->callback = newSVsv (callback);
		1453
1218	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1219		1455
1220	void	1456	void
1221	add (aio_req grp, ...)	1457	add (aio_req grp, ...)
1222	PROTOTYPE: $;@
1223	PPCODE:	1458	PPCODE:
1224	{	1459	{
1225	int i;	1460	int i;
		1461	aio_req req;
		1462
		1463	if (grp->fd == 2)
		1464	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1226		1465
1227	for (i = 1; i < items; ++i )	1466	for (i = 1; i < items; ++i )
1228	{	1467	{
1229	aio_req req = SvAIO_REQ (ST (i));
1230
1231	req->grp_prev = grp;
1232	req->grp_next = grp->grp_next;
1233	grp->grp_next->grp_prev = req;
1234	grp->grp_next = req;
1235
1236	req->grp = grp;
1237
1238	if (GIMME_V != G_VOID)	1468	if (GIMME_V != G_VOID)
1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1469	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1470
		1471	req = SvAIO_REQ (ST (i));
		1472
		1473	if (req)
		1474	{
		1475	++grp->length;
		1476	req->grp = grp;
		1477
		1478	req->grp_prev = 0;
		1479	req->grp_next = grp->grp_first;
		1480
		1481	if (grp->grp_first)
		1482	grp->grp_first->grp_prev = req;
		1483
		1484	grp->grp_first = req;
		1485	}
1240	}	1486	}
1241	}	1487	}
1242		1488
		1489	void
		1490	cancel_subs (aio_req_ornot req)
		1491	CODE:
		1492	req_cancel_subs (req);
		1493
		1494	void
		1495	result (aio_req grp, ...)
		1496	CODE:
		1497	{
		1498	int i;
		1499	AV *av = newAV ();
		1500
		1501	for (i = 1; i < items; ++i )
		1502	av_push (av, newSVsv (ST (i)));
		1503
		1504	SvREFCNT_dec (grp->data);
		1505	grp->data = (SV *)av;
		1506	}
		1507
		1508	void
		1509	limit (aio_req grp, int limit)
		1510	CODE:
		1511	grp->fd2 = limit;
		1512	aio_grp_feed (grp);
		1513
		1514	void
		1515	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1516	CODE:
		1517	{
		1518	SvREFCNT_dec (grp->fh2);
		1519	grp->fh2 = newSVsv (callback);
		1520
		1521	if (grp->fd2 <= 0)
		1522	grp->fd2 = 2;
		1523
		1524	aio_grp_feed (grp);
		1525	}
		1526

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC vs. Revision 1.74 by root, Wed Oct 25 17:57:30 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.45 by root, Sun Oct 22 00:19:05 2006 UTC vs.
Revision 1.74 by root, Wed Oct 25 17:57:30 2006 UTC