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

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs.
Revision 1.71 by root, Tue Oct 24 16:35:04 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,
		81	REQ_GROUP, REQ_NOP,
		82	REQ_BUSY,
58	};	83	};
59		84
60	#define AIO_CB_KLASS "IO::AIO::CB"	85	#define AIO_REQ_KLASS "IO::AIO::REQ"
		86	#define AIO_GRP_KLASS "IO::AIO::GRP"
61		87
62	typedef struct aio_cb	88	typedef struct aio_cb
63	{	89	{
64	struct aio_cb grp_prev, grp_next;
65	struct aio_grp *grp;
66
67	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
68
69	SV self; / the perl counterpart of this request, if any */
70		91
71	SV data, callback;	92	SV data, callback;
72	SV fh, fh2;	93	SV fh, fh2;
73	void dataptr, data2ptr;	94	void dataptr, data2ptr;
74	Stat_t *statdata;	95	Stat_t *statdata;
75	off_t offset;	96	off_t offset;
76	size_t length;	97	size_t length;
77	ssize_t result;	98	ssize_t result;
78		99
		100	STRLEN dataoffset;
79	int type;	101	int type;
80	int fd, fd2;	102	int fd, fd2;
81	int errorno;	103	int errorno;
82	STRLEN dataoffset;
83	mode_t mode; /* open */	104	mode_t mode; /* open */
		105
84	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;
85	} aio_cb;	111	} aio_cb;
		112
		113	enum {
		114	FLAG_CANCELLED = 0x01,
		115	};
86		116
87	typedef aio_cb *aio_req;	117	typedef aio_cb *aio_req;
88	typedef aio_cb *aio_req_ornot;	118	typedef aio_cb *aio_req_ornot;
		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;
89		130
90	static int started, wanted;	131	static int started, wanted;
91	static volatile int nreqs;	132	static volatile int nreqs;
92	static int max_outstanding = 1<<30;	133	static int max_outstanding = 1<<30;
93	static int respipe [2];	134	static int respipe [2];
94		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
95	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
96	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	186	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
97	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	187	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
98		188
99	static volatile aio_req reqs, reqe; /* queue start, queue end */	189	/*
100	static volatile aio_req ress, rese; /* queue start, queue end */	190	* a somewhat faster data structure might be nice, but
101		191	* with 8 priorities this actually needs <20 insns
		192	* per shift, the most expensive operation.
		193	*/
102	typedef struct aio_grp	194	typedef struct {
103	{	195	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
104	struct aio_cb first, last;	196	int size;
105	SV *callback;	197	} reqq;
106	int busycount;
107	} aio_grp;
108		198
109	static void aio_grp_begin (aio_grp *grp)	199	static reqq req_queue;
110	{	200	static reqq res_queue;
111	++grp->busycount;
112	}
113		201
114	static void aio_grp_end (aio_grp *grp)	202	int reqq_push (reqq *q, aio_req req)
115	{	203	{
116	--grp->busycount;	204	int pri = req->pri;
		205	req->next = 0;
117		206
118	if (grp->busycount)	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)
119	return;	223	return 0;
120		224
121	SvREFCNT_dec (grp->callback);	225	--q->size;
122	grp->callback = 0;
123	}
124		226
125	static aio_grp *aio_grp_new ()	227	for (pri = NUM_PRI; pri--; )
126	{	228	{
127	aio_grp *grp;	229	aio_req req = q->qs[pri];
128		230
129	Newz (0, grp, 1, aio_grp);	231	if (req)
130	aio_grp_begin (grp);	232	{
		233	if (!(q->qs[pri] = req->next))
		234	q->qe[pri] = 0;
131		235
132	return grp;	236	return req;
		237	}
		238	}
		239
		240	abort ();
133	}	241	}
		242
		243	static void req_invoke (aio_req req);
		244	static void req_free (aio_req req);
134		245
135	/* must be called at most once */	246	/* must be called at most once */
136	static SV *req_sv (aio_req req)	247	static SV req_sv (aio_req req, const char klass)
137	{	248	{
		249	if (!req->self)
		250	{
138	req->self = (SV *)newHV ();	251	req->self = (SV *)newHV ();
139	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	252	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		253	}
140		254
141	return sv_bless (newRV_noinc (req->self), gv_stashpv (AIO_CB_KLASS, 1));	255	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
142	}	256	}
143		257
144	static aio_req SvAIO_REQ (SV *sv)	258	static aio_req SvAIO_REQ (SV *sv)
145	{	259	{
		260	MAGIC *mg;
		261
146	if (!sv_derived_from (sv, AIO_CB_KLASS) \|\| !SvROK (sv))	262	if (!sv_derived_from (sv, AIO_REQ_KLASS) \|\| !SvROK (sv))
147	croak ("object of class " AIO_CB_KLASS " expected");	263	croak ("object of class " AIO_REQ_KLASS " expected");
148		264
149	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	265	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
150		266
151	return mg ? (aio_req)mg->mg_ptr : 0;	267	return mg ? (aio_req)mg->mg_ptr : 0;
		268	}
		269
		270	static void aio_grp_feed (aio_req grp)
		271	{
		272	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		273	{
		274	int old_len = grp->length;
		275
		276	if (grp->fh2 && SvOK (grp->fh2))
		277	{
		278	dSP;
		279
		280	ENTER;
		281	SAVETMPS;
		282	PUSHMARK (SP);
		283	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		284	PUTBACK;
		285	call_sv (grp->fh2, G_VOID \| G_EVAL \| G_KEEPERR);
		286	SPAGAIN;
		287	FREETMPS;
		288	LEAVE;
		289	}
		290
		291	/* stop if no progress has been made */
		292	if (old_len == grp->length)
		293	{
		294	SvREFCNT_dec (grp->fh2);
		295	grp->fh2 = 0;
		296	break;
		297	}
		298	}
		299	}
		300
		301	static void aio_grp_dec (aio_req grp)
		302	{
		303	--grp->length;
		304
		305	/* call feeder, if applicable */
		306	aio_grp_feed (grp);
		307
		308	/* finish, if done */
		309	if (!grp->length && grp->fd)
		310	{
		311	req_invoke (grp);
		312	req_free (grp);
		313	}
		314	}
		315
		316	static void poll_wait ()
		317	{
		318	fd_set rfd;
		319
		320	while (nreqs)
		321	{
		322	int size;
		323	#if !(__i386 \|\| __x86_64) /* safe without sempahore on these archs */
		324	LOCK (reslock);
		325	#endif
		326	size = res_queue.size;
		327	#if !(__i386 \|\| __x86_64) /* safe without sempahore on these archs */
		328	UNLOCK (reslock);
		329	#endif
		330
		331	if (size)
		332	return;
		333
		334	FD_ZERO(&rfd);
		335	FD_SET(respipe [0], &rfd);
		336
		337	select (respipe [0] + 1, &rfd, 0, 0, 0);
		338	}
		339	}
		340
		341	static void req_invoke (aio_req req)
		342	{
		343	dSP;
		344
		345	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		346	{
		347	errno = req->errorno;
		348
		349	ENTER;
		350	SAVETMPS;
		351	PUSHMARK (SP);
		352	EXTEND (SP, 1);
		353
		354	switch (req->type)
		355	{
		356	case REQ_READDIR:
		357	{
		358	SV *rv = &PL_sv_undef;
		359
		360	if (req->result >= 0)
		361	{
		362	int i;
		363	char *buf = req->data2ptr;
		364	AV *av = newAV ();
		365
		366	av_extend (av, req->result - 1);
		367
		368	for (i = 0; i < req->result; ++i)
		369	{
		370	SV *sv = newSVpv (buf, 0);
		371
		372	av_store (av, i, sv);
		373	buf += SvCUR (sv) + 1;
		374	}
		375
		376	rv = sv_2mortal (newRV_noinc ((SV *)av));
		377	}
		378
		379	PUSHs (rv);
		380	}
		381	break;
		382
		383	case REQ_OPEN:
		384	{
		385	/* convert fd to fh */
		386	SV *fh;
		387
		388	PUSHs (sv_2mortal (newSViv (req->result)));
		389	PUTBACK;
		390	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
		391	SPAGAIN;
		392
		393	fh = SvREFCNT_inc (POPs);
		394
		395	PUSHMARK (SP);
		396	XPUSHs (sv_2mortal (fh));
		397	}
		398	break;
		399
		400	case REQ_GROUP:
		401	req->fd = 2; /* mark group as finished */
		402
		403	if (req->data)
		404	{
		405	int i;
		406	AV av = (AV )req->data;
		407
		408	EXTEND (SP, AvFILL (av) + 1);
		409	for (i = 0; i <= AvFILL (av); ++i)
		410	PUSHs (*av_fetch (av, i, 0));
		411	}
		412	break;
		413
		414	case REQ_NOP:
		415	case REQ_BUSY:
		416	break;
		417
		418	default:
		419	PUSHs (sv_2mortal (newSViv (req->result)));
		420	break;
		421	}
		422
		423
		424	PUTBACK;
		425	call_sv (req->callback, G_VOID \| G_EVAL);
		426	SPAGAIN;
		427
		428	FREETMPS;
		429	LEAVE;
		430	}
		431
		432	if (req->grp)
		433	{
		434	aio_req grp = req->grp;
		435
		436	/* unlink request */
		437	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		438	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		439
		440	if (grp->grp_first == req)
		441	grp->grp_first = req->grp_next;
		442
		443	aio_grp_dec (grp);
		444	}
		445
		446	if (SvTRUE (ERRSV))
		447	{
		448	req_free (req);
		449	croak (0);
		450	}
152	}	451	}
153		452
154	static void req_free (aio_req req)	453	static void req_free (aio_req req)
155	{	454	{
156	if (req->self)	455	if (req->self)
157	{	456	{
158	sv_unmagic (req->self, PERL_MAGIC_ext);	457	sv_unmagic (req->self, PERL_MAGIC_ext);
159	SvREFCNT_dec (req->self);	458	SvREFCNT_dec (req->self);
160	}	459	}
161		460
162	if (req->data)
163	SvREFCNT_dec (req->data);	461	SvREFCNT_dec (req->data);
164
165	if (req->fh)
166	SvREFCNT_dec (req->fh);	462	SvREFCNT_dec (req->fh);
167
168	if (req->fh2)
169	SvREFCNT_dec (req->fh2);	463	SvREFCNT_dec (req->fh2);
170
171	if (req->statdata)
172	Safefree (req->statdata);
173
174	if (req->callback)
175	SvREFCNT_dec (req->callback);	464	SvREFCNT_dec (req->callback);
		465	Safefree (req->statdata);
176		466
177	if (req->type == REQ_READDIR && req->result >= 0)	467	if (req->type == REQ_READDIR)
178	free (req->data2ptr);	468	free (req->data2ptr);
179		469
180	Safefree (req);	470	Safefree (req);
181	}	471	}
182		472
183	static void	473	static void req_cancel (aio_req req)
184	poll_wait ()
185	{	474	{
186	if (nreqs && !ress)	475	req->flags \|= FLAG_CANCELLED;
187	{
188	fd_set rfd;
189	FD_ZERO(&rfd);
190	FD_SET(respipe [0], &rfd);
191		476
192	select (respipe [0] + 1, &rfd, 0, 0, 0);	477	if (req->type == REQ_GROUP)
193	}	478	{
194	}	479	aio_req sub;
195		480
196	static int	481	for (sub = req->grp_first; sub; sub = sub->grp_next)
197	poll_cb ()	482	req_cancel (sub);
		483	}
		484	}
		485
		486	static int poll_cb ()
198	{	487	{
199	dSP;	488	dSP;
200	int count = 0;	489	int count = 0;
201	int do_croak = 0;	490	int do_croak = 0;
202	aio_req req;	491	aio_req req;
203		492
204	for (;;)	493	for (;;)
205	{	494	{
206	pthread_mutex_lock (&reslock);	495	LOCK (reslock);
207	req = ress;	496	req = reqq_shift (&res_queue);
208		497
209	if (req)	498	if (req)
210	{	499	{
211	ress = req->next;
212
213	if (!ress)	500	if (!res_queue.size)
214	{	501	{
215	/* read any signals sent by the worker threads */	502	/* read any signals sent by the worker threads */
216	char buf [32];	503	char buf [32];
217	while (read (respipe [0], buf, 32) == 32)	504	while (read (respipe [0], buf, 32) == 32)
218	;	505	;
219
220	rese = 0;
221	}	506	}
222	}	507	}
223		508
224	pthread_mutex_unlock (&reslock);	509	UNLOCK (reslock);
225		510
226	if (!req)	511	if (!req)
227	break;	512	break;
228		513
229	nreqs--;	514	--nreqs;
230		515
231	if (req->type == REQ_QUIT)	516	if (req->type == REQ_QUIT)
232	started--;	517	started--;
		518	else if (req->type == REQ_GROUP && req->length)
		519	{
		520	req->fd = 1; /* mark request as delayed */
		521	continue;
		522	}
233	else	523	else
234	{	524	{
235	int errorno = errno;
236	errno = req->errorno;
237
238	if (req->type == REQ_READ)	525	if (req->type == REQ_READ)
239	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	526	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
240		527
241	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))	528	if (req->data2ptr && (req->type == REQ_READ \|\| req->type == REQ_WRITE))
242	SvREADONLY_off (req->data);	529	SvREADONLY_off (req->data);
…		…
246	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	533	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
247	PL_laststatval = req->result;	534	PL_laststatval = req->result;
248	PL_statcache = *(req->statdata);	535	PL_statcache = *(req->statdata);
249	}	536	}
250		537
251	ENTER;	538	req_invoke (req);
252	PUSHMARK (SP);
253		539
254	if (req->type == REQ_READDIR)
255	{
256	SV *rv = &PL_sv_undef;
257
258	if (req->result >= 0)
259	{
260	char *buf = req->data2ptr;
261	AV *av = newAV ();
262
263	while (req->result)
264	{
265	SV *sv = newSVpv (buf, 0);
266
267	av_push (av, sv);
268	buf += SvCUR (sv) + 1;
269	req->result--;
270	}
271
272	rv = sv_2mortal (newRV_noinc ((SV *)av));
273	}
274
275	XPUSHs (rv);
276	}
277	else
278	{
279	XPUSHs (sv_2mortal (newSViv (req->result)));
280
281	if (req->type == REQ_OPEN)
282	{
283	/* convert fd to fh */
284	SV *fh;
285
286	PUTBACK;
287	call_pv ("IO::AIO::_fd2fh", G_SCALAR \| G_EVAL);
288	SPAGAIN;
289
290	fh = SvREFCNT_inc (POPs);
291
292	PUSHMARK (SP);
293	XPUSHs (sv_2mortal (fh));
294	}
295	}
296
297	if (SvOK (req->callback) && !req->cancelled)
298	{
299	PUTBACK;
300	call_sv (req->callback, G_VOID \| G_EVAL);
301	SPAGAIN;
302
303	if (SvTRUE (ERRSV))
304	{
305	req_free (req);
306	croak (0);
307	}
308	}
309
310	LEAVE;
311
312	errno = errorno;
313	count++;	540	count++;
314	}	541	}
315		542
316	req_free (req);	543	req_free (req);
317	}	544	}
…		…
319	return count;	546	return count;
320	}	547	}
321		548
322	static void aio_proc(void arg);	549	static void aio_proc(void arg);
323		550
324	static void
325	start_thread (void)	551	static void start_thread (void)
326	{	552	{
		553	worker *wrk = calloc (1, sizeof (worker));
		554
		555	if (!wrk)
		556	croak ("unable to allocate worker thread data");
		557
327	sigset_t fullsigset, oldsigset;	558	sigset_t fullsigset, oldsigset;
328	pthread_t tid;
329	pthread_attr_t attr;	559	pthread_attr_t attr;
330		560
331	pthread_attr_init (&attr);	561	pthread_attr_init (&attr);
332	pthread_attr_setstacksize (&attr, STACKSIZE);	562	pthread_attr_setstacksize (&attr, STACKSIZE);
333	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	563	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
334		564
335	sigfillset (&fullsigset);	565	sigfillset (&fullsigset);
		566
		567	LOCK (wrklock);
336	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	568	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
337		569
338	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	570	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		571	{
		572	wrk->prev = &wrk_first;
		573	wrk->next = wrk_first.next;
		574	wrk_first.next->prev = wrk;
		575	wrk_first.next = wrk;
339	started++;	576	started++;
		577	}
		578	else
		579	free (wrk);
340		580
341	sigprocmask (SIG_SETMASK, &oldsigset, 0);	581	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		582	UNLOCK (wrklock);
342	}	583	}
343		584
344	static void
345	req_send (aio_req req)	585	static void req_send (aio_req req)
346	{	586	{
347	while (started < wanted && nreqs >= started)	587	while (started < wanted && nreqs >= started)
348	start_thread ();	588	start_thread ();
349		589
350	nreqs++;	590	++nreqs;
351		591
352	pthread_mutex_lock (&reqlock);	592	LOCK (reqlock);
353		593	reqq_push (&req_queue, req);
354	req->next = 0;
355
356	if (reqe)
357	{
358	reqe->next = req;
359	reqe = req;
360	}
361	else
362	reqe = reqs = req;
363
364	pthread_cond_signal (&reqwait);	594	pthread_cond_signal (&reqwait);
365	pthread_mutex_unlock (&reqlock);	595	UNLOCK (reqlock);
366		596
367	if (nreqs > max_outstanding)	597	if (nreqs > max_outstanding)
368	for (;;)	598	for (;;)
369	{	599	{
370	poll_cb ();	600	poll_cb ();
…		…
374		604
375	poll_wait ();	605	poll_wait ();
376	}	606	}
377	}	607	}
378		608
379	static void	609	static void end_thread (void)
380	end_thread (void)
381	{	610	{
382	aio_req req;	611	aio_req req;
		612
383	Newz (0, req, 1, aio_cb);	613	Newz (0, req, 1, aio_cb);
		614
384	req->type = REQ_QUIT;	615	req->type = REQ_QUIT;
		616	req->pri = PRI_MAX + PRI_BIAS;
385		617
386	req_send (req);	618	req_send (req);
387	}	619	}
388		620
389	static void min_parallel (int nthreads)	621	static void min_parallel (int nthreads)
…		…
436	* normal read/write by using a mutex. slows down execution a lot,	668	* normal read/write by using a mutex. slows down execution a lot,
437	* but that's your problem, not mine.	669	* but that's your problem, not mine.
438	*/	670	*/
439	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	671	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
440		672
441	static ssize_t	673	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
442	pread (int fd, void *buf, size_t count, off_t offset)
443	{	674	{
444	ssize_t res;	675	ssize_t res;
445	off_t ooffset;	676	off_t ooffset;
446		677
447	pthread_mutex_lock (&preadwritelock);	678	LOCK (preadwritelock);
448	ooffset = lseek (fd, 0, SEEK_CUR);	679	ooffset = lseek (fd, 0, SEEK_CUR);
449	lseek (fd, offset, SEEK_SET);	680	lseek (fd, offset, SEEK_SET);
450	res = read (fd, buf, count);	681	res = read (fd, buf, count);
451	lseek (fd, ooffset, SEEK_SET);	682	lseek (fd, ooffset, SEEK_SET);
452	pthread_mutex_unlock (&preadwritelock);	683	UNLOCK (preadwritelock);
453		684
454	return res;	685	return res;
455	}	686	}
456		687
457	static ssize_t
458	pwrite (int fd, void *buf, size_t count, off_t offset)	688	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
459	{	689	{
460	ssize_t res;	690	ssize_t res;
461	off_t ooffset;	691	off_t ooffset;
462		692
463	pthread_mutex_lock (&preadwritelock);	693	LOCK (preadwritelock);
464	ooffset = lseek (fd, 0, SEEK_CUR);	694	ooffset = lseek (fd, 0, SEEK_CUR);
465	lseek (fd, offset, SEEK_SET);	695	lseek (fd, offset, SEEK_SET);
466	res = write (fd, buf, count);	696	res = write (fd, buf, count);
467	lseek (fd, offset, SEEK_SET);	697	lseek (fd, offset, SEEK_SET);
468	pthread_mutex_unlock (&preadwritelock);	698	UNLOCK (preadwritelock);
469		699
470	return res;	700	return res;
471	}	701	}
472	#endif	702	#endif
473		703
…		…
476	#endif	706	#endif
477		707
478	#if !HAVE_READAHEAD	708	#if !HAVE_READAHEAD
479	# define readahead aio_readahead	709	# define readahead aio_readahead
480		710
481	static ssize_t
482	readahead (int fd, off_t offset, size_t count)	711	static ssize_t readahead (int fd, off_t offset, size_t count)
483	{	712	{
484	char readahead_buf[4096];	713	dBUF;
485		714
486	while (count > 0)	715	while (count > 0)
487	{	716	{
488	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	717	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
489		718
490	pread (fd, readahead_buf, len, offset);	719	pread (fd, aio_buf, len, offset);
491	offset += len;	720	offset += len;
492	count -= len;	721	count -= len;
493	}	722	}
494		723
495	errno = 0;	724	errno = 0;
…		…
499	#if !HAVE_READDIR_R	728	#if !HAVE_READDIR_R
500	# define readdir_r aio_readdir_r	729	# define readdir_r aio_readdir_r
501		730
502	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	731	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
503		732
504	static int
505	readdir_r (DIR dirp, struct dirent ent, struct dirent **res)	733	static int readdir_r (DIR dirp, struct dirent ent, struct dirent **res)
506	{	734	{
507	struct dirent *e;	735	struct dirent *e;
508	int errorno;	736	int errorno;
509		737
510	pthread_mutex_lock (&readdirlock);	738	LOCK (readdirlock);
511		739
512	e = readdir (dirp);	740	e = readdir (dirp);
513	errorno = errno;	741	errorno = errno;
514		742
515	if (e)	743	if (e)
…		…
518	strcpy (ent->d_name, e->d_name);	746	strcpy (ent->d_name, e->d_name);
519	}	747	}
520	else	748	else
521	*res = 0;	749	*res = 0;
522		750
523	pthread_mutex_unlock (&readdirlock);	751	UNLOCK (readdirlock);
524		752
525	errno = errorno;	753	errno = errorno;
526	return e ? 0 : -1;	754	return e ? 0 : -1;
527	}	755	}
528	#endif	756	#endif
529		757
530	/* sendfile always needs emulation */	758	/* sendfile always needs emulation */
531	static ssize_t
532	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	759	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
533	{	760	{
534	ssize_t res;	761	ssize_t res;
535		762
536	if (!count)	763	if (!count)
537	return 0;	764	return 0;
…		…
586	#endif	813	#endif
587	)	814	)
588	)	815	)
589	{	816	{
590	/* emulate sendfile. this is a major pain in the ass */	817	/* emulate sendfile. this is a major pain in the ass */
591	char buf[4096];	818	dBUF;
		819
592	res = 0;	820	res = 0;
593		821
594	while (count)	822	while (count)
595	{	823	{
596	ssize_t cnt;	824	ssize_t cnt;
597		825
598	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	826	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
599		827
600	if (cnt <= 0)	828	if (cnt <= 0)
601	{	829	{
602	if (cnt && !res) res = -1;	830	if (cnt && !res) res = -1;
603	break;	831	break;
604	}	832	}
605		833
606	cnt = write (ofd, buf, cnt);	834	cnt = write (ofd, aio_buf, cnt);
607		835
608	if (cnt <= 0)	836	if (cnt <= 0)
609	{	837	{
610	if (cnt && !res) res = -1;	838	if (cnt && !res) res = -1;
611	break;	839	break;
…		…
619		847
620	return res;	848	return res;
621	}	849	}
622		850
623	/* read a full directory */	851	/* read a full directory */
624	static int	852	static void scandir_ (aio_req req, worker *self)
625	scandir_ (const char path, void *namesp)
626	{	853	{
627	DIR *dirp = opendir (path);	854	DIR *dirp;
628	union	855	union
629	{	856	{
630	struct dirent d;	857	struct dirent d;
631	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	858	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
632	} u;	859	} *u;
633	struct dirent *entp;	860	struct dirent *entp;
634	char name, names;	861	char name, names;
635	int memlen = 4096;	862	int memlen = 4096;
636	int memofs = 0;	863	int memofs = 0;
637	int res = 0;	864	int res = 0;
638	int errorno;	865	int errorno;
639		866
640	if (!dirp)	867	LOCK (wrklock);
641	return -1;	868	self->dirp = dirp = opendir (req->dataptr);
		869	self->dbuf = u = malloc (sizeof (*u));
		870	UNLOCK (wrklock);
642		871
643	names = malloc (memlen);	872	req->data2ptr = names = malloc (memlen);
644		873
		874	if (dirp && u && names)
645	for (;;)	875	for (;;)
646	{	876	{
		877	errno = 0;
647	errno = 0, readdir_r (dirp, &u.d, &entp);	878	readdir_r (dirp, &u->d, &entp);
648		879
649	if (!entp)	880	if (!entp)
650	break;	881	break;
651		882
652	name = entp->d_name;	883	name = entp->d_name;
653		884
654	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))	885	if (name [0] != '.' \|\| (name [1] && (name [1] != '.' \|\| name [2])))
655	{	886	{
656	int len = strlen (name) + 1;	887	int len = strlen (name) + 1;
657		888
658	res++;	889	res++;
659		890
660	while (memofs + len > memlen)	891	while (memofs + len > memlen)
661	{	892	{
662	memlen *= 2;	893	memlen *= 2;
		894	LOCK (wrklock);
663	names = realloc (names, memlen);	895	req->data2ptr = names = realloc (names, memlen);
		896	UNLOCK (wrklock);
		897
664	if (!names)	898	if (!names)
665	break;	899	break;
666	}	900	}
667		901
668	memcpy (names + memofs, name, len);	902	memcpy (names + memofs, name, len);
669	memofs += len;	903	memofs += len;
670	}	904	}
671	}	905	}
672		906
673	errorno = errno;
674	closedir (dirp);
675
676	if (errorno)	907	if (errno)
677	{
678	free (names);
679	errno = errorno;
680	res = -1;	908	res = -1;
681	}	909
682		910	req->result = res;
683	namesp = (void )names;
684	return res;
685	}	911	}
686		912
687	/*****************************************************************************/	913	/*****************************************************************************/
688		914
689	static void *
690	aio_proc (void *thr_arg)	915	static void aio_proc (void thr_arg)
691	{	916	{
692	aio_req req;	917	aio_req req;
693	int type;	918	int type;
		919	worker self = (worker )thr_arg;
694		920
695	do	921	do
696	{	922	{
697	pthread_mutex_lock (&reqlock);	923	LOCK (reqlock);
698		924
699	for (;;)	925	for (;;)
700	{	926	{
701	req = reqs;	927	self->req = req = reqq_shift (&req_queue);
702
703	if (reqs)
704	{
705	reqs = reqs->next;
706	if (!reqs) reqe = 0;
707	}
708		928
709	if (req)	929	if (req)
710	break;	930	break;
711		931
712	pthread_cond_wait (&reqwait, &reqlock);	932	pthread_cond_wait (&reqwait, &reqlock);
713	}	933	}
714		934
715	pthread_mutex_unlock (&reqlock);	935	UNLOCK (reqlock);
716		936
717	errno = 0; /* strictly unnecessary */	937	errno = 0; /* strictly unnecessary */
		938	type = req->type; /* remember type for QUIT check */
718		939
719	if (!req->cancelled)	940	if (!(req->flags & FLAG_CANCELLED))
720	switch (req->type)	941	switch (type)
721	{	942	{
722	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	943	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
723	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	944	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
724		945
725	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	946	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
726	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	947	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
727		948
728	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	949	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
729	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	950	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
730	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	951	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
731		952
…		…
737	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	958	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
738	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	959	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
739		960
740	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	961	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
741	case REQ_FSYNC: req->result = fsync (req->fd); break;	962	case REQ_FSYNC: req->result = fsync (req->fd); break;
742	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	963	case REQ_READDIR: scandir_ (req, self); break;
743		964
		965	case REQ_BUSY:
		966	{
		967	struct timeval tv;
		968
		969	tv.tv_sec = req->fd;
		970	tv.tv_usec = req->fd2;
		971
		972	req->result = select (0, 0, 0, 0, &tv);
		973	}
		974
		975	case REQ_GROUP:
		976	case REQ_NOP:
744	case REQ_QUIT:	977	case REQ_QUIT:
745	break;	978	break;
746		979
747	default:	980	default:
748	req->result = ENOSYS;	981	req->result = ENOSYS;
749	break;	982	break;
750	}	983	}
751		984
752	req->errorno = errno;	985	req->errorno = errno;
753		986
754	pthread_mutex_lock (&reslock);	987	LOCK (reslock);
755		988
756	req->next = 0;	989	if (!reqq_push (&res_queue, req))
757
758	if (rese)
759	{
760	rese->next = req;
761	rese = req;
762	}
763	else
764	{
765	rese = ress = req;
766
767	/* write a dummy byte to the pipe so fh becomes ready */	990	/* write a dummy byte to the pipe so fh becomes ready */
768	write (respipe [1], &respipe, 1);	991	write (respipe [1], &respipe, 1);
769	}
770		992
771	pthread_mutex_unlock (&reslock);	993	self->req = 0;
		994	worker_clear (self);
		995
		996	UNLOCK (reslock);
772	}	997	}
773	while (type != REQ_QUIT);	998	while (type != REQ_QUIT);
774		999
		1000	LOCK (wrklock);
		1001	worker_free (self);
		1002	UNLOCK (wrklock);
		1003
775	return 0;	1004	return 0;
776	}	1005	}
777		1006
778	/*****************************************************************************/	1007	/*****************************************************************************/
779		1008
780	static void atfork_prepare (void)	1009	static void atfork_prepare (void)
781	{	1010	{
782	pthread_mutex_lock (&reqlock);	1011	LOCK (wrklock);
783	pthread_mutex_lock (&reslock);	1012	LOCK (reqlock);
		1013	LOCK (reslock);
784	#if !HAVE_PREADWRITE	1014	#if !HAVE_PREADWRITE
785	pthread_mutex_lock (&preadwritelock);	1015	LOCK (preadwritelock);
786	#endif	1016	#endif
787	#if !HAVE_READDIR_R	1017	#if !HAVE_READDIR_R
788	pthread_mutex_lock (&readdirlock);	1018	LOCK (readdirlock);
789	#endif	1019	#endif
790	}	1020	}
791		1021
792	static void atfork_parent (void)	1022	static void atfork_parent (void)
793	{	1023	{
794	#if !HAVE_READDIR_R	1024	#if !HAVE_READDIR_R
795	pthread_mutex_unlock (&readdirlock);	1025	UNLOCK (readdirlock);
796	#endif	1026	#endif
797	#if !HAVE_PREADWRITE	1027	#if !HAVE_PREADWRITE
798	pthread_mutex_unlock (&preadwritelock);	1028	UNLOCK (preadwritelock);
799	#endif	1029	#endif
800	pthread_mutex_unlock (&reslock);	1030	UNLOCK (reslock);
801	pthread_mutex_unlock (&reqlock);	1031	UNLOCK (reqlock);
		1032	UNLOCK (wrklock);
802	}	1033	}
803		1034
804	static void atfork_child (void)	1035	static void atfork_child (void)
805	{	1036	{
806	aio_req prv;	1037	aio_req prv;
807		1038
		1039	while (prv = reqq_shift (&req_queue))
		1040	req_free (prv);
		1041
		1042	while (prv = reqq_shift (&res_queue))
		1043	req_free (prv);
		1044
		1045	while (wrk_first.next != &wrk_first)
		1046	{
		1047	worker *wrk = wrk_first.next;
		1048
		1049	if (wrk->req)
		1050	req_free (wrk->req);
		1051
		1052	worker_clear (wrk);
		1053	worker_free (wrk);
		1054	}
		1055
808	started = 0;	1056	started = 0;
809		1057	nreqs = 0;
810	while (reqs)
811	{
812	prv = reqs;
813	reqs = prv->next;
814	req_free (prv);
815	}
816
817	reqs = reqe = 0;
818
819	while (ress)
820	{
821	prv = ress;
822	ress = prv->next;
823	req_free (prv);
824	}
825
826	ress = rese = 0;
827		1058
828	close (respipe [0]);	1059	close (respipe [0]);
829	close (respipe [1]);	1060	close (respipe [1]);
830	create_pipe ();	1061	create_pipe ();
831		1062
832	atfork_parent ();	1063	atfork_parent ();
833	}	1064	}
834		1065
835	#define dREQ \	1066	#define dREQ \
836	aio_req req; \	1067	aio_req req; \
		1068	int req_pri = next_pri; \
		1069	next_pri = DEFAULT_PRI + PRI_BIAS; \
837	\	1070	\
838	if (SvOK (callback) && !SvROK (callback)) \	1071	if (SvOK (callback) && !SvROK (callback)) \
839	croak ("callback must be undef or of reference type"); \	1072	croak ("callback must be undef or of reference type"); \
840	\	1073	\
841	Newz (0, req, 1, aio_cb); \	1074	Newz (0, req, 1, aio_cb); \
842	if (!req) \	1075	if (!req) \
843	croak ("out of memory during aio_req allocation"); \	1076	croak ("out of memory during aio_req allocation"); \
844	\	1077	\
845	req->callback = newSVsv (callback)	1078	req->callback = newSVsv (callback); \
		1079	req->pri = req_pri
846		1080
847	#define REQ_SEND \	1081	#define REQ_SEND \
848	req_send (req); \	1082	req_send (req); \
849	\	1083	\
850	if (GIMME_V != G_VOID) \	1084	if (GIMME_V != G_VOID) \
851	XPUSHs (req_sv (req));	1085	XPUSHs (req_sv (req, AIO_REQ_KLASS));
852		1086
853	MODULE = IO::AIO PACKAGE = IO::AIO	1087	MODULE = IO::AIO PACKAGE = IO::AIO
854		1088
855	PROTOTYPES: ENABLE	1089	PROTOTYPES: ENABLE
856		1090
…		…
1103	req->dataptr = SvPVbyte_nolen (req->data);	1337	req->dataptr = SvPVbyte_nolen (req->data);
1104		1338
1105	REQ_SEND;	1339	REQ_SEND;
1106	}	1340	}
1107		1341
1108	#if 0
1109
1110	# undocumented, because it does not cancel active requests
1111	void	1342	void
1112	cancel_most_requests ()	1343	aio_busy (delay,callback=&PL_sv_undef)
		1344	double delay
		1345	SV * callback
		1346	PPCODE:
		1347	{
		1348	dREQ;
		1349
		1350	req->type = REQ_BUSY;
		1351	req->fd = delay < 0. ? 0 : delay;
		1352	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1353
		1354	REQ_SEND;
		1355	}
		1356
		1357	void
		1358	aio_group (callback=&PL_sv_undef)
		1359	SV * callback
1113	PROTOTYPE:	1360	PROTOTYPE: ;$
1114	CODE:	1361	PPCODE:
1115	{	1362	{
1116	aio_req *req;	1363	dREQ;
1117		1364
1118	pthread_mutex_lock (&reqlock);	1365	req->type = REQ_GROUP;
1119	for (req = reqs; req; req = req->next)	1366	req_send (req);
1120	req->flags \|= 1;
1121	pthread_mutex_unlock (&reqlock);
1122		1367
1123	pthread_mutex_lock (&reslock);	1368	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1124	for (req = ress; req; req = req->next)
1125	req->flags \|= 1;
1126	pthread_mutex_unlock (&reslock);
1127	}	1369	}
1128		1370
1129	#endif	1371	void
		1372	aio_nop (callback=&PL_sv_undef)
		1373	SV * callback
		1374	PPCODE:
		1375	{
		1376	dREQ;
		1377
		1378	req->type = REQ_NOP;
		1379
		1380	REQ_SEND;
		1381	}
		1382
		1383	void
		1384	aioreq_pri (int pri = DEFAULT_PRI)
		1385	CODE:
		1386	if (pri < PRI_MIN) pri = PRI_MIN;
		1387	if (pri > PRI_MAX) pri = PRI_MAX;
		1388	next_pri = pri + PRI_BIAS;
		1389
		1390	void
		1391	aioreq_nice (int nice = 0)
		1392	CODE:
		1393	nice = next_pri - nice;
		1394	if (nice < PRI_MIN) nice = PRI_MIN;
		1395	if (nice > PRI_MAX) nice = PRI_MAX;
		1396	next_pri = nice + PRI_BIAS;
1130		1397
1131	void	1398	void
1132	flush ()	1399	flush ()
1133	PROTOTYPE:	1400	PROTOTYPE:
1134	CODE:	1401	CODE:
…		…
1177	CODE:	1444	CODE:
1178	RETVAL = nreqs;	1445	RETVAL = nreqs;
1179	OUTPUT:	1446	OUTPUT:
1180	RETVAL	1447	RETVAL
1181		1448
		1449	PROTOTYPES: DISABLE
		1450
1182	MODULE = IO::AIO PACKAGE = IO::AIO::CB	1451	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1183		1452
1184	void	1453	void
1185	cancel (aio_req_ornot req)	1454	cancel (aio_req_ornot req)
1186	PROTOTYPE:
1187	CODE:	1455	CODE:
1188	req->cancelled = 1;	1456	req_cancel (req);
1189		1457
		1458	void
		1459	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1460	CODE:
		1461	SvREFCNT_dec (req->callback);
		1462	req->callback = newSVsv (callback);
		1463
		1464	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1465
		1466	void
		1467	add (aio_req grp, ...)
		1468	PPCODE:
		1469	{
		1470	int i;
		1471	aio_req req;
		1472
		1473	if (grp->fd == 2)
		1474	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1475
		1476	for (i = 1; i < items; ++i )
		1477	{
		1478	if (GIMME_V != G_VOID)
		1479	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1480
		1481	req = SvAIO_REQ (ST (i));
		1482
		1483	if (req)
		1484	{
		1485	++grp->length;
		1486	req->grp = grp;
		1487
		1488	req->grp_prev = 0;
		1489	req->grp_next = grp->grp_first;
		1490
		1491	if (grp->grp_first)
		1492	grp->grp_first->grp_prev = req;
		1493
		1494	grp->grp_first = req;
		1495	}
		1496	}
		1497	}
		1498
		1499	void
		1500	result (aio_req grp, ...)
		1501	CODE:
		1502	{
		1503	int i;
		1504	AV *av = newAV ();
		1505
		1506	for (i = 1; i < items; ++i )
		1507	av_push (av, newSVsv (ST (i)));
		1508
		1509	SvREFCNT_dec (grp->data);
		1510	grp->data = (SV *)av;
		1511	}
		1512
		1513	void
		1514	limit (aio_req grp, int limit)
		1515	CODE:
		1516	grp->fd2 = limit;
		1517	aio_grp_feed (grp);
		1518
		1519	void
		1520	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1521	CODE:
		1522	{
		1523	SvREFCNT_dec (grp->fh2);
		1524	grp->fh2 = newSVsv (callback);
		1525
		1526	if (grp->fd2 <= 0)
		1527	grp->fd2 = 2;
		1528
		1529	aio_grp_feed (grp);
		1530	}
		1531

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Comparing IO-AIO/AIO.xs (file contents): Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs. Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC

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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs.
Revision 1.71 by root, Tue Oct 24 16:35:04 2006 UTC