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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.62 by root, Mon Oct 23 22:45:18 2006 UTC vs.
Revision 1.86 by root, Mon Oct 30 23:30:00 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
…		…
34	# else	43	# else
35	# error sendfile support requested but not available	44	# error sendfile support requested but not available
36	# endif	45	# endif
37	#endif	46	#endif
38		47
		48	/* number of seconds after which idle threads exit */
		49	#define IDLE_TIMEOUT 10
		50
39	/* used for struct dirent, AIX doesn't provide it */	51	/* used for struct dirent, AIX doesn't provide it */
40	#ifndef NAME_MAX	52	#ifndef NAME_MAX
41	# define NAME_MAX 4096	53	# define NAME_MAX 4096
42	#endif	54	#endif
43		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
		59	#endif
		60
44	#if __ia64	61	#if __ia64
45	# define STACKSIZE 65536	62	# define STACKSIZE 65536
		63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		64	# define STACKSIZE PTHREAD_STACK_MIN
46	#else	65	#else
47	# define STACKSIZE 8192	66	# define STACKSIZE 16384
48	#endif	67	#endif
		68
		69	/* wether word reads are potentially non-atomic.
		70	* this is conservatice, likely most arches this runs
		71	* on have atomic word read/writes.
		72	*/
		73	#ifndef WORDACCESS_UNSAFE
		74	# if __i386 || __x86_64
		75	# define WORDACCESS_UNSAFE 0
		76	# else
		77	# define WORDACCESS_UNSAFE 1
		78	# endif
		79	#endif
		80
		81	/* buffer size for various temporary buffers */
		82	#define AIO_BUFSIZE 65536
		83
		84	#define dBUF \
		85	char *aio_buf; \
		86	LOCK (wrklock); \
		87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		88	UNLOCK (wrklock); \
		89	if (!aio_buf) \
		90	return -1;
49		91
50	enum {	92	enum {
51	REQ_QUIT,	93	REQ_QUIT,
52	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,	96	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,	100	REQ_MKNOD, REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,	101	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
60	REQ_GROUP, REQ_NOP,	102	REQ_GROUP, REQ_NOP,
61	REQ_SLEEP,	103	REQ_BUSY,
62	};	104	};
63		105
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	106	#define AIO_REQ_KLASS "IO::AIO::REQ"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"	107	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		108
67	typedef struct aio_cb	109	typedef struct aio_cb
68	{	110	{
69	struct aio_cb *volatile next;	111	struct aio_cb *volatile next;
70		112
71	SV *data, *callback;	113	SV *callback, *fh;
72	SV *fh, *fh2;	114	SV *sv1, *sv2;
73	void *dataptr, *data2ptr;	115	void *ptr1, *ptr2;
74	Stat_t *statdata;	116	Stat_t *statdata;
75	off_t offset;	117	off_t offs;
76	size_t length;	118	size_t size;
77	ssize_t result;	119	ssize_t result;
78		120
79	STRLEN dataoffset;	121	STRLEN stroffset;
80	int type;	122	int type;
81	int fd, fd2;	123	int int1, int2;
82	int errorno;	124	int errorno;
83	mode_t mode; /* open */	125	mode_t mode; /* open */
84		126
85	unsigned char flags;	127	unsigned char flags;
86	unsigned char pri;	128	unsigned char pri;
…		…
88	SV *self; /* the perl counterpart of this request, if any */	130	SV *self; /* the perl counterpart of this request, if any */
89	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
90	} aio_cb;	132	} aio_cb;
91		133
92	enum {	134	enum {
93	FLAG_CANCELLED = 0x01,	135	FLAG_CANCELLED = 0x01,
		136	FLAG_DATA_RO_OFF = 0x80, /* data was set readonly */
94	};	137	};
95		138
96	typedef aio_cb *aio_req;	139	typedef aio_cb *aio_req;
97	typedef aio_cb *aio_req_ornot;	140	typedef aio_cb *aio_req_ornot;
98		141
…		…
100	PRI_MIN = -4,	143	PRI_MIN = -4,
101	PRI_MAX = 4,	144	PRI_MAX = 4,
102		145
103	DEFAULT_PRI = 0,	146	DEFAULT_PRI = 0,
104	PRI_BIAS = -PRI_MIN,	147	PRI_BIAS = -PRI_MIN,
		148	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
105	};	149	};
106		150
		151	#define AIO_TICKS ((1000000 + 1023) >> 10)
		152
		153	static unsigned int max_poll_time = 0;
		154	static unsigned int max_poll_reqs = 0;
		155
		156	/* calculcate time difference in ~1/AIO_TICKS of a second */
		157	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		158	{
		159	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		160	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		161	}
		162
107	static int next_pri = DEFAULT_PRI + PRI_BIAS;	163	static int next_pri = DEFAULT_PRI + PRI_BIAS;
108		164
109	static int started, wanted;	165	static unsigned int started, idle, wanted;
110	static volatile int nreqs;	166
111	static int max_outstanding = 1<<30;	167	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		168	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		169	#else
		170	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		171	#endif
		172
		173	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		174	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		175
		176	/* worker threads management */
		177	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		178
		179	typedef struct worker {
		180	/* locked by wrklock */
		181	struct worker *prev, *next;
		182
		183	pthread_t tid;
		184
		185	/* locked by reslock, reqlock or wrklock */
		186	aio_req req; /* currently processed request */
		187	void *dbuf;
		188	DIR *dirp;
		189	} worker;
		190
		191	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		192
		193	static void worker_clear (worker *wrk)
		194	{
		195	if (wrk->dirp)
		196	{
		197	closedir (wrk->dirp);
		198	wrk->dirp = 0;
		199	}
		200
		201	if (wrk->dbuf)
		202	{
		203	free (wrk->dbuf);
		204	wrk->dbuf = 0;
		205	}
		206	}
		207
		208	static void worker_free (worker *wrk)
		209	{
		210	wrk->next->prev = wrk->prev;
		211	wrk->prev->next = wrk->next;
		212
		213	free (wrk);
		214	}
		215
		216	static volatile unsigned int nreqs, nready, npending;
		217	static volatile unsigned int max_idle = 4;
		218	static volatile unsigned int max_outstanding = 0xffffffff;
112	static int respipe [2];	219	static int respipe [2];
113		220
114	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	221	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
115	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	222	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
116	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	223	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
117		224
118	static volatile aio_req reqs, reqe; /* queue start, queue end */	225	#if WORDACCESS_UNSAFE
119	static volatile aio_req ress, rese; /* queue start, queue end */
120		226
		227	static unsigned int get_nready ()
		228	{
		229	unsigned int retval;
		230
		231	LOCK (reqlock);
		232	retval = nready;
		233	UNLOCK (reqlock);
		234
		235	return retval;
		236	}
		237
		238	static unsigned int get_npending ()
		239	{
		240	unsigned int retval;
		241
		242	LOCK (reslock);
		243	retval = npending;
		244	UNLOCK (reslock);
		245
		246	return retval;
		247	}
		248
		249	static unsigned int get_nthreads ()
		250	{
		251	unsigned int retval;
		252
		253	LOCK (wrklock);
		254	retval = started;
		255	UNLOCK (wrklock);
		256
		257	return retval;
		258	}
		259
		260	#else
		261
		262	# define get_nready() nready
		263	# define get_npending() npending
		264	# define get_nthreads() started
		265
		266	#endif
		267
		268	/*
		269	* a somewhat faster data structure might be nice, but
		270	* with 8 priorities this actually needs <20 insns
		271	* per shift, the most expensive operation.
		272	*/
		273	typedef struct {
		274	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		275	int size;
		276	} reqq;
		277
		278	static reqq req_queue;
		279	static reqq res_queue;
		280
		281	int reqq_push (reqq *q, aio_req req)
		282	{
		283	int pri = req->pri;
		284	req->next = 0;
		285
		286	if (q->qe[pri])
		287	{
		288	q->qe[pri]->next = req;
		289	q->qe[pri] = req;
		290	}
		291	else
		292	q->qe[pri] = q->qs[pri] = req;
		293
		294	return q->size++;
		295	}
		296
		297	aio_req reqq_shift (reqq *q)
		298	{
		299	int pri;
		300
		301	if (!q->size)
		302	return 0;
		303
		304	--q->size;
		305
		306	for (pri = NUM_PRI; pri--; )
		307	{
		308	aio_req req = q->qs[pri];
		309
		310	if (req)
		311	{
		312	if (!(q->qs[pri] = req->next))
		313	q->qe[pri] = 0;
		314
		315	return req;
		316	}
		317	}
		318
		319	abort ();
		320	}
		321
		322	static int poll_cb ();
121	static void req_invoke (aio_req req);	323	static void req_invoke (aio_req req);
122	static void req_free (aio_req req);	324	static void req_free (aio_req req);
		325	static void req_cancel (aio_req req);
123		326
124	/* must be called at most once */	327	/* must be called at most once */
125	static SV *req_sv (aio_req req, const char *klass)	328	static SV *req_sv (aio_req req, const char *klass)
126	{	329	{
127	if (!req->self)	330	if (!req->self)
…		…
145	return mg ? (aio_req)mg->mg_ptr : 0;	348	return mg ? (aio_req)mg->mg_ptr : 0;
146	}	349	}
147		350
148	static void aio_grp_feed (aio_req grp)	351	static void aio_grp_feed (aio_req grp)
149	{	352	{
150	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	353	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
151	{	354	{
152	int old_len = grp->length;	355	int old_len = grp->size;
153		356
154	if (grp->fh2 && SvOK (grp->fh2))	357	if (grp->sv2 && SvOK (grp->sv2))
155	{	358	{
156	dSP;	359	dSP;
157		360
158	ENTER;	361	ENTER;
159	SAVETMPS;	362	SAVETMPS;
160	PUSHMARK (SP);	363	PUSHMARK (SP);
161	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	364	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
162	PUTBACK;	365	PUTBACK;
163	call_sv (grp->fh2, G_VOID | G_EVAL);	366	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
164	SPAGAIN;	367	SPAGAIN;
165	FREETMPS;	368	FREETMPS;
166	LEAVE;	369	LEAVE;
167	}	370	}
168		371
169	/* stop if no progress has been made */	372	/* stop if no progress has been made */
170	if (old_len == grp->length)	373	if (old_len == grp->size)
171	{	374	{
172	SvREFCNT_dec (grp->fh2);	375	SvREFCNT_dec (grp->sv2);
173	grp->fh2 = 0;	376	grp->sv2 = 0;
174	break;	377	break;
175	}	378	}
176	}	379	}
177	}	380	}
178		381
179	static void aio_grp_dec (aio_req grp)	382	static void aio_grp_dec (aio_req grp)
180	{	383	{
181	--grp->length;	384	--grp->size;
182		385
183	/* call feeder, if applicable */	386	/* call feeder, if applicable */
184	aio_grp_feed (grp);	387	aio_grp_feed (grp);
185		388
186	/* finish, if done */	389	/* finish, if done */
187	if (!grp->length && grp->fd)	390	if (!grp->size && grp->int1)
188	{	391	{
189	req_invoke (grp);	392	req_invoke (grp);
190	req_free (grp);	393	req_free (grp);
191	}	394	}
192	}	395	}
193		396
194	static void poll_wait ()
195	{
196	fd_set rfd;
197
198	while (nreqs)
199	{
200	aio_req req;
201	pthread_mutex_lock (&reslock);
202	req = ress;
203	pthread_mutex_unlock (&reslock);
204
205	if (req)
206	return;
207
208	FD_ZERO(&rfd);
209	FD_SET(respipe [0], &rfd);
210
211	select (respipe [0] + 1, &rfd, 0, 0, 0);
212	}
213	}
214
215	static void req_invoke (aio_req req)	397	static void req_invoke (aio_req req)
216	{	398	{
217	dSP;	399	dSP;
218	int errorno = errno;
219		400
		401	if (req->flags & FLAG_DATA_RO_OFF)
		402	SvREADONLY_off (req->sv1);
		403
		404	if (req->statdata)
		405	{
		406	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		407	PL_laststatval = req->result;
		408	PL_statcache = *(req->statdata);
		409	}
		410
220	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))	411	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
221	return;	412	{
222
223	errno = req->errorno;
224
225	ENTER;	413	ENTER;
226	SAVETMPS;	414	SAVETMPS;
227	PUSHMARK (SP);	415	PUSHMARK (SP);
228	EXTEND (SP, 1);	416	EXTEND (SP, 1);
229		417
230	switch (req->type)	418	switch (req->type)
231	{
232	case REQ_READDIR:
233	{	419	{
234	SV *rv = &PL_sv_undef;	420	case REQ_READDIR:
235
236	if (req->result >= 0)
237	{	421	{
238	char *buf = req->data2ptr;	422	SV *rv = &PL_sv_undef;
239	AV *av = newAV ();
240		423
241	while (req->result)	424	if (req->result >= 0)
242	{	425	{
		426	int i;
		427	char *buf = req->ptr2;
		428	AV *av = newAV ();
		429
		430	av_extend (av, req->result - 1);
		431
		432	for (i = 0; i < req->result; ++i)
		433	{
243	SV *sv = newSVpv (buf, 0);	434	SV *sv = newSVpv (buf, 0);
244		435
245	av_push (av, sv);	436	av_store (av, i, sv);
246	buf += SvCUR (sv) + 1;	437	buf += SvCUR (sv) + 1;
247	req->result--;	438	}
		439
		440	rv = sv_2mortal (newRV_noinc ((SV *)av));
248	}	441	}
249		442
250	rv = sv_2mortal (newRV_noinc ((SV *)av));	443	PUSHs (rv);
251	}	444	}
		445	break;
252		446
		447	case REQ_OPEN:
		448	{
		449	/* convert fd to fh */
		450	SV *fh;
		451
		452	PUSHs (sv_2mortal (newSViv (req->result)));
		453	PUTBACK;
		454	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		455	SPAGAIN;
		456
		457	fh = SvREFCNT_inc (POPs);
		458
		459	PUSHMARK (SP);
		460	XPUSHs (sv_2mortal (fh));
		461	}
		462	break;
		463
		464	case REQ_GROUP:
		465	req->int1 = 2; /* mark group as finished */
		466
		467	if (req->sv1)
		468	{
		469	int i;
		470	AV *av = (AV *)req->sv1;
		471
		472	EXTEND (SP, AvFILL (av) + 1);
		473	for (i = 0; i <= AvFILL (av); ++i)
		474	PUSHs (*av_fetch (av, i, 0));
		475	}
		476	break;
		477
		478	case REQ_NOP:
		479	case REQ_BUSY:
		480	break;
		481
		482	case REQ_READLINK:
		483	if (req->result > 0)
		484	{
		485	SvCUR_set (req->sv1, req->result);
		486	*SvEND (req->sv1) = 0;
253	PUSHs (rv);	487	PUSHs (req->sv1);
		488	}
		489	break;
		490
		491	case REQ_READ:
		492	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		493	*SvEND (req->sv1) = 0;
		494	/* fall through */
		495	default:
		496	PUSHs (sv_2mortal (newSViv (req->result)));
		497	break;
254	}	498	}
255	break;
256		499
257	case REQ_OPEN:	500	errno = req->errorno;
258	{
259	/* convert fd to fh */
260	SV *fh;
261		501
262	PUSHs (sv_2mortal (newSViv (req->result)));
263	PUTBACK;	502	PUTBACK;
264	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
265	SPAGAIN;
266
267	fh = SvREFCNT_inc (POPs);
268
269	PUSHMARK (SP);
270	XPUSHs (sv_2mortal (fh));
271	}
272	break;
273
274	case REQ_GROUP:
275	req->fd = 2; /* mark group as finished */
276
277	if (req->data)
278	{
279	int i;
280	AV *av = (AV *)req->data;
281
282	EXTEND (SP, AvFILL (av) + 1);
283	for (i = 0; i <= AvFILL (av); ++i)
284	PUSHs (*av_fetch (av, i, 0));
285	}
286	break;
287
288	case REQ_NOP:
289	case REQ_SLEEP:
290	break;
291
292	default:
293	PUSHs (sv_2mortal (newSViv (req->result)));
294	break;
295	}
296
297
298	PUTBACK;
299	call_sv (req->callback, G_VOID | G_EVAL);	503	call_sv (req->callback, G_VOID | G_EVAL);
300	SPAGAIN;	504	SPAGAIN;
301		505
302	FREETMPS;	506	FREETMPS;
303	LEAVE;	507	LEAVE;
304
305	errno = errorno;
306
307	if (SvTRUE (ERRSV))
308	{	508	}
309	req_free (req);
310	croak (0);
311	}
312	}
313		509
314	static void req_free (aio_req req)
315	{
316	if (req->grp)	510	if (req->grp)
317	{	511	{
318	aio_req grp = req->grp;	512	aio_req grp = req->grp;
319		513
320	/* unlink request */	514	/* unlink request */
…		…
325	grp->grp_first = req->grp_next;	519	grp->grp_first = req->grp_next;
326		520
327	aio_grp_dec (grp);	521	aio_grp_dec (grp);
328	}	522	}
329		523
		524	if (SvTRUE (ERRSV))
		525	{
		526	req_free (req);
		527	croak (0);
		528	}
		529	}
		530
		531	static void req_free (aio_req req)
		532	{
330	if (req->self)	533	if (req->self)
331	{	534	{
332	sv_unmagic (req->self, PERL_MAGIC_ext);	535	sv_unmagic (req->self, PERL_MAGIC_ext);
333	SvREFCNT_dec (req->self);	536	SvREFCNT_dec (req->self);
334	}	537	}
335		538
336	SvREFCNT_dec (req->data);
337	SvREFCNT_dec (req->fh);	539	SvREFCNT_dec (req->fh);
		540	SvREFCNT_dec (req->sv1);
338	SvREFCNT_dec (req->fh2);	541	SvREFCNT_dec (req->sv2);
339	SvREFCNT_dec (req->callback);	542	SvREFCNT_dec (req->callback);
340	Safefree (req->statdata);	543	Safefree (req->statdata);
341		544
342	if (req->type == REQ_READDIR && req->result >= 0)	545	if (req->type == REQ_READDIR)
343	free (req->data2ptr);	546	free (req->ptr2);
344		547
345	Safefree (req);	548	Safefree (req);
346	}	549	}
347		550
		551	static void req_cancel_subs (aio_req grp)
		552	{
		553	aio_req sub;
		554
		555	if (grp->type != REQ_GROUP)
		556	return;
		557
		558	SvREFCNT_dec (grp->sv2);
		559	grp->sv2 = 0;
		560
		561	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		562	req_cancel (sub);
		563	}
		564
348	static void req_cancel (aio_req req)	565	static void req_cancel (aio_req req)
349	{	566	{
350	req->flags |= FLAG_CANCELLED;	567	req->flags |= FLAG_CANCELLED;
351		568
352	if (req->type == REQ_GROUP)	569	req_cancel_subs (req);
353	{
354	aio_req sub;
355
356	for (sub = req->grp_first; sub; sub = sub->grp_next)
357	req_cancel (sub);
358	}
359	}
360
361	static int poll_cb ()
362	{
363	dSP;
364	int count = 0;
365	int do_croak = 0;
366	aio_req req;
367
368	for (;;)
369	{
370	pthread_mutex_lock (&reslock);
371	req = ress;
372
373	if (req)
374	{
375	ress = req->next;
376
377	if (!ress)
378	{
379	/* read any signals sent by the worker threads */
380	char buf [32];
381	while (read (respipe [0], buf, 32) == 32)
382	;
383
384	rese = 0;
385	}
386	}
387
388	pthread_mutex_unlock (&reslock);
389
390	if (!req)
391	break;
392
393	--nreqs;
394
395	if (req->type == REQ_QUIT)
396	started--;
397	else if (req->type == REQ_GROUP && req->length)
398	{
399	req->fd = 1; /* mark request as delayed */
400	continue;
401	}
402	else
403	{
404	if (req->type == REQ_READ)
405	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
406
407	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
408	SvREADONLY_off (req->data);
409
410	if (req->statdata)
411	{
412	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
413	PL_laststatval = req->result;
414	PL_statcache = *(req->statdata);
415	}
416
417	req_invoke (req);
418
419	count++;
420	}
421
422	req_free (req);
423	}
424
425	return count;
426	}	570	}
427		571
428	static void *aio_proc(void *arg);	572	static void *aio_proc(void *arg);
429		573
430	static void start_thread (void)	574	static void start_thread (void)
431	{	575	{
432	sigset_t fullsigset, oldsigset;	576	sigset_t fullsigset, oldsigset;
433	pthread_t tid;
434	pthread_attr_t attr;	577	pthread_attr_t attr;
		578
		579	worker *wrk = calloc (1, sizeof (worker));
		580
		581	if (!wrk)
		582	croak ("unable to allocate worker thread data");
435		583
436	pthread_attr_init (&attr);	584	pthread_attr_init (&attr);
437	pthread_attr_setstacksize (&attr, STACKSIZE);	585	pthread_attr_setstacksize (&attr, STACKSIZE);
438	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	586	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		587	#ifdef PTHREAD_SCOPE_PROCESS
		588	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		589	#endif
439		590
440	sigfillset (&fullsigset);	591	sigfillset (&fullsigset);
		592
		593	LOCK (wrklock);
441	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	594	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
442		595
443	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	596	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		597	{
		598	wrk->prev = &wrk_first;
		599	wrk->next = wrk_first.next;
		600	wrk_first.next->prev = wrk;
		601	wrk_first.next = wrk;
444	started++;	602	++started;
		603	}
		604	else
		605	free (wrk);
445		606
446	sigprocmask (SIG_SETMASK, &oldsigset, 0);	607	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		608	UNLOCK (wrklock);
		609	}
		610
		611	static void maybe_start_thread ()
		612	{
		613	if (get_nthreads () >= wanted)
		614	return;
		615
		616	/* todo: maybe use idle here, but might be less exact */
		617	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		618	return;
		619
		620	start_thread ();
447	}	621	}
448		622
449	static void req_send (aio_req req)	623	static void req_send (aio_req req)
450	{	624	{
451	while (started < wanted && nreqs >= started)
452	start_thread ();
453
454	++nreqs;	625	++nreqs;
455		626
456	pthread_mutex_lock (&reqlock);	627	LOCK (reqlock);
457		628	++nready;
458	req->next = 0;	629	reqq_push (&req_queue, req);
459
460	if (reqe)
461	{
462	reqe->next = req;
463	reqe = req;
464	}
465	else
466	reqe = reqs = req;
467
468	pthread_cond_signal (&reqwait);	630	pthread_cond_signal (&reqwait);
469	pthread_mutex_unlock (&reqlock);	631	UNLOCK (reqlock);
470		632
471	if (nreqs > max_outstanding)	633	maybe_start_thread ();
472	for (;;)
473	{
474	poll_cb ();
475
476	if (nreqs <= max_outstanding)
477	break;
478
479	poll_wait ();
480	}
481	}	634	}
482		635
483	static void end_thread (void)	636	static void end_thread (void)
484	{	637	{
485	aio_req req;	638	aio_req req;
		639
486	Newz (0, req, 1, aio_cb);	640	Newz (0, req, 1, aio_cb);
		641
487	req->type = REQ_QUIT;	642	req->type = REQ_QUIT;
		643	req->pri = PRI_MAX + PRI_BIAS;
488		644
489	req_send (req);	645	LOCK (reqlock);
		646	reqq_push (&req_queue, req);
		647	pthread_cond_signal (&reqwait);
		648	UNLOCK (reqlock);
		649
		650	LOCK (wrklock);
		651	--started;
		652	UNLOCK (wrklock);
		653	}
		654
		655	static void set_max_idle (int nthreads)
		656	{
		657	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		658	max_idle = nthreads <= 0 ? 1 : nthreads;
		659	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
490	}	660	}
491		661
492	static void min_parallel (int nthreads)	662	static void min_parallel (int nthreads)
493	{	663	{
494	if (wanted < nthreads)	664	if (wanted < nthreads)
495	wanted = nthreads;	665	wanted = nthreads;
496	}	666	}
497		667
498	static void max_parallel (int nthreads)	668	static void max_parallel (int nthreads)
499	{	669	{
500	int cur = started;
501
502	if (wanted > nthreads)	670	if (wanted > nthreads)
503	wanted = nthreads;	671	wanted = nthreads;
504		672
505	while (cur > wanted)
506	{
507	end_thread ();
508	cur--;
509	}
510
511	while (started > wanted)	673	while (started > wanted)
		674	end_thread ();
		675	}
		676
		677	static void poll_wait ()
		678	{
		679	fd_set rfd;
		680
		681	while (nreqs)
		682	{
		683	int size;
		684	if (WORDACCESS_UNSAFE) LOCK (reslock);
		685	size = res_queue.size;
		686	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		687
		688	if (size)
		689	return;
		690
		691	maybe_start_thread ();
		692
		693	FD_ZERO(&rfd);
		694	FD_SET(respipe [0], &rfd);
		695
		696	select (respipe [0] + 1, &rfd, 0, 0, 0);
512	{	697	}
		698	}
		699
		700	static int poll_cb ()
		701	{
		702	dSP;
		703	int count = 0;
		704	int maxreqs = max_poll_reqs;
		705	int do_croak = 0;
		706	struct timeval tv_start, tv_now;
		707	aio_req req;
		708
		709	if (max_poll_time)
		710	gettimeofday (&tv_start, 0);
		711
		712	for (;;)
		713	{
		714	for (;;)
		715	{
		716	maybe_start_thread ();
		717
		718	LOCK (reslock);
		719	req = reqq_shift (&res_queue);
		720
		721	if (req)
		722	{
		723	--npending;
		724
		725	if (!res_queue.size)
		726	{
		727	/* read any signals sent by the worker threads */
		728	char buf [32];
		729	while (read (respipe [0], buf, 32) == 32)
		730	;
		731	}
		732	}
		733
		734	UNLOCK (reslock);
		735
		736	if (!req)
		737	break;
		738
		739	--nreqs;
		740
		741	if (req->type == REQ_GROUP && req->size)
		742	{
		743	req->int1 = 1; /* mark request as delayed */
		744	continue;
		745	}
		746	else
		747	{
		748	req_invoke (req);
		749
		750	count++;
		751	}
		752
		753	req_free (req);
		754
		755	if (maxreqs && !--maxreqs)
		756	break;
		757
		758	if (max_poll_time)
		759	{
		760	gettimeofday (&tv_now, 0);
		761
		762	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		763	break;
		764	}
		765	}
		766
		767	if (nreqs <= max_outstanding)
		768	break;
		769
513	poll_wait ();	770	poll_wait ();
514	poll_cb ();	771
		772	++maxreqs;
515	}	773	}
		774
		775	return count;
516	}	776	}
517		777
518	static void create_pipe ()	778	static void create_pipe ()
519	{	779	{
520	if (pipe (respipe))	780	if (pipe (respipe))
…		…
544	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	804	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
545	{	805	{
546	ssize_t res;	806	ssize_t res;
547	off_t ooffset;	807	off_t ooffset;
548		808
549	pthread_mutex_lock (&preadwritelock);	809	LOCK (preadwritelock);
550	ooffset = lseek (fd, 0, SEEK_CUR);	810	ooffset = lseek (fd, 0, SEEK_CUR);
551	lseek (fd, offset, SEEK_SET);	811	lseek (fd, offset, SEEK_SET);
552	res = read (fd, buf, count);	812	res = read (fd, buf, count);
553	lseek (fd, ooffset, SEEK_SET);	813	lseek (fd, ooffset, SEEK_SET);
554	pthread_mutex_unlock (&preadwritelock);	814	UNLOCK (preadwritelock);
555		815
556	return res;	816	return res;
557	}	817	}
558		818
559	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)	819	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
560	{	820	{
561	ssize_t res;	821	ssize_t res;
562	off_t ooffset;	822	off_t ooffset;
563		823
564	pthread_mutex_lock (&preadwritelock);	824	LOCK (preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);	825	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);	826	lseek (fd, offset, SEEK_SET);
567	res = write (fd, buf, count);	827	res = write (fd, buf, count);
568	lseek (fd, offset, SEEK_SET);	828	lseek (fd, offset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);	829	UNLOCK (preadwritelock);
570		830
571	return res;	831	return res;
572	}	832	}
573	#endif	833	#endif
574		834
575	#if !HAVE_FDATASYNC	835	#if !HAVE_FDATASYNC
576	# define fdatasync fsync	836	# define fdatasync fsync
577	#endif	837	#endif
578		838
579	#if !HAVE_READAHEAD	839	#if !HAVE_READAHEAD
580	# define readahead aio_readahead	840	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
581		841
582	static ssize_t readahead (int fd, off_t offset, size_t count)	842	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
583	{	843	{
584	char readahead_buf[4096];	844	dBUF;
585		845
586	while (count > 0)	846	while (count > 0)
587	{	847	{
588	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	848	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
589		849
590	pread (fd, readahead_buf, len, offset);	850	pread (fd, aio_buf, len, offset);
591	offset += len;	851	offset += len;
592	count -= len;	852	count -= len;
593	}	853	}
594		854
595	errno = 0;	855	errno = 0;
596	}	856	}
		857
597	#endif	858	#endif
598		859
599	#if !HAVE_READDIR_R	860	#if !HAVE_READDIR_R
600	# define readdir_r aio_readdir_r	861	# define readdir_r aio_readdir_r
601		862
…		…
604	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	865	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
605	{	866	{
606	struct dirent *e;	867	struct dirent *e;
607	int errorno;	868	int errorno;
608		869
609	pthread_mutex_lock (&readdirlock);	870	LOCK (readdirlock);
610		871
611	e = readdir (dirp);	872	e = readdir (dirp);
612	errorno = errno;	873	errorno = errno;
613		874
614	if (e)	875	if (e)
…		…
617	strcpy (ent->d_name, e->d_name);	878	strcpy (ent->d_name, e->d_name);
618	}	879	}
619	else	880	else
620	*res = 0;	881	*res = 0;
621		882
622	pthread_mutex_unlock (&readdirlock);	883	UNLOCK (readdirlock);
623		884
624	errno = errorno;	885	errno = errorno;
625	return e ? 0 : -1;	886	return e ? 0 : -1;
626	}	887	}
627	#endif	888	#endif
628		889
629	/* sendfile always needs emulation */	890	/* sendfile always needs emulation */
630	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)	891	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
631	{	892	{
632	ssize_t res;	893	ssize_t res;
633		894
634	if (!count)	895	if (!count)
635	return 0;	896	return 0;
…		…
646	{	907	{
647	off_t sbytes;	908	off_t sbytes;
648	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	909	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
649		910
650	if (res < 0 && sbytes)	911	if (res < 0 && sbytes)
651	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	912	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
652	res = sbytes;	913	res = sbytes;
653	}	914	}
654		915
655	# elif __hpux	916	# elif __hpux
656	res = sendfile (ofd, ifd, offset, count, 0, 0);	917	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
684	#endif	945	#endif
685	)	946	)
686	)	947	)
687	{	948	{
688	/* emulate sendfile. this is a major pain in the ass */	949	/* emulate sendfile. this is a major pain in the ass */
689	char buf[4096];	950	dBUF;
		951
690	res = 0;	952	res = 0;
691		953
692	while (count)	954	while (count)
693	{	955	{
694	ssize_t cnt;	956	ssize_t cnt;
695		957
696	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	958	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
697		959
698	if (cnt <= 0)	960	if (cnt <= 0)
699	{	961	{
700	if (cnt && !res) res = -1;	962	if (cnt && !res) res = -1;
701	break;	963	break;
702	}	964	}
703		965
704	cnt = write (ofd, buf, cnt);	966	cnt = write (ofd, aio_buf, cnt);
705		967
706	if (cnt <= 0)	968	if (cnt <= 0)
707	{	969	{
708	if (cnt && !res) res = -1;	970	if (cnt && !res) res = -1;
709	break;	971	break;
…		…
717		979
718	return res;	980	return res;
719	}	981	}
720		982
721	/* read a full directory */	983	/* read a full directory */
722	static int scandir_ (const char *path, void **namesp)	984	static void scandir_ (aio_req req, worker *self)
723	{	985	{
724	DIR *dirp = opendir (path);	986	DIR *dirp;
725	union	987	union
726	{	988	{
727	struct dirent d;	989	struct dirent d;
728	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	990	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
729	} u;	991	} *u;
730	struct dirent *entp;	992	struct dirent *entp;
731	char *name, *names;	993	char *name, *names;
732	int memlen = 4096;	994	int memlen = 4096;
733	int memofs = 0;	995	int memofs = 0;
734	int res = 0;	996	int res = 0;
735	int errorno;	997	int errorno;
736		998
737	if (!dirp)	999	LOCK (wrklock);
738	return -1;	1000	self->dirp = dirp = opendir (req->ptr1);
739		1001	self->dbuf = u = malloc (sizeof (*u));
740	names = malloc (memlen);	1002	req->ptr2 = names = malloc (memlen);
		1003	UNLOCK (wrklock);
		1004
		1005	if (dirp && u && names)
		1006	for (;;)
		1007	{
		1008	errno = 0;
		1009	readdir_r (dirp, &u->d, &entp);
		1010
		1011	if (!entp)
		1012	break;
		1013
		1014	name = entp->d_name;
		1015
		1016	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1017	{
		1018	int len = strlen (name) + 1;
		1019
		1020	res++;
		1021
		1022	while (memofs + len > memlen)
		1023	{
		1024	memlen *= 2;
		1025	LOCK (wrklock);
		1026	req->ptr2 = names = realloc (names, memlen);
		1027	UNLOCK (wrklock);
		1028
		1029	if (!names)
		1030	break;
		1031	}
		1032
		1033	memcpy (names + memofs, name, len);
		1034	memofs += len;
		1035	}
		1036	}
		1037
		1038	if (errno)
		1039	res = -1;
		1040
		1041	req->result = res;
		1042	}
		1043
		1044	/*****************************************************************************/
		1045
		1046	static void *aio_proc (void *thr_arg)
		1047	{
		1048	aio_req req;
		1049	struct timespec ts;
		1050	worker *self = (worker *)thr_arg;
		1051
		1052	/* try to distribute timeouts somewhat evenly */
		1053	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1054	* (1000000000UL / 1024UL);
741		1055
742	for (;;)	1056	for (;;)
743	{	1057	{
744	errno = 0, readdir_r (dirp, &u.d, &entp);	1058	ts.tv_sec = time (0) + IDLE_TIMEOUT;
745		1059
746	if (!entp)	1060	LOCK (reqlock);
747	break;
748
749	name = entp->d_name;
750
751	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
752	{
753	int len = strlen (name) + 1;
754
755	res++;
756
757	while (memofs + len > memlen)
758	{
759	memlen *= 2;
760	names = realloc (names, memlen);
761	if (!names)
762	break;
763	}
764
765	memcpy (names + memofs, name, len);
766	memofs += len;
767	}
768	}
769
770	errorno = errno;
771	closedir (dirp);
772
773	if (errorno)
774	{
775	free (names);
776	errno = errorno;
777	res = -1;
778	}
779
780	*namesp = (void *)names;
781	return res;
782	}
783
784	/*****************************************************************************/
785
786	static void *aio_proc (void *thr_arg)
787	{
788	aio_req req;
789	int type;
790
791	do
792	{
793	pthread_mutex_lock (&reqlock);
794		1061
795	for (;;)	1062	for (;;)
796	{	1063	{
797	req = reqs;	1064	self->req = req = reqq_shift (&req_queue);
798
799	if (reqs)
800	{
801	reqs = reqs->next;
802	if (!reqs) reqe = 0;
803	}
804		1065
805	if (req)	1066	if (req)
806	break;	1067	break;
807		1068
		1069	++idle;
		1070
		1071	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1072	== ETIMEDOUT)
		1073	{
		1074	if (idle > max_idle)
		1075	{
		1076	--idle;
		1077	UNLOCK (reqlock);
		1078	LOCK (wrklock);
		1079	--started;
		1080	UNLOCK (wrklock);
		1081	goto quit;
		1082	}
		1083
		1084	/* we are allowed to idle, so do so without any timeout */
808	pthread_cond_wait (&reqwait, &reqlock);	1085	pthread_cond_wait (&reqwait, &reqlock);
		1086	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1087	}
		1088
		1089	--idle;
809	}	1090	}
810		1091
811	pthread_mutex_unlock (&reqlock);	1092	--nready;
		1093
		1094	UNLOCK (reqlock);
812		1095
813	errno = 0; /* strictly unnecessary */	1096	errno = 0; /* strictly unnecessary */
814	type = req->type; /* remember type for QUIT check */
815		1097
816	if (!(req->flags & FLAG_CANCELLED))	1098	if (!(req->flags & FLAG_CANCELLED))
817	switch (type)	1099	switch (req->type)
818	{	1100	{
819	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1101	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
820	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1102	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
821		1103
822	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1104	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
823	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1105	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
824		1106
825	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1107	case REQ_STAT: req->result = stat (req->ptr1, req->statdata); break;
826	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1108	case REQ_LSTAT: req->result = lstat (req->ptr1, req->statdata); break;
827	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1109	case REQ_FSTAT: req->result = fstat (req->int1, req->statdata); break;
828		1110
829	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1111	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
830	case REQ_CLOSE: req->result = close (req->fd); break;	1112	case REQ_CLOSE: req->result = close (req->int1); break;
831	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1113	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
832	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1114	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
833	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1115	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
834	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1116	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
835	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1117	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1118	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1119	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
836		1120
837	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1121	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
838	case REQ_FSYNC: req->result = fsync (req->fd); break;	1122	case REQ_FSYNC: req->result = fsync (req->int1); break;
839	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1123	case REQ_READDIR: scandir_ (req, self); break;
840		1124
841	case REQ_SLEEP:	1125	case REQ_BUSY:
842	{	1126	{
843	struct timeval tv;	1127	struct timeval tv;
844		1128
845	tv.tv_sec = req->fd;	1129	tv.tv_sec = req->int1;
846	tv.tv_usec = req->fd2;	1130	tv.tv_usec = req->int2;
847		1131
848	req->result = select (0, 0, 0, 0, &tv);	1132	req->result = select (0, 0, 0, 0, &tv);
849	}	1133	}
850		1134
851	case REQ_GROUP:	1135	case REQ_GROUP:
852	case REQ_NOP:	1136	case REQ_NOP:
		1137	break;
		1138
853	case REQ_QUIT:	1139	case REQ_QUIT:
854	break;	1140	goto quit;
855		1141
856	default:	1142	default:
857	req->result = ENOSYS;	1143	req->result = ENOSYS;
858	break;	1144	break;
859	}	1145	}
860		1146
861	req->errorno = errno;	1147	req->errorno = errno;
862		1148
863	pthread_mutex_lock (&reslock);	1149	LOCK (reslock);
864		1150
865	req->next = 0;	1151	++npending;
866		1152
867	if (rese)	1153	if (!reqq_push (&res_queue, req))
868	{
869	rese->next = req;
870	rese = req;
871	}
872	else
873	{
874	rese = ress = req;
875
876	/* write a dummy byte to the pipe so fh becomes ready */	1154	/* write a dummy byte to the pipe so fh becomes ready */
877	write (respipe [1], &respipe, 1);	1155	write (respipe [1], &respipe, 1);
878	}
879		1156
880	pthread_mutex_unlock (&reslock);	1157	self->req = 0;
		1158	worker_clear (self);
		1159
		1160	UNLOCK (reslock);
881	}	1161	}
882	while (type != REQ_QUIT);	1162
		1163	quit:
		1164	LOCK (wrklock);
		1165	worker_free (self);
		1166	UNLOCK (wrklock);
883		1167
884	return 0;	1168	return 0;
885	}	1169	}
886		1170
887	/*****************************************************************************/	1171	/*****************************************************************************/
888		1172
889	static void atfork_prepare (void)	1173	static void atfork_prepare (void)
890	{	1174	{
891	pthread_mutex_lock (&reqlock);	1175	LOCK (wrklock);
892	pthread_mutex_lock (&reslock);	1176	LOCK (reqlock);
		1177	LOCK (reslock);
893	#if !HAVE_PREADWRITE	1178	#if !HAVE_PREADWRITE
894	pthread_mutex_lock (&preadwritelock);	1179	LOCK (preadwritelock);
895	#endif	1180	#endif
896	#if !HAVE_READDIR_R	1181	#if !HAVE_READDIR_R
897	pthread_mutex_lock (&readdirlock);	1182	LOCK (readdirlock);
898	#endif	1183	#endif
899	}	1184	}
900		1185
901	static void atfork_parent (void)	1186	static void atfork_parent (void)
902	{	1187	{
903	#if !HAVE_READDIR_R	1188	#if !HAVE_READDIR_R
904	pthread_mutex_unlock (&readdirlock);	1189	UNLOCK (readdirlock);
905	#endif	1190	#endif
906	#if !HAVE_PREADWRITE	1191	#if !HAVE_PREADWRITE
907	pthread_mutex_unlock (&preadwritelock);	1192	UNLOCK (preadwritelock);
908	#endif	1193	#endif
909	pthread_mutex_unlock (&reslock);	1194	UNLOCK (reslock);
910	pthread_mutex_unlock (&reqlock);	1195	UNLOCK (reqlock);
		1196	UNLOCK (wrklock);
911	}	1197	}
912		1198
913	static void atfork_child (void)	1199	static void atfork_child (void)
914	{	1200	{
915	aio_req prv;	1201	aio_req prv;
916		1202
		1203	while (prv = reqq_shift (&req_queue))
		1204	req_free (prv);
		1205
		1206	while (prv = reqq_shift (&res_queue))
		1207	req_free (prv);
		1208
		1209	while (wrk_first.next != &wrk_first)
		1210	{
		1211	worker *wrk = wrk_first.next;
		1212
		1213	if (wrk->req)
		1214	req_free (wrk->req);
		1215
		1216	worker_clear (wrk);
		1217	worker_free (wrk);
		1218	}
		1219
917	started = 0;	1220	started = 0;
918		1221	idle = 0;
919	while (reqs)	1222	nreqs = 0;
920	{	1223	nready = 0;
921	prv = reqs;	1224	npending = 0;
922	reqs = prv->next;
923	req_free (prv);
924	}
925
926	reqs = reqe = 0;
927
928	while (ress)
929	{
930	prv = ress;
931	ress = prv->next;
932	req_free (prv);
933	}
934
935	ress = rese = 0;
936		1225
937	close (respipe [0]);	1226	close (respipe [0]);
938	close (respipe [1]);	1227	close (respipe [1]);
939	create_pipe ();	1228	create_pipe ();
940		1229
…		…
967	PROTOTYPES: ENABLE	1256	PROTOTYPES: ENABLE
968		1257
969	BOOT:	1258	BOOT:
970	{	1259	{
971	HV *stash = gv_stashpv ("IO::AIO", 1);	1260	HV *stash = gv_stashpv ("IO::AIO", 1);
		1261
972	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1262	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
973	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1263	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
974	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1264	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1265	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1266	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1267	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
975		1268
976	create_pipe ();	1269	create_pipe ();
977	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1270	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
978	}	1271	}
979		1272
980	void	1273	void
981	min_parallel (nthreads)	1274	max_poll_reqs (int nreqs)
982	int nthreads
983	PROTOTYPE: $	1275	PROTOTYPE: $
		1276	CODE:
		1277	max_poll_reqs = nreqs;
984		1278
985	void	1279	void
986	max_parallel (nthreads)	1280	max_poll_time (double nseconds)
987	int nthreads
988	PROTOTYPE: $	1281	PROTOTYPE: $
		1282	CODE:
		1283	max_poll_time = nseconds * AIO_TICKS;
		1284
		1285	void
		1286	min_parallel (int nthreads)
		1287	PROTOTYPE: $
		1288
		1289	void
		1290	max_parallel (int nthreads)
		1291	PROTOTYPE: $
		1292
		1293	void
		1294	max_idle (int nthreads)
		1295	PROTOTYPE: $
		1296	CODE:
		1297	set_max_idle (nthreads);
989		1298
990	int	1299	int
991	max_outstanding (nreqs)	1300	max_outstanding (int maxreqs)
992	int nreqs	1301	PROTOTYPE: $
993	PROTOTYPE: $
994	CODE:	1302	CODE:
995	RETVAL = max_outstanding;	1303	RETVAL = max_outstanding;
996	max_outstanding = nreqs;	1304	max_outstanding = maxreqs;
		1305	OUTPUT:
		1306	RETVAL
997		1307
998	void	1308	void
999	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1309	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
1000	SV * pathname	1310	SV * pathname
1001	int flags	1311	int flags
…		…
1005	PPCODE:	1315	PPCODE:
1006	{	1316	{
1007	dREQ;	1317	dREQ;
1008		1318
1009	req->type = REQ_OPEN;	1319	req->type = REQ_OPEN;
1010	req->data = newSVsv (pathname);	1320	req->sv1 = newSVsv (pathname);
1011	req->dataptr = SvPVbyte_nolen (req->data);	1321	req->ptr1 = SvPVbyte_nolen (pathname);
1012	req->fd = flags;	1322	req->int1 = flags;
1013	req->mode = mode;	1323	req->mode = mode;
1014		1324
1015	REQ_SEND;	1325	REQ_SEND;
1016	}	1326	}
1017		1327
…		…
1027	PPCODE:	1337	PPCODE:
1028	{	1338	{
1029	dREQ;	1339	dREQ;
1030		1340
1031	req->type = ix;	1341	req->type = ix;
1032	req->fh = newSVsv (fh);	1342	req->fh = newSVsv (fh);
1033	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1343	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1034		1344
1035	REQ_SEND (req);	1345	REQ_SEND (req);
1036	}	1346	}
1037		1347
1038	void	1348	void
…		…
1047	aio_read = REQ_READ	1357	aio_read = REQ_READ
1048	aio_write = REQ_WRITE	1358	aio_write = REQ_WRITE
1049	PROTOTYPE: $$$$$;$	1359	PROTOTYPE: $$$$$;$
1050	PPCODE:	1360	PPCODE:
1051	{	1361	{
1052	aio_req req;
1053	STRLEN svlen;	1362	STRLEN svlen;
1054	char *svptr = SvPVbyte (data, svlen);	1363	char *svptr = SvPVbyte (data, svlen);
1055		1364
1056	SvUPGRADE (data, SVt_PV);	1365	SvUPGRADE (data, SVt_PV);
1057	SvPOK_on (data);	1366	SvPOK_on (data);
…		…
1079		1388
1080	{	1389	{
1081	dREQ;	1390	dREQ;
1082		1391
1083	req->type = ix;	1392	req->type = ix;
1084	req->fh = newSVsv (fh);	1393	req->fh = newSVsv (fh);
1085	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1394	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1086	: IoOFP (sv_2io (fh)));	1395	: IoOFP (sv_2io (fh)));
1087	req->offset = offset;	1396	req->offs = offset;
1088	req->length = length;	1397	req->size = length;
1089	req->data = SvREFCNT_inc (data);	1398	req->sv1 = SvREFCNT_inc (data);
1090	req->dataptr = (char *)svptr + dataoffset;	1399	req->ptr1 = (char *)svptr + dataoffset;
		1400	req->stroffset = dataoffset;
1091		1401
1092	if (!SvREADONLY (data))	1402	if (!SvREADONLY (data))
1093	{	1403	{
1094	SvREADONLY_on (data);	1404	SvREADONLY_on (data);
1095	req->data2ptr = (void *)data;	1405	req->flags |= FLAG_DATA_RO_OFF;
1096	}	1406	}
1097		1407
1098	REQ_SEND;	1408	REQ_SEND;
1099	}	1409	}
		1410	}
		1411
		1412	void
		1413	aio_readlink (path,callback=&PL_sv_undef)
		1414	SV * path
		1415	SV * callback
		1416	PROTOTYPE: $$;$
		1417	PPCODE:
		1418	{
		1419	SV *data;
		1420	dREQ;
		1421
		1422	data = newSV (NAME_MAX);
		1423	SvPOK_on (data);
		1424
		1425	req->type = REQ_READLINK;
		1426	req->fh = newSVsv (path);
		1427	req->ptr2 = SvPVbyte_nolen (path);
		1428	req->sv1 = data;
		1429	req->ptr1 = SvPVbyte_nolen (data);
		1430
		1431	REQ_SEND;
1100	}	1432	}
1101		1433
1102	void	1434	void
1103	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1435	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
1104	SV * out_fh	1436	SV * out_fh
…		…
1110	PPCODE:	1442	PPCODE:
1111	{	1443	{
1112	dREQ;	1444	dREQ;
1113		1445
1114	req->type = REQ_SENDFILE;	1446	req->type = REQ_SENDFILE;
1115	req->fh = newSVsv (out_fh);	1447	req->fh = newSVsv (out_fh);
1116	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1448	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1117	req->fh2 = newSVsv (in_fh);	1449	req->sv2 = newSVsv (in_fh);
1118	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1450	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1119	req->offset = in_offset;	1451	req->offs = in_offset;
1120	req->length = length;	1452	req->size = length;
1121		1453
1122	REQ_SEND;	1454	REQ_SEND;
1123	}	1455	}
1124		1456
1125	void	1457	void
…		…
1132	PPCODE:	1464	PPCODE:
1133	{	1465	{
1134	dREQ;	1466	dREQ;
1135		1467
1136	req->type = REQ_READAHEAD;	1468	req->type = REQ_READAHEAD;
1137	req->fh = newSVsv (fh);	1469	req->fh = newSVsv (fh);
1138	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1470	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1139	req->offset = offset;	1471	req->offs = offset;
1140	req->length = length;	1472	req->size = length;
1141		1473
1142	REQ_SEND;	1474	REQ_SEND;
1143	}	1475	}
1144		1476
1145	void	1477	void
…		…
1161	}	1493	}
1162		1494
1163	if (SvPOK (fh_or_path))	1495	if (SvPOK (fh_or_path))
1164	{	1496	{
1165	req->type = ix;	1497	req->type = ix;
1166	req->data = newSVsv (fh_or_path);	1498	req->sv1 = newSVsv (fh_or_path);
1167	req->dataptr = SvPVbyte_nolen (req->data);	1499	req->ptr1 = SvPVbyte_nolen (fh_or_path);
1168	}	1500	}
1169	else	1501	else
1170	{	1502	{
1171	req->type = REQ_FSTAT;	1503	req->type = REQ_FSTAT;
1172	req->fh = newSVsv (fh_or_path);	1504	req->fh = newSVsv (fh_or_path);
1173	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1505	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1174	}	1506	}
1175		1507
1176	REQ_SEND;	1508	REQ_SEND;
1177	}	1509	}
1178		1510
1179	void	1511	void
1180	aio_unlink (pathname,callback=&PL_sv_undef)	1512	aio_unlink (pathname,callback=&PL_sv_undef)
1181	SV * pathname	1513	SV * pathname
1182	SV * callback	1514	SV * callback
1183	ALIAS:	1515	ALIAS:
1184	aio_unlink = REQ_UNLINK	1516	aio_unlink = REQ_UNLINK
1185	aio_rmdir = REQ_RMDIR	1517	aio_rmdir = REQ_RMDIR
1186	aio_readdir = REQ_READDIR	1518	aio_readdir = REQ_READDIR
1187	PPCODE:	1519	PPCODE:
1188	{	1520	{
1189	dREQ;	1521	dREQ;
1190		1522
1191	req->type = ix;	1523	req->type = ix;
1192	req->data = newSVsv (pathname);	1524	req->sv1 = newSVsv (pathname);
1193	req->dataptr = SvPVbyte_nolen (req->data);	1525	req->ptr1 = SvPVbyte_nolen (pathname);
1194		1526
1195	REQ_SEND;	1527	REQ_SEND;
1196	}	1528	}
1197		1529
1198	void	1530	void
1199	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1531	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1200	SV * oldpath	1532	SV * oldpath
1201	SV * newpath	1533	SV * newpath
1202	SV * callback	1534	SV * callback
1203	ALIAS:	1535	ALIAS:
1204	aio_link = REQ_LINK	1536	aio_link = REQ_LINK
1205	aio_symlink = REQ_SYMLINK	1537	aio_symlink = REQ_SYMLINK
1206	aio_rename = REQ_RENAME	1538	aio_rename = REQ_RENAME
1207	PPCODE:	1539	PPCODE:
1208	{	1540	{
1209	dREQ;	1541	dREQ;
1210		1542
1211	req->type = ix;	1543	req->type = ix;
1212	req->fh = newSVsv (oldpath);	1544	req->fh = newSVsv (oldpath);
1213	req->data2ptr = SvPVbyte_nolen (req->fh);	1545	req->ptr2 = SvPVbyte_nolen (req->fh);
1214	req->data = newSVsv (newpath);	1546	req->sv1 = newSVsv (newpath);
1215	req->dataptr = SvPVbyte_nolen (req->data);	1547	req->ptr1 = SvPVbyte_nolen (newpath);
1216		1548
1217	REQ_SEND;	1549	REQ_SEND;
1218	}	1550	}
1219		1551
1220	void	1552	void
1221	aio_sleep (delay,callback=&PL_sv_undef)	1553	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1222	double delay	1554	SV * pathname
1223	SV * callback	1555	SV * callback
		1556	UV mode
		1557	UV dev
1224	PPCODE:	1558	PPCODE:
1225	{	1559	{
1226	dREQ;	1560	dREQ;
		1561
		1562	req->type = REQ_MKNOD;
		1563	req->sv1 = newSVsv (pathname);
		1564	req->ptr1 = SvPVbyte_nolen (pathname);
		1565	req->mode = (mode_t)mode;
		1566	req->offs = dev;
		1567
		1568	REQ_SEND;
		1569	}
1227		1570
		1571	void
		1572	aio_busy (delay,callback=&PL_sv_undef)
		1573	double delay
		1574	SV * callback
		1575	PPCODE:
		1576	{
		1577	dREQ;
		1578
1228	req->type = REQ_SLEEP;	1579	req->type = REQ_BUSY;
1229	req->fd = delay < 0. ? 0 : delay;	1580	req->int1 = delay < 0. ? 0 : delay;
1230	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1581	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1231		1582
1232	REQ_SEND;	1583	REQ_SEND;
1233	}	1584	}
1234		1585
1235	void	1586	void
…		…
1239	PPCODE:	1590	PPCODE:
1240	{	1591	{
1241	dREQ;	1592	dREQ;
1242		1593
1243	req->type = REQ_GROUP;	1594	req->type = REQ_GROUP;
		1595
1244	req_send (req);	1596	req_send (req);
1245
1246	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1597	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1247	}	1598	}
1248		1599
1249	void	1600	void
1250	aio_nop (callback=&PL_sv_undef)	1601	aio_nop (callback=&PL_sv_undef)
1251	SV * callback	1602	SV * callback
1252	PPCODE:	1603	PPCODE:
1253	{	1604	{
1254	dREQ;	1605	dREQ;
1255		1606
1256	req->type = REQ_NOP;	1607	req->type = REQ_NOP;
1257		1608
1258	REQ_SEND;	1609	REQ_SEND;
1259	}	1610	}
1260		1611
1261	#if 0	1612	int
1262		1613	aioreq_pri (int pri = 0)
1263	void	1614	PROTOTYPE: ;$
1264	aio_pri (int pri = DEFAULT_PRI)
1265	CODE:	1615	CODE:
		1616	RETVAL = next_pri - PRI_BIAS;
		1617	if (items > 0)
		1618	{
1266	if (pri < PRI_MIN) pri = PRI_MIN;	1619	if (pri < PRI_MIN) pri = PRI_MIN;
1267	if (pri > PRI_MAX) pri = PRI_MAX;	1620	if (pri > PRI_MAX) pri = PRI_MAX;
1268	next_pri = pri + PRI_BIAS;	1621	next_pri = pri + PRI_BIAS;
		1622	}
		1623	OUTPUT:
		1624	RETVAL
1269		1625
1270	#endif	1626	void
		1627	aioreq_nice (int nice = 0)
		1628	CODE:
		1629	nice = next_pri - nice;
		1630	if (nice < PRI_MIN) nice = PRI_MIN;
		1631	if (nice > PRI_MAX) nice = PRI_MAX;
		1632	next_pri = nice + PRI_BIAS;
1271		1633
1272	void	1634	void
1273	flush ()	1635	flush ()
1274	PROTOTYPE:	1636	PROTOTYPE:
1275	CODE:	1637	CODE:
1276	while (nreqs)	1638	while (nreqs)
1277	{	1639	{
1278	poll_wait ();	1640	poll_wait ();
1279	poll_cb ();	1641	poll_cb (0);
1280	}	1642	}
1281		1643
1282	void	1644	void
1283	poll()	1645	poll()
1284	PROTOTYPE:	1646	PROTOTYPE:
1285	CODE:	1647	CODE:
1286	if (nreqs)	1648	if (nreqs)
1287	{	1649	{
1288	poll_wait ();	1650	poll_wait ();
1289	poll_cb ();	1651	poll_cb (0);
1290	}	1652	}
1291		1653
1292	int	1654	int
1293	poll_fileno()	1655	poll_fileno()
1294	PROTOTYPE:	1656	PROTOTYPE:
…		…
1318	CODE:	1680	CODE:
1319	RETVAL = nreqs;	1681	RETVAL = nreqs;
1320	OUTPUT:	1682	OUTPUT:
1321	RETVAL	1683	RETVAL
1322		1684
		1685	int
		1686	nready()
		1687	PROTOTYPE:
		1688	CODE:
		1689	RETVAL = get_nready ();
		1690	OUTPUT:
		1691	RETVAL
		1692
		1693	int
		1694	npending()
		1695	PROTOTYPE:
		1696	CODE:
		1697	RETVAL = get_npending ();
		1698	OUTPUT:
		1699	RETVAL
		1700
		1701	int
		1702	nthreads()
		1703	PROTOTYPE:
		1704	CODE:
		1705	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1706	RETVAL = started;
		1707	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1708	OUTPUT:
		1709	RETVAL
		1710
1323	PROTOTYPES: DISABLE	1711	PROTOTYPES: DISABLE
1324		1712
1325	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1713	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1326		1714
1327	void	1715	void
1328	cancel (aio_req_ornot req)	1716	cancel (aio_req_ornot req)
1329	PROTOTYPE:
1330	CODE:	1717	CODE:
1331	req_cancel (req);	1718	req_cancel (req);
1332		1719
1333	void	1720	void
1334	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1721	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
…		…
1343	PPCODE:	1730	PPCODE:
1344	{	1731	{
1345	int i;	1732	int i;
1346	aio_req req;	1733	aio_req req;
1347		1734
1348	if (grp->fd == 2)	1735	if (grp->int1 == 2)
1349	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1736	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1350		1737
1351	for (i = 1; i < items; ++i )	1738	for (i = 1; i < items; ++i )
1352	{	1739	{
1353	if (GIMME_V != G_VOID)	1740	if (GIMME_V != G_VOID)
…		…
1355		1742
1356	req = SvAIO_REQ (ST (i));	1743	req = SvAIO_REQ (ST (i));
1357		1744
1358	if (req)	1745	if (req)
1359	{	1746	{
1360	++grp->length;	1747	++grp->size;
1361	req->grp = grp;	1748	req->grp = grp;
1362		1749
1363	req->grp_prev = 0;	1750	req->grp_prev = 0;
1364	req->grp_next = grp->grp_first;	1751	req->grp_next = grp->grp_first;
1365		1752
…		…
1370	}	1757	}
1371	}	1758	}
1372	}	1759	}
1373		1760
1374	void	1761	void
		1762	cancel_subs (aio_req_ornot req)
		1763	CODE:
		1764	req_cancel_subs (req);
		1765
		1766	void
1375	result (aio_req grp, ...)	1767	result (aio_req grp, ...)
1376	CODE:	1768	CODE:
1377	{	1769	{
1378	int i;	1770	int i;
		1771	AV *av;
		1772
		1773	grp->errorno = errno;
		1774
1379	AV *av = newAV ();	1775	av = newAV ();
1380		1776
1381	for (i = 1; i < items; ++i )	1777	for (i = 1; i < items; ++i )
1382	av_push (av, newSVsv (ST (i)));	1778	av_push (av, newSVsv (ST (i)));
1383		1779
1384	SvREFCNT_dec (grp->data);	1780	SvREFCNT_dec (grp->sv1);
1385	grp->data = (SV *)av;	1781	grp->sv1 = (SV *)av;
1386	}	1782	}
1387		1783
1388	void	1784	void
		1785	errno (aio_req grp, int errorno = errno)
		1786	CODE:
		1787	grp->errorno = errorno;
		1788
		1789	void
1389	feed_limit (aio_req grp, int limit)	1790	limit (aio_req grp, int limit)
1390	CODE:	1791	CODE:
1391	grp->fd2 = limit;	1792	grp->int2 = limit;
1392	aio_grp_feed (grp);	1793	aio_grp_feed (grp);
1393		1794
1394	void	1795	void
1395	feed (aio_req grp, SV *callback=&PL_sv_undef)	1796	feed (aio_req grp, SV *callback=&PL_sv_undef)
1396	CODE:	1797	CODE:
1397	{	1798	{
1398	SvREFCNT_dec (grp->fh2);	1799	SvREFCNT_dec (grp->sv2);
1399	grp->fh2 = newSVsv (callback);	1800	grp->sv2 = newSVsv (callback);
1400		1801
1401	if (grp->fd2 <= 0)	1802	if (grp->int2 <= 0)
1402	grp->fd2 = 2;	1803	grp->int2 = 2;
1403		1804
1404	aio_grp_feed (grp);	1805	aio_grp_feed (grp);
1405	}	1806	}
1406		1807

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