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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.53 by root, Mon Oct 23 00:17:07 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_SLEEP,	102	REQ_GROUP, REQ_NOP,
61	REQ_GROUP,	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
		113	SV *callback, *fh;
		114	SV *sv1, *sv2;
		115	void *ptr1, *ptr2;
		116	Stat_t *statdata;
		117	off_t offs;
		118	size_t size;
		119	ssize_t result;
		120
		121	STRLEN stroffset;
		122	int type;
		123	int int1, int2;
		124	int errorno;
		125	mode_t mode; /* open */
		126
		127	unsigned char flags;
		128	unsigned char pri;
		129
		130	SV *self; /* the perl counterpart of this request, if any */
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;
76	SV *fh, *fh2;
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */
88	unsigned char cancelled;
89	} aio_cb;	132	} aio_cb;
		133
		134	enum {
		135	FLAG_CANCELLED = 0x01,
		136	FLAG_DATA_RO_OFF = 0x80, /* data was set readonly */
		137	};
90		138
91	typedef aio_cb *aio_req;	139	typedef aio_cb *aio_req;
92	typedef aio_cb *aio_req_ornot;	140	typedef aio_cb *aio_req_ornot;
93		141
		142	enum {
		143	PRI_MIN = -4,
		144	PRI_MAX = 4,
		145
		146	DEFAULT_PRI = 0,
		147	PRI_BIAS = -PRI_MIN,
		148	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		149	};
		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
		163	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		164
94	static int started, wanted;	165	static unsigned int started, idle, wanted;
95	static volatile int nreqs;	166
96	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;
97	static int respipe [2];	219	static int respipe [2];
98		220
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	221	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	222	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	223	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		224
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	225	#if WORDACCESS_UNSAFE
104	static volatile aio_req ress, rese; /* queue start, queue end */
105		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 ();
106	static void req_invoke (aio_req req);	323	static void req_invoke (aio_req req);
107	static void req_free (aio_req req);	324	static void req_free (aio_req req);
		325	static void req_cancel (aio_req req);
108		326
109	/* must be called at most once */	327	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	328	static SV *req_sv (aio_req req, const char *klass)
111	{	329	{
112	if (!req->self)	330	if (!req->self)
…		…
130	return mg ? (aio_req)mg->mg_ptr : 0;	348	return mg ? (aio_req)mg->mg_ptr : 0;
131	}	349	}
132		350
133	static void aio_grp_feed (aio_req grp)	351	static void aio_grp_feed (aio_req grp)
134	{	352	{
135	while (grp->length < grp->fd2)	353	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
136	{	354	{
137	int old_len = grp->length;	355	int old_len = grp->size;
138		356
139	if (grp->fh2 && SvOK (grp->fh2))	357	if (grp->sv2 && SvOK (grp->sv2))
140	{	358	{
141	dSP;	359	dSP;
142		360
143	ENTER;	361	ENTER;
144	SAVETMPS;	362	SAVETMPS;
145	PUSHMARK (SP);	363	PUSHMARK (SP);
146	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	364	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
147	PUTBACK;	365	PUTBACK;
148	call_sv (grp->fh2, G_VOID | G_EVAL);	366	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
149	SPAGAIN;	367	SPAGAIN;
150	FREETMPS;	368	FREETMPS;
151	LEAVE;	369	LEAVE;
152	}	370	}
153		371
154	/* stop if no progress has been made */	372	/* stop if no progress has been made */
155	if (old_len == grp->length)	373	if (old_len == grp->size)
156	{	374	{
157	SvREFCNT_dec (grp->fh2);	375	SvREFCNT_dec (grp->sv2);
158	grp->fh2 = 0;	376	grp->sv2 = 0;
159	break;	377	break;
160	}	378	}
161	}	379	}
162	}	380	}
163		381
164	static void aio_grp_dec (aio_req grp)	382	static void aio_grp_dec (aio_req grp)
165	{	383	{
166	--grp->length;	384	--grp->size;
167		385
168	/* call feeder, if applicable */	386	/* call feeder, if applicable */
169	aio_grp_feed (grp);	387	aio_grp_feed (grp);
170		388
171	/* finish, if done */	389	/* finish, if done */
172	if (!grp->length && grp->fd)	390	if (!grp->size && grp->int1)
173	{	391	{
174	req_invoke (grp);	392	req_invoke (grp);
175	req_free (grp);	393	req_free (grp);
176	}	394	}
177	}	395	}
178		396
179	static void poll_wait ()
180	{
181	if (nreqs && !ress)
182	{
183	fd_set rfd;
184	FD_ZERO(&rfd);
185	FD_SET(respipe [0], &rfd);
186
187	select (respipe [0] + 1, &rfd, 0, 0, 0);
188	}
189	}
190
191	static void req_invoke (aio_req req)	397	static void req_invoke (aio_req req)
192	{	398	{
193	dSP;	399	dSP;
194	int errorno = errno;
195		400
196	if (req->cancelled || !SvOK (req->callback))	401	if (req->flags & FLAG_DATA_RO_OFF)
197	return;	402	SvREADONLY_off (req->sv1);
198		403
199	errno = req->errorno;	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	}
200		410
		411	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		412	{
201	ENTER;	413	ENTER;
202	SAVETMPS;	414	SAVETMPS;
203	PUSHMARK (SP);	415	PUSHMARK (SP);
204	EXTEND (SP, 1);	416	EXTEND (SP, 1);
205		417
206	switch (req->type)	418	switch (req->type)
207	{
208	case REQ_READDIR:
209	{	419	{
210	SV *rv = &PL_sv_undef;	420	case REQ_READDIR:
211
212	if (req->result >= 0)
213	{	421	{
214	char *buf = req->data2ptr;	422	SV *rv = &PL_sv_undef;
215	AV *av = newAV ();
216		423
217	while (req->result)	424	if (req->result >= 0)
218	{	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	{
219	SV *sv = newSVpv (buf, 0);	434	SV *sv = newSVpv (buf, 0);
220		435
221	av_push (av, sv);	436	av_store (av, i, sv);
222	buf += SvCUR (sv) + 1;	437	buf += SvCUR (sv) + 1;
223	req->result--;	438	}
		439
		440	rv = sv_2mortal (newRV_noinc ((SV *)av));
224	}	441	}
225		442
226	rv = sv_2mortal (newRV_noinc ((SV *)av));	443	PUSHs (rv);
227	}	444	}
		445	break;
228		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;
229	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;
230	}	498	}
231	break;
232		499
233	case REQ_OPEN:	500	errno = req->errorno;
234	{
235	/* convert fd to fh */
236	SV *fh;
237		501
238	PUSHs (sv_2mortal (newSViv (req->result)));
239	PUTBACK;	502	PUTBACK;
240	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
241	SPAGAIN;
242
243	fh = SvREFCNT_inc (POPs);
244
245	PUSHMARK (SP);
246	XPUSHs (sv_2mortal (fh));
247	}
248	break;
249
250	case REQ_GROUP:
251	req->fd = 2; /* mark group as finished */
252
253	if (req->data)
254	{
255	int i;
256	AV *av = (AV *)req->data;
257
258	EXTEND (SP, AvFILL (av) + 1);
259	for (i = 0; i <= AvFILL (av); ++i)
260	PUSHs (*av_fetch (av, i, 0));
261	}
262	break;
263
264	case REQ_SLEEP:
265	break;
266
267	default:
268	PUSHs (sv_2mortal (newSViv (req->result)));
269	break;
270	}
271
272
273	PUTBACK;
274	call_sv (req->callback, G_VOID | G_EVAL);	503	call_sv (req->callback, G_VOID | G_EVAL);
275	SPAGAIN;	504	SPAGAIN;
276		505
277	FREETMPS;	506	FREETMPS;
278	LEAVE;	507	LEAVE;
279
280	errno = errorno;
281
282	if (SvTRUE (ERRSV))
283	{	508	}
284	req_free (req);
285	croak (0);
286	}
287	}
288		509
289	static void req_free (aio_req req)
290	{
291	if (req->grp)	510	if (req->grp)
292	{	511	{
293	aio_req grp = req->grp;	512	aio_req grp = req->grp;
294		513
295	/* unlink request */	514	/* unlink request */
…		…
300	grp->grp_first = req->grp_next;	519	grp->grp_first = req->grp_next;
301		520
302	aio_grp_dec (grp);	521	aio_grp_dec (grp);
303	}	522	}
304		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	{
305	if (req->self)	533	if (req->self)
306	{	534	{
307	sv_unmagic (req->self, PERL_MAGIC_ext);	535	sv_unmagic (req->self, PERL_MAGIC_ext);
308	SvREFCNT_dec (req->self);	536	SvREFCNT_dec (req->self);
309	}	537	}
310		538
311	SvREFCNT_dec (req->data);
312	SvREFCNT_dec (req->fh);	539	SvREFCNT_dec (req->fh);
		540	SvREFCNT_dec (req->sv1);
313	SvREFCNT_dec (req->fh2);	541	SvREFCNT_dec (req->sv2);
314	SvREFCNT_dec (req->callback);	542	SvREFCNT_dec (req->callback);
315	Safefree (req->statdata);	543	Safefree (req->statdata);
316		544
317	if (req->type == REQ_READDIR && req->result >= 0)	545	if (req->type == REQ_READDIR)
318	free (req->data2ptr);	546	free (req->ptr2);
319		547
320	Safefree (req);	548	Safefree (req);
321	}	549	}
322		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
323	static void req_cancel (aio_req req)	565	static void req_cancel (aio_req req)
324	{	566	{
325	req->cancelled = 1;	567	req->flags |= FLAG_CANCELLED;
326		568
327	if (req->type == REQ_GROUP)	569	req_cancel_subs (req);
328	{
329	aio_req sub;
330
331	for (sub = req->grp_first; sub; sub = sub->grp_next)
332	req_cancel (sub);
333	}
334	}
335
336	static int poll_cb ()
337	{
338	dSP;
339	int count = 0;
340	int do_croak = 0;
341	aio_req req;
342
343	for (;;)
344	{
345	pthread_mutex_lock (&reslock);
346	req = ress;
347
348	if (req)
349	{
350	ress = req->next;
351
352	if (!ress)
353	{
354	/* read any signals sent by the worker threads */
355	char buf [32];
356	while (read (respipe [0], buf, 32) == 32)
357	;
358
359	rese = 0;
360	}
361	}
362
363	pthread_mutex_unlock (&reslock);
364
365	if (!req)
366	break;
367
368	--nreqs;
369
370	if (req->type == REQ_QUIT)
371	started--;
372	else if (req->type == REQ_GROUP && req->length)
373	{
374	req->fd = 1; /* mark request as delayed */
375	continue;
376	}
377	else
378	{
379	if (req->type == REQ_READ)
380	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
381
382	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
383	SvREADONLY_off (req->data);
384
385	if (req->statdata)
386	{
387	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
388	PL_laststatval = req->result;
389	PL_statcache = *(req->statdata);
390	}
391
392	req_invoke (req);
393
394	count++;
395	}
396
397	req_free (req);
398	}
399
400	return count;
401	}	570	}
402		571
403	static void *aio_proc(void *arg);	572	static void *aio_proc(void *arg);
404		573
405	static void start_thread (void)	574	static void start_thread (void)
406	{	575	{
407	sigset_t fullsigset, oldsigset;	576	sigset_t fullsigset, oldsigset;
408	pthread_t tid;
409	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");
410		583
411	pthread_attr_init (&attr);	584	pthread_attr_init (&attr);
412	pthread_attr_setstacksize (&attr, STACKSIZE);	585	pthread_attr_setstacksize (&attr, STACKSIZE);
413	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
414		590
415	sigfillset (&fullsigset);	591	sigfillset (&fullsigset);
		592
		593	LOCK (wrklock);
416	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	594	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
417		595
418	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;
419	started++;	602	++started;
		603	}
		604	else
		605	free (wrk);
420		606
421	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 ();
422	}	621	}
423		622
424	static void req_send (aio_req req)	623	static void req_send (aio_req req)
425	{	624	{
426	while (started < wanted && nreqs >= started)
427	start_thread ();
428
429	++nreqs;	625	++nreqs;
430		626
431	pthread_mutex_lock (&reqlock);	627	LOCK (reqlock);
432		628	++nready;
433	req->next = 0;	629	reqq_push (&req_queue, req);
434
435	if (reqe)
436	{
437	reqe->next = req;
438	reqe = req;
439	}
440	else
441	reqe = reqs = req;
442
443	pthread_cond_signal (&reqwait);	630	pthread_cond_signal (&reqwait);
444	pthread_mutex_unlock (&reqlock);	631	UNLOCK (reqlock);
445		632
446	if (nreqs > max_outstanding)	633	maybe_start_thread ();
447	for (;;)
448	{
449	poll_cb ();
450
451	if (nreqs <= max_outstanding)
452	break;
453
454	poll_wait ();
455	}
456	}	634	}
457		635
458	static void end_thread (void)	636	static void end_thread (void)
459	{	637	{
460	aio_req req;	638	aio_req req;
		639
461	Newz (0, req, 1, aio_cb);	640	Newz (0, req, 1, aio_cb);
		641
462	req->type = REQ_QUIT;	642	req->type = REQ_QUIT;
		643	req->pri = PRI_MAX + PRI_BIAS;
463		644
464	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);
465	}	660	}
466		661
467	static void min_parallel (int nthreads)	662	static void min_parallel (int nthreads)
468	{	663	{
469	if (wanted < nthreads)	664	if (wanted < nthreads)
470	wanted = nthreads;	665	wanted = nthreads;
471	}	666	}
472		667
473	static void max_parallel (int nthreads)	668	static void max_parallel (int nthreads)
474	{	669	{
475	int cur = started;
476
477	if (wanted > nthreads)	670	if (wanted > nthreads)
478	wanted = nthreads;	671	wanted = nthreads;
479		672
480	while (cur > wanted)
481	{
482	end_thread ();
483	cur--;
484	}
485
486	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);
487	{	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
488	poll_wait ();	770	poll_wait ();
489	poll_cb ();	771
		772	++maxreqs;
490	}	773	}
		774
		775	return count;
491	}	776	}
492		777
493	static void create_pipe ()	778	static void create_pipe ()
494	{	779	{
495	if (pipe (respipe))	780	if (pipe (respipe))
…		…
519	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)
520	{	805	{
521	ssize_t res;	806	ssize_t res;
522	off_t ooffset;	807	off_t ooffset;
523		808
524	pthread_mutex_lock (&preadwritelock);	809	LOCK (preadwritelock);
525	ooffset = lseek (fd, 0, SEEK_CUR);	810	ooffset = lseek (fd, 0, SEEK_CUR);
526	lseek (fd, offset, SEEK_SET);	811	lseek (fd, offset, SEEK_SET);
527	res = read (fd, buf, count);	812	res = read (fd, buf, count);
528	lseek (fd, ooffset, SEEK_SET);	813	lseek (fd, ooffset, SEEK_SET);
529	pthread_mutex_unlock (&preadwritelock);	814	UNLOCK (preadwritelock);
530		815
531	return res;	816	return res;
532	}	817	}
533		818
534	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)
535	{	820	{
536	ssize_t res;	821	ssize_t res;
537	off_t ooffset;	822	off_t ooffset;
538		823
539	pthread_mutex_lock (&preadwritelock);	824	LOCK (preadwritelock);
540	ooffset = lseek (fd, 0, SEEK_CUR);	825	ooffset = lseek (fd, 0, SEEK_CUR);
541	lseek (fd, offset, SEEK_SET);	826	lseek (fd, offset, SEEK_SET);
542	res = write (fd, buf, count);	827	res = write (fd, buf, count);
543	lseek (fd, offset, SEEK_SET);	828	lseek (fd, offset, SEEK_SET);
544	pthread_mutex_unlock (&preadwritelock);	829	UNLOCK (preadwritelock);
545		830
546	return res;	831	return res;
547	}	832	}
548	#endif	833	#endif
549		834
550	#if !HAVE_FDATASYNC	835	#if !HAVE_FDATASYNC
551	# define fdatasync fsync	836	# define fdatasync fsync
552	#endif	837	#endif
553		838
554	#if !HAVE_READAHEAD	839	#if !HAVE_READAHEAD
555	# define readahead aio_readahead	840	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
556		841
557	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)
558	{	843	{
559	char readahead_buf[4096];	844	dBUF;
560		845
561	while (count > 0)	846	while (count > 0)
562	{	847	{
563	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	848	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
564		849
565	pread (fd, readahead_buf, len, offset);	850	pread (fd, aio_buf, len, offset);
566	offset += len;	851	offset += len;
567	count -= len;	852	count -= len;
568	}	853	}
569		854
570	errno = 0;	855	errno = 0;
571	}	856	}
		857
572	#endif	858	#endif
573		859
574	#if !HAVE_READDIR_R	860	#if !HAVE_READDIR_R
575	# define readdir_r aio_readdir_r	861	# define readdir_r aio_readdir_r
576		862
…		…
579	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)
580	{	866	{
581	struct dirent *e;	867	struct dirent *e;
582	int errorno;	868	int errorno;
583		869
584	pthread_mutex_lock (&readdirlock);	870	LOCK (readdirlock);
585		871
586	e = readdir (dirp);	872	e = readdir (dirp);
587	errorno = errno;	873	errorno = errno;
588		874
589	if (e)	875	if (e)
…		…
592	strcpy (ent->d_name, e->d_name);	878	strcpy (ent->d_name, e->d_name);
593	}	879	}
594	else	880	else
595	*res = 0;	881	*res = 0;
596		882
597	pthread_mutex_unlock (&readdirlock);	883	UNLOCK (readdirlock);
598		884
599	errno = errorno;	885	errno = errorno;
600	return e ? 0 : -1;	886	return e ? 0 : -1;
601	}	887	}
602	#endif	888	#endif
603		889
604	/* sendfile always needs emulation */	890	/* sendfile always needs emulation */
605	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)
606	{	892	{
607	ssize_t res;	893	ssize_t res;
608		894
609	if (!count)	895	if (!count)
610	return 0;	896	return 0;
…		…
621	{	907	{
622	off_t sbytes;	908	off_t sbytes;
623	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	909	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
624		910
625	if (res < 0 && sbytes)	911	if (res < 0 && sbytes)
626	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	912	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
627	res = sbytes;	913	res = sbytes;
628	}	914	}
629		915
630	# elif __hpux	916	# elif __hpux
631	res = sendfile (ofd, ifd, offset, count, 0, 0);	917	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
659	#endif	945	#endif
660	)	946	)
661	)	947	)
662	{	948	{
663	/* emulate sendfile. this is a major pain in the ass */	949	/* emulate sendfile. this is a major pain in the ass */
664	char buf[4096];	950	dBUF;
		951
665	res = 0;	952	res = 0;
666		953
667	while (count)	954	while (count)
668	{	955	{
669	ssize_t cnt;	956	ssize_t cnt;
670		957
671	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	958	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
672		959
673	if (cnt <= 0)	960	if (cnt <= 0)
674	{	961	{
675	if (cnt && !res) res = -1;	962	if (cnt && !res) res = -1;
676	break;	963	break;
677	}	964	}
678		965
679	cnt = write (ofd, buf, cnt);	966	cnt = write (ofd, aio_buf, cnt);
680		967
681	if (cnt <= 0)	968	if (cnt <= 0)
682	{	969	{
683	if (cnt && !res) res = -1;	970	if (cnt && !res) res = -1;
684	break;	971	break;
…		…
692		979
693	return res;	980	return res;
694	}	981	}
695		982
696	/* read a full directory */	983	/* read a full directory */
697	static int scandir_ (const char *path, void **namesp)	984	static void scandir_ (aio_req req, worker *self)
698	{	985	{
699	DIR *dirp = opendir (path);	986	DIR *dirp;
700	union	987	union
701	{	988	{
702	struct dirent d;	989	struct dirent d;
703	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	990	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
704	} u;	991	} *u;
705	struct dirent *entp;	992	struct dirent *entp;
706	char *name, *names;	993	char *name, *names;
707	int memlen = 4096;	994	int memlen = 4096;
708	int memofs = 0;	995	int memofs = 0;
709	int res = 0;	996	int res = 0;
710	int errorno;	997	int errorno;
711		998
712	if (!dirp)	999	LOCK (wrklock);
713	return -1;	1000	self->dirp = dirp = opendir (req->ptr1);
714		1001	self->dbuf = u = malloc (sizeof (*u));
715	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);
716		1055
717	for (;;)	1056	for (;;)
718	{	1057	{
719	errno = 0, readdir_r (dirp, &u.d, &entp);	1058	ts.tv_sec = time (0) + IDLE_TIMEOUT;
720		1059
721	if (!entp)	1060	LOCK (reqlock);
722	break;
723
724	name = entp->d_name;
725
726	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
727	{
728	int len = strlen (name) + 1;
729
730	res++;
731
732	while (memofs + len > memlen)
733	{
734	memlen *= 2;
735	names = realloc (names, memlen);
736	if (!names)
737	break;
738	}
739
740	memcpy (names + memofs, name, len);
741	memofs += len;
742	}
743	}
744
745	errorno = errno;
746	closedir (dirp);
747
748	if (errorno)
749	{
750	free (names);
751	errno = errorno;
752	res = -1;
753	}
754
755	*namesp = (void *)names;
756	return res;
757	}
758
759	/*****************************************************************************/
760
761	static void *aio_proc (void *thr_arg)
762	{
763	aio_req req;
764	int type;
765
766	do
767	{
768	pthread_mutex_lock (&reqlock);
769		1061
770	for (;;)	1062	for (;;)
771	{	1063	{
772	req = reqs;	1064	self->req = req = reqq_shift (&req_queue);
773
774	if (reqs)
775	{
776	reqs = reqs->next;
777	if (!reqs) reqe = 0;
778	}
779		1065
780	if (req)	1066	if (req)
781	break;	1067	break;
782		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 */
783	pthread_cond_wait (&reqwait, &reqlock);	1085	pthread_cond_wait (&reqwait, &reqlock);
		1086	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1087	}
		1088
		1089	--idle;
784	}	1090	}
785		1091
786	pthread_mutex_unlock (&reqlock);	1092	--nready;
		1093
		1094	UNLOCK (reqlock);
787		1095
788	errno = 0; /* strictly unnecessary */	1096	errno = 0; /* strictly unnecessary */
789		1097
790	if (!req->cancelled)	1098	if (!(req->flags & FLAG_CANCELLED))
791	switch (type = req->type) /* remember type for QUIT check */	1099	switch (req->type)
792	{	1100	{
793	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;
794	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;
795		1103
796	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;
797	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;
798		1106
799	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1107	case REQ_STAT: req->result = stat (req->ptr1, req->statdata); break;
800	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1108	case REQ_LSTAT: req->result = lstat (req->ptr1, req->statdata); break;
801	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1109	case REQ_FSTAT: req->result = fstat (req->int1, req->statdata); break;
802		1110
803	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;
804	case REQ_CLOSE: req->result = close (req->fd); break;	1112	case REQ_CLOSE: req->result = close (req->int1); break;
805	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1113	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
806	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1114	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
807	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1115	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
808	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1116	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
809	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;
810		1120
811	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1121	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
812	case REQ_FSYNC: req->result = fsync (req->fd); break;	1122	case REQ_FSYNC: req->result = fsync (req->int1); break;
813	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1123	case REQ_READDIR: scandir_ (req, self); break;
814		1124
815	case REQ_SLEEP:	1125	case REQ_BUSY:
816	{	1126	{
817	struct timeval tv;	1127	struct timeval tv;
818		1128
819	tv.tv_sec = req->fd;	1129	tv.tv_sec = req->int1;
820	tv.tv_usec = req->fd2;	1130	tv.tv_usec = req->int2;
821		1131
822	req->result = select (0, 0, 0, 0, &tv);	1132	req->result = select (0, 0, 0, 0, &tv);
823	}	1133	}
824		1134
		1135	case REQ_GROUP:
		1136	case REQ_NOP:
		1137	break;
		1138
825	case REQ_QUIT:	1139	case REQ_QUIT:
826	break;	1140	goto quit;
827		1141
828	default:	1142	default:
829	req->result = ENOSYS;	1143	req->result = ENOSYS;
830	break;	1144	break;
831	}	1145	}
832		1146
833	req->errorno = errno;	1147	req->errorno = errno;
834		1148
835	pthread_mutex_lock (&reslock);	1149	LOCK (reslock);
836		1150
837	req->next = 0;	1151	++npending;
838		1152
839	if (rese)	1153	if (!reqq_push (&res_queue, req))
840	{
841	rese->next = req;
842	rese = req;
843	}
844	else
845	{
846	rese = ress = req;
847
848	/* write a dummy byte to the pipe so fh becomes ready */	1154	/* write a dummy byte to the pipe so fh becomes ready */
849	write (respipe [1], &respipe, 1);	1155	write (respipe [1], &respipe, 1);
850	}
851		1156
852	pthread_mutex_unlock (&reslock);	1157	self->req = 0;
		1158	worker_clear (self);
		1159
		1160	UNLOCK (reslock);
853	}	1161	}
854	while (type != REQ_QUIT);	1162
		1163	quit:
		1164	LOCK (wrklock);
		1165	worker_free (self);
		1166	UNLOCK (wrklock);
855		1167
856	return 0;	1168	return 0;
857	}	1169	}
858		1170
859	/*****************************************************************************/	1171	/*****************************************************************************/
860		1172
861	static void atfork_prepare (void)	1173	static void atfork_prepare (void)
862	{	1174	{
863	pthread_mutex_lock (&reqlock);	1175	LOCK (wrklock);
864	pthread_mutex_lock (&reslock);	1176	LOCK (reqlock);
		1177	LOCK (reslock);
865	#if !HAVE_PREADWRITE	1178	#if !HAVE_PREADWRITE
866	pthread_mutex_lock (&preadwritelock);	1179	LOCK (preadwritelock);
867	#endif	1180	#endif
868	#if !HAVE_READDIR_R	1181	#if !HAVE_READDIR_R
869	pthread_mutex_lock (&readdirlock);	1182	LOCK (readdirlock);
870	#endif	1183	#endif
871	}	1184	}
872		1185
873	static void atfork_parent (void)	1186	static void atfork_parent (void)
874	{	1187	{
875	#if !HAVE_READDIR_R	1188	#if !HAVE_READDIR_R
876	pthread_mutex_unlock (&readdirlock);	1189	UNLOCK (readdirlock);
877	#endif	1190	#endif
878	#if !HAVE_PREADWRITE	1191	#if !HAVE_PREADWRITE
879	pthread_mutex_unlock (&preadwritelock);	1192	UNLOCK (preadwritelock);
880	#endif	1193	#endif
881	pthread_mutex_unlock (&reslock);	1194	UNLOCK (reslock);
882	pthread_mutex_unlock (&reqlock);	1195	UNLOCK (reqlock);
		1196	UNLOCK (wrklock);
883	}	1197	}
884		1198
885	static void atfork_child (void)	1199	static void atfork_child (void)
886	{	1200	{
887	aio_req prv;	1201	aio_req prv;
888		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
889	started = 0;	1220	started = 0;
890		1221	idle = 0;
891	while (reqs)	1222	nreqs = 0;
892	{	1223	nready = 0;
893	prv = reqs;	1224	npending = 0;
894	reqs = prv->next;
895	req_free (prv);
896	}
897
898	reqs = reqe = 0;
899
900	while (ress)
901	{
902	prv = ress;
903	ress = prv->next;
904	req_free (prv);
905	}
906
907	ress = rese = 0;
908		1225
909	close (respipe [0]);	1226	close (respipe [0]);
910	close (respipe [1]);	1227	close (respipe [1]);
911	create_pipe ();	1228	create_pipe ();
912		1229
913	atfork_parent ();	1230	atfork_parent ();
914	}	1231	}
915		1232
916	#define dREQ \	1233	#define dREQ \
917	aio_req req; \	1234	aio_req req; \
		1235	int req_pri = next_pri; \
		1236	next_pri = DEFAULT_PRI + PRI_BIAS; \
918	\	1237	\
919	if (SvOK (callback) && !SvROK (callback)) \	1238	if (SvOK (callback) && !SvROK (callback)) \
920	croak ("callback must be undef or of reference type"); \	1239	croak ("callback must be undef or of reference type"); \
921	\	1240	\
922	Newz (0, req, 1, aio_cb); \	1241	Newz (0, req, 1, aio_cb); \
923	if (!req) \	1242	if (!req) \
924	croak ("out of memory during aio_req allocation"); \	1243	croak ("out of memory during aio_req allocation"); \
925	\	1244	\
926	req->callback = newSVsv (callback)	1245	req->callback = newSVsv (callback); \
		1246	req->pri = req_pri
927		1247
928	#define REQ_SEND \	1248	#define REQ_SEND \
929	req_send (req); \	1249	req_send (req); \
930	\	1250	\
931	if (GIMME_V != G_VOID) \	1251	if (GIMME_V != G_VOID) \
…		…
936	PROTOTYPES: ENABLE	1256	PROTOTYPES: ENABLE
937		1257
938	BOOT:	1258	BOOT:
939	{	1259	{
940	HV *stash = gv_stashpv ("IO::AIO", 1);	1260	HV *stash = gv_stashpv ("IO::AIO", 1);
		1261
941	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1262	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
942	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1263	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
943	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));
944		1268
945	create_pipe ();	1269	create_pipe ();
946	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1270	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
947	}	1271	}
948		1272
949	void	1273	void
950	min_parallel (nthreads)	1274	max_poll_reqs (int nreqs)
951	int nthreads
952	PROTOTYPE: $	1275	PROTOTYPE: $
		1276	CODE:
		1277	max_poll_reqs = nreqs;
953		1278
954	void	1279	void
955	max_parallel (nthreads)	1280	max_poll_time (double nseconds)
956	int nthreads
957	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);
958		1298
959	int	1299	int
960	max_outstanding (nreqs)	1300	max_outstanding (int maxreqs)
961	int nreqs	1301	PROTOTYPE: $
962	PROTOTYPE: $
963	CODE:	1302	CODE:
964	RETVAL = max_outstanding;	1303	RETVAL = max_outstanding;
965	max_outstanding = nreqs;	1304	max_outstanding = maxreqs;
		1305	OUTPUT:
		1306	RETVAL
966		1307
967	void	1308	void
968	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1309	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
969	SV * pathname	1310	SV * pathname
970	int flags	1311	int flags
…		…
974	PPCODE:	1315	PPCODE:
975	{	1316	{
976	dREQ;	1317	dREQ;
977		1318
978	req->type = REQ_OPEN;	1319	req->type = REQ_OPEN;
979	req->data = newSVsv (pathname);	1320	req->sv1 = newSVsv (pathname);
980	req->dataptr = SvPVbyte_nolen (req->data);	1321	req->ptr1 = SvPVbyte_nolen (pathname);
981	req->fd = flags;	1322	req->int1 = flags;
982	req->mode = mode;	1323	req->mode = mode;
983		1324
984	REQ_SEND;	1325	REQ_SEND;
985	}	1326	}
986		1327
…		…
996	PPCODE:	1337	PPCODE:
997	{	1338	{
998	dREQ;	1339	dREQ;
999		1340
1000	req->type = ix;	1341	req->type = ix;
1001	req->fh = newSVsv (fh);	1342	req->fh = newSVsv (fh);
1002	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1343	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1003		1344
1004	REQ_SEND (req);	1345	REQ_SEND (req);
1005	}	1346	}
1006		1347
1007	void	1348	void
…		…
1016	aio_read = REQ_READ	1357	aio_read = REQ_READ
1017	aio_write = REQ_WRITE	1358	aio_write = REQ_WRITE
1018	PROTOTYPE: $$$$$;$	1359	PROTOTYPE: $$$$$;$
1019	PPCODE:	1360	PPCODE:
1020	{	1361	{
1021	aio_req req;
1022	STRLEN svlen;	1362	STRLEN svlen;
1023	char *svptr = SvPVbyte (data, svlen);	1363	char *svptr = SvPVbyte (data, svlen);
1024		1364
1025	SvUPGRADE (data, SVt_PV);	1365	SvUPGRADE (data, SVt_PV);
1026	SvPOK_on (data);	1366	SvPOK_on (data);
…		…
1048		1388
1049	{	1389	{
1050	dREQ;	1390	dREQ;
1051		1391
1052	req->type = ix;	1392	req->type = ix;
1053	req->fh = newSVsv (fh);	1393	req->fh = newSVsv (fh);
1054	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1394	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1055	: IoOFP (sv_2io (fh)));	1395	: IoOFP (sv_2io (fh)));
1056	req->offset = offset;	1396	req->offs = offset;
1057	req->length = length;	1397	req->size = length;
1058	req->data = SvREFCNT_inc (data);	1398	req->sv1 = SvREFCNT_inc (data);
1059	req->dataptr = (char *)svptr + dataoffset;	1399	req->ptr1 = (char *)svptr + dataoffset;
		1400	req->stroffset = dataoffset;
1060		1401
1061	if (!SvREADONLY (data))	1402	if (!SvREADONLY (data))
1062	{	1403	{
1063	SvREADONLY_on (data);	1404	SvREADONLY_on (data);
1064	req->data2ptr = (void *)data;	1405	req->flags |= FLAG_DATA_RO_OFF;
1065	}	1406	}
1066		1407
1067	REQ_SEND;	1408	REQ_SEND;
1068	}	1409	}
		1410	}
		1411
		1412	void
		1413	aio_readlink (path,callback=&PL_sv_undef)
		1414	SV * path
		1415	SV * callback
		1416	PROTOTYPE: $$;$
		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;
1069	}	1432	}
1070		1433
1071	void	1434	void
1072	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)
1073	SV * out_fh	1436	SV * out_fh
…		…
1079	PPCODE:	1442	PPCODE:
1080	{	1443	{
1081	dREQ;	1444	dREQ;
1082		1445
1083	req->type = REQ_SENDFILE;	1446	req->type = REQ_SENDFILE;
1084	req->fh = newSVsv (out_fh);	1447	req->fh = newSVsv (out_fh);
1085	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1448	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1086	req->fh2 = newSVsv (in_fh);	1449	req->sv2 = newSVsv (in_fh);
1087	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1450	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1088	req->offset = in_offset;	1451	req->offs = in_offset;
1089	req->length = length;	1452	req->size = length;
1090		1453
1091	REQ_SEND;	1454	REQ_SEND;
1092	}	1455	}
1093		1456
1094	void	1457	void
…		…
1101	PPCODE:	1464	PPCODE:
1102	{	1465	{
1103	dREQ;	1466	dREQ;
1104		1467
1105	req->type = REQ_READAHEAD;	1468	req->type = REQ_READAHEAD;
1106	req->fh = newSVsv (fh);	1469	req->fh = newSVsv (fh);
1107	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1470	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1108	req->offset = offset;	1471	req->offs = offset;
1109	req->length = length;	1472	req->size = length;
1110		1473
1111	REQ_SEND;	1474	REQ_SEND;
1112	}	1475	}
1113		1476
1114	void	1477	void
…		…
1130	}	1493	}
1131		1494
1132	if (SvPOK (fh_or_path))	1495	if (SvPOK (fh_or_path))
1133	{	1496	{
1134	req->type = ix;	1497	req->type = ix;
1135	req->data = newSVsv (fh_or_path);	1498	req->sv1 = newSVsv (fh_or_path);
1136	req->dataptr = SvPVbyte_nolen (req->data);	1499	req->ptr1 = SvPVbyte_nolen (fh_or_path);
1137	}	1500	}
1138	else	1501	else
1139	{	1502	{
1140	req->type = REQ_FSTAT;	1503	req->type = REQ_FSTAT;
1141	req->fh = newSVsv (fh_or_path);	1504	req->fh = newSVsv (fh_or_path);
1142	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1505	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1143	}	1506	}
1144		1507
1145	REQ_SEND;	1508	REQ_SEND;
1146	}	1509	}
1147		1510
1148	void	1511	void
1149	aio_unlink (pathname,callback=&PL_sv_undef)	1512	aio_unlink (pathname,callback=&PL_sv_undef)
1150	SV * pathname	1513	SV * pathname
1151	SV * callback	1514	SV * callback
1152	ALIAS:	1515	ALIAS:
1153	aio_unlink = REQ_UNLINK	1516	aio_unlink = REQ_UNLINK
1154	aio_rmdir = REQ_RMDIR	1517	aio_rmdir = REQ_RMDIR
1155	aio_readdir = REQ_READDIR	1518	aio_readdir = REQ_READDIR
1156	PPCODE:	1519	PPCODE:
1157	{	1520	{
1158	dREQ;	1521	dREQ;
1159		1522
1160	req->type = ix;	1523	req->type = ix;
1161	req->data = newSVsv (pathname);	1524	req->sv1 = newSVsv (pathname);
1162	req->dataptr = SvPVbyte_nolen (req->data);	1525	req->ptr1 = SvPVbyte_nolen (pathname);
1163		1526
1164	REQ_SEND;	1527	REQ_SEND;
1165	}	1528	}
1166		1529
1167	void	1530	void
1168	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1531	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1169	SV * oldpath	1532	SV * oldpath
1170	SV * newpath	1533	SV * newpath
1171	SV * callback	1534	SV * callback
1172	ALIAS:	1535	ALIAS:
1173	aio_link = REQ_LINK	1536	aio_link = REQ_LINK
1174	aio_symlink = REQ_SYMLINK	1537	aio_symlink = REQ_SYMLINK
1175	aio_rename = REQ_RENAME	1538	aio_rename = REQ_RENAME
1176	PPCODE:	1539	PPCODE:
1177	{	1540	{
1178	dREQ;	1541	dREQ;
1179		1542
1180	req->type = ix;	1543	req->type = ix;
1181	req->fh = newSVsv (oldpath);	1544	req->fh = newSVsv (oldpath);
1182	req->data2ptr = SvPVbyte_nolen (req->fh);	1545	req->ptr2 = SvPVbyte_nolen (req->fh);
1183	req->data = newSVsv (newpath);	1546	req->sv1 = newSVsv (newpath);
1184	req->dataptr = SvPVbyte_nolen (req->data);	1547	req->ptr1 = SvPVbyte_nolen (newpath);
1185		1548
1186	REQ_SEND;	1549	REQ_SEND;
1187	}	1550	}
1188		1551
1189	void	1552	void
1190	aio_sleep (delay,callback=&PL_sv_undef)	1553	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1191	double delay	1554	SV * pathname
1192	SV * callback	1555	SV * callback
		1556	UV mode
		1557	UV dev
1193	PPCODE:	1558	PPCODE:
1194	{	1559	{
1195	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	}
1196		1570
		1571	void
		1572	aio_busy (delay,callback=&PL_sv_undef)
		1573	double delay
		1574	SV * callback
		1575	PPCODE:
		1576	{
		1577	dREQ;
		1578
1197	req->type = REQ_SLEEP;	1579	req->type = REQ_BUSY;
1198	req->fd = delay < 0. ? 0 : delay;	1580	req->int1 = delay < 0. ? 0 : delay;
1199	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1581	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1200		1582
1201	REQ_SEND;	1583	REQ_SEND;
1202	}	1584	}
1203		1585
1204	void	1586	void
…		…
1206	SV * callback	1588	SV * callback
1207	PROTOTYPE: ;$	1589	PROTOTYPE: ;$
1208	PPCODE:	1590	PPCODE:
1209	{	1591	{
1210	dREQ;	1592	dREQ;
		1593
1211	req->type = REQ_GROUP;	1594	req->type = REQ_GROUP;
		1595
1212	req_send (req);	1596	req_send (req);
1213	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1597	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1214	}	1598	}
		1599
		1600	void
		1601	aio_nop (callback=&PL_sv_undef)
		1602	SV * callback
		1603	PPCODE:
		1604	{
		1605	dREQ;
		1606
		1607	req->type = REQ_NOP;
		1608
		1609	REQ_SEND;
		1610	}
		1611
		1612	int
		1613	aioreq_pri (int pri = 0)
		1614	PROTOTYPE: ;$
		1615	CODE:
		1616	RETVAL = next_pri - PRI_BIAS;
		1617	if (items > 0)
		1618	{
		1619	if (pri < PRI_MIN) pri = PRI_MIN;
		1620	if (pri > PRI_MAX) pri = PRI_MAX;
		1621	next_pri = pri + PRI_BIAS;
		1622	}
		1623	OUTPUT:
		1624	RETVAL
		1625
		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;
1215		1633
1216	void	1634	void
1217	flush ()	1635	flush ()
1218	PROTOTYPE:	1636	PROTOTYPE:
1219	CODE:	1637	CODE:
1220	while (nreqs)	1638	while (nreqs)
1221	{	1639	{
1222	poll_wait ();	1640	poll_wait ();
1223	poll_cb ();	1641	poll_cb (0);
1224	}	1642	}
1225		1643
1226	void	1644	void
1227	poll()	1645	poll()
1228	PROTOTYPE:	1646	PROTOTYPE:
1229	CODE:	1647	CODE:
1230	if (nreqs)	1648	if (nreqs)
1231	{	1649	{
1232	poll_wait ();	1650	poll_wait ();
1233	poll_cb ();	1651	poll_cb (0);
1234	}	1652	}
1235		1653
1236	int	1654	int
1237	poll_fileno()	1655	poll_fileno()
1238	PROTOTYPE:	1656	PROTOTYPE:
…		…
1262	CODE:	1680	CODE:
1263	RETVAL = nreqs;	1681	RETVAL = nreqs;
1264	OUTPUT:	1682	OUTPUT:
1265	RETVAL	1683	RETVAL
1266		1684
1267	PROTOTYPES: DISABLE	1685	int
1268		1686	nready()
1269	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1270
1271	void
1272	cancel (aio_req_ornot req)
1273	PROTOTYPE:	1687	PROTOTYPE:
1274	CODE:	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
		1711	PROTOTYPES: DISABLE
		1712
		1713	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1714
		1715	void
		1716	cancel (aio_req_ornot req)
		1717	CODE:
1275	req_cancel (req);	1718	req_cancel (req);
		1719
		1720	void
		1721	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1722	CODE:
		1723	SvREFCNT_dec (req->callback);
		1724	req->callback = newSVsv (callback);
1276		1725
1277	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1726	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1278		1727
1279	void	1728	void
1280	add (aio_req grp, ...)	1729	add (aio_req grp, ...)
1281	PPCODE:	1730	PPCODE:
1282	{	1731	{
1283	int i;	1732	int i;
1284	aio_req req;	1733	aio_req req;
1285		1734
1286	if (grp->fd == 2)	1735	if (grp->int1 == 2)
1287	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");
1288		1737
1289	for (i = 1; i < items; ++i )	1738	for (i = 1; i < items; ++i )
1290	{	1739	{
1291	if (GIMME_V != G_VOID)	1740	if (GIMME_V != G_VOID)
…		…
1293		1742
1294	req = SvAIO_REQ (ST (i));	1743	req = SvAIO_REQ (ST (i));
1295		1744
1296	if (req)	1745	if (req)
1297	{	1746	{
1298	++grp->length;	1747	++grp->size;
1299	req->grp = grp;	1748	req->grp = grp;
1300		1749
1301	req->grp_prev = 0;	1750	req->grp_prev = 0;
1302	req->grp_next = grp->grp_first;	1751	req->grp_next = grp->grp_first;
1303		1752
…		…
1308	}	1757	}
1309	}	1758	}
1310	}	1759	}
1311		1760
1312	void	1761	void
		1762	cancel_subs (aio_req_ornot req)
		1763	CODE:
		1764	req_cancel_subs (req);
		1765
		1766	void
1313	result (aio_req grp, ...)	1767	result (aio_req grp, ...)
1314	CODE:	1768	CODE:
1315	{	1769	{
1316	int i;	1770	int i;
		1771	AV *av;
		1772
		1773	grp->errorno = errno;
		1774
1317	AV *av = newAV ();	1775	av = newAV ();
1318		1776
1319	for (i = 1; i < items; ++i )	1777	for (i = 1; i < items; ++i )
1320	av_push (av, newSVsv (ST (i)));	1778	av_push (av, newSVsv (ST (i)));
1321		1779
1322	SvREFCNT_dec (grp->data);	1780	SvREFCNT_dec (grp->sv1);
1323	grp->data = (SV *)av;	1781	grp->sv1 = (SV *)av;
1324	}	1782	}
1325		1783
1326	void	1784	void
1327	lock (aio_req grp)	1785	errno (aio_req grp, int errorno = errno)
		1786	CODE:
		1787	grp->errorno = errorno;
		1788
		1789	void
		1790	limit (aio_req grp, int limit)
1328	CODE:	1791	CODE:
1329	++grp->length;	1792	grp->int2 = limit;
		1793	aio_grp_feed (grp);
1330		1794
1331	void	1795	void
1332	unlock (aio_req grp)	1796	feed (aio_req grp, SV *callback=&PL_sv_undef)
1333	CODE:	1797	CODE:
1334	aio_grp_dec (grp);	1798	{
		1799	SvREFCNT_dec (grp->sv2);
		1800	grp->sv2 = newSVsv (callback);
1335		1801
1336	void	1802	if (grp->int2 <= 0)
1337	feeder_limit (aio_req grp, int limit)	1803	grp->int2 = 2;
1338	CODE:	1804
1339	grp->fd2 = limit;
1340	aio_grp_feed (grp);	1805	aio_grp_feed (grp);
1341
1342	void
1343	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)
1344	CODE:
1345	{
1346	SvREFCNT_dec (grp->fh2);
1347	grp->fh2 = newSVsv (callback);
1348
1349	if (grp->fd2 <= 0)
1350	grp->fd2 = 2;
1351
1352	aio_grp_feed (grp);
1353	}	1806	}
1354		1807

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