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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.77 by root, Thu Oct 26 13:25:40 2006 UTC vs.
Revision 1.100 by root, Fri Jun 1 06:00:40 2007 UTC

1	/* solaris */	1	#include "xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "autoconf/config.h"
18		10
19	#include <pthread.h>
20
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>	14	#include <sys/time.h>
24	#include <sys/select.h>	15	#include <sys/select.h>
25	#include <sys/types.h>	16	#include <sys/types.h>
26	#include <sys/stat.h>	17	#include <sys/stat.h>
27	#include <limits.h>	18	#include <limits.h>
28	#include <unistd.h>	19	#include <unistd.h>
29	#include <fcntl.h>	20	#include <fcntl.h>
30	#include <signal.h>	21	#include <signal.h>
31	#include <sched.h>	22	#include <sched.h>
		23	#include <utime.h>
32		24
33	#if HAVE_SENDFILE	25	#if HAVE_SENDFILE
34	# if __linux	26	# if __linux
35	# include <sys/sendfile.h>	27	# include <sys/sendfile.h>
36	# elif __freebsd	28	# elif __freebsd
…		…
43	# else	35	# else
44	# error sendfile support requested but not available	36	# error sendfile support requested but not available
45	# endif	37	# endif
46	#endif	38	#endif
47		39
		40	/* number of seconds after which idle threads exit */
		41	#define IDLE_TIMEOUT 10
		42
48	/* used for struct dirent, AIX doesn't provide it */	43	/* used for struct dirent, AIX doesn't provide it */
49	#ifndef NAME_MAX	44	#ifndef NAME_MAX
50	# define NAME_MAX 4096	45	# define NAME_MAX 4096
51	#endif
52
53	#ifndef PTHREAD_STACK_MIN
54	/* care for broken platforms, e.g. windows */
55	# define PTHREAD_STACK_MIN 16384
56	#endif
57
58	#if __ia64
59	# define STACKSIZE 65536
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61	# define STACKSIZE PTHREAD_STACK_MIN
62	#else
63	# define STACKSIZE 16384
64	#endif	46	#endif
65		47
66	/* buffer size for various temporary buffers */	48	/* buffer size for various temporary buffers */
67	#define AIO_BUFSIZE 65536	49	#define AIO_BUFSIZE 65536
68		50
…		…
72	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	54	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
73	UNLOCK (wrklock); \	55	UNLOCK (wrklock); \
74	if (!aio_buf) \	56	if (!aio_buf) \
75	return -1;	57	return -1;
76		58
		59	typedef SV SV8; /* byte-sv, used for argument-checking */
		60
77	enum {	61	enum {
78	REQ_QUIT,	62	REQ_QUIT,
79	REQ_OPEN, REQ_CLOSE,	63	REQ_OPEN, REQ_CLOSE,
80	REQ_READ, REQ_WRITE, REQ_READAHEAD,	64	REQ_READ, REQ_WRITE, REQ_READAHEAD,
81	REQ_SENDFILE,	65	REQ_SENDFILE,
82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	66	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
		67	REQ_UTIME, REQ_FUTIME, /* must be consecutive */
		68	REQ_CHMOD, REQ_FCHMOD, /* must be consecutive */
		69	REQ_CHOWN, REQ_FCHOWN, /* must be consecutive */
83	REQ_FSYNC, REQ_FDATASYNC,	70	REQ_FSYNC, REQ_FDATASYNC,
84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	71	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
85	REQ_READDIR,	72	REQ_MKNOD, REQ_READDIR,
86	REQ_LINK, REQ_SYMLINK,	73	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
87	REQ_GROUP, REQ_NOP,	74	REQ_GROUP, REQ_NOP,
88	REQ_BUSY,	75	REQ_BUSY,
89	};	76	};
90		77
91	#define AIO_REQ_KLASS "IO::AIO::REQ"	78	#define AIO_REQ_KLASS "IO::AIO::REQ"
…		…
93		80
94	typedef struct aio_cb	81	typedef struct aio_cb
95	{	82	{
96	struct aio_cb *volatile next;	83	struct aio_cb *volatile next;
97		84
98	SV *data, *callback;	85	SV *callback;
99	SV *fh, *fh2;	86	SV *sv1, *sv2;
100	void *dataptr, *data2ptr;	87	void *ptr1, *ptr2;
101	Stat_t *statdata;
102	off_t offset;	88	off_t offs;
103	size_t length;	89	size_t size;
104	ssize_t result;	90	ssize_t result;
		91	double nv1, nv2;
105		92
106	STRLEN dataoffset;	93	STRLEN stroffset;
107	int type;	94	int type;
108	int fd, fd2;	95	int int1, int2, int3;
109	int errorno;	96	int errorno;
110	mode_t mode; /* open */	97	mode_t mode; /* open */
111		98
112	unsigned char flags;	99	unsigned char flags;
113	unsigned char pri;	100	unsigned char pri;
…		…
115	SV *self; /* the perl counterpart of this request, if any */	102	SV *self; /* the perl counterpart of this request, if any */
116	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	103	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
117	} aio_cb;	104	} aio_cb;
118		105
119	enum {	106	enum {
120	FLAG_CANCELLED = 0x01,	107	FLAG_CANCELLED = 0x01, /* request was cancelled */
		108	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		109	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
121	};	110	};
122		111
123	typedef aio_cb *aio_req;	112	typedef aio_cb *aio_req;
124	typedef aio_cb *aio_req_ornot;	113	typedef aio_cb *aio_req_ornot;
125		114
…		…
130	DEFAULT_PRI = 0,	119	DEFAULT_PRI = 0,
131	PRI_BIAS = -PRI_MIN,	120	PRI_BIAS = -PRI_MIN,
132	NUM_PRI = PRI_MAX + PRI_BIAS + 1,	121	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
133	};	122	};
134		123
		124	#define AIO_TICKS ((1000000 + 1023) >> 10)
		125
		126	static unsigned int max_poll_time = 0;
		127	static unsigned int max_poll_reqs = 0;
		128
		129	/* calculcate time difference in ~1/AIO_TICKS of a second */
		130	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		131	{
		132	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		133	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		134	}
		135
		136	static thread_t main_tid;
		137	static int main_sig;
		138	static int block_sig_level;
		139
		140	void block_sig ()
		141	{
		142	sigset_t ss;
		143
		144	if (block_sig_level++)
		145	return;
		146
		147	if (!main_sig)
		148	return;
		149
		150	sigemptyset (&ss);
		151	sigaddset (&ss, main_sig);
		152	pthread_sigmask (SIG_BLOCK, &ss, 0);
		153	}
		154
		155	void unblock_sig ()
		156	{
		157	sigset_t ss;
		158
		159	if (--block_sig_level)
		160	return;
		161
		162	if (!main_sig)
		163	return;
		164
		165	sigemptyset (&ss);
		166	sigaddset (&ss, main_sig);
		167	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		168	}
		169
135	static int next_pri = DEFAULT_PRI + PRI_BIAS;	170	static int next_pri = DEFAULT_PRI + PRI_BIAS;
136		171
137	static int started, wanted;	172	static unsigned int started, idle, wanted;
138	static volatile int nreqs;
139	static int respipe [2];
140
141	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
142	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
143	#else
144	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
145	#endif
146
147	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
148	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
149		173
150	/* worker threads management */	174	/* worker threads management */
151	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;	175	static mutex_t wrklock = MUTEX_INIT;
152		176
153	typedef struct worker {	177	typedef struct worker {
154	/* locked by wrklock */	178	/* locked by wrklock */
155	struct worker *prev, *next;	179	struct worker *prev, *next;
156		180
157	pthread_t tid;	181	thread_t tid;
158		182
159	/* locked by reslock, reqlock or wrklock */	183	/* locked by reslock, reqlock or wrklock */
160	aio_req req; /* currently processed request */	184	aio_req req; /* currently processed request */
161	void *dbuf;	185	void *dbuf;
162	DIR *dirp;	186	DIR *dirp;
…		…
185	wrk->prev->next = wrk->next;	209	wrk->prev->next = wrk->next;
186		210
187	free (wrk);	211	free (wrk);
188	}	212	}
189		213
		214	static volatile unsigned int nreqs, nready, npending;
		215	static volatile unsigned int max_idle = 4;
		216	static volatile unsigned int max_outstanding = 0xffffffff;
		217	static int respipe [2];
		218
190	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	219	static mutex_t reslock = MUTEX_INIT;
191	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;	220	static mutex_t reqlock = MUTEX_INIT;
192	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	221	static cond_t reqwait = COND_INIT;
		222
		223	#if WORDACCESS_UNSAFE
		224
		225	static unsigned int get_nready ()
		226	{
		227	unsigned int retval;
		228
		229	LOCK (reqlock);
		230	retval = nready;
		231	UNLOCK (reqlock);
		232
		233	return retval;
		234	}
		235
		236	static unsigned int get_npending ()
		237	{
		238	unsigned int retval;
		239
		240	LOCK (reslock);
		241	retval = npending;
		242	UNLOCK (reslock);
		243
		244	return retval;
		245	}
		246
		247	static unsigned int get_nthreads ()
		248	{
		249	unsigned int retval;
		250
		251	LOCK (wrklock);
		252	retval = started;
		253	UNLOCK (wrklock);
		254
		255	return retval;
		256	}
		257
		258	#else
		259
		260	# define get_nready() nready
		261	# define get_npending() npending
		262	# define get_nthreads() started
		263
		264	#endif
193		265
194	/*	266	/*
195	* a somewhat faster data structure might be nice, but	267	* a somewhat faster data structure might be nice, but
196	* with 8 priorities this actually needs <20 insns	268	* with 8 priorities this actually needs <20 insns
197	* per shift, the most expensive operation.	269	* per shift, the most expensive operation.
…		…
243	}	315	}
244		316
245	abort ();	317	abort ();
246	}	318	}
247		319
248	static int poll_cb (int max);	320	static int poll_cb ();
249	static void req_invoke (aio_req req);	321	static int req_invoke (aio_req req);
250	static void req_free (aio_req req);	322	static void req_free (aio_req req);
251	static void req_cancel (aio_req req);	323	static void req_cancel (aio_req req);
252		324
253	/* must be called at most once */	325	/* must be called at most once */
254	static SV *req_sv (aio_req req, const char *klass)	326	static SV *req_sv (aio_req req, const char *klass)
…		…
274	return mg ? (aio_req)mg->mg_ptr : 0;	346	return mg ? (aio_req)mg->mg_ptr : 0;
275	}	347	}
276		348
277	static void aio_grp_feed (aio_req grp)	349	static void aio_grp_feed (aio_req grp)
278	{	350	{
		351	block_sig ();
		352
279	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	353	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
280	{	354	{
281	int old_len = grp->length;	355	int old_len = grp->size;
282		356
283	if (grp->fh2 && SvOK (grp->fh2))	357	if (grp->sv2 && SvOK (grp->sv2))
284	{	358	{
285	dSP;	359	dSP;
286		360
287	ENTER;	361	ENTER;
288	SAVETMPS;	362	SAVETMPS;
289	PUSHMARK (SP);	363	PUSHMARK (SP);
290	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	364	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
291	PUTBACK;	365	PUTBACK;
292	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	366	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
293	SPAGAIN;	367	SPAGAIN;
294	FREETMPS;	368	FREETMPS;
295	LEAVE;	369	LEAVE;
296	}	370	}
297		371
298	/* stop if no progress has been made */	372	/* stop if no progress has been made */
299	if (old_len == grp->length)	373	if (old_len == grp->size)
300	{	374	{
301	SvREFCNT_dec (grp->fh2);	375	SvREFCNT_dec (grp->sv2);
302	grp->fh2 = 0;	376	grp->sv2 = 0;
303	break;	377	break;
304	}	378	}
305	}	379	}
		380
		381	unblock_sig ();
306	}	382	}
307		383
308	static void aio_grp_dec (aio_req grp)	384	static void aio_grp_dec (aio_req grp)
309	{	385	{
310	--grp->length;	386	--grp->size;
311		387
312	/* call feeder, if applicable */	388	/* call feeder, if applicable */
313	aio_grp_feed (grp);	389	aio_grp_feed (grp);
314		390
315	/* finish, if done */	391	/* finish, if done */
316	if (!grp->length && grp->fd)	392	if (!grp->size && grp->int1)
317	{	393	{
		394	block_sig ();
		395
318	req_invoke (grp);	396	if (!req_invoke (grp))
		397	{
		398	req_free (grp);
		399	unblock_sig ();
		400	croak (0);
		401	}
		402
319	req_free (grp);	403	req_free (grp);
		404	unblock_sig ();
320	}	405	}
321	}	406	}
322		407
323	static void poll_wait ()
324	{
325	fd_set rfd;
326
327	while (nreqs)
328	{
329	int size;
330	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
331	LOCK (reslock);
332	#endif
333	size = res_queue.size;
334	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
335	UNLOCK (reslock);
336	#endif
337
338	if (size)
339	return;
340
341	FD_ZERO(&rfd);
342	FD_SET(respipe [0], &rfd);
343
344	select (respipe [0] + 1, &rfd, 0, 0, 0);
345	}
346	}
347
348	static void req_invoke (aio_req req)	408	static int req_invoke (aio_req req)
349	{	409	{
350	dSP;	410	dSP;
		411
		412	if (req->flags & FLAG_SV2_RO_OFF)
		413	SvREADONLY_off (req->sv2);
351		414
352	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	415	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
353	{	416	{
354	errno = req->errorno;
355
356	ENTER;	417	ENTER;
357	SAVETMPS;	418	SAVETMPS;
358	PUSHMARK (SP);	419	PUSHMARK (SP);
359	EXTEND (SP, 1);	420	EXTEND (SP, 1);
360		421
…		…
365	SV *rv = &PL_sv_undef;	426	SV *rv = &PL_sv_undef;
366		427
367	if (req->result >= 0)	428	if (req->result >= 0)
368	{	429	{
369	int i;	430	int i;
370	char *buf = req->data2ptr;	431	char *buf = req->ptr2;
371	AV *av = newAV ();	432	AV *av = newAV ();
372		433
373	av_extend (av, req->result - 1);	434	av_extend (av, req->result - 1);
374		435
375	for (i = 0; i < req->result; ++i)	436	for (i = 0; i < req->result; ++i)
…		…
395	PUSHs (sv_2mortal (newSViv (req->result)));	456	PUSHs (sv_2mortal (newSViv (req->result)));
396	PUTBACK;	457	PUTBACK;
397	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	458	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
398	SPAGAIN;	459	SPAGAIN;
399		460
400	fh = SvREFCNT_inc (POPs);	461	fh = POPs;
401
402	PUSHMARK (SP);	462	PUSHMARK (SP);
403	XPUSHs (sv_2mortal (fh));	463	XPUSHs (fh);
404	}	464	}
405	break;	465	break;
406		466
407	case REQ_GROUP:	467	case REQ_GROUP:
408	req->fd = 2; /* mark group as finished */	468	req->int1 = 2; /* mark group as finished */
409		469
410	if (req->data)	470	if (req->sv1)
411	{	471	{
412	int i;	472	int i;
413	AV *av = (AV *)req->data;	473	AV *av = (AV *)req->sv1;
414		474
415	EXTEND (SP, AvFILL (av) + 1);	475	EXTEND (SP, AvFILL (av) + 1);
416	for (i = 0; i <= AvFILL (av); ++i)	476	for (i = 0; i <= AvFILL (av); ++i)
417	PUSHs (*av_fetch (av, i, 0));	477	PUSHs (*av_fetch (av, i, 0));
418	}	478	}
…		…
420		480
421	case REQ_NOP:	481	case REQ_NOP:
422	case REQ_BUSY:	482	case REQ_BUSY:
423	break;	483	break;
424		484
		485	case REQ_READLINK:
		486	if (req->result > 0)
		487	{
		488	SvCUR_set (req->sv2, req->result);
		489	*SvEND (req->sv2) = 0;
		490	PUSHs (req->sv2);
		491	}
		492	break;
		493
		494	case REQ_STAT:
		495	case REQ_LSTAT:
		496	case REQ_FSTAT:
		497	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		498	PL_laststatval = req->result;
		499	PL_statcache = *(Stat_t *)(req->ptr2);
		500	PUSHs (sv_2mortal (newSViv (req->result)));
		501	break;
		502
		503	case REQ_READ:
		504	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		505	*SvEND (req->sv2) = 0;
		506	PUSHs (sv_2mortal (newSViv (req->result)));
		507	break;
		508
425	default:	509	default:
426	PUSHs (sv_2mortal (newSViv (req->result)));	510	PUSHs (sv_2mortal (newSViv (req->result)));
427	break;	511	break;
428	}	512	}
429		513
		514	errno = req->errorno;
430		515
431	PUTBACK;	516	PUTBACK;
432	call_sv (req->callback, G_VOID | G_EVAL);	517	call_sv (req->callback, G_VOID | G_EVAL);
433	SPAGAIN;	518	SPAGAIN;
434		519
…		…
448	grp->grp_first = req->grp_next;	533	grp->grp_first = req->grp_next;
449		534
450	aio_grp_dec (grp);	535	aio_grp_dec (grp);
451	}	536	}
452		537
453	if (SvTRUE (ERRSV))	538	return !SvTRUE (ERRSV);
454	{
455	req_free (req);
456	croak (0);
457	}
458	}	539	}
459		540
460	static void req_free (aio_req req)	541	static void req_free (aio_req req)
461	{	542	{
462	if (req->self)	543	if (req->self)
463	{	544	{
464	sv_unmagic (req->self, PERL_MAGIC_ext);	545	sv_unmagic (req->self, PERL_MAGIC_ext);
465	SvREFCNT_dec (req->self);	546	SvREFCNT_dec (req->self);
466	}	547	}
467		548
468	SvREFCNT_dec (req->data);
469	SvREFCNT_dec (req->fh);	549	SvREFCNT_dec (req->sv1);
470	SvREFCNT_dec (req->fh2);	550	SvREFCNT_dec (req->sv2);
471	SvREFCNT_dec (req->callback);	551	SvREFCNT_dec (req->callback);
472	Safefree (req->statdata);
473		552
474	if (req->type == REQ_READDIR)	553	if (req->flags & FLAG_PTR2_FREE)
475	free (req->data2ptr);	554	free (req->ptr2);
476		555
477	Safefree (req);	556	Safefree (req);
478	}	557	}
479		558
480	static void req_cancel_subs (aio_req grp)	559	static void req_cancel_subs (aio_req grp)
…		…
482	aio_req sub;	561	aio_req sub;
483		562
484	if (grp->type != REQ_GROUP)	563	if (grp->type != REQ_GROUP)
485	return;	564	return;
486		565
487	SvREFCNT_dec (grp->fh2);	566	SvREFCNT_dec (grp->sv2);
488	grp->fh2 = 0;	567	grp->sv2 = 0;
489		568
490	for (sub = grp->grp_first; sub; sub = sub->grp_next)	569	for (sub = grp->grp_first; sub; sub = sub->grp_next)
491	req_cancel (sub);	570	req_cancel (sub);
492	}	571	}
493		572
…		…
496	req->flags |= FLAG_CANCELLED;	575	req->flags |= FLAG_CANCELLED;
497		576
498	req_cancel_subs (req);	577	req_cancel_subs (req);
499	}	578	}
500		579
501	static int poll_cb (int max)
502	{
503	dSP;
504	int count = 0;
505	int do_croak = 0;
506	aio_req req;
507
508	while (max <= 0 || count < max)
509	{
510	LOCK (reslock);
511	req = reqq_shift (&res_queue);
512
513	if (req)
514	{
515	if (!res_queue.size)
516	{
517	/* read any signals sent by the worker threads */
518	char buf [32];
519	while (read (respipe [0], buf, 32) == 32)
520	;
521	}
522	}
523
524	UNLOCK (reslock);
525
526	if (!req)
527	break;
528
529	--nreqs;
530
531	if (req->type == REQ_QUIT)
532	started--;
533	else if (req->type == REQ_GROUP && req->length)
534	{
535	req->fd = 1; /* mark request as delayed */
536	continue;
537	}
538	else
539	{
540	if (req->type == REQ_READ)
541	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
542
543	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
544	SvREADONLY_off (req->data);
545
546	if (req->statdata)
547	{
548	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
549	PL_laststatval = req->result;
550	PL_statcache = *(req->statdata);
551	}
552
553	req_invoke (req);
554
555	count++;
556	}
557
558	req_free (req);
559	}
560
561	return count;
562	}
563
564	static void *aio_proc(void *arg);	580	static void *aio_proc(void *arg);
565		581
566	static void start_thread (void)	582	static void start_thread (void)
567	{	583	{
568	sigset_t fullsigset, oldsigset;
569	pthread_attr_t attr;
570
571	worker *wrk = calloc (1, sizeof (worker));	584	worker *wrk = calloc (1, sizeof (worker));
572		585
573	if (!wrk)	586	if (!wrk)
574	croak ("unable to allocate worker thread data");	587	croak ("unable to allocate worker thread data");
575		588
576	pthread_attr_init (&attr);
577	pthread_attr_setstacksize (&attr, STACKSIZE);
578	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
579
580	sigfillset (&fullsigset);
581
582	LOCK (wrklock);	589	LOCK (wrklock);
583	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
584		590
585	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)	591	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
586	{	592	{
587	wrk->prev = &wrk_first;	593	wrk->prev = &wrk_first;
588	wrk->next = wrk_first.next;	594	wrk->next = wrk_first.next;
589	wrk_first.next->prev = wrk;	595	wrk_first.next->prev = wrk;
590	wrk_first.next = wrk;	596	wrk_first.next = wrk;
591	started++;	597	++started;
592	}	598	}
593	else	599	else
594	free (wrk);	600	free (wrk);
595		601
596	sigprocmask (SIG_SETMASK, &oldsigset, 0);
597	UNLOCK (wrklock);	602	UNLOCK (wrklock);
598	}	603	}
599		604
		605	static void maybe_start_thread ()
		606	{
		607	if (get_nthreads () >= wanted)
		608	return;
		609
		610	/* todo: maybe use idle here, but might be less exact */
		611	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		612	return;
		613
		614	start_thread ();
		615	}
		616
600	static void req_send (aio_req req)	617	static void req_send (aio_req req)
601	{	618	{
602	while (started < wanted && nreqs >= started)	619	block_sig ();
603	start_thread ();
604		620
605	++nreqs;	621	++nreqs;
		622
		623	LOCK (reqlock);
		624	++nready;
		625	reqq_push (&req_queue, req);
		626	COND_SIGNAL (reqwait);
		627	UNLOCK (reqlock);
		628
		629	unblock_sig ();
		630
		631	maybe_start_thread ();
		632	}
		633
		634	static void end_thread (void)
		635	{
		636	aio_req req;
		637
		638	Newz (0, req, 1, aio_cb);
		639
		640	req->type = REQ_QUIT;
		641	req->pri = PRI_MAX + PRI_BIAS;
606		642
607	LOCK (reqlock);	643	LOCK (reqlock);
608	reqq_push (&req_queue, req);	644	reqq_push (&req_queue, req);
609	pthread_cond_signal (&reqwait);	645	COND_SIGNAL (reqwait);
610	UNLOCK (reqlock);	646	UNLOCK (reqlock);
611	}
612		647
613	static void end_thread (void)	648	LOCK (wrklock);
614	{	649	--started;
615	aio_req req;	650	UNLOCK (wrklock);
		651	}
616		652
617	Newz (0, req, 1, aio_cb);	653	static void set_max_idle (int nthreads)
618		654	{
619	req->type = REQ_QUIT;	655	if (WORDACCESS_UNSAFE) LOCK (reqlock);
620	req->pri = PRI_MAX + PRI_BIAS;	656	max_idle = nthreads <= 0 ? 1 : nthreads;
621		657	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
622	req_send (req);
623	}	658	}
624		659
625	static void min_parallel (int nthreads)	660	static void min_parallel (int nthreads)
626	{	661	{
627	if (wanted < nthreads)	662	if (wanted < nthreads)
628	wanted = nthreads;	663	wanted = nthreads;
629	}	664	}
630		665
631	static void max_parallel (int nthreads)	666	static void max_parallel (int nthreads)
632	{	667	{
633	int cur = started;
634
635	if (wanted > nthreads)	668	if (wanted > nthreads)
636	wanted = nthreads;	669	wanted = nthreads;
637		670
638	while (cur > wanted)	671	while (started > wanted)
		672	end_thread ();
		673	}
		674
		675	static void poll_wait ()
		676	{
		677	fd_set rfd;
		678
		679	while (nreqs)
639	{	680	{
		681	int size;
		682	if (WORDACCESS_UNSAFE) LOCK (reslock);
		683	size = res_queue.size;
		684	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		685
		686	if (size)
		687	return;
		688
640	end_thread ();	689	maybe_start_thread ();
641	cur--;	690
		691	FD_ZERO(&rfd);
		692	FD_SET(respipe [0], &rfd);
		693
		694	select (respipe [0] + 1, &rfd, 0, 0, 0);
642	}	695	}
		696	}
643		697
644	while (started > wanted)	698	static int poll_cb ()
		699	{
		700	dSP;
		701	int count = 0;
		702	int maxreqs = max_poll_reqs;
		703	int do_croak = 0;
		704	struct timeval tv_start, tv_now;
		705	aio_req req;
		706
		707	if (max_poll_time)
		708	gettimeofday (&tv_start, 0);
		709
		710	block_sig ();
		711
		712	for (;;)
645	{	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 [4];
		729	while (read (respipe [0], buf, 4) == 4)
		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	if (!req_invoke (req))
		749	{
		750	req_free (req);
		751	unblock_sig ();
		752	croak (0);
		753	}
		754
		755	count++;
		756	}
		757
		758	req_free (req);
		759
		760	if (maxreqs && !--maxreqs)
		761	break;
		762
		763	if (max_poll_time)
		764	{
		765	gettimeofday (&tv_now, 0);
		766
		767	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		768	break;
		769	}
		770	}
		771
		772	if (nreqs <= max_outstanding)
		773	break;
		774
646	poll_wait ();	775	poll_wait ();
647	poll_cb (0);	776
		777	++maxreqs;
648	}	778	}
		779
		780	unblock_sig ();
		781	return count;
649	}	782	}
650		783
651	static void create_pipe ()	784	static void create_pipe ()
652	{	785	{
653	if (pipe (respipe))	786	if (pipe (respipe))
…		…
670	/*	803	/*
671	* make our pread/pwrite safe against themselves, but not against	804	* make our pread/pwrite safe against themselves, but not against
672	* normal read/write by using a mutex. slows down execution a lot,	805	* normal read/write by using a mutex. slows down execution a lot,
673	* but that's your problem, not mine.	806	* but that's your problem, not mine.
674	*/	807	*/
675	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	808	static mutex_t preadwritelock = MUTEX_INIT;
676		809
677	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)	810	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
678	{	811	{
679	ssize_t res;	812	ssize_t res;
680	off_t ooffset;	813	off_t ooffset;
…		…
703		836
704	return res;	837	return res;
705	}	838	}
706	#endif	839	#endif
707		840
		841	#ifndef HAVE_FUTIMES
		842
		843	# define utimes(path,times) aio_utimes (path, times)
		844	# define futimes(fd,times) aio_futimes (fd, times)
		845
		846	int aio_utimes (const char *filename, const struct timeval times[2])
		847	{
		848	if (times)
		849	{
		850	struct utimbuf buf;
		851
		852	buf.actime = times[0].tv_sec;
		853	buf.modtime = times[1].tv_sec;
		854
		855	return utime (filename, &buf);
		856	}
		857	else
		858	return utime (filename, 0);
		859	}
		860
		861	int aio_futimes (int fd, const struct timeval tv[2])
		862	{
		863	errno = ENOSYS;
		864	return -1;
		865	}
		866
		867	#endif
		868
708	#if !HAVE_FDATASYNC	869	#if !HAVE_FDATASYNC
709	# define fdatasync fsync	870	# define fdatasync fsync
710	#endif	871	#endif
711		872
712	#if !HAVE_READAHEAD	873	#if !HAVE_READAHEAD
…		…
731	#endif	892	#endif
732		893
733	#if !HAVE_READDIR_R	894	#if !HAVE_READDIR_R
734	# define readdir_r aio_readdir_r	895	# define readdir_r aio_readdir_r
735		896
736	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	897	static mutex_t readdirlock = MUTEX_INIT;
737		898
738	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	899	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
739	{	900	{
740	struct dirent *e;	901	struct dirent *e;
741	int errorno;	902	int errorno;
…		…
868	int memofs = 0;	1029	int memofs = 0;
869	int res = 0;	1030	int res = 0;
870	int errorno;	1031	int errorno;
871		1032
872	LOCK (wrklock);	1033	LOCK (wrklock);
873	self->dirp = dirp = opendir (req->dataptr);	1034	self->dirp = dirp = opendir (req->ptr1);
874	self->dbuf = u = malloc (sizeof (*u));	1035	self->dbuf = u = malloc (sizeof (*u));
		1036	req->flags |= FLAG_PTR2_FREE;
875	req->data2ptr = names = malloc (memlen);	1037	req->ptr2 = names = malloc (memlen);
876	UNLOCK (wrklock);	1038	UNLOCK (wrklock);
877		1039
878	if (dirp && u && names)	1040	if (dirp && u && names)
879	for (;;)	1041	for (;;)
880	{	1042	{
…		…
894		1056
895	while (memofs + len > memlen)	1057	while (memofs + len > memlen)
896	{	1058	{
897	memlen *= 2;	1059	memlen *= 2;
898	LOCK (wrklock);	1060	LOCK (wrklock);
899	req->data2ptr = names = realloc (names, memlen);	1061	req->ptr2 = names = realloc (names, memlen);
900	UNLOCK (wrklock);	1062	UNLOCK (wrklock);
901		1063
902	if (!names)	1064	if (!names)
903	break;	1065	break;
904	}	1066	}
…		…
917	/*****************************************************************************/	1079	/*****************************************************************************/
918		1080
919	static void *aio_proc (void *thr_arg)	1081	static void *aio_proc (void *thr_arg)
920	{	1082	{
921	aio_req req;	1083	aio_req req;
922	int type;	1084	struct timespec ts;
923	worker *self = (worker *)thr_arg;	1085	worker *self = (worker *)thr_arg;
924		1086
925	do	1087	/* try to distribute timeouts somewhat evenly */
		1088	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1089	* (1000000000UL / 1024UL);
		1090
		1091	for (;;)
926	{	1092	{
		1093	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1094
927	LOCK (reqlock);	1095	LOCK (reqlock);
928		1096
929	for (;;)	1097	for (;;)
930	{	1098	{
931	self->req = req = reqq_shift (&req_queue);	1099	self->req = req = reqq_shift (&req_queue);
932		1100
933	if (req)	1101	if (req)
934	break;	1102	break;
935		1103
936	pthread_cond_wait (&reqwait, &reqlock);	1104	++idle;
		1105
		1106	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
		1107	== ETIMEDOUT)
		1108	{
		1109	if (idle > max_idle)
		1110	{
		1111	--idle;
		1112	UNLOCK (reqlock);
		1113	LOCK (wrklock);
		1114	--started;
		1115	UNLOCK (wrklock);
		1116	goto quit;
		1117	}
		1118
		1119	/* we are allowed to idle, so do so without any timeout */
		1120	COND_WAIT (reqwait, reqlock);
		1121	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1122	}
		1123
		1124	--idle;
937	}	1125	}
		1126
		1127	--nready;
938		1128
939	UNLOCK (reqlock);	1129	UNLOCK (reqlock);
940		1130
941	errno = 0; /* strictly unnecessary */	1131	errno = 0; /* strictly unnecessary */
942	type = req->type; /* remember type for QUIT check */
943		1132
944	if (!(req->flags & FLAG_CANCELLED))	1133	if (!(req->flags & FLAG_CANCELLED))
945	switch (type)	1134	switch (req->type)
946	{	1135	{
947	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1136	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1137	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
949		1138
950	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1139	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;	1140	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
952		1141
953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1142	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1143	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1144	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
956		1145
		1146	case REQ_CHOWN: req->result = chown (req->ptr1, req->int2, req->int3); break;
		1147	case REQ_FCHOWN: req->result = fchown (req->int1, req->int2, req->int3); break;
		1148	case REQ_CHMOD: req->result = chmod (req->ptr1, req->mode); break;
		1149	case REQ_FCHMOD: req->result = fchmod (req->int1, req->mode); break;
		1150
957	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1151	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
958	case REQ_CLOSE: req->result = close (req->fd); break;	1152	case REQ_CLOSE: req->result = close (req->int1); break;
959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1153	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
960	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1154	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1155	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
961	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1156	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1157	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1158	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1159	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1160	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
964		1161
965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1162	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
966	case REQ_FSYNC: req->result = fsync (req->fd); break;	1163	case REQ_FSYNC: req->result = fsync (req->int1); break;
967	case REQ_READDIR: scandir_ (req, self); break;	1164	case REQ_READDIR: scandir_ (req, self); break;
968		1165
969	case REQ_BUSY:	1166	case REQ_BUSY:
970	{	1167	{
971	struct timeval tv;	1168	struct timeval tv;
972		1169
973	tv.tv_sec = req->fd;	1170	tv.tv_sec = req->nv1;
974	tv.tv_usec = req->fd2;	1171	tv.tv_usec = (req->nv1 - tv.tv_usec) * 1000000.;
975		1172
976	req->result = select (0, 0, 0, 0, &tv);	1173	req->result = select (0, 0, 0, 0, &tv);
977	}	1174	}
978		1175
		1176	case REQ_UTIME:
		1177	case REQ_FUTIME:
		1178	{
		1179	struct timeval tv[2];
		1180	struct timeval *times;
		1181
		1182	if (req->nv1 != -1. || req->nv2 != -1.)
		1183	{
		1184	tv[0].tv_sec = req->nv1;
		1185	tv[0].tv_usec = (req->nv1 - tv[0].tv_sec) * 1000000.;
		1186	tv[1].tv_sec = req->nv2;
		1187	tv[1].tv_usec = (req->nv2 - tv[1].tv_sec) * 1000000.;
		1188
		1189	times = tv;
		1190	}
		1191	else
		1192	times = 0;
		1193
		1194
		1195	req->result = req->type == REQ_FUTIME
		1196	? futimes (req->int1, times)
		1197	: utimes (req->ptr1, times);
		1198	}
		1199
979	case REQ_GROUP:	1200	case REQ_GROUP:
980	case REQ_NOP:	1201	case REQ_NOP:
		1202	break;
		1203
981	case REQ_QUIT:	1204	case REQ_QUIT:
982	break;	1205	goto quit;
983		1206
984	default:	1207	default:
985	req->result = ENOSYS;	1208	req->result = -1;
986	break;	1209	break;
987	}	1210	}
988		1211
989	req->errorno = errno;	1212	req->errorno = errno;
990		1213
991	LOCK (reslock);	1214	LOCK (reslock);
992		1215
		1216	++npending;
		1217
993	if (!reqq_push (&res_queue, req))	1218	if (!reqq_push (&res_queue, req))
		1219	{
994	/* write a dummy byte to the pipe so fh becomes ready */	1220	/* write a dummy byte to the pipe so fh becomes ready */
995	write (respipe [1], &respipe, 1);	1221	write (respipe [1], &respipe, 1);
		1222
		1223	/* optionally signal the main thread asynchronously */
		1224	if (main_sig)
		1225	pthread_kill (main_tid, main_sig);
		1226	}
996		1227
997	self->req = 0;	1228	self->req = 0;
998	worker_clear (self);	1229	worker_clear (self);
999		1230
1000	UNLOCK (reslock);	1231	UNLOCK (reslock);
1001	}	1232	}
1002	while (type != REQ_QUIT);
1003		1233
		1234	quit:
1004	LOCK (wrklock);	1235	LOCK (wrklock);
1005	worker_free (self);	1236	worker_free (self);
1006	UNLOCK (wrklock);	1237	UNLOCK (wrklock);
1007		1238
1008	return 0;	1239	return 0;
…		…
1055		1286
1056	worker_clear (wrk);	1287	worker_clear (wrk);
1057	worker_free (wrk);	1288	worker_free (wrk);
1058	}	1289	}
1059		1290
1060	started = 0;	1291	started = 0;
		1292	idle = 0;
1061	nreqs = 0;	1293	nreqs = 0;
		1294	nready = 0;
		1295	npending = 0;
1062		1296
1063	close (respipe [0]);	1297	close (respipe [0]);
1064	close (respipe [1]);	1298	close (respipe [1]);
1065	create_pipe ();	1299	create_pipe ();
1066		1300
…		…
1093	PROTOTYPES: ENABLE	1327	PROTOTYPES: ENABLE
1094		1328
1095	BOOT:	1329	BOOT:
1096	{	1330	{
1097	HV *stash = gv_stashpv ("IO::AIO", 1);	1331	HV *stash = gv_stashpv ("IO::AIO", 1);
		1332
1098	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1333	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1099	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1334	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1100	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1335	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1336	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1337	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1338	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1339	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
1101		1340
1102	create_pipe ();	1341	create_pipe ();
1103	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1342	ATFORK (atfork_prepare, atfork_parent, atfork_child);
1104	}	1343	}
1105		1344
1106	void	1345	void
1107	min_parallel (nthreads)	1346	max_poll_reqs (int nreqs)
1108	int nthreads
1109	PROTOTYPE: $	1347	PROTOTYPE: $
		1348	CODE:
		1349	max_poll_reqs = nreqs;
1110		1350
1111	void	1351	void
1112	max_parallel (nthreads)	1352	max_poll_time (double nseconds)
1113	int nthreads
1114	PROTOTYPE: $	1353	PROTOTYPE: $
		1354	CODE:
		1355	max_poll_time = nseconds * AIO_TICKS;
1115		1356
1116	void	1357	void
		1358	min_parallel (int nthreads)
		1359	PROTOTYPE: $
		1360
		1361	void
		1362	max_parallel (int nthreads)
		1363	PROTOTYPE: $
		1364
		1365	void
		1366	max_idle (int nthreads)
		1367	PROTOTYPE: $
		1368	CODE:
		1369	set_max_idle (nthreads);
		1370
		1371	int
		1372	max_outstanding (int maxreqs)
		1373	PROTOTYPE: $
		1374	CODE:
		1375	RETVAL = max_outstanding;
		1376	max_outstanding = maxreqs;
		1377	OUTPUT:
		1378	RETVAL
		1379
		1380	void
1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1381	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1118	SV * pathname
1119	int flags
1120	int mode
1121	SV * callback
1122	PROTOTYPE: $$$;$	1382	PROTOTYPE: $$$;$
1123	PPCODE:	1383	PPCODE:
1124	{	1384	{
1125	dREQ;	1385	dREQ;
1126		1386
1127	req->type = REQ_OPEN;	1387	req->type = REQ_OPEN;
1128	req->data = newSVsv (pathname);	1388	req->sv1 = newSVsv (pathname);
1129	req->dataptr = SvPVbyte_nolen (req->data);	1389	req->ptr1 = SvPVbyte_nolen (req->sv1);
1130	req->fd = flags;	1390	req->int1 = flags;
1131	req->mode = mode;	1391	req->mode = mode;
1132		1392
1133	REQ_SEND;	1393	REQ_SEND;
1134	}	1394	}
1135		1395
1136	void	1396	void
1137	aio_close (fh,callback=&PL_sv_undef)	1397	aio_close (SV *fh, SV *callback=&PL_sv_undef)
1138	SV * fh
1139	SV * callback
1140	PROTOTYPE: $;$	1398	PROTOTYPE: $;$
1141	ALIAS:	1399	ALIAS:
1142	aio_close = REQ_CLOSE	1400	aio_close = REQ_CLOSE
1143	aio_fsync = REQ_FSYNC	1401	aio_fsync = REQ_FSYNC
1144	aio_fdatasync = REQ_FDATASYNC	1402	aio_fdatasync = REQ_FDATASYNC
1145	PPCODE:	1403	PPCODE:
1146	{	1404	{
1147	dREQ;	1405	dREQ;
1148		1406
1149	req->type = ix;	1407	req->type = ix;
1150	req->fh = newSVsv (fh);	1408	req->sv1 = newSVsv (fh);
1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1409	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1152		1410
1153	REQ_SEND (req);	1411	REQ_SEND (req);
1154	}	1412	}
1155		1413
1156	void	1414	void
1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1415	aio_read (SV *fh, UV offset, UV length, SV8 *data, UV dataoffset, SV *callback=&PL_sv_undef)
1158	SV * fh
1159	UV offset
1160	UV length
1161	SV * data
1162	UV dataoffset
1163	SV * callback
1164	ALIAS:	1416	ALIAS:
1165	aio_read = REQ_READ	1417	aio_read = REQ_READ
1166	aio_write = REQ_WRITE	1418	aio_write = REQ_WRITE
1167	PROTOTYPE: $$$$$;$	1419	PROTOTYPE: $$$$$;$
1168	PPCODE:	1420	PPCODE:
1169	{	1421	{
1170	aio_req req;
1171	STRLEN svlen;	1422	STRLEN svlen;
1172	char *svptr = SvPVbyte (data, svlen);	1423	char *svptr = SvPVbyte (data, svlen);
1173		1424
1174	SvUPGRADE (data, SVt_PV);	1425	SvUPGRADE (data, SVt_PV);
1175	SvPOK_on (data);	1426	SvPOK_on (data);
…		…
1187	length = svlen - dataoffset;	1438	length = svlen - dataoffset;
1188	}	1439	}
1189	else	1440	else
1190	{	1441	{
1191	/* read: grow scalar as necessary */	1442	/* read: grow scalar as necessary */
1192	svptr = SvGROW (data, length + dataoffset);	1443	svptr = SvGROW (data, length + dataoffset + 1);
1193	}	1444	}
1194		1445
1195	if (length < 0)	1446	if (length < 0)
1196	croak ("length must not be negative");	1447	croak ("length must not be negative");
1197		1448
1198	{	1449	{
1199	dREQ;	1450	dREQ;
1200		1451
1201	req->type = ix;	1452	req->type = ix;
1202	req->fh = newSVsv (fh);	1453	req->sv1 = newSVsv (fh);
1203	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1454	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
1204	: IoOFP (sv_2io (fh)));	1455	: IoOFP (sv_2io (fh)));
1205	req->offset = offset;	1456	req->offs = offset;
1206	req->length = length;	1457	req->size = length;
1207	req->data = SvREFCNT_inc (data);	1458	req->sv2 = SvREFCNT_inc (data);
1208	req->dataptr = (char *)svptr + dataoffset;	1459	req->ptr1 = (char *)svptr + dataoffset;
		1460	req->stroffset = dataoffset;
1209		1461
1210	if (!SvREADONLY (data))	1462	if (!SvREADONLY (data))
1211	{	1463	{
1212	SvREADONLY_on (data);	1464	SvREADONLY_on (data);
1213	req->data2ptr = (void *)data;	1465	req->flags |= FLAG_SV2_RO_OFF;
1214	}	1466	}
1215		1467
1216	REQ_SEND;	1468	REQ_SEND;
1217	}	1469	}
1218	}	1470	}
1219		1471
1220	void	1472	void
		1473	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1474	PROTOTYPE: $$;$
		1475	PPCODE:
		1476	{
		1477	SV *data;
		1478	dREQ;
		1479
		1480	data = newSV (NAME_MAX);
		1481	SvPOK_on (data);
		1482
		1483	req->type = REQ_READLINK;
		1484	req->sv1 = newSVsv (path);
		1485	req->ptr2 = SvPVbyte_nolen (req->sv1);
		1486	req->sv2 = data;
		1487	req->ptr1 = SvPVbyte_nolen (data);
		1488
		1489	REQ_SEND;
		1490	}
		1491
		1492	void
1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1493	aio_sendfile (SV *out_fh, SV *in_fh, UV in_offset, UV length, SV *callback=&PL_sv_undef)
1222	SV * out_fh
1223	SV * in_fh
1224	UV in_offset
1225	UV length
1226	SV * callback
1227	PROTOTYPE: $$$$;$	1494	PROTOTYPE: $$$$;$
1228	PPCODE:	1495	PPCODE:
1229	{	1496	{
1230	dREQ;	1497	dREQ;
1231		1498
1232	req->type = REQ_SENDFILE;	1499	req->type = REQ_SENDFILE;
1233	req->fh = newSVsv (out_fh);	1500	req->sv1 = newSVsv (out_fh);
1234	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1501	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1235	req->fh2 = newSVsv (in_fh);	1502	req->sv2 = newSVsv (in_fh);
1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1503	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1237	req->offset = in_offset;	1504	req->offs = in_offset;
1238	req->length = length;	1505	req->size = length;
1239		1506
1240	REQ_SEND;	1507	REQ_SEND;
1241	}	1508	}
1242		1509
1243	void	1510	void
1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1511	aio_readahead (SV *fh, UV offset, IV length, SV *callback=&PL_sv_undef)
1245	SV * fh
1246	UV offset
1247	IV length
1248	SV * callback
1249	PROTOTYPE: $$$;$	1512	PROTOTYPE: $$$;$
1250	PPCODE:	1513	PPCODE:
1251	{	1514	{
1252	dREQ;	1515	dREQ;
1253		1516
1254	req->type = REQ_READAHEAD;	1517	req->type = REQ_READAHEAD;
1255	req->fh = newSVsv (fh);	1518	req->sv1 = newSVsv (fh);
1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1519	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1257	req->offset = offset;	1520	req->offs = offset;
1258	req->length = length;	1521	req->size = length;
1259		1522
1260	REQ_SEND;	1523	REQ_SEND;
1261	}	1524	}
1262		1525
1263	void	1526	void
1264	aio_stat (fh_or_path,callback=&PL_sv_undef)	1527	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1265	SV * fh_or_path
1266	SV * callback
1267	ALIAS:	1528	ALIAS:
1268	aio_stat = REQ_STAT	1529	aio_stat = REQ_STAT
1269	aio_lstat = REQ_LSTAT	1530	aio_lstat = REQ_LSTAT
1270	PPCODE:	1531	PPCODE:
1271	{	1532	{
1272	dREQ;	1533	dREQ;
1273		1534
1274	New (0, req->statdata, 1, Stat_t);	1535	req->ptr2 = malloc (sizeof (Stat_t));
1275	if (!req->statdata)	1536	if (!req->ptr2)
1276	{	1537	{
1277	req_free (req);	1538	req_free (req);
1278	croak ("out of memory during aio_req->statdata allocation");	1539	croak ("out of memory during aio_stat statdata allocation");
1279	}	1540	}
		1541
		1542	req->flags |= FLAG_PTR2_FREE;
		1543	req->sv1 = newSVsv (fh_or_path);
1280		1544
1281	if (SvPOK (fh_or_path))	1545	if (SvPOK (fh_or_path))
1282	{	1546	{
1283	req->type = ix;	1547	req->type = ix;
1284	req->data = newSVsv (fh_or_path);
1285	req->dataptr = SvPVbyte_nolen (req->data);	1548	req->ptr1 = SvPVbyte_nolen (req->sv1);
1286	}	1549	}
1287	else	1550	else
1288	{	1551	{
1289	req->type = REQ_FSTAT;	1552	req->type = REQ_FSTAT;
1290	req->fh = newSVsv (fh_or_path);
1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1553	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1292	}	1554	}
1293		1555
1294	REQ_SEND;	1556	REQ_SEND;
1295	}	1557	}
1296		1558
1297	void	1559	void
		1560	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1561	PPCODE:
		1562	{
		1563	dREQ;
		1564
		1565	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1566	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1567	req->sv1 = newSVsv (fh_or_path);
		1568
		1569	if (SvPOK (fh_or_path))
		1570	{
		1571	req->type = REQ_UTIME;
		1572	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1573	}
		1574	else
		1575	{
		1576	req->type = REQ_FUTIME;
		1577	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1578	}
		1579
		1580	REQ_SEND;
		1581	}
		1582
		1583	void
		1584	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1585	PPCODE:
		1586	{
		1587	dREQ;
		1588
		1589	req->mode = mode;
		1590	req->sv1 = newSVsv (fh_or_path);
		1591
		1592	if (SvPOK (fh_or_path))
		1593	{
		1594	req->type = REQ_CHMOD;
		1595	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1596	}
		1597	else
		1598	{
		1599	req->type = REQ_FCHMOD;
		1600	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1601	}
		1602
		1603	REQ_SEND;
		1604	}
		1605
		1606	void
		1607	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1608	PPCODE:
		1609	{
		1610	dREQ;
		1611
		1612	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1613	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1614	req->sv1 = newSVsv (fh_or_path);
		1615
		1616	if (SvPOK (fh_or_path))
		1617	{
		1618	req->type = REQ_CHOWN;
		1619	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1620	}
		1621	else
		1622	{
		1623	req->type = REQ_FCHOWN;
		1624	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1625	}
		1626
		1627	REQ_SEND;
		1628	}
		1629
		1630	void
1298	aio_unlink (pathname,callback=&PL_sv_undef)	1631	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1299	SV * pathname
1300	SV * callback
1301	ALIAS:	1632	ALIAS:
1302	aio_unlink = REQ_UNLINK	1633	aio_unlink = REQ_UNLINK
1303	aio_rmdir = REQ_RMDIR	1634	aio_rmdir = REQ_RMDIR
1304	aio_readdir = REQ_READDIR	1635	aio_readdir = REQ_READDIR
1305	PPCODE:	1636	PPCODE:
1306	{	1637	{
1307	dREQ;	1638	dREQ;
1308		1639
1309	req->type = ix;	1640	req->type = ix;
1310	req->data = newSVsv (pathname);	1641	req->sv1 = newSVsv (pathname);
1311	req->dataptr = SvPVbyte_nolen (req->data);	1642	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1643
		1644	REQ_SEND;
		1645	}
		1646
		1647	void
		1648	aio_mkdir (SV8 *pathname, int mode, SV *callback=&PL_sv_undef)
		1649	PPCODE:
		1650	{
		1651	dREQ;
1312		1652
		1653	req->type = REQ_MKDIR;
		1654	req->sv1 = newSVsv (pathname);
		1655	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1656	req->mode = mode;
		1657
1313	REQ_SEND;	1658	REQ_SEND;
1314	}	1659	}
1315		1660
1316	void	1661	void
1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1662	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1318	SV * oldpath
1319	SV * newpath
1320	SV * callback
1321	ALIAS:	1663	ALIAS:
1322	aio_link = REQ_LINK	1664	aio_link = REQ_LINK
1323	aio_symlink = REQ_SYMLINK	1665	aio_symlink = REQ_SYMLINK
1324	aio_rename = REQ_RENAME	1666	aio_rename = REQ_RENAME
1325	PPCODE:	1667	PPCODE:
1326	{	1668	{
1327	dREQ;	1669	dREQ;
1328		1670
1329	req->type = ix;	1671	req->type = ix;
1330	req->fh = newSVsv (oldpath);	1672	req->sv2 = newSVsv (oldpath);
1331	req->data2ptr = SvPVbyte_nolen (req->fh);	1673	req->ptr2 = SvPVbyte_nolen (req->sv2);
1332	req->data = newSVsv (newpath);	1674	req->sv1 = newSVsv (newpath);
1333	req->dataptr = SvPVbyte_nolen (req->data);	1675	req->ptr1 = SvPVbyte_nolen (req->sv1);
1334		1676
1335	REQ_SEND;	1677	REQ_SEND;
1336	}	1678	}
1337		1679
1338	void	1680	void
1339	aio_busy (delay,callback=&PL_sv_undef)	1681	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1340	double delay
1341	SV * callback
1342	PPCODE:	1682	PPCODE:
1343	{	1683	{
1344	dREQ;	1684	dREQ;
		1685
		1686	req->type = REQ_MKNOD;
		1687	req->sv1 = newSVsv (pathname);
		1688	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1689	req->mode = (mode_t)mode;
		1690	req->offs = dev;
		1691
		1692	REQ_SEND;
		1693	}
		1694
		1695	void
		1696	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1697	PPCODE:
		1698	{
		1699	dREQ;
1345		1700
1346	req->type = REQ_BUSY;	1701	req->type = REQ_BUSY;
1347	req->fd = delay < 0. ? 0 : delay;	1702	req->nv1 = delay < 0. ? 0. : delay;
1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1349		1703
1350	REQ_SEND;	1704	REQ_SEND;
1351	}	1705	}
1352		1706
1353	void	1707	void
1354	aio_group (callback=&PL_sv_undef)	1708	aio_group (SV *callback=&PL_sv_undef)
1355	SV * callback
1356	PROTOTYPE: ;$	1709	PROTOTYPE: ;$
1357	PPCODE:	1710	PPCODE:
1358	{	1711	{
1359	dREQ;	1712	dREQ;
1360		1713
1361	req->type = REQ_GROUP;	1714	req->type = REQ_GROUP;
		1715
1362	req_send (req);	1716	req_send (req);
1363
1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1717	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1365	}	1718	}
1366		1719
1367	void	1720	void
1368	aio_nop (callback=&PL_sv_undef)	1721	aio_nop (SV *callback=&PL_sv_undef)
1369	SV * callback
1370	PPCODE:	1722	PPCODE:
1371	{	1723	{
1372	dREQ;	1724	dREQ;
1373		1725
1374	req->type = REQ_NOP;	1726	req->type = REQ_NOP;
1375		1727
1376	REQ_SEND;	1728	REQ_SEND;
1377	}	1729	}
1378		1730
1379	void	1731	int
1380	aioreq_pri (int pri = DEFAULT_PRI)	1732	aioreq_pri (int pri = 0)
1381	CODE:	1733	PROTOTYPE: ;$
		1734	CODE:
		1735	RETVAL = next_pri - PRI_BIAS;
		1736	if (items > 0)
		1737	{
1382	if (pri < PRI_MIN) pri = PRI_MIN;	1738	if (pri < PRI_MIN) pri = PRI_MIN;
1383	if (pri > PRI_MAX) pri = PRI_MAX;	1739	if (pri > PRI_MAX) pri = PRI_MAX;
1384	next_pri = pri + PRI_BIAS;	1740	next_pri = pri + PRI_BIAS;
		1741	}
		1742	OUTPUT:
		1743	RETVAL
1385		1744
1386	void	1745	void
1387	aioreq_nice (int nice = 0)	1746	aioreq_nice (int nice = 0)
1388	CODE:	1747	CODE:
1389	nice = next_pri - nice;	1748	nice = next_pri - nice;
1390	if (nice < PRI_MIN) nice = PRI_MIN;	1749	if (nice < PRI_MIN) nice = PRI_MIN;
1391	if (nice > PRI_MAX) nice = PRI_MAX;	1750	if (nice > PRI_MAX) nice = PRI_MAX;
1392	next_pri = nice + PRI_BIAS;	1751	next_pri = nice + PRI_BIAS;
1393		1752
1394	void	1753	void
1395	flush ()	1754	flush ()
1396	PROTOTYPE:	1755	PROTOTYPE:
1397	CODE:	1756	CODE:
1398	while (nreqs)	1757	while (nreqs)
1399	{	1758	{
1400	poll_wait ();	1759	poll_wait ();
1401	poll_cb (0);	1760	poll_cb ();
1402	}	1761	}
1403		1762
1404	void	1763	int
1405	poll()	1764	poll()
1406	PROTOTYPE:	1765	PROTOTYPE:
1407	CODE:	1766	CODE:
1408	if (nreqs)
1409	{
1410	poll_wait ();	1767	poll_wait ();
1411	poll_cb (0);	1768	RETVAL = poll_cb ();
1412	}	1769	OUTPUT:
		1770	RETVAL
1413		1771
1414	int	1772	int
1415	poll_fileno()	1773	poll_fileno()
1416	PROTOTYPE:	1774	PROTOTYPE:
1417	CODE:	1775	CODE:
…		…
1421		1779
1422	int	1780	int
1423	poll_cb(...)	1781	poll_cb(...)
1424	PROTOTYPE:	1782	PROTOTYPE:
1425	CODE:	1783	CODE:
1426	RETVAL = poll_cb (0);	1784	RETVAL = poll_cb ();
1427	OUTPUT:
1428	RETVAL
1429
1430	int
1431	poll_some(int max = 0)
1432	PROTOTYPE: $
1433	CODE:
1434	RETVAL = poll_cb (max);
1435	OUTPUT:	1785	OUTPUT:
1436	RETVAL	1786	RETVAL
1437		1787
1438	void	1788	void
1439	poll_wait()	1789	poll_wait()
1440	PROTOTYPE:	1790	PROTOTYPE:
1441	CODE:	1791	CODE:
1442	if (nreqs)
1443	poll_wait ();	1792	poll_wait ();
		1793
		1794	void
		1795	setsig (int signum = SIGIO)
		1796	PROTOTYPE: ;$
		1797	CODE:
		1798	{
		1799	if (block_sig_level)
		1800	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1801
		1802	LOCK (reslock);
		1803	main_tid = pthread_self ();
		1804	main_sig = signum;
		1805	UNLOCK (reslock);
		1806
		1807	if (main_sig && npending)
		1808	pthread_kill (main_tid, main_sig);
		1809	}
		1810
		1811	void
		1812	aio_block (SV *cb)
		1813	PROTOTYPE: &
		1814	PPCODE:
		1815	{
		1816	int count;
		1817
		1818	block_sig ();
		1819	PUSHMARK (SP);
		1820	PUTBACK;
		1821	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1822	SPAGAIN;
		1823	unblock_sig ();
		1824
		1825	if (SvTRUE (ERRSV))
		1826	croak (0);
		1827
		1828	XSRETURN (count);
		1829	}
1444		1830
1445	int	1831	int
1446	nreqs()	1832	nreqs()
1447	PROTOTYPE:	1833	PROTOTYPE:
1448	CODE:	1834	CODE:
1449	RETVAL = nreqs;	1835	RETVAL = nreqs;
1450	OUTPUT:	1836	OUTPUT:
1451	RETVAL	1837	RETVAL
1452		1838
		1839	int
		1840	nready()
		1841	PROTOTYPE:
		1842	CODE:
		1843	RETVAL = get_nready ();
		1844	OUTPUT:
		1845	RETVAL
		1846
		1847	int
		1848	npending()
		1849	PROTOTYPE:
		1850	CODE:
		1851	RETVAL = get_npending ();
		1852	OUTPUT:
		1853	RETVAL
		1854
		1855	int
		1856	nthreads()
		1857	PROTOTYPE:
		1858	CODE:
		1859	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1860	RETVAL = started;
		1861	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1862	OUTPUT:
		1863	RETVAL
		1864
1453	PROTOTYPES: DISABLE	1865	PROTOTYPES: DISABLE
1454		1866
1455	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1867	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1456		1868
1457	void	1869	void
…		…
1472	PPCODE:	1884	PPCODE:
1473	{	1885	{
1474	int i;	1886	int i;
1475	aio_req req;	1887	aio_req req;
1476		1888
		1889	if (main_sig && !block_sig_level)
		1890	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1891
1477	if (grp->fd == 2)	1892	if (grp->int1 == 2)
1478	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1893	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1479		1894
1480	for (i = 1; i < items; ++i )	1895	for (i = 1; i < items; ++i )
1481	{	1896	{
1482	if (GIMME_V != G_VOID)	1897	if (GIMME_V != G_VOID)
…		…
1484		1899
1485	req = SvAIO_REQ (ST (i));	1900	req = SvAIO_REQ (ST (i));
1486		1901
1487	if (req)	1902	if (req)
1488	{	1903	{
1489	++grp->length;	1904	++grp->size;
1490	req->grp = grp;	1905	req->grp = grp;
1491		1906
1492	req->grp_prev = 0;	1907	req->grp_prev = 0;
1493	req->grp_next = grp->grp_first;	1908	req->grp_next = grp->grp_first;
1494		1909
…		…
1508	void	1923	void
1509	result (aio_req grp, ...)	1924	result (aio_req grp, ...)
1510	CODE:	1925	CODE:
1511	{	1926	{
1512	int i;	1927	int i;
		1928	AV *av;
		1929
		1930	grp->errorno = errno;
		1931
1513	AV *av = newAV ();	1932	av = newAV ();
1514		1933
1515	for (i = 1; i < items; ++i )	1934	for (i = 1; i < items; ++i )
1516	av_push (av, newSVsv (ST (i)));	1935	av_push (av, newSVsv (ST (i)));
1517		1936
1518	SvREFCNT_dec (grp->data);	1937	SvREFCNT_dec (grp->sv1);
1519	grp->data = (SV *)av;	1938	grp->sv1 = (SV *)av;
1520	}	1939	}
		1940
		1941	void
		1942	errno (aio_req grp, int errorno = errno)
		1943	CODE:
		1944	grp->errorno = errorno;
1521		1945
1522	void	1946	void
1523	limit (aio_req grp, int limit)	1947	limit (aio_req grp, int limit)
1524	CODE:	1948	CODE:
1525	grp->fd2 = limit;	1949	grp->int2 = limit;
1526	aio_grp_feed (grp);	1950	aio_grp_feed (grp);
1527		1951
1528	void	1952	void
1529	feed (aio_req grp, SV *callback=&PL_sv_undef)	1953	feed (aio_req grp, SV *callback=&PL_sv_undef)
1530	CODE:	1954	CODE:
1531	{	1955	{
1532	SvREFCNT_dec (grp->fh2);	1956	SvREFCNT_dec (grp->sv2);
1533	grp->fh2 = newSVsv (callback);	1957	grp->sv2 = newSVsv (callback);
1534		1958
1535	if (grp->fd2 <= 0)	1959	if (grp->int2 <= 0)
1536	grp->fd2 = 2;	1960	grp->int2 = 2;
1537		1961
1538	aio_grp_feed (grp);	1962	aio_grp_feed (grp);
1539	}	1963	}
1540		1964

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