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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.39 by root, Mon Feb 6 23:54:12 2006 UTC vs.
Revision 1.96 by root, Sat Dec 23 04:49:37 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"
…		…
8	#include "autoconf/config.h"	17	#include "autoconf/config.h"
9		18
10	#include <pthread.h>	19	#include <pthread.h>
11		20
12	#include <stddef.h>	21	#include <stddef.h>
		22	#include <stdlib.h>
		23	#include <errno.h>
		24	#include <sys/time.h>
		25	#include <sys/select.h>
13	#include <sys/types.h>	26	#include <sys/types.h>
14	#include <sys/stat.h>	27	#include <sys/stat.h>
15	#include <limits.h>	28	#include <limits.h>
16	#include <unistd.h>	29	#include <unistd.h>
17	#include <fcntl.h>	30	#include <fcntl.h>
…		…
31	# else	44	# else
32	# error sendfile support requested but not available	45	# error sendfile support requested but not available
33	# endif	46	# endif
34	#endif	47	#endif
35		48
		49	/* number of seconds after which idle threads exit */
		50	#define IDLE_TIMEOUT 10
		51
36	/* used for struct dirent, AIX doesn't provide it */	52	/* used for struct dirent, AIX doesn't provide it */
37	#ifndef NAME_MAX	53	#ifndef NAME_MAX
38	# define NAME_MAX 4096	54	# define NAME_MAX 4096
39	#endif	55	#endif
40		56
		57	#ifndef PTHREAD_STACK_MIN
		58	/* care for broken platforms, e.g. windows */
		59	# define PTHREAD_STACK_MIN 16384
		60	#endif
		61
41	#if __ia64	62	#if __ia64
42	# define STACKSIZE 65536	63	# define STACKSIZE 65536
		64	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		65	# define STACKSIZE PTHREAD_STACK_MIN
43	#else	66	#else
44	# define STACKSIZE 8192	67	# define STACKSIZE 16384
45	#endif	68	#endif
		69
		70	/* wether word reads are potentially non-atomic.
		71	* this is conservatice, likely most arches this runs
		72	* on have atomic word read/writes.
		73	*/
		74	#ifndef WORDACCESS_UNSAFE
		75	# if __i386 || __x86_64
		76	# define WORDACCESS_UNSAFE 0
		77	# else
		78	# define WORDACCESS_UNSAFE 1
		79	# endif
		80	#endif
		81
		82	/* buffer size for various temporary buffers */
		83	#define AIO_BUFSIZE 65536
		84
		85	#define dBUF \
		86	char *aio_buf; \
		87	LOCK (wrklock); \
		88	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		89	UNLOCK (wrklock); \
		90	if (!aio_buf) \
		91	return -1;
		92
		93	typedef SV SV8; /* byte-sv, used for argument-checking */
46		94
47	enum {	95	enum {
48	REQ_QUIT,	96	REQ_QUIT,
49	REQ_OPEN, REQ_CLOSE,	97	REQ_OPEN, REQ_CLOSE,
50	REQ_READ, REQ_WRITE, REQ_READAHEAD,	98	REQ_READ, REQ_WRITE, REQ_READAHEAD,
51	REQ_SENDFILE,	99	REQ_SENDFILE,
52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	100	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
53	REQ_FSYNC, REQ_FDATASYNC,	101	REQ_FSYNC, REQ_FDATASYNC,
54	REQ_UNLINK, REQ_RMDIR,	102	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
55	REQ_READDIR,	103	REQ_MKNOD, REQ_READDIR,
56	REQ_SYMLINK,	104	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		105	REQ_GROUP, REQ_NOP,
		106	REQ_BUSY,
57	};	107	};
58		108
		109	#define AIO_REQ_KLASS "IO::AIO::REQ"
		110	#define AIO_GRP_KLASS "IO::AIO::GRP"
		111
59	typedef struct aio_cb {	112	typedef struct aio_cb
		113	{
60	struct aio_cb *volatile next;	114	struct aio_cb *volatile next;
61		115
		116	SV *callback, *fh;
		117	SV *sv1, *sv2;
		118	void *ptr1, *ptr2;
		119	off_t offs;
		120	size_t size;
		121	ssize_t result;
		122
		123	STRLEN stroffset;
62	int type;	124	int type;
63		125	int int1, int2;
64	/* should receive a cleanup, with unions */	126	int errorno;
65	int fd, fd2;
66	off_t offset;
67	size_t length;
68	ssize_t result;
69	mode_t mode; /* open */	127	mode_t mode; /* open */
70	int errorno;
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	STRLEN dataoffset;
75		128
76	Stat_t *statdata;	129	unsigned char flags;
		130	unsigned char pri;
		131
		132	SV *self; /* the perl counterpart of this request, if any */
		133	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
77	} aio_cb;	134	} aio_cb;
78		135
		136	enum {
		137	FLAG_CANCELLED = 0x01, /* request was cancelled */
		138	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
		139	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
		140	};
		141
79	typedef aio_cb *aio_req;	142	typedef aio_cb *aio_req;
		143	typedef aio_cb *aio_req_ornot;
80		144
		145	enum {
		146	PRI_MIN = -4,
		147	PRI_MAX = 4,
		148
		149	DEFAULT_PRI = 0,
		150	PRI_BIAS = -PRI_MIN,
		151	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		152	};
		153
		154	#define AIO_TICKS ((1000000 + 1023) >> 10)
		155
		156	static unsigned int max_poll_time = 0;
		157	static unsigned int max_poll_reqs = 0;
		158
		159	/* calculcate time difference in ~1/AIO_TICKS of a second */
		160	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		161	{
		162	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		163	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		164	}
		165
		166	static pthread_t main_tid;
		167	static int main_sig;
		168	static int block_sig_level;
		169
		170	void block_sig ()
		171	{
		172	sigset_t ss;
		173
		174	if (block_sig_level++)
		175	return;
		176
		177	if (!main_sig)
		178	return;
		179
		180	sigemptyset (&ss);
		181	sigaddset (&ss, main_sig);
		182	pthread_sigmask (SIG_BLOCK, &ss, 0);
		183	}
		184
		185	void unblock_sig ()
		186	{
		187	sigset_t ss;
		188
		189	if (--block_sig_level)
		190	return;
		191
		192	if (!main_sig)
		193	return;
		194
		195	sigemptyset (&ss);
		196	sigaddset (&ss, main_sig);
		197	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
		198	}
		199
		200	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		201
81	static int started, wanted;	202	static unsigned int started, idle, wanted;
82	static volatile int nreqs;	203
83	static int max_outstanding = 1<<30;	204	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		205	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		206	#else
		207	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		208	#endif
		209
		210	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		211	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		212
		213	/* worker threads management */
		214	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		215
		216	typedef struct worker {
		217	/* locked by wrklock */
		218	struct worker *prev, *next;
		219
		220	pthread_t tid;
		221
		222	/* locked by reslock, reqlock or wrklock */
		223	aio_req req; /* currently processed request */
		224	void *dbuf;
		225	DIR *dirp;
		226	} worker;
		227
		228	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		229
		230	static void worker_clear (worker *wrk)
		231	{
		232	if (wrk->dirp)
		233	{
		234	closedir (wrk->dirp);
		235	wrk->dirp = 0;
		236	}
		237
		238	if (wrk->dbuf)
		239	{
		240	free (wrk->dbuf);
		241	wrk->dbuf = 0;
		242	}
		243	}
		244
		245	static void worker_free (worker *wrk)
		246	{
		247	wrk->next->prev = wrk->prev;
		248	wrk->prev->next = wrk->next;
		249
		250	free (wrk);
		251	}
		252
		253	static volatile unsigned int nreqs, nready, npending;
		254	static volatile unsigned int max_idle = 4;
		255	static volatile unsigned int max_outstanding = 0xffffffff;
84	static int respipe [2];	256	static int respipe [2];
85		257
86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	258	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	259	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	260	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
89		261
90	static volatile aio_req reqs, reqe; /* queue start, queue end */	262	#if WORDACCESS_UNSAFE
91	static volatile aio_req ress, rese; /* queue start, queue end */
92		263
		264	static unsigned int get_nready ()
		265	{
		266	unsigned int retval;
		267
		268	LOCK (reqlock);
		269	retval = nready;
		270	UNLOCK (reqlock);
		271
		272	return retval;
		273	}
		274
		275	static unsigned int get_npending ()
		276	{
		277	unsigned int retval;
		278
		279	LOCK (reslock);
		280	retval = npending;
		281	UNLOCK (reslock);
		282
		283	return retval;
		284	}
		285
		286	static unsigned int get_nthreads ()
		287	{
		288	unsigned int retval;
		289
		290	LOCK (wrklock);
		291	retval = started;
		292	UNLOCK (wrklock);
		293
		294	return retval;
		295	}
		296
		297	#else
		298
		299	# define get_nready() nready
		300	# define get_npending() npending
		301	# define get_nthreads() started
		302
		303	#endif
		304
		305	/*
		306	* a somewhat faster data structure might be nice, but
		307	* with 8 priorities this actually needs <20 insns
		308	* per shift, the most expensive operation.
		309	*/
		310	typedef struct {
		311	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		312	int size;
		313	} reqq;
		314
		315	static reqq req_queue;
		316	static reqq res_queue;
		317
		318	int reqq_push (reqq *q, aio_req req)
		319	{
		320	int pri = req->pri;
		321	req->next = 0;
		322
		323	if (q->qe[pri])
		324	{
		325	q->qe[pri]->next = req;
		326	q->qe[pri] = req;
		327	}
		328	else
		329	q->qe[pri] = q->qs[pri] = req;
		330
		331	return q->size++;
		332	}
		333
		334	aio_req reqq_shift (reqq *q)
		335	{
		336	int pri;
		337
		338	if (!q->size)
		339	return 0;
		340
		341	--q->size;
		342
		343	for (pri = NUM_PRI; pri--; )
		344	{
		345	aio_req req = q->qs[pri];
		346
		347	if (req)
		348	{
		349	if (!(q->qs[pri] = req->next))
		350	q->qe[pri] = 0;
		351
		352	return req;
		353	}
		354	}
		355
		356	abort ();
		357	}
		358
		359	static int poll_cb ();
		360	static int req_invoke (aio_req req);
		361	static void req_free (aio_req req);
		362	static void req_cancel (aio_req req);
		363
		364	/* must be called at most once */
		365	static SV *req_sv (aio_req req, const char *klass)
		366	{
		367	if (!req->self)
		368	{
		369	req->self = (SV *)newHV ();
		370	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		371	}
		372
		373	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		374	}
		375
		376	static aio_req SvAIO_REQ (SV *sv)
		377	{
		378	MAGIC *mg;
		379
		380	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		381	croak ("object of class " AIO_REQ_KLASS " expected");
		382
		383	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		384
		385	return mg ? (aio_req)mg->mg_ptr : 0;
		386	}
		387
		388	static void aio_grp_feed (aio_req grp)
		389	{
		390	block_sig ();
		391
		392	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
		393	{
		394	int old_len = grp->size;
		395
		396	if (grp->sv2 && SvOK (grp->sv2))
		397	{
		398	dSP;
		399
		400	ENTER;
		401	SAVETMPS;
		402	PUSHMARK (SP);
		403	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		404	PUTBACK;
		405	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		406	SPAGAIN;
		407	FREETMPS;
		408	LEAVE;
		409	}
		410
		411	/* stop if no progress has been made */
		412	if (old_len == grp->size)
		413	{
		414	SvREFCNT_dec (grp->sv2);
		415	grp->sv2 = 0;
		416	break;
		417	}
		418	}
		419
		420	unblock_sig ();
		421	}
		422
		423	static void aio_grp_dec (aio_req grp)
		424	{
		425	--grp->size;
		426
		427	/* call feeder, if applicable */
		428	aio_grp_feed (grp);
		429
		430	/* finish, if done */
		431	if (!grp->size && grp->int1)
		432	{
		433	block_sig ();
		434
		435	if (!req_invoke (grp))
		436	{
		437	req_free (grp);
		438	unblock_sig ();
		439	croak (0);
		440	}
		441
		442	req_free (grp);
		443	unblock_sig ();
		444	}
		445	}
		446
		447	static int req_invoke (aio_req req)
		448	{
		449	dSP;
		450
		451	if (req->flags & FLAG_SV1_RO_OFF)
		452	SvREADONLY_off (req->sv1);
		453
		454	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		455	{
		456	ENTER;
		457	SAVETMPS;
		458	PUSHMARK (SP);
		459	EXTEND (SP, 1);
		460
		461	switch (req->type)
		462	{
		463	case REQ_READDIR:
		464	{
		465	SV *rv = &PL_sv_undef;
		466
		467	if (req->result >= 0)
		468	{
		469	int i;
		470	char *buf = req->ptr2;
		471	AV *av = newAV ();
		472
		473	av_extend (av, req->result - 1);
		474
		475	for (i = 0; i < req->result; ++i)
		476	{
		477	SV *sv = newSVpv (buf, 0);
		478
		479	av_store (av, i, sv);
		480	buf += SvCUR (sv) + 1;
		481	}
		482
		483	rv = sv_2mortal (newRV_noinc ((SV *)av));
		484	}
		485
		486	PUSHs (rv);
		487	}
		488	break;
		489
		490	case REQ_OPEN:
		491	{
		492	/* convert fd to fh */
		493	SV *fh;
		494
		495	PUSHs (sv_2mortal (newSViv (req->result)));
		496	PUTBACK;
		497	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		498	SPAGAIN;
		499
		500	fh = POPs;
		501	PUSHMARK (SP);
		502	XPUSHs (fh);
		503	}
		504	break;
		505
		506	case REQ_GROUP:
		507	req->int1 = 2; /* mark group as finished */
		508
		509	if (req->sv1)
		510	{
		511	int i;
		512	AV *av = (AV *)req->sv1;
		513
		514	EXTEND (SP, AvFILL (av) + 1);
		515	for (i = 0; i <= AvFILL (av); ++i)
		516	PUSHs (*av_fetch (av, i, 0));
		517	}
		518	break;
		519
		520	case REQ_NOP:
		521	case REQ_BUSY:
		522	break;
		523
		524	case REQ_READLINK:
		525	if (req->result > 0)
		526	{
		527	SvCUR_set (req->sv1, req->result);
		528	*SvEND (req->sv1) = 0;
		529	PUSHs (req->sv1);
		530	}
		531	break;
		532
		533	case REQ_STAT:
		534	case REQ_LSTAT:
		535	case REQ_FSTAT:
		536	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		537	PL_laststatval = req->result;
		538	PL_statcache = *(Stat_t *)(req->ptr2);
		539	PUSHs (sv_2mortal (newSViv (req->result)));
		540	break;
		541
		542	case REQ_READ:
		543	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));
		544	*SvEND (req->sv1) = 0;
		545	PUSHs (sv_2mortal (newSViv (req->result)));
		546	break;
		547
		548	default:
		549	PUSHs (sv_2mortal (newSViv (req->result)));
		550	break;
		551	}
		552
		553	errno = req->errorno;
		554
		555	PUTBACK;
		556	call_sv (req->callback, G_VOID | G_EVAL);
		557	SPAGAIN;
		558
		559	FREETMPS;
		560	LEAVE;
		561	}
		562
		563	if (req->grp)
		564	{
		565	aio_req grp = req->grp;
		566
		567	/* unlink request */
		568	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		569	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		570
		571	if (grp->grp_first == req)
		572	grp->grp_first = req->grp_next;
		573
		574	aio_grp_dec (grp);
		575	}
		576
		577	return !SvTRUE (ERRSV);
		578	}
		579
93	static void free_req (aio_req req)	580	static void req_free (aio_req req)
94	{	581	{
95	if (req->data)
96	SvREFCNT_dec (req->data);
97
98	if (req->fh)	582	if (req->self)
		583	{
		584	sv_unmagic (req->self, PERL_MAGIC_ext);
		585	SvREFCNT_dec (req->self);
		586	}
		587
99	SvREFCNT_dec (req->fh);	588	SvREFCNT_dec (req->fh);
100		589	SvREFCNT_dec (req->sv1);
101	if (req->fh2)
102	SvREFCNT_dec (req->fh2);	590	SvREFCNT_dec (req->sv2);
103
104	if (req->statdata)
105	Safefree (req->statdata);
106
107	if (req->callback)
108	SvREFCNT_dec (req->callback);	591	SvREFCNT_dec (req->callback);
109		592
110	if (req->type == REQ_READDIR && req->result >= 0)	593	if (req->flags & FLAG_PTR2_FREE)
111	free (req->data2ptr);	594	free (req->ptr2);
112		595
113	Safefree (req);	596	Safefree (req);
114	}	597	}
115		598
116	static void	599	static void req_cancel_subs (aio_req grp)
117	poll_wait ()
118	{	600	{
119	if (nreqs && !ress)	601	aio_req sub;
		602
		603	if (grp->type != REQ_GROUP)
		604	return;
		605
		606	SvREFCNT_dec (grp->sv2);
		607	grp->sv2 = 0;
		608
		609	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		610	req_cancel (sub);
		611	}
		612
		613	static void req_cancel (aio_req req)
		614	{
		615	req->flags |= FLAG_CANCELLED;
		616
		617	req_cancel_subs (req);
		618	}
		619
		620	static void *aio_proc(void *arg);
		621
		622	static void start_thread (void)
		623	{
		624	sigset_t fullsigset, oldsigset;
		625	pthread_attr_t attr;
		626
		627	worker *wrk = calloc (1, sizeof (worker));
		628
		629	if (!wrk)
		630	croak ("unable to allocate worker thread data");
		631
		632	pthread_attr_init (&attr);
		633	pthread_attr_setstacksize (&attr, STACKSIZE);
		634	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		635	#ifdef PTHREAD_SCOPE_PROCESS
		636	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		637	#endif
		638
		639	sigfillset (&fullsigset);
		640
		641	LOCK (wrklock);
		642	pthread_sigmask (SIG_SETMASK, &fullsigset, &oldsigset);
		643
		644	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
120	{	645	{
		646	wrk->prev = &wrk_first;
		647	wrk->next = wrk_first.next;
		648	wrk_first.next->prev = wrk;
		649	wrk_first.next = wrk;
		650	++started;
		651	}
		652	else
		653	free (wrk);
		654
		655	pthread_sigmask (SIG_SETMASK, &oldsigset, 0);
		656	UNLOCK (wrklock);
		657	}
		658
		659	static void maybe_start_thread ()
		660	{
		661	if (get_nthreads () >= wanted)
		662	return;
		663
		664	/* todo: maybe use idle here, but might be less exact */
		665	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		666	return;
		667
		668	start_thread ();
		669	}
		670
		671	static void req_send (aio_req req)
		672	{
		673	block_sig ();
		674
		675	++nreqs;
		676
		677	LOCK (reqlock);
		678	++nready;
		679	reqq_push (&req_queue, req);
		680	pthread_cond_signal (&reqwait);
		681	UNLOCK (reqlock);
		682
		683	unblock_sig ();
		684
		685	maybe_start_thread ();
		686	}
		687
		688	static void end_thread (void)
		689	{
		690	aio_req req;
		691
		692	Newz (0, req, 1, aio_cb);
		693
		694	req->type = REQ_QUIT;
		695	req->pri = PRI_MAX + PRI_BIAS;
		696
		697	LOCK (reqlock);
		698	reqq_push (&req_queue, req);
		699	pthread_cond_signal (&reqwait);
		700	UNLOCK (reqlock);
		701
		702	LOCK (wrklock);
		703	--started;
		704	UNLOCK (wrklock);
		705	}
		706
		707	static void set_max_idle (int nthreads)
		708	{
		709	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		710	max_idle = nthreads <= 0 ? 1 : nthreads;
		711	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
		712	}
		713
		714	static void min_parallel (int nthreads)
		715	{
		716	if (wanted < nthreads)
		717	wanted = nthreads;
		718	}
		719
		720	static void max_parallel (int nthreads)
		721	{
		722	if (wanted > nthreads)
		723	wanted = nthreads;
		724
		725	while (started > wanted)
		726	end_thread ();
		727	}
		728
		729	static void poll_wait ()
		730	{
121	fd_set rfd;	731	fd_set rfd;
		732
		733	while (nreqs)
		734	{
		735	int size;
		736	if (WORDACCESS_UNSAFE) LOCK (reslock);
		737	size = res_queue.size;
		738	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		739
		740	if (size)
		741	return;
		742
		743	maybe_start_thread ();
		744
122	FD_ZERO(&rfd);	745	FD_ZERO(&rfd);
123	FD_SET(respipe [0], &rfd);	746	FD_SET(respipe [0], &rfd);
124		747
125	select (respipe [0] + 1, &rfd, 0, 0, 0);	748	select (respipe [0] + 1, &rfd, 0, 0, 0);
126	}	749	}
127	}	750	}
128		751
129	static int	752	static int poll_cb ()
130	poll_cb ()
131	{	753	{
132	dSP;	754	dSP;
133	int count = 0;	755	int count = 0;
		756	int maxreqs = max_poll_reqs;
134	int do_croak = 0;	757	int do_croak = 0;
		758	struct timeval tv_start, tv_now;
135	aio_req req;	759	aio_req req;
		760
		761	if (max_poll_time)
		762	gettimeofday (&tv_start, 0);
		763
		764	block_sig ();
136		765
137	for (;;)	766	for (;;)
138	{	767	{
139	pthread_mutex_lock (&reslock);	768	for (;;)
140	req = ress;
141
142	if (req)
143	{	769	{
144	ress = req->next;	770	maybe_start_thread ();
145		771
		772	LOCK (reslock);
		773	req = reqq_shift (&res_queue);
		774
146	if (!ress)	775	if (req)
147	{	776	{
		777	--npending;
		778
		779	if (!res_queue.size)
		780	{
148	/* read any signals sent by the worker threads */	781	/* read any signals sent by the worker threads */
149	char buf [32];	782	char buf [4];
150	while (read (respipe [0], buf, 32) == 32)	783	while (read (respipe [0], buf, 4) == 4)
		784	;
151	;	785	}
152
153	rese = 0;
154	}	786	}
155	}
156		787
157	pthread_mutex_unlock (&reslock);	788	UNLOCK (reslock);
158		789
159	if (!req)	790	if (!req)
160	break;	791	break;
161		792
162	nreqs--;	793	--nreqs;
163		794
164	if (req->type == REQ_QUIT)
165	started--;
166	else
167	{
168	int errorno = errno;
169	errno = req->errorno;
170
171	if (req->type == REQ_READ)	795	if (req->type == REQ_GROUP && req->size)
172	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
173
174	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
175	SvREADONLY_off (req->data);
176
177	if (req->statdata)
178	{	796	{
179	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	797	req->int1 = 1; /* mark request as delayed */
180	PL_laststatval = req->result;	798	continue;
181	PL_statcache = *(req->statdata);
182	}
183
184	ENTER;
185	PUSHMARK (SP);
186
187	if (req->type == REQ_READDIR)
188	{
189	SV *rv = &PL_sv_undef;
190
191	if (req->result >= 0)
192	{
193	char *buf = req->data2ptr;
194	AV *av = newAV ();
195
196	while (req->result)
197	{
198	SV *sv = newSVpv (buf, 0);
199
200	av_push (av, sv);
201	buf += SvCUR (sv) + 1;
202	req->result--;
203	}
204
205	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}
207
208	XPUSHs (rv);
209	}	799	}
210	else	800	else
211	{	801	{
212	XPUSHs (sv_2mortal (newSViv (req->result)));	802	if (!req_invoke (req))
213
214	if (req->type == REQ_OPEN)
215	{	803	{
216	/* convert fd to fh */
217	SV *fh;
218
219	PUTBACK;
220	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221	SPAGAIN;
222
223	fh = SvREFCNT_inc (POPs);
224
225	PUSHMARK (SP);
226	XPUSHs (sv_2mortal (fh));
227	}
228	}
229
230	if (SvOK (req->callback))
231	{
232	PUTBACK;
233	call_sv (req->callback, G_VOID | G_EVAL);
234	SPAGAIN;
235
236	if (SvTRUE (ERRSV))
237	{
238	free_req (req);	804	req_free (req);
		805	unblock_sig ();
239	croak (0);	806	croak (0);
240	}	807	}
		808
		809	count++;
241	}	810	}
242		811
243	LEAVE;	812	req_free (req);
244		813
245	errno = errorno;	814	if (maxreqs && !--maxreqs)
246	count++;	815	break;
		816
		817	if (max_poll_time)
		818	{
		819	gettimeofday (&tv_now, 0);
		820
		821	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
		822	break;
		823	}
247	}	824	}
248		825
249	free_req (req);	826	if (nreqs <= max_outstanding)
		827	break;
		828
		829	poll_wait ();
		830
		831	++maxreqs;
250	}	832	}
251		833
		834	unblock_sig ();
252	return count;	835	return count;
253	}
254
255	static void *aio_proc(void *arg);
256
257	static void
258	start_thread (void)
259	{
260	sigset_t fullsigset, oldsigset;
261	pthread_t tid;
262	pthread_attr_t attr;
263
264	pthread_attr_init (&attr);
265	pthread_attr_setstacksize (&attr, STACKSIZE);
266	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
267
268	sigfillset (&fullsigset);
269	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
270
271	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
272	started++;
273
274	sigprocmask (SIG_SETMASK, &oldsigset, 0);
275	}
276
277	static void
278	send_req (aio_req req)
279	{
280	while (started < wanted && nreqs >= started)
281	start_thread ();
282
283	nreqs++;
284
285	pthread_mutex_lock (&reqlock);
286
287	req->next = 0;
288
289	if (reqe)
290	{
291	reqe->next = req;
292	reqe = req;
293	}
294	else
295	reqe = reqs = req;
296
297	pthread_cond_signal (&reqwait);
298	pthread_mutex_unlock (&reqlock);
299
300	if (nreqs > max_outstanding)
301	for (;;)
302	{
303	poll_cb ();
304
305	if (nreqs <= max_outstanding)
306	break;
307
308	poll_wait ();
309	}
310	}
311
312	static void
313	end_thread (void)
314	{
315	aio_req req;
316	Newz (0, req, 1, aio_cb);
317	req->type = REQ_QUIT;
318
319	send_req (req);
320	}
321
322	static void min_parallel (int nthreads)
323	{
324	if (wanted < nthreads)
325	wanted = nthreads;
326	}
327
328	static void max_parallel (int nthreads)
329	{
330	int cur = started;
331
332	if (wanted > nthreads)
333	wanted = nthreads;
334
335	while (cur > wanted)
336	{
337	end_thread ();
338	cur--;
339	}
340
341	while (started > wanted)
342	{
343	poll_wait ();
344	poll_cb ();
345	}
346	}	836	}
347		837
348	static void create_pipe ()	838	static void create_pipe ()
349	{	839	{
350	if (pipe (respipe))	840	if (pipe (respipe))
…		…
369	* normal read/write by using a mutex. slows down execution a lot,	859	* normal read/write by using a mutex. slows down execution a lot,
370	* but that's your problem, not mine.	860	* but that's your problem, not mine.
371	*/	861	*/
372	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	862	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
373		863
374	static ssize_t	864	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
375	pread (int fd, void *buf, size_t count, off_t offset)
376	{	865	{
377	ssize_t res;	866	ssize_t res;
378	off_t ooffset;	867	off_t ooffset;
379		868
380	pthread_mutex_lock (&preadwritelock);	869	LOCK (preadwritelock);
381	ooffset = lseek (fd, 0, SEEK_CUR);	870	ooffset = lseek (fd, 0, SEEK_CUR);
382	lseek (fd, offset, SEEK_SET);	871	lseek (fd, offset, SEEK_SET);
383	res = read (fd, buf, count);	872	res = read (fd, buf, count);
384	lseek (fd, ooffset, SEEK_SET);	873	lseek (fd, ooffset, SEEK_SET);
385	pthread_mutex_unlock (&preadwritelock);	874	UNLOCK (preadwritelock);
386		875
387	return res;	876	return res;
388	}	877	}
389		878
390	static ssize_t
391	pwrite (int fd, void *buf, size_t count, off_t offset)	879	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
392	{	880	{
393	ssize_t res;	881	ssize_t res;
394	off_t ooffset;	882	off_t ooffset;
395		883
396	pthread_mutex_lock (&preadwritelock);	884	LOCK (preadwritelock);
397	ooffset = lseek (fd, 0, SEEK_CUR);	885	ooffset = lseek (fd, 0, SEEK_CUR);
398	lseek (fd, offset, SEEK_SET);	886	lseek (fd, offset, SEEK_SET);
399	res = write (fd, buf, count);	887	res = write (fd, buf, count);
400	lseek (fd, offset, SEEK_SET);	888	lseek (fd, offset, SEEK_SET);
401	pthread_mutex_unlock (&preadwritelock);	889	UNLOCK (preadwritelock);
402		890
403	return res;	891	return res;
404	}	892	}
405	#endif	893	#endif
406		894
407	#if !HAVE_FDATASYNC	895	#if !HAVE_FDATASYNC
408	# define fdatasync fsync	896	# define fdatasync fsync
409	#endif	897	#endif
410		898
411	#if !HAVE_READAHEAD	899	#if !HAVE_READAHEAD
412	# define readahead aio_readahead	900	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
413		901
414	static ssize_t	902	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
415	readahead (int fd, off_t offset, size_t count)
416	{	903	{
417	char readahead_buf[4096];	904	dBUF;
418		905
419	while (count > 0)	906	while (count > 0)
420	{	907	{
421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	908	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
422		909
423	pread (fd, readahead_buf, len, offset);	910	pread (fd, aio_buf, len, offset);
424	offset += len;	911	offset += len;
425	count -= len;	912	count -= len;
426	}	913	}
427		914
428	errno = 0;	915	errno = 0;
429	}	916	}
		917
430	#endif	918	#endif
431		919
432	#if !HAVE_READDIR_R	920	#if !HAVE_READDIR_R
433	# define readdir_r aio_readdir_r	921	# define readdir_r aio_readdir_r
434		922
435	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	923	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
436		924
437	static int
438	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	925	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
439	{	926	{
440	struct dirent *e;	927	struct dirent *e;
441	int errorno;	928	int errorno;
442		929
443	pthread_mutex_lock (&readdirlock);	930	LOCK (readdirlock);
444		931
445	e = readdir (dirp);	932	e = readdir (dirp);
446	errorno = errno;	933	errorno = errno;
447		934
448	if (e)	935	if (e)
…		…
451	strcpy (ent->d_name, e->d_name);	938	strcpy (ent->d_name, e->d_name);
452	}	939	}
453	else	940	else
454	*res = 0;	941	*res = 0;
455		942
456	pthread_mutex_unlock (&readdirlock);	943	UNLOCK (readdirlock);
457		944
458	errno = errorno;	945	errno = errorno;
459	return e ? 0 : -1;	946	return e ? 0 : -1;
460	}	947	}
461	#endif	948	#endif
462		949
463	/* sendfile always needs emulation */	950	/* sendfile always needs emulation */
464	static ssize_t
465	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	951	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
466	{	952	{
467	ssize_t res;	953	ssize_t res;
468		954
469	if (!count)	955	if (!count)
470	return 0;	956	return 0;
…		…
481	{	967	{
482	off_t sbytes;	968	off_t sbytes;
483	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	969	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
484		970
485	if (res < 0 && sbytes)	971	if (res < 0 && sbytes)
486	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	972	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
487	res = sbytes;	973	res = sbytes;
488	}	974	}
489		975
490	# elif __hpux	976	# elif __hpux
491	res = sendfile (ofd, ifd, offset, count, 0, 0);	977	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
519	#endif	1005	#endif
520	)	1006	)
521	)	1007	)
522	{	1008	{
523	/* emulate sendfile. this is a major pain in the ass */	1009	/* emulate sendfile. this is a major pain in the ass */
524	char buf[4096];	1010	dBUF;
		1011
525	res = 0;	1012	res = 0;
526		1013
527	while (count)	1014	while (count)
528	{	1015	{
529	ssize_t cnt;	1016	ssize_t cnt;
530		1017
531	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	1018	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
532		1019
533	if (cnt <= 0)	1020	if (cnt <= 0)
534	{	1021	{
535	if (cnt && !res) res = -1;	1022	if (cnt && !res) res = -1;
536	break;	1023	break;
537	}	1024	}
538		1025
539	cnt = write (ofd, buf, cnt);	1026	cnt = write (ofd, aio_buf, cnt);
540		1027
541	if (cnt <= 0)	1028	if (cnt <= 0)
542	{	1029	{
543	if (cnt && !res) res = -1;	1030	if (cnt && !res) res = -1;
544	break;	1031	break;
…		…
552		1039
553	return res;	1040	return res;
554	}	1041	}
555		1042
556	/* read a full directory */	1043	/* read a full directory */
557	static int	1044	static void scandir_ (aio_req req, worker *self)
558	scandir_ (const char *path, void **namesp)
559	{	1045	{
560	DIR *dirp = opendir (path);	1046	DIR *dirp;
561	union	1047	union
562	{	1048	{
563	struct dirent d;	1049	struct dirent d;
564	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	1050	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
565	} u;	1051	} *u;
566	struct dirent *entp;	1052	struct dirent *entp;
567	char *name, *names;	1053	char *name, *names;
568	int memlen = 4096;	1054	int memlen = 4096;
569	int memofs = 0;	1055	int memofs = 0;
570	int res = 0;	1056	int res = 0;
571	int errorno;	1057	int errorno;
572		1058
573	if (!dirp)	1059	LOCK (wrklock);
574	return -1;	1060	self->dirp = dirp = opendir (req->ptr1);
575		1061	self->dbuf = u = malloc (sizeof (*u));
		1062	req->flags |= FLAG_PTR2_FREE;
576	names = malloc (memlen);	1063	req->ptr2 = names = malloc (memlen);
		1064	UNLOCK (wrklock);
		1065
		1066	if (dirp && u && names)
		1067	for (;;)
		1068	{
		1069	errno = 0;
		1070	readdir_r (dirp, &u->d, &entp);
		1071
		1072	if (!entp)
		1073	break;
		1074
		1075	name = entp->d_name;
		1076
		1077	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1078	{
		1079	int len = strlen (name) + 1;
		1080
		1081	res++;
		1082
		1083	while (memofs + len > memlen)
		1084	{
		1085	memlen *= 2;
		1086	LOCK (wrklock);
		1087	req->ptr2 = names = realloc (names, memlen);
		1088	UNLOCK (wrklock);
		1089
		1090	if (!names)
		1091	break;
		1092	}
		1093
		1094	memcpy (names + memofs, name, len);
		1095	memofs += len;
		1096	}
		1097	}
		1098
		1099	if (errno)
		1100	res = -1;
		1101
		1102	req->result = res;
		1103	}
		1104
		1105	/*****************************************************************************/
		1106
		1107	static void *aio_proc (void *thr_arg)
		1108	{
		1109	aio_req req;
		1110	struct timespec ts;
		1111	worker *self = (worker *)thr_arg;
		1112
		1113	/* try to distribute timeouts somewhat evenly */
		1114	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1115	* (1000000000UL / 1024UL);
577		1116
578	for (;;)	1117	for (;;)
579	{	1118	{
580	errno = 0, readdir_r (dirp, &u.d, &entp);	1119	ts.tv_sec = time (0) + IDLE_TIMEOUT;
581		1120
582	if (!entp)	1121	LOCK (reqlock);
583	break;
584
585	name = entp->d_name;
586
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{
589	int len = strlen (name) + 1;
590
591	res++;
592
593	while (memofs + len > memlen)
594	{
595	memlen *= 2;
596	names = realloc (names, memlen);
597	if (!names)
598	break;
599	}
600
601	memcpy (names + memofs, name, len);
602	memofs += len;
603	}
604	}
605
606	errorno = errno;
607	closedir (dirp);
608
609	if (errorno)
610	{
611	free (names);
612	errno = errorno;
613	res = -1;
614	}
615
616	*namesp = (void *)names;
617	return res;
618	}
619
620	/*****************************************************************************/
621
622	static void *
623	aio_proc (void *thr_arg)
624	{
625	aio_req req;
626	int type;
627
628	do
629	{
630	pthread_mutex_lock (&reqlock);
631		1122
632	for (;;)	1123	for (;;)
633	{	1124	{
634	req = reqs;	1125	self->req = req = reqq_shift (&req_queue);
635
636	if (reqs)
637	{
638	reqs = reqs->next;
639	if (!reqs) reqe = 0;
640	}
641		1126
642	if (req)	1127	if (req)
643	break;	1128	break;
644		1129
		1130	++idle;
		1131
		1132	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1133	== ETIMEDOUT)
		1134	{
		1135	if (idle > max_idle)
		1136	{
		1137	--idle;
		1138	UNLOCK (reqlock);
		1139	LOCK (wrklock);
		1140	--started;
		1141	UNLOCK (wrklock);
		1142	goto quit;
		1143	}
		1144
		1145	/* we are allowed to idle, so do so without any timeout */
645	pthread_cond_wait (&reqwait, &reqlock);	1146	pthread_cond_wait (&reqwait, &reqlock);
		1147	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1148	}
		1149
		1150	--idle;
646	}	1151	}
647		1152
648	pthread_mutex_unlock (&reqlock);	1153	--nready;
		1154
		1155	UNLOCK (reqlock);
649		1156
650	errno = 0; /* strictly unnecessary */	1157	errno = 0; /* strictly unnecessary */
651		1158
652	type = req->type;	1159	if (!(req->flags & FLAG_CANCELLED))
653
654	switch (type)	1160	switch (req->type)
		1161	{
		1162	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
		1163	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
		1164
		1165	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
		1166	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
		1167
		1168	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
		1169	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
		1170	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
		1171
		1172	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
		1173	case REQ_CLOSE: req->result = close (req->int1); break;
		1174	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
		1175	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
		1176	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
		1177	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
		1178	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
		1179	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
		1180	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
		1181
		1182	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
		1183	case REQ_FSYNC: req->result = fsync (req->int1); break;
		1184	case REQ_READDIR: scandir_ (req, self); break;
		1185
		1186	case REQ_BUSY:
		1187	{
		1188	struct timeval tv;
		1189
		1190	tv.tv_sec = req->int1;
		1191	tv.tv_usec = req->int2;
		1192
		1193	req->result = select (0, 0, 0, 0, &tv);
		1194	}
		1195
		1196	case REQ_GROUP:
		1197	case REQ_NOP:
		1198	break;
		1199
		1200	case REQ_QUIT:
		1201	goto quit;
		1202
		1203	default:
		1204	req->result = ENOSYS;
		1205	break;
		1206	}
		1207
		1208	req->errorno = errno;
		1209
		1210	LOCK (reslock);
		1211
		1212	++npending;
		1213
		1214	if (!reqq_push (&res_queue, req))
655	{	1215	{
656	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
657	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
658
659	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
661
662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
665
666	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
667	case REQ_CLOSE: req->result = close (req->fd); break;
668	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
669	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
670	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
671
672	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
673	case REQ_FSYNC: req->result = fsync (req->fd); break;
674	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
675
676	case REQ_QUIT:
677	break;
678
679	default:
680	req->result = ENOSYS;
681	break;
682	}
683
684	req->errorno = errno;
685
686	pthread_mutex_lock (&reslock);
687
688	req->next = 0;
689
690	if (rese)
691	{
692	rese->next = req;
693	rese = req;
694	}
695	else
696	{
697	rese = ress = req;
698
699	/* write a dummy byte to the pipe so fh becomes ready */	1216	/* write a dummy byte to the pipe so fh becomes ready */
700	write (respipe [1], &respipe, 1);	1217	write (respipe [1], &respipe, 1);
		1218
		1219	/* optionally signal the main thread asynchronously */
		1220	if (main_sig)
		1221	pthread_kill (main_tid, main_sig);
701	}	1222	}
702		1223
703	pthread_mutex_unlock (&reslock);	1224	self->req = 0;
		1225	worker_clear (self);
		1226
		1227	UNLOCK (reslock);
704	}	1228	}
705	while (type != REQ_QUIT);	1229
		1230	quit:
		1231	LOCK (wrklock);
		1232	worker_free (self);
		1233	UNLOCK (wrklock);
706		1234
707	return 0;	1235	return 0;
708	}	1236	}
709		1237
710	/*****************************************************************************/	1238	/*****************************************************************************/
711		1239
712	static void atfork_prepare (void)	1240	static void atfork_prepare (void)
713	{	1241	{
714	pthread_mutex_lock (&reqlock);	1242	LOCK (wrklock);
715	pthread_mutex_lock (&reslock);	1243	LOCK (reqlock);
		1244	LOCK (reslock);
716	#if !HAVE_PREADWRITE	1245	#if !HAVE_PREADWRITE
717	pthread_mutex_lock (&preadwritelock);	1246	LOCK (preadwritelock);
718	#endif	1247	#endif
719	#if !HAVE_READDIR_R	1248	#if !HAVE_READDIR_R
720	pthread_mutex_lock (&readdirlock);	1249	LOCK (readdirlock);
721	#endif	1250	#endif
722	}	1251	}
723		1252
724	static void atfork_parent (void)	1253	static void atfork_parent (void)
725	{	1254	{
726	#if !HAVE_READDIR_R	1255	#if !HAVE_READDIR_R
727	pthread_mutex_unlock (&readdirlock);	1256	UNLOCK (readdirlock);
728	#endif	1257	#endif
729	#if !HAVE_PREADWRITE	1258	#if !HAVE_PREADWRITE
730	pthread_mutex_unlock (&preadwritelock);	1259	UNLOCK (preadwritelock);
731	#endif	1260	#endif
732	pthread_mutex_unlock (&reslock);	1261	UNLOCK (reslock);
733	pthread_mutex_unlock (&reqlock);	1262	UNLOCK (reqlock);
		1263	UNLOCK (wrklock);
734	}	1264	}
735		1265
736	static void atfork_child (void)	1266	static void atfork_child (void)
737	{	1267	{
738	aio_req prv;	1268	aio_req prv;
739		1269
740	started = 0;	1270	while (prv = reqq_shift (&req_queue))
		1271	req_free (prv);
741		1272
742	while (reqs)	1273	while (prv = reqq_shift (&res_queue))
		1274	req_free (prv);
		1275
		1276	while (wrk_first.next != &wrk_first)
743	{	1277	{
744	prv = reqs;	1278	worker *wrk = wrk_first.next;
745	reqs = prv->next;	1279
746	free_req (prv);	1280	if (wrk->req)
		1281	req_free (wrk->req);
		1282
		1283	worker_clear (wrk);
		1284	worker_free (wrk);
747	}	1285	}
748		1286
749	reqs = reqe = 0;	1287	started = 0;
750		1288	idle = 0;
751	while (ress)	1289	nreqs = 0;
752	{	1290	nready = 0;
753	prv = ress;	1291	npending = 0;
754	ress = prv->next;
755	free_req (prv);
756	}
757
758	ress = rese = 0;
759		1292
760	close (respipe [0]);	1293	close (respipe [0]);
761	close (respipe [1]);	1294	close (respipe [1]);
762	create_pipe ();	1295	create_pipe ();
763		1296
764	atfork_parent ();	1297	atfork_parent ();
765	}	1298	}
766		1299
767	#define dREQ \	1300	#define dREQ \
768	aio_req req; \	1301	aio_req req; \
		1302	int req_pri = next_pri; \
		1303	next_pri = DEFAULT_PRI + PRI_BIAS; \
769	\	1304	\
770	if (SvOK (callback) && !SvROK (callback)) \	1305	if (SvOK (callback) && !SvROK (callback)) \
771	croak ("clalback must be undef or of reference type"); \	1306	croak ("callback must be undef or of reference type"); \
772	\	1307	\
773	Newz (0, req, 1, aio_cb); \	1308	Newz (0, req, 1, aio_cb); \
774	if (!req) \	1309	if (!req) \
775	croak ("out of memory during aio_req allocation"); \	1310	croak ("out of memory during aio_req allocation"); \
776	\	1311	\
777	req->callback = newSVsv (callback);	1312	req->callback = newSVsv (callback); \
		1313	req->pri = req_pri
		1314
		1315	#define REQ_SEND \
		1316	req_send (req); \
		1317	\
		1318	if (GIMME_V != G_VOID) \
		1319	XPUSHs (req_sv (req, AIO_REQ_KLASS));
778		1320
779	MODULE = IO::AIO PACKAGE = IO::AIO	1321	MODULE = IO::AIO PACKAGE = IO::AIO
780		1322
781	PROTOTYPES: ENABLE	1323	PROTOTYPES: ENABLE
782		1324
783	BOOT:	1325	BOOT:
784	{	1326	{
		1327	HV *stash = gv_stashpv ("IO::AIO", 1);
		1328
		1329	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1330	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1331	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1332	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1333	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1334	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1335	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
		1336
785	create_pipe ();	1337	create_pipe ();
786	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1338	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
787	}	1339	}
788		1340
789	void	1341	void
790	min_parallel(nthreads)	1342	max_poll_reqs (int nreqs)
791	int nthreads
792	PROTOTYPE: $	1343	PROTOTYPE: $
		1344	CODE:
		1345	max_poll_reqs = nreqs;
793		1346
794	void	1347	void
795	max_parallel(nthreads)	1348	max_poll_time (double nseconds)
796	int nthreads
797	PROTOTYPE: $	1349	PROTOTYPE: $
		1350	CODE:
		1351	max_poll_time = nseconds * AIO_TICKS;
		1352
		1353	void
		1354	min_parallel (int nthreads)
		1355	PROTOTYPE: $
		1356
		1357	void
		1358	max_parallel (int nthreads)
		1359	PROTOTYPE: $
		1360
		1361	void
		1362	max_idle (int nthreads)
		1363	PROTOTYPE: $
		1364	CODE:
		1365	set_max_idle (nthreads);
798		1366
799	int	1367	int
800	max_outstanding(nreqs)	1368	max_outstanding (int maxreqs)
801	int nreqs	1369	PROTOTYPE: $
802	PROTOTYPE: $
803	CODE:	1370	CODE:
804	RETVAL = max_outstanding;	1371	RETVAL = max_outstanding;
805	max_outstanding = nreqs;	1372	max_outstanding = maxreqs;
		1373	OUTPUT:
		1374	RETVAL
806		1375
807	void	1376	void
808	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1377	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
809	SV * pathname	1378	SV8 * pathname
810	int flags	1379	int flags
811	int mode	1380	int mode
812	SV * callback	1381	SV * callback
813	PROTOTYPE: $$$;$	1382	PROTOTYPE: $$$;$
814	CODE:	1383	PPCODE:
815	{	1384	{
816	dREQ;	1385	dREQ;
817		1386
818	req->type = REQ_OPEN;	1387	req->type = REQ_OPEN;
819	req->data = newSVsv (pathname);	1388	req->sv1 = newSVsv (pathname);
820	req->dataptr = SvPVbyte_nolen (req->data);	1389	req->ptr1 = SvPVbyte_nolen (req->sv1);
821	req->fd = flags;	1390	req->int1 = flags;
822	req->mode = mode;	1391	req->mode = mode;
823		1392
824	send_req (req);	1393	REQ_SEND;
825	}	1394	}
826		1395
827	void	1396	void
828	aio_close(fh,callback=&PL_sv_undef)	1397	aio_close (fh,callback=&PL_sv_undef)
829	SV * fh	1398	SV * fh
830	SV * callback	1399	SV * callback
831	PROTOTYPE: $;$	1400	PROTOTYPE: $;$
832	ALIAS:	1401	ALIAS:
833	aio_close = REQ_CLOSE	1402	aio_close = REQ_CLOSE
834	aio_fsync = REQ_FSYNC	1403	aio_fsync = REQ_FSYNC
835	aio_fdatasync = REQ_FDATASYNC	1404	aio_fdatasync = REQ_FDATASYNC
836	CODE:	1405	PPCODE:
837	{	1406	{
838	dREQ;	1407	dREQ;
839		1408
840	req->type = ix;	1409	req->type = ix;
841	req->fh = newSVsv (fh);	1410	req->fh = newSVsv (fh);
842	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1411	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
843		1412
844	send_req (req);	1413	REQ_SEND (req);
845	}	1414	}
846		1415
847	void	1416	void
848	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1417	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
849	SV * fh	1418	SV * fh
850	UV offset	1419	UV offset
851	UV length	1420	UV length
852	SV * data	1421	SV8 * data
853	UV dataoffset	1422	UV dataoffset
854	SV * callback	1423	SV * callback
855	ALIAS:	1424	ALIAS:
856	aio_read = REQ_READ	1425	aio_read = REQ_READ
857	aio_write = REQ_WRITE	1426	aio_write = REQ_WRITE
858	PROTOTYPE: $$$$$;$	1427	PROTOTYPE: $$$$$;$
859	CODE:	1428	PPCODE:
860	{	1429	{
861	aio_req req;
862	STRLEN svlen;	1430	STRLEN svlen;
863	char *svptr = SvPVbyte (data, svlen);	1431	char *svptr = SvPVbyte (data, svlen);
864		1432
865	SvUPGRADE (data, SVt_PV);	1433	SvUPGRADE (data, SVt_PV);
866	SvPOK_on (data);	1434	SvPOK_on (data);
…		…
878	length = svlen - dataoffset;	1446	length = svlen - dataoffset;
879	}	1447	}
880	else	1448	else
881	{	1449	{
882	/* read: grow scalar as necessary */	1450	/* read: grow scalar as necessary */
883	svptr = SvGROW (data, length + dataoffset);	1451	svptr = SvGROW (data, length + dataoffset + 1);
884	}	1452	}
885		1453
886	if (length < 0)	1454	if (length < 0)
887	croak ("length must not be negative");	1455	croak ("length must not be negative");
888		1456
889	{	1457	{
890	dREQ;	1458	dREQ;
891		1459
892	req->type = ix;	1460	req->type = ix;
893	req->fh = newSVsv (fh);	1461	req->fh = newSVsv (fh);
894	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1462	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
895	: IoOFP (sv_2io (fh)));	1463	: IoOFP (sv_2io (fh)));
896	req->offset = offset;	1464	req->offs = offset;
897	req->length = length;	1465	req->size = length;
898	req->data = SvREFCNT_inc (data);	1466	req->sv1 = SvREFCNT_inc (data);
899	req->dataptr = (char *)svptr + dataoffset;	1467	req->ptr1 = (char *)svptr + dataoffset;
		1468	req->stroffset = dataoffset;
900		1469
901	if (!SvREADONLY (data))	1470	if (!SvREADONLY (data))
902	{	1471	{
903	SvREADONLY_on (data);	1472	SvREADONLY_on (data);
904	req->data2ptr = (void *)data;	1473	req->flags |= FLAG_SV1_RO_OFF;
905	}	1474	}
906		1475
907	send_req (req);	1476	REQ_SEND;
908	}	1477	}
909	}	1478	}
910		1479
911	void	1480	void
		1481	aio_readlink (path,callback=&PL_sv_undef)
		1482	SV8 * path
		1483	SV * callback
		1484	PROTOTYPE: $$;$
		1485	PPCODE:
		1486	{
		1487	SV *data;
		1488	dREQ;
		1489
		1490	data = newSV (NAME_MAX);
		1491	SvPOK_on (data);
		1492
		1493	req->type = REQ_READLINK;
		1494	req->fh = newSVsv (path);
		1495	req->ptr2 = SvPVbyte_nolen (req->fh);
		1496	req->sv1 = data;
		1497	req->ptr1 = SvPVbyte_nolen (data);
		1498
		1499	REQ_SEND;
		1500	}
		1501
		1502	void
912	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1503	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
913	SV * out_fh	1504	SV * out_fh
914	SV * in_fh	1505	SV * in_fh
915	UV in_offset	1506	UV in_offset
916	UV length	1507	UV length
917	SV * callback	1508	SV * callback
918	PROTOTYPE: $$$$;$	1509	PROTOTYPE: $$$$;$
919	CODE:	1510	PPCODE:
920	{	1511	{
921	dREQ;	1512	dREQ;
922		1513
923	req->type = REQ_SENDFILE;	1514	req->type = REQ_SENDFILE;
924	req->fh = newSVsv (out_fh);	1515	req->fh = newSVsv (out_fh);
925	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1516	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
926	req->fh2 = newSVsv (in_fh);	1517	req->sv2 = newSVsv (in_fh);
927	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1518	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
928	req->offset = in_offset;	1519	req->offs = in_offset;
929	req->length = length;	1520	req->size = length;
930		1521
931	send_req (req);	1522	REQ_SEND;
932	}	1523	}
933		1524
934	void	1525	void
935	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1526	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
936	SV * fh	1527	SV * fh
937	UV offset	1528	UV offset
938	IV length	1529	IV length
939	SV * callback	1530	SV * callback
940	PROTOTYPE: $$$;$	1531	PROTOTYPE: $$$;$
941	CODE:	1532	PPCODE:
942	{	1533	{
943	dREQ;	1534	dREQ;
944		1535
945	req->type = REQ_READAHEAD;	1536	req->type = REQ_READAHEAD;
946	req->fh = newSVsv (fh);	1537	req->fh = newSVsv (fh);
947	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1538	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
948	req->offset = offset;	1539	req->offs = offset;
949	req->length = length;	1540	req->size = length;
950		1541
951	send_req (req);	1542	REQ_SEND;
952	}	1543	}
953		1544
954	void	1545	void
955	aio_stat(fh_or_path,callback=&PL_sv_undef)	1546	aio_stat (fh_or_path,callback=&PL_sv_undef)
956	SV * fh_or_path	1547	SV8 * fh_or_path
957	SV * callback	1548	SV * callback
958	ALIAS:	1549	ALIAS:
959	aio_stat = REQ_STAT	1550	aio_stat = REQ_STAT
960	aio_lstat = REQ_LSTAT	1551	aio_lstat = REQ_LSTAT
961	CODE:	1552	PPCODE:
962	{	1553	{
963	dREQ;	1554	dREQ;
964		1555
965	New (0, req->statdata, 1, Stat_t);	1556	req->ptr2 = malloc (sizeof (Stat_t));
966	if (!req->statdata)	1557	if (!req->ptr2)
967	{	1558	{
968	free_req (req);	1559	req_free (req);
969	croak ("out of memory during aio_req->statdata allocation");	1560	croak ("out of memory during aio_stat statdata allocation");
970	}	1561	}
		1562
		1563	req->flags |= FLAG_PTR2_FREE;
971		1564
972	if (SvPOK (fh_or_path))	1565	if (SvPOK (fh_or_path))
973	{	1566	{
974	req->type = ix;	1567	req->type = ix;
975	req->data = newSVsv (fh_or_path);	1568	req->sv1 = newSVsv (fh_or_path);
976	req->dataptr = SvPVbyte_nolen (req->data);	1569	req->ptr1 = SvPVbyte_nolen (req->sv1);
977	}	1570	}
978	else	1571	else
979	{	1572	{
980	req->type = REQ_FSTAT;	1573	req->type = REQ_FSTAT;
981	req->fh = newSVsv (fh_or_path);	1574	req->fh = newSVsv (fh_or_path);
982	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1575	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
983	}	1576	}
984		1577
985	send_req (req);	1578	REQ_SEND;
986	}	1579	}
987		1580
988	void	1581	void
989	aio_unlink(pathname,callback=&PL_sv_undef)	1582	aio_unlink (pathname,callback=&PL_sv_undef)
990	SV * pathname	1583	SV8 * pathname
991	SV * callback	1584	SV * callback
992	ALIAS:	1585	ALIAS:
993	aio_unlink = REQ_UNLINK	1586	aio_unlink = REQ_UNLINK
994	aio_rmdir = REQ_RMDIR	1587	aio_rmdir = REQ_RMDIR
		1588	aio_readdir = REQ_READDIR
995	CODE:	1589	PPCODE:
996	{	1590	{
997	dREQ;	1591	dREQ;
998		1592
999	req->type = ix;	1593	req->type = ix;
1000	req->data = newSVsv (pathname);	1594	req->sv1 = newSVsv (pathname);
1001	req->dataptr = SvPVbyte_nolen (req->data);	1595	req->ptr1 = SvPVbyte_nolen (req->sv1);
1002
1003	send_req (req);
1004	}
1005		1596
		1597	REQ_SEND;
		1598	}
		1599
1006	void	1600	void
1007	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1601	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1008	SV * oldpath	1602	SV8 * oldpath
1009	SV * newpath	1603	SV8 * newpath
1010	SV * callback	1604	SV * callback
		1605	ALIAS:
		1606	aio_link = REQ_LINK
		1607	aio_symlink = REQ_SYMLINK
		1608	aio_rename = REQ_RENAME
1011	CODE:	1609	PPCODE:
1012	{	1610	{
1013	dREQ;	1611	dREQ;
1014		1612
1015	req->type = REQ_SYMLINK;	1613	req->type = ix;
1016	req->fh = newSVsv (oldpath);	1614	req->fh = newSVsv (oldpath);
1017	req->data2ptr = SvPVbyte_nolen (req->fh);	1615	req->ptr2 = SvPVbyte_nolen (req->fh);
1018	req->data = newSVsv (newpath);	1616	req->sv1 = newSVsv (newpath);
1019	req->dataptr = SvPVbyte_nolen (req->data);	1617	req->ptr1 = SvPVbyte_nolen (req->sv1);
1020		1618
1021	send_req (req);	1619	REQ_SEND;
1022	}	1620	}
1023		1621
1024	void	1622	void
1025	aio_readdir(pathname,callback=&PL_sv_undef)	1623	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1026	SV * pathname	1624	SV8 * pathname
1027	SV * callback	1625	SV * callback
		1626	UV mode
		1627	UV dev
1028	CODE:	1628	PPCODE:
1029	{	1629	{
1030	dREQ;	1630	dREQ;
1031		1631
1032	req->type = REQ_READDIR;	1632	req->type = REQ_MKNOD;
1033	req->data = newSVsv (pathname);	1633	req->sv1 = newSVsv (pathname);
1034	req->dataptr = SvPVbyte_nolen (req->data);	1634	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1635	req->mode = (mode_t)mode;
		1636	req->offs = dev;
1035		1637
1036	send_req (req);	1638	REQ_SEND;
1037	}	1639	}
1038		1640
1039	void	1641	void
		1642	aio_busy (delay,callback=&PL_sv_undef)
		1643	double delay
		1644	SV * callback
		1645	PPCODE:
		1646	{
		1647	dREQ;
		1648
		1649	req->type = REQ_BUSY;
		1650	req->int1 = delay < 0. ? 0 : delay;
		1651	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
		1652
		1653	REQ_SEND;
		1654	}
		1655
		1656	void
		1657	aio_group (callback=&PL_sv_undef)
		1658	SV * callback
		1659	PROTOTYPE: ;$
		1660	PPCODE:
		1661	{
		1662	dREQ;
		1663
		1664	req->type = REQ_GROUP;
		1665
		1666	req_send (req);
		1667	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1668	}
		1669
		1670	void
		1671	aio_nop (callback=&PL_sv_undef)
		1672	SV * callback
		1673	PPCODE:
		1674	{
		1675	dREQ;
		1676
		1677	req->type = REQ_NOP;
		1678
		1679	REQ_SEND;
		1680	}
		1681
		1682	int
		1683	aioreq_pri (int pri = 0)
		1684	PROTOTYPE: ;$
		1685	CODE:
		1686	RETVAL = next_pri - PRI_BIAS;
		1687	if (items > 0)
		1688	{
		1689	if (pri < PRI_MIN) pri = PRI_MIN;
		1690	if (pri > PRI_MAX) pri = PRI_MAX;
		1691	next_pri = pri + PRI_BIAS;
		1692	}
		1693	OUTPUT:
		1694	RETVAL
		1695
		1696	void
		1697	aioreq_nice (int nice = 0)
		1698	CODE:
		1699	nice = next_pri - nice;
		1700	if (nice < PRI_MIN) nice = PRI_MIN;
		1701	if (nice > PRI_MAX) nice = PRI_MAX;
		1702	next_pri = nice + PRI_BIAS;
		1703
		1704	void
1040	flush()	1705	flush ()
1041	PROTOTYPE:	1706	PROTOTYPE:
1042	CODE:	1707	CODE:
1043	while (nreqs)	1708	while (nreqs)
1044	{	1709	{
1045	poll_wait ();	1710	poll_wait ();
1046	poll_cb ();	1711	poll_cb ();
1047	}	1712	}
1048		1713
1049	void	1714	int
1050	poll()	1715	poll()
1051	PROTOTYPE:	1716	PROTOTYPE:
1052	CODE:	1717	CODE:
1053	if (nreqs)
1054	{
1055	poll_wait ();	1718	poll_wait ();
1056	poll_cb ();	1719	RETVAL = poll_cb ();
1057	}	1720	OUTPUT:
		1721	RETVAL
1058		1722
1059	int	1723	int
1060	poll_fileno()	1724	poll_fileno()
1061	PROTOTYPE:	1725	PROTOTYPE:
1062	CODE:	1726	CODE:
…		…
1074		1738
1075	void	1739	void
1076	poll_wait()	1740	poll_wait()
1077	PROTOTYPE:	1741	PROTOTYPE:
1078	CODE:	1742	CODE:
1079	if (nreqs)
1080	poll_wait ();	1743	poll_wait ();
		1744
		1745	void
		1746	setsig (int signum = SIGIO)
		1747	PROTOTYPE: ;$
		1748	CODE:
		1749	{
		1750	if (block_sig_level)
		1751	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
		1752
		1753	LOCK (reslock);
		1754	main_tid = pthread_self ();
		1755	main_sig = signum;
		1756	UNLOCK (reslock);
		1757
		1758	if (main_sig && npending)
		1759	pthread_kill (main_tid, main_sig);
		1760	}
		1761
		1762	void
		1763	aio_block (SV *cb)
		1764	PROTOTYPE: &
		1765	PPCODE:
		1766	{
		1767	int count;
		1768
		1769	block_sig ();
		1770	PUSHMARK (SP);
		1771	PUTBACK;
		1772	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
		1773	SPAGAIN;
		1774	unblock_sig ();
		1775
		1776	if (SvTRUE (ERRSV))
		1777	croak (0);
		1778
		1779	XSRETURN (count);
		1780	}
1081		1781
1082	int	1782	int
1083	nreqs()	1783	nreqs()
1084	PROTOTYPE:	1784	PROTOTYPE:
1085	CODE:	1785	CODE:
1086	RETVAL = nreqs;	1786	RETVAL = nreqs;
1087	OUTPUT:	1787	OUTPUT:
1088	RETVAL	1788	RETVAL
1089		1789
		1790	int
		1791	nready()
		1792	PROTOTYPE:
		1793	CODE:
		1794	RETVAL = get_nready ();
		1795	OUTPUT:
		1796	RETVAL
		1797
		1798	int
		1799	npending()
		1800	PROTOTYPE:
		1801	CODE:
		1802	RETVAL = get_npending ();
		1803	OUTPUT:
		1804	RETVAL
		1805
		1806	int
		1807	nthreads()
		1808	PROTOTYPE:
		1809	CODE:
		1810	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1811	RETVAL = started;
		1812	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1813	OUTPUT:
		1814	RETVAL
		1815
		1816	PROTOTYPES: DISABLE
		1817
		1818	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1819
		1820	void
		1821	cancel (aio_req_ornot req)
		1822	CODE:
		1823	req_cancel (req);
		1824
		1825	void
		1826	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1827	CODE:
		1828	SvREFCNT_dec (req->callback);
		1829	req->callback = newSVsv (callback);
		1830
		1831	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1832
		1833	void
		1834	add (aio_req grp, ...)
		1835	PPCODE:
		1836	{
		1837	int i;
		1838	aio_req req;
		1839
		1840	if (main_sig && !block_sig_level)
		1841	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
		1842
		1843	if (grp->int1 == 2)
		1844	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1845
		1846	for (i = 1; i < items; ++i )
		1847	{
		1848	if (GIMME_V != G_VOID)
		1849	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1850
		1851	req = SvAIO_REQ (ST (i));
		1852
		1853	if (req)
		1854	{
		1855	++grp->size;
		1856	req->grp = grp;
		1857
		1858	req->grp_prev = 0;
		1859	req->grp_next = grp->grp_first;
		1860
		1861	if (grp->grp_first)
		1862	grp->grp_first->grp_prev = req;
		1863
		1864	grp->grp_first = req;
		1865	}
		1866	}
		1867	}
		1868
		1869	void
		1870	cancel_subs (aio_req_ornot req)
		1871	CODE:
		1872	req_cancel_subs (req);
		1873
		1874	void
		1875	result (aio_req grp, ...)
		1876	CODE:
		1877	{
		1878	int i;
		1879	AV *av;
		1880
		1881	grp->errorno = errno;
		1882
		1883	av = newAV ();
		1884
		1885	for (i = 1; i < items; ++i )
		1886	av_push (av, newSVsv (ST (i)));
		1887
		1888	SvREFCNT_dec (grp->sv1);
		1889	grp->sv1 = (SV *)av;
		1890	}
		1891
		1892	void
		1893	errno (aio_req grp, int errorno = errno)
		1894	CODE:
		1895	grp->errorno = errorno;
		1896
		1897	void
		1898	limit (aio_req grp, int limit)
		1899	CODE:
		1900	grp->int2 = limit;
		1901	aio_grp_feed (grp);
		1902
		1903	void
		1904	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1905	CODE:
		1906	{
		1907	SvREFCNT_dec (grp->sv2);
		1908	grp->sv2 = newSVsv (callback);
		1909
		1910	if (grp->int2 <= 0)
		1911	grp->int2 = 2;
		1912
		1913	aio_grp_feed (grp);
		1914	}
		1915

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