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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 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
		52	/* used for struct dirent, AIX doesn't provide it */
		53	#ifndef NAME_MAX
		54	# define NAME_MAX 4096
		55	#endif
		56
		57	#ifndef PTHREAD_STACK_MIN
		58	/* care for broken platforms, e.g. windows */
		59	# define PTHREAD_STACK_MIN 16384
		60	#endif
		61
36	#if __ia64	62	#if __ia64
37	# define STACKSIZE 65536	63	# define STACKSIZE 65536
		64	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		65	# define STACKSIZE PTHREAD_STACK_MIN
38	#else	66	#else
39	# define STACKSIZE 8192	67	# define STACKSIZE 16384
40	#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 */
41		94
42	enum {	95	enum {
43	REQ_QUIT,	96	REQ_QUIT,
44	REQ_OPEN, REQ_CLOSE,	97	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,	98	REQ_READ, REQ_WRITE, REQ_READAHEAD,
46	REQ_SENDFILE,	99	REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	100	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
48	REQ_FSYNC, REQ_FDATASYNC,	101	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,	102	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
50	REQ_READDIR,	103	REQ_MKNOD, REQ_READDIR,
51	REQ_SYMLINK,	104	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
		105	REQ_GROUP, REQ_NOP,
		106	REQ_BUSY,
52	};	107	};
53		108
		109	#define AIO_REQ_KLASS "IO::AIO::REQ"
		110	#define AIO_GRP_KLASS "IO::AIO::GRP"
		111
54	typedef struct aio_cb {	112	typedef struct aio_cb
		113	{
55	struct aio_cb *volatile next;	114	struct aio_cb *volatile next;
56		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;
57	int type;	124	int type;
58		125	int int1, int2;
59	/* should receive a cleanup, with unions */	126	int errorno;
60	int fd, fd2;
61	off_t offset;
62	size_t length;
63	ssize_t result;
64	mode_t mode; /* open */	127	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70		128
71	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;
72	} aio_cb;	134	} aio_cb;
73		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
74	typedef aio_cb *aio_req;	142	typedef aio_cb *aio_req;
		143	typedef aio_cb *aio_req_ornot;
75		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
76	static int started, wanted;	202	static unsigned int started, idle, wanted;
77	static volatile int nreqs;	203
78	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;
79	static int respipe [2];	256	static int respipe [2];
80		257
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	258	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	259	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	260	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
84		261
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	262	#if WORDACCESS_UNSAFE
86	static volatile aio_req ress, rese; /* queue start, queue end */
87		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
88	static void free_req (aio_req req)	580	static void req_free (aio_req req)
89	{	581	{
90	if (req->data)
91	SvREFCNT_dec (req->data);
92
93	if (req->fh)	582	if (req->self)
		583	{
		584	sv_unmagic (req->self, PERL_MAGIC_ext);
		585	SvREFCNT_dec (req->self);
		586	}
		587
94	SvREFCNT_dec (req->fh);	588	SvREFCNT_dec (req->fh);
95		589	SvREFCNT_dec (req->sv1);
96	if (req->fh2)
97	SvREFCNT_dec (req->fh2);	590	SvREFCNT_dec (req->sv2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);	591	SvREFCNT_dec (req->callback);
104		592
105	if (req->type == REQ_READDIR && req->result >= 0)	593	if (req->flags & FLAG_PTR2_FREE)
106	free (req->data2ptr);	594	free (req->ptr2);
107		595
108	Safefree (req);	596	Safefree (req);
109	}	597	}
110		598
111	static void	599	static void req_cancel_subs (aio_req grp)
112	poll_wait ()
113	{	600	{
114	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)
115	{	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	{
116	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
117	FD_ZERO(&rfd);	745	FD_ZERO(&rfd);
118	FD_SET(respipe [0], &rfd);	746	FD_SET(respipe [0], &rfd);
119		747
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	748	select (respipe [0] + 1, &rfd, 0, 0, 0);
121	}	749	}
122	}	750	}
123		751
124	static int	752	static int poll_cb ()
125	poll_cb ()
126	{	753	{
127	dSP;	754	dSP;
128	int count = 0;	755	int count = 0;
		756	int maxreqs = max_poll_reqs;
129	int do_croak = 0;	757	int do_croak = 0;
		758	struct timeval tv_start, tv_now;
130	aio_req req;	759	aio_req req;
		760
		761	if (max_poll_time)
		762	gettimeofday (&tv_start, 0);
		763
		764	block_sig ();
131		765
132	for (;;)	766	for (;;)
133	{	767	{
134	pthread_mutex_lock (&reslock);	768	for (;;)
135	req = ress;
136
137	if (req)
138	{	769	{
139	ress = req->next;	770	maybe_start_thread ();
140		771
		772	LOCK (reslock);
		773	req = reqq_shift (&res_queue);
		774
141	if (!ress)	775	if (req)
142	{	776	{
		777	--npending;
		778
		779	if (!res_queue.size)
		780	{
143	/* read any signals sent by the worker threads */	781	/* read any signals sent by the worker threads */
144	char buf [32];	782	char buf [4];
145	while (read (respipe [0], buf, 32) == 32)	783	while (read (respipe [0], buf, 4) == 4)
		784	;
146	;	785	}
147
148	rese = 0;
149	}	786	}
150	}
151		787
152	pthread_mutex_unlock (&reslock);	788	UNLOCK (reslock);
153		789
154	if (!req)	790	if (!req)
155	break;	791	break;
156		792
157	nreqs--;	793	--nreqs;
158		794
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)	795	if (req->type == REQ_GROUP && req->size)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{	796	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	797	req->int1 = 1; /* mark request as delayed */
175	PL_laststatval = req->result;	798	continue;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}	799	}
205	else	800	else
206	{	801	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));	802	if (!req_invoke (req))
208
209	if (req->type == REQ_OPEN)
210	{	803	{
211	/* convert fd to fh */
212	SV *fh;
213
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}
223	}
224
225	if (SvOK (req->callback))
226	{
227	PUTBACK;
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230
231	if (SvTRUE (ERRSV))
232	{
233	free_req (req);	804	req_free (req);
		805	unblock_sig ();
234	croak (0);	806	croak (0);
235	}	807	}
		808
		809	count++;
236	}	810	}
237		811
238	LEAVE;	812	req_free (req);
239		813
240	errno = errorno;	814	if (maxreqs && !--maxreqs)
241	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	}
242	}	824	}
243		825
244	free_req (req);	826	if (nreqs <= max_outstanding)
		827	break;
		828
		829	poll_wait ();
		830
		831	++maxreqs;
245	}	832	}
246		833
		834	unblock_sig ();
247	return count;	835	return count;
248	}
249
250	static void *aio_proc(void *arg);
251
252	static void
253	start_thread (void)
254	{
255	sigset_t fullsigset, oldsigset;
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}
271
272	static void
273	send_req (aio_req req)
274	{
275	while (started < wanted && nreqs >= started)
276	start_thread ();
277
278	nreqs++;
279
280	pthread_mutex_lock (&reqlock);
281
282	req->next = 0;
283
284	if (reqe)
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}
306
307	static void
308	end_thread (void)
309	{
310	aio_req req;
311	Newz (0, req, 1, aio_cb);
312	req->type = REQ_QUIT;
313
314	send_req (req);
315	}
316
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}	836	}
342		837
343	static void create_pipe ()	838	static void create_pipe ()
344	{	839	{
345	if (pipe (respipe))	840	if (pipe (respipe))
…		…
364	* 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,
365	* but that's your problem, not mine.	860	* but that's your problem, not mine.
366	*/	861	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	862	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368		863
369	static ssize_t	864	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
370	pread (int fd, void *buf, size_t count, off_t offset)
371	{	865	{
372	ssize_t res;	866	ssize_t res;
373	off_t ooffset;	867	off_t ooffset;
374		868
375	pthread_mutex_lock (&preadwritelock);	869	LOCK (preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);	870	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);	871	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);	872	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);	873	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);	874	UNLOCK (preadwritelock);
381		875
382	return res;	876	return res;
383	}	877	}
384		878
385	static ssize_t
386	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)
387	{	880	{
388	ssize_t res;	881	ssize_t res;
389	off_t ooffset;	882	off_t ooffset;
390		883
391	pthread_mutex_lock (&preadwritelock);	884	LOCK (preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);	885	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);	886	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);	887	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);	888	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);	889	UNLOCK (preadwritelock);
397		890
398	return res;	891	return res;
399	}	892	}
400	#endif	893	#endif
401		894
402	#if !HAVE_FDATASYNC	895	#if !HAVE_FDATASYNC
403	# define fdatasync fsync	896	# define fdatasync fsync
404	#endif	897	#endif
405		898
406	#if !HAVE_READAHEAD	899	#if !HAVE_READAHEAD
407	# define readahead aio_readahead	900	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
408		901
409	static ssize_t	902	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
410	readahead (int fd, off_t offset, size_t count)
411	{	903	{
412	char readahead_buf[4096];	904	dBUF;
413		905
414	while (count > 0)	906	while (count > 0)
415	{	907	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	908	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
417		909
418	pread (fd, readahead_buf, len, offset);	910	pread (fd, aio_buf, len, offset);
419	offset += len;	911	offset += len;
420	count -= len;	912	count -= len;
421	}	913	}
422		914
423	errno = 0;	915	errno = 0;
424	}	916	}
		917
425	#endif	918	#endif
426		919
427	#if !HAVE_READDIR_R	920	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r	921	# define readdir_r aio_readdir_r
429		922
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	923	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431		924
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	925	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{	926	{
435	struct dirent *e;	927	struct dirent *e;
436	int errorno;	928	int errorno;
437		929
438	pthread_mutex_lock (&readdirlock);	930	LOCK (readdirlock);
439		931
440	e = readdir (dirp);	932	e = readdir (dirp);
441	errorno = errno;	933	errorno = errno;
442		934
443	if (e)	935	if (e)
…		…
446	strcpy (ent->d_name, e->d_name);	938	strcpy (ent->d_name, e->d_name);
447	}	939	}
448	else	940	else
449	*res = 0;	941	*res = 0;
450		942
451	pthread_mutex_unlock (&readdirlock);	943	UNLOCK (readdirlock);
452		944
453	errno = errorno;	945	errno = errorno;
454	return e ? 0 : -1;	946	return e ? 0 : -1;
455	}	947	}
456	#endif	948	#endif
457		949
458	/* sendfile always needs emulation */	950	/* sendfile always needs emulation */
459	static ssize_t
460	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)
461	{	952	{
462	ssize_t res;	953	ssize_t res;
463		954
464	if (!count)	955	if (!count)
465	return 0;	956	return 0;
…		…
476	{	967	{
477	off_t sbytes;	968	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	969	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479		970
480	if (res < 0 && sbytes)	971	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	972	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
482	res = sbytes;	973	res = sbytes;
483	}	974	}
484		975
485	# elif __hpux	976	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);	977	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
514	#endif	1005	#endif
515	)	1006	)
516	)	1007	)
517	{	1008	{
518	/* emulate sendfile. this is a major pain in the ass */	1009	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];	1010	dBUF;
		1011
520	res = 0;	1012	res = 0;
521		1013
522	while (count)	1014	while (count)
523	{	1015	{
524	ssize_t cnt;	1016	ssize_t cnt;
525		1017
526	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	1018	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
527		1019
528	if (cnt <= 0)	1020	if (cnt <= 0)
529	{	1021	{
530	if (cnt && !res) res = -1;	1022	if (cnt && !res) res = -1;
531	break;	1023	break;
532	}	1024	}
533		1025
534	cnt = write (ofd, buf, cnt);	1026	cnt = write (ofd, aio_buf, cnt);
535		1027
536	if (cnt <= 0)	1028	if (cnt <= 0)
537	{	1029	{
538	if (cnt && !res) res = -1;	1030	if (cnt && !res) res = -1;
539	break;	1031	break;
…		…
547		1039
548	return res;	1040	return res;
549	}	1041	}
550		1042
551	/* read a full directory */	1043	/* read a full directory */
552	static int	1044	static void scandir_ (aio_req req, worker *self)
553	scandir_ (const char *path, void **namesp)
554	{	1045	{
555	DIR *dirp = opendir (path);	1046	DIR *dirp;
556	union	1047	union
557	{	1048	{
558	struct dirent d;	1049	struct dirent d;
559	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	1050	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
560	} u;	1051	} *u;
561	struct dirent *entp;	1052	struct dirent *entp;
562	char *name, *names;	1053	char *name, *names;
563	int memlen = 4096;	1054	int memlen = 4096;
564	int memofs = 0;	1055	int memofs = 0;
565	int res = 0;	1056	int res = 0;
566	int errorno;	1057	int errorno;
567		1058
568	if (!dirp)	1059	LOCK (wrklock);
569	return -1;	1060	self->dirp = dirp = opendir (req->ptr1);
570		1061	self->dbuf = u = malloc (sizeof (*u));
		1062	req->flags |= FLAG_PTR2_FREE;
571	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);
572		1116
573	for (;;)	1117	for (;;)
574	{	1118	{
575	errno = 0, readdir_r (dirp, &u.d, &entp);	1119	ts.tv_sec = time (0) + IDLE_TIMEOUT;
576		1120
577	if (!entp)	1121	LOCK (reqlock);
578	break;
579
580	name = entp->d_name;
581
582	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
583	{
584	int len = strlen (name) + 1;
585
586	res++;
587
588	while (memofs + len > memlen)
589	{
590	memlen *= 2;
591	names = realloc (names, memlen);
592	if (!names)
593	break;
594	}
595
596	memcpy (names + memofs, name, len);
597	memofs += len;
598	}
599	}
600
601	errorno = errno;
602	closedir (dirp);
603
604	if (errorno)
605	{
606	free (names);
607	errno = errorno;
608	res = -1;
609	}
610
611	*namesp = (void *)names;
612	return res;
613	}
614
615	/*****************************************************************************/
616
617	static void *
618	aio_proc (void *thr_arg)
619	{
620	aio_req req;
621	int type;
622
623	do
624	{
625	pthread_mutex_lock (&reqlock);
626		1122
627	for (;;)	1123	for (;;)
628	{	1124	{
629	req = reqs;	1125	self->req = req = reqq_shift (&req_queue);
630
631	if (reqs)
632	{
633	reqs = reqs->next;
634	if (!reqs) reqe = 0;
635	}
636		1126
637	if (req)	1127	if (req)
638	break;	1128	break;
639		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 */
640	pthread_cond_wait (&reqwait, &reqlock);	1146	pthread_cond_wait (&reqwait, &reqlock);
		1147	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1148	}
		1149
		1150	--idle;
641	}	1151	}
642		1152
643	pthread_mutex_unlock (&reqlock);	1153	--nready;
		1154
		1155	UNLOCK (reqlock);
644		1156
645	errno = 0; /* strictly unnecessary */	1157	errno = 0; /* strictly unnecessary */
646		1158
647	type = req->type;	1159	if (!(req->flags & FLAG_CANCELLED))
648
649	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))
650	{	1215	{
651	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
652	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
653
654	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
655	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
656
657	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
658	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
659	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
660
661	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
662	case REQ_CLOSE: req->result = close (req->fd); break;
663	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
664	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
665	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
666
667	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
668	case REQ_FSYNC: req->result = fsync (req->fd); break;
669	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
670
671	case REQ_QUIT:
672	break;
673
674	default:
675	req->result = ENOSYS;
676	break;
677	}
678
679	req->errorno = errno;
680
681	pthread_mutex_lock (&reslock);
682
683	req->next = 0;
684
685	if (rese)
686	{
687	rese->next = req;
688	rese = req;
689	}
690	else
691	{
692	rese = ress = req;
693
694	/* write a dummy byte to the pipe so fh becomes ready */	1216	/* write a dummy byte to the pipe so fh becomes ready */
695	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);
696	}	1222	}
697		1223
698	pthread_mutex_unlock (&reslock);	1224	self->req = 0;
		1225	worker_clear (self);
		1226
		1227	UNLOCK (reslock);
699	}	1228	}
700	while (type != REQ_QUIT);	1229
		1230	quit:
		1231	LOCK (wrklock);
		1232	worker_free (self);
		1233	UNLOCK (wrklock);
701		1234
702	return 0;	1235	return 0;
703	}	1236	}
704		1237
705	/*****************************************************************************/	1238	/*****************************************************************************/
706		1239
707	static void atfork_prepare (void)	1240	static void atfork_prepare (void)
708	{	1241	{
709	pthread_mutex_lock (&reqlock);	1242	LOCK (wrklock);
710	pthread_mutex_lock (&reslock);	1243	LOCK (reqlock);
		1244	LOCK (reslock);
711	#if !HAVE_PREADWRITE	1245	#if !HAVE_PREADWRITE
712	pthread_mutex_lock (&preadwritelock);	1246	LOCK (preadwritelock);
713	#endif	1247	#endif
714	#if !HAVE_READDIR_R	1248	#if !HAVE_READDIR_R
715	pthread_mutex_lock (&readdirlock);	1249	LOCK (readdirlock);
716	#endif	1250	#endif
717	}	1251	}
718		1252
719	static void atfork_parent (void)	1253	static void atfork_parent (void)
720	{	1254	{
721	#if !HAVE_READDIR_R	1255	#if !HAVE_READDIR_R
722	pthread_mutex_unlock (&readdirlock);	1256	UNLOCK (readdirlock);
723	#endif	1257	#endif
724	#if !HAVE_PREADWRITE	1258	#if !HAVE_PREADWRITE
725	pthread_mutex_unlock (&preadwritelock);	1259	UNLOCK (preadwritelock);
726	#endif	1260	#endif
727	pthread_mutex_unlock (&reslock);	1261	UNLOCK (reslock);
728	pthread_mutex_unlock (&reqlock);	1262	UNLOCK (reqlock);
		1263	UNLOCK (wrklock);
729	}	1264	}
730		1265
731	static void atfork_child (void)	1266	static void atfork_child (void)
732	{	1267	{
733	aio_req prv;	1268	aio_req prv;
734		1269
735	started = 0;	1270	while (prv = reqq_shift (&req_queue))
		1271	req_free (prv);
736		1272
737	while (reqs)	1273	while (prv = reqq_shift (&res_queue))
		1274	req_free (prv);
		1275
		1276	while (wrk_first.next != &wrk_first)
738	{	1277	{
739	prv = reqs;	1278	worker *wrk = wrk_first.next;
740	reqs = prv->next;	1279
741	free_req (prv);	1280	if (wrk->req)
		1281	req_free (wrk->req);
		1282
		1283	worker_clear (wrk);
		1284	worker_free (wrk);
742	}	1285	}
743		1286
744	reqs = reqe = 0;	1287	started = 0;
745		1288	idle = 0;
746	while (ress)	1289	nreqs = 0;
747	{	1290	nready = 0;
748	prv = ress;	1291	npending = 0;
749	ress = prv->next;
750	free_req (prv);
751	}
752
753	ress = rese = 0;
754		1292
755	close (respipe [0]);	1293	close (respipe [0]);
756	close (respipe [1]);	1294	close (respipe [1]);
757	create_pipe ();	1295	create_pipe ();
758		1296
759	atfork_parent ();	1297	atfork_parent ();
760	}	1298	}
761		1299
762	#define dREQ \	1300	#define dREQ \
763	aio_req req; \	1301	aio_req req; \
		1302	int req_pri = next_pri; \
		1303	next_pri = DEFAULT_PRI + PRI_BIAS; \
764	\	1304	\
765	if (SvOK (callback) && !SvROK (callback)) \	1305	if (SvOK (callback) && !SvROK (callback)) \
766	croak ("clalback must be undef or of reference type"); \	1306	croak ("callback must be undef or of reference type"); \
767	\	1307	\
768	Newz (0, req, 1, aio_cb); \	1308	Newz (0, req, 1, aio_cb); \
769	if (!req) \	1309	if (!req) \
770	croak ("out of memory during aio_req allocation"); \	1310	croak ("out of memory during aio_req allocation"); \
771	\	1311	\
772	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));
773		1320
774	MODULE = IO::AIO PACKAGE = IO::AIO	1321	MODULE = IO::AIO PACKAGE = IO::AIO
775		1322
776	PROTOTYPES: ENABLE	1323	PROTOTYPES: ENABLE
777		1324
778	BOOT:	1325	BOOT:
779	{	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
780	create_pipe ();	1337	create_pipe ();
781	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1338	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
782	}	1339	}
783		1340
784	void	1341	void
785	min_parallel(nthreads)	1342	max_poll_reqs (int nreqs)
786	int nthreads
787	PROTOTYPE: $	1343	PROTOTYPE: $
		1344	CODE:
		1345	max_poll_reqs = nreqs;
788		1346
789	void	1347	void
790	max_parallel(nthreads)	1348	max_poll_time (double nseconds)
791	int nthreads
792	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);
793		1366
794	int	1367	int
795	max_outstanding(nreqs)	1368	max_outstanding (int maxreqs)
796	int nreqs	1369	PROTOTYPE: $
797	PROTOTYPE: $
798	CODE:	1370	CODE:
799	RETVAL = max_outstanding;	1371	RETVAL = max_outstanding;
800	max_outstanding = nreqs;	1372	max_outstanding = maxreqs;
		1373	OUTPUT:
		1374	RETVAL
801		1375
802	void	1376	void
803	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1377	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
804	SV * pathname	1378	SV8 * pathname
805	int flags	1379	int flags
806	int mode	1380	int mode
807	SV * callback	1381	SV * callback
808	PROTOTYPE: $$$;$	1382	PROTOTYPE: $$$;$
809	CODE:	1383	PPCODE:
810	{	1384	{
811	dREQ;	1385	dREQ;
812		1386
813	req->type = REQ_OPEN;	1387	req->type = REQ_OPEN;
814	req->data = newSVsv (pathname);	1388	req->sv1 = newSVsv (pathname);
815	req->dataptr = SvPVbyte_nolen (req->data);	1389	req->ptr1 = SvPVbyte_nolen (req->sv1);
816	req->fd = flags;	1390	req->int1 = flags;
817	req->mode = mode;	1391	req->mode = mode;
818		1392
819	send_req (req);	1393	REQ_SEND;
820	}	1394	}
821		1395
822	void	1396	void
823	aio_close(fh,callback=&PL_sv_undef)	1397	aio_close (fh,callback=&PL_sv_undef)
824	SV * fh	1398	SV * fh
825	SV * callback	1399	SV * callback
826	PROTOTYPE: $;$	1400	PROTOTYPE: $;$
827	ALIAS:	1401	ALIAS:
828	aio_close = REQ_CLOSE	1402	aio_close = REQ_CLOSE
829	aio_fsync = REQ_FSYNC	1403	aio_fsync = REQ_FSYNC
830	aio_fdatasync = REQ_FDATASYNC	1404	aio_fdatasync = REQ_FDATASYNC
831	CODE:	1405	PPCODE:
832	{	1406	{
833	dREQ;	1407	dREQ;
834		1408
835	req->type = ix;	1409	req->type = ix;
836	req->fh = newSVsv (fh);	1410	req->fh = newSVsv (fh);
837	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1411	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
838		1412
839	send_req (req);	1413	REQ_SEND (req);
840	}	1414	}
841		1415
842	void	1416	void
843	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1417	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
844	SV * fh	1418	SV * fh
845	UV offset	1419	UV offset
846	UV length	1420	UV length
847	SV * data	1421	SV8 * data
848	UV dataoffset	1422	UV dataoffset
849	SV * callback	1423	SV * callback
850	ALIAS:	1424	ALIAS:
851	aio_read = REQ_READ	1425	aio_read = REQ_READ
852	aio_write = REQ_WRITE	1426	aio_write = REQ_WRITE
853	PROTOTYPE: $$$$$;$	1427	PROTOTYPE: $$$$$;$
854	CODE:	1428	PPCODE:
855	{	1429	{
856	aio_req req;
857	STRLEN svlen;	1430	STRLEN svlen;
858	char *svptr = SvPVbyte (data, svlen);	1431	char *svptr = SvPVbyte (data, svlen);
859		1432
860	SvUPGRADE (data, SVt_PV);	1433	SvUPGRADE (data, SVt_PV);
861	SvPOK_on (data);	1434	SvPOK_on (data);
…		…
873	length = svlen - dataoffset;	1446	length = svlen - dataoffset;
874	}	1447	}
875	else	1448	else
876	{	1449	{
877	/* read: grow scalar as necessary */	1450	/* read: grow scalar as necessary */
878	svptr = SvGROW (data, length + dataoffset);	1451	svptr = SvGROW (data, length + dataoffset + 1);
879	}	1452	}
880		1453
881	if (length < 0)	1454	if (length < 0)
882	croak ("length must not be negative");	1455	croak ("length must not be negative");
883		1456
884	{	1457	{
885	dREQ;	1458	dREQ;
886		1459
887	req->type = ix;	1460	req->type = ix;
888	req->fh = newSVsv (fh);	1461	req->fh = newSVsv (fh);
889	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1462	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
890	: IoOFP (sv_2io (fh)));	1463	: IoOFP (sv_2io (fh)));
891	req->offset = offset;	1464	req->offs = offset;
892	req->length = length;	1465	req->size = length;
893	req->data = SvREFCNT_inc (data);	1466	req->sv1 = SvREFCNT_inc (data);
894	req->dataptr = (char *)svptr + dataoffset;	1467	req->ptr1 = (char *)svptr + dataoffset;
		1468	req->stroffset = dataoffset;
895		1469
896	if (!SvREADONLY (data))	1470	if (!SvREADONLY (data))
897	{	1471	{
898	SvREADONLY_on (data);	1472	SvREADONLY_on (data);
899	req->data2ptr = (void *)data;	1473	req->flags |= FLAG_SV1_RO_OFF;
900	}	1474	}
901		1475
902	send_req (req);	1476	REQ_SEND;
903	}	1477	}
904	}	1478	}
905		1479
906	void	1480	void
		1481	aio_readlink (path,callback=&PL_sv_undef)
		1482	SV8 * path
		1483	SV * callback
		1484	PROTOTYPE: $$;$
		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
907	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)
908	SV * out_fh	1504	SV * out_fh
909	SV * in_fh	1505	SV * in_fh
910	UV in_offset	1506	UV in_offset
911	UV length	1507	UV length
912	SV * callback	1508	SV * callback
913	PROTOTYPE: $$$$;$	1509	PROTOTYPE: $$$$;$
914	CODE:	1510	PPCODE:
915	{	1511	{
916	dREQ;	1512	dREQ;
917		1513
918	req->type = REQ_SENDFILE;	1514	req->type = REQ_SENDFILE;
919	req->fh = newSVsv (out_fh);	1515	req->fh = newSVsv (out_fh);
920	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1516	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
921	req->fh2 = newSVsv (in_fh);	1517	req->sv2 = newSVsv (in_fh);
922	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1518	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
923	req->offset = in_offset;	1519	req->offs = in_offset;
924	req->length = length;	1520	req->size = length;
925		1521
926	send_req (req);	1522	REQ_SEND;
927	}	1523	}
928		1524
929	void	1525	void
930	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1526	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
931	SV * fh	1527	SV * fh
932	UV offset	1528	UV offset
933	IV length	1529	IV length
934	SV * callback	1530	SV * callback
935	PROTOTYPE: $$$;$	1531	PROTOTYPE: $$$;$
936	CODE:	1532	PPCODE:
937	{	1533	{
938	dREQ;	1534	dREQ;
939		1535
940	req->type = REQ_READAHEAD;	1536	req->type = REQ_READAHEAD;
941	req->fh = newSVsv (fh);	1537	req->fh = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1538	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
943	req->offset = offset;	1539	req->offs = offset;
944	req->length = length;	1540	req->size = length;
945		1541
946	send_req (req);	1542	REQ_SEND;
947	}	1543	}
948		1544
949	void	1545	void
950	aio_stat(fh_or_path,callback=&PL_sv_undef)	1546	aio_stat (fh_or_path,callback=&PL_sv_undef)
951	SV * fh_or_path	1547	SV8 * fh_or_path
952	SV * callback	1548	SV * callback
953	ALIAS:	1549	ALIAS:
954	aio_stat = REQ_STAT	1550	aio_stat = REQ_STAT
955	aio_lstat = REQ_LSTAT	1551	aio_lstat = REQ_LSTAT
956	CODE:	1552	PPCODE:
957	{	1553	{
958	dREQ;	1554	dREQ;
959		1555
960	New (0, req->statdata, 1, Stat_t);	1556	req->ptr2 = malloc (sizeof (Stat_t));
961	if (!req->statdata)	1557	if (!req->ptr2)
962	{	1558	{
963	free_req (req);	1559	req_free (req);
964	croak ("out of memory during aio_req->statdata allocation");	1560	croak ("out of memory during aio_stat statdata allocation");
965	}	1561	}
		1562
		1563	req->flags |= FLAG_PTR2_FREE;
966		1564
967	if (SvPOK (fh_or_path))	1565	if (SvPOK (fh_or_path))
968	{	1566	{
969	req->type = ix;	1567	req->type = ix;
970	req->data = newSVsv (fh_or_path);	1568	req->sv1 = newSVsv (fh_or_path);
971	req->dataptr = SvPVbyte_nolen (req->data);	1569	req->ptr1 = SvPVbyte_nolen (req->sv1);
972	}	1570	}
973	else	1571	else
974	{	1572	{
975	req->type = REQ_FSTAT;	1573	req->type = REQ_FSTAT;
976	req->fh = newSVsv (fh_or_path);	1574	req->fh = newSVsv (fh_or_path);
977	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1575	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
978	}	1576	}
979		1577
980	send_req (req);	1578	REQ_SEND;
981	}	1579	}
982		1580
983	void	1581	void
984	aio_unlink(pathname,callback=&PL_sv_undef)	1582	aio_unlink (pathname,callback=&PL_sv_undef)
985	SV * pathname	1583	SV8 * pathname
986	SV * callback	1584	SV * callback
987	ALIAS:	1585	ALIAS:
988	aio_unlink = REQ_UNLINK	1586	aio_unlink = REQ_UNLINK
989	aio_rmdir = REQ_RMDIR	1587	aio_rmdir = REQ_RMDIR
		1588	aio_readdir = REQ_READDIR
990	CODE:	1589	PPCODE:
991	{	1590	{
992	dREQ;	1591	dREQ;
993		1592
994	req->type = ix;	1593	req->type = ix;
995	req->data = newSVsv (pathname);	1594	req->sv1 = newSVsv (pathname);
996	req->dataptr = SvPVbyte_nolen (req->data);	1595	req->ptr1 = SvPVbyte_nolen (req->sv1);
997
998	send_req (req);
999	}
1000		1596
		1597	REQ_SEND;
		1598	}
		1599
1001	void	1600	void
1002	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1601	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1003	SV * oldpath	1602	SV8 * oldpath
1004	SV * newpath	1603	SV8 * newpath
1005	SV * callback	1604	SV * callback
		1605	ALIAS:
		1606	aio_link = REQ_LINK
		1607	aio_symlink = REQ_SYMLINK
		1608	aio_rename = REQ_RENAME
1006	CODE:	1609	PPCODE:
1007	{	1610	{
1008	dREQ;	1611	dREQ;
1009		1612
1010	req->type = REQ_SYMLINK;	1613	req->type = ix;
1011	req->fh = newSVsv (oldpath);	1614	req->fh = newSVsv (oldpath);
1012	req->data2ptr = SvPVbyte_nolen (req->fh);	1615	req->ptr2 = SvPVbyte_nolen (req->fh);
1013	req->data = newSVsv (newpath);	1616	req->sv1 = newSVsv (newpath);
1014	req->dataptr = SvPVbyte_nolen (req->data);	1617	req->ptr1 = SvPVbyte_nolen (req->sv1);
1015		1618
1016	send_req (req);	1619	REQ_SEND;
1017	}	1620	}
1018		1621
1019	void	1622	void
1020	aio_readdir(pathname,callback=&PL_sv_undef)	1623	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1021	SV * pathname	1624	SV8 * pathname
1022	SV * callback	1625	SV * callback
		1626	UV mode
		1627	UV dev
1023	CODE:	1628	PPCODE:
1024	{	1629	{
1025	dREQ;	1630	dREQ;
1026		1631
1027	req->type = REQ_READDIR;	1632	req->type = REQ_MKNOD;
1028	req->data = newSVsv (pathname);	1633	req->sv1 = newSVsv (pathname);
1029	req->dataptr = SvPVbyte_nolen (req->data);	1634	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1635	req->mode = (mode_t)mode;
		1636	req->offs = dev;
1030		1637
1031	send_req (req);	1638	REQ_SEND;
1032	}	1639	}
1033		1640
1034	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
1035	flush()	1705	flush ()
1036	PROTOTYPE:	1706	PROTOTYPE:
1037	CODE:	1707	CODE:
1038	while (nreqs)	1708	while (nreqs)
1039	{	1709	{
1040	poll_wait ();	1710	poll_wait ();
1041	poll_cb ();	1711	poll_cb ();
1042	}	1712	}
1043		1713
1044	void	1714	int
1045	poll()	1715	poll()
1046	PROTOTYPE:	1716	PROTOTYPE:
1047	CODE:	1717	CODE:
1048	if (nreqs)
1049	{
1050	poll_wait ();	1718	poll_wait ();
1051	poll_cb ();	1719	RETVAL = poll_cb ();
1052	}	1720	OUTPUT:
		1721	RETVAL
1053		1722
1054	int	1723	int
1055	poll_fileno()	1724	poll_fileno()
1056	PROTOTYPE:	1725	PROTOTYPE:
1057	CODE:	1726	CODE:
…		…
1069		1738
1070	void	1739	void
1071	poll_wait()	1740	poll_wait()
1072	PROTOTYPE:	1741	PROTOTYPE:
1073	CODE:	1742	CODE:
1074	if (nreqs)
1075	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	}
1076		1781
1077	int	1782	int
1078	nreqs()	1783	nreqs()
1079	PROTOTYPE:	1784	PROTOTYPE:
1080	CODE:	1785	CODE:
1081	RETVAL = nreqs;	1786	RETVAL = nreqs;
1082	OUTPUT:	1787	OUTPUT:
1083	RETVAL	1788	RETVAL
1084		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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