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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.44 by root, Sat Oct 21 23:20:29 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>
13	#include <errno.h>	23	#include <errno.h>
		24	#include <sys/time.h>
		25	#include <sys/select.h>
14	#include <sys/types.h>	26	#include <sys/types.h>
15	#include <sys/stat.h>	27	#include <sys/stat.h>
16	#include <limits.h>	28	#include <limits.h>
17	#include <unistd.h>	29	#include <unistd.h>
18	#include <fcntl.h>	30	#include <fcntl.h>
…		…
32	# else	44	# else
33	# error sendfile support requested but not available	45	# error sendfile support requested but not available
34	# endif	46	# endif
35	#endif	47	#endif
36		48
		49	/* number of seconds after which idle threads exit */
		50	#define IDLE_TIMEOUT 10
		51
37	/* used for struct dirent, AIX doesn't provide it */	52	/* used for struct dirent, AIX doesn't provide it */
38	#ifndef NAME_MAX	53	#ifndef NAME_MAX
39	# define NAME_MAX 4096	54	# define NAME_MAX 4096
40	#endif	55	#endif
41		56
		57	#ifndef PTHREAD_STACK_MIN
		58	/* care for broken platforms, e.g. windows */
		59	# define PTHREAD_STACK_MIN 16384
		60	#endif
		61
42	#if __ia64	62	#if __ia64
43	# define STACKSIZE 65536	63	# define STACKSIZE 65536
		64	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		65	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	66	#else
45	# define STACKSIZE 8192	67	# define STACKSIZE 16384
46	#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 */
47		94
48	enum {	95	enum {
49	REQ_QUIT,	96	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	97	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	98	REQ_READ, REQ_WRITE, REQ_READAHEAD,
52	REQ_SENDFILE,	99	REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	100	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	101	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	102	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	103	REQ_MKNOD, REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	104	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
58	REQ_GROUP,	105	REQ_GROUP, REQ_NOP,
		106	REQ_BUSY,
59	};	107	};
60		108
61	#define AIO_REQ_KLASS "IO::AIO::REQ"	109	#define AIO_REQ_KLASS "IO::AIO::REQ"
62	#define AIO_GRP_KLASS "IO::AIO::GRP"	110	#define AIO_GRP_KLASS "IO::AIO::GRP"
63		111
64	typedef struct aio_cb	112	typedef struct aio_cb
65	{	113	{
66	struct aio_cb *grp, *grp_prev, *grp_next;
67
68	struct aio_cb *volatile next;	114	struct aio_cb *volatile next;
69		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;
		124	int type;
		125	int int1, int2;
		126	int errorno;
		127	mode_t mode; /* open */
		128
		129	unsigned char flags;
		130	unsigned char pri;
		131
70	SV *self; /* the perl counterpart of this request, if any */	132	SV *self; /* the perl counterpart of this request, if any */
71		133	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72	SV *data, *callback;
73	SV *fh, *fh2;
74	void *dataptr, *data2ptr;
75	Stat_t *statdata;
76	off_t offset;
77	size_t length;
78	ssize_t result;
79
80	int type;
81	int fd, fd2;
82	int errorno;
83	STRLEN dataoffset;
84	mode_t mode; /* open */
85	unsigned char cancelled;
86	} aio_cb;	134	} aio_cb;
		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	};
87		141
88	typedef aio_cb *aio_req;	142	typedef aio_cb *aio_req;
89	typedef aio_cb *aio_req_ornot;	143	typedef aio_cb *aio_req_ornot;
90	typedef aio_cb *aio_group;
91		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
92	static int started, wanted;	202	static unsigned int started, idle, wanted;
93	static volatile int nreqs;	203
94	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;
95	static int respipe [2];	256	static int respipe [2];
96		257
97	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	258	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
98	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	259	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
99	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	260	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
100		261
101	static volatile aio_req reqs, reqe; /* queue start, queue end */	262	#if WORDACCESS_UNSAFE
102	static volatile aio_req ress, rese; /* queue start, queue end */	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);
103		363
104	/* must be called at most once */	364	/* must be called at most once */
105	static SV *req_sv (aio_req req, const char *klass)	365	static SV *req_sv (aio_req req, const char *klass)
106	{	366	{
		367	if (!req->self)
		368	{
107	req->self = (SV *)newHV ();	369	req->self = (SV *)newHV ();
108	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	370	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		371	}
109		372
110	return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));	373	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
111	}	374	}
112		375
113	static aio_req SvAIO_REQ (SV *sv, const char *klass)	376	static aio_req SvAIO_REQ (SV *sv)
114	{	377	{
		378	MAGIC *mg;
		379
115	if (!sv_derived_from (sv, klass) || !SvROK (sv))	380	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
116	croak ("object of class %s expected", klass);	381	croak ("object of class " AIO_REQ_KLASS " expected");
117		382
118	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	383	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
119		384
120	return mg ? (aio_req)mg->mg_ptr : 0;	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);
121	}	578	}
122		579
123	static void req_free (aio_req req)	580	static void req_free (aio_req req)
124	{	581	{
125	if (req->self)	582	if (req->self)
126	{	583	{
127	sv_unmagic (req->self, PERL_MAGIC_ext);	584	sv_unmagic (req->self, PERL_MAGIC_ext);
128	SvREFCNT_dec (req->self);	585	SvREFCNT_dec (req->self);
129	}	586	}
130		587
131	if (req->data)
132	SvREFCNT_dec (req->data);
133
134	if (req->fh)
135	SvREFCNT_dec (req->fh);	588	SvREFCNT_dec (req->fh);
136		589	SvREFCNT_dec (req->sv1);
137	if (req->fh2)
138	SvREFCNT_dec (req->fh2);	590	SvREFCNT_dec (req->sv2);
139
140	if (req->statdata)
141	Safefree (req->statdata);
142
143	if (req->callback)
144	SvREFCNT_dec (req->callback);	591	SvREFCNT_dec (req->callback);
145		592
146	if (req->type == REQ_READDIR && req->result >= 0)	593	if (req->flags & FLAG_PTR2_FREE)
147	free (req->data2ptr);	594	free (req->ptr2);
148		595
149	Safefree (req);	596	Safefree (req);
150	}	597	}
151		598
152	static void	599	static void req_cancel_subs (aio_req grp)
153	poll_wait ()
154	{	600	{
155	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)
156	{	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	{
157	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
158	FD_ZERO(&rfd);	745	FD_ZERO(&rfd);
159	FD_SET(respipe [0], &rfd);	746	FD_SET(respipe [0], &rfd);
160		747
161	select (respipe [0] + 1, &rfd, 0, 0, 0);	748	select (respipe [0] + 1, &rfd, 0, 0, 0);
162	}	749	}
163	}	750	}
164		751
165	static int	752	static int poll_cb ()
166	poll_cb ()
167	{	753	{
168	dSP;	754	dSP;
169	int count = 0;	755	int count = 0;
		756	int maxreqs = max_poll_reqs;
170	int do_croak = 0;	757	int do_croak = 0;
		758	struct timeval tv_start, tv_now;
171	aio_req req;	759	aio_req req;
		760
		761	if (max_poll_time)
		762	gettimeofday (&tv_start, 0);
		763
		764	block_sig ();
172		765
173	for (;;)	766	for (;;)
174	{	767	{
175	pthread_mutex_lock (&reslock);	768	for (;;)
176	req = ress;
177
178	if (req)
179	{	769	{
180	ress = req->next;	770	maybe_start_thread ();
181		771
		772	LOCK (reslock);
		773	req = reqq_shift (&res_queue);
		774
182	if (!ress)	775	if (req)
183	{	776	{
		777	--npending;
		778
		779	if (!res_queue.size)
		780	{
184	/* read any signals sent by the worker threads */	781	/* read any signals sent by the worker threads */
185	char buf [32];	782	char buf [4];
186	while (read (respipe [0], buf, 32) == 32)	783	while (read (respipe [0], buf, 4) == 4)
		784	;
187	;	785	}
188
189	rese = 0;
190	}	786	}
191	}
192		787
193	pthread_mutex_unlock (&reslock);	788	UNLOCK (reslock);
194		789
195	if (!req)	790	if (!req)
196	break;	791	break;
197		792
198	nreqs--;	793	--nreqs;
199		794
200	if (req->type == REQ_QUIT)
201	started--;
202	else
203	{
204	int errorno = errno;
205	errno = req->errorno;
206
207	if (req->type == REQ_READ)	795	if (req->type == REQ_GROUP && req->size)
208	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
209
210	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
211	SvREADONLY_off (req->data);
212
213	if (req->statdata)
214	{	796	{
215	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	797	req->int1 = 1; /* mark request as delayed */
216	PL_laststatval = req->result;	798	continue;
217	PL_statcache = *(req->statdata);
218	}
219
220	ENTER;
221	PUSHMARK (SP);
222
223	if (req->type == REQ_READDIR)
224	{
225	SV *rv = &PL_sv_undef;
226
227	if (req->result >= 0)
228	{
229	char *buf = req->data2ptr;
230	AV *av = newAV ();
231
232	while (req->result)
233	{
234	SV *sv = newSVpv (buf, 0);
235
236	av_push (av, sv);
237	buf += SvCUR (sv) + 1;
238	req->result--;
239	}
240
241	rv = sv_2mortal (newRV_noinc ((SV *)av));
242	}
243
244	XPUSHs (rv);
245	}	799	}
246	else	800	else
247	{	801	{
248	XPUSHs (sv_2mortal (newSViv (req->result)));	802	if (!req_invoke (req))
249
250	if (req->type == REQ_OPEN)
251	{
252	/* convert fd to fh */
253	SV *fh;
254
255	PUTBACK;
256	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
257	SPAGAIN;
258
259	fh = SvREFCNT_inc (POPs);
260
261	PUSHMARK (SP);
262	XPUSHs (sv_2mortal (fh));
263	}
264	}
265
266	if (SvOK (req->callback) && !req->cancelled)
267	{
268	PUTBACK;
269	call_sv (req->callback, G_VOID | G_EVAL);
270	SPAGAIN;
271
272	if (SvTRUE (ERRSV))
273	{	803	{
274	req_free (req);	804	req_free (req);
		805	unblock_sig ();
275	croak (0);	806	croak (0);
276	}	807	}
		808
		809	count++;
277	}	810	}
278		811
279	LEAVE;	812	req_free (req);
280		813
281	errno = errorno;	814	if (maxreqs && !--maxreqs)
282	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	}
283	}	824	}
284		825
285	req_free (req);	826	if (nreqs <= max_outstanding)
		827	break;
		828
		829	poll_wait ();
		830
		831	++maxreqs;
286	}	832	}
287		833
		834	unblock_sig ();
288	return count;	835	return count;
289	}
290
291	static void *aio_proc(void *arg);
292
293	static void
294	start_thread (void)
295	{
296	sigset_t fullsigset, oldsigset;
297	pthread_t tid;
298	pthread_attr_t attr;
299
300	pthread_attr_init (&attr);
301	pthread_attr_setstacksize (&attr, STACKSIZE);
302	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
303
304	sigfillset (&fullsigset);
305	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
306
307	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
308	started++;
309
310	sigprocmask (SIG_SETMASK, &oldsigset, 0);
311	}
312
313	static void
314	req_send (aio_req req)
315	{
316	while (started < wanted && nreqs >= started)
317	start_thread ();
318
319	nreqs++;
320
321	pthread_mutex_lock (&reqlock);
322
323	req->next = 0;
324
325	if (reqe)
326	{
327	reqe->next = req;
328	reqe = req;
329	}
330	else
331	reqe = reqs = req;
332
333	pthread_cond_signal (&reqwait);
334	pthread_mutex_unlock (&reqlock);
335
336	if (nreqs > max_outstanding)
337	for (;;)
338	{
339	poll_cb ();
340
341	if (nreqs <= max_outstanding)
342	break;
343
344	poll_wait ();
345	}
346	}
347
348	static void
349	end_thread (void)
350	{
351	aio_req req;
352	Newz (0, req, 1, aio_cb);
353	req->type = REQ_QUIT;
354
355	req_send (req);
356	}
357
358	static void min_parallel (int nthreads)
359	{
360	if (wanted < nthreads)
361	wanted = nthreads;
362	}
363
364	static void max_parallel (int nthreads)
365	{
366	int cur = started;
367
368	if (wanted > nthreads)
369	wanted = nthreads;
370
371	while (cur > wanted)
372	{
373	end_thread ();
374	cur--;
375	}
376
377	while (started > wanted)
378	{
379	poll_wait ();
380	poll_cb ();
381	}
382	}	836	}
383		837
384	static void create_pipe ()	838	static void create_pipe ()
385	{	839	{
386	if (pipe (respipe))	840	if (pipe (respipe))
…		…
405	* 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,
406	* but that's your problem, not mine.	860	* but that's your problem, not mine.
407	*/	861	*/
408	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	862	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
409		863
410	static ssize_t	864	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
411	pread (int fd, void *buf, size_t count, off_t offset)
412	{	865	{
413	ssize_t res;	866	ssize_t res;
414	off_t ooffset;	867	off_t ooffset;
415		868
416	pthread_mutex_lock (&preadwritelock);	869	LOCK (preadwritelock);
417	ooffset = lseek (fd, 0, SEEK_CUR);	870	ooffset = lseek (fd, 0, SEEK_CUR);
418	lseek (fd, offset, SEEK_SET);	871	lseek (fd, offset, SEEK_SET);
419	res = read (fd, buf, count);	872	res = read (fd, buf, count);
420	lseek (fd, ooffset, SEEK_SET);	873	lseek (fd, ooffset, SEEK_SET);
421	pthread_mutex_unlock (&preadwritelock);	874	UNLOCK (preadwritelock);
422		875
423	return res;	876	return res;
424	}	877	}
425		878
426	static ssize_t
427	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)
428	{	880	{
429	ssize_t res;	881	ssize_t res;
430	off_t ooffset;	882	off_t ooffset;
431		883
432	pthread_mutex_lock (&preadwritelock);	884	LOCK (preadwritelock);
433	ooffset = lseek (fd, 0, SEEK_CUR);	885	ooffset = lseek (fd, 0, SEEK_CUR);
434	lseek (fd, offset, SEEK_SET);	886	lseek (fd, offset, SEEK_SET);
435	res = write (fd, buf, count);	887	res = write (fd, buf, count);
436	lseek (fd, offset, SEEK_SET);	888	lseek (fd, offset, SEEK_SET);
437	pthread_mutex_unlock (&preadwritelock);	889	UNLOCK (preadwritelock);
438		890
439	return res;	891	return res;
440	}	892	}
441	#endif	893	#endif
442		894
443	#if !HAVE_FDATASYNC	895	#if !HAVE_FDATASYNC
444	# define fdatasync fsync	896	# define fdatasync fsync
445	#endif	897	#endif
446		898
447	#if !HAVE_READAHEAD	899	#if !HAVE_READAHEAD
448	# define readahead aio_readahead	900	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
449		901
450	static ssize_t	902	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
451	readahead (int fd, off_t offset, size_t count)
452	{	903	{
453	char readahead_buf[4096];	904	dBUF;
454		905
455	while (count > 0)	906	while (count > 0)
456	{	907	{
457	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	908	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
458		909
459	pread (fd, readahead_buf, len, offset);	910	pread (fd, aio_buf, len, offset);
460	offset += len;	911	offset += len;
461	count -= len;	912	count -= len;
462	}	913	}
463		914
464	errno = 0;	915	errno = 0;
465	}	916	}
		917
466	#endif	918	#endif
467		919
468	#if !HAVE_READDIR_R	920	#if !HAVE_READDIR_R
469	# define readdir_r aio_readdir_r	921	# define readdir_r aio_readdir_r
470		922
471	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	923	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
472		924
473	static int
474	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	925	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
475	{	926	{
476	struct dirent *e;	927	struct dirent *e;
477	int errorno;	928	int errorno;
478		929
479	pthread_mutex_lock (&readdirlock);	930	LOCK (readdirlock);
480		931
481	e = readdir (dirp);	932	e = readdir (dirp);
482	errorno = errno;	933	errorno = errno;
483		934
484	if (e)	935	if (e)
…		…
487	strcpy (ent->d_name, e->d_name);	938	strcpy (ent->d_name, e->d_name);
488	}	939	}
489	else	940	else
490	*res = 0;	941	*res = 0;
491		942
492	pthread_mutex_unlock (&readdirlock);	943	UNLOCK (readdirlock);
493		944
494	errno = errorno;	945	errno = errorno;
495	return e ? 0 : -1;	946	return e ? 0 : -1;
496	}	947	}
497	#endif	948	#endif
498		949
499	/* sendfile always needs emulation */	950	/* sendfile always needs emulation */
500	static ssize_t
501	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)
502	{	952	{
503	ssize_t res;	953	ssize_t res;
504		954
505	if (!count)	955	if (!count)
506	return 0;	956	return 0;
…		…
517	{	967	{
518	off_t sbytes;	968	off_t sbytes;
519	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	969	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
520		970
521	if (res < 0 && sbytes)	971	if (res < 0 && sbytes)
522	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	972	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
523	res = sbytes;	973	res = sbytes;
524	}	974	}
525		975
526	# elif __hpux	976	# elif __hpux
527	res = sendfile (ofd, ifd, offset, count, 0, 0);	977	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
555	#endif	1005	#endif
556	)	1006	)
557	)	1007	)
558	{	1008	{
559	/* emulate sendfile. this is a major pain in the ass */	1009	/* emulate sendfile. this is a major pain in the ass */
560	char buf[4096];	1010	dBUF;
		1011
561	res = 0;	1012	res = 0;
562		1013
563	while (count)	1014	while (count)
564	{	1015	{
565	ssize_t cnt;	1016	ssize_t cnt;
566		1017
567	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	1018	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
568		1019
569	if (cnt <= 0)	1020	if (cnt <= 0)
570	{	1021	{
571	if (cnt && !res) res = -1;	1022	if (cnt && !res) res = -1;
572	break;	1023	break;
573	}	1024	}
574		1025
575	cnt = write (ofd, buf, cnt);	1026	cnt = write (ofd, aio_buf, cnt);
576		1027
577	if (cnt <= 0)	1028	if (cnt <= 0)
578	{	1029	{
579	if (cnt && !res) res = -1;	1030	if (cnt && !res) res = -1;
580	break;	1031	break;
…		…
588		1039
589	return res;	1040	return res;
590	}	1041	}
591		1042
592	/* read a full directory */	1043	/* read a full directory */
593	static int	1044	static void scandir_ (aio_req req, worker *self)
594	scandir_ (const char *path, void **namesp)
595	{	1045	{
596	DIR *dirp = opendir (path);	1046	DIR *dirp;
597	union	1047	union
598	{	1048	{
599	struct dirent d;	1049	struct dirent d;
600	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	1050	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
601	} u;	1051	} *u;
602	struct dirent *entp;	1052	struct dirent *entp;
603	char *name, *names;	1053	char *name, *names;
604	int memlen = 4096;	1054	int memlen = 4096;
605	int memofs = 0;	1055	int memofs = 0;
606	int res = 0;	1056	int res = 0;
607	int errorno;	1057	int errorno;
608		1058
609	if (!dirp)	1059	LOCK (wrklock);
610	return -1;	1060	self->dirp = dirp = opendir (req->ptr1);
611		1061	self->dbuf = u = malloc (sizeof (*u));
		1062	req->flags |= FLAG_PTR2_FREE;
612	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);
613		1116
614	for (;;)	1117	for (;;)
615	{	1118	{
616	errno = 0, readdir_r (dirp, &u.d, &entp);	1119	ts.tv_sec = time (0) + IDLE_TIMEOUT;
617		1120
618	if (!entp)	1121	LOCK (reqlock);
619	break;
620
621	name = entp->d_name;
622
623	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
624	{
625	int len = strlen (name) + 1;
626
627	res++;
628
629	while (memofs + len > memlen)
630	{
631	memlen *= 2;
632	names = realloc (names, memlen);
633	if (!names)
634	break;
635	}
636
637	memcpy (names + memofs, name, len);
638	memofs += len;
639	}
640	}
641
642	errorno = errno;
643	closedir (dirp);
644
645	if (errorno)
646	{
647	free (names);
648	errno = errorno;
649	res = -1;
650	}
651
652	*namesp = (void *)names;
653	return res;
654	}
655
656	/*****************************************************************************/
657
658	static void *
659	aio_proc (void *thr_arg)
660	{
661	aio_req req;
662	int type;
663
664	do
665	{
666	pthread_mutex_lock (&reqlock);
667		1122
668	for (;;)	1123	for (;;)
669	{	1124	{
670	req = reqs;	1125	self->req = req = reqq_shift (&req_queue);
671
672	if (reqs)
673	{
674	reqs = reqs->next;
675	if (!reqs) reqe = 0;
676	}
677		1126
678	if (req)	1127	if (req)
679	break;	1128	break;
680		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 */
681	pthread_cond_wait (&reqwait, &reqlock);	1146	pthread_cond_wait (&reqwait, &reqlock);
		1147	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1148	}
		1149
		1150	--idle;
682	}	1151	}
683		1152
684	pthread_mutex_unlock (&reqlock);	1153	--nready;
		1154
		1155	UNLOCK (reqlock);
685		1156
686	errno = 0; /* strictly unnecessary */	1157	errno = 0; /* strictly unnecessary */
687		1158
688	if (!req->cancelled)	1159	if (!(req->flags & FLAG_CANCELLED))
689	switch (req->type)	1160	switch (req->type)
690	{	1161	{
691	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1162	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
692	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1163	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
693		1164
694	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1165	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
695	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1166	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
696		1167
697	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1168	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
698	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1169	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
699	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1170	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
700		1171
701	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1172	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
702	case REQ_CLOSE: req->result = close (req->fd); break;	1173	case REQ_CLOSE: req->result = close (req->int1); break;
703	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1174	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
704	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1175	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
705	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1176	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
706	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1177	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
707	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); 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;
708		1181
709	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1182	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
710	case REQ_FSYNC: req->result = fsync (req->fd); break;	1183	case REQ_FSYNC: req->result = fsync (req->int1); break;
711	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); 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;
712		1199
713	case REQ_QUIT:	1200	case REQ_QUIT:
714	break;	1201	goto quit;
715		1202
716	default:	1203	default:
717	req->result = ENOSYS;	1204	req->result = ENOSYS;
718	break;	1205	break;
719	}	1206	}
720		1207
721	req->errorno = errno;	1208	req->errorno = errno;
722		1209
723	pthread_mutex_lock (&reslock);	1210	LOCK (reslock);
724		1211
725	req->next = 0;	1212	++npending;
726		1213
727	if (rese)	1214	if (!reqq_push (&res_queue, req))
728	{	1215	{
729	rese->next = req;
730	rese = req;
731	}
732	else
733	{
734	rese = ress = req;
735
736	/* write a dummy byte to the pipe so fh becomes ready */	1216	/* write a dummy byte to the pipe so fh becomes ready */
737	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);
738	}	1222	}
739		1223
740	pthread_mutex_unlock (&reslock);	1224	self->req = 0;
		1225	worker_clear (self);
		1226
		1227	UNLOCK (reslock);
741	}	1228	}
742	while (type != REQ_QUIT);	1229
		1230	quit:
		1231	LOCK (wrklock);
		1232	worker_free (self);
		1233	UNLOCK (wrklock);
743		1234
744	return 0;	1235	return 0;
745	}	1236	}
746		1237
747	/*****************************************************************************/	1238	/*****************************************************************************/
748		1239
749	static void atfork_prepare (void)	1240	static void atfork_prepare (void)
750	{	1241	{
751	pthread_mutex_lock (&reqlock);	1242	LOCK (wrklock);
752	pthread_mutex_lock (&reslock);	1243	LOCK (reqlock);
		1244	LOCK (reslock);
753	#if !HAVE_PREADWRITE	1245	#if !HAVE_PREADWRITE
754	pthread_mutex_lock (&preadwritelock);	1246	LOCK (preadwritelock);
755	#endif	1247	#endif
756	#if !HAVE_READDIR_R	1248	#if !HAVE_READDIR_R
757	pthread_mutex_lock (&readdirlock);	1249	LOCK (readdirlock);
758	#endif	1250	#endif
759	}	1251	}
760		1252
761	static void atfork_parent (void)	1253	static void atfork_parent (void)
762	{	1254	{
763	#if !HAVE_READDIR_R	1255	#if !HAVE_READDIR_R
764	pthread_mutex_unlock (&readdirlock);	1256	UNLOCK (readdirlock);
765	#endif	1257	#endif
766	#if !HAVE_PREADWRITE	1258	#if !HAVE_PREADWRITE
767	pthread_mutex_unlock (&preadwritelock);	1259	UNLOCK (preadwritelock);
768	#endif	1260	#endif
769	pthread_mutex_unlock (&reslock);	1261	UNLOCK (reslock);
770	pthread_mutex_unlock (&reqlock);	1262	UNLOCK (reqlock);
		1263	UNLOCK (wrklock);
771	}	1264	}
772		1265
773	static void atfork_child (void)	1266	static void atfork_child (void)
774	{	1267	{
775	aio_req prv;	1268	aio_req prv;
776		1269
777	started = 0;	1270	while (prv = reqq_shift (&req_queue))
		1271	req_free (prv);
778		1272
779	while (reqs)	1273	while (prv = reqq_shift (&res_queue))
		1274	req_free (prv);
		1275
		1276	while (wrk_first.next != &wrk_first)
780	{	1277	{
781	prv = reqs;	1278	worker *wrk = wrk_first.next;
782	reqs = prv->next;	1279
		1280	if (wrk->req)
		1281	req_free (wrk->req);
		1282
		1283	worker_clear (wrk);
783	req_free (prv);	1284	worker_free (wrk);
784	}	1285	}
785		1286
786	reqs = reqe = 0;	1287	started = 0;
787		1288	idle = 0;
788	while (ress)	1289	nreqs = 0;
789	{	1290	nready = 0;
790	prv = ress;	1291	npending = 0;
791	ress = prv->next;
792	req_free (prv);
793	}
794
795	ress = rese = 0;
796		1292
797	close (respipe [0]);	1293	close (respipe [0]);
798	close (respipe [1]);	1294	close (respipe [1]);
799	create_pipe ();	1295	create_pipe ();
800		1296
801	atfork_parent ();	1297	atfork_parent ();
802	}	1298	}
803		1299
804	#define dREQ \	1300	#define dREQ \
805	aio_req req; \	1301	aio_req req; \
		1302	int req_pri = next_pri; \
		1303	next_pri = DEFAULT_PRI + PRI_BIAS; \
806	\	1304	\
807	if (SvOK (callback) && !SvROK (callback)) \	1305	if (SvOK (callback) && !SvROK (callback)) \
808	croak ("callback must be undef or of reference type"); \	1306	croak ("callback must be undef or of reference type"); \
809	\	1307	\
810	Newz (0, req, 1, aio_cb); \	1308	Newz (0, req, 1, aio_cb); \
811	if (!req) \	1309	if (!req) \
812	croak ("out of memory during aio_req allocation"); \	1310	croak ("out of memory during aio_req allocation"); \
813	\	1311	\
814	req->callback = newSVsv (callback)	1312	req->callback = newSVsv (callback); \
		1313	req->pri = req_pri
815		1314
816	#define REQ_SEND \	1315	#define REQ_SEND \
817	req_send (req); \	1316	req_send (req); \
818	\	1317	\
819	if (GIMME_V != G_VOID) \	1318	if (GIMME_V != G_VOID) \
…		…
824	PROTOTYPES: ENABLE	1323	PROTOTYPES: ENABLE
825		1324
826	BOOT:	1325	BOOT:
827	{	1326	{
828	HV *stash = gv_stashpv ("IO::AIO", 1);	1327	HV *stash = gv_stashpv ("IO::AIO", 1);
		1328
829	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1329	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
830	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1330	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
831	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	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));
832		1336
833	create_pipe ();	1337	create_pipe ();
834	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1338	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
835	}	1339	}
836		1340
837	void	1341	void
838	min_parallel (nthreads)	1342	max_poll_reqs (int nreqs)
839	int nthreads
840	PROTOTYPE: $	1343	PROTOTYPE: $
		1344	CODE:
		1345	max_poll_reqs = nreqs;
841		1346
842	void	1347	void
843	max_parallel (nthreads)	1348	max_poll_time (double nseconds)
844	int nthreads
845	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);
846		1366
847	int	1367	int
848	max_outstanding (nreqs)	1368	max_outstanding (int maxreqs)
849	int nreqs	1369	PROTOTYPE: $
850	PROTOTYPE: $
851	CODE:	1370	CODE:
852	RETVAL = max_outstanding;	1371	RETVAL = max_outstanding;
853	max_outstanding = nreqs;	1372	max_outstanding = maxreqs;
		1373	OUTPUT:
		1374	RETVAL
854		1375
855	void	1376	void
856	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1377	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
857	SV * pathname	1378	SV8 * pathname
858	int flags	1379	int flags
859	int mode	1380	int mode
860	SV * callback	1381	SV * callback
861	PROTOTYPE: $$$;$	1382	PROTOTYPE: $$$;$
862	PPCODE:	1383	PPCODE:
863	{	1384	{
864	dREQ;	1385	dREQ;
865		1386
866	req->type = REQ_OPEN;	1387	req->type = REQ_OPEN;
867	req->data = newSVsv (pathname);	1388	req->sv1 = newSVsv (pathname);
868	req->dataptr = SvPVbyte_nolen (req->data);	1389	req->ptr1 = SvPVbyte_nolen (req->sv1);
869	req->fd = flags;	1390	req->int1 = flags;
870	req->mode = mode;	1391	req->mode = mode;
871		1392
872	REQ_SEND;	1393	REQ_SEND;
873	}	1394	}
874		1395
…		…
884	PPCODE:	1405	PPCODE:
885	{	1406	{
886	dREQ;	1407	dREQ;
887		1408
888	req->type = ix;	1409	req->type = ix;
889	req->fh = newSVsv (fh);	1410	req->fh = newSVsv (fh);
890	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1411	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
891		1412
892	REQ_SEND (req);	1413	REQ_SEND (req);
893	}	1414	}
894		1415
895	void	1416	void
896	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1417	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
897	SV * fh	1418	SV * fh
898	UV offset	1419	UV offset
899	UV length	1420	UV length
900	SV * data	1421	SV8 * data
901	UV dataoffset	1422	UV dataoffset
902	SV * callback	1423	SV * callback
903	ALIAS:	1424	ALIAS:
904	aio_read = REQ_READ	1425	aio_read = REQ_READ
905	aio_write = REQ_WRITE	1426	aio_write = REQ_WRITE
906	PROTOTYPE: $$$$$;$	1427	PROTOTYPE: $$$$$;$
907	PPCODE:	1428	PPCODE:
908	{	1429	{
909	aio_req req;
910	STRLEN svlen;	1430	STRLEN svlen;
911	char *svptr = SvPVbyte (data, svlen);	1431	char *svptr = SvPVbyte (data, svlen);
912		1432
913	SvUPGRADE (data, SVt_PV);	1433	SvUPGRADE (data, SVt_PV);
914	SvPOK_on (data);	1434	SvPOK_on (data);
…		…
926	length = svlen - dataoffset;	1446	length = svlen - dataoffset;
927	}	1447	}
928	else	1448	else
929	{	1449	{
930	/* read: grow scalar as necessary */	1450	/* read: grow scalar as necessary */
931	svptr = SvGROW (data, length + dataoffset);	1451	svptr = SvGROW (data, length + dataoffset + 1);
932	}	1452	}
933		1453
934	if (length < 0)	1454	if (length < 0)
935	croak ("length must not be negative");	1455	croak ("length must not be negative");
936		1456
937	{	1457	{
938	dREQ;	1458	dREQ;
939		1459
940	req->type = ix;	1460	req->type = ix;
941	req->fh = newSVsv (fh);	1461	req->fh = newSVsv (fh);
942	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1462	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
943	: IoOFP (sv_2io (fh)));	1463	: IoOFP (sv_2io (fh)));
944	req->offset = offset;	1464	req->offs = offset;
945	req->length = length;	1465	req->size = length;
946	req->data = SvREFCNT_inc (data);	1466	req->sv1 = SvREFCNT_inc (data);
947	req->dataptr = (char *)svptr + dataoffset;	1467	req->ptr1 = (char *)svptr + dataoffset;
		1468	req->stroffset = dataoffset;
948		1469
949	if (!SvREADONLY (data))	1470	if (!SvREADONLY (data))
950	{	1471	{
951	SvREADONLY_on (data);	1472	SvREADONLY_on (data);
952	req->data2ptr = (void *)data;	1473	req->flags |= FLAG_SV1_RO_OFF;
953	}	1474	}
954		1475
955	REQ_SEND;	1476	REQ_SEND;
956	}	1477	}
		1478	}
		1479
		1480	void
		1481	aio_readlink (path,callback=&PL_sv_undef)
		1482	SV8 * path
		1483	SV * callback
		1484	PROTOTYPE: $$;$
		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;
957	}	1500	}
958		1501
959	void	1502	void
960	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)
961	SV * out_fh	1504	SV * out_fh
…		…
967	PPCODE:	1510	PPCODE:
968	{	1511	{
969	dREQ;	1512	dREQ;
970		1513
971	req->type = REQ_SENDFILE;	1514	req->type = REQ_SENDFILE;
972	req->fh = newSVsv (out_fh);	1515	req->fh = newSVsv (out_fh);
973	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1516	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
974	req->fh2 = newSVsv (in_fh);	1517	req->sv2 = newSVsv (in_fh);
975	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1518	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
976	req->offset = in_offset;	1519	req->offs = in_offset;
977	req->length = length;	1520	req->size = length;
978		1521
979	REQ_SEND;	1522	REQ_SEND;
980	}	1523	}
981		1524
982	void	1525	void
…		…
989	PPCODE:	1532	PPCODE:
990	{	1533	{
991	dREQ;	1534	dREQ;
992		1535
993	req->type = REQ_READAHEAD;	1536	req->type = REQ_READAHEAD;
994	req->fh = newSVsv (fh);	1537	req->fh = newSVsv (fh);
995	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1538	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
996	req->offset = offset;	1539	req->offs = offset;
997	req->length = length;	1540	req->size = length;
998		1541
999	REQ_SEND;	1542	REQ_SEND;
1000	}	1543	}
1001		1544
1002	void	1545	void
1003	aio_stat (fh_or_path,callback=&PL_sv_undef)	1546	aio_stat (fh_or_path,callback=&PL_sv_undef)
1004	SV * fh_or_path	1547	SV8 * fh_or_path
1005	SV * callback	1548	SV * callback
1006	ALIAS:	1549	ALIAS:
1007	aio_stat = REQ_STAT	1550	aio_stat = REQ_STAT
1008	aio_lstat = REQ_LSTAT	1551	aio_lstat = REQ_LSTAT
1009	PPCODE:	1552	PPCODE:
1010	{	1553	{
1011	dREQ;	1554	dREQ;
1012		1555
1013	New (0, req->statdata, 1, Stat_t);	1556	req->ptr2 = malloc (sizeof (Stat_t));
1014	if (!req->statdata)	1557	if (!req->ptr2)
1015	{	1558	{
1016	req_free (req);	1559	req_free (req);
1017	croak ("out of memory during aio_req->statdata allocation");	1560	croak ("out of memory during aio_stat statdata allocation");
1018	}	1561	}
		1562
		1563	req->flags |= FLAG_PTR2_FREE;
1019		1564
1020	if (SvPOK (fh_or_path))	1565	if (SvPOK (fh_or_path))
1021	{	1566	{
1022	req->type = ix;	1567	req->type = ix;
1023	req->data = newSVsv (fh_or_path);	1568	req->sv1 = newSVsv (fh_or_path);
1024	req->dataptr = SvPVbyte_nolen (req->data);	1569	req->ptr1 = SvPVbyte_nolen (req->sv1);
1025	}	1570	}
1026	else	1571	else
1027	{	1572	{
1028	req->type = REQ_FSTAT;	1573	req->type = REQ_FSTAT;
1029	req->fh = newSVsv (fh_or_path);	1574	req->fh = newSVsv (fh_or_path);
1030	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1575	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1031	}	1576	}
1032		1577
1033	REQ_SEND;	1578	REQ_SEND;
1034	}	1579	}
1035		1580
1036	void	1581	void
1037	aio_unlink (pathname,callback=&PL_sv_undef)	1582	aio_unlink (pathname,callback=&PL_sv_undef)
1038	SV * pathname	1583	SV8 * pathname
1039	SV * callback	1584	SV * callback
1040	ALIAS:	1585	ALIAS:
1041	aio_unlink = REQ_UNLINK	1586	aio_unlink = REQ_UNLINK
1042	aio_rmdir = REQ_RMDIR	1587	aio_rmdir = REQ_RMDIR
1043	aio_readdir = REQ_READDIR	1588	aio_readdir = REQ_READDIR
1044	PPCODE:	1589	PPCODE:
1045	{	1590	{
1046	dREQ;	1591	dREQ;
1047		1592
1048	req->type = ix;	1593	req->type = ix;
1049	req->data = newSVsv (pathname);	1594	req->sv1 = newSVsv (pathname);
1050	req->dataptr = SvPVbyte_nolen (req->data);	1595	req->ptr1 = SvPVbyte_nolen (req->sv1);
1051		1596
1052	REQ_SEND;	1597	REQ_SEND;
1053	}	1598	}
1054		1599
1055	void	1600	void
1056	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1601	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1057	SV * oldpath	1602	SV8 * oldpath
1058	SV * newpath	1603	SV8 * newpath
1059	SV * callback	1604	SV * callback
1060	ALIAS:	1605	ALIAS:
1061	aio_link = REQ_LINK	1606	aio_link = REQ_LINK
1062	aio_symlink = REQ_SYMLINK	1607	aio_symlink = REQ_SYMLINK
1063	aio_rename = REQ_RENAME	1608	aio_rename = REQ_RENAME
1064	PPCODE:	1609	PPCODE:
1065	{	1610	{
1066	dREQ;	1611	dREQ;
1067		1612
1068	req->type = ix;	1613	req->type = ix;
1069	req->fh = newSVsv (oldpath);	1614	req->fh = newSVsv (oldpath);
1070	req->data2ptr = SvPVbyte_nolen (req->fh);	1615	req->ptr2 = SvPVbyte_nolen (req->fh);
1071	req->data = newSVsv (newpath);	1616	req->sv1 = newSVsv (newpath);
1072	req->dataptr = SvPVbyte_nolen (req->data);	1617	req->ptr1 = SvPVbyte_nolen (req->sv1);
1073		1618
1074	REQ_SEND;	1619	REQ_SEND;
1075	}	1620	}
1076		1621
1077	void	1622	void
		1623	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1624	SV8 * pathname
		1625	SV * callback
		1626	UV mode
		1627	UV dev
		1628	PPCODE:
		1629	{
		1630	dREQ;
		1631
		1632	req->type = REQ_MKNOD;
		1633	req->sv1 = newSVsv (pathname);
		1634	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1635	req->mode = (mode_t)mode;
		1636	req->offs = dev;
		1637
		1638	REQ_SEND;
		1639	}
		1640
		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
1078	aio_group (callback=&PL_sv_undef)	1657	aio_group (callback=&PL_sv_undef)
1079	SV * callback	1658	SV * callback
1080	PROTOTYPE: ;&	1659	PROTOTYPE: ;$
1081	PPCODE:	1660	PPCODE:
1082	{	1661	{
1083	dREQ;	1662	dREQ;
		1663
1084	req->type = REQ_GROUP;	1664	req->type = REQ_GROUP;
		1665
		1666	req_send (req);
1085	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1667	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1086	}	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;
1087		1703
1088	void	1704	void
1089	flush ()	1705	flush ()
1090	PROTOTYPE:	1706	PROTOTYPE:
1091	CODE:	1707	CODE:
…		…
1093	{	1709	{
1094	poll_wait ();	1710	poll_wait ();
1095	poll_cb ();	1711	poll_cb ();
1096	}	1712	}
1097		1713
1098	void	1714	int
1099	poll()	1715	poll()
1100	PROTOTYPE:	1716	PROTOTYPE:
1101	CODE:	1717	CODE:
1102	if (nreqs)
1103	{
1104	poll_wait ();	1718	poll_wait ();
1105	poll_cb ();	1719	RETVAL = poll_cb ();
1106	}	1720	OUTPUT:
		1721	RETVAL
1107		1722
1108	int	1723	int
1109	poll_fileno()	1724	poll_fileno()
1110	PROTOTYPE:	1725	PROTOTYPE:
1111	CODE:	1726	CODE:
…		…
1123		1738
1124	void	1739	void
1125	poll_wait()	1740	poll_wait()
1126	PROTOTYPE:	1741	PROTOTYPE:
1127	CODE:	1742	CODE:
1128	if (nreqs)
1129	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	}
1130		1781
1131	int	1782	int
1132	nreqs()	1783	nreqs()
1133	PROTOTYPE:	1784	PROTOTYPE:
1134	CODE:	1785	CODE:
1135	RETVAL = nreqs;	1786	RETVAL = nreqs;
1136	OUTPUT:	1787	OUTPUT:
1137	RETVAL	1788	RETVAL
1138		1789
1139	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1790	int
1140		1791	nready()
1141	void
1142	cancel (aio_req_ornot req)
1143	PROTOTYPE:	1792	PROTOTYPE:
1144	CODE:	1793	CODE:
1145	req->cancelled = 1;	1794	RETVAL = get_nready ();
		1795	OUTPUT:
		1796	RETVAL
1146		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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