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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.41 by root, Sat Jun 24 19:14:04 2006 UTC vs.
Revision 1.80 by root, Fri Oct 27 19:17:23 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"
…		…
9		18
10	#include <pthread.h>	19	#include <pthread.h>
11		20
12	#include <stddef.h>	21	#include <stddef.h>
13	#include <errno.h>	22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
14	#include <sys/types.h>	25	#include <sys/types.h>
15	#include <sys/stat.h>	26	#include <sys/stat.h>
16	#include <limits.h>	27	#include <limits.h>
17	#include <unistd.h>	28	#include <unistd.h>
18	#include <fcntl.h>	29	#include <fcntl.h>
…		…
37	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
38	#ifndef NAME_MAX	49	#ifndef NAME_MAX
39	# define NAME_MAX 4096	50	# define NAME_MAX 4096
40	#endif	51	#endif
41		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
42	#if __ia64	58	#if __ia64
43	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	62	#else
45	# define STACKSIZE 8192	63	# define STACKSIZE 16384
		64	#endif
		65
		66	/* wether word reads are potentially non-atomic.
		67	* this is conservatice, likely most arches this runs
		68	* on have atomic word read/writes.
		69	*/
		70	#ifndef WORDREAD_UNSAFE
		71	# if __i386 || __x86_64
		72	# define WORDREAD_UNSAFE 0
		73	# else
		74	# define WORDREAD_UNSAFE 1
46	#endif	75	# endif
		76	#endif
		77
		78	/* buffer size for various temporary buffers */
		79	#define AIO_BUFSIZE 65536
		80
		81	#define dBUF \
		82	char *aio_buf; \
		83	LOCK (wrklock); \
		84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		85	UNLOCK (wrklock); \
		86	if (!aio_buf) \
		87	return -1;
47		88
48	enum {	89	enum {
49	REQ_QUIT,	90	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	97	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
		99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
58	};	101	};
59		102
		103	#define AIO_REQ_KLASS "IO::AIO::REQ"
		104	#define AIO_GRP_KLASS "IO::AIO::GRP"
		105
60	typedef struct aio_cb {	106	typedef struct aio_cb
		107	{
61	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
62		109
63	int type;	110	SV *data, *callback;
64		111	SV *fh, *fh2;
65	/* should receive a cleanup, with unions */	112	void *dataptr, *data2ptr;
66	int fd, fd2;	113	Stat_t *statdata;
67	off_t offset;	114	off_t offset;
68	size_t length;	115	size_t length;
69	ssize_t result;	116	ssize_t result;
		117
		118	STRLEN dataoffset;
		119	int type;
		120	int fd, fd2;
		121	int errorno;
70	mode_t mode; /* open */	122	mode_t mode; /* open */
71	int errorno;
72	SV *data, *callback;
73	SV *fh, *fh2;
74	void *dataptr, *data2ptr;
75	STRLEN dataoffset;
76		123
77	Stat_t *statdata;	124	unsigned char flags;
		125	unsigned char pri;
		126
		127	SV *self; /* the perl counterpart of this request, if any */
		128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
78	} aio_cb;	129	} aio_cb;
79		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
		134
80	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
		136	typedef aio_cb *aio_req_ornot;
81		137
		138	enum {
		139	PRI_MIN = -4,
		140	PRI_MAX = 4,
		141
		142	DEFAULT_PRI = 0,
		143	PRI_BIAS = -PRI_MIN,
		144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		145	};
		146
		147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		148
82	static int started, wanted;	149	static unsigned int started, wanted;
83	static volatile int nreqs;	150
84	static int max_outstanding = 1<<30;	151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		153	#else
		154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		155	#endif
		156
		157	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		158	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		159
		160	/* worker threads management */
		161	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		162
		163	typedef struct worker {
		164	/* locked by wrklock */
		165	struct worker *prev, *next;
		166
		167	pthread_t tid;
		168
		169	/* locked by reslock, reqlock or wrklock */
		170	aio_req req; /* currently processed request */
		171	void *dbuf;
		172	DIR *dirp;
		173	} worker;
		174
		175	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		176
		177	static void worker_clear (worker *wrk)
		178	{
		179	if (wrk->dirp)
		180	{
		181	closedir (wrk->dirp);
		182	wrk->dirp = 0;
		183	}
		184
		185	if (wrk->dbuf)
		186	{
		187	free (wrk->dbuf);
		188	wrk->dbuf = 0;
		189	}
		190	}
		191
		192	static void worker_free (worker *wrk)
		193	{
		194	wrk->next->prev = wrk->prev;
		195	wrk->prev->next = wrk->next;
		196
		197	free (wrk);
		198	}
		199
		200	static volatile unsigned int nreqs, nready, npending;
		201	static volatile unsigned int max_outstanding = 0xffffffff;
85	static int respipe [2];	202	static int respipe [2];
86		203
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90		207
91	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
92	static volatile aio_req ress, rese; /* queue start, queue end */
93		209
		210	static unsigned int get_nready ()
		211	{
		212	unsigned int retval;
		213
		214	LOCK (reqlock);
		215	retval = nready;
		216	UNLOCK (reqlock);
		217
		218	return retval;
		219	}
		220
		221	static unsigned int get_npending ()
		222	{
		223	unsigned int retval;
		224
		225	LOCK (reslock);
		226	retval = npending;
		227	UNLOCK (reslock);
		228
		229	return retval;
		230	}
		231
		232	#else
		233
		234	# define get_nready() nready
		235	# define get_npending() npending
		236
		237	#endif
		238
		239	/*
		240	* a somewhat faster data structure might be nice, but
		241	* with 8 priorities this actually needs <20 insns
		242	* per shift, the most expensive operation.
		243	*/
		244	typedef struct {
		245	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		246	int size;
		247	} reqq;
		248
		249	static reqq req_queue;
		250	static reqq res_queue;
		251
		252	int reqq_push (reqq *q, aio_req req)
		253	{
		254	int pri = req->pri;
		255	req->next = 0;
		256
		257	if (q->qe[pri])
		258	{
		259	q->qe[pri]->next = req;
		260	q->qe[pri] = req;
		261	}
		262	else
		263	q->qe[pri] = q->qs[pri] = req;
		264
		265	return q->size++;
		266	}
		267
		268	aio_req reqq_shift (reqq *q)
		269	{
		270	int pri;
		271
		272	if (!q->size)
		273	return 0;
		274
		275	--q->size;
		276
		277	for (pri = NUM_PRI; pri--; )
		278	{
		279	aio_req req = q->qs[pri];
		280
		281	if (req)
		282	{
		283	if (!(q->qs[pri] = req->next))
		284	q->qe[pri] = 0;
		285
		286	return req;
		287	}
		288	}
		289
		290	abort ();
		291	}
		292
		293	static int poll_cb (int max);
		294	static void req_invoke (aio_req req);
		295	static void req_free (aio_req req);
		296	static void req_cancel (aio_req req);
		297
		298	/* must be called at most once */
		299	static SV *req_sv (aio_req req, const char *klass)
		300	{
		301	if (!req->self)
		302	{
		303	req->self = (SV *)newHV ();
		304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		305	}
		306
		307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		308	}
		309
		310	static aio_req SvAIO_REQ (SV *sv)
		311	{
		312	MAGIC *mg;
		313
		314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		315	croak ("object of class " AIO_REQ_KLASS " expected");
		316
		317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		318
		319	return mg ? (aio_req)mg->mg_ptr : 0;
		320	}
		321
		322	static void aio_grp_feed (aio_req grp)
		323	{
		324	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		325	{
		326	int old_len = grp->length;
		327
		328	if (grp->fh2 && SvOK (grp->fh2))
		329	{
		330	dSP;
		331
		332	ENTER;
		333	SAVETMPS;
		334	PUSHMARK (SP);
		335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		336	PUTBACK;
		337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		338	SPAGAIN;
		339	FREETMPS;
		340	LEAVE;
		341	}
		342
		343	/* stop if no progress has been made */
		344	if (old_len == grp->length)
		345	{
		346	SvREFCNT_dec (grp->fh2);
		347	grp->fh2 = 0;
		348	break;
		349	}
		350	}
		351	}
		352
		353	static void aio_grp_dec (aio_req grp)
		354	{
		355	--grp->length;
		356
		357	/* call feeder, if applicable */
		358	aio_grp_feed (grp);
		359
		360	/* finish, if done */
		361	if (!grp->length && grp->fd)
		362	{
		363	req_invoke (grp);
		364	req_free (grp);
		365	}
		366	}
		367
		368	static void req_invoke (aio_req req)
		369	{
		370	dSP;
		371
		372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		373	{
		374	ENTER;
		375	SAVETMPS;
		376	PUSHMARK (SP);
		377	EXTEND (SP, 1);
		378
		379	switch (req->type)
		380	{
		381	case REQ_READDIR:
		382	{
		383	SV *rv = &PL_sv_undef;
		384
		385	if (req->result >= 0)
		386	{
		387	int i;
		388	char *buf = req->data2ptr;
		389	AV *av = newAV ();
		390
		391	av_extend (av, req->result - 1);
		392
		393	for (i = 0; i < req->result; ++i)
		394	{
		395	SV *sv = newSVpv (buf, 0);
		396
		397	av_store (av, i, sv);
		398	buf += SvCUR (sv) + 1;
		399	}
		400
		401	rv = sv_2mortal (newRV_noinc ((SV *)av));
		402	}
		403
		404	PUSHs (rv);
		405	}
		406	break;
		407
		408	case REQ_OPEN:
		409	{
		410	/* convert fd to fh */
		411	SV *fh;
		412
		413	PUSHs (sv_2mortal (newSViv (req->result)));
		414	PUTBACK;
		415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		416	SPAGAIN;
		417
		418	fh = SvREFCNT_inc (POPs);
		419
		420	PUSHMARK (SP);
		421	XPUSHs (sv_2mortal (fh));
		422	}
		423	break;
		424
		425	case REQ_GROUP:
		426	req->fd = 2; /* mark group as finished */
		427
		428	if (req->data)
		429	{
		430	int i;
		431	AV *av = (AV *)req->data;
		432
		433	EXTEND (SP, AvFILL (av) + 1);
		434	for (i = 0; i <= AvFILL (av); ++i)
		435	PUSHs (*av_fetch (av, i, 0));
		436	}
		437	break;
		438
		439	case REQ_NOP:
		440	case REQ_BUSY:
		441	break;
		442
		443	default:
		444	PUSHs (sv_2mortal (newSViv (req->result)));
		445	break;
		446	}
		447
		448	errno = req->errorno;
		449
		450	PUTBACK;
		451	call_sv (req->callback, G_VOID | G_EVAL);
		452	SPAGAIN;
		453
		454	FREETMPS;
		455	LEAVE;
		456	}
		457
		458	if (req->grp)
		459	{
		460	aio_req grp = req->grp;
		461
		462	/* unlink request */
		463	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		464	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		465
		466	if (grp->grp_first == req)
		467	grp->grp_first = req->grp_next;
		468
		469	aio_grp_dec (grp);
		470	}
		471
		472	if (SvTRUE (ERRSV))
		473	{
		474	req_free (req);
		475	croak (0);
		476	}
		477	}
		478
94	static void free_req (aio_req req)	479	static void req_free (aio_req req)
95	{	480	{
96	if (req->data)	481	if (req->self)
		482	{
		483	sv_unmagic (req->self, PERL_MAGIC_ext);
		484	SvREFCNT_dec (req->self);
		485	}
		486
97	SvREFCNT_dec (req->data);	487	SvREFCNT_dec (req->data);
98
99	if (req->fh)
100	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
101
102	if (req->fh2)
103	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
104
105	if (req->statdata)
106	Safefree (req->statdata);
107
108	if (req->callback)
109	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
		491	Safefree (req->statdata);
110		492
111	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
112	free (req->data2ptr);	494	free (req->data2ptr);
113		495
114	Safefree (req);	496	Safefree (req);
115	}	497	}
116		498
117	static void	499	static void req_cancel_subs (aio_req grp)
118	poll_wait ()
119	{	500	{
120	if (nreqs && !ress)	501	aio_req sub;
		502
		503	if (grp->type != REQ_GROUP)
		504	return;
		505
		506	SvREFCNT_dec (grp->fh2);
		507	grp->fh2 = 0;
		508
		509	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		510	req_cancel (sub);
		511	}
		512
		513	static void req_cancel (aio_req req)
		514	{
		515	req->flags |= FLAG_CANCELLED;
		516
		517	req_cancel_subs (req);
		518	}
		519
		520	static void *aio_proc(void *arg);
		521
		522	static void start_thread (void)
		523	{
		524	sigset_t fullsigset, oldsigset;
		525	pthread_attr_t attr;
		526
		527	worker *wrk = calloc (1, sizeof (worker));
		528
		529	if (!wrk)
		530	croak ("unable to allocate worker thread data");
		531
		532	pthread_attr_init (&attr);
		533	pthread_attr_setstacksize (&attr, STACKSIZE);
		534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		535	#ifdef PTHREAD_SCOPE_PROCESS
		536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		537	#endif
		538
		539	sigfillset (&fullsigset);
		540
		541	LOCK (wrklock);
		542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		543
		544	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		545	{
		546	wrk->prev = &wrk_first;
		547	wrk->next = wrk_first.next;
		548	wrk_first.next->prev = wrk;
		549	wrk_first.next = wrk;
		550	++started;
121	{	551	}
		552	else
		553	free (wrk);
		554
		555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		556	UNLOCK (wrklock);
		557	}
		558
		559	static void maybe_start_thread ()
		560	{
		561	#if 0
		562	static struct timeval last;
		563	struct timeval diff, now;
		564	#endif
		565
		566	if (started >= wanted)
		567	return;
		568
		569	if (nready <= nreqs - get_nready () - get_npending ())
		570	return;
		571
		572	#if 0
		573	gettimeofday (&now, 0);
		574
		575	diff.tv_sec = now.tv_sec - last.tv_sec;
		576	diff.tv_usec = now.tv_usec - last.tv_usec;
		577
		578	if (diff.tv_usec < 0)
		579	{
		580	--diff.tv_sec;
		581	diff.tv_usec += 1000000;
		582	}
		583
		584	if (!diff.tv_sec && diff.tv_usec < 10000)
		585	return;
		586
		587	last = now;
		588	#endif
		589
		590	start_thread ();
		591	}
		592
		593	static void req_send (aio_req req)
		594	{
		595	++nreqs;
		596
		597	LOCK (reqlock);
		598	++nready;
		599	reqq_push (&req_queue, req);
		600	pthread_cond_signal (&reqwait);
		601	UNLOCK (reqlock);
		602
		603	maybe_start_thread ();
		604	}
		605
		606	static void end_thread (void)
		607	{
		608	aio_req req;
		609
		610	Newz (0, req, 1, aio_cb);
		611
		612	req->type = REQ_QUIT;
		613	req->pri = PRI_MAX + PRI_BIAS;
		614
		615	req_send (req);
		616
		617	LOCK (wrklock);
		618	--started;
		619	UNLOCK (wrklock);
		620	}
		621
		622	static void min_parallel (int nthreads)
		623	{
		624	if (wanted < nthreads)
		625	wanted = nthreads;
		626	}
		627
		628	static void max_parallel (int nthreads)
		629	{
		630	if (wanted > nthreads)
		631	wanted = nthreads;
		632
		633	while (started > wanted)
		634	end_thread ();
		635	}
		636
		637	static void poll_wait ()
		638	{
122	fd_set rfd;	639	fd_set rfd;
		640
		641	while (nreqs)
		642	{
		643	int size;
		644	if (WORDREAD_UNSAFE) LOCK (reslock);
		645	size = res_queue.size;
		646	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		647
		648	if (size)
		649	return;
		650
		651	maybe_start_thread ();
		652
123	FD_ZERO(&rfd);	653	FD_ZERO(&rfd);
124	FD_SET(respipe [0], &rfd);	654	FD_SET(respipe [0], &rfd);
125		655
126	select (respipe [0] + 1, &rfd, 0, 0, 0);	656	select (respipe [0] + 1, &rfd, 0, 0, 0);
127	}	657	}
128	}	658	}
129		659
130	static int	660	static int poll_cb (int max)
131	poll_cb ()
132	{	661	{
133	dSP;	662	dSP;
134	int count = 0;	663	int count = 0;
135	int do_croak = 0;	664	int do_croak = 0;
136	aio_req req;	665	aio_req req;
137		666
138	for (;;)	667	for (;;)
139	{	668	{
140	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
141	req = ress;
142
143	if (req)
144	{	670	{
145	ress = req->next;	671	maybe_start_thread ();
146		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
147	if (!ress)	676	if (req)
148	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
149	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
150	char buf [32];	683	char buf [32];
151	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
152	;	686	}
153
154	rese = 0;
155	}	687	}
156	}
157		688
158	pthread_mutex_unlock (&reslock);	689	UNLOCK (reslock);
159		690
160	if (!req)	691	if (!req)
161	break;	692	break;
162		693
163	nreqs--;	694	--nreqs;
164		695
165	if (req->type == REQ_QUIT)
166	started--;
167	else
168	{
169	int errorno = errno;
170	errno = req->errorno;
171
172	if (req->type == REQ_READ)	696	if (req->type == REQ_GROUP && req->length)
173	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
174
175	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176	SvREADONLY_off (req->data);
177
178	if (req->statdata)
179	{	697	{
180	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	698	req->fd = 1; /* mark request as delayed */
181	PL_laststatval = req->result;	699	continue;
182	PL_statcache = *(req->statdata);
183	}
184
185	ENTER;
186	PUSHMARK (SP);
187
188	if (req->type == REQ_READDIR)
189	{
190	SV *rv = &PL_sv_undef;
191
192	if (req->result >= 0)
193	{
194	char *buf = req->data2ptr;
195	AV *av = newAV ();
196
197	while (req->result)
198	{
199	SV *sv = newSVpv (buf, 0);
200
201	av_push (av, sv);
202	buf += SvCUR (sv) + 1;
203	req->result--;
204	}
205
206	rv = sv_2mortal (newRV_noinc ((SV *)av));
207	}
208
209	XPUSHs (rv);
210	}	700	}
211	else	701	else
212	{	702	{
213	XPUSHs (sv_2mortal (newSViv (req->result)));
214
215	if (req->type == REQ_OPEN)	703	if (req->type == REQ_READ)
		704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		705
		706	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		707	SvREADONLY_off (req->data);
		708
		709	if (req->statdata)
216	{	710	{
217	/* convert fd to fh */	711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
218	SV *fh;	712	PL_laststatval = req->result;
219		713	PL_statcache = *(req->statdata);
220	PUTBACK;
221	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
222	SPAGAIN;
223
224	fh = SvREFCNT_inc (POPs);
225
226	PUSHMARK (SP);
227	XPUSHs (sv_2mortal (fh));
228	}	714	}
		715
		716	req_invoke (req);
		717
		718	count++;
229	}	719	}
230		720
231	if (SvOK (req->callback))	721	req_free (req);
232	{
233	PUTBACK;
234	call_sv (req->callback, G_VOID | G_EVAL);
235	SPAGAIN;
236
237	if (SvTRUE (ERRSV))
238	{
239	free_req (req);
240	croak (0);
241	}
242	}
243
244	LEAVE;
245
246	errno = errorno;
247	count++;
248	}	722	}
249		723
250	free_req (req);	724	if (nreqs <= max_outstanding)
		725	break;
		726
		727	poll_wait ();
		728
		729	max = 0;
251	}	730	}
252		731
253	return count;	732	return count;
254	}
255
256	static void *aio_proc(void *arg);
257
258	static void
259	start_thread (void)
260	{
261	sigset_t fullsigset, oldsigset;
262	pthread_t tid;
263	pthread_attr_t attr;
264
265	pthread_attr_init (&attr);
266	pthread_attr_setstacksize (&attr, STACKSIZE);
267	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
268
269	sigfillset (&fullsigset);
270	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
271
272	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
273	started++;
274
275	sigprocmask (SIG_SETMASK, &oldsigset, 0);
276	}
277
278	static void
279	send_req (aio_req req)
280	{
281	while (started < wanted && nreqs >= started)
282	start_thread ();
283
284	nreqs++;
285
286	pthread_mutex_lock (&reqlock);
287
288	req->next = 0;
289
290	if (reqe)
291	{
292	reqe->next = req;
293	reqe = req;
294	}
295	else
296	reqe = reqs = req;
297
298	pthread_cond_signal (&reqwait);
299	pthread_mutex_unlock (&reqlock);
300
301	if (nreqs > max_outstanding)
302	for (;;)
303	{
304	poll_cb ();
305
306	if (nreqs <= max_outstanding)
307	break;
308
309	poll_wait ();
310	}
311	}
312
313	static void
314	end_thread (void)
315	{
316	aio_req req;
317	Newz (0, req, 1, aio_cb);
318	req->type = REQ_QUIT;
319
320	send_req (req);
321	}
322
323	static void min_parallel (int nthreads)
324	{
325	if (wanted < nthreads)
326	wanted = nthreads;
327	}
328
329	static void max_parallel (int nthreads)
330	{
331	int cur = started;
332
333	if (wanted > nthreads)
334	wanted = nthreads;
335
336	while (cur > wanted)
337	{
338	end_thread ();
339	cur--;
340	}
341
342	while (started > wanted)
343	{
344	poll_wait ();
345	poll_cb ();
346	}
347	}	733	}
348		734
349	static void create_pipe ()	735	static void create_pipe ()
350	{	736	{
351	if (pipe (respipe))	737	if (pipe (respipe))
…		…
370	* normal read/write by using a mutex. slows down execution a lot,	756	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.	757	* but that's your problem, not mine.
372	*/	758	*/
373	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374		760
375	static ssize_t	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{	762	{
378	ssize_t res;	763	ssize_t res;
379	off_t ooffset;	764	off_t ooffset;
380		765
381	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);	769	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
387		772
388	return res;	773	return res;
389	}	774	}
390		775
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)	776	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
393	{	777	{
394	ssize_t res;	778	ssize_t res;
395	off_t ooffset;	779	off_t ooffset;
396		780
397	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);	784	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
403		787
404	return res;	788	return res;
405	}	789	}
406	#endif	790	#endif
407		791
408	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
409	# define fdatasync fsync	793	# define fdatasync fsync
410	#endif	794	#endif
411		795
412	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
413	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
414		798
415	static ssize_t	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
416	readahead (int fd, off_t offset, size_t count)
417	{	800	{
418	char readahead_buf[4096];	801	dBUF;
419		802
420	while (count > 0)	803	while (count > 0)
421	{	804	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
423		806
424	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
425	offset += len;	808	offset += len;
426	count -= len;	809	count -= len;
427	}	810	}
428		811
429	errno = 0;	812	errno = 0;
430	}	813	}
		814
431	#endif	815	#endif
432		816
433	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
434	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
435		819
436	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
437		821
438	static int
439	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
440	{	823	{
441	struct dirent *e;	824	struct dirent *e;
442	int errorno;	825	int errorno;
443		826
444	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
445		828
446	e = readdir (dirp);	829	e = readdir (dirp);
447	errorno = errno;	830	errorno = errno;
448		831
449	if (e)	832	if (e)
…		…
452	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
453	}	836	}
454	else	837	else
455	*res = 0;	838	*res = 0;
456		839
457	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
458		841
459	errno = errorno;	842	errno = errorno;
460	return e ? 0 : -1;	843	return e ? 0 : -1;
461	}	844	}
462	#endif	845	#endif
463		846
464	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
465	static ssize_t
466	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
467	{	849	{
468	ssize_t res;	850	ssize_t res;
469		851
470	if (!count)	852	if (!count)
471	return 0;	853	return 0;
…		…
482	{	864	{
483	off_t sbytes;	865	off_t sbytes;
484	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
485		867
486	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
487	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
488	res = sbytes;	870	res = sbytes;
489	}	871	}
490		872
491	# elif __hpux	873	# elif __hpux
492	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
520	#endif	902	#endif
521	)	903	)
522	)	904	)
523	{	905	{
524	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
525	char buf[4096];	907	dBUF;
		908
526	res = 0;	909	res = 0;
527		910
528	while (count)	911	while (count)
529	{	912	{
530	ssize_t cnt;	913	ssize_t cnt;
531		914
532	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
533		916
534	if (cnt <= 0)	917	if (cnt <= 0)
535	{	918	{
536	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
537	break;	920	break;
538	}	921	}
539		922
540	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
541		924
542	if (cnt <= 0)	925	if (cnt <= 0)
543	{	926	{
544	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
545	break;	928	break;
…		…
553		936
554	return res;	937	return res;
555	}	938	}
556		939
557	/* read a full directory */	940	/* read a full directory */
558	static int	941	static void scandir_ (aio_req req, worker *self)
559	scandir_ (const char *path, void **namesp)
560	{	942	{
561	DIR *dirp = opendir (path);	943	DIR *dirp;
562	union	944	union
563	{	945	{
564	struct dirent d;	946	struct dirent d;
565	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
566	} u;	948	} *u;
567	struct dirent *entp;	949	struct dirent *entp;
568	char *name, *names;	950	char *name, *names;
569	int memlen = 4096;	951	int memlen = 4096;
570	int memofs = 0;	952	int memofs = 0;
571	int res = 0;	953	int res = 0;
572	int errorno;	954	int errorno;
573		955
574	if (!dirp)	956	LOCK (wrklock);
575	return -1;	957	self->dirp = dirp = opendir (req->dataptr);
576		958	self->dbuf = u = malloc (sizeof (*u));
577	names = malloc (memlen);	959	req->data2ptr = names = malloc (memlen);
		960	UNLOCK (wrklock);
		961
		962	if (dirp && u && names)
		963	for (;;)
		964	{
		965	errno = 0;
		966	readdir_r (dirp, &u->d, &entp);
		967
		968	if (!entp)
		969	break;
		970
		971	name = entp->d_name;
		972
		973	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		974	{
		975	int len = strlen (name) + 1;
		976
		977	res++;
		978
		979	while (memofs + len > memlen)
		980	{
		981	memlen *= 2;
		982	LOCK (wrklock);
		983	req->data2ptr = names = realloc (names, memlen);
		984	UNLOCK (wrklock);
		985
		986	if (!names)
		987	break;
		988	}
		989
		990	memcpy (names + memofs, name, len);
		991	memofs += len;
		992	}
		993	}
		994
		995	if (errno)
		996	res = -1;
		997
		998	req->result = res;
		999	}
		1000
		1001	/*****************************************************************************/
		1002
		1003	static void *aio_proc (void *thr_arg)
		1004	{
		1005	aio_req req;
		1006	worker *self = (worker *)thr_arg;
578		1007
579	for (;;)	1008	for (;;)
580	{	1009	{
581	errno = 0, readdir_r (dirp, &u.d, &entp);	1010	LOCK (reqlock);
582
583	if (!entp)
584	break;
585
586	name = entp->d_name;
587
588	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
589	{
590	int len = strlen (name) + 1;
591
592	res++;
593
594	while (memofs + len > memlen)
595	{
596	memlen *= 2;
597	names = realloc (names, memlen);
598	if (!names)
599	break;
600	}
601
602	memcpy (names + memofs, name, len);
603	memofs += len;
604	}
605	}
606
607	errorno = errno;
608	closedir (dirp);
609
610	if (errorno)
611	{
612	free (names);
613	errno = errorno;
614	res = -1;
615	}
616
617	*namesp = (void *)names;
618	return res;
619	}
620
621	/*****************************************************************************/
622
623	static void *
624	aio_proc (void *thr_arg)
625	{
626	aio_req req;
627	int type;
628
629	do
630	{
631	pthread_mutex_lock (&reqlock);
632		1011
633	for (;;)	1012	for (;;)
634	{	1013	{
635	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
636
637	if (reqs)
638	{
639	reqs = reqs->next;
640	if (!reqs) reqe = 0;
641	}
642		1015
643	if (req)	1016	if (req)
644	break;	1017	break;
645		1018
646	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
647	}	1020	}
648		1021
649	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
650		1025
651	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
652		1027
653	type = req->type;	1028	if (!(req->flags & FLAG_CANCELLED))
654
655	switch (type)	1029	switch (req->type)
656	{	1030	{
657	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1031	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1032	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
659		1033
660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1034	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
661	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
662		1036
663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
664	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
665	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
666		1040
667	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1041	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
668	case REQ_CLOSE: req->result = close (req->fd); break;	1042	case REQ_CLOSE: req->result = close (req->fd); break;
669	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
670	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
671	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
672	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
673	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
674		1048
675	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1049	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
676	case REQ_FSYNC: req->result = fsync (req->fd); break;	1050	case REQ_FSYNC: req->result = fsync (req->fd); break;
677	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1051	case REQ_READDIR: scandir_ (req, self); break;
678		1052
		1053	case REQ_BUSY:
		1054	{
		1055	struct timeval tv;
		1056
		1057	tv.tv_sec = req->fd;
		1058	tv.tv_usec = req->fd2;
		1059
		1060	req->result = select (0, 0, 0, 0, &tv);
		1061	}
		1062
		1063	case REQ_GROUP:
		1064	case REQ_NOP:
		1065	break;
		1066
679	case REQ_QUIT:	1067	case REQ_QUIT:
680	break;	1068	LOCK (wrklock);
		1069	worker_free (self);
		1070	--started;
		1071	UNLOCK (wrklock);
		1072	return 0;
681		1073
682	default:	1074	default:
683	req->result = ENOSYS;	1075	req->result = ENOSYS;
684	break;	1076	break;
685	}	1077	}
686		1078
687	req->errorno = errno;	1079	req->errorno = errno;
688		1080
689	pthread_mutex_lock (&reslock);	1081	LOCK (reslock);
690		1082
691	req->next = 0;	1083	++npending;
692		1084
693	if (rese)	1085	if (!reqq_push (&res_queue, req))
694	{
695	rese->next = req;
696	rese = req;
697	}
698	else
699	{
700	rese = ress = req;
701
702	/* write a dummy byte to the pipe so fh becomes ready */	1086	/* write a dummy byte to the pipe so fh becomes ready */
703	write (respipe [1], &respipe, 1);	1087	write (respipe [1], &respipe, 1);
704	}
705		1088
706	pthread_mutex_unlock (&reslock);	1089	self->req = 0;
707	}	1090	worker_clear (self);
708	while (type != REQ_QUIT);
709		1091
710	return 0;	1092	UNLOCK (reslock);
		1093	}
711	}	1094	}
712		1095
713	/*****************************************************************************/	1096	/*****************************************************************************/
714		1097
715	static void atfork_prepare (void)	1098	static void atfork_prepare (void)
716	{	1099	{
717	pthread_mutex_lock (&reqlock);	1100	LOCK (wrklock);
718	pthread_mutex_lock (&reslock);	1101	LOCK (reqlock);
		1102	LOCK (reslock);
719	#if !HAVE_PREADWRITE	1103	#if !HAVE_PREADWRITE
720	pthread_mutex_lock (&preadwritelock);	1104	LOCK (preadwritelock);
721	#endif	1105	#endif
722	#if !HAVE_READDIR_R	1106	#if !HAVE_READDIR_R
723	pthread_mutex_lock (&readdirlock);	1107	LOCK (readdirlock);
724	#endif	1108	#endif
725	}	1109	}
726		1110
727	static void atfork_parent (void)	1111	static void atfork_parent (void)
728	{	1112	{
729	#if !HAVE_READDIR_R	1113	#if !HAVE_READDIR_R
730	pthread_mutex_unlock (&readdirlock);	1114	UNLOCK (readdirlock);
731	#endif	1115	#endif
732	#if !HAVE_PREADWRITE	1116	#if !HAVE_PREADWRITE
733	pthread_mutex_unlock (&preadwritelock);	1117	UNLOCK (preadwritelock);
734	#endif	1118	#endif
735	pthread_mutex_unlock (&reslock);	1119	UNLOCK (reslock);
736	pthread_mutex_unlock (&reqlock);	1120	UNLOCK (reqlock);
		1121	UNLOCK (wrklock);
737	}	1122	}
738		1123
739	static void atfork_child (void)	1124	static void atfork_child (void)
740	{	1125	{
741	aio_req prv;	1126	aio_req prv;
742		1127
		1128	while (prv = reqq_shift (&req_queue))
		1129	req_free (prv);
		1130
		1131	while (prv = reqq_shift (&res_queue))
		1132	req_free (prv);
		1133
		1134	while (wrk_first.next != &wrk_first)
		1135	{
		1136	worker *wrk = wrk_first.next;
		1137
		1138	if (wrk->req)
		1139	req_free (wrk->req);
		1140
		1141	worker_clear (wrk);
		1142	worker_free (wrk);
		1143	}
		1144
743	started = 0;	1145	started = 0;
744		1146	nreqs = 0;
745	while (reqs)
746	{
747	prv = reqs;
748	reqs = prv->next;
749	free_req (prv);
750	}
751
752	reqs = reqe = 0;
753
754	while (ress)
755	{
756	prv = ress;
757	ress = prv->next;
758	free_req (prv);
759	}
760
761	ress = rese = 0;
762		1147
763	close (respipe [0]);	1148	close (respipe [0]);
764	close (respipe [1]);	1149	close (respipe [1]);
765	create_pipe ();	1150	create_pipe ();
766		1151
767	atfork_parent ();	1152	atfork_parent ();
768	}	1153	}
769		1154
770	#define dREQ \	1155	#define dREQ \
771	aio_req req; \	1156	aio_req req; \
		1157	int req_pri = next_pri; \
		1158	next_pri = DEFAULT_PRI + PRI_BIAS; \
772	\	1159	\
773	if (SvOK (callback) && !SvROK (callback)) \	1160	if (SvOK (callback) && !SvROK (callback)) \
774	croak ("clalback must be undef or of reference type"); \	1161	croak ("callback must be undef or of reference type"); \
775	\	1162	\
776	Newz (0, req, 1, aio_cb); \	1163	Newz (0, req, 1, aio_cb); \
777	if (!req) \	1164	if (!req) \
778	croak ("out of memory during aio_req allocation"); \	1165	croak ("out of memory during aio_req allocation"); \
779	\	1166	\
780	req->callback = newSVsv (callback);	1167	req->callback = newSVsv (callback); \
		1168	req->pri = req_pri
		1169
		1170	#define REQ_SEND \
		1171	req_send (req); \
		1172	\
		1173	if (GIMME_V != G_VOID) \
		1174	XPUSHs (req_sv (req, AIO_REQ_KLASS));
781		1175
782	MODULE = IO::AIO PACKAGE = IO::AIO	1176	MODULE = IO::AIO PACKAGE = IO::AIO
783		1177
784	PROTOTYPES: ENABLE	1178	PROTOTYPES: ENABLE
785		1179
…		…
790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1184	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1185	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
792		1186
793	create_pipe ();	1187	create_pipe ();
794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1188	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
795	}
796		1189
		1190	start_thread ();
		1191	}
		1192
797	void	1193	void
798	min_parallel (nthreads)	1194	min_parallel (int nthreads)
799	int nthreads
800	PROTOTYPE: $	1195	PROTOTYPE: $
801		1196
802	void	1197	void
803	max_parallel (nthreads)	1198	max_parallel (int nthreads)
804	int nthreads
805	PROTOTYPE: $	1199	PROTOTYPE: $
806		1200
807	int	1201	int
808	max_outstanding (nreqs)	1202	max_outstanding (int maxreqs)
809	int nreqs	1203	PROTOTYPE: $
810	PROTOTYPE: $
811	CODE:	1204	CODE:
812	RETVAL = max_outstanding;	1205	RETVAL = max_outstanding;
813	max_outstanding = nreqs;	1206	max_outstanding = maxreqs;
		1207	OUTPUT:
		1208	RETVAL
814		1209
815	void	1210	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1211	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
817	SV * pathname	1212	SV * pathname
818	int flags	1213	int flags
819	int mode	1214	int mode
820	SV * callback	1215	SV * callback
821	PROTOTYPE: $$$;$	1216	PROTOTYPE: $$$;$
822	CODE:	1217	PPCODE:
823	{	1218	{
824	dREQ;	1219	dREQ;
825		1220
826	req->type = REQ_OPEN;	1221	req->type = REQ_OPEN;
827	req->data = newSVsv (pathname);	1222	req->data = newSVsv (pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);	1223	req->dataptr = SvPVbyte_nolen (req->data);
829	req->fd = flags;	1224	req->fd = flags;
830	req->mode = mode;	1225	req->mode = mode;
831		1226
832	send_req (req);	1227	REQ_SEND;
833	}	1228	}
834		1229
835	void	1230	void
836	aio_close (fh,callback=&PL_sv_undef)	1231	aio_close (fh,callback=&PL_sv_undef)
837	SV * fh	1232	SV * fh
…		…
839	PROTOTYPE: $;$	1234	PROTOTYPE: $;$
840	ALIAS:	1235	ALIAS:
841	aio_close = REQ_CLOSE	1236	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	1237	aio_fsync = REQ_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	1238	aio_fdatasync = REQ_FDATASYNC
844	CODE:	1239	PPCODE:
845	{	1240	{
846	dREQ;	1241	dREQ;
847		1242
848	req->type = ix;	1243	req->type = ix;
849	req->fh = newSVsv (fh);	1244	req->fh = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1245	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
851		1246
852	send_req (req);	1247	REQ_SEND (req);
853	}	1248	}
854		1249
855	void	1250	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1251	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
857	SV * fh	1252	SV * fh
…		…
862	SV * callback	1257	SV * callback
863	ALIAS:	1258	ALIAS:
864	aio_read = REQ_READ	1259	aio_read = REQ_READ
865	aio_write = REQ_WRITE	1260	aio_write = REQ_WRITE
866	PROTOTYPE: $$$$$;$	1261	PROTOTYPE: $$$$$;$
867	CODE:	1262	PPCODE:
868	{	1263	{
869	aio_req req;	1264	aio_req req;
870	STRLEN svlen;	1265	STRLEN svlen;
871	char *svptr = SvPVbyte (data, svlen);	1266	char *svptr = SvPVbyte (data, svlen);
872		1267
…		…
910	{	1305	{
911	SvREADONLY_on (data);	1306	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	1307	req->data2ptr = (void *)data;
913	}	1308	}
914		1309
915	send_req (req);	1310	REQ_SEND;
916	}	1311	}
917	}	1312	}
918		1313
919	void	1314	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1315	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
…		…
922	SV * in_fh	1317	SV * in_fh
923	UV in_offset	1318	UV in_offset
924	UV length	1319	UV length
925	SV * callback	1320	SV * callback
926	PROTOTYPE: $$$$;$	1321	PROTOTYPE: $$$$;$
927	CODE:	1322	PPCODE:
928	{	1323	{
929	dREQ;	1324	dREQ;
930		1325
931	req->type = REQ_SENDFILE;	1326	req->type = REQ_SENDFILE;
932	req->fh = newSVsv (out_fh);	1327	req->fh = newSVsv (out_fh);
…		…
934	req->fh2 = newSVsv (in_fh);	1329	req->fh2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1330	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936	req->offset = in_offset;	1331	req->offset = in_offset;
937	req->length = length;	1332	req->length = length;
938		1333
939	send_req (req);	1334	REQ_SEND;
940	}	1335	}
941		1336
942	void	1337	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1338	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
944	SV * fh	1339	SV * fh
945	UV offset	1340	UV offset
946	IV length	1341	IV length
947	SV * callback	1342	SV * callback
948	PROTOTYPE: $$$;$	1343	PROTOTYPE: $$$;$
949	CODE:	1344	PPCODE:
950	{	1345	{
951	dREQ;	1346	dREQ;
952		1347
953	req->type = REQ_READAHEAD;	1348	req->type = REQ_READAHEAD;
954	req->fh = newSVsv (fh);	1349	req->fh = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1350	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
956	req->offset = offset;	1351	req->offset = offset;
957	req->length = length;	1352	req->length = length;
958		1353
959	send_req (req);	1354	REQ_SEND;
960	}	1355	}
961		1356
962	void	1357	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	1358	aio_stat (fh_or_path,callback=&PL_sv_undef)
964	SV * fh_or_path	1359	SV * fh_or_path
965	SV * callback	1360	SV * callback
966	ALIAS:	1361	ALIAS:
967	aio_stat = REQ_STAT	1362	aio_stat = REQ_STAT
968	aio_lstat = REQ_LSTAT	1363	aio_lstat = REQ_LSTAT
969	CODE:	1364	PPCODE:
970	{	1365	{
971	dREQ;	1366	dREQ;
972		1367
973	New (0, req->statdata, 1, Stat_t);	1368	New (0, req->statdata, 1, Stat_t);
974	if (!req->statdata)	1369	if (!req->statdata)
975	{	1370	{
976	free_req (req);	1371	req_free (req);
977	croak ("out of memory during aio_req->statdata allocation");	1372	croak ("out of memory during aio_req->statdata allocation");
978	}	1373	}
979		1374
980	if (SvPOK (fh_or_path))	1375	if (SvPOK (fh_or_path))
981	{	1376	{
…		…
988	req->type = REQ_FSTAT;	1383	req->type = REQ_FSTAT;
989	req->fh = newSVsv (fh_or_path);	1384	req->fh = newSVsv (fh_or_path);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1385	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
991	}	1386	}
992		1387
993	send_req (req);	1388	REQ_SEND;
994	}	1389	}
995		1390
996	void	1391	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	1392	aio_unlink (pathname,callback=&PL_sv_undef)
998	SV * pathname	1393	SV * pathname
999	SV * callback	1394	SV * callback
1000	ALIAS:	1395	ALIAS:
1001	aio_unlink = REQ_UNLINK	1396	aio_unlink = REQ_UNLINK
1002	aio_rmdir = REQ_RMDIR	1397	aio_rmdir = REQ_RMDIR
1003	aio_readdir = REQ_READDIR	1398	aio_readdir = REQ_READDIR
1004	CODE:	1399	PPCODE:
1005	{	1400	{
1006	dREQ;	1401	dREQ;
1007		1402
1008	req->type = ix;	1403	req->type = ix;
1009	req->data = newSVsv (pathname);	1404	req->data = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	1405	req->dataptr = SvPVbyte_nolen (req->data);
1011		1406
1012	send_req (req);	1407	REQ_SEND;
1013	}	1408	}
1014		1409
1015	void	1410	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1411	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1017	SV * oldpath	1412	SV * oldpath
…		…
1019	SV * callback	1414	SV * callback
1020	ALIAS:	1415	ALIAS:
1021	aio_link = REQ_LINK	1416	aio_link = REQ_LINK
1022	aio_symlink = REQ_SYMLINK	1417	aio_symlink = REQ_SYMLINK
1023	aio_rename = REQ_RENAME	1418	aio_rename = REQ_RENAME
1024	CODE:	1419	PPCODE:
1025	{	1420	{
1026	dREQ;	1421	dREQ;
1027		1422
1028	req->type = ix;	1423	req->type = ix;
1029	req->fh = newSVsv (oldpath);	1424	req->fh = newSVsv (oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	1425	req->data2ptr = SvPVbyte_nolen (req->fh);
1031	req->data = newSVsv (newpath);	1426	req->data = newSVsv (newpath);
1032	req->dataptr = SvPVbyte_nolen (req->data);	1427	req->dataptr = SvPVbyte_nolen (req->data);
1033		1428
1034	send_req (req);	1429	REQ_SEND;
1035	}	1430	}
		1431
		1432	void
		1433	aio_busy (delay,callback=&PL_sv_undef)
		1434	double delay
		1435	SV * callback
		1436	PPCODE:
		1437	{
		1438	dREQ;
		1439
		1440	req->type = REQ_BUSY;
		1441	req->fd = delay < 0. ? 0 : delay;
		1442	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1443
		1444	REQ_SEND;
		1445	}
		1446
		1447	void
		1448	aio_group (callback=&PL_sv_undef)
		1449	SV * callback
		1450	PROTOTYPE: ;$
		1451	PPCODE:
		1452	{
		1453	dREQ;
		1454
		1455	req->type = REQ_GROUP;
		1456	req_send (req);
		1457
		1458	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1459	}
		1460
		1461	void
		1462	aio_nop (callback=&PL_sv_undef)
		1463	SV * callback
		1464	PPCODE:
		1465	{
		1466	dREQ;
		1467
		1468	req->type = REQ_NOP;
		1469
		1470	REQ_SEND;
		1471	}
		1472
		1473	int
		1474	aioreq_pri (int pri = 0)
		1475	PROTOTYPE: ;$
		1476	CODE:
		1477	RETVAL = next_pri - PRI_BIAS;
		1478	if (items > 0)
		1479	{
		1480	if (pri < PRI_MIN) pri = PRI_MIN;
		1481	if (pri > PRI_MAX) pri = PRI_MAX;
		1482	next_pri = pri + PRI_BIAS;
		1483	}
		1484	OUTPUT:
		1485	RETVAL
		1486
		1487	void
		1488	aioreq_nice (int nice = 0)
		1489	CODE:
		1490	nice = next_pri - nice;
		1491	if (nice < PRI_MIN) nice = PRI_MIN;
		1492	if (nice > PRI_MAX) nice = PRI_MAX;
		1493	next_pri = nice + PRI_BIAS;
1036		1494
1037	void	1495	void
1038	flush ()	1496	flush ()
1039	PROTOTYPE:	1497	PROTOTYPE:
1040	CODE:	1498	CODE:
1041	while (nreqs)	1499	while (nreqs)
1042	{	1500	{
1043	poll_wait ();	1501	poll_wait ();
1044	poll_cb ();	1502	poll_cb (0);
1045	}	1503	}
1046		1504
1047	void	1505	void
1048	poll()	1506	poll()
1049	PROTOTYPE:	1507	PROTOTYPE:
1050	CODE:	1508	CODE:
1051	if (nreqs)	1509	if (nreqs)
1052	{	1510	{
1053	poll_wait ();	1511	poll_wait ();
1054	poll_cb ();	1512	poll_cb (0);
1055	}	1513	}
1056		1514
1057	int	1515	int
1058	poll_fileno()	1516	poll_fileno()
1059	PROTOTYPE:	1517	PROTOTYPE:
…		…
1064		1522
1065	int	1523	int
1066	poll_cb(...)	1524	poll_cb(...)
1067	PROTOTYPE:	1525	PROTOTYPE:
1068	CODE:	1526	CODE:
1069	RETVAL = poll_cb ();	1527	RETVAL = poll_cb (0);
		1528	OUTPUT:
		1529	RETVAL
		1530
		1531	int
		1532	poll_some(int max = 0)
		1533	PROTOTYPE: $
		1534	CODE:
		1535	RETVAL = poll_cb (max);
1070	OUTPUT:	1536	OUTPUT:
1071	RETVAL	1537	RETVAL
1072		1538
1073	void	1539	void
1074	poll_wait()	1540	poll_wait()
…		…
1083	CODE:	1549	CODE:
1084	RETVAL = nreqs;	1550	RETVAL = nreqs;
1085	OUTPUT:	1551	OUTPUT:
1086	RETVAL	1552	RETVAL
1087		1553
		1554	int
		1555	nready()
		1556	PROTOTYPE:
		1557	CODE:
		1558	RETVAL = get_nready ();
		1559	OUTPUT:
		1560	RETVAL
		1561
		1562	int
		1563	npending()
		1564	PROTOTYPE:
		1565	CODE:
		1566	RETVAL = get_npending ();
		1567	OUTPUT:
		1568	RETVAL
		1569
		1570	PROTOTYPES: DISABLE
		1571
		1572	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1573
		1574	void
		1575	cancel (aio_req_ornot req)
		1576	CODE:
		1577	req_cancel (req);
		1578
		1579	void
		1580	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1581	CODE:
		1582	SvREFCNT_dec (req->callback);
		1583	req->callback = newSVsv (callback);
		1584
		1585	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1586
		1587	void
		1588	add (aio_req grp, ...)
		1589	PPCODE:
		1590	{
		1591	int i;
		1592	aio_req req;
		1593
		1594	if (grp->fd == 2)
		1595	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1596
		1597	for (i = 1; i < items; ++i )
		1598	{
		1599	if (GIMME_V != G_VOID)
		1600	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1601
		1602	req = SvAIO_REQ (ST (i));
		1603
		1604	if (req)
		1605	{
		1606	++grp->length;
		1607	req->grp = grp;
		1608
		1609	req->grp_prev = 0;
		1610	req->grp_next = grp->grp_first;
		1611
		1612	if (grp->grp_first)
		1613	grp->grp_first->grp_prev = req;
		1614
		1615	grp->grp_first = req;
		1616	}
		1617	}
		1618	}
		1619
		1620	void
		1621	cancel_subs (aio_req_ornot req)
		1622	CODE:
		1623	req_cancel_subs (req);
		1624
		1625	void
		1626	result (aio_req grp, ...)
		1627	CODE:
		1628	{
		1629	int i;
		1630	AV *av;
		1631
		1632	grp->errorno = errno;
		1633
		1634	av = newAV ();
		1635
		1636	for (i = 1; i < items; ++i )
		1637	av_push (av, newSVsv (ST (i)));
		1638
		1639	SvREFCNT_dec (grp->data);
		1640	grp->data = (SV *)av;
		1641	}
		1642
		1643	void
		1644	errno (aio_req grp, int errorno = errno)
		1645	CODE:
		1646	grp->errorno = errorno;
		1647
		1648	void
		1649	limit (aio_req grp, int limit)
		1650	CODE:
		1651	grp->fd2 = limit;
		1652	aio_grp_feed (grp);
		1653
		1654	void
		1655	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1656	CODE:
		1657	{
		1658	SvREFCNT_dec (grp->fh2);
		1659	grp->fh2 = newSVsv (callback);
		1660
		1661	if (grp->fd2 <= 0)
		1662	grp->fd2 = 2;
		1663
		1664	aio_grp_feed (grp);
		1665	}
		1666

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