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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC vs.
Revision 1.80 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"
…		…
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 <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
13	#include <sys/types.h>	25	#include <sys/types.h>
14	#include <sys/stat.h>	26	#include <sys/stat.h>
15	#include <limits.h>	27	#include <limits.h>
16	#include <unistd.h>	28	#include <unistd.h>
17	#include <fcntl.h>	29	#include <fcntl.h>
…		…
31	# else	43	# else
32	# error sendfile support requested but not available	44	# error sendfile support requested but not available
33	# endif	45	# endif
34	#endif	46	#endif
35		47
		48	/* used for struct dirent, AIX doesn't provide it */
		49	#ifndef NAME_MAX
		50	# define NAME_MAX 4096
		51	#endif
		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
36	#if __ia64	58	#if __ia64
37	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
38	#else	62	#else
39	# 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
40	#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;
41		88
42	enum {	89	enum {
43	REQ_QUIT,	90	REQ_QUIT,
44	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
46	REQ_SENDFILE,	93	REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
48	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
50	REQ_READDIR,	97	REQ_READDIR,
51	REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
		99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
52	};	101	};
53		102
		103	#define AIO_REQ_KLASS "IO::AIO::REQ"
		104	#define AIO_GRP_KLASS "IO::AIO::GRP"
		105
54	typedef struct aio_cb {	106	typedef struct aio_cb
		107	{
55	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
56		109
57	int type;	110	SV *data, *callback;
58		111	SV *fh, *fh2;
59	/* should receive a cleanup, with unions */	112	void *dataptr, *data2ptr;
60	int fd, fd2;	113	Stat_t *statdata;
61	off_t offset;	114	off_t offset;
62	size_t length;	115	size_t length;
63	ssize_t result;	116	ssize_t result;
		117
		118	STRLEN dataoffset;
		119	int type;
		120	int fd, fd2;
		121	int errorno;
64	mode_t mode; /* open */	122	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70		123
71	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;
72	} aio_cb;	129	} aio_cb;
73		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
		134
74	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
		136	typedef aio_cb *aio_req_ornot;
75		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
76	static int started, wanted;	149	static unsigned int started, wanted;
77	static volatile int nreqs;	150
78	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;
79	static int respipe [2];	202	static int respipe [2];
80		203
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
84		207
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
86	static volatile aio_req ress, rese; /* queue start, queue end */
87		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
88	static void free_req (aio_req req)	479	static void req_free (aio_req req)
89	{	480	{
90	if (req->data)	481	if (req->self)
		482	{
		483	sv_unmagic (req->self, PERL_MAGIC_ext);
		484	SvREFCNT_dec (req->self);
		485	}
		486
91	SvREFCNT_dec (req->data);	487	SvREFCNT_dec (req->data);
92
93	if (req->fh)
94	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
95
96	if (req->fh2)
97	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
		491	Safefree (req->statdata);
104		492
105	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
106	free (req->data2ptr);	494	free (req->data2ptr);
107		495
108	Safefree (req);	496	Safefree (req);
109	}	497	}
110		498
111	static void	499	static void req_cancel_subs (aio_req grp)
112	poll_wait ()
113	{	500	{
114	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;
115	{	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	{
116	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
117	FD_ZERO(&rfd);	653	FD_ZERO(&rfd);
118	FD_SET(respipe [0], &rfd);	654	FD_SET(respipe [0], &rfd);
119		655
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	656	select (respipe [0] + 1, &rfd, 0, 0, 0);
121	}	657	}
122	}	658	}
123		659
124	static int	660	static int poll_cb (int max)
125	poll_cb ()
126	{	661	{
127	dSP;	662	dSP;
128	int count = 0;	663	int count = 0;
129	int do_croak = 0;	664	int do_croak = 0;
130	aio_req req;	665	aio_req req;
131		666
132	for (;;)	667	for (;;)
133	{	668	{
134	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
135	req = ress;
136
137	if (req)
138	{	670	{
139	ress = req->next;	671	maybe_start_thread ();
140		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
141	if (!ress)	676	if (req)
142	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
143	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
144	char buf [32];	683	char buf [32];
145	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
146	;	686	}
147
148	rese = 0;
149	}	687	}
150	}
151		688
152	pthread_mutex_unlock (&reslock);	689	UNLOCK (reslock);
153		690
154	if (!req)	691	if (!req)
155	break;	692	break;
156		693
157	nreqs--;	694	--nreqs;
158		695
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)	696	if (req->type == REQ_GROUP && req->length)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{	697	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	698	req->fd = 1; /* mark request as delayed */
175	PL_laststatval = req->result;	699	continue;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}	700	}
205	else	701	else
206	{	702	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));
208
209	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)
210	{	710	{
211	/* convert fd to fh */	711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
212	SV *fh;	712	PL_laststatval = req->result;
213		713	PL_statcache = *(req->statdata);
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}	714	}
		715
		716	req_invoke (req);
		717
		718	count++;
223	}	719	}
224		720
225	if (SvOK (req->callback))	721	req_free (req);
226	{
227	PUTBACK;
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230
231	if (SvTRUE (ERRSV))
232	{
233	free_req (req);
234	croak (0);
235	}
236	}
237
238	LEAVE;
239
240	errno = errorno;
241	count++;
242	}	722	}
243		723
244	free_req (req);	724	if (nreqs <= max_outstanding)
		725	break;
		726
		727	poll_wait ();
		728
		729	max = 0;
245	}	730	}
246		731
247	return count;	732	return count;
248	}
249
250	static void *aio_proc(void *arg);
251
252	static void
253	start_thread (void)
254	{
255	sigset_t fullsigset, oldsigset;
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}
271
272	static void
273	send_req (aio_req req)
274	{
275	while (started < wanted && nreqs >= started)
276	start_thread ();
277
278	nreqs++;
279
280	pthread_mutex_lock (&reqlock);
281
282	req->next = 0;
283
284	if (reqe)
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}
306
307	static void
308	end_thread (void)
309	{
310	aio_req req;
311	Newz (0, req, 1, aio_cb);
312	req->type = REQ_QUIT;
313
314	send_req (req);
315	}
316
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}	733	}
342		734
343	static void create_pipe ()	735	static void create_pipe ()
344	{	736	{
345	if (pipe (respipe))	737	if (pipe (respipe))
…		…
364	* 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,
365	* but that's your problem, not mine.	757	* but that's your problem, not mine.
366	*/	758	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368		760
369	static ssize_t	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
370	pread (int fd, void *buf, size_t count, off_t offset)
371	{	762	{
372	ssize_t res;	763	ssize_t res;
373	off_t ooffset;	764	off_t ooffset;
374		765
375	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);	769	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
381		772
382	return res;	773	return res;
383	}	774	}
384		775
385	static ssize_t
386	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)
387	{	777	{
388	ssize_t res;	778	ssize_t res;
389	off_t ooffset;	779	off_t ooffset;
390		780
391	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);	784	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
397		787
398	return res;	788	return res;
399	}	789	}
400	#endif	790	#endif
401		791
402	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
403	# define fdatasync fsync	793	# define fdatasync fsync
404	#endif	794	#endif
405		795
406	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
407	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
408		798
409	static ssize_t	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
410	readahead (int fd, off_t offset, size_t count)
411	{	800	{
412	char readahead_buf[4096];	801	dBUF;
413		802
414	while (count > 0)	803	while (count > 0)
415	{	804	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
417		806
418	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
419	offset += len;	808	offset += len;
420	count -= len;	809	count -= len;
421	}	810	}
422		811
423	errno = 0;	812	errno = 0;
424	}	813	}
		814
425	#endif	815	#endif
426		816
427	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
429		819
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431		821
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{	823	{
435	struct dirent *e;	824	struct dirent *e;
436	int errorno;	825	int errorno;
437		826
438	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
439		828
440	e = readdir (dirp);	829	e = readdir (dirp);
441	errorno = errno;	830	errorno = errno;
442		831
443	if (e)	832	if (e)
…		…
446	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
447	}	836	}
448	else	837	else
449	*res = 0;	838	*res = 0;
450		839
451	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
452		841
453	errno = errorno;	842	errno = errorno;
454	return e ? 0 : -1;	843	return e ? 0 : -1;
455	}	844	}
456	#endif	845	#endif
457		846
458	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
459	static ssize_t
460	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)
461	{	849	{
462	ssize_t res;	850	ssize_t res;
463		851
464	if (!count)	852	if (!count)
465	return 0;	853	return 0;
…		…
476	{	864	{
477	off_t sbytes;	865	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479		867
480	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
482	res = sbytes;	870	res = sbytes;
483	}	871	}
484		872
485	# elif __hpux	873	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
514	#endif	902	#endif
515	)	903	)
516	)	904	)
517	{	905	{
518	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];	907	dBUF;
		908
520	res = 0;	909	res = 0;
521		910
522	while (count)	911	while (count)
523	{	912	{
524	ssize_t cnt;	913	ssize_t cnt;
525		914
526	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
527		916
528	if (cnt <= 0)	917	if (cnt <= 0)
529	{	918	{
530	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
531	break;	920	break;
532	}	921	}
533		922
534	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
535		924
536	if (cnt <= 0)	925	if (cnt <= 0)
537	{	926	{
538	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
539	break;	928	break;
…		…
547		936
548	return res;	937	return res;
549	}	938	}
550		939
551	/* read a full directory */	940	/* read a full directory */
552	static int	941	static void scandir_ (aio_req req, worker *self)
553	scandir_ (const char *path, void **namesp)
554	{	942	{
555	DIR *dirp = opendir (path);	943	DIR *dirp;
556	union	944	union
557	{	945	{
558	struct dirent d;	946	struct dirent d;
559	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
560	} u;	948	} *u;
561	struct dirent *entp;	949	struct dirent *entp;
562	char *name, *names;	950	char *name, *names;
563	int memlen = 4096;	951	int memlen = 4096;
564	int memofs = 0;	952	int memofs = 0;
565	int res = 0;	953	int res = 0;
566	int errorno;	954	int errorno;
567		955
568	if (!dirp)	956	LOCK (wrklock);
569	return -1;	957	self->dirp = dirp = opendir (req->dataptr);
570		958	self->dbuf = u = malloc (sizeof (*u));
571	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;
572		1007
573	for (;;)	1008	for (;;)
574	{	1009	{
575	errno = 0, readdir_r (dirp, &u.d, &entp);	1010	LOCK (reqlock);
576
577	if (!entp)
578	break;
579
580	name = entp->d_name;
581
582	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
583	{
584	int len = strlen (name) + 1;
585
586	res++;
587
588	while (memofs + len > memlen)
589	{
590	memlen *= 2;
591	names = realloc (names, memlen);
592	if (!names)
593	break;
594	}
595
596	memcpy (names + memofs, name, len);
597	memofs += len;
598	}
599	}
600
601	errorno = errno;
602	closedir (dirp);
603
604	if (errorno)
605	{
606	free (names);
607	errno = errorno;
608	res = -1;
609	}
610
611	*namesp = (void *)names;
612	return res;
613	}
614
615	/*****************************************************************************/
616
617	static void *
618	aio_proc (void *thr_arg)
619	{
620	aio_req req;
621	int type;
622
623	do
624	{
625	pthread_mutex_lock (&reqlock);
626		1011
627	for (;;)	1012	for (;;)
628	{	1013	{
629	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
630
631	if (reqs)
632	{
633	reqs = reqs->next;
634	if (!reqs) reqe = 0;
635	}
636		1015
637	if (req)	1016	if (req)
638	break;	1017	break;
639		1018
640	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
641	}	1020	}
642		1021
643	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
644		1025
645	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
646		1027
647	type = req->type;	1028	if (!(req->flags & FLAG_CANCELLED))
648
649	switch (type)	1029	switch (req->type)
650	{	1030	{
651	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;
652	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;
653		1033
654	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;
655	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;
656		1036
657	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
658	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
659	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
660		1040
661	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;
662	case REQ_CLOSE: req->result = close (req->fd); break;	1042	case REQ_CLOSE: req->result = close (req->fd); break;
663	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
664	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
665	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
666		1048
667	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1049	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
668	case REQ_FSYNC: req->result = fsync (req->fd); break;	1050	case REQ_FSYNC: req->result = fsync (req->fd); break;
669	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1051	case REQ_READDIR: scandir_ (req, self); break;
670		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
671	case REQ_QUIT:	1067	case REQ_QUIT:
672	break;	1068	LOCK (wrklock);
		1069	worker_free (self);
		1070	--started;
		1071	UNLOCK (wrklock);
		1072	return 0;
673		1073
674	default:	1074	default:
675	req->result = ENOSYS;	1075	req->result = ENOSYS;
676	break;	1076	break;
677	}	1077	}
678		1078
679	req->errorno = errno;	1079	req->errorno = errno;
680		1080
681	pthread_mutex_lock (&reslock);	1081	LOCK (reslock);
682		1082
683	req->next = 0;	1083	++npending;
684		1084
685	if (rese)	1085	if (!reqq_push (&res_queue, req))
686	{
687	rese->next = req;
688	rese = req;
689	}
690	else
691	{
692	rese = ress = req;
693
694	/* write a dummy byte to the pipe so fh becomes ready */	1086	/* write a dummy byte to the pipe so fh becomes ready */
695	write (respipe [1], &respipe, 1);	1087	write (respipe [1], &respipe, 1);
696	}
697		1088
698	pthread_mutex_unlock (&reslock);	1089	self->req = 0;
699	}	1090	worker_clear (self);
700	while (type != REQ_QUIT);
701		1091
702	return 0;	1092	UNLOCK (reslock);
		1093	}
703	}	1094	}
704		1095
705	/*****************************************************************************/	1096	/*****************************************************************************/
706		1097
707	static void atfork_prepare (void)	1098	static void atfork_prepare (void)
708	{	1099	{
709	pthread_mutex_lock (&reqlock);	1100	LOCK (wrklock);
710	pthread_mutex_lock (&reslock);	1101	LOCK (reqlock);
		1102	LOCK (reslock);
711	#if !HAVE_PREADWRITE	1103	#if !HAVE_PREADWRITE
712	pthread_mutex_lock (&preadwritelock);	1104	LOCK (preadwritelock);
713	#endif	1105	#endif
714	#if !HAVE_READDIR_R	1106	#if !HAVE_READDIR_R
715	pthread_mutex_lock (&readdirlock);	1107	LOCK (readdirlock);
716	#endif	1108	#endif
717	}	1109	}
718		1110
719	static void atfork_parent (void)	1111	static void atfork_parent (void)
720	{	1112	{
721	#if !HAVE_READDIR_R	1113	#if !HAVE_READDIR_R
722	pthread_mutex_unlock (&readdirlock);	1114	UNLOCK (readdirlock);
723	#endif	1115	#endif
724	#if !HAVE_PREADWRITE	1116	#if !HAVE_PREADWRITE
725	pthread_mutex_unlock (&preadwritelock);	1117	UNLOCK (preadwritelock);
726	#endif	1118	#endif
727	pthread_mutex_unlock (&reslock);	1119	UNLOCK (reslock);
728	pthread_mutex_unlock (&reqlock);	1120	UNLOCK (reqlock);
		1121	UNLOCK (wrklock);
729	}	1122	}
730		1123
731	static void atfork_child (void)	1124	static void atfork_child (void)
732	{	1125	{
733	aio_req prv;	1126	aio_req prv;
734		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
735	started = 0;	1145	started = 0;
736		1146	nreqs = 0;
737	while (reqs)
738	{
739	prv = reqs;
740	reqs = prv->next;
741	free_req (prv);
742	}
743
744	reqs = reqe = 0;
745
746	while (ress)
747	{
748	prv = ress;
749	ress = prv->next;
750	free_req (prv);
751	}
752
753	ress = rese = 0;
754		1147
755	close (respipe [0]);	1148	close (respipe [0]);
756	close (respipe [1]);	1149	close (respipe [1]);
757	create_pipe ();	1150	create_pipe ();
758		1151
759	atfork_parent ();	1152	atfork_parent ();
760	}	1153	}
761		1154
762	#define dREQ \	1155	#define dREQ \
763	aio_req req; \	1156	aio_req req; \
		1157	int req_pri = next_pri; \
		1158	next_pri = DEFAULT_PRI + PRI_BIAS; \
764	\	1159	\
765	if (SvOK (callback) && !SvROK (callback)) \	1160	if (SvOK (callback) && !SvROK (callback)) \
766	croak ("clalback must be undef or of reference type"); \	1161	croak ("callback must be undef or of reference type"); \
767	\	1162	\
768	Newz (0, req, 1, aio_cb); \	1163	Newz (0, req, 1, aio_cb); \
769	if (!req) \	1164	if (!req) \
770	croak ("out of memory during aio_req allocation"); \	1165	croak ("out of memory during aio_req allocation"); \
771	\	1166	\
772	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));
773		1175
774	MODULE = IO::AIO PACKAGE = IO::AIO	1176	MODULE = IO::AIO PACKAGE = IO::AIO
775		1177
776	PROTOTYPES: ENABLE	1178	PROTOTYPES: ENABLE
777		1179
778	BOOT:	1180	BOOT:
779	{	1181	{
		1182	HV *stash = gv_stashpv ("IO::AIO", 1);
		1183	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1184	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1185	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1186
780	create_pipe ();	1187	create_pipe ();
781	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1188	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
782	}
783		1189
		1190	start_thread ();
		1191	}
		1192
784	void	1193	void
785	min_parallel(nthreads)	1194	min_parallel (int nthreads)
786	int nthreads
787	PROTOTYPE: $	1195	PROTOTYPE: $
788		1196
789	void	1197	void
790	max_parallel(nthreads)	1198	max_parallel (int nthreads)
791	int nthreads
792	PROTOTYPE: $	1199	PROTOTYPE: $
793		1200
794	int	1201	int
795	max_outstanding(nreqs)	1202	max_outstanding (int maxreqs)
796	int nreqs	1203	PROTOTYPE: $
797	PROTOTYPE: $
798	CODE:	1204	CODE:
799	RETVAL = max_outstanding;	1205	RETVAL = max_outstanding;
800	max_outstanding = nreqs;	1206	max_outstanding = maxreqs;
		1207	OUTPUT:
		1208	RETVAL
801		1209
802	void	1210	void
803	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1211	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
804	SV * pathname	1212	SV * pathname
805	int flags	1213	int flags
806	int mode	1214	int mode
807	SV * callback	1215	SV * callback
808	PROTOTYPE: $$$;$	1216	PROTOTYPE: $$$;$
809	CODE:	1217	PPCODE:
810	{	1218	{
811	dREQ;	1219	dREQ;
812		1220
813	req->type = REQ_OPEN;	1221	req->type = REQ_OPEN;
814	req->data = newSVsv (pathname);	1222	req->data = newSVsv (pathname);
815	req->dataptr = SvPVbyte_nolen (req->data);	1223	req->dataptr = SvPVbyte_nolen (req->data);
816	req->fd = flags;	1224	req->fd = flags;
817	req->mode = mode;	1225	req->mode = mode;
818		1226
819	send_req (req);	1227	REQ_SEND;
820	}	1228	}
821		1229
822	void	1230	void
823	aio_close(fh,callback=&PL_sv_undef)	1231	aio_close (fh,callback=&PL_sv_undef)
824	SV * fh	1232	SV * fh
825	SV * callback	1233	SV * callback
826	PROTOTYPE: $;$	1234	PROTOTYPE: $;$
827	ALIAS:	1235	ALIAS:
828	aio_close = REQ_CLOSE	1236	aio_close = REQ_CLOSE
829	aio_fsync = REQ_FSYNC	1237	aio_fsync = REQ_FSYNC
830	aio_fdatasync = REQ_FDATASYNC	1238	aio_fdatasync = REQ_FDATASYNC
831	CODE:	1239	PPCODE:
832	{	1240	{
833	dREQ;	1241	dREQ;
834		1242
835	req->type = ix;	1243	req->type = ix;
836	req->fh = newSVsv (fh);	1244	req->fh = newSVsv (fh);
837	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1245	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
838		1246
839	send_req (req);	1247	REQ_SEND (req);
840	}	1248	}
841		1249
842	void	1250	void
843	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1251	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
844	SV * fh	1252	SV * fh
845	UV offset	1253	UV offset
846	UV length	1254	UV length
847	SV * data	1255	SV * data
848	UV dataoffset	1256	UV dataoffset
849	SV * callback	1257	SV * callback
850	ALIAS:	1258	ALIAS:
851	aio_read = REQ_READ	1259	aio_read = REQ_READ
852	aio_write = REQ_WRITE	1260	aio_write = REQ_WRITE
853	PROTOTYPE: $$$$$;$	1261	PROTOTYPE: $$$$$;$
854	CODE:	1262	PPCODE:
855	{	1263	{
856	aio_req req;	1264	aio_req req;
857	STRLEN svlen;	1265	STRLEN svlen;
858	char *svptr = SvPVbyte (data, svlen);	1266	char *svptr = SvPVbyte (data, svlen);
859		1267
…		…
897	{	1305	{
898	SvREADONLY_on (data);	1306	SvREADONLY_on (data);
899	req->data2ptr = (void *)data;	1307	req->data2ptr = (void *)data;
900	}	1308	}
901		1309
902	send_req (req);	1310	REQ_SEND;
903	}	1311	}
904	}	1312	}
905		1313
906	void	1314	void
907	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1315	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
908	SV * out_fh	1316	SV * out_fh
909	SV * in_fh	1317	SV * in_fh
910	UV in_offset	1318	UV in_offset
911	UV length	1319	UV length
912	SV * callback	1320	SV * callback
913	PROTOTYPE: $$$$;$	1321	PROTOTYPE: $$$$;$
914	CODE:	1322	PPCODE:
915	{	1323	{
916	dREQ;	1324	dREQ;
917		1325
918	req->type = REQ_SENDFILE;	1326	req->type = REQ_SENDFILE;
919	req->fh = newSVsv (out_fh);	1327	req->fh = newSVsv (out_fh);
…		…
921	req->fh2 = newSVsv (in_fh);	1329	req->fh2 = newSVsv (in_fh);
922	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1330	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
923	req->offset = in_offset;	1331	req->offset = in_offset;
924	req->length = length;	1332	req->length = length;
925		1333
926	send_req (req);	1334	REQ_SEND;
927	}	1335	}
928		1336
929	void	1337	void
930	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1338	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
931	SV * fh	1339	SV * fh
932	UV offset	1340	UV offset
933	IV length	1341	IV length
934	SV * callback	1342	SV * callback
935	PROTOTYPE: $$$;$	1343	PROTOTYPE: $$$;$
936	CODE:	1344	PPCODE:
937	{	1345	{
938	dREQ;	1346	dREQ;
939		1347
940	req->type = REQ_READAHEAD;	1348	req->type = REQ_READAHEAD;
941	req->fh = newSVsv (fh);	1349	req->fh = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1350	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
943	req->offset = offset;	1351	req->offset = offset;
944	req->length = length;	1352	req->length = length;
945		1353
946	send_req (req);	1354	REQ_SEND;
947	}	1355	}
948		1356
949	void	1357	void
950	aio_stat(fh_or_path,callback=&PL_sv_undef)	1358	aio_stat (fh_or_path,callback=&PL_sv_undef)
951	SV * fh_or_path	1359	SV * fh_or_path
952	SV * callback	1360	SV * callback
953	ALIAS:	1361	ALIAS:
954	aio_stat = REQ_STAT	1362	aio_stat = REQ_STAT
955	aio_lstat = REQ_LSTAT	1363	aio_lstat = REQ_LSTAT
956	CODE:	1364	PPCODE:
957	{	1365	{
958	dREQ;	1366	dREQ;
959		1367
960	New (0, req->statdata, 1, Stat_t);	1368	New (0, req->statdata, 1, Stat_t);
961	if (!req->statdata)	1369	if (!req->statdata)
962	{	1370	{
963	free_req (req);	1371	req_free (req);
964	croak ("out of memory during aio_req->statdata allocation");	1372	croak ("out of memory during aio_req->statdata allocation");
965	}	1373	}
966		1374
967	if (SvPOK (fh_or_path))	1375	if (SvPOK (fh_or_path))
968	{	1376	{
…		…
975	req->type = REQ_FSTAT;	1383	req->type = REQ_FSTAT;
976	req->fh = newSVsv (fh_or_path);	1384	req->fh = newSVsv (fh_or_path);
977	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1385	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
978	}	1386	}
979		1387
980	send_req (req);	1388	REQ_SEND;
981	}	1389	}
982		1390
983	void	1391	void
984	aio_unlink(pathname,callback=&PL_sv_undef)	1392	aio_unlink (pathname,callback=&PL_sv_undef)
985	SV * pathname	1393	SV * pathname
986	SV * callback	1394	SV * callback
987	ALIAS:	1395	ALIAS:
988	aio_unlink = REQ_UNLINK	1396	aio_unlink = REQ_UNLINK
989	aio_rmdir = REQ_RMDIR	1397	aio_rmdir = REQ_RMDIR
		1398	aio_readdir = REQ_READDIR
990	CODE:	1399	PPCODE:
991	{	1400	{
992	dREQ;	1401	dREQ;
993		1402
994	req->type = ix;	1403	req->type = ix;
995	req->data = newSVsv (pathname);	1404	req->data = newSVsv (pathname);
996	req->dataptr = SvPVbyte_nolen (req->data);	1405	req->dataptr = SvPVbyte_nolen (req->data);
997		1406
998	send_req (req);	1407	REQ_SEND;
999	}	1408	}
1000		1409
1001	void	1410	void
1002	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1411	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1003	SV * oldpath	1412	SV * oldpath
1004	SV * newpath	1413	SV * newpath
1005	SV * callback	1414	SV * callback
		1415	ALIAS:
		1416	aio_link = REQ_LINK
		1417	aio_symlink = REQ_SYMLINK
		1418	aio_rename = REQ_RENAME
1006	CODE:	1419	PPCODE:
1007	{	1420	{
1008	dREQ;	1421	dREQ;
1009		1422
1010	req->type = REQ_SYMLINK;	1423	req->type = ix;
1011	req->fh = newSVsv (oldpath);	1424	req->fh = newSVsv (oldpath);
1012	req->data2ptr = SvPVbyte_nolen (req->fh);	1425	req->data2ptr = SvPVbyte_nolen (req->fh);
1013	req->data = newSVsv (newpath);	1426	req->data = newSVsv (newpath);
1014	req->dataptr = SvPVbyte_nolen (req->data);	1427	req->dataptr = SvPVbyte_nolen (req->data);
1015		1428
1016	send_req (req);	1429	REQ_SEND;
1017	}	1430	}
1018		1431
1019	void	1432	void
1020	aio_readdir(pathname,callback=&PL_sv_undef)	1433	aio_busy (delay,callback=&PL_sv_undef)
1021	SV * pathname	1434	double delay
1022	SV * callback	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: ;$
1023	CODE:	1476	CODE:
1024	{	1477	RETVAL = next_pri - PRI_BIAS;
1025	dREQ;	1478	if (items > 0)
1026		1479	{
1027	req->type = REQ_READDIR;	1480	if (pri < PRI_MIN) pri = PRI_MIN;
1028	req->data = newSVsv (pathname);	1481	if (pri > PRI_MAX) pri = PRI_MAX;
1029	req->dataptr = SvPVbyte_nolen (req->data);	1482	next_pri = pri + PRI_BIAS;
1030		1483	}
1031	send_req (req);	1484	OUTPUT:
1032	}	1485	RETVAL
1033		1486
1034	void	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;
		1494
		1495	void
1035	flush()	1496	flush ()
1036	PROTOTYPE:	1497	PROTOTYPE:
1037	CODE:	1498	CODE:
1038	while (nreqs)	1499	while (nreqs)
1039	{	1500	{
1040	poll_wait ();	1501	poll_wait ();
1041	poll_cb ();	1502	poll_cb (0);
1042	}	1503	}
1043		1504
1044	void	1505	void
1045	poll()	1506	poll()
1046	PROTOTYPE:	1507	PROTOTYPE:
1047	CODE:	1508	CODE:
1048	if (nreqs)	1509	if (nreqs)
1049	{	1510	{
1050	poll_wait ();	1511	poll_wait ();
1051	poll_cb ();	1512	poll_cb (0);
1052	}	1513	}
1053		1514
1054	int	1515	int
1055	poll_fileno()	1516	poll_fileno()
1056	PROTOTYPE:	1517	PROTOTYPE:
…		…
1061		1522
1062	int	1523	int
1063	poll_cb(...)	1524	poll_cb(...)
1064	PROTOTYPE:	1525	PROTOTYPE:
1065	CODE:	1526	CODE:
1066	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);
1067	OUTPUT:	1536	OUTPUT:
1068	RETVAL	1537	RETVAL
1069		1538
1070	void	1539	void
1071	poll_wait()	1540	poll_wait()
…		…
1080	CODE:	1549	CODE:
1081	RETVAL = nreqs;	1550	RETVAL = nreqs;
1082	OUTPUT:	1551	OUTPUT:
1083	RETVAL	1552	RETVAL
1084		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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