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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.39 by root, Mon Feb 6 23:54:12 2006 UTC vs.
Revision 1.82 by root, Fri Oct 27 20:11:58 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>
…		…
36	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
37	#ifndef NAME_MAX	49	#ifndef NAME_MAX
38	# define NAME_MAX 4096	50	# define NAME_MAX 4096
39	#endif	51	#endif
40		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
41	#if __ia64	58	#if __ia64
42	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
43	#else	62	#else
44	# 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
45	#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;
46		88
47	enum {	89	enum {
48	REQ_QUIT,	90	REQ_QUIT,
49	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
50	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
51	REQ_SENDFILE,	93	REQ_SENDFILE,
52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
53	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
54	REQ_UNLINK, REQ_RMDIR,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
55	REQ_READDIR,	97	REQ_MKNOD, REQ_READDIR,
56	REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
		99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
57	};	101	};
58		102
		103	#define AIO_REQ_KLASS "IO::AIO::REQ"
		104	#define AIO_GRP_KLASS "IO::AIO::GRP"
		105
59	typedef struct aio_cb {	106	typedef struct aio_cb
		107	{
60	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
61		109
62	int type;	110	SV *data, *callback;
63		111	SV *fh, *fh2;
64	/* should receive a cleanup, with unions */	112	void *dataptr, *data2ptr;
65	int fd, fd2;	113	Stat_t *statdata;
66	off_t offset;	114	off_t offset;
67	size_t length;	115	size_t length;
68	ssize_t result;	116	ssize_t result;
		117
		118	STRLEN dataoffset;
		119	int type;
		120	int fd, fd2;
		121	int errorno;
69	mode_t mode; /* open */	122	mode_t mode; /* open */
70	int errorno;
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	STRLEN dataoffset;
75		123
76	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;
77	} aio_cb;	129	} aio_cb;
78		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
		134
79	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
		136	typedef aio_cb *aio_req_ornot;
80		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
81	static int started, wanted;	149	static unsigned int started, wanted;
82	static volatile int nreqs;	150
83	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;
84	static int respipe [2];	202	static int respipe [2];
85		203
86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
89		207
90	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
91	static volatile aio_req ress, rese; /* queue start, queue end */
92		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
93	static void free_req (aio_req req)	479	static void req_free (aio_req req)
94	{	480	{
95	if (req->data)	481	if (req->self)
		482	{
		483	sv_unmagic (req->self, PERL_MAGIC_ext);
		484	SvREFCNT_dec (req->self);
		485	}
		486
96	SvREFCNT_dec (req->data);	487	SvREFCNT_dec (req->data);
97
98	if (req->fh)
99	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
100
101	if (req->fh2)
102	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
103
104	if (req->statdata)
105	Safefree (req->statdata);
106
107	if (req->callback)
108	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
		491	Safefree (req->statdata);
109		492
110	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
111	free (req->data2ptr);	494	free (req->data2ptr);
112		495
113	Safefree (req);	496	Safefree (req);
114	}	497	}
115		498
116	static void	499	static void req_cancel_subs (aio_req grp)
117	poll_wait ()
118	{	500	{
119	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;
120	{	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	{
121	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
122	FD_ZERO(&rfd);	653	FD_ZERO(&rfd);
123	FD_SET(respipe [0], &rfd);	654	FD_SET(respipe [0], &rfd);
124		655
125	select (respipe [0] + 1, &rfd, 0, 0, 0);	656	select (respipe [0] + 1, &rfd, 0, 0, 0);
126	}	657	}
127	}	658	}
128		659
129	static int	660	static int poll_cb (int max)
130	poll_cb ()
131	{	661	{
132	dSP;	662	dSP;
133	int count = 0;	663	int count = 0;
134	int do_croak = 0;	664	int do_croak = 0;
135	aio_req req;	665	aio_req req;
136		666
137	for (;;)	667	for (;;)
138	{	668	{
139	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
140	req = ress;
141
142	if (req)
143	{	670	{
144	ress = req->next;	671	maybe_start_thread ();
145		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
146	if (!ress)	676	if (req)
147	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
148	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
149	char buf [32];	683	char buf [32];
150	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
151	;	686	}
152
153	rese = 0;
154	}	687	}
155	}
156		688
157	pthread_mutex_unlock (&reslock);	689	UNLOCK (reslock);
158		690
159	if (!req)	691	if (!req)
160	break;	692	break;
161		693
162	nreqs--;	694	--nreqs;
163		695
164	if (req->type == REQ_QUIT)
165	started--;
166	else
167	{
168	int errorno = errno;
169	errno = req->errorno;
170
171	if (req->type == REQ_READ)	696	if (req->type == REQ_GROUP && req->length)
172	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
173
174	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
175	SvREADONLY_off (req->data);
176
177	if (req->statdata)
178	{	697	{
179	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	698	req->fd = 1; /* mark request as delayed */
180	PL_laststatval = req->result;	699	continue;
181	PL_statcache = *(req->statdata);
182	}
183
184	ENTER;
185	PUSHMARK (SP);
186
187	if (req->type == REQ_READDIR)
188	{
189	SV *rv = &PL_sv_undef;
190
191	if (req->result >= 0)
192	{
193	char *buf = req->data2ptr;
194	AV *av = newAV ();
195
196	while (req->result)
197	{
198	SV *sv = newSVpv (buf, 0);
199
200	av_push (av, sv);
201	buf += SvCUR (sv) + 1;
202	req->result--;
203	}
204
205	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}
207
208	XPUSHs (rv);
209	}	700	}
210	else	701	else
211	{	702	{
212	XPUSHs (sv_2mortal (newSViv (req->result)));
213
214	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)
215	{	710	{
216	/* convert fd to fh */	711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
217	SV *fh;	712	PL_laststatval = req->result;
218		713	PL_statcache = *(req->statdata);
219	PUTBACK;
220	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221	SPAGAIN;
222
223	fh = SvREFCNT_inc (POPs);
224
225	PUSHMARK (SP);
226	XPUSHs (sv_2mortal (fh));
227	}	714	}
		715
		716	req_invoke (req);
		717
		718	count++;
228	}	719	}
229		720
230	if (SvOK (req->callback))	721	req_free (req);
231	{
232	PUTBACK;
233	call_sv (req->callback, G_VOID | G_EVAL);
234	SPAGAIN;
235
236	if (SvTRUE (ERRSV))
237	{
238	free_req (req);
239	croak (0);
240	}
241	}
242
243	LEAVE;
244
245	errno = errorno;
246	count++;
247	}	722	}
248		723
249	free_req (req);	724	if (nreqs <= max_outstanding)
		725	break;
		726
		727	poll_wait ();
		728
		729	max = 0;
250	}	730	}
251		731
252	return count;	732	return count;
253	}
254
255	static void *aio_proc(void *arg);
256
257	static void
258	start_thread (void)
259	{
260	sigset_t fullsigset, oldsigset;
261	pthread_t tid;
262	pthread_attr_t attr;
263
264	pthread_attr_init (&attr);
265	pthread_attr_setstacksize (&attr, STACKSIZE);
266	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
267
268	sigfillset (&fullsigset);
269	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
270
271	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
272	started++;
273
274	sigprocmask (SIG_SETMASK, &oldsigset, 0);
275	}
276
277	static void
278	send_req (aio_req req)
279	{
280	while (started < wanted && nreqs >= started)
281	start_thread ();
282
283	nreqs++;
284
285	pthread_mutex_lock (&reqlock);
286
287	req->next = 0;
288
289	if (reqe)
290	{
291	reqe->next = req;
292	reqe = req;
293	}
294	else
295	reqe = reqs = req;
296
297	pthread_cond_signal (&reqwait);
298	pthread_mutex_unlock (&reqlock);
299
300	if (nreqs > max_outstanding)
301	for (;;)
302	{
303	poll_cb ();
304
305	if (nreqs <= max_outstanding)
306	break;
307
308	poll_wait ();
309	}
310	}
311
312	static void
313	end_thread (void)
314	{
315	aio_req req;
316	Newz (0, req, 1, aio_cb);
317	req->type = REQ_QUIT;
318
319	send_req (req);
320	}
321
322	static void min_parallel (int nthreads)
323	{
324	if (wanted < nthreads)
325	wanted = nthreads;
326	}
327
328	static void max_parallel (int nthreads)
329	{
330	int cur = started;
331
332	if (wanted > nthreads)
333	wanted = nthreads;
334
335	while (cur > wanted)
336	{
337	end_thread ();
338	cur--;
339	}
340
341	while (started > wanted)
342	{
343	poll_wait ();
344	poll_cb ();
345	}
346	}	733	}
347		734
348	static void create_pipe ()	735	static void create_pipe ()
349	{	736	{
350	if (pipe (respipe))	737	if (pipe (respipe))
…		…
369	* 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,
370	* but that's your problem, not mine.	757	* but that's your problem, not mine.
371	*/	758	*/
372	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
373		760
374	static ssize_t	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
375	pread (int fd, void *buf, size_t count, off_t offset)
376	{	762	{
377	ssize_t res;	763	ssize_t res;
378	off_t ooffset;	764	off_t ooffset;
379		765
380	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
381	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
382	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
383	res = read (fd, buf, count);	769	res = read (fd, buf, count);
384	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
385	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
386		772
387	return res;	773	return res;
388	}	774	}
389		775
390	static ssize_t
391	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)
392	{	777	{
393	ssize_t res;	778	ssize_t res;
394	off_t ooffset;	779	off_t ooffset;
395		780
396	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
397	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
398	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
399	res = write (fd, buf, count);	784	res = write (fd, buf, count);
400	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
401	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
402		787
403	return res;	788	return res;
404	}	789	}
405	#endif	790	#endif
406		791
407	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
408	# define fdatasync fsync	793	# define fdatasync fsync
409	#endif	794	#endif
410		795
411	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
412	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
413		798
414	static ssize_t	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
415	readahead (int fd, off_t offset, size_t count)
416	{	800	{
417	char readahead_buf[4096];	801	dBUF;
418		802
419	while (count > 0)	803	while (count > 0)
420	{	804	{
421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
422		806
423	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
424	offset += len;	808	offset += len;
425	count -= len;	809	count -= len;
426	}	810	}
427		811
428	errno = 0;	812	errno = 0;
429	}	813	}
		814
430	#endif	815	#endif
431		816
432	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
433	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
434		819
435	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
436		821
437	static int
438	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
439	{	823	{
440	struct dirent *e;	824	struct dirent *e;
441	int errorno;	825	int errorno;
442		826
443	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
444		828
445	e = readdir (dirp);	829	e = readdir (dirp);
446	errorno = errno;	830	errorno = errno;
447		831
448	if (e)	832	if (e)
…		…
451	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
452	}	836	}
453	else	837	else
454	*res = 0;	838	*res = 0;
455		839
456	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
457		841
458	errno = errorno;	842	errno = errorno;
459	return e ? 0 : -1;	843	return e ? 0 : -1;
460	}	844	}
461	#endif	845	#endif
462		846
463	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
464	static ssize_t
465	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)
466	{	849	{
467	ssize_t res;	850	ssize_t res;
468		851
469	if (!count)	852	if (!count)
470	return 0;	853	return 0;
…		…
481	{	864	{
482	off_t sbytes;	865	off_t sbytes;
483	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
484		867
485	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
486	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
487	res = sbytes;	870	res = sbytes;
488	}	871	}
489		872
490	# elif __hpux	873	# elif __hpux
491	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
519	#endif	902	#endif
520	)	903	)
521	)	904	)
522	{	905	{
523	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
524	char buf[4096];	907	dBUF;
		908
525	res = 0;	909	res = 0;
526		910
527	while (count)	911	while (count)
528	{	912	{
529	ssize_t cnt;	913	ssize_t cnt;
530		914
531	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
532		916
533	if (cnt <= 0)	917	if (cnt <= 0)
534	{	918	{
535	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
536	break;	920	break;
537	}	921	}
538		922
539	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
540		924
541	if (cnt <= 0)	925	if (cnt <= 0)
542	{	926	{
543	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
544	break;	928	break;
…		…
552		936
553	return res;	937	return res;
554	}	938	}
555		939
556	/* read a full directory */	940	/* read a full directory */
557	static int	941	static void scandir_ (aio_req req, worker *self)
558	scandir_ (const char *path, void **namesp)
559	{	942	{
560	DIR *dirp = opendir (path);	943	DIR *dirp;
561	union	944	union
562	{	945	{
563	struct dirent d;	946	struct dirent d;
564	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
565	} u;	948	} *u;
566	struct dirent *entp;	949	struct dirent *entp;
567	char *name, *names;	950	char *name, *names;
568	int memlen = 4096;	951	int memlen = 4096;
569	int memofs = 0;	952	int memofs = 0;
570	int res = 0;	953	int res = 0;
571	int errorno;	954	int errorno;
572		955
573	if (!dirp)	956	LOCK (wrklock);
574	return -1;	957	self->dirp = dirp = opendir (req->dataptr);
575		958	self->dbuf = u = malloc (sizeof (*u));
576	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;
577		1007
578	for (;;)	1008	for (;;)
579	{	1009	{
580	errno = 0, readdir_r (dirp, &u.d, &entp);	1010	LOCK (reqlock);
581
582	if (!entp)
583	break;
584
585	name = entp->d_name;
586
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{
589	int len = strlen (name) + 1;
590
591	res++;
592
593	while (memofs + len > memlen)
594	{
595	memlen *= 2;
596	names = realloc (names, memlen);
597	if (!names)
598	break;
599	}
600
601	memcpy (names + memofs, name, len);
602	memofs += len;
603	}
604	}
605
606	errorno = errno;
607	closedir (dirp);
608
609	if (errorno)
610	{
611	free (names);
612	errno = errorno;
613	res = -1;
614	}
615
616	*namesp = (void *)names;
617	return res;
618	}
619
620	/*****************************************************************************/
621
622	static void *
623	aio_proc (void *thr_arg)
624	{
625	aio_req req;
626	int type;
627
628	do
629	{
630	pthread_mutex_lock (&reqlock);
631		1011
632	for (;;)	1012	for (;;)
633	{	1013	{
634	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
635
636	if (reqs)
637	{
638	reqs = reqs->next;
639	if (!reqs) reqe = 0;
640	}
641		1015
642	if (req)	1016	if (req)
643	break;	1017	break;
644		1018
645	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
646	}	1020	}
647		1021
648	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
649		1025
650	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
651		1027
652	type = req->type;	1028	if (!(req->flags & FLAG_CANCELLED))
653
654	switch (type)	1029	switch (req->type)
655	{	1030	{
656	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;
657	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;
658		1033
659	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;
660	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;
661		1036
662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
665		1040
666	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;
667	case REQ_CLOSE: req->result = close (req->fd); break;	1042	case REQ_CLOSE: req->result = close (req->fd); break;
668	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
669	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;
670	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1048	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
671		1049
672	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
673	case REQ_FSYNC: req->result = fsync (req->fd); break;	1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
674	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1052	case REQ_READDIR: scandir_ (req, self); break;
675		1053
		1054	case REQ_BUSY:
		1055	{
		1056	struct timeval tv;
		1057
		1058	tv.tv_sec = req->fd;
		1059	tv.tv_usec = req->fd2;
		1060
		1061	req->result = select (0, 0, 0, 0, &tv);
		1062	}
		1063
		1064	case REQ_GROUP:
		1065	case REQ_NOP:
		1066	break;
		1067
676	case REQ_QUIT:	1068	case REQ_QUIT:
677	break;	1069	LOCK (wrklock);
		1070	worker_free (self);
		1071	--started;
		1072	UNLOCK (wrklock);
		1073	return 0;
678		1074
679	default:	1075	default:
680	req->result = ENOSYS;	1076	req->result = ENOSYS;
681	break;	1077	break;
682	}	1078	}
683		1079
684	req->errorno = errno;	1080	req->errorno = errno;
685		1081
686	pthread_mutex_lock (&reslock);	1082	LOCK (reslock);
687		1083
688	req->next = 0;	1084	++npending;
689		1085
690	if (rese)	1086	if (!reqq_push (&res_queue, req))
691	{
692	rese->next = req;
693	rese = req;
694	}
695	else
696	{
697	rese = ress = req;
698
699	/* write a dummy byte to the pipe so fh becomes ready */	1087	/* write a dummy byte to the pipe so fh becomes ready */
700	write (respipe [1], &respipe, 1);	1088	write (respipe [1], &respipe, 1);
701	}
702		1089
703	pthread_mutex_unlock (&reslock);	1090	self->req = 0;
704	}	1091	worker_clear (self);
705	while (type != REQ_QUIT);
706		1092
707	return 0;	1093	UNLOCK (reslock);
		1094	}
708	}	1095	}
709		1096
710	/*****************************************************************************/	1097	/*****************************************************************************/
711		1098
712	static void atfork_prepare (void)	1099	static void atfork_prepare (void)
713	{	1100	{
714	pthread_mutex_lock (&reqlock);	1101	LOCK (wrklock);
715	pthread_mutex_lock (&reslock);	1102	LOCK (reqlock);
		1103	LOCK (reslock);
716	#if !HAVE_PREADWRITE	1104	#if !HAVE_PREADWRITE
717	pthread_mutex_lock (&preadwritelock);	1105	LOCK (preadwritelock);
718	#endif	1106	#endif
719	#if !HAVE_READDIR_R	1107	#if !HAVE_READDIR_R
720	pthread_mutex_lock (&readdirlock);	1108	LOCK (readdirlock);
721	#endif	1109	#endif
722	}	1110	}
723		1111
724	static void atfork_parent (void)	1112	static void atfork_parent (void)
725	{	1113	{
726	#if !HAVE_READDIR_R	1114	#if !HAVE_READDIR_R
727	pthread_mutex_unlock (&readdirlock);	1115	UNLOCK (readdirlock);
728	#endif	1116	#endif
729	#if !HAVE_PREADWRITE	1117	#if !HAVE_PREADWRITE
730	pthread_mutex_unlock (&preadwritelock);	1118	UNLOCK (preadwritelock);
731	#endif	1119	#endif
732	pthread_mutex_unlock (&reslock);	1120	UNLOCK (reslock);
733	pthread_mutex_unlock (&reqlock);	1121	UNLOCK (reqlock);
		1122	UNLOCK (wrklock);
734	}	1123	}
735		1124
736	static void atfork_child (void)	1125	static void atfork_child (void)
737	{	1126	{
738	aio_req prv;	1127	aio_req prv;
739		1128
		1129	while (prv = reqq_shift (&req_queue))
		1130	req_free (prv);
		1131
		1132	while (prv = reqq_shift (&res_queue))
		1133	req_free (prv);
		1134
		1135	while (wrk_first.next != &wrk_first)
		1136	{
		1137	worker *wrk = wrk_first.next;
		1138
		1139	if (wrk->req)
		1140	req_free (wrk->req);
		1141
		1142	worker_clear (wrk);
		1143	worker_free (wrk);
		1144	}
		1145
740	started = 0;	1146	started = 0;
741		1147	nreqs = 0;
742	while (reqs)
743	{
744	prv = reqs;
745	reqs = prv->next;
746	free_req (prv);
747	}
748
749	reqs = reqe = 0;
750
751	while (ress)
752	{
753	prv = ress;
754	ress = prv->next;
755	free_req (prv);
756	}
757
758	ress = rese = 0;
759		1148
760	close (respipe [0]);	1149	close (respipe [0]);
761	close (respipe [1]);	1150	close (respipe [1]);
762	create_pipe ();	1151	create_pipe ();
763		1152
764	atfork_parent ();	1153	atfork_parent ();
765	}	1154	}
766		1155
767	#define dREQ \	1156	#define dREQ \
768	aio_req req; \	1157	aio_req req; \
		1158	int req_pri = next_pri; \
		1159	next_pri = DEFAULT_PRI + PRI_BIAS; \
769	\	1160	\
770	if (SvOK (callback) && !SvROK (callback)) \	1161	if (SvOK (callback) && !SvROK (callback)) \
771	croak ("clalback must be undef or of reference type"); \	1162	croak ("callback must be undef or of reference type"); \
772	\	1163	\
773	Newz (0, req, 1, aio_cb); \	1164	Newz (0, req, 1, aio_cb); \
774	if (!req) \	1165	if (!req) \
775	croak ("out of memory during aio_req allocation"); \	1166	croak ("out of memory during aio_req allocation"); \
776	\	1167	\
777	req->callback = newSVsv (callback);	1168	req->callback = newSVsv (callback); \
		1169	req->pri = req_pri
		1170
		1171	#define REQ_SEND \
		1172	req_send (req); \
		1173	\
		1174	if (GIMME_V != G_VOID) \
		1175	XPUSHs (req_sv (req, AIO_REQ_KLASS));
778		1176
779	MODULE = IO::AIO PACKAGE = IO::AIO	1177	MODULE = IO::AIO PACKAGE = IO::AIO
780		1178
781	PROTOTYPES: ENABLE	1179	PROTOTYPES: ENABLE
782		1180
783	BOOT:	1181	BOOT:
784	{	1182	{
		1183	HV *stash = gv_stashpv ("IO::AIO", 1);
		1184
		1185	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1186	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1187	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1188	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1189	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1190	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1191
785	create_pipe ();	1192	create_pipe ();
786	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1193	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
787	}
788		1194
		1195	start_thread ();
		1196	}
		1197
789	void	1198	void
790	min_parallel(nthreads)	1199	min_parallel (int nthreads)
791	int nthreads
792	PROTOTYPE: $	1200	PROTOTYPE: $
793		1201
794	void	1202	void
795	max_parallel(nthreads)	1203	max_parallel (int nthreads)
796	int nthreads
797	PROTOTYPE: $	1204	PROTOTYPE: $
798		1205
799	int	1206	int
800	max_outstanding(nreqs)	1207	max_outstanding (int maxreqs)
801	int nreqs	1208	PROTOTYPE: $
802	PROTOTYPE: $
803	CODE:	1209	CODE:
804	RETVAL = max_outstanding;	1210	RETVAL = max_outstanding;
805	max_outstanding = nreqs;	1211	max_outstanding = maxreqs;
		1212	OUTPUT:
		1213	RETVAL
806		1214
807	void	1215	void
808	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1216	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
809	SV * pathname	1217	SV * pathname
810	int flags	1218	int flags
811	int mode	1219	int mode
812	SV * callback	1220	SV * callback
813	PROTOTYPE: $$$;$	1221	PROTOTYPE: $$$;$
814	CODE:	1222	PPCODE:
815	{	1223	{
816	dREQ;	1224	dREQ;
817		1225
818	req->type = REQ_OPEN;	1226	req->type = REQ_OPEN;
819	req->data = newSVsv (pathname);	1227	req->data = newSVsv (pathname);
820	req->dataptr = SvPVbyte_nolen (req->data);	1228	req->dataptr = SvPVbyte_nolen (req->data);
821	req->fd = flags;	1229	req->fd = flags;
822	req->mode = mode;	1230	req->mode = mode;
823		1231
824	send_req (req);	1232	REQ_SEND;
825	}	1233	}
826		1234
827	void	1235	void
828	aio_close(fh,callback=&PL_sv_undef)	1236	aio_close (fh,callback=&PL_sv_undef)
829	SV * fh	1237	SV * fh
830	SV * callback	1238	SV * callback
831	PROTOTYPE: $;$	1239	PROTOTYPE: $;$
832	ALIAS:	1240	ALIAS:
833	aio_close = REQ_CLOSE	1241	aio_close = REQ_CLOSE
834	aio_fsync = REQ_FSYNC	1242	aio_fsync = REQ_FSYNC
835	aio_fdatasync = REQ_FDATASYNC	1243	aio_fdatasync = REQ_FDATASYNC
836	CODE:	1244	PPCODE:
837	{	1245	{
838	dREQ;	1246	dREQ;
839		1247
840	req->type = ix;	1248	req->type = ix;
841	req->fh = newSVsv (fh);	1249	req->fh = newSVsv (fh);
842	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
843		1251
844	send_req (req);	1252	REQ_SEND (req);
845	}	1253	}
846		1254
847	void	1255	void
848	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1256	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
849	SV * fh	1257	SV * fh
850	UV offset	1258	UV offset
851	UV length	1259	UV length
852	SV * data	1260	SV * data
853	UV dataoffset	1261	UV dataoffset
854	SV * callback	1262	SV * callback
855	ALIAS:	1263	ALIAS:
856	aio_read = REQ_READ	1264	aio_read = REQ_READ
857	aio_write = REQ_WRITE	1265	aio_write = REQ_WRITE
858	PROTOTYPE: $$$$$;$	1266	PROTOTYPE: $$$$$;$
859	CODE:	1267	PPCODE:
860	{	1268	{
861	aio_req req;	1269	aio_req req;
862	STRLEN svlen;	1270	STRLEN svlen;
863	char *svptr = SvPVbyte (data, svlen);	1271	char *svptr = SvPVbyte (data, svlen);
864		1272
…		…
902	{	1310	{
903	SvREADONLY_on (data);	1311	SvREADONLY_on (data);
904	req->data2ptr = (void *)data;	1312	req->data2ptr = (void *)data;
905	}	1313	}
906		1314
907	send_req (req);	1315	REQ_SEND;
908	}	1316	}
909	}	1317	}
910		1318
911	void	1319	void
912	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1320	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
913	SV * out_fh	1321	SV * out_fh
914	SV * in_fh	1322	SV * in_fh
915	UV in_offset	1323	UV in_offset
916	UV length	1324	UV length
917	SV * callback	1325	SV * callback
918	PROTOTYPE: $$$$;$	1326	PROTOTYPE: $$$$;$
919	CODE:	1327	PPCODE:
920	{	1328	{
921	dREQ;	1329	dREQ;
922		1330
923	req->type = REQ_SENDFILE;	1331	req->type = REQ_SENDFILE;
924	req->fh = newSVsv (out_fh);	1332	req->fh = newSVsv (out_fh);
…		…
926	req->fh2 = newSVsv (in_fh);	1334	req->fh2 = newSVsv (in_fh);
927	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1335	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
928	req->offset = in_offset;	1336	req->offset = in_offset;
929	req->length = length;	1337	req->length = length;
930		1338
931	send_req (req);	1339	REQ_SEND;
932	}	1340	}
933		1341
934	void	1342	void
935	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1343	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
936	SV * fh	1344	SV * fh
937	UV offset	1345	UV offset
938	IV length	1346	IV length
939	SV * callback	1347	SV * callback
940	PROTOTYPE: $$$;$	1348	PROTOTYPE: $$$;$
941	CODE:	1349	PPCODE:
942	{	1350	{
943	dREQ;	1351	dREQ;
944		1352
945	req->type = REQ_READAHEAD;	1353	req->type = REQ_READAHEAD;
946	req->fh = newSVsv (fh);	1354	req->fh = newSVsv (fh);
947	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1355	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
948	req->offset = offset;	1356	req->offset = offset;
949	req->length = length;	1357	req->length = length;
950		1358
951	send_req (req);	1359	REQ_SEND;
952	}	1360	}
953		1361
954	void	1362	void
955	aio_stat(fh_or_path,callback=&PL_sv_undef)	1363	aio_stat (fh_or_path,callback=&PL_sv_undef)
956	SV * fh_or_path	1364	SV * fh_or_path
957	SV * callback	1365	SV * callback
958	ALIAS:	1366	ALIAS:
959	aio_stat = REQ_STAT	1367	aio_stat = REQ_STAT
960	aio_lstat = REQ_LSTAT	1368	aio_lstat = REQ_LSTAT
961	CODE:	1369	PPCODE:
962	{	1370	{
963	dREQ;	1371	dREQ;
964		1372
965	New (0, req->statdata, 1, Stat_t);	1373	New (0, req->statdata, 1, Stat_t);
966	if (!req->statdata)	1374	if (!req->statdata)
967	{	1375	{
968	free_req (req);	1376	req_free (req);
969	croak ("out of memory during aio_req->statdata allocation");	1377	croak ("out of memory during aio_req->statdata allocation");
970	}	1378	}
971		1379
972	if (SvPOK (fh_or_path))	1380	if (SvPOK (fh_or_path))
973	{	1381	{
…		…
980	req->type = REQ_FSTAT;	1388	req->type = REQ_FSTAT;
981	req->fh = newSVsv (fh_or_path);	1389	req->fh = newSVsv (fh_or_path);
982	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1390	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
983	}	1391	}
984		1392
985	send_req (req);	1393	REQ_SEND;
986	}	1394	}
987		1395
988	void	1396	void
989	aio_unlink(pathname,callback=&PL_sv_undef)	1397	aio_unlink (pathname,callback=&PL_sv_undef)
990	SV * pathname	1398	SV * pathname
991	SV * callback	1399	SV * callback
992	ALIAS:	1400	ALIAS:
993	aio_unlink = REQ_UNLINK	1401	aio_unlink = REQ_UNLINK
994	aio_rmdir = REQ_RMDIR	1402	aio_rmdir = REQ_RMDIR
		1403	aio_readdir = REQ_READDIR
995	CODE:	1404	PPCODE:
996	{	1405	{
997	dREQ;	1406	dREQ;
998		1407
999	req->type = ix;	1408	req->type = ix;
1000	req->data = newSVsv (pathname);	1409	req->data = newSVsv (pathname);
1001	req->dataptr = SvPVbyte_nolen (req->data);	1410	req->dataptr = SvPVbyte_nolen (req->data);
1002		1411
1003	send_req (req);	1412	REQ_SEND;
1004	}	1413	}
1005		1414
1006	void	1415	void
1007	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1416	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1008	SV * oldpath	1417	SV * oldpath
1009	SV * newpath	1418	SV * newpath
1010	SV * callback	1419	SV * callback
		1420	ALIAS:
		1421	aio_link = REQ_LINK
		1422	aio_symlink = REQ_SYMLINK
		1423	aio_rename = REQ_RENAME
1011	CODE:	1424	PPCODE:
1012	{	1425	{
1013	dREQ;	1426	dREQ;
1014		1427
1015	req->type = REQ_SYMLINK;	1428	req->type = ix;
1016	req->fh = newSVsv (oldpath);	1429	req->fh = newSVsv (oldpath);
1017	req->data2ptr = SvPVbyte_nolen (req->fh);	1430	req->data2ptr = SvPVbyte_nolen (req->fh);
1018	req->data = newSVsv (newpath);	1431	req->data = newSVsv (newpath);
1019	req->dataptr = SvPVbyte_nolen (req->data);	1432	req->dataptr = SvPVbyte_nolen (req->data);
1020		1433
1021	send_req (req);	1434	REQ_SEND;
1022	}	1435	}
1023		1436
1024	void	1437	void
1025	aio_readdir(pathname,callback=&PL_sv_undef)	1438	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1026	SV * pathname	1439	SV * pathname
1027	SV * callback	1440	SV * callback
		1441	UV mode
		1442	UV dev
1028	CODE:	1443	PPCODE:
1029	{	1444	{
1030	dREQ;	1445	dREQ;
1031		1446
1032	req->type = REQ_READDIR;	1447	req->type = REQ_MKNOD;
1033	req->data = newSVsv (pathname);	1448	req->data = newSVsv (pathname);
1034	req->dataptr = SvPVbyte_nolen (req->data);	1449	req->dataptr = SvPVbyte_nolen (req->data);
		1450	req->mode = (mode_t)mode;
		1451	req->offset = dev;
1035		1452
1036	send_req (req);	1453	REQ_SEND;
1037	}	1454	}
1038		1455
1039	void	1456	void
		1457	aio_busy (delay,callback=&PL_sv_undef)
		1458	double delay
		1459	SV * callback
		1460	PPCODE:
		1461	{
		1462	dREQ;
		1463
		1464	req->type = REQ_BUSY;
		1465	req->fd = delay < 0. ? 0 : delay;
		1466	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1467
		1468	REQ_SEND;
		1469	}
		1470
		1471	void
		1472	aio_group (callback=&PL_sv_undef)
		1473	SV * callback
		1474	PROTOTYPE: ;$
		1475	PPCODE:
		1476	{
		1477	dREQ;
		1478
		1479	req->type = REQ_GROUP;
		1480	req_send (req);
		1481
		1482	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1483	}
		1484
		1485	void
		1486	aio_nop (callback=&PL_sv_undef)
		1487	SV * callback
		1488	PPCODE:
		1489	{
		1490	dREQ;
		1491
		1492	req->type = REQ_NOP;
		1493
		1494	REQ_SEND;
		1495	}
		1496
		1497	int
		1498	aioreq_pri (int pri = 0)
		1499	PROTOTYPE: ;$
		1500	CODE:
		1501	RETVAL = next_pri - PRI_BIAS;
		1502	if (items > 0)
		1503	{
		1504	if (pri < PRI_MIN) pri = PRI_MIN;
		1505	if (pri > PRI_MAX) pri = PRI_MAX;
		1506	next_pri = pri + PRI_BIAS;
		1507	}
		1508	OUTPUT:
		1509	RETVAL
		1510
		1511	void
		1512	aioreq_nice (int nice = 0)
		1513	CODE:
		1514	nice = next_pri - nice;
		1515	if (nice < PRI_MIN) nice = PRI_MIN;
		1516	if (nice > PRI_MAX) nice = PRI_MAX;
		1517	next_pri = nice + PRI_BIAS;
		1518
		1519	void
1040	flush()	1520	flush ()
1041	PROTOTYPE:	1521	PROTOTYPE:
1042	CODE:	1522	CODE:
1043	while (nreqs)	1523	while (nreqs)
1044	{	1524	{
1045	poll_wait ();	1525	poll_wait ();
1046	poll_cb ();	1526	poll_cb (0);
1047	}	1527	}
1048		1528
1049	void	1529	void
1050	poll()	1530	poll()
1051	PROTOTYPE:	1531	PROTOTYPE:
1052	CODE:	1532	CODE:
1053	if (nreqs)	1533	if (nreqs)
1054	{	1534	{
1055	poll_wait ();	1535	poll_wait ();
1056	poll_cb ();	1536	poll_cb (0);
1057	}	1537	}
1058		1538
1059	int	1539	int
1060	poll_fileno()	1540	poll_fileno()
1061	PROTOTYPE:	1541	PROTOTYPE:
…		…
1066		1546
1067	int	1547	int
1068	poll_cb(...)	1548	poll_cb(...)
1069	PROTOTYPE:	1549	PROTOTYPE:
1070	CODE:	1550	CODE:
1071	RETVAL = poll_cb ();	1551	RETVAL = poll_cb (0);
		1552	OUTPUT:
		1553	RETVAL
		1554
		1555	int
		1556	poll_some(int max = 0)
		1557	PROTOTYPE: $
		1558	CODE:
		1559	RETVAL = poll_cb (max);
1072	OUTPUT:	1560	OUTPUT:
1073	RETVAL	1561	RETVAL
1074		1562
1075	void	1563	void
1076	poll_wait()	1564	poll_wait()
…		…
1085	CODE:	1573	CODE:
1086	RETVAL = nreqs;	1574	RETVAL = nreqs;
1087	OUTPUT:	1575	OUTPUT:
1088	RETVAL	1576	RETVAL
1089		1577
		1578	int
		1579	nready()
		1580	PROTOTYPE:
		1581	CODE:
		1582	RETVAL = get_nready ();
		1583	OUTPUT:
		1584	RETVAL
		1585
		1586	int
		1587	npending()
		1588	PROTOTYPE:
		1589	CODE:
		1590	RETVAL = get_npending ();
		1591	OUTPUT:
		1592	RETVAL
		1593
		1594	PROTOTYPES: DISABLE
		1595
		1596	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1597
		1598	void
		1599	cancel (aio_req_ornot req)
		1600	CODE:
		1601	req_cancel (req);
		1602
		1603	void
		1604	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1605	CODE:
		1606	SvREFCNT_dec (req->callback);
		1607	req->callback = newSVsv (callback);
		1608
		1609	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1610
		1611	void
		1612	add (aio_req grp, ...)
		1613	PPCODE:
		1614	{
		1615	int i;
		1616	aio_req req;
		1617
		1618	if (grp->fd == 2)
		1619	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1620
		1621	for (i = 1; i < items; ++i )
		1622	{
		1623	if (GIMME_V != G_VOID)
		1624	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1625
		1626	req = SvAIO_REQ (ST (i));
		1627
		1628	if (req)
		1629	{
		1630	++grp->length;
		1631	req->grp = grp;
		1632
		1633	req->grp_prev = 0;
		1634	req->grp_next = grp->grp_first;
		1635
		1636	if (grp->grp_first)
		1637	grp->grp_first->grp_prev = req;
		1638
		1639	grp->grp_first = req;
		1640	}
		1641	}
		1642	}
		1643
		1644	void
		1645	cancel_subs (aio_req_ornot req)
		1646	CODE:
		1647	req_cancel_subs (req);
		1648
		1649	void
		1650	result (aio_req grp, ...)
		1651	CODE:
		1652	{
		1653	int i;
		1654	AV *av;
		1655
		1656	grp->errorno = errno;
		1657
		1658	av = newAV ();
		1659
		1660	for (i = 1; i < items; ++i )
		1661	av_push (av, newSVsv (ST (i)));
		1662
		1663	SvREFCNT_dec (grp->data);
		1664	grp->data = (SV *)av;
		1665	}
		1666
		1667	void
		1668	errno (aio_req grp, int errorno = errno)
		1669	CODE:
		1670	grp->errorno = errorno;
		1671
		1672	void
		1673	limit (aio_req grp, int limit)
		1674	CODE:
		1675	grp->fd2 = limit;
		1676	aio_grp_feed (grp);
		1677
		1678	void
		1679	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1680	CODE:
		1681	{
		1682	SvREFCNT_dec (grp->fh2);
		1683	grp->fh2 = newSVsv (callback);
		1684
		1685	if (grp->fd2 <= 0)
		1686	grp->fd2 = 2;
		1687
		1688	aio_grp_feed (grp);
		1689	}
		1690

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