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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.32 by root, Mon Aug 22 23:20:37 2005 UTC vs.
Revision 1.81 by root, Fri Oct 27 20:10:06 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"
7		16
8	#include "autoconf/config.h"	17	#include "autoconf/config.h"
9		18
10	#include <pthread.h>	19	#include <pthread.h>
11		20
		21	#include <stddef.h>
		22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
12	#include <sys/types.h>	25	#include <sys/types.h>
13	#include <sys/stat.h>	26	#include <sys/stat.h>
14		27	#include <limits.h>
15	#include <unistd.h>	28	#include <unistd.h>
16	#include <fcntl.h>	29	#include <fcntl.h>
17	#include <signal.h>	30	#include <signal.h>
18	#include <sched.h>	31	#include <sched.h>
19		32
…		…
23	# elif __freebsd	36	# elif __freebsd
24	# include <sys/socket.h>	37	# include <sys/socket.h>
25	# include <sys/uio.h>	38	# include <sys/uio.h>
26	# elif __hpux	39	# elif __hpux
27	# include <sys/socket.h>	40	# include <sys/socket.h>
		41	# elif __solaris /* not yet */
		42	# include <sys/sendfile.h>
		43	# else
		44	# error sendfile support requested but not available
28	# endif	45	# endif
		46	#endif
		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
29	#endif	56	#endif
30		57
31	#if __ia64	58	#if __ia64
32	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
33	#else	62	#else
34	# define STACKSIZE 4096	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
35	#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;
36		88
37	enum {	89	enum {
38	REQ_QUIT,	90	REQ_QUIT,
39	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
40	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
41	REQ_SENDFILE,	93	REQ_SENDFILE,
42	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
43	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
44	REQ_UNLINK, REQ_RMDIR,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
45	REQ_SYMLINK,	97	REQ_MKNOD, REQ_READDIR,
		98	REQ_LINK, REQ_SYMLINK,
		99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
46	};	101	};
47		102
		103	#define AIO_REQ_KLASS "IO::AIO::REQ"
		104	#define AIO_GRP_KLASS "IO::AIO::GRP"
		105
48	typedef struct aio_cb {	106	typedef struct aio_cb
		107	{
49	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
50		109
51	int type;	110	SV *data, *callback;
52		111	SV *fh, *fh2;
53	int fd, fd2;	112	void *dataptr, *data2ptr;
		113	Stat_t *statdata;
54	off_t offset;	114	off_t offset;
55	size_t length;	115	size_t length;
56	ssize_t result;	116	ssize_t result;
		117
		118	STRLEN dataoffset;
		119	int type;
		120	int fd, fd2;
		121	int errorno;
57	mode_t mode; /* open */	122	mode_t mode; /* open */
58	int errorno;
59	SV *data, *callback;
60	SV *fh, *fh2;
61	void *dataptr, *data2ptr;
62	STRLEN dataoffset;
63		123
64	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;
65	} aio_cb;	129	} aio_cb;
66		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
		134
67	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
		136	typedef aio_cb *aio_req_ornot;
68		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
69	static int started, wanted;	149	static unsigned int started, wanted;
70	static volatile int nreqs;	150
71	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;
72	static int respipe [2];	202	static int respipe [2];
73		203
74	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
75	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
76	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
77		207
78	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
79	static volatile aio_req ress, rese; /* queue start, queue end */
80		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
81	static void free_req (aio_req req)	479	static void req_free (aio_req req)
82	{	480	{
83	if (req->data)	481	if (req->self)
		482	{
		483	sv_unmagic (req->self, PERL_MAGIC_ext);
		484	SvREFCNT_dec (req->self);
		485	}
		486
84	SvREFCNT_dec (req->data);	487	SvREFCNT_dec (req->data);
85
86	if (req->fh)
87	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
88
89	if (req->fh2)
90	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
91
92	if (req->statdata)
93	Safefree (req->statdata);
94
95	if (req->callback)
96	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
		491	Safefree (req->statdata);
		492
		493	if (req->type == REQ_READDIR)
		494	free (req->data2ptr);
97		495
98	Safefree (req);	496	Safefree (req);
99	}	497	}
100		498
101	static void	499	static void req_cancel_subs (aio_req grp)
102	poll_wait ()
103	{	500	{
104	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;
105	{	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	{
106	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
107	FD_ZERO(&rfd);	653	FD_ZERO(&rfd);
108	FD_SET(respipe [0], &rfd);	654	FD_SET(respipe [0], &rfd);
109		655
110	select (respipe [0] + 1, &rfd, 0, 0, 0);	656	select (respipe [0] + 1, &rfd, 0, 0, 0);
111	}	657	}
112	}	658	}
113		659
114	static int	660	static int poll_cb (int max)
115	poll_cb ()
116	{	661	{
117	dSP;	662	dSP;
118	int count = 0;	663	int count = 0;
119	int do_croak = 0;	664	int do_croak = 0;
120	aio_req req;	665	aio_req req;
121		666
122	for (;;)	667	for (;;)
123	{	668	{
124	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
125	req = ress;
126
127	if (req)
128	{	670	{
129	ress = req->next;	671	maybe_start_thread ();
130		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
131	if (!ress)	676	if (req)
132	{	677	{
133	/* read any signals sent by the worker threads */	678	--npending;
134	char buf [32];
135	while (read (respipe [0], buf, 32) == 32)
136	;
137		679
138	rese = 0;	680	if (!res_queue.size)
139	}
140	}
141
142	pthread_mutex_unlock (&reslock);
143
144	if (!req)
145	break;
146
147	nreqs--;
148
149	if (req->type == REQ_QUIT)
150	started--;
151	else
152	{
153	int errorno = errno;
154	errno = req->errorno;
155
156	if (req->type == REQ_READ)
157	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
158
159	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
160	SvREADONLY_off (req->data);
161
162	if (req->statdata)
163	{
164	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
165	PL_laststatval = req->result;
166	PL_statcache = *(req->statdata);
167	}
168
169	ENTER;
170	PUSHMARK (SP);
171	XPUSHs (sv_2mortal (newSViv (req->result)));
172
173	if (req->type == REQ_OPEN)
174	{
175	/* convert fd to fh */
176	SV *fh;
177
178	PUTBACK;
179	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
180	SPAGAIN;
181
182	fh = SvREFCNT_inc (POPs);
183
184	PUSHMARK (SP);
185	XPUSHs (sv_2mortal (fh));
186	}
187
188	if (SvOK (req->callback))
189	{
190	PUTBACK;
191	call_sv (req->callback, G_VOID | G_EVAL);
192	SPAGAIN;
193
194	if (SvTRUE (ERRSV))
195	{	681	{
196	free_req (req);	682	/* read any signals sent by the worker threads */
		683	char buf [32];
		684	while (read (respipe [0], buf, 32) == 32)
197	croak (0);	685	;
198	}	686	}
199	}	687	}
200		688
201	LEAVE;	689	UNLOCK (reslock);
202		690
203	errno = errorno;	691	if (!req)
		692	break;
		693
		694	--nreqs;
		695
		696	if (req->type == REQ_GROUP && req->length)
		697	{
		698	req->fd = 1; /* mark request as delayed */
		699	continue;
		700	}
		701	else
		702	{
		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)
		710	{
		711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		712	PL_laststatval = req->result;
		713	PL_statcache = *(req->statdata);
		714	}
		715
		716	req_invoke (req);
		717
204	count++;	718	count++;
		719	}
		720
		721	req_free (req);
205	}	722	}
206		723
207	free_req (req);	724	if (nreqs <= max_outstanding)
		725	break;
		726
		727	poll_wait ();
		728
		729	max = 0;
208	}	730	}
209		731
210	return count;	732	return count;
211	}
212
213	static void *aio_proc(void *arg);
214
215	static void
216	start_thread (void)
217	{
218	sigset_t fullsigset, oldsigset;
219	pthread_t tid;
220	pthread_attr_t attr;
221
222	pthread_attr_init (&attr);
223	pthread_attr_setstacksize (&attr, STACKSIZE);
224	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
225
226	sigfillset (&fullsigset);
227	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
228
229	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
230	started++;
231
232	sigprocmask (SIG_SETMASK, &oldsigset, 0);
233	}
234
235	static void
236	send_req (aio_req req)
237	{
238	while (started < wanted && nreqs >= started)
239	start_thread ();
240
241	nreqs++;
242
243	pthread_mutex_lock (&reqlock);
244
245	req->next = 0;
246
247	if (reqe)
248	{
249	reqe->next = req;
250	reqe = req;
251	}
252	else
253	reqe = reqs = req;
254
255	pthread_cond_signal (&reqwait);
256	pthread_mutex_unlock (&reqlock);
257
258	if (nreqs > max_outstanding)
259	for (;;)
260	{
261	poll_cb ();
262
263	if (nreqs <= max_outstanding)
264	break;
265
266	poll_wait ();
267	}
268	}
269
270	static void
271	end_thread (void)
272	{
273	aio_req req;
274	Newz (0, req, 1, aio_cb);
275	req->type = REQ_QUIT;
276
277	send_req (req);
278	}
279
280	static void min_parallel (int nthreads)
281	{
282	if (wanted < nthreads)
283	wanted = nthreads;
284	}
285
286	static void max_parallel (int nthreads)
287	{
288	int cur = started;
289
290	if (wanted > nthreads)
291	wanted = nthreads;
292
293	while (cur > wanted)
294	{
295	end_thread ();
296	cur--;
297	}
298
299	while (started > wanted)
300	{
301	poll_wait ();
302	poll_cb ();
303	}
304	}	733	}
305		734
306	static void create_pipe ()	735	static void create_pipe ()
307	{	736	{
308	if (pipe (respipe))	737	if (pipe (respipe))
…		…
311	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	740	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
312	croak ("cannot set result pipe to nonblocking mode");	741	croak ("cannot set result pipe to nonblocking mode");
313		742
314	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	743	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
315	croak ("cannot set result pipe to nonblocking mode");	744	croak ("cannot set result pipe to nonblocking mode");
316	}
317
318	static void atfork_prepare (void)
319	{
320	pthread_mutex_lock (&reqlock);
321	pthread_mutex_lock (&reslock);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}
329
330	static void atfork_child (void)
331	{
332	aio_req prv;
333
334	started = 0;
335
336	while (reqs)
337	{
338	prv = reqs;
339	reqs = prv->next;
340	free_req (prv);
341	}
342
343	reqs = reqe = 0;
344
345	while (ress)
346	{
347	prv = ress;
348	ress = prv->next;
349	free_req (prv);
350	}
351
352	ress = rese = 0;
353
354	close (respipe [0]);
355	close (respipe [1]);
356	create_pipe ();
357
358	atfork_parent ();
359	}	745	}
360		746
361	/*****************************************************************************/	747	/*****************************************************************************/
362	/* work around various missing functions */	748	/* work around various missing functions */
363		749
…		…
368	/*	754	/*
369	* make our pread/pwrite safe against themselves, but not against	755	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,	756	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.	757	* but that's your problem, not mine.
372	*/	758	*/
373	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374		760
375	static ssize_t	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{	762	{
378	ssize_t res;	763	ssize_t res;
379	off_t ooffset;	764	off_t ooffset;
380		765
381	pthread_mutex_lock (&iolock);	766	LOCK (preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);	769	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&iolock);	771	UNLOCK (preadwritelock);
387		772
388	return res;	773	return res;
389	}	774	}
390		775
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)	776	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
393	{	777	{
394	ssize_t res;	778	ssize_t res;
395	off_t ooffset;	779	off_t ooffset;
396		780
397	pthread_mutex_lock (&iolock);	781	LOCK (preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);	784	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&iolock);	786	UNLOCK (preadwritelock);
403		787
404	return res;	788	return res;
405	}	789	}
406	#endif	790	#endif
407		791
408	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
409	# define fdatasync fsync	793	# define fdatasync fsync
410	#endif	794	#endif
411		795
412	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
413	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
414		798
415	static char readahead_buf[4096];	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
416
417	static ssize_t
418	readahead (int fd, off_t offset, size_t count)
419	{	800	{
		801	dBUF;
		802
420	while (count > 0)	803	while (count > 0)
421	{	804	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
423		806
424	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
425	offset += len;	808	offset += len;
426	count -= len;	809	count -= len;
427	}	810	}
428		811
429	errno = 0;	812	errno = 0;
430	}	813	}
		814
		815	#endif
		816
		817	#if !HAVE_READDIR_R
		818	# define readdir_r aio_readdir_r
		819
		820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		821
		822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		823	{
		824	struct dirent *e;
		825	int errorno;
		826
		827	LOCK (readdirlock);
		828
		829	e = readdir (dirp);
		830	errorno = errno;
		831
		832	if (e)
		833	{
		834	*res = ent;
		835	strcpy (ent->d_name, e->d_name);
		836	}
		837	else
		838	*res = 0;
		839
		840	UNLOCK (readdirlock);
		841
		842	errno = errorno;
		843	return e ? 0 : -1;
		844	}
431	#endif	845	#endif
432		846
433	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
434	static ssize_t
435	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)
436	{	849	{
437	ssize_t res;	850	ssize_t res;
438		851
439	if (!count)	852	if (!count)
440	return 0;	853	return 0;
441		854
		855	#if HAVE_SENDFILE
442	#if __linux	856	# if __linux
443	res = sendfile (ofd, ifd, &offset, count);	857	res = sendfile (ofd, ifd, &offset, count);
444		858
445	#elif __freebsd	859	# elif __freebsd
446	/*	860	/*
447	* Of course, the freebsd sendfile is a dire hack with no thoughts	861	* Of course, the freebsd sendfile is a dire hack with no thoughts
448	* wasted on making it similar to other i/o functions.	862	* wasted on making it similar to other I/O functions.
449	*/	863	*/
450	{	864	{
451	off_t sbytes;	865	off_t sbytes;
452	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
453		867
454	if (!res && errno == EAGAIN)	868	if (res < 0 && sbytes)
		869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
455	res = sbytes;	870	res = sbytes;
456	}	871	}
457		872
458	#elif __hpux	873	# elif __hpux
459	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
460		875
		876	# elif __solaris
		877	{
		878	struct sendfilevec vec;
		879	size_t sbytes;
		880
		881	vec.sfv_fd = ifd;
		882	vec.sfv_flag = 0;
		883	vec.sfv_off = offset;
		884	vec.sfv_len = count;
		885
		886	res = sendfilev (ofd, &vec, 1, &sbytes);
		887
		888	if (res < 0 && sbytes)
		889	res = sbytes;
		890	}
		891
		892	# endif
461	#else	893	#else
462	res = -1;	894	res = -1;
463	errno = ENOSYS;	895	errno = ENOSYS;
464	#endif	896	#endif
465		897
		898	if (res < 0
466	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))	899	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		900	#if __solaris
		901	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		902	#endif
		903	)
		904	)
467	{	905	{
468	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
469	char *buf = malloc (4096);	907	dBUF;
		908
470	res = 0;	909	res = 0;
471		910
472	for (;;)	911	while (count)
473	{	912	{
474	ssize_t cnt;	913	ssize_t cnt;
475		914
476	cnt = pread (ifd, buf, 4096, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
477		916
478	if (cnt <= 0)	917	if (cnt <= 0)
479	{	918	{
480	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
481	break;	920	break;
482	}	921	}
483		922
484	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
485		924
486	if (cnt <= 0)	925	if (cnt <= 0)
487	{	926	{
488	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
489	break;	928	break;
490	}	929	}
491		930
492	offset += cnt;	931	offset += cnt;
493	res += cnt;	932	res += cnt;
		933	count -= cnt;
494	}	934	}
495
496	{
497	int errorno = errno;
498	free (buf);
499	errno = errorno;
500	}
501	}	935	}
502		936
503	return res;	937	return res;
		938	}
		939
		940	/* read a full directory */
		941	static void scandir_ (aio_req req, worker *self)
		942	{
		943	DIR *dirp;
		944	union
		945	{
		946	struct dirent d;
		947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		948	} *u;
		949	struct dirent *entp;
		950	char *name, *names;
		951	int memlen = 4096;
		952	int memofs = 0;
		953	int res = 0;
		954	int errorno;
		955
		956	LOCK (wrklock);
		957	self->dirp = dirp = opendir (req->dataptr);
		958	self->dbuf = u = malloc (sizeof (*u));
		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;
504	}	999	}
505		1000
506	/*****************************************************************************/	1001	/*****************************************************************************/
507		1002
508	static void *
509	aio_proc (void *thr_arg)	1003	static void *aio_proc (void *thr_arg)
510	{	1004	{
511	aio_req req;	1005	aio_req req;
512	int type;	1006	worker *self = (worker *)thr_arg;
513		1007
514	do	1008	for (;;)
515	{	1009	{
516	pthread_mutex_lock (&reqlock);	1010	LOCK (reqlock);
517		1011
518	for (;;)	1012	for (;;)
519	{	1013	{
520	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
521
522	if (reqs)
523	{
524	reqs = reqs->next;
525	if (!reqs) reqe = 0;
526	}
527		1015
528	if (req)	1016	if (req)
529	break;	1017	break;
530		1018
531	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
532	}	1020	}
533		1021
534	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
535		1025
536	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
537		1027
538	type = req->type;	1028	if (!(req->flags & FLAG_CANCELLED))
539
540	switch (type)	1029	switch (req->type)
541	{	1030	{
542	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;
543	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;
544		1033
545	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;
546	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;
547		1036
548	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
549	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
550	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
551		1040
552	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;
553	case REQ_CLOSE: req->result = close (req->fd); break;	1042	case REQ_CLOSE: req->result = close (req->fd); break;
554	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
555	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;
556	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;
557		1049
558	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
559	case REQ_FSYNC: req->result = fsync (req->fd); break;	1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
		1052	case REQ_READDIR: scandir_ (req, self); break;
560		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
561	case REQ_QUIT:	1068	case REQ_QUIT:
562	break;	1069	LOCK (wrklock);
		1070	worker_free (self);
		1071	--started;
		1072	UNLOCK (wrklock);
		1073	return 0;
563		1074
564	default:	1075	default:
565	req->result = ENOSYS;	1076	req->result = ENOSYS;
566	break;	1077	break;
567	}	1078	}
568		1079
569	req->errorno = errno;	1080	req->errorno = errno;
570		1081
571	pthread_mutex_lock (&reslock);	1082	LOCK (reslock);
572		1083
573	req->next = 0;	1084	++npending;
574		1085
575	if (rese)	1086	if (!reqq_push (&res_queue, req))
576	{
577	rese->next = req;
578	rese = req;
579	}
580	else
581	{
582	rese = ress = req;
583
584	/* write a dummy byte to the pipe so fh becomes ready */	1087	/* write a dummy byte to the pipe so fh becomes ready */
585	write (respipe [1], &respipe, 1);	1088	write (respipe [1], &respipe, 1);
586	}
587		1089
588	pthread_mutex_unlock (&reslock);	1090	self->req = 0;
		1091	worker_clear (self);
		1092
		1093	UNLOCK (reslock);
		1094	}
		1095	}
		1096
		1097	/*****************************************************************************/
		1098
		1099	static void atfork_prepare (void)
		1100	{
		1101	LOCK (wrklock);
		1102	LOCK (reqlock);
		1103	LOCK (reslock);
		1104	#if !HAVE_PREADWRITE
		1105	LOCK (preadwritelock);
		1106	#endif
		1107	#if !HAVE_READDIR_R
		1108	LOCK (readdirlock);
		1109	#endif
		1110	}
		1111
		1112	static void atfork_parent (void)
		1113	{
		1114	#if !HAVE_READDIR_R
		1115	UNLOCK (readdirlock);
		1116	#endif
		1117	#if !HAVE_PREADWRITE
		1118	UNLOCK (preadwritelock);
		1119	#endif
		1120	UNLOCK (reslock);
		1121	UNLOCK (reqlock);
		1122	UNLOCK (wrklock);
		1123	}
		1124
		1125	static void atfork_child (void)
		1126	{
		1127	aio_req prv;
		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)
589	}	1136	{
590	while (type != REQ_QUIT);	1137	worker *wrk = wrk_first.next;
591		1138
592	return 0;	1139	if (wrk->req)
		1140	req_free (wrk->req);
		1141
		1142	worker_clear (wrk);
		1143	worker_free (wrk);
		1144	}
		1145
		1146	started = 0;
		1147	nreqs = 0;
		1148
		1149	close (respipe [0]);
		1150	close (respipe [1]);
		1151	create_pipe ();
		1152
		1153	atfork_parent ();
593	}	1154	}
594		1155
595	#define dREQ \	1156	#define dREQ \
596	aio_req req; \	1157	aio_req req; \
		1158	int req_pri = next_pri; \
		1159	next_pri = DEFAULT_PRI + PRI_BIAS; \
597	\	1160	\
598	if (SvOK (callback) && !SvROK (callback)) \	1161	if (SvOK (callback) && !SvROK (callback)) \
599	croak ("clalback must be undef or of reference type"); \	1162	croak ("callback must be undef or of reference type"); \
600	\	1163	\
601	Newz (0, req, 1, aio_cb); \	1164	Newz (0, req, 1, aio_cb); \
602	if (!req) \	1165	if (!req) \
603	croak ("out of memory during aio_req allocation"); \	1166	croak ("out of memory during aio_req allocation"); \
604	\	1167	\
605	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));
606		1176
607	MODULE = IO::AIO PACKAGE = IO::AIO	1177	MODULE = IO::AIO PACKAGE = IO::AIO
608		1178
609	PROTOTYPES: ENABLE	1179	PROTOTYPES: ENABLE
610		1180
611	BOOT:	1181	BOOT:
612	{	1182	{
		1183	HV *stash = gv_stashpv ("IO::AIO", 1);
		1184	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1185	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1186	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1187	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1188	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1189
613	create_pipe ();	1190	create_pipe ();
614	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1191	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
615	}
616		1192
		1193	start_thread ();
		1194	}
		1195
617	void	1196	void
618	min_parallel(nthreads)	1197	min_parallel (int nthreads)
619	int nthreads
620	PROTOTYPE: $	1198	PROTOTYPE: $
621		1199
622	void	1200	void
623	max_parallel(nthreads)	1201	max_parallel (int nthreads)
624	int nthreads
625	PROTOTYPE: $	1202	PROTOTYPE: $
626		1203
627	int	1204	int
628	max_outstanding(nreqs)	1205	max_outstanding (int maxreqs)
629	int nreqs	1206	PROTOTYPE: $
630	PROTOTYPE: $
631	CODE:	1207	CODE:
632	RETVAL = max_outstanding;	1208	RETVAL = max_outstanding;
633	max_outstanding = nreqs;	1209	max_outstanding = maxreqs;
		1210	OUTPUT:
		1211	RETVAL
634		1212
635	void	1213	void
636	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1214	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
637	SV * pathname	1215	SV * pathname
638	int flags	1216	int flags
639	int mode	1217	int mode
640	SV * callback	1218	SV * callback
641	PROTOTYPE: $$$;$	1219	PROTOTYPE: $$$;$
642	CODE:	1220	PPCODE:
643	{	1221	{
644	dREQ;	1222	dREQ;
645		1223
646	req->type = REQ_OPEN;	1224	req->type = REQ_OPEN;
647	req->data = newSVsv (pathname);	1225	req->data = newSVsv (pathname);
648	req->dataptr = SvPVbyte_nolen (req->data);	1226	req->dataptr = SvPVbyte_nolen (req->data);
649	req->fd = flags;	1227	req->fd = flags;
650	req->mode = mode;	1228	req->mode = mode;
651		1229
652	send_req (req);	1230	REQ_SEND;
653	}	1231	}
654		1232
655	void	1233	void
656	aio_close(fh,callback=&PL_sv_undef)	1234	aio_close (fh,callback=&PL_sv_undef)
657	SV * fh	1235	SV * fh
658	SV * callback	1236	SV * callback
659	PROTOTYPE: $;$	1237	PROTOTYPE: $;$
660	ALIAS:	1238	ALIAS:
661	aio_close = REQ_CLOSE	1239	aio_close = REQ_CLOSE
662	aio_fsync = REQ_FSYNC	1240	aio_fsync = REQ_FSYNC
663	aio_fdatasync = REQ_FDATASYNC	1241	aio_fdatasync = REQ_FDATASYNC
664	CODE:	1242	PPCODE:
665	{	1243	{
666	dREQ;	1244	dREQ;
667		1245
668	req->type = ix;	1246	req->type = ix;
669	req->fh = newSVsv (fh);	1247	req->fh = newSVsv (fh);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1248	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
671		1249
672	send_req (req);	1250	REQ_SEND (req);
673	}	1251	}
674		1252
675	void	1253	void
676	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1254	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
677	SV * fh	1255	SV * fh
678	UV offset	1256	UV offset
679	UV length	1257	UV length
680	SV * data	1258	SV * data
681	UV dataoffset	1259	UV dataoffset
682	SV * callback	1260	SV * callback
683	ALIAS:	1261	ALIAS:
684	aio_read = REQ_READ	1262	aio_read = REQ_READ
685	aio_write = REQ_WRITE	1263	aio_write = REQ_WRITE
686	PROTOTYPE: $$$$$;$	1264	PROTOTYPE: $$$$$;$
687	CODE:	1265	PPCODE:
688	{	1266	{
689	aio_req req;	1267	aio_req req;
690	STRLEN svlen;	1268	STRLEN svlen;
691	char *svptr = SvPVbyte (data, svlen);	1269	char *svptr = SvPVbyte (data, svlen);
692		1270
…		…
730	{	1308	{
731	SvREADONLY_on (data);	1309	SvREADONLY_on (data);
732	req->data2ptr = (void *)data;	1310	req->data2ptr = (void *)data;
733	}	1311	}
734		1312
735	send_req (req);	1313	REQ_SEND;
736	}	1314	}
737	}	1315	}
738		1316
739	void	1317	void
740	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1318	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
741	SV * out_fh	1319	SV * out_fh
742	SV * in_fh	1320	SV * in_fh
743	UV in_offset	1321	UV in_offset
744	UV length	1322	UV length
745	SV * callback	1323	SV * callback
746	PROTOTYPE: $$$$;$	1324	PROTOTYPE: $$$$;$
747	CODE:	1325	PPCODE:
748	{	1326	{
749	dREQ;	1327	dREQ;
750		1328
751	req->type = REQ_SENDFILE;	1329	req->type = REQ_SENDFILE;
752	req->fh = newSVsv (out_fh);	1330	req->fh = newSVsv (out_fh);
…		…
754	req->fh2 = newSVsv (in_fh);	1332	req->fh2 = newSVsv (in_fh);
755	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1333	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
756	req->offset = in_offset;	1334	req->offset = in_offset;
757	req->length = length;	1335	req->length = length;
758		1336
759	send_req (req);	1337	REQ_SEND;
760	}	1338	}
761		1339
762	void	1340	void
763	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1341	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
764	SV * fh	1342	SV * fh
765	UV offset	1343	UV offset
766	IV length	1344	IV length
767	SV * callback	1345	SV * callback
768	PROTOTYPE: $$$;$	1346	PROTOTYPE: $$$;$
769	CODE:	1347	PPCODE:
770	{	1348	{
771	dREQ;	1349	dREQ;
772		1350
773	req->type = REQ_READAHEAD;	1351	req->type = REQ_READAHEAD;
774	req->fh = newSVsv (fh);	1352	req->fh = newSVsv (fh);
775	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1353	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
776	req->offset = offset;	1354	req->offset = offset;
777	req->length = length;	1355	req->length = length;
778		1356
779	send_req (req);	1357	REQ_SEND;
780	}	1358	}
781		1359
782	void	1360	void
783	aio_stat(fh_or_path,callback=&PL_sv_undef)	1361	aio_stat (fh_or_path,callback=&PL_sv_undef)
784	SV * fh_or_path	1362	SV * fh_or_path
785	SV * callback	1363	SV * callback
786	ALIAS:	1364	ALIAS:
787	aio_stat = REQ_STAT	1365	aio_stat = REQ_STAT
788	aio_lstat = REQ_LSTAT	1366	aio_lstat = REQ_LSTAT
789	CODE:	1367	PPCODE:
790	{	1368	{
791	dREQ;	1369	dREQ;
792		1370
793	New (0, req->statdata, 1, Stat_t);	1371	New (0, req->statdata, 1, Stat_t);
794	if (!req->statdata)	1372	if (!req->statdata)
795	{	1373	{
796	free_req (req);	1374	req_free (req);
797	croak ("out of memory during aio_req->statdata allocation");	1375	croak ("out of memory during aio_req->statdata allocation");
798	}	1376	}
799		1377
800	if (SvPOK (fh_or_path))	1378	if (SvPOK (fh_or_path))
801	{	1379	{
…		…
808	req->type = REQ_FSTAT;	1386	req->type = REQ_FSTAT;
809	req->fh = newSVsv (fh_or_path);	1387	req->fh = newSVsv (fh_or_path);
810	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1388	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
811	}	1389	}
812		1390
813	send_req (req);	1391	REQ_SEND;
814	}	1392	}
815		1393
816	void	1394	void
817	aio_unlink(pathname,callback=&PL_sv_undef)	1395	aio_unlink (pathname,callback=&PL_sv_undef)
818	SV * pathname	1396	SV * pathname
819	SV * callback	1397	SV * callback
820	ALIAS:	1398	ALIAS:
821	aio_unlink = REQ_UNLINK	1399	aio_unlink = REQ_UNLINK
822	aio_rmdir = REQ_RMDIR	1400	aio_rmdir = REQ_RMDIR
		1401	aio_readdir = REQ_READDIR
823	CODE:	1402	PPCODE:
824	{	1403	{
825	dREQ;	1404	dREQ;
826		1405
827	req->type = ix;	1406	req->type = ix;
828	req->data = newSVsv (pathname);	1407	req->data = newSVsv (pathname);
829	req->dataptr = SvPVbyte_nolen (req->data);	1408	req->dataptr = SvPVbyte_nolen (req->data);
830		1409
831	send_req (req);	1410	REQ_SEND;
832	}	1411	}
833		1412
834	void	1413	void
835	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1414	aio_link (oldpath,newpath,callback=&PL_sv_undef)
836	SV * oldpath	1415	SV * oldpath
837	SV * newpath	1416	SV * newpath
838	SV * callback	1417	SV * callback
		1418	ALIAS:
		1419	aio_link = REQ_LINK
		1420	aio_symlink = REQ_SYMLINK
		1421	aio_rename = REQ_RENAME
839	CODE:	1422	PPCODE:
840	{	1423	{
841	dREQ;	1424	dREQ;
842		1425
843	req->type = REQ_SYMLINK;	1426	req->type = ix;
844	req->fh = newSVsv (oldpath);	1427	req->fh = newSVsv (oldpath);
845	req->data2ptr = SvPVbyte_nolen (req->fh);	1428	req->data2ptr = SvPVbyte_nolen (req->fh);
846	req->data = newSVsv (newpath);	1429	req->data = newSVsv (newpath);
847	req->dataptr = SvPVbyte_nolen (req->data);	1430	req->dataptr = SvPVbyte_nolen (req->data);
848		1431
849	send_req (req);	1432	REQ_SEND;
850	}	1433	}
851		1434
852	void	1435	void
		1436	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1437	SV * pathname
		1438	SV * callback
		1439	UV mode
		1440	UV dev
		1441	PPCODE:
		1442	{
		1443	dREQ;
		1444
		1445	req->type = REQ_MKNOD;
		1446	req->data = newSVsv (pathname);
		1447	req->dataptr = SvPVbyte_nolen (req->data);
		1448	req->mode = (mode_t)mode;
		1449	req->offset = dev;
		1450
		1451	REQ_SEND;
		1452	}
		1453
		1454	void
		1455	aio_busy (delay,callback=&PL_sv_undef)
		1456	double delay
		1457	SV * callback
		1458	PPCODE:
		1459	{
		1460	dREQ;
		1461
		1462	req->type = REQ_BUSY;
		1463	req->fd = delay < 0. ? 0 : delay;
		1464	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1465
		1466	REQ_SEND;
		1467	}
		1468
		1469	void
		1470	aio_group (callback=&PL_sv_undef)
		1471	SV * callback
		1472	PROTOTYPE: ;$
		1473	PPCODE:
		1474	{
		1475	dREQ;
		1476
		1477	req->type = REQ_GROUP;
		1478	req_send (req);
		1479
		1480	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1481	}
		1482
		1483	void
		1484	aio_nop (callback=&PL_sv_undef)
		1485	SV * callback
		1486	PPCODE:
		1487	{
		1488	dREQ;
		1489
		1490	req->type = REQ_NOP;
		1491
		1492	REQ_SEND;
		1493	}
		1494
		1495	int
		1496	aioreq_pri (int pri = 0)
		1497	PROTOTYPE: ;$
		1498	CODE:
		1499	RETVAL = next_pri - PRI_BIAS;
		1500	if (items > 0)
		1501	{
		1502	if (pri < PRI_MIN) pri = PRI_MIN;
		1503	if (pri > PRI_MAX) pri = PRI_MAX;
		1504	next_pri = pri + PRI_BIAS;
		1505	}
		1506	OUTPUT:
		1507	RETVAL
		1508
		1509	void
		1510	aioreq_nice (int nice = 0)
		1511	CODE:
		1512	nice = next_pri - nice;
		1513	if (nice < PRI_MIN) nice = PRI_MIN;
		1514	if (nice > PRI_MAX) nice = PRI_MAX;
		1515	next_pri = nice + PRI_BIAS;
		1516
		1517	void
853	flush()	1518	flush ()
854	PROTOTYPE:	1519	PROTOTYPE:
855	CODE:	1520	CODE:
856	while (nreqs)	1521	while (nreqs)
857	{	1522	{
858	poll_wait ();	1523	poll_wait ();
859	poll_cb ();	1524	poll_cb (0);
860	}	1525	}
861		1526
862	void	1527	void
863	poll()	1528	poll()
864	PROTOTYPE:	1529	PROTOTYPE:
865	CODE:	1530	CODE:
866	if (nreqs)	1531	if (nreqs)
867	{	1532	{
868	poll_wait ();	1533	poll_wait ();
869	poll_cb ();	1534	poll_cb (0);
870	}	1535	}
871		1536
872	int	1537	int
873	poll_fileno()	1538	poll_fileno()
874	PROTOTYPE:	1539	PROTOTYPE:
…		…
879		1544
880	int	1545	int
881	poll_cb(...)	1546	poll_cb(...)
882	PROTOTYPE:	1547	PROTOTYPE:
883	CODE:	1548	CODE:
884	RETVAL = poll_cb ();	1549	RETVAL = poll_cb (0);
		1550	OUTPUT:
		1551	RETVAL
		1552
		1553	int
		1554	poll_some(int max = 0)
		1555	PROTOTYPE: $
		1556	CODE:
		1557	RETVAL = poll_cb (max);
885	OUTPUT:	1558	OUTPUT:
886	RETVAL	1559	RETVAL
887		1560
888	void	1561	void
889	poll_wait()	1562	poll_wait()
…		…
898	CODE:	1571	CODE:
899	RETVAL = nreqs;	1572	RETVAL = nreqs;
900	OUTPUT:	1573	OUTPUT:
901	RETVAL	1574	RETVAL
902		1575
		1576	int
		1577	nready()
		1578	PROTOTYPE:
		1579	CODE:
		1580	RETVAL = get_nready ();
		1581	OUTPUT:
		1582	RETVAL
		1583
		1584	int
		1585	npending()
		1586	PROTOTYPE:
		1587	CODE:
		1588	RETVAL = get_npending ();
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	PROTOTYPES: DISABLE
		1593
		1594	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1595
		1596	void
		1597	cancel (aio_req_ornot req)
		1598	CODE:
		1599	req_cancel (req);
		1600
		1601	void
		1602	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1603	CODE:
		1604	SvREFCNT_dec (req->callback);
		1605	req->callback = newSVsv (callback);
		1606
		1607	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1608
		1609	void
		1610	add (aio_req grp, ...)
		1611	PPCODE:
		1612	{
		1613	int i;
		1614	aio_req req;
		1615
		1616	if (grp->fd == 2)
		1617	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1618
		1619	for (i = 1; i < items; ++i )
		1620	{
		1621	if (GIMME_V != G_VOID)
		1622	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1623
		1624	req = SvAIO_REQ (ST (i));
		1625
		1626	if (req)
		1627	{
		1628	++grp->length;
		1629	req->grp = grp;
		1630
		1631	req->grp_prev = 0;
		1632	req->grp_next = grp->grp_first;
		1633
		1634	if (grp->grp_first)
		1635	grp->grp_first->grp_prev = req;
		1636
		1637	grp->grp_first = req;
		1638	}
		1639	}
		1640	}
		1641
		1642	void
		1643	cancel_subs (aio_req_ornot req)
		1644	CODE:
		1645	req_cancel_subs (req);
		1646
		1647	void
		1648	result (aio_req grp, ...)
		1649	CODE:
		1650	{
		1651	int i;
		1652	AV *av;
		1653
		1654	grp->errorno = errno;
		1655
		1656	av = newAV ();
		1657
		1658	for (i = 1; i < items; ++i )
		1659	av_push (av, newSVsv (ST (i)));
		1660
		1661	SvREFCNT_dec (grp->data);
		1662	grp->data = (SV *)av;
		1663	}
		1664
		1665	void
		1666	errno (aio_req grp, int errorno = errno)
		1667	CODE:
		1668	grp->errorno = errorno;
		1669
		1670	void
		1671	limit (aio_req grp, int limit)
		1672	CODE:
		1673	grp->fd2 = limit;
		1674	aio_grp_feed (grp);
		1675
		1676	void
		1677	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1678	CODE:
		1679	{
		1680	SvREFCNT_dec (grp->fh2);
		1681	grp->fh2 = newSVsv (callback);
		1682
		1683	if (grp->fd2 <= 0)
		1684	grp->fd2 = 2;
		1685
		1686	aio_grp_feed (grp);
		1687	}
		1688

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