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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.35 by root, Tue Aug 23 01:16:50 2005 UTC vs.
Revision 1.80 by root, Fri Oct 27 19:17:23 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
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
…		…
30	# else	43	# else
31	# error sendfile support requested but not available	44	# error sendfile support requested but not available
32	# endif	45	# endif
33	#endif	46	#endif
34		47
		48	/* used for struct dirent, AIX doesn't provide it */
		49	#ifndef NAME_MAX
		50	# define NAME_MAX 4096
		51	#endif
		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
35	#if __ia64	58	#if __ia64
36	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
37	#else	62	#else
38	# 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
39	#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;
40		88
41	enum {	89	enum {
42	REQ_QUIT,	90	REQ_QUIT,
43	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
44	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
45	REQ_SENDFILE,	93	REQ_SENDFILE,
46	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
47	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
48	REQ_UNLINK, REQ_RMDIR,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
49	REQ_SYMLINK,	97	REQ_READDIR,
		98	REQ_LINK, REQ_SYMLINK,
		99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
50	};	101	};
51		102
		103	#define AIO_REQ_KLASS "IO::AIO::REQ"
		104	#define AIO_GRP_KLASS "IO::AIO::GRP"
		105
52	typedef struct aio_cb {	106	typedef struct aio_cb
		107	{
53	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
54		109
55	int type;	110	SV *data, *callback;
56		111	SV *fh, *fh2;
57	int fd, fd2;	112	void *dataptr, *data2ptr;
		113	Stat_t *statdata;
58	off_t offset;	114	off_t offset;
59	size_t length;	115	size_t length;
60	ssize_t result;	116	ssize_t result;
		117
		118	STRLEN dataoffset;
		119	int type;
		120	int fd, fd2;
		121	int errorno;
61	mode_t mode; /* open */	122	mode_t mode; /* open */
62	int errorno;
63	SV *data, *callback;
64	SV *fh, *fh2;
65	void *dataptr, *data2ptr;
66	STRLEN dataoffset;
67		123
68	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;
69	} aio_cb;	129	} aio_cb;
70		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
		134
71	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
		136	typedef aio_cb *aio_req_ornot;
72		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
73	static int started, wanted;	149	static unsigned int started, wanted;
74	static volatile int nreqs;	150
75	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;
76	static int respipe [2];	202	static int respipe [2];
77		203
78	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
79	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
80	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
81		207
82	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
83	static volatile aio_req ress, rese; /* queue start, queue end */
84		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
85	static void free_req (aio_req req)	479	static void req_free (aio_req req)
86	{	480	{
87	if (req->data)	481	if (req->self)
		482	{
		483	sv_unmagic (req->self, PERL_MAGIC_ext);
		484	SvREFCNT_dec (req->self);
		485	}
		486
88	SvREFCNT_dec (req->data);	487	SvREFCNT_dec (req->data);
89
90	if (req->fh)
91	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
92
93	if (req->fh2)
94	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
95
96	if (req->statdata)
97	Safefree (req->statdata);
98
99	if (req->callback)
100	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
		491	Safefree (req->statdata);
		492
		493	if (req->type == REQ_READDIR)
		494	free (req->data2ptr);
101		495
102	Safefree (req);	496	Safefree (req);
103	}	497	}
104		498
105	static void	499	static void req_cancel_subs (aio_req grp)
106	poll_wait ()
107	{	500	{
108	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;
109	{	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	{
110	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
111	FD_ZERO(&rfd);	653	FD_ZERO(&rfd);
112	FD_SET(respipe [0], &rfd);	654	FD_SET(respipe [0], &rfd);
113		655
114	select (respipe [0] + 1, &rfd, 0, 0, 0);	656	select (respipe [0] + 1, &rfd, 0, 0, 0);
115	}	657	}
116	}	658	}
117		659
118	static int	660	static int poll_cb (int max)
119	poll_cb ()
120	{	661	{
121	dSP;	662	dSP;
122	int count = 0;	663	int count = 0;
123	int do_croak = 0;	664	int do_croak = 0;
124	aio_req req;	665	aio_req req;
125		666
126	for (;;)	667	for (;;)
127	{	668	{
128	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
129	req = ress;
130
131	if (req)
132	{	670	{
133	ress = req->next;	671	maybe_start_thread ();
134		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
135	if (!ress)	676	if (req)
136	{	677	{
137	/* read any signals sent by the worker threads */	678	--npending;
138	char buf [32];
139	while (read (respipe [0], buf, 32) == 32)
140	;
141		679
142	rese = 0;	680	if (!res_queue.size)
143	}
144	}
145
146	pthread_mutex_unlock (&reslock);
147
148	if (!req)
149	break;
150
151	nreqs--;
152
153	if (req->type == REQ_QUIT)
154	started--;
155	else
156	{
157	int errorno = errno;
158	errno = req->errorno;
159
160	if (req->type == REQ_READ)
161	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
162
163	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
164	SvREADONLY_off (req->data);
165
166	if (req->statdata)
167	{
168	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
169	PL_laststatval = req->result;
170	PL_statcache = *(req->statdata);
171	}
172
173	ENTER;
174	PUSHMARK (SP);
175	XPUSHs (sv_2mortal (newSViv (req->result)));
176
177	if (req->type == REQ_OPEN)
178	{
179	/* convert fd to fh */
180	SV *fh;
181
182	PUTBACK;
183	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
184	SPAGAIN;
185
186	fh = SvREFCNT_inc (POPs);
187
188	PUSHMARK (SP);
189	XPUSHs (sv_2mortal (fh));
190	}
191
192	if (SvOK (req->callback))
193	{
194	PUTBACK;
195	call_sv (req->callback, G_VOID | G_EVAL);
196	SPAGAIN;
197
198	if (SvTRUE (ERRSV))
199	{	681	{
200	free_req (req);	682	/* read any signals sent by the worker threads */
		683	char buf [32];
		684	while (read (respipe [0], buf, 32) == 32)
201	croak (0);	685	;
202	}	686	}
203	}	687	}
204		688
205	LEAVE;	689	UNLOCK (reslock);
206		690
207	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
208	count++;	718	count++;
		719	}
		720
		721	req_free (req);
209	}	722	}
210		723
211	free_req (req);	724	if (nreqs <= max_outstanding)
		725	break;
		726
		727	poll_wait ();
		728
		729	max = 0;
212	}	730	}
213		731
214	return count;	732	return count;
215	}
216
217	static void *aio_proc(void *arg);
218
219	static void
220	start_thread (void)
221	{
222	sigset_t fullsigset, oldsigset;
223	pthread_t tid;
224	pthread_attr_t attr;
225
226	pthread_attr_init (&attr);
227	pthread_attr_setstacksize (&attr, STACKSIZE);
228	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
229
230	sigfillset (&fullsigset);
231	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
232
233	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
234	started++;
235
236	sigprocmask (SIG_SETMASK, &oldsigset, 0);
237	}
238
239	static void
240	send_req (aio_req req)
241	{
242	while (started < wanted && nreqs >= started)
243	start_thread ();
244
245	nreqs++;
246
247	pthread_mutex_lock (&reqlock);
248
249	req->next = 0;
250
251	if (reqe)
252	{
253	reqe->next = req;
254	reqe = req;
255	}
256	else
257	reqe = reqs = req;
258
259	pthread_cond_signal (&reqwait);
260	pthread_mutex_unlock (&reqlock);
261
262	if (nreqs > max_outstanding)
263	for (;;)
264	{
265	poll_cb ();
266
267	if (nreqs <= max_outstanding)
268	break;
269
270	poll_wait ();
271	}
272	}
273
274	static void
275	end_thread (void)
276	{
277	aio_req req;
278	Newz (0, req, 1, aio_cb);
279	req->type = REQ_QUIT;
280
281	send_req (req);
282	}
283
284	static void min_parallel (int nthreads)
285	{
286	if (wanted < nthreads)
287	wanted = nthreads;
288	}
289
290	static void max_parallel (int nthreads)
291	{
292	int cur = started;
293
294	if (wanted > nthreads)
295	wanted = nthreads;
296
297	while (cur > wanted)
298	{
299	end_thread ();
300	cur--;
301	}
302
303	while (started > wanted)
304	{
305	poll_wait ();
306	poll_cb ();
307	}
308	}	733	}
309		734
310	static void create_pipe ()	735	static void create_pipe ()
311	{	736	{
312	if (pipe (respipe))	737	if (pipe (respipe))
…		…
316	croak ("cannot set result pipe to nonblocking mode");	741	croak ("cannot set result pipe to nonblocking mode");
317		742
318	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	743	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
319	croak ("cannot set result pipe to nonblocking mode");	744	croak ("cannot set result pipe to nonblocking mode");
320	}	745	}
321
322	static void atfork_prepare (void)
323	{
324	pthread_mutex_lock (&reqlock);
325	pthread_mutex_lock (&reslock);
326	}
327
328	static void atfork_parent (void)
329	{
330	pthread_mutex_unlock (&reslock);
331	pthread_mutex_unlock (&reqlock);
332	}
333
334	static void atfork_child (void)
335	{
336	aio_req prv;
337
338	started = 0;
339
340	while (reqs)
341	{
342	prv = reqs;
343	reqs = prv->next;
344	free_req (prv);
345	}
346
347	reqs = reqe = 0;
348
349	while (ress)
350	{
351	prv = ress;
352	ress = prv->next;
353	free_req (prv);
354	}
355
356	ress = rese = 0;
357
358	close (respipe [0]);
359	close (respipe [1]);
360	create_pipe ();
361
362	atfork_parent ();
363	}
364
365	/* currently noops */
366	#define LOCK_FD(fd) do { } while (0)
367	#define UNLOCK_FD(fd) do { } while (0)
368		746
369	/*****************************************************************************/	747	/*****************************************************************************/
370	/* work around various missing functions */	748	/* work around various missing functions */
371		749
372	#if !HAVE_PREADWRITE	750	#if !HAVE_PREADWRITE
…		…
376	/*	754	/*
377	* make our pread/pwrite safe against themselves, but not against	755	* make our pread/pwrite safe against themselves, but not against
378	* 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,
379	* but that's your problem, not mine.	757	* but that's your problem, not mine.
380	*/	758	*/
381	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
382		760
383	static ssize_t	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
384	pread (int fd, void *buf, size_t count, off_t offset)
385	{	762	{
386	ssize_t res;	763	ssize_t res;
387	off_t ooffset;	764	off_t ooffset;
388		765
389	LOCK_FD (fd);	766	LOCK (preadwritelock);
390	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
391	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
392	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
393	res = read (fd, buf, count);	769	res = read (fd, buf, count);
394	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
395	pthread_mutex_unlock (&iolock);	771	UNLOCK (preadwritelock);
396	UNLOCK_FD (d);
397		772
398	return res;	773	return res;
399	}	774	}
400		775
401	static ssize_t
402	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)
403	{	777	{
404	ssize_t res;	778	ssize_t res;
405	off_t ooffset;	779	off_t ooffset;
406		780
407	LOCK_FD (fd);	781	LOCK (preadwritelock);
408	pthread_mutex_lock (&iolock); /* replace by LOCK_FD and private buffer */
409	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
410	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
411	res = write (fd, buf, count);	784	res = write (fd, buf, count);
412	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
413	pthread_mutex_unlock (&iolock);	786	UNLOCK (preadwritelock);
414	UNLOCK_FD (d);
415		787
416	return res;	788	return res;
417	}	789	}
418	#endif	790	#endif
419		791
420	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
421	# define fdatasync fsync	793	# define fdatasync fsync
422	#endif	794	#endif
423		795
424	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
425	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
426		798
427	static char readahead_buf[4096];	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
428
429	static ssize_t
430	readahead (int fd, off_t offset, size_t count)
431	{	800	{
		801	dBUF;
		802
432	while (count > 0)	803	while (count > 0)
433	{	804	{
434	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
435		806
436	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
437	offset += len;	808	offset += len;
438	count -= len;	809	count -= len;
439	}	810	}
440		811
441	errno = 0;	812	errno = 0;
442	}	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	}
443	#endif	845	#endif
444		846
445	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
446	static ssize_t
447	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)
448	{	849	{
449	ssize_t res;	850	ssize_t res;
450		851
451	if (!count)	852	if (!count)
452	return 0;	853	return 0;
453
454	LOCK_FD (ofd);
455		854
456	#if HAVE_SENDFILE	855	#if HAVE_SENDFILE
457	# if __linux	856	# if __linux
458	res = sendfile (ofd, ifd, &offset, count);	857	res = sendfile (ofd, ifd, &offset, count);
459		858
460	# elif __freebsd	859	# elif __freebsd
461	/*	860	/*
462	* 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
463	* wasted on making it similar to other I/O functions.	862	* wasted on making it similar to other I/O functions.
464	*/	863	*/
465	{	864	{
466	off_t sbytes;	865	off_t sbytes;
467	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
468		867
469	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
470	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
471	res = sbytes;	870	res = sbytes;
472	}	871	}
473		872
474	# elif __hpux	873	# elif __hpux
475	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
476		875
477	# elif __solaris	876	# elif __solaris
478	{	877	{
479	struct sendfilevec vec;	878	struct sendfilevec vec;
480	size_t sbytes;	879	size_t sbytes;
481		880
482	vec.sfv_fd = ifd;	881	vec.sfv_fd = ifd;
483	vec.sfv_flag = 0;	882	vec.sfv_flag = 0;
484	vec.sfv_off = offset;	883	vec.sfv_off = offset;
485	vec.sfv_len = count;	884	vec.sfv_len = count;
486		885
487	res = sendfilev (ofd, &vec, 1, &sbytes);	886	res = sendfilev (ofd, &vec, 1, &sbytes);
488		887
489	if (res < 0 && sbytes)	888	if (res < 0 && sbytes)
490	res = sbytes;	889	res = sbytes;
491	}	890	}
492		891
493	# else
494	res = -1;
495	errno = ENOSYS;
496	# endif	892	# endif
		893	#else
		894	res = -1;
		895	errno = ENOSYS;
497	#endif	896	#endif
498		897
499	if (res < 0	898	if (res < 0
500	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	899	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
501	#if __solaris	900	#if __solaris
502	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	901	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
503	#endif	902	#endif
504	)	903	)
505	)	904	)
506	{	905	{
507	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
508	char *buf = malloc (4096);	907	dBUF;
		908
509	res = 0;	909	res = 0;
510		910
511	for (;;)	911	while (count)
512	{	912	{
513	ssize_t cnt;	913	ssize_t cnt;
514		914
515	cnt = pread (ifd, buf, 4096, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
516		916
517	if (cnt <= 0)	917	if (cnt <= 0)
518	{	918	{
519	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
520	break;	920	break;
521	}	921	}
522		922
523	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
524		924
525	if (cnt <= 0)	925	if (cnt <= 0)
526	{	926	{
527	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
528	break;	928	break;
529	}	929	}
530		930
531	offset += cnt;	931	offset += cnt;
532	res += cnt;	932	res += cnt;
		933	count -= cnt;
533	}	934	}
534
535	{
536	int errorno = errno;
537	free (buf);
538	errno = errorno;
539	}
540	}	935	}
541		936
542	UNLOCK_FD (ofd);
543
544	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;
545	}	999	}
546		1000
547	/*****************************************************************************/	1001	/*****************************************************************************/
548		1002
549	static void *
550	aio_proc (void *thr_arg)	1003	static void *aio_proc (void *thr_arg)
551	{	1004	{
552	aio_req req;	1005	aio_req req;
553	int type;	1006	worker *self = (worker *)thr_arg;
554		1007
555	do	1008	for (;;)
556	{	1009	{
557	pthread_mutex_lock (&reqlock);	1010	LOCK (reqlock);
558		1011
559	for (;;)	1012	for (;;)
560	{	1013	{
561	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
562
563	if (reqs)
564	{
565	reqs = reqs->next;
566	if (!reqs) reqe = 0;
567	}
568		1015
569	if (req)	1016	if (req)
570	break;	1017	break;
571		1018
572	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
573	}	1020	}
574		1021
575	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
576		1025
577	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
578		1027
579	type = req->type;	1028	if (!(req->flags & FLAG_CANCELLED))
580
581	switch (type)	1029	switch (req->type)
582	{	1030	{
583	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;
584	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;
585		1033
586	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;
587	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;
588		1036
589	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
590	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
591	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
592		1040
593	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;
594	case REQ_CLOSE: req->result = close (req->fd); break;	1042	case REQ_CLOSE: req->result = close (req->fd); break;
595	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
596	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;
597	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
598		1048
599	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1049	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
600	case REQ_FSYNC: req->result = fsync (req->fd); break;	1050	case REQ_FSYNC: req->result = fsync (req->fd); break;
		1051	case REQ_READDIR: scandir_ (req, self); break;
601		1052
		1053	case REQ_BUSY:
		1054	{
		1055	struct timeval tv;
		1056
		1057	tv.tv_sec = req->fd;
		1058	tv.tv_usec = req->fd2;
		1059
		1060	req->result = select (0, 0, 0, 0, &tv);
		1061	}
		1062
		1063	case REQ_GROUP:
		1064	case REQ_NOP:
		1065	break;
		1066
602	case REQ_QUIT:	1067	case REQ_QUIT:
603	break;	1068	LOCK (wrklock);
		1069	worker_free (self);
		1070	--started;
		1071	UNLOCK (wrklock);
		1072	return 0;
604		1073
605	default:	1074	default:
606	req->result = ENOSYS;	1075	req->result = ENOSYS;
607	break;	1076	break;
608	}	1077	}
609		1078
610	req->errorno = errno;	1079	req->errorno = errno;
611		1080
612	pthread_mutex_lock (&reslock);	1081	LOCK (reslock);
613		1082
614	req->next = 0;	1083	++npending;
615		1084
616	if (rese)	1085	if (!reqq_push (&res_queue, req))
617	{
618	rese->next = req;
619	rese = req;
620	}
621	else
622	{
623	rese = ress = req;
624
625	/* write a dummy byte to the pipe so fh becomes ready */	1086	/* write a dummy byte to the pipe so fh becomes ready */
626	write (respipe [1], &respipe, 1);	1087	write (respipe [1], &respipe, 1);
627	}
628		1088
629	pthread_mutex_unlock (&reslock);	1089	self->req = 0;
		1090	worker_clear (self);
		1091
		1092	UNLOCK (reslock);
		1093	}
		1094	}
		1095
		1096	/*****************************************************************************/
		1097
		1098	static void atfork_prepare (void)
		1099	{
		1100	LOCK (wrklock);
		1101	LOCK (reqlock);
		1102	LOCK (reslock);
		1103	#if !HAVE_PREADWRITE
		1104	LOCK (preadwritelock);
		1105	#endif
		1106	#if !HAVE_READDIR_R
		1107	LOCK (readdirlock);
		1108	#endif
		1109	}
		1110
		1111	static void atfork_parent (void)
		1112	{
		1113	#if !HAVE_READDIR_R
		1114	UNLOCK (readdirlock);
		1115	#endif
		1116	#if !HAVE_PREADWRITE
		1117	UNLOCK (preadwritelock);
		1118	#endif
		1119	UNLOCK (reslock);
		1120	UNLOCK (reqlock);
		1121	UNLOCK (wrklock);
		1122	}
		1123
		1124	static void atfork_child (void)
		1125	{
		1126	aio_req prv;
		1127
		1128	while (prv = reqq_shift (&req_queue))
		1129	req_free (prv);
		1130
		1131	while (prv = reqq_shift (&res_queue))
		1132	req_free (prv);
		1133
		1134	while (wrk_first.next != &wrk_first)
630	}	1135	{
631	while (type != REQ_QUIT);	1136	worker *wrk = wrk_first.next;
632		1137
633	return 0;	1138	if (wrk->req)
		1139	req_free (wrk->req);
		1140
		1141	worker_clear (wrk);
		1142	worker_free (wrk);
		1143	}
		1144
		1145	started = 0;
		1146	nreqs = 0;
		1147
		1148	close (respipe [0]);
		1149	close (respipe [1]);
		1150	create_pipe ();
		1151
		1152	atfork_parent ();
634	}	1153	}
635		1154
636	#define dREQ \	1155	#define dREQ \
637	aio_req req; \	1156	aio_req req; \
		1157	int req_pri = next_pri; \
		1158	next_pri = DEFAULT_PRI + PRI_BIAS; \
638	\	1159	\
639	if (SvOK (callback) && !SvROK (callback)) \	1160	if (SvOK (callback) && !SvROK (callback)) \
640	croak ("clalback must be undef or of reference type"); \	1161	croak ("callback must be undef or of reference type"); \
641	\	1162	\
642	Newz (0, req, 1, aio_cb); \	1163	Newz (0, req, 1, aio_cb); \
643	if (!req) \	1164	if (!req) \
644	croak ("out of memory during aio_req allocation"); \	1165	croak ("out of memory during aio_req allocation"); \
645	\	1166	\
646	req->callback = newSVsv (callback);	1167	req->callback = newSVsv (callback); \
		1168	req->pri = req_pri
		1169
		1170	#define REQ_SEND \
		1171	req_send (req); \
		1172	\
		1173	if (GIMME_V != G_VOID) \
		1174	XPUSHs (req_sv (req, AIO_REQ_KLASS));
647		1175
648	MODULE = IO::AIO PACKAGE = IO::AIO	1176	MODULE = IO::AIO PACKAGE = IO::AIO
649		1177
650	PROTOTYPES: ENABLE	1178	PROTOTYPES: ENABLE
651		1179
652	BOOT:	1180	BOOT:
653	{	1181	{
		1182	HV *stash = gv_stashpv ("IO::AIO", 1);
		1183	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1184	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1185	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1186
654	create_pipe ();	1187	create_pipe ();
655	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1188	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
656	}
657		1189
		1190	start_thread ();
		1191	}
		1192
658	void	1193	void
659	min_parallel(nthreads)	1194	min_parallel (int nthreads)
660	int nthreads
661	PROTOTYPE: $	1195	PROTOTYPE: $
662		1196
663	void	1197	void
664	max_parallel(nthreads)	1198	max_parallel (int nthreads)
665	int nthreads
666	PROTOTYPE: $	1199	PROTOTYPE: $
667		1200
668	int	1201	int
669	max_outstanding(nreqs)	1202	max_outstanding (int maxreqs)
670	int nreqs	1203	PROTOTYPE: $
671	PROTOTYPE: $
672	CODE:	1204	CODE:
673	RETVAL = max_outstanding;	1205	RETVAL = max_outstanding;
674	max_outstanding = nreqs;	1206	max_outstanding = maxreqs;
		1207	OUTPUT:
		1208	RETVAL
675		1209
676	void	1210	void
677	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1211	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
678	SV * pathname	1212	SV * pathname
679	int flags	1213	int flags
680	int mode	1214	int mode
681	SV * callback	1215	SV * callback
682	PROTOTYPE: $$$;$	1216	PROTOTYPE: $$$;$
683	CODE:	1217	PPCODE:
684	{	1218	{
685	dREQ;	1219	dREQ;
686		1220
687	req->type = REQ_OPEN;	1221	req->type = REQ_OPEN;
688	req->data = newSVsv (pathname);	1222	req->data = newSVsv (pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);	1223	req->dataptr = SvPVbyte_nolen (req->data);
690	req->fd = flags;	1224	req->fd = flags;
691	req->mode = mode;	1225	req->mode = mode;
692		1226
693	send_req (req);	1227	REQ_SEND;
694	}	1228	}
695		1229
696	void	1230	void
697	aio_close(fh,callback=&PL_sv_undef)	1231	aio_close (fh,callback=&PL_sv_undef)
698	SV * fh	1232	SV * fh
699	SV * callback	1233	SV * callback
700	PROTOTYPE: $;$	1234	PROTOTYPE: $;$
701	ALIAS:	1235	ALIAS:
702	aio_close = REQ_CLOSE	1236	aio_close = REQ_CLOSE
703	aio_fsync = REQ_FSYNC	1237	aio_fsync = REQ_FSYNC
704	aio_fdatasync = REQ_FDATASYNC	1238	aio_fdatasync = REQ_FDATASYNC
705	CODE:	1239	PPCODE:
706	{	1240	{
707	dREQ;	1241	dREQ;
708		1242
709	req->type = ix;	1243	req->type = ix;
710	req->fh = newSVsv (fh);	1244	req->fh = newSVsv (fh);
711	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1245	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
712		1246
713	send_req (req);	1247	REQ_SEND (req);
714	}	1248	}
715		1249
716	void	1250	void
717	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1251	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
718	SV * fh	1252	SV * fh
719	UV offset	1253	UV offset
720	UV length	1254	UV length
721	SV * data	1255	SV * data
722	UV dataoffset	1256	UV dataoffset
723	SV * callback	1257	SV * callback
724	ALIAS:	1258	ALIAS:
725	aio_read = REQ_READ	1259	aio_read = REQ_READ
726	aio_write = REQ_WRITE	1260	aio_write = REQ_WRITE
727	PROTOTYPE: $$$$$;$	1261	PROTOTYPE: $$$$$;$
728	CODE:	1262	PPCODE:
729	{	1263	{
730	aio_req req;	1264	aio_req req;
731	STRLEN svlen;	1265	STRLEN svlen;
732	char *svptr = SvPVbyte (data, svlen);	1266	char *svptr = SvPVbyte (data, svlen);
733		1267
…		…
771	{	1305	{
772	SvREADONLY_on (data);	1306	SvREADONLY_on (data);
773	req->data2ptr = (void *)data;	1307	req->data2ptr = (void *)data;
774	}	1308	}
775		1309
776	send_req (req);	1310	REQ_SEND;
777	}	1311	}
778	}	1312	}
779		1313
780	void	1314	void
781	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1315	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
782	SV * out_fh	1316	SV * out_fh
783	SV * in_fh	1317	SV * in_fh
784	UV in_offset	1318	UV in_offset
785	UV length	1319	UV length
786	SV * callback	1320	SV * callback
787	PROTOTYPE: $$$$;$	1321	PROTOTYPE: $$$$;$
788	CODE:	1322	PPCODE:
789	{	1323	{
790	dREQ;	1324	dREQ;
791		1325
792	req->type = REQ_SENDFILE;	1326	req->type = REQ_SENDFILE;
793	req->fh = newSVsv (out_fh);	1327	req->fh = newSVsv (out_fh);
…		…
795	req->fh2 = newSVsv (in_fh);	1329	req->fh2 = newSVsv (in_fh);
796	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1330	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
797	req->offset = in_offset;	1331	req->offset = in_offset;
798	req->length = length;	1332	req->length = length;
799		1333
800	send_req (req);	1334	REQ_SEND;
801	}	1335	}
802		1336
803	void	1337	void
804	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1338	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
805	SV * fh	1339	SV * fh
806	UV offset	1340	UV offset
807	IV length	1341	IV length
808	SV * callback	1342	SV * callback
809	PROTOTYPE: $$$;$	1343	PROTOTYPE: $$$;$
810	CODE:	1344	PPCODE:
811	{	1345	{
812	dREQ;	1346	dREQ;
813		1347
814	req->type = REQ_READAHEAD;	1348	req->type = REQ_READAHEAD;
815	req->fh = newSVsv (fh);	1349	req->fh = newSVsv (fh);
816	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1350	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
817	req->offset = offset;	1351	req->offset = offset;
818	req->length = length;	1352	req->length = length;
819		1353
820	send_req (req);	1354	REQ_SEND;
821	}	1355	}
822		1356
823	void	1357	void
824	aio_stat(fh_or_path,callback=&PL_sv_undef)	1358	aio_stat (fh_or_path,callback=&PL_sv_undef)
825	SV * fh_or_path	1359	SV * fh_or_path
826	SV * callback	1360	SV * callback
827	ALIAS:	1361	ALIAS:
828	aio_stat = REQ_STAT	1362	aio_stat = REQ_STAT
829	aio_lstat = REQ_LSTAT	1363	aio_lstat = REQ_LSTAT
830	CODE:	1364	PPCODE:
831	{	1365	{
832	dREQ;	1366	dREQ;
833		1367
834	New (0, req->statdata, 1, Stat_t);	1368	New (0, req->statdata, 1, Stat_t);
835	if (!req->statdata)	1369	if (!req->statdata)
836	{	1370	{
837	free_req (req);	1371	req_free (req);
838	croak ("out of memory during aio_req->statdata allocation");	1372	croak ("out of memory during aio_req->statdata allocation");
839	}	1373	}
840		1374
841	if (SvPOK (fh_or_path))	1375	if (SvPOK (fh_or_path))
842	{	1376	{
…		…
849	req->type = REQ_FSTAT;	1383	req->type = REQ_FSTAT;
850	req->fh = newSVsv (fh_or_path);	1384	req->fh = newSVsv (fh_or_path);
851	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1385	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
852	}	1386	}
853		1387
854	send_req (req);	1388	REQ_SEND;
855	}	1389	}
856		1390
857	void	1391	void
858	aio_unlink(pathname,callback=&PL_sv_undef)	1392	aio_unlink (pathname,callback=&PL_sv_undef)
859	SV * pathname	1393	SV * pathname
860	SV * callback	1394	SV * callback
861	ALIAS:	1395	ALIAS:
862	aio_unlink = REQ_UNLINK	1396	aio_unlink = REQ_UNLINK
863	aio_rmdir = REQ_RMDIR	1397	aio_rmdir = REQ_RMDIR
		1398	aio_readdir = REQ_READDIR
864	CODE:	1399	PPCODE:
865	{	1400	{
866	dREQ;	1401	dREQ;
867		1402
868	req->type = ix;	1403	req->type = ix;
869	req->data = newSVsv (pathname);	1404	req->data = newSVsv (pathname);
870	req->dataptr = SvPVbyte_nolen (req->data);	1405	req->dataptr = SvPVbyte_nolen (req->data);
871		1406
872	send_req (req);	1407	REQ_SEND;
873	}	1408	}
874		1409
875	void	1410	void
876	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1411	aio_link (oldpath,newpath,callback=&PL_sv_undef)
877	SV * oldpath	1412	SV * oldpath
878	SV * newpath	1413	SV * newpath
879	SV * callback	1414	SV * callback
		1415	ALIAS:
		1416	aio_link = REQ_LINK
		1417	aio_symlink = REQ_SYMLINK
		1418	aio_rename = REQ_RENAME
880	CODE:	1419	PPCODE:
881	{	1420	{
882	dREQ;	1421	dREQ;
883		1422
884	req->type = REQ_SYMLINK;	1423	req->type = ix;
885	req->fh = newSVsv (oldpath);	1424	req->fh = newSVsv (oldpath);
886	req->data2ptr = SvPVbyte_nolen (req->fh);	1425	req->data2ptr = SvPVbyte_nolen (req->fh);
887	req->data = newSVsv (newpath);	1426	req->data = newSVsv (newpath);
888	req->dataptr = SvPVbyte_nolen (req->data);	1427	req->dataptr = SvPVbyte_nolen (req->data);
889		1428
890	send_req (req);	1429	REQ_SEND;
891	}	1430	}
892		1431
893	void	1432	void
		1433	aio_busy (delay,callback=&PL_sv_undef)
		1434	double delay
		1435	SV * callback
		1436	PPCODE:
		1437	{
		1438	dREQ;
		1439
		1440	req->type = REQ_BUSY;
		1441	req->fd = delay < 0. ? 0 : delay;
		1442	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1443
		1444	REQ_SEND;
		1445	}
		1446
		1447	void
		1448	aio_group (callback=&PL_sv_undef)
		1449	SV * callback
		1450	PROTOTYPE: ;$
		1451	PPCODE:
		1452	{
		1453	dREQ;
		1454
		1455	req->type = REQ_GROUP;
		1456	req_send (req);
		1457
		1458	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1459	}
		1460
		1461	void
		1462	aio_nop (callback=&PL_sv_undef)
		1463	SV * callback
		1464	PPCODE:
		1465	{
		1466	dREQ;
		1467
		1468	req->type = REQ_NOP;
		1469
		1470	REQ_SEND;
		1471	}
		1472
		1473	int
		1474	aioreq_pri (int pri = 0)
		1475	PROTOTYPE: ;$
		1476	CODE:
		1477	RETVAL = next_pri - PRI_BIAS;
		1478	if (items > 0)
		1479	{
		1480	if (pri < PRI_MIN) pri = PRI_MIN;
		1481	if (pri > PRI_MAX) pri = PRI_MAX;
		1482	next_pri = pri + PRI_BIAS;
		1483	}
		1484	OUTPUT:
		1485	RETVAL
		1486
		1487	void
		1488	aioreq_nice (int nice = 0)
		1489	CODE:
		1490	nice = next_pri - nice;
		1491	if (nice < PRI_MIN) nice = PRI_MIN;
		1492	if (nice > PRI_MAX) nice = PRI_MAX;
		1493	next_pri = nice + PRI_BIAS;
		1494
		1495	void
894	flush()	1496	flush ()
895	PROTOTYPE:	1497	PROTOTYPE:
896	CODE:	1498	CODE:
897	while (nreqs)	1499	while (nreqs)
898	{	1500	{
899	poll_wait ();	1501	poll_wait ();
900	poll_cb ();	1502	poll_cb (0);
901	}	1503	}
902		1504
903	void	1505	void
904	poll()	1506	poll()
905	PROTOTYPE:	1507	PROTOTYPE:
906	CODE:	1508	CODE:
907	if (nreqs)	1509	if (nreqs)
908	{	1510	{
909	poll_wait ();	1511	poll_wait ();
910	poll_cb ();	1512	poll_cb (0);
911	}	1513	}
912		1514
913	int	1515	int
914	poll_fileno()	1516	poll_fileno()
915	PROTOTYPE:	1517	PROTOTYPE:
…		…
920		1522
921	int	1523	int
922	poll_cb(...)	1524	poll_cb(...)
923	PROTOTYPE:	1525	PROTOTYPE:
924	CODE:	1526	CODE:
925	RETVAL = poll_cb ();	1527	RETVAL = poll_cb (0);
		1528	OUTPUT:
		1529	RETVAL
		1530
		1531	int
		1532	poll_some(int max = 0)
		1533	PROTOTYPE: $
		1534	CODE:
		1535	RETVAL = poll_cb (max);
926	OUTPUT:	1536	OUTPUT:
927	RETVAL	1537	RETVAL
928		1538
929	void	1539	void
930	poll_wait()	1540	poll_wait()
…		…
939	CODE:	1549	CODE:
940	RETVAL = nreqs;	1550	RETVAL = nreqs;
941	OUTPUT:	1551	OUTPUT:
942	RETVAL	1552	RETVAL
943		1553
		1554	int
		1555	nready()
		1556	PROTOTYPE:
		1557	CODE:
		1558	RETVAL = get_nready ();
		1559	OUTPUT:
		1560	RETVAL
		1561
		1562	int
		1563	npending()
		1564	PROTOTYPE:
		1565	CODE:
		1566	RETVAL = get_npending ();
		1567	OUTPUT:
		1568	RETVAL
		1569
		1570	PROTOTYPES: DISABLE
		1571
		1572	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1573
		1574	void
		1575	cancel (aio_req_ornot req)
		1576	CODE:
		1577	req_cancel (req);
		1578
		1579	void
		1580	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1581	CODE:
		1582	SvREFCNT_dec (req->callback);
		1583	req->callback = newSVsv (callback);
		1584
		1585	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1586
		1587	void
		1588	add (aio_req grp, ...)
		1589	PPCODE:
		1590	{
		1591	int i;
		1592	aio_req req;
		1593
		1594	if (grp->fd == 2)
		1595	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1596
		1597	for (i = 1; i < items; ++i )
		1598	{
		1599	if (GIMME_V != G_VOID)
		1600	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1601
		1602	req = SvAIO_REQ (ST (i));
		1603
		1604	if (req)
		1605	{
		1606	++grp->length;
		1607	req->grp = grp;
		1608
		1609	req->grp_prev = 0;
		1610	req->grp_next = grp->grp_first;
		1611
		1612	if (grp->grp_first)
		1613	grp->grp_first->grp_prev = req;
		1614
		1615	grp->grp_first = req;
		1616	}
		1617	}
		1618	}
		1619
		1620	void
		1621	cancel_subs (aio_req_ornot req)
		1622	CODE:
		1623	req_cancel_subs (req);
		1624
		1625	void
		1626	result (aio_req grp, ...)
		1627	CODE:
		1628	{
		1629	int i;
		1630	AV *av;
		1631
		1632	grp->errorno = errno;
		1633
		1634	av = newAV ();
		1635
		1636	for (i = 1; i < items; ++i )
		1637	av_push (av, newSVsv (ST (i)));
		1638
		1639	SvREFCNT_dec (grp->data);
		1640	grp->data = (SV *)av;
		1641	}
		1642
		1643	void
		1644	errno (aio_req grp, int errorno = errno)
		1645	CODE:
		1646	grp->errorno = errorno;
		1647
		1648	void
		1649	limit (aio_req grp, int limit)
		1650	CODE:
		1651	grp->fd2 = limit;
		1652	aio_grp_feed (grp);
		1653
		1654	void
		1655	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1656	CODE:
		1657	{
		1658	SvREFCNT_dec (grp->fh2);
		1659	grp->fh2 = newSVsv (callback);
		1660
		1661	if (grp->fd2 <= 0)
		1662	grp->fd2 = 2;
		1663
		1664	aio_grp_feed (grp);
		1665	}
		1666

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