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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC vs.
Revision 1.80 by root, Fri Oct 27 19:17:23 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
…		…
9		18
10	#include <pthread.h>	19	#include <pthread.h>
11		20
12	#include <stddef.h>	21	#include <stddef.h>
13	#include <errno.h>	22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
14	#include <sys/types.h>	25	#include <sys/types.h>
15	#include <sys/stat.h>	26	#include <sys/stat.h>
16	#include <limits.h>	27	#include <limits.h>
17	#include <unistd.h>	28	#include <unistd.h>
18	#include <fcntl.h>	29	#include <fcntl.h>
…		…
37	/* used for struct dirent, AIX doesn't provide it */	48	/* used for struct dirent, AIX doesn't provide it */
38	#ifndef NAME_MAX	49	#ifndef NAME_MAX
39	# define NAME_MAX 4096	50	# define NAME_MAX 4096
40	#endif	51	#endif
41		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
		57
42	#if __ia64	58	#if __ia64
43	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	62	#else
45	# define STACKSIZE 8192	63	# define STACKSIZE 16384
		64	#endif
		65
		66	/* wether word reads are potentially non-atomic.
		67	* this is conservatice, likely most arches this runs
		68	* on have atomic word read/writes.
		69	*/
		70	#ifndef WORDREAD_UNSAFE
		71	# if __i386 || __x86_64
		72	# define WORDREAD_UNSAFE 0
		73	# else
		74	# define WORDREAD_UNSAFE 1
46	#endif	75	# endif
		76	#endif
		77
		78	/* buffer size for various temporary buffers */
		79	#define AIO_BUFSIZE 65536
		80
		81	#define dBUF \
		82	char *aio_buf; \
		83	LOCK (wrklock); \
		84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		85	UNLOCK (wrklock); \
		86	if (!aio_buf) \
		87	return -1;
47		88
48	enum {	89	enum {
49	REQ_QUIT,	90	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	97	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	98	REQ_LINK, REQ_SYMLINK,
58	REQ_GROUP,	99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
59	};	101	};
60		102
61	#define AIO_REQ_KLASS "IO::AIO::REQ"	103	#define AIO_REQ_KLASS "IO::AIO::REQ"
62	#define AIO_GRP_KLASS "IO::AIO::GRP"	104	#define AIO_GRP_KLASS "IO::AIO::GRP"
63		105
64	typedef struct aio_cb	106	typedef struct aio_cb
65	{	107	{
66	struct aio_cb *grp, *grp_prev, *grp_next;
67
68	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
69
70	SV *self; /* the perl counterpart of this request, if any */
71		109
72	SV *data, *callback;	110	SV *data, *callback;
73	SV *fh, *fh2;	111	SV *fh, *fh2;
74	void *dataptr, *data2ptr;	112	void *dataptr, *data2ptr;
75	Stat_t *statdata;	113	Stat_t *statdata;
76	off_t offset;	114	off_t offset;
77	size_t length;	115	size_t length;
78	ssize_t result;	116	ssize_t result;
79		117
		118	STRLEN dataoffset;
80	int type;	119	int type;
81	int fd, fd2;	120	int fd, fd2;
82	int errorno;	121	int errorno;
83	STRLEN dataoffset;
84	mode_t mode; /* open */	122	mode_t mode; /* open */
		123
85	unsigned char cancelled;	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;
86	} aio_cb;	129	} aio_cb;
		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
87		134
88	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
89	typedef aio_cb *aio_req_ornot;	136	typedef aio_cb *aio_req_ornot;
90	typedef aio_cb *aio_group;
91		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
92	static int started, wanted;	149	static unsigned int started, wanted;
93	static volatile int nreqs;	150
94	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;
95	static int respipe [2];	202	static int respipe [2];
96		203
97	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
98	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
99	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
100		207
101	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
102	static volatile aio_req ress, rese; /* queue start, queue end */	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);
103		297
104	/* must be called at most once */	298	/* must be called at most once */
105	static SV *req_sv (aio_req req, const char *klass)	299	static SV *req_sv (aio_req req, const char *klass)
106	{	300	{
		301	if (!req->self)
		302	{
107	req->self = (SV *)newHV ();	303	req->self = (SV *)newHV ();
108	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		305	}
109		306
110	return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));	307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
111	}	308	}
112		309
113	static aio_req SvAIO_REQ (SV *sv, const char *klass)	310	static aio_req SvAIO_REQ (SV *sv)
114	{	311	{
		312	MAGIC *mg;
		313
115	if (!sv_derived_from (sv, klass) || !SvROK (sv))	314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
116	croak ("object of class %s expected", klass);	315	croak ("object of class " AIO_REQ_KLASS " expected");
117		316
118	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
119		318
120	return mg ? (aio_req)mg->mg_ptr : 0;	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	}
121	}	477	}
122		478
123	static void req_free (aio_req req)	479	static void req_free (aio_req req)
124	{	480	{
125	if (req->self)	481	if (req->self)
126	{	482	{
127	sv_unmagic (req->self, PERL_MAGIC_ext);	483	sv_unmagic (req->self, PERL_MAGIC_ext);
128	SvREFCNT_dec (req->self);	484	SvREFCNT_dec (req->self);
129	}	485	}
130		486
131	if (req->data)
132	SvREFCNT_dec (req->data);	487	SvREFCNT_dec (req->data);
133
134	if (req->fh)
135	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
136
137	if (req->fh2)
138	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
139
140	if (req->statdata)
141	Safefree (req->statdata);
142
143	if (req->callback)
144	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
		491	Safefree (req->statdata);
145		492
146	if (req->type == REQ_READDIR && req->result >= 0)	493	if (req->type == REQ_READDIR)
147	free (req->data2ptr);	494	free (req->data2ptr);
148		495
149	Safefree (req);	496	Safefree (req);
150	}	497	}
151		498
152	static void	499	static void req_cancel_subs (aio_req grp)
153	poll_wait ()
154	{	500	{
155	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;
156	{	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	{
157	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
158	FD_ZERO(&rfd);	653	FD_ZERO(&rfd);
159	FD_SET(respipe [0], &rfd);	654	FD_SET(respipe [0], &rfd);
160		655
161	select (respipe [0] + 1, &rfd, 0, 0, 0);	656	select (respipe [0] + 1, &rfd, 0, 0, 0);
162	}	657	}
163	}	658	}
164		659
165	static int	660	static int poll_cb (int max)
166	poll_cb ()
167	{	661	{
168	dSP;	662	dSP;
169	int count = 0;	663	int count = 0;
170	int do_croak = 0;	664	int do_croak = 0;
171	aio_req req;	665	aio_req req;
172		666
173	for (;;)	667	for (;;)
174	{	668	{
175	pthread_mutex_lock (&reslock);	669	while (max <= 0 || count < max)
176	req = ress;
177
178	if (req)
179	{	670	{
180	ress = req->next;	671	maybe_start_thread ();
181		672
		673	LOCK (reslock);
		674	req = reqq_shift (&res_queue);
		675
182	if (!ress)	676	if (req)
183	{	677	{
		678	--npending;
		679
		680	if (!res_queue.size)
		681	{
184	/* read any signals sent by the worker threads */	682	/* read any signals sent by the worker threads */
185	char buf [32];	683	char buf [32];
186	while (read (respipe [0], buf, 32) == 32)	684	while (read (respipe [0], buf, 32) == 32)
		685	;
187	;	686	}
188
189	rese = 0;
190	}	687	}
191	}
192		688
193	pthread_mutex_unlock (&reslock);	689	UNLOCK (reslock);
194		690
195	if (!req)	691	if (!req)
196	break;	692	break;
197		693
198	nreqs--;	694	--nreqs;
199		695
200	if (req->type == REQ_QUIT)
201	started--;
202	else
203	{
204	int errorno = errno;
205	errno = req->errorno;
206
207	if (req->type == REQ_READ)	696	if (req->type == REQ_GROUP && req->length)
208	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
209
210	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
211	SvREADONLY_off (req->data);
212
213	if (req->statdata)
214	{	697	{
215	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	698	req->fd = 1; /* mark request as delayed */
216	PL_laststatval = req->result;	699	continue;
217	PL_statcache = *(req->statdata);
218	}
219
220	ENTER;
221	PUSHMARK (SP);
222
223	if (req->type == REQ_READDIR)
224	{
225	SV *rv = &PL_sv_undef;
226
227	if (req->result >= 0)
228	{
229	char *buf = req->data2ptr;
230	AV *av = newAV ();
231
232	while (req->result)
233	{
234	SV *sv = newSVpv (buf, 0);
235
236	av_push (av, sv);
237	buf += SvCUR (sv) + 1;
238	req->result--;
239	}
240
241	rv = sv_2mortal (newRV_noinc ((SV *)av));
242	}
243
244	XPUSHs (rv);
245	}	700	}
246	else	701	else
247	{	702	{
248	XPUSHs (sv_2mortal (newSViv (req->result)));
249
250	if (req->type == REQ_OPEN)	703	if (req->type == REQ_READ)
		704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		705
		706	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		707	SvREADONLY_off (req->data);
		708
		709	if (req->statdata)
251	{	710	{
252	/* convert fd to fh */	711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
253	SV *fh;	712	PL_laststatval = req->result;
254		713	PL_statcache = *(req->statdata);
255	PUTBACK;
256	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
257	SPAGAIN;
258
259	fh = SvREFCNT_inc (POPs);
260
261	PUSHMARK (SP);
262	XPUSHs (sv_2mortal (fh));
263	}	714	}
		715
		716	req_invoke (req);
		717
		718	count++;
264	}	719	}
265		720
266	if (SvOK (req->callback) && !req->cancelled)
267	{
268	PUTBACK;
269	call_sv (req->callback, G_VOID | G_EVAL);
270	SPAGAIN;
271
272	if (SvTRUE (ERRSV))
273	{
274	req_free (req);	721	req_free (req);
275	croak (0);
276	}
277	}
278
279	LEAVE;
280
281	errno = errorno;
282	count++;
283	}	722	}
284		723
285	req_free (req);	724	if (nreqs <= max_outstanding)
		725	break;
		726
		727	poll_wait ();
		728
		729	max = 0;
286	}	730	}
287		731
288	return count;	732	return count;
289	}
290
291	static void *aio_proc(void *arg);
292
293	static void
294	start_thread (void)
295	{
296	sigset_t fullsigset, oldsigset;
297	pthread_t tid;
298	pthread_attr_t attr;
299
300	pthread_attr_init (&attr);
301	pthread_attr_setstacksize (&attr, STACKSIZE);
302	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
303
304	sigfillset (&fullsigset);
305	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
306
307	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
308	started++;
309
310	sigprocmask (SIG_SETMASK, &oldsigset, 0);
311	}
312
313	static void
314	req_send (aio_req req)
315	{
316	while (started < wanted && nreqs >= started)
317	start_thread ();
318
319	nreqs++;
320
321	pthread_mutex_lock (&reqlock);
322
323	req->next = 0;
324
325	if (reqe)
326	{
327	reqe->next = req;
328	reqe = req;
329	}
330	else
331	reqe = reqs = req;
332
333	pthread_cond_signal (&reqwait);
334	pthread_mutex_unlock (&reqlock);
335
336	if (nreqs > max_outstanding)
337	for (;;)
338	{
339	poll_cb ();
340
341	if (nreqs <= max_outstanding)
342	break;
343
344	poll_wait ();
345	}
346	}
347
348	static void
349	end_thread (void)
350	{
351	aio_req req;
352	Newz (0, req, 1, aio_cb);
353	req->type = REQ_QUIT;
354
355	req_send (req);
356	}
357
358	static void min_parallel (int nthreads)
359	{
360	if (wanted < nthreads)
361	wanted = nthreads;
362	}
363
364	static void max_parallel (int nthreads)
365	{
366	int cur = started;
367
368	if (wanted > nthreads)
369	wanted = nthreads;
370
371	while (cur > wanted)
372	{
373	end_thread ();
374	cur--;
375	}
376
377	while (started > wanted)
378	{
379	poll_wait ();
380	poll_cb ();
381	}
382	}	733	}
383		734
384	static void create_pipe ()	735	static void create_pipe ()
385	{	736	{
386	if (pipe (respipe))	737	if (pipe (respipe))
…		…
405	* 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,
406	* but that's your problem, not mine.	757	* but that's your problem, not mine.
407	*/	758	*/
408	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
409		760
410	static ssize_t	761	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
411	pread (int fd, void *buf, size_t count, off_t offset)
412	{	762	{
413	ssize_t res;	763	ssize_t res;
414	off_t ooffset;	764	off_t ooffset;
415		765
416	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
417	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
418	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
419	res = read (fd, buf, count);	769	res = read (fd, buf, count);
420	lseek (fd, ooffset, SEEK_SET);	770	lseek (fd, ooffset, SEEK_SET);
421	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
422		772
423	return res;	773	return res;
424	}	774	}
425		775
426	static ssize_t
427	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)
428	{	777	{
429	ssize_t res;	778	ssize_t res;
430	off_t ooffset;	779	off_t ooffset;
431		780
432	pthread_mutex_lock (&preadwritelock);	781	LOCK (preadwritelock);
433	ooffset = lseek (fd, 0, SEEK_CUR);	782	ooffset = lseek (fd, 0, SEEK_CUR);
434	lseek (fd, offset, SEEK_SET);	783	lseek (fd, offset, SEEK_SET);
435	res = write (fd, buf, count);	784	res = write (fd, buf, count);
436	lseek (fd, offset, SEEK_SET);	785	lseek (fd, offset, SEEK_SET);
437	pthread_mutex_unlock (&preadwritelock);	786	UNLOCK (preadwritelock);
438		787
439	return res;	788	return res;
440	}	789	}
441	#endif	790	#endif
442		791
443	#if !HAVE_FDATASYNC	792	#if !HAVE_FDATASYNC
444	# define fdatasync fsync	793	# define fdatasync fsync
445	#endif	794	#endif
446		795
447	#if !HAVE_READAHEAD	796	#if !HAVE_READAHEAD
448	# define readahead aio_readahead	797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
449		798
450	static ssize_t	799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
451	readahead (int fd, off_t offset, size_t count)
452	{	800	{
453	char readahead_buf[4096];	801	dBUF;
454		802
455	while (count > 0)	803	while (count > 0)
456	{	804	{
457	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
458		806
459	pread (fd, readahead_buf, len, offset);	807	pread (fd, aio_buf, len, offset);
460	offset += len;	808	offset += len;
461	count -= len;	809	count -= len;
462	}	810	}
463		811
464	errno = 0;	812	errno = 0;
465	}	813	}
		814
466	#endif	815	#endif
467		816
468	#if !HAVE_READDIR_R	817	#if !HAVE_READDIR_R
469	# define readdir_r aio_readdir_r	818	# define readdir_r aio_readdir_r
470		819
471	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
472		821
473	static int
474	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
475	{	823	{
476	struct dirent *e;	824	struct dirent *e;
477	int errorno;	825	int errorno;
478		826
479	pthread_mutex_lock (&readdirlock);	827	LOCK (readdirlock);
480		828
481	e = readdir (dirp);	829	e = readdir (dirp);
482	errorno = errno;	830	errorno = errno;
483		831
484	if (e)	832	if (e)
…		…
487	strcpy (ent->d_name, e->d_name);	835	strcpy (ent->d_name, e->d_name);
488	}	836	}
489	else	837	else
490	*res = 0;	838	*res = 0;
491		839
492	pthread_mutex_unlock (&readdirlock);	840	UNLOCK (readdirlock);
493		841
494	errno = errorno;	842	errno = errorno;
495	return e ? 0 : -1;	843	return e ? 0 : -1;
496	}	844	}
497	#endif	845	#endif
498		846
499	/* sendfile always needs emulation */	847	/* sendfile always needs emulation */
500	static ssize_t
501	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)
502	{	849	{
503	ssize_t res;	850	ssize_t res;
504		851
505	if (!count)	852	if (!count)
506	return 0;	853	return 0;
…		…
517	{	864	{
518	off_t sbytes;	865	off_t sbytes;
519	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
520		867
521	if (res < 0 && sbytes)	868	if (res < 0 && sbytes)
522	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
523	res = sbytes;	870	res = sbytes;
524	}	871	}
525		872
526	# elif __hpux	873	# elif __hpux
527	res = sendfile (ofd, ifd, offset, count, 0, 0);	874	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
555	#endif	902	#endif
556	)	903	)
557	)	904	)
558	{	905	{
559	/* emulate sendfile. this is a major pain in the ass */	906	/* emulate sendfile. this is a major pain in the ass */
560	char buf[4096];	907	dBUF;
		908
561	res = 0;	909	res = 0;
562		910
563	while (count)	911	while (count)
564	{	912	{
565	ssize_t cnt;	913	ssize_t cnt;
566		914
567	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
568		916
569	if (cnt <= 0)	917	if (cnt <= 0)
570	{	918	{
571	if (cnt && !res) res = -1;	919	if (cnt && !res) res = -1;
572	break;	920	break;
573	}	921	}
574		922
575	cnt = write (ofd, buf, cnt);	923	cnt = write (ofd, aio_buf, cnt);
576		924
577	if (cnt <= 0)	925	if (cnt <= 0)
578	{	926	{
579	if (cnt && !res) res = -1;	927	if (cnt && !res) res = -1;
580	break;	928	break;
…		…
588		936
589	return res;	937	return res;
590	}	938	}
591		939
592	/* read a full directory */	940	/* read a full directory */
593	static int	941	static void scandir_ (aio_req req, worker *self)
594	scandir_ (const char *path, void **namesp)
595	{	942	{
596	DIR *dirp = opendir (path);	943	DIR *dirp;
597	union	944	union
598	{	945	{
599	struct dirent d;	946	struct dirent d;
600	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
601	} u;	948	} *u;
602	struct dirent *entp;	949	struct dirent *entp;
603	char *name, *names;	950	char *name, *names;
604	int memlen = 4096;	951	int memlen = 4096;
605	int memofs = 0;	952	int memofs = 0;
606	int res = 0;	953	int res = 0;
607	int errorno;	954	int errorno;
608		955
609	if (!dirp)	956	LOCK (wrklock);
610	return -1;	957	self->dirp = dirp = opendir (req->dataptr);
611		958	self->dbuf = u = malloc (sizeof (*u));
612	names = malloc (memlen);	959	req->data2ptr = names = malloc (memlen);
		960	UNLOCK (wrklock);
		961
		962	if (dirp && u && names)
		963	for (;;)
		964	{
		965	errno = 0;
		966	readdir_r (dirp, &u->d, &entp);
		967
		968	if (!entp)
		969	break;
		970
		971	name = entp->d_name;
		972
		973	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		974	{
		975	int len = strlen (name) + 1;
		976
		977	res++;
		978
		979	while (memofs + len > memlen)
		980	{
		981	memlen *= 2;
		982	LOCK (wrklock);
		983	req->data2ptr = names = realloc (names, memlen);
		984	UNLOCK (wrklock);
		985
		986	if (!names)
		987	break;
		988	}
		989
		990	memcpy (names + memofs, name, len);
		991	memofs += len;
		992	}
		993	}
		994
		995	if (errno)
		996	res = -1;
		997
		998	req->result = res;
		999	}
		1000
		1001	/*****************************************************************************/
		1002
		1003	static void *aio_proc (void *thr_arg)
		1004	{
		1005	aio_req req;
		1006	worker *self = (worker *)thr_arg;
613		1007
614	for (;;)	1008	for (;;)
615	{	1009	{
616	errno = 0, readdir_r (dirp, &u.d, &entp);	1010	LOCK (reqlock);
617
618	if (!entp)
619	break;
620
621	name = entp->d_name;
622
623	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
624	{
625	int len = strlen (name) + 1;
626
627	res++;
628
629	while (memofs + len > memlen)
630	{
631	memlen *= 2;
632	names = realloc (names, memlen);
633	if (!names)
634	break;
635	}
636
637	memcpy (names + memofs, name, len);
638	memofs += len;
639	}
640	}
641
642	errorno = errno;
643	closedir (dirp);
644
645	if (errorno)
646	{
647	free (names);
648	errno = errorno;
649	res = -1;
650	}
651
652	*namesp = (void *)names;
653	return res;
654	}
655
656	/*****************************************************************************/
657
658	static void *
659	aio_proc (void *thr_arg)
660	{
661	aio_req req;
662	int type;
663
664	do
665	{
666	pthread_mutex_lock (&reqlock);
667		1011
668	for (;;)	1012	for (;;)
669	{	1013	{
670	req = reqs;	1014	self->req = req = reqq_shift (&req_queue);
671
672	if (reqs)
673	{
674	reqs = reqs->next;
675	if (!reqs) reqe = 0;
676	}
677		1015
678	if (req)	1016	if (req)
679	break;	1017	break;
680		1018
681	pthread_cond_wait (&reqwait, &reqlock);	1019	pthread_cond_wait (&reqwait, &reqlock);
682	}	1020	}
683		1021
684	pthread_mutex_unlock (&reqlock);	1022	--nready;
		1023
		1024	UNLOCK (reqlock);
685		1025
686	errno = 0; /* strictly unnecessary */	1026	errno = 0; /* strictly unnecessary */
687		1027
688	if (!req->cancelled)	1028	if (!(req->flags & FLAG_CANCELLED))
689	switch (req->type)	1029	switch (req->type)
690	{	1030	{
691	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;
692	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;
693		1033
694	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;
695	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;
696		1036
697	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
698	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
699	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
700		1040
…		…
706	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
707	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
708		1048
709	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1049	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
710	case REQ_FSYNC: req->result = fsync (req->fd); break;	1050	case REQ_FSYNC: req->result = fsync (req->fd); break;
711	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1051	case REQ_READDIR: scandir_ (req, self); break;
		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;
712		1066
713	case REQ_QUIT:	1067	case REQ_QUIT:
		1068	LOCK (wrklock);
		1069	worker_free (self);
		1070	--started;
		1071	UNLOCK (wrklock);
714	break;	1072	return 0;
715		1073
716	default:	1074	default:
717	req->result = ENOSYS;	1075	req->result = ENOSYS;
718	break;	1076	break;
719	}	1077	}
720		1078
721	req->errorno = errno;	1079	req->errorno = errno;
722		1080
723	pthread_mutex_lock (&reslock);	1081	LOCK (reslock);
724		1082
725	req->next = 0;	1083	++npending;
726		1084
727	if (rese)	1085	if (!reqq_push (&res_queue, req))
728	{
729	rese->next = req;
730	rese = req;
731	}
732	else
733	{
734	rese = ress = req;
735
736	/* write a dummy byte to the pipe so fh becomes ready */	1086	/* write a dummy byte to the pipe so fh becomes ready */
737	write (respipe [1], &respipe, 1);	1087	write (respipe [1], &respipe, 1);
738	}
739		1088
740	pthread_mutex_unlock (&reslock);	1089	self->req = 0;
741	}	1090	worker_clear (self);
742	while (type != REQ_QUIT);
743		1091
744	return 0;	1092	UNLOCK (reslock);
		1093	}
745	}	1094	}
746		1095
747	/*****************************************************************************/	1096	/*****************************************************************************/
748		1097
749	static void atfork_prepare (void)	1098	static void atfork_prepare (void)
750	{	1099	{
751	pthread_mutex_lock (&reqlock);	1100	LOCK (wrklock);
752	pthread_mutex_lock (&reslock);	1101	LOCK (reqlock);
		1102	LOCK (reslock);
753	#if !HAVE_PREADWRITE	1103	#if !HAVE_PREADWRITE
754	pthread_mutex_lock (&preadwritelock);	1104	LOCK (preadwritelock);
755	#endif	1105	#endif
756	#if !HAVE_READDIR_R	1106	#if !HAVE_READDIR_R
757	pthread_mutex_lock (&readdirlock);	1107	LOCK (readdirlock);
758	#endif	1108	#endif
759	}	1109	}
760		1110
761	static void atfork_parent (void)	1111	static void atfork_parent (void)
762	{	1112	{
763	#if !HAVE_READDIR_R	1113	#if !HAVE_READDIR_R
764	pthread_mutex_unlock (&readdirlock);	1114	UNLOCK (readdirlock);
765	#endif	1115	#endif
766	#if !HAVE_PREADWRITE	1116	#if !HAVE_PREADWRITE
767	pthread_mutex_unlock (&preadwritelock);	1117	UNLOCK (preadwritelock);
768	#endif	1118	#endif
769	pthread_mutex_unlock (&reslock);	1119	UNLOCK (reslock);
770	pthread_mutex_unlock (&reqlock);	1120	UNLOCK (reqlock);
		1121	UNLOCK (wrklock);
771	}	1122	}
772		1123
773	static void atfork_child (void)	1124	static void atfork_child (void)
774	{	1125	{
775	aio_req prv;	1126	aio_req prv;
776		1127
		1128	while (prv = reqq_shift (&req_queue))
		1129	req_free (prv);
		1130
		1131	while (prv = reqq_shift (&res_queue))
		1132	req_free (prv);
		1133
		1134	while (wrk_first.next != &wrk_first)
		1135	{
		1136	worker *wrk = wrk_first.next;
		1137
		1138	if (wrk->req)
		1139	req_free (wrk->req);
		1140
		1141	worker_clear (wrk);
		1142	worker_free (wrk);
		1143	}
		1144
777	started = 0;	1145	started = 0;
778		1146	nreqs = 0;
779	while (reqs)
780	{
781	prv = reqs;
782	reqs = prv->next;
783	req_free (prv);
784	}
785
786	reqs = reqe = 0;
787
788	while (ress)
789	{
790	prv = ress;
791	ress = prv->next;
792	req_free (prv);
793	}
794
795	ress = rese = 0;
796		1147
797	close (respipe [0]);	1148	close (respipe [0]);
798	close (respipe [1]);	1149	close (respipe [1]);
799	create_pipe ();	1150	create_pipe ();
800		1151
801	atfork_parent ();	1152	atfork_parent ();
802	}	1153	}
803		1154
804	#define dREQ \	1155	#define dREQ \
805	aio_req req; \	1156	aio_req req; \
		1157	int req_pri = next_pri; \
		1158	next_pri = DEFAULT_PRI + PRI_BIAS; \
806	\	1159	\
807	if (SvOK (callback) && !SvROK (callback)) \	1160	if (SvOK (callback) && !SvROK (callback)) \
808	croak ("callback must be undef or of reference type"); \	1161	croak ("callback must be undef or of reference type"); \
809	\	1162	\
810	Newz (0, req, 1, aio_cb); \	1163	Newz (0, req, 1, aio_cb); \
811	if (!req) \	1164	if (!req) \
812	croak ("out of memory during aio_req allocation"); \	1165	croak ("out of memory during aio_req allocation"); \
813	\	1166	\
814	req->callback = newSVsv (callback)	1167	req->callback = newSVsv (callback); \
		1168	req->pri = req_pri
815		1169
816	#define REQ_SEND \	1170	#define REQ_SEND \
817	req_send (req); \	1171	req_send (req); \
818	\	1172	\
819	if (GIMME_V != G_VOID) \	1173	if (GIMME_V != G_VOID) \
…		…
830	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1184	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
831	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1185	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
832		1186
833	create_pipe ();	1187	create_pipe ();
834	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1188	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
835	}
836		1189
		1190	start_thread ();
		1191	}
		1192
837	void	1193	void
838	min_parallel (nthreads)	1194	min_parallel (int nthreads)
839	int nthreads
840	PROTOTYPE: $	1195	PROTOTYPE: $
841		1196
842	void	1197	void
843	max_parallel (nthreads)	1198	max_parallel (int nthreads)
844	int nthreads
845	PROTOTYPE: $	1199	PROTOTYPE: $
846		1200
847	int	1201	int
848	max_outstanding (nreqs)	1202	max_outstanding (int maxreqs)
849	int nreqs	1203	PROTOTYPE: $
850	PROTOTYPE: $
851	CODE:	1204	CODE:
852	RETVAL = max_outstanding;	1205	RETVAL = max_outstanding;
853	max_outstanding = nreqs;	1206	max_outstanding = maxreqs;
		1207	OUTPUT:
		1208	RETVAL
854		1209
855	void	1210	void
856	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1211	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
857	SV * pathname	1212	SV * pathname
858	int flags	1213	int flags
…		…
1073		1428
1074	REQ_SEND;	1429	REQ_SEND;
1075	}	1430	}
1076		1431
1077	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
1078	aio_group (callback=&PL_sv_undef)	1448	aio_group (callback=&PL_sv_undef)
1079	SV * callback	1449	SV * callback
1080	PROTOTYPE: ;&	1450	PROTOTYPE: ;$
1081	PPCODE:	1451	PPCODE:
1082	{	1452	{
1083	dREQ;	1453	dREQ;
		1454
1084	req->type = REQ_GROUP;	1455	req->type = REQ_GROUP;
		1456	req_send (req);
		1457
1085	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1458	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1086	}	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;
1087		1494
1088	void	1495	void
1089	flush ()	1496	flush ()
1090	PROTOTYPE:	1497	PROTOTYPE:
1091	CODE:	1498	CODE:
1092	while (nreqs)	1499	while (nreqs)
1093	{	1500	{
1094	poll_wait ();	1501	poll_wait ();
1095	poll_cb ();	1502	poll_cb (0);
1096	}	1503	}
1097		1504
1098	void	1505	void
1099	poll()	1506	poll()
1100	PROTOTYPE:	1507	PROTOTYPE:
1101	CODE:	1508	CODE:
1102	if (nreqs)	1509	if (nreqs)
1103	{	1510	{
1104	poll_wait ();	1511	poll_wait ();
1105	poll_cb ();	1512	poll_cb (0);
1106	}	1513	}
1107		1514
1108	int	1515	int
1109	poll_fileno()	1516	poll_fileno()
1110	PROTOTYPE:	1517	PROTOTYPE:
…		…
1115		1522
1116	int	1523	int
1117	poll_cb(...)	1524	poll_cb(...)
1118	PROTOTYPE:	1525	PROTOTYPE:
1119	CODE:	1526	CODE:
1120	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);
1121	OUTPUT:	1536	OUTPUT:
1122	RETVAL	1537	RETVAL
1123		1538
1124	void	1539	void
1125	poll_wait()	1540	poll_wait()
…		…
1134	CODE:	1549	CODE:
1135	RETVAL = nreqs;	1550	RETVAL = nreqs;
1136	OUTPUT:	1551	OUTPUT:
1137	RETVAL	1552	RETVAL
1138		1553
1139	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1554	int
1140		1555	nready()
1141	void
1142	cancel (aio_req_ornot req)
1143	PROTOTYPE:	1556	PROTOTYPE:
1144	CODE:	1557	CODE:
1145	req->cancelled = 1;	1558	RETVAL = get_nready ();
		1559	OUTPUT:
		1560	RETVAL
1146		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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