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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.34 by root, Tue Aug 23 00:03:14 2005 UTC vs.
Revision 1.83 by root, Sat Oct 28 00:17:30 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
7		16
8	#include "autoconf/config.h"	17	#include "autoconf/config.h"
9		18
10	#include <pthread.h>	19	#include <pthread.h>
11		20
		21	#include <stddef.h>
		22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
12	#include <sys/types.h>	25	#include <sys/types.h>
13	#include <sys/stat.h>	26	#include <sys/stat.h>
14		27	#include <limits.h>
15	#include <unistd.h>	28	#include <unistd.h>
16	#include <fcntl.h>	29	#include <fcntl.h>
17	#include <signal.h>	30	#include <signal.h>
18	#include <sched.h>	31	#include <sched.h>
19		32
…		…
23	# elif __freebsd	36	# elif __freebsd
24	# include <sys/socket.h>	37	# include <sys/socket.h>
25	# include <sys/uio.h>	38	# include <sys/uio.h>
26	# elif __hpux	39	# elif __hpux
27	# include <sys/socket.h>	40	# include <sys/socket.h>
		41	# elif __solaris /* not yet */
		42	# include <sys/sendfile.h>
28	# else	43	# else
29	# error sendfile support requested but not available	44	# error sendfile support requested but not available
30	# endif	45	# endif
31	#endif	46	#endif
32		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
33	#if __ia64	58	#if __ia64
34	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
35	#else	62	#else
36	# 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
37	#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;
38		88
39	enum {	89	enum {
40	REQ_QUIT,	90	REQ_QUIT,
41	REQ_OPEN, REQ_CLOSE,	91	REQ_OPEN, REQ_CLOSE,
42	REQ_READ, REQ_WRITE, REQ_READAHEAD,	92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
43	REQ_SENDFILE,	93	REQ_SENDFILE,
44	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
45	REQ_FSYNC, REQ_FDATASYNC,	95	REQ_FSYNC, REQ_FDATASYNC,
46	REQ_UNLINK, REQ_RMDIR,	96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
47	REQ_SYMLINK,	97	REQ_MKNOD, REQ_READDIR,
		98	REQ_LINK, REQ_SYMLINK,
		99	REQ_GROUP, REQ_NOP,
		100	REQ_BUSY,
48	};	101	};
49		102
		103	#define AIO_REQ_KLASS "IO::AIO::REQ"
		104	#define AIO_GRP_KLASS "IO::AIO::GRP"
		105
50	typedef struct aio_cb {	106	typedef struct aio_cb
		107	{
51	struct aio_cb *volatile next;	108	struct aio_cb *volatile next;
52		109
53	int type;	110	SV *data, *callback;
54		111	SV *fh, *fh2;
55	int fd, fd2;	112	void *dataptr, *data2ptr;
		113	Stat_t *statdata;
56	off_t offset;	114	off_t offset;
57	size_t length;	115	size_t length;
58	ssize_t result;	116	ssize_t result;
		117
		118	STRLEN dataoffset;
		119	int type;
		120	int fd, fd2;
		121	int errorno;
59	mode_t mode; /* open */	122	mode_t mode; /* open */
60	int errorno;
61	SV *data, *callback;
62	SV *fh, *fh2;
63	void *dataptr, *data2ptr;
64	STRLEN dataoffset;
65		123
66	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;
67	} aio_cb;	129	} aio_cb;
68		130
		131	enum {
		132	FLAG_CANCELLED = 0x01,
		133	};
		134
69	typedef aio_cb *aio_req;	135	typedef aio_cb *aio_req;
		136	typedef aio_cb *aio_req_ornot;
70		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
71	static int started, wanted;	149	static unsigned int started, wanted;
72	static volatile int nreqs;	150
73	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;
74	static int respipe [2];	202	static int respipe [2];
75		203
76	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
77	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
78	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
79		207
80	static volatile aio_req reqs, reqe; /* queue start, queue end */	208	#if WORDREAD_UNSAFE
81	static volatile aio_req ress, rese; /* queue start, queue end */
82		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
83	static void free_req (aio_req req)	479	static void req_free (aio_req req)
84	{	480	{
85	if (req->data)	481	if (req->self)
		482	{
		483	sv_unmagic (req->self, PERL_MAGIC_ext);
		484	SvREFCNT_dec (req->self);
		485	}
		486
86	SvREFCNT_dec (req->data);	487	SvREFCNT_dec (req->data);
87
88	if (req->fh)
89	SvREFCNT_dec (req->fh);	488	SvREFCNT_dec (req->fh);
90
91	if (req->fh2)
92	SvREFCNT_dec (req->fh2);	489	SvREFCNT_dec (req->fh2);
93
94	if (req->statdata)
95	Safefree (req->statdata);
96
97	if (req->callback)
98	SvREFCNT_dec (req->callback);	490	SvREFCNT_dec (req->callback);
		491	Safefree (req->statdata);
		492
		493	if (req->type == REQ_READDIR)
		494	free (req->data2ptr);
99		495
100	Safefree (req);	496	Safefree (req);
101	}	497	}
102		498
103	static void	499	static void req_cancel_subs (aio_req grp)
104	poll_wait ()
105	{	500	{
106	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;
107	{	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	LOCK (reqlock);
		616	reqq_push (&req_queue, req);
		617	pthread_cond_signal (&reqwait);
		618	UNLOCK (reqlock);
		619
		620	LOCK (wrklock);
		621	--started;
		622	UNLOCK (wrklock);
		623	}
		624
		625	static void min_parallel (int nthreads)
		626	{
		627	if (wanted < nthreads)
		628	wanted = nthreads;
		629	}
		630
		631	static void max_parallel (int nthreads)
		632	{
		633	if (wanted > nthreads)
		634	wanted = nthreads;
		635
		636	while (started > wanted)
		637	end_thread ();
		638	}
		639
		640	static void poll_wait ()
		641	{
108	fd_set rfd;	642	fd_set rfd;
		643
		644	while (nreqs)
		645	{
		646	int size;
		647	if (WORDREAD_UNSAFE) LOCK (reslock);
		648	size = res_queue.size;
		649	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		650
		651	if (size)
		652	return;
		653
		654	maybe_start_thread ();
		655
109	FD_ZERO(&rfd);	656	FD_ZERO(&rfd);
110	FD_SET(respipe [0], &rfd);	657	FD_SET(respipe [0], &rfd);
111		658
112	select (respipe [0] + 1, &rfd, 0, 0, 0);	659	select (respipe [0] + 1, &rfd, 0, 0, 0);
113	}	660	}
114	}	661	}
115		662
116	static int	663	static int poll_cb (int max)
117	poll_cb ()
118	{	664	{
119	dSP;	665	dSP;
120	int count = 0;	666	int count = 0;
121	int do_croak = 0;	667	int do_croak = 0;
122	aio_req req;	668	aio_req req;
123		669
124	for (;;)	670	for (;;)
125	{	671	{
126	pthread_mutex_lock (&reslock);	672	while (max <= 0 || count < max)
127	req = ress;
128
129	if (req)
130	{	673	{
131	ress = req->next;	674	maybe_start_thread ();
132		675
		676	LOCK (reslock);
		677	req = reqq_shift (&res_queue);
		678
133	if (!ress)	679	if (req)
134	{	680	{
135	/* read any signals sent by the worker threads */	681	--npending;
136	char buf [32];
137	while (read (respipe [0], buf, 32) == 32)
138	;
139		682
140	rese = 0;	683	if (!res_queue.size)
141	}
142	}
143
144	pthread_mutex_unlock (&reslock);
145
146	if (!req)
147	break;
148
149	nreqs--;
150
151	if (req->type == REQ_QUIT)
152	started--;
153	else
154	{
155	int errorno = errno;
156	errno = req->errorno;
157
158	if (req->type == REQ_READ)
159	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
160
161	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
162	SvREADONLY_off (req->data);
163
164	if (req->statdata)
165	{
166	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
167	PL_laststatval = req->result;
168	PL_statcache = *(req->statdata);
169	}
170
171	ENTER;
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (newSViv (req->result)));
174
175	if (req->type == REQ_OPEN)
176	{
177	/* convert fd to fh */
178	SV *fh;
179
180	PUTBACK;
181	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
182	SPAGAIN;
183
184	fh = SvREFCNT_inc (POPs);
185
186	PUSHMARK (SP);
187	XPUSHs (sv_2mortal (fh));
188	}
189
190	if (SvOK (req->callback))
191	{
192	PUTBACK;
193	call_sv (req->callback, G_VOID | G_EVAL);
194	SPAGAIN;
195
196	if (SvTRUE (ERRSV))
197	{	684	{
198	free_req (req);	685	/* read any signals sent by the worker threads */
		686	char buf [32];
		687	while (read (respipe [0], buf, 32) == 32)
199	croak (0);	688	;
200	}	689	}
201	}	690	}
202		691
203	LEAVE;	692	UNLOCK (reslock);
204		693
205	errno = errorno;	694	if (!req)
		695	break;
		696
		697	--nreqs;
		698
		699	if (req->type == REQ_GROUP && req->length)
		700	{
		701	req->fd = 1; /* mark request as delayed */
		702	continue;
		703	}
		704	else
		705	{
		706	if (req->type == REQ_READ)
		707	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		708
		709	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		710	SvREADONLY_off (req->data);
		711
		712	if (req->statdata)
		713	{
		714	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		715	PL_laststatval = req->result;
		716	PL_statcache = *(req->statdata);
		717	}
		718
		719	req_invoke (req);
		720
206	count++;	721	count++;
		722	}
		723
		724	req_free (req);
207	}	725	}
208		726
209	free_req (req);	727	if (nreqs <= max_outstanding)
		728	break;
		729
		730	poll_wait ();
		731
		732	max = 0;
210	}	733	}
211		734
212	return count;	735	return count;
213	}
214
215	static void *aio_proc(void *arg);
216
217	static void
218	start_thread (void)
219	{
220	sigset_t fullsigset, oldsigset;
221	pthread_t tid;
222	pthread_attr_t attr;
223
224	pthread_attr_init (&attr);
225	pthread_attr_setstacksize (&attr, STACKSIZE);
226	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
227
228	sigfillset (&fullsigset);
229	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
230
231	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
232	started++;
233
234	sigprocmask (SIG_SETMASK, &oldsigset, 0);
235	}
236
237	static void
238	send_req (aio_req req)
239	{
240	while (started < wanted && nreqs >= started)
241	start_thread ();
242
243	nreqs++;
244
245	pthread_mutex_lock (&reqlock);
246
247	req->next = 0;
248
249	if (reqe)
250	{
251	reqe->next = req;
252	reqe = req;
253	}
254	else
255	reqe = reqs = req;
256
257	pthread_cond_signal (&reqwait);
258	pthread_mutex_unlock (&reqlock);
259
260	if (nreqs > max_outstanding)
261	for (;;)
262	{
263	poll_cb ();
264
265	if (nreqs <= max_outstanding)
266	break;
267
268	poll_wait ();
269	}
270	}
271
272	static void
273	end_thread (void)
274	{
275	aio_req req;
276	Newz (0, req, 1, aio_cb);
277	req->type = REQ_QUIT;
278
279	send_req (req);
280	}
281
282	static void min_parallel (int nthreads)
283	{
284	if (wanted < nthreads)
285	wanted = nthreads;
286	}
287
288	static void max_parallel (int nthreads)
289	{
290	int cur = started;
291
292	if (wanted > nthreads)
293	wanted = nthreads;
294
295	while (cur > wanted)
296	{
297	end_thread ();
298	cur--;
299	}
300
301	while (started > wanted)
302	{
303	poll_wait ();
304	poll_cb ();
305	}
306	}	736	}
307		737
308	static void create_pipe ()	738	static void create_pipe ()
309	{	739	{
310	if (pipe (respipe))	740	if (pipe (respipe))
…		…
313	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	743	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
314	croak ("cannot set result pipe to nonblocking mode");	744	croak ("cannot set result pipe to nonblocking mode");
315		745
316	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	746	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
317	croak ("cannot set result pipe to nonblocking mode");	747	croak ("cannot set result pipe to nonblocking mode");
318	}
319
320	static void atfork_prepare (void)
321	{
322	pthread_mutex_lock (&reqlock);
323	pthread_mutex_lock (&reslock);
324	}
325
326	static void atfork_parent (void)
327	{
328	pthread_mutex_unlock (&reslock);
329	pthread_mutex_unlock (&reqlock);
330	}
331
332	static void atfork_child (void)
333	{
334	aio_req prv;
335
336	started = 0;
337
338	while (reqs)
339	{
340	prv = reqs;
341	reqs = prv->next;
342	free_req (prv);
343	}
344
345	reqs = reqe = 0;
346
347	while (ress)
348	{
349	prv = ress;
350	ress = prv->next;
351	free_req (prv);
352	}
353
354	ress = rese = 0;
355
356	close (respipe [0]);
357	close (respipe [1]);
358	create_pipe ();
359
360	atfork_parent ();
361	}	748	}
362		749
363	/*****************************************************************************/	750	/*****************************************************************************/
364	/* work around various missing functions */	751	/* work around various missing functions */
365		752
…		…
370	/*	757	/*
371	* make our pread/pwrite safe against themselves, but not against	758	* make our pread/pwrite safe against themselves, but not against
372	* normal read/write by using a mutex. slows down execution a lot,	759	* normal read/write by using a mutex. slows down execution a lot,
373	* but that's your problem, not mine.	760	* but that's your problem, not mine.
374	*/	761	*/
375	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	762	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
376		763
377	static ssize_t	764	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
378	pread (int fd, void *buf, size_t count, off_t offset)
379	{	765	{
380	ssize_t res;	766	ssize_t res;
381	off_t ooffset;	767	off_t ooffset;
382		768
383	pthread_mutex_lock (&iolock);	769	LOCK (preadwritelock);
384	ooffset = lseek (fd, 0, SEEK_CUR);	770	ooffset = lseek (fd, 0, SEEK_CUR);
385	lseek (fd, offset, SEEK_SET);	771	lseek (fd, offset, SEEK_SET);
386	res = read (fd, buf, count);	772	res = read (fd, buf, count);
387	lseek (fd, ooffset, SEEK_SET);	773	lseek (fd, ooffset, SEEK_SET);
388	pthread_mutex_unlock (&iolock);	774	UNLOCK (preadwritelock);
389		775
390	return res;	776	return res;
391	}	777	}
392		778
393	static ssize_t
394	pwrite (int fd, void *buf, size_t count, off_t offset)	779	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
395	{	780	{
396	ssize_t res;	781	ssize_t res;
397	off_t ooffset;	782	off_t ooffset;
398		783
399	pthread_mutex_lock (&iolock);	784	LOCK (preadwritelock);
400	ooffset = lseek (fd, 0, SEEK_CUR);	785	ooffset = lseek (fd, 0, SEEK_CUR);
401	lseek (fd, offset, SEEK_SET);	786	lseek (fd, offset, SEEK_SET);
402	res = write (fd, buf, count);	787	res = write (fd, buf, count);
403	lseek (fd, offset, SEEK_SET);	788	lseek (fd, offset, SEEK_SET);
404	pthread_mutex_unlock (&iolock);	789	UNLOCK (preadwritelock);
405		790
406	return res;	791	return res;
407	}	792	}
408	#endif	793	#endif
409		794
410	#if !HAVE_FDATASYNC	795	#if !HAVE_FDATASYNC
411	# define fdatasync fsync	796	# define fdatasync fsync
412	#endif	797	#endif
413		798
414	#if !HAVE_READAHEAD	799	#if !HAVE_READAHEAD
415	# define readahead aio_readahead	800	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
416		801
417	static char readahead_buf[4096];	802	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
418
419	static ssize_t
420	readahead (int fd, off_t offset, size_t count)
421	{	803	{
		804	dBUF;
		805
422	while (count > 0)	806	while (count > 0)
423	{	807	{
424	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	808	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
425		809
426	pread (fd, readahead_buf, len, offset);	810	pread (fd, aio_buf, len, offset);
427	offset += len;	811	offset += len;
428	count -= len;	812	count -= len;
429	}	813	}
430		814
431	errno = 0;	815	errno = 0;
432	}	816	}
		817
		818	#endif
		819
		820	#if !HAVE_READDIR_R
		821	# define readdir_r aio_readdir_r
		822
		823	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		824
		825	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		826	{
		827	struct dirent *e;
		828	int errorno;
		829
		830	LOCK (readdirlock);
		831
		832	e = readdir (dirp);
		833	errorno = errno;
		834
		835	if (e)
		836	{
		837	*res = ent;
		838	strcpy (ent->d_name, e->d_name);
		839	}
		840	else
		841	*res = 0;
		842
		843	UNLOCK (readdirlock);
		844
		845	errno = errorno;
		846	return e ? 0 : -1;
		847	}
433	#endif	848	#endif
434		849
435	/* sendfile always needs emulation */	850	/* sendfile always needs emulation */
436	static ssize_t
437	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	851	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
438	{	852	{
439	ssize_t res;	853	ssize_t res;
440		854
441	if (!count)	855	if (!count)
442	return 0;	856	return 0;
443		857
		858	#if HAVE_SENDFILE
444	#if __linux	859	# if __linux
445	res = sendfile (ofd, ifd, &offset, count);	860	res = sendfile (ofd, ifd, &offset, count);
446		861
447	#elif __freebsd	862	# elif __freebsd
448	/*	863	/*
449	* Of course, the freebsd sendfile is a dire hack with no thoughts	864	* Of course, the freebsd sendfile is a dire hack with no thoughts
450	* wasted on making it similar to other i/o functions.	865	* wasted on making it similar to other I/O functions.
451	*/	866	*/
452	{	867	{
453	off_t sbytes;	868	off_t sbytes;
454	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	869	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
455		870
456	if (!res && errno == EAGAIN)	871	if (res < 0 && sbytes)
457	/* maybe on others, too, as usual, the manpage leaves you guessing */	872	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
458	res = sbytes;	873	res = sbytes;
459	}	874	}
460		875
461	#elif __hpux	876	# elif __hpux
462	res = sendfile (ofd, ifd, offset, count, 0, 0);	877	res = sendfile (ofd, ifd, offset, count, 0, 0);
463		878
		879	# elif __solaris
		880	{
		881	struct sendfilevec vec;
		882	size_t sbytes;
		883
		884	vec.sfv_fd = ifd;
		885	vec.sfv_flag = 0;
		886	vec.sfv_off = offset;
		887	vec.sfv_len = count;
		888
		889	res = sendfilev (ofd, &vec, 1, &sbytes);
		890
		891	if (res < 0 && sbytes)
		892	res = sbytes;
		893	}
		894
		895	# endif
464	#else	896	#else
465	res = -1;	897	res = -1;
466	errno = ENOSYS;	898	errno = ENOSYS;
467	#endif	899	#endif
468		900
		901	if (res < 0
469	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))	902	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		903	#if __solaris
		904	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		905	#endif
		906	)
		907	)
470	{	908	{
471	/* emulate sendfile. this is a major pain in the ass */	909	/* emulate sendfile. this is a major pain in the ass */
472	char *buf = malloc (4096);	910	dBUF;
		911
473	res = 0;	912	res = 0;
474		913
475	for (;;)	914	while (count)
476	{	915	{
477	ssize_t cnt;	916	ssize_t cnt;
478		917
479	cnt = pread (ifd, buf, 4096, offset);	918	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
480		919
481	if (cnt <= 0)	920	if (cnt <= 0)
482	{	921	{
483	if (cnt && !res) res = -1;	922	if (cnt && !res) res = -1;
484	break;	923	break;
485	}	924	}
486		925
487	cnt = write (ofd, buf, cnt);	926	cnt = write (ofd, aio_buf, cnt);
488		927
489	if (cnt <= 0)	928	if (cnt <= 0)
490	{	929	{
491	if (cnt && !res) res = -1;	930	if (cnt && !res) res = -1;
492	break;	931	break;
493	}	932	}
494		933
495	offset += cnt;	934	offset += cnt;
496	res += cnt;	935	res += cnt;
		936	count -= cnt;
497	}	937	}
498
499	{
500	int errorno = errno;
501	free (buf);
502	errno = errorno;
503	}
504	}	938	}
505		939
506	return res;	940	return res;
		941	}
		942
		943	/* read a full directory */
		944	static void scandir_ (aio_req req, worker *self)
		945	{
		946	DIR *dirp;
		947	union
		948	{
		949	struct dirent d;
		950	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		951	} *u;
		952	struct dirent *entp;
		953	char *name, *names;
		954	int memlen = 4096;
		955	int memofs = 0;
		956	int res = 0;
		957	int errorno;
		958
		959	LOCK (wrklock);
		960	self->dirp = dirp = opendir (req->dataptr);
		961	self->dbuf = u = malloc (sizeof (*u));
		962	req->data2ptr = names = malloc (memlen);
		963	UNLOCK (wrklock);
		964
		965	if (dirp && u && names)
		966	for (;;)
		967	{
		968	errno = 0;
		969	readdir_r (dirp, &u->d, &entp);
		970
		971	if (!entp)
		972	break;
		973
		974	name = entp->d_name;
		975
		976	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		977	{
		978	int len = strlen (name) + 1;
		979
		980	res++;
		981
		982	while (memofs + len > memlen)
		983	{
		984	memlen *= 2;
		985	LOCK (wrklock);
		986	req->data2ptr = names = realloc (names, memlen);
		987	UNLOCK (wrklock);
		988
		989	if (!names)
		990	break;
		991	}
		992
		993	memcpy (names + memofs, name, len);
		994	memofs += len;
		995	}
		996	}
		997
		998	if (errno)
		999	res = -1;
		1000
		1001	req->result = res;
507	}	1002	}
508		1003
509	/*****************************************************************************/	1004	/*****************************************************************************/
510		1005
511	static void *
512	aio_proc (void *thr_arg)	1006	static void *aio_proc (void *thr_arg)
513	{	1007	{
514	aio_req req;	1008	aio_req req;
515	int type;	1009	worker *self = (worker *)thr_arg;
516		1010
517	do	1011	for (;;)
518	{	1012	{
519	pthread_mutex_lock (&reqlock);	1013	LOCK (reqlock);
520		1014
521	for (;;)	1015	for (;;)
522	{	1016	{
523	req = reqs;	1017	self->req = req = reqq_shift (&req_queue);
524
525	if (reqs)
526	{
527	reqs = reqs->next;
528	if (!reqs) reqe = 0;
529	}
530		1018
531	if (req)	1019	if (req)
532	break;	1020	break;
533		1021
534	pthread_cond_wait (&reqwait, &reqlock);	1022	pthread_cond_wait (&reqwait, &reqlock);
535	}	1023	}
536		1024
537	pthread_mutex_unlock (&reqlock);	1025	--nready;
		1026
		1027	UNLOCK (reqlock);
538		1028
539	errno = 0; /* strictly unnecessary */	1029	errno = 0; /* strictly unnecessary */
540		1030
541	type = req->type;	1031	if (!(req->flags & FLAG_CANCELLED))
542
543	switch (type)	1032	switch (req->type)
544	{	1033	{
545	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1034	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
546	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1035	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
547		1036
548	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1037	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
549	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1038	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
550		1039
551	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1040	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
552	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1041	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
553	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1042	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
554		1043
555	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1044	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
556	case REQ_CLOSE: req->result = close (req->fd); break;	1045	case REQ_CLOSE: req->result = close (req->fd); break;
557	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1046	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
558	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1047	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		1048	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		1049	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
559	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1050	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1051	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
560		1052
561	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1053	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
562	case REQ_FSYNC: req->result = fsync (req->fd); break;	1054	case REQ_FSYNC: req->result = fsync (req->fd); break;
		1055	case REQ_READDIR: scandir_ (req, self); break;
563		1056
		1057	case REQ_BUSY:
		1058	{
		1059	struct timeval tv;
		1060
		1061	tv.tv_sec = req->fd;
		1062	tv.tv_usec = req->fd2;
		1063
		1064	req->result = select (0, 0, 0, 0, &tv);
		1065	}
		1066
		1067	case REQ_GROUP:
		1068	case REQ_NOP:
		1069	break;
		1070
564	case REQ_QUIT:	1071	case REQ_QUIT:
565	break;	1072	LOCK (wrklock);
		1073	worker_free (self);
		1074	--started;
		1075	UNLOCK (wrklock);
		1076	return 0;
566		1077
567	default:	1078	default:
568	req->result = ENOSYS;	1079	req->result = ENOSYS;
569	break;	1080	break;
570	}	1081	}
571		1082
572	req->errorno = errno;	1083	req->errorno = errno;
573		1084
574	pthread_mutex_lock (&reslock);	1085	LOCK (reslock);
575		1086
576	req->next = 0;	1087	++npending;
577		1088
578	if (rese)	1089	if (!reqq_push (&res_queue, req))
579	{
580	rese->next = req;
581	rese = req;
582	}
583	else
584	{
585	rese = ress = req;
586
587	/* write a dummy byte to the pipe so fh becomes ready */	1090	/* write a dummy byte to the pipe so fh becomes ready */
588	write (respipe [1], &respipe, 1);	1091	write (respipe [1], &respipe, 1);
589	}
590		1092
591	pthread_mutex_unlock (&reslock);	1093	self->req = 0;
		1094	worker_clear (self);
		1095
		1096	UNLOCK (reslock);
		1097	}
		1098	}
		1099
		1100	/*****************************************************************************/
		1101
		1102	static void atfork_prepare (void)
		1103	{
		1104	LOCK (wrklock);
		1105	LOCK (reqlock);
		1106	LOCK (reslock);
		1107	#if !HAVE_PREADWRITE
		1108	LOCK (preadwritelock);
		1109	#endif
		1110	#if !HAVE_READDIR_R
		1111	LOCK (readdirlock);
		1112	#endif
		1113	}
		1114
		1115	static void atfork_parent (void)
		1116	{
		1117	#if !HAVE_READDIR_R
		1118	UNLOCK (readdirlock);
		1119	#endif
		1120	#if !HAVE_PREADWRITE
		1121	UNLOCK (preadwritelock);
		1122	#endif
		1123	UNLOCK (reslock);
		1124	UNLOCK (reqlock);
		1125	UNLOCK (wrklock);
		1126	}
		1127
		1128	static void atfork_child (void)
		1129	{
		1130	aio_req prv;
		1131
		1132	while (prv = reqq_shift (&req_queue))
		1133	req_free (prv);
		1134
		1135	while (prv = reqq_shift (&res_queue))
		1136	req_free (prv);
		1137
		1138	while (wrk_first.next != &wrk_first)
592	}	1139	{
593	while (type != REQ_QUIT);	1140	worker *wrk = wrk_first.next;
594		1141
595	return 0;	1142	if (wrk->req)
		1143	req_free (wrk->req);
		1144
		1145	worker_clear (wrk);
		1146	worker_free (wrk);
		1147	}
		1148
		1149	started = 0;
		1150	nreqs = 0;
		1151
		1152	close (respipe [0]);
		1153	close (respipe [1]);
		1154	create_pipe ();
		1155
		1156	atfork_parent ();
596	}	1157	}
597		1158
598	#define dREQ \	1159	#define dREQ \
599	aio_req req; \	1160	aio_req req; \
		1161	int req_pri = next_pri; \
		1162	next_pri = DEFAULT_PRI + PRI_BIAS; \
600	\	1163	\
601	if (SvOK (callback) && !SvROK (callback)) \	1164	if (SvOK (callback) && !SvROK (callback)) \
602	croak ("clalback must be undef or of reference type"); \	1165	croak ("callback must be undef or of reference type"); \
603	\	1166	\
604	Newz (0, req, 1, aio_cb); \	1167	Newz (0, req, 1, aio_cb); \
605	if (!req) \	1168	if (!req) \
606	croak ("out of memory during aio_req allocation"); \	1169	croak ("out of memory during aio_req allocation"); \
607	\	1170	\
608	req->callback = newSVsv (callback);	1171	req->callback = newSVsv (callback); \
		1172	req->pri = req_pri
		1173
		1174	#define REQ_SEND \
		1175	req_send (req); \
		1176	\
		1177	if (GIMME_V != G_VOID) \
		1178	XPUSHs (req_sv (req, AIO_REQ_KLASS));
609		1179
610	MODULE = IO::AIO PACKAGE = IO::AIO	1180	MODULE = IO::AIO PACKAGE = IO::AIO
611		1181
612	PROTOTYPES: ENABLE	1182	PROTOTYPES: ENABLE
613		1183
614	BOOT:	1184	BOOT:
615	{	1185	{
		1186	HV *stash = gv_stashpv ("IO::AIO", 1);
		1187
		1188	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1189	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1190	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1191	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1192	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1193	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1194
616	create_pipe ();	1195	create_pipe ();
617	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1196	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
618	}
619		1197
		1198	start_thread ();
		1199	}
		1200
620	void	1201	void
621	min_parallel(nthreads)	1202	min_parallel (int nthreads)
622	int nthreads
623	PROTOTYPE: $	1203	PROTOTYPE: $
624		1204
625	void	1205	void
626	max_parallel(nthreads)	1206	max_parallel (int nthreads)
627	int nthreads
628	PROTOTYPE: $	1207	PROTOTYPE: $
629		1208
630	int	1209	int
631	max_outstanding(nreqs)	1210	max_outstanding (int maxreqs)
632	int nreqs	1211	PROTOTYPE: $
633	PROTOTYPE: $
634	CODE:	1212	CODE:
635	RETVAL = max_outstanding;	1213	RETVAL = max_outstanding;
636	max_outstanding = nreqs;	1214	max_outstanding = maxreqs;
		1215	OUTPUT:
		1216	RETVAL
637		1217
638	void	1218	void
639	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1219	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
640	SV * pathname	1220	SV * pathname
641	int flags	1221	int flags
642	int mode	1222	int mode
643	SV * callback	1223	SV * callback
644	PROTOTYPE: $$$;$	1224	PROTOTYPE: $$$;$
645	CODE:	1225	PPCODE:
646	{	1226	{
647	dREQ;	1227	dREQ;
648		1228
649	req->type = REQ_OPEN;	1229	req->type = REQ_OPEN;
650	req->data = newSVsv (pathname);	1230	req->data = newSVsv (pathname);
651	req->dataptr = SvPVbyte_nolen (req->data);	1231	req->dataptr = SvPVbyte_nolen (req->data);
652	req->fd = flags;	1232	req->fd = flags;
653	req->mode = mode;	1233	req->mode = mode;
654		1234
655	send_req (req);	1235	REQ_SEND;
656	}	1236	}
657		1237
658	void	1238	void
659	aio_close(fh,callback=&PL_sv_undef)	1239	aio_close (fh,callback=&PL_sv_undef)
660	SV * fh	1240	SV * fh
661	SV * callback	1241	SV * callback
662	PROTOTYPE: $;$	1242	PROTOTYPE: $;$
663	ALIAS:	1243	ALIAS:
664	aio_close = REQ_CLOSE	1244	aio_close = REQ_CLOSE
665	aio_fsync = REQ_FSYNC	1245	aio_fsync = REQ_FSYNC
666	aio_fdatasync = REQ_FDATASYNC	1246	aio_fdatasync = REQ_FDATASYNC
667	CODE:	1247	PPCODE:
668	{	1248	{
669	dREQ;	1249	dREQ;
670		1250
671	req->type = ix;	1251	req->type = ix;
672	req->fh = newSVsv (fh);	1252	req->fh = newSVsv (fh);
673	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1253	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
674		1254
675	send_req (req);	1255	REQ_SEND (req);
676	}	1256	}
677		1257
678	void	1258	void
679	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1259	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
680	SV * fh	1260	SV * fh
681	UV offset	1261	UV offset
682	UV length	1262	UV length
683	SV * data	1263	SV * data
684	UV dataoffset	1264	UV dataoffset
685	SV * callback	1265	SV * callback
686	ALIAS:	1266	ALIAS:
687	aio_read = REQ_READ	1267	aio_read = REQ_READ
688	aio_write = REQ_WRITE	1268	aio_write = REQ_WRITE
689	PROTOTYPE: $$$$$;$	1269	PROTOTYPE: $$$$$;$
690	CODE:	1270	PPCODE:
691	{	1271	{
692	aio_req req;	1272	aio_req req;
693	STRLEN svlen;	1273	STRLEN svlen;
694	char *svptr = SvPVbyte (data, svlen);	1274	char *svptr = SvPVbyte (data, svlen);
695		1275
…		…
733	{	1313	{
734	SvREADONLY_on (data);	1314	SvREADONLY_on (data);
735	req->data2ptr = (void *)data;	1315	req->data2ptr = (void *)data;
736	}	1316	}
737		1317
738	send_req (req);	1318	REQ_SEND;
739	}	1319	}
740	}	1320	}
741		1321
742	void	1322	void
743	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1323	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
744	SV * out_fh	1324	SV * out_fh
745	SV * in_fh	1325	SV * in_fh
746	UV in_offset	1326	UV in_offset
747	UV length	1327	UV length
748	SV * callback	1328	SV * callback
749	PROTOTYPE: $$$$;$	1329	PROTOTYPE: $$$$;$
750	CODE:	1330	PPCODE:
751	{	1331	{
752	dREQ;	1332	dREQ;
753		1333
754	req->type = REQ_SENDFILE;	1334	req->type = REQ_SENDFILE;
755	req->fh = newSVsv (out_fh);	1335	req->fh = newSVsv (out_fh);
…		…
757	req->fh2 = newSVsv (in_fh);	1337	req->fh2 = newSVsv (in_fh);
758	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1338	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
759	req->offset = in_offset;	1339	req->offset = in_offset;
760	req->length = length;	1340	req->length = length;
761		1341
762	send_req (req);	1342	REQ_SEND;
763	}	1343	}
764		1344
765	void	1345	void
766	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1346	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
767	SV * fh	1347	SV * fh
768	UV offset	1348	UV offset
769	IV length	1349	IV length
770	SV * callback	1350	SV * callback
771	PROTOTYPE: $$$;$	1351	PROTOTYPE: $$$;$
772	CODE:	1352	PPCODE:
773	{	1353	{
774	dREQ;	1354	dREQ;
775		1355
776	req->type = REQ_READAHEAD;	1356	req->type = REQ_READAHEAD;
777	req->fh = newSVsv (fh);	1357	req->fh = newSVsv (fh);
778	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1358	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
779	req->offset = offset;	1359	req->offset = offset;
780	req->length = length;	1360	req->length = length;
781		1361
782	send_req (req);	1362	REQ_SEND;
783	}	1363	}
784		1364
785	void	1365	void
786	aio_stat(fh_or_path,callback=&PL_sv_undef)	1366	aio_stat (fh_or_path,callback=&PL_sv_undef)
787	SV * fh_or_path	1367	SV * fh_or_path
788	SV * callback	1368	SV * callback
789	ALIAS:	1369	ALIAS:
790	aio_stat = REQ_STAT	1370	aio_stat = REQ_STAT
791	aio_lstat = REQ_LSTAT	1371	aio_lstat = REQ_LSTAT
792	CODE:	1372	PPCODE:
793	{	1373	{
794	dREQ;	1374	dREQ;
795		1375
796	New (0, req->statdata, 1, Stat_t);	1376	New (0, req->statdata, 1, Stat_t);
797	if (!req->statdata)	1377	if (!req->statdata)
798	{	1378	{
799	free_req (req);	1379	req_free (req);
800	croak ("out of memory during aio_req->statdata allocation");	1380	croak ("out of memory during aio_req->statdata allocation");
801	}	1381	}
802		1382
803	if (SvPOK (fh_or_path))	1383	if (SvPOK (fh_or_path))
804	{	1384	{
…		…
811	req->type = REQ_FSTAT;	1391	req->type = REQ_FSTAT;
812	req->fh = newSVsv (fh_or_path);	1392	req->fh = newSVsv (fh_or_path);
813	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1393	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
814	}	1394	}
815		1395
816	send_req (req);	1396	REQ_SEND;
817	}	1397	}
818		1398
819	void	1399	void
820	aio_unlink(pathname,callback=&PL_sv_undef)	1400	aio_unlink (pathname,callback=&PL_sv_undef)
821	SV * pathname	1401	SV * pathname
822	SV * callback	1402	SV * callback
823	ALIAS:	1403	ALIAS:
824	aio_unlink = REQ_UNLINK	1404	aio_unlink = REQ_UNLINK
825	aio_rmdir = REQ_RMDIR	1405	aio_rmdir = REQ_RMDIR
		1406	aio_readdir = REQ_READDIR
826	CODE:	1407	PPCODE:
827	{	1408	{
828	dREQ;	1409	dREQ;
829		1410
830	req->type = ix;	1411	req->type = ix;
831	req->data = newSVsv (pathname);	1412	req->data = newSVsv (pathname);
832	req->dataptr = SvPVbyte_nolen (req->data);	1413	req->dataptr = SvPVbyte_nolen (req->data);
833		1414
834	send_req (req);	1415	REQ_SEND;
835	}	1416	}
836		1417
837	void	1418	void
838	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1419	aio_link (oldpath,newpath,callback=&PL_sv_undef)
839	SV * oldpath	1420	SV * oldpath
840	SV * newpath	1421	SV * newpath
841	SV * callback	1422	SV * callback
		1423	ALIAS:
		1424	aio_link = REQ_LINK
		1425	aio_symlink = REQ_SYMLINK
		1426	aio_rename = REQ_RENAME
842	CODE:	1427	PPCODE:
843	{	1428	{
844	dREQ;	1429	dREQ;
845		1430
846	req->type = REQ_SYMLINK;	1431	req->type = ix;
847	req->fh = newSVsv (oldpath);	1432	req->fh = newSVsv (oldpath);
848	req->data2ptr = SvPVbyte_nolen (req->fh);	1433	req->data2ptr = SvPVbyte_nolen (req->fh);
849	req->data = newSVsv (newpath);	1434	req->data = newSVsv (newpath);
850	req->dataptr = SvPVbyte_nolen (req->data);	1435	req->dataptr = SvPVbyte_nolen (req->data);
851		1436
852	send_req (req);	1437	REQ_SEND;
853	}	1438	}
854		1439
855	void	1440	void
		1441	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1442	SV * pathname
		1443	SV * callback
		1444	UV mode
		1445	UV dev
		1446	PPCODE:
		1447	{
		1448	dREQ;
		1449
		1450	req->type = REQ_MKNOD;
		1451	req->data = newSVsv (pathname);
		1452	req->dataptr = SvPVbyte_nolen (req->data);
		1453	req->mode = (mode_t)mode;
		1454	req->offset = dev;
		1455
		1456	REQ_SEND;
		1457	}
		1458
		1459	void
		1460	aio_busy (delay,callback=&PL_sv_undef)
		1461	double delay
		1462	SV * callback
		1463	PPCODE:
		1464	{
		1465	dREQ;
		1466
		1467	req->type = REQ_BUSY;
		1468	req->fd = delay < 0. ? 0 : delay;
		1469	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1470
		1471	REQ_SEND;
		1472	}
		1473
		1474	void
		1475	aio_group (callback=&PL_sv_undef)
		1476	SV * callback
		1477	PROTOTYPE: ;$
		1478	PPCODE:
		1479	{
		1480	dREQ;
		1481
		1482	req->type = REQ_GROUP;
		1483	req_send (req);
		1484
		1485	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1486	}
		1487
		1488	void
		1489	aio_nop (callback=&PL_sv_undef)
		1490	SV * callback
		1491	PPCODE:
		1492	{
		1493	dREQ;
		1494
		1495	req->type = REQ_NOP;
		1496
		1497	REQ_SEND;
		1498	}
		1499
		1500	int
		1501	aioreq_pri (int pri = 0)
		1502	PROTOTYPE: ;$
		1503	CODE:
		1504	RETVAL = next_pri - PRI_BIAS;
		1505	if (items > 0)
		1506	{
		1507	if (pri < PRI_MIN) pri = PRI_MIN;
		1508	if (pri > PRI_MAX) pri = PRI_MAX;
		1509	next_pri = pri + PRI_BIAS;
		1510	}
		1511	OUTPUT:
		1512	RETVAL
		1513
		1514	void
		1515	aioreq_nice (int nice = 0)
		1516	CODE:
		1517	nice = next_pri - nice;
		1518	if (nice < PRI_MIN) nice = PRI_MIN;
		1519	if (nice > PRI_MAX) nice = PRI_MAX;
		1520	next_pri = nice + PRI_BIAS;
		1521
		1522	void
856	flush()	1523	flush ()
857	PROTOTYPE:	1524	PROTOTYPE:
858	CODE:	1525	CODE:
859	while (nreqs)	1526	while (nreqs)
860	{	1527	{
861	poll_wait ();	1528	poll_wait ();
862	poll_cb ();	1529	poll_cb (0);
863	}	1530	}
864		1531
865	void	1532	void
866	poll()	1533	poll()
867	PROTOTYPE:	1534	PROTOTYPE:
868	CODE:	1535	CODE:
869	if (nreqs)	1536	if (nreqs)
870	{	1537	{
871	poll_wait ();	1538	poll_wait ();
872	poll_cb ();	1539	poll_cb (0);
873	}	1540	}
874		1541
875	int	1542	int
876	poll_fileno()	1543	poll_fileno()
877	PROTOTYPE:	1544	PROTOTYPE:
…		…
882		1549
883	int	1550	int
884	poll_cb(...)	1551	poll_cb(...)
885	PROTOTYPE:	1552	PROTOTYPE:
886	CODE:	1553	CODE:
887	RETVAL = poll_cb ();	1554	RETVAL = poll_cb (0);
		1555	OUTPUT:
		1556	RETVAL
		1557
		1558	int
		1559	poll_some(int max = 0)
		1560	PROTOTYPE: $
		1561	CODE:
		1562	RETVAL = poll_cb (max);
888	OUTPUT:	1563	OUTPUT:
889	RETVAL	1564	RETVAL
890		1565
891	void	1566	void
892	poll_wait()	1567	poll_wait()
…		…
901	CODE:	1576	CODE:
902	RETVAL = nreqs;	1577	RETVAL = nreqs;
903	OUTPUT:	1578	OUTPUT:
904	RETVAL	1579	RETVAL
905		1580
		1581	int
		1582	nready()
		1583	PROTOTYPE:
		1584	CODE:
		1585	RETVAL = get_nready ();
		1586	OUTPUT:
		1587	RETVAL
		1588
		1589	int
		1590	npending()
		1591	PROTOTYPE:
		1592	CODE:
		1593	RETVAL = get_npending ();
		1594	OUTPUT:
		1595	RETVAL
		1596
		1597	PROTOTYPES: DISABLE
		1598
		1599	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1600
		1601	void
		1602	cancel (aio_req_ornot req)
		1603	CODE:
		1604	req_cancel (req);
		1605
		1606	void
		1607	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1608	CODE:
		1609	SvREFCNT_dec (req->callback);
		1610	req->callback = newSVsv (callback);
		1611
		1612	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1613
		1614	void
		1615	add (aio_req grp, ...)
		1616	PPCODE:
		1617	{
		1618	int i;
		1619	aio_req req;
		1620
		1621	if (grp->fd == 2)
		1622	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1623
		1624	for (i = 1; i < items; ++i )
		1625	{
		1626	if (GIMME_V != G_VOID)
		1627	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1628
		1629	req = SvAIO_REQ (ST (i));
		1630
		1631	if (req)
		1632	{
		1633	++grp->length;
		1634	req->grp = grp;
		1635
		1636	req->grp_prev = 0;
		1637	req->grp_next = grp->grp_first;
		1638
		1639	if (grp->grp_first)
		1640	grp->grp_first->grp_prev = req;
		1641
		1642	grp->grp_first = req;
		1643	}
		1644	}
		1645	}
		1646
		1647	void
		1648	cancel_subs (aio_req_ornot req)
		1649	CODE:
		1650	req_cancel_subs (req);
		1651
		1652	void
		1653	result (aio_req grp, ...)
		1654	CODE:
		1655	{
		1656	int i;
		1657	AV *av;
		1658
		1659	grp->errorno = errno;
		1660
		1661	av = newAV ();
		1662
		1663	for (i = 1; i < items; ++i )
		1664	av_push (av, newSVsv (ST (i)));
		1665
		1666	SvREFCNT_dec (grp->data);
		1667	grp->data = (SV *)av;
		1668	}
		1669
		1670	void
		1671	errno (aio_req grp, int errorno = errno)
		1672	CODE:
		1673	grp->errorno = errorno;
		1674
		1675	void
		1676	limit (aio_req grp, int limit)
		1677	CODE:
		1678	grp->fd2 = limit;
		1679	aio_grp_feed (grp);
		1680
		1681	void
		1682	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1683	CODE:
		1684	{
		1685	SvREFCNT_dec (grp->fh2);
		1686	grp->fh2 = newSVsv (callback);
		1687
		1688	if (grp->fd2 <= 0)
		1689	grp->fd2 = 2;
		1690
		1691	aio_grp_feed (grp);
		1692	}
		1693

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