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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.42 by root, Fri Jul 21 07:35:31 2006 UTC vs.
Revision 1.84 by root, Sat Oct 28 01:24:19 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>
…		…
32	# else	43	# else
33	# error sendfile support requested but not available	44	# error sendfile support requested but not available
34	# endif	45	# endif
35	#endif	46	#endif
36		47
		48	/* number of seconds after which idle threads exit */
		49	#define IDLE_TIMEOUT 10
		50
37	/* used for struct dirent, AIX doesn't provide it */	51	/* used for struct dirent, AIX doesn't provide it */
38	#ifndef NAME_MAX	52	#ifndef NAME_MAX
39	# define NAME_MAX 4096	53	# define NAME_MAX 4096
40	#endif	54	#endif
41		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
		59	#endif
		60
42	#if __ia64	61	#if __ia64
43	# define STACKSIZE 65536	62	# define STACKSIZE 65536
		63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		64	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	65	#else
45	# define STACKSIZE 8192	66	# define STACKSIZE 16384
		67	#endif
		68
		69	/* wether word reads are potentially non-atomic.
		70	* this is conservatice, likely most arches this runs
		71	* on have atomic word read/writes.
		72	*/
		73	#ifndef WORDREAD_UNSAFE
		74	# if __i386 || __x86_64
		75	# define WORDREAD_UNSAFE 0
		76	# else
		77	# define WORDREAD_UNSAFE 1
46	#endif	78	# endif
		79	#endif
		80
		81	/* buffer size for various temporary buffers */
		82	#define AIO_BUFSIZE 65536
		83
		84	#define dBUF \
		85	char *aio_buf; \
		86	LOCK (wrklock); \
		87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		88	UNLOCK (wrklock); \
		89	if (!aio_buf) \
		90	return -1;
47		91
48	enum {	92	enum {
49	REQ_QUIT,	93	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
52	REQ_SENDFILE,	96	REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	100	REQ_MKNOD, REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	101	REQ_LINK, REQ_SYMLINK,
		102	REQ_GROUP, REQ_NOP,
		103	REQ_BUSY,
58	};	104	};
59		105
		106	#define AIO_REQ_KLASS "IO::AIO::REQ"
		107	#define AIO_GRP_KLASS "IO::AIO::GRP"
		108
60	typedef struct aio_cb {	109	typedef struct aio_cb
		110	{
61	struct aio_cb *volatile next;	111	struct aio_cb *volatile next;
62		112
63	int type;	113	SV *data, *callback;
64		114	SV *fh, *fh2;
65	/* should receive a cleanup, with unions */	115	void *dataptr, *data2ptr;
66	int fd, fd2;	116	Stat_t *statdata;
67	off_t offset;	117	off_t offset;
68	size_t length;	118	size_t length;
69	ssize_t result;	119	ssize_t result;
		120
		121	STRLEN dataoffset;
		122	int type;
		123	int fd, fd2;
		124	int errorno;
70	mode_t mode; /* open */	125	mode_t mode; /* open */
71	int errorno;
72	SV *data, *callback;
73	SV *fh, *fh2;
74	void *dataptr, *data2ptr;
75	STRLEN dataoffset;
76		126
77	Stat_t *statdata;	127	unsigned char flags;
		128	unsigned char pri;
		129
		130	SV *self; /* the perl counterpart of this request, if any */
		131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
78	} aio_cb;	132	} aio_cb;
79		133
		134	enum {
		135	FLAG_CANCELLED = 0x01,
		136	};
		137
80	typedef aio_cb *aio_req;	138	typedef aio_cb *aio_req;
		139	typedef aio_cb *aio_req_ornot;
81		140
		141	enum {
		142	PRI_MIN = -4,
		143	PRI_MAX = 4,
		144
		145	DEFAULT_PRI = 0,
		146	PRI_BIAS = -PRI_MIN,
		147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		148	};
		149
		150	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		151
82	static int started, wanted;	152	static unsigned int started, idle, wanted;
83	static volatile int nreqs;	153
84	static int max_outstanding = 1<<30;	154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		156	#else
		157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		158	#endif
		159
		160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		162
		163	/* worker threads management */
		164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		165
		166	typedef struct worker {
		167	/* locked by wrklock */
		168	struct worker *prev, *next;
		169
		170	pthread_t tid;
		171
		172	/* locked by reslock, reqlock or wrklock */
		173	aio_req req; /* currently processed request */
		174	void *dbuf;
		175	DIR *dirp;
		176	} worker;
		177
		178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		179
		180	static void worker_clear (worker *wrk)
		181	{
		182	if (wrk->dirp)
		183	{
		184	closedir (wrk->dirp);
		185	wrk->dirp = 0;
		186	}
		187
		188	if (wrk->dbuf)
		189	{
		190	free (wrk->dbuf);
		191	wrk->dbuf = 0;
		192	}
		193	}
		194
		195	static void worker_free (worker *wrk)
		196	{
		197	wrk->next->prev = wrk->prev;
		198	wrk->prev->next = wrk->next;
		199
		200	free (wrk);
		201	}
		202
		203	static volatile unsigned int nreqs, nready, npending;
		204	static volatile unsigned int max_idle = 4;
		205	static volatile unsigned int max_outstanding = 0xffffffff;
85	static int respipe [2];	206	static int respipe [2];
86		207
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	208	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	209	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	210	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90		211
91	static volatile aio_req reqs, reqe; /* queue start, queue end */	212	#if WORDREAD_UNSAFE
92	static volatile aio_req ress, rese; /* queue start, queue end */
93		213
		214	static unsigned int get_nready ()
		215	{
		216	unsigned int retval;
		217
		218	LOCK (reqlock);
		219	retval = nready;
		220	UNLOCK (reqlock);
		221
		222	return retval;
		223	}
		224
		225	static unsigned int get_npending ()
		226	{
		227	unsigned int retval;
		228
		229	LOCK (reslock);
		230	retval = npending;
		231	UNLOCK (reslock);
		232
		233	return retval;
		234	}
		235
		236	#else
		237
		238	# define get_nready() nready
		239	# define get_npending() npending
		240
		241	#endif
		242
		243	/*
		244	* a somewhat faster data structure might be nice, but
		245	* with 8 priorities this actually needs <20 insns
		246	* per shift, the most expensive operation.
		247	*/
		248	typedef struct {
		249	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		250	int size;
		251	} reqq;
		252
		253	static reqq req_queue;
		254	static reqq res_queue;
		255
		256	int reqq_push (reqq *q, aio_req req)
		257	{
		258	int pri = req->pri;
		259	req->next = 0;
		260
		261	if (q->qe[pri])
		262	{
		263	q->qe[pri]->next = req;
		264	q->qe[pri] = req;
		265	}
		266	else
		267	q->qe[pri] = q->qs[pri] = req;
		268
		269	return q->size++;
		270	}
		271
		272	aio_req reqq_shift (reqq *q)
		273	{
		274	int pri;
		275
		276	if (!q->size)
		277	return 0;
		278
		279	--q->size;
		280
		281	for (pri = NUM_PRI; pri--; )
		282	{
		283	aio_req req = q->qs[pri];
		284
		285	if (req)
		286	{
		287	if (!(q->qs[pri] = req->next))
		288	q->qe[pri] = 0;
		289
		290	return req;
		291	}
		292	}
		293
		294	abort ();
		295	}
		296
		297	static int poll_cb (int max);
		298	static void req_invoke (aio_req req);
		299	static void req_free (aio_req req);
		300	static void req_cancel (aio_req req);
		301
		302	/* must be called at most once */
		303	static SV *req_sv (aio_req req, const char *klass)
		304	{
		305	if (!req->self)
		306	{
		307	req->self = (SV *)newHV ();
		308	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		309	}
		310
		311	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		312	}
		313
		314	static aio_req SvAIO_REQ (SV *sv)
		315	{
		316	MAGIC *mg;
		317
		318	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		319	croak ("object of class " AIO_REQ_KLASS " expected");
		320
		321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		322
		323	return mg ? (aio_req)mg->mg_ptr : 0;
		324	}
		325
		326	static void aio_grp_feed (aio_req grp)
		327	{
		328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		329	{
		330	int old_len = grp->length;
		331
		332	if (grp->fh2 && SvOK (grp->fh2))
		333	{
		334	dSP;
		335
		336	ENTER;
		337	SAVETMPS;
		338	PUSHMARK (SP);
		339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		340	PUTBACK;
		341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		342	SPAGAIN;
		343	FREETMPS;
		344	LEAVE;
		345	}
		346
		347	/* stop if no progress has been made */
		348	if (old_len == grp->length)
		349	{
		350	SvREFCNT_dec (grp->fh2);
		351	grp->fh2 = 0;
		352	break;
		353	}
		354	}
		355	}
		356
		357	static void aio_grp_dec (aio_req grp)
		358	{
		359	--grp->length;
		360
		361	/* call feeder, if applicable */
		362	aio_grp_feed (grp);
		363
		364	/* finish, if done */
		365	if (!grp->length && grp->fd)
		366	{
		367	req_invoke (grp);
		368	req_free (grp);
		369	}
		370	}
		371
		372	static void req_invoke (aio_req req)
		373	{
		374	dSP;
		375
		376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		377	{
		378	ENTER;
		379	SAVETMPS;
		380	PUSHMARK (SP);
		381	EXTEND (SP, 1);
		382
		383	switch (req->type)
		384	{
		385	case REQ_READDIR:
		386	{
		387	SV *rv = &PL_sv_undef;
		388
		389	if (req->result >= 0)
		390	{
		391	int i;
		392	char *buf = req->data2ptr;
		393	AV *av = newAV ();
		394
		395	av_extend (av, req->result - 1);
		396
		397	for (i = 0; i < req->result; ++i)
		398	{
		399	SV *sv = newSVpv (buf, 0);
		400
		401	av_store (av, i, sv);
		402	buf += SvCUR (sv) + 1;
		403	}
		404
		405	rv = sv_2mortal (newRV_noinc ((SV *)av));
		406	}
		407
		408	PUSHs (rv);
		409	}
		410	break;
		411
		412	case REQ_OPEN:
		413	{
		414	/* convert fd to fh */
		415	SV *fh;
		416
		417	PUSHs (sv_2mortal (newSViv (req->result)));
		418	PUTBACK;
		419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		420	SPAGAIN;
		421
		422	fh = SvREFCNT_inc (POPs);
		423
		424	PUSHMARK (SP);
		425	XPUSHs (sv_2mortal (fh));
		426	}
		427	break;
		428
		429	case REQ_GROUP:
		430	req->fd = 2; /* mark group as finished */
		431
		432	if (req->data)
		433	{
		434	int i;
		435	AV *av = (AV *)req->data;
		436
		437	EXTEND (SP, AvFILL (av) + 1);
		438	for (i = 0; i <= AvFILL (av); ++i)
		439	PUSHs (*av_fetch (av, i, 0));
		440	}
		441	break;
		442
		443	case REQ_NOP:
		444	case REQ_BUSY:
		445	break;
		446
		447	default:
		448	PUSHs (sv_2mortal (newSViv (req->result)));
		449	break;
		450	}
		451
		452	errno = req->errorno;
		453
		454	PUTBACK;
		455	call_sv (req->callback, G_VOID | G_EVAL);
		456	SPAGAIN;
		457
		458	FREETMPS;
		459	LEAVE;
		460	}
		461
		462	if (req->grp)
		463	{
		464	aio_req grp = req->grp;
		465
		466	/* unlink request */
		467	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		468	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		469
		470	if (grp->grp_first == req)
		471	grp->grp_first = req->grp_next;
		472
		473	aio_grp_dec (grp);
		474	}
		475
		476	if (SvTRUE (ERRSV))
		477	{
		478	req_free (req);
		479	croak (0);
		480	}
		481	}
		482
94	static void free_req (aio_req req)	483	static void req_free (aio_req req)
95	{	484	{
96	if (req->data)	485	if (req->self)
		486	{
		487	sv_unmagic (req->self, PERL_MAGIC_ext);
		488	SvREFCNT_dec (req->self);
		489	}
		490
97	SvREFCNT_dec (req->data);	491	SvREFCNT_dec (req->data);
98
99	if (req->fh)
100	SvREFCNT_dec (req->fh);	492	SvREFCNT_dec (req->fh);
101
102	if (req->fh2)
103	SvREFCNT_dec (req->fh2);	493	SvREFCNT_dec (req->fh2);
104
105	if (req->statdata)
106	Safefree (req->statdata);
107
108	if (req->callback)
109	SvREFCNT_dec (req->callback);	494	SvREFCNT_dec (req->callback);
		495	Safefree (req->statdata);
110		496
111	if (req->type == REQ_READDIR && req->result >= 0)	497	if (req->type == REQ_READDIR)
112	free (req->data2ptr);	498	free (req->data2ptr);
113		499
114	Safefree (req);	500	Safefree (req);
115	}	501	}
116		502
117	static void	503	static void req_cancel_subs (aio_req grp)
118	poll_wait ()
119	{	504	{
120	if (nreqs && !ress)	505	aio_req sub;
		506
		507	if (grp->type != REQ_GROUP)
		508	return;
		509
		510	SvREFCNT_dec (grp->fh2);
		511	grp->fh2 = 0;
		512
		513	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		514	req_cancel (sub);
		515	}
		516
		517	static void req_cancel (aio_req req)
		518	{
		519	req->flags |= FLAG_CANCELLED;
		520
		521	req_cancel_subs (req);
		522	}
		523
		524	static void *aio_proc(void *arg);
		525
		526	static void start_thread (void)
		527	{
		528	sigset_t fullsigset, oldsigset;
		529	pthread_attr_t attr;
		530
		531	worker *wrk = calloc (1, sizeof (worker));
		532
		533	if (!wrk)
		534	croak ("unable to allocate worker thread data");
		535
		536	pthread_attr_init (&attr);
		537	pthread_attr_setstacksize (&attr, STACKSIZE);
		538	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		539	#ifdef PTHREAD_SCOPE_PROCESS
		540	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		541	#endif
		542
		543	sigfillset (&fullsigset);
		544
		545	LOCK (wrklock);
		546	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		547
		548	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		549	{
		550	wrk->prev = &wrk_first;
		551	wrk->next = wrk_first.next;
		552	wrk_first.next->prev = wrk;
		553	wrk_first.next = wrk;
		554	++started;
121	{	555	}
		556	else
		557	free (wrk);
		558
		559	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		560	UNLOCK (wrklock);
		561	}
		562
		563	static void maybe_start_thread ()
		564	{
		565	if (started >= wanted)
		566	return;
		567
		568	/* todo: maybe use idle here, but might be less exact */
		569	if ((int)nready <= (int)started - (int)(nreqs - get_nready () - get_npending ()))
		570	return;
		571
		572	start_thread ();
		573	}
		574
		575	static void req_send (aio_req req)
		576	{
		577	++nreqs;
		578
		579	LOCK (reqlock);
		580	++nready;
		581	reqq_push (&req_queue, req);
		582	pthread_cond_signal (&reqwait);
		583	UNLOCK (reqlock);
		584
		585	maybe_start_thread ();
		586	}
		587
		588	static void end_thread (void)
		589	{
		590	aio_req req;
		591
		592	Newz (0, req, 1, aio_cb);
		593
		594	req->type = REQ_QUIT;
		595	req->pri = PRI_MAX + PRI_BIAS;
		596
		597	LOCK (reqlock);
		598	reqq_push (&req_queue, req);
		599	pthread_cond_signal (&reqwait);
		600	UNLOCK (reqlock);
		601
		602	LOCK (wrklock);
		603	--started;
		604	UNLOCK (wrklock);
		605	}
		606
		607	static void min_parallel (int nthreads)
		608	{
		609	if (wanted < nthreads)
		610	wanted = nthreads;
		611	}
		612
		613	static void max_parallel (int nthreads)
		614	{
		615	if (wanted > nthreads)
		616	wanted = nthreads;
		617
		618	while (started > wanted)
		619	end_thread ();
		620	}
		621
		622	static void poll_wait ()
		623	{
122	fd_set rfd;	624	fd_set rfd;
		625
		626	while (nreqs)
		627	{
		628	int size;
		629	if (WORDREAD_UNSAFE) LOCK (reslock);
		630	size = res_queue.size;
		631	if (WORDREAD_UNSAFE) UNLOCK (reslock);
		632
		633	if (size)
		634	return;
		635
		636	maybe_start_thread ();
		637
123	FD_ZERO(&rfd);	638	FD_ZERO(&rfd);
124	FD_SET(respipe [0], &rfd);	639	FD_SET(respipe [0], &rfd);
125		640
126	select (respipe [0] + 1, &rfd, 0, 0, 0);	641	select (respipe [0] + 1, &rfd, 0, 0, 0);
127	}	642	}
128	}	643	}
129		644
130	static int	645	static int poll_cb (int max)
131	poll_cb ()
132	{	646	{
133	dSP;	647	dSP;
134	int count = 0;	648	int count = 0;
135	int do_croak = 0;	649	int do_croak = 0;
136	aio_req req;	650	aio_req req;
137		651
138	for (;;)	652	for (;;)
139	{	653	{
140	pthread_mutex_lock (&reslock);	654	while (max <= 0 || count < max)
141	req = ress;
142
143	if (req)
144	{	655	{
145	ress = req->next;	656	maybe_start_thread ();
146		657
		658	LOCK (reslock);
		659	req = reqq_shift (&res_queue);
		660
147	if (!ress)	661	if (req)
148	{	662	{
		663	--npending;
		664
		665	if (!res_queue.size)
		666	{
149	/* read any signals sent by the worker threads */	667	/* read any signals sent by the worker threads */
150	char buf [32];	668	char buf [32];
151	while (read (respipe [0], buf, 32) == 32)	669	while (read (respipe [0], buf, 32) == 32)
		670	;
152	;	671	}
153
154	rese = 0;
155	}	672	}
156	}
157		673
158	pthread_mutex_unlock (&reslock);	674	UNLOCK (reslock);
159		675
160	if (!req)	676	if (!req)
161	break;	677	break;
162		678
163	nreqs--;	679	--nreqs;
164		680
165	if (req->type == REQ_QUIT)
166	started--;
167	else
168	{
169	int errorno = errno;
170	errno = req->errorno;
171
172	if (req->type == REQ_READ)	681	if (req->type == REQ_GROUP && req->length)
173	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
174
175	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176	SvREADONLY_off (req->data);
177
178	if (req->statdata)
179	{	682	{
180	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	683	req->fd = 1; /* mark request as delayed */
181	PL_laststatval = req->result;	684	continue;
182	PL_statcache = *(req->statdata);
183	}
184
185	ENTER;
186	PUSHMARK (SP);
187
188	if (req->type == REQ_READDIR)
189	{
190	SV *rv = &PL_sv_undef;
191
192	if (req->result >= 0)
193	{
194	char *buf = req->data2ptr;
195	AV *av = newAV ();
196
197	while (req->result)
198	{
199	SV *sv = newSVpv (buf, 0);
200
201	av_push (av, sv);
202	buf += SvCUR (sv) + 1;
203	req->result--;
204	}
205
206	rv = sv_2mortal (newRV_noinc ((SV *)av));
207	}
208
209	XPUSHs (rv);
210	}	685	}
211	else	686	else
212	{	687	{
213	XPUSHs (sv_2mortal (newSViv (req->result)));
214
215	if (req->type == REQ_OPEN)	688	if (req->type == REQ_READ)
		689	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		690
		691	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		692	SvREADONLY_off (req->data);
		693
		694	if (req->statdata)
216	{	695	{
217	/* convert fd to fh */	696	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
218	SV *fh;	697	PL_laststatval = req->result;
219		698	PL_statcache = *(req->statdata);
220	PUTBACK;
221	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
222	SPAGAIN;
223
224	fh = SvREFCNT_inc (POPs);
225
226	PUSHMARK (SP);
227	XPUSHs (sv_2mortal (fh));
228	}	699	}
		700
		701	req_invoke (req);
		702
		703	count++;
229	}	704	}
230		705
231	if (SvOK (req->callback))	706	req_free (req);
232	{
233	PUTBACK;
234	call_sv (req->callback, G_VOID | G_EVAL);
235	SPAGAIN;
236
237	if (SvTRUE (ERRSV))
238	{
239	free_req (req);
240	croak (0);
241	}
242	}
243
244	LEAVE;
245
246	errno = errorno;
247	count++;
248	}	707	}
249		708
250	free_req (req);	709	if (nreqs <= max_outstanding)
		710	break;
		711
		712	poll_wait ();
		713
		714	max = 0;
251	}	715	}
252		716
253	return count;	717	return count;
254	}
255
256	static void *aio_proc(void *arg);
257
258	static void
259	start_thread (void)
260	{
261	sigset_t fullsigset, oldsigset;
262	pthread_t tid;
263	pthread_attr_t attr;
264
265	pthread_attr_init (&attr);
266	pthread_attr_setstacksize (&attr, STACKSIZE);
267	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
268
269	sigfillset (&fullsigset);
270	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
271
272	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
273	started++;
274
275	sigprocmask (SIG_SETMASK, &oldsigset, 0);
276	}
277
278	static void
279	send_req (aio_req req)
280	{
281	while (started < wanted && nreqs >= started)
282	start_thread ();
283
284	nreqs++;
285
286	pthread_mutex_lock (&reqlock);
287
288	req->next = 0;
289
290	if (reqe)
291	{
292	reqe->next = req;
293	reqe = req;
294	}
295	else
296	reqe = reqs = req;
297
298	pthread_cond_signal (&reqwait);
299	pthread_mutex_unlock (&reqlock);
300
301	if (nreqs > max_outstanding)
302	for (;;)
303	{
304	poll_cb ();
305
306	if (nreqs <= max_outstanding)
307	break;
308
309	poll_wait ();
310	}
311	}
312
313	static void
314	end_thread (void)
315	{
316	aio_req req;
317	Newz (0, req, 1, aio_cb);
318	req->type = REQ_QUIT;
319
320	send_req (req);
321	}
322
323	static void min_parallel (int nthreads)
324	{
325	if (wanted < nthreads)
326	wanted = nthreads;
327	}
328
329	static void max_parallel (int nthreads)
330	{
331	int cur = started;
332
333	if (wanted > nthreads)
334	wanted = nthreads;
335
336	while (cur > wanted)
337	{
338	end_thread ();
339	cur--;
340	}
341
342	while (started > wanted)
343	{
344	poll_wait ();
345	poll_cb ();
346	}
347	}	718	}
348		719
349	static void create_pipe ()	720	static void create_pipe ()
350	{	721	{
351	if (pipe (respipe))	722	if (pipe (respipe))
…		…
370	* normal read/write by using a mutex. slows down execution a lot,	741	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.	742	* but that's your problem, not mine.
372	*/	743	*/
373	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	744	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374		745
375	static ssize_t	746	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{	747	{
378	ssize_t res;	748	ssize_t res;
379	off_t ooffset;	749	off_t ooffset;
380		750
381	pthread_mutex_lock (&preadwritelock);	751	LOCK (preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);	752	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);	753	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);	754	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);	755	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&preadwritelock);	756	UNLOCK (preadwritelock);
387		757
388	return res;	758	return res;
389	}	759	}
390		760
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)	761	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
393	{	762	{
394	ssize_t res;	763	ssize_t res;
395	off_t ooffset;	764	off_t ooffset;
396		765
397	pthread_mutex_lock (&preadwritelock);	766	LOCK (preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);	767	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);	768	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);	769	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);	770	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&preadwritelock);	771	UNLOCK (preadwritelock);
403		772
404	return res;	773	return res;
405	}	774	}
406	#endif	775	#endif
407		776
408	#if !HAVE_FDATASYNC	777	#if !HAVE_FDATASYNC
409	# define fdatasync fsync	778	# define fdatasync fsync
410	#endif	779	#endif
411		780
412	#if !HAVE_READAHEAD	781	#if !HAVE_READAHEAD
413	# define readahead aio_readahead	782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
414		783
415	static ssize_t	784	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
416	readahead (int fd, off_t offset, size_t count)
417	{	785	{
418	char readahead_buf[4096];	786	dBUF;
419		787
420	while (count > 0)	788	while (count > 0)
421	{	789	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
423		791
424	pread (fd, readahead_buf, len, offset);	792	pread (fd, aio_buf, len, offset);
425	offset += len;	793	offset += len;
426	count -= len;	794	count -= len;
427	}	795	}
428		796
429	errno = 0;	797	errno = 0;
430	}	798	}
		799
431	#endif	800	#endif
432		801
433	#if !HAVE_READDIR_R	802	#if !HAVE_READDIR_R
434	# define readdir_r aio_readdir_r	803	# define readdir_r aio_readdir_r
435		804
436	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	805	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
437		806
438	static int
439	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	807	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
440	{	808	{
441	struct dirent *e;	809	struct dirent *e;
442	int errorno;	810	int errorno;
443		811
444	pthread_mutex_lock (&readdirlock);	812	LOCK (readdirlock);
445		813
446	e = readdir (dirp);	814	e = readdir (dirp);
447	errorno = errno;	815	errorno = errno;
448		816
449	if (e)	817	if (e)
…		…
452	strcpy (ent->d_name, e->d_name);	820	strcpy (ent->d_name, e->d_name);
453	}	821	}
454	else	822	else
455	*res = 0;	823	*res = 0;
456		824
457	pthread_mutex_unlock (&readdirlock);	825	UNLOCK (readdirlock);
458		826
459	errno = errorno;	827	errno = errorno;
460	return e ? 0 : -1;	828	return e ? 0 : -1;
461	}	829	}
462	#endif	830	#endif
463		831
464	/* sendfile always needs emulation */	832	/* sendfile always needs emulation */
465	static ssize_t
466	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	833	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
467	{	834	{
468	ssize_t res;	835	ssize_t res;
469		836
470	if (!count)	837	if (!count)
471	return 0;	838	return 0;
…		…
482	{	849	{
483	off_t sbytes;	850	off_t sbytes;
484	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
485		852
486	if (res < 0 && sbytes)	853	if (res < 0 && sbytes)
487	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
488	res = sbytes;	855	res = sbytes;
489	}	856	}
490		857
491	# elif __hpux	858	# elif __hpux
492	res = sendfile (ofd, ifd, offset, count, 0, 0);	859	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
520	#endif	887	#endif
521	)	888	)
522	)	889	)
523	{	890	{
524	/* emulate sendfile. this is a major pain in the ass */	891	/* emulate sendfile. this is a major pain in the ass */
525	char buf[4096];	892	dBUF;
		893
526	res = 0;	894	res = 0;
527		895
528	while (count)	896	while (count)
529	{	897	{
530	ssize_t cnt;	898	ssize_t cnt;
531		899
532	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
533		901
534	if (cnt <= 0)	902	if (cnt <= 0)
535	{	903	{
536	if (cnt && !res) res = -1;	904	if (cnt && !res) res = -1;
537	break;	905	break;
538	}	906	}
539		907
540	cnt = write (ofd, buf, cnt);	908	cnt = write (ofd, aio_buf, cnt);
541		909
542	if (cnt <= 0)	910	if (cnt <= 0)
543	{	911	{
544	if (cnt && !res) res = -1;	912	if (cnt && !res) res = -1;
545	break;	913	break;
…		…
553		921
554	return res;	922	return res;
555	}	923	}
556		924
557	/* read a full directory */	925	/* read a full directory */
558	static int	926	static void scandir_ (aio_req req, worker *self)
559	scandir_ (const char *path, void **namesp)
560	{	927	{
561	DIR *dirp = opendir (path);	928	DIR *dirp;
562	union	929	union
563	{	930	{
564	struct dirent d;	931	struct dirent d;
565	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
566	} u;	933	} *u;
567	struct dirent *entp;	934	struct dirent *entp;
568	char *name, *names;	935	char *name, *names;
569	int memlen = 4096;	936	int memlen = 4096;
570	int memofs = 0;	937	int memofs = 0;
571	int res = 0;	938	int res = 0;
572	int errorno;	939	int errorno;
573		940
574	if (!dirp)	941	LOCK (wrklock);
575	return -1;	942	self->dirp = dirp = opendir (req->dataptr);
576		943	self->dbuf = u = malloc (sizeof (*u));
577	names = malloc (memlen);	944	req->data2ptr = names = malloc (memlen);
		945	UNLOCK (wrklock);
		946
		947	if (dirp && u && names)
		948	for (;;)
		949	{
		950	errno = 0;
		951	readdir_r (dirp, &u->d, &entp);
		952
		953	if (!entp)
		954	break;
		955
		956	name = entp->d_name;
		957
		958	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		959	{
		960	int len = strlen (name) + 1;
		961
		962	res++;
		963
		964	while (memofs + len > memlen)
		965	{
		966	memlen *= 2;
		967	LOCK (wrklock);
		968	req->data2ptr = names = realloc (names, memlen);
		969	UNLOCK (wrklock);
		970
		971	if (!names)
		972	break;
		973	}
		974
		975	memcpy (names + memofs, name, len);
		976	memofs += len;
		977	}
		978	}
		979
		980	if (errno)
		981	res = -1;
		982
		983	req->result = res;
		984	}
		985
		986	/*****************************************************************************/
		987
		988	static void *aio_proc (void *thr_arg)
		989	{
		990	aio_req req;
		991	struct timespec ts;
		992	worker *self = (worker *)thr_arg;
		993
		994	/* try to distribute timeouts somewhat evenly */
		995	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		996	* (1000000000UL / 1024UL);
578		997
579	for (;;)	998	for (;;)
580	{	999	{
581	errno = 0, readdir_r (dirp, &u.d, &entp);	1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
582		1001
583	if (!entp)	1002	LOCK (reqlock);
584	break;
585
586	name = entp->d_name;
587
588	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
589	{
590	int len = strlen (name) + 1;
591
592	res++;
593
594	while (memofs + len > memlen)
595	{
596	memlen *= 2;
597	names = realloc (names, memlen);
598	if (!names)
599	break;
600	}
601
602	memcpy (names + memofs, name, len);
603	memofs += len;
604	}
605	}
606
607	errorno = errno;
608	closedir (dirp);
609
610	if (errorno)
611	{
612	free (names);
613	errno = errorno;
614	res = -1;
615	}
616
617	*namesp = (void *)names;
618	return res;
619	}
620
621	/*****************************************************************************/
622
623	static void *
624	aio_proc (void *thr_arg)
625	{
626	aio_req req;
627	int type;
628
629	do
630	{
631	pthread_mutex_lock (&reqlock);
632		1003
633	for (;;)	1004	for (;;)
634	{	1005	{
635	req = reqs;	1006	self->req = req = reqq_shift (&req_queue);
636
637	if (reqs)
638	{
639	reqs = reqs->next;
640	if (!reqs) reqe = 0;
641	}
642		1007
643	if (req)	1008	if (req)
644	break;	1009	break;
645		1010
		1011	++idle;
		1012
		1013	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1014	== ETIMEDOUT)
		1015	{
		1016	if (idle > max_idle)
		1017	{
		1018	--idle;
		1019	UNLOCK (reqlock);
		1020	LOCK (wrklock);
		1021	--started;
		1022	UNLOCK (wrklock);
		1023	goto quit;
		1024	}
		1025
		1026	/* we are allowed to idle, so do so without any timeout */
646	pthread_cond_wait (&reqwait, &reqlock);	1027	pthread_cond_wait (&reqwait, &reqlock);
		1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1029	}
		1030
		1031	--idle;
647	}	1032	}
648		1033
649	pthread_mutex_unlock (&reqlock);	1034	--nready;
		1035
		1036	UNLOCK (reqlock);
650		1037
651	errno = 0; /* strictly unnecessary */	1038	errno = 0; /* strictly unnecessary */
652		1039
653	type = req->type;	1040	if (!(req->flags & FLAG_CANCELLED))
654
655	switch (type)	1041	switch (req->type)
656	{	1042	{
657	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1043	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1044	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
659		1045
660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1046	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
661	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1047	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
662		1048
663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
664	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
665	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
666		1052
667	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1053	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
668	case REQ_CLOSE: req->result = close (req->fd); break;	1054	case REQ_CLOSE: req->result = close (req->fd); break;
669	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
670	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
671	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
672	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
673	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1059	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1060	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
674		1061
675	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
676	case REQ_FSYNC: req->result = fsync (req->fd); break;	1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
677	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1064	case REQ_READDIR: scandir_ (req, self); break;
678		1065
		1066	case REQ_BUSY:
		1067	{
		1068	struct timeval tv;
		1069
		1070	tv.tv_sec = req->fd;
		1071	tv.tv_usec = req->fd2;
		1072
		1073	req->result = select (0, 0, 0, 0, &tv);
		1074	}
		1075
		1076	case REQ_GROUP:
		1077	case REQ_NOP:
		1078	break;
		1079
679	case REQ_QUIT:	1080	case REQ_QUIT:
680	break;	1081	goto quit;
681		1082
682	default:	1083	default:
683	req->result = ENOSYS;	1084	req->result = ENOSYS;
684	break;	1085	break;
685	}	1086	}
686		1087
687	req->errorno = errno;	1088	req->errorno = errno;
688		1089
689	pthread_mutex_lock (&reslock);	1090	LOCK (reslock);
690		1091
691	req->next = 0;	1092	++npending;
692		1093
693	if (rese)	1094	if (!reqq_push (&res_queue, req))
694	{
695	rese->next = req;
696	rese = req;
697	}
698	else
699	{
700	rese = ress = req;
701
702	/* write a dummy byte to the pipe so fh becomes ready */	1095	/* write a dummy byte to the pipe so fh becomes ready */
703	write (respipe [1], &respipe, 1);	1096	write (respipe [1], &respipe, 1);
704	}
705		1097
706	pthread_mutex_unlock (&reslock);	1098	self->req = 0;
		1099	worker_clear (self);
		1100
		1101	UNLOCK (reslock);
707	}	1102	}
708	while (type != REQ_QUIT);	1103
		1104	quit:
		1105	LOCK (wrklock);
		1106	worker_free (self);
		1107	UNLOCK (wrklock);
709		1108
710	return 0;	1109	return 0;
711	}	1110	}
712		1111
713	/*****************************************************************************/	1112	/*****************************************************************************/
714		1113
715	static void atfork_prepare (void)	1114	static void atfork_prepare (void)
716	{	1115	{
717	pthread_mutex_lock (&reqlock);	1116	LOCK (wrklock);
718	pthread_mutex_lock (&reslock);	1117	LOCK (reqlock);
		1118	LOCK (reslock);
719	#if !HAVE_PREADWRITE	1119	#if !HAVE_PREADWRITE
720	pthread_mutex_lock (&preadwritelock);	1120	LOCK (preadwritelock);
721	#endif	1121	#endif
722	#if !HAVE_READDIR_R	1122	#if !HAVE_READDIR_R
723	pthread_mutex_lock (&readdirlock);	1123	LOCK (readdirlock);
724	#endif	1124	#endif
725	}	1125	}
726		1126
727	static void atfork_parent (void)	1127	static void atfork_parent (void)
728	{	1128	{
729	#if !HAVE_READDIR_R	1129	#if !HAVE_READDIR_R
730	pthread_mutex_unlock (&readdirlock);	1130	UNLOCK (readdirlock);
731	#endif	1131	#endif
732	#if !HAVE_PREADWRITE	1132	#if !HAVE_PREADWRITE
733	pthread_mutex_unlock (&preadwritelock);	1133	UNLOCK (preadwritelock);
734	#endif	1134	#endif
735	pthread_mutex_unlock (&reslock);	1135	UNLOCK (reslock);
736	pthread_mutex_unlock (&reqlock);	1136	UNLOCK (reqlock);
		1137	UNLOCK (wrklock);
737	}	1138	}
738		1139
739	static void atfork_child (void)	1140	static void atfork_child (void)
740	{	1141	{
741	aio_req prv;	1142	aio_req prv;
742		1143
		1144	while (prv = reqq_shift (&req_queue))
		1145	req_free (prv);
		1146
		1147	while (prv = reqq_shift (&res_queue))
		1148	req_free (prv);
		1149
		1150	while (wrk_first.next != &wrk_first)
		1151	{
		1152	worker *wrk = wrk_first.next;
		1153
		1154	if (wrk->req)
		1155	req_free (wrk->req);
		1156
		1157	worker_clear (wrk);
		1158	worker_free (wrk);
		1159	}
		1160
743	started = 0;	1161	started = 0;
744		1162	idle = 0;
745	while (reqs)	1163	nreqs = 0;
746	{	1164	nready = 0;
747	prv = reqs;	1165	npending = 0;
748	reqs = prv->next;
749	free_req (prv);
750	}
751
752	reqs = reqe = 0;
753
754	while (ress)
755	{
756	prv = ress;
757	ress = prv->next;
758	free_req (prv);
759	}
760
761	ress = rese = 0;
762		1166
763	close (respipe [0]);	1167	close (respipe [0]);
764	close (respipe [1]);	1168	close (respipe [1]);
765	create_pipe ();	1169	create_pipe ();
766		1170
767	atfork_parent ();	1171	atfork_parent ();
768	}	1172	}
769		1173
770	#define dREQ \	1174	#define dREQ \
771	aio_req req; \	1175	aio_req req; \
		1176	int req_pri = next_pri; \
		1177	next_pri = DEFAULT_PRI + PRI_BIAS; \
772	\	1178	\
773	if (SvOK (callback) && !SvROK (callback)) \	1179	if (SvOK (callback) && !SvROK (callback)) \
774	croak ("clalback must be undef or of reference type"); \	1180	croak ("callback must be undef or of reference type"); \
775	\	1181	\
776	Newz (0, req, 1, aio_cb); \	1182	Newz (0, req, 1, aio_cb); \
777	if (!req) \	1183	if (!req) \
778	croak ("out of memory during aio_req allocation"); \	1184	croak ("out of memory during aio_req allocation"); \
779	\	1185	\
780	req->callback = newSVsv (callback);	1186	req->callback = newSVsv (callback); \
		1187	req->pri = req_pri
		1188
		1189	#define REQ_SEND \
		1190	req_send (req); \
		1191	\
		1192	if (GIMME_V != G_VOID) \
		1193	XPUSHs (req_sv (req, AIO_REQ_KLASS));
781		1194
782	MODULE = IO::AIO PACKAGE = IO::AIO	1195	MODULE = IO::AIO PACKAGE = IO::AIO
783		1196
784	PROTOTYPES: ENABLE	1197	PROTOTYPES: ENABLE
785		1198
786	BOOT:	1199	BOOT:
787	{	1200	{
788	HV *stash = gv_stashpv ("IO::AIO", 1);	1201	HV *stash = gv_stashpv ("IO::AIO", 1);
		1202
789	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	1205	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1206	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1207	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1208	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
792		1209
793	create_pipe ();	1210	create_pipe ();
794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
795	}	1212	}
796		1213
797	void	1214	void
798	min_parallel (nthreads)	1215	min_parallel (int nthreads)
799	int nthreads
800	PROTOTYPE: $	1216	PROTOTYPE: $
801		1217
802	void	1218	void
803	max_parallel (nthreads)	1219	max_parallel (int nthreads)
804	int nthreads
805	PROTOTYPE: $	1220	PROTOTYPE: $
806		1221
807	int	1222	int
808	max_outstanding (nreqs)	1223	max_outstanding (int maxreqs)
809	int nreqs	1224	PROTOTYPE: $
810	PROTOTYPE: $
811	CODE:	1225	CODE:
812	RETVAL = max_outstanding;	1226	RETVAL = max_outstanding;
813	max_outstanding = nreqs;	1227	max_outstanding = maxreqs;
		1228	OUTPUT:
		1229	RETVAL
814		1230
815	void	1231	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
817	SV * pathname	1233	SV * pathname
818	int flags	1234	int flags
819	int mode	1235	int mode
820	SV * callback	1236	SV * callback
821	PROTOTYPE: $$$;$	1237	PROTOTYPE: $$$;$
822	CODE:	1238	PPCODE:
823	{	1239	{
824	dREQ;	1240	dREQ;
825		1241
826	req->type = REQ_OPEN;	1242	req->type = REQ_OPEN;
827	req->data = newSVsv (pathname);	1243	req->data = newSVsv (pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);	1244	req->dataptr = SvPVbyte_nolen (req->data);
829	req->fd = flags;	1245	req->fd = flags;
830	req->mode = mode;	1246	req->mode = mode;
831		1247
832	send_req (req);	1248	REQ_SEND;
833	}	1249	}
834		1250
835	void	1251	void
836	aio_close (fh,callback=&PL_sv_undef)	1252	aio_close (fh,callback=&PL_sv_undef)
837	SV * fh	1253	SV * fh
…		…
839	PROTOTYPE: $;$	1255	PROTOTYPE: $;$
840	ALIAS:	1256	ALIAS:
841	aio_close = REQ_CLOSE	1257	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	1258	aio_fsync = REQ_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	1259	aio_fdatasync = REQ_FDATASYNC
844	CODE:	1260	PPCODE:
845	{	1261	{
846	dREQ;	1262	dREQ;
847		1263
848	req->type = ix;	1264	req->type = ix;
849	req->fh = newSVsv (fh);	1265	req->fh = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1266	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
851		1267
852	send_req (req);	1268	REQ_SEND (req);
853	}	1269	}
854		1270
855	void	1271	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1272	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
857	SV * fh	1273	SV * fh
…		…
862	SV * callback	1278	SV * callback
863	ALIAS:	1279	ALIAS:
864	aio_read = REQ_READ	1280	aio_read = REQ_READ
865	aio_write = REQ_WRITE	1281	aio_write = REQ_WRITE
866	PROTOTYPE: $$$$$;$	1282	PROTOTYPE: $$$$$;$
867	CODE:	1283	PPCODE:
868	{	1284	{
869	aio_req req;	1285	aio_req req;
870	STRLEN svlen;	1286	STRLEN svlen;
871	char *svptr = SvPVbyte (data, svlen);	1287	char *svptr = SvPVbyte (data, svlen);
872		1288
…		…
910	{	1326	{
911	SvREADONLY_on (data);	1327	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	1328	req->data2ptr = (void *)data;
913	}	1329	}
914		1330
915	send_req (req);	1331	REQ_SEND;
916	}	1332	}
917	}	1333	}
918		1334
919	void	1335	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1336	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
…		…
922	SV * in_fh	1338	SV * in_fh
923	UV in_offset	1339	UV in_offset
924	UV length	1340	UV length
925	SV * callback	1341	SV * callback
926	PROTOTYPE: $$$$;$	1342	PROTOTYPE: $$$$;$
927	CODE:	1343	PPCODE:
928	{	1344	{
929	dREQ;	1345	dREQ;
930		1346
931	req->type = REQ_SENDFILE;	1347	req->type = REQ_SENDFILE;
932	req->fh = newSVsv (out_fh);	1348	req->fh = newSVsv (out_fh);
…		…
934	req->fh2 = newSVsv (in_fh);	1350	req->fh2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1351	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936	req->offset = in_offset;	1352	req->offset = in_offset;
937	req->length = length;	1353	req->length = length;
938		1354
939	send_req (req);	1355	REQ_SEND;
940	}	1356	}
941		1357
942	void	1358	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1359	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
944	SV * fh	1360	SV * fh
945	UV offset	1361	UV offset
946	IV length	1362	IV length
947	SV * callback	1363	SV * callback
948	PROTOTYPE: $$$;$	1364	PROTOTYPE: $$$;$
949	CODE:	1365	PPCODE:
950	{	1366	{
951	dREQ;	1367	dREQ;
952		1368
953	req->type = REQ_READAHEAD;	1369	req->type = REQ_READAHEAD;
954	req->fh = newSVsv (fh);	1370	req->fh = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1371	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
956	req->offset = offset;	1372	req->offset = offset;
957	req->length = length;	1373	req->length = length;
958		1374
959	send_req (req);	1375	REQ_SEND;
960	}	1376	}
961		1377
962	void	1378	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	1379	aio_stat (fh_or_path,callback=&PL_sv_undef)
964	SV * fh_or_path	1380	SV * fh_or_path
965	SV * callback	1381	SV * callback
966	ALIAS:	1382	ALIAS:
967	aio_stat = REQ_STAT	1383	aio_stat = REQ_STAT
968	aio_lstat = REQ_LSTAT	1384	aio_lstat = REQ_LSTAT
969	CODE:	1385	PPCODE:
970	{	1386	{
971	dREQ;	1387	dREQ;
972		1388
973	New (0, req->statdata, 1, Stat_t);	1389	New (0, req->statdata, 1, Stat_t);
974	if (!req->statdata)	1390	if (!req->statdata)
975	{	1391	{
976	free_req (req);	1392	req_free (req);
977	croak ("out of memory during aio_req->statdata allocation");	1393	croak ("out of memory during aio_req->statdata allocation");
978	}	1394	}
979		1395
980	if (SvPOK (fh_or_path))	1396	if (SvPOK (fh_or_path))
981	{	1397	{
…		…
988	req->type = REQ_FSTAT;	1404	req->type = REQ_FSTAT;
989	req->fh = newSVsv (fh_or_path);	1405	req->fh = newSVsv (fh_or_path);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1406	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
991	}	1407	}
992		1408
993	send_req (req);	1409	REQ_SEND;
994	}	1410	}
995		1411
996	void	1412	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	1413	aio_unlink (pathname,callback=&PL_sv_undef)
998	SV * pathname	1414	SV * pathname
999	SV * callback	1415	SV * callback
1000	ALIAS:	1416	ALIAS:
1001	aio_unlink = REQ_UNLINK	1417	aio_unlink = REQ_UNLINK
1002	aio_rmdir = REQ_RMDIR	1418	aio_rmdir = REQ_RMDIR
1003	aio_readdir = REQ_READDIR	1419	aio_readdir = REQ_READDIR
1004	CODE:	1420	PPCODE:
1005	{	1421	{
1006	dREQ;	1422	dREQ;
1007		1423
1008	req->type = ix;	1424	req->type = ix;
1009	req->data = newSVsv (pathname);	1425	req->data = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	1426	req->dataptr = SvPVbyte_nolen (req->data);
1011		1427
1012	send_req (req);	1428	REQ_SEND;
1013	}	1429	}
1014		1430
1015	void	1431	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1432	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1017	SV * oldpath	1433	SV * oldpath
…		…
1019	SV * callback	1435	SV * callback
1020	ALIAS:	1436	ALIAS:
1021	aio_link = REQ_LINK	1437	aio_link = REQ_LINK
1022	aio_symlink = REQ_SYMLINK	1438	aio_symlink = REQ_SYMLINK
1023	aio_rename = REQ_RENAME	1439	aio_rename = REQ_RENAME
1024	CODE:	1440	PPCODE:
1025	{	1441	{
1026	dREQ;	1442	dREQ;
1027		1443
1028	req->type = ix;	1444	req->type = ix;
1029	req->fh = newSVsv (oldpath);	1445	req->fh = newSVsv (oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	1446	req->data2ptr = SvPVbyte_nolen (req->fh);
1031	req->data = newSVsv (newpath);	1447	req->data = newSVsv (newpath);
1032	req->dataptr = SvPVbyte_nolen (req->data);	1448	req->dataptr = SvPVbyte_nolen (req->data);
1033		1449
1034	send_req (req);	1450	REQ_SEND;
1035	}	1451	}
1036		1452
1037	#if 0
1038
1039	# undocumented, because it does not cancel active requests
1040	void	1453	void
1041	cancel_most_requests ()	1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
		1455	SV * pathname
		1456	SV * callback
		1457	UV mode
		1458	UV dev
		1459	PPCODE:
		1460	{
		1461	dREQ;
		1462
		1463	req->type = REQ_MKNOD;
		1464	req->data = newSVsv (pathname);
		1465	req->dataptr = SvPVbyte_nolen (req->data);
		1466	req->mode = (mode_t)mode;
		1467	req->offset = dev;
		1468
		1469	REQ_SEND;
		1470	}
		1471
		1472	void
		1473	aio_busy (delay,callback=&PL_sv_undef)
		1474	double delay
		1475	SV * callback
		1476	PPCODE:
		1477	{
		1478	dREQ;
		1479
		1480	req->type = REQ_BUSY;
		1481	req->fd = delay < 0. ? 0 : delay;
		1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1483
		1484	REQ_SEND;
		1485	}
		1486
		1487	void
		1488	aio_group (callback=&PL_sv_undef)
		1489	SV * callback
1042	PROTOTYPE:	1490	PROTOTYPE: ;$
1043	CODE:	1491	PPCODE:
1044	{	1492	{
1045	aio_req *req;	1493	dREQ;
1046		1494
1047	pthread_mutex_lock (&reqlock);	1495	req->type = REQ_GROUP;
1048	for (req = reqs; req; req = req->next)	1496	req_send (req);
1049	req->flags |= 1;
1050	pthread_mutex_unlock (&reqlock);
1051		1497
1052	pthread_mutex_lock (&reslock);	1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1053	for (req = ress; req; req = req->next)
1054	req->flags |= 1;
1055	pthread_mutex_unlock (&reslock);
1056	}	1499	}
1057		1500
1058	#endif	1501	void
		1502	aio_nop (callback=&PL_sv_undef)
		1503	SV * callback
		1504	PPCODE:
		1505	{
		1506	dREQ;
		1507
		1508	req->type = REQ_NOP;
		1509
		1510	REQ_SEND;
		1511	}
		1512
		1513	int
		1514	aioreq_pri (int pri = 0)
		1515	PROTOTYPE: ;$
		1516	CODE:
		1517	RETVAL = next_pri - PRI_BIAS;
		1518	if (items > 0)
		1519	{
		1520	if (pri < PRI_MIN) pri = PRI_MIN;
		1521	if (pri > PRI_MAX) pri = PRI_MAX;
		1522	next_pri = pri + PRI_BIAS;
		1523	}
		1524	OUTPUT:
		1525	RETVAL
		1526
		1527	void
		1528	aioreq_nice (int nice = 0)
		1529	CODE:
		1530	nice = next_pri - nice;
		1531	if (nice < PRI_MIN) nice = PRI_MIN;
		1532	if (nice > PRI_MAX) nice = PRI_MAX;
		1533	next_pri = nice + PRI_BIAS;
1059		1534
1060	void	1535	void
1061	flush ()	1536	flush ()
1062	PROTOTYPE:	1537	PROTOTYPE:
1063	CODE:	1538	CODE:
1064	while (nreqs)	1539	while (nreqs)
1065	{	1540	{
1066	poll_wait ();	1541	poll_wait ();
1067	poll_cb ();	1542	poll_cb (0);
1068	}	1543	}
1069		1544
1070	void	1545	void
1071	poll()	1546	poll()
1072	PROTOTYPE:	1547	PROTOTYPE:
1073	CODE:	1548	CODE:
1074	if (nreqs)	1549	if (nreqs)
1075	{	1550	{
1076	poll_wait ();	1551	poll_wait ();
1077	poll_cb ();	1552	poll_cb (0);
1078	}	1553	}
1079		1554
1080	int	1555	int
1081	poll_fileno()	1556	poll_fileno()
1082	PROTOTYPE:	1557	PROTOTYPE:
…		…
1087		1562
1088	int	1563	int
1089	poll_cb(...)	1564	poll_cb(...)
1090	PROTOTYPE:	1565	PROTOTYPE:
1091	CODE:	1566	CODE:
1092	RETVAL = poll_cb ();	1567	RETVAL = poll_cb (0);
		1568	OUTPUT:
		1569	RETVAL
		1570
		1571	int
		1572	poll_some(int max = 0)
		1573	PROTOTYPE: $
		1574	CODE:
		1575	RETVAL = poll_cb (max);
1093	OUTPUT:	1576	OUTPUT:
1094	RETVAL	1577	RETVAL
1095		1578
1096	void	1579	void
1097	poll_wait()	1580	poll_wait()
…		…
1106	CODE:	1589	CODE:
1107	RETVAL = nreqs;	1590	RETVAL = nreqs;
1108	OUTPUT:	1591	OUTPUT:
1109	RETVAL	1592	RETVAL
1110		1593
		1594	int
		1595	nready()
		1596	PROTOTYPE:
		1597	CODE:
		1598	RETVAL = get_nready ();
		1599	OUTPUT:
		1600	RETVAL
		1601
		1602	int
		1603	npending()
		1604	PROTOTYPE:
		1605	CODE:
		1606	RETVAL = get_npending ();
		1607	OUTPUT:
		1608	RETVAL
		1609
		1610	PROTOTYPES: DISABLE
		1611
		1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1613
		1614	void
		1615	cancel (aio_req_ornot req)
		1616	CODE:
		1617	req_cancel (req);
		1618
		1619	void
		1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1621	CODE:
		1622	SvREFCNT_dec (req->callback);
		1623	req->callback = newSVsv (callback);
		1624
		1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1626
		1627	void
		1628	add (aio_req grp, ...)
		1629	PPCODE:
		1630	{
		1631	int i;
		1632	aio_req req;
		1633
		1634	if (grp->fd == 2)
		1635	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1636
		1637	for (i = 1; i < items; ++i )
		1638	{
		1639	if (GIMME_V != G_VOID)
		1640	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1641
		1642	req = SvAIO_REQ (ST (i));
		1643
		1644	if (req)
		1645	{
		1646	++grp->length;
		1647	req->grp = grp;
		1648
		1649	req->grp_prev = 0;
		1650	req->grp_next = grp->grp_first;
		1651
		1652	if (grp->grp_first)
		1653	grp->grp_first->grp_prev = req;
		1654
		1655	grp->grp_first = req;
		1656	}
		1657	}
		1658	}
		1659
		1660	void
		1661	cancel_subs (aio_req_ornot req)
		1662	CODE:
		1663	req_cancel_subs (req);
		1664
		1665	void
		1666	result (aio_req grp, ...)
		1667	CODE:
		1668	{
		1669	int i;
		1670	AV *av;
		1671
		1672	grp->errorno = errno;
		1673
		1674	av = newAV ();
		1675
		1676	for (i = 1; i < items; ++i )
		1677	av_push (av, newSVsv (ST (i)));
		1678
		1679	SvREFCNT_dec (grp->data);
		1680	grp->data = (SV *)av;
		1681	}
		1682
		1683	void
		1684	errno (aio_req grp, int errorno = errno)
		1685	CODE:
		1686	grp->errorno = errorno;
		1687
		1688	void
		1689	limit (aio_req grp, int limit)
		1690	CODE:
		1691	grp->fd2 = limit;
		1692	aio_grp_feed (grp);
		1693
		1694	void
		1695	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1696	CODE:
		1697	{
		1698	SvREFCNT_dec (grp->fh2);
		1699	grp->fh2 = newSVsv (callback);
		1700
		1701	if (grp->fd2 <= 0)
		1702	grp->fd2 = 2;
		1703
		1704	aio_grp_feed (grp);
		1705	}
		1706

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