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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.38 by root, Sun Aug 28 10:51:33 2005 UTC vs.
Revision 1.85 by root, Sat Oct 28 23:32:29 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"
…		…
8	#include "autoconf/config.h"	17	#include "autoconf/config.h"
9		18
10	#include <pthread.h>	19	#include <pthread.h>
11		20
12	#include <stddef.h>	21	#include <stddef.h>
		22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
13	#include <sys/types.h>	25	#include <sys/types.h>
14	#include <sys/stat.h>	26	#include <sys/stat.h>
15	#include <limits.h>	27	#include <limits.h>
16	#include <unistd.h>	28	#include <unistd.h>
17	#include <fcntl.h>	29	#include <fcntl.h>
…		…
31	# else	43	# else
32	# error sendfile support requested but not available	44	# error sendfile support requested but not available
33	# endif	45	# endif
34	#endif	46	#endif
35		47
		48	/* number of seconds after which idle threads exit */
		49	#define IDLE_TIMEOUT 10
		50
		51	/* used for struct dirent, AIX doesn't provide it */
		52	#ifndef NAME_MAX
		53	# define NAME_MAX 4096
		54	#endif
		55
		56	#ifndef PTHREAD_STACK_MIN
		57	/* care for broken platforms, e.g. windows */
		58	# define PTHREAD_STACK_MIN 16384
		59	#endif
		60
36	#if __ia64	61	#if __ia64
37	# define STACKSIZE 65536	62	# define STACKSIZE 65536
		63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		64	# define STACKSIZE PTHREAD_STACK_MIN
38	#else	65	#else
39	# 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 WORDACCESS_UNSAFE
		74	# if __i386 || __x86_64
		75	# define WORDACCESS_UNSAFE 0
		76	# else
		77	# define WORDACCESS_UNSAFE 1
40	#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;
41		91
42	enum {	92	enum {
43	REQ_QUIT,	93	REQ_QUIT,
44	REQ_OPEN, REQ_CLOSE,	94	REQ_OPEN, REQ_CLOSE,
45	REQ_READ, REQ_WRITE, REQ_READAHEAD,	95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
46	REQ_SENDFILE,	96	REQ_SENDFILE,
47	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
48	REQ_FSYNC, REQ_FDATASYNC,	98	REQ_FSYNC, REQ_FDATASYNC,
49	REQ_UNLINK, REQ_RMDIR,	99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
50	REQ_READDIR,	100	REQ_MKNOD, REQ_READDIR,
51	REQ_SYMLINK,	101	REQ_LINK, REQ_SYMLINK,
		102	REQ_GROUP, REQ_NOP,
		103	REQ_BUSY,
52	};	104	};
53		105
		106	#define AIO_REQ_KLASS "IO::AIO::REQ"
		107	#define AIO_GRP_KLASS "IO::AIO::GRP"
		108
54	typedef struct aio_cb {	109	typedef struct aio_cb
		110	{
55	struct aio_cb *volatile next;	111	struct aio_cb *volatile next;
56		112
57	int type;	113	SV *data, *callback;
58		114	SV *fh, *fh2;
59	/* should receive a cleanup, with unions */	115	void *dataptr, *data2ptr;
60	int fd, fd2;	116	Stat_t *statdata;
61	off_t offset;	117	off_t offset;
62	size_t length;	118	size_t length;
63	ssize_t result;	119	ssize_t result;
		120
		121	STRLEN dataoffset;
		122	int type;
		123	int fd, fd2;
		124	int errorno;
64	mode_t mode; /* open */	125	mode_t mode; /* open */
65	int errorno;
66	SV *data, *callback;
67	SV *fh, *fh2;
68	void *dataptr, *data2ptr;
69	STRLEN dataoffset;
70		126
71	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;
72	} aio_cb;	132	} aio_cb;
73		133
		134	enum {
		135	FLAG_CANCELLED = 0x01,
		136	};
		137
74	typedef aio_cb *aio_req;	138	typedef aio_cb *aio_req;
		139	typedef aio_cb *aio_req_ornot;
75		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	#define AIO_TICKS ((1000000 + 1023) >> 10)
		151
		152	static unsigned int max_poll_time = 0;
		153	static unsigned int max_poll_reqs = 0;
		154
		155	/* calculcate time difference in ~1/AIO_TICKS of a second */
		156	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
		157	{
		158	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
		159	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
		160	}
		161
		162	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		163
76	static int started, wanted;	164	static unsigned int started, idle, wanted;
77	static volatile int nreqs;	165
78	static int max_outstanding = 1<<30;	166	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		167	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		168	#else
		169	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		170	#endif
		171
		172	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		173	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		174
		175	/* worker threads management */
		176	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		177
		178	typedef struct worker {
		179	/* locked by wrklock */
		180	struct worker *prev, *next;
		181
		182	pthread_t tid;
		183
		184	/* locked by reslock, reqlock or wrklock */
		185	aio_req req; /* currently processed request */
		186	void *dbuf;
		187	DIR *dirp;
		188	} worker;
		189
		190	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		191
		192	static void worker_clear (worker *wrk)
		193	{
		194	if (wrk->dirp)
		195	{
		196	closedir (wrk->dirp);
		197	wrk->dirp = 0;
		198	}
		199
		200	if (wrk->dbuf)
		201	{
		202	free (wrk->dbuf);
		203	wrk->dbuf = 0;
		204	}
		205	}
		206
		207	static void worker_free (worker *wrk)
		208	{
		209	wrk->next->prev = wrk->prev;
		210	wrk->prev->next = wrk->next;
		211
		212	free (wrk);
		213	}
		214
		215	static volatile unsigned int nreqs, nready, npending;
		216	static volatile unsigned int max_idle = 4;
		217	static volatile unsigned int max_outstanding = 0xffffffff;
79	static int respipe [2];	218	static int respipe [2];
80		219
81	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	220	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
82	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	221	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
83	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	222	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
84		223
85	static volatile aio_req reqs, reqe; /* queue start, queue end */	224	#if WORDACCESS_UNSAFE
86	static volatile aio_req ress, rese; /* queue start, queue end */
87		225
		226	static unsigned int get_nready ()
		227	{
		228	unsigned int retval;
		229
		230	LOCK (reqlock);
		231	retval = nready;
		232	UNLOCK (reqlock);
		233
		234	return retval;
		235	}
		236
		237	static unsigned int get_npending ()
		238	{
		239	unsigned int retval;
		240
		241	LOCK (reslock);
		242	retval = npending;
		243	UNLOCK (reslock);
		244
		245	return retval;
		246	}
		247
		248	static unsigned int get_nthreads ()
		249	{
		250	unsigned int retval;
		251
		252	LOCK (wrklock);
		253	retval = started;
		254	UNLOCK (wrklock);
		255
		256	return retval;
		257	}
		258
		259	#else
		260
		261	# define get_nready() nready
		262	# define get_npending() npending
		263	# define get_nthreads() started
		264
		265	#endif
		266
		267	/*
		268	* a somewhat faster data structure might be nice, but
		269	* with 8 priorities this actually needs <20 insns
		270	* per shift, the most expensive operation.
		271	*/
		272	typedef struct {
		273	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		274	int size;
		275	} reqq;
		276
		277	static reqq req_queue;
		278	static reqq res_queue;
		279
		280	int reqq_push (reqq *q, aio_req req)
		281	{
		282	int pri = req->pri;
		283	req->next = 0;
		284
		285	if (q->qe[pri])
		286	{
		287	q->qe[pri]->next = req;
		288	q->qe[pri] = req;
		289	}
		290	else
		291	q->qe[pri] = q->qs[pri] = req;
		292
		293	return q->size++;
		294	}
		295
		296	aio_req reqq_shift (reqq *q)
		297	{
		298	int pri;
		299
		300	if (!q->size)
		301	return 0;
		302
		303	--q->size;
		304
		305	for (pri = NUM_PRI; pri--; )
		306	{
		307	aio_req req = q->qs[pri];
		308
		309	if (req)
		310	{
		311	if (!(q->qs[pri] = req->next))
		312	q->qe[pri] = 0;
		313
		314	return req;
		315	}
		316	}
		317
		318	abort ();
		319	}
		320
		321	static int poll_cb ();
		322	static void req_invoke (aio_req req);
		323	static void req_free (aio_req req);
		324	static void req_cancel (aio_req req);
		325
		326	/* must be called at most once */
		327	static SV *req_sv (aio_req req, const char *klass)
		328	{
		329	if (!req->self)
		330	{
		331	req->self = (SV *)newHV ();
		332	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		333	}
		334
		335	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		336	}
		337
		338	static aio_req SvAIO_REQ (SV *sv)
		339	{
		340	MAGIC *mg;
		341
		342	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		343	croak ("object of class " AIO_REQ_KLASS " expected");
		344
		345	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		346
		347	return mg ? (aio_req)mg->mg_ptr : 0;
		348	}
		349
		350	static void aio_grp_feed (aio_req grp)
		351	{
		352	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		353	{
		354	int old_len = grp->length;
		355
		356	if (grp->fh2 && SvOK (grp->fh2))
		357	{
		358	dSP;
		359
		360	ENTER;
		361	SAVETMPS;
		362	PUSHMARK (SP);
		363	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		364	PUTBACK;
		365	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		366	SPAGAIN;
		367	FREETMPS;
		368	LEAVE;
		369	}
		370
		371	/* stop if no progress has been made */
		372	if (old_len == grp->length)
		373	{
		374	SvREFCNT_dec (grp->fh2);
		375	grp->fh2 = 0;
		376	break;
		377	}
		378	}
		379	}
		380
		381	static void aio_grp_dec (aio_req grp)
		382	{
		383	--grp->length;
		384
		385	/* call feeder, if applicable */
		386	aio_grp_feed (grp);
		387
		388	/* finish, if done */
		389	if (!grp->length && grp->fd)
		390	{
		391	req_invoke (grp);
		392	req_free (grp);
		393	}
		394	}
		395
		396	static void req_invoke (aio_req req)
		397	{
		398	dSP;
		399
		400	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		401	{
		402	ENTER;
		403	SAVETMPS;
		404	PUSHMARK (SP);
		405	EXTEND (SP, 1);
		406
		407	switch (req->type)
		408	{
		409	case REQ_READDIR:
		410	{
		411	SV *rv = &PL_sv_undef;
		412
		413	if (req->result >= 0)
		414	{
		415	int i;
		416	char *buf = req->data2ptr;
		417	AV *av = newAV ();
		418
		419	av_extend (av, req->result - 1);
		420
		421	for (i = 0; i < req->result; ++i)
		422	{
		423	SV *sv = newSVpv (buf, 0);
		424
		425	av_store (av, i, sv);
		426	buf += SvCUR (sv) + 1;
		427	}
		428
		429	rv = sv_2mortal (newRV_noinc ((SV *)av));
		430	}
		431
		432	PUSHs (rv);
		433	}
		434	break;
		435
		436	case REQ_OPEN:
		437	{
		438	/* convert fd to fh */
		439	SV *fh;
		440
		441	PUSHs (sv_2mortal (newSViv (req->result)));
		442	PUTBACK;
		443	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		444	SPAGAIN;
		445
		446	fh = SvREFCNT_inc (POPs);
		447
		448	PUSHMARK (SP);
		449	XPUSHs (sv_2mortal (fh));
		450	}
		451	break;
		452
		453	case REQ_GROUP:
		454	req->fd = 2; /* mark group as finished */
		455
		456	if (req->data)
		457	{
		458	int i;
		459	AV *av = (AV *)req->data;
		460
		461	EXTEND (SP, AvFILL (av) + 1);
		462	for (i = 0; i <= AvFILL (av); ++i)
		463	PUSHs (*av_fetch (av, i, 0));
		464	}
		465	break;
		466
		467	case REQ_NOP:
		468	case REQ_BUSY:
		469	break;
		470
		471	default:
		472	PUSHs (sv_2mortal (newSViv (req->result)));
		473	break;
		474	}
		475
		476	errno = req->errorno;
		477
		478	PUTBACK;
		479	call_sv (req->callback, G_VOID | G_EVAL);
		480	SPAGAIN;
		481
		482	FREETMPS;
		483	LEAVE;
		484	}
		485
		486	if (req->grp)
		487	{
		488	aio_req grp = req->grp;
		489
		490	/* unlink request */
		491	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		492	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		493
		494	if (grp->grp_first == req)
		495	grp->grp_first = req->grp_next;
		496
		497	aio_grp_dec (grp);
		498	}
		499
		500	if (SvTRUE (ERRSV))
		501	{
		502	req_free (req);
		503	croak (0);
		504	}
		505	}
		506
88	static void free_req (aio_req req)	507	static void req_free (aio_req req)
89	{	508	{
90	if (req->data)	509	if (req->self)
		510	{
		511	sv_unmagic (req->self, PERL_MAGIC_ext);
		512	SvREFCNT_dec (req->self);
		513	}
		514
91	SvREFCNT_dec (req->data);	515	SvREFCNT_dec (req->data);
92
93	if (req->fh)
94	SvREFCNT_dec (req->fh);	516	SvREFCNT_dec (req->fh);
95
96	if (req->fh2)
97	SvREFCNT_dec (req->fh2);	517	SvREFCNT_dec (req->fh2);
98
99	if (req->statdata)
100	Safefree (req->statdata);
101
102	if (req->callback)
103	SvREFCNT_dec (req->callback);	518	SvREFCNT_dec (req->callback);
		519	Safefree (req->statdata);
104		520
105	if (req->type == REQ_READDIR && req->result >= 0)	521	if (req->type == REQ_READDIR)
106	free (req->data2ptr);	522	free (req->data2ptr);
107		523
108	Safefree (req);	524	Safefree (req);
109	}	525	}
110		526
111	static void	527	static void req_cancel_subs (aio_req grp)
112	poll_wait ()
113	{	528	{
114	if (nreqs && !ress)	529	aio_req sub;
		530
		531	if (grp->type != REQ_GROUP)
		532	return;
		533
		534	SvREFCNT_dec (grp->fh2);
		535	grp->fh2 = 0;
		536
		537	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		538	req_cancel (sub);
		539	}
		540
		541	static void req_cancel (aio_req req)
		542	{
		543	req->flags |= FLAG_CANCELLED;
		544
		545	req_cancel_subs (req);
		546	}
		547
		548	static void *aio_proc(void *arg);
		549
		550	static void start_thread (void)
		551	{
		552	sigset_t fullsigset, oldsigset;
		553	pthread_attr_t attr;
		554
		555	worker *wrk = calloc (1, sizeof (worker));
		556
		557	if (!wrk)
		558	croak ("unable to allocate worker thread data");
		559
		560	pthread_attr_init (&attr);
		561	pthread_attr_setstacksize (&attr, STACKSIZE);
		562	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		563	#ifdef PTHREAD_SCOPE_PROCESS
		564	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
		565	#endif
		566
		567	sigfillset (&fullsigset);
		568
		569	LOCK (wrklock);
		570	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		571
		572	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		573	{
		574	wrk->prev = &wrk_first;
		575	wrk->next = wrk_first.next;
		576	wrk_first.next->prev = wrk;
		577	wrk_first.next = wrk;
		578	++started;
115	{	579	}
		580	else
		581	free (wrk);
		582
		583	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		584	UNLOCK (wrklock);
		585	}
		586
		587	static void maybe_start_thread ()
		588	{
		589	if (get_nthreads () >= wanted)
		590	return;
		591
		592	/* todo: maybe use idle here, but might be less exact */
		593	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
		594	return;
		595
		596	start_thread ();
		597	}
		598
		599	static void req_send (aio_req req)
		600	{
		601	++nreqs;
		602
		603	LOCK (reqlock);
		604	++nready;
		605	reqq_push (&req_queue, req);
		606	pthread_cond_signal (&reqwait);
		607	UNLOCK (reqlock);
		608
		609	maybe_start_thread ();
		610	}
		611
		612	static void end_thread (void)
		613	{
		614	aio_req req;
		615
		616	Newz (0, req, 1, aio_cb);
		617
		618	req->type = REQ_QUIT;
		619	req->pri = PRI_MAX + PRI_BIAS;
		620
		621	LOCK (reqlock);
		622	reqq_push (&req_queue, req);
		623	pthread_cond_signal (&reqwait);
		624	UNLOCK (reqlock);
		625
		626	LOCK (wrklock);
		627	--started;
		628	UNLOCK (wrklock);
		629	}
		630
		631	static void set_max_idle (int nthreads)
		632	{
		633	if (WORDACCESS_UNSAFE) LOCK (reqlock);
		634	max_idle = nthreads <= 0 ? 1 : nthreads;
		635	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
		636	}
		637
		638	static void min_parallel (int nthreads)
		639	{
		640	if (wanted < nthreads)
		641	wanted = nthreads;
		642	}
		643
		644	static void max_parallel (int nthreads)
		645	{
		646	if (wanted > nthreads)
		647	wanted = nthreads;
		648
		649	while (started > wanted)
		650	end_thread ();
		651	}
		652
		653	static void poll_wait ()
		654	{
116	fd_set rfd;	655	fd_set rfd;
		656
		657	while (nreqs)
		658	{
		659	int size;
		660	if (WORDACCESS_UNSAFE) LOCK (reslock);
		661	size = res_queue.size;
		662	if (WORDACCESS_UNSAFE) UNLOCK (reslock);
		663
		664	if (size)
		665	return;
		666
		667	maybe_start_thread ();
		668
117	FD_ZERO(&rfd);	669	FD_ZERO(&rfd);
118	FD_SET(respipe [0], &rfd);	670	FD_SET(respipe [0], &rfd);
119		671
120	select (respipe [0] + 1, &rfd, 0, 0, 0);	672	select (respipe [0] + 1, &rfd, 0, 0, 0);
121	}	673	}
122	}	674	}
123		675
124	static int	676	static int poll_cb ()
125	poll_cb ()
126	{	677	{
127	dSP;	678	dSP;
128	int count = 0;	679	int count = 0;
		680	int maxreqs = max_poll_reqs;
129	int do_croak = 0;	681	int do_croak = 0;
		682	struct timeval tv_start, tv_now;
130	aio_req req;	683	aio_req req;
131		684
		685	if (max_poll_time)
		686	gettimeofday (&tv_start, 0);
		687
132	for (;;)	688	for (;;)
133	{	689	{
134	pthread_mutex_lock (&reslock);	690	for (;;)
135	req = ress;
136
137	if (req)
138	{	691	{
139	ress = req->next;	692	maybe_start_thread ();
140		693
		694	LOCK (reslock);
		695	req = reqq_shift (&res_queue);
		696
141	if (!ress)	697	if (req)
142	{	698	{
		699	--npending;
		700
		701	if (!res_queue.size)
		702	{
143	/* read any signals sent by the worker threads */	703	/* read any signals sent by the worker threads */
144	char buf [32];	704	char buf [32];
145	while (read (respipe [0], buf, 32) == 32)	705	while (read (respipe [0], buf, 32) == 32)
		706	;
146	;	707	}
147
148	rese = 0;
149	}	708	}
150	}
151		709
152	pthread_mutex_unlock (&reslock);	710	UNLOCK (reslock);
153		711
154	if (!req)	712	if (!req)
155	break;	713	break;
156		714
157	nreqs--;	715	--nreqs;
158		716
159	if (req->type == REQ_QUIT)
160	started--;
161	else
162	{
163	int errorno = errno;
164	errno = req->errorno;
165
166	if (req->type == REQ_READ)	717	if (req->type == REQ_GROUP && req->length)
167	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
168
169	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
170	SvREADONLY_off (req->data);
171
172	if (req->statdata)
173	{	718	{
174	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	719	req->fd = 1; /* mark request as delayed */
175	PL_laststatval = req->result;	720	continue;
176	PL_statcache = *(req->statdata);
177	}
178
179	ENTER;
180	PUSHMARK (SP);
181
182	if (req->type == REQ_READDIR)
183	{
184	SV *rv = &PL_sv_undef;
185
186	if (req->result >= 0)
187	{
188	char *buf = req->data2ptr;
189	AV *av = newAV ();
190
191	while (req->result)
192	{
193	SV *sv = newSVpv (buf, 0);
194
195	av_push (av, sv);
196	buf += SvCUR (sv) + 1;
197	req->result--;
198	}
199
200	rv = sv_2mortal (newRV_noinc ((SV *)av));
201	}
202
203	XPUSHs (rv);
204	}	721	}
205	else	722	else
206	{	723	{
207	XPUSHs (sv_2mortal (newSViv (req->result)));
208
209	if (req->type == REQ_OPEN)	724	if (req->type == REQ_READ)
		725	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		726
		727	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		728	SvREADONLY_off (req->data);
		729
		730	if (req->statdata)
210	{	731	{
211	/* convert fd to fh */	732	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
212	SV *fh;	733	PL_laststatval = req->result;
213		734	PL_statcache = *(req->statdata);
214	PUTBACK;
215	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
216	SPAGAIN;
217
218	fh = SvREFCNT_inc (POPs);
219
220	PUSHMARK (SP);
221	XPUSHs (sv_2mortal (fh));
222	}	735	}
		736
		737	req_invoke (req);
		738
		739	count++;
223	}	740	}
224		741
225	if (SvOK (req->callback))	742	req_free (req);
		743
		744	if (maxreqs && !--maxreqs)
		745	break;
		746
		747	if (max_poll_time)
226	{	748	{
227	PUTBACK;	749	gettimeofday (&tv_now, 0);
228	call_sv (req->callback, G_VOID | G_EVAL);
229	SPAGAIN;
230		750
231	if (SvTRUE (ERRSV))	751	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
232	{	752	break;
233	free_req (req);
234	croak (0);
235	}
236	}	753	}
237
238	LEAVE;
239
240	errno = errorno;
241	count++;
242	}	754	}
243		755
244	free_req (req);	756	if (nreqs <= max_outstanding)
		757	break;
		758
		759	poll_wait ();
		760
		761	++maxreqs;
245	}	762	}
246		763
247	return count;	764	return count;
248	}
249
250	static void *aio_proc(void *arg);
251
252	static void
253	start_thread (void)
254	{
255	sigset_t fullsigset, oldsigset;
256	pthread_t tid;
257	pthread_attr_t attr;
258
259	pthread_attr_init (&attr);
260	pthread_attr_setstacksize (&attr, STACKSIZE);
261	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
262
263	sigfillset (&fullsigset);
264	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
265
266	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
267	started++;
268
269	sigprocmask (SIG_SETMASK, &oldsigset, 0);
270	}
271
272	static void
273	send_req (aio_req req)
274	{
275	while (started < wanted && nreqs >= started)
276	start_thread ();
277
278	nreqs++;
279
280	pthread_mutex_lock (&reqlock);
281
282	req->next = 0;
283
284	if (reqe)
285	{
286	reqe->next = req;
287	reqe = req;
288	}
289	else
290	reqe = reqs = req;
291
292	pthread_cond_signal (&reqwait);
293	pthread_mutex_unlock (&reqlock);
294
295	if (nreqs > max_outstanding)
296	for (;;)
297	{
298	poll_cb ();
299
300	if (nreqs <= max_outstanding)
301	break;
302
303	poll_wait ();
304	}
305	}
306
307	static void
308	end_thread (void)
309	{
310	aio_req req;
311	Newz (0, req, 1, aio_cb);
312	req->type = REQ_QUIT;
313
314	send_req (req);
315	}
316
317	static void min_parallel (int nthreads)
318	{
319	if (wanted < nthreads)
320	wanted = nthreads;
321	}
322
323	static void max_parallel (int nthreads)
324	{
325	int cur = started;
326
327	if (wanted > nthreads)
328	wanted = nthreads;
329
330	while (cur > wanted)
331	{
332	end_thread ();
333	cur--;
334	}
335
336	while (started > wanted)
337	{
338	poll_wait ();
339	poll_cb ();
340	}
341	}	765	}
342		766
343	static void create_pipe ()	767	static void create_pipe ()
344	{	768	{
345	if (pipe (respipe))	769	if (pipe (respipe))
…		…
364	* normal read/write by using a mutex. slows down execution a lot,	788	* normal read/write by using a mutex. slows down execution a lot,
365	* but that's your problem, not mine.	789	* but that's your problem, not mine.
366	*/	790	*/
367	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	791	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
368		792
369	static ssize_t	793	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
370	pread (int fd, void *buf, size_t count, off_t offset)
371	{	794	{
372	ssize_t res;	795	ssize_t res;
373	off_t ooffset;	796	off_t ooffset;
374		797
375	pthread_mutex_lock (&preadwritelock);	798	LOCK (preadwritelock);
376	ooffset = lseek (fd, 0, SEEK_CUR);	799	ooffset = lseek (fd, 0, SEEK_CUR);
377	lseek (fd, offset, SEEK_SET);	800	lseek (fd, offset, SEEK_SET);
378	res = read (fd, buf, count);	801	res = read (fd, buf, count);
379	lseek (fd, ooffset, SEEK_SET);	802	lseek (fd, ooffset, SEEK_SET);
380	pthread_mutex_unlock (&preadwritelock);	803	UNLOCK (preadwritelock);
381		804
382	return res;	805	return res;
383	}	806	}
384		807
385	static ssize_t
386	pwrite (int fd, void *buf, size_t count, off_t offset)	808	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
387	{	809	{
388	ssize_t res;	810	ssize_t res;
389	off_t ooffset;	811	off_t ooffset;
390		812
391	pthread_mutex_lock (&preadwritelock);	813	LOCK (preadwritelock);
392	ooffset = lseek (fd, 0, SEEK_CUR);	814	ooffset = lseek (fd, 0, SEEK_CUR);
393	lseek (fd, offset, SEEK_SET);	815	lseek (fd, offset, SEEK_SET);
394	res = write (fd, buf, count);	816	res = write (fd, buf, count);
395	lseek (fd, offset, SEEK_SET);	817	lseek (fd, offset, SEEK_SET);
396	pthread_mutex_unlock (&preadwritelock);	818	UNLOCK (preadwritelock);
397		819
398	return res;	820	return res;
399	}	821	}
400	#endif	822	#endif
401		823
402	#if !HAVE_FDATASYNC	824	#if !HAVE_FDATASYNC
403	# define fdatasync fsync	825	# define fdatasync fsync
404	#endif	826	#endif
405		827
406	#if !HAVE_READAHEAD	828	#if !HAVE_READAHEAD
407	# define readahead aio_readahead	829	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
408		830
409	static ssize_t	831	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
410	readahead (int fd, off_t offset, size_t count)
411	{	832	{
412	char readahead_buf[4096];	833	dBUF;
413		834
414	while (count > 0)	835	while (count > 0)
415	{	836	{
416	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	837	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
417		838
418	pread (fd, readahead_buf, len, offset);	839	pread (fd, aio_buf, len, offset);
419	offset += len;	840	offset += len;
420	count -= len;	841	count -= len;
421	}	842	}
422		843
423	errno = 0;	844	errno = 0;
424	}	845	}
		846
425	#endif	847	#endif
426		848
427	#if !HAVE_READDIR_R	849	#if !HAVE_READDIR_R
428	# define readdir_r aio_readdir_r	850	# define readdir_r aio_readdir_r
429		851
430	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	852	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
431		853
432	static int
433	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	854	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
434	{	855	{
435	struct dirent *e;	856	struct dirent *e;
436	int errorno;	857	int errorno;
437		858
438	pthread_mutex_lock (&readdirlock);	859	LOCK (readdirlock);
439		860
440	e = readdir (dirp);	861	e = readdir (dirp);
441	errorno = errno;	862	errorno = errno;
442		863
443	if (e)	864	if (e)
…		…
446	strcpy (ent->d_name, e->d_name);	867	strcpy (ent->d_name, e->d_name);
447	}	868	}
448	else	869	else
449	*res = 0;	870	*res = 0;
450		871
451	pthread_mutex_unlock (&readdirlock);	872	UNLOCK (readdirlock);
452		873
453	errno = errorno;	874	errno = errorno;
454	return e ? 0 : -1;	875	return e ? 0 : -1;
455	}	876	}
456	#endif	877	#endif
457		878
458	/* sendfile always needs emulation */	879	/* sendfile always needs emulation */
459	static ssize_t
460	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	880	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
461	{	881	{
462	ssize_t res;	882	ssize_t res;
463		883
464	if (!count)	884	if (!count)
465	return 0;	885	return 0;
…		…
476	{	896	{
477	off_t sbytes;	897	off_t sbytes;
478	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	898	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
479		899
480	if (res < 0 && sbytes)	900	if (res < 0 && sbytes)
481	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */	901	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
482	res = sbytes;	902	res = sbytes;
483	}	903	}
484		904
485	# elif __hpux	905	# elif __hpux
486	res = sendfile (ofd, ifd, offset, count, 0, 0);	906	res = sendfile (ofd, ifd, offset, count, 0, 0);
…		…
514	#endif	934	#endif
515	)	935	)
516	)	936	)
517	{	937	{
518	/* emulate sendfile. this is a major pain in the ass */	938	/* emulate sendfile. this is a major pain in the ass */
519	char buf[4096];	939	dBUF;
		940
520	res = 0;	941	res = 0;
521		942
522	while (count)	943	while (count)
523	{	944	{
524	ssize_t cnt;	945	ssize_t cnt;
525		946
526	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	947	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
527		948
528	if (cnt <= 0)	949	if (cnt <= 0)
529	{	950	{
530	if (cnt && !res) res = -1;	951	if (cnt && !res) res = -1;
531	break;	952	break;
532	}	953	}
533		954
534	cnt = write (ofd, buf, cnt);	955	cnt = write (ofd, aio_buf, cnt);
535		956
536	if (cnt <= 0)	957	if (cnt <= 0)
537	{	958	{
538	if (cnt && !res) res = -1;	959	if (cnt && !res) res = -1;
539	break;	960	break;
…		…
547		968
548	return res;	969	return res;
549	}	970	}
550		971
551	/* read a full directory */	972	/* read a full directory */
552	static int	973	static void scandir_ (aio_req req, worker *self)
553	scandir_ (const char *path, void **namesp)
554	{	974	{
555	DIR *dirp = opendir (path);	975	DIR *dirp;
556	union	976	union
557	{	977	{
558	struct dirent d;	978	struct dirent d;
559	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	979	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
560	} u;	980	} *u;
561	struct dirent *entp;	981	struct dirent *entp;
562	char *name, *names;	982	char *name, *names;
563	int memlen = 4096;	983	int memlen = 4096;
564	int memofs = 0;	984	int memofs = 0;
565	int res = 0;	985	int res = 0;
566	int errorno;	986	int errorno;
567		987
568	if (!dirp)	988	LOCK (wrklock);
569	return -1;	989	self->dirp = dirp = opendir (req->dataptr);
570		990	self->dbuf = u = malloc (sizeof (*u));
571	names = malloc (memlen);	991	req->data2ptr = names = malloc (memlen);
		992	UNLOCK (wrklock);
		993
		994	if (dirp && u && names)
		995	for (;;)
		996	{
		997	errno = 0;
		998	readdir_r (dirp, &u->d, &entp);
		999
		1000	if (!entp)
		1001	break;
		1002
		1003	name = entp->d_name;
		1004
		1005	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		1006	{
		1007	int len = strlen (name) + 1;
		1008
		1009	res++;
		1010
		1011	while (memofs + len > memlen)
		1012	{
		1013	memlen *= 2;
		1014	LOCK (wrklock);
		1015	req->data2ptr = names = realloc (names, memlen);
		1016	UNLOCK (wrklock);
		1017
		1018	if (!names)
		1019	break;
		1020	}
		1021
		1022	memcpy (names + memofs, name, len);
		1023	memofs += len;
		1024	}
		1025	}
		1026
		1027	if (errno)
		1028	res = -1;
		1029
		1030	req->result = res;
		1031	}
		1032
		1033	/*****************************************************************************/
		1034
		1035	static void *aio_proc (void *thr_arg)
		1036	{
		1037	aio_req req;
		1038	struct timespec ts;
		1039	worker *self = (worker *)thr_arg;
		1040
		1041	/* try to distribute timeouts somewhat evenly */
		1042	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
		1043	* (1000000000UL / 1024UL);
572		1044
573	for (;;)	1045	for (;;)
574	{	1046	{
575	errno = 0, readdir_r (dirp, &u.d, &entp);	1047	ts.tv_sec = time (0) + IDLE_TIMEOUT;
576		1048
577	if (!entp)	1049	LOCK (reqlock);
578	break;
579
580	name = entp->d_name;
581
582	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
583	{
584	int len = strlen (name) + 1;
585
586	res++;
587
588	while (memofs + len > memlen)
589	{
590	memlen *= 2;
591	names = realloc (names, memlen);
592	if (!names)
593	break;
594	}
595
596	memcpy (names + memofs, name, len);
597	memofs += len;
598	}
599	}
600
601	errorno = errno;
602	closedir (dirp);
603
604	if (errorno)
605	{
606	free (names);
607	errno = errorno;
608	res = -1;
609	}
610
611	*namesp = (void *)names;
612	return res;
613	}
614
615	/*****************************************************************************/
616
617	static void *
618	aio_proc (void *thr_arg)
619	{
620	aio_req req;
621	int type;
622
623	do
624	{
625	pthread_mutex_lock (&reqlock);
626		1050
627	for (;;)	1051	for (;;)
628	{	1052	{
629	req = reqs;	1053	self->req = req = reqq_shift (&req_queue);
630
631	if (reqs)
632	{
633	reqs = reqs->next;
634	if (!reqs) reqe = 0;
635	}
636		1054
637	if (req)	1055	if (req)
638	break;	1056	break;
639		1057
		1058	++idle;
		1059
		1060	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
		1061	== ETIMEDOUT)
		1062	{
		1063	if (idle > max_idle)
		1064	{
		1065	--idle;
		1066	UNLOCK (reqlock);
		1067	LOCK (wrklock);
		1068	--started;
		1069	UNLOCK (wrklock);
		1070	goto quit;
		1071	}
		1072
		1073	/* we are allowed to idle, so do so without any timeout */
640	pthread_cond_wait (&reqwait, &reqlock);	1074	pthread_cond_wait (&reqwait, &reqlock);
		1075	ts.tv_sec = time (0) + IDLE_TIMEOUT;
		1076	}
		1077
		1078	--idle;
641	}	1079	}
642		1080
643	pthread_mutex_unlock (&reqlock);	1081	--nready;
		1082
		1083	UNLOCK (reqlock);
644		1084
645	errno = 0; /* strictly unnecessary */	1085	errno = 0; /* strictly unnecessary */
646		1086
647	type = req->type;	1087	if (!(req->flags & FLAG_CANCELLED))
648
649	switch (type)	1088	switch (req->type)
650	{	1089	{
651	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	1090	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
652	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	1091	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
653		1092
654	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	1093	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
655	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	1094	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
656		1095
657	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	1096	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
658	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	1097	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
659	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	1098	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
660		1099
661	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	1100	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
662	case REQ_CLOSE: req->result = close (req->fd); break;	1101	case REQ_CLOSE: req->result = close (req->fd); break;
663	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	1102	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
664	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	1103	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		1104	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		1105	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
665	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	1106	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		1107	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
666		1108
667	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	1109	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
668	case REQ_FSYNC: req->result = fsync (req->fd); break;	1110	case REQ_FSYNC: req->result = fsync (req->fd); break;
669	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	1111	case REQ_READDIR: scandir_ (req, self); break;
670		1112
		1113	case REQ_BUSY:
		1114	{
		1115	struct timeval tv;
		1116
		1117	tv.tv_sec = req->fd;
		1118	tv.tv_usec = req->fd2;
		1119
		1120	req->result = select (0, 0, 0, 0, &tv);
		1121	}
		1122
		1123	case REQ_GROUP:
		1124	case REQ_NOP:
		1125	break;
		1126
671	case REQ_QUIT:	1127	case REQ_QUIT:
672	break;	1128	goto quit;
673		1129
674	default:	1130	default:
675	req->result = ENOSYS;	1131	req->result = ENOSYS;
676	break;	1132	break;
677	}	1133	}
678		1134
679	req->errorno = errno;	1135	req->errorno = errno;
680		1136
681	pthread_mutex_lock (&reslock);	1137	LOCK (reslock);
682		1138
683	req->next = 0;	1139	++npending;
684		1140
685	if (rese)	1141	if (!reqq_push (&res_queue, req))
686	{
687	rese->next = req;
688	rese = req;
689	}
690	else
691	{
692	rese = ress = req;
693
694	/* write a dummy byte to the pipe so fh becomes ready */	1142	/* write a dummy byte to the pipe so fh becomes ready */
695	write (respipe [1], &respipe, 1);	1143	write (respipe [1], &respipe, 1);
696	}
697		1144
698	pthread_mutex_unlock (&reslock);	1145	self->req = 0;
		1146	worker_clear (self);
		1147
		1148	UNLOCK (reslock);
699	}	1149	}
700	while (type != REQ_QUIT);	1150
		1151	quit:
		1152	LOCK (wrklock);
		1153	worker_free (self);
		1154	UNLOCK (wrklock);
701		1155
702	return 0;	1156	return 0;
703	}	1157	}
704		1158
705	/*****************************************************************************/	1159	/*****************************************************************************/
706		1160
707	static void atfork_prepare (void)	1161	static void atfork_prepare (void)
708	{	1162	{
709	pthread_mutex_lock (&reqlock);	1163	LOCK (wrklock);
710	pthread_mutex_lock (&reslock);	1164	LOCK (reqlock);
		1165	LOCK (reslock);
711	#if !HAVE_PREADWRITE	1166	#if !HAVE_PREADWRITE
712	pthread_mutex_lock (&preadwritelock);	1167	LOCK (preadwritelock);
713	#endif	1168	#endif
714	#if !HAVE_READDIR_R	1169	#if !HAVE_READDIR_R
715	pthread_mutex_lock (&readdirlock);	1170	LOCK (readdirlock);
716	#endif	1171	#endif
717	}	1172	}
718		1173
719	static void atfork_parent (void)	1174	static void atfork_parent (void)
720	{	1175	{
721	#if !HAVE_READDIR_R	1176	#if !HAVE_READDIR_R
722	pthread_mutex_unlock (&readdirlock);	1177	UNLOCK (readdirlock);
723	#endif	1178	#endif
724	#if !HAVE_PREADWRITE	1179	#if !HAVE_PREADWRITE
725	pthread_mutex_unlock (&preadwritelock);	1180	UNLOCK (preadwritelock);
726	#endif	1181	#endif
727	pthread_mutex_unlock (&reslock);	1182	UNLOCK (reslock);
728	pthread_mutex_unlock (&reqlock);	1183	UNLOCK (reqlock);
		1184	UNLOCK (wrklock);
729	}	1185	}
730		1186
731	static void atfork_child (void)	1187	static void atfork_child (void)
732	{	1188	{
733	aio_req prv;	1189	aio_req prv;
734		1190
		1191	while (prv = reqq_shift (&req_queue))
		1192	req_free (prv);
		1193
		1194	while (prv = reqq_shift (&res_queue))
		1195	req_free (prv);
		1196
		1197	while (wrk_first.next != &wrk_first)
		1198	{
		1199	worker *wrk = wrk_first.next;
		1200
		1201	if (wrk->req)
		1202	req_free (wrk->req);
		1203
		1204	worker_clear (wrk);
		1205	worker_free (wrk);
		1206	}
		1207
735	started = 0;	1208	started = 0;
736		1209	idle = 0;
737	while (reqs)	1210	nreqs = 0;
738	{	1211	nready = 0;
739	prv = reqs;	1212	npending = 0;
740	reqs = prv->next;
741	free_req (prv);
742	}
743
744	reqs = reqe = 0;
745
746	while (ress)
747	{
748	prv = ress;
749	ress = prv->next;
750	free_req (prv);
751	}
752
753	ress = rese = 0;
754		1213
755	close (respipe [0]);	1214	close (respipe [0]);
756	close (respipe [1]);	1215	close (respipe [1]);
757	create_pipe ();	1216	create_pipe ();
758		1217
759	atfork_parent ();	1218	atfork_parent ();
760	}	1219	}
761		1220
762	#define dREQ \	1221	#define dREQ \
763	aio_req req; \	1222	aio_req req; \
		1223	int req_pri = next_pri; \
		1224	next_pri = DEFAULT_PRI + PRI_BIAS; \
764	\	1225	\
765	if (SvOK (callback) && !SvROK (callback)) \	1226	if (SvOK (callback) && !SvROK (callback)) \
766	croak ("clalback must be undef or of reference type"); \	1227	croak ("callback must be undef or of reference type"); \
767	\	1228	\
768	Newz (0, req, 1, aio_cb); \	1229	Newz (0, req, 1, aio_cb); \
769	if (!req) \	1230	if (!req) \
770	croak ("out of memory during aio_req allocation"); \	1231	croak ("out of memory during aio_req allocation"); \
771	\	1232	\
772	req->callback = newSVsv (callback);	1233	req->callback = newSVsv (callback); \
		1234	req->pri = req_pri
		1235
		1236	#define REQ_SEND \
		1237	req_send (req); \
		1238	\
		1239	if (GIMME_V != G_VOID) \
		1240	XPUSHs (req_sv (req, AIO_REQ_KLASS));
773		1241
774	MODULE = IO::AIO PACKAGE = IO::AIO	1242	MODULE = IO::AIO PACKAGE = IO::AIO
775		1243
776	PROTOTYPES: ENABLE	1244	PROTOTYPES: ENABLE
777		1245
778	BOOT:	1246	BOOT:
779	{	1247	{
		1248	HV *stash = gv_stashpv ("IO::AIO", 1);
		1249
		1250	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1251	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1252	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1253	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		1254	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		1255	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		1256
780	create_pipe ();	1257	create_pipe ();
781	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1258	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
782	}	1259	}
783		1260
784	void	1261	void
785	min_parallel(nthreads)	1262	max_poll_reqs (int nreqs)
786	int nthreads
787	PROTOTYPE: $	1263	PROTOTYPE: $
		1264	CODE:
		1265	max_poll_reqs = nreqs;
788		1266
789	void	1267	void
790	max_parallel(nthreads)	1268	max_poll_time (double nseconds)
791	int nthreads
792	PROTOTYPE: $	1269	PROTOTYPE: $
		1270	CODE:
		1271	max_poll_time = nseconds * AIO_TICKS;
		1272
		1273	void
		1274	min_parallel (int nthreads)
		1275	PROTOTYPE: $
		1276
		1277	void
		1278	max_parallel (int nthreads)
		1279	PROTOTYPE: $
		1280
		1281	void
		1282	max_idle (int nthreads)
		1283	PROTOTYPE: $
		1284	CODE:
		1285	set_max_idle (nthreads);
793		1286
794	int	1287	int
795	max_outstanding(nreqs)	1288	max_outstanding (int maxreqs)
796	int nreqs	1289	PROTOTYPE: $
797	PROTOTYPE: $
798	CODE:	1290	CODE:
799	RETVAL = max_outstanding;	1291	RETVAL = max_outstanding;
800	max_outstanding = nreqs;	1292	max_outstanding = maxreqs;
		1293	OUTPUT:
		1294	RETVAL
801		1295
802	void	1296	void
803	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1297	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
804	SV * pathname	1298	SV * pathname
805	int flags	1299	int flags
806	int mode	1300	int mode
807	SV * callback	1301	SV * callback
808	PROTOTYPE: $$$;$	1302	PROTOTYPE: $$$;$
809	CODE:	1303	PPCODE:
810	{	1304	{
811	dREQ;	1305	dREQ;
812		1306
813	req->type = REQ_OPEN;	1307	req->type = REQ_OPEN;
814	req->data = newSVsv (pathname);	1308	req->data = newSVsv (pathname);
815	req->dataptr = SvPVbyte_nolen (req->data);	1309	req->dataptr = SvPVbyte_nolen (req->data);
816	req->fd = flags;	1310	req->fd = flags;
817	req->mode = mode;	1311	req->mode = mode;
818		1312
819	send_req (req);	1313	REQ_SEND;
820	}	1314	}
821		1315
822	void	1316	void
823	aio_close(fh,callback=&PL_sv_undef)	1317	aio_close (fh,callback=&PL_sv_undef)
824	SV * fh	1318	SV * fh
825	SV * callback	1319	SV * callback
826	PROTOTYPE: $;$	1320	PROTOTYPE: $;$
827	ALIAS:	1321	ALIAS:
828	aio_close = REQ_CLOSE	1322	aio_close = REQ_CLOSE
829	aio_fsync = REQ_FSYNC	1323	aio_fsync = REQ_FSYNC
830	aio_fdatasync = REQ_FDATASYNC	1324	aio_fdatasync = REQ_FDATASYNC
831	CODE:	1325	PPCODE:
832	{	1326	{
833	dREQ;	1327	dREQ;
834		1328
835	req->type = ix;	1329	req->type = ix;
836	req->fh = newSVsv (fh);	1330	req->fh = newSVsv (fh);
837	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1331	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
838		1332
839	send_req (req);	1333	REQ_SEND (req);
840	}	1334	}
841		1335
842	void	1336	void
843	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1337	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
844	SV * fh	1338	SV * fh
845	UV offset	1339	UV offset
846	UV length	1340	UV length
847	SV * data	1341	SV * data
848	UV dataoffset	1342	UV dataoffset
849	SV * callback	1343	SV * callback
850	ALIAS:	1344	ALIAS:
851	aio_read = REQ_READ	1345	aio_read = REQ_READ
852	aio_write = REQ_WRITE	1346	aio_write = REQ_WRITE
853	PROTOTYPE: $$$$$;$	1347	PROTOTYPE: $$$$$;$
854	CODE:	1348	PPCODE:
855	{	1349	{
856	aio_req req;	1350	aio_req req;
857	STRLEN svlen;	1351	STRLEN svlen;
858	char *svptr = SvPVbyte (data, svlen);	1352	char *svptr = SvPVbyte (data, svlen);
859		1353
…		…
897	{	1391	{
898	SvREADONLY_on (data);	1392	SvREADONLY_on (data);
899	req->data2ptr = (void *)data;	1393	req->data2ptr = (void *)data;
900	}	1394	}
901		1395
902	send_req (req);	1396	REQ_SEND;
903	}	1397	}
904	}	1398	}
905		1399
906	void	1400	void
907	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1401	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
908	SV * out_fh	1402	SV * out_fh
909	SV * in_fh	1403	SV * in_fh
910	UV in_offset	1404	UV in_offset
911	UV length	1405	UV length
912	SV * callback	1406	SV * callback
913	PROTOTYPE: $$$$;$	1407	PROTOTYPE: $$$$;$
914	CODE:	1408	PPCODE:
915	{	1409	{
916	dREQ;	1410	dREQ;
917		1411
918	req->type = REQ_SENDFILE;	1412	req->type = REQ_SENDFILE;
919	req->fh = newSVsv (out_fh);	1413	req->fh = newSVsv (out_fh);
…		…
921	req->fh2 = newSVsv (in_fh);	1415	req->fh2 = newSVsv (in_fh);
922	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1416	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
923	req->offset = in_offset;	1417	req->offset = in_offset;
924	req->length = length;	1418	req->length = length;
925		1419
926	send_req (req);	1420	REQ_SEND;
927	}	1421	}
928		1422
929	void	1423	void
930	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1424	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
931	SV * fh	1425	SV * fh
932	UV offset	1426	UV offset
933	IV length	1427	IV length
934	SV * callback	1428	SV * callback
935	PROTOTYPE: $$$;$	1429	PROTOTYPE: $$$;$
936	CODE:	1430	PPCODE:
937	{	1431	{
938	dREQ;	1432	dREQ;
939		1433
940	req->type = REQ_READAHEAD;	1434	req->type = REQ_READAHEAD;
941	req->fh = newSVsv (fh);	1435	req->fh = newSVsv (fh);
942	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1436	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
943	req->offset = offset;	1437	req->offset = offset;
944	req->length = length;	1438	req->length = length;
945		1439
946	send_req (req);	1440	REQ_SEND;
947	}	1441	}
948		1442
949	void	1443	void
950	aio_stat(fh_or_path,callback=&PL_sv_undef)	1444	aio_stat (fh_or_path,callback=&PL_sv_undef)
951	SV * fh_or_path	1445	SV * fh_or_path
952	SV * callback	1446	SV * callback
953	ALIAS:	1447	ALIAS:
954	aio_stat = REQ_STAT	1448	aio_stat = REQ_STAT
955	aio_lstat = REQ_LSTAT	1449	aio_lstat = REQ_LSTAT
956	CODE:	1450	PPCODE:
957	{	1451	{
958	dREQ;	1452	dREQ;
959		1453
960	New (0, req->statdata, 1, Stat_t);	1454	New (0, req->statdata, 1, Stat_t);
961	if (!req->statdata)	1455	if (!req->statdata)
962	{	1456	{
963	free_req (req);	1457	req_free (req);
964	croak ("out of memory during aio_req->statdata allocation");	1458	croak ("out of memory during aio_req->statdata allocation");
965	}	1459	}
966		1460
967	if (SvPOK (fh_or_path))	1461	if (SvPOK (fh_or_path))
968	{	1462	{
…		…
975	req->type = REQ_FSTAT;	1469	req->type = REQ_FSTAT;
976	req->fh = newSVsv (fh_or_path);	1470	req->fh = newSVsv (fh_or_path);
977	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1471	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
978	}	1472	}
979		1473
980	send_req (req);	1474	REQ_SEND;
981	}	1475	}
982		1476
983	void	1477	void
984	aio_unlink(pathname,callback=&PL_sv_undef)	1478	aio_unlink (pathname,callback=&PL_sv_undef)
985	SV * pathname	1479	SV * pathname
986	SV * callback	1480	SV * callback
987	ALIAS:	1481	ALIAS:
988	aio_unlink = REQ_UNLINK	1482	aio_unlink = REQ_UNLINK
989	aio_rmdir = REQ_RMDIR	1483	aio_rmdir = REQ_RMDIR
		1484	aio_readdir = REQ_READDIR
990	CODE:	1485	PPCODE:
991	{	1486	{
992	dREQ;	1487	dREQ;
993		1488
994	req->type = ix;	1489	req->type = ix;
995	req->data = newSVsv (pathname);	1490	req->data = newSVsv (pathname);
996	req->dataptr = SvPVbyte_nolen (req->data);	1491	req->dataptr = SvPVbyte_nolen (req->data);
997		1492
998	send_req (req);	1493	REQ_SEND;
999	}	1494	}
1000		1495
1001	void	1496	void
1002	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1497	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1003	SV * oldpath	1498	SV * oldpath
1004	SV * newpath	1499	SV * newpath
1005	SV * callback	1500	SV * callback
		1501	ALIAS:
		1502	aio_link = REQ_LINK
		1503	aio_symlink = REQ_SYMLINK
		1504	aio_rename = REQ_RENAME
1006	CODE:	1505	PPCODE:
1007	{	1506	{
1008	dREQ;	1507	dREQ;
1009		1508
1010	req->type = REQ_SYMLINK;	1509	req->type = ix;
1011	req->fh = newSVsv (oldpath);	1510	req->fh = newSVsv (oldpath);
1012	req->data2ptr = SvPVbyte_nolen (req->fh);	1511	req->data2ptr = SvPVbyte_nolen (req->fh);
1013	req->data = newSVsv (newpath);	1512	req->data = newSVsv (newpath);
1014	req->dataptr = SvPVbyte_nolen (req->data);	1513	req->dataptr = SvPVbyte_nolen (req->data);
1015		1514
1016	send_req (req);	1515	REQ_SEND;
1017	}	1516	}
1018		1517
1019	void	1518	void
1020	aio_readdir(pathname,callback=&PL_sv_undef)	1519	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)
1021	SV * pathname	1520	SV * pathname
1022	SV * callback	1521	SV * callback
		1522	UV mode
		1523	UV dev
1023	CODE:	1524	PPCODE:
1024	{	1525	{
1025	dREQ;	1526	dREQ;
1026		1527
1027	req->type = REQ_READDIR;	1528	req->type = REQ_MKNOD;
1028	req->data = newSVsv (pathname);	1529	req->data = newSVsv (pathname);
1029	req->dataptr = SvPVbyte_nolen (req->data);	1530	req->dataptr = SvPVbyte_nolen (req->data);
		1531	req->mode = (mode_t)mode;
		1532	req->offset = dev;
1030		1533
1031	send_req (req);	1534	REQ_SEND;
1032	}	1535	}
1033		1536
1034	void	1537	void
		1538	aio_busy (delay,callback=&PL_sv_undef)
		1539	double delay
		1540	SV * callback
		1541	PPCODE:
		1542	{
		1543	dREQ;
		1544
		1545	req->type = REQ_BUSY;
		1546	req->fd = delay < 0. ? 0 : delay;
		1547	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1548
		1549	REQ_SEND;
		1550	}
		1551
		1552	void
		1553	aio_group (callback=&PL_sv_undef)
		1554	SV * callback
		1555	PROTOTYPE: ;$
		1556	PPCODE:
		1557	{
		1558	dREQ;
		1559
		1560	req->type = REQ_GROUP;
		1561	req_send (req);
		1562
		1563	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1564	}
		1565
		1566	void
		1567	aio_nop (callback=&PL_sv_undef)
		1568	SV * callback
		1569	PPCODE:
		1570	{
		1571	dREQ;
		1572
		1573	req->type = REQ_NOP;
		1574
		1575	REQ_SEND;
		1576	}
		1577
		1578	int
		1579	aioreq_pri (int pri = 0)
		1580	PROTOTYPE: ;$
		1581	CODE:
		1582	RETVAL = next_pri - PRI_BIAS;
		1583	if (items > 0)
		1584	{
		1585	if (pri < PRI_MIN) pri = PRI_MIN;
		1586	if (pri > PRI_MAX) pri = PRI_MAX;
		1587	next_pri = pri + PRI_BIAS;
		1588	}
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	void
		1593	aioreq_nice (int nice = 0)
		1594	CODE:
		1595	nice = next_pri - nice;
		1596	if (nice < PRI_MIN) nice = PRI_MIN;
		1597	if (nice > PRI_MAX) nice = PRI_MAX;
		1598	next_pri = nice + PRI_BIAS;
		1599
		1600	void
1035	flush()	1601	flush ()
1036	PROTOTYPE:	1602	PROTOTYPE:
1037	CODE:	1603	CODE:
1038	while (nreqs)	1604	while (nreqs)
1039	{	1605	{
1040	poll_wait ();	1606	poll_wait ();
1041	poll_cb ();	1607	poll_cb (0);
1042	}	1608	}
1043		1609
1044	void	1610	void
1045	poll()	1611	poll()
1046	PROTOTYPE:	1612	PROTOTYPE:
1047	CODE:	1613	CODE:
1048	if (nreqs)	1614	if (nreqs)
1049	{	1615	{
1050	poll_wait ();	1616	poll_wait ();
1051	poll_cb ();	1617	poll_cb (0);
1052	}	1618	}
1053		1619
1054	int	1620	int
1055	poll_fileno()	1621	poll_fileno()
1056	PROTOTYPE:	1622	PROTOTYPE:
…		…
1080	CODE:	1646	CODE:
1081	RETVAL = nreqs;	1647	RETVAL = nreqs;
1082	OUTPUT:	1648	OUTPUT:
1083	RETVAL	1649	RETVAL
1084		1650
		1651	int
		1652	nready()
		1653	PROTOTYPE:
		1654	CODE:
		1655	RETVAL = get_nready ();
		1656	OUTPUT:
		1657	RETVAL
		1658
		1659	int
		1660	npending()
		1661	PROTOTYPE:
		1662	CODE:
		1663	RETVAL = get_npending ();
		1664	OUTPUT:
		1665	RETVAL
		1666
		1667	int
		1668	nthreads()
		1669	PROTOTYPE:
		1670	CODE:
		1671	if (WORDACCESS_UNSAFE) LOCK (wrklock);
		1672	RETVAL = started;
		1673	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
		1674	OUTPUT:
		1675	RETVAL
		1676
		1677	PROTOTYPES: DISABLE
		1678
		1679	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1680
		1681	void
		1682	cancel (aio_req_ornot req)
		1683	CODE:
		1684	req_cancel (req);
		1685
		1686	void
		1687	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1688	CODE:
		1689	SvREFCNT_dec (req->callback);
		1690	req->callback = newSVsv (callback);
		1691
		1692	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1693
		1694	void
		1695	add (aio_req grp, ...)
		1696	PPCODE:
		1697	{
		1698	int i;
		1699	aio_req req;
		1700
		1701	if (grp->fd == 2)
		1702	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1703
		1704	for (i = 1; i < items; ++i )
		1705	{
		1706	if (GIMME_V != G_VOID)
		1707	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1708
		1709	req = SvAIO_REQ (ST (i));
		1710
		1711	if (req)
		1712	{
		1713	++grp->length;
		1714	req->grp = grp;
		1715
		1716	req->grp_prev = 0;
		1717	req->grp_next = grp->grp_first;
		1718
		1719	if (grp->grp_first)
		1720	grp->grp_first->grp_prev = req;
		1721
		1722	grp->grp_first = req;
		1723	}
		1724	}
		1725	}
		1726
		1727	void
		1728	cancel_subs (aio_req_ornot req)
		1729	CODE:
		1730	req_cancel_subs (req);
		1731
		1732	void
		1733	result (aio_req grp, ...)
		1734	CODE:
		1735	{
		1736	int i;
		1737	AV *av;
		1738
		1739	grp->errorno = errno;
		1740
		1741	av = newAV ();
		1742
		1743	for (i = 1; i < items; ++i )
		1744	av_push (av, newSVsv (ST (i)));
		1745
		1746	SvREFCNT_dec (grp->data);
		1747	grp->data = (SV *)av;
		1748	}
		1749
		1750	void
		1751	errno (aio_req grp, int errorno = errno)
		1752	CODE:
		1753	grp->errorno = errorno;
		1754
		1755	void
		1756	limit (aio_req grp, int limit)
		1757	CODE:
		1758	grp->fd2 = limit;
		1759	aio_grp_feed (grp);
		1760
		1761	void
		1762	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1763	CODE:
		1764	{
		1765	SvREFCNT_dec (grp->fh2);
		1766	grp->fh2 = newSVsv (callback);
		1767
		1768	if (grp->fd2 <= 0)
		1769	grp->fd2 = 2;
		1770
		1771	aio_grp_feed (grp);
		1772	}
		1773

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