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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.21 by root, Sun Aug 7 03:26:10 2005 UTC vs.
Revision 1.75 by root, Thu Oct 26 06:44:48 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux
		5	# define _GNU_SOURCE
		6	#endif
		7
1	#define _REENTRANT 1	8	#define _REENTRANT 1
		9
2	#include <errno.h>	10	#include <errno.h>
3		11
4	#include "EXTERN.h"	12	#include "EXTERN.h"
5	#include "perl.h"	13	#include "perl.h"
6	#include "XSUB.h"	14	#include "XSUB.h"
7		15
8	#include "autoconf/config.h"	16	#include "autoconf/config.h"
9		17
		18	#include <pthread.h>
		19
		20	#include <stddef.h>
		21	#include <errno.h>
		22	#include <sys/time.h>
		23	#include <sys/select.h>
10	#include <sys/types.h>	24	#include <sys/types.h>
11	#include <sys/stat.h>	25	#include <sys/stat.h>
12		26	#include <limits.h>
13	#include <unistd.h>	27	#include <unistd.h>
14	#include <fcntl.h>	28	#include <fcntl.h>
15	#include <signal.h>	29	#include <signal.h>
16	#include <sched.h>	30	#include <sched.h>
17		31
18	#include <pthread.h>	32	#if HAVE_SENDFILE
		33	# if __linux
		34	# include <sys/sendfile.h>
		35	# elif __freebsd
		36	# include <sys/socket.h>
		37	# include <sys/uio.h>
		38	# elif __hpux
		39	# include <sys/socket.h>
		40	# elif __solaris /* not yet */
		41	# include <sys/sendfile.h>
		42	# else
		43	# error sendfile support requested but not available
		44	# endif
		45	#endif
19		46
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	47	/* used for struct dirent, AIX doesn't provide it */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	48	#ifndef NAME_MAX
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	49	# define NAME_MAX 4096
		50	#endif
		51
		52	#ifndef PTHREAD_STACK_MIN
		53	/* care for broken platforms, e.g. windows */
		54	# define PTHREAD_STACK_MIN 16384
		55	#endif
23		56
24	#if __ia64	57	#if __ia64
25	# define STACKSIZE 65536	58	# define STACKSIZE 65536
		59	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		60	# define STACKSIZE PTHREAD_STACK_MIN
26	#else	61	#else
27	# define STACKSIZE 4096	62	# define STACKSIZE 16384
28	#endif	63	#endif
		64
		65	/* buffer size for various temporary buffers */
		66	#define AIO_BUFSIZE 65536
		67
		68	#define dBUF \
		69	char *aio_buf; \
		70	LOCK (wrklock); \
		71	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		72	UNLOCK (wrklock); \
		73	if (!aio_buf) \
		74	return -1;
29		75
30	enum {	76	enum {
31	REQ_QUIT,	77	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	78	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	79	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		80	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	81	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	82	REQ_FSYNC, REQ_FDATASYNC,
		83	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
		84	REQ_READDIR,
		85	REQ_LINK, REQ_SYMLINK,
		86	REQ_GROUP, REQ_NOP,
		87	REQ_BUSY,
36	};	88	};
37		89
		90	#define AIO_REQ_KLASS "IO::AIO::REQ"
		91	#define AIO_GRP_KLASS "IO::AIO::GRP"
		92
38	typedef struct aio_cb {	93	typedef struct aio_cb
		94	{
39	struct aio_cb *volatile next;	95	struct aio_cb *volatile next;
40		96
41	int type;	97	SV *data, *callback;
42		98	SV *fh, *fh2;
43	int fd;	99	void *dataptr, *data2ptr;
		100	Stat_t *statdata;
44	off_t offset;	101	off_t offset;
45	size_t length;	102	size_t length;
46	ssize_t result;	103	ssize_t result;
		104
		105	STRLEN dataoffset;
		106	int type;
		107	int fd, fd2;
		108	int errorno;
47	mode_t mode; /* open */	109	mode_t mode; /* open */
48	int errorno;
49	SV *data, *callback, *fh;
50	void *dataptr;
51	STRLEN dataoffset;
52		110
53	Stat_t *statdata;	111	unsigned char flags;
		112	unsigned char pri;
		113
		114	SV *self; /* the perl counterpart of this request, if any */
		115	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54	} aio_cb;	116	} aio_cb;
55		117
		118	enum {
		119	FLAG_CANCELLED = 0x01,
		120	};
		121
56	typedef aio_cb *aio_req;	122	typedef aio_cb *aio_req;
		123	typedef aio_cb *aio_req_ornot;
57		124
		125	enum {
		126	PRI_MIN = -4,
		127	PRI_MAX = 4,
		128
		129	DEFAULT_PRI = 0,
		130	PRI_BIAS = -PRI_MIN,
		131	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		132	};
		133
		134	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		135
58	static int started;	136	static int started, wanted;
59	static volatile int nreqs;	137	static volatile int nreqs;
60	static int max_outstanding = 1<<30;
61	static int respipe [2];	138	static int respipe [2];
62		139
		140	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		141	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		142	#else
		143	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		144	#endif
		145
		146	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		147	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		148
		149	/* worker threasd management */
		150	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		151
		152	typedef struct worker {
		153	/* locked by wrklock */
		154	struct worker *prev, *next;
		155
		156	pthread_t tid;
		157
		158	/* locked by reslock, reqlock or wrklock */
		159	aio_req req; /* currently processed request */
		160	void *dbuf;
		161	DIR *dirp;
		162	} worker;
		163
		164	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		165
		166	static void worker_clear (worker *wrk)
		167	{
		168	if (wrk->dirp)
		169	{
		170	closedir (wrk->dirp);
		171	wrk->dirp = 0;
		172	}
		173
		174	if (wrk->dbuf)
		175	{
		176	free (wrk->dbuf);
		177	wrk->dbuf = 0;
		178	}
		179	}
		180
		181	static void worker_free (worker *wrk)
		182	{
		183	wrk->next->prev = wrk->prev;
		184	wrk->prev->next = wrk->next;
		185
		186	free (wrk);
		187	}
		188
63	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	189	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
64	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	190	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
65	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	191	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66		192
67	static volatile aio_req reqs, reqe; /* queue start, queue end */	193	/*
68	static volatile aio_req ress, rese; /* queue start, queue end */	194	* a somewhat faster data structure might be nice, but
		195	* with 8 priorities this actually needs <20 insns
		196	* per shift, the most expensive operation.
		197	*/
		198	typedef struct {
		199	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		200	int size;
		201	} reqq;
69		202
70	static void	203	static reqq req_queue;
71	poll_wait ()	204	static reqq res_queue;
		205
		206	int reqq_push (reqq *q, aio_req req)
72	{	207	{
73	if (nreqs && !ress)	208	int pri = req->pri;
		209	req->next = 0;
		210
		211	if (q->qe[pri])
		212	{
		213	q->qe[pri]->next = req;
		214	q->qe[pri] = req;
74	{	215	}
		216	else
		217	q->qe[pri] = q->qs[pri] = req;
		218
		219	return q->size++;
		220	}
		221
		222	aio_req reqq_shift (reqq *q)
		223	{
		224	int pri;
		225
		226	if (!q->size)
		227	return 0;
		228
		229	--q->size;
		230
		231	for (pri = NUM_PRI; pri--; )
		232	{
		233	aio_req req = q->qs[pri];
		234
		235	if (req)
		236	{
		237	if (!(q->qs[pri] = req->next))
		238	q->qe[pri] = 0;
		239
		240	return req;
		241	}
		242	}
		243
		244	abort ();
		245	}
		246
		247	static int poll_cb ();
		248	static void req_invoke (aio_req req);
		249	static void req_free (aio_req req);
		250	static void req_cancel (aio_req req);
		251
		252	/* must be called at most once */
		253	static SV *req_sv (aio_req req, const char *klass)
		254	{
		255	if (!req->self)
		256	{
		257	req->self = (SV *)newHV ();
		258	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		259	}
		260
		261	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		262	}
		263
		264	static aio_req SvAIO_REQ (SV *sv)
		265	{
		266	MAGIC *mg;
		267
		268	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		269	croak ("object of class " AIO_REQ_KLASS " expected");
		270
		271	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		272
		273	return mg ? (aio_req)mg->mg_ptr : 0;
		274	}
		275
		276	static void aio_grp_feed (aio_req grp)
		277	{
		278	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		279	{
		280	int old_len = grp->length;
		281
		282	if (grp->fh2 && SvOK (grp->fh2))
		283	{
		284	dSP;
		285
		286	ENTER;
		287	SAVETMPS;
		288	PUSHMARK (SP);
		289	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		290	PUTBACK;
		291	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		292	SPAGAIN;
		293	FREETMPS;
		294	LEAVE;
		295	}
		296
		297	/* stop if no progress has been made */
		298	if (old_len == grp->length)
		299	{
		300	SvREFCNT_dec (grp->fh2);
		301	grp->fh2 = 0;
		302	break;
		303	}
		304	}
		305	}
		306
		307	static void aio_grp_dec (aio_req grp)
		308	{
		309	--grp->length;
		310
		311	/* call feeder, if applicable */
		312	aio_grp_feed (grp);
		313
		314	/* finish, if done */
		315	if (!grp->length && grp->fd)
		316	{
		317	req_invoke (grp);
		318	req_free (grp);
		319	}
		320	}
		321
		322	static void poll_wait ()
		323	{
75	fd_set rfd;	324	fd_set rfd;
		325
		326	while (nreqs)
		327	{
		328	int size;
		329	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		330	LOCK (reslock);
		331	#endif
		332	size = res_queue.size;
		333	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		334	UNLOCK (reslock);
		335	#endif
		336
		337	if (size)
		338	return;
		339
76	FD_ZERO(&rfd);	340	FD_ZERO(&rfd);
77	FD_SET(respipe [0], &rfd);	341	FD_SET(respipe [0], &rfd);
78		342
79	select (respipe [0] + 1, &rfd, 0, 0, 0);	343	select (respipe [0] + 1, &rfd, 0, 0, 0);
80	}	344	}
81	}	345	}
82		346
83	static int	347	static void req_invoke (aio_req req)
84	poll_cb ()	348	{
		349	dSP;
		350
		351	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		352	{
		353	errno = req->errorno;
		354
		355	ENTER;
		356	SAVETMPS;
		357	PUSHMARK (SP);
		358	EXTEND (SP, 1);
		359
		360	switch (req->type)
		361	{
		362	case REQ_READDIR:
		363	{
		364	SV *rv = &PL_sv_undef;
		365
		366	if (req->result >= 0)
		367	{
		368	int i;
		369	char *buf = req->data2ptr;
		370	AV *av = newAV ();
		371
		372	av_extend (av, req->result - 1);
		373
		374	for (i = 0; i < req->result; ++i)
		375	{
		376	SV *sv = newSVpv (buf, 0);
		377
		378	av_store (av, i, sv);
		379	buf += SvCUR (sv) + 1;
		380	}
		381
		382	rv = sv_2mortal (newRV_noinc ((SV *)av));
		383	}
		384
		385	PUSHs (rv);
		386	}
		387	break;
		388
		389	case REQ_OPEN:
		390	{
		391	/* convert fd to fh */
		392	SV *fh;
		393
		394	PUSHs (sv_2mortal (newSViv (req->result)));
		395	PUTBACK;
		396	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		397	SPAGAIN;
		398
		399	fh = SvREFCNT_inc (POPs);
		400
		401	PUSHMARK (SP);
		402	XPUSHs (sv_2mortal (fh));
		403	}
		404	break;
		405
		406	case REQ_GROUP:
		407	req->fd = 2; /* mark group as finished */
		408
		409	if (req->data)
		410	{
		411	int i;
		412	AV *av = (AV *)req->data;
		413
		414	EXTEND (SP, AvFILL (av) + 1);
		415	for (i = 0; i <= AvFILL (av); ++i)
		416	PUSHs (*av_fetch (av, i, 0));
		417	}
		418	break;
		419
		420	case REQ_NOP:
		421	case REQ_BUSY:
		422	break;
		423
		424	default:
		425	PUSHs (sv_2mortal (newSViv (req->result)));
		426	break;
		427	}
		428
		429
		430	PUTBACK;
		431	call_sv (req->callback, G_VOID | G_EVAL);
		432	SPAGAIN;
		433
		434	FREETMPS;
		435	LEAVE;
		436	}
		437
		438	if (req->grp)
		439	{
		440	aio_req grp = req->grp;
		441
		442	/* unlink request */
		443	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		444	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		445
		446	if (grp->grp_first == req)
		447	grp->grp_first = req->grp_next;
		448
		449	aio_grp_dec (grp);
		450	}
		451
		452	if (SvTRUE (ERRSV))
		453	{
		454	req_free (req);
		455	croak (0);
		456	}
		457	}
		458
		459	static void req_free (aio_req req)
		460	{
		461	if (req->self)
		462	{
		463	sv_unmagic (req->self, PERL_MAGIC_ext);
		464	SvREFCNT_dec (req->self);
		465	}
		466
		467	SvREFCNT_dec (req->data);
		468	SvREFCNT_dec (req->fh);
		469	SvREFCNT_dec (req->fh2);
		470	SvREFCNT_dec (req->callback);
		471	Safefree (req->statdata);
		472
		473	if (req->type == REQ_READDIR)
		474	free (req->data2ptr);
		475
		476	Safefree (req);
		477	}
		478
		479	static void req_cancel_subs (aio_req grp)
		480	{
		481	aio_req sub;
		482
		483	if (grp->type != REQ_GROUP)
		484	return;
		485
		486	SvREFCNT_dec (grp->fh2);
		487	grp->fh2 = 0;
		488
		489	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		490	req_cancel (sub);
		491	}
		492
		493	static void req_cancel (aio_req req)
		494	{
		495	req->flags |= FLAG_CANCELLED;
		496
		497	req_cancel_subs (req);
		498	}
		499
		500	static int poll_cb ()
85	{	501	{
86	dSP;	502	dSP;
87	int count = 0;	503	int count = 0;
		504	int do_croak = 0;
88	aio_req req, prv;	505	aio_req req;
89		506
90	pthread_mutex_lock (&reslock);	507	for (;;)
91
92	{	508	{
		509	LOCK (reslock);
		510	req = reqq_shift (&res_queue);
		511
		512	if (req)
		513	{
		514	if (!res_queue.size)
		515	{
93	/* read any signals sent by the worker threads */	516	/* read any signals sent by the worker threads */
94	char buf [32];	517	char buf [32];
95	while (read (respipe [0], buf, 32) > 0)	518	while (read (respipe [0], buf, 32) == 32)
		519	;
		520	}
96	;	521	}
97	}
98		522
99	req = ress;	523	UNLOCK (reslock);
100	ress = rese = 0;
101		524
102	pthread_mutex_unlock (&reslock);	525	if (!req)
		526	break;
103		527
104	while (req)
105	{
106	nreqs--;	528	--nreqs;
107		529
108	if (req->type == REQ_QUIT)	530	if (req->type == REQ_QUIT)
109	started--;	531	started--;
		532	else if (req->type == REQ_GROUP && req->length)
		533	{
		534	req->fd = 1; /* mark request as delayed */
		535	continue;
		536	}
110	else	537	else
111	{	538	{
112	int errorno = errno;
113	errno = req->errorno;
114
115	if (req->type == REQ_READ)	539	if (req->type == REQ_READ)
116	SvCUR_set (req->data, req->dataoffset	540	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
117	+ req->result > 0 ? req->result : 0);
118		541
		542	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		543	SvREADONLY_off (req->data);
		544
119	if (req->data)	545	if (req->statdata)
120	SvREFCNT_dec (req->data);
121
122	if (req->fh)
123	SvREFCNT_dec (req->fh);
124
125	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
126	{	546	{
127	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	547	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
128	PL_laststatval = req->result;	548	PL_laststatval = req->result;
129	PL_statcache = *(req->statdata);	549	PL_statcache = *(req->statdata);
130
131	Safefree (req->statdata);
132	}	550	}
133		551
134	ENTER;	552	req_invoke (req);
135	PUSHMARK (SP);
136	XPUSHs (sv_2mortal (newSViv (req->result)));
137		553
138	if (req->type == REQ_OPEN)
139	{
140	/* convert fd to fh */
141	SV *fh;
142
143	PUTBACK;
144	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
145	SPAGAIN;
146
147	fh = SvREFCNT_inc (POPs);
148
149	PUSHMARK (SP);
150	XPUSHs (sv_2mortal (fh));
151	}
152
153	if (SvOK (req->callback))
154	{
155	PUTBACK;
156	call_sv (req->callback, G_VOID | G_EVAL);
157	SPAGAIN;
158	}
159
160	LEAVE;
161
162	if (req->callback)
163	SvREFCNT_dec (req->callback);
164
165	errno = errorno;
166	count++;	554	count++;
167	}	555	}
168		556
169	prv = req;
170	req = req->next;
171	Safefree (prv);	557	req_free (req);
172
173	/* TODO: croak on errors? */
174	}	558	}
175		559
176	return count;	560	return count;
177	}	561	}
178		562
179	static void *aio_proc(void *arg);	563	static void *aio_proc(void *arg);
180		564
181	static void
182	start_thread (void)	565	static void start_thread (void)
183	{	566	{
184	sigset_t fullsigset, oldsigset;	567	sigset_t fullsigset, oldsigset;
185	pthread_t tid;
186	pthread_attr_t attr;	568	pthread_attr_t attr;
		569
		570	worker *wrk = calloc (1, sizeof (worker));
		571
		572	if (!wrk)
		573	croak ("unable to allocate worker thread data");
187		574
188	pthread_attr_init (&attr);	575	pthread_attr_init (&attr);
189	pthread_attr_setstacksize (&attr, STACKSIZE);	576	pthread_attr_setstacksize (&attr, STACKSIZE);
190	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	577	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
191		578
192	sigfillset (&fullsigset);	579	sigfillset (&fullsigset);
		580
		581	LOCK (wrklock);
193	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	582	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
194		583
195	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	584	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		585	{
		586	wrk->prev = &wrk_first;
		587	wrk->next = wrk_first.next;
		588	wrk_first.next->prev = wrk;
		589	wrk_first.next = wrk;
196	started++;	590	started++;
		591	}
		592	else
		593	free (wrk);
197		594
198	sigprocmask (SIG_SETMASK, &oldsigset, 0);	595	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		596	UNLOCK (wrklock);
199	}	597	}
200		598
201	static void	599	static void req_send (aio_req req)
202	send_req (aio_req req)
203	{	600	{
		601	while (started < wanted && nreqs >= started)
		602	start_thread ();
		603
204	nreqs++;	604	++nreqs;
205		605
206	pthread_mutex_lock (&reqlock);	606	LOCK (reqlock);
207		607	reqq_push (&req_queue, req);
208	req->next = 0;
209
210	if (reqe)
211	{
212	reqe->next = req;
213	reqe = req;
214	}
215	else
216	reqe = reqs = req;
217
218	pthread_cond_signal (&reqwait);	608	pthread_cond_signal (&reqwait);
219	pthread_mutex_unlock (&reqlock);	609	UNLOCK (reqlock);
		610	}
220		611
221	while (nreqs > max_outstanding)	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	req_send (req);
		622	}
		623
		624	static void min_parallel (int nthreads)
		625	{
		626	if (wanted < nthreads)
		627	wanted = nthreads;
		628	}
		629
		630	static void max_parallel (int nthreads)
		631	{
		632	int cur = started;
		633
		634	if (wanted > nthreads)
		635	wanted = nthreads;
		636
		637	while (cur > wanted)
		638	{
		639	end_thread ();
		640	cur--;
		641	}
		642
		643	while (started > wanted)
222	{	644	{
223	poll_wait ();	645	poll_wait ();
224	poll_cb ();	646	poll_cb ();
225	}	647	}
226	}	648	}
227		649
228	static void	650	static void create_pipe ()
229	end_thread (void)
230	{	651	{
231	aio_req req;	652	if (pipe (respipe))
232	New (0, req, 1, aio_cb);	653	croak ("unable to initialize result pipe");
233	req->type = REQ_QUIT;
234		654
235	send_req (req);	655	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
236	}	656	croak ("cannot set result pipe to nonblocking mode");
237		657
		658	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		659	croak ("cannot set result pipe to nonblocking mode");
		660	}
		661
		662	/*****************************************************************************/
238	/* work around various missing functions */	663	/* work around various missing functions */
239		664
240	#if !HAVE_PREADWRITE	665	#if !HAVE_PREADWRITE
241	# define pread aio_pread	666	# define pread aio_pread
242	# define pwrite aio_pwrite	667	# define pwrite aio_pwrite
…		…
244	/*	669	/*
245	* make our pread/pwrite safe against themselves, but not against	670	* make our pread/pwrite safe against themselves, but not against
246	* normal read/write by using a mutex. slows down execution a lot,	671	* normal read/write by using a mutex. slows down execution a lot,
247	* but that's your problem, not mine.	672	* but that's your problem, not mine.
248	*/	673	*/
249	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	674	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
250		675
251	static ssize_t	676	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
252	pread (int fd, void *buf, size_t count, off_t offset)
253	{	677	{
254	ssize_t res;	678	ssize_t res;
255	off_t ooffset;	679	off_t ooffset;
256		680
257	pthread_mutex_lock (&iolock);	681	LOCK (preadwritelock);
258	ooffset = lseek (fd, 0, SEEK_CUR);	682	ooffset = lseek (fd, 0, SEEK_CUR);
259	lseek (fd, offset, SEEK_SET);	683	lseek (fd, offset, SEEK_SET);
260	res = read (fd, buf, count);	684	res = read (fd, buf, count);
261	lseek (fd, ooffset, SEEK_SET);	685	lseek (fd, ooffset, SEEK_SET);
262	pthread_mutex_unlock (&iolock);	686	UNLOCK (preadwritelock);
263		687
264	return res;	688	return res;
265	}	689	}
266		690
267	static ssize_t
268	pwrite (int fd, void *buf, size_t count, off_t offset)	691	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
269	{	692	{
270	ssize_t res;	693	ssize_t res;
271	off_t ooffset;	694	off_t ooffset;
272		695
273	pthread_mutex_lock (&iolock);	696	LOCK (preadwritelock);
274	ooffset = lseek (fd, 0, SEEK_CUR);	697	ooffset = lseek (fd, 0, SEEK_CUR);
275	lseek (fd, offset, SEEK_SET);	698	lseek (fd, offset, SEEK_SET);
276	res = write (fd, buf, count);	699	res = write (fd, buf, count);
277	lseek (fd, offset, SEEK_SET);	700	lseek (fd, offset, SEEK_SET);
278	pthread_mutex_unlock (&iolock);	701	UNLOCK (preadwritelock);
279		702
280	return res;	703	return res;
281	}	704	}
282	#endif	705	#endif
283		706
284	#if !HAVE_FDATASYNC	707	#if !HAVE_FDATASYNC
285	# define fdatasync fsync	708	# define fdatasync fsync
286	#endif	709	#endif
287		710
288	#if !HAVE_READAHEAD	711	#if !HAVE_READAHEAD
289	# define readahead aio_readahead	712	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
290		713
291	static char readahead_buf[4096];	714	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
292
293	static ssize_t
294	readahead (int fd, off_t offset, size_t count)
295	{	715	{
		716	dBUF;
		717
296	while (count > 0)	718	while (count > 0)
297	{	719	{
298	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	720	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
299		721
300	pread (fd, readahead_buf, len, offset);	722	pread (fd, aio_buf, len, offset);
301	offset += len;	723	offset += len;
302	count -= len;	724	count -= len;
303	}	725	}
304		726
305	errno = 0;	727	errno = 0;
306	}	728	}
		729
		730	#endif
		731
		732	#if !HAVE_READDIR_R
		733	# define readdir_r aio_readdir_r
		734
		735	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		736
		737	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		738	{
		739	struct dirent *e;
		740	int errorno;
		741
		742	LOCK (readdirlock);
		743
		744	e = readdir (dirp);
		745	errorno = errno;
		746
		747	if (e)
		748	{
		749	*res = ent;
		750	strcpy (ent->d_name, e->d_name);
		751	}
		752	else
		753	*res = 0;
		754
		755	UNLOCK (readdirlock);
		756
		757	errno = errorno;
		758	return e ? 0 : -1;
		759	}
		760	#endif
		761
		762	/* sendfile always needs emulation */
		763	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		764	{
		765	ssize_t res;
		766
		767	if (!count)
		768	return 0;
		769
		770	#if HAVE_SENDFILE
		771	# if __linux
		772	res = sendfile (ofd, ifd, &offset, count);
		773
		774	# elif __freebsd
		775	/*
		776	* Of course, the freebsd sendfile is a dire hack with no thoughts
		777	* wasted on making it similar to other I/O functions.
		778	*/
		779	{
		780	off_t sbytes;
		781	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		782
		783	if (res < 0 && sbytes)
		784	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		785	res = sbytes;
		786	}
		787
		788	# elif __hpux
		789	res = sendfile (ofd, ifd, offset, count, 0, 0);
		790
		791	# elif __solaris
		792	{
		793	struct sendfilevec vec;
		794	size_t sbytes;
		795
		796	vec.sfv_fd = ifd;
		797	vec.sfv_flag = 0;
		798	vec.sfv_off = offset;
		799	vec.sfv_len = count;
		800
		801	res = sendfilev (ofd, &vec, 1, &sbytes);
		802
		803	if (res < 0 && sbytes)
		804	res = sbytes;
		805	}
		806
307	#endif	807	# endif
		808	#else
		809	res = -1;
		810	errno = ENOSYS;
		811	#endif
308		812
309	static void *	813	if (res < 0
		814	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		815	#if __solaris
		816	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		817	#endif
		818	)
		819	)
		820	{
		821	/* emulate sendfile. this is a major pain in the ass */
		822	dBUF;
		823
		824	res = 0;
		825
		826	while (count)
		827	{
		828	ssize_t cnt;
		829
		830	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		831
		832	if (cnt <= 0)
		833	{
		834	if (cnt && !res) res = -1;
		835	break;
		836	}
		837
		838	cnt = write (ofd, aio_buf, cnt);
		839
		840	if (cnt <= 0)
		841	{
		842	if (cnt && !res) res = -1;
		843	break;
		844	}
		845
		846	offset += cnt;
		847	res += cnt;
		848	count -= cnt;
		849	}
		850	}
		851
		852	return res;
		853	}
		854
		855	/* read a full directory */
		856	static void scandir_ (aio_req req, worker *self)
		857	{
		858	DIR *dirp;
		859	union
		860	{
		861	struct dirent d;
		862	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		863	} *u;
		864	struct dirent *entp;
		865	char *name, *names;
		866	int memlen = 4096;
		867	int memofs = 0;
		868	int res = 0;
		869	int errorno;
		870
		871	LOCK (wrklock);
		872	self->dirp = dirp = opendir (req->dataptr);
		873	self->dbuf = u = malloc (sizeof (*u));
		874	UNLOCK (wrklock);
		875
		876	req->data2ptr = names = malloc (memlen);
		877
		878	if (dirp && u && names)
		879	for (;;)
		880	{
		881	errno = 0;
		882	readdir_r (dirp, &u->d, &entp);
		883
		884	if (!entp)
		885	break;
		886
		887	name = entp->d_name;
		888
		889	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		890	{
		891	int len = strlen (name) + 1;
		892
		893	res++;
		894
		895	while (memofs + len > memlen)
		896	{
		897	memlen *= 2;
		898	LOCK (wrklock);
		899	req->data2ptr = names = realloc (names, memlen);
		900	UNLOCK (wrklock);
		901
		902	if (!names)
		903	break;
		904	}
		905
		906	memcpy (names + memofs, name, len);
		907	memofs += len;
		908	}
		909	}
		910
		911	if (errno)
		912	res = -1;
		913
		914	req->result = res;
		915	}
		916
		917	/*****************************************************************************/
		918
310	aio_proc (void *thr_arg)	919	static void *aio_proc (void *thr_arg)
311	{	920	{
312	aio_req req;	921	aio_req req;
313	int type;	922	int type;
		923	worker *self = (worker *)thr_arg;
314		924
315	do	925	do
316	{	926	{
317	pthread_mutex_lock (&reqlock);	927	LOCK (reqlock);
318		928
319	for (;;)	929	for (;;)
320	{	930	{
321	req = reqs;	931	self->req = req = reqq_shift (&req_queue);
322
323	if (reqs)
324	{
325	reqs = reqs->next;
326	if (!reqs) reqe = 0;
327	}
328		932
329	if (req)	933	if (req)
330	break;	934	break;
331		935
332	pthread_cond_wait (&reqwait, &reqlock);	936	pthread_cond_wait (&reqwait, &reqlock);
333	}	937	}
334		938
335	pthread_mutex_unlock (&reqlock);	939	UNLOCK (reqlock);
336		940
337	errno = 0; /* strictly unnecessary */	941	errno = 0; /* strictly unnecessary */
		942	type = req->type; /* remember type for QUIT check */
338		943
339	type = req->type;	944	if (!(req->flags & FLAG_CANCELLED))
340
341	switch (type)	945	switch (type)
342	{	946	{
343	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	947	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
344	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
345		949
346	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	950	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
		951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
347		952
348	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
349	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
350	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
351		956
352	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	957	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
353	case REQ_CLOSE: req->result = close (req->fd); break;	958	case REQ_CLOSE: req->result = close (req->fd); break;
354	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		960	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		961	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
		963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
355		964
356	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
357	case REQ_FSYNC: req->result = fsync (req->fd); break;	966	case REQ_FSYNC: req->result = fsync (req->fd); break;
		967	case REQ_READDIR: scandir_ (req, self); break;
358		968
		969	case REQ_BUSY:
		970	{
		971	struct timeval tv;
		972
		973	tv.tv_sec = req->fd;
		974	tv.tv_usec = req->fd2;
		975
		976	req->result = select (0, 0, 0, 0, &tv);
		977	}
		978
		979	case REQ_GROUP:
		980	case REQ_NOP:
359	case REQ_QUIT:	981	case REQ_QUIT:
360	break;	982	break;
361		983
362	default:	984	default:
363	req->result = ENOSYS;	985	req->result = ENOSYS;
364	break;	986	break;
365	}	987	}
366		988
367	req->errorno = errno;	989	req->errorno = errno;
368		990
369	pthread_mutex_lock (&reslock);	991	LOCK (reslock);
370		992
371	req->next = 0;	993	if (!reqq_push (&res_queue, req))
372
373	if (rese)
374	{
375	rese->next = req;
376	rese = req;
377	}
378	else
379	{
380	rese = ress = req;
381
382	/* write a dummy byte to the pipe so fh becomes ready */	994	/* write a dummy byte to the pipe so fh becomes ready */
383	write (respipe [1], &respipe, 1);	995	write (respipe [1], &respipe, 1);
384	}
385		996
386	pthread_mutex_unlock (&reslock);	997	self->req = 0;
		998	worker_clear (self);
		999
		1000	UNLOCK (reslock);
387	}	1001	}
388	while (type != REQ_QUIT);	1002	while (type != REQ_QUIT);
389		1003
		1004	LOCK (wrklock);
		1005	worker_free (self);
		1006	UNLOCK (wrklock);
		1007
390	return 0;	1008	return 0;
391	}	1009	}
392		1010
		1011	/*****************************************************************************/
		1012
		1013	static void atfork_prepare (void)
		1014	{
		1015	LOCK (wrklock);
		1016	LOCK (reqlock);
		1017	LOCK (reslock);
		1018	#if !HAVE_PREADWRITE
		1019	LOCK (preadwritelock);
		1020	#endif
		1021	#if !HAVE_READDIR_R
		1022	LOCK (readdirlock);
		1023	#endif
		1024	}
		1025
		1026	static void atfork_parent (void)
		1027	{
		1028	#if !HAVE_READDIR_R
		1029	UNLOCK (readdirlock);
		1030	#endif
		1031	#if !HAVE_PREADWRITE
		1032	UNLOCK (preadwritelock);
		1033	#endif
		1034	UNLOCK (reslock);
		1035	UNLOCK (reqlock);
		1036	UNLOCK (wrklock);
		1037	}
		1038
		1039	static void atfork_child (void)
		1040	{
		1041	aio_req prv;
		1042
		1043	while (prv = reqq_shift (&req_queue))
		1044	req_free (prv);
		1045
		1046	while (prv = reqq_shift (&res_queue))
		1047	req_free (prv);
		1048
		1049	while (wrk_first.next != &wrk_first)
		1050	{
		1051	worker *wrk = wrk_first.next;
		1052
		1053	if (wrk->req)
		1054	req_free (wrk->req);
		1055
		1056	worker_clear (wrk);
		1057	worker_free (wrk);
		1058	}
		1059
		1060	started = 0;
		1061	nreqs = 0;
		1062
		1063	close (respipe [0]);
		1064	close (respipe [1]);
		1065	create_pipe ();
		1066
		1067	atfork_parent ();
		1068	}
		1069
		1070	#define dREQ \
		1071	aio_req req; \
		1072	int req_pri = next_pri; \
		1073	next_pri = DEFAULT_PRI + PRI_BIAS; \
		1074	\
		1075	if (SvOK (callback) && !SvROK (callback)) \
		1076	croak ("callback must be undef or of reference type"); \
		1077	\
		1078	Newz (0, req, 1, aio_cb); \
		1079	if (!req) \
		1080	croak ("out of memory during aio_req allocation"); \
		1081	\
		1082	req->callback = newSVsv (callback); \
		1083	req->pri = req_pri
		1084
		1085	#define REQ_SEND \
		1086	req_send (req); \
		1087	\
		1088	if (GIMME_V != G_VOID) \
		1089	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		1090
393	MODULE = IO::AIO PACKAGE = IO::AIO	1091	MODULE = IO::AIO PACKAGE = IO::AIO
394		1092
395	PROTOTYPES: ENABLE	1093	PROTOTYPES: ENABLE
396		1094
397	BOOT:	1095	BOOT:
398	{	1096	{
399	if (pipe (respipe))	1097	HV *stash = gv_stashpv ("IO::AIO", 1);
400	croak ("unable to initialize result pipe");	1098	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1099	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1100	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
401		1101
402	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1102	create_pipe ();
403	croak ("cannot set result pipe to nonblocking mode");	1103	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
404
405	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
406	croak ("cannot set result pipe to nonblocking mode");
407	}	1104	}
408		1105
409	void	1106	void
410	min_parallel(nthreads)	1107	min_parallel (nthreads)
411	int nthreads	1108	int nthreads
412	PROTOTYPE: $	1109	PROTOTYPE: $
413	CODE:
414	while (nthreads > started)
415	start_thread ();
416		1110
417	void	1111	void
418	max_parallel(nthreads)	1112	max_parallel (nthreads)
419	int nthreads	1113	int nthreads
420	PROTOTYPE: $	1114	PROTOTYPE: $
421	CODE:
422	{
423	int cur = started;
424	while (cur > nthreads)
425	{
426	end_thread ();
427	cur--;
428	}
429		1115
430	while (started > nthreads)
431	{
432	poll_wait ();
433	poll_cb ();
434	}
435	}
436
437	int
438	max_outstanding(nreqs)
439	int nreqs
440	PROTOTYPE: $
441	CODE:
442	RETVAL = max_outstanding;
443	max_outstanding = nreqs;
444
445	void	1116	void
446	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
447	SV * pathname	1118	SV * pathname
448	int flags	1119	int flags
449	int mode	1120	int mode
450	SV * callback	1121	SV * callback
451	PROTOTYPE: $$$;$	1122	PROTOTYPE: $$$;$
452	CODE:	1123	PPCODE:
453	{	1124	{
454	aio_req req;	1125	dREQ;
455
456	Newz (0, req, 1, aio_cb);
457
458	if (!req)
459	croak ("out of memory during aio_req allocation");
460		1126
461	req->type = REQ_OPEN;	1127	req->type = REQ_OPEN;
462	req->data = newSVsv (pathname);	1128	req->data = newSVsv (pathname);
463	req->dataptr = SvPV_nolen (req->data);	1129	req->dataptr = SvPVbyte_nolen (req->data);
464	req->fd = flags;	1130	req->fd = flags;
465	req->mode = mode;	1131	req->mode = mode;
466	req->callback = SvREFCNT_inc (callback);
467		1132
468	send_req (req);	1133	REQ_SEND;
469	}	1134	}
470		1135
471	void	1136	void
472	aio_close(fh,callback=&PL_sv_undef)	1137	aio_close (fh,callback=&PL_sv_undef)
473	SV * fh	1138	SV * fh
474	SV * callback	1139	SV * callback
475	PROTOTYPE: $;$	1140	PROTOTYPE: $;$
476	ALIAS:	1141	ALIAS:
477	aio_close = REQ_CLOSE	1142	aio_close = REQ_CLOSE
478	aio_fsync = REQ_FSYNC	1143	aio_fsync = REQ_FSYNC
479	aio_fdatasync = REQ_FDATASYNC	1144	aio_fdatasync = REQ_FDATASYNC
480	CODE:	1145	PPCODE:
481	{	1146	{
482	aio_req req;	1147	dREQ;
483
484	Newz (0, req, 1, aio_cb);
485
486	if (!req)
487	croak ("out of memory during aio_req allocation");
488		1148
489	req->type = ix;	1149	req->type = ix;
490	req->fh = newSVsv (fh);	1150	req->fh = newSVsv (fh);
491	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
492	req->callback = SvREFCNT_inc (callback);
493		1152
494	send_req (req);	1153	REQ_SEND (req);
495	}	1154	}
496		1155
497	void	1156	void
498	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
499	SV * fh	1158	SV * fh
500	UV offset	1159	UV offset
501	IV length	1160	UV length
502	SV * data	1161	SV * data
503	IV dataoffset	1162	UV dataoffset
504	SV * callback	1163	SV * callback
505	ALIAS:	1164	ALIAS:
506	aio_read = REQ_READ	1165	aio_read = REQ_READ
507	aio_write = REQ_WRITE	1166	aio_write = REQ_WRITE
508	PROTOTYPE: $$$$$;$	1167	PROTOTYPE: $$$$$;$
509	CODE:	1168	PPCODE:
510	{	1169	{
511	aio_req req;	1170	aio_req req;
512	STRLEN svlen;	1171	STRLEN svlen;
513	char *svptr = SvPVbyte (data, svlen);	1172	char *svptr = SvPVbyte (data, svlen);
514		1173
…		…
534	}	1193	}
535		1194
536	if (length < 0)	1195	if (length < 0)
537	croak ("length must not be negative");	1196	croak ("length must not be negative");
538		1197
539	Newz (0, req, 1, aio_cb);	1198	{
		1199	dREQ;
540		1200
541	if (!req)
542	croak ("out of memory during aio_req allocation");
543
544	req->type = ix;	1201	req->type = ix;
545	req->fh = newSVsv (fh);	1202	req->fh = newSVsv (fh);
546	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1203	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
547	: IoOFP (sv_2io (fh)));	1204	: IoOFP (sv_2io (fh)));
548	req->offset = offset;	1205	req->offset = offset;
		1206	req->length = length;
		1207	req->data = SvREFCNT_inc (data);
		1208	req->dataptr = (char *)svptr + dataoffset;
		1209
		1210	if (!SvREADONLY (data))
		1211	{
		1212	SvREADONLY_on (data);
		1213	req->data2ptr = (void *)data;
		1214	}
		1215
		1216	REQ_SEND;
		1217	}
		1218	}
		1219
		1220	void
		1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1222	SV * out_fh
		1223	SV * in_fh
		1224	UV in_offset
		1225	UV length
		1226	SV * callback
		1227	PROTOTYPE: $$$$;$
		1228	PPCODE:
		1229	{
		1230	dREQ;
		1231
		1232	req->type = REQ_SENDFILE;
		1233	req->fh = newSVsv (out_fh);
		1234	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1235	req->fh2 = newSVsv (in_fh);
		1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1237	req->offset = in_offset;
549	req->length = length;	1238	req->length = length;
550	req->data = SvREFCNT_inc (data);
551	req->dataptr = (char *)svptr + dataoffset;
552	req->callback = SvREFCNT_inc (callback);
553		1239
554	send_req (req);	1240	REQ_SEND;
555	}	1241	}
556		1242
557	void	1243	void
558	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
559	SV * fh	1245	SV * fh
560	UV offset	1246	UV offset
561	IV length	1247	IV length
562	SV * callback	1248	SV * callback
563	PROTOTYPE: $$$;$	1249	PROTOTYPE: $$$;$
564	CODE:	1250	PPCODE:
565	{	1251	{
566	aio_req req;	1252	dREQ;
567
568	if (length < 0)
569	croak ("length must not be negative");
570
571	Newz (0, req, 1, aio_cb);
572
573	if (!req)
574	croak ("out of memory during aio_req allocation");
575		1253
576	req->type = REQ_READAHEAD;	1254	req->type = REQ_READAHEAD;
577	req->fh = newSVsv (fh);	1255	req->fh = newSVsv (fh);
578	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
579	req->offset = offset;	1257	req->offset = offset;
580	req->length = length;	1258	req->length = length;
581	req->callback = SvREFCNT_inc (callback);
582		1259
583	send_req (req);	1260	REQ_SEND;
584	}	1261	}
585		1262
586	void	1263	void
587	aio_stat(fh_or_path,callback=&PL_sv_undef)	1264	aio_stat (fh_or_path,callback=&PL_sv_undef)
588	SV * fh_or_path	1265	SV * fh_or_path
589	SV * callback	1266	SV * callback
590	ALIAS:	1267	ALIAS:
591	aio_stat = REQ_STAT	1268	aio_stat = REQ_STAT
592	aio_lstat = REQ_LSTAT	1269	aio_lstat = REQ_LSTAT
593	CODE:	1270	PPCODE:
594	{	1271	{
595	aio_req req;	1272	dREQ;
596
597	Newz (0, req, 1, aio_cb);
598
599	if (!req)
600	croak ("out of memory during aio_req allocation");
601		1273
602	New (0, req->statdata, 1, Stat_t);	1274	New (0, req->statdata, 1, Stat_t);
603
604	if (!req->statdata)	1275	if (!req->statdata)
		1276	{
		1277	req_free (req);
605	croak ("out of memory during aio_req->statdata allocation");	1278	croak ("out of memory during aio_req->statdata allocation");
		1279	}
606		1280
607	if (SvPOK (fh_or_path))	1281	if (SvPOK (fh_or_path))
608	{	1282	{
609	req->type = ix;	1283	req->type = ix;
610	req->data = newSVsv (fh_or_path);	1284	req->data = newSVsv (fh_or_path);
611	req->dataptr = SvPV_nolen (req->data);	1285	req->dataptr = SvPVbyte_nolen (req->data);
612	}	1286	}
613	else	1287	else
614	{	1288	{
615	req->type = REQ_FSTAT;	1289	req->type = REQ_FSTAT;
616	req->fh = newSVsv (fh_or_path);	1290	req->fh = newSVsv (fh_or_path);
617	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
618	}	1292	}
619		1293
620	req->callback = SvREFCNT_inc (callback);	1294	REQ_SEND;
621
622	send_req (req);
623	}	1295	}
624		1296
625	void	1297	void
626	aio_unlink(pathname,callback=&PL_sv_undef)	1298	aio_unlink (pathname,callback=&PL_sv_undef)
627	SV * pathname	1299	SV * pathname
628	SV * callback	1300	SV * callback
		1301	ALIAS:
		1302	aio_unlink = REQ_UNLINK
		1303	aio_rmdir = REQ_RMDIR
		1304	aio_readdir = REQ_READDIR
629	CODE:	1305	PPCODE:
630	{	1306	{
631	aio_req req;	1307	dREQ;
632		1308
633	Newz (0, req, 1, aio_cb);	1309	req->type = ix;
		1310	req->data = newSVsv (pathname);
		1311	req->dataptr = SvPVbyte_nolen (req->data);
634		1312
635	if (!req)	1313	REQ_SEND;
636	croak ("out of memory during aio_req allocation");	1314	}
		1315
		1316	void
		1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1318	SV * oldpath
		1319	SV * newpath
		1320	SV * callback
		1321	ALIAS:
		1322	aio_link = REQ_LINK
		1323	aio_symlink = REQ_SYMLINK
		1324	aio_rename = REQ_RENAME
		1325	PPCODE:
		1326	{
		1327	dREQ;
637		1328
638	req->type = REQ_UNLINK;	1329	req->type = ix;
		1330	req->fh = newSVsv (oldpath);
		1331	req->data2ptr = SvPVbyte_nolen (req->fh);
639	req->data = newSVsv (pathname);	1332	req->data = newSVsv (newpath);
640	req->dataptr = SvPV_nolen (req->data);	1333	req->dataptr = SvPVbyte_nolen (req->data);
641	req->callback = SvREFCNT_inc (callback);
642		1334
643	send_req (req);	1335	REQ_SEND;
644	}	1336	}
645		1337
646	void	1338	void
		1339	aio_busy (delay,callback=&PL_sv_undef)
		1340	double delay
		1341	SV * callback
		1342	PPCODE:
		1343	{
		1344	dREQ;
		1345
		1346	req->type = REQ_BUSY;
		1347	req->fd = delay < 0. ? 0 : delay;
		1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1349
		1350	REQ_SEND;
		1351	}
		1352
		1353	void
		1354	aio_group (callback=&PL_sv_undef)
		1355	SV * callback
		1356	PROTOTYPE: ;$
		1357	PPCODE:
		1358	{
		1359	dREQ;
		1360
		1361	req->type = REQ_GROUP;
		1362	req_send (req);
		1363
		1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1365	}
		1366
		1367	void
		1368	aio_nop (callback=&PL_sv_undef)
		1369	SV * callback
		1370	PPCODE:
		1371	{
		1372	dREQ;
		1373
		1374	req->type = REQ_NOP;
		1375
		1376	REQ_SEND;
		1377	}
		1378
		1379	void
		1380	aioreq_pri (int pri = DEFAULT_PRI)
		1381	CODE:
		1382	if (pri < PRI_MIN) pri = PRI_MIN;
		1383	if (pri > PRI_MAX) pri = PRI_MAX;
		1384	next_pri = pri + PRI_BIAS;
		1385
		1386	void
		1387	aioreq_nice (int nice = 0)
		1388	CODE:
		1389	nice = next_pri - nice;
		1390	if (nice < PRI_MIN) nice = PRI_MIN;
		1391	if (nice > PRI_MAX) nice = PRI_MAX;
		1392	next_pri = nice + PRI_BIAS;
		1393
		1394	void
647	flush()	1395	flush ()
648	PROTOTYPE:	1396	PROTOTYPE:
649	CODE:	1397	CODE:
650	while (nreqs)	1398	while (nreqs)
651	{	1399	{
652	poll_wait ();	1400	poll_wait ();
…		…
692	CODE:	1440	CODE:
693	RETVAL = nreqs;	1441	RETVAL = nreqs;
694	OUTPUT:	1442	OUTPUT:
695	RETVAL	1443	RETVAL
696		1444
		1445	PROTOTYPES: DISABLE
		1446
		1447	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1448
		1449	void
		1450	cancel (aio_req_ornot req)
		1451	CODE:
		1452	req_cancel (req);
		1453
		1454	void
		1455	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1456	CODE:
		1457	SvREFCNT_dec (req->callback);
		1458	req->callback = newSVsv (callback);
		1459
		1460	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1461
		1462	void
		1463	add (aio_req grp, ...)
		1464	PPCODE:
		1465	{
		1466	int i;
		1467	aio_req req;
		1468
		1469	if (grp->fd == 2)
		1470	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1471
		1472	for (i = 1; i < items; ++i )
		1473	{
		1474	if (GIMME_V != G_VOID)
		1475	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1476
		1477	req = SvAIO_REQ (ST (i));
		1478
		1479	if (req)
		1480	{
		1481	++grp->length;
		1482	req->grp = grp;
		1483
		1484	req->grp_prev = 0;
		1485	req->grp_next = grp->grp_first;
		1486
		1487	if (grp->grp_first)
		1488	grp->grp_first->grp_prev = req;
		1489
		1490	grp->grp_first = req;
		1491	}
		1492	}
		1493	}
		1494
		1495	void
		1496	cancel_subs (aio_req_ornot req)
		1497	CODE:
		1498	req_cancel_subs (req);
		1499
		1500	void
		1501	result (aio_req grp, ...)
		1502	CODE:
		1503	{
		1504	int i;
		1505	AV *av = newAV ();
		1506
		1507	for (i = 1; i < items; ++i )
		1508	av_push (av, newSVsv (ST (i)));
		1509
		1510	SvREFCNT_dec (grp->data);
		1511	grp->data = (SV *)av;
		1512	}
		1513
		1514	void
		1515	limit (aio_req grp, int limit)
		1516	CODE:
		1517	grp->fd2 = limit;
		1518	aio_grp_feed (grp);
		1519
		1520	void
		1521	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1522	CODE:
		1523	{
		1524	SvREFCNT_dec (grp->fh2);
		1525	grp->fh2 = newSVsv (callback);
		1526
		1527	if (grp->fd2 <= 0)
		1528	grp->fd2 = 2;
		1529
		1530	aio_grp_feed (grp);
		1531	}
		1532

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