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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.16 by root, Sun Jul 31 18:20:07 2005 UTC vs.
Revision 1.74 by root, Wed Oct 25 17:57:30 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	#define _REENTRANT 1
		9
		10	#include <errno.h>
		11
1	#include "EXTERN.h"	12	#include "EXTERN.h"
2	#include "perl.h"	13	#include "perl.h"
3	#include "XSUB.h"	14	#include "XSUB.h"
4		15
5	#include "autoconf/config.h"	16	#include "autoconf/config.h"
6		17
		18	#include <pthread.h>
		19
		20	#include <stddef.h>
		21	#include <errno.h>
		22	#include <sys/time.h>
		23	#include <sys/select.h>
7	#include <sys/types.h>	24	#include <sys/types.h>
8	#include <sys/stat.h>	25	#include <sys/stat.h>
9		26	#include <limits.h>
10	#include <unistd.h>	27	#include <unistd.h>
11	#include <fcntl.h>	28	#include <fcntl.h>
12	#include <signal.h>	29	#include <signal.h>
13	#include <sched.h>	30	#include <sched.h>
14		31
15	#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
16		46
17	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	47	/* used for struct dirent, AIX doesn't provide it */
18	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	48	#ifndef NAME_MAX
19	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	49	# define NAME_MAX 4096
		50	#endif
20		51
21	#if __ia64	52	#if __ia64
22	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
23	#else	56	#else
24	# define STACKSIZE 4096	57	# define STACKSIZE 16384
25	#endif	58	#endif
		59
		60	/* buffer size for various temporary buffers */
		61	#define AIO_BUFSIZE 65536
		62
		63	#define dBUF \
		64	char *aio_buf; \
		65	LOCK (wrklock); \
		66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		67	UNLOCK (wrklock); \
		68	if (!aio_buf) \
		69	return -1;
26		70
27	enum {	71	enum {
28	REQ_QUIT,	72	REQ_QUIT,
29	REQ_OPEN, REQ_CLOSE,	73	REQ_OPEN, REQ_CLOSE,
30	REQ_READ, REQ_WRITE, REQ_READAHEAD,	74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		75	REQ_SENDFILE,
31	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
32	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
		78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
		79	REQ_READDIR,
		80	REQ_LINK, REQ_SYMLINK,
		81	REQ_GROUP, REQ_NOP,
		82	REQ_BUSY,
33	};	83	};
34		84
		85	#define AIO_REQ_KLASS "IO::AIO::REQ"
		86	#define AIO_GRP_KLASS "IO::AIO::GRP"
		87
35	typedef struct aio_cb {	88	typedef struct aio_cb
		89	{
36	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
37		91
38	int type;	92	SV *data, *callback;
39		93	SV *fh, *fh2;
40	int fd;	94	void *dataptr, *data2ptr;
		95	Stat_t *statdata;
41	off_t offset;	96	off_t offset;
42	size_t length;	97	size_t length;
43	ssize_t result;	98	ssize_t result;
		99
		100	STRLEN dataoffset;
		101	int type;
		102	int fd, fd2;
		103	int errorno;
44	mode_t mode; /* open */	104	mode_t mode; /* open */
45	int errorno;
46	SV *data, *callback, *fh;
47	void *dataptr;
48	STRLEN dataoffset;
49		105
50	Stat_t *statdata;	106	unsigned char flags;
		107	unsigned char pri;
		108
		109	SV *self; /* the perl counterpart of this request, if any */
		110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
51	} aio_cb;	111	} aio_cb;
52		112
		113	enum {
		114	FLAG_CANCELLED = 0x01,
		115	};
		116
53	typedef aio_cb *aio_req;	117	typedef aio_cb *aio_req;
		118	typedef aio_cb *aio_req_ornot;
54		119
		120	enum {
		121	PRI_MIN = -4,
		122	PRI_MAX = 4,
		123
		124	DEFAULT_PRI = 0,
		125	PRI_BIAS = -PRI_MIN,
		126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		127	};
		128
		129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		130
55	static int started;	131	static int started, wanted;
56	static volatile int nreqs;	132	static volatile int nreqs;
57	static int max_outstanding = 1<<30;
58	static int respipe [2];	133	static int respipe [2];
59		134
		135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		137	#else
		138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		139	#endif
		140
		141	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		142	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		143
		144	/* worker threasd management */
		145	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		146
		147	typedef struct worker {
		148	/* locked by wrklock */
		149	struct worker *prev, *next;
		150
		151	pthread_t tid;
		152
		153	/* locked by reslock, reqlock or wrklock */
		154	aio_req req; /* currently processed request */
		155	void *dbuf;
		156	DIR *dirp;
		157	} worker;
		158
		159	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		160
		161	static void worker_clear (worker *wrk)
		162	{
		163	if (wrk->dirp)
		164	{
		165	closedir (wrk->dirp);
		166	wrk->dirp = 0;
		167	}
		168
		169	if (wrk->dbuf)
		170	{
		171	free (wrk->dbuf);
		172	wrk->dbuf = 0;
		173	}
		174	}
		175
		176	static void worker_free (worker *wrk)
		177	{
		178	wrk->next->prev = wrk->prev;
		179	wrk->prev->next = wrk->next;
		180
		181	free (wrk);
		182	}
		183
60	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
61	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
62	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
63		187
64	static volatile aio_req reqs, reqe; /* queue start, queue end */	188	/*
65	static volatile aio_req ress, rese; /* queue start, queue end */	189	* a somewhat faster data structure might be nice, but
		190	* with 8 priorities this actually needs <20 insns
		191	* per shift, the most expensive operation.
		192	*/
		193	typedef struct {
		194	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		195	int size;
		196	} reqq;
66		197
67	static void	198	static reqq req_queue;
68	poll_wait ()	199	static reqq res_queue;
		200
		201	int reqq_push (reqq *q, aio_req req)
69	{	202	{
70	if (nreqs && !ress)	203	int pri = req->pri;
		204	req->next = 0;
		205
		206	if (q->qe[pri])
		207	{
		208	q->qe[pri]->next = req;
		209	q->qe[pri] = req;
71	{	210	}
		211	else
		212	q->qe[pri] = q->qs[pri] = req;
		213
		214	return q->size++;
		215	}
		216
		217	aio_req reqq_shift (reqq *q)
		218	{
		219	int pri;
		220
		221	if (!q->size)
		222	return 0;
		223
		224	--q->size;
		225
		226	for (pri = NUM_PRI; pri--; )
		227	{
		228	aio_req req = q->qs[pri];
		229
		230	if (req)
		231	{
		232	if (!(q->qs[pri] = req->next))
		233	q->qe[pri] = 0;
		234
		235	return req;
		236	}
		237	}
		238
		239	abort ();
		240	}
		241
		242	static int poll_cb ();
		243	static void req_invoke (aio_req req);
		244	static void req_free (aio_req req);
		245	static void req_cancel (aio_req req);
		246
		247	/* must be called at most once */
		248	static SV *req_sv (aio_req req, const char *klass)
		249	{
		250	if (!req->self)
		251	{
		252	req->self = (SV *)newHV ();
		253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		254	}
		255
		256	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		257	}
		258
		259	static aio_req SvAIO_REQ (SV *sv)
		260	{
		261	MAGIC *mg;
		262
		263	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		264	croak ("object of class " AIO_REQ_KLASS " expected");
		265
		266	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		267
		268	return mg ? (aio_req)mg->mg_ptr : 0;
		269	}
		270
		271	static void aio_grp_feed (aio_req grp)
		272	{
		273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		274	{
		275	int old_len = grp->length;
		276
		277	if (grp->fh2 && SvOK (grp->fh2))
		278	{
		279	dSP;
		280
		281	ENTER;
		282	SAVETMPS;
		283	PUSHMARK (SP);
		284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		285	PUTBACK;
		286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		287	SPAGAIN;
		288	FREETMPS;
		289	LEAVE;
		290	}
		291
		292	/* stop if no progress has been made */
		293	if (old_len == grp->length)
		294	{
		295	SvREFCNT_dec (grp->fh2);
		296	grp->fh2 = 0;
		297	break;
		298	}
		299	}
		300	}
		301
		302	static void aio_grp_dec (aio_req grp)
		303	{
		304	--grp->length;
		305
		306	/* call feeder, if applicable */
		307	aio_grp_feed (grp);
		308
		309	/* finish, if done */
		310	if (!grp->length && grp->fd)
		311	{
		312	req_invoke (grp);
		313	req_free (grp);
		314	}
		315	}
		316
		317	static void poll_wait ()
		318	{
72	fd_set rfd;	319	fd_set rfd;
		320
		321	while (nreqs)
		322	{
		323	int size;
		324	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		325	LOCK (reslock);
		326	#endif
		327	size = res_queue.size;
		328	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		329	UNLOCK (reslock);
		330	#endif
		331
		332	if (size)
		333	return;
		334
73	FD_ZERO(&rfd);	335	FD_ZERO(&rfd);
74	FD_SET(respipe [0], &rfd);	336	FD_SET(respipe [0], &rfd);
75		337
76	select (respipe [0] + 1, &rfd, 0, 0, 0);	338	select (respipe [0] + 1, &rfd, 0, 0, 0);
77	}	339	}
78	}	340	}
79		341
80	static int	342	static void req_invoke (aio_req req)
81	poll_cb ()	343	{
		344	dSP;
		345
		346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		347	{
		348	errno = req->errorno;
		349
		350	ENTER;
		351	SAVETMPS;
		352	PUSHMARK (SP);
		353	EXTEND (SP, 1);
		354
		355	switch (req->type)
		356	{
		357	case REQ_READDIR:
		358	{
		359	SV *rv = &PL_sv_undef;
		360
		361	if (req->result >= 0)
		362	{
		363	int i;
		364	char *buf = req->data2ptr;
		365	AV *av = newAV ();
		366
		367	av_extend (av, req->result - 1);
		368
		369	for (i = 0; i < req->result; ++i)
		370	{
		371	SV *sv = newSVpv (buf, 0);
		372
		373	av_store (av, i, sv);
		374	buf += SvCUR (sv) + 1;
		375	}
		376
		377	rv = sv_2mortal (newRV_noinc ((SV *)av));
		378	}
		379
		380	PUSHs (rv);
		381	}
		382	break;
		383
		384	case REQ_OPEN:
		385	{
		386	/* convert fd to fh */
		387	SV *fh;
		388
		389	PUSHs (sv_2mortal (newSViv (req->result)));
		390	PUTBACK;
		391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		392	SPAGAIN;
		393
		394	fh = SvREFCNT_inc (POPs);
		395
		396	PUSHMARK (SP);
		397	XPUSHs (sv_2mortal (fh));
		398	}
		399	break;
		400
		401	case REQ_GROUP:
		402	req->fd = 2; /* mark group as finished */
		403
		404	if (req->data)
		405	{
		406	int i;
		407	AV *av = (AV *)req->data;
		408
		409	EXTEND (SP, AvFILL (av) + 1);
		410	for (i = 0; i <= AvFILL (av); ++i)
		411	PUSHs (*av_fetch (av, i, 0));
		412	}
		413	break;
		414
		415	case REQ_NOP:
		416	case REQ_BUSY:
		417	break;
		418
		419	default:
		420	PUSHs (sv_2mortal (newSViv (req->result)));
		421	break;
		422	}
		423
		424
		425	PUTBACK;
		426	call_sv (req->callback, G_VOID | G_EVAL);
		427	SPAGAIN;
		428
		429	FREETMPS;
		430	LEAVE;
		431	}
		432
		433	if (req->grp)
		434	{
		435	aio_req grp = req->grp;
		436
		437	/* unlink request */
		438	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		439	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		440
		441	if (grp->grp_first == req)
		442	grp->grp_first = req->grp_next;
		443
		444	aio_grp_dec (grp);
		445	}
		446
		447	if (SvTRUE (ERRSV))
		448	{
		449	req_free (req);
		450	croak (0);
		451	}
		452	}
		453
		454	static void req_free (aio_req req)
		455	{
		456	if (req->self)
		457	{
		458	sv_unmagic (req->self, PERL_MAGIC_ext);
		459	SvREFCNT_dec (req->self);
		460	}
		461
		462	SvREFCNT_dec (req->data);
		463	SvREFCNT_dec (req->fh);
		464	SvREFCNT_dec (req->fh2);
		465	SvREFCNT_dec (req->callback);
		466	Safefree (req->statdata);
		467
		468	if (req->type == REQ_READDIR)
		469	free (req->data2ptr);
		470
		471	Safefree (req);
		472	}
		473
		474	static void req_cancel_subs (aio_req grp)
		475	{
		476	aio_req sub;
		477
		478	if (grp->type != REQ_GROUP)
		479	return;
		480
		481	SvREFCNT_dec (grp->fh2);
		482	grp->fh2 = 0;
		483
		484	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		485	req_cancel (sub);
		486	}
		487
		488	static void req_cancel (aio_req req)
		489	{
		490	req->flags |= FLAG_CANCELLED;
		491
		492	req_cancel_subs (req);
		493	}
		494
		495	static int poll_cb ()
82	{	496	{
83	dSP;	497	dSP;
84	int count = 0;	498	int count = 0;
		499	int do_croak = 0;
85	aio_req req, prv;	500	aio_req req;
86		501
87	pthread_mutex_lock (&reslock);	502	for (;;)
88
89	{	503	{
		504	LOCK (reslock);
		505	req = reqq_shift (&res_queue);
		506
		507	if (req)
		508	{
		509	if (!res_queue.size)
		510	{
90	/* read any signals sent by the worker threads */	511	/* read any signals sent by the worker threads */
91	char buf [32];	512	char buf [32];
92	while (read (respipe [0], buf, 32) > 0)	513	while (read (respipe [0], buf, 32) == 32)
		514	;
		515	}
93	;	516	}
94	}
95		517
96	req = ress;	518	UNLOCK (reslock);
97	ress = rese = 0;
98		519
99	pthread_mutex_unlock (&reslock);	520	if (!req)
		521	break;
100		522
101	while (req)
102	{
103	nreqs--;	523	--nreqs;
104		524
105	if (req->type == REQ_QUIT)	525	if (req->type == REQ_QUIT)
106	started--;	526	started--;
		527	else if (req->type == REQ_GROUP && req->length)
		528	{
		529	req->fd = 1; /* mark request as delayed */
		530	continue;
		531	}
107	else	532	else
108	{	533	{
109	int errorno = errno;
110	errno = req->errorno;
111
112	if (req->type == REQ_READ)	534	if (req->type == REQ_READ)
113	SvCUR_set (req->data, req->dataoffset	535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
114	+ req->result > 0 ? req->result : 0);
115		536
		537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		538	SvREADONLY_off (req->data);
		539
116	if (req->data)	540	if (req->statdata)
117	SvREFCNT_dec (req->data);
118
119	if (req->fh)
120	SvREFCNT_dec (req->fh);
121
122	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
123	{	541	{
124	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
125	PL_laststatval = req->result;	543	PL_laststatval = req->result;
126	PL_statcache = *(req->statdata);	544	PL_statcache = *(req->statdata);
127
128	Safefree (req->statdata);
129	}	545	}
130		546
131	ENTER;	547	req_invoke (req);
132	PUSHMARK (SP);
133	XPUSHs (sv_2mortal (newSViv (req->result)));
134		548
135	if (req->type == REQ_OPEN)
136	{
137	/* convert fd to fh */
138	SV *fh;
139
140	PUTBACK;
141	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
142	SPAGAIN;
143
144	fh = SvREFCNT_inc (POPs);
145
146	PUSHMARK (SP);
147	XPUSHs (sv_2mortal (fh));
148	}
149
150	if (SvOK (req->callback))
151	{
152	PUTBACK;
153	call_sv (req->callback, G_VOID | G_EVAL);
154	SPAGAIN;
155	}
156
157	LEAVE;
158
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161
162	errno = errorno;
163	count++;	549	count++;
164	}	550	}
165		551
166	prv = req;
167	req = req->next;
168	Safefree (prv);	552	req_free (req);
169
170	/* TODO: croak on errors? */
171	}	553	}
172		554
173	return count;	555	return count;
174	}	556	}
175		557
176	static void *aio_proc(void *arg);	558	static void *aio_proc(void *arg);
177		559
178	static void
179	start_thread (void)	560	static void start_thread (void)
180	{	561	{
181	sigset_t fullsigset, oldsigset;	562	sigset_t fullsigset, oldsigset;
182	pthread_t tid;
183	pthread_attr_t attr;	563	pthread_attr_t attr;
		564
		565	worker *wrk = calloc (1, sizeof (worker));
		566
		567	if (!wrk)
		568	croak ("unable to allocate worker thread data");
184		569
185	pthread_attr_init (&attr);	570	pthread_attr_init (&attr);
186	pthread_attr_setstacksize (&attr, STACKSIZE);	571	pthread_attr_setstacksize (&attr, STACKSIZE);
187	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
188		573
189	sigfillset (&fullsigset);	574	sigfillset (&fullsigset);
		575
		576	LOCK (wrklock);
190	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
191		578
192	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		580	{
		581	wrk->prev = &wrk_first;
		582	wrk->next = wrk_first.next;
		583	wrk_first.next->prev = wrk;
		584	wrk_first.next = wrk;
193	started++;	585	started++;
		586	}
		587	else
		588	free (wrk);
194		589
195	sigprocmask (SIG_SETMASK, &oldsigset, 0);	590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		591	UNLOCK (wrklock);
196	}	592	}
197		593
198	static void	594	static void req_send (aio_req req)
199	send_req (aio_req req)
200	{	595	{
		596	while (started < wanted && nreqs >= started)
		597	start_thread ();
		598
201	nreqs++;	599	++nreqs;
202		600
203	pthread_mutex_lock (&reqlock);	601	LOCK (reqlock);
204		602	reqq_push (&req_queue, req);
205	req->next = 0;
206
207	if (reqe)
208	{
209	reqe->next = req;
210	reqe = req;
211	}
212	else
213	reqe = reqs = req;
214
215	pthread_cond_signal (&reqwait);	603	pthread_cond_signal (&reqwait);
216	pthread_mutex_unlock (&reqlock);	604	UNLOCK (reqlock);
		605	}
217		606
218	while (nreqs > max_outstanding)	607	static void end_thread (void)
		608	{
		609	aio_req req;
		610
		611	Newz (0, req, 1, aio_cb);
		612
		613	req->type = REQ_QUIT;
		614	req->pri = PRI_MAX + PRI_BIAS;
		615
		616	req_send (req);
		617	}
		618
		619	static void min_parallel (int nthreads)
		620	{
		621	if (wanted < nthreads)
		622	wanted = nthreads;
		623	}
		624
		625	static void max_parallel (int nthreads)
		626	{
		627	int cur = started;
		628
		629	if (wanted > nthreads)
		630	wanted = nthreads;
		631
		632	while (cur > wanted)
		633	{
		634	end_thread ();
		635	cur--;
		636	}
		637
		638	while (started > wanted)
219	{	639	{
220	poll_wait ();	640	poll_wait ();
221	poll_cb ();	641	poll_cb ();
222	}	642	}
223	}	643	}
224		644
225	static void	645	static void create_pipe ()
226	end_thread (void)
227	{	646	{
228	aio_req req;	647	if (pipe (respipe))
229	New (0, req, 1, aio_cb);	648	croak ("unable to initialize result pipe");
230	req->type = REQ_QUIT;
231		649
232	send_req (req);	650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
233	}	651	croak ("cannot set result pipe to nonblocking mode");
234		652
235	static void *	653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		654	croak ("cannot set result pipe to nonblocking mode");
		655	}
		656
		657	/*****************************************************************************/
		658	/* work around various missing functions */
		659
		660	#if !HAVE_PREADWRITE
		661	# define pread aio_pread
		662	# define pwrite aio_pwrite
		663
		664	/*
		665	* make our pread/pwrite safe against themselves, but not against
		666	* normal read/write by using a mutex. slows down execution a lot,
		667	* but that's your problem, not mine.
		668	*/
		669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		670
		671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
		672	{
		673	ssize_t res;
		674	off_t ooffset;
		675
		676	LOCK (preadwritelock);
		677	ooffset = lseek (fd, 0, SEEK_CUR);
		678	lseek (fd, offset, SEEK_SET);
		679	res = read (fd, buf, count);
		680	lseek (fd, ooffset, SEEK_SET);
		681	UNLOCK (preadwritelock);
		682
		683	return res;
		684	}
		685
		686	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
		687	{
		688	ssize_t res;
		689	off_t ooffset;
		690
		691	LOCK (preadwritelock);
		692	ooffset = lseek (fd, 0, SEEK_CUR);
		693	lseek (fd, offset, SEEK_SET);
		694	res = write (fd, buf, count);
		695	lseek (fd, offset, SEEK_SET);
		696	UNLOCK (preadwritelock);
		697
		698	return res;
		699	}
		700	#endif
		701
		702	#if !HAVE_FDATASYNC
		703	# define fdatasync fsync
		704	#endif
		705
		706	#if !HAVE_READAHEAD
		707	# define readahead aio_readahead
		708
		709	static ssize_t readahead (int fd, off_t offset, size_t count)
		710	{
		711	dBUF;
		712
		713	while (count > 0)
		714	{
		715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
		716
		717	pread (fd, aio_buf, len, offset);
		718	offset += len;
		719	count -= len;
		720	}
		721
		722	errno = 0;
		723	}
		724	#endif
		725
		726	#if !HAVE_READDIR_R
		727	# define readdir_r aio_readdir_r
		728
		729	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		730
		731	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		732	{
		733	struct dirent *e;
		734	int errorno;
		735
		736	LOCK (readdirlock);
		737
		738	e = readdir (dirp);
		739	errorno = errno;
		740
		741	if (e)
		742	{
		743	*res = ent;
		744	strcpy (ent->d_name, e->d_name);
		745	}
		746	else
		747	*res = 0;
		748
		749	UNLOCK (readdirlock);
		750
		751	errno = errorno;
		752	return e ? 0 : -1;
		753	}
		754	#endif
		755
		756	/* sendfile always needs emulation */
		757	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		758	{
		759	ssize_t res;
		760
		761	if (!count)
		762	return 0;
		763
		764	#if HAVE_SENDFILE
		765	# if __linux
		766	res = sendfile (ofd, ifd, &offset, count);
		767
		768	# elif __freebsd
		769	/*
		770	* Of course, the freebsd sendfile is a dire hack with no thoughts
		771	* wasted on making it similar to other I/O functions.
		772	*/
		773	{
		774	off_t sbytes;
		775	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		776
		777	if (res < 0 && sbytes)
		778	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		779	res = sbytes;
		780	}
		781
		782	# elif __hpux
		783	res = sendfile (ofd, ifd, offset, count, 0, 0);
		784
		785	# elif __solaris
		786	{
		787	struct sendfilevec vec;
		788	size_t sbytes;
		789
		790	vec.sfv_fd = ifd;
		791	vec.sfv_flag = 0;
		792	vec.sfv_off = offset;
		793	vec.sfv_len = count;
		794
		795	res = sendfilev (ofd, &vec, 1, &sbytes);
		796
		797	if (res < 0 && sbytes)
		798	res = sbytes;
		799	}
		800
		801	# endif
		802	#else
		803	res = -1;
		804	errno = ENOSYS;
		805	#endif
		806
		807	if (res < 0
		808	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		809	#if __solaris
		810	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		811	#endif
		812	)
		813	)
		814	{
		815	/* emulate sendfile. this is a major pain in the ass */
		816	dBUF;
		817
		818	res = 0;
		819
		820	while (count)
		821	{
		822	ssize_t cnt;
		823
		824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		825
		826	if (cnt <= 0)
		827	{
		828	if (cnt && !res) res = -1;
		829	break;
		830	}
		831
		832	cnt = write (ofd, aio_buf, cnt);
		833
		834	if (cnt <= 0)
		835	{
		836	if (cnt && !res) res = -1;
		837	break;
		838	}
		839
		840	offset += cnt;
		841	res += cnt;
		842	count -= cnt;
		843	}
		844	}
		845
		846	return res;
		847	}
		848
		849	/* read a full directory */
		850	static void scandir_ (aio_req req, worker *self)
		851	{
		852	DIR *dirp;
		853	union
		854	{
		855	struct dirent d;
		856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		857	} *u;
		858	struct dirent *entp;
		859	char *name, *names;
		860	int memlen = 4096;
		861	int memofs = 0;
		862	int res = 0;
		863	int errorno;
		864
		865	LOCK (wrklock);
		866	self->dirp = dirp = opendir (req->dataptr);
		867	self->dbuf = u = malloc (sizeof (*u));
		868	UNLOCK (wrklock);
		869
		870	req->data2ptr = names = malloc (memlen);
		871
		872	if (dirp && u && names)
		873	for (;;)
		874	{
		875	errno = 0;
		876	readdir_r (dirp, &u->d, &entp);
		877
		878	if (!entp)
		879	break;
		880
		881	name = entp->d_name;
		882
		883	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		884	{
		885	int len = strlen (name) + 1;
		886
		887	res++;
		888
		889	while (memofs + len > memlen)
		890	{
		891	memlen *= 2;
		892	LOCK (wrklock);
		893	req->data2ptr = names = realloc (names, memlen);
		894	UNLOCK (wrklock);
		895
		896	if (!names)
		897	break;
		898	}
		899
		900	memcpy (names + memofs, name, len);
		901	memofs += len;
		902	}
		903	}
		904
		905	if (errno)
		906	res = -1;
		907
		908	req->result = res;
		909	}
		910
		911	/*****************************************************************************/
		912
236	aio_proc (void *thr_arg)	913	static void *aio_proc (void *thr_arg)
237	{	914	{
238	aio_req req;	915	aio_req req;
239	int type;	916	int type;
		917	worker *self = (worker *)thr_arg;
240		918
241	do	919	do
242	{	920	{
243	pthread_mutex_lock (&reqlock);	921	LOCK (reqlock);
244		922
245	for (;;)	923	for (;;)
246	{	924	{
247	req = reqs;	925	self->req = req = reqq_shift (&req_queue);
248
249	if (reqs)
250	{
251	reqs = reqs->next;
252	if (!reqs) reqe = 0;
253	}
254		926
255	if (req)	927	if (req)
256	break;	928	break;
257		929
258	pthread_cond_wait (&reqwait, &reqlock);	930	pthread_cond_wait (&reqwait, &reqlock);
259	}	931	}
260		932
261	pthread_mutex_unlock (&reqlock);	933	UNLOCK (reqlock);
262		934
263	errno = 0; /* strictly unnecessary */	935	errno = 0; /* strictly unnecessary */
		936	type = req->type; /* remember type for QUIT check */
264		937
265	type = req->type;	938	if (!(req->flags & FLAG_CANCELLED))
266
267	switch (type)	939	switch (type)
268	{	940	{
269	#if HAVE_PREADWRITE
270	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	941	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
271	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	942	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
272	#else
273	# error "pread/pwrite cannot be emulated, fix your os"
274	#endif
275		943
276	#if HAVE_READAHEAD
277	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	944	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
278	#else	945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
279	// TODO: emulate
280	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
281	#endif
282		946
283	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
284	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
285	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
286		950
287	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	951	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
288	case REQ_CLOSE: req->result = close (req->fd); break;	952	case REQ_CLOSE: req->result = close (req->fd); break;
289	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		954	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		955	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		956	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
		957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
290		958
291	case REQ_FDATASYNC:
292	#if HAVE_FDATASYNC
293	req->result = fdatasync (req->fd); break;	959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
294	#endif
295	case REQ_FSYNC: req->result = fsync (req->fd); break;	960	case REQ_FSYNC: req->result = fsync (req->fd); break;
		961	case REQ_READDIR: scandir_ (req, self); break;
296		962
		963	case REQ_BUSY:
		964	{
		965	struct timeval tv;
		966
		967	tv.tv_sec = req->fd;
		968	tv.tv_usec = req->fd2;
		969
		970	req->result = select (0, 0, 0, 0, &tv);
		971	}
		972
		973	case REQ_GROUP:
		974	case REQ_NOP:
297	case REQ_QUIT:	975	case REQ_QUIT:
298	break;	976	break;
299		977
300	default:	978	default:
301	req->result = ENOSYS;	979	req->result = ENOSYS;
302	break;	980	break;
303	}	981	}
304		982
305	req->errorno = errno;	983	req->errorno = errno;
306		984
307	pthread_mutex_lock (&reslock);	985	LOCK (reslock);
308		986
309	req->next = 0;	987	if (!reqq_push (&res_queue, req))
310
311	if (rese)
312	{
313	rese->next = req;
314	rese = req;
315	}
316	else
317	{
318	rese = ress = req;
319
320	/* write a dummy byte to the pipe so fh becomes ready */	988	/* write a dummy byte to the pipe so fh becomes ready */
321	write (respipe [1], &respipe, 1);	989	write (respipe [1], &respipe, 1);
322	}
323		990
324	pthread_mutex_unlock (&reslock);	991	self->req = 0;
		992	worker_clear (self);
		993
		994	UNLOCK (reslock);
325	}	995	}
326	while (type != REQ_QUIT);	996	while (type != REQ_QUIT);
327		997
		998	LOCK (wrklock);
		999	worker_free (self);
		1000	UNLOCK (wrklock);
		1001
328	return 0;	1002	return 0;
329	}	1003	}
330		1004
		1005	/*****************************************************************************/
		1006
		1007	static void atfork_prepare (void)
		1008	{
		1009	LOCK (wrklock);
		1010	LOCK (reqlock);
		1011	LOCK (reslock);
		1012	#if !HAVE_PREADWRITE
		1013	LOCK (preadwritelock);
		1014	#endif
		1015	#if !HAVE_READDIR_R
		1016	LOCK (readdirlock);
		1017	#endif
		1018	}
		1019
		1020	static void atfork_parent (void)
		1021	{
		1022	#if !HAVE_READDIR_R
		1023	UNLOCK (readdirlock);
		1024	#endif
		1025	#if !HAVE_PREADWRITE
		1026	UNLOCK (preadwritelock);
		1027	#endif
		1028	UNLOCK (reslock);
		1029	UNLOCK (reqlock);
		1030	UNLOCK (wrklock);
		1031	}
		1032
		1033	static void atfork_child (void)
		1034	{
		1035	aio_req prv;
		1036
		1037	while (prv = reqq_shift (&req_queue))
		1038	req_free (prv);
		1039
		1040	while (prv = reqq_shift (&res_queue))
		1041	req_free (prv);
		1042
		1043	while (wrk_first.next != &wrk_first)
		1044	{
		1045	worker *wrk = wrk_first.next;
		1046
		1047	if (wrk->req)
		1048	req_free (wrk->req);
		1049
		1050	worker_clear (wrk);
		1051	worker_free (wrk);
		1052	}
		1053
		1054	started = 0;
		1055	nreqs = 0;
		1056
		1057	close (respipe [0]);
		1058	close (respipe [1]);
		1059	create_pipe ();
		1060
		1061	atfork_parent ();
		1062	}
		1063
		1064	#define dREQ \
		1065	aio_req req; \
		1066	int req_pri = next_pri; \
		1067	next_pri = DEFAULT_PRI + PRI_BIAS; \
		1068	\
		1069	if (SvOK (callback) && !SvROK (callback)) \
		1070	croak ("callback must be undef or of reference type"); \
		1071	\
		1072	Newz (0, req, 1, aio_cb); \
		1073	if (!req) \
		1074	croak ("out of memory during aio_req allocation"); \
		1075	\
		1076	req->callback = newSVsv (callback); \
		1077	req->pri = req_pri
		1078
		1079	#define REQ_SEND \
		1080	req_send (req); \
		1081	\
		1082	if (GIMME_V != G_VOID) \
		1083	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		1084
331	MODULE = IO::AIO PACKAGE = IO::AIO	1085	MODULE = IO::AIO PACKAGE = IO::AIO
332		1086
333	PROTOTYPES: ENABLE	1087	PROTOTYPES: ENABLE
334		1088
335	BOOT:	1089	BOOT:
336	{	1090	{
337	if (pipe (respipe))	1091	HV *stash = gv_stashpv ("IO::AIO", 1);
338	croak ("unable to initialize result pipe");	1092	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1093	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1094	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
339		1095
340	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1096	create_pipe ();
341	croak ("cannot set result pipe to nonblocking mode");	1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
342
343	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
344	croak ("cannot set result pipe to nonblocking mode");
345	}	1098	}
346		1099
347	void	1100	void
348	min_parallel(nthreads)	1101	min_parallel (nthreads)
349	int nthreads	1102	int nthreads
350	PROTOTYPE: $	1103	PROTOTYPE: $
351	CODE:
352	while (nthreads > started)
353	start_thread ();
354		1104
355	void	1105	void
356	max_parallel(nthreads)	1106	max_parallel (nthreads)
357	int nthreads	1107	int nthreads
358	PROTOTYPE: $	1108	PROTOTYPE: $
359	CODE:
360	{
361	int cur = started;
362	while (cur > nthreads)
363	{
364	end_thread ();
365	cur--;
366	}
367		1109
368	while (started > nthreads)
369	{
370	poll_wait ();
371	poll_cb ();
372	}
373	}
374
375	int
376	max_outstanding(nreqs)
377	int nreqs
378	PROTOTYPE: $
379	CODE:
380	RETVAL = max_outstanding;
381	max_outstanding = nreqs;
382
383	void	1110	void
384	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
385	SV * pathname	1112	SV * pathname
386	int flags	1113	int flags
387	int mode	1114	int mode
388	SV * callback	1115	SV * callback
389	PROTOTYPE: $$$;$	1116	PROTOTYPE: $$$;$
390	CODE:	1117	PPCODE:
391	{	1118	{
392	aio_req req;	1119	dREQ;
393
394	Newz (0, req, 1, aio_cb);
395
396	if (!req)
397	croak ("out of memory during aio_req allocation");
398		1120
399	req->type = REQ_OPEN;	1121	req->type = REQ_OPEN;
400	req->data = newSVsv (pathname);	1122	req->data = newSVsv (pathname);
401	req->dataptr = SvPV_nolen (req->data);	1123	req->dataptr = SvPVbyte_nolen (req->data);
402	req->fd = flags;	1124	req->fd = flags;
403	req->mode = mode;	1125	req->mode = mode;
404	req->callback = SvREFCNT_inc (callback);
405		1126
406	send_req (req);	1127	REQ_SEND;
407	}	1128	}
408		1129
409	void	1130	void
410	aio_close(fh,callback=&PL_sv_undef)	1131	aio_close (fh,callback=&PL_sv_undef)
411	SV * fh	1132	SV * fh
412	SV * callback	1133	SV * callback
413	PROTOTYPE: $;$	1134	PROTOTYPE: $;$
414	ALIAS:	1135	ALIAS:
415	aio_close = REQ_CLOSE	1136	aio_close = REQ_CLOSE
416	aio_fsync = REQ_FSYNC	1137	aio_fsync = REQ_FSYNC
417	aio_fdatasync = REQ_FDATASYNC	1138	aio_fdatasync = REQ_FDATASYNC
418	CODE:	1139	PPCODE:
419	{	1140	{
420	aio_req req;	1141	dREQ;
421
422	Newz (0, req, 1, aio_cb);
423
424	if (!req)
425	croak ("out of memory during aio_req allocation");
426		1142
427	req->type = ix;	1143	req->type = ix;
428	req->fh = newSVsv (fh);	1144	req->fh = newSVsv (fh);
429	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
430	req->callback = SvREFCNT_inc (callback);
431		1146
432	send_req (req);	1147	REQ_SEND (req);
433	}	1148	}
434		1149
435	void	1150	void
436	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1151	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
437	SV * fh	1152	SV * fh
438	UV offset	1153	UV offset
439	IV length	1154	UV length
440	SV * data	1155	SV * data
441	IV dataoffset	1156	UV dataoffset
442	SV * callback	1157	SV * callback
443	ALIAS:	1158	ALIAS:
444	aio_read = REQ_READ	1159	aio_read = REQ_READ
445	aio_write = REQ_WRITE	1160	aio_write = REQ_WRITE
446	PROTOTYPE: $$$$$;$	1161	PROTOTYPE: $$$$$;$
447	CODE:	1162	PPCODE:
448	{	1163	{
449	aio_req req;	1164	aio_req req;
450	STRLEN svlen;	1165	STRLEN svlen;
451	char *svptr = SvPV (data, svlen);	1166	char *svptr = SvPVbyte (data, svlen);
452		1167
453	SvUPGRADE (data, SVt_PV);	1168	SvUPGRADE (data, SVt_PV);
454	SvPOK_on (data);	1169	SvPOK_on (data);
455		1170
456	if (dataoffset < 0)	1171	if (dataoffset < 0)
…		…
472	}	1187	}
473		1188
474	if (length < 0)	1189	if (length < 0)
475	croak ("length must not be negative");	1190	croak ("length must not be negative");
476		1191
477	Newz (0, req, 1, aio_cb);	1192	{
		1193	dREQ;
478		1194
479	if (!req)
480	croak ("out of memory during aio_req allocation");
481
482	req->type = ix;	1195	req->type = ix;
483	req->fh = newSVsv (fh);	1196	req->fh = newSVsv (fh);
484	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1197	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
485	: IoOFP (sv_2io (fh)));	1198	: IoOFP (sv_2io (fh)));
486	req->offset = offset;	1199	req->offset = offset;
		1200	req->length = length;
		1201	req->data = SvREFCNT_inc (data);
		1202	req->dataptr = (char *)svptr + dataoffset;
		1203
		1204	if (!SvREADONLY (data))
		1205	{
		1206	SvREADONLY_on (data);
		1207	req->data2ptr = (void *)data;
		1208	}
		1209
		1210	REQ_SEND;
		1211	}
		1212	}
		1213
		1214	void
		1215	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1216	SV * out_fh
		1217	SV * in_fh
		1218	UV in_offset
		1219	UV length
		1220	SV * callback
		1221	PROTOTYPE: $$$$;$
		1222	PPCODE:
		1223	{
		1224	dREQ;
		1225
		1226	req->type = REQ_SENDFILE;
		1227	req->fh = newSVsv (out_fh);
		1228	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1229	req->fh2 = newSVsv (in_fh);
		1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1231	req->offset = in_offset;
487	req->length = length;	1232	req->length = length;
488	req->data = SvREFCNT_inc (data);
489	req->dataptr = (char *)svptr + dataoffset;
490	req->callback = SvREFCNT_inc (callback);
491		1233
492	send_req (req);	1234	REQ_SEND;
493	}	1235	}
494		1236
495	void	1237	void
496	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
497	SV * fh	1239	SV * fh
498	UV offset	1240	UV offset
499	IV length	1241	IV length
500	SV * callback	1242	SV * callback
501	PROTOTYPE: $$$;$	1243	PROTOTYPE: $$$;$
502	CODE:	1244	PPCODE:
503	{	1245	{
504	aio_req req;	1246	dREQ;
505
506	if (length < 0)
507	croak ("length must not be negative");
508
509	Newz (0, req, 1, aio_cb);
510
511	if (!req)
512	croak ("out of memory during aio_req allocation");
513		1247
514	req->type = REQ_READAHEAD;	1248	req->type = REQ_READAHEAD;
515	req->fh = newSVsv (fh);	1249	req->fh = newSVsv (fh);
516	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
517	req->offset = offset;	1251	req->offset = offset;
518	req->length = length;	1252	req->length = length;
519	req->callback = SvREFCNT_inc (callback);
520		1253
521	send_req (req);	1254	REQ_SEND;
522	}	1255	}
523		1256
524	void	1257	void
525	aio_stat(fh_or_path,callback=&PL_sv_undef)	1258	aio_stat (fh_or_path,callback=&PL_sv_undef)
526	SV * fh_or_path	1259	SV * fh_or_path
527	SV * callback	1260	SV * callback
528	ALIAS:	1261	ALIAS:
529	aio_stat = REQ_STAT	1262	aio_stat = REQ_STAT
530	aio_lstat = REQ_LSTAT	1263	aio_lstat = REQ_LSTAT
531	CODE:	1264	PPCODE:
532	{	1265	{
533	aio_req req;	1266	dREQ;
534
535	Newz (0, req, 1, aio_cb);
536
537	if (!req)
538	croak ("out of memory during aio_req allocation");
539		1267
540	New (0, req->statdata, 1, Stat_t);	1268	New (0, req->statdata, 1, Stat_t);
541
542	if (!req->statdata)	1269	if (!req->statdata)
		1270	{
		1271	req_free (req);
543	croak ("out of memory during aio_req->statdata allocation");	1272	croak ("out of memory during aio_req->statdata allocation");
		1273	}
544		1274
545	if (SvPOK (fh_or_path))	1275	if (SvPOK (fh_or_path))
546	{	1276	{
547	req->type = ix;	1277	req->type = ix;
548	req->data = newSVsv (fh_or_path);	1278	req->data = newSVsv (fh_or_path);
549	req->dataptr = SvPV_nolen (req->data);	1279	req->dataptr = SvPVbyte_nolen (req->data);
550	}	1280	}
551	else	1281	else
552	{	1282	{
553	req->type = REQ_FSTAT;	1283	req->type = REQ_FSTAT;
554	req->fh = newSVsv (fh_or_path);	1284	req->fh = newSVsv (fh_or_path);
555	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
556	}	1286	}
557		1287
558	req->callback = SvREFCNT_inc (callback);	1288	REQ_SEND;
559
560	send_req (req);
561	}	1289	}
562		1290
563	void	1291	void
564	aio_unlink(pathname,callback=&PL_sv_undef)	1292	aio_unlink (pathname,callback=&PL_sv_undef)
565	SV * pathname	1293	SV * pathname
566	SV * callback	1294	SV * callback
		1295	ALIAS:
		1296	aio_unlink = REQ_UNLINK
		1297	aio_rmdir = REQ_RMDIR
		1298	aio_readdir = REQ_READDIR
567	CODE:	1299	PPCODE:
568	{	1300	{
569	aio_req req;	1301	dREQ;
570		1302
571	Newz (0, req, 1, aio_cb);	1303	req->type = ix;
		1304	req->data = newSVsv (pathname);
		1305	req->dataptr = SvPVbyte_nolen (req->data);
572		1306
573	if (!req)	1307	REQ_SEND;
574	croak ("out of memory during aio_req allocation");	1308	}
		1309
		1310	void
		1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1312	SV * oldpath
		1313	SV * newpath
		1314	SV * callback
		1315	ALIAS:
		1316	aio_link = REQ_LINK
		1317	aio_symlink = REQ_SYMLINK
		1318	aio_rename = REQ_RENAME
		1319	PPCODE:
		1320	{
		1321	dREQ;
575		1322
576	req->type = REQ_UNLINK;	1323	req->type = ix;
		1324	req->fh = newSVsv (oldpath);
		1325	req->data2ptr = SvPVbyte_nolen (req->fh);
577	req->data = newSVsv (pathname);	1326	req->data = newSVsv (newpath);
578	req->dataptr = SvPV_nolen (req->data);	1327	req->dataptr = SvPVbyte_nolen (req->data);
579	req->callback = SvREFCNT_inc (callback);
580		1328
581	send_req (req);	1329	REQ_SEND;
582	}	1330	}
583		1331
584	void	1332	void
		1333	aio_busy (delay,callback=&PL_sv_undef)
		1334	double delay
		1335	SV * callback
		1336	PPCODE:
		1337	{
		1338	dREQ;
		1339
		1340	req->type = REQ_BUSY;
		1341	req->fd = delay < 0. ? 0 : delay;
		1342	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1343
		1344	REQ_SEND;
		1345	}
		1346
		1347	void
		1348	aio_group (callback=&PL_sv_undef)
		1349	SV * callback
		1350	PROTOTYPE: ;$
		1351	PPCODE:
		1352	{
		1353	dREQ;
		1354
		1355	req->type = REQ_GROUP;
		1356	req_send (req);
		1357
		1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1359	}
		1360
		1361	void
		1362	aio_nop (callback=&PL_sv_undef)
		1363	SV * callback
		1364	PPCODE:
		1365	{
		1366	dREQ;
		1367
		1368	req->type = REQ_NOP;
		1369
		1370	REQ_SEND;
		1371	}
		1372
		1373	void
		1374	aioreq_pri (int pri = DEFAULT_PRI)
		1375	CODE:
		1376	if (pri < PRI_MIN) pri = PRI_MIN;
		1377	if (pri > PRI_MAX) pri = PRI_MAX;
		1378	next_pri = pri + PRI_BIAS;
		1379
		1380	void
		1381	aioreq_nice (int nice = 0)
		1382	CODE:
		1383	nice = next_pri - nice;
		1384	if (nice < PRI_MIN) nice = PRI_MIN;
		1385	if (nice > PRI_MAX) nice = PRI_MAX;
		1386	next_pri = nice + PRI_BIAS;
		1387
		1388	void
585	flush()	1389	flush ()
586	PROTOTYPE:	1390	PROTOTYPE:
587	CODE:	1391	CODE:
588	while (nreqs)	1392	while (nreqs)
589	{	1393	{
590	poll_wait ();	1394	poll_wait ();
…		…
630	CODE:	1434	CODE:
631	RETVAL = nreqs;	1435	RETVAL = nreqs;
632	OUTPUT:	1436	OUTPUT:
633	RETVAL	1437	RETVAL
634		1438
		1439	PROTOTYPES: DISABLE
		1440
		1441	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1442
		1443	void
		1444	cancel (aio_req_ornot req)
		1445	CODE:
		1446	req_cancel (req);
		1447
		1448	void
		1449	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1450	CODE:
		1451	SvREFCNT_dec (req->callback);
		1452	req->callback = newSVsv (callback);
		1453
		1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1455
		1456	void
		1457	add (aio_req grp, ...)
		1458	PPCODE:
		1459	{
		1460	int i;
		1461	aio_req req;
		1462
		1463	if (grp->fd == 2)
		1464	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1465
		1466	for (i = 1; i < items; ++i )
		1467	{
		1468	if (GIMME_V != G_VOID)
		1469	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1470
		1471	req = SvAIO_REQ (ST (i));
		1472
		1473	if (req)
		1474	{
		1475	++grp->length;
		1476	req->grp = grp;
		1477
		1478	req->grp_prev = 0;
		1479	req->grp_next = grp->grp_first;
		1480
		1481	if (grp->grp_first)
		1482	grp->grp_first->grp_prev = req;
		1483
		1484	grp->grp_first = req;
		1485	}
		1486	}
		1487	}
		1488
		1489	void
		1490	cancel_subs (aio_req_ornot req)
		1491	CODE:
		1492	req_cancel_subs (req);
		1493
		1494	void
		1495	result (aio_req grp, ...)
		1496	CODE:
		1497	{
		1498	int i;
		1499	AV *av = newAV ();
		1500
		1501	for (i = 1; i < items; ++i )
		1502	av_push (av, newSVsv (ST (i)));
		1503
		1504	SvREFCNT_dec (grp->data);
		1505	grp->data = (SV *)av;
		1506	}
		1507
		1508	void
		1509	limit (aio_req grp, int limit)
		1510	CODE:
		1511	grp->fd2 = limit;
		1512	aio_grp_feed (grp);
		1513
		1514	void
		1515	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1516	CODE:
		1517	{
		1518	SvREFCNT_dec (grp->fh2);
		1519	grp->fh2 = newSVsv (callback);
		1520
		1521	if (grp->fd2 <= 0)
		1522	grp->fd2 = 2;
		1523
		1524	aio_grp_feed (grp);
		1525	}
		1526

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