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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.10 by root, Wed Jul 13 00:13:09 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	#define _XOPEN_SOURCE 500	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>
		31
		32	#if HAVE_SENDFILE
14	#if __linux	33	# if __linux
		34	# include <sys/sendfile.h>
		35	# elif __freebsd
15	#include <sys/syscall.h>	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
16	#endif	44	# endif
		45	#endif
17		46
18	#include <pthread.h>	47	/* used for struct dirent, AIX doesn't provide it */
19		48	#ifndef NAME_MAX
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	49	# define NAME_MAX 4096
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	50	#endif
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		51
24	#if __ia64	52	#if __ia64
25	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
26	#else	56	#else
27	# define STACKSIZE 4096	57	# define STACKSIZE 16384
28	#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;
29		70
30	enum {	71	enum {
31	REQ_QUIT,	72	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	73	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		75	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	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,
36	};	83	};
37		84
		85	#define AIO_REQ_KLASS "IO::AIO::REQ"
		86	#define AIO_GRP_KLASS "IO::AIO::GRP"
		87
38	typedef struct aio_cb {	88	typedef struct aio_cb
		89	{
39	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
40		91
41	int type;	92	SV *data, *callback;
42		93	SV *fh, *fh2;
43	int fd;	94	void *dataptr, *data2ptr;
		95	Stat_t *statdata;
44	off_t offset;	96	off_t offset;
45	size_t length;	97	size_t length;
46	ssize_t result;	98	ssize_t result;
		99
		100	STRLEN dataoffset;
		101	int type;
		102	int fd, fd2;
		103	int errorno;
47	mode_t mode; /* open */	104	mode_t mode; /* open */
48	int errorno;
49	SV *data, *callback;
50	void *dataptr;
51	STRLEN dataoffset;
52		105
53	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;
54	} aio_cb;	111	} aio_cb;
55		112
		113	enum {
		114	FLAG_CANCELLED = 0x01,
		115	};
		116
56	typedef aio_cb *aio_req;	117	typedef aio_cb *aio_req;
		118	typedef aio_cb *aio_req_ornot;
57		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
58	static int started;	131	static int started, wanted;
59	static int nreqs;	132	static volatile int nreqs;
60	static int max_outstanding = 1<<30;
61	static int respipe [2];	133	static int respipe [2];
62		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
63	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
64	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
65	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66		187
67	static volatile aio_req reqs, reqe; /* queue start, queue end */	188	/*
68	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;
69		197
70	static void	198	static reqq req_queue;
71	poll_wait ()	199	static reqq res_queue;
		200
		201	int reqq_push (reqq *q, aio_req req)
72	{	202	{
		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;
		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	{
73	if (!nreqs)	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	{
		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
		335	FD_ZERO(&rfd);
		336	FD_SET(respipe [0], &rfd);
		337
		338	select (respipe [0] + 1, &rfd, 0, 0, 0);
		339	}
		340	}
		341
		342	static void req_invoke (aio_req req)
		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)
74	return;	479	return;
75		480
76	fd_set rfd;	481	SvREFCNT_dec (grp->fh2);
77	FD_ZERO(&rfd);	482	grp->fh2 = 0;
78	FD_SET(respipe [0], &rfd);
79		483
80	select (respipe [0] + 1, &rfd, 0, 0, 0);	484	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		485	req_cancel (sub);
81	}	486	}
82		487
83	static int	488	static void req_cancel (aio_req req)
84	poll_cb ()	489	{
		490	req->flags |= FLAG_CANCELLED;
		491
		492	req_cancel_subs (req);
		493	}
		494
		495	static int poll_cb ()
85	{	496	{
86	dSP;	497	dSP;
87	int count = 0;	498	int count = 0;
		499	int do_croak = 0;
88	aio_req req;	500	aio_req req;
89
90	{
91	/* read and signals sent by the worker threads */
92	char buf [32];
93	while (read (respipe [0], buf, 32) > 0)
94	;
95	}
96		501
97	for (;;)	502	for (;;)
98	{	503	{
99	pthread_mutex_lock (&reslock);	504	LOCK (reslock);
		505	req = reqq_shift (&res_queue);
100		506
101	req = ress;
102
103	if (ress)	507	if (req)
104	{	508	{
105	ress = ress->next;	509	if (!res_queue.size)
106	if (!ress) rese = 0;	510	{
		511	/* read any signals sent by the worker threads */
		512	char buf [32];
		513	while (read (respipe [0], buf, 32) == 32)
		514	;
		515	}
107	}	516	}
108		517
109	pthread_mutex_unlock (&reslock);	518	UNLOCK (reslock);
110		519
111	if (!req)	520	if (!req)
112	break;	521	break;
113		522
114	nreqs--;	523	--nreqs;
115		524
116	if (req->type == REQ_QUIT)	525	if (req->type == REQ_QUIT)
117	started--;	526	started--;
		527	else if (req->type == REQ_GROUP && req->length)
		528	{
		529	req->fd = 1; /* mark request as delayed */
		530	continue;
		531	}
118	else	532	else
119	{	533	{
120	int errorno = errno;
121	errno = req->errorno;
122
123	if (req->type == REQ_READ)	534	if (req->type == REQ_READ)
124	SvCUR_set (req->data, req->dataoffset	535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
125	+ req->result > 0 ? req->result : 0);
126		536
		537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		538	SvREADONLY_off (req->data);
		539
127	if (req->data)	540	if (req->statdata)
128	SvREFCNT_dec (req->data);
129
130	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
131	{	541	{
132	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
133	PL_laststatval = req->result;	543	PL_laststatval = req->result;
134	PL_statcache = *(req->statdata);	544	PL_statcache = *(req->statdata);
135
136	Safefree (req->statdata);
137	}	545	}
138		546
139	PUSHMARK (SP);	547	req_invoke (req);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141		548
142	if (req->type == REQ_OPEN)
143	{
144	/* convert fd to fh */
145	SV *fh;
146
147	PUTBACK;
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149	SPAGAIN;
150
151	fh = POPs;
152
153	PUSHMARK (SP);
154	XPUSHs (fh);
155	}
156
157	if (SvOK (req->callback))
158	{
159	PUTBACK;
160	call_sv (req->callback, G_VOID | G_EVAL);
161	SPAGAIN;
162	}
163
164	if (req->callback)
165	SvREFCNT_dec (req->callback);
166
167	errno = errorno;
168	count++;	549	count++;
169	}	550	}
170		551
171	Safefree (req);	552	req_free (req);
172	}	553	}
173		554
174	return count;	555	return count;
175	}	556	}
176		557
177	static void *aio_proc(void *arg);	558	static void *aio_proc(void *arg);
178		559
179	static void
180	start_thread (void)	560	static void start_thread (void)
181	{	561	{
182	sigset_t fullsigset, oldsigset;	562	sigset_t fullsigset, oldsigset;
183	pthread_t tid;
184	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");
185		569
186	pthread_attr_init (&attr);	570	pthread_attr_init (&attr);
187	pthread_attr_setstacksize (&attr, STACKSIZE);	571	pthread_attr_setstacksize (&attr, STACKSIZE);
188	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
189		573
190	sigfillset (&fullsigset);	574	sigfillset (&fullsigset);
		575
		576	LOCK (wrklock);
191	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
192		578
193	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;
194	started++;	585	started++;
		586	}
		587	else
		588	free (wrk);
195		589
196	sigprocmask (SIG_SETMASK, &oldsigset, 0);	590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		591	UNLOCK (wrklock);
197	}	592	}
198		593
199	static void	594	static void req_send (aio_req req)
200	send_req (aio_req req)
201	{	595	{
		596	while (started < wanted && nreqs >= started)
		597	start_thread ();
		598
202	nreqs++;	599	++nreqs;
203		600
204	pthread_mutex_lock (&reqlock);	601	LOCK (reqlock);
205		602	reqq_push (&req_queue, req);
206	req->next = 0;
207
208	if (reqe)
209	{
210	reqe->next = req;
211	reqe = req;
212	}
213	else
214	reqe = reqs = req;
215
216	pthread_cond_signal (&reqwait);	603	pthread_cond_signal (&reqwait);
217	pthread_mutex_unlock (&reqlock);	604	UNLOCK (reqlock);
		605	}
218		606
219	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)
220	{	639	{
221	poll_wait ();	640	poll_wait ();
222	poll_cb ();	641	poll_cb ();
223	}	642	}
224	}	643	}
225		644
226	static void	645	static void create_pipe ()
227	end_thread (void)
228	{	646	{
229	aio_req req;	647	if (pipe (respipe))
230	New (0, req, 1, aio_cb);	648	croak ("unable to initialize result pipe");
231	req->type = REQ_QUIT;
232		649
233	send_req (req);	650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
234	}	651	croak ("cannot set result pipe to nonblocking mode");
235		652
236	static void	653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
237	read_write (int dowrite, int fd, off_t offset, size_t length,	654	croak ("cannot set result pipe to nonblocking mode");
238	SV *data, STRLEN dataoffset, SV *callback)	655	}
239	{
240	aio_req req;
241	STRLEN svlen;
242	char *svptr = SvPV (data, svlen);
243		656
244	SvUPGRADE (data, SVt_PV);	657	/*****************************************************************************/
245	SvPOK_on (data);	658	/* work around various missing functions */
246		659
247	if (dataoffset < 0)	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);
248	dataoffset += svlen;	718	offset += len;
249		719	count -= len;
250	if (dataoffset < 0 || dataoffset > svlen)
251	croak ("data offset outside of string");
252
253	if (dowrite)
254	{	720	}
255	/* write: check length and adjust. */	721
256	if (length < 0 || length + dataoffset > svlen)	722	errno = 0;
257	length = svlen - dataoffset;	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);
258	}	745	}
259	else	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 (;;)
260	{	874	{
261	/* read: grow scalar as necessary */	875	errno = 0;
262	svptr = SvGROW (data, length + dataoffset);	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	}
263	}	903	}
264		904
265	if (length < 0)	905	if (errno)
266	croak ("length must not be negative");	906	res = -1;
267		907
268	Newz (0, req, 1, aio_cb);	908	req->result = res;
269
270	if (!req)
271	croak ("out of memory during aio_req allocation");
272
273	req->type = dowrite ? REQ_WRITE : REQ_READ;
274	req->fd = fd;
275	req->offset = offset;
276	req->length = length;
277	req->data = SvREFCNT_inc (data);
278	req->dataptr = (char *)svptr + dataoffset;
279	req->callback = SvREFCNT_inc (callback);
280
281	send_req (req);
282	}	909	}
283		910
284	static void *	911	/*****************************************************************************/
		912
285	aio_proc (void *thr_arg)	913	static void *aio_proc (void *thr_arg)
286	{	914	{
287	aio_req req;	915	aio_req req;
288	int type;	916	int type;
		917	worker *self = (worker *)thr_arg;
289		918
290	do	919	do
291	{	920	{
292	pthread_mutex_lock (&reqlock);	921	LOCK (reqlock);
293		922
294	for (;;)	923	for (;;)
295	{	924	{
296	req = reqs;	925	self->req = req = reqq_shift (&req_queue);
297
298	if (reqs)
299	{
300	reqs = reqs->next;
301	if (!reqs) reqe = 0;
302	}
303		926
304	if (req)	927	if (req)
305	break;	928	break;
306		929
307	pthread_cond_wait (&reqwait, &reqlock);	930	pthread_cond_wait (&reqwait, &reqlock);
308	}	931	}
309		932
310	pthread_mutex_unlock (&reqlock);	933	UNLOCK (reqlock);
311		934
312	errno = 0; /* strictly unnecessary */	935	errno = 0; /* strictly unnecessary */
		936	type = req->type; /* remember type for QUIT check */
313		937
314	type = req->type;	938	if (!(req->flags & FLAG_CANCELLED))
315
316	switch (type)	939	switch (type)
317	{	940	{
318	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;
319	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;
320	#if SYS_readahead	943
321	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;
322	#else	945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
323	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
324	#endif
325		946
326	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
327	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
328	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
329		950
330	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;
331	case REQ_CLOSE: req->result = close (req->fd); break;	952	case REQ_CLOSE: req->result = close (req->fd); break;
332	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
333
334	case REQ_FSYNC: req->result = fsync (req->fd); 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;
		958
335	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
		960	case REQ_FSYNC: req->result = fsync (req->fd); break;
		961	case REQ_READDIR: scandir_ (req, self); break;
336		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:
337	case REQ_QUIT:	975	case REQ_QUIT:
338	break;	976	break;
339		977
340	default:	978	default:
341	req->result = ENOSYS;	979	req->result = ENOSYS;
342	break;	980	break;
343	}	981	}
344		982
345	req->errorno = errno;	983	req->errorno = errno;
346		984
347	pthread_mutex_lock (&reslock);	985	LOCK (reslock);
348		986
349	req->next = 0;	987	if (!reqq_push (&res_queue, req))
350
351	if (rese)
352	{
353	rese->next = req;
354	rese = req;
355	}
356	else
357	{
358	rese = ress = req;
359
360	/* write a dummy byte to the pipe so fh becomes ready */	988	/* write a dummy byte to the pipe so fh becomes ready */
361	write (respipe [1], &respipe, 1);	989	write (respipe [1], &respipe, 1);
362	}
363		990
364	pthread_mutex_unlock (&reslock);	991	self->req = 0;
		992	worker_clear (self);
		993
		994	UNLOCK (reslock);
365	}	995	}
366	while (type != REQ_QUIT);	996	while (type != REQ_QUIT);
367		997
		998	LOCK (wrklock);
		999	worker_free (self);
		1000	UNLOCK (wrklock);
		1001
368	return 0;	1002	return 0;
369	}	1003	}
370		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
371	MODULE = IO::AIO PACKAGE = IO::AIO	1085	MODULE = IO::AIO PACKAGE = IO::AIO
372		1086
373	PROTOTYPES: ENABLE	1087	PROTOTYPES: ENABLE
374		1088
375	BOOT:	1089	BOOT:
376	{	1090	{
377	if (pipe (respipe))	1091	HV *stash = gv_stashpv ("IO::AIO", 1);
378	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));
379		1095
380	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1096	create_pipe ();
381	croak ("cannot set result pipe to nonblocking mode");	1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
382
383	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
384	croak ("cannot set result pipe to nonblocking mode");
385	}	1098	}
386		1099
387	void	1100	void
388	min_parallel(nthreads)	1101	min_parallel (nthreads)
389	int nthreads	1102	int nthreads
390	PROTOTYPE: $	1103	PROTOTYPE: $
391	CODE:
392	while (nthreads > started)
393	start_thread ();
394		1104
395	void	1105	void
396	max_parallel(nthreads)	1106	max_parallel (nthreads)
397	int nthreads	1107	int nthreads
398	PROTOTYPE: $	1108	PROTOTYPE: $
399	CODE:
400	{
401	int cur = started;
402	while (cur > nthreads)
403	{
404	end_thread ();
405	cur--;
406	}
407		1109
408	while (started > nthreads)
409	{
410	poll_wait ();
411	poll_cb ();
412	}
413	}
414
415	int
416	max_outstanding(nreqs)
417	int nreqs
418	PROTOTYPE: $
419	CODE:
420	RETVAL = max_outstanding;
421	max_outstanding = nreqs;
422
423	void	1110	void
424	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
425	SV * pathname	1112	SV * pathname
426	int flags	1113	int flags
427	int mode	1114	int mode
428	SV * callback	1115	SV * callback
429	PROTOTYPE: $$$;$	1116	PROTOTYPE: $$$;$
430	CODE:	1117	PPCODE:
431	{	1118	{
432	aio_req req;	1119	dREQ;
433
434	Newz (0, req, 1, aio_cb);
435
436	if (!req)
437	croak ("out of memory during aio_req allocation");
438		1120
439	req->type = REQ_OPEN;	1121	req->type = REQ_OPEN;
440	req->data = newSVsv (pathname);	1122	req->data = newSVsv (pathname);
441	req->dataptr = SvPV_nolen (req->data);	1123	req->dataptr = SvPVbyte_nolen (req->data);
442	req->fd = flags;	1124	req->fd = flags;
443	req->mode = mode;	1125	req->mode = mode;
444	req->callback = SvREFCNT_inc (callback);
445		1126
446	send_req (req);	1127	REQ_SEND;
447	}	1128	}
448		1129
449	void	1130	void
450	aio_close(fh,callback=&PL_sv_undef)	1131	aio_close (fh,callback=&PL_sv_undef)
451	InputStream fh	1132	SV * fh
452	SV * callback	1133	SV * callback
453	PROTOTYPE: $;$	1134	PROTOTYPE: $;$
454	ALIAS:	1135	ALIAS:
455	aio_close = REQ_CLOSE	1136	aio_close = REQ_CLOSE
456	aio_fsync = REQ_FSYNC	1137	aio_fsync = REQ_FSYNC
457	aio_fdatasync = REQ_FDATASYNC	1138	aio_fdatasync = REQ_FDATASYNC
458	CODE:	1139	PPCODE:
		1140	{
		1141	dREQ;
		1142
		1143	req->type = ix;
		1144	req->fh = newSVsv (fh);
		1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		1146
		1147	REQ_SEND (req);
		1148	}
		1149
		1150	void
		1151	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		1152	SV * fh
		1153	UV offset
		1154	UV length
		1155	SV * data
		1156	UV dataoffset
		1157	SV * callback
		1158	ALIAS:
		1159	aio_read = REQ_READ
		1160	aio_write = REQ_WRITE
		1161	PROTOTYPE: $$$$$;$
		1162	PPCODE:
459	{	1163	{
460	aio_req req;	1164	aio_req req;
		1165	STRLEN svlen;
		1166	char *svptr = SvPVbyte (data, svlen);
461		1167
462	Newz (0, req, 1, aio_cb);	1168	SvUPGRADE (data, SVt_PV);
		1169	SvPOK_on (data);
463		1170
464	if (!req)	1171	if (dataoffset < 0)
465	croak ("out of memory during aio_req allocation");	1172	dataoffset += svlen;
466		1173
467	req->type = ix;	1174	if (dataoffset < 0 || dataoffset > svlen)
468	req->fd = PerlIO_fileno (fh);	1175	croak ("data offset outside of string");
469	req->callback = SvREFCNT_inc (callback);
470		1176
471	send_req (req);	1177	if (ix == REQ_WRITE)
472	}	1178	{
473		1179	/* write: check length and adjust. */
474	void	1180	if (length < 0 || length + dataoffset > svlen)
475	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1181	length = svlen - dataoffset;
476	InputStream fh	1182	}
477	UV offset	1183	else
478	IV length	1184	{
479	SV * data	1185	/* read: grow scalar as necessary */
480	IV dataoffset	1186	svptr = SvGROW (data, length + dataoffset);
481	SV * callback	1187	}
482	PROTOTYPE: $$$$$;$
483	CODE:
484	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
485
486	void
487	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
488	OutputStream fh
489	UV offset
490	IV length
491	SV * data
492	IV dataoffset
493	SV * callback
494	PROTOTYPE: $$$$$;$
495	CODE:
496	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
497
498	void
499	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
500	InputStream fh
501	UV offset
502	IV length
503	SV * callback
504	PROTOTYPE: $$$;$
505	CODE:
506	{
507	aio_req req;
508		1188
509	if (length < 0)	1189	if (length < 0)
510	croak ("length must not be negative");	1190	croak ("length must not be negative");
511		1191
512	Newz (0, req, 1, aio_cb);	1192	{
		1193	dREQ;
513		1194
514	if (!req)	1195	req->type = ix;
515	croak ("out of memory during aio_req allocation");	1196	req->fh = newSVsv (fh);
		1197	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		1198	: IoOFP (sv_2io (fh)));
		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: $$$$;$
		1222	PPCODE:
		1223	{
		1224	dREQ;
		1225
		1226	req->type = REQ_SENDFILE;
		1227	req->fh = newSVsv (out_fh);
		1228	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1229	req->fh2 = newSVsv (in_fh);
		1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1231	req->offset = in_offset;
		1232	req->length = length;
		1233
		1234	REQ_SEND;
		1235	}
		1236
		1237	void
		1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
		1239	SV * fh
		1240	UV offset
		1241	IV length
		1242	SV * callback
		1243	PROTOTYPE: $$$;$
		1244	PPCODE:
		1245	{
		1246	dREQ;
516		1247
517	req->type = REQ_READAHEAD;	1248	req->type = REQ_READAHEAD;
		1249	req->fh = newSVsv (fh);
518	req->fd = PerlIO_fileno (fh);	1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
519	req->offset = offset;	1251	req->offset = offset;
520	req->length = length;	1252	req->length = length;
521	req->callback = SvREFCNT_inc (callback);
522		1253
523	send_req (req);	1254	REQ_SEND;
524	}	1255	}
525		1256
526	void	1257	void
527	aio_stat(fh_or_path,callback=&PL_sv_undef)	1258	aio_stat (fh_or_path,callback=&PL_sv_undef)
528	SV * fh_or_path	1259	SV * fh_or_path
529	SV * callback	1260	SV * callback
530	ALIAS:	1261	ALIAS:
531	aio_stat = REQ_STAT	1262	aio_stat = REQ_STAT
532	aio_lstat = REQ_LSTAT	1263	aio_lstat = REQ_LSTAT
533	CODE:	1264	PPCODE:
534	{	1265	{
535	aio_req req;	1266	dREQ;
536
537	Newz (0, req, 1, aio_cb);
538
539	if (!req)
540	croak ("out of memory during aio_req allocation");
541		1267
542	New (0, req->statdata, 1, Stat_t);	1268	New (0, req->statdata, 1, Stat_t);
543
544	if (!req->statdata)	1269	if (!req->statdata)
		1270	{
		1271	req_free (req);
545	croak ("out of memory during aio_req->statdata allocation");	1272	croak ("out of memory during aio_req->statdata allocation");
		1273	}
546		1274
547	if (SvPOK (fh_or_path))	1275	if (SvPOK (fh_or_path))
548	{	1276	{
549	req->type = ix;	1277	req->type = ix;
550	req->data = newSVsv (fh_or_path);	1278	req->data = newSVsv (fh_or_path);
551	req->dataptr = SvPV_nolen (req->data);	1279	req->dataptr = SvPVbyte_nolen (req->data);
552	}	1280	}
553	else	1281	else
554	{	1282	{
555	req->type = REQ_FSTAT;	1283	req->type = REQ_FSTAT;
		1284	req->fh = newSVsv (fh_or_path);
556	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
557	}	1286	}
558		1287
559	req->callback = SvREFCNT_inc (callback);	1288	REQ_SEND;
560
561	send_req (req);
562	}	1289	}
563		1290
564	void	1291	void
565	aio_unlink(pathname,callback=&PL_sv_undef)	1292	aio_unlink (pathname,callback=&PL_sv_undef)
566	SV * pathname	1293	SV * pathname
567	SV * callback	1294	SV * callback
		1295	ALIAS:
		1296	aio_unlink = REQ_UNLINK
		1297	aio_rmdir = REQ_RMDIR
		1298	aio_readdir = REQ_READDIR
568	CODE:	1299	PPCODE:
569	{	1300	{
570	aio_req req;	1301	dREQ;
571		1302
572	Newz (0, req, 1, aio_cb);	1303	req->type = ix;
		1304	req->data = newSVsv (pathname);
		1305	req->dataptr = SvPVbyte_nolen (req->data);
573		1306
574	if (!req)	1307	REQ_SEND;
575	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;
576		1322
577	req->type = REQ_UNLINK;	1323	req->type = ix;
		1324	req->fh = newSVsv (oldpath);
		1325	req->data2ptr = SvPVbyte_nolen (req->fh);
578	req->data = newSVsv (pathname);	1326	req->data = newSVsv (newpath);
579	req->dataptr = SvPV_nolen (req->data);	1327	req->dataptr = SvPVbyte_nolen (req->data);
580	req->callback = SvREFCNT_inc (callback);
581		1328
582	send_req (req);	1329	REQ_SEND;
583	}	1330	}
584		1331
585	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
586	flush()	1389	flush ()
587	PROTOTYPE:	1390	PROTOTYPE:
588	CODE:	1391	CODE:
589	while (nreqs)	1392	while (nreqs)
590	{	1393	{
591	poll_wait ();	1394	poll_wait ();
…		…
631	CODE:	1434	CODE:
632	RETVAL = nreqs;	1435	RETVAL = nreqs;
633	OUTPUT:	1436	OUTPUT:
634	RETVAL	1437	RETVAL
635		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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