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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.23 by root, Tue Aug 16 23:33:34 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
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
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,	76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,	78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37	REQ_SYMLINK,	79	REQ_READDIR,
		80	REQ_LINK, REQ_SYMLINK,
		81	REQ_GROUP, REQ_NOP,
		82	REQ_BUSY,
38	};	83	};
39		84
		85	#define AIO_REQ_KLASS "IO::AIO::REQ"
		86	#define AIO_GRP_KLASS "IO::AIO::GRP"
		87
40	typedef struct aio_cb {	88	typedef struct aio_cb
		89	{
41	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
42		91
43	int type;	92	SV *data, *callback;
44		93	SV *fh, *fh2;
45	int fd;	94	void *dataptr, *data2ptr;
		95	Stat_t *statdata;
46	off_t offset;	96	off_t offset;
47	size_t length;	97	size_t length;
48	ssize_t result;	98	ssize_t result;
		99
		100	STRLEN dataoffset;
		101	int type;
		102	int fd, fd2;
		103	int errorno;
49	mode_t mode; /* open */	104	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54		105
55	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;
56	} aio_cb;	111	} aio_cb;
57		112
		113	enum {
		114	FLAG_CANCELLED = 0x01,
		115	};
		116
58	typedef aio_cb *aio_req;	117	typedef aio_cb *aio_req;
		118	typedef aio_cb *aio_req_ornot;
59		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
60	static int started;	131	static int started, wanted;
61	static volatile int nreqs;	132	static volatile int nreqs;
62	static int max_outstanding = 1<<30;
63	static int respipe [2];	133	static int respipe [2];
64		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
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
67	static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		187
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	188	/*
71	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;
72		197
73	static void	198	static reqq req_queue;
74	poll_wait ()	199	static reqq res_queue;
		200
		201	int reqq_push (reqq *q, aio_req req)
75	{	202	{
76	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;
77	{	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	{
78	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
79	FD_ZERO(&rfd);	335	FD_ZERO(&rfd);
80	FD_SET(respipe [0], &rfd);	336	FD_SET(respipe [0], &rfd);
81		337
82	select (respipe [0] + 1, &rfd, 0, 0, 0);	338	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	339	}
84	}	340	}
85		341
86	static int	342	static void req_invoke (aio_req req)
87	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 ()
88	{	496	{
89	dSP;	497	dSP;
90	int count = 0;	498	int count = 0;
		499	int do_croak = 0;
91	aio_req req, prv;	500	aio_req req;
92		501
93	pthread_mutex_lock (&reslock);	502	for (;;)
94
95	{	503	{
		504	LOCK (reslock);
		505	req = reqq_shift (&res_queue);
		506
		507	if (req)
		508	{
		509	if (!res_queue.size)
		510	{
96	/* read any signals sent by the worker threads */	511	/* read any signals sent by the worker threads */
97	char buf [32];	512	char buf [32];
98	while (read (respipe [0], buf, 32) == 32)	513	while (read (respipe [0], buf, 32) == 32)
		514	;
		515	}
99	;	516	}
100	}
101		517
102	req = ress;	518	UNLOCK (reslock);
103	ress = rese = 0;
104		519
105	pthread_mutex_unlock (&reslock);	520	if (!req)
		521	break;
106		522
107	while (req)
108	{
109	nreqs--;	523	--nreqs;
110		524
111	if (req->type == REQ_QUIT)	525	if (req->type == REQ_QUIT)
112	started--;	526	started--;
		527	else if (req->type == REQ_GROUP && req->length)
		528	{
		529	req->fd = 1; /* mark request as delayed */
		530	continue;
		531	}
113	else	532	else
114	{	533	{
115	int errorno = errno;
116	errno = req->errorno;
117
118	if (req->type == REQ_READ)	534	if (req->type == REQ_READ)
119	SvCUR_set (req->data, req->dataoffset	535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
120	+ req->result > 0 ? req->result : 0);
121		536
		537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		538	SvREADONLY_off (req->data);
		539
122	if (req->data)	540	if (req->statdata)
123	SvREFCNT_dec (req->data);
124
125	if (req->fh)
126	SvREFCNT_dec (req->fh);
127
128	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
129	{	541	{
130	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131	PL_laststatval = req->result;	543	PL_laststatval = req->result;
132	PL_statcache = *(req->statdata);	544	PL_statcache = *(req->statdata);
133
134	Safefree (req->statdata);
135	}	545	}
136		546
137	ENTER;	547	req_invoke (req);
138	PUSHMARK (SP);
139	XPUSHs (sv_2mortal (newSViv (req->result)));
140		548
141	if (req->type == REQ_OPEN)
142	{
143	/* convert fd to fh */
144	SV *fh;
145
146	PUTBACK;
147	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
148	SPAGAIN;
149
150	fh = SvREFCNT_inc (POPs);
151
152	PUSHMARK (SP);
153	XPUSHs (sv_2mortal (fh));
154	}
155
156	if (SvOK (req->callback))
157	{
158	PUTBACK;
159	call_sv (req->callback, G_VOID | G_EVAL);
160	SPAGAIN;
161	}
162
163	LEAVE;
164
165	if (req->callback)
166	SvREFCNT_dec (req->callback);
167
168	errno = errorno;
169	count++;	549	count++;
170	}	550	}
171		551
172	prv = req;
173	req = req->next;
174	Safefree (prv);	552	req_free (req);
175
176	/* TODO: croak on errors? */
177	}	553	}
178		554
179	return count;	555	return count;
180	}	556	}
181		557
182	static void *aio_proc(void *arg);	558	static void *aio_proc(void *arg);
183		559
184	static void
185	start_thread (void)	560	static void start_thread (void)
186	{	561	{
187	sigset_t fullsigset, oldsigset;	562	sigset_t fullsigset, oldsigset;
188	pthread_t tid;
189	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");
190		569
191	pthread_attr_init (&attr);	570	pthread_attr_init (&attr);
192	pthread_attr_setstacksize (&attr, STACKSIZE);	571	pthread_attr_setstacksize (&attr, STACKSIZE);
193	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
194		573
195	sigfillset (&fullsigset);	574	sigfillset (&fullsigset);
		575
		576	LOCK (wrklock);
196	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
197		578
198	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;
199	started++;	585	started++;
		586	}
		587	else
		588	free (wrk);
200		589
201	sigprocmask (SIG_SETMASK, &oldsigset, 0);	590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		591	UNLOCK (wrklock);
202	}	592	}
203		593
204	static void	594	static void req_send (aio_req req)
205	send_req (aio_req req)
206	{	595	{
		596	while (started < wanted && nreqs >= started)
		597	start_thread ();
		598
207	nreqs++;	599	++nreqs;
208		600
209	pthread_mutex_lock (&reqlock);	601	LOCK (reqlock);
210		602	reqq_push (&req_queue, req);
211	req->next = 0;
212
213	if (reqe)
214	{
215	reqe->next = req;
216	reqe = req;
217	}
218	else
219	reqe = reqs = req;
220
221	pthread_cond_signal (&reqwait);	603	pthread_cond_signal (&reqwait);
222	pthread_mutex_unlock (&reqlock);	604	UNLOCK (reqlock);
		605	}
223		606
224	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)
225	{	639	{
226	poll_wait ();	640	poll_wait ();
227	poll_cb ();	641	poll_cb ();
228	}	642	}
229	}	643	}
230		644
231	static void	645	static void create_pipe ()
232	end_thread (void)
233	{	646	{
234	aio_req req;	647	if (pipe (respipe))
235	New (0, req, 1, aio_cb);	648	croak ("unable to initialize result pipe");
236	req->type = REQ_QUIT;
237		649
238	send_req (req);	650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
239	}	651	croak ("cannot set result pipe to nonblocking mode");
240		652
241		653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
242	static void min_parallel (int nthreads)	654	croak ("cannot set result pipe to nonblocking mode");
243	{
244	while (nthreads > started)
245	start_thread ();
246	}
247
248	static void max_parallel (int nthreads)
249	{
250	int cur = started;
251	while (cur > nthreads)
252	{
253	end_thread ();
254	cur--;
255	}
256
257	while (started > nthreads)
258	{
259	poll_wait ();
260	poll_cb ();
261	}
262	}
263
264	static int fork_started;
265
266	static void atfork_prepare (void)
267	{
268	pthread_mutex_lock (&frklock);
269
270	fork_started = started;
271
272	for (;;) {
273	while (nreqs)
274	{
275	poll_wait ();
276	poll_cb ();
277	}
278
279	max_parallel (0);
280
281	pthread_mutex_lock (&reqlock);
282
283	if (!nreqs && !started)
284	break;
285
286	pthread_mutex_unlock (&reqlock);
287
288	min_parallel (fork_started);
289	}
290
291	pthread_mutex_lock (&reslock);
292
293	assert (!started);
294	assert (!nreqs);
295	assert (!reqs && !reqe);
296	assert (!ress && !rese);
297	}
298
299	static void atfork_parent (void)
300	{
301	pthread_mutex_unlock (&reslock);
302	min_parallel (fork_started);
303	pthread_mutex_unlock (&reqlock);
304	pthread_mutex_unlock (&frklock);
305	}
306
307	static void atfork_child (void)
308	{
309	reqs = reqe = 0;
310
311	atfork_parent ();
312	}	655	}
313		656
314	/*****************************************************************************/	657	/*****************************************************************************/
315	/* work around various missing functions */	658	/* work around various missing functions */
316		659
…		…
321	/*	664	/*
322	* make our pread/pwrite safe against themselves, but not against	665	* make our pread/pwrite safe against themselves, but not against
323	* normal read/write by using a mutex. slows down execution a lot,	666	* normal read/write by using a mutex. slows down execution a lot,
324	* but that's your problem, not mine.	667	* but that's your problem, not mine.
325	*/	668	*/
326	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
327		670
328	static ssize_t	671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
329	pread (int fd, void *buf, size_t count, off_t offset)
330	{	672	{
331	ssize_t res;	673	ssize_t res;
332	off_t ooffset;	674	off_t ooffset;
333		675
334	pthread_mutex_lock (&iolock);	676	LOCK (preadwritelock);
335	ooffset = lseek (fd, 0, SEEK_CUR);	677	ooffset = lseek (fd, 0, SEEK_CUR);
336	lseek (fd, offset, SEEK_SET);	678	lseek (fd, offset, SEEK_SET);
337	res = read (fd, buf, count);	679	res = read (fd, buf, count);
338	lseek (fd, ooffset, SEEK_SET);	680	lseek (fd, ooffset, SEEK_SET);
339	pthread_mutex_unlock (&iolock);	681	UNLOCK (preadwritelock);
340		682
341	return res;	683	return res;
342	}	684	}
343		685
344	static ssize_t
345	pwrite (int fd, void *buf, size_t count, off_t offset)	686	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
346	{	687	{
347	ssize_t res;	688	ssize_t res;
348	off_t ooffset;	689	off_t ooffset;
349		690
350	pthread_mutex_lock (&iolock);	691	LOCK (preadwritelock);
351	ooffset = lseek (fd, 0, SEEK_CUR);	692	ooffset = lseek (fd, 0, SEEK_CUR);
352	lseek (fd, offset, SEEK_SET);	693	lseek (fd, offset, SEEK_SET);
353	res = write (fd, buf, count);	694	res = write (fd, buf, count);
354	lseek (fd, offset, SEEK_SET);	695	lseek (fd, offset, SEEK_SET);
355	pthread_mutex_unlock (&iolock);	696	UNLOCK (preadwritelock);
356		697
357	return res;	698	return res;
358	}	699	}
359	#endif	700	#endif
360		701
…		…
363	#endif	704	#endif
364		705
365	#if !HAVE_READAHEAD	706	#if !HAVE_READAHEAD
366	# define readahead aio_readahead	707	# define readahead aio_readahead
367		708
368	static char readahead_buf[4096];
369
370	static ssize_t
371	readahead (int fd, off_t offset, size_t count)	709	static ssize_t readahead (int fd, off_t offset, size_t count)
372	{	710	{
		711	dBUF;
		712
373	while (count > 0)	713	while (count > 0)
374	{	714	{
375	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
376		716
377	pread (fd, readahead_buf, len, offset);	717	pread (fd, aio_buf, len, offset);
378	offset += len;	718	offset += len;
379	count -= len;	719	count -= len;
380	}	720	}
381		721
382	errno = 0;	722	errno = 0;
383	}	723	}
384	#endif	724	#endif
385		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
386	/*****************************************************************************/	911	/*****************************************************************************/
387		912
388	static void *
389	aio_proc (void *thr_arg)	913	static void *aio_proc (void *thr_arg)
390	{	914	{
391	aio_req req;	915	aio_req req;
392	int type;	916	int type;
		917	worker *self = (worker *)thr_arg;
393		918
394	do	919	do
395	{	920	{
396	pthread_mutex_lock (&reqlock);	921	LOCK (reqlock);
397		922
398	for (;;)	923	for (;;)
399	{	924	{
400	req = reqs;	925	self->req = req = reqq_shift (&req_queue);
401
402	if (reqs)
403	{
404	reqs = reqs->next;
405	if (!reqs) reqe = 0;
406	}
407		926
408	if (req)	927	if (req)
409	break;	928	break;
410		929
411	pthread_cond_wait (&reqwait, &reqlock);	930	pthread_cond_wait (&reqwait, &reqlock);
412	}	931	}
413		932
414	pthread_mutex_unlock (&reqlock);	933	UNLOCK (reqlock);
415		934
416	errno = 0; /* strictly unnecessary */	935	errno = 0; /* strictly unnecessary */
		936	type = req->type; /* remember type for QUIT check */
417		937
418	type = req->type;	938	if (!(req->flags & FLAG_CANCELLED))
419
420	switch (type)	939	switch (type)
421	{	940	{
422	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;
423	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;
424		943
425	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;
		945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
426		946
427	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
428	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
429	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
430		950
431	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;
432	case REQ_CLOSE: req->result = close (req->fd); break;	952	case REQ_CLOSE: req->result = close (req->fd); break;
433	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
434	case REQ_RMDIR: req->result = rmdir (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;
435	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
436		958
437	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
438	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;
439		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:
440	case REQ_QUIT:	975	case REQ_QUIT:
441	break;	976	break;
442		977
443	default:	978	default:
444	req->result = ENOSYS;	979	req->result = ENOSYS;
445	break;	980	break;
446	}	981	}
447		982
448	req->errorno = errno;	983	req->errorno = errno;
449		984
450	pthread_mutex_lock (&reslock);	985	LOCK (reslock);
451		986
452	req->next = 0;	987	if (!reqq_push (&res_queue, req))
453
454	if (rese)
455	{
456	rese->next = req;
457	rese = req;
458	}
459	else
460	{
461	rese = ress = req;
462
463	/* write a dummy byte to the pipe so fh becomes ready */	988	/* write a dummy byte to the pipe so fh becomes ready */
464	write (respipe [1], &respipe, 1);	989	write (respipe [1], &respipe, 1);
465	}
466		990
467	pthread_mutex_unlock (&reslock);	991	self->req = 0;
		992	worker_clear (self);
		993
		994	UNLOCK (reslock);
468	}	995	}
469	while (type != REQ_QUIT);	996	while (type != REQ_QUIT);
470		997
		998	LOCK (wrklock);
		999	worker_free (self);
		1000	UNLOCK (wrklock);
		1001
471	return 0;	1002	return 0;
		1003	}
		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 ();
472	}	1062	}
473		1063
474	#define dREQ \	1064	#define dREQ \
475	aio_req req; \	1065	aio_req req; \
		1066	int req_pri = next_pri; \
		1067	next_pri = DEFAULT_PRI + PRI_BIAS; \
476	\	1068	\
477	if (SvOK (callback) && !SvROK (callback)) \	1069	if (SvOK (callback) && !SvROK (callback)) \
478	croak ("clalback must be undef or of reference type"); \	1070	croak ("callback must be undef or of reference type"); \
479	\	1071	\
480	Newz (0, req, 1, aio_cb); \	1072	Newz (0, req, 1, aio_cb); \
481	if (!req) \	1073	if (!req) \
482	croak ("out of memory during aio_req allocation"); \	1074	croak ("out of memory during aio_req allocation"); \
483	\	1075	\
484	req->callback = SvREFCNT_inc (callback);	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));
485		1084
486	MODULE = IO::AIO PACKAGE = IO::AIO	1085	MODULE = IO::AIO PACKAGE = IO::AIO
487		1086
488	PROTOTYPES: ENABLE	1087	PROTOTYPES: ENABLE
489		1088
490	BOOT:	1089	BOOT:
491	{	1090	{
492	if (pipe (respipe))	1091	HV *stash = gv_stashpv ("IO::AIO", 1);
493	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));
494		1095
495	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1096	create_pipe ();
496	croak ("cannot set result pipe to nonblocking mode");
497
498	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
499	croak ("cannot set result pipe to nonblocking mode");
500
501	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
502	}	1098	}
503		1099
504	void	1100	void
505	min_parallel(nthreads)	1101	min_parallel (nthreads)
506	int nthreads	1102	int nthreads
507	PROTOTYPE: $	1103	PROTOTYPE: $
508		1104
509	void	1105	void
510	max_parallel(nthreads)	1106	max_parallel (nthreads)
511	int nthreads	1107	int nthreads
512	PROTOTYPE: $	1108	PROTOTYPE: $
513		1109
514	int
515	max_outstanding(nreqs)
516	int nreqs
517	PROTOTYPE: $
518	CODE:
519	RETVAL = max_outstanding;
520	max_outstanding = nreqs;
521
522	void	1110	void
523	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
524	SV * pathname	1112	SV * pathname
525	int flags	1113	int flags
526	int mode	1114	int mode
527	SV * callback	1115	SV * callback
528	PROTOTYPE: $$$;$	1116	PROTOTYPE: $$$;$
529	CODE:	1117	PPCODE:
530	{	1118	{
531	dREQ;	1119	dREQ;
532		1120
533	req->type = REQ_OPEN;	1121	req->type = REQ_OPEN;
534	req->data = newSVsv (pathname);	1122	req->data = newSVsv (pathname);
535	req->dataptr = SvPVbyte_nolen (req->data);	1123	req->dataptr = SvPVbyte_nolen (req->data);
536	req->fd = flags;	1124	req->fd = flags;
537	req->mode = mode;	1125	req->mode = mode;
538		1126
539	send_req (req);	1127	REQ_SEND;
540	}	1128	}
541		1129
542	void	1130	void
543	aio_close(fh,callback=&PL_sv_undef)	1131	aio_close (fh,callback=&PL_sv_undef)
544	SV * fh	1132	SV * fh
545	SV * callback	1133	SV * callback
546	PROTOTYPE: $;$	1134	PROTOTYPE: $;$
547	ALIAS:	1135	ALIAS:
548	aio_close = REQ_CLOSE	1136	aio_close = REQ_CLOSE
549	aio_fsync = REQ_FSYNC	1137	aio_fsync = REQ_FSYNC
550	aio_fdatasync = REQ_FDATASYNC	1138	aio_fdatasync = REQ_FDATASYNC
551	CODE:	1139	PPCODE:
552	{	1140	{
553	dREQ;	1141	dREQ;
554		1142
555	req->type = ix;	1143	req->type = ix;
556	req->fh = newSVsv (fh);	1144	req->fh = newSVsv (fh);
557	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
558		1146
559	send_req (req);	1147	REQ_SEND (req);
560	}	1148	}
561		1149
562	void	1150	void
563	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1151	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
564	SV * fh	1152	SV * fh
565	UV offset	1153	UV offset
566	IV length	1154	UV length
567	SV * data	1155	SV * data
568	IV dataoffset	1156	UV dataoffset
569	SV * callback	1157	SV * callback
570	ALIAS:	1158	ALIAS:
571	aio_read = REQ_READ	1159	aio_read = REQ_READ
572	aio_write = REQ_WRITE	1160	aio_write = REQ_WRITE
573	PROTOTYPE: $$$$$;$	1161	PROTOTYPE: $$$$$;$
574	CODE:	1162	PPCODE:
575	{	1163	{
576	aio_req req;	1164	aio_req req;
577	STRLEN svlen;	1165	STRLEN svlen;
578	char *svptr = SvPVbyte (data, svlen);	1166	char *svptr = SvPVbyte (data, svlen);
579		1167
…		…
610	: IoOFP (sv_2io (fh)));	1198	: IoOFP (sv_2io (fh)));
611	req->offset = offset;	1199	req->offset = offset;
612	req->length = length;	1200	req->length = length;
613	req->data = SvREFCNT_inc (data);	1201	req->data = SvREFCNT_inc (data);
614	req->dataptr = (char *)svptr + dataoffset;	1202	req->dataptr = (char *)svptr + dataoffset;
615	req->callback = SvREFCNT_inc (callback);
616		1203
617	send_req (req);	1204	if (!SvREADONLY (data))
		1205	{
		1206	SvREADONLY_on (data);
		1207	req->data2ptr = (void *)data;
		1208	}
		1209
		1210	REQ_SEND;
618	}	1211	}
619	}	1212	}
620		1213
621	void	1214	void
		1215	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1216	SV * out_fh
		1217	SV * in_fh
		1218	UV in_offset
		1219	UV length
		1220	SV * callback
		1221	PROTOTYPE: $$$$;$
		1222	PPCODE:
		1223	{
		1224	dREQ;
		1225
		1226	req->type = REQ_SENDFILE;
		1227	req->fh = newSVsv (out_fh);
		1228	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1229	req->fh2 = newSVsv (in_fh);
		1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1231	req->offset = in_offset;
		1232	req->length = length;
		1233
		1234	REQ_SEND;
		1235	}
		1236
		1237	void
622	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
623	SV * fh	1239	SV * fh
624	UV offset	1240	UV offset
625	IV length	1241	IV length
626	SV * callback	1242	SV * callback
627	PROTOTYPE: $$$;$	1243	PROTOTYPE: $$$;$
628	CODE:	1244	PPCODE:
629	{	1245	{
630	dREQ;	1246	dREQ;
631		1247
632	req->type = REQ_READAHEAD;	1248	req->type = REQ_READAHEAD;
633	req->fh = newSVsv (fh);	1249	req->fh = newSVsv (fh);
634	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
635	req->offset = offset;	1251	req->offset = offset;
636	req->length = length;	1252	req->length = length;
637		1253
638	send_req (req);	1254	REQ_SEND;
639	}	1255	}
640		1256
641	void	1257	void
642	aio_stat(fh_or_path,callback=&PL_sv_undef)	1258	aio_stat (fh_or_path,callback=&PL_sv_undef)
643	SV * fh_or_path	1259	SV * fh_or_path
644	SV * callback	1260	SV * callback
645	ALIAS:	1261	ALIAS:
646	aio_stat = REQ_STAT	1262	aio_stat = REQ_STAT
647	aio_lstat = REQ_LSTAT	1263	aio_lstat = REQ_LSTAT
648	CODE:	1264	PPCODE:
649	{	1265	{
650	dREQ;	1266	dREQ;
651		1267
652	New (0, req->statdata, 1, Stat_t);	1268	New (0, req->statdata, 1, Stat_t);
653	if (!req->statdata)	1269	if (!req->statdata)
		1270	{
		1271	req_free (req);
654	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");	1272	croak ("out of memory during aio_req->statdata allocation");
		1273	}
655		1274
656	if (SvPOK (fh_or_path))	1275	if (SvPOK (fh_or_path))
657	{	1276	{
658	req->type = ix;	1277	req->type = ix;
659	req->data = newSVsv (fh_or_path);	1278	req->data = newSVsv (fh_or_path);
…		…
664	req->type = REQ_FSTAT;	1283	req->type = REQ_FSTAT;
665	req->fh = newSVsv (fh_or_path);	1284	req->fh = newSVsv (fh_or_path);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
667	}	1286	}
668		1287
669	send_req (req);	1288	REQ_SEND;
670	}	1289	}
671		1290
672	void	1291	void
673	aio_unlink(pathname,callback=&PL_sv_undef)	1292	aio_unlink (pathname,callback=&PL_sv_undef)
674	SV * pathname	1293	SV * pathname
675	SV * callback	1294	SV * callback
676	ALIAS:	1295	ALIAS:
677	aio_unlink = REQ_UNLINK	1296	aio_unlink = REQ_UNLINK
678	aio_rmdir = REQ_RMDIR	1297	aio_rmdir = REQ_RMDIR
		1298	aio_readdir = REQ_READDIR
679	CODE:	1299	PPCODE:
680	{	1300	{
681	dREQ;	1301	dREQ;
682		1302
683	req->type = ix;	1303	req->type = ix;
684	req->data = newSVsv (pathname);	1304	req->data = newSVsv (pathname);
685	req->dataptr = SvPVbyte_nolen (req->data);	1305	req->dataptr = SvPVbyte_nolen (req->data);
686		1306
687	send_req (req);	1307	REQ_SEND;
688	}	1308	}
689		1309
690	void	1310	void
691	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)
692	SV * oldpath	1312	SV * oldpath
693	SV * newpath	1313	SV * newpath
694	SV * callback	1314	SV * callback
		1315	ALIAS:
		1316	aio_link = REQ_LINK
		1317	aio_symlink = REQ_SYMLINK
		1318	aio_rename = REQ_RENAME
695	CODE:	1319	PPCODE:
696	{	1320	{
697	dREQ;	1321	dREQ;
698		1322
699	req->type = REQ_SYMLINK;	1323	req->type = ix;
700	req->fh = newSVsv (oldpath);	1324	req->fh = newSVsv (oldpath);
701	req->data2ptr = SvPVbyte_nolen (req->fh);	1325	req->data2ptr = SvPVbyte_nolen (req->fh);
702	req->data = newSVsv (newpath);	1326	req->data = newSVsv (newpath);
703	req->dataptr = SvPVbyte_nolen (req->data);	1327	req->dataptr = SvPVbyte_nolen (req->data);
704		1328
705	send_req (req);	1329	REQ_SEND;
706	}	1330	}
707		1331
708	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
709	flush()	1389	flush ()
710	PROTOTYPE:	1390	PROTOTYPE:
711	CODE:	1391	CODE:
712	while (nreqs)	1392	while (nreqs)
713	{	1393	{
714	poll_wait ();	1394	poll_wait ();
…		…
754	CODE:	1434	CODE:
755	RETVAL = nreqs;	1435	RETVAL = nreqs;
756	OUTPUT:	1436	OUTPUT:
757	RETVAL	1437	RETVAL
758		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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