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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.27 by root, Wed Aug 17 04:47:02 2005 UTC vs.
Revision 1.78 by root, Thu Oct 26 14:35:34 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux && !defined(_GNU_SOURCE)
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	/* just in case */
1	#define _REENTRANT 1	9	#define _REENTRANT 1
		10
2	#include <errno.h>	11	#include <errno.h>
3		12
4	#include "EXTERN.h"	13	#include "EXTERN.h"
5	#include "perl.h"	14	#include "perl.h"
6	#include "XSUB.h"	15	#include "XSUB.h"
7		16
8	#include "autoconf/config.h"	17	#include "autoconf/config.h"
9		18
		19	#include <pthread.h>
		20
		21	#include <stddef.h>
		22	#include <errno.h>
		23	#include <sys/time.h>
		24	#include <sys/select.h>
10	#include <sys/types.h>	25	#include <sys/types.h>
11	#include <sys/stat.h>	26	#include <sys/stat.h>
12		27	#include <limits.h>
13	#include <unistd.h>	28	#include <unistd.h>
14	#include <fcntl.h>	29	#include <fcntl.h>
15	#include <signal.h>	30	#include <signal.h>
16	#include <sched.h>	31	#include <sched.h>
17		32
18	#include <pthread.h>	33	#if HAVE_SENDFILE
		34	# if __linux
		35	# include <sys/sendfile.h>
		36	# elif __freebsd
		37	# include <sys/socket.h>
		38	# include <sys/uio.h>
		39	# elif __hpux
		40	# include <sys/socket.h>
		41	# elif __solaris /* not yet */
		42	# include <sys/sendfile.h>
		43	# else
		44	# error sendfile support requested but not available
		45	# endif
		46	#endif
19		47
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	48	/* used for struct dirent, AIX doesn't provide it */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	49	#ifndef NAME_MAX
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	50	# define NAME_MAX 4096
		51	#endif
		52
		53	#ifndef PTHREAD_STACK_MIN
		54	/* care for broken platforms, e.g. windows */
		55	# define PTHREAD_STACK_MIN 16384
		56	#endif
23		57
24	#if __ia64	58	#if __ia64
25	# define STACKSIZE 65536	59	# define STACKSIZE 65536
		60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		61	# define STACKSIZE PTHREAD_STACK_MIN
26	#else	62	#else
27	# define STACKSIZE 4096	63	# define STACKSIZE 16384
28	#endif	64	#endif
		65
		66	/* buffer size for various temporary buffers */
		67	#define AIO_BUFSIZE 65536
		68
		69	#define dBUF \
		70	char *aio_buf; \
		71	LOCK (wrklock); \
		72	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		73	UNLOCK (wrklock); \
		74	if (!aio_buf) \
		75	return -1;
29		76
30	enum {	77	enum {
31	REQ_QUIT,	78	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	79	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	80	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		81	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	82	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	83	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,	84	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37	REQ_SYMLINK,	85	REQ_READDIR,
		86	REQ_LINK, REQ_SYMLINK,
		87	REQ_GROUP, REQ_NOP,
		88	REQ_BUSY,
38	};	89	};
39		90
		91	#define AIO_REQ_KLASS "IO::AIO::REQ"
		92	#define AIO_GRP_KLASS "IO::AIO::GRP"
		93
40	typedef struct aio_cb {	94	typedef struct aio_cb
		95	{
41	struct aio_cb *volatile next;	96	struct aio_cb *volatile next;
42		97
43	int type;	98	SV *data, *callback;
44		99	SV *fh, *fh2;
45	int fd;	100	void *dataptr, *data2ptr;
		101	Stat_t *statdata;
46	off_t offset;	102	off_t offset;
47	size_t length;	103	size_t length;
48	ssize_t result;	104	ssize_t result;
		105
		106	STRLEN dataoffset;
		107	int type;
		108	int fd, fd2;
		109	int errorno;
49	mode_t mode; /* open */	110	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54		111
55	Stat_t *statdata;	112	unsigned char flags;
		113	unsigned char pri;
		114
		115	SV *self; /* the perl counterpart of this request, if any */
		116	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
56	} aio_cb;	117	} aio_cb;
57		118
		119	enum {
		120	FLAG_CANCELLED = 0x01,
		121	};
		122
58	typedef aio_cb *aio_req;	123	typedef aio_cb *aio_req;
		124	typedef aio_cb *aio_req_ornot;
59		125
60	static int started;	126	enum {
		127	PRI_MIN = -4,
		128	PRI_MAX = 4,
		129
		130	DEFAULT_PRI = 0,
		131	PRI_BIAS = -PRI_MIN,
		132	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		133	};
		134
		135	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		136
		137	static unsigned int started, wanted;
61	static volatile int nreqs;	138	static volatile unsigned int nreqs;
62	static int max_outstanding = 1<<30;	139	static volatile unsigned int max_outstanding = 0xffffffff;
63	static int respipe [2];	140	static int respipe [2];
64		141
		142	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		143	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		144	#else
		145	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		146	#endif
		147
		148	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		149	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		150
		151	/* worker threads management */
		152	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		153
		154	typedef struct worker {
		155	/* locked by wrklock */
		156	struct worker *prev, *next;
		157
		158	pthread_t tid;
		159
		160	/* locked by reslock, reqlock or wrklock */
		161	aio_req req; /* currently processed request */
		162	void *dbuf;
		163	DIR *dirp;
		164	} worker;
		165
		166	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		167
		168	static void worker_clear (worker *wrk)
		169	{
		170	if (wrk->dirp)
		171	{
		172	closedir (wrk->dirp);
		173	wrk->dirp = 0;
		174	}
		175
		176	if (wrk->dbuf)
		177	{
		178	free (wrk->dbuf);
		179	wrk->dbuf = 0;
		180	}
		181	}
		182
		183	static void worker_free (worker *wrk)
		184	{
		185	wrk->next->prev = wrk->prev;
		186	wrk->prev->next = wrk->next;
		187
		188	free (wrk);
		189	}
		190
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	191	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	192	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	193	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		194
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	195	/*
70	static volatile aio_req ress, rese; /* queue start, queue end */	196	* a somewhat faster data structure might be nice, but
		197	* with 8 priorities this actually needs <20 insns
		198	* per shift, the most expensive operation.
		199	*/
		200	typedef struct {
		201	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		202	int size;
		203	} reqq;
71		204
		205	static reqq req_queue;
		206	static reqq res_queue;
		207
		208	int reqq_push (reqq *q, aio_req req)
		209	{
		210	int pri = req->pri;
		211	req->next = 0;
		212
		213	if (q->qe[pri])
		214	{
		215	q->qe[pri]->next = req;
		216	q->qe[pri] = req;
		217	}
		218	else
		219	q->qe[pri] = q->qs[pri] = req;
		220
		221	return q->size++;
		222	}
		223
		224	aio_req reqq_shift (reqq *q)
		225	{
		226	int pri;
		227
		228	if (!q->size)
		229	return 0;
		230
		231	--q->size;
		232
		233	for (pri = NUM_PRI; pri--; )
		234	{
		235	aio_req req = q->qs[pri];
		236
		237	if (req)
		238	{
		239	if (!(q->qs[pri] = req->next))
		240	q->qe[pri] = 0;
		241
		242	return req;
		243	}
		244	}
		245
		246	abort ();
		247	}
		248
		249	static int poll_cb (int max);
		250	static void req_invoke (aio_req req);
72	static void free_req (aio_req req)	251	static void req_free (aio_req req);
73	{	252	static void req_cancel (aio_req req);
74	if (req->data)
75	SvREFCNT_dec (req->data);
76		253
		254	/* must be called at most once */
		255	static SV *req_sv (aio_req req, const char *klass)
		256	{
77	if (req->fh)	257	if (!req->self)
		258	{
		259	req->self = (SV *)newHV ();
		260	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		261	}
		262
		263	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		264	}
		265
		266	static aio_req SvAIO_REQ (SV *sv)
		267	{
		268	MAGIC *mg;
		269
		270	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		271	croak ("object of class " AIO_REQ_KLASS " expected");
		272
		273	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		274
		275	return mg ? (aio_req)mg->mg_ptr : 0;
		276	}
		277
		278	static void aio_grp_feed (aio_req grp)
		279	{
		280	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		281	{
		282	int old_len = grp->length;
		283
		284	if (grp->fh2 && SvOK (grp->fh2))
		285	{
		286	dSP;
		287
		288	ENTER;
		289	SAVETMPS;
		290	PUSHMARK (SP);
		291	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		292	PUTBACK;
		293	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		294	SPAGAIN;
		295	FREETMPS;
		296	LEAVE;
		297	}
		298
		299	/* stop if no progress has been made */
		300	if (old_len == grp->length)
		301	{
78	SvREFCNT_dec (req->fh);	302	SvREFCNT_dec (grp->fh2);
79		303	grp->fh2 = 0;
80	if (req->statdata)	304	break;
81	Safefree (req->statdata);	305	}
82
83	if (req->callback)
84	SvREFCNT_dec (req->callback);
85
86	Safefree (req);
87	}
88
89	static void
90	poll_wait ()
91	{
92	if (nreqs && !ress)
93	{	306	}
		307	}
		308
		309	static void aio_grp_dec (aio_req grp)
		310	{
		311	--grp->length;
		312
		313	/* call feeder, if applicable */
		314	aio_grp_feed (grp);
		315
		316	/* finish, if done */
		317	if (!grp->length && grp->fd)
		318	{
		319	req_invoke (grp);
		320	req_free (grp);
		321	}
		322	}
		323
		324	static void poll_wait ()
		325	{
94	fd_set rfd;	326	fd_set rfd;
		327
		328	while (nreqs)
		329	{
		330	int size;
		331	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		332	LOCK (reslock);
		333	#endif
		334	size = res_queue.size;
		335	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		336	UNLOCK (reslock);
		337	#endif
		338
		339	if (size)
		340	return;
		341
95	FD_ZERO(&rfd);	342	FD_ZERO(&rfd);
96	FD_SET(respipe [0], &rfd);	343	FD_SET(respipe [0], &rfd);
97		344
98	select (respipe [0] + 1, &rfd, 0, 0, 0);	345	select (respipe [0] + 1, &rfd, 0, 0, 0);
99	}	346	}
100	}	347	}
101		348
102	static int	349	static void req_invoke (aio_req req)
103	poll_cb ()	350	{
		351	dSP;
		352
		353	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		354	{
		355	errno = req->errorno;
		356
		357	ENTER;
		358	SAVETMPS;
		359	PUSHMARK (SP);
		360	EXTEND (SP, 1);
		361
		362	switch (req->type)
		363	{
		364	case REQ_READDIR:
		365	{
		366	SV *rv = &PL_sv_undef;
		367
		368	if (req->result >= 0)
		369	{
		370	int i;
		371	char *buf = req->data2ptr;
		372	AV *av = newAV ();
		373
		374	av_extend (av, req->result - 1);
		375
		376	for (i = 0; i < req->result; ++i)
		377	{
		378	SV *sv = newSVpv (buf, 0);
		379
		380	av_store (av, i, sv);
		381	buf += SvCUR (sv) + 1;
		382	}
		383
		384	rv = sv_2mortal (newRV_noinc ((SV *)av));
		385	}
		386
		387	PUSHs (rv);
		388	}
		389	break;
		390
		391	case REQ_OPEN:
		392	{
		393	/* convert fd to fh */
		394	SV *fh;
		395
		396	PUSHs (sv_2mortal (newSViv (req->result)));
		397	PUTBACK;
		398	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		399	SPAGAIN;
		400
		401	fh = SvREFCNT_inc (POPs);
		402
		403	PUSHMARK (SP);
		404	XPUSHs (sv_2mortal (fh));
		405	}
		406	break;
		407
		408	case REQ_GROUP:
		409	req->fd = 2; /* mark group as finished */
		410
		411	if (req->data)
		412	{
		413	int i;
		414	AV *av = (AV *)req->data;
		415
		416	EXTEND (SP, AvFILL (av) + 1);
		417	for (i = 0; i <= AvFILL (av); ++i)
		418	PUSHs (*av_fetch (av, i, 0));
		419	}
		420	break;
		421
		422	case REQ_NOP:
		423	case REQ_BUSY:
		424	break;
		425
		426	default:
		427	PUSHs (sv_2mortal (newSViv (req->result)));
		428	break;
		429	}
		430
		431
		432	PUTBACK;
		433	call_sv (req->callback, G_VOID | G_EVAL);
		434	SPAGAIN;
		435
		436	FREETMPS;
		437	LEAVE;
		438	}
		439
		440	if (req->grp)
		441	{
		442	aio_req grp = req->grp;
		443
		444	/* unlink request */
		445	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		446	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		447
		448	if (grp->grp_first == req)
		449	grp->grp_first = req->grp_next;
		450
		451	aio_grp_dec (grp);
		452	}
		453
		454	if (SvTRUE (ERRSV))
		455	{
		456	req_free (req);
		457	croak (0);
		458	}
		459	}
		460
		461	static void req_free (aio_req req)
		462	{
		463	if (req->self)
		464	{
		465	sv_unmagic (req->self, PERL_MAGIC_ext);
		466	SvREFCNT_dec (req->self);
		467	}
		468
		469	SvREFCNT_dec (req->data);
		470	SvREFCNT_dec (req->fh);
		471	SvREFCNT_dec (req->fh2);
		472	SvREFCNT_dec (req->callback);
		473	Safefree (req->statdata);
		474
		475	if (req->type == REQ_READDIR)
		476	free (req->data2ptr);
		477
		478	Safefree (req);
		479	}
		480
		481	static void req_cancel_subs (aio_req grp)
		482	{
		483	aio_req sub;
		484
		485	if (grp->type != REQ_GROUP)
		486	return;
		487
		488	SvREFCNT_dec (grp->fh2);
		489	grp->fh2 = 0;
		490
		491	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		492	req_cancel (sub);
		493	}
		494
		495	static void req_cancel (aio_req req)
		496	{
		497	req->flags |= FLAG_CANCELLED;
		498
		499	req_cancel_subs (req);
		500	}
		501
		502	static int poll_cb (int max)
104	{	503	{
105	dSP;	504	dSP;
106	int count = 0;	505	int count = 0;
107	int do_croak = 0;	506	int do_croak = 0;
108	aio_req req;	507	aio_req req;
109		508
110	for (;;)	509	for (;;)
111	{	510	{
112	pthread_mutex_lock (&reslock);	511	while (max <= 0 || count < max)
113	req = ress;
114
115	if (req)
116	{	512	{
117	ress = req->next;	513	LOCK (reslock);
		514	req = reqq_shift (&res_queue);
118		515
119	if (!ress)	516	if (req)
120	{	517	{
121	rese = 0;	518	if (!res_queue.size)
122
123	/* read any signals sent by the worker threads */
124	char buf [32];
125	while (read (respipe [0], buf, 32) == 32)
126	;
127	}
128	}
129
130	pthread_mutex_unlock (&reslock);
131
132	if (!req)
133	break;
134
135	nreqs--;
136
137	if (req->type == REQ_QUIT)
138	started--;
139	else
140	{
141	int errorno = errno;
142	errno = req->errorno;
143
144	if (req->type == REQ_READ)
145	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
146
147	if (req->statdata)
148	{
149	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
150	PL_laststatval = req->result;
151	PL_statcache = *(req->statdata);
152	}
153
154	ENTER;
155	PUSHMARK (SP);
156	XPUSHs (sv_2mortal (newSViv (req->result)));
157
158	if (req->type == REQ_OPEN)
159	{
160	/* convert fd to fh */
161	SV *fh;
162
163	PUTBACK;
164	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
165	SPAGAIN;
166
167	fh = SvREFCNT_inc (POPs);
168
169	PUSHMARK (SP);
170	XPUSHs (sv_2mortal (fh));
171	}
172
173	if (SvOK (req->callback))
174	{
175	PUTBACK;
176	call_sv (req->callback, G_VOID | G_EVAL);
177	SPAGAIN;
178
179	if (SvTRUE (ERRSV))
180	{	519	{
181	free_req (req);	520	/* read any signals sent by the worker threads */
		521	char buf [32];
		522	while (read (respipe [0], buf, 32) == 32)
182	croak (0);	523	;
183	}	524	}
184	}	525	}
185		526
186	LEAVE;	527	UNLOCK (reslock);
187		528
188	errno = errorno;	529	if (!req)
		530	break;
		531
		532	--nreqs;
		533
		534	if (req->type == REQ_QUIT)
		535	--started;
		536	else if (req->type == REQ_GROUP && req->length)
		537	{
		538	req->fd = 1; /* mark request as delayed */
		539	continue;
		540	}
		541	else
		542	{
		543	if (req->type == REQ_READ)
		544	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
		545
		546	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		547	SvREADONLY_off (req->data);
		548
		549	if (req->statdata)
		550	{
		551	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
		552	PL_laststatval = req->result;
		553	PL_statcache = *(req->statdata);
		554	}
		555
		556	req_invoke (req);
		557
189	count++;	558	count++;
		559	}
		560
		561	req_free (req);
190	}	562	}
191		563
192	free_req (req);	564	if (nreqs <= max_outstanding)
		565	break;
		566
		567	poll_wait ();
		568
		569	max = 0;
193	}	570	}
194		571
195	return count;	572	return count;
196	}	573	}
197		574
198	static void *aio_proc(void *arg);	575	static void *aio_proc(void *arg);
199		576
200	static void
201	start_thread (void)	577	static void start_thread (void)
202	{	578	{
203	sigset_t fullsigset, oldsigset;	579	sigset_t fullsigset, oldsigset;
204	pthread_t tid;
205	pthread_attr_t attr;	580	pthread_attr_t attr;
		581
		582	worker *wrk = calloc (1, sizeof (worker));
		583
		584	if (!wrk)
		585	croak ("unable to allocate worker thread data");
206		586
207	pthread_attr_init (&attr);	587	pthread_attr_init (&attr);
208	pthread_attr_setstacksize (&attr, STACKSIZE);	588	pthread_attr_setstacksize (&attr, STACKSIZE);
209	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	589	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
210		590
211	sigfillset (&fullsigset);	591	sigfillset (&fullsigset);
		592
		593	LOCK (wrklock);
212	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	594	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
213		595
214	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	596	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		597	{
		598	wrk->prev = &wrk_first;
		599	wrk->next = wrk_first.next;
		600	wrk_first.next->prev = wrk;
		601	wrk_first.next = wrk;
215	started++;	602	++started;
		603	}
		604	else
		605	free (wrk);
216		606
217	sigprocmask (SIG_SETMASK, &oldsigset, 0);	607	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		608	UNLOCK (wrklock);
218	}	609	}
219		610
220	static void	611	static void req_send (aio_req req)
221	send_req (aio_req req)
222	{	612	{
		613	while (started < wanted && nreqs >= started)
		614	start_thread ();
		615
223	nreqs++;	616	++nreqs;
224		617
225	pthread_mutex_lock (&reqlock);	618	LOCK (reqlock);
226		619	reqq_push (&req_queue, req);
227	req->next = 0;
228
229	if (reqe)
230	{
231	reqe->next = req;
232	reqe = req;
233	}
234	else
235	reqe = reqs = req;
236
237	pthread_cond_signal (&reqwait);	620	pthread_cond_signal (&reqwait);
238	pthread_mutex_unlock (&reqlock);	621	UNLOCK (reqlock);
239
240	if (nreqs > max_outstanding)
241	for (;;)
242	{
243	poll_cb ();
244
245	if (nreqs <= max_outstanding)
246	break;
247
248	poll_wait ();
249	}
250	}	622	}
251		623
252	static void	624	static void end_thread (void)
253	end_thread (void)
254	{	625	{
255	aio_req req;	626	aio_req req;
		627
256	Newz (0, req, 1, aio_cb);	628	Newz (0, req, 1, aio_cb);
		629
257	req->type = REQ_QUIT;	630	req->type = REQ_QUIT;
		631	req->pri = PRI_MAX + PRI_BIAS;
258		632
259	send_req (req);	633	req_send (req);
260	}	634	}
261		635
262	static void min_parallel (int nthreads)	636	static void min_parallel (int nthreads)
263	{	637	{
264	while (nthreads > started)	638	if (wanted < nthreads)
265	start_thread ();	639	wanted = nthreads;
266	}	640	}
267		641
268	static void max_parallel (int nthreads)	642	static void max_parallel (int nthreads)
269	{	643	{
270	int cur = started;	644	int cur = started;
271		645
		646	if (wanted > nthreads)
		647	wanted = nthreads;
		648
272	while (cur > nthreads)	649	while (cur > wanted)
273	{	650	{
274	end_thread ();	651	end_thread ();
275	cur--;	652	cur--;
276	}	653	}
277		654
278	while (started > nthreads)	655	while (started > wanted)
279	{	656	{
280	poll_wait ();	657	poll_wait ();
281	poll_cb ();	658	poll_cb (0);
282	}	659	}
283	}	660	}
284		661
285	static void create_pipe ()	662	static void create_pipe ()
286	{	663	{
…		…
290	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	667	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
291	croak ("cannot set result pipe to nonblocking mode");	668	croak ("cannot set result pipe to nonblocking mode");
292		669
293	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	670	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
294	croak ("cannot set result pipe to nonblocking mode");	671	croak ("cannot set result pipe to nonblocking mode");
295	}
296
297	static void atfork_prepare (void)
298	{
299	for (;;) {
300
301	for (;;)
302	{
303	poll_cb ();
304
305	if (!nreqs)
306	break;
307
308	poll_wait ();
309	}
310
311	pthread_mutex_lock (&reqlock);
312
313	if (!nreqs)
314	break;
315
316	pthread_mutex_unlock (&reqlock);
317	}
318
319	pthread_mutex_lock (&reslock);
320
321	assert (!nreqs && !reqs && !ress);
322	}
323
324	static void atfork_parent (void)
325	{
326	pthread_mutex_unlock (&reslock);
327	pthread_mutex_unlock (&reqlock);
328	}
329
330	static void atfork_child (void)
331	{
332	int restart = started;
333	started = 0;
334
335	atfork_parent ();
336
337	min_parallel (restart);
338	}	672	}
339		673
340	/*****************************************************************************/	674	/*****************************************************************************/
341	/* work around various missing functions */	675	/* work around various missing functions */
342		676
…		…
347	/*	681	/*
348	* make our pread/pwrite safe against themselves, but not against	682	* make our pread/pwrite safe against themselves, but not against
349	* normal read/write by using a mutex. slows down execution a lot,	683	* normal read/write by using a mutex. slows down execution a lot,
350	* but that's your problem, not mine.	684	* but that's your problem, not mine.
351	*/	685	*/
352	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	686	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
353		687
354	static ssize_t	688	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
355	pread (int fd, void *buf, size_t count, off_t offset)
356	{	689	{
357	ssize_t res;	690	ssize_t res;
358	off_t ooffset;	691	off_t ooffset;
359		692
360	pthread_mutex_lock (&iolock);	693	LOCK (preadwritelock);
361	ooffset = lseek (fd, 0, SEEK_CUR);	694	ooffset = lseek (fd, 0, SEEK_CUR);
362	lseek (fd, offset, SEEK_SET);	695	lseek (fd, offset, SEEK_SET);
363	res = read (fd, buf, count);	696	res = read (fd, buf, count);
364	lseek (fd, ooffset, SEEK_SET);	697	lseek (fd, ooffset, SEEK_SET);
365	pthread_mutex_unlock (&iolock);	698	UNLOCK (preadwritelock);
366		699
367	return res;	700	return res;
368	}	701	}
369		702
370	static ssize_t
371	pwrite (int fd, void *buf, size_t count, off_t offset)	703	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
372	{	704	{
373	ssize_t res;	705	ssize_t res;
374	off_t ooffset;	706	off_t ooffset;
375		707
376	pthread_mutex_lock (&iolock);	708	LOCK (preadwritelock);
377	ooffset = lseek (fd, 0, SEEK_CUR);	709	ooffset = lseek (fd, 0, SEEK_CUR);
378	lseek (fd, offset, SEEK_SET);	710	lseek (fd, offset, SEEK_SET);
379	res = write (fd, buf, count);	711	res = write (fd, buf, count);
380	lseek (fd, offset, SEEK_SET);	712	lseek (fd, offset, SEEK_SET);
381	pthread_mutex_unlock (&iolock);	713	UNLOCK (preadwritelock);
382		714
383	return res;	715	return res;
384	}	716	}
385	#endif	717	#endif
386		718
387	#if !HAVE_FDATASYNC	719	#if !HAVE_FDATASYNC
388	# define fdatasync fsync	720	# define fdatasync fsync
389	#endif	721	#endif
390		722
391	#if !HAVE_READAHEAD	723	#if !HAVE_READAHEAD
392	# define readahead aio_readahead	724	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
393		725
394	static char readahead_buf[4096];	726	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
395
396	static ssize_t
397	readahead (int fd, off_t offset, size_t count)
398	{	727	{
		728	dBUF;
		729
399	while (count > 0)	730	while (count > 0)
400	{	731	{
401	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	732	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
402		733
403	pread (fd, readahead_buf, len, offset);	734	pread (fd, aio_buf, len, offset);
404	offset += len;	735	offset += len;
405	count -= len;	736	count -= len;
406	}	737	}
407		738
408	errno = 0;	739	errno = 0;
409	}	740	}
		741
		742	#endif
		743
		744	#if !HAVE_READDIR_R
		745	# define readdir_r aio_readdir_r
		746
		747	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		748
		749	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		750	{
		751	struct dirent *e;
		752	int errorno;
		753
		754	LOCK (readdirlock);
		755
		756	e = readdir (dirp);
		757	errorno = errno;
		758
		759	if (e)
		760	{
		761	*res = ent;
		762	strcpy (ent->d_name, e->d_name);
		763	}
		764	else
		765	*res = 0;
		766
		767	UNLOCK (readdirlock);
		768
		769	errno = errorno;
		770	return e ? 0 : -1;
		771	}
		772	#endif
		773
		774	/* sendfile always needs emulation */
		775	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		776	{
		777	ssize_t res;
		778
		779	if (!count)
		780	return 0;
		781
		782	#if HAVE_SENDFILE
		783	# if __linux
		784	res = sendfile (ofd, ifd, &offset, count);
		785
		786	# elif __freebsd
		787	/*
		788	* Of course, the freebsd sendfile is a dire hack with no thoughts
		789	* wasted on making it similar to other I/O functions.
		790	*/
		791	{
		792	off_t sbytes;
		793	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		794
		795	if (res < 0 && sbytes)
		796	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
		797	res = sbytes;
		798	}
		799
		800	# elif __hpux
		801	res = sendfile (ofd, ifd, offset, count, 0, 0);
		802
		803	# elif __solaris
		804	{
		805	struct sendfilevec vec;
		806	size_t sbytes;
		807
		808	vec.sfv_fd = ifd;
		809	vec.sfv_flag = 0;
		810	vec.sfv_off = offset;
		811	vec.sfv_len = count;
		812
		813	res = sendfilev (ofd, &vec, 1, &sbytes);
		814
		815	if (res < 0 && sbytes)
		816	res = sbytes;
		817	}
		818
410	#endif	819	# endif
		820	#else
		821	res = -1;
		822	errno = ENOSYS;
		823	#endif
		824
		825	if (res < 0
		826	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		827	#if __solaris
		828	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		829	#endif
		830	)
		831	)
		832	{
		833	/* emulate sendfile. this is a major pain in the ass */
		834	dBUF;
		835
		836	res = 0;
		837
		838	while (count)
		839	{
		840	ssize_t cnt;
		841
		842	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		843
		844	if (cnt <= 0)
		845	{
		846	if (cnt && !res) res = -1;
		847	break;
		848	}
		849
		850	cnt = write (ofd, aio_buf, cnt);
		851
		852	if (cnt <= 0)
		853	{
		854	if (cnt && !res) res = -1;
		855	break;
		856	}
		857
		858	offset += cnt;
		859	res += cnt;
		860	count -= cnt;
		861	}
		862	}
		863
		864	return res;
		865	}
		866
		867	/* read a full directory */
		868	static void scandir_ (aio_req req, worker *self)
		869	{
		870	DIR *dirp;
		871	union
		872	{
		873	struct dirent d;
		874	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		875	} *u;
		876	struct dirent *entp;
		877	char *name, *names;
		878	int memlen = 4096;
		879	int memofs = 0;
		880	int res = 0;
		881	int errorno;
		882
		883	LOCK (wrklock);
		884	self->dirp = dirp = opendir (req->dataptr);
		885	self->dbuf = u = malloc (sizeof (*u));
		886	req->data2ptr = names = malloc (memlen);
		887	UNLOCK (wrklock);
		888
		889	if (dirp && u && names)
		890	for (;;)
		891	{
		892	errno = 0;
		893	readdir_r (dirp, &u->d, &entp);
		894
		895	if (!entp)
		896	break;
		897
		898	name = entp->d_name;
		899
		900	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		901	{
		902	int len = strlen (name) + 1;
		903
		904	res++;
		905
		906	while (memofs + len > memlen)
		907	{
		908	memlen *= 2;
		909	LOCK (wrklock);
		910	req->data2ptr = names = realloc (names, memlen);
		911	UNLOCK (wrklock);
		912
		913	if (!names)
		914	break;
		915	}
		916
		917	memcpy (names + memofs, name, len);
		918	memofs += len;
		919	}
		920	}
		921
		922	if (errno)
		923	res = -1;
		924
		925	req->result = res;
		926	}
411		927
412	/*****************************************************************************/	928	/*****************************************************************************/
413		929
414	static void *
415	aio_proc (void *thr_arg)	930	static void *aio_proc (void *thr_arg)
416	{	931	{
417	aio_req req;	932	aio_req req;
418	int type;	933	int type;
		934	worker *self = (worker *)thr_arg;
419		935
420	do	936	do
421	{	937	{
422	pthread_mutex_lock (&reqlock);	938	LOCK (reqlock);
423		939
424	for (;;)	940	for (;;)
425	{	941	{
426	req = reqs;	942	self->req = req = reqq_shift (&req_queue);
427
428	if (reqs)
429	{
430	reqs = reqs->next;
431	if (!reqs) reqe = 0;
432	}
433		943
434	if (req)	944	if (req)
435	break;	945	break;
436		946
437	pthread_cond_wait (&reqwait, &reqlock);	947	pthread_cond_wait (&reqwait, &reqlock);
438	}	948	}
439		949
440	pthread_mutex_unlock (&reqlock);	950	UNLOCK (reqlock);
441		951
442	errno = 0; /* strictly unnecessary */	952	errno = 0; /* strictly unnecessary */
		953	type = req->type; /* remember type for QUIT check */
443		954
444	type = req->type;	955	if (!(req->flags & FLAG_CANCELLED))
445
446	switch (type)	956	switch (type)
447	{	957	{
448	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	958	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
449	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	959	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
450		960
451	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	961	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
		962	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
452		963
453	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	964	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
454	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	965	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
455	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	966	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
456		967
457	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	968	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
458	case REQ_CLOSE: req->result = close (req->fd); break;	969	case REQ_CLOSE: req->result = close (req->fd); break;
459	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	970	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
460	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	971	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		972	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		973	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
461	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	974	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
462		975
463	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	976	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
464	case REQ_FSYNC: req->result = fsync (req->fd); break;	977	case REQ_FSYNC: req->result = fsync (req->fd); break;
		978	case REQ_READDIR: scandir_ (req, self); break;
465		979
		980	case REQ_BUSY:
		981	{
		982	struct timeval tv;
		983
		984	tv.tv_sec = req->fd;
		985	tv.tv_usec = req->fd2;
		986
		987	req->result = select (0, 0, 0, 0, &tv);
		988	}
		989
		990	case REQ_GROUP:
		991	case REQ_NOP:
466	case REQ_QUIT:	992	case REQ_QUIT:
467	break;	993	break;
468		994
469	default:	995	default:
470	req->result = ENOSYS;	996	req->result = ENOSYS;
471	break;	997	break;
472	}	998	}
473		999
474	req->errorno = errno;	1000	req->errorno = errno;
475		1001
476	pthread_mutex_lock (&reslock);	1002	LOCK (reslock);
477		1003
478	req->next = 0;	1004	if (!reqq_push (&res_queue, req))
479
480	if (rese)
481	{
482	rese->next = req;
483	rese = req;
484	}
485	else
486	{
487	rese = ress = req;
488
489	/* write a dummy byte to the pipe so fh becomes ready */	1005	/* write a dummy byte to the pipe so fh becomes ready */
490	write (respipe [1], &respipe, 1);	1006	write (respipe [1], &respipe, 1);
491	}
492		1007
493	pthread_mutex_unlock (&reslock);	1008	self->req = 0;
		1009	worker_clear (self);
		1010
		1011	UNLOCK (reslock);
494	}	1012	}
495	while (type != REQ_QUIT);	1013	while (type != REQ_QUIT);
496		1014
		1015	LOCK (wrklock);
		1016	worker_free (self);
		1017	UNLOCK (wrklock);
		1018
497	return 0;	1019	return 0;
		1020	}
		1021
		1022	/*****************************************************************************/
		1023
		1024	static void atfork_prepare (void)
		1025	{
		1026	LOCK (wrklock);
		1027	LOCK (reqlock);
		1028	LOCK (reslock);
		1029	#if !HAVE_PREADWRITE
		1030	LOCK (preadwritelock);
		1031	#endif
		1032	#if !HAVE_READDIR_R
		1033	LOCK (readdirlock);
		1034	#endif
		1035	}
		1036
		1037	static void atfork_parent (void)
		1038	{
		1039	#if !HAVE_READDIR_R
		1040	UNLOCK (readdirlock);
		1041	#endif
		1042	#if !HAVE_PREADWRITE
		1043	UNLOCK (preadwritelock);
		1044	#endif
		1045	UNLOCK (reslock);
		1046	UNLOCK (reqlock);
		1047	UNLOCK (wrklock);
		1048	}
		1049
		1050	static void atfork_child (void)
		1051	{
		1052	aio_req prv;
		1053
		1054	while (prv = reqq_shift (&req_queue))
		1055	req_free (prv);
		1056
		1057	while (prv = reqq_shift (&res_queue))
		1058	req_free (prv);
		1059
		1060	while (wrk_first.next != &wrk_first)
		1061	{
		1062	worker *wrk = wrk_first.next;
		1063
		1064	if (wrk->req)
		1065	req_free (wrk->req);
		1066
		1067	worker_clear (wrk);
		1068	worker_free (wrk);
		1069	}
		1070
		1071	started = 0;
		1072	nreqs = 0;
		1073
		1074	close (respipe [0]);
		1075	close (respipe [1]);
		1076	create_pipe ();
		1077
		1078	atfork_parent ();
498	}	1079	}
499		1080
500	#define dREQ \	1081	#define dREQ \
501	aio_req req; \	1082	aio_req req; \
		1083	int req_pri = next_pri; \
		1084	next_pri = DEFAULT_PRI + PRI_BIAS; \
502	\	1085	\
503	if (SvOK (callback) && !SvROK (callback)) \	1086	if (SvOK (callback) && !SvROK (callback)) \
504	croak ("clalback must be undef or of reference type"); \	1087	croak ("callback must be undef or of reference type"); \
505	\	1088	\
506	Newz (0, req, 1, aio_cb); \	1089	Newz (0, req, 1, aio_cb); \
507	if (!req) \	1090	if (!req) \
508	croak ("out of memory during aio_req allocation"); \	1091	croak ("out of memory during aio_req allocation"); \
509	\	1092	\
510	req->callback = newSVsv (callback);	1093	req->callback = newSVsv (callback); \
		1094	req->pri = req_pri
		1095
		1096	#define REQ_SEND \
		1097	req_send (req); \
		1098	\
		1099	if (GIMME_V != G_VOID) \
		1100	XPUSHs (req_sv (req, AIO_REQ_KLASS));
511		1101
512	MODULE = IO::AIO PACKAGE = IO::AIO	1102	MODULE = IO::AIO PACKAGE = IO::AIO
513		1103
514	PROTOTYPES: ENABLE	1104	PROTOTYPES: ENABLE
515		1105
516	BOOT:	1106	BOOT:
517	{	1107	{
		1108	HV *stash = gv_stashpv ("IO::AIO", 1);
		1109	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1110	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1111	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1112
518	create_pipe ();	1113	create_pipe ();
519	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1114	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
520	}	1115	}
521		1116
522	void	1117	void
523	min_parallel(nthreads)	1118	min_parallel (int nthreads)
524	int nthreads
525	PROTOTYPE: $	1119	PROTOTYPE: $
526		1120
527	void	1121	void
528	max_parallel(nthreads)	1122	max_parallel (int nthreads)
529	int nthreads
530	PROTOTYPE: $	1123	PROTOTYPE: $
531		1124
532	int	1125	int
533	max_outstanding(nreqs)	1126	max_outstanding (int maxreqs)
534	int nreqs	1127	PROTOTYPE: $
535	PROTOTYPE: $
536	CODE:	1128	CODE:
537	RETVAL = max_outstanding;	1129	RETVAL = max_outstanding;
538	max_outstanding = nreqs;	1130	max_outstanding = maxreqs;
		1131	OUTPUT:
		1132	RETVAL
539		1133
540	void	1134	void
541	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1135	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
542	SV * pathname	1136	SV * pathname
543	int flags	1137	int flags
544	int mode	1138	int mode
545	SV * callback	1139	SV * callback
546	PROTOTYPE: $$$;$	1140	PROTOTYPE: $$$;$
547	CODE:	1141	PPCODE:
548	{	1142	{
549	dREQ;	1143	dREQ;
550		1144
551	req->type = REQ_OPEN;	1145	req->type = REQ_OPEN;
552	req->data = newSVsv (pathname);	1146	req->data = newSVsv (pathname);
553	req->dataptr = SvPVbyte_nolen (req->data);	1147	req->dataptr = SvPVbyte_nolen (req->data);
554	req->fd = flags;	1148	req->fd = flags;
555	req->mode = mode;	1149	req->mode = mode;
556		1150
557	send_req (req);	1151	REQ_SEND;
558	}	1152	}
559		1153
560	void	1154	void
561	aio_close(fh,callback=&PL_sv_undef)	1155	aio_close (fh,callback=&PL_sv_undef)
562	SV * fh	1156	SV * fh
563	SV * callback	1157	SV * callback
564	PROTOTYPE: $;$	1158	PROTOTYPE: $;$
565	ALIAS:	1159	ALIAS:
566	aio_close = REQ_CLOSE	1160	aio_close = REQ_CLOSE
567	aio_fsync = REQ_FSYNC	1161	aio_fsync = REQ_FSYNC
568	aio_fdatasync = REQ_FDATASYNC	1162	aio_fdatasync = REQ_FDATASYNC
569	CODE:	1163	PPCODE:
570	{	1164	{
571	dREQ;	1165	dREQ;
572		1166
573	req->type = ix;	1167	req->type = ix;
574	req->fh = newSVsv (fh);	1168	req->fh = newSVsv (fh);
575	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1169	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
576		1170
577	send_req (req);	1171	REQ_SEND (req);
578	}	1172	}
579		1173
580	void	1174	void
581	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1175	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
582	SV * fh	1176	SV * fh
583	UV offset	1177	UV offset
584	IV length	1178	UV length
585	SV * data	1179	SV * data
586	IV dataoffset	1180	UV dataoffset
587	SV * callback	1181	SV * callback
588	ALIAS:	1182	ALIAS:
589	aio_read = REQ_READ	1183	aio_read = REQ_READ
590	aio_write = REQ_WRITE	1184	aio_write = REQ_WRITE
591	PROTOTYPE: $$$$$;$	1185	PROTOTYPE: $$$$$;$
592	CODE:	1186	PPCODE:
593	{	1187	{
594	aio_req req;	1188	aio_req req;
595	STRLEN svlen;	1189	STRLEN svlen;
596	char *svptr = SvPVbyte (data, svlen);	1190	char *svptr = SvPVbyte (data, svlen);
597		1191
…		…
629	req->offset = offset;	1223	req->offset = offset;
630	req->length = length;	1224	req->length = length;
631	req->data = SvREFCNT_inc (data);	1225	req->data = SvREFCNT_inc (data);
632	req->dataptr = (char *)svptr + dataoffset;	1226	req->dataptr = (char *)svptr + dataoffset;
633		1227
634	send_req (req);	1228	if (!SvREADONLY (data))
		1229	{
		1230	SvREADONLY_on (data);
		1231	req->data2ptr = (void *)data;
		1232	}
		1233
		1234	REQ_SEND;
635	}	1235	}
636	}	1236	}
637		1237
638	void	1238	void
		1239	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1240	SV * out_fh
		1241	SV * in_fh
		1242	UV in_offset
		1243	UV length
		1244	SV * callback
		1245	PROTOTYPE: $$$$;$
		1246	PPCODE:
		1247	{
		1248	dREQ;
		1249
		1250	req->type = REQ_SENDFILE;
		1251	req->fh = newSVsv (out_fh);
		1252	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1253	req->fh2 = newSVsv (in_fh);
		1254	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1255	req->offset = in_offset;
		1256	req->length = length;
		1257
		1258	REQ_SEND;
		1259	}
		1260
		1261	void
639	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1262	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
640	SV * fh	1263	SV * fh
641	UV offset	1264	UV offset
642	IV length	1265	IV length
643	SV * callback	1266	SV * callback
644	PROTOTYPE: $$$;$	1267	PROTOTYPE: $$$;$
645	CODE:	1268	PPCODE:
646	{	1269	{
647	dREQ;	1270	dREQ;
648		1271
649	req->type = REQ_READAHEAD;	1272	req->type = REQ_READAHEAD;
650	req->fh = newSVsv (fh);	1273	req->fh = newSVsv (fh);
651	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1274	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
652	req->offset = offset;	1275	req->offset = offset;
653	req->length = length;	1276	req->length = length;
654		1277
655	send_req (req);	1278	REQ_SEND;
656	}	1279	}
657		1280
658	void	1281	void
659	aio_stat(fh_or_path,callback=&PL_sv_undef)	1282	aio_stat (fh_or_path,callback=&PL_sv_undef)
660	SV * fh_or_path	1283	SV * fh_or_path
661	SV * callback	1284	SV * callback
662	ALIAS:	1285	ALIAS:
663	aio_stat = REQ_STAT	1286	aio_stat = REQ_STAT
664	aio_lstat = REQ_LSTAT	1287	aio_lstat = REQ_LSTAT
665	CODE:	1288	PPCODE:
666	{	1289	{
667	dREQ;	1290	dREQ;
668		1291
669	New (0, req->statdata, 1, Stat_t);	1292	New (0, req->statdata, 1, Stat_t);
670	if (!req->statdata)	1293	if (!req->statdata)
671	{	1294	{
672	free_req (req);	1295	req_free (req);
673	croak ("out of memory during aio_req->statdata allocation");	1296	croak ("out of memory during aio_req->statdata allocation");
674	}	1297	}
675		1298
676	if (SvPOK (fh_or_path))	1299	if (SvPOK (fh_or_path))
677	{	1300	{
…		…
684	req->type = REQ_FSTAT;	1307	req->type = REQ_FSTAT;
685	req->fh = newSVsv (fh_or_path);	1308	req->fh = newSVsv (fh_or_path);
686	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1309	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
687	}	1310	}
688		1311
689	send_req (req);	1312	REQ_SEND;
690	}	1313	}
691		1314
692	void	1315	void
693	aio_unlink(pathname,callback=&PL_sv_undef)	1316	aio_unlink (pathname,callback=&PL_sv_undef)
694	SV * pathname	1317	SV * pathname
695	SV * callback	1318	SV * callback
696	ALIAS:	1319	ALIAS:
697	aio_unlink = REQ_UNLINK	1320	aio_unlink = REQ_UNLINK
698	aio_rmdir = REQ_RMDIR	1321	aio_rmdir = REQ_RMDIR
		1322	aio_readdir = REQ_READDIR
699	CODE:	1323	PPCODE:
700	{	1324	{
701	dREQ;	1325	dREQ;
702		1326
703	req->type = ix;	1327	req->type = ix;
704	req->data = newSVsv (pathname);	1328	req->data = newSVsv (pathname);
705	req->dataptr = SvPVbyte_nolen (req->data);	1329	req->dataptr = SvPVbyte_nolen (req->data);
706		1330
707	send_req (req);	1331	REQ_SEND;
708	}	1332	}
709		1333
710	void	1334	void
711	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1335	aio_link (oldpath,newpath,callback=&PL_sv_undef)
712	SV * oldpath	1336	SV * oldpath
713	SV * newpath	1337	SV * newpath
714	SV * callback	1338	SV * callback
		1339	ALIAS:
		1340	aio_link = REQ_LINK
		1341	aio_symlink = REQ_SYMLINK
		1342	aio_rename = REQ_RENAME
715	CODE:	1343	PPCODE:
716	{	1344	{
717	dREQ;	1345	dREQ;
718		1346
719	req->type = REQ_SYMLINK;	1347	req->type = ix;
720	req->fh = newSVsv (oldpath);	1348	req->fh = newSVsv (oldpath);
721	req->data2ptr = SvPVbyte_nolen (req->fh);	1349	req->data2ptr = SvPVbyte_nolen (req->fh);
722	req->data = newSVsv (newpath);	1350	req->data = newSVsv (newpath);
723	req->dataptr = SvPVbyte_nolen (req->data);	1351	req->dataptr = SvPVbyte_nolen (req->data);
724		1352
725	send_req (req);	1353	REQ_SEND;
726	}	1354	}
727		1355
728	void	1356	void
		1357	aio_busy (delay,callback=&PL_sv_undef)
		1358	double delay
		1359	SV * callback
		1360	PPCODE:
		1361	{
		1362	dREQ;
		1363
		1364	req->type = REQ_BUSY;
		1365	req->fd = delay < 0. ? 0 : delay;
		1366	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1367
		1368	REQ_SEND;
		1369	}
		1370
		1371	void
		1372	aio_group (callback=&PL_sv_undef)
		1373	SV * callback
		1374	PROTOTYPE: ;$
		1375	PPCODE:
		1376	{
		1377	dREQ;
		1378
		1379	req->type = REQ_GROUP;
		1380	req_send (req);
		1381
		1382	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1383	}
		1384
		1385	void
		1386	aio_nop (callback=&PL_sv_undef)
		1387	SV * callback
		1388	PPCODE:
		1389	{
		1390	dREQ;
		1391
		1392	req->type = REQ_NOP;
		1393
		1394	REQ_SEND;
		1395	}
		1396
		1397	void
		1398	aioreq_pri (int pri = DEFAULT_PRI)
		1399	CODE:
		1400	if (pri < PRI_MIN) pri = PRI_MIN;
		1401	if (pri > PRI_MAX) pri = PRI_MAX;
		1402	next_pri = pri + PRI_BIAS;
		1403
		1404	void
		1405	aioreq_nice (int nice = 0)
		1406	CODE:
		1407	nice = next_pri - nice;
		1408	if (nice < PRI_MIN) nice = PRI_MIN;
		1409	if (nice > PRI_MAX) nice = PRI_MAX;
		1410	next_pri = nice + PRI_BIAS;
		1411
		1412	void
729	flush()	1413	flush ()
730	PROTOTYPE:	1414	PROTOTYPE:
731	CODE:	1415	CODE:
732	while (nreqs)	1416	while (nreqs)
733	{	1417	{
734	poll_wait ();	1418	poll_wait ();
735	poll_cb ();	1419	poll_cb (0);
736	}	1420	}
737		1421
738	void	1422	void
739	poll()	1423	poll()
740	PROTOTYPE:	1424	PROTOTYPE:
741	CODE:	1425	CODE:
742	if (nreqs)	1426	if (nreqs)
743	{	1427	{
744	poll_wait ();	1428	poll_wait ();
745	poll_cb ();	1429	poll_cb (0);
746	}	1430	}
747		1431
748	int	1432	int
749	poll_fileno()	1433	poll_fileno()
750	PROTOTYPE:	1434	PROTOTYPE:
…		…
755		1439
756	int	1440	int
757	poll_cb(...)	1441	poll_cb(...)
758	PROTOTYPE:	1442	PROTOTYPE:
759	CODE:	1443	CODE:
760	RETVAL = poll_cb ();	1444	RETVAL = poll_cb (0);
		1445	OUTPUT:
		1446	RETVAL
		1447
		1448	int
		1449	poll_some(int max = 0)
		1450	PROTOTYPE: $
		1451	CODE:
		1452	RETVAL = poll_cb (max);
761	OUTPUT:	1453	OUTPUT:
762	RETVAL	1454	RETVAL
763		1455
764	void	1456	void
765	poll_wait()	1457	poll_wait()
…		…
774	CODE:	1466	CODE:
775	RETVAL = nreqs;	1467	RETVAL = nreqs;
776	OUTPUT:	1468	OUTPUT:
777	RETVAL	1469	RETVAL
778		1470
		1471	PROTOTYPES: DISABLE
		1472
		1473	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1474
		1475	void
		1476	cancel (aio_req_ornot req)
		1477	CODE:
		1478	req_cancel (req);
		1479
		1480	void
		1481	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1482	CODE:
		1483	SvREFCNT_dec (req->callback);
		1484	req->callback = newSVsv (callback);
		1485
		1486	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1487
		1488	void
		1489	add (aio_req grp, ...)
		1490	PPCODE:
		1491	{
		1492	int i;
		1493	aio_req req;
		1494
		1495	if (grp->fd == 2)
		1496	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1497
		1498	for (i = 1; i < items; ++i )
		1499	{
		1500	if (GIMME_V != G_VOID)
		1501	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1502
		1503	req = SvAIO_REQ (ST (i));
		1504
		1505	if (req)
		1506	{
		1507	++grp->length;
		1508	req->grp = grp;
		1509
		1510	req->grp_prev = 0;
		1511	req->grp_next = grp->grp_first;
		1512
		1513	if (grp->grp_first)
		1514	grp->grp_first->grp_prev = req;
		1515
		1516	grp->grp_first = req;
		1517	}
		1518	}
		1519	}
		1520
		1521	void
		1522	cancel_subs (aio_req_ornot req)
		1523	CODE:
		1524	req_cancel_subs (req);
		1525
		1526	void
		1527	result (aio_req grp, ...)
		1528	CODE:
		1529	{
		1530	int i;
		1531	AV *av = newAV ();
		1532
		1533	for (i = 1; i < items; ++i )
		1534	av_push (av, newSVsv (ST (i)));
		1535
		1536	SvREFCNT_dec (grp->data);
		1537	grp->data = (SV *)av;
		1538	}
		1539
		1540	void
		1541	limit (aio_req grp, int limit)
		1542	CODE:
		1543	grp->fd2 = limit;
		1544	aio_grp_feed (grp);
		1545
		1546	void
		1547	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1548	CODE:
		1549	{
		1550	SvREFCNT_dec (grp->fh2);
		1551	grp->fh2 = newSVsv (callback);
		1552
		1553	if (grp->fd2 <= 0)
		1554	grp->fd2 = 2;
		1555
		1556	aio_grp_feed (grp);
		1557	}
		1558

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