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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.41 by root, Sat Jun 24 19:14:04 2006 UTC vs.
Revision 1.75 by root, Thu Oct 26 06:44:48 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux
		5	# define _GNU_SOURCE
		6	#endif
		7
1	#define _REENTRANT 1	8	#define _REENTRANT 1
		9
2	#include <errno.h>	10	#include <errno.h>
3		11
4	#include "EXTERN.h"	12	#include "EXTERN.h"
5	#include "perl.h"	13	#include "perl.h"
6	#include "XSUB.h"	14	#include "XSUB.h"
…		…
9		17
10	#include <pthread.h>	18	#include <pthread.h>
11		19
12	#include <stddef.h>	20	#include <stddef.h>
13	#include <errno.h>	21	#include <errno.h>
		22	#include <sys/time.h>
		23	#include <sys/select.h>
14	#include <sys/types.h>	24	#include <sys/types.h>
15	#include <sys/stat.h>	25	#include <sys/stat.h>
16	#include <limits.h>	26	#include <limits.h>
17	#include <unistd.h>	27	#include <unistd.h>
18	#include <fcntl.h>	28	#include <fcntl.h>
…		…
37	/* used for struct dirent, AIX doesn't provide it */	47	/* used for struct dirent, AIX doesn't provide it */
38	#ifndef NAME_MAX	48	#ifndef NAME_MAX
39	# define NAME_MAX 4096	49	# define NAME_MAX 4096
40	#endif	50	#endif
41		51
		52	#ifndef PTHREAD_STACK_MIN
		53	/* care for broken platforms, e.g. windows */
		54	# define PTHREAD_STACK_MIN 16384
		55	#endif
		56
42	#if __ia64	57	#if __ia64
43	# define STACKSIZE 65536	58	# define STACKSIZE 65536
		59	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		60	# define STACKSIZE PTHREAD_STACK_MIN
44	#else	61	#else
45	# define STACKSIZE 8192	62	# define STACKSIZE 16384
46	#endif	63	#endif
		64
		65	/* buffer size for various temporary buffers */
		66	#define AIO_BUFSIZE 65536
		67
		68	#define dBUF \
		69	char *aio_buf; \
		70	LOCK (wrklock); \
		71	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		72	UNLOCK (wrklock); \
		73	if (!aio_buf) \
		74	return -1;
47		75
48	enum {	76	enum {
49	REQ_QUIT,	77	REQ_QUIT,
50	REQ_OPEN, REQ_CLOSE,	78	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	79	REQ_READ, REQ_WRITE, REQ_READAHEAD,
…		…
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	81	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,	82	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	83	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,	84	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,	85	REQ_LINK, REQ_SYMLINK,
		86	REQ_GROUP, REQ_NOP,
		87	REQ_BUSY,
58	};	88	};
59		89
		90	#define AIO_REQ_KLASS "IO::AIO::REQ"
		91	#define AIO_GRP_KLASS "IO::AIO::GRP"
		92
60	typedef struct aio_cb {	93	typedef struct aio_cb
		94	{
61	struct aio_cb *volatile next;	95	struct aio_cb *volatile next;
62		96
63	int type;	97	SV *data, *callback;
64		98	SV *fh, *fh2;
65	/* should receive a cleanup, with unions */	99	void *dataptr, *data2ptr;
66	int fd, fd2;	100	Stat_t *statdata;
67	off_t offset;	101	off_t offset;
68	size_t length;	102	size_t length;
69	ssize_t result;	103	ssize_t result;
		104
		105	STRLEN dataoffset;
		106	int type;
		107	int fd, fd2;
		108	int errorno;
70	mode_t mode; /* open */	109	mode_t mode; /* open */
71	int errorno;
72	SV *data, *callback;
73	SV *fh, *fh2;
74	void *dataptr, *data2ptr;
75	STRLEN dataoffset;
76		110
77	Stat_t *statdata;	111	unsigned char flags;
		112	unsigned char pri;
		113
		114	SV *self; /* the perl counterpart of this request, if any */
		115	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
78	} aio_cb;	116	} aio_cb;
79		117
		118	enum {
		119	FLAG_CANCELLED = 0x01,
		120	};
		121
80	typedef aio_cb *aio_req;	122	typedef aio_cb *aio_req;
		123	typedef aio_cb *aio_req_ornot;
		124
		125	enum {
		126	PRI_MIN = -4,
		127	PRI_MAX = 4,
		128
		129	DEFAULT_PRI = 0,
		130	PRI_BIAS = -PRI_MIN,
		131	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		132	};
		133
		134	static int next_pri = DEFAULT_PRI + PRI_BIAS;
81		135
82	static int started, wanted;	136	static int started, wanted;
83	static volatile int nreqs;	137	static volatile int nreqs;
84	static int max_outstanding = 1<<30;
85	static int respipe [2];	138	static int respipe [2];
86		139
		140	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		141	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		142	#else
		143	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		144	#endif
		145
		146	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		147	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		148
		149	/* worker threasd management */
		150	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		151
		152	typedef struct worker {
		153	/* locked by wrklock */
		154	struct worker *prev, *next;
		155
		156	pthread_t tid;
		157
		158	/* locked by reslock, reqlock or wrklock */
		159	aio_req req; /* currently processed request */
		160	void *dbuf;
		161	DIR *dirp;
		162	} worker;
		163
		164	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		165
		166	static void worker_clear (worker *wrk)
		167	{
		168	if (wrk->dirp)
		169	{
		170	closedir (wrk->dirp);
		171	wrk->dirp = 0;
		172	}
		173
		174	if (wrk->dbuf)
		175	{
		176	free (wrk->dbuf);
		177	wrk->dbuf = 0;
		178	}
		179	}
		180
		181	static void worker_free (worker *wrk)
		182	{
		183	wrk->next->prev = wrk->prev;
		184	wrk->prev->next = wrk->next;
		185
		186	free (wrk);
		187	}
		188
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	189	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	190	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	191	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90		192
91	static volatile aio_req reqs, reqe; /* queue start, queue end */	193	/*
92	static volatile aio_req ress, rese; /* queue start, queue end */	194	* a somewhat faster data structure might be nice, but
		195	* with 8 priorities this actually needs <20 insns
		196	* per shift, the most expensive operation.
		197	*/
		198	typedef struct {
		199	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		200	int size;
		201	} reqq;
93		202
		203	static reqq req_queue;
		204	static reqq res_queue;
		205
		206	int reqq_push (reqq *q, aio_req req)
		207	{
		208	int pri = req->pri;
		209	req->next = 0;
		210
		211	if (q->qe[pri])
		212	{
		213	q->qe[pri]->next = req;
		214	q->qe[pri] = req;
		215	}
		216	else
		217	q->qe[pri] = q->qs[pri] = req;
		218
		219	return q->size++;
		220	}
		221
		222	aio_req reqq_shift (reqq *q)
		223	{
		224	int pri;
		225
		226	if (!q->size)
		227	return 0;
		228
		229	--q->size;
		230
		231	for (pri = NUM_PRI; pri--; )
		232	{
		233	aio_req req = q->qs[pri];
		234
		235	if (req)
		236	{
		237	if (!(q->qs[pri] = req->next))
		238	q->qe[pri] = 0;
		239
		240	return req;
		241	}
		242	}
		243
		244	abort ();
		245	}
		246
		247	static int poll_cb ();
		248	static void req_invoke (aio_req req);
94	static void free_req (aio_req req)	249	static void req_free (aio_req req);
95	{	250	static void req_cancel (aio_req req);
96	if (req->data)
97	SvREFCNT_dec (req->data);
98		251
		252	/* must be called at most once */
		253	static SV *req_sv (aio_req req, const char *klass)
		254	{
99	if (req->fh)	255	if (!req->self)
100	SvREFCNT_dec (req->fh);	256	{
		257	req->self = (SV *)newHV ();
		258	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		259	}
101		260
102	if (req->fh2)	261	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		262	}
		263
		264	static aio_req SvAIO_REQ (SV *sv)
		265	{
		266	MAGIC *mg;
		267
		268	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		269	croak ("object of class " AIO_REQ_KLASS " expected");
		270
		271	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		272
		273	return mg ? (aio_req)mg->mg_ptr : 0;
		274	}
		275
		276	static void aio_grp_feed (aio_req grp)
		277	{
		278	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		279	{
		280	int old_len = grp->length;
		281
		282	if (grp->fh2 && SvOK (grp->fh2))
		283	{
		284	dSP;
		285
		286	ENTER;
		287	SAVETMPS;
		288	PUSHMARK (SP);
		289	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		290	PUTBACK;
		291	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		292	SPAGAIN;
		293	FREETMPS;
		294	LEAVE;
		295	}
		296
		297	/* stop if no progress has been made */
		298	if (old_len == grp->length)
		299	{
103	SvREFCNT_dec (req->fh2);	300	SvREFCNT_dec (grp->fh2);
104		301	grp->fh2 = 0;
105	if (req->statdata)	302	break;
106	Safefree (req->statdata);	303	}
107
108	if (req->callback)
109	SvREFCNT_dec (req->callback);
110
111	if (req->type == REQ_READDIR && req->result >= 0)
112	free (req->data2ptr);
113
114	Safefree (req);
115	}
116
117	static void
118	poll_wait ()
119	{
120	if (nreqs && !ress)
121	{	304	}
		305	}
		306
		307	static void aio_grp_dec (aio_req grp)
		308	{
		309	--grp->length;
		310
		311	/* call feeder, if applicable */
		312	aio_grp_feed (grp);
		313
		314	/* finish, if done */
		315	if (!grp->length && grp->fd)
		316	{
		317	req_invoke (grp);
		318	req_free (grp);
		319	}
		320	}
		321
		322	static void poll_wait ()
		323	{
122	fd_set rfd;	324	fd_set rfd;
		325
		326	while (nreqs)
		327	{
		328	int size;
		329	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		330	LOCK (reslock);
		331	#endif
		332	size = res_queue.size;
		333	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
		334	UNLOCK (reslock);
		335	#endif
		336
		337	if (size)
		338	return;
		339
123	FD_ZERO(&rfd);	340	FD_ZERO(&rfd);
124	FD_SET(respipe [0], &rfd);	341	FD_SET(respipe [0], &rfd);
125		342
126	select (respipe [0] + 1, &rfd, 0, 0, 0);	343	select (respipe [0] + 1, &rfd, 0, 0, 0);
127	}	344	}
128	}	345	}
129		346
130	static int	347	static void req_invoke (aio_req req)
131	poll_cb ()	348	{
		349	dSP;
		350
		351	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		352	{
		353	errno = req->errorno;
		354
		355	ENTER;
		356	SAVETMPS;
		357	PUSHMARK (SP);
		358	EXTEND (SP, 1);
		359
		360	switch (req->type)
		361	{
		362	case REQ_READDIR:
		363	{
		364	SV *rv = &PL_sv_undef;
		365
		366	if (req->result >= 0)
		367	{
		368	int i;
		369	char *buf = req->data2ptr;
		370	AV *av = newAV ();
		371
		372	av_extend (av, req->result - 1);
		373
		374	for (i = 0; i < req->result; ++i)
		375	{
		376	SV *sv = newSVpv (buf, 0);
		377
		378	av_store (av, i, sv);
		379	buf += SvCUR (sv) + 1;
		380	}
		381
		382	rv = sv_2mortal (newRV_noinc ((SV *)av));
		383	}
		384
		385	PUSHs (rv);
		386	}
		387	break;
		388
		389	case REQ_OPEN:
		390	{
		391	/* convert fd to fh */
		392	SV *fh;
		393
		394	PUSHs (sv_2mortal (newSViv (req->result)));
		395	PUTBACK;
		396	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		397	SPAGAIN;
		398
		399	fh = SvREFCNT_inc (POPs);
		400
		401	PUSHMARK (SP);
		402	XPUSHs (sv_2mortal (fh));
		403	}
		404	break;
		405
		406	case REQ_GROUP:
		407	req->fd = 2; /* mark group as finished */
		408
		409	if (req->data)
		410	{
		411	int i;
		412	AV *av = (AV *)req->data;
		413
		414	EXTEND (SP, AvFILL (av) + 1);
		415	for (i = 0; i <= AvFILL (av); ++i)
		416	PUSHs (*av_fetch (av, i, 0));
		417	}
		418	break;
		419
		420	case REQ_NOP:
		421	case REQ_BUSY:
		422	break;
		423
		424	default:
		425	PUSHs (sv_2mortal (newSViv (req->result)));
		426	break;
		427	}
		428
		429
		430	PUTBACK;
		431	call_sv (req->callback, G_VOID | G_EVAL);
		432	SPAGAIN;
		433
		434	FREETMPS;
		435	LEAVE;
		436	}
		437
		438	if (req->grp)
		439	{
		440	aio_req grp = req->grp;
		441
		442	/* unlink request */
		443	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		444	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		445
		446	if (grp->grp_first == req)
		447	grp->grp_first = req->grp_next;
		448
		449	aio_grp_dec (grp);
		450	}
		451
		452	if (SvTRUE (ERRSV))
		453	{
		454	req_free (req);
		455	croak (0);
		456	}
		457	}
		458
		459	static void req_free (aio_req req)
		460	{
		461	if (req->self)
		462	{
		463	sv_unmagic (req->self, PERL_MAGIC_ext);
		464	SvREFCNT_dec (req->self);
		465	}
		466
		467	SvREFCNT_dec (req->data);
		468	SvREFCNT_dec (req->fh);
		469	SvREFCNT_dec (req->fh2);
		470	SvREFCNT_dec (req->callback);
		471	Safefree (req->statdata);
		472
		473	if (req->type == REQ_READDIR)
		474	free (req->data2ptr);
		475
		476	Safefree (req);
		477	}
		478
		479	static void req_cancel_subs (aio_req grp)
		480	{
		481	aio_req sub;
		482
		483	if (grp->type != REQ_GROUP)
		484	return;
		485
		486	SvREFCNT_dec (grp->fh2);
		487	grp->fh2 = 0;
		488
		489	for (sub = grp->grp_first; sub; sub = sub->grp_next)
		490	req_cancel (sub);
		491	}
		492
		493	static void req_cancel (aio_req req)
		494	{
		495	req->flags |= FLAG_CANCELLED;
		496
		497	req_cancel_subs (req);
		498	}
		499
		500	static int poll_cb ()
132	{	501	{
133	dSP;	502	dSP;
134	int count = 0;	503	int count = 0;
135	int do_croak = 0;	504	int do_croak = 0;
136	aio_req req;	505	aio_req req;
137		506
138	for (;;)	507	for (;;)
139	{	508	{
140	pthread_mutex_lock (&reslock);	509	LOCK (reslock);
141	req = ress;	510	req = reqq_shift (&res_queue);
142		511
143	if (req)	512	if (req)
144	{	513	{
145	ress = req->next;
146
147	if (!ress)	514	if (!res_queue.size)
148	{	515	{
149	/* read any signals sent by the worker threads */	516	/* read any signals sent by the worker threads */
150	char buf [32];	517	char buf [32];
151	while (read (respipe [0], buf, 32) == 32)	518	while (read (respipe [0], buf, 32) == 32)
152	;	519	;
153
154	rese = 0;
155	}	520	}
156	}	521	}
157		522
158	pthread_mutex_unlock (&reslock);	523	UNLOCK (reslock);
159		524
160	if (!req)	525	if (!req)
161	break;	526	break;
162		527
163	nreqs--;	528	--nreqs;
164		529
165	if (req->type == REQ_QUIT)	530	if (req->type == REQ_QUIT)
166	started--;	531	started--;
		532	else if (req->type == REQ_GROUP && req->length)
		533	{
		534	req->fd = 1; /* mark request as delayed */
		535	continue;
		536	}
167	else	537	else
168	{	538	{
169	int errorno = errno;
170	errno = req->errorno;
171
172	if (req->type == REQ_READ)	539	if (req->type == REQ_READ)
173	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	540	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
174		541
175	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	542	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176	SvREADONLY_off (req->data);	543	SvREADONLY_off (req->data);
…		…
180	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	547	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
181	PL_laststatval = req->result;	548	PL_laststatval = req->result;
182	PL_statcache = *(req->statdata);	549	PL_statcache = *(req->statdata);
183	}	550	}
184		551
185	ENTER;	552	req_invoke (req);
186	PUSHMARK (SP);
187		553
188	if (req->type == REQ_READDIR)
189	{
190	SV *rv = &PL_sv_undef;
191
192	if (req->result >= 0)
193	{
194	char *buf = req->data2ptr;
195	AV *av = newAV ();
196
197	while (req->result)
198	{
199	SV *sv = newSVpv (buf, 0);
200
201	av_push (av, sv);
202	buf += SvCUR (sv) + 1;
203	req->result--;
204	}
205
206	rv = sv_2mortal (newRV_noinc ((SV *)av));
207	}
208
209	XPUSHs (rv);
210	}
211	else
212	{
213	XPUSHs (sv_2mortal (newSViv (req->result)));
214
215	if (req->type == REQ_OPEN)
216	{
217	/* convert fd to fh */
218	SV *fh;
219
220	PUTBACK;
221	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
222	SPAGAIN;
223
224	fh = SvREFCNT_inc (POPs);
225
226	PUSHMARK (SP);
227	XPUSHs (sv_2mortal (fh));
228	}
229	}
230
231	if (SvOK (req->callback))
232	{
233	PUTBACK;
234	call_sv (req->callback, G_VOID | G_EVAL);
235	SPAGAIN;
236
237	if (SvTRUE (ERRSV))
238	{
239	free_req (req);
240	croak (0);
241	}
242	}
243
244	LEAVE;
245
246	errno = errorno;
247	count++;	554	count++;
248	}	555	}
249		556
250	free_req (req);	557	req_free (req);
251	}	558	}
252		559
253	return count;	560	return count;
254	}	561	}
255		562
256	static void *aio_proc(void *arg);	563	static void *aio_proc(void *arg);
257		564
258	static void
259	start_thread (void)	565	static void start_thread (void)
260	{	566	{
261	sigset_t fullsigset, oldsigset;	567	sigset_t fullsigset, oldsigset;
262	pthread_t tid;
263	pthread_attr_t attr;	568	pthread_attr_t attr;
		569
		570	worker *wrk = calloc (1, sizeof (worker));
		571
		572	if (!wrk)
		573	croak ("unable to allocate worker thread data");
264		574
265	pthread_attr_init (&attr);	575	pthread_attr_init (&attr);
266	pthread_attr_setstacksize (&attr, STACKSIZE);	576	pthread_attr_setstacksize (&attr, STACKSIZE);
267	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	577	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
268		578
269	sigfillset (&fullsigset);	579	sigfillset (&fullsigset);
		580
		581	LOCK (wrklock);
270	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	582	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
271		583
272	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)	584	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
		585	{
		586	wrk->prev = &wrk_first;
		587	wrk->next = wrk_first.next;
		588	wrk_first.next->prev = wrk;
		589	wrk_first.next = wrk;
273	started++;	590	started++;
		591	}
		592	else
		593	free (wrk);
274		594
275	sigprocmask (SIG_SETMASK, &oldsigset, 0);	595	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		596	UNLOCK (wrklock);
276	}	597	}
277		598
278	static void	599	static void req_send (aio_req req)
279	send_req (aio_req req)
280	{	600	{
281	while (started < wanted && nreqs >= started)	601	while (started < wanted && nreqs >= started)
282	start_thread ();	602	start_thread ();
283		603
284	nreqs++;	604	++nreqs;
285		605
286	pthread_mutex_lock (&reqlock);	606	LOCK (reqlock);
287		607	reqq_push (&req_queue, req);
288	req->next = 0;
289
290	if (reqe)
291	{
292	reqe->next = req;
293	reqe = req;
294	}
295	else
296	reqe = reqs = req;
297
298	pthread_cond_signal (&reqwait);	608	pthread_cond_signal (&reqwait);
299	pthread_mutex_unlock (&reqlock);	609	UNLOCK (reqlock);
300
301	if (nreqs > max_outstanding)
302	for (;;)
303	{
304	poll_cb ();
305
306	if (nreqs <= max_outstanding)
307	break;
308
309	poll_wait ();
310	}
311	}	610	}
312		611
313	static void	612	static void end_thread (void)
314	end_thread (void)
315	{	613	{
316	aio_req req;	614	aio_req req;
		615
317	Newz (0, req, 1, aio_cb);	616	Newz (0, req, 1, aio_cb);
		617
318	req->type = REQ_QUIT;	618	req->type = REQ_QUIT;
		619	req->pri = PRI_MAX + PRI_BIAS;
319		620
320	send_req (req);	621	req_send (req);
321	}	622	}
322		623
323	static void min_parallel (int nthreads)	624	static void min_parallel (int nthreads)
324	{	625	{
325	if (wanted < nthreads)	626	if (wanted < nthreads)
…		…
370	* normal read/write by using a mutex. slows down execution a lot,	671	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.	672	* but that's your problem, not mine.
372	*/	673	*/
373	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	674	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374		675
375	static ssize_t	676	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{	677	{
378	ssize_t res;	678	ssize_t res;
379	off_t ooffset;	679	off_t ooffset;
380		680
381	pthread_mutex_lock (&preadwritelock);	681	LOCK (preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);	682	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);	683	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);	684	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);	685	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&preadwritelock);	686	UNLOCK (preadwritelock);
387		687
388	return res;	688	return res;
389	}	689	}
390		690
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)	691	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
393	{	692	{
394	ssize_t res;	693	ssize_t res;
395	off_t ooffset;	694	off_t ooffset;
396		695
397	pthread_mutex_lock (&preadwritelock);	696	LOCK (preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);	697	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);	698	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);	699	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);	700	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&preadwritelock);	701	UNLOCK (preadwritelock);
403		702
404	return res;	703	return res;
405	}	704	}
406	#endif	705	#endif
407		706
408	#if !HAVE_FDATASYNC	707	#if !HAVE_FDATASYNC
409	# define fdatasync fsync	708	# define fdatasync fsync
410	#endif	709	#endif
411		710
412	#if !HAVE_READAHEAD	711	#if !HAVE_READAHEAD
413	# define readahead aio_readahead	712	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
414		713
415	static ssize_t	714	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
416	readahead (int fd, off_t offset, size_t count)
417	{	715	{
418	char readahead_buf[4096];	716	dBUF;
419		717
420	while (count > 0)	718	while (count > 0)
421	{	719	{
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	720	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
423		721
424	pread (fd, readahead_buf, len, offset);	722	pread (fd, aio_buf, len, offset);
425	offset += len;	723	offset += len;
426	count -= len;	724	count -= len;
427	}	725	}
428		726
429	errno = 0;	727	errno = 0;
430	}	728	}
		729
431	#endif	730	#endif
432		731
433	#if !HAVE_READDIR_R	732	#if !HAVE_READDIR_R
434	# define readdir_r aio_readdir_r	733	# define readdir_r aio_readdir_r
435		734
436	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	735	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
437		736
438	static int
439	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	737	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
440	{	738	{
441	struct dirent *e;	739	struct dirent *e;
442	int errorno;	740	int errorno;
443		741
444	pthread_mutex_lock (&readdirlock);	742	LOCK (readdirlock);
445		743
446	e = readdir (dirp);	744	e = readdir (dirp);
447	errorno = errno;	745	errorno = errno;
448		746
449	if (e)	747	if (e)
…		…
452	strcpy (ent->d_name, e->d_name);	750	strcpy (ent->d_name, e->d_name);
453	}	751	}
454	else	752	else
455	*res = 0;	753	*res = 0;
456		754
457	pthread_mutex_unlock (&readdirlock);	755	UNLOCK (readdirlock);
458		756
459	errno = errorno;	757	errno = errorno;
460	return e ? 0 : -1;	758	return e ? 0 : -1;
461	}	759	}
462	#endif	760	#endif
463		761
464	/* sendfile always needs emulation */	762	/* sendfile always needs emulation */
465	static ssize_t
466	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	763	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
467	{	764	{
468	ssize_t res;	765	ssize_t res;
469		766
470	if (!count)	767	if (!count)
471	return 0;	768	return 0;
…		…
520	#endif	817	#endif
521	)	818	)
522	)	819	)
523	{	820	{
524	/* emulate sendfile. this is a major pain in the ass */	821	/* emulate sendfile. this is a major pain in the ass */
525	char buf[4096];	822	dBUF;
		823
526	res = 0;	824	res = 0;
527		825
528	while (count)	826	while (count)
529	{	827	{
530	ssize_t cnt;	828	ssize_t cnt;
531		829
532	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	830	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
533		831
534	if (cnt <= 0)	832	if (cnt <= 0)
535	{	833	{
536	if (cnt && !res) res = -1;	834	if (cnt && !res) res = -1;
537	break;	835	break;
538	}	836	}
539		837
540	cnt = write (ofd, buf, cnt);	838	cnt = write (ofd, aio_buf, cnt);
541		839
542	if (cnt <= 0)	840	if (cnt <= 0)
543	{	841	{
544	if (cnt && !res) res = -1;	842	if (cnt && !res) res = -1;
545	break;	843	break;
…		…
553		851
554	return res;	852	return res;
555	}	853	}
556		854
557	/* read a full directory */	855	/* read a full directory */
558	static int	856	static void scandir_ (aio_req req, worker *self)
559	scandir_ (const char *path, void **namesp)
560	{	857	{
561	DIR *dirp = opendir (path);	858	DIR *dirp;
562	union	859	union
563	{	860	{
564	struct dirent d;	861	struct dirent d;
565	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	862	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
566	} u;	863	} *u;
567	struct dirent *entp;	864	struct dirent *entp;
568	char *name, *names;	865	char *name, *names;
569	int memlen = 4096;	866	int memlen = 4096;
570	int memofs = 0;	867	int memofs = 0;
571	int res = 0;	868	int res = 0;
572	int errorno;	869	int errorno;
573		870
574	if (!dirp)	871	LOCK (wrklock);
575	return -1;	872	self->dirp = dirp = opendir (req->dataptr);
		873	self->dbuf = u = malloc (sizeof (*u));
		874	UNLOCK (wrklock);
576		875
577	names = malloc (memlen);	876	req->data2ptr = names = malloc (memlen);
578		877
		878	if (dirp && u && names)
579	for (;;)	879	for (;;)
580	{	880	{
		881	errno = 0;
581	errno = 0, readdir_r (dirp, &u.d, &entp);	882	readdir_r (dirp, &u->d, &entp);
582		883
583	if (!entp)	884	if (!entp)
584	break;	885	break;
585		886
586	name = entp->d_name;	887	name = entp->d_name;
587		888
588	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	889	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
589	{	890	{
590	int len = strlen (name) + 1;	891	int len = strlen (name) + 1;
591		892
592	res++;	893	res++;
593		894
594	while (memofs + len > memlen)	895	while (memofs + len > memlen)
595	{	896	{
596	memlen *= 2;	897	memlen *= 2;
		898	LOCK (wrklock);
597	names = realloc (names, memlen);	899	req->data2ptr = names = realloc (names, memlen);
		900	UNLOCK (wrklock);
		901
598	if (!names)	902	if (!names)
599	break;	903	break;
600	}	904	}
601		905
602	memcpy (names + memofs, name, len);	906	memcpy (names + memofs, name, len);
603	memofs += len;	907	memofs += len;
604	}	908	}
605	}	909	}
606		910
607	errorno = errno;
608	closedir (dirp);
609
610	if (errorno)	911	if (errno)
611	{
612	free (names);
613	errno = errorno;
614	res = -1;	912	res = -1;
615	}	913
616		914	req->result = res;
617	*namesp = (void *)names;
618	return res;
619	}	915	}
620		916
621	/*****************************************************************************/	917	/*****************************************************************************/
622		918
623	static void *
624	aio_proc (void *thr_arg)	919	static void *aio_proc (void *thr_arg)
625	{	920	{
626	aio_req req;	921	aio_req req;
627	int type;	922	int type;
		923	worker *self = (worker *)thr_arg;
628		924
629	do	925	do
630	{	926	{
631	pthread_mutex_lock (&reqlock);	927	LOCK (reqlock);
632		928
633	for (;;)	929	for (;;)
634	{	930	{
635	req = reqs;	931	self->req = req = reqq_shift (&req_queue);
636
637	if (reqs)
638	{
639	reqs = reqs->next;
640	if (!reqs) reqe = 0;
641	}
642		932
643	if (req)	933	if (req)
644	break;	934	break;
645		935
646	pthread_cond_wait (&reqwait, &reqlock);	936	pthread_cond_wait (&reqwait, &reqlock);
647	}	937	}
648		938
649	pthread_mutex_unlock (&reqlock);	939	UNLOCK (reqlock);
650		940
651	errno = 0; /* strictly unnecessary */	941	errno = 0; /* strictly unnecessary */
		942	type = req->type; /* remember type for QUIT check */
652		943
653	type = req->type;	944	if (!(req->flags & FLAG_CANCELLED))
654
655	switch (type)	945	switch (type)
656	{	946	{
657	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	947	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	948	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
659		949
660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	950	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
661	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	951	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
662		952
663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	953	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
664	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	954	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
665	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	955	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
666		956
667	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	957	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
668	case REQ_CLOSE: req->result = close (req->fd); break;	958	case REQ_CLOSE: req->result = close (req->fd); break;
669	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	959	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
670	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	960	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
671	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;	961	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
672	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;	962	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
673	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	963	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
674		964
675	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	965	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
676	case REQ_FSYNC: req->result = fsync (req->fd); break;	966	case REQ_FSYNC: req->result = fsync (req->fd); break;
677	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	967	case REQ_READDIR: scandir_ (req, self); break;
678		968
		969	case REQ_BUSY:
		970	{
		971	struct timeval tv;
		972
		973	tv.tv_sec = req->fd;
		974	tv.tv_usec = req->fd2;
		975
		976	req->result = select (0, 0, 0, 0, &tv);
		977	}
		978
		979	case REQ_GROUP:
		980	case REQ_NOP:
679	case REQ_QUIT:	981	case REQ_QUIT:
680	break;	982	break;
681		983
682	default:	984	default:
683	req->result = ENOSYS;	985	req->result = ENOSYS;
684	break;	986	break;
685	}	987	}
686		988
687	req->errorno = errno;	989	req->errorno = errno;
688		990
689	pthread_mutex_lock (&reslock);	991	LOCK (reslock);
690		992
691	req->next = 0;	993	if (!reqq_push (&res_queue, req))
692
693	if (rese)
694	{
695	rese->next = req;
696	rese = req;
697	}
698	else
699	{
700	rese = ress = req;
701
702	/* write a dummy byte to the pipe so fh becomes ready */	994	/* write a dummy byte to the pipe so fh becomes ready */
703	write (respipe [1], &respipe, 1);	995	write (respipe [1], &respipe, 1);
704	}
705		996
706	pthread_mutex_unlock (&reslock);	997	self->req = 0;
		998	worker_clear (self);
		999
		1000	UNLOCK (reslock);
707	}	1001	}
708	while (type != REQ_QUIT);	1002	while (type != REQ_QUIT);
709		1003
		1004	LOCK (wrklock);
		1005	worker_free (self);
		1006	UNLOCK (wrklock);
		1007
710	return 0;	1008	return 0;
711	}	1009	}
712		1010
713	/*****************************************************************************/	1011	/*****************************************************************************/
714		1012
715	static void atfork_prepare (void)	1013	static void atfork_prepare (void)
716	{	1014	{
717	pthread_mutex_lock (&reqlock);	1015	LOCK (wrklock);
718	pthread_mutex_lock (&reslock);	1016	LOCK (reqlock);
		1017	LOCK (reslock);
719	#if !HAVE_PREADWRITE	1018	#if !HAVE_PREADWRITE
720	pthread_mutex_lock (&preadwritelock);	1019	LOCK (preadwritelock);
721	#endif	1020	#endif
722	#if !HAVE_READDIR_R	1021	#if !HAVE_READDIR_R
723	pthread_mutex_lock (&readdirlock);	1022	LOCK (readdirlock);
724	#endif	1023	#endif
725	}	1024	}
726		1025
727	static void atfork_parent (void)	1026	static void atfork_parent (void)
728	{	1027	{
729	#if !HAVE_READDIR_R	1028	#if !HAVE_READDIR_R
730	pthread_mutex_unlock (&readdirlock);	1029	UNLOCK (readdirlock);
731	#endif	1030	#endif
732	#if !HAVE_PREADWRITE	1031	#if !HAVE_PREADWRITE
733	pthread_mutex_unlock (&preadwritelock);	1032	UNLOCK (preadwritelock);
734	#endif	1033	#endif
735	pthread_mutex_unlock (&reslock);	1034	UNLOCK (reslock);
736	pthread_mutex_unlock (&reqlock);	1035	UNLOCK (reqlock);
		1036	UNLOCK (wrklock);
737	}	1037	}
738		1038
739	static void atfork_child (void)	1039	static void atfork_child (void)
740	{	1040	{
741	aio_req prv;	1041	aio_req prv;
742		1042
		1043	while (prv = reqq_shift (&req_queue))
		1044	req_free (prv);
		1045
		1046	while (prv = reqq_shift (&res_queue))
		1047	req_free (prv);
		1048
		1049	while (wrk_first.next != &wrk_first)
		1050	{
		1051	worker *wrk = wrk_first.next;
		1052
		1053	if (wrk->req)
		1054	req_free (wrk->req);
		1055
		1056	worker_clear (wrk);
		1057	worker_free (wrk);
		1058	}
		1059
743	started = 0;	1060	started = 0;
744		1061	nreqs = 0;
745	while (reqs)
746	{
747	prv = reqs;
748	reqs = prv->next;
749	free_req (prv);
750	}
751
752	reqs = reqe = 0;
753
754	while (ress)
755	{
756	prv = ress;
757	ress = prv->next;
758	free_req (prv);
759	}
760
761	ress = rese = 0;
762		1062
763	close (respipe [0]);	1063	close (respipe [0]);
764	close (respipe [1]);	1064	close (respipe [1]);
765	create_pipe ();	1065	create_pipe ();
766		1066
767	atfork_parent ();	1067	atfork_parent ();
768	}	1068	}
769		1069
770	#define dREQ \	1070	#define dREQ \
771	aio_req req; \	1071	aio_req req; \
		1072	int req_pri = next_pri; \
		1073	next_pri = DEFAULT_PRI + PRI_BIAS; \
772	\	1074	\
773	if (SvOK (callback) && !SvROK (callback)) \	1075	if (SvOK (callback) && !SvROK (callback)) \
774	croak ("clalback must be undef or of reference type"); \	1076	croak ("callback must be undef or of reference type"); \
775	\	1077	\
776	Newz (0, req, 1, aio_cb); \	1078	Newz (0, req, 1, aio_cb); \
777	if (!req) \	1079	if (!req) \
778	croak ("out of memory during aio_req allocation"); \	1080	croak ("out of memory during aio_req allocation"); \
779	\	1081	\
780	req->callback = newSVsv (callback);	1082	req->callback = newSVsv (callback); \
		1083	req->pri = req_pri
		1084
		1085	#define REQ_SEND \
		1086	req_send (req); \
		1087	\
		1088	if (GIMME_V != G_VOID) \
		1089	XPUSHs (req_sv (req, AIO_REQ_KLASS));
781		1090
782	MODULE = IO::AIO PACKAGE = IO::AIO	1091	MODULE = IO::AIO PACKAGE = IO::AIO
783		1092
784	PROTOTYPES: ENABLE	1093	PROTOTYPES: ENABLE
785		1094
…		…
801		1110
802	void	1111	void
803	max_parallel (nthreads)	1112	max_parallel (nthreads)
804	int nthreads	1113	int nthreads
805	PROTOTYPE: $	1114	PROTOTYPE: $
806
807	int
808	max_outstanding (nreqs)
809	int nreqs
810	PROTOTYPE: $
811	CODE:
812	RETVAL = max_outstanding;
813	max_outstanding = nreqs;
814		1115
815	void	1116	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	1117	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
817	SV * pathname	1118	SV * pathname
818	int flags	1119	int flags
819	int mode	1120	int mode
820	SV * callback	1121	SV * callback
821	PROTOTYPE: $$$;$	1122	PROTOTYPE: $$$;$
822	CODE:	1123	PPCODE:
823	{	1124	{
824	dREQ;	1125	dREQ;
825		1126
826	req->type = REQ_OPEN;	1127	req->type = REQ_OPEN;
827	req->data = newSVsv (pathname);	1128	req->data = newSVsv (pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);	1129	req->dataptr = SvPVbyte_nolen (req->data);
829	req->fd = flags;	1130	req->fd = flags;
830	req->mode = mode;	1131	req->mode = mode;
831		1132
832	send_req (req);	1133	REQ_SEND;
833	}	1134	}
834		1135
835	void	1136	void
836	aio_close (fh,callback=&PL_sv_undef)	1137	aio_close (fh,callback=&PL_sv_undef)
837	SV * fh	1138	SV * fh
…		…
839	PROTOTYPE: $;$	1140	PROTOTYPE: $;$
840	ALIAS:	1141	ALIAS:
841	aio_close = REQ_CLOSE	1142	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	1143	aio_fsync = REQ_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	1144	aio_fdatasync = REQ_FDATASYNC
844	CODE:	1145	PPCODE:
845	{	1146	{
846	dREQ;	1147	dREQ;
847		1148
848	req->type = ix;	1149	req->type = ix;
849	req->fh = newSVsv (fh);	1150	req->fh = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1151	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
851		1152
852	send_req (req);	1153	REQ_SEND (req);
853	}	1154	}
854		1155
855	void	1156	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1157	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
857	SV * fh	1158	SV * fh
…		…
862	SV * callback	1163	SV * callback
863	ALIAS:	1164	ALIAS:
864	aio_read = REQ_READ	1165	aio_read = REQ_READ
865	aio_write = REQ_WRITE	1166	aio_write = REQ_WRITE
866	PROTOTYPE: $$$$$;$	1167	PROTOTYPE: $$$$$;$
867	CODE:	1168	PPCODE:
868	{	1169	{
869	aio_req req;	1170	aio_req req;
870	STRLEN svlen;	1171	STRLEN svlen;
871	char *svptr = SvPVbyte (data, svlen);	1172	char *svptr = SvPVbyte (data, svlen);
872		1173
…		…
910	{	1211	{
911	SvREADONLY_on (data);	1212	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	1213	req->data2ptr = (void *)data;
913	}	1214	}
914		1215
915	send_req (req);	1216	REQ_SEND;
916	}	1217	}
917	}	1218	}
918		1219
919	void	1220	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1221	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
…		…
922	SV * in_fh	1223	SV * in_fh
923	UV in_offset	1224	UV in_offset
924	UV length	1225	UV length
925	SV * callback	1226	SV * callback
926	PROTOTYPE: $$$$;$	1227	PROTOTYPE: $$$$;$
927	CODE:	1228	PPCODE:
928	{	1229	{
929	dREQ;	1230	dREQ;
930		1231
931	req->type = REQ_SENDFILE;	1232	req->type = REQ_SENDFILE;
932	req->fh = newSVsv (out_fh);	1233	req->fh = newSVsv (out_fh);
…		…
934	req->fh2 = newSVsv (in_fh);	1235	req->fh2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1236	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
936	req->offset = in_offset;	1237	req->offset = in_offset;
937	req->length = length;	1238	req->length = length;
938		1239
939	send_req (req);	1240	REQ_SEND;
940	}	1241	}
941		1242
942	void	1243	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1244	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
944	SV * fh	1245	SV * fh
945	UV offset	1246	UV offset
946	IV length	1247	IV length
947	SV * callback	1248	SV * callback
948	PROTOTYPE: $$$;$	1249	PROTOTYPE: $$$;$
949	CODE:	1250	PPCODE:
950	{	1251	{
951	dREQ;	1252	dREQ;
952		1253
953	req->type = REQ_READAHEAD;	1254	req->type = REQ_READAHEAD;
954	req->fh = newSVsv (fh);	1255	req->fh = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1256	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
956	req->offset = offset;	1257	req->offset = offset;
957	req->length = length;	1258	req->length = length;
958		1259
959	send_req (req);	1260	REQ_SEND;
960	}	1261	}
961		1262
962	void	1263	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	1264	aio_stat (fh_or_path,callback=&PL_sv_undef)
964	SV * fh_or_path	1265	SV * fh_or_path
965	SV * callback	1266	SV * callback
966	ALIAS:	1267	ALIAS:
967	aio_stat = REQ_STAT	1268	aio_stat = REQ_STAT
968	aio_lstat = REQ_LSTAT	1269	aio_lstat = REQ_LSTAT
969	CODE:	1270	PPCODE:
970	{	1271	{
971	dREQ;	1272	dREQ;
972		1273
973	New (0, req->statdata, 1, Stat_t);	1274	New (0, req->statdata, 1, Stat_t);
974	if (!req->statdata)	1275	if (!req->statdata)
975	{	1276	{
976	free_req (req);	1277	req_free (req);
977	croak ("out of memory during aio_req->statdata allocation");	1278	croak ("out of memory during aio_req->statdata allocation");
978	}	1279	}
979		1280
980	if (SvPOK (fh_or_path))	1281	if (SvPOK (fh_or_path))
981	{	1282	{
…		…
988	req->type = REQ_FSTAT;	1289	req->type = REQ_FSTAT;
989	req->fh = newSVsv (fh_or_path);	1290	req->fh = newSVsv (fh_or_path);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1291	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
991	}	1292	}
992		1293
993	send_req (req);	1294	REQ_SEND;
994	}	1295	}
995		1296
996	void	1297	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	1298	aio_unlink (pathname,callback=&PL_sv_undef)
998	SV * pathname	1299	SV * pathname
999	SV * callback	1300	SV * callback
1000	ALIAS:	1301	ALIAS:
1001	aio_unlink = REQ_UNLINK	1302	aio_unlink = REQ_UNLINK
1002	aio_rmdir = REQ_RMDIR	1303	aio_rmdir = REQ_RMDIR
1003	aio_readdir = REQ_READDIR	1304	aio_readdir = REQ_READDIR
1004	CODE:	1305	PPCODE:
1005	{	1306	{
1006	dREQ;	1307	dREQ;
1007		1308
1008	req->type = ix;	1309	req->type = ix;
1009	req->data = newSVsv (pathname);	1310	req->data = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	1311	req->dataptr = SvPVbyte_nolen (req->data);
1011		1312
1012	send_req (req);	1313	REQ_SEND;
1013	}	1314	}
1014		1315
1015	void	1316	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1317	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1017	SV * oldpath	1318	SV * oldpath
…		…
1019	SV * callback	1320	SV * callback
1020	ALIAS:	1321	ALIAS:
1021	aio_link = REQ_LINK	1322	aio_link = REQ_LINK
1022	aio_symlink = REQ_SYMLINK	1323	aio_symlink = REQ_SYMLINK
1023	aio_rename = REQ_RENAME	1324	aio_rename = REQ_RENAME
1024	CODE:	1325	PPCODE:
1025	{	1326	{
1026	dREQ;	1327	dREQ;
1027		1328
1028	req->type = ix;	1329	req->type = ix;
1029	req->fh = newSVsv (oldpath);	1330	req->fh = newSVsv (oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	1331	req->data2ptr = SvPVbyte_nolen (req->fh);
1031	req->data = newSVsv (newpath);	1332	req->data = newSVsv (newpath);
1032	req->dataptr = SvPVbyte_nolen (req->data);	1333	req->dataptr = SvPVbyte_nolen (req->data);
1033		1334
1034	send_req (req);	1335	REQ_SEND;
1035	}	1336	}
		1337
		1338	void
		1339	aio_busy (delay,callback=&PL_sv_undef)
		1340	double delay
		1341	SV * callback
		1342	PPCODE:
		1343	{
		1344	dREQ;
		1345
		1346	req->type = REQ_BUSY;
		1347	req->fd = delay < 0. ? 0 : delay;
		1348	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1349
		1350	REQ_SEND;
		1351	}
		1352
		1353	void
		1354	aio_group (callback=&PL_sv_undef)
		1355	SV * callback
		1356	PROTOTYPE: ;$
		1357	PPCODE:
		1358	{
		1359	dREQ;
		1360
		1361	req->type = REQ_GROUP;
		1362	req_send (req);
		1363
		1364	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1365	}
		1366
		1367	void
		1368	aio_nop (callback=&PL_sv_undef)
		1369	SV * callback
		1370	PPCODE:
		1371	{
		1372	dREQ;
		1373
		1374	req->type = REQ_NOP;
		1375
		1376	REQ_SEND;
		1377	}
		1378
		1379	void
		1380	aioreq_pri (int pri = DEFAULT_PRI)
		1381	CODE:
		1382	if (pri < PRI_MIN) pri = PRI_MIN;
		1383	if (pri > PRI_MAX) pri = PRI_MAX;
		1384	next_pri = pri + PRI_BIAS;
		1385
		1386	void
		1387	aioreq_nice (int nice = 0)
		1388	CODE:
		1389	nice = next_pri - nice;
		1390	if (nice < PRI_MIN) nice = PRI_MIN;
		1391	if (nice > PRI_MAX) nice = PRI_MAX;
		1392	next_pri = nice + PRI_BIAS;
1036		1393
1037	void	1394	void
1038	flush ()	1395	flush ()
1039	PROTOTYPE:	1396	PROTOTYPE:
1040	CODE:	1397	CODE:
…		…
1083	CODE:	1440	CODE:
1084	RETVAL = nreqs;	1441	RETVAL = nreqs;
1085	OUTPUT:	1442	OUTPUT:
1086	RETVAL	1443	RETVAL
1087		1444
		1445	PROTOTYPES: DISABLE
		1446
		1447	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1448
		1449	void
		1450	cancel (aio_req_ornot req)
		1451	CODE:
		1452	req_cancel (req);
		1453
		1454	void
		1455	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1456	CODE:
		1457	SvREFCNT_dec (req->callback);
		1458	req->callback = newSVsv (callback);
		1459
		1460	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1461
		1462	void
		1463	add (aio_req grp, ...)
		1464	PPCODE:
		1465	{
		1466	int i;
		1467	aio_req req;
		1468
		1469	if (grp->fd == 2)
		1470	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1471
		1472	for (i = 1; i < items; ++i )
		1473	{
		1474	if (GIMME_V != G_VOID)
		1475	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1476
		1477	req = SvAIO_REQ (ST (i));
		1478
		1479	if (req)
		1480	{
		1481	++grp->length;
		1482	req->grp = grp;
		1483
		1484	req->grp_prev = 0;
		1485	req->grp_next = grp->grp_first;
		1486
		1487	if (grp->grp_first)
		1488	grp->grp_first->grp_prev = req;
		1489
		1490	grp->grp_first = req;
		1491	}
		1492	}
		1493	}
		1494
		1495	void
		1496	cancel_subs (aio_req_ornot req)
		1497	CODE:
		1498	req_cancel_subs (req);
		1499
		1500	void
		1501	result (aio_req grp, ...)
		1502	CODE:
		1503	{
		1504	int i;
		1505	AV *av = newAV ();
		1506
		1507	for (i = 1; i < items; ++i )
		1508	av_push (av, newSVsv (ST (i)));
		1509
		1510	SvREFCNT_dec (grp->data);
		1511	grp->data = (SV *)av;
		1512	}
		1513
		1514	void
		1515	limit (aio_req grp, int limit)
		1516	CODE:
		1517	grp->fd2 = limit;
		1518	aio_grp_feed (grp);
		1519
		1520	void
		1521	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1522	CODE:
		1523	{
		1524	SvREFCNT_dec (grp->fh2);
		1525	grp->fh2 = newSVsv (callback);
		1526
		1527	if (grp->fd2 <= 0)
		1528	grp->fd2 = 2;
		1529
		1530	aio_grp_feed (grp);
		1531	}
		1532

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