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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.39 by root, Mon Feb 6 23:54:12 2006 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"
…		…
8	#include "autoconf/config.h"	16	#include "autoconf/config.h"
9		17
10	#include <pthread.h>	18	#include <pthread.h>
11		19
12	#include <stddef.h>	20	#include <stddef.h>
		21	#include <errno.h>
		22	#include <sys/time.h>
		23	#include <sys/select.h>
13	#include <sys/types.h>	24	#include <sys/types.h>
14	#include <sys/stat.h>	25	#include <sys/stat.h>
15	#include <limits.h>	26	#include <limits.h>
16	#include <unistd.h>	27	#include <unistd.h>
17	#include <fcntl.h>	28	#include <fcntl.h>
…		…
38	# define NAME_MAX 4096	49	# define NAME_MAX 4096
39	#endif	50	#endif
40		51
41	#if __ia64	52	#if __ia64
42	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
43	#else	56	#else
44	# define STACKSIZE 8192	57	# define STACKSIZE 16384
45	#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;
46		70
47	enum {	71	enum {
48	REQ_QUIT,	72	REQ_QUIT,
49	REQ_OPEN, REQ_CLOSE,	73	REQ_OPEN, REQ_CLOSE,
50	REQ_READ, REQ_WRITE, REQ_READAHEAD,	74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
51	REQ_SENDFILE,	75	REQ_SENDFILE,
52	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
53	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
54	REQ_UNLINK, REQ_RMDIR,	78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
55	REQ_READDIR,	79	REQ_READDIR,
56	REQ_SYMLINK,	80	REQ_LINK, REQ_SYMLINK,
		81	REQ_GROUP, REQ_NOP,
		82	REQ_BUSY,
57	};	83	};
58		84
		85	#define AIO_REQ_KLASS "IO::AIO::REQ"
		86	#define AIO_GRP_KLASS "IO::AIO::GRP"
		87
59	typedef struct aio_cb {	88	typedef struct aio_cb
		89	{
60	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
61		91
62	int type;	92	SV *data, *callback;
63		93	SV *fh, *fh2;
64	/* should receive a cleanup, with unions */	94	void *dataptr, *data2ptr;
65	int fd, fd2;	95	Stat_t *statdata;
66	off_t offset;	96	off_t offset;
67	size_t length;	97	size_t length;
68	ssize_t result;	98	ssize_t result;
		99
		100	STRLEN dataoffset;
		101	int type;
		102	int fd, fd2;
		103	int errorno;
69	mode_t mode; /* open */	104	mode_t mode; /* open */
70	int errorno;
71	SV *data, *callback;
72	SV *fh, *fh2;
73	void *dataptr, *data2ptr;
74	STRLEN dataoffset;
75		105
76	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;
77	} aio_cb;	111	} aio_cb;
78		112
		113	enum {
		114	FLAG_CANCELLED = 0x01,
		115	};
		116
79	typedef aio_cb *aio_req;	117	typedef aio_cb *aio_req;
		118	typedef aio_cb *aio_req_ornot;
		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;
80		130
81	static int started, wanted;	131	static int started, wanted;
82	static volatile int nreqs;	132	static volatile int nreqs;
83	static int max_outstanding = 1<<30;
84	static int respipe [2];	133	static int respipe [2];
85		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
86	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
87	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
88	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
89		187
90	static volatile aio_req reqs, reqe; /* queue start, queue end */	188	/*
91	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;
92		197
		198	static reqq req_queue;
		199	static reqq res_queue;
		200
		201	int reqq_push (reqq *q, aio_req req)
		202	{
		203	int pri = req->pri;
		204	req->next = 0;
		205
		206	if (q->qe[pri])
		207	{
		208	q->qe[pri]->next = req;
		209	q->qe[pri] = req;
		210	}
		211	else
		212	q->qe[pri] = q->qs[pri] = req;
		213
		214	return q->size++;
		215	}
		216
		217	aio_req reqq_shift (reqq *q)
		218	{
		219	int pri;
		220
		221	if (!q->size)
		222	return 0;
		223
		224	--q->size;
		225
		226	for (pri = NUM_PRI; pri--; )
		227	{
		228	aio_req req = q->qs[pri];
		229
		230	if (req)
		231	{
		232	if (!(q->qs[pri] = req->next))
		233	q->qe[pri] = 0;
		234
		235	return req;
		236	}
		237	}
		238
		239	abort ();
		240	}
		241
		242	static int poll_cb ();
		243	static void req_invoke (aio_req req);
93	static void free_req (aio_req req)	244	static void req_free (aio_req req);
94	{	245	static void req_cancel (aio_req req);
95	if (req->data)
96	SvREFCNT_dec (req->data);
97		246
		247	/* must be called at most once */
		248	static SV *req_sv (aio_req req, const char *klass)
		249	{
98	if (req->fh)	250	if (!req->self)
99	SvREFCNT_dec (req->fh);	251	{
		252	req->self = (SV *)newHV ();
		253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		254	}
100		255
101	if (req->fh2)	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	{
102	SvREFCNT_dec (req->fh2);	295	SvREFCNT_dec (grp->fh2);
103		296	grp->fh2 = 0;
104	if (req->statdata)	297	break;
105	Safefree (req->statdata);	298	}
106
107	if (req->callback)
108	SvREFCNT_dec (req->callback);
109
110	if (req->type == REQ_READDIR && req->result >= 0)
111	free (req->data2ptr);
112
113	Safefree (req);
114	}
115
116	static void
117	poll_wait ()
118	{
119	if (nreqs && !ress)
120	{	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	{
121	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
122	FD_ZERO(&rfd);	335	FD_ZERO(&rfd);
123	FD_SET(respipe [0], &rfd);	336	FD_SET(respipe [0], &rfd);
124		337
125	select (respipe [0] + 1, &rfd, 0, 0, 0);	338	select (respipe [0] + 1, &rfd, 0, 0, 0);
126	}	339	}
127	}	340	}
128		341
129	static int	342	static void req_invoke (aio_req req)
130	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 ()
131	{	496	{
132	dSP;	497	dSP;
133	int count = 0;	498	int count = 0;
134	int do_croak = 0;	499	int do_croak = 0;
135	aio_req req;	500	aio_req req;
136		501
137	for (;;)	502	for (;;)
138	{	503	{
139	pthread_mutex_lock (&reslock);	504	LOCK (reslock);
140	req = ress;	505	req = reqq_shift (&res_queue);
141		506
142	if (req)	507	if (req)
143	{	508	{
144	ress = req->next;
145
146	if (!ress)	509	if (!res_queue.size)
147	{	510	{
148	/* read any signals sent by the worker threads */	511	/* read any signals sent by the worker threads */
149	char buf [32];	512	char buf [32];
150	while (read (respipe [0], buf, 32) == 32)	513	while (read (respipe [0], buf, 32) == 32)
151	;	514	;
152
153	rese = 0;
154	}	515	}
155	}	516	}
156		517
157	pthread_mutex_unlock (&reslock);	518	UNLOCK (reslock);
158		519
159	if (!req)	520	if (!req)
160	break;	521	break;
161		522
162	nreqs--;	523	--nreqs;
163		524
164	if (req->type == REQ_QUIT)	525	if (req->type == REQ_QUIT)
165	started--;	526	started--;
		527	else if (req->type == REQ_GROUP && req->length)
		528	{
		529	req->fd = 1; /* mark request as delayed */
		530	continue;
		531	}
166	else	532	else
167	{	533	{
168	int errorno = errno;
169	errno = req->errorno;
170
171	if (req->type == REQ_READ)	534	if (req->type == REQ_READ)
172	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
173		536
174	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
175	SvREADONLY_off (req->data);	538	SvREADONLY_off (req->data);
…		…
179	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
180	PL_laststatval = req->result;	543	PL_laststatval = req->result;
181	PL_statcache = *(req->statdata);	544	PL_statcache = *(req->statdata);
182	}	545	}
183		546
184	ENTER;	547	req_invoke (req);
185	PUSHMARK (SP);
186		548
187	if (req->type == REQ_READDIR)
188	{
189	SV *rv = &PL_sv_undef;
190
191	if (req->result >= 0)
192	{
193	char *buf = req->data2ptr;
194	AV *av = newAV ();
195
196	while (req->result)
197	{
198	SV *sv = newSVpv (buf, 0);
199
200	av_push (av, sv);
201	buf += SvCUR (sv) + 1;
202	req->result--;
203	}
204
205	rv = sv_2mortal (newRV_noinc ((SV *)av));
206	}
207
208	XPUSHs (rv);
209	}
210	else
211	{
212	XPUSHs (sv_2mortal (newSViv (req->result)));
213
214	if (req->type == REQ_OPEN)
215	{
216	/* convert fd to fh */
217	SV *fh;
218
219	PUTBACK;
220	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
221	SPAGAIN;
222
223	fh = SvREFCNT_inc (POPs);
224
225	PUSHMARK (SP);
226	XPUSHs (sv_2mortal (fh));
227	}
228	}
229
230	if (SvOK (req->callback))
231	{
232	PUTBACK;
233	call_sv (req->callback, G_VOID | G_EVAL);
234	SPAGAIN;
235
236	if (SvTRUE (ERRSV))
237	{
238	free_req (req);
239	croak (0);
240	}
241	}
242
243	LEAVE;
244
245	errno = errorno;
246	count++;	549	count++;
247	}	550	}
248		551
249	free_req (req);	552	req_free (req);
250	}	553	}
251		554
252	return count;	555	return count;
253	}	556	}
254		557
255	static void *aio_proc(void *arg);	558	static void *aio_proc(void *arg);
256		559
257	static void
258	start_thread (void)	560	static void start_thread (void)
259	{	561	{
260	sigset_t fullsigset, oldsigset;	562	sigset_t fullsigset, oldsigset;
261	pthread_t tid;
262	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");
263		569
264	pthread_attr_init (&attr);	570	pthread_attr_init (&attr);
265	pthread_attr_setstacksize (&attr, STACKSIZE);	571	pthread_attr_setstacksize (&attr, STACKSIZE);
266	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
267		573
268	sigfillset (&fullsigset);	574	sigfillset (&fullsigset);
		575
		576	LOCK (wrklock);
269	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
270		578
271	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;
272	started++;	585	started++;
		586	}
		587	else
		588	free (wrk);
273		589
274	sigprocmask (SIG_SETMASK, &oldsigset, 0);	590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		591	UNLOCK (wrklock);
275	}	592	}
276		593
277	static void	594	static void req_send (aio_req req)
278	send_req (aio_req req)
279	{	595	{
280	while (started < wanted && nreqs >= started)	596	while (started < wanted && nreqs >= started)
281	start_thread ();	597	start_thread ();
282		598
283	nreqs++;	599	++nreqs;
284		600
285	pthread_mutex_lock (&reqlock);	601	LOCK (reqlock);
286		602	reqq_push (&req_queue, req);
287	req->next = 0;
288
289	if (reqe)
290	{
291	reqe->next = req;
292	reqe = req;
293	}
294	else
295	reqe = reqs = req;
296
297	pthread_cond_signal (&reqwait);	603	pthread_cond_signal (&reqwait);
298	pthread_mutex_unlock (&reqlock);	604	UNLOCK (reqlock);
299
300	if (nreqs > max_outstanding)
301	for (;;)
302	{
303	poll_cb ();
304
305	if (nreqs <= max_outstanding)
306	break;
307
308	poll_wait ();
309	}
310	}	605	}
311		606
312	static void	607	static void end_thread (void)
313	end_thread (void)
314	{	608	{
315	aio_req req;	609	aio_req req;
		610
316	Newz (0, req, 1, aio_cb);	611	Newz (0, req, 1, aio_cb);
		612
317	req->type = REQ_QUIT;	613	req->type = REQ_QUIT;
		614	req->pri = PRI_MAX + PRI_BIAS;
318		615
319	send_req (req);	616	req_send (req);
320	}	617	}
321		618
322	static void min_parallel (int nthreads)	619	static void min_parallel (int nthreads)
323	{	620	{
324	if (wanted < nthreads)	621	if (wanted < nthreads)
…		…
369	* 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,
370	* but that's your problem, not mine.	667	* but that's your problem, not mine.
371	*/	668	*/
372	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;	669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
373		670
374	static ssize_t	671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
375	pread (int fd, void *buf, size_t count, off_t offset)
376	{	672	{
377	ssize_t res;	673	ssize_t res;
378	off_t ooffset;	674	off_t ooffset;
379		675
380	pthread_mutex_lock (&preadwritelock);	676	LOCK (preadwritelock);
381	ooffset = lseek (fd, 0, SEEK_CUR);	677	ooffset = lseek (fd, 0, SEEK_CUR);
382	lseek (fd, offset, SEEK_SET);	678	lseek (fd, offset, SEEK_SET);
383	res = read (fd, buf, count);	679	res = read (fd, buf, count);
384	lseek (fd, ooffset, SEEK_SET);	680	lseek (fd, ooffset, SEEK_SET);
385	pthread_mutex_unlock (&preadwritelock);	681	UNLOCK (preadwritelock);
386		682
387	return res;	683	return res;
388	}	684	}
389		685
390	static ssize_t
391	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)
392	{	687	{
393	ssize_t res;	688	ssize_t res;
394	off_t ooffset;	689	off_t ooffset;
395		690
396	pthread_mutex_lock (&preadwritelock);	691	LOCK (preadwritelock);
397	ooffset = lseek (fd, 0, SEEK_CUR);	692	ooffset = lseek (fd, 0, SEEK_CUR);
398	lseek (fd, offset, SEEK_SET);	693	lseek (fd, offset, SEEK_SET);
399	res = write (fd, buf, count);	694	res = write (fd, buf, count);
400	lseek (fd, offset, SEEK_SET);	695	lseek (fd, offset, SEEK_SET);
401	pthread_mutex_unlock (&preadwritelock);	696	UNLOCK (preadwritelock);
402		697
403	return res;	698	return res;
404	}	699	}
405	#endif	700	#endif
406		701
…		…
409	#endif	704	#endif
410		705
411	#if !HAVE_READAHEAD	706	#if !HAVE_READAHEAD
412	# define readahead aio_readahead	707	# define readahead aio_readahead
413		708
414	static ssize_t
415	readahead (int fd, off_t offset, size_t count)	709	static ssize_t readahead (int fd, off_t offset, size_t count)
416	{	710	{
417	char readahead_buf[4096];	711	dBUF;
418		712
419	while (count > 0)	713	while (count > 0)
420	{	714	{
421	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
422		716
423	pread (fd, readahead_buf, len, offset);	717	pread (fd, aio_buf, len, offset);
424	offset += len;	718	offset += len;
425	count -= len;	719	count -= len;
426	}	720	}
427		721
428	errno = 0;	722	errno = 0;
…		…
432	#if !HAVE_READDIR_R	726	#if !HAVE_READDIR_R
433	# define readdir_r aio_readdir_r	727	# define readdir_r aio_readdir_r
434		728
435	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;	729	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
436		730
437	static int
438	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)	731	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
439	{	732	{
440	struct dirent *e;	733	struct dirent *e;
441	int errorno;	734	int errorno;
442		735
443	pthread_mutex_lock (&readdirlock);	736	LOCK (readdirlock);
444		737
445	e = readdir (dirp);	738	e = readdir (dirp);
446	errorno = errno;	739	errorno = errno;
447		740
448	if (e)	741	if (e)
…		…
451	strcpy (ent->d_name, e->d_name);	744	strcpy (ent->d_name, e->d_name);
452	}	745	}
453	else	746	else
454	*res = 0;	747	*res = 0;
455		748
456	pthread_mutex_unlock (&readdirlock);	749	UNLOCK (readdirlock);
457		750
458	errno = errorno;	751	errno = errorno;
459	return e ? 0 : -1;	752	return e ? 0 : -1;
460	}	753	}
461	#endif	754	#endif
462		755
463	/* sendfile always needs emulation */	756	/* sendfile always needs emulation */
464	static ssize_t
465	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	757	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
466	{	758	{
467	ssize_t res;	759	ssize_t res;
468		760
469	if (!count)	761	if (!count)
470	return 0;	762	return 0;
…		…
519	#endif	811	#endif
520	)	812	)
521	)	813	)
522	{	814	{
523	/* emulate sendfile. this is a major pain in the ass */	815	/* emulate sendfile. this is a major pain in the ass */
524	char buf[4096];	816	dBUF;
		817
525	res = 0;	818	res = 0;
526		819
527	while (count)	820	while (count)
528	{	821	{
529	ssize_t cnt;	822	ssize_t cnt;
530		823
531	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);	824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
532		825
533	if (cnt <= 0)	826	if (cnt <= 0)
534	{	827	{
535	if (cnt && !res) res = -1;	828	if (cnt && !res) res = -1;
536	break;	829	break;
537	}	830	}
538		831
539	cnt = write (ofd, buf, cnt);	832	cnt = write (ofd, aio_buf, cnt);
540		833
541	if (cnt <= 0)	834	if (cnt <= 0)
542	{	835	{
543	if (cnt && !res) res = -1;	836	if (cnt && !res) res = -1;
544	break;	837	break;
…		…
552		845
553	return res;	846	return res;
554	}	847	}
555		848
556	/* read a full directory */	849	/* read a full directory */
557	static int	850	static void scandir_ (aio_req req, worker *self)
558	scandir_ (const char *path, void **namesp)
559	{	851	{
560	DIR *dirp = opendir (path);	852	DIR *dirp;
561	union	853	union
562	{	854	{
563	struct dirent d;	855	struct dirent d;
564	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];	856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
565	} u;	857	} *u;
566	struct dirent *entp;	858	struct dirent *entp;
567	char *name, *names;	859	char *name, *names;
568	int memlen = 4096;	860	int memlen = 4096;
569	int memofs = 0;	861	int memofs = 0;
570	int res = 0;	862	int res = 0;
571	int errorno;	863	int errorno;
572		864
573	if (!dirp)	865	LOCK (wrklock);
574	return -1;	866	self->dirp = dirp = opendir (req->dataptr);
		867	self->dbuf = u = malloc (sizeof (*u));
		868	UNLOCK (wrklock);
575		869
576	names = malloc (memlen);	870	req->data2ptr = names = malloc (memlen);
577		871
		872	if (dirp && u && names)
578	for (;;)	873	for (;;)
579	{	874	{
		875	errno = 0;
580	errno = 0, readdir_r (dirp, &u.d, &entp);	876	readdir_r (dirp, &u->d, &entp);
581		877
582	if (!entp)	878	if (!entp)
583	break;	879	break;
584		880
585	name = entp->d_name;	881	name = entp->d_name;
586		882
587	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))	883	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
588	{	884	{
589	int len = strlen (name) + 1;	885	int len = strlen (name) + 1;
590		886
591	res++;	887	res++;
592		888
593	while (memofs + len > memlen)	889	while (memofs + len > memlen)
594	{	890	{
595	memlen *= 2;	891	memlen *= 2;
		892	LOCK (wrklock);
596	names = realloc (names, memlen);	893	req->data2ptr = names = realloc (names, memlen);
		894	UNLOCK (wrklock);
		895
597	if (!names)	896	if (!names)
598	break;	897	break;
599	}	898	}
600		899
601	memcpy (names + memofs, name, len);	900	memcpy (names + memofs, name, len);
602	memofs += len;	901	memofs += len;
603	}	902	}
604	}	903	}
605		904
606	errorno = errno;
607	closedir (dirp);
608
609	if (errorno)	905	if (errno)
610	{
611	free (names);
612	errno = errorno;
613	res = -1;	906	res = -1;
614	}	907
615		908	req->result = res;
616	*namesp = (void *)names;
617	return res;
618	}	909	}
619		910
620	/*****************************************************************************/	911	/*****************************************************************************/
621		912
622	static void *
623	aio_proc (void *thr_arg)	913	static void *aio_proc (void *thr_arg)
624	{	914	{
625	aio_req req;	915	aio_req req;
626	int type;	916	int type;
		917	worker *self = (worker *)thr_arg;
627		918
628	do	919	do
629	{	920	{
630	pthread_mutex_lock (&reqlock);	921	LOCK (reqlock);
631		922
632	for (;;)	923	for (;;)
633	{	924	{
634	req = reqs;	925	self->req = req = reqq_shift (&req_queue);
635
636	if (reqs)
637	{
638	reqs = reqs->next;
639	if (!reqs) reqe = 0;
640	}
641		926
642	if (req)	927	if (req)
643	break;	928	break;
644		929
645	pthread_cond_wait (&reqwait, &reqlock);	930	pthread_cond_wait (&reqwait, &reqlock);
646	}	931	}
647		932
648	pthread_mutex_unlock (&reqlock);	933	UNLOCK (reqlock);
649		934
650	errno = 0; /* strictly unnecessary */	935	errno = 0; /* strictly unnecessary */
		936	type = req->type; /* remember type for QUIT check */
651		937
652	type = req->type;	938	if (!(req->flags & FLAG_CANCELLED))
653
654	switch (type)	939	switch (type)
655	{	940	{
656	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;
657	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;
658		943
659	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;
660	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;	945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
661		946
662	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
663	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
664	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
665		950
666	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;
667	case REQ_CLOSE: req->result = close (req->fd); break;	952	case REQ_CLOSE: req->result = close (req->fd); break;
668	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
669	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;
670	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
671		958
672	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
673	case REQ_FSYNC: req->result = fsync (req->fd); break;	960	case REQ_FSYNC: req->result = fsync (req->fd); break;
674	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;	961	case REQ_READDIR: scandir_ (req, self); break;
675		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:
676	case REQ_QUIT:	975	case REQ_QUIT:
677	break;	976	break;
678		977
679	default:	978	default:
680	req->result = ENOSYS;	979	req->result = ENOSYS;
681	break;	980	break;
682	}	981	}
683		982
684	req->errorno = errno;	983	req->errorno = errno;
685		984
686	pthread_mutex_lock (&reslock);	985	LOCK (reslock);
687		986
688	req->next = 0;	987	if (!reqq_push (&res_queue, req))
689
690	if (rese)
691	{
692	rese->next = req;
693	rese = req;
694	}
695	else
696	{
697	rese = ress = req;
698
699	/* write a dummy byte to the pipe so fh becomes ready */	988	/* write a dummy byte to the pipe so fh becomes ready */
700	write (respipe [1], &respipe, 1);	989	write (respipe [1], &respipe, 1);
701	}
702		990
703	pthread_mutex_unlock (&reslock);	991	self->req = 0;
		992	worker_clear (self);
		993
		994	UNLOCK (reslock);
704	}	995	}
705	while (type != REQ_QUIT);	996	while (type != REQ_QUIT);
706		997
		998	LOCK (wrklock);
		999	worker_free (self);
		1000	UNLOCK (wrklock);
		1001
707	return 0;	1002	return 0;
708	}	1003	}
709		1004
710	/*****************************************************************************/	1005	/*****************************************************************************/
711		1006
712	static void atfork_prepare (void)	1007	static void atfork_prepare (void)
713	{	1008	{
714	pthread_mutex_lock (&reqlock);	1009	LOCK (wrklock);
715	pthread_mutex_lock (&reslock);	1010	LOCK (reqlock);
		1011	LOCK (reslock);
716	#if !HAVE_PREADWRITE	1012	#if !HAVE_PREADWRITE
717	pthread_mutex_lock (&preadwritelock);	1013	LOCK (preadwritelock);
718	#endif	1014	#endif
719	#if !HAVE_READDIR_R	1015	#if !HAVE_READDIR_R
720	pthread_mutex_lock (&readdirlock);	1016	LOCK (readdirlock);
721	#endif	1017	#endif
722	}	1018	}
723		1019
724	static void atfork_parent (void)	1020	static void atfork_parent (void)
725	{	1021	{
726	#if !HAVE_READDIR_R	1022	#if !HAVE_READDIR_R
727	pthread_mutex_unlock (&readdirlock);	1023	UNLOCK (readdirlock);
728	#endif	1024	#endif
729	#if !HAVE_PREADWRITE	1025	#if !HAVE_PREADWRITE
730	pthread_mutex_unlock (&preadwritelock);	1026	UNLOCK (preadwritelock);
731	#endif	1027	#endif
732	pthread_mutex_unlock (&reslock);	1028	UNLOCK (reslock);
733	pthread_mutex_unlock (&reqlock);	1029	UNLOCK (reqlock);
		1030	UNLOCK (wrklock);
734	}	1031	}
735		1032
736	static void atfork_child (void)	1033	static void atfork_child (void)
737	{	1034	{
738	aio_req prv;	1035	aio_req prv;
739		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
740	started = 0;	1054	started = 0;
741		1055	nreqs = 0;
742	while (reqs)
743	{
744	prv = reqs;
745	reqs = prv->next;
746	free_req (prv);
747	}
748
749	reqs = reqe = 0;
750
751	while (ress)
752	{
753	prv = ress;
754	ress = prv->next;
755	free_req (prv);
756	}
757
758	ress = rese = 0;
759		1056
760	close (respipe [0]);	1057	close (respipe [0]);
761	close (respipe [1]);	1058	close (respipe [1]);
762	create_pipe ();	1059	create_pipe ();
763		1060
764	atfork_parent ();	1061	atfork_parent ();
765	}	1062	}
766		1063
767	#define dREQ \	1064	#define dREQ \
768	aio_req req; \	1065	aio_req req; \
		1066	int req_pri = next_pri; \
		1067	next_pri = DEFAULT_PRI + PRI_BIAS; \
769	\	1068	\
770	if (SvOK (callback) && !SvROK (callback)) \	1069	if (SvOK (callback) && !SvROK (callback)) \
771	croak ("clalback must be undef or of reference type"); \	1070	croak ("callback must be undef or of reference type"); \
772	\	1071	\
773	Newz (0, req, 1, aio_cb); \	1072	Newz (0, req, 1, aio_cb); \
774	if (!req) \	1073	if (!req) \
775	croak ("out of memory during aio_req allocation"); \	1074	croak ("out of memory during aio_req allocation"); \
776	\	1075	\
777	req->callback = newSVsv (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));
778		1084
779	MODULE = IO::AIO PACKAGE = IO::AIO	1085	MODULE = IO::AIO PACKAGE = IO::AIO
780		1086
781	PROTOTYPES: ENABLE	1087	PROTOTYPES: ENABLE
782		1088
783	BOOT:	1089	BOOT:
784	{	1090	{
		1091	HV *stash = gv_stashpv ("IO::AIO", 1);
		1092	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1093	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1094	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1095
785	create_pipe ();	1096	create_pipe ();
786	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
787	}	1098	}
788		1099
789	void	1100	void
790	min_parallel(nthreads)	1101	min_parallel (nthreads)
791	int nthreads	1102	int nthreads
792	PROTOTYPE: $	1103	PROTOTYPE: $
793		1104
794	void	1105	void
795	max_parallel(nthreads)	1106	max_parallel (nthreads)
796	int nthreads	1107	int nthreads
797	PROTOTYPE: $	1108	PROTOTYPE: $
798		1109
799	int
800	max_outstanding(nreqs)
801	int nreqs
802	PROTOTYPE: $
803	CODE:
804	RETVAL = max_outstanding;
805	max_outstanding = nreqs;
806
807	void	1110	void
808	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
809	SV * pathname	1112	SV * pathname
810	int flags	1113	int flags
811	int mode	1114	int mode
812	SV * callback	1115	SV * callback
813	PROTOTYPE: $$$;$	1116	PROTOTYPE: $$$;$
814	CODE:	1117	PPCODE:
815	{	1118	{
816	dREQ;	1119	dREQ;
817		1120
818	req->type = REQ_OPEN;	1121	req->type = REQ_OPEN;
819	req->data = newSVsv (pathname);	1122	req->data = newSVsv (pathname);
820	req->dataptr = SvPVbyte_nolen (req->data);	1123	req->dataptr = SvPVbyte_nolen (req->data);
821	req->fd = flags;	1124	req->fd = flags;
822	req->mode = mode;	1125	req->mode = mode;
823		1126
824	send_req (req);	1127	REQ_SEND;
825	}	1128	}
826		1129
827	void	1130	void
828	aio_close(fh,callback=&PL_sv_undef)	1131	aio_close (fh,callback=&PL_sv_undef)
829	SV * fh	1132	SV * fh
830	SV * callback	1133	SV * callback
831	PROTOTYPE: $;$	1134	PROTOTYPE: $;$
832	ALIAS:	1135	ALIAS:
833	aio_close = REQ_CLOSE	1136	aio_close = REQ_CLOSE
834	aio_fsync = REQ_FSYNC	1137	aio_fsync = REQ_FSYNC
835	aio_fdatasync = REQ_FDATASYNC	1138	aio_fdatasync = REQ_FDATASYNC
836	CODE:	1139	PPCODE:
837	{	1140	{
838	dREQ;	1141	dREQ;
839		1142
840	req->type = ix;	1143	req->type = ix;
841	req->fh = newSVsv (fh);	1144	req->fh = newSVsv (fh);
842	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
843		1146
844	send_req (req);	1147	REQ_SEND (req);
845	}	1148	}
846		1149
847	void	1150	void
848	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1151	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
849	SV * fh	1152	SV * fh
850	UV offset	1153	UV offset
851	UV length	1154	UV length
852	SV * data	1155	SV * data
853	UV dataoffset	1156	UV dataoffset
854	SV * callback	1157	SV * callback
855	ALIAS:	1158	ALIAS:
856	aio_read = REQ_READ	1159	aio_read = REQ_READ
857	aio_write = REQ_WRITE	1160	aio_write = REQ_WRITE
858	PROTOTYPE: $$$$$;$	1161	PROTOTYPE: $$$$$;$
859	CODE:	1162	PPCODE:
860	{	1163	{
861	aio_req req;	1164	aio_req req;
862	STRLEN svlen;	1165	STRLEN svlen;
863	char *svptr = SvPVbyte (data, svlen);	1166	char *svptr = SvPVbyte (data, svlen);
864		1167
…		…
902	{	1205	{
903	SvREADONLY_on (data);	1206	SvREADONLY_on (data);
904	req->data2ptr = (void *)data;	1207	req->data2ptr = (void *)data;
905	}	1208	}
906		1209
907	send_req (req);	1210	REQ_SEND;
908	}	1211	}
909	}	1212	}
910		1213
911	void	1214	void
912	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1215	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
913	SV * out_fh	1216	SV * out_fh
914	SV * in_fh	1217	SV * in_fh
915	UV in_offset	1218	UV in_offset
916	UV length	1219	UV length
917	SV * callback	1220	SV * callback
918	PROTOTYPE: $$$$;$	1221	PROTOTYPE: $$$$;$
919	CODE:	1222	PPCODE:
920	{	1223	{
921	dREQ;	1224	dREQ;
922		1225
923	req->type = REQ_SENDFILE;	1226	req->type = REQ_SENDFILE;
924	req->fh = newSVsv (out_fh);	1227	req->fh = newSVsv (out_fh);
…		…
926	req->fh2 = newSVsv (in_fh);	1229	req->fh2 = newSVsv (in_fh);
927	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
928	req->offset = in_offset;	1231	req->offset = in_offset;
929	req->length = length;	1232	req->length = length;
930		1233
931	send_req (req);	1234	REQ_SEND;
932	}	1235	}
933		1236
934	void	1237	void
935	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
936	SV * fh	1239	SV * fh
937	UV offset	1240	UV offset
938	IV length	1241	IV length
939	SV * callback	1242	SV * callback
940	PROTOTYPE: $$$;$	1243	PROTOTYPE: $$$;$
941	CODE:	1244	PPCODE:
942	{	1245	{
943	dREQ;	1246	dREQ;
944		1247
945	req->type = REQ_READAHEAD;	1248	req->type = REQ_READAHEAD;
946	req->fh = newSVsv (fh);	1249	req->fh = newSVsv (fh);
947	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
948	req->offset = offset;	1251	req->offset = offset;
949	req->length = length;	1252	req->length = length;
950		1253
951	send_req (req);	1254	REQ_SEND;
952	}	1255	}
953		1256
954	void	1257	void
955	aio_stat(fh_or_path,callback=&PL_sv_undef)	1258	aio_stat (fh_or_path,callback=&PL_sv_undef)
956	SV * fh_or_path	1259	SV * fh_or_path
957	SV * callback	1260	SV * callback
958	ALIAS:	1261	ALIAS:
959	aio_stat = REQ_STAT	1262	aio_stat = REQ_STAT
960	aio_lstat = REQ_LSTAT	1263	aio_lstat = REQ_LSTAT
961	CODE:	1264	PPCODE:
962	{	1265	{
963	dREQ;	1266	dREQ;
964		1267
965	New (0, req->statdata, 1, Stat_t);	1268	New (0, req->statdata, 1, Stat_t);
966	if (!req->statdata)	1269	if (!req->statdata)
967	{	1270	{
968	free_req (req);	1271	req_free (req);
969	croak ("out of memory during aio_req->statdata allocation");	1272	croak ("out of memory during aio_req->statdata allocation");
970	}	1273	}
971		1274
972	if (SvPOK (fh_or_path))	1275	if (SvPOK (fh_or_path))
973	{	1276	{
…		…
980	req->type = REQ_FSTAT;	1283	req->type = REQ_FSTAT;
981	req->fh = newSVsv (fh_or_path);	1284	req->fh = newSVsv (fh_or_path);
982	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
983	}	1286	}
984		1287
985	send_req (req);	1288	REQ_SEND;
986	}	1289	}
987		1290
988	void	1291	void
989	aio_unlink(pathname,callback=&PL_sv_undef)	1292	aio_unlink (pathname,callback=&PL_sv_undef)
990	SV * pathname	1293	SV * pathname
991	SV * callback	1294	SV * callback
992	ALIAS:	1295	ALIAS:
993	aio_unlink = REQ_UNLINK	1296	aio_unlink = REQ_UNLINK
994	aio_rmdir = REQ_RMDIR	1297	aio_rmdir = REQ_RMDIR
		1298	aio_readdir = REQ_READDIR
995	CODE:	1299	PPCODE:
996	{	1300	{
997	dREQ;	1301	dREQ;
998		1302
999	req->type = ix;	1303	req->type = ix;
1000	req->data = newSVsv (pathname);	1304	req->data = newSVsv (pathname);
1001	req->dataptr = SvPVbyte_nolen (req->data);	1305	req->dataptr = SvPVbyte_nolen (req->data);
1002		1306
1003	send_req (req);	1307	REQ_SEND;
1004	}	1308	}
1005		1309
1006	void	1310	void
1007	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)
1008	SV * oldpath	1312	SV * oldpath
1009	SV * newpath	1313	SV * newpath
1010	SV * callback	1314	SV * callback
		1315	ALIAS:
		1316	aio_link = REQ_LINK
		1317	aio_symlink = REQ_SYMLINK
		1318	aio_rename = REQ_RENAME
1011	CODE:	1319	PPCODE:
1012	{	1320	{
1013	dREQ;	1321	dREQ;
1014		1322
1015	req->type = REQ_SYMLINK;	1323	req->type = ix;
1016	req->fh = newSVsv (oldpath);	1324	req->fh = newSVsv (oldpath);
1017	req->data2ptr = SvPVbyte_nolen (req->fh);	1325	req->data2ptr = SvPVbyte_nolen (req->fh);
1018	req->data = newSVsv (newpath);	1326	req->data = newSVsv (newpath);
1019	req->dataptr = SvPVbyte_nolen (req->data);	1327	req->dataptr = SvPVbyte_nolen (req->data);
1020		1328
1021	send_req (req);	1329	REQ_SEND;
1022	}	1330	}
1023		1331
1024	void	1332	void
1025	aio_readdir(pathname,callback=&PL_sv_undef)	1333	aio_busy (delay,callback=&PL_sv_undef)
1026	SV * pathname	1334	double delay
1027	SV * callback	1335	SV * callback
1028	CODE:	1336	PPCODE:
1029	{	1337	{
1030	dREQ;	1338	dREQ;
1031		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
1032	req->type = REQ_READDIR;	1355	req->type = REQ_GROUP;
1033	req->data = newSVsv (pathname);	1356	req_send (req);
1034	req->dataptr = SvPVbyte_nolen (req->data);
1035
1036	send_req (req);
1037	}
1038		1357
		1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1359	}
		1360
1039	void	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
1040	flush()	1389	flush ()
1041	PROTOTYPE:	1390	PROTOTYPE:
1042	CODE:	1391	CODE:
1043	while (nreqs)	1392	while (nreqs)
1044	{	1393	{
1045	poll_wait ();	1394	poll_wait ();
…		…
1085	CODE:	1434	CODE:
1086	RETVAL = nreqs;	1435	RETVAL = nreqs;
1087	OUTPUT:	1436	OUTPUT:
1088	RETVAL	1437	RETVAL
1089		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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