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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.34 by root, Tue Aug 23 00:03:14 2005 UTC vs.
Revision 1.74 by root, Wed Oct 25 17:57:30 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux
		5	# define _GNU_SOURCE
		6	#endif
		7
1	#define _REENTRANT 1	8	#define _REENTRANT 1
		9
2	#include <errno.h>	10	#include <errno.h>
3		11
4	#include "EXTERN.h"	12	#include "EXTERN.h"
5	#include "perl.h"	13	#include "perl.h"
6	#include "XSUB.h"	14	#include "XSUB.h"
7		15
8	#include "autoconf/config.h"	16	#include "autoconf/config.h"
9		17
10	#include <pthread.h>	18	#include <pthread.h>
11		19
		20	#include <stddef.h>
		21	#include <errno.h>
		22	#include <sys/time.h>
		23	#include <sys/select.h>
12	#include <sys/types.h>	24	#include <sys/types.h>
13	#include <sys/stat.h>	25	#include <sys/stat.h>
14		26	#include <limits.h>
15	#include <unistd.h>	27	#include <unistd.h>
16	#include <fcntl.h>	28	#include <fcntl.h>
17	#include <signal.h>	29	#include <signal.h>
18	#include <sched.h>	30	#include <sched.h>
19		31
…		…
23	# elif __freebsd	35	# elif __freebsd
24	# include <sys/socket.h>	36	# include <sys/socket.h>
25	# include <sys/uio.h>	37	# include <sys/uio.h>
26	# elif __hpux	38	# elif __hpux
27	# include <sys/socket.h>	39	# include <sys/socket.h>
		40	# elif __solaris /* not yet */
		41	# include <sys/sendfile.h>
28	# else	42	# else
29	# error sendfile support requested but not available	43	# error sendfile support requested but not available
30	# endif	44	# endif
31	#endif	45	#endif
32		46
		47	/* used for struct dirent, AIX doesn't provide it */
		48	#ifndef NAME_MAX
		49	# define NAME_MAX 4096
		50	#endif
		51
33	#if __ia64	52	#if __ia64
34	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
35	#else	56	#else
36	# define STACKSIZE 4096	57	# define STACKSIZE 16384
37	#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;
38		70
39	enum {	71	enum {
40	REQ_QUIT,	72	REQ_QUIT,
41	REQ_OPEN, REQ_CLOSE,	73	REQ_OPEN, REQ_CLOSE,
42	REQ_READ, REQ_WRITE, REQ_READAHEAD,	74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
43	REQ_SENDFILE,	75	REQ_SENDFILE,
44	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
45	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
46	REQ_UNLINK, REQ_RMDIR,	78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
47	REQ_SYMLINK,	79	REQ_READDIR,
		80	REQ_LINK, REQ_SYMLINK,
		81	REQ_GROUP, REQ_NOP,
		82	REQ_BUSY,
48	};	83	};
49		84
		85	#define AIO_REQ_KLASS "IO::AIO::REQ"
		86	#define AIO_GRP_KLASS "IO::AIO::GRP"
		87
50	typedef struct aio_cb {	88	typedef struct aio_cb
		89	{
51	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
52		91
53	int type;	92	SV *data, *callback;
54		93	SV *fh, *fh2;
55	int fd, fd2;	94	void *dataptr, *data2ptr;
		95	Stat_t *statdata;
56	off_t offset;	96	off_t offset;
57	size_t length;	97	size_t length;
58	ssize_t result;	98	ssize_t result;
		99
		100	STRLEN dataoffset;
		101	int type;
		102	int fd, fd2;
		103	int errorno;
59	mode_t mode; /* open */	104	mode_t mode; /* open */
60	int errorno;
61	SV *data, *callback;
62	SV *fh, *fh2;
63	void *dataptr, *data2ptr;
64	STRLEN dataoffset;
65		105
66	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;
67	} aio_cb;	111	} aio_cb;
68		112
		113	enum {
		114	FLAG_CANCELLED = 0x01,
		115	};
		116
69	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;
70		130
71	static int started, wanted;	131	static int started, wanted;
72	static volatile int nreqs;	132	static volatile int nreqs;
73	static int max_outstanding = 1<<30;
74	static int respipe [2];	133	static int respipe [2];
75		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
76	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
77	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
78	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
79		187
80	static volatile aio_req reqs, reqe; /* queue start, queue end */	188	/*
81	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;
82		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);
83	static void free_req (aio_req req)	244	static void req_free (aio_req req);
84	{	245	static void req_cancel (aio_req req);
85	if (req->data)
86	SvREFCNT_dec (req->data);
87		246
		247	/* must be called at most once */
		248	static SV *req_sv (aio_req req, const char *klass)
		249	{
88	if (req->fh)	250	if (!req->self)
89	SvREFCNT_dec (req->fh);	251	{
		252	req->self = (SV *)newHV ();
		253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		254	}
90		255
91	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	{
92	SvREFCNT_dec (req->fh2);	295	SvREFCNT_dec (grp->fh2);
93		296	grp->fh2 = 0;
94	if (req->statdata)	297	break;
95	Safefree (req->statdata);	298	}
96
97	if (req->callback)
98	SvREFCNT_dec (req->callback);
99
100	Safefree (req);
101	}
102
103	static void
104	poll_wait ()
105	{
106	if (nreqs && !ress)
107	{	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	{
108	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
109	FD_ZERO(&rfd);	335	FD_ZERO(&rfd);
110	FD_SET(respipe [0], &rfd);	336	FD_SET(respipe [0], &rfd);
111		337
112	select (respipe [0] + 1, &rfd, 0, 0, 0);	338	select (respipe [0] + 1, &rfd, 0, 0, 0);
113	}	339	}
114	}	340	}
115		341
116	static int	342	static void req_invoke (aio_req req)
117	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 ()
118	{	496	{
119	dSP;	497	dSP;
120	int count = 0;	498	int count = 0;
121	int do_croak = 0;	499	int do_croak = 0;
122	aio_req req;	500	aio_req req;
123		501
124	for (;;)	502	for (;;)
125	{	503	{
126	pthread_mutex_lock (&reslock);	504	LOCK (reslock);
127	req = ress;	505	req = reqq_shift (&res_queue);
128		506
129	if (req)	507	if (req)
130	{	508	{
131	ress = req->next;
132
133	if (!ress)	509	if (!res_queue.size)
134	{	510	{
135	/* read any signals sent by the worker threads */	511	/* read any signals sent by the worker threads */
136	char buf [32];	512	char buf [32];
137	while (read (respipe [0], buf, 32) == 32)	513	while (read (respipe [0], buf, 32) == 32)
138	;	514	;
139
140	rese = 0;
141	}	515	}
142	}	516	}
143		517
144	pthread_mutex_unlock (&reslock);	518	UNLOCK (reslock);
145		519
146	if (!req)	520	if (!req)
147	break;	521	break;
148		522
149	nreqs--;	523	--nreqs;
150		524
151	if (req->type == REQ_QUIT)	525	if (req->type == REQ_QUIT)
152	started--;	526	started--;
		527	else if (req->type == REQ_GROUP && req->length)
		528	{
		529	req->fd = 1; /* mark request as delayed */
		530	continue;
		531	}
153	else	532	else
154	{	533	{
155	int errorno = errno;
156	errno = req->errorno;
157
158	if (req->type == REQ_READ)	534	if (req->type == REQ_READ)
159	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));
160		536
161	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
162	SvREADONLY_off (req->data);	538	SvREADONLY_off (req->data);
…		…
166	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
167	PL_laststatval = req->result;	543	PL_laststatval = req->result;
168	PL_statcache = *(req->statdata);	544	PL_statcache = *(req->statdata);
169	}	545	}
170		546
171	ENTER;	547	req_invoke (req);
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (newSViv (req->result)));
174		548
175	if (req->type == REQ_OPEN)
176	{
177	/* convert fd to fh */
178	SV *fh;
179
180	PUTBACK;
181	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
182	SPAGAIN;
183
184	fh = SvREFCNT_inc (POPs);
185
186	PUSHMARK (SP);
187	XPUSHs (sv_2mortal (fh));
188	}
189
190	if (SvOK (req->callback))
191	{
192	PUTBACK;
193	call_sv (req->callback, G_VOID | G_EVAL);
194	SPAGAIN;
195
196	if (SvTRUE (ERRSV))
197	{
198	free_req (req);
199	croak (0);
200	}
201	}
202
203	LEAVE;
204
205	errno = errorno;
206	count++;	549	count++;
207	}	550	}
208		551
209	free_req (req);	552	req_free (req);
210	}	553	}
211		554
212	return count;	555	return count;
213	}	556	}
214		557
215	static void *aio_proc(void *arg);	558	static void *aio_proc(void *arg);
216		559
217	static void
218	start_thread (void)	560	static void start_thread (void)
219	{	561	{
220	sigset_t fullsigset, oldsigset;	562	sigset_t fullsigset, oldsigset;
221	pthread_t tid;
222	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");
223		569
224	pthread_attr_init (&attr);	570	pthread_attr_init (&attr);
225	pthread_attr_setstacksize (&attr, STACKSIZE);	571	pthread_attr_setstacksize (&attr, STACKSIZE);
226	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
227		573
228	sigfillset (&fullsigset);	574	sigfillset (&fullsigset);
		575
		576	LOCK (wrklock);
229	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
230		578
231	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;
232	started++;	585	started++;
		586	}
		587	else
		588	free (wrk);
233		589
234	sigprocmask (SIG_SETMASK, &oldsigset, 0);	590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		591	UNLOCK (wrklock);
235	}	592	}
236		593
237	static void	594	static void req_send (aio_req req)
238	send_req (aio_req req)
239	{	595	{
240	while (started < wanted && nreqs >= started)	596	while (started < wanted && nreqs >= started)
241	start_thread ();	597	start_thread ();
242		598
243	nreqs++;	599	++nreqs;
244		600
245	pthread_mutex_lock (&reqlock);	601	LOCK (reqlock);
246		602	reqq_push (&req_queue, req);
247	req->next = 0;
248
249	if (reqe)
250	{
251	reqe->next = req;
252	reqe = req;
253	}
254	else
255	reqe = reqs = req;
256
257	pthread_cond_signal (&reqwait);	603	pthread_cond_signal (&reqwait);
258	pthread_mutex_unlock (&reqlock);	604	UNLOCK (reqlock);
259
260	if (nreqs > max_outstanding)
261	for (;;)
262	{
263	poll_cb ();
264
265	if (nreqs <= max_outstanding)
266	break;
267
268	poll_wait ();
269	}
270	}	605	}
271		606
272	static void	607	static void end_thread (void)
273	end_thread (void)
274	{	608	{
275	aio_req req;	609	aio_req req;
		610
276	Newz (0, req, 1, aio_cb);	611	Newz (0, req, 1, aio_cb);
		612
277	req->type = REQ_QUIT;	613	req->type = REQ_QUIT;
		614	req->pri = PRI_MAX + PRI_BIAS;
278		615
279	send_req (req);	616	req_send (req);
280	}	617	}
281		618
282	static void min_parallel (int nthreads)	619	static void min_parallel (int nthreads)
283	{	620	{
284	if (wanted < nthreads)	621	if (wanted < nthreads)
…		…
313	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
314	croak ("cannot set result pipe to nonblocking mode");	651	croak ("cannot set result pipe to nonblocking mode");
315		652
316	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
317	croak ("cannot set result pipe to nonblocking mode");	654	croak ("cannot set result pipe to nonblocking mode");
318	}
319
320	static void atfork_prepare (void)
321	{
322	pthread_mutex_lock (&reqlock);
323	pthread_mutex_lock (&reslock);
324	}
325
326	static void atfork_parent (void)
327	{
328	pthread_mutex_unlock (&reslock);
329	pthread_mutex_unlock (&reqlock);
330	}
331
332	static void atfork_child (void)
333	{
334	aio_req prv;
335
336	started = 0;
337
338	while (reqs)
339	{
340	prv = reqs;
341	reqs = prv->next;
342	free_req (prv);
343	}
344
345	reqs = reqe = 0;
346
347	while (ress)
348	{
349	prv = ress;
350	ress = prv->next;
351	free_req (prv);
352	}
353
354	ress = rese = 0;
355
356	close (respipe [0]);
357	close (respipe [1]);
358	create_pipe ();
359
360	atfork_parent ();
361	}	655	}
362		656
363	/*****************************************************************************/	657	/*****************************************************************************/
364	/* work around various missing functions */	658	/* work around various missing functions */
365		659
…		…
370	/*	664	/*
371	* make our pread/pwrite safe against themselves, but not against	665	* make our pread/pwrite safe against themselves, but not against
372	* 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,
373	* but that's your problem, not mine.	667	* but that's your problem, not mine.
374	*/	668	*/
375	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
376		670
377	static ssize_t	671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
378	pread (int fd, void *buf, size_t count, off_t offset)
379	{	672	{
380	ssize_t res;	673	ssize_t res;
381	off_t ooffset;	674	off_t ooffset;
382		675
383	pthread_mutex_lock (&iolock);	676	LOCK (preadwritelock);
384	ooffset = lseek (fd, 0, SEEK_CUR);	677	ooffset = lseek (fd, 0, SEEK_CUR);
385	lseek (fd, offset, SEEK_SET);	678	lseek (fd, offset, SEEK_SET);
386	res = read (fd, buf, count);	679	res = read (fd, buf, count);
387	lseek (fd, ooffset, SEEK_SET);	680	lseek (fd, ooffset, SEEK_SET);
388	pthread_mutex_unlock (&iolock);	681	UNLOCK (preadwritelock);
389		682
390	return res;	683	return res;
391	}	684	}
392		685
393	static ssize_t
394	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)
395	{	687	{
396	ssize_t res;	688	ssize_t res;
397	off_t ooffset;	689	off_t ooffset;
398		690
399	pthread_mutex_lock (&iolock);	691	LOCK (preadwritelock);
400	ooffset = lseek (fd, 0, SEEK_CUR);	692	ooffset = lseek (fd, 0, SEEK_CUR);
401	lseek (fd, offset, SEEK_SET);	693	lseek (fd, offset, SEEK_SET);
402	res = write (fd, buf, count);	694	res = write (fd, buf, count);
403	lseek (fd, offset, SEEK_SET);	695	lseek (fd, offset, SEEK_SET);
404	pthread_mutex_unlock (&iolock);	696	UNLOCK (preadwritelock);
405		697
406	return res;	698	return res;
407	}	699	}
408	#endif	700	#endif
409		701
…		…
412	#endif	704	#endif
413		705
414	#if !HAVE_READAHEAD	706	#if !HAVE_READAHEAD
415	# define readahead aio_readahead	707	# define readahead aio_readahead
416		708
417	static char readahead_buf[4096];
418
419	static ssize_t
420	readahead (int fd, off_t offset, size_t count)	709	static ssize_t readahead (int fd, off_t offset, size_t count)
421	{	710	{
		711	dBUF;
		712
422	while (count > 0)	713	while (count > 0)
423	{	714	{
424	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
425		716
426	pread (fd, readahead_buf, len, offset);	717	pread (fd, aio_buf, len, offset);
427	offset += len;	718	offset += len;
428	count -= len;	719	count -= len;
429	}	720	}
430		721
431	errno = 0;	722	errno = 0;
432	}	723	}
433	#endif	724	#endif
434		725
		726	#if !HAVE_READDIR_R
		727	# define readdir_r aio_readdir_r
		728
		729	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		730
		731	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		732	{
		733	struct dirent *e;
		734	int errorno;
		735
		736	LOCK (readdirlock);
		737
		738	e = readdir (dirp);
		739	errorno = errno;
		740
		741	if (e)
		742	{
		743	*res = ent;
		744	strcpy (ent->d_name, e->d_name);
		745	}
		746	else
		747	*res = 0;
		748
		749	UNLOCK (readdirlock);
		750
		751	errno = errorno;
		752	return e ? 0 : -1;
		753	}
		754	#endif
		755
435	/* sendfile always needs emulation */	756	/* sendfile always needs emulation */
436	static ssize_t
437	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)
438	{	758	{
439	ssize_t res;	759	ssize_t res;
440		760
441	if (!count)	761	if (!count)
442	return 0;	762	return 0;
443		763
		764	#if HAVE_SENDFILE
444	#if __linux	765	# if __linux
445	res = sendfile (ofd, ifd, &offset, count);	766	res = sendfile (ofd, ifd, &offset, count);
446		767
447	#elif __freebsd	768	# elif __freebsd
448	/*	769	/*
449	* Of course, the freebsd sendfile is a dire hack with no thoughts	770	* Of course, the freebsd sendfile is a dire hack with no thoughts
450	* wasted on making it similar to other i/o functions.	771	* wasted on making it similar to other I/O functions.
451	*/	772	*/
452	{	773	{
453	off_t sbytes;	774	off_t sbytes;
454	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	775	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
455		776
456	if (!res && errno == EAGAIN)	777	if (res < 0 && sbytes)
457	/* maybe on others, too, as usual, the manpage leaves you guessing */	778	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
458	res = sbytes;	779	res = sbytes;
459	}	780	}
460		781
461	#elif __hpux	782	# elif __hpux
462	res = sendfile (ofd, ifd, offset, count, 0, 0);	783	res = sendfile (ofd, ifd, offset, count, 0, 0);
463		784
		785	# elif __solaris
		786	{
		787	struct sendfilevec vec;
		788	size_t sbytes;
		789
		790	vec.sfv_fd = ifd;
		791	vec.sfv_flag = 0;
		792	vec.sfv_off = offset;
		793	vec.sfv_len = count;
		794
		795	res = sendfilev (ofd, &vec, 1, &sbytes);
		796
		797	if (res < 0 && sbytes)
		798	res = sbytes;
		799	}
		800
		801	# endif
464	#else	802	#else
465	res = -1;	803	res = -1;
466	errno = ENOSYS;	804	errno = ENOSYS;
467	#endif	805	#endif
468		806
		807	if (res < 0
469	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))	808	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		809	#if __solaris
		810	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		811	#endif
		812	)
		813	)
470	{	814	{
471	/* emulate sendfile. this is a major pain in the ass */	815	/* emulate sendfile. this is a major pain in the ass */
472	char *buf = malloc (4096);	816	dBUF;
		817
473	res = 0;	818	res = 0;
474		819
475	for (;;)	820	while (count)
476	{	821	{
477	ssize_t cnt;	822	ssize_t cnt;
478		823
479	cnt = pread (ifd, buf, 4096, offset);	824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
480		825
481	if (cnt <= 0)	826	if (cnt <= 0)
482	{	827	{
483	if (cnt && !res) res = -1;	828	if (cnt && !res) res = -1;
484	break;	829	break;
485	}	830	}
486		831
487	cnt = write (ofd, buf, cnt);	832	cnt = write (ofd, aio_buf, cnt);
488		833
489	if (cnt <= 0)	834	if (cnt <= 0)
490	{	835	{
491	if (cnt && !res) res = -1;	836	if (cnt && !res) res = -1;
492	break;	837	break;
493	}	838	}
494		839
495	offset += cnt;	840	offset += cnt;
496	res += cnt;	841	res += cnt;
		842	count -= cnt;
497	}	843	}
498
499	{
500	int errorno = errno;
501	free (buf);
502	errno = errorno;
503	}
504	}	844	}
505		845
506	return res;	846	return res;
		847	}
		848
		849	/* read a full directory */
		850	static void scandir_ (aio_req req, worker *self)
		851	{
		852	DIR *dirp;
		853	union
		854	{
		855	struct dirent d;
		856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		857	} *u;
		858	struct dirent *entp;
		859	char *name, *names;
		860	int memlen = 4096;
		861	int memofs = 0;
		862	int res = 0;
		863	int errorno;
		864
		865	LOCK (wrklock);
		866	self->dirp = dirp = opendir (req->dataptr);
		867	self->dbuf = u = malloc (sizeof (*u));
		868	UNLOCK (wrklock);
		869
		870	req->data2ptr = names = malloc (memlen);
		871
		872	if (dirp && u && names)
		873	for (;;)
		874	{
		875	errno = 0;
		876	readdir_r (dirp, &u->d, &entp);
		877
		878	if (!entp)
		879	break;
		880
		881	name = entp->d_name;
		882
		883	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		884	{
		885	int len = strlen (name) + 1;
		886
		887	res++;
		888
		889	while (memofs + len > memlen)
		890	{
		891	memlen *= 2;
		892	LOCK (wrklock);
		893	req->data2ptr = names = realloc (names, memlen);
		894	UNLOCK (wrklock);
		895
		896	if (!names)
		897	break;
		898	}
		899
		900	memcpy (names + memofs, name, len);
		901	memofs += len;
		902	}
		903	}
		904
		905	if (errno)
		906	res = -1;
		907
		908	req->result = res;
507	}	909	}
508		910
509	/*****************************************************************************/	911	/*****************************************************************************/
510		912
511	static void *
512	aio_proc (void *thr_arg)	913	static void *aio_proc (void *thr_arg)
513	{	914	{
514	aio_req req;	915	aio_req req;
515	int type;	916	int type;
		917	worker *self = (worker *)thr_arg;
516		918
517	do	919	do
518	{	920	{
519	pthread_mutex_lock (&reqlock);	921	LOCK (reqlock);
520		922
521	for (;;)	923	for (;;)
522	{	924	{
523	req = reqs;	925	self->req = req = reqq_shift (&req_queue);
524
525	if (reqs)
526	{
527	reqs = reqs->next;
528	if (!reqs) reqe = 0;
529	}
530		926
531	if (req)	927	if (req)
532	break;	928	break;
533		929
534	pthread_cond_wait (&reqwait, &reqlock);	930	pthread_cond_wait (&reqwait, &reqlock);
535	}	931	}
536		932
537	pthread_mutex_unlock (&reqlock);	933	UNLOCK (reqlock);
538		934
539	errno = 0; /* strictly unnecessary */	935	errno = 0; /* strictly unnecessary */
		936	type = req->type; /* remember type for QUIT check */
540		937
541	type = req->type;	938	if (!(req->flags & FLAG_CANCELLED))
542
543	switch (type)	939	switch (type)
544	{	940	{
545	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;
546	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;
547		943
548	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;
549	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;
550		946
551	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
552	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
553	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
554		950
555	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;
556	case REQ_CLOSE: req->result = close (req->fd); break;	952	case REQ_CLOSE: req->result = close (req->fd); break;
557	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
558	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;
559	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
560		958
561	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
562	case REQ_FSYNC: req->result = fsync (req->fd); break;	960	case REQ_FSYNC: req->result = fsync (req->fd); break;
		961	case REQ_READDIR: scandir_ (req, self); break;
563		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:
564	case REQ_QUIT:	975	case REQ_QUIT:
565	break;	976	break;
566		977
567	default:	978	default:
568	req->result = ENOSYS;	979	req->result = ENOSYS;
569	break;	980	break;
570	}	981	}
571		982
572	req->errorno = errno;	983	req->errorno = errno;
573		984
574	pthread_mutex_lock (&reslock);	985	LOCK (reslock);
575		986
576	req->next = 0;	987	if (!reqq_push (&res_queue, req))
577
578	if (rese)
579	{
580	rese->next = req;
581	rese = req;
582	}
583	else
584	{
585	rese = ress = req;
586
587	/* write a dummy byte to the pipe so fh becomes ready */	988	/* write a dummy byte to the pipe so fh becomes ready */
588	write (respipe [1], &respipe, 1);	989	write (respipe [1], &respipe, 1);
589	}
590		990
591	pthread_mutex_unlock (&reslock);	991	self->req = 0;
		992	worker_clear (self);
		993
		994	UNLOCK (reslock);
592	}	995	}
593	while (type != REQ_QUIT);	996	while (type != REQ_QUIT);
594		997
		998	LOCK (wrklock);
		999	worker_free (self);
		1000	UNLOCK (wrklock);
		1001
595	return 0;	1002	return 0;
		1003	}
		1004
		1005	/*****************************************************************************/
		1006
		1007	static void atfork_prepare (void)
		1008	{
		1009	LOCK (wrklock);
		1010	LOCK (reqlock);
		1011	LOCK (reslock);
		1012	#if !HAVE_PREADWRITE
		1013	LOCK (preadwritelock);
		1014	#endif
		1015	#if !HAVE_READDIR_R
		1016	LOCK (readdirlock);
		1017	#endif
		1018	}
		1019
		1020	static void atfork_parent (void)
		1021	{
		1022	#if !HAVE_READDIR_R
		1023	UNLOCK (readdirlock);
		1024	#endif
		1025	#if !HAVE_PREADWRITE
		1026	UNLOCK (preadwritelock);
		1027	#endif
		1028	UNLOCK (reslock);
		1029	UNLOCK (reqlock);
		1030	UNLOCK (wrklock);
		1031	}
		1032
		1033	static void atfork_child (void)
		1034	{
		1035	aio_req prv;
		1036
		1037	while (prv = reqq_shift (&req_queue))
		1038	req_free (prv);
		1039
		1040	while (prv = reqq_shift (&res_queue))
		1041	req_free (prv);
		1042
		1043	while (wrk_first.next != &wrk_first)
		1044	{
		1045	worker *wrk = wrk_first.next;
		1046
		1047	if (wrk->req)
		1048	req_free (wrk->req);
		1049
		1050	worker_clear (wrk);
		1051	worker_free (wrk);
		1052	}
		1053
		1054	started = 0;
		1055	nreqs = 0;
		1056
		1057	close (respipe [0]);
		1058	close (respipe [1]);
		1059	create_pipe ();
		1060
		1061	atfork_parent ();
596	}	1062	}
597		1063
598	#define dREQ \	1064	#define dREQ \
599	aio_req req; \	1065	aio_req req; \
		1066	int req_pri = next_pri; \
		1067	next_pri = DEFAULT_PRI + PRI_BIAS; \
600	\	1068	\
601	if (SvOK (callback) && !SvROK (callback)) \	1069	if (SvOK (callback) && !SvROK (callback)) \
602	croak ("clalback must be undef or of reference type"); \	1070	croak ("callback must be undef or of reference type"); \
603	\	1071	\
604	Newz (0, req, 1, aio_cb); \	1072	Newz (0, req, 1, aio_cb); \
605	if (!req) \	1073	if (!req) \
606	croak ("out of memory during aio_req allocation"); \	1074	croak ("out of memory during aio_req allocation"); \
607	\	1075	\
608	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));
609		1084
610	MODULE = IO::AIO PACKAGE = IO::AIO	1085	MODULE = IO::AIO PACKAGE = IO::AIO
611		1086
612	PROTOTYPES: ENABLE	1087	PROTOTYPES: ENABLE
613		1088
614	BOOT:	1089	BOOT:
615	{	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
616	create_pipe ();	1096	create_pipe ();
617	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
618	}	1098	}
619		1099
620	void	1100	void
621	min_parallel(nthreads)	1101	min_parallel (nthreads)
622	int nthreads	1102	int nthreads
623	PROTOTYPE: $	1103	PROTOTYPE: $
624		1104
625	void	1105	void
626	max_parallel(nthreads)	1106	max_parallel (nthreads)
627	int nthreads	1107	int nthreads
628	PROTOTYPE: $	1108	PROTOTYPE: $
629		1109
630	int
631	max_outstanding(nreqs)
632	int nreqs
633	PROTOTYPE: $
634	CODE:
635	RETVAL = max_outstanding;
636	max_outstanding = nreqs;
637
638	void	1110	void
639	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
640	SV * pathname	1112	SV * pathname
641	int flags	1113	int flags
642	int mode	1114	int mode
643	SV * callback	1115	SV * callback
644	PROTOTYPE: $$$;$	1116	PROTOTYPE: $$$;$
645	CODE:	1117	PPCODE:
646	{	1118	{
647	dREQ;	1119	dREQ;
648		1120
649	req->type = REQ_OPEN;	1121	req->type = REQ_OPEN;
650	req->data = newSVsv (pathname);	1122	req->data = newSVsv (pathname);
651	req->dataptr = SvPVbyte_nolen (req->data);	1123	req->dataptr = SvPVbyte_nolen (req->data);
652	req->fd = flags;	1124	req->fd = flags;
653	req->mode = mode;	1125	req->mode = mode;
654		1126
655	send_req (req);	1127	REQ_SEND;
656	}	1128	}
657		1129
658	void	1130	void
659	aio_close(fh,callback=&PL_sv_undef)	1131	aio_close (fh,callback=&PL_sv_undef)
660	SV * fh	1132	SV * fh
661	SV * callback	1133	SV * callback
662	PROTOTYPE: $;$	1134	PROTOTYPE: $;$
663	ALIAS:	1135	ALIAS:
664	aio_close = REQ_CLOSE	1136	aio_close = REQ_CLOSE
665	aio_fsync = REQ_FSYNC	1137	aio_fsync = REQ_FSYNC
666	aio_fdatasync = REQ_FDATASYNC	1138	aio_fdatasync = REQ_FDATASYNC
667	CODE:	1139	PPCODE:
668	{	1140	{
669	dREQ;	1141	dREQ;
670		1142
671	req->type = ix;	1143	req->type = ix;
672	req->fh = newSVsv (fh);	1144	req->fh = newSVsv (fh);
673	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
674		1146
675	send_req (req);	1147	REQ_SEND (req);
676	}	1148	}
677		1149
678	void	1150	void
679	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1151	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
680	SV * fh	1152	SV * fh
681	UV offset	1153	UV offset
682	UV length	1154	UV length
683	SV * data	1155	SV * data
684	UV dataoffset	1156	UV dataoffset
685	SV * callback	1157	SV * callback
686	ALIAS:	1158	ALIAS:
687	aio_read = REQ_READ	1159	aio_read = REQ_READ
688	aio_write = REQ_WRITE	1160	aio_write = REQ_WRITE
689	PROTOTYPE: $$$$$;$	1161	PROTOTYPE: $$$$$;$
690	CODE:	1162	PPCODE:
691	{	1163	{
692	aio_req req;	1164	aio_req req;
693	STRLEN svlen;	1165	STRLEN svlen;
694	char *svptr = SvPVbyte (data, svlen);	1166	char *svptr = SvPVbyte (data, svlen);
695		1167
…		…
733	{	1205	{
734	SvREADONLY_on (data);	1206	SvREADONLY_on (data);
735	req->data2ptr = (void *)data;	1207	req->data2ptr = (void *)data;
736	}	1208	}
737		1209
738	send_req (req);	1210	REQ_SEND;
739	}	1211	}
740	}	1212	}
741		1213
742	void	1214	void
743	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1215	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
744	SV * out_fh	1216	SV * out_fh
745	SV * in_fh	1217	SV * in_fh
746	UV in_offset	1218	UV in_offset
747	UV length	1219	UV length
748	SV * callback	1220	SV * callback
749	PROTOTYPE: $$$$;$	1221	PROTOTYPE: $$$$;$
750	CODE:	1222	PPCODE:
751	{	1223	{
752	dREQ;	1224	dREQ;
753		1225
754	req->type = REQ_SENDFILE;	1226	req->type = REQ_SENDFILE;
755	req->fh = newSVsv (out_fh);	1227	req->fh = newSVsv (out_fh);
…		…
757	req->fh2 = newSVsv (in_fh);	1229	req->fh2 = newSVsv (in_fh);
758	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
759	req->offset = in_offset;	1231	req->offset = in_offset;
760	req->length = length;	1232	req->length = length;
761		1233
762	send_req (req);	1234	REQ_SEND;
763	}	1235	}
764		1236
765	void	1237	void
766	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
767	SV * fh	1239	SV * fh
768	UV offset	1240	UV offset
769	IV length	1241	IV length
770	SV * callback	1242	SV * callback
771	PROTOTYPE: $$$;$	1243	PROTOTYPE: $$$;$
772	CODE:	1244	PPCODE:
773	{	1245	{
774	dREQ;	1246	dREQ;
775		1247
776	req->type = REQ_READAHEAD;	1248	req->type = REQ_READAHEAD;
777	req->fh = newSVsv (fh);	1249	req->fh = newSVsv (fh);
778	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
779	req->offset = offset;	1251	req->offset = offset;
780	req->length = length;	1252	req->length = length;
781		1253
782	send_req (req);	1254	REQ_SEND;
783	}	1255	}
784		1256
785	void	1257	void
786	aio_stat(fh_or_path,callback=&PL_sv_undef)	1258	aio_stat (fh_or_path,callback=&PL_sv_undef)
787	SV * fh_or_path	1259	SV * fh_or_path
788	SV * callback	1260	SV * callback
789	ALIAS:	1261	ALIAS:
790	aio_stat = REQ_STAT	1262	aio_stat = REQ_STAT
791	aio_lstat = REQ_LSTAT	1263	aio_lstat = REQ_LSTAT
792	CODE:	1264	PPCODE:
793	{	1265	{
794	dREQ;	1266	dREQ;
795		1267
796	New (0, req->statdata, 1, Stat_t);	1268	New (0, req->statdata, 1, Stat_t);
797	if (!req->statdata)	1269	if (!req->statdata)
798	{	1270	{
799	free_req (req);	1271	req_free (req);
800	croak ("out of memory during aio_req->statdata allocation");	1272	croak ("out of memory during aio_req->statdata allocation");
801	}	1273	}
802		1274
803	if (SvPOK (fh_or_path))	1275	if (SvPOK (fh_or_path))
804	{	1276	{
…		…
811	req->type = REQ_FSTAT;	1283	req->type = REQ_FSTAT;
812	req->fh = newSVsv (fh_or_path);	1284	req->fh = newSVsv (fh_or_path);
813	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
814	}	1286	}
815		1287
816	send_req (req);	1288	REQ_SEND;
817	}	1289	}
818		1290
819	void	1291	void
820	aio_unlink(pathname,callback=&PL_sv_undef)	1292	aio_unlink (pathname,callback=&PL_sv_undef)
821	SV * pathname	1293	SV * pathname
822	SV * callback	1294	SV * callback
823	ALIAS:	1295	ALIAS:
824	aio_unlink = REQ_UNLINK	1296	aio_unlink = REQ_UNLINK
825	aio_rmdir = REQ_RMDIR	1297	aio_rmdir = REQ_RMDIR
		1298	aio_readdir = REQ_READDIR
826	CODE:	1299	PPCODE:
827	{	1300	{
828	dREQ;	1301	dREQ;
829		1302
830	req->type = ix;	1303	req->type = ix;
831	req->data = newSVsv (pathname);	1304	req->data = newSVsv (pathname);
832	req->dataptr = SvPVbyte_nolen (req->data);	1305	req->dataptr = SvPVbyte_nolen (req->data);
833		1306
834	send_req (req);	1307	REQ_SEND;
835	}	1308	}
836		1309
837	void	1310	void
838	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)
839	SV * oldpath	1312	SV * oldpath
840	SV * newpath	1313	SV * newpath
841	SV * callback	1314	SV * callback
		1315	ALIAS:
		1316	aio_link = REQ_LINK
		1317	aio_symlink = REQ_SYMLINK
		1318	aio_rename = REQ_RENAME
842	CODE:	1319	PPCODE:
843	{	1320	{
844	dREQ;	1321	dREQ;
845		1322
846	req->type = REQ_SYMLINK;	1323	req->type = ix;
847	req->fh = newSVsv (oldpath);	1324	req->fh = newSVsv (oldpath);
848	req->data2ptr = SvPVbyte_nolen (req->fh);	1325	req->data2ptr = SvPVbyte_nolen (req->fh);
849	req->data = newSVsv (newpath);	1326	req->data = newSVsv (newpath);
850	req->dataptr = SvPVbyte_nolen (req->data);	1327	req->dataptr = SvPVbyte_nolen (req->data);
851		1328
852	send_req (req);	1329	REQ_SEND;
853	}	1330	}
854		1331
855	void	1332	void
		1333	aio_busy (delay,callback=&PL_sv_undef)
		1334	double delay
		1335	SV * callback
		1336	PPCODE:
		1337	{
		1338	dREQ;
		1339
		1340	req->type = REQ_BUSY;
		1341	req->fd = delay < 0. ? 0 : delay;
		1342	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1343
		1344	REQ_SEND;
		1345	}
		1346
		1347	void
		1348	aio_group (callback=&PL_sv_undef)
		1349	SV * callback
		1350	PROTOTYPE: ;$
		1351	PPCODE:
		1352	{
		1353	dREQ;
		1354
		1355	req->type = REQ_GROUP;
		1356	req_send (req);
		1357
		1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1359	}
		1360
		1361	void
		1362	aio_nop (callback=&PL_sv_undef)
		1363	SV * callback
		1364	PPCODE:
		1365	{
		1366	dREQ;
		1367
		1368	req->type = REQ_NOP;
		1369
		1370	REQ_SEND;
		1371	}
		1372
		1373	void
		1374	aioreq_pri (int pri = DEFAULT_PRI)
		1375	CODE:
		1376	if (pri < PRI_MIN) pri = PRI_MIN;
		1377	if (pri > PRI_MAX) pri = PRI_MAX;
		1378	next_pri = pri + PRI_BIAS;
		1379
		1380	void
		1381	aioreq_nice (int nice = 0)
		1382	CODE:
		1383	nice = next_pri - nice;
		1384	if (nice < PRI_MIN) nice = PRI_MIN;
		1385	if (nice > PRI_MAX) nice = PRI_MAX;
		1386	next_pri = nice + PRI_BIAS;
		1387
		1388	void
856	flush()	1389	flush ()
857	PROTOTYPE:	1390	PROTOTYPE:
858	CODE:	1391	CODE:
859	while (nreqs)	1392	while (nreqs)
860	{	1393	{
861	poll_wait ();	1394	poll_wait ();
…		…
901	CODE:	1434	CODE:
902	RETVAL = nreqs;	1435	RETVAL = nreqs;
903	OUTPUT:	1436	OUTPUT:
904	RETVAL	1437	RETVAL
905		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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