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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.31 by root, Thu Aug 18 16:34:53 2005 UTC vs.
Revision 1.72 by root, Tue Oct 24 17:22:17 2006 UTC

		1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux
		5	# define _GNU_SOURCE
		6	#endif
		7
1	#define _REENTRANT 1	8	#define _REENTRANT 1
		9
2	#include <errno.h>	10	#include <errno.h>
3		11
4	#include "EXTERN.h"	12	#include "EXTERN.h"
5	#include "perl.h"	13	#include "perl.h"
6	#include "XSUB.h"	14	#include "XSUB.h"
7		15
8	#include "autoconf/config.h"	16	#include "autoconf/config.h"
9		17
		18	#include <pthread.h>
		19
		20	#include <stddef.h>
		21	#include <errno.h>
		22	#include <sys/time.h>
		23	#include <sys/select.h>
10	#include <sys/types.h>	24	#include <sys/types.h>
11	#include <sys/stat.h>	25	#include <sys/stat.h>
12		26	#include <limits.h>
13	#include <unistd.h>	27	#include <unistd.h>
14	#include <fcntl.h>	28	#include <fcntl.h>
15	#include <signal.h>	29	#include <signal.h>
16	#include <sched.h>	30	#include <sched.h>
17		31
18	#include <pthread.h>	32	#if HAVE_SENDFILE
		33	# if __linux
		34	# include <sys/sendfile.h>
		35	# elif __freebsd
		36	# include <sys/socket.h>
		37	# include <sys/uio.h>
		38	# elif __hpux
		39	# include <sys/socket.h>
		40	# elif __solaris /* not yet */
		41	# include <sys/sendfile.h>
		42	# else
		43	# error sendfile support requested but not available
		44	# endif
		45	#endif
19		46
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	47	/* used for struct dirent, AIX doesn't provide it */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	48	#ifndef NAME_MAX
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	49	# define NAME_MAX 4096
		50	#endif
23		51
24	#if __ia64	52	#if __ia64
25	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
26	#else	56	#else
27	# define STACKSIZE 4096	57	# define STACKSIZE 16384
28	#endif	58	#endif
		59
		60	/* buffer size for various temporary buffers */
		61	#define AIO_BUFSIZE 65536
		62
		63	#define dBUF \
		64	char *aio_buf; \
		65	LOCK (wrklock); \
		66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
		67	UNLOCK (wrklock); \
		68	if (!aio_buf) \
		69	return -1;
29		70
30	enum {	71	enum {
31	REQ_QUIT,	72	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	73	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		75	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	77	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,	78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
37	REQ_SYMLINK,	79	REQ_READDIR,
		80	REQ_LINK, REQ_SYMLINK,
		81	REQ_GROUP, REQ_NOP,
		82	REQ_BUSY,
38	};	83	};
39		84
		85	#define AIO_REQ_KLASS "IO::AIO::REQ"
		86	#define AIO_GRP_KLASS "IO::AIO::GRP"
		87
40	typedef struct aio_cb {	88	typedef struct aio_cb
		89	{
41	struct aio_cb *volatile next;	90	struct aio_cb *volatile next;
42		91
43	int type;	92	SV *data, *callback;
44		93	SV *fh, *fh2;
45	int fd;	94	void *dataptr, *data2ptr;
		95	Stat_t *statdata;
46	off_t offset;	96	off_t offset;
47	size_t length;	97	size_t length;
48	ssize_t result;	98	ssize_t result;
		99
		100	STRLEN dataoffset;
		101	int type;
		102	int fd, fd2;
		103	int errorno;
49	mode_t mode; /* open */	104	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54		105
55	Stat_t *statdata;	106	unsigned char flags;
		107	unsigned char pri;
		108
		109	SV *self; /* the perl counterpart of this request, if any */
		110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
56	} aio_cb;	111	} aio_cb;
57		112
		113	enum {
		114	FLAG_CANCELLED = 0x01,
		115	};
		116
58	typedef aio_cb *aio_req;	117	typedef aio_cb *aio_req;
		118	typedef aio_cb *aio_req_ornot;
		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;
59		130
60	static int started, wanted;	131	static int started, wanted;
61	static volatile int nreqs;	132	static volatile int nreqs;
62	static int max_outstanding = 1<<30;	133	static int max_outstanding = 1<<30;
63	static int respipe [2];	134	static int respipe [2];
64		135
		136	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		137	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		138	#else
		139	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		140	#endif
		141
		142	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
		143	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
		144
		145	/* worker threasd management */
		146	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
		147
		148	typedef struct worker {
		149	/* locked by wrklock */
		150	struct worker *prev, *next;
		151
		152	pthread_t tid;
		153
		154	/* locked by reslock, reqlock or wrklock */
		155	aio_req req; /* currently processed request */
		156	void *dbuf;
		157	DIR *dirp;
		158	} worker;
		159
		160	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
		161
		162	static void worker_clear (worker *wrk)
		163	{
		164	if (wrk->dirp)
		165	{
		166	closedir (wrk->dirp);
		167	wrk->dirp = 0;
		168	}
		169
		170	if (wrk->dbuf)
		171	{
		172	free (wrk->dbuf);
		173	wrk->dbuf = 0;
		174	}
		175	}
		176
		177	static void worker_free (worker *wrk)
		178	{
		179	wrk->next->prev = wrk->prev;
		180	wrk->prev->next = wrk->next;
		181
		182	free (wrk);
		183	}
		184
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	185	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	186	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	187	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		188
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	189	/*
70	static volatile aio_req ress, rese; /* queue start, queue end */	190	* a somewhat faster data structure might be nice, but
		191	* with 8 priorities this actually needs <20 insns
		192	* per shift, the most expensive operation.
		193	*/
		194	typedef struct {
		195	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		196	int size;
		197	} reqq;
71		198
		199	static reqq req_queue;
		200	static reqq res_queue;
		201
		202	int reqq_push (reqq *q, aio_req req)
		203	{
		204	int pri = req->pri;
		205	req->next = 0;
		206
		207	if (q->qe[pri])
		208	{
		209	q->qe[pri]->next = req;
		210	q->qe[pri] = req;
		211	}
		212	else
		213	q->qe[pri] = q->qs[pri] = req;
		214
		215	return q->size++;
		216	}
		217
		218	aio_req reqq_shift (reqq *q)
		219	{
		220	int pri;
		221
		222	if (!q->size)
		223	return 0;
		224
		225	--q->size;
		226
		227	for (pri = NUM_PRI; pri--; )
		228	{
		229	aio_req req = q->qs[pri];
		230
		231	if (req)
		232	{
		233	if (!(q->qs[pri] = req->next))
		234	q->qe[pri] = 0;
		235
		236	return req;
		237	}
		238	}
		239
		240	abort ();
		241	}
		242
		243	static void req_invoke (aio_req req);
72	static void free_req (aio_req req)	244	static void req_free (aio_req req);
73	{	245	static void req_cancel (aio_req req);
74	if (req->data)
75	SvREFCNT_dec (req->data);
76		246
		247	/* must be called at most once */
		248	static SV *req_sv (aio_req req, const char *klass)
		249	{
77	if (req->fh)	250	if (!req->self)
		251	{
		252	req->self = (SV *)newHV ();
		253	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		254	}
		255
		256	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		257	}
		258
		259	static aio_req SvAIO_REQ (SV *sv)
		260	{
		261	MAGIC *mg;
		262
		263	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		264	croak ("object of class " AIO_REQ_KLASS " expected");
		265
		266	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		267
		268	return mg ? (aio_req)mg->mg_ptr : 0;
		269	}
		270
		271	static void aio_grp_feed (aio_req grp)
		272	{
		273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		274	{
		275	int old_len = grp->length;
		276
		277	if (grp->fh2 && SvOK (grp->fh2))
		278	{
		279	dSP;
		280
		281	ENTER;
		282	SAVETMPS;
		283	PUSHMARK (SP);
		284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		285	PUTBACK;
		286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		287	SPAGAIN;
		288	FREETMPS;
		289	LEAVE;
		290	}
		291
		292	/* stop if no progress has been made */
		293	if (old_len == grp->length)
		294	{
78	SvREFCNT_dec (req->fh);	295	SvREFCNT_dec (grp->fh2);
79		296	grp->fh2 = 0;
80	if (req->statdata)	297	break;
81	Safefree (req->statdata);	298	}
82
83	if (req->callback)
84	SvREFCNT_dec (req->callback);
85
86	Safefree (req);
87	}
88
89	static void
90	poll_wait ()
91	{
92	if (nreqs && !ress)
93	{	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	{
94	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
95	FD_ZERO(&rfd);	335	FD_ZERO(&rfd);
96	FD_SET(respipe [0], &rfd);	336	FD_SET(respipe [0], &rfd);
97		337
98	select (respipe [0] + 1, &rfd, 0, 0, 0);	338	select (respipe [0] + 1, &rfd, 0, 0, 0);
99	}	339	}
100	}	340	}
101		341
102	static int	342	static void req_invoke (aio_req req)
103	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 ()
104	{	496	{
105	dSP;	497	dSP;
106	int count = 0;	498	int count = 0;
107	int do_croak = 0;	499	int do_croak = 0;
108	aio_req req;	500	aio_req req;
109		501
110	for (;;)	502	for (;;)
111	{	503	{
112	pthread_mutex_lock (&reslock);	504	LOCK (reslock);
113	req = ress;	505	req = reqq_shift (&res_queue);
114		506
115	if (req)	507	if (req)
116	{	508	{
117	ress = req->next;
118
119	if (!ress)	509	if (!res_queue.size)
120	{	510	{
121	/* read any signals sent by the worker threads */	511	/* read any signals sent by the worker threads */
122	char buf [32];	512	char buf [32];
123	while (read (respipe [0], buf, 32) == 32)	513	while (read (respipe [0], buf, 32) == 32)
124	;	514	;
125
126	rese = 0;
127	}	515	}
128	}	516	}
129		517
130	pthread_mutex_unlock (&reslock);	518	UNLOCK (reslock);
131		519
132	if (!req)	520	if (!req)
133	break;	521	break;
134		522
135	nreqs--;	523	--nreqs;
136		524
137	if (req->type == REQ_QUIT)	525	if (req->type == REQ_QUIT)
138	started--;	526	started--;
		527	else if (req->type == REQ_GROUP && req->length)
		528	{
		529	req->fd = 1; /* mark request as delayed */
		530	continue;
		531	}
139	else	532	else
140	{	533	{
141	int errorno = errno;
142	errno = req->errorno;
143
144	if (req->type == REQ_READ)	534	if (req->type == REQ_READ)
145	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));
146		536
147	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
148	SvREADONLY_off (req->data);	538	SvREADONLY_off (req->data);
…		…
152	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
153	PL_laststatval = req->result;	543	PL_laststatval = req->result;
154	PL_statcache = *(req->statdata);	544	PL_statcache = *(req->statdata);
155	}	545	}
156		546
157	ENTER;	547	req_invoke (req);
158	PUSHMARK (SP);
159	XPUSHs (sv_2mortal (newSViv (req->result)));
160		548
161	if (req->type == REQ_OPEN)
162	{
163	/* convert fd to fh */
164	SV *fh;
165
166	PUTBACK;
167	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
168	SPAGAIN;
169
170	fh = SvREFCNT_inc (POPs);
171
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (fh));
174	}
175
176	if (SvOK (req->callback))
177	{
178	PUTBACK;
179	call_sv (req->callback, G_VOID | G_EVAL);
180	SPAGAIN;
181
182	if (SvTRUE (ERRSV))
183	{
184	free_req (req);
185	croak (0);
186	}
187	}
188
189	LEAVE;
190
191	errno = errorno;
192	count++;	549	count++;
193	}	550	}
194		551
195	free_req (req);	552	req_free (req);
196	}	553	}
197		554
198	return count;	555	return count;
199	}	556	}
200		557
201	static void *aio_proc(void *arg);	558	static void *aio_proc(void *arg);
202		559
203	static void
204	start_thread (void)	560	static void start_thread (void)
205	{	561	{
		562	worker *wrk = calloc (1, sizeof (worker));
		563
		564	if (!wrk)
		565	croak ("unable to allocate worker thread data");
		566
206	sigset_t fullsigset, oldsigset;	567	sigset_t fullsigset, oldsigset;
207	pthread_t tid;
208	pthread_attr_t attr;	568	pthread_attr_t attr;
209		569
210	pthread_attr_init (&attr);	570	pthread_attr_init (&attr);
211	pthread_attr_setstacksize (&attr, STACKSIZE);	571	pthread_attr_setstacksize (&attr, STACKSIZE);
212	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);	572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
213		573
214	sigfillset (&fullsigset);	574	sigfillset (&fullsigset);
		575
		576	LOCK (wrklock);
215	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);	577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
216		578
217	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;
218	started++;	585	started++;
		586	}
		587	else
		588	free (wrk);
219		589
220	sigprocmask (SIG_SETMASK, &oldsigset, 0);	590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		591	UNLOCK (wrklock);
221	}	592	}
222		593
223	static void	594	static void req_send (aio_req req)
224	send_req (aio_req req)
225	{	595	{
226	while (started < wanted && nreqs >= started)	596	while (started < wanted && nreqs >= started)
227	start_thread ();	597	start_thread ();
228		598
229	nreqs++;	599	++nreqs;
230		600
231	pthread_mutex_lock (&reqlock);	601	LOCK (reqlock);
232		602	reqq_push (&req_queue, req);
233	req->next = 0;
234
235	if (reqe)
236	{
237	reqe->next = req;
238	reqe = req;
239	}
240	else
241	reqe = reqs = req;
242
243	pthread_cond_signal (&reqwait);	603	pthread_cond_signal (&reqwait);
244	pthread_mutex_unlock (&reqlock);	604	UNLOCK (reqlock);
245		605
246	if (nreqs > max_outstanding)	606	if (nreqs > max_outstanding)
247	for (;;)	607	for (;;)
248	{	608	{
249	poll_cb ();	609	poll_cb ();
…		…
253		613
254	poll_wait ();	614	poll_wait ();
255	}	615	}
256	}	616	}
257		617
258	static void	618	static void end_thread (void)
259	end_thread (void)
260	{	619	{
261	aio_req req;	620	aio_req req;
		621
262	Newz (0, req, 1, aio_cb);	622	Newz (0, req, 1, aio_cb);
		623
263	req->type = REQ_QUIT;	624	req->type = REQ_QUIT;
		625	req->pri = PRI_MAX + PRI_BIAS;
264		626
265	send_req (req);	627	req_send (req);
266	}	628	}
267		629
268	static void min_parallel (int nthreads)	630	static void min_parallel (int nthreads)
269	{	631	{
270	if (wanted < nthreads)	632	if (wanted < nthreads)
…		…
299	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	661	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
300	croak ("cannot set result pipe to nonblocking mode");	662	croak ("cannot set result pipe to nonblocking mode");
301		663
302	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	664	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
303	croak ("cannot set result pipe to nonblocking mode");	665	croak ("cannot set result pipe to nonblocking mode");
304	}
305
306	static void atfork_prepare (void)
307	{
308	pthread_mutex_lock (&reqlock);
309	pthread_mutex_lock (&reslock);
310	}
311
312	static void atfork_parent (void)
313	{
314	pthread_mutex_unlock (&reslock);
315	pthread_mutex_unlock (&reqlock);
316	}
317
318	static void atfork_child (void)
319	{
320	aio_req prv;
321
322	started = 0;
323
324	while (reqs)
325	{
326	prv = reqs;
327	reqs = prv->next;
328	free_req (prv);
329	}
330
331	reqs = reqe = 0;
332
333	while (ress)
334	{
335	prv = ress;
336	ress = prv->next;
337	free_req (prv);
338	}
339
340	ress = rese = 0;
341
342	close (respipe [0]);
343	close (respipe [1]);
344	create_pipe ();
345
346	atfork_parent ();
347	}	666	}
348		667
349	/*****************************************************************************/	668	/*****************************************************************************/
350	/* work around various missing functions */	669	/* work around various missing functions */
351		670
…		…
356	/*	675	/*
357	* make our pread/pwrite safe against themselves, but not against	676	* make our pread/pwrite safe against themselves, but not against
358	* normal read/write by using a mutex. slows down execution a lot,	677	* normal read/write by using a mutex. slows down execution a lot,
359	* but that's your problem, not mine.	678	* but that's your problem, not mine.
360	*/	679	*/
361	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	680	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
362		681
363	static ssize_t	682	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
364	pread (int fd, void *buf, size_t count, off_t offset)
365	{	683	{
366	ssize_t res;	684	ssize_t res;
367	off_t ooffset;	685	off_t ooffset;
368		686
369	pthread_mutex_lock (&iolock);	687	LOCK (preadwritelock);
370	ooffset = lseek (fd, 0, SEEK_CUR);	688	ooffset = lseek (fd, 0, SEEK_CUR);
371	lseek (fd, offset, SEEK_SET);	689	lseek (fd, offset, SEEK_SET);
372	res = read (fd, buf, count);	690	res = read (fd, buf, count);
373	lseek (fd, ooffset, SEEK_SET);	691	lseek (fd, ooffset, SEEK_SET);
374	pthread_mutex_unlock (&iolock);	692	UNLOCK (preadwritelock);
375		693
376	return res;	694	return res;
377	}	695	}
378		696
379	static ssize_t
380	pwrite (int fd, void *buf, size_t count, off_t offset)	697	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
381	{	698	{
382	ssize_t res;	699	ssize_t res;
383	off_t ooffset;	700	off_t ooffset;
384		701
385	pthread_mutex_lock (&iolock);	702	LOCK (preadwritelock);
386	ooffset = lseek (fd, 0, SEEK_CUR);	703	ooffset = lseek (fd, 0, SEEK_CUR);
387	lseek (fd, offset, SEEK_SET);	704	lseek (fd, offset, SEEK_SET);
388	res = write (fd, buf, count);	705	res = write (fd, buf, count);
389	lseek (fd, offset, SEEK_SET);	706	lseek (fd, offset, SEEK_SET);
390	pthread_mutex_unlock (&iolock);	707	UNLOCK (preadwritelock);
391		708
392	return res;	709	return res;
393	}	710	}
394	#endif	711	#endif
395		712
…		…
398	#endif	715	#endif
399		716
400	#if !HAVE_READAHEAD	717	#if !HAVE_READAHEAD
401	# define readahead aio_readahead	718	# define readahead aio_readahead
402		719
403	static char readahead_buf[4096];
404
405	static ssize_t
406	readahead (int fd, off_t offset, size_t count)	720	static ssize_t readahead (int fd, off_t offset, size_t count)
407	{	721	{
		722	dBUF;
		723
408	while (count > 0)	724	while (count > 0)
409	{	725	{
410	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	726	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
411		727
412	pread (fd, readahead_buf, len, offset);	728	pread (fd, aio_buf, len, offset);
413	offset += len;	729	offset += len;
414	count -= len;	730	count -= len;
415	}	731	}
416		732
417	errno = 0;	733	errno = 0;
418	}	734	}
419	#endif	735	#endif
420		736
		737	#if !HAVE_READDIR_R
		738	# define readdir_r aio_readdir_r
		739
		740	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		741
		742	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		743	{
		744	struct dirent *e;
		745	int errorno;
		746
		747	LOCK (readdirlock);
		748
		749	e = readdir (dirp);
		750	errorno = errno;
		751
		752	if (e)
		753	{
		754	*res = ent;
		755	strcpy (ent->d_name, e->d_name);
		756	}
		757	else
		758	*res = 0;
		759
		760	UNLOCK (readdirlock);
		761
		762	errno = errorno;
		763	return e ? 0 : -1;
		764	}
		765	#endif
		766
		767	/* sendfile always needs emulation */
		768	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
		769	{
		770	ssize_t res;
		771
		772	if (!count)
		773	return 0;
		774
		775	#if HAVE_SENDFILE
		776	# if __linux
		777	res = sendfile (ofd, ifd, &offset, count);
		778
		779	# elif __freebsd
		780	/*
		781	* Of course, the freebsd sendfile is a dire hack with no thoughts
		782	* wasted on making it similar to other I/O functions.
		783	*/
		784	{
		785	off_t sbytes;
		786	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		787
		788	if (res < 0 && sbytes)
		789	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		790	res = sbytes;
		791	}
		792
		793	# elif __hpux
		794	res = sendfile (ofd, ifd, offset, count, 0, 0);
		795
		796	# elif __solaris
		797	{
		798	struct sendfilevec vec;
		799	size_t sbytes;
		800
		801	vec.sfv_fd = ifd;
		802	vec.sfv_flag = 0;
		803	vec.sfv_off = offset;
		804	vec.sfv_len = count;
		805
		806	res = sendfilev (ofd, &vec, 1, &sbytes);
		807
		808	if (res < 0 && sbytes)
		809	res = sbytes;
		810	}
		811
		812	# endif
		813	#else
		814	res = -1;
		815	errno = ENOSYS;
		816	#endif
		817
		818	if (res < 0
		819	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		820	#if __solaris
		821	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		822	#endif
		823	)
		824	)
		825	{
		826	/* emulate sendfile. this is a major pain in the ass */
		827	dBUF;
		828
		829	res = 0;
		830
		831	while (count)
		832	{
		833	ssize_t cnt;
		834
		835	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		836
		837	if (cnt <= 0)
		838	{
		839	if (cnt && !res) res = -1;
		840	break;
		841	}
		842
		843	cnt = write (ofd, aio_buf, cnt);
		844
		845	if (cnt <= 0)
		846	{
		847	if (cnt && !res) res = -1;
		848	break;
		849	}
		850
		851	offset += cnt;
		852	res += cnt;
		853	count -= cnt;
		854	}
		855	}
		856
		857	return res;
		858	}
		859
		860	/* read a full directory */
		861	static void scandir_ (aio_req req, worker *self)
		862	{
		863	DIR *dirp;
		864	union
		865	{
		866	struct dirent d;
		867	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		868	} *u;
		869	struct dirent *entp;
		870	char *name, *names;
		871	int memlen = 4096;
		872	int memofs = 0;
		873	int res = 0;
		874	int errorno;
		875
		876	LOCK (wrklock);
		877	self->dirp = dirp = opendir (req->dataptr);
		878	self->dbuf = u = malloc (sizeof (*u));
		879	UNLOCK (wrklock);
		880
		881	req->data2ptr = names = malloc (memlen);
		882
		883	if (dirp && u && names)
		884	for (;;)
		885	{
		886	errno = 0;
		887	readdir_r (dirp, &u->d, &entp);
		888
		889	if (!entp)
		890	break;
		891
		892	name = entp->d_name;
		893
		894	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		895	{
		896	int len = strlen (name) + 1;
		897
		898	res++;
		899
		900	while (memofs + len > memlen)
		901	{
		902	memlen *= 2;
		903	LOCK (wrklock);
		904	req->data2ptr = names = realloc (names, memlen);
		905	UNLOCK (wrklock);
		906
		907	if (!names)
		908	break;
		909	}
		910
		911	memcpy (names + memofs, name, len);
		912	memofs += len;
		913	}
		914	}
		915
		916	if (errno)
		917	res = -1;
		918
		919	req->result = res;
		920	}
		921
421	/*****************************************************************************/	922	/*****************************************************************************/
422		923
423	static void *
424	aio_proc (void *thr_arg)	924	static void *aio_proc (void *thr_arg)
425	{	925	{
426	aio_req req;	926	aio_req req;
427	int type;	927	int type;
		928	worker *self = (worker *)thr_arg;
428		929
429	do	930	do
430	{	931	{
431	pthread_mutex_lock (&reqlock);	932	LOCK (reqlock);
432		933
433	for (;;)	934	for (;;)
434	{	935	{
435	req = reqs;	936	self->req = req = reqq_shift (&req_queue);
436
437	if (reqs)
438	{
439	reqs = reqs->next;
440	if (!reqs) reqe = 0;
441	}
442		937
443	if (req)	938	if (req)
444	break;	939	break;
445		940
446	pthread_cond_wait (&reqwait, &reqlock);	941	pthread_cond_wait (&reqwait, &reqlock);
447	}	942	}
448		943
449	pthread_mutex_unlock (&reqlock);	944	UNLOCK (reqlock);
450		945
451	errno = 0; /* strictly unnecessary */	946	errno = 0; /* strictly unnecessary */
		947	type = req->type; /* remember type for QUIT check */
452		948
453	type = req->type;	949	if (!(req->flags & FLAG_CANCELLED))
454
455	switch (type)	950	switch (type)
456	{	951	{
457	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	952	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
458	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	953	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
459		954
460	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	955	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
		956	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
461		957
462	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	958	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
463	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	959	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
464	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	960	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
465		961
466	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	962	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
467	case REQ_CLOSE: req->result = close (req->fd); break;	963	case REQ_CLOSE: req->result = close (req->fd); break;
468	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	964	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
469	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	965	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		966	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		967	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
470	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	968	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
471		969
472	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	970	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
473	case REQ_FSYNC: req->result = fsync (req->fd); break;	971	case REQ_FSYNC: req->result = fsync (req->fd); break;
		972	case REQ_READDIR: scandir_ (req, self); break;
474		973
		974	case REQ_BUSY:
		975	{
		976	struct timeval tv;
		977
		978	tv.tv_sec = req->fd;
		979	tv.tv_usec = req->fd2;
		980
		981	req->result = select (0, 0, 0, 0, &tv);
		982	}
		983
		984	case REQ_GROUP:
		985	case REQ_NOP:
475	case REQ_QUIT:	986	case REQ_QUIT:
476	break;	987	break;
477		988
478	default:	989	default:
479	req->result = ENOSYS;	990	req->result = ENOSYS;
480	break;	991	break;
481	}	992	}
482		993
483	req->errorno = errno;	994	req->errorno = errno;
484		995
485	pthread_mutex_lock (&reslock);	996	LOCK (reslock);
486		997
487	req->next = 0;	998	if (!reqq_push (&res_queue, req))
488
489	if (rese)
490	{
491	rese->next = req;
492	rese = req;
493	}
494	else
495	{
496	rese = ress = req;
497
498	/* write a dummy byte to the pipe so fh becomes ready */	999	/* write a dummy byte to the pipe so fh becomes ready */
499	write (respipe [1], &respipe, 1);	1000	write (respipe [1], &respipe, 1);
500	}
501		1001
502	pthread_mutex_unlock (&reslock);	1002	self->req = 0;
		1003	worker_clear (self);
		1004
		1005	UNLOCK (reslock);
503	}	1006	}
504	while (type != REQ_QUIT);	1007	while (type != REQ_QUIT);
505		1008
		1009	LOCK (wrklock);
		1010	worker_free (self);
		1011	UNLOCK (wrklock);
		1012
506	return 0;	1013	return 0;
		1014	}
		1015
		1016	/*****************************************************************************/
		1017
		1018	static void atfork_prepare (void)
		1019	{
		1020	LOCK (wrklock);
		1021	LOCK (reqlock);
		1022	LOCK (reslock);
		1023	#if !HAVE_PREADWRITE
		1024	LOCK (preadwritelock);
		1025	#endif
		1026	#if !HAVE_READDIR_R
		1027	LOCK (readdirlock);
		1028	#endif
		1029	}
		1030
		1031	static void atfork_parent (void)
		1032	{
		1033	#if !HAVE_READDIR_R
		1034	UNLOCK (readdirlock);
		1035	#endif
		1036	#if !HAVE_PREADWRITE
		1037	UNLOCK (preadwritelock);
		1038	#endif
		1039	UNLOCK (reslock);
		1040	UNLOCK (reqlock);
		1041	UNLOCK (wrklock);
		1042	}
		1043
		1044	static void atfork_child (void)
		1045	{
		1046	aio_req prv;
		1047
		1048	while (prv = reqq_shift (&req_queue))
		1049	req_free (prv);
		1050
		1051	while (prv = reqq_shift (&res_queue))
		1052	req_free (prv);
		1053
		1054	while (wrk_first.next != &wrk_first)
		1055	{
		1056	worker *wrk = wrk_first.next;
		1057
		1058	if (wrk->req)
		1059	req_free (wrk->req);
		1060
		1061	worker_clear (wrk);
		1062	worker_free (wrk);
		1063	}
		1064
		1065	started = 0;
		1066	nreqs = 0;
		1067
		1068	close (respipe [0]);
		1069	close (respipe [1]);
		1070	create_pipe ();
		1071
		1072	atfork_parent ();
507	}	1073	}
508		1074
509	#define dREQ \	1075	#define dREQ \
510	aio_req req; \	1076	aio_req req; \
		1077	int req_pri = next_pri; \
		1078	next_pri = DEFAULT_PRI + PRI_BIAS; \
511	\	1079	\
512	if (SvOK (callback) && !SvROK (callback)) \	1080	if (SvOK (callback) && !SvROK (callback)) \
513	croak ("clalback must be undef or of reference type"); \	1081	croak ("callback must be undef or of reference type"); \
514	\	1082	\
515	Newz (0, req, 1, aio_cb); \	1083	Newz (0, req, 1, aio_cb); \
516	if (!req) \	1084	if (!req) \
517	croak ("out of memory during aio_req allocation"); \	1085	croak ("out of memory during aio_req allocation"); \
518	\	1086	\
519	req->callback = newSVsv (callback);	1087	req->callback = newSVsv (callback); \
		1088	req->pri = req_pri
		1089
		1090	#define REQ_SEND \
		1091	req_send (req); \
		1092	\
		1093	if (GIMME_V != G_VOID) \
		1094	XPUSHs (req_sv (req, AIO_REQ_KLASS));
520		1095
521	MODULE = IO::AIO PACKAGE = IO::AIO	1096	MODULE = IO::AIO PACKAGE = IO::AIO
522		1097
523	PROTOTYPES: ENABLE	1098	PROTOTYPES: ENABLE
524		1099
525	BOOT:	1100	BOOT:
526	{	1101	{
		1102	HV *stash = gv_stashpv ("IO::AIO", 1);
		1103	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1104	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1105	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1106
527	create_pipe ();	1107	create_pipe ();
528	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1108	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
529	}	1109	}
530		1110
531	void	1111	void
532	min_parallel(nthreads)	1112	min_parallel (nthreads)
533	int nthreads	1113	int nthreads
534	PROTOTYPE: $	1114	PROTOTYPE: $
535		1115
536	void	1116	void
537	max_parallel(nthreads)	1117	max_parallel (nthreads)
538	int nthreads	1118	int nthreads
539	PROTOTYPE: $	1119	PROTOTYPE: $
540		1120
541	int	1121	int
542	max_outstanding(nreqs)	1122	max_outstanding (nreqs)
543	int nreqs	1123	int nreqs
544	PROTOTYPE: $	1124	PROTOTYPE: $
545	CODE:	1125	CODE:
546	RETVAL = max_outstanding;	1126	RETVAL = max_outstanding;
547	max_outstanding = nreqs;	1127	max_outstanding = nreqs;
548		1128
549	void	1129	void
550	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1130	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
551	SV * pathname	1131	SV * pathname
552	int flags	1132	int flags
553	int mode	1133	int mode
554	SV * callback	1134	SV * callback
555	PROTOTYPE: $$$;$	1135	PROTOTYPE: $$$;$
556	CODE:	1136	PPCODE:
557	{	1137	{
558	dREQ;	1138	dREQ;
559		1139
560	req->type = REQ_OPEN;	1140	req->type = REQ_OPEN;
561	req->data = newSVsv (pathname);	1141	req->data = newSVsv (pathname);
562	req->dataptr = SvPVbyte_nolen (req->data);	1142	req->dataptr = SvPVbyte_nolen (req->data);
563	req->fd = flags;	1143	req->fd = flags;
564	req->mode = mode;	1144	req->mode = mode;
565		1145
566	send_req (req);	1146	REQ_SEND;
567	}	1147	}
568		1148
569	void	1149	void
570	aio_close(fh,callback=&PL_sv_undef)	1150	aio_close (fh,callback=&PL_sv_undef)
571	SV * fh	1151	SV * fh
572	SV * callback	1152	SV * callback
573	PROTOTYPE: $;$	1153	PROTOTYPE: $;$
574	ALIAS:	1154	ALIAS:
575	aio_close = REQ_CLOSE	1155	aio_close = REQ_CLOSE
576	aio_fsync = REQ_FSYNC	1156	aio_fsync = REQ_FSYNC
577	aio_fdatasync = REQ_FDATASYNC	1157	aio_fdatasync = REQ_FDATASYNC
578	CODE:	1158	PPCODE:
579	{	1159	{
580	dREQ;	1160	dREQ;
581		1161
582	req->type = ix;	1162	req->type = ix;
583	req->fh = newSVsv (fh);	1163	req->fh = newSVsv (fh);
584	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1164	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
585		1165
586	send_req (req);	1166	REQ_SEND (req);
587	}	1167	}
588		1168
589	void	1169	void
590	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1170	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
591	SV * fh	1171	SV * fh
592	UV offset	1172	UV offset
593	IV length	1173	UV length
594	SV * data	1174	SV * data
595	IV dataoffset	1175	UV dataoffset
596	SV * callback	1176	SV * callback
597	ALIAS:	1177	ALIAS:
598	aio_read = REQ_READ	1178	aio_read = REQ_READ
599	aio_write = REQ_WRITE	1179	aio_write = REQ_WRITE
600	PROTOTYPE: $$$$$;$	1180	PROTOTYPE: $$$$$;$
601	CODE:	1181	PPCODE:
602	{	1182	{
603	aio_req req;	1183	aio_req req;
604	STRLEN svlen;	1184	STRLEN svlen;
605	char *svptr = SvPVbyte (data, svlen);	1185	char *svptr = SvPVbyte (data, svlen);
606		1186
…		…
644	{	1224	{
645	SvREADONLY_on (data);	1225	SvREADONLY_on (data);
646	req->data2ptr = (void *)data;	1226	req->data2ptr = (void *)data;
647	}	1227	}
648		1228
649	send_req (req);	1229	REQ_SEND;
650	}	1230	}
651	}	1231	}
652		1232
653	void	1233	void
		1234	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1235	SV * out_fh
		1236	SV * in_fh
		1237	UV in_offset
		1238	UV length
		1239	SV * callback
		1240	PROTOTYPE: $$$$;$
		1241	PPCODE:
		1242	{
		1243	dREQ;
		1244
		1245	req->type = REQ_SENDFILE;
		1246	req->fh = newSVsv (out_fh);
		1247	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1248	req->fh2 = newSVsv (in_fh);
		1249	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1250	req->offset = in_offset;
		1251	req->length = length;
		1252
		1253	REQ_SEND;
		1254	}
		1255
		1256	void
654	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1257	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
655	SV * fh	1258	SV * fh
656	UV offset	1259	UV offset
657	IV length	1260	IV length
658	SV * callback	1261	SV * callback
659	PROTOTYPE: $$$;$	1262	PROTOTYPE: $$$;$
660	CODE:	1263	PPCODE:
661	{	1264	{
662	dREQ;	1265	dREQ;
663		1266
664	req->type = REQ_READAHEAD;	1267	req->type = REQ_READAHEAD;
665	req->fh = newSVsv (fh);	1268	req->fh = newSVsv (fh);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1269	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
667	req->offset = offset;	1270	req->offset = offset;
668	req->length = length;	1271	req->length = length;
669		1272
670	send_req (req);	1273	REQ_SEND;
671	}	1274	}
672		1275
673	void	1276	void
674	aio_stat(fh_or_path,callback=&PL_sv_undef)	1277	aio_stat (fh_or_path,callback=&PL_sv_undef)
675	SV * fh_or_path	1278	SV * fh_or_path
676	SV * callback	1279	SV * callback
677	ALIAS:	1280	ALIAS:
678	aio_stat = REQ_STAT	1281	aio_stat = REQ_STAT
679	aio_lstat = REQ_LSTAT	1282	aio_lstat = REQ_LSTAT
680	CODE:	1283	PPCODE:
681	{	1284	{
682	dREQ;	1285	dREQ;
683		1286
684	New (0, req->statdata, 1, Stat_t);	1287	New (0, req->statdata, 1, Stat_t);
685	if (!req->statdata)	1288	if (!req->statdata)
686	{	1289	{
687	free_req (req);	1290	req_free (req);
688	croak ("out of memory during aio_req->statdata allocation");	1291	croak ("out of memory during aio_req->statdata allocation");
689	}	1292	}
690		1293
691	if (SvPOK (fh_or_path))	1294	if (SvPOK (fh_or_path))
692	{	1295	{
…		…
699	req->type = REQ_FSTAT;	1302	req->type = REQ_FSTAT;
700	req->fh = newSVsv (fh_or_path);	1303	req->fh = newSVsv (fh_or_path);
701	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1304	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
702	}	1305	}
703		1306
704	send_req (req);	1307	REQ_SEND;
705	}	1308	}
706		1309
707	void	1310	void
708	aio_unlink(pathname,callback=&PL_sv_undef)	1311	aio_unlink (pathname,callback=&PL_sv_undef)
709	SV * pathname	1312	SV * pathname
710	SV * callback	1313	SV * callback
711	ALIAS:	1314	ALIAS:
712	aio_unlink = REQ_UNLINK	1315	aio_unlink = REQ_UNLINK
713	aio_rmdir = REQ_RMDIR	1316	aio_rmdir = REQ_RMDIR
		1317	aio_readdir = REQ_READDIR
714	CODE:	1318	PPCODE:
715	{	1319	{
716	dREQ;	1320	dREQ;
717		1321
718	req->type = ix;	1322	req->type = ix;
719	req->data = newSVsv (pathname);	1323	req->data = newSVsv (pathname);
720	req->dataptr = SvPVbyte_nolen (req->data);	1324	req->dataptr = SvPVbyte_nolen (req->data);
721		1325
722	send_req (req);	1326	REQ_SEND;
723	}	1327	}
724		1328
725	void	1329	void
726	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1330	aio_link (oldpath,newpath,callback=&PL_sv_undef)
727	SV * oldpath	1331	SV * oldpath
728	SV * newpath	1332	SV * newpath
729	SV * callback	1333	SV * callback
		1334	ALIAS:
		1335	aio_link = REQ_LINK
		1336	aio_symlink = REQ_SYMLINK
		1337	aio_rename = REQ_RENAME
730	CODE:	1338	PPCODE:
731	{	1339	{
732	dREQ;	1340	dREQ;
733		1341
734	req->type = REQ_SYMLINK;	1342	req->type = ix;
735	req->fh = newSVsv (oldpath);	1343	req->fh = newSVsv (oldpath);
736	req->data2ptr = SvPVbyte_nolen (req->fh);	1344	req->data2ptr = SvPVbyte_nolen (req->fh);
737	req->data = newSVsv (newpath);	1345	req->data = newSVsv (newpath);
738	req->dataptr = SvPVbyte_nolen (req->data);	1346	req->dataptr = SvPVbyte_nolen (req->data);
739		1347
740	send_req (req);	1348	REQ_SEND;
741	}	1349	}
742		1350
743	void	1351	void
		1352	aio_busy (delay,callback=&PL_sv_undef)
		1353	double delay
		1354	SV * callback
		1355	PPCODE:
		1356	{
		1357	dREQ;
		1358
		1359	req->type = REQ_BUSY;
		1360	req->fd = delay < 0. ? 0 : delay;
		1361	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1362
		1363	REQ_SEND;
		1364	}
		1365
		1366	void
		1367	aio_group (callback=&PL_sv_undef)
		1368	SV * callback
		1369	PROTOTYPE: ;$
		1370	PPCODE:
		1371	{
		1372	dREQ;
		1373
		1374	req->type = REQ_GROUP;
		1375	req_send (req);
		1376
		1377	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1378	}
		1379
		1380	void
		1381	aio_nop (callback=&PL_sv_undef)
		1382	SV * callback
		1383	PPCODE:
		1384	{
		1385	dREQ;
		1386
		1387	req->type = REQ_NOP;
		1388
		1389	REQ_SEND;
		1390	}
		1391
		1392	void
		1393	aioreq_pri (int pri = DEFAULT_PRI)
		1394	CODE:
		1395	if (pri < PRI_MIN) pri = PRI_MIN;
		1396	if (pri > PRI_MAX) pri = PRI_MAX;
		1397	next_pri = pri + PRI_BIAS;
		1398
		1399	void
		1400	aioreq_nice (int nice = 0)
		1401	CODE:
		1402	nice = next_pri - nice;
		1403	if (nice < PRI_MIN) nice = PRI_MIN;
		1404	if (nice > PRI_MAX) nice = PRI_MAX;
		1405	next_pri = nice + PRI_BIAS;
		1406
		1407	void
744	flush()	1408	flush ()
745	PROTOTYPE:	1409	PROTOTYPE:
746	CODE:	1410	CODE:
747	while (nreqs)	1411	while (nreqs)
748	{	1412	{
749	poll_wait ();	1413	poll_wait ();
…		…
789	CODE:	1453	CODE:
790	RETVAL = nreqs;	1454	RETVAL = nreqs;
791	OUTPUT:	1455	OUTPUT:
792	RETVAL	1456	RETVAL
793		1457
		1458	PROTOTYPES: DISABLE
		1459
		1460	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1461
		1462	void
		1463	cancel (aio_req_ornot req)
		1464	CODE:
		1465	req_cancel (req);
		1466
		1467	void
		1468	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1469	CODE:
		1470	SvREFCNT_dec (req->callback);
		1471	req->callback = newSVsv (callback);
		1472
		1473	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1474
		1475	void
		1476	add (aio_req grp, ...)
		1477	PPCODE:
		1478	{
		1479	int i;
		1480	aio_req req;
		1481
		1482	if (grp->fd == 2)
		1483	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1484
		1485	for (i = 1; i < items; ++i )
		1486	{
		1487	if (GIMME_V != G_VOID)
		1488	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1489
		1490	req = SvAIO_REQ (ST (i));
		1491
		1492	if (req)
		1493	{
		1494	++grp->length;
		1495	req->grp = grp;
		1496
		1497	req->grp_prev = 0;
		1498	req->grp_next = grp->grp_first;
		1499
		1500	if (grp->grp_first)
		1501	grp->grp_first->grp_prev = req;
		1502
		1503	grp->grp_first = req;
		1504	}
		1505	}
		1506	}
		1507
		1508	void
		1509	cancel_subs (aio_req_ornot req)
		1510	CODE:
		1511	req_cancel_subs (req);
		1512
		1513	void
		1514	result (aio_req grp, ...)
		1515	CODE:
		1516	{
		1517	int i;
		1518	AV *av = newAV ();
		1519
		1520	for (i = 1; i < items; ++i )
		1521	av_push (av, newSVsv (ST (i)));
		1522
		1523	SvREFCNT_dec (grp->data);
		1524	grp->data = (SV *)av;
		1525	}
		1526
		1527	void
		1528	limit (aio_req grp, int limit)
		1529	CODE:
		1530	grp->fd2 = limit;
		1531	aio_grp_feed (grp);
		1532
		1533	void
		1534	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1535	CODE:
		1536	{
		1537	SvREFCNT_dec (grp->fh2);
		1538	grp->fh2 = newSVsv (callback);
		1539
		1540	if (grp->fd2 <= 0)
		1541	grp->fd2 = 2;
		1542
		1543	aio_grp_feed (grp);
		1544	}
		1545

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