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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.34 by root, Tue Aug 23 00:03:14 2005 UTC vs.
Revision 1.70 by root, Tue Oct 24 15:15:56 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 = malloc (AIO_BUFSIZE); \
		65	if (!aio_buf) \
		66	return -1;
		67
		68	#define fBUF free (aio_buf)
38		69
39	enum {	70	enum {
40	REQ_QUIT,	71	REQ_QUIT,
41	REQ_OPEN, REQ_CLOSE,	72	REQ_OPEN, REQ_CLOSE,
42	REQ_READ, REQ_WRITE, REQ_READAHEAD,	73	REQ_READ, REQ_WRITE, REQ_READAHEAD,
43	REQ_SENDFILE,	74	REQ_SENDFILE,
44	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	75	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
45	REQ_FSYNC, REQ_FDATASYNC,	76	REQ_FSYNC, REQ_FDATASYNC,
46	REQ_UNLINK, REQ_RMDIR,	77	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
47	REQ_SYMLINK,	78	REQ_READDIR,
		79	REQ_LINK, REQ_SYMLINK,
		80	REQ_GROUP, REQ_NOP,
		81	REQ_BUSY,
48	};	82	};
49		83
		84	#define AIO_REQ_KLASS "IO::AIO::REQ"
		85	#define AIO_GRP_KLASS "IO::AIO::GRP"
		86
50	typedef struct aio_cb {	87	typedef struct aio_cb
		88	{
51	struct aio_cb *volatile next;	89	struct aio_cb *volatile next;
52		90
53	int type;	91	SV *data, *callback;
54		92	SV *fh, *fh2;
55	int fd, fd2;	93	void *dataptr, *data2ptr;
		94	Stat_t *statdata;
56	off_t offset;	95	off_t offset;
57	size_t length;	96	size_t length;
58	ssize_t result;	97	ssize_t result;
		98
		99	STRLEN dataoffset;
		100	int type;
		101	int fd, fd2;
		102	int errorno;
59	mode_t mode; /* open */	103	mode_t mode; /* open */
60	int errorno;
61	SV *data, *callback;
62	SV *fh, *fh2;
63	void *dataptr, *data2ptr;
64	STRLEN dataoffset;
65		104
66	Stat_t *statdata;	105	unsigned char flags;
		106	unsigned char pri;
		107
		108	SV *self; /* the perl counterpart of this request, if any */
		109	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
67	} aio_cb;	110	} aio_cb;
68		111
		112	enum {
		113	FLAG_CANCELLED = 0x01,
		114	};
		115
69	typedef aio_cb *aio_req;	116	typedef aio_cb *aio_req;
		117	typedef aio_cb *aio_req_ornot;
		118
		119	enum {
		120	PRI_MIN = -4,
		121	PRI_MAX = 4,
		122
		123	DEFAULT_PRI = 0,
		124	PRI_BIAS = -PRI_MIN,
		125	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		126	};
		127
		128	static int next_pri = DEFAULT_PRI + PRI_BIAS;
70		129
71	static int started, wanted;	130	static int started, wanted;
72	static volatile int nreqs;	131	static volatile int nreqs;
73	static int max_outstanding = 1<<30;	132	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
76	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	141	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
77	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	142	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
78	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	143	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
79		144
80	static volatile aio_req reqs, reqe; /* queue start, queue end */	145	/*
81	static volatile aio_req ress, rese; /* queue start, queue end */	146	* a somewhat faster data structure might be nice, but
		147	* with 8 priorities this actually needs <20 insns
		148	* per shift, the most expensive operation.
		149	*/
		150	typedef struct {
		151	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		152	int size;
		153	} reqq;
82		154
		155	static reqq req_queue;
		156	static reqq res_queue;
		157
		158	int reqq_push (reqq *q, aio_req req)
		159	{
		160	int pri = req->pri;
		161	req->next = 0;
		162
		163	if (q->qe[pri])
		164	{
		165	q->qe[pri]->next = req;
		166	q->qe[pri] = req;
		167	}
		168	else
		169	q->qe[pri] = q->qs[pri] = req;
		170
		171	return q->size++;
		172	}
		173
		174	aio_req reqq_shift (reqq *q)
		175	{
		176	int pri;
		177
		178	if (!q->size)
		179	return 0;
		180
		181	--q->size;
		182
		183	for (pri = NUM_PRI; pri--; )
		184	{
		185	aio_req req = q->qs[pri];
		186
		187	if (req)
		188	{
		189	if (!(q->qs[pri] = req->next))
		190	q->qe[pri] = 0;
		191
		192	return req;
		193	}
		194	}
		195
		196	abort ();
		197	}
		198
		199	static void req_invoke (aio_req req);
83	static void free_req (aio_req req)	200	static void req_free (aio_req req);
84	{
85	if (req->data)
86	SvREFCNT_dec (req->data);
87		201
		202	/* must be called at most once */
		203	static SV *req_sv (aio_req req, const char *klass)
		204	{
88	if (req->fh)	205	if (!req->self)
89	SvREFCNT_dec (req->fh);	206	{
		207	req->self = (SV *)newHV ();
		208	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		209	}
90		210
91	if (req->fh2)	211	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		212	}
		213
		214	static aio_req SvAIO_REQ (SV *sv)
		215	{
		216	MAGIC *mg;
		217
		218	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		219	croak ("object of class " AIO_REQ_KLASS " expected");
		220
		221	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		222
		223	return mg ? (aio_req)mg->mg_ptr : 0;
		224	}
		225
		226	static void aio_grp_feed (aio_req grp)
		227	{
		228	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		229	{
		230	int old_len = grp->length;
		231
		232	if (grp->fh2 && SvOK (grp->fh2))
		233	{
		234	dSP;
		235
		236	ENTER;
		237	SAVETMPS;
		238	PUSHMARK (SP);
		239	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		240	PUTBACK;
		241	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		242	SPAGAIN;
		243	FREETMPS;
		244	LEAVE;
		245	}
		246
		247	/* stop if no progress has been made */
		248	if (old_len == grp->length)
		249	{
92	SvREFCNT_dec (req->fh2);	250	SvREFCNT_dec (grp->fh2);
93		251	grp->fh2 = 0;
94	if (req->statdata)	252	break;
95	Safefree (req->statdata);	253	}
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	{	254	}
		255	}
		256
		257	static void aio_grp_dec (aio_req grp)
		258	{
		259	--grp->length;
		260
		261	/* call feeder, if applicable */
		262	aio_grp_feed (grp);
		263
		264	/* finish, if done */
		265	if (!grp->length && grp->fd)
		266	{
		267	req_invoke (grp);
		268	req_free (grp);
		269	}
		270	}
		271
		272	static void poll_wait ()
		273	{
108	fd_set rfd;	274	fd_set rfd;
		275
		276	while (nreqs)
		277	{
		278	int size;
		279	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
		280	pthread_mutex_lock (&reslock);
		281	#endif
		282	size = res_queue.size;
		283	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
		284	pthread_mutex_unlock (&reslock);
		285	#endif
		286
		287	if (size)
		288	return;
		289
109	FD_ZERO(&rfd);	290	FD_ZERO(&rfd);
110	FD_SET(respipe [0], &rfd);	291	FD_SET(respipe [0], &rfd);
111		292
112	select (respipe [0] + 1, &rfd, 0, 0, 0);	293	select (respipe [0] + 1, &rfd, 0, 0, 0);
113	}	294	}
114	}	295	}
115		296
116	static int	297	static void req_invoke (aio_req req)
117	poll_cb ()	298	{
		299	dSP;
		300
		301	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		302	{
		303	errno = req->errorno;
		304
		305	ENTER;
		306	SAVETMPS;
		307	PUSHMARK (SP);
		308	EXTEND (SP, 1);
		309
		310	switch (req->type)
		311	{
		312	case REQ_READDIR:
		313	{
		314	SV *rv = &PL_sv_undef;
		315
		316	if (req->result >= 0)
		317	{
		318	char *buf = req->data2ptr;
		319	AV *av = newAV ();
		320
		321	while (req->result)
		322	{
		323	SV *sv = newSVpv (buf, 0);
		324
		325	av_push (av, sv);
		326	buf += SvCUR (sv) + 1;
		327	req->result--;
		328	}
		329
		330	rv = sv_2mortal (newRV_noinc ((SV *)av));
		331	}
		332
		333	PUSHs (rv);
		334	}
		335	break;
		336
		337	case REQ_OPEN:
		338	{
		339	/* convert fd to fh */
		340	SV *fh;
		341
		342	PUSHs (sv_2mortal (newSViv (req->result)));
		343	PUTBACK;
		344	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		345	SPAGAIN;
		346
		347	fh = SvREFCNT_inc (POPs);
		348
		349	PUSHMARK (SP);
		350	XPUSHs (sv_2mortal (fh));
		351	}
		352	break;
		353
		354	case REQ_GROUP:
		355	req->fd = 2; /* mark group as finished */
		356
		357	if (req->data)
		358	{
		359	int i;
		360	AV *av = (AV *)req->data;
		361
		362	EXTEND (SP, AvFILL (av) + 1);
		363	for (i = 0; i <= AvFILL (av); ++i)
		364	PUSHs (*av_fetch (av, i, 0));
		365	}
		366	break;
		367
		368	case REQ_NOP:
		369	case REQ_BUSY:
		370	break;
		371
		372	default:
		373	PUSHs (sv_2mortal (newSViv (req->result)));
		374	break;
		375	}
		376
		377
		378	PUTBACK;
		379	call_sv (req->callback, G_VOID | G_EVAL);
		380	SPAGAIN;
		381
		382	FREETMPS;
		383	LEAVE;
		384	}
		385
		386	if (req->grp)
		387	{
		388	aio_req grp = req->grp;
		389
		390	/* unlink request */
		391	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		392	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		393
		394	if (grp->grp_first == req)
		395	grp->grp_first = req->grp_next;
		396
		397	aio_grp_dec (grp);
		398	}
		399
		400	if (SvTRUE (ERRSV))
		401	{
		402	req_free (req);
		403	croak (0);
		404	}
		405	}
		406
		407	static void req_free (aio_req req)
		408	{
		409	if (req->self)
		410	{
		411	sv_unmagic (req->self, PERL_MAGIC_ext);
		412	SvREFCNT_dec (req->self);
		413	}
		414
		415	SvREFCNT_dec (req->data);
		416	SvREFCNT_dec (req->fh);
		417	SvREFCNT_dec (req->fh2);
		418	SvREFCNT_dec (req->callback);
		419	Safefree (req->statdata);
		420
		421	if (req->type == REQ_READDIR && req->result >= 0)
		422	free (req->data2ptr);
		423
		424	Safefree (req);
		425	}
		426
		427	static void req_cancel (aio_req req)
		428	{
		429	req->flags |= FLAG_CANCELLED;
		430
		431	if (req->type == REQ_GROUP)
		432	{
		433	aio_req sub;
		434
		435	for (sub = req->grp_first; sub; sub = sub->grp_next)
		436	req_cancel (sub);
		437	}
		438	}
		439
		440	static int poll_cb ()
118	{	441	{
119	dSP;	442	dSP;
120	int count = 0;	443	int count = 0;
121	int do_croak = 0;	444	int do_croak = 0;
122	aio_req req;	445	aio_req req;
123		446
124	for (;;)	447	for (;;)
125	{	448	{
126	pthread_mutex_lock (&reslock);	449	pthread_mutex_lock (&reslock);
127	req = ress;	450	req = reqq_shift (&res_queue);
128		451
129	if (req)	452	if (req)
130	{	453	{
131	ress = req->next;
132
133	if (!ress)	454	if (!res_queue.size)
134	{	455	{
135	/* read any signals sent by the worker threads */	456	/* read any signals sent by the worker threads */
136	char buf [32];	457	char buf [32];
137	while (read (respipe [0], buf, 32) == 32)	458	while (read (respipe [0], buf, 32) == 32)
138	;	459	;
139
140	rese = 0;
141	}	460	}
142	}	461	}
143		462
144	pthread_mutex_unlock (&reslock);	463	pthread_mutex_unlock (&reslock);
145		464
146	if (!req)	465	if (!req)
147	break;	466	break;
148		467
149	nreqs--;	468	--nreqs;
150		469
151	if (req->type == REQ_QUIT)	470	if (req->type == REQ_QUIT)
152	started--;	471	started--;
		472	else if (req->type == REQ_GROUP && req->length)
		473	{
		474	req->fd = 1; /* mark request as delayed */
		475	continue;
		476	}
153	else	477	else
154	{	478	{
155	int errorno = errno;
156	errno = req->errorno;
157
158	if (req->type == REQ_READ)	479	if (req->type == REQ_READ)
159	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));	480	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
160		481
161	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))	482	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
162	SvREADONLY_off (req->data);	483	SvREADONLY_off (req->data);
…		…
166	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
167	PL_laststatval = req->result;	488	PL_laststatval = req->result;
168	PL_statcache = *(req->statdata);	489	PL_statcache = *(req->statdata);
169	}	490	}
170		491
171	ENTER;	492	req_invoke (req);
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (newSViv (req->result)));
174		493
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++;	494	count++;
207	}	495	}
208		496
209	free_req (req);	497	req_free (req);
210	}	498	}
211		499
212	return count;	500	return count;
213	}	501	}
214		502
215	static void *aio_proc(void *arg);	503	static void *aio_proc(void *arg);
216		504
217	static void
218	start_thread (void)	505	static void start_thread (void)
219	{	506	{
220	sigset_t fullsigset, oldsigset;	507	sigset_t fullsigset, oldsigset;
221	pthread_t tid;	508	pthread_t tid;
222	pthread_attr_t attr;	509	pthread_attr_t attr;
223		510
…		…
232	started++;	519	started++;
233		520
234	sigprocmask (SIG_SETMASK, &oldsigset, 0);	521	sigprocmask (SIG_SETMASK, &oldsigset, 0);
235	}	522	}
236		523
237	static void	524	static void req_send (aio_req req)
238	send_req (aio_req req)
239	{	525	{
240	while (started < wanted && nreqs >= started)	526	while (started < wanted && nreqs >= started)
241	start_thread ();	527	start_thread ();
242		528
243	nreqs++;	529	++nreqs;
244		530
245	pthread_mutex_lock (&reqlock);	531	pthread_mutex_lock (&reqlock);
246		532	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);	533	pthread_cond_signal (&reqwait);
258	pthread_mutex_unlock (&reqlock);	534	pthread_mutex_unlock (&reqlock);
259		535
260	if (nreqs > max_outstanding)	536	if (nreqs > max_outstanding)
261	for (;;)	537	for (;;)
…		…
267		543
268	poll_wait ();	544	poll_wait ();
269	}	545	}
270	}	546	}
271		547
272	static void	548	static void end_thread (void)
273	end_thread (void)
274	{	549	{
275	aio_req req;	550	aio_req req;
		551
276	Newz (0, req, 1, aio_cb);	552	Newz (0, req, 1, aio_cb);
		553
277	req->type = REQ_QUIT;	554	req->type = REQ_QUIT;
		555	req->pri = PRI_MAX + PRI_BIAS;
278		556
279	send_req (req);	557	req_send (req);
280	}	558	}
281		559
282	static void min_parallel (int nthreads)	560	static void min_parallel (int nthreads)
283	{	561	{
284	if (wanted < nthreads)	562	if (wanted < nthreads)
…		…
313	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	591	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
314	croak ("cannot set result pipe to nonblocking mode");	592	croak ("cannot set result pipe to nonblocking mode");
315		593
316	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	594	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
317	croak ("cannot set result pipe to nonblocking mode");	595	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	}	596	}
362		597
363	/*****************************************************************************/	598	/*****************************************************************************/
364	/* work around various missing functions */	599	/* work around various missing functions */
365		600
…		…
370	/*	605	/*
371	* make our pread/pwrite safe against themselves, but not against	606	* make our pread/pwrite safe against themselves, but not against
372	* normal read/write by using a mutex. slows down execution a lot,	607	* normal read/write by using a mutex. slows down execution a lot,
373	* but that's your problem, not mine.	608	* but that's your problem, not mine.
374	*/	609	*/
375	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;	610	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
376		611
377	static ssize_t	612	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	{	613	{
380	ssize_t res;	614	ssize_t res;
381	off_t ooffset;	615	off_t ooffset;
382		616
383	pthread_mutex_lock (&iolock);	617	pthread_mutex_lock (&preadwritelock);
384	ooffset = lseek (fd, 0, SEEK_CUR);	618	ooffset = lseek (fd, 0, SEEK_CUR);
385	lseek (fd, offset, SEEK_SET);	619	lseek (fd, offset, SEEK_SET);
386	res = read (fd, buf, count);	620	res = read (fd, buf, count);
387	lseek (fd, ooffset, SEEK_SET);	621	lseek (fd, ooffset, SEEK_SET);
388	pthread_mutex_unlock (&iolock);	622	pthread_mutex_unlock (&preadwritelock);
389		623
390	return res;	624	return res;
391	}	625	}
392		626
393	static ssize_t
394	pwrite (int fd, void *buf, size_t count, off_t offset)	627	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
395	{	628	{
396	ssize_t res;	629	ssize_t res;
397	off_t ooffset;	630	off_t ooffset;
398		631
399	pthread_mutex_lock (&iolock);	632	pthread_mutex_lock (&preadwritelock);
400	ooffset = lseek (fd, 0, SEEK_CUR);	633	ooffset = lseek (fd, 0, SEEK_CUR);
401	lseek (fd, offset, SEEK_SET);	634	lseek (fd, offset, SEEK_SET);
402	res = write (fd, buf, count);	635	res = write (fd, buf, count);
403	lseek (fd, offset, SEEK_SET);	636	lseek (fd, offset, SEEK_SET);
404	pthread_mutex_unlock (&iolock);	637	pthread_mutex_unlock (&preadwritelock);
405		638
406	return res;	639	return res;
407	}	640	}
408	#endif	641	#endif
409		642
…		…
412	#endif	645	#endif
413		646
414	#if !HAVE_READAHEAD	647	#if !HAVE_READAHEAD
415	# define readahead aio_readahead	648	# define readahead aio_readahead
416		649
417	static char readahead_buf[4096];
418
419	static ssize_t
420	readahead (int fd, off_t offset, size_t count)	650	static ssize_t readahead (int fd, off_t offset, size_t count)
421	{	651	{
		652	dBUF;
		653
422	while (count > 0)	654	while (count > 0)
423	{	655	{
424	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	656	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
425		657
426	pread (fd, readahead_buf, len, offset);	658	pread (fd, aio_buf, len, offset);
427	offset += len;	659	offset += len;
428	count -= len;	660	count -= len;
429	}	661	}
430		662
		663	fBUF;
		664
431	errno = 0;	665	errno = 0;
432	}	666	}
433	#endif	667	#endif
434		668
		669	#if !HAVE_READDIR_R
		670	# define readdir_r aio_readdir_r
		671
		672	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		673
		674	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		675	{
		676	struct dirent *e;
		677	int errorno;
		678
		679	pthread_mutex_lock (&readdirlock);
		680
		681	e = readdir (dirp);
		682	errorno = errno;
		683
		684	if (e)
		685	{
		686	*res = ent;
		687	strcpy (ent->d_name, e->d_name);
		688	}
		689	else
		690	*res = 0;
		691
		692	pthread_mutex_unlock (&readdirlock);
		693
		694	errno = errorno;
		695	return e ? 0 : -1;
		696	}
		697	#endif
		698
435	/* sendfile always needs emulation */	699	/* sendfile always needs emulation */
436	static ssize_t
437	sendfile_ (int ofd, int ifd, off_t offset, size_t count)	700	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
438	{	701	{
439	ssize_t res;	702	ssize_t res;
440		703
441	if (!count)	704	if (!count)
442	return 0;	705	return 0;
443		706
		707	#if HAVE_SENDFILE
444	#if __linux	708	# if __linux
445	res = sendfile (ofd, ifd, &offset, count);	709	res = sendfile (ofd, ifd, &offset, count);
446		710
447	#elif __freebsd	711	# elif __freebsd
448	/*	712	/*
449	* Of course, the freebsd sendfile is a dire hack with no thoughts	713	* Of course, the freebsd sendfile is a dire hack with no thoughts
450	* wasted on making it similar to other i/o functions.	714	* wasted on making it similar to other I/O functions.
451	*/	715	*/
452	{	716	{
453	off_t sbytes;	717	off_t sbytes;
454	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);	718	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
455		719
456	if (!res && errno == EAGAIN)	720	if (res < 0 && sbytes)
457	/* maybe on others, too, as usual, the manpage leaves you guessing */	721	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
458	res = sbytes;	722	res = sbytes;
459	}	723	}
460		724
461	#elif __hpux	725	# elif __hpux
462	res = sendfile (ofd, ifd, offset, count, 0, 0);	726	res = sendfile (ofd, ifd, offset, count, 0, 0);
463		727
		728	# elif __solaris
		729	{
		730	struct sendfilevec vec;
		731	size_t sbytes;
		732
		733	vec.sfv_fd = ifd;
		734	vec.sfv_flag = 0;
		735	vec.sfv_off = offset;
		736	vec.sfv_len = count;
		737
		738	res = sendfilev (ofd, &vec, 1, &sbytes);
		739
		740	if (res < 0 && sbytes)
		741	res = sbytes;
		742	}
		743
		744	# endif
464	#else	745	#else
465	res = -1;	746	res = -1;
466	errno = ENOSYS;	747	errno = ENOSYS;
467	#endif	748	#endif
468		749
		750	if (res < 0
469	if (res < 0 && (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK))	751	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		752	#if __solaris
		753	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		754	#endif
		755	)
		756	)
470	{	757	{
471	/* emulate sendfile. this is a major pain in the ass */	758	/* emulate sendfile. this is a major pain in the ass */
472	char *buf = malloc (4096);	759	dBUF;
		760
473	res = 0;	761	res = 0;
474		762
475	for (;;)	763	while (count)
476	{	764	{
477	ssize_t cnt;	765	ssize_t cnt;
478		766
479	cnt = pread (ifd, buf, 4096, offset);	767	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
480		768
481	if (cnt <= 0)	769	if (cnt <= 0)
482	{	770	{
483	if (cnt && !res) res = -1;	771	if (cnt && !res) res = -1;
484	break;	772	break;
485	}	773	}
486		774
487	cnt = write (ofd, buf, cnt);	775	cnt = write (ofd, aio_buf, cnt);
488		776
489	if (cnt <= 0)	777	if (cnt <= 0)
490	{	778	{
491	if (cnt && !res) res = -1;	779	if (cnt && !res) res = -1;
492	break;	780	break;
493	}	781	}
494		782
495	offset += cnt;	783	offset += cnt;
496	res += cnt;	784	res += cnt;
		785	count -= cnt;
497	}	786	}
498		787
499	{	788	fBUF;
500	int errorno = errno;
501	free (buf);
502	errno = errorno;
503	}
504	}	789	}
505		790
506	return res;	791	return res;
		792	}
		793
		794	/* read a full directory */
		795	static int scandir_ (const char *path, void **namesp)
		796	{
		797	DIR *dirp;
		798	union
		799	{
		800	struct dirent d;
		801	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		802	} *u;
		803	struct dirent *entp;
		804	char *name, *names;
		805	int memlen = 4096;
		806	int memofs = 0;
		807	int res = 0;
		808	int errorno;
		809
		810	dirp = opendir (path);
		811	if (!dirp)
		812	return -1;
		813
		814	u = malloc (sizeof (*u));
		815	names = malloc (memlen);
		816
		817	if (u && names)
		818	for (;;)
		819	{
		820	errno = 0;
		821	readdir_r (dirp, &u->d, &entp);
		822
		823	if (!entp)
		824	break;
		825
		826	name = entp->d_name;
		827
		828	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		829	{
		830	int len = strlen (name) + 1;
		831
		832	res++;
		833
		834	while (memofs + len > memlen)
		835	{
		836	memlen *= 2;
		837	names = realloc (names, memlen);
		838	if (!names)
		839	break;
		840	}
		841
		842	memcpy (names + memofs, name, len);
		843	memofs += len;
		844	}
		845	}
		846
		847	errorno = errno;
		848	free (u);
		849	closedir (dirp);
		850
		851	if (errorno)
		852	{
		853	free (names);
		854	errno = errorno;
		855	res = -1;
		856	}
		857
		858	*namesp = (void *)names;
		859	return res;
507	}	860	}
508		861
509	/*****************************************************************************/	862	/*****************************************************************************/
510		863
511	static void *
512	aio_proc (void *thr_arg)	864	static void *aio_proc (void *thr_arg)
513	{	865	{
514	aio_req req;	866	aio_req req;
515	int type;	867	int type;
516		868
517	do	869	do
518	{	870	{
519	pthread_mutex_lock (&reqlock);	871	pthread_mutex_lock (&reqlock);
520		872
521	for (;;)	873	for (;;)
522	{	874	{
523	req = reqs;	875	req = reqq_shift (&req_queue);
524
525	if (reqs)
526	{
527	reqs = reqs->next;
528	if (!reqs) reqe = 0;
529	}
530		876
531	if (req)	877	if (req)
532	break;	878	break;
533		879
534	pthread_cond_wait (&reqwait, &reqlock);	880	pthread_cond_wait (&reqwait, &reqlock);
535	}	881	}
536		882
537	pthread_mutex_unlock (&reqlock);	883	pthread_mutex_unlock (&reqlock);
538		884
539	errno = 0; /* strictly unnecessary */	885	errno = 0; /* strictly unnecessary */
		886	type = req->type; /* remember type for QUIT check */
540		887
541	type = req->type;	888	if (!(req->flags & FLAG_CANCELLED))
542
543	switch (type)	889	switch (type)
544	{	890	{
545	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	891	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;	892	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
547		893
548	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	894	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;	895	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
550		896
551	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	897	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
552	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	898	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
553	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	899	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
554		900
555	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	901	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
556	case REQ_CLOSE: req->result = close (req->fd); break;	902	case REQ_CLOSE: req->result = close (req->fd); break;
557	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	903	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
558	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;	904	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		905	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		906	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
559	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;	907	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
560		908
561	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	909	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
562	case REQ_FSYNC: req->result = fsync (req->fd); break;	910	case REQ_FSYNC: req->result = fsync (req->fd); break;
		911	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
563		912
		913	case REQ_BUSY:
		914	{
		915	struct timeval tv;
		916
		917	tv.tv_sec = req->fd;
		918	tv.tv_usec = req->fd2;
		919
		920	req->result = select (0, 0, 0, 0, &tv);
		921	}
		922
		923	case REQ_GROUP:
		924	case REQ_NOP:
564	case REQ_QUIT:	925	case REQ_QUIT:
565	break;	926	break;
566		927
567	default:	928	default:
568	req->result = ENOSYS;	929	req->result = ENOSYS;
569	break;	930	break;
570	}	931	}
571		932
572	req->errorno = errno;	933	req->errorno = errno;
573		934
574	pthread_mutex_lock (&reslock);	935	pthread_mutex_lock (&reslock);
575		936
576	req->next = 0;	937	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 */	938	/* write a dummy byte to the pipe so fh becomes ready */
588	write (respipe [1], &respipe, 1);	939	write (respipe [1], &respipe, 1);
589	}
590		940
591	pthread_mutex_unlock (&reslock);	941	pthread_mutex_unlock (&reslock);
592	}	942	}
593	while (type != REQ_QUIT);	943	while (type != REQ_QUIT);
594		944
595	return 0;	945	return 0;
		946	}
		947
		948	/*****************************************************************************/
		949
		950	static void atfork_prepare (void)
		951	{
		952	pthread_mutex_lock (&reqlock);
		953	pthread_mutex_lock (&reslock);
		954	#if !HAVE_PREADWRITE
		955	pthread_mutex_lock (&preadwritelock);
		956	#endif
		957	#if !HAVE_READDIR_R
		958	pthread_mutex_lock (&readdirlock);
		959	#endif
		960	}
		961
		962	static void atfork_parent (void)
		963	{
		964	#if !HAVE_READDIR_R
		965	pthread_mutex_unlock (&readdirlock);
		966	#endif
		967	#if !HAVE_PREADWRITE
		968	pthread_mutex_unlock (&preadwritelock);
		969	#endif
		970	pthread_mutex_unlock (&reslock);
		971	pthread_mutex_unlock (&reqlock);
		972	}
		973
		974	static void atfork_child (void)
		975	{
		976	aio_req prv;
		977
		978	started = 0;
		979
		980	while (prv = reqq_shift (&req_queue))
		981	req_free (prv);
		982
		983	while (prv = reqq_shift (&res_queue))
		984	req_free (prv);
		985
		986	close (respipe [0]);
		987	close (respipe [1]);
		988	create_pipe ();
		989
		990	atfork_parent ();
596	}	991	}
597		992
598	#define dREQ \	993	#define dREQ \
599	aio_req req; \	994	aio_req req; \
		995	int req_pri = next_pri; \
		996	next_pri = DEFAULT_PRI + PRI_BIAS; \
600	\	997	\
601	if (SvOK (callback) && !SvROK (callback)) \	998	if (SvOK (callback) && !SvROK (callback)) \
602	croak ("clalback must be undef or of reference type"); \	999	croak ("callback must be undef or of reference type"); \
603	\	1000	\
604	Newz (0, req, 1, aio_cb); \	1001	Newz (0, req, 1, aio_cb); \
605	if (!req) \	1002	if (!req) \
606	croak ("out of memory during aio_req allocation"); \	1003	croak ("out of memory during aio_req allocation"); \
607	\	1004	\
608	req->callback = newSVsv (callback);	1005	req->callback = newSVsv (callback); \
		1006	req->pri = req_pri
		1007
		1008	#define REQ_SEND \
		1009	req_send (req); \
		1010	\
		1011	if (GIMME_V != G_VOID) \
		1012	XPUSHs (req_sv (req, AIO_REQ_KLASS));
609		1013
610	MODULE = IO::AIO PACKAGE = IO::AIO	1014	MODULE = IO::AIO PACKAGE = IO::AIO
611		1015
612	PROTOTYPES: ENABLE	1016	PROTOTYPES: ENABLE
613		1017
614	BOOT:	1018	BOOT:
615	{	1019	{
		1020	HV *stash = gv_stashpv ("IO::AIO", 1);
		1021	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1022	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1023	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		1024
616	create_pipe ();	1025	create_pipe ();
617	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	1026	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
618	}	1027	}
619		1028
620	void	1029	void
621	min_parallel(nthreads)	1030	min_parallel (nthreads)
622	int nthreads	1031	int nthreads
623	PROTOTYPE: $	1032	PROTOTYPE: $
624		1033
625	void	1034	void
626	max_parallel(nthreads)	1035	max_parallel (nthreads)
627	int nthreads	1036	int nthreads
628	PROTOTYPE: $	1037	PROTOTYPE: $
629		1038
630	int	1039	int
631	max_outstanding(nreqs)	1040	max_outstanding (nreqs)
632	int nreqs	1041	int nreqs
633	PROTOTYPE: $	1042	PROTOTYPE: $
634	CODE:	1043	CODE:
635	RETVAL = max_outstanding;	1044	RETVAL = max_outstanding;
636	max_outstanding = nreqs;	1045	max_outstanding = nreqs;
637		1046
638	void	1047	void
639	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1048	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
640	SV * pathname	1049	SV * pathname
641	int flags	1050	int flags
642	int mode	1051	int mode
643	SV * callback	1052	SV * callback
644	PROTOTYPE: $$$;$	1053	PROTOTYPE: $$$;$
645	CODE:	1054	PPCODE:
646	{	1055	{
647	dREQ;	1056	dREQ;
648		1057
649	req->type = REQ_OPEN;	1058	req->type = REQ_OPEN;
650	req->data = newSVsv (pathname);	1059	req->data = newSVsv (pathname);
651	req->dataptr = SvPVbyte_nolen (req->data);	1060	req->dataptr = SvPVbyte_nolen (req->data);
652	req->fd = flags;	1061	req->fd = flags;
653	req->mode = mode;	1062	req->mode = mode;
654		1063
655	send_req (req);	1064	REQ_SEND;
656	}	1065	}
657		1066
658	void	1067	void
659	aio_close(fh,callback=&PL_sv_undef)	1068	aio_close (fh,callback=&PL_sv_undef)
660	SV * fh	1069	SV * fh
661	SV * callback	1070	SV * callback
662	PROTOTYPE: $;$	1071	PROTOTYPE: $;$
663	ALIAS:	1072	ALIAS:
664	aio_close = REQ_CLOSE	1073	aio_close = REQ_CLOSE
665	aio_fsync = REQ_FSYNC	1074	aio_fsync = REQ_FSYNC
666	aio_fdatasync = REQ_FDATASYNC	1075	aio_fdatasync = REQ_FDATASYNC
667	CODE:	1076	PPCODE:
668	{	1077	{
669	dREQ;	1078	dREQ;
670		1079
671	req->type = ix;	1080	req->type = ix;
672	req->fh = newSVsv (fh);	1081	req->fh = newSVsv (fh);
673	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
674		1083
675	send_req (req);	1084	REQ_SEND (req);
676	}	1085	}
677		1086
678	void	1087	void
679	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1088	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
680	SV * fh	1089	SV * fh
681	UV offset	1090	UV offset
682	UV length	1091	UV length
683	SV * data	1092	SV * data
684	UV dataoffset	1093	UV dataoffset
685	SV * callback	1094	SV * callback
686	ALIAS:	1095	ALIAS:
687	aio_read = REQ_READ	1096	aio_read = REQ_READ
688	aio_write = REQ_WRITE	1097	aio_write = REQ_WRITE
689	PROTOTYPE: $$$$$;$	1098	PROTOTYPE: $$$$$;$
690	CODE:	1099	PPCODE:
691	{	1100	{
692	aio_req req;	1101	aio_req req;
693	STRLEN svlen;	1102	STRLEN svlen;
694	char *svptr = SvPVbyte (data, svlen);	1103	char *svptr = SvPVbyte (data, svlen);
695		1104
…		…
733	{	1142	{
734	SvREADONLY_on (data);	1143	SvREADONLY_on (data);
735	req->data2ptr = (void *)data;	1144	req->data2ptr = (void *)data;
736	}	1145	}
737		1146
738	send_req (req);	1147	REQ_SEND;
739	}	1148	}
740	}	1149	}
741		1150
742	void	1151	void
743	aio_sendfile(out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1152	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
744	SV * out_fh	1153	SV * out_fh
745	SV * in_fh	1154	SV * in_fh
746	UV in_offset	1155	UV in_offset
747	UV length	1156	UV length
748	SV * callback	1157	SV * callback
749	PROTOTYPE: $$$$;$	1158	PROTOTYPE: $$$$;$
750	CODE:	1159	PPCODE:
751	{	1160	{
752	dREQ;	1161	dREQ;
753		1162
754	req->type = REQ_SENDFILE;	1163	req->type = REQ_SENDFILE;
755	req->fh = newSVsv (out_fh);	1164	req->fh = newSVsv (out_fh);
…		…
757	req->fh2 = newSVsv (in_fh);	1166	req->fh2 = newSVsv (in_fh);
758	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1167	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
759	req->offset = in_offset;	1168	req->offset = in_offset;
760	req->length = length;	1169	req->length = length;
761		1170
762	send_req (req);	1171	REQ_SEND;
763	}	1172	}
764		1173
765	void	1174	void
766	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1175	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
767	SV * fh	1176	SV * fh
768	UV offset	1177	UV offset
769	IV length	1178	IV length
770	SV * callback	1179	SV * callback
771	PROTOTYPE: $$$;$	1180	PROTOTYPE: $$$;$
772	CODE:	1181	PPCODE:
773	{	1182	{
774	dREQ;	1183	dREQ;
775		1184
776	req->type = REQ_READAHEAD;	1185	req->type = REQ_READAHEAD;
777	req->fh = newSVsv (fh);	1186	req->fh = newSVsv (fh);
778	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1187	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
779	req->offset = offset;	1188	req->offset = offset;
780	req->length = length;	1189	req->length = length;
781		1190
782	send_req (req);	1191	REQ_SEND;
783	}	1192	}
784		1193
785	void	1194	void
786	aio_stat(fh_or_path,callback=&PL_sv_undef)	1195	aio_stat (fh_or_path,callback=&PL_sv_undef)
787	SV * fh_or_path	1196	SV * fh_or_path
788	SV * callback	1197	SV * callback
789	ALIAS:	1198	ALIAS:
790	aio_stat = REQ_STAT	1199	aio_stat = REQ_STAT
791	aio_lstat = REQ_LSTAT	1200	aio_lstat = REQ_LSTAT
792	CODE:	1201	PPCODE:
793	{	1202	{
794	dREQ;	1203	dREQ;
795		1204
796	New (0, req->statdata, 1, Stat_t);	1205	New (0, req->statdata, 1, Stat_t);
797	if (!req->statdata)	1206	if (!req->statdata)
798	{	1207	{
799	free_req (req);	1208	req_free (req);
800	croak ("out of memory during aio_req->statdata allocation");	1209	croak ("out of memory during aio_req->statdata allocation");
801	}	1210	}
802		1211
803	if (SvPOK (fh_or_path))	1212	if (SvPOK (fh_or_path))
804	{	1213	{
…		…
811	req->type = REQ_FSTAT;	1220	req->type = REQ_FSTAT;
812	req->fh = newSVsv (fh_or_path);	1221	req->fh = newSVsv (fh_or_path);
813	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1222	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
814	}	1223	}
815		1224
816	send_req (req);	1225	REQ_SEND;
817	}	1226	}
818		1227
819	void	1228	void
820	aio_unlink(pathname,callback=&PL_sv_undef)	1229	aio_unlink (pathname,callback=&PL_sv_undef)
821	SV * pathname	1230	SV * pathname
822	SV * callback	1231	SV * callback
823	ALIAS:	1232	ALIAS:
824	aio_unlink = REQ_UNLINK	1233	aio_unlink = REQ_UNLINK
825	aio_rmdir = REQ_RMDIR	1234	aio_rmdir = REQ_RMDIR
		1235	aio_readdir = REQ_READDIR
826	CODE:	1236	PPCODE:
827	{	1237	{
828	dREQ;	1238	dREQ;
829		1239
830	req->type = ix;	1240	req->type = ix;
831	req->data = newSVsv (pathname);	1241	req->data = newSVsv (pathname);
832	req->dataptr = SvPVbyte_nolen (req->data);	1242	req->dataptr = SvPVbyte_nolen (req->data);
833		1243
834	send_req (req);	1244	REQ_SEND;
835	}	1245	}
836		1246
837	void	1247	void
838	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1248	aio_link (oldpath,newpath,callback=&PL_sv_undef)
839	SV * oldpath	1249	SV * oldpath
840	SV * newpath	1250	SV * newpath
841	SV * callback	1251	SV * callback
		1252	ALIAS:
		1253	aio_link = REQ_LINK
		1254	aio_symlink = REQ_SYMLINK
		1255	aio_rename = REQ_RENAME
842	CODE:	1256	PPCODE:
843	{	1257	{
844	dREQ;	1258	dREQ;
845		1259
846	req->type = REQ_SYMLINK;	1260	req->type = ix;
847	req->fh = newSVsv (oldpath);	1261	req->fh = newSVsv (oldpath);
848	req->data2ptr = SvPVbyte_nolen (req->fh);	1262	req->data2ptr = SvPVbyte_nolen (req->fh);
849	req->data = newSVsv (newpath);	1263	req->data = newSVsv (newpath);
850	req->dataptr = SvPVbyte_nolen (req->data);	1264	req->dataptr = SvPVbyte_nolen (req->data);
851		1265
852	send_req (req);	1266	REQ_SEND;
853	}	1267	}
854		1268
855	void	1269	void
		1270	aio_busy (delay,callback=&PL_sv_undef)
		1271	double delay
		1272	SV * callback
		1273	PPCODE:
		1274	{
		1275	dREQ;
		1276
		1277	req->type = REQ_BUSY;
		1278	req->fd = delay < 0. ? 0 : delay;
		1279	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1280
		1281	REQ_SEND;
		1282	}
		1283
		1284	void
		1285	aio_group (callback=&PL_sv_undef)
		1286	SV * callback
		1287	PROTOTYPE: ;$
		1288	PPCODE:
		1289	{
		1290	dREQ;
		1291
		1292	req->type = REQ_GROUP;
		1293	req_send (req);
		1294
		1295	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1296	}
		1297
		1298	void
		1299	aio_nop (callback=&PL_sv_undef)
		1300	SV * callback
		1301	PPCODE:
		1302	{
		1303	dREQ;
		1304
		1305	req->type = REQ_NOP;
		1306
		1307	REQ_SEND;
		1308	}
		1309
		1310	void
		1311	aioreq_pri (int pri = DEFAULT_PRI)
		1312	CODE:
		1313	if (pri < PRI_MIN) pri = PRI_MIN;
		1314	if (pri > PRI_MAX) pri = PRI_MAX;
		1315	next_pri = pri + PRI_BIAS;
		1316
		1317	void
		1318	aioreq_nice (int nice = 0)
		1319	CODE:
		1320	nice = next_pri - nice;
		1321	if (nice < PRI_MIN) nice = PRI_MIN;
		1322	if (nice > PRI_MAX) nice = PRI_MAX;
		1323	next_pri = nice + PRI_BIAS;
		1324
		1325	void
856	flush()	1326	flush ()
857	PROTOTYPE:	1327	PROTOTYPE:
858	CODE:	1328	CODE:
859	while (nreqs)	1329	while (nreqs)
860	{	1330	{
861	poll_wait ();	1331	poll_wait ();
…		…
901	CODE:	1371	CODE:
902	RETVAL = nreqs;	1372	RETVAL = nreqs;
903	OUTPUT:	1373	OUTPUT:
904	RETVAL	1374	RETVAL
905		1375
		1376	PROTOTYPES: DISABLE
		1377
		1378	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1379
		1380	void
		1381	cancel (aio_req_ornot req)
		1382	CODE:
		1383	req_cancel (req);
		1384
		1385	void
		1386	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1387	CODE:
		1388	SvREFCNT_dec (req->callback);
		1389	req->callback = newSVsv (callback);
		1390
		1391	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1392
		1393	void
		1394	add (aio_req grp, ...)
		1395	PPCODE:
		1396	{
		1397	int i;
		1398	aio_req req;
		1399
		1400	if (grp->fd == 2)
		1401	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1402
		1403	for (i = 1; i < items; ++i )
		1404	{
		1405	if (GIMME_V != G_VOID)
		1406	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1407
		1408	req = SvAIO_REQ (ST (i));
		1409
		1410	if (req)
		1411	{
		1412	++grp->length;
		1413	req->grp = grp;
		1414
		1415	req->grp_prev = 0;
		1416	req->grp_next = grp->grp_first;
		1417
		1418	if (grp->grp_first)
		1419	grp->grp_first->grp_prev = req;
		1420
		1421	grp->grp_first = req;
		1422	}
		1423	}
		1424	}
		1425
		1426	void
		1427	result (aio_req grp, ...)
		1428	CODE:
		1429	{
		1430	int i;
		1431	AV *av = newAV ();
		1432
		1433	for (i = 1; i < items; ++i )
		1434	av_push (av, newSVsv (ST (i)));
		1435
		1436	SvREFCNT_dec (grp->data);
		1437	grp->data = (SV *)av;
		1438	}
		1439
		1440	void
		1441	limit (aio_req grp, int limit)
		1442	CODE:
		1443	grp->fd2 = limit;
		1444	aio_grp_feed (grp);
		1445
		1446	void
		1447	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1448	CODE:
		1449	{
		1450	SvREFCNT_dec (grp->fh2);
		1451	grp->fh2 = newSVsv (callback);
		1452
		1453	if (grp->fd2 <= 0)
		1454	grp->fd2 = 2;
		1455
		1456	aio_grp_feed (grp);
		1457	}
		1458

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