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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.16 by root, Sun Jul 31 18:20:07 2005 UTC vs.
Revision 1.68 by root, Tue Oct 24 03:40:25 2006 UTC

		1	#if __linux
		2	# define _GNU_SOURCE
		3	#endif
		4
		5	#define _REENTRANT 1
		6
		7	#include <errno.h>
		8
1	#include "EXTERN.h"	9	#include "EXTERN.h"
2	#include "perl.h"	10	#include "perl.h"
3	#include "XSUB.h"	11	#include "XSUB.h"
4		12
5	#include "autoconf/config.h"	13	#include "autoconf/config.h"
6		14
		15	#include <pthread.h>
		16
		17	#include <stddef.h>
		18	#include <errno.h>
		19	#include <sys/time.h>
		20	#include <sys/select.h>
7	#include <sys/types.h>	21	#include <sys/types.h>
8	#include <sys/stat.h>	22	#include <sys/stat.h>
9		23	#include <limits.h>
10	#include <unistd.h>	24	#include <unistd.h>
11	#include <fcntl.h>	25	#include <fcntl.h>
12	#include <signal.h>	26	#include <signal.h>
13	#include <sched.h>	27	#include <sched.h>
14		28
15	#include <pthread.h>	29	#if HAVE_SENDFILE
		30	# if __linux
		31	# include <sys/sendfile.h>
		32	# elif __freebsd
		33	# include <sys/socket.h>
		34	# include <sys/uio.h>
		35	# elif __hpux
		36	# include <sys/socket.h>
		37	# elif __solaris /* not yet */
		38	# include <sys/sendfile.h>
		39	# else
		40	# error sendfile support requested but not available
		41	# endif
		42	#endif
16		43
17	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	44	/* used for struct dirent, AIX doesn't provide it */
18	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	45	#ifndef NAME_MAX
19	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	46	# define NAME_MAX 4096
		47	#endif
20		48
21	#if __ia64	49	#if __ia64
22	# define STACKSIZE 65536	50	# define STACKSIZE 65536
		51	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		52	# define STACKSIZE PTHREAD_STACK_MIN
23	#else	53	#else
24	# define STACKSIZE 4096	54	# define STACKSIZE 16384
25	#endif	55	#endif
		56
		57	/* buffer size for various temporary buffers */
		58	#define AIO_BUFSIZE 65536
		59
		60	#define dBUF \
		61	char *aio_buf = malloc (AIO_BUFSIZE); \
		62	if (!aio_buf) \
		63	return -1;
		64
		65	#define fBUF free (aio_buf)
26		66
27	enum {	67	enum {
28	REQ_QUIT,	68	REQ_QUIT,
29	REQ_OPEN, REQ_CLOSE,	69	REQ_OPEN, REQ_CLOSE,
30	REQ_READ, REQ_WRITE, REQ_READAHEAD,	70	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		71	REQ_SENDFILE,
31	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	72	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
32	REQ_FSYNC, REQ_FDATASYNC,	73	REQ_FSYNC, REQ_FDATASYNC,
		74	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
		75	REQ_READDIR,
		76	REQ_LINK, REQ_SYMLINK,
		77	REQ_GROUP, REQ_NOP,
		78	REQ_SLEEP,
33	};	79	};
34		80
		81	#define AIO_REQ_KLASS "IO::AIO::REQ"
		82	#define AIO_GRP_KLASS "IO::AIO::GRP"
		83
35	typedef struct aio_cb {	84	typedef struct aio_cb
		85	{
36	struct aio_cb *volatile next;	86	struct aio_cb *volatile next;
37		87
38	int type;	88	SV *data, *callback;
39		89	SV *fh, *fh2;
40	int fd;	90	void *dataptr, *data2ptr;
		91	Stat_t *statdata;
41	off_t offset;	92	off_t offset;
42	size_t length;	93	size_t length;
43	ssize_t result;	94	ssize_t result;
		95
		96	STRLEN dataoffset;
		97	int type;
		98	int fd, fd2;
		99	int errorno;
44	mode_t mode; /* open */	100	mode_t mode; /* open */
45	int errorno;
46	SV *data, *callback, *fh;
47	void *dataptr;
48	STRLEN dataoffset;
49		101
50	Stat_t *statdata;	102	unsigned char flags;
		103	unsigned char pri;
		104
		105	SV *self; /* the perl counterpart of this request, if any */
		106	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
51	} aio_cb;	107	} aio_cb;
52		108
		109	enum {
		110	FLAG_CANCELLED = 0x01,
		111	};
		112
53	typedef aio_cb *aio_req;	113	typedef aio_cb *aio_req;
		114	typedef aio_cb *aio_req_ornot;
54		115
		116	enum {
		117	PRI_MIN = -4,
		118	PRI_MAX = 4,
		119
		120	DEFAULT_PRI = 0,
		121	PRI_BIAS = -PRI_MIN,
		122	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
		123	};
		124
		125	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		126
55	static int started;	127	static int started, wanted;
56	static volatile int nreqs;	128	static volatile int nreqs;
57	static int max_outstanding = 1<<30;	129	static int max_outstanding = 1<<30;
58	static int respipe [2];	130	static int respipe [2];
59		131
		132	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		133	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		134	#else
		135	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		136	#endif
		137
60	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	138	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
61	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	139	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
62	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	140	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
63		141
64	static volatile aio_req reqs, reqe; /* queue start, queue end */	142	/*
65	static volatile aio_req ress, rese; /* queue start, queue end */	143	* a somewhat faster data structure might be nice, but
		144	* with 8 priorities this actually needs <20 insns
		145	* per shift, the most expensive operation.
		146	*/
		147	typedef struct {
		148	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
		149	int size;
		150	} reqq;
66		151
67	static void	152	static reqq req_queue;
68	poll_wait ()	153	static reqq res_queue;
		154
		155	int reqq_push (reqq *q, aio_req req)
69	{	156	{
70	if (nreqs && !ress)	157	int pri = req->pri;
		158	req->next = 0;
		159
		160	if (q->qe[pri])
		161	{
		162	q->qe[pri]->next = req;
		163	q->qe[pri] = req;
71	{	164	}
		165	else
		166	q->qe[pri] = q->qs[pri] = req;
		167
		168	return q->size++;
		169	}
		170
		171	aio_req reqq_shift (reqq *q)
		172	{
		173	int pri;
		174
		175	if (!q->size)
		176	return 0;
		177
		178	--q->size;
		179
		180	for (pri = NUM_PRI; pri--; )
		181	{
		182	aio_req req = q->qs[pri];
		183
		184	if (req)
		185	{
		186	if (!(q->qs[pri] = req->next))
		187	q->qe[pri] = 0;
		188
		189	return req;
		190	}
		191	}
		192
		193	abort ();
		194	}
		195
		196	static void req_invoke (aio_req req);
		197	static void req_free (aio_req req);
		198
		199	/* must be called at most once */
		200	static SV *req_sv (aio_req req, const char *klass)
		201	{
		202	if (!req->self)
		203	{
		204	req->self = (SV *)newHV ();
		205	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		206	}
		207
		208	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		209	}
		210
		211	static aio_req SvAIO_REQ (SV *sv)
		212	{
		213	MAGIC *mg;
		214
		215	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		216	croak ("object of class " AIO_REQ_KLASS " expected");
		217
		218	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		219
		220	return mg ? (aio_req)mg->mg_ptr : 0;
		221	}
		222
		223	static void aio_grp_feed (aio_req grp)
		224	{
		225	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
		226	{
		227	int old_len = grp->length;
		228
		229	if (grp->fh2 && SvOK (grp->fh2))
		230	{
		231	dSP;
		232
		233	ENTER;
		234	SAVETMPS;
		235	PUSHMARK (SP);
		236	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		237	PUTBACK;
		238	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);
		239	SPAGAIN;
		240	FREETMPS;
		241	LEAVE;
		242	}
		243
		244	/* stop if no progress has been made */
		245	if (old_len == grp->length)
		246	{
		247	SvREFCNT_dec (grp->fh2);
		248	grp->fh2 = 0;
		249	break;
		250	}
		251	}
		252	}
		253
		254	static void aio_grp_dec (aio_req grp)
		255	{
		256	--grp->length;
		257
		258	/* call feeder, if applicable */
		259	aio_grp_feed (grp);
		260
		261	/* finish, if done */
		262	if (!grp->length && grp->fd)
		263	{
		264	req_invoke (grp);
		265	req_free (grp);
		266	}
		267	}
		268
		269	static void poll_wait ()
		270	{
72	fd_set rfd;	271	fd_set rfd;
		272
		273	while (nreqs)
		274	{
		275	int size;
		276	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
		277	pthread_mutex_lock (&reslock);
		278	#endif
		279	size = res_queue.size;
		280	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
		281	pthread_mutex_unlock (&reslock);
		282	#endif
		283
		284	if (size)
		285	return;
		286
73	FD_ZERO(&rfd);	287	FD_ZERO(&rfd);
74	FD_SET(respipe [0], &rfd);	288	FD_SET(respipe [0], &rfd);
75		289
76	select (respipe [0] + 1, &rfd, 0, 0, 0);	290	select (respipe [0] + 1, &rfd, 0, 0, 0);
77	}	291	}
78	}	292	}
79		293
80	static int	294	static void req_invoke (aio_req req)
81	poll_cb ()	295	{
		296	dSP;
		297
		298	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
		299	{
		300	errno = req->errorno;
		301
		302	ENTER;
		303	SAVETMPS;
		304	PUSHMARK (SP);
		305	EXTEND (SP, 1);
		306
		307	switch (req->type)
		308	{
		309	case REQ_READDIR:
		310	{
		311	SV *rv = &PL_sv_undef;
		312
		313	if (req->result >= 0)
		314	{
		315	char *buf = req->data2ptr;
		316	AV *av = newAV ();
		317
		318	while (req->result)
		319	{
		320	SV *sv = newSVpv (buf, 0);
		321
		322	av_push (av, sv);
		323	buf += SvCUR (sv) + 1;
		324	req->result--;
		325	}
		326
		327	rv = sv_2mortal (newRV_noinc ((SV *)av));
		328	}
		329
		330	PUSHs (rv);
		331	}
		332	break;
		333
		334	case REQ_OPEN:
		335	{
		336	/* convert fd to fh */
		337	SV *fh;
		338
		339	PUSHs (sv_2mortal (newSViv (req->result)));
		340	PUTBACK;
		341	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		342	SPAGAIN;
		343
		344	fh = SvREFCNT_inc (POPs);
		345
		346	PUSHMARK (SP);
		347	XPUSHs (sv_2mortal (fh));
		348	}
		349	break;
		350
		351	case REQ_GROUP:
		352	req->fd = 2; /* mark group as finished */
		353
		354	if (req->data)
		355	{
		356	int i;
		357	AV *av = (AV *)req->data;
		358
		359	EXTEND (SP, AvFILL (av) + 1);
		360	for (i = 0; i <= AvFILL (av); ++i)
		361	PUSHs (*av_fetch (av, i, 0));
		362	}
		363	break;
		364
		365	case REQ_NOP:
		366	case REQ_SLEEP:
		367	break;
		368
		369	default:
		370	PUSHs (sv_2mortal (newSViv (req->result)));
		371	break;
		372	}
		373
		374
		375	PUTBACK;
		376	call_sv (req->callback, G_VOID | G_EVAL);
		377	SPAGAIN;
		378
		379	FREETMPS;
		380	LEAVE;
		381	}
		382
		383	if (req->grp)
		384	{
		385	aio_req grp = req->grp;
		386
		387	/* unlink request */
		388	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		389	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		390
		391	if (grp->grp_first == req)
		392	grp->grp_first = req->grp_next;
		393
		394	aio_grp_dec (grp);
		395	}
		396
		397	if (SvTRUE (ERRSV))
		398	{
		399	req_free (req);
		400	croak (0);
		401	}
		402	}
		403
		404	static void req_free (aio_req req)
		405	{
		406	if (req->self)
		407	{
		408	sv_unmagic (req->self, PERL_MAGIC_ext);
		409	SvREFCNT_dec (req->self);
		410	}
		411
		412	SvREFCNT_dec (req->data);
		413	SvREFCNT_dec (req->fh);
		414	SvREFCNT_dec (req->fh2);
		415	SvREFCNT_dec (req->callback);
		416	Safefree (req->statdata);
		417
		418	if (req->type == REQ_READDIR && req->result >= 0)
		419	free (req->data2ptr);
		420
		421	Safefree (req);
		422	}
		423
		424	static void req_cancel (aio_req req)
		425	{
		426	req->flags |= FLAG_CANCELLED;
		427
		428	if (req->type == REQ_GROUP)
		429	{
		430	aio_req sub;
		431
		432	for (sub = req->grp_first; sub; sub = sub->grp_next)
		433	req_cancel (sub);
		434	}
		435	}
		436
		437	static int poll_cb ()
82	{	438	{
83	dSP;	439	dSP;
84	int count = 0;	440	int count = 0;
		441	int do_croak = 0;
85	aio_req req, prv;	442	aio_req req;
86		443
		444	for (;;)
		445	{
87	pthread_mutex_lock (&reslock);	446	pthread_mutex_lock (&reslock);
		447	req = reqq_shift (&res_queue);
88		448
89	{	449	if (req)
		450	{
		451	if (!res_queue.size)
		452	{
90	/* read any signals sent by the worker threads */	453	/* read any signals sent by the worker threads */
91	char buf [32];	454	char buf [32];
92	while (read (respipe [0], buf, 32) > 0)	455	while (read (respipe [0], buf, 32) == 32)
		456	;
		457	}
93	;	458	}
94	}
95		459
96	req = ress;
97	ress = rese = 0;
98
99	pthread_mutex_unlock (&reslock);	460	pthread_mutex_unlock (&reslock);
100		461
101	while (req)	462	if (!req)
102	{	463	break;
		464
103	nreqs--;	465	--nreqs;
104		466
105	if (req->type == REQ_QUIT)	467	if (req->type == REQ_QUIT)
106	started--;	468	started--;
		469	else if (req->type == REQ_GROUP && req->length)
		470	{
		471	req->fd = 1; /* mark request as delayed */
		472	continue;
		473	}
107	else	474	else
108	{	475	{
109	int errorno = errno;
110	errno = req->errorno;
111
112	if (req->type == REQ_READ)	476	if (req->type == REQ_READ)
113	SvCUR_set (req->data, req->dataoffset	477	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
114	+ req->result > 0 ? req->result : 0);
115		478
		479	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		480	SvREADONLY_off (req->data);
		481
116	if (req->data)	482	if (req->statdata)
117	SvREFCNT_dec (req->data);
118
119	if (req->fh)
120	SvREFCNT_dec (req->fh);
121
122	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
123	{	483	{
124	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	484	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
125	PL_laststatval = req->result;	485	PL_laststatval = req->result;
126	PL_statcache = *(req->statdata);	486	PL_statcache = *(req->statdata);
127
128	Safefree (req->statdata);
129	}	487	}
130		488
131	ENTER;	489	req_invoke (req);
132	PUSHMARK (SP);
133	XPUSHs (sv_2mortal (newSViv (req->result)));
134		490
135	if (req->type == REQ_OPEN)
136	{
137	/* convert fd to fh */
138	SV *fh;
139
140	PUTBACK;
141	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
142	SPAGAIN;
143
144	fh = SvREFCNT_inc (POPs);
145
146	PUSHMARK (SP);
147	XPUSHs (sv_2mortal (fh));
148	}
149
150	if (SvOK (req->callback))
151	{
152	PUTBACK;
153	call_sv (req->callback, G_VOID | G_EVAL);
154	SPAGAIN;
155	}
156
157	LEAVE;
158
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161
162	errno = errorno;
163	count++;	491	count++;
164	}	492	}
165		493
166	prv = req;
167	req = req->next;
168	Safefree (prv);	494	req_free (req);
169
170	/* TODO: croak on errors? */
171	}	495	}
172		496
173	return count;	497	return count;
174	}	498	}
175		499
176	static void *aio_proc(void *arg);	500	static void *aio_proc(void *arg);
177		501
178	static void
179	start_thread (void)	502	static void start_thread (void)
180	{	503	{
181	sigset_t fullsigset, oldsigset;	504	sigset_t fullsigset, oldsigset;
182	pthread_t tid;	505	pthread_t tid;
183	pthread_attr_t attr;	506	pthread_attr_t attr;
184		507
…		…
193	started++;	516	started++;
194		517
195	sigprocmask (SIG_SETMASK, &oldsigset, 0);	518	sigprocmask (SIG_SETMASK, &oldsigset, 0);
196	}	519	}
197		520
198	static void	521	static void req_send (aio_req req)
199	send_req (aio_req req)
200	{	522	{
		523	while (started < wanted && nreqs >= started)
		524	start_thread ();
		525
201	nreqs++;	526	++nreqs;
202		527
203	pthread_mutex_lock (&reqlock);	528	pthread_mutex_lock (&reqlock);
204		529	reqq_push (&req_queue, req);
205	req->next = 0;
206
207	if (reqe)
208	{
209	reqe->next = req;
210	reqe = req;
211	}
212	else
213	reqe = reqs = req;
214
215	pthread_cond_signal (&reqwait);	530	pthread_cond_signal (&reqwait);
216	pthread_mutex_unlock (&reqlock);	531	pthread_mutex_unlock (&reqlock);
217		532
218	while (nreqs > max_outstanding)	533	if (nreqs > max_outstanding)
		534	for (;;)
		535	{
		536	poll_cb ();
		537
		538	if (nreqs <= max_outstanding)
		539	break;
		540
		541	poll_wait ();
		542	}
		543	}
		544
		545	static void end_thread (void)
		546	{
		547	aio_req req;
		548
		549	Newz (0, req, 1, aio_cb);
		550
		551	req->type = REQ_QUIT;
		552	req->pri = PRI_MAX + PRI_BIAS;
		553
		554	req_send (req);
		555	}
		556
		557	static void min_parallel (int nthreads)
		558	{
		559	if (wanted < nthreads)
		560	wanted = nthreads;
		561	}
		562
		563	static void max_parallel (int nthreads)
		564	{
		565	int cur = started;
		566
		567	if (wanted > nthreads)
		568	wanted = nthreads;
		569
		570	while (cur > wanted)
		571	{
		572	end_thread ();
		573	cur--;
		574	}
		575
		576	while (started > wanted)
219	{	577	{
220	poll_wait ();	578	poll_wait ();
221	poll_cb ();	579	poll_cb ();
222	}	580	}
223	}	581	}
224		582
225	static void	583	static void create_pipe ()
226	end_thread (void)
227	{	584	{
228	aio_req req;	585	if (pipe (respipe))
229	New (0, req, 1, aio_cb);	586	croak ("unable to initialize result pipe");
230	req->type = REQ_QUIT;
231		587
232	send_req (req);	588	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
233	}	589	croak ("cannot set result pipe to nonblocking mode");
234		590
235	static void *	591	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		592	croak ("cannot set result pipe to nonblocking mode");
		593	}
		594
		595	/*****************************************************************************/
		596	/* work around various missing functions */
		597
		598	#if !HAVE_PREADWRITE
		599	# define pread aio_pread
		600	# define pwrite aio_pwrite
		601
		602	/*
		603	* make our pread/pwrite safe against themselves, but not against
		604	* normal read/write by using a mutex. slows down execution a lot,
		605	* but that's your problem, not mine.
		606	*/
		607	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		608
		609	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
		610	{
		611	ssize_t res;
		612	off_t ooffset;
		613
		614	pthread_mutex_lock (&preadwritelock);
		615	ooffset = lseek (fd, 0, SEEK_CUR);
		616	lseek (fd, offset, SEEK_SET);
		617	res = read (fd, buf, count);
		618	lseek (fd, ooffset, SEEK_SET);
		619	pthread_mutex_unlock (&preadwritelock);
		620
		621	return res;
		622	}
		623
		624	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
		625	{
		626	ssize_t res;
		627	off_t ooffset;
		628
		629	pthread_mutex_lock (&preadwritelock);
		630	ooffset = lseek (fd, 0, SEEK_CUR);
		631	lseek (fd, offset, SEEK_SET);
		632	res = write (fd, buf, count);
		633	lseek (fd, offset, SEEK_SET);
		634	pthread_mutex_unlock (&preadwritelock);
		635
		636	return res;
		637	}
		638	#endif
		639
		640	#if !HAVE_FDATASYNC
		641	# define fdatasync fsync
		642	#endif
		643
		644	#if !HAVE_READAHEAD
		645	# define readahead aio_readahead
		646
		647	static ssize_t readahead (int fd, off_t offset, size_t count)
		648	{
		649	dBUF;
		650
		651	while (count > 0)
		652	{
		653	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
		654
		655	pread (fd, aio_buf, len, offset);
		656	offset += len;
		657	count -= len;
		658	}
		659
		660	fBUF;
		661
		662	errno = 0;
		663	}
		664	#endif
		665
		666	#if !HAVE_READDIR_R
		667	# define readdir_r aio_readdir_r
		668
		669	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		670
		671	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		672	{
		673	struct dirent *e;
		674	int errorno;
		675
		676	pthread_mutex_lock (&readdirlock);
		677
		678	e = readdir (dirp);
		679	errorno = errno;
		680
		681	if (e)
		682	{
		683	*res = ent;
		684	strcpy (ent->d_name, e->d_name);
		685	}
		686	else
		687	*res = 0;
		688
		689	pthread_mutex_unlock (&readdirlock);
		690
		691	errno = errorno;
		692	return e ? 0 : -1;
		693	}
		694	#endif
		695
		696	/* sendfile always needs emulation */
		697	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		698	{
		699	ssize_t res;
		700
		701	if (!count)
		702	return 0;
		703
		704	#if HAVE_SENDFILE
		705	# if __linux
		706	res = sendfile (ofd, ifd, &offset, count);
		707
		708	# elif __freebsd
		709	/*
		710	* Of course, the freebsd sendfile is a dire hack with no thoughts
		711	* wasted on making it similar to other I/O functions.
		712	*/
		713	{
		714	off_t sbytes;
		715	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		716
		717	if (res < 0 && sbytes)
		718	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		719	res = sbytes;
		720	}
		721
		722	# elif __hpux
		723	res = sendfile (ofd, ifd, offset, count, 0, 0);
		724
		725	# elif __solaris
		726	{
		727	struct sendfilevec vec;
		728	size_t sbytes;
		729
		730	vec.sfv_fd = ifd;
		731	vec.sfv_flag = 0;
		732	vec.sfv_off = offset;
		733	vec.sfv_len = count;
		734
		735	res = sendfilev (ofd, &vec, 1, &sbytes);
		736
		737	if (res < 0 && sbytes)
		738	res = sbytes;
		739	}
		740
		741	# endif
		742	#else
		743	res = -1;
		744	errno = ENOSYS;
		745	#endif
		746
		747	if (res < 0
		748	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		749	#if __solaris
		750	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		751	#endif
		752	)
		753	)
		754	{
		755	/* emulate sendfile. this is a major pain in the ass */
		756	dBUF;
		757
		758	res = 0;
		759
		760	while (count)
		761	{
		762	ssize_t cnt;
		763
		764	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		765
		766	if (cnt <= 0)
		767	{
		768	if (cnt && !res) res = -1;
		769	break;
		770	}
		771
		772	cnt = write (ofd, aio_buf, cnt);
		773
		774	if (cnt <= 0)
		775	{
		776	if (cnt && !res) res = -1;
		777	break;
		778	}
		779
		780	offset += cnt;
		781	res += cnt;
		782	count -= cnt;
		783	}
		784
		785	fBUF;
		786	}
		787
		788	return res;
		789	}
		790
		791	/* read a full directory */
		792	static int scandir_ (const char *path, void **namesp)
		793	{
		794	DIR *dirp;
		795	union
		796	{
		797	struct dirent d;
		798	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		799	} *u;
		800	struct dirent *entp;
		801	char *name, *names;
		802	int memlen = 4096;
		803	int memofs = 0;
		804	int res = 0;
		805	int errorno;
		806
		807	dirp = opendir (path);
		808	if (!dirp)
		809	return -1;
		810
		811	u = malloc (sizeof (*u));
		812	names = malloc (memlen);
		813
		814	if (u && names)
		815	for (;;)
		816	{
		817	errno = 0;
		818	readdir_r (dirp, &u->d, &entp);
		819
		820	if (!entp)
		821	break;
		822
		823	name = entp->d_name;
		824
		825	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		826	{
		827	int len = strlen (name) + 1;
		828
		829	res++;
		830
		831	while (memofs + len > memlen)
		832	{
		833	memlen *= 2;
		834	names = realloc (names, memlen);
		835	if (!names)
		836	break;
		837	}
		838
		839	memcpy (names + memofs, name, len);
		840	memofs += len;
		841	}
		842	}
		843
		844	errorno = errno;
		845	free (u);
		846	closedir (dirp);
		847
		848	if (errorno)
		849	{
		850	free (names);
		851	errno = errorno;
		852	res = -1;
		853	}
		854
		855	*namesp = (void *)names;
		856	return res;
		857	}
		858
		859	/*****************************************************************************/
		860
236	aio_proc (void *thr_arg)	861	static void *aio_proc (void *thr_arg)
237	{	862	{
238	aio_req req;	863	aio_req req;
239	int type;	864	int type;
240		865
241	do	866	do
242	{	867	{
243	pthread_mutex_lock (&reqlock);	868	pthread_mutex_lock (&reqlock);
244		869
245	for (;;)	870	for (;;)
246	{	871	{
247	req = reqs;	872	req = reqq_shift (&req_queue);
248
249	if (reqs)
250	{
251	reqs = reqs->next;
252	if (!reqs) reqe = 0;
253	}
254		873
255	if (req)	874	if (req)
256	break;	875	break;
257		876
258	pthread_cond_wait (&reqwait, &reqlock);	877	pthread_cond_wait (&reqwait, &reqlock);
259	}	878	}
260		879
261	pthread_mutex_unlock (&reqlock);	880	pthread_mutex_unlock (&reqlock);
262		881
263	errno = 0; /* strictly unnecessary */	882	errno = 0; /* strictly unnecessary */
		883	type = req->type; /* remember type for QUIT check */
264		884
265	type = req->type;	885	if (!(req->flags & FLAG_CANCELLED))
266
267	switch (type)	886	switch (type)
268	{	887	{
269	#if HAVE_PREADWRITE
270	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;	888	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
271	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;	889	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
272	#else
273	# error "pread/pwrite cannot be emulated, fix your os"
274	#endif
275		890
276	#if HAVE_READAHEAD
277	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;	891	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
278	#else	892	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
279	// TODO: emulate
280	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
281	#endif
282		893
283	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	894	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
284	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	895	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
285	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	896	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
286		897
287	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	898	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
288	case REQ_CLOSE: req->result = close (req->fd); break;	899	case REQ_CLOSE: req->result = close (req->fd); break;
289	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	900	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		901	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		902	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		903	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
		904	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
290		905
291	case REQ_FDATASYNC:
292	#if HAVE_FDATASYNC
293	req->result = fdatasync (req->fd); break;	906	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
294	#endif
295	case REQ_FSYNC: req->result = fsync (req->fd); break;	907	case REQ_FSYNC: req->result = fsync (req->fd); break;
		908	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
296		909
		910	case REQ_SLEEP:
		911	{
		912	struct timeval tv;
		913
		914	tv.tv_sec = req->fd;
		915	tv.tv_usec = req->fd2;
		916
		917	req->result = select (0, 0, 0, 0, &tv);
		918	}
		919
		920	case REQ_GROUP:
		921	case REQ_NOP:
297	case REQ_QUIT:	922	case REQ_QUIT:
298	break;	923	break;
299		924
300	default:	925	default:
301	req->result = ENOSYS;	926	req->result = ENOSYS;
302	break;	927	break;
303	}	928	}
304		929
305	req->errorno = errno;	930	req->errorno = errno;
306		931
307	pthread_mutex_lock (&reslock);	932	pthread_mutex_lock (&reslock);
308		933
309	req->next = 0;	934	if (!reqq_push (&res_queue, req))
310
311	if (rese)
312	{
313	rese->next = req;
314	rese = req;
315	}
316	else
317	{
318	rese = ress = req;
319
320	/* write a dummy byte to the pipe so fh becomes ready */	935	/* write a dummy byte to the pipe so fh becomes ready */
321	write (respipe [1], &respipe, 1);	936	write (respipe [1], &respipe, 1);
322	}
323		937
324	pthread_mutex_unlock (&reslock);	938	pthread_mutex_unlock (&reslock);
325	}	939	}
326	while (type != REQ_QUIT);	940	while (type != REQ_QUIT);
327		941
328	return 0;	942	return 0;
329	}	943	}
330		944
		945	/*****************************************************************************/
		946
		947	static void atfork_prepare (void)
		948	{
		949	pthread_mutex_lock (&reqlock);
		950	pthread_mutex_lock (&reslock);
		951	#if !HAVE_PREADWRITE
		952	pthread_mutex_lock (&preadwritelock);
		953	#endif
		954	#if !HAVE_READDIR_R
		955	pthread_mutex_lock (&readdirlock);
		956	#endif
		957	}
		958
		959	static void atfork_parent (void)
		960	{
		961	#if !HAVE_READDIR_R
		962	pthread_mutex_unlock (&readdirlock);
		963	#endif
		964	#if !HAVE_PREADWRITE
		965	pthread_mutex_unlock (&preadwritelock);
		966	#endif
		967	pthread_mutex_unlock (&reslock);
		968	pthread_mutex_unlock (&reqlock);
		969	}
		970
		971	static void atfork_child (void)
		972	{
		973	aio_req prv;
		974
		975	started = 0;
		976
		977	while (prv = reqq_shift (&req_queue))
		978	req_free (prv);
		979
		980	while (prv = reqq_shift (&res_queue))
		981	req_free (prv);
		982
		983	close (respipe [0]);
		984	close (respipe [1]);
		985	create_pipe ();
		986
		987	atfork_parent ();
		988	}
		989
		990	#define dREQ \
		991	aio_req req; \
		992	int req_pri = next_pri; \
		993	next_pri = DEFAULT_PRI + PRI_BIAS; \
		994	\
		995	if (SvOK (callback) && !SvROK (callback)) \
		996	croak ("callback must be undef or of reference type"); \
		997	\
		998	Newz (0, req, 1, aio_cb); \
		999	if (!req) \
		1000	croak ("out of memory during aio_req allocation"); \
		1001	\
		1002	req->callback = newSVsv (callback); \
		1003	req->pri = req_pri
		1004
		1005	#define REQ_SEND \
		1006	req_send (req); \
		1007	\
		1008	if (GIMME_V != G_VOID) \
		1009	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		1010
331	MODULE = IO::AIO PACKAGE = IO::AIO	1011	MODULE = IO::AIO PACKAGE = IO::AIO
332		1012
333	PROTOTYPES: ENABLE	1013	PROTOTYPES: ENABLE
334		1014
335	BOOT:	1015	BOOT:
336	{	1016	{
337	if (pipe (respipe))	1017	HV *stash = gv_stashpv ("IO::AIO", 1);
338	croak ("unable to initialize result pipe");	1018	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1019	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1020	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
339		1021
340	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1022	create_pipe ();
341	croak ("cannot set result pipe to nonblocking mode");	1023	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
342
343	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
344	croak ("cannot set result pipe to nonblocking mode");
345	}	1024	}
346		1025
347	void	1026	void
348	min_parallel(nthreads)	1027	min_parallel (nthreads)
349	int nthreads	1028	int nthreads
350	PROTOTYPE: $	1029	PROTOTYPE: $
351	CODE:
352	while (nthreads > started)
353	start_thread ();
354		1030
355	void	1031	void
356	max_parallel(nthreads)	1032	max_parallel (nthreads)
357	int nthreads	1033	int nthreads
358	PROTOTYPE: $	1034	PROTOTYPE: $
359	CODE:
360	{
361	int cur = started;
362	while (cur > nthreads)
363	{
364	end_thread ();
365	cur--;
366	}
367
368	while (started > nthreads)
369	{
370	poll_wait ();
371	poll_cb ();
372	}
373	}
374		1035
375	int	1036	int
376	max_outstanding(nreqs)	1037	max_outstanding (nreqs)
377	int nreqs	1038	int nreqs
378	PROTOTYPE: $	1039	PROTOTYPE: $
379	CODE:	1040	CODE:
380	RETVAL = max_outstanding;	1041	RETVAL = max_outstanding;
381	max_outstanding = nreqs;	1042	max_outstanding = nreqs;
382		1043
383	void	1044	void
384	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1045	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
385	SV * pathname	1046	SV * pathname
386	int flags	1047	int flags
387	int mode	1048	int mode
388	SV * callback	1049	SV * callback
389	PROTOTYPE: $$$;$	1050	PROTOTYPE: $$$;$
390	CODE:	1051	PPCODE:
391	{	1052	{
392	aio_req req;	1053	dREQ;
393
394	Newz (0, req, 1, aio_cb);
395
396	if (!req)
397	croak ("out of memory during aio_req allocation");
398		1054
399	req->type = REQ_OPEN;	1055	req->type = REQ_OPEN;
400	req->data = newSVsv (pathname);	1056	req->data = newSVsv (pathname);
401	req->dataptr = SvPV_nolen (req->data);	1057	req->dataptr = SvPVbyte_nolen (req->data);
402	req->fd = flags;	1058	req->fd = flags;
403	req->mode = mode;	1059	req->mode = mode;
404	req->callback = SvREFCNT_inc (callback);
405		1060
406	send_req (req);	1061	REQ_SEND;
407	}	1062	}
408		1063
409	void	1064	void
410	aio_close(fh,callback=&PL_sv_undef)	1065	aio_close (fh,callback=&PL_sv_undef)
411	SV * fh	1066	SV * fh
412	SV * callback	1067	SV * callback
413	PROTOTYPE: $;$	1068	PROTOTYPE: $;$
414	ALIAS:	1069	ALIAS:
415	aio_close = REQ_CLOSE	1070	aio_close = REQ_CLOSE
416	aio_fsync = REQ_FSYNC	1071	aio_fsync = REQ_FSYNC
417	aio_fdatasync = REQ_FDATASYNC	1072	aio_fdatasync = REQ_FDATASYNC
418	CODE:	1073	PPCODE:
419	{	1074	{
420	aio_req req;	1075	dREQ;
421
422	Newz (0, req, 1, aio_cb);
423
424	if (!req)
425	croak ("out of memory during aio_req allocation");
426		1076
427	req->type = ix;	1077	req->type = ix;
428	req->fh = newSVsv (fh);	1078	req->fh = newSVsv (fh);
429	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1079	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
430	req->callback = SvREFCNT_inc (callback);
431		1080
432	send_req (req);	1081	REQ_SEND (req);
433	}	1082	}
434		1083
435	void	1084	void
436	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1085	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
437	SV * fh	1086	SV * fh
438	UV offset	1087	UV offset
439	IV length	1088	UV length
440	SV * data	1089	SV * data
441	IV dataoffset	1090	UV dataoffset
442	SV * callback	1091	SV * callback
443	ALIAS:	1092	ALIAS:
444	aio_read = REQ_READ	1093	aio_read = REQ_READ
445	aio_write = REQ_WRITE	1094	aio_write = REQ_WRITE
446	PROTOTYPE: $$$$$;$	1095	PROTOTYPE: $$$$$;$
447	CODE:	1096	PPCODE:
448	{	1097	{
449	aio_req req;	1098	aio_req req;
450	STRLEN svlen;	1099	STRLEN svlen;
451	char *svptr = SvPV (data, svlen);	1100	char *svptr = SvPVbyte (data, svlen);
452		1101
453	SvUPGRADE (data, SVt_PV);	1102	SvUPGRADE (data, SVt_PV);
454	SvPOK_on (data);	1103	SvPOK_on (data);
455		1104
456	if (dataoffset < 0)	1105	if (dataoffset < 0)
…		…
472	}	1121	}
473		1122
474	if (length < 0)	1123	if (length < 0)
475	croak ("length must not be negative");	1124	croak ("length must not be negative");
476		1125
477	Newz (0, req, 1, aio_cb);	1126	{
		1127	dREQ;
478		1128
479	if (!req)
480	croak ("out of memory during aio_req allocation");
481
482	req->type = ix;	1129	req->type = ix;
483	req->fh = newSVsv (fh);	1130	req->fh = newSVsv (fh);
484	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1131	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
485	: IoOFP (sv_2io (fh)));	1132	: IoOFP (sv_2io (fh)));
486	req->offset = offset;	1133	req->offset = offset;
		1134	req->length = length;
		1135	req->data = SvREFCNT_inc (data);
		1136	req->dataptr = (char *)svptr + dataoffset;
		1137
		1138	if (!SvREADONLY (data))
		1139	{
		1140	SvREADONLY_on (data);
		1141	req->data2ptr = (void *)data;
		1142	}
		1143
		1144	REQ_SEND;
		1145	}
		1146	}
		1147
		1148	void
		1149	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1150	SV * out_fh
		1151	SV * in_fh
		1152	UV in_offset
		1153	UV length
		1154	SV * callback
		1155	PROTOTYPE: $$$$;$
		1156	PPCODE:
		1157	{
		1158	dREQ;
		1159
		1160	req->type = REQ_SENDFILE;
		1161	req->fh = newSVsv (out_fh);
		1162	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1163	req->fh2 = newSVsv (in_fh);
		1164	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1165	req->offset = in_offset;
487	req->length = length;	1166	req->length = length;
488	req->data = SvREFCNT_inc (data);
489	req->dataptr = (char *)svptr + dataoffset;
490	req->callback = SvREFCNT_inc (callback);
491		1167
492	send_req (req);	1168	REQ_SEND;
493	}	1169	}
494		1170
495	void	1171	void
496	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1172	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
497	SV * fh	1173	SV * fh
498	UV offset	1174	UV offset
499	IV length	1175	IV length
500	SV * callback	1176	SV * callback
501	PROTOTYPE: $$$;$	1177	PROTOTYPE: $$$;$
502	CODE:	1178	PPCODE:
503	{	1179	{
504	aio_req req;	1180	dREQ;
505
506	if (length < 0)
507	croak ("length must not be negative");
508
509	Newz (0, req, 1, aio_cb);
510
511	if (!req)
512	croak ("out of memory during aio_req allocation");
513		1181
514	req->type = REQ_READAHEAD;	1182	req->type = REQ_READAHEAD;
515	req->fh = newSVsv (fh);	1183	req->fh = newSVsv (fh);
516	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
517	req->offset = offset;	1185	req->offset = offset;
518	req->length = length;	1186	req->length = length;
519	req->callback = SvREFCNT_inc (callback);
520		1187
521	send_req (req);	1188	REQ_SEND;
522	}	1189	}
523		1190
524	void	1191	void
525	aio_stat(fh_or_path,callback=&PL_sv_undef)	1192	aio_stat (fh_or_path,callback=&PL_sv_undef)
526	SV * fh_or_path	1193	SV * fh_or_path
527	SV * callback	1194	SV * callback
528	ALIAS:	1195	ALIAS:
529	aio_stat = REQ_STAT	1196	aio_stat = REQ_STAT
530	aio_lstat = REQ_LSTAT	1197	aio_lstat = REQ_LSTAT
531	CODE:	1198	PPCODE:
532	{	1199	{
533	aio_req req;	1200	dREQ;
534
535	Newz (0, req, 1, aio_cb);
536
537	if (!req)
538	croak ("out of memory during aio_req allocation");
539		1201
540	New (0, req->statdata, 1, Stat_t);	1202	New (0, req->statdata, 1, Stat_t);
541
542	if (!req->statdata)	1203	if (!req->statdata)
		1204	{
		1205	req_free (req);
543	croak ("out of memory during aio_req->statdata allocation");	1206	croak ("out of memory during aio_req->statdata allocation");
		1207	}
544		1208
545	if (SvPOK (fh_or_path))	1209	if (SvPOK (fh_or_path))
546	{	1210	{
547	req->type = ix;	1211	req->type = ix;
548	req->data = newSVsv (fh_or_path);	1212	req->data = newSVsv (fh_or_path);
549	req->dataptr = SvPV_nolen (req->data);	1213	req->dataptr = SvPVbyte_nolen (req->data);
550	}	1214	}
551	else	1215	else
552	{	1216	{
553	req->type = REQ_FSTAT;	1217	req->type = REQ_FSTAT;
554	req->fh = newSVsv (fh_or_path);	1218	req->fh = newSVsv (fh_or_path);
555	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1219	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
556	}	1220	}
557		1221
558	req->callback = SvREFCNT_inc (callback);	1222	REQ_SEND;
559
560	send_req (req);
561	}	1223	}
562		1224
563	void	1225	void
564	aio_unlink(pathname,callback=&PL_sv_undef)	1226	aio_unlink (pathname,callback=&PL_sv_undef)
565	SV * pathname	1227	SV * pathname
566	SV * callback	1228	SV * callback
		1229	ALIAS:
		1230	aio_unlink = REQ_UNLINK
		1231	aio_rmdir = REQ_RMDIR
		1232	aio_readdir = REQ_READDIR
567	CODE:	1233	PPCODE:
568	{	1234	{
569	aio_req req;	1235	dREQ;
570		1236
571	Newz (0, req, 1, aio_cb);	1237	req->type = ix;
		1238	req->data = newSVsv (pathname);
		1239	req->dataptr = SvPVbyte_nolen (req->data);
572		1240
573	if (!req)	1241	REQ_SEND;
574	croak ("out of memory during aio_req allocation");	1242	}
		1243
		1244	void
		1245	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1246	SV * oldpath
		1247	SV * newpath
		1248	SV * callback
		1249	ALIAS:
		1250	aio_link = REQ_LINK
		1251	aio_symlink = REQ_SYMLINK
		1252	aio_rename = REQ_RENAME
		1253	PPCODE:
		1254	{
		1255	dREQ;
575		1256
576	req->type = REQ_UNLINK;	1257	req->type = ix;
		1258	req->fh = newSVsv (oldpath);
		1259	req->data2ptr = SvPVbyte_nolen (req->fh);
577	req->data = newSVsv (pathname);	1260	req->data = newSVsv (newpath);
578	req->dataptr = SvPV_nolen (req->data);	1261	req->dataptr = SvPVbyte_nolen (req->data);
579	req->callback = SvREFCNT_inc (callback);
580		1262
581	send_req (req);	1263	REQ_SEND;
582	}	1264	}
583		1265
584	void	1266	void
		1267	aio_sleep (delay,callback=&PL_sv_undef)
		1268	double delay
		1269	SV * callback
		1270	PPCODE:
		1271	{
		1272	dREQ;
		1273
		1274	req->type = REQ_SLEEP;
		1275	req->fd = delay < 0. ? 0 : delay;
		1276	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1277
		1278	REQ_SEND;
		1279	}
		1280
		1281	void
		1282	aio_group (callback=&PL_sv_undef)
		1283	SV * callback
		1284	PROTOTYPE: ;$
		1285	PPCODE:
		1286	{
		1287	dREQ;
		1288
		1289	req->type = REQ_GROUP;
		1290	req_send (req);
		1291
		1292	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1293	}
		1294
		1295	void
		1296	aio_nop (callback=&PL_sv_undef)
		1297	SV * callback
		1298	PPCODE:
		1299	{
		1300	dREQ;
		1301
		1302	req->type = REQ_NOP;
		1303
		1304	REQ_SEND;
		1305	}
		1306
		1307	void
		1308	aioreq_pri (int pri = DEFAULT_PRI)
		1309	CODE:
		1310	if (pri < PRI_MIN) pri = PRI_MIN;
		1311	if (pri > PRI_MAX) pri = PRI_MAX;
		1312	next_pri = pri + PRI_BIAS;
		1313
		1314	void
		1315	aioreq_nice (int nice = 0)
		1316	CODE:
		1317	nice = next_pri - nice;
		1318	if (nice < PRI_MIN) nice = PRI_MIN;
		1319	if (nice > PRI_MAX) nice = PRI_MAX;
		1320	next_pri = nice + PRI_BIAS;
		1321
		1322	void
585	flush()	1323	flush ()
586	PROTOTYPE:	1324	PROTOTYPE:
587	CODE:	1325	CODE:
588	while (nreqs)	1326	while (nreqs)
589	{	1327	{
590	poll_wait ();	1328	poll_wait ();
…		…
630	CODE:	1368	CODE:
631	RETVAL = nreqs;	1369	RETVAL = nreqs;
632	OUTPUT:	1370	OUTPUT:
633	RETVAL	1371	RETVAL
634		1372
		1373	PROTOTYPES: DISABLE
		1374
		1375	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1376
		1377	void
		1378	cancel (aio_req_ornot req)
		1379	CODE:
		1380	req_cancel (req);
		1381
		1382	void
		1383	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1384	CODE:
		1385	SvREFCNT_dec (req->callback);
		1386	req->callback = newSVsv (callback);
		1387
		1388	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1389
		1390	void
		1391	add (aio_req grp, ...)
		1392	PPCODE:
		1393	{
		1394	int i;
		1395	aio_req req;
		1396
		1397	if (grp->fd == 2)
		1398	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1399
		1400	for (i = 1; i < items; ++i )
		1401	{
		1402	if (GIMME_V != G_VOID)
		1403	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1404
		1405	req = SvAIO_REQ (ST (i));
		1406
		1407	if (req)
		1408	{
		1409	++grp->length;
		1410	req->grp = grp;
		1411
		1412	req->grp_prev = 0;
		1413	req->grp_next = grp->grp_first;
		1414
		1415	if (grp->grp_first)
		1416	grp->grp_first->grp_prev = req;
		1417
		1418	grp->grp_first = req;
		1419	}
		1420	}
		1421	}
		1422
		1423	void
		1424	result (aio_req grp, ...)
		1425	CODE:
		1426	{
		1427	int i;
		1428	AV *av = newAV ();
		1429
		1430	for (i = 1; i < items; ++i )
		1431	av_push (av, newSVsv (ST (i)));
		1432
		1433	SvREFCNT_dec (grp->data);
		1434	grp->data = (SV *)av;
		1435	}
		1436
		1437	void
		1438	limit (aio_req grp, int limit)
		1439	CODE:
		1440	grp->fd2 = limit;
		1441	aio_grp_feed (grp);
		1442
		1443	void
		1444	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1445	CODE:
		1446	{
		1447	SvREFCNT_dec (grp->fh2);
		1448	grp->fh2 = newSVsv (callback);
		1449
		1450	if (grp->fd2 <= 0)
		1451	grp->fd2 = 2;
		1452
		1453	aio_grp_feed (grp);
		1454	}
		1455

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