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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.4 by root, Sun Jul 10 20:57:00 2005 UTC vs.
Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC

1	#define PERL_NO_GET_CONTEXT	1	/* solaris */
		2	#define _POSIX_PTHREAD_SEMANTICS 1
		3
		4	#if __linux
		5	# define _GNU_SOURCE
		6	#endif
		7
		8	#define _REENTRANT 1
		9
		10	#include <errno.h>
2		11
3	#include "EXTERN.h"	12	#include "EXTERN.h"
4	#include "perl.h"	13	#include "perl.h"
5	#include "XSUB.h"	14	#include "XSUB.h"
6		15
		16	#include "autoconf/config.h"
		17
		18	#include <pthread.h>
		19
		20	#include <stddef.h>
		21	#include <errno.h>
		22	#include <sys/time.h>
		23	#include <sys/select.h>
7	#include <sys/types.h>	24	#include <sys/types.h>
8	#include <sys/stat.h>	25	#include <sys/stat.h>
		26	#include <limits.h>
9	#include <unistd.h>	27	#include <unistd.h>
10	#include <fcntl.h>	28	#include <fcntl.h>
11	#include <signal.h>	29	#include <signal.h>
12	#include <sched.h>	30	#include <sched.h>
13	#include <endian.h>
14		31
15	#include <pthread.h>	32	#if HAVE_SENDFILE
		33	# if __linux
		34	# include <sys/sendfile.h>
		35	# elif __freebsd
16	#include <sys/syscall.h>	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
17		46
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	47	/* used for struct dirent, AIX doesn't provide it */
19	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	48	#ifndef NAME_MAX
20	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	49	# define NAME_MAX 4096
		50	#endif
21		51
22	#if __ia64	52	#if __ia64
23	# define STACKSIZE 65536	53	# define STACKSIZE 65536
		54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
		55	# define STACKSIZE PTHREAD_STACK_MIN
24	#else	56	#else
25	# define STACKSIZE 4096	57	# define STACKSIZE 16384
26	#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)
27		69
28	enum {	70	enum {
29	REQ_QUIT,	71	REQ_QUIT,
30	REQ_OPEN, REQ_CLOSE,	72	REQ_OPEN, REQ_CLOSE,
31	REQ_READ, REQ_WRITE, REQ_READAHEAD,	73	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		74	REQ_SENDFILE,
32	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	75	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
33	REQ_FSYNC, REQ_FDATASYNC,	76	REQ_FSYNC, REQ_FDATASYNC,
		77	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
		78	REQ_READDIR,
		79	REQ_LINK, REQ_SYMLINK,
		80	REQ_GROUP, REQ_NOP,
		81	REQ_BUSY,
34	};	82	};
35		83
		84	#define AIO_REQ_KLASS "IO::AIO::REQ"
		85	#define AIO_GRP_KLASS "IO::AIO::GRP"
		86
36	typedef struct aio_cb {	87	typedef struct aio_cb
		88	{
37	struct aio_cb *volatile next;	89	struct aio_cb *volatile next;
38		90
39	int type;	91	SV *data, *callback;
40		92	SV *fh, *fh2;
41	int fd;	93	void *dataptr, *data2ptr;
		94	Stat_t *statdata;
42	off_t offset;	95	off_t offset;
43	size_t length;	96	size_t length;
44	ssize_t result;	97	ssize_t result;
		98
		99	STRLEN dataoffset;
		100	int type;
		101	int fd, fd2;
		102	int errorno;
45	mode_t mode; /* open */	103	mode_t mode; /* open */
46	int errorno;
47	SV *data, *callback;
48	void *dataptr;
49	STRLEN dataoffset;
50		104
51	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;
52	} aio_cb;	110	} aio_cb;
53		111
		112	enum {
		113	FLAG_CANCELLED = 0x01,
		114	};
		115
54	typedef aio_cb *aio_req;	116	typedef aio_cb *aio_req;
		117	typedef aio_cb *aio_req_ornot;
55		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;
		129
56	static int started;	130	static int started, wanted;
57	static int nreqs;	131	static volatile int nreqs;
58	static int max_outstanding = 1<<30;	132	static int max_outstanding = 1<<30;
59	static int respipe [2];	133	static int respipe [2];
60		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
61	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	141	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
62	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;	142	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
63	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;	143	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
64		144
65	static volatile aio_req reqs, reqe; /* queue start, queue end */	145	/*
66	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;
67		154
68	static void	155	static reqq req_queue;
69	poll_wait ()	156	static reqq res_queue;
		157
		158	int reqq_push (reqq *q, aio_req req)
70	{	159	{
71	if (!nreqs)	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)
72	return;	179	return 0;
73		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);
		200	static void req_free (aio_req req);
		201
		202	/* must be called at most once */
		203	static SV *req_sv (aio_req req, const char *klass)
		204	{
		205	if (!req->self)
		206	{
		207	req->self = (SV *)newHV ();
		208	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		209	}
		210
		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	{
		250	SvREFCNT_dec (grp->fh2);
		251	grp->fh2 = 0;
		252	break;
		253	}
		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	{
74	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
75	FD_ZERO(&rfd);	290	FD_ZERO(&rfd);
76	FD_SET(respipe [0], &rfd);	291	FD_SET(respipe [0], &rfd);
77		292
78	select (respipe [0] + 1, &rfd, 0, 0, 0);	293	select (respipe [0] + 1, &rfd, 0, 0, 0);
		294	}
79	}	295	}
80		296
81	static int	297	static void req_invoke (aio_req req)
82	poll_cb (pTHX)	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 ()
83	{	441	{
84	dSP;	442	dSP;
85	int count = 0;	443	int count = 0;
		444	int do_croak = 0;
86	aio_req req;	445	aio_req req;
87
88	{
89	/* read and signals sent by the worker threads */
90	char buf [32];
91	while (read (respipe [0], buf, 32) > 0)
92	;
93	}
94		446
95	for (;;)	447	for (;;)
96	{	448	{
97	pthread_mutex_lock (&reslock);	449	pthread_mutex_lock (&reslock);
		450	req = reqq_shift (&res_queue);
98		451
99	req = ress;
100
101	if (ress)	452	if (req)
102	{	453	{
103	ress = ress->next;	454	if (!res_queue.size)
104	if (!ress) rese = 0;	455	{
		456	/* read any signals sent by the worker threads */
		457	char buf [32];
		458	while (read (respipe [0], buf, 32) == 32)
		459	;
		460	}
105	}	461	}
106		462
107	pthread_mutex_unlock (&reslock);	463	pthread_mutex_unlock (&reslock);
108		464
109	if (!req)	465	if (!req)
110	break;	466	break;
111		467
112	nreqs--;	468	--nreqs;
113		469
114	if (req->type == REQ_QUIT)	470	if (req->type == REQ_QUIT)
115	started--;	471	started--;
		472	else if (req->type == REQ_GROUP && req->length)
		473	{
		474	req->fd = 1; /* mark request as delayed */
		475	continue;
		476	}
116	else	477	else
117	{	478	{
118	int errorno = errno;
119	errno = req->errorno;
120
121	if (req->type == REQ_READ)	479	if (req->type == REQ_READ)
122	SvCUR_set (req->data, req->dataoffset	480	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
123	+ req->result > 0 ? req->result : 0);
124		481
		482	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		483	SvREADONLY_off (req->data);
		484
125	if (req->data)	485	if (req->statdata)
126	SvREFCNT_dec (req->data);
127
128	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
129	{	486	{
130	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131	PL_laststatval = req->result;	488	PL_laststatval = req->result;
132	PL_statcache = *(req->statdata);	489	PL_statcache = *(req->statdata);
133
134	Safefree (req->statdata);
135	}	490	}
136		491
137	PUSHMARK (SP);	492	req_invoke (req);
138	XPUSHs (sv_2mortal (newSViv (req->result)));
139		493
140	if (req->type == REQ_OPEN)
141	{
142	/* convert fd to fh */
143	SV *fh;
144
145	PUTBACK;
146	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
147	SPAGAIN;
148
149	fh = POPs;
150
151	PUSHMARK (SP);
152	XPUSHs (fh);
153	}
154
155	PUTBACK;
156	call_sv (req->callback, G_VOID | G_EVAL);
157	SPAGAIN;
158
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161
162	errno = errorno;
163	count++;	494	count++;
164	}	495	}
165		496
166	Safefree (req);	497	req_free (req);
167	}	498	}
168		499
169	return count;	500	return count;
170	}	501	}
171		502
172	static void *aio_proc(void *arg);	503	static void *aio_proc(void *arg);
173		504
174	static void
175	start_thread (void)	505	static void start_thread (void)
176	{	506	{
177	sigset_t fullsigset, oldsigset;	507	sigset_t fullsigset, oldsigset;
178	pthread_t tid;	508	pthread_t tid;
179	pthread_attr_t attr;	509	pthread_attr_t attr;
180		510
…		…
189	started++;	519	started++;
190		520
191	sigprocmask (SIG_SETMASK, &oldsigset, 0);	521	sigprocmask (SIG_SETMASK, &oldsigset, 0);
192	}	522	}
193		523
194	static void	524	static void req_send (aio_req req)
195	send_req (aio_req req)
196	{	525	{
		526	while (started < wanted && nreqs >= started)
		527	start_thread ();
		528
197	nreqs++;	529	++nreqs;
198		530
199	pthread_mutex_lock (&reqlock);	531	pthread_mutex_lock (&reqlock);
200		532	reqq_push (&req_queue, req);
201	req->next = 0;
202
203	if (reqe)
204	{
205	reqe->next = req;
206	reqe = req;
207	}
208	else
209	reqe = reqs = req;
210
211	pthread_cond_signal (&reqwait);	533	pthread_cond_signal (&reqwait);
212	pthread_mutex_unlock (&reqlock);	534	pthread_mutex_unlock (&reqlock);
213		535
214	while (nreqs > max_outstanding)	536	if (nreqs > max_outstanding)
		537	for (;;)
		538	{
		539	poll_cb ();
		540
		541	if (nreqs <= max_outstanding)
		542	break;
		543
		544	poll_wait ();
		545	}
		546	}
		547
		548	static void end_thread (void)
		549	{
		550	aio_req req;
		551
		552	Newz (0, req, 1, aio_cb);
		553
		554	req->type = REQ_QUIT;
		555	req->pri = PRI_MAX + PRI_BIAS;
		556
		557	req_send (req);
		558	}
		559
		560	static void min_parallel (int nthreads)
		561	{
		562	if (wanted < nthreads)
		563	wanted = nthreads;
		564	}
		565
		566	static void max_parallel (int nthreads)
		567	{
		568	int cur = started;
		569
		570	if (wanted > nthreads)
		571	wanted = nthreads;
		572
		573	while (cur > wanted)
		574	{
		575	end_thread ();
		576	cur--;
		577	}
		578
		579	while (started > wanted)
215	{	580	{
216	poll_wait ();	581	poll_wait ();
217	poll_cb ();	582	poll_cb ();
218	}	583	}
219	}	584	}
220		585
221	static void	586	static void create_pipe ()
222	end_thread (void)
223	{	587	{
224	aio_req req;	588	if (pipe (respipe))
225	New (0, req, 1, aio_cb);	589	croak ("unable to initialize result pipe");
226	req->type = REQ_QUIT;
227		590
228	send_req (req);	591	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
229	}	592	croak ("cannot set result pipe to nonblocking mode");
230		593
231	static void	594	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
232	read_write (pTHX_	595	croak ("cannot set result pipe to nonblocking mode");
233	int dowrite, int fd, off_t offset, size_t length,	596	}
234	SV *data, STRLEN dataoffset, SV *callback)
235	{
236	aio_req req;
237	STRLEN svlen;
238	char *svptr = SvPV (data, svlen);
239		597
240	SvUPGRADE (data, SVt_PV);	598	/*****************************************************************************/
241	SvPOK_on (data);	599	/* work around various missing functions */
242		600
243	if (dataoffset < 0)	601	#if !HAVE_PREADWRITE
		602	# define pread aio_pread
		603	# define pwrite aio_pwrite
		604
		605	/*
		606	* make our pread/pwrite safe against themselves, but not against
		607	* normal read/write by using a mutex. slows down execution a lot,
		608	* but that's your problem, not mine.
		609	*/
		610	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		611
		612	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
		613	{
		614	ssize_t res;
		615	off_t ooffset;
		616
		617	pthread_mutex_lock (&preadwritelock);
		618	ooffset = lseek (fd, 0, SEEK_CUR);
		619	lseek (fd, offset, SEEK_SET);
		620	res = read (fd, buf, count);
		621	lseek (fd, ooffset, SEEK_SET);
		622	pthread_mutex_unlock (&preadwritelock);
		623
		624	return res;
		625	}
		626
		627	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
		628	{
		629	ssize_t res;
		630	off_t ooffset;
		631
		632	pthread_mutex_lock (&preadwritelock);
		633	ooffset = lseek (fd, 0, SEEK_CUR);
		634	lseek (fd, offset, SEEK_SET);
		635	res = write (fd, buf, count);
		636	lseek (fd, offset, SEEK_SET);
		637	pthread_mutex_unlock (&preadwritelock);
		638
		639	return res;
		640	}
		641	#endif
		642
		643	#if !HAVE_FDATASYNC
		644	# define fdatasync fsync
		645	#endif
		646
		647	#if !HAVE_READAHEAD
		648	# define readahead aio_readahead
		649
		650	static ssize_t readahead (int fd, off_t offset, size_t count)
		651	{
		652	dBUF;
		653
		654	while (count > 0)
		655	{
		656	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
		657
		658	pread (fd, aio_buf, len, offset);
244	dataoffset += svlen;	659	offset += len;
245		660	count -= len;
246	if (dataoffset < 0 || dataoffset > svlen)
247	croak ("data offset outside of string");
248
249	if (dowrite)
250	{	661	}
251	/* write: check length and adjust. */	662
252	if (length < 0 || length + dataoffset > svlen)	663	fBUF;
253	length = svlen - dataoffset;	664
		665	errno = 0;
		666	}
		667	#endif
		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);
254	}	688	}
255	else	689	else
		690	*res = 0;
		691
		692	pthread_mutex_unlock (&readdirlock);
		693
		694	errno = errorno;
		695	return e ? 0 : -1;
		696	}
		697	#endif
		698
		699	/* sendfile always needs emulation */
		700	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		701	{
		702	ssize_t res;
		703
		704	if (!count)
		705	return 0;
		706
		707	#if HAVE_SENDFILE
		708	# if __linux
		709	res = sendfile (ofd, ifd, &offset, count);
		710
		711	# elif __freebsd
		712	/*
		713	* Of course, the freebsd sendfile is a dire hack with no thoughts
		714	* wasted on making it similar to other I/O functions.
		715	*/
		716	{
		717	off_t sbytes;
		718	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		719
		720	if (res < 0 && sbytes)
		721	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		722	res = sbytes;
		723	}
		724
		725	# elif __hpux
		726	res = sendfile (ofd, ifd, offset, count, 0, 0);
		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
		745	#else
		746	res = -1;
		747	errno = ENOSYS;
		748	#endif
		749
		750	if (res < 0
		751	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		752	#if __solaris
		753	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		754	#endif
		755	)
		756	)
		757	{
		758	/* emulate sendfile. this is a major pain in the ass */
		759	dBUF;
		760
		761	res = 0;
		762
		763	while (count)
		764	{
		765	ssize_t cnt;
		766
		767	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
		768
		769	if (cnt <= 0)
		770	{
		771	if (cnt && !res) res = -1;
		772	break;
		773	}
		774
		775	cnt = write (ofd, aio_buf, cnt);
		776
		777	if (cnt <= 0)
		778	{
		779	if (cnt && !res) res = -1;
		780	break;
		781	}
		782
		783	offset += cnt;
		784	res += cnt;
		785	count -= cnt;
		786	}
		787
		788	fBUF;
		789	}
		790
		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 (;;)
256	{	819	{
257	/* read: grow scalar as necessary */	820	errno = 0;
258	svptr = SvGROW (data, length + dataoffset);	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	}
259	}	845	}
260		846
261	if (length < 0)	847	errorno = errno;
262	croak ("length must not be negative");	848	free (u);
		849	closedir (dirp);
263		850
264	Newz (0, req, 1, aio_cb);	851	if (errorno)
		852	{
		853	free (names);
		854	errno = errorno;
		855	res = -1;
		856	}
265		857
266	if (!req)	858	*namesp = (void *)names;
267	croak ("out of memory during aio_req allocation");	859	return res;
268
269	req->type = dowrite ? REQ_WRITE : REQ_READ;
270	req->fd = fd;
271	req->offset = offset;
272	req->length = length;
273	req->data = SvREFCNT_inc (data);
274	req->dataptr = (char *)svptr + dataoffset;
275	req->callback = SvREFCNT_inc (callback);
276
277	send_req (req);
278	}	860	}
279		861
280	static void *	862	/*****************************************************************************/
		863
281	aio_proc (void *thr_arg)	864	static void *aio_proc (void *thr_arg)
282	{	865	{
283	aio_req req;	866	aio_req req;
284	int type;	867	int type;
285		868
286	do	869	do
287	{	870	{
288	pthread_mutex_lock (&reqlock);	871	pthread_mutex_lock (&reqlock);
289		872
290	for (;;)	873	for (;;)
291	{	874	{
292	req = reqs;	875	req = reqq_shift (&req_queue);
293
294	if (reqs)
295	{
296	reqs = reqs->next;
297	if (!reqs) reqe = 0;
298	}
299		876
300	if (req)	877	if (req)
301	break;	878	break;
302		879
303	pthread_cond_wait (&reqwait, &reqlock);	880	pthread_cond_wait (&reqwait, &reqlock);
304	}	881	}
305		882
306	pthread_mutex_unlock (&reqlock);	883	pthread_mutex_unlock (&reqlock);
307		884
308	errno = 0; /* strictly unnecessary */	885	errno = 0; /* strictly unnecessary */
		886	type = req->type; /* remember type for QUIT check */
309		887
310	type = req->type;	888	if (!(req->flags & FLAG_CANCELLED))
311
312	switch (type)	889	switch (type)
313	{	890	{
314	case REQ_READ: req->result = pread64 (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;
315	case REQ_WRITE: req->result = pwrite64 (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;
316	#if SYS_readahead	893
317	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;
318	#else	895	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
319	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
320	#endif
321		896
322	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	897	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
323	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	898	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
324	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	899	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
325		900
326	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;
327	case REQ_CLOSE: req->result = close (req->fd); break;	902	case REQ_CLOSE: req->result = close (req->fd); break;
328	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	903	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
329
330	case REQ_FSYNC: req->result = fsync (req->fd); 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;
		907	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		908
331	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	909	case REQ_FDATASYNC: req->result = fdatasync (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;
332		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:
333	case REQ_QUIT:	925	case REQ_QUIT:
334	break;	926	break;
335		927
336	default:	928	default:
337	req->result = ENOSYS;	929	req->result = ENOSYS;
338	break;	930	break;
339	}	931	}
340		932
341	req->errorno = errno;	933	req->errorno = errno;
342		934
343	pthread_mutex_lock (&reslock);	935	pthread_mutex_lock (&reslock);
344		936
345	req->next = 0;	937	if (!reqq_push (&res_queue, req))
346
347	if (rese)
348	{
349	rese->next = req;
350	rese = req;
351	}
352	else
353	{
354	rese = ress = req;
355
356	/* write a dummy byte to the pipe so fh becomes ready */	938	/* write a dummy byte to the pipe so fh becomes ready */
357	write (respipe [1], &respipe, 1);	939	write (respipe [1], &respipe, 1);
358	}
359		940
360	pthread_mutex_unlock (&reslock);	941	pthread_mutex_unlock (&reslock);
361	}	942	}
362	while (type != REQ_QUIT);	943	while (type != REQ_QUIT);
363		944
364	return 0;	945	return 0;
365	}	946	}
366		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 ();
		991	}
		992
		993	#define dREQ \
		994	aio_req req; \
		995	int req_pri = next_pri; \
		996	next_pri = DEFAULT_PRI + PRI_BIAS; \
		997	\
		998	if (SvOK (callback) && !SvROK (callback)) \
		999	croak ("callback must be undef or of reference type"); \
		1000	\
		1001	Newz (0, req, 1, aio_cb); \
		1002	if (!req) \
		1003	croak ("out of memory during aio_req allocation"); \
		1004	\
		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));
		1013
367	MODULE = IO::AIO PACKAGE = IO::AIO	1014	MODULE = IO::AIO PACKAGE = IO::AIO
368		1015
		1016	PROTOTYPES: ENABLE
		1017
369	BOOT:	1018	BOOT:
370	{	1019	{
371	if (pipe (respipe))	1020	HV *stash = gv_stashpv ("IO::AIO", 1);
372	croak ("unable to initialize result pipe");	1021	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		1022	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		1023	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
373		1024
374	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	1025	create_pipe ();
375	croak ("cannot set result pipe to nonblocking mode");	1026	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
376
377	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
378	croak ("cannot set result pipe to nonblocking mode");
379	}	1027	}
380		1028
381	void	1029	void
382	min_parallel(nthreads)	1030	min_parallel (nthreads)
383	int nthreads	1031	int nthreads
384	PROTOTYPE: $	1032	PROTOTYPE: $
385	CODE:
386	while (nthreads > started)
387	start_thread ();
388		1033
389	void	1034	void
390	max_parallel(nthreads)	1035	max_parallel (nthreads)
391	int nthreads	1036	int nthreads
392	PROTOTYPE: $	1037	PROTOTYPE: $
393	CODE:
394	{
395	int cur = started;
396	while (cur > nthreads)
397	{
398	end_thread ();
399	cur--;
400	}
401
402	while (started > nthreads)
403	{
404	poll_wait ();
405	poll_cb (aTHX);
406	}
407	}
408		1038
409	int	1039	int
410	max_outstanding(nreqs)	1040	max_outstanding (nreqs)
411	int nreqs	1041	int nreqs
412	PROTOTYPE: $	1042	PROTOTYPE: $
413	CODE:	1043	CODE:
414	RETVAL = max_outstanding;	1044	RETVAL = max_outstanding;
415	max_outstanding = nreqs;	1045	max_outstanding = nreqs;
416		1046
417	void	1047	void
418	aio_open(pathname,flags,mode,callback)	1048	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
419	SV * pathname	1049	SV * pathname
420	int flags	1050	int flags
421	int mode	1051	int mode
422	SV * callback	1052	SV * callback
423	PROTOTYPE: $$$$	1053	PROTOTYPE: $$$;$
424	CODE:	1054	PPCODE:
425	{	1055	{
426	aio_req req;	1056	dREQ;
427
428	Newz (0, req, 1, aio_cb);
429
430	if (!req)
431	croak ("out of memory during aio_req allocation");
432		1057
433	req->type = REQ_OPEN;	1058	req->type = REQ_OPEN;
434	req->data = newSVsv (pathname);	1059	req->data = newSVsv (pathname);
435	req->dataptr = SvPV_nolen (req->data);	1060	req->dataptr = SvPVbyte_nolen (req->data);
436	req->fd = flags;	1061	req->fd = flags;
437	req->mode = mode;	1062	req->mode = mode;
438	req->callback = SvREFCNT_inc (callback);
439		1063
440	send_req (req);	1064	REQ_SEND;
441	}	1065	}
442		1066
443	void	1067	void
444	aio_close(fh,callback)	1068	aio_close (fh,callback=&PL_sv_undef)
445	InputStream fh	1069	SV * fh
446	SV * callback	1070	SV * callback
447	PROTOTYPE: $$	1071	PROTOTYPE: $;$
448	ALIAS:	1072	ALIAS:
449	aio_close = REQ_CLOSE	1073	aio_close = REQ_CLOSE
450	aio_fsync = REQ_FSYNC	1074	aio_fsync = REQ_FSYNC
451	aio_fdatasync = REQ_FDATASYNC	1075	aio_fdatasync = REQ_FDATASYNC
452	CODE:	1076	PPCODE:
		1077	{
		1078	dREQ;
		1079
		1080	req->type = ix;
		1081	req->fh = newSVsv (fh);
		1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		1083
		1084	REQ_SEND (req);
		1085	}
		1086
		1087	void
		1088	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		1089	SV * fh
		1090	UV offset
		1091	UV length
		1092	SV * data
		1093	UV dataoffset
		1094	SV * callback
		1095	ALIAS:
		1096	aio_read = REQ_READ
		1097	aio_write = REQ_WRITE
		1098	PROTOTYPE: $$$$$;$
		1099	PPCODE:
453	{	1100	{
454	aio_req req;	1101	aio_req req;
		1102	STRLEN svlen;
		1103	char *svptr = SvPVbyte (data, svlen);
455		1104
456	Newz (0, req, 1, aio_cb);	1105	SvUPGRADE (data, SVt_PV);
		1106	SvPOK_on (data);
457		1107
458	if (!req)	1108	if (dataoffset < 0)
459	croak ("out of memory during aio_req allocation");	1109	dataoffset += svlen;
460		1110
461	req->type = ix;	1111	if (dataoffset < 0 || dataoffset > svlen)
462	req->fd = PerlIO_fileno (fh);	1112	croak ("data offset outside of string");
463	req->callback = SvREFCNT_inc (callback);
464		1113
465	send_req (req);	1114	if (ix == REQ_WRITE)
466	}	1115	{
467		1116	/* write: check length and adjust. */
468	void	1117	if (length < 0 || length + dataoffset > svlen)
469	aio_read(fh,offset,length,data,dataoffset,callback)	1118	length = svlen - dataoffset;
470	InputStream fh	1119	}
471	UV offset	1120	else
472	IV length	1121	{
473	SV * data	1122	/* read: grow scalar as necessary */
474	IV dataoffset	1123	svptr = SvGROW (data, length + dataoffset);
475	SV * callback	1124	}
476	PROTOTYPE: $$$$$$
477	CODE:
478	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
479
480	void
481	aio_write(fh,offset,length,data,dataoffset,callback)
482	OutputStream fh
483	UV offset
484	IV length
485	SV * data
486	IV dataoffset
487	SV * callback
488	PROTOTYPE: $$$$$$
489	CODE:
490	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
491
492	void
493	aio_readahead(fh,offset,length,callback)
494	InputStream fh
495	UV offset
496	IV length
497	SV * callback
498	PROTOTYPE: $$$$
499	CODE:
500	{
501	aio_req req;
502		1125
503	if (length < 0)	1126	if (length < 0)
504	croak ("length must not be negative");	1127	croak ("length must not be negative");
505		1128
506	Newz (0, req, 1, aio_cb);	1129	{
		1130	dREQ;
507		1131
508	if (!req)	1132	req->type = ix;
509	croak ("out of memory during aio_req allocation");	1133	req->fh = newSVsv (fh);
		1134	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		1135	: IoOFP (sv_2io (fh)));
		1136	req->offset = offset;
		1137	req->length = length;
		1138	req->data = SvREFCNT_inc (data);
		1139	req->dataptr = (char *)svptr + dataoffset;
		1140
		1141	if (!SvREADONLY (data))
		1142	{
		1143	SvREADONLY_on (data);
		1144	req->data2ptr = (void *)data;
		1145	}
		1146
		1147	REQ_SEND;
		1148	}
		1149	}
		1150
		1151	void
		1152	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1153	SV * out_fh
		1154	SV * in_fh
		1155	UV in_offset
		1156	UV length
		1157	SV * callback
		1158	PROTOTYPE: $$$$;$
		1159	PPCODE:
		1160	{
		1161	dREQ;
		1162
		1163	req->type = REQ_SENDFILE;
		1164	req->fh = newSVsv (out_fh);
		1165	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1166	req->fh2 = newSVsv (in_fh);
		1167	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1168	req->offset = in_offset;
		1169	req->length = length;
		1170
		1171	REQ_SEND;
		1172	}
		1173
		1174	void
		1175	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
		1176	SV * fh
		1177	UV offset
		1178	IV length
		1179	SV * callback
		1180	PROTOTYPE: $$$;$
		1181	PPCODE:
		1182	{
		1183	dREQ;
510		1184
511	req->type = REQ_READAHEAD;	1185	req->type = REQ_READAHEAD;
		1186	req->fh = newSVsv (fh);
512	req->fd = PerlIO_fileno (fh);	1187	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
513	req->offset = offset;	1188	req->offset = offset;
514	req->length = length;	1189	req->length = length;
515	req->callback = SvREFCNT_inc (callback);
516		1190
517	send_req (req);	1191	REQ_SEND;
518	}	1192	}
519		1193
520	void	1194	void
521	aio_stat(fh_or_path,callback)	1195	aio_stat (fh_or_path,callback=&PL_sv_undef)
522	SV * fh_or_path	1196	SV * fh_or_path
523	SV * callback	1197	SV * callback
524	PROTOTYPE: $$
525	ALIAS:	1198	ALIAS:
		1199	aio_stat = REQ_STAT
526	aio_lstat = 1	1200	aio_lstat = REQ_LSTAT
527	CODE:	1201	PPCODE:
528	{	1202	{
529	aio_req req;	1203	dREQ;
530
531	Newz (0, req, 1, aio_cb);
532
533	if (!req)
534	croak ("out of memory during aio_req allocation");
535		1204
536	New (0, req->statdata, 1, Stat_t);	1205	New (0, req->statdata, 1, Stat_t);
537
538	if (!req->statdata)	1206	if (!req->statdata)
		1207	{
		1208	req_free (req);
539	croak ("out of memory during aio_req->statdata allocation");	1209	croak ("out of memory during aio_req->statdata allocation");
		1210	}
540		1211
541	if (SvPOK (fh_or_path))	1212	if (SvPOK (fh_or_path))
542	{	1213	{
543	req->type = ix ? REQ_LSTAT : REQ_STAT;	1214	req->type = ix;
544	req->data = newSVsv (fh_or_path);	1215	req->data = newSVsv (fh_or_path);
545	req->dataptr = SvPV_nolen (req->data);	1216	req->dataptr = SvPVbyte_nolen (req->data);
546	}	1217	}
547	else	1218	else
548	{	1219	{
549	req->type = REQ_FSTAT;	1220	req->type = REQ_FSTAT;
		1221	req->fh = newSVsv (fh_or_path);
550	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1222	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
551	}	1223	}
552		1224
553	req->callback = SvREFCNT_inc (callback);	1225	REQ_SEND;
554
555	send_req (req);
556	}	1226	}
557		1227
558	void	1228	void
559	aio_unlink(pathname,callback)	1229	aio_unlink (pathname,callback=&PL_sv_undef)
560	SV * pathname	1230	SV * pathname
561	SV * callback	1231	SV * callback
		1232	ALIAS:
		1233	aio_unlink = REQ_UNLINK
		1234	aio_rmdir = REQ_RMDIR
		1235	aio_readdir = REQ_READDIR
		1236	PPCODE:
		1237	{
		1238	dREQ;
		1239
		1240	req->type = ix;
		1241	req->data = newSVsv (pathname);
		1242	req->dataptr = SvPVbyte_nolen (req->data);
		1243
		1244	REQ_SEND;
		1245	}
		1246
		1247	void
		1248	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1249	SV * oldpath
		1250	SV * newpath
		1251	SV * callback
		1252	ALIAS:
		1253	aio_link = REQ_LINK
		1254	aio_symlink = REQ_SYMLINK
		1255	aio_rename = REQ_RENAME
		1256	PPCODE:
		1257	{
		1258	dREQ;
		1259
		1260	req->type = ix;
		1261	req->fh = newSVsv (oldpath);
		1262	req->data2ptr = SvPVbyte_nolen (req->fh);
		1263	req->data = newSVsv (newpath);
		1264	req->dataptr = SvPVbyte_nolen (req->data);
		1265
		1266	REQ_SEND;
		1267	}
		1268
		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
562	PROTOTYPE: $$	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
		1326	flush ()
		1327	PROTOTYPE:
563	CODE:	1328	CODE:
564	{	1329	while (nreqs)
565	aio_req req;	1330	{
566		1331	poll_wait ();
567	Newz (0, req, 1, aio_cb);	1332	poll_cb ();
568		1333	}
569	if (!req)	1334
570	croak ("out of memory during aio_req allocation");	1335	void
571		1336	poll()
572	req->type = REQ_UNLINK;	1337	PROTOTYPE:
573	req->data = newSVsv (pathname);	1338	CODE:
574	req->dataptr = SvPV_nolen (req->data);	1339	if (nreqs)
575	req->callback = SvREFCNT_inc (callback);	1340	{
576		1341	poll_wait ();
577	send_req (req);	1342	poll_cb ();
578	}	1343	}
579		1344
580	int	1345	int
581	poll_fileno()	1346	poll_fileno()
582	PROTOTYPE:	1347	PROTOTYPE:
583	CODE:	1348	CODE:
…		…
587		1352
588	int	1353	int
589	poll_cb(...)	1354	poll_cb(...)
590	PROTOTYPE:	1355	PROTOTYPE:
591	CODE:	1356	CODE:
592	RETVAL = poll_cb (aTHX);	1357	RETVAL = poll_cb ();
593	OUTPUT:	1358	OUTPUT:
594	RETVAL	1359	RETVAL
595		1360
596	void	1361	void
597	poll_wait()	1362	poll_wait()
…		…
606	CODE:	1371	CODE:
607	RETVAL = nreqs;	1372	RETVAL = nreqs;
608	OUTPUT:	1373	OUTPUT:
609	RETVAL	1374	RETVAL
610		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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