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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.2 by root, Sun Jul 10 18:16:49 2005 UTC vs.
Revision 1.63 by root, Mon Oct 23 23:48:31 2006 UTC

1	#define PERL_NO_GET_CONTEXT	1	#if __linux
		2	# define _GNU_SOURCE
		3	#endif
		4
		5	#define _REENTRANT 1
		6
		7	#include <errno.h>
2		8
3	#include "EXTERN.h"	9	#include "EXTERN.h"
4	#include "perl.h"	10	#include "perl.h"
5	#include "XSUB.h"	11	#include "XSUB.h"
6		12
		13	#include "autoconf/config.h"
		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>
		23	#include <limits.h>
9	#include <unistd.h>	24	#include <unistd.h>
10	#include <fcntl.h>	25	#include <fcntl.h>
11	#include <signal.h>	26	#include <signal.h>
12	#include <sched.h>	27	#include <sched.h>
13	#include <endian.h>
14		28
15	#include <pthread.h>	29	#if HAVE_SENDFILE
		30	# if __linux
		31	# include <sys/sendfile.h>
		32	# elif __freebsd
16	#include <sys/syscall.h>	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
17		43
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	44	/* used for struct dirent, AIX doesn't provide it */
19	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	45	#ifndef NAME_MAX
20	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	46	# define NAME_MAX 4096
		47	#endif
21		48
22	#if __i386 || __amd64
23	# define STACKSIZE ( 256 * sizeof (long))
24	#elif __ia64	49	#if __ia64
25	# define STACKSIZE (8192 * sizeof (long))	50	# define STACKSIZE 65536
26	#else	51	#else
27	# define STACKSIZE ( 512 * sizeof (long))	52	# define STACKSIZE 8192
28	#endif	53	#endif
29		54
30	enum {	55	enum {
31	REQ_QUIT,	56	REQ_QUIT,
32	REQ_OPEN, REQ_CLOSE,	57	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,	58	REQ_READ, REQ_WRITE, REQ_READAHEAD,
		59	REQ_SENDFILE,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,	60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,	61	REQ_FSYNC, REQ_FDATASYNC,
		62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
		63	REQ_READDIR,
		64	REQ_LINK, REQ_SYMLINK,
		65	REQ_GROUP, REQ_NOP,
		66	REQ_SLEEP,
36	};	67	};
37		68
		69	#define AIO_REQ_KLASS "IO::AIO::REQ"
		70	#define AIO_GRP_KLASS "IO::AIO::GRP"
		71
38	typedef struct aio_cb {	72	typedef struct aio_cb
		73	{
39	struct aio_cb *next;	74	struct aio_cb *volatile next;
40		75
41	int type;	76	SV *data, *callback;
42		77	SV *fh, *fh2;
43	int fd;	78	void *dataptr, *data2ptr;
		79	Stat_t *statdata;
44	off_t offset;	80	off_t offset;
45	size_t length;	81	size_t length;
46	ssize_t result;	82	ssize_t result;
		83
		84	STRLEN dataoffset;
		85	int type;
		86	int fd, fd2;
		87	int errorno;
47	mode_t mode; /* open */	88	mode_t mode; /* open */
48	int errorno;
49	SV *data, *callback;
50	void *dataptr;
51	STRLEN dataoffset;
52		89
53	Stat_t *statdata;	90	unsigned char flags;
		91	unsigned char pri;
		92
		93	SV *self; /* the perl counterpart of this request, if any */
		94	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
54	} aio_cb;	95	} aio_cb;
55		96
		97	enum {
		98	FLAG_CANCELLED = 0x01,
		99	};
		100
56	typedef aio_cb *aio_req;	101	typedef aio_cb *aio_req;
		102	typedef aio_cb *aio_req_ornot;
57		103
		104	enum {
		105	PRI_MIN = -4,
		106	PRI_MAX = 4,
		107
		108	DEFAULT_PRI = 0,
		109	PRI_BIAS = -PRI_MIN,
		110	};
		111
		112	static int next_pri = DEFAULT_PRI + PRI_BIAS;
		113
58	static int started;	114	static int started, wanted;
59	static int nreqs;	115	static volatile int nreqs;
		116	static int max_outstanding = 1<<30;
60	static int reqpipe[2], respipe[2];	117	static int respipe [2];
61		118
		119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
		120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
		121	#else
		122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
		123	#endif
		124
		125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
		126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
		127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
		128
62	static aio_req qs, qe; /* queue start, queue end */	129	static volatile aio_req reqs, reqe; /* queue start, queue end */
		130	static volatile aio_req ress, rese; /* queue start, queue end */
63		131
64	static void *aio_proc(void *arg);	132	static void req_invoke (aio_req req);
		133	static void req_free (aio_req req);
65		134
66	static void	135	/* must be called at most once */
67	start_thread (void)	136	static SV *req_sv (aio_req req, const char *klass)
68	{	137	{
69	sigset_t fullsigset, oldsigset;	138	if (!req->self)
70	pthread_t tid;
71	pthread_attr_t attr;
72
73	pthread_attr_init (&attr);
74	pthread_attr_setstacksize (&attr, STACKSIZE);
75	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
76
77	sigfillset (&fullsigset);
78	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
79
80	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
81	started++;
82
83	sigprocmask (SIG_SETMASK, &oldsigset, 0);
84	}
85
86	static void
87	send_reqs (void)
88	{
89	/* this write is atomic */
90	while (qs && write (reqpipe[1], &qs, sizeof qs) == sizeof qs)
91	{	139	{
92	qs = qs->next;	140	req->self = (SV *)newHV ();
93	if (!qs) qe = 0;	141	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
94	}	142	}
95	}
96		143
97	static void	144	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
98	send_req (aio_req req)	145	}
99	{
100	nreqs++;
101	req->next = 0;
102		146
103	if (qe)	147	static aio_req SvAIO_REQ (SV *sv)
104	{	148	{
105	qe->next = req;	149	MAGIC *mg;
106	qe = req;	150
		151	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		152	croak ("object of class " AIO_REQ_KLASS " expected");
		153
		154	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		155
		156	return mg ? (aio_req)mg->mg_ptr : 0;
		157	}
		158
		159	static void aio_grp_feed (aio_req grp)
		160	{
		161	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))
107	}	162	{
108	else	163	int old_len = grp->length;
109	qe = qs = req;
110		164
111	send_reqs ();	165	if (grp->fh2 && SvOK (grp->fh2))
112	}	166	{
		167	dSP;
113		168
114	static void	169	ENTER;
115	end_thread (void)	170	SAVETMPS;
116	{	171	PUSHMARK (SP);
117	aio_req req;	172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
118	New (0, req, 1, aio_cb);	173	PUTBACK;
119	req->type = REQ_QUIT;	174	call_sv (grp->fh2, G_VOID | G_EVAL);
		175	SPAGAIN;
		176	FREETMPS;
		177	LEAVE;
		178	}
120		179
121	send_req (req);	180	/* stop if no progress has been made */
122	}	181	if (old_len == grp->length)
123		182	{
124	static void	183	SvREFCNT_dec (grp->fh2);
125	read_write (pTHX_	184	grp->fh2 = 0;
126	int dowrite, int fd, off_t offset, size_t length,	185	break;
127	SV *data, STRLEN dataoffset, SV *callback)	186	}
128	{
129	aio_req req;
130	STRLEN svlen;
131	char *svptr = SvPV (data, svlen);
132
133	SvUPGRADE (data, SVt_PV);
134	SvPOK_on (data);
135
136	if (dataoffset < 0)
137	dataoffset += svlen;
138
139	if (dataoffset < 0 || dataoffset > svlen)
140	croak ("data offset outside of string");
141
142	if (dowrite)
143	{	187	}
144	/* write: check length and adjust. */	188	}
145	if (length < 0 || length + dataoffset > svlen)	189
146	length = svlen - dataoffset;	190	static void aio_grp_dec (aio_req grp)
		191	{
		192	--grp->length;
		193
		194	/* call feeder, if applicable */
		195	aio_grp_feed (grp);
		196
		197	/* finish, if done */
		198	if (!grp->length && grp->fd)
147	}	199	{
148	else	200	req_invoke (grp);
		201	req_free (grp);
149	{	202	}
150	/* read: grow scalar as necessary */
151	svptr = SvGROW (data, length + dataoffset);
152	}
153
154	if (length < 0)
155	croak ("length must not be negative");
156
157	Newz (0, req, 1, aio_cb);
158
159	if (!req)
160	croak ("out of memory during aio_req allocation");
161
162	req->type = dowrite ? REQ_WRITE : REQ_READ;
163	req->fd = fd;
164	req->offset = offset;
165	req->length = length;
166	req->data = SvREFCNT_inc (data);
167	req->dataptr = (char *)svptr + dataoffset;
168	req->callback = SvREFCNT_inc (callback);
169
170	send_req (req);
171	}	203	}
172		204
173	static void	205	static void poll_wait ()
174	poll_wait ()
175	{	206	{
176	fd_set rfd;	207	fd_set rfd;
		208
		209	while (nreqs)
		210	{
		211	aio_req req;
		212	pthread_mutex_lock (&reslock);
		213	req = ress;
		214	pthread_mutex_unlock (&reslock);
		215
		216	if (req)
		217	return;
		218
177	FD_ZERO(&rfd);	219	FD_ZERO(&rfd);
178	FD_SET(respipe[0], &rfd);	220	FD_SET(respipe [0], &rfd);
179		221
180	select (respipe[0] + 1, &rfd, 0, 0, 0);	222	select (respipe [0] + 1, &rfd, 0, 0, 0);
		223	}
181	}	224	}
182		225
183	static int	226	static void req_invoke (aio_req req)
184	poll_cb (pTHX)	227	{
		228	dSP;
		229	int errorno = errno;
		230
		231	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
		232	return;
		233
		234	errno = req->errorno;
		235
		236	ENTER;
		237	SAVETMPS;
		238	PUSHMARK (SP);
		239	EXTEND (SP, 1);
		240
		241	switch (req->type)
		242	{
		243	case REQ_READDIR:
		244	{
		245	SV *rv = &PL_sv_undef;
		246
		247	if (req->result >= 0)
		248	{
		249	char *buf = req->data2ptr;
		250	AV *av = newAV ();
		251
		252	while (req->result)
		253	{
		254	SV *sv = newSVpv (buf, 0);
		255
		256	av_push (av, sv);
		257	buf += SvCUR (sv) + 1;
		258	req->result--;
		259	}
		260
		261	rv = sv_2mortal (newRV_noinc ((SV *)av));
		262	}
		263
		264	PUSHs (rv);
		265	}
		266	break;
		267
		268	case REQ_OPEN:
		269	{
		270	/* convert fd to fh */
		271	SV *fh;
		272
		273	PUSHs (sv_2mortal (newSViv (req->result)));
		274	PUTBACK;
		275	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
		276	SPAGAIN;
		277
		278	fh = SvREFCNT_inc (POPs);
		279
		280	PUSHMARK (SP);
		281	XPUSHs (sv_2mortal (fh));
		282	}
		283	break;
		284
		285	case REQ_GROUP:
		286	req->fd = 2; /* mark group as finished */
		287
		288	if (req->data)
		289	{
		290	int i;
		291	AV *av = (AV *)req->data;
		292
		293	EXTEND (SP, AvFILL (av) + 1);
		294	for (i = 0; i <= AvFILL (av); ++i)
		295	PUSHs (*av_fetch (av, i, 0));
		296	}
		297	break;
		298
		299	case REQ_NOP:
		300	case REQ_SLEEP:
		301	break;
		302
		303	default:
		304	PUSHs (sv_2mortal (newSViv (req->result)));
		305	break;
		306	}
		307
		308
		309	PUTBACK;
		310	call_sv (req->callback, G_VOID | G_EVAL);
		311	SPAGAIN;
		312
		313	FREETMPS;
		314	LEAVE;
		315
		316	errno = errorno;
		317
		318	if (SvTRUE (ERRSV))
		319	{
		320	req_free (req);
		321	croak (0);
		322	}
		323	}
		324
		325	static void req_free (aio_req req)
		326	{
		327	if (req->grp)
		328	{
		329	aio_req grp = req->grp;
		330
		331	/* unlink request */
		332	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
		333	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
		334
		335	if (grp->grp_first == req)
		336	grp->grp_first = req->grp_next;
		337
		338	aio_grp_dec (grp);
		339	}
		340
		341	if (req->self)
		342	{
		343	sv_unmagic (req->self, PERL_MAGIC_ext);
		344	SvREFCNT_dec (req->self);
		345	}
		346
		347	SvREFCNT_dec (req->data);
		348	SvREFCNT_dec (req->fh);
		349	SvREFCNT_dec (req->fh2);
		350	SvREFCNT_dec (req->callback);
		351	Safefree (req->statdata);
		352
		353	if (req->type == REQ_READDIR && req->result >= 0)
		354	free (req->data2ptr);
		355
		356	Safefree (req);
		357	}
		358
		359	static void req_cancel (aio_req req)
		360	{
		361	req->flags |= FLAG_CANCELLED;
		362
		363	if (req->type == REQ_GROUP)
		364	{
		365	aio_req sub;
		366
		367	for (sub = req->grp_first; sub; sub = sub->grp_next)
		368	req_cancel (sub);
		369	}
		370	}
		371
		372	static int poll_cb ()
185	{	373	{
186	dSP;	374	dSP;
187	int count = 0;	375	int count = 0;
		376	int do_croak = 0;
188	aio_req req;	377	aio_req req;
189		378
190	while (read (respipe[0], (void *)&req, sizeof (req)) == sizeof (req))	379	for (;;)
191	{	380	{
		381	pthread_mutex_lock (&reslock);
		382	req = ress;
		383
		384	if (req)
		385	{
		386	ress = req->next;
		387
		388	if (!ress)
		389	{
		390	/* read any signals sent by the worker threads */
		391	char buf [32];
		392	while (read (respipe [0], buf, 32) == 32)
		393	;
		394
		395	rese = 0;
		396	}
		397	}
		398
		399	pthread_mutex_unlock (&reslock);
		400
		401	if (!req)
		402	break;
		403
192	nreqs--;	404	--nreqs;
193		405
194	if (req->type == REQ_QUIT)	406	if (req->type == REQ_QUIT)
195	started--;	407	started--;
		408	else if (req->type == REQ_GROUP && req->length)
		409	{
		410	req->fd = 1; /* mark request as delayed */
		411	continue;
		412	}
196	else	413	else
197	{	414	{
198	int errorno = errno;
199	errno = req->errorno;
200
201	if (req->type == REQ_READ)	415	if (req->type == REQ_READ)
202	SvCUR_set (req->data, req->dataoffset	416	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
203	+ req->result > 0 ? req->result : 0);
204		417
		418	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
		419	SvREADONLY_off (req->data);
		420
205	if (req->data)	421	if (req->statdata)
206	SvREFCNT_dec (req->data);
207
208	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
209	{	422	{
210	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	423	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
211	PL_laststatval = req->result;	424	PL_laststatval = req->result;
212	PL_statcache = *(req->statdata);	425	PL_statcache = *(req->statdata);
213
214	Safefree (req->statdata);
215	}	426	}
216		427
217	PUSHMARK (SP);	428	req_invoke (req);
218	XPUSHs (sv_2mortal (newSViv (req->result)));
219		429
220	if (req->type == REQ_OPEN)
221	{
222	/* convert fd to fh */
223	SV *fh;
224
225	PUTBACK;
226	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
227	SPAGAIN;
228
229	fh = POPs;
230
231	PUSHMARK (SP);
232	XPUSHs (fh);
233	}
234
235	PUTBACK;
236	call_sv (req->callback, G_VOID | G_EVAL);
237	SPAGAIN;
238
239	if (req->callback)
240	SvREFCNT_dec (req->callback);
241
242	errno = errorno;
243	count++;	430	count++;
244	}	431	}
245		432
246	Safefree (req);	433	req_free (req);
247	}	434	}
248
249	if (qs)
250	send_reqs ();
251		435
252	return count;	436	return count;
253	}	437	}
254		438
255	static void *	439	static void *aio_proc(void *arg);
256	aio_proc (void *thr_arg)	440
		441	static void start_thread (void)
		442	{
		443	sigset_t fullsigset, oldsigset;
		444	pthread_t tid;
		445	pthread_attr_t attr;
		446
		447	pthread_attr_init (&attr);
		448	pthread_attr_setstacksize (&attr, STACKSIZE);
		449	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
		450
		451	sigfillset (&fullsigset);
		452	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
		453
		454	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
		455	started++;
		456
		457	sigprocmask (SIG_SETMASK, &oldsigset, 0);
		458	}
		459
		460	static void req_send (aio_req req)
		461	{
		462	while (started < wanted && nreqs >= started)
		463	start_thread ();
		464
		465	++nreqs;
		466
		467	pthread_mutex_lock (&reqlock);
		468
		469	req->next = 0;
		470
		471	if (reqe)
		472	{
		473	reqe->next = req;
		474	reqe = req;
		475	}
		476	else
		477	reqe = reqs = req;
		478
		479	pthread_cond_signal (&reqwait);
		480	pthread_mutex_unlock (&reqlock);
		481
		482	if (nreqs > max_outstanding)
		483	for (;;)
		484	{
		485	poll_cb ();
		486
		487	if (nreqs <= max_outstanding)
		488	break;
		489
		490	poll_wait ();
		491	}
		492	}
		493
		494	static void end_thread (void)
257	{	495	{
258	aio_req req;	496	aio_req req;
		497	Newz (0, req, 1, aio_cb);
		498	req->type = REQ_QUIT;
259		499
260	/* then loop */	500	req_send (req);
261	while (read (reqpipe[0], (void *)&req, sizeof (req)) == sizeof (req))	501	}
		502
		503	static void min_parallel (int nthreads)
		504	{
		505	if (wanted < nthreads)
		506	wanted = nthreads;
		507	}
		508
		509	static void max_parallel (int nthreads)
		510	{
		511	int cur = started;
		512
		513	if (wanted > nthreads)
		514	wanted = nthreads;
		515
		516	while (cur > wanted)
		517	{
		518	end_thread ();
		519	cur--;
262	{	520	}
		521
		522	while (started > wanted)
		523	{
		524	poll_wait ();
		525	poll_cb ();
		526	}
		527	}
		528
		529	static void create_pipe ()
		530	{
		531	if (pipe (respipe))
		532	croak ("unable to initialize result pipe");
		533
		534	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
		535	croak ("cannot set result pipe to nonblocking mode");
		536
		537	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		538	croak ("cannot set result pipe to nonblocking mode");
		539	}
		540
		541	/*****************************************************************************/
		542	/* work around various missing functions */
		543
		544	#if !HAVE_PREADWRITE
		545	# define pread aio_pread
		546	# define pwrite aio_pwrite
		547
		548	/*
		549	* make our pread/pwrite safe against themselves, but not against
		550	* normal read/write by using a mutex. slows down execution a lot,
		551	* but that's your problem, not mine.
		552	*/
		553	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
		554
		555	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
		556	{
		557	ssize_t res;
		558	off_t ooffset;
		559
		560	pthread_mutex_lock (&preadwritelock);
		561	ooffset = lseek (fd, 0, SEEK_CUR);
		562	lseek (fd, offset, SEEK_SET);
		563	res = read (fd, buf, count);
		564	lseek (fd, ooffset, SEEK_SET);
		565	pthread_mutex_unlock (&preadwritelock);
		566
		567	return res;
		568	}
		569
		570	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
		571	{
		572	ssize_t res;
		573	off_t ooffset;
		574
		575	pthread_mutex_lock (&preadwritelock);
		576	ooffset = lseek (fd, 0, SEEK_CUR);
		577	lseek (fd, offset, SEEK_SET);
		578	res = write (fd, buf, count);
		579	lseek (fd, offset, SEEK_SET);
		580	pthread_mutex_unlock (&preadwritelock);
		581
		582	return res;
		583	}
		584	#endif
		585
		586	#if !HAVE_FDATASYNC
		587	# define fdatasync fsync
		588	#endif
		589
		590	#if !HAVE_READAHEAD
		591	# define readahead aio_readahead
		592
		593	static ssize_t readahead (int fd, off_t offset, size_t count)
		594	{
		595	char readahead_buf[4096];
		596
		597	while (count > 0)
		598	{
		599	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
		600
		601	pread (fd, readahead_buf, len, offset);
		602	offset += len;
		603	count -= len;
		604	}
		605
		606	errno = 0;
		607	}
		608	#endif
		609
		610	#if !HAVE_READDIR_R
		611	# define readdir_r aio_readdir_r
		612
		613	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
		614
		615	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
		616	{
		617	struct dirent *e;
		618	int errorno;
		619
		620	pthread_mutex_lock (&readdirlock);
		621
		622	e = readdir (dirp);
		623	errorno = errno;
		624
		625	if (e)
		626	{
		627	*res = ent;
		628	strcpy (ent->d_name, e->d_name);
		629	}
		630	else
		631	*res = 0;
		632
		633	pthread_mutex_unlock (&readdirlock);
		634
		635	errno = errorno;
		636	return e ? 0 : -1;
		637	}
		638	#endif
		639
		640	/* sendfile always needs emulation */
		641	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
		642	{
		643	ssize_t res;
		644
		645	if (!count)
		646	return 0;
		647
		648	#if HAVE_SENDFILE
		649	# if __linux
		650	res = sendfile (ofd, ifd, &offset, count);
		651
		652	# elif __freebsd
		653	/*
		654	* Of course, the freebsd sendfile is a dire hack with no thoughts
		655	* wasted on making it similar to other I/O functions.
		656	*/
		657	{
		658	off_t sbytes;
		659	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
		660
		661	if (res < 0 && sbytes)
		662	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
		663	res = sbytes;
		664	}
		665
		666	# elif __hpux
		667	res = sendfile (ofd, ifd, offset, count, 0, 0);
		668
		669	# elif __solaris
		670	{
		671	struct sendfilevec vec;
		672	size_t sbytes;
		673
		674	vec.sfv_fd = ifd;
		675	vec.sfv_flag = 0;
		676	vec.sfv_off = offset;
		677	vec.sfv_len = count;
		678
		679	res = sendfilev (ofd, &vec, 1, &sbytes);
		680
		681	if (res < 0 && sbytes)
		682	res = sbytes;
		683	}
		684
		685	# endif
		686	#else
		687	res = -1;
		688	errno = ENOSYS;
		689	#endif
		690
		691	if (res < 0
		692	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
		693	#if __solaris
		694	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
		695	#endif
		696	)
		697	)
		698	{
		699	/* emulate sendfile. this is a major pain in the ass */
		700	char buf[4096];
		701	res = 0;
		702
		703	while (count)
		704	{
		705	ssize_t cnt;
		706
		707	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
		708
		709	if (cnt <= 0)
		710	{
		711	if (cnt && !res) res = -1;
		712	break;
		713	}
		714
		715	cnt = write (ofd, buf, cnt);
		716
		717	if (cnt <= 0)
		718	{
		719	if (cnt && !res) res = -1;
		720	break;
		721	}
		722
		723	offset += cnt;
		724	res += cnt;
		725	count -= cnt;
		726	}
		727	}
		728
		729	return res;
		730	}
		731
		732	/* read a full directory */
		733	static int scandir_ (const char *path, void **namesp)
		734	{
		735	DIR *dirp = opendir (path);
		736	union
		737	{
		738	struct dirent d;
		739	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
		740	} u;
		741	struct dirent *entp;
		742	char *name, *names;
		743	int memlen = 4096;
		744	int memofs = 0;
		745	int res = 0;
		746	int errorno;
		747
		748	if (!dirp)
		749	return -1;
		750
		751	names = malloc (memlen);
		752
		753	for (;;)
		754	{
		755	errno = 0, readdir_r (dirp, &u.d, &entp);
		756
		757	if (!entp)
		758	break;
		759
		760	name = entp->d_name;
		761
		762	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
		763	{
		764	int len = strlen (name) + 1;
		765
		766	res++;
		767
		768	while (memofs + len > memlen)
		769	{
		770	memlen *= 2;
		771	names = realloc (names, memlen);
		772	if (!names)
		773	break;
		774	}
		775
		776	memcpy (names + memofs, name, len);
		777	memofs += len;
		778	}
		779	}
		780
		781	errorno = errno;
		782	closedir (dirp);
		783
		784	if (errorno)
		785	{
		786	free (names);
		787	errno = errorno;
		788	res = -1;
		789	}
		790
		791	*namesp = (void *)names;
		792	return res;
		793	}
		794
		795	/*****************************************************************************/
		796
		797	static void *aio_proc (void *thr_arg)
		798	{
		799	aio_req req;
		800	int type;
		801
		802	do
		803	{
		804	pthread_mutex_lock (&reqlock);
		805
		806	for (;;)
		807	{
		808	req = reqs;
		809
		810	if (reqs)
		811	{
		812	reqs = reqs->next;
		813	if (!reqs) reqe = 0;
		814	}
		815
		816	if (req)
		817	break;
		818
		819	pthread_cond_wait (&reqwait, &reqlock);
		820	}
		821
		822	pthread_mutex_unlock (&reqlock);
		823
263	errno = 0; /* strictly unnecessary */	824	errno = 0; /* strictly unnecessary */
		825	type = req->type; /* remember type for QUIT check */
264		826
		827	if (!(req->flags & FLAG_CANCELLED))
265	switch (req->type)	828	switch (type)
		829	{
		830	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
		831	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
		832
		833	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
		834	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
		835
		836	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
		837	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
		838	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
		839
		840	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
		841	case REQ_CLOSE: req->result = close (req->fd); break;
		842	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
		843	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
		844	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
		845	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
		846	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
		847
		848	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
		849	case REQ_FSYNC: req->result = fsync (req->fd); break;
		850	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
		851
		852	case REQ_SLEEP:
		853	{
		854	struct timeval tv;
		855
		856	tv.tv_sec = req->fd;
		857	tv.tv_usec = req->fd2;
		858
		859	req->result = select (0, 0, 0, 0, &tv);
		860	}
		861
		862	case REQ_GROUP:
		863	case REQ_NOP:
		864	case REQ_QUIT:
		865	break;
		866
		867	default:
		868	req->result = ENOSYS;
		869	break;
		870	}
		871
		872	req->errorno = errno;
		873
		874	pthread_mutex_lock (&reslock);
		875
		876	req->next = 0;
		877
		878	if (rese)
266	{	879	{
267	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;	880	rese->next = req;
268	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;	881	rese = req;
269	#if SYS_readahead
270	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
271	#else
272	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
273	#endif
274
275	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
276	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
277	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
278
279	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
280	case REQ_CLOSE: req->result = close (req->fd); break;
281	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
282
283	case REQ_FSYNC: req->result = fsync (req->fd); break;
284	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
285
286	case REQ_QUIT:
287	write (respipe[1], (void *)&req, sizeof (req));
288	return 0;
289
290	default:
291	req->result = ENOSYS;
292	break;
293	}	882	}
		883	else
		884	{
		885	rese = ress = req;
294		886
295	req->errorno = errno;	887	/* write a dummy byte to the pipe so fh becomes ready */
296	write (respipe[1], (void *)&req, sizeof (req));	888	write (respipe [1], &respipe, 1);
		889	}
		890
		891	pthread_mutex_unlock (&reslock);
297	}	892	}
		893	while (type != REQ_QUIT);
298		894
299	return 0;	895	return 0;
300	}	896	}
301		897
		898	/*****************************************************************************/
		899
		900	static void atfork_prepare (void)
		901	{
		902	pthread_mutex_lock (&reqlock);
		903	pthread_mutex_lock (&reslock);
		904	#if !HAVE_PREADWRITE
		905	pthread_mutex_lock (&preadwritelock);
		906	#endif
		907	#if !HAVE_READDIR_R
		908	pthread_mutex_lock (&readdirlock);
		909	#endif
		910	}
		911
		912	static void atfork_parent (void)
		913	{
		914	#if !HAVE_READDIR_R
		915	pthread_mutex_unlock (&readdirlock);
		916	#endif
		917	#if !HAVE_PREADWRITE
		918	pthread_mutex_unlock (&preadwritelock);
		919	#endif
		920	pthread_mutex_unlock (&reslock);
		921	pthread_mutex_unlock (&reqlock);
		922	}
		923
		924	static void atfork_child (void)
		925	{
		926	aio_req prv;
		927
		928	started = 0;
		929
		930	while (reqs)
		931	{
		932	prv = reqs;
		933	reqs = prv->next;
		934	req_free (prv);
		935	}
		936
		937	reqs = reqe = 0;
		938
		939	while (ress)
		940	{
		941	prv = ress;
		942	ress = prv->next;
		943	req_free (prv);
		944	}
		945
		946	ress = rese = 0;
		947
		948	close (respipe [0]);
		949	close (respipe [1]);
		950	create_pipe ();
		951
		952	atfork_parent ();
		953	}
		954
		955	#define dREQ \
		956	aio_req req; \
		957	int req_pri = next_pri; \
		958	next_pri = DEFAULT_PRI + PRI_BIAS; \
		959	\
		960	if (SvOK (callback) && !SvROK (callback)) \
		961	croak ("callback must be undef or of reference type"); \
		962	\
		963	Newz (0, req, 1, aio_cb); \
		964	if (!req) \
		965	croak ("out of memory during aio_req allocation"); \
		966	\
		967	req->callback = newSVsv (callback); \
		968	req->pri = req_pri
		969
		970	#define REQ_SEND \
		971	req_send (req); \
		972	\
		973	if (GIMME_V != G_VOID) \
		974	XPUSHs (req_sv (req, AIO_REQ_KLASS));
		975
302	MODULE = IO::AIO PACKAGE = IO::AIO	976	MODULE = IO::AIO PACKAGE = IO::AIO
303		977
		978	PROTOTYPES: ENABLE
		979
304	BOOT:	980	BOOT:
305	{	981	{
306	if (pipe (reqpipe) || pipe (respipe))	982	HV *stash = gv_stashpv ("IO::AIO", 1);
307	croak ("unable to initialize request or result pipe");	983	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		984	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		985	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
308		986
309	if (fcntl (reqpipe[1], F_SETFL, O_NONBLOCK))	987	create_pipe ();
310	croak ("cannot set result pipe to nonblocking mode");	988	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
311
312	if (fcntl (respipe[0], F_SETFL, O_NONBLOCK))
313	croak ("cannot set result pipe to nonblocking mode");
314	}	989	}
315		990
316	void	991	void
317	min_parallel(nthreads)	992	min_parallel (nthreads)
318	int nthreads	993	int nthreads
319	PROTOTYPE: $	994	PROTOTYPE: $
320	CODE:
321	while (nthreads > started)
322	start_thread ();
323		995
324	void	996	void
325	max_parallel(nthreads)	997	max_parallel (nthreads)
326	int nthreads	998	int nthreads
327	PROTOTYPE: $	999	PROTOTYPE: $
		1000
		1001	int
		1002	max_outstanding (nreqs)
		1003	int nreqs
		1004	PROTOTYPE: $
328	CODE:	1005	CODE:
329	{	1006	RETVAL = max_outstanding;
330	int cur = started;	1007	max_outstanding = nreqs;
331	while (cur > nthreads)
332	{
333	end_thread ();
334	cur--;
335	}
336		1008
337	while (started > nthreads)
338	{
339	poll_wait ();
340	poll_cb (aTHX);
341	}
342	}
343
344	void	1009	void
345	aio_open(pathname,flags,mode,callback)	1010	aio_open (pathname,flags,mode,callback=&PL_sv_undef)
346	SV * pathname	1011	SV * pathname
347	int flags	1012	int flags
348	int mode	1013	int mode
349	SV * callback	1014	SV * callback
350	PROTOTYPE: $$$$	1015	PROTOTYPE: $$$;$
351	CODE:	1016	PPCODE:
352	{	1017	{
353	aio_req req;	1018	dREQ;
354
355	Newz (0, req, 1, aio_cb);
356
357	if (!req)
358	croak ("out of memory during aio_req allocation");
359		1019
360	req->type = REQ_OPEN;	1020	req->type = REQ_OPEN;
361	req->data = newSVsv (pathname);	1021	req->data = newSVsv (pathname);
362	req->dataptr = SvPV_nolen (req->data);	1022	req->dataptr = SvPVbyte_nolen (req->data);
363	req->fd = flags;	1023	req->fd = flags;
364	req->mode = mode;	1024	req->mode = mode;
365	req->callback = SvREFCNT_inc (callback);
366		1025
367	send_req (req);	1026	REQ_SEND;
368	}	1027	}
369		1028
370	void	1029	void
371	aio_close(fh,callback)	1030	aio_close (fh,callback=&PL_sv_undef)
372	InputStream fh	1031	SV * fh
373	SV * callback	1032	SV * callback
374	PROTOTYPE: $$	1033	PROTOTYPE: $;$
375	ALIAS:	1034	ALIAS:
376	aio_close = REQ_CLOSE	1035	aio_close = REQ_CLOSE
377	aio_fsync = REQ_FSYNC	1036	aio_fsync = REQ_FSYNC
378	aio_fdatasync = REQ_FDATASYNC	1037	aio_fdatasync = REQ_FDATASYNC
379	CODE:	1038	PPCODE:
		1039	{
		1040	dREQ;
		1041
		1042	req->type = ix;
		1043	req->fh = newSVsv (fh);
		1044	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
		1045
		1046	REQ_SEND (req);
		1047	}
		1048
		1049	void
		1050	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
		1051	SV * fh
		1052	UV offset
		1053	UV length
		1054	SV * data
		1055	UV dataoffset
		1056	SV * callback
		1057	ALIAS:
		1058	aio_read = REQ_READ
		1059	aio_write = REQ_WRITE
		1060	PROTOTYPE: $$$$$;$
		1061	PPCODE:
380	{	1062	{
381	aio_req req;	1063	aio_req req;
		1064	STRLEN svlen;
		1065	char *svptr = SvPVbyte (data, svlen);
382		1066
383	Newz (0, req, 1, aio_cb);	1067	SvUPGRADE (data, SVt_PV);
		1068	SvPOK_on (data);
384		1069
385	if (!req)	1070	if (dataoffset < 0)
386	croak ("out of memory during aio_req allocation");	1071	dataoffset += svlen;
387		1072
388	req->type = ix;	1073	if (dataoffset < 0 || dataoffset > svlen)
389	req->fd = PerlIO_fileno (fh);	1074	croak ("data offset outside of string");
390	req->callback = SvREFCNT_inc (callback);
391		1075
392	send_req (req);	1076	if (ix == REQ_WRITE)
393	}	1077	{
394		1078	/* write: check length and adjust. */
395	void	1079	if (length < 0 || length + dataoffset > svlen)
396	aio_read(fh,offset,length,data,dataoffset,callback)	1080	length = svlen - dataoffset;
397	InputStream fh	1081	}
398	UV offset	1082	else
399	IV length	1083	{
400	SV * data	1084	/* read: grow scalar as necessary */
401	IV dataoffset	1085	svptr = SvGROW (data, length + dataoffset);
402	SV * callback	1086	}
403	PROTOTYPE: $$$$$$
404	CODE:
405	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
406
407	void
408	aio_write(fh,offset,length,data,dataoffset,callback)
409	OutputStream fh
410	UV offset
411	IV length
412	SV * data
413	IV dataoffset
414	SV * callback
415	PROTOTYPE: $$$$$$
416	CODE:
417	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
418
419	void
420	aio_readahead(fh,offset,length,callback)
421	InputStream fh
422	UV offset
423	IV length
424	SV * callback
425	PROTOTYPE: $$$$
426	CODE:
427	{
428	aio_req req;
429		1087
430	if (length < 0)	1088	if (length < 0)
431	croak ("length must not be negative");	1089	croak ("length must not be negative");
432		1090
433	Newz (0, req, 1, aio_cb);	1091	{
		1092	dREQ;
434		1093
435	if (!req)	1094	req->type = ix;
436	croak ("out of memory during aio_req allocation");	1095	req->fh = newSVsv (fh);
		1096	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
		1097	: IoOFP (sv_2io (fh)));
		1098	req->offset = offset;
		1099	req->length = length;
		1100	req->data = SvREFCNT_inc (data);
		1101	req->dataptr = (char *)svptr + dataoffset;
		1102
		1103	if (!SvREADONLY (data))
		1104	{
		1105	SvREADONLY_on (data);
		1106	req->data2ptr = (void *)data;
		1107	}
		1108
		1109	REQ_SEND;
		1110	}
		1111	}
		1112
		1113	void
		1114	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)
		1115	SV * out_fh
		1116	SV * in_fh
		1117	UV in_offset
		1118	UV length
		1119	SV * callback
		1120	PROTOTYPE: $$$$;$
		1121	PPCODE:
		1122	{
		1123	dREQ;
		1124
		1125	req->type = REQ_SENDFILE;
		1126	req->fh = newSVsv (out_fh);
		1127	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		1128	req->fh2 = newSVsv (in_fh);
		1129	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		1130	req->offset = in_offset;
		1131	req->length = length;
		1132
		1133	REQ_SEND;
		1134	}
		1135
		1136	void
		1137	aio_readahead (fh,offset,length,callback=&PL_sv_undef)
		1138	SV * fh
		1139	UV offset
		1140	IV length
		1141	SV * callback
		1142	PROTOTYPE: $$$;$
		1143	PPCODE:
		1144	{
		1145	dREQ;
437		1146
438	req->type = REQ_READAHEAD;	1147	req->type = REQ_READAHEAD;
		1148	req->fh = newSVsv (fh);
439	req->fd = PerlIO_fileno (fh);	1149	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
440	req->offset = offset;	1150	req->offset = offset;
441	req->length = length;	1151	req->length = length;
442	req->callback = SvREFCNT_inc (callback);
443		1152
444	send_req (req);	1153	REQ_SEND;
445	}	1154	}
446		1155
447	void	1156	void
448	aio_stat(fh_or_path,callback)	1157	aio_stat (fh_or_path,callback=&PL_sv_undef)
449	SV * fh_or_path	1158	SV * fh_or_path
450	SV * callback	1159	SV * callback
451	PROTOTYPE: $$
452	ALIAS:	1160	ALIAS:
		1161	aio_stat = REQ_STAT
453	aio_lstat = 1	1162	aio_lstat = REQ_LSTAT
454	CODE:	1163	PPCODE:
455	{	1164	{
456	aio_req req;	1165	dREQ;
457
458	Newz (0, req, 1, aio_cb);
459
460	if (!req)
461	croak ("out of memory during aio_req allocation");
462		1166
463	New (0, req->statdata, 1, Stat_t);	1167	New (0, req->statdata, 1, Stat_t);
464
465	if (!req->statdata)	1168	if (!req->statdata)
		1169	{
		1170	req_free (req);
466	croak ("out of memory during aio_req->statdata allocation");	1171	croak ("out of memory during aio_req->statdata allocation");
		1172	}
467		1173
468	if (SvPOK (fh_or_path))	1174	if (SvPOK (fh_or_path))
469	{	1175	{
470	req->type = ix ? REQ_LSTAT : REQ_STAT;	1176	req->type = ix;
471	req->data = newSVsv (fh_or_path);	1177	req->data = newSVsv (fh_or_path);
472	req->dataptr = SvPV_nolen (req->data);	1178	req->dataptr = SvPVbyte_nolen (req->data);
473	}	1179	}
474	else	1180	else
475	{	1181	{
476	req->type = REQ_FSTAT;	1182	req->type = REQ_FSTAT;
		1183	req->fh = newSVsv (fh_or_path);
477	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1184	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
478	}	1185	}
479		1186
480	req->callback = SvREFCNT_inc (callback);	1187	REQ_SEND;
481
482	send_req (req);
483	}	1188	}
484		1189
485	void	1190	void
486	aio_unlink(pathname,callback)	1191	aio_unlink (pathname,callback=&PL_sv_undef)
487	SV * pathname	1192	SV * pathname
488	SV * callback	1193	SV * callback
		1194	ALIAS:
		1195	aio_unlink = REQ_UNLINK
		1196	aio_rmdir = REQ_RMDIR
		1197	aio_readdir = REQ_READDIR
		1198	PPCODE:
		1199	{
		1200	dREQ;
		1201
		1202	req->type = ix;
		1203	req->data = newSVsv (pathname);
		1204	req->dataptr = SvPVbyte_nolen (req->data);
		1205
		1206	REQ_SEND;
		1207	}
		1208
		1209	void
		1210	aio_link (oldpath,newpath,callback=&PL_sv_undef)
		1211	SV * oldpath
		1212	SV * newpath
		1213	SV * callback
		1214	ALIAS:
		1215	aio_link = REQ_LINK
		1216	aio_symlink = REQ_SYMLINK
		1217	aio_rename = REQ_RENAME
		1218	PPCODE:
		1219	{
		1220	dREQ;
		1221
		1222	req->type = ix;
		1223	req->fh = newSVsv (oldpath);
		1224	req->data2ptr = SvPVbyte_nolen (req->fh);
		1225	req->data = newSVsv (newpath);
		1226	req->dataptr = SvPVbyte_nolen (req->data);
		1227
		1228	REQ_SEND;
		1229	}
		1230
		1231	void
		1232	aio_sleep (delay,callback=&PL_sv_undef)
		1233	double delay
		1234	SV * callback
		1235	PPCODE:
		1236	{
		1237	dREQ;
		1238
		1239	req->type = REQ_SLEEP;
		1240	req->fd = delay < 0. ? 0 : delay;
		1241	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
		1242
		1243	REQ_SEND;
		1244	}
		1245
		1246	void
		1247	aio_group (callback=&PL_sv_undef)
		1248	SV * callback
489	PROTOTYPE: $$	1249	PROTOTYPE: ;$
		1250	PPCODE:
		1251	{
		1252	dREQ;
		1253
		1254	req->type = REQ_GROUP;
		1255	req_send (req);
		1256
		1257	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1258	}
		1259
		1260	void
		1261	aio_nop (callback=&PL_sv_undef)
		1262	SV * callback
		1263	PPCODE:
		1264	{
		1265	dREQ;
		1266
		1267	req->type = REQ_NOP;
		1268
		1269	REQ_SEND;
		1270	}
		1271
		1272	#if 0
		1273
		1274	void
		1275	aio_pri (int pri = DEFAULT_PRI)
490	CODE:	1276	CODE:
491	{	1277	if (pri < PRI_MIN) pri = PRI_MIN;
492	aio_req req;	1278	if (pri > PRI_MAX) pri = PRI_MAX;
493		1279	next_pri = pri + PRI_BIAS;
494	Newz (0, req, 1, aio_cb);	1280
495		1281	#endif
496	if (!req)	1282
497	croak ("out of memory during aio_req allocation");	1283	void
498		1284	flush ()
499	req->type = REQ_UNLINK;	1285	PROTOTYPE:
500	req->data = newSVsv (pathname);	1286	CODE:
501	req->dataptr = SvPV_nolen (req->data);	1287	while (nreqs)
502	req->callback = SvREFCNT_inc (callback);	1288	{
503		1289	poll_wait ();
504	send_req (req);	1290	poll_cb ();
505	}	1291	}
		1292
		1293	void
		1294	poll()
		1295	PROTOTYPE:
		1296	CODE:
		1297	if (nreqs)
		1298	{
		1299	poll_wait ();
		1300	poll_cb ();
		1301	}
506		1302
507	int	1303	int
508	poll_fileno()	1304	poll_fileno()
509	PROTOTYPE:	1305	PROTOTYPE:
510	CODE:	1306	CODE:
511	RETVAL = respipe[0];	1307	RETVAL = respipe [0];
512	OUTPUT:	1308	OUTPUT:
513	RETVAL	1309	RETVAL
514		1310
515	int	1311	int
516	poll_cb(...)	1312	poll_cb(...)
517	PROTOTYPE:	1313	PROTOTYPE:
518	CODE:	1314	CODE:
519	RETVAL = poll_cb (aTHX);	1315	RETVAL = poll_cb ();
520	OUTPUT:	1316	OUTPUT:
521	RETVAL	1317	RETVAL
522		1318
523	void	1319	void
524	poll_wait()	1320	poll_wait()
525	PROTOTYPE:	1321	PROTOTYPE:
526	CODE:	1322	CODE:
		1323	if (nreqs)
527	poll_wait ();	1324	poll_wait ();
528		1325
529	int	1326	int
530	nreqs()	1327	nreqs()
531	PROTOTYPE:	1328	PROTOTYPE:
532	CODE:	1329	CODE:
533	RETVAL = nreqs;	1330	RETVAL = nreqs;
534	OUTPUT:	1331	OUTPUT:
535	RETVAL	1332	RETVAL
536		1333
		1334	PROTOTYPES: DISABLE
		1335
		1336	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1337
		1338	void
		1339	cancel (aio_req_ornot req)
		1340	PROTOTYPE:
		1341	CODE:
		1342	req_cancel (req);
		1343
		1344	void
		1345	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1346	CODE:
		1347	SvREFCNT_dec (req->callback);
		1348	req->callback = newSVsv (callback);
		1349
		1350	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1351
		1352	void
		1353	add (aio_req grp, ...)
		1354	PPCODE:
		1355	{
		1356	int i;
		1357	aio_req req;
		1358
		1359	if (grp->fd == 2)
		1360	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1361
		1362	for (i = 1; i < items; ++i )
		1363	{
		1364	if (GIMME_V != G_VOID)
		1365	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1366
		1367	req = SvAIO_REQ (ST (i));
		1368
		1369	if (req)
		1370	{
		1371	++grp->length;
		1372	req->grp = grp;
		1373
		1374	req->grp_prev = 0;
		1375	req->grp_next = grp->grp_first;
		1376
		1377	if (grp->grp_first)
		1378	grp->grp_first->grp_prev = req;
		1379
		1380	grp->grp_first = req;
		1381	}
		1382	}
		1383	}
		1384
		1385	void
		1386	result (aio_req grp, ...)
		1387	CODE:
		1388	{
		1389	int i;
		1390	AV *av = newAV ();
		1391
		1392	for (i = 1; i < items; ++i )
		1393	av_push (av, newSVsv (ST (i)));
		1394
		1395	SvREFCNT_dec (grp->data);
		1396	grp->data = (SV *)av;
		1397	}
		1398
		1399	void
		1400	feed_limit (aio_req grp, int limit)
		1401	CODE:
		1402	grp->fd2 = limit;
		1403	aio_grp_feed (grp);
		1404
		1405	void
		1406	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1407	CODE:
		1408	{
		1409	SvREFCNT_dec (grp->fh2);
		1410	grp->fh2 = newSVsv (callback);
		1411
		1412	if (grp->fd2 <= 0)
		1413	grp->fd2 = 2;
		1414
		1415	aio_grp_feed (grp);
		1416	}
		1417

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