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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.30 by root, Thu Aug 18 16:32:10 2005 UTC vs.
Revision 1.125 by root, Thu Jun 19 09:05:43 2008 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include <stddef.h>
9		10	#include <stdlib.h>
		11	#include <errno.h>
10	#include <sys/types.h>	12	#include <sys/types.h>
11	#include <sys/stat.h>	13	#include <sys/stat.h>
12
13	#include <unistd.h>	14	#include <limits.h>
14	#include <fcntl.h>	15	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	16	#include <sched.h>
17		17
18	#include <pthread.h>	18	/* perl namespace pollution */
		19	#undef VERSION
19		20
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	21	#ifdef _WIN32
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
23		22
24	#if __ia64	23	# define EIO_STRUCT_DIRENT Direntry_t
25	# define STACKSIZE 65536	24	# undef malloc
		25	# undef free
		26
		27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
26	#else	59	#else
27	# define STACKSIZE 4096	60
		61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
28	#endif	68	#endif
29		69
		70	/* perl stupidly overrides readdir and maybe others */
		71	/* with thread-unsafe versions, imagine that :( */
		72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
		83	#endif
		84
		85	static HV *stash;
		86	typedef SV SV8; /* byte-sv, used for argument-checking */
		87
		88	#define AIO_REQ_KLASS "IO::AIO::REQ"
		89	#define AIO_GRP_KLASS "IO::AIO::GRP"
		90
		91	#define EIO_REQ_MEMBERS \
		92	SV *callback; \
		93	SV *sv1, *sv2; \
		94	STRLEN stroffset; \
		95	SV *self;
		96
		97	#define EIO_NO_WRAPPERS 1
		98
		99	#include "libeio/eio.h"
		100
		101	static int req_invoke (eio_req *req);
		102	#define EIO_FINISH(req) req_invoke (req)
		103	static void aio_grp_feed (eio_req *grp);
		104	#define EIO_FEED(req) aio_grp_feed (req)
		105	static void req_destroy (eio_req *grp);
		106	#define EIO_DESTROY(req) req_destroy (req)
		107
30	enum {	108	enum {
31	REQ_QUIT,	109	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,
37	REQ_SYMLINK,
38	};	110	};
39		111
40	typedef struct aio_cb {	112	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		113
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	114	typedef eio_req *aio_req;
		115	typedef eio_req *aio_req_ornot;
59		116
60	static int started, wanted;	117	static SV *on_next_submit;
61	static volatile int nreqs;	118	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	119	static int max_outstanding;
63	static int respipe [2];
64		120
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	121	static int respipe_osf [2], respipe [2] = { -1, -1 };
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		122
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	123	static void req_destroy (aio_req req);
70	static volatile aio_req ress, rese; /* queue start, queue end */
71
72	static void free_req (aio_req req)	124	static void req_cancel (aio_req req);
73	{
74	if (req->data)
75	SvREFCNT_dec (req->data);
76		125
		126	static void want_poll (void)
		127	{
		128	/* write a dummy byte to the pipe so fh becomes ready */
		129	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		130	}
		131
		132	static void done_poll (void)
		133	{
		134	/* read any signals sent by the worker threads */
		135	char buf [4];
		136	while (respipe_read (respipe [0], buf, 4) == 4)
		137	;
		138	}
		139
		140	/* must be called at most once */
		141	static SV *req_sv (aio_req req, const char *klass)
		142	{
		143	if (!req->self)
		144	{
		145	req->self = (SV *)newHV ();
		146	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		147	}
		148
		149	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		150	}
		151
		152	static aio_req SvAIO_REQ (SV *sv)
		153	{
		154	MAGIC *mg;
		155
		156	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		157	croak ("object of class " AIO_REQ_KLASS " expected");
		158
		159	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		160
		161	return mg ? (aio_req)mg->mg_ptr : 0;
		162	}
		163
		164	static void aio_grp_feed (aio_req grp)
		165	{
		166	if (grp->sv2 && SvOK (grp->sv2))
		167	{
		168	dSP;
		169
		170	ENTER;
		171	SAVETMPS;
		172	PUSHMARK (SP);
		173	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		174	PUTBACK;
		175	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		176	SPAGAIN;
		177	FREETMPS;
		178	LEAVE;
		179	}
		180	}
		181
		182	static void req_submit (eio_req *req)
		183	{
		184	eio_submit (req);
		185
		186	if (on_next_submit)
		187	{
		188	dSP;
		189	SV *cb = sv_2mortal (on_next_submit);
		190
		191	on_next_submit = 0;
		192
		193	PUSHMARK (SP);
		194	PUTBACK;
		195	call_sv (cb, G_DISCARD | G_EVAL);
		196	}
		197	}
		198
		199	static int req_invoke (eio_req *req)
		200	{
		201	dSP;
		202
		203	if (req->flags & FLAG_SV2_RO_OFF)
		204	SvREADONLY_off (req->sv2);
		205
		206	if (!EIO_CANCELLED (req) && SvOK (req->callback))
		207	{
		208	ENTER;
		209	SAVETMPS;
		210	PUSHMARK (SP);
		211	EXTEND (SP, 1);
		212
		213	switch (req->type)
		214	{
		215	case EIO_READDIR:
		216	{
		217	SV *rv = &PL_sv_undef;
		218
		219	if (req->result >= 0)
		220	{
		221	int i;
		222	char *buf = req->ptr2;
		223	AV *av = newAV ();
		224
		225	av_extend (av, req->result - 1);
		226
		227	for (i = 0; i < req->result; ++i)
		228	{
		229	SV *sv = newSVpv (buf, 0);
		230
		231	av_store (av, i, sv);
		232	buf += SvCUR (sv) + 1;
		233	}
		234
		235	rv = sv_2mortal (newRV_noinc ((SV *)av));
		236	}
		237
		238	PUSHs (rv);
		239	}
		240	break;
		241
		242	case EIO_OPEN:
		243	{
		244	/* convert fd to fh */
		245	SV *fh = &PL_sv_undef;
		246
		247	if (req->result >= 0)
		248	{
		249	GV *gv = (GV *)sv_newmortal ();
		250	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		251	char sym [64];
		252	int symlen;
		253
		254	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		255	gv_init (gv, stash, sym, symlen, 0);
		256
		257	symlen = snprintf (
		258	sym,
		259	sizeof (sym),
		260	"%s&=%d",
		261	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		262	req->result
		263	);
		264
		265	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		266	fh = (SV *)gv;
		267	}
		268
		269	PUSHs (fh);
		270	}
		271	break;
		272
		273	case EIO_GROUP:
		274	req->int1 = 2; /* mark group as finished */
		275
		276	if (req->sv1)
		277	{
		278	int i;
		279	AV *av = (AV *)req->sv1;
		280
		281	EXTEND (SP, AvFILL (av) + 1);
		282	for (i = 0; i <= AvFILL (av); ++i)
		283	PUSHs (*av_fetch (av, i, 0));
		284	}
		285	break;
		286
		287	case EIO_NOP:
		288	case EIO_BUSY:
		289	break;
		290
		291	case EIO_READLINK:
		292	if (req->result > 0)
		293	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		294	break;
		295
		296	case EIO_STAT:
		297	case EIO_LSTAT:
		298	case EIO_FSTAT:
		299	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		300	PL_laststatval = req->result;
		301	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		302	PUSHs (sv_2mortal (newSViv (req->result)));
		303	break;
		304
		305	case EIO_READ:
		306	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		307	*SvEND (req->sv2) = 0;
		308	PUSHs (sv_2mortal (newSViv (req->result)));
		309	break;
		310
		311	case EIO_DUP2:
		312	if (req->result > 0)
		313	req->result = 0;
		314	/* FALLTHROUGH */
		315
		316	default:
		317	PUSHs (sv_2mortal (newSViv (req->result)));
		318	break;
		319	}
		320
		321	errno = req->errorno;
		322
		323	PUTBACK;
		324	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		325	SPAGAIN;
		326
		327	FREETMPS;
		328	LEAVE;
		329
		330	PUTBACK;
		331	}
		332
		333	return !!SvTRUE (ERRSV);
		334	}
		335
		336	static void req_destroy (aio_req req)
		337	{
77	if (req->fh)	338	if (req->self)
		339	{
		340	sv_unmagic (req->self, PERL_MAGIC_ext);
78	SvREFCNT_dec (req->fh);	341	SvREFCNT_dec (req->self);
		342	}
79		343
80	if (req->statdata)	344	SvREFCNT_dec (req->sv1);
81	Safefree (req->statdata);	345	SvREFCNT_dec (req->sv2);
82
83	if (req->callback)
84	SvREFCNT_dec (req->callback);	346	SvREFCNT_dec (req->callback);
85		347
86	Safefree (req);	348	Safefree (req);
87	}	349	}
88		350
		351	static void req_cancel_subs (aio_req grp)
		352	{
		353	aio_req sub;
		354
		355	if (grp->type != EIO_GROUP)
		356	return;
		357
		358	SvREFCNT_dec (grp->sv2);
		359	grp->sv2 = 0;
		360
		361	eio_grp_cancel (grp);
		362	}
		363
		364	#ifdef USE_SOCKETS_AS_HANDLES
		365	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		366	#else
		367	# define TO_SOCKET(x) (x)
		368	#endif
		369
89	static void	370	static void
90	poll_wait ()	371	create_respipe (void)
91	{	372	{
92	if (nreqs && !ress)	373	int old_readfd = respipe [0];
		374
		375	if (respipe [1] >= 0)
		376	respipe_close (TO_SOCKET (respipe [1]));
		377
		378	#ifdef _WIN32
		379	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		380	#else
		381	if (pipe (respipe))
		382	#endif
		383	croak ("unable to initialize result pipe");
		384
		385	if (old_readfd >= 0)
93	{	386	{
94	fd_set rfd;	387	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
95	FD_ZERO(&rfd);	388	croak ("unable to initialize result pipe(2)");
96	FD_SET(respipe [0], &rfd);
97		389
98	select (respipe [0] + 1, &rfd, 0, 0, 0);	390	respipe_close (respipe [0]);
		391	respipe [0] = old_readfd;
99	}	392	}
100	}
101		393
102	static int	394	#ifdef _WIN32
103	poll_cb ()	395	int arg = 1;
104	{	396	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
105	dSP;	397	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
106	int count = 0;	398	#else
107	int do_croak = 0;	399	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
108	aio_req req;	400	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		401	#endif
		402	croak ("unable to initialize result pipe(3)");
109		403
		404	respipe_osf [0] = TO_SOCKET (respipe [0]);
		405	respipe_osf [1] = TO_SOCKET (respipe [1]);
		406	}
		407
		408	static void poll_wait (void)
		409	{
		410	fd_set rfd;
		411
		412	while (eio_nreqs ())
		413	{
		414	int size;
		415
		416	X_LOCK (reslock);
		417	size = res_queue.size;
		418	X_UNLOCK (reslock);
		419
		420	if (size)
		421	return;
		422
		423	etp_maybe_start_thread ();
		424
		425	FD_ZERO (&rfd);
		426	FD_SET (respipe [0], &rfd);
		427
		428	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		429	}
		430	}
		431
		432	static int poll_cb (void)
		433	{
110	for (;;)	434	for (;;)
111	{	435	{
112	pthread_mutex_lock (&reslock);	436	int res = eio_poll ();
113	req = ress;
114		437
115	if (req)	438	if (res > 0)
116	{
117	ress = req->next;
118
119	if (!ress)
120	{
121	/* read any signals sent by the worker threads */
122	char buf [32];
123	while (read (respipe [0], buf, 32) == 32)
124	;
125
126	rese = 0;
127	}
128	}
129
130	pthread_mutex_unlock (&reslock);
131
132	if (!req)
133	break;
134
135	nreqs--;
136
137	if (req->type == REQ_QUIT)
138	started--;
139	else
140	{
141	int errorno = errno;
142	errno = req->errorno;
143
144	if (req->type == REQ_READ)
145	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
146
147	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
148	SvREADONLY_off (req->data);
149
150	if (req->statdata)
151	{
152	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
153	PL_laststatval = req->result;
154	PL_statcache = *(req->statdata);
155	}
156
157	ENTER;
158	PUSHMARK (SP);
159	XPUSHs (sv_2mortal (newSViv (req->result)));
160
161	if (req->type == REQ_OPEN)
162	{
163	/* convert fd to fh */
164	SV *fh;
165
166	PUTBACK;
167	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
168	SPAGAIN;
169
170	fh = SvREFCNT_inc (POPs);
171
172	PUSHMARK (SP);
173	XPUSHs (sv_2mortal (fh));
174	}
175
176	if (SvOK (req->callback))
177	{
178	PUTBACK;
179	call_sv (req->callback, G_VOID | G_EVAL);
180	SPAGAIN;
181
182	if (SvTRUE (ERRSV))
183	{
184	free_req (req);
185	croak (0);	439	croak (0);
186	}
187	}
188		440
189	LEAVE;	441	if (!max_outstanding || max_outstanding > eio_nreqs ())
		442	return res;
190		443
191	errno = errorno;	444	poll_wait ();
192	count++;
193	}
194
195	free_req (req);
196	}	445	}
197
198	return count;
199	}
200
201	static void *aio_proc(void *arg);
202
203	static void
204	start_thread (void)
205	{
206	sigset_t fullsigset, oldsigset;
207	pthread_t tid;
208	pthread_attr_t attr;
209
210	pthread_attr_init (&attr);
211	pthread_attr_setstacksize (&attr, STACKSIZE);
212	// pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
213
214	sigfillset (&fullsigset);
215	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
216
217	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
218	started++;
219
220	sigprocmask (SIG_SETMASK, &oldsigset, 0);
221	}
222
223	static void
224	send_req (aio_req req)
225	{
226	while (started < wanted && nreqs >= started)
227	start_thread ();
228
229	nreqs++;
230
231	pthread_mutex_lock (&reqlock);
232
233	req->next = 0;
234
235	if (reqe)
236	{
237	reqe->next = req;
238	reqe = req;
239	}
240	else
241	reqe = reqs = req;
242
243	pthread_cond_signal (&reqwait);
244	pthread_mutex_unlock (&reqlock);
245
246	if (nreqs > max_outstanding)
247	for (;;)
248	{
249	poll_cb ();
250
251	if (nreqs <= max_outstanding)
252	break;
253
254	poll_wait ();
255	}
256	}
257
258	static void
259	end_thread (void)
260	{
261	aio_req req;
262	Newz (0, req, 1, aio_cb);
263	req->type = REQ_QUIT;
264
265	send_req (req);
266	}
267
268	static void min_parallel (int nthreads)
269	{
270	if (wanted < nthreads)
271	wanted = nthreads;
272	}
273
274	static void max_parallel (int nthreads)
275	{
276	int cur = started;
277
278	if (wanted > nthreads)
279	wanted = nthreads;
280
281	while (cur > wanted)
282	{
283	end_thread ();
284	cur--;
285	}
286
287	while (started > wanted)
288	{
289	poll_wait ();
290	poll_cb ();
291	}
292	}
293
294	static void create_pipe ()
295	{
296	if (pipe (respipe))
297	croak ("unable to initialize result pipe");
298
299	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
300	croak ("cannot set result pipe to nonblocking mode");
301
302	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
303	croak ("cannot set result pipe to nonblocking mode");
304	}
305
306	static void atfork_prepare (void)
307	{
308	pthread_mutex_lock (&reqlock);
309	pthread_mutex_lock (&reslock);
310	}
311
312	static void atfork_parent (void)
313	{
314	pthread_mutex_unlock (&reslock);
315	pthread_mutex_unlock (&reqlock);
316	}	446	}
317		447
318	static void atfork_child (void)	448	static void atfork_child (void)
319	{	449	{
320	aio_req prv;
321
322	started = 0;
323
324	while (reqs)
325	{
326	prv = reqs;
327	reqs = prv->next;
328	free_req (prv);
329	}
330
331	reqs = reqe = 0;
332
333	while (ress)
334	{
335	prv = ress;
336	ress = prv->next;
337	free_req (prv);
338	}
339
340	ress = rese = 0;
341
342	close (respipe [0]);
343	close (respipe [1]);
344	create_pipe ();	450	create_respipe ();
345
346	atfork_parent ();
347	}
348
349	/*****************************************************************************/
350	/* work around various missing functions */
351
352	#if !HAVE_PREADWRITE
353	# define pread aio_pread
354	# define pwrite aio_pwrite
355
356	/*
357	* make our pread/pwrite safe against themselves, but not against
358	* normal read/write by using a mutex. slows down execution a lot,
359	* but that's your problem, not mine.
360	*/
361	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
362
363	static ssize_t
364	pread (int fd, void *buf, size_t count, off_t offset)
365	{
366	ssize_t res;
367	off_t ooffset;
368
369	pthread_mutex_lock (&iolock);
370	ooffset = lseek (fd, 0, SEEK_CUR);
371	lseek (fd, offset, SEEK_SET);
372	res = read (fd, buf, count);
373	lseek (fd, ooffset, SEEK_SET);
374	pthread_mutex_unlock (&iolock);
375
376	return res;
377	}
378
379	static ssize_t
380	pwrite (int fd, void *buf, size_t count, off_t offset)
381	{
382	ssize_t res;
383	off_t ooffset;
384
385	pthread_mutex_lock (&iolock);
386	ooffset = lseek (fd, 0, SEEK_CUR);
387	lseek (fd, offset, SEEK_SET);
388	res = write (fd, buf, count);
389	lseek (fd, offset, SEEK_SET);
390	pthread_mutex_unlock (&iolock);
391
392	return res;
393	}
394	#endif
395
396	#if !HAVE_FDATASYNC
397	# define fdatasync fsync
398	#endif
399
400	#if !HAVE_READAHEAD
401	# define readahead aio_readahead
402
403	static char readahead_buf[4096];
404
405	static ssize_t
406	readahead (int fd, off_t offset, size_t count)
407	{
408	while (count > 0)
409	{
410	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
411
412	pread (fd, readahead_buf, len, offset);
413	offset += len;
414	count -= len;
415	}
416
417	errno = 0;
418	}
419	#endif
420
421	/*****************************************************************************/
422
423	static void *
424	aio_proc (void *thr_arg)
425	{
426	aio_req req;
427	int type;
428
429	do
430	{
431	pthread_mutex_lock (&reqlock);
432
433	for (;;)
434	{
435	req = reqs;
436
437	if (reqs)
438	{
439	reqs = reqs->next;
440	if (!reqs) reqe = 0;
441	}
442
443	if (req)
444	break;
445
446	pthread_cond_wait (&reqwait, &reqlock);
447	}
448
449	pthread_mutex_unlock (&reqlock);
450
451	errno = 0; /* strictly unnecessary */
452
453	type = req->type;
454
455	switch (type)
456	{
457	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
458	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
459
460	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
461
462	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
463	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
464	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
465
466	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
467	case REQ_CLOSE: req->result = close (req->fd); break;
468	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
469	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
470	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
471
472	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
473	case REQ_FSYNC: req->result = fsync (req->fd); break;
474
475	case REQ_QUIT:
476	break;
477
478	default:
479	req->result = ENOSYS;
480	break;
481	}
482
483	req->errorno = errno;
484
485	pthread_mutex_lock (&reslock);
486
487	req->next = 0;
488
489	if (rese)
490	{
491	rese->next = req;
492	rese = req;
493	}
494	else
495	{
496	rese = ress = req;
497
498	/* write a dummy byte to the pipe so fh becomes ready */
499	write (respipe [1], &respipe, 1);
500	}
501
502	pthread_mutex_unlock (&reslock);
503	}
504	while (type != REQ_QUIT);
505
506	return 0;
507	}	451	}
508		452
509	#define dREQ \	453	#define dREQ \
510	aio_req req; \	454	aio_req req; \
		455	int req_pri = next_pri; \
		456	next_pri = EIO_PRI_DEFAULT; \
511	\	457	\
512	if (SvOK (callback) && !SvROK (callback)) \	458	if (SvOK (callback) && !SvROK (callback)) \
513	croak ("clalback must be undef or of reference type"); \	459	croak ("callback must be undef or of reference type"); \
514	\	460	\
515	Newz (0, req, 1, aio_cb); \	461	Newz (0, req, 1, eio_req); \
516	if (!req) \	462	if (!req) \
517	croak ("out of memory during aio_req allocation"); \	463	croak ("out of memory during eio_req allocation"); \
518	\	464	\
519	req->callback = newSVsv (callback);	465	req->callback = newSVsv (callback); \
		466	req->pri = req_pri
		467
		468	#define REQ_SEND \
		469	req_submit (req); \
		470	\
		471	if (GIMME_V != G_VOID) \
		472	XPUSHs (req_sv (req, AIO_REQ_KLASS));
520		473
521	MODULE = IO::AIO PACKAGE = IO::AIO	474	MODULE = IO::AIO PACKAGE = IO::AIO
522		475
523	PROTOTYPES: ENABLE	476	PROTOTYPES: ENABLE
524		477
525	BOOT:	478	BOOT:
526	{	479	{
527	create_pipe ();	480	stash = gv_stashpv ("IO::AIO", 1);
528	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
529	}
530		481
		482	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		483	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
		484	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		485	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		486	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		487	#ifndef _WIN32
		488	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		489	#endif
		490
		491	create_respipe ();
		492
		493	if (eio_init (want_poll, done_poll) < 0)
		494	croak ("IO::AIO: unable to initialise eio library");
		495
		496	/* atfork child called in fifo order, so before eio's handler */
		497	X_THREAD_ATFORK (0, 0, atfork_child);
		498	}
		499
531	void	500	void
532	min_parallel(nthreads)	501	max_poll_reqs (int nreqs)
533	int nthreads
534	PROTOTYPE: $	502	PROTOTYPE: $
		503	CODE:
		504	eio_set_max_poll_reqs (nreqs);
535		505
536	void	506	void
537	max_parallel(nthreads)	507	max_poll_time (double nseconds)
538	int nthreads
539	PROTOTYPE: $	508	PROTOTYPE: $
540
541	int
542	max_outstanding(nreqs)
543	int nreqs
544	PROTOTYPE: $
545	CODE:	509	CODE:
546	RETVAL = max_outstanding;	510	eio_set_max_poll_time (nseconds);
		511
		512	void
		513	min_parallel (int nthreads)
		514	PROTOTYPE: $
		515	CODE:
		516	eio_set_min_parallel (nthreads);
		517
		518	void
		519	max_parallel (int nthreads)
		520	PROTOTYPE: $
		521	CODE:
		522	eio_set_max_parallel (nthreads);
		523
		524	void
		525	max_idle (int nthreads)
		526	PROTOTYPE: $
		527	CODE:
		528	eio_set_max_idle (nthreads);
		529
		530	void
		531	max_outstanding (int maxreqs)
		532	PROTOTYPE: $
		533	CODE:
547	max_outstanding = nreqs;	534	max_outstanding = maxreqs;
548		535
549	void	536	void
550	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	537	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
551	SV * pathname
552	int flags
553	int mode
554	SV * callback
555	PROTOTYPE: $$$;$	538	PROTOTYPE: $$$;$
556	CODE:	539	PPCODE:
557	{	540	{
558	dREQ;	541	dREQ;
559		542
560	req->type = REQ_OPEN;	543	req->type = EIO_OPEN;
561	req->data = newSVsv (pathname);	544	req->sv1 = newSVsv (pathname);
562	req->dataptr = SvPVbyte_nolen (req->data);	545	req->ptr1 = SvPVbyte_nolen (req->sv1);
563	req->fd = flags;	546	req->int1 = flags;
564	req->mode = mode;	547	req->int2 = mode;
565		548
566	send_req (req);	549	REQ_SEND;
567	}	550	}
568		551
569	void	552	void
570	aio_close(fh,callback=&PL_sv_undef)	553	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
571	SV * fh
572	SV * callback
573	PROTOTYPE: $;$	554	PROTOTYPE: $;$
574	ALIAS:	555	ALIAS:
575	aio_close = REQ_CLOSE
576	aio_fsync = REQ_FSYNC	556	aio_fsync = EIO_FSYNC
577	aio_fdatasync = REQ_FDATASYNC	557	aio_fdatasync = EIO_FDATASYNC
578	CODE:	558	PPCODE:
579	{	559	{
580	dREQ;	560	dREQ;
581		561
582	req->type = ix;	562	req->type = ix;
583	req->fh = newSVsv (fh);	563	req->sv1 = newSVsv (fh);
584	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	564	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
585		565
586	send_req (req);	566	REQ_SEND (req);
587	}	567	}
588		568
589	void	569	void
		570	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		571	PROTOTYPE: $;$
		572	PPCODE:
		573	{
		574	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		575	dREQ;
		576
		577	if (close_pipe < 0)
		578	{
		579	int pipefd [2];
		580
		581	if (pipe (pipefd) < 0
		582	|| close (pipefd [1]) < 0
		583	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		584	abort (); /*D*/
		585
		586	close_pipe = pipefd [0];
		587	}
		588
		589	req->type = EIO_DUP2;
		590	req->int1 = close_pipe;
		591	req->sv2 = newSVsv (fh);
		592	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		593
		594	REQ_SEND (req);
		595	}
		596
		597	void
590	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	598	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
591	SV * fh
592	UV offset
593	IV length
594	SV * data
595	IV dataoffset
596	SV * callback
597	ALIAS:	599	ALIAS:
598	aio_read = REQ_READ	600	aio_read = EIO_READ
599	aio_write = REQ_WRITE	601	aio_write = EIO_WRITE
600	PROTOTYPE: $$$$$;$	602	PROTOTYPE: $$$$$;$
601	CODE:	603	PPCODE:
602	{	604	{
603	aio_req req;
604	STRLEN svlen;	605	STRLEN svlen;
605	char *svptr = SvPVbyte (data, svlen);	606	char *svptr = SvPVbyte (data, svlen);
		607	UV len = SvUV (length);
606		608
607	SvUPGRADE (data, SVt_PV);	609	SvUPGRADE (data, SVt_PV);
608	SvPOK_on (data);	610	SvPOK_on (data);
609		611
610	if (dataoffset < 0)	612	if (dataoffset < 0)
611	dataoffset += svlen;	613	dataoffset += svlen;
612		614
613	if (dataoffset < 0 || dataoffset > svlen)	615	if (dataoffset < 0 || dataoffset > svlen)
614	croak ("data offset outside of string");	616	croak ("dataoffset outside of data scalar");
615		617
616	if (ix == REQ_WRITE)	618	if (ix == EIO_WRITE)
617	{	619	{
618	/* write: check length and adjust. */	620	/* write: check length and adjust. */
619	if (length < 0 || length + dataoffset > svlen)	621	if (!SvOK (length) || len + dataoffset > svlen)
620	length = svlen - dataoffset;	622	len = svlen - dataoffset;
621	}	623	}
622	else	624	else
623	{	625	{
624	/* read: grow scalar as necessary */	626	/* read: grow scalar as necessary */
625	svptr = SvGROW (data, length + dataoffset);	627	svptr = SvGROW (data, len + dataoffset + 1);
626	}	628	}
627		629
628	if (length < 0)	630	if (len < 0)
629	croak ("length must not be negative");	631	croak ("length must not be negative");
630		632
631	{	633	{
632	dREQ;	634	dREQ;
633		635
634	req->type = ix;	636	req->type = ix;
635	req->fh = newSVsv (fh);	637	req->sv1 = newSVsv (fh);
636	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	638	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
637	: IoOFP (sv_2io (fh)));	639	: IoOFP (sv_2io (fh)));
		640	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
638	req->offset = offset;	641	req->size = len;
639	req->length = length;
640	req->data = SvREFCNT_inc (data);	642	req->sv2 = SvREFCNT_inc (data);
641	req->dataptr = (char *)svptr + dataoffset;	643	req->ptr2 = (char *)svptr + dataoffset;
		644	req->stroffset = dataoffset;
642		645
643	if (!SvREADONLY (data))	646	if (!SvREADONLY (data))
644	{	647	{
645	SvREADONLY_on (data);	648	SvREADONLY_on (data);
646	req->data2ptr = (void *)data;	649	req->flags |= FLAG_SV2_RO_OFF;
647	}	650	}
648		651
649	send_req (req);	652	REQ_SEND;
650	}	653	}
651	}	654	}
652		655
653	void	656	void
		657	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		658	PROTOTYPE: $$;$
		659	PPCODE:
		660	{
		661	SV *data;
		662	dREQ;
		663
		664	req->type = EIO_READLINK;
		665	req->sv1 = newSVsv (path);
		666	req->ptr1 = SvPVbyte_nolen (req->sv1);
		667
		668	REQ_SEND;
		669	}
		670
		671	void
		672	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
		673	PROTOTYPE: $$$$;$
		674	PPCODE:
		675	{
		676	dREQ;
		677
		678	req->type = EIO_SENDFILE;
		679	req->sv1 = newSVsv (out_fh);
		680	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
		681	req->sv2 = newSVsv (in_fh);
		682	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
		683	req->offs = SvVAL64 (in_offset);
		684	req->size = length;
		685
		686	REQ_SEND;
		687	}
		688
		689	void
654	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	690	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
655	SV * fh
656	UV offset
657	IV length
658	SV * callback
659	PROTOTYPE: $$$;$	691	PROTOTYPE: $$$;$
660	CODE:	692	PPCODE:
661	{	693	{
662	dREQ;	694	dREQ;
663		695
664	req->type = REQ_READAHEAD;	696	req->type = EIO_READAHEAD;
665	req->fh = newSVsv (fh);	697	req->sv1 = newSVsv (fh);
666	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	698	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
667	req->offset = offset;	699	req->offs = SvVAL64 (offset);
668	req->length = length;	700	req->size = length;
669		701
670	send_req (req);	702	REQ_SEND;
671	}	703	}
672		704
673	void	705	void
674	aio_stat(fh_or_path,callback=&PL_sv_undef)	706	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
675	SV * fh_or_path
676	SV * callback
677	ALIAS:	707	ALIAS:
678	aio_stat = REQ_STAT	708	aio_stat = EIO_STAT
679	aio_lstat = REQ_LSTAT	709	aio_lstat = EIO_LSTAT
680	CODE:	710	PPCODE:
681	{	711	{
682	dREQ;	712	dREQ;
683		713
684	New (0, req->statdata, 1, Stat_t);	714	req->sv1 = newSVsv (fh_or_path);
685	if (!req->statdata)
686	{
687	free_req (req);
688	croak ("out of memory during aio_req->statdata allocation");
689	}
690		715
691	if (SvPOK (fh_or_path))	716	if (SvPOK (req->sv1))
692	{	717	{
693	req->type = ix;	718	req->type = ix;
694	req->data = newSVsv (fh_or_path);
695	req->dataptr = SvPVbyte_nolen (req->data);	719	req->ptr1 = SvPVbyte_nolen (req->sv1);
696	}	720	}
697	else	721	else
698	{	722	{
699	req->type = REQ_FSTAT;	723	req->type = EIO_FSTAT;
700	req->fh = newSVsv (fh_or_path);
701	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	724	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		725	}
		726
		727	REQ_SEND;
		728	}
		729
		730	void
		731	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		732	PPCODE:
		733	{
		734	dREQ;
		735
		736	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		737	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		738	req->sv1 = newSVsv (fh_or_path);
		739
		740	if (SvPOK (req->sv1))
702	}	741	{
		742	req->type = EIO_UTIME;
		743	req->ptr1 = SvPVbyte_nolen (req->sv1);
		744	}
		745	else
		746	{
		747	req->type = EIO_FUTIME;
		748	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		749	}
703		750
704	send_req (req);	751	REQ_SEND;
705	}	752	}
706		753
707	void	754	void
		755	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		756	PPCODE:
		757	{
		758	dREQ;
		759
		760	req->sv1 = newSVsv (fh_or_path);
		761	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		762
		763	if (SvPOK (req->sv1))
		764	{
		765	req->type = EIO_TRUNCATE;
		766	req->ptr1 = SvPVbyte_nolen (req->sv1);
		767	}
		768	else
		769	{
		770	req->type = EIO_FTRUNCATE;
		771	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		772	}
		773
		774	REQ_SEND;
		775	}
		776
		777	void
		778	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		779	ALIAS:
		780	aio_chmod = EIO_CHMOD
		781	aio_mkdir = EIO_MKDIR
		782	PPCODE:
		783	{
		784	dREQ;
		785
		786	req->int2 = mode;
		787	req->sv1 = newSVsv (fh_or_path);
		788
		789	if (SvPOK (req->sv1))
		790	{
		791	req->type = ix;
		792	req->ptr1 = SvPVbyte_nolen (req->sv1);
		793	}
		794	else
		795	{
		796	req->type = EIO_FCHMOD;
		797	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		798	}
		799
		800	REQ_SEND;
		801	}
		802
		803	void
		804	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		805	PPCODE:
		806	{
		807	dREQ;
		808
		809	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		810	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		811	req->sv1 = newSVsv (fh_or_path);
		812
		813	if (SvPOK (req->sv1))
		814	{
		815	req->type = EIO_CHOWN;
		816	req->ptr1 = SvPVbyte_nolen (req->sv1);
		817	}
		818	else
		819	{
		820	req->type = EIO_FCHOWN;
		821	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		822	}
		823
		824	REQ_SEND;
		825	}
		826
		827	void
708	aio_unlink(pathname,callback=&PL_sv_undef)	828	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
709	SV * pathname
710	SV * callback
711	ALIAS:	829	ALIAS:
712	aio_unlink = REQ_UNLINK	830	aio_unlink = EIO_UNLINK
713	aio_rmdir = REQ_RMDIR	831	aio_rmdir = EIO_RMDIR
		832	aio_readdir = EIO_READDIR
714	CODE:	833	PPCODE:
715	{	834	{
716	dREQ;	835	dREQ;
717		836
718	req->type = ix;	837	req->type = ix;
719	req->data = newSVsv (pathname);	838	req->sv1 = newSVsv (pathname);
720	req->dataptr = SvPVbyte_nolen (req->data);	839	req->ptr1 = SvPVbyte_nolen (req->sv1);
		840
		841	REQ_SEND;
		842	}
		843
		844	void
		845	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		846	ALIAS:
		847	aio_link = EIO_LINK
		848	aio_symlink = EIO_SYMLINK
		849	aio_rename = EIO_RENAME
		850	PPCODE:
		851	{
		852	dREQ;
721		853
722	send_req (req);	854	req->type = ix;
723	}	855	req->sv1 = newSVsv (oldpath);
724		856	req->ptr1 = SvPVbyte_nolen (req->sv1);
725	void	857	req->sv2 = newSVsv (newpath);
726	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	858	req->ptr2 = SvPVbyte_nolen (req->sv2);
727	SV * oldpath
728	SV * newpath
729	SV * callback
730	CODE:
731	{
732	dREQ;
733		859
734	req->type = REQ_SYMLINK;	860	REQ_SEND;
735	req->fh = newSVsv (oldpath);	861	}
736	req->data2ptr = SvPVbyte_nolen (req->fh);	862
737	req->data = newSVsv (newpath);	863	void
738	req->dataptr = SvPVbyte_nolen (req->data);	864	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		865	PPCODE:
		866	{
		867	dREQ;
739		868
740	send_req (req);	869	req->type = EIO_MKNOD;
		870	req->sv1 = newSVsv (pathname);
		871	req->ptr1 = SvPVbyte_nolen (req->sv1);
		872	req->int2 = (mode_t)mode;
		873	req->offs = dev;
		874
		875	REQ_SEND;
741	}	876	}
742		877
743	void	878	void
		879	aio_busy (double delay, SV *callback=&PL_sv_undef)
		880	PPCODE:
		881	{
		882	dREQ;
		883
		884	req->type = EIO_BUSY;
		885	req->nv1 = delay < 0. ? 0. : delay;
		886
		887	REQ_SEND;
		888	}
		889
		890	void
		891	aio_group (SV *callback=&PL_sv_undef)
		892	PROTOTYPE: ;$
		893	PPCODE:
		894	{
		895	dREQ;
		896
		897	req->type = EIO_GROUP;
		898
		899	eio_submit (req);
		900	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		901	}
		902
		903	void
		904	aio_nop (SV *callback=&PL_sv_undef)
		905	ALIAS:
		906	aio_nop = EIO_NOP
		907	aio_sync = EIO_SYNC
		908	PPCODE:
		909	{
		910	dREQ;
		911
		912	req->type = ix;
		913
		914	REQ_SEND;
		915	}
		916
		917	int
		918	aioreq_pri (int pri = 0)
		919	PROTOTYPE: ;$
		920	CODE:
		921	RETVAL = next_pri;
		922	if (items > 0)
		923	{
		924	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		925	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		926	next_pri = pri;
		927	}
		928	OUTPUT:
		929	RETVAL
		930
		931	void
		932	aioreq_nice (int nice = 0)
		933	CODE:
		934	nice = next_pri - nice;
		935	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		936	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		937	next_pri = nice;
		938
		939	void
744	flush()	940	flush ()
745	PROTOTYPE:	941	PROTOTYPE:
746	CODE:	942	CODE:
747	while (nreqs)	943	while (eio_nreqs ())
748	{	944	{
749	poll_wait ();	945	poll_wait ();
750	poll_cb ();	946	poll_cb ();
751	}	947	}
752		948
753	void	949	int
754	poll()	950	poll()
755	PROTOTYPE:	951	PROTOTYPE:
756	CODE:	952	CODE:
757	if (nreqs)
758	{
759	poll_wait ();	953	poll_wait ();
760	poll_cb ();	954	RETVAL = poll_cb ();
761	}	955	OUTPUT:
		956	RETVAL
762		957
763	int	958	int
764	poll_fileno()	959	poll_fileno()
765	PROTOTYPE:	960	PROTOTYPE:
766	CODE:	961	CODE:
…		…
778		973
779	void	974	void
780	poll_wait()	975	poll_wait()
781	PROTOTYPE:	976	PROTOTYPE:
782	CODE:	977	CODE:
783	if (nreqs)
784	poll_wait ();	978	poll_wait ();
785		979
786	int	980	int
787	nreqs()	981	nreqs()
788	PROTOTYPE:	982	PROTOTYPE:
789	CODE:	983	CODE:
790	RETVAL = nreqs;	984	RETVAL = eio_nreqs ();
791	OUTPUT:	985	OUTPUT:
792	RETVAL	986	RETVAL
793		987
		988	int
		989	nready()
		990	PROTOTYPE:
		991	CODE:
		992	RETVAL = eio_nready ();
		993	OUTPUT:
		994	RETVAL
		995
		996	int
		997	npending()
		998	PROTOTYPE:
		999	CODE:
		1000	RETVAL = eio_npending ();
		1001	OUTPUT:
		1002	RETVAL
		1003
		1004	int
		1005	nthreads()
		1006	PROTOTYPE:
		1007	CODE:
		1008	RETVAL = eio_nthreads ();
		1009	OUTPUT:
		1010	RETVAL
		1011
		1012	void _on_next_submit (SV *cb)
		1013	CODE:
		1014	SvREFCNT_dec (on_next_submit);
		1015	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1016
		1017	PROTOTYPES: DISABLE
		1018
		1019	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1020
		1021	void
		1022	cancel (aio_req_ornot req)
		1023	CODE:
		1024	eio_cancel (req);
		1025
		1026	void
		1027	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1028	CODE:
		1029	SvREFCNT_dec (req->callback);
		1030	req->callback = newSVsv (callback);
		1031
		1032	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1033
		1034	void
		1035	add (aio_req grp, ...)
		1036	PPCODE:
		1037	{
		1038	int i;
		1039
		1040	if (grp->int1 == 2)
		1041	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1042
		1043	for (i = 1; i < items; ++i )
		1044	{
		1045	aio_req req;
		1046
		1047	if (GIMME_V != G_VOID)
		1048	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1049
		1050	req = SvAIO_REQ (ST (i));
		1051
		1052	if (req)
		1053	eio_grp_add (grp, req);
		1054	}
		1055	}
		1056
		1057	void
		1058	cancel_subs (aio_req_ornot req)
		1059	CODE:
		1060	req_cancel_subs (req);
		1061
		1062	void
		1063	result (aio_req grp, ...)
		1064	CODE:
		1065	{
		1066	int i;
		1067	AV *av;
		1068
		1069	grp->errorno = errno;
		1070
		1071	av = newAV ();
		1072
		1073	for (i = 1; i < items; ++i )
		1074	av_push (av, newSVsv (ST (i)));
		1075
		1076	SvREFCNT_dec (grp->sv1);
		1077	grp->sv1 = (SV *)av;
		1078	}
		1079
		1080	void
		1081	errno (aio_req grp, int errorno = errno)
		1082	CODE:
		1083	grp->errorno = errorno;
		1084
		1085	void
		1086	limit (aio_req grp, int limit)
		1087	CODE:
		1088	eio_grp_limit (grp, limit);
		1089
		1090	void
		1091	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1092	CODE:
		1093	{
		1094	SvREFCNT_dec (grp->sv2);
		1095	grp->sv2 = newSVsv (callback);
		1096
		1097	if (grp->int2 <= 0)
		1098	grp->int2 = 2;
		1099
		1100	eio_grp_limit (grp, grp->int2);
		1101	}
		1102

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