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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.10 by root, Wed Jul 13 00:13:09 2005 UTC vs.
Revision 1.189 by root, Mon Jul 18 01:27:03 2011 UTC

		1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
5	#define _XOPEN_SOURCE 500	9	#include "schmorp.h"
6		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
7	#include <sys/types.h>	14	#include <sys/types.h>
8	#include <sys/stat.h>	15	#include <sys/stat.h>
9
10	#include <unistd.h>	16	#include <limits.h>
11	#include <fcntl.h>	17	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	18	#include <sched.h>
14	#if __linux	19
		20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
15	#include <sys/syscall.h>	21	# include <sys/mman.h>
16	#endif	22	#endif
17		23
18	#include <pthread.h>	24	/* perl namespace pollution */
		25	#undef VERSION
19		26
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	27	/* perl stupidly overrides readdir and maybe others */
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	28	/* with thread-unsafe versions, imagine that :( */
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	29	#undef readdir
		30	#undef opendir
		31	#undef closedir
23		32
24	#if __ia64	33	#ifdef _WIN32
25	# define STACKSIZE 65536	34
		35	// perl overrides all those nice libc functions
		36
		37	#undef malloc
		38	#undef free
		39	#undef open
		40	#undef read
		41	#undef write
		42	#undef send
		43	#undef recv
		44	#undef stat
		45	#undef lstat
		46	#undef fstat
		47	#undef truncate
		48	#undef ftruncate
		49	#undef open
		50	#undef link
		51	#undef close
		52	#undef unlink
		53	#undef mkdir
		54	#undef rmdir
		55	#undef rename
		56	#undef lseek
		57	#undef opendir
		58	#undef readdir
		59	#undef closedir
		60	#undef chmod
		61	#undef fchmod
		62	#undef dup
		63	#undef dup2
		64	#undef abort
		65	#undef pipe
		66
26	#else	67	#else
27	# define STACKSIZE 4096	68
		69	#include <sys/time.h>
		70	#include <sys/select.h>
		71	#include <unistd.h>
		72	#include <utime.h>
		73	#include <signal.h>
		74
		75	#endif
		76
		77	#define EIO_STRUCT_STAT Stat_t
		78
		79	/* use NV for 32 bit perls as it allows larger offsets */
		80	#if IVSIZE >= 8
		81	# define VAL64 IV
		82	# define SvVAL64 SvIV
		83	# define newSVval64 newSViv
		84	#else
		85	# define VAL64 NV
		86	# define SvVAL64 SvNV
		87	# define newSVval64 newSVnv
		88	#endif
		89
		90	/*****************************************************************************/
		91
		92	#if __GNUC__ >= 3
		93	# define expect(expr,value) __builtin_expect ((expr),(value))
		94	#else
		95	# define expect(expr,value) (expr)
		96	#endif
		97
		98	#define expect_false(expr) expect ((expr) != 0, 0)
		99	#define expect_true(expr) expect ((expr) != 0, 1)
		100
		101	/*****************************************************************************/
		102
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		108
		109	#define EIO_REQ_MEMBERS \
		110	SV *callback; \
		111	SV *sv1, *sv2; \
		112	STRLEN stroffset; \
		113	SV *self;
		114
		115	#define EIO_NO_WRAPPERS 1
		116
		117	#include "libeio/config.h"
		118	#include "libeio/eio.h"
		119
		120	static int req_invoke (eio_req *req);
		121	#define EIO_FINISH(req) req_invoke (req)
		122	static void req_destroy (eio_req *grp);
		123	#define EIO_DESTROY(req) req_destroy (req)
		124
		125	#include "libeio/eio.c"
		126
		127	/* Linux/others */
		128	#ifndef O_ASYNC
		129	# define O_ASYNC 0
		130	#endif
		131	#ifndef O_DIRECT
		132	# define O_DIRECT 0
		133	#endif
		134	#ifndef O_NOATIME
		135	# define O_NOATIME 0
		136	#endif
		137
		138	/* POSIX */
		139	#ifndef O_CLOEXEC
		140	# define O_CLOEXEC 0
		141	#endif
		142	#ifndef O_NOFOLLOW
		143	# define O_NOFOLLOW 0
		144	#endif
		145	#ifndef O_NOCTTY
		146	# define O_NOCTTY 0
		147	#endif
		148	#ifndef O_NONBLOCK
		149	# define O_NONBLOCK 0
		150	#endif
		151	#ifndef O_EXEC
		152	# define O_EXEC 0
		153	#endif
		154	#ifndef O_SEARCH
		155	# define O_SEARCH 0
		156	#endif
		157	#ifndef O_DIRECTORY
		158	# define O_DIRECTORY 0
		159	#endif
		160	#ifndef O_DSYNC
		161	# define O_DSYNC 0
		162	#endif
		163	#ifndef O_RSYNC
		164	# define O_RSYNC 0
		165	#endif
		166	#ifndef O_SYNC
		167	# define O_SYNC 0
		168	#endif
		169	#ifndef O_TTY_INIT
		170	# define O_TTY_INIT 0
		171	#endif
		172
		173	#ifndef POSIX_FADV_NORMAL
		174	# define POSIX_FADV_NORMAL 0
		175	#endif
		176	#ifndef POSIX_FADV_SEQUENTIAL
		177	# define POSIX_FADV_SEQUENTIAL 0
		178	#endif
		179	#ifndef POSIX_FADV_RANDOM
		180	# define POSIX_FADV_RANDOM 0
		181	#endif
		182	#ifndef POSIX_FADV_NOREUSE
		183	# define POSIX_FADV_NOREUSE 0
		184	#endif
		185	#ifndef POSIX_FADV_WILLNEED
		186	# define POSIX_FADV_WILLNEED 0
		187	#endif
		188	#ifndef POSIX_FADV_DONTNEED
		189	# define POSIX_FADV_DONTNEED 0
		190	#endif
		191
		192	#if !HAVE_POSIX_FADVISE
		193	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		194	#endif
		195
		196	#ifndef POSIX_MADV_NORMAL
		197	# define POSIX_MADV_NORMAL 0
		198	#endif
		199	#ifndef POSIX_MADV_SEQUENTIAL
		200	# define POSIX_MADV_SEQUENTIAL 0
		201	#endif
		202	#ifndef POSIX_MADV_RANDOM
		203	# define POSIX_MADV_RANDOM 0
		204	#endif
		205	#ifndef POSIX_MADV_WILLNEED
		206	# define POSIX_MADV_WILLNEED 0
		207	#endif
		208	#ifndef POSIX_MADV_DONTNEED
		209	# define POSIX_MADV_DONTNEED 0
		210	#endif
		211
		212	#if !HAVE_POSIX_MADVISE
		213	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		214	#endif
		215
		216	#ifndef PROT_NONE
		217	# define PROT_NONE 0
		218	#endif
		219	#ifndef PROT_READ
		220	# define PROT_READ 0
		221	#endif
		222	#ifndef PROT_WRITE
		223	# define PROT_READ 0
		224	#endif
		225	#ifndef PROT_EXEC
		226	# define PROT_EXEC 0
		227	#endif
		228
		229	#ifndef ST_RDONLY
		230	# define ST_RDONLY 0
		231	#endif
		232	#ifndef ST_NOSUID
		233	# define ST_NOSUID 0
		234	#endif
		235	#ifndef ST_NODEV
		236	# define ST_NODEV 0
		237	#endif
		238	#ifndef ST_NOEXEC
		239	# define ST_NOEXEC 0
		240	#endif
		241	#ifndef ST_SYNCHRONOUS
		242	# define ST_SYNCHRONOUS 0
		243	#endif
		244	#ifndef ST_MANDLOCK
		245	# define ST_MANDLOCK 0
		246	#endif
		247	#ifndef ST_WRITE
		248	# define ST_WRITE 0
		249	#endif
		250	#ifndef ST_APPEND
		251	# define ST_APPEND 0
		252	#endif
		253	#ifndef ST_IMMUTABLE
		254	# define ST_IMMUTABLE 0
		255	#endif
		256	#ifndef ST_NOATIME
		257	# define ST_NOATIME 0
		258	#endif
		259	#ifndef ST_NODIRATIME
		260	# define ST_NODIRATIME 0
		261	#endif
		262	#ifndef ST_RELATIME
		263	# define ST_RELATIME 0
		264	#endif
		265
		266	#ifndef S_IFIFO
		267	# define S_IFIFO 0
		268	#endif
		269	#ifndef S_IFCHR
		270	# define S_IFCHR 0
		271	#endif
		272	#ifndef S_IFBLK
		273	# define S_IFBLK 0
		274	#endif
		275	#ifndef S_IFLNK
		276	# define S_IFLNK 0
		277	#endif
		278	#ifndef S_IFREG
		279	# define S_IFREG 0
		280	#endif
		281	#ifndef S_IFDIR
		282	# define S_IFDIR 0
		283	#endif
		284	#ifndef S_IFWHT
		285	# define S_IFWHT 0
		286	#endif
		287	#ifndef S_IFSOCK
		288	# define S_IFSOCK 0
		289	#endif
		290
		291	#ifndef MAP_ANONYMOUS
		292	# ifdef MAP_ANON
		293	# define MAP_ANONYMOUS MAP_ANON
		294	# else
		295	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
		296	# endif
		297	#endif
		298	#ifndef MAP_HUGETLB
		299	# define MAP_HUGETLB 0
		300	#endif
		301	#ifndef MAP_LOCKED
		302	# define MAP_LOCKED 0
		303	#endif
		304	#ifndef MAP_NORESERVE
		305	# define MAP_NORESERVE 0
		306	#endif
		307	#ifndef MAP_POPULATE
		308	# define MAP_POPULATE 0
		309	#endif
		310	#ifndef MAP_NONBLOCK
		311	# define MAP_NONBLOCK 0
		312	#endif
		313
		314	#ifndef makedev
		315	# define makedev(maj,min) (((maj) << 8) | (min))
		316	#endif
		317	#ifndef major
		318	# define major(dev) ((dev) >> 8)
		319	#endif
		320	#ifndef minor
		321	# define minor(dev) ((dev) & 0xff)
		322	#endif
		323
		324	#ifndef PAGESIZE
		325	# define PAGESIZE sysconf (_SC_PAGESIZE)
28	#endif	326	#endif
29		327
30	enum {	328	enum {
31	REQ_QUIT,	329	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, REQ_UNLINK,
35	REQ_FSYNC, REQ_FDATASYNC,
36	};	330	};
37		331
38	typedef struct aio_cb {
39	struct aio_cb *volatile next;
40
41	int type;
42
43	int fd;
44	off_t offset;
45	size_t length;
46	ssize_t result;
47	mode_t mode; /* open */
48	int errorno;
49	SV *data, *callback;
50	void *dataptr;
51	STRLEN dataoffset;
52
53	Stat_t *statdata;
54	} aio_cb;
55
56	typedef aio_cb *aio_req;	332	typedef eio_req *aio_req;
		333	typedef eio_req *aio_req_ornot;
57		334
58	static int started;	335	static SV *on_next_submit;
59	static int nreqs;	336	static int next_pri = EIO_PRI_DEFAULT;
60	static int max_outstanding = 1<<30;	337	static int max_outstanding;
61	static int respipe [2];
62		338
63	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	339	static s_epipe respipe;
64	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
65	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
66		340
67	static volatile aio_req reqs, reqe; /* queue start, queue end */	341	static void req_destroy (aio_req req);
68	static volatile aio_req ress, rese; /* queue start, queue end */	342	static void req_cancel (aio_req req);
69		343
70	static void	344	static void want_poll (void)
71	poll_wait ()
72	{	345	{
73	if (!nreqs)	346	/* write a dummy byte to the pipe so fh becomes ready */
74	return;	347	s_epipe_signal (&respipe);
75
76	fd_set rfd;
77	FD_ZERO(&rfd);
78	FD_SET(respipe [0], &rfd);
79
80	select (respipe [0] + 1, &rfd, 0, 0, 0);
81	}	348	}
82		349
83	static int	350	static void done_poll (void)
84	poll_cb ()
85	{	351	{
86	dSP;
87	int count = 0;
88	aio_req req;
89
90	{
91	/* read and signals sent by the worker threads */	352	/* read any signals sent by the worker threads */
92	char buf [32];	353	s_epipe_drain (&respipe);
93	while (read (respipe [0], buf, 32) > 0)	354	}
94	;
95	}
96		355
97	for (;;)	356	/* must be called at most once */
		357	static SV *req_sv (aio_req req, HV *stash)
		358	{
		359	if (!req->self)
98	{	360	{
99	pthread_mutex_lock (&reslock);	361	req->self = (SV *)newHV ();
		362	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		363	}
100		364
101	req = ress;	365	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		366	}
102		367
103	if (ress)	368	static aio_req SvAIO_REQ (SV *sv)
		369	{
		370	MAGIC *mg;
		371
		372	if (!SvROK (sv)
		373	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		374	&& SvSTASH (SvRV (sv)) != aio_req_stash
		375	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		376	croak ("object of class IO::AIO::REQ expected");
		377
		378	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		379
		380	return mg ? (aio_req)mg->mg_ptr : 0;
		381	}
		382
		383	static void aio_grp_feed (aio_req grp)
		384	{
		385	if (grp->sv2 && SvOK (grp->sv2))
		386	{
		387	dSP;
		388
		389	ENTER;
		390	SAVETMPS;
		391	PUSHMARK (SP);
		392	XPUSHs (req_sv (grp, aio_grp_stash));
		393	PUTBACK;
		394	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		395	SPAGAIN;
		396	FREETMPS;
		397	LEAVE;
		398	}
		399	}
		400
		401	static void req_submit (eio_req *req)
		402	{
		403	eio_submit (req);
		404
		405	if (expect_false (on_next_submit))
		406	{
		407	dSP;
		408	SV *cb = sv_2mortal (on_next_submit);
		409
		410	on_next_submit = 0;
		411
		412	PUSHMARK (SP);
		413	PUTBACK;
		414	call_sv (cb, G_DISCARD | G_EVAL);
		415	}
		416	}
		417
		418	static int req_invoke (eio_req *req)
		419	{
		420	if (req->flags & FLAG_SV2_RO_OFF)
		421	SvREADONLY_off (req->sv2);
		422
		423	if (!EIO_CANCELLED (req) && req->callback)
		424	{
		425	dSP;
		426	static SV *sv_result_cache; /* caches the result integer SV */
		427	SV *sv_result;
		428
		429	ENTER;
		430	SAVETMPS;
		431	PUSHMARK (SP);
		432	EXTEND (SP, 1);
		433
		434	/* do not recreate the result IV from scratch each time */
		435	if (expect_true (sv_result_cache))
104	{	436	{
105	ress = ress->next;	437	sv_result = sv_result_cache; sv_result_cache = 0;
106	if (!ress) rese = 0;	438	SvIV_set (sv_result, req->result);
107	}	439	SvIOK_only (sv_result);
108
109	pthread_mutex_unlock (&reslock);
110
111	if (!req)
112	break;
113
114	nreqs--;
115
116	if (req->type == REQ_QUIT)
117	started--;
118	else
119	{
120	int errorno = errno;
121	errno = req->errorno;
122
123	if (req->type == REQ_READ)
124	SvCUR_set (req->data, req->dataoffset
125	+ req->result > 0 ? req->result : 0);
126
127	if (req->data)
128	SvREFCNT_dec (req->data);
129
130	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
131	{
132	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
133	PL_laststatval = req->result;
134	PL_statcache = *(req->statdata);
135
136	Safefree (req->statdata);
137	}
138
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141
142	if (req->type == REQ_OPEN)
143	{
144	/* convert fd to fh */
145	SV *fh;
146
147	PUTBACK;
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149	SPAGAIN;
150
151	fh = POPs;
152
153	PUSHMARK (SP);
154	XPUSHs (fh);
155	}
156
157	if (SvOK (req->callback))
158	{
159	PUTBACK;
160	call_sv (req->callback, G_VOID | G_EVAL);
161	SPAGAIN;
162	}
163
164	if (req->callback)
165	SvREFCNT_dec (req->callback);
166
167	errno = errorno;
168	count++;
169	}
170
171	Safefree (req);
172	}
173
174	return count;
175	}
176
177	static void *aio_proc(void *arg);
178
179	static void
180	start_thread (void)
181	{
182	sigset_t fullsigset, oldsigset;
183	pthread_t tid;
184	pthread_attr_t attr;
185
186	pthread_attr_init (&attr);
187	pthread_attr_setstacksize (&attr, STACKSIZE);
188	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
189
190	sigfillset (&fullsigset);
191	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
192
193	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
194	started++;
195
196	sigprocmask (SIG_SETMASK, &oldsigset, 0);
197	}
198
199	static void
200	send_req (aio_req req)
201	{
202	nreqs++;
203
204	pthread_mutex_lock (&reqlock);
205
206	req->next = 0;
207
208	if (reqe)
209	{
210	reqe->next = req;
211	reqe = req;
212	}
213	else
214	reqe = reqs = req;
215
216	pthread_cond_signal (&reqwait);
217	pthread_mutex_unlock (&reqlock);
218
219	while (nreqs > max_outstanding)
220	{
221	poll_wait ();
222	poll_cb ();
223	}
224	}
225
226	static void
227	end_thread (void)
228	{
229	aio_req req;
230	New (0, req, 1, aio_cb);
231	req->type = REQ_QUIT;
232
233	send_req (req);
234	}
235
236	static void
237	read_write (int dowrite, int fd, off_t offset, size_t length,
238	SV *data, STRLEN dataoffset, SV *callback)
239	{
240	aio_req req;
241	STRLEN svlen;
242	char *svptr = SvPV (data, svlen);
243
244	SvUPGRADE (data, SVt_PV);
245	SvPOK_on (data);
246
247	if (dataoffset < 0)
248	dataoffset += svlen;
249
250	if (dataoffset < 0 || dataoffset > svlen)
251	croak ("data offset outside of string");
252
253	if (dowrite)
254	{
255	/* write: check length and adjust. */
256	if (length < 0 || length + dataoffset > svlen)
257	length = svlen - dataoffset;
258	}
259	else
260	{
261	/* read: grow scalar as necessary */
262	svptr = SvGROW (data, length + dataoffset);
263	}
264
265	if (length < 0)
266	croak ("length must not be negative");
267
268	Newz (0, req, 1, aio_cb);
269
270	if (!req)
271	croak ("out of memory during aio_req allocation");
272
273	req->type = dowrite ? REQ_WRITE : REQ_READ;
274	req->fd = fd;
275	req->offset = offset;
276	req->length = length;
277	req->data = SvREFCNT_inc (data);
278	req->dataptr = (char *)svptr + dataoffset;
279	req->callback = SvREFCNT_inc (callback);
280
281	send_req (req);
282	}
283
284	static void *
285	aio_proc (void *thr_arg)
286	{
287	aio_req req;
288	int type;
289
290	do
291	{
292	pthread_mutex_lock (&reqlock);
293
294	for (;;)
295	{
296	req = reqs;
297
298	if (reqs)
299	{
300	reqs = reqs->next;
301	if (!reqs) reqe = 0;
302	}
303
304	if (req)
305	break;
306
307	pthread_cond_wait (&reqwait, &reqlock);
308	}
309
310	pthread_mutex_unlock (&reqlock);
311
312	errno = 0; /* strictly unnecessary */
313
314	type = req->type;
315
316	switch (type)
317	{
318	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
319	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
320	#if SYS_readahead
321	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
322	#else
323	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
324	#endif
325
326	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
327	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
328	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
329
330	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
331	case REQ_CLOSE: req->result = close (req->fd); break;
332	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
333
334	case REQ_FSYNC: req->result = fsync (req->fd); break;
335	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
336
337	case REQ_QUIT:
338	break;
339
340	default:
341	req->result = ENOSYS;
342	break;
343	}
344
345	req->errorno = errno;
346
347	pthread_mutex_lock (&reslock);
348
349	req->next = 0;
350
351	if (rese)
352	{
353	rese->next = req;
354	rese = req;
355	}	440	}
356	else	441	else
357	{	442	{
358	rese = ress = req;	443	sv_result = newSViv (req->result);
359		444	SvREADONLY_on (sv_result);
360	/* write a dummy byte to the pipe so fh becomes ready */
361	write (respipe [1], &respipe, 1);
362	}	445	}
363		446
364	pthread_mutex_unlock (&reslock);	447	switch (req->type)
		448	{
		449	case EIO_READDIR:
		450	{
		451	SV *rv = &PL_sv_undef;
		452
		453	if (req->result >= 0)
		454	{
		455	int i;
		456	char *names = (char *)req->ptr2;
		457	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		458	AV *av = newAV ();
		459
		460	av_extend (av, req->result - 1);
		461
		462	for (i = 0; i < req->result; ++i)
		463	{
		464	if (req->int1 & EIO_READDIR_DENTS)
		465	{
		466	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		467
		468	if (req->int1 & EIO_READDIR_CUSTOM2)
		469	{
		470	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		471	AV *avent = newAV ();
		472
		473	av_extend (avent, 2);
		474
		475	if (!sv_type [ent->type])
		476	{
		477	sv_type [ent->type] = newSViv (ent->type);
		478	SvREADONLY_on (sv_type [ent->type]);
		479	}
		480
		481	av_store (avent, 0, namesv);
		482	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		483	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		484
		485	av_store (av, i, newRV_noinc ((SV *)avent));
		486	}
		487	else
		488	av_store (av, i, namesv);
		489
		490	++ent;
		491	}
		492	else
		493	{
		494	SV *name = newSVpv (names, 0);
		495	av_store (av, i, name);
		496	names += SvCUR (name) + 1;
		497	}
		498	}
		499
		500	rv = sv_2mortal (newRV_noinc ((SV *)av));
		501	}
		502
		503	PUSHs (rv);
		504
		505	if (req->int1 & EIO_READDIR_CUSTOM1)
		506	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		507	}
		508	break;
		509
		510	case EIO_OPEN:
		511	{
		512	/* convert fd to fh */
		513	SV *fh = &PL_sv_undef;
		514
		515	if (req->result >= 0)
		516	{
		517	GV *gv = (GV *)sv_newmortal ();
		518	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		519	char sym [64];
		520	int symlen;
		521
		522	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		523	gv_init (gv, aio_stash, sym, symlen, 0);
		524
		525	symlen = snprintf (
		526	sym,
		527	sizeof (sym),
		528	"%s&=%d",
		529	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		530	(int)req->result
		531	);
		532
		533	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		534	fh = (SV *)gv;
		535	}
		536
		537	PUSHs (fh);
		538	}
		539	break;
		540
		541	case EIO_STATVFS:
		542	case EIO_FSTATVFS:
		543	{
		544	SV *rv = &PL_sv_undef;
		545
		546	#ifndef _WIN32
		547	if (req->result >= 0)
		548	{
		549	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		550	HV *hv = newHV ();
		551
		552	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		553
		554	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		555	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		556	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		557	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		558	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		559	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		560	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		561	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		562	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		563	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		564	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		565	}
		566	#endif
		567
		568	PUSHs (rv);
		569	}
		570
		571	break;
		572
		573	case EIO_GROUP:
		574	req->int1 = 2; /* mark group as finished */
		575
		576	if (req->sv1)
		577	{
		578	int i;
		579	AV *av = (AV *)req->sv1;
		580
		581	EXTEND (SP, AvFILL (av) + 1);
		582	for (i = 0; i <= AvFILL (av); ++i)
		583	PUSHs (*av_fetch (av, i, 0));
		584	}
		585	break;
		586
		587	case EIO_NOP:
		588	case EIO_BUSY:
		589	break;
		590
		591	case EIO_READLINK:
		592	case EIO_REALPATH:
		593	if (req->result > 0)
		594	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		595	break;
		596
		597	case EIO_STAT:
		598	case EIO_LSTAT:
		599	case EIO_FSTAT:
		600	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		601	PL_laststatval = req->result;
		602	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		603	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		604	PUSHs (sv_result);
		605	break;
		606
		607	case EIO_READ:
		608	{
		609	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		610	*SvEND (req->sv2) = 0;
		611	SvPOK_only (req->sv2);
		612	SvSETMAGIC (req->sv2);
		613	PUSHs (sv_result);
		614	}
		615	break;
		616
		617	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		618	if (req->result > 0)
		619	SvIV_set (sv_result, 0);
		620	/* FALLTHROUGH */
		621
		622	default:
		623	PUSHs (sv_result);
		624	break;
		625	}
		626
		627	errno = req->errorno;
		628
		629	PUTBACK;
		630	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		631	SPAGAIN;
		632
		633	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		634	SvREFCNT_dec (sv_result);
		635	else
		636	sv_result_cache = sv_result;
		637
		638	FREETMPS;
		639	LEAVE;
		640
		641	PUTBACK;
365	}	642	}
366	while (type != REQ_QUIT);	643
		644	return !!SvTRUE (ERRSV);
		645	}
		646
		647	static void req_destroy (aio_req req)
		648	{
		649	if (req->self)
		650	{
		651	sv_unmagic (req->self, PERL_MAGIC_ext);
		652	SvREFCNT_dec (req->self);
		653	}
		654
		655	SvREFCNT_dec (req->sv1);
		656	SvREFCNT_dec (req->sv2);
		657	SvREFCNT_dec (req->callback);
		658
		659	Safefree (req);
		660	}
		661
		662	static void req_cancel_subs (aio_req grp)
		663	{
		664	if (grp->type != EIO_GROUP)
		665	return;
		666
		667	SvREFCNT_dec (grp->sv2);
		668	grp->sv2 = 0;
		669
		670	eio_grp_cancel (grp);
		671	}
		672
		673	static void create_respipe (void)
		674	{
		675	if (s_epipe_renew (&respipe))
		676	croak ("IO::AIO: unable to initialize result pipe");
		677	}
		678
		679	static void poll_wait (void)
		680	{
		681	while (eio_nreqs ())
		682	{
		683	int size;
		684
		685	X_LOCK (reslock);
		686	size = res_queue.size;
		687	X_UNLOCK (reslock);
		688
		689	if (size)
		690	return;
		691
		692	etp_maybe_start_thread ();
		693
		694	s_epipe_wait (&respipe);
		695	}
		696	}
		697
		698	static int poll_cb (void)
		699	{
		700	for (;;)
		701	{
		702	int res = eio_poll ();
		703
		704	if (res > 0)
		705	croak (0);
		706
		707	if (!max_outstanding || max_outstanding > eio_nreqs ())
		708	return res;
		709
		710	poll_wait ();
		711	}
		712	}
		713
		714	static void ecb_cold
		715	atfork_child (void)
		716	{
		717	create_respipe ();
		718
		719	if (eio_init (want_poll, done_poll) < 0)
		720	croak ("IO::AIO: unable to initialise eio library");
		721	}
		722
		723	/*****************************************************************************/
		724
		725	#if !_POSIX_MAPPED_FILES
		726	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		727	# define munmap(addr,length) (errno = ENOSYS, -1)
		728	#endif
		729
		730	#if !_POSIX_MEMORY_PROTECTION
		731	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		732	# define PROT_NONE 0
		733	# define PROT_WRITE 0
		734	# define MAP_PRIVATE 0
		735	# define MAP_SHARED 0
		736	# define MAP_FIXED 0
		737	#endif
		738
		739	#define MMAP_MAGIC PERL_MAGIC_ext
		740
		741	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
		742	{
		743	int old_errno = errno;
		744	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		745	errno = old_errno;
		746
		747	mg->mg_obj = 0; /* just in case */
		748
		749	SvREADONLY_off (sv);
		750
		751	if (SvPVX (sv) != mg->mg_ptr)
		752	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		753
		754	SvCUR_set (sv, 0);
		755	SvPVX (sv) = 0;
		756	SvOK_off (sv);
367		757
368	return 0;	758	return 0;
369	}	759	}
370		760
		761	static MGVTBL mmap_vtbl = {
		762	0, 0, 0, 0, mmap_free
		763	};
		764
		765	/*****************************************************************************/
		766
		767	static SV * get_cb (SV *cb_sv)
		768	{
		769	SvGETMAGIC (cb_sv);
		770	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		771	}
		772
		773	#define dREQ \
		774	SV *cb_cv; \
		775	aio_req req; \
		776	int req_pri = next_pri; \
		777	next_pri = EIO_PRI_DEFAULT; \
		778	\
		779	cb_cv = get_cb (callback); \
		780	\
		781	Newz (0, req, 1, eio_req); \
		782	if (!req) \
		783	croak ("out of memory during eio_req allocation"); \
		784	\
		785	req->callback = SvREFCNT_inc (cb_cv); \
		786	req->pri = req_pri
		787
		788	#define REQ_SEND \
		789	PUTBACK; \
		790	req_submit (req); \
		791	SPAGAIN; \
		792	\
		793	if (GIMME_V != G_VOID) \
		794	XPUSHs (req_sv (req, aio_req_stash));
		795
371	MODULE = IO::AIO PACKAGE = IO::AIO	796	MODULE = IO::AIO PACKAGE = IO::AIO
372		797
373	PROTOTYPES: ENABLE	798	PROTOTYPES: ENABLE
374		799
375	BOOT:	800	BOOT:
376	{	801	{
377	if (pipe (respipe))	802	static const struct {
378	croak ("unable to initialize result pipe");	803	const char *name;
		804	IV iv;
		805	} *civ, const_iv[] = {
		806	# define const_niv(name, value) { # name, (IV) value },
		807	# define const_iv(name) { # name, (IV) name },
		808	# define const_eio(name) { # name, (IV) EIO_ ## name },
		809	const_iv (EXDEV)
		810	const_iv (ENOSYS)
		811	const_iv (O_RDONLY)
		812	const_iv (O_WRONLY)
		813	const_iv (O_RDWR)
		814	const_iv (O_CREAT)
		815	const_iv (O_TRUNC)
		816	const_iv (O_EXCL)
		817	const_iv (O_APPEND)
379		818
380	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	819	const_iv (O_ASYNC)
381	croak ("cannot set result pipe to nonblocking mode");	820	const_iv (O_DIRECT)
		821	const_iv (O_NOATIME)
382		822
383	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	823	const_iv (O_CLOEXEC)
384	croak ("cannot set result pipe to nonblocking mode");	824	const_iv (O_NOCTTY)
385	}	825	const_iv (O_NOFOLLOW)
		826	const_iv (O_NONBLOCK)
		827	const_iv (O_EXEC)
		828	const_iv (O_SEARCH)
		829	const_iv (O_DIRECTORY)
		830	const_iv (O_DSYNC)
		831	const_iv (O_RSYNC)
		832	const_iv (O_SYNC)
		833	const_iv (O_TTY_INIT)
386		834
		835	const_iv (S_IFIFO)
		836	const_iv (S_IFCHR)
		837	const_iv (S_IFBLK)
		838	const_iv (S_IFLNK)
		839	const_iv (S_IFREG)
		840	const_iv (S_IFDIR)
		841	const_iv (S_IFWHT)
		842	const_iv (S_IFSOCK)
		843	const_iv (S_IFMT)
		844
		845	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		846	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		847	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		848	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		849	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		850	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		851
		852	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		853	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		854	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		855	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		856	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		857
		858	const_iv (ST_RDONLY)
		859	const_iv (ST_NOSUID)
		860	const_iv (ST_NODEV)
		861	const_iv (ST_NOEXEC)
		862	const_iv (ST_SYNCHRONOUS)
		863	const_iv (ST_MANDLOCK)
		864	const_iv (ST_WRITE)
		865	const_iv (ST_APPEND)
		866	const_iv (ST_IMMUTABLE)
		867	const_iv (ST_NOATIME)
		868	const_iv (ST_NODIRATIME)
		869	const_iv (ST_RELATIME)
		870
		871	const_iv (PROT_NONE)
		872	const_iv (PROT_EXEC)
		873	const_iv (PROT_READ)
		874	const_iv (PROT_WRITE)
		875
		876	/*const_iv (MAP_FIXED)*/
		877	const_iv (MAP_PRIVATE)
		878	const_iv (MAP_SHARED)
		879	const_iv (MAP_ANONYMOUS)
		880
		881	/* linuxish */
		882	const_iv (MAP_HUGETLB)
		883	const_iv (MAP_LOCKED)
		884	const_iv (MAP_NORESERVE)
		885	const_iv (MAP_POPULATE)
		886	const_iv (MAP_NONBLOCK)
		887
		888	const_eio (MCL_FUTURE)
		889	const_eio (MCL_CURRENT)
		890
		891	const_eio (MS_ASYNC)
		892	const_eio (MS_INVALIDATE)
		893	const_eio (MS_SYNC)
		894
		895	const_eio (MT_MODIFY)
		896
		897	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		898	const_eio (SYNC_FILE_RANGE_WRITE)
		899	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		900
		901	const_eio (FALLOC_FL_KEEP_SIZE)
		902
		903	const_eio (READDIR_DENTS)
		904	const_eio (READDIR_DIRS_FIRST)
		905	const_eio (READDIR_STAT_ORDER)
		906	const_eio (READDIR_FOUND_UNKNOWN)
		907
		908	const_eio (DT_UNKNOWN)
		909	const_eio (DT_FIFO)
		910	const_eio (DT_CHR)
		911	const_eio (DT_DIR)
		912	const_eio (DT_BLK)
		913	const_eio (DT_REG)
		914	const_eio (DT_LNK)
		915	const_eio (DT_SOCK)
		916	const_eio (DT_WHT)
		917	};
		918
		919	aio_stash = gv_stashpv ("IO::AIO" , 1);
		920	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		921	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		922
		923	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		924	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		925
		926	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		927
		928	X_THREAD_ATFORK (0, 0, atfork_child);
		929	atfork_child (); /* calls create_respipe and eio_init */
		930	}
		931
387	void	932	void
388	min_parallel(nthreads)	933	max_poll_reqs (unsigned int nreqs)
389	int nthreads
390	PROTOTYPE: $	934	PROTOTYPE: $
391	CODE:	935	CODE:
392	while (nthreads > started)	936	eio_set_max_poll_reqs (nreqs);
393	start_thread ();
394		937
395	void	938	void
396	max_parallel(nthreads)	939	max_poll_time (double nseconds)
397	int nthreads
398	PROTOTYPE: $	940	PROTOTYPE: $
399	CODE:	941	CODE:
		942	eio_set_max_poll_time (nseconds);
		943
		944	void
		945	min_parallel (unsigned int nthreads)
		946	PROTOTYPE: $
		947	CODE:
		948	eio_set_min_parallel (nthreads);
		949
		950	void
		951	max_parallel (unsigned int nthreads)
		952	PROTOTYPE: $
		953	CODE:
		954	eio_set_max_parallel (nthreads);
		955
		956	void
		957	max_idle (unsigned int nthreads)
		958	PROTOTYPE: $
		959	CODE:
		960	eio_set_max_idle (nthreads);
		961
		962	void
		963	idle_timeout (unsigned int seconds)
		964	PROTOTYPE: $
		965	CODE:
		966	eio_set_idle_timeout (seconds);
		967
		968	void
		969	max_outstanding (unsigned int maxreqs)
		970	PROTOTYPE: $
		971	CODE:
		972	max_outstanding = maxreqs;
		973
		974	void
		975	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		976	PPCODE:
400	{	977	{
401	int cur = started;	978	dREQ;
402	while (cur > nthreads)	979
403	{	980	req->type = EIO_OPEN;
404	end_thread ();	981	req->sv1 = newSVsv (pathname);
		982	req->ptr1 = SvPVbyte_nolen (req->sv1);
		983	req->int1 = flags;
		984	req->int2 = mode;
		985
		986	REQ_SEND;
		987	}
		988
		989	void
		990	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		991	ALIAS:
		992	aio_fsync = EIO_FSYNC
		993	aio_fdatasync = EIO_FDATASYNC
		994	PPCODE:
		995	{
		996	int fd = s_fileno_croak (fh, 0);
		997	dREQ;
		998
		999	req->type = ix;
		1000	req->sv1 = newSVsv (fh);
		1001	req->int1 = fd;
		1002
		1003	REQ_SEND (req);
		1004	}
		1005
		1006	void
		1007	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1008	PPCODE:
		1009	{
		1010	int fd = s_fileno_croak (fh, 0);
		1011	dREQ;
		1012
		1013	req->type = EIO_SYNC_FILE_RANGE;
		1014	req->sv1 = newSVsv (fh);
		1015	req->int1 = fd;
		1016	req->offs = offset;
		1017	req->size = nbytes;
		1018	req->int2 = flags;
		1019
		1020	REQ_SEND (req);
		1021	}
		1022
		1023	void
		1024	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1025	PPCODE:
		1026	{
		1027	int fd = s_fileno_croak (fh, 0);
		1028	dREQ;
		1029
		1030	req->type = EIO_FALLOCATE;
		1031	req->sv1 = newSVsv (fh);
		1032	req->int1 = fd;
		1033	req->int2 = mode;
		1034	req->offs = offset;
		1035	req->size = len;
		1036
		1037	REQ_SEND (req);
		1038	}
		1039
		1040	void
		1041	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1042	PPCODE:
		1043	{
		1044	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1045	int fd = s_fileno_croak (fh, 0);
		1046	dREQ;
		1047
		1048	if (expect_false (close_fd < 0))
		1049	{
		1050	int pipefd [2];
		1051
		1052	if (
		1053	#ifdef _WIN32
		1054	_pipe (pipefd, 1, _O_BINARY) < 0
		1055	#else
		1056	pipe (pipefd) < 0
		1057	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1058	#endif
		1059	|| close (pipefd [1]) < 0
405	cur--;	1060	)
		1061	abort (); /*D*/
		1062
		1063	close_fd = pipefd [0];
406	}	1064	}
407		1065
408	while (started > nthreads)	1066	req->type = EIO_DUP2;
		1067	req->int1 = close_fd;
		1068	req->sv2 = newSVsv (fh);
		1069	req->int2 = fd;
		1070
		1071	REQ_SEND (req);
		1072	}
		1073
		1074	void
		1075	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		1076	ALIAS:
		1077	aio_read = EIO_READ
		1078	aio_write = EIO_WRITE
		1079	PPCODE:
		1080	{
		1081	STRLEN svlen;
		1082	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		1083	char *svptr = SvPVbyte (data, svlen);
		1084	UV len = SvUV (length);
		1085
		1086	if (dataoffset < 0)
		1087	dataoffset += svlen;
		1088
		1089	if (dataoffset < 0 || dataoffset > svlen)
		1090	croak ("dataoffset outside of data scalar");
		1091
		1092	if (ix == EIO_WRITE)
		1093	{
		1094	/* write: check length and adjust. */
		1095	if (!SvOK (length) || len + dataoffset > svlen)
		1096	len = svlen - dataoffset;
		1097	}
		1098	else
		1099	{
		1100	/* read: check type and grow scalar as necessary */
		1101	SvUPGRADE (data, SVt_PV);
		1102	svptr = SvGROW (data, len + dataoffset + 1);
		1103	}
		1104
		1105	{
		1106	dREQ;
		1107
		1108	req->type = ix;
		1109	req->sv1 = newSVsv (fh);
		1110	req->int1 = fd;
		1111	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1112	req->size = len;
		1113	req->sv2 = SvREFCNT_inc (data);
		1114	req->ptr2 = (char *)svptr + dataoffset;
		1115	req->stroffset = dataoffset;
		1116
		1117	if (!SvREADONLY (data))
		1118	{
		1119	SvREADONLY_on (data);
		1120	req->flags |= FLAG_SV2_RO_OFF;
		1121	}
		1122
		1123	REQ_SEND;
		1124	}
		1125	}
		1126
		1127	void
		1128	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1129	ALIAS:
		1130	aio_readlink = EIO_READLINK
		1131	aio_realpath = EIO_REALPATH
		1132	PPCODE:
		1133	{
		1134	dREQ;
		1135
		1136	req->type = ix;
		1137	req->sv1 = newSVsv (path);
		1138	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1139
		1140	REQ_SEND;
		1141	}
		1142
		1143	void
		1144	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1145	PPCODE:
		1146	{
		1147	int ifd = s_fileno_croak (in_fh , 0);
		1148	int ofd = s_fileno_croak (out_fh, 1);
		1149	dREQ;
		1150
		1151	req->type = EIO_SENDFILE;
		1152	req->sv1 = newSVsv (out_fh);
		1153	req->int1 = ofd;
		1154	req->sv2 = newSVsv (in_fh);
		1155	req->int2 = ifd;
		1156	req->offs = in_offset;
		1157	req->size = length;
		1158
		1159	REQ_SEND;
		1160	}
		1161
		1162	void
		1163	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1164	PPCODE:
		1165	{
		1166	int fd = s_fileno_croak (fh, 0);
		1167	dREQ;
		1168
		1169	req->type = EIO_READAHEAD;
		1170	req->sv1 = newSVsv (fh);
		1171	req->int1 = fd;
		1172	req->offs = offset;
		1173	req->size = length;
		1174
		1175	REQ_SEND;
		1176	}
		1177
		1178	void
		1179	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1180	ALIAS:
		1181	aio_stat = EIO_STAT
		1182	aio_lstat = EIO_LSTAT
		1183	aio_statvfs = EIO_STATVFS
		1184	PPCODE:
		1185	{
		1186	dREQ;
		1187
		1188	req->sv1 = newSVsv (fh_or_path);
		1189
		1190	if (SvPOK (req->sv1))
		1191	{
		1192	req->type = ix;
		1193	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1194	}
		1195	else
		1196	{
		1197	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		1198	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1199	}
		1200
		1201	REQ_SEND;
		1202	}
		1203
		1204	UV
		1205	major (UV dev)
		1206	ALIAS:
		1207	minor = 1
		1208	CODE:
		1209	RETVAL = ix ? major (dev) : minor (dev);
		1210	OUTPUT:
		1211	RETVAL
		1212
		1213	UV
		1214	makedev (UV maj, UV min)
		1215	CODE:
		1216	RETVAL = makedev (maj, min);
		1217	OUTPUT:
		1218	RETVAL
		1219
		1220	void
		1221	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1222	PPCODE:
		1223	{
		1224	dREQ;
		1225
		1226	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1227	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1228	req->sv1 = newSVsv (fh_or_path);
		1229
		1230	if (SvPOK (req->sv1))
		1231	{
		1232	req->type = EIO_UTIME;
		1233	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1234	}
		1235	else
		1236	{
		1237	req->type = EIO_FUTIME;
		1238	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1239	}
		1240
		1241	REQ_SEND;
		1242	}
		1243
		1244	void
		1245	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1246	PPCODE:
		1247	{
		1248	dREQ;
		1249
		1250	req->sv1 = newSVsv (fh_or_path);
		1251	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1252
		1253	if (SvPOK (req->sv1))
		1254	{
		1255	req->type = EIO_TRUNCATE;
		1256	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1257	}
		1258	else
		1259	{
		1260	req->type = EIO_FTRUNCATE;
		1261	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1262	}
		1263
		1264	REQ_SEND;
		1265	}
		1266
		1267	void
		1268	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1269	ALIAS:
		1270	aio_chmod = EIO_CHMOD
		1271	aio_mkdir = EIO_MKDIR
		1272	PPCODE:
		1273	{
		1274	dREQ;
		1275
		1276	req->int2 = mode;
		1277	req->sv1 = newSVsv (fh_or_path);
		1278
		1279	if (SvPOK (req->sv1))
		1280	{
		1281	req->type = ix;
		1282	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1283	}
		1284	else
		1285	{
		1286	req->type = EIO_FCHMOD;
		1287	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1288	}
		1289
		1290	REQ_SEND;
		1291	}
		1292
		1293	void
		1294	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1295	PPCODE:
		1296	{
		1297	dREQ;
		1298
		1299	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1300	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1301	req->sv1 = newSVsv (fh_or_path);
		1302
		1303	if (SvPOK (req->sv1))
		1304	{
		1305	req->type = EIO_CHOWN;
		1306	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1307	}
		1308	else
		1309	{
		1310	req->type = EIO_FCHOWN;
		1311	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1312	}
		1313
		1314	REQ_SEND;
		1315	}
		1316
		1317	void
		1318	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1319	PPCODE:
		1320	{
		1321	dREQ;
		1322
		1323	req->type = EIO_READDIR;
		1324	req->sv1 = newSVsv (pathname);
		1325	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1326	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1327
		1328	if (flags & EIO_READDIR_DENTS)
		1329	req->int1 |= EIO_READDIR_CUSTOM2;
		1330
		1331	REQ_SEND;
		1332	}
		1333
		1334	void
		1335	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1336	ALIAS:
		1337	aio_unlink = EIO_UNLINK
		1338	aio_rmdir = EIO_RMDIR
		1339	aio_readdir = EIO_READDIR
		1340	PPCODE:
		1341	{
		1342	dREQ;
		1343
		1344	req->type = ix;
		1345	req->sv1 = newSVsv (pathname);
		1346	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1347
		1348	REQ_SEND;
		1349	}
		1350
		1351	void
		1352	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1353	ALIAS:
		1354	aio_link = EIO_LINK
		1355	aio_symlink = EIO_SYMLINK
		1356	aio_rename = EIO_RENAME
		1357	PPCODE:
		1358	{
		1359	dREQ;
		1360
		1361	req->type = ix;
		1362	req->sv1 = newSVsv (oldpath);
		1363	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1364	req->sv2 = newSVsv (newpath);
		1365	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1366
		1367	REQ_SEND;
		1368	}
		1369
		1370	void
		1371	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1372	PPCODE:
		1373	{
		1374	dREQ;
		1375
		1376	req->type = EIO_MKNOD;
		1377	req->sv1 = newSVsv (pathname);
		1378	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1379	req->int2 = (mode_t)mode;
		1380	req->offs = dev;
		1381
		1382	REQ_SEND;
		1383	}
		1384
		1385	void
		1386	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1387	ALIAS:
		1388	aio_mtouch = EIO_MTOUCH
		1389	aio_msync = EIO_MSYNC
		1390	PPCODE:
		1391	{
		1392	STRLEN svlen;
		1393	char *svptr = SvPVbyte (data, svlen);
		1394	UV len = SvUV (length);
		1395
		1396	if (offset < 0)
		1397	offset += svlen;
		1398
		1399	if (offset < 0 || offset > svlen)
		1400	croak ("offset outside of scalar");
		1401
		1402	if (!SvOK (length) || len + offset > svlen)
		1403	len = svlen - offset;
		1404
		1405	{
		1406	dREQ;
		1407
		1408	req->type = ix;
		1409	req->sv2 = SvREFCNT_inc (data);
		1410	req->ptr2 = (char *)svptr + offset;
		1411	req->size = len;
		1412	req->int1 = flags;
		1413
		1414	REQ_SEND;
		1415	}
		1416	}
		1417
		1418	void
		1419	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1420	PPCODE:
		1421	{
		1422	STRLEN svlen;
		1423	char *svptr = SvPVbyte (data, svlen);
		1424	UV len = SvUV (length);
		1425
		1426	if (offset < 0)
		1427	offset += svlen;
		1428
		1429	if (offset < 0 || offset > svlen)
		1430	croak ("offset outside of scalar");
		1431
		1432	if (!SvOK (length) || len + offset > svlen)
		1433	len = svlen - offset;
		1434
		1435	{
		1436	dREQ;
		1437
		1438	req->type = EIO_MLOCK;
		1439	req->sv2 = SvREFCNT_inc (data);
		1440	req->ptr2 = (char *)svptr + offset;
		1441	req->size = len;
		1442
		1443	REQ_SEND;
		1444	}
		1445	}
		1446
		1447	void
		1448	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1449	PPCODE:
		1450	{
		1451	dREQ;
		1452
		1453	req->type = EIO_MLOCKALL;
		1454	req->int1 = flags;
		1455
		1456	REQ_SEND;
		1457	}
		1458
		1459	void
		1460	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1461	PPCODE:
		1462	{
		1463	dREQ;
		1464
		1465	req->type = EIO_BUSY;
		1466	req->nv1 = delay < 0. ? 0. : delay;
		1467
		1468	REQ_SEND;
		1469	}
		1470
		1471	void
		1472	aio_group (SV *callback=&PL_sv_undef)
		1473	PPCODE:
		1474	{
		1475	dREQ;
		1476
		1477	req->type = EIO_GROUP;
		1478
		1479	req_submit (req);
		1480	XPUSHs (req_sv (req, aio_grp_stash));
		1481	}
		1482
		1483	void
		1484	aio_nop (SV *callback=&PL_sv_undef)
		1485	ALIAS:
		1486	aio_nop = EIO_NOP
		1487	aio_sync = EIO_SYNC
		1488	PPCODE:
		1489	{
		1490	dREQ;
		1491
		1492	req->type = ix;
		1493
		1494	REQ_SEND;
		1495	}
		1496
		1497	int
		1498	aioreq_pri (int pri = 0)
		1499	CODE:
		1500	RETVAL = next_pri;
		1501	if (items > 0)
		1502	{
		1503	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1504	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1505	next_pri = pri;
		1506	}
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	void
		1511	aioreq_nice (int nice = 0)
		1512	CODE:
		1513	nice = next_pri - nice;
		1514	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1515	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1516	next_pri = nice;
		1517
		1518	void
		1519	flush ()
		1520	CODE:
		1521	while (eio_nreqs ())
409	{	1522	{
410	poll_wait ();	1523	poll_wait ();
411	poll_cb ();	1524	poll_cb ();
412	}	1525	}
413	}
414		1526
415	int	1527	int
416	max_outstanding(nreqs)	1528	poll ()
417	int nreqs
418	PROTOTYPE: $
419	CODE:
420	RETVAL = max_outstanding;
421	max_outstanding = nreqs;
422
423	void
424	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
425	SV * pathname
426	int flags
427	int mode
428	SV * callback
429	PROTOTYPE: $$$;$
430	CODE:	1529	CODE:
431	{
432	aio_req req;
433
434	Newz (0, req, 1, aio_cb);
435
436	if (!req)
437	croak ("out of memory during aio_req allocation");
438
439	req->type = REQ_OPEN;
440	req->data = newSVsv (pathname);
441	req->dataptr = SvPV_nolen (req->data);
442	req->fd = flags;
443	req->mode = mode;
444	req->callback = SvREFCNT_inc (callback);
445
446	send_req (req);
447	}
448
449	void
450	aio_close(fh,callback=&PL_sv_undef)
451	InputStream fh
452	SV * callback
453	PROTOTYPE: $;$
454	ALIAS:
455	aio_close = REQ_CLOSE
456	aio_fsync = REQ_FSYNC
457	aio_fdatasync = REQ_FDATASYNC
458	CODE:
459	{
460	aio_req req;
461
462	Newz (0, req, 1, aio_cb);
463
464	if (!req)
465	croak ("out of memory during aio_req allocation");
466
467	req->type = ix;
468	req->fd = PerlIO_fileno (fh);
469	req->callback = SvREFCNT_inc (callback);
470
471	send_req (req);
472	}
473
474	void
475	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
476	InputStream fh
477	UV offset
478	IV length
479	SV * data
480	IV dataoffset
481	SV * callback
482	PROTOTYPE: $$$$$;$
483	CODE:
484	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
485
486	void
487	aio_write(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
488	OutputStream fh
489	UV offset
490	IV length
491	SV * data
492	IV dataoffset
493	SV * callback
494	PROTOTYPE: $$$$$;$
495	CODE:
496	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
497
498	void
499	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
500	InputStream fh
501	UV offset
502	IV length
503	SV * callback
504	PROTOTYPE: $$$;$
505	CODE:
506	{
507	aio_req req;
508
509	if (length < 0)
510	croak ("length must not be negative");
511
512	Newz (0, req, 1, aio_cb);
513
514	if (!req)
515	croak ("out of memory during aio_req allocation");
516
517	req->type = REQ_READAHEAD;
518	req->fd = PerlIO_fileno (fh);
519	req->offset = offset;
520	req->length = length;
521	req->callback = SvREFCNT_inc (callback);
522
523	send_req (req);
524	}
525
526	void
527	aio_stat(fh_or_path,callback=&PL_sv_undef)
528	SV * fh_or_path
529	SV * callback
530	ALIAS:
531	aio_stat = REQ_STAT
532	aio_lstat = REQ_LSTAT
533	CODE:
534	{
535	aio_req req;
536
537	Newz (0, req, 1, aio_cb);
538
539	if (!req)
540	croak ("out of memory during aio_req allocation");
541
542	New (0, req->statdata, 1, Stat_t);
543
544	if (!req->statdata)
545	croak ("out of memory during aio_req->statdata allocation");
546
547	if (SvPOK (fh_or_path))
548	{
549	req->type = ix;
550	req->data = newSVsv (fh_or_path);
551	req->dataptr = SvPV_nolen (req->data);
552	}
553	else
554	{
555	req->type = REQ_FSTAT;
556	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
557	}
558
559	req->callback = SvREFCNT_inc (callback);
560
561	send_req (req);
562	}
563
564	void
565	aio_unlink(pathname,callback=&PL_sv_undef)
566	SV * pathname
567	SV * callback
568	CODE:
569	{
570	aio_req req;
571
572	Newz (0, req, 1, aio_cb);
573
574	if (!req)
575	croak ("out of memory during aio_req allocation");
576
577	req->type = REQ_UNLINK;
578	req->data = newSVsv (pathname);
579	req->dataptr = SvPV_nolen (req->data);
580	req->callback = SvREFCNT_inc (callback);
581
582	send_req (req);
583	}
584
585	void
586	flush()
587	PROTOTYPE:
588	CODE:
589	while (nreqs)
590	{
591	poll_wait ();	1530	poll_wait ();
592	poll_cb ();	1531	RETVAL = poll_cb ();
593	}
594
595	void
596	poll()
597	PROTOTYPE:
598	CODE:
599	if (nreqs)
600	{
601	poll_wait ();
602	poll_cb ();
603	}
604
605	int
606	poll_fileno()
607	PROTOTYPE:
608	CODE:
609	RETVAL = respipe [0];
610	OUTPUT:	1532	OUTPUT:
611	RETVAL	1533	RETVAL
612		1534
613	int	1535	int
		1536	poll_fileno ()
		1537	CODE:
		1538	RETVAL = s_epipe_fd (&respipe);
		1539	OUTPUT:
		1540	RETVAL
		1541
		1542	int
614	poll_cb(...)	1543	poll_cb (...)
615	PROTOTYPE:	1544	PROTOTYPE:
616	CODE:	1545	CODE:
617	RETVAL = poll_cb ();	1546	RETVAL = poll_cb ();
618	OUTPUT:	1547	OUTPUT:
619	RETVAL	1548	RETVAL
620		1549
621	void	1550	void
622	poll_wait()	1551	poll_wait ()
623	PROTOTYPE:
624	CODE:	1552	CODE:
625	if (nreqs)
626	poll_wait ();	1553	poll_wait ();
627		1554
628	int	1555	int
629	nreqs()	1556	nreqs ()
630	PROTOTYPE:
631	CODE:	1557	CODE:
632	RETVAL = nreqs;	1558	RETVAL = eio_nreqs ();
633	OUTPUT:	1559	OUTPUT:
634	RETVAL	1560	RETVAL
635		1561
		1562	int
		1563	nready ()
		1564	CODE:
		1565	RETVAL = eio_nready ();
		1566	OUTPUT:
		1567	RETVAL
		1568
		1569	int
		1570	npending ()
		1571	CODE:
		1572	RETVAL = eio_npending ();
		1573	OUTPUT:
		1574	RETVAL
		1575
		1576	int
		1577	nthreads ()
		1578	CODE:
		1579	RETVAL = eio_nthreads ();
		1580	OUTPUT:
		1581	RETVAL
		1582
		1583	int
		1584	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1585	CODE:
		1586	RETVAL = posix_fadvise (fh, offset, length, advice);
		1587	OUTPUT:
		1588	RETVAL
		1589
		1590	ssize_t
		1591	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1592	CODE:
		1593	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1594	OUTPUT:
		1595	RETVAL
		1596
		1597	void
		1598	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1599	PPCODE:
		1600	sv_unmagic (scalar, MMAP_MAGIC);
		1601	{
		1602	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1603	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1604	if (addr == (void *)-1)
		1605	XSRETURN_NO;
		1606
		1607	sv_force_normal (scalar);
		1608
		1609	/* we store the length in mg_obj, as namlen is I32 :/ */
		1610	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1611	->mg_obj = (SV *)length;
		1612
		1613	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1614
		1615	if (!(prot & PROT_WRITE))
		1616	SvREADONLY_on (scalar);
		1617
		1618	if (SvLEN (scalar))
		1619	Safefree (SvPVX (scalar));
		1620
		1621	SvPVX (scalar) = (char *)addr;
		1622	SvCUR_set (scalar, length);
		1623	SvLEN_set (scalar, 0);
		1624	SvPOK_only (scalar);
		1625
		1626	XSRETURN_YES;
		1627	}
		1628
		1629	void
		1630	munmap (SV *scalar)
		1631	CODE:
		1632	sv_unmagic (scalar, MMAP_MAGIC);
		1633
		1634	int
		1635	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1636	ALIAS:
		1637	mprotect = 1
		1638	CODE:
		1639	{
		1640	STRLEN svlen;
		1641	void *addr = SvPVbyte (scalar, svlen);
		1642	size_t len = SvUV (length);
		1643
		1644	if (offset < 0)
		1645	offset += svlen;
		1646
		1647	if (offset < 0 || offset > svlen)
		1648	croak ("offset outside of scalar");
		1649
		1650	if (!SvOK (length) || len + offset > svlen)
		1651	len = svlen - offset;
		1652
		1653	addr = (void *)(((intptr_t)addr) + offset);
		1654	eio_page_align (&addr, &len);
		1655
		1656	switch (ix)
		1657	{
		1658	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1659	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1660	}
		1661	}
		1662	OUTPUT:
		1663	RETVAL
		1664
		1665	int
		1666	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1667	CODE:
		1668	{
		1669	STRLEN svlen;
		1670	void *addr = SvPVbyte (scalar, svlen);
		1671	size_t len = SvUV (length);
		1672
		1673	if (offset < 0)
		1674	offset += svlen;
		1675
		1676	if (offset < 0 || offset > svlen)
		1677	croak ("offset outside of scalar");
		1678
		1679	if (!SvOK (length) || len + offset > svlen)
		1680	len = svlen - offset;
		1681
		1682	addr = (void *)(((intptr_t)addr) + offset);
		1683	eio_page_align (&addr, &len);
		1684	#if _POSIX_MEMLOCK_RANGE
		1685	RETVAL = munlock (addr, len);
		1686	#else
		1687	RETVAL = ((errno = ENOSYS), -1);
		1688	#endif
		1689	}
		1690	OUTPUT:
		1691	RETVAL
		1692
		1693	int
		1694	munlockall ()
		1695	CODE:
		1696	#if _POSIX_MEMLOCK
		1697	munlockall ();
		1698	#else
		1699	RETVAL = -1;
		1700	errno = ENOSYS;
		1701	#endif
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	void _on_next_submit (SV *cb)
		1706	CODE:
		1707	SvREFCNT_dec (on_next_submit);
		1708	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1709
		1710	PROTOTYPES: DISABLE
		1711
		1712	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1713
		1714	void
		1715	cancel (aio_req_ornot req)
		1716	CODE:
		1717	eio_cancel (req);
		1718
		1719	void
		1720	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1721	PPCODE:
		1722	{
		1723	if (GIMME_V != G_VOID)
		1724	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1725
		1726	if (items > 1)
		1727	{
		1728	SV *cb_cv =get_cb (callback);
		1729
		1730	SvREFCNT_dec (req->callback);
		1731	req->callback = SvREFCNT_inc (cb_cv);
		1732	}
		1733	}
		1734
		1735	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1736
		1737	void
		1738	add (aio_req grp, ...)
		1739	PPCODE:
		1740	{
		1741	int i;
		1742
		1743	if (grp->int1 == 2)
		1744	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1745
		1746	for (i = 1; i < items; ++i )
		1747	{
		1748	aio_req req;
		1749
		1750	if (GIMME_V != G_VOID)
		1751	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1752
		1753	req = SvAIO_REQ (ST (i));
		1754
		1755	if (req)
		1756	eio_grp_add (grp, req);
		1757	}
		1758	}
		1759
		1760	void
		1761	cancel_subs (aio_req_ornot req)
		1762	CODE:
		1763	req_cancel_subs (req);
		1764
		1765	void
		1766	result (aio_req grp, ...)
		1767	CODE:
		1768	{
		1769	int i;
		1770	AV *av;
		1771
		1772	grp->errorno = errno;
		1773
		1774	av = newAV ();
		1775	av_extend (av, items - 1);
		1776
		1777	for (i = 1; i < items; ++i )
		1778	av_push (av, newSVsv (ST (i)));
		1779
		1780	SvREFCNT_dec (grp->sv1);
		1781	grp->sv1 = (SV *)av;
		1782	}
		1783
		1784	void
		1785	errno (aio_req grp, int errorno = errno)
		1786	CODE:
		1787	grp->errorno = errorno;
		1788
		1789	void
		1790	limit (aio_req grp, int limit)
		1791	CODE:
		1792	eio_grp_limit (grp, limit);
		1793
		1794	void
		1795	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1796	CODE:
		1797	{
		1798	SvREFCNT_dec (grp->sv2);
		1799	grp->sv2 = newSVsv (callback);
		1800	grp->feed = aio_grp_feed;
		1801
		1802	if (grp->int2 <= 0)
		1803	grp->int2 = 2;
		1804
		1805	eio_grp_limit (grp, grp->int2);
		1806	}
		1807

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