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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.4 by root, Sun Jul 10 20:57:00 2005 UTC vs.
Revision 1.186 by root, Thu Jul 14 22:36:17 2011 UTC

1	#define PERL_NO_GET_CONTEXT	1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
2		4
3	#include "EXTERN.h"	5	#include "EXTERN.h"
4	#include "perl.h"	6	#include "perl.h"
5	#include "XSUB.h"	7	#include "XSUB.h"
6		8
		9	#include "schmorp.h"
		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	#include <unistd.h>	16	#include <limits.h>
10	#include <fcntl.h>	17	#include <fcntl.h>
11	#include <signal.h>
12	#include <sched.h>	18	#include <sched.h>
13	#include <endian.h>
14		19
15	#include <pthread.h>	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
16	#include <sys/syscall.h>	21	# include <sys/mman.h>
		22	#endif
17		23
18	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	24	/* perl namespace pollution */
19	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	#undef VERSION
20	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
21		26
22	#if __ia64	27	#ifdef _WIN32
23	# define STACKSIZE 65536	28
		29	# define EIO_STRUCT_DIRENT Direntry_t
		30	# undef malloc
		31	# undef free
		32
		33	// perl overrides all those nice win32 functions
		34	# undef open
		35	# undef read
		36	# undef write
		37	# undef send
		38	# undef recv
		39	# undef stat
		40	# undef fstat
		41	# define lstat stat
		42	# undef truncate
		43	# undef ftruncate
		44	# undef open
		45	# undef close
		46	# undef unlink
		47	# undef rmdir
		48	# undef rename
		49	# undef lseek
		50
		51	# define opendir(fd) (errno = ENOSYS, 0)
		52	# define readdir(fd) (errno = ENOSYS, -1)
		53	# define closedir(fd) (errno = ENOSYS, -1)
		54
24	#else	55	#else
25	# define STACKSIZE 4096	56
		57	# include <sys/time.h>
		58	# include <sys/select.h>
		59	# include <unistd.h>
		60	# include <utime.h>
		61	# include <signal.h>
		62	# define EIO_STRUCT_DIRENT struct dirent
		63
		64	#endif
		65
		66	/* perl stupidly overrides readdir and maybe others */
		67	/* with thread-unsafe versions, imagine that :( */
		68	#undef readdir
		69	#undef opendir
		70	#undef closedir
		71
		72	#define EIO_STRUCT_STAT Stat_t
		73
		74	/* use NV for 32 bit perls as it allows larger offsets */
		75	#if IVSIZE >= 8
		76	# define VAL64 IV
		77	# define SvVAL64 SvIV
		78	# define newSVval64 newSViv
		79	#else
		80	# define VAL64 NV
		81	# define SvVAL64 SvNV
		82	# define newSVval64 newSVnv
		83	#endif
		84
		85	/*****************************************************************************/
		86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
		89	#else
		90	# define expect(expr,value) (expr)
		91	#endif
		92
		93	#define expect_false(expr) expect ((expr) != 0, 0)
		94	#define expect_true(expr) expect ((expr) != 0, 1)
		95
		96	/*****************************************************************************/
		97
		98	typedef SV SV8; /* byte-sv, used for argument-checking */
		99	typedef int aio_rfd; /* read file desriptor */
		100	typedef int aio_wfd; /* write file descriptor */
		101
		102	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		103
		104	#define EIO_REQ_MEMBERS \
		105	SV *callback; \
		106	SV *sv1, *sv2; \
		107	STRLEN stroffset; \
		108	SV *self;
		109
		110	#define EIO_NO_WRAPPERS 1
		111
		112	#include "libeio/config.h"
		113	#include "libeio/eio.h"
		114
		115	/* Linux/others */
		116	#ifndef O_ASYNC
		117	# define O_ASYNC 0
		118	#endif
		119	#ifndef O_DIRECT
		120	# define O_DIRECT 0
		121	#endif
		122	#ifndef O_NOATIME
		123	# define O_NOATIME 0
		124	#endif
		125
		126	/* POSIX */
		127	#ifndef O_CLOEXEC
		128	# define O_CLOEXEC 0
		129	#endif
		130	#ifndef O_NOFOLLOW
		131	# define O_NOFOLLOW 0
		132	#endif
		133	#ifndef O_NOCTTY
		134	# define O_NOCTTY 0
		135	#endif
		136	#ifndef O_NONBLOCK
		137	# define O_NONBLOCK 0
		138	#endif
		139	#ifndef O_EXEC
		140	# define O_EXEC 0
		141	#endif
		142	#ifndef O_SEARCH
		143	# define O_SEARCH 0
		144	#endif
		145	#ifndef O_DIRECTORY
		146	# define O_DIRECTORY 0
		147	#endif
		148	#ifndef O_DSYNC
		149	# define O_DSYNC 0
		150	#endif
		151	#ifndef O_RSYNC
		152	# define O_RSYNC 0
		153	#endif
		154	#ifndef O_SYNC
		155	# define O_SYNC 0
		156	#endif
		157	#ifndef O_TTY_INIT
		158	# define O_TTY_INIT 0
		159	#endif
		160
		161	#ifndef POSIX_FADV_NORMAL
		162	# define POSIX_FADV_NORMAL 0
		163	#endif
		164	#ifndef POSIX_FADV_SEQUENTIAL
		165	# define POSIX_FADV_SEQUENTIAL 0
		166	#endif
		167	#ifndef POSIX_FADV_RANDOM
		168	# define POSIX_FADV_RANDOM 0
		169	#endif
		170	#ifndef POSIX_FADV_NOREUSE
		171	# define POSIX_FADV_NOREUSE 0
		172	#endif
		173	#ifndef POSIX_FADV_WILLNEED
		174	# define POSIX_FADV_WILLNEED 0
		175	#endif
		176	#ifndef POSIX_FADV_DONTNEED
		177	# define POSIX_FADV_DONTNEED 0
		178	#endif
		179
		180	#if !HAVE_POSIX_FADVISE
		181	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		182	#endif
		183
		184	#ifndef POSIX_MADV_NORMAL
		185	# define POSIX_MADV_NORMAL 0
		186	#endif
		187	#ifndef POSIX_MADV_SEQUENTIAL
		188	# define POSIX_MADV_SEQUENTIAL 0
		189	#endif
		190	#ifndef POSIX_MADV_RANDOM
		191	# define POSIX_MADV_RANDOM 0
		192	#endif
		193	#ifndef POSIX_MADV_WILLNEED
		194	# define POSIX_MADV_WILLNEED 0
		195	#endif
		196	#ifndef POSIX_MADV_DONTNEED
		197	# define POSIX_MADV_DONTNEED 0
		198	#endif
		199
		200	#if !HAVE_POSIX_MADVISE
		201	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		202	#endif
		203
		204	#ifndef PROT_NONE
		205	# define PROT_NONE 0
		206	#endif
		207	#ifndef PROT_READ
		208	# define PROT_READ 0
		209	#endif
		210	#ifndef PROT_WRITE
		211	# define PROT_READ 0
		212	#endif
		213	#ifndef PROT_EXEC
		214	# define PROT_EXEC 0
		215	#endif
		216
		217	#ifndef ST_NODEV
		218	# define ST_NODEV 0
		219	#endif
		220	#ifndef ST_NOEXEC
		221	# define ST_NOEXEC 0
		222	#endif
		223	#ifndef ST_SYNCHRONOUS
		224	# define ST_SYNCHRONOUS 0
		225	#endif
		226	#ifndef ST_MANDLOCK
		227	# define ST_MANDLOCK 0
		228	#endif
		229	#ifndef ST_WRITE
		230	# define ST_WRITE 0
		231	#endif
		232	#ifndef ST_APPEND
		233	# define ST_APPEND 0
		234	#endif
		235	#ifndef ST_IMMUTABLE
		236	# define ST_IMMUTABLE 0
		237	#endif
		238	#ifndef ST_NOATIME
		239	# define ST_NOATIME 0
		240	#endif
		241	#ifndef ST_NODIRATIME
		242	# define ST_NODIRATIME 0
		243	#endif
		244	#ifndef ST_RELATIME
		245	# define ST_RELATIME 0
		246	#endif
		247
		248	#ifndef S_IFIFO
		249	# define S_IFIFO 0
		250	#endif
		251	#ifndef S_IFCHR
		252	# define S_IFCHR 0
		253	#endif
		254	#ifndef S_IFBLK
		255	# define S_IFBLK 0
		256	#endif
		257	#ifndef S_IFLNK
		258	# define S_IFLNK 0
		259	#endif
		260	#ifndef S_IFREG
		261	# define S_IFREG 0
		262	#endif
		263	#ifndef S_IFDIR
		264	# define S_IFDIR 0
		265	#endif
		266	#ifndef S_IFWHT
		267	# define S_IFWHT 0
		268	#endif
		269	#ifndef S_IFSOCK
		270	# define S_IFSOCK 0
		271	#endif
		272
		273	#ifndef MAP_ANONYMOUS
		274	# ifdef MAP_ANON
		275	# define MAP_ANONYMOUS MAP_ANON
		276	# else
		277	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
26	#endif	278	# endif
		279	#endif
		280	#ifndef MAP_HUGETLB
		281	# define MAP_HUGETLB 0
		282	#endif
		283	#ifndef MAP_LOCKED
		284	# define MAP_LOCKED 0
		285	#endif
		286	#ifndef MAP_NORESERVE
		287	# define MAP_NORESERVE 0
		288	#endif
		289	#ifndef MAP_POPULATE
		290	# define MAP_POPULATE 0
		291	#endif
		292	#ifndef MAP_NONBLOCK
		293	# define MAP_NONBLOCK 0
		294	#endif
		295
		296	#ifndef makedev
		297	# define makedev(maj,min) (((maj) << 8) | (min))
		298	#endif
		299	#ifndef major
		300	# define major(dev) ((dev) >> 8)
		301	#endif
		302	#ifndef minor
		303	# define minor(dev) ((dev) & 0xff)
		304	#endif
		305
		306	#ifndef PAGESIZE
		307	# define PAGESIZE sysconf (_SC_PAGESIZE)
		308	#endif
		309
		310	static int req_invoke (eio_req *req);
		311	#define EIO_FINISH(req) req_invoke (req)
		312	static void req_destroy (eio_req *grp);
		313	#define EIO_DESTROY(req) req_destroy (req)
27		314
28	enum {	315	enum {
29	REQ_QUIT,	316	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
30	REQ_OPEN, REQ_CLOSE,
31	REQ_READ, REQ_WRITE, REQ_READAHEAD,
32	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
33	REQ_FSYNC, REQ_FDATASYNC,
34	};	317	};
35		318
36	typedef struct aio_cb {	319	#include "libeio/eio.c"
37	struct aio_cb *volatile next;
38		320
39	int type;
40
41	int fd;
42	off_t offset;
43	size_t length;
44	ssize_t result;
45	mode_t mode; /* open */
46	int errorno;
47	SV *data, *callback;
48	void *dataptr;
49	STRLEN dataoffset;
50
51	Stat_t *statdata;
52	} aio_cb;
53
54	typedef aio_cb *aio_req;	321	typedef eio_req *aio_req;
		322	typedef eio_req *aio_req_ornot;
55		323
56	static int started;	324	static SV *on_next_submit;
57	static int nreqs;	325	static int next_pri = EIO_PRI_DEFAULT;
58	static int max_outstanding = 1<<30;	326	static int max_outstanding;
59	static int respipe [2];
60		327
61	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	328	static s_epipe respipe;
62	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
63	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
64		329
65	static volatile aio_req reqs, reqe; /* queue start, queue end */	330	static void req_destroy (aio_req req);
66	static volatile aio_req ress, rese; /* queue start, queue end */	331	static void req_cancel (aio_req req);
67		332
68	static void	333	static void want_poll (void)
69	poll_wait ()
70	{	334	{
71	if (!nreqs)	335	/* write a dummy byte to the pipe so fh becomes ready */
72	return;	336	s_epipe_signal (&respipe);
73
74	fd_set rfd;
75	FD_ZERO(&rfd);
76	FD_SET(respipe [0], &rfd);
77
78	select (respipe [0] + 1, &rfd, 0, 0, 0);
79	}	337	}
80		338
81	static int	339	static void done_poll (void)
82	poll_cb (pTHX)
83	{	340	{
84	dSP;
85	int count = 0;
86	aio_req req;
87
88	{
89	/* read and signals sent by the worker threads */	341	/* read any signals sent by the worker threads */
90	char buf [32];	342	s_epipe_drain (&respipe);
91	while (read (respipe [0], buf, 32) > 0)	343	}
92	;
93	}
94		344
95	for (;;)	345	/* must be called at most once */
		346	static SV *req_sv (aio_req req, HV *stash)
		347	{
		348	if (!req->self)
96	{	349	{
97	pthread_mutex_lock (&reslock);	350	req->self = (SV *)newHV ();
		351	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		352	}
98		353
99	req = ress;	354	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		355	}
100		356
101	if (ress)	357	static aio_req SvAIO_REQ (SV *sv)
		358	{
		359	MAGIC *mg;
		360
		361	if (!SvROK (sv)
		362	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		363	&& SvSTASH (SvRV (sv)) != aio_req_stash
		364	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		365	croak ("object of class IO::AIO::REQ expected");
		366
		367	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		368
		369	return mg ? (aio_req)mg->mg_ptr : 0;
		370	}
		371
		372	static void aio_grp_feed (aio_req grp)
		373	{
		374	if (grp->sv2 && SvOK (grp->sv2))
		375	{
		376	dSP;
		377
		378	ENTER;
		379	SAVETMPS;
		380	PUSHMARK (SP);
		381	XPUSHs (req_sv (grp, aio_grp_stash));
		382	PUTBACK;
		383	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		384	SPAGAIN;
		385	FREETMPS;
		386	LEAVE;
		387	}
		388	}
		389
		390	static void req_submit (eio_req *req)
		391	{
		392	eio_submit (req);
		393
		394	if (expect_false (on_next_submit))
		395	{
		396	dSP;
		397	SV *cb = sv_2mortal (on_next_submit);
		398
		399	on_next_submit = 0;
		400
		401	PUSHMARK (SP);
		402	PUTBACK;
		403	call_sv (cb, G_DISCARD | G_EVAL);
		404	}
		405	}
		406
		407	static int req_invoke (eio_req *req)
		408	{
		409	if (req->flags & FLAG_SV2_RO_OFF)
		410	SvREADONLY_off (req->sv2);
		411
		412	if (!EIO_CANCELLED (req) && req->callback)
		413	{
		414	dSP;
		415	static SV *sv_result_cache; /* caches the result integer SV */
		416	SV *sv_result;
		417
		418	ENTER;
		419	SAVETMPS;
		420	PUSHMARK (SP);
		421	EXTEND (SP, 1);
		422
		423	/* do not recreate the result IV from scratch each time */
		424	if (expect_true (sv_result_cache))
102	{	425	{
103	ress = ress->next;	426	sv_result = sv_result_cache; sv_result_cache = 0;
104	if (!ress) rese = 0;	427	SvIV_set (sv_result, req->result);
105	}	428	SvIOK_only (sv_result);
106
107	pthread_mutex_unlock (&reslock);
108
109	if (!req)
110	break;
111
112	nreqs--;
113
114	if (req->type == REQ_QUIT)
115	started--;
116	else
117	{
118	int errorno = errno;
119	errno = req->errorno;
120
121	if (req->type == REQ_READ)
122	SvCUR_set (req->data, req->dataoffset
123	+ req->result > 0 ? req->result : 0);
124
125	if (req->data)
126	SvREFCNT_dec (req->data);
127
128	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
129	{
130	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
131	PL_laststatval = req->result;
132	PL_statcache = *(req->statdata);
133
134	Safefree (req->statdata);
135	}
136
137	PUSHMARK (SP);
138	XPUSHs (sv_2mortal (newSViv (req->result)));
139
140	if (req->type == REQ_OPEN)
141	{
142	/* convert fd to fh */
143	SV *fh;
144
145	PUTBACK;
146	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
147	SPAGAIN;
148
149	fh = POPs;
150
151	PUSHMARK (SP);
152	XPUSHs (fh);
153	}
154
155	PUTBACK;
156	call_sv (req->callback, G_VOID | G_EVAL);
157	SPAGAIN;
158
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161
162	errno = errorno;
163	count++;
164	}
165
166	Safefree (req);
167	}
168
169	return count;
170	}
171
172	static void *aio_proc(void *arg);
173
174	static void
175	start_thread (void)
176	{
177	sigset_t fullsigset, oldsigset;
178	pthread_t tid;
179	pthread_attr_t attr;
180
181	pthread_attr_init (&attr);
182	pthread_attr_setstacksize (&attr, STACKSIZE);
183	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
184
185	sigfillset (&fullsigset);
186	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
187
188	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
189	started++;
190
191	sigprocmask (SIG_SETMASK, &oldsigset, 0);
192	}
193
194	static void
195	send_req (aio_req req)
196	{
197	nreqs++;
198
199	pthread_mutex_lock (&reqlock);
200
201	req->next = 0;
202
203	if (reqe)
204	{
205	reqe->next = req;
206	reqe = req;
207	}
208	else
209	reqe = reqs = req;
210
211	pthread_cond_signal (&reqwait);
212	pthread_mutex_unlock (&reqlock);
213
214	while (nreqs > max_outstanding)
215	{
216	poll_wait ();
217	poll_cb ();
218	}
219	}
220
221	static void
222	end_thread (void)
223	{
224	aio_req req;
225	New (0, req, 1, aio_cb);
226	req->type = REQ_QUIT;
227
228	send_req (req);
229	}
230
231	static void
232	read_write (pTHX_
233	int dowrite, int fd, off_t offset, size_t length,
234	SV *data, STRLEN dataoffset, SV *callback)
235	{
236	aio_req req;
237	STRLEN svlen;
238	char *svptr = SvPV (data, svlen);
239
240	SvUPGRADE (data, SVt_PV);
241	SvPOK_on (data);
242
243	if (dataoffset < 0)
244	dataoffset += svlen;
245
246	if (dataoffset < 0 || dataoffset > svlen)
247	croak ("data offset outside of string");
248
249	if (dowrite)
250	{
251	/* write: check length and adjust. */
252	if (length < 0 || length + dataoffset > svlen)
253	length = svlen - dataoffset;
254	}
255	else
256	{
257	/* read: grow scalar as necessary */
258	svptr = SvGROW (data, length + dataoffset);
259	}
260
261	if (length < 0)
262	croak ("length must not be negative");
263
264	Newz (0, req, 1, aio_cb);
265
266	if (!req)
267	croak ("out of memory during aio_req allocation");
268
269	req->type = dowrite ? REQ_WRITE : REQ_READ;
270	req->fd = fd;
271	req->offset = offset;
272	req->length = length;
273	req->data = SvREFCNT_inc (data);
274	req->dataptr = (char *)svptr + dataoffset;
275	req->callback = SvREFCNT_inc (callback);
276
277	send_req (req);
278	}
279
280	static void *
281	aio_proc (void *thr_arg)
282	{
283	aio_req req;
284	int type;
285
286	do
287	{
288	pthread_mutex_lock (&reqlock);
289
290	for (;;)
291	{
292	req = reqs;
293
294	if (reqs)
295	{
296	reqs = reqs->next;
297	if (!reqs) reqe = 0;
298	}
299
300	if (req)
301	break;
302
303	pthread_cond_wait (&reqwait, &reqlock);
304	}
305
306	pthread_mutex_unlock (&reqlock);
307
308	errno = 0; /* strictly unnecessary */
309
310	type = req->type;
311
312	switch (type)
313	{
314	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
315	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
316	#if SYS_readahead
317	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
318	#else
319	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
320	#endif
321
322	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
323	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
324	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
325
326	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
327	case REQ_CLOSE: req->result = close (req->fd); break;
328	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
329
330	case REQ_FSYNC: req->result = fsync (req->fd); break;
331	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
332
333	case REQ_QUIT:
334	break;
335
336	default:
337	req->result = ENOSYS;
338	break;
339	}
340
341	req->errorno = errno;
342
343	pthread_mutex_lock (&reslock);
344
345	req->next = 0;
346
347	if (rese)
348	{
349	rese->next = req;
350	rese = req;
351	}	429	}
352	else	430	else
353	{	431	{
354	rese = ress = req;	432	sv_result = newSViv (req->result);
355		433	SvREADONLY_on (sv_result);
356	/* write a dummy byte to the pipe so fh becomes ready */
357	write (respipe [1], &respipe, 1);
358	}	434	}
359		435
360	pthread_mutex_unlock (&reslock);	436	switch (req->type)
		437	{
		438	case EIO_READDIR:
		439	{
		440	SV *rv = &PL_sv_undef;
		441
		442	if (req->result >= 0)
		443	{
		444	int i;
		445	char *names = (char *)req->ptr2;
		446	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		447	AV *av = newAV ();
		448
		449	av_extend (av, req->result - 1);
		450
		451	for (i = 0; i < req->result; ++i)
		452	{
		453	if (req->int1 & EIO_READDIR_DENTS)
		454	{
		455	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		456
		457	if (req->int1 & EIO_READDIR_CUSTOM2)
		458	{
		459	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		460	AV *avent = newAV ();
		461
		462	av_extend (avent, 2);
		463
		464	if (!sv_type [ent->type])
		465	{
		466	sv_type [ent->type] = newSViv (ent->type);
		467	SvREADONLY_on (sv_type [ent->type]);
		468	}
		469
		470	av_store (avent, 0, namesv);
		471	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		472	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		473
		474	av_store (av, i, newRV_noinc ((SV *)avent));
		475	}
		476	else
		477	av_store (av, i, namesv);
		478
		479	++ent;
		480	}
		481	else
		482	{
		483	SV *name = newSVpv (names, 0);
		484	av_store (av, i, name);
		485	names += SvCUR (name) + 1;
		486	}
		487	}
		488
		489	rv = sv_2mortal (newRV_noinc ((SV *)av));
		490	}
		491
		492	PUSHs (rv);
		493
		494	if (req->int1 & EIO_READDIR_CUSTOM1)
		495	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		496	}
		497	break;
		498
		499	case EIO_OPEN:
		500	{
		501	/* convert fd to fh */
		502	SV *fh = &PL_sv_undef;
		503
		504	if (req->result >= 0)
		505	{
		506	GV *gv = (GV *)sv_newmortal ();
		507	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		508	char sym [64];
		509	int symlen;
		510
		511	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		512	gv_init (gv, aio_stash, sym, symlen, 0);
		513
		514	symlen = snprintf (
		515	sym,
		516	sizeof (sym),
		517	"%s&=%d",
		518	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		519	(int)req->result
		520	);
		521
		522	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		523	fh = (SV *)gv;
		524	}
		525
		526	PUSHs (fh);
		527	}
		528	break;
		529
		530	case EIO_STATVFS:
		531	case EIO_FSTATVFS:
		532	{
		533	SV *rv = &PL_sv_undef;
		534
		535	if (req->result >= 0)
		536	{
		537	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		538	HV *hv = newHV ();
		539
		540	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		541
		542	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		543	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		544	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		545	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		546	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		547	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		548	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		549	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		550	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		551	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		552	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		553	}
		554
		555	PUSHs (rv);
		556	}
		557
		558	break;
		559
		560	case EIO_GROUP:
		561	req->int1 = 2; /* mark group as finished */
		562
		563	if (req->sv1)
		564	{
		565	int i;
		566	AV *av = (AV *)req->sv1;
		567
		568	EXTEND (SP, AvFILL (av) + 1);
		569	for (i = 0; i <= AvFILL (av); ++i)
		570	PUSHs (*av_fetch (av, i, 0));
		571	}
		572	break;
		573
		574	case EIO_NOP:
		575	case EIO_BUSY:
		576	break;
		577
		578	case EIO_READLINK:
		579	case EIO_REALPATH:
		580	if (req->result > 0)
		581	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		582	break;
		583
		584	case EIO_STAT:
		585	case EIO_LSTAT:
		586	case EIO_FSTAT:
		587	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		588	PL_laststatval = req->result;
		589	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		590	PUSHs (sv_result);
		591	break;
		592
		593	case EIO_READ:
		594	{
		595	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		596	*SvEND (req->sv2) = 0;
		597	SvPOK_only (req->sv2);
		598	SvSETMAGIC (req->sv2);
		599	PUSHs (sv_result);
		600	}
		601	break;
		602
		603	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		604	if (req->result > 0)
		605	SvIV_set (sv_result, 0);
		606	/* FALLTHROUGH */
		607
		608	default:
		609	PUSHs (sv_result);
		610	break;
		611	}
		612
		613	errno = req->errorno;
		614
		615	PUTBACK;
		616	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		617	SPAGAIN;
		618
		619	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		620	SvREFCNT_dec (sv_result);
		621	else
		622	sv_result_cache = sv_result;
		623
		624	FREETMPS;
		625	LEAVE;
		626
		627	PUTBACK;
361	}	628	}
362	while (type != REQ_QUIT);	629
		630	return !!SvTRUE (ERRSV);
		631	}
		632
		633	static void req_destroy (aio_req req)
		634	{
		635	if (req->self)
		636	{
		637	sv_unmagic (req->self, PERL_MAGIC_ext);
		638	SvREFCNT_dec (req->self);
		639	}
		640
		641	SvREFCNT_dec (req->sv1);
		642	SvREFCNT_dec (req->sv2);
		643	SvREFCNT_dec (req->callback);
		644
		645	Safefree (req);
		646	}
		647
		648	static void req_cancel_subs (aio_req grp)
		649	{
		650	aio_req sub;
		651
		652	if (grp->type != EIO_GROUP)
		653	return;
		654
		655	SvREFCNT_dec (grp->sv2);
		656	grp->sv2 = 0;
		657
		658	eio_grp_cancel (grp);
		659	}
		660
		661	static void create_respipe (void)
		662	{
		663	if (s_epipe_renew (&respipe))
		664	croak ("IO::AIO: unable to initialize result pipe");
		665	}
		666
		667	static void poll_wait (void)
		668	{
		669	while (eio_nreqs ())
		670	{
		671	int size;
		672
		673	X_LOCK (reslock);
		674	size = res_queue.size;
		675	X_UNLOCK (reslock);
		676
		677	if (size)
		678	return;
		679
		680	etp_maybe_start_thread ();
		681
		682	s_epipe_wait (&respipe);
		683	}
		684	}
		685
		686	static int poll_cb (void)
		687	{
		688	for (;;)
		689	{
		690	int res = eio_poll ();
		691
		692	if (res > 0)
		693	croak (0);
		694
		695	if (!max_outstanding || max_outstanding > eio_nreqs ())
		696	return res;
		697
		698	poll_wait ();
		699	}
		700	}
		701
		702	static void atfork_child (void)
		703	{
		704	create_respipe ();
		705	}
		706
		707	/*****************************************************************************/
		708
		709	#if !_POSIX_MAPPED_FILES
		710	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		711	# define munmap(addr,length) (errno = ENOSYS, -1)
		712	#endif
		713
		714	#if !_POSIX_MEMORY_PROTECTION
		715	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		716	# define PROT_NONE 0
		717	# define PROT_WRITE 0
		718	# define MAP_PRIVATE 0
		719	# define MAP_SHARED 0
		720	# define MAP_FIXED 0
		721	#endif
		722
		723	#define MMAP_MAGIC PERL_MAGIC_ext
		724
		725	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
		726	{
		727	int old_errno = errno;
		728	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		729	errno = old_errno;
		730
		731	mg->mg_obj = 0; /* just in case */
		732
		733	SvREADONLY_off (sv);
		734
		735	if (SvPVX (sv) != mg->mg_ptr)
		736	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		737
		738	SvCUR_set (sv, 0);
		739	SvPVX (sv) = 0;
		740	SvOK_off (sv);
363		741
364	return 0;	742	return 0;
365	}	743	}
366		744
		745	static MGVTBL mmap_vtbl = {
		746	0, 0, 0, 0, mmap_free
		747	};
		748
		749	/*****************************************************************************/
		750
		751	static SV * get_cb (SV *cb_sv)
		752	{
		753	SvGETMAGIC (cb_sv);
		754	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		755	}
		756
		757	#define dREQ \
		758	SV *cb_cv; \
		759	aio_req req; \
		760	int req_pri = next_pri; \
		761	next_pri = EIO_PRI_DEFAULT; \
		762	\
		763	cb_cv = get_cb (callback); \
		764	\
		765	Newz (0, req, 1, eio_req); \
		766	if (!req) \
		767	croak ("out of memory during eio_req allocation"); \
		768	\
		769	req->callback = SvREFCNT_inc (cb_cv); \
		770	req->pri = req_pri
		771
		772	#define REQ_SEND \
		773	PUTBACK; \
		774	req_submit (req); \
		775	SPAGAIN; \
		776	\
		777	if (GIMME_V != G_VOID) \
		778	XPUSHs (req_sv (req, aio_req_stash));
		779
367	MODULE = IO::AIO PACKAGE = IO::AIO	780	MODULE = IO::AIO PACKAGE = IO::AIO
368		781
		782	PROTOTYPES: ENABLE
		783
369	BOOT:	784	BOOT:
370	{	785	{
371	if (pipe (respipe))	786	static const struct {
372	croak ("unable to initialize result pipe");	787	const char *name;
		788	IV iv;
		789	} *civ, const_iv[] = {
		790	# define const_niv(name, value) { # name, (IV) value },
		791	# define const_iv(name) { # name, (IV) name },
		792	# define const_eio(name) { # name, (IV) EIO_ ## name },
		793	const_iv (EXDEV)
		794	const_iv (ENOSYS)
		795	const_iv (O_RDONLY)
		796	const_iv (O_WRONLY)
		797	const_iv (O_RDWR)
		798	const_iv (O_CREAT)
		799	const_iv (O_TRUNC)
		800	const_iv (O_EXCL)
		801	const_iv (O_APPEND)
373		802
374	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	803	const_iv (O_ASYNC)
375	croak ("cannot set result pipe to nonblocking mode");	804	const_iv (O_DIRECT)
		805	const_iv (O_NOATIME)
376		806
377	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	807	const_iv (O_CLOEXEC)
378	croak ("cannot set result pipe to nonblocking mode");	808	const_iv (O_NOCTTY)
379	}	809	const_iv (O_NOFOLLOW)
		810	const_iv (O_NONBLOCK)
		811	const_iv (O_EXEC)
		812	const_iv (O_SEARCH)
		813	const_iv (O_DIRECTORY)
		814	const_iv (O_DSYNC)
		815	const_iv (O_RSYNC)
		816	const_iv (O_SYNC)
		817	const_iv (O_TTY_INIT)
380		818
		819	const_iv (S_IFIFO)
		820	const_iv (S_IFCHR)
		821	const_iv (S_IFBLK)
		822	const_iv (S_IFLNK)
		823	const_iv (S_IFREG)
		824	const_iv (S_IFDIR)
		825	const_iv (S_IFWHT)
		826	const_iv (S_IFSOCK)
		827	const_iv (S_IFMT)
		828
		829	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		830	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		831	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		832	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		833	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		834	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		835
		836	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		837	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		838	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		839	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		840	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		841
		842	const_iv (ST_RDONLY)
		843	const_iv (ST_NOSUID)
		844	const_iv (ST_NODEV)
		845	const_iv (ST_NOEXEC)
		846	const_iv (ST_SYNCHRONOUS)
		847	const_iv (ST_MANDLOCK)
		848	const_iv (ST_WRITE)
		849	const_iv (ST_APPEND)
		850	const_iv (ST_IMMUTABLE)
		851	const_iv (ST_NOATIME)
		852	const_iv (ST_NODIRATIME)
		853	const_iv (ST_RELATIME)
		854
		855	const_iv (PROT_NONE)
		856	const_iv (PROT_EXEC)
		857	const_iv (PROT_READ)
		858	const_iv (PROT_WRITE)
		859
		860	/*const_iv (MAP_FIXED)*/
		861	const_iv (MAP_PRIVATE)
		862	const_iv (MAP_SHARED)
		863	const_iv (MAP_ANONYMOUS)
		864
		865	/* linuxish */
		866	const_iv (MAP_HUGETLB)
		867	const_iv (MAP_LOCKED)
		868	const_iv (MAP_NORESERVE)
		869	const_iv (MAP_POPULATE)
		870	const_iv (MAP_NONBLOCK)
		871
		872	const_eio (MCL_FUTURE)
		873	const_eio (MCL_CURRENT)
		874
		875	const_eio (MS_ASYNC)
		876	const_eio (MS_INVALIDATE)
		877	const_eio (MS_SYNC)
		878
		879	const_eio (MT_MODIFY)
		880
		881	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		882	const_eio (SYNC_FILE_RANGE_WRITE)
		883	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		884
		885	const_eio (FALLOC_FL_KEEP_SIZE)
		886
		887	const_eio (READDIR_DENTS)
		888	const_eio (READDIR_DIRS_FIRST)
		889	const_eio (READDIR_STAT_ORDER)
		890	const_eio (READDIR_FOUND_UNKNOWN)
		891
		892	const_eio (DT_UNKNOWN)
		893	const_eio (DT_FIFO)
		894	const_eio (DT_CHR)
		895	const_eio (DT_DIR)
		896	const_eio (DT_BLK)
		897	const_eio (DT_REG)
		898	const_eio (DT_LNK)
		899	const_eio (DT_SOCK)
		900	const_eio (DT_WHT)
		901	};
		902
		903	aio_stash = gv_stashpv ("IO::AIO" , 1);
		904	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		905	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		906
		907	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		908	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		909
		910	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		911
		912	create_respipe ();
		913
		914	if (eio_init (want_poll, done_poll) < 0)
		915	croak ("IO::AIO: unable to initialise eio library");
		916
		917	/* atfork child called in fifo order, so before eio's handler */
		918	X_THREAD_ATFORK (0, 0, atfork_child);
		919	}
		920
381	void	921	void
382	min_parallel(nthreads)	922	max_poll_reqs (unsigned int nreqs)
383	int nthreads
384	PROTOTYPE: $	923	PROTOTYPE: $
385	CODE:	924	CODE:
386	while (nthreads > started)	925	eio_set_max_poll_reqs (nreqs);
387	start_thread ();
388		926
389	void	927	void
390	max_parallel(nthreads)	928	max_poll_time (double nseconds)
391	int nthreads
392	PROTOTYPE: $	929	PROTOTYPE: $
393	CODE:	930	CODE:
		931	eio_set_max_poll_time (nseconds);
		932
		933	void
		934	min_parallel (unsigned int nthreads)
		935	PROTOTYPE: $
		936	CODE:
		937	eio_set_min_parallel (nthreads);
		938
		939	void
		940	max_parallel (unsigned int nthreads)
		941	PROTOTYPE: $
		942	CODE:
		943	eio_set_max_parallel (nthreads);
		944
		945	void
		946	max_idle (unsigned int nthreads)
		947	PROTOTYPE: $
		948	CODE:
		949	eio_set_max_idle (nthreads);
		950
		951	void
		952	idle_timeout (unsigned int seconds)
		953	PROTOTYPE: $
		954	CODE:
		955	eio_set_idle_timeout (seconds);
		956
		957	void
		958	max_outstanding (unsigned int maxreqs)
		959	PROTOTYPE: $
		960	CODE:
		961	max_outstanding = maxreqs;
		962
		963	void
		964	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		965	PPCODE:
394	{	966	{
395	int cur = started;	967	dREQ;
396	while (cur > nthreads)	968
397	{	969	req->type = EIO_OPEN;
398	end_thread ();	970	req->sv1 = newSVsv (pathname);
399	cur--;	971	req->ptr1 = SvPVbyte_nolen (req->sv1);
		972	req->int1 = flags;
		973	req->int2 = mode;
		974
		975	REQ_SEND;
		976	}
		977
		978	void
		979	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		980	ALIAS:
		981	aio_fsync = EIO_FSYNC
		982	aio_fdatasync = EIO_FDATASYNC
		983	PPCODE:
		984	{
		985	int fd = s_fileno_croak (fh, 0);
		986	dREQ;
		987
		988	req->type = ix;
		989	req->sv1 = newSVsv (fh);
		990	req->int1 = fd;
		991
		992	REQ_SEND (req);
		993	}
		994
		995	void
		996	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		997	PPCODE:
		998	{
		999	int fd = s_fileno_croak (fh, 0);
		1000	dREQ;
		1001
		1002	req->type = EIO_SYNC_FILE_RANGE;
		1003	req->sv1 = newSVsv (fh);
		1004	req->int1 = fd;
		1005	req->offs = offset;
		1006	req->size = nbytes;
		1007	req->int2 = flags;
		1008
		1009	REQ_SEND (req);
		1010	}
		1011
		1012	void
		1013	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1014	PPCODE:
		1015	{
		1016	int fd = s_fileno_croak (fh, 0);
		1017	dREQ;
		1018
		1019	req->type = EIO_FALLOCATE;
		1020	req->sv1 = newSVsv (fh);
		1021	req->int1 = fd;
		1022	req->int2 = mode;
		1023	req->offs = offset;
		1024	req->size = len;
		1025
		1026	REQ_SEND (req);
		1027	}
		1028
		1029	void
		1030	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1031	PPCODE:
		1032	{
		1033	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		1034	int fd = s_fileno_croak (fh, 0);
		1035	dREQ;
		1036
		1037	if (close_pipe < 0)
		1038	{
		1039	int pipefd [2];
		1040
		1041	if (pipe (pipefd) < 0
		1042	|| close (pipefd [1]) < 0
		1043	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		1044	abort (); /*D*/
		1045
		1046	close_pipe = pipefd [0];
400	}	1047	}
401		1048
402	while (started > nthreads)	1049	req->type = EIO_DUP2;
		1050	req->int1 = close_pipe;
		1051	req->sv2 = newSVsv (fh);
		1052	req->int2 = fd;
		1053
		1054	REQ_SEND (req);
		1055	}
		1056
		1057	void
		1058	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		1059	ALIAS:
		1060	aio_read = EIO_READ
		1061	aio_write = EIO_WRITE
		1062	PPCODE:
		1063	{
		1064	STRLEN svlen;
		1065	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		1066	char *svptr = SvPVbyte (data, svlen);
		1067	UV len = SvUV (length);
		1068
		1069	if (dataoffset < 0)
		1070	dataoffset += svlen;
		1071
		1072	if (dataoffset < 0 || dataoffset > svlen)
		1073	croak ("dataoffset outside of data scalar");
		1074
		1075	if (ix == EIO_WRITE)
403	{	1076	{
404	poll_wait ();	1077	/* write: check length and adjust. */
405	poll_cb (aTHX);	1078	if (!SvOK (length) || len + dataoffset > svlen)
406	}	1079	len = svlen - dataoffset;
407	}
408
409	int
410	max_outstanding(nreqs)
411	int nreqs
412	PROTOTYPE: $
413	CODE:
414	RETVAL = max_outstanding;
415	max_outstanding = nreqs;
416
417	void
418	aio_open(pathname,flags,mode,callback)
419	SV * pathname
420	int flags
421	int mode
422	SV * callback
423	PROTOTYPE: $$$$
424	CODE:
425	{
426	aio_req req;
427
428	Newz (0, req, 1, aio_cb);
429
430	if (!req)
431	croak ("out of memory during aio_req allocation");
432
433	req->type = REQ_OPEN;
434	req->data = newSVsv (pathname);
435	req->dataptr = SvPV_nolen (req->data);
436	req->fd = flags;
437	req->mode = mode;
438	req->callback = SvREFCNT_inc (callback);
439
440	send_req (req);
441	}
442
443	void
444	aio_close(fh,callback)
445	InputStream fh
446	SV * callback
447	PROTOTYPE: $$
448	ALIAS:
449	aio_close = REQ_CLOSE
450	aio_fsync = REQ_FSYNC
451	aio_fdatasync = REQ_FDATASYNC
452	CODE:
453	{
454	aio_req req;
455
456	Newz (0, req, 1, aio_cb);
457
458	if (!req)
459	croak ("out of memory during aio_req allocation");
460
461	req->type = ix;
462	req->fd = PerlIO_fileno (fh);
463	req->callback = SvREFCNT_inc (callback);
464
465	send_req (req);
466	}
467
468	void
469	aio_read(fh,offset,length,data,dataoffset,callback)
470	InputStream fh
471	UV offset
472	IV length
473	SV * data
474	IV dataoffset
475	SV * callback
476	PROTOTYPE: $$$$$$
477	CODE:
478	read_write (aTHX_ 0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
479
480	void
481	aio_write(fh,offset,length,data,dataoffset,callback)
482	OutputStream fh
483	UV offset
484	IV length
485	SV * data
486	IV dataoffset
487	SV * callback
488	PROTOTYPE: $$$$$$
489	CODE:
490	read_write (aTHX_ 1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
491
492	void
493	aio_readahead(fh,offset,length,callback)
494	InputStream fh
495	UV offset
496	IV length
497	SV * callback
498	PROTOTYPE: $$$$
499	CODE:
500	{
501	aio_req req;
502
503	if (length < 0)
504	croak ("length must not be negative");
505
506	Newz (0, req, 1, aio_cb);
507
508	if (!req)
509	croak ("out of memory during aio_req allocation");
510
511	req->type = REQ_READAHEAD;
512	req->fd = PerlIO_fileno (fh);
513	req->offset = offset;
514	req->length = length;
515	req->callback = SvREFCNT_inc (callback);
516
517	send_req (req);
518	}
519
520	void
521	aio_stat(fh_or_path,callback)
522	SV * fh_or_path
523	SV * callback
524	PROTOTYPE: $$
525	ALIAS:
526	aio_lstat = 1
527	CODE:
528	{
529	aio_req req;
530
531	Newz (0, req, 1, aio_cb);
532
533	if (!req)
534	croak ("out of memory during aio_req allocation");
535
536	New (0, req->statdata, 1, Stat_t);
537
538	if (!req->statdata)
539	croak ("out of memory during aio_req->statdata allocation");
540
541	if (SvPOK (fh_or_path))
542	{
543	req->type = ix ? REQ_LSTAT : REQ_STAT;
544	req->data = newSVsv (fh_or_path);
545	req->dataptr = SvPV_nolen (req->data);
546	}	1080	}
547	else	1081	else
548	{	1082	{
549	req->type = REQ_FSTAT;	1083	/* read: check type and grow scalar as necessary */
550	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1084	SvUPGRADE (data, SVt_PV);
		1085	svptr = SvGROW (data, len + dataoffset + 1);
551	}	1086	}
552		1087
		1088	{
		1089	dREQ;
		1090
		1091	req->type = ix;
		1092	req->sv1 = newSVsv (fh);
		1093	req->int1 = fd;
		1094	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1095	req->size = len;
553	req->callback = SvREFCNT_inc (callback);	1096	req->sv2 = SvREFCNT_inc (data);
		1097	req->ptr2 = (char *)svptr + dataoffset;
		1098	req->stroffset = dataoffset;
554		1099
555	send_req (req);	1100	if (!SvREADONLY (data))
556	}	1101	{
		1102	SvREADONLY_on (data);
		1103	req->flags |= FLAG_SV2_RO_OFF;
		1104	}
557		1105
		1106	REQ_SEND;
		1107	}
		1108	}
		1109
558	void	1110	void
559	aio_unlink(pathname,callback)	1111	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
560	SV * pathname	1112	ALIAS:
561	SV * callback	1113	aio_readlink = EIO_READLINK
562	PROTOTYPE: $$	1114	aio_realpath = EIO_REALPATH
		1115	PPCODE:
		1116	{
		1117	SV *data;
		1118	dREQ;
		1119
		1120	req->type = ix;
		1121	req->sv1 = newSVsv (path);
		1122	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1123
		1124	REQ_SEND;
		1125	}
		1126
		1127	void
		1128	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1129	PPCODE:
		1130	{
		1131	int ifd = s_fileno_croak (in_fh , 0);
		1132	int ofd = s_fileno_croak (out_fh, 1);
		1133	dREQ;
		1134
		1135	req->type = EIO_SENDFILE;
		1136	req->sv1 = newSVsv (out_fh);
		1137	req->int1 = ofd;
		1138	req->sv2 = newSVsv (in_fh);
		1139	req->int2 = ifd;
		1140	req->offs = in_offset;
		1141	req->size = length;
		1142
		1143	REQ_SEND;
		1144	}
		1145
		1146	void
		1147	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1148	PPCODE:
		1149	{
		1150	int fd = s_fileno_croak (fh, 0);
		1151	dREQ;
		1152
		1153	req->type = EIO_READAHEAD;
		1154	req->sv1 = newSVsv (fh);
		1155	req->int1 = fd;
		1156	req->offs = offset;
		1157	req->size = length;
		1158
		1159	REQ_SEND;
		1160	}
		1161
		1162	void
		1163	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1164	ALIAS:
		1165	aio_stat = EIO_STAT
		1166	aio_lstat = EIO_LSTAT
		1167	aio_statvfs = EIO_STATVFS
563	CODE:	1168	PPCODE:
564	{	1169	{
565	aio_req req;	1170	dREQ;
		1171
		1172	req->sv1 = newSVsv (fh_or_path);
		1173
		1174	if (SvPOK (req->sv1))
		1175	{
		1176	req->type = ix;
		1177	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1178	}
		1179	else
		1180	{
		1181	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		1182	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1183	}
		1184
		1185	REQ_SEND;
		1186	}
		1187
		1188	UV
		1189	major (UV dev)
		1190	ALIAS:
		1191	minor = 1
		1192	CODE:
		1193	RETVAL = ix ? major (dev) : minor (dev);
		1194	OUTPUT:
		1195	RETVAL
		1196
		1197	UV
		1198	makedev (UV maj, UV min)
		1199	CODE:
		1200	RETVAL = makedev (maj, min);
		1201	OUTPUT:
		1202	RETVAL
		1203
		1204	void
		1205	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1206	PPCODE:
		1207	{
		1208	dREQ;
		1209
		1210	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1211	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1212	req->sv1 = newSVsv (fh_or_path);
		1213
		1214	if (SvPOK (req->sv1))
		1215	{
		1216	req->type = EIO_UTIME;
		1217	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1218	}
		1219	else
		1220	{
		1221	req->type = EIO_FUTIME;
		1222	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1223	}
		1224
		1225	REQ_SEND;
		1226	}
		1227
		1228	void
		1229	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1230	PPCODE:
		1231	{
		1232	dREQ;
		1233
		1234	req->sv1 = newSVsv (fh_or_path);
		1235	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1236
		1237	if (SvPOK (req->sv1))
		1238	{
		1239	req->type = EIO_TRUNCATE;
		1240	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1241	}
		1242	else
		1243	{
		1244	req->type = EIO_FTRUNCATE;
		1245	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1246	}
		1247
		1248	REQ_SEND;
		1249	}
		1250
		1251	void
		1252	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1253	ALIAS:
		1254	aio_chmod = EIO_CHMOD
		1255	aio_mkdir = EIO_MKDIR
		1256	PPCODE:
		1257	{
		1258	dREQ;
		1259
		1260	req->int2 = mode;
		1261	req->sv1 = newSVsv (fh_or_path);
		1262
		1263	if (SvPOK (req->sv1))
		1264	{
		1265	req->type = ix;
		1266	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1267	}
		1268	else
		1269	{
		1270	req->type = EIO_FCHMOD;
		1271	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1272	}
		1273
		1274	REQ_SEND;
		1275	}
		1276
		1277	void
		1278	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1279	PPCODE:
		1280	{
		1281	dREQ;
		1282
		1283	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1284	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1285	req->sv1 = newSVsv (fh_or_path);
		1286
		1287	if (SvPOK (req->sv1))
		1288	{
		1289	req->type = EIO_CHOWN;
		1290	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1291	}
		1292	else
		1293	{
		1294	req->type = EIO_FCHOWN;
		1295	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1296	}
		1297
		1298	REQ_SEND;
		1299	}
		1300
		1301	void
		1302	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1303	PPCODE:
		1304	{
		1305	dREQ;
566		1306
567	Newz (0, req, 1, aio_cb);	1307	req->type = EIO_READDIR;
		1308	req->sv1 = newSVsv (pathname);
		1309	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1310	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1311
		1312	if (flags & EIO_READDIR_DENTS)
		1313	req->int1 |= EIO_READDIR_CUSTOM2;
		1314
		1315	REQ_SEND;
		1316	}
		1317
		1318	void
		1319	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1320	ALIAS:
		1321	aio_unlink = EIO_UNLINK
		1322	aio_rmdir = EIO_RMDIR
		1323	aio_readdir = EIO_READDIR
		1324	PPCODE:
		1325	{
		1326	dREQ;
568		1327
569	if (!req)	1328	req->type = ix;
570	croak ("out of memory during aio_req allocation");	1329	req->sv1 = newSVsv (pathname);
		1330	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1331
		1332	REQ_SEND;
		1333	}
		1334
		1335	void
		1336	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1337	ALIAS:
		1338	aio_link = EIO_LINK
		1339	aio_symlink = EIO_SYMLINK
		1340	aio_rename = EIO_RENAME
		1341	PPCODE:
		1342	{
		1343	dREQ;
571		1344
572	req->type = REQ_UNLINK;	1345	req->type = ix;
573	req->data = newSVsv (pathname);	1346	req->sv1 = newSVsv (oldpath);
574	req->dataptr = SvPV_nolen (req->data);	1347	req->ptr1 = SvPVbyte_nolen (req->sv1);
575	req->callback = SvREFCNT_inc (callback);	1348	req->sv2 = newSVsv (newpath);
		1349	req->ptr2 = SvPVbyte_nolen (req->sv2);
576		1350
577	send_req (req);	1351	REQ_SEND;
		1352	}
		1353
		1354	void
		1355	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1356	PPCODE:
		1357	{
		1358	dREQ;
		1359
		1360	req->type = EIO_MKNOD;
		1361	req->sv1 = newSVsv (pathname);
		1362	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1363	req->int2 = (mode_t)mode;
		1364	req->offs = dev;
		1365
		1366	REQ_SEND;
		1367	}
		1368
		1369	void
		1370	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1371	ALIAS:
		1372	aio_mtouch = EIO_MTOUCH
		1373	aio_msync = EIO_MSYNC
		1374	PPCODE:
		1375	{
		1376	STRLEN svlen;
		1377	char *svptr = SvPVbyte (data, svlen);
		1378	UV len = SvUV (length);
		1379
		1380	if (offset < 0)
		1381	offset += svlen;
		1382
		1383	if (offset < 0 || offset > svlen)
		1384	croak ("offset outside of scalar");
		1385
		1386	if (!SvOK (length) || len + offset > svlen)
		1387	len = svlen - offset;
		1388
		1389	{
		1390	dREQ;
		1391
		1392	req->type = ix;
		1393	req->sv2 = SvREFCNT_inc (data);
		1394	req->ptr2 = (char *)svptr + offset;
		1395	req->size = len;
		1396	req->int1 = flags;
		1397
		1398	REQ_SEND;
		1399	}
		1400	}
		1401
		1402	void
		1403	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1404	PPCODE:
		1405	{
		1406	STRLEN svlen;
		1407	char *svptr = SvPVbyte (data, svlen);
		1408	UV len = SvUV (length);
		1409
		1410	if (offset < 0)
		1411	offset += svlen;
		1412
		1413	if (offset < 0 || offset > svlen)
		1414	croak ("offset outside of scalar");
		1415
		1416	if (!SvOK (length) || len + offset > svlen)
		1417	len = svlen - offset;
		1418
		1419	{
		1420	dREQ;
		1421
		1422	req->type = EIO_MLOCK;
		1423	req->sv2 = SvREFCNT_inc (data);
		1424	req->ptr2 = (char *)svptr + offset;
		1425	req->size = len;
		1426
		1427	REQ_SEND;
		1428	}
		1429	}
		1430
		1431	void
		1432	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1433	PPCODE:
		1434	{
		1435	dREQ;
		1436
		1437	req->type = EIO_MLOCKALL;
		1438	req->int1 = flags;
		1439
		1440	REQ_SEND;
		1441	}
		1442
		1443	void
		1444	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1445	PPCODE:
		1446	{
		1447	dREQ;
		1448
		1449	req->type = EIO_BUSY;
		1450	req->nv1 = delay < 0. ? 0. : delay;
		1451
		1452	REQ_SEND;
		1453	}
		1454
		1455	void
		1456	aio_group (SV *callback=&PL_sv_undef)
		1457	PPCODE:
		1458	{
		1459	dREQ;
		1460
		1461	req->type = EIO_GROUP;
		1462
		1463	req_submit (req);
		1464	XPUSHs (req_sv (req, aio_grp_stash));
		1465	}
		1466
		1467	void
		1468	aio_nop (SV *callback=&PL_sv_undef)
		1469	ALIAS:
		1470	aio_nop = EIO_NOP
		1471	aio_sync = EIO_SYNC
		1472	PPCODE:
		1473	{
		1474	dREQ;
		1475
		1476	req->type = ix;
		1477
		1478	REQ_SEND;
578	}	1479	}
579		1480
580	int	1481	int
581	poll_fileno()	1482	aioreq_pri (int pri = 0)
582	PROTOTYPE:
583	CODE:	1483	CODE:
584	RETVAL = respipe [0];	1484	RETVAL = next_pri;
		1485	if (items > 0)
		1486	{
		1487	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1488	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1489	next_pri = pri;
		1490	}
585	OUTPUT:	1491	OUTPUT:
586	RETVAL	1492	RETVAL
587		1493
		1494	void
		1495	aioreq_nice (int nice = 0)
		1496	CODE:
		1497	nice = next_pri - nice;
		1498	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1499	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1500	next_pri = nice;
		1501
		1502	void
		1503	flush ()
		1504	CODE:
		1505	while (eio_nreqs ())
		1506	{
		1507	poll_wait ();
		1508	poll_cb ();
		1509	}
		1510
588	int	1511	int
589	poll_cb(...)	1512	poll ()
590	PROTOTYPE:
591	CODE:	1513	CODE:
		1514	poll_wait ();
592	RETVAL = poll_cb (aTHX);	1515	RETVAL = poll_cb ();
593	OUTPUT:	1516	OUTPUT:
594	RETVAL	1517	RETVAL
595		1518
596	void
597	poll_wait()
598	PROTOTYPE:
599	CODE:
600	if (nreqs)
601	poll_wait ();
602
603	int	1519	int
604	nreqs()	1520	poll_fileno ()
605	PROTOTYPE:
606	CODE:	1521	CODE:
607	RETVAL = nreqs;	1522	RETVAL = s_epipe_fd (&respipe);
608	OUTPUT:	1523	OUTPUT:
609	RETVAL	1524	RETVAL
610		1525
		1526	int
		1527	poll_cb (...)
		1528	PROTOTYPE:
		1529	CODE:
		1530	RETVAL = poll_cb ();
		1531	OUTPUT:
		1532	RETVAL
		1533
		1534	void
		1535	poll_wait ()
		1536	CODE:
		1537	poll_wait ();
		1538
		1539	int
		1540	nreqs ()
		1541	CODE:
		1542	RETVAL = eio_nreqs ();
		1543	OUTPUT:
		1544	RETVAL
		1545
		1546	int
		1547	nready ()
		1548	CODE:
		1549	RETVAL = eio_nready ();
		1550	OUTPUT:
		1551	RETVAL
		1552
		1553	int
		1554	npending ()
		1555	CODE:
		1556	RETVAL = eio_npending ();
		1557	OUTPUT:
		1558	RETVAL
		1559
		1560	int
		1561	nthreads ()
		1562	CODE:
		1563	RETVAL = eio_nthreads ();
		1564	OUTPUT:
		1565	RETVAL
		1566
		1567	int
		1568	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1569	CODE:
		1570	RETVAL = posix_fadvise (fh, offset, length, advice);
		1571	OUTPUT:
		1572	RETVAL
		1573
		1574	ssize_t
		1575	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1576	CODE:
		1577	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1578	OUTPUT:
		1579	RETVAL
		1580
		1581	void
		1582	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1583	PPCODE:
		1584	sv_unmagic (scalar, MMAP_MAGIC);
		1585	{
		1586	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1587	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1588	if (addr == (void *)-1)
		1589	XSRETURN_NO;
		1590
		1591	sv_force_normal (scalar);
		1592
		1593	/* we store the length in mg_obj, as namlen is I32 :/ */
		1594	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1595	->mg_obj = (SV *)length;
		1596
		1597	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1598
		1599	if (!(prot & PROT_WRITE))
		1600	SvREADONLY_on (scalar);
		1601
		1602	if (SvLEN (scalar))
		1603	Safefree (SvPVX (scalar));
		1604
		1605	SvPVX (scalar) = (char *)addr;
		1606	SvCUR_set (scalar, length);
		1607	SvLEN_set (scalar, 0);
		1608	SvPOK_only (scalar);
		1609
		1610	XSRETURN_YES;
		1611	}
		1612
		1613	void
		1614	munmap (SV *scalar)
		1615	CODE:
		1616	sv_unmagic (scalar, MMAP_MAGIC);
		1617
		1618	int
		1619	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1620	ALIAS:
		1621	mprotect = 1
		1622	CODE:
		1623	{
		1624	STRLEN svlen;
		1625	void *addr = SvPVbyte (scalar, svlen);
		1626	size_t len = SvUV (length);
		1627
		1628	if (offset < 0)
		1629	offset += svlen;
		1630
		1631	if (offset < 0 || offset > svlen)
		1632	croak ("offset outside of scalar");
		1633
		1634	if (!SvOK (length) || len + offset > svlen)
		1635	len = svlen - offset;
		1636
		1637	addr = (void *)(((intptr_t)addr) + offset);
		1638	eio_page_align (&addr, &len);
		1639
		1640	switch (ix)
		1641	{
		1642	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1643	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1644	}
		1645	}
		1646	OUTPUT:
		1647	RETVAL
		1648
		1649	int
		1650	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1651	CODE:
		1652	{
		1653	STRLEN svlen;
		1654	void *addr = SvPVbyte (scalar, svlen);
		1655	size_t len = SvUV (length);
		1656
		1657	if (offset < 0)
		1658	offset += svlen;
		1659
		1660	if (offset < 0 || offset > svlen)
		1661	croak ("offset outside of scalar");
		1662
		1663	if (!SvOK (length) || len + offset > svlen)
		1664	len = svlen - offset;
		1665
		1666	addr = (void *)(((intptr_t)addr) + offset);
		1667	eio_page_align (&addr, &len);
		1668	#if _POSIX_MEMLOCK_RANGE
		1669	RETVAL = munlock (addr, len);
		1670	#else
		1671	RETVAL = ((errno = ENOSYS), -1);
		1672	#endif
		1673	}
		1674	OUTPUT:
		1675	RETVAL
		1676
		1677	int
		1678	munlockall ()
		1679	CODE:
		1680	#if _POSIX_MEMLOCK
		1681	munlockall ();
		1682	#else
		1683	RETVAL = -1;
		1684	errno = ENOSYS;
		1685	#endif
		1686	OUTPUT:
		1687	RETVAL
		1688
		1689	void _on_next_submit (SV *cb)
		1690	CODE:
		1691	SvREFCNT_dec (on_next_submit);
		1692	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1693
		1694	PROTOTYPES: DISABLE
		1695
		1696	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1697
		1698	void
		1699	cancel (aio_req_ornot req)
		1700	CODE:
		1701	eio_cancel (req);
		1702
		1703	void
		1704	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1705	PPCODE:
		1706	{
		1707	if (GIMME_V != G_VOID)
		1708	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1709
		1710	if (items > 1)
		1711	{
		1712	SV *cb_cv =get_cb (callback);
		1713
		1714	SvREFCNT_dec (req->callback);
		1715	req->callback = SvREFCNT_inc (cb_cv);
		1716	}
		1717	}
		1718
		1719	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1720
		1721	void
		1722	add (aio_req grp, ...)
		1723	PPCODE:
		1724	{
		1725	int i;
		1726
		1727	if (grp->int1 == 2)
		1728	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1729
		1730	for (i = 1; i < items; ++i )
		1731	{
		1732	aio_req req;
		1733
		1734	if (GIMME_V != G_VOID)
		1735	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1736
		1737	req = SvAIO_REQ (ST (i));
		1738
		1739	if (req)
		1740	eio_grp_add (grp, req);
		1741	}
		1742	}
		1743
		1744	void
		1745	cancel_subs (aio_req_ornot req)
		1746	CODE:
		1747	req_cancel_subs (req);
		1748
		1749	void
		1750	result (aio_req grp, ...)
		1751	CODE:
		1752	{
		1753	int i;
		1754	AV *av;
		1755
		1756	grp->errorno = errno;
		1757
		1758	av = newAV ();
		1759	av_extend (av, items - 1);
		1760
		1761	for (i = 1; i < items; ++i )
		1762	av_push (av, newSVsv (ST (i)));
		1763
		1764	SvREFCNT_dec (grp->sv1);
		1765	grp->sv1 = (SV *)av;
		1766	}
		1767
		1768	void
		1769	errno (aio_req grp, int errorno = errno)
		1770	CODE:
		1771	grp->errorno = errorno;
		1772
		1773	void
		1774	limit (aio_req grp, int limit)
		1775	CODE:
		1776	eio_grp_limit (grp, limit);
		1777
		1778	void
		1779	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1780	CODE:
		1781	{
		1782	SvREFCNT_dec (grp->sv2);
		1783	grp->sv2 = newSVsv (callback);
		1784	grp->feed = aio_grp_feed;
		1785
		1786	if (grp->int2 <= 0)
		1787	grp->int2 = 2;
		1788
		1789	eio_grp_limit (grp, grp->int2);
		1790	}
		1791

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