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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.18 by root, Sun Jul 31 19:00:31 2005 UTC vs.
Revision 1.180 by root, Fri Feb 11 00:05:17 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	#include "autoconf/config.h"	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		16	#include <sys/statvfs.h>
10	#include <unistd.h>	17	#include <limits.h>
11	#include <fcntl.h>	18	#include <fcntl.h>
12	#include <signal.h>
13	#include <sched.h>	19	#include <sched.h>
14		20
15	#ifndef _REENTRANT	21	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
16	# define _REENTRANT 1	22	# include <sys/mman.h>
17	#endif	23	#endif
18	#include <errno.h>
19		24
20	#include <pthread.h>	25	/* perl namespace pollution */
		26	#undef VERSION
21		27
22	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	28	#ifdef _WIN32
23	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
24	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
25		29
26	#if __ia64	30	# define EIO_STRUCT_DIRENT Direntry_t
27	# define STACKSIZE 65536	31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
28	#else	66	#else
29	# define STACKSIZE 4096	67
		68	# include <sys/time.h>
		69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/config.h"
		124	#include "libeio/eio.h"
		125
		126	#ifndef POSIX_FADV_NORMAL
		127	# define POSIX_FADV_NORMAL 0
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#if !HAVE_POSIX_FADVISE
		146	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		147	#endif
		148
		149	#ifndef POSIX_MADV_NORMAL
		150	# define POSIX_MADV_NORMAL 0
		151	#endif
		152	#ifndef POSIX_MADV_SEQUENTIAL
		153	# define POSIX_MADV_SEQUENTIAL 0
		154	#endif
		155	#ifndef POSIX_MADV_RANDOM
		156	# define POSIX_MADV_RANDOM 0
		157	#endif
		158	#ifndef POSIX_MADV_WILLNEED
		159	# define POSIX_MADV_WILLNEED 0
		160	#endif
		161	#ifndef POSIX_MADV_DONTNEED
		162	# define POSIX_MADV_DONTNEED 0
		163	#endif
		164
		165	#if !HAVE_POSIX_MADVISE
		166	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		167	#endif
		168
		169	#ifndef PROT_NONE
		170	# define PROT_NONE 0
		171	#endif
		172	#ifndef PROT_READ
		173	# define PROT_READ 0
		174	#endif
		175	#ifndef PROT_WRITE
		176	# define PROT_READ 0
		177	#endif
		178	#ifndef PROT_EXEC
		179	# define PROT_EXEC 0
		180	#endif
		181
		182	#ifndef ST_NODEV
		183	# define ST_NODEV 0
		184	#endif
		185	#ifndef ST_NOEXEC
		186	# define ST_NOEXEC 0
		187	#endif
		188	#ifndef ST_SYNCHRONOUS
		189	# define ST_SYNCHRONOUS 0
		190	#endif
		191	#ifndef ST_MANDLOCK
		192	# define ST_MANDLOCK 0
		193	#endif
		194	#ifndef ST_WRITE
		195	# define ST_WRITE 0
		196	#endif
		197	#ifndef ST_APPEND
		198	# define ST_APPEND 0
		199	#endif
		200	#ifndef ST_IMMUTABLE
		201	# define ST_IMMUTABLE 0
		202	#endif
		203	#ifndef ST_NOATIME
		204	# define ST_NOATIME 0
		205	#endif
		206	#ifndef ST_NODIRATIME
		207	# define ST_NODIRATIME 0
		208	#endif
		209	#ifndef ST_RELATIME
		210	# define ST_RELATIME 0
		211	#endif
		212
		213	#ifndef S_IFIFO
		214	# define S_IFIFO 0
		215	#endif
		216	#ifndef S_IFCHR
		217	# define S_IFCHR 0
		218	#endif
		219	#ifndef S_IFBLK
		220	# define S_IFBLK 0
		221	#endif
		222	#ifndef S_IFLNK
		223	# define S_IFLNK 0
		224	#endif
		225	#ifndef S_IFREG
		226	# define S_IFREG 0
		227	#endif
		228	#ifndef S_IFDIR
		229	# define S_IFDIR 0
		230	#endif
		231	#ifndef S_IFWHT
		232	# define S_IFWHT 0
		233	#endif
		234	#ifndef S_IFSOCK
		235	# define S_IFSOCK 0
		236	#endif
		237
		238	#ifndef MAP_ANONYMOUS
		239	# ifdef MAP_ANON
		240	# define MAP_ANONYMOUS MAP_ANON
		241	# else
		242	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
30	#endif	243	# endif
		244	#endif
		245	#ifndef MAP_HUGETLB
		246	# define MAP_HUGETLB 0
		247	#endif
		248	#ifndef MAP_LOCKED
		249	# define MAP_LOCKED 0
		250	#endif
		251	#ifndef MAP_NORESERVE
		252	# define MAP_NORESERVE 0
		253	#endif
		254	#ifndef MAP_POPULATE
		255	# define MAP_POPULATE 0
		256	#endif
		257	#ifndef MAP_NONBLOCK
		258	# define MAP_NONBLOCK 0
		259	#endif
		260
		261	#ifndef makedev
		262	# define makedev(maj,min) (((maj) << 8) | (min))
		263	#endif
		264	#ifndef major
		265	# define major(dev) ((dev) >> 8)
		266	#endif
		267	#ifndef minor
		268	# define minor(dev) ((dev) & 0xff)
		269	#endif
		270
		271	#ifndef PAGESIZE
		272	# define PAGESIZE sysconf (_SC_PAGESIZE)
		273	#endif
		274
		275	static int req_invoke (eio_req *req);
		276	#define EIO_FINISH(req) req_invoke (req)
		277	static void req_destroy (eio_req *grp);
		278	#define EIO_DESTROY(req) req_destroy (req)
31		279
32	enum {	280	enum {
33	REQ_QUIT,	281	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
34	REQ_OPEN, REQ_CLOSE,
35	REQ_READ, REQ_WRITE, REQ_READAHEAD,
36	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
37	REQ_FSYNC, REQ_FDATASYNC,
38	};	282	};
39		283
40	typedef struct aio_cb {	284	#include "libeio/eio.c"
41	struct aio_cb *volatile next;
42		285
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	286	typedef eio_req *aio_req;
		287	typedef eio_req *aio_req_ornot;
59		288
60	static int started;	289	static SV *on_next_submit;
61	static volatile int nreqs;	290	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	291	static int max_outstanding;
63	static int respipe [2];
64		292
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	293	static s_epipe respipe;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
68		294
69	static volatile aio_req reqs, reqe; /* queue start, queue end */	295	static void req_destroy (aio_req req);
70	static volatile aio_req ress, rese; /* queue start, queue end */	296	static void req_cancel (aio_req req);
71		297
72	static void	298	static void want_poll (void)
73	poll_wait ()
74	{	299	{
75	if (nreqs && !ress)	300	/* write a dummy byte to the pipe so fh becomes ready */
		301	s_epipe_signal (&respipe);
		302	}
		303
		304	static void done_poll (void)
		305	{
		306	/* read any signals sent by the worker threads */
		307	s_epipe_drain (&respipe);
		308	}
		309
		310	/* must be called at most once */
		311	static SV *req_sv (aio_req req, HV *stash)
		312	{
		313	if (!req->self)
76	{	314	{
77	fd_set rfd;	315	req->self = (SV *)newHV ();
78	FD_ZERO(&rfd);	316	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
79	FD_SET(respipe [0], &rfd);
80
81	select (respipe [0] + 1, &rfd, 0, 0, 0);
82	}	317	}
83	}
84		318
85	static int	319	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
86	poll_cb ()	320	}
87	{
88	dSP;
89	int count = 0;
90	aio_req req, prv;
91		321
92	pthread_mutex_lock (&reslock);	322	static aio_req SvAIO_REQ (SV *sv)
		323	{
		324	MAGIC *mg;
93		325
94	{	326	if (!SvROK (sv)
95	/* read any signals sent by the worker threads */	327	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
96	char buf [32];	328	&& SvSTASH (SvRV (sv)) != aio_req_stash
97	while (read (respipe [0], buf, 32) > 0)	329	&& !sv_derived_from (sv, "IO::AIO::REQ")))
98	;	330	croak ("object of class IO::AIO::REQ expected");
99	}
100		331
101	req = ress;	332	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
102	ress = rese = 0;
103		333
104	pthread_mutex_unlock (&reslock);	334	return mg ? (aio_req)mg->mg_ptr : 0;
		335	}
105		336
106	while (req)	337	static void aio_grp_feed (aio_req grp)
		338	{
		339	if (grp->sv2 && SvOK (grp->sv2))
107	{	340	{
108	nreqs--;	341	dSP;
109		342
110	if (req->type == REQ_QUIT)	343	ENTER;
111	started--;	344	SAVETMPS;
112	else	345	PUSHMARK (SP);
		346	XPUSHs (req_sv (grp, aio_grp_stash));
		347	PUTBACK;
		348	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		349	SPAGAIN;
		350	FREETMPS;
		351	LEAVE;
		352	}
		353	}
		354
		355	static void req_submit (eio_req *req)
		356	{
		357	eio_submit (req);
		358
		359	if (expect_false (on_next_submit))
		360	{
		361	dSP;
		362	SV *cb = sv_2mortal (on_next_submit);
		363
		364	on_next_submit = 0;
		365
		366	PUSHMARK (SP);
		367	PUTBACK;
		368	call_sv (cb, G_DISCARD | G_EVAL);
		369	}
		370	}
		371
		372	static int req_invoke (eio_req *req)
		373	{
		374	if (req->flags & FLAG_SV2_RO_OFF)
		375	SvREADONLY_off (req->sv2);
		376
		377	if (!EIO_CANCELLED (req) && req->callback)
		378	{
		379	dSP;
		380	static SV *sv_result_cache; /* caches the result integer SV */
		381	SV *sv_result;
		382
		383	ENTER;
		384	SAVETMPS;
		385	PUSHMARK (SP);
		386	EXTEND (SP, 1);
		387
		388	/* do not recreate the result IV from scratch each time */
		389	if (expect_true (sv_result_cache))
113	{	390	{
114	int errorno = errno;	391	sv_result = sv_result_cache; sv_result_cache = 0;
115	errno = req->errorno;	392	SvIV_set (sv_result, req->result);
116		393	SvIOK_only (sv_result);
117	if (req->type == REQ_READ)
118	SvCUR_set (req->data, req->dataoffset
119	+ req->result > 0 ? req->result : 0);
120
121	if (req->data)
122	SvREFCNT_dec (req->data);
123
124	if (req->fh)
125	SvREFCNT_dec (req->fh);
126
127	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
128	{
129	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
130	PL_laststatval = req->result;
131	PL_statcache = *(req->statdata);
132
133	Safefree (req->statdata);
134	}
135
136	ENTER;
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 = SvREFCNT_inc (POPs);
150
151	PUSHMARK (SP);
152	XPUSHs (sv_2mortal (fh));
153	}
154
155	if (SvOK (req->callback))
156	{
157	PUTBACK;
158	call_sv (req->callback, G_VOID | G_EVAL);
159	SPAGAIN;
160	}
161
162	LEAVE;
163
164	if (req->callback)
165	SvREFCNT_dec (req->callback);
166
167	errno = errorno;
168	count++;
169	}
170
171	prv = req;
172	req = req->next;
173	Safefree (prv);
174
175	/* TODO: croak on errors? */
176	}
177
178	return count;
179	}
180
181	static void *aio_proc(void *arg);
182
183	static void
184	start_thread (void)
185	{
186	sigset_t fullsigset, oldsigset;
187	pthread_t tid;
188	pthread_attr_t attr;
189
190	pthread_attr_init (&attr);
191	pthread_attr_setstacksize (&attr, STACKSIZE);
192	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
193
194	sigfillset (&fullsigset);
195	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
196
197	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
198	started++;
199
200	sigprocmask (SIG_SETMASK, &oldsigset, 0);
201	}
202
203	static void
204	send_req (aio_req req)
205	{
206	nreqs++;
207
208	pthread_mutex_lock (&reqlock);
209
210	req->next = 0;
211
212	if (reqe)
213	{
214	reqe->next = req;
215	reqe = req;
216	}
217	else
218	reqe = reqs = req;
219
220	pthread_cond_signal (&reqwait);
221	pthread_mutex_unlock (&reqlock);
222
223	while (nreqs > max_outstanding)
224	{
225	poll_wait ();
226	poll_cb ();
227	}
228	}
229
230	static void
231	end_thread (void)
232	{
233	aio_req req;
234	New (0, req, 1, aio_cb);
235	req->type = REQ_QUIT;
236
237	send_req (req);
238	}
239
240	/* work around various missing functions */
241
242	#if !HAVE_PREADWRITE
243	# define pread aio_pread
244	# define pwrite aio_pwrite
245
246	/*
247	* make our pread/pwrite safe against themselves, but not against
248	* normal read/write by using a mutex. slows down execution a lot,
249	* but that's your problem, not mine.
250	*/
251	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
252
253	static ssize_t
254	pread (int fd, void *buf, size_t count, off_t offset)
255	{
256	ssize_t res;
257	off_t ooffset;
258
259	pthread_mutex_lock (&iolock);
260	ooffset = lseek (fd, 0, SEEK_CUR);
261	lseek (fd, offset, SEEK_SET);
262	res = read (fd, buf, count);
263	lseek (fd, ooffset, SEEK_SET);
264	pthread_mutex_unlock (&iolock);
265
266	return res;
267	}
268
269	static ssize_t
270	pwrite (int fd, void *buf, size_t count, off_t offset)
271	{
272	ssize_t res;
273	off_t ooffset;
274
275	pthread_mutex_lock (&iolock);
276	ooffset = lseek (fd, 0, SEEK_CUR);
277	lseek (fd, offset, SEEK_SET);
278	res = write (fd, buf, count);
279	lseek (fd, offset, SEEK_SET);
280	pthread_mutex_unlock (&iolock);
281
282	return res;
283	}
284	#endif
285
286	#if !HAVE_FDATASYNC
287	# define fdatasync fsync
288	#endif
289
290	#if !HAVE_READAHEAD
291	# define readahead aio_readahead
292
293	static char readahead_buf[4096];
294
295	static ssize_t
296	readahead (int fd, off_t offset, size_t count)
297	{
298	while (count > 0)
299	{
300	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
301
302	pread (fd, readahead_buf, len, offset);
303	offset += len;
304	count -= len;
305	}
306
307	errno = 0;
308	}
309	#endif
310
311	static void *
312	aio_proc (void *thr_arg)
313	{
314	aio_req req;
315	int type;
316
317	do
318	{
319	pthread_mutex_lock (&reqlock);
320
321	for (;;)
322	{
323	req = reqs;
324
325	if (reqs)
326	{
327	reqs = reqs->next;
328	if (!reqs) reqe = 0;
329	}
330
331	if (req)
332	break;
333
334	pthread_cond_wait (&reqwait, &reqlock);
335	}
336
337	pthread_mutex_unlock (&reqlock);
338
339	errno = 0; /* strictly unnecessary */
340
341	type = req->type;
342
343	switch (type)
344	{
345	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
346	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
347
348	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
349
350	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
351	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
352	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
353
354	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
355	case REQ_CLOSE: req->result = close (req->fd); break;
356	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
357
358	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
359	case REQ_FSYNC: req->result = fsync (req->fd); break;
360
361	case REQ_QUIT:
362	break;
363
364	default:
365	req->result = ENOSYS;
366	break;
367	}
368
369	req->errorno = errno;
370
371	pthread_mutex_lock (&reslock);
372
373	req->next = 0;
374
375	if (rese)
376	{
377	rese->next = req;
378	rese = req;
379	}	394	}
380	else	395	else
381	{	396	{
382	rese = ress = req;	397	sv_result = newSViv (req->result);
383		398	SvREADONLY_on (sv_result);
384	/* write a dummy byte to the pipe so fh becomes ready */
385	write (respipe [1], &respipe, 1);
386	}	399	}
387		400
388	pthread_mutex_unlock (&reslock);	401	switch (req->type)
		402	{
		403	case EIO_READDIR:
		404	{
		405	SV *rv = &PL_sv_undef;
		406
		407	if (req->result >= 0)
		408	{
		409	int i;
		410	char *names = (char *)req->ptr2;
		411	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		412	AV *av = newAV ();
		413
		414	av_extend (av, req->result - 1);
		415
		416	for (i = 0; i < req->result; ++i)
		417	{
		418	if (req->int1 & EIO_READDIR_DENTS)
		419	{
		420	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		421
		422	if (req->int1 & EIO_READDIR_CUSTOM2)
		423	{
		424	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		425	AV *avent = newAV ();
		426
		427	av_extend (avent, 2);
		428
		429	if (!sv_type [ent->type])
		430	{
		431	sv_type [ent->type] = newSViv (ent->type);
		432	SvREADONLY_on (sv_type [ent->type]);
		433	}
		434
		435	av_store (avent, 0, namesv);
		436	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		437	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		438
		439	av_store (av, i, newRV_noinc ((SV *)avent));
		440	}
		441	else
		442	av_store (av, i, namesv);
		443
		444	++ent;
		445	}
		446	else
		447	{
		448	SV *name = newSVpv (names, 0);
		449	av_store (av, i, name);
		450	names += SvCUR (name) + 1;
		451	}
		452	}
		453
		454	rv = sv_2mortal (newRV_noinc ((SV *)av));
		455	}
		456
		457	PUSHs (rv);
		458
		459	if (req->int1 & EIO_READDIR_CUSTOM1)
		460	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		461	}
		462	break;
		463
		464	case EIO_OPEN:
		465	{
		466	/* convert fd to fh */
		467	SV *fh = &PL_sv_undef;
		468
		469	if (req->result >= 0)
		470	{
		471	GV *gv = (GV *)sv_newmortal ();
		472	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		473	char sym [64];
		474	int symlen;
		475
		476	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		477	gv_init (gv, aio_stash, sym, symlen, 0);
		478
		479	symlen = snprintf (
		480	sym,
		481	sizeof (sym),
		482	"%s&=%d",
		483	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		484	(int)req->result
		485	);
		486
		487	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		488	fh = (SV *)gv;
		489	}
		490
		491	PUSHs (fh);
		492	}
		493	break;
		494
		495	case EIO_STATVFS:
		496	case EIO_FSTATVFS:
		497	{
		498	SV *rv = &PL_sv_undef;
		499
		500	if (req->result >= 0)
		501	{
		502	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		503	HV *hv = newHV ();
		504
		505	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		506
		507	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		508	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		509	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		510	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		511	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		512	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		513	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		514	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		515	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		516	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		517	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		518	}
		519
		520	PUSHs (rv);
		521	}
		522
		523	break;
		524
		525	case EIO_GROUP:
		526	req->int1 = 2; /* mark group as finished */
		527
		528	if (req->sv1)
		529	{
		530	int i;
		531	AV *av = (AV *)req->sv1;
		532
		533	EXTEND (SP, AvFILL (av) + 1);
		534	for (i = 0; i <= AvFILL (av); ++i)
		535	PUSHs (*av_fetch (av, i, 0));
		536	}
		537	break;
		538
		539	case EIO_NOP:
		540	case EIO_BUSY:
		541	break;
		542
		543	case EIO_READLINK:
		544	if (req->result > 0)
		545	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		546	break;
		547
		548	case EIO_STAT:
		549	case EIO_LSTAT:
		550	case EIO_FSTAT:
		551	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		552	PL_laststatval = req->result;
		553	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		554	PUSHs (sv_result);
		555	break;
		556
		557	case EIO_READ:
		558	{
		559	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		560	*SvEND (req->sv2) = 0;
		561	SvPOK_only (req->sv2);
		562	SvSETMAGIC (req->sv2);
		563	PUSHs (sv_result);
		564	}
		565	break;
		566
		567	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		568	if (req->result > 0)
		569	SvIV_set (sv_result, 0);
		570	/* FALLTHROUGH */
		571
		572	default:
		573	PUSHs (sv_result);
		574	break;
		575	}
		576
		577	errno = req->errorno;
		578
		579	PUTBACK;
		580	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		581	SPAGAIN;
		582
		583	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		584	SvREFCNT_dec (sv_result);
		585	else
		586	sv_result_cache = sv_result;
		587
		588	FREETMPS;
		589	LEAVE;
		590
		591	PUTBACK;
389	}	592	}
390	while (type != REQ_QUIT);	593
		594	return !!SvTRUE (ERRSV);
		595	}
		596
		597	static void req_destroy (aio_req req)
		598	{
		599	if (req->self)
		600	{
		601	sv_unmagic (req->self, PERL_MAGIC_ext);
		602	SvREFCNT_dec (req->self);
		603	}
		604
		605	SvREFCNT_dec (req->sv1);
		606	SvREFCNT_dec (req->sv2);
		607	SvREFCNT_dec (req->callback);
		608
		609	Safefree (req);
		610	}
		611
		612	static void req_cancel_subs (aio_req grp)
		613	{
		614	aio_req sub;
		615
		616	if (grp->type != EIO_GROUP)
		617	return;
		618
		619	SvREFCNT_dec (grp->sv2);
		620	grp->sv2 = 0;
		621
		622	eio_grp_cancel (grp);
		623	}
		624
		625	static void
		626	create_respipe (void)
		627	{
		628	if (s_epipe_renew (&respipe))
		629	croak ("IO::AIO: unable to initialize result pipe");
		630	}
		631
		632	static void poll_wait (void)
		633	{
		634	while (eio_nreqs ())
		635	{
		636	int size;
		637
		638	X_LOCK (reslock);
		639	size = res_queue.size;
		640	X_UNLOCK (reslock);
		641
		642	if (size)
		643	return;
		644
		645	etp_maybe_start_thread ();
		646
		647	s_epipe_wait (&respipe);
		648	}
		649	}
		650
		651	static int poll_cb (void)
		652	{
		653	for (;;)
		654	{
		655	int res = eio_poll ();
		656
		657	if (res > 0)
		658	croak (0);
		659
		660	if (!max_outstanding || max_outstanding > eio_nreqs ())
		661	return res;
		662
		663	poll_wait ();
		664	}
		665	}
		666
		667	static void atfork_child (void)
		668	{
		669	create_respipe ();
		670	}
		671
		672	/*****************************************************************************/
		673
		674	#if !_POSIX_MAPPED_FILES
		675	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		676	# define munmap(addr,length) (errno = ENOSYS, -1)
		677	#endif
		678
		679	#if !_POSIX_MEMORY_PROTECTION
		680	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		681	# define PROT_NONE 0
		682	# define PROT_WRITE 0
		683	# define MAP_PRIVATE 0
		684	# define MAP_SHARED 0
		685	# define MAP_FIXED 0
		686	#endif
		687
		688	#define MMAP_MAGIC PERL_MAGIC_ext
		689
		690	static int
		691	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		692	{
		693	int old_errno = errno;
		694	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		695	errno = old_errno;
		696
		697	mg->mg_obj = 0; /* just in case */
		698
		699	SvREADONLY_off (sv);
		700
		701	if (SvPVX (sv) != mg->mg_ptr)
		702	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		703
		704	SvCUR_set (sv, 0);
		705	SvPVX (sv) = 0;
		706	SvOK_off (sv);
391		707
392	return 0;	708	return 0;
393	}	709	}
394		710
		711	static MGVTBL mmap_vtbl = {
		712	0, 0, 0, 0, mmap_free
		713	};
		714
		715	/*****************************************************************************/
		716
		717	static SV *
		718	get_cb (SV *cb_sv)
		719	{
		720	SvGETMAGIC (cb_sv);
		721	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		722	}
		723
		724	#define dREQ \
		725	SV *cb_cv; \
		726	aio_req req; \
		727	int req_pri = next_pri; \
		728	next_pri = EIO_PRI_DEFAULT; \
		729	\
		730	cb_cv = get_cb (callback); \
		731	\
		732	Newz (0, req, 1, eio_req); \
		733	if (!req) \
		734	croak ("out of memory during eio_req allocation"); \
		735	\
		736	req->callback = SvREFCNT_inc (cb_cv); \
		737	req->pri = req_pri
		738
		739	#define REQ_SEND \
		740	PUTBACK; \
		741	req_submit (req); \
		742	SPAGAIN; \
		743	\
		744	if (GIMME_V != G_VOID) \
		745	XPUSHs (req_sv (req, aio_req_stash));
		746
395	MODULE = IO::AIO PACKAGE = IO::AIO	747	MODULE = IO::AIO PACKAGE = IO::AIO
396		748
397	PROTOTYPES: ENABLE	749	PROTOTYPES: ENABLE
398		750
399	BOOT:	751	BOOT:
400	{	752	{
401	if (pipe (respipe))	753	static const struct {
402	croak ("unable to initialize result pipe");	754	const char *name;
		755	IV iv;
		756	} *civ, const_iv[] = {
		757	# define const_niv(name, value) { # name, (IV) value },
		758	# define const_iv(name) { # name, (IV) name },
		759	# define const_eio(name) { # name, (IV) EIO_ ## name },
		760	const_iv (EXDEV)
		761	const_iv (ENOSYS)
		762	const_iv (O_RDONLY)
		763	const_iv (O_WRONLY)
		764	const_iv (O_RDWR)
		765	const_iv (O_CREAT)
		766	const_iv (O_TRUNC)
		767	const_iv (O_EXCL)
		768	const_iv (O_APPEND)
403		769
404	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	770	const_iv (S_IFIFO)
405	croak ("cannot set result pipe to nonblocking mode");	771	const_iv (S_IFCHR)
		772	const_iv (S_IFBLK)
		773	const_iv (S_IFLNK)
		774	const_iv (S_IFREG)
		775	const_iv (S_IFDIR)
		776	const_iv (S_IFWHT)
		777	const_iv (S_IFSOCK)
		778	const_iv (S_IFMT)
406		779
407	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	780	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
408	croak ("cannot set result pipe to nonblocking mode");	781	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
409	}	782	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		783	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		784	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		785	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
410		786
		787	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		788	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		789	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		790	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		791	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		792
		793	const_iv (ST_RDONLY)
		794	const_iv (ST_NOSUID)
		795	const_iv (ST_NODEV)
		796	const_iv (ST_NOEXEC)
		797	const_iv (ST_SYNCHRONOUS)
		798	const_iv (ST_MANDLOCK)
		799	const_iv (ST_WRITE)
		800	const_iv (ST_APPEND)
		801	const_iv (ST_IMMUTABLE)
		802	const_iv (ST_NOATIME)
		803	const_iv (ST_NODIRATIME)
		804	const_iv (ST_RELATIME)
		805
		806	const_iv (PROT_NONE)
		807	const_iv (PROT_EXEC)
		808	const_iv (PROT_READ)
		809	const_iv (PROT_WRITE)
		810
		811	/*const_iv (MAP_FIXED)*/
		812	const_iv (MAP_PRIVATE)
		813	const_iv (MAP_SHARED)
		814	const_iv (MAP_ANONYMOUS)
		815
		816	/* linuxish */
		817	const_iv (MAP_HUGETLB)
		818	const_iv (MAP_LOCKED)
		819	const_iv (MAP_NORESERVE)
		820	const_iv (MAP_POPULATE)
		821	const_iv (MAP_NONBLOCK)
		822
		823	const_eio (MCL_FUTURE)
		824	const_eio (MCL_CURRENT)
		825
		826	const_eio (MS_ASYNC)
		827	const_eio (MS_INVALIDATE)
		828	const_eio (MS_SYNC)
		829
		830	const_eio (MT_MODIFY)
		831
		832	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		833	const_eio (SYNC_FILE_RANGE_WRITE)
		834	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		835
		836	const_eio (READDIR_DENTS)
		837	const_eio (READDIR_DIRS_FIRST)
		838	const_eio (READDIR_STAT_ORDER)
		839	const_eio (READDIR_FOUND_UNKNOWN)
		840
		841	const_eio (DT_UNKNOWN)
		842	const_eio (DT_FIFO)
		843	const_eio (DT_CHR)
		844	const_eio (DT_DIR)
		845	const_eio (DT_BLK)
		846	const_eio (DT_REG)
		847	const_eio (DT_LNK)
		848	const_eio (DT_SOCK)
		849	const_eio (DT_WHT)
		850	};
		851
		852	aio_stash = gv_stashpv ("IO::AIO" , 1);
		853	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		854	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		855
		856	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		857	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		858
		859	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		860
		861	create_respipe ();
		862
		863	if (eio_init (want_poll, done_poll) < 0)
		864	croak ("IO::AIO: unable to initialise eio library");
		865
		866	/* atfork child called in fifo order, so before eio's handler */
		867	X_THREAD_ATFORK (0, 0, atfork_child);
		868	}
		869
411	void	870	void
412	min_parallel(nthreads)	871	max_poll_reqs (int nreqs)
413	int nthreads
414	PROTOTYPE: $	872	PROTOTYPE: $
415	CODE:	873	CODE:
416	while (nthreads > started)	874	eio_set_max_poll_reqs (nreqs);
417	start_thread ();
418		875
419	void	876	void
420	max_parallel(nthreads)	877	max_poll_time (double nseconds)
421	int nthreads
422	PROTOTYPE: $	878	PROTOTYPE: $
423	CODE:	879	CODE:
		880	eio_set_max_poll_time (nseconds);
		881
		882	void
		883	min_parallel (int nthreads)
		884	PROTOTYPE: $
		885	CODE:
		886	eio_set_min_parallel (nthreads);
		887
		888	void
		889	max_parallel (int nthreads)
		890	PROTOTYPE: $
		891	CODE:
		892	eio_set_max_parallel (nthreads);
		893
		894	void
		895	max_idle (int nthreads)
		896	PROTOTYPE: $
		897	CODE:
		898	eio_set_max_idle (nthreads);
		899
		900	void
		901	max_outstanding (int maxreqs)
		902	PROTOTYPE: $
		903	CODE:
		904	max_outstanding = maxreqs;
		905
		906	void
		907	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		908	PPCODE:
424	{	909	{
425	int cur = started;	910	dREQ;
426	while (cur > nthreads)	911
427	{	912	req->type = EIO_OPEN;
428	end_thread ();	913	req->sv1 = newSVsv (pathname);
429	cur--;	914	req->ptr1 = SvPVbyte_nolen (req->sv1);
		915	req->int1 = flags;
		916	req->int2 = mode;
		917
		918	REQ_SEND;
		919	}
		920
		921	void
		922	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		923	ALIAS:
		924	aio_fsync = EIO_FSYNC
		925	aio_fdatasync = EIO_FDATASYNC
		926	PPCODE:
		927	{
		928	int fd = s_fileno_croak (fh, 0);
		929	dREQ;
		930
		931	req->type = ix;
		932	req->sv1 = newSVsv (fh);
		933	req->int1 = fd;
		934
		935	REQ_SEND (req);
		936	}
		937
		938	void
		939	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		940	PPCODE:
		941	{
		942	int fd = s_fileno_croak (fh, 0);
		943	dREQ;
		944
		945	req->type = EIO_SYNC_FILE_RANGE;
		946	req->sv1 = newSVsv (fh);
		947	req->int1 = fd;
		948	req->offs = offset;
		949	req->size = nbytes;
		950	req->int2 = flags;
		951
		952	REQ_SEND (req);
		953	}
		954
		955	void
		956	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		957	PPCODE:
		958	{
		959	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		960	int fd = s_fileno_croak (fh, 0);
		961	dREQ;
		962
		963	if (close_pipe < 0)
		964	{
		965	int pipefd [2];
		966
		967	if (pipe (pipefd) < 0
		968	|| close (pipefd [1]) < 0
		969	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		970	abort (); /*D*/
		971
		972	close_pipe = pipefd [0];
430	}	973	}
431		974
432	while (started > nthreads)	975	req->type = EIO_DUP2;
		976	req->int1 = close_pipe;
		977	req->sv2 = newSVsv (fh);
		978	req->int2 = fd;
		979
		980	REQ_SEND (req);
		981	}
		982
		983	void
		984	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		985	ALIAS:
		986	aio_read = EIO_READ
		987	aio_write = EIO_WRITE
		988	PPCODE:
		989	{
		990	STRLEN svlen;
		991	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		992	char *svptr = SvPVbyte (data, svlen);
		993	UV len = SvUV (length);
		994
		995	if (dataoffset < 0)
		996	dataoffset += svlen;
		997
		998	if (dataoffset < 0 || dataoffset > svlen)
		999	croak ("dataoffset outside of data scalar");
		1000
		1001	if (ix == EIO_WRITE)
		1002	{
		1003	/* write: check length and adjust. */
		1004	if (!SvOK (length) || len + dataoffset > svlen)
		1005	len = svlen - dataoffset;
		1006	}
		1007	else
		1008	{
		1009	/* read: check type and grow scalar as necessary */
		1010	SvUPGRADE (data, SVt_PV);
		1011	svptr = SvGROW (data, len + dataoffset + 1);
		1012	}
		1013
		1014	{
		1015	dREQ;
		1016
		1017	req->type = ix;
		1018	req->sv1 = newSVsv (fh);
		1019	req->int1 = fd;
		1020	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1021	req->size = len;
		1022	req->sv2 = SvREFCNT_inc (data);
		1023	req->ptr2 = (char *)svptr + dataoffset;
		1024	req->stroffset = dataoffset;
		1025
		1026	if (!SvREADONLY (data))
		1027	{
		1028	SvREADONLY_on (data);
		1029	req->flags |= FLAG_SV2_RO_OFF;
		1030	}
		1031
		1032	REQ_SEND;
		1033	}
		1034	}
		1035
		1036	void
		1037	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1038	PPCODE:
		1039	{
		1040	SV *data;
		1041	dREQ;
		1042
		1043	req->type = EIO_READLINK;
		1044	req->sv1 = newSVsv (path);
		1045	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1046
		1047	REQ_SEND;
		1048	}
		1049
		1050	void
		1051	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1052	PPCODE:
		1053	{
		1054	int ifd = s_fileno_croak (in_fh , 0);
		1055	int ofd = s_fileno_croak (out_fh, 1);
		1056	dREQ;
		1057
		1058	req->type = EIO_SENDFILE;
		1059	req->sv1 = newSVsv (out_fh);
		1060	req->int1 = ofd;
		1061	req->sv2 = newSVsv (in_fh);
		1062	req->int2 = ifd;
		1063	req->offs = in_offset;
		1064	req->size = length;
		1065
		1066	REQ_SEND;
		1067	}
		1068
		1069	void
		1070	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1071	PPCODE:
		1072	{
		1073	int fd = s_fileno_croak (fh, 0);
		1074	dREQ;
		1075
		1076	req->type = EIO_READAHEAD;
		1077	req->sv1 = newSVsv (fh);
		1078	req->int1 = fd;
		1079	req->offs = offset;
		1080	req->size = length;
		1081
		1082	REQ_SEND;
		1083	}
		1084
		1085	void
		1086	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1087	ALIAS:
		1088	aio_stat = EIO_STAT
		1089	aio_lstat = EIO_LSTAT
		1090	aio_statvfs = EIO_STATVFS
		1091	PPCODE:
		1092	{
		1093	dREQ;
		1094
		1095	req->sv1 = newSVsv (fh_or_path);
		1096
		1097	if (SvPOK (req->sv1))
		1098	{
		1099	req->type = ix;
		1100	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1101	}
		1102	else
		1103	{
		1104	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		1105	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1106	}
		1107
		1108	REQ_SEND;
		1109	}
		1110
		1111	UV
		1112	major (UV dev)
		1113	ALIAS:
		1114	minor = 1
		1115	CODE:
		1116	RETVAL = ix ? major (dev) : minor (dev);
		1117	OUTPUT:
		1118	RETVAL
		1119
		1120	UV
		1121	makedev (UV maj, UV min)
		1122	CODE:
		1123	RETVAL = makedev (maj, min);
		1124	OUTPUT:
		1125	RETVAL
		1126
		1127	void
		1128	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1129	PPCODE:
		1130	{
		1131	dREQ;
		1132
		1133	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1134	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1135	req->sv1 = newSVsv (fh_or_path);
		1136
		1137	if (SvPOK (req->sv1))
		1138	{
		1139	req->type = EIO_UTIME;
		1140	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1141	}
		1142	else
		1143	{
		1144	req->type = EIO_FUTIME;
		1145	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1146	}
		1147
		1148	REQ_SEND;
		1149	}
		1150
		1151	void
		1152	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1153	PPCODE:
		1154	{
		1155	dREQ;
		1156
		1157	req->sv1 = newSVsv (fh_or_path);
		1158	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1159
		1160	if (SvPOK (req->sv1))
		1161	{
		1162	req->type = EIO_TRUNCATE;
		1163	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1164	}
		1165	else
		1166	{
		1167	req->type = EIO_FTRUNCATE;
		1168	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1169	}
		1170
		1171	REQ_SEND;
		1172	}
		1173
		1174	void
		1175	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1176	ALIAS:
		1177	aio_chmod = EIO_CHMOD
		1178	aio_mkdir = EIO_MKDIR
		1179	PPCODE:
		1180	{
		1181	dREQ;
		1182
		1183	req->int2 = mode;
		1184	req->sv1 = newSVsv (fh_or_path);
		1185
		1186	if (SvPOK (req->sv1))
		1187	{
		1188	req->type = ix;
		1189	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1190	}
		1191	else
		1192	{
		1193	req->type = EIO_FCHMOD;
		1194	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1195	}
		1196
		1197	REQ_SEND;
		1198	}
		1199
		1200	void
		1201	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1202	PPCODE:
		1203	{
		1204	dREQ;
		1205
		1206	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1207	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1208	req->sv1 = newSVsv (fh_or_path);
		1209
		1210	if (SvPOK (req->sv1))
		1211	{
		1212	req->type = EIO_CHOWN;
		1213	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1214	}
		1215	else
		1216	{
		1217	req->type = EIO_FCHOWN;
		1218	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1219	}
		1220
		1221	REQ_SEND;
		1222	}
		1223
		1224	void
		1225	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1226	PPCODE:
		1227	{
		1228	dREQ;
		1229
		1230	req->type = EIO_READDIR;
		1231	req->sv1 = newSVsv (pathname);
		1232	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1233	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1234
		1235	if (flags & EIO_READDIR_DENTS)
		1236	req->int1 |= EIO_READDIR_CUSTOM2;
		1237
		1238	REQ_SEND;
		1239	}
		1240
		1241	void
		1242	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1243	ALIAS:
		1244	aio_unlink = EIO_UNLINK
		1245	aio_rmdir = EIO_RMDIR
		1246	aio_readdir = EIO_READDIR
		1247	PPCODE:
		1248	{
		1249	dREQ;
		1250
		1251	req->type = ix;
		1252	req->sv1 = newSVsv (pathname);
		1253	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1254
		1255	REQ_SEND;
		1256	}
		1257
		1258	void
		1259	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1260	ALIAS:
		1261	aio_link = EIO_LINK
		1262	aio_symlink = EIO_SYMLINK
		1263	aio_rename = EIO_RENAME
		1264	PPCODE:
		1265	{
		1266	dREQ;
		1267
		1268	req->type = ix;
		1269	req->sv1 = newSVsv (oldpath);
		1270	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1271	req->sv2 = newSVsv (newpath);
		1272	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1273
		1274	REQ_SEND;
		1275	}
		1276
		1277	void
		1278	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1279	PPCODE:
		1280	{
		1281	dREQ;
		1282
		1283	req->type = EIO_MKNOD;
		1284	req->sv1 = newSVsv (pathname);
		1285	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1286	req->int2 = (mode_t)mode;
		1287	req->offs = dev;
		1288
		1289	REQ_SEND;
		1290	}
		1291
		1292	void
		1293	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1294	ALIAS:
		1295	aio_mtouch = EIO_MTOUCH
		1296	aio_msync = EIO_MSYNC
		1297	PPCODE:
		1298	{
		1299	STRLEN svlen;
		1300	char *svptr = SvPVbyte (data, svlen);
		1301	UV len = SvUV (length);
		1302
		1303	if (offset < 0)
		1304	offset += svlen;
		1305
		1306	if (offset < 0 || offset > svlen)
		1307	croak ("offset outside of scalar");
		1308
		1309	if (!SvOK (length) || len + offset > svlen)
		1310	len = svlen - offset;
		1311
		1312	{
		1313	dREQ;
		1314
		1315	req->type = ix;
		1316	req->sv2 = SvREFCNT_inc (data);
		1317	req->ptr2 = (char *)svptr + offset;
		1318	req->size = len;
		1319	req->int1 = flags;
		1320
		1321	REQ_SEND;
		1322	}
		1323	}
		1324
		1325	void
		1326	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1327	PPCODE:
		1328	{
		1329	STRLEN svlen;
		1330	char *svptr = SvPVbyte (data, svlen);
		1331	UV len = SvUV (length);
		1332
		1333	if (offset < 0)
		1334	offset += svlen;
		1335
		1336	if (offset < 0 || offset > svlen)
		1337	croak ("offset outside of scalar");
		1338
		1339	if (!SvOK (length) || len + offset > svlen)
		1340	len = svlen - offset;
		1341
		1342	{
		1343	dREQ;
		1344
		1345	req->type = EIO_MLOCK;
		1346	req->sv2 = SvREFCNT_inc (data);
		1347	req->ptr2 = (char *)svptr + offset;
		1348	req->size = len;
		1349
		1350	REQ_SEND;
		1351	}
		1352	}
		1353
		1354	void
		1355	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1356	PPCODE:
		1357	{
		1358	dREQ;
		1359
		1360	req->type = EIO_MLOCKALL;
		1361	req->int1 = flags;
		1362
		1363	REQ_SEND;
		1364	}
		1365
		1366	void
		1367	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1368	PPCODE:
		1369	{
		1370	dREQ;
		1371
		1372	req->type = EIO_BUSY;
		1373	req->nv1 = delay < 0. ? 0. : delay;
		1374
		1375	REQ_SEND;
		1376	}
		1377
		1378	void
		1379	aio_group (SV *callback=&PL_sv_undef)
		1380	PPCODE:
		1381	{
		1382	dREQ;
		1383
		1384	req->type = EIO_GROUP;
		1385
		1386	req_submit (req);
		1387	XPUSHs (req_sv (req, aio_grp_stash));
		1388	}
		1389
		1390	void
		1391	aio_nop (SV *callback=&PL_sv_undef)
		1392	ALIAS:
		1393	aio_nop = EIO_NOP
		1394	aio_sync = EIO_SYNC
		1395	PPCODE:
		1396	{
		1397	dREQ;
		1398
		1399	req->type = ix;
		1400
		1401	REQ_SEND;
		1402	}
		1403
		1404	int
		1405	aioreq_pri (int pri = 0)
		1406	CODE:
		1407	RETVAL = next_pri;
		1408	if (items > 0)
		1409	{
		1410	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1411	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1412	next_pri = pri;
		1413	}
		1414	OUTPUT:
		1415	RETVAL
		1416
		1417	void
		1418	aioreq_nice (int nice = 0)
		1419	CODE:
		1420	nice = next_pri - nice;
		1421	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1422	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1423	next_pri = nice;
		1424
		1425	void
		1426	flush ()
		1427	CODE:
		1428	while (eio_nreqs ())
433	{	1429	{
434	poll_wait ();	1430	poll_wait ();
435	poll_cb ();	1431	poll_cb ();
436	}	1432	}
437	}
438		1433
439	int	1434	int
440	max_outstanding(nreqs)
441	int nreqs
442	PROTOTYPE: $
443	CODE:
444	RETVAL = max_outstanding;
445	max_outstanding = nreqs;
446
447	void
448	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
449	SV * pathname
450	int flags
451	int mode
452	SV * callback
453	PROTOTYPE: $$$;$
454	CODE:
455	{
456	aio_req req;
457
458	Newz (0, req, 1, aio_cb);
459
460	if (!req)
461	croak ("out of memory during aio_req allocation");
462
463	req->type = REQ_OPEN;
464	req->data = newSVsv (pathname);
465	req->dataptr = SvPV_nolen (req->data);
466	req->fd = flags;
467	req->mode = mode;
468	req->callback = SvREFCNT_inc (callback);
469
470	send_req (req);
471	}
472
473	void
474	aio_close(fh,callback=&PL_sv_undef)
475	SV * fh
476	SV * callback
477	PROTOTYPE: $;$
478	ALIAS:
479	aio_close = REQ_CLOSE
480	aio_fsync = REQ_FSYNC
481	aio_fdatasync = REQ_FDATASYNC
482	CODE:
483	{
484	aio_req req;
485
486	Newz (0, req, 1, aio_cb);
487
488	if (!req)
489	croak ("out of memory during aio_req allocation");
490
491	req->type = ix;
492	req->fh = newSVsv (fh);
493	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
494	req->callback = SvREFCNT_inc (callback);
495
496	send_req (req);
497	}
498
499	void
500	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
501	SV * fh
502	UV offset
503	IV length
504	SV * data
505	IV dataoffset
506	SV * callback
507	ALIAS:
508	aio_read = REQ_READ
509	aio_write = REQ_WRITE
510	PROTOTYPE: $$$$$;$
511	CODE:
512	{
513	aio_req req;
514	STRLEN svlen;
515	char *svptr = SvPV (data, svlen);
516
517	SvUPGRADE (data, SVt_PV);
518	SvPOK_on (data);
519
520	if (dataoffset < 0)
521	dataoffset += svlen;
522
523	if (dataoffset < 0 || dataoffset > svlen)
524	croak ("data offset outside of string");
525
526	if (ix == REQ_WRITE)
527	{
528	/* write: check length and adjust. */
529	if (length < 0 || length + dataoffset > svlen)
530	length = svlen - dataoffset;
531	}
532	else
533	{
534	/* read: grow scalar as necessary */
535	svptr = SvGROW (data, length + dataoffset);
536	}
537
538	if (length < 0)
539	croak ("length must not be negative");
540
541	Newz (0, req, 1, aio_cb);
542
543	if (!req)
544	croak ("out of memory during aio_req allocation");
545
546	req->type = ix;
547	req->fh = newSVsv (fh);
548	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
549	: IoOFP (sv_2io (fh)));
550	req->offset = offset;
551	req->length = length;
552	req->data = SvREFCNT_inc (data);
553	req->dataptr = (char *)svptr + dataoffset;
554	req->callback = SvREFCNT_inc (callback);
555
556	send_req (req);
557	}
558
559	void
560	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
561	SV * fh
562	UV offset
563	IV length
564	SV * callback
565	PROTOTYPE: $$$;$
566	CODE:
567	{
568	aio_req req;
569
570	if (length < 0)
571	croak ("length must not be negative");
572
573	Newz (0, req, 1, aio_cb);
574
575	if (!req)
576	croak ("out of memory during aio_req allocation");
577
578	req->type = REQ_READAHEAD;
579	req->fh = newSVsv (fh);
580	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
581	req->offset = offset;
582	req->length = length;
583	req->callback = SvREFCNT_inc (callback);
584
585	send_req (req);
586	}
587
588	void
589	aio_stat(fh_or_path,callback=&PL_sv_undef)
590	SV * fh_or_path
591	SV * callback
592	ALIAS:
593	aio_stat = REQ_STAT
594	aio_lstat = REQ_LSTAT
595	CODE:
596	{
597	aio_req req;
598
599	Newz (0, req, 1, aio_cb);
600
601	if (!req)
602	croak ("out of memory during aio_req allocation");
603
604	New (0, req->statdata, 1, Stat_t);
605
606	if (!req->statdata)
607	croak ("out of memory during aio_req->statdata allocation");
608
609	if (SvPOK (fh_or_path))
610	{
611	req->type = ix;
612	req->data = newSVsv (fh_or_path);
613	req->dataptr = SvPV_nolen (req->data);
614	}
615	else
616	{
617	req->type = REQ_FSTAT;
618	req->fh = newSVsv (fh_or_path);
619	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
620	}
621
622	req->callback = SvREFCNT_inc (callback);
623
624	send_req (req);
625	}
626
627	void
628	aio_unlink(pathname,callback=&PL_sv_undef)
629	SV * pathname
630	SV * callback
631	CODE:
632	{
633	aio_req req;
634
635	Newz (0, req, 1, aio_cb);
636
637	if (!req)
638	croak ("out of memory during aio_req allocation");
639
640	req->type = REQ_UNLINK;
641	req->data = newSVsv (pathname);
642	req->dataptr = SvPV_nolen (req->data);
643	req->callback = SvREFCNT_inc (callback);
644
645	send_req (req);
646	}
647
648	void
649	flush()
650	PROTOTYPE:
651	CODE:
652	while (nreqs)
653	{
654	poll_wait ();
655	poll_cb ();
656	}
657
658	void
659	poll()	1435	poll ()
660	PROTOTYPE:
661	CODE:	1436	CODE:
662	if (nreqs)
663	{
664	poll_wait ();	1437	poll_wait ();
665	poll_cb ();
666	}
667
668	int
669	poll_fileno()
670	PROTOTYPE:
671	CODE:
672	RETVAL = respipe [0];
673	OUTPUT:
674	RETVAL
675
676	int
677	poll_cb(...)
678	PROTOTYPE:
679	CODE:
680	RETVAL = poll_cb ();	1438	RETVAL = poll_cb ();
681	OUTPUT:	1439	OUTPUT:
682	RETVAL	1440	RETVAL
683		1441
684	void
685	poll_wait()
686	PROTOTYPE:
687	CODE:
688	if (nreqs)
689	poll_wait ();
690
691	int	1442	int
692	nreqs()	1443	poll_fileno ()
693	PROTOTYPE:
694	CODE:	1444	CODE:
695	RETVAL = nreqs;	1445	RETVAL = s_epipe_fd (&respipe);
696	OUTPUT:	1446	OUTPUT:
697	RETVAL	1447	RETVAL
698		1448
		1449	int
		1450	poll_cb (...)
		1451	PROTOTYPE:
		1452	CODE:
		1453	RETVAL = poll_cb ();
		1454	OUTPUT:
		1455	RETVAL
		1456
		1457	void
		1458	poll_wait ()
		1459	CODE:
		1460	poll_wait ();
		1461
		1462	int
		1463	nreqs ()
		1464	CODE:
		1465	RETVAL = eio_nreqs ();
		1466	OUTPUT:
		1467	RETVAL
		1468
		1469	int
		1470	nready ()
		1471	CODE:
		1472	RETVAL = eio_nready ();
		1473	OUTPUT:
		1474	RETVAL
		1475
		1476	int
		1477	npending ()
		1478	CODE:
		1479	RETVAL = eio_npending ();
		1480	OUTPUT:
		1481	RETVAL
		1482
		1483	int
		1484	nthreads ()
		1485	CODE:
		1486	RETVAL = eio_nthreads ();
		1487	OUTPUT:
		1488	RETVAL
		1489
		1490	int
		1491	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1492	CODE:
		1493	RETVAL = posix_fadvise (fh, offset, length, advice);
		1494	OUTPUT:
		1495	RETVAL
		1496
		1497	ssize_t
		1498	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1499	CODE:
		1500	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1501	OUTPUT:
		1502	RETVAL
		1503
		1504	void
		1505	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1506	PPCODE:
		1507	sv_unmagic (scalar, MMAP_MAGIC);
		1508	{
		1509	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1510	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1511	if (addr == (void *)-1)
		1512	XSRETURN_NO;
		1513
		1514	sv_force_normal (scalar);
		1515
		1516	/* we store the length in mg_obj, as namlen is I32 :/ */
		1517	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1518	->mg_obj = (SV *)length;
		1519
		1520	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1521
		1522	if (!(prot & PROT_WRITE))
		1523	SvREADONLY_on (scalar);
		1524
		1525	if (SvLEN (scalar))
		1526	Safefree (SvPVX (scalar));
		1527
		1528	SvPVX (scalar) = (char *)addr;
		1529	SvCUR_set (scalar, length);
		1530	SvLEN_set (scalar, 0);
		1531	SvPOK_only (scalar);
		1532
		1533	XSRETURN_YES;
		1534	}
		1535
		1536	void
		1537	munmap (SV *scalar)
		1538	CODE:
		1539	sv_unmagic (scalar, MMAP_MAGIC);
		1540
		1541	int
		1542	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1543	ALIAS:
		1544	mprotect = 1
		1545	CODE:
		1546	{
		1547	STRLEN svlen;
		1548	void *addr = SvPVbyte (scalar, svlen);
		1549	size_t len = SvUV (length);
		1550
		1551	if (offset < 0)
		1552	offset += svlen;
		1553
		1554	if (offset < 0 || offset > svlen)
		1555	croak ("offset outside of scalar");
		1556
		1557	if (!SvOK (length) || len + offset > svlen)
		1558	len = svlen - offset;
		1559
		1560	addr = (void *)(((intptr_t)addr) + offset);
		1561	eio_page_align (&addr, &len);
		1562
		1563	switch (ix)
		1564	{
		1565	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1566	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1567	}
		1568	}
		1569	OUTPUT:
		1570	RETVAL
		1571
		1572	int
		1573	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1574	CODE:
		1575	{
		1576	STRLEN svlen;
		1577	void *addr = SvPVbyte (scalar, svlen);
		1578	size_t len = SvUV (length);
		1579
		1580	if (offset < 0)
		1581	offset += svlen;
		1582
		1583	if (offset < 0 || offset > svlen)
		1584	croak ("offset outside of scalar");
		1585
		1586	if (!SvOK (length) || len + offset > svlen)
		1587	len = svlen - offset;
		1588
		1589	addr = (void *)(((intptr_t)addr) + offset);
		1590	eio_page_align (&addr, &len);
		1591	#if _POSIX_MEMLOCK_RANGE
		1592	RETVAL = munlock (addr, len);
		1593	#else
		1594	RETVAL = ((errno = ENOSYS), -1);
		1595	#endif
		1596	}
		1597	OUTPUT:
		1598	RETVAL
		1599
		1600	int
		1601	munlockall ()
		1602	CODE:
		1603	#if _POSIX_MEMLOCK
		1604	munlockall ();
		1605	#else
		1606	RETVAL = -1;
		1607	errno = ENOSYS;
		1608	#endif
		1609	OUTPUT:
		1610	RETVAL
		1611
		1612	void _on_next_submit (SV *cb)
		1613	CODE:
		1614	SvREFCNT_dec (on_next_submit);
		1615	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1616
		1617	PROTOTYPES: DISABLE
		1618
		1619	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1620
		1621	void
		1622	cancel (aio_req_ornot req)
		1623	CODE:
		1624	eio_cancel (req);
		1625
		1626	void
		1627	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1628	PPCODE:
		1629	{
		1630	if (GIMME_V != G_VOID)
		1631	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1632
		1633	if (items > 1)
		1634	{
		1635	SV *cb_cv =get_cb (callback);
		1636
		1637	SvREFCNT_dec (req->callback);
		1638	req->callback = SvREFCNT_inc (cb_cv);
		1639	}
		1640	}
		1641
		1642	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1643
		1644	void
		1645	add (aio_req grp, ...)
		1646	PPCODE:
		1647	{
		1648	int i;
		1649
		1650	if (grp->int1 == 2)
		1651	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1652
		1653	for (i = 1; i < items; ++i )
		1654	{
		1655	aio_req req;
		1656
		1657	if (GIMME_V != G_VOID)
		1658	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1659
		1660	req = SvAIO_REQ (ST (i));
		1661
		1662	if (req)
		1663	eio_grp_add (grp, req);
		1664	}
		1665	}
		1666
		1667	void
		1668	cancel_subs (aio_req_ornot req)
		1669	CODE:
		1670	req_cancel_subs (req);
		1671
		1672	void
		1673	result (aio_req grp, ...)
		1674	CODE:
		1675	{
		1676	int i;
		1677	AV *av;
		1678
		1679	grp->errorno = errno;
		1680
		1681	av = newAV ();
		1682	av_extend (av, items - 1);
		1683
		1684	for (i = 1; i < items; ++i )
		1685	av_push (av, newSVsv (ST (i)));
		1686
		1687	SvREFCNT_dec (grp->sv1);
		1688	grp->sv1 = (SV *)av;
		1689	}
		1690
		1691	void
		1692	errno (aio_req grp, int errorno = errno)
		1693	CODE:
		1694	grp->errorno = errorno;
		1695
		1696	void
		1697	limit (aio_req grp, int limit)
		1698	CODE:
		1699	eio_grp_limit (grp, limit);
		1700
		1701	void
		1702	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1703	CODE:
		1704	{
		1705	SvREFCNT_dec (grp->sv2);
		1706	grp->sv2 = newSVsv (callback);
		1707	grp->feed = aio_grp_feed;
		1708
		1709	if (grp->int2 <= 0)
		1710	grp->int2 = 2;
		1711
		1712	eio_grp_limit (grp, grp->int2);
		1713	}
		1714

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