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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.14 by root, Sat Jul 23 18:15:36 2005 UTC vs.
Revision 1.188 by root, Sun Jul 17 04:20:04 2011 UTC

		1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
		4
		5	#include "EXTERN.h"
1	#include "perl.h"	6	#include "perl.h"
2	#include "XSUB.h"	7	#include "XSUB.h"
3		8
		9	#include "schmorp.h"
		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
4	#include <sys/types.h>	14	#include <sys/types.h>
5	#include <sys/stat.h>	15	#include <sys/stat.h>
6
7	#include <unistd.h>	16	#include <limits.h>
8	#include <fcntl.h>	17	#include <fcntl.h>
9	#include <signal.h>
10	#include <sched.h>	18	#include <sched.h>
11	#if __linux	19
		20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
12	#include <sys/syscall.h>	21	# include <sys/mman.h>
13	#endif	22	#endif
14		23
15	#include <pthread.h>	24	/* perl namespace pollution */
		25	#undef VERSION
16		26
17	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	27	/* perl stupidly overrides readdir and maybe others */
18	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	28	/* with thread-unsafe versions, imagine that :( */
19	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	29	#undef readdir
		30	#undef opendir
		31	#undef closedir
20		32
21	#if __ia64	33	#ifdef _WIN32
22	# define STACKSIZE 65536	34
		35	#define EIO_STRUCT_DIRENT Direntry_t
		36	#undef malloc
		37	#undef free
		38
		39	// perl overrides all those nice libc functions
		40	#undef open
		41	#undef read
		42	#undef write
		43	#undef send
		44	#undef recv
		45	#undef stat
		46	#undef lstat
		47	#undef fstat
		48	#undef truncate
		49	#undef ftruncate
		50	#undef open
		51	#undef link
		52	#undef close
		53	#undef unlink
		54	#undef mkdir
		55	#undef rmdir
		56	#undef rename
		57	#undef lseek
		58	#undef opendir
		59	#undef readdir
		60	#undef closedir
		61	#undef chmod
		62	#undef fchmod
		63	#undef dup
		64	#undef dup2
		65	#undef abort
		66	#undef pipe
		67
23	#else	68	#else
24	# define STACKSIZE 4096	69
		70	#include <sys/time.h>
		71	#include <sys/select.h>
		72	#include <unistd.h>
		73	#include <utime.h>
		74	#include <signal.h>
		75
		76	#endif
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
		89	#endif
		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/config.h"
		119	#include "libeio/eio.h"
		120
		121	static int req_invoke (eio_req *req);
		122	#define EIO_FINISH(req) req_invoke (req)
		123	static void req_destroy (eio_req *grp);
		124	#define EIO_DESTROY(req) req_destroy (req)
		125
		126	#include "libeio/eio.c"
		127
		128	/* Linux/others */
		129	#ifndef O_ASYNC
		130	# define O_ASYNC 0
		131	#endif
		132	#ifndef O_DIRECT
		133	# define O_DIRECT 0
		134	#endif
		135	#ifndef O_NOATIME
		136	# define O_NOATIME 0
		137	#endif
		138
		139	/* POSIX */
		140	#ifndef O_CLOEXEC
		141	# define O_CLOEXEC 0
		142	#endif
		143	#ifndef O_NOFOLLOW
		144	# define O_NOFOLLOW 0
		145	#endif
		146	#ifndef O_NOCTTY
		147	# define O_NOCTTY 0
		148	#endif
		149	#ifndef O_NONBLOCK
		150	# define O_NONBLOCK 0
		151	#endif
		152	#ifndef O_EXEC
		153	# define O_EXEC 0
		154	#endif
		155	#ifndef O_SEARCH
		156	# define O_SEARCH 0
		157	#endif
		158	#ifndef O_DIRECTORY
		159	# define O_DIRECTORY 0
		160	#endif
		161	#ifndef O_DSYNC
		162	# define O_DSYNC 0
		163	#endif
		164	#ifndef O_RSYNC
		165	# define O_RSYNC 0
		166	#endif
		167	#ifndef O_SYNC
		168	# define O_SYNC 0
		169	#endif
		170	#ifndef O_TTY_INIT
		171	# define O_TTY_INIT 0
		172	#endif
		173
		174	#ifndef POSIX_FADV_NORMAL
		175	# define POSIX_FADV_NORMAL 0
		176	#endif
		177	#ifndef POSIX_FADV_SEQUENTIAL
		178	# define POSIX_FADV_SEQUENTIAL 0
		179	#endif
		180	#ifndef POSIX_FADV_RANDOM
		181	# define POSIX_FADV_RANDOM 0
		182	#endif
		183	#ifndef POSIX_FADV_NOREUSE
		184	# define POSIX_FADV_NOREUSE 0
		185	#endif
		186	#ifndef POSIX_FADV_WILLNEED
		187	# define POSIX_FADV_WILLNEED 0
		188	#endif
		189	#ifndef POSIX_FADV_DONTNEED
		190	# define POSIX_FADV_DONTNEED 0
		191	#endif
		192
		193	#if !HAVE_POSIX_FADVISE
		194	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		195	#endif
		196
		197	#ifndef POSIX_MADV_NORMAL
		198	# define POSIX_MADV_NORMAL 0
		199	#endif
		200	#ifndef POSIX_MADV_SEQUENTIAL
		201	# define POSIX_MADV_SEQUENTIAL 0
		202	#endif
		203	#ifndef POSIX_MADV_RANDOM
		204	# define POSIX_MADV_RANDOM 0
		205	#endif
		206	#ifndef POSIX_MADV_WILLNEED
		207	# define POSIX_MADV_WILLNEED 0
		208	#endif
		209	#ifndef POSIX_MADV_DONTNEED
		210	# define POSIX_MADV_DONTNEED 0
		211	#endif
		212
		213	#if !HAVE_POSIX_MADVISE
		214	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		215	#endif
		216
		217	#ifndef PROT_NONE
		218	# define PROT_NONE 0
		219	#endif
		220	#ifndef PROT_READ
		221	# define PROT_READ 0
		222	#endif
		223	#ifndef PROT_WRITE
		224	# define PROT_READ 0
		225	#endif
		226	#ifndef PROT_EXEC
		227	# define PROT_EXEC 0
		228	#endif
		229
		230	#ifndef ST_RDONLY
		231	# define ST_RDONLY 0
		232	#endif
		233	#ifndef ST_NOSUID
		234	# define ST_NOSUID 0
		235	#endif
		236	#ifndef ST_NODEV
		237	# define ST_NODEV 0
		238	#endif
		239	#ifndef ST_NOEXEC
		240	# define ST_NOEXEC 0
		241	#endif
		242	#ifndef ST_SYNCHRONOUS
		243	# define ST_SYNCHRONOUS 0
		244	#endif
		245	#ifndef ST_MANDLOCK
		246	# define ST_MANDLOCK 0
		247	#endif
		248	#ifndef ST_WRITE
		249	# define ST_WRITE 0
		250	#endif
		251	#ifndef ST_APPEND
		252	# define ST_APPEND 0
		253	#endif
		254	#ifndef ST_IMMUTABLE
		255	# define ST_IMMUTABLE 0
		256	#endif
		257	#ifndef ST_NOATIME
		258	# define ST_NOATIME 0
		259	#endif
		260	#ifndef ST_NODIRATIME
		261	# define ST_NODIRATIME 0
		262	#endif
		263	#ifndef ST_RELATIME
		264	# define ST_RELATIME 0
		265	#endif
		266
		267	#ifndef S_IFIFO
		268	# define S_IFIFO 0
		269	#endif
		270	#ifndef S_IFCHR
		271	# define S_IFCHR 0
		272	#endif
		273	#ifndef S_IFBLK
		274	# define S_IFBLK 0
		275	#endif
		276	#ifndef S_IFLNK
		277	# define S_IFLNK 0
		278	#endif
		279	#ifndef S_IFREG
		280	# define S_IFREG 0
		281	#endif
		282	#ifndef S_IFDIR
		283	# define S_IFDIR 0
		284	#endif
		285	#ifndef S_IFWHT
		286	# define S_IFWHT 0
		287	#endif
		288	#ifndef S_IFSOCK
		289	# define S_IFSOCK 0
		290	#endif
		291
		292	#ifndef MAP_ANONYMOUS
		293	# ifdef MAP_ANON
		294	# define MAP_ANONYMOUS MAP_ANON
		295	# else
		296	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
		297	# endif
		298	#endif
		299	#ifndef MAP_HUGETLB
		300	# define MAP_HUGETLB 0
		301	#endif
		302	#ifndef MAP_LOCKED
		303	# define MAP_LOCKED 0
		304	#endif
		305	#ifndef MAP_NORESERVE
		306	# define MAP_NORESERVE 0
		307	#endif
		308	#ifndef MAP_POPULATE
		309	# define MAP_POPULATE 0
		310	#endif
		311	#ifndef MAP_NONBLOCK
		312	# define MAP_NONBLOCK 0
		313	#endif
		314
		315	#ifndef makedev
		316	# define makedev(maj,min) (((maj) << 8) | (min))
		317	#endif
		318	#ifndef major
		319	# define major(dev) ((dev) >> 8)
		320	#endif
		321	#ifndef minor
		322	# define minor(dev) ((dev) & 0xff)
		323	#endif
		324
		325	#ifndef PAGESIZE
		326	# define PAGESIZE sysconf (_SC_PAGESIZE)
25	#endif	327	#endif
26		328
27	enum {	329	enum {
28	REQ_QUIT,	330	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
29	REQ_OPEN, REQ_CLOSE,
30	REQ_READ, REQ_WRITE, REQ_READAHEAD,
31	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
32	REQ_FSYNC, REQ_FDATASYNC,
33	};	331	};
34		332
35	typedef struct aio_cb {
36	struct aio_cb *volatile next;
37
38	int type;
39
40	int fd;
41	off_t offset;
42	size_t length;
43	ssize_t result;
44	mode_t mode; /* open */
45	int errorno;
46	SV *data, *callback, *fh;
47	void *dataptr;
48	STRLEN dataoffset;
49
50	Stat_t *statdata;
51	} aio_cb;
52
53	typedef aio_cb *aio_req;	333	typedef eio_req *aio_req;
		334	typedef eio_req *aio_req_ornot;
54		335
55	static int started;	336	static SV *on_next_submit;
56	static volatile int nreqs;	337	static int next_pri = EIO_PRI_DEFAULT;
57	static int max_outstanding = 1<<30;	338	static int max_outstanding;
58	static int respipe [2];
59		339
60	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	340	static s_epipe respipe;
61	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
62	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
63		341
64	static volatile aio_req reqs, reqe; /* queue start, queue end */	342	static void req_destroy (aio_req req);
65	static volatile aio_req ress, rese; /* queue start, queue end */	343	static void req_cancel (aio_req req);
66		344
67	static void	345	static void want_poll (void)
68	poll_wait ()
69	{	346	{
70	if (nreqs && !ress)	347	/* write a dummy byte to the pipe so fh becomes ready */
		348	s_epipe_signal (&respipe);
		349	}
		350
		351	static void done_poll (void)
		352	{
		353	/* read any signals sent by the worker threads */
		354	s_epipe_drain (&respipe);
		355	}
		356
		357	/* must be called at most once */
		358	static SV *req_sv (aio_req req, HV *stash)
		359	{
		360	if (!req->self)
71	{	361	{
72	fd_set rfd;	362	req->self = (SV *)newHV ();
73	FD_ZERO(&rfd);	363	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
74	FD_SET(respipe [0], &rfd);
75
76	select (respipe [0] + 1, &rfd, 0, 0, 0);
77	}	364	}
78	}
79		365
80	static int	366	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
81	poll_cb ()	367	}
82	{
83	dSP;
84	int count = 0;
85	aio_req req, prv;
86		368
87	pthread_mutex_lock (&reslock);	369	static aio_req SvAIO_REQ (SV *sv)
		370	{
		371	MAGIC *mg;
88		372
89	{	373	if (!SvROK (sv)
90	/* read any signals sent by the worker threads */	374	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
91	char buf [32];	375	&& SvSTASH (SvRV (sv)) != aio_req_stash
92	while (read (respipe [0], buf, 32) > 0)	376	&& !sv_derived_from (sv, "IO::AIO::REQ")))
93	;	377	croak ("object of class IO::AIO::REQ expected");
94	}
95		378
96	req = ress;	379	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
97	ress = rese = 0;
98		380
99	pthread_mutex_unlock (&reslock);	381	return mg ? (aio_req)mg->mg_ptr : 0;
		382	}
100		383
101	while (req)	384	static void aio_grp_feed (aio_req grp)
		385	{
		386	if (grp->sv2 && SvOK (grp->sv2))
102	{	387	{
103	nreqs--;	388	dSP;
104		389
105	if (req->type == REQ_QUIT)	390	ENTER;
106	started--;	391	SAVETMPS;
107	else	392	PUSHMARK (SP);
		393	XPUSHs (req_sv (grp, aio_grp_stash));
		394	PUTBACK;
		395	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		396	SPAGAIN;
		397	FREETMPS;
		398	LEAVE;
		399	}
		400	}
		401
		402	static void req_submit (eio_req *req)
		403	{
		404	eio_submit (req);
		405
		406	if (expect_false (on_next_submit))
		407	{
		408	dSP;
		409	SV *cb = sv_2mortal (on_next_submit);
		410
		411	on_next_submit = 0;
		412
		413	PUSHMARK (SP);
		414	PUTBACK;
		415	call_sv (cb, G_DISCARD | G_EVAL);
		416	}
		417	}
		418
		419	static int req_invoke (eio_req *req)
		420	{
		421	if (req->flags & FLAG_SV2_RO_OFF)
		422	SvREADONLY_off (req->sv2);
		423
		424	if (!EIO_CANCELLED (req) && req->callback)
		425	{
		426	dSP;
		427	static SV *sv_result_cache; /* caches the result integer SV */
		428	SV *sv_result;
		429
		430	ENTER;
		431	SAVETMPS;
		432	PUSHMARK (SP);
		433	EXTEND (SP, 1);
		434
		435	/* do not recreate the result IV from scratch each time */
		436	if (expect_true (sv_result_cache))
108	{	437	{
109	int errorno = errno;	438	sv_result = sv_result_cache; sv_result_cache = 0;
110	errno = req->errorno;	439	SvIV_set (sv_result, req->result);
111		440	SvIOK_only (sv_result);
112	if (req->type == REQ_READ)
113	SvCUR_set (req->data, req->dataoffset
114	+ req->result > 0 ? req->result : 0);
115
116	if (req->data)
117	SvREFCNT_dec (req->data);
118
119	if (req->fh)
120	SvREFCNT_dec (req->fh);
121
122	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
123	{
124	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
125	PL_laststatval = req->result;
126	PL_statcache = *(req->statdata);
127
128	Safefree (req->statdata);
129	}
130
131	ENTER;
132	PUSHMARK (SP);
133	XPUSHs (sv_2mortal (newSViv (req->result)));
134
135	if (req->type == REQ_OPEN)
136	{
137	/* convert fd to fh */
138	SV *fh;
139
140	PUTBACK;
141	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
142	SPAGAIN;
143
144	fh = SvREFCNT_inc (POPs);
145
146	PUSHMARK (SP);
147	XPUSHs (sv_2mortal (fh));
148	}
149
150	if (SvOK (req->callback))
151	{
152	PUTBACK;
153	call_sv (req->callback, G_VOID | G_EVAL);
154	SPAGAIN;
155	}
156
157	LEAVE;
158
159	if (req->callback)
160	SvREFCNT_dec (req->callback);
161
162	errno = errorno;
163	count++;
164	}
165
166	prv = req;
167	req = req->next;
168	Safefree (prv);
169
170	/* TODO: croak on errors? */
171	}
172
173	return count;
174	}
175
176	static void *aio_proc(void *arg);
177
178	static void
179	start_thread (void)
180	{
181	sigset_t fullsigset, oldsigset;
182	pthread_t tid;
183	pthread_attr_t attr;
184
185	pthread_attr_init (&attr);
186	pthread_attr_setstacksize (&attr, STACKSIZE);
187	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
188
189	sigfillset (&fullsigset);
190	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
191
192	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
193	started++;
194
195	sigprocmask (SIG_SETMASK, &oldsigset, 0);
196	}
197
198	static void
199	send_req (aio_req req)
200	{
201	nreqs++;
202
203	pthread_mutex_lock (&reqlock);
204
205	req->next = 0;
206
207	if (reqe)
208	{
209	reqe->next = req;
210	reqe = req;
211	}
212	else
213	reqe = reqs = req;
214
215	pthread_cond_signal (&reqwait);
216	pthread_mutex_unlock (&reqlock);
217
218	while (nreqs > max_outstanding)
219	{
220	poll_wait ();
221	poll_cb ();
222	}
223	}
224
225	static void
226	end_thread (void)
227	{
228	aio_req req;
229	New (0, req, 1, aio_cb);
230	req->type = REQ_QUIT;
231
232	send_req (req);
233	}
234
235	static void *
236	aio_proc (void *thr_arg)
237	{
238	aio_req req;
239	int type;
240
241	do
242	{
243	pthread_mutex_lock (&reqlock);
244
245	for (;;)
246	{
247	req = reqs;
248
249	if (reqs)
250	{
251	reqs = reqs->next;
252	if (!reqs) reqe = 0;
253	}
254
255	if (req)
256	break;
257
258	pthread_cond_wait (&reqwait, &reqlock);
259	}
260
261	pthread_mutex_unlock (&reqlock);
262
263	errno = 0; /* strictly unnecessary */
264
265	type = req->type;
266
267	switch (type)
268	{
269	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
270	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
271	#if SYS_readahead
272	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
273	#else
274	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
275	#endif
276
277	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
278	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
279	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
280
281	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
282	case REQ_CLOSE: req->result = close (req->fd); break;
283	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
284
285	case REQ_FSYNC: req->result = fsync (req->fd); break;
286	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
287
288	case REQ_QUIT:
289	break;
290
291	default:
292	req->result = ENOSYS;
293	break;
294	}
295
296	req->errorno = errno;
297
298	pthread_mutex_lock (&reslock);
299
300	req->next = 0;
301
302	if (rese)
303	{
304	rese->next = req;
305	rese = req;
306	}	441	}
307	else	442	else
308	{	443	{
309	rese = ress = req;	444	sv_result = newSViv (req->result);
310		445	SvREADONLY_on (sv_result);
311	/* write a dummy byte to the pipe so fh becomes ready */
312	write (respipe [1], &respipe, 1);
313	}	446	}
314		447
315	pthread_mutex_unlock (&reslock);	448	switch (req->type)
		449	{
		450	case EIO_READDIR:
		451	{
		452	SV *rv = &PL_sv_undef;
		453
		454	if (req->result >= 0)
		455	{
		456	int i;
		457	char *names = (char *)req->ptr2;
		458	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		459	AV *av = newAV ();
		460
		461	av_extend (av, req->result - 1);
		462
		463	for (i = 0; i < req->result; ++i)
		464	{
		465	if (req->int1 & EIO_READDIR_DENTS)
		466	{
		467	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		468
		469	if (req->int1 & EIO_READDIR_CUSTOM2)
		470	{
		471	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		472	AV *avent = newAV ();
		473
		474	av_extend (avent, 2);
		475
		476	if (!sv_type [ent->type])
		477	{
		478	sv_type [ent->type] = newSViv (ent->type);
		479	SvREADONLY_on (sv_type [ent->type]);
		480	}
		481
		482	av_store (avent, 0, namesv);
		483	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		484	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		485
		486	av_store (av, i, newRV_noinc ((SV *)avent));
		487	}
		488	else
		489	av_store (av, i, namesv);
		490
		491	++ent;
		492	}
		493	else
		494	{
		495	SV *name = newSVpv (names, 0);
		496	av_store (av, i, name);
		497	names += SvCUR (name) + 1;
		498	}
		499	}
		500
		501	rv = sv_2mortal (newRV_noinc ((SV *)av));
		502	}
		503
		504	PUSHs (rv);
		505
		506	if (req->int1 & EIO_READDIR_CUSTOM1)
		507	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		508	}
		509	break;
		510
		511	case EIO_OPEN:
		512	{
		513	/* convert fd to fh */
		514	SV *fh = &PL_sv_undef;
		515
		516	if (req->result >= 0)
		517	{
		518	GV *gv = (GV *)sv_newmortal ();
		519	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		520	char sym [64];
		521	int symlen;
		522
		523	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		524	gv_init (gv, aio_stash, sym, symlen, 0);
		525
		526	symlen = snprintf (
		527	sym,
		528	sizeof (sym),
		529	"%s&=%d",
		530	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		531	(int)req->result
		532	);
		533
		534	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		535	fh = (SV *)gv;
		536	}
		537
		538	PUSHs (fh);
		539	}
		540	break;
		541
		542	case EIO_STATVFS:
		543	case EIO_FSTATVFS:
		544	{
		545	SV *rv = &PL_sv_undef;
		546
		547	#ifndef _WIN32
		548	if (req->result >= 0)
		549	{
		550	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		551	HV *hv = newHV ();
		552
		553	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		554
		555	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		556	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		557	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		558	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		559	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		560	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		561	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		562	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		563	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		564	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		565	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		566	}
		567	#endif
		568
		569	PUSHs (rv);
		570	}
		571
		572	break;
		573
		574	case EIO_GROUP:
		575	req->int1 = 2; /* mark group as finished */
		576
		577	if (req->sv1)
		578	{
		579	int i;
		580	AV *av = (AV *)req->sv1;
		581
		582	EXTEND (SP, AvFILL (av) + 1);
		583	for (i = 0; i <= AvFILL (av); ++i)
		584	PUSHs (*av_fetch (av, i, 0));
		585	}
		586	break;
		587
		588	case EIO_NOP:
		589	case EIO_BUSY:
		590	break;
		591
		592	case EIO_READLINK:
		593	case EIO_REALPATH:
		594	if (req->result > 0)
		595	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		596	break;
		597
		598	case EIO_STAT:
		599	case EIO_LSTAT:
		600	case EIO_FSTAT:
		601	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		602	PL_laststatval = req->result;
		603	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		604	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		605	PUSHs (sv_result);
		606	break;
		607
		608	case EIO_READ:
		609	{
		610	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		611	*SvEND (req->sv2) = 0;
		612	SvPOK_only (req->sv2);
		613	SvSETMAGIC (req->sv2);
		614	PUSHs (sv_result);
		615	}
		616	break;
		617
		618	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		619	if (req->result > 0)
		620	SvIV_set (sv_result, 0);
		621	/* FALLTHROUGH */
		622
		623	default:
		624	PUSHs (sv_result);
		625	break;
		626	}
		627
		628	errno = req->errorno;
		629
		630	PUTBACK;
		631	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		632	SPAGAIN;
		633
		634	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		635	SvREFCNT_dec (sv_result);
		636	else
		637	sv_result_cache = sv_result;
		638
		639	FREETMPS;
		640	LEAVE;
		641
		642	PUTBACK;
316	}	643	}
317	while (type != REQ_QUIT);	644
		645	return !!SvTRUE (ERRSV);
		646	}
		647
		648	static void req_destroy (aio_req req)
		649	{
		650	if (req->self)
		651	{
		652	sv_unmagic (req->self, PERL_MAGIC_ext);
		653	SvREFCNT_dec (req->self);
		654	}
		655
		656	SvREFCNT_dec (req->sv1);
		657	SvREFCNT_dec (req->sv2);
		658	SvREFCNT_dec (req->callback);
		659
		660	Safefree (req);
		661	}
		662
		663	static void req_cancel_subs (aio_req grp)
		664	{
		665	if (grp->type != EIO_GROUP)
		666	return;
		667
		668	SvREFCNT_dec (grp->sv2);
		669	grp->sv2 = 0;
		670
		671	eio_grp_cancel (grp);
		672	}
		673
		674	static void create_respipe (void)
		675	{
		676	if (s_epipe_renew (&respipe))
		677	croak ("IO::AIO: unable to initialize result pipe");
		678	}
		679
		680	static void poll_wait (void)
		681	{
		682	while (eio_nreqs ())
		683	{
		684	int size;
		685
		686	X_LOCK (reslock);
		687	size = res_queue.size;
		688	X_UNLOCK (reslock);
		689
		690	if (size)
		691	return;
		692
		693	etp_maybe_start_thread ();
		694
		695	s_epipe_wait (&respipe);
		696	}
		697	}
		698
		699	static int poll_cb (void)
		700	{
		701	for (;;)
		702	{
		703	int res = eio_poll ();
		704
		705	if (res > 0)
		706	croak (0);
		707
		708	if (!max_outstanding || max_outstanding > eio_nreqs ())
		709	return res;
		710
		711	poll_wait ();
		712	}
		713	}
		714
		715	static void atfork_child (void)
		716	{
		717	create_respipe ();
		718	}
		719
		720	/*****************************************************************************/
		721
		722	#if !_POSIX_MAPPED_FILES
		723	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		724	# define munmap(addr,length) (errno = ENOSYS, -1)
		725	#endif
		726
		727	#if !_POSIX_MEMORY_PROTECTION
		728	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
		729	# define PROT_NONE 0
		730	# define PROT_WRITE 0
		731	# define MAP_PRIVATE 0
		732	# define MAP_SHARED 0
		733	# define MAP_FIXED 0
		734	#endif
		735
		736	#define MMAP_MAGIC PERL_MAGIC_ext
		737
		738	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
		739	{
		740	int old_errno = errno;
		741	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		742	errno = old_errno;
		743
		744	mg->mg_obj = 0; /* just in case */
		745
		746	SvREADONLY_off (sv);
		747
		748	if (SvPVX (sv) != mg->mg_ptr)
		749	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		750
		751	SvCUR_set (sv, 0);
		752	SvPVX (sv) = 0;
		753	SvOK_off (sv);
318		754
319	return 0;	755	return 0;
320	}	756	}
321		757
		758	static MGVTBL mmap_vtbl = {
		759	0, 0, 0, 0, mmap_free
		760	};
		761
		762	/*****************************************************************************/
		763
		764	static SV * get_cb (SV *cb_sv)
		765	{
		766	SvGETMAGIC (cb_sv);
		767	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		768	}
		769
		770	#define dREQ \
		771	SV *cb_cv; \
		772	aio_req req; \
		773	int req_pri = next_pri; \
		774	next_pri = EIO_PRI_DEFAULT; \
		775	\
		776	cb_cv = get_cb (callback); \
		777	\
		778	Newz (0, req, 1, eio_req); \
		779	if (!req) \
		780	croak ("out of memory during eio_req allocation"); \
		781	\
		782	req->callback = SvREFCNT_inc (cb_cv); \
		783	req->pri = req_pri
		784
		785	#define REQ_SEND \
		786	PUTBACK; \
		787	req_submit (req); \
		788	SPAGAIN; \
		789	\
		790	if (GIMME_V != G_VOID) \
		791	XPUSHs (req_sv (req, aio_req_stash));
		792
322	MODULE = IO::AIO PACKAGE = IO::AIO	793	MODULE = IO::AIO PACKAGE = IO::AIO
323		794
324	PROTOTYPES: ENABLE	795	PROTOTYPES: ENABLE
325		796
326	BOOT:	797	BOOT:
327	{	798	{
328	if (pipe (respipe))	799	static const struct {
329	croak ("unable to initialize result pipe");	800	const char *name;
		801	IV iv;
		802	} *civ, const_iv[] = {
		803	# define const_niv(name, value) { # name, (IV) value },
		804	# define const_iv(name) { # name, (IV) name },
		805	# define const_eio(name) { # name, (IV) EIO_ ## name },
		806	const_iv (EXDEV)
		807	const_iv (ENOSYS)
		808	const_iv (O_RDONLY)
		809	const_iv (O_WRONLY)
		810	const_iv (O_RDWR)
		811	const_iv (O_CREAT)
		812	const_iv (O_TRUNC)
		813	const_iv (O_EXCL)
		814	const_iv (O_APPEND)
330		815
331	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	816	const_iv (O_ASYNC)
332	croak ("cannot set result pipe to nonblocking mode");	817	const_iv (O_DIRECT)
		818	const_iv (O_NOATIME)
333		819
334	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	820	const_iv (O_CLOEXEC)
335	croak ("cannot set result pipe to nonblocking mode");	821	const_iv (O_NOCTTY)
336	}	822	const_iv (O_NOFOLLOW)
		823	const_iv (O_NONBLOCK)
		824	const_iv (O_EXEC)
		825	const_iv (O_SEARCH)
		826	const_iv (O_DIRECTORY)
		827	const_iv (O_DSYNC)
		828	const_iv (O_RSYNC)
		829	const_iv (O_SYNC)
		830	const_iv (O_TTY_INIT)
337		831
		832	const_iv (S_IFIFO)
		833	const_iv (S_IFCHR)
		834	const_iv (S_IFBLK)
		835	const_iv (S_IFLNK)
		836	const_iv (S_IFREG)
		837	const_iv (S_IFDIR)
		838	const_iv (S_IFWHT)
		839	const_iv (S_IFSOCK)
		840	const_iv (S_IFMT)
		841
		842	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		843	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		844	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		845	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		846	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		847	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		848
		849	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		850	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		851	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		852	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		853	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		854
		855	const_iv (ST_RDONLY)
		856	const_iv (ST_NOSUID)
		857	const_iv (ST_NODEV)
		858	const_iv (ST_NOEXEC)
		859	const_iv (ST_SYNCHRONOUS)
		860	const_iv (ST_MANDLOCK)
		861	const_iv (ST_WRITE)
		862	const_iv (ST_APPEND)
		863	const_iv (ST_IMMUTABLE)
		864	const_iv (ST_NOATIME)
		865	const_iv (ST_NODIRATIME)
		866	const_iv (ST_RELATIME)
		867
		868	const_iv (PROT_NONE)
		869	const_iv (PROT_EXEC)
		870	const_iv (PROT_READ)
		871	const_iv (PROT_WRITE)
		872
		873	/*const_iv (MAP_FIXED)*/
		874	const_iv (MAP_PRIVATE)
		875	const_iv (MAP_SHARED)
		876	const_iv (MAP_ANONYMOUS)
		877
		878	/* linuxish */
		879	const_iv (MAP_HUGETLB)
		880	const_iv (MAP_LOCKED)
		881	const_iv (MAP_NORESERVE)
		882	const_iv (MAP_POPULATE)
		883	const_iv (MAP_NONBLOCK)
		884
		885	const_eio (MCL_FUTURE)
		886	const_eio (MCL_CURRENT)
		887
		888	const_eio (MS_ASYNC)
		889	const_eio (MS_INVALIDATE)
		890	const_eio (MS_SYNC)
		891
		892	const_eio (MT_MODIFY)
		893
		894	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		895	const_eio (SYNC_FILE_RANGE_WRITE)
		896	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		897
		898	const_eio (FALLOC_FL_KEEP_SIZE)
		899
		900	const_eio (READDIR_DENTS)
		901	const_eio (READDIR_DIRS_FIRST)
		902	const_eio (READDIR_STAT_ORDER)
		903	const_eio (READDIR_FOUND_UNKNOWN)
		904
		905	const_eio (DT_UNKNOWN)
		906	const_eio (DT_FIFO)
		907	const_eio (DT_CHR)
		908	const_eio (DT_DIR)
		909	const_eio (DT_BLK)
		910	const_eio (DT_REG)
		911	const_eio (DT_LNK)
		912	const_eio (DT_SOCK)
		913	const_eio (DT_WHT)
		914	};
		915
		916	aio_stash = gv_stashpv ("IO::AIO" , 1);
		917	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		918	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		919
		920	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		921	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		922
		923	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		924
		925	create_respipe ();
		926
		927	if (eio_init (want_poll, done_poll) < 0)
		928	croak ("IO::AIO: unable to initialise eio library");
		929
		930	/* atfork child called in fifo order, so before eio's handler */
		931	X_THREAD_ATFORK (0, 0, atfork_child);
		932	}
		933
338	void	934	void
339	min_parallel(nthreads)	935	max_poll_reqs (unsigned int nreqs)
340	int nthreads
341	PROTOTYPE: $	936	PROTOTYPE: $
342	CODE:	937	CODE:
343	while (nthreads > started)	938	eio_set_max_poll_reqs (nreqs);
344	start_thread ();
345		939
346	void	940	void
347	max_parallel(nthreads)	941	max_poll_time (double nseconds)
348	int nthreads
349	PROTOTYPE: $	942	PROTOTYPE: $
350	CODE:	943	CODE:
		944	eio_set_max_poll_time (nseconds);
		945
		946	void
		947	min_parallel (unsigned int nthreads)
		948	PROTOTYPE: $
		949	CODE:
		950	eio_set_min_parallel (nthreads);
		951
		952	void
		953	max_parallel (unsigned int nthreads)
		954	PROTOTYPE: $
		955	CODE:
		956	eio_set_max_parallel (nthreads);
		957
		958	void
		959	max_idle (unsigned int nthreads)
		960	PROTOTYPE: $
		961	CODE:
		962	eio_set_max_idle (nthreads);
		963
		964	void
		965	idle_timeout (unsigned int seconds)
		966	PROTOTYPE: $
		967	CODE:
		968	eio_set_idle_timeout (seconds);
		969
		970	void
		971	max_outstanding (unsigned int maxreqs)
		972	PROTOTYPE: $
		973	CODE:
		974	max_outstanding = maxreqs;
		975
		976	void
		977	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		978	PPCODE:
351	{	979	{
352	int cur = started;	980	dREQ;
353	while (cur > nthreads)	981
354	{	982	req->type = EIO_OPEN;
355	end_thread ();	983	req->sv1 = newSVsv (pathname);
		984	req->ptr1 = SvPVbyte_nolen (req->sv1);
		985	req->int1 = flags;
		986	req->int2 = mode;
		987
		988	REQ_SEND;
		989	}
		990
		991	void
		992	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		993	ALIAS:
		994	aio_fsync = EIO_FSYNC
		995	aio_fdatasync = EIO_FDATASYNC
		996	PPCODE:
		997	{
		998	int fd = s_fileno_croak (fh, 0);
		999	dREQ;
		1000
		1001	req->type = ix;
		1002	req->sv1 = newSVsv (fh);
		1003	req->int1 = fd;
		1004
		1005	REQ_SEND (req);
		1006	}
		1007
		1008	void
		1009	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1010	PPCODE:
		1011	{
		1012	int fd = s_fileno_croak (fh, 0);
		1013	dREQ;
		1014
		1015	req->type = EIO_SYNC_FILE_RANGE;
		1016	req->sv1 = newSVsv (fh);
		1017	req->int1 = fd;
		1018	req->offs = offset;
		1019	req->size = nbytes;
		1020	req->int2 = flags;
		1021
		1022	REQ_SEND (req);
		1023	}
		1024
		1025	void
		1026	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1027	PPCODE:
		1028	{
		1029	int fd = s_fileno_croak (fh, 0);
		1030	dREQ;
		1031
		1032	req->type = EIO_FALLOCATE;
		1033	req->sv1 = newSVsv (fh);
		1034	req->int1 = fd;
		1035	req->int2 = mode;
		1036	req->offs = offset;
		1037	req->size = len;
		1038
		1039	REQ_SEND (req);
		1040	}
		1041
		1042	void
		1043	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1044	PPCODE:
		1045	{
		1046	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1047	int fd = s_fileno_croak (fh, 0);
		1048	dREQ;
		1049
		1050	if (expect_false (close_fd < 0))
		1051	{
		1052	int pipefd [2];
		1053
		1054	if (
		1055	#ifdef _WIN32
		1056	_pipe (pipefd, 1, _O_BINARY) < 0
		1057	#else
		1058	pipe (pipefd) < 0
		1059	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1060	#endif
		1061	|| close (pipefd [1]) < 0
356	cur--;	1062	)
		1063	abort (); /*D*/
		1064
		1065	close_fd = pipefd [0];
357	}	1066	}
358		1067
359	while (started > nthreads)	1068	req->type = EIO_DUP2;
		1069	req->int1 = close_fd;
		1070	req->sv2 = newSVsv (fh);
		1071	req->int2 = fd;
		1072
		1073	REQ_SEND (req);
		1074	}
		1075
		1076	void
		1077	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		1078	ALIAS:
		1079	aio_read = EIO_READ
		1080	aio_write = EIO_WRITE
		1081	PPCODE:
		1082	{
		1083	STRLEN svlen;
		1084	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		1085	char *svptr = SvPVbyte (data, svlen);
		1086	UV len = SvUV (length);
		1087
		1088	if (dataoffset < 0)
		1089	dataoffset += svlen;
		1090
		1091	if (dataoffset < 0 || dataoffset > svlen)
		1092	croak ("dataoffset outside of data scalar");
		1093
		1094	if (ix == EIO_WRITE)
		1095	{
		1096	/* write: check length and adjust. */
		1097	if (!SvOK (length) || len + dataoffset > svlen)
		1098	len = svlen - dataoffset;
		1099	}
		1100	else
		1101	{
		1102	/* read: check type and grow scalar as necessary */
		1103	SvUPGRADE (data, SVt_PV);
		1104	svptr = SvGROW (data, len + dataoffset + 1);
		1105	}
		1106
		1107	{
		1108	dREQ;
		1109
		1110	req->type = ix;
		1111	req->sv1 = newSVsv (fh);
		1112	req->int1 = fd;
		1113	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1114	req->size = len;
		1115	req->sv2 = SvREFCNT_inc (data);
		1116	req->ptr2 = (char *)svptr + dataoffset;
		1117	req->stroffset = dataoffset;
		1118
		1119	if (!SvREADONLY (data))
		1120	{
		1121	SvREADONLY_on (data);
		1122	req->flags |= FLAG_SV2_RO_OFF;
		1123	}
		1124
		1125	REQ_SEND;
		1126	}
		1127	}
		1128
		1129	void
		1130	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		1131	ALIAS:
		1132	aio_readlink = EIO_READLINK
		1133	aio_realpath = EIO_REALPATH
		1134	PPCODE:
		1135	{
		1136	dREQ;
		1137
		1138	req->type = ix;
		1139	req->sv1 = newSVsv (path);
		1140	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1141
		1142	REQ_SEND;
		1143	}
		1144
		1145	void
		1146	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1147	PPCODE:
		1148	{
		1149	int ifd = s_fileno_croak (in_fh , 0);
		1150	int ofd = s_fileno_croak (out_fh, 1);
		1151	dREQ;
		1152
		1153	req->type = EIO_SENDFILE;
		1154	req->sv1 = newSVsv (out_fh);
		1155	req->int1 = ofd;
		1156	req->sv2 = newSVsv (in_fh);
		1157	req->int2 = ifd;
		1158	req->offs = in_offset;
		1159	req->size = length;
		1160
		1161	REQ_SEND;
		1162	}
		1163
		1164	void
		1165	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		1166	PPCODE:
		1167	{
		1168	int fd = s_fileno_croak (fh, 0);
		1169	dREQ;
		1170
		1171	req->type = EIO_READAHEAD;
		1172	req->sv1 = newSVsv (fh);
		1173	req->int1 = fd;
		1174	req->offs = offset;
		1175	req->size = length;
		1176
		1177	REQ_SEND;
		1178	}
		1179
		1180	void
		1181	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		1182	ALIAS:
		1183	aio_stat = EIO_STAT
		1184	aio_lstat = EIO_LSTAT
		1185	aio_statvfs = EIO_STATVFS
		1186	PPCODE:
		1187	{
		1188	dREQ;
		1189
		1190	req->sv1 = newSVsv (fh_or_path);
		1191
		1192	if (SvPOK (req->sv1))
		1193	{
		1194	req->type = ix;
		1195	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1196	}
		1197	else
		1198	{
		1199	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
		1200	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1201	}
		1202
		1203	REQ_SEND;
		1204	}
		1205
		1206	UV
		1207	major (UV dev)
		1208	ALIAS:
		1209	minor = 1
		1210	CODE:
		1211	RETVAL = ix ? major (dev) : minor (dev);
		1212	OUTPUT:
		1213	RETVAL
		1214
		1215	UV
		1216	makedev (UV maj, UV min)
		1217	CODE:
		1218	RETVAL = makedev (maj, min);
		1219	OUTPUT:
		1220	RETVAL
		1221
		1222	void
		1223	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1224	PPCODE:
		1225	{
		1226	dREQ;
		1227
		1228	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1229	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1230	req->sv1 = newSVsv (fh_or_path);
		1231
		1232	if (SvPOK (req->sv1))
		1233	{
		1234	req->type = EIO_UTIME;
		1235	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1236	}
		1237	else
		1238	{
		1239	req->type = EIO_FUTIME;
		1240	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1241	}
		1242
		1243	REQ_SEND;
		1244	}
		1245
		1246	void
		1247	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1248	PPCODE:
		1249	{
		1250	dREQ;
		1251
		1252	req->sv1 = newSVsv (fh_or_path);
		1253	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1254
		1255	if (SvPOK (req->sv1))
		1256	{
		1257	req->type = EIO_TRUNCATE;
		1258	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1259	}
		1260	else
		1261	{
		1262	req->type = EIO_FTRUNCATE;
		1263	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1264	}
		1265
		1266	REQ_SEND;
		1267	}
		1268
		1269	void
		1270	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1271	ALIAS:
		1272	aio_chmod = EIO_CHMOD
		1273	aio_mkdir = EIO_MKDIR
		1274	PPCODE:
		1275	{
		1276	dREQ;
		1277
		1278	req->int2 = mode;
		1279	req->sv1 = newSVsv (fh_or_path);
		1280
		1281	if (SvPOK (req->sv1))
		1282	{
		1283	req->type = ix;
		1284	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1285	}
		1286	else
		1287	{
		1288	req->type = EIO_FCHMOD;
		1289	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1290	}
		1291
		1292	REQ_SEND;
		1293	}
		1294
		1295	void
		1296	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1297	PPCODE:
		1298	{
		1299	dREQ;
		1300
		1301	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1302	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1303	req->sv1 = newSVsv (fh_or_path);
		1304
		1305	if (SvPOK (req->sv1))
		1306	{
		1307	req->type = EIO_CHOWN;
		1308	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1309	}
		1310	else
		1311	{
		1312	req->type = EIO_FCHOWN;
		1313	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1314	}
		1315
		1316	REQ_SEND;
		1317	}
		1318
		1319	void
		1320	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1321	PPCODE:
		1322	{
		1323	dREQ;
		1324
		1325	req->type = EIO_READDIR;
		1326	req->sv1 = newSVsv (pathname);
		1327	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1328	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1329
		1330	if (flags & EIO_READDIR_DENTS)
		1331	req->int1 |= EIO_READDIR_CUSTOM2;
		1332
		1333	REQ_SEND;
		1334	}
		1335
		1336	void
		1337	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		1338	ALIAS:
		1339	aio_unlink = EIO_UNLINK
		1340	aio_rmdir = EIO_RMDIR
		1341	aio_readdir = EIO_READDIR
		1342	PPCODE:
		1343	{
		1344	dREQ;
		1345
		1346	req->type = ix;
		1347	req->sv1 = newSVsv (pathname);
		1348	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1349
		1350	REQ_SEND;
		1351	}
		1352
		1353	void
		1354	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		1355	ALIAS:
		1356	aio_link = EIO_LINK
		1357	aio_symlink = EIO_SYMLINK
		1358	aio_rename = EIO_RENAME
		1359	PPCODE:
		1360	{
		1361	dREQ;
		1362
		1363	req->type = ix;
		1364	req->sv1 = newSVsv (oldpath);
		1365	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1366	req->sv2 = newSVsv (newpath);
		1367	req->ptr2 = SvPVbyte_nolen (req->sv2);
		1368
		1369	REQ_SEND;
		1370	}
		1371
		1372	void
		1373	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1374	PPCODE:
		1375	{
		1376	dREQ;
		1377
		1378	req->type = EIO_MKNOD;
		1379	req->sv1 = newSVsv (pathname);
		1380	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1381	req->int2 = (mode_t)mode;
		1382	req->offs = dev;
		1383
		1384	REQ_SEND;
		1385	}
		1386
		1387	void
		1388	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1389	ALIAS:
		1390	aio_mtouch = EIO_MTOUCH
		1391	aio_msync = EIO_MSYNC
		1392	PPCODE:
		1393	{
		1394	STRLEN svlen;
		1395	char *svptr = SvPVbyte (data, svlen);
		1396	UV len = SvUV (length);
		1397
		1398	if (offset < 0)
		1399	offset += svlen;
		1400
		1401	if (offset < 0 || offset > svlen)
		1402	croak ("offset outside of scalar");
		1403
		1404	if (!SvOK (length) || len + offset > svlen)
		1405	len = svlen - offset;
		1406
		1407	{
		1408	dREQ;
		1409
		1410	req->type = ix;
		1411	req->sv2 = SvREFCNT_inc (data);
		1412	req->ptr2 = (char *)svptr + offset;
		1413	req->size = len;
		1414	req->int1 = flags;
		1415
		1416	REQ_SEND;
		1417	}
		1418	}
		1419
		1420	void
		1421	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1422	PPCODE:
		1423	{
		1424	STRLEN svlen;
		1425	char *svptr = SvPVbyte (data, svlen);
		1426	UV len = SvUV (length);
		1427
		1428	if (offset < 0)
		1429	offset += svlen;
		1430
		1431	if (offset < 0 || offset > svlen)
		1432	croak ("offset outside of scalar");
		1433
		1434	if (!SvOK (length) || len + offset > svlen)
		1435	len = svlen - offset;
		1436
		1437	{
		1438	dREQ;
		1439
		1440	req->type = EIO_MLOCK;
		1441	req->sv2 = SvREFCNT_inc (data);
		1442	req->ptr2 = (char *)svptr + offset;
		1443	req->size = len;
		1444
		1445	REQ_SEND;
		1446	}
		1447	}
		1448
		1449	void
		1450	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1451	PPCODE:
		1452	{
		1453	dREQ;
		1454
		1455	req->type = EIO_MLOCKALL;
		1456	req->int1 = flags;
		1457
		1458	REQ_SEND;
		1459	}
		1460
		1461	void
		1462	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1463	PPCODE:
		1464	{
		1465	dREQ;
		1466
		1467	req->type = EIO_BUSY;
		1468	req->nv1 = delay < 0. ? 0. : delay;
		1469
		1470	REQ_SEND;
		1471	}
		1472
		1473	void
		1474	aio_group (SV *callback=&PL_sv_undef)
		1475	PPCODE:
		1476	{
		1477	dREQ;
		1478
		1479	req->type = EIO_GROUP;
		1480
		1481	req_submit (req);
		1482	XPUSHs (req_sv (req, aio_grp_stash));
		1483	}
		1484
		1485	void
		1486	aio_nop (SV *callback=&PL_sv_undef)
		1487	ALIAS:
		1488	aio_nop = EIO_NOP
		1489	aio_sync = EIO_SYNC
		1490	PPCODE:
		1491	{
		1492	dREQ;
		1493
		1494	req->type = ix;
		1495
		1496	REQ_SEND;
		1497	}
		1498
		1499	int
		1500	aioreq_pri (int pri = 0)
		1501	CODE:
		1502	RETVAL = next_pri;
		1503	if (items > 0)
		1504	{
		1505	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1506	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1507	next_pri = pri;
		1508	}
		1509	OUTPUT:
		1510	RETVAL
		1511
		1512	void
		1513	aioreq_nice (int nice = 0)
		1514	CODE:
		1515	nice = next_pri - nice;
		1516	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1517	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1518	next_pri = nice;
		1519
		1520	void
		1521	flush ()
		1522	CODE:
		1523	while (eio_nreqs ())
360	{	1524	{
361	poll_wait ();	1525	poll_wait ();
362	poll_cb ();	1526	poll_cb ();
363	}	1527	}
364	}
365		1528
366	int	1529	int
367	max_outstanding(nreqs)	1530	poll ()
368	int nreqs
369	PROTOTYPE: $
370	CODE:
371	RETVAL = max_outstanding;
372	max_outstanding = nreqs;
373
374	void
375	aio_open(pathname,flags,mode,callback=&PL_sv_undef)
376	SV * pathname
377	int flags
378	int mode
379	SV * callback
380	PROTOTYPE: $$$;$
381	CODE:	1531	CODE:
382	{
383	aio_req req;
384
385	Newz (0, req, 1, aio_cb);
386
387	if (!req)
388	croak ("out of memory during aio_req allocation");
389
390	req->type = REQ_OPEN;
391	req->data = newSVsv (pathname);
392	req->dataptr = SvPV_nolen (req->data);
393	req->fd = flags;
394	req->mode = mode;
395	req->callback = SvREFCNT_inc (callback);
396
397	send_req (req);
398	}
399
400	void
401	aio_close(fh,callback=&PL_sv_undef)
402	SV * fh
403	SV * callback
404	PROTOTYPE: $;$
405	ALIAS:
406	aio_close = REQ_CLOSE
407	aio_fsync = REQ_FSYNC
408	aio_fdatasync = REQ_FDATASYNC
409	CODE:
410	{
411	aio_req req;
412
413	Newz (0, req, 1, aio_cb);
414
415	if (!req)
416	croak ("out of memory during aio_req allocation");
417
418	req->type = ix;
419	req->fh = newSVsv (fh);
420	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
421	req->callback = SvREFCNT_inc (callback);
422
423	send_req (req);
424	}
425
426	void
427	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)
428	SV * fh
429	UV offset
430	IV length
431	SV * data
432	IV dataoffset
433	SV * callback
434	ALIAS:
435	aio_read = REQ_READ
436	aio_write = REQ_WRITE
437	PROTOTYPE: $$$$$;$
438	CODE:
439	{
440	aio_req req;
441	STRLEN svlen;
442	char *svptr = SvPV (data, svlen);
443
444	SvUPGRADE (data, SVt_PV);
445	SvPOK_on (data);
446
447	if (dataoffset < 0)
448	dataoffset += svlen;
449
450	if (dataoffset < 0 || dataoffset > svlen)
451	croak ("data offset outside of string");
452
453	if (ix == REQ_WRITE)
454	{
455	/* write: check length and adjust. */
456	if (length < 0 || length + dataoffset > svlen)
457	length = svlen - dataoffset;
458	}
459	else
460	{
461	/* read: grow scalar as necessary */
462	svptr = SvGROW (data, length + dataoffset);
463	}
464
465	if (length < 0)
466	croak ("length must not be negative");
467
468	Newz (0, req, 1, aio_cb);
469
470	if (!req)
471	croak ("out of memory during aio_req allocation");
472
473	req->type = ix;
474	req->fh = newSVsv (fh);
475	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))
476	: IoOFP (sv_2io (fh)));
477	req->offset = offset;
478	req->length = length;
479	req->data = SvREFCNT_inc (data);
480	req->dataptr = (char *)svptr + dataoffset;
481	req->callback = SvREFCNT_inc (callback);
482
483	send_req (req);
484	}
485
486	void
487	aio_readahead(fh,offset,length,callback=&PL_sv_undef)
488	SV * fh
489	UV offset
490	IV length
491	SV * callback
492	PROTOTYPE: $$$;$
493	CODE:
494	{
495	aio_req req;
496
497	if (length < 0)
498	croak ("length must not be negative");
499
500	Newz (0, req, 1, aio_cb);
501
502	if (!req)
503	croak ("out of memory during aio_req allocation");
504
505	req->type = REQ_READAHEAD;
506	req->fh = newSVsv (fh);
507	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
508	req->offset = offset;
509	req->length = length;
510	req->callback = SvREFCNT_inc (callback);
511
512	send_req (req);
513	}
514
515	void
516	aio_stat(fh_or_path,callback=&PL_sv_undef)
517	SV * fh_or_path
518	SV * callback
519	ALIAS:
520	aio_stat = REQ_STAT
521	aio_lstat = REQ_LSTAT
522	CODE:
523	{
524	aio_req req;
525
526	Newz (0, req, 1, aio_cb);
527
528	if (!req)
529	croak ("out of memory during aio_req allocation");
530
531	New (0, req->statdata, 1, Stat_t);
532
533	if (!req->statdata)
534	croak ("out of memory during aio_req->statdata allocation");
535
536	if (SvPOK (fh_or_path))
537	{
538	req->type = ix;
539	req->data = newSVsv (fh_or_path);
540	req->dataptr = SvPV_nolen (req->data);
541	}
542	else
543	{
544	req->type = REQ_FSTAT;
545	req->fh = newSVsv (fh_or_path);
546	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
547	}
548
549	req->callback = SvREFCNT_inc (callback);
550
551	send_req (req);
552	}
553
554	void
555	aio_unlink(pathname,callback=&PL_sv_undef)
556	SV * pathname
557	SV * callback
558	CODE:
559	{
560	aio_req req;
561
562	Newz (0, req, 1, aio_cb);
563
564	if (!req)
565	croak ("out of memory during aio_req allocation");
566
567	req->type = REQ_UNLINK;
568	req->data = newSVsv (pathname);
569	req->dataptr = SvPV_nolen (req->data);
570	req->callback = SvREFCNT_inc (callback);
571
572	send_req (req);
573	}
574
575	void
576	flush()
577	PROTOTYPE:
578	CODE:
579	while (nreqs)
580	{
581	poll_wait ();	1532	poll_wait ();
582	poll_cb ();	1533	RETVAL = poll_cb ();
583	}
584
585	void
586	poll()
587	PROTOTYPE:
588	CODE:
589	if (nreqs)
590	{
591	poll_wait ();
592	poll_cb ();
593	}
594
595	int
596	poll_fileno()
597	PROTOTYPE:
598	CODE:
599	RETVAL = respipe [0];
600	OUTPUT:	1534	OUTPUT:
601	RETVAL	1535	RETVAL
602		1536
603	int	1537	int
		1538	poll_fileno ()
		1539	CODE:
		1540	RETVAL = s_epipe_fd (&respipe);
		1541	OUTPUT:
		1542	RETVAL
		1543
		1544	int
604	poll_cb(...)	1545	poll_cb (...)
605	PROTOTYPE:	1546	PROTOTYPE:
606	CODE:	1547	CODE:
607	RETVAL = poll_cb ();	1548	RETVAL = poll_cb ();
608	OUTPUT:	1549	OUTPUT:
609	RETVAL	1550	RETVAL
610		1551
611	void	1552	void
612	poll_wait()	1553	poll_wait ()
613	PROTOTYPE:
614	CODE:	1554	CODE:
615	if (nreqs)
616	poll_wait ();	1555	poll_wait ();
617		1556
618	int	1557	int
619	nreqs()	1558	nreqs ()
620	PROTOTYPE:
621	CODE:	1559	CODE:
622	RETVAL = nreqs;	1560	RETVAL = eio_nreqs ();
623	OUTPUT:	1561	OUTPUT:
624	RETVAL	1562	RETVAL
625		1563
		1564	int
		1565	nready ()
		1566	CODE:
		1567	RETVAL = eio_nready ();
		1568	OUTPUT:
		1569	RETVAL
		1570
		1571	int
		1572	npending ()
		1573	CODE:
		1574	RETVAL = eio_npending ();
		1575	OUTPUT:
		1576	RETVAL
		1577
		1578	int
		1579	nthreads ()
		1580	CODE:
		1581	RETVAL = eio_nthreads ();
		1582	OUTPUT:
		1583	RETVAL
		1584
		1585	int
		1586	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1587	CODE:
		1588	RETVAL = posix_fadvise (fh, offset, length, advice);
		1589	OUTPUT:
		1590	RETVAL
		1591
		1592	ssize_t
		1593	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1594	CODE:
		1595	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1596	OUTPUT:
		1597	RETVAL
		1598
		1599	void
		1600	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1601	PPCODE:
		1602	sv_unmagic (scalar, MMAP_MAGIC);
		1603	{
		1604	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1605	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1606	if (addr == (void *)-1)
		1607	XSRETURN_NO;
		1608
		1609	sv_force_normal (scalar);
		1610
		1611	/* we store the length in mg_obj, as namlen is I32 :/ */
		1612	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1613	->mg_obj = (SV *)length;
		1614
		1615	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1616
		1617	if (!(prot & PROT_WRITE))
		1618	SvREADONLY_on (scalar);
		1619
		1620	if (SvLEN (scalar))
		1621	Safefree (SvPVX (scalar));
		1622
		1623	SvPVX (scalar) = (char *)addr;
		1624	SvCUR_set (scalar, length);
		1625	SvLEN_set (scalar, 0);
		1626	SvPOK_only (scalar);
		1627
		1628	XSRETURN_YES;
		1629	}
		1630
		1631	void
		1632	munmap (SV *scalar)
		1633	CODE:
		1634	sv_unmagic (scalar, MMAP_MAGIC);
		1635
		1636	int
		1637	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1638	ALIAS:
		1639	mprotect = 1
		1640	CODE:
		1641	{
		1642	STRLEN svlen;
		1643	void *addr = SvPVbyte (scalar, svlen);
		1644	size_t len = SvUV (length);
		1645
		1646	if (offset < 0)
		1647	offset += svlen;
		1648
		1649	if (offset < 0 || offset > svlen)
		1650	croak ("offset outside of scalar");
		1651
		1652	if (!SvOK (length) || len + offset > svlen)
		1653	len = svlen - offset;
		1654
		1655	addr = (void *)(((intptr_t)addr) + offset);
		1656	eio_page_align (&addr, &len);
		1657
		1658	switch (ix)
		1659	{
		1660	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1661	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1662	}
		1663	}
		1664	OUTPUT:
		1665	RETVAL
		1666
		1667	int
		1668	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1669	CODE:
		1670	{
		1671	STRLEN svlen;
		1672	void *addr = SvPVbyte (scalar, svlen);
		1673	size_t len = SvUV (length);
		1674
		1675	if (offset < 0)
		1676	offset += svlen;
		1677
		1678	if (offset < 0 || offset > svlen)
		1679	croak ("offset outside of scalar");
		1680
		1681	if (!SvOK (length) || len + offset > svlen)
		1682	len = svlen - offset;
		1683
		1684	addr = (void *)(((intptr_t)addr) + offset);
		1685	eio_page_align (&addr, &len);
		1686	#if _POSIX_MEMLOCK_RANGE
		1687	RETVAL = munlock (addr, len);
		1688	#else
		1689	RETVAL = ((errno = ENOSYS), -1);
		1690	#endif
		1691	}
		1692	OUTPUT:
		1693	RETVAL
		1694
		1695	int
		1696	munlockall ()
		1697	CODE:
		1698	#if _POSIX_MEMLOCK
		1699	munlockall ();
		1700	#else
		1701	RETVAL = -1;
		1702	errno = ENOSYS;
		1703	#endif
		1704	OUTPUT:
		1705	RETVAL
		1706
		1707	void _on_next_submit (SV *cb)
		1708	CODE:
		1709	SvREFCNT_dec (on_next_submit);
		1710	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1711
		1712	PROTOTYPES: DISABLE
		1713
		1714	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1715
		1716	void
		1717	cancel (aio_req_ornot req)
		1718	CODE:
		1719	eio_cancel (req);
		1720
		1721	void
		1722	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1723	PPCODE:
		1724	{
		1725	if (GIMME_V != G_VOID)
		1726	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1727
		1728	if (items > 1)
		1729	{
		1730	SV *cb_cv =get_cb (callback);
		1731
		1732	SvREFCNT_dec (req->callback);
		1733	req->callback = SvREFCNT_inc (cb_cv);
		1734	}
		1735	}
		1736
		1737	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1738
		1739	void
		1740	add (aio_req grp, ...)
		1741	PPCODE:
		1742	{
		1743	int i;
		1744
		1745	if (grp->int1 == 2)
		1746	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1747
		1748	for (i = 1; i < items; ++i )
		1749	{
		1750	aio_req req;
		1751
		1752	if (GIMME_V != G_VOID)
		1753	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1754
		1755	req = SvAIO_REQ (ST (i));
		1756
		1757	if (req)
		1758	eio_grp_add (grp, req);
		1759	}
		1760	}
		1761
		1762	void
		1763	cancel_subs (aio_req_ornot req)
		1764	CODE:
		1765	req_cancel_subs (req);
		1766
		1767	void
		1768	result (aio_req grp, ...)
		1769	CODE:
		1770	{
		1771	int i;
		1772	AV *av;
		1773
		1774	grp->errorno = errno;
		1775
		1776	av = newAV ();
		1777	av_extend (av, items - 1);
		1778
		1779	for (i = 1; i < items; ++i )
		1780	av_push (av, newSVsv (ST (i)));
		1781
		1782	SvREFCNT_dec (grp->sv1);
		1783	grp->sv1 = (SV *)av;
		1784	}
		1785
		1786	void
		1787	errno (aio_req grp, int errorno = errno)
		1788	CODE:
		1789	grp->errorno = errorno;
		1790
		1791	void
		1792	limit (aio_req grp, int limit)
		1793	CODE:
		1794	eio_grp_limit (grp, limit);
		1795
		1796	void
		1797	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1798	CODE:
		1799	{
		1800	SvREFCNT_dec (grp->sv2);
		1801	grp->sv2 = newSVsv (callback);
		1802	grp->feed = aio_grp_feed;
		1803
		1804	if (grp->int2 <= 0)
		1805	grp->int2 = 2;
		1806
		1807	eio_grp_limit (grp, grp->int2);
		1808	}
		1809

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