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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.24 by root, Wed Aug 17 03:01:56 2005 UTC vs.
Revision 1.250 by root, Fri Sep 22 05:20:39 2017 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
10	#include <sys/types.h>	14	#include <sys/types.h>
11	#include <sys/stat.h>	15	#include <sys/stat.h>
12
13	#include <unistd.h>	16	#include <limits.h>
14	#include <fcntl.h>	17	#include <fcntl.h>
15	#include <signal.h>
16	#include <sched.h>	18	#include <sched.h>
17		19
18	#include <pthread.h>	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
		21	# include <sys/mman.h>
		22	#endif
19		23
20	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	24	/* the incompetent fool that created musl keeps __linux__, refuses
21	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */	25	* to implement any linux standard apis, and also has no way to test
22	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */	26	* for his broken iplementation. don't complain to me if this fails
		27	* for you.
		28	*/
		29	#if __linux__ && (defined __GLIBC__ || defined __UCLIBC__)
		30	# include <linux/fs.h>
		31	# ifdef FS_IOC_FIEMAP
		32	# include <linux/types.h>
		33	# include <linux/fiemap.h>
		34	# define HAVE_FIEMAP 1
		35	# endif
		36	#endif
23		37
24	#if __ia64	38	/* perl namespace pollution */
25	# define STACKSIZE 65536	39	#undef VERSION
		40
		41	/* perl stupidly overrides readdir and maybe others */
		42	/* with thread-unsafe versions, imagine that :( */
		43	#undef readdir
		44	#undef opendir
		45	#undef closedir
		46
		47	#ifdef _WIN32
		48
		49	// perl overrides all those nice libc functions
		50
		51	#undef malloc
		52	#undef free
		53	#undef open
		54	#undef read
		55	#undef write
		56	#undef send
		57	#undef recv
		58	#undef stat
		59	#undef lstat
		60	#undef fstat
		61	#undef truncate
		62	#undef ftruncate
		63	#undef open
		64	#undef link
		65	#undef close
		66	#undef unlink
		67	#undef mkdir
		68	#undef rmdir
		69	#undef rename
		70	#undef lseek
		71	#undef opendir
		72	#undef readdir
		73	#undef closedir
		74	#undef chmod
		75	#undef fchmod
		76	#undef dup
		77	#undef dup2
		78	#undef abort
		79	#undef pipe
		80
		81	#define EIO_STRUCT_STAT struct _stati64
		82	#define EIO_STRUCT_STATI64
		83
26	#else	84	#else
27	# define STACKSIZE 4096	85
		86	#include <sys/time.h>
		87	#include <sys/select.h>
		88	#include <unistd.h>
		89	#include <utime.h>
		90	#include <signal.h>
		91
		92	#define EIO_STRUCT_STAT Stat_t
		93
		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	#include "libeio/config.h"
		110
		111	#if HAVE_RLIMITS
		112	#include <sys/time.h>
		113	#include <sys/resource.h>
		114	#endif
		115
		116	typedef SV SV8; /* byte-sv, used for argument-checking */
		117	typedef int aio_rfd; /* read file desriptor */
		118	typedef int aio_wfd; /* write file descriptor */
		119
		120	static HV *aio_stash, *aio_req_stash, *aio_grp_stash, *aio_wd_stash;
		121
		122	#define EIO_REQ_MEMBERS \
		123	SV *callback; \
		124	SV *sv1, *sv2; \
		125	SV *sv3, *sv4; \
		126	STRLEN stroffset; \
		127	SV *self;
		128
		129	#define EIO_NO_WRAPPERS 1
		130
		131	#include "libeio/eio.h"
		132
		133	static int req_invoke (eio_req *req);
		134	#define EIO_FINISH(req) req_invoke (req)
		135	static void req_destroy (eio_req *grp);
		136	#define EIO_DESTROY(req) req_destroy (req)
		137
		138	#include "libeio/eio.c"
		139
		140	#if !HAVE_POSIX_FADVISE
		141	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		142	#endif
		143
		144	#if !HAVE_POSIX_MADVISE
		145	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		146	#endif
		147
		148	#ifndef MAP_ANONYMOUS
		149	# ifdef MAP_ANON
		150	# define MAP_ANONYMOUS MAP_ANON
		151	# else
		152	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
28	#endif	153	# endif
		154	#endif
		155
		156	/* defines all sorts of constants to 0 unless they are already defined */
		157	/* also provides const_iv_ and const_niv_ macros for them */
		158	#include "def0.h"
		159
		160	#ifndef makedev
		161	# define makedev(maj,min) (((maj) << 8) | (min))
		162	#endif
		163	#ifndef major
		164	# define major(dev) ((dev) >> 8)
		165	#endif
		166	#ifndef minor
		167	# define minor(dev) ((dev) & 0xff)
		168	#endif
		169
		170	#if PAGESIZE <= 0
		171	# define PAGESIZE sysconf (_SC_PAGESIZE)
		172	#endif
		173
		174	/*****************************************************************************/
		175
		176	static void
		177	fiemap (eio_req *req)
		178	{
		179	req->result = -1;
		180
		181	#if HAVE_FIEMAP
		182	/* assume some c99 */
		183	struct fiemap *fiemap = 0;
		184	size_t end_offset;
		185	int count = req->int3;
		186
		187	req->flags |= EIO_FLAG_PTR1_FREE;
		188
		189	/* heuristic: start with 512 bytes (8 extents), and if that isn't enough, */
		190	/* increase in 3.5kb steps */
		191	if (count < 0)
		192	count = 8;
		193
		194	fiemap = malloc (sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		195	errno = ENOMEM;
		196	if (!fiemap)
		197	return;
		198
		199	req->ptr1 = fiemap;
		200
		201	fiemap->fm_start = req->offs;
		202	fiemap->fm_length = req->size;
		203	fiemap->fm_flags = req->int2;
		204	fiemap->fm_extent_count = count;
		205
		206	if (ioctl (req->int1, FS_IOC_FIEMAP, fiemap) < 0)
		207	return;
		208
		209	if (req->int3 >= 0 /* not autosizing */
		210	|| !fiemap->fm_mapped_extents /* no more extents */
		211	|| fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_flags & FIEMAP_EXTENT_LAST /* hit eof */)
		212	goto done;
		213
		214	/* else we have to loop -
		215	* it would be tempting (actually I tried that first) to just query the
		216	* number of extents needed, but linux often feels like not returning all
		217	* extents, without telling us it left any out. this complicates
		218	* this quite a bit.
		219	*/
		220
		221	end_offset = fiemap->fm_length + (fiemap->fm_length == FIEMAP_MAX_OFFSET ? 0 : fiemap->fm_start);
		222
		223	for (;;)
		224	{
		225	/* we go in 54 extent steps - 3kb, in the hope that this fits nicely on the eio stack (normally 16+ kb) */
		226	char scratch[3072];
		227	struct fiemap *incmap = (struct fiemap *)scratch;
		228
		229	incmap->fm_start = fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_logical
		230	+ fiemap->fm_extents [fiemap->fm_mapped_extents - 1].fe_length;
		231	incmap->fm_length = fiemap->fm_length - (incmap->fm_start - fiemap->fm_start);
		232	incmap->fm_flags = fiemap->fm_flags;
		233	incmap->fm_extent_count = (sizeof (scratch) - sizeof (struct fiemap)) / sizeof (struct fiemap_extent);
		234
		235	if (ioctl (req->int1, FS_IOC_FIEMAP, incmap) < 0)
		236	return;
		237
		238	if (!incmap->fm_mapped_extents)
		239	goto done;
		240
		241	count = fiemap->fm_mapped_extents + incmap->fm_mapped_extents;
		242	fiemap = realloc (fiemap, sizeof (*fiemap) + sizeof (struct fiemap_extent) * count);
		243	errno = ENOMEM;
		244	if (!fiemap)
		245	return;
		246
		247	req->ptr1 = fiemap;
		248
		249	for (count = 0; count < incmap->fm_mapped_extents; ++count)
		250	{
		251	struct fiemap_extent *e = incmap->fm_extents + count;
		252
		253	if (e->fe_logical + e->fe_length >= end_offset)
		254	goto done;
		255
		256	fiemap->fm_extents [fiemap->fm_mapped_extents++] = *e;
		257
		258	if (e->fe_flags & FIEMAP_EXTENT_LAST)
		259	goto done;
		260
		261	}
		262	}
		263
		264	done:
		265	req->result = 0;
		266
		267	#else
		268	errno = ENOSYS;
		269	#endif
		270	}
		271
		272	/*****************************************************************************/
29		273
30	enum {	274	enum {
31	REQ_QUIT,	275	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
32	REQ_OPEN, REQ_CLOSE,
33	REQ_READ, REQ_WRITE, REQ_READAHEAD,
34	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
35	REQ_FSYNC, REQ_FDATASYNC,
36	REQ_UNLINK, REQ_RMDIR,
37	REQ_SYMLINK,
38	};	276	};
39		277
40	typedef struct aio_cb {
41	struct aio_cb *volatile next;
42
43	int type;
44
45	int fd;
46	off_t offset;
47	size_t length;
48	ssize_t result;
49	mode_t mode; /* open */
50	int errorno;
51	SV *data, *callback, *fh;
52	void *dataptr, *data2ptr;
53	STRLEN dataoffset;
54
55	Stat_t *statdata;
56	} aio_cb;
57
58	typedef aio_cb *aio_req;	278	typedef eio_req *aio_req;
		279	typedef eio_req *aio_req_ornot;
		280	typedef eio_wd aio_wd;
59		281
60	static int started;	282	static SV *on_next_submit;
61	static volatile int nreqs;	283	static int next_pri = EIO_PRI_DEFAULT;
62	static int max_outstanding = 1<<30;	284	static int max_outstanding;
63	static int respipe [2];
64		285
65	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	286	static s_epipe respipe;
66	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
67	static pthread_mutex_t frklock = PTHREAD_MUTEX_INITIALIZER;
68	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
69		287
70	static volatile aio_req reqs, reqe; /* queue start, queue end */	288	static void req_destroy (aio_req req);
71	static volatile aio_req ress, rese; /* queue start, queue end */	289	static void req_cancel (aio_req req);
72		290
73	static void	291	static void
74	poll_wait ()	292	want_poll (void)
75	{	293	{
76	if (nreqs && !ress)	294	/* write a dummy byte to the pipe so fh becomes ready */
		295	s_epipe_signal (&respipe);
		296	}
		297
		298	static void
		299	done_poll (void)
		300	{
		301	/* read any signals sent by the worker threads */
		302	s_epipe_drain (&respipe);
		303	}
		304
		305	/* must be called at most once */
		306	static SV *
		307	req_sv (aio_req req, HV *stash)
		308	{
		309	if (!req->self)
77	{	310	{
78	fd_set rfd;	311	req->self = (SV *)newHV ();
79	FD_ZERO(&rfd);	312	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
80	FD_SET(respipe [0], &rfd);
81
82	select (respipe [0] + 1, &rfd, 0, 0, 0);
83	}	313	}
		314
		315	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
		316	}
		317
		318	static SV *
		319	newSVaio_wd (aio_wd wd)
		320	{
		321	return sv_bless (newRV_noinc (newSViv ((intptr_t)wd)), aio_wd_stash);
		322	}
		323
		324	static aio_req
		325	SvAIO_REQ (SV *sv)
		326	{
		327	MAGIC *mg;
		328
		329	if (!SvROK (sv)
		330	/* for speed reasons, we do not verify that SvROK actually has a stash ptr */
		331	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		332	&& SvSTASH (SvRV (sv)) != aio_req_stash
		333	&& !sv_derived_from (sv, "IO::AIO::REQ")))
		334	croak ("object of class IO::AIO::REQ expected");
		335
		336	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		337
		338	return mg ? (aio_req)mg->mg_ptr : 0;
		339	}
		340
		341	static aio_wd
		342	SvAIO_WD (SV *sv)
		343	{
		344	if (!SvROK (sv)
		345	|| SvTYPE (SvRV (sv)) != SVt_PVMG
		346	|| SvSTASH (SvRV (sv)) != aio_wd_stash)
		347	croak ("IO::AIO: expected a working directory object as returned by aio_wd");
		348
		349	return (aio_wd)(long)SvIVX (SvRV (sv));
		350	}
		351
		352	static SV *
		353	newmortalFH (int fd, int flags)
		354	{
		355	if (fd < 0)
		356	return &PL_sv_undef;
		357
		358	GV *gv = (GV *)sv_newmortal ();
		359	char sym[64];
		360	int symlen;
		361
		362	symlen = snprintf (sym, sizeof (sym), "fd#%d", fd);
		363	gv_init (gv, aio_stash, sym, symlen, 0);
		364
		365	symlen = snprintf (
		366	sym,
		367	sizeof (sym),
		368	"%s&=%d",
		369	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		370	fd
		371	);
		372
		373	return do_open (gv, sym, symlen, 0, 0, 0, 0)
		374	? (SV *)gv : &PL_sv_undef;
		375	}
		376
		377	static void
		378	aio_grp_feed (aio_req grp)
		379	{
		380	if (grp->sv2 && SvOK (grp->sv2))
		381	{
		382	dSP;
		383
		384	ENTER;
		385	SAVETMPS;
		386	PUSHMARK (SP);
		387	XPUSHs (req_sv (grp, aio_grp_stash));
		388	PUTBACK;
		389	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		390	SPAGAIN;
		391	FREETMPS;
		392	LEAVE;
		393	}
		394	}
		395
		396	static void
		397	req_submit (eio_req *req)
		398	{
		399	eio_submit (req);
		400
		401	if (expect_false (on_next_submit))
		402	{
		403	dSP;
		404	SV *cb = sv_2mortal (on_next_submit);
		405
		406	on_next_submit = 0;
		407
		408	PUSHMARK (SP);
		409	PUTBACK;
		410	call_sv (cb, G_DISCARD | G_EVAL);
		411	}
84	}	412	}
85		413
86	static int	414	static int
87	poll_cb ()	415	req_invoke (eio_req *req)
88	{	416	{
89	dSP;	417	if (req->flags & FLAG_SV2_RO_OFF)
90	int count = 0;	418	SvREADONLY_off (req->sv2);
91	int do_croak = 0;
92	aio_req req, prv;
93		419
94	pthread_mutex_lock (&reslock);	420	if (!EIO_CANCELLED (req) && req->callback)
95
96	{
97	/* read any signals sent by the worker threads */
98	char buf [32];
99	while (read (respipe [0], buf, 32) == 32)
100	;
101	}
102
103	req = ress;
104	ress = rese = 0;
105
106	pthread_mutex_unlock (&reslock);
107
108	while (req)
109	{	421	{
110	nreqs--;	422	dSP;
		423	static SV *sv_result_cache; /* caches the result integer SV */
		424	SV *sv_result;
111		425
112	if (req->type == REQ_QUIT)	426	ENTER;
113	started--;	427	SAVETMPS;
114	else	428	PUSHMARK (SP);
		429	EXTEND (SP, 1);
		430
		431	/* do not recreate the result IV from scratch each time */
		432	if (expect_true (sv_result_cache))
115	{	433	{
116	int errorno = errno;	434	sv_result = sv_result_cache; sv_result_cache = 0;
117	errno = req->errorno;	435	SvIV_set (sv_result, req->result);
118		436	SvIOK_only (sv_result);
119	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset
121	+ req->result > 0 ? req->result : 0);
122
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->fh)
127	SvREFCNT_dec (req->fh);
128
129	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
130	{
131	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
132	PL_laststatval = req->result;
133	PL_statcache = *(req->statdata);
134
135	Safefree (req->statdata);
136	}
137
138	ENTER;
139	PUSHMARK (SP);
140	XPUSHs (sv_2mortal (newSViv (req->result)));
141
142	if (req->type == REQ_OPEN)
143	{
144	/* convert fd to fh */
145	SV *fh;
146
147	PUTBACK;
148	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
149	SPAGAIN;
150
151	fh = SvREFCNT_inc (POPs);
152
153	PUSHMARK (SP);
154	XPUSHs (sv_2mortal (fh));
155	}
156
157	if (SvOK (req->callback))
158	{
159	PUTBACK;
160	call_sv (req->callback, G_VOID | G_EVAL);
161	SPAGAIN;
162	}
163
164	do_croak = SvTRUE (ERRSV);
165
166	LEAVE;
167
168	if (req->callback)
169	SvREFCNT_dec (req->callback);
170
171	errno = errorno;
172	count++;
173	}
174
175	prv = req;
176	req = req->next;
177	Safefree (prv);
178
179	if (do_croak)
180	croak (0);
181	}
182
183	return count;
184	}
185
186	static void *aio_proc(void *arg);
187
188	static void
189	start_thread (void)
190	{
191	sigset_t fullsigset, oldsigset;
192	pthread_t tid;
193	pthread_attr_t attr;
194
195	pthread_attr_init (&attr);
196	pthread_attr_setstacksize (&attr, STACKSIZE);
197	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
198
199	sigfillset (&fullsigset);
200	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
201
202	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
203	started++;
204
205	sigprocmask (SIG_SETMASK, &oldsigset, 0);
206	}
207
208	static void
209	send_req (aio_req req)
210	{
211	nreqs++;
212
213	pthread_mutex_lock (&reqlock);
214
215	req->next = 0;
216
217	if (reqe)
218	{
219	reqe->next = req;
220	reqe = req;
221	}
222	else
223	reqe = reqs = req;
224
225	pthread_cond_signal (&reqwait);
226	pthread_mutex_unlock (&reqlock);
227
228	while (nreqs > max_outstanding)
229	{
230	poll_wait ();
231	poll_cb ();
232	}
233	}
234
235	static void
236	end_thread (void)
237	{
238	aio_req req;
239	New (0, req, 1, aio_cb);
240	req->type = REQ_QUIT;
241
242	send_req (req);
243	}
244
245
246	static void min_parallel (int nthreads)
247	{
248	while (nthreads > started)
249	start_thread ();
250	}
251
252	static void max_parallel (int nthreads)
253	{
254	int cur = started;
255	while (cur > nthreads)
256	{
257	end_thread ();
258	cur--;
259	}
260
261	while (started > nthreads)
262	{
263	poll_wait ();
264	poll_cb ();
265	}
266	}
267
268	static int fork_started;
269
270	static void atfork_prepare (void)
271	{
272	pthread_mutex_lock (&frklock);
273
274	fork_started = started;
275
276	for (;;) {
277	while (nreqs)
278	{
279	poll_wait ();
280	poll_cb ();
281	}
282
283	max_parallel (0);
284
285	pthread_mutex_lock (&reqlock);
286
287	if (!nreqs && !started)
288	break;
289
290	pthread_mutex_unlock (&reqlock);
291
292	min_parallel (fork_started);
293	}
294
295	pthread_mutex_lock (&reslock);
296
297	assert (!started);
298	assert (!nreqs);
299	assert (!reqs && !reqe);
300	assert (!ress && !rese);
301	}
302
303	static void atfork_parent (void)
304	{
305	pthread_mutex_unlock (&reslock);
306	min_parallel (fork_started);
307	pthread_mutex_unlock (&reqlock);
308	pthread_mutex_unlock (&frklock);
309	}
310
311	static void atfork_child (void)
312	{
313	reqs = reqe = 0;
314
315	atfork_parent ();
316	}
317
318	/*****************************************************************************/
319	/* work around various missing functions */
320
321	#if !HAVE_PREADWRITE
322	# define pread aio_pread
323	# define pwrite aio_pwrite
324
325	/*
326	* make our pread/pwrite safe against themselves, but not against
327	* normal read/write by using a mutex. slows down execution a lot,
328	* but that's your problem, not mine.
329	*/
330	static pthread_mutex_t iolock = PTHREAD_MUTEX_INITIALIZER;
331
332	static ssize_t
333	pread (int fd, void *buf, size_t count, off_t offset)
334	{
335	ssize_t res;
336	off_t ooffset;
337
338	pthread_mutex_lock (&iolock);
339	ooffset = lseek (fd, 0, SEEK_CUR);
340	lseek (fd, offset, SEEK_SET);
341	res = read (fd, buf, count);
342	lseek (fd, ooffset, SEEK_SET);
343	pthread_mutex_unlock (&iolock);
344
345	return res;
346	}
347
348	static ssize_t
349	pwrite (int fd, void *buf, size_t count, off_t offset)
350	{
351	ssize_t res;
352	off_t ooffset;
353
354	pthread_mutex_lock (&iolock);
355	ooffset = lseek (fd, 0, SEEK_CUR);
356	lseek (fd, offset, SEEK_SET);
357	res = write (fd, buf, count);
358	lseek (fd, offset, SEEK_SET);
359	pthread_mutex_unlock (&iolock);
360
361	return res;
362	}
363	#endif
364
365	#if !HAVE_FDATASYNC
366	# define fdatasync fsync
367	#endif
368
369	#if !HAVE_READAHEAD
370	# define readahead aio_readahead
371
372	static char readahead_buf[4096];
373
374	static ssize_t
375	readahead (int fd, off_t offset, size_t count)
376	{
377	while (count > 0)
378	{
379	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
380
381	pread (fd, readahead_buf, len, offset);
382	offset += len;
383	count -= len;
384	}
385
386	errno = 0;
387	}
388	#endif
389
390	/*****************************************************************************/
391
392	static void *
393	aio_proc (void *thr_arg)
394	{
395	aio_req req;
396	int type;
397
398	do
399	{
400	pthread_mutex_lock (&reqlock);
401
402	for (;;)
403	{
404	req = reqs;
405
406	if (reqs)
407	{
408	reqs = reqs->next;
409	if (!reqs) reqe = 0;
410	}
411
412	if (req)
413	break;
414
415	pthread_cond_wait (&reqwait, &reqlock);
416	}
417
418	pthread_mutex_unlock (&reqlock);
419
420	errno = 0; /* strictly unnecessary */
421
422	type = req->type;
423
424	switch (type)
425	{
426	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
427	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
428
429	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
430
431	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
432	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
433	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
434
435	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
436	case REQ_CLOSE: req->result = close (req->fd); break;
437	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
438	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
439	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
440
441	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
442	case REQ_FSYNC: req->result = fsync (req->fd); break;
443
444	case REQ_QUIT:
445	break;
446
447	default:
448	req->result = ENOSYS;
449	break;
450	}
451
452	req->errorno = errno;
453
454	pthread_mutex_lock (&reslock);
455
456	req->next = 0;
457
458	if (rese)
459	{
460	rese->next = req;
461	rese = req;
462	}	437	}
463	else	438	else
464	{	439	{
465	rese = ress = req;	440	sv_result = newSViv (req->result);
466		441	SvREADONLY_on (sv_result);
467	/* write a dummy byte to the pipe so fh becomes ready */
468	write (respipe [1], &respipe, 1);
469	}	442	}
470		443
471	pthread_mutex_unlock (&reslock);	444	switch (req->type)
		445	{
		446	case EIO_WD_OPEN:
		447	PUSHs (req->result ? &PL_sv_undef : sv_2mortal (newSVaio_wd (req->wd)));
		448	break;
		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	PUSHs (newmortalFH (req->result, req->int1 & (O_RDONLY | O_WRONLY | O_RDWR)));
		513	break;
		514
		515	case EIO_STATVFS:
		516	case EIO_FSTATVFS:
		517	{
		518	SV *rv = &PL_sv_undef;
		519
		520	#ifndef _WIN32
		521	if (req->result >= 0)
		522	{
		523	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		524	HV *hv = newHV ();
		525	/* POSIX requires fsid to be unsigned long, but AIX in its infinite wisdom
		526	* chooses to make it a struct.
		527	*/
		528	unsigned long fsid = 0;
		529	memcpy (&fsid, &f->f_fsid, sizeof (unsigned long) < sizeof (f->f_fsid) ? sizeof (unsigned long) : sizeof (f->f_fsid));
		530
		531	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		532
		533	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		534	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		535	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		536	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		537	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		538	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		539	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		540	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		541	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (fsid ), 0);
		542	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		543	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		544	}
		545	#endif
		546
		547	PUSHs (rv);
		548	}
		549
		550	break;
		551
		552	case EIO_GROUP:
		553	req->int1 = 2; /* mark group as finished */
		554
		555	if (req->sv1)
		556	{
		557	int i;
		558	AV *av = (AV *)req->sv1;
		559
		560	EXTEND (SP, AvFILL (av) + 1);
		561	for (i = 0; i <= AvFILL (av); ++i)
		562	PUSHs (*av_fetch (av, i, 0));
		563	}
		564	break;
		565
		566	case EIO_NOP:
		567	case EIO_BUSY:
		568	break;
		569
		570	case EIO_READLINK:
		571	case EIO_REALPATH:
		572	if (req->result > 0)
		573	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		574	break;
		575
		576	case EIO_STAT:
		577	case EIO_LSTAT:
		578	case EIO_FSTAT:
		579	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		580
		581	if (!(PL_laststatval = req->result))
		582	/* if compilation fails here then perl's Stat_t is not struct _stati64 */
		583	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		584
		585	PUSHs (sv_result);
		586	break;
		587
		588	case EIO_SEEK:
		589	PUSHs (req->result ? sv_result : sv_2mortal (newSVval64 (req->offs)));
		590	break;
		591
		592	case EIO_READ:
		593	{
		594	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		595	*SvEND (req->sv2) = 0;
		596	SvPOK_only (req->sv2);
		597	SvSETMAGIC (req->sv2);
		598	PUSHs (sv_result);
		599	}
		600	break;
		601
		602	case EIO_CUSTOM:
		603	if (req->feed == fiemap)
		604	{
		605	#if HAVE_FIEMAP
		606	if (!req->result)
		607	{
		608	struct fiemap *fiemap = (struct fiemap *)req->ptr1;
		609
		610	if (fiemap->fm_extent_count)
		611	{
		612	AV *av = newAV ();
		613	int i;
		614
		615	while (fiemap->fm_mapped_extents)
		616	{
		617	struct fiemap_extent *extent = &fiemap->fm_extents [--fiemap->fm_mapped_extents];
		618	AV *ext_av = newAV ();
		619
		620	av_store (ext_av, 3, newSVuv (extent->fe_flags));
		621	av_store (ext_av, 2, newSVval64 (extent->fe_length));
		622	av_store (ext_av, 1, newSVval64 (extent->fe_physical));
		623	av_store (ext_av, 0, newSVval64 (extent->fe_logical));
		624
		625	av_store (av, fiemap->fm_mapped_extents, newRV_noinc ((SV *)ext_av));
		626	}
		627
		628	PUSHs (sv_2mortal (newRV_noinc ((SV *)av)));
		629	}
		630	else
		631	{
		632	SvIV_set (sv_result, fiemap->fm_mapped_extents);
		633	PUSHs (sv_result);
		634	}
		635	}
		636	#endif
		637	}
		638	else
		639	PUSHs (sv_result);
		640	break;
		641
		642	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		643	if (req->result > 0)
		644	SvIV_set (sv_result, 0);
		645	/* FALLTHROUGH */
		646
		647	default:
		648	PUSHs (sv_result);
		649	break;
		650	}
		651
		652	errno = req->errorno;
		653
		654	PUTBACK;
		655	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		656	SPAGAIN;
		657
		658	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		659	SvREFCNT_dec (sv_result);
		660	else
		661	sv_result_cache = sv_result;
		662
		663	FREETMPS;
		664	LEAVE;
		665
		666	PUTBACK;
472	}	667	}
473	while (type != REQ_QUIT);	668
		669	return !!SvTRUE (ERRSV);
		670	}
		671
		672	static void
		673	req_destroy (aio_req req)
		674	{
		675	if (req->self)
		676	{
		677	sv_unmagic (req->self, PERL_MAGIC_ext);
		678	SvREFCNT_dec (req->self);
		679	}
		680
		681	SvREFCNT_dec (req->sv1);
		682	SvREFCNT_dec (req->sv2);
		683	SvREFCNT_dec (req->sv3);
		684	SvREFCNT_dec (req->sv4);
		685	SvREFCNT_dec (req->callback);
		686
		687	free (req);
		688	}
		689
		690	static void
		691	req_cancel_subs (aio_req grp)
		692	{
		693	if (grp->type != EIO_GROUP)
		694	return;
		695
		696	SvREFCNT_dec (grp->sv2);
		697	grp->sv2 = 0;
		698
		699	eio_grp_cancel (grp);
		700	}
		701
		702	static void ecb_cold
		703	create_respipe (void)
		704	{
		705	if (s_epipe_renew (&respipe))
		706	croak ("IO::AIO: unable to initialize result pipe");
		707	}
		708
		709	static void
		710	poll_wait (void)
		711	{
		712	while (eio_nreqs ())
		713	{
		714	int size;
		715
		716	X_LOCK (EIO_POOL->reslock);
		717	size = EIO_POOL->res_queue.size;
		718	X_UNLOCK (EIO_POOL->reslock);
		719
		720	if (size)
		721	return;
		722
		723	etp_maybe_start_thread (EIO_POOL);
		724
		725	s_epipe_wait (&respipe);
		726	}
		727	}
		728
		729	static int
		730	poll_cb (void)
		731	{
		732	for (;;)
		733	{
		734	int res = eio_poll ();
		735
		736	if (res > 0)
		737	croak (0);
		738
		739	if (!max_outstanding || max_outstanding > eio_nreqs ())
		740	return res;
		741
		742	poll_wait ();
		743	}
		744	}
		745
		746	static void ecb_cold
		747	reinit (void)
		748	{
		749	create_respipe ();
		750
		751	if (eio_init (want_poll, done_poll) < 0)
		752	croak ("IO::AIO: unable to initialise eio library");
		753	}
		754
		755	/*****************************************************************************/
		756
		757	#if !_POSIX_MAPPED_FILES
		758	# define mmap(addr,length,prot,flags,fd,offs) EIO_ENOSYS ()
		759	# define munmap(addr,length) EIO_ENOSYS ()
		760	#endif
		761
		762	#if !_POSIX_MEMORY_PROTECTION
		763	# define mprotect(addr,len,prot) EIO_ENOSYS ()
		764	#endif
		765
		766	#define MMAP_MAGIC PERL_MAGIC_ext
		767
		768	static int ecb_cold
		769	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		770	{
		771	int old_errno = errno;
		772	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		773	errno = old_errno;
		774
		775	mg->mg_obj = 0; /* just in case */
		776
		777	SvREADONLY_off (sv);
		778
		779	if (SvPVX (sv) != mg->mg_ptr)
		780	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		781
		782	SvCUR_set (sv, 0);
		783	SvPVX (sv) = 0;
		784	SvOK_off (sv);
474		785
475	return 0;	786	return 0;
476	}	787	}
477		788
		789	static MGVTBL mmap_vtbl = {
		790	0, 0, 0, 0, mmap_free
		791	};
		792
		793	/*****************************************************************************/
		794
		795	static SV *
		796	get_cb (SV *cb_sv)
		797	{
		798	SvGETMAGIC (cb_sv);
		799	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
		800	}
		801
		802	static aio_req ecb_noinline
		803	dreq (SV *callback)
		804	{
		805	SV *cb_cv;
		806	aio_req req;
		807	int req_pri = next_pri;
		808	next_pri = EIO_PRI_DEFAULT;
		809
		810	cb_cv = get_cb (callback);
		811
		812	req = calloc (sizeof (*req), 1);
		813	if (!req)
		814	croak ("out of memory during eio_req allocation");
		815
		816	req->callback = SvREFCNT_inc (cb_cv);
		817	req->pri = req_pri;
		818
		819	return req;
		820	}
		821
478	#define dREQ \	822	#define dREQ \
479	aio_req req; \	823	aio_req req = dreq (callback); \
		824
		825	#define REQ_SEND \
		826	PUTBACK; \
		827	req_submit (req); \
		828	SPAGAIN; \
480	\	829	\
481	if (SvOK (callback) && !SvROK (callback)) \	830	if (GIMME_V != G_VOID) \
482	croak ("clalback must be undef or of reference type"); \	831	XPUSHs (req_sv (req, aio_req_stash));
483	\	832
484	Newz (0, req, 1, aio_cb); \	833	ecb_inline void
485	if (!req) \	834	req_set_path (aio_req req, SV *path, SV **wdsv, SV **pathsv, eio_wd *wd, void **ptr)
486	croak ("out of memory during aio_req allocation"); \	835	{
487	\	836	if (expect_false (SvROK (path)))
488	req->callback = SvREFCNT_inc (callback);	837	{
489		838	SV *rv = SvRV (path);
		839	SV *wdob;
		840
		841	if (SvTYPE (rv) == SVt_PVAV && AvFILLp (rv) == 1)
		842	{
		843	path = AvARRAY (rv)[1];
		844	wdob = AvARRAY (rv)[0];
		845
		846	if (SvOK (wdob))
		847	{
		848	*wd = SvAIO_WD (wdob);
		849	*wdsv = SvREFCNT_inc_NN (SvRV (wdob));
		850	}
		851	else
		852	*wd = EIO_INVALID_WD;
		853	}
		854	else if (SvTYPE (rv) == SVt_PVMG && SvSTASH (rv) == aio_wd_stash)
		855	{
		856	*wd = (aio_wd)(long)SvIVX (rv);
		857	*wdsv = SvREFCNT_inc_NN (rv);
		858	*ptr = ".";
		859	return; /* path set to "." */
		860	}
		861	else
		862	croak ("IO::AIO: pathname arguments must be specified as a string, an IO::AIO::WD object or a [IO::AIO::WD, path] pair");
		863	}
		864
		865	*pathsv = newSVsv (path);
		866	*ptr = SvPVbyte_nolen (*pathsv);
		867	}
		868
		869	static void ecb_noinline
		870	req_set_path1 (aio_req req, SV *path)
		871	{
		872	req_set_path (req, path, &req->sv1, &req->sv3, &req->wd, &req->ptr1);
		873	}
		874
		875	static void ecb_noinline
		876	req_set_fh_or_path (aio_req req, int type_path, int type_fh, SV *fh_or_path)
		877	{
		878	SV *rv = SvROK (fh_or_path) ? SvRV (fh_or_path) : fh_or_path;
		879
		880	switch (SvTYPE (rv))
		881	{
		882	case SVt_PVIO:
		883	case SVt_PVLV:
		884	case SVt_PVGV:
		885	req->type = type_fh;
		886	req->sv1 = newSVsv (fh_or_path);
		887	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		888	break;
		889
		890	default:
		891	req->type = type_path;
		892	req_set_path1 (req, fh_or_path);
		893	break;
		894	}
		895	}
		896
		897	XS(boot_IO__AIO) ecb_cold;
		898
490	MODULE = IO::AIO PACKAGE = IO::AIO	899	MODULE = IO::AIO PACKAGE = IO::AIO
491		900
492	PROTOTYPES: ENABLE	901	PROTOTYPES: ENABLE
493		902
494	BOOT:	903	BOOT:
495	{	904	{
496	if (pipe (respipe))	905	static const struct {
497	croak ("unable to initialize result pipe");	906	const char *name;
		907	IV iv;
		908	} *civ, const_iv[] = {
		909	# define const_niv(name, value) { # name, (IV) value },
		910	# define const_iv(name) { # name, (IV) name },
		911	# define const_eio(name) { # name, (IV) EIO_ ## name },
498		912
499	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	913	/* you have to re-run ./gendef0 after adding/removing any constants here */
500	croak ("cannot set result pipe to nonblocking mode");	914	/* the first block can be undef if missing */
		915	const_iv (ENOSYS)
		916	const_iv (EXDEV)
		917	const_iv (EBADR)
501		918
502	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	919	/* for lseek */
503	croak ("cannot set result pipe to nonblocking mode");	920	const_iv (SEEK_DATA)
		921	const_iv (SEEK_HOLE)
504		922
505	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	923	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
506	}	924	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		925	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		926	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		927	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		928	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
507		929
		930	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		931	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		932	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		933	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		934	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		935
		936	/* the second block will be 0 when missing */
		937	const_iv (O_RDONLY)
		938	const_iv (O_WRONLY)
		939	const_iv (O_RDWR)
		940	const_iv (O_CREAT)
		941	const_iv (O_TRUNC)
		942	const_iv (O_EXCL)
		943	const_iv (O_APPEND)
		944
		945	const_iv (O_ASYNC)
		946	const_iv (O_DIRECT)
		947	const_iv (O_NOATIME)
		948
		949	const_iv (O_CLOEXEC)
		950	const_iv (O_NOCTTY)
		951	const_iv (O_NOFOLLOW)
		952	const_iv (O_NONBLOCK)
		953	const_iv (O_EXEC)
		954	const_iv (O_SEARCH)
		955	const_iv (O_DIRECTORY)
		956	const_iv (O_DSYNC)
		957	const_iv (O_RSYNC)
		958	const_iv (O_SYNC)
		959	const_iv (O_PATH)
		960	const_iv (O_TMPFILE)
		961	const_iv (O_TTY_INIT)
		962
		963	const_iv (S_IFIFO)
		964	const_iv (S_IFCHR)
		965	const_iv (S_IFBLK)
		966	const_iv (S_IFLNK)
		967	const_iv (S_IFREG)
		968	const_iv (S_IFDIR)
		969	const_iv (S_IFWHT)
		970	const_iv (S_IFSOCK)
		971	const_iv (S_IFMT)
		972
		973	const_iv (ST_RDONLY)
		974	const_iv (ST_NOSUID)
		975	const_iv (ST_NODEV)
		976	const_iv (ST_NOEXEC)
		977	const_iv (ST_SYNCHRONOUS)
		978	const_iv (ST_MANDLOCK)
		979	const_iv (ST_WRITE)
		980	const_iv (ST_APPEND)
		981	const_iv (ST_IMMUTABLE)
		982	const_iv (ST_NOATIME)
		983	const_iv (ST_NODIRATIME)
		984	const_iv (ST_RELATIME)
		985
		986	const_iv (PROT_NONE)
		987	const_iv (PROT_EXEC)
		988	const_iv (PROT_READ)
		989	const_iv (PROT_WRITE)
		990
		991	const_iv (MAP_PRIVATE)
		992	const_iv (MAP_SHARED)
		993	const_iv (MAP_FIXED)
		994	const_iv (MAP_ANONYMOUS)
		995
		996	/* linuxish */
		997	const_iv (MAP_LOCKED)
		998	const_iv (MAP_NORESERVE)
		999	const_iv (MAP_POPULATE)
		1000	const_iv (MAP_NONBLOCK)
		1001	const_iv (MAP_GROWSDOWN)
		1002	const_iv (MAP_32BIT)
		1003	const_iv (MAP_HUGETLB)
		1004	const_iv (MAP_STACK)
		1005
		1006	const_iv (F_DUPFD_CLOEXEC)
		1007
		1008	const_iv (F_OFD_GETLK)
		1009	const_iv (F_OFD_SETLK)
		1010	const_iv (F_OFD_GETLKW)
		1011
		1012	const_iv (FIFREEZE)
		1013	const_iv (FITHAW)
		1014	const_iv (FITRIM)
		1015	const_iv (FICLONE)
		1016	const_iv (FICLONERANGE)
		1017	const_iv (FIDEDUPERANGE)
		1018
		1019	const_iv (FS_IOC_GETFLAGS)
		1020	const_iv (FS_IOC_SETFLAGS)
		1021	const_iv (FS_IOC_GETVERSION)
		1022	const_iv (FS_IOC_SETVERSION)
		1023	const_iv (FS_IOC_FIEMAP)
		1024	const_iv (FS_IOC_FSGETXATTR)
		1025	const_iv (FS_IOC_FSSETXATTR)
		1026	const_iv (FS_IOC_SET_ENCRYPTION_POLICY)
		1027	const_iv (FS_IOC_GET_ENCRYPTION_PWSALT)
		1028	const_iv (FS_IOC_GET_ENCRYPTION_POLICY)
		1029
		1030	const_iv (FS_KEY_DESCRIPTOR_SIZE)
		1031
		1032	const_iv (FS_SECRM_FL)
		1033	const_iv (FS_UNRM_FL)
		1034	const_iv (FS_COMPR_FL)
		1035	const_iv (FS_SYNC_FL)
		1036	const_iv (FS_IMMUTABLE_FL)
		1037	const_iv (FS_APPEND_FL)
		1038	const_iv (FS_NODUMP_FL)
		1039	const_iv (FS_NOATIME_FL)
		1040	const_iv (FS_DIRTY_FL)
		1041	const_iv (FS_COMPRBLK_FL)
		1042	const_iv (FS_NOCOMP_FL)
		1043	const_iv (FS_ENCRYPT_FL)
		1044	const_iv (FS_BTREE_FL)
		1045	const_iv (FS_INDEX_FL)
		1046	const_iv (FS_JOURNAL_DATA_FL)
		1047	const_iv (FS_NOTAIL_FL)
		1048	const_iv (FS_DIRSYNC_FL)
		1049	const_iv (FS_TOPDIR_FL)
		1050	const_iv (FS_FL_USER_MODIFIABLE)
		1051
		1052	const_iv (FS_XFLAG_REALTIME)
		1053	const_iv (FS_XFLAG_PREALLOC)
		1054	const_iv (FS_XFLAG_IMMUTABLE)
		1055	const_iv (FS_XFLAG_APPEND)
		1056	const_iv (FS_XFLAG_SYNC)
		1057	const_iv (FS_XFLAG_NOATIME)
		1058	const_iv (FS_XFLAG_NODUMP)
		1059	const_iv (FS_XFLAG_RTINHERIT)
		1060	const_iv (FS_XFLAG_PROJINHERIT)
		1061	const_iv (FS_XFLAG_NOSYMLINKS)
		1062	const_iv (FS_XFLAG_EXTSIZE)
		1063	const_iv (FS_XFLAG_EXTSZINHERIT)
		1064	const_iv (FS_XFLAG_NODEFRAG)
		1065	const_iv (FS_XFLAG_FILESTREAM)
		1066	const_iv (FS_XFLAG_DAX)
		1067	const_iv (FS_XFLAG_HASATTR)
		1068
		1069	const_iv (FIEMAP_FLAG_SYNC)
		1070	const_iv (FIEMAP_FLAG_XATTR)
		1071	const_iv (FIEMAP_FLAGS_COMPAT)
		1072	const_iv (FIEMAP_EXTENT_LAST)
		1073	const_iv (FIEMAP_EXTENT_UNKNOWN)
		1074	const_iv (FIEMAP_EXTENT_DELALLOC)
		1075	const_iv (FIEMAP_EXTENT_ENCODED)
		1076	const_iv (FIEMAP_EXTENT_DATA_ENCRYPTED)
		1077	const_iv (FIEMAP_EXTENT_NOT_ALIGNED)
		1078	const_iv (FIEMAP_EXTENT_DATA_INLINE)
		1079	const_iv (FIEMAP_EXTENT_DATA_TAIL)
		1080	const_iv (FIEMAP_EXTENT_UNWRITTEN)
		1081	const_iv (FIEMAP_EXTENT_MERGED)
		1082	const_iv (FIEMAP_EXTENT_SHARED)
		1083
		1084	const_iv (SPLICE_F_MOVE)
		1085	const_iv (SPLICE_F_NONBLOCK)
		1086	const_iv (SPLICE_F_MORE)
		1087	const_iv (SPLICE_F_GIFT)
		1088
		1089	/* these are libeio constants, and are independent of gendef0 */
		1090	const_eio (SEEK_SET)
		1091	const_eio (SEEK_CUR)
		1092	const_eio (SEEK_END)
		1093
		1094	const_eio (MCL_FUTURE)
		1095	const_eio (MCL_CURRENT)
		1096
		1097	const_eio (MS_ASYNC)
		1098	const_eio (MS_INVALIDATE)
		1099	const_eio (MS_SYNC)
		1100
		1101	const_eio (MT_MODIFY)
		1102
		1103	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		1104	const_eio (SYNC_FILE_RANGE_WRITE)
		1105	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		1106
		1107	const_eio (FALLOC_FL_KEEP_SIZE)
		1108	const_eio (FALLOC_FL_PUNCH_HOLE)
		1109	const_eio (FALLOC_FL_COLLAPSE_RANGE)
		1110	const_eio (FALLOC_FL_ZERO_RANGE)
		1111	const_eio (FALLOC_FL_INSERT_RANGE)
		1112	const_eio (FALLOC_FL_UNSHARE_RANGE)
		1113
		1114	const_eio (RENAME_NOREPLACE)
		1115	const_eio (RENAME_EXCHANGE)
		1116	const_eio (RENAME_WHITEOUT)
		1117
		1118	const_eio (READDIR_DENTS)
		1119	const_eio (READDIR_DIRS_FIRST)
		1120	const_eio (READDIR_STAT_ORDER)
		1121	const_eio (READDIR_FOUND_UNKNOWN)
		1122
		1123	const_eio (DT_UNKNOWN)
		1124	const_eio (DT_FIFO)
		1125	const_eio (DT_CHR)
		1126	const_eio (DT_DIR)
		1127	const_eio (DT_BLK)
		1128	const_eio (DT_REG)
		1129	const_eio (DT_LNK)
		1130	const_eio (DT_SOCK)
		1131	const_eio (DT_WHT)
		1132	};
		1133
		1134	aio_stash = gv_stashpv ("IO::AIO" , 1);
		1135	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		1136	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
		1137	aio_wd_stash = gv_stashpv ("IO::AIO::WD" , 1);
		1138
		1139	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ > const_iv; civ--)
		1140	newCONSTSUB (aio_stash, (char *)civ[-1].name, newSViv (civ[-1].iv));
		1141
		1142	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		1143
		1144	reinit ();
		1145	}
		1146
508	void	1147	void
509	min_parallel(nthreads)	1148	reinit ()
510	int nthreads	1149	PROTOTYPE:
		1150
		1151	void
		1152	max_poll_reqs (unsigned int nreqs)
511	PROTOTYPE: $	1153	PROTOTYPE: $
		1154	CODE:
		1155	eio_set_max_poll_reqs (nreqs);
512		1156
513	void	1157	void
514	max_parallel(nthreads)	1158	max_poll_time (double nseconds)
515	int nthreads
516	PROTOTYPE: $	1159	PROTOTYPE: $
517
518	int
519	max_outstanding(nreqs)
520	int nreqs
521	PROTOTYPE: $
522	CODE:	1160	CODE:
523	RETVAL = max_outstanding;	1161	eio_set_max_poll_time (nseconds);
		1162
		1163	void
		1164	min_parallel (unsigned int nthreads)
		1165	PROTOTYPE: $
		1166	CODE:
		1167	eio_set_min_parallel (nthreads);
		1168
		1169	void
		1170	max_parallel (unsigned int nthreads)
		1171	PROTOTYPE: $
		1172	CODE:
		1173	eio_set_max_parallel (nthreads);
		1174
		1175	void
		1176	max_idle (unsigned int nthreads)
		1177	PROTOTYPE: $
		1178	CODE:
		1179	eio_set_max_idle (nthreads);
		1180
		1181	void
		1182	idle_timeout (unsigned int seconds)
		1183	PROTOTYPE: $
		1184	CODE:
		1185	eio_set_idle_timeout (seconds);
		1186
		1187	void
		1188	max_outstanding (unsigned int maxreqs)
		1189	PROTOTYPE: $
		1190	CODE:
524	max_outstanding = nreqs;	1191	max_outstanding = maxreqs;
525		1192
526	void	1193	void
527	aio_open(pathname,flags,mode,callback=&PL_sv_undef)	1194	aio_wd (SV8 *pathname, SV *callback = &PL_sv_undef)
528	SV * pathname
529	int flags
530	int mode
531	SV * callback
532	PROTOTYPE: $$$;$
533	CODE:	1195	PPCODE:
534	{	1196	{
535	dREQ;	1197	dREQ;
536		1198
		1199	req->type = EIO_WD_OPEN;
		1200	req_set_path1 (req, pathname);
		1201
		1202	REQ_SEND;
		1203	}
		1204
		1205	void
		1206	aio_open (SV8 *pathname, int flags, int mode, SV *callback = &PL_sv_undef)
		1207	PPCODE:
		1208	{
		1209	dREQ;
		1210
537	req->type = REQ_OPEN;	1211	req->type = EIO_OPEN;
538	req->data = newSVsv (pathname);	1212	req_set_path1 (req, pathname);
539	req->dataptr = SvPVbyte_nolen (req->data);
540	req->fd = flags;	1213	req->int1 = flags;
541	req->mode = mode;	1214	req->int2 = mode;
542		1215
543	send_req (req);	1216	REQ_SEND;
544	}	1217	}
545		1218
546	void	1219	void
547	aio_close(fh,callback=&PL_sv_undef)	1220	aio_fsync (SV *fh, SV *callback = &PL_sv_undef)
548	SV * fh
549	SV * callback
550	PROTOTYPE: $;$
551	ALIAS:	1221	ALIAS:
552	aio_close = REQ_CLOSE
553	aio_fsync = REQ_FSYNC	1222	aio_fsync = EIO_FSYNC
554	aio_fdatasync = REQ_FDATASYNC	1223	aio_fdatasync = EIO_FDATASYNC
		1224	aio_syncfs = EIO_SYNCFS
555	CODE:	1225	PPCODE:
556	{	1226	{
		1227	int fd = s_fileno_croak (fh, 0);
557	dREQ;	1228	dREQ;
558		1229
559	req->type = ix;	1230	req->type = ix;
560	req->fh = newSVsv (fh);	1231	req->sv1 = newSVsv (fh);
561	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1232	req->int1 = fd;
562		1233
563	send_req (req);	1234	REQ_SEND;
564	}	1235	}
565		1236
566	void	1237	void
		1238	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback = &PL_sv_undef)
		1239	PPCODE:
		1240	{
		1241	int fd = s_fileno_croak (fh, 0);
		1242	dREQ;
		1243
		1244	req->type = EIO_SYNC_FILE_RANGE;
		1245	req->sv1 = newSVsv (fh);
		1246	req->int1 = fd;
		1247	req->offs = offset;
		1248	req->size = nbytes;
		1249	req->int2 = flags;
		1250
		1251	REQ_SEND;
		1252	}
		1253
		1254	void
		1255	aio_allocate (SV *fh, int mode, off_t offset, size_t len, SV *callback = &PL_sv_undef)
		1256	PPCODE:
		1257	{
		1258	int fd = s_fileno_croak (fh, 0);
		1259	dREQ;
		1260
		1261	req->type = EIO_FALLOCATE;
		1262	req->sv1 = newSVsv (fh);
		1263	req->int1 = fd;
		1264	req->int2 = mode;
		1265	req->offs = offset;
		1266	req->size = len;
		1267
		1268	REQ_SEND;
		1269	}
		1270
		1271	void
		1272	aio_close (SV *fh, SV *callback = &PL_sv_undef)
		1273	PPCODE:
		1274	{
		1275	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1276	int fd = s_fileno_croak (fh, 0);
		1277	dREQ;
		1278
		1279	if (expect_false (close_fd < 0))
		1280	{
		1281	int pipefd [2];
		1282
		1283	if (
		1284	#ifdef _WIN32
		1285	_pipe (pipefd, 1, _O_BINARY) < 0
		1286	#else
		1287	pipe (pipefd) < 0
		1288	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0
		1289	#endif
		1290	|| close (pipefd [1]) < 0
		1291	)
		1292	abort (); /*D*/
		1293
		1294	close_fd = pipefd [0];
		1295	}
		1296
		1297	req->type = EIO_DUP2;
		1298	req->int1 = close_fd;
		1299	req->sv2 = newSVsv (fh);
		1300	req->int2 = fd;
		1301
		1302	REQ_SEND;
		1303	}
		1304
		1305	void
		1306	aio_seek (SV *fh, SV *offset, int whence, SV *callback = &PL_sv_undef)
		1307	PPCODE:
		1308	{
		1309	int fd = s_fileno_croak (fh, 0);
		1310	dREQ;
		1311
		1312	req->type = EIO_SEEK;
		1313	req->sv1 = newSVsv (fh);
		1314	req->int1 = fd;
		1315	req->offs = SvVAL64 (offset);
		1316	req->int2 = whence;
		1317
		1318	REQ_SEND;
		1319	}
		1320
		1321	void
567	aio_read(fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1322	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback = &PL_sv_undef)
568	SV * fh
569	UV offset
570	IV length
571	SV * data
572	IV dataoffset
573	SV * callback
574	ALIAS:	1323	ALIAS:
575	aio_read = REQ_READ	1324	aio_read = EIO_READ
576	aio_write = REQ_WRITE	1325	aio_write = EIO_WRITE
577	PROTOTYPE: $$$$$;$
578	CODE:	1326	PPCODE:
579	{	1327	{
580	aio_req req;
581	STRLEN svlen;	1328	STRLEN svlen;
		1329	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
582	char *svptr = SvPVbyte (data, svlen);	1330	char *svptr = SvPVbyte (data, svlen);
583		1331	UV len = SvUV (length);
584	SvUPGRADE (data, SVt_PV);
585	SvPOK_on (data);
586		1332
587	if (dataoffset < 0)	1333	if (dataoffset < 0)
588	dataoffset += svlen;	1334	dataoffset += svlen;
589		1335
590	if (dataoffset < 0 || dataoffset > svlen)	1336	if (dataoffset < 0 || dataoffset > svlen)
591	croak ("data offset outside of string");	1337	croak ("dataoffset outside of data scalar");
592		1338
593	if (ix == REQ_WRITE)	1339	if (ix == EIO_WRITE)
594	{	1340	{
595	/* write: check length and adjust. */	1341	/* write: check length and adjust. */
596	if (length < 0 || length + dataoffset > svlen)	1342	if (!SvOK (length) || len + dataoffset > svlen)
597	length = svlen - dataoffset;	1343	len = svlen - dataoffset;
598	}	1344	}
599	else	1345	else
600	{	1346	{
601	/* read: grow scalar as necessary */	1347	/* read: check type and grow scalar as necessary */
		1348	if (!SvPOK (data) || SvLEN (data) >= SvCUR (data))
602	svptr = SvGROW (data, length + dataoffset);	1349	svptr = sv_grow (data, len + dataoffset + 1);
		1350	else if (SvCUR (data) < len + dataoffset)
		1351	croak ("length + dataoffset outside of scalar, and cannot grow");
603	}	1352	}
604
605	if (length < 0)
606	croak ("length must not be negative");
607		1353
608	{	1354	{
609	dREQ;	1355	dREQ;
610		1356
611	req->type = ix;	1357	req->type = ix;
612	req->fh = newSVsv (fh);	1358	req->sv1 = newSVsv (fh);
613	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1359	req->int1 = fd;
614	: IoOFP (sv_2io (fh)));	1360	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
615	req->offset = offset;	1361	req->size = len;
616	req->length = length;
617	req->data = SvREFCNT_inc (data);	1362	req->sv2 = SvREFCNT_inc (data);
618	req->dataptr = (char *)svptr + dataoffset;	1363	req->ptr2 = (char *)svptr + dataoffset;
619	req->callback = SvREFCNT_inc (callback);	1364	req->stroffset = dataoffset;
620		1365
621	send_req (req);	1366	if (!SvREADONLY (data))
		1367	{
		1368	SvREADONLY_on (data);
		1369	req->flags |= FLAG_SV2_RO_OFF;
		1370	}
		1371
		1372	REQ_SEND;
622	}	1373	}
623	}	1374	}
624		1375
625	void	1376	void
626	aio_readahead(fh,offset,length,callback=&PL_sv_undef)	1377	aio_ioctl (SV *fh, unsigned long request, SV8 *arg, SV *callback = &PL_sv_undef)
627	SV * fh
628	UV offset
629	IV length
630	SV * callback
631	PROTOTYPE: $$$;$
632	CODE:
633	{
634	dREQ;
635
636	req->type = REQ_READAHEAD;
637	req->fh = newSVsv (fh);
638	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));
639	req->offset = offset;
640	req->length = length;
641
642	send_req (req);
643	}
644
645	void
646	aio_stat(fh_or_path,callback=&PL_sv_undef)
647	SV * fh_or_path
648	SV * callback
649	ALIAS:	1378	ALIAS:
650	aio_stat = REQ_STAT	1379	aio_ioctl = EIO_IOCTL
651	aio_lstat = REQ_LSTAT	1380	aio_fcntl = EIO_FCNTL
652	CODE:	1381	PPCODE:
653	{	1382	{
654	dREQ;	1383	int fd = s_fileno_croak (fh, 0);
		1384	char *svptr;
655		1385
656	New (0, req->statdata, 1, Stat_t);	1386	if (SvPOK (arg) || !SvNIOK (arg))
657	if (!req->statdata)
658	croak ("out of memory during aio_req->statdata allocation (sorry, i just leaked memory, too)");
659
660	if (SvPOK (fh_or_path))
661	{	1387	{
662	req->type = ix;	1388	STRLEN svlen;
663	req->data = newSVsv (fh_or_path);	1389	/* perl uses IOCPARM_LEN for fcntl, so we do, too */
664	req->dataptr = SvPVbyte_nolen (req->data);	1390	#ifdef IOCPARM_LEN
		1391	STRLEN need = IOCPARM_LEN (request);
		1392	#else
		1393	STRLEN need = 256;
		1394	#endif
		1395
		1396	if (svlen < need)
		1397	svptr = SvGROW (arg, need);
665	}	1398	}
666	else	1399	else
		1400	svptr = (char *)SvIV (arg);
		1401
667	{	1402	{
		1403	dREQ;
		1404
668	req->type = REQ_FSTAT;	1405	req->type = ix;
669	req->fh = newSVsv (fh_or_path);	1406	req->sv1 = newSVsv (fh);
670	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1407	req->int1 = fd;
		1408	req->int2 = (long)request;
		1409	req->sv2 = SvREFCNT_inc (arg);
		1410	req->ptr2 = svptr;
		1411
		1412	REQ_SEND;
671	}	1413	}
672
673	send_req (req);
674	}	1414	}
675		1415
676	void	1416	void
677	aio_unlink(pathname,callback=&PL_sv_undef)	1417	aio_readlink (SV8 *pathname, SV *callback = &PL_sv_undef)
678	SV * pathname
679	SV * callback
680	ALIAS:	1418	ALIAS:
681	aio_unlink = REQ_UNLINK	1419	aio_readlink = EIO_READLINK
682	aio_rmdir = REQ_RMDIR	1420	aio_realpath = EIO_REALPATH
		1421	PPCODE:
		1422	{
		1423	dREQ;
		1424
		1425	req->type = ix;
		1426	req_set_path1 (req, pathname);
		1427
		1428	REQ_SEND;
		1429	}
		1430
		1431	void
		1432	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback = &PL_sv_undef)
		1433	PPCODE:
		1434	{
		1435	int ifd = s_fileno_croak (in_fh , 0);
		1436	int ofd = s_fileno_croak (out_fh, 1);
		1437	dREQ;
		1438
		1439	req->type = EIO_SENDFILE;
		1440	req->sv1 = newSVsv (out_fh);
		1441	req->int1 = ofd;
		1442	req->sv2 = newSVsv (in_fh);
		1443	req->int2 = ifd;
		1444	req->offs = in_offset;
		1445	req->size = length;
		1446
		1447	REQ_SEND;
		1448	}
		1449
		1450	void
		1451	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback = &PL_sv_undef)
		1452	PPCODE:
		1453	{
		1454	int fd = s_fileno_croak (fh, 0);
		1455	dREQ;
		1456
		1457	req->type = EIO_READAHEAD;
		1458	req->sv1 = newSVsv (fh);
		1459	req->int1 = fd;
		1460	req->offs = offset;
		1461	req->size = length;
		1462
		1463	REQ_SEND;
		1464	}
		1465
		1466	void
		1467	aio_stat (SV8 *fh_or_path, SV *callback = &PL_sv_undef)
		1468	ALIAS:
		1469	aio_stat = EIO_STAT
		1470	aio_lstat = EIO_LSTAT
		1471	aio_statvfs = EIO_STATVFS
		1472	PPCODE:
		1473	{
		1474	dREQ;
		1475
		1476	req_set_fh_or_path (req, ix, ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT, fh_or_path);
		1477
		1478	REQ_SEND;
		1479	}
		1480
		1481	UV
		1482	major (UV dev)
		1483	ALIAS:
		1484	minor = 1
683	CODE:	1485	CODE:
		1486	RETVAL = ix ? minor (dev) : major (dev);
		1487	OUTPUT:
		1488	RETVAL
		1489
		1490	UV
		1491	makedev (UV maj, UV min)
		1492	CODE:
		1493	RETVAL = makedev (maj, min);
		1494	OUTPUT:
		1495	RETVAL
		1496
		1497	void
		1498	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback = &PL_sv_undef)
		1499	PPCODE:
		1500	{
		1501	dREQ;
		1502
		1503	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1504	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1505	req_set_fh_or_path (req, EIO_UTIME, EIO_FUTIME, fh_or_path);
		1506
		1507	REQ_SEND;
		1508	}
		1509
		1510	void
		1511	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback = &PL_sv_undef)
		1512	PPCODE:
		1513	{
		1514	dREQ;
		1515
		1516	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1517	req_set_fh_or_path (req, EIO_TRUNCATE, EIO_FTRUNCATE, fh_or_path);
		1518
		1519	REQ_SEND;
		1520	}
		1521
		1522	void
		1523	aio_chmod (SV8 *fh_or_path, int mode, SV *callback = &PL_sv_undef)
		1524	PPCODE:
		1525	{
		1526	dREQ;
		1527
		1528	req->int2 = mode;
		1529	req_set_fh_or_path (req, EIO_CHMOD, EIO_FCHMOD, fh_or_path);
		1530
		1531	REQ_SEND;
		1532	}
		1533
		1534	void
		1535	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback = &PL_sv_undef)
		1536	PPCODE:
		1537	{
		1538	dREQ;
		1539
		1540	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1541	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1542	req_set_fh_or_path (req, EIO_CHOWN, EIO_FCHOWN, fh_or_path);
		1543
		1544	REQ_SEND;
		1545	}
		1546
		1547	void
		1548	aio_readdirx (SV8 *pathname, IV flags, SV *callback = &PL_sv_undef)
		1549	PPCODE:
		1550	{
		1551	dREQ;
		1552
		1553	req->type = EIO_READDIR;
		1554	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1555
		1556	if (flags & EIO_READDIR_DENTS)
		1557	req->int1 |= EIO_READDIR_CUSTOM2;
		1558
		1559	req_set_path1 (req, pathname);
		1560
		1561	REQ_SEND;
		1562	}
		1563
		1564	void
		1565	aio_mkdir (SV8 *pathname, int mode, SV *callback = &PL_sv_undef)
		1566	PPCODE:
		1567	{
		1568	dREQ;
		1569
		1570	req->type = EIO_MKDIR;
		1571	req->int2 = mode;
		1572	req_set_path1 (req, pathname);
		1573
		1574	REQ_SEND;
		1575	}
		1576
		1577	void
		1578	aio_unlink (SV8 *pathname, SV *callback = &PL_sv_undef)
		1579	ALIAS:
		1580	aio_unlink = EIO_UNLINK
		1581	aio_rmdir = EIO_RMDIR
		1582	aio_readdir = EIO_READDIR
		1583	PPCODE:
684	{	1584	{
685	dREQ;	1585	dREQ;
686		1586
687	req->type = ix;	1587	req->type = ix;
688	req->data = newSVsv (pathname);	1588	req_set_path1 (req, pathname);
689	req->dataptr = SvPVbyte_nolen (req->data);
690
691	send_req (req);
692	}
693		1589
		1590	REQ_SEND;
		1591	}
		1592
694	void	1593	void
695	aio_symlink(oldpath,newpath,callback=&PL_sv_undef)	1594	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback = &PL_sv_undef)
696	SV * oldpath	1595	ALIAS:
697	SV * newpath	1596	aio_link = EIO_LINK
698	SV * callback	1597	aio_symlink = EIO_SYMLINK
		1598	aio_rename = EIO_RENAME
699	CODE:	1599	PPCODE:
700	{	1600	{
		1601	eio_wd wd2 = 0;
701	dREQ;	1602	dREQ;
702		1603
703	req->type = REQ_SYMLINK;	1604	req->type = ix;
704	req->fh = newSVsv (oldpath);	1605	req_set_path1 (req, oldpath);
705	req->data2ptr = SvPVbyte_nolen (req->fh);	1606	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
706	req->data = newSVsv (newpath);	1607	req->int3 = (long)wd2;
707	req->dataptr = SvPVbyte_nolen (req->data);
708		1608
709	send_req (req);	1609	REQ_SEND;
710	}	1610	}
711		1611
712	void	1612	void
713	flush()	1613	aio_rename2 (SV8 *oldpath, SV8 *newpath, int flags = 0, SV *callback = &PL_sv_undef)
714	PROTOTYPE:	1614	PPCODE:
		1615	{
		1616	eio_wd wd2 = 0;
		1617	dREQ;
		1618
		1619	req->type = EIO_RENAME;
		1620	req_set_path1 (req, oldpath);
		1621	req_set_path (req, newpath, &req->sv2, &req->sv4, &wd2, &req->ptr2);
		1622	req->int2 = flags;
		1623	req->int3 = (long)wd2;
		1624
		1625	REQ_SEND;
		1626	}
		1627
		1628	void
		1629	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback = &PL_sv_undef)
		1630	PPCODE:
		1631	{
		1632	dREQ;
		1633
		1634	req->type = EIO_MKNOD;
		1635	req->int2 = (mode_t)mode;
		1636	req->offs = dev;
		1637	req_set_path1 (req, pathname);
		1638
		1639	REQ_SEND;
		1640	}
		1641
		1642	void
		1643	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = -1, SV *callback = &PL_sv_undef)
		1644	ALIAS:
		1645	aio_mtouch = EIO_MTOUCH
		1646	aio_msync = EIO_MSYNC
		1647	PPCODE:
		1648	{
		1649	STRLEN svlen;
		1650	char *svptr = SvPVbyte (data, svlen);
		1651	UV len = SvUV (length);
		1652
		1653	if (flags < 0)
		1654	flags = ix == EIO_MSYNC ? EIO_MS_SYNC : 0;
		1655
		1656	if (offset < 0)
		1657	offset += svlen;
		1658
		1659	if (offset < 0 || offset > svlen)
		1660	croak ("offset outside of scalar");
		1661
		1662	if (!SvOK (length) || len + offset > svlen)
		1663	len = svlen - offset;
		1664
		1665	{
		1666	dREQ;
		1667
		1668	req->type = ix;
		1669	req->sv2 = SvREFCNT_inc (data);
		1670	req->ptr2 = (char *)svptr + offset;
		1671	req->size = len;
		1672	req->int1 = flags;
		1673
		1674	REQ_SEND;
		1675	}
		1676	}
		1677
		1678	void
		1679	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback = &PL_sv_undef)
		1680	PPCODE:
		1681	{
		1682	STRLEN svlen;
		1683	char *svptr = SvPVbyte (data, svlen);
		1684	UV len = SvUV (length);
		1685
		1686	if (offset < 0)
		1687	offset += svlen;
		1688
		1689	if (offset < 0 || offset > svlen)
		1690	croak ("offset outside of scalar");
		1691
		1692	if (!SvOK (length) || len + offset > svlen)
		1693	len = svlen - offset;
		1694
		1695	{
		1696	dREQ;
		1697
		1698	req->type = EIO_MLOCK;
		1699	req->sv2 = SvREFCNT_inc (data);
		1700	req->ptr2 = (char *)svptr + offset;
		1701	req->size = len;
		1702
		1703	REQ_SEND;
		1704	}
		1705	}
		1706
		1707	void
		1708	aio_mlockall (IV flags, SV *callback = &PL_sv_undef)
		1709	PPCODE:
		1710	{
		1711	dREQ;
		1712
		1713	req->type = EIO_MLOCKALL;
		1714	req->int1 = flags;
		1715
		1716	REQ_SEND;
		1717	}
		1718
		1719	void
		1720	aio_fiemap (SV *fh, off_t start, SV *length, U32 flags, SV *count, SV *callback = &PL_sv_undef)
		1721	PPCODE:
		1722	{
		1723	int fd = s_fileno_croak (fh, 0);
		1724	dREQ;
		1725
		1726	req->type = EIO_CUSTOM;
		1727	req->sv1 = newSVsv (fh);
		1728	req->int1 = fd;
		1729
		1730	req->feed = fiemap;
		1731	#if HAVE_FIEMAP
		1732	/* keep our fingers crossed that the next two types are 64 bit */
		1733	req->offs = start;
		1734	req->size = SvOK (length) ? SvVAL64 (length) : ~0ULL;
		1735	req->int2 = flags;
		1736	req->int3 = SvOK (count) ? SvIV (count) : -1;
		1737	#endif
		1738
		1739	REQ_SEND;
		1740	}
		1741
		1742	void
		1743	aio_busy (double delay, SV *callback = &PL_sv_undef)
		1744	PPCODE:
		1745	{
		1746	dREQ;
		1747
		1748	req->type = EIO_BUSY;
		1749	req->nv1 = delay < 0. ? 0. : delay;
		1750
		1751	REQ_SEND;
		1752	}
		1753
		1754	void
		1755	aio_group (SV *callback = &PL_sv_undef)
		1756	PPCODE:
		1757	{
		1758	dREQ;
		1759
		1760	req->type = EIO_GROUP;
		1761
		1762	PUTBACK;
		1763	req_submit (req);
		1764	SPAGAIN;
		1765
		1766	XPUSHs (req_sv (req, aio_grp_stash));
		1767	}
		1768
		1769	void
		1770	aio_nop (SV *callback = &PL_sv_undef)
		1771	ALIAS:
		1772	aio_nop = EIO_NOP
		1773	aio_sync = EIO_SYNC
		1774	PPCODE:
		1775	{
		1776	dREQ;
		1777
		1778	req->type = ix;
		1779
		1780	REQ_SEND;
		1781	}
		1782
		1783	int
		1784	aioreq_pri (int pri = NO_INIT)
715	CODE:	1785	CODE:
		1786	RETVAL = next_pri;
		1787	if (items > 0)
		1788	{
		1789	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1790	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1791	next_pri = pri;
		1792	}
		1793	OUTPUT:
		1794	RETVAL
		1795
		1796	void
		1797	aioreq_nice (int nice = 0)
		1798	CODE:
		1799	nice = next_pri - nice;
		1800	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1801	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1802	next_pri = nice;
		1803
		1804	void
		1805	flush ()
		1806	CODE:
716	while (nreqs)	1807	while (eio_nreqs ())
717	{	1808	{
718	poll_wait ();	1809	poll_wait ();
719	poll_cb ();	1810	poll_cb ();
720	}	1811	}
721		1812
722	void	1813	int
723	poll()	1814	poll ()
724	PROTOTYPE:
725	CODE:	1815	CODE:
726	if (nreqs)
727	{
728	poll_wait ();	1816	poll_wait ();
729	poll_cb ();	1817	RETVAL = poll_cb ();
730	}
731
732	int
733	poll_fileno()
734	PROTOTYPE:
735	CODE:
736	RETVAL = respipe [0];
737	OUTPUT:	1818	OUTPUT:
738	RETVAL	1819	RETVAL
739		1820
740	int	1821	int
		1822	poll_fileno ()
		1823	CODE:
		1824	RETVAL = s_epipe_fd (&respipe);
		1825	OUTPUT:
		1826	RETVAL
		1827
		1828	int
741	poll_cb(...)	1829	poll_cb (...)
742	PROTOTYPE:	1830	PROTOTYPE:
743	CODE:	1831	CODE:
744	RETVAL = poll_cb ();	1832	RETVAL = poll_cb ();
745	OUTPUT:	1833	OUTPUT:
746	RETVAL	1834	RETVAL
747		1835
748	void	1836	void
749	poll_wait()	1837	poll_wait ()
750	PROTOTYPE:
751	CODE:	1838	CODE:
752	if (nreqs)
753	poll_wait ();	1839	poll_wait ();
754		1840
755	int	1841	int
756	nreqs()	1842	nreqs ()
757	PROTOTYPE:
758	CODE:	1843	CODE:
759	RETVAL = nreqs;	1844	RETVAL = eio_nreqs ();
760	OUTPUT:	1845	OUTPUT:
761	RETVAL	1846	RETVAL
762		1847
		1848	int
		1849	nready ()
		1850	CODE:
		1851	RETVAL = eio_nready ();
		1852	OUTPUT:
		1853	RETVAL
		1854
		1855	int
		1856	npending ()
		1857	CODE:
		1858	RETVAL = eio_npending ();
		1859	OUTPUT:
		1860	RETVAL
		1861
		1862	int
		1863	nthreads ()
		1864	CODE:
		1865	RETVAL = eio_nthreads ();
		1866	OUTPUT:
		1867	RETVAL
		1868
		1869	int
		1870	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1871	CODE:
		1872	RETVAL = posix_fadvise (fh, offset, length, advice);
		1873	OUTPUT:
		1874	RETVAL
		1875
		1876	IV
		1877	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1878	CODE:
		1879	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1880	OUTPUT:
		1881	RETVAL
		1882
		1883	void
		1884	mmap (SV *scalar, STRLEN length, int prot, int flags, SV *fh = &PL_sv_undef, off_t offset = 0)
		1885	PPCODE:
		1886	sv_unmagic (scalar, MMAP_MAGIC);
		1887	{
		1888	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1889	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1890	if (addr == (void *)-1)
		1891	XSRETURN_NO;
		1892
		1893	sv_force_normal (scalar);
		1894
		1895	/* we store the length in mg_obj, as namlen is I32 :/ */
		1896	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1897	->mg_obj = (SV *)length;
		1898
		1899	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1900
		1901	if (!(prot & PROT_WRITE))
		1902	SvREADONLY_on (scalar);
		1903
		1904	if (SvLEN (scalar))
		1905	Safefree (SvPVX (scalar));
		1906
		1907	SvPVX (scalar) = (char *)addr;
		1908	SvCUR_set (scalar, length);
		1909	SvLEN_set (scalar, 0);
		1910	SvPOK_only (scalar);
		1911
		1912	XSRETURN_YES;
		1913	}
		1914
		1915	void
		1916	munmap (SV *scalar)
		1917	CODE:
		1918	sv_unmagic (scalar, MMAP_MAGIC);
		1919
		1920	int
		1921	madvise (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1922	ALIAS:
		1923	mprotect = 1
		1924	CODE:
		1925	{
		1926	STRLEN svlen;
		1927	void *addr = SvPVbyte (scalar, svlen);
		1928	STRLEN len = SvUV (length);
		1929
		1930	if (offset < 0)
		1931	offset += svlen;
		1932
		1933	if (offset < 0 || offset > svlen)
		1934	croak ("offset outside of scalar");
		1935
		1936	if (!SvOK (length) || len + offset > svlen)
		1937	len = svlen - offset;
		1938
		1939	addr = (void *)(((intptr_t)addr) + offset);
		1940	eio_page_align (&addr, &len);
		1941
		1942	switch (ix)
		1943	{
		1944	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1945	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1946	}
		1947	}
		1948	OUTPUT:
		1949	RETVAL
		1950
		1951	int
		1952	munlock (SV *scalar, STRLEN offset = 0, SV *length = &PL_sv_undef)
		1953	CODE:
		1954	{
		1955	STRLEN svlen;
		1956	void *addr = SvPVbyte (scalar, svlen);
		1957	size_t len = SvUV (length);
		1958
		1959	if (offset < 0)
		1960	offset += svlen;
		1961
		1962	if (offset < 0 || offset > svlen)
		1963	croak ("offset outside of scalar");
		1964
		1965	if (!SvOK (length) || len + offset > svlen)
		1966	len = svlen - offset;
		1967
		1968	addr = (void *)(((intptr_t)addr) + offset);
		1969	eio_page_align (&addr, &len);
		1970	#if _POSIX_MEMLOCK_RANGE
		1971	RETVAL = munlock (addr, len);
		1972	#else
		1973	RETVAL = EIO_ENOSYS ();
		1974	#endif
		1975	}
		1976	OUTPUT:
		1977	RETVAL
		1978
		1979	int
		1980	munlockall ()
		1981	CODE:
		1982	#if _POSIX_MEMLOCK
		1983	munlockall ();
		1984	#else
		1985	RETVAL = EIO_ENOSYS ();
		1986	#endif
		1987	OUTPUT:
		1988	RETVAL
		1989
		1990	int
		1991	splice (aio_rfd rfh, SV *off_in, aio_wfd wfh, SV *off_out, size_t length, unsigned int flags)
		1992	CODE:
		1993	{
		1994	#if HAVE_LINUX_SPLICE
		1995	loff_t off_in_, off_out_;
		1996	RETVAL = splice (
		1997	rfh, SvOK (off_in ) ? (off_in_ = SvVAL64 (off_in )), &off_in_ : 0,
		1998	wfh, SvOK (off_out) ? (off_out_ = SvVAL64 (off_out)), &off_out_ : 0,
		1999	length, flags
		2000	);
		2001	#else
		2002	RETVAL = EIO_ENOSYS ();
		2003	#endif
		2004	}
		2005	OUTPUT:
		2006	RETVAL
		2007
		2008	int
		2009	tee (aio_rfd rfh, aio_wfd wfh, size_t length, unsigned int flags)
		2010	CODE:
		2011	#if HAVE_LINUX_SPLICE
		2012	RETVAL = tee (rfh, wfh, length, flags);
		2013	#else
		2014	RETVAL = EIO_ENOSYS ();
		2015	#endif
		2016	OUTPUT:
		2017	RETVAL
		2018
		2019	int
		2020	pipesize (aio_rfd rfh, int new_size = -1)
		2021	PROTOTYPE: $;$
		2022	CODE:
		2023	#if defined(F_SETPIPE_SZ) && defined(F_GETPIPE_SZ)
		2024	if (new_size >= 0)
		2025	RETVAL = fcntl (rfh, F_SETPIPE_SZ, new_size);
		2026	else
		2027	RETVAL = fcntl (rfh, F_GETPIPE_SZ);
		2028	#else
		2029	errno = ENOSYS;
		2030	RETVAL = -1;
		2031	#endif
		2032	OUTPUT:
		2033	RETVAL
		2034
		2035	void
		2036	pipe2 (int flags = 0)
		2037	PROTOTYPE: ;$
		2038	PPCODE:
		2039	{
		2040	int fd[2];
		2041	int res;
		2042
		2043	if (flags)
		2044	#if HAVE_PIPE2
		2045	res = pipe2 (fd, flags);
		2046	#else
		2047	res = (errno = ENOSYS, -1);
		2048	#endif
		2049	else
		2050	res = pipe (fd);
		2051
		2052	if (!res)
		2053	{
		2054	EXTEND (SP, 2);
		2055	PUSHs (newmortalFH (fd[0], O_RDONLY));
		2056	PUSHs (newmortalFH (fd[1], O_WRONLY));
		2057	}
		2058	}
		2059
		2060	UV
		2061	get_fdlimit ()
		2062	CODE:
		2063	#if HAVE_RLIMITS
		2064	struct rlimit rl;
		2065	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2066	XSRETURN_UV (rl.rlim_cur == RLIM_INFINITY ? (UV)-1 : rl.rlim_cur);
		2067	#endif
		2068	XSRETURN_UNDEF;
		2069	OUTPUT:
		2070	RETVAL
		2071
		2072	void
		2073	min_fdlimit (UV limit = 0x7fffffffU)
		2074	CODE:
		2075	{
		2076	#if HAVE_RLIMITS
		2077	struct rlimit rl;
		2078	rlim_t orig_rlim_max;
		2079	UV bit;
		2080
		2081	if (0 != getrlimit (RLIMIT_NOFILE, &rl))
		2082	goto fail;
		2083
		2084	if (rl.rlim_cur == RLIM_INFINITY)
		2085	XSRETURN_YES;
		2086
		2087	orig_rlim_max = rl.rlim_max == RLIM_INFINITY ? ((rlim_t)0)-1 : rl.rlim_max;
		2088
		2089	if (rl.rlim_cur < limit)
		2090	{
		2091	rl.rlim_cur = limit;
		2092
		2093	if (rl.rlim_max < rl.rlim_cur && rl.rlim_max != RLIM_INFINITY)
		2094	rl.rlim_max = rl.rlim_cur;
		2095	}
		2096
		2097	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2098	XSRETURN_YES;
		2099
		2100	if (errno == EPERM)
		2101	{
		2102	/* setlimit failed with EPERM - maybe we can't raise the hardlimit, or maybe */
		2103	/* our limit overflows a system-wide limit */
		2104	/* try an adaptive algorithm, but do not lower the hardlimit */
		2105	rl.rlim_max = 0;
		2106	for (bit = 0x40000000U; bit; bit >>= 1)
		2107	{
		2108	rl.rlim_max |= bit;
		2109	rl.rlim_cur = rl.rlim_max;
		2110
		2111	/* nevr decrease the hard limit */
		2112	if (rl.rlim_max < orig_rlim_max)
		2113	break;
		2114
		2115	if (0 != setrlimit (RLIMIT_NOFILE, &rl))
		2116	rl.rlim_max &= ~bit; /* too high, remove bit again */
		2117	}
		2118
		2119	/* now, raise the soft limit to the max permitted */
		2120	if (0 == getrlimit (RLIMIT_NOFILE, &rl))
		2121	{
		2122	rl.rlim_cur = rl.rlim_max;
		2123	if (0 == setrlimit (RLIMIT_NOFILE, &rl))
		2124	errno = EPERM;
		2125	}
		2126	}
		2127	#endif
		2128	fail:
		2129	XSRETURN_UNDEF;
		2130	}
		2131
		2132	void _on_next_submit (SV *cb)
		2133	CODE:
		2134	SvREFCNT_dec (on_next_submit);
		2135	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		2136
		2137	PROTOTYPES: DISABLE
		2138
		2139	MODULE = IO::AIO PACKAGE = IO::AIO::WD
		2140
		2141	BOOT:
		2142	{
		2143	newCONSTSUB (aio_stash, "CWD" , newSVaio_wd (EIO_CWD ));
		2144	newCONSTSUB (aio_stash, "INVALID_WD", newSVaio_wd (EIO_INVALID_WD));
		2145	}
		2146
		2147	void
		2148	DESTROY (SV *self)
		2149	CODE:
		2150	{
		2151	aio_wd wd = SvAIO_WD (self);
		2152	#if HAVE_AT
		2153	{
		2154	SV *callback = &PL_sv_undef;
		2155	dREQ; /* clobbers next_pri :/ */
		2156	next_pri = req->pri; /* restore next_pri */
		2157	req->pri = EIO_PRI_MAX; /* better use max. priority to conserve fds */
		2158	req->type = EIO_WD_CLOSE;
		2159	req->wd = wd;
		2160	REQ_SEND;
		2161	}
		2162	#else
		2163	eio_wd_close_sync (wd);
		2164	#endif
		2165	}
		2166
		2167	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		2168
		2169	void
		2170	cancel (aio_req_ornot req)
		2171	CODE:
		2172	eio_cancel (req);
		2173
		2174	void
		2175	cb (aio_req_ornot req, SV *callback = NO_INIT)
		2176	PPCODE:
		2177	{
		2178	if (GIMME_V != G_VOID)
		2179	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		2180
		2181	if (items > 1)
		2182	{
		2183	SV *cb_cv = get_cb (callback);
		2184
		2185	SvREFCNT_dec (req->callback);
		2186	req->callback = SvREFCNT_inc (cb_cv);
		2187	}
		2188	}
		2189
		2190	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		2191
		2192	void
		2193	add (aio_req grp, ...)
		2194	PPCODE:
		2195	{
		2196	int i;
		2197
		2198	if (grp->int1 == 2)
		2199	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		2200
		2201	for (i = 1; i < items; ++i )
		2202	{
		2203	aio_req req;
		2204
		2205	if (GIMME_V != G_VOID)
		2206	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		2207
		2208	req = SvAIO_REQ (ST (i));
		2209
		2210	if (req)
		2211	eio_grp_add (grp, req);
		2212	}
		2213	}
		2214
		2215	void
		2216	cancel_subs (aio_req_ornot req)
		2217	CODE:
		2218	req_cancel_subs (req);
		2219
		2220	void
		2221	result (aio_req grp, ...)
		2222	CODE:
		2223	{
		2224	int i;
		2225	AV *av;
		2226
		2227	grp->errorno = errno;
		2228
		2229	av = newAV ();
		2230	av_extend (av, items - 1);
		2231
		2232	for (i = 1; i < items; ++i )
		2233	av_push (av, newSVsv (ST (i)));
		2234
		2235	SvREFCNT_dec (grp->sv1);
		2236	grp->sv1 = (SV *)av;
		2237	}
		2238
		2239	void
		2240	errno (aio_req grp, int errorno = errno)
		2241	CODE:
		2242	grp->errorno = errorno;
		2243
		2244	void
		2245	limit (aio_req grp, int limit)
		2246	CODE:
		2247	eio_grp_limit (grp, limit);
		2248
		2249	void
		2250	feed (aio_req grp, SV *callback = &PL_sv_undef)
		2251	CODE:
		2252	{
		2253	SvREFCNT_dec (grp->sv2);
		2254	grp->sv2 = newSVsv (callback);
		2255	grp->feed = aio_grp_feed;
		2256
		2257	if (grp->int2 <= 0)
		2258	grp->int2 = 2;
		2259
		2260	eio_grp_limit (grp, grp->int2);
		2261	}
		2262

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