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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.70 by root, Tue Oct 24 15:15:56 2006 UTC vs.
Revision 1.187 by root, Sat Jul 16 16:46:10 2011 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"	9	#include "schmorp.h"
17
18	#include <pthread.h>
19		10
20	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
21	#include <errno.h>	13	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	14	#include <sys/types.h>
25	#include <sys/stat.h>	15	#include <sys/stat.h>
26	#include <limits.h>	16	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	17	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	18	#include <sched.h>
31		19
32	#if HAVE_SENDFILE	20	#if _POSIX_MEMLOCK || _POSIX_MEMLOCK_RANGE || _POSIX_MAPPED_FILES
33	# if __linux
34	# include <sys/sendfile.h>	21	# include <sys/mman.h>
35	# elif __freebsd	22	#endif
36	# include <sys/socket.h>	23
		24	/* perl namespace pollution */
		25	#undef VERSION
		26
		27	/* perl stupidly overrides readdir and maybe others */
		28	/* with thread-unsafe versions, imagine that :( */
		29	#undef readdir
		30	#undef opendir
		31	#undef closedir
		32
		33	#ifdef _WIN32
		34
		35	# define EIO_STRUCT_DIRENT Direntry_t
		36	# undef malloc
		37	# undef free
		38
		39	// perl overrides all those nice win32 functions
		40	# undef open
		41	# undef read
		42	# undef write
		43	# undef send
		44	# undef recv
		45	# undef lstat
		46	# undef truncate
		47	# undef ftruncate
		48	# undef open
		49	# undef link
		50	# undef close
		51	# undef unlink
		52	# undef mkdir
		53	# undef rmdir
		54	# undef rename
		55	# undef lseek
		56	# undef opendir
		57	# undef readdir
		58	# undef closedir
		59	# undef chmod
		60	# undef fchmod
		61
		62	# define opendir(fd) EIO_ERRNO (ENOSYS, 0)
		63	# define readdir(fd) EIO_ENOSYS ()
		64	# define closedir(fd) EIO_ENOSYS ()
		65
		66	#else
		67
37	# include <sys/uio.h>	68	# include <sys/time.h>
38	# elif __hpux
39	# include <sys/socket.h>
40	# elif __solaris /* not yet */
41	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73
		74	#endif
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define VAL64 IV
		81	# define SvVAL64 SvIV
		82	# define newSVval64 newSViv
		83	#else
		84	# define VAL64 NV
		85	# define SvVAL64 SvNV
		86	# define newSVval64 newSVnv
		87	#endif
		88
		89	/*****************************************************************************/
		90
		91	#if __GNUC__ >= 3
		92	# define expect(expr,value) __builtin_expect ((expr),(value))
		93	#else
		94	# define expect(expr,value) (expr)
		95	#endif
		96
		97	#define expect_false(expr) expect ((expr) != 0, 0)
		98	#define expect_true(expr) expect ((expr) != 0, 1)
		99
		100	/*****************************************************************************/
		101
		102	typedef SV SV8; /* byte-sv, used for argument-checking */
		103	typedef int aio_rfd; /* read file desriptor */
		104	typedef int aio_wfd; /* write file descriptor */
		105
		106	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		107
		108	#define EIO_REQ_MEMBERS \
		109	SV *callback; \
		110	SV *sv1, *sv2; \
		111	STRLEN stroffset; \
		112	SV *self;
		113
		114	#define EIO_NO_WRAPPERS 1
		115
		116	#include "libeio/config.h"
		117	#include "libeio/eio.h"
		118
		119	/* Linux/others */
		120	#ifndef O_ASYNC
		121	# define O_ASYNC 0
		122	#endif
		123	#ifndef O_DIRECT
		124	# define O_DIRECT 0
		125	#endif
		126	#ifndef O_NOATIME
		127	# define O_NOATIME 0
		128	#endif
		129
		130	/* POSIX */
		131	#ifndef O_CLOEXEC
		132	# define O_CLOEXEC 0
		133	#endif
		134	#ifndef O_NOFOLLOW
		135	# define O_NOFOLLOW 0
		136	#endif
		137	#ifndef O_NOCTTY
		138	# define O_NOCTTY 0
		139	#endif
		140	#ifndef O_NONBLOCK
		141	# define O_NONBLOCK 0
		142	#endif
		143	#ifndef O_EXEC
		144	# define O_EXEC 0
		145	#endif
		146	#ifndef O_SEARCH
		147	# define O_SEARCH 0
		148	#endif
		149	#ifndef O_DIRECTORY
		150	# define O_DIRECTORY 0
		151	#endif
		152	#ifndef O_DSYNC
		153	# define O_DSYNC 0
		154	#endif
		155	#ifndef O_RSYNC
		156	# define O_RSYNC 0
		157	#endif
		158	#ifndef O_SYNC
		159	# define O_SYNC 0
		160	#endif
		161	#ifndef O_TTY_INIT
		162	# define O_TTY_INIT 0
		163	#endif
		164
		165	#ifndef POSIX_FADV_NORMAL
		166	# define POSIX_FADV_NORMAL 0
		167	#endif
		168	#ifndef POSIX_FADV_SEQUENTIAL
		169	# define POSIX_FADV_SEQUENTIAL 0
		170	#endif
		171	#ifndef POSIX_FADV_RANDOM
		172	# define POSIX_FADV_RANDOM 0
		173	#endif
		174	#ifndef POSIX_FADV_NOREUSE
		175	# define POSIX_FADV_NOREUSE 0
		176	#endif
		177	#ifndef POSIX_FADV_WILLNEED
		178	# define POSIX_FADV_WILLNEED 0
		179	#endif
		180	#ifndef POSIX_FADV_DONTNEED
		181	# define POSIX_FADV_DONTNEED 0
		182	#endif
		183
		184	#if !HAVE_POSIX_FADVISE
		185	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		186	#endif
		187
		188	#ifndef POSIX_MADV_NORMAL
		189	# define POSIX_MADV_NORMAL 0
		190	#endif
		191	#ifndef POSIX_MADV_SEQUENTIAL
		192	# define POSIX_MADV_SEQUENTIAL 0
		193	#endif
		194	#ifndef POSIX_MADV_RANDOM
		195	# define POSIX_MADV_RANDOM 0
		196	#endif
		197	#ifndef POSIX_MADV_WILLNEED
		198	# define POSIX_MADV_WILLNEED 0
		199	#endif
		200	#ifndef POSIX_MADV_DONTNEED
		201	# define POSIX_MADV_DONTNEED 0
		202	#endif
		203
		204	#if !HAVE_POSIX_MADVISE
		205	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		206	#endif
		207
		208	#ifndef PROT_NONE
		209	# define PROT_NONE 0
		210	#endif
		211	#ifndef PROT_READ
		212	# define PROT_READ 0
		213	#endif
		214	#ifndef PROT_WRITE
		215	# define PROT_READ 0
		216	#endif
		217	#ifndef PROT_EXEC
		218	# define PROT_EXEC 0
		219	#endif
		220
		221	#ifndef ST_RDONLY
		222	# define ST_RDONLY 0
		223	#endif
		224	#ifndef ST_NOSUID
		225	# define ST_NOSUID 0
		226	#endif
		227	#ifndef ST_NODEV
		228	# define ST_NODEV 0
		229	#endif
		230	#ifndef ST_NOEXEC
		231	# define ST_NOEXEC 0
		232	#endif
		233	#ifndef ST_SYNCHRONOUS
		234	# define ST_SYNCHRONOUS 0
		235	#endif
		236	#ifndef ST_MANDLOCK
		237	# define ST_MANDLOCK 0
		238	#endif
		239	#ifndef ST_WRITE
		240	# define ST_WRITE 0
		241	#endif
		242	#ifndef ST_APPEND
		243	# define ST_APPEND 0
		244	#endif
		245	#ifndef ST_IMMUTABLE
		246	# define ST_IMMUTABLE 0
		247	#endif
		248	#ifndef ST_NOATIME
		249	# define ST_NOATIME 0
		250	#endif
		251	#ifndef ST_NODIRATIME
		252	# define ST_NODIRATIME 0
		253	#endif
		254	#ifndef ST_RELATIME
		255	# define ST_RELATIME 0
		256	#endif
		257
		258	#ifndef S_IFIFO
		259	# define S_IFIFO 0
		260	#endif
		261	#ifndef S_IFCHR
		262	# define S_IFCHR 0
		263	#endif
		264	#ifndef S_IFBLK
		265	# define S_IFBLK 0
		266	#endif
		267	#ifndef S_IFLNK
		268	# define S_IFLNK 0
		269	#endif
		270	#ifndef S_IFREG
		271	# define S_IFREG 0
		272	#endif
		273	#ifndef S_IFDIR
		274	# define S_IFDIR 0
		275	#endif
		276	#ifndef S_IFWHT
		277	# define S_IFWHT 0
		278	#endif
		279	#ifndef S_IFSOCK
		280	# define S_IFSOCK 0
		281	#endif
		282
		283	#ifndef MAP_ANONYMOUS
		284	# ifdef MAP_ANON
		285	# define MAP_ANONYMOUS MAP_ANON
42	# else	286	# else
43	# error sendfile support requested but not available	287	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
44	# endif	288	# endif
45	#endif	289	#endif
46		290	#ifndef MAP_HUGETLB
47	/* used for struct dirent, AIX doesn't provide it */	291	# define MAP_HUGETLB 0
48	#ifndef NAME_MAX
49	# define NAME_MAX 4096
50	#endif	292	#endif
51		293	#ifndef MAP_LOCKED
52	#if __ia64	294	# define MAP_LOCKED 0
53	# define STACKSIZE 65536
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
55	# define STACKSIZE PTHREAD_STACK_MIN
56	#else
57	# define STACKSIZE 16384
58	#endif	295	#endif
		296	#ifndef MAP_NORESERVE
		297	# define MAP_NORESERVE 0
		298	#endif
		299	#ifndef MAP_POPULATE
		300	# define MAP_POPULATE 0
		301	#endif
		302	#ifndef MAP_NONBLOCK
		303	# define MAP_NONBLOCK 0
		304	#endif
59		305
60	/* buffer size for various temporary buffers */	306	#ifndef makedev
61	#define AIO_BUFSIZE 65536	307	# define makedev(maj,min) (((maj) << 8) | (min))
		308	#endif
		309	#ifndef major
		310	# define major(dev) ((dev) >> 8)
		311	#endif
		312	#ifndef minor
		313	# define minor(dev) ((dev) & 0xff)
		314	#endif
62		315
63	#define dBUF \	316	#ifndef PAGESIZE
64	char *aio_buf = malloc (AIO_BUFSIZE); \	317	# define PAGESIZE sysconf (_SC_PAGESIZE)
65	if (!aio_buf) \	318	#endif
66	return -1;
67		319
68	#define fBUF free (aio_buf)	320	static int req_invoke (eio_req *req);
		321	#define EIO_FINISH(req) req_invoke (req)
		322	static void req_destroy (eio_req *grp);
		323	#define EIO_DESTROY(req) req_destroy (req)
69		324
70	enum {	325	enum {
71	REQ_QUIT,	326	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
72	REQ_OPEN, REQ_CLOSE,
73	REQ_READ, REQ_WRITE, REQ_READAHEAD,
74	REQ_SENDFILE,
75	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
76	REQ_FSYNC, REQ_FDATASYNC,
77	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
78	REQ_READDIR,
79	REQ_LINK, REQ_SYMLINK,
80	REQ_GROUP, REQ_NOP,
81	REQ_BUSY,
82	};	327	};
83		328
84	#define AIO_REQ_KLASS "IO::AIO::REQ"	329	#include "libeio/eio.c"
85	#define AIO_GRP_KLASS "IO::AIO::GRP"
86		330
87	typedef struct aio_cb
88	{
89	struct aio_cb *volatile next;
90
91	SV *data, *callback;
92	SV *fh, *fh2;
93	void *dataptr, *data2ptr;
94	Stat_t *statdata;
95	off_t offset;
96	size_t length;
97	ssize_t result;
98
99	STRLEN dataoffset;
100	int type;
101	int fd, fd2;
102	int errorno;
103	mode_t mode; /* open */
104
105	unsigned char flags;
106	unsigned char pri;
107
108	SV *self; /* the perl counterpart of this request, if any */
109	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
110	} aio_cb;
111
112	enum {
113	FLAG_CANCELLED = 0x01,
114	};
115
116	typedef aio_cb *aio_req;	331	typedef eio_req *aio_req;
117	typedef aio_cb *aio_req_ornot;	332	typedef eio_req *aio_req_ornot;
118		333
119	enum {	334	static SV *on_next_submit;
120	PRI_MIN = -4,	335	static int next_pri = EIO_PRI_DEFAULT;
121	PRI_MAX = 4,
122
123	DEFAULT_PRI = 0,
124	PRI_BIAS = -PRI_MIN,
125	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
126	};
127
128	static int next_pri = DEFAULT_PRI + PRI_BIAS;
129
130	static int started, wanted;
131	static volatile int nreqs;
132	static int max_outstanding = 1<<30;	336	static int max_outstanding;
133	static int respipe [2];
134		337
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	338	static s_epipe respipe;
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140		339
141	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	340	static void req_destroy (aio_req req);
142	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
143	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
144
145	/*
146	* a somewhat faster data structure might be nice, but
147	* with 8 priorities this actually needs <20 insns
148	* per shift, the most expensive operation.
149	*/
150	typedef struct {
151	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
152	int size;
153	} reqq;
154
155	static reqq req_queue;
156	static reqq res_queue;
157
158	int reqq_push (reqq *q, aio_req req)
159	{
160	int pri = req->pri;
161	req->next = 0;
162
163	if (q->qe[pri])
164	{
165	q->qe[pri]->next = req;
166	q->qe[pri] = req;
167	}
168	else
169	q->qe[pri] = q->qs[pri] = req;
170
171	return q->size++;
172	}
173
174	aio_req reqq_shift (reqq *q)
175	{
176	int pri;
177
178	if (!q->size)
179	return 0;
180
181	--q->size;
182
183	for (pri = NUM_PRI; pri--; )
184	{
185	aio_req req = q->qs[pri];
186
187	if (req)
188	{
189	if (!(q->qs[pri] = req->next))
190	q->qe[pri] = 0;
191
192	return req;
193	}
194	}
195
196	abort ();
197	}
198
199	static void req_invoke (aio_req req);	341	static void req_cancel (aio_req req);
200	static void req_free (aio_req req);	342
		343	static void want_poll (void)
		344	{
		345	/* write a dummy byte to the pipe so fh becomes ready */
		346	s_epipe_signal (&respipe);
		347	}
		348
		349	static void done_poll (void)
		350	{
		351	/* read any signals sent by the worker threads */
		352	s_epipe_drain (&respipe);
		353	}
201		354
202	/* must be called at most once */	355	/* must be called at most once */
203	static SV *req_sv (aio_req req, const char *klass)	356	static SV *req_sv (aio_req req, HV *stash)
204	{	357	{
205	if (!req->self)	358	if (!req->self)
206	{	359	{
207	req->self = (SV *)newHV ();	360	req->self = (SV *)newHV ();
208	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	361	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
209	}	362	}
210		363
211	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	364	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
212	}	365	}
213		366
214	static aio_req SvAIO_REQ (SV *sv)	367	static aio_req SvAIO_REQ (SV *sv)
215	{	368	{
216	MAGIC *mg;	369	MAGIC *mg;
217		370
218	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	371	if (!SvROK (sv)
		372	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		373	&& SvSTASH (SvRV (sv)) != aio_req_stash
		374	&& !sv_derived_from (sv, "IO::AIO::REQ")))
219	croak ("object of class " AIO_REQ_KLASS " expected");	375	croak ("object of class IO::AIO::REQ expected");
220		376
221	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	377	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
222		378
223	return mg ? (aio_req)mg->mg_ptr : 0;	379	return mg ? (aio_req)mg->mg_ptr : 0;
224	}	380	}
225		381
226	static void aio_grp_feed (aio_req grp)	382	static void aio_grp_feed (aio_req grp)
227	{	383	{
228	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	384	if (grp->sv2 && SvOK (grp->sv2))
229	{	385	{
230	int old_len = grp->length;
231
232	if (grp->fh2 && SvOK (grp->fh2))
233	{
234	dSP;	386	dSP;
235		387
236	ENTER;	388	ENTER;
237	SAVETMPS;	389	SAVETMPS;
238	PUSHMARK (SP);	390	PUSHMARK (SP);
239	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	391	XPUSHs (req_sv (grp, aio_grp_stash));
240	PUTBACK;	392	PUTBACK;
241	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	393	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
242	SPAGAIN;	394	SPAGAIN;
243	FREETMPS;	395	FREETMPS;
244	LEAVE;	396	LEAVE;
245	}
246
247	/* stop if no progress has been made */
248	if (old_len == grp->length)
249	{
250	SvREFCNT_dec (grp->fh2);
251	grp->fh2 = 0;
252	break;
253	}
254	}	397	}
255	}	398	}
256		399
257	static void aio_grp_dec (aio_req grp)	400	static void req_submit (eio_req *req)
258	{	401	{
259	--grp->length;	402	eio_submit (req);
260		403
261	/* call feeder, if applicable */	404	if (expect_false (on_next_submit))
262	aio_grp_feed (grp);
263
264	/* finish, if done */
265	if (!grp->length && grp->fd)
266	{	405	{
267	req_invoke (grp);	406	dSP;
268	req_free (grp);	407	SV *cb = sv_2mortal (on_next_submit);
		408
		409	on_next_submit = 0;
		410
		411	PUSHMARK (SP);
		412	PUTBACK;
		413	call_sv (cb, G_DISCARD | G_EVAL);
269	}	414	}
270	}	415	}
271		416
272	static void poll_wait ()	417	static int req_invoke (eio_req *req)
273	{	418	{
274	fd_set rfd;	419	if (req->flags & FLAG_SV2_RO_OFF)
		420	SvREADONLY_off (req->sv2);
275		421
276	while (nreqs)	422	if (!EIO_CANCELLED (req) && req->callback)
277	{	423	{
278	int size;
279	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
280	pthread_mutex_lock (&reslock);
281	#endif
282	size = res_queue.size;
283	#if !(__i386 || __x86_64) /* safe without sempahore on this archs */
284	pthread_mutex_unlock (&reslock);
285	#endif
286
287	if (size)
288	return;
289
290	FD_ZERO(&rfd);
291	FD_SET(respipe [0], &rfd);
292
293	select (respipe [0] + 1, &rfd, 0, 0, 0);
294	}
295	}
296
297	static void req_invoke (aio_req req)
298	{
299	dSP;	424	dSP;
300		425	static SV *sv_result_cache; /* caches the result integer SV */
301	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	426	SV *sv_result;
302	{
303	errno = req->errorno;
304		427
305	ENTER;	428	ENTER;
306	SAVETMPS;	429	SAVETMPS;
307	PUSHMARK (SP);	430	PUSHMARK (SP);
308	EXTEND (SP, 1);	431	EXTEND (SP, 1);
309		432
		433	/* do not recreate the result IV from scratch each time */
		434	if (expect_true (sv_result_cache))
		435	{
		436	sv_result = sv_result_cache; sv_result_cache = 0;
		437	SvIV_set (sv_result, req->result);
		438	SvIOK_only (sv_result);
		439	}
		440	else
		441	{
		442	sv_result = newSViv (req->result);
		443	SvREADONLY_on (sv_result);
		444	}
		445
310	switch (req->type)	446	switch (req->type)
311	{	447	{
312	case REQ_READDIR:	448	case EIO_READDIR:
313	{	449	{
314	SV *rv = &PL_sv_undef;	450	SV *rv = &PL_sv_undef;
315		451
316	if (req->result >= 0)	452	if (req->result >= 0)
317	{	453	{
		454	int i;
318	char *buf = req->data2ptr;	455	char *names = (char *)req->ptr2;
		456	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
319	AV *av = newAV ();	457	AV *av = newAV ();
320		458
321	while (req->result)	459	av_extend (av, req->result - 1);
		460
		461	for (i = 0; i < req->result; ++i)
322	{	462	{
		463	if (req->int1 & EIO_READDIR_DENTS)
		464	{
		465	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		466
		467	if (req->int1 & EIO_READDIR_CUSTOM2)
		468	{
		469	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		470	AV *avent = newAV ();
		471
		472	av_extend (avent, 2);
		473
		474	if (!sv_type [ent->type])
		475	{
		476	sv_type [ent->type] = newSViv (ent->type);
		477	SvREADONLY_on (sv_type [ent->type]);
		478	}
		479
		480	av_store (avent, 0, namesv);
		481	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		482	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		483
		484	av_store (av, i, newRV_noinc ((SV *)avent));
		485	}
		486	else
		487	av_store (av, i, namesv);
		488
		489	++ent;
		490	}
		491	else
		492	{
323	SV *sv = newSVpv (buf, 0);	493	SV *name = newSVpv (names, 0);
324
325	av_push (av, sv);	494	av_store (av, i, name);
326	buf += SvCUR (sv) + 1;	495	names += SvCUR (name) + 1;
327	req->result--;	496	}
328	}	497	}
329		498
330	rv = sv_2mortal (newRV_noinc ((SV *)av));	499	rv = sv_2mortal (newRV_noinc ((SV *)av));
331	}	500	}
332		501
333	PUSHs (rv);	502	PUSHs (rv);
		503
		504	if (req->int1 & EIO_READDIR_CUSTOM1)
		505	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
334	}	506	}
335	break;	507	break;
336		508
337	case REQ_OPEN:	509	case EIO_OPEN:
338	{	510	{
339	/* convert fd to fh */	511	/* convert fd to fh */
340	SV *fh;	512	SV *fh = &PL_sv_undef;
341		513
342	PUSHs (sv_2mortal (newSViv (req->result)));	514	if (req->result >= 0)
343	PUTBACK;	515	{
344	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	516	GV *gv = (GV *)sv_newmortal ();
345	SPAGAIN;	517	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		518	char sym [64];
		519	int symlen;
		520
		521	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		522	gv_init (gv, aio_stash, sym, symlen, 0);
346		523
347	fh = SvREFCNT_inc (POPs);	524	symlen = snprintf (
		525	sym,
		526	sizeof (sym),
		527	"%s&=%d",
		528	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		529	(int)req->result
		530	);
348		531
		532	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		533	fh = (SV *)gv;
		534	}
		535
349	PUSHMARK (SP);	536	PUSHs (fh);
350	XPUSHs (sv_2mortal (fh));
351	}	537	}
352	break;	538	break;
353		539
		540	case EIO_STATVFS:
		541	case EIO_FSTATVFS:
		542	{
		543	SV *rv = &PL_sv_undef;
		544
		545	#ifndef _WIN32
		546	if (req->result >= 0)
		547	{
		548	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		549	HV *hv = newHV ();
		550
		551	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		552
		553	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		554	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		555	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		556	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		557	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		558	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		559	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		560	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		561	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		562	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		563	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		564	}
		565	#endif
		566
		567	PUSHs (rv);
		568	}
		569
		570	break;
		571
354	case REQ_GROUP:	572	case EIO_GROUP:
355	req->fd = 2; /* mark group as finished */	573	req->int1 = 2; /* mark group as finished */
356		574
357	if (req->data)	575	if (req->sv1)
358	{	576	{
359	int i;	577	int i;
360	AV *av = (AV *)req->data;	578	AV *av = (AV *)req->sv1;
361		579
362	EXTEND (SP, AvFILL (av) + 1);	580	EXTEND (SP, AvFILL (av) + 1);
363	for (i = 0; i <= AvFILL (av); ++i)	581	for (i = 0; i <= AvFILL (av); ++i)
364	PUSHs (*av_fetch (av, i, 0));	582	PUSHs (*av_fetch (av, i, 0));
365	}	583	}
366	break;	584	break;
367		585
368	case REQ_NOP:	586	case EIO_NOP:
369	case REQ_BUSY:	587	case EIO_BUSY:
370	break;	588	break;
371		589
		590	case EIO_READLINK:
		591	case EIO_REALPATH:
		592	if (req->result > 0)
		593	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		594	break;
		595
		596	case EIO_STAT:
		597	case EIO_LSTAT:
		598	case EIO_FSTAT:
		599	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		600	PL_laststatval = req->result;
		601	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		602	PUSHs (sv_result);
		603	break;
		604
		605	case EIO_READ:
		606	{
		607	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		608	*SvEND (req->sv2) = 0;
		609	SvPOK_only (req->sv2);
		610	SvSETMAGIC (req->sv2);
		611	PUSHs (sv_result);
		612	}
		613	break;
		614
		615	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), so fudge result value */
		616	if (req->result > 0)
		617	SvIV_set (sv_result, 0);
		618	/* FALLTHROUGH */
		619
372	default:	620	default:
373	PUSHs (sv_2mortal (newSViv (req->result)));	621	PUSHs (sv_result);
374	break;	622	break;
375	}	623	}
376		624
		625	errno = req->errorno;
377		626
378	PUTBACK;	627	PUTBACK;
379	call_sv (req->callback, G_VOID | G_EVAL);	628	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
380	SPAGAIN;	629	SPAGAIN;
		630
		631	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		632	SvREFCNT_dec (sv_result);
		633	else
		634	sv_result_cache = sv_result;
381		635
382	FREETMPS;	636	FREETMPS;
383	LEAVE;	637	LEAVE;
		638
		639	PUTBACK;
384	}	640	}
385		641
386	if (req->grp)	642	return !!SvTRUE (ERRSV);
387	{
388	aio_req grp = req->grp;
389
390	/* unlink request */
391	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
392	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
393
394	if (grp->grp_first == req)
395	grp->grp_first = req->grp_next;
396
397	aio_grp_dec (grp);
398	}
399
400	if (SvTRUE (ERRSV))
401	{
402	req_free (req);
403	croak (0);
404	}
405	}	643	}
406		644
407	static void req_free (aio_req req)	645	static void req_destroy (aio_req req)
408	{	646	{
409	if (req->self)	647	if (req->self)
410	{	648	{
411	sv_unmagic (req->self, PERL_MAGIC_ext);	649	sv_unmagic (req->self, PERL_MAGIC_ext);
412	SvREFCNT_dec (req->self);	650	SvREFCNT_dec (req->self);
413	}	651	}
414		652
415	SvREFCNT_dec (req->data);
416	SvREFCNT_dec (req->fh);	653	SvREFCNT_dec (req->sv1);
417	SvREFCNT_dec (req->fh2);	654	SvREFCNT_dec (req->sv2);
418	SvREFCNT_dec (req->callback);	655	SvREFCNT_dec (req->callback);
419	Safefree (req->statdata);
420
421	if (req->type == REQ_READDIR && req->result >= 0)
422	free (req->data2ptr);
423		656
424	Safefree (req);	657	Safefree (req);
425	}	658	}
426		659
427	static void req_cancel (aio_req req)	660	static void req_cancel_subs (aio_req grp)
428	{	661	{
429	req->flags |= FLAG_CANCELLED;	662	aio_req sub;
430		663
431	if (req->type == REQ_GROUP)	664	if (grp->type != EIO_GROUP)
		665	return;
		666
		667	SvREFCNT_dec (grp->sv2);
		668	grp->sv2 = 0;
		669
		670	eio_grp_cancel (grp);
		671	}
		672
		673	static void create_respipe (void)
		674	{
		675	if (s_epipe_renew (&respipe))
		676	croak ("IO::AIO: unable to initialize result pipe");
		677	}
		678
		679	static void poll_wait (void)
		680	{
		681	while (eio_nreqs ())
432	{	682	{
433	aio_req sub;	683	int size;
434		684
435	for (sub = req->grp_first; sub; sub = sub->grp_next)	685	X_LOCK (reslock);
436	req_cancel (sub);	686	size = res_queue.size;
		687	X_UNLOCK (reslock);
		688
		689	if (size)
		690	return;
		691
		692	etp_maybe_start_thread ();
		693
		694	s_epipe_wait (&respipe);
437	}	695	}
438	}	696	}
439		697
440	static int poll_cb ()	698	static int poll_cb (void)
441	{	699	{
442	dSP;
443	int count = 0;
444	int do_croak = 0;
445	aio_req req;
446
447	for (;;)	700	for (;;)
448	{	701	{
449	pthread_mutex_lock (&reslock);	702	int res = eio_poll ();
450	req = reqq_shift (&res_queue);
451		703
452	if (req)	704	if (res > 0)
453	{
454	if (!res_queue.size)
455	{
456	/* read any signals sent by the worker threads */
457	char buf [32];
458	while (read (respipe [0], buf, 32) == 32)
459	;
460	}
461	}
462
463	pthread_mutex_unlock (&reslock);
464
465	if (!req)
466	break;	705	croak (0);
467		706
468	--nreqs;	707	if (!max_outstanding || max_outstanding > eio_nreqs ())
		708	return res;
469		709
470	if (req->type == REQ_QUIT)	710	poll_wait ();
471	started--;
472	else if (req->type == REQ_GROUP && req->length)
473	{
474	req->fd = 1; /* mark request as delayed */
475	continue;
476	}
477	else
478	{
479	if (req->type == REQ_READ)
480	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
481
482	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
483	SvREADONLY_off (req->data);
484
485	if (req->statdata)
486	{
487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
488	PL_laststatval = req->result;
489	PL_statcache = *(req->statdata);
490	}
491
492	req_invoke (req);
493
494	count++;
495	}
496
497	req_free (req);
498	}	711	}
499
500	return count;
501	}	712	}
502		713
503	static void *aio_proc(void *arg);
504
505	static void start_thread (void)	714	static void atfork_child (void)
506	{	715	{
507	sigset_t fullsigset, oldsigset;	716	create_respipe ();
508	pthread_t tid;
509	pthread_attr_t attr;
510
511	pthread_attr_init (&attr);
512	pthread_attr_setstacksize (&attr, STACKSIZE);
513	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
514
515	sigfillset (&fullsigset);
516	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
517
518	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
519	started++;
520
521	sigprocmask (SIG_SETMASK, &oldsigset, 0);
522	}
523
524	static void req_send (aio_req req)
525	{
526	while (started < wanted && nreqs >= started)
527	start_thread ();
528
529	++nreqs;
530
531	pthread_mutex_lock (&reqlock);
532	reqq_push (&req_queue, req);
533	pthread_cond_signal (&reqwait);
534	pthread_mutex_unlock (&reqlock);
535
536	if (nreqs > max_outstanding)
537	for (;;)
538	{
539	poll_cb ();
540
541	if (nreqs <= max_outstanding)
542	break;
543
544	poll_wait ();
545	}
546	}
547
548	static void end_thread (void)
549	{
550	aio_req req;
551
552	Newz (0, req, 1, aio_cb);
553
554	req->type = REQ_QUIT;
555	req->pri = PRI_MAX + PRI_BIAS;
556
557	req_send (req);
558	}
559
560	static void min_parallel (int nthreads)
561	{
562	if (wanted < nthreads)
563	wanted = nthreads;
564	}
565
566	static void max_parallel (int nthreads)
567	{
568	int cur = started;
569
570	if (wanted > nthreads)
571	wanted = nthreads;
572
573	while (cur > wanted)
574	{
575	end_thread ();
576	cur--;
577	}
578
579	while (started > wanted)
580	{
581	poll_wait ();
582	poll_cb ();
583	}
584	}
585
586	static void create_pipe ()
587	{
588	if (pipe (respipe))
589	croak ("unable to initialize result pipe");
590
591	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
592	croak ("cannot set result pipe to nonblocking mode");
593
594	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
595	croak ("cannot set result pipe to nonblocking mode");
596	}	717	}
597		718
598	/*****************************************************************************/	719	/*****************************************************************************/
599	/* work around various missing functions */
600		720
601	#if !HAVE_PREADWRITE	721	#if !_POSIX_MAPPED_FILES
602	# define pread aio_pread	722	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
603	# define pwrite aio_pwrite	723	# define munmap(addr,length) (errno = ENOSYS, -1)
604
605	/*
606	* make our pread/pwrite safe against themselves, but not against
607	* normal read/write by using a mutex. slows down execution a lot,
608	* but that's your problem, not mine.
609	*/
610	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
611
612	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
613	{
614	ssize_t res;
615	off_t ooffset;
616
617	pthread_mutex_lock (&preadwritelock);
618	ooffset = lseek (fd, 0, SEEK_CUR);
619	lseek (fd, offset, SEEK_SET);
620	res = read (fd, buf, count);
621	lseek (fd, ooffset, SEEK_SET);
622	pthread_mutex_unlock (&preadwritelock);
623
624	return res;
625	}
626
627	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
628	{
629	ssize_t res;
630	off_t ooffset;
631
632	pthread_mutex_lock (&preadwritelock);
633	ooffset = lseek (fd, 0, SEEK_CUR);
634	lseek (fd, offset, SEEK_SET);
635	res = write (fd, buf, count);
636	lseek (fd, offset, SEEK_SET);
637	pthread_mutex_unlock (&preadwritelock);
638
639	return res;
640	}
641	#endif
642
643	#if !HAVE_FDATASYNC
644	# define fdatasync fsync
645	#endif
646
647	#if !HAVE_READAHEAD
648	# define readahead aio_readahead
649
650	static ssize_t readahead (int fd, off_t offset, size_t count)
651	{
652	dBUF;
653
654	while (count > 0)
655	{
656	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
657
658	pread (fd, aio_buf, len, offset);
659	offset += len;
660	count -= len;
661	}
662
663	fBUF;
664
665	errno = 0;
666	}
667	#endif
668
669	#if !HAVE_READDIR_R
670	# define readdir_r aio_readdir_r
671
672	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
673
674	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
675	{
676	struct dirent *e;
677	int errorno;
678
679	pthread_mutex_lock (&readdirlock);
680
681	e = readdir (dirp);
682	errorno = errno;
683
684	if (e)
685	{
686	*res = ent;
687	strcpy (ent->d_name, e->d_name);
688	}
689	else
690	*res = 0;
691
692	pthread_mutex_unlock (&readdirlock);
693
694	errno = errorno;
695	return e ? 0 : -1;
696	}
697	#endif
698
699	/* sendfile always needs emulation */
700	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
701	{
702	ssize_t res;
703
704	if (!count)
705	return 0;
706
707	#if HAVE_SENDFILE
708	# if __linux
709	res = sendfile (ofd, ifd, &offset, count);
710
711	# elif __freebsd
712	/*
713	* Of course, the freebsd sendfile is a dire hack with no thoughts
714	* wasted on making it similar to other I/O functions.
715	*/
716	{
717	off_t sbytes;
718	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
719
720	if (res < 0 && sbytes)
721	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
722	res = sbytes;
723	}
724
725	# elif __hpux
726	res = sendfile (ofd, ifd, offset, count, 0, 0);
727
728	# elif __solaris
729	{
730	struct sendfilevec vec;
731	size_t sbytes;
732
733	vec.sfv_fd = ifd;
734	vec.sfv_flag = 0;
735	vec.sfv_off = offset;
736	vec.sfv_len = count;
737
738	res = sendfilev (ofd, &vec, 1, &sbytes);
739
740	if (res < 0 && sbytes)
741	res = sbytes;
742	}
743
744	# endif	724	#endif
745	#else
746	res = -1;
747	errno = ENOSYS;
748	#endif
749		725
750	if (res < 0	726	#if !_POSIX_MEMORY_PROTECTION
751	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK	727	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
752	#if __solaris	728	# define PROT_NONE 0
753	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE	729	# define PROT_WRITE 0
		730	# define MAP_PRIVATE 0
		731	# define MAP_SHARED 0
		732	# define MAP_FIXED 0
754	#endif	733	#endif
755	)
756	)
757	{
758	/* emulate sendfile. this is a major pain in the ass */
759	dBUF;
760		734
761	res = 0;	735	#define MMAP_MAGIC PERL_MAGIC_ext
762		736
763	while (count)	737	static int mmap_free (pTHX_ SV *sv, MAGIC *mg)
764	{
765	ssize_t cnt;
766
767	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
768
769	if (cnt <= 0)
770	{
771	if (cnt && !res) res = -1;
772	break;
773	}
774
775	cnt = write (ofd, aio_buf, cnt);
776
777	if (cnt <= 0)
778	{
779	if (cnt && !res) res = -1;
780	break;
781	}
782
783	offset += cnt;
784	res += cnt;
785	count -= cnt;
786	}
787
788	fBUF;
789	}
790
791	return res;
792	}
793
794	/* read a full directory */
795	static int scandir_ (const char *path, void **namesp)
796	{	738	{
797	DIR *dirp;	739	int old_errno = errno;
798	union	740	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
799	{
800	struct dirent d;
801	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
802	} *u;
803	struct dirent *entp;
804	char *name, *names;
805	int memlen = 4096;
806	int memofs = 0;
807	int res = 0;
808	int errorno;
809
810	dirp = opendir (path);
811	if (!dirp)
812	return -1;
813
814	u = malloc (sizeof (*u));
815	names = malloc (memlen);
816
817	if (u && names)
818	for (;;)
819	{
820	errno = 0;
821	readdir_r (dirp, &u->d, &entp);
822
823	if (!entp)
824	break;
825
826	name = entp->d_name;
827
828	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
829	{
830	int len = strlen (name) + 1;
831
832	res++;
833
834	while (memofs + len > memlen)
835	{
836	memlen *= 2;
837	names = realloc (names, memlen);
838	if (!names)
839	break;
840	}
841
842	memcpy (names + memofs, name, len);
843	memofs += len;
844	}
845	}
846
847	errorno = errno;	741	errno = old_errno;
848	free (u);
849	closedir (dirp);
850		742
851	if (errorno)	743	mg->mg_obj = 0; /* just in case */
852	{
853	free (names);
854	errno = errorno;
855	res = -1;
856	}
857		744
858	*namesp = (void *)names;	745	SvREADONLY_off (sv);
		746
		747	if (SvPVX (sv) != mg->mg_ptr)
		748	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
		749
		750	SvCUR_set (sv, 0);
		751	SvPVX (sv) = 0;
		752	SvOK_off (sv);
		753
859	return res;	754	return 0;
860	}	755	}
		756
		757	static MGVTBL mmap_vtbl = {
		758	0, 0, 0, 0, mmap_free
		759	};
861		760
862	/*****************************************************************************/	761	/*****************************************************************************/
863		762
864	static void *aio_proc (void *thr_arg)	763	static SV * get_cb (SV *cb_sv)
865	{	764	{
866	aio_req req;	765	SvGETMAGIC (cb_sv);
867	int type;	766	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
868
869	do
870	{
871	pthread_mutex_lock (&reqlock);
872
873	for (;;)
874	{
875	req = reqq_shift (&req_queue);
876
877	if (req)
878	break;
879
880	pthread_cond_wait (&reqwait, &reqlock);
881	}
882
883	pthread_mutex_unlock (&reqlock);
884
885	errno = 0; /* strictly unnecessary */
886	type = req->type; /* remember type for QUIT check */
887
888	if (!(req->flags & FLAG_CANCELLED))
889	switch (type)
890	{
891	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
892	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
893
894	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
895	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
896
897	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
898	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
899	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
900
901	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
902	case REQ_CLOSE: req->result = close (req->fd); break;
903	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
904	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
905	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
906	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
907	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
908
909	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
910	case REQ_FSYNC: req->result = fsync (req->fd); break;
911	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
912
913	case REQ_BUSY:
914	{
915	struct timeval tv;
916
917	tv.tv_sec = req->fd;
918	tv.tv_usec = req->fd2;
919
920	req->result = select (0, 0, 0, 0, &tv);
921	}
922
923	case REQ_GROUP:
924	case REQ_NOP:
925	case REQ_QUIT:
926	break;
927
928	default:
929	req->result = ENOSYS;
930	break;
931	}
932
933	req->errorno = errno;
934
935	pthread_mutex_lock (&reslock);
936
937	if (!reqq_push (&res_queue, req))
938	/* write a dummy byte to the pipe so fh becomes ready */
939	write (respipe [1], &respipe, 1);
940
941	pthread_mutex_unlock (&reslock);
942	}
943	while (type != REQ_QUIT);
944
945	return 0;
946	}
947
948	/*****************************************************************************/
949
950	static void atfork_prepare (void)
951	{
952	pthread_mutex_lock (&reqlock);
953	pthread_mutex_lock (&reslock);
954	#if !HAVE_PREADWRITE
955	pthread_mutex_lock (&preadwritelock);
956	#endif
957	#if !HAVE_READDIR_R
958	pthread_mutex_lock (&readdirlock);
959	#endif
960	}
961
962	static void atfork_parent (void)
963	{
964	#if !HAVE_READDIR_R
965	pthread_mutex_unlock (&readdirlock);
966	#endif
967	#if !HAVE_PREADWRITE
968	pthread_mutex_unlock (&preadwritelock);
969	#endif
970	pthread_mutex_unlock (&reslock);
971	pthread_mutex_unlock (&reqlock);
972	}
973
974	static void atfork_child (void)
975	{
976	aio_req prv;
977
978	started = 0;
979
980	while (prv = reqq_shift (&req_queue))
981	req_free (prv);
982
983	while (prv = reqq_shift (&res_queue))
984	req_free (prv);
985
986	close (respipe [0]);
987	close (respipe [1]);
988	create_pipe ();
989
990	atfork_parent ();
991	}	767	}
992		768
993	#define dREQ \	769	#define dREQ \
		770	SV *cb_cv; \
994	aio_req req; \	771	aio_req req; \
995	int req_pri = next_pri; \	772	int req_pri = next_pri; \
996	next_pri = DEFAULT_PRI + PRI_BIAS; \	773	next_pri = EIO_PRI_DEFAULT; \
997	\	774	\
998	if (SvOK (callback) && !SvROK (callback)) \	775	cb_cv = get_cb (callback); \
999	croak ("callback must be undef or of reference type"); \
1000	\	776	\
1001	Newz (0, req, 1, aio_cb); \	777	Newz (0, req, 1, eio_req); \
1002	if (!req) \	778	if (!req) \
1003	croak ("out of memory during aio_req allocation"); \	779	croak ("out of memory during eio_req allocation"); \
1004	\	780	\
1005	req->callback = newSVsv (callback); \	781	req->callback = SvREFCNT_inc (cb_cv); \
1006	req->pri = req_pri	782	req->pri = req_pri
1007		783
1008	#define REQ_SEND \	784	#define REQ_SEND \
		785	PUTBACK; \
1009	req_send (req); \	786	req_submit (req); \
		787	SPAGAIN; \
1010	\	788	\
1011	if (GIMME_V != G_VOID) \	789	if (GIMME_V != G_VOID) \
1012	XPUSHs (req_sv (req, AIO_REQ_KLASS));	790	XPUSHs (req_sv (req, aio_req_stash));
1013		791
1014	MODULE = IO::AIO PACKAGE = IO::AIO	792	MODULE = IO::AIO PACKAGE = IO::AIO
1015		793
1016	PROTOTYPES: ENABLE	794	PROTOTYPES: ENABLE
1017		795
1018	BOOT:	796	BOOT:
1019	{	797	{
		798	static const struct {
		799	const char *name;
		800	IV iv;
		801	} *civ, const_iv[] = {
		802	# define const_niv(name, value) { # name, (IV) value },
		803	# define const_iv(name) { # name, (IV) name },
		804	# define const_eio(name) { # name, (IV) EIO_ ## name },
		805	const_iv (EXDEV)
		806	const_iv (ENOSYS)
		807	const_iv (O_RDONLY)
		808	const_iv (O_WRONLY)
		809	const_iv (O_RDWR)
		810	const_iv (O_CREAT)
		811	const_iv (O_TRUNC)
		812	const_iv (O_EXCL)
		813	const_iv (O_APPEND)
		814
		815	const_iv (O_ASYNC)
		816	const_iv (O_DIRECT)
		817	const_iv (O_NOATIME)
		818
		819	const_iv (O_CLOEXEC)
		820	const_iv (O_NOCTTY)
		821	const_iv (O_NOFOLLOW)
		822	const_iv (O_NONBLOCK)
		823	const_iv (O_EXEC)
		824	const_iv (O_SEARCH)
		825	const_iv (O_DIRECTORY)
		826	const_iv (O_DSYNC)
		827	const_iv (O_RSYNC)
		828	const_iv (O_SYNC)
		829	const_iv (O_TTY_INIT)
		830
		831	const_iv (S_IFIFO)
		832	const_iv (S_IFCHR)
		833	const_iv (S_IFBLK)
		834	const_iv (S_IFLNK)
		835	const_iv (S_IFREG)
		836	const_iv (S_IFDIR)
		837	const_iv (S_IFWHT)
		838	const_iv (S_IFSOCK)
		839	const_iv (S_IFMT)
		840
		841	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		842	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		843	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		844	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		845	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		846	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		847
		848	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		849	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		850	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		851	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		852	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		853
		854	const_iv (ST_RDONLY)
		855	const_iv (ST_NOSUID)
		856	const_iv (ST_NODEV)
		857	const_iv (ST_NOEXEC)
		858	const_iv (ST_SYNCHRONOUS)
		859	const_iv (ST_MANDLOCK)
		860	const_iv (ST_WRITE)
		861	const_iv (ST_APPEND)
		862	const_iv (ST_IMMUTABLE)
		863	const_iv (ST_NOATIME)
		864	const_iv (ST_NODIRATIME)
		865	const_iv (ST_RELATIME)
		866
		867	const_iv (PROT_NONE)
		868	const_iv (PROT_EXEC)
		869	const_iv (PROT_READ)
		870	const_iv (PROT_WRITE)
		871
		872	/*const_iv (MAP_FIXED)*/
		873	const_iv (MAP_PRIVATE)
		874	const_iv (MAP_SHARED)
		875	const_iv (MAP_ANONYMOUS)
		876
		877	/* linuxish */
		878	const_iv (MAP_HUGETLB)
		879	const_iv (MAP_LOCKED)
		880	const_iv (MAP_NORESERVE)
		881	const_iv (MAP_POPULATE)
		882	const_iv (MAP_NONBLOCK)
		883
		884	const_eio (MCL_FUTURE)
		885	const_eio (MCL_CURRENT)
		886
		887	const_eio (MS_ASYNC)
		888	const_eio (MS_INVALIDATE)
		889	const_eio (MS_SYNC)
		890
		891	const_eio (MT_MODIFY)
		892
		893	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		894	const_eio (SYNC_FILE_RANGE_WRITE)
		895	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		896
		897	const_eio (FALLOC_FL_KEEP_SIZE)
		898
		899	const_eio (READDIR_DENTS)
		900	const_eio (READDIR_DIRS_FIRST)
		901	const_eio (READDIR_STAT_ORDER)
		902	const_eio (READDIR_FOUND_UNKNOWN)
		903
		904	const_eio (DT_UNKNOWN)
		905	const_eio (DT_FIFO)
		906	const_eio (DT_CHR)
		907	const_eio (DT_DIR)
		908	const_eio (DT_BLK)
		909	const_eio (DT_REG)
		910	const_eio (DT_LNK)
		911	const_eio (DT_SOCK)
		912	const_eio (DT_WHT)
		913	};
		914
1020	HV *stash = gv_stashpv ("IO::AIO", 1);	915	aio_stash = gv_stashpv ("IO::AIO" , 1);
1021	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	916	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1022	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	917	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1023	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1024		918
		919	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		920	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		921
		922	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		923
1025	create_pipe ();	924	create_respipe ();
1026	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1027	}
1028		925
		926	if (eio_init (want_poll, done_poll) < 0)
		927	croak ("IO::AIO: unable to initialise eio library");
		928
		929	/* atfork child called in fifo order, so before eio's handler */
		930	X_THREAD_ATFORK (0, 0, atfork_child);
		931	}
		932
1029	void	933	void
1030	min_parallel (nthreads)	934	max_poll_reqs (unsigned int nreqs)
1031	int nthreads
1032	PROTOTYPE: $	935	PROTOTYPE: $
		936	CODE:
		937	eio_set_max_poll_reqs (nreqs);
1033		938
1034	void	939	void
1035	max_parallel (nthreads)	940	max_poll_time (double nseconds)
1036	int nthreads
1037	PROTOTYPE: $	941	PROTOTYPE: $
1038
1039	int
1040	max_outstanding (nreqs)
1041	int nreqs
1042	PROTOTYPE: $
1043	CODE:	942	CODE:
1044	RETVAL = max_outstanding;	943	eio_set_max_poll_time (nseconds);
		944
		945	void
		946	min_parallel (unsigned int nthreads)
		947	PROTOTYPE: $
		948	CODE:
		949	eio_set_min_parallel (nthreads);
		950
		951	void
		952	max_parallel (unsigned int nthreads)
		953	PROTOTYPE: $
		954	CODE:
		955	eio_set_max_parallel (nthreads);
		956
		957	void
		958	max_idle (unsigned int nthreads)
		959	PROTOTYPE: $
		960	CODE:
		961	eio_set_max_idle (nthreads);
		962
		963	void
		964	idle_timeout (unsigned int seconds)
		965	PROTOTYPE: $
		966	CODE:
		967	eio_set_idle_timeout (seconds);
		968
		969	void
		970	max_outstanding (unsigned int maxreqs)
		971	PROTOTYPE: $
		972	CODE:
1045	max_outstanding = nreqs;	973	max_outstanding = maxreqs;
1046		974
1047	void	975	void
1048	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	976	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1049	SV * pathname
1050	int flags
1051	int mode
1052	SV * callback
1053	PROTOTYPE: $$$;$
1054	PPCODE:	977	PPCODE:
1055	{	978	{
1056	dREQ;	979	dREQ;
1057		980
1058	req->type = REQ_OPEN;	981	req->type = EIO_OPEN;
1059	req->data = newSVsv (pathname);	982	req->sv1 = newSVsv (pathname);
1060	req->dataptr = SvPVbyte_nolen (req->data);	983	req->ptr1 = SvPVbyte_nolen (req->sv1);
1061	req->fd = flags;	984	req->int1 = flags;
1062	req->mode = mode;	985	req->int2 = mode;
1063		986
1064	REQ_SEND;	987	REQ_SEND;
1065	}	988	}
1066		989
1067	void	990	void
1068	aio_close (fh,callback=&PL_sv_undef)	991	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1069	SV * fh
1070	SV * callback
1071	PROTOTYPE: $;$
1072	ALIAS:	992	ALIAS:
1073	aio_close = REQ_CLOSE
1074	aio_fsync = REQ_FSYNC	993	aio_fsync = EIO_FSYNC
1075	aio_fdatasync = REQ_FDATASYNC	994	aio_fdatasync = EIO_FDATASYNC
1076	PPCODE:	995	PPCODE:
1077	{	996	{
		997	int fd = s_fileno_croak (fh, 0);
1078	dREQ;	998	dREQ;
1079		999
1080	req->type = ix;	1000	req->type = ix;
1081	req->fh = newSVsv (fh);	1001	req->sv1 = newSVsv (fh);
1082	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1002	req->int1 = fd;
1083		1003
1084	REQ_SEND (req);	1004	REQ_SEND (req);
1085	}	1005	}
1086		1006
1087	void	1007	void
		1008	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		1009	PPCODE:
		1010	{
		1011	int fd = s_fileno_croak (fh, 0);
		1012	dREQ;
		1013
		1014	req->type = EIO_SYNC_FILE_RANGE;
		1015	req->sv1 = newSVsv (fh);
		1016	req->int1 = fd;
		1017	req->offs = offset;
		1018	req->size = nbytes;
		1019	req->int2 = flags;
		1020
		1021	REQ_SEND (req);
		1022	}
		1023
		1024	void
		1025	aio_fallocate (SV *fh, int mode, off_t offset, size_t len, SV *callback=&PL_sv_undef)
		1026	PPCODE:
		1027	{
		1028	int fd = s_fileno_croak (fh, 0);
		1029	dREQ;
		1030
		1031	req->type = EIO_FALLOCATE;
		1032	req->sv1 = newSVsv (fh);
		1033	req->int1 = fd;
		1034	req->int2 = mode;
		1035	req->offs = offset;
		1036	req->size = len;
		1037
		1038	REQ_SEND (req);
		1039	}
		1040
		1041	void
		1042	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		1043	PPCODE:
		1044	{
		1045	static int close_fd = -1; /* dummy fd to close fds via dup2 */
		1046	int fd = s_fileno_croak (fh, 0);
		1047	dREQ;
		1048
		1049	if (expect_false (close_fd < 0))
		1050	{
		1051	#ifdef _WIN32
		1052	close_fd = _open_osfhandle (socket (AF_INET, SOCK_STREAM, 0), 0);
		1053	#else
		1054	int pipefd [2];
		1055
		1056	if (pipe (pipefd) < 0
		1057	|| close (pipefd [1]) < 0
		1058	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		1059	abort (); /*D*/
		1060
		1061	close_fd = pipefd [0];
		1062	#endif
		1063	}
		1064
		1065	req->type = EIO_DUP2;
		1066	req->int1 = close_fd;
		1067	req->sv2 = newSVsv (fh);
		1068	req->int2 = fd;
		1069
		1070	REQ_SEND (req);
		1071	}
		1072
		1073	void
1088	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	1074	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1089	SV * fh
1090	UV offset
1091	UV length
1092	SV * data
1093	UV dataoffset
1094	SV * callback
1095	ALIAS:	1075	ALIAS:
1096	aio_read = REQ_READ	1076	aio_read = EIO_READ
1097	aio_write = REQ_WRITE	1077	aio_write = EIO_WRITE
1098	PROTOTYPE: $$$$$;$
1099	PPCODE:	1078	PPCODE:
1100	{	1079	{
1101	aio_req req;
1102	STRLEN svlen;	1080	STRLEN svlen;
		1081	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1103	char *svptr = SvPVbyte (data, svlen);	1082	char *svptr = SvPVbyte (data, svlen);
1104		1083	UV len = SvUV (length);
1105	SvUPGRADE (data, SVt_PV);
1106	SvPOK_on (data);
1107		1084
1108	if (dataoffset < 0)	1085	if (dataoffset < 0)
1109	dataoffset += svlen;	1086	dataoffset += svlen;
1110		1087
1111	if (dataoffset < 0 || dataoffset > svlen)	1088	if (dataoffset < 0 || dataoffset > svlen)
1112	croak ("data offset outside of string");	1089	croak ("dataoffset outside of data scalar");
1113		1090
1114	if (ix == REQ_WRITE)	1091	if (ix == EIO_WRITE)
1115	{	1092	{
1116	/* write: check length and adjust. */	1093	/* write: check length and adjust. */
1117	if (length < 0 || length + dataoffset > svlen)	1094	if (!SvOK (length) || len + dataoffset > svlen)
1118	length = svlen - dataoffset;	1095	len = svlen - dataoffset;
1119	}	1096	}
1120	else	1097	else
1121	{	1098	{
1122	/* read: grow scalar as necessary */	1099	/* read: check type and grow scalar as necessary */
		1100	SvUPGRADE (data, SVt_PV);
1123	svptr = SvGROW (data, length + dataoffset);	1101	svptr = SvGROW (data, len + dataoffset + 1);
1124	}	1102	}
1125
1126	if (length < 0)
1127	croak ("length must not be negative");
1128		1103
1129	{	1104	{
1130	dREQ;	1105	dREQ;
1131		1106
1132	req->type = ix;	1107	req->type = ix;
1133	req->fh = newSVsv (fh);	1108	req->sv1 = newSVsv (fh);
1134	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	1109	req->int1 = fd;
1135	: IoOFP (sv_2io (fh)));	1110	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1136	req->offset = offset;	1111	req->size = len;
1137	req->length = length;
1138	req->data = SvREFCNT_inc (data);	1112	req->sv2 = SvREFCNT_inc (data);
1139	req->dataptr = (char *)svptr + dataoffset;	1113	req->ptr2 = (char *)svptr + dataoffset;
		1114	req->stroffset = dataoffset;
1140		1115
1141	if (!SvREADONLY (data))	1116	if (!SvREADONLY (data))
1142	{	1117	{
1143	SvREADONLY_on (data);	1118	SvREADONLY_on (data);
1144	req->data2ptr = (void *)data;	1119	req->flags |= FLAG_SV2_RO_OFF;
1145	}	1120	}
1146		1121
1147	REQ_SEND;	1122	REQ_SEND;
1148	}	1123	}
1149	}	1124	}
1150		1125
1151	void	1126	void
1152	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1127	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1153	SV * out_fh	1128	ALIAS:
1154	SV * in_fh	1129	aio_readlink = EIO_READLINK
1155	UV in_offset	1130	aio_realpath = EIO_REALPATH
1156	UV length
1157	SV * callback
1158	PROTOTYPE: $$$$;$
1159	PPCODE:	1131	PPCODE:
1160	{	1132	{
		1133	SV *data;
		1134	dREQ;
		1135
		1136	req->type = ix;
		1137	req->sv1 = newSVsv (path);
		1138	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1139
		1140	REQ_SEND;
		1141	}
		1142
		1143	void
		1144	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1145	PPCODE:
		1146	{
		1147	int ifd = s_fileno_croak (in_fh , 0);
		1148	int ofd = s_fileno_croak (out_fh, 1);
1161	dREQ;	1149	dREQ;
1162		1150
1163	req->type = REQ_SENDFILE;	1151	req->type = EIO_SENDFILE;
1164	req->fh = newSVsv (out_fh);	1152	req->sv1 = newSVsv (out_fh);
1165	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1153	req->int1 = ofd;
1166	req->fh2 = newSVsv (in_fh);	1154	req->sv2 = newSVsv (in_fh);
1167	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1155	req->int2 = ifd;
1168	req->offset = in_offset;	1156	req->offs = in_offset;
1169	req->length = length;	1157	req->size = length;
1170		1158
1171	REQ_SEND;	1159	REQ_SEND;
1172	}	1160	}
1173		1161
1174	void	1162	void
1175	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1163	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1176	SV * fh
1177	UV offset
1178	IV length
1179	SV * callback
1180	PROTOTYPE: $$$;$
1181	PPCODE:	1164	PPCODE:
1182	{	1165	{
		1166	int fd = s_fileno_croak (fh, 0);
1183	dREQ;	1167	dREQ;
1184		1168
1185	req->type = REQ_READAHEAD;	1169	req->type = EIO_READAHEAD;
1186	req->fh = newSVsv (fh);	1170	req->sv1 = newSVsv (fh);
1187	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1171	req->int1 = fd;
1188	req->offset = offset;	1172	req->offs = offset;
1189	req->length = length;	1173	req->size = length;
1190		1174
1191	REQ_SEND;	1175	REQ_SEND;
1192	}	1176	}
1193		1177
1194	void	1178	void
1195	aio_stat (fh_or_path,callback=&PL_sv_undef)	1179	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1196	SV * fh_or_path
1197	SV * callback
1198	ALIAS:	1180	ALIAS:
1199	aio_stat = REQ_STAT	1181	aio_stat = EIO_STAT
1200	aio_lstat = REQ_LSTAT	1182	aio_lstat = EIO_LSTAT
		1183	aio_statvfs = EIO_STATVFS
1201	PPCODE:	1184	PPCODE:
1202	{	1185	{
1203	dREQ;	1186	dREQ;
1204		1187
1205	New (0, req->statdata, 1, Stat_t);	1188	req->sv1 = newSVsv (fh_or_path);
1206	if (!req->statdata)
1207	{
1208	req_free (req);
1209	croak ("out of memory during aio_req->statdata allocation");
1210	}
1211		1189
1212	if (SvPOK (fh_or_path))	1190	if (SvPOK (req->sv1))
1213	{	1191	{
1214	req->type = ix;	1192	req->type = ix;
1215	req->data = newSVsv (fh_or_path);
1216	req->dataptr = SvPVbyte_nolen (req->data);	1193	req->ptr1 = SvPVbyte_nolen (req->sv1);
1217	}	1194	}
1218	else	1195	else
1219	{	1196	{
1220	req->type = REQ_FSTAT;	1197	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1221	req->fh = newSVsv (fh_or_path);
1222	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1198	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1223	}	1199	}
1224		1200
1225	REQ_SEND;	1201	REQ_SEND;
1226	}	1202	}
1227		1203
		1204	UV
		1205	major (UV dev)
		1206	ALIAS:
		1207	minor = 1
		1208	CODE:
		1209	RETVAL = ix ? major (dev) : minor (dev);
		1210	OUTPUT:
		1211	RETVAL
		1212
		1213	UV
		1214	makedev (UV maj, UV min)
		1215	CODE:
		1216	RETVAL = makedev (maj, min);
		1217	OUTPUT:
		1218	RETVAL
		1219
1228	void	1220	void
		1221	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1222	PPCODE:
		1223	{
		1224	dREQ;
		1225
		1226	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1227	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1228	req->sv1 = newSVsv (fh_or_path);
		1229
		1230	if (SvPOK (req->sv1))
		1231	{
		1232	req->type = EIO_UTIME;
		1233	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1234	}
		1235	else
		1236	{
		1237	req->type = EIO_FUTIME;
		1238	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1239	}
		1240
		1241	REQ_SEND;
		1242	}
		1243
		1244	void
		1245	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1246	PPCODE:
		1247	{
		1248	dREQ;
		1249
		1250	req->sv1 = newSVsv (fh_or_path);
		1251	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1252
		1253	if (SvPOK (req->sv1))
		1254	{
		1255	req->type = EIO_TRUNCATE;
		1256	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1257	}
		1258	else
		1259	{
		1260	req->type = EIO_FTRUNCATE;
		1261	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1262	}
		1263
		1264	REQ_SEND;
		1265	}
		1266
		1267	void
		1268	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1269	ALIAS:
		1270	aio_chmod = EIO_CHMOD
		1271	aio_mkdir = EIO_MKDIR
		1272	PPCODE:
		1273	{
		1274	dREQ;
		1275
		1276	req->int2 = mode;
		1277	req->sv1 = newSVsv (fh_or_path);
		1278
		1279	if (SvPOK (req->sv1))
		1280	{
		1281	req->type = ix;
		1282	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1283	}
		1284	else
		1285	{
		1286	req->type = EIO_FCHMOD;
		1287	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1288	}
		1289
		1290	REQ_SEND;
		1291	}
		1292
		1293	void
		1294	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1295	PPCODE:
		1296	{
		1297	dREQ;
		1298
		1299	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1300	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1301	req->sv1 = newSVsv (fh_or_path);
		1302
		1303	if (SvPOK (req->sv1))
		1304	{
		1305	req->type = EIO_CHOWN;
		1306	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1307	}
		1308	else
		1309	{
		1310	req->type = EIO_FCHOWN;
		1311	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1312	}
		1313
		1314	REQ_SEND;
		1315	}
		1316
		1317	void
		1318	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1319	PPCODE:
		1320	{
		1321	dREQ;
		1322
		1323	req->type = EIO_READDIR;
		1324	req->sv1 = newSVsv (pathname);
		1325	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1326	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1327
		1328	if (flags & EIO_READDIR_DENTS)
		1329	req->int1 |= EIO_READDIR_CUSTOM2;
		1330
		1331	REQ_SEND;
		1332	}
		1333
		1334	void
1229	aio_unlink (pathname,callback=&PL_sv_undef)	1335	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1230	SV * pathname
1231	SV * callback
1232	ALIAS:	1336	ALIAS:
1233	aio_unlink = REQ_UNLINK	1337	aio_unlink = EIO_UNLINK
1234	aio_rmdir = REQ_RMDIR	1338	aio_rmdir = EIO_RMDIR
1235	aio_readdir = REQ_READDIR	1339	aio_readdir = EIO_READDIR
1236	PPCODE:	1340	PPCODE:
1237	{	1341	{
1238	dREQ;	1342	dREQ;
1239		1343
1240	req->type = ix;	1344	req->type = ix;
1241	req->data = newSVsv (pathname);	1345	req->sv1 = newSVsv (pathname);
1242	req->dataptr = SvPVbyte_nolen (req->data);	1346	req->ptr1 = SvPVbyte_nolen (req->sv1);
1243		1347
1244	REQ_SEND;	1348	REQ_SEND;
1245	}	1349	}
1246		1350
1247	void	1351	void
1248	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1352	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1249	SV * oldpath
1250	SV * newpath
1251	SV * callback
1252	ALIAS:	1353	ALIAS:
1253	aio_link = REQ_LINK	1354	aio_link = EIO_LINK
1254	aio_symlink = REQ_SYMLINK	1355	aio_symlink = EIO_SYMLINK
1255	aio_rename = REQ_RENAME	1356	aio_rename = EIO_RENAME
1256	PPCODE:	1357	PPCODE:
1257	{	1358	{
1258	dREQ;	1359	dREQ;
1259		1360
1260	req->type = ix;	1361	req->type = ix;
1261	req->fh = newSVsv (oldpath);	1362	req->sv1 = newSVsv (oldpath);
1262	req->data2ptr = SvPVbyte_nolen (req->fh);	1363	req->ptr1 = SvPVbyte_nolen (req->sv1);
1263	req->data = newSVsv (newpath);	1364	req->sv2 = newSVsv (newpath);
1264	req->dataptr = SvPVbyte_nolen (req->data);	1365	req->ptr2 = SvPVbyte_nolen (req->sv2);
1265		1366
1266	REQ_SEND;	1367	REQ_SEND;
1267	}	1368	}
1268		1369
1269	void	1370	void
1270	aio_busy (delay,callback=&PL_sv_undef)	1371	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1271	double delay
1272	SV * callback
1273	PPCODE:	1372	PPCODE:
1274	{	1373	{
1275	dREQ;	1374	dREQ;
1276		1375
1277	req->type = REQ_BUSY;	1376	req->type = EIO_MKNOD;
1278	req->fd = delay < 0. ? 0 : delay;	1377	req->sv1 = newSVsv (pathname);
1279	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1378	req->ptr1 = SvPVbyte_nolen (req->sv1);
1280		1379	req->int2 = (mode_t)mode;
		1380	req->offs = dev;
		1381
1281	REQ_SEND;	1382	REQ_SEND;
1282	}	1383	}
1283		1384
1284	void	1385	void
1285	aio_group (callback=&PL_sv_undef)	1386	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
1286	SV * callback	1387	ALIAS:
1287	PROTOTYPE: ;$	1388	aio_mtouch = EIO_MTOUCH
		1389	aio_msync = EIO_MSYNC
1288	PPCODE:	1390	PPCODE:
1289	{	1391	{
		1392	STRLEN svlen;
		1393	char *svptr = SvPVbyte (data, svlen);
		1394	UV len = SvUV (length);
		1395
		1396	if (offset < 0)
		1397	offset += svlen;
		1398
		1399	if (offset < 0 || offset > svlen)
		1400	croak ("offset outside of scalar");
		1401
		1402	if (!SvOK (length) || len + offset > svlen)
		1403	len = svlen - offset;
		1404
		1405	{
		1406	dREQ;
		1407
		1408	req->type = ix;
		1409	req->sv2 = SvREFCNT_inc (data);
		1410	req->ptr2 = (char *)svptr + offset;
		1411	req->size = len;
		1412	req->int1 = flags;
		1413
		1414	REQ_SEND;
		1415	}
		1416	}
		1417
		1418	void
		1419	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1420	PPCODE:
		1421	{
		1422	STRLEN svlen;
		1423	char *svptr = SvPVbyte (data, svlen);
		1424	UV len = SvUV (length);
		1425
		1426	if (offset < 0)
		1427	offset += svlen;
		1428
		1429	if (offset < 0 || offset > svlen)
		1430	croak ("offset outside of scalar");
		1431
		1432	if (!SvOK (length) || len + offset > svlen)
		1433	len = svlen - offset;
		1434
		1435	{
		1436	dREQ;
		1437
		1438	req->type = EIO_MLOCK;
		1439	req->sv2 = SvREFCNT_inc (data);
		1440	req->ptr2 = (char *)svptr + offset;
		1441	req->size = len;
		1442
		1443	REQ_SEND;
		1444	}
		1445	}
		1446
		1447	void
		1448	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1449	PPCODE:
		1450	{
		1451	dREQ;
		1452
		1453	req->type = EIO_MLOCKALL;
		1454	req->int1 = flags;
		1455
		1456	REQ_SEND;
		1457	}
		1458
		1459	void
		1460	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1461	PPCODE:
		1462	{
1290	dREQ;	1463	dREQ;
1291		1464
		1465	req->type = EIO_BUSY;
		1466	req->nv1 = delay < 0. ? 0. : delay;
		1467
		1468	REQ_SEND;
		1469	}
		1470
		1471	void
		1472	aio_group (SV *callback=&PL_sv_undef)
		1473	PPCODE:
		1474	{
		1475	dREQ;
		1476
1292	req->type = REQ_GROUP;	1477	req->type = EIO_GROUP;
		1478
1293	req_send (req);	1479	req_submit (req);
1294
1295	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1480	XPUSHs (req_sv (req, aio_grp_stash));
1296	}	1481	}
1297		1482
1298	void	1483	void
1299	aio_nop (callback=&PL_sv_undef)	1484	aio_nop (SV *callback=&PL_sv_undef)
1300	SV * callback	1485	ALIAS:
		1486	aio_nop = EIO_NOP
		1487	aio_sync = EIO_SYNC
1301	PPCODE:	1488	PPCODE:
1302	{	1489	{
1303	dREQ;	1490	dREQ;
1304		1491
1305	req->type = REQ_NOP;	1492	req->type = ix;
1306		1493
1307	REQ_SEND;	1494	REQ_SEND;
1308	}	1495	}
1309		1496
1310	void	1497	int
1311	aioreq_pri (int pri = DEFAULT_PRI)	1498	aioreq_pri (int pri = 0)
1312	CODE:	1499	CODE:
		1500	RETVAL = next_pri;
		1501	if (items > 0)
		1502	{
1313	if (pri < PRI_MIN) pri = PRI_MIN;	1503	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1314	if (pri > PRI_MAX) pri = PRI_MAX;	1504	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1315	next_pri = pri + PRI_BIAS;	1505	next_pri = pri;
		1506	}
		1507	OUTPUT:
		1508	RETVAL
1316		1509
1317	void	1510	void
1318	aioreq_nice (int nice = 0)	1511	aioreq_nice (int nice = 0)
1319	CODE:	1512	CODE:
1320	nice = next_pri - nice;	1513	nice = next_pri - nice;
1321	if (nice < PRI_MIN) nice = PRI_MIN;	1514	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1322	if (nice > PRI_MAX) nice = PRI_MAX;	1515	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1323	next_pri = nice + PRI_BIAS;	1516	next_pri = nice;
1324		1517
1325	void	1518	void
1326	flush ()	1519	flush ()
1327	PROTOTYPE:
1328	CODE:	1520	CODE:
1329	while (nreqs)	1521	while (eio_nreqs ())
1330	{	1522	{
1331	poll_wait ();	1523	poll_wait ();
1332	poll_cb ();	1524	poll_cb ();
1333	}	1525	}
1334		1526
1335	void	1527	int
1336	poll()	1528	poll ()
1337	PROTOTYPE:
1338	CODE:	1529	CODE:
1339	if (nreqs)
1340	{
1341	poll_wait ();	1530	poll_wait ();
1342	poll_cb ();	1531	RETVAL = poll_cb ();
1343	}
1344
1345	int
1346	poll_fileno()
1347	PROTOTYPE:
1348	CODE:
1349	RETVAL = respipe [0];
1350	OUTPUT:	1532	OUTPUT:
1351	RETVAL	1533	RETVAL
1352		1534
1353	int	1535	int
		1536	poll_fileno ()
		1537	CODE:
		1538	RETVAL = s_epipe_fd (&respipe);
		1539	OUTPUT:
		1540	RETVAL
		1541
		1542	int
1354	poll_cb(...)	1543	poll_cb (...)
1355	PROTOTYPE:	1544	PROTOTYPE:
1356	CODE:	1545	CODE:
1357	RETVAL = poll_cb ();	1546	RETVAL = poll_cb ();
1358	OUTPUT:	1547	OUTPUT:
1359	RETVAL	1548	RETVAL
1360		1549
1361	void	1550	void
1362	poll_wait()	1551	poll_wait ()
1363	PROTOTYPE:
1364	CODE:	1552	CODE:
1365	if (nreqs)
1366	poll_wait ();	1553	poll_wait ();
1367		1554
1368	int	1555	int
1369	nreqs()	1556	nreqs ()
1370	PROTOTYPE:
1371	CODE:	1557	CODE:
1372	RETVAL = nreqs;	1558	RETVAL = eio_nreqs ();
1373	OUTPUT:	1559	OUTPUT:
1374	RETVAL	1560	RETVAL
1375		1561
		1562	int
		1563	nready ()
		1564	CODE:
		1565	RETVAL = eio_nready ();
		1566	OUTPUT:
		1567	RETVAL
		1568
		1569	int
		1570	npending ()
		1571	CODE:
		1572	RETVAL = eio_npending ();
		1573	OUTPUT:
		1574	RETVAL
		1575
		1576	int
		1577	nthreads ()
		1578	CODE:
		1579	RETVAL = eio_nthreads ();
		1580	OUTPUT:
		1581	RETVAL
		1582
		1583	int
		1584	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1585	CODE:
		1586	RETVAL = posix_fadvise (fh, offset, length, advice);
		1587	OUTPUT:
		1588	RETVAL
		1589
		1590	ssize_t
		1591	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1592	CODE:
		1593	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1594	OUTPUT:
		1595	RETVAL
		1596
		1597	void
		1598	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1599	PPCODE:
		1600	sv_unmagic (scalar, MMAP_MAGIC);
		1601	{
		1602	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1603	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1604	if (addr == (void *)-1)
		1605	XSRETURN_NO;
		1606
		1607	sv_force_normal (scalar);
		1608
		1609	/* we store the length in mg_obj, as namlen is I32 :/ */
		1610	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1611	->mg_obj = (SV *)length;
		1612
		1613	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1614
		1615	if (!(prot & PROT_WRITE))
		1616	SvREADONLY_on (scalar);
		1617
		1618	if (SvLEN (scalar))
		1619	Safefree (SvPVX (scalar));
		1620
		1621	SvPVX (scalar) = (char *)addr;
		1622	SvCUR_set (scalar, length);
		1623	SvLEN_set (scalar, 0);
		1624	SvPOK_only (scalar);
		1625
		1626	XSRETURN_YES;
		1627	}
		1628
		1629	void
		1630	munmap (SV *scalar)
		1631	CODE:
		1632	sv_unmagic (scalar, MMAP_MAGIC);
		1633
		1634	int
		1635	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1636	ALIAS:
		1637	mprotect = 1
		1638	CODE:
		1639	{
		1640	STRLEN svlen;
		1641	void *addr = SvPVbyte (scalar, svlen);
		1642	size_t len = SvUV (length);
		1643
		1644	if (offset < 0)
		1645	offset += svlen;
		1646
		1647	if (offset < 0 || offset > svlen)
		1648	croak ("offset outside of scalar");
		1649
		1650	if (!SvOK (length) || len + offset > svlen)
		1651	len = svlen - offset;
		1652
		1653	addr = (void *)(((intptr_t)addr) + offset);
		1654	eio_page_align (&addr, &len);
		1655
		1656	switch (ix)
		1657	{
		1658	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1659	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1660	}
		1661	}
		1662	OUTPUT:
		1663	RETVAL
		1664
		1665	int
		1666	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1667	CODE:
		1668	{
		1669	STRLEN svlen;
		1670	void *addr = SvPVbyte (scalar, svlen);
		1671	size_t len = SvUV (length);
		1672
		1673	if (offset < 0)
		1674	offset += svlen;
		1675
		1676	if (offset < 0 || offset > svlen)
		1677	croak ("offset outside of scalar");
		1678
		1679	if (!SvOK (length) || len + offset > svlen)
		1680	len = svlen - offset;
		1681
		1682	addr = (void *)(((intptr_t)addr) + offset);
		1683	eio_page_align (&addr, &len);
		1684	#if _POSIX_MEMLOCK_RANGE
		1685	RETVAL = munlock (addr, len);
		1686	#else
		1687	RETVAL = ((errno = ENOSYS), -1);
		1688	#endif
		1689	}
		1690	OUTPUT:
		1691	RETVAL
		1692
		1693	int
		1694	munlockall ()
		1695	CODE:
		1696	#if _POSIX_MEMLOCK
		1697	munlockall ();
		1698	#else
		1699	RETVAL = -1;
		1700	errno = ENOSYS;
		1701	#endif
		1702	OUTPUT:
		1703	RETVAL
		1704
		1705	void _on_next_submit (SV *cb)
		1706	CODE:
		1707	SvREFCNT_dec (on_next_submit);
		1708	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1709
1376	PROTOTYPES: DISABLE	1710	PROTOTYPES: DISABLE
1377		1711
1378	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1712	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1379		1713
1380	void	1714	void
1381	cancel (aio_req_ornot req)	1715	cancel (aio_req_ornot req)
1382	CODE:	1716	CODE:
1383	req_cancel (req);	1717	eio_cancel (req);
1384		1718
1385	void	1719	void
1386	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1720	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1387	CODE:	1721	PPCODE:
		1722	{
		1723	if (GIMME_V != G_VOID)
		1724	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1725
		1726	if (items > 1)
		1727	{
		1728	SV *cb_cv =get_cb (callback);
		1729
1388	SvREFCNT_dec (req->callback);	1730	SvREFCNT_dec (req->callback);
1389	req->callback = newSVsv (callback);	1731	req->callback = SvREFCNT_inc (cb_cv);
		1732	}
		1733	}
1390		1734
1391	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1735	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1392		1736
1393	void	1737	void
1394	add (aio_req grp, ...)	1738	add (aio_req grp, ...)
1395	PPCODE:	1739	PPCODE:
1396	{	1740	{
1397	int i;	1741	int i;
1398	aio_req req;
1399		1742
1400	if (grp->fd == 2)	1743	if (grp->int1 == 2)
1401	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1744	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1402		1745
1403	for (i = 1; i < items; ++i )	1746	for (i = 1; i < items; ++i )
1404	{	1747	{
		1748	aio_req req;
		1749
1405	if (GIMME_V != G_VOID)	1750	if (GIMME_V != G_VOID)
1406	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1751	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1407		1752
1408	req = SvAIO_REQ (ST (i));	1753	req = SvAIO_REQ (ST (i));
1409		1754
1410	if (req)	1755	if (req)
1411	{	1756	eio_grp_add (grp, req);
1412	++grp->length;
1413	req->grp = grp;
1414
1415	req->grp_prev = 0;
1416	req->grp_next = grp->grp_first;
1417
1418	if (grp->grp_first)
1419	grp->grp_first->grp_prev = req;
1420
1421	grp->grp_first = req;
1422	}
1423	}	1757	}
1424	}	1758	}
		1759
		1760	void
		1761	cancel_subs (aio_req_ornot req)
		1762	CODE:
		1763	req_cancel_subs (req);
1425		1764
1426	void	1765	void
1427	result (aio_req grp, ...)	1766	result (aio_req grp, ...)
1428	CODE:	1767	CODE:
1429	{	1768	{
1430	int i;	1769	int i;
		1770	AV *av;
		1771
		1772	grp->errorno = errno;
		1773
1431	AV *av = newAV ();	1774	av = newAV ();
		1775	av_extend (av, items - 1);
1432		1776
1433	for (i = 1; i < items; ++i )	1777	for (i = 1; i < items; ++i )
1434	av_push (av, newSVsv (ST (i)));	1778	av_push (av, newSVsv (ST (i)));
1435		1779
1436	SvREFCNT_dec (grp->data);	1780	SvREFCNT_dec (grp->sv1);
1437	grp->data = (SV *)av;	1781	grp->sv1 = (SV *)av;
1438	}	1782	}
		1783
		1784	void
		1785	errno (aio_req grp, int errorno = errno)
		1786	CODE:
		1787	grp->errorno = errorno;
1439		1788
1440	void	1789	void
1441	limit (aio_req grp, int limit)	1790	limit (aio_req grp, int limit)
1442	CODE:	1791	CODE:
1443	grp->fd2 = limit;	1792	eio_grp_limit (grp, limit);
1444	aio_grp_feed (grp);
1445		1793
1446	void	1794	void
1447	feed (aio_req grp, SV *callback=&PL_sv_undef)	1795	feed (aio_req grp, SV *callback=&PL_sv_undef)
1448	CODE:	1796	CODE:
1449	{	1797	{
1450	SvREFCNT_dec (grp->fh2);	1798	SvREFCNT_dec (grp->sv2);
1451	grp->fh2 = newSVsv (callback);	1799	grp->sv2 = newSVsv (callback);
		1800	grp->feed = aio_grp_feed;
1452		1801
1453	if (grp->fd2 <= 0)	1802	if (grp->int2 <= 0)
1454	grp->fd2 = 2;	1803	grp->int2 = 2;
1455		1804
1456	aio_grp_feed (grp);	1805	eio_grp_limit (grp, grp->int2);
1457	}	1806	}
1458		1807

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