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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.64 by root, Mon Oct 23 23:54:41 2006 UTC vs.
Revision 1.142 by root, Sat Jun 6 18:19:35 2009 UTC

1	#if __linux	1	#include "libeio/xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"
14
15	#include <pthread.h>
16
17	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
18	#include <errno.h>	11	#include <errno.h>
19	#include <sys/time.h>
20	#include <sys/select.h>
21	#include <sys/types.h>	12	#include <sys/types.h>
22	#include <sys/stat.h>	13	#include <sys/stat.h>
23	#include <limits.h>	14	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	15	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	16	#include <sched.h>
28		17
29	#if HAVE_SENDFILE	18	/* perl namespace pollution */
30	# if __linux	19	#undef VERSION
31	# include <sys/sendfile.h>	20
32	# elif __freebsd	21	#ifdef _WIN32
33	# include <sys/socket.h>	22
34	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
35	# elif __hpux	24	# undef malloc
36	# include <sys/socket.h>	25	# undef free
37	# elif __solaris /* not yet */	26
38	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
39	# else	59	#else
40	# error sendfile support requested but not available	60
41	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
42	#endif	68	#endif
43		69
44	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
45	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
46	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		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 SvVAL64 SvIV
		81	#else
		82	# define SvVAL64 SvNV
47	#endif	83	#endif
48		84
49	#if __ia64	85	/*****************************************************************************/
50	# define STACKSIZE 65536	86
		87	#if __GNUC__ >= 3
		88	# define expect(expr,value) __builtin_expect ((expr),(value))
51	#else	89	#else
52	# define STACKSIZE 8192	90	# define expect(expr,value) (expr)
53	#endif	91	#endif
54		92
55	enum {	93	#define expect_false(expr) expect ((expr) != 0, 0)
56	REQ_QUIT,	94	#define expect_true(expr) expect ((expr) != 0, 1)
57	REQ_OPEN, REQ_CLOSE,	95
58	REQ_READ, REQ_WRITE, REQ_READAHEAD,	96	/*****************************************************************************/
59	REQ_SENDFILE,	97
60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	98	static HV *stash;
61	REQ_FSYNC, REQ_FDATASYNC,	99	typedef SV SV8; /* byte-sv, used for argument-checking */
62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
63	REQ_READDIR,
64	REQ_LINK, REQ_SYMLINK,
65	REQ_GROUP, REQ_NOP,
66	REQ_SLEEP,
67	};
68		100
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		103
72	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
73	{
74	struct aio_cb *volatile next;
75
76	SV *data, *callback;	105	SV *callback; \
77	SV *fh, *fh2;	106	SV *sv1, *sv2; \
78	void *dataptr, *data2ptr;
79	Stat_t *statdata;
80	off_t offset;
81	size_t length;
82	ssize_t result;
83
84	STRLEN dataoffset;	107	STRLEN stroffset; \
85	int type;	108	SV *self;
86	int fd, fd2;
87	int errorno;
88	mode_t mode; /* open */
89		109
90	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
91	unsigned char pri;
92		111
93	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
94	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
95	} aio_cb;	114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
96		118
97	enum {	119	enum {
98	FLAG_CANCELLED = 0x01,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
99	};	121	};
100		122
		123	#include "libeio/eio.c"
		124
101	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
102	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
103		127
104	enum {	128	static SV *on_next_submit;
105	PRI_MIN = -4,	129	static int next_pri = EIO_PRI_DEFAULT;
106	PRI_MAX = 4,
107
108	DEFAULT_PRI = 0,
109	PRI_BIAS = -PRI_MIN,
110	};
111
112	static int next_pri = DEFAULT_PRI + PRI_BIAS;
113
114	static int started, wanted;
115	static volatile int nreqs;
116	static int max_outstanding = 1<<30;	130	static int max_outstanding;
117	static int respipe [2];
118		131
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
121	#else
122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
123	#endif
124		133
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	134	static void req_destroy (aio_req req);
126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
128
129	static volatile aio_req reqs, reqe; /* queue start, queue end */
130	static volatile aio_req ress, rese; /* queue start, queue end */
131
132	static void req_invoke (aio_req req);	135	static void req_cancel (aio_req req);
133	static void req_free (aio_req req);	136
		137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
134		150
135	/* must be called at most once */	151	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
137	{	153	{
138	if (!req->self)	154	if (!req->self)
…		…
156	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
157	}	173	}
158		174
159	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
160	{	176	{
161	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
162	{	178	{
163	int old_len = grp->length;	179	dSP;
164		180
165	if (grp->fh2 && SvOK (grp->fh2))	181	ENTER;
		182	SAVETMPS;
		183	PUSHMARK (SP);
		184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		185	PUTBACK;
		186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		187	SPAGAIN;
		188	FREETMPS;
		189	LEAVE;
		190	}
		191	}
		192
		193	static void req_submit (eio_req *req)
		194	{
		195	eio_submit (req);
		196
		197	if (expect_false (on_next_submit))
		198	{
		199	dSP;
		200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
		207	}
		208	}
		209
		210	static int req_invoke (eio_req *req)
		211	{
		212	dSP;
		213
		214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
		218	{
		219	ENTER;
		220	SAVETMPS;
		221	PUSHMARK (SP);
		222	EXTEND (SP, 1);
		223
		224	switch (req->type)
166	{	225	{
167	dSP;	226	case EIO_READDIR:
		227	{
		228	SV *rv = &PL_sv_undef;
168		229
169	ENTER;	230	if (req->result >= 0)
170	SAVETMPS;	231	{
171	PUSHMARK (SP);	232	int i;
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	233	char *buf = req->ptr2;
173	PUTBACK;	234	AV *av = newAV ();
174	call_sv (grp->fh2, G_VOID | G_EVAL);	235
175	SPAGAIN;	236	av_extend (av, req->result - 1);
176	FREETMPS;	237
177	LEAVE;	238	for (i = 0; i < req->result; ++i)
		239	{
		240	if (req->int1 & EIO_READDIR_DENTS)
		241	{
		242	eio_dirent *ent = (eio_dirent *)buf;
		243	SV *namesv = newSVpvn (ent->name, ent->namelen);
		244
		245	if (req->int1 & EIO_READDIR_CUSTOM2)
		246	{
		247	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		248	AV *avent = newAV ();
		249
		250	av_extend (avent, 2);
		251
		252	if (!sv_type [ent->type])
		253	{
		254	sv_type [ent->type] = newSViv (ent->type);
		255	SvREADONLY_on (sv_type [ent->type]);
		256	}
		257
		258	av_store (avent, 0, namesv);
		259	av_store (avent, 1, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		260	av_store (avent, 2, SvREFCNT_inc (sv_type [ent->type]));
		261
		262	av_store (av, i, newRV_noinc ((SV *)avent));
		263	}
		264	else
		265	av_store (av, i, namesv);
		266
		267	buf += sizeof (eio_dirent);
		268	}
		269	else
		270	{
		271	SV *name = newSVpv (buf, 0);
		272	av_store (av, i, name);
		273	buf += SvCUR (name) + 1;
		274	}
		275	}
		276
		277	rv = sv_2mortal (newRV_noinc ((SV *)av));
		278	}
		279
		280	PUSHs (rv);
		281
		282	if (req->int1 & EIO_READDIR_CUSTOM1)
		283	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		284	}
		285	break;
		286
		287	case EIO_OPEN:
		288	{
		289	/* convert fd to fh */
		290	SV *fh = &PL_sv_undef;
		291
		292	if (req->result >= 0)
		293	{
		294	GV *gv = (GV *)sv_newmortal ();
		295	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		296	char sym [64];
		297	int symlen;
		298
		299	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		300	gv_init (gv, stash, sym, symlen, 0);
		301
		302	symlen = snprintf (
		303	sym,
		304	sizeof (sym),
		305	"%s&=%d",
		306	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		307	req->result
		308	);
		309
		310	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		311	fh = (SV *)gv;
		312	}
		313
		314	PUSHs (fh);
		315	}
		316	break;
		317
		318	case EIO_GROUP:
		319	req->int1 = 2; /* mark group as finished */
		320
		321	if (req->sv1)
		322	{
		323	int i;
		324	AV *av = (AV *)req->sv1;
		325
		326	EXTEND (SP, AvFILL (av) + 1);
		327	for (i = 0; i <= AvFILL (av); ++i)
		328	PUSHs (*av_fetch (av, i, 0));
		329	}
		330	break;
		331
		332	case EIO_NOP:
		333	case EIO_BUSY:
		334	break;
		335
		336	case EIO_READLINK:
		337	if (req->result > 0)
		338	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		339	break;
		340
		341	case EIO_STAT:
		342	case EIO_LSTAT:
		343	case EIO_FSTAT:
		344	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		345	PL_laststatval = req->result;
		346	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		347	PUSHs (sv_2mortal (newSViv (req->result)));
		348	break;
		349
		350	case EIO_READ:
		351	{
		352	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		353	*SvEND (req->sv2) = 0;
		354	SvPOK_only (req->sv2);
		355	SvSETMAGIC (req->sv2);
		356	PUSHs (sv_2mortal (newSViv (req->result)));
		357	}
		358	break;
		359
		360	case EIO_DUP2:
		361	if (req->result > 0)
		362	req->result = 0;
		363	/* FALLTHROUGH */
		364
		365	default:
		366	PUSHs (sv_2mortal (newSViv (req->result)));
		367	break;
178	}	368	}
179		369
180	/* stop if no progress has been made */	370	errno = req->errorno;
181	if (old_len == grp->length)	371
182	{	372	PUTBACK;
183	SvREFCNT_dec (grp->fh2);	373	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
184	grp->fh2 = 0;	374	SPAGAIN;
185	break;	375
186	}	376	FREETMPS;
		377	LEAVE;
		378
		379	PUTBACK;
187	}	380	}
188	}
189		381
190	static void aio_grp_dec (aio_req grp)	382	return !!SvTRUE (ERRSV);
191	{
192	--grp->length;
193
194	/* call feeder, if applicable */
195	aio_grp_feed (grp);
196
197	/* finish, if done */
198	if (!grp->length && grp->fd)
199	{
200	req_invoke (grp);
201	req_free (grp);
202	}
203	}	383	}
204		384
205	static void poll_wait ()
206	{
207	fd_set rfd;
208
209	while (nreqs)
210	{
211	aio_req req;
212	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
213	pthread_mutex_lock (&reslock);
214	#endif
215	req = ress;
216	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
217	pthread_mutex_unlock (&reslock);
218	#endif
219
220	if (req)
221	return;
222
223	FD_ZERO(&rfd);
224	FD_SET(respipe [0], &rfd);
225
226	select (respipe [0] + 1, &rfd, 0, 0, 0);
227	}
228	}
229
230	static void req_invoke (aio_req req)
231	{
232	dSP;
233	int errorno = errno;
234
235	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
236	return;
237
238	errno = req->errorno;
239
240	ENTER;
241	SAVETMPS;
242	PUSHMARK (SP);
243	EXTEND (SP, 1);
244
245	switch (req->type)
246	{
247	case REQ_READDIR:
248	{
249	SV *rv = &PL_sv_undef;
250
251	if (req->result >= 0)
252	{
253	char *buf = req->data2ptr;
254	AV *av = newAV ();
255
256	while (req->result)
257	{
258	SV *sv = newSVpv (buf, 0);
259
260	av_push (av, sv);
261	buf += SvCUR (sv) + 1;
262	req->result--;
263	}
264
265	rv = sv_2mortal (newRV_noinc ((SV *)av));
266	}
267
268	PUSHs (rv);
269	}
270	break;
271
272	case REQ_OPEN:
273	{
274	/* convert fd to fh */
275	SV *fh;
276
277	PUSHs (sv_2mortal (newSViv (req->result)));
278	PUTBACK;
279	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
280	SPAGAIN;
281
282	fh = SvREFCNT_inc (POPs);
283
284	PUSHMARK (SP);
285	XPUSHs (sv_2mortal (fh));
286	}
287	break;
288
289	case REQ_GROUP:
290	req->fd = 2; /* mark group as finished */
291
292	if (req->data)
293	{
294	int i;
295	AV *av = (AV *)req->data;
296
297	EXTEND (SP, AvFILL (av) + 1);
298	for (i = 0; i <= AvFILL (av); ++i)
299	PUSHs (*av_fetch (av, i, 0));
300	}
301	break;
302
303	case REQ_NOP:
304	case REQ_SLEEP:
305	break;
306
307	default:
308	PUSHs (sv_2mortal (newSViv (req->result)));
309	break;
310	}
311
312
313	PUTBACK;
314	call_sv (req->callback, G_VOID | G_EVAL);
315	SPAGAIN;
316
317	FREETMPS;
318	LEAVE;
319
320	errno = errorno;
321
322	if (SvTRUE (ERRSV))
323	{
324	req_free (req);
325	croak (0);
326	}
327	}
328
329	static void req_free (aio_req req)	385	static void req_destroy (aio_req req)
330	{	386	{
331	if (req->grp)
332	{
333	aio_req grp = req->grp;
334
335	/* unlink request */
336	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
337	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
338
339	if (grp->grp_first == req)
340	grp->grp_first = req->grp_next;
341
342	aio_grp_dec (grp);
343	}
344
345	if (req->self)	387	if (req->self)
346	{	388	{
347	sv_unmagic (req->self, PERL_MAGIC_ext);	389	sv_unmagic (req->self, PERL_MAGIC_ext);
348	SvREFCNT_dec (req->self);	390	SvREFCNT_dec (req->self);
349	}	391	}
350		392
351	SvREFCNT_dec (req->data);
352	SvREFCNT_dec (req->fh);	393	SvREFCNT_dec (req->sv1);
353	SvREFCNT_dec (req->fh2);	394	SvREFCNT_dec (req->sv2);
354	SvREFCNT_dec (req->callback);	395	SvREFCNT_dec (req->callback);
355	Safefree (req->statdata);
356
357	if (req->type == REQ_READDIR && req->result >= 0)
358	free (req->data2ptr);
359		396
360	Safefree (req);	397	Safefree (req);
361	}	398	}
362		399
363	static void req_cancel (aio_req req)	400	static void req_cancel_subs (aio_req grp)
364	{	401	{
365	req->flags |= FLAG_CANCELLED;	402	aio_req sub;
366		403
367	if (req->type == REQ_GROUP)	404	if (grp->type != EIO_GROUP)
		405	return;
		406
		407	SvREFCNT_dec (grp->sv2);
		408	grp->sv2 = 0;
		409
		410	eio_grp_cancel (grp);
		411	}
		412
		413	#ifdef USE_SOCKETS_AS_HANDLES
		414	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		415	#else
		416	# define TO_SOCKET(x) (x)
		417	#endif
		418
		419	static void
		420	create_respipe (void)
		421	{
		422	int old_readfd = respipe [0];
		423
		424	if (respipe [1] >= 0)
		425	respipe_close (TO_SOCKET (respipe [1]));
		426
		427	#ifdef _WIN32
		428	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		429	#else
		430	if (pipe (respipe))
		431	#endif
		432	croak ("unable to initialize result pipe");
		433
		434	if (old_readfd >= 0)
368	{	435	{
369	aio_req sub;	436	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		437	croak ("unable to initialize result pipe(2)");
370		438
371	for (sub = req->grp_first; sub; sub = sub->grp_next)	439	respipe_close (respipe [0]);
372	req_cancel (sub);	440	respipe [0] = old_readfd;
373	}	441	}
374	}
375		442
		443	#ifdef _WIN32
		444	int arg = 1;
		445	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		446	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		447	#else
		448	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		449	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		450	#endif
		451	croak ("unable to initialize result pipe(3)");
		452
		453	respipe_osf [0] = TO_SOCKET (respipe [0]);
		454	respipe_osf [1] = TO_SOCKET (respipe [1]);
		455	}
		456
		457	static void poll_wait (void)
		458	{
		459	fd_set rfd;
		460
		461	while (eio_nreqs ())
		462	{
		463	int size;
		464
		465	X_LOCK (reslock);
		466	size = res_queue.size;
		467	X_UNLOCK (reslock);
		468
		469	if (size)
		470	return;
		471
		472	etp_maybe_start_thread ();
		473
		474	FD_ZERO (&rfd);
		475	FD_SET (respipe [0], &rfd);
		476
		477	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		478	}
		479	}
		480
376	static int poll_cb ()	481	static int poll_cb (void)
377	{	482	{
378	dSP;
379	int count = 0;
380	int do_croak = 0;
381	aio_req req;
382
383	for (;;)	483	for (;;)
384	{	484	{
385	pthread_mutex_lock (&reslock);	485	int res = eio_poll ();
386	req = ress;
387		486
388	if (req)	487	if (res > 0)
389	{
390	ress = req->next;
391
392	if (!ress)
393	{
394	/* read any signals sent by the worker threads */
395	char buf [32];
396	while (read (respipe [0], buf, 32) == 32)
397	;
398
399	rese = 0;
400	}
401	}
402
403	pthread_mutex_unlock (&reslock);
404
405	if (!req)
406	break;	488	croak (0);
407		489
408	--nreqs;	490	if (!max_outstanding || max_outstanding > eio_nreqs ())
		491	return res;
409		492
410	if (req->type == REQ_QUIT)	493	poll_wait ();
411	started--;
412	else if (req->type == REQ_GROUP && req->length)
413	{
414	req->fd = 1; /* mark request as delayed */
415	continue;
416	}
417	else
418	{
419	if (req->type == REQ_READ)
420	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
421
422	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
423	SvREADONLY_off (req->data);
424
425	if (req->statdata)
426	{
427	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
428	PL_laststatval = req->result;
429	PL_statcache = *(req->statdata);
430	}
431
432	req_invoke (req);
433
434	count++;
435	}
436
437	req_free (req);
438	}	494	}
439
440	return count;
441	}	495	}
442		496
443	static void *aio_proc(void *arg);
444
445	static void start_thread (void)	497	static void atfork_child (void)
446	{	498	{
447	sigset_t fullsigset, oldsigset;	499	create_respipe ();
448	pthread_t tid;
449	pthread_attr_t attr;
450
451	pthread_attr_init (&attr);
452	pthread_attr_setstacksize (&attr, STACKSIZE);
453	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
454
455	sigfillset (&fullsigset);
456	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
457
458	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
459	started++;
460
461	sigprocmask (SIG_SETMASK, &oldsigset, 0);
462	}	500	}
463		501
464	static void req_send (aio_req req)	502	static SV *
		503	get_cb (SV *cb_sv)
465	{	504	{
466	while (started < wanted && nreqs >= started)	505	HV *st;
467	start_thread ();	506	GV *gvp;
		507	CV *cv;
468		508
469	++nreqs;	509	if (!SvOK (cb_sv))
470
471	pthread_mutex_lock (&reqlock);
472
473	req->next = 0;
474
475	if (reqe)
476	{
477	reqe->next = req;
478	reqe = req;
479	}
480	else
481	reqe = reqs = req;
482
483	pthread_cond_signal (&reqwait);
484	pthread_mutex_unlock (&reqlock);
485
486	if (nreqs > max_outstanding)
487	for (;;)
488	{
489	poll_cb ();
490
491	if (nreqs <= max_outstanding)
492	break;
493
494	poll_wait ();
495	}
496	}
497
498	static void end_thread (void)
499	{
500	aio_req req;
501	Newz (0, req, 1, aio_cb);
502	req->type = REQ_QUIT;
503
504	req_send (req);
505	}
506
507	static void min_parallel (int nthreads)
508	{
509	if (wanted < nthreads)
510	wanted = nthreads;
511	}
512
513	static void max_parallel (int nthreads)
514	{
515	int cur = started;
516
517	if (wanted > nthreads)
518	wanted = nthreads;
519
520	while (cur > wanted)
521	{
522	end_thread ();
523	cur--;
524	}
525
526	while (started > wanted)
527	{
528	poll_wait ();
529	poll_cb ();
530	}
531	}
532
533	static void create_pipe ()
534	{
535	if (pipe (respipe))
536	croak ("unable to initialize result pipe");
537
538	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
539	croak ("cannot set result pipe to nonblocking mode");
540
541	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
542	croak ("cannot set result pipe to nonblocking mode");
543	}
544
545	/*****************************************************************************/
546	/* work around various missing functions */
547
548	#if !HAVE_PREADWRITE
549	# define pread aio_pread
550	# define pwrite aio_pwrite
551
552	/*
553	* make our pread/pwrite safe against themselves, but not against
554	* normal read/write by using a mutex. slows down execution a lot,
555	* but that's your problem, not mine.
556	*/
557	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
558
559	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
560	{
561	ssize_t res;
562	off_t ooffset;
563
564	pthread_mutex_lock (&preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);
567	res = read (fd, buf, count);
568	lseek (fd, ooffset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);
570
571	return res;
572	}
573
574	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
575	{
576	ssize_t res;
577	off_t ooffset;
578
579	pthread_mutex_lock (&preadwritelock);
580	ooffset = lseek (fd, 0, SEEK_CUR);
581	lseek (fd, offset, SEEK_SET);
582	res = write (fd, buf, count);
583	lseek (fd, offset, SEEK_SET);
584	pthread_mutex_unlock (&preadwritelock);
585
586	return res;
587	}
588	#endif
589
590	#if !HAVE_FDATASYNC
591	# define fdatasync fsync
592	#endif
593
594	#if !HAVE_READAHEAD
595	# define readahead aio_readahead
596
597	static ssize_t readahead (int fd, off_t offset, size_t count)
598	{
599	char readahead_buf[4096];
600
601	while (count > 0)
602	{
603	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
604
605	pread (fd, readahead_buf, len, offset);
606	offset += len;
607	count -= len;
608	}
609
610	errno = 0;
611	}
612	#endif
613
614	#if !HAVE_READDIR_R
615	# define readdir_r aio_readdir_r
616
617	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
618
619	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
620	{
621	struct dirent *e;
622	int errorno;
623
624	pthread_mutex_lock (&readdirlock);
625
626	e = readdir (dirp);
627	errorno = errno;
628
629	if (e)
630	{
631	*res = ent;
632	strcpy (ent->d_name, e->d_name);
633	}
634	else
635	*res = 0;
636
637	pthread_mutex_unlock (&readdirlock);
638
639	errno = errorno;
640	return e ? 0 : -1;
641	}
642	#endif
643
644	/* sendfile always needs emulation */
645	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
646	{
647	ssize_t res;
648
649	if (!count)
650	return 0;	510	return 0;
651		511
652	#if HAVE_SENDFILE	512	cv = sv_2cv (cb_sv, &st, &gvp, 0);
653	# if __linux
654	res = sendfile (ofd, ifd, &offset, count);
655		513
656	# elif __freebsd	514	if (!cv)
657	/*	515	croak ("IO::AIO callback must be undef or a CODE reference");
658	* Of course, the freebsd sendfile is a dire hack with no thoughts
659	* wasted on making it similar to other I/O functions.
660	*/
661	{
662	off_t sbytes;
663	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
664		516
665	if (res < 0 && sbytes)	517	return (SV *)cv;
666	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
667	res = sbytes;
668	}
669
670	# elif __hpux
671	res = sendfile (ofd, ifd, offset, count, 0, 0);
672
673	# elif __solaris
674	{
675	struct sendfilevec vec;
676	size_t sbytes;
677
678	vec.sfv_fd = ifd;
679	vec.sfv_flag = 0;
680	vec.sfv_off = offset;
681	vec.sfv_len = count;
682
683	res = sendfilev (ofd, &vec, 1, &sbytes);
684
685	if (res < 0 && sbytes)
686	res = sbytes;
687	}
688
689	# endif
690	#else
691	res = -1;
692	errno = ENOSYS;
693	#endif
694
695	if (res < 0
696	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
697	#if __solaris
698	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
699	#endif
700	)
701	)
702	{
703	/* emulate sendfile. this is a major pain in the ass */
704	char buf[4096];
705	res = 0;
706
707	while (count)
708	{
709	ssize_t cnt;
710
711	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
712
713	if (cnt <= 0)
714	{
715	if (cnt && !res) res = -1;
716	break;
717	}
718
719	cnt = write (ofd, buf, cnt);
720
721	if (cnt <= 0)
722	{
723	if (cnt && !res) res = -1;
724	break;
725	}
726
727	offset += cnt;
728	res += cnt;
729	count -= cnt;
730	}
731	}
732
733	return res;
734	}
735
736	/* read a full directory */
737	static int scandir_ (const char *path, void **namesp)
738	{
739	DIR *dirp = opendir (path);
740	union
741	{
742	struct dirent d;
743	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
744	} u;
745	struct dirent *entp;
746	char *name, *names;
747	int memlen = 4096;
748	int memofs = 0;
749	int res = 0;
750	int errorno;
751
752	if (!dirp)
753	return -1;
754
755	names = malloc (memlen);
756
757	for (;;)
758	{
759	errno = 0, readdir_r (dirp, &u.d, &entp);
760
761	if (!entp)
762	break;
763
764	name = entp->d_name;
765
766	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
767	{
768	int len = strlen (name) + 1;
769
770	res++;
771
772	while (memofs + len > memlen)
773	{
774	memlen *= 2;
775	names = realloc (names, memlen);
776	if (!names)
777	break;
778	}
779
780	memcpy (names + memofs, name, len);
781	memofs += len;
782	}
783	}
784
785	errorno = errno;
786	closedir (dirp);
787
788	if (errorno)
789	{
790	free (names);
791	errno = errorno;
792	res = -1;
793	}
794
795	*namesp = (void *)names;
796	return res;
797	}
798
799	/*****************************************************************************/
800
801	static void *aio_proc (void *thr_arg)
802	{
803	aio_req req;
804	int type;
805
806	do
807	{
808	pthread_mutex_lock (&reqlock);
809
810	for (;;)
811	{
812	req = reqs;
813
814	if (reqs)
815	{
816	reqs = reqs->next;
817	if (!reqs) reqe = 0;
818	}
819
820	if (req)
821	break;
822
823	pthread_cond_wait (&reqwait, &reqlock);
824	}
825
826	pthread_mutex_unlock (&reqlock);
827
828	errno = 0; /* strictly unnecessary */
829	type = req->type; /* remember type for QUIT check */
830
831	if (!(req->flags & FLAG_CANCELLED))
832	switch (type)
833	{
834	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
835	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
836
837	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
838	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
839
840	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
841	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
842	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
843
844	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
845	case REQ_CLOSE: req->result = close (req->fd); break;
846	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
847	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
848	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
849	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
850	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
851
852	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
853	case REQ_FSYNC: req->result = fsync (req->fd); break;
854	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
855
856	case REQ_SLEEP:
857	{
858	struct timeval tv;
859
860	tv.tv_sec = req->fd;
861	tv.tv_usec = req->fd2;
862
863	req->result = select (0, 0, 0, 0, &tv);
864	}
865
866	case REQ_GROUP:
867	case REQ_NOP:
868	case REQ_QUIT:
869	break;
870
871	default:
872	req->result = ENOSYS;
873	break;
874	}
875
876	req->errorno = errno;
877
878	pthread_mutex_lock (&reslock);
879
880	req->next = 0;
881
882	if (rese)
883	{
884	rese->next = req;
885	rese = req;
886	}
887	else
888	{
889	rese = ress = req;
890
891	/* write a dummy byte to the pipe so fh becomes ready */
892	write (respipe [1], &respipe, 1);
893	}
894
895	pthread_mutex_unlock (&reslock);
896	}
897	while (type != REQ_QUIT);
898
899	return 0;
900	}
901
902	/*****************************************************************************/
903
904	static void atfork_prepare (void)
905	{
906	pthread_mutex_lock (&reqlock);
907	pthread_mutex_lock (&reslock);
908	#if !HAVE_PREADWRITE
909	pthread_mutex_lock (&preadwritelock);
910	#endif
911	#if !HAVE_READDIR_R
912	pthread_mutex_lock (&readdirlock);
913	#endif
914	}
915
916	static void atfork_parent (void)
917	{
918	#if !HAVE_READDIR_R
919	pthread_mutex_unlock (&readdirlock);
920	#endif
921	#if !HAVE_PREADWRITE
922	pthread_mutex_unlock (&preadwritelock);
923	#endif
924	pthread_mutex_unlock (&reslock);
925	pthread_mutex_unlock (&reqlock);
926	}
927
928	static void atfork_child (void)
929	{
930	aio_req prv;
931
932	started = 0;
933
934	while (reqs)
935	{
936	prv = reqs;
937	reqs = prv->next;
938	req_free (prv);
939	}
940
941	reqs = reqe = 0;
942
943	while (ress)
944	{
945	prv = ress;
946	ress = prv->next;
947	req_free (prv);
948	}
949
950	ress = rese = 0;
951
952	close (respipe [0]);
953	close (respipe [1]);
954	create_pipe ();
955
956	atfork_parent ();
957	}	518	}
958		519
959	#define dREQ \	520	#define dREQ \
		521	SV *cb_cv; \
960	aio_req req; \	522	aio_req req; \
961	int req_pri = next_pri; \	523	int req_pri = next_pri; \
962	next_pri = DEFAULT_PRI + PRI_BIAS; \	524	next_pri = EIO_PRI_DEFAULT; \
963	\	525	\
964	if (SvOK (callback) && !SvROK (callback)) \	526	cb_cv = get_cb (callback); \
965	croak ("callback must be undef or of reference type"); \
966	\	527	\
967	Newz (0, req, 1, aio_cb); \	528	Newz (0, req, 1, eio_req); \
968	if (!req) \	529	if (!req) \
969	croak ("out of memory during aio_req allocation"); \	530	croak ("out of memory during eio_req allocation"); \
970	\	531	\
971	req->callback = newSVsv (callback); \	532	req->callback = SvREFCNT_inc (cb_cv); \
972	req->pri = req_pri	533	req->pri = req_pri
973		534
974	#define REQ_SEND \	535	#define REQ_SEND \
		536	PUTBACK; \
975	req_send (req); \	537	req_submit (req); \
		538	SPAGAIN; \
976	\	539	\
977	if (GIMME_V != G_VOID) \	540	if (GIMME_V != G_VOID) \
978	XPUSHs (req_sv (req, AIO_REQ_KLASS));	541	XPUSHs (req_sv (req, AIO_REQ_KLASS));
979		542
		543	static int
		544	extract_fd (SV *fh, int wr)
		545	{
		546	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		547
		548	if (fd < 0)
		549	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		550
		551	return fd;
		552	}
		553
980	MODULE = IO::AIO PACKAGE = IO::AIO	554	MODULE = IO::AIO PACKAGE = IO::AIO
981		555
982	PROTOTYPES: ENABLE	556	PROTOTYPES: ENABLE
983		557
984	BOOT:	558	BOOT:
985	{	559	{
986	HV *stash = gv_stashpv ("IO::AIO", 1);	560	stash = gv_stashpv ("IO::AIO", 1);
987	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
988	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
989	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
990		561
		562	static const struct {
		563	const char *name;
		564	IV iv;
		565	} *civ, const_iv[] = {
		566	# define const_iv(name, value) { # name, (IV) value },
		567	# define const_eio(name) { # name, (IV) EIO_ ## name },
		568	const_iv (EXDEV , EXDEV)
		569	const_iv (ENOSYS , ENOSYS)
		570	const_iv (O_RDONLY, O_RDONLY)
		571	const_iv (O_WRONLY, O_WRONLY)
		572	const_iv (O_CREAT , O_CREAT)
		573	const_iv (O_TRUNC , O_TRUNC)
		574	#ifndef _WIN32
		575	const_iv (S_IFIFO , S_IFIFO)
		576	#endif
		577	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		578	const_eio (SYNC_FILE_RANGE_WRITE)
		579	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		580
		581	const_eio (READDIR_DENTS)
		582	const_eio (READDIR_DIRS_FIRST)
		583	const_eio (READDIR_STAT_ORDER)
		584	const_eio (READDIR_FOUND_UNKNOWN)
		585
		586	const_eio (DT_UNKNOWN)
		587	const_eio (DT_FIFO)
		588	const_eio (DT_CHR)
		589	const_eio (DT_DIR)
		590	const_eio (DT_BLK)
		591	const_eio (DT_REG)
		592	const_eio (DT_LNK)
		593	const_eio (DT_SOCK)
		594	const_eio (DT_WHT)
		595	};
		596
		597	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		598	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
		599
991	create_pipe ();	600	create_respipe ();
992	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
993	}
994		601
		602	if (eio_init (want_poll, done_poll) < 0)
		603	croak ("IO::AIO: unable to initialise eio library");
		604
		605	/* atfork child called in fifo order, so before eio's handler */
		606	X_THREAD_ATFORK (0, 0, atfork_child);
		607	}
		608
995	void	609	void
996	min_parallel (nthreads)	610	max_poll_reqs (int nreqs)
997	int nthreads
998	PROTOTYPE: $	611	PROTOTYPE: $
		612	CODE:
		613	eio_set_max_poll_reqs (nreqs);
999		614
1000	void	615	void
1001	max_parallel (nthreads)	616	max_poll_time (double nseconds)
1002	int nthreads
1003	PROTOTYPE: $	617	PROTOTYPE: $
1004
1005	int
1006	max_outstanding (nreqs)
1007	int nreqs
1008	PROTOTYPE: $
1009	CODE:	618	CODE:
1010	RETVAL = max_outstanding;	619	eio_set_max_poll_time (nseconds);
		620
		621	void
		622	min_parallel (int nthreads)
		623	PROTOTYPE: $
		624	CODE:
		625	eio_set_min_parallel (nthreads);
		626
		627	void
		628	max_parallel (int nthreads)
		629	PROTOTYPE: $
		630	CODE:
		631	eio_set_max_parallel (nthreads);
		632
		633	void
		634	max_idle (int nthreads)
		635	PROTOTYPE: $
		636	CODE:
		637	eio_set_max_idle (nthreads);
		638
		639	void
		640	max_outstanding (int maxreqs)
		641	PROTOTYPE: $
		642	CODE:
1011	max_outstanding = nreqs;	643	max_outstanding = maxreqs;
1012		644
1013	void	645	void
1014	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	646	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1015	SV * pathname
1016	int flags
1017	int mode
1018	SV * callback
1019	PROTOTYPE: $$$;$	647	PROTOTYPE: $$$;$
1020	PPCODE:	648	PPCODE:
1021	{	649	{
1022	dREQ;	650	dREQ;
1023		651
1024	req->type = REQ_OPEN;	652	req->type = EIO_OPEN;
1025	req->data = newSVsv (pathname);	653	req->sv1 = newSVsv (pathname);
1026	req->dataptr = SvPVbyte_nolen (req->data);	654	req->ptr1 = SvPVbyte_nolen (req->sv1);
1027	req->fd = flags;	655	req->int1 = flags;
1028	req->mode = mode;	656	req->int2 = mode;
1029		657
1030	REQ_SEND;	658	REQ_SEND;
1031	}	659	}
1032		660
1033	void	661	void
1034	aio_close (fh,callback=&PL_sv_undef)	662	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1035	SV * fh
1036	SV * callback
1037	PROTOTYPE: $;$	663	PROTOTYPE: $;$
1038	ALIAS:	664	ALIAS:
1039	aio_close = REQ_CLOSE
1040	aio_fsync = REQ_FSYNC	665	aio_fsync = EIO_FSYNC
1041	aio_fdatasync = REQ_FDATASYNC	666	aio_fdatasync = EIO_FDATASYNC
1042	PPCODE:	667	PPCODE:
1043	{	668	{
		669	int fd = extract_fd (fh, 0);
1044	dREQ;	670	dREQ;
1045		671
1046	req->type = ix;	672	req->type = ix;
1047	req->fh = newSVsv (fh);	673	req->sv1 = newSVsv (fh);
1048	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	674	req->int1 = fd;
1049		675
1050	REQ_SEND (req);	676	REQ_SEND (req);
1051	}	677	}
1052		678
1053	void	679	void
		680	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		681	PROTOTYPE: $$$$;$
		682	PPCODE:
		683	{
		684	int fd = extract_fd (fh, 0);
		685	dREQ;
		686
		687	req->type = EIO_SYNC_FILE_RANGE;
		688	req->sv1 = newSVsv (fh);
		689	req->int1 = fd;
		690	req->offs = SvVAL64 (offset);
		691	req->size = SvVAL64 (nbytes);
		692	req->int2 = flags;
		693
		694	REQ_SEND (req);
		695	}
		696
		697	void
		698	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		699	PROTOTYPE: $;$
		700	PPCODE:
		701	{
		702	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		703	int fd = extract_fd (fh, 0);
		704	dREQ;
		705
		706	if (close_pipe < 0)
		707	{
		708	int pipefd [2];
		709
		710	if (pipe (pipefd) < 0
		711	|| close (pipefd [1]) < 0
		712	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		713	abort (); /*D*/
		714
		715	close_pipe = pipefd [0];
		716	}
		717
		718	req->type = EIO_DUP2;
		719	req->int1 = close_pipe;
		720	req->sv2 = newSVsv (fh);
		721	req->int2 = fd;
		722
		723	REQ_SEND (req);
		724	}
		725
		726	void
1054	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	727	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1055	SV * fh
1056	UV offset
1057	UV length
1058	SV * data
1059	UV dataoffset
1060	SV * callback
1061	ALIAS:	728	ALIAS:
1062	aio_read = REQ_READ	729	aio_read = EIO_READ
1063	aio_write = REQ_WRITE	730	aio_write = EIO_WRITE
1064	PROTOTYPE: $$$$$;$	731	PROTOTYPE: $$$$$;$
1065	PPCODE:	732	PPCODE:
1066	{	733	{
1067	aio_req req;
1068	STRLEN svlen;	734	STRLEN svlen;
		735	int fd = extract_fd (fh, ix == EIO_WRITE);
1069	char *svptr = SvPVbyte (data, svlen);	736	char *svptr = SvPVbyte (data, svlen);
1070		737	UV len = SvUV (length);
1071	SvUPGRADE (data, SVt_PV);
1072	SvPOK_on (data);
1073		738
1074	if (dataoffset < 0)	739	if (dataoffset < 0)
1075	dataoffset += svlen;	740	dataoffset += svlen;
1076		741
1077	if (dataoffset < 0 || dataoffset > svlen)	742	if (dataoffset < 0 || dataoffset > svlen)
1078	croak ("data offset outside of string");	743	croak ("dataoffset outside of data scalar");
1079		744
1080	if (ix == REQ_WRITE)	745	if (ix == EIO_WRITE)
1081	{	746	{
1082	/* write: check length and adjust. */	747	/* write: check length and adjust. */
1083	if (length < 0 || length + dataoffset > svlen)	748	if (!SvOK (length) || len + dataoffset > svlen)
1084	length = svlen - dataoffset;	749	len = svlen - dataoffset;
1085	}	750	}
1086	else	751	else
1087	{	752	{
1088	/* read: grow scalar as necessary */	753	/* read: check type and grow scalar as necessary */
		754	SvUPGRADE (data, SVt_PV);
1089	svptr = SvGROW (data, length + dataoffset);	755	svptr = SvGROW (data, len + dataoffset + 1);
1090	}	756	}
1091
1092	if (length < 0)
1093	croak ("length must not be negative");
1094		757
1095	{	758	{
1096	dREQ;	759	dREQ;
1097		760
1098	req->type = ix;	761	req->type = ix;
1099	req->fh = newSVsv (fh);	762	req->sv1 = newSVsv (fh);
1100	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	763	req->int1 = fd;
1101	: IoOFP (sv_2io (fh)));	764	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1102	req->offset = offset;	765	req->size = len;
1103	req->length = length;
1104	req->data = SvREFCNT_inc (data);	766	req->sv2 = SvREFCNT_inc (data);
1105	req->dataptr = (char *)svptr + dataoffset;	767	req->ptr2 = (char *)svptr + dataoffset;
		768	req->stroffset = dataoffset;
1106		769
1107	if (!SvREADONLY (data))	770	if (!SvREADONLY (data))
1108	{	771	{
1109	SvREADONLY_on (data);	772	SvREADONLY_on (data);
1110	req->data2ptr = (void *)data;	773	req->flags |= FLAG_SV2_RO_OFF;
1111	}	774	}
1112		775
1113	REQ_SEND;	776	REQ_SEND;
1114	}	777	}
1115	}	778	}
1116		779
1117	void	780	void
		781	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		782	PROTOTYPE: $$;$
		783	PPCODE:
		784	{
		785	SV *data;
		786	dREQ;
		787
		788	req->type = EIO_READLINK;
		789	req->sv1 = newSVsv (path);
		790	req->ptr1 = SvPVbyte_nolen (req->sv1);
		791
		792	REQ_SEND;
		793	}
		794
		795	void
1118	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	796	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1119	SV * out_fh
1120	SV * in_fh
1121	UV in_offset
1122	UV length
1123	SV * callback
1124	PROTOTYPE: $$$$;$	797	PROTOTYPE: $$$$;$
1125	PPCODE:	798	PPCODE:
1126	{	799	{
		800	int ifd = extract_fd (in_fh , 0);
		801	int ofd = extract_fd (out_fh, 0);
1127	dREQ;	802	dREQ;
1128		803
1129	req->type = REQ_SENDFILE;	804	req->type = EIO_SENDFILE;
1130	req->fh = newSVsv (out_fh);	805	req->sv1 = newSVsv (out_fh);
1131	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	806	req->int1 = ofd;
1132	req->fh2 = newSVsv (in_fh);	807	req->sv2 = newSVsv (in_fh);
1133	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	808	req->int2 = ifd;
1134	req->offset = in_offset;	809	req->offs = SvVAL64 (in_offset);
1135	req->length = length;	810	req->size = length;
1136		811
1137	REQ_SEND;	812	REQ_SEND;
1138	}	813	}
1139		814
1140	void	815	void
1141	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	816	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1142	SV * fh
1143	UV offset
1144	IV length
1145	SV * callback
1146	PROTOTYPE: $$$;$	817	PROTOTYPE: $$$;$
1147	PPCODE:	818	PPCODE:
1148	{	819	{
		820	int fd = extract_fd (fh, 0);
1149	dREQ;	821	dREQ;
1150		822
1151	req->type = REQ_READAHEAD;	823	req->type = EIO_READAHEAD;
1152	req->fh = newSVsv (fh);	824	req->sv1 = newSVsv (fh);
1153	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	825	req->int1 = fd;
1154	req->offset = offset;	826	req->offs = SvVAL64 (offset);
1155	req->length = length;	827	req->size = length;
1156		828
1157	REQ_SEND;	829	REQ_SEND;
1158	}	830	}
1159		831
1160	void	832	void
1161	aio_stat (fh_or_path,callback=&PL_sv_undef)	833	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1162	SV * fh_or_path
1163	SV * callback
1164	ALIAS:	834	ALIAS:
1165	aio_stat = REQ_STAT	835	aio_stat = EIO_STAT
1166	aio_lstat = REQ_LSTAT	836	aio_lstat = EIO_LSTAT
1167	PPCODE:	837	PPCODE:
1168	{	838	{
1169	dREQ;	839	dREQ;
1170		840
1171	New (0, req->statdata, 1, Stat_t);	841	req->sv1 = newSVsv (fh_or_path);
1172	if (!req->statdata)
1173	{
1174	req_free (req);
1175	croak ("out of memory during aio_req->statdata allocation");
1176	}
1177		842
1178	if (SvPOK (fh_or_path))	843	if (SvPOK (req->sv1))
1179	{	844	{
1180	req->type = ix;	845	req->type = ix;
1181	req->data = newSVsv (fh_or_path);
1182	req->dataptr = SvPVbyte_nolen (req->data);	846	req->ptr1 = SvPVbyte_nolen (req->sv1);
1183	}	847	}
1184	else	848	else
1185	{	849	{
1186	req->type = REQ_FSTAT;	850	req->type = EIO_FSTAT;
1187	req->fh = newSVsv (fh_or_path);
1188	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	851	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1189	}	852	}
1190		853
1191	REQ_SEND;	854	REQ_SEND;
1192	}	855	}
1193		856
1194	void	857	void
		858	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		859	PPCODE:
		860	{
		861	dREQ;
		862
		863	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		864	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		865	req->sv1 = newSVsv (fh_or_path);
		866
		867	if (SvPOK (req->sv1))
		868	{
		869	req->type = EIO_UTIME;
		870	req->ptr1 = SvPVbyte_nolen (req->sv1);
		871	}
		872	else
		873	{
		874	req->type = EIO_FUTIME;
		875	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		876	}
		877
		878	REQ_SEND;
		879	}
		880
		881	void
		882	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->sv1 = newSVsv (fh_or_path);
		888	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		889
		890	if (SvPOK (req->sv1))
		891	{
		892	req->type = EIO_TRUNCATE;
		893	req->ptr1 = SvPVbyte_nolen (req->sv1);
		894	}
		895	else
		896	{
		897	req->type = EIO_FTRUNCATE;
		898	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		899	}
		900
		901	REQ_SEND;
		902	}
		903
		904	void
		905	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		906	ALIAS:
		907	aio_chmod = EIO_CHMOD
		908	aio_mkdir = EIO_MKDIR
		909	PPCODE:
		910	{
		911	dREQ;
		912
		913	req->int2 = mode;
		914	req->sv1 = newSVsv (fh_or_path);
		915
		916	if (SvPOK (req->sv1))
		917	{
		918	req->type = ix;
		919	req->ptr1 = SvPVbyte_nolen (req->sv1);
		920	}
		921	else
		922	{
		923	req->type = EIO_FCHMOD;
		924	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		925	}
		926
		927	REQ_SEND;
		928	}
		929
		930	void
		931	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		932	PPCODE:
		933	{
		934	dREQ;
		935
		936	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		937	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		938	req->sv1 = newSVsv (fh_or_path);
		939
		940	if (SvPOK (req->sv1))
		941	{
		942	req->type = EIO_CHOWN;
		943	req->ptr1 = SvPVbyte_nolen (req->sv1);
		944	}
		945	else
		946	{
		947	req->type = EIO_FCHOWN;
		948	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		949	}
		950
		951	REQ_SEND;
		952	}
		953
		954	void
		955	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		956	PPCODE:
		957	{
		958	dREQ;
		959
		960	req->type = EIO_READDIR;
		961	req->sv1 = newSVsv (pathname);
		962	req->ptr1 = SvPVbyte_nolen (req->sv1);
		963	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		964
		965	if (flags & EIO_READDIR_DENTS)
		966	req->int1 |= EIO_READDIR_CUSTOM2;
		967
		968	REQ_SEND;
		969	}
		970
		971	void
1195	aio_unlink (pathname,callback=&PL_sv_undef)	972	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1196	SV * pathname
1197	SV * callback
1198	ALIAS:	973	ALIAS:
1199	aio_unlink = REQ_UNLINK	974	aio_unlink = EIO_UNLINK
1200	aio_rmdir = REQ_RMDIR	975	aio_rmdir = EIO_RMDIR
1201	aio_readdir = REQ_READDIR	976	aio_readdir = EIO_READDIR
1202	PPCODE:	977	PPCODE:
1203	{	978	{
1204	dREQ;	979	dREQ;
1205		980
1206	req->type = ix;	981	req->type = ix;
1207	req->data = newSVsv (pathname);	982	req->sv1 = newSVsv (pathname);
1208	req->dataptr = SvPVbyte_nolen (req->data);	983	req->ptr1 = SvPVbyte_nolen (req->sv1);
		984
		985	REQ_SEND;
		986	}
		987
		988	void
		989	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		990	ALIAS:
		991	aio_link = EIO_LINK
		992	aio_symlink = EIO_SYMLINK
		993	aio_rename = EIO_RENAME
		994	PPCODE:
		995	{
		996	dREQ;
		997
		998	req->type = ix;
		999	req->sv1 = newSVsv (oldpath);
		1000	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1001	req->sv2 = newSVsv (newpath);
		1002	req->ptr2 = SvPVbyte_nolen (req->sv2);
1209		1003
1210	REQ_SEND;	1004	REQ_SEND;
1211	}	1005	}
1212		1006
1213	void	1007	void
1214	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1008	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1215	SV * oldpath
1216	SV * newpath
1217	SV * callback
1218	ALIAS:
1219	aio_link = REQ_LINK
1220	aio_symlink = REQ_SYMLINK
1221	aio_rename = REQ_RENAME
1222	PPCODE:	1009	PPCODE:
1223	{	1010	{
1224	dREQ;	1011	dREQ;
1225		1012
1226	req->type = ix;	1013	req->type = EIO_MKNOD;
1227	req->fh = newSVsv (oldpath);	1014	req->sv1 = newSVsv (pathname);
1228	req->data2ptr = SvPVbyte_nolen (req->fh);	1015	req->ptr1 = SvPVbyte_nolen (req->sv1);
1229	req->data = newSVsv (newpath);	1016	req->int2 = (mode_t)mode;
1230	req->dataptr = SvPVbyte_nolen (req->data);	1017	req->offs = dev;
1231		1018
1232	REQ_SEND;	1019	REQ_SEND;
1233	}	1020	}
1234		1021
1235	void	1022	void
1236	aio_sleep (delay,callback=&PL_sv_undef)	1023	aio_busy (double delay, SV *callback=&PL_sv_undef)
1237	double delay
1238	SV * callback
1239	PPCODE:	1024	PPCODE:
1240	{	1025	{
1241	dREQ;	1026	dREQ;
1242		1027
1243	req->type = REQ_SLEEP;	1028	req->type = EIO_BUSY;
1244	req->fd = delay < 0. ? 0 : delay;	1029	req->nv1 = delay < 0. ? 0. : delay;
1245	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1246		1030
1247	REQ_SEND;	1031	REQ_SEND;
1248	}	1032	}
1249		1033
1250	void	1034	void
1251	aio_group (callback=&PL_sv_undef)	1035	aio_group (SV *callback=&PL_sv_undef)
1252	SV * callback
1253	PROTOTYPE: ;$	1036	PROTOTYPE: ;$
1254	PPCODE:	1037	PPCODE:
1255	{	1038	{
1256	dREQ;	1039	dREQ;
1257		1040
1258	req->type = REQ_GROUP;	1041	req->type = EIO_GROUP;
		1042
1259	req_send (req);	1043	req_submit (req);
1260
1261	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1044	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1262	}	1045	}
1263		1046
1264	void	1047	void
1265	aio_nop (callback=&PL_sv_undef)	1048	aio_nop (SV *callback=&PL_sv_undef)
1266	SV * callback	1049	ALIAS:
		1050	aio_nop = EIO_NOP
		1051	aio_sync = EIO_SYNC
1267	PPCODE:	1052	PPCODE:
1268	{	1053	{
1269	dREQ;	1054	dREQ;
1270		1055
1271	req->type = REQ_NOP;	1056	req->type = ix;
1272		1057
1273	REQ_SEND;	1058	REQ_SEND;
1274	}	1059	}
1275		1060
1276	#if 0	1061	int
1277		1062	aioreq_pri (int pri = 0)
1278	void	1063	PROTOTYPE: ;$
1279	aio_pri (int pri = DEFAULT_PRI)
1280	CODE:	1064	CODE:
		1065	RETVAL = next_pri;
		1066	if (items > 0)
		1067	{
1281	if (pri < PRI_MIN) pri = PRI_MIN;	1068	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1282	if (pri > PRI_MAX) pri = PRI_MAX;	1069	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1283	next_pri = pri + PRI_BIAS;	1070	next_pri = pri;
		1071	}
		1072	OUTPUT:
		1073	RETVAL
1284		1074
1285	#endif	1075	void
		1076	aioreq_nice (int nice = 0)
		1077	CODE:
		1078	nice = next_pri - nice;
		1079	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1080	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1081	next_pri = nice;
1286		1082
1287	void	1083	void
1288	flush ()	1084	flush ()
1289	PROTOTYPE:	1085	PROTOTYPE:
1290	CODE:	1086	CODE:
1291	while (nreqs)	1087	while (eio_nreqs ())
1292	{	1088	{
1293	poll_wait ();	1089	poll_wait ();
1294	poll_cb ();	1090	poll_cb ();
1295	}	1091	}
1296		1092
1297	void	1093	int
1298	poll()	1094	poll()
1299	PROTOTYPE:	1095	PROTOTYPE:
1300	CODE:	1096	CODE:
1301	if (nreqs)
1302	{
1303	poll_wait ();	1097	poll_wait ();
1304	poll_cb ();	1098	RETVAL = poll_cb ();
1305	}	1099	OUTPUT:
		1100	RETVAL
1306		1101
1307	int	1102	int
1308	poll_fileno()	1103	poll_fileno()
1309	PROTOTYPE:	1104	PROTOTYPE:
1310	CODE:	1105	CODE:
…		…
1322		1117
1323	void	1118	void
1324	poll_wait()	1119	poll_wait()
1325	PROTOTYPE:	1120	PROTOTYPE:
1326	CODE:	1121	CODE:
1327	if (nreqs)
1328	poll_wait ();	1122	poll_wait ();
1329		1123
1330	int	1124	int
1331	nreqs()	1125	nreqs()
1332	PROTOTYPE:	1126	PROTOTYPE:
1333	CODE:	1127	CODE:
1334	RETVAL = nreqs;	1128	RETVAL = eio_nreqs ();
1335	OUTPUT:	1129	OUTPUT:
1336	RETVAL	1130	RETVAL
1337		1131
		1132	int
		1133	nready()
		1134	PROTOTYPE:
		1135	CODE:
		1136	RETVAL = eio_nready ();
		1137	OUTPUT:
		1138	RETVAL
		1139
		1140	int
		1141	npending()
		1142	PROTOTYPE:
		1143	CODE:
		1144	RETVAL = eio_npending ();
		1145	OUTPUT:
		1146	RETVAL
		1147
		1148	int
		1149	nthreads()
		1150	PROTOTYPE:
		1151	CODE:
		1152	RETVAL = eio_nthreads ();
		1153	OUTPUT:
		1154	RETVAL
		1155
		1156	void _on_next_submit (SV *cb)
		1157	CODE:
		1158	SvREFCNT_dec (on_next_submit);
		1159	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1160
1338	PROTOTYPES: DISABLE	1161	PROTOTYPES: DISABLE
1339		1162
1340	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1163	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1341		1164
1342	void	1165	void
1343	cancel (aio_req_ornot req)	1166	cancel (aio_req_ornot req)
1344	PROTOTYPE:
1345	CODE:	1167	CODE:
1346	req_cancel (req);	1168	eio_cancel (req);
1347		1169
1348	void	1170	void
1349	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1171	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1350	CODE:	1172	PPCODE:
		1173	{
		1174	if (GIMME_V != G_VOID)
		1175	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1176
		1177	if (items > 1)
		1178	{
		1179	SV *cb_cv = get_cb (callback);
		1180
1351	SvREFCNT_dec (req->callback);	1181	SvREFCNT_dec (req->callback);
1352	req->callback = newSVsv (callback);	1182	req->callback = SvREFCNT_inc (cb_cv);
		1183	}
		1184	}
1353		1185
1354	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1186	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1355		1187
1356	void	1188	void
1357	add (aio_req grp, ...)	1189	add (aio_req grp, ...)
1358	PPCODE:	1190	PPCODE:
1359	{	1191	{
1360	int i;	1192	int i;
1361	aio_req req;
1362		1193
1363	if (grp->fd == 2)	1194	if (grp->int1 == 2)
1364	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1195	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1365		1196
1366	for (i = 1; i < items; ++i )	1197	for (i = 1; i < items; ++i )
1367	{	1198	{
		1199	aio_req req;
		1200
1368	if (GIMME_V != G_VOID)	1201	if (GIMME_V != G_VOID)
1369	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1202	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1370		1203
1371	req = SvAIO_REQ (ST (i));	1204	req = SvAIO_REQ (ST (i));
1372		1205
1373	if (req)	1206	if (req)
1374	{	1207	eio_grp_add (grp, req);
1375	++grp->length;
1376	req->grp = grp;
1377
1378	req->grp_prev = 0;
1379	req->grp_next = grp->grp_first;
1380
1381	if (grp->grp_first)
1382	grp->grp_first->grp_prev = req;
1383
1384	grp->grp_first = req;
1385	}	1208	}
1386	}
1387	}	1209	}
		1210
		1211	void
		1212	cancel_subs (aio_req_ornot req)
		1213	CODE:
		1214	req_cancel_subs (req);
1388		1215
1389	void	1216	void
1390	result (aio_req grp, ...)	1217	result (aio_req grp, ...)
1391	CODE:	1218	CODE:
1392	{	1219	{
1393	int i;	1220	int i;
		1221	AV *av;
		1222
		1223	grp->errorno = errno;
		1224
1394	AV *av = newAV ();	1225	av = newAV ();
		1226	av_extend (av, items - 1);
1395		1227
1396	for (i = 1; i < items; ++i )	1228	for (i = 1; i < items; ++i )
1397	av_push (av, newSVsv (ST (i)));	1229	av_push (av, newSVsv (ST (i)));
1398		1230
1399	SvREFCNT_dec (grp->data);	1231	SvREFCNT_dec (grp->sv1);
1400	grp->data = (SV *)av;	1232	grp->sv1 = (SV *)av;
1401	}	1233	}
1402		1234
1403	void	1235	void
		1236	errno (aio_req grp, int errorno = errno)
		1237	CODE:
		1238	grp->errorno = errorno;
		1239
		1240	void
1404	feed_limit (aio_req grp, int limit)	1241	limit (aio_req grp, int limit)
1405	CODE:	1242	CODE:
1406	grp->fd2 = limit;	1243	eio_grp_limit (grp, limit);
1407	aio_grp_feed (grp);
1408		1244
1409	void	1245	void
1410	feed (aio_req grp, SV *callback=&PL_sv_undef)	1246	feed (aio_req grp, SV *callback=&PL_sv_undef)
1411	CODE:	1247	CODE:
1412	{	1248	{
1413	SvREFCNT_dec (grp->fh2);	1249	SvREFCNT_dec (grp->sv2);
1414	grp->fh2 = newSVsv (callback);	1250	grp->sv2 = newSVsv (callback);
		1251	grp->feed = aio_grp_feed;
1415		1252
1416	if (grp->fd2 <= 0)	1253	if (grp->int2 <= 0)
1417	grp->fd2 = 2;	1254	grp->int2 = 2;
1418		1255
1419	aio_grp_feed (grp);	1256	eio_grp_limit (grp, grp->int2);
1420	}	1257	}
1421		1258

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