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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.79 by root, Thu Oct 26 16:28:33 2006 UTC vs.
Revision 1.116 by root, Sat May 10 19:25:33 2008 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"
18
19	#include <pthread.h>
20
21	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
22	#include <errno.h>	11	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	12	#include <sys/types.h>
26	#include <sys/stat.h>	13	#include <sys/stat.h>
27	#include <limits.h>	14	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	15	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	16	#include <sched.h>
32		17
33	#if HAVE_SENDFILE	18	#ifdef _WIN32
34	# if __linux	19
35	# include <sys/sendfile.h>	20	# define EIO_STRUCT_DIRENT Direntry_t
36	# elif __freebsd	21	# undef malloc
37	# include <sys/socket.h>	22	# undef free
38	# include <sys/uio.h>	23
39	# elif __hpux	24	// perl overrides all those nice win32 functions
40	# include <sys/socket.h>	25	# undef open
41	# elif __solaris /* not yet */	26	# undef read
42	# include <sys/sendfile.h>	27	# undef write
		28	# undef send
		29	# undef recv
		30	# undef stat
		31	# undef fstat
		32	# define lstat stat
		33	# undef truncate
		34	# undef ftruncate
		35	# undef open
		36	# undef close
		37	# undef unlink
		38	# undef rmdir
		39	# undef rename
		40	# undef lseek
		41
		42	# define chown(a,b,c) (errno = ENOSYS, -1)
		43	# define fchown(a,b,c) (errno = ENOSYS, -1)
		44	# define fchmod(a,b) (errno = ENOSYS, -1)
		45	# define symlink(a,b) (errno = ENOSYS, -1)
		46	# define readlink(a,b,c) (errno = ENOSYS, -1)
		47	# define mknod(a,b,c) (errno = ENOSYS, -1)
		48	# define truncate(a,b) (errno = ENOSYS, -1)
		49	# define ftruncate(fd,o) chsize ((fd), (o))
		50	# define fsync(fd) _commit (fd)
		51	# define opendir(fd) (errno = ENOSYS, 0)
		52	# define readdir(fd) (errno = ENOSYS, -1)
		53	# define closedir(fd) (errno = ENOSYS, -1)
		54	# define mkdir(a,b) mkdir (a)
		55
43	# else	56	#else
44	# error sendfile support requested but not available	57
45	# endif	58	# include <sys/time.h>
		59	# include <sys/select.h>
		60	# include <unistd.h>
		61	# include <utime.h>
		62	# include <signal.h>
		63	# define EIO_STRUCT_DIRENT struct dirent
		64
46	#endif	65	#endif
47		66
48	/* used for struct dirent, AIX doesn't provide it */	67	#define EIO_STRUCT_STAT Stat_t
49	#ifndef NAME_MAX	68
50	# define NAME_MAX 4096	69	/* use NV for 32 bit perls as it allows larger offsets */
		70	#if IVSIZE >= 8
		71	# define SvVAL64 SvIV
		72	#else
		73	# define SvVAL64 SvNV
51	#endif	74	#endif
52		75
53	#ifndef PTHREAD_STACK_MIN	76	static HV *stash;
54	/* care for broken platforms, e.g. windows */	77	typedef SV SV8; /* byte-sv, used for argument-checking */
55	# define PTHREAD_STACK_MIN 16384
56	#endif
57
58	#if __ia64
59	# define STACKSIZE 65536
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61	# define STACKSIZE PTHREAD_STACK_MIN
62	#else
63	# define STACKSIZE 16384
64	#endif
65
66	/* wether word reads are potentially non-atomic.
67	* this is conservatice, likely most arches this runs
68	* on have atomic word read/writes.
69	*/
70	#ifndef WORDREAD_UNSAFE
71	# if __i386 || __x86_64
72	# define WORDREAD_UNSAFE 0
73	# else
74	# define WORDREAD_UNSAFE 1
75	# endif
76	#endif
77
78	/* buffer size for various temporary buffers */
79	#define AIO_BUFSIZE 65536
80
81	#define dBUF \
82	char *aio_buf; \
83	LOCK (wrklock); \
84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
85	UNLOCK (wrklock); \
86	if (!aio_buf) \
87	return -1;
88
89	enum {
90	REQ_QUIT,
91	REQ_OPEN, REQ_CLOSE,
92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
93	REQ_SENDFILE,
94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
95	REQ_FSYNC, REQ_FDATASYNC,
96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
97	REQ_READDIR,
98	REQ_LINK, REQ_SYMLINK,
99	REQ_GROUP, REQ_NOP,
100	REQ_BUSY,
101	};
102		78
103	#define AIO_REQ_KLASS "IO::AIO::REQ"	79	#define AIO_REQ_KLASS "IO::AIO::REQ"
104	#define AIO_GRP_KLASS "IO::AIO::GRP"	80	#define AIO_GRP_KLASS "IO::AIO::GRP"
105		81
106	typedef struct aio_cb	82	#define EIO_COMMON \
107	{
108	struct aio_cb *volatile next;
109
110	SV *data, *callback;	83	SV *callback; \
111	SV *fh, *fh2;	84	SV *sv1, *sv2; \
112	void *dataptr, *data2ptr;
113	Stat_t *statdata;
114	off_t offset;
115	size_t length;
116	ssize_t result;
117
118	STRLEN dataoffset;	85	STRLEN stroffset; \
119	int type;	86	SV *self
120	int fd, fd2;
121	int errorno;
122	mode_t mode; /* open */
123		87
124	unsigned char flags;	88	#include "libeio/eio.h"
125	unsigned char pri;
126		89
127	SV *self; /* the perl counterpart of this request, if any */	90	static int req_invoke (eio_req *req);
128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	91	#define EIO_FINISH(req) req_invoke (req)
129	} aio_cb;	92	static void aio_grp_feed (eio_req *grp);
		93	#define EIO_FEED(req) aio_grp_feed (req)
		94	static void req_destroy (eio_req *grp);
		95	#define EIO_DESTROY(req) req_destroy (req)
130		96
131	enum {	97	enum {
132	FLAG_CANCELLED = 0x01,	98	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
133	};	99	};
134		100
		101	#include "libeio/eio.c"
		102
135	typedef aio_cb *aio_req;	103	typedef eio_req *aio_req;
136	typedef aio_cb *aio_req_ornot;	104	typedef eio_req *aio_req_ornot;
137		105
138	enum {	106	static int max_outstanding = 0;
139	PRI_MIN = -4,
140	PRI_MAX = 4,
141		107
142	DEFAULT_PRI = 0,
143	PRI_BIAS = -PRI_MIN,
144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
145	};
146
147	static int next_pri = DEFAULT_PRI + PRI_BIAS;	108	static int next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS;
148		109
149	static unsigned int started, wanted;	110	static int respipe_osf [2], respipe [2] = { -1, -1 };
150	static volatile unsigned int nreqs, nready, npending;
151	static volatile unsigned int max_outstanding = 0xffffffff;
152	static int respipe [2];
153		111
154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
156	#else
157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
158	#endif
159
160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
162
163	/* worker threads management */
164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
165
166	typedef struct worker {
167	/* locked by wrklock */
168	struct worker *prev, *next;
169
170	pthread_t tid;
171
172	/* locked by reslock, reqlock or wrklock */
173	aio_req req; /* currently processed request */
174	void *dbuf;
175	DIR *dirp;
176	} worker;
177
178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
179
180	static void worker_clear (worker *wrk)
181	{
182	if (wrk->dirp)
183	{
184	closedir (wrk->dirp);
185	wrk->dirp = 0;
186	}
187
188	if (wrk->dbuf)
189	{
190	free (wrk->dbuf);
191	wrk->dbuf = 0;
192	}
193	}
194
195	static void worker_free (worker *wrk)
196	{
197	wrk->next->prev = wrk->prev;
198	wrk->prev->next = wrk->next;
199
200	free (wrk);
201	}
202
203	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
204	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
205	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
206
207	/*
208	* a somewhat faster data structure might be nice, but
209	* with 8 priorities this actually needs <20 insns
210	* per shift, the most expensive operation.
211	*/
212	typedef struct {
213	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
214	int size;
215	} reqq;
216
217	static reqq req_queue;
218	static reqq res_queue;
219
220	int reqq_push (reqq *q, aio_req req)
221	{
222	int pri = req->pri;
223	req->next = 0;
224
225	if (q->qe[pri])
226	{
227	q->qe[pri]->next = req;
228	q->qe[pri] = req;
229	}
230	else
231	q->qe[pri] = q->qs[pri] = req;
232
233	return q->size++;
234	}
235
236	aio_req reqq_shift (reqq *q)
237	{
238	int pri;
239
240	if (!q->size)
241	return 0;
242
243	--q->size;
244
245	for (pri = NUM_PRI; pri--; )
246	{
247	aio_req req = q->qs[pri];
248
249	if (req)
250	{
251	if (!(q->qs[pri] = req->next))
252	q->qe[pri] = 0;
253
254	return req;
255	}
256	}
257
258	abort ();
259	}
260
261	static int poll_cb (int max);
262	static void req_invoke (aio_req req);
263	static void req_free (aio_req req);	112	static void req_destroy (aio_req req);
264	static void req_cancel (aio_req req);	113	static void req_cancel (aio_req req);
		114
		115	static void want_poll (void)
		116	{
		117	/* write a dummy byte to the pipe so fh becomes ready */
		118	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		119	}
		120
		121	static void done_poll (void)
		122	{
		123	/* read any signals sent by the worker threads */
		124	char buf [4];
		125	while (respipe_read (respipe [0], buf, 4) == 4)
		126	;
		127	}
265		128
266	/* must be called at most once */	129	/* must be called at most once */
267	static SV *req_sv (aio_req req, const char *klass)	130	static SV *req_sv (aio_req req, const char *klass)
268	{	131	{
269	if (!req->self)	132	if (!req->self)
…		…
287	return mg ? (aio_req)mg->mg_ptr : 0;	150	return mg ? (aio_req)mg->mg_ptr : 0;
288	}	151	}
289		152
290	static void aio_grp_feed (aio_req grp)	153	static void aio_grp_feed (aio_req grp)
291	{	154	{
292	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	155	if (grp->sv2 && SvOK (grp->sv2))
293	{	156	{
294	int old_len = grp->length;
295
296	if (grp->fh2 && SvOK (grp->fh2))
297	{
298	dSP;	157	dSP;
299		158
300	ENTER;	159	ENTER;
301	SAVETMPS;	160	SAVETMPS;
302	PUSHMARK (SP);	161	PUSHMARK (SP);
303	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	162	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
304	PUTBACK;	163	PUTBACK;
305	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	164	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
306	SPAGAIN;	165	SPAGAIN;
307	FREETMPS;	166	FREETMPS;
308	LEAVE;	167	LEAVE;
309	}
310
311	/* stop if no progress has been made */
312	if (old_len == grp->length)
313	{
314	SvREFCNT_dec (grp->fh2);
315	grp->fh2 = 0;
316	break;
317	}
318	}	168	}
319	}	169	}
320		170
321	static void aio_grp_dec (aio_req grp)
322	{
323	--grp->length;
324
325	/* call feeder, if applicable */
326	aio_grp_feed (grp);
327
328	/* finish, if done */
329	if (!grp->length && grp->fd)
330	{
331	req_invoke (grp);
332	req_free (grp);
333	}
334	}
335
336	static void poll_wait ()
337	{
338	fd_set rfd;
339
340	while (nreqs)
341	{
342	int size;
343	if (WORDREAD_UNSAFE) LOCK (reslock);
344	size = res_queue.size;
345	if (WORDREAD_UNSAFE) UNLOCK (reslock);
346
347	if (size)
348	return;
349
350	FD_ZERO(&rfd);
351	FD_SET(respipe [0], &rfd);
352
353	select (respipe [0] + 1, &rfd, 0, 0, 0);
354	}
355	}
356
357	static void req_invoke (aio_req req)	171	static int req_invoke (eio_req *req)
358	{	172	{
359	dSP;	173	dSP;
360		174
		175	if (req->flags & FLAG_SV2_RO_OFF)
		176	SvREADONLY_off (req->sv2);
		177
361	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	178	if (!EIO_CANCELLED (req) && SvOK (req->callback))
362	{	179	{
363	ENTER;	180	ENTER;
364	SAVETMPS;	181	SAVETMPS;
365	PUSHMARK (SP);	182	PUSHMARK (SP);
366	EXTEND (SP, 1);	183	EXTEND (SP, 1);
367		184
368	switch (req->type)	185	switch (req->type)
369	{	186	{
370	case REQ_READDIR:	187	case EIO_READDIR:
371	{	188	{
372	SV *rv = &PL_sv_undef;	189	SV *rv = &PL_sv_undef;
373		190
374	if (req->result >= 0)	191	if (req->result >= 0)
375	{	192	{
376	int i;	193	int i;
377	char *buf = req->data2ptr;	194	char *buf = req->ptr2;
378	AV *av = newAV ();	195	AV *av = newAV ();
379		196
380	av_extend (av, req->result - 1);	197	av_extend (av, req->result - 1);
381		198
382	for (i = 0; i < req->result; ++i)	199	for (i = 0; i < req->result; ++i)
…		…
392		209
393	PUSHs (rv);	210	PUSHs (rv);
394	}	211	}
395	break;	212	break;
396		213
397	case REQ_OPEN:	214	case EIO_OPEN:
398	{	215	{
399	/* convert fd to fh */	216	/* convert fd to fh */
400	SV *fh;	217	SV *fh = &PL_sv_undef;
401		218
402	PUSHs (sv_2mortal (newSViv (req->result)));	219	if (req->result >= 0)
403	PUTBACK;	220	{
404	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	221	GV *gv = (GV *)sv_newmortal ();
405	SPAGAIN;	222	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		223	char sym [64];
		224	int symlen;
		225
		226	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		227	gv_init (gv, stash, sym, symlen, 0);
406		228
407	fh = SvREFCNT_inc (POPs);	229	symlen = snprintf (
		230	sym,
		231	sizeof (sym),
		232	"%s&=%d",
		233	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		234	req->result
		235	);
408		236
		237	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		238	fh = (SV *)gv;
		239	}
		240
409	PUSHMARK (SP);	241	PUSHs (fh);
410	XPUSHs (sv_2mortal (fh));
411	}	242	}
412	break;	243	break;
413		244
414	case REQ_GROUP:	245	case EIO_GROUP:
415	req->fd = 2; /* mark group as finished */	246	req->int1 = 2; /* mark group as finished */
416		247
417	if (req->data)	248	if (req->sv1)
418	{	249	{
419	int i;	250	int i;
420	AV *av = (AV *)req->data;	251	AV *av = (AV *)req->sv1;
421		252
422	EXTEND (SP, AvFILL (av) + 1);	253	EXTEND (SP, AvFILL (av) + 1);
423	for (i = 0; i <= AvFILL (av); ++i)	254	for (i = 0; i <= AvFILL (av); ++i)
424	PUSHs (*av_fetch (av, i, 0));	255	PUSHs (*av_fetch (av, i, 0));
425	}	256	}
426	break;	257	break;
427		258
428	case REQ_NOP:	259	case EIO_NOP:
429	case REQ_BUSY:	260	case EIO_BUSY:
430	break;	261	break;
		262
		263	case EIO_READLINK:
		264	if (req->result > 0)
		265	{
		266	SvCUR_set (req->sv2, req->result);
		267	*SvEND (req->sv2) = 0;
		268	PUSHs (req->sv2);
		269	}
		270	break;
		271
		272	case EIO_STAT:
		273	case EIO_LSTAT:
		274	case EIO_FSTAT:
		275	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		276	PL_laststatval = req->result;
		277	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		278	PUSHs (sv_2mortal (newSViv (req->result)));
		279	break;
		280
		281	case EIO_READ:
		282	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		283	*SvEND (req->sv2) = 0;
		284	PUSHs (sv_2mortal (newSViv (req->result)));
		285	break;
		286
		287	case EIO_DUP2:
		288	if (req->result > 0)
		289	req->result = 0;
		290	/* FALLTHROUGH */
431		291
432	default:	292	default:
433	PUSHs (sv_2mortal (newSViv (req->result)));	293	PUSHs (sv_2mortal (newSViv (req->result)));
434	break;	294	break;
435	}	295	}
436		296
437	errno = req->errorno;	297	errno = req->errorno;
438		298
439	PUTBACK;	299	PUTBACK;
440	call_sv (req->callback, G_VOID | G_EVAL);	300	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
441	SPAGAIN;	301	SPAGAIN;
442		302
443	FREETMPS;	303	FREETMPS;
444	LEAVE;	304	LEAVE;
		305
		306	PUTBACK;
445	}	307	}
446		308
447	if (req->grp)	309	return !!SvTRUE (ERRSV);
448	{
449	aio_req grp = req->grp;
450
451	/* unlink request */
452	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
453	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
454
455	if (grp->grp_first == req)
456	grp->grp_first = req->grp_next;
457
458	aio_grp_dec (grp);
459	}
460
461	if (SvTRUE (ERRSV))
462	{
463	req_free (req);
464	croak (0);
465	}
466	}	310	}
467		311
468	static void req_free (aio_req req)	312	static void req_destroy (aio_req req)
469	{	313	{
470	if (req->self)	314	if (req->self)
471	{	315	{
472	sv_unmagic (req->self, PERL_MAGIC_ext);	316	sv_unmagic (req->self, PERL_MAGIC_ext);
473	SvREFCNT_dec (req->self);	317	SvREFCNT_dec (req->self);
474	}	318	}
475		319
476	SvREFCNT_dec (req->data);
477	SvREFCNT_dec (req->fh);	320	SvREFCNT_dec (req->sv1);
478	SvREFCNT_dec (req->fh2);	321	SvREFCNT_dec (req->sv2);
479	SvREFCNT_dec (req->callback);	322	SvREFCNT_dec (req->callback);
480	Safefree (req->statdata);
481
482	if (req->type == REQ_READDIR)
483	free (req->data2ptr);
484		323
485	Safefree (req);	324	Safefree (req);
486	}	325	}
487		326
488	static void req_cancel_subs (aio_req grp)	327	static void req_cancel_subs (aio_req grp)
489	{	328	{
490	aio_req sub;	329	aio_req sub;
491		330
492	if (grp->type != REQ_GROUP)	331	if (grp->type != EIO_GROUP)
493	return;	332	return;
494		333
495	SvREFCNT_dec (grp->fh2);	334	SvREFCNT_dec (grp->sv2);
496	grp->fh2 = 0;	335	grp->sv2 = 0;
497		336
498	for (sub = grp->grp_first; sub; sub = sub->grp_next)	337	eio_grp_cancel (grp);
499	req_cancel (sub);
500	}	338	}
501		339
502	static void req_cancel (aio_req req)	340	#ifdef USE_SOCKETS_AS_HANDLES
503	{	341	# define TO_SOCKET(x) (win32_get_osfhandle (x))
504	req->flags |= FLAG_CANCELLED;	342	#else
		343	# define TO_SOCKET(x) (x)
		344	#endif
505		345
506	req_cancel_subs (req);	346	static void
507	}	347	create_respipe (void)
508
509	static int poll_cb (int max)
510	{	348	{
511	dSP;	349	int old_readfd = respipe [0];
512	int count = 0;
513	int do_croak = 0;
514	aio_req req;
515		350
516	for (;;)	351	if (respipe [1] >= 0)
		352	respipe_close (TO_SOCKET (respipe [1]));
		353
		354	#ifdef _WIN32
		355	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		356	#else
		357	if (pipe (respipe))
		358	#endif
		359	croak ("unable to initialize result pipe");
		360
		361	if (old_readfd >= 0)
517	{	362	{
518	while (max <= 0 || count < max)	363	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
519	{	364	croak ("unable to initialize result pipe(2)");
520	LOCK (reslock);
521	req = reqq_shift (&res_queue);
522		365
523	if (req)	366	respipe_close (respipe [0]);
524	{	367	respipe [0] = old_readfd;
525	--npending;
526
527	if (!res_queue.size)
528	{
529	/* read any signals sent by the worker threads */
530	char buf [32];
531	while (read (respipe [0], buf, 32) == 32)
532	;
533	}
534	}
535
536	UNLOCK (reslock);
537
538	if (!req)
539	break;
540
541	--nreqs;
542
543	if (req->type == REQ_QUIT)
544	--started;
545	else if (req->type == REQ_GROUP && req->length)
546	{
547	req->fd = 1; /* mark request as delayed */
548	continue;
549	}
550	else
551	{
552	if (req->type == REQ_READ)
553	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
554
555	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
556	SvREADONLY_off (req->data);
557
558	if (req->statdata)
559	{
560	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
561	PL_laststatval = req->result;
562	PL_statcache = *(req->statdata);
563	}
564
565	req_invoke (req);
566
567	count++;
568	}
569
570	req_free (req);
571	}
572
573	if (nreqs <= max_outstanding)
574	break;
575
576	poll_wait ();
577
578	max = 0;
579	}	368	}
580		369
581	return count;	370	#ifdef _WIN32
582	}	371	int arg = 1;
		372	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		373	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		374	#else
		375	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		376	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		377	#endif
		378	croak ("unable to initialize result pipe(3)");
583		379
584	static void *aio_proc(void *arg);	380	respipe_osf [0] = TO_SOCKET (respipe [0]);
		381	respipe_osf [1] = TO_SOCKET (respipe [1]);
		382	}
585		383
586	static void start_thread (void)	384	static void poll_wait (void)
587	{	385	{
588	sigset_t fullsigset, oldsigset;	386	fd_set rfd;
589	pthread_attr_t attr;
590		387
591	worker *wrk = calloc (1, sizeof (worker));	388	while (eio_nreqs ())
592
593	if (!wrk)
594	croak ("unable to allocate worker thread data");
595
596	pthread_attr_init (&attr);
597	pthread_attr_setstacksize (&attr, STACKSIZE);
598	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
599
600	sigfillset (&fullsigset);
601
602	LOCK (wrklock);
603	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
604
605	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
606	{	389	{
607	wrk->prev = &wrk_first;	390	int size;
608	wrk->next = wrk_first.next;	391
609	wrk_first.next->prev = wrk;	392	X_LOCK (reslock);
610	wrk_first.next = wrk;	393	size = res_queue.size;
611	++started;	394	X_UNLOCK (reslock);
		395
		396	if (size)
		397	return;
		398
		399	maybe_start_thread ();
		400
		401	FD_ZERO (&rfd);
		402	FD_SET (respipe [0], &rfd);
		403
		404	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
612	}	405	}
613	else
614	free (wrk);
615
616	sigprocmask (SIG_SETMASK, &oldsigset, 0);
617	UNLOCK (wrklock);
618	}	406	}
619		407
620	static void req_send (aio_req req)	408	static int poll_cb (void)
621	{	409	{
622	while (started < wanted && nreqs >= started)	410	int res;
623	start_thread ();
624		411
625	++nreqs;	412	do
626
627	LOCK (reqlock);
628	++nready;
629	reqq_push (&req_queue, req);
630	pthread_cond_signal (&reqwait);
631	UNLOCK (reqlock);
632	}
633
634	static void end_thread (void)
635	{
636	aio_req req;
637
638	Newz (0, req, 1, aio_cb);
639
640	req->type = REQ_QUIT;
641	req->pri = PRI_MAX + PRI_BIAS;
642
643	req_send (req);
644	}
645
646	static void min_parallel (int nthreads)
647	{
648	if (wanted < nthreads)
649	wanted = nthreads;
650	}
651
652	static void max_parallel (int nthreads)
653	{
654	int cur = started;
655
656	if (wanted > nthreads)
657	wanted = nthreads;
658
659	while (cur > wanted)
660	{	413	{
661	end_thread ();	414	res = eio_poll ();
662	cur--;	415
		416	if (res > 0)
		417	croak (0);
663	}	418	}
664		419	while (max_outstanding && max_outstanding <= eio_nreqs ());
665	while (started > wanted)
666	{
667	poll_wait ();
668	poll_cb (0);
669	}
670	}
671
672	static void create_pipe ()
673	{
674	if (pipe (respipe))
675	croak ("unable to initialize result pipe");
676
677	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
678	croak ("cannot set result pipe to nonblocking mode");
679
680	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
681	croak ("cannot set result pipe to nonblocking mode");
682	}
683
684	/*****************************************************************************/
685	/* work around various missing functions */
686
687	#if !HAVE_PREADWRITE
688	# define pread aio_pread
689	# define pwrite aio_pwrite
690
691	/*
692	* make our pread/pwrite safe against themselves, but not against
693	* normal read/write by using a mutex. slows down execution a lot,
694	* but that's your problem, not mine.
695	*/
696	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
697
698	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
699	{
700	ssize_t res;
701	off_t ooffset;
702
703	LOCK (preadwritelock);
704	ooffset = lseek (fd, 0, SEEK_CUR);
705	lseek (fd, offset, SEEK_SET);
706	res = read (fd, buf, count);
707	lseek (fd, ooffset, SEEK_SET);
708	UNLOCK (preadwritelock);
709		420
710	return res;	421	return res;
711	}	422	}
712		423
713	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
714	{
715	ssize_t res;
716	off_t ooffset;
717
718	LOCK (preadwritelock);
719	ooffset = lseek (fd, 0, SEEK_CUR);
720	lseek (fd, offset, SEEK_SET);
721	res = write (fd, buf, count);
722	lseek (fd, offset, SEEK_SET);
723	UNLOCK (preadwritelock);
724
725	return res;
726	}
727	#endif
728
729	#if !HAVE_FDATASYNC
730	# define fdatasync fsync
731	#endif
732
733	#if !HAVE_READAHEAD
734	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
735
736	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
737	{
738	dBUF;
739
740	while (count > 0)
741	{
742	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
743
744	pread (fd, aio_buf, len, offset);
745	offset += len;
746	count -= len;
747	}
748
749	errno = 0;
750	}
751
752	#endif
753
754	#if !HAVE_READDIR_R
755	# define readdir_r aio_readdir_r
756
757	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
758
759	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
760	{
761	struct dirent *e;
762	int errorno;
763
764	LOCK (readdirlock);
765
766	e = readdir (dirp);
767	errorno = errno;
768
769	if (e)
770	{
771	*res = ent;
772	strcpy (ent->d_name, e->d_name);
773	}
774	else
775	*res = 0;
776
777	UNLOCK (readdirlock);
778
779	errno = errorno;
780	return e ? 0 : -1;
781	}
782	#endif
783
784	/* sendfile always needs emulation */
785	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
786	{
787	ssize_t res;
788
789	if (!count)
790	return 0;
791
792	#if HAVE_SENDFILE
793	# if __linux
794	res = sendfile (ofd, ifd, &offset, count);
795
796	# elif __freebsd
797	/*
798	* Of course, the freebsd sendfile is a dire hack with no thoughts
799	* wasted on making it similar to other I/O functions.
800	*/
801	{
802	off_t sbytes;
803	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
804
805	if (res < 0 && sbytes)
806	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
807	res = sbytes;
808	}
809
810	# elif __hpux
811	res = sendfile (ofd, ifd, offset, count, 0, 0);
812
813	# elif __solaris
814	{
815	struct sendfilevec vec;
816	size_t sbytes;
817
818	vec.sfv_fd = ifd;
819	vec.sfv_flag = 0;
820	vec.sfv_off = offset;
821	vec.sfv_len = count;
822
823	res = sendfilev (ofd, &vec, 1, &sbytes);
824
825	if (res < 0 && sbytes)
826	res = sbytes;
827	}
828
829	# endif
830	#else
831	res = -1;
832	errno = ENOSYS;
833	#endif
834
835	if (res < 0
836	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
837	#if __solaris
838	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
839	#endif
840	)
841	)
842	{
843	/* emulate sendfile. this is a major pain in the ass */
844	dBUF;
845
846	res = 0;
847
848	while (count)
849	{
850	ssize_t cnt;
851
852	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
853
854	if (cnt <= 0)
855	{
856	if (cnt && !res) res = -1;
857	break;
858	}
859
860	cnt = write (ofd, aio_buf, cnt);
861
862	if (cnt <= 0)
863	{
864	if (cnt && !res) res = -1;
865	break;
866	}
867
868	offset += cnt;
869	res += cnt;
870	count -= cnt;
871	}
872	}
873
874	return res;
875	}
876
877	/* read a full directory */
878	static void scandir_ (aio_req req, worker *self)
879	{
880	DIR *dirp;
881	union
882	{
883	struct dirent d;
884	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
885	} *u;
886	struct dirent *entp;
887	char *name, *names;
888	int memlen = 4096;
889	int memofs = 0;
890	int res = 0;
891	int errorno;
892
893	LOCK (wrklock);
894	self->dirp = dirp = opendir (req->dataptr);
895	self->dbuf = u = malloc (sizeof (*u));
896	req->data2ptr = names = malloc (memlen);
897	UNLOCK (wrklock);
898
899	if (dirp && u && names)
900	for (;;)
901	{
902	errno = 0;
903	readdir_r (dirp, &u->d, &entp);
904
905	if (!entp)
906	break;
907
908	name = entp->d_name;
909
910	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
911	{
912	int len = strlen (name) + 1;
913
914	res++;
915
916	while (memofs + len > memlen)
917	{
918	memlen *= 2;
919	LOCK (wrklock);
920	req->data2ptr = names = realloc (names, memlen);
921	UNLOCK (wrklock);
922
923	if (!names)
924	break;
925	}
926
927	memcpy (names + memofs, name, len);
928	memofs += len;
929	}
930	}
931
932	if (errno)
933	res = -1;
934
935	req->result = res;
936	}
937
938	/*****************************************************************************/
939
940	static void *aio_proc (void *thr_arg)
941	{
942	aio_req req;
943	int type;
944	worker *self = (worker *)thr_arg;
945
946	do
947	{
948	LOCK (reqlock);
949
950	for (;;)
951	{
952	self->req = req = reqq_shift (&req_queue);
953
954	if (req)
955	break;
956
957	pthread_cond_wait (&reqwait, &reqlock);
958	}
959
960	--nready;
961
962	UNLOCK (reqlock);
963
964	errno = 0; /* strictly unnecessary */
965	type = req->type; /* remember type for QUIT check */
966
967	if (!(req->flags & FLAG_CANCELLED))
968	switch (type)
969	{
970	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
971	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
972
973	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
974	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
975
976	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
977	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
978	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
979
980	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
981	case REQ_CLOSE: req->result = close (req->fd); break;
982	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
983	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
984	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
985	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
986	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
987
988	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
989	case REQ_FSYNC: req->result = fsync (req->fd); break;
990	case REQ_READDIR: scandir_ (req, self); break;
991
992	case REQ_BUSY:
993	{
994	struct timeval tv;
995
996	tv.tv_sec = req->fd;
997	tv.tv_usec = req->fd2;
998
999	req->result = select (0, 0, 0, 0, &tv);
1000	}
1001
1002	case REQ_GROUP:
1003	case REQ_NOP:
1004	case REQ_QUIT:
1005	break;
1006
1007	default:
1008	req->result = ENOSYS;
1009	break;
1010	}
1011
1012	req->errorno = errno;
1013
1014	LOCK (reslock);
1015
1016	++npending;
1017
1018	if (!reqq_push (&res_queue, req))
1019	/* write a dummy byte to the pipe so fh becomes ready */
1020	write (respipe [1], &respipe, 1);
1021
1022	self->req = 0;
1023	worker_clear (self);
1024
1025	UNLOCK (reslock);
1026	}
1027	while (type != REQ_QUIT);
1028
1029	LOCK (wrklock);
1030	worker_free (self);
1031	UNLOCK (wrklock);
1032
1033	return 0;
1034	}
1035
1036	/*****************************************************************************/
1037
1038	static void atfork_prepare (void)
1039	{
1040	LOCK (wrklock);
1041	LOCK (reqlock);
1042	LOCK (reslock);
1043	#if !HAVE_PREADWRITE
1044	LOCK (preadwritelock);
1045	#endif
1046	#if !HAVE_READDIR_R
1047	LOCK (readdirlock);
1048	#endif
1049	}
1050
1051	static void atfork_parent (void)
1052	{
1053	#if !HAVE_READDIR_R
1054	UNLOCK (readdirlock);
1055	#endif
1056	#if !HAVE_PREADWRITE
1057	UNLOCK (preadwritelock);
1058	#endif
1059	UNLOCK (reslock);
1060	UNLOCK (reqlock);
1061	UNLOCK (wrklock);
1062	}
1063
1064	static void atfork_child (void)	424	static void atfork_child (void)
1065	{	425	{
1066	aio_req prv;
1067
1068	while (prv = reqq_shift (&req_queue))
1069	req_free (prv);
1070
1071	while (prv = reqq_shift (&res_queue))
1072	req_free (prv);
1073
1074	while (wrk_first.next != &wrk_first)
1075	{
1076	worker *wrk = wrk_first.next;
1077
1078	if (wrk->req)
1079	req_free (wrk->req);
1080
1081	worker_clear (wrk);
1082	worker_free (wrk);
1083	}
1084
1085	started = 0;
1086	nreqs = 0;
1087
1088	close (respipe [0]);
1089	close (respipe [1]);
1090	create_pipe ();	426	create_respipe ();
1091
1092	atfork_parent ();
1093	}	427	}
1094		428
1095	#define dREQ \	429	#define dREQ \
1096	aio_req req; \	430	aio_req req; \
1097	int req_pri = next_pri; \	431	int req_pri = next_pri; \
1098	next_pri = DEFAULT_PRI + PRI_BIAS; \	432	next_pri = EIO_DEFAULT_PRI + EIO_PRI_BIAS; \
1099	\	433	\
1100	if (SvOK (callback) && !SvROK (callback)) \	434	if (SvOK (callback) && !SvROK (callback)) \
1101	croak ("callback must be undef or of reference type"); \	435	croak ("callback must be undef or of reference type"); \
1102	\	436	\
1103	Newz (0, req, 1, aio_cb); \	437	Newz (0, req, 1, eio_req); \
1104	if (!req) \	438	if (!req) \
1105	croak ("out of memory during aio_req allocation"); \	439	croak ("out of memory during eio_req allocation"); \
1106	\	440	\
1107	req->callback = newSVsv (callback); \	441	req->callback = newSVsv (callback); \
1108	req->pri = req_pri	442	req->pri = req_pri
1109		443
1110	#define REQ_SEND \	444	#define REQ_SEND \
1111	req_send (req); \	445	eio_submit (req); \
1112	\	446	\
1113	if (GIMME_V != G_VOID) \	447	if (GIMME_V != G_VOID) \
1114	XPUSHs (req_sv (req, AIO_REQ_KLASS));	448	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1115		449
1116	MODULE = IO::AIO PACKAGE = IO::AIO	450	MODULE = IO::AIO PACKAGE = IO::AIO
1117		451
1118	PROTOTYPES: ENABLE	452	PROTOTYPES: ENABLE
1119		453
1120	BOOT:	454	BOOT:
1121	{	455	{
1122	HV *stash = gv_stashpv ("IO::AIO", 1);	456	stash = gv_stashpv ("IO::AIO", 1);
		457
1123	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	458	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1124	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	459	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1125	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	460	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		461	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		462	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		463	#ifdef _WIN32
		464	X_MUTEX_CHECK (wrklock);
		465	X_MUTEX_CHECK (reslock);
		466	X_MUTEX_CHECK (reqlock);
		467	X_MUTEX_CHECK (reqwait);
		468	X_MUTEX_CHECK (preadwritelock);
		469	X_MUTEX_CHECK (readdirlock);
1126		470
1127	create_pipe ();	471	X_COND_CHECK (reqwait);
1128	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	472	#else
		473	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		474	#endif
		475
		476	create_respipe ();
		477
		478	if (eio_init (want_poll, done_poll) < 0)
		479	croak ("IO::AIO: unable to initialise eio library");
		480
		481	/* atfork child called in fifo order, so before eio's handler */
		482	X_THREAD_ATFORK (0, 0, atfork_child);
1129	}	483	}
		484
		485	void
		486	max_poll_reqs (int nreqs)
		487	PROTOTYPE: $
		488	CODE:
		489	eio_set_max_poll_reqs (nreqs);
		490
		491	void
		492	max_poll_time (double nseconds)
		493	PROTOTYPE: $
		494	CODE:
		495	eio_set_max_poll_time (nseconds);
1130		496
1131	void	497	void
1132	min_parallel (int nthreads)	498	min_parallel (int nthreads)
1133	PROTOTYPE: $	499	PROTOTYPE: $
		500	CODE:
		501	eio_set_min_parallel (nthreads);
1134		502
1135	void	503	void
1136	max_parallel (int nthreads)	504	max_parallel (int nthreads)
1137	PROTOTYPE: $	505	PROTOTYPE: $
		506	CODE:
		507	eio_set_max_parallel (nthreads);
1138		508
1139	int	509	void
		510	max_idle (int nthreads)
		511	PROTOTYPE: $
		512	CODE:
		513	eio_set_max_idle (nthreads);
		514
		515	void
1140	max_outstanding (int maxreqs)	516	max_outstanding (int maxreqs)
1141	PROTOTYPE: $	517	PROTOTYPE: $
1142	CODE:	518	CODE:
1143	RETVAL = max_outstanding;
1144	max_outstanding = maxreqs;	519	max_outstanding = maxreqs;
1145	OUTPUT:
1146	RETVAL
1147		520
1148	void	521	void
1149	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	522	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1150	SV * pathname
1151	int flags
1152	int mode
1153	SV * callback
1154	PROTOTYPE: $$$;$	523	PROTOTYPE: $$$;$
1155	PPCODE:	524	PPCODE:
1156	{	525	{
1157	dREQ;	526	dREQ;
1158		527
1159	req->type = REQ_OPEN;	528	req->type = EIO_OPEN;
1160	req->data = newSVsv (pathname);	529	req->sv1 = newSVsv (pathname);
1161	req->dataptr = SvPVbyte_nolen (req->data);	530	req->ptr1 = SvPVbyte_nolen (req->sv1);
1162	req->fd = flags;	531	req->int1 = flags;
1163	req->mode = mode;	532	req->int2 = mode;
1164		533
1165	REQ_SEND;	534	REQ_SEND;
1166	}	535	}
1167		536
1168	void	537	void
1169	aio_close (fh,callback=&PL_sv_undef)	538	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1170	SV * fh
1171	SV * callback
1172	PROTOTYPE: $;$	539	PROTOTYPE: $;$
1173	ALIAS:	540	ALIAS:
1174	aio_close = REQ_CLOSE
1175	aio_fsync = REQ_FSYNC	541	aio_fsync = EIO_FSYNC
1176	aio_fdatasync = REQ_FDATASYNC	542	aio_fdatasync = EIO_FDATASYNC
1177	PPCODE:	543	PPCODE:
1178	{	544	{
1179	dREQ;	545	dREQ;
1180		546
1181	req->type = ix;	547	req->type = ix;
1182	req->fh = newSVsv (fh);	548	req->sv1 = newSVsv (fh);
1183	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	549	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1184		550
1185	REQ_SEND (req);	551	REQ_SEND (req);
1186	}	552	}
1187		553
1188	void	554	void
		555	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		556	PROTOTYPE: $;$
		557	PPCODE:
		558	{
		559	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		560	dREQ;
		561
		562	if (close_pipe < 0)
		563	{
		564	int pipefd [2];
		565
		566	if (pipe (pipefd) < 0
		567	|| close (pipefd [1]) < 0
		568	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		569	abort (); /*D*/
		570
		571	close_pipe = pipefd [0];
		572	}
		573
		574	req->type = EIO_DUP2;
		575	req->int1 = close_pipe;
		576	req->sv2 = newSVsv (fh);
		577	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		578
		579	REQ_SEND (req);
		580	}
		581
		582	void
1189	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	583	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1190	SV * fh
1191	UV offset
1192	UV length
1193	SV * data
1194	UV dataoffset
1195	SV * callback
1196	ALIAS:	584	ALIAS:
1197	aio_read = REQ_READ	585	aio_read = EIO_READ
1198	aio_write = REQ_WRITE	586	aio_write = EIO_WRITE
1199	PROTOTYPE: $$$$$;$	587	PROTOTYPE: $$$$$;$
1200	PPCODE:	588	PPCODE:
1201	{	589	{
1202	aio_req req;
1203	STRLEN svlen;	590	STRLEN svlen;
1204	char *svptr = SvPVbyte (data, svlen);	591	char *svptr = SvPVbyte (data, svlen);
		592	UV len = SvUV (length);
1205		593
1206	SvUPGRADE (data, SVt_PV);	594	SvUPGRADE (data, SVt_PV);
1207	SvPOK_on (data);	595	SvPOK_on (data);
1208		596
1209	if (dataoffset < 0)	597	if (dataoffset < 0)
1210	dataoffset += svlen;	598	dataoffset += svlen;
1211		599
1212	if (dataoffset < 0 || dataoffset > svlen)	600	if (dataoffset < 0 || dataoffset > svlen)
1213	croak ("data offset outside of string");	601	croak ("dataoffset outside of data scalar");
1214		602
1215	if (ix == REQ_WRITE)	603	if (ix == EIO_WRITE)
1216	{	604	{
1217	/* write: check length and adjust. */	605	/* write: check length and adjust. */
1218	if (length < 0 || length + dataoffset > svlen)	606	if (!SvOK (length) || len + dataoffset > svlen)
1219	length = svlen - dataoffset;	607	len = svlen - dataoffset;
1220	}	608	}
1221	else	609	else
1222	{	610	{
1223	/* read: grow scalar as necessary */	611	/* read: grow scalar as necessary */
1224	svptr = SvGROW (data, length + dataoffset);	612	svptr = SvGROW (data, len + dataoffset + 1);
1225	}	613	}
1226		614
1227	if (length < 0)	615	if (len < 0)
1228	croak ("length must not be negative");	616	croak ("length must not be negative");
1229		617
1230	{	618	{
1231	dREQ;	619	dREQ;
1232		620
1233	req->type = ix;	621	req->type = ix;
1234	req->fh = newSVsv (fh);	622	req->sv1 = newSVsv (fh);
1235	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	623	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1236	: IoOFP (sv_2io (fh)));	624	: IoOFP (sv_2io (fh)));
		625	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1237	req->offset = offset;	626	req->size = len;
1238	req->length = length;
1239	req->data = SvREFCNT_inc (data);	627	req->sv2 = SvREFCNT_inc (data);
1240	req->dataptr = (char *)svptr + dataoffset;	628	req->ptr2 = (char *)svptr + dataoffset;
		629	req->stroffset = dataoffset;
1241		630
1242	if (!SvREADONLY (data))	631	if (!SvREADONLY (data))
1243	{	632	{
1244	SvREADONLY_on (data);	633	SvREADONLY_on (data);
1245	req->data2ptr = (void *)data;	634	req->flags |= FLAG_SV2_RO_OFF;
1246	}	635	}
1247		636
1248	REQ_SEND;	637	REQ_SEND;
1249	}	638	}
1250	}	639	}
1251		640
1252	void	641	void
		642	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		643	PROTOTYPE: $$;$
		644	PPCODE:
		645	{
		646	SV *data;
		647	dREQ;
		648
		649	data = newSV (NAME_MAX);
		650	SvPOK_on (data);
		651
		652	req->type = EIO_READLINK;
		653	req->sv1 = newSVsv (path);
		654	req->ptr1 = SvPVbyte_nolen (req->sv1);
		655	req->sv2 = data;
		656	req->ptr2 = SvPVbyte_nolen (data);
		657
		658	REQ_SEND;
		659	}
		660
		661	void
1253	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	662	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1254	SV * out_fh
1255	SV * in_fh
1256	UV in_offset
1257	UV length
1258	SV * callback
1259	PROTOTYPE: $$$$;$	663	PROTOTYPE: $$$$;$
1260	PPCODE:	664	PPCODE:
1261	{	665	{
1262	dREQ;	666	dREQ;
1263		667
1264	req->type = REQ_SENDFILE;	668	req->type = EIO_SENDFILE;
1265	req->fh = newSVsv (out_fh);	669	req->sv1 = newSVsv (out_fh);
1266	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	670	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1267	req->fh2 = newSVsv (in_fh);	671	req->sv2 = newSVsv (in_fh);
1268	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	672	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1269	req->offset = in_offset;	673	req->offs = SvVAL64 (in_offset);
1270	req->length = length;	674	req->size = length;
1271		675
1272	REQ_SEND;	676	REQ_SEND;
1273	}	677	}
1274		678
1275	void	679	void
1276	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	680	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1277	SV * fh
1278	UV offset
1279	IV length
1280	SV * callback
1281	PROTOTYPE: $$$;$	681	PROTOTYPE: $$$;$
1282	PPCODE:	682	PPCODE:
1283	{	683	{
1284	dREQ;	684	dREQ;
1285		685
1286	req->type = REQ_READAHEAD;	686	req->type = EIO_READAHEAD;
1287	req->fh = newSVsv (fh);	687	req->sv1 = newSVsv (fh);
1288	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	688	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1289	req->offset = offset;	689	req->offs = SvVAL64 (offset);
1290	req->length = length;	690	req->size = length;
1291		691
1292	REQ_SEND;	692	REQ_SEND;
1293	}	693	}
1294		694
1295	void	695	void
1296	aio_stat (fh_or_path,callback=&PL_sv_undef)	696	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1297	SV * fh_or_path
1298	SV * callback
1299	ALIAS:	697	ALIAS:
1300	aio_stat = REQ_STAT	698	aio_stat = EIO_STAT
1301	aio_lstat = REQ_LSTAT	699	aio_lstat = EIO_LSTAT
1302	PPCODE:	700	PPCODE:
1303	{	701	{
1304	dREQ;	702	dREQ;
1305		703
1306	New (0, req->statdata, 1, Stat_t);	704	req->ptr2 = malloc (sizeof (EIO_STRUCT_STAT));
1307	if (!req->statdata)	705	if (!req->ptr2)
1308	{	706	{
1309	req_free (req);	707	req_destroy (req);
1310	croak ("out of memory during aio_req->statdata allocation");	708	croak ("out of memory during aio_stat statdata allocation");
1311	}	709	}
		710
		711	req->flags |= EIO_FLAG_PTR2_FREE;
		712	req->sv1 = newSVsv (fh_or_path);
1312		713
1313	if (SvPOK (fh_or_path))	714	if (SvPOK (fh_or_path))
1314	{	715	{
1315	req->type = ix;	716	req->type = ix;
1316	req->data = newSVsv (fh_or_path);
1317	req->dataptr = SvPVbyte_nolen (req->data);	717	req->ptr1 = SvPVbyte_nolen (req->sv1);
1318	}	718	}
1319	else	719	else
1320	{	720	{
1321	req->type = REQ_FSTAT;	721	req->type = EIO_FSTAT;
1322	req->fh = newSVsv (fh_or_path);
1323	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	722	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1324	}	723	}
1325		724
1326	REQ_SEND;	725	REQ_SEND;
1327	}	726	}
1328		727
1329	void	728	void
		729	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		730	PPCODE:
		731	{
		732	dREQ;
		733
		734	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		735	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		736	req->sv1 = newSVsv (fh_or_path);
		737
		738	if (SvPOK (fh_or_path))
		739	{
		740	req->type = EIO_UTIME;
		741	req->ptr1 = SvPVbyte_nolen (req->sv1);
		742	}
		743	else
		744	{
		745	req->type = EIO_FUTIME;
		746	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		747	}
		748
		749	REQ_SEND;
		750	}
		751
		752	void
		753	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		754	PPCODE:
		755	{
		756	dREQ;
		757
		758	req->sv1 = newSVsv (fh_or_path);
		759	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		760
		761	if (SvPOK (fh_or_path))
		762	{
		763	req->type = EIO_TRUNCATE;
		764	req->ptr1 = SvPVbyte_nolen (req->sv1);
		765	}
		766	else
		767	{
		768	req->type = EIO_FTRUNCATE;
		769	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		770	}
		771
		772	REQ_SEND;
		773	}
		774
		775	void
		776	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		777	ALIAS:
		778	aio_chmod = EIO_CHMOD
		779	aio_fchmod = EIO_FCHMOD
		780	aio_mkdir = EIO_MKDIR
		781	PPCODE:
		782	{
		783	dREQ;
		784
		785	req->type = ix;
		786	req->int2 = mode;
		787	req->sv1 = newSVsv (fh_or_path);
		788
		789	if (ix == EIO_FCHMOD)
		790	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		791	else
		792	req->ptr1 = SvPVbyte_nolen (req->sv1);
		793
		794	REQ_SEND;
		795	}
		796
		797	void
		798	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		799	PPCODE:
		800	{
		801	dREQ;
		802
		803	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		804	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		805	req->sv1 = newSVsv (fh_or_path);
		806
		807	if (SvPOK (fh_or_path))
		808	{
		809	req->type = EIO_CHOWN;
		810	req->ptr1 = SvPVbyte_nolen (req->sv1);
		811	}
		812	else
		813	{
		814	req->type = EIO_FCHOWN;
		815	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		816	}
		817
		818	REQ_SEND;
		819	}
		820
		821	void
1330	aio_unlink (pathname,callback=&PL_sv_undef)	822	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1331	SV * pathname
1332	SV * callback
1333	ALIAS:	823	ALIAS:
1334	aio_unlink = REQ_UNLINK	824	aio_unlink = EIO_UNLINK
1335	aio_rmdir = REQ_RMDIR	825	aio_rmdir = EIO_RMDIR
1336	aio_readdir = REQ_READDIR	826	aio_readdir = EIO_READDIR
1337	PPCODE:	827	PPCODE:
1338	{	828	{
1339	dREQ;	829	dREQ;
1340		830
1341	req->type = ix;	831	req->type = ix;
1342	req->data = newSVsv (pathname);	832	req->sv1 = newSVsv (pathname);
1343	req->dataptr = SvPVbyte_nolen (req->data);	833	req->ptr1 = SvPVbyte_nolen (req->sv1);
		834
		835	REQ_SEND;
		836	}
		837
		838	void
		839	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		840	ALIAS:
		841	aio_link = EIO_LINK
		842	aio_symlink = EIO_SYMLINK
		843	aio_rename = EIO_RENAME
		844	PPCODE:
		845	{
		846	dREQ;
		847
		848	req->type = ix;
		849	req->sv1 = newSVsv (oldpath);
		850	req->ptr1 = SvPVbyte_nolen (req->sv1);
		851	req->sv2 = newSVsv (newpath);
		852	req->ptr2 = SvPVbyte_nolen (req->sv2);
1344		853
1345	REQ_SEND;	854	REQ_SEND;
1346	}	855	}
1347		856
1348	void	857	void
1349	aio_link (oldpath,newpath,callback=&PL_sv_undef)	858	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1350	SV * oldpath
1351	SV * newpath
1352	SV * callback
1353	ALIAS:
1354	aio_link = REQ_LINK
1355	aio_symlink = REQ_SYMLINK
1356	aio_rename = REQ_RENAME
1357	PPCODE:	859	PPCODE:
1358	{	860	{
1359	dREQ;	861	dREQ;
1360		862
1361	req->type = ix;	863	req->type = EIO_MKNOD;
1362	req->fh = newSVsv (oldpath);	864	req->sv1 = newSVsv (pathname);
1363	req->data2ptr = SvPVbyte_nolen (req->fh);	865	req->ptr1 = SvPVbyte_nolen (req->sv1);
1364	req->data = newSVsv (newpath);	866	req->int2 = (mode_t)mode;
1365	req->dataptr = SvPVbyte_nolen (req->data);	867	req->offs = dev;
1366		868
1367	REQ_SEND;	869	REQ_SEND;
1368	}	870	}
1369		871
1370	void	872	void
1371	aio_busy (delay,callback=&PL_sv_undef)	873	aio_busy (double delay, SV *callback=&PL_sv_undef)
1372	double delay
1373	SV * callback
1374	PPCODE:	874	PPCODE:
1375	{	875	{
1376	dREQ;	876	dREQ;
1377		877
1378	req->type = REQ_BUSY;	878	req->type = EIO_BUSY;
1379	req->fd = delay < 0. ? 0 : delay;	879	req->nv1 = delay < 0. ? 0. : delay;
1380	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1381		880
1382	REQ_SEND;	881	REQ_SEND;
1383	}	882	}
1384		883
1385	void	884	void
1386	aio_group (callback=&PL_sv_undef)	885	aio_group (SV *callback=&PL_sv_undef)
1387	SV * callback
1388	PROTOTYPE: ;$	886	PROTOTYPE: ;$
1389	PPCODE:	887	PPCODE:
1390	{	888	{
1391	dREQ;	889	dREQ;
1392		890
1393	req->type = REQ_GROUP;	891	req->type = EIO_GROUP;
		892
1394	req_send (req);	893	eio_submit (req);
1395
1396	XPUSHs (req_sv (req, AIO_GRP_KLASS));	894	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1397	}	895	}
1398		896
1399	void	897	void
1400	aio_nop (callback=&PL_sv_undef)	898	aio_nop (SV *callback=&PL_sv_undef)
1401	SV * callback	899	ALIAS:
		900	aio_nop = EIO_NOP
		901	aio_sync = EIO_SYNC
1402	PPCODE:	902	PPCODE:
1403	{	903	{
1404	dREQ;	904	dREQ;
1405		905
1406	req->type = REQ_NOP;	906	req->type = ix;
1407		907
1408	REQ_SEND;	908	REQ_SEND;
1409	}	909	}
1410		910
1411	int	911	int
1412	aioreq_pri (int pri = 0)	912	aioreq_pri (int pri = 0)
1413	PROTOTYPE: ;$	913	PROTOTYPE: ;$
1414	CODE:	914	CODE:
1415	RETVAL = next_pri - PRI_BIAS;	915	RETVAL = next_pri - EIO_PRI_BIAS;
1416	if (items > 0)	916	if (items > 0)
1417	{	917	{
1418	if (pri < PRI_MIN) pri = PRI_MIN;	918	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1419	if (pri > PRI_MAX) pri = PRI_MAX;	919	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1420	next_pri = pri + PRI_BIAS;	920	next_pri = pri + EIO_PRI_BIAS;
1421	}	921	}
1422	OUTPUT:	922	OUTPUT:
1423	RETVAL	923	RETVAL
1424		924
1425	void	925	void
1426	aioreq_nice (int nice = 0)	926	aioreq_nice (int nice = 0)
1427	CODE:	927	CODE:
1428	nice = next_pri - nice;	928	nice = next_pri - nice;
1429	if (nice < PRI_MIN) nice = PRI_MIN;	929	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1430	if (nice > PRI_MAX) nice = PRI_MAX;	930	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1431	next_pri = nice + PRI_BIAS;	931	next_pri = nice + EIO_PRI_BIAS;
1432		932
1433	void	933	void
1434	flush ()	934	flush ()
1435	PROTOTYPE:	935	PROTOTYPE:
1436	CODE:	936	CODE:
1437	while (nreqs)	937	while (eio_nreqs ())
1438	{	938	{
1439	poll_wait ();	939	poll_wait ();
1440	poll_cb (0);	940	poll_cb ();
1441	}	941	}
1442		942
1443	void	943	int
1444	poll()	944	poll()
1445	PROTOTYPE:	945	PROTOTYPE:
1446	CODE:	946	CODE:
1447	if (nreqs)
1448	{
1449	poll_wait ();	947	poll_wait ();
1450	poll_cb (0);	948	RETVAL = poll_cb ();
1451	}	949	OUTPUT:
		950	RETVAL
1452		951
1453	int	952	int
1454	poll_fileno()	953	poll_fileno()
1455	PROTOTYPE:	954	PROTOTYPE:
1456	CODE:	955	CODE:
…		…
1460		959
1461	int	960	int
1462	poll_cb(...)	961	poll_cb(...)
1463	PROTOTYPE:	962	PROTOTYPE:
1464	CODE:	963	CODE:
1465	RETVAL = poll_cb (0);	964	RETVAL = poll_cb ();
1466	OUTPUT:	965	OUTPUT:
1467	RETVAL	966	RETVAL
1468		967
1469	int
1470	poll_some(int max = 0)
1471	PROTOTYPE: $
1472	CODE:
1473	RETVAL = poll_cb (max);
1474	OUTPUT:
1475	RETVAL
1476
1477	void	968	void
1478	poll_wait()	969	poll_wait()
1479	PROTOTYPE:	970	PROTOTYPE:
1480	CODE:	971	CODE:
1481	if (nreqs)
1482	poll_wait ();	972	poll_wait ();
1483		973
1484	int	974	int
1485	nreqs()	975	nreqs()
1486	PROTOTYPE:	976	PROTOTYPE:
1487	CODE:	977	CODE:
1488	RETVAL = nreqs;	978	RETVAL = eio_nreqs ();
1489	OUTPUT:	979	OUTPUT:
1490	RETVAL	980	RETVAL
1491		981
1492	int	982	int
1493	nready()	983	nready()
1494	PROTOTYPE:	984	PROTOTYPE:
1495	CODE:	985	CODE:
1496	if (WORDREAD_UNSAFE) LOCK (reqlock);
1497	RETVAL = nready;	986	RETVAL = eio_nready ();
1498	if (WORDREAD_UNSAFE) UNLOCK (reqlock);
1499	OUTPUT:	987	OUTPUT:
1500	RETVAL	988	RETVAL
1501		989
1502	int	990	int
1503	npending()	991	npending()
1504	PROTOTYPE:	992	PROTOTYPE:
1505	CODE:	993	CODE:
1506	if (WORDREAD_UNSAFE) LOCK (reslock);
1507	RETVAL = npending;	994	RETVAL = eio_npending ();
1508	if (WORDREAD_UNSAFE) UNLOCK (reslock);
1509	OUTPUT:	995	OUTPUT:
1510	RETVAL	996	RETVAL
1511		997
		998	int
		999	nthreads()
		1000	PROTOTYPE:
		1001	CODE:
		1002	if (WORDACCESS_UNSAFE) X_LOCK (wrklock);
		1003	RETVAL = started;
		1004	if (WORDACCESS_UNSAFE) X_UNLOCK (wrklock);
		1005	OUTPUT:
		1006	RETVAL
		1007
1512	PROTOTYPES: DISABLE	1008	PROTOTYPES: DISABLE
1513		1009
1514	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1010	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1515		1011
1516	void	1012	void
1517	cancel (aio_req_ornot req)	1013	cancel (aio_req_ornot req)
1518	CODE:	1014	CODE:
1519	req_cancel (req);	1015	eio_cancel (req);
1520		1016
1521	void	1017	void
1522	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1018	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1523	CODE:	1019	CODE:
1524	SvREFCNT_dec (req->callback);	1020	SvREFCNT_dec (req->callback);
…		…
1529	void	1025	void
1530	add (aio_req grp, ...)	1026	add (aio_req grp, ...)
1531	PPCODE:	1027	PPCODE:
1532	{	1028	{
1533	int i;	1029	int i;
1534	aio_req req;
1535		1030
1536	if (grp->fd == 2)	1031	if (grp->int1 == 2)
1537	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1032	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1538		1033
1539	for (i = 1; i < items; ++i )	1034	for (i = 1; i < items; ++i )
1540	{	1035	{
		1036	aio_req req;
		1037
1541	if (GIMME_V != G_VOID)	1038	if (GIMME_V != G_VOID)
1542	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1039	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1543		1040
1544	req = SvAIO_REQ (ST (i));	1041	req = SvAIO_REQ (ST (i));
1545		1042
1546	if (req)	1043	if (req)
1547	{	1044	eio_grp_add (grp, req);
1548	++grp->length;
1549	req->grp = grp;
1550
1551	req->grp_prev = 0;
1552	req->grp_next = grp->grp_first;
1553
1554	if (grp->grp_first)
1555	grp->grp_first->grp_prev = req;
1556
1557	grp->grp_first = req;
1558	}
1559	}	1045	}
1560	}	1046	}
1561		1047
1562	void	1048	void
1563	cancel_subs (aio_req_ornot req)	1049	cancel_subs (aio_req_ornot req)
…		…
1576	av = newAV ();	1062	av = newAV ();
1577		1063
1578	for (i = 1; i < items; ++i )	1064	for (i = 1; i < items; ++i )
1579	av_push (av, newSVsv (ST (i)));	1065	av_push (av, newSVsv (ST (i)));
1580		1066
1581	SvREFCNT_dec (grp->data);	1067	SvREFCNT_dec (grp->sv1);
1582	grp->data = (SV *)av;	1068	grp->sv1 = (SV *)av;
1583	}	1069	}
1584		1070
1585	void	1071	void
1586	errno (aio_req grp, int errorno = errno)	1072	errno (aio_req grp, int errorno = errno)
1587	CODE:	1073	CODE:
1588	grp->errorno = errorno;	1074	grp->errorno = errorno;
1589		1075
1590	void	1076	void
1591	limit (aio_req grp, int limit)	1077	limit (aio_req grp, int limit)
1592	CODE:	1078	CODE:
1593	grp->fd2 = limit;	1079	eio_grp_limit (grp, limit);
1594	aio_grp_feed (grp);
1595		1080
1596	void	1081	void
1597	feed (aio_req grp, SV *callback=&PL_sv_undef)	1082	feed (aio_req grp, SV *callback=&PL_sv_undef)
1598	CODE:	1083	CODE:
1599	{	1084	{
1600	SvREFCNT_dec (grp->fh2);	1085	SvREFCNT_dec (grp->sv2);
1601	grp->fh2 = newSVsv (callback);	1086	grp->sv2 = newSVsv (callback);
1602		1087
1603	if (grp->fd2 <= 0)	1088	if (grp->int2 <= 0)
1604	grp->fd2 = 2;	1089	grp->int2 = 2;
1605		1090
1606	aio_grp_feed (grp);	1091	eio_grp_limit (grp, grp->int2);
1607	}	1092	}
1608		1093

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