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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 1.126 by root, Thu Sep 25 07:56:07 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	/* perl namespace pollution */
34	# if __linux	19	#undef VERSION
35	# include <sys/sendfile.h>	20
36	# elif __freebsd	21	#ifdef _WIN32
37	# include <sys/socket.h>	22
38	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
39	# elif __hpux	24	# undef malloc
40	# include <sys/socket.h>	25	# undef free
41	# elif __solaris /* not yet */	26
42	# 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
43	# else	59	#else
44	# error sendfile support requested but not available	60
45	# 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
46	#endif	68	#endif
47		69
48	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
49	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
50	# 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
51	#endif	83	#endif
52		84
53	#ifndef PTHREAD_STACK_MIN	85	static HV *stash;
54	/* care for broken platforms, e.g. windows */	86	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		87
103	#define AIO_REQ_KLASS "IO::AIO::REQ"	88	#define AIO_REQ_KLASS "IO::AIO::REQ"
104	#define AIO_GRP_KLASS "IO::AIO::GRP"	89	#define AIO_GRP_KLASS "IO::AIO::GRP"
105		90
106	typedef struct aio_cb	91	#define EIO_REQ_MEMBERS \
107	{
108	struct aio_cb *volatile next;
109
110	SV *data, *callback;	92	SV *callback; \
111	SV *fh, *fh2;	93	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;	94	STRLEN stroffset; \
119	int type;	95	SV *self;
120	int fd, fd2;
121	int errorno;
122	mode_t mode; /* open */
123		96
124	unsigned char flags;	97	#define EIO_NO_WRAPPERS 1
125	unsigned char pri;
126		98
127	SV *self; /* the perl counterpart of this request, if any */	99	#include "libeio/eio.h"
128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	100
129	} aio_cb;	101	static int req_invoke (eio_req *req);
		102	#define EIO_FINISH(req) req_invoke (req)
		103	static void aio_grp_feed (eio_req *grp);
		104	#define EIO_FEED(req) aio_grp_feed (req)
		105	static void req_destroy (eio_req *grp);
		106	#define EIO_DESTROY(req) req_destroy (req)
130		107
131	enum {	108	enum {
132	FLAG_CANCELLED = 0x01,	109	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
133	};	110	};
134		111
		112	#include "libeio/eio.c"
		113
135	typedef aio_cb *aio_req;	114	typedef eio_req *aio_req;
136	typedef aio_cb *aio_req_ornot;	115	typedef eio_req *aio_req_ornot;
137		116
138	enum {	117	static SV *on_next_submit;
139	PRI_MIN = -4,	118	static int next_pri = EIO_PRI_DEFAULT;
140	PRI_MAX = 4,	119	static int max_outstanding;
141		120
142	DEFAULT_PRI = 0,	121	static int respipe_osf [2], respipe [2] = { -1, -1 };
143	PRI_BIAS = -PRI_MIN,
144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
145	};
146		122
147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
148
149	static unsigned int started, wanted;
150	static volatile unsigned int nreqs, nready, npending;
151	static volatile unsigned int max_outstanding = 0xffffffff;
152	static int respipe [2];
153
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);	123	static void req_destroy (aio_req req);
264	static void req_cancel (aio_req req);	124	static void req_cancel (aio_req req);
		125
		126	static void want_poll (void)
		127	{
		128	/* write a dummy byte to the pipe so fh becomes ready */
		129	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		130	}
		131
		132	static void done_poll (void)
		133	{
		134	/* read any signals sent by the worker threads */
		135	char buf [4];
		136	while (respipe_read (respipe [0], buf, 4) == 4)
		137	;
		138	}
265		139
266	/* must be called at most once */	140	/* must be called at most once */
267	static SV *req_sv (aio_req req, const char *klass)	141	static SV *req_sv (aio_req req, const char *klass)
268	{	142	{
269	if (!req->self)	143	if (!req->self)
…		…
287	return mg ? (aio_req)mg->mg_ptr : 0;	161	return mg ? (aio_req)mg->mg_ptr : 0;
288	}	162	}
289		163
290	static void aio_grp_feed (aio_req grp)	164	static void aio_grp_feed (aio_req grp)
291	{	165	{
292	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	166	if (grp->sv2 && SvOK (grp->sv2))
293	{	167	{
294	int old_len = grp->length;
295
296	if (grp->fh2 && SvOK (grp->fh2))
297	{
298	dSP;	168	dSP;
299		169
300	ENTER;	170	ENTER;
301	SAVETMPS;	171	SAVETMPS;
302	PUSHMARK (SP);	172	PUSHMARK (SP);
303	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	173	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
304	PUTBACK;	174	PUTBACK;
305	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	175	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
306	SPAGAIN;	176	SPAGAIN;
307	FREETMPS;	177	FREETMPS;
308	LEAVE;	178	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	}	179	}
319	}	180	}
320		181
321	static void aio_grp_dec (aio_req grp)	182	static void req_submit (eio_req *req)
322	{	183	{
323	--grp->length;	184	eio_submit (req);
324		185
325	/* call feeder, if applicable */	186	if (on_next_submit)
326	aio_grp_feed (grp);
327
328	/* finish, if done */
329	if (!grp->length && grp->fd)
330	{	187	{
331	req_invoke (grp);	188	dSP;
332	req_free (grp);	189	SV *cb = sv_2mortal (on_next_submit);
		190
		191	on_next_submit = 0;
		192
		193	PUSHMARK (SP);
		194	PUTBACK;
		195	call_sv (cb, G_DISCARD | G_EVAL);
333	}	196	}
334	}	197	}
335		198
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)	199	static int req_invoke (eio_req *req)
358	{	200	{
359	dSP;	201	dSP;
360		202
		203	if (req->flags & FLAG_SV2_RO_OFF)
		204	SvREADONLY_off (req->sv2);
		205
361	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	206	if (!EIO_CANCELLED (req) && SvOK (req->callback))
362	{	207	{
363	ENTER;	208	ENTER;
364	SAVETMPS;	209	SAVETMPS;
365	PUSHMARK (SP);	210	PUSHMARK (SP);
366	EXTEND (SP, 1);	211	EXTEND (SP, 1);
367		212
368	switch (req->type)	213	switch (req->type)
369	{	214	{
370	case REQ_READDIR:	215	case EIO_READDIR:
371	{	216	{
372	SV *rv = &PL_sv_undef;	217	SV *rv = &PL_sv_undef;
373		218
374	if (req->result >= 0)	219	if (req->result >= 0)
375	{	220	{
376	int i;	221	int i;
377	char *buf = req->data2ptr;	222	char *buf = req->ptr2;
378	AV *av = newAV ();	223	AV *av = newAV ();
379		224
380	av_extend (av, req->result - 1);	225	av_extend (av, req->result - 1);
381		226
382	for (i = 0; i < req->result; ++i)	227	for (i = 0; i < req->result; ++i)
…		…
392		237
393	PUSHs (rv);	238	PUSHs (rv);
394	}	239	}
395	break;	240	break;
396		241
397	case REQ_OPEN:	242	case EIO_OPEN:
398	{	243	{
399	/* convert fd to fh */	244	/* convert fd to fh */
400	SV *fh;	245	SV *fh = &PL_sv_undef;
401		246
402	PUSHs (sv_2mortal (newSViv (req->result)));	247	if (req->result >= 0)
403	PUTBACK;	248	{
404	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	249	GV *gv = (GV *)sv_newmortal ();
405	SPAGAIN;	250	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		251	char sym [64];
		252	int symlen;
		253
		254	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		255	gv_init (gv, stash, sym, symlen, 0);
406		256
407	fh = SvREFCNT_inc (POPs);	257	symlen = snprintf (
		258	sym,
		259	sizeof (sym),
		260	"%s&=%d",
		261	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		262	req->result
		263	);
408		264
		265	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		266	fh = (SV *)gv;
		267	}
		268
409	PUSHMARK (SP);	269	PUSHs (fh);
410	XPUSHs (sv_2mortal (fh));
411	}	270	}
412	break;	271	break;
413		272
414	case REQ_GROUP:	273	case EIO_GROUP:
415	req->fd = 2; /* mark group as finished */	274	req->int1 = 2; /* mark group as finished */
416		275
417	if (req->data)	276	if (req->sv1)
418	{	277	{
419	int i;	278	int i;
420	AV *av = (AV *)req->data;	279	AV *av = (AV *)req->sv1;
421		280
422	EXTEND (SP, AvFILL (av) + 1);	281	EXTEND (SP, AvFILL (av) + 1);
423	for (i = 0; i <= AvFILL (av); ++i)	282	for (i = 0; i <= AvFILL (av); ++i)
424	PUSHs (*av_fetch (av, i, 0));	283	PUSHs (*av_fetch (av, i, 0));
425	}	284	}
426	break;	285	break;
427		286
428	case REQ_NOP:	287	case EIO_NOP:
429	case REQ_BUSY:	288	case EIO_BUSY:
430	break;	289	break;
		290
		291	case EIO_READLINK:
		292	if (req->result > 0)
		293	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		294	break;
		295
		296	case EIO_STAT:
		297	case EIO_LSTAT:
		298	case EIO_FSTAT:
		299	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		300	PL_laststatval = req->result;
		301	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		302	PUSHs (sv_2mortal (newSViv (req->result)));
		303	break;
		304
		305	case EIO_READ:
		306	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		307	*SvEND (req->sv2) = 0;
		308	PUSHs (sv_2mortal (newSViv (req->result)));
		309	break;
		310
		311	case EIO_DUP2:
		312	if (req->result > 0)
		313	req->result = 0;
		314	/* FALLTHROUGH */
431		315
432	default:	316	default:
433	PUSHs (sv_2mortal (newSViv (req->result)));	317	PUSHs (sv_2mortal (newSViv (req->result)));
434	break;	318	break;
435	}	319	}
436		320
437	errno = req->errorno;	321	errno = req->errorno;
438		322
439	PUTBACK;	323	PUTBACK;
440	call_sv (req->callback, G_VOID | G_EVAL);	324	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
441	SPAGAIN;	325	SPAGAIN;
442		326
443	FREETMPS;	327	FREETMPS;
444	LEAVE;	328	LEAVE;
		329
		330	PUTBACK;
445	}	331	}
446		332
447	if (req->grp)	333	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	}	334	}
467		335
468	static void req_free (aio_req req)	336	static void req_destroy (aio_req req)
469	{	337	{
470	if (req->self)	338	if (req->self)
471	{	339	{
472	sv_unmagic (req->self, PERL_MAGIC_ext);	340	sv_unmagic (req->self, PERL_MAGIC_ext);
473	SvREFCNT_dec (req->self);	341	SvREFCNT_dec (req->self);
474	}	342	}
475		343
476	SvREFCNT_dec (req->data);
477	SvREFCNT_dec (req->fh);	344	SvREFCNT_dec (req->sv1);
478	SvREFCNT_dec (req->fh2);	345	SvREFCNT_dec (req->sv2);
479	SvREFCNT_dec (req->callback);	346	SvREFCNT_dec (req->callback);
480	Safefree (req->statdata);
481
482	if (req->type == REQ_READDIR)
483	free (req->data2ptr);
484		347
485	Safefree (req);	348	Safefree (req);
486	}	349	}
487		350
488	static void req_cancel_subs (aio_req grp)	351	static void req_cancel_subs (aio_req grp)
489	{	352	{
490	aio_req sub;	353	aio_req sub;
491		354
492	if (grp->type != REQ_GROUP)	355	if (grp->type != EIO_GROUP)
493	return;	356	return;
494		357
495	SvREFCNT_dec (grp->fh2);	358	SvREFCNT_dec (grp->sv2);
496	grp->fh2 = 0;	359	grp->sv2 = 0;
497		360
498	for (sub = grp->grp_first; sub; sub = sub->grp_next)	361	eio_grp_cancel (grp);
499	req_cancel (sub);
500	}	362	}
501		363
502	static void req_cancel (aio_req req)	364	#ifdef USE_SOCKETS_AS_HANDLES
503	{	365	# define TO_SOCKET(x) (win32_get_osfhandle (x))
504	req->flags |= FLAG_CANCELLED;	366	#else
		367	# define TO_SOCKET(x) (x)
		368	#endif
505		369
506	req_cancel_subs (req);	370	static void
507	}	371	create_respipe (void)
		372	{
		373	int old_readfd = respipe [0];
508		374
		375	if (respipe [1] >= 0)
		376	respipe_close (TO_SOCKET (respipe [1]));
		377
		378	#ifdef _WIN32
		379	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		380	#else
		381	if (pipe (respipe))
		382	#endif
		383	croak ("unable to initialize result pipe");
		384
		385	if (old_readfd >= 0)
		386	{
		387	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		388	croak ("unable to initialize result pipe(2)");
		389
		390	respipe_close (respipe [0]);
		391	respipe [0] = old_readfd;
		392	}
		393
		394	#ifdef _WIN32
		395	int arg = 1;
		396	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		397	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		398	#else
		399	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		400	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		401	#endif
		402	croak ("unable to initialize result pipe(3)");
		403
		404	respipe_osf [0] = TO_SOCKET (respipe [0]);
		405	respipe_osf [1] = TO_SOCKET (respipe [1]);
		406	}
		407
		408	static void poll_wait (void)
		409	{
		410	fd_set rfd;
		411
		412	while (eio_nreqs ())
		413	{
		414	int size;
		415
		416	X_LOCK (reslock);
		417	size = res_queue.size;
		418	X_UNLOCK (reslock);
		419
		420	if (size)
		421	return;
		422
		423	etp_maybe_start_thread ();
		424
		425	FD_ZERO (&rfd);
		426	FD_SET (respipe [0], &rfd);
		427
		428	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		429	}
		430	}
		431
509	static int poll_cb (int max)	432	static int poll_cb (void)
510	{	433	{
511	dSP;
512	int count = 0;
513	int do_croak = 0;
514	aio_req req;
515
516	for (;;)	434	for (;;)
517	{	435	{
518	while (max <= 0 || count < max)	436	int res = eio_poll ();
519	{
520	LOCK (reslock);
521	req = reqq_shift (&res_queue);
522		437
523	if (req)	438	if (res > 0)
524	{
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;	439	croak (0);
		440
		441	if (!max_outstanding || max_outstanding > eio_nreqs ())
		442	return res;
575		443
576	poll_wait ();	444	poll_wait ();
577
578	max = 0;
579	}	445	}
580
581	return count;
582	}
583
584	static void *aio_proc(void *arg);
585
586	static void start_thread (void)
587	{
588	sigset_t fullsigset, oldsigset;
589	pthread_attr_t attr;
590
591	worker *wrk = calloc (1, sizeof (worker));
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	{
607	wrk->prev = &wrk_first;
608	wrk->next = wrk_first.next;
609	wrk_first.next->prev = wrk;
610	wrk_first.next = wrk;
611	++started;
612	}
613	else
614	free (wrk);
615
616	sigprocmask (SIG_SETMASK, &oldsigset, 0);
617	UNLOCK (wrklock);
618	}
619
620	static void req_send (aio_req req)
621	{
622	while (started < wanted && nreqs >= started)
623	start_thread ();
624
625	++nreqs;
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	{
661	end_thread ();
662	cur--;
663	}
664
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
710	return res;
711	}
712
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	}	446	}
1063		447
1064	static void atfork_child (void)	448	static void atfork_child (void)
1065	{	449	{
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 ();	450	create_respipe ();
1091
1092	atfork_parent ();
1093	}	451	}
1094		452
1095	#define dREQ \	453	#define dREQ \
1096	aio_req req; \	454	aio_req req; \
1097	int req_pri = next_pri; \	455	int req_pri = next_pri; \
1098	next_pri = DEFAULT_PRI + PRI_BIAS; \	456	next_pri = EIO_PRI_DEFAULT; \
1099	\	457	\
1100	if (SvOK (callback) && !SvROK (callback)) \	458	if (SvOK (callback) && !SvROK (callback)) \
1101	croak ("callback must be undef or of reference type"); \	459	croak ("callback must be undef or of reference type"); \
1102	\	460	\
1103	Newz (0, req, 1, aio_cb); \	461	Newz (0, req, 1, eio_req); \
1104	if (!req) \	462	if (!req) \
1105	croak ("out of memory during aio_req allocation"); \	463	croak ("out of memory during eio_req allocation"); \
1106	\	464	\
1107	req->callback = newSVsv (callback); \	465	req->callback = newSVsv (callback); \
1108	req->pri = req_pri	466	req->pri = req_pri
1109		467
1110	#define REQ_SEND \	468	#define REQ_SEND \
		469	PUTBACK; \
1111	req_send (req); \	470	req_submit (req); \
		471	SPAGAIN; \
1112	\	472	\
1113	if (GIMME_V != G_VOID) \	473	if (GIMME_V != G_VOID) \
1114	XPUSHs (req_sv (req, AIO_REQ_KLASS));	474	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1115		475
1116	MODULE = IO::AIO PACKAGE = IO::AIO	476	MODULE = IO::AIO PACKAGE = IO::AIO
1117		477
1118	PROTOTYPES: ENABLE	478	PROTOTYPES: ENABLE
1119		479
1120	BOOT:	480	BOOT:
1121	{	481	{
1122	HV *stash = gv_stashpv ("IO::AIO", 1);	482	stash = gv_stashpv ("IO::AIO", 1);
		483
1123	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	484	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
1124	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	485	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1125	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	486	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		487	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		488	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		489	#ifndef _WIN32
		490	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		491	#endif
1126		492
1127	create_pipe ();	493	create_respipe ();
1128	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	494
		495	if (eio_init (want_poll, done_poll) < 0)
		496	croak ("IO::AIO: unable to initialise eio library");
		497
		498	/* atfork child called in fifo order, so before eio's handler */
		499	X_THREAD_ATFORK (0, 0, atfork_child);
1129	}	500	}
		501
		502	void
		503	max_poll_reqs (int nreqs)
		504	PROTOTYPE: $
		505	CODE:
		506	eio_set_max_poll_reqs (nreqs);
		507
		508	void
		509	max_poll_time (double nseconds)
		510	PROTOTYPE: $
		511	CODE:
		512	eio_set_max_poll_time (nseconds);
1130		513
1131	void	514	void
1132	min_parallel (int nthreads)	515	min_parallel (int nthreads)
1133	PROTOTYPE: $	516	PROTOTYPE: $
		517	CODE:
		518	eio_set_min_parallel (nthreads);
1134		519
1135	void	520	void
1136	max_parallel (int nthreads)	521	max_parallel (int nthreads)
1137	PROTOTYPE: $	522	PROTOTYPE: $
		523	CODE:
		524	eio_set_max_parallel (nthreads);
1138		525
1139	int	526	void
		527	max_idle (int nthreads)
		528	PROTOTYPE: $
		529	CODE:
		530	eio_set_max_idle (nthreads);
		531
		532	void
1140	max_outstanding (int maxreqs)	533	max_outstanding (int maxreqs)
1141	PROTOTYPE: $	534	PROTOTYPE: $
1142	CODE:	535	CODE:
1143	RETVAL = max_outstanding;
1144	max_outstanding = maxreqs;	536	max_outstanding = maxreqs;
1145	OUTPUT:
1146	RETVAL
1147		537
1148	void	538	void
1149	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	539	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: $$$;$	540	PROTOTYPE: $$$;$
1155	PPCODE:	541	PPCODE:
1156	{	542	{
1157	dREQ;	543	dREQ;
1158		544
1159	req->type = REQ_OPEN;	545	req->type = EIO_OPEN;
1160	req->data = newSVsv (pathname);	546	req->sv1 = newSVsv (pathname);
1161	req->dataptr = SvPVbyte_nolen (req->data);	547	req->ptr1 = SvPVbyte_nolen (req->sv1);
1162	req->fd = flags;	548	req->int1 = flags;
1163	req->mode = mode;	549	req->int2 = mode;
1164		550
1165	REQ_SEND;	551	REQ_SEND;
1166	}	552	}
1167		553
1168	void	554	void
1169	aio_close (fh,callback=&PL_sv_undef)	555	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1170	SV * fh
1171	SV * callback
1172	PROTOTYPE: $;$	556	PROTOTYPE: $;$
1173	ALIAS:	557	ALIAS:
1174	aio_close = REQ_CLOSE
1175	aio_fsync = REQ_FSYNC	558	aio_fsync = EIO_FSYNC
1176	aio_fdatasync = REQ_FDATASYNC	559	aio_fdatasync = EIO_FDATASYNC
1177	PPCODE:	560	PPCODE:
1178	{	561	{
1179	dREQ;	562	dREQ;
1180		563
1181	req->type = ix;	564	req->type = ix;
1182	req->fh = newSVsv (fh);	565	req->sv1 = newSVsv (fh);
1183	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	566	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1184		567
1185	REQ_SEND (req);	568	REQ_SEND (req);
1186	}	569	}
1187		570
1188	void	571	void
		572	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		573	PROTOTYPE: $;$
		574	PPCODE:
		575	{
		576	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		577	dREQ;
		578
		579	if (close_pipe < 0)
		580	{
		581	int pipefd [2];
		582
		583	if (pipe (pipefd) < 0
		584	|| close (pipefd [1]) < 0
		585	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		586	abort (); /*D*/
		587
		588	close_pipe = pipefd [0];
		589	}
		590
		591	req->type = EIO_DUP2;
		592	req->int1 = close_pipe;
		593	req->sv2 = newSVsv (fh);
		594	req->int2 = PerlIO_fileno (IoIFP (sv_2io (fh)));
		595
		596	REQ_SEND (req);
		597	}
		598
		599	void
1189	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	600	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:	601	ALIAS:
1197	aio_read = REQ_READ	602	aio_read = EIO_READ
1198	aio_write = REQ_WRITE	603	aio_write = EIO_WRITE
1199	PROTOTYPE: $$$$$;$	604	PROTOTYPE: $$$$$;$
1200	PPCODE:	605	PPCODE:
1201	{	606	{
1202	aio_req req;
1203	STRLEN svlen;	607	STRLEN svlen;
1204	char *svptr = SvPVbyte (data, svlen);	608	char *svptr = SvPVbyte (data, svlen);
		609	UV len = SvUV (length);
1205		610
1206	SvUPGRADE (data, SVt_PV);	611	SvUPGRADE (data, SVt_PV);
1207	SvPOK_on (data);	612	SvPOK_on (data);
1208		613
1209	if (dataoffset < 0)	614	if (dataoffset < 0)
1210	dataoffset += svlen;	615	dataoffset += svlen;
1211		616
1212	if (dataoffset < 0 || dataoffset > svlen)	617	if (dataoffset < 0 || dataoffset > svlen)
1213	croak ("data offset outside of string");	618	croak ("dataoffset outside of data scalar");
1214		619
1215	if (ix == REQ_WRITE)	620	if (ix == EIO_WRITE)
1216	{	621	{
1217	/* write: check length and adjust. */	622	/* write: check length and adjust. */
1218	if (length < 0 || length + dataoffset > svlen)	623	if (!SvOK (length) || len + dataoffset > svlen)
1219	length = svlen - dataoffset;	624	len = svlen - dataoffset;
1220	}	625	}
1221	else	626	else
1222	{	627	{
1223	/* read: grow scalar as necessary */	628	/* read: grow scalar as necessary */
1224	svptr = SvGROW (data, length + dataoffset);	629	svptr = SvGROW (data, len + dataoffset + 1);
1225	}	630	}
1226		631
1227	if (length < 0)	632	if (len < 0)
1228	croak ("length must not be negative");	633	croak ("length must not be negative");
1229		634
1230	{	635	{
1231	dREQ;	636	dREQ;
1232		637
1233	req->type = ix;	638	req->type = ix;
1234	req->fh = newSVsv (fh);	639	req->sv1 = newSVsv (fh);
1235	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	640	req->int1 = PerlIO_fileno (ix == EIO_READ ? IoIFP (sv_2io (fh))
1236	: IoOFP (sv_2io (fh)));	641	: IoOFP (sv_2io (fh)));
		642	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1237	req->offset = offset;	643	req->size = len;
1238	req->length = length;
1239	req->data = SvREFCNT_inc (data);	644	req->sv2 = SvREFCNT_inc (data);
1240	req->dataptr = (char *)svptr + dataoffset;	645	req->ptr2 = (char *)svptr + dataoffset;
		646	req->stroffset = dataoffset;
1241		647
1242	if (!SvREADONLY (data))	648	if (!SvREADONLY (data))
1243	{	649	{
1244	SvREADONLY_on (data);	650	SvREADONLY_on (data);
1245	req->data2ptr = (void *)data;	651	req->flags |= FLAG_SV2_RO_OFF;
1246	}	652	}
1247		653
1248	REQ_SEND;	654	REQ_SEND;
1249	}	655	}
1250	}	656	}
1251		657
1252	void	658	void
		659	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		660	PROTOTYPE: $$;$
		661	PPCODE:
		662	{
		663	SV *data;
		664	dREQ;
		665
		666	req->type = EIO_READLINK;
		667	req->sv1 = newSVsv (path);
		668	req->ptr1 = SvPVbyte_nolen (req->sv1);
		669
		670	REQ_SEND;
		671	}
		672
		673	void
1253	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	674	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: $$$$;$	675	PROTOTYPE: $$$$;$
1260	PPCODE:	676	PPCODE:
1261	{	677	{
1262	dREQ;	678	dREQ;
1263		679
1264	req->type = REQ_SENDFILE;	680	req->type = EIO_SENDFILE;
1265	req->fh = newSVsv (out_fh);	681	req->sv1 = newSVsv (out_fh);
1266	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	682	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));
1267	req->fh2 = newSVsv (in_fh);	683	req->sv2 = newSVsv (in_fh);
1268	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	684	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));
1269	req->offset = in_offset;	685	req->offs = SvVAL64 (in_offset);
1270	req->length = length;	686	req->size = length;
1271		687
1272	REQ_SEND;	688	REQ_SEND;
1273	}	689	}
1274		690
1275	void	691	void
1276	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	692	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1277	SV * fh
1278	UV offset
1279	IV length
1280	SV * callback
1281	PROTOTYPE: $$$;$	693	PROTOTYPE: $$$;$
1282	PPCODE:	694	PPCODE:
1283	{	695	{
1284	dREQ;	696	dREQ;
1285		697
1286	req->type = REQ_READAHEAD;	698	req->type = EIO_READAHEAD;
1287	req->fh = newSVsv (fh);	699	req->sv1 = newSVsv (fh);
1288	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	700	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));
1289	req->offset = offset;	701	req->offs = SvVAL64 (offset);
1290	req->length = length;	702	req->size = length;
1291		703
1292	REQ_SEND;	704	REQ_SEND;
1293	}	705	}
1294		706
1295	void	707	void
1296	aio_stat (fh_or_path,callback=&PL_sv_undef)	708	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1297	SV * fh_or_path
1298	SV * callback
1299	ALIAS:	709	ALIAS:
1300	aio_stat = REQ_STAT	710	aio_stat = EIO_STAT
1301	aio_lstat = REQ_LSTAT	711	aio_lstat = EIO_LSTAT
1302	PPCODE:	712	PPCODE:
1303	{	713	{
1304	dREQ;	714	dREQ;
1305		715
1306	New (0, req->statdata, 1, Stat_t);	716	req->sv1 = newSVsv (fh_or_path);
1307	if (!req->statdata)
1308	{
1309	req_free (req);
1310	croak ("out of memory during aio_req->statdata allocation");
1311	}
1312		717
1313	if (SvPOK (fh_or_path))	718	if (SvPOK (req->sv1))
1314	{	719	{
1315	req->type = ix;	720	req->type = ix;
1316	req->data = newSVsv (fh_or_path);
1317	req->dataptr = SvPVbyte_nolen (req->data);	721	req->ptr1 = SvPVbyte_nolen (req->sv1);
1318	}	722	}
1319	else	723	else
1320	{	724	{
1321	req->type = REQ_FSTAT;	725	req->type = EIO_FSTAT;
1322	req->fh = newSVsv (fh_or_path);
1323	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	726	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1324	}	727	}
1325		728
1326	REQ_SEND;	729	REQ_SEND;
1327	}	730	}
1328		731
1329	void	732	void
		733	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		734	PPCODE:
		735	{
		736	dREQ;
		737
		738	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		739	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		740	req->sv1 = newSVsv (fh_or_path);
		741
		742	if (SvPOK (req->sv1))
		743	{
		744	req->type = EIO_UTIME;
		745	req->ptr1 = SvPVbyte_nolen (req->sv1);
		746	}
		747	else
		748	{
		749	req->type = EIO_FUTIME;
		750	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		751	}
		752
		753	REQ_SEND;
		754	}
		755
		756	void
		757	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		758	PPCODE:
		759	{
		760	dREQ;
		761
		762	req->sv1 = newSVsv (fh_or_path);
		763	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		764
		765	if (SvPOK (req->sv1))
		766	{
		767	req->type = EIO_TRUNCATE;
		768	req->ptr1 = SvPVbyte_nolen (req->sv1);
		769	}
		770	else
		771	{
		772	req->type = EIO_FTRUNCATE;
		773	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		774	}
		775
		776	REQ_SEND;
		777	}
		778
		779	void
		780	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		781	ALIAS:
		782	aio_chmod = EIO_CHMOD
		783	aio_mkdir = EIO_MKDIR
		784	PPCODE:
		785	{
		786	dREQ;
		787
		788	req->int2 = mode;
		789	req->sv1 = newSVsv (fh_or_path);
		790
		791	if (SvPOK (req->sv1))
		792	{
		793	req->type = ix;
		794	req->ptr1 = SvPVbyte_nolen (req->sv1);
		795	}
		796	else
		797	{
		798	req->type = EIO_FCHMOD;
		799	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		800	}
		801
		802	REQ_SEND;
		803	}
		804
		805	void
		806	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		807	PPCODE:
		808	{
		809	dREQ;
		810
		811	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		812	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		813	req->sv1 = newSVsv (fh_or_path);
		814
		815	if (SvPOK (req->sv1))
		816	{
		817	req->type = EIO_CHOWN;
		818	req->ptr1 = SvPVbyte_nolen (req->sv1);
		819	}
		820	else
		821	{
		822	req->type = EIO_FCHOWN;
		823	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		824	}
		825
		826	REQ_SEND;
		827	}
		828
		829	void
1330	aio_unlink (pathname,callback=&PL_sv_undef)	830	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1331	SV * pathname
1332	SV * callback
1333	ALIAS:	831	ALIAS:
1334	aio_unlink = REQ_UNLINK	832	aio_unlink = EIO_UNLINK
1335	aio_rmdir = REQ_RMDIR	833	aio_rmdir = EIO_RMDIR
1336	aio_readdir = REQ_READDIR	834	aio_readdir = EIO_READDIR
1337	PPCODE:	835	PPCODE:
1338	{	836	{
1339	dREQ;	837	dREQ;
1340		838
1341	req->type = ix;	839	req->type = ix;
1342	req->data = newSVsv (pathname);	840	req->sv1 = newSVsv (pathname);
1343	req->dataptr = SvPVbyte_nolen (req->data);	841	req->ptr1 = SvPVbyte_nolen (req->sv1);
		842
		843	REQ_SEND;
		844	}
		845
		846	void
		847	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		848	ALIAS:
		849	aio_link = EIO_LINK
		850	aio_symlink = EIO_SYMLINK
		851	aio_rename = EIO_RENAME
		852	PPCODE:
		853	{
		854	dREQ;
		855
		856	req->type = ix;
		857	req->sv1 = newSVsv (oldpath);
		858	req->ptr1 = SvPVbyte_nolen (req->sv1);
		859	req->sv2 = newSVsv (newpath);
		860	req->ptr2 = SvPVbyte_nolen (req->sv2);
1344		861
1345	REQ_SEND;	862	REQ_SEND;
1346	}	863	}
1347		864
1348	void	865	void
1349	aio_link (oldpath,newpath,callback=&PL_sv_undef)	866	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:	867	PPCODE:
1358	{	868	{
1359	dREQ;	869	dREQ;
1360		870
1361	req->type = ix;	871	req->type = EIO_MKNOD;
1362	req->fh = newSVsv (oldpath);	872	req->sv1 = newSVsv (pathname);
1363	req->data2ptr = SvPVbyte_nolen (req->fh);	873	req->ptr1 = SvPVbyte_nolen (req->sv1);
1364	req->data = newSVsv (newpath);	874	req->int2 = (mode_t)mode;
1365	req->dataptr = SvPVbyte_nolen (req->data);	875	req->offs = dev;
1366		876
1367	REQ_SEND;	877	REQ_SEND;
1368	}	878	}
1369		879
1370	void	880	void
1371	aio_busy (delay,callback=&PL_sv_undef)	881	aio_busy (double delay, SV *callback=&PL_sv_undef)
1372	double delay
1373	SV * callback
1374	PPCODE:	882	PPCODE:
1375	{	883	{
1376	dREQ;	884	dREQ;
1377		885
1378	req->type = REQ_BUSY;	886	req->type = EIO_BUSY;
1379	req->fd = delay < 0. ? 0 : delay;	887	req->nv1 = delay < 0. ? 0. : delay;
1380	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1381		888
1382	REQ_SEND;	889	REQ_SEND;
1383	}	890	}
1384		891
1385	void	892	void
1386	aio_group (callback=&PL_sv_undef)	893	aio_group (SV *callback=&PL_sv_undef)
1387	SV * callback
1388	PROTOTYPE: ;$	894	PROTOTYPE: ;$
1389	PPCODE:	895	PPCODE:
1390	{	896	{
1391	dREQ;	897	dREQ;
1392		898
1393	req->type = REQ_GROUP;	899	req->type = EIO_GROUP;
		900
1394	req_send (req);	901	eio_submit (req);
1395
1396	XPUSHs (req_sv (req, AIO_GRP_KLASS));	902	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1397	}	903	}
1398		904
1399	void	905	void
1400	aio_nop (callback=&PL_sv_undef)	906	aio_nop (SV *callback=&PL_sv_undef)
1401	SV * callback	907	ALIAS:
		908	aio_nop = EIO_NOP
		909	aio_sync = EIO_SYNC
1402	PPCODE:	910	PPCODE:
1403	{	911	{
1404	dREQ;	912	dREQ;
1405		913
1406	req->type = REQ_NOP;	914	req->type = ix;
1407		915
1408	REQ_SEND;	916	REQ_SEND;
1409	}	917	}
1410		918
1411	int	919	int
1412	aioreq_pri (int pri = 0)	920	aioreq_pri (int pri = 0)
1413	PROTOTYPE: ;$	921	PROTOTYPE: ;$
1414	CODE:	922	CODE:
1415	RETVAL = next_pri - PRI_BIAS;	923	RETVAL = next_pri;
1416	if (items > 0)	924	if (items > 0)
1417	{	925	{
1418	if (pri < PRI_MIN) pri = PRI_MIN;	926	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1419	if (pri > PRI_MAX) pri = PRI_MAX;	927	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1420	next_pri = pri + PRI_BIAS;	928	next_pri = pri;
1421	}	929	}
1422	OUTPUT:	930	OUTPUT:
1423	RETVAL	931	RETVAL
1424		932
1425	void	933	void
1426	aioreq_nice (int nice = 0)	934	aioreq_nice (int nice = 0)
1427	CODE:	935	CODE:
1428	nice = next_pri - nice;	936	nice = next_pri - nice;
1429	if (nice < PRI_MIN) nice = PRI_MIN;	937	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1430	if (nice > PRI_MAX) nice = PRI_MAX;	938	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1431	next_pri = nice + PRI_BIAS;	939	next_pri = nice;
1432		940
1433	void	941	void
1434	flush ()	942	flush ()
1435	PROTOTYPE:	943	PROTOTYPE:
1436	CODE:	944	CODE:
1437	while (nreqs)	945	while (eio_nreqs ())
1438	{	946	{
1439	poll_wait ();	947	poll_wait ();
1440	poll_cb (0);	948	poll_cb ();
1441	}	949	}
1442		950
1443	void	951	int
1444	poll()	952	poll()
1445	PROTOTYPE:	953	PROTOTYPE:
1446	CODE:	954	CODE:
1447	if (nreqs)
1448	{
1449	poll_wait ();	955	poll_wait ();
1450	poll_cb (0);	956	RETVAL = poll_cb ();
1451	}	957	OUTPUT:
		958	RETVAL
1452		959
1453	int	960	int
1454	poll_fileno()	961	poll_fileno()
1455	PROTOTYPE:	962	PROTOTYPE:
1456	CODE:	963	CODE:
…		…
1460		967
1461	int	968	int
1462	poll_cb(...)	969	poll_cb(...)
1463	PROTOTYPE:	970	PROTOTYPE:
1464	CODE:	971	CODE:
1465	RETVAL = poll_cb (0);	972	RETVAL = poll_cb ();
1466	OUTPUT:	973	OUTPUT:
1467	RETVAL	974	RETVAL
1468		975
1469	int
1470	poll_some(int max = 0)
1471	PROTOTYPE: $
1472	CODE:
1473	RETVAL = poll_cb (max);
1474	OUTPUT:
1475	RETVAL
1476
1477	void	976	void
1478	poll_wait()	977	poll_wait()
1479	PROTOTYPE:	978	PROTOTYPE:
1480	CODE:	979	CODE:
1481	if (nreqs)
1482	poll_wait ();	980	poll_wait ();
1483		981
1484	int	982	int
1485	nreqs()	983	nreqs()
1486	PROTOTYPE:	984	PROTOTYPE:
1487	CODE:	985	CODE:
1488	RETVAL = nreqs;	986	RETVAL = eio_nreqs ();
1489	OUTPUT:	987	OUTPUT:
1490	RETVAL	988	RETVAL
1491		989
1492	int	990	int
1493	nready()	991	nready()
1494	PROTOTYPE:	992	PROTOTYPE:
1495	CODE:	993	CODE:
1496	if (WORDREAD_UNSAFE) LOCK (reqlock);
1497	RETVAL = nready;	994	RETVAL = eio_nready ();
1498	if (WORDREAD_UNSAFE) UNLOCK (reqlock);
1499	OUTPUT:	995	OUTPUT:
1500	RETVAL	996	RETVAL
1501		997
1502	int	998	int
1503	npending()	999	npending()
1504	PROTOTYPE:	1000	PROTOTYPE:
1505	CODE:	1001	CODE:
1506	if (WORDREAD_UNSAFE) LOCK (reslock);
1507	RETVAL = npending;	1002	RETVAL = eio_npending ();
1508	if (WORDREAD_UNSAFE) UNLOCK (reslock);
1509	OUTPUT:	1003	OUTPUT:
1510	RETVAL	1004	RETVAL
1511		1005
		1006	int
		1007	nthreads()
		1008	PROTOTYPE:
		1009	CODE:
		1010	RETVAL = eio_nthreads ();
		1011	OUTPUT:
		1012	RETVAL
		1013
		1014	void _on_next_submit (SV *cb)
		1015	CODE:
		1016	SvREFCNT_dec (on_next_submit);
		1017	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1018
1512	PROTOTYPES: DISABLE	1019	PROTOTYPES: DISABLE
1513		1020
1514	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1021	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1515		1022
1516	void	1023	void
1517	cancel (aio_req_ornot req)	1024	cancel (aio_req_ornot req)
1518	CODE:	1025	CODE:
1519	req_cancel (req);	1026	eio_cancel (req);
1520		1027
1521	void	1028	void
1522	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1029	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1523	CODE:	1030	CODE:
1524	SvREFCNT_dec (req->callback);	1031	SvREFCNT_dec (req->callback);
…		…
1529	void	1036	void
1530	add (aio_req grp, ...)	1037	add (aio_req grp, ...)
1531	PPCODE:	1038	PPCODE:
1532	{	1039	{
1533	int i;	1040	int i;
1534	aio_req req;
1535		1041
1536	if (grp->fd == 2)	1042	if (grp->int1 == 2)
1537	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1043	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1538		1044
1539	for (i = 1; i < items; ++i )	1045	for (i = 1; i < items; ++i )
1540	{	1046	{
		1047	aio_req req;
		1048
1541	if (GIMME_V != G_VOID)	1049	if (GIMME_V != G_VOID)
1542	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1050	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1543		1051
1544	req = SvAIO_REQ (ST (i));	1052	req = SvAIO_REQ (ST (i));
1545		1053
1546	if (req)	1054	if (req)
1547	{	1055	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	}	1056	}
1560	}	1057	}
1561		1058
1562	void	1059	void
1563	cancel_subs (aio_req_ornot req)	1060	cancel_subs (aio_req_ornot req)
…		…
1576	av = newAV ();	1073	av = newAV ();
1577		1074
1578	for (i = 1; i < items; ++i )	1075	for (i = 1; i < items; ++i )
1579	av_push (av, newSVsv (ST (i)));	1076	av_push (av, newSVsv (ST (i)));
1580		1077
1581	SvREFCNT_dec (grp->data);	1078	SvREFCNT_dec (grp->sv1);
1582	grp->data = (SV *)av;	1079	grp->sv1 = (SV *)av;
1583	}	1080	}
1584		1081
1585	void	1082	void
1586	errno (aio_req grp, int errorno = errno)	1083	errno (aio_req grp, int errorno = errno)
1587	CODE:	1084	CODE:
1588	grp->errorno = errorno;	1085	grp->errorno = errorno;
1589		1086
1590	void	1087	void
1591	limit (aio_req grp, int limit)	1088	limit (aio_req grp, int limit)
1592	CODE:	1089	CODE:
1593	grp->fd2 = limit;	1090	eio_grp_limit (grp, limit);
1594	aio_grp_feed (grp);
1595		1091
1596	void	1092	void
1597	feed (aio_req grp, SV *callback=&PL_sv_undef)	1093	feed (aio_req grp, SV *callback=&PL_sv_undef)
1598	CODE:	1094	CODE:
1599	{	1095	{
1600	SvREFCNT_dec (grp->fh2);	1096	SvREFCNT_dec (grp->sv2);
1601	grp->fh2 = newSVsv (callback);	1097	grp->sv2 = newSVsv (callback);
1602		1098
1603	if (grp->fd2 <= 0)	1099	if (grp->int2 <= 0)
1604	grp->fd2 = 2;	1100	grp->int2 = 2;
1605		1101
1606	aio_grp_feed (grp);	1102	eio_grp_limit (grp, grp->int2);
1607	}	1103	}
1608		1104

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