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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.74 by root, Wed Oct 25 17:57:30 2006 UTC vs.
Revision 1.140 by root, Wed Jun 3 12:24:49 2009 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux
5	# define _GNU_SOURCE
6	#endif
7
8	#define _REENTRANT 1
9		2
10	#include <errno.h>	3	#include <errno.h>
11		4
12	#include "EXTERN.h"	5	#include "EXTERN.h"
13	#include "perl.h"	6	#include "perl.h"
14	#include "XSUB.h"	7	#include "XSUB.h"
15		8
16	#include "autoconf/config.h"
17
18	#include <pthread.h>
19
20	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
21	#include <errno.h>	11	#include <errno.h>
22	#include <sys/time.h>
23	#include <sys/select.h>
24	#include <sys/types.h>	12	#include <sys/types.h>
25	#include <sys/stat.h>	13	#include <sys/stat.h>
26	#include <limits.h>	14	#include <limits.h>
27	#include <unistd.h>
28	#include <fcntl.h>	15	#include <fcntl.h>
29	#include <signal.h>
30	#include <sched.h>	16	#include <sched.h>
31		17
32	#if HAVE_SENDFILE	18	/* perl namespace pollution */
33	# if __linux	19	#undef VERSION
34	# include <sys/sendfile.h>	20
35	# elif __freebsd	21	#ifdef _WIN32
36	# include <sys/socket.h>	22
37	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
38	# elif __hpux	24	# undef malloc
39	# include <sys/socket.h>	25	# undef free
40	# elif __solaris /* not yet */	26
41	# 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
42	# else	59	#else
43	# error sendfile support requested but not available	60
44	# 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
45	#endif	68	#endif
46		69
47	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
48	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
49	# 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
50	#endif	83	#endif
51		84
52	#if __ia64	85	/*****************************************************************************/
53	# define STACKSIZE 65536	86
54	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */	87	#if __GNUC__ >= 3
55	# define STACKSIZE PTHREAD_STACK_MIN	88	# define expect(expr,value) __builtin_expect ((expr),(value))
56	#else	89	#else
57	# define STACKSIZE 16384	90	# define expect(expr,value) (expr)
58	#endif	91	#endif
59		92
60	/* buffer size for various temporary buffers */	93	#define expect_false(expr) expect ((expr) != 0, 0)
61	#define AIO_BUFSIZE 65536	94	#define expect_true(expr) expect ((expr) != 0, 1)
62		95
63	#define dBUF \	96	/*****************************************************************************/
64	char *aio_buf; \
65	LOCK (wrklock); \
66	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \
67	UNLOCK (wrklock); \
68	if (!aio_buf) \
69	return -1;
70		97
71	enum {	98	static HV *stash;
72	REQ_QUIT,	99	typedef SV SV8; /* byte-sv, used for argument-checking */
73	REQ_OPEN, REQ_CLOSE,
74	REQ_READ, REQ_WRITE, REQ_READAHEAD,
75	REQ_SENDFILE,
76	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
77	REQ_FSYNC, REQ_FDATASYNC,
78	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
79	REQ_READDIR,
80	REQ_LINK, REQ_SYMLINK,
81	REQ_GROUP, REQ_NOP,
82	REQ_BUSY,
83	};
84		100
85	#define AIO_REQ_KLASS "IO::AIO::REQ"	101	#define AIO_REQ_KLASS "IO::AIO::REQ"
86	#define AIO_GRP_KLASS "IO::AIO::GRP"	102	#define AIO_GRP_KLASS "IO::AIO::GRP"
87		103
88	typedef struct aio_cb	104	#define EIO_REQ_MEMBERS \
89	{
90	struct aio_cb *volatile next;
91
92	SV *data, *callback;	105	SV *callback; \
93	SV *fh, *fh2;	106	SV *sv1, *sv2; \
94	void *dataptr, *data2ptr;
95	Stat_t *statdata;
96	off_t offset;
97	size_t length;
98	ssize_t result;
99
100	STRLEN dataoffset;	107	STRLEN stroffset; \
101	int type;	108	SV *self;
102	int fd, fd2;
103	int errorno;
104	mode_t mode; /* open */
105		109
106	unsigned char flags;	110	#define EIO_NO_WRAPPERS 1
107	unsigned char pri;
108		111
109	SV *self; /* the perl counterpart of this request, if any */	112	#include "libeio/eio.h"
110	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;	113
111	} aio_cb;	114	static int req_invoke (eio_req *req);
		115	#define EIO_FINISH(req) req_invoke (req)
		116	static void req_destroy (eio_req *grp);
		117	#define EIO_DESTROY(req) req_destroy (req)
112		118
113	enum {	119	enum {
114	FLAG_CANCELLED = 0x01,	120	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
115	};	121	};
116		122
		123	#include "libeio/eio.c"
		124
117	typedef aio_cb *aio_req;	125	typedef eio_req *aio_req;
118	typedef aio_cb *aio_req_ornot;	126	typedef eio_req *aio_req_ornot;
119		127
120	enum {	128	static SV *on_next_submit;
121	PRI_MIN = -4,	129	static int next_pri = EIO_PRI_DEFAULT;
122	PRI_MAX = 4,	130	static int max_outstanding;
123		131
124	DEFAULT_PRI = 0,	132	static int respipe_osf [2], respipe [2] = { -1, -1 };
125	PRI_BIAS = -PRI_MIN,
126	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
127	};
128		133
129	static int next_pri = DEFAULT_PRI + PRI_BIAS;
130
131	static int started, wanted;
132	static volatile int nreqs;
133	static int respipe [2];
134
135	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
136	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
137	#else
138	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
139	#endif
140
141	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
142	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
143
144	/* worker threasd management */
145	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
146
147	typedef struct worker {
148	/* locked by wrklock */
149	struct worker *prev, *next;
150
151	pthread_t tid;
152
153	/* locked by reslock, reqlock or wrklock */
154	aio_req req; /* currently processed request */
155	void *dbuf;
156	DIR *dirp;
157	} worker;
158
159	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
160
161	static void worker_clear (worker *wrk)
162	{
163	if (wrk->dirp)
164	{
165	closedir (wrk->dirp);
166	wrk->dirp = 0;
167	}
168
169	if (wrk->dbuf)
170	{
171	free (wrk->dbuf);
172	wrk->dbuf = 0;
173	}
174	}
175
176	static void worker_free (worker *wrk)
177	{
178	wrk->next->prev = wrk->prev;
179	wrk->prev->next = wrk->next;
180
181	free (wrk);
182	}
183
184	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
185	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
186	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
187
188	/*
189	* a somewhat faster data structure might be nice, but
190	* with 8 priorities this actually needs <20 insns
191	* per shift, the most expensive operation.
192	*/
193	typedef struct {
194	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
195	int size;
196	} reqq;
197
198	static reqq req_queue;
199	static reqq res_queue;
200
201	int reqq_push (reqq *q, aio_req req)
202	{
203	int pri = req->pri;
204	req->next = 0;
205
206	if (q->qe[pri])
207	{
208	q->qe[pri]->next = req;
209	q->qe[pri] = req;
210	}
211	else
212	q->qe[pri] = q->qs[pri] = req;
213
214	return q->size++;
215	}
216
217	aio_req reqq_shift (reqq *q)
218	{
219	int pri;
220
221	if (!q->size)
222	return 0;
223
224	--q->size;
225
226	for (pri = NUM_PRI; pri--; )
227	{
228	aio_req req = q->qs[pri];
229
230	if (req)
231	{
232	if (!(q->qs[pri] = req->next))
233	q->qe[pri] = 0;
234
235	return req;
236	}
237	}
238
239	abort ();
240	}
241
242	static int poll_cb ();
243	static void req_invoke (aio_req req);
244	static void req_free (aio_req req);	134	static void req_destroy (aio_req req);
245	static void req_cancel (aio_req req);	135	static void req_cancel (aio_req req);
		136
		137	static void want_poll (void)
		138	{
		139	/* write a dummy byte to the pipe so fh becomes ready */
		140	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		141	}
		142
		143	static void done_poll (void)
		144	{
		145	/* read any signals sent by the worker threads */
		146	char buf [4];
		147	while (respipe_read (respipe [0], buf, 4) == 4)
		148	;
		149	}
246		150
247	/* must be called at most once */	151	/* must be called at most once */
248	static SV *req_sv (aio_req req, const char *klass)	152	static SV *req_sv (aio_req req, const char *klass)
249	{	153	{
250	if (!req->self)	154	if (!req->self)
…		…
268	return mg ? (aio_req)mg->mg_ptr : 0;	172	return mg ? (aio_req)mg->mg_ptr : 0;
269	}	173	}
270		174
271	static void aio_grp_feed (aio_req grp)	175	static void aio_grp_feed (aio_req grp)
272	{	176	{
273	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	177	if (grp->sv2 && SvOK (grp->sv2))
274	{	178	{
275	int old_len = grp->length;
276
277	if (grp->fh2 && SvOK (grp->fh2))
278	{
279	dSP;	179	dSP;
280		180
281	ENTER;	181	ENTER;
282	SAVETMPS;	182	SAVETMPS;
283	PUSHMARK (SP);	183	PUSHMARK (SP);
284	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	184	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
285	PUTBACK;	185	PUTBACK;
286	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	186	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
287	SPAGAIN;	187	SPAGAIN;
288	FREETMPS;	188	FREETMPS;
289	LEAVE;	189	LEAVE;
290	}
291
292	/* stop if no progress has been made */
293	if (old_len == grp->length)
294	{
295	SvREFCNT_dec (grp->fh2);
296	grp->fh2 = 0;
297	break;
298	}
299	}	190	}
300	}	191	}
301		192
302	static void aio_grp_dec (aio_req grp)	193	static void req_submit (eio_req *req)
303	{	194	{
304	--grp->length;	195	eio_submit (req);
305		196
306	/* call feeder, if applicable */	197	if (expect_false (on_next_submit))
307	aio_grp_feed (grp);
308
309	/* finish, if done */
310	if (!grp->length && grp->fd)
311	{	198	{
312	req_invoke (grp);	199	dSP;
313	req_free (grp);	200	SV *cb = sv_2mortal (on_next_submit);
		201
		202	on_next_submit = 0;
		203
		204	PUSHMARK (SP);
		205	PUTBACK;
		206	call_sv (cb, G_DISCARD | G_EVAL);
314	}	207	}
315	}	208	}
316		209
317	static void poll_wait ()	210	static int req_invoke (eio_req *req)
318	{	211	{
319	fd_set rfd;	212	dSP;
320		213
321	while (nreqs)	214	if (req->flags & FLAG_SV2_RO_OFF)
		215	SvREADONLY_off (req->sv2);
		216
		217	if (!EIO_CANCELLED (req) && req->callback)
322	{	218	{
323	int size;
324	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
325	LOCK (reslock);
326	#endif
327	size = res_queue.size;
328	#if !(__i386 || __x86_64) /* safe without sempahore on these archs */
329	UNLOCK (reslock);
330	#endif
331
332	if (size)
333	return;
334
335	FD_ZERO(&rfd);
336	FD_SET(respipe [0], &rfd);
337
338	select (respipe [0] + 1, &rfd, 0, 0, 0);
339	}
340	}
341
342	static void req_invoke (aio_req req)
343	{
344	dSP;
345
346	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))
347	{
348	errno = req->errorno;
349
350	ENTER;	219	ENTER;
351	SAVETMPS;	220	SAVETMPS;
352	PUSHMARK (SP);	221	PUSHMARK (SP);
353	EXTEND (SP, 1);	222	EXTEND (SP, 1);
354		223
355	switch (req->type)	224	switch (req->type)
356	{	225	{
357	case REQ_READDIR:	226	case EIO_READDIR:
358	{	227	{
359	SV *rv = &PL_sv_undef;	228	SV *rv = &PL_sv_undef;
360		229
361	if (req->result >= 0)	230	if (req->result >= 0)
362	{	231	{
363	int i;	232	int i;
364	char *buf = req->data2ptr;	233	char *buf = req->ptr2;
365	AV *av = newAV ();	234	AV *av = newAV ();
366		235
367	av_extend (av, req->result - 1);	236	av_extend (av, req->result - 1);
368		237
369	for (i = 0; i < req->result; ++i)	238	for (i = 0; i < req->result; ++i)
…		…
379		248
380	PUSHs (rv);	249	PUSHs (rv);
381	}	250	}
382	break;	251	break;
383		252
384	case REQ_OPEN:	253	case EIO_OPEN:
385	{	254	{
386	/* convert fd to fh */	255	/* convert fd to fh */
387	SV *fh;	256	SV *fh = &PL_sv_undef;
388		257
389	PUSHs (sv_2mortal (newSViv (req->result)));	258	if (req->result >= 0)
390	PUTBACK;	259	{
391	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	260	GV *gv = (GV *)sv_newmortal ();
392	SPAGAIN;	261	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		262	char sym [64];
		263	int symlen;
		264
		265	symlen = snprintf (sym, sizeof (sym), "fd#%d", req->result);
		266	gv_init (gv, stash, sym, symlen, 0);
393		267
394	fh = SvREFCNT_inc (POPs);	268	symlen = snprintf (
		269	sym,
		270	sizeof (sym),
		271	"%s&=%d",
		272	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		273	req->result
		274	);
395		275
		276	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		277	fh = (SV *)gv;
		278	}
		279
396	PUSHMARK (SP);	280	PUSHs (fh);
397	XPUSHs (sv_2mortal (fh));
398	}	281	}
399	break;	282	break;
400		283
401	case REQ_GROUP:	284	case EIO_GROUP:
402	req->fd = 2; /* mark group as finished */	285	req->int1 = 2; /* mark group as finished */
403		286
404	if (req->data)	287	if (req->sv1)
405	{	288	{
406	int i;	289	int i;
407	AV *av = (AV *)req->data;	290	AV *av = (AV *)req->sv1;
408		291
409	EXTEND (SP, AvFILL (av) + 1);	292	EXTEND (SP, AvFILL (av) + 1);
410	for (i = 0; i <= AvFILL (av); ++i)	293	for (i = 0; i <= AvFILL (av); ++i)
411	PUSHs (*av_fetch (av, i, 0));	294	PUSHs (*av_fetch (av, i, 0));
412	}	295	}
413	break;	296	break;
414		297
415	case REQ_NOP:	298	case EIO_NOP:
416	case REQ_BUSY:	299	case EIO_BUSY:
417	break;	300	break;
		301
		302	case EIO_READLINK:
		303	if (req->result > 0)
		304	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		305	break;
		306
		307	case EIO_STAT:
		308	case EIO_LSTAT:
		309	case EIO_FSTAT:
		310	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		311	PL_laststatval = req->result;
		312	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		313	PUSHs (sv_2mortal (newSViv (req->result)));
		314	break;
		315
		316	case EIO_READ:
		317	{
		318	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		319	*SvEND (req->sv2) = 0;
		320	SvPOK_only (req->sv2);
		321	SvSETMAGIC (req->sv2);
		322	PUSHs (sv_2mortal (newSViv (req->result)));
		323	}
		324	break;
		325
		326	case EIO_DUP2:
		327	if (req->result > 0)
		328	req->result = 0;
		329	/* FALLTHROUGH */
418		330
419	default:	331	default:
420	PUSHs (sv_2mortal (newSViv (req->result)));	332	PUSHs (sv_2mortal (newSViv (req->result)));
421	break;	333	break;
422	}	334	}
423		335
		336	errno = req->errorno;
424		337
425	PUTBACK;	338	PUTBACK;
426	call_sv (req->callback, G_VOID | G_EVAL);	339	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
427	SPAGAIN;	340	SPAGAIN;
428		341
429	FREETMPS;	342	FREETMPS;
430	LEAVE;	343	LEAVE;
		344
		345	PUTBACK;
431	}	346	}
432		347
433	if (req->grp)	348	return !!SvTRUE (ERRSV);
434	{
435	aio_req grp = req->grp;
436
437	/* unlink request */
438	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
439	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
440
441	if (grp->grp_first == req)
442	grp->grp_first = req->grp_next;
443
444	aio_grp_dec (grp);
445	}
446
447	if (SvTRUE (ERRSV))
448	{
449	req_free (req);
450	croak (0);
451	}
452	}	349	}
453		350
454	static void req_free (aio_req req)	351	static void req_destroy (aio_req req)
455	{	352	{
456	if (req->self)	353	if (req->self)
457	{	354	{
458	sv_unmagic (req->self, PERL_MAGIC_ext);	355	sv_unmagic (req->self, PERL_MAGIC_ext);
459	SvREFCNT_dec (req->self);	356	SvREFCNT_dec (req->self);
460	}	357	}
461		358
462	SvREFCNT_dec (req->data);
463	SvREFCNT_dec (req->fh);	359	SvREFCNT_dec (req->sv1);
464	SvREFCNT_dec (req->fh2);	360	SvREFCNT_dec (req->sv2);
465	SvREFCNT_dec (req->callback);	361	SvREFCNT_dec (req->callback);
466	Safefree (req->statdata);
467
468	if (req->type == REQ_READDIR)
469	free (req->data2ptr);
470		362
471	Safefree (req);	363	Safefree (req);
472	}	364	}
473		365
474	static void req_cancel_subs (aio_req grp)	366	static void req_cancel_subs (aio_req grp)
475	{	367	{
476	aio_req sub;	368	aio_req sub;
477		369
478	if (grp->type != REQ_GROUP)	370	if (grp->type != EIO_GROUP)
479	return;	371	return;
480		372
481	SvREFCNT_dec (grp->fh2);	373	SvREFCNT_dec (grp->sv2);
482	grp->fh2 = 0;	374	grp->sv2 = 0;
483		375
484	for (sub = grp->grp_first; sub; sub = sub->grp_next)	376	eio_grp_cancel (grp);
485	req_cancel (sub);
486	}	377	}
487		378
488	static void req_cancel (aio_req req)	379	#ifdef USE_SOCKETS_AS_HANDLES
489	{	380	# define TO_SOCKET(x) (win32_get_osfhandle (x))
490	req->flags |= FLAG_CANCELLED;	381	#else
		382	# define TO_SOCKET(x) (x)
		383	#endif
491		384
492	req_cancel_subs (req);	385	static void
493	}	386	create_respipe (void)
		387	{
		388	int old_readfd = respipe [0];
494		389
		390	if (respipe [1] >= 0)
		391	respipe_close (TO_SOCKET (respipe [1]));
		392
		393	#ifdef _WIN32
		394	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		395	#else
		396	if (pipe (respipe))
		397	#endif
		398	croak ("unable to initialize result pipe");
		399
		400	if (old_readfd >= 0)
		401	{
		402	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
		403	croak ("unable to initialize result pipe(2)");
		404
		405	respipe_close (respipe [0]);
		406	respipe [0] = old_readfd;
		407	}
		408
		409	#ifdef _WIN32
		410	int arg = 1;
		411	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
		412	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
		413	#else
		414	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
		415	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		416	#endif
		417	croak ("unable to initialize result pipe(3)");
		418
		419	respipe_osf [0] = TO_SOCKET (respipe [0]);
		420	respipe_osf [1] = TO_SOCKET (respipe [1]);
		421	}
		422
		423	static void poll_wait (void)
		424	{
		425	fd_set rfd;
		426
		427	while (eio_nreqs ())
		428	{
		429	int size;
		430
		431	X_LOCK (reslock);
		432	size = res_queue.size;
		433	X_UNLOCK (reslock);
		434
		435	if (size)
		436	return;
		437
		438	etp_maybe_start_thread ();
		439
		440	FD_ZERO (&rfd);
		441	FD_SET (respipe [0], &rfd);
		442
		443	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		444	}
		445	}
		446
495	static int poll_cb ()	447	static int poll_cb (void)
496	{	448	{
497	dSP;
498	int count = 0;
499	int do_croak = 0;
500	aio_req req;
501
502	for (;;)	449	for (;;)
503	{	450	{
504	LOCK (reslock);	451	int res = eio_poll ();
505	req = reqq_shift (&res_queue);
506		452
507	if (req)	453	if (res > 0)
508	{
509	if (!res_queue.size)
510	{
511	/* read any signals sent by the worker threads */
512	char buf [32];
513	while (read (respipe [0], buf, 32) == 32)
514	;
515	}
516	}
517
518	UNLOCK (reslock);
519
520	if (!req)
521	break;	454	croak (0);
522		455
523	--nreqs;	456	if (!max_outstanding || max_outstanding > eio_nreqs ())
		457	return res;
524		458
525	if (req->type == REQ_QUIT)	459	poll_wait ();
526	started--;
527	else if (req->type == REQ_GROUP && req->length)
528	{
529	req->fd = 1; /* mark request as delayed */
530	continue;
531	}
532	else
533	{
534	if (req->type == REQ_READ)
535	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
536
537	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
538	SvREADONLY_off (req->data);
539
540	if (req->statdata)
541	{
542	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
543	PL_laststatval = req->result;
544	PL_statcache = *(req->statdata);
545	}
546
547	req_invoke (req);
548
549	count++;
550	}
551
552	req_free (req);
553	}	460	}
554
555	return count;
556	}	461	}
557		462
558	static void *aio_proc(void *arg);
559
560	static void start_thread (void)	463	static void atfork_child (void)
561	{	464	{
562	sigset_t fullsigset, oldsigset;	465	create_respipe ();
563	pthread_attr_t attr;
564
565	worker *wrk = calloc (1, sizeof (worker));
566
567	if (!wrk)
568	croak ("unable to allocate worker thread data");
569
570	pthread_attr_init (&attr);
571	pthread_attr_setstacksize (&attr, STACKSIZE);
572	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
573
574	sigfillset (&fullsigset);
575
576	LOCK (wrklock);
577	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
578
579	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
580	{
581	wrk->prev = &wrk_first;
582	wrk->next = wrk_first.next;
583	wrk_first.next->prev = wrk;
584	wrk_first.next = wrk;
585	started++;
586	}
587	else
588	free (wrk);
589
590	sigprocmask (SIG_SETMASK, &oldsigset, 0);
591	UNLOCK (wrklock);
592	}	466	}
593		467
594	static void req_send (aio_req req)	468	static SV *
		469	get_cb (SV *cb_sv)
595	{	470	{
596	while (started < wanted && nreqs >= started)	471	HV *st;
597	start_thread ();	472	GV *gvp;
		473	CV *cv;
598		474
599	++nreqs;	475	if (!SvOK (cb_sv))
600
601	LOCK (reqlock);
602	reqq_push (&req_queue, req);
603	pthread_cond_signal (&reqwait);
604	UNLOCK (reqlock);
605	}
606
607	static void end_thread (void)
608	{
609	aio_req req;
610
611	Newz (0, req, 1, aio_cb);
612
613	req->type = REQ_QUIT;
614	req->pri = PRI_MAX + PRI_BIAS;
615
616	req_send (req);
617	}
618
619	static void min_parallel (int nthreads)
620	{
621	if (wanted < nthreads)
622	wanted = nthreads;
623	}
624
625	static void max_parallel (int nthreads)
626	{
627	int cur = started;
628
629	if (wanted > nthreads)
630	wanted = nthreads;
631
632	while (cur > wanted)
633	{
634	end_thread ();
635	cur--;
636	}
637
638	while (started > wanted)
639	{
640	poll_wait ();
641	poll_cb ();
642	}
643	}
644
645	static void create_pipe ()
646	{
647	if (pipe (respipe))
648	croak ("unable to initialize result pipe");
649
650	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
651	croak ("cannot set result pipe to nonblocking mode");
652
653	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
654	croak ("cannot set result pipe to nonblocking mode");
655	}
656
657	/*****************************************************************************/
658	/* work around various missing functions */
659
660	#if !HAVE_PREADWRITE
661	# define pread aio_pread
662	# define pwrite aio_pwrite
663
664	/*
665	* make our pread/pwrite safe against themselves, but not against
666	* normal read/write by using a mutex. slows down execution a lot,
667	* but that's your problem, not mine.
668	*/
669	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
670
671	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
672	{
673	ssize_t res;
674	off_t ooffset;
675
676	LOCK (preadwritelock);
677	ooffset = lseek (fd, 0, SEEK_CUR);
678	lseek (fd, offset, SEEK_SET);
679	res = read (fd, buf, count);
680	lseek (fd, ooffset, SEEK_SET);
681	UNLOCK (preadwritelock);
682
683	return res;
684	}
685
686	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
687	{
688	ssize_t res;
689	off_t ooffset;
690
691	LOCK (preadwritelock);
692	ooffset = lseek (fd, 0, SEEK_CUR);
693	lseek (fd, offset, SEEK_SET);
694	res = write (fd, buf, count);
695	lseek (fd, offset, SEEK_SET);
696	UNLOCK (preadwritelock);
697
698	return res;
699	}
700	#endif
701
702	#if !HAVE_FDATASYNC
703	# define fdatasync fsync
704	#endif
705
706	#if !HAVE_READAHEAD
707	# define readahead aio_readahead
708
709	static ssize_t readahead (int fd, off_t offset, size_t count)
710	{
711	dBUF;
712
713	while (count > 0)
714	{
715	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
716
717	pread (fd, aio_buf, len, offset);
718	offset += len;
719	count -= len;
720	}
721
722	errno = 0;
723	}
724	#endif
725
726	#if !HAVE_READDIR_R
727	# define readdir_r aio_readdir_r
728
729	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
730
731	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
732	{
733	struct dirent *e;
734	int errorno;
735
736	LOCK (readdirlock);
737
738	e = readdir (dirp);
739	errorno = errno;
740
741	if (e)
742	{
743	*res = ent;
744	strcpy (ent->d_name, e->d_name);
745	}
746	else
747	*res = 0;
748
749	UNLOCK (readdirlock);
750
751	errno = errorno;
752	return e ? 0 : -1;
753	}
754	#endif
755
756	/* sendfile always needs emulation */
757	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
758	{
759	ssize_t res;
760
761	if (!count)
762	return 0;	476	return 0;
763		477
764	#if HAVE_SENDFILE	478	cv = sv_2cv (cb_sv, &st, &gvp, 0);
765	# if __linux
766	res = sendfile (ofd, ifd, &offset, count);
767		479
768	# elif __freebsd	480	if (!cv)
769	/*	481	croak ("IO::AIO callback must be undef or a CODE reference");
770	* Of course, the freebsd sendfile is a dire hack with no thoughts
771	* wasted on making it similar to other I/O functions.
772	*/
773	{
774	off_t sbytes;
775	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
776		482
777	if (res < 0 && sbytes)	483	return (SV *)cv;
778	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
779	res = sbytes;
780	}
781
782	# elif __hpux
783	res = sendfile (ofd, ifd, offset, count, 0, 0);
784
785	# elif __solaris
786	{
787	struct sendfilevec vec;
788	size_t sbytes;
789
790	vec.sfv_fd = ifd;
791	vec.sfv_flag = 0;
792	vec.sfv_off = offset;
793	vec.sfv_len = count;
794
795	res = sendfilev (ofd, &vec, 1, &sbytes);
796
797	if (res < 0 && sbytes)
798	res = sbytes;
799	}
800
801	# endif
802	#else
803	res = -1;
804	errno = ENOSYS;
805	#endif
806
807	if (res < 0
808	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
809	#if __solaris
810	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
811	#endif
812	)
813	)
814	{
815	/* emulate sendfile. this is a major pain in the ass */
816	dBUF;
817
818	res = 0;
819
820	while (count)
821	{
822	ssize_t cnt;
823
824	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
825
826	if (cnt <= 0)
827	{
828	if (cnt && !res) res = -1;
829	break;
830	}
831
832	cnt = write (ofd, aio_buf, cnt);
833
834	if (cnt <= 0)
835	{
836	if (cnt && !res) res = -1;
837	break;
838	}
839
840	offset += cnt;
841	res += cnt;
842	count -= cnt;
843	}
844	}
845
846	return res;
847	}
848
849	/* read a full directory */
850	static void scandir_ (aio_req req, worker *self)
851	{
852	DIR *dirp;
853	union
854	{
855	struct dirent d;
856	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
857	} *u;
858	struct dirent *entp;
859	char *name, *names;
860	int memlen = 4096;
861	int memofs = 0;
862	int res = 0;
863	int errorno;
864
865	LOCK (wrklock);
866	self->dirp = dirp = opendir (req->dataptr);
867	self->dbuf = u = malloc (sizeof (*u));
868	UNLOCK (wrklock);
869
870	req->data2ptr = names = malloc (memlen);
871
872	if (dirp && u && names)
873	for (;;)
874	{
875	errno = 0;
876	readdir_r (dirp, &u->d, &entp);
877
878	if (!entp)
879	break;
880
881	name = entp->d_name;
882
883	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
884	{
885	int len = strlen (name) + 1;
886
887	res++;
888
889	while (memofs + len > memlen)
890	{
891	memlen *= 2;
892	LOCK (wrklock);
893	req->data2ptr = names = realloc (names, memlen);
894	UNLOCK (wrklock);
895
896	if (!names)
897	break;
898	}
899
900	memcpy (names + memofs, name, len);
901	memofs += len;
902	}
903	}
904
905	if (errno)
906	res = -1;
907
908	req->result = res;
909	}
910
911	/*****************************************************************************/
912
913	static void *aio_proc (void *thr_arg)
914	{
915	aio_req req;
916	int type;
917	worker *self = (worker *)thr_arg;
918
919	do
920	{
921	LOCK (reqlock);
922
923	for (;;)
924	{
925	self->req = req = reqq_shift (&req_queue);
926
927	if (req)
928	break;
929
930	pthread_cond_wait (&reqwait, &reqlock);
931	}
932
933	UNLOCK (reqlock);
934
935	errno = 0; /* strictly unnecessary */
936	type = req->type; /* remember type for QUIT check */
937
938	if (!(req->flags & FLAG_CANCELLED))
939	switch (type)
940	{
941	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
942	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
943
944	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
945	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
946
947	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
948	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
949	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
950
951	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
952	case REQ_CLOSE: req->result = close (req->fd); break;
953	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
954	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
955	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
956	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
957	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
958
959	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
960	case REQ_FSYNC: req->result = fsync (req->fd); break;
961	case REQ_READDIR: scandir_ (req, self); break;
962
963	case REQ_BUSY:
964	{
965	struct timeval tv;
966
967	tv.tv_sec = req->fd;
968	tv.tv_usec = req->fd2;
969
970	req->result = select (0, 0, 0, 0, &tv);
971	}
972
973	case REQ_GROUP:
974	case REQ_NOP:
975	case REQ_QUIT:
976	break;
977
978	default:
979	req->result = ENOSYS;
980	break;
981	}
982
983	req->errorno = errno;
984
985	LOCK (reslock);
986
987	if (!reqq_push (&res_queue, req))
988	/* write a dummy byte to the pipe so fh becomes ready */
989	write (respipe [1], &respipe, 1);
990
991	self->req = 0;
992	worker_clear (self);
993
994	UNLOCK (reslock);
995	}
996	while (type != REQ_QUIT);
997
998	LOCK (wrklock);
999	worker_free (self);
1000	UNLOCK (wrklock);
1001
1002	return 0;
1003	}
1004
1005	/*****************************************************************************/
1006
1007	static void atfork_prepare (void)
1008	{
1009	LOCK (wrklock);
1010	LOCK (reqlock);
1011	LOCK (reslock);
1012	#if !HAVE_PREADWRITE
1013	LOCK (preadwritelock);
1014	#endif
1015	#if !HAVE_READDIR_R
1016	LOCK (readdirlock);
1017	#endif
1018	}
1019
1020	static void atfork_parent (void)
1021	{
1022	#if !HAVE_READDIR_R
1023	UNLOCK (readdirlock);
1024	#endif
1025	#if !HAVE_PREADWRITE
1026	UNLOCK (preadwritelock);
1027	#endif
1028	UNLOCK (reslock);
1029	UNLOCK (reqlock);
1030	UNLOCK (wrklock);
1031	}
1032
1033	static void atfork_child (void)
1034	{
1035	aio_req prv;
1036
1037	while (prv = reqq_shift (&req_queue))
1038	req_free (prv);
1039
1040	while (prv = reqq_shift (&res_queue))
1041	req_free (prv);
1042
1043	while (wrk_first.next != &wrk_first)
1044	{
1045	worker *wrk = wrk_first.next;
1046
1047	if (wrk->req)
1048	req_free (wrk->req);
1049
1050	worker_clear (wrk);
1051	worker_free (wrk);
1052	}
1053
1054	started = 0;
1055	nreqs = 0;
1056
1057	close (respipe [0]);
1058	close (respipe [1]);
1059	create_pipe ();
1060
1061	atfork_parent ();
1062	}	484	}
1063		485
1064	#define dREQ \	486	#define dREQ \
		487	SV *cb_cv; \
1065	aio_req req; \	488	aio_req req; \
1066	int req_pri = next_pri; \	489	int req_pri = next_pri; \
1067	next_pri = DEFAULT_PRI + PRI_BIAS; \	490	next_pri = EIO_PRI_DEFAULT; \
1068	\	491	\
1069	if (SvOK (callback) && !SvROK (callback)) \	492	cb_cv = get_cb (callback); \
1070	croak ("callback must be undef or of reference type"); \
1071	\	493	\
1072	Newz (0, req, 1, aio_cb); \	494	Newz (0, req, 1, eio_req); \
1073	if (!req) \	495	if (!req) \
1074	croak ("out of memory during aio_req allocation"); \	496	croak ("out of memory during eio_req allocation"); \
1075	\	497	\
1076	req->callback = newSVsv (callback); \	498	req->callback = SvREFCNT_inc (cb_cv); \
1077	req->pri = req_pri	499	req->pri = req_pri
1078		500
1079	#define REQ_SEND \	501	#define REQ_SEND \
		502	PUTBACK; \
1080	req_send (req); \	503	req_submit (req); \
		504	SPAGAIN; \
1081	\	505	\
1082	if (GIMME_V != G_VOID) \	506	if (GIMME_V != G_VOID) \
1083	XPUSHs (req_sv (req, AIO_REQ_KLASS));	507	XPUSHs (req_sv (req, AIO_REQ_KLASS));
1084		508
		509	static int
		510	extract_fd (SV *fh, int wr)
		511	{
		512	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		513
		514	if (fd < 0)
		515	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		516
		517	return fd;
		518	}
		519
1085	MODULE = IO::AIO PACKAGE = IO::AIO	520	MODULE = IO::AIO PACKAGE = IO::AIO
1086		521
1087	PROTOTYPES: ENABLE	522	PROTOTYPES: ENABLE
1088		523
1089	BOOT:	524	BOOT:
1090	{	525	{
1091	HV *stash = gv_stashpv ("IO::AIO", 1);	526	stash = gv_stashpv ("IO::AIO", 1);
		527
1092	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	528	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
		529	newCONSTSUB (stash, "ENOSYS", newSViv (ENOSYS));
1093	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	530	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
1094	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));	531	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
		532	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
		533	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
		534	#ifndef _WIN32
		535	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		536	#endif
		537	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
		538	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_BEFORE", newSViv (EIO_SYNC_FILE_RANGE_WAIT_BEFORE));
		539	newCONSTSUB (stash, "SYNC_FILE_RANGE_WRITE" , newSViv (EIO_SYNC_FILE_RANGE_WRITE));
		540	newCONSTSUB (stash, "SYNC_FILE_RANGE_WAIT_AFTER" , newSViv (EIO_SYNC_FILE_RANGE_WAIT_AFTER));
1095		541
1096	create_pipe ();	542	create_respipe ();
1097	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1098	}
1099		543
		544	if (eio_init (want_poll, done_poll) < 0)
		545	croak ("IO::AIO: unable to initialise eio library");
		546
		547	/* atfork child called in fifo order, so before eio's handler */
		548	X_THREAD_ATFORK (0, 0, atfork_child);
		549	}
		550
1100	void	551	void
1101	min_parallel (nthreads)	552	max_poll_reqs (int nreqs)
1102	int nthreads
1103	PROTOTYPE: $	553	PROTOTYPE: $
		554	CODE:
		555	eio_set_max_poll_reqs (nreqs);
1104		556
1105	void	557	void
1106	max_parallel (nthreads)	558	max_poll_time (double nseconds)
1107	int nthreads
1108	PROTOTYPE: $	559	PROTOTYPE: $
		560	CODE:
		561	eio_set_max_poll_time (nseconds);
1109		562
1110	void	563	void
		564	min_parallel (int nthreads)
		565	PROTOTYPE: $
		566	CODE:
		567	eio_set_min_parallel (nthreads);
		568
		569	void
		570	max_parallel (int nthreads)
		571	PROTOTYPE: $
		572	CODE:
		573	eio_set_max_parallel (nthreads);
		574
		575	void
		576	max_idle (int nthreads)
		577	PROTOTYPE: $
		578	CODE:
		579	eio_set_max_idle (nthreads);
		580
		581	void
		582	max_outstanding (int maxreqs)
		583	PROTOTYPE: $
		584	CODE:
		585	max_outstanding = maxreqs;
		586
		587	void
1111	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	588	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1112	SV * pathname
1113	int flags
1114	int mode
1115	SV * callback
1116	PROTOTYPE: $$$;$	589	PROTOTYPE: $$$;$
1117	PPCODE:	590	PPCODE:
1118	{	591	{
1119	dREQ;	592	dREQ;
1120		593
1121	req->type = REQ_OPEN;	594	req->type = EIO_OPEN;
1122	req->data = newSVsv (pathname);	595	req->sv1 = newSVsv (pathname);
1123	req->dataptr = SvPVbyte_nolen (req->data);	596	req->ptr1 = SvPVbyte_nolen (req->sv1);
1124	req->fd = flags;	597	req->int1 = flags;
1125	req->mode = mode;	598	req->int2 = mode;
1126		599
1127	REQ_SEND;	600	REQ_SEND;
1128	}	601	}
1129		602
1130	void	603	void
1131	aio_close (fh,callback=&PL_sv_undef)	604	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1132	SV * fh
1133	SV * callback
1134	PROTOTYPE: $;$	605	PROTOTYPE: $;$
1135	ALIAS:	606	ALIAS:
1136	aio_close = REQ_CLOSE
1137	aio_fsync = REQ_FSYNC	607	aio_fsync = EIO_FSYNC
1138	aio_fdatasync = REQ_FDATASYNC	608	aio_fdatasync = EIO_FDATASYNC
1139	PPCODE:	609	PPCODE:
1140	{	610	{
		611	int fd = extract_fd (fh, 0);
1141	dREQ;	612	dREQ;
1142		613
1143	req->type = ix;	614	req->type = ix;
1144	req->fh = newSVsv (fh);	615	req->sv1 = newSVsv (fh);
1145	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	616	req->int1 = fd;
1146		617
1147	REQ_SEND (req);	618	REQ_SEND (req);
1148	}	619	}
1149		620
1150	void	621	void
		622	aio_sync_file_range (SV *fh, SV *offset, SV *nbytes, IV flags, SV *callback=&PL_sv_undef)
		623	PROTOTYPE: $$$$;$
		624	PPCODE:
		625	{
		626	int fd = extract_fd (fh, 0);
		627	dREQ;
		628
		629	req->type = EIO_SYNC_FILE_RANGE;
		630	req->sv1 = newSVsv (fh);
		631	req->int1 = fd;
		632	req->offs = SvVAL64 (offset);
		633	req->size = SvVAL64 (nbytes);
		634	req->int2 = flags;
		635
		636	REQ_SEND (req);
		637	}
		638
		639	void
		640	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		641	PROTOTYPE: $;$
		642	PPCODE:
		643	{
		644	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		645	int fd = extract_fd (fh, 0);
		646	dREQ;
		647
		648	if (close_pipe < 0)
		649	{
		650	int pipefd [2];
		651
		652	if (pipe (pipefd) < 0
		653	|| close (pipefd [1]) < 0
		654	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		655	abort (); /*D*/
		656
		657	close_pipe = pipefd [0];
		658	}
		659
		660	req->type = EIO_DUP2;
		661	req->int1 = close_pipe;
		662	req->sv2 = newSVsv (fh);
		663	req->int2 = fd;
		664
		665	REQ_SEND (req);
		666	}
		667
		668	void
1151	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	669	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1152	SV * fh
1153	UV offset
1154	UV length
1155	SV * data
1156	UV dataoffset
1157	SV * callback
1158	ALIAS:	670	ALIAS:
1159	aio_read = REQ_READ	671	aio_read = EIO_READ
1160	aio_write = REQ_WRITE	672	aio_write = EIO_WRITE
1161	PROTOTYPE: $$$$$;$	673	PROTOTYPE: $$$$$;$
1162	PPCODE:	674	PPCODE:
1163	{	675	{
1164	aio_req req;
1165	STRLEN svlen;	676	STRLEN svlen;
		677	int fd = extract_fd (fh, ix == EIO_WRITE);
1166	char *svptr = SvPVbyte (data, svlen);	678	char *svptr = SvPVbyte (data, svlen);
1167		679	UV len = SvUV (length);
1168	SvUPGRADE (data, SVt_PV);
1169	SvPOK_on (data);
1170		680
1171	if (dataoffset < 0)	681	if (dataoffset < 0)
1172	dataoffset += svlen;	682	dataoffset += svlen;
1173		683
1174	if (dataoffset < 0 || dataoffset > svlen)	684	if (dataoffset < 0 || dataoffset > svlen)
1175	croak ("data offset outside of string");	685	croak ("dataoffset outside of data scalar");
1176		686
1177	if (ix == REQ_WRITE)	687	if (ix == EIO_WRITE)
1178	{	688	{
1179	/* write: check length and adjust. */	689	/* write: check length and adjust. */
1180	if (length < 0 || length + dataoffset > svlen)	690	if (!SvOK (length) || len + dataoffset > svlen)
1181	length = svlen - dataoffset;	691	len = svlen - dataoffset;
1182	}	692	}
1183	else	693	else
1184	{	694	{
1185	/* read: grow scalar as necessary */	695	/* read: check type and grow scalar as necessary */
		696	SvUPGRADE (data, SVt_PV);
1186	svptr = SvGROW (data, length + dataoffset);	697	svptr = SvGROW (data, len + dataoffset + 1);
1187	}	698	}
1188
1189	if (length < 0)
1190	croak ("length must not be negative");
1191		699
1192	{	700	{
1193	dREQ;	701	dREQ;
1194		702
1195	req->type = ix;	703	req->type = ix;
1196	req->fh = newSVsv (fh);	704	req->sv1 = newSVsv (fh);
1197	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	705	req->int1 = fd;
1198	: IoOFP (sv_2io (fh)));	706	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1199	req->offset = offset;	707	req->size = len;
1200	req->length = length;
1201	req->data = SvREFCNT_inc (data);	708	req->sv2 = SvREFCNT_inc (data);
1202	req->dataptr = (char *)svptr + dataoffset;	709	req->ptr2 = (char *)svptr + dataoffset;
		710	req->stroffset = dataoffset;
1203		711
1204	if (!SvREADONLY (data))	712	if (!SvREADONLY (data))
1205	{	713	{
1206	SvREADONLY_on (data);	714	SvREADONLY_on (data);
1207	req->data2ptr = (void *)data;	715	req->flags |= FLAG_SV2_RO_OFF;
1208	}	716	}
1209		717
1210	REQ_SEND;	718	REQ_SEND;
1211	}	719	}
1212	}	720	}
1213		721
1214	void	722	void
		723	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		724	PROTOTYPE: $$;$
		725	PPCODE:
		726	{
		727	SV *data;
		728	dREQ;
		729
		730	req->type = EIO_READLINK;
		731	req->sv1 = newSVsv (path);
		732	req->ptr1 = SvPVbyte_nolen (req->sv1);
		733
		734	REQ_SEND;
		735	}
		736
		737	void
1215	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	738	aio_sendfile (SV *out_fh, SV *in_fh, SV *in_offset, UV length, SV *callback=&PL_sv_undef)
1216	SV * out_fh
1217	SV * in_fh
1218	UV in_offset
1219	UV length
1220	SV * callback
1221	PROTOTYPE: $$$$;$	739	PROTOTYPE: $$$$;$
1222	PPCODE:	740	PPCODE:
1223	{	741	{
		742	int ifd = extract_fd (in_fh , 0);
		743	int ofd = extract_fd (out_fh, 0);
1224	dREQ;	744	dREQ;
1225		745
1226	req->type = REQ_SENDFILE;	746	req->type = EIO_SENDFILE;
1227	req->fh = newSVsv (out_fh);	747	req->sv1 = newSVsv (out_fh);
1228	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	748	req->int1 = ofd;
1229	req->fh2 = newSVsv (in_fh);	749	req->sv2 = newSVsv (in_fh);
1230	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	750	req->int2 = ifd;
1231	req->offset = in_offset;	751	req->offs = SvVAL64 (in_offset);
1232	req->length = length;	752	req->size = length;
1233		753
1234	REQ_SEND;	754	REQ_SEND;
1235	}	755	}
1236		756
1237	void	757	void
1238	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	758	aio_readahead (SV *fh, SV *offset, IV length, SV *callback=&PL_sv_undef)
1239	SV * fh
1240	UV offset
1241	IV length
1242	SV * callback
1243	PROTOTYPE: $$$;$	759	PROTOTYPE: $$$;$
1244	PPCODE:	760	PPCODE:
1245	{	761	{
		762	int fd = extract_fd (fh, 0);
1246	dREQ;	763	dREQ;
1247		764
1248	req->type = REQ_READAHEAD;	765	req->type = EIO_READAHEAD;
1249	req->fh = newSVsv (fh);	766	req->sv1 = newSVsv (fh);
1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	767	req->int1 = fd;
1251	req->offset = offset;	768	req->offs = SvVAL64 (offset);
1252	req->length = length;	769	req->size = length;
1253		770
1254	REQ_SEND;	771	REQ_SEND;
1255	}	772	}
1256		773
1257	void	774	void
1258	aio_stat (fh_or_path,callback=&PL_sv_undef)	775	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1259	SV * fh_or_path
1260	SV * callback
1261	ALIAS:	776	ALIAS:
1262	aio_stat = REQ_STAT	777	aio_stat = EIO_STAT
1263	aio_lstat = REQ_LSTAT	778	aio_lstat = EIO_LSTAT
1264	PPCODE:	779	PPCODE:
1265	{	780	{
1266	dREQ;	781	dREQ;
1267		782
1268	New (0, req->statdata, 1, Stat_t);	783	req->sv1 = newSVsv (fh_or_path);
1269	if (!req->statdata)
1270	{
1271	req_free (req);
1272	croak ("out of memory during aio_req->statdata allocation");
1273	}
1274		784
1275	if (SvPOK (fh_or_path))	785	if (SvPOK (req->sv1))
1276	{	786	{
1277	req->type = ix;	787	req->type = ix;
1278	req->data = newSVsv (fh_or_path);
1279	req->dataptr = SvPVbyte_nolen (req->data);	788	req->ptr1 = SvPVbyte_nolen (req->sv1);
1280	}	789	}
1281	else	790	else
1282	{	791	{
1283	req->type = REQ_FSTAT;	792	req->type = EIO_FSTAT;
1284	req->fh = newSVsv (fh_or_path);
1285	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	793	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1286	}	794	}
1287		795
1288	REQ_SEND;	796	REQ_SEND;
1289	}	797	}
1290		798
1291	void	799	void
		800	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		801	PPCODE:
		802	{
		803	dREQ;
		804
		805	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		806	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		807	req->sv1 = newSVsv (fh_or_path);
		808
		809	if (SvPOK (req->sv1))
		810	{
		811	req->type = EIO_UTIME;
		812	req->ptr1 = SvPVbyte_nolen (req->sv1);
		813	}
		814	else
		815	{
		816	req->type = EIO_FUTIME;
		817	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		818	}
		819
		820	REQ_SEND;
		821	}
		822
		823	void
		824	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		825	PPCODE:
		826	{
		827	dREQ;
		828
		829	req->sv1 = newSVsv (fh_or_path);
		830	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		831
		832	if (SvPOK (req->sv1))
		833	{
		834	req->type = EIO_TRUNCATE;
		835	req->ptr1 = SvPVbyte_nolen (req->sv1);
		836	}
		837	else
		838	{
		839	req->type = EIO_FTRUNCATE;
		840	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		841	}
		842
		843	REQ_SEND;
		844	}
		845
		846	void
		847	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		848	ALIAS:
		849	aio_chmod = EIO_CHMOD
		850	aio_mkdir = EIO_MKDIR
		851	PPCODE:
		852	{
		853	dREQ;
		854
		855	req->int2 = mode;
		856	req->sv1 = newSVsv (fh_or_path);
		857
		858	if (SvPOK (req->sv1))
		859	{
		860	req->type = ix;
		861	req->ptr1 = SvPVbyte_nolen (req->sv1);
		862	}
		863	else
		864	{
		865	req->type = EIO_FCHMOD;
		866	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		867	}
		868
		869	REQ_SEND;
		870	}
		871
		872	void
		873	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		874	PPCODE:
		875	{
		876	dREQ;
		877
		878	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		879	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		880	req->sv1 = newSVsv (fh_or_path);
		881
		882	if (SvPOK (req->sv1))
		883	{
		884	req->type = EIO_CHOWN;
		885	req->ptr1 = SvPVbyte_nolen (req->sv1);
		886	}
		887	else
		888	{
		889	req->type = EIO_FCHOWN;
		890	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		891	}
		892
		893	REQ_SEND;
		894	}
		895
		896	void
1292	aio_unlink (pathname,callback=&PL_sv_undef)	897	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1293	SV * pathname
1294	SV * callback
1295	ALIAS:	898	ALIAS:
1296	aio_unlink = REQ_UNLINK	899	aio_unlink = EIO_UNLINK
1297	aio_rmdir = REQ_RMDIR	900	aio_rmdir = EIO_RMDIR
1298	aio_readdir = REQ_READDIR	901	aio_readdir = EIO_READDIR
1299	PPCODE:	902	PPCODE:
1300	{	903	{
1301	dREQ;	904	dREQ;
1302		905
1303	req->type = ix;	906	req->type = ix;
1304	req->data = newSVsv (pathname);	907	req->sv1 = newSVsv (pathname);
1305	req->dataptr = SvPVbyte_nolen (req->data);	908	req->ptr1 = SvPVbyte_nolen (req->sv1);
		909
		910	REQ_SEND;
		911	}
		912
		913	void
		914	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		915	ALIAS:
		916	aio_link = EIO_LINK
		917	aio_symlink = EIO_SYMLINK
		918	aio_rename = EIO_RENAME
		919	PPCODE:
		920	{
		921	dREQ;
		922
		923	req->type = ix;
		924	req->sv1 = newSVsv (oldpath);
		925	req->ptr1 = SvPVbyte_nolen (req->sv1);
		926	req->sv2 = newSVsv (newpath);
		927	req->ptr2 = SvPVbyte_nolen (req->sv2);
1306		928
1307	REQ_SEND;	929	REQ_SEND;
1308	}	930	}
1309		931
1310	void	932	void
1311	aio_link (oldpath,newpath,callback=&PL_sv_undef)	933	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1312	SV * oldpath
1313	SV * newpath
1314	SV * callback
1315	ALIAS:
1316	aio_link = REQ_LINK
1317	aio_symlink = REQ_SYMLINK
1318	aio_rename = REQ_RENAME
1319	PPCODE:	934	PPCODE:
1320	{	935	{
1321	dREQ;	936	dREQ;
1322		937
1323	req->type = ix;	938	req->type = EIO_MKNOD;
1324	req->fh = newSVsv (oldpath);	939	req->sv1 = newSVsv (pathname);
1325	req->data2ptr = SvPVbyte_nolen (req->fh);	940	req->ptr1 = SvPVbyte_nolen (req->sv1);
1326	req->data = newSVsv (newpath);	941	req->int2 = (mode_t)mode;
1327	req->dataptr = SvPVbyte_nolen (req->data);	942	req->offs = dev;
1328		943
1329	REQ_SEND;	944	REQ_SEND;
1330	}	945	}
1331		946
1332	void	947	void
1333	aio_busy (delay,callback=&PL_sv_undef)	948	aio_busy (double delay, SV *callback=&PL_sv_undef)
1334	double delay
1335	SV * callback
1336	PPCODE:	949	PPCODE:
1337	{	950	{
1338	dREQ;	951	dREQ;
1339		952
1340	req->type = REQ_BUSY;	953	req->type = EIO_BUSY;
1341	req->fd = delay < 0. ? 0 : delay;	954	req->nv1 = delay < 0. ? 0. : delay;
1342	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1343		955
1344	REQ_SEND;	956	REQ_SEND;
1345	}	957	}
1346		958
1347	void	959	void
1348	aio_group (callback=&PL_sv_undef)	960	aio_group (SV *callback=&PL_sv_undef)
1349	SV * callback
1350	PROTOTYPE: ;$	961	PROTOTYPE: ;$
1351	PPCODE:	962	PPCODE:
1352	{	963	{
1353	dREQ;	964	dREQ;
1354		965
1355	req->type = REQ_GROUP;	966	req->type = EIO_GROUP;
		967
1356	req_send (req);	968	req_submit (req);
1357
1358	XPUSHs (req_sv (req, AIO_GRP_KLASS));	969	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1359	}	970	}
1360		971
1361	void	972	void
1362	aio_nop (callback=&PL_sv_undef)	973	aio_nop (SV *callback=&PL_sv_undef)
1363	SV * callback	974	ALIAS:
		975	aio_nop = EIO_NOP
		976	aio_sync = EIO_SYNC
1364	PPCODE:	977	PPCODE:
1365	{	978	{
1366	dREQ;	979	dREQ;
1367		980
1368	req->type = REQ_NOP;	981	req->type = ix;
1369		982
1370	REQ_SEND;	983	REQ_SEND;
1371	}	984	}
1372		985
1373	void	986	int
1374	aioreq_pri (int pri = DEFAULT_PRI)	987	aioreq_pri (int pri = 0)
1375	CODE:	988	PROTOTYPE: ;$
		989	CODE:
		990	RETVAL = next_pri;
		991	if (items > 0)
		992	{
1376	if (pri < PRI_MIN) pri = PRI_MIN;	993	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1377	if (pri > PRI_MAX) pri = PRI_MAX;	994	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1378	next_pri = pri + PRI_BIAS;	995	next_pri = pri;
		996	}
		997	OUTPUT:
		998	RETVAL
1379		999
1380	void	1000	void
1381	aioreq_nice (int nice = 0)	1001	aioreq_nice (int nice = 0)
1382	CODE:	1002	CODE:
1383	nice = next_pri - nice;	1003	nice = next_pri - nice;
1384	if (nice < PRI_MIN) nice = PRI_MIN;	1004	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1385	if (nice > PRI_MAX) nice = PRI_MAX;	1005	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1386	next_pri = nice + PRI_BIAS;	1006	next_pri = nice;
1387		1007
1388	void	1008	void
1389	flush ()	1009	flush ()
1390	PROTOTYPE:	1010	PROTOTYPE:
1391	CODE:	1011	CODE:
1392	while (nreqs)	1012	while (eio_nreqs ())
1393	{	1013	{
1394	poll_wait ();	1014	poll_wait ();
1395	poll_cb ();	1015	poll_cb ();
1396	}	1016	}
1397		1017
1398	void	1018	int
1399	poll()	1019	poll()
1400	PROTOTYPE:	1020	PROTOTYPE:
1401	CODE:	1021	CODE:
1402	if (nreqs)
1403	{
1404	poll_wait ();	1022	poll_wait ();
1405	poll_cb ();	1023	RETVAL = poll_cb ();
1406	}	1024	OUTPUT:
		1025	RETVAL
1407		1026
1408	int	1027	int
1409	poll_fileno()	1028	poll_fileno()
1410	PROTOTYPE:	1029	PROTOTYPE:
1411	CODE:	1030	CODE:
…		…
1423		1042
1424	void	1043	void
1425	poll_wait()	1044	poll_wait()
1426	PROTOTYPE:	1045	PROTOTYPE:
1427	CODE:	1046	CODE:
1428	if (nreqs)
1429	poll_wait ();	1047	poll_wait ();
1430		1048
1431	int	1049	int
1432	nreqs()	1050	nreqs()
1433	PROTOTYPE:	1051	PROTOTYPE:
1434	CODE:	1052	CODE:
1435	RETVAL = nreqs;	1053	RETVAL = eio_nreqs ();
1436	OUTPUT:	1054	OUTPUT:
1437	RETVAL	1055	RETVAL
1438		1056
		1057	int
		1058	nready()
		1059	PROTOTYPE:
		1060	CODE:
		1061	RETVAL = eio_nready ();
		1062	OUTPUT:
		1063	RETVAL
		1064
		1065	int
		1066	npending()
		1067	PROTOTYPE:
		1068	CODE:
		1069	RETVAL = eio_npending ();
		1070	OUTPUT:
		1071	RETVAL
		1072
		1073	int
		1074	nthreads()
		1075	PROTOTYPE:
		1076	CODE:
		1077	RETVAL = eio_nthreads ();
		1078	OUTPUT:
		1079	RETVAL
		1080
		1081	void _on_next_submit (SV *cb)
		1082	CODE:
		1083	SvREFCNT_dec (on_next_submit);
		1084	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1085
1439	PROTOTYPES: DISABLE	1086	PROTOTYPES: DISABLE
1440		1087
1441	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1088	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1442		1089
1443	void	1090	void
1444	cancel (aio_req_ornot req)	1091	cancel (aio_req_ornot req)
1445	CODE:	1092	CODE:
1446	req_cancel (req);	1093	eio_cancel (req);
1447		1094
1448	void	1095	void
1449	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1096	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1450	CODE:	1097	PPCODE:
		1098	{
		1099	if (GIMME_V != G_VOID)
		1100	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1101
		1102	if (items > 1)
		1103	{
		1104	SV *cb_cv = get_cb (callback);
		1105
1451	SvREFCNT_dec (req->callback);	1106	SvREFCNT_dec (req->callback);
1452	req->callback = newSVsv (callback);	1107	req->callback = SvREFCNT_inc (cb_cv);
		1108	}
		1109	}
1453		1110
1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1111	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1455		1112
1456	void	1113	void
1457	add (aio_req grp, ...)	1114	add (aio_req grp, ...)
1458	PPCODE:	1115	PPCODE:
1459	{	1116	{
1460	int i;	1117	int i;
1461	aio_req req;
1462		1118
1463	if (grp->fd == 2)	1119	if (grp->int1 == 2)
1464	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1120	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1465		1121
1466	for (i = 1; i < items; ++i )	1122	for (i = 1; i < items; ++i )
1467	{	1123	{
		1124	aio_req req;
		1125
1468	if (GIMME_V != G_VOID)	1126	if (GIMME_V != G_VOID)
1469	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1127	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1470		1128
1471	req = SvAIO_REQ (ST (i));	1129	req = SvAIO_REQ (ST (i));
1472		1130
1473	if (req)	1131	if (req)
1474	{	1132	eio_grp_add (grp, req);
1475	++grp->length;
1476	req->grp = grp;
1477
1478	req->grp_prev = 0;
1479	req->grp_next = grp->grp_first;
1480
1481	if (grp->grp_first)
1482	grp->grp_first->grp_prev = req;
1483
1484	grp->grp_first = req;
1485	}
1486	}	1133	}
1487	}	1134	}
1488		1135
1489	void	1136	void
1490	cancel_subs (aio_req_ornot req)	1137	cancel_subs (aio_req_ornot req)
…		…
1494	void	1141	void
1495	result (aio_req grp, ...)	1142	result (aio_req grp, ...)
1496	CODE:	1143	CODE:
1497	{	1144	{
1498	int i;	1145	int i;
		1146	AV *av;
		1147
		1148	grp->errorno = errno;
		1149
1499	AV *av = newAV ();	1150	av = newAV ();
1500		1151
1501	for (i = 1; i < items; ++i )	1152	for (i = 1; i < items; ++i )
1502	av_push (av, newSVsv (ST (i)));	1153	av_push (av, newSVsv (ST (i)));
1503		1154
1504	SvREFCNT_dec (grp->data);	1155	SvREFCNT_dec (grp->sv1);
1505	grp->data = (SV *)av;	1156	grp->sv1 = (SV *)av;
1506	}	1157	}
		1158
		1159	void
		1160	errno (aio_req grp, int errorno = errno)
		1161	CODE:
		1162	grp->errorno = errorno;
1507		1163
1508	void	1164	void
1509	limit (aio_req grp, int limit)	1165	limit (aio_req grp, int limit)
1510	CODE:	1166	CODE:
1511	grp->fd2 = limit;	1167	eio_grp_limit (grp, limit);
1512	aio_grp_feed (grp);
1513		1168
1514	void	1169	void
1515	feed (aio_req grp, SV *callback=&PL_sv_undef)	1170	feed (aio_req grp, SV *callback=&PL_sv_undef)
1516	CODE:	1171	CODE:
1517	{	1172	{
1518	SvREFCNT_dec (grp->fh2);	1173	SvREFCNT_dec (grp->sv2);
1519	grp->fh2 = newSVsv (callback);	1174	grp->sv2 = newSVsv (callback);
		1175	grp->feed = aio_grp_feed;
1520		1176
1521	if (grp->fd2 <= 0)	1177	if (grp->int2 <= 0)
1522	grp->fd2 = 2;	1178	grp->int2 = 2;
1523		1179
1524	aio_grp_feed (grp);	1180	eio_grp_limit (grp, grp->int2);
1525	}	1181	}
1526		1182

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