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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.85 by root, Sat Oct 28 23:32:29 2006 UTC vs.
Revision 1.168 by root, Wed Aug 4 14:02:58 2010 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"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
27	#include <limits.h>	17	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	18	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	19	#include <sched.h>
32		20
33	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
34	# if __linux
35	# include <sys/sendfile.h>	22	# include <sys/mman.h>
36	# elif __freebsd	23	#endif
37	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
38	# include <sys/uio.h>	68	# include <sys/time.h>
39	# elif __hpux
40	# include <sys/socket.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	#ifndef MAP_ANONYMOUS
		184	# ifdef MAP_ANON
		185	# define MAP_ANONYMOUS MAP_ANON
43	# else	186	# else
44	# error sendfile support requested but not available	187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	188	# endif
46	#endif	189	#endif
47		190	#ifndef MAP_HUGETLB
48	/* number of seconds after which idle threads exit */	191	# define MAP_HUGETLB 0
49	#define IDLE_TIMEOUT 10
50
51	/* used for struct dirent, AIX doesn't provide it */
52	#ifndef NAME_MAX
53	# define NAME_MAX 4096
54	#endif
55
56	#ifndef PTHREAD_STACK_MIN
57	/* care for broken platforms, e.g. windows */
58	# define PTHREAD_STACK_MIN 16384
59	#endif
60
61	#if __ia64
62	# define STACKSIZE 65536
63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
64	# define STACKSIZE PTHREAD_STACK_MIN
65	#else
66	# define STACKSIZE 16384
67	#endif
68
69	/* wether word reads are potentially non-atomic.
70	* this is conservatice, likely most arches this runs
71	* on have atomic word read/writes.
72	*/
73	#ifndef WORDACCESS_UNSAFE
74	# if __i386 || __x86_64
75	# define WORDACCESS_UNSAFE 0
76	# else
77	# define WORDACCESS_UNSAFE 1
78	# endif	192	#endif
		193	#ifndef MAP_LOCKED
		194	# define MAP_LOCKED 0
79	#endif	195	#endif
		196	#ifndef MAP_NORESERVE
		197	# define MAP_NORESERVE 0
		198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
80		205
81	/* buffer size for various temporary buffers */	206	#ifndef PAGESIZE
82	#define AIO_BUFSIZE 65536	207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
83		209
84	#define dBUF \	210	static int req_invoke (eio_req *req);
85	char *aio_buf; \	211	#define EIO_FINISH(req) req_invoke (req)
86	LOCK (wrklock); \	212	static void req_destroy (eio_req *grp);
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	213	#define EIO_DESTROY(req) req_destroy (req)
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91		214
92	enum {	215	enum {
93	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
94	REQ_OPEN, REQ_CLOSE,
95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
96	REQ_SENDFILE,
97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
98	REQ_FSYNC, REQ_FDATASYNC,
99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
100	REQ_MKNOD, REQ_READDIR,
101	REQ_LINK, REQ_SYMLINK,
102	REQ_GROUP, REQ_NOP,
103	REQ_BUSY,
104	};	217	};
105		218
106	#define AIO_REQ_KLASS "IO::AIO::REQ"	219	#include "libeio/eio.c"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"
108		220
109	typedef struct aio_cb
110	{
111	struct aio_cb *volatile next;
112
113	SV *data, *callback;
114	SV *fh, *fh2;
115	void *dataptr, *data2ptr;
116	Stat_t *statdata;
117	off_t offset;
118	size_t length;
119	ssize_t result;
120
121	STRLEN dataoffset;
122	int type;
123	int fd, fd2;
124	int errorno;
125	mode_t mode; /* open */
126
127	unsigned char flags;
128	unsigned char pri;
129
130	SV *self; /* the perl counterpart of this request, if any */
131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
132	} aio_cb;
133
134	enum {
135	FLAG_CANCELLED = 0x01,
136	};
137
138	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
139	typedef aio_cb *aio_req_ornot;	222	typedef eio_req *aio_req_ornot;
140		223
141	enum {	224	static SV *on_next_submit;
142	PRI_MIN = -4,	225	static int next_pri = EIO_PRI_DEFAULT;
143	PRI_MAX = 4,	226	static int max_outstanding;
144		227
145	DEFAULT_PRI = 0,	228	static s_epipe respipe;
146	PRI_BIAS = -PRI_MIN,
147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148	};
149		229
150	#define AIO_TICKS ((1000000 + 1023) >> 10)
151
152	static unsigned int max_poll_time = 0;
153	static unsigned int max_poll_reqs = 0;
154
155	/* calculcate time difference in ~1/AIO_TICKS of a second */
156	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
157	{
158	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
159	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
160	}
161
162	static int next_pri = DEFAULT_PRI + PRI_BIAS;
163
164	static unsigned int started, idle, wanted;
165
166	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
167	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
168	#else
169	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
170	#endif
171
172	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
173	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
174
175	/* worker threads management */
176	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
177
178	typedef struct worker {
179	/* locked by wrklock */
180	struct worker *prev, *next;
181
182	pthread_t tid;
183
184	/* locked by reslock, reqlock or wrklock */
185	aio_req req; /* currently processed request */
186	void *dbuf;
187	DIR *dirp;
188	} worker;
189
190	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
191
192	static void worker_clear (worker *wrk)
193	{
194	if (wrk->dirp)
195	{
196	closedir (wrk->dirp);
197	wrk->dirp = 0;
198	}
199
200	if (wrk->dbuf)
201	{
202	free (wrk->dbuf);
203	wrk->dbuf = 0;
204	}
205	}
206
207	static void worker_free (worker *wrk)
208	{
209	wrk->next->prev = wrk->prev;
210	wrk->prev->next = wrk->next;
211
212	free (wrk);
213	}
214
215	static volatile unsigned int nreqs, nready, npending;
216	static volatile unsigned int max_idle = 4;
217	static volatile unsigned int max_outstanding = 0xffffffff;
218	static int respipe [2];
219
220	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
221	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
222	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
223
224	#if WORDACCESS_UNSAFE
225
226	static unsigned int get_nready ()
227	{
228	unsigned int retval;
229
230	LOCK (reqlock);
231	retval = nready;
232	UNLOCK (reqlock);
233
234	return retval;
235	}
236
237	static unsigned int get_npending ()
238	{
239	unsigned int retval;
240
241	LOCK (reslock);
242	retval = npending;
243	UNLOCK (reslock);
244
245	return retval;
246	}
247
248	static unsigned int get_nthreads ()
249	{
250	unsigned int retval;
251
252	LOCK (wrklock);
253	retval = started;
254	UNLOCK (wrklock);
255
256	return retval;
257	}
258
259	#else
260
261	# define get_nready() nready
262	# define get_npending() npending
263	# define get_nthreads() started
264
265	#endif
266
267	/*
268	* a somewhat faster data structure might be nice, but
269	* with 8 priorities this actually needs <20 insns
270	* per shift, the most expensive operation.
271	*/
272	typedef struct {
273	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
274	int size;
275	} reqq;
276
277	static reqq req_queue;
278	static reqq res_queue;
279
280	int reqq_push (reqq *q, aio_req req)
281	{
282	int pri = req->pri;
283	req->next = 0;
284
285	if (q->qe[pri])
286	{
287	q->qe[pri]->next = req;
288	q->qe[pri] = req;
289	}
290	else
291	q->qe[pri] = q->qs[pri] = req;
292
293	return q->size++;
294	}
295
296	aio_req reqq_shift (reqq *q)
297	{
298	int pri;
299
300	if (!q->size)
301	return 0;
302
303	--q->size;
304
305	for (pri = NUM_PRI; pri--; )
306	{
307	aio_req req = q->qs[pri];
308
309	if (req)
310	{
311	if (!(q->qs[pri] = req->next))
312	q->qe[pri] = 0;
313
314	return req;
315	}
316	}
317
318	abort ();
319	}
320
321	static int poll_cb ();
322	static void req_invoke (aio_req req);
323	static void req_free (aio_req req);	230	static void req_destroy (aio_req req);
324	static void req_cancel (aio_req req);	231	static void req_cancel (aio_req req);
325		232
		233	static void want_poll (void)
		234	{
		235	/* write a dummy byte to the pipe so fh becomes ready */
		236	s_epipe_signal (&respipe);
		237	}
		238
		239	static void done_poll (void)
		240	{
		241	/* read any signals sent by the worker threads */
		242	s_epipe_drain (&respipe);
		243	}
		244
326	/* must be called at most once */	245	/* must be called at most once */
327	static SV *req_sv (aio_req req, const char *klass)	246	static SV *req_sv (aio_req req, HV *stash)
328	{	247	{
329	if (!req->self)	248	if (!req->self)
330	{	249	{
331	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
332	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
333	}	252	}
334		253
335	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
336	}	255	}
337		256
338	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
339	{	258	{
340	MAGIC *mg;	259	MAGIC *mg;
341		260
342	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	261	if (!SvROK (sv)
		262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		263	&& SvSTASH (SvRV (sv)) != aio_req_stash
		264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
343	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
344		266
345	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
346		268
347	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
348	}	270	}
349		271
350	static void aio_grp_feed (aio_req grp)	272	static void aio_grp_feed (aio_req grp)
351	{	273	{
352	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	274	if (grp->sv2 && SvOK (grp->sv2))
353	{	275	{
354	int old_len = grp->length;
355
356	if (grp->fh2 && SvOK (grp->fh2))
357	{
358	dSP;	276	dSP;
359		277
360	ENTER;	278	ENTER;
361	SAVETMPS;	279	SAVETMPS;
362	PUSHMARK (SP);	280	PUSHMARK (SP);
363	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	281	XPUSHs (req_sv (grp, aio_grp_stash));
364	PUTBACK;	282	PUTBACK;
365	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
366	SPAGAIN;	284	SPAGAIN;
367	FREETMPS;	285	FREETMPS;
368	LEAVE;	286	LEAVE;
369	}
370
371	/* stop if no progress has been made */
372	if (old_len == grp->length)
373	{
374	SvREFCNT_dec (grp->fh2);
375	grp->fh2 = 0;
376	break;
377	}
378	}	287	}
379	}	288	}
380		289
381	static void aio_grp_dec (aio_req grp)	290	static void req_submit (eio_req *req)
382	{	291	{
383	--grp->length;	292	eio_submit (req);
384		293
385	/* call feeder, if applicable */	294	if (expect_false (on_next_submit))
386	aio_grp_feed (grp);
387
388	/* finish, if done */
389	if (!grp->length && grp->fd)
390	{	295	{
391	req_invoke (grp);	296	dSP;
392	req_free (grp);	297	SV *cb = sv_2mortal (on_next_submit);
		298
		299	on_next_submit = 0;
		300
		301	PUSHMARK (SP);
		302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
393	}	304	}
394	}	305	}
395		306
396	static void req_invoke (aio_req req)	307	static int req_invoke (eio_req *req)
397	{	308	{
398	dSP;	309	if (req->flags & FLAG_SV2_RO_OFF)
		310	SvREADONLY_off (req->sv2);
399		311
400	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	312	if (!EIO_CANCELLED (req) && req->callback)
401	{	313	{
		314	dSP;
		315	static SV *sv_result_cache; /* caches the result integer SV */
		316	SV *sv_result;
		317
402	ENTER;	318	ENTER;
403	SAVETMPS;	319	SAVETMPS;
404	PUSHMARK (SP);	320	PUSHMARK (SP);
405	EXTEND (SP, 1);	321	EXTEND (SP, 1);
406		322
		323	/* do not recreate the result IV from scratch each time */
		324	if (expect_true (sv_result_cache))
		325	{
		326	sv_result = sv_result_cache; sv_result_cache = 0;
		327	SvIV_set (sv_result, req->result);
		328	}
		329	else
		330	{
		331	sv_result = newSViv (req->result);
		332	SvREADONLY_on (sv_result);
		333	}
		334
407	switch (req->type)	335	switch (req->type)
408	{	336	{
409	case REQ_READDIR:	337	case EIO_READDIR:
410	{	338	{
411	SV *rv = &PL_sv_undef;	339	SV *rv = &PL_sv_undef;
412		340
413	if (req->result >= 0)	341	if (req->result >= 0)
414	{	342	{
415	int i;	343	int i;
416	char *buf = req->data2ptr;	344	char *names = (char *)req->ptr2;
		345	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
417	AV *av = newAV ();	346	AV *av = newAV ();
418		347
419	av_extend (av, req->result - 1);	348	av_extend (av, req->result - 1);
420		349
421	for (i = 0; i < req->result; ++i)	350	for (i = 0; i < req->result; ++i)
422	{	351	{
423	SV *sv = newSVpv (buf, 0);	352	if (req->int1 & EIO_READDIR_DENTS)
		353	{
		354	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
424		355
		356	if (req->int1 & EIO_READDIR_CUSTOM2)
		357	{
		358	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		359	AV *avent = newAV ();
		360
		361	av_extend (avent, 2);
		362
		363	if (!sv_type [ent->type])
		364	{
		365	sv_type [ent->type] = newSViv (ent->type);
		366	SvREADONLY_on (sv_type [ent->type]);
		367	}
		368
		369	av_store (avent, 0, namesv);
		370	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		371	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		372
		373	av_store (av, i, newRV_noinc ((SV *)avent));
		374	}
		375	else
425	av_store (av, i, sv);	376	av_store (av, i, namesv);
		377
		378	++ent;
		379	}
		380	else
		381	{
		382	SV *name = newSVpv (names, 0);
		383	av_store (av, i, name);
426	buf += SvCUR (sv) + 1;	384	names += SvCUR (name) + 1;
		385	}
427	}	386	}
428		387
429	rv = sv_2mortal (newRV_noinc ((SV *)av));	388	rv = sv_2mortal (newRV_noinc ((SV *)av));
430	}	389	}
431		390
432	PUSHs (rv);	391	PUSHs (rv);
		392
		393	if (req->int1 & EIO_READDIR_CUSTOM1)
		394	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
433	}	395	}
434	break;	396	break;
435		397
436	case REQ_OPEN:	398	case EIO_OPEN:
437	{	399	{
438	/* convert fd to fh */	400	/* convert fd to fh */
439	SV *fh;	401	SV *fh = &PL_sv_undef;
440		402
441	PUSHs (sv_2mortal (newSViv (req->result)));	403	if (req->result >= 0)
442	PUTBACK;	404	{
443	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	405	GV *gv = (GV *)sv_newmortal ();
444	SPAGAIN;	406	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		407	char sym [64];
		408	int symlen;
		409
		410	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		411	gv_init (gv, aio_stash, sym, symlen, 0);
445		412
446	fh = SvREFCNT_inc (POPs);	413	symlen = snprintf (
		414	sym,
		415	sizeof (sym),
		416	"%s&=%d",
		417	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		418	(int)req->result
		419	);
447		420
		421	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		422	fh = (SV *)gv;
		423	}
		424
448	PUSHMARK (SP);	425	PUSHs (fh);
449	XPUSHs (sv_2mortal (fh));
450	}	426	}
451	break;	427	break;
452		428
		429	case EIO_STATVFS:
		430	case EIO_FSTATVFS:
		431	{
		432	SV *rv = &PL_sv_undef;
		433
		434	if (req->result >= 0)
		435	{
		436	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		437	HV *hv = newHV ();
		438
		439	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		440
		441	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		442	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		443	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		444	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		445	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		446	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		447	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		448	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		449	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		450	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		451	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		452	}
		453
		454	PUSHs (rv);
		455	}
		456
		457	break;
		458
453	case REQ_GROUP:	459	case EIO_GROUP:
454	req->fd = 2; /* mark group as finished */	460	req->int1 = 2; /* mark group as finished */
455		461
456	if (req->data)	462	if (req->sv1)
457	{	463	{
458	int i;	464	int i;
459	AV *av = (AV *)req->data;	465	AV *av = (AV *)req->sv1;
460		466
461	EXTEND (SP, AvFILL (av) + 1);	467	EXTEND (SP, AvFILL (av) + 1);
462	for (i = 0; i <= AvFILL (av); ++i)	468	for (i = 0; i <= AvFILL (av); ++i)
463	PUSHs (*av_fetch (av, i, 0));	469	PUSHs (*av_fetch (av, i, 0));
464	}	470	}
465	break;	471	break;
466		472
467	case REQ_NOP:	473	case EIO_NOP:
468	case REQ_BUSY:	474	case EIO_BUSY:
469	break;	475	break;
470		476
		477	case EIO_READLINK:
		478	if (req->result > 0)
		479	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		480	break;
		481
		482	case EIO_STAT:
		483	case EIO_LSTAT:
		484	case EIO_FSTAT:
		485	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		486	PL_laststatval = req->result;
		487	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		488	PUSHs (sv_result);
		489	break;
		490
		491	case EIO_READ:
		492	{
		493	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		494	*SvEND (req->sv2) = 0;
		495	SvPOK_only (req->sv2);
		496	SvSETMAGIC (req->sv2);
		497	PUSHs (sv_result);
		498	}
		499	break;
		500
		501	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		502	if (req->result > 0)
		503	SvIV_set (sv_result, 0);
		504	/* FALLTHROUGH */
		505
471	default:	506	default:
472	PUSHs (sv_2mortal (newSViv (req->result)));	507	PUSHs (sv_result);
473	break;	508	break;
474	}	509	}
475		510
476	errno = req->errorno;	511	errno = req->errorno;
477		512
478	PUTBACK;	513	PUTBACK;
479	call_sv (req->callback, G_VOID | G_EVAL);	514	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
480	SPAGAIN;	515	SPAGAIN;
		516
		517	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		518	SvREFCNT_dec (sv_result);
		519	else
		520	sv_result_cache = sv_result;
481		521
482	FREETMPS;	522	FREETMPS;
483	LEAVE;	523	LEAVE;
		524
		525	PUTBACK;
484	}	526	}
485		527
486	if (req->grp)	528	return !!SvTRUE (ERRSV);
487	{
488	aio_req grp = req->grp;
489
490	/* unlink request */
491	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
492	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
493
494	if (grp->grp_first == req)
495	grp->grp_first = req->grp_next;
496
497	aio_grp_dec (grp);
498	}
499
500	if (SvTRUE (ERRSV))
501	{
502	req_free (req);
503	croak (0);
504	}
505	}	529	}
506		530
507	static void req_free (aio_req req)	531	static void req_destroy (aio_req req)
508	{	532	{
509	if (req->self)	533	if (req->self)
510	{	534	{
511	sv_unmagic (req->self, PERL_MAGIC_ext);	535	sv_unmagic (req->self, PERL_MAGIC_ext);
512	SvREFCNT_dec (req->self);	536	SvREFCNT_dec (req->self);
513	}	537	}
514		538
515	SvREFCNT_dec (req->data);
516	SvREFCNT_dec (req->fh);	539	SvREFCNT_dec (req->sv1);
517	SvREFCNT_dec (req->fh2);	540	SvREFCNT_dec (req->sv2);
518	SvREFCNT_dec (req->callback);	541	SvREFCNT_dec (req->callback);
519	Safefree (req->statdata);
520
521	if (req->type == REQ_READDIR)
522	free (req->data2ptr);
523		542
524	Safefree (req);	543	Safefree (req);
525	}	544	}
526		545
527	static void req_cancel_subs (aio_req grp)	546	static void req_cancel_subs (aio_req grp)
528	{	547	{
529	aio_req sub;	548	aio_req sub;
530		549
531	if (grp->type != REQ_GROUP)	550	if (grp->type != EIO_GROUP)
532	return;	551	return;
533		552
534	SvREFCNT_dec (grp->fh2);	553	SvREFCNT_dec (grp->sv2);
535	grp->fh2 = 0;	554	grp->sv2 = 0;
536		555
537	for (sub = grp->grp_first; sub; sub = sub->grp_next)	556	eio_grp_cancel (grp);
538	req_cancel (sub);
539	}	557	}
540		558
541	static void req_cancel (aio_req req)	559	static void
		560	create_respipe (void)
542	{	561	{
543	req->flags |= FLAG_CANCELLED;	562	if (s_epipe_renew (&respipe))
544		563	croak ("IO::AIO: unable to initialize result pipe");
545	req_cancel_subs (req);
546	}	564	}
547		565
548	static void *aio_proc(void *arg);
549
550	static void start_thread (void)
551	{
552	sigset_t fullsigset, oldsigset;
553	pthread_attr_t attr;
554
555	worker *wrk = calloc (1, sizeof (worker));
556
557	if (!wrk)
558	croak ("unable to allocate worker thread data");
559
560	pthread_attr_init (&attr);
561	pthread_attr_setstacksize (&attr, STACKSIZE);
562	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
563	#ifdef PTHREAD_SCOPE_PROCESS
564	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
565	#endif
566
567	sigfillset (&fullsigset);
568
569	LOCK (wrklock);
570	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
571
572	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
573	{
574	wrk->prev = &wrk_first;
575	wrk->next = wrk_first.next;
576	wrk_first.next->prev = wrk;
577	wrk_first.next = wrk;
578	++started;
579	}
580	else
581	free (wrk);
582
583	sigprocmask (SIG_SETMASK, &oldsigset, 0);
584	UNLOCK (wrklock);
585	}
586
587	static void maybe_start_thread ()
588	{
589	if (get_nthreads () >= wanted)
590	return;
591
592	/* todo: maybe use idle here, but might be less exact */
593	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
594	return;
595
596	start_thread ();
597	}
598
599	static void req_send (aio_req req)
600	{
601	++nreqs;
602
603	LOCK (reqlock);
604	++nready;
605	reqq_push (&req_queue, req);
606	pthread_cond_signal (&reqwait);
607	UNLOCK (reqlock);
608
609	maybe_start_thread ();
610	}
611
612	static void end_thread (void)
613	{
614	aio_req req;
615
616	Newz (0, req, 1, aio_cb);
617
618	req->type = REQ_QUIT;
619	req->pri = PRI_MAX + PRI_BIAS;
620
621	LOCK (reqlock);
622	reqq_push (&req_queue, req);
623	pthread_cond_signal (&reqwait);
624	UNLOCK (reqlock);
625
626	LOCK (wrklock);
627	--started;
628	UNLOCK (wrklock);
629	}
630
631	static void set_max_idle (int nthreads)
632	{
633	if (WORDACCESS_UNSAFE) LOCK (reqlock);
634	max_idle = nthreads <= 0 ? 1 : nthreads;
635	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
636	}
637
638	static void min_parallel (int nthreads)
639	{
640	if (wanted < nthreads)
641	wanted = nthreads;
642	}
643
644	static void max_parallel (int nthreads)
645	{
646	if (wanted > nthreads)
647	wanted = nthreads;
648
649	while (started > wanted)
650	end_thread ();
651	}
652
653	static void poll_wait ()	566	static void poll_wait (void)
654	{	567	{
655	fd_set rfd;
656
657	while (nreqs)	568	while (eio_nreqs ())
658	{	569	{
659	int size;	570	int size;
660	if (WORDACCESS_UNSAFE) LOCK (reslock);	571
		572	X_LOCK (reslock);
661	size = res_queue.size;	573	size = res_queue.size;
662	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	574	X_UNLOCK (reslock);
663		575
664	if (size)	576	if (size)
665	return;	577	return;
666		578
667	maybe_start_thread ();	579	etp_maybe_start_thread ();
668		580
669	FD_ZERO(&rfd);	581	s_epipe_wait (&respipe);
670	FD_SET(respipe [0], &rfd);
671
672	select (respipe [0] + 1, &rfd, 0, 0, 0);
673	}	582	}
674	}	583	}
675		584
676	static int poll_cb ()	585	static int poll_cb (void)
677	{	586	{
678	dSP;
679	int count = 0;
680	int maxreqs = max_poll_reqs;
681	int do_croak = 0;
682	struct timeval tv_start, tv_now;
683	aio_req req;
684
685	if (max_poll_time)
686	gettimeofday (&tv_start, 0);
687
688	for (;;)	587	for (;;)
689	{	588	{
690	for (;;)	589	int res = eio_poll ();
691	{
692	maybe_start_thread ();
693		590
694	LOCK (reslock);	591	if (res > 0)
695	req = reqq_shift (&res_queue);
696
697	if (req)
698	{
699	--npending;
700
701	if (!res_queue.size)
702	{
703	/* read any signals sent by the worker threads */
704	char buf [32];
705	while (read (respipe [0], buf, 32) == 32)
706	;
707	}
708	}
709
710	UNLOCK (reslock);
711
712	if (!req)
713	break;
714
715	--nreqs;
716
717	if (req->type == REQ_GROUP && req->length)
718	{
719	req->fd = 1; /* mark request as delayed */
720	continue;
721	}
722	else
723	{
724	if (req->type == REQ_READ)
725	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
726
727	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
728	SvREADONLY_off (req->data);
729
730	if (req->statdata)
731	{
732	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
733	PL_laststatval = req->result;
734	PL_statcache = *(req->statdata);
735	}
736
737	req_invoke (req);
738
739	count++;
740	}
741
742	req_free (req);
743
744	if (maxreqs && !--maxreqs)
745	break;
746
747	if (max_poll_time)
748	{
749	gettimeofday (&tv_now, 0);
750
751	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
752	break;
753	}
754	}
755
756	if (nreqs <= max_outstanding)
757	break;	592	croak (0);
		593
		594	if (!max_outstanding || max_outstanding > eio_nreqs ())
		595	return res;
758		596
759	poll_wait ();	597	poll_wait ();
760
761	++maxreqs;
762	}	598	}
763
764	return count;
765	}	599	}
766		600
767	static void create_pipe ()	601	static void atfork_child (void)
768	{	602	{
769	if (pipe (respipe))	603	create_respipe ();
770	croak ("unable to initialize result pipe");
771
772	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
773	croak ("cannot set result pipe to nonblocking mode");
774
775	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
776	croak ("cannot set result pipe to nonblocking mode");
777	}	604	}
778		605
779	/*****************************************************************************/	606	/*****************************************************************************/
780	/* work around various missing functions */
781		607
782	#if !HAVE_PREADWRITE	608	#if !_POSIX_MAPPED_FILES
783	# define pread aio_pread	609	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
784	# define pwrite aio_pwrite	610	# define munmap(addr,length) (errno = ENOSYS, -1)
785
786	/*
787	* make our pread/pwrite safe against themselves, but not against
788	* normal read/write by using a mutex. slows down execution a lot,
789	* but that's your problem, not mine.
790	*/
791	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
792
793	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
794	{
795	ssize_t res;
796	off_t ooffset;
797
798	LOCK (preadwritelock);
799	ooffset = lseek (fd, 0, SEEK_CUR);
800	lseek (fd, offset, SEEK_SET);
801	res = read (fd, buf, count);
802	lseek (fd, ooffset, SEEK_SET);
803	UNLOCK (preadwritelock);
804
805	return res;
806	}
807
808	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
809	{
810	ssize_t res;
811	off_t ooffset;
812
813	LOCK (preadwritelock);
814	ooffset = lseek (fd, 0, SEEK_CUR);
815	lseek (fd, offset, SEEK_SET);
816	res = write (fd, buf, count);
817	lseek (fd, offset, SEEK_SET);
818	UNLOCK (preadwritelock);
819
820	return res;
821	}
822	#endif
823
824	#if !HAVE_FDATASYNC
825	# define fdatasync fsync
826	#endif
827
828	#if !HAVE_READAHEAD
829	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
830
831	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
832	{
833	dBUF;
834
835	while (count > 0)
836	{
837	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
838
839	pread (fd, aio_buf, len, offset);
840	offset += len;
841	count -= len;
842	}
843
844	errno = 0;
845	}
846
847	#endif
848
849	#if !HAVE_READDIR_R
850	# define readdir_r aio_readdir_r
851
852	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
853
854	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
855	{
856	struct dirent *e;
857	int errorno;
858
859	LOCK (readdirlock);
860
861	e = readdir (dirp);
862	errorno = errno;
863
864	if (e)
865	{
866	*res = ent;
867	strcpy (ent->d_name, e->d_name);
868	}
869	else
870	*res = 0;
871
872	UNLOCK (readdirlock);
873
874	errno = errorno;
875	return e ? 0 : -1;
876	}
877	#endif
878
879	/* sendfile always needs emulation */
880	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
881	{
882	ssize_t res;
883
884	if (!count)
885	return 0;
886
887	#if HAVE_SENDFILE
888	# if __linux
889	res = sendfile (ofd, ifd, &offset, count);
890
891	# elif __freebsd
892	/*
893	* Of course, the freebsd sendfile is a dire hack with no thoughts
894	* wasted on making it similar to other I/O functions.
895	*/
896	{
897	off_t sbytes;
898	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
899
900	if (res < 0 && sbytes)
901	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
902	res = sbytes;
903	}
904
905	# elif __hpux
906	res = sendfile (ofd, ifd, offset, count, 0, 0);
907
908	# elif __solaris
909	{
910	struct sendfilevec vec;
911	size_t sbytes;
912
913	vec.sfv_fd = ifd;
914	vec.sfv_flag = 0;
915	vec.sfv_off = offset;
916	vec.sfv_len = count;
917
918	res = sendfilev (ofd, &vec, 1, &sbytes);
919
920	if (res < 0 && sbytes)
921	res = sbytes;
922	}
923
924	# endif	611	#endif
925	#else
926	res = -1;
927	errno = ENOSYS;
928	#endif
929		612
930	if (res < 0	613	#define MMAP_MAGIC PERL_MAGIC_ext
931	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
932	#if __solaris
933	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
934	#endif
935	)
936	)
937	{
938	/* emulate sendfile. this is a major pain in the ass */
939	dBUF;
940		614
941	res = 0;	615	static int
		616	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		617	{
		618	int old_errno = errno;
		619	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		620	errno = old_errno;
942		621
943	while (count)	622	mg->mg_obj = 0; /* just in case */
944	{
945	ssize_t cnt;
946
947	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
948		623
949	if (cnt <= 0)	624	SvREADONLY_off (sv);
950	{
951	if (cnt && !res) res = -1;
952	break;
953	}
954		625
955	cnt = write (ofd, aio_buf, cnt);	626	if (SvPVX (sv) != mg->mg_ptr)
		627	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
956		628
957	if (cnt <= 0)	629	SvCUR_set (sv, 0);
958	{	630	SvPVX (sv) = 0;
959	if (cnt && !res) res = -1;	631	SvOK_off (sv);
960	break;
961	}
962		632
963	offset += cnt;
964	res += cnt;
965	count -= cnt;
966	}
967	}
968
969	return res;	633	return 0;
970	}	634	}
971		635
972	/* read a full directory */	636	static MGVTBL mmap_vtbl = {
973	static void scandir_ (aio_req req, worker *self)	637	0, 0, 0, 0, mmap_free
974	{	638	};
975	DIR *dirp;
976	union
977	{
978	struct dirent d;
979	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
980	} *u;
981	struct dirent *entp;
982	char *name, *names;
983	int memlen = 4096;
984	int memofs = 0;
985	int res = 0;
986	int errorno;
987
988	LOCK (wrklock);
989	self->dirp = dirp = opendir (req->dataptr);
990	self->dbuf = u = malloc (sizeof (*u));
991	req->data2ptr = names = malloc (memlen);
992	UNLOCK (wrklock);
993
994	if (dirp && u && names)
995	for (;;)
996	{
997	errno = 0;
998	readdir_r (dirp, &u->d, &entp);
999
1000	if (!entp)
1001	break;
1002
1003	name = entp->d_name;
1004
1005	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1006	{
1007	int len = strlen (name) + 1;
1008
1009	res++;
1010
1011	while (memofs + len > memlen)
1012	{
1013	memlen *= 2;
1014	LOCK (wrklock);
1015	req->data2ptr = names = realloc (names, memlen);
1016	UNLOCK (wrklock);
1017
1018	if (!names)
1019	break;
1020	}
1021
1022	memcpy (names + memofs, name, len);
1023	memofs += len;
1024	}
1025	}
1026
1027	if (errno)
1028	res = -1;
1029
1030	req->result = res;
1031	}
1032		639
1033	/*****************************************************************************/	640	/*****************************************************************************/
1034		641
1035	static void *aio_proc (void *thr_arg)	642	static SV *
		643	get_cb (SV *cb_sv)
1036	{	644	{
1037	aio_req req;	645	SvGETMAGIC (cb_sv);
1038	struct timespec ts;	646	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1039	worker *self = (worker *)thr_arg;
1040
1041	/* try to distribute timeouts somewhat evenly */
1042	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1043	* (1000000000UL / 1024UL);
1044
1045	for (;;)
1046	{
1047	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1048
1049	LOCK (reqlock);
1050
1051	for (;;)
1052	{
1053	self->req = req = reqq_shift (&req_queue);
1054
1055	if (req)
1056	break;
1057
1058	++idle;
1059
1060	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1061	== ETIMEDOUT)
1062	{
1063	if (idle > max_idle)
1064	{
1065	--idle;
1066	UNLOCK (reqlock);
1067	LOCK (wrklock);
1068	--started;
1069	UNLOCK (wrklock);
1070	goto quit;
1071	}
1072
1073	/* we are allowed to idle, so do so without any timeout */
1074	pthread_cond_wait (&reqwait, &reqlock);
1075	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1076	}
1077
1078	--idle;
1079	}
1080
1081	--nready;
1082
1083	UNLOCK (reqlock);
1084
1085	errno = 0; /* strictly unnecessary */
1086
1087	if (!(req->flags & FLAG_CANCELLED))
1088	switch (req->type)
1089	{
1090	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1091	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1092
1093	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1094	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1095
1096	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1097	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1098	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1099
1100	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1101	case REQ_CLOSE: req->result = close (req->fd); break;
1102	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1103	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1104	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1105	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1106	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1107	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1108
1109	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1110	case REQ_FSYNC: req->result = fsync (req->fd); break;
1111	case REQ_READDIR: scandir_ (req, self); break;
1112
1113	case REQ_BUSY:
1114	{
1115	struct timeval tv;
1116
1117	tv.tv_sec = req->fd;
1118	tv.tv_usec = req->fd2;
1119
1120	req->result = select (0, 0, 0, 0, &tv);
1121	}
1122
1123	case REQ_GROUP:
1124	case REQ_NOP:
1125	break;
1126
1127	case REQ_QUIT:
1128	goto quit;
1129
1130	default:
1131	req->result = ENOSYS;
1132	break;
1133	}
1134
1135	req->errorno = errno;
1136
1137	LOCK (reslock);
1138
1139	++npending;
1140
1141	if (!reqq_push (&res_queue, req))
1142	/* write a dummy byte to the pipe so fh becomes ready */
1143	write (respipe [1], &respipe, 1);
1144
1145	self->req = 0;
1146	worker_clear (self);
1147
1148	UNLOCK (reslock);
1149	}
1150
1151	quit:
1152	LOCK (wrklock);
1153	worker_free (self);
1154	UNLOCK (wrklock);
1155
1156	return 0;
1157	}
1158
1159	/*****************************************************************************/
1160
1161	static void atfork_prepare (void)
1162	{
1163	LOCK (wrklock);
1164	LOCK (reqlock);
1165	LOCK (reslock);
1166	#if !HAVE_PREADWRITE
1167	LOCK (preadwritelock);
1168	#endif
1169	#if !HAVE_READDIR_R
1170	LOCK (readdirlock);
1171	#endif
1172	}
1173
1174	static void atfork_parent (void)
1175	{
1176	#if !HAVE_READDIR_R
1177	UNLOCK (readdirlock);
1178	#endif
1179	#if !HAVE_PREADWRITE
1180	UNLOCK (preadwritelock);
1181	#endif
1182	UNLOCK (reslock);
1183	UNLOCK (reqlock);
1184	UNLOCK (wrklock);
1185	}
1186
1187	static void atfork_child (void)
1188	{
1189	aio_req prv;
1190
1191	while (prv = reqq_shift (&req_queue))
1192	req_free (prv);
1193
1194	while (prv = reqq_shift (&res_queue))
1195	req_free (prv);
1196
1197	while (wrk_first.next != &wrk_first)
1198	{
1199	worker *wrk = wrk_first.next;
1200
1201	if (wrk->req)
1202	req_free (wrk->req);
1203
1204	worker_clear (wrk);
1205	worker_free (wrk);
1206	}
1207
1208	started = 0;
1209	idle = 0;
1210	nreqs = 0;
1211	nready = 0;
1212	npending = 0;
1213
1214	close (respipe [0]);
1215	close (respipe [1]);
1216	create_pipe ();
1217
1218	atfork_parent ();
1219	}	647	}
1220		648
1221	#define dREQ \	649	#define dREQ \
		650	SV *cb_cv; \
1222	aio_req req; \	651	aio_req req; \
1223	int req_pri = next_pri; \	652	int req_pri = next_pri; \
1224	next_pri = DEFAULT_PRI + PRI_BIAS; \	653	next_pri = EIO_PRI_DEFAULT; \
1225	\	654	\
1226	if (SvOK (callback) && !SvROK (callback)) \	655	cb_cv = get_cb (callback); \
1227	croak ("callback must be undef or of reference type"); \
1228	\	656	\
1229	Newz (0, req, 1, aio_cb); \	657	Newz (0, req, 1, eio_req); \
1230	if (!req) \	658	if (!req) \
1231	croak ("out of memory during aio_req allocation"); \	659	croak ("out of memory during eio_req allocation"); \
1232	\	660	\
1233	req->callback = newSVsv (callback); \	661	req->callback = SvREFCNT_inc (cb_cv); \
1234	req->pri = req_pri	662	req->pri = req_pri
1235		663
1236	#define REQ_SEND \	664	#define REQ_SEND \
		665	PUTBACK; \
1237	req_send (req); \	666	req_submit (req); \
		667	SPAGAIN; \
1238	\	668	\
1239	if (GIMME_V != G_VOID) \	669	if (GIMME_V != G_VOID) \
1240	XPUSHs (req_sv (req, AIO_REQ_KLASS));	670	XPUSHs (req_sv (req, aio_req_stash));
1241		671
1242	MODULE = IO::AIO PACKAGE = IO::AIO	672	MODULE = IO::AIO PACKAGE = IO::AIO
1243		673
1244	PROTOTYPES: ENABLE	674	PROTOTYPES: ENABLE
1245		675
1246	BOOT:	676	BOOT:
1247	{	677	{
		678	static const struct {
		679	const char *name;
		680	IV iv;
		681	} *civ, const_iv[] = {
		682	# define const_niv(name, value) { # name, (IV) value },
		683	# define const_iv(name) { # name, (IV) name },
		684	# define const_eio(name) { # name, (IV) EIO_ ## name },
		685	const_iv (EXDEV)
		686	const_iv (ENOSYS)
		687	const_iv (O_RDONLY)
		688	const_iv (O_WRONLY)
		689	const_iv (O_RDWR)
		690	const_iv (O_CREAT)
		691	const_iv (O_TRUNC)
		692	const_iv (O_EXCL)
		693	const_iv (O_APPEND)
		694	#ifndef _WIN32
		695	const_iv (S_IFIFO)
		696	#endif
		697	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		698	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		699	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		700	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		701	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		702	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		703
		704	const_iv (ST_RDONLY)
		705	const_iv (ST_NOSUID)
		706	const_iv (ST_NODEV)
		707	const_iv (ST_NOEXEC)
		708	const_iv (ST_SYNCHRONOUS)
		709	const_iv (ST_MANDLOCK)
		710	const_iv (ST_WRITE)
		711	const_iv (ST_APPEND)
		712	const_iv (ST_IMMUTABLE)
		713	const_iv (ST_NOATIME)
		714	const_iv (ST_NODIRATIME)
		715	const_iv (ST_RELATIME)
		716
		717	const_iv (PROT_EXEC)
		718	const_iv (PROT_NONE)
		719	const_iv (PROT_READ)
		720	const_iv (PROT_WRITE)
		721
		722	/*const_iv (MAP_FIXED)*/
		723	const_iv (MAP_PRIVATE)
		724	const_iv (MAP_SHARED)
		725	const_iv (MAP_ANONYMOUS)
		726
		727	/* linuxish */
		728	const_iv (MAP_HUGETLB)
		729	const_iv (MAP_LOCKED)
		730	const_iv (MAP_NORESERVE)
		731	const_iv (MAP_POPULATE)
		732	const_iv (MAP_NONBLOCK)
		733
		734	const_iv (MCL_FUTURE)
		735	const_iv (MCL_CURRENT)
		736
		737	const_eio (MS_ASYNC)
		738	const_eio (MS_INVALIDATE)
		739	const_eio (MS_SYNC)
		740
		741	const_eio (MT_MODIFY)
		742
		743	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		744	const_eio (SYNC_FILE_RANGE_WRITE)
		745	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		746
		747	const_eio (READDIR_DENTS)
		748	const_eio (READDIR_DIRS_FIRST)
		749	const_eio (READDIR_STAT_ORDER)
		750	const_eio (READDIR_FOUND_UNKNOWN)
		751
		752	const_eio (DT_UNKNOWN)
		753	const_eio (DT_FIFO)
		754	const_eio (DT_CHR)
		755	const_eio (DT_DIR)
		756	const_eio (DT_BLK)
		757	const_eio (DT_REG)
		758	const_eio (DT_LNK)
		759	const_eio (DT_SOCK)
		760	const_eio (DT_WHT)
		761	};
		762
1248	HV *stash = gv_stashpv ("IO::AIO", 1);	763	aio_stash = gv_stashpv ("IO::AIO" , 1);
		764	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		765	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1249		766
1250	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	767	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1251	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	768	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1252	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1253	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1254	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1255	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1256		769
		770	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		771
1257	create_pipe ();	772	create_respipe ();
1258	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	773
		774	if (eio_init (want_poll, done_poll) < 0)
		775	croak ("IO::AIO: unable to initialise eio library");
		776
		777	/* atfork child called in fifo order, so before eio's handler */
		778	X_THREAD_ATFORK (0, 0, atfork_child);
1259	}	779	}
1260		780
1261	void	781	void
1262	max_poll_reqs (int nreqs)	782	max_poll_reqs (int nreqs)
1263	PROTOTYPE: $	783	PROTOTYPE: $
1264	CODE:	784	CODE:
1265	max_poll_reqs = nreqs;	785	eio_set_max_poll_reqs (nreqs);
1266		786
1267	void	787	void
1268	max_poll_time (double nseconds)	788	max_poll_time (double nseconds)
1269	PROTOTYPE: $	789	PROTOTYPE: $
1270	CODE:	790	CODE:
1271	max_poll_time = nseconds * AIO_TICKS;	791	eio_set_max_poll_time (nseconds);
1272		792
1273	void	793	void
1274	min_parallel (int nthreads)	794	min_parallel (int nthreads)
1275	PROTOTYPE: $	795	PROTOTYPE: $
		796	CODE:
		797	eio_set_min_parallel (nthreads);
1276		798
1277	void	799	void
1278	max_parallel (int nthreads)	800	max_parallel (int nthreads)
1279	PROTOTYPE: $	801	PROTOTYPE: $
		802	CODE:
		803	eio_set_max_parallel (nthreads);
1280		804
1281	void	805	void
1282	max_idle (int nthreads)	806	max_idle (int nthreads)
1283	PROTOTYPE: $	807	PROTOTYPE: $
1284	CODE:	808	CODE:
1285	set_max_idle (nthreads);	809	eio_set_max_idle (nthreads);
1286		810
1287	int	811	void
1288	max_outstanding (int maxreqs)	812	max_outstanding (int maxreqs)
1289	PROTOTYPE: $	813	PROTOTYPE: $
1290	CODE:	814	CODE:
1291	RETVAL = max_outstanding;
1292	max_outstanding = maxreqs;	815	max_outstanding = maxreqs;
1293	OUTPUT:
1294	RETVAL
1295		816
1296	void	817	void
1297	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	818	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1298	SV * pathname
1299	int flags
1300	int mode
1301	SV * callback
1302	PROTOTYPE: $$$;$	819	PROTOTYPE: $$$;$
1303	PPCODE:	820	PPCODE:
1304	{	821	{
1305	dREQ;	822	dREQ;
1306		823
1307	req->type = REQ_OPEN;	824	req->type = EIO_OPEN;
1308	req->data = newSVsv (pathname);	825	req->sv1 = newSVsv (pathname);
1309	req->dataptr = SvPVbyte_nolen (req->data);	826	req->ptr1 = SvPVbyte_nolen (req->sv1);
1310	req->fd = flags;	827	req->int1 = flags;
1311	req->mode = mode;	828	req->int2 = mode;
1312		829
1313	REQ_SEND;	830	REQ_SEND;
1314	}	831	}
1315		832
1316	void	833	void
1317	aio_close (fh,callback=&PL_sv_undef)	834	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1318	SV * fh
1319	SV * callback
1320	PROTOTYPE: $;$	835	PROTOTYPE: $;$
1321	ALIAS:	836	ALIAS:
1322	aio_close = REQ_CLOSE
1323	aio_fsync = REQ_FSYNC	837	aio_fsync = EIO_FSYNC
1324	aio_fdatasync = REQ_FDATASYNC	838	aio_fdatasync = EIO_FDATASYNC
1325	PPCODE:	839	PPCODE:
1326	{	840	{
		841	int fd = s_fileno_croak (fh, 0);
1327	dREQ;	842	dREQ;
1328		843
1329	req->type = ix;	844	req->type = ix;
1330	req->fh = newSVsv (fh);	845	req->sv1 = newSVsv (fh);
1331	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	846	req->int1 = fd;
1332		847
1333	REQ_SEND (req);	848	REQ_SEND (req);
1334	}	849	}
1335		850
1336	void	851	void
		852	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		853	PROTOTYPE: $$$$;$
		854	PPCODE:
		855	{
		856	int fd = s_fileno_croak (fh, 0);
		857	dREQ;
		858
		859	req->type = EIO_SYNC_FILE_RANGE;
		860	req->sv1 = newSVsv (fh);
		861	req->int1 = fd;
		862	req->offs = offset;
		863	req->size = nbytes;
		864	req->int2 = flags;
		865
		866	REQ_SEND (req);
		867	}
		868
		869	void
		870	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		871	PROTOTYPE: $;$
		872	PPCODE:
		873	{
		874	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		875	int fd = s_fileno_croak (fh, 0);
		876	dREQ;
		877
		878	if (close_pipe < 0)
		879	{
		880	int pipefd [2];
		881
		882	if (pipe (pipefd) < 0
		883	|| close (pipefd [1]) < 0
		884	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		885	abort (); /*D*/
		886
		887	close_pipe = pipefd [0];
		888	}
		889
		890	req->type = EIO_DUP2;
		891	req->int1 = close_pipe;
		892	req->sv2 = newSVsv (fh);
		893	req->int2 = fd;
		894
		895	REQ_SEND (req);
		896	}
		897
		898	void
1337	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	899	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1338	SV * fh
1339	UV offset
1340	UV length
1341	SV * data
1342	UV dataoffset
1343	SV * callback
1344	ALIAS:	900	ALIAS:
1345	aio_read = REQ_READ	901	aio_read = EIO_READ
1346	aio_write = REQ_WRITE	902	aio_write = EIO_WRITE
1347	PROTOTYPE: $$$$$;$	903	PROTOTYPE: $$$$$;$
1348	PPCODE:	904	PPCODE:
1349	{	905	{
1350	aio_req req;
1351	STRLEN svlen;	906	STRLEN svlen;
		907	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1352	char *svptr = SvPVbyte (data, svlen);	908	char *svptr = SvPVbyte (data, svlen);
1353		909	UV len = SvUV (length);
1354	SvUPGRADE (data, SVt_PV);
1355	SvPOK_on (data);
1356		910
1357	if (dataoffset < 0)	911	if (dataoffset < 0)
1358	dataoffset += svlen;	912	dataoffset += svlen;
1359		913
1360	if (dataoffset < 0 || dataoffset > svlen)	914	if (dataoffset < 0 || dataoffset > svlen)
1361	croak ("data offset outside of string");	915	croak ("dataoffset outside of data scalar");
1362		916
1363	if (ix == REQ_WRITE)	917	if (ix == EIO_WRITE)
1364	{	918	{
1365	/* write: check length and adjust. */	919	/* write: check length and adjust. */
1366	if (length < 0 || length + dataoffset > svlen)	920	if (!SvOK (length) || len + dataoffset > svlen)
1367	length = svlen - dataoffset;	921	len = svlen - dataoffset;
1368	}	922	}
1369	else	923	else
1370	{	924	{
1371	/* read: grow scalar as necessary */	925	/* read: check type and grow scalar as necessary */
		926	SvUPGRADE (data, SVt_PV);
1372	svptr = SvGROW (data, length + dataoffset);	927	svptr = SvGROW (data, len + dataoffset + 1);
1373	}	928	}
1374
1375	if (length < 0)
1376	croak ("length must not be negative");
1377		929
1378	{	930	{
1379	dREQ;	931	dREQ;
1380		932
1381	req->type = ix;	933	req->type = ix;
1382	req->fh = newSVsv (fh);	934	req->sv1 = newSVsv (fh);
1383	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	935	req->int1 = fd;
1384	: IoOFP (sv_2io (fh)));	936	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1385	req->offset = offset;	937	req->size = len;
1386	req->length = length;
1387	req->data = SvREFCNT_inc (data);	938	req->sv2 = SvREFCNT_inc (data);
1388	req->dataptr = (char *)svptr + dataoffset;	939	req->ptr2 = (char *)svptr + dataoffset;
		940	req->stroffset = dataoffset;
1389		941
1390	if (!SvREADONLY (data))	942	if (!SvREADONLY (data))
1391	{	943	{
1392	SvREADONLY_on (data);	944	SvREADONLY_on (data);
1393	req->data2ptr = (void *)data;	945	req->flags |= FLAG_SV2_RO_OFF;
1394	}	946	}
1395		947
1396	REQ_SEND;	948	REQ_SEND;
1397	}	949	}
1398	}	950	}
1399		951
1400	void	952	void
		953	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		954	PROTOTYPE: $$;$
		955	PPCODE:
		956	{
		957	SV *data;
		958	dREQ;
		959
		960	req->type = EIO_READLINK;
		961	req->sv1 = newSVsv (path);
		962	req->ptr1 = SvPVbyte_nolen (req->sv1);
		963
		964	REQ_SEND;
		965	}
		966
		967	void
1401	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	968	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1402	SV * out_fh
1403	SV * in_fh
1404	UV in_offset
1405	UV length
1406	SV * callback
1407	PROTOTYPE: $$$$;$	969	PROTOTYPE: $$$$;$
1408	PPCODE:	970	PPCODE:
1409	{	971	{
		972	int ifd = s_fileno_croak (in_fh , 0);
		973	int ofd = s_fileno_croak (out_fh, 1);
1410	dREQ;	974	dREQ;
1411		975
1412	req->type = REQ_SENDFILE;	976	req->type = EIO_SENDFILE;
1413	req->fh = newSVsv (out_fh);	977	req->sv1 = newSVsv (out_fh);
1414	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	978	req->int1 = ofd;
1415	req->fh2 = newSVsv (in_fh);	979	req->sv2 = newSVsv (in_fh);
1416	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	980	req->int2 = ifd;
1417	req->offset = in_offset;	981	req->offs = in_offset;
1418	req->length = length;	982	req->size = length;
1419		983
1420	REQ_SEND;	984	REQ_SEND;
1421	}	985	}
1422		986
1423	void	987	void
1424	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	988	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1425	SV * fh
1426	UV offset
1427	IV length
1428	SV * callback
1429	PROTOTYPE: $$$;$	989	PROTOTYPE: $$$;$
1430	PPCODE:	990	PPCODE:
1431	{	991	{
		992	int fd = s_fileno_croak (fh, 0);
1432	dREQ;	993	dREQ;
1433		994
1434	req->type = REQ_READAHEAD;	995	req->type = EIO_READAHEAD;
1435	req->fh = newSVsv (fh);	996	req->sv1 = newSVsv (fh);
1436	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	997	req->int1 = fd;
1437	req->offset = offset;	998	req->offs = offset;
1438	req->length = length;	999	req->size = length;
1439		1000
1440	REQ_SEND;	1001	REQ_SEND;
1441	}	1002	}
1442		1003
1443	void	1004	void
1444	aio_stat (fh_or_path,callback=&PL_sv_undef)	1005	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1445	SV * fh_or_path
1446	SV * callback
1447	ALIAS:	1006	ALIAS:
1448	aio_stat = REQ_STAT	1007	aio_stat = EIO_STAT
1449	aio_lstat = REQ_LSTAT	1008	aio_lstat = EIO_LSTAT
		1009	aio_statvfs = EIO_STATVFS
1450	PPCODE:	1010	PPCODE:
1451	{	1011	{
1452	dREQ;	1012	dREQ;
1453		1013
1454	New (0, req->statdata, 1, Stat_t);	1014	req->sv1 = newSVsv (fh_or_path);
1455	if (!req->statdata)
1456	{
1457	req_free (req);
1458	croak ("out of memory during aio_req->statdata allocation");
1459	}
1460		1015
1461	if (SvPOK (fh_or_path))	1016	if (SvPOK (req->sv1))
1462	{	1017	{
1463	req->type = ix;	1018	req->type = ix;
1464	req->data = newSVsv (fh_or_path);
1465	req->dataptr = SvPVbyte_nolen (req->data);	1019	req->ptr1 = SvPVbyte_nolen (req->sv1);
1466	}	1020	}
1467	else	1021	else
1468	{	1022	{
1469	req->type = REQ_FSTAT;	1023	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1470	req->fh = newSVsv (fh_or_path);
1471	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1024	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1472	}	1025	}
1473		1026
1474	REQ_SEND;	1027	REQ_SEND;
1475	}	1028	}
1476		1029
1477	void	1030	void
		1031	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1032	PPCODE:
		1033	{
		1034	dREQ;
		1035
		1036	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1037	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1038	req->sv1 = newSVsv (fh_or_path);
		1039
		1040	if (SvPOK (req->sv1))
		1041	{
		1042	req->type = EIO_UTIME;
		1043	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1044	}
		1045	else
		1046	{
		1047	req->type = EIO_FUTIME;
		1048	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1049	}
		1050
		1051	REQ_SEND;
		1052	}
		1053
		1054	void
		1055	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1056	PPCODE:
		1057	{
		1058	dREQ;
		1059
		1060	req->sv1 = newSVsv (fh_or_path);
		1061	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1062
		1063	if (SvPOK (req->sv1))
		1064	{
		1065	req->type = EIO_TRUNCATE;
		1066	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1067	}
		1068	else
		1069	{
		1070	req->type = EIO_FTRUNCATE;
		1071	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1072	}
		1073
		1074	REQ_SEND;
		1075	}
		1076
		1077	void
		1078	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1079	ALIAS:
		1080	aio_chmod = EIO_CHMOD
		1081	aio_mkdir = EIO_MKDIR
		1082	PPCODE:
		1083	{
		1084	dREQ;
		1085
		1086	req->int2 = mode;
		1087	req->sv1 = newSVsv (fh_or_path);
		1088
		1089	if (SvPOK (req->sv1))
		1090	{
		1091	req->type = ix;
		1092	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1093	}
		1094	else
		1095	{
		1096	req->type = EIO_FCHMOD;
		1097	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1098	}
		1099
		1100	REQ_SEND;
		1101	}
		1102
		1103	void
		1104	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1105	PPCODE:
		1106	{
		1107	dREQ;
		1108
		1109	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1110	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1111	req->sv1 = newSVsv (fh_or_path);
		1112
		1113	if (SvPOK (req->sv1))
		1114	{
		1115	req->type = EIO_CHOWN;
		1116	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1117	}
		1118	else
		1119	{
		1120	req->type = EIO_FCHOWN;
		1121	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1122	}
		1123
		1124	REQ_SEND;
		1125	}
		1126
		1127	void
		1128	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1129	PPCODE:
		1130	{
		1131	dREQ;
		1132
		1133	req->type = EIO_READDIR;
		1134	req->sv1 = newSVsv (pathname);
		1135	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1136	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1137
		1138	if (flags & EIO_READDIR_DENTS)
		1139	req->int1 |= EIO_READDIR_CUSTOM2;
		1140
		1141	REQ_SEND;
		1142	}
		1143
		1144	void
1478	aio_unlink (pathname,callback=&PL_sv_undef)	1145	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1479	SV * pathname
1480	SV * callback
1481	ALIAS:	1146	ALIAS:
1482	aio_unlink = REQ_UNLINK	1147	aio_unlink = EIO_UNLINK
1483	aio_rmdir = REQ_RMDIR	1148	aio_rmdir = EIO_RMDIR
1484	aio_readdir = REQ_READDIR	1149	aio_readdir = EIO_READDIR
1485	PPCODE:	1150	PPCODE:
1486	{	1151	{
1487	dREQ;	1152	dREQ;
1488		1153
1489	req->type = ix;	1154	req->type = ix;
1490	req->data = newSVsv (pathname);	1155	req->sv1 = newSVsv (pathname);
1491	req->dataptr = SvPVbyte_nolen (req->data);	1156	req->ptr1 = SvPVbyte_nolen (req->sv1);
1492		1157
1493	REQ_SEND;	1158	REQ_SEND;
1494	}	1159	}
1495		1160
1496	void	1161	void
1497	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1162	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1498	SV * oldpath
1499	SV * newpath
1500	SV * callback
1501	ALIAS:	1163	ALIAS:
1502	aio_link = REQ_LINK	1164	aio_link = EIO_LINK
1503	aio_symlink = REQ_SYMLINK	1165	aio_symlink = EIO_SYMLINK
1504	aio_rename = REQ_RENAME	1166	aio_rename = EIO_RENAME
1505	PPCODE:	1167	PPCODE:
1506	{	1168	{
1507	dREQ;	1169	dREQ;
1508		1170
1509	req->type = ix;	1171	req->type = ix;
1510	req->fh = newSVsv (oldpath);	1172	req->sv1 = newSVsv (oldpath);
1511	req->data2ptr = SvPVbyte_nolen (req->fh);	1173	req->ptr1 = SvPVbyte_nolen (req->sv1);
1512	req->data = newSVsv (newpath);	1174	req->sv2 = newSVsv (newpath);
1513	req->dataptr = SvPVbyte_nolen (req->data);	1175	req->ptr2 = SvPVbyte_nolen (req->sv2);
1514		1176
1515	REQ_SEND;	1177	REQ_SEND;
1516	}	1178	}
1517		1179
1518	void	1180	void
1519	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1181	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1520	SV * pathname
1521	SV * callback
1522	UV mode
1523	UV dev
1524	PPCODE:	1182	PPCODE:
1525	{	1183	{
1526	dREQ;	1184	dREQ;
1527		1185
1528	req->type = REQ_MKNOD;	1186	req->type = EIO_MKNOD;
1529	req->data = newSVsv (pathname);	1187	req->sv1 = newSVsv (pathname);
1530	req->dataptr = SvPVbyte_nolen (req->data);	1188	req->ptr1 = SvPVbyte_nolen (req->sv1);
1531	req->mode = (mode_t)mode;	1189	req->int2 = (mode_t)mode;
1532	req->offset = dev;	1190	req->offs = dev;
1533		1191
1534	REQ_SEND;	1192	REQ_SEND;
1535	}	1193	}
1536		1194
1537	void	1195	void
		1196	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1197	ALIAS:
		1198	aio_mtouch = EIO_MTOUCH
		1199	aio_msync = EIO_MSYNC
		1200	PROTOTYPE: $$$$;$
		1201	PPCODE:
		1202	{
		1203	STRLEN svlen;
		1204	UV len = SvUV (length);
		1205	char *svptr = SvPVbyte (data, svlen);
		1206
		1207	if (offset < 0)
		1208	offset += svlen;
		1209
		1210	if (offset < 0 || offset > svlen)
		1211	croak ("offset outside of scalar");
		1212
		1213	if (!SvOK (length) || len + offset > svlen)
		1214	len = svlen - offset;
		1215
		1216	{
		1217	dREQ;
		1218
		1219	req->type = ix;
		1220	req->size = len;
		1221	req->sv2 = SvREFCNT_inc (data);
		1222	req->ptr2 = (char *)svptr + offset;
		1223	req->int1 = flags;
		1224
		1225	REQ_SEND;
		1226	}
		1227	}
		1228
		1229	void
1538	aio_busy (delay,callback=&PL_sv_undef)	1230	aio_busy (double delay, SV *callback=&PL_sv_undef)
1539	double delay
1540	SV * callback
1541	PPCODE:	1231	PPCODE:
1542	{	1232	{
1543	dREQ;	1233	dREQ;
1544		1234
1545	req->type = REQ_BUSY;	1235	req->type = EIO_BUSY;
1546	req->fd = delay < 0. ? 0 : delay;	1236	req->nv1 = delay < 0. ? 0. : delay;
1547	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1548		1237
1549	REQ_SEND;	1238	REQ_SEND;
1550	}	1239	}
1551		1240
1552	void	1241	void
1553	aio_group (callback=&PL_sv_undef)	1242	aio_group (SV *callback=&PL_sv_undef)
1554	SV * callback
1555	PROTOTYPE: ;$	1243	PROTOTYPE: ;$
1556	PPCODE:	1244	PPCODE:
1557	{	1245	{
1558	dREQ;	1246	dREQ;
1559		1247
1560	req->type = REQ_GROUP;	1248	req->type = EIO_GROUP;
		1249
1561	req_send (req);	1250	req_submit (req);
1562
1563	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1251	XPUSHs (req_sv (req, aio_grp_stash));
1564	}	1252	}
1565		1253
1566	void	1254	void
1567	aio_nop (callback=&PL_sv_undef)	1255	aio_nop (SV *callback=&PL_sv_undef)
1568	SV * callback	1256	ALIAS:
		1257	aio_nop = EIO_NOP
		1258	aio_sync = EIO_SYNC
1569	PPCODE:	1259	PPCODE:
1570	{	1260	{
1571	dREQ;	1261	dREQ;
1572		1262
1573	req->type = REQ_NOP;	1263	req->type = ix;
1574		1264
1575	REQ_SEND;	1265	REQ_SEND;
1576	}	1266	}
1577		1267
1578	int	1268	int
1579	aioreq_pri (int pri = 0)	1269	aioreq_pri (int pri = 0)
1580	PROTOTYPE: ;$	1270	PROTOTYPE: ;$
1581	CODE:	1271	CODE:
1582	RETVAL = next_pri - PRI_BIAS;	1272	RETVAL = next_pri;
1583	if (items > 0)	1273	if (items > 0)
1584	{	1274	{
1585	if (pri < PRI_MIN) pri = PRI_MIN;	1275	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1586	if (pri > PRI_MAX) pri = PRI_MAX;	1276	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1587	next_pri = pri + PRI_BIAS;	1277	next_pri = pri;
1588	}	1278	}
1589	OUTPUT:	1279	OUTPUT:
1590	RETVAL	1280	RETVAL
1591		1281
1592	void	1282	void
1593	aioreq_nice (int nice = 0)	1283	aioreq_nice (int nice = 0)
1594	CODE:	1284	CODE:
1595	nice = next_pri - nice;	1285	nice = next_pri - nice;
1596	if (nice < PRI_MIN) nice = PRI_MIN;	1286	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1597	if (nice > PRI_MAX) nice = PRI_MAX;	1287	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1598	next_pri = nice + PRI_BIAS;	1288	next_pri = nice;
1599		1289
1600	void	1290	void
1601	flush ()	1291	flush ()
1602	PROTOTYPE:	1292	PROTOTYPE:
1603	CODE:	1293	CODE:
1604	while (nreqs)	1294	while (eio_nreqs ())
1605	{	1295	{
1606	poll_wait ();	1296	poll_wait ();
1607	poll_cb (0);	1297	poll_cb ();
1608	}	1298	}
1609		1299
1610	void	1300	int
1611	poll()	1301	poll()
1612	PROTOTYPE:	1302	PROTOTYPE:
1613	CODE:	1303	CODE:
1614	if (nreqs)
1615	{
1616	poll_wait ();	1304	poll_wait ();
1617	poll_cb (0);	1305	RETVAL = poll_cb ();
1618	}	1306	OUTPUT:
		1307	RETVAL
1619		1308
1620	int	1309	int
1621	poll_fileno()	1310	poll_fileno()
1622	PROTOTYPE:	1311	PROTOTYPE:
1623	CODE:	1312	CODE:
1624	RETVAL = respipe [0];	1313	RETVAL = s_epipe_fd (&respipe);
1625	OUTPUT:	1314	OUTPUT:
1626	RETVAL	1315	RETVAL
1627		1316
1628	int	1317	int
1629	poll_cb(...)	1318	poll_cb(...)
…		…
1635		1324
1636	void	1325	void
1637	poll_wait()	1326	poll_wait()
1638	PROTOTYPE:	1327	PROTOTYPE:
1639	CODE:	1328	CODE:
1640	if (nreqs)
1641	poll_wait ();	1329	poll_wait ();
1642		1330
1643	int	1331	int
1644	nreqs()	1332	nreqs()
1645	PROTOTYPE:	1333	PROTOTYPE:
1646	CODE:	1334	CODE:
1647	RETVAL = nreqs;	1335	RETVAL = eio_nreqs ();
1648	OUTPUT:	1336	OUTPUT:
1649	RETVAL	1337	RETVAL
1650		1338
1651	int	1339	int
1652	nready()	1340	nready()
1653	PROTOTYPE:	1341	PROTOTYPE:
1654	CODE:	1342	CODE:
1655	RETVAL = get_nready ();	1343	RETVAL = eio_nready ();
1656	OUTPUT:	1344	OUTPUT:
1657	RETVAL	1345	RETVAL
1658		1346
1659	int	1347	int
1660	npending()	1348	npending()
1661	PROTOTYPE:	1349	PROTOTYPE:
1662	CODE:	1350	CODE:
1663	RETVAL = get_npending ();	1351	RETVAL = eio_npending ();
1664	OUTPUT:	1352	OUTPUT:
1665	RETVAL	1353	RETVAL
1666		1354
1667	int	1355	int
1668	nthreads()	1356	nthreads()
1669	PROTOTYPE:	1357	PROTOTYPE:
1670	CODE:	1358	CODE:
1671	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1359	RETVAL = eio_nthreads ();
1672	RETVAL = started;
1673	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1674	OUTPUT:	1360	OUTPUT:
1675	RETVAL	1361	RETVAL
1676		1362
		1363	int
		1364	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1365	PROTOTYPE: $$$$
		1366	CODE:
		1367	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1368	RETVAL = posix_fadvise (fh, offset, length, advice);
		1369	#else
		1370	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1371	#endif
		1372	OUTPUT:
		1373	RETVAL
		1374
		1375	ssize_t
		1376	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1377	PROTOTYPE: $$$$
		1378	CODE:
		1379	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1380	OUTPUT:
		1381	RETVAL
		1382
		1383	void
		1384	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1385	PROTOTYPE: $$$$$;$
		1386	PPCODE:
		1387	sv_unmagic (scalar, MMAP_MAGIC);
		1388	{
		1389	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1390	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1391	if (addr == (void *)-1)
		1392	XSRETURN_NO;
		1393
		1394	sv_force_normal (scalar);
		1395
		1396	/* we store the length in mg_obj, as namlen is I32 :/ */
		1397	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1398	->mg_obj = (SV *)length;
		1399
		1400	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1401
		1402	if (!(prot & PROT_WRITE))
		1403	SvREADONLY_on (scalar);
		1404
		1405	if (SvLEN (scalar))
		1406	Safefree (SvPVX (scalar));
		1407
		1408	SvPVX (scalar) = (char *)addr;
		1409	SvCUR_set (scalar, length);
		1410	SvLEN_set (scalar, 0);
		1411	SvPOK_only (scalar);
		1412
		1413	XSRETURN_YES;
		1414	}
		1415
		1416	void
		1417	munmap (SV *scalar)
		1418	PROTOTYPE: $
		1419	CODE:
		1420	sv_unmagic (scalar, MMAP_MAGIC);
		1421
		1422	int
		1423	mlockall (int flags)
		1424	PROTOTYPE: $
		1425	CODE:
		1426	#if _POSIX_MEMLOCK
		1427	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1428	extern int mallopt (int, int);
		1429	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1430	#endif
		1431	mlockall (flags);
		1432	#else
		1433	RETVAL = -1;
		1434	errno = ENOSYS;
		1435	#endif
		1436	OUTPUT:
		1437	RETVAL
		1438
		1439	int
		1440	munlockall ()
		1441	PROTOTYPE:
		1442	CODE:
		1443	#if _POSIX_MEMLOCK
		1444	munlockall ();
		1445	#else
		1446	RETVAL = -1;
		1447	errno = ENOSYS;
		1448	#endif
		1449	OUTPUT:
		1450	RETVAL
		1451
		1452	void _on_next_submit (SV *cb)
		1453	CODE:
		1454	SvREFCNT_dec (on_next_submit);
		1455	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1456
1677	PROTOTYPES: DISABLE	1457	PROTOTYPES: DISABLE
1678		1458
1679	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1459	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1680		1460
1681	void	1461	void
1682	cancel (aio_req_ornot req)	1462	cancel (aio_req_ornot req)
1683	CODE:	1463	CODE:
1684	req_cancel (req);	1464	eio_cancel (req);
1685		1465
1686	void	1466	void
1687	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1467	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1688	CODE:	1468	PPCODE:
		1469	{
		1470	if (GIMME_V != G_VOID)
		1471	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1472
		1473	if (items > 1)
		1474	{
		1475	SV *cb_cv =get_cb (callback);
		1476
1689	SvREFCNT_dec (req->callback);	1477	SvREFCNT_dec (req->callback);
1690	req->callback = newSVsv (callback);	1478	req->callback = SvREFCNT_inc (cb_cv);
		1479	}
		1480	}
1691		1481
1692	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1482	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1693		1483
1694	void	1484	void
1695	add (aio_req grp, ...)	1485	add (aio_req grp, ...)
1696	PPCODE:	1486	PPCODE:
1697	{	1487	{
1698	int i;	1488	int i;
1699	aio_req req;
1700		1489
1701	if (grp->fd == 2)	1490	if (grp->int1 == 2)
1702	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1491	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1703		1492
1704	for (i = 1; i < items; ++i )	1493	for (i = 1; i < items; ++i )
1705	{	1494	{
		1495	aio_req req;
		1496
1706	if (GIMME_V != G_VOID)	1497	if (GIMME_V != G_VOID)
1707	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1498	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1708		1499
1709	req = SvAIO_REQ (ST (i));	1500	req = SvAIO_REQ (ST (i));
1710		1501
1711	if (req)	1502	if (req)
1712	{	1503	eio_grp_add (grp, req);
1713	++grp->length;
1714	req->grp = grp;
1715
1716	req->grp_prev = 0;
1717	req->grp_next = grp->grp_first;
1718
1719	if (grp->grp_first)
1720	grp->grp_first->grp_prev = req;
1721
1722	grp->grp_first = req;
1723	}
1724	}	1504	}
1725	}	1505	}
1726		1506
1727	void	1507	void
1728	cancel_subs (aio_req_ornot req)	1508	cancel_subs (aio_req_ornot req)
…		…
1737	AV *av;	1517	AV *av;
1738		1518
1739	grp->errorno = errno;	1519	grp->errorno = errno;
1740		1520
1741	av = newAV ();	1521	av = newAV ();
		1522	av_extend (av, items - 1);
1742		1523
1743	for (i = 1; i < items; ++i )	1524	for (i = 1; i < items; ++i )
1744	av_push (av, newSVsv (ST (i)));	1525	av_push (av, newSVsv (ST (i)));
1745		1526
1746	SvREFCNT_dec (grp->data);	1527	SvREFCNT_dec (grp->sv1);
1747	grp->data = (SV *)av;	1528	grp->sv1 = (SV *)av;
1748	}	1529	}
1749		1530
1750	void	1531	void
1751	errno (aio_req grp, int errorno = errno)	1532	errno (aio_req grp, int errorno = errno)
1752	CODE:	1533	CODE:
1753	grp->errorno = errorno;	1534	grp->errorno = errorno;
1754		1535
1755	void	1536	void
1756	limit (aio_req grp, int limit)	1537	limit (aio_req grp, int limit)
1757	CODE:	1538	CODE:
1758	grp->fd2 = limit;	1539	eio_grp_limit (grp, limit);
1759	aio_grp_feed (grp);
1760		1540
1761	void	1541	void
1762	feed (aio_req grp, SV *callback=&PL_sv_undef)	1542	feed (aio_req grp, SV *callback=&PL_sv_undef)
1763	CODE:	1543	CODE:
1764	{	1544	{
1765	SvREFCNT_dec (grp->fh2);	1545	SvREFCNT_dec (grp->sv2);
1766	grp->fh2 = newSVsv (callback);	1546	grp->sv2 = newSVsv (callback);
		1547	grp->feed = aio_grp_feed;
1767		1548
1768	if (grp->fd2 <= 0)	1549	if (grp->int2 <= 0)
1769	grp->fd2 = 2;	1550	grp->int2 = 2;
1770		1551
1771	aio_grp_feed (grp);	1552	eio_grp_limit (grp, grp->int2);
1772	}	1553	}
1773		1554

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