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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.98 by root, Wed May 9 06:45:12 2007 UTC vs.
Revision 1.164 by root, Tue May 4 21:14:01 2010 UTC

1	#include "xthread.h"	1	#include "libeio/xthread.h"
2		2
3	#include <errno.h>	3	#include <errno.h>
4		4
5	#include "EXTERN.h"	5	#include "EXTERN.h"
6	#include "perl.h"	6	#include "perl.h"
7	#include "XSUB.h"	7	#include "XSUB.h"
8		8
9	#include "autoconf/config.h"	9	#include "schmorp.h"
10		10
11	#include <stddef.h>	11	#include <stddef.h>
12	#include <stdlib.h>	12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	14	#include <sys/types.h>
17	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
18	#include <limits.h>	17	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	18	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	19	#include <sched.h>
23		20
24	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
25	# if __linux
26	# include <sys/sendfile.h>	22	# include <sys/mman.h>
27	# elif __freebsd	23	#endif
28	# 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
29	# include <sys/uio.h>	68	# include <sys/time.h>
30	# elif __hpux
31	# include <sys/socket.h>
32	# elif __solaris /* not yet */
33	# 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
34	# else	186	# else
35	# error sendfile support requested but not available	187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
36	# endif	188	# endif
37	#endif	189	#endif
38		190	#ifndef MAP_HUGETLB
39	/* number of seconds after which idle threads exit */	191	# define MAP_HUGETLB 0
40	#define IDLE_TIMEOUT 10
41
42	/* used for struct dirent, AIX doesn't provide it */
43	#ifndef NAME_MAX
44	# define NAME_MAX 4096
45	#endif	192	#endif
		193	#ifndef MAP_LOCKED
		194	# define MAP_LOCKED 0
		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
46		205
47	/* buffer size for various temporary buffers */	206	#ifndef PAGESIZE
48	#define AIO_BUFSIZE 65536	207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
49		209
50	#define dBUF \	210	static int req_invoke (eio_req *req);
51	char *aio_buf; \	211	#define EIO_FINISH(req) req_invoke (req)
52	LOCK (wrklock); \	212	static void req_destroy (eio_req *grp);
53	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	213	#define EIO_DESTROY(req) req_destroy (req)
54	UNLOCK (wrklock); \
55	if (!aio_buf) \
56	return -1;
57
58	typedef SV SV8; /* byte-sv, used for argument-checking */
59		214
60	enum {	215	enum {
61	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
62	REQ_OPEN, REQ_CLOSE,
63	REQ_READ, REQ_WRITE, REQ_READAHEAD,
64	REQ_SENDFILE,
65	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
66	REQ_FSYNC, REQ_FDATASYNC,
67	REQ_UNLINK, REQ_RMDIR, REQ_MKDIR, REQ_RENAME,
68	REQ_MKNOD, REQ_READDIR,
69	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
70	REQ_GROUP, REQ_NOP,
71	REQ_BUSY,
72	};	217	};
73		218
74	#define AIO_REQ_KLASS "IO::AIO::REQ"	219	#include "libeio/eio.c"
75	#define AIO_GRP_KLASS "IO::AIO::GRP"
76		220
77	typedef struct aio_cb
78	{
79	struct aio_cb *volatile next;
80
81	SV *callback, *fh;
82	SV *sv1, *sv2;
83	void *ptr1, *ptr2;
84	off_t offs;
85	size_t size;
86	ssize_t result;
87
88	STRLEN stroffset;
89	int type;
90	int int1, int2;
91	int errorno;
92	mode_t mode; /* open */
93
94	unsigned char flags;
95	unsigned char pri;
96
97	SV *self; /* the perl counterpart of this request, if any */
98	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
99	} aio_cb;
100
101	enum {
102	FLAG_CANCELLED = 0x01, /* request was cancelled */
103	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
104	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
105	};
106
107	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
108	typedef aio_cb *aio_req_ornot;	222	typedef eio_req *aio_req_ornot;
109		223
110	enum {	224	static SV *on_next_submit;
111	PRI_MIN = -4,	225	static int next_pri = EIO_PRI_DEFAULT;
112	PRI_MAX = 4,	226	static int max_outstanding;
113		227
114	DEFAULT_PRI = 0,	228	static s_epipe respipe;
115	PRI_BIAS = -PRI_MIN,
116	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
117	};
118		229
119	#define AIO_TICKS ((1000000 + 1023) >> 10)
120
121	static unsigned int max_poll_time = 0;
122	static unsigned int max_poll_reqs = 0;
123
124	/* calculcate time difference in ~1/AIO_TICKS of a second */
125	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
126	{
127	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
128	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
129	}
130
131	static thread_t main_tid;
132	static int main_sig;
133	static int block_sig_level;
134
135	void block_sig ()
136	{
137	sigset_t ss;
138
139	if (block_sig_level++)
140	return;
141
142	if (!main_sig)
143	return;
144
145	sigemptyset (&ss);
146	sigaddset (&ss, main_sig);
147	pthread_sigmask (SIG_BLOCK, &ss, 0);
148	}
149
150	void unblock_sig ()
151	{
152	sigset_t ss;
153
154	if (--block_sig_level)
155	return;
156
157	if (!main_sig)
158	return;
159
160	sigemptyset (&ss);
161	sigaddset (&ss, main_sig);
162	pthread_sigmask (SIG_UNBLOCK, &ss, 0);
163	}
164
165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
166
167	static unsigned int started, idle, wanted;
168
169	/* worker threads management */
170	static mutex_t wrklock = MUTEX_INIT;
171
172	typedef struct worker {
173	/* locked by wrklock */
174	struct worker *prev, *next;
175
176	thread_t tid;
177
178	/* locked by reslock, reqlock or wrklock */
179	aio_req req; /* currently processed request */
180	void *dbuf;
181	DIR *dirp;
182	} worker;
183
184	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
185
186	static void worker_clear (worker *wrk)
187	{
188	if (wrk->dirp)
189	{
190	closedir (wrk->dirp);
191	wrk->dirp = 0;
192	}
193
194	if (wrk->dbuf)
195	{
196	free (wrk->dbuf);
197	wrk->dbuf = 0;
198	}
199	}
200
201	static void worker_free (worker *wrk)
202	{
203	wrk->next->prev = wrk->prev;
204	wrk->prev->next = wrk->next;
205
206	free (wrk);
207	}
208
209	static volatile unsigned int nreqs, nready, npending;
210	static volatile unsigned int max_idle = 4;
211	static volatile unsigned int max_outstanding = 0xffffffff;
212	static int respipe [2];
213
214	static mutex_t reslock = MUTEX_INIT;
215	static mutex_t reqlock = MUTEX_INIT;
216	static cond_t reqwait = COND_INIT;
217
218	#if WORDACCESS_UNSAFE
219
220	static unsigned int get_nready ()
221	{
222	unsigned int retval;
223
224	LOCK (reqlock);
225	retval = nready;
226	UNLOCK (reqlock);
227
228	return retval;
229	}
230
231	static unsigned int get_npending ()
232	{
233	unsigned int retval;
234
235	LOCK (reslock);
236	retval = npending;
237	UNLOCK (reslock);
238
239	return retval;
240	}
241
242	static unsigned int get_nthreads ()
243	{
244	unsigned int retval;
245
246	LOCK (wrklock);
247	retval = started;
248	UNLOCK (wrklock);
249
250	return retval;
251	}
252
253	#else
254
255	# define get_nready() nready
256	# define get_npending() npending
257	# define get_nthreads() started
258
259	#endif
260
261	/*
262	* a somewhat faster data structure might be nice, but
263	* with 8 priorities this actually needs <20 insns
264	* per shift, the most expensive operation.
265	*/
266	typedef struct {
267	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
268	int size;
269	} reqq;
270
271	static reqq req_queue;
272	static reqq res_queue;
273
274	int reqq_push (reqq *q, aio_req req)
275	{
276	int pri = req->pri;
277	req->next = 0;
278
279	if (q->qe[pri])
280	{
281	q->qe[pri]->next = req;
282	q->qe[pri] = req;
283	}
284	else
285	q->qe[pri] = q->qs[pri] = req;
286
287	return q->size++;
288	}
289
290	aio_req reqq_shift (reqq *q)
291	{
292	int pri;
293
294	if (!q->size)
295	return 0;
296
297	--q->size;
298
299	for (pri = NUM_PRI; pri--; )
300	{
301	aio_req req = q->qs[pri];
302
303	if (req)
304	{
305	if (!(q->qs[pri] = req->next))
306	q->qe[pri] = 0;
307
308	return req;
309	}
310	}
311
312	abort ();
313	}
314
315	static int poll_cb ();
316	static int req_invoke (aio_req req);
317	static void req_free (aio_req req);	230	static void req_destroy (aio_req req);
318	static void req_cancel (aio_req req);	231	static void req_cancel (aio_req req);
319		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
320	/* must be called at most once */	245	/* must be called at most once */
321	static SV *req_sv (aio_req req, const char *klass)	246	static SV *req_sv (aio_req req, HV *stash)
322	{	247	{
323	if (!req->self)	248	if (!req->self)
324	{	249	{
325	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
326	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
327	}	252	}
328		253
329	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
330	}	255	}
331		256
332	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
333	{	258	{
334	MAGIC *mg;	259	MAGIC *mg;
335		260
336	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")))
337	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
338		266
339	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
340		268
341	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
342	}	270	}
343		271
344	static void aio_grp_feed (aio_req grp)	272	static void aio_grp_feed (aio_req grp)
345	{	273	{
346	block_sig ();	274	if (grp->sv2 && SvOK (grp->sv2))
347
348	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))
349	{	275	{
350	int old_len = grp->size;
351
352	if (grp->sv2 && SvOK (grp->sv2))
353	{
354	dSP;	276	dSP;
355		277
356	ENTER;	278	ENTER;
357	SAVETMPS;	279	SAVETMPS;
358	PUSHMARK (SP);	280	PUSHMARK (SP);
359	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	281	XPUSHs (req_sv (grp, aio_grp_stash));
360	PUTBACK;	282	PUTBACK;
361	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
362	SPAGAIN;	284	SPAGAIN;
363	FREETMPS;	285	FREETMPS;
364	LEAVE;	286	LEAVE;
365	}
366
367	/* stop if no progress has been made */
368	if (old_len == grp->size)
369	{
370	SvREFCNT_dec (grp->sv2);
371	grp->sv2 = 0;
372	break;
373	}
374	}	287	}
375
376	unblock_sig ();
377	}	288	}
378		289
379	static void aio_grp_dec (aio_req grp)	290	static void req_submit (eio_req *req)
380	{	291	{
381	--grp->size;	292	eio_submit (req);
382		293
383	/* call feeder, if applicable */	294	if (expect_false (on_next_submit))
384	aio_grp_feed (grp);
385
386	/* finish, if done */
387	if (!grp->size && grp->int1)
388	{	295	{
389	block_sig ();	296	dSP;
		297	SV *cb = sv_2mortal (on_next_submit);
390		298
391	if (!req_invoke (grp))	299	on_next_submit = 0;
392	{
393	req_free (grp);
394	unblock_sig ();
395	croak (0);
396	}
397		300
398	req_free (grp);	301	PUSHMARK (SP);
399	unblock_sig ();	302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
400	}	304	}
401	}	305	}
402		306
403	static int req_invoke (aio_req req)	307	static int req_invoke (eio_req *req)
404	{	308	{
405	dSP;	309	dSP;
406		310
407	if (req->flags & FLAG_SV1_RO_OFF)	311	if (req->flags & FLAG_SV2_RO_OFF)
408	SvREADONLY_off (req->sv1);	312	SvREADONLY_off (req->sv2);
409		313
410	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	314	if (!EIO_CANCELLED (req) && req->callback)
411	{	315	{
412	ENTER;	316	ENTER;
413	SAVETMPS;	317	SAVETMPS;
414	PUSHMARK (SP);	318	PUSHMARK (SP);
415	EXTEND (SP, 1);	319	EXTEND (SP, 1);
416		320
417	switch (req->type)	321	switch (req->type)
418	{	322	{
419	case REQ_READDIR:	323	case EIO_READDIR:
420	{	324	{
421	SV *rv = &PL_sv_undef;	325	SV *rv = &PL_sv_undef;
422		326
423	if (req->result >= 0)	327	if (req->result >= 0)
424	{	328	{
425	int i;	329	int i;
426	char *buf = req->ptr2;	330	char *names = (char *)req->ptr2;
		331	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
427	AV *av = newAV ();	332	AV *av = newAV ();
428		333
429	av_extend (av, req->result - 1);	334	av_extend (av, req->result - 1);
430		335
431	for (i = 0; i < req->result; ++i)	336	for (i = 0; i < req->result; ++i)
432	{	337	{
433	SV *sv = newSVpv (buf, 0);	338	if (req->int1 & EIO_READDIR_DENTS)
		339	{
		340	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
434		341
		342	if (req->int1 & EIO_READDIR_CUSTOM2)
		343	{
		344	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		345	AV *avent = newAV ();
		346
		347	av_extend (avent, 2);
		348
		349	if (!sv_type [ent->type])
		350	{
		351	sv_type [ent->type] = newSViv (ent->type);
		352	SvREADONLY_on (sv_type [ent->type]);
		353	}
		354
		355	av_store (avent, 0, namesv);
		356	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		357	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		358
		359	av_store (av, i, newRV_noinc ((SV *)avent));
		360	}
		361	else
435	av_store (av, i, sv);	362	av_store (av, i, namesv);
		363
		364	++ent;
		365	}
		366	else
		367	{
		368	SV *name = newSVpv (names, 0);
		369	av_store (av, i, name);
436	buf += SvCUR (sv) + 1;	370	names += SvCUR (name) + 1;
		371	}
437	}	372	}
438		373
439	rv = sv_2mortal (newRV_noinc ((SV *)av));	374	rv = sv_2mortal (newRV_noinc ((SV *)av));
440	}	375	}
441		376
442	PUSHs (rv);	377	PUSHs (rv);
		378
		379	if (req->int1 & EIO_READDIR_CUSTOM1)
		380	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
443	}	381	}
444	break;	382	break;
445		383
446	case REQ_OPEN:	384	case EIO_OPEN:
447	{	385	{
448	/* convert fd to fh */	386	/* convert fd to fh */
449	SV *fh;	387	SV *fh = &PL_sv_undef;
450		388
451	PUSHs (sv_2mortal (newSViv (req->result)));	389	if (req->result >= 0)
452	PUTBACK;	390	{
453	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	391	GV *gv = (GV *)sv_newmortal ();
454	SPAGAIN;	392	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		393	char sym [64];
		394	int symlen;
		395
		396	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		397	gv_init (gv, aio_stash, sym, symlen, 0);
455		398
456	fh = POPs;	399	symlen = snprintf (
457	PUSHMARK (SP);	400	sym,
		401	sizeof (sym),
		402	"%s&=%d",
		403	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		404	(int)req->result
		405	);
		406
		407	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		408	fh = (SV *)gv;
		409	}
		410
458	XPUSHs (fh);	411	PUSHs (fh);
459	}	412	}
460	break;	413	break;
461		414
		415	case EIO_STATVFS:
		416	case EIO_FSTATVFS:
		417	{
		418	SV *rv = &PL_sv_undef;
		419
		420	if (req->result >= 0)
		421	{
		422	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		423	HV *hv = newHV ();
		424
		425	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		426
		427	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		428	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		429	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		430	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		431	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		432	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		433	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		434	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		435	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		436	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		437	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		438	}
		439
		440	PUSHs (rv);
		441	}
		442
		443	break;
		444
462	case REQ_GROUP:	445	case EIO_GROUP:
463	req->int1 = 2; /* mark group as finished */	446	req->int1 = 2; /* mark group as finished */
464		447
465	if (req->sv1)	448	if (req->sv1)
466	{	449	{
467	int i;	450	int i;
…		…
471	for (i = 0; i <= AvFILL (av); ++i)	454	for (i = 0; i <= AvFILL (av); ++i)
472	PUSHs (*av_fetch (av, i, 0));	455	PUSHs (*av_fetch (av, i, 0));
473	}	456	}
474	break;	457	break;
475		458
476	case REQ_NOP:	459	case EIO_NOP:
477	case REQ_BUSY:	460	case EIO_BUSY:
478	break;	461	break;
479		462
480	case REQ_READLINK:	463	case EIO_READLINK:
481	if (req->result > 0)	464	if (req->result > 0)
482	{	465	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
483	SvCUR_set (req->sv1, req->result);
484	*SvEND (req->sv1) = 0;
485	PUSHs (req->sv1);
486	}
487	break;	466	break;
488		467
489	case REQ_STAT:	468	case EIO_STAT:
490	case REQ_LSTAT:	469	case EIO_LSTAT:
491	case REQ_FSTAT:	470	case EIO_FSTAT:
492	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	471	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
493	PL_laststatval = req->result;	472	PL_laststatval = req->result;
494	PL_statcache = *(Stat_t *)(req->ptr2);	473	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
495	PUSHs (sv_2mortal (newSViv (req->result)));	474	PUSHs (sv_2mortal (newSViv (req->result)));
496	break;	475	break;
497		476
498	case REQ_READ:	477	case EIO_READ:
		478	{
499	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	479	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
500	*SvEND (req->sv1) = 0;	480	*SvEND (req->sv2) = 0;
		481	SvPOK_only (req->sv2);
		482	SvSETMAGIC (req->sv2);
501	PUSHs (sv_2mortal (newSViv (req->result)));	483	PUSHs (sv_2mortal (newSViv (req->result)));
		484	}
502	break;	485	break;
		486
		487	case EIO_DUP2:
		488	if (req->result > 0)
		489	req->result = 0;
		490	/* FALLTHROUGH */
503		491
504	default:	492	default:
505	PUSHs (sv_2mortal (newSViv (req->result)));	493	PUSHs (sv_2mortal (newSViv (req->result)));
506	break;	494	break;
507	}	495	}
508		496
509	errno = req->errorno;	497	errno = req->errorno;
510		498
511	PUTBACK;	499	PUTBACK;
512	call_sv (req->callback, G_VOID | G_EVAL);	500	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
513	SPAGAIN;	501	SPAGAIN;
514		502
515	FREETMPS;	503	FREETMPS;
516	LEAVE;	504	LEAVE;
		505
		506	PUTBACK;
517	}	507	}
518		508
519	if (req->grp)
520	{
521	aio_req grp = req->grp;
522
523	/* unlink request */
524	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
525	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
526
527	if (grp->grp_first == req)
528	grp->grp_first = req->grp_next;
529
530	aio_grp_dec (grp);
531	}
532
533	return !SvTRUE (ERRSV);	509	return !!SvTRUE (ERRSV);
534	}	510	}
535		511
536	static void req_free (aio_req req)	512	static void req_destroy (aio_req req)
537	{	513	{
538	if (req->self)	514	if (req->self)
539	{	515	{
540	sv_unmagic (req->self, PERL_MAGIC_ext);	516	sv_unmagic (req->self, PERL_MAGIC_ext);
541	SvREFCNT_dec (req->self);	517	SvREFCNT_dec (req->self);
542	}	518	}
543		519
544	SvREFCNT_dec (req->fh);
545	SvREFCNT_dec (req->sv1);	520	SvREFCNT_dec (req->sv1);
546	SvREFCNT_dec (req->sv2);	521	SvREFCNT_dec (req->sv2);
547	SvREFCNT_dec (req->callback);	522	SvREFCNT_dec (req->callback);
548		523
549	if (req->flags & FLAG_PTR2_FREE)
550	free (req->ptr2);
551
552	Safefree (req);	524	Safefree (req);
553	}	525	}
554		526
555	static void req_cancel_subs (aio_req grp)	527	static void req_cancel_subs (aio_req grp)
556	{	528	{
557	aio_req sub;	529	aio_req sub;
558		530
559	if (grp->type != REQ_GROUP)	531	if (grp->type != EIO_GROUP)
560	return;	532	return;
561		533
562	SvREFCNT_dec (grp->sv2);	534	SvREFCNT_dec (grp->sv2);
563	grp->sv2 = 0;	535	grp->sv2 = 0;
564		536
565	for (sub = grp->grp_first; sub; sub = sub->grp_next)	537	eio_grp_cancel (grp);
566	req_cancel (sub);
567	}	538	}
568		539
569	static void req_cancel (aio_req req)	540	static void
		541	create_respipe (void)
570	{	542	{
571	req->flags |= FLAG_CANCELLED;	543	if (s_epipe_renew (&respipe))
572		544	croak ("IO::AIO: unable to initialize result pipe");
573	req_cancel_subs (req);
574	}	545	}
575		546
576	static void *aio_proc(void *arg);
577
578	static void start_thread (void)
579	{
580	worker *wrk = calloc (1, sizeof (worker));
581
582	if (!wrk)
583	croak ("unable to allocate worker thread data");
584
585	LOCK (wrklock);
586
587	if (thread_create (&wrk->tid, aio_proc, (void *)wrk))
588	{
589	wrk->prev = &wrk_first;
590	wrk->next = wrk_first.next;
591	wrk_first.next->prev = wrk;
592	wrk_first.next = wrk;
593	++started;
594	}
595	else
596	free (wrk);
597
598	UNLOCK (wrklock);
599	}
600
601	static void maybe_start_thread ()
602	{
603	if (get_nthreads () >= wanted)
604	return;
605
606	/* todo: maybe use idle here, but might be less exact */
607	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
608	return;
609
610	start_thread ();
611	}
612
613	static void req_send (aio_req req)
614	{
615	block_sig ();
616
617	++nreqs;
618
619	LOCK (reqlock);
620	++nready;
621	reqq_push (&req_queue, req);
622	COND_SIGNAL (reqwait);
623	UNLOCK (reqlock);
624
625	unblock_sig ();
626
627	maybe_start_thread ();
628	}
629
630	static void end_thread (void)
631	{
632	aio_req req;
633
634	Newz (0, req, 1, aio_cb);
635
636	req->type = REQ_QUIT;
637	req->pri = PRI_MAX + PRI_BIAS;
638
639	LOCK (reqlock);
640	reqq_push (&req_queue, req);
641	COND_SIGNAL (reqwait);
642	UNLOCK (reqlock);
643
644	LOCK (wrklock);
645	--started;
646	UNLOCK (wrklock);
647	}
648
649	static void set_max_idle (int nthreads)
650	{
651	if (WORDACCESS_UNSAFE) LOCK (reqlock);
652	max_idle = nthreads <= 0 ? 1 : nthreads;
653	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
654	}
655
656	static void min_parallel (int nthreads)
657	{
658	if (wanted < nthreads)
659	wanted = nthreads;
660	}
661
662	static void max_parallel (int nthreads)
663	{
664	if (wanted > nthreads)
665	wanted = nthreads;
666
667	while (started > wanted)
668	end_thread ();
669	}
670
671	static void poll_wait ()	547	static void poll_wait (void)
672	{	548	{
673	fd_set rfd;
674
675	while (nreqs)	549	while (eio_nreqs ())
676	{	550	{
677	int size;	551	int size;
678	if (WORDACCESS_UNSAFE) LOCK (reslock);	552
		553	X_LOCK (reslock);
679	size = res_queue.size;	554	size = res_queue.size;
680	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	555	X_UNLOCK (reslock);
681		556
682	if (size)	557	if (size)
683	return;	558	return;
684		559
685	maybe_start_thread ();	560	etp_maybe_start_thread ();
686		561
687	FD_ZERO(&rfd);	562	s_epipe_wait (&respipe);
688	FD_SET(respipe [0], &rfd);
689
690	select (respipe [0] + 1, &rfd, 0, 0, 0);
691	}	563	}
692	}	564	}
693		565
694	static int poll_cb ()	566	static int poll_cb (void)
695	{	567	{
696	dSP;
697	int count = 0;
698	int maxreqs = max_poll_reqs;
699	int do_croak = 0;
700	struct timeval tv_start, tv_now;
701	aio_req req;
702
703	if (max_poll_time)
704	gettimeofday (&tv_start, 0);
705
706	block_sig ();
707
708	for (;;)	568	for (;;)
709	{	569	{
710	for (;;)	570	int res = eio_poll ();
711	{
712	maybe_start_thread ();
713		571
714	LOCK (reslock);	572	if (res > 0)
715	req = reqq_shift (&res_queue);
716
717	if (req)
718	{
719	--npending;
720
721	if (!res_queue.size)
722	{
723	/* read any signals sent by the worker threads */
724	char buf [4];
725	while (read (respipe [0], buf, 4) == 4)
726	;
727	}
728	}
729
730	UNLOCK (reslock);
731
732	if (!req)
733	break;
734
735	--nreqs;
736
737	if (req->type == REQ_GROUP && req->size)
738	{
739	req->int1 = 1; /* mark request as delayed */
740	continue;
741	}
742	else
743	{
744	if (!req_invoke (req))
745	{
746	req_free (req);
747	unblock_sig ();
748	croak (0);	573	croak (0);
749	}
750		574
751	count++;	575	if (!max_outstanding || max_outstanding > eio_nreqs ())
752	}	576	return res;
753
754	req_free (req);
755
756	if (maxreqs && !--maxreqs)
757	break;
758
759	if (max_poll_time)
760	{
761	gettimeofday (&tv_now, 0);
762
763	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
764	break;
765	}
766	}
767
768	if (nreqs <= max_outstanding)
769	break;
770		577
771	poll_wait ();	578	poll_wait ();
772
773	++maxreqs;
774	}	579	}
775
776	unblock_sig ();
777	return count;
778	}	580	}
779		581
780	static void create_pipe ()	582	static void atfork_child (void)
781	{	583	{
782	if (pipe (respipe))	584	create_respipe ();
783	croak ("unable to initialize result pipe");
784
785	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
786	croak ("cannot set result pipe to nonblocking mode");
787
788	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
789	croak ("cannot set result pipe to nonblocking mode");
790	}	585	}
791		586
792	/*****************************************************************************/	587	/*****************************************************************************/
793	/* work around various missing functions */
794		588
795	#if !HAVE_PREADWRITE	589	#if !_POSIX_MAPPED_FILES
796	# define pread aio_pread	590	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
797	# define pwrite aio_pwrite	591	# define munmap(addr,length) (errno = ENOSYS, -1)
798
799	/*
800	* make our pread/pwrite safe against themselves, but not against
801	* normal read/write by using a mutex. slows down execution a lot,
802	* but that's your problem, not mine.
803	*/
804	static mutex_t preadwritelock = MUTEX_INIT;
805
806	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
807	{
808	ssize_t res;
809	off_t ooffset;
810
811	LOCK (preadwritelock);
812	ooffset = lseek (fd, 0, SEEK_CUR);
813	lseek (fd, offset, SEEK_SET);
814	res = read (fd, buf, count);
815	lseek (fd, ooffset, SEEK_SET);
816	UNLOCK (preadwritelock);
817
818	return res;
819	}
820
821	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
822	{
823	ssize_t res;
824	off_t ooffset;
825
826	LOCK (preadwritelock);
827	ooffset = lseek (fd, 0, SEEK_CUR);
828	lseek (fd, offset, SEEK_SET);
829	res = write (fd, buf, count);
830	lseek (fd, offset, SEEK_SET);
831	UNLOCK (preadwritelock);
832
833	return res;
834	}
835	#endif
836
837	#if !HAVE_FDATASYNC
838	# define fdatasync fsync
839	#endif
840
841	#if !HAVE_READAHEAD
842	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
843
844	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
845	{
846	dBUF;
847
848	while (count > 0)
849	{
850	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
851
852	pread (fd, aio_buf, len, offset);
853	offset += len;
854	count -= len;
855	}
856
857	errno = 0;
858	}
859
860	#endif
861
862	#if !HAVE_READDIR_R
863	# define readdir_r aio_readdir_r
864
865	static mutex_t readdirlock = MUTEX_INIT;
866
867	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
868	{
869	struct dirent *e;
870	int errorno;
871
872	LOCK (readdirlock);
873
874	e = readdir (dirp);
875	errorno = errno;
876
877	if (e)
878	{
879	*res = ent;
880	strcpy (ent->d_name, e->d_name);
881	}
882	else
883	*res = 0;
884
885	UNLOCK (readdirlock);
886
887	errno = errorno;
888	return e ? 0 : -1;
889	}
890	#endif
891
892	/* sendfile always needs emulation */
893	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
894	{
895	ssize_t res;
896
897	if (!count)
898	return 0;
899
900	#if HAVE_SENDFILE
901	# if __linux
902	res = sendfile (ofd, ifd, &offset, count);
903
904	# elif __freebsd
905	/*
906	* Of course, the freebsd sendfile is a dire hack with no thoughts
907	* wasted on making it similar to other I/O functions.
908	*/
909	{
910	off_t sbytes;
911	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
912
913	if (res < 0 && sbytes)
914	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
915	res = sbytes;
916	}
917
918	# elif __hpux
919	res = sendfile (ofd, ifd, offset, count, 0, 0);
920
921	# elif __solaris
922	{
923	struct sendfilevec vec;
924	size_t sbytes;
925
926	vec.sfv_fd = ifd;
927	vec.sfv_flag = 0;
928	vec.sfv_off = offset;
929	vec.sfv_len = count;
930
931	res = sendfilev (ofd, &vec, 1, &sbytes);
932
933	if (res < 0 && sbytes)
934	res = sbytes;
935	}
936
937	# endif	592	#endif
938	#else
939	res = -1;
940	errno = ENOSYS;
941	#endif
942		593
943	if (res < 0	594	#define MMAP_MAGIC PERL_MAGIC_ext
944	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
945	#if __solaris
946	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
947	#endif
948	)
949	)
950	{
951	/* emulate sendfile. this is a major pain in the ass */
952	dBUF;
953		595
954	res = 0;	596	static int
		597	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		598	{
		599	int old_errno = errno;
		600	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		601	errno = old_errno;
955		602
956	while (count)	603	mg->mg_obj = 0; /* just in case */
957	{
958	ssize_t cnt;
959
960	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
961		604
962	if (cnt <= 0)	605	SvREADONLY_off (sv);
963	{	606	SvCUR_set (sv, 0);
964	if (cnt && !res) res = -1;	607	SvLEN_set (sv, 0);
965	break;	608	SvPVX (sv) = 0;
966	}	609	SvOK_off (sv);
967		610
968	cnt = write (ofd, aio_buf, cnt);
969
970	if (cnt <= 0)
971	{
972	if (cnt && !res) res = -1;
973	break;
974	}
975
976	offset += cnt;
977	res += cnt;
978	count -= cnt;
979	}
980	}
981
982	return res;	611	return 0;
983	}	612	}
984		613
985	/* read a full directory */	614	static MGVTBL mmap_vtbl = {
986	static void scandir_ (aio_req req, worker *self)	615	0, 0, 0, 0, mmap_free
987	{	616	};
988	DIR *dirp;
989	union
990	{
991	struct dirent d;
992	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
993	} *u;
994	struct dirent *entp;
995	char *name, *names;
996	int memlen = 4096;
997	int memofs = 0;
998	int res = 0;
999	int errorno;
1000
1001	LOCK (wrklock);
1002	self->dirp = dirp = opendir (req->ptr1);
1003	self->dbuf = u = malloc (sizeof (*u));
1004	req->flags |= FLAG_PTR2_FREE;
1005	req->ptr2 = names = malloc (memlen);
1006	UNLOCK (wrklock);
1007
1008	if (dirp && u && names)
1009	for (;;)
1010	{
1011	errno = 0;
1012	readdir_r (dirp, &u->d, &entp);
1013
1014	if (!entp)
1015	break;
1016
1017	name = entp->d_name;
1018
1019	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1020	{
1021	int len = strlen (name) + 1;
1022
1023	res++;
1024
1025	while (memofs + len > memlen)
1026	{
1027	memlen *= 2;
1028	LOCK (wrklock);
1029	req->ptr2 = names = realloc (names, memlen);
1030	UNLOCK (wrklock);
1031
1032	if (!names)
1033	break;
1034	}
1035
1036	memcpy (names + memofs, name, len);
1037	memofs += len;
1038	}
1039	}
1040
1041	if (errno)
1042	res = -1;
1043
1044	req->result = res;
1045	}
1046		617
1047	/*****************************************************************************/	618	/*****************************************************************************/
1048		619
1049	static void *aio_proc (void *thr_arg)	620	static SV *
		621	get_cb (SV *cb_sv)
1050	{	622	{
1051	aio_req req;	623	SvGETMAGIC (cb_sv);
1052	struct timespec ts;	624	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1053	worker *self = (worker *)thr_arg;
1054
1055	/* try to distribute timeouts somewhat evenly */
1056	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1057	* (1000000000UL / 1024UL);
1058
1059	for (;;)
1060	{
1061	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1062
1063	LOCK (reqlock);
1064
1065	for (;;)
1066	{
1067	self->req = req = reqq_shift (&req_queue);
1068
1069	if (req)
1070	break;
1071
1072	++idle;
1073
1074	if (COND_TIMEDWAIT (reqwait, reqlock, ts)
1075	== ETIMEDOUT)
1076	{
1077	if (idle > max_idle)
1078	{
1079	--idle;
1080	UNLOCK (reqlock);
1081	LOCK (wrklock);
1082	--started;
1083	UNLOCK (wrklock);
1084	goto quit;
1085	}
1086
1087	/* we are allowed to idle, so do so without any timeout */
1088	COND_WAIT (reqwait, reqlock);
1089	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1090	}
1091
1092	--idle;
1093	}
1094
1095	--nready;
1096
1097	UNLOCK (reqlock);
1098
1099	errno = 0; /* strictly unnecessary */
1100
1101	if (!(req->flags & FLAG_CANCELLED))
1102	switch (req->type)
1103	{
1104	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1105	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1106
1107	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1108	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1109
1110	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1111	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1112	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1113
1114	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1115	case REQ_CLOSE: req->result = close (req->int1); break;
1116	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1117	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1118	case REQ_MKDIR: req->result = mkdir (req->ptr1, req->mode); break;
1119	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1120	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1121	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1122	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1123	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1124
1125	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1126	case REQ_FSYNC: req->result = fsync (req->int1); break;
1127	case REQ_READDIR: scandir_ (req, self); break;
1128
1129	case REQ_BUSY:
1130	{
1131	struct timeval tv;
1132
1133	tv.tv_sec = req->int1;
1134	tv.tv_usec = req->int2;
1135
1136	req->result = select (0, 0, 0, 0, &tv);
1137	}
1138
1139	case REQ_GROUP:
1140	case REQ_NOP:
1141	break;
1142
1143	case REQ_QUIT:
1144	goto quit;
1145
1146	default:
1147	req->result = ENOSYS;
1148	break;
1149	}
1150
1151	req->errorno = errno;
1152
1153	LOCK (reslock);
1154
1155	++npending;
1156
1157	if (!reqq_push (&res_queue, req))
1158	{
1159	/* write a dummy byte to the pipe so fh becomes ready */
1160	write (respipe [1], &respipe, 1);
1161
1162	/* optionally signal the main thread asynchronously */
1163	if (main_sig)
1164	pthread_kill (main_tid, main_sig);
1165	}
1166
1167	self->req = 0;
1168	worker_clear (self);
1169
1170	UNLOCK (reslock);
1171	}
1172
1173	quit:
1174	LOCK (wrklock);
1175	worker_free (self);
1176	UNLOCK (wrklock);
1177
1178	return 0;
1179	}
1180
1181	/*****************************************************************************/
1182
1183	static void atfork_prepare (void)
1184	{
1185	LOCK (wrklock);
1186	LOCK (reqlock);
1187	LOCK (reslock);
1188	#if !HAVE_PREADWRITE
1189	LOCK (preadwritelock);
1190	#endif
1191	#if !HAVE_READDIR_R
1192	LOCK (readdirlock);
1193	#endif
1194	}
1195
1196	static void atfork_parent (void)
1197	{
1198	#if !HAVE_READDIR_R
1199	UNLOCK (readdirlock);
1200	#endif
1201	#if !HAVE_PREADWRITE
1202	UNLOCK (preadwritelock);
1203	#endif
1204	UNLOCK (reslock);
1205	UNLOCK (reqlock);
1206	UNLOCK (wrklock);
1207	}
1208
1209	static void atfork_child (void)
1210	{
1211	aio_req prv;
1212
1213	while (prv = reqq_shift (&req_queue))
1214	req_free (prv);
1215
1216	while (prv = reqq_shift (&res_queue))
1217	req_free (prv);
1218
1219	while (wrk_first.next != &wrk_first)
1220	{
1221	worker *wrk = wrk_first.next;
1222
1223	if (wrk->req)
1224	req_free (wrk->req);
1225
1226	worker_clear (wrk);
1227	worker_free (wrk);
1228	}
1229
1230	started = 0;
1231	idle = 0;
1232	nreqs = 0;
1233	nready = 0;
1234	npending = 0;
1235
1236	close (respipe [0]);
1237	close (respipe [1]);
1238	create_pipe ();
1239
1240	atfork_parent ();
1241	}	625	}
1242		626
1243	#define dREQ \	627	#define dREQ \
		628	SV *cb_cv; \
1244	aio_req req; \	629	aio_req req; \
1245	int req_pri = next_pri; \	630	int req_pri = next_pri; \
1246	next_pri = DEFAULT_PRI + PRI_BIAS; \	631	next_pri = EIO_PRI_DEFAULT; \
1247	\	632	\
1248	if (SvOK (callback) && !SvROK (callback)) \	633	cb_cv = get_cb (callback); \
1249	croak ("callback must be undef or of reference type"); \
1250	\	634	\
1251	Newz (0, req, 1, aio_cb); \	635	Newz (0, req, 1, eio_req); \
1252	if (!req) \	636	if (!req) \
1253	croak ("out of memory during aio_req allocation"); \	637	croak ("out of memory during eio_req allocation"); \
1254	\	638	\
1255	req->callback = newSVsv (callback); \	639	req->callback = SvREFCNT_inc (cb_cv); \
1256	req->pri = req_pri	640	req->pri = req_pri
1257		641
1258	#define REQ_SEND \	642	#define REQ_SEND \
		643	PUTBACK; \
1259	req_send (req); \	644	req_submit (req); \
		645	SPAGAIN; \
1260	\	646	\
1261	if (GIMME_V != G_VOID) \	647	if (GIMME_V != G_VOID) \
1262	XPUSHs (req_sv (req, AIO_REQ_KLASS));	648	XPUSHs (req_sv (req, aio_req_stash));
1263		649
1264	MODULE = IO::AIO PACKAGE = IO::AIO	650	MODULE = IO::AIO PACKAGE = IO::AIO
1265		651
1266	PROTOTYPES: ENABLE	652	PROTOTYPES: ENABLE
1267		653
1268	BOOT:	654	BOOT:
1269	{	655	{
		656	static const struct {
		657	const char *name;
		658	IV iv;
		659	} *civ, const_iv[] = {
		660	# define const_niv(name, value) { # name, (IV) value },
		661	# define const_iv(name) { # name, (IV) name },
		662	# define const_eio(name) { # name, (IV) EIO_ ## name },
		663	const_iv (EXDEV)
		664	const_iv (ENOSYS)
		665	const_iv (O_RDONLY)
		666	const_iv (O_WRONLY)
		667	const_iv (O_RDWR)
		668	const_iv (O_CREAT)
		669	const_iv (O_TRUNC)
		670	const_iv (O_EXCL)
		671	const_iv (O_APPEND)
		672	#ifndef _WIN32
		673	const_iv (S_IFIFO)
		674	#endif
		675	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		676	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		677	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		678	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		679	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		680	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		681
		682	const_iv (ST_RDONLY)
		683	const_iv (ST_NOSUID)
		684	const_iv (ST_NODEV)
		685	const_iv (ST_NOEXEC)
		686	const_iv (ST_SYNCHRONOUS)
		687	const_iv (ST_MANDLOCK)
		688	const_iv (ST_WRITE)
		689	const_iv (ST_APPEND)
		690	const_iv (ST_IMMUTABLE)
		691	const_iv (ST_NOATIME)
		692	const_iv (ST_NODIRATIME)
		693	const_iv (ST_RELATIME)
		694
		695	const_iv (PROT_EXEC)
		696	const_iv (PROT_NONE)
		697	const_iv (PROT_READ)
		698	const_iv (PROT_WRITE)
		699
		700	/*const_iv (MAP_FIXED)*/
		701	const_iv (MAP_PRIVATE)
		702	const_iv (MAP_SHARED)
		703	const_iv (MAP_ANONYMOUS)
		704
		705	/* linuxish */
		706	const_iv (MAP_HUGETLB)
		707	const_iv (MAP_LOCKED)
		708	const_iv (MAP_NORESERVE)
		709	const_iv (MAP_POPULATE)
		710	const_iv (MAP_NONBLOCK)
		711
		712	const_iv (MCL_FUTURE)
		713	const_iv (MCL_CURRENT)
		714
		715	const_eio (MS_ASYNC)
		716	const_eio (MS_INVALIDATE)
		717	const_eio (MS_SYNC)
		718
		719	const_eio (MT_MODIFY)
		720
		721	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		722	const_eio (SYNC_FILE_RANGE_WRITE)
		723	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		724
		725	const_eio (READDIR_DENTS)
		726	const_eio (READDIR_DIRS_FIRST)
		727	const_eio (READDIR_STAT_ORDER)
		728	const_eio (READDIR_FOUND_UNKNOWN)
		729
		730	const_eio (DT_UNKNOWN)
		731	const_eio (DT_FIFO)
		732	const_eio (DT_CHR)
		733	const_eio (DT_DIR)
		734	const_eio (DT_BLK)
		735	const_eio (DT_REG)
		736	const_eio (DT_LNK)
		737	const_eio (DT_SOCK)
		738	const_eio (DT_WHT)
		739	};
		740
1270	HV *stash = gv_stashpv ("IO::AIO", 1);	741	aio_stash = gv_stashpv ("IO::AIO" , 1);
		742	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		743	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1271		744
1272	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	745	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1273	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	746	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1274	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1275	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1276	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1277	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1278	newCONSTSUB (stash, "SIGIO", newSViv (SIGIO));
1279		747
		748	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		749
1280	create_pipe ();	750	create_respipe ();
1281	ATFORK (atfork_prepare, atfork_parent, atfork_child);	751
		752	if (eio_init (want_poll, done_poll) < 0)
		753	croak ("IO::AIO: unable to initialise eio library");
		754
		755	/* atfork child called in fifo order, so before eio's handler */
		756	X_THREAD_ATFORK (0, 0, atfork_child);
1282	}	757	}
1283		758
1284	void	759	void
1285	max_poll_reqs (int nreqs)	760	max_poll_reqs (int nreqs)
1286	PROTOTYPE: $	761	PROTOTYPE: $
1287	CODE:	762	CODE:
1288	max_poll_reqs = nreqs;	763	eio_set_max_poll_reqs (nreqs);
1289		764
1290	void	765	void
1291	max_poll_time (double nseconds)	766	max_poll_time (double nseconds)
1292	PROTOTYPE: $	767	PROTOTYPE: $
1293	CODE:	768	CODE:
1294	max_poll_time = nseconds * AIO_TICKS;	769	eio_set_max_poll_time (nseconds);
1295		770
1296	void	771	void
1297	min_parallel (int nthreads)	772	min_parallel (int nthreads)
1298	PROTOTYPE: $	773	PROTOTYPE: $
		774	CODE:
		775	eio_set_min_parallel (nthreads);
1299		776
1300	void	777	void
1301	max_parallel (int nthreads)	778	max_parallel (int nthreads)
1302	PROTOTYPE: $	779	PROTOTYPE: $
		780	CODE:
		781	eio_set_max_parallel (nthreads);
1303		782
1304	void	783	void
1305	max_idle (int nthreads)	784	max_idle (int nthreads)
1306	PROTOTYPE: $	785	PROTOTYPE: $
1307	CODE:	786	CODE:
1308	set_max_idle (nthreads);	787	eio_set_max_idle (nthreads);
1309		788
1310	int	789	void
1311	max_outstanding (int maxreqs)	790	max_outstanding (int maxreqs)
1312	PROTOTYPE: $	791	PROTOTYPE: $
1313	CODE:	792	CODE:
1314	RETVAL = max_outstanding;
1315	max_outstanding = maxreqs;	793	max_outstanding = maxreqs;
1316	OUTPUT:
1317	RETVAL
1318		794
1319	void	795	void
1320	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	796	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1321	SV8 * pathname
1322	int flags
1323	int mode
1324	SV * callback
1325	PROTOTYPE: $$$;$	797	PROTOTYPE: $$$;$
1326	PPCODE:	798	PPCODE:
1327	{	799	{
1328	dREQ;	800	dREQ;
1329		801
1330	req->type = REQ_OPEN;	802	req->type = EIO_OPEN;
1331	req->sv1 = newSVsv (pathname);	803	req->sv1 = newSVsv (pathname);
1332	req->ptr1 = SvPVbyte_nolen (req->sv1);	804	req->ptr1 = SvPVbyte_nolen (req->sv1);
1333	req->int1 = flags;	805	req->int1 = flags;
1334	req->mode = mode;	806	req->int2 = mode;
1335		807
1336	REQ_SEND;	808	REQ_SEND;
1337	}	809	}
1338		810
1339	void	811	void
1340	aio_close (fh,callback=&PL_sv_undef)	812	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1341	SV * fh
1342	SV * callback
1343	PROTOTYPE: $;$	813	PROTOTYPE: $;$
1344	ALIAS:	814	ALIAS:
1345	aio_close = REQ_CLOSE
1346	aio_fsync = REQ_FSYNC	815	aio_fsync = EIO_FSYNC
1347	aio_fdatasync = REQ_FDATASYNC	816	aio_fdatasync = EIO_FDATASYNC
1348	PPCODE:	817	PPCODE:
1349	{	818	{
		819	int fd = s_fileno_croak (fh, 0);
1350	dREQ;	820	dREQ;
1351		821
1352	req->type = ix;	822	req->type = ix;
1353	req->fh = newSVsv (fh);	823	req->sv1 = newSVsv (fh);
1354	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	824	req->int1 = fd;
1355		825
1356	REQ_SEND (req);	826	REQ_SEND (req);
1357	}	827	}
1358		828
1359	void	829	void
		830	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		831	PROTOTYPE: $$$$;$
		832	PPCODE:
		833	{
		834	int fd = s_fileno_croak (fh, 0);
		835	dREQ;
		836
		837	req->type = EIO_SYNC_FILE_RANGE;
		838	req->sv1 = newSVsv (fh);
		839	req->int1 = fd;
		840	req->offs = offset;
		841	req->size = nbytes;
		842	req->int2 = flags;
		843
		844	REQ_SEND (req);
		845	}
		846
		847	void
		848	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		849	PROTOTYPE: $;$
		850	PPCODE:
		851	{
		852	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		853	int fd = s_fileno_croak (fh, 0);
		854	dREQ;
		855
		856	if (close_pipe < 0)
		857	{
		858	int pipefd [2];
		859
		860	if (pipe (pipefd) < 0
		861	|| close (pipefd [1]) < 0
		862	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		863	abort (); /*D*/
		864
		865	close_pipe = pipefd [0];
		866	}
		867
		868	req->type = EIO_DUP2;
		869	req->int1 = close_pipe;
		870	req->sv2 = newSVsv (fh);
		871	req->int2 = fd;
		872
		873	REQ_SEND (req);
		874	}
		875
		876	void
1360	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	877	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1361	SV * fh
1362	UV offset
1363	UV length
1364	SV8 * data
1365	UV dataoffset
1366	SV * callback
1367	ALIAS:	878	ALIAS:
1368	aio_read = REQ_READ	879	aio_read = EIO_READ
1369	aio_write = REQ_WRITE	880	aio_write = EIO_WRITE
1370	PROTOTYPE: $$$$$;$	881	PROTOTYPE: $$$$$;$
1371	PPCODE:	882	PPCODE:
1372	{	883	{
1373	STRLEN svlen;	884	STRLEN svlen;
		885	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1374	char *svptr = SvPVbyte (data, svlen);	886	char *svptr = SvPVbyte (data, svlen);
1375		887	UV len = SvUV (length);
1376	SvUPGRADE (data, SVt_PV);
1377	SvPOK_on (data);
1378		888
1379	if (dataoffset < 0)	889	if (dataoffset < 0)
1380	dataoffset += svlen;	890	dataoffset += svlen;
1381		891
1382	if (dataoffset < 0 || dataoffset > svlen)	892	if (dataoffset < 0 || dataoffset > svlen)
1383	croak ("data offset outside of string");	893	croak ("dataoffset outside of data scalar");
1384		894
1385	if (ix == REQ_WRITE)	895	if (ix == EIO_WRITE)
1386	{	896	{
1387	/* write: check length and adjust. */	897	/* write: check length and adjust. */
1388	if (length < 0 || length + dataoffset > svlen)	898	if (!SvOK (length) || len + dataoffset > svlen)
1389	length = svlen - dataoffset;	899	len = svlen - dataoffset;
1390	}	900	}
1391	else	901	else
1392	{	902	{
1393	/* read: grow scalar as necessary */	903	/* read: check type and grow scalar as necessary */
		904	SvUPGRADE (data, SVt_PV);
1394	svptr = SvGROW (data, length + dataoffset + 1);	905	svptr = SvGROW (data, len + dataoffset + 1);
1395	}	906	}
1396
1397	if (length < 0)
1398	croak ("length must not be negative");
1399		907
1400	{	908	{
1401	dREQ;	909	dREQ;
1402		910
1403	req->type = ix;	911	req->type = ix;
1404	req->fh = newSVsv (fh);	912	req->sv1 = newSVsv (fh);
1405	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	913	req->int1 = fd;
1406	: IoOFP (sv_2io (fh)));	914	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1407	req->offs = offset;
1408	req->size = length;	915	req->size = len;
1409	req->sv1 = SvREFCNT_inc (data);	916	req->sv2 = SvREFCNT_inc (data);
1410	req->ptr1 = (char *)svptr + dataoffset;	917	req->ptr2 = (char *)svptr + dataoffset;
1411	req->stroffset = dataoffset;	918	req->stroffset = dataoffset;
1412		919
1413	if (!SvREADONLY (data))	920	if (!SvREADONLY (data))
1414	{	921	{
1415	SvREADONLY_on (data);	922	SvREADONLY_on (data);
1416	req->flags |= FLAG_SV1_RO_OFF;	923	req->flags |= FLAG_SV2_RO_OFF;
1417	}	924	}
1418		925
1419	REQ_SEND;	926	REQ_SEND;
1420	}	927	}
1421	}	928	}
1422		929
1423	void	930	void
1424	aio_readlink (path,callback=&PL_sv_undef)	931	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1425	SV8 * path
1426	SV * callback
1427	PROTOTYPE: $$;$	932	PROTOTYPE: $$;$
1428	PPCODE:	933	PPCODE:
1429	{	934	{
1430	SV *data;	935	SV *data;
1431	dREQ;	936	dREQ;
1432		937
1433	data = newSV (NAME_MAX);
1434	SvPOK_on (data);
1435
1436	req->type = REQ_READLINK;	938	req->type = EIO_READLINK;
1437	req->fh = newSVsv (path);	939	req->sv1 = newSVsv (path);
1438	req->ptr2 = SvPVbyte_nolen (req->fh);	940	req->ptr1 = SvPVbyte_nolen (req->sv1);
1439	req->sv1 = data;
1440	req->ptr1 = SvPVbyte_nolen (data);
1441		941
1442	REQ_SEND;	942	REQ_SEND;
1443	}	943	}
1444		944
1445	void	945	void
1446	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	946	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1447	SV * out_fh
1448	SV * in_fh
1449	UV in_offset
1450	UV length
1451	SV * callback
1452	PROTOTYPE: $$$$;$	947	PROTOTYPE: $$$$;$
1453	PPCODE:	948	PPCODE:
1454	{	949	{
		950	int ifd = s_fileno_croak (in_fh , 0);
		951	int ofd = s_fileno_croak (out_fh, 1);
1455	dREQ;	952	dREQ;
1456		953
1457	req->type = REQ_SENDFILE;	954	req->type = EIO_SENDFILE;
1458	req->fh = newSVsv (out_fh);	955	req->sv1 = newSVsv (out_fh);
1459	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	956	req->int1 = ofd;
1460	req->sv2 = newSVsv (in_fh);	957	req->sv2 = newSVsv (in_fh);
1461	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	958	req->int2 = ifd;
1462	req->offs = in_offset;	959	req->offs = in_offset;
1463	req->size = length;	960	req->size = length;
1464		961
1465	REQ_SEND;	962	REQ_SEND;
1466	}	963	}
1467		964
1468	void	965	void
1469	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	966	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1470	SV * fh
1471	UV offset
1472	IV length
1473	SV * callback
1474	PROTOTYPE: $$$;$	967	PROTOTYPE: $$$;$
1475	PPCODE:	968	PPCODE:
1476	{	969	{
		970	int fd = s_fileno_croak (fh, 0);
1477	dREQ;	971	dREQ;
1478		972
1479	req->type = REQ_READAHEAD;	973	req->type = EIO_READAHEAD;
1480	req->fh = newSVsv (fh);	974	req->sv1 = newSVsv (fh);
1481	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	975	req->int1 = fd;
1482	req->offs = offset;	976	req->offs = offset;
1483	req->size = length;	977	req->size = length;
1484		978
1485	REQ_SEND;	979	REQ_SEND;
1486	}	980	}
1487		981
1488	void	982	void
1489	aio_stat (fh_or_path,callback=&PL_sv_undef)	983	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1490	SV8 * fh_or_path
1491	SV * callback
1492	ALIAS:	984	ALIAS:
1493	aio_stat = REQ_STAT	985	aio_stat = EIO_STAT
1494	aio_lstat = REQ_LSTAT	986	aio_lstat = EIO_LSTAT
		987	aio_statvfs = EIO_STATVFS
1495	PPCODE:	988	PPCODE:
1496	{	989	{
1497	dREQ;	990	dREQ;
1498		991
1499	req->ptr2 = malloc (sizeof (Stat_t));	992	req->sv1 = newSVsv (fh_or_path);
1500	if (!req->ptr2)
1501	{
1502	req_free (req);
1503	croak ("out of memory during aio_stat statdata allocation");
1504	}
1505		993
1506	req->flags |= FLAG_PTR2_FREE;	994	if (SvPOK (req->sv1))
1507
1508	if (SvPOK (fh_or_path))
1509	{	995	{
1510	req->type = ix;	996	req->type = ix;
1511	req->sv1 = newSVsv (fh_or_path);
1512	req->ptr1 = SvPVbyte_nolen (req->sv1);	997	req->ptr1 = SvPVbyte_nolen (req->sv1);
1513	}	998	}
1514	else	999	else
1515	{	1000	{
1516	req->type = REQ_FSTAT;	1001	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1517	req->fh = newSVsv (fh_or_path);
1518	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1002	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1519	}	1003	}
1520		1004
1521	REQ_SEND;	1005	REQ_SEND;
1522	}	1006	}
1523		1007
1524	void	1008	void
		1009	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1010	PPCODE:
		1011	{
		1012	dREQ;
		1013
		1014	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1015	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1016	req->sv1 = newSVsv (fh_or_path);
		1017
		1018	if (SvPOK (req->sv1))
		1019	{
		1020	req->type = EIO_UTIME;
		1021	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1022	}
		1023	else
		1024	{
		1025	req->type = EIO_FUTIME;
		1026	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1027	}
		1028
		1029	REQ_SEND;
		1030	}
		1031
		1032	void
		1033	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1034	PPCODE:
		1035	{
		1036	dREQ;
		1037
		1038	req->sv1 = newSVsv (fh_or_path);
		1039	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1040
		1041	if (SvPOK (req->sv1))
		1042	{
		1043	req->type = EIO_TRUNCATE;
		1044	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1045	}
		1046	else
		1047	{
		1048	req->type = EIO_FTRUNCATE;
		1049	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1050	}
		1051
		1052	REQ_SEND;
		1053	}
		1054
		1055	void
		1056	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1057	ALIAS:
		1058	aio_chmod = EIO_CHMOD
		1059	aio_mkdir = EIO_MKDIR
		1060	PPCODE:
		1061	{
		1062	dREQ;
		1063
		1064	req->int2 = mode;
		1065	req->sv1 = newSVsv (fh_or_path);
		1066
		1067	if (SvPOK (req->sv1))
		1068	{
		1069	req->type = ix;
		1070	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1071	}
		1072	else
		1073	{
		1074	req->type = EIO_FCHMOD;
		1075	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1076	}
		1077
		1078	REQ_SEND;
		1079	}
		1080
		1081	void
		1082	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1083	PPCODE:
		1084	{
		1085	dREQ;
		1086
		1087	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1088	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1089	req->sv1 = newSVsv (fh_or_path);
		1090
		1091	if (SvPOK (req->sv1))
		1092	{
		1093	req->type = EIO_CHOWN;
		1094	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1095	}
		1096	else
		1097	{
		1098	req->type = EIO_FCHOWN;
		1099	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1100	}
		1101
		1102	REQ_SEND;
		1103	}
		1104
		1105	void
		1106	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1107	PPCODE:
		1108	{
		1109	dREQ;
		1110
		1111	req->type = EIO_READDIR;
		1112	req->sv1 = newSVsv (pathname);
		1113	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1114	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1115
		1116	if (flags & EIO_READDIR_DENTS)
		1117	req->int1 |= EIO_READDIR_CUSTOM2;
		1118
		1119	REQ_SEND;
		1120	}
		1121
		1122	void
1525	aio_unlink (pathname,callback=&PL_sv_undef)	1123	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1526	SV8 * pathname
1527	SV * callback
1528	ALIAS:	1124	ALIAS:
1529	aio_unlink = REQ_UNLINK	1125	aio_unlink = EIO_UNLINK
1530	aio_rmdir = REQ_RMDIR	1126	aio_rmdir = EIO_RMDIR
1531	aio_readdir = REQ_READDIR	1127	aio_readdir = EIO_READDIR
1532	PPCODE:	1128	PPCODE:
1533	{	1129	{
1534	dREQ;	1130	dREQ;
1535		1131
1536	req->type = ix;	1132	req->type = ix;
…		…
1539		1135
1540	REQ_SEND;	1136	REQ_SEND;
1541	}	1137	}
1542		1138
1543	void	1139	void
1544	aio_mkdir (pathname,mode,callback=&PL_sv_undef)
1545	SV8 * pathname
1546	UV mode
1547	SV * callback
1548	PPCODE:
1549	{
1550	dREQ;
1551
1552	req->type = REQ_MKDIR;
1553	req->sv1 = newSVsv (pathname);
1554	req->ptr1 = SvPVbyte_nolen (req->sv1);
1555	req->mode = mode;
1556
1557	REQ_SEND;
1558	}
1559
1560	void
1561	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1140	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1562	SV8 * oldpath
1563	SV8 * newpath
1564	SV * callback
1565	ALIAS:	1141	ALIAS:
1566	aio_link = REQ_LINK	1142	aio_link = EIO_LINK
1567	aio_symlink = REQ_SYMLINK	1143	aio_symlink = EIO_SYMLINK
1568	aio_rename = REQ_RENAME	1144	aio_rename = EIO_RENAME
1569	PPCODE:	1145	PPCODE:
1570	{	1146	{
1571	dREQ;	1147	dREQ;
1572		1148
1573	req->type = ix;	1149	req->type = ix;
1574	req->fh = newSVsv (oldpath);	1150	req->sv1 = newSVsv (oldpath);
1575	req->ptr2 = SvPVbyte_nolen (req->fh);
1576	req->sv1 = newSVsv (newpath);
1577	req->ptr1 = SvPVbyte_nolen (req->sv1);	1151	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1152	req->sv2 = newSVsv (newpath);
		1153	req->ptr2 = SvPVbyte_nolen (req->sv2);
1578		1154
1579	REQ_SEND;	1155	REQ_SEND;
1580	}	1156	}
1581		1157
1582	void	1158	void
1583	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1159	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1584	SV8 * pathname
1585	UV mode
1586	UV dev
1587	SV * callback
1588	PPCODE:	1160	PPCODE:
1589	{	1161	{
1590	dREQ;	1162	dREQ;
1591		1163
1592	req->type = REQ_MKNOD;	1164	req->type = EIO_MKNOD;
1593	req->sv1 = newSVsv (pathname);	1165	req->sv1 = newSVsv (pathname);
1594	req->ptr1 = SvPVbyte_nolen (req->sv1);	1166	req->ptr1 = SvPVbyte_nolen (req->sv1);
1595	req->mode = (mode_t)mode;	1167	req->int2 = (mode_t)mode;
1596	req->offs = dev;	1168	req->offs = dev;
1597		1169
1598	REQ_SEND;	1170	REQ_SEND;
1599	}	1171	}
1600		1172
1601	void	1173	void
		1174	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1175	ALIAS:
		1176	aio_mtouch = EIO_MTOUCH
		1177	aio_msync = EIO_MSYNC
		1178	PROTOTYPE: $$$$;$
		1179	PPCODE:
		1180	{
		1181	STRLEN svlen;
		1182	UV len = SvUV (length);
		1183	char *svptr = SvPVbyte (data, svlen);
		1184
		1185	if (offset < 0)
		1186	offset += svlen;
		1187
		1188	if (offset < 0 || offset > svlen)
		1189	croak ("offset outside of scalar");
		1190
		1191	if (!SvOK (length) || len + offset > svlen)
		1192	len = svlen - offset;
		1193
		1194	{
		1195	dREQ;
		1196
		1197	req->type = ix;
		1198	req->size = len;
		1199	req->sv2 = SvREFCNT_inc (data);
		1200	req->ptr2 = (char *)svptr + offset;
		1201	req->int1 = flags;
		1202
		1203	REQ_SEND;
		1204	}
		1205	}
		1206
		1207	void
1602	aio_busy (delay,callback=&PL_sv_undef)	1208	aio_busy (double delay, SV *callback=&PL_sv_undef)
1603	double delay
1604	SV * callback
1605	PPCODE:	1209	PPCODE:
1606	{	1210	{
1607	dREQ;	1211	dREQ;
1608		1212
1609	req->type = REQ_BUSY;	1213	req->type = EIO_BUSY;
1610	req->int1 = delay < 0. ? 0 : delay;	1214	req->nv1 = delay < 0. ? 0. : delay;
1611	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1612		1215
1613	REQ_SEND;	1216	REQ_SEND;
1614	}	1217	}
1615		1218
1616	void	1219	void
1617	aio_group (callback=&PL_sv_undef)	1220	aio_group (SV *callback=&PL_sv_undef)
1618	SV * callback
1619	PROTOTYPE: ;$	1221	PROTOTYPE: ;$
1620	PPCODE:	1222	PPCODE:
1621	{	1223	{
1622	dREQ;	1224	dREQ;
1623		1225
1624	req->type = REQ_GROUP;	1226	req->type = EIO_GROUP;
1625		1227
1626	req_send (req);	1228	req_submit (req);
1627	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1229	XPUSHs (req_sv (req, aio_grp_stash));
1628	}	1230	}
1629		1231
1630	void	1232	void
1631	aio_nop (callback=&PL_sv_undef)	1233	aio_nop (SV *callback=&PL_sv_undef)
1632	SV * callback	1234	ALIAS:
		1235	aio_nop = EIO_NOP
		1236	aio_sync = EIO_SYNC
1633	PPCODE:	1237	PPCODE:
1634	{	1238	{
1635	dREQ;	1239	dREQ;
1636		1240
1637	req->type = REQ_NOP;	1241	req->type = ix;
1638		1242
1639	REQ_SEND;	1243	REQ_SEND;
1640	}	1244	}
1641		1245
1642	int	1246	int
1643	aioreq_pri (int pri = 0)	1247	aioreq_pri (int pri = 0)
1644	PROTOTYPE: ;$	1248	PROTOTYPE: ;$
1645	CODE:	1249	CODE:
1646	RETVAL = next_pri - PRI_BIAS;	1250	RETVAL = next_pri;
1647	if (items > 0)	1251	if (items > 0)
1648	{	1252	{
1649	if (pri < PRI_MIN) pri = PRI_MIN;	1253	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1650	if (pri > PRI_MAX) pri = PRI_MAX;	1254	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1651	next_pri = pri + PRI_BIAS;	1255	next_pri = pri;
1652	}	1256	}
1653	OUTPUT:	1257	OUTPUT:
1654	RETVAL	1258	RETVAL
1655		1259
1656	void	1260	void
1657	aioreq_nice (int nice = 0)	1261	aioreq_nice (int nice = 0)
1658	CODE:	1262	CODE:
1659	nice = next_pri - nice;	1263	nice = next_pri - nice;
1660	if (nice < PRI_MIN) nice = PRI_MIN;	1264	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1661	if (nice > PRI_MAX) nice = PRI_MAX;	1265	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1662	next_pri = nice + PRI_BIAS;	1266	next_pri = nice;
1663		1267
1664	void	1268	void
1665	flush ()	1269	flush ()
1666	PROTOTYPE:	1270	PROTOTYPE:
1667	CODE:	1271	CODE:
1668	while (nreqs)	1272	while (eio_nreqs ())
1669	{	1273	{
1670	poll_wait ();	1274	poll_wait ();
1671	poll_cb ();	1275	poll_cb ();
1672	}	1276	}
1673		1277
…		…
1682		1286
1683	int	1287	int
1684	poll_fileno()	1288	poll_fileno()
1685	PROTOTYPE:	1289	PROTOTYPE:
1686	CODE:	1290	CODE:
1687	RETVAL = respipe [0];	1291	RETVAL = s_epipe_fd (&respipe);
1688	OUTPUT:	1292	OUTPUT:
1689	RETVAL	1293	RETVAL
1690		1294
1691	int	1295	int
1692	poll_cb(...)	1296	poll_cb(...)
…		…
1700	poll_wait()	1304	poll_wait()
1701	PROTOTYPE:	1305	PROTOTYPE:
1702	CODE:	1306	CODE:
1703	poll_wait ();	1307	poll_wait ();
1704		1308
1705	void
1706	setsig (int signum = SIGIO)
1707	PROTOTYPE: ;$
1708	CODE:
1709	{
1710	if (block_sig_level)
1711	croak ("cannot call IO::AIO::setsig from within aio_block/callback");
1712
1713	LOCK (reslock);
1714	main_tid = pthread_self ();
1715	main_sig = signum;
1716	UNLOCK (reslock);
1717
1718	if (main_sig && npending)
1719	pthread_kill (main_tid, main_sig);
1720	}
1721
1722	void
1723	aio_block (SV *cb)
1724	PROTOTYPE: &
1725	PPCODE:
1726	{
1727	int count;
1728
1729	block_sig ();
1730	PUSHMARK (SP);
1731	PUTBACK;
1732	count = call_sv (cb, GIMME_V | G_NOARGS | G_EVAL);
1733	SPAGAIN;
1734	unblock_sig ();
1735
1736	if (SvTRUE (ERRSV))
1737	croak (0);
1738
1739	XSRETURN (count);
1740	}
1741
1742	int	1309	int
1743	nreqs()	1310	nreqs()
1744	PROTOTYPE:	1311	PROTOTYPE:
1745	CODE:	1312	CODE:
1746	RETVAL = nreqs;	1313	RETVAL = eio_nreqs ();
1747	OUTPUT:	1314	OUTPUT:
1748	RETVAL	1315	RETVAL
1749		1316
1750	int	1317	int
1751	nready()	1318	nready()
1752	PROTOTYPE:	1319	PROTOTYPE:
1753	CODE:	1320	CODE:
1754	RETVAL = get_nready ();	1321	RETVAL = eio_nready ();
1755	OUTPUT:	1322	OUTPUT:
1756	RETVAL	1323	RETVAL
1757		1324
1758	int	1325	int
1759	npending()	1326	npending()
1760	PROTOTYPE:	1327	PROTOTYPE:
1761	CODE:	1328	CODE:
1762	RETVAL = get_npending ();	1329	RETVAL = eio_npending ();
1763	OUTPUT:	1330	OUTPUT:
1764	RETVAL	1331	RETVAL
1765		1332
1766	int	1333	int
1767	nthreads()	1334	nthreads()
1768	PROTOTYPE:	1335	PROTOTYPE:
1769	CODE:	1336	CODE:
1770	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1337	RETVAL = eio_nthreads ();
1771	RETVAL = started;
1772	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1773	OUTPUT:	1338	OUTPUT:
1774	RETVAL	1339	RETVAL
1775		1340
		1341	int
		1342	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1343	PROTOTYPE: $$$$
		1344	CODE:
		1345	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1346	RETVAL = posix_fadvise (fh, offset, length, advice);
		1347	#else
		1348	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1349	#endif
		1350	OUTPUT:
		1351	RETVAL
		1352
		1353	ssize_t
		1354	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1355	PROTOTYPE: $$$$
		1356	CODE:
		1357	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1358	OUTPUT:
		1359	RETVAL
		1360
		1361	void
		1362	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1363	PROTOTYPE: $$$$$;$
		1364	PPCODE:
		1365	sv_unmagic (scalar, MMAP_MAGIC);
		1366	{
		1367	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1368	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1369	if (addr == (void *)-1)
		1370	XSRETURN_NO;
		1371
		1372	/* we store the length in mg_obj, as namlen is I32 :/ */
		1373	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1374	->mg_obj = (SV *)length;
		1375
		1376	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1377	if (!(prot & PROT_WRITE))
		1378	SvREADONLY_on (scalar);
		1379
		1380	SvPVX (scalar) = (char *)addr;
		1381	SvCUR_set (scalar, length);
		1382	SvLEN_set (scalar, 0);
		1383	SvPOK_only (scalar);
		1384
		1385	XSRETURN_YES;
		1386	}
		1387
		1388	void
		1389	munmap (SV *scalar)
		1390	PROTOTYPE: $
		1391	CODE:
		1392	sv_unmagic (scalar, MMAP_MAGIC);
		1393
		1394	int
		1395	mlockall (int flags)
		1396	PROTOTYPE: $
		1397	CODE:
		1398	#if _POSIX_MEMLOCK
		1399	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1400	extern int mallopt (int, int);
		1401	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1402	#endif
		1403	mlockall (flags);
		1404	#else
		1405	RETVAL = -1;
		1406	errno = ENOSYS;
		1407	#endif
		1408	OUTPUT:
		1409	RETVAL
		1410
		1411	int
		1412	munlockall ()
		1413	PROTOTYPE:
		1414	CODE:
		1415	#if _POSIX_MEMLOCK
		1416	munlockall ();
		1417	#else
		1418	RETVAL = -1;
		1419	errno = ENOSYS;
		1420	#endif
		1421	OUTPUT:
		1422	RETVAL
		1423
		1424	void _on_next_submit (SV *cb)
		1425	CODE:
		1426	SvREFCNT_dec (on_next_submit);
		1427	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1428
1776	PROTOTYPES: DISABLE	1429	PROTOTYPES: DISABLE
1777		1430
1778	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1431	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1779		1432
1780	void	1433	void
1781	cancel (aio_req_ornot req)	1434	cancel (aio_req_ornot req)
1782	CODE:	1435	CODE:
1783	req_cancel (req);	1436	eio_cancel (req);
1784		1437
1785	void	1438	void
1786	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1439	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1787	CODE:	1440	PPCODE:
		1441	{
		1442	if (GIMME_V != G_VOID)
		1443	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1444
		1445	if (items > 1)
		1446	{
		1447	SV *cb_cv =get_cb (callback);
		1448
1788	SvREFCNT_dec (req->callback);	1449	SvREFCNT_dec (req->callback);
1789	req->callback = newSVsv (callback);	1450	req->callback = SvREFCNT_inc (cb_cv);
		1451	}
		1452	}
1790		1453
1791	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1454	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1792		1455
1793	void	1456	void
1794	add (aio_req grp, ...)	1457	add (aio_req grp, ...)
1795	PPCODE:	1458	PPCODE:
1796	{	1459	{
1797	int i;	1460	int i;
1798	aio_req req;
1799
1800	if (main_sig && !block_sig_level)
1801	croak ("aio_group->add called outside aio_block/callback context while IO::AIO::setsig is in use");
1802		1461
1803	if (grp->int1 == 2)	1462	if (grp->int1 == 2)
1804	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1463	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1805		1464
1806	for (i = 1; i < items; ++i )	1465	for (i = 1; i < items; ++i )
1807	{	1466	{
		1467	aio_req req;
		1468
1808	if (GIMME_V != G_VOID)	1469	if (GIMME_V != G_VOID)
1809	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1470	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1810		1471
1811	req = SvAIO_REQ (ST (i));	1472	req = SvAIO_REQ (ST (i));
1812		1473
1813	if (req)	1474	if (req)
1814	{	1475	eio_grp_add (grp, req);
1815	++grp->size;
1816	req->grp = grp;
1817
1818	req->grp_prev = 0;
1819	req->grp_next = grp->grp_first;
1820
1821	if (grp->grp_first)
1822	grp->grp_first->grp_prev = req;
1823
1824	grp->grp_first = req;
1825	}
1826	}	1476	}
1827	}	1477	}
1828		1478
1829	void	1479	void
1830	cancel_subs (aio_req_ornot req)	1480	cancel_subs (aio_req_ornot req)
…		…
1839	AV *av;	1489	AV *av;
1840		1490
1841	grp->errorno = errno;	1491	grp->errorno = errno;
1842		1492
1843	av = newAV ();	1493	av = newAV ();
		1494	av_extend (av, items - 1);
1844		1495
1845	for (i = 1; i < items; ++i )	1496	for (i = 1; i < items; ++i )
1846	av_push (av, newSVsv (ST (i)));	1497	av_push (av, newSVsv (ST (i)));
1847		1498
1848	SvREFCNT_dec (grp->sv1);	1499	SvREFCNT_dec (grp->sv1);
…		…
1855	grp->errorno = errorno;	1506	grp->errorno = errorno;
1856		1507
1857	void	1508	void
1858	limit (aio_req grp, int limit)	1509	limit (aio_req grp, int limit)
1859	CODE:	1510	CODE:
1860	grp->int2 = limit;	1511	eio_grp_limit (grp, limit);
1861	aio_grp_feed (grp);
1862		1512
1863	void	1513	void
1864	feed (aio_req grp, SV *callback=&PL_sv_undef)	1514	feed (aio_req grp, SV *callback=&PL_sv_undef)
1865	CODE:	1515	CODE:
1866	{	1516	{
1867	SvREFCNT_dec (grp->sv2);	1517	SvREFCNT_dec (grp->sv2);
1868	grp->sv2 = newSVsv (callback);	1518	grp->sv2 = newSVsv (callback);
		1519	grp->feed = aio_grp_feed;
1869		1520
1870	if (grp->int2 <= 0)	1521	if (grp->int2 <= 0)
1871	grp->int2 = 2;	1522	grp->int2 = 2;
1872		1523
1873	aio_grp_feed (grp);	1524	eio_grp_limit (grp, grp->int2);
1874	}	1525	}
1875		1526

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