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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.87 by root, Mon Oct 30 23:42:27 2006 UTC vs.
Revision 1.162 by root, Sun Jan 10 23:05:12 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	#if !_POSIX_MAPPED_FILES
		26	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
		27	# define munmap(addr,length) (errno = ENOSYS, -1)
		28	#endif
		29
		30	/* perl namespace pollution */
		31	#undef VERSION
		32
		33	#ifdef _WIN32
		34
		35	# define EIO_STRUCT_DIRENT Direntry_t
		36	# undef malloc
		37	# undef free
		38
		39	// perl overrides all those nice win32 functions
		40	# undef open
		41	# undef read
		42	# undef write
		43	# undef send
		44	# undef recv
		45	# undef stat
		46	# undef fstat
		47	# define lstat stat
		48	# undef truncate
		49	# undef ftruncate
		50	# undef open
		51	# undef close
		52	# undef unlink
		53	# undef rmdir
		54	# undef rename
		55	# undef lseek
		56
		57	# define chown(a,b,c) (errno = ENOSYS, -1)
		58	# define fchown(a,b,c) (errno = ENOSYS, -1)
		59	# define fchmod(a,b) (errno = ENOSYS, -1)
		60	# define symlink(a,b) (errno = ENOSYS, -1)
		61	# define readlink(a,b,c) (errno = ENOSYS, -1)
		62	# define mknod(a,b,c) (errno = ENOSYS, -1)
		63	# define truncate(a,b) (errno = ENOSYS, -1)
		64	# define ftruncate(fd,o) chsize ((fd), (o))
		65	# define fsync(fd) _commit (fd)
		66	# define opendir(fd) (errno = ENOSYS, 0)
		67	# define readdir(fd) (errno = ENOSYS, -1)
		68	# define closedir(fd) (errno = ENOSYS, -1)
		69	# define mkdir(a,b) mkdir (a)
		70
		71	#else
		72
38	# include <sys/uio.h>	73	# include <sys/time.h>
39	# elif __hpux
40	# include <sys/socket.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	74	# include <sys/select.h>
		75	# include <unistd.h>
		76	# include <utime.h>
		77	# include <signal.h>
		78	# define EIO_STRUCT_DIRENT struct dirent
		79
		80	#endif
		81
		82	/* perl stupidly overrides readdir and maybe others */
		83	/* with thread-unsafe versions, imagine that :( */
		84	#undef readdir
		85	#undef opendir
		86	#undef closedir
		87
		88	#define EIO_STRUCT_STAT Stat_t
		89
		90	/* use NV for 32 bit perls as it allows larger offsets */
		91	#if IVSIZE >= 8
		92	# define VAL64 IV
		93	# define SvVAL64 SvIV
		94	# define newSVval64 newSViv
		95	#else
		96	# define VAL64 NV
		97	# define SvVAL64 SvNV
		98	# define newSVval64 newSVnv
		99	#endif
		100
		101	/*****************************************************************************/
		102
		103	#if __GNUC__ >= 3
		104	# define expect(expr,value) __builtin_expect ((expr),(value))
		105	#else
		106	# define expect(expr,value) (expr)
		107	#endif
		108
		109	#define expect_false(expr) expect ((expr) != 0, 0)
		110	#define expect_true(expr) expect ((expr) != 0, 1)
		111
		112	/*****************************************************************************/
		113
		114	typedef SV SV8; /* byte-sv, used for argument-checking */
		115	typedef int aio_rfd; /* read file desriptor */
		116	typedef int aio_wfd; /* write file descriptor */
		117
		118	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		119
		120	#define EIO_REQ_MEMBERS \
		121	SV *callback; \
		122	SV *sv1, *sv2; \
		123	STRLEN stroffset; \
		124	SV *self;
		125
		126	#define EIO_NO_WRAPPERS 1
		127
		128	#include "libeio/eio.h"
		129
		130	#ifndef POSIX_FADV_NORMAL
		131	# define POSIX_FADV_NORMAL 0
		132	# define NO_FADVISE 1
		133	#endif
		134	#ifndef POSIX_FADV_SEQUENTIAL
		135	# define POSIX_FADV_SEQUENTIAL 0
		136	#endif
		137	#ifndef POSIX_FADV_RANDOM
		138	# define POSIX_FADV_RANDOM 0
		139	#endif
		140	#ifndef POSIX_FADV_NOREUSE
		141	# define POSIX_FADV_NOREUSE 0
		142	#endif
		143	#ifndef POSIX_FADV_WILLNEED
		144	# define POSIX_FADV_WILLNEED 0
		145	#endif
		146	#ifndef POSIX_FADV_DONTNEED
		147	# define POSIX_FADV_DONTNEED 0
		148	#endif
		149
		150	#ifndef ST_NODEV
		151	# define ST_NODEV 0
		152	#endif
		153	#ifndef ST_NOEXEC
		154	# define ST_NOEXEC 0
		155	#endif
		156	#ifndef ST_SYNCHRONOUS
		157	# define ST_SYNCHRONOUS 0
		158	#endif
		159	#ifndef ST_MANDLOCK
		160	# define ST_MANDLOCK 0
		161	#endif
		162	#ifndef ST_WRITE
		163	# define ST_WRITE 0
		164	#endif
		165	#ifndef ST_APPEND
		166	# define ST_APPEND 0
		167	#endif
		168	#ifndef ST_IMMUTABLE
		169	# define ST_IMMUTABLE 0
		170	#endif
		171	#ifndef ST_NOATIME
		172	# define ST_NOATIME 0
		173	#endif
		174	#ifndef ST_NODIRATIME
		175	# define ST_NODIRATIME 0
		176	#endif
		177	#ifndef ST_RELATIME
		178	# define ST_RELATIME 0
		179	#endif
		180
		181	#ifndef MCL_CURRENT
		182	# define MCL_CURRENT 0
		183	#endif
		184	#ifndef MCL_FUTURE
		185	# define MCL_FUTURE 0
		186	#endif
		187
		188	#ifndef MAP_ANONYMOUS
		189	# ifdef MAP_ANON
		190	# define MAP_ANONYMOUS MAP_ANON
43	# else	191	# else
44	# error sendfile support requested but not available	192	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	193	# endif
46	#endif	194	#endif
47		195	#ifndef MAP_HUGETLB
48	/* number of seconds after which idle threads exit */	196	# 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	197	#endif
		198	#ifndef MAP_LOCKED
		199	# define MAP_LOCKED 0
79	#endif	200	#endif
		201	#ifndef MAP_NORESERVE
		202	# define MAP_NORESERVE 0
		203	#endif
		204	#ifndef MAP_POPULATE
		205	# define MAP_POPULATE 0
		206	#endif
		207	#ifndef MAP_NONBLOCK
		208	# define MAP_NONBLOCK 0
		209	#endif
80		210
81	/* buffer size for various temporary buffers */	211	#ifndef PAGESIZE
82	#define AIO_BUFSIZE 65536	212	# define PAGESIZE sysconf (_SC_PAGESIZE)
		213	#endif
83		214
84	#define dBUF \	215	static int req_invoke (eio_req *req);
85	char *aio_buf; \	216	#define EIO_FINISH(req) req_invoke (req)
86	LOCK (wrklock); \	217	static void req_destroy (eio_req *grp);
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	218	#define EIO_DESTROY(req) req_destroy (req)
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91		219
92	enum {	220	enum {
93	REQ_QUIT,	221	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, REQ_READLINK,
102	REQ_GROUP, REQ_NOP,
103	REQ_BUSY,
104	};	222	};
105		223
106	#define AIO_REQ_KLASS "IO::AIO::REQ"	224	#include "libeio/eio.c"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"
108		225
109	typedef struct aio_cb
110	{
111	struct aio_cb *volatile next;
112
113	SV *callback, *fh;
114	SV *sv1, *sv2;
115	void *ptr1, *ptr2;
116	off_t offs;
117	size_t size;
118	ssize_t result;
119
120	STRLEN stroffset;
121	int type;
122	int int1, int2;
123	int errorno;
124	mode_t mode; /* open */
125
126	unsigned char flags;
127	unsigned char pri;
128
129	SV *self; /* the perl counterpart of this request, if any */
130	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
131	} aio_cb;
132
133	enum {
134	FLAG_CANCELLED = 0x01,
135	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
136	FLAG_PTR2_FREE = 0x80, /* need free(ptr2) */
137	};
138
139	typedef aio_cb *aio_req;	226	typedef eio_req *aio_req;
140	typedef aio_cb *aio_req_ornot;	227	typedef eio_req *aio_req_ornot;
141		228
142	enum {	229	static SV *on_next_submit;
143	PRI_MIN = -4,	230	static int next_pri = EIO_PRI_DEFAULT;
144	PRI_MAX = 4,	231	static int max_outstanding;
145		232
146	DEFAULT_PRI = 0,	233	static s_epipe respipe;
147	PRI_BIAS = -PRI_MIN,
148	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
149	};
150		234
151	#define AIO_TICKS ((1000000 + 1023) >> 10)
152
153	static unsigned int max_poll_time = 0;
154	static unsigned int max_poll_reqs = 0;
155
156	/* calculcate time difference in ~1/AIO_TICKS of a second */
157	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
158	{
159	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
160	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
161	}
162
163	static int next_pri = DEFAULT_PRI + PRI_BIAS;
164
165	static unsigned int started, idle, wanted;
166
167	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
168	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
169	#else
170	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
171	#endif
172
173	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
174	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
175
176	/* worker threads management */
177	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
178
179	typedef struct worker {
180	/* locked by wrklock */
181	struct worker *prev, *next;
182
183	pthread_t tid;
184
185	/* locked by reslock, reqlock or wrklock */
186	aio_req req; /* currently processed request */
187	void *dbuf;
188	DIR *dirp;
189	} worker;
190
191	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
192
193	static void worker_clear (worker *wrk)
194	{
195	if (wrk->dirp)
196	{
197	closedir (wrk->dirp);
198	wrk->dirp = 0;
199	}
200
201	if (wrk->dbuf)
202	{
203	free (wrk->dbuf);
204	wrk->dbuf = 0;
205	}
206	}
207
208	static void worker_free (worker *wrk)
209	{
210	wrk->next->prev = wrk->prev;
211	wrk->prev->next = wrk->next;
212
213	free (wrk);
214	}
215
216	static volatile unsigned int nreqs, nready, npending;
217	static volatile unsigned int max_idle = 4;
218	static volatile unsigned int max_outstanding = 0xffffffff;
219	static int respipe [2];
220
221	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
222	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
223	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
224
225	#if WORDACCESS_UNSAFE
226
227	static unsigned int get_nready ()
228	{
229	unsigned int retval;
230
231	LOCK (reqlock);
232	retval = nready;
233	UNLOCK (reqlock);
234
235	return retval;
236	}
237
238	static unsigned int get_npending ()
239	{
240	unsigned int retval;
241
242	LOCK (reslock);
243	retval = npending;
244	UNLOCK (reslock);
245
246	return retval;
247	}
248
249	static unsigned int get_nthreads ()
250	{
251	unsigned int retval;
252
253	LOCK (wrklock);
254	retval = started;
255	UNLOCK (wrklock);
256
257	return retval;
258	}
259
260	#else
261
262	# define get_nready() nready
263	# define get_npending() npending
264	# define get_nthreads() started
265
266	#endif
267
268	/*
269	* a somewhat faster data structure might be nice, but
270	* with 8 priorities this actually needs <20 insns
271	* per shift, the most expensive operation.
272	*/
273	typedef struct {
274	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
275	int size;
276	} reqq;
277
278	static reqq req_queue;
279	static reqq res_queue;
280
281	int reqq_push (reqq *q, aio_req req)
282	{
283	int pri = req->pri;
284	req->next = 0;
285
286	if (q->qe[pri])
287	{
288	q->qe[pri]->next = req;
289	q->qe[pri] = req;
290	}
291	else
292	q->qe[pri] = q->qs[pri] = req;
293
294	return q->size++;
295	}
296
297	aio_req reqq_shift (reqq *q)
298	{
299	int pri;
300
301	if (!q->size)
302	return 0;
303
304	--q->size;
305
306	for (pri = NUM_PRI; pri--; )
307	{
308	aio_req req = q->qs[pri];
309
310	if (req)
311	{
312	if (!(q->qs[pri] = req->next))
313	q->qe[pri] = 0;
314
315	return req;
316	}
317	}
318
319	abort ();
320	}
321
322	static int poll_cb ();
323	static void req_invoke (aio_req req);
324	static void req_free (aio_req req);	235	static void req_destroy (aio_req req);
325	static void req_cancel (aio_req req);	236	static void req_cancel (aio_req req);
326		237
		238	static void want_poll (void)
		239	{
		240	/* write a dummy byte to the pipe so fh becomes ready */
		241	s_epipe_signal (&respipe);
		242	}
		243
		244	static void done_poll (void)
		245	{
		246	/* read any signals sent by the worker threads */
		247	s_epipe_drain (&respipe);
		248	}
		249
327	/* must be called at most once */	250	/* must be called at most once */
328	static SV *req_sv (aio_req req, const char *klass)	251	static SV *req_sv (aio_req req, HV *stash)
329	{	252	{
330	if (!req->self)	253	if (!req->self)
331	{	254	{
332	req->self = (SV *)newHV ();	255	req->self = (SV *)newHV ();
333	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	256	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
334	}	257	}
335		258
336	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	259	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
337	}	260	}
338		261
339	static aio_req SvAIO_REQ (SV *sv)	262	static aio_req SvAIO_REQ (SV *sv)
340	{	263	{
341	MAGIC *mg;	264	MAGIC *mg;
342		265
343	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	266	if (!SvROK (sv)
		267	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		268	&& SvSTASH (SvRV (sv)) != aio_req_stash
		269	&& !sv_derived_from (sv, "IO::AIO::REQ")))
344	croak ("object of class " AIO_REQ_KLASS " expected");	270	croak ("object of class IO::AIO::REQ expected");
345		271
346	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	272	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
347		273
348	return mg ? (aio_req)mg->mg_ptr : 0;	274	return mg ? (aio_req)mg->mg_ptr : 0;
349	}	275	}
350		276
351	static void aio_grp_feed (aio_req grp)	277	static void aio_grp_feed (aio_req grp)
352	{	278	{
353	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))	279	if (grp->sv2 && SvOK (grp->sv2))
354	{	280	{
355	int old_len = grp->size;
356
357	if (grp->sv2 && SvOK (grp->sv2))
358	{
359	dSP;	281	dSP;
360		282
361	ENTER;	283	ENTER;
362	SAVETMPS;	284	SAVETMPS;
363	PUSHMARK (SP);	285	PUSHMARK (SP);
364	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	286	XPUSHs (req_sv (grp, aio_grp_stash));
365	PUTBACK;	287	PUTBACK;
366	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	288	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
367	SPAGAIN;	289	SPAGAIN;
368	FREETMPS;	290	FREETMPS;
369	LEAVE;	291	LEAVE;
370	}
371
372	/* stop if no progress has been made */
373	if (old_len == grp->size)
374	{
375	SvREFCNT_dec (grp->sv2);
376	grp->sv2 = 0;
377	break;
378	}
379	}	292	}
380	}	293	}
381		294
382	static void aio_grp_dec (aio_req grp)	295	static void req_submit (eio_req *req)
383	{	296	{
384	--grp->size;	297	eio_submit (req);
385		298
386	/* call feeder, if applicable */	299	if (expect_false (on_next_submit))
387	aio_grp_feed (grp);
388
389	/* finish, if done */
390	if (!grp->size && grp->int1)
391	{	300	{
392	req_invoke (grp);	301	dSP;
393	req_free (grp);	302	SV *cb = sv_2mortal (on_next_submit);
		303
		304	on_next_submit = 0;
		305
		306	PUSHMARK (SP);
		307	PUTBACK;
		308	call_sv (cb, G_DISCARD | G_EVAL);
394	}	309	}
395	}	310	}
396		311
397	static void req_invoke (aio_req req)	312	static int req_invoke (eio_req *req)
398	{	313	{
399	dSP;	314	dSP;
400		315
401	if (req->flags & FLAG_SV1_RO_OFF)	316	if (req->flags & FLAG_SV2_RO_OFF)
402	SvREADONLY_off (req->sv1);	317	SvREADONLY_off (req->sv2);
403		318
404	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	319	if (!EIO_CANCELLED (req) && req->callback)
405	{	320	{
406	ENTER;	321	ENTER;
407	SAVETMPS;	322	SAVETMPS;
408	PUSHMARK (SP);	323	PUSHMARK (SP);
409	EXTEND (SP, 1);	324	EXTEND (SP, 1);
410		325
411	switch (req->type)	326	switch (req->type)
412	{	327	{
413	case REQ_READDIR:	328	case EIO_READDIR:
414	{	329	{
415	SV *rv = &PL_sv_undef;	330	SV *rv = &PL_sv_undef;
416		331
417	if (req->result >= 0)	332	if (req->result >= 0)
418	{	333	{
419	int i;	334	int i;
420	char *buf = req->ptr2;	335	char *names = (char *)req->ptr2;
		336	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
421	AV *av = newAV ();	337	AV *av = newAV ();
422		338
423	av_extend (av, req->result - 1);	339	av_extend (av, req->result - 1);
424		340
425	for (i = 0; i < req->result; ++i)	341	for (i = 0; i < req->result; ++i)
426	{	342	{
427	SV *sv = newSVpv (buf, 0);	343	if (req->int1 & EIO_READDIR_DENTS)
		344	{
		345	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
428		346
		347	if (req->int1 & EIO_READDIR_CUSTOM2)
		348	{
		349	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		350	AV *avent = newAV ();
		351
		352	av_extend (avent, 2);
		353
		354	if (!sv_type [ent->type])
		355	{
		356	sv_type [ent->type] = newSViv (ent->type);
		357	SvREADONLY_on (sv_type [ent->type]);
		358	}
		359
		360	av_store (avent, 0, namesv);
		361	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		362	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		363
		364	av_store (av, i, newRV_noinc ((SV *)avent));
		365	}
		366	else
429	av_store (av, i, sv);	367	av_store (av, i, namesv);
		368
		369	++ent;
		370	}
		371	else
		372	{
		373	SV *name = newSVpv (names, 0);
		374	av_store (av, i, name);
430	buf += SvCUR (sv) + 1;	375	names += SvCUR (name) + 1;
		376	}
431	}	377	}
432		378
433	rv = sv_2mortal (newRV_noinc ((SV *)av));	379	rv = sv_2mortal (newRV_noinc ((SV *)av));
434	}	380	}
435		381
436	PUSHs (rv);	382	PUSHs (rv);
		383
		384	if (req->int1 & EIO_READDIR_CUSTOM1)
		385	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
437	}	386	}
438	break;	387	break;
439		388
440	case REQ_OPEN:	389	case EIO_OPEN:
441	{	390	{
442	/* convert fd to fh */	391	/* convert fd to fh */
443	SV *fh;	392	SV *fh = &PL_sv_undef;
444		393
445	PUSHs (sv_2mortal (newSViv (req->result)));	394	if (req->result >= 0)
446	PUTBACK;	395	{
447	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	396	GV *gv = (GV *)sv_newmortal ();
448	SPAGAIN;	397	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		398	char sym [64];
		399	int symlen;
		400
		401	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		402	gv_init (gv, aio_stash, sym, symlen, 0);
449		403
450	fh = SvREFCNT_inc (POPs);	404	symlen = snprintf (
		405	sym,
		406	sizeof (sym),
		407	"%s&=%d",
		408	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		409	(int)req->result
		410	);
451		411
		412	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		413	fh = (SV *)gv;
		414	}
		415
452	PUSHMARK (SP);	416	PUSHs (fh);
453	XPUSHs (sv_2mortal (fh));
454	}	417	}
455	break;	418	break;
456		419
		420	case EIO_STATVFS:
		421	case EIO_FSTATVFS:
		422	{
		423	SV *rv = &PL_sv_undef;
		424
		425	if (req->result >= 0)
		426	{
		427	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		428	HV *hv = newHV ();
		429
		430	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		431
		432	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		433	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		434	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		435	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		436	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		437	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		438	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		439	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		440	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		441	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		442	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		443	}
		444
		445	PUSHs (rv);
		446	}
		447
		448	break;
		449
457	case REQ_GROUP:	450	case EIO_GROUP:
458	req->int1 = 2; /* mark group as finished */	451	req->int1 = 2; /* mark group as finished */
459		452
460	if (req->sv1)	453	if (req->sv1)
461	{	454	{
462	int i;	455	int i;
…		…
466	for (i = 0; i <= AvFILL (av); ++i)	459	for (i = 0; i <= AvFILL (av); ++i)
467	PUSHs (*av_fetch (av, i, 0));	460	PUSHs (*av_fetch (av, i, 0));
468	}	461	}
469	break;	462	break;
470		463
471	case REQ_NOP:	464	case EIO_NOP:
472	case REQ_BUSY:	465	case EIO_BUSY:
473	break;	466	break;
474		467
475	case REQ_READLINK:	468	case EIO_READLINK:
476	if (req->result > 0)	469	if (req->result > 0)
477	{	470	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
478	SvCUR_set (req->sv1, req->result);
479	*SvEND (req->sv1) = 0;
480	PUSHs (req->sv1);
481	}
482	break;	471	break;
483		472
484	case REQ_STAT:	473	case EIO_STAT:
485	case REQ_LSTAT:	474	case EIO_LSTAT:
486	case REQ_FSTAT:	475	case EIO_FSTAT:
487	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	476	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
488	PL_laststatval = req->result;	477	PL_laststatval = req->result;
489	PL_statcache = *(Stat_t *)(req->ptr2);	478	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
490	PUSHs (sv_2mortal (newSViv (req->result)));	479	PUSHs (sv_2mortal (newSViv (req->result)));
491	break;	480	break;
492		481
493	case REQ_READ:	482	case EIO_READ:
		483	{
494	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	484	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
495	*SvEND (req->sv1) = 0;	485	*SvEND (req->sv2) = 0;
		486	SvPOK_only (req->sv2);
		487	SvSETMAGIC (req->sv2);
496	PUSHs (sv_2mortal (newSViv (req->result)));	488	PUSHs (sv_2mortal (newSViv (req->result)));
		489	}
497	break;	490	break;
		491
		492	case EIO_DUP2:
		493	if (req->result > 0)
		494	req->result = 0;
		495	/* FALLTHROUGH */
498		496
499	default:	497	default:
500	PUSHs (sv_2mortal (newSViv (req->result)));	498	PUSHs (sv_2mortal (newSViv (req->result)));
501	break;	499	break;
502	}	500	}
503		501
504	errno = req->errorno;	502	errno = req->errorno;
505		503
506	PUTBACK;	504	PUTBACK;
507	call_sv (req->callback, G_VOID | G_EVAL);	505	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
508	SPAGAIN;	506	SPAGAIN;
509		507
510	FREETMPS;	508	FREETMPS;
511	LEAVE;	509	LEAVE;
		510
		511	PUTBACK;
512	}	512	}
513		513
514	if (req->grp)	514	return !!SvTRUE (ERRSV);
515	{
516	aio_req grp = req->grp;
517
518	/* unlink request */
519	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
520	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
521
522	if (grp->grp_first == req)
523	grp->grp_first = req->grp_next;
524
525	aio_grp_dec (grp);
526	}
527
528	if (SvTRUE (ERRSV))
529	{
530	req_free (req);
531	croak (0);
532	}
533	}	515	}
534		516
535	static void req_free (aio_req req)	517	static void req_destroy (aio_req req)
536	{	518	{
537	if (req->self)	519	if (req->self)
538	{	520	{
539	sv_unmagic (req->self, PERL_MAGIC_ext);	521	sv_unmagic (req->self, PERL_MAGIC_ext);
540	SvREFCNT_dec (req->self);	522	SvREFCNT_dec (req->self);
541	}	523	}
542		524
543	SvREFCNT_dec (req->fh);
544	SvREFCNT_dec (req->sv1);	525	SvREFCNT_dec (req->sv1);
545	SvREFCNT_dec (req->sv2);	526	SvREFCNT_dec (req->sv2);
546	SvREFCNT_dec (req->callback);	527	SvREFCNT_dec (req->callback);
547		528
548	if (req->flags & FLAG_PTR2_FREE)
549	free (req->ptr2);
550
551	Safefree (req);	529	Safefree (req);
552	}	530	}
553		531
554	static void req_cancel_subs (aio_req grp)	532	static void req_cancel_subs (aio_req grp)
555	{	533	{
556	aio_req sub;	534	aio_req sub;
557		535
558	if (grp->type != REQ_GROUP)	536	if (grp->type != EIO_GROUP)
559	return;	537	return;
560		538
561	SvREFCNT_dec (grp->sv2);	539	SvREFCNT_dec (grp->sv2);
562	grp->sv2 = 0;	540	grp->sv2 = 0;
563		541
564	for (sub = grp->grp_first; sub; sub = sub->grp_next)	542	eio_grp_cancel (grp);
565	req_cancel (sub);
566	}	543	}
567		544
568	static void req_cancel (aio_req req)	545	static void
		546	create_respipe (void)
569	{	547	{
570	req->flags |= FLAG_CANCELLED;	548	if (s_epipe_renew (&respipe))
571		549	croak ("IO::AIO: unable to initialize result pipe");
572	req_cancel_subs (req);
573	}	550	}
574		551
575	static void *aio_proc(void *arg);
576
577	static void start_thread (void)
578	{
579	sigset_t fullsigset, oldsigset;
580	pthread_attr_t attr;
581
582	worker *wrk = calloc (1, sizeof (worker));
583
584	if (!wrk)
585	croak ("unable to allocate worker thread data");
586
587	pthread_attr_init (&attr);
588	pthread_attr_setstacksize (&attr, STACKSIZE);
589	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
590	#ifdef PTHREAD_SCOPE_PROCESS
591	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
592	#endif
593
594	sigfillset (&fullsigset);
595
596	LOCK (wrklock);
597	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
598
599	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
600	{
601	wrk->prev = &wrk_first;
602	wrk->next = wrk_first.next;
603	wrk_first.next->prev = wrk;
604	wrk_first.next = wrk;
605	++started;
606	}
607	else
608	free (wrk);
609
610	sigprocmask (SIG_SETMASK, &oldsigset, 0);
611	UNLOCK (wrklock);
612	}
613
614	static void maybe_start_thread ()
615	{
616	if (get_nthreads () >= wanted)
617	return;
618
619	/* todo: maybe use idle here, but might be less exact */
620	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
621	return;
622
623	start_thread ();
624	}
625
626	static void req_send (aio_req req)
627	{
628	++nreqs;
629
630	LOCK (reqlock);
631	++nready;
632	reqq_push (&req_queue, req);
633	pthread_cond_signal (&reqwait);
634	UNLOCK (reqlock);
635
636	maybe_start_thread ();
637	}
638
639	static void end_thread (void)
640	{
641	aio_req req;
642
643	Newz (0, req, 1, aio_cb);
644
645	req->type = REQ_QUIT;
646	req->pri = PRI_MAX + PRI_BIAS;
647
648	LOCK (reqlock);
649	reqq_push (&req_queue, req);
650	pthread_cond_signal (&reqwait);
651	UNLOCK (reqlock);
652
653	LOCK (wrklock);
654	--started;
655	UNLOCK (wrklock);
656	}
657
658	static void set_max_idle (int nthreads)
659	{
660	if (WORDACCESS_UNSAFE) LOCK (reqlock);
661	max_idle = nthreads <= 0 ? 1 : nthreads;
662	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
663	}
664
665	static void min_parallel (int nthreads)
666	{
667	if (wanted < nthreads)
668	wanted = nthreads;
669	}
670
671	static void max_parallel (int nthreads)
672	{
673	if (wanted > nthreads)
674	wanted = nthreads;
675
676	while (started > wanted)
677	end_thread ();
678	}
679
680	static void poll_wait ()	552	static void poll_wait (void)
681	{	553	{
682	fd_set rfd;
683
684	while (nreqs)	554	while (eio_nreqs ())
685	{	555	{
686	int size;	556	int size;
687	if (WORDACCESS_UNSAFE) LOCK (reslock);	557
		558	X_LOCK (reslock);
688	size = res_queue.size;	559	size = res_queue.size;
689	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	560	X_UNLOCK (reslock);
690		561
691	if (size)	562	if (size)
692	return;	563	return;
693		564
694	maybe_start_thread ();	565	etp_maybe_start_thread ();
695		566
696	FD_ZERO(&rfd);	567	s_epipe_wait (&respipe);
697	FD_SET(respipe [0], &rfd);
698
699	select (respipe [0] + 1, &rfd, 0, 0, 0);
700	}	568	}
701	}	569	}
702		570
703	static int poll_cb ()	571	static int poll_cb (void)
704	{	572	{
705	dSP;
706	int count = 0;
707	int maxreqs = max_poll_reqs;
708	int do_croak = 0;
709	struct timeval tv_start, tv_now;
710	aio_req req;
711
712	if (max_poll_time)
713	gettimeofday (&tv_start, 0);
714
715	for (;;)	573	for (;;)
716	{	574	{
717	for (;;)	575	int res = eio_poll ();
718	{
719	maybe_start_thread ();
720		576
721	LOCK (reslock);	577	if (res > 0)
722	req = reqq_shift (&res_queue);
723
724	if (req)
725	{
726	--npending;
727
728	if (!res_queue.size)
729	{
730	/* read any signals sent by the worker threads */
731	char buf [32];
732	while (read (respipe [0], buf, 32) == 32)
733	;
734	}
735	}
736
737	UNLOCK (reslock);
738
739	if (!req)
740	break;
741
742	--nreqs;
743
744	if (req->type == REQ_GROUP && req->size)
745	{
746	req->int1 = 1; /* mark request as delayed */
747	continue;
748	}
749	else
750	{
751	req_invoke (req);
752
753	count++;
754	}
755
756	req_free (req);
757
758	if (maxreqs && !--maxreqs)
759	break;
760
761	if (max_poll_time)
762	{
763	gettimeofday (&tv_now, 0);
764
765	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
766	break;
767	}
768	}
769
770	if (nreqs <= max_outstanding)
771	break;	578	croak (0);
		579
		580	if (!max_outstanding || max_outstanding > eio_nreqs ())
		581	return res;
772		582
773	poll_wait ();	583	poll_wait ();
774
775	++maxreqs;
776	}	584	}
777
778	return count;
779	}	585	}
780		586
781	static void create_pipe ()	587	static void atfork_child (void)
782	{	588	{
783	if (pipe (respipe))	589	create_respipe ();
784	croak ("unable to initialize result pipe");
785
786	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
787	croak ("cannot set result pipe to nonblocking mode");
788
789	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
790	croak ("cannot set result pipe to nonblocking mode");
791	}	590	}
792		591
793	/*****************************************************************************/	592	/*****************************************************************************/
794	/* work around various missing functions */
795		593
796	#if !HAVE_PREADWRITE	594	#define MMAP_MAGIC PERL_MAGIC_ext
797	# define pread aio_pread
798	# define pwrite aio_pwrite
799		595
800	/*	596	static int
801	* make our pread/pwrite safe against themselves, but not against	597	mmap_free (pTHX_ SV *sv, MAGIC *mg)
802	* normal read/write by using a mutex. slows down execution a lot,
803	* but that's your problem, not mine.
804	*/
805	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
806
807	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
808	{	598	{
809	ssize_t res;	599	int old_errno = errno;
810	off_t ooffset;	600	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
811
812	LOCK (preadwritelock);
813	ooffset = lseek (fd, 0, SEEK_CUR);
814	lseek (fd, offset, SEEK_SET);
815	res = read (fd, buf, count);
816	lseek (fd, ooffset, SEEK_SET);
817	UNLOCK (preadwritelock);
818
819	return res;
820	}
821
822	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
823	{
824	ssize_t res;
825	off_t ooffset;
826
827	LOCK (preadwritelock);
828	ooffset = lseek (fd, 0, SEEK_CUR);
829	lseek (fd, offset, SEEK_SET);
830	res = write (fd, buf, count);
831	lseek (fd, offset, SEEK_SET);
832	UNLOCK (preadwritelock);
833
834	return res;
835	}
836	#endif
837
838	#if !HAVE_FDATASYNC
839	# define fdatasync fsync
840	#endif
841
842	#if !HAVE_READAHEAD
843	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
844
845	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
846	{
847	dBUF;
848
849	while (count > 0)
850	{
851	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
852
853	pread (fd, aio_buf, len, offset);
854	offset += len;
855	count -= len;
856	}
857
858	errno = 0;
859	}
860
861	#endif
862
863	#if !HAVE_READDIR_R
864	# define readdir_r aio_readdir_r
865
866	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
867
868	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
869	{
870	struct dirent *e;
871	int errorno;
872
873	LOCK (readdirlock);
874
875	e = readdir (dirp);
876	errorno = errno;	601	errno = old_errno;
877		602
878	if (e)	603	mg->mg_obj = 0; /* just in case */
879	{
880	*res = ent;
881	strcpy (ent->d_name, e->d_name);
882	}
883	else
884	*res = 0;
885		604
886	UNLOCK (readdirlock);	605	SvREADONLY_off (sv);
		606	SvCUR_set (sv, 0);
		607	SvLEN_set (sv, 0);
		608	SvPVX (sv) = 0;
		609	SvOK_off (sv);
887		610
888	errno = errorno;
889	return e ? 0 : -1;
890	}
891	#endif
892
893	/* sendfile always needs emulation */
894	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
895	{
896	ssize_t res;
897
898	if (!count)
899	return 0;	611	return 0;
900
901	#if HAVE_SENDFILE
902	# if __linux
903	res = sendfile (ofd, ifd, &offset, count);
904
905	# elif __freebsd
906	/*
907	* Of course, the freebsd sendfile is a dire hack with no thoughts
908	* wasted on making it similar to other I/O functions.
909	*/
910	{
911	off_t sbytes;
912	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
913
914	if (res < 0 && sbytes)
915	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
916	res = sbytes;
917	}
918
919	# elif __hpux
920	res = sendfile (ofd, ifd, offset, count, 0, 0);
921
922	# elif __solaris
923	{
924	struct sendfilevec vec;
925	size_t sbytes;
926
927	vec.sfv_fd = ifd;
928	vec.sfv_flag = 0;
929	vec.sfv_off = offset;
930	vec.sfv_len = count;
931
932	res = sendfilev (ofd, &vec, 1, &sbytes);
933
934	if (res < 0 && sbytes)
935	res = sbytes;
936	}
937
938	# endif
939	#else
940	res = -1;
941	errno = ENOSYS;
942	#endif
943
944	if (res < 0
945	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
946	#if __solaris
947	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
948	#endif
949	)
950	)
951	{
952	/* emulate sendfile. this is a major pain in the ass */
953	dBUF;
954
955	res = 0;
956
957	while (count)
958	{
959	ssize_t cnt;
960
961	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
962
963	if (cnt <= 0)
964	{
965	if (cnt && !res) res = -1;
966	break;
967	}
968
969	cnt = write (ofd, aio_buf, cnt);
970
971	if (cnt <= 0)
972	{
973	if (cnt && !res) res = -1;
974	break;
975	}
976
977	offset += cnt;
978	res += cnt;
979	count -= cnt;
980	}
981	}
982
983	return res;
984	}	612	}
985		613
986	/* read a full directory */	614	static MGVTBL mmap_vtbl = {
987	static void scandir_ (aio_req req, worker *self)	615	0, 0, 0, 0, mmap_free
988	{	616	};
989	DIR *dirp;
990	union
991	{
992	struct dirent d;
993	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
994	} *u;
995	struct dirent *entp;
996	char *name, *names;
997	int memlen = 4096;
998	int memofs = 0;
999	int res = 0;
1000	int errorno;
1001
1002	LOCK (wrklock);
1003	self->dirp = dirp = opendir (req->ptr1);
1004	self->dbuf = u = malloc (sizeof (*u));
1005	req->flags |= FLAG_PTR2_FREE;
1006	req->ptr2 = names = malloc (memlen);
1007	UNLOCK (wrklock);
1008
1009	if (dirp && u && names)
1010	for (;;)
1011	{
1012	errno = 0;
1013	readdir_r (dirp, &u->d, &entp);
1014
1015	if (!entp)
1016	break;
1017
1018	name = entp->d_name;
1019
1020	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1021	{
1022	int len = strlen (name) + 1;
1023
1024	res++;
1025
1026	while (memofs + len > memlen)
1027	{
1028	memlen *= 2;
1029	LOCK (wrklock);
1030	req->ptr2 = names = realloc (names, memlen);
1031	UNLOCK (wrklock);
1032
1033	if (!names)
1034	break;
1035	}
1036
1037	memcpy (names + memofs, name, len);
1038	memofs += len;
1039	}
1040	}
1041
1042	if (errno)
1043	res = -1;
1044
1045	req->result = res;
1046	}
1047		617
1048	/*****************************************************************************/	618	/*****************************************************************************/
1049		619
1050	static void *aio_proc (void *thr_arg)	620	static SV *
		621	get_cb (SV *cb_sv)
1051	{	622	{
1052	aio_req req;	623	SvGETMAGIC (cb_sv);
1053	struct timespec ts;	624	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1054	worker *self = (worker *)thr_arg;
1055
1056	/* try to distribute timeouts somewhat evenly */
1057	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1058	* (1000000000UL / 1024UL);
1059
1060	for (;;)
1061	{
1062	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1063
1064	LOCK (reqlock);
1065
1066	for (;;)
1067	{
1068	self->req = req = reqq_shift (&req_queue);
1069
1070	if (req)
1071	break;
1072
1073	++idle;
1074
1075	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1076	== ETIMEDOUT)
1077	{
1078	if (idle > max_idle)
1079	{
1080	--idle;
1081	UNLOCK (reqlock);
1082	LOCK (wrklock);
1083	--started;
1084	UNLOCK (wrklock);
1085	goto quit;
1086	}
1087
1088	/* we are allowed to idle, so do so without any timeout */
1089	pthread_cond_wait (&reqwait, &reqlock);
1090	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1091	}
1092
1093	--idle;
1094	}
1095
1096	--nready;
1097
1098	UNLOCK (reqlock);
1099
1100	errno = 0; /* strictly unnecessary */
1101
1102	if (!(req->flags & FLAG_CANCELLED))
1103	switch (req->type)
1104	{
1105	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1106	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1107
1108	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1109	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1110
1111	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1112	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1113	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1114
1115	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1116	case REQ_CLOSE: req->result = close (req->int1); break;
1117	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1118	case REQ_RMDIR: req->result = rmdir (req->ptr1); 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	/* write a dummy byte to the pipe so fh becomes ready */
1159	write (respipe [1], &respipe, 1);
1160
1161	self->req = 0;
1162	worker_clear (self);
1163
1164	UNLOCK (reslock);
1165	}
1166
1167	quit:
1168	LOCK (wrklock);
1169	worker_free (self);
1170	UNLOCK (wrklock);
1171
1172	return 0;
1173	}
1174
1175	/*****************************************************************************/
1176
1177	static void atfork_prepare (void)
1178	{
1179	LOCK (wrklock);
1180	LOCK (reqlock);
1181	LOCK (reslock);
1182	#if !HAVE_PREADWRITE
1183	LOCK (preadwritelock);
1184	#endif
1185	#if !HAVE_READDIR_R
1186	LOCK (readdirlock);
1187	#endif
1188	}
1189
1190	static void atfork_parent (void)
1191	{
1192	#if !HAVE_READDIR_R
1193	UNLOCK (readdirlock);
1194	#endif
1195	#if !HAVE_PREADWRITE
1196	UNLOCK (preadwritelock);
1197	#endif
1198	UNLOCK (reslock);
1199	UNLOCK (reqlock);
1200	UNLOCK (wrklock);
1201	}
1202
1203	static void atfork_child (void)
1204	{
1205	aio_req prv;
1206
1207	while (prv = reqq_shift (&req_queue))
1208	req_free (prv);
1209
1210	while (prv = reqq_shift (&res_queue))
1211	req_free (prv);
1212
1213	while (wrk_first.next != &wrk_first)
1214	{
1215	worker *wrk = wrk_first.next;
1216
1217	if (wrk->req)
1218	req_free (wrk->req);
1219
1220	worker_clear (wrk);
1221	worker_free (wrk);
1222	}
1223
1224	started = 0;
1225	idle = 0;
1226	nreqs = 0;
1227	nready = 0;
1228	npending = 0;
1229
1230	close (respipe [0]);
1231	close (respipe [1]);
1232	create_pipe ();
1233
1234	atfork_parent ();
1235	}	625	}
1236		626
1237	#define dREQ \	627	#define dREQ \
		628	SV *cb_cv; \
1238	aio_req req; \	629	aio_req req; \
1239	int req_pri = next_pri; \	630	int req_pri = next_pri; \
1240	next_pri = DEFAULT_PRI + PRI_BIAS; \	631	next_pri = EIO_PRI_DEFAULT; \
1241	\	632	\
1242	if (SvOK (callback) && !SvROK (callback)) \	633	cb_cv = get_cb (callback); \
1243	croak ("callback must be undef or of reference type"); \
1244	\	634	\
1245	Newz (0, req, 1, aio_cb); \	635	Newz (0, req, 1, eio_req); \
1246	if (!req) \	636	if (!req) \
1247	croak ("out of memory during aio_req allocation"); \	637	croak ("out of memory during eio_req allocation"); \
1248	\	638	\
1249	req->callback = newSVsv (callback); \	639	req->callback = SvREFCNT_inc (cb_cv); \
1250	req->pri = req_pri	640	req->pri = req_pri
1251		641
1252	#define REQ_SEND \	642	#define REQ_SEND \
		643	PUTBACK; \
1253	req_send (req); \	644	req_submit (req); \
		645	SPAGAIN; \
1254	\	646	\
1255	if (GIMME_V != G_VOID) \	647	if (GIMME_V != G_VOID) \
1256	XPUSHs (req_sv (req, AIO_REQ_KLASS));	648	XPUSHs (req_sv (req, aio_req_stash));
1257		649
1258	MODULE = IO::AIO PACKAGE = IO::AIO	650	MODULE = IO::AIO PACKAGE = IO::AIO
1259		651
1260	PROTOTYPES: ENABLE	652	PROTOTYPES: ENABLE
1261		653
1262	BOOT:	654	BOOT:
1263	{	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_CREAT)
		668	const_iv (O_TRUNC)
		669	#ifndef _WIN32
		670	const_iv (S_IFIFO)
		671	#endif
		672	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		673	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		674	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		675	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		676	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		677	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		678
		679	const_iv (ST_RDONLY)
		680	const_iv (ST_NOSUID)
		681	const_iv (ST_NODEV)
		682	const_iv (ST_NOEXEC)
		683	const_iv (ST_SYNCHRONOUS)
		684	const_iv (ST_MANDLOCK)
		685	const_iv (ST_WRITE)
		686	const_iv (ST_APPEND)
		687	const_iv (ST_IMMUTABLE)
		688	const_iv (ST_NOATIME)
		689	const_iv (ST_NODIRATIME)
		690	const_iv (ST_RELATIME)
		691
		692	const_iv (PROT_EXEC)
		693	const_iv (PROT_NONE)
		694	const_iv (PROT_READ)
		695	const_iv (PROT_WRITE)
		696
		697	/*const_iv (MAP_FIXED)*/
		698	const_iv (MAP_PRIVATE)
		699	const_iv (MAP_SHARED)
		700	const_iv (MAP_ANONYMOUS)
		701
		702	/* linuxish */
		703	const_iv (MAP_HUGETLB)
		704	const_iv (MAP_LOCKED)
		705	const_iv (MAP_NORESERVE)
		706	const_iv (MAP_POPULATE)
		707	const_iv (MAP_NONBLOCK)
		708
		709	const_iv (MCL_FUTURE)
		710	const_iv (MCL_CURRENT)
		711
		712	const_eio (MS_ASYNC)
		713	const_eio (MS_INVALIDATE)
		714	const_eio (MS_SYNC)
		715
		716	const_eio (MT_MODIFY)
		717
		718	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		719	const_eio (SYNC_FILE_RANGE_WRITE)
		720	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		721
		722	const_eio (READDIR_DENTS)
		723	const_eio (READDIR_DIRS_FIRST)
		724	const_eio (READDIR_STAT_ORDER)
		725	const_eio (READDIR_FOUND_UNKNOWN)
		726
		727	const_eio (DT_UNKNOWN)
		728	const_eio (DT_FIFO)
		729	const_eio (DT_CHR)
		730	const_eio (DT_DIR)
		731	const_eio (DT_BLK)
		732	const_eio (DT_REG)
		733	const_eio (DT_LNK)
		734	const_eio (DT_SOCK)
		735	const_eio (DT_WHT)
		736	};
		737
1264	HV *stash = gv_stashpv ("IO::AIO", 1);	738	aio_stash = gv_stashpv ("IO::AIO" , 1);
		739	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		740	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1265		741
1266	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	742	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1267	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	743	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1268	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1269	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1270	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1271	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1272		744
		745	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		746
1273	create_pipe ();	747	create_respipe ();
1274	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	748
		749	if (eio_init (want_poll, done_poll) < 0)
		750	croak ("IO::AIO: unable to initialise eio library");
		751
		752	/* atfork child called in fifo order, so before eio's handler */
		753	X_THREAD_ATFORK (0, 0, atfork_child);
1275	}	754	}
1276		755
1277	void	756	void
1278	max_poll_reqs (int nreqs)	757	max_poll_reqs (int nreqs)
1279	PROTOTYPE: $	758	PROTOTYPE: $
1280	CODE:	759	CODE:
1281	max_poll_reqs = nreqs;	760	eio_set_max_poll_reqs (nreqs);
1282		761
1283	void	762	void
1284	max_poll_time (double nseconds)	763	max_poll_time (double nseconds)
1285	PROTOTYPE: $	764	PROTOTYPE: $
1286	CODE:	765	CODE:
1287	max_poll_time = nseconds * AIO_TICKS;	766	eio_set_max_poll_time (nseconds);
1288		767
1289	void	768	void
1290	min_parallel (int nthreads)	769	min_parallel (int nthreads)
1291	PROTOTYPE: $	770	PROTOTYPE: $
		771	CODE:
		772	eio_set_min_parallel (nthreads);
1292		773
1293	void	774	void
1294	max_parallel (int nthreads)	775	max_parallel (int nthreads)
1295	PROTOTYPE: $	776	PROTOTYPE: $
		777	CODE:
		778	eio_set_max_parallel (nthreads);
1296		779
1297	void	780	void
1298	max_idle (int nthreads)	781	max_idle (int nthreads)
1299	PROTOTYPE: $	782	PROTOTYPE: $
1300	CODE:	783	CODE:
1301	set_max_idle (nthreads);	784	eio_set_max_idle (nthreads);
1302		785
1303	int	786	void
1304	max_outstanding (int maxreqs)	787	max_outstanding (int maxreqs)
1305	PROTOTYPE: $	788	PROTOTYPE: $
1306	CODE:	789	CODE:
1307	RETVAL = max_outstanding;
1308	max_outstanding = maxreqs;	790	max_outstanding = maxreqs;
1309	OUTPUT:
1310	RETVAL
1311		791
1312	void	792	void
1313	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	793	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1314	SV * pathname
1315	int flags
1316	int mode
1317	SV * callback
1318	PROTOTYPE: $$$;$	794	PROTOTYPE: $$$;$
1319	PPCODE:	795	PPCODE:
1320	{	796	{
1321	dREQ;	797	dREQ;
1322		798
1323	req->type = REQ_OPEN;	799	req->type = EIO_OPEN;
1324	req->sv1 = newSVsv (pathname);	800	req->sv1 = newSVsv (pathname);
1325	req->ptr1 = SvPVbyte_nolen (pathname);	801	req->ptr1 = SvPVbyte_nolen (req->sv1);
1326	req->int1 = flags;	802	req->int1 = flags;
1327	req->mode = mode;	803	req->int2 = mode;
1328		804
1329	REQ_SEND;	805	REQ_SEND;
1330	}	806	}
1331		807
1332	void	808	void
1333	aio_close (fh,callback=&PL_sv_undef)	809	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1334	SV * fh
1335	SV * callback
1336	PROTOTYPE: $;$	810	PROTOTYPE: $;$
1337	ALIAS:	811	ALIAS:
1338	aio_close = REQ_CLOSE
1339	aio_fsync = REQ_FSYNC	812	aio_fsync = EIO_FSYNC
1340	aio_fdatasync = REQ_FDATASYNC	813	aio_fdatasync = EIO_FDATASYNC
1341	PPCODE:	814	PPCODE:
1342	{	815	{
		816	int fd = s_fileno_croak (fh, 0);
1343	dREQ;	817	dREQ;
1344		818
1345	req->type = ix;	819	req->type = ix;
1346	req->fh = newSVsv (fh);	820	req->sv1 = newSVsv (fh);
1347	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	821	req->int1 = fd;
1348		822
1349	REQ_SEND (req);	823	REQ_SEND (req);
1350	}	824	}
1351		825
1352	void	826	void
		827	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		828	PROTOTYPE: $$$$;$
		829	PPCODE:
		830	{
		831	int fd = s_fileno_croak (fh, 0);
		832	dREQ;
		833
		834	req->type = EIO_SYNC_FILE_RANGE;
		835	req->sv1 = newSVsv (fh);
		836	req->int1 = fd;
		837	req->offs = offset;
		838	req->size = nbytes;
		839	req->int2 = flags;
		840
		841	REQ_SEND (req);
		842	}
		843
		844	void
		845	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		846	PROTOTYPE: $;$
		847	PPCODE:
		848	{
		849	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		850	int fd = s_fileno_croak (fh, 0);
		851	dREQ;
		852
		853	if (close_pipe < 0)
		854	{
		855	int pipefd [2];
		856
		857	if (pipe (pipefd) < 0
		858	|| close (pipefd [1]) < 0
		859	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		860	abort (); /*D*/
		861
		862	close_pipe = pipefd [0];
		863	}
		864
		865	req->type = EIO_DUP2;
		866	req->int1 = close_pipe;
		867	req->sv2 = newSVsv (fh);
		868	req->int2 = fd;
		869
		870	REQ_SEND (req);
		871	}
		872
		873	void
1353	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	874	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1354	SV * fh
1355	UV offset
1356	UV length
1357	SV * data
1358	UV dataoffset
1359	SV * callback
1360	ALIAS:	875	ALIAS:
1361	aio_read = REQ_READ	876	aio_read = EIO_READ
1362	aio_write = REQ_WRITE	877	aio_write = EIO_WRITE
1363	PROTOTYPE: $$$$$;$	878	PROTOTYPE: $$$$$;$
1364	PPCODE:	879	PPCODE:
1365	{	880	{
1366	STRLEN svlen;	881	STRLEN svlen;
		882	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1367	char *svptr = SvPVbyte (data, svlen);	883	char *svptr = SvPVbyte (data, svlen);
1368		884	UV len = SvUV (length);
1369	SvUPGRADE (data, SVt_PV);
1370	SvPOK_on (data);
1371		885
1372	if (dataoffset < 0)	886	if (dataoffset < 0)
1373	dataoffset += svlen;	887	dataoffset += svlen;
1374		888
1375	if (dataoffset < 0 || dataoffset > svlen)	889	if (dataoffset < 0 || dataoffset > svlen)
1376	croak ("data offset outside of string");	890	croak ("dataoffset outside of data scalar");
1377		891
1378	if (ix == REQ_WRITE)	892	if (ix == EIO_WRITE)
1379	{	893	{
1380	/* write: check length and adjust. */	894	/* write: check length and adjust. */
1381	if (length < 0 || length + dataoffset > svlen)	895	if (!SvOK (length) || len + dataoffset > svlen)
1382	length = svlen - dataoffset;	896	len = svlen - dataoffset;
1383	}	897	}
1384	else	898	else
1385	{	899	{
1386	/* read: grow scalar as necessary */	900	/* read: check type and grow scalar as necessary */
		901	SvUPGRADE (data, SVt_PV);
1387	svptr = SvGROW (data, length + dataoffset);	902	svptr = SvGROW (data, len + dataoffset + 1);
1388	}	903	}
1389
1390	if (length < 0)
1391	croak ("length must not be negative");
1392		904
1393	{	905	{
1394	dREQ;	906	dREQ;
1395		907
1396	req->type = ix;	908	req->type = ix;
1397	req->fh = newSVsv (fh);	909	req->sv1 = newSVsv (fh);
1398	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	910	req->int1 = fd;
1399	: IoOFP (sv_2io (fh)));	911	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1400	req->offs = offset;
1401	req->size = length;	912	req->size = len;
1402	req->sv1 = SvREFCNT_inc (data);	913	req->sv2 = SvREFCNT_inc (data);
1403	req->ptr1 = (char *)svptr + dataoffset;	914	req->ptr2 = (char *)svptr + dataoffset;
1404	req->stroffset = dataoffset;	915	req->stroffset = dataoffset;
1405		916
1406	if (!SvREADONLY (data))	917	if (!SvREADONLY (data))
1407	{	918	{
1408	SvREADONLY_on (data);	919	SvREADONLY_on (data);
1409	req->flags |= FLAG_SV1_RO_OFF;	920	req->flags |= FLAG_SV2_RO_OFF;
1410	}	921	}
1411		922
1412	REQ_SEND;	923	REQ_SEND;
1413	}	924	}
1414	}	925	}
1415		926
1416	void	927	void
1417	aio_readlink (path,callback=&PL_sv_undef)	928	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1418	SV * path
1419	SV * callback
1420	PROTOTYPE: $$;$	929	PROTOTYPE: $$;$
1421	PPCODE:	930	PPCODE:
1422	{	931	{
1423	SV *data;	932	SV *data;
1424	dREQ;	933	dREQ;
1425		934
1426	data = newSV (NAME_MAX);
1427	SvPOK_on (data);
1428
1429	req->type = REQ_READLINK;	935	req->type = EIO_READLINK;
1430	req->fh = newSVsv (path);	936	req->sv1 = newSVsv (path);
1431	req->ptr2 = SvPVbyte_nolen (path);
1432	req->sv1 = data;
1433	req->ptr1 = SvPVbyte_nolen (data);	937	req->ptr1 = SvPVbyte_nolen (req->sv1);
1434		938
1435	REQ_SEND;	939	REQ_SEND;
1436	}	940	}
1437		941
1438	void	942	void
1439	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	943	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1440	SV * out_fh
1441	SV * in_fh
1442	UV in_offset
1443	UV length
1444	SV * callback
1445	PROTOTYPE: $$$$;$	944	PROTOTYPE: $$$$;$
1446	PPCODE:	945	PPCODE:
1447	{	946	{
		947	int ifd = s_fileno_croak (in_fh , 0);
		948	int ofd = s_fileno_croak (out_fh, 1);
1448	dREQ;	949	dREQ;
1449		950
1450	req->type = REQ_SENDFILE;	951	req->type = EIO_SENDFILE;
1451	req->fh = newSVsv (out_fh);	952	req->sv1 = newSVsv (out_fh);
1452	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	953	req->int1 = ofd;
1453	req->sv2 = newSVsv (in_fh);	954	req->sv2 = newSVsv (in_fh);
1454	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	955	req->int2 = ifd;
1455	req->offs = in_offset;	956	req->offs = in_offset;
1456	req->size = length;	957	req->size = length;
1457		958
1458	REQ_SEND;	959	REQ_SEND;
1459	}	960	}
1460		961
1461	void	962	void
1462	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	963	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1463	SV * fh
1464	UV offset
1465	IV length
1466	SV * callback
1467	PROTOTYPE: $$$;$	964	PROTOTYPE: $$$;$
1468	PPCODE:	965	PPCODE:
1469	{	966	{
		967	int fd = s_fileno_croak (fh, 0);
1470	dREQ;	968	dREQ;
1471		969
1472	req->type = REQ_READAHEAD;	970	req->type = EIO_READAHEAD;
1473	req->fh = newSVsv (fh);	971	req->sv1 = newSVsv (fh);
1474	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	972	req->int1 = fd;
1475	req->offs = offset;	973	req->offs = offset;
1476	req->size = length;	974	req->size = length;
1477		975
1478	REQ_SEND;	976	REQ_SEND;
1479	}	977	}
1480		978
1481	void	979	void
1482	aio_stat (fh_or_path,callback=&PL_sv_undef)	980	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1483	SV * fh_or_path
1484	SV * callback
1485	ALIAS:	981	ALIAS:
1486	aio_stat = REQ_STAT	982	aio_stat = EIO_STAT
1487	aio_lstat = REQ_LSTAT	983	aio_lstat = EIO_LSTAT
		984	aio_statvfs = EIO_STATVFS
1488	PPCODE:	985	PPCODE:
1489	{	986	{
1490	dREQ;	987	dREQ;
1491		988
1492	req->ptr2 = malloc (sizeof (Stat_t));	989	req->sv1 = newSVsv (fh_or_path);
1493	if (!req->ptr2)
1494	{
1495	req_free (req);
1496	croak ("out of memory during aio_req statdata allocation");
1497	}
1498		990
1499	req->flags |= FLAG_PTR2_FREE;	991	if (SvPOK (req->sv1))
1500
1501	if (SvPOK (fh_or_path))
1502	{	992	{
1503	req->type = ix;	993	req->type = ix;
1504	req->sv1 = newSVsv (fh_or_path);
1505	req->ptr1 = SvPVbyte_nolen (fh_or_path);	994	req->ptr1 = SvPVbyte_nolen (req->sv1);
1506	}	995	}
1507	else	996	else
1508	{	997	{
1509	req->type = REQ_FSTAT;	998	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1510	req->fh = newSVsv (fh_or_path);
1511	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	999	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1512	}	1000	}
1513		1001
1514	REQ_SEND;	1002	REQ_SEND;
1515	}	1003	}
1516		1004
1517	void	1005	void
		1006	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1007	PPCODE:
		1008	{
		1009	dREQ;
		1010
		1011	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1012	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1013	req->sv1 = newSVsv (fh_or_path);
		1014
		1015	if (SvPOK (req->sv1))
		1016	{
		1017	req->type = EIO_UTIME;
		1018	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1019	}
		1020	else
		1021	{
		1022	req->type = EIO_FUTIME;
		1023	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1024	}
		1025
		1026	REQ_SEND;
		1027	}
		1028
		1029	void
		1030	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1031	PPCODE:
		1032	{
		1033	dREQ;
		1034
		1035	req->sv1 = newSVsv (fh_or_path);
		1036	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1037
		1038	if (SvPOK (req->sv1))
		1039	{
		1040	req->type = EIO_TRUNCATE;
		1041	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1042	}
		1043	else
		1044	{
		1045	req->type = EIO_FTRUNCATE;
		1046	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1047	}
		1048
		1049	REQ_SEND;
		1050	}
		1051
		1052	void
		1053	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1054	ALIAS:
		1055	aio_chmod = EIO_CHMOD
		1056	aio_mkdir = EIO_MKDIR
		1057	PPCODE:
		1058	{
		1059	dREQ;
		1060
		1061	req->int2 = mode;
		1062	req->sv1 = newSVsv (fh_or_path);
		1063
		1064	if (SvPOK (req->sv1))
		1065	{
		1066	req->type = ix;
		1067	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1068	}
		1069	else
		1070	{
		1071	req->type = EIO_FCHMOD;
		1072	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1073	}
		1074
		1075	REQ_SEND;
		1076	}
		1077
		1078	void
		1079	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1080	PPCODE:
		1081	{
		1082	dREQ;
		1083
		1084	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1085	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1086	req->sv1 = newSVsv (fh_or_path);
		1087
		1088	if (SvPOK (req->sv1))
		1089	{
		1090	req->type = EIO_CHOWN;
		1091	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1092	}
		1093	else
		1094	{
		1095	req->type = EIO_FCHOWN;
		1096	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1097	}
		1098
		1099	REQ_SEND;
		1100	}
		1101
		1102	void
		1103	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1104	PPCODE:
		1105	{
		1106	dREQ;
		1107
		1108	req->type = EIO_READDIR;
		1109	req->sv1 = newSVsv (pathname);
		1110	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1111	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1112
		1113	if (flags & EIO_READDIR_DENTS)
		1114	req->int1 |= EIO_READDIR_CUSTOM2;
		1115
		1116	REQ_SEND;
		1117	}
		1118
		1119	void
1518	aio_unlink (pathname,callback=&PL_sv_undef)	1120	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1519	SV * pathname
1520	SV * callback
1521	ALIAS:	1121	ALIAS:
1522	aio_unlink = REQ_UNLINK	1122	aio_unlink = EIO_UNLINK
1523	aio_rmdir = REQ_RMDIR	1123	aio_rmdir = EIO_RMDIR
1524	aio_readdir = REQ_READDIR	1124	aio_readdir = EIO_READDIR
1525	PPCODE:	1125	PPCODE:
1526	{	1126	{
1527	dREQ;	1127	dREQ;
1528		1128
1529	req->type = ix;	1129	req->type = ix;
1530	req->sv1 = newSVsv (pathname);	1130	req->sv1 = newSVsv (pathname);
1531	req->ptr1 = SvPVbyte_nolen (pathname);	1131	req->ptr1 = SvPVbyte_nolen (req->sv1);
1532		1132
1533	REQ_SEND;	1133	REQ_SEND;
1534	}	1134	}
1535		1135
1536	void	1136	void
1537	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1137	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1538	SV * oldpath
1539	SV * newpath
1540	SV * callback
1541	ALIAS:	1138	ALIAS:
1542	aio_link = REQ_LINK	1139	aio_link = EIO_LINK
1543	aio_symlink = REQ_SYMLINK	1140	aio_symlink = EIO_SYMLINK
1544	aio_rename = REQ_RENAME	1141	aio_rename = EIO_RENAME
1545	PPCODE:	1142	PPCODE:
1546	{	1143	{
1547	dREQ;	1144	dREQ;
1548		1145
1549	req->type = ix;	1146	req->type = ix;
1550	req->fh = newSVsv (oldpath);	1147	req->sv1 = newSVsv (oldpath);
1551	req->ptr2 = SvPVbyte_nolen (req->fh);	1148	req->ptr1 = SvPVbyte_nolen (req->sv1);
1552	req->sv1 = newSVsv (newpath);	1149	req->sv2 = newSVsv (newpath);
1553	req->ptr1 = SvPVbyte_nolen (newpath);	1150	req->ptr2 = SvPVbyte_nolen (req->sv2);
1554		1151
1555	REQ_SEND;	1152	REQ_SEND;
1556	}	1153	}
1557		1154
1558	void	1155	void
1559	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1156	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1560	SV * pathname
1561	SV * callback
1562	UV mode
1563	UV dev
1564	PPCODE:	1157	PPCODE:
1565	{	1158	{
1566	dREQ;	1159	dREQ;
1567		1160
1568	req->type = REQ_MKNOD;	1161	req->type = EIO_MKNOD;
1569	req->sv1 = newSVsv (pathname);	1162	req->sv1 = newSVsv (pathname);
1570	req->ptr1 = SvPVbyte_nolen (pathname);	1163	req->ptr1 = SvPVbyte_nolen (req->sv1);
1571	req->mode = (mode_t)mode;	1164	req->int2 = (mode_t)mode;
1572	req->offs = dev;	1165	req->offs = dev;
1573		1166
1574	REQ_SEND;	1167	REQ_SEND;
1575	}	1168	}
1576		1169
1577	void	1170	void
		1171	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1172	ALIAS:
		1173	aio_mtouch = EIO_MTOUCH
		1174	aio_msync = EIO_MSYNC
		1175	PROTOTYPE: $$$$;$
		1176	PPCODE:
		1177	{
		1178	STRLEN svlen;
		1179	UV len = SvUV (length);
		1180	char *svptr = SvPVbyte (data, svlen);
		1181
		1182	if (offset < 0)
		1183	offset += svlen;
		1184
		1185	if (offset < 0 || offset > svlen)
		1186	croak ("offset outside of scalar");
		1187
		1188	if (!SvOK (length) || len + offset > svlen)
		1189	len = svlen - offset;
		1190
		1191	{
		1192	dREQ;
		1193
		1194	req->type = ix;
		1195	req->size = len;
		1196	req->sv2 = SvREFCNT_inc (data);
		1197	req->ptr2 = (char *)svptr + offset;
		1198	req->int1 = flags;
		1199
		1200	REQ_SEND;
		1201	}
		1202	}
		1203
		1204	void
1578	aio_busy (delay,callback=&PL_sv_undef)	1205	aio_busy (double delay, SV *callback=&PL_sv_undef)
1579	double delay
1580	SV * callback
1581	PPCODE:	1206	PPCODE:
1582	{	1207	{
1583	dREQ;	1208	dREQ;
1584		1209
1585	req->type = REQ_BUSY;	1210	req->type = EIO_BUSY;
1586	req->int1 = delay < 0. ? 0 : delay;	1211	req->nv1 = delay < 0. ? 0. : delay;
1587	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1588		1212
1589	REQ_SEND;	1213	REQ_SEND;
1590	}	1214	}
1591		1215
1592	void	1216	void
1593	aio_group (callback=&PL_sv_undef)	1217	aio_group (SV *callback=&PL_sv_undef)
1594	SV * callback
1595	PROTOTYPE: ;$	1218	PROTOTYPE: ;$
1596	PPCODE:	1219	PPCODE:
1597	{	1220	{
1598	dREQ;	1221	dREQ;
1599		1222
1600	req->type = REQ_GROUP;	1223	req->type = EIO_GROUP;
1601		1224
1602	req_send (req);	1225	req_submit (req);
1603	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1226	XPUSHs (req_sv (req, aio_grp_stash));
1604	}	1227	}
1605		1228
1606	void	1229	void
1607	aio_nop (callback=&PL_sv_undef)	1230	aio_nop (SV *callback=&PL_sv_undef)
1608	SV * callback	1231	ALIAS:
		1232	aio_nop = EIO_NOP
		1233	aio_sync = EIO_SYNC
1609	PPCODE:	1234	PPCODE:
1610	{	1235	{
1611	dREQ;	1236	dREQ;
1612		1237
1613	req->type = REQ_NOP;	1238	req->type = ix;
1614		1239
1615	REQ_SEND;	1240	REQ_SEND;
1616	}	1241	}
1617		1242
1618	int	1243	int
1619	aioreq_pri (int pri = 0)	1244	aioreq_pri (int pri = 0)
1620	PROTOTYPE: ;$	1245	PROTOTYPE: ;$
1621	CODE:	1246	CODE:
1622	RETVAL = next_pri - PRI_BIAS;	1247	RETVAL = next_pri;
1623	if (items > 0)	1248	if (items > 0)
1624	{	1249	{
1625	if (pri < PRI_MIN) pri = PRI_MIN;	1250	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1626	if (pri > PRI_MAX) pri = PRI_MAX;	1251	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1627	next_pri = pri + PRI_BIAS;	1252	next_pri = pri;
1628	}	1253	}
1629	OUTPUT:	1254	OUTPUT:
1630	RETVAL	1255	RETVAL
1631		1256
1632	void	1257	void
1633	aioreq_nice (int nice = 0)	1258	aioreq_nice (int nice = 0)
1634	CODE:	1259	CODE:
1635	nice = next_pri - nice;	1260	nice = next_pri - nice;
1636	if (nice < PRI_MIN) nice = PRI_MIN;	1261	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1637	if (nice > PRI_MAX) nice = PRI_MAX;	1262	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1638	next_pri = nice + PRI_BIAS;	1263	next_pri = nice;
1639		1264
1640	void	1265	void
1641	flush ()	1266	flush ()
1642	PROTOTYPE:	1267	PROTOTYPE:
1643	CODE:	1268	CODE:
1644	while (nreqs)	1269	while (eio_nreqs ())
1645	{	1270	{
1646	poll_wait ();	1271	poll_wait ();
1647	poll_cb (0);	1272	poll_cb ();
1648	}	1273	}
1649		1274
1650	void	1275	int
1651	poll()	1276	poll()
1652	PROTOTYPE:	1277	PROTOTYPE:
1653	CODE:	1278	CODE:
1654	if (nreqs)
1655	{
1656	poll_wait ();	1279	poll_wait ();
1657	poll_cb (0);	1280	RETVAL = poll_cb ();
1658	}	1281	OUTPUT:
		1282	RETVAL
1659		1283
1660	int	1284	int
1661	poll_fileno()	1285	poll_fileno()
1662	PROTOTYPE:	1286	PROTOTYPE:
1663	CODE:	1287	CODE:
1664	RETVAL = respipe [0];	1288	RETVAL = s_epipe_fd (&respipe);
1665	OUTPUT:	1289	OUTPUT:
1666	RETVAL	1290	RETVAL
1667		1291
1668	int	1292	int
1669	poll_cb(...)	1293	poll_cb(...)
…		…
1675		1299
1676	void	1300	void
1677	poll_wait()	1301	poll_wait()
1678	PROTOTYPE:	1302	PROTOTYPE:
1679	CODE:	1303	CODE:
1680	if (nreqs)
1681	poll_wait ();	1304	poll_wait ();
1682		1305
1683	int	1306	int
1684	nreqs()	1307	nreqs()
1685	PROTOTYPE:	1308	PROTOTYPE:
1686	CODE:	1309	CODE:
1687	RETVAL = nreqs;	1310	RETVAL = eio_nreqs ();
1688	OUTPUT:	1311	OUTPUT:
1689	RETVAL	1312	RETVAL
1690		1313
1691	int	1314	int
1692	nready()	1315	nready()
1693	PROTOTYPE:	1316	PROTOTYPE:
1694	CODE:	1317	CODE:
1695	RETVAL = get_nready ();	1318	RETVAL = eio_nready ();
1696	OUTPUT:	1319	OUTPUT:
1697	RETVAL	1320	RETVAL
1698		1321
1699	int	1322	int
1700	npending()	1323	npending()
1701	PROTOTYPE:	1324	PROTOTYPE:
1702	CODE:	1325	CODE:
1703	RETVAL = get_npending ();	1326	RETVAL = eio_npending ();
1704	OUTPUT:	1327	OUTPUT:
1705	RETVAL	1328	RETVAL
1706		1329
1707	int	1330	int
1708	nthreads()	1331	nthreads()
1709	PROTOTYPE:	1332	PROTOTYPE:
1710	CODE:	1333	CODE:
1711	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1334	RETVAL = eio_nthreads ();
1712	RETVAL = started;
1713	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1714	OUTPUT:	1335	OUTPUT:
1715	RETVAL	1336	RETVAL
1716		1337
		1338	int
		1339	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1340	PROTOTYPE: $$$$
		1341	CODE:
		1342	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1343	RETVAL = posix_fadvise (fh, offset, length, advice);
		1344	#else
		1345	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1346	#endif
		1347	OUTPUT:
		1348	RETVAL
		1349
		1350	ssize_t
		1351	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1352	PROTOTYPE: $$$$
		1353	CODE:
		1354	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1355	OUTPUT:
		1356	RETVAL
		1357
		1358	void
		1359	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1360	PROTOTYPE: $$$$$;$
		1361	PPCODE:
		1362	sv_unmagic (scalar, MMAP_MAGIC);
		1363	{
		1364	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1365	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1366	if (addr == (void *)-1)
		1367	XSRETURN_NO;
		1368
		1369	/* we store the length in mg_obj, as namlen is I32 :/ */
		1370	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1371	->mg_obj = (SV *)length;
		1372
		1373	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1374	if (!(prot & PROT_WRITE))
		1375	SvREADONLY_on (scalar);
		1376
		1377	SvPVX (scalar) = (char *)addr;
		1378	SvCUR_set (scalar, length);
		1379	SvLEN_set (scalar, 0);
		1380	SvPOK_only (scalar);
		1381
		1382	XSRETURN_YES;
		1383	}
		1384
		1385	void
		1386	munmap (SV *scalar)
		1387	PROTOTYPE: $
		1388	CODE:
		1389	sv_unmagic (scalar, MMAP_MAGIC);
		1390
		1391	int
		1392	mlockall (int flags)
		1393	PROTOTYPE: $
		1394	CODE:
		1395	#if _POSIX_MEMLOCK
		1396	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1397	extern int mallopt (int, int);
		1398	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1399	#endif
		1400	mlockall (flags);
		1401	#else
		1402	RETVAL = -1;
		1403	errno = ENOSYS;
		1404	#endif
		1405	OUTPUT:
		1406	RETVAL
		1407
		1408	int
		1409	munlockall ()
		1410	PROTOTYPE:
		1411	CODE:
		1412	#if _POSIX_MEMLOCK
		1413	munlockall ();
		1414	#else
		1415	RETVAL = -1;
		1416	errno = ENOSYS;
		1417	#endif
		1418	OUTPUT:
		1419	RETVAL
		1420
		1421	void _on_next_submit (SV *cb)
		1422	CODE:
		1423	SvREFCNT_dec (on_next_submit);
		1424	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1425
1717	PROTOTYPES: DISABLE	1426	PROTOTYPES: DISABLE
1718		1427
1719	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1428	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1720		1429
1721	void	1430	void
1722	cancel (aio_req_ornot req)	1431	cancel (aio_req_ornot req)
1723	CODE:	1432	CODE:
1724	req_cancel (req);	1433	eio_cancel (req);
1725		1434
1726	void	1435	void
1727	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1436	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1728	CODE:	1437	PPCODE:
		1438	{
		1439	if (GIMME_V != G_VOID)
		1440	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1441
		1442	if (items > 1)
		1443	{
		1444	SV *cb_cv =get_cb (callback);
		1445
1729	SvREFCNT_dec (req->callback);	1446	SvREFCNT_dec (req->callback);
1730	req->callback = newSVsv (callback);	1447	req->callback = SvREFCNT_inc (cb_cv);
		1448	}
		1449	}
1731		1450
1732	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1451	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1733		1452
1734	void	1453	void
1735	add (aio_req grp, ...)	1454	add (aio_req grp, ...)
1736	PPCODE:	1455	PPCODE:
1737	{	1456	{
1738	int i;	1457	int i;
1739	aio_req req;
1740		1458
1741	if (grp->int1 == 2)	1459	if (grp->int1 == 2)
1742	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1460	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1743		1461
1744	for (i = 1; i < items; ++i )	1462	for (i = 1; i < items; ++i )
1745	{	1463	{
		1464	aio_req req;
		1465
1746	if (GIMME_V != G_VOID)	1466	if (GIMME_V != G_VOID)
1747	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1467	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1748		1468
1749	req = SvAIO_REQ (ST (i));	1469	req = SvAIO_REQ (ST (i));
1750		1470
1751	if (req)	1471	if (req)
1752	{	1472	eio_grp_add (grp, req);
1753	++grp->size;
1754	req->grp = grp;
1755
1756	req->grp_prev = 0;
1757	req->grp_next = grp->grp_first;
1758
1759	if (grp->grp_first)
1760	grp->grp_first->grp_prev = req;
1761
1762	grp->grp_first = req;
1763	}
1764	}	1473	}
1765	}	1474	}
1766		1475
1767	void	1476	void
1768	cancel_subs (aio_req_ornot req)	1477	cancel_subs (aio_req_ornot req)
…		…
1777	AV *av;	1486	AV *av;
1778		1487
1779	grp->errorno = errno;	1488	grp->errorno = errno;
1780		1489
1781	av = newAV ();	1490	av = newAV ();
		1491	av_extend (av, items - 1);
1782		1492
1783	for (i = 1; i < items; ++i )	1493	for (i = 1; i < items; ++i )
1784	av_push (av, newSVsv (ST (i)));	1494	av_push (av, newSVsv (ST (i)));
1785		1495
1786	SvREFCNT_dec (grp->sv1);	1496	SvREFCNT_dec (grp->sv1);
…		…
1793	grp->errorno = errorno;	1503	grp->errorno = errorno;
1794		1504
1795	void	1505	void
1796	limit (aio_req grp, int limit)	1506	limit (aio_req grp, int limit)
1797	CODE:	1507	CODE:
1798	grp->int2 = limit;	1508	eio_grp_limit (grp, limit);
1799	aio_grp_feed (grp);
1800		1509
1801	void	1510	void
1802	feed (aio_req grp, SV *callback=&PL_sv_undef)	1511	feed (aio_req grp, SV *callback=&PL_sv_undef)
1803	CODE:	1512	CODE:
1804	{	1513	{
1805	SvREFCNT_dec (grp->sv2);	1514	SvREFCNT_dec (grp->sv2);
1806	grp->sv2 = newSVsv (callback);	1515	grp->sv2 = newSVsv (callback);
		1516	grp->feed = aio_grp_feed;
1807		1517
1808	if (grp->int2 <= 0)	1518	if (grp->int2 <= 0)
1809	grp->int2 = 2;	1519	grp->int2 = 2;
1810		1520
1811	aio_grp_feed (grp);	1521	eio_grp_limit (grp, grp->int2);
1812	}	1522	}
1813		1523

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