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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.84 by root, Sat Oct 28 01:24:19 2006 UTC vs.
Revision 1.169 by root, Wed Aug 4 16:06:54 2010 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
27	#include <limits.h>	17	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	18	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	19	#include <sched.h>
32		20
33	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
34	# if __linux
35	# include <sys/sendfile.h>	22	# include <sys/mman.h>
36	# elif __freebsd	23	#endif
37	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
38	# include <sys/uio.h>	68	# include <sys/time.h>
39	# elif __hpux
40	# include <sys/socket.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#ifndef POSIX_MADV_NORMAL
		146	# define POSIX_MADV_NORMAL 0
		147	# define NO_MADVISE 1
		148	#endif
		149	#ifndef POSIX_MADV_SEQUENTIAL
		150	# define POSIX_MADV_SEQUENTIAL 0
		151	#endif
		152	#ifndef POSIX_MADV_RANDOM
		153	# define POSIX_MADV_RANDOM 0
		154	#endif
		155	#ifndef POSIX_MADV_WILLNEED
		156	# define POSIX_MADV_WILLNEED 0
		157	#endif
		158	#ifndef POSIX_MADV_DONTNEED
		159	# define POSIX_MADV_DONTNEED 0
		160	#endif
		161
		162	#ifndef ST_NODEV
		163	# define ST_NODEV 0
		164	#endif
		165	#ifndef ST_NOEXEC
		166	# define ST_NOEXEC 0
		167	#endif
		168	#ifndef ST_SYNCHRONOUS
		169	# define ST_SYNCHRONOUS 0
		170	#endif
		171	#ifndef ST_MANDLOCK
		172	# define ST_MANDLOCK 0
		173	#endif
		174	#ifndef ST_WRITE
		175	# define ST_WRITE 0
		176	#endif
		177	#ifndef ST_APPEND
		178	# define ST_APPEND 0
		179	#endif
		180	#ifndef ST_IMMUTABLE
		181	# define ST_IMMUTABLE 0
		182	#endif
		183	#ifndef ST_NOATIME
		184	# define ST_NOATIME 0
		185	#endif
		186	#ifndef ST_NODIRATIME
		187	# define ST_NODIRATIME 0
		188	#endif
		189	#ifndef ST_RELATIME
		190	# define ST_RELATIME 0
		191	#endif
		192
		193	#ifndef MCL_CURRENT
		194	# define MCL_CURRENT 0
		195	#endif
		196	#ifndef MCL_FUTURE
		197	# define MCL_FUTURE 0
		198	#endif
		199
		200	#ifndef MAP_ANONYMOUS
		201	# ifdef MAP_ANON
		202	# define MAP_ANONYMOUS MAP_ANON
43	# else	203	# else
44	# error sendfile support requested but not available	204	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	205	# endif
46	#endif	206	#endif
47		207	#ifndef MAP_HUGETLB
48	/* number of seconds after which idle threads exit */	208	# 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 WORDREAD_UNSAFE
74	# if __i386 || __x86_64
75	# define WORDREAD_UNSAFE 0
76	# else
77	# define WORDREAD_UNSAFE 1
78	# endif	209	#endif
		210	#ifndef MAP_LOCKED
		211	# define MAP_LOCKED 0
79	#endif	212	#endif
		213	#ifndef MAP_NORESERVE
		214	# define MAP_NORESERVE 0
		215	#endif
		216	#ifndef MAP_POPULATE
		217	# define MAP_POPULATE 0
		218	#endif
		219	#ifndef MAP_NONBLOCK
		220	# define MAP_NONBLOCK 0
		221	#endif
80		222
81	/* buffer size for various temporary buffers */	223	#ifndef PAGESIZE
82	#define AIO_BUFSIZE 65536	224	# define PAGESIZE sysconf (_SC_PAGESIZE)
		225	#endif
83		226
84	#define dBUF \	227	static int req_invoke (eio_req *req);
85	char *aio_buf; \	228	#define EIO_FINISH(req) req_invoke (req)
86	LOCK (wrklock); \	229	static void req_destroy (eio_req *grp);
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	230	#define EIO_DESTROY(req) req_destroy (req)
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91		231
92	enum {	232	enum {
93	REQ_QUIT,	233	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
94	REQ_OPEN, REQ_CLOSE,
95	REQ_READ, REQ_WRITE, REQ_READAHEAD,
96	REQ_SENDFILE,
97	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
98	REQ_FSYNC, REQ_FDATASYNC,
99	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
100	REQ_MKNOD, REQ_READDIR,
101	REQ_LINK, REQ_SYMLINK,
102	REQ_GROUP, REQ_NOP,
103	REQ_BUSY,
104	};	234	};
105		235
106	#define AIO_REQ_KLASS "IO::AIO::REQ"	236	#include "libeio/eio.c"
107	#define AIO_GRP_KLASS "IO::AIO::GRP"
108		237
109	typedef struct aio_cb
110	{
111	struct aio_cb *volatile next;
112
113	SV *data, *callback;
114	SV *fh, *fh2;
115	void *dataptr, *data2ptr;
116	Stat_t *statdata;
117	off_t offset;
118	size_t length;
119	ssize_t result;
120
121	STRLEN dataoffset;
122	int type;
123	int fd, fd2;
124	int errorno;
125	mode_t mode; /* open */
126
127	unsigned char flags;
128	unsigned char pri;
129
130	SV *self; /* the perl counterpart of this request, if any */
131	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
132	} aio_cb;
133
134	enum {
135	FLAG_CANCELLED = 0x01,
136	};
137
138	typedef aio_cb *aio_req;	238	typedef eio_req *aio_req;
139	typedef aio_cb *aio_req_ornot;	239	typedef eio_req *aio_req_ornot;
140		240
141	enum {	241	static SV *on_next_submit;
142	PRI_MIN = -4,	242	static int next_pri = EIO_PRI_DEFAULT;
143	PRI_MAX = 4,	243	static int max_outstanding;
144		244
145	DEFAULT_PRI = 0,	245	static s_epipe respipe;
146	PRI_BIAS = -PRI_MIN,
147	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
148	};
149		246
150	static int next_pri = DEFAULT_PRI + PRI_BIAS;
151
152	static unsigned int started, idle, wanted;
153
154	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
155	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
156	#else
157	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
158	#endif
159
160	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
161	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
162
163	/* worker threads management */
164	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
165
166	typedef struct worker {
167	/* locked by wrklock */
168	struct worker *prev, *next;
169
170	pthread_t tid;
171
172	/* locked by reslock, reqlock or wrklock */
173	aio_req req; /* currently processed request */
174	void *dbuf;
175	DIR *dirp;
176	} worker;
177
178	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
179
180	static void worker_clear (worker *wrk)
181	{
182	if (wrk->dirp)
183	{
184	closedir (wrk->dirp);
185	wrk->dirp = 0;
186	}
187
188	if (wrk->dbuf)
189	{
190	free (wrk->dbuf);
191	wrk->dbuf = 0;
192	}
193	}
194
195	static void worker_free (worker *wrk)
196	{
197	wrk->next->prev = wrk->prev;
198	wrk->prev->next = wrk->next;
199
200	free (wrk);
201	}
202
203	static volatile unsigned int nreqs, nready, npending;
204	static volatile unsigned int max_idle = 4;
205	static volatile unsigned int max_outstanding = 0xffffffff;
206	static int respipe [2];
207
208	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
209	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
210	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
211
212	#if WORDREAD_UNSAFE
213
214	static unsigned int get_nready ()
215	{
216	unsigned int retval;
217
218	LOCK (reqlock);
219	retval = nready;
220	UNLOCK (reqlock);
221
222	return retval;
223	}
224
225	static unsigned int get_npending ()
226	{
227	unsigned int retval;
228
229	LOCK (reslock);
230	retval = npending;
231	UNLOCK (reslock);
232
233	return retval;
234	}
235
236	#else
237
238	# define get_nready() nready
239	# define get_npending() npending
240
241	#endif
242
243	/*
244	* a somewhat faster data structure might be nice, but
245	* with 8 priorities this actually needs <20 insns
246	* per shift, the most expensive operation.
247	*/
248	typedef struct {
249	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
250	int size;
251	} reqq;
252
253	static reqq req_queue;
254	static reqq res_queue;
255
256	int reqq_push (reqq *q, aio_req req)
257	{
258	int pri = req->pri;
259	req->next = 0;
260
261	if (q->qe[pri])
262	{
263	q->qe[pri]->next = req;
264	q->qe[pri] = req;
265	}
266	else
267	q->qe[pri] = q->qs[pri] = req;
268
269	return q->size++;
270	}
271
272	aio_req reqq_shift (reqq *q)
273	{
274	int pri;
275
276	if (!q->size)
277	return 0;
278
279	--q->size;
280
281	for (pri = NUM_PRI; pri--; )
282	{
283	aio_req req = q->qs[pri];
284
285	if (req)
286	{
287	if (!(q->qs[pri] = req->next))
288	q->qe[pri] = 0;
289
290	return req;
291	}
292	}
293
294	abort ();
295	}
296
297	static int poll_cb (int max);
298	static void req_invoke (aio_req req);
299	static void req_free (aio_req req);	247	static void req_destroy (aio_req req);
300	static void req_cancel (aio_req req);	248	static void req_cancel (aio_req req);
301		249
		250	static void want_poll (void)
		251	{
		252	/* write a dummy byte to the pipe so fh becomes ready */
		253	s_epipe_signal (&respipe);
		254	}
		255
		256	static void done_poll (void)
		257	{
		258	/* read any signals sent by the worker threads */
		259	s_epipe_drain (&respipe);
		260	}
		261
302	/* must be called at most once */	262	/* must be called at most once */
303	static SV *req_sv (aio_req req, const char *klass)	263	static SV *req_sv (aio_req req, HV *stash)
304	{	264	{
305	if (!req->self)	265	if (!req->self)
306	{	266	{
307	req->self = (SV *)newHV ();	267	req->self = (SV *)newHV ();
308	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	268	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
309	}	269	}
310		270
311	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	271	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
312	}	272	}
313		273
314	static aio_req SvAIO_REQ (SV *sv)	274	static aio_req SvAIO_REQ (SV *sv)
315	{	275	{
316	MAGIC *mg;	276	MAGIC *mg;
317		277
318	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	278	if (!SvROK (sv)
		279	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		280	&& SvSTASH (SvRV (sv)) != aio_req_stash
		281	&& !sv_derived_from (sv, "IO::AIO::REQ")))
319	croak ("object of class " AIO_REQ_KLASS " expected");	282	croak ("object of class IO::AIO::REQ expected");
320		283
321	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	284	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
322		285
323	return mg ? (aio_req)mg->mg_ptr : 0;	286	return mg ? (aio_req)mg->mg_ptr : 0;
324	}	287	}
325		288
326	static void aio_grp_feed (aio_req grp)	289	static void aio_grp_feed (aio_req grp)
327	{	290	{
328	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	291	if (grp->sv2 && SvOK (grp->sv2))
329	{	292	{
330	int old_len = grp->length;
331
332	if (grp->fh2 && SvOK (grp->fh2))
333	{
334	dSP;	293	dSP;
335		294
336	ENTER;	295	ENTER;
337	SAVETMPS;	296	SAVETMPS;
338	PUSHMARK (SP);	297	PUSHMARK (SP);
339	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	298	XPUSHs (req_sv (grp, aio_grp_stash));
340	PUTBACK;	299	PUTBACK;
341	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	300	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
342	SPAGAIN;	301	SPAGAIN;
343	FREETMPS;	302	FREETMPS;
344	LEAVE;	303	LEAVE;
345	}
346
347	/* stop if no progress has been made */
348	if (old_len == grp->length)
349	{
350	SvREFCNT_dec (grp->fh2);
351	grp->fh2 = 0;
352	break;
353	}
354	}	304	}
355	}	305	}
356		306
357	static void aio_grp_dec (aio_req grp)	307	static void req_submit (eio_req *req)
358	{	308	{
359	--grp->length;	309	eio_submit (req);
360		310
361	/* call feeder, if applicable */	311	if (expect_false (on_next_submit))
362	aio_grp_feed (grp);
363
364	/* finish, if done */
365	if (!grp->length && grp->fd)
366	{	312	{
367	req_invoke (grp);	313	dSP;
368	req_free (grp);	314	SV *cb = sv_2mortal (on_next_submit);
		315
		316	on_next_submit = 0;
		317
		318	PUSHMARK (SP);
		319	PUTBACK;
		320	call_sv (cb, G_DISCARD | G_EVAL);
369	}	321	}
370	}	322	}
371		323
372	static void req_invoke (aio_req req)	324	static int req_invoke (eio_req *req)
373	{	325	{
374	dSP;	326	if (req->flags & FLAG_SV2_RO_OFF)
		327	SvREADONLY_off (req->sv2);
375		328
376	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	329	if (!EIO_CANCELLED (req) && req->callback)
377	{	330	{
		331	dSP;
		332	static SV *sv_result_cache; /* caches the result integer SV */
		333	SV *sv_result;
		334
378	ENTER;	335	ENTER;
379	SAVETMPS;	336	SAVETMPS;
380	PUSHMARK (SP);	337	PUSHMARK (SP);
381	EXTEND (SP, 1);	338	EXTEND (SP, 1);
382		339
		340	/* do not recreate the result IV from scratch each time */
		341	if (expect_true (sv_result_cache))
		342	{
		343	sv_result = sv_result_cache; sv_result_cache = 0;
		344	SvIV_set (sv_result, req->result);
		345	}
		346	else
		347	{
		348	sv_result = newSViv (req->result);
		349	SvREADONLY_on (sv_result);
		350	}
		351
383	switch (req->type)	352	switch (req->type)
384	{	353	{
385	case REQ_READDIR:	354	case EIO_READDIR:
386	{	355	{
387	SV *rv = &PL_sv_undef;	356	SV *rv = &PL_sv_undef;
388		357
389	if (req->result >= 0)	358	if (req->result >= 0)
390	{	359	{
391	int i;	360	int i;
392	char *buf = req->data2ptr;	361	char *names = (char *)req->ptr2;
		362	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
393	AV *av = newAV ();	363	AV *av = newAV ();
394		364
395	av_extend (av, req->result - 1);	365	av_extend (av, req->result - 1);
396		366
397	for (i = 0; i < req->result; ++i)	367	for (i = 0; i < req->result; ++i)
398	{	368	{
399	SV *sv = newSVpv (buf, 0);	369	if (req->int1 & EIO_READDIR_DENTS)
		370	{
		371	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
400		372
		373	if (req->int1 & EIO_READDIR_CUSTOM2)
		374	{
		375	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		376	AV *avent = newAV ();
		377
		378	av_extend (avent, 2);
		379
		380	if (!sv_type [ent->type])
		381	{
		382	sv_type [ent->type] = newSViv (ent->type);
		383	SvREADONLY_on (sv_type [ent->type]);
		384	}
		385
		386	av_store (avent, 0, namesv);
		387	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		388	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		389
		390	av_store (av, i, newRV_noinc ((SV *)avent));
		391	}
		392	else
401	av_store (av, i, sv);	393	av_store (av, i, namesv);
		394
		395	++ent;
		396	}
		397	else
		398	{
		399	SV *name = newSVpv (names, 0);
		400	av_store (av, i, name);
402	buf += SvCUR (sv) + 1;	401	names += SvCUR (name) + 1;
		402	}
403	}	403	}
404		404
405	rv = sv_2mortal (newRV_noinc ((SV *)av));	405	rv = sv_2mortal (newRV_noinc ((SV *)av));
406	}	406	}
407		407
408	PUSHs (rv);	408	PUSHs (rv);
		409
		410	if (req->int1 & EIO_READDIR_CUSTOM1)
		411	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
409	}	412	}
410	break;	413	break;
411		414
412	case REQ_OPEN:	415	case EIO_OPEN:
413	{	416	{
414	/* convert fd to fh */	417	/* convert fd to fh */
415	SV *fh;	418	SV *fh = &PL_sv_undef;
416		419
417	PUSHs (sv_2mortal (newSViv (req->result)));	420	if (req->result >= 0)
418	PUTBACK;	421	{
419	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	422	GV *gv = (GV *)sv_newmortal ();
420	SPAGAIN;	423	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		424	char sym [64];
		425	int symlen;
		426
		427	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		428	gv_init (gv, aio_stash, sym, symlen, 0);
421		429
422	fh = SvREFCNT_inc (POPs);	430	symlen = snprintf (
		431	sym,
		432	sizeof (sym),
		433	"%s&=%d",
		434	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		435	(int)req->result
		436	);
423		437
		438	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		439	fh = (SV *)gv;
		440	}
		441
424	PUSHMARK (SP);	442	PUSHs (fh);
425	XPUSHs (sv_2mortal (fh));
426	}	443	}
427	break;	444	break;
428		445
		446	case EIO_STATVFS:
		447	case EIO_FSTATVFS:
		448	{
		449	SV *rv = &PL_sv_undef;
		450
		451	if (req->result >= 0)
		452	{
		453	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		454	HV *hv = newHV ();
		455
		456	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		457
		458	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		459	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		460	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		461	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		462	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		463	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		464	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		465	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		466	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		467	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		468	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		469	}
		470
		471	PUSHs (rv);
		472	}
		473
		474	break;
		475
429	case REQ_GROUP:	476	case EIO_GROUP:
430	req->fd = 2; /* mark group as finished */	477	req->int1 = 2; /* mark group as finished */
431		478
432	if (req->data)	479	if (req->sv1)
433	{	480	{
434	int i;	481	int i;
435	AV *av = (AV *)req->data;	482	AV *av = (AV *)req->sv1;
436		483
437	EXTEND (SP, AvFILL (av) + 1);	484	EXTEND (SP, AvFILL (av) + 1);
438	for (i = 0; i <= AvFILL (av); ++i)	485	for (i = 0; i <= AvFILL (av); ++i)
439	PUSHs (*av_fetch (av, i, 0));	486	PUSHs (*av_fetch (av, i, 0));
440	}	487	}
441	break;	488	break;
442		489
443	case REQ_NOP:	490	case EIO_NOP:
444	case REQ_BUSY:	491	case EIO_BUSY:
445	break;	492	break;
446		493
		494	case EIO_READLINK:
		495	if (req->result > 0)
		496	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		497	break;
		498
		499	case EIO_STAT:
		500	case EIO_LSTAT:
		501	case EIO_FSTAT:
		502	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		503	PL_laststatval = req->result;
		504	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		505	PUSHs (sv_result);
		506	break;
		507
		508	case EIO_READ:
		509	{
		510	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		511	*SvEND (req->sv2) = 0;
		512	SvPOK_only (req->sv2);
		513	SvSETMAGIC (req->sv2);
		514	PUSHs (sv_result);
		515	}
		516	break;
		517
		518	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		519	if (req->result > 0)
		520	SvIV_set (sv_result, 0);
		521	/* FALLTHROUGH */
		522
447	default:	523	default:
448	PUSHs (sv_2mortal (newSViv (req->result)));	524	PUSHs (sv_result);
449	break;	525	break;
450	}	526	}
451		527
452	errno = req->errorno;	528	errno = req->errorno;
453		529
454	PUTBACK;	530	PUTBACK;
455	call_sv (req->callback, G_VOID | G_EVAL);	531	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
456	SPAGAIN;	532	SPAGAIN;
		533
		534	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		535	SvREFCNT_dec (sv_result);
		536	else
		537	sv_result_cache = sv_result;
457		538
458	FREETMPS;	539	FREETMPS;
459	LEAVE;	540	LEAVE;
		541
		542	PUTBACK;
460	}	543	}
461		544
462	if (req->grp)	545	return !!SvTRUE (ERRSV);
463	{
464	aio_req grp = req->grp;
465
466	/* unlink request */
467	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
468	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
469
470	if (grp->grp_first == req)
471	grp->grp_first = req->grp_next;
472
473	aio_grp_dec (grp);
474	}
475
476	if (SvTRUE (ERRSV))
477	{
478	req_free (req);
479	croak (0);
480	}
481	}	546	}
482		547
483	static void req_free (aio_req req)	548	static void req_destroy (aio_req req)
484	{	549	{
485	if (req->self)	550	if (req->self)
486	{	551	{
487	sv_unmagic (req->self, PERL_MAGIC_ext);	552	sv_unmagic (req->self, PERL_MAGIC_ext);
488	SvREFCNT_dec (req->self);	553	SvREFCNT_dec (req->self);
489	}	554	}
490		555
491	SvREFCNT_dec (req->data);
492	SvREFCNT_dec (req->fh);	556	SvREFCNT_dec (req->sv1);
493	SvREFCNT_dec (req->fh2);	557	SvREFCNT_dec (req->sv2);
494	SvREFCNT_dec (req->callback);	558	SvREFCNT_dec (req->callback);
495	Safefree (req->statdata);
496
497	if (req->type == REQ_READDIR)
498	free (req->data2ptr);
499		559
500	Safefree (req);	560	Safefree (req);
501	}	561	}
502		562
503	static void req_cancel_subs (aio_req grp)	563	static void req_cancel_subs (aio_req grp)
504	{	564	{
505	aio_req sub;	565	aio_req sub;
506		566
507	if (grp->type != REQ_GROUP)	567	if (grp->type != EIO_GROUP)
508	return;	568	return;
509		569
510	SvREFCNT_dec (grp->fh2);	570	SvREFCNT_dec (grp->sv2);
511	grp->fh2 = 0;	571	grp->sv2 = 0;
512		572
513	for (sub = grp->grp_first; sub; sub = sub->grp_next)	573	eio_grp_cancel (grp);
514	req_cancel (sub);
515	}	574	}
516		575
517	static void req_cancel (aio_req req)	576	static void
		577	create_respipe (void)
518	{	578	{
519	req->flags |= FLAG_CANCELLED;	579	if (s_epipe_renew (&respipe))
520		580	croak ("IO::AIO: unable to initialize result pipe");
521	req_cancel_subs (req);
522	}	581	}
523		582
524	static void *aio_proc(void *arg);
525
526	static void start_thread (void)
527	{
528	sigset_t fullsigset, oldsigset;
529	pthread_attr_t attr;
530
531	worker *wrk = calloc (1, sizeof (worker));
532
533	if (!wrk)
534	croak ("unable to allocate worker thread data");
535
536	pthread_attr_init (&attr);
537	pthread_attr_setstacksize (&attr, STACKSIZE);
538	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
539	#ifdef PTHREAD_SCOPE_PROCESS
540	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
541	#endif
542
543	sigfillset (&fullsigset);
544
545	LOCK (wrklock);
546	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
547
548	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
549	{
550	wrk->prev = &wrk_first;
551	wrk->next = wrk_first.next;
552	wrk_first.next->prev = wrk;
553	wrk_first.next = wrk;
554	++started;
555	}
556	else
557	free (wrk);
558
559	sigprocmask (SIG_SETMASK, &oldsigset, 0);
560	UNLOCK (wrklock);
561	}
562
563	static void maybe_start_thread ()
564	{
565	if (started >= wanted)
566	return;
567
568	/* todo: maybe use idle here, but might be less exact */
569	if ((int)nready <= (int)started - (int)(nreqs - get_nready () - get_npending ()))
570	return;
571
572	start_thread ();
573	}
574
575	static void req_send (aio_req req)
576	{
577	++nreqs;
578
579	LOCK (reqlock);
580	++nready;
581	reqq_push (&req_queue, req);
582	pthread_cond_signal (&reqwait);
583	UNLOCK (reqlock);
584
585	maybe_start_thread ();
586	}
587
588	static void end_thread (void)
589	{
590	aio_req req;
591
592	Newz (0, req, 1, aio_cb);
593
594	req->type = REQ_QUIT;
595	req->pri = PRI_MAX + PRI_BIAS;
596
597	LOCK (reqlock);
598	reqq_push (&req_queue, req);
599	pthread_cond_signal (&reqwait);
600	UNLOCK (reqlock);
601
602	LOCK (wrklock);
603	--started;
604	UNLOCK (wrklock);
605	}
606
607	static void min_parallel (int nthreads)
608	{
609	if (wanted < nthreads)
610	wanted = nthreads;
611	}
612
613	static void max_parallel (int nthreads)
614	{
615	if (wanted > nthreads)
616	wanted = nthreads;
617
618	while (started > wanted)
619	end_thread ();
620	}
621
622	static void poll_wait ()	583	static void poll_wait (void)
623	{	584	{
624	fd_set rfd;
625
626	while (nreqs)	585	while (eio_nreqs ())
627	{	586	{
628	int size;	587	int size;
629	if (WORDREAD_UNSAFE) LOCK (reslock);	588
		589	X_LOCK (reslock);
630	size = res_queue.size;	590	size = res_queue.size;
631	if (WORDREAD_UNSAFE) UNLOCK (reslock);	591	X_UNLOCK (reslock);
632		592
633	if (size)	593	if (size)
634	return;	594	return;
635		595
636	maybe_start_thread ();	596	etp_maybe_start_thread ();
637		597
638	FD_ZERO(&rfd);	598	s_epipe_wait (&respipe);
639	FD_SET(respipe [0], &rfd);
640
641	select (respipe [0] + 1, &rfd, 0, 0, 0);
642	}	599	}
643	}	600	}
644		601
645	static int poll_cb (int max)	602	static int poll_cb (void)
646	{	603	{
647	dSP;
648	int count = 0;
649	int do_croak = 0;
650	aio_req req;
651
652	for (;;)	604	for (;;)
653	{	605	{
654	while (max <= 0 || count < max)	606	int res = eio_poll ();
655	{
656	maybe_start_thread ();
657		607
658	LOCK (reslock);	608	if (res > 0)
659	req = reqq_shift (&res_queue);
660
661	if (req)
662	{
663	--npending;
664
665	if (!res_queue.size)
666	{
667	/* read any signals sent by the worker threads */
668	char buf [32];
669	while (read (respipe [0], buf, 32) == 32)
670	;
671	}
672	}
673
674	UNLOCK (reslock);
675
676	if (!req)
677	break;
678
679	--nreqs;
680
681	if (req->type == REQ_GROUP && req->length)
682	{
683	req->fd = 1; /* mark request as delayed */
684	continue;
685	}
686	else
687	{
688	if (req->type == REQ_READ)
689	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
690
691	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
692	SvREADONLY_off (req->data);
693
694	if (req->statdata)
695	{
696	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
697	PL_laststatval = req->result;
698	PL_statcache = *(req->statdata);
699	}
700
701	req_invoke (req);
702
703	count++;
704	}
705
706	req_free (req);
707	}
708
709	if (nreqs <= max_outstanding)
710	break;	609	croak (0);
		610
		611	if (!max_outstanding || max_outstanding > eio_nreqs ())
		612	return res;
711		613
712	poll_wait ();	614	poll_wait ();
713
714	max = 0;
715	}	615	}
716
717	return count;
718	}	616	}
719		617
720	static void create_pipe ()	618	static void atfork_child (void)
721	{	619	{
722	if (pipe (respipe))	620	create_respipe ();
723	croak ("unable to initialize result pipe");
724
725	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
726	croak ("cannot set result pipe to nonblocking mode");
727
728	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
729	croak ("cannot set result pipe to nonblocking mode");
730	}	621	}
731		622
732	/*****************************************************************************/	623	/*****************************************************************************/
733	/* work around various missing functions */
734		624
735	#if !HAVE_PREADWRITE	625	#if !_POSIX_MAPPED_FILES
736	# define pread aio_pread	626	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
737	# define pwrite aio_pwrite	627	# define munmap(addr,length) (errno = ENOSYS, -1)
738
739	/*
740	* make our pread/pwrite safe against themselves, but not against
741	* normal read/write by using a mutex. slows down execution a lot,
742	* but that's your problem, not mine.
743	*/
744	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
745
746	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
747	{
748	ssize_t res;
749	off_t ooffset;
750
751	LOCK (preadwritelock);
752	ooffset = lseek (fd, 0, SEEK_CUR);
753	lseek (fd, offset, SEEK_SET);
754	res = read (fd, buf, count);
755	lseek (fd, ooffset, SEEK_SET);
756	UNLOCK (preadwritelock);
757
758	return res;
759	}
760
761	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
762	{
763	ssize_t res;
764	off_t ooffset;
765
766	LOCK (preadwritelock);
767	ooffset = lseek (fd, 0, SEEK_CUR);
768	lseek (fd, offset, SEEK_SET);
769	res = write (fd, buf, count);
770	lseek (fd, offset, SEEK_SET);
771	UNLOCK (preadwritelock);
772
773	return res;
774	}
775	#endif
776
777	#if !HAVE_FDATASYNC
778	# define fdatasync fsync
779	#endif
780
781	#if !HAVE_READAHEAD
782	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
783
784	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
785	{
786	dBUF;
787
788	while (count > 0)
789	{
790	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
791
792	pread (fd, aio_buf, len, offset);
793	offset += len;
794	count -= len;
795	}
796
797	errno = 0;
798	}
799
800	#endif
801
802	#if !HAVE_READDIR_R
803	# define readdir_r aio_readdir_r
804
805	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
806
807	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
808	{
809	struct dirent *e;
810	int errorno;
811
812	LOCK (readdirlock);
813
814	e = readdir (dirp);
815	errorno = errno;
816
817	if (e)
818	{
819	*res = ent;
820	strcpy (ent->d_name, e->d_name);
821	}
822	else
823	*res = 0;
824
825	UNLOCK (readdirlock);
826
827	errno = errorno;
828	return e ? 0 : -1;
829	}
830	#endif
831
832	/* sendfile always needs emulation */
833	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
834	{
835	ssize_t res;
836
837	if (!count)
838	return 0;
839
840	#if HAVE_SENDFILE
841	# if __linux
842	res = sendfile (ofd, ifd, &offset, count);
843
844	# elif __freebsd
845	/*
846	* Of course, the freebsd sendfile is a dire hack with no thoughts
847	* wasted on making it similar to other I/O functions.
848	*/
849	{
850	off_t sbytes;
851	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
852
853	if (res < 0 && sbytes)
854	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
855	res = sbytes;
856	}
857
858	# elif __hpux
859	res = sendfile (ofd, ifd, offset, count, 0, 0);
860
861	# elif __solaris
862	{
863	struct sendfilevec vec;
864	size_t sbytes;
865
866	vec.sfv_fd = ifd;
867	vec.sfv_flag = 0;
868	vec.sfv_off = offset;
869	vec.sfv_len = count;
870
871	res = sendfilev (ofd, &vec, 1, &sbytes);
872
873	if (res < 0 && sbytes)
874	res = sbytes;
875	}
876
877	# endif	628	#endif
878	#else
879	res = -1;
880	errno = ENOSYS;
881	#endif
882		629
883	if (res < 0	630	#define MMAP_MAGIC PERL_MAGIC_ext
884	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
885	#if __solaris
886	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
887	#endif
888	)
889	)
890	{
891	/* emulate sendfile. this is a major pain in the ass */
892	dBUF;
893		631
894	res = 0;	632	static int
		633	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		634	{
		635	int old_errno = errno;
		636	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		637	errno = old_errno;
895		638
896	while (count)	639	mg->mg_obj = 0; /* just in case */
897	{
898	ssize_t cnt;
899
900	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
901		640
902	if (cnt <= 0)	641	SvREADONLY_off (sv);
903	{
904	if (cnt && !res) res = -1;
905	break;
906	}
907		642
908	cnt = write (ofd, aio_buf, cnt);	643	if (SvPVX (sv) != mg->mg_ptr)
		644	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
909		645
910	if (cnt <= 0)	646	SvCUR_set (sv, 0);
911	{	647	SvPVX (sv) = 0;
912	if (cnt && !res) res = -1;	648	SvOK_off (sv);
913	break;
914	}
915		649
916	offset += cnt;
917	res += cnt;
918	count -= cnt;
919	}
920	}
921
922	return res;	650	return 0;
923	}	651	}
924		652
925	/* read a full directory */	653	static MGVTBL mmap_vtbl = {
926	static void scandir_ (aio_req req, worker *self)	654	0, 0, 0, 0, mmap_free
927	{	655	};
928	DIR *dirp;
929	union
930	{
931	struct dirent d;
932	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
933	} *u;
934	struct dirent *entp;
935	char *name, *names;
936	int memlen = 4096;
937	int memofs = 0;
938	int res = 0;
939	int errorno;
940
941	LOCK (wrklock);
942	self->dirp = dirp = opendir (req->dataptr);
943	self->dbuf = u = malloc (sizeof (*u));
944	req->data2ptr = names = malloc (memlen);
945	UNLOCK (wrklock);
946
947	if (dirp && u && names)
948	for (;;)
949	{
950	errno = 0;
951	readdir_r (dirp, &u->d, &entp);
952
953	if (!entp)
954	break;
955
956	name = entp->d_name;
957
958	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
959	{
960	int len = strlen (name) + 1;
961
962	res++;
963
964	while (memofs + len > memlen)
965	{
966	memlen *= 2;
967	LOCK (wrklock);
968	req->data2ptr = names = realloc (names, memlen);
969	UNLOCK (wrklock);
970
971	if (!names)
972	break;
973	}
974
975	memcpy (names + memofs, name, len);
976	memofs += len;
977	}
978	}
979
980	if (errno)
981	res = -1;
982
983	req->result = res;
984	}
985		656
986	/*****************************************************************************/	657	/*****************************************************************************/
987		658
988	static void *aio_proc (void *thr_arg)	659	static SV *
		660	get_cb (SV *cb_sv)
989	{	661	{
990	aio_req req;	662	SvGETMAGIC (cb_sv);
991	struct timespec ts;	663	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
992	worker *self = (worker *)thr_arg;
993
994	/* try to distribute timeouts somewhat evenly */
995	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
996	* (1000000000UL / 1024UL);
997
998	for (;;)
999	{
1000	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1001
1002	LOCK (reqlock);
1003
1004	for (;;)
1005	{
1006	self->req = req = reqq_shift (&req_queue);
1007
1008	if (req)
1009	break;
1010
1011	++idle;
1012
1013	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1014	== ETIMEDOUT)
1015	{
1016	if (idle > max_idle)
1017	{
1018	--idle;
1019	UNLOCK (reqlock);
1020	LOCK (wrklock);
1021	--started;
1022	UNLOCK (wrklock);
1023	goto quit;
1024	}
1025
1026	/* we are allowed to idle, so do so without any timeout */
1027	pthread_cond_wait (&reqwait, &reqlock);
1028	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1029	}
1030
1031	--idle;
1032	}
1033
1034	--nready;
1035
1036	UNLOCK (reqlock);
1037
1038	errno = 0; /* strictly unnecessary */
1039
1040	if (!(req->flags & FLAG_CANCELLED))
1041	switch (req->type)
1042	{
1043	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1044	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1045
1046	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1047	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1048
1049	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1050	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1051	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1052
1053	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1054	case REQ_CLOSE: req->result = close (req->fd); break;
1055	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1056	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1057	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1058	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1059	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1060	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1061
1062	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1063	case REQ_FSYNC: req->result = fsync (req->fd); break;
1064	case REQ_READDIR: scandir_ (req, self); break;
1065
1066	case REQ_BUSY:
1067	{
1068	struct timeval tv;
1069
1070	tv.tv_sec = req->fd;
1071	tv.tv_usec = req->fd2;
1072
1073	req->result = select (0, 0, 0, 0, &tv);
1074	}
1075
1076	case REQ_GROUP:
1077	case REQ_NOP:
1078	break;
1079
1080	case REQ_QUIT:
1081	goto quit;
1082
1083	default:
1084	req->result = ENOSYS;
1085	break;
1086	}
1087
1088	req->errorno = errno;
1089
1090	LOCK (reslock);
1091
1092	++npending;
1093
1094	if (!reqq_push (&res_queue, req))
1095	/* write a dummy byte to the pipe so fh becomes ready */
1096	write (respipe [1], &respipe, 1);
1097
1098	self->req = 0;
1099	worker_clear (self);
1100
1101	UNLOCK (reslock);
1102	}
1103
1104	quit:
1105	LOCK (wrklock);
1106	worker_free (self);
1107	UNLOCK (wrklock);
1108
1109	return 0;
1110	}
1111
1112	/*****************************************************************************/
1113
1114	static void atfork_prepare (void)
1115	{
1116	LOCK (wrklock);
1117	LOCK (reqlock);
1118	LOCK (reslock);
1119	#if !HAVE_PREADWRITE
1120	LOCK (preadwritelock);
1121	#endif
1122	#if !HAVE_READDIR_R
1123	LOCK (readdirlock);
1124	#endif
1125	}
1126
1127	static void atfork_parent (void)
1128	{
1129	#if !HAVE_READDIR_R
1130	UNLOCK (readdirlock);
1131	#endif
1132	#if !HAVE_PREADWRITE
1133	UNLOCK (preadwritelock);
1134	#endif
1135	UNLOCK (reslock);
1136	UNLOCK (reqlock);
1137	UNLOCK (wrklock);
1138	}
1139
1140	static void atfork_child (void)
1141	{
1142	aio_req prv;
1143
1144	while (prv = reqq_shift (&req_queue))
1145	req_free (prv);
1146
1147	while (prv = reqq_shift (&res_queue))
1148	req_free (prv);
1149
1150	while (wrk_first.next != &wrk_first)
1151	{
1152	worker *wrk = wrk_first.next;
1153
1154	if (wrk->req)
1155	req_free (wrk->req);
1156
1157	worker_clear (wrk);
1158	worker_free (wrk);
1159	}
1160
1161	started = 0;
1162	idle = 0;
1163	nreqs = 0;
1164	nready = 0;
1165	npending = 0;
1166
1167	close (respipe [0]);
1168	close (respipe [1]);
1169	create_pipe ();
1170
1171	atfork_parent ();
1172	}	664	}
1173		665
1174	#define dREQ \	666	#define dREQ \
		667	SV *cb_cv; \
1175	aio_req req; \	668	aio_req req; \
1176	int req_pri = next_pri; \	669	int req_pri = next_pri; \
1177	next_pri = DEFAULT_PRI + PRI_BIAS; \	670	next_pri = EIO_PRI_DEFAULT; \
1178	\	671	\
1179	if (SvOK (callback) && !SvROK (callback)) \	672	cb_cv = get_cb (callback); \
1180	croak ("callback must be undef or of reference type"); \
1181	\	673	\
1182	Newz (0, req, 1, aio_cb); \	674	Newz (0, req, 1, eio_req); \
1183	if (!req) \	675	if (!req) \
1184	croak ("out of memory during aio_req allocation"); \	676	croak ("out of memory during eio_req allocation"); \
1185	\	677	\
1186	req->callback = newSVsv (callback); \	678	req->callback = SvREFCNT_inc (cb_cv); \
1187	req->pri = req_pri	679	req->pri = req_pri
1188		680
1189	#define REQ_SEND \	681	#define REQ_SEND \
		682	PUTBACK; \
1190	req_send (req); \	683	req_submit (req); \
		684	SPAGAIN; \
1191	\	685	\
1192	if (GIMME_V != G_VOID) \	686	if (GIMME_V != G_VOID) \
1193	XPUSHs (req_sv (req, AIO_REQ_KLASS));	687	XPUSHs (req_sv (req, aio_req_stash));
1194		688
1195	MODULE = IO::AIO PACKAGE = IO::AIO	689	MODULE = IO::AIO PACKAGE = IO::AIO
1196		690
1197	PROTOTYPES: ENABLE	691	PROTOTYPES: ENABLE
1198		692
1199	BOOT:	693	BOOT:
1200	{	694	{
		695	static const struct {
		696	const char *name;
		697	IV iv;
		698	} *civ, const_iv[] = {
		699	# define const_niv(name, value) { # name, (IV) value },
		700	# define const_iv(name) { # name, (IV) name },
		701	# define const_eio(name) { # name, (IV) EIO_ ## name },
		702	const_iv (EXDEV)
		703	const_iv (ENOSYS)
		704	const_iv (O_RDONLY)
		705	const_iv (O_WRONLY)
		706	const_iv (O_RDWR)
		707	const_iv (O_CREAT)
		708	const_iv (O_TRUNC)
		709	const_iv (O_EXCL)
		710	const_iv (O_APPEND)
		711	#ifndef _WIN32
		712	const_iv (S_IFIFO)
		713	#endif
		714	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		715	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		716	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		717	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		718	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		719	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		720
		721	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		722	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		723	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		724	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		725	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		726
		727	const_iv (ST_RDONLY)
		728	const_iv (ST_NOSUID)
		729	const_iv (ST_NODEV)
		730	const_iv (ST_NOEXEC)
		731	const_iv (ST_SYNCHRONOUS)
		732	const_iv (ST_MANDLOCK)
		733	const_iv (ST_WRITE)
		734	const_iv (ST_APPEND)
		735	const_iv (ST_IMMUTABLE)
		736	const_iv (ST_NOATIME)
		737	const_iv (ST_NODIRATIME)
		738	const_iv (ST_RELATIME)
		739
		740	const_iv (PROT_EXEC)
		741	const_iv (PROT_NONE)
		742	const_iv (PROT_READ)
		743	const_iv (PROT_WRITE)
		744
		745	/*const_iv (MAP_FIXED)*/
		746	const_iv (MAP_PRIVATE)
		747	const_iv (MAP_SHARED)
		748	const_iv (MAP_ANONYMOUS)
		749
		750	/* linuxish */
		751	const_iv (MAP_HUGETLB)
		752	const_iv (MAP_LOCKED)
		753	const_iv (MAP_NORESERVE)
		754	const_iv (MAP_POPULATE)
		755	const_iv (MAP_NONBLOCK)
		756
		757	const_iv (MCL_FUTURE)
		758	const_iv (MCL_CURRENT)
		759
		760	const_eio (MS_ASYNC)
		761	const_eio (MS_INVALIDATE)
		762	const_eio (MS_SYNC)
		763
		764	const_eio (MT_MODIFY)
		765
		766	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		767	const_eio (SYNC_FILE_RANGE_WRITE)
		768	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		769
		770	const_eio (READDIR_DENTS)
		771	const_eio (READDIR_DIRS_FIRST)
		772	const_eio (READDIR_STAT_ORDER)
		773	const_eio (READDIR_FOUND_UNKNOWN)
		774
		775	const_eio (DT_UNKNOWN)
		776	const_eio (DT_FIFO)
		777	const_eio (DT_CHR)
		778	const_eio (DT_DIR)
		779	const_eio (DT_BLK)
		780	const_eio (DT_REG)
		781	const_eio (DT_LNK)
		782	const_eio (DT_SOCK)
		783	const_eio (DT_WHT)
		784	};
		785
1201	HV *stash = gv_stashpv ("IO::AIO", 1);	786	aio_stash = gv_stashpv ("IO::AIO" , 1);
		787	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		788	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1202		789
1203	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	790	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1204	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	791	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1205	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1206	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1207	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1208	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1209		792
		793	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		794
1210	create_pipe ();	795	create_respipe ();
1211	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	796
		797	if (eio_init (want_poll, done_poll) < 0)
		798	croak ("IO::AIO: unable to initialise eio library");
		799
		800	/* atfork child called in fifo order, so before eio's handler */
		801	X_THREAD_ATFORK (0, 0, atfork_child);
1212	}	802	}
		803
		804	void
		805	max_poll_reqs (int nreqs)
		806	PROTOTYPE: $
		807	CODE:
		808	eio_set_max_poll_reqs (nreqs);
		809
		810	void
		811	max_poll_time (double nseconds)
		812	PROTOTYPE: $
		813	CODE:
		814	eio_set_max_poll_time (nseconds);
1213		815
1214	void	816	void
1215	min_parallel (int nthreads)	817	min_parallel (int nthreads)
1216	PROTOTYPE: $	818	PROTOTYPE: $
		819	CODE:
		820	eio_set_min_parallel (nthreads);
1217		821
1218	void	822	void
1219	max_parallel (int nthreads)	823	max_parallel (int nthreads)
1220	PROTOTYPE: $	824	PROTOTYPE: $
		825	CODE:
		826	eio_set_max_parallel (nthreads);
1221		827
1222	int	828	void
		829	max_idle (int nthreads)
		830	PROTOTYPE: $
		831	CODE:
		832	eio_set_max_idle (nthreads);
		833
		834	void
1223	max_outstanding (int maxreqs)	835	max_outstanding (int maxreqs)
1224	PROTOTYPE: $	836	PROTOTYPE: $
1225	CODE:	837	CODE:
1226	RETVAL = max_outstanding;
1227	max_outstanding = maxreqs;	838	max_outstanding = maxreqs;
1228	OUTPUT:
1229	RETVAL
1230		839
1231	void	840	void
1232	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	841	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1233	SV * pathname
1234	int flags
1235	int mode
1236	SV * callback
1237	PROTOTYPE: $$$;$	842	PROTOTYPE: $$$;$
1238	PPCODE:	843	PPCODE:
1239	{	844	{
1240	dREQ;	845	dREQ;
1241		846
1242	req->type = REQ_OPEN;	847	req->type = EIO_OPEN;
1243	req->data = newSVsv (pathname);	848	req->sv1 = newSVsv (pathname);
1244	req->dataptr = SvPVbyte_nolen (req->data);	849	req->ptr1 = SvPVbyte_nolen (req->sv1);
1245	req->fd = flags;	850	req->int1 = flags;
1246	req->mode = mode;	851	req->int2 = mode;
1247		852
1248	REQ_SEND;	853	REQ_SEND;
1249	}	854	}
1250		855
1251	void	856	void
1252	aio_close (fh,callback=&PL_sv_undef)	857	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1253	SV * fh
1254	SV * callback
1255	PROTOTYPE: $;$	858	PROTOTYPE: $;$
1256	ALIAS:	859	ALIAS:
1257	aio_close = REQ_CLOSE
1258	aio_fsync = REQ_FSYNC	860	aio_fsync = EIO_FSYNC
1259	aio_fdatasync = REQ_FDATASYNC	861	aio_fdatasync = EIO_FDATASYNC
1260	PPCODE:	862	PPCODE:
1261	{	863	{
		864	int fd = s_fileno_croak (fh, 0);
1262	dREQ;	865	dREQ;
1263		866
1264	req->type = ix;	867	req->type = ix;
1265	req->fh = newSVsv (fh);	868	req->sv1 = newSVsv (fh);
1266	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	869	req->int1 = fd;
1267		870
1268	REQ_SEND (req);	871	REQ_SEND (req);
1269	}	872	}
1270		873
1271	void	874	void
		875	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		876	PROTOTYPE: $$$$;$
		877	PPCODE:
		878	{
		879	int fd = s_fileno_croak (fh, 0);
		880	dREQ;
		881
		882	req->type = EIO_SYNC_FILE_RANGE;
		883	req->sv1 = newSVsv (fh);
		884	req->int1 = fd;
		885	req->offs = offset;
		886	req->size = nbytes;
		887	req->int2 = flags;
		888
		889	REQ_SEND (req);
		890	}
		891
		892	void
		893	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		894	PROTOTYPE: $;$
		895	PPCODE:
		896	{
		897	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		898	int fd = s_fileno_croak (fh, 0);
		899	dREQ;
		900
		901	if (close_pipe < 0)
		902	{
		903	int pipefd [2];
		904
		905	if (pipe (pipefd) < 0
		906	|| close (pipefd [1]) < 0
		907	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		908	abort (); /*D*/
		909
		910	close_pipe = pipefd [0];
		911	}
		912
		913	req->type = EIO_DUP2;
		914	req->int1 = close_pipe;
		915	req->sv2 = newSVsv (fh);
		916	req->int2 = fd;
		917
		918	REQ_SEND (req);
		919	}
		920
		921	void
1272	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	922	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1273	SV * fh
1274	UV offset
1275	UV length
1276	SV * data
1277	UV dataoffset
1278	SV * callback
1279	ALIAS:	923	ALIAS:
1280	aio_read = REQ_READ	924	aio_read = EIO_READ
1281	aio_write = REQ_WRITE	925	aio_write = EIO_WRITE
1282	PROTOTYPE: $$$$$;$	926	PROTOTYPE: $$$$$;$
1283	PPCODE:	927	PPCODE:
1284	{	928	{
1285	aio_req req;
1286	STRLEN svlen;	929	STRLEN svlen;
		930	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1287	char *svptr = SvPVbyte (data, svlen);	931	char *svptr = SvPVbyte (data, svlen);
1288		932	UV len = SvUV (length);
1289	SvUPGRADE (data, SVt_PV);
1290	SvPOK_on (data);
1291		933
1292	if (dataoffset < 0)	934	if (dataoffset < 0)
1293	dataoffset += svlen;	935	dataoffset += svlen;
1294		936
1295	if (dataoffset < 0 || dataoffset > svlen)	937	if (dataoffset < 0 || dataoffset > svlen)
1296	croak ("data offset outside of string");	938	croak ("dataoffset outside of data scalar");
1297		939
1298	if (ix == REQ_WRITE)	940	if (ix == EIO_WRITE)
1299	{	941	{
1300	/* write: check length and adjust. */	942	/* write: check length and adjust. */
1301	if (length < 0 || length + dataoffset > svlen)	943	if (!SvOK (length) || len + dataoffset > svlen)
1302	length = svlen - dataoffset;	944	len = svlen - dataoffset;
1303	}	945	}
1304	else	946	else
1305	{	947	{
1306	/* read: grow scalar as necessary */	948	/* read: check type and grow scalar as necessary */
		949	SvUPGRADE (data, SVt_PV);
1307	svptr = SvGROW (data, length + dataoffset);	950	svptr = SvGROW (data, len + dataoffset + 1);
1308	}	951	}
1309
1310	if (length < 0)
1311	croak ("length must not be negative");
1312		952
1313	{	953	{
1314	dREQ;	954	dREQ;
1315		955
1316	req->type = ix;	956	req->type = ix;
1317	req->fh = newSVsv (fh);	957	req->sv1 = newSVsv (fh);
1318	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	958	req->int1 = fd;
1319	: IoOFP (sv_2io (fh)));	959	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1320	req->offset = offset;	960	req->size = len;
1321	req->length = length;
1322	req->data = SvREFCNT_inc (data);	961	req->sv2 = SvREFCNT_inc (data);
1323	req->dataptr = (char *)svptr + dataoffset;	962	req->ptr2 = (char *)svptr + dataoffset;
		963	req->stroffset = dataoffset;
1324		964
1325	if (!SvREADONLY (data))	965	if (!SvREADONLY (data))
1326	{	966	{
1327	SvREADONLY_on (data);	967	SvREADONLY_on (data);
1328	req->data2ptr = (void *)data;	968	req->flags |= FLAG_SV2_RO_OFF;
1329	}	969	}
1330		970
1331	REQ_SEND;	971	REQ_SEND;
1332	}	972	}
1333	}	973	}
1334		974
1335	void	975	void
		976	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		977	PROTOTYPE: $$;$
		978	PPCODE:
		979	{
		980	SV *data;
		981	dREQ;
		982
		983	req->type = EIO_READLINK;
		984	req->sv1 = newSVsv (path);
		985	req->ptr1 = SvPVbyte_nolen (req->sv1);
		986
		987	REQ_SEND;
		988	}
		989
		990	void
1336	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	991	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1337	SV * out_fh
1338	SV * in_fh
1339	UV in_offset
1340	UV length
1341	SV * callback
1342	PROTOTYPE: $$$$;$	992	PROTOTYPE: $$$$;$
1343	PPCODE:	993	PPCODE:
1344	{	994	{
		995	int ifd = s_fileno_croak (in_fh , 0);
		996	int ofd = s_fileno_croak (out_fh, 1);
1345	dREQ;	997	dREQ;
1346		998
1347	req->type = REQ_SENDFILE;	999	req->type = EIO_SENDFILE;
1348	req->fh = newSVsv (out_fh);	1000	req->sv1 = newSVsv (out_fh);
1349	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1001	req->int1 = ofd;
1350	req->fh2 = newSVsv (in_fh);	1002	req->sv2 = newSVsv (in_fh);
1351	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1003	req->int2 = ifd;
1352	req->offset = in_offset;	1004	req->offs = in_offset;
1353	req->length = length;	1005	req->size = length;
1354		1006
1355	REQ_SEND;	1007	REQ_SEND;
1356	}	1008	}
1357		1009
1358	void	1010	void
1359	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1011	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1360	SV * fh
1361	UV offset
1362	IV length
1363	SV * callback
1364	PROTOTYPE: $$$;$	1012	PROTOTYPE: $$$;$
1365	PPCODE:	1013	PPCODE:
1366	{	1014	{
		1015	int fd = s_fileno_croak (fh, 0);
1367	dREQ;	1016	dREQ;
1368		1017
1369	req->type = REQ_READAHEAD;	1018	req->type = EIO_READAHEAD;
1370	req->fh = newSVsv (fh);	1019	req->sv1 = newSVsv (fh);
1371	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1020	req->int1 = fd;
1372	req->offset = offset;	1021	req->offs = offset;
1373	req->length = length;	1022	req->size = length;
1374		1023
1375	REQ_SEND;	1024	REQ_SEND;
1376	}	1025	}
1377		1026
1378	void	1027	void
1379	aio_stat (fh_or_path,callback=&PL_sv_undef)	1028	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1380	SV * fh_or_path
1381	SV * callback
1382	ALIAS:	1029	ALIAS:
1383	aio_stat = REQ_STAT	1030	aio_stat = EIO_STAT
1384	aio_lstat = REQ_LSTAT	1031	aio_lstat = EIO_LSTAT
		1032	aio_statvfs = EIO_STATVFS
1385	PPCODE:	1033	PPCODE:
1386	{	1034	{
1387	dREQ;	1035	dREQ;
1388		1036
1389	New (0, req->statdata, 1, Stat_t);	1037	req->sv1 = newSVsv (fh_or_path);
1390	if (!req->statdata)
1391	{
1392	req_free (req);
1393	croak ("out of memory during aio_req->statdata allocation");
1394	}
1395		1038
1396	if (SvPOK (fh_or_path))	1039	if (SvPOK (req->sv1))
1397	{	1040	{
1398	req->type = ix;	1041	req->type = ix;
1399	req->data = newSVsv (fh_or_path);
1400	req->dataptr = SvPVbyte_nolen (req->data);	1042	req->ptr1 = SvPVbyte_nolen (req->sv1);
1401	}	1043	}
1402	else	1044	else
1403	{	1045	{
1404	req->type = REQ_FSTAT;	1046	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1405	req->fh = newSVsv (fh_or_path);
1406	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1047	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1407	}	1048	}
1408		1049
1409	REQ_SEND;	1050	REQ_SEND;
1410	}	1051	}
1411		1052
1412	void	1053	void
		1054	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1055	PPCODE:
		1056	{
		1057	dREQ;
		1058
		1059	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1060	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1061	req->sv1 = newSVsv (fh_or_path);
		1062
		1063	if (SvPOK (req->sv1))
		1064	{
		1065	req->type = EIO_UTIME;
		1066	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1067	}
		1068	else
		1069	{
		1070	req->type = EIO_FUTIME;
		1071	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1072	}
		1073
		1074	REQ_SEND;
		1075	}
		1076
		1077	void
		1078	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1079	PPCODE:
		1080	{
		1081	dREQ;
		1082
		1083	req->sv1 = newSVsv (fh_or_path);
		1084	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1085
		1086	if (SvPOK (req->sv1))
		1087	{
		1088	req->type = EIO_TRUNCATE;
		1089	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1090	}
		1091	else
		1092	{
		1093	req->type = EIO_FTRUNCATE;
		1094	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1095	}
		1096
		1097	REQ_SEND;
		1098	}
		1099
		1100	void
		1101	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1102	ALIAS:
		1103	aio_chmod = EIO_CHMOD
		1104	aio_mkdir = EIO_MKDIR
		1105	PPCODE:
		1106	{
		1107	dREQ;
		1108
		1109	req->int2 = mode;
		1110	req->sv1 = newSVsv (fh_or_path);
		1111
		1112	if (SvPOK (req->sv1))
		1113	{
		1114	req->type = ix;
		1115	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1116	}
		1117	else
		1118	{
		1119	req->type = EIO_FCHMOD;
		1120	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1121	}
		1122
		1123	REQ_SEND;
		1124	}
		1125
		1126	void
		1127	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1128	PPCODE:
		1129	{
		1130	dREQ;
		1131
		1132	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1133	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1134	req->sv1 = newSVsv (fh_or_path);
		1135
		1136	if (SvPOK (req->sv1))
		1137	{
		1138	req->type = EIO_CHOWN;
		1139	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1140	}
		1141	else
		1142	{
		1143	req->type = EIO_FCHOWN;
		1144	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1145	}
		1146
		1147	REQ_SEND;
		1148	}
		1149
		1150	void
		1151	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1152	PPCODE:
		1153	{
		1154	dREQ;
		1155
		1156	req->type = EIO_READDIR;
		1157	req->sv1 = newSVsv (pathname);
		1158	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1159	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1160
		1161	if (flags & EIO_READDIR_DENTS)
		1162	req->int1 |= EIO_READDIR_CUSTOM2;
		1163
		1164	REQ_SEND;
		1165	}
		1166
		1167	void
1413	aio_unlink (pathname,callback=&PL_sv_undef)	1168	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1414	SV * pathname
1415	SV * callback
1416	ALIAS:	1169	ALIAS:
1417	aio_unlink = REQ_UNLINK	1170	aio_unlink = EIO_UNLINK
1418	aio_rmdir = REQ_RMDIR	1171	aio_rmdir = EIO_RMDIR
1419	aio_readdir = REQ_READDIR	1172	aio_readdir = EIO_READDIR
1420	PPCODE:	1173	PPCODE:
1421	{	1174	{
1422	dREQ;	1175	dREQ;
1423		1176
1424	req->type = ix;	1177	req->type = ix;
1425	req->data = newSVsv (pathname);	1178	req->sv1 = newSVsv (pathname);
1426	req->dataptr = SvPVbyte_nolen (req->data);	1179	req->ptr1 = SvPVbyte_nolen (req->sv1);
1427		1180
1428	REQ_SEND;	1181	REQ_SEND;
1429	}	1182	}
1430		1183
1431	void	1184	void
1432	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1185	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1433	SV * oldpath
1434	SV * newpath
1435	SV * callback
1436	ALIAS:	1186	ALIAS:
1437	aio_link = REQ_LINK	1187	aio_link = EIO_LINK
1438	aio_symlink = REQ_SYMLINK	1188	aio_symlink = EIO_SYMLINK
1439	aio_rename = REQ_RENAME	1189	aio_rename = EIO_RENAME
1440	PPCODE:	1190	PPCODE:
1441	{	1191	{
1442	dREQ;	1192	dREQ;
1443		1193
1444	req->type = ix;	1194	req->type = ix;
1445	req->fh = newSVsv (oldpath);	1195	req->sv1 = newSVsv (oldpath);
1446	req->data2ptr = SvPVbyte_nolen (req->fh);	1196	req->ptr1 = SvPVbyte_nolen (req->sv1);
1447	req->data = newSVsv (newpath);	1197	req->sv2 = newSVsv (newpath);
1448	req->dataptr = SvPVbyte_nolen (req->data);	1198	req->ptr2 = SvPVbyte_nolen (req->sv2);
1449		1199
1450	REQ_SEND;	1200	REQ_SEND;
1451	}	1201	}
1452		1202
1453	void	1203	void
1454	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1204	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1455	SV * pathname
1456	SV * callback
1457	UV mode
1458	UV dev
1459	PPCODE:	1205	PPCODE:
1460	{	1206	{
1461	dREQ;	1207	dREQ;
1462		1208
1463	req->type = REQ_MKNOD;	1209	req->type = EIO_MKNOD;
1464	req->data = newSVsv (pathname);	1210	req->sv1 = newSVsv (pathname);
1465	req->dataptr = SvPVbyte_nolen (req->data);	1211	req->ptr1 = SvPVbyte_nolen (req->sv1);
1466	req->mode = (mode_t)mode;	1212	req->int2 = (mode_t)mode;
1467	req->offset = dev;	1213	req->offs = dev;
1468		1214
1469	REQ_SEND;	1215	REQ_SEND;
1470	}	1216	}
1471		1217
1472	void	1218	void
		1219	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1220	ALIAS:
		1221	aio_mtouch = EIO_MTOUCH
		1222	aio_msync = EIO_MSYNC
		1223	PROTOTYPE: $$$$;$
		1224	PPCODE:
		1225	{
		1226	STRLEN svlen;
		1227	UV len = SvUV (length);
		1228	char *svptr = SvPVbyte (data, svlen);
		1229
		1230	if (offset < 0)
		1231	offset += svlen;
		1232
		1233	if (offset < 0 || offset > svlen)
		1234	croak ("offset outside of scalar");
		1235
		1236	if (!SvOK (length) || len + offset > svlen)
		1237	len = svlen - offset;
		1238
		1239	{
		1240	dREQ;
		1241
		1242	req->type = ix;
		1243	req->size = len;
		1244	req->sv2 = SvREFCNT_inc (data);
		1245	req->ptr2 = (char *)svptr + offset;
		1246	req->int1 = flags;
		1247
		1248	REQ_SEND;
		1249	}
		1250	}
		1251
		1252	void
1473	aio_busy (delay,callback=&PL_sv_undef)	1253	aio_busy (double delay, SV *callback=&PL_sv_undef)
1474	double delay
1475	SV * callback
1476	PPCODE:	1254	PPCODE:
1477	{	1255	{
1478	dREQ;	1256	dREQ;
1479		1257
1480	req->type = REQ_BUSY;	1258	req->type = EIO_BUSY;
1481	req->fd = delay < 0. ? 0 : delay;	1259	req->nv1 = delay < 0. ? 0. : delay;
1482	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1483		1260
1484	REQ_SEND;	1261	REQ_SEND;
1485	}	1262	}
1486		1263
1487	void	1264	void
1488	aio_group (callback=&PL_sv_undef)	1265	aio_group (SV *callback=&PL_sv_undef)
1489	SV * callback
1490	PROTOTYPE: ;$	1266	PROTOTYPE: ;$
1491	PPCODE:	1267	PPCODE:
1492	{	1268	{
1493	dREQ;	1269	dREQ;
1494		1270
1495	req->type = REQ_GROUP;	1271	req->type = EIO_GROUP;
		1272
1496	req_send (req);	1273	req_submit (req);
1497
1498	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1274	XPUSHs (req_sv (req, aio_grp_stash));
1499	}	1275	}
1500		1276
1501	void	1277	void
1502	aio_nop (callback=&PL_sv_undef)	1278	aio_nop (SV *callback=&PL_sv_undef)
1503	SV * callback	1279	ALIAS:
		1280	aio_nop = EIO_NOP
		1281	aio_sync = EIO_SYNC
1504	PPCODE:	1282	PPCODE:
1505	{	1283	{
1506	dREQ;	1284	dREQ;
1507		1285
1508	req->type = REQ_NOP;	1286	req->type = ix;
1509		1287
1510	REQ_SEND;	1288	REQ_SEND;
1511	}	1289	}
1512		1290
1513	int	1291	int
1514	aioreq_pri (int pri = 0)	1292	aioreq_pri (int pri = 0)
1515	PROTOTYPE: ;$	1293	PROTOTYPE: ;$
1516	CODE:	1294	CODE:
1517	RETVAL = next_pri - PRI_BIAS;	1295	RETVAL = next_pri;
1518	if (items > 0)	1296	if (items > 0)
1519	{	1297	{
1520	if (pri < PRI_MIN) pri = PRI_MIN;	1298	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1521	if (pri > PRI_MAX) pri = PRI_MAX;	1299	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1522	next_pri = pri + PRI_BIAS;	1300	next_pri = pri;
1523	}	1301	}
1524	OUTPUT:	1302	OUTPUT:
1525	RETVAL	1303	RETVAL
1526		1304
1527	void	1305	void
1528	aioreq_nice (int nice = 0)	1306	aioreq_nice (int nice = 0)
1529	CODE:	1307	CODE:
1530	nice = next_pri - nice;	1308	nice = next_pri - nice;
1531	if (nice < PRI_MIN) nice = PRI_MIN;	1309	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1532	if (nice > PRI_MAX) nice = PRI_MAX;	1310	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1533	next_pri = nice + PRI_BIAS;	1311	next_pri = nice;
1534		1312
1535	void	1313	void
1536	flush ()	1314	flush ()
1537	PROTOTYPE:	1315	PROTOTYPE:
1538	CODE:	1316	CODE:
1539	while (nreqs)	1317	while (eio_nreqs ())
1540	{	1318	{
1541	poll_wait ();	1319	poll_wait ();
1542	poll_cb (0);	1320	poll_cb ();
1543	}	1321	}
1544		1322
1545	void	1323	int
1546	poll()	1324	poll()
1547	PROTOTYPE:	1325	PROTOTYPE:
1548	CODE:	1326	CODE:
1549	if (nreqs)
1550	{
1551	poll_wait ();	1327	poll_wait ();
1552	poll_cb (0);	1328	RETVAL = poll_cb ();
1553	}	1329	OUTPUT:
		1330	RETVAL
1554		1331
1555	int	1332	int
1556	poll_fileno()	1333	poll_fileno()
1557	PROTOTYPE:	1334	PROTOTYPE:
1558	CODE:	1335	CODE:
1559	RETVAL = respipe [0];	1336	RETVAL = s_epipe_fd (&respipe);
1560	OUTPUT:	1337	OUTPUT:
1561	RETVAL	1338	RETVAL
1562		1339
1563	int	1340	int
1564	poll_cb(...)	1341	poll_cb(...)
1565	PROTOTYPE:	1342	PROTOTYPE:
1566	CODE:	1343	CODE:
1567	RETVAL = poll_cb (0);	1344	RETVAL = poll_cb ();
1568	OUTPUT:	1345	OUTPUT:
1569	RETVAL	1346	RETVAL
1570		1347
1571	int
1572	poll_some(int max = 0)
1573	PROTOTYPE: $
1574	CODE:
1575	RETVAL = poll_cb (max);
1576	OUTPUT:
1577	RETVAL
1578
1579	void	1348	void
1580	poll_wait()	1349	poll_wait()
1581	PROTOTYPE:	1350	PROTOTYPE:
1582	CODE:	1351	CODE:
1583	if (nreqs)
1584	poll_wait ();	1352	poll_wait ();
1585		1353
1586	int	1354	int
1587	nreqs()	1355	nreqs()
1588	PROTOTYPE:	1356	PROTOTYPE:
1589	CODE:	1357	CODE:
1590	RETVAL = nreqs;	1358	RETVAL = eio_nreqs ();
1591	OUTPUT:	1359	OUTPUT:
1592	RETVAL	1360	RETVAL
1593		1361
1594	int	1362	int
1595	nready()	1363	nready()
1596	PROTOTYPE:	1364	PROTOTYPE:
1597	CODE:	1365	CODE:
1598	RETVAL = get_nready ();	1366	RETVAL = eio_nready ();
1599	OUTPUT:	1367	OUTPUT:
1600	RETVAL	1368	RETVAL
1601		1369
1602	int	1370	int
1603	npending()	1371	npending()
1604	PROTOTYPE:	1372	PROTOTYPE:
1605	CODE:	1373	CODE:
1606	RETVAL = get_npending ();	1374	RETVAL = eio_npending ();
1607	OUTPUT:	1375	OUTPUT:
1608	RETVAL	1376	RETVAL
1609		1377
		1378	int
		1379	nthreads()
		1380	PROTOTYPE:
		1381	CODE:
		1382	RETVAL = eio_nthreads ();
		1383	OUTPUT:
		1384	RETVAL
		1385
		1386	int
		1387	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1388	PROTOTYPE: $$$$
		1389	CODE:
		1390	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1391	RETVAL = posix_fadvise (fh, offset, length, advice);
		1392	#else
		1393	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1394	#endif
		1395	OUTPUT:
		1396	RETVAL
		1397
		1398	ssize_t
		1399	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1400	PROTOTYPE: $$$$
		1401	CODE:
		1402	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1403	OUTPUT:
		1404	RETVAL
		1405
		1406	void
		1407	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1408	PROTOTYPE: $$$$$;$
		1409	PPCODE:
		1410	sv_unmagic (scalar, MMAP_MAGIC);
		1411	{
		1412	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1413	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1414	if (addr == (void *)-1)
		1415	XSRETURN_NO;
		1416
		1417	sv_force_normal (scalar);
		1418
		1419	/* we store the length in mg_obj, as namlen is I32 :/ */
		1420	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1421	->mg_obj = (SV *)length;
		1422
		1423	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1424
		1425	if (!(prot & PROT_WRITE))
		1426	SvREADONLY_on (scalar);
		1427
		1428	if (SvLEN (scalar))
		1429	Safefree (SvPVX (scalar));
		1430
		1431	SvPVX (scalar) = (char *)addr;
		1432	SvCUR_set (scalar, length);
		1433	SvLEN_set (scalar, 0);
		1434	SvPOK_only (scalar);
		1435
		1436	XSRETURN_YES;
		1437	}
		1438
		1439	void
		1440	munmap (SV *scalar)
		1441	PROTOTYPE: $
		1442	CODE:
		1443	sv_unmagic (scalar, MMAP_MAGIC);
		1444
		1445	int
		1446	madvise (SV *scalar, off_t offset, off_t length, IV advice)
		1447	PROTOTYPE: $$$$
		1448	CODE:
		1449	{
		1450	char *addr = SvPV_nolen (scalar) + offset;
		1451
		1452	if (!SvOK (ST (2)))
		1453	length = SvCUR (scalar) - offset;
		1454
		1455	if (addr >= SvEND (scalar) || length <= 0)
		1456	XSRETURN_EMPTY;
		1457
		1458	#if _XOPEN_SOURCE >= 600 && !NO_MADVISE
		1459	RETVAL = posix_madvise (addr, length, advice);
		1460	#else
		1461	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1462	#endif
		1463	}
		1464	OUTPUT:
		1465	RETVAL
		1466
		1467	int
		1468	mlockall (int flags)
		1469	PROTOTYPE: $
		1470	CODE:
		1471	#if _POSIX_MEMLOCK
		1472	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1473	extern int mallopt (int, int);
		1474	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1475	#endif
		1476	mlockall (flags);
		1477	#else
		1478	RETVAL = -1;
		1479	errno = ENOSYS;
		1480	#endif
		1481	OUTPUT:
		1482	RETVAL
		1483
		1484	int
		1485	munlockall ()
		1486	PROTOTYPE:
		1487	CODE:
		1488	#if _POSIX_MEMLOCK
		1489	munlockall ();
		1490	#else
		1491	RETVAL = -1;
		1492	errno = ENOSYS;
		1493	#endif
		1494	OUTPUT:
		1495	RETVAL
		1496
		1497	void _on_next_submit (SV *cb)
		1498	CODE:
		1499	SvREFCNT_dec (on_next_submit);
		1500	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1501
1610	PROTOTYPES: DISABLE	1502	PROTOTYPES: DISABLE
1611		1503
1612	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1504	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1613		1505
1614	void	1506	void
1615	cancel (aio_req_ornot req)	1507	cancel (aio_req_ornot req)
1616	CODE:	1508	CODE:
1617	req_cancel (req);	1509	eio_cancel (req);
1618		1510
1619	void	1511	void
1620	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1512	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1621	CODE:	1513	PPCODE:
		1514	{
		1515	if (GIMME_V != G_VOID)
		1516	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1517
		1518	if (items > 1)
		1519	{
		1520	SV *cb_cv =get_cb (callback);
		1521
1622	SvREFCNT_dec (req->callback);	1522	SvREFCNT_dec (req->callback);
1623	req->callback = newSVsv (callback);	1523	req->callback = SvREFCNT_inc (cb_cv);
		1524	}
		1525	}
1624		1526
1625	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1527	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1626		1528
1627	void	1529	void
1628	add (aio_req grp, ...)	1530	add (aio_req grp, ...)
1629	PPCODE:	1531	PPCODE:
1630	{	1532	{
1631	int i;	1533	int i;
1632	aio_req req;
1633		1534
1634	if (grp->fd == 2)	1535	if (grp->int1 == 2)
1635	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1536	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1636		1537
1637	for (i = 1; i < items; ++i )	1538	for (i = 1; i < items; ++i )
1638	{	1539	{
		1540	aio_req req;
		1541
1639	if (GIMME_V != G_VOID)	1542	if (GIMME_V != G_VOID)
1640	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1543	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1641		1544
1642	req = SvAIO_REQ (ST (i));	1545	req = SvAIO_REQ (ST (i));
1643		1546
1644	if (req)	1547	if (req)
1645	{	1548	eio_grp_add (grp, req);
1646	++grp->length;
1647	req->grp = grp;
1648
1649	req->grp_prev = 0;
1650	req->grp_next = grp->grp_first;
1651
1652	if (grp->grp_first)
1653	grp->grp_first->grp_prev = req;
1654
1655	grp->grp_first = req;
1656	}
1657	}	1549	}
1658	}	1550	}
1659		1551
1660	void	1552	void
1661	cancel_subs (aio_req_ornot req)	1553	cancel_subs (aio_req_ornot req)
…		…
1670	AV *av;	1562	AV *av;
1671		1563
1672	grp->errorno = errno;	1564	grp->errorno = errno;
1673		1565
1674	av = newAV ();	1566	av = newAV ();
		1567	av_extend (av, items - 1);
1675		1568
1676	for (i = 1; i < items; ++i )	1569	for (i = 1; i < items; ++i )
1677	av_push (av, newSVsv (ST (i)));	1570	av_push (av, newSVsv (ST (i)));
1678		1571
1679	SvREFCNT_dec (grp->data);	1572	SvREFCNT_dec (grp->sv1);
1680	grp->data = (SV *)av;	1573	grp->sv1 = (SV *)av;
1681	}	1574	}
1682		1575
1683	void	1576	void
1684	errno (aio_req grp, int errorno = errno)	1577	errno (aio_req grp, int errorno = errno)
1685	CODE:	1578	CODE:
1686	grp->errorno = errorno;	1579	grp->errorno = errorno;
1687		1580
1688	void	1581	void
1689	limit (aio_req grp, int limit)	1582	limit (aio_req grp, int limit)
1690	CODE:	1583	CODE:
1691	grp->fd2 = limit;	1584	eio_grp_limit (grp, limit);
1692	aio_grp_feed (grp);
1693		1585
1694	void	1586	void
1695	feed (aio_req grp, SV *callback=&PL_sv_undef)	1587	feed (aio_req grp, SV *callback=&PL_sv_undef)
1696	CODE:	1588	CODE:
1697	{	1589	{
1698	SvREFCNT_dec (grp->fh2);	1590	SvREFCNT_dec (grp->sv2);
1699	grp->fh2 = newSVsv (callback);	1591	grp->sv2 = newSVsv (callback);
		1592	grp->feed = aio_grp_feed;
1700		1593
1701	if (grp->fd2 <= 0)	1594	if (grp->int2 <= 0)
1702	grp->fd2 = 2;	1595	grp->int2 = 2;
1703		1596
1704	aio_grp_feed (grp);	1597	eio_grp_limit (grp, grp->int2);
1705	}	1598	}
1706		1599

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