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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.93 by root, Wed Nov 8 02:01:02 2006 UTC vs.
Revision 1.168 by root, Wed Aug 4 14:02:58 2010 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
27	#include <limits.h>	17	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	18	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	19	#include <sched.h>
32		20
33	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
34	# if __linux
35	# include <sys/sendfile.h>	22	# include <sys/mman.h>
36	# elif __freebsd	23	#endif
37	# include <sys/socket.h>	24
		25	/* perl namespace pollution */
		26	#undef VERSION
		27
		28	#ifdef _WIN32
		29
		30	# define EIO_STRUCT_DIRENT Direntry_t
		31	# undef malloc
		32	# undef free
		33
		34	// perl overrides all those nice win32 functions
		35	# undef open
		36	# undef read
		37	# undef write
		38	# undef send
		39	# undef recv
		40	# undef stat
		41	# undef fstat
		42	# define lstat stat
		43	# undef truncate
		44	# undef ftruncate
		45	# undef open
		46	# undef close
		47	# undef unlink
		48	# undef rmdir
		49	# undef rename
		50	# undef lseek
		51
		52	# define chown(a,b,c) (errno = ENOSYS, -1)
		53	# define fchown(a,b,c) (errno = ENOSYS, -1)
		54	# define fchmod(a,b) (errno = ENOSYS, -1)
		55	# define symlink(a,b) (errno = ENOSYS, -1)
		56	# define readlink(a,b,c) (errno = ENOSYS, -1)
		57	# define mknod(a,b,c) (errno = ENOSYS, -1)
		58	# define truncate(a,b) (errno = ENOSYS, -1)
		59	# define ftruncate(fd,o) chsize ((fd), (o))
		60	# define fsync(fd) _commit (fd)
		61	# define opendir(fd) (errno = ENOSYS, 0)
		62	# define readdir(fd) (errno = ENOSYS, -1)
		63	# define closedir(fd) (errno = ENOSYS, -1)
		64	# define mkdir(a,b) mkdir (a)
		65
		66	#else
		67
38	# include <sys/uio.h>	68	# include <sys/time.h>
39	# elif __hpux
40	# include <sys/socket.h>
41	# elif __solaris /* not yet */
42	# include <sys/sendfile.h>	69	# include <sys/select.h>
		70	# include <unistd.h>
		71	# include <utime.h>
		72	# include <signal.h>
		73	# define EIO_STRUCT_DIRENT struct dirent
		74
		75	#endif
		76
		77	/* perl stupidly overrides readdir and maybe others */
		78	/* with thread-unsafe versions, imagine that :( */
		79	#undef readdir
		80	#undef opendir
		81	#undef closedir
		82
		83	#define EIO_STRUCT_STAT Stat_t
		84
		85	/* use NV for 32 bit perls as it allows larger offsets */
		86	#if IVSIZE >= 8
		87	# define VAL64 IV
		88	# define SvVAL64 SvIV
		89	# define newSVval64 newSViv
		90	#else
		91	# define VAL64 NV
		92	# define SvVAL64 SvNV
		93	# define newSVval64 newSVnv
		94	#endif
		95
		96	/*****************************************************************************/
		97
		98	#if __GNUC__ >= 3
		99	# define expect(expr,value) __builtin_expect ((expr),(value))
		100	#else
		101	# define expect(expr,value) (expr)
		102	#endif
		103
		104	#define expect_false(expr) expect ((expr) != 0, 0)
		105	#define expect_true(expr) expect ((expr) != 0, 1)
		106
		107	/*****************************************************************************/
		108
		109	typedef SV SV8; /* byte-sv, used for argument-checking */
		110	typedef int aio_rfd; /* read file desriptor */
		111	typedef int aio_wfd; /* write file descriptor */
		112
		113	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		114
		115	#define EIO_REQ_MEMBERS \
		116	SV *callback; \
		117	SV *sv1, *sv2; \
		118	STRLEN stroffset; \
		119	SV *self;
		120
		121	#define EIO_NO_WRAPPERS 1
		122
		123	#include "libeio/eio.h"
		124
		125	#ifndef POSIX_FADV_NORMAL
		126	# define POSIX_FADV_NORMAL 0
		127	# define NO_FADVISE 1
		128	#endif
		129	#ifndef POSIX_FADV_SEQUENTIAL
		130	# define POSIX_FADV_SEQUENTIAL 0
		131	#endif
		132	#ifndef POSIX_FADV_RANDOM
		133	# define POSIX_FADV_RANDOM 0
		134	#endif
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	#ifndef ST_NODEV
		146	# define ST_NODEV 0
		147	#endif
		148	#ifndef ST_NOEXEC
		149	# define ST_NOEXEC 0
		150	#endif
		151	#ifndef ST_SYNCHRONOUS
		152	# define ST_SYNCHRONOUS 0
		153	#endif
		154	#ifndef ST_MANDLOCK
		155	# define ST_MANDLOCK 0
		156	#endif
		157	#ifndef ST_WRITE
		158	# define ST_WRITE 0
		159	#endif
		160	#ifndef ST_APPEND
		161	# define ST_APPEND 0
		162	#endif
		163	#ifndef ST_IMMUTABLE
		164	# define ST_IMMUTABLE 0
		165	#endif
		166	#ifndef ST_NOATIME
		167	# define ST_NOATIME 0
		168	#endif
		169	#ifndef ST_NODIRATIME
		170	# define ST_NODIRATIME 0
		171	#endif
		172	#ifndef ST_RELATIME
		173	# define ST_RELATIME 0
		174	#endif
		175
		176	#ifndef MCL_CURRENT
		177	# define MCL_CURRENT 0
		178	#endif
		179	#ifndef MCL_FUTURE
		180	# define MCL_FUTURE 0
		181	#endif
		182
		183	#ifndef MAP_ANONYMOUS
		184	# ifdef MAP_ANON
		185	# define MAP_ANONYMOUS MAP_ANON
43	# else	186	# else
44	# error sendfile support requested but not available	187	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	188	# endif
46	#endif	189	#endif
47		190	#ifndef MAP_HUGETLB
48	/* number of seconds after which idle threads exit */	191	# define MAP_HUGETLB 0
49	#define IDLE_TIMEOUT 10
50
51	/* used for struct dirent, AIX doesn't provide it */
52	#ifndef NAME_MAX
53	# define NAME_MAX 4096
54	#endif
55
56	#ifndef PTHREAD_STACK_MIN
57	/* care for broken platforms, e.g. windows */
58	# define PTHREAD_STACK_MIN 16384
59	#endif
60
61	#if __ia64
62	# define STACKSIZE 65536
63	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
64	# define STACKSIZE PTHREAD_STACK_MIN
65	#else
66	# define STACKSIZE 16384
67	#endif
68
69	/* wether word reads are potentially non-atomic.
70	* this is conservatice, likely most arches this runs
71	* on have atomic word read/writes.
72	*/
73	#ifndef WORDACCESS_UNSAFE
74	# if __i386 || __x86_64
75	# define WORDACCESS_UNSAFE 0
76	# else
77	# define WORDACCESS_UNSAFE 1
78	# endif	192	#endif
		193	#ifndef MAP_LOCKED
		194	# define MAP_LOCKED 0
79	#endif	195	#endif
		196	#ifndef MAP_NORESERVE
		197	# define MAP_NORESERVE 0
		198	#endif
		199	#ifndef MAP_POPULATE
		200	# define MAP_POPULATE 0
		201	#endif
		202	#ifndef MAP_NONBLOCK
		203	# define MAP_NONBLOCK 0
		204	#endif
80		205
81	/* buffer size for various temporary buffers */	206	#ifndef PAGESIZE
82	#define AIO_BUFSIZE 65536	207	# define PAGESIZE sysconf (_SC_PAGESIZE)
		208	#endif
83		209
84	#define dBUF \	210	static int req_invoke (eio_req *req);
85	char *aio_buf; \	211	#define EIO_FINISH(req) req_invoke (req)
86	LOCK (wrklock); \	212	static void req_destroy (eio_req *grp);
87	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	213	#define EIO_DESTROY(req) req_destroy (req)
88	UNLOCK (wrklock); \
89	if (!aio_buf) \
90	return -1;
91
92	typedef SV SV8; /* byte-sv, used for argument-checking */
93		214
94	enum {	215	enum {
95	REQ_QUIT,	216	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
96	REQ_OPEN, REQ_CLOSE,
97	REQ_READ, REQ_WRITE, REQ_READAHEAD,
98	REQ_SENDFILE,
99	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
100	REQ_FSYNC, REQ_FDATASYNC,
101	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
102	REQ_MKNOD, REQ_READDIR,
103	REQ_LINK, REQ_SYMLINK, REQ_READLINK,
104	REQ_GROUP, REQ_NOP,
105	REQ_BUSY,
106	};	217	};
107		218
108	#define AIO_REQ_KLASS "IO::AIO::REQ"	219	#include "libeio/eio.c"
109	#define AIO_GRP_KLASS "IO::AIO::GRP"
110		220
111	typedef struct aio_cb
112	{
113	struct aio_cb *volatile next;
114
115	SV *callback, *fh;
116	SV *sv1, *sv2;
117	void *ptr1, *ptr2;
118	off_t offs;
119	size_t size;
120	ssize_t result;
121
122	STRLEN stroffset;
123	int type;
124	int int1, int2;
125	int errorno;
126	mode_t mode; /* open */
127
128	unsigned char flags;
129	unsigned char pri;
130
131	SV *self; /* the perl counterpart of this request, if any */
132	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
133	} aio_cb;
134
135	enum {
136	FLAG_CANCELLED = 0x01, /* request was cancelled */
137	FLAG_SV1_RO_OFF = 0x40, /* data was set readonly */
138	FLAG_PTR2_FREE = 0x80, /* need to free(ptr2) */
139	};
140
141	typedef aio_cb *aio_req;	221	typedef eio_req *aio_req;
142	typedef aio_cb *aio_req_ornot;	222	typedef eio_req *aio_req_ornot;
143		223
144	enum {	224	static SV *on_next_submit;
145	PRI_MIN = -4,	225	static int next_pri = EIO_PRI_DEFAULT;
146	PRI_MAX = 4,	226	static int max_outstanding;
147		227
148	DEFAULT_PRI = 0,	228	static s_epipe respipe;
149	PRI_BIAS = -PRI_MIN,
150	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
151	};
152		229
153	#define AIO_TICKS ((1000000 + 1023) >> 10)
154
155	static unsigned int max_poll_time = 0;
156	static unsigned int max_poll_reqs = 0;
157
158	/* calculcate time difference in ~1/AIO_TICKS of a second */
159	static int tvdiff (struct timeval *tv1, struct timeval *tv2)
160	{
161	return (tv2->tv_sec - tv1->tv_sec ) * AIO_TICKS
162	+ ((tv2->tv_usec - tv1->tv_usec) >> 10);
163	}
164
165	static int next_pri = DEFAULT_PRI + PRI_BIAS;
166
167	static unsigned int started, idle, wanted;
168
169	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
170	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
171	#else
172	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
173	#endif
174
175	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
176	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
177
178	/* worker threads management */
179	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
180
181	typedef struct worker {
182	/* locked by wrklock */
183	struct worker *prev, *next;
184
185	pthread_t tid;
186
187	/* locked by reslock, reqlock or wrklock */
188	aio_req req; /* currently processed request */
189	void *dbuf;
190	DIR *dirp;
191	} worker;
192
193	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
194
195	static void worker_clear (worker *wrk)
196	{
197	if (wrk->dirp)
198	{
199	closedir (wrk->dirp);
200	wrk->dirp = 0;
201	}
202
203	if (wrk->dbuf)
204	{
205	free (wrk->dbuf);
206	wrk->dbuf = 0;
207	}
208	}
209
210	static void worker_free (worker *wrk)
211	{
212	wrk->next->prev = wrk->prev;
213	wrk->prev->next = wrk->next;
214
215	free (wrk);
216	}
217
218	static volatile unsigned int nreqs, nready, npending;
219	static volatile unsigned int max_idle = 4;
220	static volatile unsigned int max_outstanding = 0xffffffff;
221	static int respipe [2];
222
223	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
224	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
225	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
226
227	#if WORDACCESS_UNSAFE
228
229	static unsigned int get_nready ()
230	{
231	unsigned int retval;
232
233	LOCK (reqlock);
234	retval = nready;
235	UNLOCK (reqlock);
236
237	return retval;
238	}
239
240	static unsigned int get_npending ()
241	{
242	unsigned int retval;
243
244	LOCK (reslock);
245	retval = npending;
246	UNLOCK (reslock);
247
248	return retval;
249	}
250
251	static unsigned int get_nthreads ()
252	{
253	unsigned int retval;
254
255	LOCK (wrklock);
256	retval = started;
257	UNLOCK (wrklock);
258
259	return retval;
260	}
261
262	#else
263
264	# define get_nready() nready
265	# define get_npending() npending
266	# define get_nthreads() started
267
268	#endif
269
270	/*
271	* a somewhat faster data structure might be nice, but
272	* with 8 priorities this actually needs <20 insns
273	* per shift, the most expensive operation.
274	*/
275	typedef struct {
276	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
277	int size;
278	} reqq;
279
280	static reqq req_queue;
281	static reqq res_queue;
282
283	int reqq_push (reqq *q, aio_req req)
284	{
285	int pri = req->pri;
286	req->next = 0;
287
288	if (q->qe[pri])
289	{
290	q->qe[pri]->next = req;
291	q->qe[pri] = req;
292	}
293	else
294	q->qe[pri] = q->qs[pri] = req;
295
296	return q->size++;
297	}
298
299	aio_req reqq_shift (reqq *q)
300	{
301	int pri;
302
303	if (!q->size)
304	return 0;
305
306	--q->size;
307
308	for (pri = NUM_PRI; pri--; )
309	{
310	aio_req req = q->qs[pri];
311
312	if (req)
313	{
314	if (!(q->qs[pri] = req->next))
315	q->qe[pri] = 0;
316
317	return req;
318	}
319	}
320
321	abort ();
322	}
323
324	static int poll_cb ();
325	static void req_invoke (aio_req req);
326	static void req_free (aio_req req);	230	static void req_destroy (aio_req req);
327	static void req_cancel (aio_req req);	231	static void req_cancel (aio_req req);
328		232
		233	static void want_poll (void)
		234	{
		235	/* write a dummy byte to the pipe so fh becomes ready */
		236	s_epipe_signal (&respipe);
		237	}
		238
		239	static void done_poll (void)
		240	{
		241	/* read any signals sent by the worker threads */
		242	s_epipe_drain (&respipe);
		243	}
		244
329	/* must be called at most once */	245	/* must be called at most once */
330	static SV *req_sv (aio_req req, const char *klass)	246	static SV *req_sv (aio_req req, HV *stash)
331	{	247	{
332	if (!req->self)	248	if (!req->self)
333	{	249	{
334	req->self = (SV *)newHV ();	250	req->self = (SV *)newHV ();
335	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	251	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
336	}	252	}
337		253
338	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	254	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
339	}	255	}
340		256
341	static aio_req SvAIO_REQ (SV *sv)	257	static aio_req SvAIO_REQ (SV *sv)
342	{	258	{
343	MAGIC *mg;	259	MAGIC *mg;
344		260
345	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	261	if (!SvROK (sv)
		262	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		263	&& SvSTASH (SvRV (sv)) != aio_req_stash
		264	&& !sv_derived_from (sv, "IO::AIO::REQ")))
346	croak ("object of class " AIO_REQ_KLASS " expected");	265	croak ("object of class IO::AIO::REQ expected");
347		266
348	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	267	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
349		268
350	return mg ? (aio_req)mg->mg_ptr : 0;	269	return mg ? (aio_req)mg->mg_ptr : 0;
351	}	270	}
352		271
353	static void aio_grp_feed (aio_req grp)	272	static void aio_grp_feed (aio_req grp)
354	{	273	{
355	while (grp->size < grp->int2 && !(grp->flags & FLAG_CANCELLED))	274	if (grp->sv2 && SvOK (grp->sv2))
356	{	275	{
357	int old_len = grp->size;
358
359	if (grp->sv2 && SvOK (grp->sv2))
360	{
361	dSP;	276	dSP;
362		277
363	ENTER;	278	ENTER;
364	SAVETMPS;	279	SAVETMPS;
365	PUSHMARK (SP);	280	PUSHMARK (SP);
366	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	281	XPUSHs (req_sv (grp, aio_grp_stash));
367	PUTBACK;	282	PUTBACK;
368	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);	283	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
369	SPAGAIN;	284	SPAGAIN;
370	FREETMPS;	285	FREETMPS;
371	LEAVE;	286	LEAVE;
372	}
373
374	/* stop if no progress has been made */
375	if (old_len == grp->size)
376	{
377	SvREFCNT_dec (grp->sv2);
378	grp->sv2 = 0;
379	break;
380	}
381	}	287	}
382	}	288	}
383		289
384	static void aio_grp_dec (aio_req grp)	290	static void req_submit (eio_req *req)
385	{	291	{
386	--grp->size;	292	eio_submit (req);
387		293
388	/* call feeder, if applicable */	294	if (expect_false (on_next_submit))
389	aio_grp_feed (grp);
390
391	/* finish, if done */
392	if (!grp->size && grp->int1)
393	{	295	{
394	req_invoke (grp);	296	dSP;
395	req_free (grp);	297	SV *cb = sv_2mortal (on_next_submit);
		298
		299	on_next_submit = 0;
		300
		301	PUSHMARK (SP);
		302	PUTBACK;
		303	call_sv (cb, G_DISCARD | G_EVAL);
396	}	304	}
397	}	305	}
398		306
399	static void req_invoke (aio_req req)	307	static int req_invoke (eio_req *req)
400	{	308	{
401	dSP;
402
403	if (req->flags & FLAG_SV1_RO_OFF)	309	if (req->flags & FLAG_SV2_RO_OFF)
404	SvREADONLY_off (req->sv1);	310	SvREADONLY_off (req->sv2);
405		311
406	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	312	if (!EIO_CANCELLED (req) && req->callback)
407	{	313	{
		314	dSP;
		315	static SV *sv_result_cache; /* caches the result integer SV */
		316	SV *sv_result;
		317
408	ENTER;	318	ENTER;
409	SAVETMPS;	319	SAVETMPS;
410	PUSHMARK (SP);	320	PUSHMARK (SP);
411	EXTEND (SP, 1);	321	EXTEND (SP, 1);
412		322
		323	/* do not recreate the result IV from scratch each time */
		324	if (expect_true (sv_result_cache))
		325	{
		326	sv_result = sv_result_cache; sv_result_cache = 0;
		327	SvIV_set (sv_result, req->result);
		328	}
		329	else
		330	{
		331	sv_result = newSViv (req->result);
		332	SvREADONLY_on (sv_result);
		333	}
		334
413	switch (req->type)	335	switch (req->type)
414	{	336	{
415	case REQ_READDIR:	337	case EIO_READDIR:
416	{	338	{
417	SV *rv = &PL_sv_undef;	339	SV *rv = &PL_sv_undef;
418		340
419	if (req->result >= 0)	341	if (req->result >= 0)
420	{	342	{
421	int i;	343	int i;
422	char *buf = req->ptr2;	344	char *names = (char *)req->ptr2;
		345	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
423	AV *av = newAV ();	346	AV *av = newAV ();
424		347
425	av_extend (av, req->result - 1);	348	av_extend (av, req->result - 1);
426		349
427	for (i = 0; i < req->result; ++i)	350	for (i = 0; i < req->result; ++i)
428	{	351	{
429	SV *sv = newSVpv (buf, 0);	352	if (req->int1 & EIO_READDIR_DENTS)
		353	{
		354	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
430		355
		356	if (req->int1 & EIO_READDIR_CUSTOM2)
		357	{
		358	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		359	AV *avent = newAV ();
		360
		361	av_extend (avent, 2);
		362
		363	if (!sv_type [ent->type])
		364	{
		365	sv_type [ent->type] = newSViv (ent->type);
		366	SvREADONLY_on (sv_type [ent->type]);
		367	}
		368
		369	av_store (avent, 0, namesv);
		370	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		371	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		372
		373	av_store (av, i, newRV_noinc ((SV *)avent));
		374	}
		375	else
431	av_store (av, i, sv);	376	av_store (av, i, namesv);
		377
		378	++ent;
		379	}
		380	else
		381	{
		382	SV *name = newSVpv (names, 0);
		383	av_store (av, i, name);
432	buf += SvCUR (sv) + 1;	384	names += SvCUR (name) + 1;
		385	}
433	}	386	}
434		387
435	rv = sv_2mortal (newRV_noinc ((SV *)av));	388	rv = sv_2mortal (newRV_noinc ((SV *)av));
436	}	389	}
437		390
438	PUSHs (rv);	391	PUSHs (rv);
		392
		393	if (req->int1 & EIO_READDIR_CUSTOM1)
		394	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
439	}	395	}
440	break;	396	break;
441		397
442	case REQ_OPEN:	398	case EIO_OPEN:
443	{	399	{
444	/* convert fd to fh */	400	/* convert fd to fh */
445	SV *fh;	401	SV *fh = &PL_sv_undef;
446		402
447	PUSHs (sv_2mortal (newSViv (req->result)));	403	if (req->result >= 0)
448	PUTBACK;	404	{
449	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	405	GV *gv = (GV *)sv_newmortal ();
450	SPAGAIN;	406	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		407	char sym [64];
		408	int symlen;
		409
		410	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		411	gv_init (gv, aio_stash, sym, symlen, 0);
451		412
452	fh = POPs;	413	symlen = snprintf (
453	PUSHMARK (SP);	414	sym,
		415	sizeof (sym),
		416	"%s&=%d",
		417	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		418	(int)req->result
		419	);
		420
		421	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		422	fh = (SV *)gv;
		423	}
		424
454	XPUSHs (fh);	425	PUSHs (fh);
455	}	426	}
456	break;	427	break;
457		428
		429	case EIO_STATVFS:
		430	case EIO_FSTATVFS:
		431	{
		432	SV *rv = &PL_sv_undef;
		433
		434	if (req->result >= 0)
		435	{
		436	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		437	HV *hv = newHV ();
		438
		439	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		440
		441	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		442	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		443	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		444	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		445	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		446	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		447	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		448	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		449	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		450	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		451	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		452	}
		453
		454	PUSHs (rv);
		455	}
		456
		457	break;
		458
458	case REQ_GROUP:	459	case EIO_GROUP:
459	req->int1 = 2; /* mark group as finished */	460	req->int1 = 2; /* mark group as finished */
460		461
461	if (req->sv1)	462	if (req->sv1)
462	{	463	{
463	int i;	464	int i;
…		…
467	for (i = 0; i <= AvFILL (av); ++i)	468	for (i = 0; i <= AvFILL (av); ++i)
468	PUSHs (*av_fetch (av, i, 0));	469	PUSHs (*av_fetch (av, i, 0));
469	}	470	}
470	break;	471	break;
471		472
472	case REQ_NOP:	473	case EIO_NOP:
473	case REQ_BUSY:	474	case EIO_BUSY:
474	break;	475	break;
475		476
476	case REQ_READLINK:	477	case EIO_READLINK:
477	if (req->result > 0)	478	if (req->result > 0)
478	{	479	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
479	SvCUR_set (req->sv1, req->result);
480	*SvEND (req->sv1) = 0;
481	PUSHs (req->sv1);
482	}
483	break;	480	break;
484		481
485	case REQ_STAT:	482	case EIO_STAT:
486	case REQ_LSTAT:	483	case EIO_LSTAT:
487	case REQ_FSTAT:	484	case EIO_FSTAT:
488	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;	485	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
489	PL_laststatval = req->result;	486	PL_laststatval = req->result;
490	PL_statcache = *(Stat_t *)(req->ptr2);	487	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
491	PUSHs (sv_2mortal (newSViv (req->result)));	488	PUSHs (sv_result);
492	break;	489	break;
493		490
494	case REQ_READ:	491	case EIO_READ:
		492	{
495	SvCUR_set (req->sv1, req->stroffset + (req->result > 0 ? req->result : 0));	493	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
496	*SvEND (req->sv1) = 0;	494	*SvEND (req->sv2) = 0;
497	PUSHs (sv_2mortal (newSViv (req->result)));	495	SvPOK_only (req->sv2);
		496	SvSETMAGIC (req->sv2);
		497	PUSHs (sv_result);
		498	}
498	break;	499	break;
499		500
		501	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		502	if (req->result > 0)
		503	SvIV_set (sv_result, 0);
		504	/* FALLTHROUGH */
		505
500	default:	506	default:
501	PUSHs (sv_2mortal (newSViv (req->result)));	507	PUSHs (sv_result);
502	break;	508	break;
503	}	509	}
504		510
505	errno = req->errorno;	511	errno = req->errorno;
506		512
507	PUTBACK;	513	PUTBACK;
508	call_sv (req->callback, G_VOID | G_EVAL);	514	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
509	SPAGAIN;	515	SPAGAIN;
		516
		517	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		518	SvREFCNT_dec (sv_result);
		519	else
		520	sv_result_cache = sv_result;
510		521
511	FREETMPS;	522	FREETMPS;
512	LEAVE;	523	LEAVE;
		524
		525	PUTBACK;
513	}	526	}
514		527
515	if (req->grp)	528	return !!SvTRUE (ERRSV);
516	{
517	aio_req grp = req->grp;
518
519	/* unlink request */
520	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
521	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
522
523	if (grp->grp_first == req)
524	grp->grp_first = req->grp_next;
525
526	aio_grp_dec (grp);
527	}
528
529	if (SvTRUE (ERRSV))
530	{
531	req_free (req);
532	croak (0);
533	}
534	}	529	}
535		530
536	static void req_free (aio_req req)	531	static void req_destroy (aio_req req)
537	{	532	{
538	if (req->self)	533	if (req->self)
539	{	534	{
540	sv_unmagic (req->self, PERL_MAGIC_ext);	535	sv_unmagic (req->self, PERL_MAGIC_ext);
541	SvREFCNT_dec (req->self);	536	SvREFCNT_dec (req->self);
542	}	537	}
543		538
544	SvREFCNT_dec (req->fh);
545	SvREFCNT_dec (req->sv1);	539	SvREFCNT_dec (req->sv1);
546	SvREFCNT_dec (req->sv2);	540	SvREFCNT_dec (req->sv2);
547	SvREFCNT_dec (req->callback);	541	SvREFCNT_dec (req->callback);
548		542
549	if (req->flags & FLAG_PTR2_FREE)
550	free (req->ptr2);
551
552	Safefree (req);	543	Safefree (req);
553	}	544	}
554		545
555	static void req_cancel_subs (aio_req grp)	546	static void req_cancel_subs (aio_req grp)
556	{	547	{
557	aio_req sub;	548	aio_req sub;
558		549
559	if (grp->type != REQ_GROUP)	550	if (grp->type != EIO_GROUP)
560	return;	551	return;
561		552
562	SvREFCNT_dec (grp->sv2);	553	SvREFCNT_dec (grp->sv2);
563	grp->sv2 = 0;	554	grp->sv2 = 0;
564		555
565	for (sub = grp->grp_first; sub; sub = sub->grp_next)	556	eio_grp_cancel (grp);
566	req_cancel (sub);
567	}	557	}
568		558
569	static void req_cancel (aio_req req)	559	static void
		560	create_respipe (void)
570	{	561	{
571	req->flags |= FLAG_CANCELLED;	562	if (s_epipe_renew (&respipe))
572		563	croak ("IO::AIO: unable to initialize result pipe");
573	req_cancel_subs (req);
574	}	564	}
575		565
576	static void *aio_proc(void *arg);
577
578	static void start_thread (void)
579	{
580	sigset_t fullsigset, oldsigset;
581	pthread_attr_t attr;
582
583	worker *wrk = calloc (1, sizeof (worker));
584
585	if (!wrk)
586	croak ("unable to allocate worker thread data");
587
588	pthread_attr_init (&attr);
589	pthread_attr_setstacksize (&attr, STACKSIZE);
590	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
591	#ifdef PTHREAD_SCOPE_PROCESS
592	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
593	#endif
594
595	sigfillset (&fullsigset);
596
597	LOCK (wrklock);
598	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
599
600	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
601	{
602	wrk->prev = &wrk_first;
603	wrk->next = wrk_first.next;
604	wrk_first.next->prev = wrk;
605	wrk_first.next = wrk;
606	++started;
607	}
608	else
609	free (wrk);
610
611	sigprocmask (SIG_SETMASK, &oldsigset, 0);
612	UNLOCK (wrklock);
613	}
614
615	static void maybe_start_thread ()
616	{
617	if (get_nthreads () >= wanted)
618	return;
619
620	/* todo: maybe use idle here, but might be less exact */
621	if (0 <= (int)get_nthreads () + (int)get_npending () - (int)nreqs)
622	return;
623
624	start_thread ();
625	}
626
627	static void req_send (aio_req req)
628	{
629	++nreqs;
630
631	LOCK (reqlock);
632	++nready;
633	reqq_push (&req_queue, req);
634	pthread_cond_signal (&reqwait);
635	UNLOCK (reqlock);
636
637	maybe_start_thread ();
638	}
639
640	static void end_thread (void)
641	{
642	aio_req req;
643
644	Newz (0, req, 1, aio_cb);
645
646	req->type = REQ_QUIT;
647	req->pri = PRI_MAX + PRI_BIAS;
648
649	LOCK (reqlock);
650	reqq_push (&req_queue, req);
651	pthread_cond_signal (&reqwait);
652	UNLOCK (reqlock);
653
654	LOCK (wrklock);
655	--started;
656	UNLOCK (wrklock);
657	}
658
659	static void set_max_idle (int nthreads)
660	{
661	if (WORDACCESS_UNSAFE) LOCK (reqlock);
662	max_idle = nthreads <= 0 ? 1 : nthreads;
663	if (WORDACCESS_UNSAFE) UNLOCK (reqlock);
664	}
665
666	static void min_parallel (int nthreads)
667	{
668	if (wanted < nthreads)
669	wanted = nthreads;
670	}
671
672	static void max_parallel (int nthreads)
673	{
674	if (wanted > nthreads)
675	wanted = nthreads;
676
677	while (started > wanted)
678	end_thread ();
679	}
680
681	static void poll_wait ()	566	static void poll_wait (void)
682	{	567	{
683	fd_set rfd;
684
685	while (nreqs)	568	while (eio_nreqs ())
686	{	569	{
687	int size;	570	int size;
688	if (WORDACCESS_UNSAFE) LOCK (reslock);	571
		572	X_LOCK (reslock);
689	size = res_queue.size;	573	size = res_queue.size;
690	if (WORDACCESS_UNSAFE) UNLOCK (reslock);	574	X_UNLOCK (reslock);
691		575
692	if (size)	576	if (size)
693	return;	577	return;
694		578
695	maybe_start_thread ();	579	etp_maybe_start_thread ();
696		580
697	FD_ZERO(&rfd);	581	s_epipe_wait (&respipe);
698	FD_SET(respipe [0], &rfd);
699
700	select (respipe [0] + 1, &rfd, 0, 0, 0);
701	}	582	}
702	}	583	}
703		584
704	static int poll_cb ()	585	static int poll_cb (void)
705	{	586	{
706	dSP;
707	int count = 0;
708	int maxreqs = max_poll_reqs;
709	int do_croak = 0;
710	struct timeval tv_start, tv_now;
711	aio_req req;
712
713	if (max_poll_time)
714	gettimeofday (&tv_start, 0);
715
716	for (;;)	587	for (;;)
717	{	588	{
718	for (;;)	589	int res = eio_poll ();
719	{
720	maybe_start_thread ();
721		590
722	LOCK (reslock);	591	if (res > 0)
723	req = reqq_shift (&res_queue);
724
725	if (req)
726	{
727	--npending;
728
729	if (!res_queue.size)
730	{
731	/* read any signals sent by the worker threads */
732	char buf [32];
733	while (read (respipe [0], buf, 32) == 32)
734	;
735	}
736	}
737
738	UNLOCK (reslock);
739
740	if (!req)
741	break;
742
743	--nreqs;
744
745	if (req->type == REQ_GROUP && req->size)
746	{
747	req->int1 = 1; /* mark request as delayed */
748	continue;
749	}
750	else
751	{
752	req_invoke (req);
753
754	count++;
755	}
756
757	req_free (req);
758
759	if (maxreqs && !--maxreqs)
760	break;
761
762	if (max_poll_time)
763	{
764	gettimeofday (&tv_now, 0);
765
766	if (tvdiff (&tv_start, &tv_now) >= max_poll_time)
767	break;
768	}
769	}
770
771	if (nreqs <= max_outstanding)
772	break;	592	croak (0);
		593
		594	if (!max_outstanding || max_outstanding > eio_nreqs ())
		595	return res;
773		596
774	poll_wait ();	597	poll_wait ();
775
776	++maxreqs;
777	}	598	}
778
779	return count;
780	}	599	}
781		600
782	static void create_pipe ()	601	static void atfork_child (void)
783	{	602	{
784	if (pipe (respipe))	603	create_respipe ();
785	croak ("unable to initialize result pipe");
786
787	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
788	croak ("cannot set result pipe to nonblocking mode");
789
790	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
791	croak ("cannot set result pipe to nonblocking mode");
792	}	604	}
793		605
794	/*****************************************************************************/	606	/*****************************************************************************/
795	/* work around various missing functions */
796		607
797	#if !HAVE_PREADWRITE	608	#if !_POSIX_MAPPED_FILES
798	# define pread aio_pread	609	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
799	# define pwrite aio_pwrite	610	# define munmap(addr,length) (errno = ENOSYS, -1)
800
801	/*
802	* make our pread/pwrite safe against themselves, but not against
803	* normal read/write by using a mutex. slows down execution a lot,
804	* but that's your problem, not mine.
805	*/
806	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
807
808	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
809	{
810	ssize_t res;
811	off_t ooffset;
812
813	LOCK (preadwritelock);
814	ooffset = lseek (fd, 0, SEEK_CUR);
815	lseek (fd, offset, SEEK_SET);
816	res = read (fd, buf, count);
817	lseek (fd, ooffset, SEEK_SET);
818	UNLOCK (preadwritelock);
819
820	return res;
821	}
822
823	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
824	{
825	ssize_t res;
826	off_t ooffset;
827
828	LOCK (preadwritelock);
829	ooffset = lseek (fd, 0, SEEK_CUR);
830	lseek (fd, offset, SEEK_SET);
831	res = write (fd, buf, count);
832	lseek (fd, offset, SEEK_SET);
833	UNLOCK (preadwritelock);
834
835	return res;
836	}
837	#endif
838
839	#if !HAVE_FDATASYNC
840	# define fdatasync fsync
841	#endif
842
843	#if !HAVE_READAHEAD
844	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
845
846	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
847	{
848	dBUF;
849
850	while (count > 0)
851	{
852	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
853
854	pread (fd, aio_buf, len, offset);
855	offset += len;
856	count -= len;
857	}
858
859	errno = 0;
860	}
861
862	#endif
863
864	#if !HAVE_READDIR_R
865	# define readdir_r aio_readdir_r
866
867	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
868
869	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
870	{
871	struct dirent *e;
872	int errorno;
873
874	LOCK (readdirlock);
875
876	e = readdir (dirp);
877	errorno = errno;
878
879	if (e)
880	{
881	*res = ent;
882	strcpy (ent->d_name, e->d_name);
883	}
884	else
885	*res = 0;
886
887	UNLOCK (readdirlock);
888
889	errno = errorno;
890	return e ? 0 : -1;
891	}
892	#endif
893
894	/* sendfile always needs emulation */
895	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
896	{
897	ssize_t res;
898
899	if (!count)
900	return 0;
901
902	#if HAVE_SENDFILE
903	# if __linux
904	res = sendfile (ofd, ifd, &offset, count);
905
906	# elif __freebsd
907	/*
908	* Of course, the freebsd sendfile is a dire hack with no thoughts
909	* wasted on making it similar to other I/O functions.
910	*/
911	{
912	off_t sbytes;
913	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
914
915	if (res < 0 && sbytes)
916	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
917	res = sbytes;
918	}
919
920	# elif __hpux
921	res = sendfile (ofd, ifd, offset, count, 0, 0);
922
923	# elif __solaris
924	{
925	struct sendfilevec vec;
926	size_t sbytes;
927
928	vec.sfv_fd = ifd;
929	vec.sfv_flag = 0;
930	vec.sfv_off = offset;
931	vec.sfv_len = count;
932
933	res = sendfilev (ofd, &vec, 1, &sbytes);
934
935	if (res < 0 && sbytes)
936	res = sbytes;
937	}
938
939	# endif	611	#endif
940	#else
941	res = -1;
942	errno = ENOSYS;
943	#endif
944		612
945	if (res < 0	613	#define MMAP_MAGIC PERL_MAGIC_ext
946	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
947	#if __solaris
948	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
949	#endif
950	)
951	)
952	{
953	/* emulate sendfile. this is a major pain in the ass */
954	dBUF;
955		614
956	res = 0;	615	static int
		616	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		617	{
		618	int old_errno = errno;
		619	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		620	errno = old_errno;
957		621
958	while (count)	622	mg->mg_obj = 0; /* just in case */
959	{
960	ssize_t cnt;
961
962	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
963		623
964	if (cnt <= 0)	624	SvREADONLY_off (sv);
965	{
966	if (cnt && !res) res = -1;
967	break;
968	}
969		625
970	cnt = write (ofd, aio_buf, cnt);	626	if (SvPVX (sv) != mg->mg_ptr)
		627	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
971		628
972	if (cnt <= 0)	629	SvCUR_set (sv, 0);
973	{	630	SvPVX (sv) = 0;
974	if (cnt && !res) res = -1;	631	SvOK_off (sv);
975	break;
976	}
977		632
978	offset += cnt;
979	res += cnt;
980	count -= cnt;
981	}
982	}
983
984	return res;	633	return 0;
985	}	634	}
986		635
987	/* read a full directory */	636	static MGVTBL mmap_vtbl = {
988	static void scandir_ (aio_req req, worker *self)	637	0, 0, 0, 0, mmap_free
989	{	638	};
990	DIR *dirp;
991	union
992	{
993	struct dirent d;
994	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
995	} *u;
996	struct dirent *entp;
997	char *name, *names;
998	int memlen = 4096;
999	int memofs = 0;
1000	int res = 0;
1001	int errorno;
1002
1003	LOCK (wrklock);
1004	self->dirp = dirp = opendir (req->ptr1);
1005	self->dbuf = u = malloc (sizeof (*u));
1006	req->flags |= FLAG_PTR2_FREE;
1007	req->ptr2 = names = malloc (memlen);
1008	UNLOCK (wrklock);
1009
1010	if (dirp && u && names)
1011	for (;;)
1012	{
1013	errno = 0;
1014	readdir_r (dirp, &u->d, &entp);
1015
1016	if (!entp)
1017	break;
1018
1019	name = entp->d_name;
1020
1021	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
1022	{
1023	int len = strlen (name) + 1;
1024
1025	res++;
1026
1027	while (memofs + len > memlen)
1028	{
1029	memlen *= 2;
1030	LOCK (wrklock);
1031	req->ptr2 = names = realloc (names, memlen);
1032	UNLOCK (wrklock);
1033
1034	if (!names)
1035	break;
1036	}
1037
1038	memcpy (names + memofs, name, len);
1039	memofs += len;
1040	}
1041	}
1042
1043	if (errno)
1044	res = -1;
1045
1046	req->result = res;
1047	}
1048		639
1049	/*****************************************************************************/	640	/*****************************************************************************/
1050		641
1051	static void *aio_proc (void *thr_arg)	642	static SV *
		643	get_cb (SV *cb_sv)
1052	{	644	{
1053	aio_req req;	645	SvGETMAGIC (cb_sv);
1054	struct timespec ts;	646	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1055	worker *self = (worker *)thr_arg;
1056
1057	/* try to distribute timeouts somewhat evenly */
1058	ts.tv_nsec = (((unsigned long)self + (unsigned long)ts.tv_sec) & 1023UL)
1059	* (1000000000UL / 1024UL);
1060
1061	for (;;)
1062	{
1063	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1064
1065	LOCK (reqlock);
1066
1067	for (;;)
1068	{
1069	self->req = req = reqq_shift (&req_queue);
1070
1071	if (req)
1072	break;
1073
1074	++idle;
1075
1076	if (pthread_cond_timedwait (&reqwait, &reqlock, &ts)
1077	== ETIMEDOUT)
1078	{
1079	if (idle > max_idle)
1080	{
1081	--idle;
1082	UNLOCK (reqlock);
1083	LOCK (wrklock);
1084	--started;
1085	UNLOCK (wrklock);
1086	goto quit;
1087	}
1088
1089	/* we are allowed to idle, so do so without any timeout */
1090	pthread_cond_wait (&reqwait, &reqlock);
1091	ts.tv_sec = time (0) + IDLE_TIMEOUT;
1092	}
1093
1094	--idle;
1095	}
1096
1097	--nready;
1098
1099	UNLOCK (reqlock);
1100
1101	errno = 0; /* strictly unnecessary */
1102
1103	if (!(req->flags & FLAG_CANCELLED))
1104	switch (req->type)
1105	{
1106	case REQ_READ: req->result = pread (req->int1, req->ptr1, req->size, req->offs); break;
1107	case REQ_WRITE: req->result = pwrite (req->int1, req->ptr1, req->size, req->offs); break;
1108
1109	case REQ_READAHEAD: req->result = readahead (req->int1, req->offs, req->size); break;
1110	case REQ_SENDFILE: req->result = sendfile_ (req->int1, req->int2, req->offs, req->size, self); break;
1111
1112	case REQ_STAT: req->result = stat (req->ptr1, (Stat_t *)req->ptr2); break;
1113	case REQ_LSTAT: req->result = lstat (req->ptr1, (Stat_t *)req->ptr2); break;
1114	case REQ_FSTAT: req->result = fstat (req->int1, (Stat_t *)req->ptr2); break;
1115
1116	case REQ_OPEN: req->result = open (req->ptr1, req->int1, req->mode); break;
1117	case REQ_CLOSE: req->result = close (req->int1); break;
1118	case REQ_UNLINK: req->result = unlink (req->ptr1); break;
1119	case REQ_RMDIR: req->result = rmdir (req->ptr1); break;
1120	case REQ_RENAME: req->result = rename (req->ptr2, req->ptr1); break;
1121	case REQ_LINK: req->result = link (req->ptr2, req->ptr1); break;
1122	case REQ_SYMLINK: req->result = symlink (req->ptr2, req->ptr1); break;
1123	case REQ_MKNOD: req->result = mknod (req->ptr2, req->mode, (dev_t)req->offs); break;
1124	case REQ_READLINK: req->result = readlink (req->ptr2, req->ptr1, NAME_MAX); break;
1125
1126	case REQ_FDATASYNC: req->result = fdatasync (req->int1); break;
1127	case REQ_FSYNC: req->result = fsync (req->int1); break;
1128	case REQ_READDIR: scandir_ (req, self); break;
1129
1130	case REQ_BUSY:
1131	{
1132	struct timeval tv;
1133
1134	tv.tv_sec = req->int1;
1135	tv.tv_usec = req->int2;
1136
1137	req->result = select (0, 0, 0, 0, &tv);
1138	}
1139
1140	case REQ_GROUP:
1141	case REQ_NOP:
1142	break;
1143
1144	case REQ_QUIT:
1145	goto quit;
1146
1147	default:
1148	req->result = ENOSYS;
1149	break;
1150	}
1151
1152	req->errorno = errno;
1153
1154	LOCK (reslock);
1155
1156	++npending;
1157
1158	if (!reqq_push (&res_queue, req))
1159	/* write a dummy byte to the pipe so fh becomes ready */
1160	write (respipe [1], &respipe, 1);
1161
1162	self->req = 0;
1163	worker_clear (self);
1164
1165	UNLOCK (reslock);
1166	}
1167
1168	quit:
1169	LOCK (wrklock);
1170	worker_free (self);
1171	UNLOCK (wrklock);
1172
1173	return 0;
1174	}
1175
1176	/*****************************************************************************/
1177
1178	static void atfork_prepare (void)
1179	{
1180	LOCK (wrklock);
1181	LOCK (reqlock);
1182	LOCK (reslock);
1183	#if !HAVE_PREADWRITE
1184	LOCK (preadwritelock);
1185	#endif
1186	#if !HAVE_READDIR_R
1187	LOCK (readdirlock);
1188	#endif
1189	}
1190
1191	static void atfork_parent (void)
1192	{
1193	#if !HAVE_READDIR_R
1194	UNLOCK (readdirlock);
1195	#endif
1196	#if !HAVE_PREADWRITE
1197	UNLOCK (preadwritelock);
1198	#endif
1199	UNLOCK (reslock);
1200	UNLOCK (reqlock);
1201	UNLOCK (wrklock);
1202	}
1203
1204	static void atfork_child (void)
1205	{
1206	aio_req prv;
1207
1208	while (prv = reqq_shift (&req_queue))
1209	req_free (prv);
1210
1211	while (prv = reqq_shift (&res_queue))
1212	req_free (prv);
1213
1214	while (wrk_first.next != &wrk_first)
1215	{
1216	worker *wrk = wrk_first.next;
1217
1218	if (wrk->req)
1219	req_free (wrk->req);
1220
1221	worker_clear (wrk);
1222	worker_free (wrk);
1223	}
1224
1225	started = 0;
1226	idle = 0;
1227	nreqs = 0;
1228	nready = 0;
1229	npending = 0;
1230
1231	close (respipe [0]);
1232	close (respipe [1]);
1233	create_pipe ();
1234
1235	atfork_parent ();
1236	}	647	}
1237		648
1238	#define dREQ \	649	#define dREQ \
		650	SV *cb_cv; \
1239	aio_req req; \	651	aio_req req; \
1240	int req_pri = next_pri; \	652	int req_pri = next_pri; \
1241	next_pri = DEFAULT_PRI + PRI_BIAS; \	653	next_pri = EIO_PRI_DEFAULT; \
1242	\	654	\
1243	if (SvOK (callback) && !SvROK (callback)) \	655	cb_cv = get_cb (callback); \
1244	croak ("callback must be undef or of reference type"); \
1245	\	656	\
1246	Newz (0, req, 1, aio_cb); \	657	Newz (0, req, 1, eio_req); \
1247	if (!req) \	658	if (!req) \
1248	croak ("out of memory during aio_req allocation"); \	659	croak ("out of memory during eio_req allocation"); \
1249	\	660	\
1250	req->callback = newSVsv (callback); \	661	req->callback = SvREFCNT_inc (cb_cv); \
1251	req->pri = req_pri	662	req->pri = req_pri
1252		663
1253	#define REQ_SEND \	664	#define REQ_SEND \
		665	PUTBACK; \
1254	req_send (req); \	666	req_submit (req); \
		667	SPAGAIN; \
1255	\	668	\
1256	if (GIMME_V != G_VOID) \	669	if (GIMME_V != G_VOID) \
1257	XPUSHs (req_sv (req, AIO_REQ_KLASS));	670	XPUSHs (req_sv (req, aio_req_stash));
1258		671
1259	MODULE = IO::AIO PACKAGE = IO::AIO	672	MODULE = IO::AIO PACKAGE = IO::AIO
1260		673
1261	PROTOTYPES: ENABLE	674	PROTOTYPES: ENABLE
1262		675
1263	BOOT:	676	BOOT:
1264	{	677	{
		678	static const struct {
		679	const char *name;
		680	IV iv;
		681	} *civ, const_iv[] = {
		682	# define const_niv(name, value) { # name, (IV) value },
		683	# define const_iv(name) { # name, (IV) name },
		684	# define const_eio(name) { # name, (IV) EIO_ ## name },
		685	const_iv (EXDEV)
		686	const_iv (ENOSYS)
		687	const_iv (O_RDONLY)
		688	const_iv (O_WRONLY)
		689	const_iv (O_RDWR)
		690	const_iv (O_CREAT)
		691	const_iv (O_TRUNC)
		692	const_iv (O_EXCL)
		693	const_iv (O_APPEND)
		694	#ifndef _WIN32
		695	const_iv (S_IFIFO)
		696	#endif
		697	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		698	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		699	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		700	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		701	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		702	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		703
		704	const_iv (ST_RDONLY)
		705	const_iv (ST_NOSUID)
		706	const_iv (ST_NODEV)
		707	const_iv (ST_NOEXEC)
		708	const_iv (ST_SYNCHRONOUS)
		709	const_iv (ST_MANDLOCK)
		710	const_iv (ST_WRITE)
		711	const_iv (ST_APPEND)
		712	const_iv (ST_IMMUTABLE)
		713	const_iv (ST_NOATIME)
		714	const_iv (ST_NODIRATIME)
		715	const_iv (ST_RELATIME)
		716
		717	const_iv (PROT_EXEC)
		718	const_iv (PROT_NONE)
		719	const_iv (PROT_READ)
		720	const_iv (PROT_WRITE)
		721
		722	/*const_iv (MAP_FIXED)*/
		723	const_iv (MAP_PRIVATE)
		724	const_iv (MAP_SHARED)
		725	const_iv (MAP_ANONYMOUS)
		726
		727	/* linuxish */
		728	const_iv (MAP_HUGETLB)
		729	const_iv (MAP_LOCKED)
		730	const_iv (MAP_NORESERVE)
		731	const_iv (MAP_POPULATE)
		732	const_iv (MAP_NONBLOCK)
		733
		734	const_iv (MCL_FUTURE)
		735	const_iv (MCL_CURRENT)
		736
		737	const_eio (MS_ASYNC)
		738	const_eio (MS_INVALIDATE)
		739	const_eio (MS_SYNC)
		740
		741	const_eio (MT_MODIFY)
		742
		743	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		744	const_eio (SYNC_FILE_RANGE_WRITE)
		745	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		746
		747	const_eio (READDIR_DENTS)
		748	const_eio (READDIR_DIRS_FIRST)
		749	const_eio (READDIR_STAT_ORDER)
		750	const_eio (READDIR_FOUND_UNKNOWN)
		751
		752	const_eio (DT_UNKNOWN)
		753	const_eio (DT_FIFO)
		754	const_eio (DT_CHR)
		755	const_eio (DT_DIR)
		756	const_eio (DT_BLK)
		757	const_eio (DT_REG)
		758	const_eio (DT_LNK)
		759	const_eio (DT_SOCK)
		760	const_eio (DT_WHT)
		761	};
		762
1265	HV *stash = gv_stashpv ("IO::AIO", 1);	763	aio_stash = gv_stashpv ("IO::AIO" , 1);
		764	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		765	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1266		766
1267	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	767	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1268	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	768	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1269	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1270	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1271	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1272	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1273		769
		770	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		771
1274	create_pipe ();	772	create_respipe ();
1275	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);	773
		774	if (eio_init (want_poll, done_poll) < 0)
		775	croak ("IO::AIO: unable to initialise eio library");
		776
		777	/* atfork child called in fifo order, so before eio's handler */
		778	X_THREAD_ATFORK (0, 0, atfork_child);
1276	}	779	}
1277		780
1278	void	781	void
1279	max_poll_reqs (int nreqs)	782	max_poll_reqs (int nreqs)
1280	PROTOTYPE: $	783	PROTOTYPE: $
1281	CODE:	784	CODE:
1282	max_poll_reqs = nreqs;	785	eio_set_max_poll_reqs (nreqs);
1283		786
1284	void	787	void
1285	max_poll_time (double nseconds)	788	max_poll_time (double nseconds)
1286	PROTOTYPE: $	789	PROTOTYPE: $
1287	CODE:	790	CODE:
1288	max_poll_time = nseconds * AIO_TICKS;	791	eio_set_max_poll_time (nseconds);
1289		792
1290	void	793	void
1291	min_parallel (int nthreads)	794	min_parallel (int nthreads)
1292	PROTOTYPE: $	795	PROTOTYPE: $
		796	CODE:
		797	eio_set_min_parallel (nthreads);
1293		798
1294	void	799	void
1295	max_parallel (int nthreads)	800	max_parallel (int nthreads)
1296	PROTOTYPE: $	801	PROTOTYPE: $
		802	CODE:
		803	eio_set_max_parallel (nthreads);
1297		804
1298	void	805	void
1299	max_idle (int nthreads)	806	max_idle (int nthreads)
1300	PROTOTYPE: $	807	PROTOTYPE: $
1301	CODE:	808	CODE:
1302	set_max_idle (nthreads);	809	eio_set_max_idle (nthreads);
1303		810
1304	int	811	void
1305	max_outstanding (int maxreqs)	812	max_outstanding (int maxreqs)
1306	PROTOTYPE: $	813	PROTOTYPE: $
1307	CODE:	814	CODE:
1308	RETVAL = max_outstanding;
1309	max_outstanding = maxreqs;	815	max_outstanding = maxreqs;
1310	OUTPUT:
1311	RETVAL
1312		816
1313	void	817	void
1314	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	818	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1315	SV8 * pathname
1316	int flags
1317	int mode
1318	SV * callback
1319	PROTOTYPE: $$$;$	819	PROTOTYPE: $$$;$
1320	PPCODE:	820	PPCODE:
1321	{	821	{
1322	dREQ;	822	dREQ;
1323		823
1324	req->type = REQ_OPEN;	824	req->type = EIO_OPEN;
1325	req->sv1 = newSVsv (pathname);	825	req->sv1 = newSVsv (pathname);
1326	req->ptr1 = SvPVbyte_nolen (req->sv1);	826	req->ptr1 = SvPVbyte_nolen (req->sv1);
1327	req->int1 = flags;	827	req->int1 = flags;
1328	req->mode = mode;	828	req->int2 = mode;
1329		829
1330	REQ_SEND;	830	REQ_SEND;
1331	}	831	}
1332		832
1333	void	833	void
1334	aio_close (fh,callback=&PL_sv_undef)	834	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1335	SV * fh
1336	SV * callback
1337	PROTOTYPE: $;$	835	PROTOTYPE: $;$
1338	ALIAS:	836	ALIAS:
1339	aio_close = REQ_CLOSE
1340	aio_fsync = REQ_FSYNC	837	aio_fsync = EIO_FSYNC
1341	aio_fdatasync = REQ_FDATASYNC	838	aio_fdatasync = EIO_FDATASYNC
1342	PPCODE:	839	PPCODE:
1343	{	840	{
		841	int fd = s_fileno_croak (fh, 0);
1344	dREQ;	842	dREQ;
1345		843
1346	req->type = ix;	844	req->type = ix;
1347	req->fh = newSVsv (fh);	845	req->sv1 = newSVsv (fh);
1348	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	846	req->int1 = fd;
1349		847
1350	REQ_SEND (req);	848	REQ_SEND (req);
1351	}	849	}
1352		850
1353	void	851	void
		852	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		853	PROTOTYPE: $$$$;$
		854	PPCODE:
		855	{
		856	int fd = s_fileno_croak (fh, 0);
		857	dREQ;
		858
		859	req->type = EIO_SYNC_FILE_RANGE;
		860	req->sv1 = newSVsv (fh);
		861	req->int1 = fd;
		862	req->offs = offset;
		863	req->size = nbytes;
		864	req->int2 = flags;
		865
		866	REQ_SEND (req);
		867	}
		868
		869	void
		870	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		871	PROTOTYPE: $;$
		872	PPCODE:
		873	{
		874	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		875	int fd = s_fileno_croak (fh, 0);
		876	dREQ;
		877
		878	if (close_pipe < 0)
		879	{
		880	int pipefd [2];
		881
		882	if (pipe (pipefd) < 0
		883	|| close (pipefd [1]) < 0
		884	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		885	abort (); /*D*/
		886
		887	close_pipe = pipefd [0];
		888	}
		889
		890	req->type = EIO_DUP2;
		891	req->int1 = close_pipe;
		892	req->sv2 = newSVsv (fh);
		893	req->int2 = fd;
		894
		895	REQ_SEND (req);
		896	}
		897
		898	void
1354	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	899	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1355	SV * fh
1356	UV offset
1357	UV length
1358	SV8 * data
1359	UV dataoffset
1360	SV * callback
1361	ALIAS:	900	ALIAS:
1362	aio_read = REQ_READ	901	aio_read = EIO_READ
1363	aio_write = REQ_WRITE	902	aio_write = EIO_WRITE
1364	PROTOTYPE: $$$$$;$	903	PROTOTYPE: $$$$$;$
1365	PPCODE:	904	PPCODE:
1366	{	905	{
1367	STRLEN svlen;	906	STRLEN svlen;
		907	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1368	char *svptr = SvPVbyte (data, svlen);	908	char *svptr = SvPVbyte (data, svlen);
1369		909	UV len = SvUV (length);
1370	SvUPGRADE (data, SVt_PV);
1371	SvPOK_on (data);
1372		910
1373	if (dataoffset < 0)	911	if (dataoffset < 0)
1374	dataoffset += svlen;	912	dataoffset += svlen;
1375		913
1376	if (dataoffset < 0 || dataoffset > svlen)	914	if (dataoffset < 0 || dataoffset > svlen)
1377	croak ("data offset outside of string");	915	croak ("dataoffset outside of data scalar");
1378		916
1379	if (ix == REQ_WRITE)	917	if (ix == EIO_WRITE)
1380	{	918	{
1381	/* write: check length and adjust. */	919	/* write: check length and adjust. */
1382	if (length < 0 || length + dataoffset > svlen)	920	if (!SvOK (length) || len + dataoffset > svlen)
1383	length = svlen - dataoffset;	921	len = svlen - dataoffset;
1384	}	922	}
1385	else	923	else
1386	{	924	{
1387	/* read: grow scalar as necessary */	925	/* read: check type and grow scalar as necessary */
		926	SvUPGRADE (data, SVt_PV);
1388	svptr = SvGROW (data, length + dataoffset);	927	svptr = SvGROW (data, len + dataoffset + 1);
1389	}	928	}
1390
1391	if (length < 0)
1392	croak ("length must not be negative");
1393		929
1394	{	930	{
1395	dREQ;	931	dREQ;
1396		932
1397	req->type = ix;	933	req->type = ix;
1398	req->fh = newSVsv (fh);	934	req->sv1 = newSVsv (fh);
1399	req->int1 = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	935	req->int1 = fd;
1400	: IoOFP (sv_2io (fh)));	936	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1401	req->offs = offset;
1402	req->size = length;	937	req->size = len;
1403	req->sv1 = SvREFCNT_inc (data);	938	req->sv2 = SvREFCNT_inc (data);
1404	req->ptr1 = (char *)svptr + dataoffset;	939	req->ptr2 = (char *)svptr + dataoffset;
1405	req->stroffset = dataoffset;	940	req->stroffset = dataoffset;
1406		941
1407	if (!SvREADONLY (data))	942	if (!SvREADONLY (data))
1408	{	943	{
1409	SvREADONLY_on (data);	944	SvREADONLY_on (data);
1410	req->flags |= FLAG_SV1_RO_OFF;	945	req->flags |= FLAG_SV2_RO_OFF;
1411	}	946	}
1412		947
1413	REQ_SEND;	948	REQ_SEND;
1414	}	949	}
1415	}	950	}
1416		951
1417	void	952	void
1418	aio_readlink (path,callback=&PL_sv_undef)	953	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1419	SV8 * path
1420	SV * callback
1421	PROTOTYPE: $$;$	954	PROTOTYPE: $$;$
1422	PPCODE:	955	PPCODE:
1423	{	956	{
1424	SV *data;	957	SV *data;
1425	dREQ;	958	dREQ;
1426		959
1427	data = newSV (NAME_MAX);
1428	SvPOK_on (data);
1429
1430	req->type = REQ_READLINK;	960	req->type = EIO_READLINK;
1431	req->fh = newSVsv (path);	961	req->sv1 = newSVsv (path);
1432	req->ptr2 = SvPVbyte_nolen (req->fh);	962	req->ptr1 = SvPVbyte_nolen (req->sv1);
1433	req->sv1 = data;
1434	req->ptr1 = SvPVbyte_nolen (data);
1435		963
1436	REQ_SEND;	964	REQ_SEND;
1437	}	965	}
1438		966
1439	void	967	void
1440	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	968	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1441	SV * out_fh
1442	SV * in_fh
1443	UV in_offset
1444	UV length
1445	SV * callback
1446	PROTOTYPE: $$$$;$	969	PROTOTYPE: $$$$;$
1447	PPCODE:	970	PPCODE:
1448	{	971	{
		972	int ifd = s_fileno_croak (in_fh , 0);
		973	int ofd = s_fileno_croak (out_fh, 1);
1449	dREQ;	974	dREQ;
1450		975
1451	req->type = REQ_SENDFILE;	976	req->type = EIO_SENDFILE;
1452	req->fh = newSVsv (out_fh);	977	req->sv1 = newSVsv (out_fh);
1453	req->int1 = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	978	req->int1 = ofd;
1454	req->sv2 = newSVsv (in_fh);	979	req->sv2 = newSVsv (in_fh);
1455	req->int2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	980	req->int2 = ifd;
1456	req->offs = in_offset;	981	req->offs = in_offset;
1457	req->size = length;	982	req->size = length;
1458		983
1459	REQ_SEND;	984	REQ_SEND;
1460	}	985	}
1461		986
1462	void	987	void
1463	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	988	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1464	SV * fh
1465	UV offset
1466	IV length
1467	SV * callback
1468	PROTOTYPE: $$$;$	989	PROTOTYPE: $$$;$
1469	PPCODE:	990	PPCODE:
1470	{	991	{
		992	int fd = s_fileno_croak (fh, 0);
1471	dREQ;	993	dREQ;
1472		994
1473	req->type = REQ_READAHEAD;	995	req->type = EIO_READAHEAD;
1474	req->fh = newSVsv (fh);	996	req->sv1 = newSVsv (fh);
1475	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh)));	997	req->int1 = fd;
1476	req->offs = offset;	998	req->offs = offset;
1477	req->size = length;	999	req->size = length;
1478		1000
1479	REQ_SEND;	1001	REQ_SEND;
1480	}	1002	}
1481		1003
1482	void	1004	void
1483	aio_stat (fh_or_path,callback=&PL_sv_undef)	1005	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1484	SV8 * fh_or_path
1485	SV * callback
1486	ALIAS:	1006	ALIAS:
1487	aio_stat = REQ_STAT	1007	aio_stat = EIO_STAT
1488	aio_lstat = REQ_LSTAT	1008	aio_lstat = EIO_LSTAT
		1009	aio_statvfs = EIO_STATVFS
1489	PPCODE:	1010	PPCODE:
1490	{	1011	{
1491	dREQ;	1012	dREQ;
1492		1013
1493	req->ptr2 = malloc (sizeof (Stat_t));	1014	req->sv1 = newSVsv (fh_or_path);
1494	if (!req->ptr2)
1495	{
1496	req_free (req);
1497	croak ("out of memory during aio_stat statdata allocation");
1498	}
1499		1015
1500	req->flags |= FLAG_PTR2_FREE;	1016	if (SvPOK (req->sv1))
1501
1502	if (SvPOK (fh_or_path))
1503	{	1017	{
1504	req->type = ix;	1018	req->type = ix;
1505	req->sv1 = newSVsv (fh_or_path);
1506	req->ptr1 = SvPVbyte_nolen (req->sv1);	1019	req->ptr1 = SvPVbyte_nolen (req->sv1);
1507	}	1020	}
1508	else	1021	else
1509	{	1022	{
1510	req->type = REQ_FSTAT;	1023	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1511	req->fh = newSVsv (fh_or_path);
1512	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1024	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1513	}	1025	}
1514		1026
1515	REQ_SEND;	1027	REQ_SEND;
1516	}	1028	}
1517		1029
1518	void	1030	void
		1031	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1032	PPCODE:
		1033	{
		1034	dREQ;
		1035
		1036	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1037	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1038	req->sv1 = newSVsv (fh_or_path);
		1039
		1040	if (SvPOK (req->sv1))
		1041	{
		1042	req->type = EIO_UTIME;
		1043	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1044	}
		1045	else
		1046	{
		1047	req->type = EIO_FUTIME;
		1048	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1049	}
		1050
		1051	REQ_SEND;
		1052	}
		1053
		1054	void
		1055	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1056	PPCODE:
		1057	{
		1058	dREQ;
		1059
		1060	req->sv1 = newSVsv (fh_or_path);
		1061	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1062
		1063	if (SvPOK (req->sv1))
		1064	{
		1065	req->type = EIO_TRUNCATE;
		1066	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1067	}
		1068	else
		1069	{
		1070	req->type = EIO_FTRUNCATE;
		1071	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1072	}
		1073
		1074	REQ_SEND;
		1075	}
		1076
		1077	void
		1078	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1079	ALIAS:
		1080	aio_chmod = EIO_CHMOD
		1081	aio_mkdir = EIO_MKDIR
		1082	PPCODE:
		1083	{
		1084	dREQ;
		1085
		1086	req->int2 = mode;
		1087	req->sv1 = newSVsv (fh_or_path);
		1088
		1089	if (SvPOK (req->sv1))
		1090	{
		1091	req->type = ix;
		1092	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1093	}
		1094	else
		1095	{
		1096	req->type = EIO_FCHMOD;
		1097	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1098	}
		1099
		1100	REQ_SEND;
		1101	}
		1102
		1103	void
		1104	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1105	PPCODE:
		1106	{
		1107	dREQ;
		1108
		1109	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1110	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1111	req->sv1 = newSVsv (fh_or_path);
		1112
		1113	if (SvPOK (req->sv1))
		1114	{
		1115	req->type = EIO_CHOWN;
		1116	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1117	}
		1118	else
		1119	{
		1120	req->type = EIO_FCHOWN;
		1121	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1122	}
		1123
		1124	REQ_SEND;
		1125	}
		1126
		1127	void
		1128	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1129	PPCODE:
		1130	{
		1131	dREQ;
		1132
		1133	req->type = EIO_READDIR;
		1134	req->sv1 = newSVsv (pathname);
		1135	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1136	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1137
		1138	if (flags & EIO_READDIR_DENTS)
		1139	req->int1 |= EIO_READDIR_CUSTOM2;
		1140
		1141	REQ_SEND;
		1142	}
		1143
		1144	void
1519	aio_unlink (pathname,callback=&PL_sv_undef)	1145	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1520	SV8 * pathname
1521	SV * callback
1522	ALIAS:	1146	ALIAS:
1523	aio_unlink = REQ_UNLINK	1147	aio_unlink = EIO_UNLINK
1524	aio_rmdir = REQ_RMDIR	1148	aio_rmdir = EIO_RMDIR
1525	aio_readdir = REQ_READDIR	1149	aio_readdir = EIO_READDIR
1526	PPCODE:	1150	PPCODE:
1527	{	1151	{
1528	dREQ;	1152	dREQ;
1529		1153
1530	req->type = ix;	1154	req->type = ix;
…		…
1533		1157
1534	REQ_SEND;	1158	REQ_SEND;
1535	}	1159	}
1536		1160
1537	void	1161	void
1538	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1162	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1539	SV8 * oldpath
1540	SV8 * newpath
1541	SV * callback
1542	ALIAS:	1163	ALIAS:
1543	aio_link = REQ_LINK	1164	aio_link = EIO_LINK
1544	aio_symlink = REQ_SYMLINK	1165	aio_symlink = EIO_SYMLINK
1545	aio_rename = REQ_RENAME	1166	aio_rename = EIO_RENAME
1546	PPCODE:	1167	PPCODE:
1547	{	1168	{
1548	dREQ;	1169	dREQ;
1549		1170
1550	req->type = ix;	1171	req->type = ix;
1551	req->fh = newSVsv (oldpath);	1172	req->sv1 = newSVsv (oldpath);
1552	req->ptr2 = SvPVbyte_nolen (req->fh);
1553	req->sv1 = newSVsv (newpath);
1554	req->ptr1 = SvPVbyte_nolen (req->sv1);	1173	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1174	req->sv2 = newSVsv (newpath);
		1175	req->ptr2 = SvPVbyte_nolen (req->sv2);
1555		1176
1556	REQ_SEND;	1177	REQ_SEND;
1557	}	1178	}
1558		1179
1559	void	1180	void
1560	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1181	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1561	SV8 * pathname
1562	SV * callback
1563	UV mode
1564	UV dev
1565	PPCODE:	1182	PPCODE:
1566	{	1183	{
1567	dREQ;	1184	dREQ;
1568		1185
1569	req->type = REQ_MKNOD;	1186	req->type = EIO_MKNOD;
1570	req->sv1 = newSVsv (pathname);	1187	req->sv1 = newSVsv (pathname);
1571	req->ptr1 = SvPVbyte_nolen (req->sv1);	1188	req->ptr1 = SvPVbyte_nolen (req->sv1);
1572	req->mode = (mode_t)mode;	1189	req->int2 = (mode_t)mode;
1573	req->offs = dev;	1190	req->offs = dev;
1574		1191
1575	REQ_SEND;	1192	REQ_SEND;
1576	}	1193	}
1577		1194
1578	void	1195	void
		1196	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1197	ALIAS:
		1198	aio_mtouch = EIO_MTOUCH
		1199	aio_msync = EIO_MSYNC
		1200	PROTOTYPE: $$$$;$
		1201	PPCODE:
		1202	{
		1203	STRLEN svlen;
		1204	UV len = SvUV (length);
		1205	char *svptr = SvPVbyte (data, svlen);
		1206
		1207	if (offset < 0)
		1208	offset += svlen;
		1209
		1210	if (offset < 0 || offset > svlen)
		1211	croak ("offset outside of scalar");
		1212
		1213	if (!SvOK (length) || len + offset > svlen)
		1214	len = svlen - offset;
		1215
		1216	{
		1217	dREQ;
		1218
		1219	req->type = ix;
		1220	req->size = len;
		1221	req->sv2 = SvREFCNT_inc (data);
		1222	req->ptr2 = (char *)svptr + offset;
		1223	req->int1 = flags;
		1224
		1225	REQ_SEND;
		1226	}
		1227	}
		1228
		1229	void
1579	aio_busy (delay,callback=&PL_sv_undef)	1230	aio_busy (double delay, SV *callback=&PL_sv_undef)
1580	double delay
1581	SV * callback
1582	PPCODE:	1231	PPCODE:
1583	{	1232	{
1584	dREQ;	1233	dREQ;
1585		1234
1586	req->type = REQ_BUSY;	1235	req->type = EIO_BUSY;
1587	req->int1 = delay < 0. ? 0 : delay;	1236	req->nv1 = delay < 0. ? 0. : delay;
1588	req->int2 = delay < 0. ? 0 : 1000. * (delay - req->int1);
1589		1237
1590	REQ_SEND;	1238	REQ_SEND;
1591	}	1239	}
1592		1240
1593	void	1241	void
1594	aio_group (callback=&PL_sv_undef)	1242	aio_group (SV *callback=&PL_sv_undef)
1595	SV * callback
1596	PROTOTYPE: ;$	1243	PROTOTYPE: ;$
1597	PPCODE:	1244	PPCODE:
1598	{	1245	{
1599	dREQ;	1246	dREQ;
1600		1247
1601	req->type = REQ_GROUP;	1248	req->type = EIO_GROUP;
1602		1249
1603	req_send (req);	1250	req_submit (req);
1604	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1251	XPUSHs (req_sv (req, aio_grp_stash));
1605	}	1252	}
1606		1253
1607	void	1254	void
1608	aio_nop (callback=&PL_sv_undef)	1255	aio_nop (SV *callback=&PL_sv_undef)
1609	SV * callback	1256	ALIAS:
		1257	aio_nop = EIO_NOP
		1258	aio_sync = EIO_SYNC
1610	PPCODE:	1259	PPCODE:
1611	{	1260	{
1612	dREQ;	1261	dREQ;
1613		1262
1614	req->type = REQ_NOP;	1263	req->type = ix;
1615		1264
1616	REQ_SEND;	1265	REQ_SEND;
1617	}	1266	}
1618		1267
1619	int	1268	int
1620	aioreq_pri (int pri = 0)	1269	aioreq_pri (int pri = 0)
1621	PROTOTYPE: ;$	1270	PROTOTYPE: ;$
1622	CODE:	1271	CODE:
1623	RETVAL = next_pri - PRI_BIAS;	1272	RETVAL = next_pri;
1624	if (items > 0)	1273	if (items > 0)
1625	{	1274	{
1626	if (pri < PRI_MIN) pri = PRI_MIN;	1275	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1627	if (pri > PRI_MAX) pri = PRI_MAX;	1276	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1628	next_pri = pri + PRI_BIAS;	1277	next_pri = pri;
1629	}	1278	}
1630	OUTPUT:	1279	OUTPUT:
1631	RETVAL	1280	RETVAL
1632		1281
1633	void	1282	void
1634	aioreq_nice (int nice = 0)	1283	aioreq_nice (int nice = 0)
1635	CODE:	1284	CODE:
1636	nice = next_pri - nice;	1285	nice = next_pri - nice;
1637	if (nice < PRI_MIN) nice = PRI_MIN;	1286	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1638	if (nice > PRI_MAX) nice = PRI_MAX;	1287	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1639	next_pri = nice + PRI_BIAS;	1288	next_pri = nice;
1640		1289
1641	void	1290	void
1642	flush ()	1291	flush ()
1643	PROTOTYPE:	1292	PROTOTYPE:
1644	CODE:	1293	CODE:
1645	while (nreqs)	1294	while (eio_nreqs ())
1646	{	1295	{
1647	poll_wait ();	1296	poll_wait ();
1648	poll_cb ();	1297	poll_cb ();
1649	}	1298	}
1650		1299
…		…
1659		1308
1660	int	1309	int
1661	poll_fileno()	1310	poll_fileno()
1662	PROTOTYPE:	1311	PROTOTYPE:
1663	CODE:	1312	CODE:
1664	RETVAL = respipe [0];	1313	RETVAL = s_epipe_fd (&respipe);
1665	OUTPUT:	1314	OUTPUT:
1666	RETVAL	1315	RETVAL
1667		1316
1668	int	1317	int
1669	poll_cb(...)	1318	poll_cb(...)
…		…
1681		1330
1682	int	1331	int
1683	nreqs()	1332	nreqs()
1684	PROTOTYPE:	1333	PROTOTYPE:
1685	CODE:	1334	CODE:
1686	RETVAL = nreqs;	1335	RETVAL = eio_nreqs ();
1687	OUTPUT:	1336	OUTPUT:
1688	RETVAL	1337	RETVAL
1689		1338
1690	int	1339	int
1691	nready()	1340	nready()
1692	PROTOTYPE:	1341	PROTOTYPE:
1693	CODE:	1342	CODE:
1694	RETVAL = get_nready ();	1343	RETVAL = eio_nready ();
1695	OUTPUT:	1344	OUTPUT:
1696	RETVAL	1345	RETVAL
1697		1346
1698	int	1347	int
1699	npending()	1348	npending()
1700	PROTOTYPE:	1349	PROTOTYPE:
1701	CODE:	1350	CODE:
1702	RETVAL = get_npending ();	1351	RETVAL = eio_npending ();
1703	OUTPUT:	1352	OUTPUT:
1704	RETVAL	1353	RETVAL
1705		1354
1706	int	1355	int
1707	nthreads()	1356	nthreads()
1708	PROTOTYPE:	1357	PROTOTYPE:
1709	CODE:	1358	CODE:
1710	if (WORDACCESS_UNSAFE) LOCK (wrklock);	1359	RETVAL = eio_nthreads ();
1711	RETVAL = started;
1712	if (WORDACCESS_UNSAFE) UNLOCK (wrklock);
1713	OUTPUT:	1360	OUTPUT:
1714	RETVAL	1361	RETVAL
1715		1362
		1363	int
		1364	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1365	PROTOTYPE: $$$$
		1366	CODE:
		1367	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1368	RETVAL = posix_fadvise (fh, offset, length, advice);
		1369	#else
		1370	RETVAL = errno = ENOSYS; /* yes, this is actually correct */
		1371	#endif
		1372	OUTPUT:
		1373	RETVAL
		1374
		1375	ssize_t
		1376	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1377	PROTOTYPE: $$$$
		1378	CODE:
		1379	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1380	OUTPUT:
		1381	RETVAL
		1382
		1383	void
		1384	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1385	PROTOTYPE: $$$$$;$
		1386	PPCODE:
		1387	sv_unmagic (scalar, MMAP_MAGIC);
		1388	{
		1389	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1390	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1391	if (addr == (void *)-1)
		1392	XSRETURN_NO;
		1393
		1394	sv_force_normal (scalar);
		1395
		1396	/* we store the length in mg_obj, as namlen is I32 :/ */
		1397	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1398	->mg_obj = (SV *)length;
		1399
		1400	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1401
		1402	if (!(prot & PROT_WRITE))
		1403	SvREADONLY_on (scalar);
		1404
		1405	if (SvLEN (scalar))
		1406	Safefree (SvPVX (scalar));
		1407
		1408	SvPVX (scalar) = (char *)addr;
		1409	SvCUR_set (scalar, length);
		1410	SvLEN_set (scalar, 0);
		1411	SvPOK_only (scalar);
		1412
		1413	XSRETURN_YES;
		1414	}
		1415
		1416	void
		1417	munmap (SV *scalar)
		1418	PROTOTYPE: $
		1419	CODE:
		1420	sv_unmagic (scalar, MMAP_MAGIC);
		1421
		1422	int
		1423	mlockall (int flags)
		1424	PROTOTYPE: $
		1425	CODE:
		1426	#if _POSIX_MEMLOCK
		1427	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1428	extern int mallopt (int, int);
		1429	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1430	#endif
		1431	mlockall (flags);
		1432	#else
		1433	RETVAL = -1;
		1434	errno = ENOSYS;
		1435	#endif
		1436	OUTPUT:
		1437	RETVAL
		1438
		1439	int
		1440	munlockall ()
		1441	PROTOTYPE:
		1442	CODE:
		1443	#if _POSIX_MEMLOCK
		1444	munlockall ();
		1445	#else
		1446	RETVAL = -1;
		1447	errno = ENOSYS;
		1448	#endif
		1449	OUTPUT:
		1450	RETVAL
		1451
		1452	void _on_next_submit (SV *cb)
		1453	CODE:
		1454	SvREFCNT_dec (on_next_submit);
		1455	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1456
1716	PROTOTYPES: DISABLE	1457	PROTOTYPES: DISABLE
1717		1458
1718	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1459	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1719		1460
1720	void	1461	void
1721	cancel (aio_req_ornot req)	1462	cancel (aio_req_ornot req)
1722	CODE:	1463	CODE:
1723	req_cancel (req);	1464	eio_cancel (req);
1724		1465
1725	void	1466	void
1726	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1467	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1727	CODE:	1468	PPCODE:
		1469	{
		1470	if (GIMME_V != G_VOID)
		1471	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1472
		1473	if (items > 1)
		1474	{
		1475	SV *cb_cv =get_cb (callback);
		1476
1728	SvREFCNT_dec (req->callback);	1477	SvREFCNT_dec (req->callback);
1729	req->callback = newSVsv (callback);	1478	req->callback = SvREFCNT_inc (cb_cv);
		1479	}
		1480	}
1730		1481
1731	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1482	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1732		1483
1733	void	1484	void
1734	add (aio_req grp, ...)	1485	add (aio_req grp, ...)
1735	PPCODE:	1486	PPCODE:
1736	{	1487	{
1737	int i;	1488	int i;
1738	aio_req req;
1739		1489
1740	if (grp->int1 == 2)	1490	if (grp->int1 == 2)
1741	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1491	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1742		1492
1743	for (i = 1; i < items; ++i )	1493	for (i = 1; i < items; ++i )
1744	{	1494	{
		1495	aio_req req;
		1496
1745	if (GIMME_V != G_VOID)	1497	if (GIMME_V != G_VOID)
1746	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1498	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1747		1499
1748	req = SvAIO_REQ (ST (i));	1500	req = SvAIO_REQ (ST (i));
1749		1501
1750	if (req)	1502	if (req)
1751	{	1503	eio_grp_add (grp, req);
1752	++grp->size;
1753	req->grp = grp;
1754
1755	req->grp_prev = 0;
1756	req->grp_next = grp->grp_first;
1757
1758	if (grp->grp_first)
1759	grp->grp_first->grp_prev = req;
1760
1761	grp->grp_first = req;
1762	}
1763	}	1504	}
1764	}	1505	}
1765		1506
1766	void	1507	void
1767	cancel_subs (aio_req_ornot req)	1508	cancel_subs (aio_req_ornot req)
…		…
1776	AV *av;	1517	AV *av;
1777		1518
1778	grp->errorno = errno;	1519	grp->errorno = errno;
1779		1520
1780	av = newAV ();	1521	av = newAV ();
		1522	av_extend (av, items - 1);
1781		1523
1782	for (i = 1; i < items; ++i )	1524	for (i = 1; i < items; ++i )
1783	av_push (av, newSVsv (ST (i)));	1525	av_push (av, newSVsv (ST (i)));
1784		1526
1785	SvREFCNT_dec (grp->sv1);	1527	SvREFCNT_dec (grp->sv1);
…		…
1792	grp->errorno = errorno;	1534	grp->errorno = errorno;
1793		1535
1794	void	1536	void
1795	limit (aio_req grp, int limit)	1537	limit (aio_req grp, int limit)
1796	CODE:	1538	CODE:
1797	grp->int2 = limit;	1539	eio_grp_limit (grp, limit);
1798	aio_grp_feed (grp);
1799		1540
1800	void	1541	void
1801	feed (aio_req grp, SV *callback=&PL_sv_undef)	1542	feed (aio_req grp, SV *callback=&PL_sv_undef)
1802	CODE:	1543	CODE:
1803	{	1544	{
1804	SvREFCNT_dec (grp->sv2);	1545	SvREFCNT_dec (grp->sv2);
1805	grp->sv2 = newSVsv (callback);	1546	grp->sv2 = newSVsv (callback);
		1547	grp->feed = aio_grp_feed;
1806		1548
1807	if (grp->int2 <= 0)	1549	if (grp->int2 <= 0)
1808	grp->int2 = 2;	1550	grp->int2 = 2;
1809		1551
1810	aio_grp_feed (grp);	1552	eio_grp_limit (grp, grp->int2);
1811	}	1553	}
1812		1554

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