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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.82 by root, Fri Oct 27 20:11:58 2006 UTC vs.
Revision 1.171 by root, Wed Aug 4 17:16:19 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	#if _XOPEN_SOURCE < 600 || NO_FADVISE
		146	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		147	#endif
		148
		149	#ifndef POSIX_MADV_NORMAL
		150	# define POSIX_MADV_NORMAL 0
		151	# define NO_MADVISE 1
		152	#endif
		153	#ifndef POSIX_MADV_SEQUENTIAL
		154	# define POSIX_MADV_SEQUENTIAL 0
		155	#endif
		156	#ifndef POSIX_MADV_RANDOM
		157	# define POSIX_MADV_RANDOM 0
		158	#endif
		159	#ifndef POSIX_MADV_WILLNEED
		160	# define POSIX_MADV_WILLNEED 0
		161	#endif
		162	#ifndef POSIX_MADV_DONTNEED
		163	# define POSIX_MADV_DONTNEED 0
		164	#endif
		165
		166	#if _XOPEN_SOURCE < 600 || NO_MADVISE
		167	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		168	#endif
		169
		170	#ifndef PROT_NONE
		171	# define PROT_NONE 0
		172	#endif
		173	#ifndef PROT_READ
		174	# define PROT_READ 0
		175	#endif
		176	#ifndef PROT_WRITE
		177	# define PROT_READ 0
		178	#endif
		179	#ifndef PROT_EXEC
		180	# define PROT_EXEC 0
		181	#endif
		182
		183	#ifndef ST_NODEV
		184	# define ST_NODEV 0
		185	#endif
		186	#ifndef ST_NOEXEC
		187	# define ST_NOEXEC 0
		188	#endif
		189	#ifndef ST_SYNCHRONOUS
		190	# define ST_SYNCHRONOUS 0
		191	#endif
		192	#ifndef ST_MANDLOCK
		193	# define ST_MANDLOCK 0
		194	#endif
		195	#ifndef ST_WRITE
		196	# define ST_WRITE 0
		197	#endif
		198	#ifndef ST_APPEND
		199	# define ST_APPEND 0
		200	#endif
		201	#ifndef ST_IMMUTABLE
		202	# define ST_IMMUTABLE 0
		203	#endif
		204	#ifndef ST_NOATIME
		205	# define ST_NOATIME 0
		206	#endif
		207	#ifndef ST_NODIRATIME
		208	# define ST_NODIRATIME 0
		209	#endif
		210	#ifndef ST_RELATIME
		211	# define ST_RELATIME 0
		212	#endif
		213
		214	#ifndef MCL_CURRENT
		215	# define MCL_CURRENT 0
		216	#endif
		217	#ifndef MCL_FUTURE
		218	# define MCL_FUTURE 0
		219	#endif
		220
		221	#ifndef MAP_ANONYMOUS
		222	# ifdef MAP_ANON
		223	# define MAP_ANONYMOUS MAP_ANON
43	# else	224	# else
44	# error sendfile support requested but not available	225	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	226	# endif
46	#endif	227	#endif
47		228	#ifndef MAP_HUGETLB
48	/* used for struct dirent, AIX doesn't provide it */	229	# define MAP_HUGETLB 0
49	#ifndef NAME_MAX
50	# define NAME_MAX 4096
51	#endif
52
53	#ifndef PTHREAD_STACK_MIN
54	/* care for broken platforms, e.g. windows */
55	# define PTHREAD_STACK_MIN 16384
56	#endif
57
58	#if __ia64
59	# define STACKSIZE 65536
60	#elif __i386 || __x86_64 /* 16k is unreasonably high :( */
61	# define STACKSIZE PTHREAD_STACK_MIN
62	#else
63	# define STACKSIZE 16384
64	#endif
65
66	/* wether word reads are potentially non-atomic.
67	* this is conservatice, likely most arches this runs
68	* on have atomic word read/writes.
69	*/
70	#ifndef WORDREAD_UNSAFE
71	# if __i386 || __x86_64
72	# define WORDREAD_UNSAFE 0
73	# else
74	# define WORDREAD_UNSAFE 1
75	# endif	230	#endif
		231	#ifndef MAP_LOCKED
		232	# define MAP_LOCKED 0
76	#endif	233	#endif
		234	#ifndef MAP_NORESERVE
		235	# define MAP_NORESERVE 0
		236	#endif
		237	#ifndef MAP_POPULATE
		238	# define MAP_POPULATE 0
		239	#endif
		240	#ifndef MAP_NONBLOCK
		241	# define MAP_NONBLOCK 0
		242	#endif
77		243
78	/* buffer size for various temporary buffers */	244	#ifndef PAGESIZE
79	#define AIO_BUFSIZE 65536	245	# define PAGESIZE sysconf (_SC_PAGESIZE)
		246	#endif
80		247
81	#define dBUF \	248	static int req_invoke (eio_req *req);
82	char *aio_buf; \	249	#define EIO_FINISH(req) req_invoke (req)
83	LOCK (wrklock); \	250	static void req_destroy (eio_req *grp);
84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	251	#define EIO_DESTROY(req) req_destroy (req)
85	UNLOCK (wrklock); \
86	if (!aio_buf) \
87	return -1;
88		252
89	enum {	253	enum {
90	REQ_QUIT,	254	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
91	REQ_OPEN, REQ_CLOSE,
92	REQ_READ, REQ_WRITE, REQ_READAHEAD,
93	REQ_SENDFILE,
94	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
95	REQ_FSYNC, REQ_FDATASYNC,
96	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
97	REQ_MKNOD, REQ_READDIR,
98	REQ_LINK, REQ_SYMLINK,
99	REQ_GROUP, REQ_NOP,
100	REQ_BUSY,
101	};	255	};
102		256
103	#define AIO_REQ_KLASS "IO::AIO::REQ"	257	#include "libeio/eio.c"
104	#define AIO_GRP_KLASS "IO::AIO::GRP"
105		258
106	typedef struct aio_cb
107	{
108	struct aio_cb *volatile next;
109
110	SV *data, *callback;
111	SV *fh, *fh2;
112	void *dataptr, *data2ptr;
113	Stat_t *statdata;
114	off_t offset;
115	size_t length;
116	ssize_t result;
117
118	STRLEN dataoffset;
119	int type;
120	int fd, fd2;
121	int errorno;
122	mode_t mode; /* open */
123
124	unsigned char flags;
125	unsigned char pri;
126
127	SV *self; /* the perl counterpart of this request, if any */
128	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
129	} aio_cb;
130
131	enum {
132	FLAG_CANCELLED = 0x01,
133	};
134
135	typedef aio_cb *aio_req;	259	typedef eio_req *aio_req;
136	typedef aio_cb *aio_req_ornot;	260	typedef eio_req *aio_req_ornot;
137		261
138	enum {	262	static SV *on_next_submit;
139	PRI_MIN = -4,	263	static int next_pri = EIO_PRI_DEFAULT;
140	PRI_MAX = 4,	264	static int max_outstanding;
141		265
142	DEFAULT_PRI = 0,	266	static s_epipe respipe;
143	PRI_BIAS = -PRI_MIN,
144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
145	};
146		267
147	static int next_pri = DEFAULT_PRI + PRI_BIAS;
148
149	static unsigned int started, wanted;
150
151	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)
152	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
153	#else
154	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
155	#endif
156
157	#define LOCK(mutex) pthread_mutex_lock (&(mutex))
158	#define UNLOCK(mutex) pthread_mutex_unlock (&(mutex))
159
160	/* worker threads management */
161	static pthread_mutex_t wrklock = AIO_MUTEX_INIT;
162
163	typedef struct worker {
164	/* locked by wrklock */
165	struct worker *prev, *next;
166
167	pthread_t tid;
168
169	/* locked by reslock, reqlock or wrklock */
170	aio_req req; /* currently processed request */
171	void *dbuf;
172	DIR *dirp;
173	} worker;
174
175	static worker wrk_first = { &wrk_first, &wrk_first, 0 };
176
177	static void worker_clear (worker *wrk)
178	{
179	if (wrk->dirp)
180	{
181	closedir (wrk->dirp);
182	wrk->dirp = 0;
183	}
184
185	if (wrk->dbuf)
186	{
187	free (wrk->dbuf);
188	wrk->dbuf = 0;
189	}
190	}
191
192	static void worker_free (worker *wrk)
193	{
194	wrk->next->prev = wrk->prev;
195	wrk->prev->next = wrk->next;
196
197	free (wrk);
198	}
199
200	static volatile unsigned int nreqs, nready, npending;
201	static volatile unsigned int max_outstanding = 0xffffffff;
202	static int respipe [2];
203
204	static pthread_mutex_t reslock = AIO_MUTEX_INIT;
205	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
206	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
207
208	#if WORDREAD_UNSAFE
209
210	static unsigned int get_nready ()
211	{
212	unsigned int retval;
213
214	LOCK (reqlock);
215	retval = nready;
216	UNLOCK (reqlock);
217
218	return retval;
219	}
220
221	static unsigned int get_npending ()
222	{
223	unsigned int retval;
224
225	LOCK (reslock);
226	retval = npending;
227	UNLOCK (reslock);
228
229	return retval;
230	}
231
232	#else
233
234	# define get_nready() nready
235	# define get_npending() npending
236
237	#endif
238
239	/*
240	* a somewhat faster data structure might be nice, but
241	* with 8 priorities this actually needs <20 insns
242	* per shift, the most expensive operation.
243	*/
244	typedef struct {
245	aio_req qs[NUM_PRI], qe[NUM_PRI]; /* qstart, qend */
246	int size;
247	} reqq;
248
249	static reqq req_queue;
250	static reqq res_queue;
251
252	int reqq_push (reqq *q, aio_req req)
253	{
254	int pri = req->pri;
255	req->next = 0;
256
257	if (q->qe[pri])
258	{
259	q->qe[pri]->next = req;
260	q->qe[pri] = req;
261	}
262	else
263	q->qe[pri] = q->qs[pri] = req;
264
265	return q->size++;
266	}
267
268	aio_req reqq_shift (reqq *q)
269	{
270	int pri;
271
272	if (!q->size)
273	return 0;
274
275	--q->size;
276
277	for (pri = NUM_PRI; pri--; )
278	{
279	aio_req req = q->qs[pri];
280
281	if (req)
282	{
283	if (!(q->qs[pri] = req->next))
284	q->qe[pri] = 0;
285
286	return req;
287	}
288	}
289
290	abort ();
291	}
292
293	static int poll_cb (int max);
294	static void req_invoke (aio_req req);
295	static void req_free (aio_req req);	268	static void req_destroy (aio_req req);
296	static void req_cancel (aio_req req);	269	static void req_cancel (aio_req req);
297		270
		271	static void want_poll (void)
		272	{
		273	/* write a dummy byte to the pipe so fh becomes ready */
		274	s_epipe_signal (&respipe);
		275	}
		276
		277	static void done_poll (void)
		278	{
		279	/* read any signals sent by the worker threads */
		280	s_epipe_drain (&respipe);
		281	}
		282
298	/* must be called at most once */	283	/* must be called at most once */
299	static SV *req_sv (aio_req req, const char *klass)	284	static SV *req_sv (aio_req req, HV *stash)
300	{	285	{
301	if (!req->self)	286	if (!req->self)
302	{	287	{
303	req->self = (SV *)newHV ();	288	req->self = (SV *)newHV ();
304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	289	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
305	}	290	}
306		291
307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	292	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
308	}	293	}
309		294
310	static aio_req SvAIO_REQ (SV *sv)	295	static aio_req SvAIO_REQ (SV *sv)
311	{	296	{
312	MAGIC *mg;	297	MAGIC *mg;
313		298
314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	299	if (!SvROK (sv)
		300	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		301	&& SvSTASH (SvRV (sv)) != aio_req_stash
		302	&& !sv_derived_from (sv, "IO::AIO::REQ")))
315	croak ("object of class " AIO_REQ_KLASS " expected");	303	croak ("object of class IO::AIO::REQ expected");
316		304
317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	305	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
318		306
319	return mg ? (aio_req)mg->mg_ptr : 0;	307	return mg ? (aio_req)mg->mg_ptr : 0;
320	}	308	}
321		309
322	static void aio_grp_feed (aio_req grp)	310	static void aio_grp_feed (aio_req grp)
323	{	311	{
324	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	312	if (grp->sv2 && SvOK (grp->sv2))
325	{	313	{
326	int old_len = grp->length;
327
328	if (grp->fh2 && SvOK (grp->fh2))
329	{
330	dSP;	314	dSP;
331		315
332	ENTER;	316	ENTER;
333	SAVETMPS;	317	SAVETMPS;
334	PUSHMARK (SP);	318	PUSHMARK (SP);
335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	319	XPUSHs (req_sv (grp, aio_grp_stash));
336	PUTBACK;	320	PUTBACK;
337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	321	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
338	SPAGAIN;	322	SPAGAIN;
339	FREETMPS;	323	FREETMPS;
340	LEAVE;	324	LEAVE;
341	}
342
343	/* stop if no progress has been made */
344	if (old_len == grp->length)
345	{
346	SvREFCNT_dec (grp->fh2);
347	grp->fh2 = 0;
348	break;
349	}
350	}	325	}
351	}	326	}
352		327
353	static void aio_grp_dec (aio_req grp)	328	static void req_submit (eio_req *req)
354	{	329	{
355	--grp->length;	330	eio_submit (req);
356		331
357	/* call feeder, if applicable */	332	if (expect_false (on_next_submit))
358	aio_grp_feed (grp);
359
360	/* finish, if done */
361	if (!grp->length && grp->fd)
362	{	333	{
363	req_invoke (grp);	334	dSP;
364	req_free (grp);	335	SV *cb = sv_2mortal (on_next_submit);
		336
		337	on_next_submit = 0;
		338
		339	PUSHMARK (SP);
		340	PUTBACK;
		341	call_sv (cb, G_DISCARD | G_EVAL);
365	}	342	}
366	}	343	}
367		344
368	static void req_invoke (aio_req req)	345	static int req_invoke (eio_req *req)
369	{	346	{
370	dSP;	347	if (req->flags & FLAG_SV2_RO_OFF)
		348	SvREADONLY_off (req->sv2);
371		349
372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	350	if (!EIO_CANCELLED (req) && req->callback)
373	{	351	{
		352	dSP;
		353	static SV *sv_result_cache; /* caches the result integer SV */
		354	SV *sv_result;
		355
374	ENTER;	356	ENTER;
375	SAVETMPS;	357	SAVETMPS;
376	PUSHMARK (SP);	358	PUSHMARK (SP);
377	EXTEND (SP, 1);	359	EXTEND (SP, 1);
378		360
		361	/* do not recreate the result IV from scratch each time */
		362	if (expect_true (sv_result_cache))
		363	{
		364	sv_result = sv_result_cache; sv_result_cache = 0;
		365	SvIV_set (sv_result, req->result);
		366	}
		367	else
		368	{
		369	sv_result = newSViv (req->result);
		370	SvREADONLY_on (sv_result);
		371	}
		372
379	switch (req->type)	373	switch (req->type)
380	{	374	{
381	case REQ_READDIR:	375	case EIO_READDIR:
382	{	376	{
383	SV *rv = &PL_sv_undef;	377	SV *rv = &PL_sv_undef;
384		378
385	if (req->result >= 0)	379	if (req->result >= 0)
386	{	380	{
387	int i;	381	int i;
388	char *buf = req->data2ptr;	382	char *names = (char *)req->ptr2;
		383	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
389	AV *av = newAV ();	384	AV *av = newAV ();
390		385
391	av_extend (av, req->result - 1);	386	av_extend (av, req->result - 1);
392		387
393	for (i = 0; i < req->result; ++i)	388	for (i = 0; i < req->result; ++i)
394	{	389	{
395	SV *sv = newSVpv (buf, 0);	390	if (req->int1 & EIO_READDIR_DENTS)
		391	{
		392	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
396		393
		394	if (req->int1 & EIO_READDIR_CUSTOM2)
		395	{
		396	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		397	AV *avent = newAV ();
		398
		399	av_extend (avent, 2);
		400
		401	if (!sv_type [ent->type])
		402	{
		403	sv_type [ent->type] = newSViv (ent->type);
		404	SvREADONLY_on (sv_type [ent->type]);
		405	}
		406
		407	av_store (avent, 0, namesv);
		408	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		409	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		410
		411	av_store (av, i, newRV_noinc ((SV *)avent));
		412	}
		413	else
397	av_store (av, i, sv);	414	av_store (av, i, namesv);
		415
		416	++ent;
		417	}
		418	else
		419	{
		420	SV *name = newSVpv (names, 0);
		421	av_store (av, i, name);
398	buf += SvCUR (sv) + 1;	422	names += SvCUR (name) + 1;
		423	}
399	}	424	}
400		425
401	rv = sv_2mortal (newRV_noinc ((SV *)av));	426	rv = sv_2mortal (newRV_noinc ((SV *)av));
402	}	427	}
403		428
404	PUSHs (rv);	429	PUSHs (rv);
		430
		431	if (req->int1 & EIO_READDIR_CUSTOM1)
		432	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
405	}	433	}
406	break;	434	break;
407		435
408	case REQ_OPEN:	436	case EIO_OPEN:
409	{	437	{
410	/* convert fd to fh */	438	/* convert fd to fh */
411	SV *fh;	439	SV *fh = &PL_sv_undef;
412		440
413	PUSHs (sv_2mortal (newSViv (req->result)));	441	if (req->result >= 0)
414	PUTBACK;	442	{
415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	443	GV *gv = (GV *)sv_newmortal ();
416	SPAGAIN;	444	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		445	char sym [64];
		446	int symlen;
		447
		448	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		449	gv_init (gv, aio_stash, sym, symlen, 0);
417		450
418	fh = SvREFCNT_inc (POPs);	451	symlen = snprintf (
		452	sym,
		453	sizeof (sym),
		454	"%s&=%d",
		455	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		456	(int)req->result
		457	);
419		458
		459	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		460	fh = (SV *)gv;
		461	}
		462
420	PUSHMARK (SP);	463	PUSHs (fh);
421	XPUSHs (sv_2mortal (fh));
422	}	464	}
423	break;	465	break;
424		466
		467	case EIO_STATVFS:
		468	case EIO_FSTATVFS:
		469	{
		470	SV *rv = &PL_sv_undef;
		471
		472	if (req->result >= 0)
		473	{
		474	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		475	HV *hv = newHV ();
		476
		477	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		478
		479	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		480	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		481	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		482	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		483	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		484	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		485	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		486	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		487	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		488	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		489	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		490	}
		491
		492	PUSHs (rv);
		493	}
		494
		495	break;
		496
425	case REQ_GROUP:	497	case EIO_GROUP:
426	req->fd = 2; /* mark group as finished */	498	req->int1 = 2; /* mark group as finished */
427		499
428	if (req->data)	500	if (req->sv1)
429	{	501	{
430	int i;	502	int i;
431	AV *av = (AV *)req->data;	503	AV *av = (AV *)req->sv1;
432		504
433	EXTEND (SP, AvFILL (av) + 1);	505	EXTEND (SP, AvFILL (av) + 1);
434	for (i = 0; i <= AvFILL (av); ++i)	506	for (i = 0; i <= AvFILL (av); ++i)
435	PUSHs (*av_fetch (av, i, 0));	507	PUSHs (*av_fetch (av, i, 0));
436	}	508	}
437	break;	509	break;
438		510
439	case REQ_NOP:	511	case EIO_NOP:
440	case REQ_BUSY:	512	case EIO_BUSY:
441	break;	513	break;
442		514
		515	case EIO_READLINK:
		516	if (req->result > 0)
		517	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		518	break;
		519
		520	case EIO_STAT:
		521	case EIO_LSTAT:
		522	case EIO_FSTAT:
		523	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		524	PL_laststatval = req->result;
		525	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		526	PUSHs (sv_result);
		527	break;
		528
		529	case EIO_READ:
		530	{
		531	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		532	*SvEND (req->sv2) = 0;
		533	SvPOK_only (req->sv2);
		534	SvSETMAGIC (req->sv2);
		535	PUSHs (sv_result);
		536	}
		537	break;
		538
		539	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		540	if (req->result > 0)
		541	SvIV_set (sv_result, 0);
		542	/* FALLTHROUGH */
		543
443	default:	544	default:
444	PUSHs (sv_2mortal (newSViv (req->result)));	545	PUSHs (sv_result);
445	break;	546	break;
446	}	547	}
447		548
448	errno = req->errorno;	549	errno = req->errorno;
449		550
450	PUTBACK;	551	PUTBACK;
451	call_sv (req->callback, G_VOID | G_EVAL);	552	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
452	SPAGAIN;	553	SPAGAIN;
		554
		555	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		556	SvREFCNT_dec (sv_result);
		557	else
		558	sv_result_cache = sv_result;
453		559
454	FREETMPS;	560	FREETMPS;
455	LEAVE;	561	LEAVE;
		562
		563	PUTBACK;
456	}	564	}
457		565
458	if (req->grp)	566	return !!SvTRUE (ERRSV);
459	{
460	aio_req grp = req->grp;
461
462	/* unlink request */
463	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
464	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
465
466	if (grp->grp_first == req)
467	grp->grp_first = req->grp_next;
468
469	aio_grp_dec (grp);
470	}
471
472	if (SvTRUE (ERRSV))
473	{
474	req_free (req);
475	croak (0);
476	}
477	}	567	}
478		568
479	static void req_free (aio_req req)	569	static void req_destroy (aio_req req)
480	{	570	{
481	if (req->self)	571	if (req->self)
482	{	572	{
483	sv_unmagic (req->self, PERL_MAGIC_ext);	573	sv_unmagic (req->self, PERL_MAGIC_ext);
484	SvREFCNT_dec (req->self);	574	SvREFCNT_dec (req->self);
485	}	575	}
486		576
487	SvREFCNT_dec (req->data);
488	SvREFCNT_dec (req->fh);	577	SvREFCNT_dec (req->sv1);
489	SvREFCNT_dec (req->fh2);	578	SvREFCNT_dec (req->sv2);
490	SvREFCNT_dec (req->callback);	579	SvREFCNT_dec (req->callback);
491	Safefree (req->statdata);
492
493	if (req->type == REQ_READDIR)
494	free (req->data2ptr);
495		580
496	Safefree (req);	581	Safefree (req);
497	}	582	}
498		583
499	static void req_cancel_subs (aio_req grp)	584	static void req_cancel_subs (aio_req grp)
500	{	585	{
501	aio_req sub;	586	aio_req sub;
502		587
503	if (grp->type != REQ_GROUP)	588	if (grp->type != EIO_GROUP)
504	return;	589	return;
505		590
506	SvREFCNT_dec (grp->fh2);	591	SvREFCNT_dec (grp->sv2);
507	grp->fh2 = 0;	592	grp->sv2 = 0;
508		593
509	for (sub = grp->grp_first; sub; sub = sub->grp_next)	594	eio_grp_cancel (grp);
510	req_cancel (sub);
511	}	595	}
512		596
513	static void req_cancel (aio_req req)	597	static void
		598	create_respipe (void)
514	{	599	{
515	req->flags |= FLAG_CANCELLED;	600	if (s_epipe_renew (&respipe))
516		601	croak ("IO::AIO: unable to initialize result pipe");
517	req_cancel_subs (req);
518	}	602	}
519		603
520	static void *aio_proc(void *arg);
521
522	static void start_thread (void)
523	{
524	sigset_t fullsigset, oldsigset;
525	pthread_attr_t attr;
526
527	worker *wrk = calloc (1, sizeof (worker));
528
529	if (!wrk)
530	croak ("unable to allocate worker thread data");
531
532	pthread_attr_init (&attr);
533	pthread_attr_setstacksize (&attr, STACKSIZE);
534	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
535	#ifdef PTHREAD_SCOPE_PROCESS
536	pthread_attr_setscope (&attr, PTHREAD_SCOPE_PROCESS);
537	#endif
538
539	sigfillset (&fullsigset);
540
541	LOCK (wrklock);
542	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
543
544	if (pthread_create (&wrk->tid, &attr, aio_proc, (void *)wrk) == 0)
545	{
546	wrk->prev = &wrk_first;
547	wrk->next = wrk_first.next;
548	wrk_first.next->prev = wrk;
549	wrk_first.next = wrk;
550	++started;
551	}
552	else
553	free (wrk);
554
555	sigprocmask (SIG_SETMASK, &oldsigset, 0);
556	UNLOCK (wrklock);
557	}
558
559	static void maybe_start_thread ()
560	{
561	#if 0
562	static struct timeval last;
563	struct timeval diff, now;
564	#endif
565
566	if (started >= wanted)
567	return;
568
569	if (nready <= nreqs - get_nready () - get_npending ())
570	return;
571
572	#if 0
573	gettimeofday (&now, 0);
574
575	diff.tv_sec = now.tv_sec - last.tv_sec;
576	diff.tv_usec = now.tv_usec - last.tv_usec;
577
578	if (diff.tv_usec < 0)
579	{
580	--diff.tv_sec;
581	diff.tv_usec += 1000000;
582	}
583
584	if (!diff.tv_sec && diff.tv_usec < 10000)
585	return;
586
587	last = now;
588	#endif
589
590	start_thread ();
591	}
592
593	static void req_send (aio_req req)
594	{
595	++nreqs;
596
597	LOCK (reqlock);
598	++nready;
599	reqq_push (&req_queue, req);
600	pthread_cond_signal (&reqwait);
601	UNLOCK (reqlock);
602
603	maybe_start_thread ();
604	}
605
606	static void end_thread (void)
607	{
608	aio_req req;
609
610	Newz (0, req, 1, aio_cb);
611
612	req->type = REQ_QUIT;
613	req->pri = PRI_MAX + PRI_BIAS;
614
615	req_send (req);
616
617	LOCK (wrklock);
618	--started;
619	UNLOCK (wrklock);
620	}
621
622	static void min_parallel (int nthreads)
623	{
624	if (wanted < nthreads)
625	wanted = nthreads;
626	}
627
628	static void max_parallel (int nthreads)
629	{
630	if (wanted > nthreads)
631	wanted = nthreads;
632
633	while (started > wanted)
634	end_thread ();
635	}
636
637	static void poll_wait ()	604	static void poll_wait (void)
638	{	605	{
639	fd_set rfd;
640
641	while (nreqs)	606	while (eio_nreqs ())
642	{	607	{
643	int size;	608	int size;
644	if (WORDREAD_UNSAFE) LOCK (reslock);	609
		610	X_LOCK (reslock);
645	size = res_queue.size;	611	size = res_queue.size;
646	if (WORDREAD_UNSAFE) UNLOCK (reslock);	612	X_UNLOCK (reslock);
647		613
648	if (size)	614	if (size)
649	return;	615	return;
650		616
651	maybe_start_thread ();	617	etp_maybe_start_thread ();
652		618
653	FD_ZERO(&rfd);	619	s_epipe_wait (&respipe);
654	FD_SET(respipe [0], &rfd);
655
656	select (respipe [0] + 1, &rfd, 0, 0, 0);
657	}	620	}
658	}	621	}
659		622
660	static int poll_cb (int max)	623	static int poll_cb (void)
661	{	624	{
662	dSP;
663	int count = 0;
664	int do_croak = 0;
665	aio_req req;
666
667	for (;;)	625	for (;;)
668	{	626	{
669	while (max <= 0 || count < max)	627	int res = eio_poll ();
670	{
671	maybe_start_thread ();
672		628
673	LOCK (reslock);	629	if (res > 0)
674	req = reqq_shift (&res_queue);
675
676	if (req)
677	{
678	--npending;
679
680	if (!res_queue.size)
681	{
682	/* read any signals sent by the worker threads */
683	char buf [32];
684	while (read (respipe [0], buf, 32) == 32)
685	;
686	}
687	}
688
689	UNLOCK (reslock);
690
691	if (!req)
692	break;
693
694	--nreqs;
695
696	if (req->type == REQ_GROUP && req->length)
697	{
698	req->fd = 1; /* mark request as delayed */
699	continue;
700	}
701	else
702	{
703	if (req->type == REQ_READ)
704	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
705
706	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
707	SvREADONLY_off (req->data);
708
709	if (req->statdata)
710	{
711	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
712	PL_laststatval = req->result;
713	PL_statcache = *(req->statdata);
714	}
715
716	req_invoke (req);
717
718	count++;
719	}
720
721	req_free (req);
722	}
723
724	if (nreqs <= max_outstanding)
725	break;	630	croak (0);
		631
		632	if (!max_outstanding || max_outstanding > eio_nreqs ())
		633	return res;
726		634
727	poll_wait ();	635	poll_wait ();
728
729	max = 0;
730	}	636	}
731
732	return count;
733	}	637	}
734		638
735	static void create_pipe ()	639	static void atfork_child (void)
736	{	640	{
737	if (pipe (respipe))	641	create_respipe ();
738	croak ("unable to initialize result pipe");
739
740	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
741	croak ("cannot set result pipe to nonblocking mode");
742
743	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
744	croak ("cannot set result pipe to nonblocking mode");
745	}	642	}
746		643
747	/*****************************************************************************/	644	/*****************************************************************************/
748	/* work around various missing functions */
749		645
750	#if !HAVE_PREADWRITE	646	#if !_POSIX_MAPPED_FILES
751	# define pread aio_pread	647	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
752	# define pwrite aio_pwrite	648	# define munmap(addr,length) (errno = ENOSYS, -1)
753		649	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
754	/*
755	* make our pread/pwrite safe against themselves, but not against
756	* normal read/write by using a mutex. slows down execution a lot,
757	* but that's your problem, not mine.
758	*/
759	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
760
761	static ssize_t pread (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 = read (fd, buf, count);
770	lseek (fd, ooffset, SEEK_SET);
771	UNLOCK (preadwritelock);
772
773	return res;
774	}
775
776	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
777	{
778	ssize_t res;
779	off_t ooffset;
780
781	LOCK (preadwritelock);
782	ooffset = lseek (fd, 0, SEEK_CUR);
783	lseek (fd, offset, SEEK_SET);
784	res = write (fd, buf, count);
785	lseek (fd, offset, SEEK_SET);
786	UNLOCK (preadwritelock);
787
788	return res;
789	}
790	#endif
791
792	#if !HAVE_FDATASYNC
793	# define fdatasync fsync
794	#endif
795
796	#if !HAVE_READAHEAD
797	# define readahead(fd,offset,count) aio_readahead (fd, offset, count, self)
798
799	static ssize_t aio_readahead (int fd, off_t offset, size_t count, worker *self)
800	{
801	dBUF;
802
803	while (count > 0)
804	{
805	size_t len = count < AIO_BUFSIZE ? count : AIO_BUFSIZE;
806
807	pread (fd, aio_buf, len, offset);
808	offset += len;
809	count -= len;
810	}
811
812	errno = 0;
813	}
814
815	#endif
816
817	#if !HAVE_READDIR_R
818	# define readdir_r aio_readdir_r
819
820	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
821
822	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
823	{
824	struct dirent *e;
825	int errorno;
826
827	LOCK (readdirlock);
828
829	e = readdir (dirp);
830	errorno = errno;
831
832	if (e)
833	{
834	*res = ent;
835	strcpy (ent->d_name, e->d_name);
836	}
837	else
838	*res = 0;
839
840	UNLOCK (readdirlock);
841
842	errno = errorno;
843	return e ? 0 : -1;
844	}
845	#endif
846
847	/* sendfile always needs emulation */
848	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count, worker *self)
849	{
850	ssize_t res;
851
852	if (!count)
853	return 0;
854
855	#if HAVE_SENDFILE
856	# if __linux
857	res = sendfile (ofd, ifd, &offset, count);
858
859	# elif __freebsd
860	/*
861	* Of course, the freebsd sendfile is a dire hack with no thoughts
862	* wasted on making it similar to other I/O functions.
863	*/
864	{
865	off_t sbytes;
866	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
867
868	if (res < 0 && sbytes)
869	/* maybe only on EAGAIN: as usual, the manpage leaves you guessing */
870	res = sbytes;
871	}
872
873	# elif __hpux
874	res = sendfile (ofd, ifd, offset, count, 0, 0);
875
876	# elif __solaris
877	{
878	struct sendfilevec vec;
879	size_t sbytes;
880
881	vec.sfv_fd = ifd;
882	vec.sfv_flag = 0;
883	vec.sfv_off = offset;
884	vec.sfv_len = count;
885
886	res = sendfilev (ofd, &vec, 1, &sbytes);
887
888	if (res < 0 && sbytes)
889	res = sbytes;
890	}
891
892	# endif	650	#endif
893	#else
894	res = -1;
895	errno = ENOSYS;
896	#endif
897		651
898	if (res < 0	652	#define MMAP_MAGIC PERL_MAGIC_ext
899	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
900	#if __solaris
901	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
902	#endif
903	)
904	)
905	{
906	/* emulate sendfile. this is a major pain in the ass */
907	dBUF;
908		653
909	res = 0;	654	static int
		655	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		656	{
		657	int old_errno = errno;
		658	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		659	errno = old_errno;
910		660
911	while (count)	661	mg->mg_obj = 0; /* just in case */
912	{
913	ssize_t cnt;
914
915	cnt = pread (ifd, aio_buf, count > AIO_BUFSIZE ? AIO_BUFSIZE : count, offset);
916		662
917	if (cnt <= 0)	663	SvREADONLY_off (sv);
918	{
919	if (cnt && !res) res = -1;
920	break;
921	}
922		664
923	cnt = write (ofd, aio_buf, cnt);	665	if (SvPVX (sv) != mg->mg_ptr)
		666	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
924		667
925	if (cnt <= 0)	668	SvCUR_set (sv, 0);
926	{	669	SvPVX (sv) = 0;
927	if (cnt && !res) res = -1;	670	SvOK_off (sv);
928	break;
929	}
930		671
931	offset += cnt;
932	res += cnt;
933	count -= cnt;
934	}
935	}
936
937	return res;	672	return 0;
938	}	673	}
939		674
940	/* read a full directory */	675	static MGVTBL mmap_vtbl = {
941	static void scandir_ (aio_req req, worker *self)	676	0, 0, 0, 0, mmap_free
942	{	677	};
943	DIR *dirp;
944	union
945	{
946	struct dirent d;
947	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
948	} *u;
949	struct dirent *entp;
950	char *name, *names;
951	int memlen = 4096;
952	int memofs = 0;
953	int res = 0;
954	int errorno;
955
956	LOCK (wrklock);
957	self->dirp = dirp = opendir (req->dataptr);
958	self->dbuf = u = malloc (sizeof (*u));
959	req->data2ptr = names = malloc (memlen);
960	UNLOCK (wrklock);
961
962	if (dirp && u && names)
963	for (;;)
964	{
965	errno = 0;
966	readdir_r (dirp, &u->d, &entp);
967
968	if (!entp)
969	break;
970
971	name = entp->d_name;
972
973	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
974	{
975	int len = strlen (name) + 1;
976
977	res++;
978
979	while (memofs + len > memlen)
980	{
981	memlen *= 2;
982	LOCK (wrklock);
983	req->data2ptr = names = realloc (names, memlen);
984	UNLOCK (wrklock);
985
986	if (!names)
987	break;
988	}
989
990	memcpy (names + memofs, name, len);
991	memofs += len;
992	}
993	}
994
995	if (errno)
996	res = -1;
997
998	req->result = res;
999	}
1000		678
1001	/*****************************************************************************/	679	/*****************************************************************************/
1002		680
1003	static void *aio_proc (void *thr_arg)	681	static SV *
		682	get_cb (SV *cb_sv)
1004	{	683	{
1005	aio_req req;	684	SvGETMAGIC (cb_sv);
1006	worker *self = (worker *)thr_arg;	685	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
1007
1008	for (;;)
1009	{
1010	LOCK (reqlock);
1011
1012	for (;;)
1013	{
1014	self->req = req = reqq_shift (&req_queue);
1015
1016	if (req)
1017	break;
1018
1019	pthread_cond_wait (&reqwait, &reqlock);
1020	}
1021
1022	--nready;
1023
1024	UNLOCK (reqlock);
1025
1026	errno = 0; /* strictly unnecessary */
1027
1028	if (!(req->flags & FLAG_CANCELLED))
1029	switch (req->type)
1030	{
1031	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
1032	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
1033
1034	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
1035	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length, self); break;
1036
1037	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
1038	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
1039	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
1040
1041	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
1042	case REQ_CLOSE: req->result = close (req->fd); break;
1043	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
1044	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
1045	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
1046	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
1047	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
1048	case REQ_MKNOD: req->result = mknod (req->data2ptr, req->mode, (dev_t)req->offset); break;
1049
1050	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
1051	case REQ_FSYNC: req->result = fsync (req->fd); break;
1052	case REQ_READDIR: scandir_ (req, self); break;
1053
1054	case REQ_BUSY:
1055	{
1056	struct timeval tv;
1057
1058	tv.tv_sec = req->fd;
1059	tv.tv_usec = req->fd2;
1060
1061	req->result = select (0, 0, 0, 0, &tv);
1062	}
1063
1064	case REQ_GROUP:
1065	case REQ_NOP:
1066	break;
1067
1068	case REQ_QUIT:
1069	LOCK (wrklock);
1070	worker_free (self);
1071	--started;
1072	UNLOCK (wrklock);
1073	return 0;
1074
1075	default:
1076	req->result = ENOSYS;
1077	break;
1078	}
1079
1080	req->errorno = errno;
1081
1082	LOCK (reslock);
1083
1084	++npending;
1085
1086	if (!reqq_push (&res_queue, req))
1087	/* write a dummy byte to the pipe so fh becomes ready */
1088	write (respipe [1], &respipe, 1);
1089
1090	self->req = 0;
1091	worker_clear (self);
1092
1093	UNLOCK (reslock);
1094	}
1095	}
1096
1097	/*****************************************************************************/
1098
1099	static void atfork_prepare (void)
1100	{
1101	LOCK (wrklock);
1102	LOCK (reqlock);
1103	LOCK (reslock);
1104	#if !HAVE_PREADWRITE
1105	LOCK (preadwritelock);
1106	#endif
1107	#if !HAVE_READDIR_R
1108	LOCK (readdirlock);
1109	#endif
1110	}
1111
1112	static void atfork_parent (void)
1113	{
1114	#if !HAVE_READDIR_R
1115	UNLOCK (readdirlock);
1116	#endif
1117	#if !HAVE_PREADWRITE
1118	UNLOCK (preadwritelock);
1119	#endif
1120	UNLOCK (reslock);
1121	UNLOCK (reqlock);
1122	UNLOCK (wrklock);
1123	}
1124
1125	static void atfork_child (void)
1126	{
1127	aio_req prv;
1128
1129	while (prv = reqq_shift (&req_queue))
1130	req_free (prv);
1131
1132	while (prv = reqq_shift (&res_queue))
1133	req_free (prv);
1134
1135	while (wrk_first.next != &wrk_first)
1136	{
1137	worker *wrk = wrk_first.next;
1138
1139	if (wrk->req)
1140	req_free (wrk->req);
1141
1142	worker_clear (wrk);
1143	worker_free (wrk);
1144	}
1145
1146	started = 0;
1147	nreqs = 0;
1148
1149	close (respipe [0]);
1150	close (respipe [1]);
1151	create_pipe ();
1152
1153	atfork_parent ();
1154	}	686	}
1155		687
1156	#define dREQ \	688	#define dREQ \
		689	SV *cb_cv; \
1157	aio_req req; \	690	aio_req req; \
1158	int req_pri = next_pri; \	691	int req_pri = next_pri; \
1159	next_pri = DEFAULT_PRI + PRI_BIAS; \	692	next_pri = EIO_PRI_DEFAULT; \
1160	\	693	\
1161	if (SvOK (callback) && !SvROK (callback)) \	694	cb_cv = get_cb (callback); \
1162	croak ("callback must be undef or of reference type"); \
1163	\	695	\
1164	Newz (0, req, 1, aio_cb); \	696	Newz (0, req, 1, eio_req); \
1165	if (!req) \	697	if (!req) \
1166	croak ("out of memory during aio_req allocation"); \	698	croak ("out of memory during eio_req allocation"); \
1167	\	699	\
1168	req->callback = newSVsv (callback); \	700	req->callback = SvREFCNT_inc (cb_cv); \
1169	req->pri = req_pri	701	req->pri = req_pri
1170		702
1171	#define REQ_SEND \	703	#define REQ_SEND \
		704	PUTBACK; \
1172	req_send (req); \	705	req_submit (req); \
		706	SPAGAIN; \
1173	\	707	\
1174	if (GIMME_V != G_VOID) \	708	if (GIMME_V != G_VOID) \
1175	XPUSHs (req_sv (req, AIO_REQ_KLASS));	709	XPUSHs (req_sv (req, aio_req_stash));
1176		710
1177	MODULE = IO::AIO PACKAGE = IO::AIO	711	MODULE = IO::AIO PACKAGE = IO::AIO
1178		712
1179	PROTOTYPES: ENABLE	713	PROTOTYPES: ENABLE
1180		714
1181	BOOT:	715	BOOT:
1182	{	716	{
		717	static const struct {
		718	const char *name;
		719	IV iv;
		720	} *civ, const_iv[] = {
		721	# define const_niv(name, value) { # name, (IV) value },
		722	# define const_iv(name) { # name, (IV) name },
		723	# define const_eio(name) { # name, (IV) EIO_ ## name },
		724	const_iv (EXDEV)
		725	const_iv (ENOSYS)
		726	const_iv (O_RDONLY)
		727	const_iv (O_WRONLY)
		728	const_iv (O_RDWR)
		729	const_iv (O_CREAT)
		730	const_iv (O_TRUNC)
		731	const_iv (O_EXCL)
		732	const_iv (O_APPEND)
		733	#ifndef _WIN32
		734	const_iv (S_IFIFO)
		735	#endif
		736	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		737	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		738	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		739	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		740	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		741	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		742
		743	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		744	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		745	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		746	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		747	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		748
		749	const_iv (ST_RDONLY)
		750	const_iv (ST_NOSUID)
		751	const_iv (ST_NODEV)
		752	const_iv (ST_NOEXEC)
		753	const_iv (ST_SYNCHRONOUS)
		754	const_iv (ST_MANDLOCK)
		755	const_iv (ST_WRITE)
		756	const_iv (ST_APPEND)
		757	const_iv (ST_IMMUTABLE)
		758	const_iv (ST_NOATIME)
		759	const_iv (ST_NODIRATIME)
		760	const_iv (ST_RELATIME)
		761
		762	const_iv (PROT_NONE)
		763	const_iv (PROT_EXEC)
		764	const_iv (PROT_READ)
		765	const_iv (PROT_WRITE)
		766
		767	/*const_iv (MAP_FIXED)*/
		768	const_iv (MAP_PRIVATE)
		769	const_iv (MAP_SHARED)
		770	const_iv (MAP_ANONYMOUS)
		771
		772	/* linuxish */
		773	const_iv (MAP_HUGETLB)
		774	const_iv (MAP_LOCKED)
		775	const_iv (MAP_NORESERVE)
		776	const_iv (MAP_POPULATE)
		777	const_iv (MAP_NONBLOCK)
		778
		779	const_iv (MCL_FUTURE)
		780	const_iv (MCL_CURRENT)
		781
		782	const_eio (MS_ASYNC)
		783	const_eio (MS_INVALIDATE)
		784	const_eio (MS_SYNC)
		785
		786	const_eio (MT_MODIFY)
		787
		788	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		789	const_eio (SYNC_FILE_RANGE_WRITE)
		790	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		791
		792	const_eio (READDIR_DENTS)
		793	const_eio (READDIR_DIRS_FIRST)
		794	const_eio (READDIR_STAT_ORDER)
		795	const_eio (READDIR_FOUND_UNKNOWN)
		796
		797	const_eio (DT_UNKNOWN)
		798	const_eio (DT_FIFO)
		799	const_eio (DT_CHR)
		800	const_eio (DT_DIR)
		801	const_eio (DT_BLK)
		802	const_eio (DT_REG)
		803	const_eio (DT_LNK)
		804	const_eio (DT_SOCK)
		805	const_eio (DT_WHT)
		806	};
		807
1183	HV *stash = gv_stashpv ("IO::AIO", 1);	808	aio_stash = gv_stashpv ("IO::AIO" , 1);
		809	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
		810	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1184		811
1185	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	812	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
1186	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	813	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
1187	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1188	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1189	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1190	newCONSTSUB (stash, "S_IFIFO", newSViv (S_IFIFO));
1191		814
		815	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		816
1192	create_pipe ();	817	create_respipe ();
1193	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1194		818
1195	start_thread ();	819	if (eio_init (want_poll, done_poll) < 0)
		820	croak ("IO::AIO: unable to initialise eio library");
		821
		822	/* atfork child called in fifo order, so before eio's handler */
		823	X_THREAD_ATFORK (0, 0, atfork_child);
1196	}	824	}
		825
		826	void
		827	max_poll_reqs (int nreqs)
		828	PROTOTYPE: $
		829	CODE:
		830	eio_set_max_poll_reqs (nreqs);
		831
		832	void
		833	max_poll_time (double nseconds)
		834	PROTOTYPE: $
		835	CODE:
		836	eio_set_max_poll_time (nseconds);
1197		837
1198	void	838	void
1199	min_parallel (int nthreads)	839	min_parallel (int nthreads)
1200	PROTOTYPE: $	840	PROTOTYPE: $
		841	CODE:
		842	eio_set_min_parallel (nthreads);
1201		843
1202	void	844	void
1203	max_parallel (int nthreads)	845	max_parallel (int nthreads)
1204	PROTOTYPE: $	846	PROTOTYPE: $
		847	CODE:
		848	eio_set_max_parallel (nthreads);
1205		849
1206	int	850	void
		851	max_idle (int nthreads)
		852	PROTOTYPE: $
		853	CODE:
		854	eio_set_max_idle (nthreads);
		855
		856	void
1207	max_outstanding (int maxreqs)	857	max_outstanding (int maxreqs)
1208	PROTOTYPE: $	858	PROTOTYPE: $
1209	CODE:	859	CODE:
1210	RETVAL = max_outstanding;
1211	max_outstanding = maxreqs;	860	max_outstanding = maxreqs;
1212	OUTPUT:
1213	RETVAL
1214		861
1215	void	862	void
1216	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	863	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1217	SV * pathname
1218	int flags
1219	int mode
1220	SV * callback
1221	PROTOTYPE: $$$;$	864	PROTOTYPE: $$$;$
1222	PPCODE:	865	PPCODE:
1223	{	866	{
1224	dREQ;	867	dREQ;
1225		868
1226	req->type = REQ_OPEN;	869	req->type = EIO_OPEN;
1227	req->data = newSVsv (pathname);	870	req->sv1 = newSVsv (pathname);
1228	req->dataptr = SvPVbyte_nolen (req->data);	871	req->ptr1 = SvPVbyte_nolen (req->sv1);
1229	req->fd = flags;	872	req->int1 = flags;
1230	req->mode = mode;	873	req->int2 = mode;
1231		874
1232	REQ_SEND;	875	REQ_SEND;
1233	}	876	}
1234		877
1235	void	878	void
1236	aio_close (fh,callback=&PL_sv_undef)	879	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1237	SV * fh
1238	SV * callback
1239	PROTOTYPE: $;$	880	PROTOTYPE: $;$
1240	ALIAS:	881	ALIAS:
1241	aio_close = REQ_CLOSE
1242	aio_fsync = REQ_FSYNC	882	aio_fsync = EIO_FSYNC
1243	aio_fdatasync = REQ_FDATASYNC	883	aio_fdatasync = EIO_FDATASYNC
1244	PPCODE:	884	PPCODE:
1245	{	885	{
		886	int fd = s_fileno_croak (fh, 0);
1246	dREQ;	887	dREQ;
1247		888
1248	req->type = ix;	889	req->type = ix;
1249	req->fh = newSVsv (fh);	890	req->sv1 = newSVsv (fh);
1250	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	891	req->int1 = fd;
1251		892
1252	REQ_SEND (req);	893	REQ_SEND (req);
1253	}	894	}
1254		895
1255	void	896	void
		897	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		898	PROTOTYPE: $$$$;$
		899	PPCODE:
		900	{
		901	int fd = s_fileno_croak (fh, 0);
		902	dREQ;
		903
		904	req->type = EIO_SYNC_FILE_RANGE;
		905	req->sv1 = newSVsv (fh);
		906	req->int1 = fd;
		907	req->offs = offset;
		908	req->size = nbytes;
		909	req->int2 = flags;
		910
		911	REQ_SEND (req);
		912	}
		913
		914	void
		915	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		916	PROTOTYPE: $;$
		917	PPCODE:
		918	{
		919	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		920	int fd = s_fileno_croak (fh, 0);
		921	dREQ;
		922
		923	if (close_pipe < 0)
		924	{
		925	int pipefd [2];
		926
		927	if (pipe (pipefd) < 0
		928	|| close (pipefd [1]) < 0
		929	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		930	abort (); /*D*/
		931
		932	close_pipe = pipefd [0];
		933	}
		934
		935	req->type = EIO_DUP2;
		936	req->int1 = close_pipe;
		937	req->sv2 = newSVsv (fh);
		938	req->int2 = fd;
		939
		940	REQ_SEND (req);
		941	}
		942
		943	void
1256	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	944	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1257	SV * fh
1258	UV offset
1259	UV length
1260	SV * data
1261	UV dataoffset
1262	SV * callback
1263	ALIAS:	945	ALIAS:
1264	aio_read = REQ_READ	946	aio_read = EIO_READ
1265	aio_write = REQ_WRITE	947	aio_write = EIO_WRITE
1266	PROTOTYPE: $$$$$;$	948	PROTOTYPE: $$$$$;$
1267	PPCODE:	949	PPCODE:
1268	{	950	{
1269	aio_req req;
1270	STRLEN svlen;	951	STRLEN svlen;
		952	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1271	char *svptr = SvPVbyte (data, svlen);	953	char *svptr = SvPVbyte (data, svlen);
1272		954	UV len = SvUV (length);
1273	SvUPGRADE (data, SVt_PV);
1274	SvPOK_on (data);
1275		955
1276	if (dataoffset < 0)	956	if (dataoffset < 0)
1277	dataoffset += svlen;	957	dataoffset += svlen;
1278		958
1279	if (dataoffset < 0 || dataoffset > svlen)	959	if (dataoffset < 0 || dataoffset > svlen)
1280	croak ("data offset outside of string");	960	croak ("dataoffset outside of data scalar");
1281		961
1282	if (ix == REQ_WRITE)	962	if (ix == EIO_WRITE)
1283	{	963	{
1284	/* write: check length and adjust. */	964	/* write: check length and adjust. */
1285	if (length < 0 || length + dataoffset > svlen)	965	if (!SvOK (length) || len + dataoffset > svlen)
1286	length = svlen - dataoffset;	966	len = svlen - dataoffset;
1287	}	967	}
1288	else	968	else
1289	{	969	{
1290	/* read: grow scalar as necessary */	970	/* read: check type and grow scalar as necessary */
		971	SvUPGRADE (data, SVt_PV);
1291	svptr = SvGROW (data, length + dataoffset);	972	svptr = SvGROW (data, len + dataoffset + 1);
1292	}	973	}
1293
1294	if (length < 0)
1295	croak ("length must not be negative");
1296		974
1297	{	975	{
1298	dREQ;	976	dREQ;
1299		977
1300	req->type = ix;	978	req->type = ix;
1301	req->fh = newSVsv (fh);	979	req->sv1 = newSVsv (fh);
1302	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	980	req->int1 = fd;
1303	: IoOFP (sv_2io (fh)));	981	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1304	req->offset = offset;	982	req->size = len;
1305	req->length = length;
1306	req->data = SvREFCNT_inc (data);	983	req->sv2 = SvREFCNT_inc (data);
1307	req->dataptr = (char *)svptr + dataoffset;	984	req->ptr2 = (char *)svptr + dataoffset;
		985	req->stroffset = dataoffset;
1308		986
1309	if (!SvREADONLY (data))	987	if (!SvREADONLY (data))
1310	{	988	{
1311	SvREADONLY_on (data);	989	SvREADONLY_on (data);
1312	req->data2ptr = (void *)data;	990	req->flags |= FLAG_SV2_RO_OFF;
1313	}	991	}
1314		992
1315	REQ_SEND;	993	REQ_SEND;
1316	}	994	}
1317	}	995	}
1318		996
1319	void	997	void
		998	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		999	PROTOTYPE: $$;$
		1000	PPCODE:
		1001	{
		1002	SV *data;
		1003	dREQ;
		1004
		1005	req->type = EIO_READLINK;
		1006	req->sv1 = newSVsv (path);
		1007	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1008
		1009	REQ_SEND;
		1010	}
		1011
		1012	void
1320	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	1013	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1321	SV * out_fh
1322	SV * in_fh
1323	UV in_offset
1324	UV length
1325	SV * callback
1326	PROTOTYPE: $$$$;$	1014	PROTOTYPE: $$$$;$
1327	PPCODE:	1015	PPCODE:
1328	{	1016	{
		1017	int ifd = s_fileno_croak (in_fh , 0);
		1018	int ofd = s_fileno_croak (out_fh, 1);
1329	dREQ;	1019	dREQ;
1330		1020
1331	req->type = REQ_SENDFILE;	1021	req->type = EIO_SENDFILE;
1332	req->fh = newSVsv (out_fh);	1022	req->sv1 = newSVsv (out_fh);
1333	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1023	req->int1 = ofd;
1334	req->fh2 = newSVsv (in_fh);	1024	req->sv2 = newSVsv (in_fh);
1335	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1025	req->int2 = ifd;
1336	req->offset = in_offset;	1026	req->offs = in_offset;
1337	req->length = length;	1027	req->size = length;
1338		1028
1339	REQ_SEND;	1029	REQ_SEND;
1340	}	1030	}
1341		1031
1342	void	1032	void
1343	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1033	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1344	SV * fh
1345	UV offset
1346	IV length
1347	SV * callback
1348	PROTOTYPE: $$$;$	1034	PROTOTYPE: $$$;$
1349	PPCODE:	1035	PPCODE:
1350	{	1036	{
		1037	int fd = s_fileno_croak (fh, 0);
1351	dREQ;	1038	dREQ;
1352		1039
1353	req->type = REQ_READAHEAD;	1040	req->type = EIO_READAHEAD;
1354	req->fh = newSVsv (fh);	1041	req->sv1 = newSVsv (fh);
1355	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1042	req->int1 = fd;
1356	req->offset = offset;	1043	req->offs = offset;
1357	req->length = length;	1044	req->size = length;
1358		1045
1359	REQ_SEND;	1046	REQ_SEND;
1360	}	1047	}
1361		1048
1362	void	1049	void
1363	aio_stat (fh_or_path,callback=&PL_sv_undef)	1050	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1364	SV * fh_or_path
1365	SV * callback
1366	ALIAS:	1051	ALIAS:
1367	aio_stat = REQ_STAT	1052	aio_stat = EIO_STAT
1368	aio_lstat = REQ_LSTAT	1053	aio_lstat = EIO_LSTAT
		1054	aio_statvfs = EIO_STATVFS
1369	PPCODE:	1055	PPCODE:
1370	{	1056	{
1371	dREQ;	1057	dREQ;
1372		1058
1373	New (0, req->statdata, 1, Stat_t);	1059	req->sv1 = newSVsv (fh_or_path);
1374	if (!req->statdata)
1375	{
1376	req_free (req);
1377	croak ("out of memory during aio_req->statdata allocation");
1378	}
1379		1060
1380	if (SvPOK (fh_or_path))	1061	if (SvPOK (req->sv1))
1381	{	1062	{
1382	req->type = ix;	1063	req->type = ix;
1383	req->data = newSVsv (fh_or_path);
1384	req->dataptr = SvPVbyte_nolen (req->data);	1064	req->ptr1 = SvPVbyte_nolen (req->sv1);
1385	}	1065	}
1386	else	1066	else
1387	{	1067	{
1388	req->type = REQ_FSTAT;	1068	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1389	req->fh = newSVsv (fh_or_path);
1390	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1069	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1391	}	1070	}
1392		1071
1393	REQ_SEND;	1072	REQ_SEND;
1394	}	1073	}
1395		1074
1396	void	1075	void
		1076	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1077	PPCODE:
		1078	{
		1079	dREQ;
		1080
		1081	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1082	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1083	req->sv1 = newSVsv (fh_or_path);
		1084
		1085	if (SvPOK (req->sv1))
		1086	{
		1087	req->type = EIO_UTIME;
		1088	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1089	}
		1090	else
		1091	{
		1092	req->type = EIO_FUTIME;
		1093	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1094	}
		1095
		1096	REQ_SEND;
		1097	}
		1098
		1099	void
		1100	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1101	PPCODE:
		1102	{
		1103	dREQ;
		1104
		1105	req->sv1 = newSVsv (fh_or_path);
		1106	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1107
		1108	if (SvPOK (req->sv1))
		1109	{
		1110	req->type = EIO_TRUNCATE;
		1111	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1112	}
		1113	else
		1114	{
		1115	req->type = EIO_FTRUNCATE;
		1116	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1117	}
		1118
		1119	REQ_SEND;
		1120	}
		1121
		1122	void
		1123	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1124	ALIAS:
		1125	aio_chmod = EIO_CHMOD
		1126	aio_mkdir = EIO_MKDIR
		1127	PPCODE:
		1128	{
		1129	dREQ;
		1130
		1131	req->int2 = mode;
		1132	req->sv1 = newSVsv (fh_or_path);
		1133
		1134	if (SvPOK (req->sv1))
		1135	{
		1136	req->type = ix;
		1137	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1138	}
		1139	else
		1140	{
		1141	req->type = EIO_FCHMOD;
		1142	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1143	}
		1144
		1145	REQ_SEND;
		1146	}
		1147
		1148	void
		1149	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1150	PPCODE:
		1151	{
		1152	dREQ;
		1153
		1154	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1155	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1156	req->sv1 = newSVsv (fh_or_path);
		1157
		1158	if (SvPOK (req->sv1))
		1159	{
		1160	req->type = EIO_CHOWN;
		1161	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1162	}
		1163	else
		1164	{
		1165	req->type = EIO_FCHOWN;
		1166	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1167	}
		1168
		1169	REQ_SEND;
		1170	}
		1171
		1172	void
		1173	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1174	PPCODE:
		1175	{
		1176	dREQ;
		1177
		1178	req->type = EIO_READDIR;
		1179	req->sv1 = newSVsv (pathname);
		1180	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1181	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1182
		1183	if (flags & EIO_READDIR_DENTS)
		1184	req->int1 |= EIO_READDIR_CUSTOM2;
		1185
		1186	REQ_SEND;
		1187	}
		1188
		1189	void
1397	aio_unlink (pathname,callback=&PL_sv_undef)	1190	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1398	SV * pathname
1399	SV * callback
1400	ALIAS:	1191	ALIAS:
1401	aio_unlink = REQ_UNLINK	1192	aio_unlink = EIO_UNLINK
1402	aio_rmdir = REQ_RMDIR	1193	aio_rmdir = EIO_RMDIR
1403	aio_readdir = REQ_READDIR	1194	aio_readdir = EIO_READDIR
1404	PPCODE:	1195	PPCODE:
1405	{	1196	{
1406	dREQ;	1197	dREQ;
1407		1198
1408	req->type = ix;	1199	req->type = ix;
1409	req->data = newSVsv (pathname);	1200	req->sv1 = newSVsv (pathname);
1410	req->dataptr = SvPVbyte_nolen (req->data);	1201	req->ptr1 = SvPVbyte_nolen (req->sv1);
1411		1202
1412	REQ_SEND;	1203	REQ_SEND;
1413	}	1204	}
1414		1205
1415	void	1206	void
1416	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1207	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1417	SV * oldpath
1418	SV * newpath
1419	SV * callback
1420	ALIAS:	1208	ALIAS:
1421	aio_link = REQ_LINK	1209	aio_link = EIO_LINK
1422	aio_symlink = REQ_SYMLINK	1210	aio_symlink = EIO_SYMLINK
1423	aio_rename = REQ_RENAME	1211	aio_rename = EIO_RENAME
1424	PPCODE:	1212	PPCODE:
1425	{	1213	{
1426	dREQ;	1214	dREQ;
1427		1215
1428	req->type = ix;	1216	req->type = ix;
1429	req->fh = newSVsv (oldpath);	1217	req->sv1 = newSVsv (oldpath);
1430	req->data2ptr = SvPVbyte_nolen (req->fh);	1218	req->ptr1 = SvPVbyte_nolen (req->sv1);
1431	req->data = newSVsv (newpath);	1219	req->sv2 = newSVsv (newpath);
1432	req->dataptr = SvPVbyte_nolen (req->data);	1220	req->ptr2 = SvPVbyte_nolen (req->sv2);
1433		1221
1434	REQ_SEND;	1222	REQ_SEND;
1435	}	1223	}
1436		1224
1437	void	1225	void
1438	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1226	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1439	SV * pathname
1440	SV * callback
1441	UV mode
1442	UV dev
1443	PPCODE:	1227	PPCODE:
1444	{	1228	{
1445	dREQ;	1229	dREQ;
1446		1230
1447	req->type = REQ_MKNOD;	1231	req->type = EIO_MKNOD;
1448	req->data = newSVsv (pathname);	1232	req->sv1 = newSVsv (pathname);
1449	req->dataptr = SvPVbyte_nolen (req->data);	1233	req->ptr1 = SvPVbyte_nolen (req->sv1);
1450	req->mode = (mode_t)mode;	1234	req->int2 = (mode_t)mode;
1451	req->offset = dev;	1235	req->offs = dev;
1452		1236
1453	REQ_SEND;	1237	REQ_SEND;
1454	}	1238	}
1455		1239
1456	void	1240	void
		1241	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1242	ALIAS:
		1243	aio_mtouch = EIO_MTOUCH
		1244	aio_msync = EIO_MSYNC
		1245	PROTOTYPE: $$$$;$
		1246	PPCODE:
		1247	{
		1248	STRLEN svlen;
		1249	UV len = SvUV (length);
		1250	char *svptr = SvPVbyte (data, svlen);
		1251
		1252	if (offset < 0)
		1253	offset += svlen;
		1254
		1255	if (offset < 0 || offset > svlen)
		1256	croak ("offset outside of scalar");
		1257
		1258	if (!SvOK (length) || len + offset > svlen)
		1259	len = svlen - offset;
		1260
		1261	{
		1262	dREQ;
		1263
		1264	req->type = ix;
		1265	req->size = len;
		1266	req->sv2 = SvREFCNT_inc (data);
		1267	req->ptr2 = (char *)svptr + offset;
		1268	req->int1 = flags;
		1269
		1270	REQ_SEND;
		1271	}
		1272	}
		1273
		1274	void
1457	aio_busy (delay,callback=&PL_sv_undef)	1275	aio_busy (double delay, SV *callback=&PL_sv_undef)
1458	double delay
1459	SV * callback
1460	PPCODE:	1276	PPCODE:
1461	{	1277	{
1462	dREQ;	1278	dREQ;
1463		1279
1464	req->type = REQ_BUSY;	1280	req->type = EIO_BUSY;
1465	req->fd = delay < 0. ? 0 : delay;	1281	req->nv1 = delay < 0. ? 0. : delay;
1466	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1467		1282
1468	REQ_SEND;	1283	REQ_SEND;
1469	}	1284	}
1470		1285
1471	void	1286	void
1472	aio_group (callback=&PL_sv_undef)	1287	aio_group (SV *callback=&PL_sv_undef)
1473	SV * callback
1474	PROTOTYPE: ;$	1288	PROTOTYPE: ;$
1475	PPCODE:	1289	PPCODE:
1476	{	1290	{
1477	dREQ;	1291	dREQ;
1478		1292
1479	req->type = REQ_GROUP;	1293	req->type = EIO_GROUP;
		1294
1480	req_send (req);	1295	req_submit (req);
1481
1482	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1296	XPUSHs (req_sv (req, aio_grp_stash));
1483	}	1297	}
1484		1298
1485	void	1299	void
1486	aio_nop (callback=&PL_sv_undef)	1300	aio_nop (SV *callback=&PL_sv_undef)
1487	SV * callback	1301	ALIAS:
		1302	aio_nop = EIO_NOP
		1303	aio_sync = EIO_SYNC
1488	PPCODE:	1304	PPCODE:
1489	{	1305	{
1490	dREQ;	1306	dREQ;
1491		1307
1492	req->type = REQ_NOP;	1308	req->type = ix;
1493		1309
1494	REQ_SEND;	1310	REQ_SEND;
1495	}	1311	}
1496		1312
1497	int	1313	int
1498	aioreq_pri (int pri = 0)	1314	aioreq_pri (int pri = 0)
1499	PROTOTYPE: ;$	1315	PROTOTYPE: ;$
1500	CODE:	1316	CODE:
1501	RETVAL = next_pri - PRI_BIAS;	1317	RETVAL = next_pri;
1502	if (items > 0)	1318	if (items > 0)
1503	{	1319	{
1504	if (pri < PRI_MIN) pri = PRI_MIN;	1320	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1505	if (pri > PRI_MAX) pri = PRI_MAX;	1321	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1506	next_pri = pri + PRI_BIAS;	1322	next_pri = pri;
1507	}	1323	}
1508	OUTPUT:	1324	OUTPUT:
1509	RETVAL	1325	RETVAL
1510		1326
1511	void	1327	void
1512	aioreq_nice (int nice = 0)	1328	aioreq_nice (int nice = 0)
1513	CODE:	1329	CODE:
1514	nice = next_pri - nice;	1330	nice = next_pri - nice;
1515	if (nice < PRI_MIN) nice = PRI_MIN;	1331	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1516	if (nice > PRI_MAX) nice = PRI_MAX;	1332	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1517	next_pri = nice + PRI_BIAS;	1333	next_pri = nice;
1518		1334
1519	void	1335	void
1520	flush ()	1336	flush ()
1521	PROTOTYPE:	1337	PROTOTYPE:
1522	CODE:	1338	CODE:
1523	while (nreqs)	1339	while (eio_nreqs ())
1524	{	1340	{
1525	poll_wait ();	1341	poll_wait ();
1526	poll_cb (0);	1342	poll_cb ();
1527	}	1343	}
1528		1344
1529	void	1345	int
1530	poll()	1346	poll()
1531	PROTOTYPE:	1347	PROTOTYPE:
1532	CODE:	1348	CODE:
1533	if (nreqs)
1534	{
1535	poll_wait ();	1349	poll_wait ();
1536	poll_cb (0);	1350	RETVAL = poll_cb ();
1537	}	1351	OUTPUT:
		1352	RETVAL
1538		1353
1539	int	1354	int
1540	poll_fileno()	1355	poll_fileno()
1541	PROTOTYPE:	1356	PROTOTYPE:
1542	CODE:	1357	CODE:
1543	RETVAL = respipe [0];	1358	RETVAL = s_epipe_fd (&respipe);
1544	OUTPUT:	1359	OUTPUT:
1545	RETVAL	1360	RETVAL
1546		1361
1547	int	1362	int
1548	poll_cb(...)	1363	poll_cb(...)
1549	PROTOTYPE:	1364	PROTOTYPE:
1550	CODE:	1365	CODE:
1551	RETVAL = poll_cb (0);	1366	RETVAL = poll_cb ();
1552	OUTPUT:
1553	RETVAL
1554
1555	int
1556	poll_some(int max = 0)
1557	PROTOTYPE: $
1558	CODE:
1559	RETVAL = poll_cb (max);
1560	OUTPUT:	1367	OUTPUT:
1561	RETVAL	1368	RETVAL
1562		1369
1563	void	1370	void
1564	poll_wait()	1371	poll_wait()
1565	PROTOTYPE:	1372	PROTOTYPE:
1566	CODE:	1373	CODE:
1567	if (nreqs)
1568	poll_wait ();	1374	poll_wait ();
1569		1375
1570	int	1376	int
1571	nreqs()	1377	nreqs()
1572	PROTOTYPE:	1378	PROTOTYPE:
1573	CODE:	1379	CODE:
1574	RETVAL = nreqs;	1380	RETVAL = eio_nreqs ();
1575	OUTPUT:	1381	OUTPUT:
1576	RETVAL	1382	RETVAL
1577		1383
1578	int	1384	int
1579	nready()	1385	nready()
1580	PROTOTYPE:	1386	PROTOTYPE:
1581	CODE:	1387	CODE:
1582	RETVAL = get_nready ();	1388	RETVAL = eio_nready ();
1583	OUTPUT:	1389	OUTPUT:
1584	RETVAL	1390	RETVAL
1585		1391
1586	int	1392	int
1587	npending()	1393	npending()
1588	PROTOTYPE:	1394	PROTOTYPE:
1589	CODE:	1395	CODE:
1590	RETVAL = get_npending ();	1396	RETVAL = eio_npending ();
1591	OUTPUT:	1397	OUTPUT:
1592	RETVAL	1398	RETVAL
1593		1399
		1400	int
		1401	nthreads()
		1402	PROTOTYPE:
		1403	CODE:
		1404	RETVAL = eio_nthreads ();
		1405	OUTPUT:
		1406	RETVAL
		1407
		1408	int
		1409	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1410	PROTOTYPE: $$$$
		1411	CODE:
		1412	RETVAL = posix_fadvise (fh, offset, length, advice);
		1413	OUTPUT:
		1414	RETVAL
		1415
		1416	ssize_t
		1417	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1418	PROTOTYPE: $$$$
		1419	CODE:
		1420	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1421	OUTPUT:
		1422	RETVAL
		1423
		1424	void
		1425	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1426	PROTOTYPE: $$$$$;$
		1427	PPCODE:
		1428	sv_unmagic (scalar, MMAP_MAGIC);
		1429	{
		1430	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1431	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1432	if (addr == (void *)-1)
		1433	XSRETURN_NO;
		1434
		1435	sv_force_normal (scalar);
		1436
		1437	/* we store the length in mg_obj, as namlen is I32 :/ */
		1438	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1439	->mg_obj = (SV *)length;
		1440
		1441	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1442
		1443	if (!(prot & PROT_WRITE))
		1444	SvREADONLY_on (scalar);
		1445
		1446	if (SvLEN (scalar))
		1447	Safefree (SvPVX (scalar));
		1448
		1449	SvPVX (scalar) = (char *)addr;
		1450	SvCUR_set (scalar, length);
		1451	SvLEN_set (scalar, 0);
		1452	SvPOK_only (scalar);
		1453
		1454	XSRETURN_YES;
		1455	}
		1456
		1457	void
		1458	munmap (SV *scalar)
		1459	PROTOTYPE: $
		1460	CODE:
		1461	sv_unmagic (scalar, MMAP_MAGIC);
		1462
		1463	int
		1464	madvise (SV *scalar, off_t offset, off_t length, IV advice_or_prot)
		1465	ALIAS:
		1466	mprotect = 1
		1467	PROTOTYPE: $$$$
		1468	CODE:
		1469	{
		1470	STRLEN cur;
		1471	char *addr = SvPVbyte (scalar, cur);
		1472
		1473	if (offset > cur)
		1474	RETVAL = errno = EFAULT;
		1475	else
		1476	{
		1477	if (!SvOK (ST (2)))
		1478	length = cur - offset;
		1479
		1480	if (offset + length > cur)
		1481	RETVAL = errno = EFAULT;
		1482	else
		1483	switch (ix)
		1484	{
		1485	case 0: RETVAL = posix_madvise (addr + offset, length, advice_or_prot); break;
		1486	case 1: RETVAL = mprotect (addr + offset, length, advice_or_prot); break;
		1487	}
		1488	}
		1489	}
		1490	OUTPUT:
		1491	RETVAL
		1492
		1493	int
		1494	mlockall (int flags)
		1495	PROTOTYPE: $
		1496	CODE:
		1497	#if _POSIX_MEMLOCK
		1498	#if __GLIBC__ == 2 && __GLIBC_MINOR__ <= 7
		1499	extern int mallopt (int, int);
		1500	mallopt (-6, 238); /* http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=473812 */
		1501	#endif
		1502	mlockall (flags);
		1503	#else
		1504	RETVAL = -1;
		1505	errno = ENOSYS;
		1506	#endif
		1507	OUTPUT:
		1508	RETVAL
		1509
		1510	int
		1511	munlockall ()
		1512	PROTOTYPE:
		1513	CODE:
		1514	#if _POSIX_MEMLOCK
		1515	munlockall ();
		1516	#else
		1517	RETVAL = -1;
		1518	errno = ENOSYS;
		1519	#endif
		1520	OUTPUT:
		1521	RETVAL
		1522
		1523	void _on_next_submit (SV *cb)
		1524	CODE:
		1525	SvREFCNT_dec (on_next_submit);
		1526	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1527
1594	PROTOTYPES: DISABLE	1528	PROTOTYPES: DISABLE
1595		1529
1596	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1530	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1597		1531
1598	void	1532	void
1599	cancel (aio_req_ornot req)	1533	cancel (aio_req_ornot req)
1600	CODE:	1534	CODE:
1601	req_cancel (req);	1535	eio_cancel (req);
1602		1536
1603	void	1537	void
1604	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1538	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1605	CODE:	1539	PPCODE:
		1540	{
		1541	if (GIMME_V != G_VOID)
		1542	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1543
		1544	if (items > 1)
		1545	{
		1546	SV *cb_cv =get_cb (callback);
		1547
1606	SvREFCNT_dec (req->callback);	1548	SvREFCNT_dec (req->callback);
1607	req->callback = newSVsv (callback);	1549	req->callback = SvREFCNT_inc (cb_cv);
		1550	}
		1551	}
1608		1552
1609	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1553	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1610		1554
1611	void	1555	void
1612	add (aio_req grp, ...)	1556	add (aio_req grp, ...)
1613	PPCODE:	1557	PPCODE:
1614	{	1558	{
1615	int i;	1559	int i;
1616	aio_req req;
1617		1560
1618	if (grp->fd == 2)	1561	if (grp->int1 == 2)
1619	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1562	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1620		1563
1621	for (i = 1; i < items; ++i )	1564	for (i = 1; i < items; ++i )
1622	{	1565	{
		1566	aio_req req;
		1567
1623	if (GIMME_V != G_VOID)	1568	if (GIMME_V != G_VOID)
1624	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1569	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1625		1570
1626	req = SvAIO_REQ (ST (i));	1571	req = SvAIO_REQ (ST (i));
1627		1572
1628	if (req)	1573	if (req)
1629	{	1574	eio_grp_add (grp, req);
1630	++grp->length;
1631	req->grp = grp;
1632
1633	req->grp_prev = 0;
1634	req->grp_next = grp->grp_first;
1635
1636	if (grp->grp_first)
1637	grp->grp_first->grp_prev = req;
1638
1639	grp->grp_first = req;
1640	}
1641	}	1575	}
1642	}	1576	}
1643		1577
1644	void	1578	void
1645	cancel_subs (aio_req_ornot req)	1579	cancel_subs (aio_req_ornot req)
…		…
1654	AV *av;	1588	AV *av;
1655		1589
1656	grp->errorno = errno;	1590	grp->errorno = errno;
1657		1591
1658	av = newAV ();	1592	av = newAV ();
		1593	av_extend (av, items - 1);
1659		1594
1660	for (i = 1; i < items; ++i )	1595	for (i = 1; i < items; ++i )
1661	av_push (av, newSVsv (ST (i)));	1596	av_push (av, newSVsv (ST (i)));
1662		1597
1663	SvREFCNT_dec (grp->data);	1598	SvREFCNT_dec (grp->sv1);
1664	grp->data = (SV *)av;	1599	grp->sv1 = (SV *)av;
1665	}	1600	}
1666		1601
1667	void	1602	void
1668	errno (aio_req grp, int errorno = errno)	1603	errno (aio_req grp, int errorno = errno)
1669	CODE:	1604	CODE:
1670	grp->errorno = errorno;	1605	grp->errorno = errorno;
1671		1606
1672	void	1607	void
1673	limit (aio_req grp, int limit)	1608	limit (aio_req grp, int limit)
1674	CODE:	1609	CODE:
1675	grp->fd2 = limit;	1610	eio_grp_limit (grp, limit);
1676	aio_grp_feed (grp);
1677		1611
1678	void	1612	void
1679	feed (aio_req grp, SV *callback=&PL_sv_undef)	1613	feed (aio_req grp, SV *callback=&PL_sv_undef)
1680	CODE:	1614	CODE:
1681	{	1615	{
1682	SvREFCNT_dec (grp->fh2);	1616	SvREFCNT_dec (grp->sv2);
1683	grp->fh2 = newSVsv (callback);	1617	grp->sv2 = newSVsv (callback);
		1618	grp->feed = aio_grp_feed;
1684		1619
1685	if (grp->fd2 <= 0)	1620	if (grp->int2 <= 0)
1686	grp->fd2 = 2;	1621	grp->int2 = 2;
1687		1622
1688	aio_grp_feed (grp);	1623	eio_grp_limit (grp, grp->int2);
1689	}	1624	}
1690		1625

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