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Comparing IO-AIO/AIO.xs (file contents):
Revision 1.81 by root, Fri Oct 27 20:10:06 2006 UTC vs.
Revision 1.175 by root, Wed Dec 1 04:43:12 2010 UTC

1	/* solaris */	1	#include "libeio/xthread.h"
2	#define _POSIX_PTHREAD_SEMANTICS 1
3
4	#if __linux && !defined(_GNU_SOURCE)
5	# define _GNU_SOURCE
6	#endif
7
8	/* just in case */
9	#define _REENTRANT 1
10		2
11	#include <errno.h>	3	#include <errno.h>
12		4
13	#include "EXTERN.h"	5	#include "EXTERN.h"
14	#include "perl.h"	6	#include "perl.h"
15	#include "XSUB.h"	7	#include "XSUB.h"
16		8
17	#include "autoconf/config.h"	9	#include "schmorp.h"
18
19	#include <pthread.h>
20		10
21	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
22	#include <errno.h>	13	#include <errno.h>
23	#include <sys/time.h>
24	#include <sys/select.h>
25	#include <sys/types.h>	14	#include <sys/types.h>
26	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
27	#include <limits.h>	17	#include <limits.h>
28	#include <unistd.h>
29	#include <fcntl.h>	18	#include <fcntl.h>
30	#include <signal.h>
31	#include <sched.h>	19	#include <sched.h>
32		20
33	#if HAVE_SENDFILE	21	#if _POSIX_MEMLOCK || _POSIX_MAPPED_FILES
34	# if __linux
35	# include <sys/sendfile.h>	22	# include <sys/mman.h>
36	# elif __freebsd	23	#endif
37	# include <sys/socket.h>	24
		25	/* 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	#endif
		128	#ifndef POSIX_FADV_SEQUENTIAL
		129	# define POSIX_FADV_SEQUENTIAL 0
		130	#endif
		131	#ifndef POSIX_FADV_RANDOM
		132	# define POSIX_FADV_RANDOM 0
		133	#endif
		134	#ifndef POSIX_FADV_NOREUSE
		135	# define POSIX_FADV_NOREUSE 0
		136	#endif
		137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140	#ifndef POSIX_FADV_DONTNEED
		141	# define POSIX_FADV_DONTNEED 0
		142	#endif
		143
		144	#if !HAVE_POSIX_FADVISE
		145	# define posix_fadvise(a,b,c,d) errno = ENOSYS /* also return ENOSYS */
		146	#endif
		147
		148	#ifndef POSIX_MADV_NORMAL
		149	# define POSIX_MADV_NORMAL 0
		150	#endif
		151	#ifndef POSIX_MADV_SEQUENTIAL
		152	# define POSIX_MADV_SEQUENTIAL 0
		153	#endif
		154	#ifndef POSIX_MADV_RANDOM
		155	# define POSIX_MADV_RANDOM 0
		156	#endif
		157	#ifndef POSIX_MADV_WILLNEED
		158	# define POSIX_MADV_WILLNEED 0
		159	#endif
		160	#ifndef POSIX_MADV_DONTNEED
		161	# define POSIX_MADV_DONTNEED 0
		162	#endif
		163
		164	#if !HAVE_POSIX_MADVISE
		165	# define posix_madvise(a,b,c) errno = ENOSYS /* also return ENOSYS */
		166	#endif
		167
		168	#ifndef PROT_NONE
		169	# define PROT_NONE 0
		170	#endif
		171	#ifndef PROT_READ
		172	# define PROT_READ 0
		173	#endif
		174	#ifndef PROT_WRITE
		175	# define PROT_READ 0
		176	#endif
		177	#ifndef PROT_EXEC
		178	# define PROT_EXEC 0
		179	#endif
		180
		181	#ifndef ST_NODEV
		182	# define ST_NODEV 0
		183	#endif
		184	#ifndef ST_NOEXEC
		185	# define ST_NOEXEC 0
		186	#endif
		187	#ifndef ST_SYNCHRONOUS
		188	# define ST_SYNCHRONOUS 0
		189	#endif
		190	#ifndef ST_MANDLOCK
		191	# define ST_MANDLOCK 0
		192	#endif
		193	#ifndef ST_WRITE
		194	# define ST_WRITE 0
		195	#endif
		196	#ifndef ST_APPEND
		197	# define ST_APPEND 0
		198	#endif
		199	#ifndef ST_IMMUTABLE
		200	# define ST_IMMUTABLE 0
		201	#endif
		202	#ifndef ST_NOATIME
		203	# define ST_NOATIME 0
		204	#endif
		205	#ifndef ST_NODIRATIME
		206	# define ST_NODIRATIME 0
		207	#endif
		208	#ifndef ST_RELATIME
		209	# define ST_RELATIME 0
		210	#endif
		211
		212	#ifndef MAP_ANONYMOUS
		213	# ifdef MAP_ANON
		214	# define MAP_ANONYMOUS MAP_ANON
43	# else	215	# else
44	# error sendfile support requested but not available	216	# define MAP_ANONYMOUS MAP_FIXED /* and hope this fails */
45	# endif	217	# endif
46	#endif	218	#endif
47		219	#ifndef MAP_HUGETLB
48	/* used for struct dirent, AIX doesn't provide it */	220	# 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	221	#endif
		222	#ifndef MAP_LOCKED
		223	# define MAP_LOCKED 0
76	#endif	224	#endif
		225	#ifndef MAP_NORESERVE
		226	# define MAP_NORESERVE 0
		227	#endif
		228	#ifndef MAP_POPULATE
		229	# define MAP_POPULATE 0
		230	#endif
		231	#ifndef MAP_NONBLOCK
		232	# define MAP_NONBLOCK 0
		233	#endif
77		234
78	/* buffer size for various temporary buffers */	235	#ifndef PAGESIZE
79	#define AIO_BUFSIZE 65536	236	# define PAGESIZE sysconf (_SC_PAGESIZE)
		237	#endif
80		238
81	#define dBUF \	239	static int req_invoke (eio_req *req);
82	char *aio_buf; \	240	#define EIO_FINISH(req) req_invoke (req)
83	LOCK (wrklock); \	241	static void req_destroy (eio_req *grp);
84	self->dbuf = aio_buf = malloc (AIO_BUFSIZE); \	242	#define EIO_DESTROY(req) req_destroy (req)
85	UNLOCK (wrklock); \
86	if (!aio_buf) \
87	return -1;
88		243
89	enum {	244	enum {
90	REQ_QUIT,	245	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	};	246	};
102		247
103	#define AIO_REQ_KLASS "IO::AIO::REQ"	248	#include "libeio/eio.c"
104	#define AIO_GRP_KLASS "IO::AIO::GRP"
105		249
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;	250	typedef eio_req *aio_req;
136	typedef aio_cb *aio_req_ornot;	251	typedef eio_req *aio_req_ornot;
137		252
138	enum {	253	static SV *on_next_submit;
139	PRI_MIN = -4,	254	static int next_pri = EIO_PRI_DEFAULT;
140	PRI_MAX = 4,	255	static int max_outstanding;
141		256
142	DEFAULT_PRI = 0,	257	static s_epipe respipe;
143	PRI_BIAS = -PRI_MIN,
144	NUM_PRI = PRI_MAX + PRI_BIAS + 1,
145	};
146		258
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);	259	static void req_destroy (aio_req req);
296	static void req_cancel (aio_req req);	260	static void req_cancel (aio_req req);
297		261
		262	static void want_poll (void)
		263	{
		264	/* write a dummy byte to the pipe so fh becomes ready */
		265	s_epipe_signal (&respipe);
		266	}
		267
		268	static void done_poll (void)
		269	{
		270	/* read any signals sent by the worker threads */
		271	s_epipe_drain (&respipe);
		272	}
		273
298	/* must be called at most once */	274	/* must be called at most once */
299	static SV *req_sv (aio_req req, const char *klass)	275	static SV *req_sv (aio_req req, HV *stash)
300	{	276	{
301	if (!req->self)	277	if (!req->self)
302	{	278	{
303	req->self = (SV *)newHV ();	279	req->self = (SV *)newHV ();
304	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	280	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
305	}	281	}
306		282
307	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	283	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
308	}	284	}
309		285
310	static aio_req SvAIO_REQ (SV *sv)	286	static aio_req SvAIO_REQ (SV *sv)
311	{	287	{
312	MAGIC *mg;	288	MAGIC *mg;
313		289
314	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	290	if (!SvROK (sv)
		291	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		292	&& SvSTASH (SvRV (sv)) != aio_req_stash
		293	&& !sv_derived_from (sv, "IO::AIO::REQ")))
315	croak ("object of class " AIO_REQ_KLASS " expected");	294	croak ("object of class IO::AIO::REQ expected");
316		295
317	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	296	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
318		297
319	return mg ? (aio_req)mg->mg_ptr : 0;	298	return mg ? (aio_req)mg->mg_ptr : 0;
320	}	299	}
321		300
322	static void aio_grp_feed (aio_req grp)	301	static void aio_grp_feed (aio_req grp)
323	{	302	{
324	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	303	if (grp->sv2 && SvOK (grp->sv2))
325	{	304	{
326	int old_len = grp->length;
327
328	if (grp->fh2 && SvOK (grp->fh2))
329	{
330	dSP;	305	dSP;
331		306
332	ENTER;	307	ENTER;
333	SAVETMPS;	308	SAVETMPS;
334	PUSHMARK (SP);	309	PUSHMARK (SP);
335	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	310	XPUSHs (req_sv (grp, aio_grp_stash));
336	PUTBACK;	311	PUTBACK;
337	call_sv (grp->fh2, G_VOID | G_EVAL | G_KEEPERR);	312	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
338	SPAGAIN;	313	SPAGAIN;
339	FREETMPS;	314	FREETMPS;
340	LEAVE;	315	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	}	316	}
351	}	317	}
352		318
353	static void aio_grp_dec (aio_req grp)	319	static void req_submit (eio_req *req)
354	{	320	{
355	--grp->length;	321	eio_submit (req);
356		322
357	/* call feeder, if applicable */	323	if (expect_false (on_next_submit))
358	aio_grp_feed (grp);
359
360	/* finish, if done */
361	if (!grp->length && grp->fd)
362	{	324	{
363	req_invoke (grp);	325	dSP;
364	req_free (grp);	326	SV *cb = sv_2mortal (on_next_submit);
		327
		328	on_next_submit = 0;
		329
		330	PUSHMARK (SP);
		331	PUTBACK;
		332	call_sv (cb, G_DISCARD | G_EVAL);
365	}	333	}
366	}	334	}
367		335
368	static void req_invoke (aio_req req)	336	static int req_invoke (eio_req *req)
369	{	337	{
370	dSP;	338	if (req->flags & FLAG_SV2_RO_OFF)
		339	SvREADONLY_off (req->sv2);
371		340
372	if (!(req->flags & FLAG_CANCELLED) && SvOK (req->callback))	341	if (!EIO_CANCELLED (req) && req->callback)
373	{	342	{
		343	dSP;
		344	static SV *sv_result_cache; /* caches the result integer SV */
		345	SV *sv_result;
		346
374	ENTER;	347	ENTER;
375	SAVETMPS;	348	SAVETMPS;
376	PUSHMARK (SP);	349	PUSHMARK (SP);
377	EXTEND (SP, 1);	350	EXTEND (SP, 1);
378		351
		352	/* do not recreate the result IV from scratch each time */
		353	if (expect_true (sv_result_cache))
		354	{
		355	sv_result = sv_result_cache; sv_result_cache = 0;
		356	SvIV_set (sv_result, req->result);
		357	}
		358	else
		359	{
		360	sv_result = newSViv (req->result);
		361	SvREADONLY_on (sv_result);
		362	}
		363
379	switch (req->type)	364	switch (req->type)
380	{	365	{
381	case REQ_READDIR:	366	case EIO_READDIR:
382	{	367	{
383	SV *rv = &PL_sv_undef;	368	SV *rv = &PL_sv_undef;
384		369
385	if (req->result >= 0)	370	if (req->result >= 0)
386	{	371	{
387	int i;	372	int i;
388	char *buf = req->data2ptr;	373	char *names = (char *)req->ptr2;
		374	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
389	AV *av = newAV ();	375	AV *av = newAV ();
390		376
391	av_extend (av, req->result - 1);	377	av_extend (av, req->result - 1);
392		378
393	for (i = 0; i < req->result; ++i)	379	for (i = 0; i < req->result; ++i)
394	{	380	{
395	SV *sv = newSVpv (buf, 0);	381	if (req->int1 & EIO_READDIR_DENTS)
		382	{
		383	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
396		384
		385	if (req->int1 & EIO_READDIR_CUSTOM2)
		386	{
		387	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		388	AV *avent = newAV ();
		389
		390	av_extend (avent, 2);
		391
		392	if (!sv_type [ent->type])
		393	{
		394	sv_type [ent->type] = newSViv (ent->type);
		395	SvREADONLY_on (sv_type [ent->type]);
		396	}
		397
		398	av_store (avent, 0, namesv);
		399	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		400	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		401
		402	av_store (av, i, newRV_noinc ((SV *)avent));
		403	}
		404	else
397	av_store (av, i, sv);	405	av_store (av, i, namesv);
		406
		407	++ent;
		408	}
		409	else
		410	{
		411	SV *name = newSVpv (names, 0);
		412	av_store (av, i, name);
398	buf += SvCUR (sv) + 1;	413	names += SvCUR (name) + 1;
		414	}
399	}	415	}
400		416
401	rv = sv_2mortal (newRV_noinc ((SV *)av));	417	rv = sv_2mortal (newRV_noinc ((SV *)av));
402	}	418	}
403		419
404	PUSHs (rv);	420	PUSHs (rv);
		421
		422	if (req->int1 & EIO_READDIR_CUSTOM1)
		423	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
405	}	424	}
406	break;	425	break;
407		426
408	case REQ_OPEN:	427	case EIO_OPEN:
409	{	428	{
410	/* convert fd to fh */	429	/* convert fd to fh */
411	SV *fh;	430	SV *fh = &PL_sv_undef;
412		431
413	PUSHs (sv_2mortal (newSViv (req->result)));	432	if (req->result >= 0)
414	PUTBACK;	433	{
415	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);	434	GV *gv = (GV *)sv_newmortal ();
416	SPAGAIN;	435	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		436	char sym [64];
		437	int symlen;
		438
		439	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		440	gv_init (gv, aio_stash, sym, symlen, 0);
417		441
418	fh = SvREFCNT_inc (POPs);	442	symlen = snprintf (
		443	sym,
		444	sizeof (sym),
		445	"%s&=%d",
		446	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		447	(int)req->result
		448	);
419		449
		450	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		451	fh = (SV *)gv;
		452	}
		453
420	PUSHMARK (SP);	454	PUSHs (fh);
421	XPUSHs (sv_2mortal (fh));
422	}	455	}
423	break;	456	break;
424		457
		458	case EIO_STATVFS:
		459	case EIO_FSTATVFS:
		460	{
		461	SV *rv = &PL_sv_undef;
		462
		463	if (req->result >= 0)
		464	{
		465	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		466	HV *hv = newHV ();
		467
		468	rv = sv_2mortal (newRV_noinc ((SV *)hv));
		469
		470	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		471	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		472	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		473	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		474	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		475	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		476	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		477	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		478	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		479	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		480	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		481	}
		482
		483	PUSHs (rv);
		484	}
		485
		486	break;
		487
425	case REQ_GROUP:	488	case EIO_GROUP:
426	req->fd = 2; /* mark group as finished */	489	req->int1 = 2; /* mark group as finished */
427		490
428	if (req->data)	491	if (req->sv1)
429	{	492	{
430	int i;	493	int i;
431	AV *av = (AV *)req->data;	494	AV *av = (AV *)req->sv1;
432		495
433	EXTEND (SP, AvFILL (av) + 1);	496	EXTEND (SP, AvFILL (av) + 1);
434	for (i = 0; i <= AvFILL (av); ++i)	497	for (i = 0; i <= AvFILL (av); ++i)
435	PUSHs (*av_fetch (av, i, 0));	498	PUSHs (*av_fetch (av, i, 0));
436	}	499	}
437	break;	500	break;
438		501
439	case REQ_NOP:	502	case EIO_NOP:
440	case REQ_BUSY:	503	case EIO_BUSY:
441	break;	504	break;
442		505
		506	case EIO_READLINK:
		507	if (req->result > 0)
		508	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		509	break;
		510
		511	case EIO_STAT:
		512	case EIO_LSTAT:
		513	case EIO_FSTAT:
		514	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		515	PL_laststatval = req->result;
		516	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		517	PUSHs (sv_result);
		518	break;
		519
		520	case EIO_READ:
		521	{
		522	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		523	*SvEND (req->sv2) = 0;
		524	SvPOK_only (req->sv2);
		525	SvSETMAGIC (req->sv2);
		526	PUSHs (sv_result);
		527	}
		528	break;
		529
		530	case EIO_DUP2: /* EIO_DUP2 actually means aio_close(), su fudge result value */
		531	if (req->result > 0)
		532	SvIV_set (sv_result, 0);
		533	/* FALLTHROUGH */
		534
443	default:	535	default:
444	PUSHs (sv_2mortal (newSViv (req->result)));	536	PUSHs (sv_result);
445	break;	537	break;
446	}	538	}
447		539
448	errno = req->errorno;	540	errno = req->errorno;
449		541
450	PUTBACK;	542	PUTBACK;
451	call_sv (req->callback, G_VOID | G_EVAL);	543	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
452	SPAGAIN;	544	SPAGAIN;
		545
		546	if (expect_false (SvREFCNT (sv_result) != 1 || sv_result_cache))
		547	SvREFCNT_dec (sv_result);
		548	else
		549	sv_result_cache = sv_result;
453		550
454	FREETMPS;	551	FREETMPS;
455	LEAVE;	552	LEAVE;
		553
		554	PUTBACK;
456	}	555	}
457		556
458	if (req->grp)	557	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	}	558	}
478		559
479	static void req_free (aio_req req)	560	static void req_destroy (aio_req req)
480	{	561	{
481	if (req->self)	562	if (req->self)
482	{	563	{
483	sv_unmagic (req->self, PERL_MAGIC_ext);	564	sv_unmagic (req->self, PERL_MAGIC_ext);
484	SvREFCNT_dec (req->self);	565	SvREFCNT_dec (req->self);
485	}	566	}
486		567
487	SvREFCNT_dec (req->data);
488	SvREFCNT_dec (req->fh);	568	SvREFCNT_dec (req->sv1);
489	SvREFCNT_dec (req->fh2);	569	SvREFCNT_dec (req->sv2);
490	SvREFCNT_dec (req->callback);	570	SvREFCNT_dec (req->callback);
491	Safefree (req->statdata);
492
493	if (req->type == REQ_READDIR)
494	free (req->data2ptr);
495		571
496	Safefree (req);	572	Safefree (req);
497	}	573	}
498		574
499	static void req_cancel_subs (aio_req grp)	575	static void req_cancel_subs (aio_req grp)
500	{	576	{
501	aio_req sub;	577	aio_req sub;
502		578
503	if (grp->type != REQ_GROUP)	579	if (grp->type != EIO_GROUP)
504	return;	580	return;
505		581
506	SvREFCNT_dec (grp->fh2);	582	SvREFCNT_dec (grp->sv2);
507	grp->fh2 = 0;	583	grp->sv2 = 0;
508		584
509	for (sub = grp->grp_first; sub; sub = sub->grp_next)	585	eio_grp_cancel (grp);
510	req_cancel (sub);
511	}	586	}
512		587
513	static void req_cancel (aio_req req)	588	static void
		589	create_respipe (void)
514	{	590	{
515	req->flags |= FLAG_CANCELLED;	591	if (s_epipe_renew (&respipe))
516		592	croak ("IO::AIO: unable to initialize result pipe");
517	req_cancel_subs (req);
518	}	593	}
519		594
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 ()	595	static void poll_wait (void)
638	{	596	{
639	fd_set rfd;
640
641	while (nreqs)	597	while (eio_nreqs ())
642	{	598	{
643	int size;	599	int size;
644	if (WORDREAD_UNSAFE) LOCK (reslock);	600
		601	X_LOCK (reslock);
645	size = res_queue.size;	602	size = res_queue.size;
646	if (WORDREAD_UNSAFE) UNLOCK (reslock);	603	X_UNLOCK (reslock);
647		604
648	if (size)	605	if (size)
649	return;	606	return;
650		607
651	maybe_start_thread ();	608	etp_maybe_start_thread ();
652		609
653	FD_ZERO(&rfd);	610	s_epipe_wait (&respipe);
654	FD_SET(respipe [0], &rfd);
655
656	select (respipe [0] + 1, &rfd, 0, 0, 0);
657	}	611	}
658	}	612	}
659		613
660	static int poll_cb (int max)	614	static int poll_cb (void)
661	{	615	{
662	dSP;
663	int count = 0;
664	int do_croak = 0;
665	aio_req req;
666
667	for (;;)	616	for (;;)
668	{	617	{
669	while (max <= 0 || count < max)	618	int res = eio_poll ();
670	{
671	maybe_start_thread ();
672		619
673	LOCK (reslock);	620	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;	621	croak (0);
		622
		623	if (!max_outstanding || max_outstanding > eio_nreqs ())
		624	return res;
726		625
727	poll_wait ();	626	poll_wait ();
728
729	max = 0;
730	}	627	}
731
732	return count;
733	}	628	}
734		629
735	static void create_pipe ()	630	static void atfork_child (void)
736	{	631	{
737	if (pipe (respipe))	632	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	}	633	}
746		634
747	/*****************************************************************************/	635	/*****************************************************************************/
748	/* work around various missing functions */
749		636
750	#if !HAVE_PREADWRITE	637	#if !_POSIX_MAPPED_FILES
751	# define pread aio_pread	638	# define mmap(addr,length,prot,flags,fd,offs) (errno = ENOSYS, -1)
752	# define pwrite aio_pwrite	639	# define munmap(addr,length) (errno = ENOSYS, -1)
753		640	# define mprotect(addr,len,prot) (errno = ENOSYS, -1)
754	/*	641	# define PROT_NONE 0
755	* make our pread/pwrite safe against themselves, but not against	642	# define PROT_WRITE 0
756	* normal read/write by using a mutex. slows down execution a lot,	643	# define MAP_PRIVATE 0
757	* but that's your problem, not mine.	644	# define MAP_SHARED 0
758	*/	645	# define MAP_FIXED 0
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	646	#endif
893	#else
894	res = -1;
895	errno = ENOSYS;
896	#endif
897		647
898	if (res < 0	648	#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		649
909	res = 0;	650	static int
		651	mmap_free (pTHX_ SV *sv, MAGIC *mg)
		652	{
		653	int old_errno = errno;
		654	munmap (mg->mg_ptr, (size_t)mg->mg_obj);
		655	errno = old_errno;
910		656
911	while (count)	657	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		658
917	if (cnt <= 0)	659	SvREADONLY_off (sv);
918	{
919	if (cnt && !res) res = -1;
920	break;
921	}
922		660
923	cnt = write (ofd, aio_buf, cnt);	661	if (SvPVX (sv) != mg->mg_ptr)
		662	croak ("ERROR: IO::AIO::mmap-mapped scalar changed location, detected");
924		663
925	if (cnt <= 0)	664	SvCUR_set (sv, 0);
926	{	665	SvPVX (sv) = 0;
927	if (cnt && !res) res = -1;	666	SvOK_off (sv);
928	break;
929	}
930		667
931	offset += cnt;
932	res += cnt;
933	count -= cnt;
934	}
935	}
936
937	return res;	668	return 0;
938	}	669	}
939		670
940	/* read a full directory */	671	static MGVTBL mmap_vtbl = {
941	static void scandir_ (aio_req req, worker *self)	672	0, 0, 0, 0, mmap_free
942	{	673	};
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		674
1001	/*****************************************************************************/	675	/*****************************************************************************/
1002		676
1003	static void *aio_proc (void *thr_arg)	677	static SV *
		678	get_cb (SV *cb_sv)
1004	{	679	{
1005	aio_req req;	680	SvGETMAGIC (cb_sv);
1006	worker *self = (worker *)thr_arg;	681	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	}	682	}
1155		683
1156	#define dREQ \	684	#define dREQ \
		685	SV *cb_cv; \
1157	aio_req req; \	686	aio_req req; \
1158	int req_pri = next_pri; \	687	int req_pri = next_pri; \
1159	next_pri = DEFAULT_PRI + PRI_BIAS; \	688	next_pri = EIO_PRI_DEFAULT; \
1160	\	689	\
1161	if (SvOK (callback) && !SvROK (callback)) \	690	cb_cv = get_cb (callback); \
1162	croak ("callback must be undef or of reference type"); \
1163	\	691	\
1164	Newz (0, req, 1, aio_cb); \	692	Newz (0, req, 1, eio_req); \
1165	if (!req) \	693	if (!req) \
1166	croak ("out of memory during aio_req allocation"); \	694	croak ("out of memory during eio_req allocation"); \
1167	\	695	\
1168	req->callback = newSVsv (callback); \	696	req->callback = SvREFCNT_inc (cb_cv); \
1169	req->pri = req_pri	697	req->pri = req_pri
1170		698
1171	#define REQ_SEND \	699	#define REQ_SEND \
		700	PUTBACK; \
1172	req_send (req); \	701	req_submit (req); \
		702	SPAGAIN; \
1173	\	703	\
1174	if (GIMME_V != G_VOID) \	704	if (GIMME_V != G_VOID) \
1175	XPUSHs (req_sv (req, AIO_REQ_KLASS));	705	XPUSHs (req_sv (req, aio_req_stash));
1176		706
1177	MODULE = IO::AIO PACKAGE = IO::AIO	707	MODULE = IO::AIO PACKAGE = IO::AIO
1178		708
1179	PROTOTYPES: ENABLE	709	PROTOTYPES: ENABLE
1180		710
1181	BOOT:	711	BOOT:
1182	{	712	{
		713	static const struct {
		714	const char *name;
		715	IV iv;
		716	} *civ, const_iv[] = {
		717	# define const_niv(name, value) { # name, (IV) value },
		718	# define const_iv(name) { # name, (IV) name },
		719	# define const_eio(name) { # name, (IV) EIO_ ## name },
		720	const_iv (EXDEV)
		721	const_iv (ENOSYS)
		722	const_iv (O_RDONLY)
		723	const_iv (O_WRONLY)
		724	const_iv (O_RDWR)
		725	const_iv (O_CREAT)
		726	const_iv (O_TRUNC)
		727	const_iv (O_EXCL)
		728	const_iv (O_APPEND)
		729	#ifndef _WIN32
		730	const_iv (S_IFIFO)
		731	#endif
		732	const_niv (FADV_NORMAL , POSIX_FADV_NORMAL)
		733	const_niv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		734	const_niv (FADV_RANDOM , POSIX_FADV_RANDOM)
		735	const_niv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		736	const_niv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		737	const_niv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		738
		739	const_niv (MADV_NORMAL , POSIX_MADV_NORMAL)
		740	const_niv (MADV_SEQUENTIAL, POSIX_MADV_SEQUENTIAL)
		741	const_niv (MADV_RANDOM , POSIX_MADV_RANDOM)
		742	const_niv (MADV_WILLNEED , POSIX_MADV_WILLNEED)
		743	const_niv (MADV_DONTNEED , POSIX_MADV_DONTNEED)
		744
		745	const_iv (ST_RDONLY)
		746	const_iv (ST_NOSUID)
		747	const_iv (ST_NODEV)
		748	const_iv (ST_NOEXEC)
		749	const_iv (ST_SYNCHRONOUS)
		750	const_iv (ST_MANDLOCK)
		751	const_iv (ST_WRITE)
		752	const_iv (ST_APPEND)
		753	const_iv (ST_IMMUTABLE)
		754	const_iv (ST_NOATIME)
		755	const_iv (ST_NODIRATIME)
		756	const_iv (ST_RELATIME)
		757
		758	const_iv (PROT_NONE)
		759	const_iv (PROT_EXEC)
		760	const_iv (PROT_READ)
		761	const_iv (PROT_WRITE)
		762
		763	/*const_iv (MAP_FIXED)*/
		764	const_iv (MAP_PRIVATE)
		765	const_iv (MAP_SHARED)
		766	const_iv (MAP_ANONYMOUS)
		767
		768	/* linuxish */
		769	const_iv (MAP_HUGETLB)
		770	const_iv (MAP_LOCKED)
		771	const_iv (MAP_NORESERVE)
		772	const_iv (MAP_POPULATE)
		773	const_iv (MAP_NONBLOCK)
		774
		775	const_eio (MCL_FUTURE)
		776	const_eio (MCL_CURRENT)
		777
		778	const_eio (MS_ASYNC)
		779	const_eio (MS_INVALIDATE)
		780	const_eio (MS_SYNC)
		781
		782	const_eio (MT_MODIFY)
		783
		784	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		785	const_eio (SYNC_FILE_RANGE_WRITE)
		786	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		787
		788	const_eio (READDIR_DENTS)
		789	const_eio (READDIR_DIRS_FIRST)
		790	const_eio (READDIR_STAT_ORDER)
		791	const_eio (READDIR_FOUND_UNKNOWN)
		792
		793	const_eio (DT_UNKNOWN)
		794	const_eio (DT_FIFO)
		795	const_eio (DT_CHR)
		796	const_eio (DT_DIR)
		797	const_eio (DT_BLK)
		798	const_eio (DT_REG)
		799	const_eio (DT_LNK)
		800	const_eio (DT_SOCK)
		801	const_eio (DT_WHT)
		802	};
		803
1183	HV *stash = gv_stashpv ("IO::AIO", 1);	804	aio_stash = gv_stashpv ("IO::AIO" , 1);
1184	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	805	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
1185	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	806	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
1186	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
1187	newCONSTSUB (stash, "O_CREAT", newSViv (O_CREAT));
1188	newCONSTSUB (stash, "O_TRUNC", newSViv (O_TRUNC));
1189		807
		808	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		809	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		810
		811	newCONSTSUB (aio_stash, "PAGESIZE", newSViv (PAGESIZE));
		812
1190	create_pipe ();	813	create_respipe ();
1191	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
1192		814
1193	start_thread ();	815	if (eio_init (want_poll, done_poll) < 0)
		816	croak ("IO::AIO: unable to initialise eio library");
		817
		818	/* atfork child called in fifo order, so before eio's handler */
		819	X_THREAD_ATFORK (0, 0, atfork_child);
1194	}	820	}
		821
		822	void
		823	max_poll_reqs (int nreqs)
		824	PROTOTYPE: $
		825	CODE:
		826	eio_set_max_poll_reqs (nreqs);
		827
		828	void
		829	max_poll_time (double nseconds)
		830	PROTOTYPE: $
		831	CODE:
		832	eio_set_max_poll_time (nseconds);
1195		833
1196	void	834	void
1197	min_parallel (int nthreads)	835	min_parallel (int nthreads)
1198	PROTOTYPE: $	836	PROTOTYPE: $
		837	CODE:
		838	eio_set_min_parallel (nthreads);
1199		839
1200	void	840	void
1201	max_parallel (int nthreads)	841	max_parallel (int nthreads)
1202	PROTOTYPE: $	842	PROTOTYPE: $
		843	CODE:
		844	eio_set_max_parallel (nthreads);
1203		845
1204	int	846	void
		847	max_idle (int nthreads)
		848	PROTOTYPE: $
		849	CODE:
		850	eio_set_max_idle (nthreads);
		851
		852	void
1205	max_outstanding (int maxreqs)	853	max_outstanding (int maxreqs)
1206	PROTOTYPE: $	854	PROTOTYPE: $
1207	CODE:	855	CODE:
1208	RETVAL = max_outstanding;
1209	max_outstanding = maxreqs;	856	max_outstanding = maxreqs;
1210	OUTPUT:
1211	RETVAL
1212		857
1213	void	858	void
1214	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	859	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1215	SV * pathname
1216	int flags
1217	int mode
1218	SV * callback
1219	PROTOTYPE: $$$;$
1220	PPCODE:	860	PPCODE:
1221	{	861	{
1222	dREQ;	862	dREQ;
1223		863
1224	req->type = REQ_OPEN;	864	req->type = EIO_OPEN;
1225	req->data = newSVsv (pathname);	865	req->sv1 = newSVsv (pathname);
1226	req->dataptr = SvPVbyte_nolen (req->data);	866	req->ptr1 = SvPVbyte_nolen (req->sv1);
1227	req->fd = flags;	867	req->int1 = flags;
1228	req->mode = mode;	868	req->int2 = mode;
1229		869
1230	REQ_SEND;	870	REQ_SEND;
1231	}	871	}
1232		872
1233	void	873	void
1234	aio_close (fh,callback=&PL_sv_undef)	874	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1235	SV * fh
1236	SV * callback
1237	PROTOTYPE: $;$
1238	ALIAS:	875	ALIAS:
1239	aio_close = REQ_CLOSE
1240	aio_fsync = REQ_FSYNC	876	aio_fsync = EIO_FSYNC
1241	aio_fdatasync = REQ_FDATASYNC	877	aio_fdatasync = EIO_FDATASYNC
1242	PPCODE:	878	PPCODE:
1243	{	879	{
		880	int fd = s_fileno_croak (fh, 0);
1244	dREQ;	881	dREQ;
1245		882
1246	req->type = ix;	883	req->type = ix;
1247	req->fh = newSVsv (fh);	884	req->sv1 = newSVsv (fh);
1248	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	885	req->int1 = fd;
1249		886
1250	REQ_SEND (req);	887	REQ_SEND (req);
1251	}	888	}
1252		889
1253	void	890	void
		891	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		892	PPCODE:
		893	{
		894	int fd = s_fileno_croak (fh, 0);
		895	dREQ;
		896
		897	req->type = EIO_SYNC_FILE_RANGE;
		898	req->sv1 = newSVsv (fh);
		899	req->int1 = fd;
		900	req->offs = offset;
		901	req->size = nbytes;
		902	req->int2 = flags;
		903
		904	REQ_SEND (req);
		905	}
		906
		907	void
		908	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		909	PPCODE:
		910	{
		911	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		912	int fd = s_fileno_croak (fh, 0);
		913	dREQ;
		914
		915	if (close_pipe < 0)
		916	{
		917	int pipefd [2];
		918
		919	if (pipe (pipefd) < 0
		920	|| close (pipefd [1]) < 0
		921	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		922	abort (); /*D*/
		923
		924	close_pipe = pipefd [0];
		925	}
		926
		927	req->type = EIO_DUP2;
		928	req->int1 = close_pipe;
		929	req->sv2 = newSVsv (fh);
		930	req->int2 = fd;
		931
		932	REQ_SEND (req);
		933	}
		934
		935	void
1254	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	936	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1255	SV * fh
1256	UV offset
1257	UV length
1258	SV * data
1259	UV dataoffset
1260	SV * callback
1261	ALIAS:	937	ALIAS:
1262	aio_read = REQ_READ	938	aio_read = EIO_READ
1263	aio_write = REQ_WRITE	939	aio_write = EIO_WRITE
1264	PROTOTYPE: $$$$$;$
1265	PPCODE:	940	PPCODE:
1266	{	941	{
1267	aio_req req;
1268	STRLEN svlen;	942	STRLEN svlen;
		943	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1269	char *svptr = SvPVbyte (data, svlen);	944	char *svptr = SvPVbyte (data, svlen);
1270		945	UV len = SvUV (length);
1271	SvUPGRADE (data, SVt_PV);
1272	SvPOK_on (data);
1273		946
1274	if (dataoffset < 0)	947	if (dataoffset < 0)
1275	dataoffset += svlen;	948	dataoffset += svlen;
1276		949
1277	if (dataoffset < 0 || dataoffset > svlen)	950	if (dataoffset < 0 || dataoffset > svlen)
1278	croak ("data offset outside of string");	951	croak ("dataoffset outside of data scalar");
1279		952
1280	if (ix == REQ_WRITE)	953	if (ix == EIO_WRITE)
1281	{	954	{
1282	/* write: check length and adjust. */	955	/* write: check length and adjust. */
1283	if (length < 0 || length + dataoffset > svlen)	956	if (!SvOK (length) || len + dataoffset > svlen)
1284	length = svlen - dataoffset;	957	len = svlen - dataoffset;
1285	}	958	}
1286	else	959	else
1287	{	960	{
1288	/* read: grow scalar as necessary */	961	/* read: check type and grow scalar as necessary */
		962	SvUPGRADE (data, SVt_PV);
1289	svptr = SvGROW (data, length + dataoffset);	963	svptr = SvGROW (data, len + dataoffset + 1);
1290	}	964	}
1291
1292	if (length < 0)
1293	croak ("length must not be negative");
1294		965
1295	{	966	{
1296	dREQ;	967	dREQ;
1297		968
1298	req->type = ix;	969	req->type = ix;
1299	req->fh = newSVsv (fh);	970	req->sv1 = newSVsv (fh);
1300	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	971	req->int1 = fd;
1301	: IoOFP (sv_2io (fh)));	972	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1302	req->offset = offset;	973	req->size = len;
1303	req->length = length;
1304	req->data = SvREFCNT_inc (data);	974	req->sv2 = SvREFCNT_inc (data);
1305	req->dataptr = (char *)svptr + dataoffset;	975	req->ptr2 = (char *)svptr + dataoffset;
		976	req->stroffset = dataoffset;
1306		977
1307	if (!SvREADONLY (data))	978	if (!SvREADONLY (data))
1308	{	979	{
1309	SvREADONLY_on (data);	980	SvREADONLY_on (data);
1310	req->data2ptr = (void *)data;	981	req->flags |= FLAG_SV2_RO_OFF;
1311	}	982	}
1312		983
1313	REQ_SEND;	984	REQ_SEND;
1314	}	985	}
1315	}	986	}
1316		987
1317	void	988	void
1318	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	989	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
1319	SV * out_fh
1320	SV * in_fh
1321	UV in_offset
1322	UV length
1323	SV * callback
1324	PROTOTYPE: $$$$;$
1325	PPCODE:	990	PPCODE:
1326	{	991	{
		992	SV *data;
		993	dREQ;
		994
		995	req->type = EIO_READLINK;
		996	req->sv1 = newSVsv (path);
		997	req->ptr1 = SvPVbyte_nolen (req->sv1);
		998
		999	REQ_SEND;
		1000	}
		1001
		1002	void
		1003	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		1004	PPCODE:
		1005	{
		1006	int ifd = s_fileno_croak (in_fh , 0);
		1007	int ofd = s_fileno_croak (out_fh, 1);
1327	dREQ;	1008	dREQ;
1328		1009
1329	req->type = REQ_SENDFILE;	1010	req->type = EIO_SENDFILE;
1330	req->fh = newSVsv (out_fh);	1011	req->sv1 = newSVsv (out_fh);
1331	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	1012	req->int1 = ofd;
1332	req->fh2 = newSVsv (in_fh);	1013	req->sv2 = newSVsv (in_fh);
1333	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	1014	req->int2 = ifd;
1334	req->offset = in_offset;	1015	req->offs = in_offset;
1335	req->length = length;	1016	req->size = length;
1336		1017
1337	REQ_SEND;	1018	REQ_SEND;
1338	}	1019	}
1339		1020
1340	void	1021	void
1341	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	1022	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1342	SV * fh
1343	UV offset
1344	IV length
1345	SV * callback
1346	PROTOTYPE: $$$;$
1347	PPCODE:	1023	PPCODE:
1348	{	1024	{
		1025	int fd = s_fileno_croak (fh, 0);
1349	dREQ;	1026	dREQ;
1350		1027
1351	req->type = REQ_READAHEAD;	1028	req->type = EIO_READAHEAD;
1352	req->fh = newSVsv (fh);	1029	req->sv1 = newSVsv (fh);
1353	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	1030	req->int1 = fd;
1354	req->offset = offset;	1031	req->offs = offset;
1355	req->length = length;	1032	req->size = length;
1356		1033
1357	REQ_SEND;	1034	REQ_SEND;
1358	}	1035	}
1359		1036
1360	void	1037	void
1361	aio_stat (fh_or_path,callback=&PL_sv_undef)	1038	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1362	SV * fh_or_path
1363	SV * callback
1364	ALIAS:	1039	ALIAS:
1365	aio_stat = REQ_STAT	1040	aio_stat = EIO_STAT
1366	aio_lstat = REQ_LSTAT	1041	aio_lstat = EIO_LSTAT
		1042	aio_statvfs = EIO_STATVFS
1367	PPCODE:	1043	PPCODE:
1368	{	1044	{
1369	dREQ;	1045	dREQ;
1370		1046
1371	New (0, req->statdata, 1, Stat_t);	1047	req->sv1 = newSVsv (fh_or_path);
1372	if (!req->statdata)
1373	{
1374	req_free (req);
1375	croak ("out of memory during aio_req->statdata allocation");
1376	}
1377		1048
1378	if (SvPOK (fh_or_path))	1049	if (SvPOK (req->sv1))
1379	{	1050	{
1380	req->type = ix;	1051	req->type = ix;
1381	req->data = newSVsv (fh_or_path);
1382	req->dataptr = SvPVbyte_nolen (req->data);	1052	req->ptr1 = SvPVbyte_nolen (req->sv1);
1383	}	1053	}
1384	else	1054	else
1385	{	1055	{
1386	req->type = REQ_FSTAT;	1056	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1387	req->fh = newSVsv (fh_or_path);
1388	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	1057	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1389	}	1058	}
1390		1059
1391	REQ_SEND;	1060	REQ_SEND;
1392	}	1061	}
1393		1062
1394	void	1063	void
		1064	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		1065	PPCODE:
		1066	{
		1067	dREQ;
		1068
		1069	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		1070	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		1071	req->sv1 = newSVsv (fh_or_path);
		1072
		1073	if (SvPOK (req->sv1))
		1074	{
		1075	req->type = EIO_UTIME;
		1076	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1077	}
		1078	else
		1079	{
		1080	req->type = EIO_FUTIME;
		1081	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1082	}
		1083
		1084	REQ_SEND;
		1085	}
		1086
		1087	void
		1088	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		1089	PPCODE:
		1090	{
		1091	dREQ;
		1092
		1093	req->sv1 = newSVsv (fh_or_path);
		1094	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		1095
		1096	if (SvPOK (req->sv1))
		1097	{
		1098	req->type = EIO_TRUNCATE;
		1099	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1100	}
		1101	else
		1102	{
		1103	req->type = EIO_FTRUNCATE;
		1104	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1105	}
		1106
		1107	REQ_SEND;
		1108	}
		1109
		1110	void
		1111	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		1112	ALIAS:
		1113	aio_chmod = EIO_CHMOD
		1114	aio_mkdir = EIO_MKDIR
		1115	PPCODE:
		1116	{
		1117	dREQ;
		1118
		1119	req->int2 = mode;
		1120	req->sv1 = newSVsv (fh_or_path);
		1121
		1122	if (SvPOK (req->sv1))
		1123	{
		1124	req->type = ix;
		1125	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1126	}
		1127	else
		1128	{
		1129	req->type = EIO_FCHMOD;
		1130	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1131	}
		1132
		1133	REQ_SEND;
		1134	}
		1135
		1136	void
		1137	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1138	PPCODE:
		1139	{
		1140	dREQ;
		1141
		1142	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1143	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1144	req->sv1 = newSVsv (fh_or_path);
		1145
		1146	if (SvPOK (req->sv1))
		1147	{
		1148	req->type = EIO_CHOWN;
		1149	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1150	}
		1151	else
		1152	{
		1153	req->type = EIO_FCHOWN;
		1154	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1155	}
		1156
		1157	REQ_SEND;
		1158	}
		1159
		1160	void
		1161	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1162	PPCODE:
		1163	{
		1164	dREQ;
		1165
		1166	req->type = EIO_READDIR;
		1167	req->sv1 = newSVsv (pathname);
		1168	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1169	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1170
		1171	if (flags & EIO_READDIR_DENTS)
		1172	req->int1 |= EIO_READDIR_CUSTOM2;
		1173
		1174	REQ_SEND;
		1175	}
		1176
		1177	void
1395	aio_unlink (pathname,callback=&PL_sv_undef)	1178	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1396	SV * pathname
1397	SV * callback
1398	ALIAS:	1179	ALIAS:
1399	aio_unlink = REQ_UNLINK	1180	aio_unlink = EIO_UNLINK
1400	aio_rmdir = REQ_RMDIR	1181	aio_rmdir = EIO_RMDIR
1401	aio_readdir = REQ_READDIR	1182	aio_readdir = EIO_READDIR
1402	PPCODE:	1183	PPCODE:
1403	{	1184	{
1404	dREQ;	1185	dREQ;
1405		1186
1406	req->type = ix;	1187	req->type = ix;
1407	req->data = newSVsv (pathname);	1188	req->sv1 = newSVsv (pathname);
1408	req->dataptr = SvPVbyte_nolen (req->data);	1189	req->ptr1 = SvPVbyte_nolen (req->sv1);
1409		1190
1410	REQ_SEND;	1191	REQ_SEND;
1411	}	1192	}
1412		1193
1413	void	1194	void
1414	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1195	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1415	SV * oldpath
1416	SV * newpath
1417	SV * callback
1418	ALIAS:	1196	ALIAS:
1419	aio_link = REQ_LINK	1197	aio_link = EIO_LINK
1420	aio_symlink = REQ_SYMLINK	1198	aio_symlink = EIO_SYMLINK
1421	aio_rename = REQ_RENAME	1199	aio_rename = EIO_RENAME
1422	PPCODE:	1200	PPCODE:
1423	{	1201	{
1424	dREQ;	1202	dREQ;
1425		1203
1426	req->type = ix;	1204	req->type = ix;
1427	req->fh = newSVsv (oldpath);	1205	req->sv1 = newSVsv (oldpath);
1428	req->data2ptr = SvPVbyte_nolen (req->fh);	1206	req->ptr1 = SvPVbyte_nolen (req->sv1);
1429	req->data = newSVsv (newpath);	1207	req->sv2 = newSVsv (newpath);
1430	req->dataptr = SvPVbyte_nolen (req->data);	1208	req->ptr2 = SvPVbyte_nolen (req->sv2);
1431		1209
1432	REQ_SEND;	1210	REQ_SEND;
1433	}	1211	}
1434		1212
1435	void	1213	void
1436	aio_mknod (pathname,mode,dev,callback=&PL_sv_undef)	1214	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1437	SV * pathname
1438	SV * callback
1439	UV mode
1440	UV dev
1441	PPCODE:	1215	PPCODE:
1442	{	1216	{
1443	dREQ;	1217	dREQ;
1444		1218
1445	req->type = REQ_MKNOD;	1219	req->type = EIO_MKNOD;
1446	req->data = newSVsv (pathname);	1220	req->sv1 = newSVsv (pathname);
1447	req->dataptr = SvPVbyte_nolen (req->data);	1221	req->ptr1 = SvPVbyte_nolen (req->sv1);
1448	req->mode = (mode_t)mode;	1222	req->int2 = (mode_t)mode;
1449	req->offset = dev;	1223	req->offs = dev;
1450		1224
1451	REQ_SEND;	1225	REQ_SEND;
1452	}	1226	}
1453		1227
1454	void	1228	void
		1229	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1230	ALIAS:
		1231	aio_mtouch = EIO_MTOUCH
		1232	aio_msync = EIO_MSYNC
		1233	PPCODE:
		1234	{
		1235	STRLEN svlen;
		1236	char *svptr = SvPVbyte (data, svlen);
		1237	UV len = SvUV (length);
		1238
		1239	if (offset < 0)
		1240	offset += svlen;
		1241
		1242	if (offset < 0 || offset > svlen)
		1243	croak ("offset outside of scalar");
		1244
		1245	if (!SvOK (length) || len + offset > svlen)
		1246	len = svlen - offset;
		1247
		1248	{
		1249	dREQ;
		1250
		1251	req->type = ix;
		1252	req->sv2 = SvREFCNT_inc (data);
		1253	req->ptr2 = (char *)svptr + offset;
		1254	req->size = len;
		1255	req->int1 = flags;
		1256
		1257	REQ_SEND;
		1258	}
		1259	}
		1260
		1261	void
		1262	aio_mlock (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, SV *callback=&PL_sv_undef)
		1263	PPCODE:
		1264	{
		1265	STRLEN svlen;
		1266	char *svptr = SvPVbyte (data, svlen);
		1267	UV len = SvUV (length);
		1268
		1269	if (offset < 0)
		1270	offset += svlen;
		1271
		1272	if (offset < 0 || offset > svlen)
		1273	croak ("offset outside of scalar");
		1274
		1275	if (!SvOK (length) || len + offset > svlen)
		1276	len = svlen - offset;
		1277
		1278	{
		1279	dREQ;
		1280
		1281	req->type = EIO_MLOCK;
		1282	req->sv2 = SvREFCNT_inc (data);
		1283	req->ptr2 = (char *)svptr + offset;
		1284	req->size = len;
		1285
		1286	REQ_SEND;
		1287	}
		1288	}
		1289
		1290	void
		1291	aio_mlockall (IV flags, SV *callback=&PL_sv_undef)
		1292	PPCODE:
		1293	{
		1294	dREQ;
		1295
		1296	req->type = EIO_MLOCKALL;
		1297	req->int1 = flags;
		1298
		1299	REQ_SEND;
		1300	}
		1301
		1302	void
1455	aio_busy (delay,callback=&PL_sv_undef)	1303	aio_busy (double delay, SV *callback=&PL_sv_undef)
1456	double delay
1457	SV * callback
1458	PPCODE:	1304	PPCODE:
1459	{	1305	{
1460	dREQ;	1306	dREQ;
1461		1307
1462	req->type = REQ_BUSY;	1308	req->type = EIO_BUSY;
1463	req->fd = delay < 0. ? 0 : delay;	1309	req->nv1 = delay < 0. ? 0. : delay;
1464	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1465		1310
1466	REQ_SEND;	1311	REQ_SEND;
1467	}	1312	}
1468		1313
1469	void	1314	void
1470	aio_group (callback=&PL_sv_undef)	1315	aio_group (SV *callback=&PL_sv_undef)
1471	SV * callback
1472	PROTOTYPE: ;$
1473	PPCODE:	1316	PPCODE:
1474	{	1317	{
1475	dREQ;	1318	dREQ;
1476		1319
1477	req->type = REQ_GROUP;	1320	req->type = EIO_GROUP;
		1321
1478	req_send (req);	1322	req_submit (req);
1479
1480	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1323	XPUSHs (req_sv (req, aio_grp_stash));
1481	}	1324	}
1482		1325
1483	void	1326	void
1484	aio_nop (callback=&PL_sv_undef)	1327	aio_nop (SV *callback=&PL_sv_undef)
1485	SV * callback	1328	ALIAS:
		1329	aio_nop = EIO_NOP
		1330	aio_sync = EIO_SYNC
1486	PPCODE:	1331	PPCODE:
1487	{	1332	{
1488	dREQ;	1333	dREQ;
1489		1334
1490	req->type = REQ_NOP;	1335	req->type = ix;
1491		1336
1492	REQ_SEND;	1337	REQ_SEND;
1493	}	1338	}
1494		1339
1495	int	1340	int
1496	aioreq_pri (int pri = 0)	1341	aioreq_pri (int pri = 0)
1497	PROTOTYPE: ;$
1498	CODE:	1342	CODE:
1499	RETVAL = next_pri - PRI_BIAS;	1343	RETVAL = next_pri;
1500	if (items > 0)	1344	if (items > 0)
1501	{	1345	{
1502	if (pri < PRI_MIN) pri = PRI_MIN;	1346	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1503	if (pri > PRI_MAX) pri = PRI_MAX;	1347	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1504	next_pri = pri + PRI_BIAS;	1348	next_pri = pri;
1505	}	1349	}
1506	OUTPUT:	1350	OUTPUT:
1507	RETVAL	1351	RETVAL
1508		1352
1509	void	1353	void
1510	aioreq_nice (int nice = 0)	1354	aioreq_nice (int nice = 0)
1511	CODE:	1355	CODE:
1512	nice = next_pri - nice;	1356	nice = next_pri - nice;
1513	if (nice < PRI_MIN) nice = PRI_MIN;	1357	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
1514	if (nice > PRI_MAX) nice = PRI_MAX;	1358	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
1515	next_pri = nice + PRI_BIAS;	1359	next_pri = nice;
1516		1360
1517	void	1361	void
1518	flush ()	1362	flush ()
		1363	CODE:
		1364	while (eio_nreqs ())
		1365	{
		1366	poll_wait ();
		1367	poll_cb ();
		1368	}
		1369
		1370	int
		1371	poll ()
		1372	CODE:
		1373	poll_wait ();
		1374	RETVAL = poll_cb ();
		1375	OUTPUT:
		1376	RETVAL
		1377
		1378	int
		1379	poll_fileno ()
		1380	CODE:
		1381	RETVAL = s_epipe_fd (&respipe);
		1382	OUTPUT:
		1383	RETVAL
		1384
		1385	int
		1386	poll_cb (...)
1519	PROTOTYPE:	1387	PROTOTYPE:
1520	CODE:	1388	CODE:
1521	while (nreqs)
1522	{
1523	poll_wait ();
1524	poll_cb (0);	1389	RETVAL = poll_cb ();
1525	}
1526
1527	void
1528	poll()
1529	PROTOTYPE:
1530	CODE:
1531	if (nreqs)
1532	{
1533	poll_wait ();
1534	poll_cb (0);
1535	}
1536
1537	int
1538	poll_fileno()
1539	PROTOTYPE:
1540	CODE:
1541	RETVAL = respipe [0];
1542	OUTPUT:	1390	OUTPUT:
1543	RETVAL	1391	RETVAL
1544		1392
		1393	void
		1394	poll_wait ()
		1395	CODE:
		1396	poll_wait ();
		1397
1545	int	1398	int
1546	poll_cb(...)	1399	nreqs ()
1547	PROTOTYPE:
1548	CODE:	1400	CODE:
1549	RETVAL = poll_cb (0);	1401	RETVAL = eio_nreqs ();
1550	OUTPUT:	1402	OUTPUT:
1551	RETVAL	1403	RETVAL
1552		1404
1553	int	1405	int
1554	poll_some(int max = 0)	1406	nready ()
1555	PROTOTYPE: $
1556	CODE:	1407	CODE:
1557	RETVAL = poll_cb (max);	1408	RETVAL = eio_nready ();
1558	OUTPUT:	1409	OUTPUT:
1559	RETVAL	1410	RETVAL
1560		1411
1561	void	1412	int
1562	poll_wait()	1413	npending ()
1563	PROTOTYPE:
1564	CODE:	1414	CODE:
1565	if (nreqs)	1415	RETVAL = eio_npending ();
1566	poll_wait ();
1567
1568	int
1569	nreqs()
1570	PROTOTYPE:
1571	CODE:
1572	RETVAL = nreqs;
1573	OUTPUT:	1416	OUTPUT:
1574	RETVAL	1417	RETVAL
1575		1418
1576	int	1419	int
1577	nready()	1420	nthreads ()
1578	PROTOTYPE:
1579	CODE:	1421	CODE:
1580	RETVAL = get_nready ();	1422	RETVAL = eio_nthreads ();
1581	OUTPUT:	1423	OUTPUT:
1582	RETVAL	1424	RETVAL
1583		1425
1584	int	1426	int
1585	npending()	1427	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
1586	PROTOTYPE:	1428	CODE:
		1429	RETVAL = posix_fadvise (fh, offset, length, advice);
		1430	OUTPUT:
		1431	RETVAL
		1432
		1433	ssize_t
		1434	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1435	CODE:
		1436	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1437	OUTPUT:
		1438	RETVAL
		1439
		1440	void
		1441	mmap (SV *scalar, size_t length, int prot, int flags, SV *fh, off_t offset = 0)
		1442	PPCODE:
		1443	sv_unmagic (scalar, MMAP_MAGIC);
		1444	{
		1445	int fd = SvOK (fh) ? s_fileno_croak (fh, flags & PROT_WRITE) : -1;
		1446	void *addr = (void *)mmap (0, length, prot, flags, fd, offset);
		1447	if (addr == (void *)-1)
		1448	XSRETURN_NO;
		1449
		1450	sv_force_normal (scalar);
		1451
		1452	/* we store the length in mg_obj, as namlen is I32 :/ */
		1453	sv_magicext (scalar, 0, MMAP_MAGIC, &mmap_vtbl, (char *)addr, 0)
		1454	->mg_obj = (SV *)length;
		1455
		1456	SvUPGRADE (scalar, SVt_PV); /* nop... */
		1457
		1458	if (!(prot & PROT_WRITE))
		1459	SvREADONLY_on (scalar);
		1460
		1461	if (SvLEN (scalar))
		1462	Safefree (SvPVX (scalar));
		1463
		1464	SvPVX (scalar) = (char *)addr;
		1465	SvCUR_set (scalar, length);
		1466	SvLEN_set (scalar, 0);
		1467	SvPOK_only (scalar);
		1468
		1469	XSRETURN_YES;
		1470	}
		1471
		1472	void
		1473	munmap (SV *scalar)
1587	CODE:	1474	CODE:
1588	RETVAL = get_npending ();	1475	sv_unmagic (scalar, MMAP_MAGIC);
		1476
		1477	int
		1478	madvise (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef, IV advice_or_prot)
		1479	ALIAS:
		1480	mprotect = 1
		1481	CODE:
		1482	{
		1483	STRLEN svlen;
		1484	void *addr = SvPVbyte (scalar, svlen);
		1485	size_t len = SvUV (length);
		1486
		1487	if (offset < 0)
		1488	offset += svlen;
		1489
		1490	if (offset < 0 || offset > svlen)
		1491	croak ("offset outside of scalar");
		1492
		1493	if (!SvOK (length) || len + offset > svlen)
		1494	len = svlen - offset;
		1495
		1496	addr = (void *)(((intptr_t)addr) + offset);
		1497	eio_page_align (&addr, &len);
		1498
		1499	switch (ix)
		1500	{
		1501	case 0: RETVAL = posix_madvise (addr, len, advice_or_prot); break;
		1502	case 1: RETVAL = mprotect (addr, len, advice_or_prot); break;
		1503	}
		1504	}
1589	OUTPUT:	1505	OUTPUT:
1590	RETVAL	1506	RETVAL
		1507
		1508	int
		1509	munlock (SV *scalar, off_t offset = 0, SV *length = &PL_sv_undef)
		1510	CODE:
		1511	{
		1512	STRLEN svlen;
		1513	void *addr = SvPVbyte (scalar, svlen);
		1514	size_t len = SvUV (length);
		1515
		1516	if (offset < 0)
		1517	offset += svlen;
		1518
		1519	if (offset < 0 || offset > svlen)
		1520	croak ("offset outside of scalar");
		1521
		1522	if (!SvOK (length) || len + offset > svlen)
		1523	len = svlen - offset;
		1524
		1525	addr = (void *)(((intptr_t)addr) + offset);
		1526	eio_page_align (&addr, &len);
		1527	#if _POSIX_MEMLOCK
		1528	RETVAL = munlock (addr, len);
		1529	#else
		1530	RETVAL = ((errno = ENOSYS), -1);
		1531	#endif
		1532	}
		1533	OUTPUT:
		1534	RETVAL
		1535
		1536	int
		1537	munlockall ()
		1538	CODE:
		1539	#if _POSIX_MEMLOCK
		1540	munlockall ();
		1541	#else
		1542	RETVAL = -1;
		1543	errno = ENOSYS;
		1544	#endif
		1545	OUTPUT:
		1546	RETVAL
		1547
		1548	void _on_next_submit (SV *cb)
		1549	CODE:
		1550	SvREFCNT_dec (on_next_submit);
		1551	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
1591		1552
1592	PROTOTYPES: DISABLE	1553	PROTOTYPES: DISABLE
1593		1554
1594	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1555	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1595		1556
1596	void	1557	void
1597	cancel (aio_req_ornot req)	1558	cancel (aio_req_ornot req)
1598	CODE:	1559	CODE:
1599	req_cancel (req);	1560	eio_cancel (req);
1600		1561
1601	void	1562	void
1602	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1563	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1603	CODE:	1564	PPCODE:
		1565	{
		1566	if (GIMME_V != G_VOID)
		1567	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1568
		1569	if (items > 1)
		1570	{
		1571	SV *cb_cv =get_cb (callback);
		1572
1604	SvREFCNT_dec (req->callback);	1573	SvREFCNT_dec (req->callback);
1605	req->callback = newSVsv (callback);	1574	req->callback = SvREFCNT_inc (cb_cv);
		1575	}
		1576	}
1606		1577
1607	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1578	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1608		1579
1609	void	1580	void
1610	add (aio_req grp, ...)	1581	add (aio_req grp, ...)
1611	PPCODE:	1582	PPCODE:
1612	{	1583	{
1613	int i;	1584	int i;
1614	aio_req req;
1615		1585
1616	if (grp->fd == 2)	1586	if (grp->int1 == 2)
1617	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1587	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1618		1588
1619	for (i = 1; i < items; ++i )	1589	for (i = 1; i < items; ++i )
1620	{	1590	{
		1591	aio_req req;
		1592
1621	if (GIMME_V != G_VOID)	1593	if (GIMME_V != G_VOID)
1622	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1594	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1623		1595
1624	req = SvAIO_REQ (ST (i));	1596	req = SvAIO_REQ (ST (i));
1625		1597
1626	if (req)	1598	if (req)
1627	{	1599	eio_grp_add (grp, req);
1628	++grp->length;
1629	req->grp = grp;
1630
1631	req->grp_prev = 0;
1632	req->grp_next = grp->grp_first;
1633
1634	if (grp->grp_first)
1635	grp->grp_first->grp_prev = req;
1636
1637	grp->grp_first = req;
1638	}
1639	}	1600	}
1640	}	1601	}
1641		1602
1642	void	1603	void
1643	cancel_subs (aio_req_ornot req)	1604	cancel_subs (aio_req_ornot req)
…		…
1652	AV *av;	1613	AV *av;
1653		1614
1654	grp->errorno = errno;	1615	grp->errorno = errno;
1655		1616
1656	av = newAV ();	1617	av = newAV ();
		1618	av_extend (av, items - 1);
1657		1619
1658	for (i = 1; i < items; ++i )	1620	for (i = 1; i < items; ++i )
1659	av_push (av, newSVsv (ST (i)));	1621	av_push (av, newSVsv (ST (i)));
1660		1622
1661	SvREFCNT_dec (grp->data);	1623	SvREFCNT_dec (grp->sv1);
1662	grp->data = (SV *)av;	1624	grp->sv1 = (SV *)av;
1663	}	1625	}
1664		1626
1665	void	1627	void
1666	errno (aio_req grp, int errorno = errno)	1628	errno (aio_req grp, int errorno = errno)
1667	CODE:	1629	CODE:
1668	grp->errorno = errorno;	1630	grp->errorno = errorno;
1669		1631
1670	void	1632	void
1671	limit (aio_req grp, int limit)	1633	limit (aio_req grp, int limit)
1672	CODE:	1634	CODE:
1673	grp->fd2 = limit;	1635	eio_grp_limit (grp, limit);
1674	aio_grp_feed (grp);
1675		1636
1676	void	1637	void
1677	feed (aio_req grp, SV *callback=&PL_sv_undef)	1638	feed (aio_req grp, SV *callback=&PL_sv_undef)
1678	CODE:	1639	CODE:
1679	{	1640	{
1680	SvREFCNT_dec (grp->fh2);	1641	SvREFCNT_dec (grp->sv2);
1681	grp->fh2 = newSVsv (callback);	1642	grp->sv2 = newSVsv (callback);
		1643	grp->feed = aio_grp_feed;
1682		1644
1683	if (grp->fd2 <= 0)	1645	if (grp->int2 <= 0)
1684	grp->fd2 = 2;	1646	grp->int2 = 2;
1685		1647
1686	aio_grp_feed (grp);	1648	eio_grp_limit (grp, grp->int2);
1687	}	1649	}
1688		1650

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