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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.64 by root, Mon Oct 23 23:54:41 2006 UTC vs.
Revision 1.158 by root, Sat Jan 2 14:11:32 2010 UTC

1	#if __linux	1	#include "libeio/xthread.h"
2	# define _GNU_SOURCE
3	#endif
4
5	#define _REENTRANT 1
6		2
7	#include <errno.h>	3	#include <errno.h>
8		4
9	#include "EXTERN.h"	5	#include "EXTERN.h"
10	#include "perl.h"	6	#include "perl.h"
11	#include "XSUB.h"	7	#include "XSUB.h"
12		8
13	#include "autoconf/config.h"	9	#include "schmorp.h"
14
15	#include <pthread.h>
16		10
17	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
18	#include <errno.h>	13	#include <errno.h>
19	#include <sys/time.h>
20	#include <sys/select.h>
21	#include <sys/types.h>	14	#include <sys/types.h>
22	#include <sys/stat.h>	15	#include <sys/stat.h>
23	#include <limits.h>	16	#include <limits.h>
24	#include <unistd.h>
25	#include <fcntl.h>	17	#include <fcntl.h>
26	#include <signal.h>
27	#include <sched.h>	18	#include <sched.h>
28		19
29	#if HAVE_SENDFILE	20	/* perl namespace pollution */
30	# if __linux	21	#undef VERSION
31	# include <sys/sendfile.h>	22
32	# elif __freebsd	23	#ifdef _WIN32
33	# include <sys/socket.h>	24
34	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
35	# elif __hpux	26	# undef malloc
36	# include <sys/socket.h>	27	# undef free
37	# elif __solaris /* not yet */	28
38	# include <sys/sendfile.h>	29	// perl overrides all those nice win32 functions
		30	# undef open
		31	# undef read
		32	# undef write
		33	# undef send
		34	# undef recv
		35	# undef stat
		36	# undef fstat
		37	# define lstat stat
		38	# undef truncate
		39	# undef ftruncate
		40	# undef open
		41	# undef close
		42	# undef unlink
		43	# undef rmdir
		44	# undef rename
		45	# undef lseek
		46
		47	# define chown(a,b,c) (errno = ENOSYS, -1)
		48	# define fchown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchmod(a,b) (errno = ENOSYS, -1)
		50	# define symlink(a,b) (errno = ENOSYS, -1)
		51	# define readlink(a,b,c) (errno = ENOSYS, -1)
		52	# define mknod(a,b,c) (errno = ENOSYS, -1)
		53	# define truncate(a,b) (errno = ENOSYS, -1)
		54	# define ftruncate(fd,o) chsize ((fd), (o))
		55	# define fsync(fd) _commit (fd)
		56	# define opendir(fd) (errno = ENOSYS, 0)
		57	# define readdir(fd) (errno = ENOSYS, -1)
		58	# define closedir(fd) (errno = ENOSYS, -1)
		59	# define mkdir(a,b) mkdir (a)
		60
39	# else	61	#else
40	# error sendfile support requested but not available	62
41	# endif	63	# include <sys/time.h>
		64	# include <sys/select.h>
		65	# include <unistd.h>
		66	# include <utime.h>
		67	# include <signal.h>
		68	# define EIO_STRUCT_DIRENT struct dirent
		69
42	#endif	70	#endif
43		71
44	/* used for struct dirent, AIX doesn't provide it */	72	/* perl stupidly overrides readdir and maybe others */
45	#ifndef NAME_MAX	73	/* with thread-unsafe versions, imagine that :( */
46	# define NAME_MAX 4096	74	#undef readdir
		75	#undef opendir
		76	#undef closedir
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
47	#endif	89	#endif
48		90
49	#if __ia64	91	/*****************************************************************************/
50	# define STACKSIZE 65536	92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
51	#else	95	#else
52	# define STACKSIZE 8192	96	# define expect(expr,value) (expr)
53	#endif	97	#endif
54		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	typedef SV SV8; /* byte-sv, used for argument-checking */
		105	typedef int aio_rfd; /* read file desriptor */
		106	typedef int aio_wfd; /* write file descriptor */
		107
		108	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/eio.h"
		119
		120	#ifndef POSIX_FADV_NORMAL
		121	# define POSIX_FADV_NORMAL 0
		122	# define NO_FADVISE 1
		123	#endif
		124
		125	#ifndef POSIX_FADV_SEQUENTIAL
		126	# define POSIX_FADV_SEQUENTIAL 0
		127	#endif
		128
		129	#ifndef POSIX_FADV_RANDOM
		130	# define POSIX_FADV_RANDOM 0
		131	#endif
		132
		133	#ifndef POSIX_FADV_NOREUSE
		134	# define POSIX_FADV_NOREUSE 0
		135	#endif
		136
		137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	static int req_invoke (eio_req *req);
		146	#define EIO_FINISH(req) req_invoke (req)
		147	static void req_destroy (eio_req *grp);
		148	#define EIO_DESTROY(req) req_destroy (req)
		149
55	enum {	150	enum {
56	REQ_QUIT,	151	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
57	REQ_OPEN, REQ_CLOSE,
58	REQ_READ, REQ_WRITE, REQ_READAHEAD,
59	REQ_SENDFILE,
60	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
61	REQ_FSYNC, REQ_FDATASYNC,
62	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
63	REQ_READDIR,
64	REQ_LINK, REQ_SYMLINK,
65	REQ_GROUP, REQ_NOP,
66	REQ_SLEEP,
67	};	152	};
68		153
69	#define AIO_REQ_KLASS "IO::AIO::REQ"	154	#include "libeio/eio.c"
70	#define AIO_GRP_KLASS "IO::AIO::GRP"
71		155
72	typedef struct aio_cb
73	{
74	struct aio_cb *volatile next;
75
76	SV *data, *callback;
77	SV *fh, *fh2;
78	void *dataptr, *data2ptr;
79	Stat_t *statdata;
80	off_t offset;
81	size_t length;
82	ssize_t result;
83
84	STRLEN dataoffset;
85	int type;
86	int fd, fd2;
87	int errorno;
88	mode_t mode; /* open */
89
90	unsigned char flags;
91	unsigned char pri;
92
93	SV *self; /* the perl counterpart of this request, if any */
94	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
95	} aio_cb;
96
97	enum {
98	FLAG_CANCELLED = 0x01,
99	};
100
101	typedef aio_cb *aio_req;	156	typedef eio_req *aio_req;
102	typedef aio_cb *aio_req_ornot;	157	typedef eio_req *aio_req_ornot;
103		158
104	enum {	159	static SV *on_next_submit;
105	PRI_MIN = -4,	160	static int next_pri = EIO_PRI_DEFAULT;
106	PRI_MAX = 4,
107
108	DEFAULT_PRI = 0,
109	PRI_BIAS = -PRI_MIN,
110	};
111
112	static int next_pri = DEFAULT_PRI + PRI_BIAS;
113
114	static int started, wanted;
115	static volatile int nreqs;
116	static int max_outstanding = 1<<30;	161	static int max_outstanding;
117	static int respipe [2];
118		162
119	#if __linux && defined (PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP)	163	static s_epipe respipe;
120	# define AIO_MUTEX_INIT PTHREAD_ADAPTIVE_MUTEX_INITIALIZER_NP
121	#else
122	# define AIO_MUTEX_INIT PTHREAD_MUTEX_INITIALIZER
123	#endif
124		164
125	static pthread_mutex_t reslock = AIO_MUTEX_INIT;	165	static void req_destroy (aio_req req);
126	static pthread_mutex_t reqlock = AIO_MUTEX_INIT;
127	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
128
129	static volatile aio_req reqs, reqe; /* queue start, queue end */
130	static volatile aio_req ress, rese; /* queue start, queue end */
131
132	static void req_invoke (aio_req req);	166	static void req_cancel (aio_req req);
133	static void req_free (aio_req req);	167
		168	static void want_poll (void)
		169	{
		170	/* write a dummy byte to the pipe so fh becomes ready */
		171	s_epipe_signal (&respipe);
		172	}
		173
		174	static void done_poll (void)
		175	{
		176	/* read any signals sent by the worker threads */
		177	s_epipe_drain (&respipe);
		178	}
134		179
135	/* must be called at most once */	180	/* must be called at most once */
136	static SV *req_sv (aio_req req, const char *klass)	181	static SV *req_sv (aio_req req, HV *stash)
137	{	182	{
138	if (!req->self)	183	if (!req->self)
139	{	184	{
140	req->self = (SV *)newHV ();	185	req->self = (SV *)newHV ();
141	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	186	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
142	}	187	}
143		188
144	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	189	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
145	}	190	}
146		191
147	static aio_req SvAIO_REQ (SV *sv)	192	static aio_req SvAIO_REQ (SV *sv)
148	{	193	{
149	MAGIC *mg;	194	MAGIC *mg;
150		195
151	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	196	if (!SvROK (sv)
		197	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		198	&& SvSTASH (SvRV (sv)) != aio_req_stash
		199	&& !sv_derived_from (sv, "IO::AIO::REQ")))
152	croak ("object of class " AIO_REQ_KLASS " expected");	200	croak ("object of class IO::AIO::REQ expected");
153		201
154	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	202	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
155		203
156	return mg ? (aio_req)mg->mg_ptr : 0;	204	return mg ? (aio_req)mg->mg_ptr : 0;
157	}	205	}
158		206
159	static void aio_grp_feed (aio_req grp)	207	static void aio_grp_feed (aio_req grp)
160	{	208	{
161	while (grp->length < grp->fd2 && !(grp->flags & FLAG_CANCELLED))	209	if (grp->sv2 && SvOK (grp->sv2))
162	{	210	{
163	int old_len = grp->length;	211	dSP;
164		212
165	if (grp->fh2 && SvOK (grp->fh2))	213	ENTER;
		214	SAVETMPS;
		215	PUSHMARK (SP);
		216	XPUSHs (req_sv (grp, aio_grp_stash));
		217	PUTBACK;
		218	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		219	SPAGAIN;
		220	FREETMPS;
		221	LEAVE;
		222	}
		223	}
		224
		225	static void req_submit (eio_req *req)
		226	{
		227	eio_submit (req);
		228
		229	if (expect_false (on_next_submit))
		230	{
		231	dSP;
		232	SV *cb = sv_2mortal (on_next_submit);
		233
		234	on_next_submit = 0;
		235
		236	PUSHMARK (SP);
		237	PUTBACK;
		238	call_sv (cb, G_DISCARD | G_EVAL);
		239	}
		240	}
		241
		242	static int req_invoke (eio_req *req)
		243	{
		244	dSP;
		245
		246	if (req->flags & FLAG_SV2_RO_OFF)
		247	SvREADONLY_off (req->sv2);
		248
		249	if (!EIO_CANCELLED (req) && req->callback)
		250	{
		251	ENTER;
		252	SAVETMPS;
		253	PUSHMARK (SP);
		254	EXTEND (SP, 1);
		255
		256	switch (req->type)
166	{	257	{
167	dSP;	258	case EIO_READDIR:
		259	{
		260	SV *rv = &PL_sv_undef;
168		261
169	ENTER;	262	if (req->result >= 0)
170	SAVETMPS;	263	{
171	PUSHMARK (SP);	264	int i;
172	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	265	char *names = (char *)req->ptr2;
173	PUTBACK;	266	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
174	call_sv (grp->fh2, G_VOID | G_EVAL);	267	AV *av = newAV ();
175	SPAGAIN;	268
176	FREETMPS;	269	av_extend (av, req->result - 1);
177	LEAVE;	270
		271	for (i = 0; i < req->result; ++i)
		272	{
		273	if (req->int1 & EIO_READDIR_DENTS)
		274	{
		275	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		276
		277	if (req->int1 & EIO_READDIR_CUSTOM2)
		278	{
		279	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		280	AV *avent = newAV ();
		281
		282	av_extend (avent, 2);
		283
		284	if (!sv_type [ent->type])
		285	{
		286	sv_type [ent->type] = newSViv (ent->type);
		287	SvREADONLY_on (sv_type [ent->type]);
		288	}
		289
		290	av_store (avent, 0, namesv);
		291	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		292	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		293
		294	av_store (av, i, newRV_noinc ((SV *)avent));
		295	}
		296	else
		297	av_store (av, i, namesv);
		298
		299	++ent;
		300	}
		301	else
		302	{
		303	SV *name = newSVpv (names, 0);
		304	av_store (av, i, name);
		305	names += SvCUR (name) + 1;
		306	}
		307	}
		308
		309	rv = sv_2mortal (newRV_noinc ((SV *)av));
		310	}
		311
		312	PUSHs (rv);
		313
		314	if (req->int1 & EIO_READDIR_CUSTOM1)
		315	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		316	}
		317	break;
		318
		319	case EIO_OPEN:
		320	{
		321	/* convert fd to fh */
		322	SV *fh = &PL_sv_undef;
		323
		324	if (req->result >= 0)
		325	{
		326	GV *gv = (GV *)sv_newmortal ();
		327	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		328	char sym [64];
		329	int symlen;
		330
		331	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		332	gv_init (gv, aio_stash, sym, symlen, 0);
		333
		334	symlen = snprintf (
		335	sym,
		336	sizeof (sym),
		337	"%s&=%d",
		338	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		339	(int)req->result
		340	);
		341
		342	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		343	fh = (SV *)gv;
		344	}
		345
		346	PUSHs (fh);
		347	}
		348	break;
		349
		350	case EIO_GROUP:
		351	req->int1 = 2; /* mark group as finished */
		352
		353	if (req->sv1)
		354	{
		355	int i;
		356	AV *av = (AV *)req->sv1;
		357
		358	EXTEND (SP, AvFILL (av) + 1);
		359	for (i = 0; i <= AvFILL (av); ++i)
		360	PUSHs (*av_fetch (av, i, 0));
		361	}
		362	break;
		363
		364	case EIO_NOP:
		365	case EIO_BUSY:
		366	break;
		367
		368	case EIO_READLINK:
		369	if (req->result > 0)
		370	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		371	break;
		372
		373	case EIO_STAT:
		374	case EIO_LSTAT:
		375	case EIO_FSTAT:
		376	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		377	PL_laststatval = req->result;
		378	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		379	PUSHs (sv_2mortal (newSViv (req->result)));
		380	break;
		381
		382	case EIO_READ:
		383	{
		384	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		385	*SvEND (req->sv2) = 0;
		386	SvPOK_only (req->sv2);
		387	SvSETMAGIC (req->sv2);
		388	PUSHs (sv_2mortal (newSViv (req->result)));
		389	}
		390	break;
		391
		392	case EIO_DUP2:
		393	if (req->result > 0)
		394	req->result = 0;
		395	/* FALLTHROUGH */
		396
		397	default:
		398	PUSHs (sv_2mortal (newSViv (req->result)));
		399	break;
178	}	400	}
179		401
180	/* stop if no progress has been made */	402	errno = req->errorno;
181	if (old_len == grp->length)	403
182	{	404	PUTBACK;
183	SvREFCNT_dec (grp->fh2);	405	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
184	grp->fh2 = 0;	406	SPAGAIN;
185	break;	407
186	}	408	FREETMPS;
		409	LEAVE;
		410
		411	PUTBACK;
187	}	412	}
188	}
189		413
190	static void aio_grp_dec (aio_req grp)	414	return !!SvTRUE (ERRSV);
191	{
192	--grp->length;
193
194	/* call feeder, if applicable */
195	aio_grp_feed (grp);
196
197	/* finish, if done */
198	if (!grp->length && grp->fd)
199	{
200	req_invoke (grp);
201	req_free (grp);
202	}
203	}	415	}
204		416
205	static void poll_wait ()
206	{
207	fd_set rfd;
208
209	while (nreqs)
210	{
211	aio_req req;
212	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
213	pthread_mutex_lock (&reslock);
214	#endif
215	req = ress;
216	#if !(__x86 || __x86_64) /* safe without sempahore on this archs */
217	pthread_mutex_unlock (&reslock);
218	#endif
219
220	if (req)
221	return;
222
223	FD_ZERO(&rfd);
224	FD_SET(respipe [0], &rfd);
225
226	select (respipe [0] + 1, &rfd, 0, 0, 0);
227	}
228	}
229
230	static void req_invoke (aio_req req)
231	{
232	dSP;
233	int errorno = errno;
234
235	if (req->flags & FLAG_CANCELLED || !SvOK (req->callback))
236	return;
237
238	errno = req->errorno;
239
240	ENTER;
241	SAVETMPS;
242	PUSHMARK (SP);
243	EXTEND (SP, 1);
244
245	switch (req->type)
246	{
247	case REQ_READDIR:
248	{
249	SV *rv = &PL_sv_undef;
250
251	if (req->result >= 0)
252	{
253	char *buf = req->data2ptr;
254	AV *av = newAV ();
255
256	while (req->result)
257	{
258	SV *sv = newSVpv (buf, 0);
259
260	av_push (av, sv);
261	buf += SvCUR (sv) + 1;
262	req->result--;
263	}
264
265	rv = sv_2mortal (newRV_noinc ((SV *)av));
266	}
267
268	PUSHs (rv);
269	}
270	break;
271
272	case REQ_OPEN:
273	{
274	/* convert fd to fh */
275	SV *fh;
276
277	PUSHs (sv_2mortal (newSViv (req->result)));
278	PUTBACK;
279	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
280	SPAGAIN;
281
282	fh = SvREFCNT_inc (POPs);
283
284	PUSHMARK (SP);
285	XPUSHs (sv_2mortal (fh));
286	}
287	break;
288
289	case REQ_GROUP:
290	req->fd = 2; /* mark group as finished */
291
292	if (req->data)
293	{
294	int i;
295	AV *av = (AV *)req->data;
296
297	EXTEND (SP, AvFILL (av) + 1);
298	for (i = 0; i <= AvFILL (av); ++i)
299	PUSHs (*av_fetch (av, i, 0));
300	}
301	break;
302
303	case REQ_NOP:
304	case REQ_SLEEP:
305	break;
306
307	default:
308	PUSHs (sv_2mortal (newSViv (req->result)));
309	break;
310	}
311
312
313	PUTBACK;
314	call_sv (req->callback, G_VOID | G_EVAL);
315	SPAGAIN;
316
317	FREETMPS;
318	LEAVE;
319
320	errno = errorno;
321
322	if (SvTRUE (ERRSV))
323	{
324	req_free (req);
325	croak (0);
326	}
327	}
328
329	static void req_free (aio_req req)	417	static void req_destroy (aio_req req)
330	{	418	{
331	if (req->grp)
332	{
333	aio_req grp = req->grp;
334
335	/* unlink request */
336	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
337	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
338
339	if (grp->grp_first == req)
340	grp->grp_first = req->grp_next;
341
342	aio_grp_dec (grp);
343	}
344
345	if (req->self)	419	if (req->self)
346	{	420	{
347	sv_unmagic (req->self, PERL_MAGIC_ext);	421	sv_unmagic (req->self, PERL_MAGIC_ext);
348	SvREFCNT_dec (req->self);	422	SvREFCNT_dec (req->self);
349	}	423	}
350		424
351	SvREFCNT_dec (req->data);
352	SvREFCNT_dec (req->fh);	425	SvREFCNT_dec (req->sv1);
353	SvREFCNT_dec (req->fh2);	426	SvREFCNT_dec (req->sv2);
354	SvREFCNT_dec (req->callback);	427	SvREFCNT_dec (req->callback);
355	Safefree (req->statdata);
356
357	if (req->type == REQ_READDIR && req->result >= 0)
358	free (req->data2ptr);
359		428
360	Safefree (req);	429	Safefree (req);
361	}	430	}
362		431
363	static void req_cancel (aio_req req)	432	static void req_cancel_subs (aio_req grp)
364	{	433	{
365	req->flags |= FLAG_CANCELLED;	434	aio_req sub;
366		435
367	if (req->type == REQ_GROUP)	436	if (grp->type != EIO_GROUP)
		437	return;
		438
		439	SvREFCNT_dec (grp->sv2);
		440	grp->sv2 = 0;
		441
		442	eio_grp_cancel (grp);
		443	}
		444
		445	static void
		446	create_respipe (void)
		447	{
		448	if (s_epipe_renew (&respipe))
		449	croak ("IO::AIO: unable to initialize result pipe");
		450	}
		451
		452	static void poll_wait (void)
		453	{
		454	while (eio_nreqs ())
368	{	455	{
369	aio_req sub;	456	int size;
370		457
371	for (sub = req->grp_first; sub; sub = sub->grp_next)	458	X_LOCK (reslock);
372	req_cancel (sub);	459	size = res_queue.size;
		460	X_UNLOCK (reslock);
		461
		462	if (size)
		463	return;
		464
		465	etp_maybe_start_thread ();
		466
		467	s_epipe_wait (&respipe);
373	}	468	}
374	}	469	}
375		470
376	static int poll_cb ()	471	static int poll_cb (void)
377	{	472	{
378	dSP;
379	int count = 0;
380	int do_croak = 0;
381	aio_req req;
382
383	for (;;)	473	for (;;)
384	{	474	{
385	pthread_mutex_lock (&reslock);	475	int res = eio_poll ();
386	req = ress;
387		476
388	if (req)	477	if (res > 0)
389	{
390	ress = req->next;
391
392	if (!ress)
393	{
394	/* read any signals sent by the worker threads */
395	char buf [32];
396	while (read (respipe [0], buf, 32) == 32)
397	;
398
399	rese = 0;
400	}
401	}
402
403	pthread_mutex_unlock (&reslock);
404
405	if (!req)
406	break;	478	croak (0);
407		479
408	--nreqs;	480	if (!max_outstanding || max_outstanding > eio_nreqs ())
		481	return res;
409		482
410	if (req->type == REQ_QUIT)	483	poll_wait ();
411	started--;
412	else if (req->type == REQ_GROUP && req->length)
413	{
414	req->fd = 1; /* mark request as delayed */
415	continue;
416	}
417	else
418	{
419	if (req->type == REQ_READ)
420	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
421
422	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
423	SvREADONLY_off (req->data);
424
425	if (req->statdata)
426	{
427	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
428	PL_laststatval = req->result;
429	PL_statcache = *(req->statdata);
430	}
431
432	req_invoke (req);
433
434	count++;
435	}
436
437	req_free (req);
438	}	484	}
439
440	return count;
441	}
442
443	static void *aio_proc(void *arg);
444
445	static void start_thread (void)
446	{
447	sigset_t fullsigset, oldsigset;
448	pthread_t tid;
449	pthread_attr_t attr;
450
451	pthread_attr_init (&attr);
452	pthread_attr_setstacksize (&attr, STACKSIZE);
453	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
454
455	sigfillset (&fullsigset);
456	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
457
458	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
459	started++;
460
461	sigprocmask (SIG_SETMASK, &oldsigset, 0);
462	}
463
464	static void req_send (aio_req req)
465	{
466	while (started < wanted && nreqs >= started)
467	start_thread ();
468
469	++nreqs;
470
471	pthread_mutex_lock (&reqlock);
472
473	req->next = 0;
474
475	if (reqe)
476	{
477	reqe->next = req;
478	reqe = req;
479	}
480	else
481	reqe = reqs = req;
482
483	pthread_cond_signal (&reqwait);
484	pthread_mutex_unlock (&reqlock);
485
486	if (nreqs > max_outstanding)
487	for (;;)
488	{
489	poll_cb ();
490
491	if (nreqs <= max_outstanding)
492	break;
493
494	poll_wait ();
495	}
496	}
497
498	static void end_thread (void)
499	{
500	aio_req req;
501	Newz (0, req, 1, aio_cb);
502	req->type = REQ_QUIT;
503
504	req_send (req);
505	}
506
507	static void min_parallel (int nthreads)
508	{
509	if (wanted < nthreads)
510	wanted = nthreads;
511	}
512
513	static void max_parallel (int nthreads)
514	{
515	int cur = started;
516
517	if (wanted > nthreads)
518	wanted = nthreads;
519
520	while (cur > wanted)
521	{
522	end_thread ();
523	cur--;
524	}
525
526	while (started > wanted)
527	{
528	poll_wait ();
529	poll_cb ();
530	}
531	}
532
533	static void create_pipe ()
534	{
535	if (pipe (respipe))
536	croak ("unable to initialize result pipe");
537
538	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
539	croak ("cannot set result pipe to nonblocking mode");
540
541	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
542	croak ("cannot set result pipe to nonblocking mode");
543	}
544
545	/*****************************************************************************/
546	/* work around various missing functions */
547
548	#if !HAVE_PREADWRITE
549	# define pread aio_pread
550	# define pwrite aio_pwrite
551
552	/*
553	* make our pread/pwrite safe against themselves, but not against
554	* normal read/write by using a mutex. slows down execution a lot,
555	* but that's your problem, not mine.
556	*/
557	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
558
559	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
560	{
561	ssize_t res;
562	off_t ooffset;
563
564	pthread_mutex_lock (&preadwritelock);
565	ooffset = lseek (fd, 0, SEEK_CUR);
566	lseek (fd, offset, SEEK_SET);
567	res = read (fd, buf, count);
568	lseek (fd, ooffset, SEEK_SET);
569	pthread_mutex_unlock (&preadwritelock);
570
571	return res;
572	}
573
574	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
575	{
576	ssize_t res;
577	off_t ooffset;
578
579	pthread_mutex_lock (&preadwritelock);
580	ooffset = lseek (fd, 0, SEEK_CUR);
581	lseek (fd, offset, SEEK_SET);
582	res = write (fd, buf, count);
583	lseek (fd, offset, SEEK_SET);
584	pthread_mutex_unlock (&preadwritelock);
585
586	return res;
587	}
588	#endif
589
590	#if !HAVE_FDATASYNC
591	# define fdatasync fsync
592	#endif
593
594	#if !HAVE_READAHEAD
595	# define readahead aio_readahead
596
597	static ssize_t readahead (int fd, off_t offset, size_t count)
598	{
599	char readahead_buf[4096];
600
601	while (count > 0)
602	{
603	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
604
605	pread (fd, readahead_buf, len, offset);
606	offset += len;
607	count -= len;
608	}
609
610	errno = 0;
611	}
612	#endif
613
614	#if !HAVE_READDIR_R
615	# define readdir_r aio_readdir_r
616
617	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
618
619	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
620	{
621	struct dirent *e;
622	int errorno;
623
624	pthread_mutex_lock (&readdirlock);
625
626	e = readdir (dirp);
627	errorno = errno;
628
629	if (e)
630	{
631	*res = ent;
632	strcpy (ent->d_name, e->d_name);
633	}
634	else
635	*res = 0;
636
637	pthread_mutex_unlock (&readdirlock);
638
639	errno = errorno;
640	return e ? 0 : -1;
641	}
642	#endif
643
644	/* sendfile always needs emulation */
645	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
646	{
647	ssize_t res;
648
649	if (!count)
650	return 0;
651
652	#if HAVE_SENDFILE
653	# if __linux
654	res = sendfile (ofd, ifd, &offset, count);
655
656	# elif __freebsd
657	/*
658	* Of course, the freebsd sendfile is a dire hack with no thoughts
659	* wasted on making it similar to other I/O functions.
660	*/
661	{
662	off_t sbytes;
663	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
664
665	if (res < 0 && sbytes)
666	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
667	res = sbytes;
668	}
669
670	# elif __hpux
671	res = sendfile (ofd, ifd, offset, count, 0, 0);
672
673	# elif __solaris
674	{
675	struct sendfilevec vec;
676	size_t sbytes;
677
678	vec.sfv_fd = ifd;
679	vec.sfv_flag = 0;
680	vec.sfv_off = offset;
681	vec.sfv_len = count;
682
683	res = sendfilev (ofd, &vec, 1, &sbytes);
684
685	if (res < 0 && sbytes)
686	res = sbytes;
687	}
688
689	# endif
690	#else
691	res = -1;
692	errno = ENOSYS;
693	#endif
694
695	if (res < 0
696	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
697	#if __solaris
698	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
699	#endif
700	)
701	)
702	{
703	/* emulate sendfile. this is a major pain in the ass */
704	char buf[4096];
705	res = 0;
706
707	while (count)
708	{
709	ssize_t cnt;
710
711	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
712
713	if (cnt <= 0)
714	{
715	if (cnt && !res) res = -1;
716	break;
717	}
718
719	cnt = write (ofd, buf, cnt);
720
721	if (cnt <= 0)
722	{
723	if (cnt && !res) res = -1;
724	break;
725	}
726
727	offset += cnt;
728	res += cnt;
729	count -= cnt;
730	}
731	}
732
733	return res;
734	}
735
736	/* read a full directory */
737	static int scandir_ (const char *path, void **namesp)
738	{
739	DIR *dirp = opendir (path);
740	union
741	{
742	struct dirent d;
743	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
744	} u;
745	struct dirent *entp;
746	char *name, *names;
747	int memlen = 4096;
748	int memofs = 0;
749	int res = 0;
750	int errorno;
751
752	if (!dirp)
753	return -1;
754
755	names = malloc (memlen);
756
757	for (;;)
758	{
759	errno = 0, readdir_r (dirp, &u.d, &entp);
760
761	if (!entp)
762	break;
763
764	name = entp->d_name;
765
766	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
767	{
768	int len = strlen (name) + 1;
769
770	res++;
771
772	while (memofs + len > memlen)
773	{
774	memlen *= 2;
775	names = realloc (names, memlen);
776	if (!names)
777	break;
778	}
779
780	memcpy (names + memofs, name, len);
781	memofs += len;
782	}
783	}
784
785	errorno = errno;
786	closedir (dirp);
787
788	if (errorno)
789	{
790	free (names);
791	errno = errorno;
792	res = -1;
793	}
794
795	*namesp = (void *)names;
796	return res;
797	}
798
799	/*****************************************************************************/
800
801	static void *aio_proc (void *thr_arg)
802	{
803	aio_req req;
804	int type;
805
806	do
807	{
808	pthread_mutex_lock (&reqlock);
809
810	for (;;)
811	{
812	req = reqs;
813
814	if (reqs)
815	{
816	reqs = reqs->next;
817	if (!reqs) reqe = 0;
818	}
819
820	if (req)
821	break;
822
823	pthread_cond_wait (&reqwait, &reqlock);
824	}
825
826	pthread_mutex_unlock (&reqlock);
827
828	errno = 0; /* strictly unnecessary */
829	type = req->type; /* remember type for QUIT check */
830
831	if (!(req->flags & FLAG_CANCELLED))
832	switch (type)
833	{
834	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
835	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
836
837	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
838	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
839
840	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
841	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
842	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
843
844	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
845	case REQ_CLOSE: req->result = close (req->fd); break;
846	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
847	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
848	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
849	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
850	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
851
852	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
853	case REQ_FSYNC: req->result = fsync (req->fd); break;
854	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
855
856	case REQ_SLEEP:
857	{
858	struct timeval tv;
859
860	tv.tv_sec = req->fd;
861	tv.tv_usec = req->fd2;
862
863	req->result = select (0, 0, 0, 0, &tv);
864	}
865
866	case REQ_GROUP:
867	case REQ_NOP:
868	case REQ_QUIT:
869	break;
870
871	default:
872	req->result = ENOSYS;
873	break;
874	}
875
876	req->errorno = errno;
877
878	pthread_mutex_lock (&reslock);
879
880	req->next = 0;
881
882	if (rese)
883	{
884	rese->next = req;
885	rese = req;
886	}
887	else
888	{
889	rese = ress = req;
890
891	/* write a dummy byte to the pipe so fh becomes ready */
892	write (respipe [1], &respipe, 1);
893	}
894
895	pthread_mutex_unlock (&reslock);
896	}
897	while (type != REQ_QUIT);
898
899	return 0;
900	}
901
902	/*****************************************************************************/
903
904	static void atfork_prepare (void)
905	{
906	pthread_mutex_lock (&reqlock);
907	pthread_mutex_lock (&reslock);
908	#if !HAVE_PREADWRITE
909	pthread_mutex_lock (&preadwritelock);
910	#endif
911	#if !HAVE_READDIR_R
912	pthread_mutex_lock (&readdirlock);
913	#endif
914	}
915
916	static void atfork_parent (void)
917	{
918	#if !HAVE_READDIR_R
919	pthread_mutex_unlock (&readdirlock);
920	#endif
921	#if !HAVE_PREADWRITE
922	pthread_mutex_unlock (&preadwritelock);
923	#endif
924	pthread_mutex_unlock (&reslock);
925	pthread_mutex_unlock (&reqlock);
926	}	485	}
927		486
928	static void atfork_child (void)	487	static void atfork_child (void)
929	{	488	{
930	aio_req prv;
931
932	started = 0;
933
934	while (reqs)
935	{
936	prv = reqs;
937	reqs = prv->next;
938	req_free (prv);
939	}
940
941	reqs = reqe = 0;
942
943	while (ress)
944	{
945	prv = ress;
946	ress = prv->next;
947	req_free (prv);
948	}
949
950	ress = rese = 0;
951
952	close (respipe [0]);
953	close (respipe [1]);
954	create_pipe ();	489	create_respipe ();
		490	}
955		491
956	atfork_parent ();	492	static SV *
		493	get_cb (SV *cb_sv)
		494	{
		495	SvGETMAGIC (cb_sv);
		496	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
957	}	497	}
958		498
959	#define dREQ \	499	#define dREQ \
		500	SV *cb_cv; \
960	aio_req req; \	501	aio_req req; \
961	int req_pri = next_pri; \	502	int req_pri = next_pri; \
962	next_pri = DEFAULT_PRI + PRI_BIAS; \	503	next_pri = EIO_PRI_DEFAULT; \
963	\	504	\
964	if (SvOK (callback) && !SvROK (callback)) \	505	cb_cv = get_cb (callback); \
965	croak ("callback must be undef or of reference type"); \
966	\	506	\
967	Newz (0, req, 1, aio_cb); \	507	Newz (0, req, 1, eio_req); \
968	if (!req) \	508	if (!req) \
969	croak ("out of memory during aio_req allocation"); \	509	croak ("out of memory during eio_req allocation"); \
970	\	510	\
971	req->callback = newSVsv (callback); \	511	req->callback = SvREFCNT_inc (cb_cv); \
972	req->pri = req_pri	512	req->pri = req_pri
973		513
974	#define REQ_SEND \	514	#define REQ_SEND \
		515	PUTBACK; \
975	req_send (req); \	516	req_submit (req); \
		517	SPAGAIN; \
976	\	518	\
977	if (GIMME_V != G_VOID) \	519	if (GIMME_V != G_VOID) \
978	XPUSHs (req_sv (req, AIO_REQ_KLASS));	520	XPUSHs (req_sv (req, aio_req_stash));
979		521
980	MODULE = IO::AIO PACKAGE = IO::AIO	522	MODULE = IO::AIO PACKAGE = IO::AIO
981		523
982	PROTOTYPES: ENABLE	524	PROTOTYPES: ENABLE
983		525
984	BOOT:	526	BOOT:
985	{	527	{
		528	static const struct {
		529	const char *name;
		530	IV iv;
		531	} *civ, const_iv[] = {
		532	# define const_iv(name, value) { # name, (IV) value },
		533	# define const_eio(name) { # name, (IV) EIO_ ## name },
		534	const_iv (EXDEV , EXDEV)
		535	const_iv (ENOSYS , ENOSYS)
		536	const_iv (O_RDONLY, O_RDONLY)
		537	const_iv (O_WRONLY, O_WRONLY)
		538	const_iv (O_CREAT , O_CREAT)
		539	const_iv (O_TRUNC , O_TRUNC)
		540	#ifndef _WIN32
		541	const_iv (S_IFIFO , S_IFIFO)
		542	#endif
		543	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		544	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		545	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		546	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		547	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		548	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		549
		550	const_eio (MS_ASYNC)
		551	const_eio (MS_INVALIDATE)
		552	const_eio (MS_SYNC)
		553
		554	const_eio (MT_MODIFY)
		555
		556	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		557	const_eio (SYNC_FILE_RANGE_WRITE)
		558	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		559
		560	const_eio (READDIR_DENTS)
		561	const_eio (READDIR_DIRS_FIRST)
		562	const_eio (READDIR_STAT_ORDER)
		563	const_eio (READDIR_FOUND_UNKNOWN)
		564
		565	const_eio (DT_UNKNOWN)
		566	const_eio (DT_FIFO)
		567	const_eio (DT_CHR)
		568	const_eio (DT_DIR)
		569	const_eio (DT_BLK)
		570	const_eio (DT_REG)
		571	const_eio (DT_LNK)
		572	const_eio (DT_SOCK)
		573	const_eio (DT_WHT)
		574	};
		575
986	HV *stash = gv_stashpv ("IO::AIO", 1);	576	aio_stash = gv_stashpv ("IO::AIO" , 1);
987	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	577	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
988	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	578	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
989	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
990		579
		580	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		581	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		582
991	create_pipe ();	583	create_respipe ();
992	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
993	}
994		584
		585	if (eio_init (want_poll, done_poll) < 0)
		586	croak ("IO::AIO: unable to initialise eio library");
		587
		588	/* atfork child called in fifo order, so before eio's handler */
		589	X_THREAD_ATFORK (0, 0, atfork_child);
		590	}
		591
995	void	592	void
996	min_parallel (nthreads)	593	max_poll_reqs (int nreqs)
997	int nthreads
998	PROTOTYPE: $	594	PROTOTYPE: $
		595	CODE:
		596	eio_set_max_poll_reqs (nreqs);
999		597
1000	void	598	void
1001	max_parallel (nthreads)	599	max_poll_time (double nseconds)
1002	int nthreads
1003	PROTOTYPE: $	600	PROTOTYPE: $
1004
1005	int
1006	max_outstanding (nreqs)
1007	int nreqs
1008	PROTOTYPE: $
1009	CODE:	601	CODE:
1010	RETVAL = max_outstanding;	602	eio_set_max_poll_time (nseconds);
		603
		604	void
		605	min_parallel (int nthreads)
		606	PROTOTYPE: $
		607	CODE:
		608	eio_set_min_parallel (nthreads);
		609
		610	void
		611	max_parallel (int nthreads)
		612	PROTOTYPE: $
		613	CODE:
		614	eio_set_max_parallel (nthreads);
		615
		616	void
		617	max_idle (int nthreads)
		618	PROTOTYPE: $
		619	CODE:
		620	eio_set_max_idle (nthreads);
		621
		622	void
		623	max_outstanding (int maxreqs)
		624	PROTOTYPE: $
		625	CODE:
1011	max_outstanding = nreqs;	626	max_outstanding = maxreqs;
1012		627
1013	void	628	void
1014	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	629	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
1015	SV * pathname
1016	int flags
1017	int mode
1018	SV * callback
1019	PROTOTYPE: $$$;$	630	PROTOTYPE: $$$;$
1020	PPCODE:	631	PPCODE:
1021	{	632	{
1022	dREQ;	633	dREQ;
1023		634
1024	req->type = REQ_OPEN;	635	req->type = EIO_OPEN;
1025	req->data = newSVsv (pathname);	636	req->sv1 = newSVsv (pathname);
1026	req->dataptr = SvPVbyte_nolen (req->data);	637	req->ptr1 = SvPVbyte_nolen (req->sv1);
1027	req->fd = flags;	638	req->int1 = flags;
1028	req->mode = mode;	639	req->int2 = mode;
1029		640
1030	REQ_SEND;	641	REQ_SEND;
1031	}	642	}
1032		643
1033	void	644	void
1034	aio_close (fh,callback=&PL_sv_undef)	645	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
1035	SV * fh
1036	SV * callback
1037	PROTOTYPE: $;$	646	PROTOTYPE: $;$
1038	ALIAS:	647	ALIAS:
1039	aio_close = REQ_CLOSE
1040	aio_fsync = REQ_FSYNC	648	aio_fsync = EIO_FSYNC
1041	aio_fdatasync = REQ_FDATASYNC	649	aio_fdatasync = EIO_FDATASYNC
1042	PPCODE:	650	PPCODE:
1043	{	651	{
		652	int fd = s_fileno_croak (fh, 0);
1044	dREQ;	653	dREQ;
1045		654
1046	req->type = ix;	655	req->type = ix;
1047	req->fh = newSVsv (fh);	656	req->sv1 = newSVsv (fh);
1048	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	657	req->int1 = fd;
1049		658
1050	REQ_SEND (req);	659	REQ_SEND (req);
1051	}	660	}
1052		661
1053	void	662	void
		663	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		664	PROTOTYPE: $$$$;$
		665	PPCODE:
		666	{
		667	int fd = s_fileno_croak (fh, 0);
		668	dREQ;
		669
		670	req->type = EIO_SYNC_FILE_RANGE;
		671	req->sv1 = newSVsv (fh);
		672	req->int1 = fd;
		673	req->offs = offset;
		674	req->size = nbytes;
		675	req->int2 = flags;
		676
		677	REQ_SEND (req);
		678	}
		679
		680	void
		681	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		682	PROTOTYPE: $;$
		683	PPCODE:
		684	{
		685	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		686	int fd = s_fileno_croak (fh, 0);
		687	dREQ;
		688
		689	if (close_pipe < 0)
		690	{
		691	int pipefd [2];
		692
		693	if (pipe (pipefd) < 0
		694	|| close (pipefd [1]) < 0
		695	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		696	abort (); /*D*/
		697
		698	close_pipe = pipefd [0];
		699	}
		700
		701	req->type = EIO_DUP2;
		702	req->int1 = close_pipe;
		703	req->sv2 = newSVsv (fh);
		704	req->int2 = fd;
		705
		706	REQ_SEND (req);
		707	}
		708
		709	void
1054	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	710	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1055	SV * fh
1056	UV offset
1057	UV length
1058	SV * data
1059	UV dataoffset
1060	SV * callback
1061	ALIAS:	711	ALIAS:
1062	aio_read = REQ_READ	712	aio_read = EIO_READ
1063	aio_write = REQ_WRITE	713	aio_write = EIO_WRITE
1064	PROTOTYPE: $$$$$;$	714	PROTOTYPE: $$$$$;$
1065	PPCODE:	715	PPCODE:
1066	{	716	{
1067	aio_req req;
1068	STRLEN svlen;	717	STRLEN svlen;
		718	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1069	char *svptr = SvPVbyte (data, svlen);	719	char *svptr = SvPVbyte (data, svlen);
1070		720	UV len = SvUV (length);
1071	SvUPGRADE (data, SVt_PV);
1072	SvPOK_on (data);
1073		721
1074	if (dataoffset < 0)	722	if (dataoffset < 0)
1075	dataoffset += svlen;	723	dataoffset += svlen;
1076		724
1077	if (dataoffset < 0 || dataoffset > svlen)	725	if (dataoffset < 0 || dataoffset > svlen)
1078	croak ("data offset outside of string");	726	croak ("dataoffset outside of data scalar");
1079		727
1080	if (ix == REQ_WRITE)	728	if (ix == EIO_WRITE)
1081	{	729	{
1082	/* write: check length and adjust. */	730	/* write: check length and adjust. */
1083	if (length < 0 || length + dataoffset > svlen)	731	if (!SvOK (length) || len + dataoffset > svlen)
1084	length = svlen - dataoffset;	732	len = svlen - dataoffset;
1085	}	733	}
1086	else	734	else
1087	{	735	{
1088	/* read: grow scalar as necessary */	736	/* read: check type and grow scalar as necessary */
		737	SvUPGRADE (data, SVt_PV);
1089	svptr = SvGROW (data, length + dataoffset);	738	svptr = SvGROW (data, len + dataoffset + 1);
1090	}	739	}
1091
1092	if (length < 0)
1093	croak ("length must not be negative");
1094		740
1095	{	741	{
1096	dREQ;	742	dREQ;
1097		743
1098	req->type = ix;	744	req->type = ix;
1099	req->fh = newSVsv (fh);	745	req->sv1 = newSVsv (fh);
1100	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	746	req->int1 = fd;
1101	: IoOFP (sv_2io (fh)));	747	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1102	req->offset = offset;	748	req->size = len;
1103	req->length = length;
1104	req->data = SvREFCNT_inc (data);	749	req->sv2 = SvREFCNT_inc (data);
1105	req->dataptr = (char *)svptr + dataoffset;	750	req->ptr2 = (char *)svptr + dataoffset;
		751	req->stroffset = dataoffset;
1106		752
1107	if (!SvREADONLY (data))	753	if (!SvREADONLY (data))
1108	{	754	{
1109	SvREADONLY_on (data);	755	SvREADONLY_on (data);
1110	req->data2ptr = (void *)data;	756	req->flags |= FLAG_SV2_RO_OFF;
1111	}	757	}
1112		758
1113	REQ_SEND;	759	REQ_SEND;
1114	}	760	}
1115	}	761	}
1116		762
1117	void	763	void
		764	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		765	PROTOTYPE: $$;$
		766	PPCODE:
		767	{
		768	SV *data;
		769	dREQ;
		770
		771	req->type = EIO_READLINK;
		772	req->sv1 = newSVsv (path);
		773	req->ptr1 = SvPVbyte_nolen (req->sv1);
		774
		775	REQ_SEND;
		776	}
		777
		778	void
1118	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	779	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1119	SV * out_fh
1120	SV * in_fh
1121	UV in_offset
1122	UV length
1123	SV * callback
1124	PROTOTYPE: $$$$;$	780	PROTOTYPE: $$$$;$
1125	PPCODE:	781	PPCODE:
1126	{	782	{
		783	int ifd = s_fileno_croak (in_fh , 0);
		784	int ofd = s_fileno_croak (out_fh, 1);
1127	dREQ;	785	dREQ;
1128		786
1129	req->type = REQ_SENDFILE;	787	req->type = EIO_SENDFILE;
1130	req->fh = newSVsv (out_fh);	788	req->sv1 = newSVsv (out_fh);
1131	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	789	req->int1 = ofd;
1132	req->fh2 = newSVsv (in_fh);	790	req->sv2 = newSVsv (in_fh);
1133	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	791	req->int2 = ifd;
1134	req->offset = in_offset;	792	req->offs = in_offset;
1135	req->length = length;	793	req->size = length;
1136		794
1137	REQ_SEND;	795	REQ_SEND;
1138	}	796	}
1139		797
1140	void	798	void
1141	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	799	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1142	SV * fh
1143	UV offset
1144	IV length
1145	SV * callback
1146	PROTOTYPE: $$$;$	800	PROTOTYPE: $$$;$
1147	PPCODE:	801	PPCODE:
1148	{	802	{
		803	int fd = s_fileno_croak (fh, 0);
1149	dREQ;	804	dREQ;
1150		805
1151	req->type = REQ_READAHEAD;	806	req->type = EIO_READAHEAD;
1152	req->fh = newSVsv (fh);	807	req->sv1 = newSVsv (fh);
1153	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	808	req->int1 = fd;
1154	req->offset = offset;	809	req->offs = offset;
1155	req->length = length;	810	req->size = length;
1156		811
1157	REQ_SEND;	812	REQ_SEND;
1158	}	813	}
1159		814
1160	void	815	void
1161	aio_stat (fh_or_path,callback=&PL_sv_undef)	816	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1162	SV * fh_or_path
1163	SV * callback
1164	ALIAS:	817	ALIAS:
1165	aio_stat = REQ_STAT	818	aio_stat = EIO_STAT
1166	aio_lstat = REQ_LSTAT	819	aio_lstat = EIO_LSTAT
1167	PPCODE:	820	PPCODE:
1168	{	821	{
1169	dREQ;	822	dREQ;
1170		823
1171	New (0, req->statdata, 1, Stat_t);	824	req->sv1 = newSVsv (fh_or_path);
1172	if (!req->statdata)
1173	{
1174	req_free (req);
1175	croak ("out of memory during aio_req->statdata allocation");
1176	}
1177		825
1178	if (SvPOK (fh_or_path))	826	if (SvPOK (req->sv1))
1179	{	827	{
1180	req->type = ix;	828	req->type = ix;
1181	req->data = newSVsv (fh_or_path);
1182	req->dataptr = SvPVbyte_nolen (req->data);	829	req->ptr1 = SvPVbyte_nolen (req->sv1);
1183	}	830	}
1184	else	831	else
1185	{	832	{
1186	req->type = REQ_FSTAT;	833	req->type = EIO_FSTAT;
1187	req->fh = newSVsv (fh_or_path);
1188	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	834	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1189	}	835	}
1190		836
1191	REQ_SEND;	837	REQ_SEND;
1192	}	838	}
1193		839
1194	void	840	void
		841	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		842	PPCODE:
		843	{
		844	dREQ;
		845
		846	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		847	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		848	req->sv1 = newSVsv (fh_or_path);
		849
		850	if (SvPOK (req->sv1))
		851	{
		852	req->type = EIO_UTIME;
		853	req->ptr1 = SvPVbyte_nolen (req->sv1);
		854	}
		855	else
		856	{
		857	req->type = EIO_FUTIME;
		858	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		859	}
		860
		861	REQ_SEND;
		862	}
		863
		864	void
		865	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		866	PPCODE:
		867	{
		868	dREQ;
		869
		870	req->sv1 = newSVsv (fh_or_path);
		871	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		872
		873	if (SvPOK (req->sv1))
		874	{
		875	req->type = EIO_TRUNCATE;
		876	req->ptr1 = SvPVbyte_nolen (req->sv1);
		877	}
		878	else
		879	{
		880	req->type = EIO_FTRUNCATE;
		881	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		882	}
		883
		884	REQ_SEND;
		885	}
		886
		887	void
		888	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		889	ALIAS:
		890	aio_chmod = EIO_CHMOD
		891	aio_mkdir = EIO_MKDIR
		892	PPCODE:
		893	{
		894	dREQ;
		895
		896	req->int2 = mode;
		897	req->sv1 = newSVsv (fh_or_path);
		898
		899	if (SvPOK (req->sv1))
		900	{
		901	req->type = ix;
		902	req->ptr1 = SvPVbyte_nolen (req->sv1);
		903	}
		904	else
		905	{
		906	req->type = EIO_FCHMOD;
		907	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		908	}
		909
		910	REQ_SEND;
		911	}
		912
		913	void
		914	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		915	PPCODE:
		916	{
		917	dREQ;
		918
		919	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		920	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		921	req->sv1 = newSVsv (fh_or_path);
		922
		923	if (SvPOK (req->sv1))
		924	{
		925	req->type = EIO_CHOWN;
		926	req->ptr1 = SvPVbyte_nolen (req->sv1);
		927	}
		928	else
		929	{
		930	req->type = EIO_FCHOWN;
		931	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		932	}
		933
		934	REQ_SEND;
		935	}
		936
		937	void
		938	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		939	PPCODE:
		940	{
		941	dREQ;
		942
		943	req->type = EIO_READDIR;
		944	req->sv1 = newSVsv (pathname);
		945	req->ptr1 = SvPVbyte_nolen (req->sv1);
		946	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		947
		948	if (flags & EIO_READDIR_DENTS)
		949	req->int1 |= EIO_READDIR_CUSTOM2;
		950
		951	REQ_SEND;
		952	}
		953
		954	void
1195	aio_unlink (pathname,callback=&PL_sv_undef)	955	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1196	SV * pathname
1197	SV * callback
1198	ALIAS:	956	ALIAS:
1199	aio_unlink = REQ_UNLINK	957	aio_unlink = EIO_UNLINK
1200	aio_rmdir = REQ_RMDIR	958	aio_rmdir = EIO_RMDIR
1201	aio_readdir = REQ_READDIR	959	aio_readdir = EIO_READDIR
1202	PPCODE:	960	PPCODE:
1203	{	961	{
1204	dREQ;	962	dREQ;
1205		963
1206	req->type = ix;	964	req->type = ix;
1207	req->data = newSVsv (pathname);	965	req->sv1 = newSVsv (pathname);
1208	req->dataptr = SvPVbyte_nolen (req->data);	966	req->ptr1 = SvPVbyte_nolen (req->sv1);
		967
		968	REQ_SEND;
		969	}
		970
		971	void
		972	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		973	ALIAS:
		974	aio_link = EIO_LINK
		975	aio_symlink = EIO_SYMLINK
		976	aio_rename = EIO_RENAME
		977	PPCODE:
		978	{
		979	dREQ;
		980
		981	req->type = ix;
		982	req->sv1 = newSVsv (oldpath);
		983	req->ptr1 = SvPVbyte_nolen (req->sv1);
		984	req->sv2 = newSVsv (newpath);
		985	req->ptr2 = SvPVbyte_nolen (req->sv2);
1209		986
1210	REQ_SEND;	987	REQ_SEND;
1211	}	988	}
1212		989
1213	void	990	void
1214	aio_link (oldpath,newpath,callback=&PL_sv_undef)	991	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1215	SV * oldpath
1216	SV * newpath
1217	SV * callback
1218	ALIAS:
1219	aio_link = REQ_LINK
1220	aio_symlink = REQ_SYMLINK
1221	aio_rename = REQ_RENAME
1222	PPCODE:	992	PPCODE:
1223	{	993	{
1224	dREQ;	994	dREQ;
1225		995
1226	req->type = ix;	996	req->type = EIO_MKNOD;
1227	req->fh = newSVsv (oldpath);	997	req->sv1 = newSVsv (pathname);
1228	req->data2ptr = SvPVbyte_nolen (req->fh);	998	req->ptr1 = SvPVbyte_nolen (req->sv1);
1229	req->data = newSVsv (newpath);	999	req->int2 = (mode_t)mode;
1230	req->dataptr = SvPVbyte_nolen (req->data);	1000	req->offs = dev;
1231		1001
1232	REQ_SEND;	1002	REQ_SEND;
1233	}	1003	}
1234		1004
1235	void	1005	void
		1006	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1007	ALIAS:
		1008	aio_mtouch = EIO_MTOUCH
		1009	aio_msync = EIO_MSYNC
		1010	PROTOTYPE: $$$$;$
		1011	PPCODE:
		1012	{
		1013	STRLEN svlen;
		1014	UV len = SvUV (length);
		1015	char *svptr = SvPVbyte (data, svlen);
		1016
		1017	if (offset < 0)
		1018	offset += svlen;
		1019
		1020	if (offset < 0 || offset > svlen)
		1021	croak ("offset outside of scalar");
		1022
		1023	if (!SvOK (length) || len + offset > svlen)
		1024	len = svlen - offset;
		1025
		1026	{
		1027	dREQ;
		1028
		1029	req->type = ix;
		1030	req->size = len;
		1031	req->sv2 = SvREFCNT_inc (data);
		1032	req->ptr2 = (char *)svptr + offset;
		1033	req->int1 = flags;
		1034
		1035	REQ_SEND;
		1036	}
		1037	}
		1038
		1039	void
1236	aio_sleep (delay,callback=&PL_sv_undef)	1040	aio_busy (double delay, SV *callback=&PL_sv_undef)
1237	double delay
1238	SV * callback
1239	PPCODE:	1041	PPCODE:
1240	{	1042	{
1241	dREQ;	1043	dREQ;
1242		1044
1243	req->type = REQ_SLEEP;	1045	req->type = EIO_BUSY;
1244	req->fd = delay < 0. ? 0 : delay;	1046	req->nv1 = delay < 0. ? 0. : delay;
1245	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);
1246		1047
1247	REQ_SEND;	1048	REQ_SEND;
1248	}	1049	}
1249		1050
1250	void	1051	void
1251	aio_group (callback=&PL_sv_undef)	1052	aio_group (SV *callback=&PL_sv_undef)
1252	SV * callback
1253	PROTOTYPE: ;$	1053	PROTOTYPE: ;$
1254	PPCODE:	1054	PPCODE:
1255	{	1055	{
1256	dREQ;	1056	dREQ;
1257		1057
1258	req->type = REQ_GROUP;	1058	req->type = EIO_GROUP;
		1059
1259	req_send (req);	1060	req_submit (req);
1260
1261	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1061	XPUSHs (req_sv (req, aio_grp_stash));
1262	}	1062	}
1263		1063
1264	void	1064	void
1265	aio_nop (callback=&PL_sv_undef)	1065	aio_nop (SV *callback=&PL_sv_undef)
1266	SV * callback	1066	ALIAS:
		1067	aio_nop = EIO_NOP
		1068	aio_sync = EIO_SYNC
1267	PPCODE:	1069	PPCODE:
1268	{	1070	{
1269	dREQ;	1071	dREQ;
1270		1072
1271	req->type = REQ_NOP;	1073	req->type = ix;
1272		1074
1273	REQ_SEND;	1075	REQ_SEND;
1274	}	1076	}
1275		1077
1276	#if 0	1078	int
1277		1079	aioreq_pri (int pri = 0)
1278	void	1080	PROTOTYPE: ;$
1279	aio_pri (int pri = DEFAULT_PRI)
1280	CODE:	1081	CODE:
		1082	RETVAL = next_pri;
		1083	if (items > 0)
		1084	{
1281	if (pri < PRI_MIN) pri = PRI_MIN;	1085	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
1282	if (pri > PRI_MAX) pri = PRI_MAX;	1086	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
1283	next_pri = pri + PRI_BIAS;	1087	next_pri = pri;
		1088	}
		1089	OUTPUT:
		1090	RETVAL
1284		1091
1285	#endif	1092	void
		1093	aioreq_nice (int nice = 0)
		1094	CODE:
		1095	nice = next_pri - nice;
		1096	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1097	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1098	next_pri = nice;
1286		1099
1287	void	1100	void
1288	flush ()	1101	flush ()
1289	PROTOTYPE:	1102	PROTOTYPE:
1290	CODE:	1103	CODE:
1291	while (nreqs)	1104	while (eio_nreqs ())
1292	{	1105	{
1293	poll_wait ();	1106	poll_wait ();
1294	poll_cb ();	1107	poll_cb ();
1295	}	1108	}
1296		1109
1297	void	1110	int
1298	poll()	1111	poll()
1299	PROTOTYPE:	1112	PROTOTYPE:
1300	CODE:	1113	CODE:
1301	if (nreqs)
1302	{
1303	poll_wait ();	1114	poll_wait ();
1304	poll_cb ();	1115	RETVAL = poll_cb ();
1305	}	1116	OUTPUT:
		1117	RETVAL
1306		1118
1307	int	1119	int
1308	poll_fileno()	1120	poll_fileno()
1309	PROTOTYPE:	1121	PROTOTYPE:
1310	CODE:	1122	CODE:
1311	RETVAL = respipe [0];	1123	RETVAL = s_epipe_fd (&respipe);
1312	OUTPUT:	1124	OUTPUT:
1313	RETVAL	1125	RETVAL
1314		1126
1315	int	1127	int
1316	poll_cb(...)	1128	poll_cb(...)
…		…
1322		1134
1323	void	1135	void
1324	poll_wait()	1136	poll_wait()
1325	PROTOTYPE:	1137	PROTOTYPE:
1326	CODE:	1138	CODE:
1327	if (nreqs)
1328	poll_wait ();	1139	poll_wait ();
1329		1140
1330	int	1141	int
1331	nreqs()	1142	nreqs()
1332	PROTOTYPE:	1143	PROTOTYPE:
1333	CODE:	1144	CODE:
1334	RETVAL = nreqs;	1145	RETVAL = eio_nreqs ();
1335	OUTPUT:	1146	OUTPUT:
1336	RETVAL	1147	RETVAL
1337		1148
		1149	int
		1150	nready()
		1151	PROTOTYPE:
		1152	CODE:
		1153	RETVAL = eio_nready ();
		1154	OUTPUT:
		1155	RETVAL
		1156
		1157	int
		1158	npending()
		1159	PROTOTYPE:
		1160	CODE:
		1161	RETVAL = eio_npending ();
		1162	OUTPUT:
		1163	RETVAL
		1164
		1165	int
		1166	nthreads()
		1167	PROTOTYPE:
		1168	CODE:
		1169	RETVAL = eio_nthreads ();
		1170	OUTPUT:
		1171	RETVAL
		1172
		1173	int
		1174	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1175	PROTOTYPE: $$$$
		1176	CODE:
		1177	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1178	RETVAL = posix_fadvise (fh, offset, length, advice);
		1179	#else
		1180	RETVAL = errno = ENOSYS;
		1181	#endif
		1182	OUTPUT:
		1183	RETVAL
		1184
		1185	ssize_t
		1186	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1187	PROTOTYPE: $$$$
		1188	CODE:
		1189	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1190	OUTPUT:
		1191	RETVAL
		1192
		1193	void _on_next_submit (SV *cb)
		1194	CODE:
		1195	SvREFCNT_dec (on_next_submit);
		1196	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1197
1338	PROTOTYPES: DISABLE	1198	PROTOTYPES: DISABLE
1339		1199
1340	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1200	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1341		1201
1342	void	1202	void
1343	cancel (aio_req_ornot req)	1203	cancel (aio_req_ornot req)
1344	PROTOTYPE:
1345	CODE:	1204	CODE:
1346	req_cancel (req);	1205	eio_cancel (req);
1347		1206
1348	void	1207	void
1349	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)	1208	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1350	CODE:	1209	PPCODE:
		1210	{
		1211	if (GIMME_V != G_VOID)
		1212	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1213
		1214	if (items > 1)
		1215	{
		1216	SV *cb_cv =get_cb (callback);
		1217
1351	SvREFCNT_dec (req->callback);	1218	SvREFCNT_dec (req->callback);
1352	req->callback = newSVsv (callback);	1219	req->callback = SvREFCNT_inc (cb_cv);
		1220	}
		1221	}
1353		1222
1354	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1223	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1355		1224
1356	void	1225	void
1357	add (aio_req grp, ...)	1226	add (aio_req grp, ...)
1358	PPCODE:	1227	PPCODE:
1359	{	1228	{
1360	int i;	1229	int i;
1361	aio_req req;
1362		1230
1363	if (grp->fd == 2)	1231	if (grp->int1 == 2)
1364	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1232	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1365		1233
1366	for (i = 1; i < items; ++i )	1234	for (i = 1; i < items; ++i )
1367	{	1235	{
		1236	aio_req req;
		1237
1368	if (GIMME_V != G_VOID)	1238	if (GIMME_V != G_VOID)
1369	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1239	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1370		1240
1371	req = SvAIO_REQ (ST (i));	1241	req = SvAIO_REQ (ST (i));
1372		1242
1373	if (req)	1243	if (req)
1374	{	1244	eio_grp_add (grp, req);
1375	++grp->length;
1376	req->grp = grp;
1377
1378	req->grp_prev = 0;
1379	req->grp_next = grp->grp_first;
1380
1381	if (grp->grp_first)
1382	grp->grp_first->grp_prev = req;
1383
1384	grp->grp_first = req;
1385	}	1245	}
1386	}
1387	}	1246	}
		1247
		1248	void
		1249	cancel_subs (aio_req_ornot req)
		1250	CODE:
		1251	req_cancel_subs (req);
1388		1252
1389	void	1253	void
1390	result (aio_req grp, ...)	1254	result (aio_req grp, ...)
1391	CODE:	1255	CODE:
1392	{	1256	{
1393	int i;	1257	int i;
		1258	AV *av;
		1259
		1260	grp->errorno = errno;
		1261
1394	AV *av = newAV ();	1262	av = newAV ();
		1263	av_extend (av, items - 1);
1395		1264
1396	for (i = 1; i < items; ++i )	1265	for (i = 1; i < items; ++i )
1397	av_push (av, newSVsv (ST (i)));	1266	av_push (av, newSVsv (ST (i)));
1398		1267
1399	SvREFCNT_dec (grp->data);	1268	SvREFCNT_dec (grp->sv1);
1400	grp->data = (SV *)av;	1269	grp->sv1 = (SV *)av;
1401	}	1270	}
1402		1271
1403	void	1272	void
		1273	errno (aio_req grp, int errorno = errno)
		1274	CODE:
		1275	grp->errorno = errorno;
		1276
		1277	void
1404	feed_limit (aio_req grp, int limit)	1278	limit (aio_req grp, int limit)
1405	CODE:	1279	CODE:
1406	grp->fd2 = limit;	1280	eio_grp_limit (grp, limit);
1407	aio_grp_feed (grp);
1408		1281
1409	void	1282	void
1410	feed (aio_req grp, SV *callback=&PL_sv_undef)	1283	feed (aio_req grp, SV *callback=&PL_sv_undef)
1411	CODE:	1284	CODE:
1412	{	1285	{
1413	SvREFCNT_dec (grp->fh2);	1286	SvREFCNT_dec (grp->sv2);
1414	grp->fh2 = newSVsv (callback);	1287	grp->sv2 = newSVsv (callback);
		1288	grp->feed = aio_grp_feed;
1415		1289
1416	if (grp->fd2 <= 0)	1290	if (grp->int2 <= 0)
1417	grp->fd2 = 2;	1291	grp->int2 = 2;
1418		1292
1419	aio_grp_feed (grp);	1293	eio_grp_limit (grp, grp->int2);
1420	}	1294	}
1421		1295

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