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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.6 by root, Mon Jul 11 01:03:17 2005 UTC vs.
Revision 1.155 by root, Fri Jul 17 00:56:54 2009 UTC

		1	#include "libeio/xthread.h"
		2
		3	#include <errno.h>
		4
1	#include "EXTERN.h"	5	#include "EXTERN.h"
2	#include "perl.h"	6	#include "perl.h"
3	#include "XSUB.h"	7	#include "XSUB.h"
4		8
		9	#include "schmorp.h"
		10
		11	#include <stddef.h>
		12	#include <stdlib.h>
		13	#include <errno.h>
5	#include <sys/types.h>	14	#include <sys/types.h>
6	#include <sys/stat.h>	15	#include <sys/stat.h>
7	#include <unistd.h>	16	#include <limits.h>
8	#include <fcntl.h>	17	#include <fcntl.h>
9	#include <signal.h>
10	#include <sched.h>	18	#include <sched.h>
11	#include <endian.h>
12		19
13	#include <pthread.h>	20	/* perl namespace pollution */
14	#include <sys/syscall.h>	21	#undef VERSION
15		22
16	typedef void *InputStream; /* hack, but 5.6.1 is simply toooo old ;) */	23	#ifdef _WIN32
17	typedef void *OutputStream; /* hack, but 5.6.1 is simply toooo old ;) */
18	typedef void *InOutStream; /* hack, but 5.6.1 is simply toooo old ;) */
19		24
20	#if __ia64	25	# define EIO_STRUCT_DIRENT Direntry_t
21	# define STACKSIZE 65536	26	# undef malloc
		27	# undef free
		28
		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
22	#else	61	#else
23	# define STACKSIZE 4096	62
		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
24	#endif	70	#endif
25		71
		72	/* perl stupidly overrides readdir and maybe others */
		73	/* with thread-unsafe versions, imagine that :( */
		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
		89	#endif
		90
		91	/*****************************************************************************/
		92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
		95	#else
		96	# define expect(expr,value) (expr)
		97	#endif
		98
		99	#define expect_false(expr) expect ((expr) != 0, 0)
		100	#define expect_true(expr) expect ((expr) != 0, 1)
		101
		102	/*****************************************************************************/
		103
		104	static HV *stash;
		105	typedef SV SV8; /* byte-sv, used for argument-checking */
		106	typedef int aio_rfd; /* read file desriptor */
		107	typedef int aio_wfd; /* write file descriptor */
		108
		109	#define AIO_REQ_KLASS "IO::AIO::REQ"
		110	#define AIO_GRP_KLASS "IO::AIO::GRP"
		111
		112	#define EIO_REQ_MEMBERS \
		113	SV *callback; \
		114	SV *sv1, *sv2; \
		115	STRLEN stroffset; \
		116	SV *self;
		117
		118	#define EIO_NO_WRAPPERS 1
		119
		120	#include "libeio/eio.h"
		121
		122	#ifndef POSIX_FADV_NORMAL
		123	# define POSIX_FADV_NORMAL 0
		124	# define NO_FADVISE 1
		125	#endif
		126
		127	#ifndef POSIX_FADV_SEQUENTIAL
		128	# define POSIX_FADV_SEQUENTIAL 0
		129	#endif
		130
		131	#ifndef POSIX_FADV_RANDOM
		132	# define POSIX_FADV_RANDOM 0
		133	#endif
		134
		135	#ifndef POSIX_FADV_NOREUSE
		136	# define POSIX_FADV_NOREUSE 0
		137	#endif
		138
		139	#ifndef POSIX_FADV_WILLNEED
		140	# define POSIX_FADV_WILLNEED 0
		141	#endif
		142
		143	#ifndef POSIX_FADV_DONTNEED
		144	# define POSIX_FADV_DONTNEED 0
		145	#endif
		146
		147	static int req_invoke (eio_req *req);
		148	#define EIO_FINISH(req) req_invoke (req)
		149	static void req_destroy (eio_req *grp);
		150	#define EIO_DESTROY(req) req_destroy (req)
		151
26	enum {	152	enum {
27	REQ_QUIT,	153	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
28	REQ_OPEN, REQ_CLOSE,
29	REQ_READ, REQ_WRITE, REQ_READAHEAD,
30	REQ_STAT, REQ_LSTAT, REQ_FSTAT, REQ_UNLINK,
31	REQ_FSYNC, REQ_FDATASYNC,
32	};	154	};
33		155
34	typedef struct aio_cb {	156	#include "libeio/eio.c"
35	struct aio_cb *volatile next;
36		157
37	int type;
38
39	int fd;
40	off_t offset;
41	size_t length;
42	ssize_t result;
43	mode_t mode; /* open */
44	int errorno;
45	SV *data, *callback;
46	void *dataptr;
47	STRLEN dataoffset;
48
49	Stat_t *statdata;
50	} aio_cb;
51
52	typedef aio_cb *aio_req;	158	typedef eio_req *aio_req;
		159	typedef eio_req *aio_req_ornot;
53		160
54	static int started;	161	static SV *on_next_submit;
55	static int nreqs;	162	static int next_pri = EIO_PRI_DEFAULT;
56	static int max_outstanding = 1<<30;	163	static int max_outstanding;
57	static int respipe [2];
58		164
59	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	165	static s_epipe respipe;
60	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
61	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
62		166
63	static volatile aio_req reqs, reqe; /* queue start, queue end */	167	static void req_destroy (aio_req req);
64	static volatile aio_req ress, rese; /* queue start, queue end */	168	static void req_cancel (aio_req req);
		169
		170	static void want_poll (void)
		171	{
		172	/* write a dummy byte to the pipe so fh becomes ready */
		173	s_epipe_signal (&respipe);
		174	}
		175
		176	static void done_poll (void)
		177	{
		178	/* read any signals sent by the worker threads */
		179	s_epipe_drain (&respipe);
		180	}
		181
		182	/* must be called at most once */
		183	static SV *req_sv (aio_req req, const char *klass)
		184	{
		185	if (!req->self)
		186	{
		187	req->self = (SV *)newHV ();
		188	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		189	}
		190
		191	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		192	}
		193
		194	static aio_req SvAIO_REQ (SV *sv)
		195	{
		196	MAGIC *mg;
		197
		198	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		199	croak ("object of class " AIO_REQ_KLASS " expected");
		200
		201	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		202
		203	return mg ? (aio_req)mg->mg_ptr : 0;
		204	}
		205
		206	static void aio_grp_feed (aio_req grp)
		207	{
		208	if (grp->sv2 && SvOK (grp->sv2))
		209	{
		210	dSP;
		211
		212	ENTER;
		213	SAVETMPS;
		214	PUSHMARK (SP);
		215	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		216	PUTBACK;
		217	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		218	SPAGAIN;
		219	FREETMPS;
		220	LEAVE;
		221	}
		222	}
		223
		224	static void req_submit (eio_req *req)
		225	{
		226	eio_submit (req);
		227
		228	if (expect_false (on_next_submit))
		229	{
		230	dSP;
		231	SV *cb = sv_2mortal (on_next_submit);
		232
		233	on_next_submit = 0;
		234
		235	PUSHMARK (SP);
		236	PUTBACK;
		237	call_sv (cb, G_DISCARD | G_EVAL);
		238	}
		239	}
		240
		241	static int req_invoke (eio_req *req)
		242	{
		243	dSP;
		244
		245	if (req->flags & FLAG_SV2_RO_OFF)
		246	SvREADONLY_off (req->sv2);
		247
		248	if (!EIO_CANCELLED (req) && req->callback)
		249	{
		250	ENTER;
		251	SAVETMPS;
		252	PUSHMARK (SP);
		253	EXTEND (SP, 1);
		254
		255	switch (req->type)
		256	{
		257	case EIO_READDIR:
		258	{
		259	SV *rv = &PL_sv_undef;
		260
		261	if (req->result >= 0)
		262	{
		263	int i;
		264	char *names = (char *)req->ptr2;
		265	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		266	AV *av = newAV ();
		267
		268	av_extend (av, req->result - 1);
		269
		270	for (i = 0; i < req->result; ++i)
		271	{
		272	if (req->int1 & EIO_READDIR_DENTS)
		273	{
		274	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		275
		276	if (req->int1 & EIO_READDIR_CUSTOM2)
		277	{
		278	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		279	AV *avent = newAV ();
		280
		281	av_extend (avent, 2);
		282
		283	if (!sv_type [ent->type])
		284	{
		285	sv_type [ent->type] = newSViv (ent->type);
		286	SvREADONLY_on (sv_type [ent->type]);
		287	}
		288
		289	av_store (avent, 0, namesv);
		290	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		291	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		292
		293	av_store (av, i, newRV_noinc ((SV *)avent));
		294	}
		295	else
		296	av_store (av, i, namesv);
		297
		298	++ent;
		299	}
		300	else
		301	{
		302	SV *name = newSVpv (names, 0);
		303	av_store (av, i, name);
		304	names += SvCUR (name) + 1;
		305	}
		306	}
		307
		308	rv = sv_2mortal (newRV_noinc ((SV *)av));
		309	}
		310
		311	PUSHs (rv);
		312
		313	if (req->int1 & EIO_READDIR_CUSTOM1)
		314	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		315	}
		316	break;
		317
		318	case EIO_OPEN:
		319	{
		320	/* convert fd to fh */
		321	SV *fh = &PL_sv_undef;
		322
		323	if (req->result >= 0)
		324	{
		325	GV *gv = (GV *)sv_newmortal ();
		326	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		327	char sym [64];
		328	int symlen;
		329
		330	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		331	gv_init (gv, stash, sym, symlen, 0);
		332
		333	symlen = snprintf (
		334	sym,
		335	sizeof (sym),
		336	"%s&=%d",
		337	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		338	(int)req->result
		339	);
		340
		341	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		342	fh = (SV *)gv;
		343	}
		344
		345	PUSHs (fh);
		346	}
		347	break;
		348
		349	case EIO_GROUP:
		350	req->int1 = 2; /* mark group as finished */
		351
		352	if (req->sv1)
		353	{
		354	int i;
		355	AV *av = (AV *)req->sv1;
		356
		357	EXTEND (SP, AvFILL (av) + 1);
		358	for (i = 0; i <= AvFILL (av); ++i)
		359	PUSHs (*av_fetch (av, i, 0));
		360	}
		361	break;
		362
		363	case EIO_NOP:
		364	case EIO_BUSY:
		365	break;
		366
		367	case EIO_READLINK:
		368	if (req->result > 0)
		369	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		370	break;
		371
		372	case EIO_STAT:
		373	case EIO_LSTAT:
		374	case EIO_FSTAT:
		375	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		376	PL_laststatval = req->result;
		377	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		378	PUSHs (sv_2mortal (newSViv (req->result)));
		379	break;
		380
		381	case EIO_READ:
		382	{
		383	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		384	*SvEND (req->sv2) = 0;
		385	SvPOK_only (req->sv2);
		386	SvSETMAGIC (req->sv2);
		387	PUSHs (sv_2mortal (newSViv (req->result)));
		388	}
		389	break;
		390
		391	case EIO_DUP2:
		392	if (req->result > 0)
		393	req->result = 0;
		394	/* FALLTHROUGH */
		395
		396	default:
		397	PUSHs (sv_2mortal (newSViv (req->result)));
		398	break;
		399	}
		400
		401	errno = req->errorno;
		402
		403	PUTBACK;
		404	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		405	SPAGAIN;
		406
		407	FREETMPS;
		408	LEAVE;
		409
		410	PUTBACK;
		411	}
		412
		413	return !!SvTRUE (ERRSV);
		414	}
		415
		416	static void req_destroy (aio_req req)
		417	{
		418	if (req->self)
		419	{
		420	sv_unmagic (req->self, PERL_MAGIC_ext);
		421	SvREFCNT_dec (req->self);
		422	}
		423
		424	SvREFCNT_dec (req->sv1);
		425	SvREFCNT_dec (req->sv2);
		426	SvREFCNT_dec (req->callback);
		427
		428	Safefree (req);
		429	}
		430
		431	static void req_cancel_subs (aio_req grp)
		432	{
		433	aio_req sub;
		434
		435	if (grp->type != EIO_GROUP)
		436	return;
		437
		438	SvREFCNT_dec (grp->sv2);
		439	grp->sv2 = 0;
		440
		441	eio_grp_cancel (grp);
		442	}
65		443
66	static void	444	static void
67	poll_wait ()	445	create_respipe (void)
68	{	446	{
69	if (!nreqs)	447	if (s_epipe_renew (&respipe))
		448	croak ("IO::AIO: unable to initialize result pipe");
		449	}
		450
		451	static void poll_wait (void)
		452	{
		453	while (eio_nreqs ())
		454	{
		455	int size;
		456
		457	X_LOCK (reslock);
		458	size = res_queue.size;
		459	X_UNLOCK (reslock);
		460
		461	if (size)
70	return;	462	return;
71		463
72	fd_set rfd;	464	etp_maybe_start_thread ();
73	FD_ZERO(&rfd);
74	FD_SET(respipe [0], &rfd);
75		465
76	select (respipe [0] + 1, &rfd, 0, 0, 0);	466	s_epipe_wait (&respipe);
77	}
78
79	static int
80	poll_cb ()
81	{
82	dSP;
83	int count = 0;
84	aio_req req;
85
86	{
87	/* read and signals sent by the worker threads */
88	char buf [32];
89	while (read (respipe [0], buf, 32) > 0)
90	;
91	}	467	}
		468	}
92		469
		470	static int poll_cb (void)
		471	{
93	for (;;)	472	for (;;)
94	{	473	{
95	pthread_mutex_lock (&reslock);	474	int res = eio_poll ();
96		475
97	req = ress;
98
99	if (ress)	476	if (res > 0)
100	{
101	ress = ress->next;
102	if (!ress) rese = 0;
103	}
104
105	pthread_mutex_unlock (&reslock);
106
107	if (!req)
108	break;	477	croak (0);
109		478
110	nreqs--;	479	if (!max_outstanding || max_outstanding > eio_nreqs ())
		480	return res;
111		481
112	if (req->type == REQ_QUIT)	482	poll_wait ();
113	started--;
114	else
115	{
116	int errorno = errno;
117	errno = req->errorno;
118
119	if (req->type == REQ_READ)
120	SvCUR_set (req->data, req->dataoffset
121	+ req->result > 0 ? req->result : 0);
122
123	if (req->data)
124	SvREFCNT_dec (req->data);
125
126	if (req->type == REQ_STAT || req->type == REQ_LSTAT || req->type == REQ_FSTAT)
127	{
128	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
129	PL_laststatval = req->result;
130	PL_statcache = *(req->statdata);
131
132	Safefree (req->statdata);
133	}
134
135	PUSHMARK (SP);
136	XPUSHs (sv_2mortal (newSViv (req->result)));
137
138	if (req->type == REQ_OPEN)
139	{
140	/* convert fd to fh */
141	SV *fh;
142
143	PUTBACK;
144	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
145	SPAGAIN;
146
147	fh = POPs;
148
149	PUSHMARK (SP);
150	XPUSHs (fh);
151	}
152
153	PUTBACK;
154	call_sv (req->callback, G_VOID | G_EVAL);
155	SPAGAIN;
156
157	if (req->callback)
158	SvREFCNT_dec (req->callback);
159
160	errno = errorno;
161	count++;
162	}
163
164	Safefree (req);
165	}	483	}
166
167	return count;
168	}	484	}
169		485
170	static void *aio_proc(void *arg);	486	static void atfork_child (void)
171
172	static void
173	start_thread (void)
174	{	487	{
175	sigset_t fullsigset, oldsigset;	488	create_respipe ();
176	pthread_t tid;
177	pthread_attr_t attr;
178
179	pthread_attr_init (&attr);
180	pthread_attr_setstacksize (&attr, STACKSIZE);
181	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
182
183	sigfillset (&fullsigset);
184	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
185
186	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
187	started++;
188
189	sigprocmask (SIG_SETMASK, &oldsigset, 0);
190	}	489	}
191		490
192	static void	491	static SV *
193	send_req (aio_req req)	492	get_cb (SV *cb_sv)
194	{	493	{
195	nreqs++;	494	SvGETMAGIC (cb_sv);
196		495	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
197	pthread_mutex_lock (&reqlock);
198
199	req->next = 0;
200
201	if (reqe)
202	{
203	reqe->next = req;
204	reqe = req;
205	}
206	else
207	reqe = reqs = req;
208
209	pthread_cond_signal (&reqwait);
210	pthread_mutex_unlock (&reqlock);
211
212	while (nreqs > max_outstanding)
213	{
214	poll_wait ();
215	poll_cb ();
216	}
217	}	496	}
218		497
219	static void	498	#define dREQ \
220	end_thread (void)	499	SV *cb_cv; \
221	{
222	aio_req req;	500	aio_req req; \
223	New (0, req, 1, aio_cb);	501	int req_pri = next_pri; \
224	req->type = REQ_QUIT;	502	next_pri = EIO_PRI_DEFAULT; \
225		503	\
226	send_req (req);	504	cb_cv = get_cb (callback); \
227	}	505	\
228
229	static void
230	read_write (int dowrite, int fd, off_t offset, size_t length,
231	SV *data, STRLEN dataoffset, SV *callback)
232	{
233	aio_req req;
234	STRLEN svlen;
235	char *svptr = SvPV (data, svlen);
236
237	SvUPGRADE (data, SVt_PV);
238	SvPOK_on (data);
239
240	if (dataoffset < 0)
241	dataoffset += svlen;
242
243	if (dataoffset < 0 || dataoffset > svlen)
244	croak ("data offset outside of string");
245
246	if (dowrite)
247	{
248	/* write: check length and adjust. */
249	if (length < 0 || length + dataoffset > svlen)
250	length = svlen - dataoffset;
251	}
252	else
253	{
254	/* read: grow scalar as necessary */
255	svptr = SvGROW (data, length + dataoffset);
256	}
257
258	if (length < 0)
259	croak ("length must not be negative");
260
261	Newz (0, req, 1, aio_cb);	506	Newz (0, req, 1, eio_req); \
262		507	if (!req) \
263	if (!req)
264	croak ("out of memory during aio_req allocation");	508	croak ("out of memory during eio_req allocation"); \
265		509	\
266	req->type = dowrite ? REQ_WRITE : REQ_READ;
267	req->fd = fd;
268	req->offset = offset;
269	req->length = length;
270	req->data = SvREFCNT_inc (data);
271	req->dataptr = (char *)svptr + dataoffset;
272	req->callback = SvREFCNT_inc (callback);	510	req->callback = SvREFCNT_inc (cb_cv); \
		511	req->pri = req_pri
273		512
274	send_req (req);	513	#define REQ_SEND \
275	}	514	PUTBACK; \
		515	req_submit (req); \
		516	SPAGAIN; \
		517	\
		518	if (GIMME_V != G_VOID) \
		519	XPUSHs (req_sv (req, AIO_REQ_KLASS));
276		520
277	static void *	521	MODULE = IO::AIO PACKAGE = IO::AIO
278	aio_proc (void *thr_arg)
279	{
280	aio_req req;
281	int type;
282		522
283	do	523	PROTOTYPES: ENABLE
284	{
285	pthread_mutex_lock (&reqlock);
286		524
287	for (;;)	525	BOOT:
288	{	526	{
289	req = reqs;	527	static const struct {
290		528	const char *name;
291	if (reqs)	529	IV iv;
292	{	530	} *civ, const_iv[] = {
293	reqs = reqs->next;	531	# define const_iv(name, value) { # name, (IV) value },
294	if (!reqs) reqe = 0;	532	# define const_eio(name) { # name, (IV) EIO_ ## name },
295	}	533	const_iv (EXDEV , EXDEV)
296		534	const_iv (ENOSYS , ENOSYS)
297	if (req)	535	const_iv (O_RDONLY, O_RDONLY)
298	break;	536	const_iv (O_WRONLY, O_WRONLY)
299		537	const_iv (O_CREAT , O_CREAT)
300	pthread_cond_wait (&reqwait, &reqlock);	538	const_iv (O_TRUNC , O_TRUNC)
301	}	539	#ifndef _WIN32
302		540	const_iv (S_IFIFO , S_IFIFO)
303	pthread_mutex_unlock (&reqlock);
304
305	errno = 0; /* strictly unnecessary */
306
307	type = req->type;
308
309	switch (type)
310	{
311	case REQ_READ: req->result = pread64 (req->fd, req->dataptr, req->length, req->offset); break;
312	case REQ_WRITE: req->result = pwrite64 (req->fd, req->dataptr, req->length, req->offset); break;
313	#if SYS_readahead
314	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
315	#else
316	case REQ_READAHEAD: req->result = -1; errno = ENOSYS; break;
317	#endif	541	#endif
		542	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		543	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		544	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		545	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		546	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		547	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
318		548
319	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;	549	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
320	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;	550	const_eio (SYNC_FILE_RANGE_WRITE)
321	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;	551	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
322		552
323	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;	553	const_eio (READDIR_DENTS)
324	case REQ_CLOSE: req->result = close (req->fd); break;	554	const_eio (READDIR_DIRS_FIRST)
325	case REQ_UNLINK: req->result = unlink (req->dataptr); break;	555	const_eio (READDIR_STAT_ORDER)
		556	const_eio (READDIR_FOUND_UNKNOWN)
326		557
327	case REQ_FSYNC: req->result = fsync (req->fd); break;	558	const_eio (DT_UNKNOWN)
328	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;	559	const_eio (DT_FIFO)
		560	const_eio (DT_CHR)
		561	const_eio (DT_DIR)
		562	const_eio (DT_BLK)
		563	const_eio (DT_REG)
		564	const_eio (DT_LNK)
		565	const_eio (DT_SOCK)
		566	const_eio (DT_WHT)
		567	};
329		568
330	case REQ_QUIT:	569	stash = gv_stashpv ("IO::AIO", 1);
331	break;
332		570
333	default:	571	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
334	req->result = ENOSYS;	572	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
335	break;
336	}
337		573
338	req->errorno = errno;	574	create_respipe ();
339		575
340	pthread_mutex_lock (&reslock);	576	if (eio_init (want_poll, done_poll) < 0)
		577	croak ("IO::AIO: unable to initialise eio library");
341		578
342	req->next = 0;	579	/* atfork child called in fifo order, so before eio's handler */
343		580	X_THREAD_ATFORK (0, 0, atfork_child);
344	if (rese)
345	{
346	rese->next = req;
347	rese = req;
348	}
349	else
350	{
351	rese = ress = req;
352
353	/* write a dummy byte to the pipe so fh becomes ready */
354	write (respipe [1], &respipe, 1);
355	}
356
357	pthread_mutex_unlock (&reslock);
358	}
359	while (type != REQ_QUIT);
360
361	return 0;
362	}	581	}
363		582
364	MODULE = IO::AIO PACKAGE = IO::AIO
365
366	BOOT:
367	{
368	if (pipe (respipe))
369	croak ("unable to initialize result pipe");
370
371	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
372	croak ("cannot set result pipe to nonblocking mode");
373
374	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
375	croak ("cannot set result pipe to nonblocking mode");
376	}
377
378	void	583	void
379	min_parallel(nthreads)	584	max_poll_reqs (int nreqs)
380	int nthreads
381	PROTOTYPE: $	585	PROTOTYPE: $
382	CODE:	586	CODE:
383	while (nthreads > started)	587	eio_set_max_poll_reqs (nreqs);
384	start_thread ();
385		588
386	void	589	void
387	max_parallel(nthreads)	590	max_poll_time (double nseconds)
388	int nthreads
389	PROTOTYPE: $	591	PROTOTYPE: $
390	CODE:	592	CODE:
		593	eio_set_max_poll_time (nseconds);
		594
		595	void
		596	min_parallel (int nthreads)
		597	PROTOTYPE: $
		598	CODE:
		599	eio_set_min_parallel (nthreads);
		600
		601	void
		602	max_parallel (int nthreads)
		603	PROTOTYPE: $
		604	CODE:
		605	eio_set_max_parallel (nthreads);
		606
		607	void
		608	max_idle (int nthreads)
		609	PROTOTYPE: $
		610	CODE:
		611	eio_set_max_idle (nthreads);
		612
		613	void
		614	max_outstanding (int maxreqs)
		615	PROTOTYPE: $
		616	CODE:
		617	max_outstanding = maxreqs;
		618
		619	void
		620	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
		621	PROTOTYPE: $$$;$
		622	PPCODE:
391	{	623	{
392	int cur = started;	624	dREQ;
393	while (cur > nthreads)	625
394	{	626	req->type = EIO_OPEN;
395	end_thread ();	627	req->sv1 = newSVsv (pathname);
		628	req->ptr1 = SvPVbyte_nolen (req->sv1);
		629	req->int1 = flags;
		630	req->int2 = mode;
		631
		632	REQ_SEND;
		633	}
		634
		635	void
		636	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
		637	PROTOTYPE: $;$
		638	ALIAS:
		639	aio_fsync = EIO_FSYNC
		640	aio_fdatasync = EIO_FDATASYNC
		641	PPCODE:
		642	{
		643	int fd = s_fileno_croak (fh, 0);
		644	dREQ;
		645
		646	req->type = ix;
		647	req->sv1 = newSVsv (fh);
		648	req->int1 = fd;
		649
		650	REQ_SEND (req);
		651	}
		652
		653	void
		654	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		655	PROTOTYPE: $$$$;$
		656	PPCODE:
		657	{
		658	int fd = s_fileno_croak (fh, 0);
		659	dREQ;
		660
		661	req->type = EIO_SYNC_FILE_RANGE;
		662	req->sv1 = newSVsv (fh);
		663	req->int1 = fd;
		664	req->offs = offset;
		665	req->size = nbytes;
		666	req->int2 = flags;
		667
		668	REQ_SEND (req);
		669	}
		670
		671	void
		672	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		673	PROTOTYPE: $;$
		674	PPCODE:
		675	{
		676	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		677	int fd = s_fileno_croak (fh, 0);
		678	dREQ;
		679
		680	if (close_pipe < 0)
		681	{
		682	int pipefd [2];
		683
		684	if (pipe (pipefd) < 0
		685	|| close (pipefd [1]) < 0
		686	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		687	abort (); /*D*/
		688
		689	close_pipe = pipefd [0];
		690	}
		691
		692	req->type = EIO_DUP2;
		693	req->int1 = close_pipe;
		694	req->sv2 = newSVsv (fh);
		695	req->int2 = fd;
		696
		697	REQ_SEND (req);
		698	}
		699
		700	void
		701	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
		702	ALIAS:
		703	aio_read = EIO_READ
		704	aio_write = EIO_WRITE
		705	PROTOTYPE: $$$$$;$
		706	PPCODE:
		707	{
		708	STRLEN svlen;
		709	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
		710	char *svptr = SvPVbyte (data, svlen);
		711	UV len = SvUV (length);
		712
		713	if (dataoffset < 0)
		714	dataoffset += svlen;
		715
		716	if (dataoffset < 0 || dataoffset > svlen)
		717	croak ("dataoffset outside of data scalar");
		718
		719	if (ix == EIO_WRITE)
		720	{
		721	/* write: check length and adjust. */
		722	if (!SvOK (length) || len + dataoffset > svlen)
		723	len = svlen - dataoffset;
		724	}
		725	else
		726	{
		727	/* read: check type and grow scalar as necessary */
		728	SvUPGRADE (data, SVt_PV);
		729	svptr = SvGROW (data, len + dataoffset + 1);
		730	}
		731
		732	{
		733	dREQ;
		734
		735	req->type = ix;
		736	req->sv1 = newSVsv (fh);
		737	req->int1 = fd;
		738	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		739	req->size = len;
		740	req->sv2 = SvREFCNT_inc (data);
		741	req->ptr2 = (char *)svptr + dataoffset;
		742	req->stroffset = dataoffset;
		743
		744	if (!SvREADONLY (data))
396	cur--;	745	{
		746	SvREADONLY_on (data);
		747	req->flags |= FLAG_SV2_RO_OFF;
397	}	748	}
398		749
399	while (started > nthreads)	750	REQ_SEND;
		751	}
		752	}
		753
		754	void
		755	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		756	PROTOTYPE: $$;$
		757	PPCODE:
		758	{
		759	SV *data;
		760	dREQ;
		761
		762	req->type = EIO_READLINK;
		763	req->sv1 = newSVsv (path);
		764	req->ptr1 = SvPVbyte_nolen (req->sv1);
		765
		766	REQ_SEND;
		767	}
		768
		769	void
		770	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
		771	PROTOTYPE: $$$$;$
		772	PPCODE:
		773	{
		774	int ifd = s_fileno_croak (in_fh , 0);
		775	int ofd = s_fileno_croak (out_fh, 1);
		776	dREQ;
		777
		778	req->type = EIO_SENDFILE;
		779	req->sv1 = newSVsv (out_fh);
		780	req->int1 = ofd;
		781	req->sv2 = newSVsv (in_fh);
		782	req->int2 = ifd;
		783	req->offs = in_offset;
		784	req->size = length;
		785
		786	REQ_SEND;
		787	}
		788
		789	void
		790	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
		791	PROTOTYPE: $$$;$
		792	PPCODE:
		793	{
		794	int fd = s_fileno_croak (fh, 0);
		795	dREQ;
		796
		797	req->type = EIO_READAHEAD;
		798	req->sv1 = newSVsv (fh);
		799	req->int1 = fd;
		800	req->offs = offset;
		801	req->size = length;
		802
		803	REQ_SEND;
		804	}
		805
		806	void
		807	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
		808	ALIAS:
		809	aio_stat = EIO_STAT
		810	aio_lstat = EIO_LSTAT
		811	PPCODE:
		812	{
		813	dREQ;
		814
		815	req->sv1 = newSVsv (fh_or_path);
		816
		817	if (SvPOK (req->sv1))
		818	{
		819	req->type = ix;
		820	req->ptr1 = SvPVbyte_nolen (req->sv1);
		821	}
		822	else
		823	{
		824	req->type = EIO_FSTAT;
		825	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		826	}
		827
		828	REQ_SEND;
		829	}
		830
		831	void
		832	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		833	PPCODE:
		834	{
		835	dREQ;
		836
		837	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		838	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		839	req->sv1 = newSVsv (fh_or_path);
		840
		841	if (SvPOK (req->sv1))
		842	{
		843	req->type = EIO_UTIME;
		844	req->ptr1 = SvPVbyte_nolen (req->sv1);
		845	}
		846	else
		847	{
		848	req->type = EIO_FUTIME;
		849	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		850	}
		851
		852	REQ_SEND;
		853	}
		854
		855	void
		856	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		857	PPCODE:
		858	{
		859	dREQ;
		860
		861	req->sv1 = newSVsv (fh_or_path);
		862	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		863
		864	if (SvPOK (req->sv1))
		865	{
		866	req->type = EIO_TRUNCATE;
		867	req->ptr1 = SvPVbyte_nolen (req->sv1);
		868	}
		869	else
		870	{
		871	req->type = EIO_FTRUNCATE;
		872	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		873	}
		874
		875	REQ_SEND;
		876	}
		877
		878	void
		879	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		880	ALIAS:
		881	aio_chmod = EIO_CHMOD
		882	aio_mkdir = EIO_MKDIR
		883	PPCODE:
		884	{
		885	dREQ;
		886
		887	req->int2 = mode;
		888	req->sv1 = newSVsv (fh_or_path);
		889
		890	if (SvPOK (req->sv1))
		891	{
		892	req->type = ix;
		893	req->ptr1 = SvPVbyte_nolen (req->sv1);
		894	}
		895	else
		896	{
		897	req->type = EIO_FCHMOD;
		898	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		899	}
		900
		901	REQ_SEND;
		902	}
		903
		904	void
		905	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		906	PPCODE:
		907	{
		908	dREQ;
		909
		910	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		911	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		912	req->sv1 = newSVsv (fh_or_path);
		913
		914	if (SvPOK (req->sv1))
		915	{
		916	req->type = EIO_CHOWN;
		917	req->ptr1 = SvPVbyte_nolen (req->sv1);
		918	}
		919	else
		920	{
		921	req->type = EIO_FCHOWN;
		922	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		923	}
		924
		925	REQ_SEND;
		926	}
		927
		928	void
		929	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		930	PPCODE:
		931	{
		932	dREQ;
		933
		934	req->type = EIO_READDIR;
		935	req->sv1 = newSVsv (pathname);
		936	req->ptr1 = SvPVbyte_nolen (req->sv1);
		937	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		938
		939	if (flags & EIO_READDIR_DENTS)
		940	req->int1 |= EIO_READDIR_CUSTOM2;
		941
		942	REQ_SEND;
		943	}
		944
		945	void
		946	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
		947	ALIAS:
		948	aio_unlink = EIO_UNLINK
		949	aio_rmdir = EIO_RMDIR
		950	aio_readdir = EIO_READDIR
		951	PPCODE:
		952	{
		953	dREQ;
		954
		955	req->type = ix;
		956	req->sv1 = newSVsv (pathname);
		957	req->ptr1 = SvPVbyte_nolen (req->sv1);
		958
		959	REQ_SEND;
		960	}
		961
		962	void
		963	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
		964	ALIAS:
		965	aio_link = EIO_LINK
		966	aio_symlink = EIO_SYMLINK
		967	aio_rename = EIO_RENAME
		968	PPCODE:
		969	{
		970	dREQ;
		971
		972	req->type = ix;
		973	req->sv1 = newSVsv (oldpath);
		974	req->ptr1 = SvPVbyte_nolen (req->sv1);
		975	req->sv2 = newSVsv (newpath);
		976	req->ptr2 = SvPVbyte_nolen (req->sv2);
		977
		978	REQ_SEND;
		979	}
		980
		981	void
		982	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		983	PPCODE:
		984	{
		985	dREQ;
		986
		987	req->type = EIO_MKNOD;
		988	req->sv1 = newSVsv (pathname);
		989	req->ptr1 = SvPVbyte_nolen (req->sv1);
		990	req->int2 = (mode_t)mode;
		991	req->offs = dev;
		992
		993	REQ_SEND;
		994	}
		995
		996	void
		997	aio_busy (double delay, SV *callback=&PL_sv_undef)
		998	PPCODE:
		999	{
		1000	dREQ;
		1001
		1002	req->type = EIO_BUSY;
		1003	req->nv1 = delay < 0. ? 0. : delay;
		1004
		1005	REQ_SEND;
		1006	}
		1007
		1008	void
		1009	aio_group (SV *callback=&PL_sv_undef)
		1010	PROTOTYPE: ;$
		1011	PPCODE:
		1012	{
		1013	dREQ;
		1014
		1015	req->type = EIO_GROUP;
		1016
		1017	req_submit (req);
		1018	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1019	}
		1020
		1021	void
		1022	aio_nop (SV *callback=&PL_sv_undef)
		1023	ALIAS:
		1024	aio_nop = EIO_NOP
		1025	aio_sync = EIO_SYNC
		1026	PPCODE:
		1027	{
		1028	dREQ;
		1029
		1030	req->type = ix;
		1031
		1032	REQ_SEND;
		1033	}
		1034
		1035	int
		1036	aioreq_pri (int pri = 0)
		1037	PROTOTYPE: ;$
		1038	CODE:
		1039	RETVAL = next_pri;
		1040	if (items > 0)
		1041	{
		1042	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1043	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1044	next_pri = pri;
		1045	}
		1046	OUTPUT:
		1047	RETVAL
		1048
		1049	void
		1050	aioreq_nice (int nice = 0)
		1051	CODE:
		1052	nice = next_pri - nice;
		1053	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1054	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1055	next_pri = nice;
		1056
		1057	void
		1058	flush ()
		1059	PROTOTYPE:
		1060	CODE:
		1061	while (eio_nreqs ())
400	{	1062	{
401	poll_wait ();	1063	poll_wait ();
402	poll_cb ();	1064	poll_cb ();
403	}	1065	}
404	}
405		1066
406	int	1067	int
407	max_outstanding(nreqs)	1068	poll()
408	int nreqs
409	PROTOTYPE: $
410	CODE:
411	RETVAL = max_outstanding;
412	max_outstanding = nreqs;
413
414	void
415	aio_open(pathname,flags,mode,callback)
416	SV * pathname
417	int flags
418	int mode
419	SV * callback
420	PROTOTYPE: $$$$
421	CODE:
422	{
423	aio_req req;
424
425	Newz (0, req, 1, aio_cb);
426
427	if (!req)
428	croak ("out of memory during aio_req allocation");
429
430	req->type = REQ_OPEN;
431	req->data = newSVsv (pathname);
432	req->dataptr = SvPV_nolen (req->data);
433	req->fd = flags;
434	req->mode = mode;
435	req->callback = SvREFCNT_inc (callback);
436
437	send_req (req);
438	}
439
440	void
441	aio_close(fh,callback)
442	InputStream fh
443	SV * callback
444	PROTOTYPE: $$
445	ALIAS:
446	aio_close = REQ_CLOSE
447	aio_fsync = REQ_FSYNC
448	aio_fdatasync = REQ_FDATASYNC
449	CODE:
450	{
451	aio_req req;
452
453	Newz (0, req, 1, aio_cb);
454
455	if (!req)
456	croak ("out of memory during aio_req allocation");
457
458	req->type = ix;
459	req->fd = PerlIO_fileno (fh);
460	req->callback = SvREFCNT_inc (callback);
461
462	send_req (req);
463	}
464
465	void
466	aio_read(fh,offset,length,data,dataoffset,callback)
467	InputStream fh
468	UV offset
469	IV length
470	SV * data
471	IV dataoffset
472	SV * callback
473	PROTOTYPE: $$$$$$
474	CODE:
475	read_write (0, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
476
477	void
478	aio_write(fh,offset,length,data,dataoffset,callback)
479	OutputStream fh
480	UV offset
481	IV length
482	SV * data
483	IV dataoffset
484	SV * callback
485	PROTOTYPE: $$$$$$
486	CODE:
487	read_write (1, PerlIO_fileno (fh), offset, length, data, dataoffset, callback);
488
489	void
490	aio_readahead(fh,offset,length,callback)
491	InputStream fh
492	UV offset
493	IV length
494	SV * callback
495	PROTOTYPE: $$$$
496	CODE:
497	{
498	aio_req req;
499
500	if (length < 0)
501	croak ("length must not be negative");
502
503	Newz (0, req, 1, aio_cb);
504
505	if (!req)
506	croak ("out of memory during aio_req allocation");
507
508	req->type = REQ_READAHEAD;
509	req->fd = PerlIO_fileno (fh);
510	req->offset = offset;
511	req->length = length;
512	req->callback = SvREFCNT_inc (callback);
513
514	send_req (req);
515	}
516
517	void
518	aio_stat(fh_or_path,callback)
519	SV * fh_or_path
520	SV * callback
521	PROTOTYPE: $$
522	ALIAS:
523	aio_lstat = 1
524	CODE:
525	{
526	aio_req req;
527
528	Newz (0, req, 1, aio_cb);
529
530	if (!req)
531	croak ("out of memory during aio_req allocation");
532
533	New (0, req->statdata, 1, Stat_t);
534
535	if (!req->statdata)
536	croak ("out of memory during aio_req->statdata allocation");
537
538	if (SvPOK (fh_or_path))
539	{
540	req->type = ix ? REQ_LSTAT : REQ_STAT;
541	req->data = newSVsv (fh_or_path);
542	req->dataptr = SvPV_nolen (req->data);
543	}
544	else
545	{
546	req->type = REQ_FSTAT;
547	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
548	}
549
550	req->callback = SvREFCNT_inc (callback);
551
552	send_req (req);
553	}
554
555	void
556	aio_unlink(pathname,callback)
557	SV * pathname
558	SV * callback
559	PROTOTYPE: $$
560	CODE:
561	{
562	aio_req req;
563
564	Newz (0, req, 1, aio_cb);
565
566	if (!req)
567	croak ("out of memory during aio_req allocation");
568
569	req->type = REQ_UNLINK;
570	req->data = newSVsv (pathname);
571	req->dataptr = SvPV_nolen (req->data);
572	req->callback = SvREFCNT_inc (callback);
573
574	send_req (req);
575	}
576
577	void
578	flush()
579	PROTOTYPE:	1069	PROTOTYPE:
580	CODE:	1070	CODE:
581	while (nreqs)
582	{
583	poll_wait ();	1071	poll_wait ();
584	poll_cb ();	1072	RETVAL = poll_cb ();
585	}	1073	OUTPUT:
		1074	RETVAL
586		1075
587	int	1076	int
588	poll_fileno()	1077	poll_fileno()
589	PROTOTYPE:	1078	PROTOTYPE:
590	CODE:	1079	CODE:
591	RETVAL = respipe [0];	1080	RETVAL = s_epipe_fd (&respipe);
592	OUTPUT:	1081	OUTPUT:
593	RETVAL	1082	RETVAL
594		1083
595	int	1084	int
596	poll_cb(...)	1085	poll_cb(...)
…		…
602		1091
603	void	1092	void
604	poll_wait()	1093	poll_wait()
605	PROTOTYPE:	1094	PROTOTYPE:
606	CODE:	1095	CODE:
607	if (nreqs)
608	poll_wait ();	1096	poll_wait ();
609		1097
610	int	1098	int
611	nreqs()	1099	nreqs()
612	PROTOTYPE:	1100	PROTOTYPE:
613	CODE:	1101	CODE:
614	RETVAL = nreqs;	1102	RETVAL = eio_nreqs ();
615	OUTPUT:	1103	OUTPUT:
616	RETVAL	1104	RETVAL
617		1105
		1106	int
		1107	nready()
		1108	PROTOTYPE:
		1109	CODE:
		1110	RETVAL = eio_nready ();
		1111	OUTPUT:
		1112	RETVAL
		1113
		1114	int
		1115	npending()
		1116	PROTOTYPE:
		1117	CODE:
		1118	RETVAL = eio_npending ();
		1119	OUTPUT:
		1120	RETVAL
		1121
		1122	int
		1123	nthreads()
		1124	PROTOTYPE:
		1125	CODE:
		1126	RETVAL = eio_nthreads ();
		1127	OUTPUT:
		1128	RETVAL
		1129
		1130	int
		1131	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1132	PROTOTYPE: $$$$
		1133	CODE:
		1134	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1135	RETVAL = posix_fadvise (fh, offset, length, advice);
		1136	#else
		1137	RETVAL = errno = ENOSYS;
		1138	#endif
		1139	OUTPUT:
		1140	RETVAL
		1141
		1142	ssize_t
		1143	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1144	PROTOTYPE: $$$$
		1145	CODE:
		1146	eio_sendfile_sync (ofh, ifh, offset, count);
		1147
		1148	void _on_next_submit (SV *cb)
		1149	CODE:
		1150	SvREFCNT_dec (on_next_submit);
		1151	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1152
		1153	PROTOTYPES: DISABLE
		1154
		1155	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1156
		1157	void
		1158	cancel (aio_req_ornot req)
		1159	CODE:
		1160	eio_cancel (req);
		1161
		1162	void
		1163	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1164	PPCODE:
		1165	{
		1166	if (GIMME_V != G_VOID)
		1167	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1168
		1169	if (items > 1)
		1170	{
		1171	SV *cb_cv =get_cb (callback);
		1172
		1173	SvREFCNT_dec (req->callback);
		1174	req->callback = SvREFCNT_inc (cb_cv);
		1175	}
		1176	}
		1177
		1178	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1179
		1180	void
		1181	add (aio_req grp, ...)
		1182	PPCODE:
		1183	{
		1184	int i;
		1185
		1186	if (grp->int1 == 2)
		1187	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1188
		1189	for (i = 1; i < items; ++i )
		1190	{
		1191	aio_req req;
		1192
		1193	if (GIMME_V != G_VOID)
		1194	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1195
		1196	req = SvAIO_REQ (ST (i));
		1197
		1198	if (req)
		1199	eio_grp_add (grp, req);
		1200	}
		1201	}
		1202
		1203	void
		1204	cancel_subs (aio_req_ornot req)
		1205	CODE:
		1206	req_cancel_subs (req);
		1207
		1208	void
		1209	result (aio_req grp, ...)
		1210	CODE:
		1211	{
		1212	int i;
		1213	AV *av;
		1214
		1215	grp->errorno = errno;
		1216
		1217	av = newAV ();
		1218	av_extend (av, items - 1);
		1219
		1220	for (i = 1; i < items; ++i )
		1221	av_push (av, newSVsv (ST (i)));
		1222
		1223	SvREFCNT_dec (grp->sv1);
		1224	grp->sv1 = (SV *)av;
		1225	}
		1226
		1227	void
		1228	errno (aio_req grp, int errorno = errno)
		1229	CODE:
		1230	grp->errorno = errorno;
		1231
		1232	void
		1233	limit (aio_req grp, int limit)
		1234	CODE:
		1235	eio_grp_limit (grp, limit);
		1236
		1237	void
		1238	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1239	CODE:
		1240	{
		1241	SvREFCNT_dec (grp->sv2);
		1242	grp->sv2 = newSVsv (callback);
		1243	grp->feed = aio_grp_feed;
		1244
		1245	if (grp->int2 <= 0)
		1246	grp->int2 = 2;
		1247
		1248	eio_grp_limit (grp, grp->int2);
		1249	}
		1250

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