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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.52 by root, Sun Oct 22 22:14:54 2006 UTC vs.
Revision 1.159 by root, Thu Jan 7 18:08:21 2010 UTC

1	#define _REENTRANT 1	1	#include "libeio/xthread.h"
		2
2	#include <errno.h>	3	#include <errno.h>
3		4
4	#include "EXTERN.h"	5	#include "EXTERN.h"
5	#include "perl.h"	6	#include "perl.h"
6	#include "XSUB.h"	7	#include "XSUB.h"
7		8
8	#include "autoconf/config.h"	9	#include "schmorp.h"
9
10	#include <pthread.h>
11		10
12	#include <stddef.h>	11	#include <stddef.h>
		12	#include <stdlib.h>
13	#include <errno.h>	13	#include <errno.h>
14	#include <sys/time.h>
15	#include <sys/select.h>
16	#include <sys/types.h>	14	#include <sys/types.h>
17	#include <sys/stat.h>	15	#include <sys/stat.h>
		16	#include <sys/statvfs.h>
18	#include <limits.h>	17	#include <limits.h>
19	#include <unistd.h>
20	#include <fcntl.h>	18	#include <fcntl.h>
21	#include <signal.h>
22	#include <sched.h>	19	#include <sched.h>
23		20
24	#if HAVE_SENDFILE	21	/* perl namespace pollution */
25	# if __linux	22	#undef VERSION
26	# include <sys/sendfile.h>
27	# elif __freebsd
28	# include <sys/socket.h>
29	# include <sys/uio.h>
30	# elif __hpux
31	# include <sys/socket.h>
32	# elif __solaris /* not yet */
33	# include <sys/sendfile.h>
34	# else
35	# error sendfile support requested but not available
36	# endif
37	#endif
38		23
39	/* used for struct dirent, AIX doesn't provide it */	24	#ifdef _WIN32
40	#ifndef NAME_MAX
41	# define NAME_MAX 4096
42	#endif
43		25
44	#if __ia64	26	# define EIO_STRUCT_DIRENT Direntry_t
45	# define STACKSIZE 65536	27	# undef malloc
		28	# undef free
		29
		30	// perl overrides all those nice win32 functions
		31	# undef open
		32	# undef read
		33	# undef write
		34	# undef send
		35	# undef recv
		36	# undef stat
		37	# undef fstat
		38	# define lstat stat
		39	# undef truncate
		40	# undef ftruncate
		41	# undef open
		42	# undef close
		43	# undef unlink
		44	# undef rmdir
		45	# undef rename
		46	# undef lseek
		47
		48	# define chown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchown(a,b,c) (errno = ENOSYS, -1)
		50	# define fchmod(a,b) (errno = ENOSYS, -1)
		51	# define symlink(a,b) (errno = ENOSYS, -1)
		52	# define readlink(a,b,c) (errno = ENOSYS, -1)
		53	# define mknod(a,b,c) (errno = ENOSYS, -1)
		54	# define truncate(a,b) (errno = ENOSYS, -1)
		55	# define ftruncate(fd,o) chsize ((fd), (o))
		56	# define fsync(fd) _commit (fd)
		57	# define opendir(fd) (errno = ENOSYS, 0)
		58	# define readdir(fd) (errno = ENOSYS, -1)
		59	# define closedir(fd) (errno = ENOSYS, -1)
		60	# define mkdir(a,b) mkdir (a)
		61
46	#else	62	#else
47	# define STACKSIZE 8192	63
		64	# include <sys/time.h>
		65	# include <sys/select.h>
		66	# include <unistd.h>
		67	# include <utime.h>
		68	# include <signal.h>
		69	# define EIO_STRUCT_DIRENT struct dirent
		70
48	#endif	71	#endif
		72
		73	/* perl stupidly overrides readdir and maybe others */
		74	/* with thread-unsafe versions, imagine that :( */
		75	#undef readdir
		76	#undef opendir
		77	#undef closedir
		78
		79	#define EIO_STRUCT_STAT Stat_t
		80
		81	/* use NV for 32 bit perls as it allows larger offsets */
		82	#if IVSIZE >= 8
		83	# define VAL64 IV
		84	# define SvVAL64 SvIV
		85	# define newSVval64 newSViv
		86	#else
		87	# define VAL64 NV
		88	# define SvVAL64 SvNV
		89	# define newSVval64 newSVnv
		90	#endif
		91
		92	/*****************************************************************************/
		93
		94	#if __GNUC__ >= 3
		95	# define expect(expr,value) __builtin_expect ((expr),(value))
		96	#else
		97	# define expect(expr,value) (expr)
		98	#endif
		99
		100	#define expect_false(expr) expect ((expr) != 0, 0)
		101	#define expect_true(expr) expect ((expr) != 0, 1)
		102
		103	/*****************************************************************************/
		104
		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	static HV *aio_stash, *aio_req_stash, *aio_grp_stash;
		110
		111	#define EIO_REQ_MEMBERS \
		112	SV *callback; \
		113	SV *sv1, *sv2; \
		114	STRLEN stroffset; \
		115	SV *self;
		116
		117	#define EIO_NO_WRAPPERS 1
		118
		119	#include "libeio/eio.h"
		120
		121	#ifndef POSIX_FADV_NORMAL
		122	# define POSIX_FADV_NORMAL 0
		123	# define NO_FADVISE 1
		124	#endif
		125
		126	#ifndef POSIX_FADV_SEQUENTIAL
		127	# define POSIX_FADV_SEQUENTIAL 0
		128	#endif
		129
		130	#ifndef POSIX_FADV_RANDOM
		131	# define POSIX_FADV_RANDOM 0
		132	#endif
		133
		134	#ifndef POSIX_FADV_NOREUSE
		135	# define POSIX_FADV_NOREUSE 0
		136	#endif
		137
		138	#ifndef POSIX_FADV_WILLNEED
		139	# define POSIX_FADV_WILLNEED 0
		140	#endif
		141
		142	#ifndef POSIX_FADV_DONTNEED
		143	# define POSIX_FADV_DONTNEED 0
		144	#endif
		145
		146	#ifndef ST_NODEV
		147	# define ST_NODEV 0
		148	#endif
		149
		150	#ifndef ST_NOEXEC
		151	# define ST_NOEXEC 0
		152	#endif
		153
		154	#ifndef ST_SYNCHRONOUS
		155	# define ST_SYNCHRONOUS 0
		156	#endif
		157
		158	#ifndef ST_MANDLOCK
		159	# define ST_MANDLOCK 0
		160	#endif
		161
		162	#ifndef ST_WRITE
		163	# define ST_WRITE 0
		164	#endif
		165
		166	#ifndef ST_APPEND
		167	# define ST_APPEND 0
		168	#endif
		169
		170	#ifndef ST_IMMUTABLE
		171	# define ST_IMMUTABLE 0
		172	#endif
		173
		174	#ifndef ST_NOATIME
		175	# define ST_NOATIME 0
		176	#endif
		177
		178	#ifndef ST_NODIRATIME
		179	# define ST_NODIRATIME 0
		180	#endif
		181
		182	#ifndef ST_RELATIME
		183	# define ST_RELATIME 0
		184	#endif
		185
		186	static int req_invoke (eio_req *req);
		187	#define EIO_FINISH(req) req_invoke (req)
		188	static void req_destroy (eio_req *grp);
		189	#define EIO_DESTROY(req) req_destroy (req)
49		190
50	enum {	191	enum {
51	REQ_QUIT,	192	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
52	REQ_OPEN, REQ_CLOSE,
53	REQ_READ, REQ_WRITE, REQ_READAHEAD,
54	REQ_SENDFILE,
55	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
56	REQ_FSYNC, REQ_FDATASYNC,
57	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
58	REQ_READDIR,
59	REQ_LINK, REQ_SYMLINK,
60	REQ_SLEEP,
61	REQ_GROUP,
62	};	193	};
63		194
64	#define AIO_REQ_KLASS "IO::AIO::REQ"	195	#include "libeio/eio.c"
65	#define AIO_GRP_KLASS "IO::AIO::GRP"
66		196
67	typedef struct aio_cb
68	{
69	struct aio_cb *volatile next;
70
71	struct aio_cb *grp, *grp_prev, *grp_next, *grp_first;
72
73	SV *self; /* the perl counterpart of this request, if any */
74
75	SV *data, *callback;
76	SV *fh, *fh2;
77	void *dataptr, *data2ptr;
78	Stat_t *statdata;
79	off_t offset;
80	size_t length;
81	ssize_t result;
82
83	int type;
84	int fd, fd2;
85	int errorno;
86	STRLEN dataoffset;
87	mode_t mode; /* open */
88	unsigned char cancelled;
89	} aio_cb;
90
91	typedef aio_cb *aio_req;	197	typedef eio_req *aio_req;
92	typedef aio_cb *aio_req_ornot;	198	typedef eio_req *aio_req_ornot;
93		199
94	static int started, wanted;	200	static SV *on_next_submit;
95	static volatile int nreqs;	201	static int next_pri = EIO_PRI_DEFAULT;
96	static int max_outstanding = 1<<30;	202	static int max_outstanding;
97	static int respipe [2];
98		203
99	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	204	static s_epipe respipe;
100	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
101	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
102		205
103	static volatile aio_req reqs, reqe; /* queue start, queue end */	206	static void req_destroy (aio_req req);
104	static volatile aio_req ress, rese; /* queue start, queue end */
105
106	static void req_invoke (aio_req req);	207	static void req_cancel (aio_req req);
107	static void req_free (aio_req req);	208
		209	static void want_poll (void)
		210	{
		211	/* write a dummy byte to the pipe so fh becomes ready */
		212	s_epipe_signal (&respipe);
		213	}
		214
		215	static void done_poll (void)
		216	{
		217	/* read any signals sent by the worker threads */
		218	s_epipe_drain (&respipe);
		219	}
108		220
109	/* must be called at most once */	221	/* must be called at most once */
110	static SV *req_sv (aio_req req, const char *klass)	222	static SV *req_sv (aio_req req, HV *stash)
111	{	223	{
112	if (!req->self)	224	if (!req->self)
113	{	225	{
114	req->self = (SV *)newHV ();	226	req->self = (SV *)newHV ();
115	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	227	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
116	}	228	}
117		229
118	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));	230	return sv_2mortal (sv_bless (newRV_inc (req->self), stash));
119	}	231	}
120		232
121	static aio_req SvAIO_REQ (SV *sv)	233	static aio_req SvAIO_REQ (SV *sv)
122	{	234	{
123	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))	235	MAGIC *mg;
		236
		237	if (!SvROK (sv)
		238	|| (SvSTASH (SvRV (sv)) != aio_grp_stash
		239	&& SvSTASH (SvRV (sv)) != aio_req_stash
		240	&& !sv_derived_from (sv, "IO::AIO::REQ")))
124	croak ("object of class " AIO_REQ_KLASS " expected");	241	croak ("object of class IO::AIO::REQ expected");
125		242
126	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	243	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
127		244
128	return mg ? (aio_req)mg->mg_ptr : 0;	245	return mg ? (aio_req)mg->mg_ptr : 0;
129	}	246	}
130		247
131	static void aio_grp_feed (aio_req grp)	248	static void aio_grp_feed (aio_req grp)
132	{	249	{
133	while (grp->length < grp->fd2)	250	if (grp->sv2 && SvOK (grp->sv2))
134	{	251	{
135	int old_len = grp->length;	252	dSP;
136		253
137	if (grp->fh2 && SvOK (grp->fh2))	254	ENTER;
		255	SAVETMPS;
		256	PUSHMARK (SP);
		257	XPUSHs (req_sv (grp, aio_grp_stash));
		258	PUTBACK;
		259	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		260	SPAGAIN;
		261	FREETMPS;
		262	LEAVE;
		263	}
		264	}
		265
		266	static void req_submit (eio_req *req)
		267	{
		268	eio_submit (req);
		269
		270	if (expect_false (on_next_submit))
		271	{
		272	dSP;
		273	SV *cb = sv_2mortal (on_next_submit);
		274
		275	on_next_submit = 0;
		276
		277	PUSHMARK (SP);
		278	PUTBACK;
		279	call_sv (cb, G_DISCARD | G_EVAL);
		280	}
		281	}
		282
		283	static int req_invoke (eio_req *req)
		284	{
		285	dSP;
		286
		287	if (req->flags & FLAG_SV2_RO_OFF)
		288	SvREADONLY_off (req->sv2);
		289
		290	if (!EIO_CANCELLED (req) && req->callback)
		291	{
		292	ENTER;
		293	SAVETMPS;
		294	PUSHMARK (SP);
		295	EXTEND (SP, 1);
		296
		297	switch (req->type)
138	{	298	{
139	dSP;	299	case EIO_READDIR:
		300	{
		301	SV *rv = &PL_sv_undef;
140		302
141	ENTER;	303	if (req->result >= 0)
142	SAVETMPS;	304	{
143	PUSHMARK (SP);	305	int i;
144	XPUSHs (req_sv (grp, AIO_GRP_KLASS));	306	char *names = (char *)req->ptr2;
145	PUTBACK;	307	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
146	call_sv (grp->fh2, G_VOID | G_EVAL);	308	AV *av = newAV ();
147	SPAGAIN;	309
148	FREETMPS;	310	av_extend (av, req->result - 1);
149	LEAVE;	311
		312	for (i = 0; i < req->result; ++i)
		313	{
		314	if (req->int1 & EIO_READDIR_DENTS)
		315	{
		316	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		317
		318	if (req->int1 & EIO_READDIR_CUSTOM2)
		319	{
		320	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		321	AV *avent = newAV ();
		322
		323	av_extend (avent, 2);
		324
		325	if (!sv_type [ent->type])
		326	{
		327	sv_type [ent->type] = newSViv (ent->type);
		328	SvREADONLY_on (sv_type [ent->type]);
		329	}
		330
		331	av_store (avent, 0, namesv);
		332	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		333	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		334
		335	av_store (av, i, newRV_noinc ((SV *)avent));
		336	}
		337	else
		338	av_store (av, i, namesv);
		339
		340	++ent;
		341	}
		342	else
		343	{
		344	SV *name = newSVpv (names, 0);
		345	av_store (av, i, name);
		346	names += SvCUR (name) + 1;
		347	}
		348	}
		349
		350	rv = sv_2mortal (newRV_noinc ((SV *)av));
		351	}
		352
		353	PUSHs (rv);
		354
		355	if (req->int1 & EIO_READDIR_CUSTOM1)
		356	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		357	}
		358	break;
		359
		360	case EIO_OPEN:
		361	{
		362	/* convert fd to fh */
		363	SV *fh = &PL_sv_undef;
		364
		365	if (req->result >= 0)
		366	{
		367	GV *gv = (GV *)sv_newmortal ();
		368	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		369	char sym [64];
		370	int symlen;
		371
		372	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		373	gv_init (gv, aio_stash, sym, symlen, 0);
		374
		375	symlen = snprintf (
		376	sym,
		377	sizeof (sym),
		378	"%s&=%d",
		379	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		380	(int)req->result
		381	);
		382
		383	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		384	fh = (SV *)gv;
		385	}
		386
		387	PUSHs (fh);
		388	}
		389	break;
		390
		391	case EIO_STATVFS:
		392	case EIO_FSTATVFS:
		393	{
		394	SV *rv = &PL_sv_undef;
		395
		396	if (req->result >= 0)
		397	{
		398	EIO_STRUCT_STATVFS *f = EIO_STATVFS_BUF (req);
		399	HV *hv = newHV ();
		400
		401	rv = sv_2mortal (newRV_noinc (hv));
		402
		403	hv_store (hv, "bsize" , sizeof ("bsize" ) - 1, newSVval64 (f->f_bsize ), 0);
		404	hv_store (hv, "frsize" , sizeof ("frsize" ) - 1, newSVval64 (f->f_frsize ), 0);
		405	hv_store (hv, "blocks" , sizeof ("blocks" ) - 1, newSVval64 (f->f_blocks ), 0);
		406	hv_store (hv, "bfree" , sizeof ("bfree" ) - 1, newSVval64 (f->f_bfree ), 0);
		407	hv_store (hv, "bavail" , sizeof ("bavail" ) - 1, newSVval64 (f->f_bavail ), 0);
		408	hv_store (hv, "files" , sizeof ("files" ) - 1, newSVval64 (f->f_files ), 0);
		409	hv_store (hv, "ffree" , sizeof ("ffree" ) - 1, newSVval64 (f->f_ffree ), 0);
		410	hv_store (hv, "favail" , sizeof ("favail" ) - 1, newSVval64 (f->f_favail ), 0);
		411	hv_store (hv, "fsid" , sizeof ("fsid" ) - 1, newSVval64 (f->f_fsid ), 0);
		412	hv_store (hv, "flag" , sizeof ("flag" ) - 1, newSVval64 (f->f_flag ), 0);
		413	hv_store (hv, "namemax", sizeof ("namemax") - 1, newSVval64 (f->f_namemax), 0);
		414	}
		415
		416	PUSHs (rv);
		417	}
		418
		419	break;
		420
		421	case EIO_GROUP:
		422	req->int1 = 2; /* mark group as finished */
		423
		424	if (req->sv1)
		425	{
		426	int i;
		427	AV *av = (AV *)req->sv1;
		428
		429	EXTEND (SP, AvFILL (av) + 1);
		430	for (i = 0; i <= AvFILL (av); ++i)
		431	PUSHs (*av_fetch (av, i, 0));
		432	}
		433	break;
		434
		435	case EIO_NOP:
		436	case EIO_BUSY:
		437	break;
		438
		439	case EIO_READLINK:
		440	if (req->result > 0)
		441	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		442	break;
		443
		444	case EIO_STAT:
		445	case EIO_LSTAT:
		446	case EIO_FSTAT:
		447	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		448	PL_laststatval = req->result;
		449	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		450	PUSHs (sv_2mortal (newSViv (req->result)));
		451	break;
		452
		453	case EIO_READ:
		454	{
		455	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		456	*SvEND (req->sv2) = 0;
		457	SvPOK_only (req->sv2);
		458	SvSETMAGIC (req->sv2);
		459	PUSHs (sv_2mortal (newSViv (req->result)));
		460	}
		461	break;
		462
		463	case EIO_DUP2:
		464	if (req->result > 0)
		465	req->result = 0;
		466	/* FALLTHROUGH */
		467
		468	default:
		469	PUSHs (sv_2mortal (newSViv (req->result)));
		470	break;
150	}	471	}
151		472
152	/* stop if no progress has been made */	473	errno = req->errorno;
153	if (old_len == grp->length)	474
154	{	475	PUTBACK;
155	SvREFCNT_dec (grp->fh2);	476	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
156	grp->fh2 = 0;	477	SPAGAIN;
157	break;	478
158	}	479	FREETMPS;
		480	LEAVE;
		481
		482	PUTBACK;
159	}	483	}
160	}
161		484
162	static void aio_grp_dec (aio_req grp)	485	return !!SvTRUE (ERRSV);
163	{
164	--grp->length;
165
166	/* call feeder, if applicable */
167	aio_grp_feed (grp);
168
169	/* finish, if done */
170	if (!grp->length && grp->fd)
171	{
172	req_invoke (grp);
173	req_free (grp);
174	}
175	}	486	}
176		487
177	static void poll_wait ()
178	{
179	if (nreqs && !ress)
180	{
181	fd_set rfd;
182	FD_ZERO(&rfd);
183	FD_SET(respipe [0], &rfd);
184
185	select (respipe [0] + 1, &rfd, 0, 0, 0);
186	}
187	}
188
189	static void req_invoke (aio_req req)
190	{
191	dSP;
192	int errorno = errno;
193
194	if (req->cancelled || !SvOK (req->callback))
195	return;
196
197	errno = req->errorno;
198
199	ENTER;
200	SAVETMPS;
201	PUSHMARK (SP);
202	EXTEND (SP, 1);
203
204	switch (req->type)
205	{
206	case REQ_READDIR:
207	{
208	SV *rv = &PL_sv_undef;
209
210	if (req->result >= 0)
211	{
212	char *buf = req->data2ptr;
213	AV *av = newAV ();
214
215	while (req->result)
216	{
217	SV *sv = newSVpv (buf, 0);
218
219	av_push (av, sv);
220	buf += SvCUR (sv) + 1;
221	req->result--;
222	}
223
224	rv = sv_2mortal (newRV_noinc ((SV *)av));
225	}
226
227	PUSHs (rv);
228	}
229	break;
230
231	case REQ_OPEN:
232	{
233	/* convert fd to fh */
234	SV *fh;
235
236	PUSHs (sv_2mortal (newSViv (req->result)));
237	PUTBACK;
238	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
239	SPAGAIN;
240
241	fh = SvREFCNT_inc (POPs);
242
243	PUSHMARK (SP);
244	XPUSHs (sv_2mortal (fh));
245	}
246	break;
247
248	case REQ_GROUP:
249	req->fd = 2; /* mark group as finished */
250
251	if (req->data)
252	{
253	int i;
254	AV *av = (AV *)req->data;
255
256	EXTEND (SP, AvFILL (av) + 1);
257	for (i = 0; i <= AvFILL (av); ++i)
258	PUSHs (*av_fetch (av, i, 0));
259	}
260	break;
261
262	case REQ_SLEEP:
263	break;
264
265	default:
266	PUSHs (sv_2mortal (newSViv (req->result)));
267	break;
268	}
269
270
271	PUTBACK;
272	call_sv (req->callback, G_VOID | G_EVAL);
273	SPAGAIN;
274
275	FREETMPS;
276	LEAVE;
277
278	errno = errorno;
279
280	if (SvTRUE (ERRSV))
281	{
282	req_free (req);
283	croak (0);
284	}
285	}
286
287	static void req_free (aio_req req)	488	static void req_destroy (aio_req req)
288	{	489	{
289	if (req->grp)
290	{
291	aio_req grp = req->grp;
292
293	/* unlink request */
294	if (req->grp_next) req->grp_next->grp_prev = req->grp_prev;
295	if (req->grp_prev) req->grp_prev->grp_next = req->grp_next;
296
297	if (grp->grp_first == req)
298	grp->grp_first = req->grp_next;
299
300	aio_grp_dec (grp);
301	}
302
303	if (req->self)	490	if (req->self)
304	{	491	{
305	sv_unmagic (req->self, PERL_MAGIC_ext);	492	sv_unmagic (req->self, PERL_MAGIC_ext);
306	SvREFCNT_dec (req->self);	493	SvREFCNT_dec (req->self);
307	}	494	}
308		495
309	SvREFCNT_dec (req->data);
310	SvREFCNT_dec (req->fh);	496	SvREFCNT_dec (req->sv1);
311	SvREFCNT_dec (req->fh2);	497	SvREFCNT_dec (req->sv2);
312	SvREFCNT_dec (req->callback);	498	SvREFCNT_dec (req->callback);
313	Safefree (req->statdata);
314
315	if (req->type == REQ_READDIR && req->result >= 0)
316	free (req->data2ptr);
317		499
318	Safefree (req);	500	Safefree (req);
319	}	501	}
320		502
321	static void req_cancel (aio_req req)	503	static void req_cancel_subs (aio_req grp)
322	{	504	{
323	req->cancelled = 1;	505	aio_req sub;
324		506
325	if (req->type == REQ_GROUP)	507	if (grp->type != EIO_GROUP)
		508	return;
		509
		510	SvREFCNT_dec (grp->sv2);
		511	grp->sv2 = 0;
		512
		513	eio_grp_cancel (grp);
		514	}
		515
		516	static void
		517	create_respipe (void)
		518	{
		519	if (s_epipe_renew (&respipe))
		520	croak ("IO::AIO: unable to initialize result pipe");
		521	}
		522
		523	static void poll_wait (void)
		524	{
		525	while (eio_nreqs ())
326	{	526	{
327	aio_req sub;	527	int size;
328		528
329	for (sub = req->grp_first; sub; sub = sub->grp_next)	529	X_LOCK (reslock);
330	req_cancel (sub);	530	size = res_queue.size;
		531	X_UNLOCK (reslock);
		532
		533	if (size)
		534	return;
		535
		536	etp_maybe_start_thread ();
		537
		538	s_epipe_wait (&respipe);
331	}	539	}
332	}	540	}
333		541
334	static int poll_cb ()	542	static int poll_cb (void)
335	{	543	{
336	dSP;
337	int count = 0;
338	int do_croak = 0;
339	aio_req req;
340
341	for (;;)	544	for (;;)
342	{	545	{
343	pthread_mutex_lock (&reslock);	546	int res = eio_poll ();
344	req = ress;
345		547
346	if (req)	548	if (res > 0)
347	{
348	ress = req->next;
349
350	if (!ress)
351	{
352	/* read any signals sent by the worker threads */
353	char buf [32];
354	while (read (respipe [0], buf, 32) == 32)
355	;
356
357	rese = 0;
358	}
359	}
360
361	pthread_mutex_unlock (&reslock);
362
363	if (!req)
364	break;	549	croak (0);
365		550
366	--nreqs;	551	if (!max_outstanding || max_outstanding > eio_nreqs ())
		552	return res;
367		553
368	if (req->type == REQ_QUIT)	554	poll_wait ();
369	started--;
370	else if (req->type == REQ_GROUP && req->length)
371	{
372	req->fd = 1; /* mark request as delayed */
373	continue;
374	}
375	else
376	{
377	if (req->type == REQ_READ)
378	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
379
380	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
381	SvREADONLY_off (req->data);
382
383	if (req->statdata)
384	{
385	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
386	PL_laststatval = req->result;
387	PL_statcache = *(req->statdata);
388	}
389
390	req_invoke (req);
391
392	count++;
393	}
394
395	req_free (req);
396	}	555	}
397
398	return count;
399	}
400
401	static void *aio_proc(void *arg);
402
403	static void start_thread (void)
404	{
405	sigset_t fullsigset, oldsigset;
406	pthread_t tid;
407	pthread_attr_t attr;
408
409	pthread_attr_init (&attr);
410	pthread_attr_setstacksize (&attr, STACKSIZE);
411	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
412
413	sigfillset (&fullsigset);
414	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
415
416	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
417	started++;
418
419	sigprocmask (SIG_SETMASK, &oldsigset, 0);
420	}
421
422	static void req_send (aio_req req)
423	{
424	while (started < wanted && nreqs >= started)
425	start_thread ();
426
427	++nreqs;
428
429	pthread_mutex_lock (&reqlock);
430
431	req->next = 0;
432
433	if (reqe)
434	{
435	reqe->next = req;
436	reqe = req;
437	}
438	else
439	reqe = reqs = req;
440
441	pthread_cond_signal (&reqwait);
442	pthread_mutex_unlock (&reqlock);
443
444	if (nreqs > max_outstanding)
445	for (;;)
446	{
447	poll_cb ();
448
449	if (nreqs <= max_outstanding)
450	break;
451
452	poll_wait ();
453	}
454	}
455
456	static void end_thread (void)
457	{
458	aio_req req;
459	Newz (0, req, 1, aio_cb);
460	req->type = REQ_QUIT;
461
462	req_send (req);
463	}
464
465	static void min_parallel (int nthreads)
466	{
467	if (wanted < nthreads)
468	wanted = nthreads;
469	}
470
471	static void max_parallel (int nthreads)
472	{
473	int cur = started;
474
475	if (wanted > nthreads)
476	wanted = nthreads;
477
478	while (cur > wanted)
479	{
480	end_thread ();
481	cur--;
482	}
483
484	while (started > wanted)
485	{
486	poll_wait ();
487	poll_cb ();
488	}
489	}
490
491	static void create_pipe ()
492	{
493	if (pipe (respipe))
494	croak ("unable to initialize result pipe");
495
496	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
497	croak ("cannot set result pipe to nonblocking mode");
498
499	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
500	croak ("cannot set result pipe to nonblocking mode");
501	}
502
503	/*****************************************************************************/
504	/* work around various missing functions */
505
506	#if !HAVE_PREADWRITE
507	# define pread aio_pread
508	# define pwrite aio_pwrite
509
510	/*
511	* make our pread/pwrite safe against themselves, but not against
512	* normal read/write by using a mutex. slows down execution a lot,
513	* but that's your problem, not mine.
514	*/
515	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
516
517	static ssize_t pread (int fd, void *buf, size_t count, off_t offset)
518	{
519	ssize_t res;
520	off_t ooffset;
521
522	pthread_mutex_lock (&preadwritelock);
523	ooffset = lseek (fd, 0, SEEK_CUR);
524	lseek (fd, offset, SEEK_SET);
525	res = read (fd, buf, count);
526	lseek (fd, ooffset, SEEK_SET);
527	pthread_mutex_unlock (&preadwritelock);
528
529	return res;
530	}
531
532	static ssize_t pwrite (int fd, void *buf, size_t count, off_t offset)
533	{
534	ssize_t res;
535	off_t ooffset;
536
537	pthread_mutex_lock (&preadwritelock);
538	ooffset = lseek (fd, 0, SEEK_CUR);
539	lseek (fd, offset, SEEK_SET);
540	res = write (fd, buf, count);
541	lseek (fd, offset, SEEK_SET);
542	pthread_mutex_unlock (&preadwritelock);
543
544	return res;
545	}
546	#endif
547
548	#if !HAVE_FDATASYNC
549	# define fdatasync fsync
550	#endif
551
552	#if !HAVE_READAHEAD
553	# define readahead aio_readahead
554
555	static ssize_t readahead (int fd, off_t offset, size_t count)
556	{
557	char readahead_buf[4096];
558
559	while (count > 0)
560	{
561	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
562
563	pread (fd, readahead_buf, len, offset);
564	offset += len;
565	count -= len;
566	}
567
568	errno = 0;
569	}
570	#endif
571
572	#if !HAVE_READDIR_R
573	# define readdir_r aio_readdir_r
574
575	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
576
577	static int readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
578	{
579	struct dirent *e;
580	int errorno;
581
582	pthread_mutex_lock (&readdirlock);
583
584	e = readdir (dirp);
585	errorno = errno;
586
587	if (e)
588	{
589	*res = ent;
590	strcpy (ent->d_name, e->d_name);
591	}
592	else
593	*res = 0;
594
595	pthread_mutex_unlock (&readdirlock);
596
597	errno = errorno;
598	return e ? 0 : -1;
599	}
600	#endif
601
602	/* sendfile always needs emulation */
603	static ssize_t sendfile_ (int ofd, int ifd, off_t offset, size_t count)
604	{
605	ssize_t res;
606
607	if (!count)
608	return 0;
609
610	#if HAVE_SENDFILE
611	# if __linux
612	res = sendfile (ofd, ifd, &offset, count);
613
614	# elif __freebsd
615	/*
616	* Of course, the freebsd sendfile is a dire hack with no thoughts
617	* wasted on making it similar to other I/O functions.
618	*/
619	{
620	off_t sbytes;
621	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
622
623	if (res < 0 && sbytes)
624	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
625	res = sbytes;
626	}
627
628	# elif __hpux
629	res = sendfile (ofd, ifd, offset, count, 0, 0);
630
631	# elif __solaris
632	{
633	struct sendfilevec vec;
634	size_t sbytes;
635
636	vec.sfv_fd = ifd;
637	vec.sfv_flag = 0;
638	vec.sfv_off = offset;
639	vec.sfv_len = count;
640
641	res = sendfilev (ofd, &vec, 1, &sbytes);
642
643	if (res < 0 && sbytes)
644	res = sbytes;
645	}
646
647	# endif
648	#else
649	res = -1;
650	errno = ENOSYS;
651	#endif
652
653	if (res < 0
654	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
655	#if __solaris
656	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
657	#endif
658	)
659	)
660	{
661	/* emulate sendfile. this is a major pain in the ass */
662	char buf[4096];
663	res = 0;
664
665	while (count)
666	{
667	ssize_t cnt;
668
669	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
670
671	if (cnt <= 0)
672	{
673	if (cnt && !res) res = -1;
674	break;
675	}
676
677	cnt = write (ofd, buf, cnt);
678
679	if (cnt <= 0)
680	{
681	if (cnt && !res) res = -1;
682	break;
683	}
684
685	offset += cnt;
686	res += cnt;
687	count -= cnt;
688	}
689	}
690
691	return res;
692	}
693
694	/* read a full directory */
695	static int scandir_ (const char *path, void **namesp)
696	{
697	DIR *dirp = opendir (path);
698	union
699	{
700	struct dirent d;
701	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
702	} u;
703	struct dirent *entp;
704	char *name, *names;
705	int memlen = 4096;
706	int memofs = 0;
707	int res = 0;
708	int errorno;
709
710	if (!dirp)
711	return -1;
712
713	names = malloc (memlen);
714
715	for (;;)
716	{
717	errno = 0, readdir_r (dirp, &u.d, &entp);
718
719	if (!entp)
720	break;
721
722	name = entp->d_name;
723
724	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
725	{
726	int len = strlen (name) + 1;
727
728	res++;
729
730	while (memofs + len > memlen)
731	{
732	memlen *= 2;
733	names = realloc (names, memlen);
734	if (!names)
735	break;
736	}
737
738	memcpy (names + memofs, name, len);
739	memofs += len;
740	}
741	}
742
743	errorno = errno;
744	closedir (dirp);
745
746	if (errorno)
747	{
748	free (names);
749	errno = errorno;
750	res = -1;
751	}
752
753	*namesp = (void *)names;
754	return res;
755	}
756
757	/*****************************************************************************/
758
759	static void *aio_proc (void *thr_arg)
760	{
761	aio_req req;
762	int type;
763
764	do
765	{
766	pthread_mutex_lock (&reqlock);
767
768	for (;;)
769	{
770	req = reqs;
771
772	if (reqs)
773	{
774	reqs = reqs->next;
775	if (!reqs) reqe = 0;
776	}
777
778	if (req)
779	break;
780
781	pthread_cond_wait (&reqwait, &reqlock);
782	}
783
784	pthread_mutex_unlock (&reqlock);
785
786	errno = 0; /* strictly unnecessary */
787
788	if (!req->cancelled)
789	switch (type = req->type) /* remember type for QUIT check */
790	{
791	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
792	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
793
794	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
795	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
796
797	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
798	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
799	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
800
801	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
802	case REQ_CLOSE: req->result = close (req->fd); break;
803	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
804	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
805	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
806	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
807	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
808
809	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
810	case REQ_FSYNC: req->result = fsync (req->fd); break;
811	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
812
813	case REQ_SLEEP:
814	{
815	struct timeval tv;
816
817	tv.tv_sec = req->fd;
818	tv.tv_usec = req->fd2;
819
820	req->result = select (0, 0, 0, 0, &tv);
821	}
822
823	case REQ_QUIT:
824	break;
825
826	default:
827	req->result = ENOSYS;
828	break;
829	}
830
831	req->errorno = errno;
832
833	pthread_mutex_lock (&reslock);
834
835	req->next = 0;
836
837	if (rese)
838	{
839	rese->next = req;
840	rese = req;
841	}
842	else
843	{
844	rese = ress = req;
845
846	/* write a dummy byte to the pipe so fh becomes ready */
847	write (respipe [1], &respipe, 1);
848	}
849
850	pthread_mutex_unlock (&reslock);
851	}
852	while (type != REQ_QUIT);
853
854	return 0;
855	}
856
857	/*****************************************************************************/
858
859	static void atfork_prepare (void)
860	{
861	pthread_mutex_lock (&reqlock);
862	pthread_mutex_lock (&reslock);
863	#if !HAVE_PREADWRITE
864	pthread_mutex_lock (&preadwritelock);
865	#endif
866	#if !HAVE_READDIR_R
867	pthread_mutex_lock (&readdirlock);
868	#endif
869	}
870
871	static void atfork_parent (void)
872	{
873	#if !HAVE_READDIR_R
874	pthread_mutex_unlock (&readdirlock);
875	#endif
876	#if !HAVE_PREADWRITE
877	pthread_mutex_unlock (&preadwritelock);
878	#endif
879	pthread_mutex_unlock (&reslock);
880	pthread_mutex_unlock (&reqlock);
881	}	556	}
882		557
883	static void atfork_child (void)	558	static void atfork_child (void)
884	{	559	{
885	aio_req prv;
886
887	started = 0;
888
889	while (reqs)
890	{
891	prv = reqs;
892	reqs = prv->next;
893	req_free (prv);
894	}
895
896	reqs = reqe = 0;
897
898	while (ress)
899	{
900	prv = ress;
901	ress = prv->next;
902	req_free (prv);
903	}
904
905	ress = rese = 0;
906
907	close (respipe [0]);
908	close (respipe [1]);
909	create_pipe ();	560	create_respipe ();
		561	}
910		562
911	atfork_parent ();	563	static SV *
		564	get_cb (SV *cb_sv)
		565	{
		566	SvGETMAGIC (cb_sv);
		567	return SvOK (cb_sv) ? s_get_cv_croak (cb_sv) : 0;
912	}	568	}
913		569
914	#define dREQ \	570	#define dREQ \
		571	SV *cb_cv; \
915	aio_req req; \	572	aio_req req; \
		573	int req_pri = next_pri; \
		574	next_pri = EIO_PRI_DEFAULT; \
916	\	575	\
917	if (SvOK (callback) && !SvROK (callback)) \	576	cb_cv = get_cb (callback); \
918	croak ("callback must be undef or of reference type"); \
919	\	577	\
920	Newz (0, req, 1, aio_cb); \	578	Newz (0, req, 1, eio_req); \
921	if (!req) \	579	if (!req) \
922	croak ("out of memory during aio_req allocation"); \	580	croak ("out of memory during eio_req allocation"); \
923	\	581	\
924	req->callback = newSVsv (callback)	582	req->callback = SvREFCNT_inc (cb_cv); \
		583	req->pri = req_pri
925		584
926	#define REQ_SEND \	585	#define REQ_SEND \
		586	PUTBACK; \
927	req_send (req); \	587	req_submit (req); \
		588	SPAGAIN; \
928	\	589	\
929	if (GIMME_V != G_VOID) \	590	if (GIMME_V != G_VOID) \
930	XPUSHs (req_sv (req, AIO_REQ_KLASS));	591	XPUSHs (req_sv (req, aio_req_stash));
931		592
932	MODULE = IO::AIO PACKAGE = IO::AIO	593	MODULE = IO::AIO PACKAGE = IO::AIO
933		594
934	PROTOTYPES: ENABLE	595	PROTOTYPES: ENABLE
935		596
936	BOOT:	597	BOOT:
937	{	598	{
		599	static const struct {
		600	const char *name;
		601	IV iv;
		602	} *civ, const_iv[] = {
		603	# define const_iv(name, value) { # name, (IV) value },
		604	# define const_eio(name) { # name, (IV) EIO_ ## name },
		605	const_iv (EXDEV , EXDEV)
		606	const_iv (ENOSYS , ENOSYS)
		607	const_iv (O_RDONLY, O_RDONLY)
		608	const_iv (O_WRONLY, O_WRONLY)
		609	const_iv (O_CREAT , O_CREAT)
		610	const_iv (O_TRUNC , O_TRUNC)
		611	#ifndef _WIN32
		612	const_iv (S_IFIFO , S_IFIFO)
		613	#endif
		614	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		615	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		616	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		617	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		618	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		619	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		620
		621	const_iv (ST_RDONLY , ST_RDONLY)
		622	const_iv (ST_NOSUID , ST_NOSUID)
		623	const_iv (ST_NODEV , ST_NODEV)
		624	const_iv (ST_NOEXEC , ST_NOEXEC)
		625	const_iv (ST_SYNCHRONOUS , ST_SYNCHRONOUS)
		626	const_iv (ST_MANDLOCK , ST_MANDLOCK)
		627	const_iv (ST_WRITE , ST_WRITE)
		628	const_iv (ST_APPEND , ST_APPEND)
		629	const_iv (ST_IMMUTABLE , ST_IMMUTABLE)
		630	const_iv (ST_NOATIME , ST_NOATIME)
		631	const_iv (ST_NODIRATIME , ST_NODIRATIME)
		632	const_iv (ST_RELATIME , ST_RELATIME)
		633
		634	const_eio (MS_ASYNC)
		635	const_eio (MS_INVALIDATE)
		636	const_eio (MS_SYNC)
		637
		638	const_eio (MT_MODIFY)
		639
		640	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		641	const_eio (SYNC_FILE_RANGE_WRITE)
		642	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		643
		644	const_eio (READDIR_DENTS)
		645	const_eio (READDIR_DIRS_FIRST)
		646	const_eio (READDIR_STAT_ORDER)
		647	const_eio (READDIR_FOUND_UNKNOWN)
		648
		649	const_eio (DT_UNKNOWN)
		650	const_eio (DT_FIFO)
		651	const_eio (DT_CHR)
		652	const_eio (DT_DIR)
		653	const_eio (DT_BLK)
		654	const_eio (DT_REG)
		655	const_eio (DT_LNK)
		656	const_eio (DT_SOCK)
		657	const_eio (DT_WHT)
		658	};
		659
938	HV *stash = gv_stashpv ("IO::AIO", 1);	660	aio_stash = gv_stashpv ("IO::AIO" , 1);
939	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));	661	aio_req_stash = gv_stashpv ("IO::AIO::REQ", 1);
940	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));	662	aio_grp_stash = gv_stashpv ("IO::AIO::GRP", 1);
941	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
942		663
		664	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		665	newCONSTSUB (aio_stash, (char *)civ->name, newSViv (civ->iv));
		666
943	create_pipe ();	667	create_respipe ();
944	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
945	}
946		668
		669	if (eio_init (want_poll, done_poll) < 0)
		670	croak ("IO::AIO: unable to initialise eio library");
		671
		672	/* atfork child called in fifo order, so before eio's handler */
		673	X_THREAD_ATFORK (0, 0, atfork_child);
		674	}
		675
947	void	676	void
948	min_parallel (nthreads)	677	max_poll_reqs (int nreqs)
949	int nthreads
950	PROTOTYPE: $	678	PROTOTYPE: $
		679	CODE:
		680	eio_set_max_poll_reqs (nreqs);
951		681
952	void	682	void
953	max_parallel (nthreads)	683	max_poll_time (double nseconds)
954	int nthreads
955	PROTOTYPE: $	684	PROTOTYPE: $
956
957	int
958	max_outstanding (nreqs)
959	int nreqs
960	PROTOTYPE: $
961	CODE:	685	CODE:
962	RETVAL = max_outstanding;	686	eio_set_max_poll_time (nseconds);
		687
		688	void
		689	min_parallel (int nthreads)
		690	PROTOTYPE: $
		691	CODE:
		692	eio_set_min_parallel (nthreads);
		693
		694	void
		695	max_parallel (int nthreads)
		696	PROTOTYPE: $
		697	CODE:
		698	eio_set_max_parallel (nthreads);
		699
		700	void
		701	max_idle (int nthreads)
		702	PROTOTYPE: $
		703	CODE:
		704	eio_set_max_idle (nthreads);
		705
		706	void
		707	max_outstanding (int maxreqs)
		708	PROTOTYPE: $
		709	CODE:
963	max_outstanding = nreqs;	710	max_outstanding = maxreqs;
964		711
965	void	712	void
966	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	713	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
967	SV * pathname
968	int flags
969	int mode
970	SV * callback
971	PROTOTYPE: $$$;$	714	PROTOTYPE: $$$;$
972	PPCODE:	715	PPCODE:
973	{	716	{
974	dREQ;	717	dREQ;
975		718
976	req->type = REQ_OPEN;	719	req->type = EIO_OPEN;
977	req->data = newSVsv (pathname);	720	req->sv1 = newSVsv (pathname);
978	req->dataptr = SvPVbyte_nolen (req->data);	721	req->ptr1 = SvPVbyte_nolen (req->sv1);
979	req->fd = flags;	722	req->int1 = flags;
980	req->mode = mode;	723	req->int2 = mode;
981		724
982	REQ_SEND;	725	REQ_SEND;
983	}	726	}
984		727
985	void	728	void
986	aio_close (fh,callback=&PL_sv_undef)	729	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
987	SV * fh
988	SV * callback
989	PROTOTYPE: $;$	730	PROTOTYPE: $;$
990	ALIAS:	731	ALIAS:
991	aio_close = REQ_CLOSE
992	aio_fsync = REQ_FSYNC	732	aio_fsync = EIO_FSYNC
993	aio_fdatasync = REQ_FDATASYNC	733	aio_fdatasync = EIO_FDATASYNC
994	PPCODE:	734	PPCODE:
995	{	735	{
		736	int fd = s_fileno_croak (fh, 0);
996	dREQ;	737	dREQ;
997		738
998	req->type = ix;	739	req->type = ix;
999	req->fh = newSVsv (fh);	740	req->sv1 = newSVsv (fh);
1000	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	741	req->int1 = fd;
1001		742
1002	REQ_SEND (req);	743	REQ_SEND (req);
1003	}	744	}
1004		745
1005	void	746	void
		747	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		748	PROTOTYPE: $$$$;$
		749	PPCODE:
		750	{
		751	int fd = s_fileno_croak (fh, 0);
		752	dREQ;
		753
		754	req->type = EIO_SYNC_FILE_RANGE;
		755	req->sv1 = newSVsv (fh);
		756	req->int1 = fd;
		757	req->offs = offset;
		758	req->size = nbytes;
		759	req->int2 = flags;
		760
		761	REQ_SEND (req);
		762	}
		763
		764	void
		765	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		766	PROTOTYPE: $;$
		767	PPCODE:
		768	{
		769	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		770	int fd = s_fileno_croak (fh, 0);
		771	dREQ;
		772
		773	if (close_pipe < 0)
		774	{
		775	int pipefd [2];
		776
		777	if (pipe (pipefd) < 0
		778	|| close (pipefd [1]) < 0
		779	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		780	abort (); /*D*/
		781
		782	close_pipe = pipefd [0];
		783	}
		784
		785	req->type = EIO_DUP2;
		786	req->int1 = close_pipe;
		787	req->sv2 = newSVsv (fh);
		788	req->int2 = fd;
		789
		790	REQ_SEND (req);
		791	}
		792
		793	void
1006	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	794	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
1007	SV * fh
1008	UV offset
1009	UV length
1010	SV * data
1011	UV dataoffset
1012	SV * callback
1013	ALIAS:	795	ALIAS:
1014	aio_read = REQ_READ	796	aio_read = EIO_READ
1015	aio_write = REQ_WRITE	797	aio_write = EIO_WRITE
1016	PROTOTYPE: $$$$$;$	798	PROTOTYPE: $$$$$;$
1017	PPCODE:	799	PPCODE:
1018	{	800	{
1019	aio_req req;
1020	STRLEN svlen;	801	STRLEN svlen;
		802	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
1021	char *svptr = SvPVbyte (data, svlen);	803	char *svptr = SvPVbyte (data, svlen);
1022		804	UV len = SvUV (length);
1023	SvUPGRADE (data, SVt_PV);
1024	SvPOK_on (data);
1025		805
1026	if (dataoffset < 0)	806	if (dataoffset < 0)
1027	dataoffset += svlen;	807	dataoffset += svlen;
1028		808
1029	if (dataoffset < 0 || dataoffset > svlen)	809	if (dataoffset < 0 || dataoffset > svlen)
1030	croak ("data offset outside of string");	810	croak ("dataoffset outside of data scalar");
1031		811
1032	if (ix == REQ_WRITE)	812	if (ix == EIO_WRITE)
1033	{	813	{
1034	/* write: check length and adjust. */	814	/* write: check length and adjust. */
1035	if (length < 0 || length + dataoffset > svlen)	815	if (!SvOK (length) || len + dataoffset > svlen)
1036	length = svlen - dataoffset;	816	len = svlen - dataoffset;
1037	}	817	}
1038	else	818	else
1039	{	819	{
1040	/* read: grow scalar as necessary */	820	/* read: check type and grow scalar as necessary */
		821	SvUPGRADE (data, SVt_PV);
1041	svptr = SvGROW (data, length + dataoffset);	822	svptr = SvGROW (data, len + dataoffset + 1);
1042	}	823	}
1043
1044	if (length < 0)
1045	croak ("length must not be negative");
1046		824
1047	{	825	{
1048	dREQ;	826	dREQ;
1049		827
1050	req->type = ix;	828	req->type = ix;
1051	req->fh = newSVsv (fh);	829	req->sv1 = newSVsv (fh);
1052	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	830	req->int1 = fd;
1053	: IoOFP (sv_2io (fh)));	831	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
1054	req->offset = offset;	832	req->size = len;
1055	req->length = length;
1056	req->data = SvREFCNT_inc (data);	833	req->sv2 = SvREFCNT_inc (data);
1057	req->dataptr = (char *)svptr + dataoffset;	834	req->ptr2 = (char *)svptr + dataoffset;
		835	req->stroffset = dataoffset;
1058		836
1059	if (!SvREADONLY (data))	837	if (!SvREADONLY (data))
1060	{	838	{
1061	SvREADONLY_on (data);	839	SvREADONLY_on (data);
1062	req->data2ptr = (void *)data;	840	req->flags |= FLAG_SV2_RO_OFF;
1063	}	841	}
1064		842
1065	REQ_SEND;	843	REQ_SEND;
1066	}	844	}
1067	}	845	}
1068		846
1069	void	847	void
		848	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		849	PROTOTYPE: $$;$
		850	PPCODE:
		851	{
		852	SV *data;
		853	dREQ;
		854
		855	req->type = EIO_READLINK;
		856	req->sv1 = newSVsv (path);
		857	req->ptr1 = SvPVbyte_nolen (req->sv1);
		858
		859	REQ_SEND;
		860	}
		861
		862	void
1070	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	863	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
1071	SV * out_fh
1072	SV * in_fh
1073	UV in_offset
1074	UV length
1075	SV * callback
1076	PROTOTYPE: $$$$;$	864	PROTOTYPE: $$$$;$
1077	PPCODE:	865	PPCODE:
1078	{	866	{
		867	int ifd = s_fileno_croak (in_fh , 0);
		868	int ofd = s_fileno_croak (out_fh, 1);
1079	dREQ;	869	dREQ;
1080		870
1081	req->type = REQ_SENDFILE;	871	req->type = EIO_SENDFILE;
1082	req->fh = newSVsv (out_fh);	872	req->sv1 = newSVsv (out_fh);
1083	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	873	req->int1 = ofd;
1084	req->fh2 = newSVsv (in_fh);	874	req->sv2 = newSVsv (in_fh);
1085	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	875	req->int2 = ifd;
1086	req->offset = in_offset;	876	req->offs = in_offset;
1087	req->length = length;	877	req->size = length;
1088		878
1089	REQ_SEND;	879	REQ_SEND;
1090	}	880	}
1091		881
1092	void	882	void
1093	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	883	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
1094	SV * fh
1095	UV offset
1096	IV length
1097	SV * callback
1098	PROTOTYPE: $$$;$	884	PROTOTYPE: $$$;$
1099	PPCODE:	885	PPCODE:
1100	{	886	{
		887	int fd = s_fileno_croak (fh, 0);
1101	dREQ;	888	dREQ;
1102		889
1103	req->type = REQ_READAHEAD;	890	req->type = EIO_READAHEAD;
1104	req->fh = newSVsv (fh);	891	req->sv1 = newSVsv (fh);
1105	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	892	req->int1 = fd;
1106	req->offset = offset;	893	req->offs = offset;
1107	req->length = length;	894	req->size = length;
1108		895
1109	REQ_SEND;	896	REQ_SEND;
1110	}	897	}
1111		898
1112	void	899	void
1113	aio_stat (fh_or_path,callback=&PL_sv_undef)	900	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1114	SV * fh_or_path
1115	SV * callback
1116	ALIAS:	901	ALIAS:
1117	aio_stat = REQ_STAT	902	aio_stat = EIO_STAT
1118	aio_lstat = REQ_LSTAT	903	aio_lstat = EIO_LSTAT
		904	aio_statvfs = EIO_STATVFS
1119	PPCODE:	905	PPCODE:
1120	{	906	{
1121	dREQ;	907	dREQ;
1122		908
1123	New (0, req->statdata, 1, Stat_t);	909	req->sv1 = newSVsv (fh_or_path);
1124	if (!req->statdata)
1125	{
1126	req_free (req);
1127	croak ("out of memory during aio_req->statdata allocation");
1128	}
1129		910
1130	if (SvPOK (fh_or_path))	911	if (SvPOK (req->sv1))
1131	{	912	{
1132	req->type = ix;	913	req->type = ix;
1133	req->data = newSVsv (fh_or_path);
1134	req->dataptr = SvPVbyte_nolen (req->data);	914	req->ptr1 = SvPVbyte_nolen (req->sv1);
1135	}	915	}
1136	else	916	else
1137	{	917	{
1138	req->type = REQ_FSTAT;	918	req->type = ix == EIO_STATVFS ? EIO_FSTATVFS : EIO_FSTAT;
1139	req->fh = newSVsv (fh_or_path);
1140	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	919	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1141	}	920	}
1142		921
1143	REQ_SEND;	922	REQ_SEND;
1144	}	923	}
1145		924
1146	void	925	void
		926	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		927	PPCODE:
		928	{
		929	dREQ;
		930
		931	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		932	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		933	req->sv1 = newSVsv (fh_or_path);
		934
		935	if (SvPOK (req->sv1))
		936	{
		937	req->type = EIO_UTIME;
		938	req->ptr1 = SvPVbyte_nolen (req->sv1);
		939	}
		940	else
		941	{
		942	req->type = EIO_FUTIME;
		943	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		944	}
		945
		946	REQ_SEND;
		947	}
		948
		949	void
		950	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		951	PPCODE:
		952	{
		953	dREQ;
		954
		955	req->sv1 = newSVsv (fh_or_path);
		956	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		957
		958	if (SvPOK (req->sv1))
		959	{
		960	req->type = EIO_TRUNCATE;
		961	req->ptr1 = SvPVbyte_nolen (req->sv1);
		962	}
		963	else
		964	{
		965	req->type = EIO_FTRUNCATE;
		966	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		967	}
		968
		969	REQ_SEND;
		970	}
		971
		972	void
		973	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		974	ALIAS:
		975	aio_chmod = EIO_CHMOD
		976	aio_mkdir = EIO_MKDIR
		977	PPCODE:
		978	{
		979	dREQ;
		980
		981	req->int2 = mode;
		982	req->sv1 = newSVsv (fh_or_path);
		983
		984	if (SvPOK (req->sv1))
		985	{
		986	req->type = ix;
		987	req->ptr1 = SvPVbyte_nolen (req->sv1);
		988	}
		989	else
		990	{
		991	req->type = EIO_FCHMOD;
		992	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		993	}
		994
		995	REQ_SEND;
		996	}
		997
		998	void
		999	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		1000	PPCODE:
		1001	{
		1002	dREQ;
		1003
		1004	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		1005	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		1006	req->sv1 = newSVsv (fh_or_path);
		1007
		1008	if (SvPOK (req->sv1))
		1009	{
		1010	req->type = EIO_CHOWN;
		1011	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1012	}
		1013	else
		1014	{
		1015	req->type = EIO_FCHOWN;
		1016	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		1017	}
		1018
		1019	REQ_SEND;
		1020	}
		1021
		1022	void
		1023	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		1024	PPCODE:
		1025	{
		1026	dREQ;
		1027
		1028	req->type = EIO_READDIR;
		1029	req->sv1 = newSVsv (pathname);
		1030	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1031	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1032
		1033	if (flags & EIO_READDIR_DENTS)
		1034	req->int1 |= EIO_READDIR_CUSTOM2;
		1035
		1036	REQ_SEND;
		1037	}
		1038
		1039	void
1147	aio_unlink (pathname,callback=&PL_sv_undef)	1040	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1148	SV * pathname
1149	SV * callback
1150	ALIAS:	1041	ALIAS:
1151	aio_unlink = REQ_UNLINK	1042	aio_unlink = EIO_UNLINK
1152	aio_rmdir = REQ_RMDIR	1043	aio_rmdir = EIO_RMDIR
1153	aio_readdir = REQ_READDIR	1044	aio_readdir = EIO_READDIR
1154	PPCODE:	1045	PPCODE:
1155	{	1046	{
1156	dREQ;	1047	dREQ;
1157		1048
1158	req->type = ix;	1049	req->type = ix;
1159	req->data = newSVsv (pathname);	1050	req->sv1 = newSVsv (pathname);
1160	req->dataptr = SvPVbyte_nolen (req->data);	1051	req->ptr1 = SvPVbyte_nolen (req->sv1);
1161		1052
1162	REQ_SEND;	1053	REQ_SEND;
1163	}	1054	}
1164		1055
1165	void	1056	void
1166	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1057	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1167	SV * oldpath
1168	SV * newpath
1169	SV * callback
1170	ALIAS:	1058	ALIAS:
1171	aio_link = REQ_LINK	1059	aio_link = EIO_LINK
1172	aio_symlink = REQ_SYMLINK	1060	aio_symlink = EIO_SYMLINK
1173	aio_rename = REQ_RENAME	1061	aio_rename = EIO_RENAME
1174	PPCODE:	1062	PPCODE:
1175	{	1063	{
1176	dREQ;	1064	dREQ;
1177		1065
1178	req->type = ix;	1066	req->type = ix;
1179	req->fh = newSVsv (oldpath);	1067	req->sv1 = newSVsv (oldpath);
1180	req->data2ptr = SvPVbyte_nolen (req->fh);	1068	req->ptr1 = SvPVbyte_nolen (req->sv1);
1181	req->data = newSVsv (newpath);	1069	req->sv2 = newSVsv (newpath);
1182	req->dataptr = SvPVbyte_nolen (req->data);	1070	req->ptr2 = SvPVbyte_nolen (req->sv2);
1183		1071
1184	REQ_SEND;	1072	REQ_SEND;
1185	}	1073	}
1186		1074
1187	void	1075	void
1188	aio_sleep (delay,callback=&PL_sv_undef)	1076	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
1189	double delay
1190	SV * callback
1191	PPCODE:	1077	PPCODE:
1192	{	1078	{
1193	dREQ;	1079	dREQ;
1194		1080
1195	req->type = REQ_SLEEP;	1081	req->type = EIO_MKNOD;
1196	req->fd = delay < 0. ? 0 : delay;	1082	req->sv1 = newSVsv (pathname);
1197	req->fd2 = delay < 0. ? 0 : 1000. * (delay - req->fd);	1083	req->ptr1 = SvPVbyte_nolen (req->sv1);
1198		1084	req->int2 = (mode_t)mode;
		1085	req->offs = dev;
		1086
1199	REQ_SEND;	1087	REQ_SEND;
1200	}	1088	}
1201		1089
1202	void	1090	void
		1091	aio_mtouch (SV8 *data, IV offset = 0, SV *length = &PL_sv_undef, int flags = 0, SV *callback=&PL_sv_undef)
		1092	ALIAS:
		1093	aio_mtouch = EIO_MTOUCH
		1094	aio_msync = EIO_MSYNC
		1095	PROTOTYPE: $$$$;$
		1096	PPCODE:
		1097	{
		1098	STRLEN svlen;
		1099	UV len = SvUV (length);
		1100	char *svptr = SvPVbyte (data, svlen);
		1101
		1102	if (offset < 0)
		1103	offset += svlen;
		1104
		1105	if (offset < 0 || offset > svlen)
		1106	croak ("offset outside of scalar");
		1107
		1108	if (!SvOK (length) || len + offset > svlen)
		1109	len = svlen - offset;
		1110
		1111	{
		1112	dREQ;
		1113
		1114	req->type = ix;
		1115	req->size = len;
		1116	req->sv2 = SvREFCNT_inc (data);
		1117	req->ptr2 = (char *)svptr + offset;
		1118	req->int1 = flags;
		1119
		1120	REQ_SEND;
		1121	}
		1122	}
		1123
		1124	void
		1125	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1126	PPCODE:
		1127	{
		1128	dREQ;
		1129
		1130	req->type = EIO_BUSY;
		1131	req->nv1 = delay < 0. ? 0. : delay;
		1132
		1133	REQ_SEND;
		1134	}
		1135
		1136	void
1203	aio_group (callback=&PL_sv_undef)	1137	aio_group (SV *callback=&PL_sv_undef)
1204	SV * callback
1205	PROTOTYPE: ;$	1138	PROTOTYPE: ;$
1206	PPCODE:	1139	PPCODE:
1207	{	1140	{
1208	dREQ;	1141	dREQ;
		1142
1209	req->type = REQ_GROUP;	1143	req->type = EIO_GROUP;
		1144
1210	req_send (req);	1145	req_submit (req);
1211	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1146	XPUSHs (req_sv (req, aio_grp_stash));
1212	}	1147	}
		1148
		1149	void
		1150	aio_nop (SV *callback=&PL_sv_undef)
		1151	ALIAS:
		1152	aio_nop = EIO_NOP
		1153	aio_sync = EIO_SYNC
		1154	PPCODE:
		1155	{
		1156	dREQ;
		1157
		1158	req->type = ix;
		1159
		1160	REQ_SEND;
		1161	}
		1162
		1163	int
		1164	aioreq_pri (int pri = 0)
		1165	PROTOTYPE: ;$
		1166	CODE:
		1167	RETVAL = next_pri;
		1168	if (items > 0)
		1169	{
		1170	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1171	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1172	next_pri = pri;
		1173	}
		1174	OUTPUT:
		1175	RETVAL
		1176
		1177	void
		1178	aioreq_nice (int nice = 0)
		1179	CODE:
		1180	nice = next_pri - nice;
		1181	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1182	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1183	next_pri = nice;
1213		1184
1214	void	1185	void
1215	flush ()	1186	flush ()
1216	PROTOTYPE:	1187	PROTOTYPE:
1217	CODE:	1188	CODE:
1218	while (nreqs)	1189	while (eio_nreqs ())
1219	{	1190	{
1220	poll_wait ();	1191	poll_wait ();
1221	poll_cb ();	1192	poll_cb ();
1222	}	1193	}
1223		1194
1224	void	1195	int
1225	poll()	1196	poll()
1226	PROTOTYPE:	1197	PROTOTYPE:
1227	CODE:	1198	CODE:
1228	if (nreqs)
1229	{
1230	poll_wait ();	1199	poll_wait ();
1231	poll_cb ();	1200	RETVAL = poll_cb ();
1232	}	1201	OUTPUT:
		1202	RETVAL
1233		1203
1234	int	1204	int
1235	poll_fileno()	1205	poll_fileno()
1236	PROTOTYPE:	1206	PROTOTYPE:
1237	CODE:	1207	CODE:
1238	RETVAL = respipe [0];	1208	RETVAL = s_epipe_fd (&respipe);
1239	OUTPUT:	1209	OUTPUT:
1240	RETVAL	1210	RETVAL
1241		1211
1242	int	1212	int
1243	poll_cb(...)	1213	poll_cb(...)
…		…
1249		1219
1250	void	1220	void
1251	poll_wait()	1221	poll_wait()
1252	PROTOTYPE:	1222	PROTOTYPE:
1253	CODE:	1223	CODE:
1254	if (nreqs)
1255	poll_wait ();	1224	poll_wait ();
1256		1225
1257	int	1226	int
1258	nreqs()	1227	nreqs()
1259	PROTOTYPE:	1228	PROTOTYPE:
1260	CODE:	1229	CODE:
1261	RETVAL = nreqs;	1230	RETVAL = eio_nreqs ();
1262	OUTPUT:	1231	OUTPUT:
1263	RETVAL	1232	RETVAL
1264		1233
		1234	int
		1235	nready()
		1236	PROTOTYPE:
		1237	CODE:
		1238	RETVAL = eio_nready ();
		1239	OUTPUT:
		1240	RETVAL
		1241
		1242	int
		1243	npending()
		1244	PROTOTYPE:
		1245	CODE:
		1246	RETVAL = eio_npending ();
		1247	OUTPUT:
		1248	RETVAL
		1249
		1250	int
		1251	nthreads()
		1252	PROTOTYPE:
		1253	CODE:
		1254	RETVAL = eio_nthreads ();
		1255	OUTPUT:
		1256	RETVAL
		1257
		1258	int
		1259	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1260	PROTOTYPE: $$$$
		1261	CODE:
		1262	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1263	RETVAL = posix_fadvise (fh, offset, length, advice);
		1264	#else
		1265	RETVAL = errno = ENOSYS;
		1266	#endif
		1267	OUTPUT:
		1268	RETVAL
		1269
		1270	ssize_t
		1271	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1272	PROTOTYPE: $$$$
		1273	CODE:
		1274	RETVAL = eio_sendfile_sync (ofh, ifh, offset, count);
		1275	OUTPUT:
		1276	RETVAL
		1277
		1278	void _on_next_submit (SV *cb)
		1279	CODE:
		1280	SvREFCNT_dec (on_next_submit);
		1281	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1282
1265	PROTOTYPES: DISABLE	1283	PROTOTYPES: DISABLE
1266		1284
1267	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1285	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1268		1286
1269	void	1287	void
1270	cancel (aio_req_ornot req)	1288	cancel (aio_req_ornot req)
1271	PROTOTYPE:
1272	CODE:	1289	CODE:
1273	req_cancel (req);	1290	eio_cancel (req);
		1291
		1292	void
		1293	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1294	PPCODE:
		1295	{
		1296	if (GIMME_V != G_VOID)
		1297	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1298
		1299	if (items > 1)
		1300	{
		1301	SV *cb_cv =get_cb (callback);
		1302
		1303	SvREFCNT_dec (req->callback);
		1304	req->callback = SvREFCNT_inc (cb_cv);
		1305	}
		1306	}
1274		1307
1275	MODULE = IO::AIO PACKAGE = IO::AIO::GRP	1308	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
1276		1309
1277	void	1310	void
1278	add (aio_req grp, ...)	1311	add (aio_req grp, ...)
1279	PPCODE:	1312	PPCODE:
1280	{	1313	{
1281	int i;	1314	int i;
1282		1315
1283	if (grp->fd == 2)	1316	if (grp->int1 == 2)
1284	croak ("cannot add requests to IO::AIO::GRP after the group finished");	1317	croak ("cannot add requests to IO::AIO::GRP after the group finished");
1285		1318
1286	for (i = 1; i < items; ++i )	1319	for (i = 1; i < items; ++i )
1287	{	1320	{
		1321	aio_req req;
		1322
1288	if (GIMME_V != G_VOID)	1323	if (GIMME_V != G_VOID)
1289	XPUSHs (sv_2mortal (newSVsv (ST (i))));	1324	XPUSHs (sv_2mortal (newSVsv (ST (i))));
1290		1325
1291	aio_req req = SvAIO_REQ (ST (i));	1326	req = SvAIO_REQ (ST (i));
1292		1327
1293	if (req)	1328	if (req)
1294	{	1329	eio_grp_add (grp, req);
1295	++grp->length;
1296	req->grp = grp;
1297
1298	req->grp_prev = 0;
1299	req->grp_next = grp->grp_first;
1300
1301	if (grp->grp_first)
1302	grp->grp_first->grp_prev = req;
1303
1304	grp->grp_first = req;
1305	}	1330	}
1306	}
1307	}	1331	}
		1332
		1333	void
		1334	cancel_subs (aio_req_ornot req)
		1335	CODE:
		1336	req_cancel_subs (req);
1308		1337
1309	void	1338	void
1310	result (aio_req grp, ...)	1339	result (aio_req grp, ...)
1311	CODE:	1340	CODE:
1312	{	1341	{
1313	int i;	1342	int i;
		1343	AV *av;
		1344
		1345	grp->errorno = errno;
		1346
1314	AV *av = newAV ();	1347	av = newAV ();
		1348	av_extend (av, items - 1);
1315		1349
1316	for (i = 1; i < items; ++i )	1350	for (i = 1; i < items; ++i )
1317	av_push (av, newSVsv (ST (i)));	1351	av_push (av, newSVsv (ST (i)));
1318		1352
1319	SvREFCNT_dec (grp->data);	1353	SvREFCNT_dec (grp->sv1);
1320	grp->data = (SV *)av;	1354	grp->sv1 = (SV *)av;
1321	}	1355	}
1322		1356
1323	void	1357	void
1324	lock (aio_req grp)	1358	errno (aio_req grp, int errorno = errno)
1325	CODE:	1359	CODE:
1326	++grp->length;	1360	grp->errorno = errorno;
1327		1361
1328	void	1362	void
1329	unlock (aio_req grp)
1330	CODE:
1331	aio_grp_dec (grp);
1332
1333	void
1334	feeder_limit (aio_req grp, int limit)	1363	limit (aio_req grp, int limit)
1335	CODE:	1364	CODE:
1336	grp->fd2 = limit;	1365	eio_grp_limit (grp, limit);
1337	aio_grp_feed (grp);
1338		1366
1339	void	1367	void
1340	set_feeder (aio_req grp, SV *callback=&PL_sv_undef)	1368	feed (aio_req grp, SV *callback=&PL_sv_undef)
1341	CODE:	1369	CODE:
1342	{	1370	{
1343	SvREFCNT_dec (grp->fh2);	1371	SvREFCNT_dec (grp->sv2);
1344	grp->fh2 = newSVsv (callback);	1372	grp->sv2 = newSVsv (callback);
		1373	grp->feed = aio_grp_feed;
1345		1374
1346	if (grp->fd2 <= 0)	1375	if (grp->int2 <= 0)
1347	grp->fd2 = 2;	1376	grp->int2 = 2;
1348		1377
1349	aio_grp_feed (grp);	1378	eio_grp_limit (grp, grp->int2);
1350	}	1379	}
1351		1380

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