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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.41 by root, Sat Jun 24 19:14:04 2006 UTC vs.
Revision 1.151 by root, Tue Jul 14 00:13:36 2009 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/types.h>	14	#include <sys/types.h>
15	#include <sys/stat.h>	15	#include <sys/stat.h>
16	#include <limits.h>	16	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	17	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	18	#include <sched.h>
21		19
22	#if HAVE_SENDFILE	20	/* perl namespace pollution */
23	# if __linux	21	#undef VERSION
24	# include <sys/sendfile.h>	22
25	# elif __freebsd	23	#ifdef _WIN32
26	# include <sys/socket.h>	24
27	# include <sys/uio.h>	25	# define EIO_STRUCT_DIRENT Direntry_t
28	# elif __hpux	26	# undef malloc
29	# include <sys/socket.h>	27	# undef free
30	# elif __solaris /* not yet */	28
31	# include <sys/sendfile.h>	29	// perl overrides all those nice win32 functions
		30	# undef open
		31	# undef read
		32	# undef write
		33	# undef send
		34	# undef recv
		35	# undef stat
		36	# undef fstat
		37	# define lstat stat
		38	# undef truncate
		39	# undef ftruncate
		40	# undef open
		41	# undef close
		42	# undef unlink
		43	# undef rmdir
		44	# undef rename
		45	# undef lseek
		46
		47	# define chown(a,b,c) (errno = ENOSYS, -1)
		48	# define fchown(a,b,c) (errno = ENOSYS, -1)
		49	# define fchmod(a,b) (errno = ENOSYS, -1)
		50	# define symlink(a,b) (errno = ENOSYS, -1)
		51	# define readlink(a,b,c) (errno = ENOSYS, -1)
		52	# define mknod(a,b,c) (errno = ENOSYS, -1)
		53	# define truncate(a,b) (errno = ENOSYS, -1)
		54	# define ftruncate(fd,o) chsize ((fd), (o))
		55	# define fsync(fd) _commit (fd)
		56	# define opendir(fd) (errno = ENOSYS, 0)
		57	# define readdir(fd) (errno = ENOSYS, -1)
		58	# define closedir(fd) (errno = ENOSYS, -1)
		59	# define mkdir(a,b) mkdir (a)
		60
32	# else	61	#else
33	# error sendfile support requested but not available	62
34	# endif	63	# include <sys/time.h>
		64	# include <sys/select.h>
		65	# include <unistd.h>
		66	# include <utime.h>
		67	# include <signal.h>
		68	# define EIO_STRUCT_DIRENT struct dirent
		69
35	#endif	70	#endif
36		71
37	/* used for struct dirent, AIX doesn't provide it */	72	/* perl stupidly overrides readdir and maybe others */
38	#ifndef NAME_MAX	73	/* with thread-unsafe versions, imagine that :( */
39	# define NAME_MAX 4096	74	#undef readdir
		75	#undef opendir
		76	#undef closedir
		77
		78	#define EIO_STRUCT_STAT Stat_t
		79
		80	/* use NV for 32 bit perls as it allows larger offsets */
		81	#if IVSIZE >= 8
		82	# define VAL64 IV
		83	# define SvVAL64 SvIV
		84	# define newSVval64 newSViv
		85	#else
		86	# define VAL64 NV
		87	# define SvVAL64 SvNV
		88	# define newSVval64 newSVnv
40	#endif	89	#endif
41		90
42	#if __ia64	91	/*****************************************************************************/
43	# define STACKSIZE 65536	92
		93	#if __GNUC__ >= 3
		94	# define expect(expr,value) __builtin_expect ((expr),(value))
44	#else	95	#else
45	# define STACKSIZE 8192	96	# define expect(expr,value) (expr)
46	#endif	97	#endif
47		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
48	enum {	152	enum {
49	REQ_QUIT,	153	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
50	REQ_OPEN, REQ_CLOSE,
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,
52	REQ_SENDFILE,
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,
54	REQ_FSYNC, REQ_FDATASYNC,
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,
56	REQ_READDIR,
57	REQ_LINK, REQ_SYMLINK,
58	};	154	};
59		155
60	typedef struct aio_cb {	156	#include "libeio/eio.c"
61	struct aio_cb *volatile next;
62		157
63	int type;
64
65	/* should receive a cleanup, with unions */
66	int fd, fd2;
67	off_t offset;
68	size_t length;
69	ssize_t result;
70	mode_t mode; /* open */
71	int errorno;
72	SV *data, *callback;
73	SV *fh, *fh2;
74	void *dataptr, *data2ptr;
75	STRLEN dataoffset;
76
77	Stat_t *statdata;
78	} aio_cb;
79
80	typedef aio_cb *aio_req;	158	typedef eio_req *aio_req;
		159	typedef eio_req *aio_req_ornot;
81		160
82	static int started, wanted;	161	static SV *on_next_submit;
83	static volatile int nreqs;	162	static int next_pri = EIO_PRI_DEFAULT;
84	static int max_outstanding = 1<<30;	163	static int max_outstanding;
85	static int respipe [2];
86		164
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	165	static int respipe_osf [2], respipe [2] = { -1, -1 };
88	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
89	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
90		166
91	static volatile aio_req reqs, reqe; /* queue start, queue end */	167	static void req_destroy (aio_req req);
92	static volatile aio_req ress, rese; /* queue start, queue end */
93
94	static void free_req (aio_req req)	168	static void req_cancel (aio_req req);
95	{
96	if (req->data)
97	SvREFCNT_dec (req->data);
98		169
		170	static void want_poll (void)
		171	{
		172	/* write a dummy byte to the pipe so fh becomes ready */
		173	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		174	}
		175
		176	static void done_poll (void)
		177	{
		178	/* read any signals sent by the worker threads */
		179	char buf [4];
		180	while (respipe_read (respipe [0], buf, 4) == 4)
		181	;
		182	}
		183
		184	/* must be called at most once */
		185	static SV *req_sv (aio_req req, const char *klass)
		186	{
		187	if (!req->self)
		188	{
		189	req->self = (SV *)newHV ();
		190	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		191	}
		192
		193	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		194	}
		195
		196	static aio_req SvAIO_REQ (SV *sv)
		197	{
		198	MAGIC *mg;
		199
		200	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		201	croak ("object of class " AIO_REQ_KLASS " expected");
		202
		203	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		204
		205	return mg ? (aio_req)mg->mg_ptr : 0;
		206	}
		207
		208	static void aio_grp_feed (aio_req grp)
		209	{
		210	if (grp->sv2 && SvOK (grp->sv2))
		211	{
		212	dSP;
		213
		214	ENTER;
		215	SAVETMPS;
		216	PUSHMARK (SP);
		217	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		218	PUTBACK;
		219	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		220	SPAGAIN;
		221	FREETMPS;
		222	LEAVE;
		223	}
		224	}
		225
		226	static void req_submit (eio_req *req)
		227	{
		228	eio_submit (req);
		229
		230	if (expect_false (on_next_submit))
		231	{
		232	dSP;
		233	SV *cb = sv_2mortal (on_next_submit);
		234
		235	on_next_submit = 0;
		236
		237	PUSHMARK (SP);
		238	PUTBACK;
		239	call_sv (cb, G_DISCARD | G_EVAL);
		240	}
		241	}
		242
		243	static int req_invoke (eio_req *req)
		244	{
		245	dSP;
		246
		247	if (req->flags & FLAG_SV2_RO_OFF)
		248	SvREADONLY_off (req->sv2);
		249
		250	if (!EIO_CANCELLED (req) && req->callback)
		251	{
		252	ENTER;
		253	SAVETMPS;
		254	PUSHMARK (SP);
		255	EXTEND (SP, 1);
		256
		257	switch (req->type)
		258	{
		259	case EIO_READDIR:
		260	{
		261	SV *rv = &PL_sv_undef;
		262
		263	if (req->result >= 0)
		264	{
		265	int i;
		266	char *names = (char *)req->ptr2;
		267	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		268	AV *av = newAV ();
		269
		270	av_extend (av, req->result - 1);
		271
		272	for (i = 0; i < req->result; ++i)
		273	{
		274	if (req->int1 & EIO_READDIR_DENTS)
		275	{
		276	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		277
		278	if (req->int1 & EIO_READDIR_CUSTOM2)
		279	{
		280	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		281	AV *avent = newAV ();
		282
		283	av_extend (avent, 2);
		284
		285	if (!sv_type [ent->type])
		286	{
		287	sv_type [ent->type] = newSViv (ent->type);
		288	SvREADONLY_on (sv_type [ent->type]);
		289	}
		290
		291	av_store (avent, 0, namesv);
		292	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		293	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		294
		295	av_store (av, i, newRV_noinc ((SV *)avent));
		296	}
		297	else
		298	av_store (av, i, namesv);
		299
		300	++ent;
		301	}
		302	else
		303	{
		304	SV *name = newSVpv (names, 0);
		305	av_store (av, i, name);
		306	names += SvCUR (name) + 1;
		307	}
		308	}
		309
		310	rv = sv_2mortal (newRV_noinc ((SV *)av));
		311	}
		312
		313	PUSHs (rv);
		314
		315	if (req->int1 & EIO_READDIR_CUSTOM1)
		316	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		317	}
		318	break;
		319
		320	case EIO_OPEN:
		321	{
		322	/* convert fd to fh */
		323	SV *fh = &PL_sv_undef;
		324
		325	if (req->result >= 0)
		326	{
		327	GV *gv = (GV *)sv_newmortal ();
		328	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		329	char sym [64];
		330	int symlen;
		331
		332	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		333	gv_init (gv, stash, sym, symlen, 0);
		334
		335	symlen = snprintf (
		336	sym,
		337	sizeof (sym),
		338	"%s&=%d",
		339	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		340	(int)req->result
		341	);
		342
		343	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		344	fh = (SV *)gv;
		345	}
		346
		347	PUSHs (fh);
		348	}
		349	break;
		350
		351	case EIO_GROUP:
		352	req->int1 = 2; /* mark group as finished */
		353
		354	if (req->sv1)
		355	{
		356	int i;
		357	AV *av = (AV *)req->sv1;
		358
		359	EXTEND (SP, AvFILL (av) + 1);
		360	for (i = 0; i <= AvFILL (av); ++i)
		361	PUSHs (*av_fetch (av, i, 0));
		362	}
		363	break;
		364
		365	case EIO_NOP:
		366	case EIO_BUSY:
		367	break;
		368
		369	case EIO_READLINK:
		370	if (req->result > 0)
		371	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		372	break;
		373
		374	case EIO_STAT:
		375	case EIO_LSTAT:
		376	case EIO_FSTAT:
		377	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		378	PL_laststatval = req->result;
		379	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		380	PUSHs (sv_2mortal (newSViv (req->result)));
		381	break;
		382
		383	case EIO_READ:
		384	{
		385	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		386	*SvEND (req->sv2) = 0;
		387	SvPOK_only (req->sv2);
		388	SvSETMAGIC (req->sv2);
		389	PUSHs (sv_2mortal (newSViv (req->result)));
		390	}
		391	break;
		392
		393	case EIO_DUP2:
		394	if (req->result > 0)
		395	req->result = 0;
		396	/* FALLTHROUGH */
		397
		398	default:
		399	PUSHs (sv_2mortal (newSViv (req->result)));
		400	break;
		401	}
		402
		403	errno = req->errorno;
		404
		405	PUTBACK;
		406	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		407	SPAGAIN;
		408
		409	FREETMPS;
		410	LEAVE;
		411
		412	PUTBACK;
		413	}
		414
		415	return !!SvTRUE (ERRSV);
		416	}
		417
		418	static void req_destroy (aio_req req)
		419	{
99	if (req->fh)	420	if (req->self)
		421	{
		422	sv_unmagic (req->self, PERL_MAGIC_ext);
100	SvREFCNT_dec (req->fh);	423	SvREFCNT_dec (req->self);
		424	}
101		425
102	if (req->fh2)	426	SvREFCNT_dec (req->sv1);
103	SvREFCNT_dec (req->fh2);	427	SvREFCNT_dec (req->sv2);
104
105	if (req->statdata)
106	Safefree (req->statdata);
107
108	if (req->callback)
109	SvREFCNT_dec (req->callback);	428	SvREFCNT_dec (req->callback);
110
111	if (req->type == REQ_READDIR && req->result >= 0)
112	free (req->data2ptr);
113		429
114	Safefree (req);	430	Safefree (req);
115	}	431	}
116		432
		433	static void req_cancel_subs (aio_req grp)
		434	{
		435	aio_req sub;
		436
		437	if (grp->type != EIO_GROUP)
		438	return;
		439
		440	SvREFCNT_dec (grp->sv2);
		441	grp->sv2 = 0;
		442
		443	eio_grp_cancel (grp);
		444	}
		445
		446	#ifdef USE_SOCKETS_AS_HANDLES
		447	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		448	#else
		449	# define TO_SOCKET(x) (x)
		450	#endif
		451
117	static void	452	static void
118	poll_wait ()	453	create_respipe (void)
119	{	454	{
120	if (nreqs && !ress)	455	int old_readfd = respipe [0];
		456
		457	if (respipe [1] >= 0)
		458	respipe_close (TO_SOCKET (respipe [1]));
		459
		460	#ifdef _WIN32
		461	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		462	#else
		463	if (pipe (respipe))
		464	#endif
		465	croak ("unable to initialize result pipe");
		466
		467	if (old_readfd >= 0)
121	{	468	{
122	fd_set rfd;	469	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
123	FD_ZERO(&rfd);	470	croak ("unable to initialize result pipe(2)");
124	FD_SET(respipe [0], &rfd);
125		471
126	select (respipe [0] + 1, &rfd, 0, 0, 0);	472	respipe_close (respipe [0]);
		473	respipe [0] = old_readfd;
127	}	474	}
128	}
129		475
130	static int	476	#ifdef _WIN32
131	poll_cb ()	477	int arg = 1;
132	{	478	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
133	dSP;	479	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
134	int count = 0;	480	#else
135	int do_croak = 0;	481	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
136	aio_req req;	482	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		483	#endif
		484	croak ("unable to initialize result pipe(3)");
137		485
		486	respipe_osf [0] = TO_SOCKET (respipe [0]);
		487	respipe_osf [1] = TO_SOCKET (respipe [1]);
		488	}
		489
		490	static void poll_wait (void)
		491	{
		492	fd_set rfd;
		493
		494	while (eio_nreqs ())
		495	{
		496	int size;
		497
		498	X_LOCK (reslock);
		499	size = res_queue.size;
		500	X_UNLOCK (reslock);
		501
		502	if (size)
		503	return;
		504
		505	etp_maybe_start_thread ();
		506
		507	FD_ZERO (&rfd);
		508	FD_SET (respipe [0], &rfd);
		509
		510	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		511	}
		512	}
		513
		514	static int poll_cb (void)
		515	{
138	for (;;)	516	for (;;)
139	{	517	{
140	pthread_mutex_lock (&reslock);	518	int res = eio_poll ();
141	req = ress;
142		519
143	if (req)	520	if (res > 0)
144	{
145	ress = req->next;
146
147	if (!ress)
148	{
149	/* read any signals sent by the worker threads */
150	char buf [32];
151	while (read (respipe [0], buf, 32) == 32)
152	;
153
154	rese = 0;
155	}
156	}
157
158	pthread_mutex_unlock (&reslock);
159
160	if (!req)
161	break;
162
163	nreqs--;
164
165	if (req->type == REQ_QUIT)
166	started--;
167	else
168	{
169	int errorno = errno;
170	errno = req->errorno;
171
172	if (req->type == REQ_READ)
173	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
174
175	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
176	SvREADONLY_off (req->data);
177
178	if (req->statdata)
179	{
180	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
181	PL_laststatval = req->result;
182	PL_statcache = *(req->statdata);
183	}
184
185	ENTER;
186	PUSHMARK (SP);
187
188	if (req->type == REQ_READDIR)
189	{
190	SV *rv = &PL_sv_undef;
191
192	if (req->result >= 0)
193	{
194	char *buf = req->data2ptr;
195	AV *av = newAV ();
196
197	while (req->result)
198	{
199	SV *sv = newSVpv (buf, 0);
200
201	av_push (av, sv);
202	buf += SvCUR (sv) + 1;
203	req->result--;
204	}
205
206	rv = sv_2mortal (newRV_noinc ((SV *)av));
207	}
208
209	XPUSHs (rv);
210	}
211	else
212	{
213	XPUSHs (sv_2mortal (newSViv (req->result)));
214
215	if (req->type == REQ_OPEN)
216	{
217	/* convert fd to fh */
218	SV *fh;
219
220	PUTBACK;
221	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
222	SPAGAIN;
223
224	fh = SvREFCNT_inc (POPs);
225
226	PUSHMARK (SP);
227	XPUSHs (sv_2mortal (fh));
228	}
229	}
230
231	if (SvOK (req->callback))
232	{
233	PUTBACK;
234	call_sv (req->callback, G_VOID | G_EVAL);
235	SPAGAIN;
236
237	if (SvTRUE (ERRSV))
238	{
239	free_req (req);
240	croak (0);	521	croak (0);
241	}
242	}
243		522
244	LEAVE;	523	if (!max_outstanding || max_outstanding > eio_nreqs ())
		524	return res;
245		525
246	errno = errorno;	526	poll_wait ();
247	count++;
248	}
249
250	free_req (req);
251	}	527	}
252
253	return count;
254	}	528	}
255		529
256	static void *aio_proc(void *arg);	530	static void atfork_child (void)
257
258	static void
259	start_thread (void)
260	{	531	{
261	sigset_t fullsigset, oldsigset;	532	create_respipe ();
262	pthread_t tid;
263	pthread_attr_t attr;
264
265	pthread_attr_init (&attr);
266	pthread_attr_setstacksize (&attr, STACKSIZE);
267	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
268
269	sigfillset (&fullsigset);
270	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
271
272	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
273	started++;
274
275	sigprocmask (SIG_SETMASK, &oldsigset, 0);
276	}	533	}
277		534
278	static void	535	static SV *
279	send_req (aio_req req)	536	get_cb (SV *cb_sv)
280	{	537	{
281	while (started < wanted && nreqs >= started)	538	HV *st;
282	start_thread ();	539	GV *gvp;
		540	CV *cv;
283		541
284	nreqs++;	542	if (!SvOK (cb_sv))
		543	return 0;
285		544
286	pthread_mutex_lock (&reqlock);	545	cv = sv_2cv (cb_sv, &st, &gvp, 0);
287		546
288	req->next = 0;	547	if (!cv)
		548	croak ("IO::AIO callback must be undef or a CODE reference");
289		549
290	if (reqe)	550	return (SV *)cv;
291	{
292	reqe->next = req;
293	reqe = req;
294	}
295	else
296	reqe = reqs = req;
297
298	pthread_cond_signal (&reqwait);
299	pthread_mutex_unlock (&reqlock);
300
301	if (nreqs > max_outstanding)
302	for (;;)
303	{
304	poll_cb ();
305
306	if (nreqs <= max_outstanding)
307	break;
308
309	poll_wait ();
310	}
311	}	551	}
312		552
313	static void	553	#define dREQ \
314	end_thread (void)	554	SV *cb_cv; \
315	{
316	aio_req req;	555	aio_req req; \
		556	int req_pri = next_pri; \
		557	next_pri = EIO_PRI_DEFAULT; \
		558	\
		559	cb_cv = get_cb (callback); \
		560	\
317	Newz (0, req, 1, aio_cb);	561	Newz (0, req, 1, eio_req); \
318	req->type = REQ_QUIT;	562	if (!req) \
		563	croak ("out of memory during eio_req allocation"); \
		564	\
		565	req->callback = SvREFCNT_inc (cb_cv); \
		566	req->pri = req_pri
319		567
320	send_req (req);	568	#define REQ_SEND \
321	}	569	PUTBACK; \
		570	req_submit (req); \
		571	SPAGAIN; \
		572	\
		573	if (GIMME_V != G_VOID) \
		574	XPUSHs (req_sv (req, AIO_REQ_KLASS));
322		575
323	static void min_parallel (int nthreads)	576	MODULE = IO::AIO PACKAGE = IO::AIO
324	{
325	if (wanted < nthreads)
326	wanted = nthreads;
327	}
328		577
329	static void max_parallel (int nthreads)	578	PROTOTYPES: ENABLE
330	{
331	int cur = started;
332		579
333	if (wanted > nthreads)	580	BOOT:
334	wanted = nthreads;
335
336	while (cur > wanted)
337	{
338	end_thread ();
339	cur--;
340	}
341
342	while (started > wanted)
343	{
344	poll_wait ();
345	poll_cb ();
346	}
347	}
348
349	static void create_pipe ()
350	{	581	{
351	if (pipe (respipe))	582	static const struct {
352	croak ("unable to initialize result pipe");	583	const char *name;
353		584	IV iv;
354	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))	585	} *civ, const_iv[] = {
355	croak ("cannot set result pipe to nonblocking mode");	586	# define const_iv(name, value) { # name, (IV) value },
356		587	# define const_eio(name) { # name, (IV) EIO_ ## name },
357	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))	588	const_iv (EXDEV , EXDEV)
358	croak ("cannot set result pipe to nonblocking mode");	589	const_iv (ENOSYS , ENOSYS)
359	}	590	const_iv (O_RDONLY, O_RDONLY)
360		591	const_iv (O_WRONLY, O_WRONLY)
361	/*****************************************************************************/	592	const_iv (O_CREAT , O_CREAT)
362	/* work around various missing functions */	593	const_iv (O_TRUNC , O_TRUNC)
363		594	#ifndef _WIN32
364	#if !HAVE_PREADWRITE	595	const_iv (S_IFIFO , S_IFIFO)
365	# define pread aio_pread
366	# define pwrite aio_pwrite
367
368	/*
369	* make our pread/pwrite safe against themselves, but not against
370	* normal read/write by using a mutex. slows down execution a lot,
371	* but that's your problem, not mine.
372	*/
373	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
374
375	static ssize_t
376	pread (int fd, void *buf, size_t count, off_t offset)
377	{
378	ssize_t res;
379	off_t ooffset;
380
381	pthread_mutex_lock (&preadwritelock);
382	ooffset = lseek (fd, 0, SEEK_CUR);
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&preadwritelock);
387
388	return res;
389	}
390
391	static ssize_t
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396
397	pthread_mutex_lock (&preadwritelock);
398	ooffset = lseek (fd, 0, SEEK_CUR);
399	lseek (fd, offset, SEEK_SET);
400	res = write (fd, buf, count);
401	lseek (fd, offset, SEEK_SET);
402	pthread_mutex_unlock (&preadwritelock);
403
404	return res;
405	}
406	#endif	596	#endif
		597	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		598	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		599	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		600	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		601	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		602	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
407		603
408	#if !HAVE_FDATASYNC	604	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
409	# define fdatasync fsync	605	const_eio (SYNC_FILE_RANGE_WRITE)
410	#endif	606	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
411		607
412	#if !HAVE_READAHEAD	608	const_eio (READDIR_DENTS)
413	# define readahead aio_readahead	609	const_eio (READDIR_DIRS_FIRST)
		610	const_eio (READDIR_STAT_ORDER)
		611	const_eio (READDIR_FOUND_UNKNOWN)
414		612
415	static ssize_t	613	const_eio (DT_UNKNOWN)
416	readahead (int fd, off_t offset, size_t count)	614	const_eio (DT_FIFO)
417	{	615	const_eio (DT_CHR)
418	char readahead_buf[4096];	616	const_eio (DT_DIR)
419		617	const_eio (DT_BLK)
420	while (count > 0)	618	const_eio (DT_REG)
421	{	619	const_eio (DT_LNK)
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	620	const_eio (DT_SOCK)
423		621	const_eio (DT_WHT)
424	pread (fd, readahead_buf, len, offset);
425	offset += len;
426	count -= len;
427	}
428
429	errno = 0;
430	}
431	#endif
432
433	#if !HAVE_READDIR_R
434	# define readdir_r aio_readdir_r
435
436	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
437
438	static int
439	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
440	{
441	struct dirent *e;
442	int errorno;
443
444	pthread_mutex_lock (&readdirlock);
445
446	e = readdir (dirp);
447	errorno = errno;
448
449	if (e)
450	{
451	*res = ent;
452	strcpy (ent->d_name, e->d_name);
453	}
454	else
455	*res = 0;
456
457	pthread_mutex_unlock (&readdirlock);
458
459	errno = errorno;
460	return e ? 0 : -1;
461	}
462	#endif
463
464	/* sendfile always needs emulation */
465	static ssize_t
466	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
467	{
468	ssize_t res;
469
470	if (!count)
471	return 0;
472
473	#if HAVE_SENDFILE
474	# if __linux
475	res = sendfile (ofd, ifd, &offset, count);
476
477	# elif __freebsd
478	/*
479	* Of course, the freebsd sendfile is a dire hack with no thoughts
480	* wasted on making it similar to other I/O functions.
481	*/
482	{
483	off_t sbytes;
484	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
485
486	if (res < 0 && sbytes)
487	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
488	res = sbytes;
489	}	622	};
490		623
491	# elif __hpux	624	stash = gv_stashpv ("IO::AIO", 1);
492	res = sendfile (ofd, ifd, offset, count, 0, 0);
493		625
494	# elif __solaris	626	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
495	{	627	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
496	struct sendfilevec vec;
497	size_t sbytes;
498		628
499	vec.sfv_fd = ifd;
500	vec.sfv_flag = 0;
501	vec.sfv_off = offset;
502	vec.sfv_len = count;
503
504	res = sendfilev (ofd, &vec, 1, &sbytes);
505
506	if (res < 0 && sbytes)
507	res = sbytes;
508	}
509
510	# endif
511	#else
512	res = -1;
513	errno = ENOSYS;
514	#endif
515
516	if (res < 0
517	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
518	#if __solaris
519	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
520	#endif
521	)
522	)
523	{
524	/* emulate sendfile. this is a major pain in the ass */
525	char buf[4096];
526	res = 0;
527
528	while (count)
529	{
530	ssize_t cnt;
531
532	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
533
534	if (cnt <= 0)
535	{
536	if (cnt && !res) res = -1;
537	break;
538	}
539
540	cnt = write (ofd, buf, cnt);
541
542	if (cnt <= 0)
543	{
544	if (cnt && !res) res = -1;
545	break;
546	}
547
548	offset += cnt;
549	res += cnt;
550	count -= cnt;
551	}
552	}
553
554	return res;
555	}
556
557	/* read a full directory */
558	static int
559	scandir_ (const char *path, void **namesp)
560	{
561	DIR *dirp = opendir (path);
562	union
563	{
564	struct dirent d;
565	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
566	} u;
567	struct dirent *entp;
568	char *name, *names;
569	int memlen = 4096;
570	int memofs = 0;
571	int res = 0;
572	int errorno;
573
574	if (!dirp)
575	return -1;
576
577	names = malloc (memlen);
578
579	for (;;)
580	{
581	errno = 0, readdir_r (dirp, &u.d, &entp);
582
583	if (!entp)
584	break;
585
586	name = entp->d_name;
587
588	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
589	{
590	int len = strlen (name) + 1;
591
592	res++;
593
594	while (memofs + len > memlen)
595	{
596	memlen *= 2;
597	names = realloc (names, memlen);
598	if (!names)
599	break;
600	}
601
602	memcpy (names + memofs, name, len);
603	memofs += len;
604	}
605	}
606
607	errorno = errno;
608	closedir (dirp);
609
610	if (errorno)
611	{
612	free (names);
613	errno = errorno;
614	res = -1;
615	}
616
617	*namesp = (void *)names;
618	return res;
619	}
620
621	/*****************************************************************************/
622
623	static void *
624	aio_proc (void *thr_arg)
625	{
626	aio_req req;
627	int type;
628
629	do
630	{
631	pthread_mutex_lock (&reqlock);
632
633	for (;;)
634	{
635	req = reqs;
636
637	if (reqs)
638	{
639	reqs = reqs->next;
640	if (!reqs) reqe = 0;
641	}
642
643	if (req)
644	break;
645
646	pthread_cond_wait (&reqwait, &reqlock);
647	}
648
649	pthread_mutex_unlock (&reqlock);
650
651	errno = 0; /* strictly unnecessary */
652
653	type = req->type;
654
655	switch (type)
656	{
657	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
658	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
659
660	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
661	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
662
663	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
664	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
665	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
666
667	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
668	case REQ_CLOSE: req->result = close (req->fd); break;
669	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
670	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
671	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
672	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
673	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
674
675	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
676	case REQ_FSYNC: req->result = fsync (req->fd); break;
677	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
678
679	case REQ_QUIT:
680	break;
681
682	default:
683	req->result = ENOSYS;
684	break;
685	}
686
687	req->errorno = errno;
688
689	pthread_mutex_lock (&reslock);
690
691	req->next = 0;
692
693	if (rese)
694	{
695	rese->next = req;
696	rese = req;
697	}
698	else
699	{
700	rese = ress = req;
701
702	/* write a dummy byte to the pipe so fh becomes ready */
703	write (respipe [1], &respipe, 1);
704	}
705
706	pthread_mutex_unlock (&reslock);
707	}
708	while (type != REQ_QUIT);
709
710	return 0;
711	}
712
713	/*****************************************************************************/
714
715	static void atfork_prepare (void)
716	{
717	pthread_mutex_lock (&reqlock);
718	pthread_mutex_lock (&reslock);
719	#if !HAVE_PREADWRITE
720	pthread_mutex_lock (&preadwritelock);
721	#endif
722	#if !HAVE_READDIR_R
723	pthread_mutex_lock (&readdirlock);
724	#endif
725	}
726
727	static void atfork_parent (void)
728	{
729	#if !HAVE_READDIR_R
730	pthread_mutex_unlock (&readdirlock);
731	#endif
732	#if !HAVE_PREADWRITE
733	pthread_mutex_unlock (&preadwritelock);
734	#endif
735	pthread_mutex_unlock (&reslock);
736	pthread_mutex_unlock (&reqlock);
737	}
738
739	static void atfork_child (void)
740	{
741	aio_req prv;
742
743	started = 0;
744
745	while (reqs)
746	{
747	prv = reqs;
748	reqs = prv->next;
749	free_req (prv);
750	}
751
752	reqs = reqe = 0;
753
754	while (ress)
755	{
756	prv = ress;
757	ress = prv->next;
758	free_req (prv);
759	}
760
761	ress = rese = 0;
762
763	close (respipe [0]);
764	close (respipe [1]);
765	create_pipe ();	629	create_respipe ();
766		630
767	atfork_parent ();	631	if (eio_init (want_poll, done_poll) < 0)
768	}	632	croak ("IO::AIO: unable to initialise eio library");
769		633
770	#define dREQ \	634	/* atfork child called in fifo order, so before eio's handler */
771	aio_req req; \	635	X_THREAD_ATFORK (0, 0, atfork_child);
772	\
773	if (SvOK (callback) && !SvROK (callback)) \
774	croak ("clalback must be undef or of reference type"); \
775	\
776	Newz (0, req, 1, aio_cb); \
777	if (!req) \
778	croak ("out of memory during aio_req allocation"); \
779	\
780	req->callback = newSVsv (callback);
781
782	MODULE = IO::AIO PACKAGE = IO::AIO
783
784	PROTOTYPES: ENABLE
785
786	BOOT:
787	{
788	HV *stash = gv_stashpv ("IO::AIO", 1);
789	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
790	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
791	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
792
793	create_pipe ();
794	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
795	}	636	}
796		637
797	void	638	void
798	min_parallel (nthreads)	639	max_poll_reqs (int nreqs)
799	int nthreads
800	PROTOTYPE: $	640	PROTOTYPE: $
		641	CODE:
		642	eio_set_max_poll_reqs (nreqs);
801		643
802	void	644	void
803	max_parallel (nthreads)	645	max_poll_time (double nseconds)
804	int nthreads
805	PROTOTYPE: $	646	PROTOTYPE: $
806
807	int
808	max_outstanding (nreqs)
809	int nreqs
810	PROTOTYPE: $
811	CODE:	647	CODE:
812	RETVAL = max_outstanding;	648	eio_set_max_poll_time (nseconds);
		649
		650	void
		651	min_parallel (int nthreads)
		652	PROTOTYPE: $
		653	CODE:
		654	eio_set_min_parallel (nthreads);
		655
		656	void
		657	max_parallel (int nthreads)
		658	PROTOTYPE: $
		659	CODE:
		660	eio_set_max_parallel (nthreads);
		661
		662	void
		663	max_idle (int nthreads)
		664	PROTOTYPE: $
		665	CODE:
		666	eio_set_max_idle (nthreads);
		667
		668	void
		669	max_outstanding (int maxreqs)
		670	PROTOTYPE: $
		671	CODE:
813	max_outstanding = nreqs;	672	max_outstanding = maxreqs;
814		673
815	void	674	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	675	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
817	SV * pathname
818	int flags
819	int mode
820	SV * callback
821	PROTOTYPE: $$$;$	676	PROTOTYPE: $$$;$
822	CODE:	677	PPCODE:
823	{	678	{
824	dREQ;	679	dREQ;
825		680
826	req->type = REQ_OPEN;	681	req->type = EIO_OPEN;
827	req->data = newSVsv (pathname);	682	req->sv1 = newSVsv (pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);	683	req->ptr1 = SvPVbyte_nolen (req->sv1);
829	req->fd = flags;	684	req->int1 = flags;
830	req->mode = mode;	685	req->int2 = mode;
831		686
832	send_req (req);	687	REQ_SEND;
833	}	688	}
834		689
835	void	690	void
836	aio_close (fh,callback=&PL_sv_undef)	691	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
837	SV * fh
838	SV * callback
839	PROTOTYPE: $;$	692	PROTOTYPE: $;$
840	ALIAS:	693	ALIAS:
841	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	694	aio_fsync = EIO_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	695	aio_fdatasync = EIO_FDATASYNC
844	CODE:	696	PPCODE:
845	{	697	{
		698	int fd = s_fileno_croak (fh, 0);
846	dREQ;	699	dREQ;
847		700
848	req->type = ix;	701	req->type = ix;
849	req->fh = newSVsv (fh);	702	req->sv1 = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	703	req->int1 = fd;
851		704
852	send_req (req);	705	REQ_SEND (req);
853	}	706	}
854		707
855	void	708	void
		709	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		710	PROTOTYPE: $$$$;$
		711	PPCODE:
		712	{
		713	int fd = s_fileno_croak (fh, 0);
		714	dREQ;
		715
		716	req->type = EIO_SYNC_FILE_RANGE;
		717	req->sv1 = newSVsv (fh);
		718	req->int1 = fd;
		719	req->offs = offset;
		720	req->size = nbytes;
		721	req->int2 = flags;
		722
		723	REQ_SEND (req);
		724	}
		725
		726	void
		727	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		728	PROTOTYPE: $;$
		729	PPCODE:
		730	{
		731	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		732	int fd = s_fileno_croak (fh, 0);
		733	dREQ;
		734
		735	if (close_pipe < 0)
		736	{
		737	int pipefd [2];
		738
		739	if (pipe (pipefd) < 0
		740	|| close (pipefd [1]) < 0
		741	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		742	abort (); /*D*/
		743
		744	close_pipe = pipefd [0];
		745	}
		746
		747	req->type = EIO_DUP2;
		748	req->int1 = close_pipe;
		749	req->sv2 = newSVsv (fh);
		750	req->int2 = fd;
		751
		752	REQ_SEND (req);
		753	}
		754
		755	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	756	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
857	SV * fh
858	UV offset
859	UV length
860	SV * data
861	UV dataoffset
862	SV * callback
863	ALIAS:	757	ALIAS:
864	aio_read = REQ_READ	758	aio_read = EIO_READ
865	aio_write = REQ_WRITE	759	aio_write = EIO_WRITE
866	PROTOTYPE: $$$$$;$	760	PROTOTYPE: $$$$$;$
867	CODE:	761	PPCODE:
868	{	762	{
869	aio_req req;
870	STRLEN svlen;	763	STRLEN svlen;
		764	int fd = s_fileno_croak (fh, ix == EIO_WRITE);
871	char *svptr = SvPVbyte (data, svlen);	765	char *svptr = SvPVbyte (data, svlen);
872		766	UV len = SvUV (length);
873	SvUPGRADE (data, SVt_PV);
874	SvPOK_on (data);
875		767
876	if (dataoffset < 0)	768	if (dataoffset < 0)
877	dataoffset += svlen;	769	dataoffset += svlen;
878		770
879	if (dataoffset < 0 || dataoffset > svlen)	771	if (dataoffset < 0 || dataoffset > svlen)
880	croak ("data offset outside of string");	772	croak ("dataoffset outside of data scalar");
881		773
882	if (ix == REQ_WRITE)	774	if (ix == EIO_WRITE)
883	{	775	{
884	/* write: check length and adjust. */	776	/* write: check length and adjust. */
885	if (length < 0 || length + dataoffset > svlen)	777	if (!SvOK (length) || len + dataoffset > svlen)
886	length = svlen - dataoffset;	778	len = svlen - dataoffset;
887	}	779	}
888	else	780	else
889	{	781	{
890	/* read: grow scalar as necessary */	782	/* read: check type and grow scalar as necessary */
		783	SvUPGRADE (data, SVt_PV);
891	svptr = SvGROW (data, length + dataoffset);	784	svptr = SvGROW (data, len + dataoffset + 1);
892	}	785	}
893
894	if (length < 0)
895	croak ("length must not be negative");
896		786
897	{	787	{
898	dREQ;	788	dREQ;
899		789
900	req->type = ix;	790	req->type = ix;
901	req->fh = newSVsv (fh);	791	req->sv1 = newSVsv (fh);
902	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	792	req->int1 = fd;
903	: IoOFP (sv_2io (fh)));	793	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
904	req->offset = offset;	794	req->size = len;
905	req->length = length;
906	req->data = SvREFCNT_inc (data);	795	req->sv2 = SvREFCNT_inc (data);
907	req->dataptr = (char *)svptr + dataoffset;	796	req->ptr2 = (char *)svptr + dataoffset;
		797	req->stroffset = dataoffset;
908		798
909	if (!SvREADONLY (data))	799	if (!SvREADONLY (data))
910	{	800	{
911	SvREADONLY_on (data);	801	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	802	req->flags |= FLAG_SV2_RO_OFF;
913	}	803	}
914		804
915	send_req (req);	805	REQ_SEND;
916	}	806	}
917	}	807	}
918		808
919	void	809	void
		810	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		811	PROTOTYPE: $$;$
		812	PPCODE:
		813	{
		814	SV *data;
		815	dREQ;
		816
		817	req->type = EIO_READLINK;
		818	req->sv1 = newSVsv (path);
		819	req->ptr1 = SvPVbyte_nolen (req->sv1);
		820
		821	REQ_SEND;
		822	}
		823
		824	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	825	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
921	SV * out_fh
922	SV * in_fh
923	UV in_offset
924	UV length
925	SV * callback
926	PROTOTYPE: $$$$;$	826	PROTOTYPE: $$$$;$
927	CODE:	827	PPCODE:
928	{	828	{
		829	int ifd = s_fileno_croak (in_fh , 0);
		830	int ofd = s_fileno_croak (out_fh, 1);
929	dREQ;	831	dREQ;
930		832
931	req->type = REQ_SENDFILE;	833	req->type = EIO_SENDFILE;
932	req->fh = newSVsv (out_fh);	834	req->sv1 = newSVsv (out_fh);
933	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	835	req->int1 = ofd;
934	req->fh2 = newSVsv (in_fh);	836	req->sv2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	837	req->int2 = ifd;
936	req->offset = in_offset;	838	req->offs = in_offset;
937	req->length = length;	839	req->size = length;
938		840
939	send_req (req);	841	REQ_SEND;
940	}	842	}
941		843
942	void	844	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	845	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
944	SV * fh
945	UV offset
946	IV length
947	SV * callback
948	PROTOTYPE: $$$;$	846	PROTOTYPE: $$$;$
949	CODE:	847	PPCODE:
950	{	848	{
		849	int fd = s_fileno_croak (fh, 0);
951	dREQ;	850	dREQ;
952		851
953	req->type = REQ_READAHEAD;	852	req->type = EIO_READAHEAD;
954	req->fh = newSVsv (fh);	853	req->sv1 = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	854	req->int1 = fd;
956	req->offset = offset;	855	req->offs = offset;
957	req->length = length;	856	req->size = length;
958		857
959	send_req (req);	858	REQ_SEND;
960	}	859	}
961		860
962	void	861	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	862	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
964	SV * fh_or_path
965	SV * callback
966	ALIAS:	863	ALIAS:
967	aio_stat = REQ_STAT	864	aio_stat = EIO_STAT
968	aio_lstat = REQ_LSTAT	865	aio_lstat = EIO_LSTAT
969	CODE:	866	PPCODE:
970	{	867	{
971	dREQ;	868	dREQ;
972		869
973	New (0, req->statdata, 1, Stat_t);	870	req->sv1 = newSVsv (fh_or_path);
974	if (!req->statdata)
975	{
976	free_req (req);
977	croak ("out of memory during aio_req->statdata allocation");
978	}
979		871
980	if (SvPOK (fh_or_path))	872	if (SvPOK (req->sv1))
981	{	873	{
982	req->type = ix;	874	req->type = ix;
983	req->data = newSVsv (fh_or_path);
984	req->dataptr = SvPVbyte_nolen (req->data);	875	req->ptr1 = SvPVbyte_nolen (req->sv1);
985	}	876	}
986	else	877	else
987	{	878	{
988	req->type = REQ_FSTAT;	879	req->type = EIO_FSTAT;
989	req->fh = newSVsv (fh_or_path);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	880	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		881	}
		882
		883	REQ_SEND;
		884	}
		885
		886	void
		887	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		888	PPCODE:
		889	{
		890	dREQ;
		891
		892	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		893	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		894	req->sv1 = newSVsv (fh_or_path);
		895
		896	if (SvPOK (req->sv1))
991	}	897	{
		898	req->type = EIO_UTIME;
		899	req->ptr1 = SvPVbyte_nolen (req->sv1);
		900	}
		901	else
		902	{
		903	req->type = EIO_FUTIME;
		904	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		905	}
992		906
993	send_req (req);	907	REQ_SEND;
994	}	908	}
995		909
996	void	910	void
		911	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		912	PPCODE:
		913	{
		914	dREQ;
		915
		916	req->sv1 = newSVsv (fh_or_path);
		917	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		918
		919	if (SvPOK (req->sv1))
		920	{
		921	req->type = EIO_TRUNCATE;
		922	req->ptr1 = SvPVbyte_nolen (req->sv1);
		923	}
		924	else
		925	{
		926	req->type = EIO_FTRUNCATE;
		927	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		928	}
		929
		930	REQ_SEND;
		931	}
		932
		933	void
		934	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		935	ALIAS:
		936	aio_chmod = EIO_CHMOD
		937	aio_mkdir = EIO_MKDIR
		938	PPCODE:
		939	{
		940	dREQ;
		941
		942	req->int2 = mode;
		943	req->sv1 = newSVsv (fh_or_path);
		944
		945	if (SvPOK (req->sv1))
		946	{
		947	req->type = ix;
		948	req->ptr1 = SvPVbyte_nolen (req->sv1);
		949	}
		950	else
		951	{
		952	req->type = EIO_FCHMOD;
		953	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		954	}
		955
		956	REQ_SEND;
		957	}
		958
		959	void
		960	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		961	PPCODE:
		962	{
		963	dREQ;
		964
		965	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		966	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		967	req->sv1 = newSVsv (fh_or_path);
		968
		969	if (SvPOK (req->sv1))
		970	{
		971	req->type = EIO_CHOWN;
		972	req->ptr1 = SvPVbyte_nolen (req->sv1);
		973	}
		974	else
		975	{
		976	req->type = EIO_FCHOWN;
		977	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		978	}
		979
		980	REQ_SEND;
		981	}
		982
		983	void
		984	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		985	PPCODE:
		986	{
		987	dREQ;
		988
		989	req->type = EIO_READDIR;
		990	req->sv1 = newSVsv (pathname);
		991	req->ptr1 = SvPVbyte_nolen (req->sv1);
		992	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		993
		994	if (flags & EIO_READDIR_DENTS)
		995	req->int1 |= EIO_READDIR_CUSTOM2;
		996
		997	REQ_SEND;
		998	}
		999
		1000	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	1001	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
998	SV * pathname
999	SV * callback
1000	ALIAS:	1002	ALIAS:
1001	aio_unlink = REQ_UNLINK	1003	aio_unlink = EIO_UNLINK
1002	aio_rmdir = REQ_RMDIR	1004	aio_rmdir = EIO_RMDIR
1003	aio_readdir = REQ_READDIR	1005	aio_readdir = EIO_READDIR
1004	CODE:	1006	PPCODE:
1005	{	1007	{
1006	dREQ;	1008	dREQ;
1007		1009
1008	req->type = ix;	1010	req->type = ix;
1009	req->data = newSVsv (pathname);	1011	req->sv1 = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	1012	req->ptr1 = SvPVbyte_nolen (req->sv1);
1011
1012	send_req (req);
1013	}
1014		1013
		1014	REQ_SEND;
		1015	}
		1016
1015	void	1017	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1018	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1017	SV * oldpath
1018	SV * newpath
1019	SV * callback
1020	ALIAS:	1019	ALIAS:
1021	aio_link = REQ_LINK	1020	aio_link = EIO_LINK
1022	aio_symlink = REQ_SYMLINK	1021	aio_symlink = EIO_SYMLINK
1023	aio_rename = REQ_RENAME	1022	aio_rename = EIO_RENAME
1024	CODE:	1023	PPCODE:
1025	{	1024	{
1026	dREQ;	1025	dREQ;
1027		1026
1028	req->type = ix;	1027	req->type = ix;
1029	req->fh = newSVsv (oldpath);	1028	req->sv1 = newSVsv (oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	1029	req->ptr1 = SvPVbyte_nolen (req->sv1);
1031	req->data = newSVsv (newpath);	1030	req->sv2 = newSVsv (newpath);
1032	req->dataptr = SvPVbyte_nolen (req->data);	1031	req->ptr2 = SvPVbyte_nolen (req->sv2);
1033		1032
1034	send_req (req);	1033	REQ_SEND;
1035	}	1034	}
		1035
		1036	void
		1037	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1038	PPCODE:
		1039	{
		1040	dREQ;
		1041
		1042	req->type = EIO_MKNOD;
		1043	req->sv1 = newSVsv (pathname);
		1044	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1045	req->int2 = (mode_t)mode;
		1046	req->offs = dev;
		1047
		1048	REQ_SEND;
		1049	}
		1050
		1051	void
		1052	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1053	PPCODE:
		1054	{
		1055	dREQ;
		1056
		1057	req->type = EIO_BUSY;
		1058	req->nv1 = delay < 0. ? 0. : delay;
		1059
		1060	REQ_SEND;
		1061	}
		1062
		1063	void
		1064	aio_group (SV *callback=&PL_sv_undef)
		1065	PROTOTYPE: ;$
		1066	PPCODE:
		1067	{
		1068	dREQ;
		1069
		1070	req->type = EIO_GROUP;
		1071
		1072	req_submit (req);
		1073	XPUSHs (req_sv (req, AIO_GRP_KLASS));
		1074	}
		1075
		1076	void
		1077	aio_nop (SV *callback=&PL_sv_undef)
		1078	ALIAS:
		1079	aio_nop = EIO_NOP
		1080	aio_sync = EIO_SYNC
		1081	PPCODE:
		1082	{
		1083	dREQ;
		1084
		1085	req->type = ix;
		1086
		1087	REQ_SEND;
		1088	}
		1089
		1090	int
		1091	aioreq_pri (int pri = 0)
		1092	PROTOTYPE: ;$
		1093	CODE:
		1094	RETVAL = next_pri;
		1095	if (items > 0)
		1096	{
		1097	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1098	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1099	next_pri = pri;
		1100	}
		1101	OUTPUT:
		1102	RETVAL
		1103
		1104	void
		1105	aioreq_nice (int nice = 0)
		1106	CODE:
		1107	nice = next_pri - nice;
		1108	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1109	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1110	next_pri = nice;
1036		1111
1037	void	1112	void
1038	flush ()	1113	flush ()
1039	PROTOTYPE:	1114	PROTOTYPE:
1040	CODE:	1115	CODE:
1041	while (nreqs)	1116	while (eio_nreqs ())
1042	{	1117	{
1043	poll_wait ();	1118	poll_wait ();
1044	poll_cb ();	1119	poll_cb ();
1045	}	1120	}
1046		1121
1047	void	1122	int
1048	poll()	1123	poll()
1049	PROTOTYPE:	1124	PROTOTYPE:
1050	CODE:	1125	CODE:
1051	if (nreqs)
1052	{
1053	poll_wait ();	1126	poll_wait ();
1054	poll_cb ();	1127	RETVAL = poll_cb ();
1055	}	1128	OUTPUT:
		1129	RETVAL
1056		1130
1057	int	1131	int
1058	poll_fileno()	1132	poll_fileno()
1059	PROTOTYPE:	1133	PROTOTYPE:
1060	CODE:	1134	CODE:
…		…
1072		1146
1073	void	1147	void
1074	poll_wait()	1148	poll_wait()
1075	PROTOTYPE:	1149	PROTOTYPE:
1076	CODE:	1150	CODE:
1077	if (nreqs)
1078	poll_wait ();	1151	poll_wait ();
1079		1152
1080	int	1153	int
1081	nreqs()	1154	nreqs()
1082	PROTOTYPE:	1155	PROTOTYPE:
1083	CODE:	1156	CODE:
1084	RETVAL = nreqs;	1157	RETVAL = eio_nreqs ();
1085	OUTPUT:	1158	OUTPUT:
1086	RETVAL	1159	RETVAL
1087		1160
		1161	int
		1162	nready()
		1163	PROTOTYPE:
		1164	CODE:
		1165	RETVAL = eio_nready ();
		1166	OUTPUT:
		1167	RETVAL
		1168
		1169	int
		1170	npending()
		1171	PROTOTYPE:
		1172	CODE:
		1173	RETVAL = eio_npending ();
		1174	OUTPUT:
		1175	RETVAL
		1176
		1177	int
		1178	nthreads()
		1179	PROTOTYPE:
		1180	CODE:
		1181	RETVAL = eio_nthreads ();
		1182	OUTPUT:
		1183	RETVAL
		1184
		1185	int
		1186	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1187	PROTOTYPE: $$$$
		1188	CODE:
		1189	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1190	RETVAL = posix_fadvise (fh, offset, length, advice);
		1191	#else
		1192	RETVAL = errno = ENOSYS;
		1193	#endif
		1194	OUTPUT:
		1195	RETVAL
		1196
		1197	ssize_t
		1198	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1199	PROTOTYPE: $$$$
		1200	CODE:
		1201	eio_sendfile_sync (ofh, ifh, offset, count);
		1202
		1203	void _on_next_submit (SV *cb)
		1204	CODE:
		1205	SvREFCNT_dec (on_next_submit);
		1206	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1207
		1208	PROTOTYPES: DISABLE
		1209
		1210	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1211
		1212	void
		1213	cancel (aio_req_ornot req)
		1214	CODE:
		1215	eio_cancel (req);
		1216
		1217	void
		1218	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1219	PPCODE:
		1220	{
		1221	if (GIMME_V != G_VOID)
		1222	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1223
		1224	if (items > 1)
		1225	{
		1226	SV *cb_cv = get_cb (callback);
		1227
		1228	SvREFCNT_dec (req->callback);
		1229	req->callback = SvREFCNT_inc (cb_cv);
		1230	}
		1231	}
		1232
		1233	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1234
		1235	void
		1236	add (aio_req grp, ...)
		1237	PPCODE:
		1238	{
		1239	int i;
		1240
		1241	if (grp->int1 == 2)
		1242	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1243
		1244	for (i = 1; i < items; ++i )
		1245	{
		1246	aio_req req;
		1247
		1248	if (GIMME_V != G_VOID)
		1249	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1250
		1251	req = SvAIO_REQ (ST (i));
		1252
		1253	if (req)
		1254	eio_grp_add (grp, req);
		1255	}
		1256	}
		1257
		1258	void
		1259	cancel_subs (aio_req_ornot req)
		1260	CODE:
		1261	req_cancel_subs (req);
		1262
		1263	void
		1264	result (aio_req grp, ...)
		1265	CODE:
		1266	{
		1267	int i;
		1268	AV *av;
		1269
		1270	grp->errorno = errno;
		1271
		1272	av = newAV ();
		1273	av_extend (av, items - 1);
		1274
		1275	for (i = 1; i < items; ++i )
		1276	av_push (av, newSVsv (ST (i)));
		1277
		1278	SvREFCNT_dec (grp->sv1);
		1279	grp->sv1 = (SV *)av;
		1280	}
		1281
		1282	void
		1283	errno (aio_req grp, int errorno = errno)
		1284	CODE:
		1285	grp->errorno = errorno;
		1286
		1287	void
		1288	limit (aio_req grp, int limit)
		1289	CODE:
		1290	eio_grp_limit (grp, limit);
		1291
		1292	void
		1293	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1294	CODE:
		1295	{
		1296	SvREFCNT_dec (grp->sv2);
		1297	grp->sv2 = newSVsv (callback);
		1298	grp->feed = aio_grp_feed;
		1299
		1300	if (grp->int2 <= 0)
		1301	grp->int2 = 2;
		1302
		1303	eio_grp_limit (grp, grp->int2);
		1304	}
		1305

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