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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.44 by root, Sat Oct 21 23:20:29 2006 UTC vs.
Revision 1.148 by root, Wed Jun 17 01:14:48 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
10	#include <pthread.h>
11
12	#include <stddef.h>	9	#include <stddef.h>
		10	#include <stdlib.h>
13	#include <errno.h>	11	#include <errno.h>
14	#include <sys/types.h>	12	#include <sys/types.h>
15	#include <sys/stat.h>	13	#include <sys/stat.h>
16	#include <limits.h>	14	#include <limits.h>
17	#include <unistd.h>
18	#include <fcntl.h>	15	#include <fcntl.h>
19	#include <signal.h>
20	#include <sched.h>	16	#include <sched.h>
21		17
22	#if HAVE_SENDFILE	18	/* perl namespace pollution */
23	# if __linux	19	#undef VERSION
24	# include <sys/sendfile.h>	20
25	# elif __freebsd	21	#ifdef _WIN32
26	# include <sys/socket.h>	22
27	# include <sys/uio.h>	23	# define EIO_STRUCT_DIRENT Direntry_t
28	# elif __hpux	24	# undef malloc
29	# include <sys/socket.h>	25	# undef free
30	# elif __solaris /* not yet */	26
31	# include <sys/sendfile.h>	27	// perl overrides all those nice win32 functions
		28	# undef open
		29	# undef read
		30	# undef write
		31	# undef send
		32	# undef recv
		33	# undef stat
		34	# undef fstat
		35	# define lstat stat
		36	# undef truncate
		37	# undef ftruncate
		38	# undef open
		39	# undef close
		40	# undef unlink
		41	# undef rmdir
		42	# undef rename
		43	# undef lseek
		44
		45	# define chown(a,b,c) (errno = ENOSYS, -1)
		46	# define fchown(a,b,c) (errno = ENOSYS, -1)
		47	# define fchmod(a,b) (errno = ENOSYS, -1)
		48	# define symlink(a,b) (errno = ENOSYS, -1)
		49	# define readlink(a,b,c) (errno = ENOSYS, -1)
		50	# define mknod(a,b,c) (errno = ENOSYS, -1)
		51	# define truncate(a,b) (errno = ENOSYS, -1)
		52	# define ftruncate(fd,o) chsize ((fd), (o))
		53	# define fsync(fd) _commit (fd)
		54	# define opendir(fd) (errno = ENOSYS, 0)
		55	# define readdir(fd) (errno = ENOSYS, -1)
		56	# define closedir(fd) (errno = ENOSYS, -1)
		57	# define mkdir(a,b) mkdir (a)
		58
32	# else	59	#else
33	# error sendfile support requested but not available	60
34	# endif	61	# include <sys/time.h>
		62	# include <sys/select.h>
		63	# include <unistd.h>
		64	# include <utime.h>
		65	# include <signal.h>
		66	# define EIO_STRUCT_DIRENT struct dirent
		67
35	#endif	68	#endif
36		69
37	/* used for struct dirent, AIX doesn't provide it */	70	/* perl stupidly overrides readdir and maybe others */
38	#ifndef NAME_MAX	71	/* with thread-unsafe versions, imagine that :( */
39	# define NAME_MAX 4096	72	#undef readdir
		73	#undef opendir
		74	#undef closedir
		75
		76	#define EIO_STRUCT_STAT Stat_t
		77
		78	/* use NV for 32 bit perls as it allows larger offsets */
		79	#if IVSIZE >= 8
		80	# define VAL64 IV
		81	# define SvVAL64 SvIV
		82	# define newSVval64 newSViv
		83	#else
		84	# define VAL64 NV
		85	# define SvVAL64 SvNV
		86	# define newSVval64 newSVnv
40	#endif	87	#endif
41		88
42	#if __ia64	89	/*****************************************************************************/
43	# define STACKSIZE 65536	90
		91	#if __GNUC__ >= 3
		92	# define expect(expr,value) __builtin_expect ((expr),(value))
44	#else	93	#else
45	# define STACKSIZE 8192	94	# define expect(expr,value) (expr)
46	#endif	95	#endif
47		96
48	enum {	97	#define expect_false(expr) expect ((expr) != 0, 0)
49	REQ_QUIT,	98	#define expect_true(expr) expect ((expr) != 0, 1)
50	REQ_OPEN, REQ_CLOSE,	99
51	REQ_READ, REQ_WRITE, REQ_READAHEAD,	100	/*****************************************************************************/
52	REQ_SENDFILE,	101
53	REQ_STAT, REQ_LSTAT, REQ_FSTAT,	102	static HV *stash;
54	REQ_FSYNC, REQ_FDATASYNC,	103	typedef SV SV8; /* byte-sv, used for argument-checking */
55	REQ_UNLINK, REQ_RMDIR, REQ_RENAME,	104	typedef int aio_rfd; /* read file desriptor */
56	REQ_READDIR,	105	typedef int aio_wfd; /* write file descriptor */
57	REQ_LINK, REQ_SYMLINK,
58	REQ_GROUP,
59	};
60		106
61	#define AIO_REQ_KLASS "IO::AIO::REQ"	107	#define AIO_REQ_KLASS "IO::AIO::REQ"
62	#define AIO_GRP_KLASS "IO::AIO::GRP"	108	#define AIO_GRP_KLASS "IO::AIO::GRP"
63		109
64	typedef struct aio_cb	110	#define EIO_REQ_MEMBERS \
65	{
66	struct aio_cb *grp, *grp_prev, *grp_next;
67
68	struct aio_cb *volatile next;
69
70	SV *self; /* the perl counterpart of this request, if any */
71
72	SV *data, *callback;	111	SV *callback; \
73	SV *fh, *fh2;	112	SV *sv1, *sv2; \
74	void *dataptr, *data2ptr;
75	Stat_t *statdata;
76	off_t offset;
77	size_t length;
78	ssize_t result;
79
80	int type;
81	int fd, fd2;
82	int errorno;
83	STRLEN dataoffset;	113	STRLEN stroffset; \
84	mode_t mode; /* open */	114	SV *self;
85	unsigned char cancelled;
86	} aio_cb;
87		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/eio.h"
		119
		120	#ifndef POSIX_FADV_NORMAL
		121	# define POSIX_FADV_NORMAL 0
		122	#endif
		123
		124	#ifndef POSIX_FADV_SEQUENTIAL
		125	# define POSIX_FADV_SEQUENTIAL 0
		126	#endif
		127
		128	#ifndef POSIX_FADV_RANDOM
		129	# define POSIX_FADV_RANDOM 0
		130	#endif
		131
		132	#ifndef POSIX_FADV_NOREUSE
		133	# define POSIX_FADV_NOREUSE 0
		134	#endif
		135
		136	#ifndef POSIX_FADV_WILLNEED
		137	# define POSIX_FADV_WILLNEED 0
		138	#endif
		139
		140	#ifndef POSIX_FADV_DONTNEED
		141	# define POSIX_FADV_DONTNEED 0
		142	#endif
		143
		144	static int req_invoke (eio_req *req);
		145	#define EIO_FINISH(req) req_invoke (req)
		146	static void req_destroy (eio_req *grp);
		147	#define EIO_DESTROY(req) req_destroy (req)
		148
		149	enum {
		150	FLAG_SV2_RO_OFF = 0x40, /* data was set readonly */
		151	};
		152
		153	#include "libeio/eio.c"
		154
88	typedef aio_cb *aio_req;	155	typedef eio_req *aio_req;
89	typedef aio_cb *aio_req_ornot;	156	typedef eio_req *aio_req_ornot;
90	typedef aio_cb *aio_group;
91		157
92	static int started, wanted;	158	static SV *on_next_submit;
93	static volatile int nreqs;	159	static int next_pri = EIO_PRI_DEFAULT;
94	static int max_outstanding = 1<<30;	160	static int max_outstanding;
95	static int respipe [2];
96		161
97	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	162	static int respipe_osf [2], respipe [2] = { -1, -1 };
98	static pthread_mutex_t reqlock = PTHREAD_MUTEX_INITIALIZER;
99	static pthread_cond_t reqwait = PTHREAD_COND_INITIALIZER;
100		163
101	static volatile aio_req reqs, reqe; /* queue start, queue end */	164	static void req_destroy (aio_req req);
102	static volatile aio_req ress, rese; /* queue start, queue end */	165	static void req_cancel (aio_req req);
		166
		167	static void want_poll (void)
		168	{
		169	/* write a dummy byte to the pipe so fh becomes ready */
		170	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		171	}
		172
		173	static void done_poll (void)
		174	{
		175	/* read any signals sent by the worker threads */
		176	char buf [4];
		177	while (respipe_read (respipe [0], buf, 4) == 4)
		178	;
		179	}
103		180
104	/* must be called at most once */	181	/* must be called at most once */
105	static SV *req_sv (aio_req req, const char *klass)	182	static SV *req_sv (aio_req req, const char *klass)
106	{	183	{
		184	if (!req->self)
		185	{
107	req->self = (SV *)newHV ();	186	req->self = (SV *)newHV ();
108	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);	187	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		188	}
109		189
110	return sv_2mortal (sv_bless (newRV_noinc (req->self), gv_stashpv (klass, 1)));	190	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
111	}	191	}
112		192
113	static aio_req SvAIO_REQ (SV *sv, const char *klass)	193	static aio_req SvAIO_REQ (SV *sv)
114	{	194	{
		195	MAGIC *mg;
		196
115	if (!sv_derived_from (sv, klass) || !SvROK (sv))	197	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
116	croak ("object of class %s expected", klass);	198	croak ("object of class " AIO_REQ_KLASS " expected");
117		199
118	MAGIC *mg = mg_find (SvRV (sv), PERL_MAGIC_ext);	200	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
119		201
120	return mg ? (aio_req)mg->mg_ptr : 0;	202	return mg ? (aio_req)mg->mg_ptr : 0;
121	}	203	}
122		204
		205	static void aio_grp_feed (aio_req grp)
		206	{
		207	if (grp->sv2 && SvOK (grp->sv2))
		208	{
		209	dSP;
		210
		211	ENTER;
		212	SAVETMPS;
		213	PUSHMARK (SP);
		214	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		215	PUTBACK;
		216	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		217	SPAGAIN;
		218	FREETMPS;
		219	LEAVE;
		220	}
		221	}
		222
		223	static void req_submit (eio_req *req)
		224	{
		225	eio_submit (req);
		226
		227	if (expect_false (on_next_submit))
		228	{
		229	dSP;
		230	SV *cb = sv_2mortal (on_next_submit);
		231
		232	on_next_submit = 0;
		233
		234	PUSHMARK (SP);
		235	PUTBACK;
		236	call_sv (cb, G_DISCARD | G_EVAL);
		237	}
		238	}
		239
		240	static int req_invoke (eio_req *req)
		241	{
		242	dSP;
		243
		244	if (req->flags & FLAG_SV2_RO_OFF)
		245	SvREADONLY_off (req->sv2);
		246
		247	if (!EIO_CANCELLED (req) && req->callback)
		248	{
		249	ENTER;
		250	SAVETMPS;
		251	PUSHMARK (SP);
		252	EXTEND (SP, 1);
		253
		254	switch (req->type)
		255	{
		256	case EIO_READDIR:
		257	{
		258	SV *rv = &PL_sv_undef;
		259
		260	if (req->result >= 0)
		261	{
		262	int i;
		263	char *names = (char *)req->ptr2;
		264	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		265	AV *av = newAV ();
		266
		267	av_extend (av, req->result - 1);
		268
		269	for (i = 0; i < req->result; ++i)
		270	{
		271	if (req->int1 & EIO_READDIR_DENTS)
		272	{
		273	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		274
		275	if (req->int1 & EIO_READDIR_CUSTOM2)
		276	{
		277	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		278	AV *avent = newAV ();
		279
		280	av_extend (avent, 2);
		281
		282	if (!sv_type [ent->type])
		283	{
		284	sv_type [ent->type] = newSViv (ent->type);
		285	SvREADONLY_on (sv_type [ent->type]);
		286	}
		287
		288	av_store (avent, 0, namesv);
		289	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		290	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		291
		292	av_store (av, i, newRV_noinc ((SV *)avent));
		293	}
		294	else
		295	av_store (av, i, namesv);
		296
		297	++ent;
		298	}
		299	else
		300	{
		301	SV *name = newSVpv (names, 0);
		302	av_store (av, i, name);
		303	names += SvCUR (name) + 1;
		304	}
		305	}
		306
		307	rv = sv_2mortal (newRV_noinc ((SV *)av));
		308	}
		309
		310	PUSHs (rv);
		311
		312	if (req->int1 & EIO_READDIR_CUSTOM1)
		313	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		314	}
		315	break;
		316
		317	case EIO_OPEN:
		318	{
		319	/* convert fd to fh */
		320	SV *fh = &PL_sv_undef;
		321
		322	if (req->result >= 0)
		323	{
		324	GV *gv = (GV *)sv_newmortal ();
		325	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		326	char sym [64];
		327	int symlen;
		328
		329	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		330	gv_init (gv, stash, sym, symlen, 0);
		331
		332	symlen = snprintf (
		333	sym,
		334	sizeof (sym),
		335	"%s&=%d",
		336	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		337	(int)req->result
		338	);
		339
		340	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		341	fh = (SV *)gv;
		342	}
		343
		344	PUSHs (fh);
		345	}
		346	break;
		347
		348	case EIO_GROUP:
		349	req->int1 = 2; /* mark group as finished */
		350
		351	if (req->sv1)
		352	{
		353	int i;
		354	AV *av = (AV *)req->sv1;
		355
		356	EXTEND (SP, AvFILL (av) + 1);
		357	for (i = 0; i <= AvFILL (av); ++i)
		358	PUSHs (*av_fetch (av, i, 0));
		359	}
		360	break;
		361
		362	case EIO_NOP:
		363	case EIO_BUSY:
		364	break;
		365
		366	case EIO_READLINK:
		367	if (req->result > 0)
		368	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		369	break;
		370
		371	case EIO_STAT:
		372	case EIO_LSTAT:
		373	case EIO_FSTAT:
		374	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		375	PL_laststatval = req->result;
		376	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		377	PUSHs (sv_2mortal (newSViv (req->result)));
		378	break;
		379
		380	case EIO_READ:
		381	{
		382	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		383	*SvEND (req->sv2) = 0;
		384	SvPOK_only (req->sv2);
		385	SvSETMAGIC (req->sv2);
		386	PUSHs (sv_2mortal (newSViv (req->result)));
		387	}
		388	break;
		389
		390	case EIO_DUP2:
		391	if (req->result > 0)
		392	req->result = 0;
		393	/* FALLTHROUGH */
		394
		395	default:
		396	PUSHs (sv_2mortal (newSViv (req->result)));
		397	break;
		398	}
		399
		400	errno = req->errorno;
		401
		402	PUTBACK;
		403	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		404	SPAGAIN;
		405
		406	FREETMPS;
		407	LEAVE;
		408
		409	PUTBACK;
		410	}
		411
		412	return !!SvTRUE (ERRSV);
		413	}
		414
123	static void req_free (aio_req req)	415	static void req_destroy (aio_req req)
124	{	416	{
125	if (req->self)	417	if (req->self)
126	{	418	{
127	sv_unmagic (req->self, PERL_MAGIC_ext);	419	sv_unmagic (req->self, PERL_MAGIC_ext);
128	SvREFCNT_dec (req->self);	420	SvREFCNT_dec (req->self);
129	}	421	}
130		422
131	if (req->data)
132	SvREFCNT_dec (req->data);
133
134	if (req->fh)
135	SvREFCNT_dec (req->fh);	423	SvREFCNT_dec (req->sv1);
136
137	if (req->fh2)
138	SvREFCNT_dec (req->fh2);	424	SvREFCNT_dec (req->sv2);
139
140	if (req->statdata)
141	Safefree (req->statdata);
142
143	if (req->callback)
144	SvREFCNT_dec (req->callback);	425	SvREFCNT_dec (req->callback);
145
146	if (req->type == REQ_READDIR && req->result >= 0)
147	free (req->data2ptr);
148		426
149	Safefree (req);	427	Safefree (req);
150	}	428	}
151		429
		430	static void req_cancel_subs (aio_req grp)
		431	{
		432	aio_req sub;
		433
		434	if (grp->type != EIO_GROUP)
		435	return;
		436
		437	SvREFCNT_dec (grp->sv2);
		438	grp->sv2 = 0;
		439
		440	eio_grp_cancel (grp);
		441	}
		442
		443	#ifdef USE_SOCKETS_AS_HANDLES
		444	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		445	#else
		446	# define TO_SOCKET(x) (x)
		447	#endif
		448
152	static void	449	static void
153	poll_wait ()	450	create_respipe (void)
154	{	451	{
155	if (nreqs && !ress)	452	int old_readfd = respipe [0];
		453
		454	if (respipe [1] >= 0)
		455	respipe_close (TO_SOCKET (respipe [1]));
		456
		457	#ifdef _WIN32
		458	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		459	#else
		460	if (pipe (respipe))
		461	#endif
		462	croak ("unable to initialize result pipe");
		463
		464	if (old_readfd >= 0)
156	{	465	{
157	fd_set rfd;	466	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
158	FD_ZERO(&rfd);	467	croak ("unable to initialize result pipe(2)");
159	FD_SET(respipe [0], &rfd);
160		468
161	select (respipe [0] + 1, &rfd, 0, 0, 0);	469	respipe_close (respipe [0]);
		470	respipe [0] = old_readfd;
162	}	471	}
163	}
164		472
165	static int	473	#ifdef _WIN32
166	poll_cb ()	474	int arg = 1;
167	{	475	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
168	dSP;	476	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
169	int count = 0;	477	#else
170	int do_croak = 0;	478	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
171	aio_req req;	479	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		480	#endif
		481	croak ("unable to initialize result pipe(3)");
172		482
		483	respipe_osf [0] = TO_SOCKET (respipe [0]);
		484	respipe_osf [1] = TO_SOCKET (respipe [1]);
		485	}
		486
		487	static void poll_wait (void)
		488	{
		489	fd_set rfd;
		490
		491	while (eio_nreqs ())
		492	{
		493	int size;
		494
		495	X_LOCK (reslock);
		496	size = res_queue.size;
		497	X_UNLOCK (reslock);
		498
		499	if (size)
		500	return;
		501
		502	etp_maybe_start_thread ();
		503
		504	FD_ZERO (&rfd);
		505	FD_SET (respipe [0], &rfd);
		506
		507	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		508	}
		509	}
		510
		511	static int poll_cb (void)
		512	{
173	for (;;)	513	for (;;)
174	{	514	{
175	pthread_mutex_lock (&reslock);	515	int res = eio_poll ();
176	req = ress;
177		516
178	if (req)	517	if (res > 0)
179	{
180	ress = req->next;
181
182	if (!ress)
183	{
184	/* read any signals sent by the worker threads */
185	char buf [32];
186	while (read (respipe [0], buf, 32) == 32)
187	;
188
189	rese = 0;
190	}
191	}
192
193	pthread_mutex_unlock (&reslock);
194
195	if (!req)
196	break;
197
198	nreqs--;
199
200	if (req->type == REQ_QUIT)
201	started--;
202	else
203	{
204	int errorno = errno;
205	errno = req->errorno;
206
207	if (req->type == REQ_READ)
208	SvCUR_set (req->data, req->dataoffset + (req->result > 0 ? req->result : 0));
209
210	if (req->data2ptr && (req->type == REQ_READ || req->type == REQ_WRITE))
211	SvREADONLY_off (req->data);
212
213	if (req->statdata)
214	{
215	PL_laststype = req->type == REQ_LSTAT ? OP_LSTAT : OP_STAT;
216	PL_laststatval = req->result;
217	PL_statcache = *(req->statdata);
218	}
219
220	ENTER;
221	PUSHMARK (SP);
222
223	if (req->type == REQ_READDIR)
224	{
225	SV *rv = &PL_sv_undef;
226
227	if (req->result >= 0)
228	{
229	char *buf = req->data2ptr;
230	AV *av = newAV ();
231
232	while (req->result)
233	{
234	SV *sv = newSVpv (buf, 0);
235
236	av_push (av, sv);
237	buf += SvCUR (sv) + 1;
238	req->result--;
239	}
240
241	rv = sv_2mortal (newRV_noinc ((SV *)av));
242	}
243
244	XPUSHs (rv);
245	}
246	else
247	{
248	XPUSHs (sv_2mortal (newSViv (req->result)));
249
250	if (req->type == REQ_OPEN)
251	{
252	/* convert fd to fh */
253	SV *fh;
254
255	PUTBACK;
256	call_pv ("IO::AIO::_fd2fh", G_SCALAR | G_EVAL);
257	SPAGAIN;
258
259	fh = SvREFCNT_inc (POPs);
260
261	PUSHMARK (SP);
262	XPUSHs (sv_2mortal (fh));
263	}
264	}
265
266	if (SvOK (req->callback) && !req->cancelled)
267	{
268	PUTBACK;
269	call_sv (req->callback, G_VOID | G_EVAL);
270	SPAGAIN;
271
272	if (SvTRUE (ERRSV))
273	{
274	req_free (req);
275	croak (0);	518	croak (0);
276	}
277	}
278		519
279	LEAVE;	520	if (!max_outstanding || max_outstanding > eio_nreqs ())
		521	return res;
280		522
281	errno = errorno;	523	poll_wait ();
282	count++;
283	}
284
285	req_free (req);
286	}	524	}
287
288	return count;
289	}	525	}
290		526
291	static void *aio_proc(void *arg);	527	static void atfork_child (void)
292
293	static void
294	start_thread (void)
295	{	528	{
296	sigset_t fullsigset, oldsigset;	529	create_respipe ();
297	pthread_t tid;
298	pthread_attr_t attr;
299
300	pthread_attr_init (&attr);
301	pthread_attr_setstacksize (&attr, STACKSIZE);
302	pthread_attr_setdetachstate (&attr, PTHREAD_CREATE_DETACHED);
303
304	sigfillset (&fullsigset);
305	sigprocmask (SIG_SETMASK, &fullsigset, &oldsigset);
306
307	if (pthread_create (&tid, &attr, aio_proc, 0) == 0)
308	started++;
309
310	sigprocmask (SIG_SETMASK, &oldsigset, 0);
311	}	530	}
312		531
313	static void	532	static SV *
314	req_send (aio_req req)	533	get_cb (SV *cb_sv)
315	{	534	{
316	while (started < wanted && nreqs >= started)	535	HV *st;
317	start_thread ();	536	GV *gvp;
		537	CV *cv;
318		538
319	nreqs++;	539	if (!SvOK (cb_sv))
320
321	pthread_mutex_lock (&reqlock);
322
323	req->next = 0;
324
325	if (reqe)
326	{
327	reqe->next = req;
328	reqe = req;
329	}
330	else
331	reqe = reqs = req;
332
333	pthread_cond_signal (&reqwait);
334	pthread_mutex_unlock (&reqlock);
335
336	if (nreqs > max_outstanding)
337	for (;;)
338	{
339	poll_cb ();
340
341	if (nreqs <= max_outstanding)
342	break;
343
344	poll_wait ();
345	}
346	}
347
348	static void
349	end_thread (void)
350	{
351	aio_req req;
352	Newz (0, req, 1, aio_cb);
353	req->type = REQ_QUIT;
354
355	req_send (req);
356	}
357
358	static void min_parallel (int nthreads)
359	{
360	if (wanted < nthreads)
361	wanted = nthreads;
362	}
363
364	static void max_parallel (int nthreads)
365	{
366	int cur = started;
367
368	if (wanted > nthreads)
369	wanted = nthreads;
370
371	while (cur > wanted)
372	{
373	end_thread ();
374	cur--;
375	}
376
377	while (started > wanted)
378	{
379	poll_wait ();
380	poll_cb ();
381	}
382	}
383
384	static void create_pipe ()
385	{
386	if (pipe (respipe))
387	croak ("unable to initialize result pipe");
388
389	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
390	croak ("cannot set result pipe to nonblocking mode");
391
392	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
393	croak ("cannot set result pipe to nonblocking mode");
394	}
395
396	/*****************************************************************************/
397	/* work around various missing functions */
398
399	#if !HAVE_PREADWRITE
400	# define pread aio_pread
401	# define pwrite aio_pwrite
402
403	/*
404	* make our pread/pwrite safe against themselves, but not against
405	* normal read/write by using a mutex. slows down execution a lot,
406	* but that's your problem, not mine.
407	*/
408	static pthread_mutex_t preadwritelock = PTHREAD_MUTEX_INITIALIZER;
409
410	static ssize_t
411	pread (int fd, void *buf, size_t count, off_t offset)
412	{
413	ssize_t res;
414	off_t ooffset;
415
416	pthread_mutex_lock (&preadwritelock);
417	ooffset = lseek (fd, 0, SEEK_CUR);
418	lseek (fd, offset, SEEK_SET);
419	res = read (fd, buf, count);
420	lseek (fd, ooffset, SEEK_SET);
421	pthread_mutex_unlock (&preadwritelock);
422
423	return res;
424	}
425
426	static ssize_t
427	pwrite (int fd, void *buf, size_t count, off_t offset)
428	{
429	ssize_t res;
430	off_t ooffset;
431
432	pthread_mutex_lock (&preadwritelock);
433	ooffset = lseek (fd, 0, SEEK_CUR);
434	lseek (fd, offset, SEEK_SET);
435	res = write (fd, buf, count);
436	lseek (fd, offset, SEEK_SET);
437	pthread_mutex_unlock (&preadwritelock);
438
439	return res;
440	}
441	#endif
442
443	#if !HAVE_FDATASYNC
444	# define fdatasync fsync
445	#endif
446
447	#if !HAVE_READAHEAD
448	# define readahead aio_readahead
449
450	static ssize_t
451	readahead (int fd, off_t offset, size_t count)
452	{
453	char readahead_buf[4096];
454
455	while (count > 0)
456	{
457	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);
458
459	pread (fd, readahead_buf, len, offset);
460	offset += len;
461	count -= len;
462	}
463
464	errno = 0;
465	}
466	#endif
467
468	#if !HAVE_READDIR_R
469	# define readdir_r aio_readdir_r
470
471	static pthread_mutex_t readdirlock = PTHREAD_MUTEX_INITIALIZER;
472
473	static int
474	readdir_r (DIR *dirp, struct dirent *ent, struct dirent **res)
475	{
476	struct dirent *e;
477	int errorno;
478
479	pthread_mutex_lock (&readdirlock);
480
481	e = readdir (dirp);
482	errorno = errno;
483
484	if (e)
485	{
486	*res = ent;
487	strcpy (ent->d_name, e->d_name);
488	}
489	else
490	*res = 0;
491
492	pthread_mutex_unlock (&readdirlock);
493
494	errno = errorno;
495	return e ? 0 : -1;
496	}
497	#endif
498
499	/* sendfile always needs emulation */
500	static ssize_t
501	sendfile_ (int ofd, int ifd, off_t offset, size_t count)
502	{
503	ssize_t res;
504
505	if (!count)
506	return 0;	540	return 0;
507		541
508	#if HAVE_SENDFILE	542	cv = sv_2cv (cb_sv, &st, &gvp, 0);
509	# if __linux
510	res = sendfile (ofd, ifd, &offset, count);
511		543
512	# elif __freebsd	544	if (!cv)
513	/*	545	croak ("IO::AIO callback must be undef or a CODE reference");
514	* Of course, the freebsd sendfile is a dire hack with no thoughts
515	* wasted on making it similar to other I/O functions.
516	*/
517	{
518	off_t sbytes;
519	res = sendfile (ifd, ofd, offset, count, 0, &sbytes, 0);
520		546
521	if (res < 0 && sbytes)	547	return (SV *)cv;
522	/* maybe only on EAGAIN only: as usual, the manpage leaves you guessing */
523	res = sbytes;
524	}
525
526	# elif __hpux
527	res = sendfile (ofd, ifd, offset, count, 0, 0);
528
529	# elif __solaris
530	{
531	struct sendfilevec vec;
532	size_t sbytes;
533
534	vec.sfv_fd = ifd;
535	vec.sfv_flag = 0;
536	vec.sfv_off = offset;
537	vec.sfv_len = count;
538
539	res = sendfilev (ofd, &vec, 1, &sbytes);
540
541	if (res < 0 && sbytes)
542	res = sbytes;
543	}
544
545	# endif
546	#else
547	res = -1;
548	errno = ENOSYS;
549	#endif
550
551	if (res < 0
552	&& (errno == ENOSYS || errno == EINVAL || errno == ENOTSOCK
553	#if __solaris
554	|| errno == EAFNOSUPPORT || errno == EPROTOTYPE
555	#endif
556	)
557	)
558	{
559	/* emulate sendfile. this is a major pain in the ass */
560	char buf[4096];
561	res = 0;
562
563	while (count)
564	{
565	ssize_t cnt;
566
567	cnt = pread (ifd, buf, count > 4096 ? 4096 : count, offset);
568
569	if (cnt <= 0)
570	{
571	if (cnt && !res) res = -1;
572	break;
573	}
574
575	cnt = write (ofd, buf, cnt);
576
577	if (cnt <= 0)
578	{
579	if (cnt && !res) res = -1;
580	break;
581	}
582
583	offset += cnt;
584	res += cnt;
585	count -= cnt;
586	}
587	}
588
589	return res;
590	}
591
592	/* read a full directory */
593	static int
594	scandir_ (const char *path, void **namesp)
595	{
596	DIR *dirp = opendir (path);
597	union
598	{
599	struct dirent d;
600	char b [offsetof (struct dirent, d_name) + NAME_MAX + 1];
601	} u;
602	struct dirent *entp;
603	char *name, *names;
604	int memlen = 4096;
605	int memofs = 0;
606	int res = 0;
607	int errorno;
608
609	if (!dirp)
610	return -1;
611
612	names = malloc (memlen);
613
614	for (;;)
615	{
616	errno = 0, readdir_r (dirp, &u.d, &entp);
617
618	if (!entp)
619	break;
620
621	name = entp->d_name;
622
623	if (name [0] != '.' || (name [1] && (name [1] != '.' || name [2])))
624	{
625	int len = strlen (name) + 1;
626
627	res++;
628
629	while (memofs + len > memlen)
630	{
631	memlen *= 2;
632	names = realloc (names, memlen);
633	if (!names)
634	break;
635	}
636
637	memcpy (names + memofs, name, len);
638	memofs += len;
639	}
640	}
641
642	errorno = errno;
643	closedir (dirp);
644
645	if (errorno)
646	{
647	free (names);
648	errno = errorno;
649	res = -1;
650	}
651
652	*namesp = (void *)names;
653	return res;
654	}
655
656	/*****************************************************************************/
657
658	static void *
659	aio_proc (void *thr_arg)
660	{
661	aio_req req;
662	int type;
663
664	do
665	{
666	pthread_mutex_lock (&reqlock);
667
668	for (;;)
669	{
670	req = reqs;
671
672	if (reqs)
673	{
674	reqs = reqs->next;
675	if (!reqs) reqe = 0;
676	}
677
678	if (req)
679	break;
680
681	pthread_cond_wait (&reqwait, &reqlock);
682	}
683
684	pthread_mutex_unlock (&reqlock);
685
686	errno = 0; /* strictly unnecessary */
687
688	if (!req->cancelled)
689	switch (req->type)
690	{
691	case REQ_READ: req->result = pread (req->fd, req->dataptr, req->length, req->offset); break;
692	case REQ_WRITE: req->result = pwrite (req->fd, req->dataptr, req->length, req->offset); break;
693
694	case REQ_READAHEAD: req->result = readahead (req->fd, req->offset, req->length); break;
695	case REQ_SENDFILE: req->result = sendfile_ (req->fd, req->fd2, req->offset, req->length); break;
696
697	case REQ_STAT: req->result = stat (req->dataptr, req->statdata); break;
698	case REQ_LSTAT: req->result = lstat (req->dataptr, req->statdata); break;
699	case REQ_FSTAT: req->result = fstat (req->fd , req->statdata); break;
700
701	case REQ_OPEN: req->result = open (req->dataptr, req->fd, req->mode); break;
702	case REQ_CLOSE: req->result = close (req->fd); break;
703	case REQ_UNLINK: req->result = unlink (req->dataptr); break;
704	case REQ_RMDIR: req->result = rmdir (req->dataptr); break;
705	case REQ_RENAME: req->result = rename (req->data2ptr, req->dataptr); break;
706	case REQ_LINK: req->result = link (req->data2ptr, req->dataptr); break;
707	case REQ_SYMLINK: req->result = symlink (req->data2ptr, req->dataptr); break;
708
709	case REQ_FDATASYNC: req->result = fdatasync (req->fd); break;
710	case REQ_FSYNC: req->result = fsync (req->fd); break;
711	case REQ_READDIR: req->result = scandir_ (req->dataptr, &req->data2ptr); break;
712
713	case REQ_QUIT:
714	break;
715
716	default:
717	req->result = ENOSYS;
718	break;
719	}
720
721	req->errorno = errno;
722
723	pthread_mutex_lock (&reslock);
724
725	req->next = 0;
726
727	if (rese)
728	{
729	rese->next = req;
730	rese = req;
731	}
732	else
733	{
734	rese = ress = req;
735
736	/* write a dummy byte to the pipe so fh becomes ready */
737	write (respipe [1], &respipe, 1);
738	}
739
740	pthread_mutex_unlock (&reslock);
741	}
742	while (type != REQ_QUIT);
743
744	return 0;
745	}
746
747	/*****************************************************************************/
748
749	static void atfork_prepare (void)
750	{
751	pthread_mutex_lock (&reqlock);
752	pthread_mutex_lock (&reslock);
753	#if !HAVE_PREADWRITE
754	pthread_mutex_lock (&preadwritelock);
755	#endif
756	#if !HAVE_READDIR_R
757	pthread_mutex_lock (&readdirlock);
758	#endif
759	}
760
761	static void atfork_parent (void)
762	{
763	#if !HAVE_READDIR_R
764	pthread_mutex_unlock (&readdirlock);
765	#endif
766	#if !HAVE_PREADWRITE
767	pthread_mutex_unlock (&preadwritelock);
768	#endif
769	pthread_mutex_unlock (&reslock);
770	pthread_mutex_unlock (&reqlock);
771	}
772
773	static void atfork_child (void)
774	{
775	aio_req prv;
776
777	started = 0;
778
779	while (reqs)
780	{
781	prv = reqs;
782	reqs = prv->next;
783	req_free (prv);
784	}
785
786	reqs = reqe = 0;
787
788	while (ress)
789	{
790	prv = ress;
791	ress = prv->next;
792	req_free (prv);
793	}
794
795	ress = rese = 0;
796
797	close (respipe [0]);
798	close (respipe [1]);
799	create_pipe ();
800
801	atfork_parent ();
802	}	548	}
803		549
804	#define dREQ \	550	#define dREQ \
		551	SV *cb_cv; \
805	aio_req req; \	552	aio_req req; \
		553	int req_pri = next_pri; \
		554	next_pri = EIO_PRI_DEFAULT; \
806	\	555	\
807	if (SvOK (callback) && !SvROK (callback)) \	556	cb_cv = get_cb (callback); \
808	croak ("callback must be undef or of reference type"); \
809	\	557	\
810	Newz (0, req, 1, aio_cb); \	558	Newz (0, req, 1, eio_req); \
811	if (!req) \	559	if (!req) \
812	croak ("out of memory during aio_req allocation"); \	560	croak ("out of memory during eio_req allocation"); \
813	\	561	\
814	req->callback = newSVsv (callback)	562	req->callback = SvREFCNT_inc (cb_cv); \
		563	req->pri = req_pri
815		564
816	#define REQ_SEND \	565	#define REQ_SEND \
		566	PUTBACK; \
817	req_send (req); \	567	req_submit (req); \
		568	SPAGAIN; \
818	\	569	\
819	if (GIMME_V != G_VOID) \	570	if (GIMME_V != G_VOID) \
820	XPUSHs (req_sv (req, AIO_REQ_KLASS));	571	XPUSHs (req_sv (req, AIO_REQ_KLASS));
821		572
		573	static int
		574	extract_fd (SV *fh, int wr)
		575	{
		576	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
		577
		578	if (fd < 0)
		579	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
		580
		581	return fd;
		582	}
		583
822	MODULE = IO::AIO PACKAGE = IO::AIO	584	MODULE = IO::AIO PACKAGE = IO::AIO
823		585
824	PROTOTYPES: ENABLE	586	PROTOTYPES: ENABLE
825		587
826	BOOT:	588	BOOT:
827	{	589	{
		590	static const struct {
		591	const char *name;
		592	IV iv;
		593	} *civ, const_iv[] = {
		594	# define const_iv(name, value) { # name, (IV) value },
		595	# define const_eio(name) { # name, (IV) EIO_ ## name },
		596	const_iv (EXDEV , EXDEV)
		597	const_iv (ENOSYS , ENOSYS)
		598	const_iv (O_RDONLY, O_RDONLY)
		599	const_iv (O_WRONLY, O_WRONLY)
		600	const_iv (O_CREAT , O_CREAT)
		601	const_iv (O_TRUNC , O_TRUNC)
		602	#ifndef _WIN32
		603	const_iv (S_IFIFO , S_IFIFO)
		604	#endif
		605	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		606	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		607	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		608	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		609	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		610	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
		611
		612	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
		613	const_eio (SYNC_FILE_RANGE_WRITE)
		614	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
		615
		616	const_eio (READDIR_DENTS)
		617	const_eio (READDIR_DIRS_FIRST)
		618	const_eio (READDIR_STAT_ORDER)
		619	const_eio (READDIR_FOUND_UNKNOWN)
		620
		621	const_eio (DT_UNKNOWN)
		622	const_eio (DT_FIFO)
		623	const_eio (DT_CHR)
		624	const_eio (DT_DIR)
		625	const_eio (DT_BLK)
		626	const_eio (DT_REG)
		627	const_eio (DT_LNK)
		628	const_eio (DT_SOCK)
		629	const_eio (DT_WHT)
		630	};
		631
828	HV *stash = gv_stashpv ("IO::AIO", 1);	632	stash = gv_stashpv ("IO::AIO", 1);
829	newCONSTSUB (stash, "EXDEV", newSViv (EXDEV));
830	newCONSTSUB (stash, "O_RDONLY", newSViv (O_RDONLY));
831	newCONSTSUB (stash, "O_WRONLY", newSViv (O_WRONLY));
832		633
		634	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
		635	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
		636
833	create_pipe ();	637	create_respipe ();
834	pthread_atfork (atfork_prepare, atfork_parent, atfork_child);
835	}
836		638
		639	if (eio_init (want_poll, done_poll) < 0)
		640	croak ("IO::AIO: unable to initialise eio library");
		641
		642	/* atfork child called in fifo order, so before eio's handler */
		643	X_THREAD_ATFORK (0, 0, atfork_child);
		644	}
		645
837	void	646	void
838	min_parallel (nthreads)	647	max_poll_reqs (int nreqs)
839	int nthreads
840	PROTOTYPE: $	648	PROTOTYPE: $
		649	CODE:
		650	eio_set_max_poll_reqs (nreqs);
841		651
842	void	652	void
843	max_parallel (nthreads)	653	max_poll_time (double nseconds)
844	int nthreads
845	PROTOTYPE: $	654	PROTOTYPE: $
846
847	int
848	max_outstanding (nreqs)
849	int nreqs
850	PROTOTYPE: $
851	CODE:	655	CODE:
852	RETVAL = max_outstanding;	656	eio_set_max_poll_time (nseconds);
		657
		658	void
		659	min_parallel (int nthreads)
		660	PROTOTYPE: $
		661	CODE:
		662	eio_set_min_parallel (nthreads);
		663
		664	void
		665	max_parallel (int nthreads)
		666	PROTOTYPE: $
		667	CODE:
		668	eio_set_max_parallel (nthreads);
		669
		670	void
		671	max_idle (int nthreads)
		672	PROTOTYPE: $
		673	CODE:
		674	eio_set_max_idle (nthreads);
		675
		676	void
		677	max_outstanding (int maxreqs)
		678	PROTOTYPE: $
		679	CODE:
853	max_outstanding = nreqs;	680	max_outstanding = maxreqs;
854		681
855	void	682	void
856	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	683	aio_open (SV8 *pathname, int flags, int mode, SV *callback=&PL_sv_undef)
857	SV * pathname
858	int flags
859	int mode
860	SV * callback
861	PROTOTYPE: $$$;$	684	PROTOTYPE: $$$;$
862	PPCODE:	685	PPCODE:
863	{	686	{
864	dREQ;	687	dREQ;
865		688
866	req->type = REQ_OPEN;	689	req->type = EIO_OPEN;
867	req->data = newSVsv (pathname);	690	req->sv1 = newSVsv (pathname);
868	req->dataptr = SvPVbyte_nolen (req->data);	691	req->ptr1 = SvPVbyte_nolen (req->sv1);
869	req->fd = flags;	692	req->int1 = flags;
870	req->mode = mode;	693	req->int2 = mode;
871		694
872	REQ_SEND;	695	REQ_SEND;
873	}	696	}
874		697
875	void	698	void
876	aio_close (fh,callback=&PL_sv_undef)	699	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
877	SV * fh
878	SV * callback
879	PROTOTYPE: $;$	700	PROTOTYPE: $;$
880	ALIAS:	701	ALIAS:
881	aio_close = REQ_CLOSE
882	aio_fsync = REQ_FSYNC	702	aio_fsync = EIO_FSYNC
883	aio_fdatasync = REQ_FDATASYNC	703	aio_fdatasync = EIO_FDATASYNC
884	PPCODE:	704	PPCODE:
885	{	705	{
		706	int fd = extract_fd (fh, 0);
886	dREQ;	707	dREQ;
887		708
888	req->type = ix;	709	req->type = ix;
889	req->fh = newSVsv (fh);	710	req->sv1 = newSVsv (fh);
890	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	711	req->int1 = fd;
891		712
892	REQ_SEND (req);	713	REQ_SEND (req);
893	}	714	}
894		715
895	void	716	void
		717	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		718	PROTOTYPE: $$$$;$
		719	PPCODE:
		720	{
		721	int fd = extract_fd (fh, 0);
		722	dREQ;
		723
		724	req->type = EIO_SYNC_FILE_RANGE;
		725	req->sv1 = newSVsv (fh);
		726	req->int1 = fd;
		727	req->offs = offset;
		728	req->size = nbytes;
		729	req->int2 = flags;
		730
		731	REQ_SEND (req);
		732	}
		733
		734	void
		735	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		736	PROTOTYPE: $;$
		737	PPCODE:
		738	{
		739	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		740	int fd = extract_fd (fh, 0);
		741	dREQ;
		742
		743	if (close_pipe < 0)
		744	{
		745	int pipefd [2];
		746
		747	if (pipe (pipefd) < 0
		748	|| close (pipefd [1]) < 0
		749	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		750	abort (); /*D*/
		751
		752	close_pipe = pipefd [0];
		753	}
		754
		755	req->type = EIO_DUP2;
		756	req->int1 = close_pipe;
		757	req->sv2 = newSVsv (fh);
		758	req->int2 = fd;
		759
		760	REQ_SEND (req);
		761	}
		762
		763	void
896	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	764	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
897	SV * fh
898	UV offset
899	UV length
900	SV * data
901	UV dataoffset
902	SV * callback
903	ALIAS:	765	ALIAS:
904	aio_read = REQ_READ	766	aio_read = EIO_READ
905	aio_write = REQ_WRITE	767	aio_write = EIO_WRITE
906	PROTOTYPE: $$$$$;$	768	PROTOTYPE: $$$$$;$
907	PPCODE:	769	PPCODE:
908	{	770	{
909	aio_req req;
910	STRLEN svlen;	771	STRLEN svlen;
		772	int fd = extract_fd (fh, ix == EIO_WRITE);
911	char *svptr = SvPVbyte (data, svlen);	773	char *svptr = SvPVbyte (data, svlen);
912		774	UV len = SvUV (length);
913	SvUPGRADE (data, SVt_PV);
914	SvPOK_on (data);
915		775
916	if (dataoffset < 0)	776	if (dataoffset < 0)
917	dataoffset += svlen;	777	dataoffset += svlen;
918		778
919	if (dataoffset < 0 || dataoffset > svlen)	779	if (dataoffset < 0 || dataoffset > svlen)
920	croak ("data offset outside of string");	780	croak ("dataoffset outside of data scalar");
921		781
922	if (ix == REQ_WRITE)	782	if (ix == EIO_WRITE)
923	{	783	{
924	/* write: check length and adjust. */	784	/* write: check length and adjust. */
925	if (length < 0 || length + dataoffset > svlen)	785	if (!SvOK (length) || len + dataoffset > svlen)
926	length = svlen - dataoffset;	786	len = svlen - dataoffset;
927	}	787	}
928	else	788	else
929	{	789	{
930	/* read: grow scalar as necessary */	790	/* read: check type and grow scalar as necessary */
		791	SvUPGRADE (data, SVt_PV);
931	svptr = SvGROW (data, length + dataoffset);	792	svptr = SvGROW (data, len + dataoffset + 1);
932	}	793	}
933
934	if (length < 0)
935	croak ("length must not be negative");
936		794
937	{	795	{
938	dREQ;	796	dREQ;
939		797
940	req->type = ix;	798	req->type = ix;
941	req->fh = newSVsv (fh);	799	req->sv1 = newSVsv (fh);
942	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	800	req->int1 = fd;
943	: IoOFP (sv_2io (fh)));	801	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
944	req->offset = offset;	802	req->size = len;
945	req->length = length;
946	req->data = SvREFCNT_inc (data);	803	req->sv2 = SvREFCNT_inc (data);
947	req->dataptr = (char *)svptr + dataoffset;	804	req->ptr2 = (char *)svptr + dataoffset;
		805	req->stroffset = dataoffset;
948		806
949	if (!SvREADONLY (data))	807	if (!SvREADONLY (data))
950	{	808	{
951	SvREADONLY_on (data);	809	SvREADONLY_on (data);
952	req->data2ptr = (void *)data;	810	req->flags |= FLAG_SV2_RO_OFF;
953	}	811	}
954		812
955	REQ_SEND;	813	REQ_SEND;
956	}	814	}
957	}	815	}
958		816
959	void	817	void
		818	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		819	PROTOTYPE: $$;$
		820	PPCODE:
		821	{
		822	SV *data;
		823	dREQ;
		824
		825	req->type = EIO_READLINK;
		826	req->sv1 = newSVsv (path);
		827	req->ptr1 = SvPVbyte_nolen (req->sv1);
		828
		829	REQ_SEND;
		830	}
		831
		832	void
960	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	833	aio_sendfile (SV *out_fh, SV *in_fh, off_t in_offset, size_t length, SV *callback=&PL_sv_undef)
961	SV * out_fh
962	SV * in_fh
963	UV in_offset
964	UV length
965	SV * callback
966	PROTOTYPE: $$$$;$	834	PROTOTYPE: $$$$;$
967	PPCODE:	835	PPCODE:
968	{	836	{
		837	int ifd = extract_fd (in_fh , 0);
		838	int ofd = extract_fd (out_fh, 0);
969	dREQ;	839	dREQ;
970		840
971	req->type = REQ_SENDFILE;	841	req->type = EIO_SENDFILE;
972	req->fh = newSVsv (out_fh);	842	req->sv1 = newSVsv (out_fh);
973	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	843	req->int1 = ofd;
974	req->fh2 = newSVsv (in_fh);	844	req->sv2 = newSVsv (in_fh);
975	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	845	req->int2 = ifd;
976	req->offset = in_offset;	846	req->offs = in_offset;
977	req->length = length;	847	req->size = length;
978		848
979	REQ_SEND;	849	REQ_SEND;
980	}	850	}
981		851
982	void	852	void
983	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	853	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
984	SV * fh
985	UV offset
986	IV length
987	SV * callback
988	PROTOTYPE: $$$;$	854	PROTOTYPE: $$$;$
989	PPCODE:	855	PPCODE:
990	{	856	{
		857	int fd = extract_fd (fh, 0);
991	dREQ;	858	dREQ;
992		859
993	req->type = REQ_READAHEAD;	860	req->type = EIO_READAHEAD;
994	req->fh = newSVsv (fh);	861	req->sv1 = newSVsv (fh);
995	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	862	req->int1 = fd;
996	req->offset = offset;	863	req->offs = offset;
997	req->length = length;	864	req->size = length;
998		865
999	REQ_SEND;	866	REQ_SEND;
1000	}	867	}
1001		868
1002	void	869	void
1003	aio_stat (fh_or_path,callback=&PL_sv_undef)	870	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
1004	SV * fh_or_path
1005	SV * callback
1006	ALIAS:	871	ALIAS:
1007	aio_stat = REQ_STAT	872	aio_stat = EIO_STAT
1008	aio_lstat = REQ_LSTAT	873	aio_lstat = EIO_LSTAT
1009	PPCODE:	874	PPCODE:
1010	{	875	{
1011	dREQ;	876	dREQ;
1012		877
1013	New (0, req->statdata, 1, Stat_t);	878	req->sv1 = newSVsv (fh_or_path);
1014	if (!req->statdata)
1015	{
1016	req_free (req);
1017	croak ("out of memory during aio_req->statdata allocation");
1018	}
1019		879
1020	if (SvPOK (fh_or_path))	880	if (SvPOK (req->sv1))
1021	{	881	{
1022	req->type = ix;	882	req->type = ix;
1023	req->data = newSVsv (fh_or_path);
1024	req->dataptr = SvPVbyte_nolen (req->data);	883	req->ptr1 = SvPVbyte_nolen (req->sv1);
1025	}	884	}
1026	else	885	else
1027	{	886	{
1028	req->type = REQ_FSTAT;	887	req->type = EIO_FSTAT;
1029	req->fh = newSVsv (fh_or_path);
1030	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	888	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
1031	}	889	}
1032		890
1033	REQ_SEND;	891	REQ_SEND;
1034	}	892	}
1035		893
1036	void	894	void
		895	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		896	PPCODE:
		897	{
		898	dREQ;
		899
		900	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		901	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		902	req->sv1 = newSVsv (fh_or_path);
		903
		904	if (SvPOK (req->sv1))
		905	{
		906	req->type = EIO_UTIME;
		907	req->ptr1 = SvPVbyte_nolen (req->sv1);
		908	}
		909	else
		910	{
		911	req->type = EIO_FUTIME;
		912	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		913	}
		914
		915	REQ_SEND;
		916	}
		917
		918	void
		919	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		920	PPCODE:
		921	{
		922	dREQ;
		923
		924	req->sv1 = newSVsv (fh_or_path);
		925	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		926
		927	if (SvPOK (req->sv1))
		928	{
		929	req->type = EIO_TRUNCATE;
		930	req->ptr1 = SvPVbyte_nolen (req->sv1);
		931	}
		932	else
		933	{
		934	req->type = EIO_FTRUNCATE;
		935	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		936	}
		937
		938	REQ_SEND;
		939	}
		940
		941	void
		942	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		943	ALIAS:
		944	aio_chmod = EIO_CHMOD
		945	aio_mkdir = EIO_MKDIR
		946	PPCODE:
		947	{
		948	dREQ;
		949
		950	req->int2 = mode;
		951	req->sv1 = newSVsv (fh_or_path);
		952
		953	if (SvPOK (req->sv1))
		954	{
		955	req->type = ix;
		956	req->ptr1 = SvPVbyte_nolen (req->sv1);
		957	}
		958	else
		959	{
		960	req->type = EIO_FCHMOD;
		961	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		962	}
		963
		964	REQ_SEND;
		965	}
		966
		967	void
		968	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		969	PPCODE:
		970	{
		971	dREQ;
		972
		973	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		974	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		975	req->sv1 = newSVsv (fh_or_path);
		976
		977	if (SvPOK (req->sv1))
		978	{
		979	req->type = EIO_CHOWN;
		980	req->ptr1 = SvPVbyte_nolen (req->sv1);
		981	}
		982	else
		983	{
		984	req->type = EIO_FCHOWN;
		985	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		986	}
		987
		988	REQ_SEND;
		989	}
		990
		991	void
		992	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		993	PPCODE:
		994	{
		995	dREQ;
		996
		997	req->type = EIO_READDIR;
		998	req->sv1 = newSVsv (pathname);
		999	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1000	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1001
		1002	if (flags & EIO_READDIR_DENTS)
		1003	req->int1 |= EIO_READDIR_CUSTOM2;
		1004
		1005	REQ_SEND;
		1006	}
		1007
		1008	void
1037	aio_unlink (pathname,callback=&PL_sv_undef)	1009	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
1038	SV * pathname
1039	SV * callback
1040	ALIAS:	1010	ALIAS:
1041	aio_unlink = REQ_UNLINK	1011	aio_unlink = EIO_UNLINK
1042	aio_rmdir = REQ_RMDIR	1012	aio_rmdir = EIO_RMDIR
1043	aio_readdir = REQ_READDIR	1013	aio_readdir = EIO_READDIR
1044	PPCODE:	1014	PPCODE:
1045	{	1015	{
1046	dREQ;	1016	dREQ;
1047		1017
1048	req->type = ix;	1018	req->type = ix;
1049	req->data = newSVsv (pathname);	1019	req->sv1 = newSVsv (pathname);
1050	req->dataptr = SvPVbyte_nolen (req->data);	1020	req->ptr1 = SvPVbyte_nolen (req->sv1);
1051		1021
1052	REQ_SEND;	1022	REQ_SEND;
1053	}	1023	}
1054		1024
1055	void	1025	void
1056	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1026	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1057	SV * oldpath
1058	SV * newpath
1059	SV * callback
1060	ALIAS:	1027	ALIAS:
1061	aio_link = REQ_LINK	1028	aio_link = EIO_LINK
1062	aio_symlink = REQ_SYMLINK	1029	aio_symlink = EIO_SYMLINK
1063	aio_rename = REQ_RENAME	1030	aio_rename = EIO_RENAME
1064	PPCODE:	1031	PPCODE:
1065	{	1032	{
1066	dREQ;	1033	dREQ;
1067		1034
1068	req->type = ix;	1035	req->type = ix;
1069	req->fh = newSVsv (oldpath);	1036	req->sv1 = newSVsv (oldpath);
1070	req->data2ptr = SvPVbyte_nolen (req->fh);	1037	req->ptr1 = SvPVbyte_nolen (req->sv1);
1071	req->data = newSVsv (newpath);	1038	req->sv2 = newSVsv (newpath);
1072	req->dataptr = SvPVbyte_nolen (req->data);	1039	req->ptr2 = SvPVbyte_nolen (req->sv2);
1073		1040
1074	REQ_SEND;	1041	REQ_SEND;
1075	}	1042	}
1076		1043
1077	void	1044	void
		1045	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1046	PPCODE:
		1047	{
		1048	dREQ;
		1049
		1050	req->type = EIO_MKNOD;
		1051	req->sv1 = newSVsv (pathname);
		1052	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1053	req->int2 = (mode_t)mode;
		1054	req->offs = dev;
		1055
		1056	REQ_SEND;
		1057	}
		1058
		1059	void
		1060	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1061	PPCODE:
		1062	{
		1063	dREQ;
		1064
		1065	req->type = EIO_BUSY;
		1066	req->nv1 = delay < 0. ? 0. : delay;
		1067
		1068	REQ_SEND;
		1069	}
		1070
		1071	void
1078	aio_group (callback=&PL_sv_undef)	1072	aio_group (SV *callback=&PL_sv_undef)
1079	SV * callback
1080	PROTOTYPE: ;&	1073	PROTOTYPE: ;$
1081	PPCODE:	1074	PPCODE:
1082	{	1075	{
1083	dREQ;	1076	dREQ;
		1077
1084	req->type = REQ_GROUP;	1078	req->type = EIO_GROUP;
		1079
		1080	req_submit (req);
1085	XPUSHs (req_sv (req, AIO_GRP_KLASS));	1081	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1086	}	1082	}
		1083
		1084	void
		1085	aio_nop (SV *callback=&PL_sv_undef)
		1086	ALIAS:
		1087	aio_nop = EIO_NOP
		1088	aio_sync = EIO_SYNC
		1089	PPCODE:
		1090	{
		1091	dREQ;
		1092
		1093	req->type = ix;
		1094
		1095	REQ_SEND;
		1096	}
		1097
		1098	int
		1099	aioreq_pri (int pri = 0)
		1100	PROTOTYPE: ;$
		1101	CODE:
		1102	RETVAL = next_pri;
		1103	if (items > 0)
		1104	{
		1105	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1106	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1107	next_pri = pri;
		1108	}
		1109	OUTPUT:
		1110	RETVAL
		1111
		1112	void
		1113	aioreq_nice (int nice = 0)
		1114	CODE:
		1115	nice = next_pri - nice;
		1116	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1117	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1118	next_pri = nice;
1087		1119
1088	void	1120	void
1089	flush ()	1121	flush ()
1090	PROTOTYPE:	1122	PROTOTYPE:
1091	CODE:	1123	CODE:
1092	while (nreqs)	1124	while (eio_nreqs ())
1093	{	1125	{
1094	poll_wait ();	1126	poll_wait ();
1095	poll_cb ();	1127	poll_cb ();
1096	}	1128	}
1097		1129
1098	void	1130	int
1099	poll()	1131	poll()
1100	PROTOTYPE:	1132	PROTOTYPE:
1101	CODE:	1133	CODE:
1102	if (nreqs)
1103	{
1104	poll_wait ();	1134	poll_wait ();
1105	poll_cb ();	1135	RETVAL = poll_cb ();
1106	}	1136	OUTPUT:
		1137	RETVAL
1107		1138
1108	int	1139	int
1109	poll_fileno()	1140	poll_fileno()
1110	PROTOTYPE:	1141	PROTOTYPE:
1111	CODE:	1142	CODE:
…		…
1123		1154
1124	void	1155	void
1125	poll_wait()	1156	poll_wait()
1126	PROTOTYPE:	1157	PROTOTYPE:
1127	CODE:	1158	CODE:
1128	if (nreqs)
1129	poll_wait ();	1159	poll_wait ();
1130		1160
1131	int	1161	int
1132	nreqs()	1162	nreqs()
1133	PROTOTYPE:	1163	PROTOTYPE:
1134	CODE:	1164	CODE:
1135	RETVAL = nreqs;	1165	RETVAL = eio_nreqs ();
1136	OUTPUT:	1166	OUTPUT:
1137	RETVAL	1167	RETVAL
1138		1168
		1169	int
		1170	nready()
		1171	PROTOTYPE:
		1172	CODE:
		1173	RETVAL = eio_nready ();
		1174	OUTPUT:
		1175	RETVAL
		1176
		1177	int
		1178	npending()
		1179	PROTOTYPE:
		1180	CODE:
		1181	RETVAL = eio_npending ();
		1182	OUTPUT:
		1183	RETVAL
		1184
		1185	int
		1186	nthreads()
		1187	PROTOTYPE:
		1188	CODE:
		1189	RETVAL = eio_nthreads ();
		1190	OUTPUT:
		1191	RETVAL
		1192
		1193	int
		1194	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1195	PROTOTYPE: $$$$
		1196	CODE:
		1197	{
		1198	#if _XOPEN_SOURCE >= 600
		1199	RETVAL = posix_fadvise (fh, offset, length, advice);
		1200	#else
		1201	RETVAL = errno = ENOSYS;
		1202	#endif
		1203	}
		1204	OUTPUT:
		1205	RETVAL
		1206
		1207	ssize_t
		1208	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1209	PROTOTYPE: $$$$
		1210	CODE:
		1211	eio_sendfile_sync (ofh, ifh, offset, count);
		1212
		1213	void _on_next_submit (SV *cb)
		1214	CODE:
		1215	SvREFCNT_dec (on_next_submit);
		1216	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1217
		1218	PROTOTYPES: DISABLE
		1219
1139	MODULE = IO::AIO PACKAGE = IO::AIO::REQ	1220	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
1140		1221
1141	void	1222	void
1142	cancel (aio_req_ornot req)	1223	cancel (aio_req_ornot req)
1143	PROTOTYPE:	1224	CODE:
		1225	eio_cancel (req);
		1226
		1227	void
		1228	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
1144	CODE:	1229	PPCODE:
1145	req->cancelled = 1;	1230	{
		1231	if (GIMME_V != G_VOID)
		1232	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
1146		1233
		1234	if (items > 1)
		1235	{
		1236	SV *cb_cv = get_cb (callback);
		1237
		1238	SvREFCNT_dec (req->callback);
		1239	req->callback = SvREFCNT_inc (cb_cv);
		1240	}
		1241	}
		1242
		1243	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1244
		1245	void
		1246	add (aio_req grp, ...)
		1247	PPCODE:
		1248	{
		1249	int i;
		1250
		1251	if (grp->int1 == 2)
		1252	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1253
		1254	for (i = 1; i < items; ++i )
		1255	{
		1256	aio_req req;
		1257
		1258	if (GIMME_V != G_VOID)
		1259	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1260
		1261	req = SvAIO_REQ (ST (i));
		1262
		1263	if (req)
		1264	eio_grp_add (grp, req);
		1265	}
		1266	}
		1267
		1268	void
		1269	cancel_subs (aio_req_ornot req)
		1270	CODE:
		1271	req_cancel_subs (req);
		1272
		1273	void
		1274	result (aio_req grp, ...)
		1275	CODE:
		1276	{
		1277	int i;
		1278	AV *av;
		1279
		1280	grp->errorno = errno;
		1281
		1282	av = newAV ();
		1283	av_extend (av, items - 1);
		1284
		1285	for (i = 1; i < items; ++i )
		1286	av_push (av, newSVsv (ST (i)));
		1287
		1288	SvREFCNT_dec (grp->sv1);
		1289	grp->sv1 = (SV *)av;
		1290	}
		1291
		1292	void
		1293	errno (aio_req grp, int errorno = errno)
		1294	CODE:
		1295	grp->errorno = errorno;
		1296
		1297	void
		1298	limit (aio_req grp, int limit)
		1299	CODE:
		1300	eio_grp_limit (grp, limit);
		1301
		1302	void
		1303	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1304	CODE:
		1305	{
		1306	SvREFCNT_dec (grp->sv2);
		1307	grp->sv2 = newSVsv (callback);
		1308	grp->feed = aio_grp_feed;
		1309
		1310	if (grp->int2 <= 0)
		1311	grp->int2 = 2;
		1312
		1313	eio_grp_limit (grp, grp->int2);
		1314	}
		1315

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