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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.42 by root, Fri Jul 21 07:35:31 2006 UTC vs.
Revision 1.150 by root, Wed Jul 1 08:11:24 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
		97	#define expect_false(expr) expect ((expr) != 0, 0)
		98	#define expect_true(expr) expect ((expr) != 0, 1)
		99
		100	/*****************************************************************************/
		101
		102	static HV *stash;
		103	typedef SV SV8; /* byte-sv, used for argument-checking */
		104	typedef int aio_rfd; /* read file desriptor */
		105	typedef int aio_wfd; /* write file descriptor */
		106
		107	#define AIO_REQ_KLASS "IO::AIO::REQ"
		108	#define AIO_GRP_KLASS "IO::AIO::GRP"
		109
		110	#define EIO_REQ_MEMBERS \
		111	SV *callback; \
		112	SV *sv1, *sv2; \
		113	STRLEN stroffset; \
		114	SV *self;
		115
		116	#define EIO_NO_WRAPPERS 1
		117
		118	#include "libeio/eio.h"
		119
		120	#ifndef POSIX_FADV_NORMAL
		121	# define POSIX_FADV_NORMAL 0
		122	# define NO_FADVISE 1
		123	#endif
		124
		125	#ifndef POSIX_FADV_SEQUENTIAL
		126	# define POSIX_FADV_SEQUENTIAL 0
		127	#endif
		128
		129	#ifndef POSIX_FADV_RANDOM
		130	# define POSIX_FADV_RANDOM 0
		131	#endif
		132
		133	#ifndef POSIX_FADV_NOREUSE
		134	# define POSIX_FADV_NOREUSE 0
		135	#endif
		136
		137	#ifndef POSIX_FADV_WILLNEED
		138	# define POSIX_FADV_WILLNEED 0
		139	#endif
		140
		141	#ifndef POSIX_FADV_DONTNEED
		142	# define POSIX_FADV_DONTNEED 0
		143	#endif
		144
		145	static int req_invoke (eio_req *req);
		146	#define EIO_FINISH(req) req_invoke (req)
		147	static void req_destroy (eio_req *grp);
		148	#define EIO_DESTROY(req) req_destroy (req)
		149
48	enum {	150	enum {
49	REQ_QUIT,	151	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	};	152	};
59		153
60	typedef struct aio_cb {	154	#include "libeio/eio.c"
61	struct aio_cb *volatile next;
62		155
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;	156	typedef eio_req *aio_req;
		157	typedef eio_req *aio_req_ornot;
81		158
82	static int started, wanted;	159	static SV *on_next_submit;
83	static volatile int nreqs;	160	static int next_pri = EIO_PRI_DEFAULT;
84	static int max_outstanding = 1<<30;	161	static int max_outstanding;
85	static int respipe [2];
86		162
87	static pthread_mutex_t reslock = PTHREAD_MUTEX_INITIALIZER;	163	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		164
91	static volatile aio_req reqs, reqe; /* queue start, queue end */	165	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)	166	static void req_cancel (aio_req req);
95	{
96	if (req->data)
97	SvREFCNT_dec (req->data);
98		167
		168	static void want_poll (void)
		169	{
		170	/* write a dummy byte to the pipe so fh becomes ready */
		171	respipe_write (respipe_osf [1], (const void *)&respipe_osf, 1);
		172	}
		173
		174	static void done_poll (void)
		175	{
		176	/* read any signals sent by the worker threads */
		177	char buf [4];
		178	while (respipe_read (respipe [0], buf, 4) == 4)
		179	;
		180	}
		181
		182	/* must be called at most once */
		183	static SV *req_sv (aio_req req, const char *klass)
		184	{
		185	if (!req->self)
		186	{
		187	req->self = (SV *)newHV ();
		188	sv_magic (req->self, 0, PERL_MAGIC_ext, (char *)req, 0);
		189	}
		190
		191	return sv_2mortal (sv_bless (newRV_inc (req->self), gv_stashpv (klass, 1)));
		192	}
		193
		194	static aio_req SvAIO_REQ (SV *sv)
		195	{
		196	MAGIC *mg;
		197
		198	if (!sv_derived_from (sv, AIO_REQ_KLASS) || !SvROK (sv))
		199	croak ("object of class " AIO_REQ_KLASS " expected");
		200
		201	mg = mg_find (SvRV (sv), PERL_MAGIC_ext);
		202
		203	return mg ? (aio_req)mg->mg_ptr : 0;
		204	}
		205
		206	static void aio_grp_feed (aio_req grp)
		207	{
		208	if (grp->sv2 && SvOK (grp->sv2))
		209	{
		210	dSP;
		211
		212	ENTER;
		213	SAVETMPS;
		214	PUSHMARK (SP);
		215	XPUSHs (req_sv (grp, AIO_GRP_KLASS));
		216	PUTBACK;
		217	call_sv (grp->sv2, G_VOID | G_EVAL | G_KEEPERR);
		218	SPAGAIN;
		219	FREETMPS;
		220	LEAVE;
		221	}
		222	}
		223
		224	static void req_submit (eio_req *req)
		225	{
		226	eio_submit (req);
		227
		228	if (expect_false (on_next_submit))
		229	{
		230	dSP;
		231	SV *cb = sv_2mortal (on_next_submit);
		232
		233	on_next_submit = 0;
		234
		235	PUSHMARK (SP);
		236	PUTBACK;
		237	call_sv (cb, G_DISCARD | G_EVAL);
		238	}
		239	}
		240
		241	static int req_invoke (eio_req *req)
		242	{
		243	dSP;
		244
		245	if (req->flags & FLAG_SV2_RO_OFF)
		246	SvREADONLY_off (req->sv2);
		247
		248	if (!EIO_CANCELLED (req) && req->callback)
		249	{
		250	ENTER;
		251	SAVETMPS;
		252	PUSHMARK (SP);
		253	EXTEND (SP, 1);
		254
		255	switch (req->type)
		256	{
		257	case EIO_READDIR:
		258	{
		259	SV *rv = &PL_sv_undef;
		260
		261	if (req->result >= 0)
		262	{
		263	int i;
		264	char *names = (char *)req->ptr2;
		265	eio_dirent *ent = (eio_dirent *)req->ptr1; /* might be 0 */
		266	AV *av = newAV ();
		267
		268	av_extend (av, req->result - 1);
		269
		270	for (i = 0; i < req->result; ++i)
		271	{
		272	if (req->int1 & EIO_READDIR_DENTS)
		273	{
		274	SV *namesv = newSVpvn (names + ent->nameofs, ent->namelen);
		275
		276	if (req->int1 & EIO_READDIR_CUSTOM2)
		277	{
		278	static SV *sv_type [EIO_DT_MAX + 1]; /* type sv cache */
		279	AV *avent = newAV ();
		280
		281	av_extend (avent, 2);
		282
		283	if (!sv_type [ent->type])
		284	{
		285	sv_type [ent->type] = newSViv (ent->type);
		286	SvREADONLY_on (sv_type [ent->type]);
		287	}
		288
		289	av_store (avent, 0, namesv);
		290	av_store (avent, 1, SvREFCNT_inc (sv_type [ent->type]));
		291	av_store (avent, 2, IVSIZE >= 8 ? newSVuv (ent->inode) : newSVnv (ent->inode));
		292
		293	av_store (av, i, newRV_noinc ((SV *)avent));
		294	}
		295	else
		296	av_store (av, i, namesv);
		297
		298	++ent;
		299	}
		300	else
		301	{
		302	SV *name = newSVpv (names, 0);
		303	av_store (av, i, name);
		304	names += SvCUR (name) + 1;
		305	}
		306	}
		307
		308	rv = sv_2mortal (newRV_noinc ((SV *)av));
		309	}
		310
		311	PUSHs (rv);
		312
		313	if (req->int1 & EIO_READDIR_CUSTOM1)
		314	XPUSHs (sv_2mortal (newSViv (req->int1 & ~(EIO_READDIR_CUSTOM1 | EIO_READDIR_CUSTOM2))));
		315	}
		316	break;
		317
		318	case EIO_OPEN:
		319	{
		320	/* convert fd to fh */
		321	SV *fh = &PL_sv_undef;
		322
		323	if (req->result >= 0)
		324	{
		325	GV *gv = (GV *)sv_newmortal ();
		326	int flags = req->int1 & (O_RDONLY | O_WRONLY | O_RDWR);
		327	char sym [64];
		328	int symlen;
		329
		330	symlen = snprintf (sym, sizeof (sym), "fd#%d", (int)req->result);
		331	gv_init (gv, stash, sym, symlen, 0);
		332
		333	symlen = snprintf (
		334	sym,
		335	sizeof (sym),
		336	"%s&=%d",
		337	flags == O_RDONLY ? "<" : flags == O_WRONLY ? ">" : "+<",
		338	(int)req->result
		339	);
		340
		341	if (do_open (gv, sym, symlen, 0, 0, 0, 0))
		342	fh = (SV *)gv;
		343	}
		344
		345	PUSHs (fh);
		346	}
		347	break;
		348
		349	case EIO_GROUP:
		350	req->int1 = 2; /* mark group as finished */
		351
		352	if (req->sv1)
		353	{
		354	int i;
		355	AV *av = (AV *)req->sv1;
		356
		357	EXTEND (SP, AvFILL (av) + 1);
		358	for (i = 0; i <= AvFILL (av); ++i)
		359	PUSHs (*av_fetch (av, i, 0));
		360	}
		361	break;
		362
		363	case EIO_NOP:
		364	case EIO_BUSY:
		365	break;
		366
		367	case EIO_READLINK:
		368	if (req->result > 0)
		369	PUSHs (sv_2mortal (newSVpvn (req->ptr2, req->result)));
		370	break;
		371
		372	case EIO_STAT:
		373	case EIO_LSTAT:
		374	case EIO_FSTAT:
		375	PL_laststype = req->type == EIO_LSTAT ? OP_LSTAT : OP_STAT;
		376	PL_laststatval = req->result;
		377	PL_statcache = *(EIO_STRUCT_STAT *)(req->ptr2);
		378	PUSHs (sv_2mortal (newSViv (req->result)));
		379	break;
		380
		381	case EIO_READ:
		382	{
		383	SvCUR_set (req->sv2, req->stroffset + (req->result > 0 ? req->result : 0));
		384	*SvEND (req->sv2) = 0;
		385	SvPOK_only (req->sv2);
		386	SvSETMAGIC (req->sv2);
		387	PUSHs (sv_2mortal (newSViv (req->result)));
		388	}
		389	break;
		390
		391	case EIO_DUP2:
		392	if (req->result > 0)
		393	req->result = 0;
		394	/* FALLTHROUGH */
		395
		396	default:
		397	PUSHs (sv_2mortal (newSViv (req->result)));
		398	break;
		399	}
		400
		401	errno = req->errorno;
		402
		403	PUTBACK;
		404	call_sv (req->callback, G_VOID | G_EVAL | G_DISCARD);
		405	SPAGAIN;
		406
		407	FREETMPS;
		408	LEAVE;
		409
		410	PUTBACK;
		411	}
		412
		413	return !!SvTRUE (ERRSV);
		414	}
		415
		416	static void req_destroy (aio_req req)
		417	{
99	if (req->fh)	418	if (req->self)
		419	{
		420	sv_unmagic (req->self, PERL_MAGIC_ext);
100	SvREFCNT_dec (req->fh);	421	SvREFCNT_dec (req->self);
		422	}
101		423
102	if (req->fh2)	424	SvREFCNT_dec (req->sv1);
103	SvREFCNT_dec (req->fh2);	425	SvREFCNT_dec (req->sv2);
104
105	if (req->statdata)
106	Safefree (req->statdata);
107
108	if (req->callback)
109	SvREFCNT_dec (req->callback);	426	SvREFCNT_dec (req->callback);
110
111	if (req->type == REQ_READDIR && req->result >= 0)
112	free (req->data2ptr);
113		427
114	Safefree (req);	428	Safefree (req);
115	}	429	}
116		430
		431	static void req_cancel_subs (aio_req grp)
		432	{
		433	aio_req sub;
		434
		435	if (grp->type != EIO_GROUP)
		436	return;
		437
		438	SvREFCNT_dec (grp->sv2);
		439	grp->sv2 = 0;
		440
		441	eio_grp_cancel (grp);
		442	}
		443
		444	#ifdef USE_SOCKETS_AS_HANDLES
		445	# define TO_SOCKET(x) (win32_get_osfhandle (x))
		446	#else
		447	# define TO_SOCKET(x) (x)
		448	#endif
		449
117	static void	450	static void
118	poll_wait ()	451	create_respipe (void)
119	{	452	{
120	if (nreqs && !ress)	453	int old_readfd = respipe [0];
		454
		455	if (respipe [1] >= 0)
		456	respipe_close (TO_SOCKET (respipe [1]));
		457
		458	#ifdef _WIN32
		459	if (PerlSock_socketpair (AF_UNIX, SOCK_STREAM, 0, respipe))
		460	#else
		461	if (pipe (respipe))
		462	#endif
		463	croak ("unable to initialize result pipe");
		464
		465	if (old_readfd >= 0)
121	{	466	{
122	fd_set rfd;	467	if (dup2 (TO_SOCKET (respipe [0]), TO_SOCKET (old_readfd)) < 0)
123	FD_ZERO(&rfd);	468	croak ("unable to initialize result pipe(2)");
124	FD_SET(respipe [0], &rfd);
125		469
126	select (respipe [0] + 1, &rfd, 0, 0, 0);	470	respipe_close (respipe [0]);
		471	respipe [0] = old_readfd;
127	}	472	}
128	}
129		473
130	static int	474	#ifdef _WIN32
131	poll_cb ()	475	int arg = 1;
132	{	476	if (ioctlsocket (TO_SOCKET (respipe [0]), FIONBIO, &arg)
133	dSP;	477	|| ioctlsocket (TO_SOCKET (respipe [1]), FIONBIO, &arg))
134	int count = 0;	478	#else
135	int do_croak = 0;	479	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK)
136	aio_req req;	480	|| fcntl (respipe [1], F_SETFL, O_NONBLOCK))
		481	#endif
		482	croak ("unable to initialize result pipe(3)");
137		483
		484	respipe_osf [0] = TO_SOCKET (respipe [0]);
		485	respipe_osf [1] = TO_SOCKET (respipe [1]);
		486	}
		487
		488	static void poll_wait (void)
		489	{
		490	fd_set rfd;
		491
		492	while (eio_nreqs ())
		493	{
		494	int size;
		495
		496	X_LOCK (reslock);
		497	size = res_queue.size;
		498	X_UNLOCK (reslock);
		499
		500	if (size)
		501	return;
		502
		503	etp_maybe_start_thread ();
		504
		505	FD_ZERO (&rfd);
		506	FD_SET (respipe [0], &rfd);
		507
		508	PerlSock_select (respipe [0] + 1, &rfd, 0, 0, 0);
		509	}
		510	}
		511
		512	static int poll_cb (void)
		513	{
138	for (;;)	514	for (;;)
139	{	515	{
140	pthread_mutex_lock (&reslock);	516	int res = eio_poll ();
141	req = ress;
142		517
143	if (req)	518	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);	519	croak (0);
241	}
242	}
243		520
244	LEAVE;	521	if (!max_outstanding || max_outstanding > eio_nreqs ())
		522	return res;
245		523
246	errno = errorno;	524	poll_wait ();
247	count++;
248	}
249
250	free_req (req);
251	}	525	}
252
253	return count;
254	}	526	}
255		527
256	static void *aio_proc(void *arg);	528	static void atfork_child (void)
257
258	static void
259	start_thread (void)
260	{	529	{
261	sigset_t fullsigset, oldsigset;	530	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	}	531	}
277		532
278	static void	533	static SV *
279	send_req (aio_req req)	534	get_cb (SV *cb_sv)
280	{	535	{
281	while (started < wanted && nreqs >= started)	536	HV *st;
282	start_thread ();	537	GV *gvp;
		538	CV *cv;
283		539
284	nreqs++;	540	if (!SvOK (cb_sv))
		541	return 0;
285		542
286	pthread_mutex_lock (&reqlock);	543	cv = sv_2cv (cb_sv, &st, &gvp, 0);
287		544
288	req->next = 0;	545	if (!cv)
		546	croak ("IO::AIO callback must be undef or a CODE reference");
289		547
290	if (reqe)	548	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	}	549	}
312		550
313	static void	551	#define dREQ \
314	end_thread (void)	552	SV *cb_cv; \
315	{
316	aio_req req;	553	aio_req req; \
		554	int req_pri = next_pri; \
		555	next_pri = EIO_PRI_DEFAULT; \
		556	\
		557	cb_cv = get_cb (callback); \
		558	\
317	Newz (0, req, 1, aio_cb);	559	Newz (0, req, 1, eio_req); \
318	req->type = REQ_QUIT;	560	if (!req) \
		561	croak ("out of memory during eio_req allocation"); \
		562	\
		563	req->callback = SvREFCNT_inc (cb_cv); \
		564	req->pri = req_pri
319		565
320	send_req (req);	566	#define REQ_SEND \
321	}	567	PUTBACK; \
		568	req_submit (req); \
		569	SPAGAIN; \
		570	\
		571	if (GIMME_V != G_VOID) \
		572	XPUSHs (req_sv (req, AIO_REQ_KLASS));
322		573
323	static void min_parallel (int nthreads)
324	{
325	if (wanted < nthreads)
326	wanted = nthreads;
327	}
328
329	static void max_parallel (int nthreads)
330	{
331	int cur = started;
332
333	if (wanted > nthreads)
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	{
351	if (pipe (respipe))
352	croak ("unable to initialize result pipe");
353
354	if (fcntl (respipe [0], F_SETFL, O_NONBLOCK))
355	croak ("cannot set result pipe to nonblocking mode");
356
357	if (fcntl (respipe [1], F_SETFL, O_NONBLOCK))
358	croak ("cannot set result pipe to nonblocking mode");
359	}
360
361	/*****************************************************************************/
362	/* work around various missing functions */
363
364	#if !HAVE_PREADWRITE
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	574	static int
376	pread (int fd, void *buf, size_t count, off_t offset)	575	extract_fd (SV *fh, int wr)
377	{	576	{
378	ssize_t res;	577	int fd = PerlIO_fileno (wr ? IoOFP (sv_2io (fh)) : IoIFP (sv_2io (fh)));
379	off_t ooffset;
380		578
381	pthread_mutex_lock (&preadwritelock);	579	if (fd < 0)
382	ooffset = lseek (fd, 0, SEEK_CUR);	580	croak ("illegal fh argument, either not an OS file or read/write mode mismatch");
383	lseek (fd, offset, SEEK_SET);
384	res = read (fd, buf, count);
385	lseek (fd, ooffset, SEEK_SET);
386	pthread_mutex_unlock (&preadwritelock);
387		581
388	return res;	582	return fd;
389	}	583	}
390		584
391	static ssize_t	585	MODULE = IO::AIO PACKAGE = IO::AIO
392	pwrite (int fd, void *buf, size_t count, off_t offset)
393	{
394	ssize_t res;
395	off_t ooffset;
396		586
397	pthread_mutex_lock (&preadwritelock);	587	PROTOTYPES: ENABLE
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		588
404	return res;	589	BOOT:
405	}	590	{
		591	static const struct {
		592	const char *name;
		593	IV iv;
		594	} *civ, const_iv[] = {
		595	# define const_iv(name, value) { # name, (IV) value },
		596	# define const_eio(name) { # name, (IV) EIO_ ## name },
		597	const_iv (EXDEV , EXDEV)
		598	const_iv (ENOSYS , ENOSYS)
		599	const_iv (O_RDONLY, O_RDONLY)
		600	const_iv (O_WRONLY, O_WRONLY)
		601	const_iv (O_CREAT , O_CREAT)
		602	const_iv (O_TRUNC , O_TRUNC)
		603	#ifndef _WIN32
		604	const_iv (S_IFIFO , S_IFIFO)
406	#endif	605	#endif
		606	const_iv (FADV_NORMAL , POSIX_FADV_NORMAL)
		607	const_iv (FADV_SEQUENTIAL, POSIX_FADV_SEQUENTIAL)
		608	const_iv (FADV_RANDOM , POSIX_FADV_RANDOM)
		609	const_iv (FADV_NOREUSE , POSIX_FADV_NOREUSE)
		610	const_iv (FADV_WILLNEED , POSIX_FADV_WILLNEED)
		611	const_iv (FADV_DONTNEED , POSIX_FADV_DONTNEED)
407		612
408	#if !HAVE_FDATASYNC	613	const_eio (SYNC_FILE_RANGE_WAIT_BEFORE)
409	# define fdatasync fsync	614	const_eio (SYNC_FILE_RANGE_WRITE)
410	#endif	615	const_eio (SYNC_FILE_RANGE_WAIT_AFTER)
411		616
412	#if !HAVE_READAHEAD	617	const_eio (READDIR_DENTS)
413	# define readahead aio_readahead	618	const_eio (READDIR_DIRS_FIRST)
		619	const_eio (READDIR_STAT_ORDER)
		620	const_eio (READDIR_FOUND_UNKNOWN)
414		621
415	static ssize_t	622	const_eio (DT_UNKNOWN)
416	readahead (int fd, off_t offset, size_t count)	623	const_eio (DT_FIFO)
417	{	624	const_eio (DT_CHR)
418	char readahead_buf[4096];	625	const_eio (DT_DIR)
419		626	const_eio (DT_BLK)
420	while (count > 0)	627	const_eio (DT_REG)
421	{	628	const_eio (DT_LNK)
422	size_t len = count < sizeof (readahead_buf) ? count : sizeof (readahead_buf);	629	const_eio (DT_SOCK)
423		630	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	}	631	};
490		632
491	# elif __hpux	633	stash = gv_stashpv ("IO::AIO", 1);
492	res = sendfile (ofd, ifd, offset, count, 0, 0);
493		634
494	# elif __solaris	635	for (civ = const_iv + sizeof (const_iv) / sizeof (const_iv [0]); civ-- > const_iv; )
495	{	636	newCONSTSUB (stash, (char *)civ->name, newSViv (civ->iv));
496	struct sendfilevec vec;
497	size_t sbytes;
498		637
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 ();	638	create_respipe ();
766		639
767	atfork_parent ();	640	if (eio_init (want_poll, done_poll) < 0)
768	}	641	croak ("IO::AIO: unable to initialise eio library");
769		642
770	#define dREQ \	643	/* atfork child called in fifo order, so before eio's handler */
771	aio_req req; \	644	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	}	645	}
796		646
797	void	647	void
798	min_parallel (nthreads)	648	max_poll_reqs (int nreqs)
799	int nthreads
800	PROTOTYPE: $	649	PROTOTYPE: $
		650	CODE:
		651	eio_set_max_poll_reqs (nreqs);
801		652
802	void	653	void
803	max_parallel (nthreads)	654	max_poll_time (double nseconds)
804	int nthreads
805	PROTOTYPE: $	655	PROTOTYPE: $
806
807	int
808	max_outstanding (nreqs)
809	int nreqs
810	PROTOTYPE: $
811	CODE:	656	CODE:
812	RETVAL = max_outstanding;	657	eio_set_max_poll_time (nseconds);
		658
		659	void
		660	min_parallel (int nthreads)
		661	PROTOTYPE: $
		662	CODE:
		663	eio_set_min_parallel (nthreads);
		664
		665	void
		666	max_parallel (int nthreads)
		667	PROTOTYPE: $
		668	CODE:
		669	eio_set_max_parallel (nthreads);
		670
		671	void
		672	max_idle (int nthreads)
		673	PROTOTYPE: $
		674	CODE:
		675	eio_set_max_idle (nthreads);
		676
		677	void
		678	max_outstanding (int maxreqs)
		679	PROTOTYPE: $
		680	CODE:
813	max_outstanding = nreqs;	681	max_outstanding = maxreqs;
814		682
815	void	683	void
816	aio_open (pathname,flags,mode,callback=&PL_sv_undef)	684	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: $$$;$	685	PROTOTYPE: $$$;$
822	CODE:	686	PPCODE:
823	{	687	{
824	dREQ;	688	dREQ;
825		689
826	req->type = REQ_OPEN;	690	req->type = EIO_OPEN;
827	req->data = newSVsv (pathname);	691	req->sv1 = newSVsv (pathname);
828	req->dataptr = SvPVbyte_nolen (req->data);	692	req->ptr1 = SvPVbyte_nolen (req->sv1);
829	req->fd = flags;	693	req->int1 = flags;
830	req->mode = mode;	694	req->int2 = mode;
831		695
832	send_req (req);	696	REQ_SEND;
833	}	697	}
834		698
835	void	699	void
836	aio_close (fh,callback=&PL_sv_undef)	700	aio_fsync (SV *fh, SV *callback=&PL_sv_undef)
837	SV * fh
838	SV * callback
839	PROTOTYPE: $;$	701	PROTOTYPE: $;$
840	ALIAS:	702	ALIAS:
841	aio_close = REQ_CLOSE
842	aio_fsync = REQ_FSYNC	703	aio_fsync = EIO_FSYNC
843	aio_fdatasync = REQ_FDATASYNC	704	aio_fdatasync = EIO_FDATASYNC
844	CODE:	705	PPCODE:
845	{	706	{
		707	int fd = extract_fd (fh, 0);
846	dREQ;	708	dREQ;
847		709
848	req->type = ix;	710	req->type = ix;
849	req->fh = newSVsv (fh);	711	req->sv1 = newSVsv (fh);
850	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	712	req->int1 = fd;
851		713
852	send_req (req);	714	REQ_SEND (req);
853	}	715	}
854		716
855	void	717	void
		718	aio_sync_file_range (SV *fh, off_t offset, size_t nbytes, UV flags, SV *callback=&PL_sv_undef)
		719	PROTOTYPE: $$$$;$
		720	PPCODE:
		721	{
		722	int fd = extract_fd (fh, 0);
		723	dREQ;
		724
		725	req->type = EIO_SYNC_FILE_RANGE;
		726	req->sv1 = newSVsv (fh);
		727	req->int1 = fd;
		728	req->offs = offset;
		729	req->size = nbytes;
		730	req->int2 = flags;
		731
		732	REQ_SEND (req);
		733	}
		734
		735	void
		736	aio_close (SV *fh, SV *callback=&PL_sv_undef)
		737	PROTOTYPE: $;$
		738	PPCODE:
		739	{
		740	static int close_pipe = -1; /* dummy fd to close fds via dup2 */
		741	int fd = extract_fd (fh, 0);
		742	dREQ;
		743
		744	if (close_pipe < 0)
		745	{
		746	int pipefd [2];
		747
		748	if (pipe (pipefd) < 0
		749	|| close (pipefd [1]) < 0
		750	|| fcntl (pipefd [0], F_SETFD, FD_CLOEXEC) < 0)
		751	abort (); /*D*/
		752
		753	close_pipe = pipefd [0];
		754	}
		755
		756	req->type = EIO_DUP2;
		757	req->int1 = close_pipe;
		758	req->sv2 = newSVsv (fh);
		759	req->int2 = fd;
		760
		761	REQ_SEND (req);
		762	}
		763
		764	void
856	aio_read (fh,offset,length,data,dataoffset,callback=&PL_sv_undef)	765	aio_read (SV *fh, SV *offset, SV *length, SV8 *data, IV dataoffset, SV *callback=&PL_sv_undef)
857	SV * fh
858	UV offset
859	UV length
860	SV * data
861	UV dataoffset
862	SV * callback
863	ALIAS:	766	ALIAS:
864	aio_read = REQ_READ	767	aio_read = EIO_READ
865	aio_write = REQ_WRITE	768	aio_write = EIO_WRITE
866	PROTOTYPE: $$$$$;$	769	PROTOTYPE: $$$$$;$
867	CODE:	770	PPCODE:
868	{	771	{
869	aio_req req;
870	STRLEN svlen;	772	STRLEN svlen;
		773	int fd = extract_fd (fh, ix == EIO_WRITE);
871	char *svptr = SvPVbyte (data, svlen);	774	char *svptr = SvPVbyte (data, svlen);
872		775	UV len = SvUV (length);
873	SvUPGRADE (data, SVt_PV);
874	SvPOK_on (data);
875		776
876	if (dataoffset < 0)	777	if (dataoffset < 0)
877	dataoffset += svlen;	778	dataoffset += svlen;
878		779
879	if (dataoffset < 0 || dataoffset > svlen)	780	if (dataoffset < 0 || dataoffset > svlen)
880	croak ("data offset outside of string");	781	croak ("dataoffset outside of data scalar");
881		782
882	if (ix == REQ_WRITE)	783	if (ix == EIO_WRITE)
883	{	784	{
884	/* write: check length and adjust. */	785	/* write: check length and adjust. */
885	if (length < 0 || length + dataoffset > svlen)	786	if (!SvOK (length) || len + dataoffset > svlen)
886	length = svlen - dataoffset;	787	len = svlen - dataoffset;
887	}	788	}
888	else	789	else
889	{	790	{
890	/* read: grow scalar as necessary */	791	/* read: check type and grow scalar as necessary */
		792	SvUPGRADE (data, SVt_PV);
891	svptr = SvGROW (data, length + dataoffset);	793	svptr = SvGROW (data, len + dataoffset + 1);
892	}	794	}
893
894	if (length < 0)
895	croak ("length must not be negative");
896		795
897	{	796	{
898	dREQ;	797	dREQ;
899		798
900	req->type = ix;	799	req->type = ix;
901	req->fh = newSVsv (fh);	800	req->sv1 = newSVsv (fh);
902	req->fd = PerlIO_fileno (ix == REQ_READ ? IoIFP (sv_2io (fh))	801	req->int1 = fd;
903	: IoOFP (sv_2io (fh)));	802	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
904	req->offset = offset;	803	req->size = len;
905	req->length = length;
906	req->data = SvREFCNT_inc (data);	804	req->sv2 = SvREFCNT_inc (data);
907	req->dataptr = (char *)svptr + dataoffset;	805	req->ptr2 = (char *)svptr + dataoffset;
		806	req->stroffset = dataoffset;
908		807
909	if (!SvREADONLY (data))	808	if (!SvREADONLY (data))
910	{	809	{
911	SvREADONLY_on (data);	810	SvREADONLY_on (data);
912	req->data2ptr = (void *)data;	811	req->flags |= FLAG_SV2_RO_OFF;
913	}	812	}
914		813
915	send_req (req);	814	REQ_SEND;
916	}	815	}
917	}	816	}
918		817
919	void	818	void
		819	aio_readlink (SV8 *path, SV *callback=&PL_sv_undef)
		820	PROTOTYPE: $$;$
		821	PPCODE:
		822	{
		823	SV *data;
		824	dREQ;
		825
		826	req->type = EIO_READLINK;
		827	req->sv1 = newSVsv (path);
		828	req->ptr1 = SvPVbyte_nolen (req->sv1);
		829
		830	REQ_SEND;
		831	}
		832
		833	void
920	aio_sendfile (out_fh,in_fh,in_offset,length,callback=&PL_sv_undef)	834	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: $$$$;$	835	PROTOTYPE: $$$$;$
927	CODE:	836	PPCODE:
928	{	837	{
		838	int ifd = extract_fd (in_fh , 0);
		839	int ofd = extract_fd (out_fh, 0);
929	dREQ;	840	dREQ;
930		841
931	req->type = REQ_SENDFILE;	842	req->type = EIO_SENDFILE;
932	req->fh = newSVsv (out_fh);	843	req->sv1 = newSVsv (out_fh);
933	req->fd = PerlIO_fileno (IoIFP (sv_2io (out_fh)));	844	req->int1 = ofd;
934	req->fh2 = newSVsv (in_fh);	845	req->sv2 = newSVsv (in_fh);
935	req->fd2 = PerlIO_fileno (IoIFP (sv_2io (in_fh)));	846	req->int2 = ifd;
936	req->offset = in_offset;	847	req->offs = in_offset;
937	req->length = length;	848	req->size = length;
938		849
939	send_req (req);	850	REQ_SEND;
940	}	851	}
941		852
942	void	853	void
943	aio_readahead (fh,offset,length,callback=&PL_sv_undef)	854	aio_readahead (SV *fh, off_t offset, size_t length, SV *callback=&PL_sv_undef)
944	SV * fh
945	UV offset
946	IV length
947	SV * callback
948	PROTOTYPE: $$$;$	855	PROTOTYPE: $$$;$
949	CODE:	856	PPCODE:
950	{	857	{
		858	int fd = extract_fd (fh, 0);
951	dREQ;	859	dREQ;
952		860
953	req->type = REQ_READAHEAD;	861	req->type = EIO_READAHEAD;
954	req->fh = newSVsv (fh);	862	req->sv1 = newSVsv (fh);
955	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh)));	863	req->int1 = fd;
956	req->offset = offset;	864	req->offs = offset;
957	req->length = length;	865	req->size = length;
958		866
959	send_req (req);	867	REQ_SEND;
960	}	868	}
961		869
962	void	870	void
963	aio_stat (fh_or_path,callback=&PL_sv_undef)	871	aio_stat (SV8 *fh_or_path, SV *callback=&PL_sv_undef)
964	SV * fh_or_path
965	SV * callback
966	ALIAS:	872	ALIAS:
967	aio_stat = REQ_STAT	873	aio_stat = EIO_STAT
968	aio_lstat = REQ_LSTAT	874	aio_lstat = EIO_LSTAT
969	CODE:	875	PPCODE:
970	{	876	{
971	dREQ;	877	dREQ;
972		878
973	New (0, req->statdata, 1, Stat_t);	879	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		880
980	if (SvPOK (fh_or_path))	881	if (SvPOK (req->sv1))
981	{	882	{
982	req->type = ix;	883	req->type = ix;
983	req->data = newSVsv (fh_or_path);
984	req->dataptr = SvPVbyte_nolen (req->data);	884	req->ptr1 = SvPVbyte_nolen (req->sv1);
985	}	885	}
986	else	886	else
987	{	887	{
988	req->type = REQ_FSTAT;	888	req->type = EIO_FSTAT;
989	req->fh = newSVsv (fh_or_path);
990	req->fd = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));	889	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		890	}
		891
		892	REQ_SEND;
		893	}
		894
		895	void
		896	aio_utime (SV8 *fh_or_path, SV *atime, SV *mtime, SV *callback=&PL_sv_undef)
		897	PPCODE:
		898	{
		899	dREQ;
		900
		901	req->nv1 = SvOK (atime) ? SvNV (atime) : -1.;
		902	req->nv2 = SvOK (mtime) ? SvNV (mtime) : -1.;
		903	req->sv1 = newSVsv (fh_or_path);
		904
		905	if (SvPOK (req->sv1))
991	}	906	{
		907	req->type = EIO_UTIME;
		908	req->ptr1 = SvPVbyte_nolen (req->sv1);
		909	}
		910	else
		911	{
		912	req->type = EIO_FUTIME;
		913	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		914	}
992		915
993	send_req (req);	916	REQ_SEND;
994	}	917	}
995		918
996	void	919	void
		920	aio_truncate (SV8 *fh_or_path, SV *offset, SV *callback=&PL_sv_undef)
		921	PPCODE:
		922	{
		923	dREQ;
		924
		925	req->sv1 = newSVsv (fh_or_path);
		926	req->offs = SvOK (offset) ? SvVAL64 (offset) : -1;
		927
		928	if (SvPOK (req->sv1))
		929	{
		930	req->type = EIO_TRUNCATE;
		931	req->ptr1 = SvPVbyte_nolen (req->sv1);
		932	}
		933	else
		934	{
		935	req->type = EIO_FTRUNCATE;
		936	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		937	}
		938
		939	REQ_SEND;
		940	}
		941
		942	void
		943	aio_chmod (SV8 *fh_or_path, int mode, SV *callback=&PL_sv_undef)
		944	ALIAS:
		945	aio_chmod = EIO_CHMOD
		946	aio_mkdir = EIO_MKDIR
		947	PPCODE:
		948	{
		949	dREQ;
		950
		951	req->int2 = mode;
		952	req->sv1 = newSVsv (fh_or_path);
		953
		954	if (SvPOK (req->sv1))
		955	{
		956	req->type = ix;
		957	req->ptr1 = SvPVbyte_nolen (req->sv1);
		958	}
		959	else
		960	{
		961	req->type = EIO_FCHMOD;
		962	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		963	}
		964
		965	REQ_SEND;
		966	}
		967
		968	void
		969	aio_chown (SV8 *fh_or_path, SV *uid, SV *gid, SV *callback=&PL_sv_undef)
		970	PPCODE:
		971	{
		972	dREQ;
		973
		974	req->int2 = SvOK (uid) ? SvIV (uid) : -1;
		975	req->int3 = SvOK (gid) ? SvIV (gid) : -1;
		976	req->sv1 = newSVsv (fh_or_path);
		977
		978	if (SvPOK (req->sv1))
		979	{
		980	req->type = EIO_CHOWN;
		981	req->ptr1 = SvPVbyte_nolen (req->sv1);
		982	}
		983	else
		984	{
		985	req->type = EIO_FCHOWN;
		986	req->int1 = PerlIO_fileno (IoIFP (sv_2io (fh_or_path)));
		987	}
		988
		989	REQ_SEND;
		990	}
		991
		992	void
		993	aio_readdirx (SV8 *pathname, IV flags, SV *callback=&PL_sv_undef)
		994	PPCODE:
		995	{
		996	dREQ;
		997
		998	req->type = EIO_READDIR;
		999	req->sv1 = newSVsv (pathname);
		1000	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1001	req->int1 = flags | EIO_READDIR_DENTS | EIO_READDIR_CUSTOM1;
		1002
		1003	if (flags & EIO_READDIR_DENTS)
		1004	req->int1 |= EIO_READDIR_CUSTOM2;
		1005
		1006	REQ_SEND;
		1007	}
		1008
		1009	void
997	aio_unlink (pathname,callback=&PL_sv_undef)	1010	aio_unlink (SV8 *pathname, SV *callback=&PL_sv_undef)
998	SV * pathname
999	SV * callback
1000	ALIAS:	1011	ALIAS:
1001	aio_unlink = REQ_UNLINK	1012	aio_unlink = EIO_UNLINK
1002	aio_rmdir = REQ_RMDIR	1013	aio_rmdir = EIO_RMDIR
1003	aio_readdir = REQ_READDIR	1014	aio_readdir = EIO_READDIR
1004	CODE:	1015	PPCODE:
1005	{	1016	{
1006	dREQ;	1017	dREQ;
1007		1018
1008	req->type = ix;	1019	req->type = ix;
1009	req->data = newSVsv (pathname);	1020	req->sv1 = newSVsv (pathname);
1010	req->dataptr = SvPVbyte_nolen (req->data);	1021	req->ptr1 = SvPVbyte_nolen (req->sv1);
1011
1012	send_req (req);
1013	}
1014		1022
		1023	REQ_SEND;
		1024	}
		1025
1015	void	1026	void
1016	aio_link (oldpath,newpath,callback=&PL_sv_undef)	1027	aio_link (SV8 *oldpath, SV8 *newpath, SV *callback=&PL_sv_undef)
1017	SV * oldpath
1018	SV * newpath
1019	SV * callback
1020	ALIAS:	1028	ALIAS:
1021	aio_link = REQ_LINK	1029	aio_link = EIO_LINK
1022	aio_symlink = REQ_SYMLINK	1030	aio_symlink = EIO_SYMLINK
1023	aio_rename = REQ_RENAME	1031	aio_rename = EIO_RENAME
1024	CODE:	1032	PPCODE:
1025	{	1033	{
1026	dREQ;	1034	dREQ;
1027		1035
1028	req->type = ix;	1036	req->type = ix;
1029	req->fh = newSVsv (oldpath);	1037	req->sv1 = newSVsv (oldpath);
1030	req->data2ptr = SvPVbyte_nolen (req->fh);	1038	req->ptr1 = SvPVbyte_nolen (req->sv1);
1031	req->data = newSVsv (newpath);	1039	req->sv2 = newSVsv (newpath);
1032	req->dataptr = SvPVbyte_nolen (req->data);	1040	req->ptr2 = SvPVbyte_nolen (req->sv2);
1033		1041
1034	send_req (req);	1042	REQ_SEND;
1035	}	1043	}
1036		1044
1037	#if 0
1038
1039	# undocumented, because it does not cancel active requests
1040	void	1045	void
1041	cancel_most_requests ()	1046	aio_mknod (SV8 *pathname, int mode, UV dev, SV *callback=&PL_sv_undef)
		1047	PPCODE:
		1048	{
		1049	dREQ;
		1050
		1051	req->type = EIO_MKNOD;
		1052	req->sv1 = newSVsv (pathname);
		1053	req->ptr1 = SvPVbyte_nolen (req->sv1);
		1054	req->int2 = (mode_t)mode;
		1055	req->offs = dev;
		1056
		1057	REQ_SEND;
		1058	}
		1059
		1060	void
		1061	aio_busy (double delay, SV *callback=&PL_sv_undef)
		1062	PPCODE:
		1063	{
		1064	dREQ;
		1065
		1066	req->type = EIO_BUSY;
		1067	req->nv1 = delay < 0. ? 0. : delay;
		1068
		1069	REQ_SEND;
		1070	}
		1071
		1072	void
		1073	aio_group (SV *callback=&PL_sv_undef)
1042	PROTOTYPE:	1074	PROTOTYPE: ;$
1043	CODE:	1075	PPCODE:
1044	{	1076	{
1045	aio_req *req;	1077	dREQ;
1046		1078
1047	pthread_mutex_lock (&reqlock);	1079	req->type = EIO_GROUP;
1048	for (req = reqs; req; req = req->next)
1049	req->flags |= 1;
1050	pthread_mutex_unlock (&reqlock);
1051		1080
1052	pthread_mutex_lock (&reslock);	1081	req_submit (req);
1053	for (req = ress; req; req = req->next)	1082	XPUSHs (req_sv (req, AIO_GRP_KLASS));
1054	req->flags |= 1;
1055	pthread_mutex_unlock (&reslock);
1056	}	1083	}
1057		1084
1058	#endif	1085	void
		1086	aio_nop (SV *callback=&PL_sv_undef)
		1087	ALIAS:
		1088	aio_nop = EIO_NOP
		1089	aio_sync = EIO_SYNC
		1090	PPCODE:
		1091	{
		1092	dREQ;
		1093
		1094	req->type = ix;
		1095
		1096	REQ_SEND;
		1097	}
		1098
		1099	int
		1100	aioreq_pri (int pri = 0)
		1101	PROTOTYPE: ;$
		1102	CODE:
		1103	RETVAL = next_pri;
		1104	if (items > 0)
		1105	{
		1106	if (pri < EIO_PRI_MIN) pri = EIO_PRI_MIN;
		1107	if (pri > EIO_PRI_MAX) pri = EIO_PRI_MAX;
		1108	next_pri = pri;
		1109	}
		1110	OUTPUT:
		1111	RETVAL
		1112
		1113	void
		1114	aioreq_nice (int nice = 0)
		1115	CODE:
		1116	nice = next_pri - nice;
		1117	if (nice < EIO_PRI_MIN) nice = EIO_PRI_MIN;
		1118	if (nice > EIO_PRI_MAX) nice = EIO_PRI_MAX;
		1119	next_pri = nice;
1059		1120
1060	void	1121	void
1061	flush ()	1122	flush ()
1062	PROTOTYPE:	1123	PROTOTYPE:
1063	CODE:	1124	CODE:
1064	while (nreqs)	1125	while (eio_nreqs ())
1065	{	1126	{
1066	poll_wait ();	1127	poll_wait ();
1067	poll_cb ();	1128	poll_cb ();
1068	}	1129	}
1069		1130
1070	void	1131	int
1071	poll()	1132	poll()
1072	PROTOTYPE:	1133	PROTOTYPE:
1073	CODE:	1134	CODE:
1074	if (nreqs)
1075	{
1076	poll_wait ();	1135	poll_wait ();
1077	poll_cb ();	1136	RETVAL = poll_cb ();
1078	}	1137	OUTPUT:
		1138	RETVAL
1079		1139
1080	int	1140	int
1081	poll_fileno()	1141	poll_fileno()
1082	PROTOTYPE:	1142	PROTOTYPE:
1083	CODE:	1143	CODE:
…		…
1095		1155
1096	void	1156	void
1097	poll_wait()	1157	poll_wait()
1098	PROTOTYPE:	1158	PROTOTYPE:
1099	CODE:	1159	CODE:
1100	if (nreqs)
1101	poll_wait ();	1160	poll_wait ();
1102		1161
1103	int	1162	int
1104	nreqs()	1163	nreqs()
1105	PROTOTYPE:	1164	PROTOTYPE:
1106	CODE:	1165	CODE:
1107	RETVAL = nreqs;	1166	RETVAL = eio_nreqs ();
1108	OUTPUT:	1167	OUTPUT:
1109	RETVAL	1168	RETVAL
1110		1169
		1170	int
		1171	nready()
		1172	PROTOTYPE:
		1173	CODE:
		1174	RETVAL = eio_nready ();
		1175	OUTPUT:
		1176	RETVAL
		1177
		1178	int
		1179	npending()
		1180	PROTOTYPE:
		1181	CODE:
		1182	RETVAL = eio_npending ();
		1183	OUTPUT:
		1184	RETVAL
		1185
		1186	int
		1187	nthreads()
		1188	PROTOTYPE:
		1189	CODE:
		1190	RETVAL = eio_nthreads ();
		1191	OUTPUT:
		1192	RETVAL
		1193
		1194	int
		1195	fadvise (aio_rfd fh, off_t offset, off_t length, IV advice)
		1196	PROTOTYPE: $$$$
		1197	CODE:
		1198	#if _XOPEN_SOURCE >= 600 && !NO_FADVISE
		1199	RETVAL = posix_fadvise (fh, offset, length, advice);
		1200	#else
		1201	RETVAL = errno = ENOSYS;
		1202	#endif
		1203	OUTPUT:
		1204	RETVAL
		1205
		1206	ssize_t
		1207	sendfile (aio_wfd ofh, aio_rfd ifh, off_t offset, size_t count)
		1208	PROTOTYPE: $$$$
		1209	CODE:
		1210	eio_sendfile_sync (ofh, ifh, offset, count);
		1211
		1212	void _on_next_submit (SV *cb)
		1213	CODE:
		1214	SvREFCNT_dec (on_next_submit);
		1215	on_next_submit = SvOK (cb) ? newSVsv (cb) : 0;
		1216
		1217	PROTOTYPES: DISABLE
		1218
		1219	MODULE = IO::AIO PACKAGE = IO::AIO::REQ
		1220
		1221	void
		1222	cancel (aio_req_ornot req)
		1223	CODE:
		1224	eio_cancel (req);
		1225
		1226	void
		1227	cb (aio_req_ornot req, SV *callback=&PL_sv_undef)
		1228	PPCODE:
		1229	{
		1230	if (GIMME_V != G_VOID)
		1231	XPUSHs (req->callback ? sv_2mortal (newRV_inc (req->callback)) : &PL_sv_undef);
		1232
		1233	if (items > 1)
		1234	{
		1235	SV *cb_cv = get_cb (callback);
		1236
		1237	SvREFCNT_dec (req->callback);
		1238	req->callback = SvREFCNT_inc (cb_cv);
		1239	}
		1240	}
		1241
		1242	MODULE = IO::AIO PACKAGE = IO::AIO::GRP
		1243
		1244	void
		1245	add (aio_req grp, ...)
		1246	PPCODE:
		1247	{
		1248	int i;
		1249
		1250	if (grp->int1 == 2)
		1251	croak ("cannot add requests to IO::AIO::GRP after the group finished");
		1252
		1253	for (i = 1; i < items; ++i )
		1254	{
		1255	aio_req req;
		1256
		1257	if (GIMME_V != G_VOID)
		1258	XPUSHs (sv_2mortal (newSVsv (ST (i))));
		1259
		1260	req = SvAIO_REQ (ST (i));
		1261
		1262	if (req)
		1263	eio_grp_add (grp, req);
		1264	}
		1265	}
		1266
		1267	void
		1268	cancel_subs (aio_req_ornot req)
		1269	CODE:
		1270	req_cancel_subs (req);
		1271
		1272	void
		1273	result (aio_req grp, ...)
		1274	CODE:
		1275	{
		1276	int i;
		1277	AV *av;
		1278
		1279	grp->errorno = errno;
		1280
		1281	av = newAV ();
		1282	av_extend (av, items - 1);
		1283
		1284	for (i = 1; i < items; ++i )
		1285	av_push (av, newSVsv (ST (i)));
		1286
		1287	SvREFCNT_dec (grp->sv1);
		1288	grp->sv1 = (SV *)av;
		1289	}
		1290
		1291	void
		1292	errno (aio_req grp, int errorno = errno)
		1293	CODE:
		1294	grp->errorno = errorno;
		1295
		1296	void
		1297	limit (aio_req grp, int limit)
		1298	CODE:
		1299	eio_grp_limit (grp, limit);
		1300
		1301	void
		1302	feed (aio_req grp, SV *callback=&PL_sv_undef)
		1303	CODE:
		1304	{
		1305	SvREFCNT_dec (grp->sv2);
		1306	grp->sv2 = newSVsv (callback);
		1307	grp->feed = aio_grp_feed;
		1308
		1309	if (grp->int2 <= 0)
		1310	grp->int2 = 2;
		1311
		1312	eio_grp_limit (grp, grp->int2);
		1313	}
		1314

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