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/cvs/IO-AIO/AIO.xs

Comparing IO-AIO/AIO.xs (file contents):
Revision 1.43 by root, Sat Oct 21 23:06:04 2006 UTC vs.
Revision 1.156 by root, Thu Nov 12 00:01:52 2009 UTC

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

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